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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 | ||
02fd473b DM |
6 | #include <linux/kernel.h> |
7 | #include <linux/errno.h> | |
8 | #include <linux/tty.h> | |
9 | #include <linux/tty_flip.h> | |
10 | #include <linux/major.h> | |
11 | #include <linux/circ_buf.h> | |
12 | #include <linux/serial.h> | |
13 | #include <linux/sysrq.h> | |
14 | #include <linux/console.h> | |
15 | #include <linux/spinlock.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/init.h> | |
c6ed413d | 19 | #include <linux/of_device.h> |
02fd473b DM |
20 | |
21 | #include <asm/hypervisor.h> | |
22 | #include <asm/spitfire.h> | |
93872ba2 | 23 | #include <asm/prom.h> |
f4266ab4 | 24 | #include <asm/irq.h> |
d550bbd4 | 25 | #include <asm/setup.h> |
02fd473b DM |
26 | |
27 | #if defined(CONFIG_MAGIC_SYSRQ) | |
28 | #define SUPPORT_SYSRQ | |
29 | #endif | |
30 | ||
31 | #include <linux/serial_core.h> | |
6816383a | 32 | #include <linux/sunserialcore.h> |
02fd473b DM |
33 | |
34 | #define CON_BREAK ((long)-1) | |
35 | #define CON_HUP ((long)-2) | |
36 | ||
c7754d46 DM |
37 | #define IGNORE_BREAK 0x1 |
38 | #define IGNORE_ALL 0x2 | |
02fd473b | 39 | |
c7754d46 DM |
40 | static char *con_write_page; |
41 | static char *con_read_page; | |
02fd473b | 42 | |
c7754d46 | 43 | static int hung_up = 0; |
02fd473b | 44 | |
c7754d46 | 45 | static void transmit_chars_putchar(struct uart_port *port, struct circ_buf *xmit) |
02fd473b | 46 | { |
c7754d46 DM |
47 | while (!uart_circ_empty(xmit)) { |
48 | long status = sun4v_con_putchar(xmit->buf[xmit->tail]); | |
02fd473b | 49 | |
c7754d46 DM |
50 | if (status != HV_EOK) |
51 | break; | |
02fd473b | 52 | |
c7754d46 DM |
53 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
54 | port->icount.tx++; | |
55 | } | |
02fd473b DM |
56 | } |
57 | ||
c7754d46 DM |
58 | static void transmit_chars_write(struct uart_port *port, struct circ_buf *xmit) |
59 | { | |
60 | while (!uart_circ_empty(xmit)) { | |
61 | unsigned long ra = __pa(xmit->buf + xmit->tail); | |
62 | unsigned long len, status, sent; | |
02fd473b | 63 | |
c7754d46 DM |
64 | len = CIRC_CNT_TO_END(xmit->head, xmit->tail, |
65 | UART_XMIT_SIZE); | |
66 | status = sun4v_con_write(ra, len, &sent); | |
67 | if (status != HV_EOK) | |
68 | break; | |
69 | xmit->tail = (xmit->tail + sent) & (UART_XMIT_SIZE - 1); | |
70 | port->icount.tx += sent; | |
71 | } | |
72 | } | |
02fd473b | 73 | |
05c7cd39 | 74 | static int receive_chars_getchar(struct uart_port *port) |
02fd473b | 75 | { |
02fd473b DM |
76 | int saw_console_brk = 0; |
77 | int limit = 10000; | |
78 | ||
02fd473b DM |
79 | while (limit-- > 0) { |
80 | long status; | |
c7754d46 | 81 | long c = sun4v_con_getchar(&status); |
02fd473b DM |
82 | |
83 | if (status == HV_EWOULDBLOCK) | |
84 | break; | |
85 | ||
86 | if (c == CON_BREAK) { | |
135066a2 DM |
87 | if (uart_handle_break(port)) |
88 | continue; | |
02fd473b DM |
89 | saw_console_brk = 1; |
90 | c = 0; | |
91 | } | |
92 | ||
93 | if (c == CON_HUP) { | |
94 | hung_up = 1; | |
95 | uart_handle_dcd_change(port, 0); | |
96 | } else if (hung_up) { | |
97 | hung_up = 0; | |
98 | uart_handle_dcd_change(port, 1); | |
99 | } | |
100 | ||
92a19f9c | 101 | if (port->state == NULL) { |
7d12e780 | 102 | uart_handle_sysrq_char(port, c); |
02fd473b DM |
103 | continue; |
104 | } | |
105 | ||
02fd473b | 106 | port->icount.rx++; |
02fd473b | 107 | |
7d12e780 | 108 | if (uart_handle_sysrq_char(port, c)) |
02fd473b DM |
109 | continue; |
110 | ||
92a19f9c | 111 | tty_insert_flip_char(&port->state->port, c, TTY_NORMAL); |
c7754d46 DM |
112 | } |
113 | ||
114 | return saw_console_brk; | |
115 | } | |
116 | ||
05c7cd39 | 117 | static int receive_chars_read(struct uart_port *port) |
c7754d46 DM |
118 | { |
119 | int saw_console_brk = 0; | |
120 | int limit = 10000; | |
121 | ||
122 | while (limit-- > 0) { | |
123 | unsigned long ra = __pa(con_read_page); | |
124 | unsigned long bytes_read, i; | |
125 | long stat = sun4v_con_read(ra, PAGE_SIZE, &bytes_read); | |
126 | ||
127 | if (stat != HV_EOK) { | |
128 | bytes_read = 0; | |
129 | ||
130 | if (stat == CON_BREAK) { | |
131 | if (uart_handle_break(port)) | |
132 | continue; | |
133 | saw_console_brk = 1; | |
134 | *con_read_page = 0; | |
135 | bytes_read = 1; | |
136 | } else if (stat == CON_HUP) { | |
137 | hung_up = 1; | |
138 | uart_handle_dcd_change(port, 0); | |
139 | continue; | |
140 | } else { | |
141 | /* HV_EWOULDBLOCK, etc. */ | |
142 | break; | |
143 | } | |
144 | } | |
145 | ||
146 | if (hung_up) { | |
147 | hung_up = 0; | |
148 | uart_handle_dcd_change(port, 1); | |
149 | } | |
150 | ||
151 | for (i = 0; i < bytes_read; i++) | |
152 | uart_handle_sysrq_char(port, con_read_page[i]); | |
153 | ||
05c7cd39 | 154 | if (port->state == NULL) |
02fd473b DM |
155 | continue; |
156 | ||
c7754d46 DM |
157 | port->icount.rx += bytes_read; |
158 | ||
05c7cd39 JS |
159 | tty_insert_flip_string(&port->state->port, con_read_page, |
160 | 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); | |
05c7cd39 | 168 | int (*receive_chars)(struct uart_port *port); |
c7754d46 DM |
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 | ||
2e124b4a | 183 | static struct tty_port *receive_chars(struct uart_port *port) |
c7754d46 | 184 | { |
2e124b4a | 185 | struct tty_port *tport = NULL; |
c7754d46 | 186 | |
ebd2c8f6 | 187 | if (port->state != NULL) /* Unopened serial console */ |
2e124b4a | 188 | tport = &port->state->port; |
c7754d46 | 189 | |
05c7cd39 | 190 | if (sunhv_ops->receive_chars(port)) |
02fd473b DM |
191 | sun_do_break(); |
192 | ||
2e124b4a | 193 | return tport; |
02fd473b DM |
194 | } |
195 | ||
196 | static void transmit_chars(struct uart_port *port) | |
197 | { | |
db33f9bc DM |
198 | struct circ_buf *xmit; |
199 | ||
ebd2c8f6 | 200 | if (!port->state) |
db33f9bc | 201 | return; |
02fd473b | 202 | |
ebd2c8f6 | 203 | xmit = &port->state->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; | |
2e124b4a | 216 | struct tty_port *tport; |
02fd473b DM |
217 | unsigned long flags; |
218 | ||
219 | spin_lock_irqsave(&port->lock, flags); | |
2e124b4a | 220 | tport = receive_chars(port); |
02fd473b DM |
221 | transmit_chars(port); |
222 | spin_unlock_irqrestore(&port->lock, flags); | |
223 | ||
2e124b4a JS |
224 | if (tport) |
225 | tty_flip_buffer_push(tport); | |
02fd473b DM |
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 | ||
db106df3 PH |
270 | if (ch == __DISABLED_CHAR) |
271 | return; | |
272 | ||
02fd473b DM |
273 | spin_lock_irqsave(&port->lock, flags); |
274 | ||
275 | while (limit-- > 0) { | |
c7754d46 | 276 | long status = sun4v_con_putchar(ch); |
02fd473b DM |
277 | if (status == HV_EOK) |
278 | break; | |
c7754d46 | 279 | udelay(1); |
02fd473b DM |
280 | } |
281 | ||
282 | spin_unlock_irqrestore(&port->lock, flags); | |
283 | } | |
284 | ||
285 | /* port->lock held by caller. */ | |
286 | static void sunhv_stop_rx(struct uart_port *port) | |
287 | { | |
288 | } | |
289 | ||
02fd473b DM |
290 | /* port->lock is not held. */ |
291 | static void sunhv_break_ctl(struct uart_port *port, int break_state) | |
292 | { | |
293 | if (break_state) { | |
294 | unsigned long flags; | |
c7754d46 | 295 | int limit = 10000; |
02fd473b DM |
296 | |
297 | spin_lock_irqsave(&port->lock, flags); | |
298 | ||
299 | while (limit-- > 0) { | |
c7754d46 | 300 | long status = sun4v_con_putchar(CON_BREAK); |
02fd473b DM |
301 | if (status == HV_EOK) |
302 | break; | |
c7754d46 | 303 | udelay(1); |
02fd473b DM |
304 | } |
305 | ||
306 | spin_unlock_irqrestore(&port->lock, flags); | |
307 | } | |
308 | } | |
309 | ||
310 | /* port->lock is not held. */ | |
311 | static int sunhv_startup(struct uart_port *port) | |
312 | { | |
313 | return 0; | |
314 | } | |
315 | ||
316 | /* port->lock is not held. */ | |
317 | static void sunhv_shutdown(struct uart_port *port) | |
318 | { | |
319 | } | |
320 | ||
321 | /* port->lock is not held. */ | |
606d099c AC |
322 | static void sunhv_set_termios(struct uart_port *port, struct ktermios *termios, |
323 | struct ktermios *old) | |
02fd473b DM |
324 | { |
325 | unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); | |
326 | unsigned int quot = uart_get_divisor(port, baud); | |
327 | unsigned int iflag, cflag; | |
328 | unsigned long flags; | |
329 | ||
330 | spin_lock_irqsave(&port->lock, flags); | |
331 | ||
332 | iflag = termios->c_iflag; | |
333 | cflag = termios->c_cflag; | |
334 | ||
335 | port->ignore_status_mask = 0; | |
336 | if (iflag & IGNBRK) | |
337 | port->ignore_status_mask |= IGNORE_BREAK; | |
338 | if ((cflag & CREAD) == 0) | |
339 | port->ignore_status_mask |= IGNORE_ALL; | |
340 | ||
341 | /* XXX */ | |
342 | uart_update_timeout(port, cflag, | |
343 | (port->uartclk / (16 * quot))); | |
344 | ||
345 | spin_unlock_irqrestore(&port->lock, flags); | |
346 | } | |
347 | ||
348 | static const char *sunhv_type(struct uart_port *port) | |
349 | { | |
350 | return "SUN4V HCONS"; | |
351 | } | |
352 | ||
353 | static void sunhv_release_port(struct uart_port *port) | |
354 | { | |
355 | } | |
356 | ||
357 | static int sunhv_request_port(struct uart_port *port) | |
358 | { | |
359 | return 0; | |
360 | } | |
361 | ||
362 | static void sunhv_config_port(struct uart_port *port, int flags) | |
363 | { | |
364 | } | |
365 | ||
366 | static int sunhv_verify_port(struct uart_port *port, struct serial_struct *ser) | |
367 | { | |
368 | return -EINVAL; | |
369 | } | |
370 | ||
371 | static struct uart_ops sunhv_pops = { | |
372 | .tx_empty = sunhv_tx_empty, | |
373 | .set_mctrl = sunhv_set_mctrl, | |
374 | .get_mctrl = sunhv_get_mctrl, | |
375 | .stop_tx = sunhv_stop_tx, | |
376 | .start_tx = sunhv_start_tx, | |
377 | .send_xchar = sunhv_send_xchar, | |
378 | .stop_rx = sunhv_stop_rx, | |
02fd473b DM |
379 | .break_ctl = sunhv_break_ctl, |
380 | .startup = sunhv_startup, | |
381 | .shutdown = sunhv_shutdown, | |
382 | .set_termios = sunhv_set_termios, | |
383 | .type = sunhv_type, | |
384 | .release_port = sunhv_release_port, | |
385 | .request_port = sunhv_request_port, | |
386 | .config_port = sunhv_config_port, | |
387 | .verify_port = sunhv_verify_port, | |
388 | }; | |
389 | ||
390 | static struct uart_driver sunhv_reg = { | |
391 | .owner = THIS_MODULE, | |
32039f49 | 392 | .driver_name = "sunhv", |
02fd473b DM |
393 | .dev_name = "ttyS", |
394 | .major = TTY_MAJOR, | |
395 | }; | |
396 | ||
397 | static struct uart_port *sunhv_port; | |
398 | ||
c7754d46 DM |
399 | /* Copy 's' into the con_write_page, decoding "\n" into |
400 | * "\r\n" along the way. We have to return two lengths | |
401 | * because the caller needs to know how much to advance | |
402 | * 's' and also how many bytes to output via con_write_page. | |
403 | */ | |
404 | static int fill_con_write_page(const char *s, unsigned int n, | |
405 | unsigned long *page_bytes) | |
406 | { | |
407 | const char *orig_s = s; | |
408 | char *p = con_write_page; | |
409 | int left = PAGE_SIZE; | |
410 | ||
411 | while (n--) { | |
412 | if (*s == '\n') { | |
413 | if (left < 2) | |
414 | break; | |
415 | *p++ = '\r'; | |
416 | left--; | |
417 | } else if (left < 1) | |
418 | break; | |
419 | *p++ = *s++; | |
420 | left--; | |
421 | } | |
422 | *page_bytes = p - con_write_page; | |
423 | return s - orig_s; | |
424 | } | |
425 | ||
426 | static void sunhv_console_write_paged(struct console *con, const char *s, unsigned n) | |
02fd473b | 427 | { |
c7754d46 | 428 | struct uart_port *port = sunhv_port; |
02fd473b | 429 | unsigned long flags; |
f3c681c0 DM |
430 | int locked = 1; |
431 | ||
e58e241c DM |
432 | if (port->sysrq || oops_in_progress) |
433 | locked = spin_trylock_irqsave(&port->lock, flags); | |
434 | else | |
435 | spin_lock_irqsave(&port->lock, flags); | |
02fd473b | 436 | |
c7754d46 DM |
437 | while (n > 0) { |
438 | unsigned long ra = __pa(con_write_page); | |
439 | unsigned long page_bytes; | |
440 | unsigned int cpy = fill_con_write_page(s, n, | |
441 | &page_bytes); | |
442 | ||
443 | n -= cpy; | |
444 | s += cpy; | |
445 | while (page_bytes > 0) { | |
446 | unsigned long written; | |
447 | int limit = 1000000; | |
448 | ||
449 | while (limit--) { | |
450 | unsigned long stat; | |
451 | ||
452 | stat = sun4v_con_write(ra, page_bytes, | |
453 | &written); | |
454 | if (stat == HV_EOK) | |
455 | break; | |
456 | udelay(1); | |
457 | } | |
52e3632e | 458 | if (limit < 0) |
c7754d46 DM |
459 | break; |
460 | page_bytes -= written; | |
461 | ra += written; | |
462 | } | |
463 | } | |
f3c681c0 DM |
464 | |
465 | if (locked) | |
e58e241c | 466 | spin_unlock_irqrestore(&port->lock, flags); |
c7754d46 DM |
467 | } |
468 | ||
469 | static inline void sunhv_console_putchar(struct uart_port *port, char c) | |
470 | { | |
471 | int limit = 1000000; | |
02fd473b DM |
472 | |
473 | while (limit-- > 0) { | |
c7754d46 | 474 | long status = sun4v_con_putchar(c); |
02fd473b DM |
475 | if (status == HV_EOK) |
476 | break; | |
c7754d46 | 477 | udelay(1); |
02fd473b | 478 | } |
02fd473b DM |
479 | } |
480 | ||
c7754d46 | 481 | static void sunhv_console_write_bychar(struct console *con, const char *s, unsigned n) |
02fd473b DM |
482 | { |
483 | struct uart_port *port = sunhv_port; | |
c7754d46 | 484 | unsigned long flags; |
f3c681c0 DM |
485 | int i, locked = 1; |
486 | ||
e58e241c DM |
487 | if (port->sysrq || oops_in_progress) |
488 | locked = spin_trylock_irqsave(&port->lock, flags); | |
489 | else | |
490 | spin_lock_irqsave(&port->lock, flags); | |
f3c681c0 DM |
491 | if (port->sysrq) { |
492 | locked = 0; | |
493 | } else if (oops_in_progress) { | |
494 | locked = spin_trylock(&port->lock); | |
495 | } else | |
496 | spin_lock(&port->lock); | |
02fd473b DM |
497 | |
498 | for (i = 0; i < n; i++) { | |
499 | if (*s == '\n') | |
500 | sunhv_console_putchar(port, '\r'); | |
501 | sunhv_console_putchar(port, *s++); | |
502 | } | |
f3c681c0 DM |
503 | |
504 | if (locked) | |
e58e241c | 505 | spin_unlock_irqrestore(&port->lock, flags); |
02fd473b DM |
506 | } |
507 | ||
02fd473b | 508 | static struct console sunhv_console = { |
d5a2aa24 | 509 | .name = "ttyHV", |
c7754d46 | 510 | .write = sunhv_console_write_bychar, |
02fd473b | 511 | .device = uart_console_device, |
02fd473b DM |
512 | .flags = CON_PRINTBUFFER, |
513 | .index = -1, | |
514 | .data = &sunhv_reg, | |
515 | }; | |
516 | ||
9671f099 | 517 | static int hv_probe(struct platform_device *op) |
02fd473b DM |
518 | { |
519 | struct uart_port *port; | |
c7754d46 | 520 | unsigned long minor; |
93872ba2 | 521 | int err; |
02fd473b | 522 | |
1636f8ac | 523 | if (op->archdata.irqs[0] == 0xffffffff) |
02fd473b DM |
524 | return -ENODEV; |
525 | ||
93872ba2 | 526 | port = kzalloc(sizeof(struct uart_port), GFP_KERNEL); |
02fd473b DM |
527 | if (unlikely(!port)) |
528 | return -ENOMEM; | |
529 | ||
c7754d46 DM |
530 | minor = 1; |
531 | if (sun4v_hvapi_register(HV_GRP_CORE, 1, &minor) == 0 && | |
532 | minor >= 1) { | |
533 | err = -ENOMEM; | |
534 | con_write_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
535 | if (!con_write_page) | |
536 | goto out_free_port; | |
537 | ||
538 | con_read_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
539 | if (!con_read_page) | |
540 | goto out_free_con_write_page; | |
541 | ||
542 | sunhv_console.write = sunhv_console_write_paged; | |
543 | sunhv_ops = &bywrite_ops; | |
544 | } | |
545 | ||
93872ba2 | 546 | sunhv_port = port; |
db33f9bc | 547 | |
02fd473b DM |
548 | port->line = 0; |
549 | port->ops = &sunhv_pops; | |
550 | port->type = PORT_SUNHV; | |
551 | port->uartclk = ( 29491200 / 16 ); /* arbitrary */ | |
552 | ||
db33f9bc DM |
553 | port->membase = (unsigned char __iomem *) __pa(port); |
554 | ||
1636f8ac | 555 | port->irq = op->archdata.irqs[0]; |
93872ba2 DM |
556 | |
557 | port->dev = &op->dev; | |
02fd473b | 558 | |
58d784a5 | 559 | err = sunserial_register_minors(&sunhv_reg, 1); |
93872ba2 | 560 | if (err) |
c7754d46 | 561 | goto out_free_con_read_page; |
02fd473b | 562 | |
61c7a080 | 563 | sunserial_console_match(&sunhv_console, op->dev.of_node, |
457931de | 564 | &sunhv_reg, port->line, false); |
d5a2aa24 | 565 | |
93872ba2 DM |
566 | err = uart_add_one_port(&sunhv_reg, port); |
567 | if (err) | |
568 | goto out_unregister_driver; | |
02fd473b | 569 | |
93872ba2 DM |
570 | err = request_irq(port->irq, sunhv_interrupt, 0, "hvcons", port); |
571 | if (err) | |
572 | goto out_remove_port; | |
db33f9bc | 573 | |
696faedd | 574 | platform_set_drvdata(op, port); |
02fd473b DM |
575 | |
576 | return 0; | |
93872ba2 DM |
577 | |
578 | out_remove_port: | |
579 | uart_remove_one_port(&sunhv_reg, port); | |
580 | ||
581 | out_unregister_driver: | |
58d784a5 | 582 | sunserial_unregister_minors(&sunhv_reg, 1); |
93872ba2 | 583 | |
c7754d46 DM |
584 | out_free_con_read_page: |
585 | kfree(con_read_page); | |
586 | ||
587 | out_free_con_write_page: | |
588 | kfree(con_write_page); | |
589 | ||
93872ba2 DM |
590 | out_free_port: |
591 | kfree(port); | |
592 | sunhv_port = NULL; | |
593 | return err; | |
02fd473b DM |
594 | } |
595 | ||
ae8d8a14 | 596 | static int hv_remove(struct platform_device *dev) |
02fd473b | 597 | { |
696faedd | 598 | struct uart_port *port = platform_get_drvdata(dev); |
02fd473b | 599 | |
db33f9bc DM |
600 | free_irq(port->irq, port); |
601 | ||
02fd473b | 602 | uart_remove_one_port(&sunhv_reg, port); |
02fd473b | 603 | |
58d784a5 | 604 | sunserial_unregister_minors(&sunhv_reg, 1); |
02fd473b | 605 | |
93872ba2 | 606 | kfree(port); |
02fd473b | 607 | sunhv_port = NULL; |
93872ba2 | 608 | |
93872ba2 DM |
609 | return 0; |
610 | } | |
611 | ||
fd098316 | 612 | static const struct of_device_id hv_match[] = { |
93872ba2 DM |
613 | { |
614 | .name = "console", | |
615 | .compatible = "qcn", | |
616 | }, | |
7a05b591 DM |
617 | { |
618 | .name = "console", | |
619 | .compatible = "SUNW,sun4v-console", | |
620 | }, | |
93872ba2 DM |
621 | {}, |
622 | }; | |
93872ba2 | 623 | |
793218df | 624 | static struct platform_driver hv_driver = { |
4018294b GL |
625 | .driver = { |
626 | .name = "hv", | |
4018294b GL |
627 | .of_match_table = hv_match, |
628 | }, | |
93872ba2 | 629 | .probe = hv_probe, |
2d47b716 | 630 | .remove = hv_remove, |
93872ba2 DM |
631 | }; |
632 | ||
633 | static int __init sunhv_init(void) | |
634 | { | |
635 | if (tlb_type != hypervisor) | |
636 | return -ENODEV; | |
637 | ||
793218df | 638 | return platform_driver_register(&hv_driver); |
93872ba2 | 639 | } |
4fef5351 | 640 | device_initcall(sunhv_init); |
93872ba2 | 641 | |
4fef5351 | 642 | #if 0 /* ...def MODULE ; never supported as such */ |
02fd473b | 643 | MODULE_AUTHOR("David S. Miller"); |
93872ba2 DM |
644 | MODULE_DESCRIPTION("SUN4V Hypervisor console driver"); |
645 | MODULE_VERSION("2.0"); | |
02fd473b | 646 | MODULE_LICENSE("GPL"); |
4fef5351 | 647 | #endif |