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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [char/] [stallion.c] - Rev 1765
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/*****************************************************************************/ /* * stallion.c -- stallion multiport serial driver. * * Copyright (C) 1996-1998 Stallion Technologies (support@stallion.oz.au). * Copyright (C) 1994-1996 Greg Ungerer (gerg@stallion.oz.au). * * This code is loosely based on the Linux serial driver, written by * Linus Torvalds, Theodore T'so and others. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /*****************************************************************************/ #include <linux/module.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/wait.h> #include <linux/interrupt.h> #include <linux/termios.h> #include <linux/fcntl.h> #include <linux/tty_driver.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial.h> #include <linux/cd1400.h> #include <linux/sc26198.h> #include <linux/comstats.h> #include <linux/stallion.h> #include <linux/string.h> #include <linux/malloc.h> #include <linux/ioport.h> #include <linux/config.h> #include <asm/system.h> #include <asm/io.h> #include <asm/segment.h> #ifdef CONFIG_PCI #include <linux/pci.h> #include <linux/bios32.h> #endif /*****************************************************************************/ /* * Define different board types. Use the standard Stallion "assigned" * board numbers. Boards supported in this driver are abbreviated as * EIO = EasyIO and ECH = EasyConnection 8/32. */ #define BRD_EASYIO 20 #define BRD_ECH 21 #define BRD_ECHMC 22 #define BRD_ECHPCI 26 #define BRD_ECH64PCI 27 #define BRD_EASYIOPCI 28 /* * Define a configuration structure to hold the board configuration. * Need to set this up in the code (for now) with the boards that are * to be configured into the system. This is what needs to be modified * when adding/removing/modifying boards. Each line entry in the * stl_brdconf[] array is a board. Each line contains io/irq/memory * ranges for that board (as well as what type of board it is). * Some examples: * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 } * This line would configure an EasyIO board (4 or 8, no difference), * at io address 2a0 and irq 10. * Another example: * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, * This line will configure an EasyConnection 8/32 board at primary io * address 2a8, secondary io address 280 and irq 12. * Enter as many lines into this array as you want (only the first 4 * will actually be used!). Any combination of EasyIO and EasyConnection * boards can be specified. EasyConnection 8/32 boards can share their * secondary io addresses between each other. * * NOTE: there is no need to put any entries in this table for PCI * boards. They will be found automatically by the driver - provided * PCI BIOS32 support is compiled into the kernel. */ typedef struct { int brdtype; int ioaddr1; int ioaddr2; unsigned long memaddr; int irq; int irqtype; } stlconf_t; static stlconf_t stl_brdconf[] = { { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, }; static int stl_nrbrds = sizeof(stl_brdconf) / sizeof(stlconf_t); /*****************************************************************************/ /* * Define some important driver characteristics. Device major numbers * allocated as per Linux Device Registry. */ #ifndef STL_SIOMEMMAJOR #define STL_SIOMEMMAJOR 28 #endif #ifndef STL_SERIALMAJOR #define STL_SERIALMAJOR 24 #endif #ifndef STL_CALLOUTMAJOR #define STL_CALLOUTMAJOR 25 #endif #define STL_DRVTYPSERIAL 1 #define STL_DRVTYPCALLOUT 2 /* * Set the TX buffer size. Bigger is better, but we don't want * to chew too much memory with buffers! */ #define STL_TXBUFLOW 512 #define STL_TXBUFSIZE 4096 /*****************************************************************************/ /* * Define our local driver identity first. Set up stuff to deal with * all the local structures required by a serial tty driver. */ static char *stl_drvtitle = "Stallion Multiport Serial Driver"; static char *stl_drvversion = "5.4.4"; static char *stl_serialname = "ttyE"; static char *stl_calloutname = "cue"; static struct tty_driver stl_serial; static struct tty_driver stl_callout; static struct tty_struct *stl_ttys[STL_MAXDEVS]; static struct termios *stl_termios[STL_MAXDEVS]; static struct termios *stl_termioslocked[STL_MAXDEVS]; static int stl_refcount = 0; /* * We will need to allocate a temporary write buffer for chars that * come direct from user space. The problem is that a copy from user * space might cause a page fault (typically on a system that is * swapping!). All ports will share one buffer - since if the system * is already swapping a shared buffer won't make things any worse. */ static char *stl_tmpwritebuf; static struct semaphore stl_tmpwritesem = MUTEX; /* * Define a local default termios struct. All ports will be created * with this termios initially. Basically all it defines is a raw port * at 9600, 8 data bits, 1 stop bit. */ static struct termios stl_deftermios = { 0, 0, (B9600 | CS8 | CREAD | HUPCL | CLOCAL), 0, 0, INIT_C_CC }; /* * Define global stats structures. Not used often, and can be * re-used for each stats call. */ static comstats_t stl_comstats; static combrd_t stl_brdstats; static stlbrd_t stl_dummybrd; static stlport_t stl_dummyport; /* * Define global place to put buffer overflow characters. */ static char stl_unwanted[SC26198_RXFIFOSIZE]; /* * Keep track of what interrupts we have requested for us. * We don't need to request an interrupt twice if it is being * shared with another Stallion board. */ static int stl_gotintrs[STL_MAXBRDS]; static int stl_numintrs = 0; /*****************************************************************************/ static stlbrd_t *stl_brds[STL_MAXBRDS]; /* * Per board state flags. Used with the state field of the board struct. * Not really much here! */ #define BRD_FOUND 0x1 /* * Define the port structure istate flags. These set of flags are * modified at interrupt time - so setting and reseting them needs * to be atomic. Use the bit clear/setting routines for this. */ #define ASYI_TXBUSY 1 #define ASYI_TXLOW 2 #define ASYI_DCDCHANGE 3 #define ASYI_TXFLOWED 4 /* * Define an array of board names as printable strings. Handy for * referencing boards when printing trace and stuff. */ static char *stl_brdnames[] = { (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, "EasyIO", "EC8/32-AT", "EC8/32-MC", (char *) NULL, (char *) NULL, (char *) NULL, "EC8/32-PCI", "EC8/64-PCI", "EasyIO-PCI", }; /*****************************************************************************/ /* * Hardware ID bits for the EasyIO and ECH boards. These defines apply * to the directly accessible io ports of these boards (not the uarts - * they are in cd1400.h and sc26198.h). */ #define EIO_8PORTRS 0x04 #define EIO_4PORTRS 0x05 #define EIO_8PORTDI 0x00 #define EIO_8PORTM 0x06 #define EIO_MK3 0x03 #define EIO_IDBITMASK 0x07 #define EIO_BRDMASK 0xf0 #define ID_BRD4 0x10 #define ID_BRD8 0x20 #define ID_BRD16 0x30 #define EIO_INTRPEND 0x08 #define EIO_INTEDGE 0x00 #define EIO_INTLEVEL 0x08 #define EIO_0WS 0x10 #define ECH_ID 0xa0 #define ECH_IDBITMASK 0xe0 #define ECH_BRDENABLE 0x08 #define ECH_BRDDISABLE 0x00 #define ECH_INTENABLE 0x01 #define ECH_INTDISABLE 0x00 #define ECH_INTLEVEL 0x02 #define ECH_INTEDGE 0x00 #define ECH_INTRPEND 0x01 #define ECH_BRDRESET 0x01 #define ECHMC_INTENABLE 0x01 #define ECHMC_BRDRESET 0x02 #define ECH_PNLSTATUS 2 #define ECH_PNL16PORT 0x20 #define ECH_PNLIDMASK 0x07 #define ECH_PNLXPID 0x40 #define ECH_PNLINTRPEND 0x80 #define ECH_ADDR2MASK 0x1e0 /* * Define the vector mapping bits for the programmable interrupt board * hardware. These bits encode the interrupt for the board to use - it * is software selectable (except the EIO-8M). */ static unsigned char stl_vecmap[] = { 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 }; /* * Set up enable and disable macros for the ECH boards. They require * the secondary io address space to be activated and deactivated. * This way all ECH boards can share their secondary io region. * If this is an ECH-PCI board then also need to set the page pointer * to point to the correct page. */ #define BRDENABLE(brdnr,pagenr) \ if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ stl_brds[(brdnr)]->ioctrl); \ else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ outb((pagenr), stl_brds[(brdnr)]->ioctrl); #define BRDDISABLE(brdnr) \ if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ stl_brds[(brdnr)]->ioctrl); #define STL_CD1400MAXBAUD 230400 #define STL_SC26198MAXBAUD 460800 #define STL_BAUDBASE 115200 #define STL_CLOSEDELAY (5 * HZ / 10) /*****************************************************************************/ #ifdef CONFIG_PCI /* * Define the Stallion PCI vendor and device IDs. */ #ifndef PCI_VENDOR_ID_STALLION #define PCI_VENDOR_ID_STALLION 0x124d #endif #ifndef PCI_DEVICE_ID_ECHPCI832 #define PCI_DEVICE_ID_ECHPCI832 0x0000 #endif #ifndef PCI_DEVICE_ID_ECHPCI864 #define PCI_DEVICE_ID_ECHPCI864 0x0002 #endif #ifndef PCI_DEVICE_ID_EIOPCI #define PCI_DEVICE_ID_EIOPCI 0x0003 #endif /* * Define structure to hold all Stallion PCI boards. */ typedef struct stlpcibrd { unsigned short vendid; unsigned short devid; int brdtype; } stlpcibrd_t; static stlpcibrd_t stl_pcibrds[] = { { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI }, { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI }, { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI }, { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI }, }; static int stl_nrpcibrds = sizeof(stl_pcibrds) / sizeof(stlpcibrd_t); #endif /*****************************************************************************/ /* * Define macros to extract a brd/port number from a minor number. */ #define MKDEV2BRD(min) (((min) & 0xc0) >> 6) #define MKDEV2PORT(min) ((min) & 0x3f) /* * Define a baud rate table that converts termios baud rate selector * into the actual baud rate value. All baud rate calculations are * based on the actual baud rate required. */ static unsigned int stl_baudrates[] = { 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 }; /* * Define some handy local macros... */ #ifndef MIN #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) #endif /*****************************************************************************/ /* * Declare all those functions in this driver! */ #ifdef MODULE int init_module(void); void cleanup_module(void); #endif int stl_init(void); static int stl_open(struct tty_struct *tty, struct file *filp); static void stl_close(struct tty_struct *tty, struct file *filp); static int stl_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count); static void stl_putchar(struct tty_struct *tty, unsigned char ch); static void stl_flushchars(struct tty_struct *tty); static int stl_writeroom(struct tty_struct *tty); static int stl_charsinbuffer(struct tty_struct *tty); static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); static void stl_settermios(struct tty_struct *tty, struct termios *old); static void stl_throttle(struct tty_struct *tty); static void stl_unthrottle(struct tty_struct *tty); static void stl_stop(struct tty_struct *tty); static void stl_start(struct tty_struct *tty); static void stl_flushbuffer(struct tty_struct *tty); static void stl_waituntilsent(struct tty_struct *tty, int timeout); static void stl_hangup(struct tty_struct *tty); static int stl_memopen(struct inode *ip, struct file *fp); static void stl_memclose(struct inode *ip, struct file *fp); static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); static int stl_brdinit(stlbrd_t *brdp); static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp); static int stl_mapirq(int irq, char *name); static void stl_getserial(stlport_t *portp, struct serial_struct *sp); static int stl_setserial(stlport_t *portp, struct serial_struct *sp); static int stl_getbrdstats(combrd_t *bp); static int stl_getportstats(stlport_t *portp, comstats_t *cp); static int stl_clrportstats(stlport_t *portp, comstats_t *cp); static int stl_getportstruct(unsigned long arg); static int stl_getbrdstruct(unsigned long arg); static int stl_waitcarrier(stlport_t *portp, struct file *filp); static void stl_delay(int len); static void stl_intr(int irq, void *dev_id, struct pt_regs *regs); static void stl_eiointr(stlbrd_t *brdp); static void stl_echatintr(stlbrd_t *brdp); static void stl_echmcaintr(stlbrd_t *brdp); static void stl_echpciintr(stlbrd_t *brdp); static void stl_echpci64intr(stlbrd_t *brdp); static void stl_offintr(void *private); static void *stl_memalloc(int len); static stlport_t *stl_getport(int brdnr, int panelnr, int portnr); static inline int stl_initbrds(void); static inline int stl_initeio(stlbrd_t *brdp); static inline int stl_initech(stlbrd_t *brdp); #ifdef CONFIG_PCI static inline int stl_findpcibrds(void); static inline int stl_initpcibrd(int brdtype, unsigned char busnr, unsigned char devnr); #endif /* * CD1400 uart specific handling functions. */ static void stl_cd1400setreg(stlport_t *portp, int regnr, int value); static int stl_cd1400getreg(stlport_t *portp, int regnr); static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value); static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp); static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp); static int stl_cd1400getsignals(stlport_t *portp); static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts); static void stl_cd1400ccrwait(stlport_t *portp); static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx); static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx); static void stl_cd1400disableintrs(stlport_t *portp); static void stl_cd1400sendbreak(stlport_t *portp, long len); static void stl_cd1400flowctrl(stlport_t *portp, int state); static void stl_cd1400sendflow(stlport_t *portp, int state); static void stl_cd1400flush(stlport_t *portp); static int stl_cd1400datastate(stlport_t *portp); static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase); static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase); static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr); static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr); static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr); /* * SC26198 uart specific handling functions. */ static void stl_sc26198setreg(stlport_t *portp, int regnr, int value); static int stl_sc26198getreg(stlport_t *portp, int regnr); static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value); static int stl_sc26198getglobreg(stlport_t *portp, int regnr); static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp); static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp); static int stl_sc26198getsignals(stlport_t *portp); static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts); static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx); static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx); static void stl_sc26198disableintrs(stlport_t *portp); static void stl_sc26198sendbreak(stlport_t *portp, long len); static void stl_sc26198flowctrl(stlport_t *portp, int state); static void stl_sc26198sendflow(stlport_t *portp, int state); static void stl_sc26198flush(stlport_t *portp); static int stl_sc26198datastate(stlport_t *portp); static void stl_sc26198wait(stlport_t *portp); static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty); static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase); static void stl_sc26198txisr(stlport_t *port); static void stl_sc26198rxisr(stlport_t *port, unsigned int iack); static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch); static void stl_sc26198rxbadchars(stlport_t *portp); static void stl_sc26198otherisr(stlport_t *port, unsigned int iack); /*****************************************************************************/ /* * Generic UART support structure. */ typedef struct uart { int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp); void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); void (*setport)(stlport_t *portp, struct termios *tiosp); int (*getsignals)(stlport_t *portp); void (*setsignals)(stlport_t *portp, int dtr, int rts); void (*enablerxtx)(stlport_t *portp, int rx, int tx); void (*startrxtx)(stlport_t *portp, int rx, int tx); void (*disableintrs)(stlport_t *portp); void (*sendbreak)(stlport_t *portp, long len); void (*flowctrl)(stlport_t *portp, int state); void (*sendflow)(stlport_t *portp, int state); void (*flush)(stlport_t *portp); int (*datastate)(stlport_t *portp); void (*intr)(stlpanel_t *panelp, unsigned int iobase); } uart_t; /* * Define some macros to make calling these functions nice and clean. */ #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) #define stl_setport (* ((uart_t *) portp->uartp)->setport) #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) #define stl_flush (* ((uart_t *) portp->uartp)->flush) #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) /*****************************************************************************/ /* * CD1400 UART specific data initialization. */ static uart_t stl_cd1400uart = { stl_cd1400panelinit, stl_cd1400portinit, stl_cd1400setport, stl_cd1400getsignals, stl_cd1400setsignals, stl_cd1400enablerxtx, stl_cd1400startrxtx, stl_cd1400disableintrs, stl_cd1400sendbreak, stl_cd1400flowctrl, stl_cd1400sendflow, stl_cd1400flush, stl_cd1400datastate, stl_cd1400eiointr }; /* * Define the offsets within the register bank of a cd1400 based panel. * These io address offsets are common to the EasyIO board as well. */ #define EREG_ADDR 0 #define EREG_DATA 4 #define EREG_RXACK 5 #define EREG_TXACK 6 #define EREG_MDACK 7 #define EREG_BANKSIZE 8 #define CD1400_CLK 25000000 #define CD1400_CLK8M 20000000 /* * Define the cd1400 baud rate clocks. These are used when calculating * what clock and divisor to use for the required baud rate. Also * define the maximum baud rate allowed, and the default base baud. */ static int stl_cd1400clkdivs[] = { CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 }; /*****************************************************************************/ /* * SC26198 UART specific data initization. */ static uart_t stl_sc26198uart = { stl_sc26198panelinit, stl_sc26198portinit, stl_sc26198setport, stl_sc26198getsignals, stl_sc26198setsignals, stl_sc26198enablerxtx, stl_sc26198startrxtx, stl_sc26198disableintrs, stl_sc26198sendbreak, stl_sc26198flowctrl, stl_sc26198sendflow, stl_sc26198flush, stl_sc26198datastate, stl_sc26198intr }; /* * Define the offsets within the register bank of a sc26198 based panel. */ #define XP_DATA 0 #define XP_ADDR 1 #define XP_MODID 2 #define XP_STATUS 2 #define XP_IACK 3 #define XP_BANKSIZE 4 /* * Define the sc26198 baud rate table. Offsets within the table * represent the actual baud rate selector of sc26198 registers. */ static unsigned int sc26198_baudtable[] = { 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 921600 }; #define SC26198_NRBAUDS (sizeof(sc26198_baudtable) / sizeof(unsigned int)) /*****************************************************************************/ /* * Define the driver info for a user level control device. Used mainly * to get at port stats - only not using the port device itself. */ static struct file_operations stl_fsiomem = { NULL, NULL, NULL, NULL, NULL, stl_memioctl, NULL, stl_memopen, stl_memclose, NULL }; /*****************************************************************************/ #ifdef MODULE /* * Loadable module initialization stuff. */ int init_module() { unsigned long flags; #if DEBUG printk("init_module()\n"); #endif save_flags(flags); cli(); stl_init(); restore_flags(flags); return(0); } /*****************************************************************************/ void cleanup_module() { stlbrd_t *brdp; stlpanel_t *panelp; stlport_t *portp; unsigned long flags; int i, j, k; #if DEBUG printk("cleanup_module()\n"); #endif printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, stl_drvversion); save_flags(flags); cli(); /* * Free up all allocated resources used by the ports. This includes * memory and interrupts. As part of this process we will also do * a hangup on every open port - to try to flush out any processes * hanging onto ports. */ i = tty_unregister_driver(&stl_serial); j = tty_unregister_driver(&stl_callout); if (i || j) { printk("STALLION: failed to un-register tty driver, " "errno=%d,%d\n", -i, -j); restore_flags(flags); return; } if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) printk("STALLION: failed to un-register serial memory device, " "errno=%d\n", -i); if (stl_tmpwritebuf != (char *) NULL) kfree_s(stl_tmpwritebuf, STL_TXBUFSIZE); for (i = 0; (i < stl_nrbrds); i++) { brdp = stl_brds[i]; for (j = 0; (j < STL_MAXPANELS); j++) { panelp = brdp->panels[j]; if (panelp == (stlpanel_t *) NULL) continue; for (k = 0; (k < STL_PORTSPERPANEL); k++) { portp = panelp->ports[k]; if (portp == (stlport_t *) NULL) continue; if (portp->tty != (struct tty_struct *) NULL) stl_hangup(portp->tty); if (portp->tx.buf != (char *) NULL) kfree_s(portp->tx.buf, STL_TXBUFSIZE); kfree_s(portp, sizeof(stlport_t)); } kfree_s(panelp, sizeof(stlpanel_t)); } release_region(brdp->ioaddr1, brdp->iosize1); if (brdp->iosize2 > 0) release_region(brdp->ioaddr2, brdp->iosize2); kfree_s(brdp, sizeof(stlbrd_t)); stl_brds[i] = (stlbrd_t *) NULL; } for (i = 0; (i < stl_numintrs); i++) free_irq(stl_gotintrs[i], NULL); restore_flags(flags); } #endif /*****************************************************************************/ /* * Local driver kernel memory allocation routine. */ static void *stl_memalloc(int len) { return((void *) kmalloc(len, GFP_KERNEL)); } /*****************************************************************************/ static int stl_open(struct tty_struct *tty, struct file *filp) { stlport_t *portp; stlbrd_t *brdp; unsigned int minordev; int brdnr, panelnr, portnr, rc; #if DEBUG printk("stl_open(tty=%x,filp=%x): device=%x\n", (int) tty, (int) filp, tty->device); #endif minordev = MINOR(tty->device); brdnr = MKDEV2BRD(minordev); if (brdnr >= stl_nrbrds) return(-ENODEV); brdp = stl_brds[brdnr]; if (brdp == (stlbrd_t *) NULL) return(-ENODEV); minordev = MKDEV2PORT(minordev); for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { if (brdp->panels[panelnr] == (stlpanel_t *) NULL) break; if (minordev < brdp->panels[panelnr]->nrports) { portnr = minordev; break; } minordev -= brdp->panels[panelnr]->nrports; } if (portnr < 0) return(-ENODEV); portp = brdp->panels[panelnr]->ports[portnr]; if (portp == (stlport_t *) NULL) return(-ENODEV); MOD_INC_USE_COUNT; /* * On the first open of the device setup the port hardware, and * initialize the per port data structure. */ portp->tty = tty; tty->driver_data = portp; portp->refcount++; if ((portp->flags & ASYNC_INITIALIZED) == 0) { if (portp->tx.buf == (char *) NULL) { portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE); if (portp->tx.buf == (char *) NULL) return(-ENOMEM); portp->tx.head = portp->tx.buf; portp->tx.tail = portp->tx.buf; } stl_setport(portp, tty->termios); portp->sigs = stl_getsignals(portp); stl_setsignals(portp, 1, 1); stl_enablerxtx(portp, 1, 1); stl_startrxtx(portp, 1, 0); clear_bit(TTY_IO_ERROR, &tty->flags); portp->flags |= ASYNC_INITIALIZED; } /* * Check if this port is in the middle of closing. If so then wait * until it is closed then return error status, based on flag settings. * The sleep here does not need interrupt protection since the wakeup * for it is done with the same context. */ if (portp->flags & ASYNC_CLOSING) { interruptible_sleep_on(&portp->close_wait); if (portp->flags & ASYNC_HUP_NOTIFY) return(-EAGAIN); return(-ERESTARTSYS); } /* * Based on type of open being done check if it can overlap with any * previous opens still in effect. If we are a normal serial device * then also we might have to wait for carrier. */ if (tty->driver.subtype == STL_DRVTYPCALLOUT) { if (portp->flags & ASYNC_NORMAL_ACTIVE) return(-EBUSY); if (portp->flags & ASYNC_CALLOUT_ACTIVE) { if ((portp->flags & ASYNC_SESSION_LOCKOUT) && (portp->session != current->session)) return(-EBUSY); if ((portp->flags & ASYNC_PGRP_LOCKOUT) && (portp->pgrp != current->pgrp)) return(-EBUSY); } portp->flags |= ASYNC_CALLOUT_ACTIVE; } else { if (filp->f_flags & O_NONBLOCK) { if (portp->flags & ASYNC_CALLOUT_ACTIVE) return(-EBUSY); } else { if ((rc = stl_waitcarrier(portp, filp)) != 0) return(rc); } portp->flags |= ASYNC_NORMAL_ACTIVE; } if ((portp->refcount == 1) && (portp->flags & ASYNC_SPLIT_TERMIOS)) { if (tty->driver.subtype == STL_DRVTYPSERIAL) *tty->termios = portp->normaltermios; else *tty->termios = portp->callouttermios; stl_setport(portp, tty->termios); } portp->session = current->session; portp->pgrp = current->pgrp; return(0); } /*****************************************************************************/ /* * Possibly need to wait for carrier (DCD signal) to come high. Say * maybe because if we are clocal then we don't need to wait... */ static int stl_waitcarrier(stlport_t *portp, struct file *filp) { unsigned long flags; int rc, doclocal; #if DEBUG printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp); #endif rc = 0; doclocal = 0; if (portp->flags & ASYNC_CALLOUT_ACTIVE) { if (portp->normaltermios.c_cflag & CLOCAL) doclocal++; } else { if (portp->tty->termios->c_cflag & CLOCAL) doclocal++; } save_flags(flags); cli(); portp->openwaitcnt++; if (! tty_hung_up_p(filp)) portp->refcount--; for (;;) { if ((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) stl_setsignals(portp, 1, 1); if (tty_hung_up_p(filp) || ((portp->flags & ASYNC_INITIALIZED) == 0)) { if (portp->flags & ASYNC_HUP_NOTIFY) rc = -EBUSY; else rc = -ERESTARTSYS; break; } if (((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) && ((portp->flags & ASYNC_CLOSING) == 0) && (doclocal || (portp->sigs & TIOCM_CD))) { break; } if (current->signal & ~current->blocked) { rc = -ERESTARTSYS; break; } interruptible_sleep_on(&portp->open_wait); } if (! tty_hung_up_p(filp)) portp->refcount++; portp->openwaitcnt--; restore_flags(flags); return(rc); } /*****************************************************************************/ static void stl_close(struct tty_struct *tty, struct file *filp) { stlport_t *portp; unsigned long flags; #if DEBUG printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp); #endif portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; save_flags(flags); cli(); if (tty_hung_up_p(filp)) { MOD_DEC_USE_COUNT; restore_flags(flags); return; } if ((tty->count == 1) && (portp->refcount != 1)) portp->refcount = 1; if (portp->refcount-- > 1) { MOD_DEC_USE_COUNT; restore_flags(flags); return; } portp->refcount = 0; portp->flags |= ASYNC_CLOSING; if (portp->flags & ASYNC_NORMAL_ACTIVE) portp->normaltermios = *tty->termios; if (portp->flags & ASYNC_CALLOUT_ACTIVE) portp->callouttermios = *tty->termios; /* * May want to wait for any data to drain before closing. The BUSY * flag keeps track of whether we are still sending or not - it is * very accurate for the cd1400, not quite so for the sc26198. * (The sc26198 has no "end-of-data" interrupt only empty FIFO) */ tty->closing = 1; if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) tty_wait_until_sent(tty, portp->closing_wait); stl_waituntilsent(tty, (HZ / 2)); portp->flags &= ~ASYNC_INITIALIZED; stl_disableintrs(portp); if (tty->termios->c_cflag & HUPCL) stl_setsignals(portp, 0, 0); stl_enablerxtx(portp, 0, 0); stl_flushbuffer(tty); portp->istate = 0; if (portp->tx.buf != (char *) NULL) { kfree_s(portp->tx.buf, STL_TXBUFSIZE); portp->tx.buf = (char *) NULL; portp->tx.head = (char *) NULL; portp->tx.tail = (char *) NULL; } set_bit(TTY_IO_ERROR, &tty->flags); if (tty->ldisc.flush_buffer) (tty->ldisc.flush_buffer)(tty); tty->closing = 0; portp->tty = (struct tty_struct *) NULL; if (portp->openwaitcnt) { if (portp->close_delay) stl_delay(portp->close_delay); wake_up_interruptible(&portp->open_wait); } portp->flags &= ~(ASYNC_CALLOUT_ACTIVE | ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); wake_up_interruptible(&portp->close_wait); MOD_DEC_USE_COUNT; restore_flags(flags); } /*****************************************************************************/ /* * Wait for a specified delay period, this is not a busy-loop. It will * give up the processor while waiting. Unfortunately this has some * rather intimate knowledge of the process management stuff. */ static void stl_delay(int len) { #if DEBUG printk("stl_delay(len=%d)\n", len); #endif if (len > 0) { current->state = TASK_INTERRUPTIBLE; current->timeout = jiffies + len; schedule(); } } /*****************************************************************************/ /* * Write routine. Take data and stuff it in to the TX ring queue. * If transmit interrupts are not running then start them. */ static int stl_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count) { stlport_t *portp; unsigned int len, stlen; unsigned long flags; unsigned char *chbuf; char *head, *tail; #if DEBUG printk("stl_write(tty=%x,from_user=%d,buf=%x,count=%d)\n", (int) tty, from_user, (int) buf, count); #endif if ((tty == (struct tty_struct *) NULL) || (stl_tmpwritebuf == (char *) NULL)) return(0); portp = tty->driver_data; if (portp == (stlport_t *) NULL) return(0); if (portp->tx.buf == (char *) NULL) return(0); /* * If copying direct from user space we must cater for page faults, * causing us to "sleep" here for a while. To handle this copy in all * the data we need now, into a local buffer. Then when we got it all * copy it into the TX buffer. */ chbuf = (unsigned char *) buf; if (from_user) { head = portp->tx.head; tail = portp->tx.tail; len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1); count = MIN(len, count); save_flags(flags); cli(); down(&stl_tmpwritesem); memcpy_fromfs(stl_tmpwritebuf, chbuf, count); up(&stl_tmpwritesem); restore_flags(flags); chbuf = &stl_tmpwritebuf[0]; } head = portp->tx.head; tail = portp->tx.tail; if (head >= tail) { len = STL_TXBUFSIZE - (head - tail) - 1; stlen = STL_TXBUFSIZE - (head - portp->tx.buf); } else { len = tail - head - 1; stlen = len; } len = MIN(len, count); count = 0; while (len > 0) { stlen = MIN(len, stlen); memcpy(head, chbuf, stlen); len -= stlen; chbuf += stlen; count += stlen; head += stlen; if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { head = portp->tx.buf; stlen = tail - head; } } portp->tx.head = head; clear_bit(ASYI_TXLOW, &portp->istate); stl_startrxtx(portp, -1, 1); return(count); } /*****************************************************************************/ static void stl_putchar(struct tty_struct *tty, unsigned char ch) { stlport_t *portp; unsigned int len; char *head, *tail; #if DEBUG printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; if (portp->tx.buf == (char *) NULL) return; head = portp->tx.head; tail = portp->tx.tail; len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); len--; if (len > 0) { *head++ = ch; if (head >= (portp->tx.buf + STL_TXBUFSIZE)) head = portp->tx.buf; } portp->tx.head = head; } /*****************************************************************************/ /* * If there are any characters in the buffer then make sure that TX * interrupts are on and get'em out. Normally used after the putchar * routine has been called. */ static void stl_flushchars(struct tty_struct *tty) { stlport_t *portp; #if DEBUG printk("stl_flushchars(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; if (portp->tx.buf == (char *) NULL) return; #if 0 if (tty->stopped || tty->hw_stopped || (portp->tx.head == portp->tx.tail)) return; #endif stl_startrxtx(portp, -1, 1); } /*****************************************************************************/ static int stl_writeroom(struct tty_struct *tty) { stlport_t *portp; char *head, *tail; #if DEBUG printk("stl_writeroom(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return(0); portp = tty->driver_data; if (portp == (stlport_t *) NULL) return(0); if (portp->tx.buf == (char *) NULL) return(0); head = portp->tx.head; tail = portp->tx.tail; return((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); } /*****************************************************************************/ /* * Return number of chars in the TX buffer. Normally we would just * calculate the number of chars in the buffer and return that, but if * the buffer is empty and TX interrupts are still on then we return * that the buffer still has 1 char in it. This way whoever called us * will not think that ALL chars have drained - since the UART still * must have some chars in it (we are busy after all). */ static int stl_charsinbuffer(struct tty_struct *tty) { stlport_t *portp; unsigned int size; char *head, *tail; #if DEBUG printk("stl_charsinbuffer(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return(0); portp = tty->driver_data; if (portp == (stlport_t *) NULL) return(0); if (portp->tx.buf == (char *) NULL) return(0); head = portp->tx.head; tail = portp->tx.tail; size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) size = 1; return(size); } /*****************************************************************************/ /* * Generate the serial struct info. */ static void stl_getserial(stlport_t *portp, struct serial_struct *sp) { struct serial_struct sio; stlbrd_t *brdp; #if DEBUG printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); #endif memset(&sio, 0, sizeof(struct serial_struct)); sio.line = portp->portnr; sio.port = portp->ioaddr; sio.flags = portp->flags; sio.baud_base = portp->baud_base; sio.close_delay = portp->close_delay; sio.closing_wait = portp->closing_wait; sio.custom_divisor = portp->custom_divisor; sio.hub6 = 0; if (portp->uartp == &stl_cd1400uart) { sio.type = PORT_CIRRUS; sio.xmit_fifo_size = CD1400_TXFIFOSIZE; } else { sio.type = PORT_UNKNOWN; sio.xmit_fifo_size = SC26198_TXFIFOSIZE; } brdp = stl_brds[portp->brdnr]; if (brdp != (stlbrd_t *) NULL) sio.irq = brdp->irq; memcpy_tofs(sp, &sio, sizeof(struct serial_struct)); } /*****************************************************************************/ /* * Set port according to the serial struct info. * At this point we do not do any auto-configure stuff, so we will * just quietly ignore any requests to change irq, etc. */ static int stl_setserial(stlport_t *portp, struct serial_struct *sp) { struct serial_struct sio; #if DEBUG printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); #endif memcpy_fromfs(&sio, sp, sizeof(struct serial_struct)); if (!suser()) { if ((sio.baud_base != portp->baud_base) || (sio.close_delay != portp->close_delay) || ((sio.flags & ~ASYNC_USR_MASK) != (portp->flags & ~ASYNC_USR_MASK))) return(-EPERM); } portp->flags = (portp->flags & ~ASYNC_USR_MASK) | (sio.flags & ASYNC_USR_MASK); portp->baud_base = sio.baud_base; portp->close_delay = sio.close_delay; portp->closing_wait = sio.closing_wait; portp->custom_divisor = sio.custom_divisor; stl_setport(portp, portp->tty->termios); return(0); } /*****************************************************************************/ static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { stlport_t *portp; unsigned long val; int rc; #if DEBUG printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", (int) tty, (int) file, cmd, (int) arg); #endif if (tty == (struct tty_struct *) NULL) return(-ENODEV); portp = tty->driver_data; if (portp == (stlport_t *) NULL) return(-ENODEV); if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { if (tty->flags & (1 << TTY_IO_ERROR)) return(-EIO); } rc = 0; switch (cmd) { case TCSBRK: if ((rc = tty_check_change(tty)) == 0) { tty_wait_until_sent(tty, 0); if (! arg) stl_sendbreak(portp, 250); } break; case TCSBRKP: if ((rc = tty_check_change(tty)) == 0) { tty_wait_until_sent(tty, 0); stl_sendbreak(portp, (arg ? (arg * 100) : 250)); } break; case TIOCGSOFTCAR: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long))) == 0) put_fs_long(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), (unsigned long *) arg); break; case TIOCSSOFTCAR: if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) { arg = get_fs_long((unsigned long *) arg); tty->termios->c_cflag = (tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0); } break; case TIOCMGET: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned int))) == 0) { val = (unsigned long) stl_getsignals(portp); put_fs_long(val, (unsigned long *) arg); } break; case TIOCMBIS: if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) { arg = get_fs_long((unsigned long *) arg); stl_setsignals(portp, ((arg & TIOCM_DTR) ? 1 : -1), ((arg & TIOCM_RTS) ? 1 : -1)); } break; case TIOCMBIC: if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) { arg = get_fs_long((unsigned long *) arg); stl_setsignals(portp, ((arg & TIOCM_DTR) ? 0 : -1), ((arg & TIOCM_RTS) ? 0 : -1)); } break; case TIOCMSET: if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) { arg = get_fs_long((unsigned long *) arg); stl_setsignals(portp, ((arg & TIOCM_DTR) ? 1 : 0), ((arg & TIOCM_RTS) ? 1 : 0)); } break; case TIOCGSERIAL: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(struct serial_struct))) == 0) stl_getserial(portp, (struct serial_struct *) arg); break; case TIOCSSERIAL: if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(struct serial_struct))) == 0) rc = stl_setserial(portp, (struct serial_struct *) arg); break; case COM_GETPORTSTATS: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0) rc = stl_getportstats(portp, (comstats_t *) arg); break; case COM_CLRPORTSTATS: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0) rc = stl_clrportstats(portp, (comstats_t *) arg); break; case TIOCSERCONFIG: case TIOCSERGWILD: case TIOCSERSWILD: case TIOCSERGETLSR: case TIOCSERGSTRUCT: case TIOCSERGETMULTI: case TIOCSERSETMULTI: default: rc = -ENOIOCTLCMD; break; } return(rc); } /*****************************************************************************/ static void stl_settermios(struct tty_struct *tty, struct termios *old) { stlport_t *portp; struct termios *tiosp; #if DEBUG printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; tiosp = tty->termios; if ((tiosp->c_cflag == old->c_cflag) && (tiosp->c_iflag == old->c_iflag)) return; stl_setport(portp, tiosp); stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), -1); if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { tty->hw_stopped = 0; stl_start(tty); } if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) wake_up_interruptible(&portp->open_wait); } /*****************************************************************************/ /* * Attempt to flow control who ever is sending us data. Based on termios * settings use software or/and hardware flow control. */ static void stl_throttle(struct tty_struct *tty) { stlport_t *portp; #if DEBUG printk("stl_throttle(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_flowctrl(portp, 0); } /*****************************************************************************/ /* * Unflow control the device sending us data... */ static void stl_unthrottle(struct tty_struct *tty) { stlport_t *portp; #if DEBUG printk("stl_unthrottle(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_flowctrl(portp, 1); } /*****************************************************************************/ /* * Stop the transmitter. Basically to do this we will just turn TX * interrupts off. */ static void stl_stop(struct tty_struct *tty) { stlport_t *portp; #if DEBUG printk("stl_stop(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_startrxtx(portp, -1, 0); } /*****************************************************************************/ /* * Start the transmitter again. Just turn TX interrupts back on. */ static void stl_start(struct tty_struct *tty) { stlport_t *portp; #if DEBUG printk("stl_start(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_startrxtx(portp, -1, 1); } /*****************************************************************************/ /* * Hangup this port. This is pretty much like closing the port, only * a little more brutal. No waiting for data to drain. Shutdown the * port and maybe drop signals. */ static void stl_hangup(struct tty_struct *tty) { stlport_t *portp; #if DEBUG printk("stl_hangup(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; portp->flags &= ~ASYNC_INITIALIZED; stl_disableintrs(portp); if (tty->termios->c_cflag & HUPCL) stl_setsignals(portp, 0, 0); stl_enablerxtx(portp, 0, 0); stl_flushbuffer(tty); portp->istate = 0; set_bit(TTY_IO_ERROR, &tty->flags); if (portp->tx.buf != (char *) NULL) { kfree_s(portp->tx.buf, STL_TXBUFSIZE); portp->tx.buf = (char *) NULL; portp->tx.head = (char *) NULL; portp->tx.tail = (char *) NULL; } portp->tty = (struct tty_struct *) NULL; portp->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE); portp->refcount = 0; wake_up_interruptible(&portp->open_wait); } /*****************************************************************************/ static void stl_flushbuffer(struct tty_struct *tty) { stlport_t *portp; #if DEBUG printk("stl_flushbuffer(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_flush(portp); wake_up_interruptible(&tty->write_wait); if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) (tty->ldisc.write_wakeup)(tty); } /*****************************************************************************/ static void stl_waituntilsent(struct tty_struct *tty, int timeout) { stlport_t *portp; unsigned long tend; #if DEBUG printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; if (timeout == 0) timeout = HZ; tend = jiffies + timeout; while (stl_datastate(portp)) { if (current->signal & ~current->blocked) break; stl_delay(2); if (jiffies >= tend) break; } } /*****************************************************************************/ /* * All board interrupts are vectored through here first. This code then * calls off to the approrpriate board interrupt handlers. */ static void stl_intr(int irq, void *dev_id, struct pt_regs *regs) { stlbrd_t *brdp; int i; #if DEBUG printk("stl_intr(irq=%d,regs=%x)\n", irq, (int) regs); #endif for (i = 0; (i < stl_nrbrds); i++) { if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) continue; if (brdp->state == 0) continue; (* brdp->isr)(brdp); } } /*****************************************************************************/ /* * Interrupt service routine for EasyIO board types. */ static void stl_eiointr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int iobase; panelp = brdp->panels[0]; iobase = panelp->iobase; while (inb(brdp->iostatus) & EIO_INTRPEND) (* panelp->isr)(panelp, iobase); } /*****************************************************************************/ /* * Interrupt service routine for ECH-AT board types. */ static void stl_echatintr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr; outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); while (inb(brdp->iostatus) & ECH_INTRPEND) { for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); } } } outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); } /*****************************************************************************/ /* * Interrupt service routine for ECH-MCA board types. */ static void stl_echmcaintr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr; while (inb(brdp->iostatus) & ECH_INTRPEND) { for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); } } } } /*****************************************************************************/ /* * Interrupt service routine for ECH-PCI board types. */ static void stl_echpciintr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr, recheck; while (1) { recheck = 0; for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); recheck++; } } if (! recheck) break; } } /*****************************************************************************/ /* * Interrupt service routine for ECH-8/64-PCI board types. */ static void stl_echpci64intr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr; while (inb(brdp->ioctrl) & 0x1) { for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); } } } } /*****************************************************************************/ /* * Service an off-level request for some channel. */ static void stl_offintr(void *private) { stlport_t *portp; struct tty_struct *tty; unsigned int oldsigs; portp = private; #if DEBUG printk("stl_offintr(portp=%x)\n", (int) portp); #endif if (portp == (stlport_t *) NULL) return; tty = portp->tty; if (tty == (struct tty_struct *) NULL) return; if (test_bit(ASYI_TXLOW, &portp->istate)) { if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) (tty->ldisc.write_wakeup)(tty); wake_up_interruptible(&tty->write_wait); } if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { clear_bit(ASYI_DCDCHANGE, &portp->istate); oldsigs = portp->sigs; portp->sigs = stl_getsignals(portp); if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) wake_up_interruptible(&portp->open_wait); if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { if (portp->flags & ASYNC_CHECK_CD) { if (! ((portp->flags & ASYNC_CALLOUT_ACTIVE) && (portp->flags & ASYNC_CALLOUT_NOHUP))) { tty_hangup(tty); } } } } } /*****************************************************************************/ /* * Map in interrupt vector to this driver. Check that we don't * already have this vector mapped, we might be sharing this * interrupt across multiple boards. */ static int stl_mapirq(int irq, char *name) { int rc, i; #if DEBUG printk("stl_mapirq(irq=%d,name=%s)\n", irq, name); #endif rc = 0; for (i = 0; (i < stl_numintrs); i++) { if (stl_gotintrs[i] == irq) break; } if (i >= stl_numintrs) { if (request_irq(irq, stl_intr, SA_INTERRUPT, name, NULL) != 0) { printk("STALLION: failed to register interrupt " "routine for %s irq=%d\n", name, irq); rc = -ENODEV; } else { stl_gotintrs[stl_numintrs++] = irq; } } return(rc); } /*****************************************************************************/ /* * Initialize all the ports on a panel. */ static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp) { stlport_t *portp; int chipmask, i; #if DEBUG printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); #endif chipmask = stl_panelinit(brdp, panelp); /* * All UART's are initialized (if found!). Now go through and setup * each ports data structures. */ for (i = 0; (i < panelp->nrports); i++) { portp = (stlport_t *) stl_memalloc(sizeof(stlport_t)); if (portp == (stlport_t *) NULL) { printk("STALLION: failed to allocate memory " "(size=%d)\n", sizeof(stlport_t)); break; } memset(portp, 0, sizeof(stlport_t)); portp->magic = STL_PORTMAGIC; portp->portnr = i; portp->brdnr = panelp->brdnr; portp->panelnr = panelp->panelnr; portp->uartp = panelp->uartp; portp->clk = brdp->clk; portp->baud_base = STL_BAUDBASE; portp->close_delay = STL_CLOSEDELAY; portp->closing_wait = 30 * HZ; portp->normaltermios = stl_deftermios; portp->callouttermios = stl_deftermios; portp->tqueue.routine = stl_offintr; portp->tqueue.data = portp; portp->stats.brd = portp->brdnr; portp->stats.panel = portp->panelnr; portp->stats.port = portp->portnr; panelp->ports[i] = portp; stl_portinit(brdp, panelp, portp); } return(0); } /*****************************************************************************/ /* * Try to find and initialize an EasyIO board. */ static inline int stl_initeio(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int status; char *name; int rc; #if DEBUG printk("stl_initeio(brdp=%x)\n", (int) brdp); #endif brdp->ioctrl = brdp->ioaddr1 + 1; brdp->iostatus = brdp->ioaddr1 + 2; status = inb(brdp->iostatus); if ((status & EIO_IDBITMASK) == EIO_MK3) brdp->ioctrl++; /* * Handle board specific stuff now. The real difference is PCI * or not PCI. */ if (brdp->brdtype == BRD_EASYIOPCI) { brdp->iosize1 = 0x80; brdp->iosize2 = 0x80; name = "serial(EIO-PCI)"; outb(0x41, (brdp->ioaddr2 + 0x4c)); } else { brdp->iosize1 = 8; name = "serial(EIO)"; if ((brdp->irq < 0) || (brdp->irq > 15) || (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr); return(-EINVAL); } outb((stl_vecmap[brdp->irq] | EIO_0WS | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), brdp->ioctrl); } if (check_region(brdp->ioaddr1, brdp->iosize1)) { printk("STALLION: Warning, unit %d I/O address %x conflicts " "with another device\n", brdp->brdnr, brdp->ioaddr1); } if (brdp->iosize2 > 0) { if (check_region(brdp->ioaddr2, brdp->iosize2)) { printk("STALLION: Warning, unit %d I/O address %x " "conflicts with another device\n", brdp->brdnr, brdp->ioaddr2); } } /* * Everything looks OK, so lets go ahead and probe for the hardware. */ brdp->clk = CD1400_CLK; brdp->isr = stl_eiointr; switch (status & EIO_IDBITMASK) { case EIO_8PORTM: brdp->clk = CD1400_CLK8M; /* fall thru */ case EIO_8PORTRS: case EIO_8PORTDI: brdp->nrports = 8; break; case EIO_4PORTRS: brdp->nrports = 4; break; case EIO_MK3: switch (status & EIO_BRDMASK) { case ID_BRD4: brdp->nrports = 4; break; case ID_BRD8: brdp->nrports = 8; break; case ID_BRD16: brdp->nrports = 16; break; default: return(-ENODEV); } break; default: return(-ENODEV); } /* * We have verfied that the board is actually present, so now we * can complete the setup. */ request_region(brdp->ioaddr1, brdp->iosize1, name); if (brdp->iosize2 > 0) request_region(brdp->ioaddr2, brdp->iosize2, name); panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t)); if (panelp == (stlpanel_t *) NULL) { printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlpanel_t)); return(-ENOMEM); } memset(panelp, 0, sizeof(stlpanel_t)); panelp->magic = STL_PANELMAGIC; panelp->brdnr = brdp->brdnr; panelp->panelnr = 0; panelp->nrports = brdp->nrports; panelp->iobase = brdp->ioaddr1; panelp->hwid = status; if ((status & EIO_IDBITMASK) == EIO_MK3) { panelp->uartp = (void *) &stl_sc26198uart; panelp->isr = stl_sc26198intr; } else { panelp->uartp = (void *) &stl_cd1400uart; panelp->isr = stl_cd1400eiointr; } brdp->panels[0] = panelp; brdp->nrpanels = 1; brdp->state |= BRD_FOUND; brdp->hwid = status; rc = stl_mapirq(brdp->irq, name); return(rc); } /*****************************************************************************/ /* * Try to find an ECH board and initialize it. This code is capable of * dealing with all types of ECH board. */ static inline int stl_initech(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int status, nxtid, ioaddr, conflict; int panelnr, banknr, i; char *name; #if DEBUG printk("stl_initech(brdp=%x)\n", (int) brdp); #endif status = 0; conflict = 0; /* * Set up the initial board register contents for boards. This varies a * bit between the different board types. So we need to handle each * separately. Also do a check that the supplied IRQ is good. */ switch (brdp->brdtype) { case BRD_ECH: brdp->isr = stl_echatintr; brdp->ioctrl = brdp->ioaddr1 + 1; brdp->iostatus = brdp->ioaddr1 + 1; status = inb(brdp->iostatus); if ((status & ECH_IDBITMASK) != ECH_ID) return(-ENODEV); if ((brdp->irq < 0) || (brdp->irq > 15) || (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr); return(-EINVAL); } status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); status |= (stl_vecmap[brdp->irq] << 1); outb((status | ECH_BRDRESET), brdp->ioaddr1); brdp->ioctrlval = ECH_INTENABLE | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); for (i = 0; (i < 10); i++) outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); brdp->iosize1 = 2; brdp->iosize2 = 32; name = "serial(EC8/32)"; outb(status, brdp->ioaddr1); break; case BRD_ECHMC: brdp->isr = stl_echmcaintr; brdp->ioctrl = brdp->ioaddr1 + 0x20; brdp->iostatus = brdp->ioctrl; status = inb(brdp->iostatus); if ((status & ECH_IDBITMASK) != ECH_ID) return(-ENODEV); if ((brdp->irq < 0) || (brdp->irq > 15) || (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr); return(-EINVAL); } outb(ECHMC_BRDRESET, brdp->ioctrl); outb(ECHMC_INTENABLE, brdp->ioctrl); brdp->iosize1 = 64; name = "serial(EC8/32-MC)"; break; case BRD_ECHPCI: brdp->isr = stl_echpciintr; brdp->ioctrl = brdp->ioaddr1 + 2; brdp->iosize1 = 4; brdp->iosize2 = 8; name = "serial(EC8/32-PCI)"; break; case BRD_ECH64PCI: brdp->isr = stl_echpci64intr; brdp->ioctrl = brdp->ioaddr2 + 0x40; outb(0x43, (brdp->ioaddr1 + 0x4c)); brdp->iosize1 = 0x80; brdp->iosize2 = 0x80; name = "serial(EC8/64-PCI)"; break; default: printk("STALLION: unknown board type=%d\n", brdp->brdtype); return(-EINVAL); break; } /* * Check boards for possible IO address conflicts. We won't actually * do anything about it here, just issue a warning... */ conflict = check_region(brdp->ioaddr1, brdp->iosize1) ? brdp->ioaddr1 : 0; if ((conflict == 0) && (brdp->iosize2 > 0)) conflict = check_region(brdp->ioaddr2, brdp->iosize2) ? brdp->ioaddr2 : 0; if (conflict) { printk("STALLION: Warning, unit %d I/O address %x conflicts " "with another device\n", brdp->brdnr, conflict); } request_region(brdp->ioaddr1, brdp->iosize1, name); if (brdp->iosize2 > 0) request_region(brdp->ioaddr2, brdp->iosize2, name); /* * Scan through the secondary io address space looking for panels. * As we find'em allocate and initialize panel structures for each. */ brdp->clk = CD1400_CLK; brdp->hwid = status; ioaddr = brdp->ioaddr2; banknr = 0; panelnr = 0; nxtid = 0; for (i = 0; (i < STL_MAXPANELS); i++) { if (brdp->brdtype == BRD_ECHPCI) { outb(nxtid, brdp->ioctrl); ioaddr = brdp->ioaddr2; } status = inb(ioaddr + ECH_PNLSTATUS); if ((status & ECH_PNLIDMASK) != nxtid) break; panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t)); if (panelp == (stlpanel_t *) NULL) { printk("STALLION: failed to allocate memory " "(size=%d)\n", sizeof(stlpanel_t)); break; } memset(panelp, 0, sizeof(stlpanel_t)); panelp->magic = STL_PANELMAGIC; panelp->brdnr = brdp->brdnr; panelp->panelnr = panelnr; panelp->iobase = ioaddr; panelp->pagenr = nxtid; panelp->hwid = status; brdp->bnk2panel[banknr] = panelp; brdp->bnkpageaddr[banknr] = nxtid; brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; if (status & ECH_PNLXPID) { panelp->uartp = (void *) &stl_sc26198uart; panelp->isr = stl_sc26198intr; if (status & ECH_PNL16PORT) { panelp->nrports = 16; brdp->bnk2panel[banknr] = panelp; brdp->bnkpageaddr[banknr] = nxtid; brdp->bnkstataddr[banknr++] = ioaddr + 4 + ECH_PNLSTATUS; } else { panelp->nrports = 8; } } else { panelp->uartp = (void *) &stl_cd1400uart; panelp->isr = stl_cd1400echintr; if (status & ECH_PNL16PORT) { panelp->nrports = 16; panelp->ackmask = 0x80; if (brdp->brdtype != BRD_ECHPCI) ioaddr += EREG_BANKSIZE; brdp->bnk2panel[banknr] = panelp; brdp->bnkpageaddr[banknr] = ++nxtid; brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; } else { panelp->nrports = 8; panelp->ackmask = 0xc0; } } nxtid++; ioaddr += EREG_BANKSIZE; brdp->nrports += panelp->nrports; brdp->panels[panelnr++] = panelp; if ((brdp->brdtype != BRD_ECHPCI) && (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) break; } brdp->nrpanels = panelnr; brdp->nrbnks = banknr; if (brdp->brdtype == BRD_ECH) outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); brdp->state |= BRD_FOUND; i = stl_mapirq(brdp->irq, name); return(i); } /*****************************************************************************/ /* * Initialize and configure the specified board. * Scan through all the boards in the configuration and see what we * can find. Handle EIO and the ECH boards a little differently here * since the initial search and setup is very different. */ static int stl_brdinit(stlbrd_t *brdp) { int i; #if DEBUG printk("stl_brdinit(brdp=%x)\n", (int) brdp); #endif switch (brdp->brdtype) { case BRD_EASYIO: case BRD_EASYIOPCI: stl_initeio(brdp); break; case BRD_ECH: case BRD_ECHMC: case BRD_ECHPCI: case BRD_ECH64PCI: stl_initech(brdp); break; default: printk("STALLION: unit=%d is unknown board type=%d\n", brdp->brdnr, brdp->brdtype); return(ENODEV); } stl_brds[brdp->brdnr] = brdp; if ((brdp->state & BRD_FOUND) == 0) { printk("STALLION: %s board not found, unit=%d io=%x irq=%d\n", stl_brdnames[brdp->brdtype], brdp->brdnr, brdp->ioaddr1, brdp->irq); return(ENODEV); } for (i = 0; (i < STL_MAXPANELS); i++) if (brdp->panels[i] != (stlpanel_t *) NULL) stl_initports(brdp, brdp->panels[i]); printk("STALLION: %s found, unit=%d io=%x irq=%d " "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, brdp->nrports); return(0); } /*****************************************************************************/ #ifdef CONFIG_PCI /* * We have a Stallion board. Allocate a board structure and * initialize it. Read its IO and IRQ resources from PCI * configuration space. */ static inline int stl_initpcibrd(int brdtype, unsigned char busnr, unsigned char devnr) { unsigned int bar[4]; stlbrd_t *brdp; int i, rc; unsigned char irq; #if DEBUG printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, busnr, devnr); #endif brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t)); if (brdp == (stlbrd_t *) NULL) { printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlbrd_t)); return(-ENOMEM); } memset(brdp, 0, sizeof(stlbrd_t)); brdp->magic = STL_BOARDMAGIC; brdp->brdnr = stl_nrbrds++; brdp->brdtype = brdtype; /* * Read in all the BAR registers from this board. Different Stallion * boards use these in different ways, so we just read in the whole * lot and then figure out what is what later. */ for (i = 0; (i < 4); i++) { rc = pcibios_read_config_dword(busnr, devnr, (PCI_BASE_ADDRESS_0 + (i * 0x4)), &bar[i]); if (rc) { printk("STALLION: failed to read BAR register %d " "from PCI board, errno=%x\n", i, rc); return(0); } } rc = pcibios_read_config_byte(busnr, devnr, PCI_INTERRUPT_LINE, &irq); if (rc) { printk("STALLION: failed to read INTERRUPT register " "from PCI board, errno=%x\n", rc); return(0); } #if DEBUG printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__, bar[0], bar[1], bar[2], bar[3], irq); #endif /* * We have all resources from the board, so lets setup the actual * board structure now. */ switch (brdtype) { case BRD_ECHPCI: brdp->ioaddr2 = (bar[0] & PCI_BASE_ADDRESS_IO_MASK); brdp->ioaddr1 = (bar[1] & PCI_BASE_ADDRESS_IO_MASK); break; case BRD_ECH64PCI: brdp->ioaddr2 = (bar[2] & PCI_BASE_ADDRESS_IO_MASK); brdp->ioaddr1 = (bar[1] & PCI_BASE_ADDRESS_IO_MASK); break; case BRD_EASYIOPCI: brdp->ioaddr1 = (bar[2] & PCI_BASE_ADDRESS_IO_MASK); brdp->ioaddr2 = (bar[1] & PCI_BASE_ADDRESS_IO_MASK); break; default: printk("STALLION: unknown PCI board type=%d\n", brdtype); break; } brdp->irq = irq; stl_brdinit(brdp); return(0); } /*****************************************************************************/ /* * Find all Stallion PCI boards that might be installed. Initialize each * one as it is found. */ static inline int stl_findpcibrds() { unsigned char busnr, devnr; unsigned short class; int i, rc, brdtypnr; #if DEBUG printk("stl_findpcibrds()\n"); #endif if (! pcibios_present()) return(0); for (i = 0; (i < stl_nrpcibrds); i++) { for (brdtypnr = 0; ; brdtypnr++) { rc = pcibios_find_device(stl_pcibrds[i].vendid, stl_pcibrds[i].devid, brdtypnr, &busnr, &devnr); if (rc) break; /* * Check that we can handle more boards... */ if (stl_nrbrds >= STL_MAXBRDS) { printk("STALLION: too many boards found, " "maximum supported %d\n", STL_MAXBRDS); i = stl_nrpcibrds; break; } /* * Found a device on the PCI bus that has our vendor and * device ID. Need to check now that it is really us. */ rc = pcibios_read_config_word(busnr, devnr, PCI_CLASS_DEVICE, &class); if (rc) { printk("STALLION: failed to read class type " "from PCI board, errno=%x\n", rc); continue; } if (class == PCI_CLASS_STORAGE_IDE) continue; rc = stl_initpcibrd(stl_pcibrds[i].brdtype, busnr, devnr); if (rc) return(rc); } } return(0); } #endif /*****************************************************************************/ /* * Scan through all the boards in the configuration and see what we * can find. Handle EIO and the ECH boards a little differently here * since the initial search and setup is too different. */ static inline int stl_initbrds() { stlbrd_t *brdp; stlconf_t *confp; int i; #if DEBUG printk("stl_initbrds()\n"); #endif if (stl_nrbrds > STL_MAXBRDS) { printk("STALLION: too many boards in configuration table, " "truncating to %d\n", STL_MAXBRDS); stl_nrbrds = STL_MAXBRDS; } /* * Firstly scan the list of static boards configured. Allocate * resources and initialize the boards as found. */ for (i = 0; (i < stl_nrbrds); i++) { confp = &stl_brdconf[i]; brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t)); if (brdp == (stlbrd_t *) NULL) { printk("STALLION: failed to allocate memory " "(size=%d)\n", sizeof(stlbrd_t)); return(-ENOMEM); } memset(brdp, 0, sizeof(stlbrd_t)); brdp->magic = STL_BOARDMAGIC; brdp->brdnr = i; brdp->brdtype = confp->brdtype; brdp->ioaddr1 = confp->ioaddr1; brdp->ioaddr2 = confp->ioaddr2; brdp->irq = confp->irq; brdp->irqtype = confp->irqtype; stl_brdinit(brdp); } #ifdef CONFIG_PCI /* * If the PCI BIOS support is compiled in then let's go looking for * ECH-PCI boards. */ stl_findpcibrds(); #endif return(0); } /*****************************************************************************/ /* * Return the board stats structure to user app. */ static int stl_getbrdstats(combrd_t *bp) { stlbrd_t *brdp; stlpanel_t *panelp; int i; memcpy_fromfs(&stl_brdstats, bp, sizeof(combrd_t)); if (stl_brdstats.brd >= STL_MAXBRDS) return(-ENODEV); brdp = stl_brds[stl_brdstats.brd]; if (brdp == (stlbrd_t *) NULL) return(-ENODEV); memset(&stl_brdstats, 0, sizeof(combrd_t)); stl_brdstats.brd = brdp->brdnr; stl_brdstats.type = brdp->brdtype; stl_brdstats.hwid = brdp->hwid; stl_brdstats.state = brdp->state; stl_brdstats.ioaddr = brdp->ioaddr1; stl_brdstats.ioaddr2 = brdp->ioaddr2; stl_brdstats.irq = brdp->irq; stl_brdstats.nrpanels = brdp->nrpanels; stl_brdstats.nrports = brdp->nrports; for (i = 0; (i < brdp->nrpanels); i++) { panelp = brdp->panels[i]; stl_brdstats.panels[i].panel = i; stl_brdstats.panels[i].hwid = panelp->hwid; stl_brdstats.panels[i].nrports = panelp->nrports; } memcpy_tofs(bp, &stl_brdstats, sizeof(combrd_t)); return(0); } /*****************************************************************************/ /* * Resolve the referenced port number into a port struct pointer. */ static stlport_t *stl_getport(int brdnr, int panelnr, int portnr) { stlbrd_t *brdp; stlpanel_t *panelp; if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) return((stlport_t *) NULL); brdp = stl_brds[brdnr]; if (brdp == (stlbrd_t *) NULL) return((stlport_t *) NULL); if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) return((stlport_t *) NULL); panelp = brdp->panels[panelnr]; if (panelp == (stlpanel_t *) NULL) return((stlport_t *) NULL); if ((portnr < 0) || (portnr >= panelp->nrports)) return((stlport_t *) NULL); return(panelp->ports[portnr]); } /*****************************************************************************/ /* * Return the port stats structure to user app. A NULL port struct * pointer passed in means that we need to find out from the app * what port to get stats for (used through board control device). */ static int stl_getportstats(stlport_t *portp, comstats_t *cp) { unsigned char *head, *tail; unsigned long flags; if (portp == (stlport_t *) NULL) { memcpy_fromfs(&stl_comstats, cp, sizeof(comstats_t)); portp = stl_getport(stl_comstats.brd, stl_comstats.panel, stl_comstats.port); if (portp == (stlport_t *) NULL) return(-ENODEV); } portp->stats.state = portp->istate; portp->stats.flags = portp->flags; portp->stats.hwid = portp->hwid; portp->stats.ttystate = 0; portp->stats.cflags = 0; portp->stats.iflags = 0; portp->stats.oflags = 0; portp->stats.lflags = 0; portp->stats.rxbuffered = 0; save_flags(flags); cli(); if (portp->tty != (struct tty_struct *) NULL) { if (portp->tty->driver_data == portp) { portp->stats.ttystate = portp->tty->flags; portp->stats.rxbuffered = portp->tty->flip.count; if (portp->tty->termios != (struct termios *) NULL) { portp->stats.cflags = portp->tty->termios->c_cflag; portp->stats.iflags = portp->tty->termios->c_iflag; portp->stats.oflags = portp->tty->termios->c_oflag; portp->stats.lflags = portp->tty->termios->c_lflag; } } } restore_flags(flags); head = portp->tx.head; tail = portp->tx.tail; portp->stats.txbuffered = ((head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head))); portp->stats.signals = (unsigned long) stl_getsignals(portp); memcpy_tofs(cp, &portp->stats, sizeof(comstats_t)); return(0); } /*****************************************************************************/ /* * Clear the port stats structure. We also return it zeroed out... */ static int stl_clrportstats(stlport_t *portp, comstats_t *cp) { if (portp == (stlport_t *) NULL) { memcpy_fromfs(&stl_comstats, cp, sizeof(comstats_t)); portp = stl_getport(stl_comstats.brd, stl_comstats.panel, stl_comstats.port); if (portp == (stlport_t *) NULL) return(-ENODEV); } memset(&portp->stats, 0, sizeof(comstats_t)); portp->stats.brd = portp->brdnr; portp->stats.panel = portp->panelnr; portp->stats.port = portp->portnr; memcpy_tofs(cp, &portp->stats, sizeof(comstats_t)); return(0); } /*****************************************************************************/ /* * Return the entire driver ports structure to a user app. */ static int stl_getportstruct(unsigned long arg) { stlport_t *portp; memcpy_fromfs(&stl_dummyport, (void *) arg, sizeof(stlport_t)); portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, stl_dummyport.portnr); if (portp == (stlport_t *) NULL) return(-ENODEV); memcpy_tofs((void *) arg, portp, sizeof(stlport_t)); return(0); } /*****************************************************************************/ /* * Return the entire driver board structure to a user app. */ static int stl_getbrdstruct(unsigned long arg) { stlbrd_t *brdp; memcpy_fromfs(&stl_dummybrd, (void *) arg, sizeof(stlbrd_t)); if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) return(-ENODEV); brdp = stl_brds[stl_dummybrd.brdnr]; if (brdp == (stlbrd_t *) NULL) return(-ENODEV); memcpy_tofs((void *) arg, brdp, sizeof(stlbrd_t)); return(0); } /*****************************************************************************/ /* * Memory device open code. Need to keep track of opens and close * for module handling. */ static int stl_memopen(struct inode *ip, struct file *fp) { MOD_INC_USE_COUNT; return(0); } /*****************************************************************************/ static void stl_memclose(struct inode *ip, struct file *fp) { MOD_DEC_USE_COUNT; } /*****************************************************************************/ /* * The "staliomem" device is also required to do some special operations * on the board and/or ports. In this driver it is mostly used for stats * collection. */ static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) { int brdnr, rc; #if DEBUG printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, (int) fp, cmd, (int) arg); #endif brdnr = MINOR(ip->i_rdev); if (brdnr >= STL_MAXBRDS) return(-ENODEV); rc = 0; switch (cmd) { case COM_GETPORTSTATS: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0) rc = stl_getportstats((stlport_t *) NULL, (comstats_t *) arg); break; case COM_CLRPORTSTATS: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0) rc = stl_clrportstats((stlport_t *) NULL, (comstats_t *) arg); break; case COM_GETBRDSTATS: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(combrd_t))) == 0) rc = stl_getbrdstats((combrd_t *) arg); break; case COM_READPORT: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(stlport_t))) == 0) rc = stl_getportstruct(arg); break; case COM_READBOARD: if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(stlbrd_t))) == 0) rc = stl_getbrdstruct(arg); break; default: rc = -ENOIOCTLCMD; break; } return(rc); } /*****************************************************************************/ int stl_init(void) { printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); stl_initbrds(); /* * Allocate a temporary write buffer. */ stl_tmpwritebuf = (char *) stl_memalloc(STL_TXBUFSIZE); if (stl_tmpwritebuf == (char *) NULL) printk("STALLION: failed to allocate memory (size=%d)\n", STL_TXBUFSIZE); /* * Set up a character driver for per board stuff. This is mainly used * to do stats ioctls on the ports. */ if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) printk("STALLION: failed to register serial board device\n"); /* * Set up the tty driver structure and register us as a driver. * Also setup the callout tty device. */ memset(&stl_serial, 0, sizeof(struct tty_driver)); stl_serial.magic = TTY_DRIVER_MAGIC; stl_serial.name = stl_serialname; stl_serial.major = STL_SERIALMAJOR; stl_serial.minor_start = 0; stl_serial.num = STL_MAXBRDS * STL_MAXPORTS; stl_serial.type = TTY_DRIVER_TYPE_SERIAL; stl_serial.subtype = STL_DRVTYPSERIAL; stl_serial.init_termios = stl_deftermios; stl_serial.flags = TTY_DRIVER_REAL_RAW; stl_serial.refcount = &stl_refcount; stl_serial.table = stl_ttys; stl_serial.termios = stl_termios; stl_serial.termios_locked = stl_termioslocked; stl_serial.open = stl_open; stl_serial.close = stl_close; stl_serial.write = stl_write; stl_serial.put_char = stl_putchar; stl_serial.flush_chars = stl_flushchars; stl_serial.write_room = stl_writeroom; stl_serial.chars_in_buffer = stl_charsinbuffer; stl_serial.ioctl = stl_ioctl; stl_serial.set_termios = stl_settermios; stl_serial.throttle = stl_throttle; stl_serial.unthrottle = stl_unthrottle; stl_serial.stop = stl_stop; stl_serial.start = stl_start; stl_serial.hangup = stl_hangup; stl_serial.flush_buffer = stl_flushbuffer; stl_callout = stl_serial; stl_callout.name = stl_calloutname; stl_callout.major = STL_CALLOUTMAJOR; stl_callout.subtype = STL_DRVTYPCALLOUT; if (tty_register_driver(&stl_serial)) printk("STALLION: failed to register serial driver\n"); if (tty_register_driver(&stl_callout)) printk("STALLION: failed to register callout driver\n"); return(0); } /*****************************************************************************/ /* CD1400 HARDWARE FUNCTIONS */ /*****************************************************************************/ /* * These functions get/set/update the registers of the cd1400 UARTs. * Access to the cd1400 registers is via an address/data io port pair. * (Maybe should make this inline...) */ static int stl_cd1400getreg(stlport_t *portp, int regnr) { outb((regnr + portp->uartaddr), portp->ioaddr); return(inb(portp->ioaddr + EREG_DATA)); } static void stl_cd1400setreg(stlport_t *portp, int regnr, int value) { outb((regnr + portp->uartaddr), portp->ioaddr); outb(value, portp->ioaddr + EREG_DATA); } static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value) { outb((regnr + portp->uartaddr), portp->ioaddr); if (inb(portp->ioaddr + EREG_DATA) != value) { outb(value, portp->ioaddr + EREG_DATA); return(1); } return(0); } /*****************************************************************************/ /* * Inbitialize the UARTs in a panel. We don't care what sort of board * these ports are on - since the port io registers are almost * identical when dealing with ports. */ static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp) { unsigned int gfrcr; int chipmask, i, j; int nrchips, uartaddr, ioaddr; #if DEBUG printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); #endif BRDENABLE(panelp->brdnr, panelp->pagenr); /* * Check that each chip is present and started up OK. */ chipmask = 0; nrchips = panelp->nrports / CD1400_PORTS; for (i = 0; (i < nrchips); i++) { if (brdp->brdtype == BRD_ECHPCI) { outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); ioaddr = panelp->iobase; } else { ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); } uartaddr = (i & 0x01) ? 0x080 : 0; outb((GFRCR + uartaddr), ioaddr); outb(0, (ioaddr + EREG_DATA)); outb((CCR + uartaddr), ioaddr); outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); outb((GFRCR + uartaddr), ioaddr); for (j = 0; (j < CCR_MAXWAIT); j++) { if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) break; } if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { printk("STALLION: cd1400 not responding, " "brd=%d panel=%d chip=%d\n", panelp->brdnr, panelp->panelnr, i); continue; } chipmask |= (0x1 << i); outb((PPR + uartaddr), ioaddr); outb(PPR_SCALAR, (ioaddr + EREG_DATA)); } BRDDISABLE(panelp->brdnr); return(chipmask); } /*****************************************************************************/ /* * Initialize hardware specific port registers. */ static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) { #if DEBUG printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n", (int) brdp, (int) panelp, (int) portp); #endif if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || (portp == (stlport_t *) NULL)) return; portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); portp->uartaddr = (portp->portnr & 0x04) << 5; portp->pagenr = panelp->pagenr + (portp->portnr >> 3); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); portp->hwid = stl_cd1400getreg(portp, GFRCR); BRDDISABLE(portp->brdnr); } /*****************************************************************************/ /* * Wait for the command register to be ready. We will poll this, * since it won't usually take too long to be ready. */ static void stl_cd1400ccrwait(stlport_t *portp) { int i; for (i = 0; (i < CCR_MAXWAIT); i++) { if (stl_cd1400getreg(portp, CCR) == 0) { return; } } printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", portp->portnr, portp->panelnr, portp->brdnr); } /*****************************************************************************/ /* * Set up the cd1400 registers for a port based on the termios port * settings. */ static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp) { stlbrd_t *brdp; unsigned long flags; unsigned int clkdiv, baudrate; unsigned char cor1, cor2, cor3; unsigned char cor4, cor5, ccr; unsigned char srer, sreron, sreroff; unsigned char mcor1, mcor2, rtpr; unsigned char clk, div; cor1 = 0; cor2 = 0; cor3 = 0; cor4 = 0; cor5 = 0; ccr = 0; rtpr = 0; clk = 0; div = 0; mcor1 = 0; mcor2 = 0; sreron = 0; sreroff = 0; brdp = stl_brds[portp->brdnr]; if (brdp == (stlbrd_t *) NULL) return; /* * Set up the RX char ignore mask with those RX error types we * can ignore. We can get the cd1400 to help us out a little here, * it will ignore parity errors and breaks for us. */ portp->rxignoremsk = 0; if (tiosp->c_iflag & IGNPAR) { portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); cor1 |= COR1_PARIGNORE; } if (tiosp->c_iflag & IGNBRK) { portp->rxignoremsk |= ST_BREAK; cor4 |= COR4_IGNBRK; } portp->rxmarkmsk = ST_OVERRUN; if (tiosp->c_iflag & (INPCK | PARMRK)) portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); if (tiosp->c_iflag & BRKINT) portp->rxmarkmsk |= ST_BREAK; /* * Go through the char size, parity and stop bits and set all the * option register appropriately. */ switch (tiosp->c_cflag & CSIZE) { case CS5: cor1 |= COR1_CHL5; break; case CS6: cor1 |= COR1_CHL6; break; case CS7: cor1 |= COR1_CHL7; break; default: cor1 |= COR1_CHL8; break; } if (tiosp->c_cflag & CSTOPB) cor1 |= COR1_STOP2; else cor1 |= COR1_STOP1; if (tiosp->c_cflag & PARENB) { if (tiosp->c_cflag & PARODD) cor1 |= (COR1_PARENB | COR1_PARODD); else cor1 |= (COR1_PARENB | COR1_PAREVEN); } else { cor1 |= COR1_PARNONE; } /* * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing * space for hardware flow control and the like. This should be set to * VMIN. Also here we will set the RX data timeout to 10ms - this should * really be based on VTIME. */ cor3 |= FIFO_RXTHRESHOLD; rtpr = 2; /* * Calculate the baud rate timers. For now we will just assume that * the input and output baud are the same. Could have used a baud * table here, but this way we can generate virtually any baud rate * we like! */ baudrate = tiosp->c_cflag & CBAUD; if (baudrate & CBAUDEX) { baudrate &= ~CBAUDEX; if ((baudrate < 1) || (baudrate > 2)) tiosp->c_cflag &= ~CBAUDEX; else baudrate += 15; } baudrate = stl_baudrates[baudrate]; if ((tiosp->c_cflag & CBAUD) == B38400) { if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) baudrate = 57600; else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) baudrate = 115200; else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) baudrate = (portp->baud_base / portp->custom_divisor); } if (baudrate > STL_CD1400MAXBAUD) baudrate = STL_CD1400MAXBAUD; if (baudrate > 0) { for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); if (clkdiv < 0x100) break; } div = (unsigned char) clkdiv; } /* * Check what form of modem signaling is required and set it up. */ if ((tiosp->c_cflag & CLOCAL) == 0) { mcor1 |= MCOR1_DCD; mcor2 |= MCOR2_DCD; sreron |= SRER_MODEM; portp->flags |= ASYNC_CHECK_CD; } else { portp->flags &= ~ASYNC_CHECK_CD; } /* * Setup cd1400 enhanced modes if we can. In particular we want to * handle as much of the flow control as possible automatically. As * well as saving a few CPU cycles it will also greatly improve flow * control reliability. */ if (tiosp->c_iflag & IXON) { cor2 |= COR2_TXIBE; cor3 |= COR3_SCD12; if (tiosp->c_iflag & IXANY) cor2 |= COR2_IXM; } if (tiosp->c_cflag & CRTSCTS) { cor2 |= COR2_CTSAE; mcor1 |= FIFO_RTSTHRESHOLD; } /* * All cd1400 register values calculated so go through and set * them all up. */ #if DEBUG printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", portp->portnr, portp->panelnr, portp->brdnr); printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", cor1, cor2, cor3, cor4, cor5); printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", mcor1, mcor2, rtpr, sreron, sreroff); printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); #endif save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); srer = stl_cd1400getreg(portp, SRER); stl_cd1400setreg(portp, SRER, 0); if (stl_cd1400updatereg(portp, COR1, cor1)) ccr = 1; if (stl_cd1400updatereg(portp, COR2, cor2)) ccr = 1; if (stl_cd1400updatereg(portp, COR3, cor3)) ccr = 1; if (ccr) { stl_cd1400ccrwait(portp); stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); } stl_cd1400setreg(portp, COR4, cor4); stl_cd1400setreg(portp, COR5, cor5); stl_cd1400setreg(portp, MCOR1, mcor1); stl_cd1400setreg(portp, MCOR2, mcor2); if (baudrate > 0) { stl_cd1400setreg(portp, TCOR, clk); stl_cd1400setreg(portp, TBPR, div); stl_cd1400setreg(portp, RCOR, clk); stl_cd1400setreg(portp, RBPR, div); } stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); stl_cd1400setreg(portp, RTPR, rtpr); mcor1 = stl_cd1400getreg(portp, MSVR1); if (mcor1 & MSVR1_DCD) portp->sigs |= TIOCM_CD; else portp->sigs &= ~TIOCM_CD; stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Set the state of the DTR and RTS signals. */ static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts) { unsigned char msvr1, msvr2; unsigned long flags; #if DEBUG printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n", (int) portp, dtr, rts); #endif msvr1 = 0; msvr2 = 0; if (dtr > 0) msvr1 = MSVR1_DTR; if (rts > 0) msvr2 = MSVR2_RTS; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); if (rts >= 0) stl_cd1400setreg(portp, MSVR2, msvr2); if (dtr >= 0) stl_cd1400setreg(portp, MSVR1, msvr1); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Return the state of the signals. */ static int stl_cd1400getsignals(stlport_t *portp) { unsigned char msvr1, msvr2; unsigned long flags; int sigs; #if DEBUG printk("stl_cd1400getsignals(portp=%x)\n", (int) portp); #endif save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); msvr1 = stl_cd1400getreg(portp, MSVR1); msvr2 = stl_cd1400getreg(portp, MSVR2); BRDDISABLE(portp->brdnr); restore_flags(flags); sigs = 0; sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; #if 0 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; #else sigs |= TIOCM_DSR; #endif return(sigs); } /*****************************************************************************/ /* * Enable/Disable the Transmitter and/or Receiver. */ static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx) { unsigned char ccr; unsigned long flags; #if DEBUG printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx); #endif ccr = 0; if (tx == 0) ccr |= CCR_TXDISABLE; else if (tx > 0) ccr |= CCR_TXENABLE; if (rx == 0) ccr |= CCR_RXDISABLE; else if (rx > 0) ccr |= CCR_RXENABLE; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); stl_cd1400ccrwait(portp); stl_cd1400setreg(portp, CCR, ccr); stl_cd1400ccrwait(portp); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Start/stop the Transmitter and/or Receiver. */ static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx) { unsigned char sreron, sreroff; unsigned long flags; #if DEBUG printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx); #endif sreron = 0; sreroff = 0; if (tx == 0) sreroff |= (SRER_TXDATA | SRER_TXEMPTY); else if (tx == 1) sreron |= SRER_TXDATA; else if (tx >= 2) sreron |= SRER_TXEMPTY; if (rx == 0) sreroff |= SRER_RXDATA; else if (rx > 0) sreron |= SRER_RXDATA; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); stl_cd1400setreg(portp, SRER, ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); BRDDISABLE(portp->brdnr); if (tx > 0) set_bit(ASYI_TXBUSY, &portp->istate); restore_flags(flags); } /*****************************************************************************/ /* * Disable all interrupts from this port. */ static void stl_cd1400disableintrs(stlport_t *portp) { unsigned long flags; #if DEBUG printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp); #endif save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); stl_cd1400setreg(portp, SRER, 0); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ static void stl_cd1400sendbreak(stlport_t *portp, long len) { unsigned long flags; #if DEBUG printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, (int) len); #endif save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); stl_cd1400setreg(portp, COR2, (stl_cd1400getreg(portp, COR2) | COR2_ETC)); stl_cd1400setreg(portp, SRER, ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | SRER_TXEMPTY)); BRDDISABLE(portp->brdnr); len = len / 5; portp->brklen = (len > 255) ? 255 : len; portp->stats.txbreaks++; restore_flags(flags); } /*****************************************************************************/ /* * Take flow control actions... */ static void stl_cd1400flowctrl(stlport_t *portp, int state) { struct tty_struct *tty; unsigned long flags; #if DEBUG printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state); #endif if (portp == (stlport_t *) NULL) return; tty = portp->tty; if (tty == (struct tty_struct *) NULL) return; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); if (state) { if (tty->termios->c_iflag & IXOFF) { stl_cd1400ccrwait(portp); stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); portp->stats.rxxon++; stl_cd1400ccrwait(portp); } /* * Question: should we return RTS to what it was before? It may * have been set by an ioctl... Suppose not, since if you have * hardware flow control set then it is pretty silly to go and * set the RTS line by hand. */ if (tty->termios->c_cflag & CRTSCTS) { stl_cd1400setreg(portp, MCOR1, (stl_cd1400getreg(portp, MCOR1) | FIFO_RTSTHRESHOLD)); stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); portp->stats.rxrtson++; } } else { if (tty->termios->c_iflag & IXOFF) { stl_cd1400ccrwait(portp); stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); portp->stats.rxxoff++; stl_cd1400ccrwait(portp); } if (tty->termios->c_cflag & CRTSCTS) { stl_cd1400setreg(portp, MCOR1, (stl_cd1400getreg(portp, MCOR1) & 0xf0)); stl_cd1400setreg(portp, MSVR2, 0); portp->stats.rxrtsoff++; } } BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Send a flow control character... */ static void stl_cd1400sendflow(stlport_t *portp, int state) { struct tty_struct *tty; unsigned long flags; #if DEBUG printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state); #endif if (portp == (stlport_t *) NULL) return; tty = portp->tty; if (tty == (struct tty_struct *) NULL) return; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); if (state) { stl_cd1400ccrwait(portp); stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); portp->stats.rxxon++; stl_cd1400ccrwait(portp); } else { stl_cd1400ccrwait(portp); stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); portp->stats.rxxoff++; stl_cd1400ccrwait(portp); } BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ static void stl_cd1400flush(stlport_t *portp) { unsigned long flags; #if DEBUG printk("stl_cd1400flush(portp=%x)\n", (int) portp); #endif if (portp == (stlport_t *) NULL) return; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); stl_cd1400ccrwait(portp); stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); stl_cd1400ccrwait(portp); portp->tx.tail = portp->tx.head; BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Return the current state of data flow on this port. This is only * really interresting when determining if data has fully completed * transmission or not... This is easy for the cd1400, it accurately * maintains the busy port flag. */ static int stl_cd1400datastate(stlport_t *portp) { #if DEBUG printk("stl_cd1400datastate(portp=%x)\n", (int) portp); #endif if (portp == (stlport_t *) NULL) return(0); return(test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0); } /*****************************************************************************/ /* * Interrupt service routine for cd1400 EasyIO boards. */ static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase) { unsigned char svrtype; #if DEBUG printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n", (int) panelp, iobase); #endif outb(SVRR, iobase); svrtype = inb(iobase + EREG_DATA); if (panelp->nrports > 4) { outb((SVRR + 0x80), iobase); svrtype |= inb(iobase + EREG_DATA); } if (svrtype & SVRR_RX) stl_cd1400rxisr(panelp, iobase); else if (svrtype & SVRR_TX) stl_cd1400txisr(panelp, iobase); else if (svrtype & SVRR_MDM) stl_cd1400mdmisr(panelp, iobase); } /*****************************************************************************/ /* * Interrupt service routine for cd1400 panels. */ static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase) { unsigned char svrtype; #if DEBUG printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp, iobase); #endif outb(SVRR, iobase); svrtype = inb(iobase + EREG_DATA); outb((SVRR + 0x80), iobase); svrtype |= inb(iobase + EREG_DATA); if (svrtype & SVRR_RX) stl_cd1400rxisr(panelp, iobase); else if (svrtype & SVRR_TX) stl_cd1400txisr(panelp, iobase); else if (svrtype & SVRR_MDM) stl_cd1400mdmisr(panelp, iobase); } /*****************************************************************************/ /* * Transmit interrupt handler. This has gotta be fast! Handling TX * chars is pretty simple, stuff as many as possible from the TX buffer * into the cd1400 FIFO. Must also handle TX breaks here, since they * are embedded as commands in the data stream. Oh no, had to use a goto! * This could be optimized more, will do when I get time... * In practice it is possible that interrupts are enabled but that the * port has been hung up. Need to handle not having any TX buffer here, * this is done by using the side effect that head and tail will also * be NULL if the buffer has been freed. */ static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr) { stlport_t *portp; int len, stlen; char *head, *tail; unsigned char ioack, srer; #if DEBUG printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); #endif ioack = inb(ioaddr + EREG_TXACK); if (((ioack & panelp->ackmask) != 0) || ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { printk("STALLION: bad TX interrupt ack value=%x\n", ioack); return; } portp = panelp->ports[(ioack >> 3)]; /* * Unfortunately we need to handle breaks in the data stream, since * this is the only way to generate them on the cd1400. Do it now if * a break is to be sent. */ if (portp->brklen != 0) { if (portp->brklen > 0) { outb((TDR + portp->uartaddr), ioaddr); outb(ETC_CMD, (ioaddr + EREG_DATA)); outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); outb(ETC_CMD, (ioaddr + EREG_DATA)); outb(ETC_DELAY, (ioaddr + EREG_DATA)); outb(portp->brklen, (ioaddr + EREG_DATA)); outb(ETC_CMD, (ioaddr + EREG_DATA)); outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); portp->brklen = -1; goto stl_txalldone; } else { outb((COR2 + portp->uartaddr), ioaddr); outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), (ioaddr + EREG_DATA)); portp->brklen = 0; } } head = portp->tx.head; tail = portp->tx.tail; len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); if ((len == 0) || ((len < STL_TXBUFLOW) && (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { set_bit(ASYI_TXLOW, &portp->istate); queue_task_irq_off(&portp->tqueue, &tq_scheduler); } if (len == 0) { outb((SRER + portp->uartaddr), ioaddr); srer = inb(ioaddr + EREG_DATA); if (srer & SRER_TXDATA) { srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; } else { srer &= ~(SRER_TXDATA | SRER_TXEMPTY); clear_bit(ASYI_TXBUSY, &portp->istate); } outb(srer, (ioaddr + EREG_DATA)); } else { len = MIN(len, CD1400_TXFIFOSIZE); portp->stats.txtotal += len; stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); outb((TDR + portp->uartaddr), ioaddr); outsb((ioaddr + EREG_DATA), tail, stlen); len -= stlen; tail += stlen; if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) tail = portp->tx.buf; if (len > 0) { outsb((ioaddr + EREG_DATA), tail, len); tail += len; } portp->tx.tail = tail; } stl_txalldone: outb((EOSRR + portp->uartaddr), ioaddr); outb(0, (ioaddr + EREG_DATA)); } /*****************************************************************************/ /* * Receive character interrupt handler. Determine if we have good chars * or bad chars and then process appropriately. Good chars are easy * just shove the lot into the RX buffer and set all status byte to 0. * If a bad RX char then process as required. This routine needs to be * fast! In practice it is possible that we get an interrupt on a port * that is closed. This can happen on hangups - since they completely * shutdown a port not in user context. Need to handle this case. */ static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr) { stlport_t *portp; struct tty_struct *tty; unsigned int ioack, len, buflen; unsigned char status; char ch; #if DEBUG printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); #endif ioack = inb(ioaddr + EREG_RXACK); if ((ioack & panelp->ackmask) != 0) { printk("STALLION: bad RX interrupt ack value=%x\n", ioack); return; } portp = panelp->ports[(ioack >> 3)]; tty = portp->tty; if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { outb((RDCR + portp->uartaddr), ioaddr); len = inb(ioaddr + EREG_DATA); if ((tty == (struct tty_struct *) NULL) || (tty->flip.char_buf_ptr == (char *) NULL) || ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) { outb((RDSR + portp->uartaddr), ioaddr); insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); portp->stats.rxlost += len; portp->stats.rxtotal += len; } else { len = MIN(len, buflen); if (len > 0) { outb((RDSR + portp->uartaddr), ioaddr); insb((ioaddr + EREG_DATA), tty->flip.char_buf_ptr, len); memset(tty->flip.flag_buf_ptr, 0, len); tty->flip.flag_buf_ptr += len; tty->flip.char_buf_ptr += len; tty->flip.count += len; tty_schedule_flip(tty); portp->stats.rxtotal += len; } } } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { outb((RDSR + portp->uartaddr), ioaddr); status = inb(ioaddr + EREG_DATA); ch = inb(ioaddr + EREG_DATA); if (status & ST_PARITY) portp->stats.rxparity++; if (status & ST_FRAMING) portp->stats.rxframing++; if (status & ST_OVERRUN) portp->stats.rxoverrun++; if (status & ST_BREAK) portp->stats.rxbreaks++; if (status & ST_SCHARMASK) { if ((status & ST_SCHARMASK) == ST_SCHAR1) portp->stats.txxon++; if ((status & ST_SCHARMASK) == ST_SCHAR2) portp->stats.txxoff++; goto stl_rxalldone; } if ((tty != (struct tty_struct *) NULL) && ((portp->rxignoremsk & status) == 0)) { if (portp->rxmarkmsk & status) { if (status & ST_BREAK) { status = TTY_BREAK; if (portp->flags & ASYNC_SAK) { do_SAK(tty); BRDENABLE(portp->brdnr, portp->pagenr); } } else if (status & ST_PARITY) { status = TTY_PARITY; } else if (status & ST_FRAMING) { status = TTY_FRAME; } else if(status & ST_OVERRUN) { status = TTY_OVERRUN; } else { status = 0; } } else { status = 0; } if (tty->flip.char_buf_ptr != (char *) NULL) { if (tty->flip.count < TTY_FLIPBUF_SIZE) { *tty->flip.flag_buf_ptr++ = status; *tty->flip.char_buf_ptr++ = ch; tty->flip.count++; } tty_schedule_flip(tty); } } } else { printk("STALLION: bad RX interrupt ack value=%x\n", ioack); return; } stl_rxalldone: outb((EOSRR + portp->uartaddr), ioaddr); outb(0, (ioaddr + EREG_DATA)); } /*****************************************************************************/ /* * Modem interrupt handler. The is called when the modem signal line * (DCD) has changed state. Leave most of the work to the off-level * processing routine. */ static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr) { stlport_t *portp; unsigned int ioack; unsigned char misr; #if DEBUG printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp); #endif ioack = inb(ioaddr + EREG_MDACK); if (((ioack & panelp->ackmask) != 0) || ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); return; } portp = panelp->ports[(ioack >> 3)]; outb((MISR + portp->uartaddr), ioaddr); misr = inb(ioaddr + EREG_DATA); if (misr & MISR_DCD) { set_bit(ASYI_DCDCHANGE, &portp->istate); queue_task_irq_off(&portp->tqueue, &tq_scheduler); portp->stats.modem++; } outb((EOSRR + portp->uartaddr), ioaddr); outb(0, (ioaddr + EREG_DATA)); } /*****************************************************************************/ /* SC26198 HARDWARE FUNCTIONS */ /*****************************************************************************/ /* * These functions get/set/update the registers of the sc26198 UARTs. * Access to the sc26198 registers is via an address/data io port pair. * (Maybe should make this inline...) */ static int stl_sc26198getreg(stlport_t *portp, int regnr) { outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); return(inb(portp->ioaddr + XP_DATA)); } static void stl_sc26198setreg(stlport_t *portp, int regnr, int value) { outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); outb(value, (portp->ioaddr + XP_DATA)); } static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value) { outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); if (inb(portp->ioaddr + XP_DATA) != value) { outb(value, (portp->ioaddr + XP_DATA)); return(1); } return(0); } /*****************************************************************************/ /* * Functions to get and set the sc26198 global registers. */ static int stl_sc26198getglobreg(stlport_t *portp, int regnr) { outb(regnr, (portp->ioaddr + XP_ADDR)); return(inb(portp->ioaddr + XP_DATA)); } #if 0 static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value) { outb(regnr, (portp->ioaddr + XP_ADDR)); outb(value, (portp->ioaddr + XP_DATA)); } #endif /*****************************************************************************/ /* * Inbitialize the UARTs in a panel. We don't care what sort of board * these ports are on - since the port io registers are almost * identical when dealing with ports. */ static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp) { int chipmask, i; int nrchips, ioaddr; #if DEBUG printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); #endif BRDENABLE(panelp->brdnr, panelp->pagenr); /* * Check that each chip is present and started up OK. */ chipmask = 0; nrchips = (panelp->nrports + 4) / SC26198_PORTS; if (brdp->brdtype == BRD_ECHPCI) outb(panelp->pagenr, brdp->ioctrl); for (i = 0; (i < nrchips); i++) { ioaddr = panelp->iobase + (i * 4); outb(SCCR, (ioaddr + XP_ADDR)); outb(CR_RESETALL, (ioaddr + XP_DATA)); outb(TSTR, (ioaddr + XP_ADDR)); if (inb(ioaddr + XP_DATA) != 0) { printk("STALLION: sc26198 not responding, " "brd=%d panel=%d chip=%d\n", panelp->brdnr, panelp->panelnr, i); continue; } chipmask |= (0x1 << i); outb(GCCR, (ioaddr + XP_ADDR)); outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); outb(WDTRCR, (ioaddr + XP_ADDR)); outb(0xff, (ioaddr + XP_DATA)); } BRDDISABLE(panelp->brdnr); return(chipmask); } /*****************************************************************************/ /* * Initialize hardware specific port registers. */ static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) { #if DEBUG printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n", (int) brdp, (int) panelp, (int) portp); #endif if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || (portp == (stlport_t *) NULL)) return; portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); portp->uartaddr = (portp->portnr & 0x07) << 4; portp->pagenr = panelp->pagenr; portp->hwid = 0x1; BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); BRDDISABLE(portp->brdnr); } /*****************************************************************************/ /* * Set up the sc26198 registers for a port based on the termios port * settings. */ static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp) { stlbrd_t *brdp; unsigned long flags; unsigned int baudrate; unsigned char mr0, mr1, mr2, clk; unsigned char imron, imroff, iopr, ipr; mr0 = 0; mr1 = 0; mr2 = 0; clk = 0; iopr = 0; imron = 0; imroff = 0; brdp = stl_brds[portp->brdnr]; if (brdp == (stlbrd_t *) NULL) return; /* * Set up the RX char ignore mask with those RX error types we * can ignore. */ portp->rxignoremsk = 0; if (tiosp->c_iflag & IGNPAR) portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | SR_RXOVERRUN); if (tiosp->c_iflag & IGNBRK) portp->rxignoremsk |= SR_RXBREAK; portp->rxmarkmsk = SR_RXOVERRUN; if (tiosp->c_iflag & (INPCK | PARMRK)) portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); if (tiosp->c_iflag & BRKINT) portp->rxmarkmsk |= SR_RXBREAK; /* * Go through the char size, parity and stop bits and set all the * option register appropriately. */ switch (tiosp->c_cflag & CSIZE) { case CS5: mr1 |= MR1_CS5; break; case CS6: mr1 |= MR1_CS6; break; case CS7: mr1 |= MR1_CS7; break; default: mr1 |= MR1_CS8; break; } if (tiosp->c_cflag & CSTOPB) mr2 |= MR2_STOP2; else mr2 |= MR2_STOP1; if (tiosp->c_cflag & PARENB) { if (tiosp->c_cflag & PARODD) mr1 |= (MR1_PARENB | MR1_PARODD); else mr1 |= (MR1_PARENB | MR1_PAREVEN); } else { mr1 |= MR1_PARNONE; } mr1 |= MR1_ERRBLOCK; /* * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing * space for hardware flow control and the like. This should be set to * VMIN. */ mr2 |= MR2_RXFIFOHALF; /* * Calculate the baud rate timers. For now we will just assume that * the input and output baud are the same. The sc26198 has a fixed * baud rate table, so only discrete baud rates possible. */ baudrate = tiosp->c_cflag & CBAUD; if (baudrate & CBAUDEX) { baudrate &= ~CBAUDEX; if ((baudrate < 1) || (baudrate > 5)) tiosp->c_cflag &= ~CBAUDEX; else baudrate += 15; } baudrate = stl_baudrates[baudrate]; if ((tiosp->c_cflag & CBAUD) == B38400) { if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) baudrate = 57600; else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) baudrate = 115200; else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) baudrate = (portp->baud_base / portp->custom_divisor); } if (baudrate > STL_SC26198MAXBAUD) baudrate = STL_SC26198MAXBAUD; if (baudrate > 0) { for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { if (baudrate <= sc26198_baudtable[clk]) break; } } /* * Check what form of modem signaling is required and set it up. */ if (tiosp->c_cflag & CLOCAL) { portp->flags &= ~ASYNC_CHECK_CD; } else { iopr |= IOPR_DCDCOS; imron |= IR_IOPORT; portp->flags |= ASYNC_CHECK_CD; } /* * Setup sc26198 enhanced modes if we can. In particular we want to * handle as much of the flow control as possible automatically. As * well as saving a few CPU cycles it will also greatly improve flow * control reliability. */ if (tiosp->c_iflag & IXON) { mr0 |= MR0_SWFTX | MR0_SWFT; imron |= IR_XONXOFF; } else { imroff |= IR_XONXOFF; } if (tiosp->c_iflag & IXOFF) mr0 |= MR0_SWFRX; if (tiosp->c_cflag & CRTSCTS) { mr2 |= MR2_AUTOCTS; mr1 |= MR1_AUTORTS; } /* * All sc26198 register values calculated so go through and set * them all up. */ #if DEBUG printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", portp->portnr, portp->panelnr, portp->brdnr); printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); #endif save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, IMR, 0); stl_sc26198updatereg(portp, MR0, mr0); stl_sc26198updatereg(portp, MR1, mr1); stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); stl_sc26198updatereg(portp, MR2, mr2); stl_sc26198updatereg(portp, IOPIOR, ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); if (baudrate > 0) { stl_sc26198setreg(portp, TXCSR, clk); stl_sc26198setreg(portp, RXCSR, clk); } stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); ipr = stl_sc26198getreg(portp, IPR); if (ipr & IPR_DCD) portp->sigs &= ~TIOCM_CD; else portp->sigs |= TIOCM_CD; portp->imr = (portp->imr & ~imroff) | imron; stl_sc26198setreg(portp, IMR, portp->imr); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Set the state of the DTR and RTS signals. */ static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts) { unsigned char iopioron, iopioroff; unsigned long flags; #if DEBUG printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n", (int) portp, dtr, rts); #endif iopioron = 0; iopioroff = 0; if (dtr == 0) iopioroff |= IPR_DTR; else if (dtr > 0) iopioron |= IPR_DTR; if (rts == 0) iopioroff |= IPR_RTS; else if (rts > 0) iopioron |= IPR_RTS; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, IOPIOR, ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Return the state of the signals. */ static int stl_sc26198getsignals(stlport_t *portp) { unsigned char ipr; unsigned long flags; int sigs; #if DEBUG printk("stl_sc26198getsignals(portp=%x)\n", (int) portp); #endif save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); ipr = stl_sc26198getreg(portp, IPR); BRDDISABLE(portp->brdnr); restore_flags(flags); sigs = 0; sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; sigs |= TIOCM_DSR; return(sigs); } /*****************************************************************************/ /* * Enable/Disable the Transmitter and/or Receiver. */ static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx) { unsigned char ccr; unsigned long flags; #if DEBUG printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx); #endif ccr = portp->crenable; if (tx == 0) ccr &= ~CR_TXENABLE; else if (tx > 0) ccr |= CR_TXENABLE; if (rx == 0) ccr &= ~CR_RXENABLE; else if (rx > 0) ccr |= CR_RXENABLE; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, SCCR, ccr); BRDDISABLE(portp->brdnr); portp->crenable = ccr; restore_flags(flags); } /*****************************************************************************/ /* * Start/stop the Transmitter and/or Receiver. */ static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx) { unsigned char imr; unsigned long flags; #if DEBUG printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx); #endif imr = portp->imr; if (tx == 0) imr &= ~IR_TXRDY; else if (tx == 1) imr |= IR_TXRDY; if (rx == 0) imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); else if (rx > 0) imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, IMR, imr); BRDDISABLE(portp->brdnr); portp->imr = imr; if (tx > 0) set_bit(ASYI_TXBUSY, &portp->istate); restore_flags(flags); } /*****************************************************************************/ /* * Disable all interrupts from this port. */ static void stl_sc26198disableintrs(stlport_t *portp) { unsigned long flags; #if DEBUG printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp); #endif save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); portp->imr = 0; stl_sc26198setreg(portp, IMR, 0); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ static void stl_sc26198sendbreak(stlport_t *portp, long len) { unsigned long flags; #if DEBUG printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, (int) len); #endif current->state = TASK_INTERRUPTIBLE; current->timeout = jiffies + (len / (1000 / HZ)); save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); BRDDISABLE(portp->brdnr); portp->stats.txbreaks++; schedule(); BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Take flow control actions... */ static void stl_sc26198flowctrl(stlport_t *portp, int state) { struct tty_struct *tty; unsigned long flags; unsigned char mr0; #if DEBUG printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state); #endif if (portp == (stlport_t *) NULL) return; tty = portp->tty; if (tty == (struct tty_struct *) NULL) return; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); if (state) { if (tty->termios->c_iflag & IXOFF) { mr0 = stl_sc26198getreg(portp, MR0); stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); mr0 |= MR0_SWFRX; portp->stats.rxxon++; stl_sc26198wait(portp); stl_sc26198setreg(portp, MR0, mr0); } /* * Question: should we return RTS to what it was before? It may * have been set by an ioctl... Suppose not, since if you have * hardware flow control set then it is pretty silly to go and * set the RTS line by hand. */ if (tty->termios->c_cflag & CRTSCTS) { stl_sc26198setreg(portp, MR1, (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); stl_sc26198setreg(portp, IOPIOR, (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); portp->stats.rxrtson++; } } else { if (tty->termios->c_iflag & IXOFF) { mr0 = stl_sc26198getreg(portp, MR0); stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); mr0 &= ~MR0_SWFRX; portp->stats.rxxoff++; stl_sc26198wait(portp); stl_sc26198setreg(portp, MR0, mr0); } if (tty->termios->c_cflag & CRTSCTS) { stl_sc26198setreg(portp, MR1, (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); stl_sc26198setreg(portp, IOPIOR, (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); portp->stats.rxrtsoff++; } } BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ /* * Send a flow control character. */ static void stl_sc26198sendflow(stlport_t *portp, int state) { struct tty_struct *tty; unsigned long flags; unsigned char mr0; #if DEBUG printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state); #endif if (portp == (stlport_t *) NULL) return; tty = portp->tty; if (tty == (struct tty_struct *) NULL) return; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); if (state) { mr0 = stl_sc26198getreg(portp, MR0); stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); mr0 |= MR0_SWFRX; portp->stats.rxxon++; stl_sc26198wait(portp); stl_sc26198setreg(portp, MR0, mr0); } else { mr0 = stl_sc26198getreg(portp, MR0); stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); mr0 &= ~MR0_SWFRX; portp->stats.rxxoff++; stl_sc26198wait(portp); stl_sc26198setreg(portp, MR0, mr0); } BRDDISABLE(portp->brdnr); restore_flags(flags); } /*****************************************************************************/ static void stl_sc26198flush(stlport_t *portp) { unsigned long flags; #if DEBUG printk("stl_sc26198flush(portp=%x)\n", (int) portp); #endif if (portp == (stlport_t *) NULL) return; save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); stl_sc26198setreg(portp, SCCR, CR_TXRESET); stl_sc26198setreg(portp, SCCR, portp->crenable); BRDDISABLE(portp->brdnr); portp->tx.tail = portp->tx.head; restore_flags(flags); } /*****************************************************************************/ /* * Return the current state of data flow on this port. This is only * really interresting when determining if data has fully completed * transmission or not... The sc26198 interrupt scheme cannot * determine when all data has actually drained, so we need to * check the port statusy register to be sure. */ static int stl_sc26198datastate(stlport_t *portp) { unsigned long flags; unsigned char sr; #if DEBUG printk("stl_sc26198datastate(portp=%x)\n", (int) portp); #endif if (portp == (stlport_t *) NULL) return(0); if (test_bit(ASYI_TXBUSY, &portp->istate)) return(1); save_flags(flags); cli(); BRDENABLE(portp->brdnr, portp->pagenr); sr = stl_sc26198getreg(portp, SR); BRDDISABLE(portp->brdnr); restore_flags(flags); return((sr & SR_TXEMPTY) ? 0 : 1); } /*****************************************************************************/ /* * Delay for a small amount of time, to give the sc26198 a chance * to process a command... */ static void stl_sc26198wait(stlport_t *portp) { int i; #if DEBUG printk("stl_sc26198wait(portp=%x)\n", (int) portp); #endif if (portp == (stlport_t *) NULL) return; for (i = 0; (i < 20); i++) stl_sc26198getglobreg(portp, TSTR); } /*****************************************************************************/ /* * If we are TX flow controlled and in IXANY mode then we may * need to unflow control here. We gotta do this because of the * automatic flow control modes of the sc26198. */ static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty) { unsigned char mr0; mr0 = stl_sc26198getreg(portp, MR0); stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); stl_sc26198setreg(portp, SCCR, CR_HOSTXON); stl_sc26198wait(portp); stl_sc26198setreg(portp, MR0, mr0); clear_bit(ASYI_TXFLOWED, &portp->istate); } /*****************************************************************************/ /* * Interrupt service routine for sc26198 panels. */ static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase) { stlport_t *portp; unsigned int iack; /* * Work around bug in sc26198 chip... Cannot have A6 address * line of UART high, else iack will be returned as 0. */ outb(0, (iobase + 1)); iack = inb(iobase + XP_IACK); portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; if (iack & IVR_RXDATA) stl_sc26198rxisr(portp, iack); else if (iack & IVR_TXDATA) stl_sc26198txisr(portp); else stl_sc26198otherisr(portp, iack); } /*****************************************************************************/ /* * Transmit interrupt handler. This has gotta be fast! Handling TX * chars is pretty simple, stuff as many as possible from the TX buffer * into the sc26198 FIFO. * In practice it is possible that interrupts are enabled but that the * port has been hung up. Need to handle not having any TX buffer here, * this is done by using the side effect that head and tail will also * be NULL if the buffer has been freed. */ static void stl_sc26198txisr(stlport_t *portp) { unsigned int ioaddr; unsigned char mr0; int len, stlen; char *head, *tail; #if DEBUG printk("stl_sc26198txisr(portp=%x)\n", (int) portp); #endif ioaddr = portp->ioaddr; head = portp->tx.head; tail = portp->tx.tail; len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); if ((len == 0) || ((len < STL_TXBUFLOW) && (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { set_bit(ASYI_TXLOW, &portp->istate); queue_task_irq_off(&portp->tqueue, &tq_scheduler); } if (len == 0) { outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); mr0 = inb(ioaddr + XP_DATA); if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { portp->imr &= ~IR_TXRDY; outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); outb(portp->imr, (ioaddr + XP_DATA)); clear_bit(ASYI_TXBUSY, &portp->istate); } else { mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); outb(mr0, (ioaddr + XP_DATA)); } } else { len = MIN(len, SC26198_TXFIFOSIZE); portp->stats.txtotal += len; stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); outb(GTXFIFO, (ioaddr + XP_ADDR)); outsb((ioaddr + XP_DATA), tail, stlen); len -= stlen; tail += stlen; if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) tail = portp->tx.buf; if (len > 0) { outsb((ioaddr + XP_DATA), tail, len); tail += len; } portp->tx.tail = tail; } } /*****************************************************************************/ /* * Receive character interrupt handler. Determine if we have good chars * or bad chars and then process appropriately. Good chars are easy * just shove the lot into the RX buffer and set all status byte to 0. * If a bad RX char then process as required. This routine needs to be * fast! In practice it is possible that we get an interrupt on a port * that is closed. This can happen on hangups - since they completely * shutdown a port not in user context. Need to handle this case. */ static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack) { struct tty_struct *tty; unsigned int len, buflen, ioaddr; #if DEBUG printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack); #endif tty = portp->tty; ioaddr = portp->ioaddr; outb(GIBCR, (ioaddr + XP_ADDR)); len = inb(ioaddr + XP_DATA) + 1; if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { if ((tty == (struct tty_struct *) NULL) || (tty->flip.char_buf_ptr == (char *) NULL) || ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) { outb(GRXFIFO, (ioaddr + XP_ADDR)); insb((ioaddr + XP_DATA), &stl_unwanted[0], len); portp->stats.rxlost += len; portp->stats.rxtotal += len; } else { len = MIN(len, buflen); if (len > 0) { outb(GRXFIFO, (ioaddr + XP_ADDR)); insb((ioaddr + XP_DATA), tty->flip.char_buf_ptr, len); memset(tty->flip.flag_buf_ptr, 0, len); tty->flip.flag_buf_ptr += len; tty->flip.char_buf_ptr += len; tty->flip.count += len; tty_schedule_flip(tty); portp->stats.rxtotal += len; } } } else { stl_sc26198rxbadchars(portp); } /* * If we are TX flow controlled and in IXANY mode then we may need * to unflow control here. We gotta do this because of the automatic * flow control modes of the sc26198. */ if (test_bit(ASYI_TXFLOWED, &portp->istate)) { if ((tty != (struct tty_struct *) NULL) && (tty->termios != (struct termios *) NULL) && (tty->termios->c_iflag & IXANY)) { stl_sc26198txunflow(portp, tty); } } } /*****************************************************************************/ /* * Process an RX bad character. */ static void inline stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch) { struct tty_struct *tty; unsigned int ioaddr; tty = portp->tty; ioaddr = portp->ioaddr; if (status & SR_RXPARITY) portp->stats.rxparity++; if (status & SR_RXFRAMING) portp->stats.rxframing++; if (status & SR_RXOVERRUN) portp->stats.rxoverrun++; if (status & SR_RXBREAK) portp->stats.rxbreaks++; if ((tty != (struct tty_struct *) NULL) && ((portp->rxignoremsk & status) == 0)) { if (portp->rxmarkmsk & status) { if (status & SR_RXBREAK) { status = TTY_BREAK; if (portp->flags & ASYNC_SAK) { do_SAK(tty); BRDENABLE(portp->brdnr, portp->pagenr); } } else if (status & SR_RXPARITY) { status = TTY_PARITY; } else if (status & SR_RXFRAMING) { status = TTY_FRAME; } else if(status & SR_RXOVERRUN) { status = TTY_OVERRUN; } else { status = 0; } } else { status = 0; } if (tty->flip.char_buf_ptr != (char *) NULL) { if (tty->flip.count < TTY_FLIPBUF_SIZE) { *tty->flip.flag_buf_ptr++ = status; *tty->flip.char_buf_ptr++ = ch; tty->flip.count++; } tty_schedule_flip(tty); } if (status == 0) portp->stats.rxtotal++; } } /*****************************************************************************/ /* * Process all characters in the RX FIFO of the UART. Check all char * status bytes as well, and process as required. We need to check * all bytes in the FIFO, in case some more enter the FIFO while we * are here. To get the exact character error type we need to switch * into CHAR error mode (that is why we need to make sure we empty * the FIFO). */ static void stl_sc26198rxbadchars(stlport_t *portp) { unsigned char status, mr1; char ch; /* * To get the precise error type for each character we must switch * back into CHAR error mode. */ mr1 = stl_sc26198getreg(portp, MR1); stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); ch = stl_sc26198getreg(portp, RXFIFO); stl_sc26198rxbadch(portp, status, ch); } /* * To get correct interrupt class we must switch back into BLOCK * error mode. */ stl_sc26198setreg(portp, MR1, mr1); } /*****************************************************************************/ /* * Other interrupt handler. This includes modem signals, flow * control actions, etc. Most stuff is left to off-level interrupt * processing time. */ static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack) { unsigned char cir, ipr, xisr; #if DEBUG printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack); #endif cir = stl_sc26198getglobreg(portp, CIR); switch (cir & CIR_SUBTYPEMASK) { case CIR_SUBCOS: ipr = stl_sc26198getreg(portp, IPR); if (ipr & IPR_DCDCHANGE) { set_bit(ASYI_DCDCHANGE, &portp->istate); queue_task_irq_off(&portp->tqueue, &tq_scheduler); portp->stats.modem++; } break; case CIR_SUBXONXOFF: xisr = stl_sc26198getreg(portp, XISR); if (xisr & XISR_RXXONGOT) { set_bit(ASYI_TXFLOWED, &portp->istate); portp->stats.txxoff++; } if (xisr & XISR_RXXOFFGOT) { clear_bit(ASYI_TXFLOWED, &portp->istate); portp->stats.txxon++; } break; case CIR_SUBBREAK: stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); stl_sc26198rxbadchars(portp); break; default: break; } } /*****************************************************************************/