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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [char/] [specialix.c] - Rev 199
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/* * specialix.c -- specialix IO8+ multiport serial driver. * * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl) * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) * * Specialix pays for the development and support of this driver. * Please DO contact io8-linux@specialix.co.uk if you require * support. But please read the documentation (specialix.txt) * first. * * This driver was developped in the BitWizard linux device * driver service. If you require a linux device driver for your * product, please contact devices@BitWizard.nl for a quote. * * This code is firmly based on the riscom/8 serial driver, * written by Dmitry Gorodchanin. The specialix IO8+ card * programming information was obtained from the CL-CD1865 Data * Book, and Specialix document number 6200059: IO8+ Hardware * Functional Specification. * * 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. * * Revision history: * * Revision 1.0: April 1st 1997. * Initial release for alpha testing. * Revision 1.1: April 14th 1997. * Incorporated Richard Hudsons suggestions, * removed some debugging printk's. * Revision 1.2: April 15th 1997. * Ported to 2.1.x kernels. * Revision 1.3: April 17th 1997 * Backported to 2.0. (Compatibility macros). * Revision 1.4: April 18th 1997 * Fixed DTR/RTS bug that caused the card to indicate * "don't send data" to a modem after the password prompt. * Fixed bug for premature (fake) interrupts. * Revision 1.5: April 19th 1997 * fixed a minor typo in the header file, cleanup a little. * performance warnings are now MAXed at once per minute. * Revision 1.6: May 23 1997 * Changed the specialix=... format to include interrupt. * Revision 1.7: May 27 1997 * Made many more debug printk's a compile time option. * Revision 1.8: Port to 2.1 kernel. -- Not here. * * Revision 1.9: October 1 1998 * Support for the PCI version of the card. * */ #define VERSION "1.9" /* * There is a bunch of documentation about the card, jumpers, config * settings, restrictions, cables, device names and numbers in * ../../Documentation/specialix.txt */ #include <linux/module.h> #include <linux/config.h> /* CONFIG_SPECIALIX_RTSCTS */ #include <asm/io.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/errno.h> #include <linux/tty.h> #include <linux/mm.h> #include <linux/serial.h> #include <linux/fcntl.h> #include <linux/major.h> #include <linux/delay.h> #include <linux/tqueue.h> #include <linux/version.h> #include <linux/pci.h> #include <linux/bios32.h> /* ************************************************************** */ /* * This section can be removed when 2.0 becomes outdated.... * */ /* ************************************************************** */ #if LINUX_VERSION_CODE < 131328 /* Less than 2.1.0 */ #define TWO_ZERO #else #if LINUX_VERSION_CODE < 131368 /* less than 2.1.40 */ /* This has not been extensively tested yet. Sorry. */ #warning "You're on your own between 2.1.0 and 2.1.40.... " #warning "Please use 2.1.40 or higher." #endif #endif #ifdef TWO_ZERO #define Get_user(a,b) a = get_user(b) #define copy_from_user(a,b,c) memcpy_fromfs(a,b,c) #define copy_to_user(a,b,c) memcpy_tofs(a,b,c) #define queue_task queue_task_irq_off #else #define Get_user(a,b) get_user(a,b) #endif /* ************************************************************** */ /* * End of compatibility section.. * */ /* ************************************************************** */ #ifndef TWO_ZERO #include <asm/uaccess.h> #endif #include "specialix_io8.h" #include "cd1865.h" /* Configurable options: */ /* Am I paranoid or not ? ;-) */ #define SPECIALIX_PARANOIA_CHECK /* Do I trust the IRQ from the card? (enabeling it doesn't seem to help) When the IRQ routine leaves the chip in a state that is keeps on requiring attention, the timer doesn't help either. */ #undef SPECIALIX_TIMER /* * The following defines are mostly for testing purposes. But if you need * some nice reporting in your syslog, you can define them also. */ #undef SX_REPORT_FIFO #undef SX_REPORT_OVERRUN #ifdef CONFIG_SPECIALIX_RTSCTS #define SX_CRTSCTS(bla) 1 #else #define SX_CRTSCTS(tty) C_CRTSCTS(tty) #endif /* Used to be outb (0xff, 0x80); */ #define short_pause() udelay (1) #define SPECIALIX_LEGAL_FLAGS \ (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) #ifndef MIN #define MIN(a,b) ((a) < (b) ? (a) : (b)) #endif DECLARE_TASK_QUEUE(tq_specialix); #define SPECIALIX_TYPE_NORMAL 1 #define SPECIALIX_TYPE_CALLOUT 2 static struct tty_driver specialix_driver, specialix_callout_driver; static int specialix_refcount = 0; static struct tty_struct * specialix_table[SX_NBOARD * SX_NPORT] = { NULL, }; static struct termios * specialix_termios[SX_NBOARD * SX_NPORT] = { NULL, }; static struct termios * specialix_termios_locked[SX_NBOARD * SX_NPORT] = { NULL, }; static unsigned char * tmp_buf = NULL; static struct semaphore tmp_buf_sem = MUTEX; static unsigned long baud_table[] = { 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 0, }; static struct specialix_board sx_board[SX_NBOARD] = { { 0, SX_IOBASE1, 9, }, { 0, SX_IOBASE2, 11, }, { 0, SX_IOBASE3, 12, }, { 0, SX_IOBASE4, 15, }, }; static struct specialix_port sx_port[SX_NBOARD * SX_NPORT] = { { 0, }, }; #ifdef SPECIALIX_TIMER static struct timer_list missed_irq_timer; static void sx_interrupt(int irq, void * dev_id, struct pt_regs * regs); #endif static inline int sx_paranoia_check(struct specialix_port const * port, kdev_t device, const char *routine) { #ifdef SPECIALIX_PARANOIA_CHECK static const char *badmagic = KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n"; static const char *badinfo = KERN_ERR "sx: Warning: null specialix port for device %s in %s\n"; if (!port) { printk(badinfo, kdevname(device), routine); return 1; } if (port->magic != SPECIALIX_MAGIC) { printk(badmagic, kdevname(device), routine); return 1; } #endif return 0; } /* * * Service functions for specialix IO8+ driver. * */ /* Get board number from pointer */ extern inline int board_No (struct specialix_board * bp) { return bp - sx_board; } /* Get port number from pointer */ extern inline int port_No (struct specialix_port const * port) { return SX_PORT(port - sx_port); } /* Get pointer to board from pointer to port */ extern inline struct specialix_board * port_Board(struct specialix_port const * port) { return &sx_board[SX_BOARD(port - sx_port)]; } /* Input Byte from CL CD186x register */ extern inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg) { bp->reg = reg | 0x80; outb (reg | 0x80, bp->base + SX_ADDR_REG); return inb (bp->base + SX_DATA_REG); } /* Output Byte to CL CD186x register */ extern inline void sx_out(struct specialix_board * bp, unsigned short reg, unsigned char val) { bp->reg = reg | 0x80; outb (reg | 0x80, bp->base + SX_ADDR_REG); outb (val, bp->base + SX_DATA_REG); } /* Input Byte from CL CD186x register */ extern inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg) { bp->reg = reg; outb (reg, bp->base + SX_ADDR_REG); return inb (bp->base + SX_DATA_REG); } /* Output Byte to CL CD186x register */ extern inline void sx_out_off(struct specialix_board * bp, unsigned short reg, unsigned char val) { bp->reg = reg; outb (reg, bp->base + SX_ADDR_REG); outb (val, bp->base + SX_DATA_REG); } /* Wait for Channel Command Register ready */ extern inline void sx_wait_CCR(struct specialix_board * bp) { unsigned long delay; for (delay = SX_CCR_TIMEOUT; delay; delay--) if (!sx_in(bp, CD186x_CCR)) return; printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); } /* Wait for Channel Command Register ready */ extern inline void sx_wait_CCR_off(struct specialix_board * bp) { unsigned long delay; for (delay = SX_CCR_TIMEOUT; delay; delay--) if (!sx_in_off(bp, CD186x_CCR)) return; printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); } /* * specialix IO8+ IO range functions. */ extern inline int sx_check_io_range(struct specialix_board * bp) { return check_region (bp->base, bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE); } extern inline void sx_request_io_range(struct specialix_board * bp) { request_region(bp->base, bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE, "specialix IO8+" ); } extern inline void sx_release_io_range(struct specialix_board * bp) { release_region(bp->base, bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE); } /* Must be called with enabled interrupts */ /* Ugly. Don't use this for anything else than initialization code */ extern inline void sx_long_delay(unsigned long delay) { unsigned long i; for (i = jiffies + delay; i > jiffies; ) ; } /* Set the IRQ using the RTS lines that run to the PAL on the board.... */ int sx_set_irq ( struct specialix_board *bp) { int virq; int i; if (bp->flags & SX_BOARD_IS_PCI) return 1; switch (bp->irq) { /* In the same order as in the docs... */ case 15: virq = 0;break; case 12: virq = 1;break; case 11: virq = 2;break; case 9: virq = 3;break; default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq); return 0; } for (i=0;i<2;i++) { sx_out(bp, CD186x_CAR, i); sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0); } return 1; } /* Reset and setup CD186x chip */ static int sx_init_CD186x(struct specialix_board * bp) { unsigned long flags; int scaler; int rv = 1; save_flags(flags); cli(); sx_wait_CCR_off(bp); /* Wait for CCR ready */ sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */ sti(); sx_long_delay(HZ/20); /* Delay 0.05 sec */ cli(); sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */ sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */ sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */ sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */ sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */ /* Set RegAckEn */ sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN); /* Setting up prescaler. We need 4 ticks per 1 ms */ scaler = SX_OSCFREQ/SPECIALIX_TPS; sx_out_off(bp, CD186x_PPRH, scaler >> 8); sx_out_off(bp, CD186x_PPRL, scaler & 0xff); if (!sx_set_irq (bp)) { /* Figure out how to pass this along... */ printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq); rv = 0; } restore_flags(flags); return rv; } int read_cross_byte (struct specialix_board *bp, int reg, int bit) { int i; int t; for (i=0, t=0;i<8;i++) { sx_out_off (bp, CD186x_CAR, i); if (sx_in_off (bp, reg) & bit) t |= 1 << i; } return t; } #ifdef SPECIALIX_TIMER void missed_irq (unsigned long data) { if (sx_in ((struct specialix_board *)data, CD186x_SRSR) & (SRSR_RREQint | SRSR_TREQint | SRSR_MREQint)) { printk (KERN_INFO "Missed interrupt... Calling int from timer. \n"); sx_interrupt (((struct specialix_board *)data)->irq, NULL, NULL); } missed_irq_timer.expires = jiffies + HZ; add_timer (&missed_irq_timer); } #endif /* Main probing routine, also sets irq. */ static int sx_probe(struct specialix_board *bp) { unsigned char val1, val2; #if 0 int irqs = 0; int retries; #endif int rev; int chip; if (sx_check_io_range(bp)) return 1; /* Are the I/O ports here ? */ sx_out_off(bp, CD186x_PPRL, 0x5a); short_pause (); val1 = sx_in_off(bp, CD186x_PPRL); sx_out_off(bp, CD186x_PPRL, 0xa5); short_pause (); val2 = sx_in_off(bp, CD186x_PPRL); if ((val1 != 0x5a) || (val2 != 0xa5)) { printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n", board_No(bp), bp->base); return 1; } /* Check the DSR lines that Specialix uses as board identification */ val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR); val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS); #ifdef SPECIALIX_DEBUG printk (KERN_DEBUG "sx%d: DSR lines are: %02x, rts lines are: %02x\n", board_No(bp), val1, val2); #endif /* They managed to switch the bit order between the docs and the IO8+ card. The new PCI card now conforms to old docs. They changed the PCI docs to reflect the situation on the old card. */ val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2; if (val1 != val2) { printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n", board_No(bp), val2, bp->base, val1); return 1; } #if 0 /* It's time to find IRQ for this board */ for (retries = 0; retries < 5 && irqs <= 0; retries++) { irqs = probe_irq_on(); sx_init_CD186x(bp); /* Reset CD186x chip */ sx_out(bp, CD186x_CAR, 2); /* Select port 2 */ sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */ sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */ sx_long_delay(HZ/20); irqs = probe_irq_off(irqs); #if SPECIALIX_DEBUG > 2 printk (KERN_DEBUG "SRSR = %02x, ", sx_in(bp, CD186x_SRSR)); printk ( "TRAR = %02x, ", sx_in(bp, CD186x_TRAR)); printk ( "GIVR = %02x, ", sx_in(bp, CD186x_GIVR)); printk ( "GICR = %02x, ", sx_in(bp, CD186x_GICR)); printk ( "\n"); #endif /* Reset CD186x again */ if (!sx_init_CD186x(bp)) { /* Hmmm. This is dead code anyway. */ } #if SPECIALIX_DEBUG > 2 printk (KERN_DEBUG "val1 = %02x, val2 = %02x, val3 = %02x.\n", val1, val2, val3); #endif } #if 0 if (irqs <= 0) { printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n", board_No(bp), bp->base); return 1; } #endif printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs); if (irqs > 0) bp->irq = irqs; #endif /* Reset CD186x again */ if (!sx_init_CD186x(bp)) { return -EIO; } sx_request_io_range(bp); bp->flags |= SX_BOARD_PRESENT; /* Chip revcode pkgtype GFRCR SRCR bit 7 CD180 rev B 0x81 0 CD180 rev C 0x82 0 CD1864 rev A 0x82 1 CD1865 rev A 0x83 1 -- Do not use!!! Does not work. CD1865 rev B 0x84 1 -- Thanks to Gwen Wang, Cirrus Logic. */ switch (sx_in_off(bp, CD186x_GFRCR)) { case 0x82:chip = 1864;rev='A';break; case 0x83:chip = 1865;rev='A';break; case 0x84:chip = 1865;rev='B';break; case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */ default:chip=-1;rev='x'; } #if SPECIALIX_DEBUG > 2 printk (KERN_DEBUG " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) ); #endif #ifdef SPECIALIX_TIMER init_timer (&missed_irq_timer); missed_irq_timer.function = missed_irq; missed_irq_timer.data = (unsigned long) bp; missed_irq_timer.expires = jiffies + HZ; add_timer (&missed_irq_timer); #endif printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n", board_No(bp), bp->base, bp->irq, chip, rev); return 0; } /* * * Interrupt processing routines. * */ extern inline void sx_mark_event(struct specialix_port * port, int event) { /* * I'm not quite happy with current scheme all serial * drivers use their own BH routine. * It seems this easily can be done with one BH routine * serving for all serial drivers. * For now I must introduce another one - SPECIALIX_BH. * Still hope this will be changed in near future. * -- Dmitry. */ set_bit(event, &port->event); queue_task(&port->tqueue, &tq_specialix); mark_bh(SPECIALIX_BH); } extern inline struct specialix_port * sx_get_port(struct specialix_board * bp, unsigned char const * what) { unsigned char channel; struct specialix_port * port; channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF; if (channel < CD186x_NCH) { port = &sx_port[board_No(bp) * SX_NPORT + channel]; if (port->flags & ASYNC_INITIALIZED) { return port; } } printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n", board_No(bp), what, channel); return NULL; } extern inline void sx_receive_exc(struct specialix_board * bp) { struct specialix_port *port; struct tty_struct *tty; unsigned char status; unsigned char ch; if (!(port = sx_get_port(bp, "Receive"))) return; tty = port->tty; if (tty->flip.count >= TTY_FLIPBUF_SIZE) { printk(KERN_INFO "sx%d: port %d: Working around flip buffer overflow.\n", board_No(bp), port_No(port)); return; } #ifdef SX_REPORT_OVERRUN status = sx_in(bp, CD186x_RCSR); if (status & RCSR_OE) { port->overrun++; #if SPECIALIX_DEBUG printk(KERN_DEBUG "sx%d: port %d: Overrun. Total %ld overruns.\n", board_No(bp), port_No(port), port->overrun); #endif } status &= port->mark_mask; #else status = sx_in(bp, CD186x_RCSR) & port->mark_mask; #endif ch = sx_in(bp, CD186x_RDR); if (!status) { return; } if (status & RCSR_TOUT) { printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n", board_No(bp), port_No(port)); return; } else if (status & RCSR_BREAK) { #ifdef SPECIALIX_DEBUG printk(KERN_DEBUG "sx%d: port %d: Handling break...\n", board_No(bp), port_No(port)); #endif *tty->flip.flag_buf_ptr++ = TTY_BREAK; if (port->flags & ASYNC_SAK) do_SAK(tty); } else if (status & RCSR_PE) *tty->flip.flag_buf_ptr++ = TTY_PARITY; else if (status & RCSR_FE) *tty->flip.flag_buf_ptr++ = TTY_FRAME; else if (status & RCSR_OE) *tty->flip.flag_buf_ptr++ = TTY_OVERRUN; else *tty->flip.flag_buf_ptr++ = 0; *tty->flip.char_buf_ptr++ = ch; tty->flip.count++; queue_task(&tty->flip.tqueue, &tq_timer); } extern inline void sx_receive(struct specialix_board * bp) { struct specialix_port *port; struct tty_struct *tty; unsigned char count; if (!(port = sx_get_port(bp, "Receive"))) return; tty = port->tty; count = sx_in(bp, CD186x_RDCR); #ifdef SX_REPORT_FIFO port->hits[count > 8 ? 9 : count]++; #endif while (count--) { if (tty->flip.count >= TTY_FLIPBUF_SIZE) { printk(KERN_INFO "sx%d: port %d: Working around flip buffer overflow.\n", board_No(bp), port_No(port)); break; } *tty->flip.char_buf_ptr++ = sx_in(bp, CD186x_RDR); *tty->flip.flag_buf_ptr++ = 0; tty->flip.count++; } queue_task(&tty->flip.tqueue, &tq_timer); } extern inline void sx_transmit(struct specialix_board * bp) { struct specialix_port *port; struct tty_struct *tty; unsigned char count; if (!(port = sx_get_port(bp, "Transmit"))) return; tty = port->tty; if (port->IER & IER_TXEMPTY) { /* FIFO drained */ sx_out(bp, CD186x_CAR, port_No(port)); port->IER &= ~IER_TXEMPTY; sx_out(bp, CD186x_IER, port->IER); return; } if ((port->xmit_cnt <= 0 && !port->break_length) || tty->stopped || tty->hw_stopped) { sx_out(bp, CD186x_CAR, port_No(port)); port->IER &= ~IER_TXRDY; sx_out(bp, CD186x_IER, port->IER); return; } if (port->break_length) { if (port->break_length > 0) { if (port->COR2 & COR2_ETC) { sx_out(bp, CD186x_TDR, CD186x_C_ESC); sx_out(bp, CD186x_TDR, CD186x_C_SBRK); port->COR2 &= ~COR2_ETC; } count = MIN(port->break_length, 0xff); sx_out(bp, CD186x_TDR, CD186x_C_ESC); sx_out(bp, CD186x_TDR, CD186x_C_DELAY); sx_out(bp, CD186x_TDR, count); if (!(port->break_length -= count)) port->break_length--; } else { sx_out(bp, CD186x_TDR, CD186x_C_ESC); sx_out(bp, CD186x_TDR, CD186x_C_EBRK); sx_out(bp, CD186x_COR2, port->COR2); sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_CORCHG2); port->break_length = 0; } return; } count = CD186x_NFIFO; do { sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); if (--port->xmit_cnt <= 0) break; } while (--count > 0); if (port->xmit_cnt <= 0) { sx_out(bp, CD186x_CAR, port_No(port)); port->IER &= ~IER_TXRDY; sx_out(bp, CD186x_IER, port->IER); } if (port->xmit_cnt <= port->wakeup_chars) sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); } extern inline void sx_check_modem(struct specialix_board * bp) { struct specialix_port *port; struct tty_struct *tty; unsigned char mcr; #ifdef SPECIALIX_DEBUG printk (KERN_DEBUG "Modem intr. "); #endif if (!(port = sx_get_port(bp, "Modem"))) return; tty = port->tty; mcr = sx_in(bp, CD186x_MCR); printk ("mcr = %02x.\n", mcr); if ((mcr & MCR_CDCHG)) { #ifdef SPECIALIX_DEBUG printk (KERN_DEBUG "CD just changed... "); #endif if (sx_in(bp, CD186x_MSVR) & MSVR_CD) { #ifdef SPECIALIX_DEBUG printk ( "Waking up guys in open.\n"); #endif wake_up_interruptible(&port->open_wait); } else if (!((port->flags & ASYNC_CALLOUT_ACTIVE) && (port->flags & ASYNC_CALLOUT_NOHUP))) { #ifdef SPECIALIX_DEBUG printk ( "Sending HUP.\n"); #endif queue_task(&port->tqueue_hangup, &tq_scheduler); } else { #ifdef SPECIALIX_DEBUG printk ( "Don't need to send HUP.\n"); #endif } } #ifdef SPECIALIX_BRAIN_DAMAGED_CTS if (mcr & MCR_CTSCHG) { if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { tty->hw_stopped = 0; port->IER |= IER_TXRDY; if (port->xmit_cnt <= port->wakeup_chars) sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); } else { tty->hw_stopped = 1; port->IER &= ~IER_TXRDY; } sx_out(bp, CD186x_IER, port->IER); } if (mcr & MCR_DSSXHG) { if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { tty->hw_stopped = 0; port->IER |= IER_TXRDY; if (port->xmit_cnt <= port->wakeup_chars) sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); } else { tty->hw_stopped = 1; port->IER &= ~IER_TXRDY; } sx_out(bp, CD186x_IER, port->IER); } #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ /* Clear change bits */ sx_out(bp, CD186x_MCR, 0); } /* The main interrupt processing routine */ static void sx_interrupt(int irq, void * dev_id, struct pt_regs * regs) { unsigned char status; unsigned char ack; struct specialix_board *bp; unsigned long loop = 0; int saved_reg; bp = dev_id; if (!bp || !(bp->flags & SX_BOARD_ACTIVE)) { #ifdef SPECIALIX_DEBUG printk (KERN_DEBUG "sx: False interrupt. irq %d.\n", irq); #endif return; } saved_reg = bp->reg; while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) & (SRSR_RREQint | SRSR_TREQint | SRSR_MREQint)))) { if (status & SRSR_RREQint) { ack = sx_in(bp, CD186x_RRAR); if (ack == (SX_ID | GIVR_IT_RCV)) sx_receive(bp); else if (ack == (SX_ID | GIVR_IT_REXC)) sx_receive_exc(bp); else printk(KERN_ERR "sx%d: Bad receive ack 0x%02x.\n", board_No(bp), ack); } else if (status & SRSR_TREQint) { ack = sx_in(bp, CD186x_TRAR); if (ack == (SX_ID | GIVR_IT_TX)) sx_transmit(bp); else printk(KERN_ERR "sx%d: Bad transmit ack 0x%02x.\n", board_No(bp), ack); } else if (status & SRSR_MREQint) { ack = sx_in(bp, CD186x_MRAR); if (ack == (SX_ID | GIVR_IT_MODEM)) sx_check_modem(bp); else printk(KERN_ERR "sx%d: Bad modem ack 0x%02x.\n", board_No(bp), ack); } sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ } bp->reg = saved_reg; outb (bp->reg, bp->base + SX_ADDR_REG); } /* * Routines for open & close processing. */ void turn_ints_off (struct specialix_board *bp) { if (bp->flags & SX_BOARD_IS_PCI) { /* This was intended for enabeling the interrupt on the * PCI card. However it seems that it's already enabled * and as PCI interrupts can be shared, there is no real * reason to have to turn it off. */ } (void) sx_in_off (bp, 0); /* Turn off interrupts. */ } void turn_ints_on (struct specialix_board *bp) { if (bp->flags & SX_BOARD_IS_PCI) { /* play with the PCI chip. See comment above */ } (void) sx_in (bp, 0); /* Turn ON interrupts. */ } /* Called with disabled interrupts */ extern inline int sx_setup_board(struct specialix_board * bp) { int error; if (bp->flags & SX_BOARD_ACTIVE) return 0; error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT, "specialix IO8+", bp); if (error) return error; turn_ints_on (bp); bp->flags |= SX_BOARD_ACTIVE; MOD_INC_USE_COUNT; return 0; } /* Called with disabled interrupts */ extern inline void sx_shutdown_board(struct specialix_board *bp) { if (!(bp->flags & SX_BOARD_ACTIVE)) return; bp->flags &= ~SX_BOARD_ACTIVE; #if SPECIALIX_DEBUG > 2 printk ("Freeing IRQ%d for board %d.\n", bp->irq, board_No (bp)); #endif free_irq(bp->irq, bp); turn_ints_off (bp); MOD_DEC_USE_COUNT; } /* * Setting up port characteristics. * Must be called with disabled interrupts */ static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port) { struct tty_struct *tty; unsigned long baud; long tmp; unsigned char cor1 = 0, cor3 = 0; unsigned char mcor1 = 0, mcor2 = 0; static int again=0; if (!(tty = port->tty) || !tty->termios) return; port->IER = 0; port->COR2 = 0; /* Select port on the board */ sx_out(bp, CD186x_CAR, port_No(port)); /* The Specialix board doens't implement the RTS lines. They are used to set the IRQ level. Don't touch them. */ if (SX_CRTSCTS(tty)) port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); else port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); #ifdef DEBUG_SPECIALIX printk (KERN_DEBUG "sx: got MSVR=%02x.\n", port->MSVR); #endif baud = C_BAUD(tty); if (baud & CBAUDEX) { baud &= ~CBAUDEX; if (baud < 1 || baud > 2) port->tty->termios->c_cflag &= ~CBAUDEX; else baud += 15; } if (baud == 15) { if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) baud ++; if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) baud += 2; } if (!baud_table[baud]) { /* Drop DTR & exit */ #ifdef SPECIALIX_DEBUG printk (KERN_DEBUG "Dropping DTR... Hmm....\n"); #endif if (!SX_CRTSCTS (tty)) { port -> MSVR &= ~ MSVR_DTR; sx_out(bp, CD186x_MSVR, port->MSVR ); } #ifdef DEBUG_SPECIALIX else printk (KERN_DEBUG "Can't drop DTR: no DTR.\n"); #endif return; } else { /* Set DTR on */ if (!SX_CRTSCTS (tty)) { port ->MSVR |= MSVR_DTR; } } /* * Now we must calculate some speed depended things */ /* Set baud rate for port */ tmp = (((SX_OSCFREQ + baud_table[baud]/2) / baud_table[baud] + CD186x_TPC/2) / CD186x_TPC); if ((tmp < 0x10) && (again < jiffies)) { again = jiffies + HZ * 60; /* Page 48 of version 2.0 of the CL-CD1865 databook */ if (tmp >= 12) { printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" "Performance degradation is possible.\n" "Read specialix.txt for more info.\n", port_No (port), tmp); } else { printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" "Warning: overstressing Cirrus chip. " "This might not work.\n" "Read specialix.txt for more info.\n", port_No (port), tmp); } } sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); sx_out(bp, CD186x_RBPRL, tmp & 0xff); sx_out(bp, CD186x_TBPRL, tmp & 0xff); baud = (baud_table[baud] + 5) / 10; /* Estimated CPS */ /* Two timer ticks seems enough to wakeup something like SLIP driver */ tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? SERIAL_XMIT_SIZE - 1 : tmp); /* Receiver timeout will be transmission time for 1.5 chars */ tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; tmp = (tmp > 0xff) ? 0xff : tmp; sx_out(bp, CD186x_RTPR, tmp); switch (C_CSIZE(tty)) { case CS5: cor1 |= COR1_5BITS; break; case CS6: cor1 |= COR1_6BITS; break; case CS7: cor1 |= COR1_7BITS; break; case CS8: cor1 |= COR1_8BITS; break; } if (C_CSTOPB(tty)) cor1 |= COR1_2SB; cor1 |= COR1_IGNORE; if (C_PARENB(tty)) { cor1 |= COR1_NORMPAR; if (C_PARODD(tty)) cor1 |= COR1_ODDP; if (I_INPCK(tty)) cor1 &= ~COR1_IGNORE; } /* Set marking of some errors */ port->mark_mask = RCSR_OE | RCSR_TOUT; if (I_INPCK(tty)) port->mark_mask |= RCSR_FE | RCSR_PE; if (I_BRKINT(tty) || I_PARMRK(tty)) port->mark_mask |= RCSR_BREAK; if (I_IGNPAR(tty)) port->mark_mask &= ~(RCSR_FE | RCSR_PE); if (I_IGNBRK(tty)) { port->mark_mask &= ~RCSR_BREAK; if (I_IGNPAR(tty)) /* Real raw mode. Ignore all */ port->mark_mask &= ~RCSR_OE; } /* Enable Hardware Flow Control */ if (C_CRTSCTS(tty)) { #ifdef SPECIALIX_BRAIN_DAMAGED_CTS port->IER |= IER_DSR | IER_CTS; mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR)); #else port->COR2 |= COR2_CTSAE; #endif } /* Enable Software Flow Control. FIXME: I'm not sure about this */ /* Some people reported that it works, but I still doubt it */ if (I_IXON(tty)) { port->COR2 |= COR2_TXIBE; cor3 |= (COR3_FCT | COR3_SCDE); if (I_IXANY(tty)) port->COR2 |= COR2_IXM; sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); } if (!C_CLOCAL(tty)) { /* Enable CD check */ port->IER |= IER_CD; mcor1 |= MCOR1_CDZD; mcor2 |= MCOR2_CDOD; } if (C_CREAD(tty)) /* Enable receiver */ port->IER |= IER_RXD; /* Set input FIFO size (1-8 bytes) */ cor3 |= SPECIALIX_RXFIFO; /* Setting up CD186x channel registers */ sx_out(bp, CD186x_COR1, cor1); sx_out(bp, CD186x_COR2, port->COR2); sx_out(bp, CD186x_COR3, cor3); /* Make CD186x know about registers change */ sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); /* Setting up modem option registers */ #ifdef DEBUG_SPECIALIX printk ("Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2); #endif sx_out(bp, CD186x_MCOR1, mcor1); sx_out(bp, CD186x_MCOR2, mcor2); /* Enable CD186x transmitter & receiver */ sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); /* Enable interrupts */ sx_out(bp, CD186x_IER, port->IER); /* And finally set the modem lines... */ sx_out(bp, CD186x_MSVR, port->MSVR); } /* Must be called with interrupts enabled */ static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port) { unsigned long flags; if (port->flags & ASYNC_INITIALIZED) return 0; if (!port->xmit_buf) { /* We may sleep in get_free_page() */ unsigned long tmp; if (!(tmp = get_free_page(GFP_KERNEL))) return -ENOMEM; if (port->xmit_buf) { free_page(tmp); return -ERESTARTSYS; } port->xmit_buf = (unsigned char *) tmp; } save_flags(flags); cli(); if (port->tty) clear_bit(TTY_IO_ERROR, &port->tty->flags); if (port->count == 1) bp->count++; port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; sx_change_speed(bp, port); port->flags |= ASYNC_INITIALIZED; restore_flags(flags); return 0; } /* Must be called with interrupts disabled */ static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port) { struct tty_struct *tty; if (!(port->flags & ASYNC_INITIALIZED)) return; #ifdef SX_REPORT_OVERRUN printk(KERN_INFO "sx%d: port %d: Total %ld overruns were detected.\n", board_No(bp), port_No(port), port->overrun); #endif #ifdef SX_REPORT_FIFO { int i; printk(KERN_INFO "sx%d: port %d: FIFO hits [ ", board_No(bp), port_No(port)); for (i = 0; i < 10; i++) { printk("%ld ", port->hits[i]); } printk("].\n"); } #endif if (port->xmit_buf) { free_page((unsigned long) port->xmit_buf); port->xmit_buf = NULL; } /* Select port */ sx_out(bp, CD186x_CAR, port_No(port)); if (!(tty = port->tty) || C_HUPCL(tty)) { /* Drop DTR */ sx_out(bp, CD186x_MSVDTR, 0); } /* Reset port */ sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_SOFTRESET); /* Disable all interrupts from this port */ port->IER = 0; sx_out(bp, CD186x_IER, port->IER); if (tty) set_bit(TTY_IO_ERROR, &tty->flags); port->flags &= ~ASYNC_INITIALIZED; if (--bp->count < 0) { printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d\n", board_No(bp), bp->count); bp->count = 0; } /* * If this is the last opened port on the board * shutdown whole board */ if (!bp->count) sx_shutdown_board(bp); } static int block_til_ready(struct tty_struct *tty, struct file * filp, struct specialix_port *port) { struct wait_queue wait = { current, NULL }; struct specialix_board *bp = port_Board(port); int retval; int do_clocal = 0; int CD; /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { interruptible_sleep_on(&port->close_wait); if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; else return -ERESTARTSYS; } /* * If this is a callout device, then just make sure the normal * device isn't being used. */ if (tty->driver.subtype == SPECIALIX_TYPE_CALLOUT) { if (port->flags & ASYNC_NORMAL_ACTIVE) return -EBUSY; if ((port->flags & ASYNC_CALLOUT_ACTIVE) && (port->flags & ASYNC_SESSION_LOCKOUT) && (port->session != current->session)) return -EBUSY; if ((port->flags & ASYNC_CALLOUT_ACTIVE) && (port->flags & ASYNC_PGRP_LOCKOUT) && (port->pgrp != current->pgrp)) return -EBUSY; port->flags |= ASYNC_CALLOUT_ACTIVE; return 0; } /* * If non-blocking mode is set, or the port is not enabled, * then make the check up front and then exit. */ if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { if (port->flags & ASYNC_CALLOUT_ACTIVE) return -EBUSY; port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } if (port->flags & ASYNC_CALLOUT_ACTIVE) { if (port->normal_termios.c_cflag & CLOCAL) do_clocal = 1; } else { if (C_CLOCAL(tty)) do_clocal = 1; } /* * Block waiting for the carrier detect and the line to become * free (i.e., not in use by the callout). While we are in * this loop, info->count is dropped by one, so that * rs_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; add_wait_queue(&port->open_wait, &wait); cli(); if (!tty_hung_up_p(filp)) port->count--; sti(); port->blocked_open++; while (1) { cli(); sx_out(bp, CD186x_CAR, port_No(port)); CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; if (!(port->flags & ASYNC_CALLOUT_ACTIVE)) { if (SX_CRTSCTS (tty)) { /* Activate RTS */ port->MSVR |= MSVR_DTR; sx_out (bp, CD186x_MSVR, port->MSVR); } else { /* Activate DTR */ port->MSVR |= MSVR_DTR; sx_out (bp, CD186x_MSVR, port->MSVR); } } sti(); current->state = TASK_INTERRUPTIBLE; if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { if (port->flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; break; } if (!(port->flags & ASYNC_CALLOUT_ACTIVE) && !(port->flags & ASYNC_CLOSING) && (do_clocal || CD)) break; if (current->signal & ~current->blocked) { retval = -ERESTARTSYS; break; } schedule(); } current->state = TASK_RUNNING; remove_wait_queue(&port->open_wait, &wait); if (!tty_hung_up_p(filp)) port->count++; port->blocked_open--; if (retval) return retval; port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } static int sx_open(struct tty_struct * tty, struct file * filp) { int board; int error; struct specialix_port * port; struct specialix_board * bp; unsigned long flags; board = SX_BOARD(MINOR(tty->device)); if (board > SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) return -ENODEV; bp = &sx_board[board]; port = sx_port + board * SX_NPORT + SX_PORT(MINOR(tty->device)); #ifdef DEBUG_SPECIALIX printk (KERN_DEBUG "Board = %d, bp = %p, port = %p, portno = %d.\n", board, bp, port, SX_PORT(MINOR(tty->device))); #endif if (sx_paranoia_check(port, tty->device, "sx_open")) return -ENODEV; if ((error = sx_setup_board(bp))) return error; port->count++; tty->driver_data = port; port->tty = tty; if ((error = sx_setup_port(bp, port))) return error; if ((error = block_til_ready(tty, filp, port))) return error; if ((port->count == 1) && (port->flags & ASYNC_SPLIT_TERMIOS)) { if (tty->driver.subtype == SPECIALIX_TYPE_NORMAL) *tty->termios = port->normal_termios; else *tty->termios = port->callout_termios; save_flags(flags); cli(); sx_change_speed(bp, port); restore_flags(flags); } port->session = current->session; port->pgrp = current->pgrp; return 0; } static void sx_close(struct tty_struct * tty, struct file * filp) { struct specialix_port *port = (struct specialix_port *) tty->driver_data; struct specialix_board *bp; unsigned long flags; unsigned long timeout; if (!port || sx_paranoia_check(port, tty->device, "close")) return; save_flags(flags); cli(); if (tty_hung_up_p(filp)) { restore_flags(flags); return; } bp = port_Board(port); if ((tty->count == 1) && (port->count != 1)) { printk(KERN_ERR "sx%d: sx_close: bad port count;" " tty->count is 1, port count is %d\n", board_No(bp), port->count); port->count = 1; } if (--port->count < 0) { printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n", board_No(bp), port_No(port), port->count); port->count = 0; } if (port->count) { restore_flags(flags); return; } port->flags |= ASYNC_CLOSING; /* * Save the termios structure, since this port may have * separate termios for callout and dialin. */ if (port->flags & ASYNC_NORMAL_ACTIVE) port->normal_termios = *tty->termios; if (port->flags & ASYNC_CALLOUT_ACTIVE) port->callout_termios = *tty->termios; /* * Now we wait for the transmit buffer to clear; and we notify * the line discipline to only process XON/XOFF characters. */ tty->closing = 1; if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) tty_wait_until_sent(tty, port->closing_wait); /* * At this point we stop accepting input. To do this, we * disable the receive line status interrupts, and tell the * interrupt driver to stop checking the data ready bit in the * line status register. */ port->IER &= ~IER_RXD; if (port->flags & ASYNC_INITIALIZED) { port->IER &= ~IER_TXRDY; port->IER |= IER_TXEMPTY; sx_out(bp, CD186x_CAR, port_No(port)); sx_out(bp, CD186x_IER, port->IER); /* * Before we drop DTR, make sure the UART transmitter * has completely drained; this is especially * important if there is a transmit FIFO! */ timeout = jiffies+HZ; while(port->IER & IER_TXEMPTY) { current->state = TASK_INTERRUPTIBLE; current->timeout = jiffies + port->timeout; schedule(); if (jiffies > timeout) { printk (KERN_INFO "Timeout waiting for close\n"); break; } } } sx_shutdown_port(bp, port); if (tty->driver.flush_buffer) tty->driver.flush_buffer(tty); if (tty->ldisc.flush_buffer) tty->ldisc.flush_buffer(tty); tty->closing = 0; port->event = 0; port->tty = 0; if (port->blocked_open) { if (port->close_delay) { current->state = TASK_INTERRUPTIBLE; current->timeout = jiffies + port->close_delay; schedule(); } wake_up_interruptible(&port->open_wait); } port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE| ASYNC_CLOSING); wake_up_interruptible(&port->close_wait); restore_flags(flags); } static int sx_write(struct tty_struct * tty, int from_user, const unsigned char *buf, int count) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; struct specialix_board *bp; int c, total = 0; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_write")) return 0; bp = port_Board(port); if (!tty || !port->xmit_buf || !tmp_buf) return 0; if (from_user) down(&tmp_buf_sem); save_flags(flags); while (1) { cli(); c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, SERIAL_XMIT_SIZE - port->xmit_head)); if (c <= 0) break; if (from_user) { copy_from_user(tmp_buf, buf, c); c = MIN(c, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, SERIAL_XMIT_SIZE - port->xmit_head)); memcpy(port->xmit_buf + port->xmit_head, tmp_buf, c); } else memcpy(port->xmit_buf + port->xmit_head, buf, c); port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); port->xmit_cnt += c; restore_flags(flags); buf += c; count -= c; total += c; } if (from_user) up(&tmp_buf_sem); if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && !(port->IER & IER_TXRDY)) { port->IER |= IER_TXRDY; sx_out(bp, CD186x_CAR, port_No(port)); sx_out(bp, CD186x_IER, port->IER); } restore_flags(flags); return total; } static void sx_put_char(struct tty_struct * tty, unsigned char ch) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_put_char")) return; if (!tty || !port->xmit_buf) return; save_flags(flags); cli(); if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { restore_flags(flags); return; } port->xmit_buf[port->xmit_head++] = ch; port->xmit_head &= SERIAL_XMIT_SIZE - 1; port->xmit_cnt++; restore_flags(flags); } static void sx_flush_chars(struct tty_struct * tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_flush_chars")) return; if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || !port->xmit_buf) return; save_flags(flags); cli(); port->IER |= IER_TXRDY; sx_out(port_Board(port), CD186x_CAR, port_No(port)); sx_out(port_Board(port), CD186x_IER, port->IER); restore_flags(flags); } static int sx_write_room(struct tty_struct * tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; int ret; if (sx_paranoia_check(port, tty->device, "sx_write_room")) return 0; ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; if (ret < 0) ret = 0; return ret; } static int sx_chars_in_buffer(struct tty_struct *tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; if (sx_paranoia_check(port, tty->device, "sx_chars_in_buffer")) return 0; return port->xmit_cnt; } static void sx_flush_buffer(struct tty_struct *tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_flush_buffer")) return; save_flags(flags); cli(); port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; restore_flags(flags); wake_up_interruptible(&tty->write_wait); if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) (tty->ldisc.write_wakeup)(tty); } static int sx_get_modem_info(struct specialix_port * port, unsigned int *value) { struct specialix_board * bp; unsigned char status; unsigned int result; unsigned long flags; bp = port_Board(port); save_flags(flags); cli(); sx_out(bp, CD186x_CAR, port_No(port)); status = sx_in(bp, CD186x_MSVR); restore_flags(flags); #ifdef DEBUG_SPECIALIX printk (KERN_DEBUG "Got msvr[%d] = %02x, car = %d.\n", port_No(port), status, sx_in (bp, CD186x_CAR)); printk (KERN_DEBUG "sx_port = %p, port = %p\n", sx_port, port); #endif if (SX_CRTSCTS(port->tty)) { result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */ | ((status & MSVR_DTR) ? TIOCM_RTS : 0) | ((status & MSVR_CD) ? TIOCM_CAR : 0) |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | ((status & MSVR_CTS) ? TIOCM_CTS : 0); } else { result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */ | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | ((status & MSVR_CD) ? TIOCM_CAR : 0) |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | ((status & MSVR_CTS) ? TIOCM_CTS : 0); } put_user(result,(unsigned long *) value); return 0; } static int sx_set_modem_info(struct specialix_port * port, unsigned int cmd, unsigned int *value) { int error; unsigned int arg; unsigned long flags; struct specialix_board *bp = port_Board(port); error = verify_area(VERIFY_READ, value, sizeof(int)); if (error) return error; Get_user(arg, (unsigned long *) value); switch (cmd) { case TIOCMBIS: /* if (arg & TIOCM_RTS) port->MSVR |= MSVR_RTS; */ /* if (arg & TIOCM_DTR) port->MSVR |= MSVR_DTR; */ if (SX_CRTSCTS(port->tty)) { if (arg & TIOCM_RTS) port->MSVR |= MSVR_DTR; } else { if (arg & TIOCM_DTR) port->MSVR |= MSVR_DTR; } break; case TIOCMBIC: /* if (arg & TIOCM_RTS) port->MSVR &= ~MSVR_RTS; */ /* if (arg & TIOCM_DTR) port->MSVR &= ~MSVR_DTR; */ if (SX_CRTSCTS(port->tty)) { if (arg & TIOCM_RTS) port->MSVR &= ~MSVR_DTR; } else { if (arg & TIOCM_DTR) port->MSVR &= ~MSVR_DTR; } break; case TIOCMSET: /* port->MSVR = (arg & TIOCM_RTS) ? (port->MSVR | MSVR_RTS) : (port->MSVR & ~MSVR_RTS); */ /* port->MSVR = (arg & TIOCM_DTR) ? (port->MSVR | MSVR_DTR) : (port->MSVR & ~MSVR_DTR); */ if (SX_CRTSCTS(port->tty)) { port->MSVR = (arg & TIOCM_RTS) ? (port->MSVR | MSVR_DTR) : (port->MSVR & ~MSVR_DTR); } else { port->MSVR = (arg & TIOCM_DTR) ? (port->MSVR | MSVR_DTR): (port->MSVR & ~MSVR_DTR); } break; default: return -EINVAL; } save_flags(flags); cli(); sx_out(bp, CD186x_CAR, port_No(port)); sx_out(bp, CD186x_MSVR, port->MSVR); restore_flags(flags); return 0; } extern inline void sx_send_break(struct specialix_port * port, unsigned long length) { struct specialix_board *bp = port_Board(port); unsigned long flags; save_flags(flags); cli(); port->break_length = SPECIALIX_TPS / HZ * length; port->COR2 |= COR2_ETC; port->IER |= IER_TXRDY; sx_out(bp, CD186x_CAR, port_No(port)); sx_out(bp, CD186x_COR2, port->COR2); sx_out(bp, CD186x_IER, port->IER); sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_CORCHG2); sx_wait_CCR(bp); restore_flags(flags); } extern inline int sx_set_serial_info(struct specialix_port * port, struct serial_struct * newinfo) { struct serial_struct tmp; struct specialix_board *bp = port_Board(port); int change_speed; unsigned long flags; int error; error = verify_area(VERIFY_READ, (void *) newinfo, sizeof(tmp)); if (error) return error; copy_from_user(&tmp, newinfo, sizeof(tmp)); #if 0 if ((tmp.irq != bp->irq) || (tmp.port != bp->base) || (tmp.type != PORT_CIRRUS) || (tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) || (tmp.custom_divisor != 0) || (tmp.xmit_fifo_size != CD186x_NFIFO) || (tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) return -EINVAL; #endif change_speed = ((port->flags & ASYNC_SPD_MASK) != (tmp.flags & ASYNC_SPD_MASK)); if (!suser()) { if ((tmp.close_delay != port->close_delay) || (tmp.closing_wait != port->closing_wait) || ((tmp.flags & ~ASYNC_USR_MASK) != (port->flags & ~ASYNC_USR_MASK))) return -EPERM; port->flags = ((port->flags & ~ASYNC_USR_MASK) | (tmp.flags & ASYNC_USR_MASK)); } else { port->flags = ((port->flags & ~ASYNC_FLAGS) | (tmp.flags & ASYNC_FLAGS)); port->close_delay = tmp.close_delay; port->closing_wait = tmp.closing_wait; } if (change_speed) { save_flags(flags); cli(); sx_change_speed(bp, port); restore_flags(flags); } return 0; } extern inline int sx_get_serial_info(struct specialix_port * port, struct serial_struct * retinfo) { struct serial_struct tmp; struct specialix_board *bp = port_Board(port); int error; error = verify_area(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)); if (error) return error; memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_CIRRUS; tmp.line = port - sx_port; tmp.port = bp->base; tmp.irq = bp->irq; tmp.flags = port->flags; tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; tmp.close_delay = port->close_delay * HZ/100; tmp.closing_wait = port->closing_wait * HZ/100; tmp.xmit_fifo_size = CD186x_NFIFO; copy_to_user(retinfo, &tmp, sizeof(tmp)); return 0; } static int sx_ioctl(struct tty_struct * tty, struct file * filp, unsigned int cmd, unsigned long arg) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; int error; int retval; if (sx_paranoia_check(port, tty->device, "sx_ioctl")) return -ENODEV; switch (cmd) { case TCSBRK: /* SVID version: non-zero arg --> no break */ retval = tty_check_change(tty); if (retval) return retval; tty_wait_until_sent(tty, 0); if (!arg) sx_send_break(port, HZ/4); /* 1/4 second */ return 0; case TCSBRKP: /* support for POSIX tcsendbreak() */ retval = tty_check_change(tty); if (retval) return retval; tty_wait_until_sent(tty, 0); sx_send_break(port, arg ? arg*(HZ/10) : HZ/4); return 0; case TIOCGSOFTCAR: error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long)); if (error) return error; put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg); return 0; case TIOCSSOFTCAR: Get_user(arg, (unsigned long *) arg); tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); return 0; case TIOCMGET: error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned int)); if (error) return error; return sx_get_modem_info(port, (unsigned int *) arg); case TIOCMBIS: case TIOCMBIC: case TIOCMSET: return sx_set_modem_info(port, cmd, (unsigned int *) arg); case TIOCGSERIAL: return sx_get_serial_info(port, (struct serial_struct *) arg); case TIOCSSERIAL: return sx_set_serial_info(port, (struct serial_struct *) arg); default: return -ENOIOCTLCMD; } return 0; } static void sx_throttle(struct tty_struct * tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; struct specialix_board *bp; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_throttle")) return; bp = port_Board(port); save_flags(flags); cli(); /* Use DTR instead of RTS ! */ if (SX_CRTSCTS (tty)) port->MSVR &= ~MSVR_DTR; else { /* Auch!!! I think the system shouldn't call this then. */ /* Or maybe we're supposed (allowed?) to do our side of hw handshake anyway, even when hardware handshake is off. When you see this in your logs, please report.... */ printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n", port_No (port)); } sx_out(bp, CD186x_CAR, port_No(port)); if (I_IXOFF(tty)) { sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_SSCH2); sx_wait_CCR(bp); } sx_out(bp, CD186x_MSVR, port->MSVR); restore_flags(flags); } static void sx_unthrottle(struct tty_struct * tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; struct specialix_board *bp; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_unthrottle")) return; bp = port_Board(port); save_flags(flags); cli(); /* XXXX Use DTR INSTEAD???? */ if (SX_CRTSCTS(tty)) { port->MSVR |= MSVR_DTR; } /* Else clause: see remark in "sx_throttle"... */ sx_out(bp, CD186x_CAR, port_No(port)); if (I_IXOFF(tty)) { sx_wait_CCR(bp); sx_out(bp, CD186x_CCR, CCR_SSCH1); sx_wait_CCR(bp); } sx_out(bp, CD186x_MSVR, port->MSVR); restore_flags(flags); } static void sx_stop(struct tty_struct * tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; struct specialix_board *bp; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_stop")) return; bp = port_Board(port); save_flags(flags); cli(); port->IER &= ~IER_TXRDY; sx_out(bp, CD186x_CAR, port_No(port)); sx_out(bp, CD186x_IER, port->IER); restore_flags(flags); } static void sx_start(struct tty_struct * tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; struct specialix_board *bp; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_start")) return; bp = port_Board(port); save_flags(flags); cli(); if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { port->IER |= IER_TXRDY; sx_out(bp, CD186x_CAR, port_No(port)); sx_out(bp, CD186x_IER, port->IER); } restore_flags(flags); } /* * This routine is called from the scheduler tqueue when the interrupt * routine has signalled that a hangup has occurred. The path of * hangup processing is: * * serial interrupt routine -> (scheduler tqueue) -> * do_sx_hangup() -> tty->hangup() -> sx_hangup() * */ static void do_sx_hangup(void *private_) { struct specialix_port *port = (struct specialix_port *) private_; struct tty_struct *tty; tty = port->tty; if (!tty) return; tty_hangup(tty); } static void sx_hangup(struct tty_struct * tty) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; struct specialix_board *bp; if (sx_paranoia_check(port, tty->device, "sx_hangup")) return; bp = port_Board(port); sx_shutdown_port(bp, port); port->event = 0; port->count = 0; port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE); port->tty = 0; wake_up_interruptible(&port->open_wait); } static void sx_set_termios(struct tty_struct * tty, struct termios * old_termios) { struct specialix_port *port = (struct specialix_port *)tty->driver_data; unsigned long flags; if (sx_paranoia_check(port, tty->device, "sx_set_termios")) return; if (tty->termios->c_cflag == old_termios->c_cflag && tty->termios->c_iflag == old_termios->c_iflag) return; save_flags(flags); cli(); sx_change_speed(port_Board(port), port); restore_flags(flags); if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) { tty->hw_stopped = 0; sx_start(tty); } } static void do_specialix_bh(void) { run_task_queue(&tq_specialix); } static void do_softint(void *private_) { struct specialix_port *port = (struct specialix_port *) private_; struct tty_struct *tty; if(!(tty = port->tty)) return; if (clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) (tty->ldisc.write_wakeup)(tty); wake_up_interruptible(&tty->write_wait); } } static int sx_init_drivers(void) { int error; int i; if (!(tmp_buf = (unsigned char *) get_free_page(GFP_KERNEL))) { printk(KERN_ERR "sx: Couldn't get free page.\n"); return 1; } init_bh(SPECIALIX_BH, do_specialix_bh); memset(&specialix_driver, 0, sizeof(specialix_driver)); specialix_driver.magic = TTY_DRIVER_MAGIC; specialix_driver.name = "ttyW"; specialix_driver.major = SPECIALIX_NORMAL_MAJOR; specialix_driver.num = SX_NBOARD * SX_NPORT; specialix_driver.type = TTY_DRIVER_TYPE_SERIAL; specialix_driver.subtype = SPECIALIX_TYPE_NORMAL; specialix_driver.init_termios = tty_std_termios; specialix_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; specialix_driver.flags = TTY_DRIVER_REAL_RAW; specialix_driver.refcount = &specialix_refcount; specialix_driver.table = specialix_table; specialix_driver.termios = specialix_termios; specialix_driver.termios_locked = specialix_termios_locked; specialix_driver.open = sx_open; specialix_driver.close = sx_close; specialix_driver.write = sx_write; specialix_driver.put_char = sx_put_char; specialix_driver.flush_chars = sx_flush_chars; specialix_driver.write_room = sx_write_room; specialix_driver.chars_in_buffer = sx_chars_in_buffer; specialix_driver.flush_buffer = sx_flush_buffer; specialix_driver.ioctl = sx_ioctl; specialix_driver.throttle = sx_throttle; specialix_driver.unthrottle = sx_unthrottle; specialix_driver.set_termios = sx_set_termios; specialix_driver.stop = sx_stop; specialix_driver.start = sx_start; specialix_driver.hangup = sx_hangup; specialix_callout_driver = specialix_driver; specialix_callout_driver.name = "cuw"; specialix_callout_driver.major = SPECIALIX_CALLOUT_MAJOR; specialix_callout_driver.subtype = SPECIALIX_TYPE_CALLOUT; if ((error = tty_register_driver(&specialix_driver))) { free_page((unsigned long)tmp_buf); printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n", error); return 1; } if ((error = tty_register_driver(&specialix_callout_driver))) { free_page((unsigned long)tmp_buf); tty_unregister_driver(&specialix_driver); printk(KERN_ERR "sx: Couldn't register specialix IO8+ callout driver, error = %d\n", error); return 1; } memset(sx_port, 0, sizeof(sx_port)); for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { sx_port[i].callout_termios = specialix_callout_driver.init_termios; sx_port[i].normal_termios = specialix_driver.init_termios; sx_port[i].magic = SPECIALIX_MAGIC; sx_port[i].tqueue.routine = do_softint; sx_port[i].tqueue.data = &sx_port[i]; sx_port[i].tqueue_hangup.routine = do_sx_hangup; sx_port[i].tqueue_hangup.data = &sx_port[i]; sx_port[i].close_delay = 50 * HZ/100; sx_port[i].closing_wait = 3000 * HZ/100; } return 0; } static void sx_release_drivers(void) { free_page((unsigned long)tmp_buf); tty_unregister_driver(&specialix_driver); tty_unregister_driver(&specialix_callout_driver); } #ifndef MODULE /* * Called at boot time. * * You can specify IO base for up to SX_NBOARD cards, * using line "specialix=0xiobase1,0xiobase2,.." at LILO prompt. * Note that there will be no probing at default * addresses in this case. * */ void specialix_setup(char *str, int * ints) { int i; for (i=0;i<SX_NBOARD;i++) { sx_board[i].base = 0; } for (i = 1; i <= ints[0]; i++) { if (i&1) sx_board[i/2].base = ints[i]; else sx_board[i/2 -1].irq = ints[i]; } } #endif /* * This routine must be called by kernel at boot time */ int specialix_init(void) { int i; int found = 0; #ifdef CONFIG_PCI int pci_index; unsigned char pci_bus, pci_device_fn; #endif printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); #ifdef CONFIG_SPECIALIX_RTSCTS printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); #else printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); #endif if (sx_init_drivers()) return -EIO; for (i = 0; i < SX_NBOARD; i++) if (sx_board[i].base && !sx_probe(&sx_board[i])) found++; #ifdef CONFIG_PCI i=0; pci_index = 0; while ((i < SX_NBOARD) && (pci_index < 0xff)) { unsigned char tbyte; unsigned int tint; if (sx_board[i].flags & SX_BOARD_PRESENT) { i++; continue; } if (pcibios_find_device (PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_IO8, pci_index, &pci_bus, &pci_device_fn) != PCIBIOS_SUCCESSFUL) break; pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_INTERRUPT_LINE, &tbyte); sx_board[i].irq = tbyte; pcibios_read_config_dword(pci_bus, pci_device_fn, PCI_BASE_ADDRESS_2, &tint); /* Mask out the fact that it's IO-space */ sx_board[i].base = tint & PCI_BASE_ADDRESS_IO_MASK; sx_board[i].flags |= SX_BOARD_IS_PCI; if (!sx_probe(&sx_board[i])) found ++; pci_index++; } #endif if (!found) { sx_release_drivers(); printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); return -EIO; } return 0; } #ifdef MODULE int iobase[SX_NBOARD] = {0,}; int irq [SX_NBOARD] = {0,}; /* * You can setup up to 4 boards. * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. * You should specify the IRQs too in that case "irq=....,...". * * More than 4 boards in one computer is not possible, as the card can * only use 4 different interrupts. * */ int init_module(void) { int i; if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { for(i = 0; i < SX_NBOARD; i++) { sx_board[i].base = iobase[i]; sx_board[i].irq = irq[i]; } } return specialix_init(); } void cleanup_module(void) { int i; sx_release_drivers(); for (i = 0; i < SX_NBOARD; i++) if (sx_board[i].flags & SX_BOARD_PRESENT) sx_release_io_range(&sx_board[i]); #ifdef SPECIALIX_TIMER del_timer (&missed_irq_timer); #endif } #endif /* MODULE */
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