2 * Simulated Serial Driver (fake serial)
4 * This driver is mostly used for bringup purposes and will go away.
5 * It has a strong dependency on the system console. All outputs
6 * are rerouted to the same facility as the one used by printk which, in our
7 * case means sys_sim.c console (goes via the simulator). The code hereafter
8 * is completely leveraged from the serial.c driver.
10 * Copyright (C) 1999-2000, 2002-2003 Hewlett-Packard Co
11 * Stephane Eranian <eranian@hpl.hp.com>
12 * David Mosberger-Tang <davidm@hpl.hp.com>
14 * 02/04/00 D. Mosberger Merged in serial.c bug fixes in rs_close().
15 * 02/25/00 D. Mosberger Synced up with 2.3.99pre-5 version of serial.c.
16 * 07/30/02 D. Mosberger Replace sti()/cli() with explicit spinlocks & local irq masking
19 #include <linux/config.h>
20 #include <linux/init.h>
21 #include <linux/errno.h>
22 #include <linux/sched.h>
23 #include <linux/tty.h>
24 #include <linux/tty_flip.h>
25 #include <linux/major.h>
26 #include <linux/fcntl.h>
28 #include <linux/slab.h>
29 #include <linux/capability.h>
30 #include <linux/console.h>
31 #include <linux/module.h>
32 #include <linux/serial.h>
33 #include <linux/serialP.h>
34 #include <linux/sysrq.h>
37 #include <asm/hw_irq.h>
38 #include <asm/uaccess.h>
41 # include <linux/kdb.h>
44 #undef SIMSERIAL_DEBUG /* define this to get some debug information */
46 #define KEYBOARD_INTR 3 /* must match with simulator! */
48 #define NR_PORTS 1 /* only one port for now */
49 #define SERIAL_INLINE 1
52 #define _INLINE_ inline
55 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
57 #define SSC_GETCHAR 21
59 extern long ia64_ssc (long, long, long, long, int);
60 extern void ia64_ssc_connect_irq (long intr, long irq);
62 static char *serial_name = "SimSerial driver";
63 static char *serial_version = "0.6";
66 * This has been extracted from asm/serial.h. We need one eventually but
67 * I don't know exactly what we're going to put in it so just fake one
70 #define BASE_BAUD ( 1843200 / 16 )
72 #define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
75 * Most of the values here are meaningless to this particular driver.
76 * However some values must be preserved for the code (leveraged from serial.c
79 * type must not be UNKNOWN
80 * So I picked arbitrary (guess from where?) values instead
82 static struct serial_state rs_table[NR_PORTS]={
83 /* UART CLK PORT IRQ FLAGS */
84 { 0, BASE_BAUD, 0x3F8, 0, STD_COM_FLAGS,0,PORT_16550 } /* ttyS0 */
88 * Just for the fun of it !
90 static struct serial_uart_config uart_config[] = {
95 { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
97 { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH },
98 { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO |
100 { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO},
104 struct tty_driver *hp_simserial_driver;
106 static struct async_struct *IRQ_ports[NR_IRQS];
108 static struct console *console;
110 static unsigned char *tmp_buf;
111 static DECLARE_MUTEX(tmp_buf_sem);
113 extern struct console *console_drivers; /* from kernel/printk.c */
116 * ------------------------------------------------------------
117 * rs_stop() and rs_start()
119 * This routines are called before setting or resetting tty->stopped.
120 * They enable or disable transmitter interrupts, as necessary.
121 * ------------------------------------------------------------
123 static void rs_stop(struct tty_struct *tty)
125 #ifdef SIMSERIAL_DEBUG
126 printk("rs_stop: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
127 tty->stopped, tty->hw_stopped, tty->flow_stopped);
132 static void rs_start(struct tty_struct *tty)
134 #ifdef SIMSERIAL_DEBUG
135 printk("rs_start: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
136 tty->stopped, tty->hw_stopped, tty->flow_stopped);
140 static void receive_chars(struct tty_struct *tty, struct pt_regs *regs)
143 static unsigned char seen_esc = 0;
145 while ( (ch = ia64_ssc(0, 0, 0, 0, SSC_GETCHAR)) ) {
146 if ( ch == 27 && seen_esc == 0 ) {
150 if ( seen_esc==1 && ch == 'O' ) {
153 } else if ( seen_esc == 2 ) {
154 if ( ch == 'P' ) /* F1 */
156 #ifdef CONFIG_MAGIC_SYSRQ
157 if ( ch == 'S' ) { /* F4 */
159 ch = ia64_ssc(0, 0, 0, 0,
162 handle_sysrq(ch, regs, NULL);
170 if (tty->flip.count >= TTY_FLIPBUF_SIZE) break;
172 *tty->flip.char_buf_ptr = ch;
174 *tty->flip.flag_buf_ptr = 0;
176 tty->flip.flag_buf_ptr++;
177 tty->flip.char_buf_ptr++;
180 tty_flip_buffer_push(tty);
184 * This is the serial driver's interrupt routine for a single port
186 static irqreturn_t rs_interrupt_single(int irq, void *dev_id, struct pt_regs * regs)
188 struct async_struct * info;
191 * I don't know exactly why they don't use the dev_id opaque data
192 * pointer instead of this extra lookup table
194 info = IRQ_ports[irq];
195 if (!info || !info->tty) {
196 printk(KERN_INFO "simrs_interrupt_single: info|tty=0 info=%p problem\n", info);
200 * pretty simple in our case, because we only get interrupts
203 receive_chars(info->tty, regs);
208 * -------------------------------------------------------------------
209 * Here ends the serial interrupt routines.
210 * -------------------------------------------------------------------
215 * not really used in our situation so keep them commented out for now
217 static DECLARE_TASK_QUEUE(tq_serial); /* used to be at the top of the file */
218 static void do_serial_bh(void)
220 run_task_queue(&tq_serial);
221 printk(KERN_ERR "do_serial_bh: called\n");
225 static void do_softint(void *private_)
227 printk(KERN_ERR "simserial: do_softint called\n");
230 static void rs_put_char(struct tty_struct *tty, unsigned char ch)
232 struct async_struct *info = (struct async_struct *)tty->driver_data;
235 if (!tty || !info->xmit.buf) return;
237 local_irq_save(flags);
238 if (CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) == 0) {
239 local_irq_restore(flags);
242 info->xmit.buf[info->xmit.head] = ch;
243 info->xmit.head = (info->xmit.head + 1) & (SERIAL_XMIT_SIZE-1);
244 local_irq_restore(flags);
247 static _INLINE_ void transmit_chars(struct async_struct *info, int *intr_done)
253 local_irq_save(flags);
256 char c = info->x_char;
258 console->write(console, &c, 1);
260 info->state->icount.tx++;
266 if (info->xmit.head == info->xmit.tail || info->tty->stopped || info->tty->hw_stopped) {
267 #ifdef SIMSERIAL_DEBUG
268 printk("transmit_chars: head=%d, tail=%d, stopped=%d\n",
269 info->xmit.head, info->xmit.tail, info->tty->stopped);
274 * We removed the loop and try to do it in to chunks. We need
275 * 2 operations maximum because it's a ring buffer.
277 * First from current to tail if possible.
278 * Then from the beginning of the buffer until necessary
281 count = min(CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE),
282 SERIAL_XMIT_SIZE - info->xmit.tail);
283 console->write(console, info->xmit.buf+info->xmit.tail, count);
285 info->xmit.tail = (info->xmit.tail+count) & (SERIAL_XMIT_SIZE-1);
288 * We have more at the beginning of the buffer
290 count = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
292 console->write(console, info->xmit.buf, count);
293 info->xmit.tail += count;
296 local_irq_restore(flags);
299 static void rs_flush_chars(struct tty_struct *tty)
301 struct async_struct *info = (struct async_struct *)tty->driver_data;
303 if (info->xmit.head == info->xmit.tail || tty->stopped || tty->hw_stopped ||
307 transmit_chars(info, NULL);
311 static int rs_write(struct tty_struct * tty,
312 const unsigned char *buf, int count)
315 struct async_struct *info = (struct async_struct *)tty->driver_data;
318 if (!tty || !info->xmit.buf || !tmp_buf) return 0;
320 local_irq_save(flags);
322 c = CIRC_SPACE_TO_END(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
328 memcpy(info->xmit.buf + info->xmit.head, buf, c);
329 info->xmit.head = ((info->xmit.head + c) &
330 (SERIAL_XMIT_SIZE-1));
335 local_irq_restore(flags);
337 * Hey, we transmit directly from here in our case
339 if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE)
340 && !tty->stopped && !tty->hw_stopped) {
341 transmit_chars(info, NULL);
346 static int rs_write_room(struct tty_struct *tty)
348 struct async_struct *info = (struct async_struct *)tty->driver_data;
350 return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
353 static int rs_chars_in_buffer(struct tty_struct *tty)
355 struct async_struct *info = (struct async_struct *)tty->driver_data;
357 return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
360 static void rs_flush_buffer(struct tty_struct *tty)
362 struct async_struct *info = (struct async_struct *)tty->driver_data;
365 local_irq_save(flags);
366 info->xmit.head = info->xmit.tail = 0;
367 local_irq_restore(flags);
369 wake_up_interruptible(&tty->write_wait);
371 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
372 tty->ldisc.write_wakeup)
373 (tty->ldisc.write_wakeup)(tty);
377 * This function is used to send a high-priority XON/XOFF character to
380 static void rs_send_xchar(struct tty_struct *tty, char ch)
382 struct async_struct *info = (struct async_struct *)tty->driver_data;
387 * I guess we could call console->write() directly but
388 * let's do that for now.
390 transmit_chars(info, NULL);
395 * ------------------------------------------------------------
398 * This routine is called by the upper-layer tty layer to signal that
399 * incoming characters should be throttled.
400 * ------------------------------------------------------------
402 static void rs_throttle(struct tty_struct * tty)
404 if (I_IXOFF(tty)) rs_send_xchar(tty, STOP_CHAR(tty));
406 printk(KERN_INFO "simrs_throttle called\n");
409 static void rs_unthrottle(struct tty_struct * tty)
411 struct async_struct *info = (struct async_struct *)tty->driver_data;
417 rs_send_xchar(tty, START_CHAR(tty));
419 printk(KERN_INFO "simrs_unthrottle called\n");
423 * rs_break() --- routine which turns the break handling on or off
425 static void rs_break(struct tty_struct *tty, int break_state)
429 static int rs_ioctl(struct tty_struct *tty, struct file * file,
430 unsigned int cmd, unsigned long arg)
432 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
433 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
434 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
435 if (tty->flags & (1 << TTY_IO_ERROR))
441 printk(KERN_INFO "rs_ioctl: TIOCMGET called\n");
446 printk(KERN_INFO "rs_ioctl: TIOCMBIS/BIC/SET called\n");
449 printk(KERN_INFO "simrs_ioctl TIOCGSERIAL called\n");
452 printk(KERN_INFO "simrs_ioctl TIOCSSERIAL called\n");
455 printk(KERN_INFO "rs_ioctl: TIOCSERCONFIG called\n");
458 case TIOCSERGETLSR: /* Get line status register */
459 printk(KERN_INFO "rs_ioctl: TIOCSERGETLSR called\n");
463 printk(KERN_INFO "rs_ioctl: TIOCSERGSTRUCT called\n");
465 if (copy_to_user((struct async_struct *) arg,
466 info, sizeof(struct async_struct)))
472 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
473 * - mask passed in arg for lines of interest
474 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
475 * Caller should use TIOCGICOUNT to see which one it was
478 printk(KERN_INFO "rs_ioctl: TIOCMIWAIT: called\n");
481 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
482 * Return: write counters to the user passed counter struct
483 * NB: both 1->0 and 0->1 transitions are counted except for
484 * RI where only 0->1 is counted.
487 printk(KERN_INFO "rs_ioctl: TIOCGICOUNT called\n");
492 /* "setserial -W" is called in Debian boot */
493 printk (KERN_INFO "TIOCSER?WILD ioctl obsolete, ignored.\n");
502 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
504 static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
506 unsigned int cflag = tty->termios->c_cflag;
508 if ( (cflag == old_termios->c_cflag)
509 && ( RELEVANT_IFLAG(tty->termios->c_iflag)
510 == RELEVANT_IFLAG(old_termios->c_iflag)))
514 /* Handle turning off CRTSCTS */
515 if ((old_termios->c_cflag & CRTSCTS) &&
516 !(tty->termios->c_cflag & CRTSCTS)) {
522 * This routine will shutdown a serial port; interrupts are disabled, and
523 * DTR is dropped if the hangup on close termio flag is on.
525 static void shutdown(struct async_struct * info)
528 struct serial_state *state;
531 if (!(info->flags & ASYNC_INITIALIZED)) return;
535 #ifdef SIMSERIAL_DEBUG
536 printk("Shutting down serial port %d (irq %d)....", info->line,
540 local_irq_save(flags);
543 * First unlink the serial port from the IRQ chain...
546 info->next_port->prev_port = info->prev_port;
548 info->prev_port->next_port = info->next_port;
550 IRQ_ports[state->irq] = info->next_port;
553 * Free the IRQ, if necessary
555 if (state->irq && (!IRQ_ports[state->irq] ||
556 !IRQ_ports[state->irq]->next_port)) {
557 if (IRQ_ports[state->irq]) {
558 free_irq(state->irq, NULL);
559 retval = request_irq(state->irq, rs_interrupt_single,
560 IRQ_T(info), "serial", NULL);
563 printk(KERN_ERR "serial shutdown: request_irq: error %d"
564 " Couldn't reacquire IRQ.\n", retval);
566 free_irq(state->irq, NULL);
569 if (info->xmit.buf) {
570 free_page((unsigned long) info->xmit.buf);
574 if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);
576 info->flags &= ~ASYNC_INITIALIZED;
578 local_irq_restore(flags);
582 * ------------------------------------------------------------
585 * This routine is called when the serial port gets closed. First, we
586 * wait for the last remaining data to be sent. Then, we unlink its
587 * async structure from the interrupt chain if necessary, and we free
588 * that IRQ if nothing is left in the chain.
589 * ------------------------------------------------------------
591 static void rs_close(struct tty_struct *tty, struct file * filp)
593 struct async_struct * info = (struct async_struct *)tty->driver_data;
594 struct serial_state *state;
601 local_irq_save(flags);
602 if (tty_hung_up_p(filp)) {
603 #ifdef SIMSERIAL_DEBUG
604 printk("rs_close: hung_up\n");
606 local_irq_restore(flags);
609 #ifdef SIMSERIAL_DEBUG
610 printk("rs_close ttys%d, count = %d\n", info->line, state->count);
612 if ((tty->count == 1) && (state->count != 1)) {
614 * Uh, oh. tty->count is 1, which means that the tty
615 * structure will be freed. state->count should always
616 * be one in these conditions. If it's greater than
617 * one, we've got real problems, since it means the
618 * serial port won't be shutdown.
620 printk(KERN_ERR "rs_close: bad serial port count; tty->count is 1, "
621 "state->count is %d\n", state->count);
624 if (--state->count < 0) {
625 printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
626 info->line, state->count);
630 local_irq_restore(flags);
633 info->flags |= ASYNC_CLOSING;
634 local_irq_restore(flags);
637 * Now we wait for the transmit buffer to clear; and we notify
638 * the line discipline to only process XON/XOFF characters.
641 if (tty->driver->flush_buffer) tty->driver->flush_buffer(tty);
642 if (tty->ldisc.flush_buffer) tty->ldisc.flush_buffer(tty);
645 if (info->blocked_open) {
646 if (info->close_delay)
647 schedule_timeout_interruptible(info->close_delay);
648 wake_up_interruptible(&info->open_wait);
650 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
651 wake_up_interruptible(&info->close_wait);
655 * rs_wait_until_sent() --- wait until the transmitter is empty
657 static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
663 * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
665 static void rs_hangup(struct tty_struct *tty)
667 struct async_struct * info = (struct async_struct *)tty->driver_data;
668 struct serial_state *state = info->state;
670 #ifdef SIMSERIAL_DEBUG
671 printk("rs_hangup: called\n");
676 rs_flush_buffer(tty);
677 if (info->flags & ASYNC_CLOSING)
683 info->flags &= ~ASYNC_NORMAL_ACTIVE;
685 wake_up_interruptible(&info->open_wait);
689 static int get_async_struct(int line, struct async_struct **ret_info)
691 struct async_struct *info;
692 struct serial_state *sstate;
694 sstate = rs_table + line;
697 *ret_info = sstate->info;
700 info = kmalloc(sizeof(struct async_struct), GFP_KERNEL);
705 memset(info, 0, sizeof(struct async_struct));
706 init_waitqueue_head(&info->open_wait);
707 init_waitqueue_head(&info->close_wait);
708 init_waitqueue_head(&info->delta_msr_wait);
709 info->magic = SERIAL_MAGIC;
710 info->port = sstate->port;
711 info->flags = sstate->flags;
712 info->xmit_fifo_size = sstate->xmit_fifo_size;
714 INIT_WORK(&info->work, do_softint, info);
715 info->state = sstate;
718 *ret_info = sstate->info;
721 *ret_info = sstate->info = info;
726 startup(struct async_struct *info)
730 irqreturn_t (*handler)(int, void *, struct pt_regs *);
731 struct serial_state *state= info->state;
734 page = get_zeroed_page(GFP_KERNEL);
738 local_irq_save(flags);
740 if (info->flags & ASYNC_INITIALIZED) {
745 if (!state->port || !state->type) {
746 if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);
753 info->xmit.buf = (unsigned char *) page;
755 #ifdef SIMSERIAL_DEBUG
756 printk("startup: ttys%d (irq %d)...", info->line, state->irq);
760 * Allocate the IRQ if necessary
762 if (state->irq && (!IRQ_ports[state->irq] ||
763 !IRQ_ports[state->irq]->next_port)) {
764 if (IRQ_ports[state->irq]) {
768 handler = rs_interrupt_single;
770 retval = request_irq(state->irq, handler, IRQ_T(info), "simserial", NULL);
772 if (capable(CAP_SYS_ADMIN)) {
774 set_bit(TTY_IO_ERROR,
783 * Insert serial port into IRQ chain.
786 info->next_port = IRQ_ports[state->irq];
788 info->next_port->prev_port = info;
789 IRQ_ports[state->irq] = info;
791 if (info->tty) clear_bit(TTY_IO_ERROR, &info->tty->flags);
793 info->xmit.head = info->xmit.tail = 0;
797 * Set up serial timers...
799 timer_table[RS_TIMER].expires = jiffies + 2*HZ/100;
800 timer_active |= 1 << RS_TIMER;
804 * Set up the tty->alt_speed kludge
807 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
808 info->tty->alt_speed = 57600;
809 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
810 info->tty->alt_speed = 115200;
811 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
812 info->tty->alt_speed = 230400;
813 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
814 info->tty->alt_speed = 460800;
817 info->flags |= ASYNC_INITIALIZED;
818 local_irq_restore(flags);
822 local_irq_restore(flags);
828 * This routine is called whenever a serial port is opened. It
829 * enables interrupts for a serial port, linking in its async structure into
830 * the IRQ chain. It also performs the serial-specific
831 * initialization for the tty structure.
833 static int rs_open(struct tty_struct *tty, struct file * filp)
835 struct async_struct *info;
840 if ((line < 0) || (line >= NR_PORTS))
842 retval = get_async_struct(line, &info);
845 tty->driver_data = info;
848 #ifdef SIMSERIAL_DEBUG
849 printk("rs_open %s, count = %d\n", tty->name, info->state->count);
851 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
854 page = get_zeroed_page(GFP_KERNEL);
860 tmp_buf = (unsigned char *) page;
864 * If the port is the middle of closing, bail out now
866 if (tty_hung_up_p(filp) ||
867 (info->flags & ASYNC_CLOSING)) {
868 if (info->flags & ASYNC_CLOSING)
869 interruptible_sleep_on(&info->close_wait);
870 #ifdef SERIAL_DO_RESTART
871 return ((info->flags & ASYNC_HUP_NOTIFY) ?
872 -EAGAIN : -ERESTARTSYS);
879 * Start up serial port
881 retval = startup(info);
887 * figure out which console to use (should be one already)
889 console = console_drivers;
891 if ((console->flags & CON_ENABLED) && console->write) break;
892 console = console->next;
895 #ifdef SIMSERIAL_DEBUG
896 printk("rs_open ttys%d successful\n", info->line);
902 * /proc fs routines....
905 static inline int line_info(char *buf, struct serial_state *state)
907 return sprintf(buf, "%d: uart:%s port:%lX irq:%d\n",
908 state->line, uart_config[state->type].name,
909 state->port, state->irq);
912 static int rs_read_proc(char *page, char **start, off_t off, int count,
913 int *eof, void *data)
918 len += sprintf(page, "simserinfo:1.0 driver:%s\n", serial_version);
919 for (i = 0; i < NR_PORTS && len < 4000; i++) {
920 l = line_info(page + len, &rs_table[i]);
922 if (len+begin > off+count)
924 if (len+begin < off) {
931 if (off >= len+begin)
933 *start = page + (begin-off);
934 return ((count < begin+len-off) ? count : begin+len-off);
938 * ---------------------------------------------------------------------
939 * rs_init() and friends
941 * rs_init() is called at boot-time to initialize the serial driver.
942 * ---------------------------------------------------------------------
946 * This routine prints out the appropriate serial driver version
947 * number, and identifies which options were configured into this
950 static inline void show_serial_version(void)
952 printk(KERN_INFO "%s version %s with", serial_name, serial_version);
953 printk(KERN_INFO " no serial options enabled\n");
956 static struct tty_operations hp_ops = {
960 .put_char = rs_put_char,
961 .flush_chars = rs_flush_chars,
962 .write_room = rs_write_room,
963 .chars_in_buffer = rs_chars_in_buffer,
964 .flush_buffer = rs_flush_buffer,
966 .throttle = rs_throttle,
967 .unthrottle = rs_unthrottle,
968 .send_xchar = rs_send_xchar,
969 .set_termios = rs_set_termios,
973 .break_ctl = rs_break,
974 .wait_until_sent = rs_wait_until_sent,
975 .read_proc = rs_read_proc,
979 * The serial driver boot-time initialization code!
985 struct serial_state *state;
987 if (!ia64_platform_is("hpsim"))
990 hp_simserial_driver = alloc_tty_driver(1);
991 if (!hp_simserial_driver)
994 show_serial_version();
996 /* Initialize the tty_driver structure */
998 hp_simserial_driver->owner = THIS_MODULE;
999 hp_simserial_driver->driver_name = "simserial";
1000 hp_simserial_driver->name = "ttyS";
1001 hp_simserial_driver->major = TTY_MAJOR;
1002 hp_simserial_driver->minor_start = 64;
1003 hp_simserial_driver->type = TTY_DRIVER_TYPE_SERIAL;
1004 hp_simserial_driver->subtype = SERIAL_TYPE_NORMAL;
1005 hp_simserial_driver->init_termios = tty_std_termios;
1006 hp_simserial_driver->init_termios.c_cflag =
1007 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1008 hp_simserial_driver->flags = TTY_DRIVER_REAL_RAW;
1009 tty_set_operations(hp_simserial_driver, &hp_ops);
1012 * Let's have a little bit of fun !
1014 for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
1016 if (state->type == PORT_UNKNOWN) continue;
1019 if ((rc = assign_irq_vector(AUTO_ASSIGN)) < 0)
1020 panic("%s: out of interrupt vectors!\n",
1023 ia64_ssc_connect_irq(KEYBOARD_INTR, state->irq);
1026 printk(KERN_INFO "ttyS%d at 0x%04lx (irq = %d) is a %s\n",
1028 state->port, state->irq,
1029 uart_config[state->type].name);
1032 if (tty_register_driver(hp_simserial_driver))
1033 panic("Couldn't register simserial driver\n");
1039 __initcall(simrs_init);