Commit | Line | Data |
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74e95d5d GL |
1 | /* |
2 | * PS3 virtual uart | |
3 | * | |
4 | * Copyright (C) 2006 Sony Computer Entertainment Inc. | |
5 | * Copyright 2006 Sony Corp. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; version 2 of the License. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <asm/ps3.h> | |
25 | ||
75c86e74 | 26 | #include <asm/firmware.h> |
74e95d5d GL |
27 | #include <asm/lv1call.h> |
28 | #include <asm/bitops.h> | |
29 | ||
30 | #include "vuart.h" | |
31 | ||
32 | MODULE_AUTHOR("Sony Corporation"); | |
33 | MODULE_LICENSE("GPL v2"); | |
75c86e74 | 34 | MODULE_DESCRIPTION("PS3 vuart"); |
74e95d5d GL |
35 | |
36 | /** | |
37 | * vuart - An inter-partition data link service. | |
38 | * port 0: PS3 AV Settings. | |
39 | * port 2: PS3 System Manager. | |
40 | * | |
41 | * The vuart provides a bi-directional byte stream data link between logical | |
42 | * partitions. Its primary role is as a communications link between the guest | |
43 | * OS and the system policy module. The current HV does not support any | |
44 | * connections other than those listed. | |
45 | */ | |
46 | ||
47 | enum {PORT_COUNT = 3,}; | |
48 | ||
49 | enum vuart_param { | |
50 | PARAM_TX_TRIGGER = 0, | |
51 | PARAM_RX_TRIGGER = 1, | |
52 | PARAM_INTERRUPT_MASK = 2, | |
53 | PARAM_RX_BUF_SIZE = 3, /* read only */ | |
54 | PARAM_RX_BYTES = 4, /* read only */ | |
55 | PARAM_TX_BUF_SIZE = 5, /* read only */ | |
56 | PARAM_TX_BYTES = 6, /* read only */ | |
57 | PARAM_INTERRUPT_STATUS = 7, /* read only */ | |
58 | }; | |
59 | ||
60 | enum vuart_interrupt_bit { | |
61 | INTERRUPT_BIT_TX = 0, | |
62 | INTERRUPT_BIT_RX = 1, | |
63 | INTERRUPT_BIT_DISCONNECT = 2, | |
64 | }; | |
65 | ||
66 | enum vuart_interrupt_mask { | |
67 | INTERRUPT_MASK_TX = 1, | |
68 | INTERRUPT_MASK_RX = 2, | |
69 | INTERRUPT_MASK_DISCONNECT = 4, | |
70 | }; | |
71 | ||
72 | /** | |
73 | * struct ports_bmp - bitmap indicating ports needing service. | |
74 | * | |
75 | * A 256 bit read only bitmap indicating ports needing service. Do not write | |
76 | * to these bits. Must not cross a page boundary. | |
77 | */ | |
78 | ||
79 | struct ports_bmp { | |
80 | u64 status; | |
81 | u64 unused[3]; | |
82 | } __attribute__ ((aligned (32))); | |
83 | ||
84 | /* redefine dev_dbg to do a syntax check */ | |
85 | ||
86 | #if !defined(DEBUG) | |
87 | #undef dev_dbg | |
88 | static inline int __attribute__ ((format (printf, 2, 3))) dev_dbg( | |
89 | const struct device *_dev, const char *fmt, ...) {return 0;} | |
90 | #endif | |
91 | ||
92 | #define dump_ports_bmp(_b) _dump_ports_bmp(_b, __func__, __LINE__) | |
93 | static void __attribute__ ((unused)) _dump_ports_bmp( | |
94 | const struct ports_bmp* bmp, const char* func, int line) | |
95 | { | |
96 | pr_debug("%s:%d: ports_bmp: %016lxh\n", func, line, bmp->status); | |
97 | } | |
98 | ||
99 | static int ps3_vuart_match_id_to_port(enum ps3_match_id match_id, | |
100 | unsigned int *port_number) | |
101 | { | |
102 | switch(match_id) { | |
103 | case PS3_MATCH_ID_AV_SETTINGS: | |
104 | *port_number = 0; | |
105 | return 0; | |
106 | case PS3_MATCH_ID_SYSTEM_MANAGER: | |
107 | *port_number = 2; | |
108 | return 0; | |
109 | default: | |
110 | WARN_ON(1); | |
111 | *port_number = UINT_MAX; | |
112 | return -EINVAL; | |
113 | }; | |
114 | } | |
115 | ||
116 | #define dump_port_params(_b) _dump_port_params(_b, __func__, __LINE__) | |
117 | static void __attribute__ ((unused)) _dump_port_params(unsigned int port_number, | |
118 | const char* func, int line) | |
119 | { | |
120 | #if defined(DEBUG) | |
121 | static const char *strings[] = { | |
122 | "tx_trigger ", | |
123 | "rx_trigger ", | |
124 | "interrupt_mask ", | |
125 | "rx_buf_size ", | |
126 | "rx_bytes ", | |
127 | "tx_buf_size ", | |
128 | "tx_bytes ", | |
129 | "interrupt_status", | |
130 | }; | |
131 | int result; | |
132 | unsigned int i; | |
133 | u64 value; | |
134 | ||
135 | for (i = 0; i < ARRAY_SIZE(strings); i++) { | |
136 | result = lv1_get_virtual_uart_param(port_number, i, &value); | |
137 | ||
138 | if (result) { | |
139 | pr_debug("%s:%d: port_%u: %s failed: %s\n", func, line, | |
140 | port_number, strings[i], ps3_result(result)); | |
141 | continue; | |
142 | } | |
143 | pr_debug("%s:%d: port_%u: %s = %lxh\n", | |
144 | func, line, port_number, strings[i], value); | |
145 | } | |
146 | #endif | |
147 | } | |
148 | ||
149 | struct vuart_triggers { | |
150 | unsigned long rx; | |
151 | unsigned long tx; | |
152 | }; | |
153 | ||
154 | int ps3_vuart_get_triggers(struct ps3_vuart_port_device *dev, | |
155 | struct vuart_triggers *trig) | |
156 | { | |
157 | int result; | |
158 | unsigned long size; | |
159 | unsigned long val; | |
160 | ||
75c86e74 | 161 | result = lv1_get_virtual_uart_param(dev->priv->port_number, |
74e95d5d GL |
162 | PARAM_TX_TRIGGER, &trig->tx); |
163 | ||
164 | if (result) { | |
165 | dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n", | |
166 | __func__, __LINE__, ps3_result(result)); | |
167 | return result; | |
168 | } | |
169 | ||
75c86e74 | 170 | result = lv1_get_virtual_uart_param(dev->priv->port_number, |
74e95d5d GL |
171 | PARAM_RX_BUF_SIZE, &size); |
172 | ||
173 | if (result) { | |
174 | dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n", | |
175 | __func__, __LINE__, ps3_result(result)); | |
176 | return result; | |
177 | } | |
178 | ||
75c86e74 | 179 | result = lv1_get_virtual_uart_param(dev->priv->port_number, |
74e95d5d GL |
180 | PARAM_RX_TRIGGER, &val); |
181 | ||
182 | if (result) { | |
183 | dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n", | |
184 | __func__, __LINE__, ps3_result(result)); | |
185 | return result; | |
186 | } | |
187 | ||
188 | trig->rx = size - val; | |
189 | ||
190 | dev_dbg(&dev->core, "%s:%d: tx %lxh, rx %lxh\n", __func__, __LINE__, | |
191 | trig->tx, trig->rx); | |
192 | ||
193 | return result; | |
194 | } | |
195 | ||
196 | int ps3_vuart_set_triggers(struct ps3_vuart_port_device *dev, unsigned int tx, | |
197 | unsigned int rx) | |
198 | { | |
199 | int result; | |
200 | unsigned long size; | |
201 | ||
75c86e74 | 202 | result = lv1_set_virtual_uart_param(dev->priv->port_number, |
74e95d5d GL |
203 | PARAM_TX_TRIGGER, tx); |
204 | ||
205 | if (result) { | |
206 | dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n", | |
207 | __func__, __LINE__, ps3_result(result)); | |
208 | return result; | |
209 | } | |
210 | ||
75c86e74 | 211 | result = lv1_get_virtual_uart_param(dev->priv->port_number, |
74e95d5d GL |
212 | PARAM_RX_BUF_SIZE, &size); |
213 | ||
214 | if (result) { | |
215 | dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n", | |
216 | __func__, __LINE__, ps3_result(result)); | |
217 | return result; | |
218 | } | |
219 | ||
75c86e74 | 220 | result = lv1_set_virtual_uart_param(dev->priv->port_number, |
74e95d5d GL |
221 | PARAM_RX_TRIGGER, size - rx); |
222 | ||
223 | if (result) { | |
224 | dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n", | |
225 | __func__, __LINE__, ps3_result(result)); | |
226 | return result; | |
227 | } | |
228 | ||
229 | dev_dbg(&dev->core, "%s:%d: tx %xh, rx %xh\n", __func__, __LINE__, | |
230 | tx, rx); | |
231 | ||
232 | return result; | |
233 | } | |
234 | ||
235 | static int ps3_vuart_get_rx_bytes_waiting(struct ps3_vuart_port_device *dev, | |
75c86e74 | 236 | u64 *bytes_waiting) |
74e95d5d | 237 | { |
75c86e74 | 238 | int result = lv1_get_virtual_uart_param(dev->priv->port_number, |
74e95d5d GL |
239 | PARAM_RX_BYTES, bytes_waiting); |
240 | ||
241 | if (result) | |
242 | dev_dbg(&dev->core, "%s:%d: rx_bytes failed: %s\n", | |
243 | __func__, __LINE__, ps3_result(result)); | |
244 | ||
245 | dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, | |
246 | *bytes_waiting); | |
247 | return result; | |
248 | } | |
249 | ||
250 | static int ps3_vuart_set_interrupt_mask(struct ps3_vuart_port_device *dev, | |
251 | unsigned long mask) | |
252 | { | |
253 | int result; | |
254 | ||
255 | dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, mask); | |
256 | ||
75c86e74 | 257 | dev->priv->interrupt_mask = mask; |
74e95d5d | 258 | |
75c86e74 GL |
259 | result = lv1_set_virtual_uart_param(dev->priv->port_number, |
260 | PARAM_INTERRUPT_MASK, dev->priv->interrupt_mask); | |
74e95d5d GL |
261 | |
262 | if (result) | |
263 | dev_dbg(&dev->core, "%s:%d: interrupt_mask failed: %s\n", | |
264 | __func__, __LINE__, ps3_result(result)); | |
265 | ||
266 | return result; | |
267 | } | |
268 | ||
75c86e74 | 269 | static int ps3_vuart_get_interrupt_status(struct ps3_vuart_port_device *dev, |
74e95d5d GL |
270 | unsigned long *status) |
271 | { | |
75c86e74 GL |
272 | u64 tmp; |
273 | int result = lv1_get_virtual_uart_param(dev->priv->port_number, | |
274 | PARAM_INTERRUPT_STATUS, &tmp); | |
74e95d5d GL |
275 | |
276 | if (result) | |
277 | dev_dbg(&dev->core, "%s:%d: interrupt_status failed: %s\n", | |
278 | __func__, __LINE__, ps3_result(result)); | |
279 | ||
75c86e74 GL |
280 | *status = tmp & dev->priv->interrupt_mask; |
281 | ||
74e95d5d | 282 | dev_dbg(&dev->core, "%s:%d: m %lxh, s %lxh, m&s %lxh\n", |
75c86e74 | 283 | __func__, __LINE__, dev->priv->interrupt_mask, tmp, *status); |
74e95d5d GL |
284 | |
285 | return result; | |
286 | } | |
287 | ||
288 | int ps3_vuart_enable_interrupt_tx(struct ps3_vuart_port_device *dev) | |
289 | { | |
75c86e74 GL |
290 | return (dev->priv->interrupt_mask & INTERRUPT_MASK_TX) ? 0 |
291 | : ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask | |
74e95d5d GL |
292 | | INTERRUPT_MASK_TX); |
293 | } | |
294 | ||
295 | int ps3_vuart_enable_interrupt_rx(struct ps3_vuart_port_device *dev) | |
296 | { | |
75c86e74 GL |
297 | return (dev->priv->interrupt_mask & INTERRUPT_MASK_RX) ? 0 |
298 | : ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask | |
74e95d5d GL |
299 | | INTERRUPT_MASK_RX); |
300 | } | |
301 | ||
302 | int ps3_vuart_enable_interrupt_disconnect(struct ps3_vuart_port_device *dev) | |
303 | { | |
75c86e74 GL |
304 | return (dev->priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) ? 0 |
305 | : ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask | |
74e95d5d GL |
306 | | INTERRUPT_MASK_DISCONNECT); |
307 | } | |
308 | ||
309 | int ps3_vuart_disable_interrupt_tx(struct ps3_vuart_port_device *dev) | |
310 | { | |
75c86e74 GL |
311 | return (dev->priv->interrupt_mask & INTERRUPT_MASK_TX) |
312 | ? ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask | |
74e95d5d GL |
313 | & ~INTERRUPT_MASK_TX) : 0; |
314 | } | |
315 | ||
316 | int ps3_vuart_disable_interrupt_rx(struct ps3_vuart_port_device *dev) | |
317 | { | |
75c86e74 GL |
318 | return (dev->priv->interrupt_mask & INTERRUPT_MASK_RX) |
319 | ? ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask | |
74e95d5d GL |
320 | & ~INTERRUPT_MASK_RX) : 0; |
321 | } | |
322 | ||
323 | int ps3_vuart_disable_interrupt_disconnect(struct ps3_vuart_port_device *dev) | |
324 | { | |
75c86e74 GL |
325 | return (dev->priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) |
326 | ? ps3_vuart_set_interrupt_mask(dev, dev->priv->interrupt_mask | |
74e95d5d GL |
327 | & ~INTERRUPT_MASK_DISCONNECT) : 0; |
328 | } | |
329 | ||
330 | /** | |
331 | * ps3_vuart_raw_write - Low level write helper. | |
332 | * | |
333 | * Do not call ps3_vuart_raw_write directly, use ps3_vuart_write. | |
334 | */ | |
335 | ||
336 | static int ps3_vuart_raw_write(struct ps3_vuart_port_device *dev, | |
337 | const void* buf, unsigned int bytes, unsigned long *bytes_written) | |
338 | { | |
339 | int result; | |
340 | ||
75c86e74 | 341 | result = lv1_write_virtual_uart(dev->priv->port_number, |
74e95d5d GL |
342 | ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_written); |
343 | ||
344 | if (result) { | |
345 | dev_dbg(&dev->core, "%s:%d: lv1_write_virtual_uart failed: " | |
346 | "%s\n", __func__, __LINE__, ps3_result(result)); | |
347 | return result; | |
348 | } | |
349 | ||
75c86e74 | 350 | dev->priv->stats.bytes_written += *bytes_written; |
74e95d5d | 351 | |
75c86e74 GL |
352 | dev_dbg(&dev->core, "%s:%d: wrote %lxh/%xh=>%lxh\n", __func__, __LINE__, |
353 | *bytes_written, bytes, dev->priv->stats.bytes_written); | |
74e95d5d GL |
354 | |
355 | return result; | |
356 | } | |
357 | ||
358 | /** | |
359 | * ps3_vuart_raw_read - Low level read helper. | |
360 | * | |
361 | * Do not call ps3_vuart_raw_read directly, use ps3_vuart_read. | |
362 | */ | |
363 | ||
364 | static int ps3_vuart_raw_read(struct ps3_vuart_port_device *dev, void* buf, | |
365 | unsigned int bytes, unsigned long *bytes_read) | |
366 | { | |
367 | int result; | |
368 | ||
369 | dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, bytes); | |
370 | ||
75c86e74 | 371 | result = lv1_read_virtual_uart(dev->priv->port_number, |
74e95d5d GL |
372 | ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_read); |
373 | ||
374 | if (result) { | |
375 | dev_dbg(&dev->core, "%s:%d: lv1_read_virtual_uart failed: %s\n", | |
376 | __func__, __LINE__, ps3_result(result)); | |
377 | return result; | |
378 | } | |
379 | ||
75c86e74 | 380 | dev->priv->stats.bytes_read += *bytes_read; |
74e95d5d GL |
381 | |
382 | dev_dbg(&dev->core, "%s:%d: read %lxh/%xh=>%lxh\n", __func__, __LINE__, | |
75c86e74 | 383 | *bytes_read, bytes, dev->priv->stats.bytes_read); |
74e95d5d GL |
384 | |
385 | return result; | |
386 | } | |
387 | ||
75c86e74 GL |
388 | /** |
389 | * ps3_vuart_clear_rx_bytes - Discard bytes received. | |
390 | * @bytes: Max byte count to discard, zero = all pending. | |
391 | * | |
392 | * Used to clear pending rx interrupt source. Will not block. | |
393 | */ | |
394 | ||
395 | void ps3_vuart_clear_rx_bytes(struct ps3_vuart_port_device *dev, | |
396 | unsigned int bytes) | |
397 | { | |
398 | int result; | |
399 | u64 bytes_waiting; | |
400 | void* tmp; | |
401 | ||
402 | result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes_waiting); | |
403 | ||
404 | BUG_ON(result); | |
405 | ||
406 | bytes = bytes ? min(bytes, (unsigned int)bytes_waiting) : bytes_waiting; | |
407 | ||
408 | dev_dbg(&dev->core, "%s:%d: %u\n", __func__, __LINE__, bytes); | |
409 | ||
410 | if (!bytes) | |
411 | return; | |
412 | ||
413 | /* Add some extra space for recently arrived data. */ | |
414 | ||
415 | bytes += 128; | |
416 | ||
417 | tmp = kmalloc(bytes, GFP_KERNEL); | |
418 | ||
419 | if (!tmp) | |
420 | return; | |
421 | ||
422 | ps3_vuart_raw_read(dev, tmp, bytes, &bytes_waiting); | |
423 | ||
424 | kfree(tmp); | |
425 | ||
426 | /* Don't include these bytes in the stats. */ | |
427 | ||
428 | dev->priv->stats.bytes_read -= bytes_waiting; | |
429 | } | |
430 | ||
74e95d5d GL |
431 | /** |
432 | * struct list_buffer - An element for a port device fifo buffer list. | |
433 | */ | |
434 | ||
435 | struct list_buffer { | |
436 | struct list_head link; | |
437 | const unsigned char *head; | |
438 | const unsigned char *tail; | |
439 | unsigned long dbg_number; | |
440 | unsigned char data[]; | |
441 | }; | |
442 | ||
443 | /** | |
444 | * ps3_vuart_write - the entry point for writing data to a port | |
445 | * | |
446 | * If the port is idle on entry as much of the incoming data is written to | |
447 | * the port as the port will accept. Otherwise a list buffer is created | |
448 | * and any remaning incoming data is copied to that buffer. The buffer is | |
449 | * then enqueued for transmision via the transmit interrupt. | |
450 | */ | |
451 | ||
452 | int ps3_vuart_write(struct ps3_vuart_port_device *dev, const void* buf, | |
453 | unsigned int bytes) | |
454 | { | |
455 | static unsigned long dbg_number; | |
456 | int result; | |
457 | unsigned long flags; | |
458 | struct list_buffer *lb; | |
459 | ||
460 | dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__, | |
461 | bytes, bytes); | |
462 | ||
75c86e74 | 463 | spin_lock_irqsave(&dev->priv->tx_list.lock, flags); |
74e95d5d | 464 | |
75c86e74 | 465 | if (list_empty(&dev->priv->tx_list.head)) { |
74e95d5d GL |
466 | unsigned long bytes_written; |
467 | ||
468 | result = ps3_vuart_raw_write(dev, buf, bytes, &bytes_written); | |
469 | ||
75c86e74 | 470 | spin_unlock_irqrestore(&dev->priv->tx_list.lock, flags); |
74e95d5d GL |
471 | |
472 | if (result) { | |
473 | dev_dbg(&dev->core, | |
474 | "%s:%d: ps3_vuart_raw_write failed\n", | |
475 | __func__, __LINE__); | |
476 | return result; | |
477 | } | |
478 | ||
479 | if (bytes_written == bytes) { | |
480 | dev_dbg(&dev->core, "%s:%d: wrote %xh bytes\n", | |
481 | __func__, __LINE__, bytes); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | bytes -= bytes_written; | |
486 | buf += bytes_written; | |
487 | } else | |
75c86e74 | 488 | spin_unlock_irqrestore(&dev->priv->tx_list.lock, flags); |
74e95d5d GL |
489 | |
490 | lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_KERNEL); | |
491 | ||
492 | if (!lb) { | |
493 | return -ENOMEM; | |
494 | } | |
495 | ||
496 | memcpy(lb->data, buf, bytes); | |
497 | lb->head = lb->data; | |
498 | lb->tail = lb->data + bytes; | |
499 | lb->dbg_number = ++dbg_number; | |
500 | ||
75c86e74 GL |
501 | spin_lock_irqsave(&dev->priv->tx_list.lock, flags); |
502 | list_add_tail(&lb->link, &dev->priv->tx_list.head); | |
74e95d5d | 503 | ps3_vuart_enable_interrupt_tx(dev); |
75c86e74 | 504 | spin_unlock_irqrestore(&dev->priv->tx_list.lock, flags); |
74e95d5d GL |
505 | |
506 | dev_dbg(&dev->core, "%s:%d: queued buf_%lu, %xh bytes\n", | |
507 | __func__, __LINE__, lb->dbg_number, bytes); | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | /** | |
513 | * ps3_vuart_read - the entry point for reading data from a port | |
514 | * | |
515 | * If enough bytes to satisfy the request are held in the buffer list those | |
516 | * bytes are dequeued and copied to the caller's buffer. Emptied list buffers | |
517 | * are retiered. If the request cannot be statified by bytes held in the list | |
518 | * buffers -EAGAIN is returned. | |
519 | */ | |
520 | ||
521 | int ps3_vuart_read(struct ps3_vuart_port_device *dev, void* buf, | |
522 | unsigned int bytes) | |
523 | { | |
524 | unsigned long flags; | |
525 | struct list_buffer *lb, *n; | |
526 | unsigned long bytes_read; | |
527 | ||
528 | dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__, | |
529 | bytes, bytes); | |
530 | ||
75c86e74 | 531 | spin_lock_irqsave(&dev->priv->rx_list.lock, flags); |
74e95d5d | 532 | |
75c86e74 GL |
533 | if (dev->priv->rx_list.bytes_held < bytes) { |
534 | spin_unlock_irqrestore(&dev->priv->rx_list.lock, flags); | |
74e95d5d | 535 | dev_dbg(&dev->core, "%s:%d: starved for %lxh bytes\n", |
75c86e74 GL |
536 | __func__, __LINE__, |
537 | bytes - dev->priv->rx_list.bytes_held); | |
74e95d5d GL |
538 | return -EAGAIN; |
539 | } | |
540 | ||
75c86e74 | 541 | list_for_each_entry_safe(lb, n, &dev->priv->rx_list.head, link) { |
74e95d5d GL |
542 | bytes_read = min((unsigned int)(lb->tail - lb->head), bytes); |
543 | ||
544 | memcpy(buf, lb->head, bytes_read); | |
545 | buf += bytes_read; | |
546 | bytes -= bytes_read; | |
75c86e74 | 547 | dev->priv->rx_list.bytes_held -= bytes_read; |
74e95d5d GL |
548 | |
549 | if (bytes_read < lb->tail - lb->head) { | |
550 | lb->head += bytes_read; | |
75c86e74 GL |
551 | dev_dbg(&dev->core, "%s:%d: buf_%lu: dequeued %lxh " |
552 | "bytes\n", __func__, __LINE__, lb->dbg_number, | |
553 | bytes_read); | |
554 | spin_unlock_irqrestore(&dev->priv->rx_list.lock, flags); | |
74e95d5d GL |
555 | return 0; |
556 | } | |
557 | ||
75c86e74 GL |
558 | dev_dbg(&dev->core, "%s:%d: buf_%lu: free, dequeued %lxh " |
559 | "bytes\n", __func__, __LINE__, lb->dbg_number, | |
560 | bytes_read); | |
74e95d5d GL |
561 | |
562 | list_del(&lb->link); | |
563 | kfree(lb); | |
564 | } | |
74e95d5d | 565 | |
75c86e74 | 566 | spin_unlock_irqrestore(&dev->priv->rx_list.lock, flags); |
74e95d5d GL |
567 | return 0; |
568 | } | |
569 | ||
570 | /** | |
571 | * ps3_vuart_handle_interrupt_tx - third stage transmit interrupt handler | |
572 | * | |
573 | * Services the transmit interrupt for the port. Writes as much data from the | |
574 | * buffer list as the port will accept. Retires any emptied list buffers and | |
575 | * adjusts the final list buffer state for a partial write. | |
576 | */ | |
577 | ||
578 | static int ps3_vuart_handle_interrupt_tx(struct ps3_vuart_port_device *dev) | |
579 | { | |
580 | int result = 0; | |
581 | unsigned long flags; | |
582 | struct list_buffer *lb, *n; | |
583 | unsigned long bytes_total = 0; | |
584 | ||
585 | dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); | |
586 | ||
75c86e74 | 587 | spin_lock_irqsave(&dev->priv->tx_list.lock, flags); |
74e95d5d | 588 | |
75c86e74 | 589 | list_for_each_entry_safe(lb, n, &dev->priv->tx_list.head, link) { |
74e95d5d GL |
590 | |
591 | unsigned long bytes_written; | |
592 | ||
593 | result = ps3_vuart_raw_write(dev, lb->head, lb->tail - lb->head, | |
594 | &bytes_written); | |
595 | ||
596 | if (result) { | |
597 | dev_dbg(&dev->core, | |
598 | "%s:%d: ps3_vuart_raw_write failed\n", | |
599 | __func__, __LINE__); | |
600 | break; | |
601 | } | |
602 | ||
603 | bytes_total += bytes_written; | |
604 | ||
605 | if (bytes_written < lb->tail - lb->head) { | |
606 | lb->head += bytes_written; | |
607 | dev_dbg(&dev->core, | |
608 | "%s:%d cleared buf_%lu, %lxh bytes\n", | |
609 | __func__, __LINE__, lb->dbg_number, | |
610 | bytes_written); | |
611 | goto port_full; | |
612 | } | |
613 | ||
614 | dev_dbg(&dev->core, "%s:%d free buf_%lu\n", __func__, __LINE__, | |
615 | lb->dbg_number); | |
616 | ||
617 | list_del(&lb->link); | |
618 | kfree(lb); | |
619 | } | |
620 | ||
621 | ps3_vuart_disable_interrupt_tx(dev); | |
622 | port_full: | |
75c86e74 | 623 | spin_unlock_irqrestore(&dev->priv->tx_list.lock, flags); |
74e95d5d GL |
624 | dev_dbg(&dev->core, "%s:%d wrote %lxh bytes total\n", |
625 | __func__, __LINE__, bytes_total); | |
626 | return result; | |
627 | } | |
628 | ||
629 | /** | |
630 | * ps3_vuart_handle_interrupt_rx - third stage receive interrupt handler | |
631 | * | |
632 | * Services the receive interrupt for the port. Creates a list buffer and | |
633 | * copies all waiting port data to that buffer and enqueues the buffer in the | |
634 | * buffer list. Buffer list data is dequeued via ps3_vuart_read. | |
635 | */ | |
636 | ||
637 | static int ps3_vuart_handle_interrupt_rx(struct ps3_vuart_port_device *dev) | |
638 | { | |
639 | static unsigned long dbg_number; | |
640 | int result = 0; | |
641 | unsigned long flags; | |
642 | struct list_buffer *lb; | |
643 | unsigned long bytes; | |
644 | ||
645 | dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); | |
646 | ||
647 | result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes); | |
648 | ||
649 | if (result) | |
650 | return -EIO; | |
651 | ||
652 | BUG_ON(!bytes); | |
653 | ||
75c86e74 | 654 | /* Add some extra space for recently arrived data. */ |
74e95d5d GL |
655 | |
656 | bytes += 128; | |
657 | ||
658 | lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_ATOMIC); | |
659 | ||
660 | if (!lb) | |
661 | return -ENOMEM; | |
662 | ||
663 | ps3_vuart_raw_read(dev, lb->data, bytes, &bytes); | |
664 | ||
665 | lb->head = lb->data; | |
666 | lb->tail = lb->data + bytes; | |
667 | lb->dbg_number = ++dbg_number; | |
668 | ||
75c86e74 GL |
669 | spin_lock_irqsave(&dev->priv->rx_list.lock, flags); |
670 | list_add_tail(&lb->link, &dev->priv->rx_list.head); | |
671 | dev->priv->rx_list.bytes_held += bytes; | |
672 | spin_unlock_irqrestore(&dev->priv->rx_list.lock, flags); | |
74e95d5d | 673 | |
75c86e74 | 674 | dev_dbg(&dev->core, "%s:%d: buf_%lu: queued %lxh bytes\n", |
74e95d5d GL |
675 | __func__, __LINE__, lb->dbg_number, bytes); |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | static int ps3_vuart_handle_interrupt_disconnect( | |
681 | struct ps3_vuart_port_device *dev) | |
682 | { | |
683 | dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); | |
684 | BUG_ON("no support"); | |
685 | return -1; | |
686 | } | |
687 | ||
688 | /** | |
689 | * ps3_vuart_handle_port_interrupt - second stage interrupt handler | |
690 | * | |
691 | * Services any pending interrupt types for the port. Passes control to the | |
692 | * third stage type specific interrupt handler. Returns control to the first | |
693 | * stage handler after one iteration. | |
694 | */ | |
695 | ||
696 | static int ps3_vuart_handle_port_interrupt(struct ps3_vuart_port_device *dev) | |
697 | { | |
698 | int result; | |
699 | unsigned long status; | |
700 | ||
75c86e74 | 701 | result = ps3_vuart_get_interrupt_status(dev, &status); |
74e95d5d GL |
702 | |
703 | if (result) | |
704 | return result; | |
705 | ||
706 | dev_dbg(&dev->core, "%s:%d: status: %lxh\n", __func__, __LINE__, | |
707 | status); | |
708 | ||
709 | if (status & INTERRUPT_MASK_DISCONNECT) { | |
75c86e74 | 710 | dev->priv->stats.disconnect_interrupts++; |
74e95d5d GL |
711 | result = ps3_vuart_handle_interrupt_disconnect(dev); |
712 | if (result) | |
713 | ps3_vuart_disable_interrupt_disconnect(dev); | |
714 | } | |
715 | ||
716 | if (status & INTERRUPT_MASK_TX) { | |
75c86e74 | 717 | dev->priv->stats.tx_interrupts++; |
74e95d5d GL |
718 | result = ps3_vuart_handle_interrupt_tx(dev); |
719 | if (result) | |
720 | ps3_vuart_disable_interrupt_tx(dev); | |
721 | } | |
722 | ||
723 | if (status & INTERRUPT_MASK_RX) { | |
75c86e74 | 724 | dev->priv->stats.rx_interrupts++; |
74e95d5d GL |
725 | result = ps3_vuart_handle_interrupt_rx(dev); |
726 | if (result) | |
727 | ps3_vuart_disable_interrupt_rx(dev); | |
728 | } | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
75c86e74 GL |
733 | struct vuart_bus_priv { |
734 | const struct ports_bmp bmp; | |
74e95d5d | 735 | unsigned int virq; |
75c86e74 GL |
736 | struct semaphore probe_mutex; |
737 | int use_count; | |
74e95d5d | 738 | struct ps3_vuart_port_device *devices[PORT_COUNT]; |
75c86e74 | 739 | } static vuart_bus_priv; |
74e95d5d GL |
740 | |
741 | /** | |
742 | * ps3_vuart_irq_handler - first stage interrupt handler | |
743 | * | |
744 | * Loops finding any interrupting port and its associated instance data. | |
745 | * Passes control to the second stage port specific interrupt handler. Loops | |
746 | * until all outstanding interrupts are serviced. | |
747 | */ | |
748 | ||
749 | static irqreturn_t ps3_vuart_irq_handler(int irq, void *_private) | |
750 | { | |
75c86e74 | 751 | struct vuart_bus_priv *bus_priv; |
74e95d5d GL |
752 | |
753 | BUG_ON(!_private); | |
75c86e74 | 754 | bus_priv = (struct vuart_bus_priv *)_private; |
74e95d5d GL |
755 | |
756 | while (1) { | |
757 | unsigned int port; | |
758 | ||
75c86e74 | 759 | dump_ports_bmp(&bus_priv->bmp); |
74e95d5d | 760 | |
75c86e74 | 761 | port = (BITS_PER_LONG - 1) - __ilog2(bus_priv->bmp.status); |
74e95d5d GL |
762 | |
763 | if (port == BITS_PER_LONG) | |
764 | break; | |
765 | ||
766 | BUG_ON(port >= PORT_COUNT); | |
75c86e74 | 767 | BUG_ON(!bus_priv->devices[port]); |
74e95d5d | 768 | |
75c86e74 | 769 | ps3_vuart_handle_port_interrupt(bus_priv->devices[port]); |
74e95d5d GL |
770 | } |
771 | ||
772 | return IRQ_HANDLED; | |
773 | } | |
774 | ||
775 | static int ps3_vuart_match(struct device *_dev, struct device_driver *_drv) | |
776 | { | |
777 | int result; | |
778 | struct ps3_vuart_port_driver *drv = to_ps3_vuart_port_driver(_drv); | |
779 | struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev); | |
780 | ||
781 | result = dev->match_id == drv->match_id; | |
782 | ||
783 | dev_info(&dev->core, "%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, | |
784 | __LINE__, dev->match_id, dev->core.bus_id, drv->match_id, | |
785 | drv->core.name, (result ? "match" : "miss")); | |
786 | ||
787 | return result; | |
788 | } | |
789 | ||
74e95d5d GL |
790 | static int ps3_vuart_probe(struct device *_dev) |
791 | { | |
792 | int result; | |
75c86e74 | 793 | unsigned int port_number; |
74e95d5d GL |
794 | struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev); |
795 | struct ps3_vuart_port_driver *drv = | |
796 | to_ps3_vuart_port_driver(_dev->driver); | |
797 | ||
798 | dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); | |
799 | ||
800 | BUG_ON(!drv); | |
801 | ||
75c86e74 GL |
802 | down(&vuart_bus_priv.probe_mutex); |
803 | ||
804 | /* Setup vuart_bus_priv.devices[]. */ | |
805 | ||
806 | result = ps3_vuart_match_id_to_port(dev->match_id, | |
807 | &port_number); | |
74e95d5d GL |
808 | |
809 | if (result) { | |
810 | dev_dbg(&dev->core, "%s:%d: unknown match_id (%d)\n", | |
811 | __func__, __LINE__, dev->match_id); | |
812 | result = -EINVAL; | |
813 | goto fail_match; | |
814 | } | |
815 | ||
75c86e74 | 816 | if (vuart_bus_priv.devices[port_number]) { |
74e95d5d | 817 | dev_dbg(&dev->core, "%s:%d: port busy (%d)\n", __func__, |
75c86e74 | 818 | __LINE__, port_number); |
74e95d5d GL |
819 | result = -EBUSY; |
820 | goto fail_match; | |
821 | } | |
822 | ||
75c86e74 GL |
823 | vuart_bus_priv.devices[port_number] = dev; |
824 | ||
825 | /* Setup dev->priv. */ | |
826 | ||
827 | dev->priv = kzalloc(sizeof(struct ps3_vuart_port_priv), GFP_KERNEL); | |
828 | ||
829 | if (!dev->priv) { | |
830 | result = -ENOMEM; | |
831 | goto fail_alloc; | |
832 | } | |
833 | ||
834 | dev->priv->port_number = port_number; | |
74e95d5d | 835 | |
75c86e74 GL |
836 | INIT_LIST_HEAD(&dev->priv->tx_list.head); |
837 | spin_lock_init(&dev->priv->tx_list.lock); | |
838 | ||
839 | INIT_LIST_HEAD(&dev->priv->rx_list.head); | |
840 | spin_lock_init(&dev->priv->rx_list.lock); | |
841 | ||
842 | if (++vuart_bus_priv.use_count == 1) { | |
74e95d5d | 843 | |
861be32c | 844 | result = ps3_alloc_vuart_irq(PS3_BINDING_CPU_ANY, |
75c86e74 | 845 | (void*)&vuart_bus_priv.bmp.status, &vuart_bus_priv.virq); |
74e95d5d GL |
846 | |
847 | if (result) { | |
848 | dev_dbg(&dev->core, | |
849 | "%s:%d: ps3_alloc_vuart_irq failed (%d)\n", | |
850 | __func__, __LINE__, result); | |
851 | result = -EPERM; | |
852 | goto fail_alloc_irq; | |
853 | } | |
854 | ||
75c86e74 GL |
855 | result = request_irq(vuart_bus_priv.virq, ps3_vuart_irq_handler, |
856 | IRQF_DISABLED, "vuart", &vuart_bus_priv); | |
74e95d5d GL |
857 | |
858 | if (result) { | |
859 | dev_info(&dev->core, "%s:%d: request_irq failed (%d)\n", | |
860 | __func__, __LINE__, result); | |
861 | goto fail_request_irq; | |
862 | } | |
863 | } | |
864 | ||
74e95d5d | 865 | /* clear stale pending interrupts */ |
75c86e74 GL |
866 | |
867 | ps3_vuart_clear_rx_bytes(dev, 0); | |
868 | ||
869 | ps3_vuart_set_interrupt_mask(dev, INTERRUPT_MASK_RX); | |
74e95d5d GL |
870 | |
871 | ps3_vuart_set_triggers(dev, 1, 1); | |
872 | ||
873 | if (drv->probe) | |
874 | result = drv->probe(dev); | |
875 | else { | |
876 | result = 0; | |
877 | dev_info(&dev->core, "%s:%d: no probe method\n", __func__, | |
878 | __LINE__); | |
879 | } | |
880 | ||
881 | if (result) { | |
882 | dev_dbg(&dev->core, "%s:%d: drv->probe failed\n", | |
883 | __func__, __LINE__); | |
75c86e74 | 884 | down(&vuart_bus_priv.probe_mutex); |
74e95d5d GL |
885 | goto fail_probe; |
886 | } | |
887 | ||
75c86e74 GL |
888 | up(&vuart_bus_priv.probe_mutex); |
889 | ||
74e95d5d GL |
890 | return result; |
891 | ||
892 | fail_probe: | |
75c86e74 | 893 | ps3_vuart_set_interrupt_mask(dev, 0); |
74e95d5d | 894 | fail_request_irq: |
75c86e74 GL |
895 | ps3_free_vuart_irq(vuart_bus_priv.virq); |
896 | vuart_bus_priv.virq = NO_IRQ; | |
74e95d5d | 897 | fail_alloc_irq: |
75c86e74 GL |
898 | --vuart_bus_priv.use_count; |
899 | kfree(dev->priv); | |
900 | dev->priv = NULL; | |
901 | fail_alloc: | |
902 | vuart_bus_priv.devices[port_number] = 0; | |
74e95d5d | 903 | fail_match: |
75c86e74 | 904 | up(&vuart_bus_priv.probe_mutex); |
74e95d5d GL |
905 | dev_dbg(&dev->core, "%s:%d failed\n", __func__, __LINE__); |
906 | return result; | |
907 | } | |
908 | ||
909 | static int ps3_vuart_remove(struct device *_dev) | |
910 | { | |
911 | struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev); | |
912 | struct ps3_vuart_port_driver *drv = | |
913 | to_ps3_vuart_port_driver(_dev->driver); | |
914 | ||
75c86e74 GL |
915 | down(&vuart_bus_priv.probe_mutex); |
916 | ||
74e95d5d GL |
917 | dev_dbg(&dev->core, "%s:%d: %s\n", __func__, __LINE__, |
918 | dev->core.bus_id); | |
919 | ||
75c86e74 | 920 | BUG_ON(vuart_bus_priv.use_count < 1); |
74e95d5d GL |
921 | |
922 | if (drv->remove) | |
923 | drv->remove(dev); | |
924 | else | |
925 | dev_dbg(&dev->core, "%s:%d: %s no remove method\n", __func__, | |
926 | __LINE__, dev->core.bus_id); | |
927 | ||
75c86e74 | 928 | vuart_bus_priv.devices[dev->priv->port_number] = 0; |
74e95d5d | 929 | |
75c86e74 GL |
930 | if (--vuart_bus_priv.use_count == 0) { |
931 | BUG(); | |
932 | free_irq(vuart_bus_priv.virq, &vuart_bus_priv); | |
933 | ps3_free_vuart_irq(vuart_bus_priv.virq); | |
934 | vuart_bus_priv.virq = NO_IRQ; | |
74e95d5d | 935 | } |
75c86e74 GL |
936 | |
937 | kfree(dev->priv); | |
938 | dev->priv = NULL; | |
939 | ||
940 | up(&vuart_bus_priv.probe_mutex); | |
74e95d5d GL |
941 | return 0; |
942 | } | |
943 | ||
5b8e8ee6 GU |
944 | static void ps3_vuart_shutdown(struct device *_dev) |
945 | { | |
946 | struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev); | |
947 | struct ps3_vuart_port_driver *drv = | |
948 | to_ps3_vuart_port_driver(_dev->driver); | |
949 | ||
950 | dev_dbg(&dev->core, "%s:%d: %s\n", __func__, __LINE__, | |
951 | dev->core.bus_id); | |
952 | ||
953 | if (drv->shutdown) | |
954 | drv->shutdown(dev); | |
955 | else | |
956 | dev_dbg(&dev->core, "%s:%d: %s no shutdown method\n", __func__, | |
957 | __LINE__, dev->core.bus_id); | |
958 | } | |
959 | ||
74e95d5d | 960 | /** |
75c86e74 | 961 | * ps3_vuart_bus - The vuart bus instance. |
74e95d5d GL |
962 | * |
963 | * The vuart is managed as a bus that port devices connect to. | |
964 | */ | |
965 | ||
75c86e74 | 966 | struct bus_type ps3_vuart_bus = { |
74e95d5d GL |
967 | .name = "ps3_vuart", |
968 | .match = ps3_vuart_match, | |
969 | .probe = ps3_vuart_probe, | |
970 | .remove = ps3_vuart_remove, | |
5b8e8ee6 | 971 | .shutdown = ps3_vuart_shutdown, |
74e95d5d GL |
972 | }; |
973 | ||
75c86e74 | 974 | int __init ps3_vuart_bus_init(void) |
74e95d5d GL |
975 | { |
976 | int result; | |
977 | ||
978 | pr_debug("%s:%d:\n", __func__, __LINE__); | |
75c86e74 GL |
979 | |
980 | if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) | |
981 | return 0; | |
982 | ||
983 | init_MUTEX(&vuart_bus_priv.probe_mutex); | |
984 | result = bus_register(&ps3_vuart_bus); | |
74e95d5d | 985 | BUG_ON(result); |
75c86e74 | 986 | |
74e95d5d GL |
987 | return result; |
988 | } | |
989 | ||
75c86e74 | 990 | void __exit ps3_vuart_bus_exit(void) |
74e95d5d GL |
991 | { |
992 | pr_debug("%s:%d:\n", __func__, __LINE__); | |
75c86e74 | 993 | bus_unregister(&ps3_vuart_bus); |
74e95d5d GL |
994 | } |
995 | ||
75c86e74 GL |
996 | core_initcall(ps3_vuart_bus_init); |
997 | module_exit(ps3_vuart_bus_exit); | |
74e95d5d GL |
998 | |
999 | /** | |
1000 | * ps3_vuart_port_release_device - Remove a vuart port device. | |
1001 | */ | |
1002 | ||
1003 | static void ps3_vuart_port_release_device(struct device *_dev) | |
1004 | { | |
74e95d5d | 1005 | #if defined(DEBUG) |
75c86e74 GL |
1006 | struct ps3_vuart_port_device *dev = to_ps3_vuart_port_device(_dev); |
1007 | ||
1008 | dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__); | |
1009 | ||
1010 | BUG_ON(dev->priv && "forgot to free"); | |
1011 | memset(&dev->core, 0, sizeof(dev->core)); | |
74e95d5d | 1012 | #endif |
74e95d5d GL |
1013 | } |
1014 | ||
1015 | /** | |
1016 | * ps3_vuart_port_device_register - Add a vuart port device. | |
1017 | */ | |
1018 | ||
1019 | int ps3_vuart_port_device_register(struct ps3_vuart_port_device *dev) | |
1020 | { | |
74e95d5d GL |
1021 | static unsigned int dev_count = 1; |
1022 | ||
75c86e74 GL |
1023 | BUG_ON(dev->priv && "forgot to free"); |
1024 | ||
74e95d5d | 1025 | dev->core.parent = NULL; |
75c86e74 | 1026 | dev->core.bus = &ps3_vuart_bus; |
74e95d5d GL |
1027 | dev->core.release = ps3_vuart_port_release_device; |
1028 | ||
1029 | snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "vuart_%02x", | |
1030 | dev_count++); | |
1031 | ||
1032 | dev_dbg(&dev->core, "%s:%d register\n", __func__, __LINE__); | |
1033 | ||
75c86e74 | 1034 | return device_register(&dev->core); |
74e95d5d GL |
1035 | } |
1036 | ||
1037 | EXPORT_SYMBOL_GPL(ps3_vuart_port_device_register); | |
1038 | ||
1039 | /** | |
1040 | * ps3_vuart_port_driver_register - Add a vuart port device driver. | |
1041 | */ | |
1042 | ||
1043 | int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv) | |
1044 | { | |
1045 | int result; | |
1046 | ||
1047 | pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.name); | |
75c86e74 | 1048 | drv->core.bus = &ps3_vuart_bus; |
74e95d5d GL |
1049 | result = driver_register(&drv->core); |
1050 | return result; | |
1051 | } | |
1052 | ||
1053 | EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_register); | |
1054 | ||
1055 | /** | |
1056 | * ps3_vuart_port_driver_unregister - Remove a vuart port device driver. | |
1057 | */ | |
1058 | ||
1059 | void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv) | |
1060 | { | |
75c86e74 | 1061 | pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.name); |
74e95d5d GL |
1062 | driver_unregister(&drv->core); |
1063 | } | |
1064 | ||
1065 | EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_unregister); |