Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Simulated Serial Driver (fake serial) | |
3 | * | |
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 | |
adb636fe | 7 | * case means sys_sim.c console (goes via the simulator). |
1da177e4 LT |
8 | * |
9 | * Copyright (C) 1999-2000, 2002-2003 Hewlett-Packard Co | |
10 | * Stephane Eranian <eranian@hpl.hp.com> | |
11 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
1da177e4 LT |
12 | */ |
13 | ||
1da177e4 LT |
14 | #include <linux/init.h> |
15 | #include <linux/errno.h> | |
16 | #include <linux/sched.h> | |
17 | #include <linux/tty.h> | |
18 | #include <linux/tty_flip.h> | |
19 | #include <linux/major.h> | |
20 | #include <linux/fcntl.h> | |
21 | #include <linux/mm.h> | |
bf54215e | 22 | #include <linux/seq_file.h> |
1da177e4 | 23 | #include <linux/slab.h> |
a9415644 | 24 | #include <linux/capability.h> |
3c4782dc | 25 | #include <linux/circ_buf.h> |
1da177e4 | 26 | #include <linux/console.h> |
8b916330 | 27 | #include <linux/irq.h> |
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/serial.h> | |
819c67e6 | 30 | #include <linux/sysrq.h> |
8b916330 | 31 | #include <linux/uaccess.h> |
1da177e4 | 32 | |
035cfe5a | 33 | #include <asm/hpsim.h> |
1da177e4 | 34 | |
035cfe5a JS |
35 | #include "hpsim_ssc.h" |
36 | ||
1da177e4 LT |
37 | #undef SIMSERIAL_DEBUG /* define this to get some debug information */ |
38 | ||
39 | #define KEYBOARD_INTR 3 /* must match with simulator! */ | |
40 | ||
41 | #define NR_PORTS 1 /* only one port for now */ | |
1da177e4 | 42 | |
3c4782dc | 43 | struct serial_state { |
7f32f8dd | 44 | struct tty_port port; |
3c4782dc JS |
45 | struct circ_buf xmit; |
46 | int irq; | |
47 | int x_char; | |
48 | }; | |
49 | ||
fd2d7a6e | 50 | static struct serial_state rs_table[NR_PORTS]; |
1da177e4 LT |
51 | |
52 | struct tty_driver *hp_simserial_driver; | |
53 | ||
1da177e4 LT |
54 | static struct console *console; |
55 | ||
2fcd5caf | 56 | static void receive_chars(struct tty_struct *tty) |
1da177e4 LT |
57 | { |
58 | unsigned char ch; | |
59 | static unsigned char seen_esc = 0; | |
60 | ||
61 | while ( (ch = ia64_ssc(0, 0, 0, 0, SSC_GETCHAR)) ) { | |
f66279cd | 62 | if (ch == 27 && seen_esc == 0) { |
1da177e4 LT |
63 | seen_esc = 1; |
64 | continue; | |
f66279cd JS |
65 | } else if (seen_esc == 1 && ch == 'O') { |
66 | seen_esc = 2; | |
67 | continue; | |
68 | } else if (seen_esc == 2) { | |
69 | if (ch == 'P') /* F1 */ | |
70 | show_state(); | |
819c67e6 | 71 | #ifdef CONFIG_MAGIC_SYSRQ |
f66279cd JS |
72 | if (ch == 'S') { /* F4 */ |
73 | do { | |
74 | ch = ia64_ssc(0, 0, 0, 0, SSC_GETCHAR); | |
75 | } while (!ch); | |
76 | handle_sysrq(ch); | |
1da177e4 | 77 | } |
f66279cd JS |
78 | #endif |
79 | seen_esc = 0; | |
80 | continue; | |
1da177e4 LT |
81 | } |
82 | seen_esc = 0; | |
1da177e4 | 83 | |
d50f5c5c AS |
84 | if (tty_insert_flip_char(tty, ch, TTY_NORMAL) == 0) |
85 | break; | |
1da177e4 LT |
86 | } |
87 | tty_flip_buffer_push(tty); | |
88 | } | |
89 | ||
90 | /* | |
91 | * This is the serial driver's interrupt routine for a single port | |
92 | */ | |
5dcded1b | 93 | static irqreturn_t rs_interrupt_single(int irq, void *dev_id) |
1da177e4 | 94 | { |
916b7656 | 95 | struct serial_state *info = dev_id; |
3a5c2423 | 96 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
1da177e4 | 97 | |
7f32f8dd | 98 | if (!tty) { |
6e9ebcfa | 99 | printk(KERN_INFO "%s: tty=0 problem\n", __func__); |
1da177e4 LT |
100 | return IRQ_NONE; |
101 | } | |
102 | /* | |
103 | * pretty simple in our case, because we only get interrupts | |
104 | * on inbound traffic | |
105 | */ | |
7f32f8dd | 106 | receive_chars(tty); |
3a5c2423 | 107 | tty_kref_put(tty); |
1da177e4 LT |
108 | return IRQ_HANDLED; |
109 | } | |
110 | ||
111 | /* | |
112 | * ------------------------------------------------------------------- | |
113 | * Here ends the serial interrupt routines. | |
114 | * ------------------------------------------------------------------- | |
115 | */ | |
116 | ||
f34d7a5b | 117 | static int rs_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 118 | { |
916b7656 | 119 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
120 | unsigned long flags; |
121 | ||
6e9ebcfa | 122 | if (!info->xmit.buf) |
f34d7a5b | 123 | return 0; |
1da177e4 LT |
124 | |
125 | local_irq_save(flags); | |
126 | if (CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) == 0) { | |
127 | local_irq_restore(flags); | |
f34d7a5b | 128 | return 0; |
1da177e4 LT |
129 | } |
130 | info->xmit.buf[info->xmit.head] = ch; | |
131 | info->xmit.head = (info->xmit.head + 1) & (SERIAL_XMIT_SIZE-1); | |
132 | local_irq_restore(flags); | |
f34d7a5b | 133 | return 1; |
1da177e4 LT |
134 | } |
135 | ||
5e99d545 JS |
136 | static void transmit_chars(struct tty_struct *tty, struct serial_state *info, |
137 | int *intr_done) | |
1da177e4 LT |
138 | { |
139 | int count; | |
140 | unsigned long flags; | |
141 | ||
1da177e4 LT |
142 | local_irq_save(flags); |
143 | ||
144 | if (info->x_char) { | |
145 | char c = info->x_char; | |
146 | ||
147 | console->write(console, &c, 1); | |
148 | ||
1da177e4 LT |
149 | info->x_char = 0; |
150 | ||
151 | goto out; | |
152 | } | |
153 | ||
5e99d545 JS |
154 | if (info->xmit.head == info->xmit.tail || tty->stopped || |
155 | tty->hw_stopped) { | |
1da177e4 LT |
156 | #ifdef SIMSERIAL_DEBUG |
157 | printk("transmit_chars: head=%d, tail=%d, stopped=%d\n", | |
5e99d545 | 158 | info->xmit.head, info->xmit.tail, tty->stopped); |
1da177e4 LT |
159 | #endif |
160 | goto out; | |
161 | } | |
162 | /* | |
163 | * We removed the loop and try to do it in to chunks. We need | |
164 | * 2 operations maximum because it's a ring buffer. | |
165 | * | |
166 | * First from current to tail if possible. | |
167 | * Then from the beginning of the buffer until necessary | |
168 | */ | |
169 | ||
170 | count = min(CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE), | |
171 | SERIAL_XMIT_SIZE - info->xmit.tail); | |
172 | console->write(console, info->xmit.buf+info->xmit.tail, count); | |
173 | ||
174 | info->xmit.tail = (info->xmit.tail+count) & (SERIAL_XMIT_SIZE-1); | |
175 | ||
176 | /* | |
177 | * We have more at the beginning of the buffer | |
178 | */ | |
179 | count = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
180 | if (count) { | |
181 | console->write(console, info->xmit.buf, count); | |
182 | info->xmit.tail += count; | |
183 | } | |
184 | out: | |
185 | local_irq_restore(flags); | |
186 | } | |
187 | ||
188 | static void rs_flush_chars(struct tty_struct *tty) | |
189 | { | |
916b7656 | 190 | struct serial_state *info = tty->driver_data; |
1da177e4 | 191 | |
f66279cd JS |
192 | if (info->xmit.head == info->xmit.tail || tty->stopped || |
193 | tty->hw_stopped || !info->xmit.buf) | |
1da177e4 LT |
194 | return; |
195 | ||
5e99d545 | 196 | transmit_chars(tty, info, NULL); |
1da177e4 LT |
197 | } |
198 | ||
1da177e4 LT |
199 | static int rs_write(struct tty_struct * tty, |
200 | const unsigned char *buf, int count) | |
201 | { | |
916b7656 | 202 | struct serial_state *info = tty->driver_data; |
1da177e4 | 203 | int c, ret = 0; |
1da177e4 LT |
204 | unsigned long flags; |
205 | ||
6e9ebcfa | 206 | if (!info->xmit.buf) |
d88405d4 | 207 | return 0; |
1da177e4 LT |
208 | |
209 | local_irq_save(flags); | |
210 | while (1) { | |
211 | c = CIRC_SPACE_TO_END(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
212 | if (count < c) | |
213 | c = count; | |
214 | if (c <= 0) { | |
215 | break; | |
216 | } | |
217 | memcpy(info->xmit.buf + info->xmit.head, buf, c); | |
218 | info->xmit.head = ((info->xmit.head + c) & | |
219 | (SERIAL_XMIT_SIZE-1)); | |
220 | buf += c; | |
221 | count -= c; | |
222 | ret += c; | |
223 | } | |
224 | local_irq_restore(flags); | |
225 | /* | |
226 | * Hey, we transmit directly from here in our case | |
227 | */ | |
f66279cd JS |
228 | if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) && |
229 | !tty->stopped && !tty->hw_stopped) | |
5e99d545 | 230 | transmit_chars(tty, info, NULL); |
f66279cd | 231 | |
1da177e4 LT |
232 | return ret; |
233 | } | |
234 | ||
235 | static int rs_write_room(struct tty_struct *tty) | |
236 | { | |
916b7656 | 237 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
238 | |
239 | return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
240 | } | |
241 | ||
242 | static int rs_chars_in_buffer(struct tty_struct *tty) | |
243 | { | |
916b7656 | 244 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
245 | |
246 | return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); | |
247 | } | |
248 | ||
249 | static void rs_flush_buffer(struct tty_struct *tty) | |
250 | { | |
916b7656 | 251 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
252 | unsigned long flags; |
253 | ||
254 | local_irq_save(flags); | |
255 | info->xmit.head = info->xmit.tail = 0; | |
256 | local_irq_restore(flags); | |
257 | ||
15648f15 | 258 | tty_wakeup(tty); |
1da177e4 LT |
259 | } |
260 | ||
261 | /* | |
262 | * This function is used to send a high-priority XON/XOFF character to | |
263 | * the device | |
264 | */ | |
265 | static void rs_send_xchar(struct tty_struct *tty, char ch) | |
266 | { | |
916b7656 | 267 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
268 | |
269 | info->x_char = ch; | |
270 | if (ch) { | |
271 | /* | |
272 | * I guess we could call console->write() directly but | |
273 | * let's do that for now. | |
274 | */ | |
5e99d545 | 275 | transmit_chars(tty, info, NULL); |
1da177e4 LT |
276 | } |
277 | } | |
278 | ||
279 | /* | |
280 | * ------------------------------------------------------------ | |
281 | * rs_throttle() | |
282 | * | |
283 | * This routine is called by the upper-layer tty layer to signal that | |
284 | * incoming characters should be throttled. | |
285 | * ------------------------------------------------------------ | |
286 | */ | |
287 | static void rs_throttle(struct tty_struct * tty) | |
288 | { | |
f66279cd JS |
289 | if (I_IXOFF(tty)) |
290 | rs_send_xchar(tty, STOP_CHAR(tty)); | |
1da177e4 LT |
291 | |
292 | printk(KERN_INFO "simrs_throttle called\n"); | |
293 | } | |
294 | ||
295 | static void rs_unthrottle(struct tty_struct * tty) | |
296 | { | |
916b7656 | 297 | struct serial_state *info = tty->driver_data; |
1da177e4 LT |
298 | |
299 | if (I_IXOFF(tty)) { | |
300 | if (info->x_char) | |
301 | info->x_char = 0; | |
302 | else | |
303 | rs_send_xchar(tty, START_CHAR(tty)); | |
304 | } | |
305 | printk(KERN_INFO "simrs_unthrottle called\n"); | |
306 | } | |
307 | ||
10e82f6c | 308 | static int rs_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
309 | { |
310 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
311 | (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) && | |
0587102c | 312 | (cmd != TIOCMIWAIT)) { |
1da177e4 LT |
313 | if (tty->flags & (1 << TTY_IO_ERROR)) |
314 | return -EIO; | |
315 | } | |
316 | ||
317 | switch (cmd) { | |
f66279cd JS |
318 | case TIOCGSERIAL: |
319 | case TIOCSSERIAL: | |
320 | case TIOCSERGSTRUCT: | |
321 | case TIOCMIWAIT: | |
322 | return 0; | |
323 | case TIOCSERCONFIG: | |
324 | case TIOCSERGETLSR: /* Get line status register */ | |
325 | return -EINVAL; | |
326 | case TIOCSERGWILD: | |
327 | case TIOCSERSWILD: | |
328 | /* "setserial -W" is called in Debian boot */ | |
329 | printk (KERN_INFO "TIOCSER?WILD ioctl obsolete, ignored.\n"); | |
330 | return 0; | |
331 | } | |
332 | return -ENOIOCTLCMD; | |
1da177e4 LT |
333 | } |
334 | ||
335 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) | |
336 | ||
f889a26a | 337 | static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 | 338 | { |
1da177e4 LT |
339 | /* Handle turning off CRTSCTS */ |
340 | if ((old_termios->c_cflag & CRTSCTS) && | |
adc8d746 | 341 | !(tty->termios.c_cflag & CRTSCTS)) { |
1da177e4 | 342 | tty->hw_stopped = 0; |
1da177e4 LT |
343 | } |
344 | } | |
345 | /* | |
346 | * This routine will shutdown a serial port; interrupts are disabled, and | |
347 | * DTR is dropped if the hangup on close termio flag is on. | |
348 | */ | |
458cd31a | 349 | static void shutdown(struct tty_port *port) |
1da177e4 | 350 | { |
458cd31a JS |
351 | struct serial_state *info = container_of(port, struct serial_state, |
352 | port); | |
353 | unsigned long flags; | |
1da177e4 LT |
354 | |
355 | local_irq_save(flags); | |
f66279cd JS |
356 | if (info->irq) |
357 | free_irq(info->irq, info); | |
1da177e4 | 358 | |
f66279cd JS |
359 | if (info->xmit.buf) { |
360 | free_page((unsigned long) info->xmit.buf); | |
361 | info->xmit.buf = NULL; | |
1da177e4 LT |
362 | } |
363 | local_irq_restore(flags); | |
364 | } | |
365 | ||
1da177e4 LT |
366 | static void rs_close(struct tty_struct *tty, struct file * filp) |
367 | { | |
916b7656 | 368 | struct serial_state *info = tty->driver_data; |
37343030 | 369 | |
458cd31a | 370 | tty_port_close(&info->port, tty, filp); |
1da177e4 LT |
371 | } |
372 | ||
1da177e4 LT |
373 | static void rs_hangup(struct tty_struct *tty) |
374 | { | |
916b7656 | 375 | struct serial_state *info = tty->driver_data; |
1da177e4 | 376 | |
1da177e4 | 377 | rs_flush_buffer(tty); |
458cd31a | 378 | tty_port_hangup(&info->port); |
1da177e4 LT |
379 | } |
380 | ||
9aead90a | 381 | static int activate(struct tty_port *port, struct tty_struct *tty) |
1da177e4 | 382 | { |
9aead90a JS |
383 | struct serial_state *state = container_of(port, struct serial_state, |
384 | port); | |
f66279cd JS |
385 | unsigned long flags, page; |
386 | int retval = 0; | |
1da177e4 LT |
387 | |
388 | page = get_zeroed_page(GFP_KERNEL); | |
389 | if (!page) | |
390 | return -ENOMEM; | |
391 | ||
392 | local_irq_save(flags); | |
393 | ||
916b7656 | 394 | if (state->xmit.buf) |
1da177e4 LT |
395 | free_page(page); |
396 | else | |
916b7656 | 397 | state->xmit.buf = (unsigned char *) page; |
1da177e4 | 398 | |
964105b5 | 399 | if (state->irq) { |
2f8c521a | 400 | retval = request_irq(state->irq, rs_interrupt_single, 0, |
916b7656 | 401 | "simserial", state); |
9e12dd5f | 402 | if (retval) |
1da177e4 | 403 | goto errout; |
1da177e4 LT |
404 | } |
405 | ||
916b7656 | 406 | state->xmit.head = state->xmit.tail = 0; |
1da177e4 | 407 | |
1da177e4 LT |
408 | /* |
409 | * Set up the tty->alt_speed kludge | |
410 | */ | |
01bd730d | 411 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
5e99d545 | 412 | tty->alt_speed = 57600; |
01bd730d | 413 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
5e99d545 | 414 | tty->alt_speed = 115200; |
01bd730d | 415 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
5e99d545 | 416 | tty->alt_speed = 230400; |
01bd730d | 417 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
5e99d545 | 418 | tty->alt_speed = 460800; |
1da177e4 | 419 | |
1da177e4 LT |
420 | errout: |
421 | local_irq_restore(flags); | |
422 | return retval; | |
423 | } | |
424 | ||
425 | ||
426 | /* | |
427 | * This routine is called whenever a serial port is opened. It | |
428 | * enables interrupts for a serial port, linking in its async structure into | |
429 | * the IRQ chain. It also performs the serial-specific | |
430 | * initialization for the tty structure. | |
431 | */ | |
432 | static int rs_open(struct tty_struct *tty, struct file * filp) | |
433 | { | |
916b7656 | 434 | struct serial_state *info = rs_table + tty->index; |
7f32f8dd | 435 | struct tty_port *port = &info->port; |
1da177e4 | 436 | |
916b7656 | 437 | tty->driver_data = info; |
7f32f8dd | 438 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
1da177e4 | 439 | |
1da177e4 LT |
440 | /* |
441 | * figure out which console to use (should be one already) | |
442 | */ | |
443 | console = console_drivers; | |
444 | while (console) { | |
445 | if ((console->flags & CON_ENABLED) && console->write) break; | |
446 | console = console->next; | |
447 | } | |
448 | ||
9aead90a | 449 | return tty_port_open(port, tty, filp); |
1da177e4 LT |
450 | } |
451 | ||
452 | /* | |
453 | * /proc fs routines.... | |
454 | */ | |
455 | ||
bf54215e | 456 | static int rs_proc_show(struct seq_file *m, void *v) |
1da177e4 | 457 | { |
bf54215e AD |
458 | int i; |
459 | ||
6e9ebcfa | 460 | seq_printf(m, "simserinfo:1.0\n"); |
bf54215e | 461 | for (i = 0; i < NR_PORTS; i++) |
98e3a9e6 JS |
462 | seq_printf(m, "%d: uart:16550 port:3F8 irq:%d\n", |
463 | i, rs_table[i].irq); | |
bf54215e | 464 | return 0; |
1da177e4 LT |
465 | } |
466 | ||
bf54215e AD |
467 | static int rs_proc_open(struct inode *inode, struct file *file) |
468 | { | |
469 | return single_open(file, rs_proc_show, NULL); | |
470 | } | |
471 | ||
472 | static const struct file_operations rs_proc_fops = { | |
473 | .owner = THIS_MODULE, | |
474 | .open = rs_proc_open, | |
475 | .read = seq_read, | |
476 | .llseek = seq_lseek, | |
477 | .release = single_release, | |
478 | }; | |
479 | ||
b68e31d0 | 480 | static const struct tty_operations hp_ops = { |
1da177e4 LT |
481 | .open = rs_open, |
482 | .close = rs_close, | |
483 | .write = rs_write, | |
484 | .put_char = rs_put_char, | |
485 | .flush_chars = rs_flush_chars, | |
486 | .write_room = rs_write_room, | |
487 | .chars_in_buffer = rs_chars_in_buffer, | |
488 | .flush_buffer = rs_flush_buffer, | |
489 | .ioctl = rs_ioctl, | |
490 | .throttle = rs_throttle, | |
491 | .unthrottle = rs_unthrottle, | |
492 | .send_xchar = rs_send_xchar, | |
493 | .set_termios = rs_set_termios, | |
1da177e4 | 494 | .hangup = rs_hangup, |
bf54215e | 495 | .proc_fops = &rs_proc_fops, |
1da177e4 LT |
496 | }; |
497 | ||
37343030 | 498 | static const struct tty_port_operations hp_port_ops = { |
9aead90a | 499 | .activate = activate, |
458cd31a | 500 | .shutdown = shutdown, |
37343030 JS |
501 | }; |
502 | ||
fd2d7a6e | 503 | static int __init simrs_init(void) |
1da177e4 | 504 | { |
fd2d7a6e JS |
505 | struct serial_state *state; |
506 | int retval; | |
1da177e4 LT |
507 | |
508 | if (!ia64_platform_is("hpsim")) | |
509 | return -ENODEV; | |
510 | ||
410235fd | 511 | hp_simserial_driver = alloc_tty_driver(NR_PORTS); |
1da177e4 LT |
512 | if (!hp_simserial_driver) |
513 | return -ENOMEM; | |
514 | ||
6e9ebcfa | 515 | printk(KERN_INFO "SimSerial driver with no serial options enabled\n"); |
1da177e4 LT |
516 | |
517 | /* Initialize the tty_driver structure */ | |
518 | ||
1da177e4 LT |
519 | hp_simserial_driver->driver_name = "simserial"; |
520 | hp_simserial_driver->name = "ttyS"; | |
521 | hp_simserial_driver->major = TTY_MAJOR; | |
522 | hp_simserial_driver->minor_start = 64; | |
523 | hp_simserial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
524 | hp_simserial_driver->subtype = SERIAL_TYPE_NORMAL; | |
525 | hp_simserial_driver->init_termios = tty_std_termios; | |
526 | hp_simserial_driver->init_termios.c_cflag = | |
527 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
528 | hp_simserial_driver->flags = TTY_DRIVER_REAL_RAW; | |
529 | tty_set_operations(hp_simserial_driver, &hp_ops); | |
530 | ||
fd2d7a6e | 531 | state = rs_table; |
7f32f8dd | 532 | tty_port_init(&state->port); |
37343030 | 533 | state->port.ops = &hp_port_ops; |
7f32f8dd | 534 | state->port.close_delay = 0; /* XXX really 0? */ |
fd2d7a6e JS |
535 | |
536 | retval = hpsim_get_irq(KEYBOARD_INTR); | |
537 | if (retval < 0) { | |
538 | printk(KERN_ERR "%s: out of interrupt vectors!\n", | |
539 | __func__); | |
540 | goto err_free_tty; | |
541 | } | |
1da177e4 | 542 | |
fd2d7a6e | 543 | state->irq = retval; |
1da177e4 | 544 | |
fd2d7a6e | 545 | /* the port is imaginary */ |
98e3a9e6 | 546 | printk(KERN_INFO "ttyS0 at 0x03f8 (irq = %d) is a 16550\n", state->irq); |
1da177e4 | 547 | |
b19e2ca7 | 548 | tty_port_link_device(&state->port, hp_simserial_driver, 0); |
fd2d7a6e JS |
549 | retval = tty_register_driver(hp_simserial_driver); |
550 | if (retval) { | |
551 | printk(KERN_ERR "Couldn't register simserial driver\n"); | |
552 | goto err_free_tty; | |
1da177e4 LT |
553 | } |
554 | ||
1da177e4 | 555 | return 0; |
fd2d7a6e JS |
556 | err_free_tty: |
557 | put_tty_driver(hp_simserial_driver); | |
558 | return retval; | |
1da177e4 LT |
559 | } |
560 | ||
561 | #ifndef MODULE | |
562 | __initcall(simrs_init); | |
563 | #endif |