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#define BLOCKMOVE
#define Z_WAKE
static char rcsid[] =
"$Revision: 1.1 $$Date: 2005-12-20 10:16:40 $";
 
/*
 *  linux/drivers/char/cyclades.c
 *
 * This file contains the driver for the Cyclades Cyclom-Y multiport
 * serial boards.
 *
 * Maintained by Ivan Passos (ivan@cyclades.com),
 * Marcio Saito (marcio@cyclades.com) and
 * Randolph Bentson (bentson@grieg.seaslug.org).
 *
 * For Technical support and installation problems, please send e-mail
 * to support@cyclades.com.
 *
 * Much of the design and some of the code came from serial.c
 * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
 * and then fixed as suggested by Michael K. Johnson 12/12/92.
 *
 * This version does not support shared irq's.
 *
 * This module exports the following rs232 io functions:
 *   int cy_init(void);
 *   int cy_open(struct tty_struct *tty, struct file *filp);
 * and the following functions for modularization.
 *   int init_module(void);
 *   void cleanup_module(void);
 *
 * $Log: not supported by cvs2svn $
 * Revision 1.1.1.1  2001/09/10 07:44:15  simons
 * Initial import
 *
 * Revision 1.1.1.1  2001/07/02 17:58:25  simons
 * Initial revision
 *
 * Revision 2.1.2.1   1999/04/08 16:17:18 ivan
 * cy_wait_until_sent function revisited;
 * Module usage counter scheme revisited;
 * Added support to the upcoming Y PCI boards (i.e., support to additional
 * PCI Device ID's).
 *
 * Revision 2.1.1.12  1999/01/19 13:08:18 ivan
 * Fixed PLX PCI bridge registers mapping for Cyclom-Y boards, so
 * that it works even with addresses out of memory page boundaries.
 *
 * Revision 2.1.1.11  1998/12/30 18:58:47 ivan
 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 * order to make PLX9050-based boards work with certain motherboards.
 *
 * Revision 2.1.1.10  1998/11/12 16:08:23 ivan
 * cy_close function now resets (correctly) the tty->closing flag;
 * JIFFIES_DIFF macro fixed.
 *
 * Revision 2.1.1.9  1998/09/02 14:47:01 ivan
 * Fixed bug in cy_close function, which was not informing HW of
 * which port should have the reception disabled before doing so;
 * fixed Cyclom-8YoP hardware detection bug.
 *
 * Revision 2.1.1.8  1998/08/20 17:04:54 ivan
 * Fixed bug in cy_close function, which causes malfunction
 * of one of the first 4 ports when a higher port is closed
 * (Cyclom-Y only).
 *
 * Revision 2.1.1.7  1998/08/10 17:01:45 ivan
 * Fixed Cyclom-4Yo hardware detection bug.
 *
 * Revision 2.1.1.6  1998/08/04 12:19:36 ivan
 * cyy_interrupt changed once more to avoid occurence of kernel
 * oopses during PPP operation.
 *
 * Revision 2.1.1.5  1998/08/03 16:55:59 ivan
 * /proc/cyclades implementation (only for monolythic driver)
 * with great collaboration of Marc Lewis <marc@blarg.net>;
 * cyy_interrupt was changed to avoid occurence of kernel oopses
 * during PPP operation.
 *
 * Revision 2.1.1.4  1998/06/01 18:01:19 ivan
 * data loss prevention revisited (cy_wait_until_sent created);
 * MOD_COUNT bug (which caused the usage decrementing not to work
 * properly) fixed.
 *
 * Revision 2.1.1.3b  1998/05/14 10:14:00 ivan
 * temporary workaround for losing SIGHUPs in PPP connections
 * (Cyclom-Y only).
 *
 * Revision 2.1.1.3a  1998/03/16 18:01:12 ivan
 * cleaned up the data loss fix;
 * fixed XON/XOFF handling once more (Cyclades-Z);
 * general revision in the driver routines;
 * introduction of a mechanism to prevent data loss with slow
 * printers, by forcing a delay before closing the port.
 *
 * Revision 2.1.1.2a  1998/02/17 16:50:00 ivan
 * fixed detection/handling of new CD1400 in Ye boards;
 * fixed XON/XOFF handling (Cyclades-Z);
 * fixed data loss caused by a premature port close;
 * introduction of a flag that holds the CD1400 version ID per port
 * (used by the CYGETCD1400VER new ioctl).
 *
 * Revision 2.1.1.1a  1997/12/03 17:31:19 ivan
 * Code review for the module cleanup routine;
 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 * includes anonymous changes regarding signal_pending.
 *
 * Revision 2.1  1997/11/01 17:42:41 ivan
 * Changes in the driver to support Alpha systems (except 8Zo V_1);
 * BREAK fix for the Cyclades-Z boards;
 * driver inactivity control by FW implemented;
 * introduction of flag that allows driver to take advantage of
 * a special CD1400 feature related to HW flow control;
 * added support for the CD1400  rev. J (Cyclom-Y boards);
 * introduction of ioctls to:
 *  - control the rtsdtr_inv flag (Cyclom-Y);
 *  - control the rflow flag (Cyclom-Y);
 *  - adjust the polling interval (Cyclades-Z);
 *
 * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 * Fixes related to kernel version conditional
 * compilation.
 *
 * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 * Compatibility issues between kernels 2.0.x and
 * 2.1.x (mainly related to clear_bit function).
 *
 * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 * Changes to define the memory window according to the
 * board type.
 *
 * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 * Changes to suport new cycladesZ boards.
 *
 * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 * Merge of Bentson's and Daniel's version 1.36.4.28.
 * Corrects bug in cy_detect_pci: check if there are more
 * ports than the number of static structs allocated.
 * Warning message during initialization if this driver is
 * used with the new generation of cycladesZ boards.  Those
 * will be supported only in next release of the driver.
 * Corrects bug in cy_detect_pci and cy_detect_isa that
 * returned wrong number of VALID boards, when a cyclomY
 * was found with no serial modules connected.
 * Changes to use current (2.1.x) kernel subroutine names
 * and created macros for compilation with 2.0.x kernel,
 * instead of the other way around.
 *
 * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 * Change queue_task_irq_off to queue_task_irq.
 * The inline function queue_task_irq_off (tqueue.h)
 * was removed from latest releases of 2.1.x kernel.
 * Use of macro __initfunc to mark the initialization
 * routines, so memory can be reused.
 * Also incorporate implementation of critical region
 * in function cleanup_module() created by anonymous
 * linuxer.
 *
 * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 * Change to support new firmware that solves DCD problem:
 * application could fail to receive SIGHUP signal when DCD
 * varying too fast.
 *
 * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 * Changed for suport linux versions 2.1.X.
 * Backward compatible with linux versions 2.0.X.
 * Corrected illegal use of filler field in
 * CH_CTRL struct.
 * Deleted some debug messages.
 *
 * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 * Included check for NULL tty pointer in cyz_poll.
 *
 * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 * Bill Foster at Blarg! Online services noticed that
 * some of the switch elements of -Z modem control
 * lacked a closing "break;"
 *
 * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 * Changed low water threshold for buffer xmit_buf
 *
 * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 * Marcio provided fix to modem status fetch for -Z
 *
 * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 * improve mapping of -Z control page (thanks to Steve
 * Price <stevep@fa.tdktca.com> for help on this)
 *
 * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 * shift from CPU-bound to memcopy in cyz_polling operation
 *
 * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 * Added support to set and report higher speeds.
 *
 * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 * Some fixes in the HW flow control for the BETA release.
 * Don't try to register the IRQ.
 *
 * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 * make sure "cyc" appears in all kernel messages; all soft interrupts
 * handled by same routine; recognize out-of-band reception; comment
 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 * fix race condition in -Z buffer management; only -Y needs to explictly
 * flush chars; tidy up some startup messages;
 *
 * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 * shift MOD_INC_USE_COUNT location to match
 * serial.c; purge some diagnostic messages;
 *
 * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 * enable modem status messages and fetch & process them; note
 * time of last activity type for each port; set_line_char now
 * supports more than line 0 and treats 0 baud correctly;
 * get_modem_info senses rs_status;
 *
 * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 * barely works--now's time to turn on
 * more features 'til it breaks
 *
 * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 * check more -Z board status; shorten boot message
 *
 * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 * fix reference to ch_ctrl in startup; verify return
 * values from cyz_issue_cmd and cyz_update_channel;
 * more stuff to get modem control correct;
 *
 * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 * more -Z stuff folded in; re-order changes to put -Z stuff
 * after -Y stuff (to make changes clearer)
 *
 * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 * Add code to send break.  Clear firmware ID word at startup (so
 * that other code won't talk to inactive board).
 *
 * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 * add code for -Z in set_line_char
 *
 * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 * fold more -Z stuff (or in some cases, error messages)
 * into driver; add text to "don't know what to do" messages.
 *
 * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 * moved compile-time flags near top of file; cosmetic changes
 * to narrow text (to allow 2-up printing); changed many declarations
 * to "static" to limit external symbols; shuffled code order to
 * coalesce -Y and -Z specific code, also to put internal functions
 * in order of tty_driver structure; added code to recognize -Z
 * ports (and for moment, do nothing or report error); add cy_startup
 * to parse boot command line for extra base addresses for ISA probes;
 *
 * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 * reorder some code, fix types of some vars (int vs. long),
 * add cy_setup to support user declared ISA addresses
 *
 * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 * dump ioctl based firmware load (it's now a user level
 * program); ensure uninitialzed ports cannot be used
 *
 * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 * rename vars and restructure some code
 *
 * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 * get right status back after boot load
 *
 * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 * successfully loads firmware
 *
 * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 * add more of the code for the boot/load ioctls
 *
 * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 * start to add Z functionality--starting with ioctl
 * for loading firmware
 *
 * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 * added code to recognize Z/PCI card at initialization; report
 * presence, but card is not initialized (because firmware needs
 * to be loaded)
 *
 * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 * starting minor number at zero; added missing verify_area
 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
 *
 * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 * remove unneeded boot message & fix CLOCAL hardware flow
 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 * remove unused diagnostic statements; minor 0 is first;
 *
 * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 * The kernel function vremap (available only in later 1.3.xx kernels)
 * allows the access to memory addresses above the RAM. This revision
 * of the driver supports PCI boards below 1Mb (device id 0x100) and
 * above 1Mb (device id 0x101).
 *
 * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 * Some global changes to interrupt handling spilled into
 * this driver--mostly unused arguments in system function
 * calls.  Also added change by Marcio Saito which should
 * reduce lost interrupts at startup by fast processors.
 *
 * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 * in 1.3.41 kernel to remove a possible race condition, extend
 * some error messages, and let the driver run as a loadable module
 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 * possible race condition.
 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 *
 * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 * Changes by Linus Torvalds in 1.3.33 kernel distribution
 * required due to reordering of driver initialization.
 * Drivers are now initialized *after* memory management.
 *
 * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 * remove printk from ISR; fix typo
 *
 * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 * Minor fixes in the PCI board support. PCI function calls in
 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 * <duncan@okay.com>. "bad serial count" message removed.
 *
 * Revision 1.36.3  1995/08/22  09:19:42  marcio
 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 * board initialization. Changes in the boot messages. The driver
 * supports up to 4 boards and 64 ports by default.
 *
 * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 *
 * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 * add missing break in modem control block in ioctl switch statement
 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 *
 * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 * make sure CTS flow control is set as soon as possible (thanks
 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 *
 * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 * initialize defaults for receive threshold and stale data timeout;
 * cosmetic changes;
 *
 * Revision 1.36  1995/03/10  23:33:53  bentson
 * added support of chips 4-7 in 32 port Cyclom-Ye;
 * fix cy_interrupt pointer dereference problem
 * (Joe Portman <baron@aa.net>);
 * give better error response if open is attempted on non-existent port
 * (Zachariah Vaum <jchryslr@netcom.com>);
 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 * conditional compilation for -16Y on systems with fast, noisy bus;
 * comment out diagnostic print function;
 * cleaned up table of base addresses;
 * set receiver time-out period register to correct value,
 * set receive threshold to better default values,
 * set chip timer to more accurate 200 Hz ticking,
 * add code to monitor and modify receive parameters
 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 * <njs@scifi.emi.net>);
 *
 * Revision 1.35  1994/12/16  13:54:18  steffen
 * additional patch by Marcio Saito for board detection
 * Accidently left out in 1.34
 *
 * Revision 1.34  1994/12/10  12:37:12  steffen
 * This is the corrected version as suggested by Marcio Saito
 *
 * Revision 1.33  1994/12/01  22:41:18  bentson
 * add hooks to support more high speeds directly; add tytso
 * patch regarding CLOCAL wakeups
 *
 * Revision 1.32  1994/11/23  19:50:04  bentson
 * allow direct kernel control of higher signalling rates;
 * look for cards at additional locations
 *
 * Revision 1.31  1994/11/16  04:33:28  bentson
 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 * a problem in chars_in_buffer has been resolved by some
 * small changes;  this should yield smoother output
 *
 * Revision 1.30  1994/11/16  04:28:05  bentson
 * Fix from Corey Minyard, Internet: minyard@metronet.com,
 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 * cy_hangup that appears to clear up much (all?) of the
 * DTR glitches; also he's added/cleaned-up diagnostic messages
 *
 * Revision 1.29  1994/11/16  04:16:07  bentson
 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 * operate higher speeds in same way as other serial ports;
 * add more serial ports (for up to two 16-port muxes).
 *
 * Revision 1.28  1994/11/04  00:13:16  root
 * turn off diagnostic messages
 *
 * Revision 1.27  1994/11/03  23:46:37  root
 * bunch of changes to bring driver into greater conformance
 * with the serial.c driver (looking for missed fixes)
 *
 * Revision 1.26  1994/11/03  22:40:36  root
 * automatic interrupt probing fixed.
 *
 * Revision 1.25  1994/11/03  20:17:02  root
 * start to implement auto-irq
 *
 * Revision 1.24  1994/11/03  18:01:55  root
 * still working on modem signals--trying not to drop DTR
 * during the getty/login processes
 *
 * Revision 1.23  1994/11/03  17:51:36  root
 * extend baud rate support; set receive threshold as function
 * of baud rate; fix some problems with RTS/CTS;
 *
 * Revision 1.22  1994/11/02  18:05:35  root
 * changed arguments to udelay to type long to get
 * delays to be of correct duration
 *
 * Revision 1.21  1994/11/02  17:37:30  root
 * employ udelay (after calibrating loops_per_second earlier
 * in init/main.c) instead of using home-grown delay routines
 *
 * Revision 1.20  1994/11/02  03:11:38  root
 * cy_chars_in_buffer forces a return value of 0 to let
 * login work (don't know why it does); some functions
 * that were returning EFAULT, now executes the code;
 * more work on deciding when to disable xmit interrupts;
 *
 * Revision 1.19  1994/11/01  20:10:14  root
 * define routine to start transmission interrupts (by enabling
 * transmit interrupts); directly enable/disable modem interrupts;
 *
 * Revision 1.18  1994/11/01  18:40:45  bentson
 * Don't always enable transmit interrupts in startup; interrupt on
 * TxMpty instead of TxRdy to help characters get out before shutdown;
 * restructure xmit interrupt to check for chars first and quit if
 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 * (to my view);
 *
 * Revision 1.17  1994/10/30  04:39:45  bentson
 * rename serial_driver and callout_driver to cy_serial_driver and
 * cy_callout_driver to avoid linkage interference; initialize
 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 * from cyclades_port structure; add paranoia check to cy_close;
 *
 * Revision 1.16  1994/10/30  01:14:33  bentson
 * change major numbers; add some _early_ return statements;
 *
 * Revision 1.15  1994/10/29  06:43:15  bentson
 * final tidying up for clean compile;  enable some error reporting
 *
 * Revision 1.14  1994/10/28  20:30:22  Bentson
 * lots of changes to drag the driver towards the new tty_io
 * structures and operation.  not expected to work, but may
 * compile cleanly.
 *
 * Revision 1.13  1994/07/21  23:08:57  Bentson
 * add some diagnostic cruft; support 24 lines (for testing
 * both -8Y and -16Y cards; be more thorough in servicing all
 * chips during interrupt; add "volatile" a few places to
 * circumvent compiler optimizations; fix base & offset
 * computations in block_til_ready (was causing chip 0 to
 * stop operation)
 *
 * Revision 1.12  1994/07/19  16:42:11  Bentson
 * add some hackery for kernel version 1.1.8; expand
 * error messages; refine timing for delay loops and
 * declare loop params volatile
 *
 * Revision 1.11  1994/06/11  21:53:10  bentson
 * get use of save_car right in transmit interrupt service
 *
 * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 * add some diagnostic printing; try to fix save_car stuff
 *
 * Revision 1.10  1994/06/11  20:36:08  bentson
 * clean up compiler warnings
 *
 * Revision 1.9  1994/06/11  19:42:46  bentson
 * added a bunch of code to support modem signalling
 *
 * Revision 1.8  1994/06/11  17:57:07  bentson
 * recognize break & parity error
 *
 * Revision 1.7  1994/06/05  05:51:34  bentson
 * Reorder baud table to be monotonic; add cli to CP; discard
 * incoming characters and status if the line isn't open; start to
 * fold code into cy_throttle; start to port get_serial_info,
 * set_serial_info, get_modem_info, set_modem_info, and send_break
 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 * get flow control characters from tty struct; invalidate ports w/o
 * hardware;
 *
 * Revision 1.6  1994/05/31  18:42:21  bentson
 * add a loop-breaker in the interrupt service routine;
 * note when port is initialized so that it can be shut
 * down under the right conditions; receive works without
 * any obvious errors
 *
 * Revision 1.5  1994/05/30  00:55:02  bentson
 * transmit works without obvious errors
 *
 * Revision 1.4  1994/05/27  18:46:27  bentson
 * incorporated more code from lib_y.c; can now print short
 * strings under interrupt control to port zero; seems to
 * select ports/channels/lines correctly
 *
 * Revision 1.3  1994/05/25  22:12:44  bentson
 * shifting from multi-port on a card to proper multiplexor
 * data structures;  added skeletons of most routines
 *
 * Revision 1.2  1994/05/19  13:21:43  bentson
 * start to crib from other sources
 *
 */
 
/* If you need to install more boards than NR_CARDS, change the constant
   in the definition below. No other change is necessary to support up to
   eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 
#define NR_CARDS        4
 
/*
   If the total number of ports is larger than NR_PORTS, change this
   constant in the definition below. No other change is necessary to
   support more boards/ports. */
 
#define NR_PORTS        128
 
#define ZE_V1_NPORTS    64
#define ZO_V1   0
#define ZO_V2   1
#define ZE_V1   2
 
#define SERIAL_PARANOIA_CHECK
#undef  CY_DEBUG_OPEN
#undef  CY_DEBUG_THROTTLE
#undef  CY_DEBUG_OTHER
#undef  CY_DEBUG_IO
#undef  CY_DEBUG_COUNT
#undef  CY_DEBUG_DTR
#undef  CY_DEBUG_WAIT_UNTIL_SENT
#undef  CY_DEBUG_INTERRUPTS
#undef  CY_16Y_HACK
#undef  CY_ENABLE_MONITORING
#undef  CY_PCI_DEBUG
 
#if 0
#define PAUSE __asm__("nop");
#else
#define PAUSE ;
#endif
 
#define cy_min(a,b) (((a)<(b))?(a):(b))
 
#if 0
/********
 * For the next two macros, it is assumed that the buffer size is a
 * power of 2
 ********/
 
#define CHARS_IN_BUF(buf_ctrl) \
    ((cy_readl(&buf_ctrl->rx_put) - \
      cy_readl(&buf_ctrl->rx_get) + \
      cy_readl(&buf_ctrl->rx_bufsize)) & \
                  (cy_readl(&buf_ctrl->rx_bufsize) - 1))
 
#define SPACE_IN_BUF(buf_ctrl) \
    ((cy_readl(&buf_ctrl->tx_get) - \
      cy_readl(&buf_ctrl->tx_put) + \
      cy_readl(&buf_ctrl->tx_bufsize) - 1) & \
                  (cy_readl(&buf_ctrl->tx_bufsize) - 1))
#endif
 
#include <linux/module.h>
 
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/cyclades.h>
#include <linux/delay.h>
#include <linux/major.h>
#include <linux/mm.h>
 
#include <asm/system.h>
#include <asm/io.h>
#include <asm/segment.h>
#include <asm/bitops.h>
 
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/bios32.h>
#include <linux/pci.h>
 
#include <linux/version.h>
 
#ifdef CONFIG_PROC_FS
#include <linux/stat.h>
#include <linux/proc_fs.h>
#endif
 
#define __initfunc(__arginit)   __arginit
#define copy_from_user          memcpy_fromfs
#define copy_to_user            memcpy_tofs
#define cy_get_user             get_fs_long
#define cy_put_user             put_fs_long
#define ioremap                 vremap
 
#ifndef MIN
#define MIN(a,b)        ((a) < (b) ? (a) : (b))
#endif
 
#define IS_CYC_Z(card) ((card).num_chips == -1)
 
#define Z_FPGA_CHECK(card) \
    ((cy_readl(&((struct RUNTIME_9060 *) \
                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 
#define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 *) \
                        ((card).ctl_addr))->mail_box_0)) || \
                        Z_FPGA_CHECK(card)) && \
                        (ZFIRM_ID==cy_readl(&((struct FIRM_ID *) \
                        ((card).base_addr+ID_ADDRESS))->signature)))
 
#define WAKEUP_CHARS (SERIAL_XMIT_SIZE-256)
 
#define STD_COM_FLAGS (0)
 
#define SERIAL_TYPE_NORMAL  1
#define SERIAL_TYPE_CALLOUT 2
 
#define JIFFIES_DIFF(n, j)      ((j) - (n))
 
DECLARE_TASK_QUEUE(tq_cyclades);
 
struct tty_driver cy_serial_driver, cy_callout_driver;
 
static volatile int cy_irq_triggered;
static volatile int cy_triggered;
static int cy_wild_int_mask;
static volatile ucchar *intr_base_addr;
 
/* This is the address lookup table. The driver will probe for
   Cyclom-Y/ISA boards at all addresses in here. If you want the
   driver to probe addresses at a different address, add it to
   this table.  If the driver is probing some other board and
   causing problems, remove the offending address from this table.
   The cy_setup function extracts additional addresses from the
   boot options line.  The form is "cyclades=address,address..."
*/
 
static unsigned char *cy_isa_addresses[] = {
        (unsigned char *) 0xD0000,
        (unsigned char *) 0xD2000,
        (unsigned char *) 0xD4000,
        (unsigned char *) 0xD6000,
        (unsigned char *) 0xD8000,
        (unsigned char *) 0xDA000,
        (unsigned char *) 0xDC000,
        (unsigned char *) 0xDE000,
        0,0,0,0,0,0,0,0
};
#define NR_ISA_ADDRS (sizeof(cy_isa_addresses)/sizeof(unsigned char*))
 
/* This is the per-card data structure containing address, irq, number of
   channels, etc. This driver supports a maximum of NR_CARDS cards.
*/
static struct cyclades_card cy_card[NR_CARDS];
 
/* This is the per-channel data structure containing pointers, flags
 and variables for the port. This driver supports a maximum of NR_PORTS.
*/
static struct cyclades_port cy_port[NR_PORTS];
 
static int cy_next_channel = 0; /* next minor available */
 
static int serial_refcount;
 
static struct tty_struct *serial_table[NR_PORTS];
static struct termios *serial_termios[NR_PORTS];
static struct termios *serial_termios_locked[NR_PORTS];
 
/* This is the per-irq data structure,
   it maps an irq to the corresponding card */
 
static struct cyclades_card     *IRQ_cards[16];
 
 
/*
 * tmp_buf is used as a temporary buffer by serial_write.  We need to
 * lock it in case the copy_from_user blocks while swapping in a page,
 * and some other program tries to do a serial write at the same time.
 * Since the lock will only come under contention when the system is
 * swapping and available memory is low, it makes sense to share one
 * buffer across all the serial ports, since it significantly saves
 * memory if large numbers of serial ports are open.  This buffer is
 * allocated when the first cy_open occurs.
 */
static unsigned char *tmp_buf = 0;
static struct semaphore tmp_buf_sem = MUTEX;
 
/*
 * This is used to look up the divisor speeds and the timeouts
 * We're normally limited to 15 distinct baud rates.  The extra
 * are accessed via settings in info->flags.
 *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 *                                               HI            VHI
 *     20
 */
static int baud_table[] = {
       0,    50,    75,   110,   134,   150,   200,   300,   600,  1200,
    1800,  2400,  4800,  9600, 19200, 38400, 57600, 76800,115200,150000,
  230400,     0};
 
static char baud_co_25[] = {  /* 25 MHz clock option table */
    /* value =>    00    01   02    03    04 */
    /* divide by    8    32   128   512  2048 */
    0x00,  0x04,  0x04,  0x04,  0x04,  0x04,  0x03,  0x03,  0x03,  0x02,
    0x02,  0x02,  0x01,  0x01,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00};
 
static char baud_bpr_25[] = {  /* 25 MHz baud rate period table */
    0x00,  0xf5,  0xa3,  0x6f,  0x5c,  0x51,  0xf5,  0xa3,  0x51,  0xa3,
    0x6d,  0x51,  0xa3,  0x51,  0xa3,  0x51,  0x36,  0x29,  0x1b,  0x15};
 
static char baud_co_60[] = {  /* 60 MHz clock option table (CD1400 J) */
    /* value =>    00    01   02    03    04 */
    /* divide by    8    32   128   512  2048 */
    0x00,  0x00,  0x00,  0x04,  0x04,  0x04,  0x04,  0x04,  0x03,  0x03,
    0x03,  0x02,  0x02,  0x01,  0x01,  0x00,  0x00,  0x00,  0x00,  0x00,
    0x00};
 
static char baud_bpr_60[] = {  /* 60 MHz baud rate period table (CD1400 J) */
    0x00,  0x82,  0x21,  0xff,  0xdb,  0xc3,  0x92,  0x62,  0xc3,  0x62,
    0x41,  0xc3,  0x62,  0xc3,  0x62,  0xc3,  0x82,  0x62,  0x41,  0x32,
    0x21};
 
static char baud_cor3[] = {  /* receive threshold */
    0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,
    0x0a,  0x0a,  0x0a,  0x09,  0x09,  0x08,  0x08,  0x08,  0x08,  0x07,
    0x07};
 
/*
 * The Cyclades driver implements HW flow control as any serial driver.
 * The cyclades_port structure member rflow and the vector rflow_thr
 * allows us to take advantage of a special feature in the CD1400 to avoid
 * data loss even when the system interrupt latency is too high. These flags
 * are to be used only with very special applications. Setting these flags
 * requires the use of a special cable (DTR and RTS reversed). In the new
 * CD1400-based boards (rev. 6.00 or later), there is no need for special
 * cables.
 */
 
static char rflow_thr[] = {  /* rflow threshold */
    0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
    0x00,  0x00,  0x00,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,
    0x0a};
 
/*  The Cyclom-Ye has placed the sequential chips in non-sequential
 *  address order.  This look-up table overcomes that problem.
 */
static int cy_chip_offset [] =
    { 0x0000,
      0x0400,
      0x0800,
      0x0C00,
      0x0200,
      0x0600,
      0x0A00,
      0x0E00
    };
 
/* PCI related definitions */
 
static unsigned short   cy_pci_nboard = 0;
static unsigned short   cy_isa_nboard = 0;
static unsigned short   cy_nboard = 0;
static unsigned short   cy_pci_dev_id[] = {
                            PCI_DEVICE_ID_CYCLOM_Y_Lo,  /* PCI < 1Mb */
                            PCI_DEVICE_ID_CYCLOM_Y_Hi,  /* PCI > 1Mb */
                            PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
                            PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
                            PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
                            PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
                            PCI_DEVICE_ID_CYCLOM_Z_Lo,  /* Z PCI < 1Mb */
                            PCI_DEVICE_ID_CYCLOM_Z_Hi,  /* Z PCI > 1Mb */
 
                        };
 
 
static void cy_start(struct tty_struct *);
static void set_line_char(struct cyclades_port *);
static void cy_probe(int, void *, struct pt_regs *);
static void cyz_poll(unsigned long);
#ifdef CY_SHOW_STATUS
static void show_status(int);
#endif
 
#if defined(CONFIG_PROC_FS) && !defined(MODULE)
static int cyclades_get_proc_info(char *, char **, off_t, int, int);
static struct proc_dir_entry cyclades_proc_entry = {
        0,
        8,
        "cyclades",
        S_IFREG | S_IRUGO,
        1,
        0,
        0,
        0,
        0,
        cyclades_get_proc_info
};
#endif
 
/* The Cyclades-Z polling cycle is defined by this variable */
static long cyz_polling_cycle = CZ_DEF_POLL;
 
static int cyz_timeron = 0;
static struct timer_list
cyz_timerlist = {
    NULL, NULL, 0, 0, cyz_poll
};
 
/**************************************************
error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned long));
copy_to_user  (to, from, count);
***************************************************************
error = verify_area(VERIFY_READ,  (void *) arg, sizeof(unsigned long *));
copy_from_user(to, from, count);
**************************************************/
 
 
static inline int
serial_paranoia_check(struct cyclades_port *info,
                        kdev_t device, const char *routine)
{
#ifdef SERIAL_PARANOIA_CHECK
    static const char *badmagic =
        "cyc Warning: bad magic number for serial struct (%s) in %s\n";
    static const char *badinfo =
        "cyc Warning: null cyclades_port for (%s) in %s\n";
    static const char *badrange =
        "cyc Warning: cyclades_port out of range for (%s) in %s\n";
 
    if (!info) {
        printk(badinfo, kdevname(device), routine);
        return 1;
    }
 
    if( (long)info < (long)(&cy_port[0])
    || (long)(&cy_port[NR_PORTS]) < (long)info ){
        printk(badrange, kdevname(device), routine);
        return 1;
    }
 
    if (info->magic != CYCLADES_MAGIC) {
        printk(badmagic, kdevname(device), routine);
        return 1;
    }
#endif
        return 0;
} /* serial_paranoia_check */
 
 
/* The following diagnostic routines allow the driver to spew
   information on the screen, even (especially!) during interrupts.
 */
static void
SP(char *data){
  unsigned long flags;
    save_flags(flags); cli();
        console_print(data);
    restore_flags(flags);
}/* SP */
 
static void
CP(char data){
  unsigned long flags;
  char scrn[2];
    save_flags(flags); cli();
        scrn[0] = data;
        scrn[1] = '\0';
        console_print(scrn);
    restore_flags(flags);
}/* CP */
 
static void CP4(int data)
    { (data<10)?  CP(data+'0'): CP(data+'A'-10); }/* CP4 */
static void CP8(int data)
    { CP4((data>>4) & 0x0f); CP4( data & 0x0f); }/* CP8 */
#if 0
static void CP16(int data)
    { CP8((data>>8) & 0xff); CP8(data & 0xff); }/* CP16 */
static void CP32(long data)
    { CP16((data>>16) & 0xffff); CP16(data & 0xffff); }/* CP32 */
#endif
 
 
/*
 * This routine is used by the interrupt handler to schedule
 * processing in the software interrupt portion of the driver
 * (also known as the "bottom half").  This can be called any
 * number of times for any channel without harm.
 */
static inline void
cy_sched_event(struct cyclades_port *info, int event)
{
    info->event |= 1 << event; /* remember what kind of event and who */
    queue_task(&info->tqueue, &tq_cyclades); /* it belongs to */
    mark_bh(CYCLADES_BH);                       /* then trigger event */
} /* cy_sched_event */
 
 
/*
 * This routine is used to handle the "bottom half" processing for the
 * serial driver, known also the "software interrupt" processing.
 * This processing is done at the kernel interrupt level, after the
 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 * is where time-consuming activities which can not be done in the
 * interrupt driver proper are done; the interrupt driver schedules
 * them using cy_sched_event(), and they get done here.
 *
 * This is done through one level of indirection--the task queue.
 * When a hardware interrupt service routine wants service by the
 * driver's bottom half, it enqueues the appropriate tq_struct (one
 * per port) to the tq_cyclades work queue and sets a request flag
 * via mark_bh for processing that queue.  When the time is right,
 * do_cyclades_bh is called (because of the mark_bh) and it requests
 * that the work queue be processed.
 *
 * Although this may seem unwieldy, it gives the system a way to
 * pass an argument (in this case the pointer to the cyclades_port
 * structure) to the bottom half of the driver.  Previous kernels
 * had to poll every port to see if that port needed servicing.
 */
static void
do_cyclades_bh(void)
{
    run_task_queue(&tq_cyclades);
} /* do_cyclades_bh */
 
static void
do_softint(void *private_)
{
  struct cyclades_port *info = (struct cyclades_port *) private_;
  struct tty_struct    *tty;
 
    tty = info->tty;
    if (!tty)
        return;
 
    if (clear_bit(Cy_EVENT_HANGUP, &info->event)) {
        tty_hangup(info->tty);
        wake_up_interruptible(&info->open_wait);
        info->flags &= ~(ASYNC_NORMAL_ACTIVE|
                             ASYNC_CALLOUT_ACTIVE);
    }
    if (clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
        wake_up_interruptible(&info->open_wait);
    }
    if (clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
        if((tty->flags & (1<< TTY_DO_WRITE_WAKEUP))
        && tty->ldisc.write_wakeup){
            (tty->ldisc.write_wakeup)(tty);
        }
        wake_up_interruptible(&tty->write_wait);
    }
#ifdef Z_WAKE
    if (clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
        wake_up_interruptible(&info->shutdown_wait);
    }
#endif
} /* do_softint */
 
 
/***********************************************************/
/********* Start of block of Cyclom-Y specific code ********/
 
/* This routine waits up to 1000 micro-seconds for the previous
   command to the Cirrus chip to complete and then issues the
   new command.  An error is returned if the previous command
   didn't finish within the time limit.
 */
static int
cyy_issue_cmd(volatile ucchar *base_addr, u_char cmd, int index)
{
  unsigned long flags;
  volatile int  i;
 
    save_flags(flags); cli();
        /* Check to see that the previous command has completed */
        for(i = 0 ; i < 100 ; i++){
            if (cy_readb(base_addr+(CyCCR<<index)) == 0){
                break;
            }
            udelay(10L);
        }
        /* if the CCR never cleared, the previous command
            didn't finish within the "reasonable time" */
        if ( i == 100 ) {
            restore_flags(flags);
            return (-1);
        }
 
        /* Issue the new command */
        cy_writeb((u_long)base_addr+(CyCCR<<index), cmd);
    restore_flags(flags);
    return(0);
} /* cyy_issue_cmd */
 
static int probe_ready;
 
/*
 * Grab all interrupts in preparation for doing an automatic irq
 * detection.  dontgrab is a mask of irq's _not_ to grab.  Returns a
 * mask of irq's which were grabbed and should therefore be freed
 * using free_all_interrupts().
 */
static int
grab_all_interrupts(int dontgrab)
{
  int irq_lines = 0;
  int i, mask;
 
    for (i = 0, mask = 1; i < 16; i++, mask <<= 1) {
        if (!(mask & dontgrab)
        && !request_irq(i, cy_probe,
                     SA_INTERRUPT, "serial probe", NULL)) {
            irq_lines |= mask;
        }
    }
    return irq_lines;
} /* grab_all_interrupts */
 
/*
 * Release all interrupts grabbed by grab_all_interrupts
 */
static void
free_all_interrupts(int irq_lines)
{
  int i;
 
    for (i = 0; i < 16; i++) {
        if (irq_lines & (1 << i)) {
            free_irq(i,NULL);
        }
    }
} /* free_all_interrupts */
 
/*
 * This routine returns a bitfield of "wild interrupts".  Basically,
 * any unclaimed interrupts which is flapping around.
 */
static int
check_wild_interrupts(void)
{
  int   i, mask;
  int   wild_interrupts = 0;
  int   irq_lines;
  unsigned long timeout;
  unsigned long flags;
 
    /*Turn on interrupts (they may be off) */
    save_flags(flags); sti();
 
        irq_lines = grab_all_interrupts(0);
 
        /*
         * Delay for 0.1 seconds -- we use a busy loop since this may
         * occur during the bootup sequence
         */
        timeout = jiffies+(HZ/10);
        while (timeout >= jiffies)
            ;
 
        cy_triggered = 0;       /* Reset after letting things settle */
 
        timeout = jiffies+(HZ/10);
        while (timeout >= jiffies)
                ;
 
        for (i = 0, mask = 1; i < 16; i++, mask <<= 1) {
            if ((cy_triggered & (1 << i)) &&
                (irq_lines & (1 << i))) {
                    wild_interrupts |= mask;
            }
        }
        free_all_interrupts(irq_lines);
    restore_flags(flags);
    return wild_interrupts;
} /* check_wild_interrupts */
 
/*
 * This routine is called by do_auto_irq(); it attempts to determine
 * which interrupt a serial port is configured to use.  It is not
 * fool-proof, but it works a large part of the time.
 */
static int
get_auto_irq(volatile ucchar *address)
{
  unsigned long         timeout;
  volatile ucchar       *base_addr;
  int                   index;
  unsigned long         flags;
 
    index = 0;  /* IRQ probing is only for ISA */
    base_addr = address;
    intr_base_addr = address;
 
    /*
     * Enable interrupts and see who answers
     */
    cy_irq_triggered = 0;
    save_flags(flags); cli();
        cy_writeb((u_long)base_addr+(CyCAR<<index), 0);
        cyy_issue_cmd(base_addr,CyCHAN_CTL|CyENB_XMTR,index);
        cy_writeb((u_long)base_addr+(CySRER<<index),
             cy_readb(base_addr+(CySRER<<index)) | CyTxMpty);
        probe_ready = 1;
    restore_flags(flags);
 
    timeout = jiffies+(HZ/50);
    while (timeout >= jiffies) {
        if (cy_irq_triggered)
            break;
    }
    probe_ready = 0;
    return(cy_irq_triggered);
} /* get_auto_irq */
 
/*
 * Calls get_auto_irq() multiple times, to make sure we don't get
 * faked out by random interrupts
 */
static int
do_auto_irq(volatile ucchar *address)
{
  int                   irq_lines = 0;
  int                   irq_try_1 = 0, irq_try_2 = 0;
  int                   retries;
  unsigned long         flags;
 
    /* Turn on interrupts (they may be off) */
    save_flags(flags); sti();
 
        probe_ready = 0;
 
        cy_wild_int_mask = check_wild_interrupts();
 
        irq_lines = grab_all_interrupts(cy_wild_int_mask);
 
        for (retries = 0; retries < 5; retries++) {
            if (!irq_try_1)
                irq_try_1 = get_auto_irq(address);
            if (!irq_try_2)
                irq_try_2 = get_auto_irq(address);
            if (irq_try_1 && irq_try_2) {
                if (irq_try_1 == irq_try_2)
                    break;
                irq_try_1 = irq_try_2 = 0;
            }
        }
    restore_flags(flags);
    free_all_interrupts(irq_lines);
    return (irq_try_1 == irq_try_2) ? irq_try_1 : 0;
} /* do_auto_irq */
 
 
/*
 * This interrupt routine is used
 * while we are probing for submarines.
 */
static void
cy_probe(int irq, void *dev_id, struct pt_regs *regs)
{
  int save_xir, save_car;
  int index = 0;        /* probing interrupts is only for ISA */
 
    if (!probe_ready) {
        cy_writeb((u_long)intr_base_addr+(Cy_ClrIntr<<index), 0);
        return;
    }
 
    cy_irq_triggered = irq;
    cy_triggered |= 1 << irq;
 
        if(cy_readb(intr_base_addr+(CySVRR<<index)) != 0) {
            save_xir = (u_char) cy_readb(intr_base_addr+(CyTIR<<index));
            save_car = cy_readb(intr_base_addr+(CyCAR<<index));
            if ((save_xir & 0x3) != 0){
                SP("channel ");
                CP8(save_xir);
                SP(" requesting unexpected interrupt\n");
            }
            cy_writeb((u_long)intr_base_addr+(CyCAR<<index), (save_xir & 0x3));
            cy_writeb((u_long)intr_base_addr+(CySRER<<index),
                cy_readb(intr_base_addr+(CySRER<<index)) & ~CyTxMpty);
            cy_writeb((u_long)intr_base_addr+(CyTIR<<index), (save_xir & 0x3f));
            cy_writeb((u_long)intr_base_addr+(CyCAR<<index), (save_car));
        }
        cy_writeb((u_long)intr_base_addr+(Cy_ClrIntr<<index), 0);
                                  /* Cy_ClrIntr is 0x1800 */
    return;
} /* cy_probe */
 
/* The real interrupt service routine is called
   whenever the card wants its hand held--chars
   received, out buffer empty, modem change, etc.
 */
static void
cyy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
  struct tty_struct *tty;
  int status;
  struct cyclades_card *cinfo;
  struct cyclades_port *info;
  volatile unsigned char *base_addr, *card_base_addr;
  int chip;
  int save_xir, channel, save_car;
  char data;
  volatile int char_count;
  int outch;
  int i,j,index;
  int too_many;
  int had_work;
  int mdm_change;
  int mdm_status;
 
    if((cinfo = IRQ_cards[irq]) == 0){
#ifdef CY_DEBUG_INTERRUPTS
printk("cy_interrupt: spurious interrupt %d\n\r", irq);
#endif
        return; /* spurious interrupt */
    }
 
    card_base_addr = (unsigned char *)cinfo->base_addr;
    index = cinfo->bus_index;
 
 
    /* This loop checks all chips in the card.  Make a note whenever
       _any_ chip had some work to do, as this is considered an
       indication that there will be more to do.  Only when no chip
       has any work does this outermost loop exit.
     */
    do{
        had_work = 0;
        for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) {
            base_addr = (unsigned char *)
                       (cinfo->base_addr + (cy_chip_offset[chip]<<index));
            too_many = 0;
            while ( (status = cy_readb(base_addr+(CySVRR<<index))) != 0x00) {
                had_work++;
                /* The purpose of the following test is to ensure that
                   no chip can monopolize the driver.  This forces the
                   chips to be checked in a round-robin fashion (after
                   draining each of a bunch (1000) of characters).
                 */
                if(1000<too_many++){
                    break;
                }
                if (status & CySRReceive) { /* reception interrupt */
#ifdef CY_DEBUG_INTERRUPTS
printk("cy_interrupt: rcvd intr, chip %d\n\r", chip);
#endif
                    /* determine the channel & change to that context */
                    save_xir = (u_char) cy_readb(base_addr+(CyRIR<<index));
                    channel = (u_short ) (save_xir & CyIRChannel);
                    i = channel + chip * 4 + cinfo->first_line;
                    info = &cy_port[i];
                    info->last_active = jiffies;
                    save_car = cy_readb(base_addr+(CyCAR<<index));
                    cy_writeb((u_long)base_addr+(CyCAR<<index), save_xir);
 
                    /* if there is nowhere to put the data, discard it */
                    if(info->tty == 0){
                        j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
                        if ( j == CyIVRRxEx ) { /* exception */
                            data = cy_readb(base_addr+(CyRDSR<<index));
                        } else { /* normal character reception */
                            char_count = cy_readb(base_addr+(CyRDCR<<index));
                            while(char_count--){
                                data = cy_readb(base_addr+(CyRDSR<<index));
                            }
                        }
                    }else{ /* there is an open port for this data */
                        tty = info->tty;
                        j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
                        if ( j == CyIVRRxEx ) { /* exception */
                            data = cy_readb(base_addr+(CyRDSR<<index));
                            if(data & info->ignore_status_mask){
                                continue;
                            }
                            if (tty->flip.count < TTY_FLIPBUF_SIZE){
                                tty->flip.count++;
                                if (data & info->read_status_mask){
                                    if(data & CyBREAK){
                                        *tty->flip.flag_buf_ptr++ =
                                                            TTY_BREAK;
                                        *tty->flip.char_buf_ptr++ =
                                          cy_readb(base_addr+(CyRDSR<<index));
                                        if (info->flags & ASYNC_SAK){
                                            do_SAK(tty);
                                        }
                                    }else if(data & CyFRAME){
                                        *tty->flip.flag_buf_ptr++ =
                                                            TTY_FRAME;
                                        *tty->flip.char_buf_ptr++ =
                                          cy_readb(base_addr+(CyRDSR<<index));
                                        info->idle_stats.frame_errs++;
                                    }else if(data & CyPARITY){
                                        *tty->flip.flag_buf_ptr++ =
                                                            TTY_PARITY;
                                        *tty->flip.char_buf_ptr++ =
                                          cy_readb(base_addr+(CyRDSR<<index));
                                        info->idle_stats.parity_errs++;
                                    }else if(data & CyOVERRUN){
                                        *tty->flip.flag_buf_ptr++ =
                                                            TTY_OVERRUN;
                                        *tty->flip.char_buf_ptr++ = 0;
                                        /* If the flip buffer itself is
                                           overflowing, we still loose
                                           the next incoming character.
                                         */
                                        if(tty->flip.count
                                                   < TTY_FLIPBUF_SIZE){
                                            tty->flip.count++;
                                            *tty->flip.flag_buf_ptr++ =
                                                             TTY_NORMAL;
                                           *tty->flip.char_buf_ptr++ =
                                            cy_readb(base_addr+(CyRDSR<<index));
                                        }
                                        info->idle_stats.overruns++;
                                    /* These two conditions may imply */
                                    /* a normal read should be done. */
                                    /* }else if(data & CyTIMEOUT){ */
                                    /* }else if(data & CySPECHAR){ */
                                    }else{
                                        *tty->flip.flag_buf_ptr++ = 0;
                                        *tty->flip.char_buf_ptr++ = 0;
                                    }
                                }else{
                                    *tty->flip.flag_buf_ptr++ = 0;
                                    *tty->flip.char_buf_ptr++ = 0;
                                }
                            }else{
                                /* there was a software buffer
                                   overrun and nothing could be
                                   done about it!!! */
                                info->idle_stats.overruns++;
                            }
                        } else { /* normal character reception */
                            /* load # chars available from the chip */
                            char_count = cy_readb(base_addr+(CyRDCR<<index));
 
#ifdef CY_ENABLE_MONITORING
                            ++info->mon.int_count;
                            info->mon.char_count += char_count;
                            if (char_count > info->mon.char_max)
                               info->mon.char_max = char_count;
                            info->mon.char_last = char_count;
#endif
                            info->idle_stats.recv_bytes += char_count;
                            info->idle_stats.recv_idle   = jiffies;
 
                            while(char_count--){
                                if (tty->flip.count >= TTY_FLIPBUF_SIZE){
                                        break;
                                }
                                tty->flip.count++;
                                data = cy_readb(base_addr+(CyRDSR<<index));
                                *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
                                *tty->flip.char_buf_ptr++ = data;
#ifdef CY_16Y_HACK
                                udelay(10L);
#endif
                            }
                        }
                        queue_task(&tty->flip.tqueue, &tq_timer);
                    }
                    /* end of service */
                    cy_writeb((u_long)base_addr+(CyRIR<<index), (save_xir & 0x3f));
                    cy_writeb((u_long)base_addr+(CyCAR<<index), (save_car));
                }
 
 
                if (status & CySRTransmit) { /* transmission interrupt */
                    /* Since we only get here when the transmit buffer
                       is empty, we know we can always stuff a dozen
                       characters. */
#ifdef CY_DEBUG_INTERRUPTS
printk("cy_interrupt: xmit intr, chip %d\n\r", chip);
#endif
 
                    /* determine the channel & change to that context */
                    save_xir = (u_char) cy_readb(base_addr+(CyTIR<<index));
                    channel = (u_short ) (save_xir & CyIRChannel);
                    i = channel + chip * 4 + cinfo->first_line;
                    save_car = cy_readb(base_addr+(CyCAR<<index));
                    cy_writeb((u_long)base_addr+(CyCAR<<index), save_xir);
 
                    /* validate the port# (as configured and open) */
                    if( (i < 0) || (NR_PORTS <= i) ){
                        cy_writeb((u_long)base_addr+(CySRER<<index),
                             cy_readb(base_addr+(CySRER<<index)) & ~CyTxMpty);
                        goto txend;
                    }
                    info = &cy_port[i];
                    info->last_active = jiffies;
                    if(info->tty == 0){
                        cy_writeb((u_long)base_addr+(CySRER<<index),
                             cy_readb(base_addr+(CySRER<<index)) & ~CyTxMpty);
                        goto txdone;
                    }
 
                    /* load the on-chip space for outbound data */
                    char_count = info->xmit_fifo_size;
 
 
                    if(info->x_char) { /* send special char */
                        outch = info->x_char;
                        cy_writeb((u_long)base_addr+(CyTDR<<index), outch);
                        char_count--;
                        info->x_char = 0;
                    }
 
                    if (info->x_break){
                        /*  The Cirrus chip requires the "Embedded
                            Transmit Commands" of start break, delay,
                            and end break sequences to be sent.  The
                            duration of the break is given in TICs,
                            which runs at HZ (typically 100) and the
                            PPR runs at 200 Hz, so the delay is
                            duration * 200/HZ, and thus a break can
                            run from 1/100 sec to about 5/4 sec.
                            For CD1400 J or later, replace the 200 Hz
                            by 500 Hz.
                         */
                        /* start break */
                        cy_writeb((u_long)base_addr + (CyTDR<<index), 0);
                        cy_writeb((u_long)base_addr + (CyTDR<<index), 0x81);
                        /* delay a bit */
                        cy_writeb((u_long)base_addr + (CyTDR<<index), 0);
                        cy_writeb((u_long)base_addr + (CyTDR<<index), 0x82);
                        if (info->chip_rev >= CD1400_REV_J ) {
                            /* It is a CD1400 rev. J or later */
                            cy_writeb((u_long)base_addr + (CyTDR<<index),
                                      info->x_break*500/HZ);
                        } else {
                            cy_writeb((u_long)base_addr + (CyTDR<<index),
                                      info->x_break*200/HZ);
                        }
                        /* finish break */
                        cy_writeb((u_long)base_addr + (CyTDR<<index), 0);
                        cy_writeb((u_long)base_addr + (CyTDR<<index), 0x83);
                        char_count -= 7;
                        info->x_break = 0;
                    }
 
                    while (char_count-- > 0){
                        if (!info->xmit_cnt){
                            cy_writeb((u_long)base_addr+(CySRER<<index),
                                cy_readb(base_addr+(CySRER<<index)) &
                                        ~CyTxMpty);
                            goto txdone;
                        }
                        if (info->xmit_buf == 0){
                            cy_writeb((u_long)base_addr+(CySRER<<index),
                                cy_readb(base_addr+(CySRER<<index)) &
                                        ~CyTxMpty);
                           goto txdone;
                        }
                        if (info->tty->stopped || info->tty->hw_stopped){
                            cy_writeb((u_long)base_addr+(CySRER<<index),
                                cy_readb(base_addr+(CySRER<<index)) &
                                        ~CyTxMpty);
                           goto txdone;
                        }
                        /* Because the Embedded Transmit Commands have
                           been enabled, we must check to see if the
                           escape character, NULL, is being sent.  If it
                           is, we must ensure that there is room for it
                           to be doubled in the output stream.  Therefore
                           we no longer advance the pointer when the
                           character is fetched, but rather wait until
                           after the check for a NULL output character.
                           This is necessary because there may not be
                           room for the two chars needed to send a NULL.)
                         */
                        outch = info->xmit_buf[info->xmit_tail];
                        if( outch ){
                            info->xmit_cnt--;
                            info->xmit_tail = (info->xmit_tail + 1)
                                                      & (SERIAL_XMIT_SIZE - 1);
                            cy_writeb((u_long)base_addr+(CyTDR<<index), outch);
                        }else{
                            if(char_count > 1){
                                info->xmit_cnt--;
                                info->xmit_tail = (info->xmit_tail + 1)
                                                      & (SERIAL_XMIT_SIZE - 1);
                                cy_writeb((u_long)base_addr+(CyTDR<<index),
                                          outch);
                                cy_writeb((u_long)base_addr+(CyTDR<<index), 0);
                                char_count--;
                            }else{
                            }
                        }
                    }
 
        txdone:
                    if (info->xmit_cnt < WAKEUP_CHARS) {
                        cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
                    }
        txend:
                    /* end of service */
                    cy_writeb((u_long)base_addr+(CyTIR<<index),
                              (save_xir & 0x3f));
                    cy_writeb((u_long)base_addr+(CyCAR<<index), (save_car));
                }
 
                if (status & CySRModem) {        /* modem interrupt */
 
                    /* determine the channel & change to that context */
                    save_xir = (u_char) cy_readb(base_addr+(CyMIR<<index));
                    channel = (u_short ) (save_xir & CyIRChannel);
                    info = &cy_port[channel + chip * 4
                                           + cinfo->first_line];
                    info->last_active = jiffies;
                    save_car = cy_readb(base_addr+(CyCAR<<index));
                    cy_writeb((u_long)base_addr+(CyCAR<<index), save_xir);
 
                    mdm_change = cy_readb(base_addr+(CyMISR<<index));
                    mdm_status = cy_readb(base_addr+(CyMSVR1<<index));
 
                    if(info->tty == 0){/* no place for data, ignore it*/
                        ;
                    }else{
                        if((mdm_change & CyDCD)
                        && (info->flags & ASYNC_CHECK_CD)){
                            if(mdm_status & CyDCD){
                                cy_sched_event(info,
                                    Cy_EVENT_OPEN_WAKEUP);
                            }else if(!((info->flags
                                        & ASYNC_CALLOUT_ACTIVE)
                                 &&(info->flags
                                    & ASYNC_CALLOUT_NOHUP))){
                                cy_sched_event(info,
                                    Cy_EVENT_HANGUP);
                            }
                        }
                        if((mdm_change & CyCTS)
                        && (info->flags & ASYNC_CTS_FLOW)){
                            if(info->tty->hw_stopped){
                                if(mdm_status & CyCTS){
                                    /* cy_start isn't used
                                         because... !!! */
                                    info->tty->hw_stopped = 0;
                                  cy_writeb((u_long)base_addr+(CySRER<<index),
                                       cy_readb(base_addr+(CySRER<<index)) |
                                       CyTxMpty);
                                    cy_sched_event(info,
                                        Cy_EVENT_WRITE_WAKEUP);
                                }
                            }else{
                                if(!(mdm_status & CyCTS)){
                                    /* cy_stop isn't used
                                         because ... !!! */
                                    info->tty->hw_stopped = 1;
                                  cy_writeb((u_long)base_addr+(CySRER<<index),
                                       cy_readb(base_addr+(CySRER<<index)) &
                                       ~CyTxMpty);
                                }
                            }
                        }
                        if(mdm_status & CyDSR){
                        }
                        if(mdm_status & CyRI){
                        }
                    }
                    /* end of service */
                    cy_writeb((u_long)base_addr+(CyMIR<<index),
                              (save_xir & 0x3f));
                    cy_writeb((u_long)base_addr+(CyCAR<<index), save_car);
                }
            }          /* end while status != 0 */
        }            /* end loop for chips... */
    } while(had_work);
 
   /* clear interrupts */
   cy_writeb((u_long)card_base_addr + (Cy_ClrIntr<<index), 0);
                                /* Cy_ClrIntr is 0x1800 */
} /* cyy_interrupt */
 
/***********************************************************/
/********* End of block of Cyclom-Y specific code **********/
/******** Start of block of Cyclades-Z specific code *********/
/***********************************************************/
 
 
static int
cyz_fetch_msg( struct cyclades_card *cinfo,
            uclong *channel, ucchar *cmd, uclong *param)
{
  struct FIRM_ID *firm_id;
  struct ZFW_CTRL *zfw_ctrl;
  struct BOARD_CTRL *board_ctrl;
  unsigned long loc_doorbell;
 
    firm_id = (struct FIRM_ID *)(cinfo->base_addr + ID_ADDRESS);
    if (!ISZLOADED(*cinfo)){
        return (-1);
    }
    zfw_ctrl = (struct ZFW_CTRL *)
               (cinfo->base_addr + cy_readl(&firm_id->zfwctrl_addr));
    board_ctrl = &zfw_ctrl->board_ctrl;
 
    loc_doorbell = cy_readl(&((struct RUNTIME_9060 *)
                     (cinfo->ctl_addr))->loc_doorbell);
    if (loc_doorbell){
        *cmd = (char)(0xff & loc_doorbell);
        *channel = cy_readl(&board_ctrl->fwcmd_channel);
        *param = (uclong)cy_readl(&board_ctrl->fwcmd_param);
        cy_writel(&((struct RUNTIME_9060 *)(cinfo->ctl_addr))->loc_doorbell,
                 0xffffffff);
        return 1;
    }
    return 0;
} /* cyz_fetch_msg */
 
 
static int
cyz_issue_cmd( struct cyclades_card *cinfo,
            uclong channel, ucchar cmd, uclong param)
{
  struct FIRM_ID *firm_id;
  struct ZFW_CTRL *zfw_ctrl;
  struct BOARD_CTRL *board_ctrl;
  volatile uclong *pci_doorbell;
  int index;
 
    firm_id = (struct FIRM_ID *)(cinfo->base_addr + ID_ADDRESS);
    if (!ISZLOADED(*cinfo)){
        return (-1);
    }
    zfw_ctrl = (struct ZFW_CTRL *)
               (cinfo->base_addr + cy_readl(&firm_id->zfwctrl_addr));
    board_ctrl = &zfw_ctrl->board_ctrl;
 
    index = 0;
    pci_doorbell = (uclong *)(&((struct RUNTIME_9060 *)
                               (cinfo->ctl_addr))->pci_doorbell);
    while( (cy_readl(pci_doorbell) & 0xff) != 0){
        if (index++ == 1000){
            return(-1);
        }
        udelay(50L);
    }
    cy_writel((u_long)&board_ctrl->hcmd_channel, channel);
    cy_writel((u_long)&board_ctrl->hcmd_param , param);
    cy_writel((u_long)pci_doorbell, (long)cmd);
 
    return(0);
} /* cyz_issue_cmd */
 
 
#if 0
static int
cyz_update_channel( struct cyclades_card *cinfo,
            u_long channel, u_char mode, u_char cmd)
{
  struct FIRM_ID *firm_id =
      (struct FIRM_ID *)(cinfo->base_addr + ID_ADDRESS);
  struct ZFW_CTRL *zfw_ctrl;
  struct CH_CTRL *ch_ctrl;
 
    if (!ISZLOADED(*cinfo)){
        return (-1);
    }
    zfw_ctrl = (struct ZFW_CTRL *)
               (cinfo->base_addr + cy_readl(&firm_id->zfwctrl_addr));
    ch_ctrl = zfw_ctrl->ch_ctrl;
 
    cy_writel(&ch_ctrl[channel].op_mode, (uclong)mode);
 
    return cyz_issue_cmd(cinfo, channel, cmd, 0L);
 
} /* cyz_update_channel */
#endif
 
 
static void
cyz_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
} /* cyz_interrupt */
 
 
static void
cyz_poll(unsigned long arg)
{
  static volatile struct FIRM_ID *firm_id;
  static volatile struct ZFW_CTRL *zfw_ctrl;
  static volatile struct BOARD_CTRL *board_ctrl;
  static volatile struct CH_CTRL *ch_ctrl;
  static volatile struct BUF_CTRL *buf_ctrl;
  struct cyclades_card *cinfo;
  struct cyclades_port *info;
  struct tty_struct *tty;
  int card, port;
  int char_count;
#ifdef BLOCKMOVE
  int small_count;
#endif
  char data;
  uclong channel;
  ucchar cmd;
  uclong param;
  uclong hw_ver, fw_ver;
  volatile uclong tx_put, tx_get, tx_bufsize;
  volatile uclong rx_put, rx_get, rx_bufsize;
 
    cyz_timerlist.expires = jiffies + (HZ);
    for (card = 0 ; card < NR_CARDS ; card++){
        cinfo = &cy_card[card];
        if (!IS_CYC_Z(*cinfo)) continue;
 
 
        firm_id = (struct FIRM_ID *)(cinfo->base_addr + ID_ADDRESS);
        if (!ISZLOADED(*cinfo)) {
            cinfo->inact_ctrl = 0;
            continue;
        }
 
        zfw_ctrl = (struct ZFW_CTRL *)
                   (cinfo->base_addr + cy_readl(&firm_id->zfwctrl_addr));
        board_ctrl = &(zfw_ctrl->board_ctrl);
        fw_ver = cy_readl(&board_ctrl->fw_version);
        hw_ver = cy_readl(&((struct RUNTIME_9060 *)
                            (cinfo->ctl_addr))->mail_box_0);
 
        /* Enables the firmware inactivity control */
        if ((fw_ver > 0x00000310L) && (!cinfo->inact_ctrl)) {
            param = cyz_issue_cmd( &cy_card[card], 0L, C_CM_TINACT, 0L);
            cinfo->inact_ctrl = 1;
        }
 
        while(cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1){
            char_count = 0;
            info = &cy_port[ channel + cinfo->first_line ];
            if((tty = info->tty) == 0) continue;
            ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
            buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
            info->jiffies[0] = jiffies;
 
            switch(cmd){
            case C_CM_PR_ERROR:
                tty->flip.count++;
                *tty->flip.flag_buf_ptr++ = TTY_PARITY;
                *tty->flip.char_buf_ptr++ = 0;
                char_count++;
                break;
            case C_CM_FR_ERROR:
                tty->flip.count++;
                *tty->flip.flag_buf_ptr++ = TTY_FRAME;
                *tty->flip.char_buf_ptr++ = 0;
                char_count++;
                break;
            case C_CM_RXBRK:
                tty->flip.count++;
                *tty->flip.flag_buf_ptr++ = TTY_BREAK;
                *tty->flip.char_buf_ptr++ = 0;
                char_count++;
                break;
            case C_CM_MDCD:
                if (info->flags & ASYNC_CHECK_CD){
                    if ((fw_ver > 241 ?
                          ((u_long)param) :
                          cy_readl(&ch_ctrl[channel].rs_status)) & C_RS_DCD) {
                        /* SP("Open Wakeup\n"); */
                        cy_sched_event(info,
                            Cy_EVENT_OPEN_WAKEUP);
                    }else if(!((info->flags
                                & ASYNC_CALLOUT_ACTIVE)
                         &&(info->flags
                            & ASYNC_CALLOUT_NOHUP))){
                        /* SP("Hangup\n"); */
                        cy_sched_event(info,
                            Cy_EVENT_HANGUP);
                    }
                }
                break;
            case C_CM_MCTS:
                if (info->flags & ASYNC_CTS_FLOW) {
                    if(info->tty->hw_stopped){
                        if( cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD){
                            /* cy_start isn't used because...
                               HW flow is handled by the board */
                            /* SP("Write Wakeup\n"); */
                            cy_sched_event(info,
                                Cy_EVENT_WRITE_WAKEUP);
                        }
                    }else{
                        if(!(cy_readl(&ch_ctrl[channel].rs_status) & C_RS_CTS)){
                            /* cy_stop isn't used because
                               HW flow is handled by the board */
                            /* SP("Write stop\n"); */
                        }
                    }
                }
                break;
            case C_CM_MRI:
                break;
            case C_CM_MDSR:
                break;
#ifdef Z_WAKE
            case C_CM_IOCTLW:
                cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
                break;
#endif
            case C_CM_FATAL:
                /* should do something with this !!! */
                break;
            }
            if(char_count){
                queue_task(&tty->flip.tqueue, &tq_timer);
            }
        }
        for (port = 0; port < cy_readl(&board_ctrl->n_channel); port++){
            info = &cy_port[ port + cinfo->first_line ];
            tty = info->tty;
            ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
            buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
 
/* Removed due to compilation problems in Alpha systems */
//          if ((char_count = CHARS_IN_BUF(buf_ctrl))){
 
            rx_get = cy_readl(&buf_ctrl->rx_get);
            rx_put = cy_readl(&buf_ctrl->rx_put);
            rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
            if (rx_put >= rx_get)
                char_count = rx_put - rx_get;
            else
                char_count = rx_put - rx_get + rx_bufsize;
 
            if ( char_count ){
 
                info->last_active = jiffies;
                info->jiffies[1] = jiffies;
 
#ifdef CY_ENABLE_MONITORING
                info->mon.int_count++;
                info->mon.char_count += char_count;
                if (char_count > info->mon.char_max)
                   info->mon.char_max = char_count;
                info->mon.char_last = char_count;
#endif
                info->idle_stats.recv_bytes += char_count;
                info->idle_stats.recv_idle   = jiffies;
                if( tty == 0){
                    /* flush received characters */
                    rx_get = (rx_get + char_count) & (rx_bufsize - 1);
                    /* SP("-"); */
                    info->rflush_count++;
                }else{
#ifdef BLOCKMOVE
                /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
                   for performance, but because of buffer boundaries, there
                   may be several steps to the operation */
                    while(0 < (small_count
                        = cy_min((rx_bufsize - rx_get),
                                 cy_min((TTY_FLIPBUF_SIZE - tty->flip.count),
                                        char_count)))){
 
                        memcpy_fromio(tty->flip.char_buf_ptr,
                                      (char *)(cinfo->base_addr
                                       + cy_readl(&buf_ctrl->rx_bufaddr)
                                       + rx_get),
                                      small_count);
 
                        tty->flip.char_buf_ptr += small_count;
                        memset(tty->flip.flag_buf_ptr,
                               TTY_NORMAL,
                               small_count);
                        tty->flip.flag_buf_ptr += small_count;
                        rx_get = (rx_get + small_count) & (rx_bufsize - 1);
                        char_count -= small_count;
                        tty->flip.count += small_count;
                    }
#else
                    while(char_count--){
                        if (tty->flip.count >= TTY_FLIPBUF_SIZE){
                                break;
                        }
                        data = cy_readb(cinfo->base_addr +
                                   cy_readl(&buf_ctrl->rx_bufaddr) + rx_get);
                        rx_get = (rx_get + 1) & (rx_bufsize - 1);
                        tty->flip.count++;
                        *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
                        *tty->flip.char_buf_ptr++ = data;
                    }
#endif
                    queue_task(&tty->flip.tqueue, &tq_timer);
                }
                /* Update rx_get */
                cy_writel(&buf_ctrl->rx_get, rx_get);
            }
 
/* Removed due to compilation problems in Alpha systems */
//          if ((char_count = SPACE_IN_BUF(buf_ctrl))){
 
            tx_get = cy_readl(&buf_ctrl->tx_get);
            tx_put = cy_readl(&buf_ctrl->tx_put);
            tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
            if (tx_put >= tx_get)
                char_count = tx_get - tx_put - 1 + tx_bufsize;
            else
                char_count = tx_get - tx_put - 1;
 
            if ( char_count ){
 
                if( tty == 0 ){
                    goto ztxdone;
                }
 
                if(info->x_char) { /* send special char */
                    data = info->x_char;
 
                    cy_writeb((cinfo->base_addr +
                              cy_readl(&buf_ctrl->tx_bufaddr) + tx_put), data);
                    tx_put = (tx_put + 1) & (tx_bufsize - 1);
                    info->x_char = 0;
                    char_count--;
                    info->last_active = jiffies;
                    info->jiffies[2] = jiffies;
                }
                if (info->x_break){
                    printk("cyc cyz_poll shouldn't see x_break\n");
                    info->x_break = 0;
                    info->last_active = jiffies;
                    info->jiffies[2] = jiffies;
                }
#ifdef BLOCKMOVE
                while(0 < (small_count
                    = cy_min((tx_bufsize - tx_put),
                             cy_min ((SERIAL_XMIT_SIZE - info->xmit_tail),
                                     cy_min(info->xmit_cnt, char_count))))){
 
                    memcpy_toio((char *)(cinfo->base_addr
                                 + cy_readl(&buf_ctrl->tx_bufaddr) + tx_put),
                                &info->xmit_buf[info->xmit_tail],
                                small_count);
 
                    tx_put = (tx_put + small_count) & (tx_bufsize - 1);
                    char_count -= small_count;
                    info->xmit_cnt -= small_count;
                    info->xmit_tail =
                       (info->xmit_tail + small_count) & (SERIAL_XMIT_SIZE - 1);
                    info->last_active = jiffies;
                    info->jiffies[2] = jiffies;
                }
#else
                while (info->xmit_cnt && char_count){
                    data = info->xmit_buf[info->xmit_tail];
                    info->xmit_cnt--;
                    info->xmit_tail =
                        (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
 
                    cy_writeb(cinfo->base_addr +
                              cy_readl(&buf_ctrl->tx_bufaddr) + tx_put,
                              data);
                    tx_put = (tx_put + 1) & (tx_bufsize - 1);
                    char_count--;
                    info->last_active = jiffies;
                    info->jiffies[2] = jiffies;
                }
 
#endif
            ztxdone:
                if (info->xmit_cnt < WAKEUP_CHARS) {
                    cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
                }
                /* Update tx_put */
                cy_writel(&buf_ctrl->tx_put, tx_put);
            }
        }
        /* poll every 40 ms */
        cyz_timerlist.expires = jiffies + cyz_polling_cycle;
 
        /* refresh inactivity counter */
        if (cinfo->inact_ctrl) {
                cy_writel(&board_ctrl->inactivity, (uclong) ZF_TINACT);
        }
    }
    add_timer(&cyz_timerlist);
 
    return;
} /* cyz_poll */
 
 
/********** End of block of Cyclades-Z specific code *********/
/***********************************************************/
 
 
/* This is called whenever a port becomes active;
   interrupts are enabled and DTR & RTS are turned on.
 */
static int
startup(struct cyclades_port * info)
{
  unsigned long flags;
  unsigned char *base_addr;
  int card,chip,channel,index;
 
    if (info->flags & ASYNC_INITIALIZED){
        return 0;
    }
 
    if (!info->type){
        if (info->tty){
            set_bit(TTY_IO_ERROR, &info->tty->flags);
        }
        return 0;
    }
    if (!info->xmit_buf){
        info->xmit_buf = (unsigned char *) get_free_page (GFP_KERNEL);
        if (!info->xmit_buf){
            return -ENOMEM;
        }
    }
 
    set_line_char(info);
 
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                   (cy_card[card].base_addr + (cy_chip_offset[chip]<<index));
 
#ifdef CY_DEBUG_OPEN
        printk("cyc startup card %d, chip %d, channel %d, base_addr %lx\n",
             card, chip, channel, (long)base_addr);/**/
#endif
 
        save_flags(flags); cli();
            cy_writeb((ulong)base_addr+(CyCAR<<index), (u_char)channel);
 
            cy_writeb((ulong)base_addr+(CyRTPR<<index), (info->default_timeout
                                 ? info->default_timeout
                                 : 0x02)); /* 10ms rx timeout */
 
            cyy_issue_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR,index);
 
            cy_writeb((ulong)base_addr+(CyCAR<<index), (u_char)channel);
            cy_writeb((ulong)base_addr+(CyMSVR1<<index), CyRTS);
            cy_writeb((ulong)base_addr+(CyMSVR2<<index), CyDTR);
 
#ifdef CY_DEBUG_DTR
            printk("cyc:startup raising DTR\n");
            printk("     status: 0x%x, 0x%x\n",
                   cy_readb(base_addr+(CyMSVR1<<index)),
                   cy_readb(base_addr+(CyMSVR2<<index)));
#endif
 
            cy_writeb((u_long)base_addr+(CySRER<<index),
               cy_readb(base_addr+(CySRER<<index)) | CyRxData);
            info->flags |= ASYNC_INITIALIZED;
 
            if (info->tty){
                clear_bit(TTY_IO_ERROR, &info->tty->flags);
            }
            info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
            memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
            info->idle_stats.in_use    =
            info->idle_stats.recv_idle =
            info->idle_stats.xmit_idle = jiffies;
        restore_flags(flags);
    } else {
      struct FIRM_ID *firm_id;
      struct ZFW_CTRL *zfw_ctrl;
      struct BOARD_CTRL *board_ctrl;
      struct CH_CTRL *ch_ctrl;
      int retval;
 
        base_addr = (unsigned char*) (cy_card[card].base_addr);
 
        firm_id = (struct FIRM_ID *) (base_addr + ID_ADDRESS);
        if (!ISZLOADED(cy_card[card])){
            return -ENODEV;
        }
 
        zfw_ctrl =
            (struct ZFW_CTRL *)
                (cy_card[card].base_addr + cy_readl(&firm_id->zfwctrl_addr));
        board_ctrl = &zfw_ctrl->board_ctrl;
        ch_ctrl = zfw_ctrl->ch_ctrl;
 
#ifdef CY_DEBUG_OPEN
        printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
             card, channel, (long)base_addr);/**/
#endif
 
        cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
#ifdef Z_WAKE
        cy_writel(&ch_ctrl[channel].intr_enable,
                  C_IN_MDCD|C_IN_MCTS|C_IN_IOCTLW);
#else
        cy_writel(&ch_ctrl[channel].intr_enable,
                  C_IN_MDCD|C_IN_MCTS);
#endif
        retval = cyz_issue_cmd( &cy_card[card],
            channel, C_CM_IOCTL, 0L);   /* was C_CM_RESET */
        if (retval != 0){
            printk("cyc:startup(1) retval was %x\n", retval);
        }
 
        /* set timeout !!! */
        /* set RTS and DTR !!! */
        cy_writel(&ch_ctrl[channel].rs_control,
             cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR) ;
        retval = cyz_issue_cmd(&cy_card[info->card],
            channel, C_CM_IOCTLM, 0L);
        if (retval != 0){
            printk("cyc:startup(2) retval was %x\n", retval);
        }
#ifdef CY_DEBUG_DTR
            printk("cyc:startup raising Z DTR\n");
#endif
 
        /* enable send, recv, modem !!! */
 
        info->flags |= ASYNC_INITIALIZED;
        if (info->tty){
            clear_bit(TTY_IO_ERROR, &info->tty->flags);
        }
        info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
        memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
        info->idle_stats.in_use    =
        info->idle_stats.recv_idle =
        info->idle_stats.xmit_idle = jiffies;
    }
 
#ifdef CY_DEBUG_OPEN
        printk(" cyc startup done\n");
#endif
        return 0;
} /* startup */
 
 
static void
start_xmit( struct cyclades_port *info )
{
  unsigned long flags;
  unsigned char *base_addr;
  int card,chip,channel,index;
 
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
            cy_writeb((u_long)base_addr+(CyCAR<<index), channel);
            cy_writeb((u_long)base_addr+(CySRER<<index),
               cy_readb(base_addr+(CySRER<<index)) | CyTxMpty);
        restore_flags(flags);
    } else {
        /* Don't have to do anything at this time */
    }
} /* start_xmit */
 
 
/*
 * This routine shuts down a serial port; interrupts are disabled,
 * and DTR is dropped if the hangup on close termio flag is on.
 */
static void
shutdown(struct cyclades_port * info)
{
  unsigned long flags;
  unsigned char *base_addr;
  int card,chip,channel,index;
 
    if (!(info->flags & ASYNC_INITIALIZED)){
        return;
    }
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
#ifdef CY_DEBUG_OPEN
    printk("cyc shutdown Y card %d, chip %d, channel %d, base_addr %lx\n",
                card, chip, channel, (long)base_addr);
#endif
 
        save_flags(flags); cli();
 
            if (info->xmit_buf){
                unsigned char * temp;
                temp = info->xmit_buf;
                info->xmit_buf = 0;
                free_page((unsigned long) temp);
            }
            cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
            if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
                cy_writeb((u_long)base_addr+(CyMSVR1<<index), ~CyRTS);
                cy_writeb((u_long)base_addr+(CyMSVR2<<index), ~CyDTR);
#ifdef CY_DEBUG_DTR
                printk("cyc shutdown dropping DTR\n");
                printk("     status: 0x%x, 0x%x\n",
                    cy_readb(base_addr+(CyMSVR1<<index)),
                    cy_readb(base_addr+(CyMSVR2<<index)));
#endif
            }
            cyy_issue_cmd(base_addr,CyCHAN_CTL|CyDIS_RCVR,index);
             /* it may be appropriate to clear _XMIT at
               some later date (after testing)!!! */
 
            if (info->tty){
                set_bit(TTY_IO_ERROR, &info->tty->flags);
            }
            info->flags &= ~ASYNC_INITIALIZED;
        restore_flags(flags);
    } else {
      struct FIRM_ID *firm_id;
      struct ZFW_CTRL *zfw_ctrl;
      struct BOARD_CTRL *board_ctrl;
      struct CH_CTRL *ch_ctrl;
      int retval;
 
        base_addr = (unsigned char*) (cy_card[card].base_addr);
#ifdef CY_DEBUG_OPEN
    printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
                card, channel, (long)base_addr);
#endif
 
        firm_id = (struct FIRM_ID *) (base_addr + ID_ADDRESS);
        if (!ISZLOADED(cy_card[card])) {
            return;
        }
 
        zfw_ctrl =
            (struct ZFW_CTRL *)
                (cy_card[card].base_addr + cy_readl(&firm_id->zfwctrl_addr));
        board_ctrl = &(zfw_ctrl->board_ctrl);
        ch_ctrl = zfw_ctrl->ch_ctrl;
 
        save_flags(flags); cli();
 
            if (info->xmit_buf){
                unsigned char * temp;
                temp = info->xmit_buf;
                info->xmit_buf = 0;
                free_page((unsigned long) temp);
            }
 
            if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
                cy_writel((u_long)&ch_ctrl[channel].rs_control,
                   (uclong)(cy_readl(&ch_ctrl[channel].rs_control) &
                   ~(C_RS_RTS | C_RS_DTR)));
                retval = cyz_issue_cmd(&cy_card[info->card],
                        channel, C_CM_IOCTLM, 0L);
                if (retval != 0){
                    printk("cyc:shutdown retval (2) was %x\n", retval);
                }
#ifdef CY_DEBUG_DTR
                printk("cyc:shutdown dropping Z DTR\n");
#endif
            }
 
            if (info->tty){
                set_bit(TTY_IO_ERROR, &info->tty->flags);
            }
            info->flags &= ~ASYNC_INITIALIZED;
 
        restore_flags(flags);
    }
 
#ifdef CY_DEBUG_OPEN
    printk(" cyc shutdown done\n");
#endif
    return;
} /* shutdown */
 
 
/*
 * ------------------------------------------------------------
 * cy_open() and friends
 * ------------------------------------------------------------
 */
 
static int
block_til_ready(struct tty_struct *tty, struct file * filp,
                           struct cyclades_port *info)
{
  struct wait_queue wait = { current, NULL };
  struct cyclades_card *cinfo;
  unsigned long flags;
  int chip, channel,index;
  int retval;
  char *base_addr;
 
    /*
     * If the device is in the middle of being closed, then block
     * until it's done, and then try again.
     */
    if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
        if (info->flags & ASYNC_CLOSING) {
            interruptible_sleep_on(&info->close_wait);
        }
        if (info->flags & ASYNC_HUP_NOTIFY){
            return -EAGAIN;
        }else{
            return -ERESTARTSYS;
        }
    }
 
    /*
     * If this is a callout device, then just make sure the normal
     * device isn't being used.
     */
    if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
        if (info->flags & ASYNC_NORMAL_ACTIVE){
            return -EBUSY;
        }
        if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
            (info->flags & ASYNC_SESSION_LOCKOUT) &&
            (info->session != current->session)){
            return -EBUSY;
        }
        if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
            (info->flags & ASYNC_PGRP_LOCKOUT) &&
            (info->pgrp != current->pgrp)){
            return -EBUSY;
        }
        info->flags |= ASYNC_CALLOUT_ACTIVE;
        return 0;
    }
 
    /*
     * If non-blocking mode is set, then make the check up front
     * and then exit.
     */
    if ((filp->f_flags & O_NONBLOCK) ||
        (tty->flags & (1 << TTY_IO_ERROR))) {
        if (info->flags & ASYNC_CALLOUT_ACTIVE){
            return -EBUSY;
        }
        info->flags |= ASYNC_NORMAL_ACTIVE;
        return 0;
    }
 
    /*
     * Block waiting for the carrier detect and the line to become
     * free (i.e., not in use by the callout).  While we are in
     * this loop, info->count is dropped by one, so that
     * cy_close() knows when to free things.  We restore it upon
     * exit, either normal or abnormal.
     */
    retval = 0;
    add_wait_queue(&info->open_wait, &wait);
#ifdef CY_DEBUG_OPEN
    printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
           info->line, info->count);/**/
#endif
    save_flags(flags); cli();
    if (!tty_hung_up_p(filp))
        info->count--;
    restore_flags(flags);
#ifdef CY_DEBUG_COUNT
    printk("cyc block_til_ready: (%d): decrementing count to %d\n",
        current->pid, info->count);
#endif
    info->blocked_open++;
 
    cinfo = &cy_card[info->card];
    channel = info->line - cinfo->first_line;
    if (!IS_CYC_Z(*cinfo)) {
        chip = channel>>2;
        channel &= 0x03;
        index = cinfo->bus_index;
        base_addr = (char *)(cinfo->base_addr
                            + (cy_chip_offset[chip]<<index));
 
        while (1) {
            save_flags(flags); cli();
                if (!(info->flags & ASYNC_CALLOUT_ACTIVE)){
                    cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                    cy_writeb((u_long)base_addr+(CyMSVR1<<index), CyRTS);
                    cy_writeb((u_long)base_addr+(CyMSVR2<<index), CyDTR);
#ifdef CY_DEBUG_DTR
                    printk("cyc:block_til_ready raising DTR\n");
                    printk("     status: 0x%x, 0x%x\n",
                        cy_readb(base_addr+(CyMSVR1<<index)),
                        cy_readb(base_addr+(CyMSVR2<<index)));
#endif
                }
            restore_flags(flags);
            current->state = TASK_INTERRUPTIBLE;
            if (tty_hung_up_p(filp)
            || !(info->flags & ASYNC_INITIALIZED) ){
                if (info->flags & ASYNC_HUP_NOTIFY) {
                    retval = -EAGAIN;
                }else{
                    retval = -ERESTARTSYS;
                }
                break;
            }
            save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (!(info->flags & ASYNC_CALLOUT_ACTIVE)
                && !(info->flags & ASYNC_CLOSING)
                && (C_CLOCAL(tty)
                    || (cy_readb(base_addr+(CyMSVR1<<index)) & CyDCD))) {
                        restore_flags(flags);
                        break;
                }
            restore_flags(flags);
            if (current->signal & ~current->blocked) {
                retval = -ERESTARTSYS;
                break;
            }
#ifdef CY_DEBUG_OPEN
            printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
                   info->line, info->count);/**/
#endif
            schedule();
        }
    } else {
      struct FIRM_ID *firm_id;
      struct ZFW_CTRL *zfw_ctrl;
      struct BOARD_CTRL *board_ctrl;
      struct CH_CTRL *ch_ctrl;
      int retval;
 
        base_addr = (char *)(cinfo->base_addr);
        firm_id = (struct FIRM_ID *)
                        (base_addr + ID_ADDRESS);
        if (!ISZLOADED(*cinfo)){
            return -EINVAL;
        }
 
        zfw_ctrl =
            (struct ZFW_CTRL *)
                (base_addr + cy_readl(&firm_id->zfwctrl_addr));
        board_ctrl = &zfw_ctrl->board_ctrl;
        ch_ctrl = zfw_ctrl->ch_ctrl;
 
        while (1) {
            cy_writel(&ch_ctrl[channel].rs_control,
               cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR);
            retval = cyz_issue_cmd(&cy_card[info->card],
                    channel, C_CM_IOCTLM, 0L);
            if (retval != 0){
                printk("cyc:block_til_ready retval was %x\n", retval);
            }
#ifdef CY_DEBUG_DTR
                    printk("cyc:block_til_ready raising Z DTR\n");
#endif
 
            current->state = TASK_INTERRUPTIBLE;
            if (tty_hung_up_p(filp)
            || !(info->flags & ASYNC_INITIALIZED) ){
                if (info->flags & ASYNC_HUP_NOTIFY) {
                    retval = -EAGAIN;
                }else{
                    retval = -ERESTARTSYS;
                }
                break;
            }
            if (!(info->flags & ASYNC_CALLOUT_ACTIVE)
            && !(info->flags & ASYNC_CLOSING)
            && (C_CLOCAL(tty)
              || (cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) {
                break;
            }
            if (current->signal & ~current->blocked) {
                retval = -ERESTARTSYS;
                break;
            }
#ifdef CY_DEBUG_OPEN
            printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
                   info->line, info->count);/**/
#endif
            schedule();
        }
    }
    current->state = TASK_RUNNING;
    remove_wait_queue(&info->open_wait, &wait);
    if (!tty_hung_up_p(filp)){
        info->count++;
#ifdef CY_DEBUG_COUNT
        printk("cyc:block_til_ready (%d): incrementing count to %d\n",
            current->pid, info->count);
#endif
    }
    info->blocked_open--;
#ifdef CY_DEBUG_OPEN
    printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
           info->line, info->count);/**/
#endif
    if (retval)
        return retval;
    info->flags |= ASYNC_NORMAL_ACTIVE;
    return 0;
} /* block_til_ready */
 
/*
 * This routine is called whenever a serial port is opened.  It
 * performs the serial-specific initialization for the tty structure.
 */
int
cy_open(struct tty_struct *tty, struct file * filp)
{
  struct cyclades_port  *info;
  int retval, line;
  unsigned long page;
 
    MOD_INC_USE_COUNT;
    line = MINOR(tty->device) - tty->driver.minor_start;
    if ((line < 0) || (NR_PORTS <= line)){
        MOD_DEC_USE_COUNT;
        return -ENODEV;
    }
    info = &cy_port[line];
    if (info->line < 0){
        MOD_DEC_USE_COUNT;
        return -ENODEV;
    }
 
    /* If the card's firmware hasn't been loaded,
       treat it as absent from the system.  This
       will make the user pay attention.
    */
    if (IS_CYC_Z(cy_card[info->card])) {
        if (!ISZLOADED(cy_card[info->card])) {
            if (((ZE_V1 ==cy_readl(&((struct RUNTIME_9060 *)
                ((cy_card[info->card]).ctl_addr))->mail_box_0)) &&
                Z_FPGA_CHECK(cy_card[info->card])) &&
                (ZFIRM_HLT==cy_readl(&((struct FIRM_ID *)
                ((cy_card[info->card]).base_addr+ID_ADDRESS))->signature)))
            {
                printk ("Cyclades-Z Error: you need an external power supply for this number of ports.\n\rFirmware halted.\r\n");
            } else {
                printk("Cyclades-Z firmware not yet loaded\n");
            }
            return -ENODEV;
        }
    }
#ifdef CY_DEBUG_OTHER
    printk("cyc:cy_open ttyC%d\n", info->line); /* */
#endif
    tty->driver_data = info;
    info->tty = tty;
    if (serial_paranoia_check(info, tty->device, "cy_open")){
        return -ENODEV;
    }
#ifdef CY_DEBUG_OPEN
    printk("cyc:cy_open ttyC%d, count = %d\n",
        info->line, info->count);/**/
#endif
    info->count++;
#ifdef CY_DEBUG_COUNT
    printk("cyc:cy_open (%d): incrementing count to %d\n",
        current->pid, info->count);
#endif
 
    if (!tmp_buf) {
        page = get_free_page(GFP_KERNEL);
        if (!page)
            return -ENOMEM;
        if (tmp_buf)
            free_page(page);
        else
            tmp_buf = (unsigned char *) page;
    }
 
    if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
        if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
            *tty->termios = info->normal_termios;
        else
            *tty->termios = info->callout_termios;
    }
    /*
     * Start up serial port
     */
    retval = startup(info);
    if (retval){
        return retval;
    }
 
    retval = block_til_ready(tty, filp, info);
    if (retval) {
#ifdef CY_DEBUG_OPEN
        printk("cyc:cy_open returning after block_til_ready with %d\n",
               retval);
#endif
        return retval;
    }
 
    info->session = current->session;
    info->pgrp = current->pgrp;
 
#ifdef CY_DEBUG_OPEN
    printk(" cyc:cy_open done\n");/**/
#endif
 
    return 0;
} /* cy_open */
 
/*
 * cy_wait_until_sent() --- wait until the transmitter is empty
 */
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
{
  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
  unsigned char *base_addr;
  int card,chip,channel,index;
  unsigned long orig_jiffies, char_time;
 
    if (serial_paranoia_check(info, tty->device, "cy_wait_until_sent"))
        return;
 
    if (info->xmit_fifo_size == 0)
        return; /* Just in case.... */
 
    orig_jiffies = jiffies;
    /*
     * Set the check interval to be 1/5 of the estimated time to
     * send a single character, and make it at least 1.  The check
     * interval should also be less than the timeout.
     *
     * Note: we have to use pretty tight timings here to satisfy
     * the NIST-PCTS.
     */
    char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
    char_time = char_time / 5;
    if (char_time == 0)
        char_time = 1;
    if (timeout < 0)
        timeout = 0;
    if (timeout)
        char_time = MIN(char_time, timeout);
    /*
     * If the transmitter hasn't cleared in twice the approximate
     * amount of time to send the entire FIFO, it probably won't
     * ever clear.  This assumes the UART isn't doing flow
     * control, which is currently the case.  Hence, if it ever
     * takes longer than info->timeout, this is probably due to a
     * UART bug of some kind.  So, we clamp the timeout parameter at
     * 2*info->timeout.
     */
    if (!timeout || timeout > 2*info->timeout)
        timeout = 2*info->timeout;
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
    printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
    printk("jiff=%lu...", jiffies);
#endif
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char *)
                (cy_card[card].base_addr + (cy_chip_offset[chip]<<index));
        while (cy_readb(base_addr+(CySRER<<index)) & CyTxMpty) {
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
            printk("Not clean (jiff=%lu)...", jiffies);
#endif
            current->state = TASK_INTERRUPTIBLE;
            current->counter = 0;       /* make us low-priority */
            current->timeout = jiffies + char_time;
            schedule();
            if (current->signal & ~current->blocked)
                break;
            if (timeout && ((orig_jiffies + timeout) < jiffies))
                break;
        }
        current->state = TASK_RUNNING;
    } else {
        // Nothing to do!
    }
    /* Run one more char cycle */
    current->state = TASK_INTERRUPTIBLE;
    current->counter = 0;       /* make us low-priority */
    current->timeout = jiffies + (char_time * 5);
    schedule();
    current->state = TASK_RUNNING;
#ifdef CY_DEBUG_WAIT_UNTIL_SENT
    printk("Clean (jiff=%lu)...done\n", jiffies);
#endif
}
 
/*
 * This routine is called when a particular tty device is closed.
 */
static void
cy_close(struct tty_struct * tty, struct file * filp)
{
  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
  unsigned long flags;
 
#ifdef CY_DEBUG_OTHER
    printk("cyc:cy_close ttyC%d\n", info->line);
#endif
 
    if (!info || serial_paranoia_check(info, tty->device, "cy_close")){
        return;
    }
#ifdef CY_DEBUG_OPEN
    printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
#endif
 
    save_flags(flags); cli();
 
    /* If the TTY is being hung up, nothing to do */
    if (tty_hung_up_p(filp)) {
        MOD_DEC_USE_COUNT;
        restore_flags(flags);
        return;
    }
 
    if ((tty->count == 1) && (info->count != 1)) {
        /*
         * Uh, oh.  tty->count is 1, which means that the tty
         * structure will be freed.  Info->count should always
         * be one in these conditions.  If it's greater than
         * one, we've got real problems, since it means the
         * serial port won't be shutdown.
         */
        printk("cyc:cy_close: bad serial port count; tty->count is 1, "
           "info->count is %d\n", info->count);
        info->count = 1;
    }
#ifdef CY_DEBUG_COUNT
    printk("cyc:cy_close at (%d): decrementing count to %d\n",
        current->pid, info->count - 1);
#endif
    if (--info->count < 0) {
#ifdef CY_DEBUG_COUNT
    printk("cyc:cyc_close setting count to 0\n");
#endif
        info->count = 0;
    }
    if (info->count) {
        MOD_DEC_USE_COUNT;
        restore_flags(flags);
        return;
    }
    info->flags |= ASYNC_CLOSING;
    /*
     * Save the termios structure, since this port may have
     * separate termios for callout and dialin.
     */
    if (info->flags & ASYNC_NORMAL_ACTIVE)
        info->normal_termios = *tty->termios;
    if (info->flags & ASYNC_CALLOUT_ACTIVE)
        info->callout_termios = *tty->termios;
 
    /*
    * Now we wait for the transmit buffer to clear; and we notify
    * the line discipline to only process XON/XOFF characters.
    */
    tty->closing = 1;
    if (info->closing_wait != CY_CLOSING_WAIT_NONE)
        tty_wait_until_sent(tty, info->closing_wait);
 
    if (!IS_CYC_Z(cy_card[info->card])) {
        int channel = info->line - cy_card[info->card].first_line;
        int index = cy_card[info->card].bus_index;
        unsigned char *base_addr = (unsigned char *)
                        (cy_card[info->card].base_addr +
                         (cy_chip_offset[channel>>2] <<index));
        /* Stop accepting input */
        channel &= 0x03;
        cy_writeb((ulong)base_addr+(CyCAR<<index), (u_char)channel);
        cy_writeb((u_long)base_addr+(CySRER<<index),
                        cy_readb(base_addr+(CySRER<<index)) & ~CyRxData);
        if (info->flags & ASYNC_INITIALIZED) {
            /* Waiting for on-board buffers to be empty before closing
               the port */
            cy_wait_until_sent(tty, info->timeout);
        }
    } else {
#ifdef Z_WAKE
        /* Waiting for on-board buffers to be empty before closing the port */
        unsigned char *base_addr = (unsigned char *)
                                        cy_card[info->card].base_addr;
        struct FIRM_ID *firm_id = (struct FIRM_ID *) (base_addr + ID_ADDRESS);
        struct ZFW_CTRL *zfw_ctrl =
            (struct ZFW_CTRL *) (base_addr + cy_readl(&firm_id->zfwctrl_addr));
        struct CH_CTRL *ch_ctrl = zfw_ctrl->ch_ctrl;
        int channel = info->line - cy_card[info->card].first_line;
        int retval;
 
        if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
            retval = cyz_issue_cmd(&cy_card[info->card], channel,
                                   C_CM_IOCTLW, 0L);
            if (retval != 0){
                printk("cyc:shutdown retval (1) was %x\n", retval);
            }
            interruptible_sleep_on(&info->shutdown_wait);
        }
#endif
    }
 
    shutdown(info);
    if (tty->driver.flush_buffer)
        tty->driver.flush_buffer(tty);
    if (tty->ldisc.flush_buffer)
        tty->ldisc.flush_buffer(tty);
    tty->closing = 0;
    info->event = 0;
    info->tty = 0;
    if (info->blocked_open) {
        if (info->close_delay) {
            current->state = TASK_INTERRUPTIBLE;
            current->timeout = jiffies + info->close_delay;
            schedule();
        }
        wake_up_interruptible(&info->open_wait);
    }
    info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
                     ASYNC_CLOSING);
    wake_up_interruptible(&info->close_wait);
 
#ifdef CY_DEBUG_OTHER
    printk(" cyc:cy_close done\n");
#endif
 
    MOD_DEC_USE_COUNT;
    restore_flags(flags);
} /* cy_close */
 
 
/* This routine gets called when tty_write has put something into
 * the write_queue.  The characters may come from user space or
 * kernel space.
 *
 * This routine will return the number of characters actually
 * accepted for writing.
 *
 * If the port is not already transmitting stuff, start it off by
 * enabling interrupts.  The interrupt service routine will then
 * ensure that the characters are sent.
 * If the port is already active, there is no need to kick it.
 *
 */
static int
cy_write(struct tty_struct * tty, int from_user,
           const unsigned char *buf, int count)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  unsigned long flags;
  int c, total = 0;
 
#ifdef CY_DEBUG_IO
    printk("cyc:cy_write ttyC%d\n", info->line); /* */
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_write")){
        return 0;
    }
 
    if (!tty || !info->xmit_buf || !tmp_buf){
        return 0;
    }
 
    if (from_user)
        down(&tmp_buf_sem);
    save_flags(flags);
    while (1) {
        cli();
        c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
                           SERIAL_XMIT_SIZE - info->xmit_head));
        if (c <= 0)
            break;
 
        if (from_user) {
            copy_from_user(tmp_buf, buf, c);
            c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
                       SERIAL_XMIT_SIZE - info->xmit_head));
            memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
        } else
            memcpy(info->xmit_buf + info->xmit_head, buf, c);
        info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
        info->xmit_cnt += c;
        restore_flags(flags);
        buf += c;
        count -= c;
        total += c;
#if 0
        SP("CW");
        CP16(c);
        SP(" ");
#endif
    }
 
    info->idle_stats.xmit_bytes += total;
    info->idle_stats.xmit_idle   = jiffies;
 
    if (from_user)
        up(&tmp_buf_sem);
    if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
        start_xmit(info);
    }
    restore_flags(flags);
    return total;
} /* cy_write */
 
 
/*
 * This routine is called by the kernel to write a single
 * character to the tty device.  If the kernel uses this routine,
 * it must call the flush_chars() routine (if defined) when it is
 * done stuffing characters into the driver.  If there is no room
 * in the queue, the character is ignored.
 */
static void
cy_put_char(struct tty_struct *tty, unsigned char ch)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  unsigned long flags;
 
#ifdef CY_DEBUG_IO
    printk("cyc:cy_put_char ttyC%d\n", info->line);
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_put_char"))
        return;
 
    if (!tty || !info->xmit_buf)
        return;
 
    save_flags(flags); cli();
        if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
            restore_flags(flags);
            return;
        }
 
        info->xmit_buf[info->xmit_head++] = ch;
        info->xmit_head &= SERIAL_XMIT_SIZE - 1;
        info->xmit_cnt++;
        info->idle_stats.xmit_bytes++;
        info->idle_stats.xmit_idle = jiffies;
    restore_flags(flags);
#if 0
        SP("+");
#endif
} /* cy_put_char */
 
 
/*
 * This routine is called by the kernel after it has written a
 * series of characters to the tty device using put_char().
 */
static void
cy_flush_chars(struct tty_struct *tty)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  unsigned long flags;
  unsigned char *base_addr;
  int card,chip,channel,index;
 
#ifdef CY_DEBUG_IO
    printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_flush_chars"))
        return;
 
    if (info->xmit_cnt <= 0 || tty->stopped
    || tty->hw_stopped || !info->xmit_buf)
        return;
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
            cy_writeb((u_long)base_addr+(CyCAR<<index), channel);
            cy_writeb((u_long)base_addr+(CySRER<<index),
               cy_readb(base_addr+(CySRER<<index)) | CyTxMpty);
        restore_flags(flags);
    } else {
        /* Since polling is already in place,
            nothing further need be done.  */
    }
} /* cy_flush_chars */
 
 
/*
 * This routine returns the numbers of characters the tty driver
 * will accept for queuing to be written.  This number is subject
 * to change as output buffers get emptied, or if the output flow
 * control is activated.
 */
static int
cy_write_room(struct tty_struct *tty)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  int   ret;
 
#ifdef CY_DEBUG_IO
    printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_write_room"))
        return 0;
    ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
    if (ret < 0)
        ret = 0;
    return ret;
} /* cy_write_room */
 
 
static int
cy_chars_in_buffer(struct tty_struct *tty)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  int card, channel;
 
    if (serial_paranoia_check(info, tty->device, "cy_chars_in_buffer"))
        return 0;
 
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
 
    if (!IS_CYC_Z(cy_card[card])) {
#ifdef CY_DEBUG_IO
        printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
                info->line, info->xmit_cnt); /* */
#endif
        return info->xmit_cnt;
    } else {
        static volatile struct FIRM_ID *firm_id;
        static volatile struct ZFW_CTRL *zfw_ctrl;
        static volatile struct CH_CTRL *ch_ctrl;
        static volatile struct BUF_CTRL *buf_ctrl;
        int char_count;
        volatile uclong tx_put, tx_get, tx_bufsize;
 
        firm_id = (struct FIRM_ID *)(cy_card[card].base_addr + ID_ADDRESS);
        zfw_ctrl = (struct ZFW_CTRL *) (cy_card[card].base_addr +
                                cy_readl(&firm_id->zfwctrl_addr));
        ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
        buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
 
        tx_get = cy_readl(&buf_ctrl->tx_get);
        tx_put = cy_readl(&buf_ctrl->tx_put);
        tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
        if (tx_put >= tx_get)
            char_count = tx_put - tx_get;
        else
            char_count = tx_put - tx_get + tx_bufsize;
#ifdef CY_DEBUG_IO
        printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
                info->line, info->xmit_cnt + char_count); /* */
#endif
        return (info->xmit_cnt + char_count);
    }
} /* cy_chars_in_buffer */
 
 
/*
 * ------------------------------------------------------------
 * cy_ioctl() and friends
 * ------------------------------------------------------------
 */
 
 
/*
 * This routine finds or computes the various line characteristics.
 * It used to be called config_setup
 */
static void
set_line_char(struct cyclades_port * info)
{
  unsigned long flags;
  unsigned char *base_addr;
  int card,chip,channel,index;
  unsigned cflag, iflag;
  unsigned short chip_number;
  int   i;
 
 
    if (!info->tty || !info->tty->termios){
        return;
    }
    if (info->line == -1){
        return;
    }
    cflag = info->tty->termios->c_cflag;
    iflag = info->tty->termios->c_iflag;
 
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
    chip_number = channel / 4;
 
    if (!IS_CYC_Z(cy_card[card])) {
 
        index = cy_card[card].bus_index;
 
        /* baud rate */
        i = cflag & CBAUD;
 
        if (i & CBAUDEX) {
            if (i == B57600)
                i = 16;
#ifdef B76800
            else if(i == B76800)
                i = 17;
#endif
            else if(i == B115200)
                i = 18;
            else if(i == B230400 && (info->chip_rev >= CD1400_REV_J)) {
                /* It is a CD1400 rev. J or later */
                i = 20;
            }
            else
                info->tty->termios->c_cflag &= ~CBAUDEX;
        }
 
        if (i == 15) {
            if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
                i += 1;
            if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
                i += 3;
            if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST){
                switch(info->baud) {
                    case 57600:
                        i += 1; break;
#ifdef B76800
                    case 76800:
                        i += 2; break;
#endif
                    case 115200:
                        i += 3; break;
                    case 230400:
                        i += 5; break;
                    default:
                        break;
                }
            }
        }
        if(info->chip_rev >= CD1400_REV_J) {
            /* It is a CD1400 rev. J or later */
            info->tbpr = baud_bpr_60[i]; /* Tx BPR */
            info->tco = baud_co_60[i]; /* Tx CO */
            info->rbpr = baud_bpr_60[i]; /* Rx BPR */
            info->rco = baud_co_60[i]; /* Rx CO */
        } else {
            info->tbpr = baud_bpr_25[i]; /* Tx BPR */
            info->tco = baud_co_25[i]; /* Tx CO */
            info->rbpr = baud_bpr_25[i]; /* Rx BPR */
            info->rco = baud_co_25[i]; /* Rx CO */
        }
        if (baud_table[i] == 134) {
            info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
            /* get it right for 134.5 baud */
        } else if (baud_table[i]) {
            info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
            /* this needs to be propagated into the card info */
        } else {
            info->timeout = 0;
        }
        /* By tradition (is it a standard?) a baud rate of zero
           implies the line should be/has been closed.  A bit
           later in this routine such a test is performed. */
 
        /* byte size and parity */
        info->cor5 = 0;
        info->cor4 = 0;
        info->cor3 = (info->default_threshold
                      ? info->default_threshold
                      : baud_cor3[i]); /* receive threshold */
        info->cor2 = CyETC;
        switch(cflag & CSIZE){
        case CS5:
            info->cor1 = Cy_5_BITS;
            break;
        case CS6:
            info->cor1 = Cy_6_BITS;
            break;
        case CS7:
            info->cor1 = Cy_7_BITS;
            break;
        case CS8:
            info->cor1 = Cy_8_BITS;
            break;
        }
        if(cflag & CSTOPB){
            info->cor1 |= Cy_2_STOP;
        }
        if (cflag & PARENB){
            if (cflag & PARODD){
                info->cor1 |= CyPARITY_O;
            }else{
                info->cor1 |= CyPARITY_E;
            }
        }else{
            info->cor1 |= CyPARITY_NONE;
        }
 
        /* CTS flow control flag */
        if (cflag & CRTSCTS){
            info->flags |= ASYNC_CTS_FLOW;
            info->cor2 |= CyCtsAE;
        }else{
            info->flags &= ~ASYNC_CTS_FLOW;
            info->cor2 &= ~CyCtsAE;
        }
        if (cflag & CLOCAL)
            info->flags &= ~ASYNC_CHECK_CD;
        else
            info->flags |= ASYNC_CHECK_CD;
 
         /***********************************************
            The hardware option, CyRtsAO, presents RTS when
            the chip has characters to send.  Since most modems
            use RTS as reverse (inbound) flow control, this
            option is not used.  If inbound flow control is
            necessary, DTR can be programmed to provide the
            appropriate signals for use with a non-standard
            cable.  Contact Marcio Saito for details.
         ***********************************************/
 
        chip = channel>>2;
        channel &= 0x03;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
            cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
 
           /* tx and rx baud rate */
 
            cy_writeb((u_long)base_addr+(CyTCOR<<index), info->tco);
            cy_writeb((u_long)base_addr+(CyTBPR<<index), info->tbpr);
            cy_writeb((u_long)base_addr+(CyRCOR<<index), info->rco);
            cy_writeb((u_long)base_addr+(CyRBPR<<index), info->rbpr);
 
            /* set line characteristics  according configuration */
 
            cy_writeb((u_long)base_addr+(CySCHR1<<index),
                      START_CHAR(info->tty));
            cy_writeb((u_long)base_addr+(CySCHR2<<index),
                      STOP_CHAR(info->tty));
            cy_writeb((u_long)base_addr+(CyCOR1<<index), info->cor1);
            cy_writeb((u_long)base_addr+(CyCOR2<<index), info->cor2);
            cy_writeb((u_long)base_addr+(CyCOR3<<index), info->cor3);
            cy_writeb((u_long)base_addr+(CyCOR4<<index), info->cor4);
            cy_writeb((u_long)base_addr+(CyCOR5<<index), info->cor5);
 
            cyy_issue_cmd(base_addr,
                     CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch,index);
 
            cy_writeb((u_long)base_addr+(CyCAR<<index),
                      (u_char)channel); /* !!! Is this needed? */
            cy_writeb((u_long)base_addr+(CyRTPR<<index), (info->default_timeout
                                                 ? info->default_timeout
                                                 : 0x02)); /* 10ms rx timeout */
 
            if (C_CLOCAL(info->tty)) {
                /* without modem intr */
                cy_writeb((u_long)base_addr+(CySRER<<index),
                   cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
                                        /* act on 1->0 modem transitions */
                if ((cflag & CRTSCTS) && info->rflow) {
                        cy_writeb((u_long)base_addr+(CyMCOR1<<index),
                                  (CyCTS|rflow_thr[i]));
                } else {
                        cy_writeb((u_long)base_addr+(CyMCOR1<<index), CyCTS);
                }
                                        /* act on 0->1 modem transitions */
                cy_writeb((u_long)base_addr+(CyMCOR2<<index), CyCTS);
            } else {
                /* without modem intr */
                cy_writeb((u_long)base_addr+(CySRER<<index),
                   cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
                                        /* act on 1->0 modem transitions */
                if ((cflag & CRTSCTS) && info->rflow) {
                        cy_writeb((u_long)base_addr+(CyMCOR1<<index),
                                  (CyDSR|CyCTS|CyRI|CyDCD|rflow_thr[i]));
                } else {
                        cy_writeb((u_long)base_addr+(CyMCOR1<<index),
                                  CyDSR|CyCTS|CyRI|CyDCD);
                }
                                        /* act on 0->1 modem transitions */
                cy_writeb((u_long)base_addr+(CyMCOR2<<index),
                          CyDSR|CyCTS|CyRI|CyDCD);
            }
 
            if(i == 0){ /* baud rate is zero, turn off line */
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), ~CyRTS);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), ~CyDTR);
                }
#ifdef CY_DEBUG_DTR
                printk("cyc:set_line_char dropping DTR\n");
                printk("     status: 0x%x,
                    0x%x\n", cy_readb(base_addr+(CyMSVR1<<index)),
                    cy_readb(base_addr+(CyMSVR2<<index)));
#endif
            }else{
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), CyRTS);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), CyDTR);
                }
#ifdef CY_DEBUG_DTR
                printk("cyc:set_line_char raising DTR\n");
                printk("     status: 0x%x, 0x%x\n",
                    cy_readb(base_addr+(CyMSVR1<<index)),
                    cy_readb(base_addr+(CyMSVR2<<index)));
#endif
            }
 
            if (info->tty){
                clear_bit(TTY_IO_ERROR, &info->tty->flags);
            }
 
        restore_flags(flags);
    } else {
      struct FIRM_ID *firm_id;
      struct ZFW_CTRL *zfw_ctrl;
      struct BOARD_CTRL *board_ctrl;
      struct CH_CTRL *ch_ctrl;
      struct BUF_CTRL *buf_ctrl;
      int retval;
 
        firm_id = (struct FIRM_ID *)
                        (cy_card[card].base_addr + ID_ADDRESS);
        if (!ISZLOADED(cy_card[card])) {
            return;
        }
 
        zfw_ctrl = (struct ZFW_CTRL *)
                (cy_card[card].base_addr + cy_readl(&firm_id->zfwctrl_addr));
        board_ctrl = &zfw_ctrl->board_ctrl;
        ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
        buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
 
        /* baud rate */
        switch(i = cflag & CBAUD){
        /*
        case B0: cy_writel(&ch_ctrl->comm_baud , 0); break;
        */
        case B50: cy_writel(&ch_ctrl->comm_baud , 50); break;
        case B75: cy_writel(&ch_ctrl->comm_baud , 75); break;
        case B110: cy_writel(&ch_ctrl->comm_baud , 110); break;
        case B134: cy_writel(&ch_ctrl->comm_baud , 134); break;
        case B150: cy_writel(&ch_ctrl->comm_baud , 150); break;
        case B200: cy_writel(&ch_ctrl->comm_baud , 200); break;
        case B300: cy_writel(&ch_ctrl->comm_baud , 300); break;
        case B600: cy_writel(&ch_ctrl->comm_baud , 600); break;
        case B1200: cy_writel(&ch_ctrl->comm_baud , 1200); break;
        case B1800: cy_writel(&ch_ctrl->comm_baud , 1800); break;
        case B2400: cy_writel(&ch_ctrl->comm_baud , 2400); break;
        case B4800: cy_writel(&ch_ctrl->comm_baud , 4800); break;
        case B9600: cy_writel(&ch_ctrl->comm_baud , 9600); break;
        case B19200: cy_writel(&ch_ctrl->comm_baud , 19200); break;
        case B38400:
            if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI){
                cy_writel(&ch_ctrl->comm_baud , 57600);
            }else if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI){
                cy_writel(&ch_ctrl->comm_baud , 115200);
            }else if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST){
                cy_writel(&ch_ctrl->comm_baud , info->baud);
            }else{
                cy_writel(&ch_ctrl->comm_baud , 38400);
            }
            break;
        case B57600: cy_writel(&ch_ctrl->comm_baud , 57600); break;
#ifdef B76800
        case B76800: cy_writel(&ch_ctrl->comm_baud , 76800); break;
#endif
        case B115200: cy_writel(&ch_ctrl->comm_baud , 115200); break;
        case B230400: cy_writel(&ch_ctrl->comm_baud , 230400); break;
        case B460800: cy_writel(&ch_ctrl->comm_baud , 460800); break;
        }
 
        if ((i = cy_readl(&ch_ctrl->comm_baud)) == 134) {
            info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
            /* get it right for 134.5 baud */
        } else if (i) {
            info->timeout = (info->xmit_fifo_size*HZ*15/i) + 2;
            /* this needs to be propagated into the card info */
        } else {
            info->timeout = 0;
        }
 
        /* byte size and parity */
        switch(cflag & CSIZE){
        case CS5: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS5); break;
        case CS6: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS6); break;
        case CS7: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS7); break;
        case CS8: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS8); break;
        }
        if(cflag & CSTOPB){
            cy_writel(&ch_ctrl->comm_data_l,
               cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
        }else{
            cy_writel(&ch_ctrl->comm_data_l,
               cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
        }
        if (cflag & PARENB){
            if (cflag & PARODD){
                cy_writel(&ch_ctrl->comm_parity , C_PR_ODD);
            }else{
                cy_writel(&ch_ctrl->comm_parity , C_PR_EVEN);
            }
        }else{
            cy_writel(&ch_ctrl->comm_parity , C_PR_NONE);
        }
 
        /* CTS flow control flag */
        if (cflag & CRTSCTS){
            info->flags |= ASYNC_CTS_FLOW;
            cy_writel(&ch_ctrl->hw_flow,
               cy_readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
        }else{
            info->flags &= ~ASYNC_CTS_FLOW;
            cy_writel(&ch_ctrl->hw_flow,
               cy_readl(&ch_ctrl->hw_flow) & ~(C_RS_CTS | C_RS_RTS));
        }
 
        retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
        if (retval != 0){
            printk("cyc:set_line_char retval at %d was %x\n",
                __LINE__, retval);
        }
 
        /* CD sensitivity */
        if (cflag & CLOCAL){
            info->flags &= ~ASYNC_CHECK_CD;
        }else{
            info->flags |= ASYNC_CHECK_CD;
        }
 
        if (iflag & IXON){
            cy_writel(&ch_ctrl->sw_flow,
                cy_readl(&ch_ctrl->sw_flow) | C_FL_OXX);
        } else {
            cy_writel(&ch_ctrl->sw_flow,
                cy_readl(&ch_ctrl->sw_flow) & ~C_FL_OXX);
        }
 
        if(i == 0){ /* baud rate is zero, turn off line */
            cy_writel(&ch_ctrl->rs_control,
               cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
#ifdef CY_DEBUG_DTR
            printk("cyc:set_line_char dropping Z DTR\n");
#endif
        }else{
            cy_writel(&ch_ctrl->rs_control,
               cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
#ifdef CY_DEBUG_DTR
            printk("cyc:set_line_char raising Z DTR\n");
#endif
        }
 
        retval = cyz_issue_cmd( &cy_card[card], channel, C_CM_IOCTLM, 0L);
        if (retval != 0){
            printk("cyc:set_line_char retval at %d was %x\n",
                __LINE__, retval);
        }
 
        if (info->tty){
            clear_bit(TTY_IO_ERROR, &info->tty->flags);
        }
    }
 
} /* set_line_char */
 
 
static int
get_serial_info(struct cyclades_port * info,
                           struct serial_struct * retinfo)
{
  struct serial_struct tmp;
  struct cyclades_card *cinfo = &cy_card[info->card];
 
    if (!retinfo)
            return -EFAULT;
    memset(&tmp, 0, sizeof(tmp));
    tmp.type = info->type;
    tmp.line = info->line;
    tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
    tmp.irq = cinfo->irq;
    tmp.flags = info->flags;
    tmp.close_delay = info->close_delay;
    tmp.baud_base = info->baud;
    tmp.custom_divisor = 0;     /*!!!*/
    tmp.hub6 = 0;               /*!!!*/
    copy_to_user(retinfo,&tmp,sizeof(*retinfo));
    return 0;
} /* get_serial_info */
 
 
static int
set_serial_info(struct cyclades_port * info,
                           struct serial_struct * new_info)
{
  struct serial_struct new_serial;
  struct cyclades_port old_info;
 
    if (!new_info)
            return -EFAULT;
    copy_from_user(&new_serial,new_info,sizeof(new_serial));
    old_info = *info;
 
    if (!suser()) {
            if ((new_serial.close_delay != info->close_delay) ||
                (new_serial.baud_base != info->baud) ||
                ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
                    return -EPERM;
            info->flags = ((info->flags & ~ASYNC_USR_MASK) |
                           (new_serial.flags & ASYNC_USR_MASK));
            info->baud = new_serial.baud_base;
            goto check_and_exit;
    }
 
 
    /*
     * OK, past this point, all the error checking has been done.
     * At this point, we start making changes.....
     */
 
    info->baud = new_serial.baud_base;
    info->flags = ((info->flags & ~ASYNC_FLAGS) |
                    (new_serial.flags & ASYNC_FLAGS));
    info->close_delay = new_serial.close_delay * HZ/100;
    info->closing_wait = new_serial.closing_wait * HZ/100;
 
 
check_and_exit:
    if (info->flags & ASYNC_INITIALIZED){
        set_line_char(info);
        return 0;
    }else{
        return startup(info);
    }
} /* set_serial_info */
 
 
static int
get_modem_info(struct cyclades_port * info, unsigned int *value)
{
  int card,chip,channel,index;
  unsigned char *base_addr;
  unsigned long flags;
  unsigned char status;
  unsigned long lstatus;
  unsigned int result;
  struct FIRM_ID *firm_id;
  struct ZFW_CTRL *zfw_ctrl;
  struct BOARD_CTRL *board_ctrl;
  struct CH_CTRL *ch_ctrl;
 
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
            cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
            status = cy_readb(base_addr+(CyMSVR1<<index));
            status |= cy_readb(base_addr+(CyMSVR2<<index));
        restore_flags(flags);
 
 
        if (info->rtsdtr_inv) {
            result =  ((status  & CyRTS) ? TIOCM_DTR : 0)
                    | ((status  & CyDTR) ? TIOCM_RTS : 0);
        } else {
            result =  ((status  & CyRTS) ? TIOCM_RTS : 0)
                    | ((status  & CyDTR) ? TIOCM_DTR : 0);
        }
        result |=  ((status  & CyDCD) ? TIOCM_CAR : 0)
                 | ((status  & CyRI) ? TIOCM_RNG : 0)
                 | ((status  & CyDSR) ? TIOCM_DSR : 0)
                 | ((status  & CyCTS) ? TIOCM_CTS : 0);
    } else {
        base_addr = (unsigned char*) (cy_card[card].base_addr);
 
        if (cy_card[card].num_chips != -1){
            return -EINVAL;
        }
 
        firm_id = (struct FIRM_ID *)
                    (cy_card[card].base_addr + ID_ADDRESS);
        if (ISZLOADED(cy_card[card])) {
            zfw_ctrl = (struct ZFW_CTRL *)
                (cy_card[card].base_addr + cy_readl(&firm_id->zfwctrl_addr));
            board_ctrl = &zfw_ctrl->board_ctrl;
            ch_ctrl = zfw_ctrl->ch_ctrl;
            lstatus = cy_readl(&ch_ctrl[channel].rs_status);
            result =  ((lstatus  & C_RS_RTS) ? TIOCM_RTS : 0)
                    | ((lstatus  & C_RS_DTR) ? TIOCM_DTR : 0)
                    | ((lstatus  & C_RS_DCD) ? TIOCM_CAR : 0)
                    | ((lstatus  & C_RS_RI) ? TIOCM_RNG : 0)
                    | ((lstatus  & C_RS_DSR) ? TIOCM_DSR : 0)
                    | ((lstatus  & C_RS_CTS) ? TIOCM_CTS : 0);
        }else{
            result = 0;
            return -ENODEV;
        }
 
    }
    cy_put_user(result,(unsigned long *) value);
    return 0;
} /* get_modem_info */
 
 
static int
set_modem_info(struct cyclades_port * info, unsigned int cmd,
                          unsigned int *value)
{
  int card,chip,channel,index;
  unsigned char *base_addr;
  unsigned long flags;
  unsigned int arg = cy_get_user((unsigned long *) value);
  struct FIRM_ID *firm_id;
  struct ZFW_CTRL *zfw_ctrl;
  struct BOARD_CTRL *board_ctrl;
  struct CH_CTRL *ch_ctrl;
  int retval;
 
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        switch (cmd) {
        case TIOCMBIS:
            if (arg & TIOCM_RTS){
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (info->rtsdtr_inv) {
                    cy_writeb((u_long)base_addr+(CyMSVR2<<index), CyDTR);
                } else {
                    cy_writeb((u_long)base_addr+(CyMSVR1<<index), CyRTS);
                }
                restore_flags(flags);
            }
            if (arg & TIOCM_DTR){
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (info->rtsdtr_inv) {
                    cy_writeb((u_long)base_addr+(CyMSVR1<<index), CyRTS);
                } else {
                    cy_writeb((u_long)base_addr+(CyMSVR2<<index), CyDTR);
                }
#ifdef CY_DEBUG_DTR
                printk("cyc:set_modem_info raising DTR\n");
                printk("     status: 0x%x, 0x%x\n",
                    cy_readb(base_addr+(CyMSVR1<<index)),
                    cy_readb(base_addr+(CyMSVR2<<index)));
#endif
                restore_flags(flags);
            }
            break;
        case TIOCMBIC:
            if (arg & TIOCM_RTS){
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index),
                          (u_char)channel);
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), ~CyDTR);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), ~CyRTS);
                }
                restore_flags(flags);
            }
            if (arg & TIOCM_DTR){
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), ~CyRTS);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), ~CyDTR);
                }
#ifdef CY_DEBUG_DTR
                printk("cyc:set_modem_info dropping DTR\n");
                printk("     status: 0x%x, 0x%x\n",
                    cy_readb(base_addr+(CyMSVR1<<index)),
                    cy_readb(base_addr+(CyMSVR2<<index)));
#endif
                restore_flags(flags);
            }
            break;
        case TIOCMSET:
            if (arg & TIOCM_RTS){
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), CyDTR);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), CyRTS);
                }
                restore_flags(flags);
            }else{
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), ~CyDTR);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), ~CyRTS);
                }
                restore_flags(flags);
            }
            if (arg & TIOCM_DTR){
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), CyRTS);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), CyDTR);
                }
#ifdef CY_DEBUG_DTR
                printk("cyc:set_modem_info raising DTR\n");
                printk("     status: 0x%x, 0x%x\n",
                    cy_readb(base_addr+(CyMSVR1<<index)),
                    cy_readb(base_addr+(CyMSVR2<<index)));
#endif
                restore_flags(flags);
            }else{
                save_flags(flags); cli();
                cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
                if (info->rtsdtr_inv) {
                        cy_writeb((u_long)base_addr+(CyMSVR1<<index), ~CyRTS);
                } else {
                        cy_writeb((u_long)base_addr+(CyMSVR2<<index), ~CyDTR);
                }
 
#ifdef CY_DEBUG_DTR
                printk("cyc:set_modem_info dropping DTR\n");
                printk("     status: 0x%x, 0x%x\n",
                    cy_readb(base_addr+(CyMSVR1<<index)),
                    cy_readb(base_addr+(CyMSVR2<<index)));
#endif
                restore_flags(flags);
            }
            break;
        default:
            return -EINVAL;
        }
    } else {
        base_addr = (unsigned char*) (cy_card[card].base_addr);
 
        firm_id = (struct FIRM_ID *)
                    (cy_card[card].base_addr + ID_ADDRESS);
        if (ISZLOADED(cy_card[card])) {
            zfw_ctrl = (struct ZFW_CTRL *)
                (cy_card[card].base_addr + cy_readl(&firm_id->zfwctrl_addr));
            board_ctrl = &zfw_ctrl->board_ctrl;
            ch_ctrl = zfw_ctrl->ch_ctrl;
 
            switch (cmd) {
            case TIOCMBIS:
                if (arg & TIOCM_RTS){
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
                }
                if (arg & TIOCM_DTR){
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
#ifdef CY_DEBUG_DTR
                    printk("cyc:set_modem_info raising Z DTR\n");
#endif
                }
                break;
            case TIOCMBIC:
                if (arg & TIOCM_RTS){
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
                }
                if (arg & TIOCM_DTR){
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
#ifdef CY_DEBUG_DTR
                    printk("cyc:set_modem_info clearing Z DTR\n");
#endif
                }
                break;
            case TIOCMSET:
                if (arg & TIOCM_RTS){
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
                }else{
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
                }
                if (arg & TIOCM_DTR){
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
#ifdef CY_DEBUG_DTR
                    printk("cyc:set_modem_info raising Z DTR\n");
#endif
                }else{
                    cy_writel(&ch_ctrl[channel].rs_control,
                       cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
#ifdef CY_DEBUG_DTR
                    printk("cyc:set_modem_info clearing Z DTR\n");
#endif
                }
                break;
            default:
                return -EINVAL;
            }
        }else{
            return -ENODEV;
        }
        retval = cyz_issue_cmd(&cy_card[info->card],
                                    channel, C_CM_IOCTLM,0L);
        if (retval != 0){
            printk("cyc:set_modem_info retval at %d was %x\n",
                __LINE__, retval);
        }
    }
    return 0;
} /* set_modem_info */
 
 
static void
send_break( struct cyclades_port * info, int duration)
{
 
    if (!IS_CYC_Z(cy_card[info->card])) {
        /* Let the transmit ISR take care of this (since it
           requires stuffing characters into the output stream).
        */
        info->x_break = duration;
        if (!info->xmit_cnt ) {
            start_xmit(info);
        }
    } else {
        /* For the moment we ignore the duration parameter!!!
           A better implementation will use C_CM_SET_BREAK
           and C_CM_CLR_BREAK with the appropriate delay.
         */
#if 1
// this appears to wedge the output data stream
int retval;
        retval = cyz_issue_cmd(&cy_card[info->card],
                (info->line) - (cy_card[info->card].first_line),
                C_CM_SENDBRK, 0L);
        if (retval != 0){
            printk("cyc:send_break retval at %d was %x\n",
                __LINE__, retval);
        }
#endif
    }
} /* send_break */
 
 
static int
get_mon_info(struct cyclades_port * info, struct cyclades_monitor * mon)
{
 
    copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor));
    info->mon.int_count  = 0;
    info->mon.char_count = 0;
    info->mon.char_max   = 0;
    info->mon.char_last  = 0;
    return 0;
}/* get_mon_info */
 
 
static int
set_threshold(struct cyclades_port * info, unsigned long value)
{
  unsigned char *base_addr;
  int card,channel,chip,index;
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        info->cor3 &= ~CyREC_FIFO;
        info->cor3 |= value & CyREC_FIFO;
        cy_writeb((u_long)base_addr+(CyCOR3<<index), info->cor3);
        cyy_issue_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index);
    } else {
        // Nothing to do!
    }
    return 0;
}/* set_threshold */
 
 
static int
get_threshold(struct cyclades_port * info, unsigned long *value)
{
  unsigned char *base_addr;
  int card,channel,chip,index;
  unsigned long tmp;
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        tmp = cy_readb(base_addr+(CyCOR3<<index)) & CyREC_FIFO;
        cy_put_user(tmp,value);
    } else {
        // Nothing to do!
    }
    return 0;
}/* get_threshold */
 
 
static int
set_default_threshold(struct cyclades_port * info, unsigned long value)
{
    info->default_threshold = value & 0x0f;
    return 0;
}/* set_default_threshold */
 
 
static int
get_default_threshold(struct cyclades_port * info, unsigned long *value)
{
    cy_put_user(info->default_threshold,value);
    return 0;
}/* get_default_threshold */
 
 
static int
set_timeout(struct cyclades_port * info, unsigned long value)
{
  unsigned char *base_addr;
  int card,channel,chip,index;
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        cy_writeb((u_long)base_addr+(CyRTPR<<index), value & 0xff);
    } else {
        // Nothing to do!
    }
    return 0;
}/* set_timeout */
 
 
static int
get_timeout(struct cyclades_port * info, unsigned long *value)
{
  unsigned char *base_addr;
  int card,channel,chip,index;
  unsigned long tmp;
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        tmp = cy_readb(base_addr+(CyRTPR<<index));
        cy_put_user(tmp,value);
    } else {
        // Nothing to do!
    }
    return 0;
}/* get_timeout */
 
 
static int
set_default_timeout(struct cyclades_port * info, unsigned long value)
{
    info->default_timeout = value & 0xff;
    return 0;
}/* set_default_timeout */
 
 
static int
get_default_timeout(struct cyclades_port * info, unsigned long *value)
{
    cy_put_user(info->default_timeout,value);
    return 0;
}/* get_default_timeout */
 
/*
 * This routine allows the tty driver to implement device-
 * specific ioctl's.  If the ioctl number passed in cmd is
 * not recognized by the driver, it should return ENOIOCTLCMD.
 */
static int
cy_ioctl(struct tty_struct *tty, struct file * file,
            unsigned int cmd, unsigned long arg)
{
  int error;
  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
  int ret_val = 0;
 
#ifdef CY_DEBUG_OTHER
    printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
        info->line, cmd, arg); /* */
#endif
 
    switch (cmd) {
        case CYGETMON:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(struct cyclades_monitor));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = get_mon_info(info, (struct cyclades_monitor *)arg);
            break;
        case CYGETTHRESH:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(unsigned long));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = get_threshold(info, (unsigned long *)arg);
            break;
        case CYSETTHRESH:
            ret_val = set_threshold(info, (unsigned long)arg);
            break;
        case CYGETDEFTHRESH:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(unsigned long));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = get_default_threshold(info, (unsigned long *)arg);
            break;
        case CYSETDEFTHRESH:
            ret_val = set_default_threshold(info, (unsigned long)arg);
            break;
        case CYGETTIMEOUT:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(unsigned long));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = get_timeout(info, (unsigned long *)arg);
            break;
        case CYSETTIMEOUT:
            ret_val = set_timeout(info, (unsigned long)arg);
            break;
        case CYGETDEFTIMEOUT:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(unsigned long));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = get_default_timeout(info, (unsigned long *)arg);
            break;
        case CYSETDEFTIMEOUT:
            ret_val = set_default_timeout(info, (unsigned long)arg);
            break;
        case CYSETRFLOW:
            info->rflow = (int)arg;
            ret_val = 0;
            break;
        case CYGETRFLOW:
            ret_val = info->rflow;
            break;
        case CYSETRTSDTR_INV:
            info->rtsdtr_inv = (int)arg;
            ret_val = 0;
            break;
        case CYGETRTSDTR_INV:
            ret_val = info->rtsdtr_inv;
            break;
        case CYGETCARDINFO:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(struct cyclades_card));
            if (error){
                ret_val = error;
                break;
            }
            copy_to_user((void *)arg, (void *)&cy_card[info->card],
                         sizeof (struct cyclades_card));
            ret_val = 0;
            break;
        case CYGETCD1400VER:
            ret_val = info->chip_rev;
            break;
        case CYZSETPOLLCYCLE:
            cyz_polling_cycle = (arg * HZ) / 1000;
            ret_val = 0;
            break;
        case CYZGETPOLLCYCLE:
            ret_val = (cyz_polling_cycle * 1000) / HZ;
            break;
        case CYSETWAIT:
            info->closing_wait = (unsigned short)arg * HZ/100;
            ret_val = 0;
            break;
        case CYGETWAIT:
            ret_val = info->closing_wait / (HZ/100);
            break;
        case TCSBRK:    /* SVID version: non-zero arg --> no break */
            ret_val = tty_check_change(tty);
            if (ret_val)
                return ret_val;
            tty_wait_until_sent(tty,0);
            if (!arg)
                send_break(info, HZ/4); /* 1/4 second */
            break;
        case TCSBRKP:   /* support for POSIX tcsendbreak() */
            ret_val = tty_check_change(tty);
            if (ret_val)
                return ret_val;
            tty_wait_until_sent(tty,0);
            send_break(info, arg ? arg*(HZ/10) : HZ/4);
            break;
        case TIOCMBIS:
        case TIOCMBIC:
        case TIOCMSET:
            ret_val = set_modem_info(info, cmd, (unsigned int *) arg);
            break;
 
/* The following commands are incompletely implemented!!! */
        case TIOCGSOFTCAR:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(unsigned int *));
            if (error){
                ret_val = error;
                break;
            }
            cy_put_user(C_CLOCAL(tty) ? 1 : 0,
                        (unsigned long *) arg);
            break;
        case TIOCSSOFTCAR:
           error = verify_area(VERIFY_READ, (void *) arg
                                ,sizeof(unsigned long *));
           if (error) {
                ret_val = error;
                break;
           }
 
            arg = cy_get_user((unsigned long *) arg);
            tty->termios->c_cflag =
                    ((tty->termios->c_cflag & ~CLOCAL) |
                     (arg ? CLOCAL : 0));
            break;
        case TIOCMGET:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(unsigned int *));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = get_modem_info(info, (unsigned int *) arg);
            break;
        case TIOCGSERIAL:
            error = verify_area(VERIFY_WRITE, (void *) arg
                                ,sizeof(struct serial_struct));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = get_serial_info(info,
                                   (struct serial_struct *) arg);
            break;
        case TIOCSSERIAL:
            error = verify_area(VERIFY_READ, (void *) arg
                                ,sizeof(struct serial_struct));
            if (error){
                ret_val = error;
                break;
            }
            ret_val = set_serial_info(info,
                                   (struct serial_struct *) arg);
            break;
        default:
            ret_val = -ENOIOCTLCMD;
    }
 
#ifdef CY_DEBUG_OTHER
    printk(" cyc:cy_ioctl done\n");
#endif
 
    return ret_val;
} /* cy_ioctl */
 
 
/*
 * This routine allows the tty driver to be notified when
 * device's termios settings have changed.  Note that a
 * well-designed tty driver should be prepared to accept the case
 * where old == NULL, and try to do something rational.
 */
static void
cy_set_termios(struct tty_struct *tty, struct termios * old_termios)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
 
#ifdef CY_DEBUG_OTHER
    printk("cyc:cy_set_termios ttyC%d\n", info->line);
#endif
 
    if (tty->termios->c_cflag == old_termios->c_cflag)
        return;
    set_line_char(info);
 
    if ((old_termios->c_cflag & CRTSCTS) &&
        !(tty->termios->c_cflag & CRTSCTS)) {
            tty->stopped = 0;
            cy_start(tty);
    }
#ifdef tytso_patch_94Nov25_1726
    if (!(old_termios->c_cflag & CLOCAL) &&
        (tty->termios->c_cflag & CLOCAL))
            wake_up_interruptible(&info->open_wait);
#endif
 
    return;
} /* cy_set_termios */
 
 
/*
 * void (*set_ldisc)(struct tty_struct *tty);
 *
 *      This routine allows the tty driver to be notified when the
 *      device's termios settings have changed.
 *
 */
 
 
/* This routine is called by the upper-layer tty layer to signal
   that incoming characters should be throttled because the input
   buffers are close to full.
 */
static void
cy_throttle(struct tty_struct * tty)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  unsigned long flags;
  unsigned char *base_addr;
  int card,chip,channel,index;
 
#ifdef CY_DEBUG_THROTTLE
  char buf[64];
 
    printk("cyc:throttle %s: %d....ttyC%d\n",
           _tty_name(tty, buf),
           tty->ldisc.chars_in_buffer(tty), info->line);
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_throttle")){
            return;
    }
 
    if (I_IXOFF(tty)) {
        info->x_char = STOP_CHAR(tty);
            /* Should use the "Send Special Character" feature!!! */
    }
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
        cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
        if (info->rtsdtr_inv) {
                cy_writeb((u_long)base_addr+(CyMSVR2<<index), ~CyDTR);
        } else {
                cy_writeb((u_long)base_addr+(CyMSVR1<<index), ~CyRTS);
        }
        restore_flags(flags);
    } else {
        // Nothing to do!
    }
 
    return;
} /* cy_throttle */
 
 
/*
 * This routine notifies the tty driver that it should signal
 * that characters can now be sent to the tty without fear of
 * overrunning the input buffers of the line disciplines.
 */
static void
cy_unthrottle(struct tty_struct * tty)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  unsigned long flags;
  unsigned char *base_addr;
  int card,chip,channel,index;
 
#ifdef CY_DEBUG_THROTTLE
  char buf[64];
 
    printk("cyc:unthrottle %s: %d....ttyC%d\n",
           _tty_name(tty, buf),
           tty->ldisc.chars_in_buffer(tty), info->line);
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_unthrottle")){
            return;
    }
 
    if (I_IXOFF(tty)) {
        if (info->x_char)
            info->x_char = 0;
        else
            info->x_char = START_CHAR(tty);
            /* Should use the "Send Special Character" feature!!! */
    }
 
    card = info->card;
    channel = info->line - cy_card[card].first_line;
    if (!IS_CYC_Z(cy_card[card])) {
        chip = channel>>2;
        channel &= 0x03;
        index = cy_card[card].bus_index;
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
        cy_writeb((u_long)base_addr+(CyCAR<<index), (u_char)channel);
        if (info->rtsdtr_inv) {
                cy_writeb((u_long)base_addr+(CyMSVR2<<index), CyDTR);
        } else {
                cy_writeb((u_long)base_addr+(CyMSVR1<<index), CyRTS);
        }
        restore_flags(flags);
    }else{
        // Nothing to do!
    }
 
    return;
} /* cy_unthrottle */
 
 
/* cy_start and cy_stop provide software output flow control as a
   function of XON/XOFF, software CTS, and other such stuff.
*/
static void
cy_stop(struct tty_struct *tty)
{
  struct cyclades_card *cinfo;
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  unsigned char *base_addr;
  int chip,channel,index;
  unsigned long flags;
 
#ifdef CY_DEBUG_OTHER
    printk("cyc:cy_stop ttyC%d\n", info->line); /* */
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_stop"))
        return;
 
    cinfo = &cy_card[info->card];
    channel = info->line - cinfo->first_line;
    if (!IS_CYC_Z(*cinfo)) {
        index = cinfo->bus_index;
        chip = channel>>2;
        channel &= 0x03;
        base_addr = (unsigned char*)
                   (cy_card[info->card].base_addr
                           + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
            cy_writeb((u_long)base_addr+(CyCAR<<index),
               (u_char)(channel & 0x0003)); /* index channel */
            cy_writeb((u_long)base_addr+(CySRER<<index),
               cy_readb(base_addr+(CySRER<<index)) & ~CyTxMpty);
        restore_flags(flags);
    } else {
        // Nothing to do!
    }
 
    return;
} /* cy_stop */
 
 
static void
cy_start(struct tty_struct *tty)
{
  struct cyclades_card *cinfo;
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  unsigned char *base_addr;
  int chip,channel,index;
  unsigned long flags;
 
#ifdef CY_DEBUG_OTHER
    printk("cyc:cy_start ttyC%d\n", info->line); /* */
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_start"))
        return;
 
    cinfo = &cy_card[info->card];
    channel = info->line - cinfo->first_line;
    index = cinfo->bus_index;
    if (!IS_CYC_Z(*cinfo)) {
        chip = channel>>2;
        channel &= 0x03;
        base_addr = (unsigned char*)
                       (cy_card[info->card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
        save_flags(flags); cli();
            cy_writeb((u_long)base_addr+(CyCAR<<index),
               (u_char)(channel & 0x0003)); /* index channel */
            cy_writeb((u_long)base_addr+(CySRER<<index),
               cy_readb(base_addr+(CySRER<<index)) | CyTxMpty);
        restore_flags(flags);
    } else {
        // Nothing to do!
    }
 
    return;
} /* cy_start */
 
 
static void
cy_flush_buffer(struct tty_struct *tty)
{
  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
  int card, channel;
  unsigned long flags;
 
#ifdef CY_DEBUG_IO
    printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_flush_buffer"))
        return;
    save_flags(flags); cli();
    info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
    restore_flags(flags);
 
    card = info->card;
    channel = (info->line) - (cy_card[card].first_line);
 
    if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
                                      buffers as well */
        static volatile struct FIRM_ID *firm_id;
        static volatile struct ZFW_CTRL *zfw_ctrl;
        static volatile struct CH_CTRL *ch_ctrl;
        static volatile struct BUF_CTRL *buf_ctrl;
 
        firm_id = (struct FIRM_ID *)(cy_card[card].base_addr + ID_ADDRESS);
        zfw_ctrl = (struct ZFW_CTRL *) (cy_card[card].base_addr +
                                cy_readl(&firm_id->zfwctrl_addr));
        ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
        buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
 
        while (cy_readl(&buf_ctrl->tx_get) != cy_readl(&buf_ctrl->tx_put))
                cy_writel(&buf_ctrl->tx_put, cy_readl(&buf_ctrl->tx_get));
    }
    wake_up_interruptible(&tty->write_wait);
    if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
        && tty->ldisc.write_wakeup)
            (tty->ldisc.write_wakeup)(tty);
} /* cy_flush_buffer */
 
 
/*
 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
 */
static void
cy_hangup(struct tty_struct *tty)
{
  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
 
#ifdef CY_DEBUG_OTHER
    printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
#endif
 
    if (serial_paranoia_check(info, tty->device, "cy_hangup"))
        return;
 
    cy_flush_buffer(tty);
    shutdown(info);
    info->event = 0;
    info->count = 0;
#ifdef CY_DEBUG_COUNT
    printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
#endif
    info->tty = 0;
    info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
    wake_up_interruptible(&info->open_wait);
} /* cy_hangup */
 
 
/*
 * ---------------------------------------------------------------------
 * cy_init() and friends
 *
 * cy_init() is called at boot-time to initialize the serial driver.
 * ---------------------------------------------------------------------
 */
 
/* initialize chips on Cyclom-Y card -- return number of valid
   chips (which is number of ports/4) */
__initfunc(static unsigned short
cyy_init_card(volatile ucchar *true_base_addr,int index))
{
  unsigned int chip_number;
  volatile ucchar* base_addr;
 
    cy_writeb((u_long)true_base_addr+(Cy_HwReset<<index), 0);
                                                /* Cy_HwReset is 0x1400 */
    cy_writeb((u_long)true_base_addr+(Cy_ClrIntr<<index), 0);
                                                /* Cy_ClrIntr is 0x1800 */
    udelay(500L);
 
    for(chip_number=0; chip_number<CyMAX_CHIPS_PER_CARD; chip_number++){
        base_addr = true_base_addr
                       + (cy_chip_offset[chip_number]<<index);
        udelay(1000L);
        if(cy_readb(base_addr+(CyCCR<<index)) != 0x00){
            /*************
            printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
               chip_number, (unsigned long)base_addr);
            *************/
            return chip_number;
        }
 
        cy_writeb((u_long)base_addr+(CyGFRCR<<index), 0);
        udelay(10L);
 
        /* The Cyclom-16Y does not decode address bit 9 and therefore
           cannot distinguish between references to chip 0 and a non-
           existent chip 4.  If the preceding clearing of the supposed
           chip 4 GFRCR register appears at chip 0, there is no chip 4
           and this must be a Cyclom-16Y, not a Cyclom-32Ye.
        */
        if (chip_number == 4
        && cy_readb(true_base_addr
            + (cy_chip_offset[0]<<index)
            + (CyGFRCR<<index)) == 0){
            return chip_number;
        }
 
        cy_writeb((u_long)base_addr+(CyCCR<<index), CyCHIP_RESET);
        udelay(1000L);
 
        if(cy_readb(base_addr+(CyGFRCR<<index)) == 0x00){
            /*
            printk(" chip #%d at %#6lx is not responding ",
               chip_number, (unsigned long)base_addr);
            printk("(GFRCR stayed 0)\n",
            */
            return chip_number;
        }
        if((0xf0 & (cy_readb(base_addr+(CyGFRCR<<index)))) != 0x40){
            /*
            printk(" chip #%d at %#6lx is not valid (GFRCR == %#2x)\n",
               chip_number, (unsigned long)base_addr,
               base_addr[CyGFRCR<<index]);
            */
            return chip_number;
        }
        cy_writeb((u_long)base_addr+(CyGCR<<index), CyCH0_SERIAL);
        if (cy_readb(base_addr+(CyGFRCR<<index)) >= CD1400_REV_J){
            /* It is a CD1400 rev. J or later */
            /* Impossible to reach 5ms with this chip.
               Changed to 2ms instead (f = 500 Hz). */
            cy_writeb((u_long)base_addr+(CyPPR<<index), CyCLOCK_60_2MS);
        } else {
            /* f = 200 Hz */
            cy_writeb((u_long)base_addr+(CyPPR<<index), CyCLOCK_25_5MS);
        }
 
    /*
        printk(" chip #%d at %#6lx is rev 0x%2x\n",
               chip_number, (unsigned long)base_addr,
               cy_readb(base_addr+(CyGFRCR<<index)));
    */
    }
    return chip_number;
} /* cyy_init_card */
 
/*
 * ---------------------------------------------------------------------
 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
 * sets global variables and return the number of ISA boards found.
 * ---------------------------------------------------------------------
 */
__initfunc(static int
cy_detect_isa(void))
{
  unsigned short        cy_isa_irq,nboard;
  volatile ucchar       *cy_isa_address;
  unsigned short        i,j,cy_isa_nchan;
 
        nboard = 0;
 
        /* scan the address table probing for Cyclom-Y/ISA boards */
        for (i = 0 ; i < NR_ISA_ADDRS ; i++) {
                cy_isa_address = cy_isa_addresses[i];
                if (cy_isa_address  == 0x0000) {
                        return(nboard);
                }
 
                /* probe for CD1400... */
 
                cy_isa_nchan = CyPORTS_PER_CHIP *
                     cyy_init_card(cy_isa_address,0);
                if (cy_isa_nchan == 0) {
                        continue;
                }
 
                /* find out the board's irq by probing */
                cy_isa_irq = do_auto_irq(cy_isa_address);
                if (cy_isa_irq == 0) {
                        printk("Cyclom-Y/ISA found at 0x%lx ",
                                (unsigned long) cy_isa_address);
                        printk("but the IRQ could not be detected.\n");
                        continue;
                }
 
                if((cy_next_channel+cy_isa_nchan) > NR_PORTS) {
                        printk("Cyclom-Y/ISA found at 0x%lx ",
                                (unsigned long) cy_isa_address);
                        printk("but no more channels are available.\n");
                        printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
                        return(nboard);
                }
                /* fill the next cy_card structure available */
                for (j = 0 ; j < NR_CARDS ; j++) {
                        if (cy_card[j].base_addr == 0)  break;
                }
                if (j == NR_CARDS) {    /* no more cy_cards available */
                        printk("Cyclom-Y/ISA found at 0x%lx ",
                                (unsigned long) cy_isa_address);
                        printk("but no more cards can be used .\n");
                        printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
                        return(nboard);
                }
 
                /* allocate IRQ */
                if(request_irq(cy_isa_irq, cyy_interrupt,
                                   SA_INTERRUPT, "cyclomY", NULL))
                {
                        printk("Cyclom-Y/ISA found at 0x%lx ",
                                (unsigned long) cy_isa_address);
                        printk("but could not allocate IRQ#%d.\n",
                                cy_isa_irq);
                        return(nboard);
                }
 
                /* set cy_card */
                cy_card[j].base_addr = (u_long) cy_isa_address;
                cy_card[j].ctl_addr = 0;
                cy_card[j].irq = (int) cy_isa_irq;
                cy_card[j].bus_index = 0;
                cy_card[j].first_line = cy_next_channel;
                cy_card[j].num_chips = cy_isa_nchan/4;
                IRQ_cards[cy_isa_irq] = &cy_card[j];
                nboard++;
 
                /* print message */
                printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
                    j+1, (unsigned long) cy_isa_address,
                    (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
                    cy_isa_irq);
                printk("%d channels starting from port %d.\n",
                        cy_isa_nchan, cy_next_channel);
                cy_next_channel += cy_isa_nchan;
        }
        return(nboard);
 
} /* cy_detect_isa */
 
/*
 * ---------------------------------------------------------------------
 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
 * sets global variables and return the number of PCI boards found.
 * ---------------------------------------------------------------------
 */
__initfunc(static int
cy_detect_pci(void))
{
#ifdef CONFIG_PCI
  unsigned char         cyy_bus, cyy_dev_fn, cyy_rev_id;
  unsigned char         cy_pci_irq;
  uclong                cy_pci_addr0, cy_pci_addr1, cy_pci_addr2;
  unsigned short        i,j,cy_pci_nchan, plx_ver;
  unsigned short        device_id,dev_index = 0,board_index = 0;
  uclong                mailbox;
  uclong                Ze_addr0[NR_CARDS], Ze_addr2[NR_CARDS], ZeIndex = 0;
 
        if(pcibios_present() == 0) {    /* PCI bus not present */
                return(0);
        }
        for (i = 0; i < NR_CARDS; i++) {
                /* look for a Cyclades card by vendor and device id */
                while((device_id = cy_pci_dev_id[dev_index]) != 0) {
                        if(pcibios_find_device(PCI_VENDOR_ID_CYCLADES,
                                        device_id,board_index,
                                        &cyy_bus, &cyy_dev_fn) != 0)
                        {
                                dev_index++;    /* try next device id */
                                board_index = 0;
                        } else {
                                board_index++;
                                break;          /* found a board */
                        }
                }
 
                if (device_id == 0)
                    break;
 
                /* read PCI configuration area */
                pcibios_read_config_byte(cyy_bus, cyy_dev_fn,
                                 PCI_INTERRUPT_LINE, &cy_pci_irq);
                pcibios_read_config_dword(cyy_bus, cyy_dev_fn,
                                  PCI_BASE_ADDRESS_0,
                                  (unsigned int *) &cy_pci_addr0);
                pcibios_read_config_dword(cyy_bus, cyy_dev_fn,
                                  PCI_BASE_ADDRESS_1,
                                  (unsigned int *) &cy_pci_addr1);
                pcibios_read_config_dword(cyy_bus, cyy_dev_fn,
                                  PCI_BASE_ADDRESS_2,
                                  (unsigned int *) &cy_pci_addr2);
                pcibios_read_config_byte(cyy_bus, cyy_dev_fn,
                                  PCI_REVISION_ID, &cyy_rev_id);
 
                device_id &= ~PCI_DEVICE_ID_MASK;
 
    if ((device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo)
           || (device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi)){
#ifdef CY_PCI_DEBUG
            printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
                cyy_bus, cyy_dev_fn);
            printk("rev_id=%d) IRQ%d\n",
                cyy_rev_id, (int)cy_pci_irq);
            printk("Cyclom-Y/PCI:found  winaddr=0x%lx ctladdr=0x%lx\n",
                (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
#endif
                cy_pci_addr0  &= PCI_BASE_ADDRESS_MEM_MASK;
                cy_pci_addr2  &= PCI_BASE_ADDRESS_MEM_MASK;
 
#if defined(__alpha__)
                if (device_id  == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
                    printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
                        cyy_bus, cyy_dev_fn);
                    printk("rev_id=%d) IRQ%d\n",
                        cyy_rev_id, (int)cy_pci_irq);
                    printk("Cyclom-Y/PCI:found  winaddr=0x%lx ctladdr=0x%lx\n",
                        (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
                    printk("Cyclom-Y/PCI not supported for low addresses in "
                           "Alpha systems.\n");
                    i--;
                    continue;
                }
#else
                cy_pci_addr0 = (ulong)ioremap(cy_pci_addr0 & PAGE_MASK,
                                        PAGE_ALIGN(CyPCI_Yctl))
                                + (cy_pci_addr0 & (PAGE_SIZE-1));
                if ((ulong)cy_pci_addr2 >= 0x100000)  /* above 1M? */
                    cy_pci_addr2 = (ulong) ioremap(cy_pci_addr2, CyPCI_Ywin);
#endif
 
#ifdef CY_PCI_DEBUG
            printk("Cyclom-Y/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
                (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
#endif
                cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
                       cyy_init_card((volatile ucchar *)cy_pci_addr2, 1));
                if(cy_pci_nchan == 0) {
                        printk("Cyclom-Y PCI host card with ");
                        printk("no Serial-Modules at 0x%lx.\n",
                            (ulong) cy_pci_addr2);
                        i--;
                        continue;
                }
                if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
                        printk("Cyclom-Y/PCI found at 0x%lx ",
                            (ulong) cy_pci_addr2);
                        printk("but no channels are available.\n");
                        printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
                        return(i);
                }
                /* fill the next cy_card structure available */
                for (j = 0 ; j < NR_CARDS ; j++) {
                        if (cy_card[j].base_addr == 0)  break;
                }
                if (j == NR_CARDS) {    /* no more cy_cards available */
                        printk("Cyclom-Y/PCI found at 0x%lx ",
                            (ulong) cy_pci_addr2);
                        printk("but no more cards can be used.\n");
                        printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
                        return(i);
                }
 
                /* allocate IRQ */
                if(request_irq(cy_pci_irq, cyy_interrupt,
                        SA_INTERRUPT, "cyclomY", NULL))
                {
                        printk("Cyclom-Y/PCI found at 0x%lx ",
                            (ulong) cy_pci_addr2);
                        printk("but could not allocate IRQ%d.\n",
                            cy_pci_irq);
                        return(i);
                }
 
                /* set cy_card */
                cy_card[j].base_addr = (ulong)cy_pci_addr2;
                cy_card[j].ctl_addr = (ulong)cy_pci_addr0;
                cy_card[j].irq = (int) cy_pci_irq;
                cy_card[j].bus_index = 1;
                cy_card[j].first_line = cy_next_channel;
                cy_card[j].num_chips = cy_pci_nchan/4;
                IRQ_cards[cy_pci_irq] = &cy_card[j];
 
                /* enable interrupts in the PCI interface */
                plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
                switch (plx_ver) {
                    case PLX_9050:
 
                    cy_writew(cy_pci_addr0+0x4c,
                        cy_readw(cy_pci_addr0+0x4c)|0x0040);
                    break;
 
                    case PLX_9060:
                    case PLX_9080:
                    default: /* Old boards, use PLX_9060 */
 
                    cy_writew(cy_pci_addr0+0x68,
                        cy_readw(cy_pci_addr0+0x68)|0x0900);
                    break;
                }
 
                /* print message */
                printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
                       j+1,
                       (ulong)cy_pci_addr2,
                       (ulong)(cy_pci_addr2 + CyPCI_Ywin - 1),
                       (int)cy_pci_irq);
                printk("%d channels starting from port %d.\n",
                    cy_pci_nchan, cy_next_channel);
 
                cy_next_channel += cy_pci_nchan;
    }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo){
            /* print message */
                printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
                    cyy_bus, cyy_dev_fn);
                printk("rev_id=%d) IRQ%d\n",
                    cyy_rev_id, (int)cy_pci_irq);
                printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
                    (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
            printk("Cyclades-Z/PCI not supported for low addresses\n");
            break;
    }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi){
#ifdef CY_PCI_DEBUG
            printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
                cyy_bus, cyy_dev_fn);
            printk("rev_id=%d) IRQ%d\n",
                cyy_rev_id, (int)cy_pci_irq);
            printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
                (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
#endif
                cy_pci_addr0 &= PCI_BASE_ADDRESS_MEM_MASK;
#if !defined(__alpha__)
                cy_pci_addr0 = (unsigned int) ioremap(
                               cy_pci_addr0 & PAGE_MASK,
                               PAGE_ALIGN(CyPCI_Zctl))
                               + (cy_pci_addr0 & (PAGE_SIZE-1));
#endif
                mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 *)
                           cy_pci_addr0)->mail_box_0);
                cy_pci_addr2 &= PCI_BASE_ADDRESS_MEM_MASK;
                if (mailbox == ZE_V1) {
#if !defined(__alpha__)
                    cy_pci_addr2 = (unsigned int) ioremap(
                        cy_pci_addr2 & PAGE_MASK,
                        PAGE_ALIGN(CyPCI_Ze_win))
                        + (cy_pci_addr2 & (PAGE_SIZE-1));
#endif
                    if (ZeIndex == NR_CARDS) {
                        printk("Cyclades-Ze/PCI found at 0x%lx ",
                                (ulong)cy_pci_addr2);
                        printk("but no more cards can be used.\n");
                        printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
                    } else {
                        Ze_addr0[ZeIndex] = cy_pci_addr0;
                        Ze_addr2[ZeIndex] = cy_pci_addr2;
                        ZeIndex++;
                    }
                    i--;
                    continue;
                } else {
#if !defined(__alpha__)
                    cy_pci_addr2 = (unsigned int) ioremap(
                        cy_pci_addr2 & PAGE_MASK,
                        PAGE_ALIGN(CyPCI_Zwin))
                        + (cy_pci_addr2 & (PAGE_SIZE-1));
#endif
                }
 
#ifdef CY_PCI_DEBUG
            printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
                (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
            if (mailbox == ZO_V1) {
                cy_writel(&((struct RUNTIME_9060 *)
                          (cy_pci_addr0))->loc_addr_base, WIN_CREG);
                PAUSE
                printk("Cyclades-8Zo/PCI: FPGA id %lx, ver %lx\n",
                       (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
                        (cy_pci_addr2))->fpga_id)),
                       (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
                        (cy_pci_addr2))->fpga_version)));
                cy_writel(&((struct RUNTIME_9060 *)
                          (cy_pci_addr0))->loc_addr_base, WIN_RAM);
            } else {
                printk("Cyclades-Z/PCI: New Cyclades-Z board.  FPGA not loaded\n");
            }
#endif
            /* The following clears the firmware id word.  This ensures
               that the driver will not attempt to talk to the board
               until it has been properly initialized.
             */
                PAUSE
                if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
                    cy_writel((ulong)(cy_pci_addr2+ID_ADDRESS), 0L);
 
                /* This must be a Cyclades-8Zo/PCI.  The extendable
                   version will have a different device_id and will
                   be allocated its maximum number of ports. */
                cy_pci_nchan = 8;
 
                if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
                        printk("Cyclades-8Zo/PCI found at 0x%lx ",
                            (ulong)cy_pci_addr2);
                        printk("but no channels are available.\n");
                        printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
                        return(i);
                }
 
                /* fill the next cy_card structure available */
                for (j = 0 ; j < NR_CARDS ; j++) {
                        if (cy_card[j].base_addr == 0)  break;
                }
                if (j == NR_CARDS) {    /* no more cy_cards available */
                    printk("Cyclades-8Zo/PCI found at 0x%lx ",
                        (ulong)cy_pci_addr2);
                    printk("but no more cards can be used.\n");
                    printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
                    return(i);
                }
 
                /* allocate IRQ only if board has an IRQ */
                if( (1 < cy_pci_irq) && (cy_pci_irq < 15) ) {
                    if(request_irq(cy_pci_irq,cyz_interrupt,
                        SA_INTERRUPT,"cyclomZ",NULL))
                    {
                        printk("Could not allocate IRQ%d ",
                            cy_pci_irq);
                        printk("for Cyclades-8Zo/PCI at 0x%lx.\n",
                            (ulong)cy_pci_addr2);
                        return(i);
                    }
                }
 
 
                /* set cy_card */
                cy_card[j].base_addr = cy_pci_addr2;
                cy_card[j].ctl_addr = cy_pci_addr0;
                cy_card[j].irq = (int) cy_pci_irq;
                cy_card[j].bus_index = 1;
                cy_card[j].first_line = cy_next_channel;
                cy_card[j].num_chips = -1;
                IRQ_cards[cy_pci_irq] = &cy_card[j];
 
                /* print message */
                /* don't report IRQ if board is no IRQ */
                if( (cy_pci_irq < 15) && (cy_pci_irq > 1) ) {
                    printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
                        j+1,(ulong)cy_pci_addr2,
                        (ulong)(cy_pci_addr2 + CyPCI_Zwin - 1),
                        (int)cy_pci_irq);
                }else{
                    printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
                        j+1,(ulong)cy_pci_addr2,
                        (ulong)(cy_pci_addr2 + CyPCI_Zwin - 1));
                }
                printk("%d channels starting from port %d.\n",
                    cy_pci_nchan,cy_next_channel);
                cy_next_channel += cy_pci_nchan;
    }
        }
 
        for (; ZeIndex != 0 && i < NR_CARDS; i++) {
            cy_pci_addr0 = Ze_addr0[0];
            cy_pci_addr2 = Ze_addr2[0];
            for (j = 0 ; j < ZeIndex-1 ; j++) {
                Ze_addr0[j] = Ze_addr0[j+1];
                Ze_addr2[j] = Ze_addr2[j+1];
            }
            ZeIndex--;
                mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 *)
                                           cy_pci_addr0)->mail_box_0);
#ifdef CY_PCI_DEBUG
            printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
                (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
            printk("Cyclades-Z/PCI: New Cyclades-Z board.  FPGA not loaded\n");
#endif
            /* The following clears the firmware id word.  This ensures
               that the driver will not attempt to talk to the board
               until it has been properly initialized.
             */
                PAUSE
                /* This must be the new Cyclades-Ze/PCI. */
                cy_pci_nchan = ZE_V1_NPORTS;
 
                if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
                        printk("Cyclades-Ze/PCI found at 0x%lx ",
                            (ulong)cy_pci_addr2);
                        printk("but no channels are available.\n");
                        printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
                        return(i);
                }
 
                /* fill the next cy_card structure available */
                for (j = 0 ; j < NR_CARDS ; j++) {
                        if (cy_card[j].base_addr == 0)  break;
                }
                if (j == NR_CARDS) {    /* no more cy_cards available */
                    printk("Cyclades-Ze/PCI found at 0x%lx ",
                        (ulong)cy_pci_addr2);
                    printk("but no more cards can be used.\n");
                    printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
                    return(i);
                }
 
                /* allocate IRQ only if board has an IRQ */
                if( (1 < cy_pci_irq) && (cy_pci_irq < 15) ) {
                    if(request_irq(cy_pci_irq,cyz_interrupt,
                        SA_INTERRUPT,"cyclomZ",NULL))
                    {
                        printk("Could not allocate IRQ%d ",
                            cy_pci_irq);
                        printk("for Cyclades-Ze/PCI at 0x%lx.\n",
                            (ulong) cy_pci_addr2);
                        return(i);
                    }
                }
 
                /* set cy_card */
                cy_card[j].base_addr = cy_pci_addr2;
                cy_card[j].ctl_addr = cy_pci_addr0;
                cy_card[j].irq = (int) cy_pci_irq;
                cy_card[j].bus_index = 1;
                cy_card[j].first_line = cy_next_channel;
                cy_card[j].num_chips = -1;
                IRQ_cards[cy_pci_irq] = &cy_card[j];
 
                /* print message */
                /* don't report IRQ if board is no IRQ */
                if( (cy_pci_irq < 15) && (cy_pci_irq > 1) ) {
                    printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
                        j+1,(ulong)cy_pci_addr2,
                        (ulong)(cy_pci_addr2 + CyPCI_Ze_win - 1),
                        (int)cy_pci_irq);
                }else{
                    printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
                        j+1,(ulong)cy_pci_addr2,
                        (ulong)(cy_pci_addr2 + CyPCI_Ze_win - 1));
                }
                printk("%d channels starting from port %d.\n",
                    cy_pci_nchan,cy_next_channel);
                cy_next_channel += cy_pci_nchan;
        }
        if (ZeIndex != 0) {
            printk("Cyclades-Ze/PCI found at 0x%x ",
                (unsigned int) Ze_addr2[0]);
            printk("but no more cards can be used.\n");
            printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
        }
        return(i);
#else
        return(0);
#endif /* ifdef CONFIG_PCI */
} /* cy_detect_pci */
 
 
/*
 * This routine prints out the appropriate serial driver version number
 * and identifies which options were configured into this driver.
 */
static inline void
show_version(void)
{
  char *rcsvers, *rcsdate, *tmp;
    rcsvers = strchr(rcsid, ' '); rcsvers++;
    tmp = strchr(rcsvers, ' '); *tmp++ = '\0';
    rcsdate = strchr(tmp, ' '); rcsdate++;
    tmp = strrchr(rcsdate, ' '); *tmp = '\0';
    printk("Cyclades driver %s %s\n",
        rcsvers, rcsdate);
    printk("        built %s %s\n",
        __DATE__, __TIME__);
} /* show_version */
 
#if defined(CONFIG_PROC_FS) && !defined(MODULE)
int cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
                          int dummy)
{
    struct cyclades_port  *info;
    int i;
    int len=0;
    off_t begin=0;
    off_t pos=0;
    int size;
    __u32 cur_jifs = jiffies;
 
    size = sprintf(buf+len, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   IdleIn  Overruns  Ldisc\n");
 
    len += size;
    pos += size;
 
    /* Output one line for each known port */
    for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
        info = &cy_port[i];
 
        if (info->count)
            size = sprintf(buf+len,
                        "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6d\n",
                        info->line,
                        JIFFIES_DIFF(info->idle_stats.in_use, cur_jifs) / HZ,
                        info->idle_stats.xmit_bytes,
                        JIFFIES_DIFF(info->idle_stats.xmit_idle, cur_jifs) / HZ,
                        info->idle_stats.recv_bytes,
                        JIFFIES_DIFF(info->idle_stats.recv_idle, cur_jifs) / HZ,
                        info->idle_stats.overruns,
                        info->tty->ldisc.num);
        else
            size = sprintf(buf+len,
                        "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
                        info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
        len += size;
        pos = begin + len;
 
        if (pos < offset) {
            len   = 0;
            begin = pos;
        }
        if (pos > offset + length)
            break;
    }
 
    *start = buf + (offset - begin);    /* Start of wanted data */
    len -= (offset - begin);            /* Start slop */
    if (len > length)
        len = length;                   /* Ending slop */
    return len;
}
#endif
 
 
/* The serial driver boot-time initialization code!
    Hardware I/O ports are mapped to character special devices on a
    first found, first allocated manner.  That is, this code searches
    for Cyclom cards in the system.  As each is found, it is probed
    to discover how many chips (and thus how many ports) are present.
    These ports are mapped to the tty ports 32 and upward in monotonic
    fashion.  If an 8-port card is replaced with a 16-port card, the
    port mapping on a following card will shift.
 
    This approach is different from what is used in the other serial
    device driver because the Cyclom is more properly a multiplexer,
    not just an aggregation of serial ports on one card.
 
    If there are more cards with more ports than have been
    statically allocated above, a warning is printed and the
    extra ports are ignored.
 */
 
__initfunc(int
cy_init(void))
{
  struct cyclades_port  *info;
  struct cyclades_card *cinfo;
  int number_z_boards = 0;
  int board,port,i,index;
  unsigned long mailbox;
  unsigned short chip_number;
  int nports;
 
    show_version();
 
    /* Initialize the tty_driver structure */
 
    memset(&cy_serial_driver, 0, sizeof(struct tty_driver));
    cy_serial_driver.magic = TTY_DRIVER_MAGIC;
    cy_serial_driver.name = "ttyC";
    cy_serial_driver.major = CYCLADES_MAJOR;
    cy_serial_driver.minor_start = 0;
    cy_serial_driver.num = NR_PORTS;
    cy_serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
    cy_serial_driver.subtype = SERIAL_TYPE_NORMAL;
    cy_serial_driver.init_termios = tty_std_termios;
    cy_serial_driver.init_termios.c_cflag =
            B9600 | CS8 | CREAD | HUPCL | CLOCAL;
    cy_serial_driver.flags = TTY_DRIVER_REAL_RAW;
    cy_serial_driver.refcount = &serial_refcount;
    cy_serial_driver.table = serial_table;
    cy_serial_driver.termios = serial_termios;
    cy_serial_driver.termios_locked = serial_termios_locked;
    cy_serial_driver.open = cy_open;
    cy_serial_driver.close = cy_close;
    cy_serial_driver.write = cy_write;
    cy_serial_driver.put_char = cy_put_char;
    cy_serial_driver.flush_chars = cy_flush_chars;
    cy_serial_driver.write_room = cy_write_room;
    cy_serial_driver.chars_in_buffer = cy_chars_in_buffer;
    cy_serial_driver.flush_buffer = cy_flush_buffer;
    cy_serial_driver.ioctl = cy_ioctl;
    cy_serial_driver.throttle = cy_throttle;
    cy_serial_driver.unthrottle = cy_unthrottle;
    cy_serial_driver.set_termios = cy_set_termios;
    cy_serial_driver.stop = cy_stop;
    cy_serial_driver.start = cy_start;
    cy_serial_driver.hangup = cy_hangup;
 
    /*
     * The callout device is just like normal device except for
     * major number and the subtype code.
     */
    cy_callout_driver = cy_serial_driver;
    cy_callout_driver.name = "cub";
    cy_callout_driver.major = CYCLADESAUX_MAJOR;
    cy_callout_driver.subtype = SERIAL_TYPE_CALLOUT;
 
    if (tty_register_driver(&cy_serial_driver))
            panic("Couldn't register Cyclades serial driver\n");
    if (tty_register_driver(&cy_callout_driver))
            panic("Couldn't register Cyclades callout driver\n");
 
    init_bh(CYCLADES_BH, do_cyclades_bh);
 
    for (i = 0; i < 16; i++) {
            IRQ_cards[i] = 0;
    }
 
    for (i = 0; i < NR_CARDS; i++) {
            /* base_addr=0 indicates board not found */
            cy_card[i].base_addr = 0;
    }
 
    /* the code below is responsible to find the boards. Each different
       type of board has its own detection routine. If a board is found,
       the next cy_card structure available is set by the detection
       routine. These functions are responsible for checking the
       availability of cy_card and cy_port data structures and updating
       the cy_next_channel. */
 
    /* look for isa boards */
    cy_isa_nboard = cy_detect_isa();
 
    /* look for pci boards */
    cy_pci_nboard = cy_detect_pci();
 
    cy_nboard = cy_isa_nboard + cy_pci_nboard;
 
    /* invalidate remaining cy_card structures */
    for (i = 0 ; i < NR_CARDS ; i++) {
        if (cy_card[i].base_addr == 0) {
                cy_card[i].first_line = -1;
                cy_card[i].ctl_addr = 0;
                cy_card[i].irq = 0;
                cy_card[i].bus_index = 0;
                cy_card[i].first_line = 0;
                cy_card[i].num_chips = 0;
        }
    }
    /* invalidate remaining cy_port structures */
    for (i = cy_next_channel ; i < NR_PORTS ; i++) {
        cy_port[i].line = -1;
        cy_port[i].magic = -1;
    }
 
    /* initialize per-port data structures for each valid board found */
    for (board = 0 ; board < cy_nboard ; board++) {
            cinfo = &cy_card[board];
            if (cinfo->num_chips == -1){ /* Cyclades-Z */
                number_z_boards++;
                mailbox = cy_readl(&((struct RUNTIME_9060 *)
                             cy_card[board].ctl_addr)->mail_box_0);
                nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
                for (port = cinfo->first_line ;
                     port < cinfo->first_line + nports;
                     port++)
                {
                    info = &cy_port[port];
                    info->magic = CYCLADES_MAGIC;
                    info->type = PORT_STARTECH;
                    info->card = board;
                    info->line = port;
                    info->chip_rev = 0;
                    info->flags = STD_COM_FLAGS;
                    info->tty = 0;
                    if (mailbox == ZO_V1)
                        info->xmit_fifo_size = CYZ_FIFO_SIZE;
                    else
                        info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
                    info->cor1 = 0;
                    info->cor2 = 0;
                    info->cor3 = 0;
                    info->cor4 = 0;
                    info->cor5 = 0;
                    info->tbpr = 0;
                    info->tco = 0;
                    info->rbpr = 0;
                    info->rco = 0;
                    info->close_delay = 5*HZ/10;
                    info->closing_wait = CLOSING_WAIT_DELAY;
                    info->x_char = 0;
                    info->event = 0;
                    info->count = 0;
#ifdef CY_DEBUG_COUNT
//        printk("cyc:cy_init(1) setting Z count to 0\n");
#endif
                    info->blocked_open = 0;
                    info->default_threshold = 0;
                    info->default_timeout = 0;
                    info->tqueue.routine = do_softint;
                    info->tqueue.data = info;
                    info->callout_termios =
                                cy_callout_driver.init_termios;
                    info->normal_termios =
                                cy_serial_driver.init_termios;
                    info->open_wait = 0;
                    info->close_wait = 0;
                    info->shutdown_wait = 0;
                    /* info->session */
                    /* info->pgrp */
                    info->read_status_mask = 0;
                    /* info->timeout */
                    /* Bentson's vars */
                    info->jiffies[0] = 0;
                    info->jiffies[1] = 0;
                    info->jiffies[2] = 0;
                    info->rflush_count = 0;
                }
                continue;
            }else{ /* Cyclom-Y of some kind*/
                index = cinfo->bus_index;
                for (port = cinfo->first_line ;
                     port < cinfo->first_line + 4*cinfo->num_chips ;
                     port++)
                {
                    info = &cy_port[port];
                    info->magic = CYCLADES_MAGIC;
                    info->type = PORT_CIRRUS;
                    info->card = board;
                    info->line = port;
                    info->flags = STD_COM_FLAGS;
                    info->tty = 0;
                    info->xmit_fifo_size = CyMAX_CHAR_FIFO;
                    info->cor1 = CyPARITY_NONE|Cy_1_STOP|Cy_8_BITS;
                    info->cor2 = CyETC;
                    info->cor3 = 0x08; /* _very_ small rcv threshold */
                    info->cor4 = 0;
                    info->cor5 = 0;
                    info->close_delay = 5*HZ/10;
                    info->closing_wait = CLOSING_WAIT_DELAY;
                    chip_number = (port - cinfo->first_line) / 4;
                    if ((info->chip_rev = cy_readb(cinfo->base_addr +
                                 (cy_chip_offset[chip_number]<<index) +
                                 (CyGFRCR<<index))) >= CD1400_REV_J) {
                        /* It is a CD1400 rev. J or later */
                        info->tbpr = baud_bpr_60[13]; /* Tx BPR */
                        info->tco = baud_co_60[13]; /* Tx CO */
                        info->rbpr = baud_bpr_60[13]; /* Rx BPR */
                        info->rco = baud_co_60[13]; /* Rx CO */
                        info->rflow = 0;
                        info->rtsdtr_inv = 1;
                    } else {
                        info->tbpr = baud_bpr_25[13]; /* Tx BPR */
                        info->tco = baud_co_25[13]; /* Tx CO */
                        info->rbpr = baud_bpr_25[13]; /* Rx BPR */
                        info->rco = baud_co_25[13]; /* Rx CO */
                        info->rflow = 0;
                        info->rtsdtr_inv = 0;
                    }
                    info->x_char = 0;
                    info->event = 0;
                    info->count = 0;
#ifdef CY_DEBUG_COUNT
//        printk("cyc:cy_init(2) setting Y count to 0\n");
#endif
                    info->blocked_open = 0;
                    info->default_threshold = 0;
                    info->default_timeout = 0;
                    info->tqueue.routine = do_softint;
                    info->tqueue.data = info;
                    info->callout_termios =
                               cy_callout_driver.init_termios;
                    info->normal_termios =
                               cy_serial_driver.init_termios;
                    info->open_wait = 0;
                    info->close_wait = 0;
                    info->shutdown_wait = 0;
                    /* info->session */
                    /* info->pgrp */
                    info->read_status_mask =
                                  CyTIMEOUT| CySPECHAR| CyBREAK
                                  | CyPARITY| CyFRAME| CyOVERRUN;
                    /* info->timeout */
                }
            }
    }
 
    if ( number_z_boards && !cyz_timeron){
        cyz_timeron++;
        cyz_timerlist.expires = jiffies + 1;
        add_timer(&cyz_timerlist);
#ifdef CY_PCI_DEBUG
        printk("Cyclades-Z polling initialized\n");
#endif
    }
 
#if defined(CONFIG_PROC_FS) && !defined(MODULE)
    proc_register_dynamic(&proc_root, &cyclades_proc_entry);
#endif
 
    return 0;
 
} /* cy_init */
 
#ifdef MODULE
/* See linux/drivers/char/riscom.c for ideas on how to
   pass additional base addresses to the driver!!! */
int
init_module(void)
{
   return(cy_init());
} /* init_module */
 
void
cleanup_module(void)
{
    int i;
    unsigned long flags;
 
    if (cyz_timeron){
        cyz_timeron = 0;
        del_timer(&cyz_timerlist);
    }
 
    save_flags(flags); cli();
 
    free_page((unsigned long)tmp_buf);
    if (tty_unregister_driver(&cy_callout_driver))
            printk("Couldn't unregister Cyclades callout driver\n");
    if (tty_unregister_driver(&cy_serial_driver))
            printk("Couldn't unregister Cyclades serial driver\n");
 
    restore_flags(flags);
 
    for (i = 0; i < NR_CARDS; i++) {
        if (cy_card[i].base_addr != 0
            && cy_card[i].irq)
        {
            free_irq(cy_card[i].irq,NULL);
        }
    }
} /* cleanup_module */
#else
/* called by linux/init/main.c to parse command line options */
void
cy_setup(char *str, int *ints)
{
  int i, j;
 
    for (i = 0 ; i < NR_ISA_ADDRS ; i++) {
        if (cy_isa_addresses[i] == 0) break;
    }
    for (j = 1; j <= ints[0]; j++){
        if ( i < NR_ISA_ADDRS ){
            cy_isa_addresses[i++] = (unsigned char *)(ints[j]);
        }
    }
 
} /* cy_setup */
#endif
 
 
#ifdef CY_SHOW_STATUS
static void
show_status(int line_num)
{
  unsigned char *base_addr;
  int card,chip,channel,index;
  struct cyclades_port * info;
  unsigned long flags;
 
    info = &cy_port[line_num];
    card = info->card;
    index = cy_card[card].bus_index;
    channel = (info->line) - (cy_card[card].first_line);
    chip = channel>>2;
    channel &= 0x03;
    printk("  card %d, chip %d, channel %d\n", card, chip, channel);/**/
 
    printk(" cy_card\n");
    printk("  irq base_addr num_chips first_line = %d %lx %d %d\n",
           cy_card[card].irq, (long)cy_card[card].base_addr,
           cy_card[card].num_chips, cy_card[card].first_line);
 
    printk(" cy_port\n");
    printk("  card line flags = %d %d %x\n",
                 info->card, info->line, info->flags);
    printk("  *tty read_status_mask timeout xmit_fifo_size ",
    printk("= %lx %x %x %x\n",
                 (long)info->tty, info->read_status_mask,
                 info->timeout, info->xmit_fifo_size);
    printk("  cor1,cor2,cor3,cor4,cor5 = %x %x %x %x %x\n",
             info->cor1, info->cor2, info->cor3, info->cor4, info->cor5);
    printk("  tbpr,tco,rbpr,rco = %d %d %d %d\n",
             info->tbpr, info->tco, info->rbpr, info->rco);
    printk("  close_delay event count = %d %d %d\n",
             info->close_delay, info->event, info->count);
    printk("  x_char blocked_open = %x %x\n",
             info->x_char, info->blocked_open);
    printk("  session pgrp open_wait = %lx %lx %lx\n",
             info->session, info->pgrp, (long)info->open_wait);
 
 
    save_flags(flags); cli();
 
        base_addr = (unsigned char*)
                       (cy_card[card].base_addr
                       + (cy_chip_offset[chip]<<index));
 
/* Global Registers */
 
        printk(" CyGFRCR %x\n", cy_readb(base_addr + CyGFRCR<<index));
        printk(" CyCAR %x\n", cy_readb(base_addr + CyCAR<<index));
        printk(" CyGCR %x\n", cy_readb(base_addr + CyGCR<<index));
        printk(" CySVRR %x\n", cy_readb(base_addr + CySVRR<<index));
        printk(" CyRICR %x\n", cy_readb(base_addr + CyRICR<<index));
        printk(" CyTICR %x\n", cy_readb(base_addr + CyTICR<<index));
        printk(" CyMICR %x\n", cy_readb(base_addr + CyMICR<<index));
        printk(" CyRIR %x\n", cy_readb(base_addr + CyRIR<<index));
        printk(" CyTIR %x\n", cy_readb(base_addr + CyTIR<<index));
        printk(" CyMIR %x\n", cy_readb(base_addr + CyMIR<<index));
        printk(" CyPPR %x\n", cy_readb(base_addr + CyPPR<<index));
 
        cy_writeb(base_addr + CyCAR<<index, (u_char)channel);
 
/* Virtual Registers */
 
        printk(" CyRIVR %x\n", cy_readb(base_addr + CyRIVR<<index));
        printk(" CyTIVR %x\n", cy_readb(base_addr + CyTIVR<<index));
        printk(" CyMIVR %x\n", cy_readb(base_addr + CyMIVR<<index));
        printk(" CyMISR %x\n", cy_readb(base_addr + CyMISR<<index));
 
/* Channel Registers */
 
        printk(" CyCCR %x\n", cy_readb(base_addr + CyCCR<<index));
        printk(" CySRER %x\n", cy_readb(base_addr + CySRER<<index));
        printk(" CyCOR1 %x\n", cy_readb(base_addr + CyCOR1<<index));
        printk(" CyCOR2 %x\n", cy_readb(base_addr + CyCOR2<<index));
        printk(" CyCOR3 %x\n", cy_readb(base_addr + CyCOR3<<index));
        printk(" CyCOR4 %x\n", cy_readb(base_addr + CyCOR4<<index));
        printk(" CyCOR5 %x\n", cy_readb(base_addr + CyCOR5<<index));
        printk(" CyCCSR %x\n", cy_readb(base_addr + CyCCSR<<index));
        printk(" CyRDCR %x\n", cy_readb(base_addr + CyRDCR<<index));
        printk(" CySCHR1 %x\n", cy_readb(base_addr + CySCHR1<<index));
        printk(" CySCHR2 %x\n", cy_readb(base_addr + CySCHR2<<index));
        printk(" CySCHR3 %x\n", cy_readb(base_addr + CySCHR3<<index));
        printk(" CySCHR4 %x\n", cy_readb(base_addr + CySCHR4<<index));
        printk(" CySCRL %x\n", cy_readb(base_addr + CySCRL<<index));
        printk(" CySCRH %x\n", cy_readb(base_addr + CySCRH<<index));
        printk(" CyLNC %x\n", cy_readb(base_addr + CyLNC<<index));
        printk(" CyMCOR1 %x\n", cy_readb(base_addr + CyMCOR1<<index));
        printk(" CyMCOR2 %x\n", cy_readb(base_addr + CyMCOR2<<index));
        printk(" CyRTPR %x\n", cy_readb(base_addr + CyRTPR<<index));
        printk(" CyMSVR1 %x\n", cy_readb(base_addr + CyMSVR1<<index));
        printk(" CyMSVR2 %x\n", cy_readb(base_addr + CyMSVR2<<index));
        printk(" CyRBPR %x\n", cy_readb(base_addr + CyRBPR<<index));
        printk(" CyRCOR %x\n", cy_readb(base_addr + CyRCOR<<index));
        printk(" CyTBPR %x\n", cy_readb(base_addr + CyTBPR<<index));
        printk(" CyTCOR %x\n", cy_readb(base_addr + CyTCOR<<index));
 
    restore_flags(flags);
} /* show_status */
#endif
 

Line No.	Rev	Author	Line
1	1626	jcastillo	`#define BLOCKMOVE`
2			`#define Z_WAKE`
3			`static char rcsid[] =`
4			`"$Revision: 1.1 $$Date: 2005-12-20 10:16:40 $";`
5
6			`/*`
7			`* linux/drivers/char/cyclades.c`
8			`*`
9			`* This file contains the driver for the Cyclades Cyclom-Y multiport`
10			`* serial boards.`
11			`*`
12			`* Maintained by Ivan Passos (ivan@cyclades.com),`
13			`* Marcio Saito (marcio@cyclades.com) and`
14			`* Randolph Bentson (bentson@grieg.seaslug.org).`
15			`*`
16			`* For Technical support and installation problems, please send e-mail`
17			`* to support@cyclades.com.`
18			`*`
19			`* Much of the design and some of the code came from serial.c`
20			`* which was copyright (C) 1991, 1992 Linus Torvalds. It was`
21			`* extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,`
22			`* and then fixed as suggested by Michael K. Johnson 12/12/92.`
23			`*`
24			`* This version does not support shared irq's.`
25			`*`
26			`* This module exports the following rs232 io functions:`
27			`* int cy_init(void);`
28			`* int cy_open(struct tty_struct tty, struct file filp);`
29			`* and the following functions for modularization.`
30			`* int init_module(void);`
31			`* void cleanup_module(void);`
32			`*`
33			`* $Log: not supported by cvs2svn $`
34			`* Revision 1.1.1.1 2001/09/10 07:44:15 simons`
35			`* Initial import`
36			`*`
37			`* Revision 1.1.1.1 2001/07/02 17:58:25 simons`
38			`* Initial revision`
39			`*`
40			`* Revision 2.1.2.1 1999/04/08 16:17:18 ivan`
41			`* cy_wait_until_sent function revisited;`
42			`* Module usage counter scheme revisited;`
43			`* Added support to the upcoming Y PCI boards (i.e., support to additional`
44			`* PCI Device ID's).`
45			`*`
46			`* Revision 2.1.1.12 1999/01/19 13:08:18 ivan`
47			`* Fixed PLX PCI bridge registers mapping for Cyclom-Y boards, so`
48			`* that it works even with addresses out of memory page boundaries.`
49			`*`
50			`* Revision 2.1.1.11 1998/12/30 18:58:47 ivan`
51			`* Changed access to PLX PCI bridge registers from I/O to MMIO, in`
52			`* order to make PLX9050-based boards work with certain motherboards.`
53			`*`
54			`* Revision 2.1.1.10 1998/11/12 16:08:23 ivan`
55			`* cy_close function now resets (correctly) the tty->closing flag;`
56			`* JIFFIES_DIFF macro fixed.`
57			`*`
58			`* Revision 2.1.1.9 1998/09/02 14:47:01 ivan`
59			`* Fixed bug in cy_close function, which was not informing HW of`
60			`* which port should have the reception disabled before doing so;`
61			`* fixed Cyclom-8YoP hardware detection bug.`
62			`*`
63			`* Revision 2.1.1.8 1998/08/20 17:04:54 ivan`
64			`* Fixed bug in cy_close function, which causes malfunction`
65			`* of one of the first 4 ports when a higher port is closed`
66			`* (Cyclom-Y only).`
67			`*`
68			`* Revision 2.1.1.7 1998/08/10 17:01:45 ivan`
69			`* Fixed Cyclom-4Yo hardware detection bug.`
70			`*`
71			`* Revision 2.1.1.6 1998/08/04 12:19:36 ivan`
72			`* cyy_interrupt changed once more to avoid occurence of kernel`
73			`* oopses during PPP operation.`
74			`*`
75			`* Revision 2.1.1.5 1998/08/03 16:55:59 ivan`
76			`* /proc/cyclades implementation (only for monolythic driver)`
77			`* with great collaboration of Marc Lewis <marc@blarg.net>;`
78			`* cyy_interrupt was changed to avoid occurence of kernel oopses`
79			`* during PPP operation.`
80			`*`
81			`* Revision 2.1.1.4 1998/06/01 18:01:19 ivan`
82			`* data loss prevention revisited (cy_wait_until_sent created);`
83			`* MOD_COUNT bug (which caused the usage decrementing not to work`
84			`* properly) fixed.`
85			`*`
86			`* Revision 2.1.1.3b 1998/05/14 10:14:00 ivan`
87			`* temporary workaround for losing SIGHUPs in PPP connections`
88			`* (Cyclom-Y only).`
89			`*`
90			`* Revision 2.1.1.3a 1998/03/16 18:01:12 ivan`
91			`* cleaned up the data loss fix;`
92			`* fixed XON/XOFF handling once more (Cyclades-Z);`
93			`* general revision in the driver routines;`
94			`* introduction of a mechanism to prevent data loss with slow`
95			`* printers, by forcing a delay before closing the port.`
96			`*`
97			`* Revision 2.1.1.2a 1998/02/17 16:50:00 ivan`
98			`* fixed detection/handling of new CD1400 in Ye boards;`
99			`* fixed XON/XOFF handling (Cyclades-Z);`
100			`* fixed data loss caused by a premature port close;`
101			`* introduction of a flag that holds the CD1400 version ID per port`
102			`* (used by the CYGETCD1400VER new ioctl).`
103			`*`
104			`* Revision 2.1.1.1a 1997/12/03 17:31:19 ivan`
105			`* Code review for the module cleanup routine;`
106			`* fixed RTS and DTR status report for new CD1400's in get_modem_info;`
107			`* includes anonymous changes regarding signal_pending.`
108			`*`
109			`* Revision 2.1 1997/11/01 17:42:41 ivan`
110			`* Changes in the driver to support Alpha systems (except 8Zo V_1);`
111			`* BREAK fix for the Cyclades-Z boards;`
112			`* driver inactivity control by FW implemented;`
113			`* introduction of flag that allows driver to take advantage of`
114			`* a special CD1400 feature related to HW flow control;`
115			`* added support for the CD1400 rev. J (Cyclom-Y boards);`
116			`* introduction of ioctls to:`
117			`* - control the rtsdtr_inv flag (Cyclom-Y);`
118			`* - control the rflow flag (Cyclom-Y);`
119			`* - adjust the polling interval (Cyclades-Z);`
120			`*`
121			`* Revision 1.36.4.33 1997/06/27 19:00:00 ivan`
122			`* Fixes related to kernel version conditional`
123			`* compilation.`
124			`*`
125			`* Revision 1.36.4.32 1997/06/14 19:30:00 ivan`
126			`* Compatibility issues between kernels 2.0.x and`
127			`* 2.1.x (mainly related to clear_bit function).`
128			`*`
129			`* Revision 1.36.4.31 1997/06/03 15:30:00 ivan`
130			`* Changes to define the memory window according to the`
131			`* board type.`
132			`*`
133			`* Revision 1.36.4.30 1997/05/16 15:30:00 daniel`
134			`* Changes to suport new cycladesZ boards.`
135			`*`
136			`* Revision 1.36.4.29 1997/05/12 11:30:00 daniel`
137			`* Merge of Bentson's and Daniel's version 1.36.4.28.`
138			`* Corrects bug in cy_detect_pci: check if there are more`
139			`* ports than the number of static structs allocated.`
140			`* Warning message during initialization if this driver is`
141			`* used with the new generation of cycladesZ boards. Those`
142			`* will be supported only in next release of the driver.`
143			`* Corrects bug in cy_detect_pci and cy_detect_isa that`
144			`* returned wrong number of VALID boards, when a cyclomY`
145			`* was found with no serial modules connected.`
146			`* Changes to use current (2.1.x) kernel subroutine names`
147			`* and created macros for compilation with 2.0.x kernel,`
148			`* instead of the other way around.`
149			`*`
150			`* Revision 1.36.4.28 1997/05/?? ??:00:00 bentson`
151			`* Change queue_task_irq_off to queue_task_irq.`
152			`* The inline function queue_task_irq_off (tqueue.h)`
153			`* was removed from latest releases of 2.1.x kernel.`
154			`* Use of macro __initfunc to mark the initialization`
155			`* routines, so memory can be reused.`
156			`* Also incorporate implementation of critical region`
157			`* in function cleanup_module() created by anonymous`
158			`* linuxer.`
159			`*`
160			`* Revision 1.36.4.28 1997/04/25 16:00:00 daniel`
161			`* Change to support new firmware that solves DCD problem:`
162			`* application could fail to receive SIGHUP signal when DCD`
163			`* varying too fast.`
164			`*`
165			`* Revision 1.36.4.27 1997/03/26 10:30:00 daniel`
166			`* Changed for suport linux versions 2.1.X.`
167			`* Backward compatible with linux versions 2.0.X.`
168			`* Corrected illegal use of filler field in`
169			`* CH_CTRL struct.`
170			`* Deleted some debug messages.`
171			`*`
172			`* Revision 1.36.4.26 1997/02/27 12:00:00 daniel`
173			`* Included check for NULL tty pointer in cyz_poll.`
174			`*`
175			`* Revision 1.36.4.25 1997/02/26 16:28:30 bentson`
176			`* Bill Foster at Blarg! Online services noticed that`
177			`* some of the switch elements of -Z modem control`
178			`* lacked a closing "break;"`
179			`*`
180			`* Revision 1.36.4.24 1997/02/24 11:00:00 daniel`
181			`* Changed low water threshold for buffer xmit_buf`
182			`*`
183			`* Revision 1.36.4.23 1996/12/02 21:50:16 bentson`
184			`* Marcio provided fix to modem status fetch for -Z`
185			`*`
186			`* Revision 1.36.4.22 1996/10/28 22:41:17 bentson`
187			`* improve mapping of -Z control page (thanks to Steve`
188			`* Price <stevep@fa.tdktca.com> for help on this)`
189			`*`
190			`* Revision 1.36.4.21 1996/09/10 17:00:10 bentson`
191			`* shift from CPU-bound to memcopy in cyz_polling operation`
192			`*`
193			`* Revision 1.36.4.20 1996/09/09 18:30:32 Bentson`
194			`* Added support to set and report higher speeds.`
195			`*`
196			`* Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito`
197			`* Some fixes in the HW flow control for the BETA release.`
198			`* Don't try to register the IRQ.`
199			`*`
200			`* Revision 1.36.4.19 1996/08/08 16:23:18 Bentson`
201			`* make sure "cyc" appears in all kernel messages; all soft interrupts`
202			`* handled by same routine; recognize out-of-band reception; comment`
203			`* out some diagnostic messages; leave RTS/CTS flow control to hardware;`
204			`* fix race condition in -Z buffer management; only -Y needs to explictly`
205			`* flush chars; tidy up some startup messages;`
206			`*`
207			`* Revision 1.36.4.18 1996/07/25 18:57:31 bentson`
208			`* shift MOD_INC_USE_COUNT location to match`
209			`* serial.c; purge some diagnostic messages;`
210			`*`
211			`* Revision 1.36.4.17 1996/07/25 18:01:08 bentson`
212			`* enable modem status messages and fetch & process them; note`
213			`* time of last activity type for each port; set_line_char now`
214			`* supports more than line 0 and treats 0 baud correctly;`
215			`* get_modem_info senses rs_status;`
216			`*`
217			`* Revision 1.36.4.16 1996/07/20 08:43:15 bentson`
218			`* barely works--now's time to turn on`
219			`* more features 'til it breaks`
220			`*`
221			`* Revision 1.36.4.15 1996/07/19 22:30:06 bentson`
222			`* check more -Z board status; shorten boot message`
223			`*`
224			`* Revision 1.36.4.14 1996/07/19 22:20:37 bentson`
225			`* fix reference to ch_ctrl in startup; verify return`
226			`* values from cyz_issue_cmd and cyz_update_channel;`
227			`* more stuff to get modem control correct;`
228			`*`
229			`* Revision 1.36.4.13 1996/07/11 19:53:33 bentson`
230			`* more -Z stuff folded in; re-order changes to put -Z stuff`
231			`* after -Y stuff (to make changes clearer)`
232			`*`
233			`* Revision 1.36.4.12 1996/07/11 15:40:55 bentson`
234			`* Add code to poll Cyclades-Z. Add code to get & set RS-232 control.`
235			`* Add code to send break. Clear firmware ID word at startup (so`
236			`* that other code won't talk to inactive board).`
237			`*`
238			`* Revision 1.36.4.11 1996/07/09 05:28:29 bentson`
239			`* add code for -Z in set_line_char`
240			`*`
241			`* Revision 1.36.4.10 1996/07/08 19:28:37 bentson`
242			`* fold more -Z stuff (or in some cases, error messages)`
243			`* into driver; add text to "don't know what to do" messages.`
244			`*`
245			`* Revision 1.36.4.9 1996/07/08 18:38:38 bentson`
246			`* moved compile-time flags near top of file; cosmetic changes`
247			`* to narrow text (to allow 2-up printing); changed many declarations`
248			`* to "static" to limit external symbols; shuffled code order to`
249			`* coalesce -Y and -Z specific code, also to put internal functions`
250			`* in order of tty_driver structure; added code to recognize -Z`
251			`* ports (and for moment, do nothing or report error); add cy_startup`
252			`* to parse boot command line for extra base addresses for ISA probes;`
253			`*`
254			`* Revision 1.36.4.8 1996/06/25 17:40:19 bentson`
255			`* reorder some code, fix types of some vars (int vs. long),`
256			`* add cy_setup to support user declared ISA addresses`
257			`*`
258			`* Revision 1.36.4.7 1996/06/21 23:06:18 bentson`
259			`* dump ioctl based firmware load (it's now a user level`
260			`* program); ensure uninitialzed ports cannot be used`
261			`*`
262			`* Revision 1.36.4.6 1996/06/20 23:17:19 bentson`
263			`* rename vars and restructure some code`
264			`*`
265			`* Revision 1.36.4.5 1996/06/14 15:09:44 bentson`
266			`* get right status back after boot load`
267			`*`
268			`* Revision 1.36.4.4 1996/06/13 19:51:44 bentson`
269			`* successfully loads firmware`
270			`*`
271			`* Revision 1.36.4.3 1996/06/13 06:08:33 bentson`
272			`* add more of the code for the boot/load ioctls`
273			`*`
274			`* Revision 1.36.4.2 1996/06/11 21:00:51 bentson`
275			`* start to add Z functionality--starting with ioctl`
276			`* for loading firmware`
277			`*`
278			`* Revision 1.36.4.1 1996/06/10 18:03:02 bentson`
279			`* added code to recognize Z/PCI card at initialization; report`
280			`* presence, but card is not initialized (because firmware needs`
281			`* to be loaded)`
282			`*`
283			`* Revision 1.36.3.8 1996/06/07 16:29:00 bentson`
284			`* starting minor number at zero; added missing verify_area`
285			`* as noted by Heiko Eissfeldt <heiko@colossus.escape.de>`
286			`*`
287			`* Revision 1.36.3.7 1996/04/19 21:06:18 bentson`
288			`* remove unneeded boot message & fix CLOCAL hardware flow`
289			`* control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);`
290			`* remove unused diagnostic statements; minor 0 is first;`
291			`*`
292			`* Revision 1.36.3.6 1996/03/13 13:21:17 marcio`
293			`* The kernel function vremap (available only in later 1.3.xx kernels)`
294			`* allows the access to memory addresses above the RAM. This revision`
295			`* of the driver supports PCI boards below 1Mb (device id 0x100) and`
296			`* above 1Mb (device id 0x101).`
297			`*`
298			`* Revision 1.36.3.5 1996/03/07 15:20:17 bentson`
299			`* Some global changes to interrupt handling spilled into`
300			`* this driver--mostly unused arguments in system function`
301			`* calls. Also added change by Marcio Saito which should`
302			`* reduce lost interrupts at startup by fast processors.`
303			`*`
304			`* Revision 1.36.3.4 1995/11/13 20:45:10 bentson`
305			`* Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed`
306			`* in 1.3.41 kernel to remove a possible race condition, extend`
307			`* some error messages, and let the driver run as a loadable module`
308			`* Change by Alan Wendt <alan@ez0.ezlink.com> to remove a`
309			`* possible race condition.`
310			`* Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.`
311			`*`
312			`* Revision 1.36.3.3 1995/11/13 19:44:48 bentson`
313			`* Changes by Linus Torvalds in 1.3.33 kernel distribution`
314			`* required due to reordering of driver initialization.`
315			`* Drivers are now initialized after memory management.`
316			`*`
317			`* Revision 1.36.3.2 1995/09/08 22:07:14 bentson`
318			`* remove printk from ISR; fix typo`
319			`*`
320			`* Revision 1.36.3.1 1995/09/01 12:00:42 marcio`
321			`* Minor fixes in the PCI board support. PCI function calls in`
322			`* conditional compilation (CONFIG_PCI). Thanks to Jim Duncan`
323			`* <duncan@okay.com>. "bad serial count" message removed.`
324			`*`
325			`* Revision 1.36.3 1995/08/22 09:19:42 marcio`
326			`* Cyclom-Y/PCI support added. Changes in the cy_init routine and`
327			`* board initialization. Changes in the boot messages. The driver`
328			`* supports up to 4 boards and 64 ports by default.`
329			`*`
330			`* Revision 1.36.1.4 1995/03/29 06:14:14 bentson`
331			`* disambiguate between Cyclom-16Y and Cyclom-32Ye;`
332			`*`
333			`* Revision 1.36.1.3 1995/03/23 22:15:35 bentson`
334			`* add missing break in modem control block in ioctl switch statement`
335			`* (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);`
336			`*`
337			`* Revision 1.36.1.2 1995/03/22 19:16:22 bentson`
338			`* make sure CTS flow control is set as soon as possible (thanks`
339			`* to note from David Lambert <lambert@chesapeake.rps.slb.com>);`
340			`*`
341			`* Revision 1.36.1.1 1995/03/13 15:44:43 bentson`
342			`* initialize defaults for receive threshold and stale data timeout;`
343			`* cosmetic changes;`
344			`*`
345			`* Revision 1.36 1995/03/10 23:33:53 bentson`
346			`* added support of chips 4-7 in 32 port Cyclom-Ye;`
347			`* fix cy_interrupt pointer dereference problem`
348			`* (Joe Portman <baron@aa.net>);`
349			`* give better error response if open is attempted on non-existent port`
350			`* (Zachariah Vaum <jchryslr@netcom.com>);`
351			`* correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);`
352			`* conditional compilation for -16Y on systems with fast, noisy bus;`
353			`* comment out diagnostic print function;`
354			`* cleaned up table of base addresses;`
355			`* set receiver time-out period register to correct value,`
356			`* set receive threshold to better default values,`
357			`* set chip timer to more accurate 200 Hz ticking,`
358			`* add code to monitor and modify receive parameters`
359			`* (Rik Faith <faith@cs.unc.edu> Nick Simicich`
360			`* <njs@scifi.emi.net>);`
361			`*`
362			`* Revision 1.35 1994/12/16 13:54:18 steffen`
363			`* additional patch by Marcio Saito for board detection`
364			`* Accidently left out in 1.34`
365			`*`
366			`* Revision 1.34 1994/12/10 12:37:12 steffen`
367			`* This is the corrected version as suggested by Marcio Saito`
368			`*`
369			`* Revision 1.33 1994/12/01 22:41:18 bentson`
370			`* add hooks to support more high speeds directly; add tytso`
371			`* patch regarding CLOCAL wakeups`
372			`*`
373			`* Revision 1.32 1994/11/23 19:50:04 bentson`
374			`* allow direct kernel control of higher signalling rates;`
375			`* look for cards at additional locations`
376			`*`
377			`* Revision 1.31 1994/11/16 04:33:28 bentson`
378			`* ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--`
379			`* a problem in chars_in_buffer has been resolved by some`
380			`* small changes; this should yield smoother output`
381			`*`
382			`* Revision 1.30 1994/11/16 04:28:05 bentson`
383			`* Fix from Corey Minyard, Internet: minyard@metronet.com,`
384			`* UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to`
385			`* cy_hangup that appears to clear up much (all?) of the`
386			`* DTR glitches; also he's added/cleaned-up diagnostic messages`
387			`*`
388			`* Revision 1.29 1994/11/16 04:16:07 bentson`
389			`* add change proposed by Ralph Sims, ralphs@halcyon.com, to`
390			`* operate higher speeds in same way as other serial ports;`
391			`* add more serial ports (for up to two 16-port muxes).`
392			`*`
393			`* Revision 1.28 1994/11/04 00:13:16 root`
394			`* turn off diagnostic messages`
395			`*`
396			`* Revision 1.27 1994/11/03 23:46:37 root`
397			`* bunch of changes to bring driver into greater conformance`
398			`* with the serial.c driver (looking for missed fixes)`
399			`*`
400			`* Revision 1.26 1994/11/03 22:40:36 root`
401			`* automatic interrupt probing fixed.`
402			`*`
403			`* Revision 1.25 1994/11/03 20:17:02 root`
404			`* start to implement auto-irq`
405			`*`
406			`* Revision 1.24 1994/11/03 18:01:55 root`
407			`* still working on modem signals--trying not to drop DTR`
408			`* during the getty/login processes`
409			`*`
410			`* Revision 1.23 1994/11/03 17:51:36 root`
411			`* extend baud rate support; set receive threshold as function`
412			`* of baud rate; fix some problems with RTS/CTS;`
413			`*`
414			`* Revision 1.22 1994/11/02 18:05:35 root`
415			`* changed arguments to udelay to type long to get`
416			`* delays to be of correct duration`
417			`*`
418			`* Revision 1.21 1994/11/02 17:37:30 root`
419			`* employ udelay (after calibrating loops_per_second earlier`
420			`* in init/main.c) instead of using home-grown delay routines`
421			`*`
422			`* Revision 1.20 1994/11/02 03:11:38 root`
423			`* cy_chars_in_buffer forces a return value of 0 to let`
424			`* login work (don't know why it does); some functions`
425			`* that were returning EFAULT, now executes the code;`
426			`* more work on deciding when to disable xmit interrupts;`
427			`*`
428			`* Revision 1.19 1994/11/01 20:10:14 root`
429			`* define routine to start transmission interrupts (by enabling`
430			`* transmit interrupts); directly enable/disable modem interrupts;`
431			`*`
432			`* Revision 1.18 1994/11/01 18:40:45 bentson`
433			`* Don't always enable transmit interrupts in startup; interrupt on`
434			`* TxMpty instead of TxRdy to help characters get out before shutdown;`
435			`* restructure xmit interrupt to check for chars first and quit if`
436			`* none are ready to go; modem status (MXVRx) is upright, _not_ inverted`
437			`* (to my view);`
438			`*`
439			`* Revision 1.17 1994/10/30 04:39:45 bentson`
440			`* rename serial_driver and callout_driver to cy_serial_driver and`
441			`* cy_callout_driver to avoid linkage interference; initialize`
442			`* info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port`
443			`* from cyclades_port structure; add paranoia check to cy_close;`
444			`*`
445			`* Revision 1.16 1994/10/30 01:14:33 bentson`
446			`* change major numbers; add some _early_ return statements;`
447			`*`
448			`* Revision 1.15 1994/10/29 06:43:15 bentson`
449			`* final tidying up for clean compile; enable some error reporting`
450			`*`
451			`* Revision 1.14 1994/10/28 20:30:22 Bentson`
452			`* lots of changes to drag the driver towards the new tty_io`
453			`* structures and operation. not expected to work, but may`
454			`* compile cleanly.`
455			`*`
456			`* Revision 1.13 1994/07/21 23:08:57 Bentson`
457			`* add some diagnostic cruft; support 24 lines (for testing`
458			`* both -8Y and -16Y cards; be more thorough in servicing all`
459			`* chips during interrupt; add "volatile" a few places to`
460			`* circumvent compiler optimizations; fix base & offset`
461			`* computations in block_til_ready (was causing chip 0 to`
462			`* stop operation)`
463			`*`
464			`* Revision 1.12 1994/07/19 16:42:11 Bentson`
465			`* add some hackery for kernel version 1.1.8; expand`
466			`* error messages; refine timing for delay loops and`
467			`* declare loop params volatile`
468			`*`
469			`* Revision 1.11 1994/06/11 21:53:10 bentson`
470			`* get use of save_car right in transmit interrupt service`
471			`*`
472			`* Revision 1.10.1.1 1994/06/11 21:31:18 bentson`
473			`* add some diagnostic printing; try to fix save_car stuff`
474			`*`
475			`* Revision 1.10 1994/06/11 20:36:08 bentson`
476			`* clean up compiler warnings`
477			`*`
478			`* Revision 1.9 1994/06/11 19:42:46 bentson`
479			`* added a bunch of code to support modem signalling`
480			`*`
481			`* Revision 1.8 1994/06/11 17:57:07 bentson`
482			`* recognize break & parity error`
483			`*`
484			`* Revision 1.7 1994/06/05 05:51:34 bentson`
485			`* Reorder baud table to be monotonic; add cli to CP; discard`
486			`* incoming characters and status if the line isn't open; start to`
487			`* fold code into cy_throttle; start to port get_serial_info,`
488			`* set_serial_info, get_modem_info, set_modem_info, and send_break`
489			`* from serial.c; expand cy_ioctl; relocate and expand config_setup;`
490			`* get flow control characters from tty struct; invalidate ports w/o`
491			`* hardware;`
492			`*`
493			`* Revision 1.6 1994/05/31 18:42:21 bentson`
494			`* add a loop-breaker in the interrupt service routine;`
495			`* note when port is initialized so that it can be shut`
496			`* down under the right conditions; receive works without`
497			`* any obvious errors`
498			`*`
499			`* Revision 1.5 1994/05/30 00:55:02 bentson`
500			`* transmit works without obvious errors`

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Line No.	Rev	Author	Line
1	1626	jcastillo	`#define BLOCKMOVE`
2			`#define Z_WAKE`
3			`static char rcsid[] =`
4			`"$Revision: 1.1 $$Date: 2005-12-20 10:16:40 $";`
5
6			`/*`
7			`* linux/drivers/char/cyclades.c`
8			`*`
9			`* This file contains the driver for the Cyclades Cyclom-Y multiport`
10			`* serial boards.`
11			`*`
12			`* Maintained by Ivan Passos (ivan@cyclades.com),`
13			`* Marcio Saito (marcio@cyclades.com) and`
14			`* Randolph Bentson (bentson@grieg.seaslug.org).`
15			`*`
16			`* For Technical support and installation problems, please send e-mail`
17			`* to support@cyclades.com.`
18			`*`
19			`* Much of the design and some of the code came from serial.c`
20			`* which was copyright (C) 1991, 1992 Linus Torvalds. It was`
21			`* extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,`
22			`* and then fixed as suggested by Michael K. Johnson 12/12/92.`
23			`*`
24			`* This version does not support shared irq's.`
25			`*`
26			`* This module exports the following rs232 io functions:`
27			`* int cy_init(void);`
28			`* int cy_open(struct tty_struct tty, struct file filp);`
29			`* and the following functions for modularization.`
30			`* int init_module(void);`
31			`* void cleanup_module(void);`
32			`*`
33			`* $Log: not supported by cvs2svn $`
34			`* Revision 1.1.1.1 2001/09/10 07:44:15 simons`
35			`* Initial import`
36			`*`
37			`* Revision 1.1.1.1 2001/07/02 17:58:25 simons`
38			`* Initial revision`
39			`*`
40			`* Revision 2.1.2.1 1999/04/08 16:17:18 ivan`