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Commit | Line | Data |
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02fd473b DM |
1 | /* sunhv.c: Serial driver for SUN4V hypervisor console. |
2 | * | |
c7754d46 | 3 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
02fd473b DM |
4 | */ |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/errno.h> | |
9 | #include <linux/tty.h> | |
10 | #include <linux/tty_flip.h> | |
11 | #include <linux/major.h> | |
12 | #include <linux/circ_buf.h> | |
13 | #include <linux/serial.h> | |
14 | #include <linux/sysrq.h> | |
15 | #include <linux/console.h> | |
16 | #include <linux/spinlock.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/init.h> | |
20 | ||
21 | #include <asm/hypervisor.h> | |
22 | #include <asm/spitfire.h> | |
93872ba2 DM |
23 | #include <asm/prom.h> |
24 | #include <asm/of_device.h> | |
f4266ab4 | 25 | #include <asm/irq.h> |
02fd473b DM |
26 | |
27 | #if defined(CONFIG_MAGIC_SYSRQ) | |
28 | #define SUPPORT_SYSRQ | |
29 | #endif | |
30 | ||
31 | #include <linux/serial_core.h> | |
32 | ||
33 | #include "suncore.h" | |
34 | ||
35 | #define CON_BREAK ((long)-1) | |
36 | #define CON_HUP ((long)-2) | |
37 | ||
c7754d46 DM |
38 | #define IGNORE_BREAK 0x1 |
39 | #define IGNORE_ALL 0x2 | |
02fd473b | 40 | |
c7754d46 DM |
41 | static char *con_write_page; |
42 | static char *con_read_page; | |
02fd473b | 43 | |
c7754d46 | 44 | static int hung_up = 0; |
02fd473b | 45 | |
c7754d46 | 46 | static void transmit_chars_putchar(struct uart_port *port, struct circ_buf *xmit) |
02fd473b | 47 | { |
c7754d46 DM |
48 | while (!uart_circ_empty(xmit)) { |
49 | long status = sun4v_con_putchar(xmit->buf[xmit->tail]); | |
02fd473b | 50 | |
c7754d46 DM |
51 | if (status != HV_EOK) |
52 | break; | |
02fd473b | 53 | |
c7754d46 DM |
54 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
55 | port->icount.tx++; | |
56 | } | |
02fd473b DM |
57 | } |
58 | ||
c7754d46 DM |
59 | static void transmit_chars_write(struct uart_port *port, struct circ_buf *xmit) |
60 | { | |
61 | while (!uart_circ_empty(xmit)) { | |
62 | unsigned long ra = __pa(xmit->buf + xmit->tail); | |
63 | unsigned long len, status, sent; | |
02fd473b | 64 | |
c7754d46 DM |
65 | len = CIRC_CNT_TO_END(xmit->head, xmit->tail, |
66 | UART_XMIT_SIZE); | |
67 | status = sun4v_con_write(ra, len, &sent); | |
68 | if (status != HV_EOK) | |
69 | break; | |
70 | xmit->tail = (xmit->tail + sent) & (UART_XMIT_SIZE - 1); | |
71 | port->icount.tx += sent; | |
72 | } | |
73 | } | |
02fd473b | 74 | |
c7754d46 | 75 | static int receive_chars_getchar(struct uart_port *port, struct tty_struct *tty) |
02fd473b | 76 | { |
02fd473b DM |
77 | int saw_console_brk = 0; |
78 | int limit = 10000; | |
79 | ||
02fd473b DM |
80 | while (limit-- > 0) { |
81 | long status; | |
c7754d46 | 82 | long c = sun4v_con_getchar(&status); |
02fd473b DM |
83 | |
84 | if (status == HV_EWOULDBLOCK) | |
85 | break; | |
86 | ||
87 | if (c == CON_BREAK) { | |
135066a2 DM |
88 | if (uart_handle_break(port)) |
89 | continue; | |
02fd473b DM |
90 | saw_console_brk = 1; |
91 | c = 0; | |
92 | } | |
93 | ||
94 | if (c == CON_HUP) { | |
95 | hung_up = 1; | |
96 | uart_handle_dcd_change(port, 0); | |
97 | } else if (hung_up) { | |
98 | hung_up = 0; | |
99 | uart_handle_dcd_change(port, 1); | |
100 | } | |
101 | ||
102 | if (tty == NULL) { | |
7d12e780 | 103 | uart_handle_sysrq_char(port, c); |
02fd473b DM |
104 | continue; |
105 | } | |
106 | ||
02fd473b | 107 | port->icount.rx++; |
02fd473b | 108 | |
7d12e780 | 109 | if (uart_handle_sysrq_char(port, c)) |
02fd473b DM |
110 | continue; |
111 | ||
c7754d46 DM |
112 | tty_insert_flip_char(tty, c, TTY_NORMAL); |
113 | } | |
114 | ||
115 | return saw_console_brk; | |
116 | } | |
117 | ||
118 | static int receive_chars_read(struct uart_port *port, struct tty_struct *tty) | |
119 | { | |
120 | int saw_console_brk = 0; | |
121 | int limit = 10000; | |
122 | ||
123 | while (limit-- > 0) { | |
124 | unsigned long ra = __pa(con_read_page); | |
125 | unsigned long bytes_read, i; | |
126 | long stat = sun4v_con_read(ra, PAGE_SIZE, &bytes_read); | |
127 | ||
128 | if (stat != HV_EOK) { | |
129 | bytes_read = 0; | |
130 | ||
131 | if (stat == CON_BREAK) { | |
132 | if (uart_handle_break(port)) | |
133 | continue; | |
134 | saw_console_brk = 1; | |
135 | *con_read_page = 0; | |
136 | bytes_read = 1; | |
137 | } else if (stat == CON_HUP) { | |
138 | hung_up = 1; | |
139 | uart_handle_dcd_change(port, 0); | |
140 | continue; | |
141 | } else { | |
142 | /* HV_EWOULDBLOCK, etc. */ | |
143 | break; | |
144 | } | |
145 | } | |
146 | ||
147 | if (hung_up) { | |
148 | hung_up = 0; | |
149 | uart_handle_dcd_change(port, 1); | |
150 | } | |
151 | ||
152 | for (i = 0; i < bytes_read; i++) | |
153 | uart_handle_sysrq_char(port, con_read_page[i]); | |
154 | ||
155 | if (tty == NULL) | |
02fd473b DM |
156 | continue; |
157 | ||
c7754d46 DM |
158 | port->icount.rx += bytes_read; |
159 | ||
160 | tty_insert_flip_string(tty, con_read_page, bytes_read); | |
02fd473b DM |
161 | } |
162 | ||
c7754d46 DM |
163 | return saw_console_brk; |
164 | } | |
165 | ||
166 | struct sunhv_ops { | |
167 | void (*transmit_chars)(struct uart_port *port, struct circ_buf *xmit); | |
168 | int (*receive_chars)(struct uart_port *port, struct tty_struct *tty); | |
169 | }; | |
170 | ||
171 | static struct sunhv_ops bychar_ops = { | |
172 | .transmit_chars = transmit_chars_putchar, | |
173 | .receive_chars = receive_chars_getchar, | |
174 | }; | |
175 | ||
176 | static struct sunhv_ops bywrite_ops = { | |
177 | .transmit_chars = transmit_chars_write, | |
178 | .receive_chars = receive_chars_read, | |
179 | }; | |
180 | ||
181 | static struct sunhv_ops *sunhv_ops = &bychar_ops; | |
182 | ||
183 | static struct tty_struct *receive_chars(struct uart_port *port) | |
184 | { | |
185 | struct tty_struct *tty = NULL; | |
186 | ||
187 | if (port->info != NULL) /* Unopened serial console */ | |
188 | tty = port->info->tty; | |
189 | ||
190 | if (sunhv_ops->receive_chars(port, tty)) | |
02fd473b DM |
191 | sun_do_break(); |
192 | ||
193 | return tty; | |
194 | } | |
195 | ||
196 | static void transmit_chars(struct uart_port *port) | |
197 | { | |
db33f9bc DM |
198 | struct circ_buf *xmit; |
199 | ||
200 | if (!port->info) | |
201 | return; | |
02fd473b | 202 | |
db33f9bc | 203 | xmit = &port->info->xmit; |
02fd473b DM |
204 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) |
205 | return; | |
206 | ||
c7754d46 | 207 | sunhv_ops->transmit_chars(port, xmit); |
02fd473b DM |
208 | |
209 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
210 | uart_write_wakeup(port); | |
211 | } | |
212 | ||
7d12e780 | 213 | static irqreturn_t sunhv_interrupt(int irq, void *dev_id) |
02fd473b DM |
214 | { |
215 | struct uart_port *port = dev_id; | |
216 | struct tty_struct *tty; | |
217 | unsigned long flags; | |
218 | ||
219 | spin_lock_irqsave(&port->lock, flags); | |
7d12e780 | 220 | tty = receive_chars(port); |
02fd473b DM |
221 | transmit_chars(port); |
222 | spin_unlock_irqrestore(&port->lock, flags); | |
223 | ||
224 | if (tty) | |
225 | tty_flip_buffer_push(tty); | |
226 | ||
227 | return IRQ_HANDLED; | |
228 | } | |
229 | ||
230 | /* port->lock is not held. */ | |
231 | static unsigned int sunhv_tx_empty(struct uart_port *port) | |
232 | { | |
233 | /* Transmitter is always empty for us. If the circ buffer | |
234 | * is non-empty or there is an x_char pending, our caller | |
235 | * will do the right thing and ignore what we return here. | |
236 | */ | |
237 | return TIOCSER_TEMT; | |
238 | } | |
239 | ||
240 | /* port->lock held by caller. */ | |
241 | static void sunhv_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
242 | { | |
243 | return; | |
244 | } | |
245 | ||
246 | /* port->lock is held by caller and interrupts are disabled. */ | |
247 | static unsigned int sunhv_get_mctrl(struct uart_port *port) | |
248 | { | |
249 | return TIOCM_DSR | TIOCM_CAR | TIOCM_CTS; | |
250 | } | |
251 | ||
252 | /* port->lock held by caller. */ | |
253 | static void sunhv_stop_tx(struct uart_port *port) | |
254 | { | |
255 | return; | |
256 | } | |
257 | ||
258 | /* port->lock held by caller. */ | |
259 | static void sunhv_start_tx(struct uart_port *port) | |
260 | { | |
f798634d | 261 | transmit_chars(port); |
02fd473b DM |
262 | } |
263 | ||
264 | /* port->lock is not held. */ | |
265 | static void sunhv_send_xchar(struct uart_port *port, char ch) | |
266 | { | |
267 | unsigned long flags; | |
268 | int limit = 10000; | |
269 | ||
270 | spin_lock_irqsave(&port->lock, flags); | |
271 | ||
272 | while (limit-- > 0) { | |
c7754d46 | 273 | long status = sun4v_con_putchar(ch); |
02fd473b DM |
274 | if (status == HV_EOK) |
275 | break; | |
c7754d46 | 276 | udelay(1); |
02fd473b DM |
277 | } |
278 | ||
279 | spin_unlock_irqrestore(&port->lock, flags); | |
280 | } | |
281 | ||
282 | /* port->lock held by caller. */ | |
283 | static void sunhv_stop_rx(struct uart_port *port) | |
284 | { | |
285 | } | |
286 | ||
287 | /* port->lock held by caller. */ | |
288 | static void sunhv_enable_ms(struct uart_port *port) | |
289 | { | |
290 | } | |
291 | ||
292 | /* port->lock is not held. */ | |
293 | static void sunhv_break_ctl(struct uart_port *port, int break_state) | |
294 | { | |
295 | if (break_state) { | |
296 | unsigned long flags; | |
c7754d46 | 297 | int limit = 10000; |
02fd473b DM |
298 | |
299 | spin_lock_irqsave(&port->lock, flags); | |
300 | ||
301 | while (limit-- > 0) { | |
c7754d46 | 302 | long status = sun4v_con_putchar(CON_BREAK); |
02fd473b DM |
303 | if (status == HV_EOK) |
304 | break; | |
c7754d46 | 305 | udelay(1); |
02fd473b DM |
306 | } |
307 | ||
308 | spin_unlock_irqrestore(&port->lock, flags); | |
309 | } | |
310 | } | |
311 | ||
312 | /* port->lock is not held. */ | |
313 | static int sunhv_startup(struct uart_port *port) | |
314 | { | |
315 | return 0; | |
316 | } | |
317 | ||
318 | /* port->lock is not held. */ | |
319 | static void sunhv_shutdown(struct uart_port *port) | |
320 | { | |
321 | } | |
322 | ||
323 | /* port->lock is not held. */ | |
606d099c AC |
324 | static void sunhv_set_termios(struct uart_port *port, struct ktermios *termios, |
325 | struct ktermios *old) | |
02fd473b DM |
326 | { |
327 | unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); | |
328 | unsigned int quot = uart_get_divisor(port, baud); | |
329 | unsigned int iflag, cflag; | |
330 | unsigned long flags; | |
331 | ||
332 | spin_lock_irqsave(&port->lock, flags); | |
333 | ||
334 | iflag = termios->c_iflag; | |
335 | cflag = termios->c_cflag; | |
336 | ||
337 | port->ignore_status_mask = 0; | |
338 | if (iflag & IGNBRK) | |
339 | port->ignore_status_mask |= IGNORE_BREAK; | |
340 | if ((cflag & CREAD) == 0) | |
341 | port->ignore_status_mask |= IGNORE_ALL; | |
342 | ||
343 | /* XXX */ | |
344 | uart_update_timeout(port, cflag, | |
345 | (port->uartclk / (16 * quot))); | |
346 | ||
347 | spin_unlock_irqrestore(&port->lock, flags); | |
348 | } | |
349 | ||
350 | static const char *sunhv_type(struct uart_port *port) | |
351 | { | |
352 | return "SUN4V HCONS"; | |
353 | } | |
354 | ||
355 | static void sunhv_release_port(struct uart_port *port) | |
356 | { | |
357 | } | |
358 | ||
359 | static int sunhv_request_port(struct uart_port *port) | |
360 | { | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static void sunhv_config_port(struct uart_port *port, int flags) | |
365 | { | |
366 | } | |
367 | ||
368 | static int sunhv_verify_port(struct uart_port *port, struct serial_struct *ser) | |
369 | { | |
370 | return -EINVAL; | |
371 | } | |
372 | ||
373 | static struct uart_ops sunhv_pops = { | |
374 | .tx_empty = sunhv_tx_empty, | |
375 | .set_mctrl = sunhv_set_mctrl, | |
376 | .get_mctrl = sunhv_get_mctrl, | |
377 | .stop_tx = sunhv_stop_tx, | |
378 | .start_tx = sunhv_start_tx, | |
379 | .send_xchar = sunhv_send_xchar, | |
380 | .stop_rx = sunhv_stop_rx, | |
381 | .enable_ms = sunhv_enable_ms, | |
382 | .break_ctl = sunhv_break_ctl, | |
383 | .startup = sunhv_startup, | |
384 | .shutdown = sunhv_shutdown, | |
385 | .set_termios = sunhv_set_termios, | |
386 | .type = sunhv_type, | |
387 | .release_port = sunhv_release_port, | |
388 | .request_port = sunhv_request_port, | |
389 | .config_port = sunhv_config_port, | |
390 | .verify_port = sunhv_verify_port, | |
391 | }; | |
392 | ||
393 | static struct uart_driver sunhv_reg = { | |
394 | .owner = THIS_MODULE, | |
395 | .driver_name = "serial", | |
02fd473b DM |
396 | .dev_name = "ttyS", |
397 | .major = TTY_MAJOR, | |
398 | }; | |
399 | ||
400 | static struct uart_port *sunhv_port; | |
401 | ||
c7754d46 DM |
402 | /* Copy 's' into the con_write_page, decoding "\n" into |
403 | * "\r\n" along the way. We have to return two lengths | |
404 | * because the caller needs to know how much to advance | |
405 | * 's' and also how many bytes to output via con_write_page. | |
406 | */ | |
407 | static int fill_con_write_page(const char *s, unsigned int n, | |
408 | unsigned long *page_bytes) | |
409 | { | |
410 | const char *orig_s = s; | |
411 | char *p = con_write_page; | |
412 | int left = PAGE_SIZE; | |
413 | ||
414 | while (n--) { | |
415 | if (*s == '\n') { | |
416 | if (left < 2) | |
417 | break; | |
418 | *p++ = '\r'; | |
419 | left--; | |
420 | } else if (left < 1) | |
421 | break; | |
422 | *p++ = *s++; | |
423 | left--; | |
424 | } | |
425 | *page_bytes = p - con_write_page; | |
426 | return s - orig_s; | |
427 | } | |
428 | ||
429 | static void sunhv_console_write_paged(struct console *con, const char *s, unsigned n) | |
02fd473b | 430 | { |
c7754d46 | 431 | struct uart_port *port = sunhv_port; |
02fd473b | 432 | unsigned long flags; |
f3c681c0 DM |
433 | int locked = 1; |
434 | ||
435 | local_irq_save(flags); | |
436 | if (port->sysrq) { | |
437 | locked = 0; | |
438 | } else if (oops_in_progress) { | |
439 | locked = spin_trylock(&port->lock); | |
440 | } else | |
441 | spin_lock(&port->lock); | |
02fd473b | 442 | |
c7754d46 DM |
443 | while (n > 0) { |
444 | unsigned long ra = __pa(con_write_page); | |
445 | unsigned long page_bytes; | |
446 | unsigned int cpy = fill_con_write_page(s, n, | |
447 | &page_bytes); | |
448 | ||
449 | n -= cpy; | |
450 | s += cpy; | |
451 | while (page_bytes > 0) { | |
452 | unsigned long written; | |
453 | int limit = 1000000; | |
454 | ||
455 | while (limit--) { | |
456 | unsigned long stat; | |
457 | ||
458 | stat = sun4v_con_write(ra, page_bytes, | |
459 | &written); | |
460 | if (stat == HV_EOK) | |
461 | break; | |
462 | udelay(1); | |
463 | } | |
464 | if (limit <= 0) | |
465 | break; | |
466 | page_bytes -= written; | |
467 | ra += written; | |
468 | } | |
469 | } | |
f3c681c0 DM |
470 | |
471 | if (locked) | |
472 | spin_unlock(&port->lock); | |
473 | local_irq_restore(flags); | |
c7754d46 DM |
474 | } |
475 | ||
476 | static inline void sunhv_console_putchar(struct uart_port *port, char c) | |
477 | { | |
478 | int limit = 1000000; | |
02fd473b DM |
479 | |
480 | while (limit-- > 0) { | |
c7754d46 | 481 | long status = sun4v_con_putchar(c); |
02fd473b DM |
482 | if (status == HV_EOK) |
483 | break; | |
c7754d46 | 484 | udelay(1); |
02fd473b | 485 | } |
02fd473b DM |
486 | } |
487 | ||
c7754d46 | 488 | static void sunhv_console_write_bychar(struct console *con, const char *s, unsigned n) |
02fd473b DM |
489 | { |
490 | struct uart_port *port = sunhv_port; | |
c7754d46 | 491 | unsigned long flags; |
f3c681c0 DM |
492 | int i, locked = 1; |
493 | ||
494 | local_irq_save(flags); | |
495 | if (port->sysrq) { | |
496 | locked = 0; | |
497 | } else if (oops_in_progress) { | |
498 | locked = spin_trylock(&port->lock); | |
499 | } else | |
500 | spin_lock(&port->lock); | |
02fd473b | 501 | |
c7754d46 | 502 | spin_lock_irqsave(&port->lock, flags); |
02fd473b DM |
503 | for (i = 0; i < n; i++) { |
504 | if (*s == '\n') | |
505 | sunhv_console_putchar(port, '\r'); | |
506 | sunhv_console_putchar(port, *s++); | |
507 | } | |
f3c681c0 DM |
508 | |
509 | if (locked) | |
510 | spin_unlock(&port->lock); | |
511 | local_irq_restore(flags); | |
02fd473b DM |
512 | } |
513 | ||
02fd473b | 514 | static struct console sunhv_console = { |
d5a2aa24 | 515 | .name = "ttyHV", |
c7754d46 | 516 | .write = sunhv_console_write_bychar, |
02fd473b | 517 | .device = uart_console_device, |
02fd473b DM |
518 | .flags = CON_PRINTBUFFER, |
519 | .index = -1, | |
520 | .data = &sunhv_reg, | |
521 | }; | |
522 | ||
93872ba2 | 523 | static int __devinit hv_probe(struct of_device *op, const struct of_device_id *match) |
02fd473b DM |
524 | { |
525 | struct uart_port *port; | |
c7754d46 | 526 | unsigned long minor; |
93872ba2 | 527 | int err; |
02fd473b | 528 | |
93872ba2 | 529 | if (op->irqs[0] == 0xffffffff) |
02fd473b DM |
530 | return -ENODEV; |
531 | ||
93872ba2 | 532 | port = kzalloc(sizeof(struct uart_port), GFP_KERNEL); |
02fd473b DM |
533 | if (unlikely(!port)) |
534 | return -ENOMEM; | |
535 | ||
c7754d46 DM |
536 | minor = 1; |
537 | if (sun4v_hvapi_register(HV_GRP_CORE, 1, &minor) == 0 && | |
538 | minor >= 1) { | |
539 | err = -ENOMEM; | |
540 | con_write_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
541 | if (!con_write_page) | |
542 | goto out_free_port; | |
543 | ||
544 | con_read_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
545 | if (!con_read_page) | |
546 | goto out_free_con_write_page; | |
547 | ||
548 | sunhv_console.write = sunhv_console_write_paged; | |
549 | sunhv_ops = &bywrite_ops; | |
550 | } | |
551 | ||
93872ba2 | 552 | sunhv_port = port; |
db33f9bc | 553 | |
02fd473b DM |
554 | port->line = 0; |
555 | port->ops = &sunhv_pops; | |
556 | port->type = PORT_SUNHV; | |
557 | port->uartclk = ( 29491200 / 16 ); /* arbitrary */ | |
558 | ||
db33f9bc DM |
559 | port->membase = (unsigned char __iomem *) __pa(port); |
560 | ||
93872ba2 DM |
561 | port->irq = op->irqs[0]; |
562 | ||
563 | port->dev = &op->dev; | |
02fd473b DM |
564 | |
565 | sunhv_reg.minor = sunserial_current_minor; | |
566 | sunhv_reg.nr = 1; | |
02fd473b | 567 | |
93872ba2 DM |
568 | err = uart_register_driver(&sunhv_reg); |
569 | if (err) | |
c7754d46 | 570 | goto out_free_con_read_page; |
02fd473b | 571 | |
f5deb807 | 572 | sunhv_reg.tty_driver->name_base = sunhv_reg.minor - 64; |
02fd473b DM |
573 | sunserial_current_minor += 1; |
574 | ||
c73fcc84 DM |
575 | sunserial_console_match(&sunhv_console, op->node, |
576 | &sunhv_reg, port->line); | |
d5a2aa24 | 577 | |
93872ba2 DM |
578 | err = uart_add_one_port(&sunhv_reg, port); |
579 | if (err) | |
580 | goto out_unregister_driver; | |
02fd473b | 581 | |
93872ba2 DM |
582 | err = request_irq(port->irq, sunhv_interrupt, 0, "hvcons", port); |
583 | if (err) | |
584 | goto out_remove_port; | |
db33f9bc | 585 | |
93872ba2 | 586 | dev_set_drvdata(&op->dev, port); |
02fd473b DM |
587 | |
588 | return 0; | |
93872ba2 DM |
589 | |
590 | out_remove_port: | |
591 | uart_remove_one_port(&sunhv_reg, port); | |
592 | ||
593 | out_unregister_driver: | |
594 | sunserial_current_minor -= 1; | |
595 | uart_unregister_driver(&sunhv_reg); | |
596 | ||
c7754d46 DM |
597 | out_free_con_read_page: |
598 | kfree(con_read_page); | |
599 | ||
600 | out_free_con_write_page: | |
601 | kfree(con_write_page); | |
602 | ||
93872ba2 DM |
603 | out_free_port: |
604 | kfree(port); | |
605 | sunhv_port = NULL; | |
606 | return err; | |
02fd473b DM |
607 | } |
608 | ||
93872ba2 | 609 | static int __devexit hv_remove(struct of_device *dev) |
02fd473b | 610 | { |
93872ba2 | 611 | struct uart_port *port = dev_get_drvdata(&dev->dev); |
02fd473b | 612 | |
db33f9bc DM |
613 | free_irq(port->irq, port); |
614 | ||
02fd473b | 615 | uart_remove_one_port(&sunhv_reg, port); |
02fd473b | 616 | |
93872ba2 | 617 | sunserial_current_minor -= 1; |
02fd473b DM |
618 | uart_unregister_driver(&sunhv_reg); |
619 | ||
93872ba2 | 620 | kfree(port); |
02fd473b | 621 | sunhv_port = NULL; |
93872ba2 DM |
622 | |
623 | dev_set_drvdata(&dev->dev, NULL); | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | static struct of_device_id hv_match[] = { | |
629 | { | |
630 | .name = "console", | |
631 | .compatible = "qcn", | |
632 | }, | |
7a05b591 DM |
633 | { |
634 | .name = "console", | |
635 | .compatible = "SUNW,sun4v-console", | |
636 | }, | |
93872ba2 DM |
637 | {}, |
638 | }; | |
639 | MODULE_DEVICE_TABLE(of, hv_match); | |
640 | ||
641 | static struct of_platform_driver hv_driver = { | |
642 | .name = "hv", | |
643 | .match_table = hv_match, | |
644 | .probe = hv_probe, | |
645 | .remove = __devexit_p(hv_remove), | |
646 | }; | |
647 | ||
648 | static int __init sunhv_init(void) | |
649 | { | |
650 | if (tlb_type != hypervisor) | |
651 | return -ENODEV; | |
652 | ||
653 | return of_register_driver(&hv_driver, &of_bus_type); | |
654 | } | |
655 | ||
656 | static void __exit sunhv_exit(void) | |
657 | { | |
658 | of_unregister_driver(&hv_driver); | |
02fd473b DM |
659 | } |
660 | ||
661 | module_init(sunhv_init); | |
662 | module_exit(sunhv_exit); | |
663 | ||
664 | MODULE_AUTHOR("David S. Miller"); | |
93872ba2 DM |
665 | MODULE_DESCRIPTION("SUN4V Hypervisor console driver"); |
666 | MODULE_VERSION("2.0"); | |
02fd473b | 667 | MODULE_LICENSE("GPL"); |