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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 | { | |
261 | struct circ_buf *xmit = &port->info->xmit; | |
02fd473b DM |
262 | |
263 | while (!uart_circ_empty(xmit)) { | |
c7754d46 | 264 | long status = sun4v_con_putchar(xmit->buf[xmit->tail]); |
02fd473b DM |
265 | |
266 | if (status != HV_EOK) | |
267 | break; | |
268 | ||
269 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
270 | port->icount.tx++; | |
271 | } | |
02fd473b DM |
272 | } |
273 | ||
274 | /* port->lock is not held. */ | |
275 | static void sunhv_send_xchar(struct uart_port *port, char ch) | |
276 | { | |
277 | unsigned long flags; | |
278 | int limit = 10000; | |
279 | ||
280 | spin_lock_irqsave(&port->lock, flags); | |
281 | ||
282 | while (limit-- > 0) { | |
c7754d46 | 283 | long status = sun4v_con_putchar(ch); |
02fd473b DM |
284 | if (status == HV_EOK) |
285 | break; | |
c7754d46 | 286 | udelay(1); |
02fd473b DM |
287 | } |
288 | ||
289 | spin_unlock_irqrestore(&port->lock, flags); | |
290 | } | |
291 | ||
292 | /* port->lock held by caller. */ | |
293 | static void sunhv_stop_rx(struct uart_port *port) | |
294 | { | |
295 | } | |
296 | ||
297 | /* port->lock held by caller. */ | |
298 | static void sunhv_enable_ms(struct uart_port *port) | |
299 | { | |
300 | } | |
301 | ||
302 | /* port->lock is not held. */ | |
303 | static void sunhv_break_ctl(struct uart_port *port, int break_state) | |
304 | { | |
305 | if (break_state) { | |
306 | unsigned long flags; | |
c7754d46 | 307 | int limit = 10000; |
02fd473b DM |
308 | |
309 | spin_lock_irqsave(&port->lock, flags); | |
310 | ||
311 | while (limit-- > 0) { | |
c7754d46 | 312 | long status = sun4v_con_putchar(CON_BREAK); |
02fd473b DM |
313 | if (status == HV_EOK) |
314 | break; | |
c7754d46 | 315 | udelay(1); |
02fd473b DM |
316 | } |
317 | ||
318 | spin_unlock_irqrestore(&port->lock, flags); | |
319 | } | |
320 | } | |
321 | ||
322 | /* port->lock is not held. */ | |
323 | static int sunhv_startup(struct uart_port *port) | |
324 | { | |
325 | return 0; | |
326 | } | |
327 | ||
328 | /* port->lock is not held. */ | |
329 | static void sunhv_shutdown(struct uart_port *port) | |
330 | { | |
331 | } | |
332 | ||
333 | /* port->lock is not held. */ | |
606d099c AC |
334 | static void sunhv_set_termios(struct uart_port *port, struct ktermios *termios, |
335 | struct ktermios *old) | |
02fd473b DM |
336 | { |
337 | unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); | |
338 | unsigned int quot = uart_get_divisor(port, baud); | |
339 | unsigned int iflag, cflag; | |
340 | unsigned long flags; | |
341 | ||
342 | spin_lock_irqsave(&port->lock, flags); | |
343 | ||
344 | iflag = termios->c_iflag; | |
345 | cflag = termios->c_cflag; | |
346 | ||
347 | port->ignore_status_mask = 0; | |
348 | if (iflag & IGNBRK) | |
349 | port->ignore_status_mask |= IGNORE_BREAK; | |
350 | if ((cflag & CREAD) == 0) | |
351 | port->ignore_status_mask |= IGNORE_ALL; | |
352 | ||
353 | /* XXX */ | |
354 | uart_update_timeout(port, cflag, | |
355 | (port->uartclk / (16 * quot))); | |
356 | ||
357 | spin_unlock_irqrestore(&port->lock, flags); | |
358 | } | |
359 | ||
360 | static const char *sunhv_type(struct uart_port *port) | |
361 | { | |
362 | return "SUN4V HCONS"; | |
363 | } | |
364 | ||
365 | static void sunhv_release_port(struct uart_port *port) | |
366 | { | |
367 | } | |
368 | ||
369 | static int sunhv_request_port(struct uart_port *port) | |
370 | { | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static void sunhv_config_port(struct uart_port *port, int flags) | |
375 | { | |
376 | } | |
377 | ||
378 | static int sunhv_verify_port(struct uart_port *port, struct serial_struct *ser) | |
379 | { | |
380 | return -EINVAL; | |
381 | } | |
382 | ||
383 | static struct uart_ops sunhv_pops = { | |
384 | .tx_empty = sunhv_tx_empty, | |
385 | .set_mctrl = sunhv_set_mctrl, | |
386 | .get_mctrl = sunhv_get_mctrl, | |
387 | .stop_tx = sunhv_stop_tx, | |
388 | .start_tx = sunhv_start_tx, | |
389 | .send_xchar = sunhv_send_xchar, | |
390 | .stop_rx = sunhv_stop_rx, | |
391 | .enable_ms = sunhv_enable_ms, | |
392 | .break_ctl = sunhv_break_ctl, | |
393 | .startup = sunhv_startup, | |
394 | .shutdown = sunhv_shutdown, | |
395 | .set_termios = sunhv_set_termios, | |
396 | .type = sunhv_type, | |
397 | .release_port = sunhv_release_port, | |
398 | .request_port = sunhv_request_port, | |
399 | .config_port = sunhv_config_port, | |
400 | .verify_port = sunhv_verify_port, | |
401 | }; | |
402 | ||
403 | static struct uart_driver sunhv_reg = { | |
404 | .owner = THIS_MODULE, | |
405 | .driver_name = "serial", | |
02fd473b DM |
406 | .dev_name = "ttyS", |
407 | .major = TTY_MAJOR, | |
408 | }; | |
409 | ||
410 | static struct uart_port *sunhv_port; | |
411 | ||
c7754d46 DM |
412 | /* Copy 's' into the con_write_page, decoding "\n" into |
413 | * "\r\n" along the way. We have to return two lengths | |
414 | * because the caller needs to know how much to advance | |
415 | * 's' and also how many bytes to output via con_write_page. | |
416 | */ | |
417 | static int fill_con_write_page(const char *s, unsigned int n, | |
418 | unsigned long *page_bytes) | |
419 | { | |
420 | const char *orig_s = s; | |
421 | char *p = con_write_page; | |
422 | int left = PAGE_SIZE; | |
423 | ||
424 | while (n--) { | |
425 | if (*s == '\n') { | |
426 | if (left < 2) | |
427 | break; | |
428 | *p++ = '\r'; | |
429 | left--; | |
430 | } else if (left < 1) | |
431 | break; | |
432 | *p++ = *s++; | |
433 | left--; | |
434 | } | |
435 | *page_bytes = p - con_write_page; | |
436 | return s - orig_s; | |
437 | } | |
438 | ||
439 | static void sunhv_console_write_paged(struct console *con, const char *s, unsigned n) | |
02fd473b | 440 | { |
c7754d46 | 441 | struct uart_port *port = sunhv_port; |
02fd473b | 442 | unsigned long flags; |
f3c681c0 DM |
443 | int locked = 1; |
444 | ||
445 | local_irq_save(flags); | |
446 | if (port->sysrq) { | |
447 | locked = 0; | |
448 | } else if (oops_in_progress) { | |
449 | locked = spin_trylock(&port->lock); | |
450 | } else | |
451 | spin_lock(&port->lock); | |
02fd473b | 452 | |
c7754d46 DM |
453 | while (n > 0) { |
454 | unsigned long ra = __pa(con_write_page); | |
455 | unsigned long page_bytes; | |
456 | unsigned int cpy = fill_con_write_page(s, n, | |
457 | &page_bytes); | |
458 | ||
459 | n -= cpy; | |
460 | s += cpy; | |
461 | while (page_bytes > 0) { | |
462 | unsigned long written; | |
463 | int limit = 1000000; | |
464 | ||
465 | while (limit--) { | |
466 | unsigned long stat; | |
467 | ||
468 | stat = sun4v_con_write(ra, page_bytes, | |
469 | &written); | |
470 | if (stat == HV_EOK) | |
471 | break; | |
472 | udelay(1); | |
473 | } | |
474 | if (limit <= 0) | |
475 | break; | |
476 | page_bytes -= written; | |
477 | ra += written; | |
478 | } | |
479 | } | |
f3c681c0 DM |
480 | |
481 | if (locked) | |
482 | spin_unlock(&port->lock); | |
483 | local_irq_restore(flags); | |
c7754d46 DM |
484 | } |
485 | ||
486 | static inline void sunhv_console_putchar(struct uart_port *port, char c) | |
487 | { | |
488 | int limit = 1000000; | |
02fd473b DM |
489 | |
490 | while (limit-- > 0) { | |
c7754d46 | 491 | long status = sun4v_con_putchar(c); |
02fd473b DM |
492 | if (status == HV_EOK) |
493 | break; | |
c7754d46 | 494 | udelay(1); |
02fd473b | 495 | } |
02fd473b DM |
496 | } |
497 | ||
c7754d46 | 498 | static void sunhv_console_write_bychar(struct console *con, const char *s, unsigned n) |
02fd473b DM |
499 | { |
500 | struct uart_port *port = sunhv_port; | |
c7754d46 | 501 | unsigned long flags; |
f3c681c0 DM |
502 | int i, locked = 1; |
503 | ||
504 | local_irq_save(flags); | |
505 | if (port->sysrq) { | |
506 | locked = 0; | |
507 | } else if (oops_in_progress) { | |
508 | locked = spin_trylock(&port->lock); | |
509 | } else | |
510 | spin_lock(&port->lock); | |
02fd473b | 511 | |
c7754d46 | 512 | spin_lock_irqsave(&port->lock, flags); |
02fd473b DM |
513 | for (i = 0; i < n; i++) { |
514 | if (*s == '\n') | |
515 | sunhv_console_putchar(port, '\r'); | |
516 | sunhv_console_putchar(port, *s++); | |
517 | } | |
f3c681c0 DM |
518 | |
519 | if (locked) | |
520 | spin_unlock(&port->lock); | |
521 | local_irq_restore(flags); | |
02fd473b DM |
522 | } |
523 | ||
02fd473b | 524 | static struct console sunhv_console = { |
d5a2aa24 | 525 | .name = "ttyHV", |
c7754d46 | 526 | .write = sunhv_console_write_bychar, |
02fd473b | 527 | .device = uart_console_device, |
02fd473b DM |
528 | .flags = CON_PRINTBUFFER, |
529 | .index = -1, | |
530 | .data = &sunhv_reg, | |
531 | }; | |
532 | ||
d5a2aa24 | 533 | static inline struct console *SUNHV_CONSOLE(void) |
02fd473b DM |
534 | { |
535 | if (con_is_present()) | |
d5a2aa24 | 536 | return NULL; |
02fd473b DM |
537 | |
538 | sunhv_console.index = 0; | |
d5a2aa24 DM |
539 | |
540 | return &sunhv_console; | |
02fd473b DM |
541 | } |
542 | ||
93872ba2 | 543 | static int __devinit hv_probe(struct of_device *op, const struct of_device_id *match) |
02fd473b DM |
544 | { |
545 | struct uart_port *port; | |
c7754d46 | 546 | unsigned long minor; |
93872ba2 | 547 | int err; |
02fd473b | 548 | |
93872ba2 | 549 | if (op->irqs[0] == 0xffffffff) |
02fd473b DM |
550 | return -ENODEV; |
551 | ||
93872ba2 | 552 | port = kzalloc(sizeof(struct uart_port), GFP_KERNEL); |
02fd473b DM |
553 | if (unlikely(!port)) |
554 | return -ENOMEM; | |
555 | ||
c7754d46 DM |
556 | minor = 1; |
557 | if (sun4v_hvapi_register(HV_GRP_CORE, 1, &minor) == 0 && | |
558 | minor >= 1) { | |
559 | err = -ENOMEM; | |
560 | con_write_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
561 | if (!con_write_page) | |
562 | goto out_free_port; | |
563 | ||
564 | con_read_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
565 | if (!con_read_page) | |
566 | goto out_free_con_write_page; | |
567 | ||
568 | sunhv_console.write = sunhv_console_write_paged; | |
569 | sunhv_ops = &bywrite_ops; | |
570 | } | |
571 | ||
93872ba2 | 572 | sunhv_port = port; |
db33f9bc | 573 | |
02fd473b DM |
574 | port->line = 0; |
575 | port->ops = &sunhv_pops; | |
576 | port->type = PORT_SUNHV; | |
577 | port->uartclk = ( 29491200 / 16 ); /* arbitrary */ | |
578 | ||
db33f9bc DM |
579 | port->membase = (unsigned char __iomem *) __pa(port); |
580 | ||
93872ba2 DM |
581 | port->irq = op->irqs[0]; |
582 | ||
583 | port->dev = &op->dev; | |
02fd473b DM |
584 | |
585 | sunhv_reg.minor = sunserial_current_minor; | |
586 | sunhv_reg.nr = 1; | |
02fd473b | 587 | |
93872ba2 DM |
588 | err = uart_register_driver(&sunhv_reg); |
589 | if (err) | |
c7754d46 | 590 | goto out_free_con_read_page; |
02fd473b | 591 | |
f5deb807 | 592 | sunhv_reg.tty_driver->name_base = sunhv_reg.minor - 64; |
02fd473b DM |
593 | sunserial_current_minor += 1; |
594 | ||
d5a2aa24 DM |
595 | sunhv_reg.cons = SUNHV_CONSOLE(); |
596 | ||
93872ba2 DM |
597 | err = uart_add_one_port(&sunhv_reg, port); |
598 | if (err) | |
599 | goto out_unregister_driver; | |
02fd473b | 600 | |
93872ba2 DM |
601 | err = request_irq(port->irq, sunhv_interrupt, 0, "hvcons", port); |
602 | if (err) | |
603 | goto out_remove_port; | |
db33f9bc | 604 | |
93872ba2 | 605 | dev_set_drvdata(&op->dev, port); |
02fd473b DM |
606 | |
607 | return 0; | |
93872ba2 DM |
608 | |
609 | out_remove_port: | |
610 | uart_remove_one_port(&sunhv_reg, port); | |
611 | ||
612 | out_unregister_driver: | |
613 | sunserial_current_minor -= 1; | |
614 | uart_unregister_driver(&sunhv_reg); | |
615 | ||
c7754d46 DM |
616 | out_free_con_read_page: |
617 | kfree(con_read_page); | |
618 | ||
619 | out_free_con_write_page: | |
620 | kfree(con_write_page); | |
621 | ||
93872ba2 DM |
622 | out_free_port: |
623 | kfree(port); | |
624 | sunhv_port = NULL; | |
625 | return err; | |
02fd473b DM |
626 | } |
627 | ||
93872ba2 | 628 | static int __devexit hv_remove(struct of_device *dev) |
02fd473b | 629 | { |
93872ba2 | 630 | struct uart_port *port = dev_get_drvdata(&dev->dev); |
02fd473b | 631 | |
db33f9bc DM |
632 | free_irq(port->irq, port); |
633 | ||
02fd473b | 634 | uart_remove_one_port(&sunhv_reg, port); |
02fd473b | 635 | |
93872ba2 | 636 | sunserial_current_minor -= 1; |
02fd473b DM |
637 | uart_unregister_driver(&sunhv_reg); |
638 | ||
93872ba2 | 639 | kfree(port); |
02fd473b | 640 | sunhv_port = NULL; |
93872ba2 DM |
641 | |
642 | dev_set_drvdata(&dev->dev, NULL); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | static struct of_device_id hv_match[] = { | |
648 | { | |
649 | .name = "console", | |
650 | .compatible = "qcn", | |
651 | }, | |
7a05b591 DM |
652 | { |
653 | .name = "console", | |
654 | .compatible = "SUNW,sun4v-console", | |
655 | }, | |
93872ba2 DM |
656 | {}, |
657 | }; | |
658 | MODULE_DEVICE_TABLE(of, hv_match); | |
659 | ||
660 | static struct of_platform_driver hv_driver = { | |
661 | .name = "hv", | |
662 | .match_table = hv_match, | |
663 | .probe = hv_probe, | |
664 | .remove = __devexit_p(hv_remove), | |
665 | }; | |
666 | ||
667 | static int __init sunhv_init(void) | |
668 | { | |
669 | if (tlb_type != hypervisor) | |
670 | return -ENODEV; | |
671 | ||
672 | return of_register_driver(&hv_driver, &of_bus_type); | |
673 | } | |
674 | ||
675 | static void __exit sunhv_exit(void) | |
676 | { | |
677 | of_unregister_driver(&hv_driver); | |
02fd473b DM |
678 | } |
679 | ||
680 | module_init(sunhv_init); | |
681 | module_exit(sunhv_exit); | |
682 | ||
683 | MODULE_AUTHOR("David S. Miller"); | |
93872ba2 DM |
684 | MODULE_DESCRIPTION("SUN4V Hypervisor console driver"); |
685 | MODULE_VERSION("2.0"); | |
02fd473b | 686 | MODULE_LICENSE("GPL"); |