Commit | Line | Data |
---|---|---|
e3b3d0f5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
02fd473b DM |
2 | /* sunhv.c: Serial driver for SUN4V hypervisor console. |
3 | * | |
c7754d46 | 4 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
02fd473b DM |
5 | */ |
6 | ||
02fd473b DM |
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> | |
c6ed413d | 20 | #include <linux/of_device.h> |
02fd473b DM |
21 | |
22 | #include <asm/hypervisor.h> | |
23 | #include <asm/spitfire.h> | |
93872ba2 | 24 | #include <asm/prom.h> |
f4266ab4 | 25 | #include <asm/irq.h> |
d550bbd4 | 26 | #include <asm/setup.h> |
02fd473b DM |
27 | |
28 | #if defined(CONFIG_MAGIC_SYSRQ) | |
29 | #define SUPPORT_SYSRQ | |
30 | #endif | |
31 | ||
32 | #include <linux/serial_core.h> | |
6816383a | 33 | #include <linux/sunserialcore.h> |
02fd473b DM |
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 | |
05c7cd39 | 75 | static int receive_chars_getchar(struct uart_port *port) |
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 | ||
92a19f9c | 102 | if (port->state == 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 | ||
92a19f9c | 112 | tty_insert_flip_char(&port->state->port, c, TTY_NORMAL); |
c7754d46 DM |
113 | } |
114 | ||
115 | return saw_console_brk; | |
116 | } | |
117 | ||
05c7cd39 | 118 | static int receive_chars_read(struct uart_port *port) |
c7754d46 | 119 | { |
7db60d05 | 120 | static int saw_console_brk; |
c7754d46 DM |
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) { | |
7db60d05 VK |
132 | if (saw_console_brk) |
133 | sun_do_break(); | |
134 | ||
c7754d46 DM |
135 | if (uart_handle_break(port)) |
136 | continue; | |
137 | saw_console_brk = 1; | |
138 | *con_read_page = 0; | |
139 | bytes_read = 1; | |
140 | } else if (stat == CON_HUP) { | |
141 | hung_up = 1; | |
142 | uart_handle_dcd_change(port, 0); | |
143 | continue; | |
144 | } else { | |
145 | /* HV_EWOULDBLOCK, etc. */ | |
146 | break; | |
147 | } | |
148 | } | |
149 | ||
150 | if (hung_up) { | |
151 | hung_up = 0; | |
152 | uart_handle_dcd_change(port, 1); | |
153 | } | |
154 | ||
079317a6 VK |
155 | if (port->sysrq != 0 && *con_read_page) { |
156 | for (i = 0; i < bytes_read; i++) | |
157 | uart_handle_sysrq_char(port, con_read_page[i]); | |
7db60d05 | 158 | saw_console_brk = 0; |
079317a6 | 159 | } |
c7754d46 | 160 | |
05c7cd39 | 161 | if (port->state == NULL) |
02fd473b DM |
162 | continue; |
163 | ||
c7754d46 DM |
164 | port->icount.rx += bytes_read; |
165 | ||
05c7cd39 JS |
166 | tty_insert_flip_string(&port->state->port, con_read_page, |
167 | bytes_read); | |
02fd473b DM |
168 | } |
169 | ||
c7754d46 DM |
170 | return saw_console_brk; |
171 | } | |
172 | ||
173 | struct sunhv_ops { | |
174 | void (*transmit_chars)(struct uart_port *port, struct circ_buf *xmit); | |
05c7cd39 | 175 | int (*receive_chars)(struct uart_port *port); |
c7754d46 DM |
176 | }; |
177 | ||
01fd3c27 | 178 | static const struct sunhv_ops bychar_ops = { |
c7754d46 DM |
179 | .transmit_chars = transmit_chars_putchar, |
180 | .receive_chars = receive_chars_getchar, | |
181 | }; | |
182 | ||
01fd3c27 | 183 | static const struct sunhv_ops bywrite_ops = { |
c7754d46 DM |
184 | .transmit_chars = transmit_chars_write, |
185 | .receive_chars = receive_chars_read, | |
186 | }; | |
187 | ||
01fd3c27 | 188 | static const struct sunhv_ops *sunhv_ops = &bychar_ops; |
c7754d46 | 189 | |
2e124b4a | 190 | static struct tty_port *receive_chars(struct uart_port *port) |
c7754d46 | 191 | { |
2e124b4a | 192 | struct tty_port *tport = NULL; |
c7754d46 | 193 | |
ebd2c8f6 | 194 | if (port->state != NULL) /* Unopened serial console */ |
2e124b4a | 195 | tport = &port->state->port; |
c7754d46 | 196 | |
05c7cd39 | 197 | if (sunhv_ops->receive_chars(port)) |
02fd473b DM |
198 | sun_do_break(); |
199 | ||
2e124b4a | 200 | return tport; |
02fd473b DM |
201 | } |
202 | ||
203 | static void transmit_chars(struct uart_port *port) | |
204 | { | |
db33f9bc DM |
205 | struct circ_buf *xmit; |
206 | ||
ebd2c8f6 | 207 | if (!port->state) |
db33f9bc | 208 | return; |
02fd473b | 209 | |
ebd2c8f6 | 210 | xmit = &port->state->xmit; |
02fd473b DM |
211 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) |
212 | return; | |
213 | ||
c7754d46 | 214 | sunhv_ops->transmit_chars(port, xmit); |
02fd473b DM |
215 | |
216 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
217 | uart_write_wakeup(port); | |
218 | } | |
219 | ||
7d12e780 | 220 | static irqreturn_t sunhv_interrupt(int irq, void *dev_id) |
02fd473b DM |
221 | { |
222 | struct uart_port *port = dev_id; | |
2e124b4a | 223 | struct tty_port *tport; |
02fd473b DM |
224 | unsigned long flags; |
225 | ||
226 | spin_lock_irqsave(&port->lock, flags); | |
2e124b4a | 227 | tport = receive_chars(port); |
02fd473b DM |
228 | transmit_chars(port); |
229 | spin_unlock_irqrestore(&port->lock, flags); | |
230 | ||
2e124b4a JS |
231 | if (tport) |
232 | tty_flip_buffer_push(tport); | |
02fd473b DM |
233 | |
234 | return IRQ_HANDLED; | |
235 | } | |
236 | ||
237 | /* port->lock is not held. */ | |
238 | static unsigned int sunhv_tx_empty(struct uart_port *port) | |
239 | { | |
240 | /* Transmitter is always empty for us. If the circ buffer | |
241 | * is non-empty or there is an x_char pending, our caller | |
242 | * will do the right thing and ignore what we return here. | |
243 | */ | |
244 | return TIOCSER_TEMT; | |
245 | } | |
246 | ||
247 | /* port->lock held by caller. */ | |
248 | static void sunhv_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
249 | { | |
250 | return; | |
251 | } | |
252 | ||
253 | /* port->lock is held by caller and interrupts are disabled. */ | |
254 | static unsigned int sunhv_get_mctrl(struct uart_port *port) | |
255 | { | |
256 | return TIOCM_DSR | TIOCM_CAR | TIOCM_CTS; | |
257 | } | |
258 | ||
259 | /* port->lock held by caller. */ | |
260 | static void sunhv_stop_tx(struct uart_port *port) | |
261 | { | |
262 | return; | |
263 | } | |
264 | ||
265 | /* port->lock held by caller. */ | |
266 | static void sunhv_start_tx(struct uart_port *port) | |
267 | { | |
f798634d | 268 | transmit_chars(port); |
02fd473b DM |
269 | } |
270 | ||
271 | /* port->lock is not held. */ | |
272 | static void sunhv_send_xchar(struct uart_port *port, char ch) | |
273 | { | |
274 | unsigned long flags; | |
275 | int limit = 10000; | |
276 | ||
db106df3 PH |
277 | if (ch == __DISABLED_CHAR) |
278 | return; | |
279 | ||
02fd473b DM |
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 | ||
02fd473b DM |
297 | /* port->lock is not held. */ |
298 | static void sunhv_break_ctl(struct uart_port *port, int break_state) | |
299 | { | |
300 | if (break_state) { | |
301 | unsigned long flags; | |
c7754d46 | 302 | int limit = 10000; |
02fd473b DM |
303 | |
304 | spin_lock_irqsave(&port->lock, flags); | |
305 | ||
306 | while (limit-- > 0) { | |
c7754d46 | 307 | long status = sun4v_con_putchar(CON_BREAK); |
02fd473b DM |
308 | if (status == HV_EOK) |
309 | break; | |
c7754d46 | 310 | udelay(1); |
02fd473b DM |
311 | } |
312 | ||
313 | spin_unlock_irqrestore(&port->lock, flags); | |
314 | } | |
315 | } | |
316 | ||
317 | /* port->lock is not held. */ | |
318 | static int sunhv_startup(struct uart_port *port) | |
319 | { | |
320 | return 0; | |
321 | } | |
322 | ||
323 | /* port->lock is not held. */ | |
324 | static void sunhv_shutdown(struct uart_port *port) | |
325 | { | |
326 | } | |
327 | ||
328 | /* port->lock is not held. */ | |
606d099c AC |
329 | static void sunhv_set_termios(struct uart_port *port, struct ktermios *termios, |
330 | struct ktermios *old) | |
02fd473b DM |
331 | { |
332 | unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); | |
333 | unsigned int quot = uart_get_divisor(port, baud); | |
334 | unsigned int iflag, cflag; | |
335 | unsigned long flags; | |
336 | ||
337 | spin_lock_irqsave(&port->lock, flags); | |
338 | ||
339 | iflag = termios->c_iflag; | |
340 | cflag = termios->c_cflag; | |
341 | ||
342 | port->ignore_status_mask = 0; | |
343 | if (iflag & IGNBRK) | |
344 | port->ignore_status_mask |= IGNORE_BREAK; | |
345 | if ((cflag & CREAD) == 0) | |
346 | port->ignore_status_mask |= IGNORE_ALL; | |
347 | ||
348 | /* XXX */ | |
349 | uart_update_timeout(port, cflag, | |
350 | (port->uartclk / (16 * quot))); | |
351 | ||
352 | spin_unlock_irqrestore(&port->lock, flags); | |
353 | } | |
354 | ||
355 | static const char *sunhv_type(struct uart_port *port) | |
356 | { | |
357 | return "SUN4V HCONS"; | |
358 | } | |
359 | ||
360 | static void sunhv_release_port(struct uart_port *port) | |
361 | { | |
362 | } | |
363 | ||
364 | static int sunhv_request_port(struct uart_port *port) | |
365 | { | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static void sunhv_config_port(struct uart_port *port, int flags) | |
370 | { | |
371 | } | |
372 | ||
373 | static int sunhv_verify_port(struct uart_port *port, struct serial_struct *ser) | |
374 | { | |
375 | return -EINVAL; | |
376 | } | |
377 | ||
2331e068 | 378 | static const struct uart_ops sunhv_pops = { |
02fd473b DM |
379 | .tx_empty = sunhv_tx_empty, |
380 | .set_mctrl = sunhv_set_mctrl, | |
381 | .get_mctrl = sunhv_get_mctrl, | |
382 | .stop_tx = sunhv_stop_tx, | |
383 | .start_tx = sunhv_start_tx, | |
384 | .send_xchar = sunhv_send_xchar, | |
385 | .stop_rx = sunhv_stop_rx, | |
02fd473b DM |
386 | .break_ctl = sunhv_break_ctl, |
387 | .startup = sunhv_startup, | |
388 | .shutdown = sunhv_shutdown, | |
389 | .set_termios = sunhv_set_termios, | |
390 | .type = sunhv_type, | |
391 | .release_port = sunhv_release_port, | |
392 | .request_port = sunhv_request_port, | |
393 | .config_port = sunhv_config_port, | |
394 | .verify_port = sunhv_verify_port, | |
395 | }; | |
396 | ||
397 | static struct uart_driver sunhv_reg = { | |
398 | .owner = THIS_MODULE, | |
32039f49 | 399 | .driver_name = "sunhv", |
02fd473b DM |
400 | .dev_name = "ttyS", |
401 | .major = TTY_MAJOR, | |
402 | }; | |
403 | ||
404 | static struct uart_port *sunhv_port; | |
405 | ||
7dd4fcf5 VK |
406 | void sunhv_migrate_hvcons_irq(int cpu) |
407 | { | |
408 | /* Migrate hvcons irq to param cpu */ | |
409 | irq_force_affinity(sunhv_port->irq, cpumask_of(cpu)); | |
410 | } | |
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 | ||
e58e241c DM |
445 | if (port->sysrq || oops_in_progress) |
446 | locked = spin_trylock_irqsave(&port->lock, flags); | |
447 | else | |
448 | spin_lock_irqsave(&port->lock, flags); | |
02fd473b | 449 | |
c7754d46 DM |
450 | while (n > 0) { |
451 | unsigned long ra = __pa(con_write_page); | |
452 | unsigned long page_bytes; | |
453 | unsigned int cpy = fill_con_write_page(s, n, | |
454 | &page_bytes); | |
455 | ||
456 | n -= cpy; | |
457 | s += cpy; | |
458 | while (page_bytes > 0) { | |
459 | unsigned long written; | |
460 | int limit = 1000000; | |
461 | ||
462 | while (limit--) { | |
463 | unsigned long stat; | |
464 | ||
465 | stat = sun4v_con_write(ra, page_bytes, | |
466 | &written); | |
467 | if (stat == HV_EOK) | |
468 | break; | |
469 | udelay(1); | |
470 | } | |
52e3632e | 471 | if (limit < 0) |
c7754d46 DM |
472 | break; |
473 | page_bytes -= written; | |
474 | ra += written; | |
475 | } | |
476 | } | |
f3c681c0 DM |
477 | |
478 | if (locked) | |
e58e241c | 479 | spin_unlock_irqrestore(&port->lock, flags); |
c7754d46 DM |
480 | } |
481 | ||
482 | static inline void sunhv_console_putchar(struct uart_port *port, char c) | |
483 | { | |
484 | int limit = 1000000; | |
02fd473b DM |
485 | |
486 | while (limit-- > 0) { | |
c7754d46 | 487 | long status = sun4v_con_putchar(c); |
02fd473b DM |
488 | if (status == HV_EOK) |
489 | break; | |
c7754d46 | 490 | udelay(1); |
02fd473b | 491 | } |
02fd473b DM |
492 | } |
493 | ||
c7754d46 | 494 | static void sunhv_console_write_bychar(struct console *con, const char *s, unsigned n) |
02fd473b DM |
495 | { |
496 | struct uart_port *port = sunhv_port; | |
c7754d46 | 497 | unsigned long flags; |
f3c681c0 DM |
498 | int i, locked = 1; |
499 | ||
e58e241c DM |
500 | if (port->sysrq || oops_in_progress) |
501 | locked = spin_trylock_irqsave(&port->lock, flags); | |
502 | else | |
503 | spin_lock_irqsave(&port->lock, flags); | |
02fd473b DM |
504 | |
505 | for (i = 0; i < n; i++) { | |
506 | if (*s == '\n') | |
507 | sunhv_console_putchar(port, '\r'); | |
508 | sunhv_console_putchar(port, *s++); | |
509 | } | |
f3c681c0 DM |
510 | |
511 | if (locked) | |
e58e241c | 512 | spin_unlock_irqrestore(&port->lock, flags); |
02fd473b DM |
513 | } |
514 | ||
02fd473b | 515 | static struct console sunhv_console = { |
d5a2aa24 | 516 | .name = "ttyHV", |
c7754d46 | 517 | .write = sunhv_console_write_bychar, |
02fd473b | 518 | .device = uart_console_device, |
02fd473b DM |
519 | .flags = CON_PRINTBUFFER, |
520 | .index = -1, | |
521 | .data = &sunhv_reg, | |
522 | }; | |
523 | ||
9671f099 | 524 | static int hv_probe(struct platform_device *op) |
02fd473b DM |
525 | { |
526 | struct uart_port *port; | |
c7754d46 | 527 | unsigned long minor; |
93872ba2 | 528 | int err; |
02fd473b | 529 | |
1636f8ac | 530 | if (op->archdata.irqs[0] == 0xffffffff) |
02fd473b DM |
531 | return -ENODEV; |
532 | ||
93872ba2 | 533 | port = kzalloc(sizeof(struct uart_port), GFP_KERNEL); |
02fd473b DM |
534 | if (unlikely(!port)) |
535 | return -ENOMEM; | |
536 | ||
c7754d46 DM |
537 | minor = 1; |
538 | if (sun4v_hvapi_register(HV_GRP_CORE, 1, &minor) == 0 && | |
539 | minor >= 1) { | |
540 | err = -ENOMEM; | |
541 | con_write_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
542 | if (!con_write_page) | |
543 | goto out_free_port; | |
544 | ||
545 | con_read_page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
546 | if (!con_read_page) | |
547 | goto out_free_con_write_page; | |
548 | ||
549 | sunhv_console.write = sunhv_console_write_paged; | |
550 | sunhv_ops = &bywrite_ops; | |
551 | } | |
552 | ||
93872ba2 | 553 | sunhv_port = port; |
db33f9bc | 554 | |
02fd473b DM |
555 | port->line = 0; |
556 | port->ops = &sunhv_pops; | |
557 | port->type = PORT_SUNHV; | |
558 | port->uartclk = ( 29491200 / 16 ); /* arbitrary */ | |
559 | ||
db33f9bc DM |
560 | port->membase = (unsigned char __iomem *) __pa(port); |
561 | ||
1636f8ac | 562 | port->irq = op->archdata.irqs[0]; |
93872ba2 DM |
563 | |
564 | port->dev = &op->dev; | |
02fd473b | 565 | |
58d784a5 | 566 | err = sunserial_register_minors(&sunhv_reg, 1); |
93872ba2 | 567 | if (err) |
c7754d46 | 568 | goto out_free_con_read_page; |
02fd473b | 569 | |
61c7a080 | 570 | sunserial_console_match(&sunhv_console, op->dev.of_node, |
457931de | 571 | &sunhv_reg, port->line, false); |
d5a2aa24 | 572 | |
93872ba2 DM |
573 | err = uart_add_one_port(&sunhv_reg, port); |
574 | if (err) | |
575 | goto out_unregister_driver; | |
02fd473b | 576 | |
93872ba2 DM |
577 | err = request_irq(port->irq, sunhv_interrupt, 0, "hvcons", port); |
578 | if (err) | |
579 | goto out_remove_port; | |
db33f9bc | 580 | |
696faedd | 581 | platform_set_drvdata(op, port); |
02fd473b DM |
582 | |
583 | return 0; | |
93872ba2 DM |
584 | |
585 | out_remove_port: | |
586 | uart_remove_one_port(&sunhv_reg, port); | |
587 | ||
588 | out_unregister_driver: | |
58d784a5 | 589 | sunserial_unregister_minors(&sunhv_reg, 1); |
93872ba2 | 590 | |
c7754d46 DM |
591 | out_free_con_read_page: |
592 | kfree(con_read_page); | |
593 | ||
594 | out_free_con_write_page: | |
595 | kfree(con_write_page); | |
596 | ||
93872ba2 DM |
597 | out_free_port: |
598 | kfree(port); | |
599 | sunhv_port = NULL; | |
600 | return err; | |
02fd473b DM |
601 | } |
602 | ||
ae8d8a14 | 603 | static int hv_remove(struct platform_device *dev) |
02fd473b | 604 | { |
696faedd | 605 | struct uart_port *port = platform_get_drvdata(dev); |
02fd473b | 606 | |
db33f9bc DM |
607 | free_irq(port->irq, port); |
608 | ||
02fd473b | 609 | uart_remove_one_port(&sunhv_reg, port); |
02fd473b | 610 | |
58d784a5 | 611 | sunserial_unregister_minors(&sunhv_reg, 1); |
fbb7d2e3 SJ |
612 | kfree(con_read_page); |
613 | kfree(con_write_page); | |
93872ba2 | 614 | kfree(port); |
02fd473b | 615 | sunhv_port = NULL; |
93872ba2 | 616 | |
93872ba2 DM |
617 | return 0; |
618 | } | |
619 | ||
fd098316 | 620 | static const struct of_device_id hv_match[] = { |
93872ba2 DM |
621 | { |
622 | .name = "console", | |
623 | .compatible = "qcn", | |
624 | }, | |
7a05b591 DM |
625 | { |
626 | .name = "console", | |
627 | .compatible = "SUNW,sun4v-console", | |
628 | }, | |
93872ba2 DM |
629 | {}, |
630 | }; | |
93872ba2 | 631 | |
793218df | 632 | static struct platform_driver hv_driver = { |
4018294b GL |
633 | .driver = { |
634 | .name = "hv", | |
4018294b GL |
635 | .of_match_table = hv_match, |
636 | }, | |
93872ba2 | 637 | .probe = hv_probe, |
2d47b716 | 638 | .remove = hv_remove, |
93872ba2 DM |
639 | }; |
640 | ||
641 | static int __init sunhv_init(void) | |
642 | { | |
643 | if (tlb_type != hypervisor) | |
644 | return -ENODEV; | |
645 | ||
793218df | 646 | return platform_driver_register(&hv_driver); |
93872ba2 | 647 | } |
4fef5351 | 648 | device_initcall(sunhv_init); |
93872ba2 | 649 | |
4fef5351 | 650 | #if 0 /* ...def MODULE ; never supported as such */ |
02fd473b | 651 | MODULE_AUTHOR("David S. Miller"); |
93872ba2 DM |
652 | MODULE_DESCRIPTION("SUN4V Hypervisor console driver"); |
653 | MODULE_VERSION("2.0"); | |
02fd473b | 654 | MODULE_LICENSE("GPL"); |
4fef5351 | 655 | #endif |