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/init.h>
20 #include <linux/errno.h>
21 #include <linux/sched.h>
22 #include <linux/tty.h>
23 #include <linux/tty_flip.h>
24 #include <linux/major.h>
25 #include <linux/fcntl.h>
27 #include <linux/seq_file.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/hpsim.h>
38 #include <asm/hw_irq.h>
39 #include <asm/uaccess.h>
41 #include "hpsim_ssc.h"
43 #undef SIMSERIAL_DEBUG /* define this to get some debug information */
45 #define KEYBOARD_INTR 3 /* must match with simulator! */
47 #define NR_PORTS 1 /* only one port for now */
49 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
51 static char *serial_name
= "SimSerial driver";
52 static char *serial_version
= "0.6";
55 * This has been extracted from asm/serial.h. We need one eventually but
56 * I don't know exactly what we're going to put in it so just fake one
59 #define BASE_BAUD ( 1843200 / 16 )
61 #define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
64 * Most of the values here are meaningless to this particular driver.
65 * However some values must be preserved for the code (leveraged from serial.c
68 * type must not be UNKNOWN
69 * So I picked arbitrary (guess from where?) values instead
71 static struct serial_state rs_table
[NR_PORTS
]={
72 /* UART CLK PORT IRQ FLAGS */
73 { 0, BASE_BAUD
, 0x3F8, 0, STD_COM_FLAGS
,0,PORT_16550
} /* ttyS0 */
77 * Just for the fun of it !
79 static struct serial_uart_config uart_config
[] = {
84 { "16550A", 16, UART_CLEAR_FIFO
| UART_USE_FIFO
},
86 { "ST16650", 1, UART_CLEAR_FIFO
| UART_STARTECH
},
87 { "ST16650V2", 32, UART_CLEAR_FIFO
| UART_USE_FIFO
|
89 { "TI16750", 64, UART_CLEAR_FIFO
| UART_USE_FIFO
},
93 struct tty_driver
*hp_simserial_driver
;
95 static struct async_struct
*IRQ_ports
[NR_IRQS
];
97 static struct console
*console
;
99 static unsigned char *tmp_buf
;
101 extern struct console
*console_drivers
; /* from kernel/printk.c */
104 * ------------------------------------------------------------
105 * rs_stop() and rs_start()
107 * This routines are called before setting or resetting tty->stopped.
108 * They enable or disable transmitter interrupts, as necessary.
109 * ------------------------------------------------------------
111 static void rs_stop(struct tty_struct
*tty
)
113 #ifdef SIMSERIAL_DEBUG
114 printk("rs_stop: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
115 tty
->stopped
, tty
->hw_stopped
, tty
->flow_stopped
);
120 static void rs_start(struct tty_struct
*tty
)
122 #ifdef SIMSERIAL_DEBUG
123 printk("rs_start: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
124 tty
->stopped
, tty
->hw_stopped
, tty
->flow_stopped
);
128 static void receive_chars(struct tty_struct
*tty
)
131 static unsigned char seen_esc
= 0;
133 while ( (ch
= ia64_ssc(0, 0, 0, 0, SSC_GETCHAR
)) ) {
134 if ( ch
== 27 && seen_esc
== 0 ) {
138 if ( seen_esc
==1 && ch
== 'O' ) {
141 } else if ( seen_esc
== 2 ) {
142 if ( ch
== 'P' ) /* F1 */
144 #ifdef CONFIG_MAGIC_SYSRQ
145 if ( ch
== 'S' ) { /* F4 */
147 ch
= ia64_ssc(0, 0, 0, 0,
159 if (tty_insert_flip_char(tty
, ch
, TTY_NORMAL
) == 0)
162 tty_flip_buffer_push(tty
);
166 * This is the serial driver's interrupt routine for a single port
168 static irqreturn_t
rs_interrupt_single(int irq
, void *dev_id
)
170 struct async_struct
* info
;
173 * I don't know exactly why they don't use the dev_id opaque data
174 * pointer instead of this extra lookup table
176 info
= IRQ_ports
[irq
];
177 if (!info
|| !info
->tty
) {
178 printk(KERN_INFO
"simrs_interrupt_single: info|tty=0 info=%p problem\n", info
);
182 * pretty simple in our case, because we only get interrupts
185 receive_chars(info
->tty
);
190 * -------------------------------------------------------------------
191 * Here ends the serial interrupt routines.
192 * -------------------------------------------------------------------
195 static void do_softint(struct work_struct
*private_
)
197 printk(KERN_ERR
"simserial: do_softint called\n");
200 static int rs_put_char(struct tty_struct
*tty
, unsigned char ch
)
202 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
205 if (!tty
|| !info
->xmit
.buf
)
208 local_irq_save(flags
);
209 if (CIRC_SPACE(info
->xmit
.head
, info
->xmit
.tail
, SERIAL_XMIT_SIZE
) == 0) {
210 local_irq_restore(flags
);
213 info
->xmit
.buf
[info
->xmit
.head
] = ch
;
214 info
->xmit
.head
= (info
->xmit
.head
+ 1) & (SERIAL_XMIT_SIZE
-1);
215 local_irq_restore(flags
);
219 static void transmit_chars(struct async_struct
*info
, int *intr_done
)
225 local_irq_save(flags
);
228 char c
= info
->x_char
;
230 console
->write(console
, &c
, 1);
232 info
->state
->icount
.tx
++;
238 if (info
->xmit
.head
== info
->xmit
.tail
|| info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
239 #ifdef SIMSERIAL_DEBUG
240 printk("transmit_chars: head=%d, tail=%d, stopped=%d\n",
241 info
->xmit
.head
, info
->xmit
.tail
, info
->tty
->stopped
);
246 * We removed the loop and try to do it in to chunks. We need
247 * 2 operations maximum because it's a ring buffer.
249 * First from current to tail if possible.
250 * Then from the beginning of the buffer until necessary
253 count
= min(CIRC_CNT(info
->xmit
.head
, info
->xmit
.tail
, SERIAL_XMIT_SIZE
),
254 SERIAL_XMIT_SIZE
- info
->xmit
.tail
);
255 console
->write(console
, info
->xmit
.buf
+info
->xmit
.tail
, count
);
257 info
->xmit
.tail
= (info
->xmit
.tail
+count
) & (SERIAL_XMIT_SIZE
-1);
260 * We have more at the beginning of the buffer
262 count
= CIRC_CNT(info
->xmit
.head
, info
->xmit
.tail
, SERIAL_XMIT_SIZE
);
264 console
->write(console
, info
->xmit
.buf
, count
);
265 info
->xmit
.tail
+= count
;
268 local_irq_restore(flags
);
271 static void rs_flush_chars(struct tty_struct
*tty
)
273 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
275 if (info
->xmit
.head
== info
->xmit
.tail
|| tty
->stopped
|| tty
->hw_stopped
||
279 transmit_chars(info
, NULL
);
283 static int rs_write(struct tty_struct
* tty
,
284 const unsigned char *buf
, int count
)
287 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
290 if (!tty
|| !info
->xmit
.buf
|| !tmp_buf
) return 0;
292 local_irq_save(flags
);
294 c
= CIRC_SPACE_TO_END(info
->xmit
.head
, info
->xmit
.tail
, SERIAL_XMIT_SIZE
);
300 memcpy(info
->xmit
.buf
+ info
->xmit
.head
, buf
, c
);
301 info
->xmit
.head
= ((info
->xmit
.head
+ c
) &
302 (SERIAL_XMIT_SIZE
-1));
307 local_irq_restore(flags
);
309 * Hey, we transmit directly from here in our case
311 if (CIRC_CNT(info
->xmit
.head
, info
->xmit
.tail
, SERIAL_XMIT_SIZE
)
312 && !tty
->stopped
&& !tty
->hw_stopped
) {
313 transmit_chars(info
, NULL
);
318 static int rs_write_room(struct tty_struct
*tty
)
320 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
322 return CIRC_SPACE(info
->xmit
.head
, info
->xmit
.tail
, SERIAL_XMIT_SIZE
);
325 static int rs_chars_in_buffer(struct tty_struct
*tty
)
327 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
329 return CIRC_CNT(info
->xmit
.head
, info
->xmit
.tail
, SERIAL_XMIT_SIZE
);
332 static void rs_flush_buffer(struct tty_struct
*tty
)
334 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
337 local_irq_save(flags
);
338 info
->xmit
.head
= info
->xmit
.tail
= 0;
339 local_irq_restore(flags
);
345 * This function is used to send a high-priority XON/XOFF character to
348 static void rs_send_xchar(struct tty_struct
*tty
, char ch
)
350 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
355 * I guess we could call console->write() directly but
356 * let's do that for now.
358 transmit_chars(info
, NULL
);
363 * ------------------------------------------------------------
366 * This routine is called by the upper-layer tty layer to signal that
367 * incoming characters should be throttled.
368 * ------------------------------------------------------------
370 static void rs_throttle(struct tty_struct
* tty
)
372 if (I_IXOFF(tty
)) rs_send_xchar(tty
, STOP_CHAR(tty
));
374 printk(KERN_INFO
"simrs_throttle called\n");
377 static void rs_unthrottle(struct tty_struct
* tty
)
379 struct async_struct
*info
= (struct async_struct
*)tty
->driver_data
;
385 rs_send_xchar(tty
, START_CHAR(tty
));
387 printk(KERN_INFO
"simrs_unthrottle called\n");
391 static int rs_ioctl(struct tty_struct
*tty
, unsigned int cmd
, unsigned long arg
)
393 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
394 (cmd
!= TIOCSERCONFIG
) && (cmd
!= TIOCSERGSTRUCT
) &&
395 (cmd
!= TIOCMIWAIT
)) {
396 if (tty
->flags
& (1 << TTY_IO_ERROR
))
402 printk(KERN_INFO
"simrs_ioctl TIOCGSERIAL called\n");
405 printk(KERN_INFO
"simrs_ioctl TIOCSSERIAL called\n");
408 printk(KERN_INFO
"rs_ioctl: TIOCSERCONFIG called\n");
411 case TIOCSERGETLSR
: /* Get line status register */
412 printk(KERN_INFO
"rs_ioctl: TIOCSERGETLSR called\n");
416 printk(KERN_INFO
"rs_ioctl: TIOCSERGSTRUCT called\n");
418 if (copy_to_user((struct async_struct
*) arg
,
419 info
, sizeof(struct async_struct
)))
425 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
426 * - mask passed in arg for lines of interest
427 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
428 * Caller should use TIOCGICOUNT to see which one it was
431 printk(KERN_INFO
"rs_ioctl: TIOCMIWAIT: called\n");
435 /* "setserial -W" is called in Debian boot */
436 printk (KERN_INFO
"TIOCSER?WILD ioctl obsolete, ignored.\n");
445 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
447 static void rs_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
449 /* Handle turning off CRTSCTS */
450 if ((old_termios
->c_cflag
& CRTSCTS
) &&
451 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
457 * This routine will shutdown a serial port; interrupts are disabled, and
458 * DTR is dropped if the hangup on close termio flag is on.
460 static void shutdown(struct async_struct
* info
)
463 struct serial_state
*state
;
466 if (!(info
->flags
& ASYNC_INITIALIZED
)) return;
470 #ifdef SIMSERIAL_DEBUG
471 printk("Shutting down serial port %d (irq %d)....", info
->line
,
475 local_irq_save(flags
);
478 * First unlink the serial port from the IRQ chain...
481 info
->next_port
->prev_port
= info
->prev_port
;
483 info
->prev_port
->next_port
= info
->next_port
;
485 IRQ_ports
[state
->irq
] = info
->next_port
;
488 * Free the IRQ, if necessary
490 if (state
->irq
&& (!IRQ_ports
[state
->irq
] ||
491 !IRQ_ports
[state
->irq
]->next_port
)) {
492 if (IRQ_ports
[state
->irq
]) {
493 free_irq(state
->irq
, NULL
);
494 retval
= request_irq(state
->irq
, rs_interrupt_single
,
495 IRQ_T(info
), "serial", NULL
);
498 printk(KERN_ERR
"serial shutdown: request_irq: error %d"
499 " Couldn't reacquire IRQ.\n", retval
);
501 free_irq(state
->irq
, NULL
);
504 if (info
->xmit
.buf
) {
505 free_page((unsigned long) info
->xmit
.buf
);
506 info
->xmit
.buf
= NULL
;
509 if (info
->tty
) set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
511 info
->flags
&= ~ASYNC_INITIALIZED
;
513 local_irq_restore(flags
);
517 * ------------------------------------------------------------
520 * This routine is called when the serial port gets closed. First, we
521 * wait for the last remaining data to be sent. Then, we unlink its
522 * async structure from the interrupt chain if necessary, and we free
523 * that IRQ if nothing is left in the chain.
524 * ------------------------------------------------------------
526 static void rs_close(struct tty_struct
*tty
, struct file
* filp
)
528 struct async_struct
* info
= (struct async_struct
*)tty
->driver_data
;
529 struct serial_state
*state
;
536 local_irq_save(flags
);
537 if (tty_hung_up_p(filp
)) {
538 #ifdef SIMSERIAL_DEBUG
539 printk("rs_close: hung_up\n");
541 local_irq_restore(flags
);
544 #ifdef SIMSERIAL_DEBUG
545 printk("rs_close ttys%d, count = %d\n", info
->line
, state
->count
);
547 if ((tty
->count
== 1) && (state
->count
!= 1)) {
549 * Uh, oh. tty->count is 1, which means that the tty
550 * structure will be freed. state->count should always
551 * be one in these conditions. If it's greater than
552 * one, we've got real problems, since it means the
553 * serial port won't be shutdown.
555 printk(KERN_ERR
"rs_close: bad serial port count; tty->count is 1, "
556 "state->count is %d\n", state
->count
);
559 if (--state
->count
< 0) {
560 printk(KERN_ERR
"rs_close: bad serial port count for ttys%d: %d\n",
561 info
->line
, state
->count
);
565 local_irq_restore(flags
);
568 info
->flags
|= ASYNC_CLOSING
;
569 local_irq_restore(flags
);
572 * Now we wait for the transmit buffer to clear; and we notify
573 * the line discipline to only process XON/XOFF characters.
576 rs_flush_buffer(tty
);
577 tty_ldisc_flush(tty
);
580 if (info
->blocked_open
) {
581 if (info
->close_delay
)
582 schedule_timeout_interruptible(info
->close_delay
);
583 wake_up_interruptible(&info
->open_wait
);
585 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
586 wake_up_interruptible(&info
->close_wait
);
590 * rs_wait_until_sent() --- wait until the transmitter is empty
592 static void rs_wait_until_sent(struct tty_struct
*tty
, int timeout
)
598 * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
600 static void rs_hangup(struct tty_struct
*tty
)
602 struct async_struct
* info
= (struct async_struct
*)tty
->driver_data
;
603 struct serial_state
*state
= info
->state
;
605 #ifdef SIMSERIAL_DEBUG
606 printk("rs_hangup: called\n");
611 rs_flush_buffer(tty
);
612 if (info
->flags
& ASYNC_CLOSING
)
618 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
620 wake_up_interruptible(&info
->open_wait
);
624 static int get_async_struct(int line
, struct async_struct
**ret_info
)
626 struct async_struct
*info
;
627 struct serial_state
*sstate
;
629 sstate
= rs_table
+ line
;
632 *ret_info
= sstate
->info
;
635 info
= kzalloc(sizeof(struct async_struct
), GFP_KERNEL
);
640 init_waitqueue_head(&info
->open_wait
);
641 init_waitqueue_head(&info
->close_wait
);
642 init_waitqueue_head(&info
->delta_msr_wait
);
643 info
->magic
= SERIAL_MAGIC
;
644 info
->port
= sstate
->port
;
645 info
->flags
= sstate
->flags
;
646 info
->xmit_fifo_size
= sstate
->xmit_fifo_size
;
648 INIT_WORK(&info
->work
, do_softint
);
649 info
->state
= sstate
;
652 *ret_info
= sstate
->info
;
655 *ret_info
= sstate
->info
= info
;
660 startup(struct async_struct
*info
)
664 irq_handler_t handler
;
665 struct serial_state
*state
= info
->state
;
668 page
= get_zeroed_page(GFP_KERNEL
);
672 local_irq_save(flags
);
674 if (info
->flags
& ASYNC_INITIALIZED
) {
679 if (!state
->port
|| !state
->type
) {
680 if (info
->tty
) set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
687 info
->xmit
.buf
= (unsigned char *) page
;
689 #ifdef SIMSERIAL_DEBUG
690 printk("startup: ttys%d (irq %d)...", info
->line
, state
->irq
);
694 * Allocate the IRQ if necessary
696 if (state
->irq
&& (!IRQ_ports
[state
->irq
] ||
697 !IRQ_ports
[state
->irq
]->next_port
)) {
698 if (IRQ_ports
[state
->irq
]) {
702 handler
= rs_interrupt_single
;
704 retval
= request_irq(state
->irq
, handler
, IRQ_T(info
), "simserial", NULL
);
706 if (capable(CAP_SYS_ADMIN
)) {
708 set_bit(TTY_IO_ERROR
,
717 * Insert serial port into IRQ chain.
719 info
->prev_port
= NULL
;
720 info
->next_port
= IRQ_ports
[state
->irq
];
722 info
->next_port
->prev_port
= info
;
723 IRQ_ports
[state
->irq
] = info
;
725 if (info
->tty
) clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
727 info
->xmit
.head
= info
->xmit
.tail
= 0;
731 * Set up serial timers...
733 timer_table
[RS_TIMER
].expires
= jiffies
+ 2*HZ
/100;
734 timer_active
|= 1 << RS_TIMER
;
738 * Set up the tty->alt_speed kludge
741 if ((info
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_HI
)
742 info
->tty
->alt_speed
= 57600;
743 if ((info
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_VHI
)
744 info
->tty
->alt_speed
= 115200;
745 if ((info
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_SHI
)
746 info
->tty
->alt_speed
= 230400;
747 if ((info
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_WARP
)
748 info
->tty
->alt_speed
= 460800;
751 info
->flags
|= ASYNC_INITIALIZED
;
752 local_irq_restore(flags
);
756 local_irq_restore(flags
);
762 * This routine is called whenever a serial port is opened. It
763 * enables interrupts for a serial port, linking in its async structure into
764 * the IRQ chain. It also performs the serial-specific
765 * initialization for the tty structure.
767 static int rs_open(struct tty_struct
*tty
, struct file
* filp
)
769 struct async_struct
*info
;
774 if ((line
< 0) || (line
>= NR_PORTS
))
776 retval
= get_async_struct(line
, &info
);
779 tty
->driver_data
= info
;
782 #ifdef SIMSERIAL_DEBUG
783 printk("rs_open %s, count = %d\n", tty
->name
, info
->state
->count
);
785 info
->tty
->low_latency
= (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
788 page
= get_zeroed_page(GFP_KERNEL
);
794 tmp_buf
= (unsigned char *) page
;
798 * If the port is the middle of closing, bail out now
800 if (tty_hung_up_p(filp
) ||
801 (info
->flags
& ASYNC_CLOSING
)) {
802 if (info
->flags
& ASYNC_CLOSING
)
803 interruptible_sleep_on(&info
->close_wait
);
804 #ifdef SERIAL_DO_RESTART
805 return ((info
->flags
& ASYNC_HUP_NOTIFY
) ?
806 -EAGAIN
: -ERESTARTSYS
);
813 * Start up serial port
815 retval
= startup(info
);
821 * figure out which console to use (should be one already)
823 console
= console_drivers
;
825 if ((console
->flags
& CON_ENABLED
) && console
->write
) break;
826 console
= console
->next
;
829 #ifdef SIMSERIAL_DEBUG
830 printk("rs_open ttys%d successful\n", info
->line
);
836 * /proc fs routines....
839 static inline void line_info(struct seq_file
*m
, struct serial_state
*state
)
841 seq_printf(m
, "%d: uart:%s port:%lX irq:%d\n",
842 state
->line
, uart_config
[state
->type
].name
,
843 state
->port
, state
->irq
);
846 static int rs_proc_show(struct seq_file
*m
, void *v
)
850 seq_printf(m
, "simserinfo:1.0 driver:%s\n", serial_version
);
851 for (i
= 0; i
< NR_PORTS
; i
++)
852 line_info(m
, &rs_table
[i
]);
856 static int rs_proc_open(struct inode
*inode
, struct file
*file
)
858 return single_open(file
, rs_proc_show
, NULL
);
861 static const struct file_operations rs_proc_fops
= {
862 .owner
= THIS_MODULE
,
863 .open
= rs_proc_open
,
866 .release
= single_release
,
870 * ---------------------------------------------------------------------
871 * rs_init() and friends
873 * rs_init() is called at boot-time to initialize the serial driver.
874 * ---------------------------------------------------------------------
878 * This routine prints out the appropriate serial driver version
879 * number, and identifies which options were configured into this
882 static inline void show_serial_version(void)
884 printk(KERN_INFO
"%s version %s with", serial_name
, serial_version
);
885 printk(KERN_INFO
" no serial options enabled\n");
888 static const struct tty_operations hp_ops
= {
892 .put_char
= rs_put_char
,
893 .flush_chars
= rs_flush_chars
,
894 .write_room
= rs_write_room
,
895 .chars_in_buffer
= rs_chars_in_buffer
,
896 .flush_buffer
= rs_flush_buffer
,
898 .throttle
= rs_throttle
,
899 .unthrottle
= rs_unthrottle
,
900 .send_xchar
= rs_send_xchar
,
901 .set_termios
= rs_set_termios
,
905 .wait_until_sent
= rs_wait_until_sent
,
906 .proc_fops
= &rs_proc_fops
,
910 * The serial driver boot-time initialization code!
916 struct serial_state
*state
;
918 if (!ia64_platform_is("hpsim"))
921 hp_simserial_driver
= alloc_tty_driver(1);
922 if (!hp_simserial_driver
)
925 show_serial_version();
927 /* Initialize the tty_driver structure */
929 hp_simserial_driver
->owner
= THIS_MODULE
;
930 hp_simserial_driver
->driver_name
= "simserial";
931 hp_simserial_driver
->name
= "ttyS";
932 hp_simserial_driver
->major
= TTY_MAJOR
;
933 hp_simserial_driver
->minor_start
= 64;
934 hp_simserial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
935 hp_simserial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
936 hp_simserial_driver
->init_termios
= tty_std_termios
;
937 hp_simserial_driver
->init_termios
.c_cflag
=
938 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
939 hp_simserial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
940 tty_set_operations(hp_simserial_driver
, &hp_ops
);
943 * Let's have a little bit of fun !
945 for (i
= 0, state
= rs_table
; i
< NR_PORTS
; i
++,state
++) {
947 if (state
->type
== PORT_UNKNOWN
) continue;
950 if ((rc
= assign_irq_vector(AUTO_ASSIGN
)) < 0)
951 panic("%s: out of interrupt vectors!\n",
954 ia64_ssc_connect_irq(KEYBOARD_INTR
, state
->irq
);
957 printk(KERN_INFO
"ttyS%d at 0x%04lx (irq = %d) is a %s\n",
959 state
->port
, state
->irq
,
960 uart_config
[state
->type
].name
);
963 if (tty_register_driver(hp_simserial_driver
))
964 panic("Couldn't register simserial driver\n");
970 __initcall(simrs_init
);