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ext4: Replace hackish ext4_mb_poll_new_transaction with commit callback
[linux-2.6/mini2440.git] / sound / ppc / snd_ps3.c
blob20d0e328288ab6ae4ea24abe202b6a3d0dd3d442
1 /*
2 * Audio support for PS3
3 * Copyright (C) 2007 Sony Computer Entertainment Inc.
4 * All rights reserved.
5 * Copyright 2006, 2007 Sony Corporation
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
9 * as published by the Free Software Foundation; version 2 of the Licence.
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/init.h>
22 #include <linux/slab.h>
23 #include <linux/io.h>
24 #include <linux/interrupt.h>
25 #include <sound/core.h>
26 #include <sound/initval.h>
27 #include <sound/pcm.h>
28 #include <sound/asound.h>
29 #include <sound/memalloc.h>
30 #include <sound/pcm_params.h>
31 #include <sound/control.h>
32 #include <linux/dmapool.h>
33 #include <linux/dma-mapping.h>
34 #include <asm/firmware.h>
35 #include <asm/dma.h>
36 #include <asm/lv1call.h>
37 #include <asm/ps3.h>
38 #include <asm/ps3av.h>
39
40 #include "snd_ps3_reg.h"
41 #include "snd_ps3.h"
42
43 MODULE_LICENSE("GPL v2");
44 MODULE_DESCRIPTION("PS3 sound driver");
45 MODULE_AUTHOR("Sony Computer Entertainment Inc.");
46
47 /* module entries */
48 static int __init snd_ps3_init(void);
49 static void __exit snd_ps3_exit(void);
50
51 /* ALSA snd driver ops */
52 static int snd_ps3_pcm_open(struct snd_pcm_substream *substream);
53 static int snd_ps3_pcm_close(struct snd_pcm_substream *substream);
54 static int snd_ps3_pcm_prepare(struct snd_pcm_substream *substream);
55 static int snd_ps3_pcm_trigger(struct snd_pcm_substream *substream,
56 int cmd);
57 static snd_pcm_uframes_t snd_ps3_pcm_pointer(struct snd_pcm_substream
58 *substream);
59 static int snd_ps3_pcm_hw_params(struct snd_pcm_substream *substream,
60 struct snd_pcm_hw_params *hw_params);
61 static int snd_ps3_pcm_hw_free(struct snd_pcm_substream *substream);
62
63
64 /* ps3_system_bus_driver entries */
65 static int __init snd_ps3_driver_probe(struct ps3_system_bus_device *dev);
66 static int snd_ps3_driver_remove(struct ps3_system_bus_device *dev);
67
68 /* address setup */
69 static int snd_ps3_map_mmio(void);
70 static void snd_ps3_unmap_mmio(void);
71 static int snd_ps3_allocate_irq(void);
72 static void snd_ps3_free_irq(void);
73 static void snd_ps3_audio_set_base_addr(uint64_t ioaddr_start);
74
75 /* interrupt handler */
76 static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id);
77
78
79 /* set sampling rate/format */
80 static int snd_ps3_set_avsetting(struct snd_pcm_substream *substream);
81 /* take effect parameter change */
82 static int snd_ps3_change_avsetting(struct snd_ps3_card_info *card);
83 /* initialize avsetting and take it effect */
84 static int snd_ps3_init_avsetting(struct snd_ps3_card_info *card);
85 /* setup dma */
86 static int snd_ps3_program_dma(struct snd_ps3_card_info *card,
87 enum snd_ps3_dma_filltype filltype);
88 static void snd_ps3_wait_for_dma_stop(struct snd_ps3_card_info *card);
89
90 static dma_addr_t v_to_bus(struct snd_ps3_card_info *, void *vaddr, int ch);
91
92
93 module_init(snd_ps3_init);
94 module_exit(snd_ps3_exit);
95
96 /*
97 * global
98 */
99 static struct snd_ps3_card_info the_card;
100
101 static int snd_ps3_start_delay = CONFIG_SND_PS3_DEFAULT_START_DELAY;
102
103 module_param_named(start_delay, snd_ps3_start_delay, uint, 0644);
104 MODULE_PARM_DESC(start_delay, "time to insert silent data in milisec");
105
106 static int index = SNDRV_DEFAULT_IDX1;
107 static char *id = SNDRV_DEFAULT_STR1;
108
109 module_param(index, int, 0444);
110 MODULE_PARM_DESC(index, "Index value for PS3 soundchip.");
111 module_param(id, charp, 0444);
112 MODULE_PARM_DESC(id, "ID string for PS3 soundchip.");
113
114
115 /*
116 * PS3 audio register access
117 */
118 static inline u32 read_reg(unsigned int reg)
119 {
120 return in_be32(the_card.mapped_mmio_vaddr + reg);
121 }
122 static inline void write_reg(unsigned int reg, u32 val)
123 {
124 out_be32(the_card.mapped_mmio_vaddr + reg, val);
125 }
126 static inline void update_reg(unsigned int reg, u32 or_val)
127 {
128 u32 newval = read_reg(reg) | or_val;
129 write_reg(reg, newval);
130 }
131 static inline void update_mask_reg(unsigned int reg, u32 mask, u32 or_val)
132 {
133 u32 newval = (read_reg(reg) & mask) | or_val;
134 write_reg(reg, newval);
135 }
136
137 /*
138 * ALSA defs
139 */
140 static const struct snd_pcm_hardware snd_ps3_pcm_hw = {
141 .info = (SNDRV_PCM_INFO_MMAP |
142 SNDRV_PCM_INFO_NONINTERLEAVED |
143 SNDRV_PCM_INFO_MMAP_VALID),
144 .formats = (SNDRV_PCM_FMTBIT_S16_BE |
145 SNDRV_PCM_FMTBIT_S24_BE),
146 .rates = (SNDRV_PCM_RATE_44100 |
147 SNDRV_PCM_RATE_48000 |
148 SNDRV_PCM_RATE_88200 |
149 SNDRV_PCM_RATE_96000),
150 .rate_min = 44100,
151 .rate_max = 96000,
152
153 .channels_min = 2, /* stereo only */
154 .channels_max = 2,
155
156 .buffer_bytes_max = PS3_AUDIO_FIFO_SIZE * 64,
157
158 /* interrupt by four stages */
159 .period_bytes_min = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
160 .period_bytes_max = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
161
162 .periods_min = 16,
163 .periods_max = 32, /* buffer_size_max/ period_bytes_max */
164
165 .fifo_size = PS3_AUDIO_FIFO_SIZE
166 };
167
168 static struct snd_pcm_ops snd_ps3_pcm_spdif_ops =
169 {
170 .open = snd_ps3_pcm_open,
171 .close = snd_ps3_pcm_close,
172 .prepare = snd_ps3_pcm_prepare,
173 .ioctl = snd_pcm_lib_ioctl,
174 .trigger = snd_ps3_pcm_trigger,
175 .pointer = snd_ps3_pcm_pointer,
176 .hw_params = snd_ps3_pcm_hw_params,
177 .hw_free = snd_ps3_pcm_hw_free
178 };
179
180 static int snd_ps3_verify_dma_stop(struct snd_ps3_card_info *card,
181 int count, int force_stop)
182 {
183 int dma_ch, done, retries, stop_forced = 0;
184 uint32_t status;
185
186 for (dma_ch = 0; dma_ch < 8; dma_ch ++) {
187 retries = count;
188 do {
189 status = read_reg(PS3_AUDIO_KICK(dma_ch)) &
190 PS3_AUDIO_KICK_STATUS_MASK;
191 switch (status) {
192 case PS3_AUDIO_KICK_STATUS_DONE:
193 case PS3_AUDIO_KICK_STATUS_NOTIFY:
194 case PS3_AUDIO_KICK_STATUS_CLEAR:
195 case PS3_AUDIO_KICK_STATUS_ERROR:
196 done = 1;
197 break;
198 default:
199 done = 0;
200 udelay(10);
201 }
202 } while (!done && --retries);
203 if (!retries && force_stop) {
204 pr_info("%s: DMA ch %d is not stopped.",
205 __func__, dma_ch);
206 /* last resort. force to stop dma.
207 * NOTE: this cause DMA done interrupts
208 */
209 update_reg(PS3_AUDIO_CONFIG, PS3_AUDIO_CONFIG_CLEAR);
210 stop_forced = 1;
211 }
212 }
213 return stop_forced;
214 }
215
216 /*
217 * wait for all dma is done.
218 * NOTE: caller should reset card->running before call.
219 * If not, the interrupt handler will re-start DMA,
220 * then DMA is never stopped.
221 */
222 static void snd_ps3_wait_for_dma_stop(struct snd_ps3_card_info *card)
223 {
224 int stop_forced;
225 /*
226 * wait for the last dma is done
227 */
228
229 /*
230 * expected maximum DMA done time is 5.7ms + something (DMA itself).
231 * 5.7ms is from 16bit/sample 2ch 44.1Khz; the time next
232 * DMA kick event would occur.
233 */
234 stop_forced = snd_ps3_verify_dma_stop(card, 700, 1);
235
236 /*
237 * clear outstanding interrupts.
238 */
239 update_reg(PS3_AUDIO_INTR_0, 0);
240 update_reg(PS3_AUDIO_AX_IS, 0);
241
242 /*
243 *revert CLEAR bit since it will not reset automatically after DMA stop
244 */
245 if (stop_forced)
246 update_mask_reg(PS3_AUDIO_CONFIG, ~PS3_AUDIO_CONFIG_CLEAR, 0);
247 /* ensure the hardware sees changes */
248 wmb();
249 }
250
251 static void snd_ps3_kick_dma(struct snd_ps3_card_info *card)
252 {
253
254 update_reg(PS3_AUDIO_KICK(0), PS3_AUDIO_KICK_REQUEST);
255 /* ensure the hardware sees the change */
256 wmb();
257 }
258
259 /*
260 * convert virtual addr to ioif bus addr.
261 */
262 static dma_addr_t v_to_bus(struct snd_ps3_card_info *card,
263 void * paddr,
264 int ch)
265 {
266 return card->dma_start_bus_addr[ch] +
267 (paddr - card->dma_start_vaddr[ch]);
268 };
269
270
271 /*
272 * increment ring buffer pointer.
273 * NOTE: caller must hold write spinlock
274 */
275 static void snd_ps3_bump_buffer(struct snd_ps3_card_info *card,
276 enum snd_ps3_ch ch, size_t byte_count,
277 int stage)
278 {
279 if (!stage)
280 card->dma_last_transfer_vaddr[ch] =
281 card->dma_next_transfer_vaddr[ch];
282 card->dma_next_transfer_vaddr[ch] += byte_count;
283 if ((card->dma_start_vaddr[ch] + (card->dma_buffer_size / 2)) <=
284 card->dma_next_transfer_vaddr[ch]) {
285 card->dma_next_transfer_vaddr[ch] = card->dma_start_vaddr[ch];
286 }
287 }
288 /*
289 * setup dmac to send data to audio and attenuate samples on the ring buffer
290 */
291 static int snd_ps3_program_dma(struct snd_ps3_card_info *card,
292 enum snd_ps3_dma_filltype filltype)
293 {
294 /* this dmac does not support over 4G */
295 uint32_t dma_addr;
296 int fill_stages, dma_ch, stage;
297 enum snd_ps3_ch ch;
298 uint32_t ch0_kick_event = 0; /* initialize to mute gcc */
299 void *start_vaddr;
300 unsigned long irqsave;
301 int silent = 0;
302
303 switch (filltype) {
304 case SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL:
305 silent = 1;
306 /* intentionally fall thru */
307 case SND_PS3_DMA_FILLTYPE_FIRSTFILL:
308 ch0_kick_event = PS3_AUDIO_KICK_EVENT_ALWAYS;
309 break;
310
311 case SND_PS3_DMA_FILLTYPE_SILENT_RUNNING:
312 silent = 1;
313 /* intentionally fall thru */
314 case SND_PS3_DMA_FILLTYPE_RUNNING:
315 ch0_kick_event = PS3_AUDIO_KICK_EVENT_SERIALOUT0_EMPTY;
316 break;
317 }
318
319 snd_ps3_verify_dma_stop(card, 700, 0);
320 fill_stages = 4;
321 spin_lock_irqsave(&card->dma_lock, irqsave);
322 for (ch = 0; ch < 2; ch++) {
323 start_vaddr = card->dma_next_transfer_vaddr[0];
324 for (stage = 0; stage < fill_stages; stage ++) {
325 dma_ch = stage * 2 + ch;
326 if (silent)
327 dma_addr = card->null_buffer_start_dma_addr;
328 else
329 dma_addr =
330 v_to_bus(card,
331 card->dma_next_transfer_vaddr[ch],
332 ch);
333
334 write_reg(PS3_AUDIO_SOURCE(dma_ch),
335 (PS3_AUDIO_SOURCE_TARGET_SYSTEM_MEMORY |
336 dma_addr));
337
338 /* dst: fixed to 3wire#0 */
339 if (ch == 0)
340 write_reg(PS3_AUDIO_DEST(dma_ch),
341 (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
342 PS3_AUDIO_AO_3W_LDATA(0)));
343 else
344 write_reg(PS3_AUDIO_DEST(dma_ch),
345 (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
346 PS3_AUDIO_AO_3W_RDATA(0)));
347
348 /* count always 1 DMA block (1/2 stage = 128 bytes) */
349 write_reg(PS3_AUDIO_DMASIZE(dma_ch), 0);
350 /* bump pointer if needed */
351 if (!silent)
352 snd_ps3_bump_buffer(card, ch,
353 PS3_AUDIO_DMAC_BLOCK_SIZE,
354 stage);
355
356 /* kick event */
357 if (dma_ch == 0)
358 write_reg(PS3_AUDIO_KICK(dma_ch),
359 ch0_kick_event);
360 else
361 write_reg(PS3_AUDIO_KICK(dma_ch),
362 PS3_AUDIO_KICK_EVENT_AUDIO_DMA(dma_ch
363 - 1) |
364 PS3_AUDIO_KICK_REQUEST);
365 }
366 }
367 /* ensure the hardware sees the change */
368 wmb();
369 spin_unlock_irqrestore(&card->dma_lock, irqsave);
370
371 return 0;
372 }
373
374 /*
375 * audio mute on/off
376 * mute_on : 0 output enabled
377 * 1 mute
378 */
379 static int snd_ps3_mute(int mute_on)
380 {
381 return ps3av_audio_mute(mute_on);
382 }
383
384 /*
385 * PCM operators
386 */
387 static int snd_ps3_pcm_open(struct snd_pcm_substream *substream)
388 {
389 struct snd_pcm_runtime *runtime = substream->runtime;
390 struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
391 int pcm_index;
392
393 pcm_index = substream->pcm->device;
394 /* to retrieve substream/runtime in interrupt handler */
395 card->substream = substream;
396
397 runtime->hw = snd_ps3_pcm_hw;
398
399 card->start_delay = snd_ps3_start_delay;
400
401 /* mute off */
402 snd_ps3_mute(0); /* this function sleep */
403
404 snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
405 PS3_AUDIO_FIFO_STAGE_SIZE * 4 * 2);
406 return 0;
407 };
408
409 static int snd_ps3_pcm_hw_params(struct snd_pcm_substream *substream,
410 struct snd_pcm_hw_params *hw_params)
411 {
412 size_t size;
413
414 /* alloc transport buffer */
415 size = params_buffer_bytes(hw_params);
416 snd_pcm_lib_malloc_pages(substream, size);
417 return 0;
418 };
419
420 static int snd_ps3_delay_to_bytes(struct snd_pcm_substream *substream,
421 unsigned int delay_ms)
422 {
423 int ret;
424 int rate ;
425
426 rate = substream->runtime->rate;
427 ret = snd_pcm_format_size(substream->runtime->format,
428 rate * delay_ms / 1000)
429 * substream->runtime->channels;
430
431 pr_debug(KERN_ERR "%s: time=%d rate=%d bytes=%ld, frames=%d, ret=%d\n",
432 __func__,
433 delay_ms,
434 rate,
435 snd_pcm_format_size(substream->runtime->format, rate),
436 rate * delay_ms / 1000,
437 ret);
438
439 return ret;
440 };
441
442 static int snd_ps3_pcm_prepare(struct snd_pcm_substream *substream)
443 {
444 struct snd_pcm_runtime *runtime = substream->runtime;
445 struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
446 unsigned long irqsave;
447
448 if (!snd_ps3_set_avsetting(substream)) {
449 /* some parameter changed */
450 write_reg(PS3_AUDIO_AX_IE,
451 PS3_AUDIO_AX_IE_ASOBEIE(0) |
452 PS3_AUDIO_AX_IE_ASOBUIE(0));
453 /*
454 * let SPDIF device re-lock with SPDIF signal,
455 * start with some silence
456 */
457 card->silent = snd_ps3_delay_to_bytes(substream,
458 card->start_delay) /
459 (PS3_AUDIO_FIFO_STAGE_SIZE * 4); /* every 4 times */
460 }
461
462 /* restart ring buffer pointer */
463 spin_lock_irqsave(&card->dma_lock, irqsave);
464 {
465 card->dma_buffer_size = runtime->dma_bytes;
466
467 card->dma_last_transfer_vaddr[SND_PS3_CH_L] =
468 card->dma_next_transfer_vaddr[SND_PS3_CH_L] =
469 card->dma_start_vaddr[SND_PS3_CH_L] =
470 runtime->dma_area;
471 card->dma_start_bus_addr[SND_PS3_CH_L] = runtime->dma_addr;
472
473 card->dma_last_transfer_vaddr[SND_PS3_CH_R] =
474 card->dma_next_transfer_vaddr[SND_PS3_CH_R] =
475 card->dma_start_vaddr[SND_PS3_CH_R] =
476 runtime->dma_area + (runtime->dma_bytes / 2);
477 card->dma_start_bus_addr[SND_PS3_CH_R] =
478 runtime->dma_addr + (runtime->dma_bytes / 2);
479
480 pr_debug("%s: vaddr=%p bus=%#lx\n", __func__,
481 card->dma_start_vaddr[SND_PS3_CH_L],
482 card->dma_start_bus_addr[SND_PS3_CH_L]);
483
484 }
485 spin_unlock_irqrestore(&card->dma_lock, irqsave);
486
487 /* ensure the hardware sees the change */
488 mb();
489
490 return 0;
491 };
492
493 static int snd_ps3_pcm_trigger(struct snd_pcm_substream *substream,
494 int cmd)
495 {
496 struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
497 int ret = 0;
498
499 switch (cmd) {
500 case SNDRV_PCM_TRIGGER_START:
501 /* clear outstanding interrupts */
502 update_reg(PS3_AUDIO_AX_IS, 0);
503
504 spin_lock(&card->dma_lock);
505 {
506 card->running = 1;
507 }
508 spin_unlock(&card->dma_lock);
509
510 snd_ps3_program_dma(card,
511 SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
512 snd_ps3_kick_dma(card);
513 while (read_reg(PS3_AUDIO_KICK(7)) &
514 PS3_AUDIO_KICK_STATUS_MASK) {
515 udelay(1);
516 }
517 snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
518 snd_ps3_kick_dma(card);
519 break;
520
521 case SNDRV_PCM_TRIGGER_STOP:
522 spin_lock(&card->dma_lock);
523 {
524 card->running = 0;
525 }
526 spin_unlock(&card->dma_lock);
527 snd_ps3_wait_for_dma_stop(card);
528 break;
529 default:
530 break;
531
532 }
533
534 return ret;
535 };
536
537 /*
538 * report current pointer
539 */
540 static snd_pcm_uframes_t snd_ps3_pcm_pointer(
541 struct snd_pcm_substream *substream)
542 {
543 struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
544 size_t bytes;
545 snd_pcm_uframes_t ret;
546
547 spin_lock(&card->dma_lock);
548 {
549 bytes = (size_t)(card->dma_last_transfer_vaddr[SND_PS3_CH_L] -
550 card->dma_start_vaddr[SND_PS3_CH_L]);
551 }
552 spin_unlock(&card->dma_lock);
553
554 ret = bytes_to_frames(substream->runtime, bytes * 2);
555
556 return ret;
557 };
558
559 static int snd_ps3_pcm_hw_free(struct snd_pcm_substream *substream)
560 {
561 int ret;
562 ret = snd_pcm_lib_free_pages(substream);
563 return ret;
564 };
565
566 static int snd_ps3_pcm_close(struct snd_pcm_substream *substream)
567 {
568 /* mute on */
569 snd_ps3_mute(1);
570 return 0;
571 };
572
573 static void snd_ps3_audio_fixup(struct snd_ps3_card_info *card)
574 {
575 /*
576 * avsetting driver seems to never change the followings
577 * so, init them here once
578 */
579
580 /* no dma interrupt needed */
581 write_reg(PS3_AUDIO_INTR_EN_0, 0);
582
583 /* use every 4 buffer empty interrupt */
584 update_mask_reg(PS3_AUDIO_AX_IC,
585 PS3_AUDIO_AX_IC_AASOIMD_MASK,
586 PS3_AUDIO_AX_IC_AASOIMD_EVERY4);
587
588 /* enable 3wire clocks */
589 update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
590 ~(PS3_AUDIO_AO_3WMCTRL_ASOBCLKD_DISABLED |
591 PS3_AUDIO_AO_3WMCTRL_ASOLRCKD_DISABLED),
592 0);
593 update_reg(PS3_AUDIO_AO_3WMCTRL,
594 PS3_AUDIO_AO_3WMCTRL_ASOPLRCK_DEFAULT);
595 }
596
597 /*
598 * av setting
599 * NOTE: calling this function may generate audio interrupt.
600 */
601 static int snd_ps3_change_avsetting(struct snd_ps3_card_info *card)
602 {
603 int ret, retries, i;
604 pr_debug("%s: start\n", __func__);
605
606 ret = ps3av_set_audio_mode(card->avs.avs_audio_ch,
607 card->avs.avs_audio_rate,
608 card->avs.avs_audio_width,
609 card->avs.avs_audio_format,
610 card->avs.avs_audio_source);
611 /*
612 * Reset the following unwanted settings:
613 */
614
615 /* disable all 3wire buffers */
616 update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
617 ~(PS3_AUDIO_AO_3WMCTRL_ASOEN(0) |
618 PS3_AUDIO_AO_3WMCTRL_ASOEN(1) |
619 PS3_AUDIO_AO_3WMCTRL_ASOEN(2) |
620 PS3_AUDIO_AO_3WMCTRL_ASOEN(3)),
621 0);
622 wmb(); /* ensure the hardware sees the change */
623 /* wait for actually stopped */
624 retries = 1000;
625 while ((read_reg(PS3_AUDIO_AO_3WMCTRL) &
626 (PS3_AUDIO_AO_3WMCTRL_ASORUN(0) |
627 PS3_AUDIO_AO_3WMCTRL_ASORUN(1) |
628 PS3_AUDIO_AO_3WMCTRL_ASORUN(2) |
629 PS3_AUDIO_AO_3WMCTRL_ASORUN(3))) &&
630 --retries) {
631 udelay(1);
632 }
633
634 /* reset buffer pointer */
635 for (i = 0; i < 4; i++) {
636 update_reg(PS3_AUDIO_AO_3WCTRL(i),
637 PS3_AUDIO_AO_3WCTRL_ASOBRST_RESET);
638 udelay(10);
639 }
640 wmb(); /* ensure the hardware actually start resetting */
641
642 /* enable 3wire#0 buffer */
643 update_reg(PS3_AUDIO_AO_3WMCTRL, PS3_AUDIO_AO_3WMCTRL_ASOEN(0));
644
645
646 /* In 24bit mode,ALSA inserts a zero byte at first byte of per sample */
647 update_mask_reg(PS3_AUDIO_AO_3WCTRL(0),
648 ~PS3_AUDIO_AO_3WCTRL_ASODF,
649 PS3_AUDIO_AO_3WCTRL_ASODF_LSB);
650 update_mask_reg(PS3_AUDIO_AO_SPDCTRL(0),
651 ~PS3_AUDIO_AO_SPDCTRL_SPODF,
652 PS3_AUDIO_AO_SPDCTRL_SPODF_LSB);
653 /* ensure all the setting above is written back to register */
654 wmb();
655 /* avsetting driver altered AX_IE, caller must reset it if you want */
656 pr_debug("%s: end\n", __func__);
657 return ret;
658 }
659
660 static int snd_ps3_init_avsetting(struct snd_ps3_card_info *card)
661 {
662 int ret;
663 pr_debug("%s: start\n", __func__);
664 card->avs.avs_audio_ch = PS3AV_CMD_AUDIO_NUM_OF_CH_2;
665 card->avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
666 card->avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
667 card->avs.avs_audio_format = PS3AV_CMD_AUDIO_FORMAT_PCM;
668 card->avs.avs_audio_source = PS3AV_CMD_AUDIO_SOURCE_SERIAL;
669
670 ret = snd_ps3_change_avsetting(card);
671
672 snd_ps3_audio_fixup(card);
673
674 /* to start to generate SPDIF signal, fill data */
675 snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
676 snd_ps3_kick_dma(card);
677 pr_debug("%s: end\n", __func__);
678 return ret;
679 }
680
681 /*
682 * set sampling rate according to the substream
683 */
684 static int snd_ps3_set_avsetting(struct snd_pcm_substream *substream)
685 {
686 struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
687 struct snd_ps3_avsetting_info avs;
688
689 avs = card->avs;
690
691 pr_debug("%s: called freq=%d width=%d\n", __func__,
692 substream->runtime->rate,
693 snd_pcm_format_width(substream->runtime->format));
694
695 pr_debug("%s: before freq=%d width=%d\n", __func__,
696 card->avs.avs_audio_rate, card->avs.avs_audio_width);
697
698 /* sample rate */
699 switch (substream->runtime->rate) {
700 case 44100:
701 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_44K;
702 break;
703 case 48000:
704 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
705 break;
706 case 88200:
707 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_88K;
708 break;
709 case 96000:
710 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_96K;
711 break;
712 default:
713 pr_info("%s: invalid rate %d\n", __func__,
714 substream->runtime->rate);
715 return 1;
716 }
717
718 /* width */
719 switch (snd_pcm_format_width(substream->runtime->format)) {
720 case 16:
721 avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
722 break;
723 case 24:
724 avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_24;
725 break;
726 default:
727 pr_info("%s: invalid width %d\n", __func__,
728 snd_pcm_format_width(substream->runtime->format));
729 return 1;
730 }
731
732 if ((card->avs.avs_audio_width != avs.avs_audio_width) ||
733 (card->avs.avs_audio_rate != avs.avs_audio_rate)) {
734 card->avs = avs;
735 snd_ps3_change_avsetting(card);
736
737 pr_debug("%s: after freq=%d width=%d\n", __func__,
738 card->avs.avs_audio_rate, card->avs.avs_audio_width);
739
740 return 0;
741 } else
742 return 1;
743 }
744
745
746
747 static int snd_ps3_map_mmio(void)
748 {
749 the_card.mapped_mmio_vaddr =
750 ioremap(the_card.ps3_dev->m_region->bus_addr,
751 the_card.ps3_dev->m_region->len);
752
753 if (!the_card.mapped_mmio_vaddr) {
754 pr_info("%s: ioremap 0 failed p=%#lx l=%#lx \n",
755 __func__, the_card.ps3_dev->m_region->lpar_addr,
756 the_card.ps3_dev->m_region->len);
757 return -ENXIO;
758 }
759
760 return 0;
761 };
762
763 static void snd_ps3_unmap_mmio(void)
764 {
765 iounmap(the_card.mapped_mmio_vaddr);
766 the_card.mapped_mmio_vaddr = NULL;
767 }
768
769 static int snd_ps3_allocate_irq(void)
770 {
771 int ret;
772 u64 lpar_addr, lpar_size;
773 u64 __iomem *mapped;
774
775 /* FIXME: move this to device_init (H/W probe) */
776
777 /* get irq outlet */
778 ret = lv1_gpu_device_map(1, &lpar_addr, &lpar_size);
779 if (ret) {
780 pr_info("%s: device map 1 failed %d\n", __func__,
781 ret);
782 return -ENXIO;
783 }
784
785 mapped = ioremap(lpar_addr, lpar_size);
786 if (!mapped) {
787 pr_info("%s: ioremap 1 failed \n", __func__);
788 return -ENXIO;
789 }
790
791 the_card.audio_irq_outlet = in_be64(mapped);
792
793 iounmap(mapped);
794 ret = lv1_gpu_device_unmap(1);
795 if (ret)
796 pr_info("%s: unmap 1 failed\n", __func__);
797
798 /* irq */
799 ret = ps3_irq_plug_setup(PS3_BINDING_CPU_ANY,
800 the_card.audio_irq_outlet,
801 &the_card.irq_no);
802 if (ret) {
803 pr_info("%s:ps3_alloc_irq failed (%d)\n", __func__, ret);
804 return ret;
805 }
806
807 ret = request_irq(the_card.irq_no, snd_ps3_interrupt, IRQF_DISABLED,
808 SND_PS3_DRIVER_NAME, &the_card);
809 if (ret) {
810 pr_info("%s: request_irq failed (%d)\n", __func__, ret);
811 goto cleanup_irq;
812 }
813
814 return 0;
815
816 cleanup_irq:
817 ps3_irq_plug_destroy(the_card.irq_no);
818 return ret;
819 };
820
821 static void snd_ps3_free_irq(void)
822 {
823 free_irq(the_card.irq_no, &the_card);
824 ps3_irq_plug_destroy(the_card.irq_no);
825 }
826
827 static void snd_ps3_audio_set_base_addr(uint64_t ioaddr_start)
828 {
829 uint64_t val;
830 int ret;
831
832 val = (ioaddr_start & (0x0fUL << 32)) >> (32 - 20) |
833 (0x03UL << 24) |
834 (0x0fUL << 12) |
835 (PS3_AUDIO_IOID);
836
837 ret = lv1_gpu_attribute(0x100, 0x007, val, 0, 0);
838 if (ret)
839 pr_info("%s: gpu_attribute failed %d\n", __func__,
840 ret);
841 }
842
843 static int __init snd_ps3_driver_probe(struct ps3_system_bus_device *dev)
844 {
845 int ret;
846 u64 lpar_addr, lpar_size;
847
848 BUG_ON(!firmware_has_feature(FW_FEATURE_PS3_LV1));
849 BUG_ON(dev->match_id != PS3_MATCH_ID_SOUND);
850
851 the_card.ps3_dev = dev;
852
853 ret = ps3_open_hv_device(dev);
854
855 if (ret)
856 return -ENXIO;
857
858 /* setup MMIO */
859 ret = lv1_gpu_device_map(2, &lpar_addr, &lpar_size);
860 if (ret) {
861 pr_info("%s: device map 2 failed %d\n", __func__, ret);
862 goto clean_open;
863 }
864 ps3_mmio_region_init(dev, dev->m_region, lpar_addr, lpar_size,
865 PAGE_SHIFT);
866
867 ret = snd_ps3_map_mmio();
868 if (ret)
869 goto clean_dev_map;
870
871 /* setup DMA area */
872 ps3_dma_region_init(dev, dev->d_region,
873 PAGE_SHIFT, /* use system page size */
874 0, /* dma type; not used */
875 NULL,
876 _ALIGN_UP(SND_PS3_DMA_REGION_SIZE, PAGE_SIZE));
877 dev->d_region->ioid = PS3_AUDIO_IOID;
878
879 ret = ps3_dma_region_create(dev->d_region);
880 if (ret) {
881 pr_info("%s: region_create\n", __func__);
882 goto clean_mmio;
883 }
884
885 snd_ps3_audio_set_base_addr(dev->d_region->bus_addr);
886
887 /* CONFIG_SND_PS3_DEFAULT_START_DELAY */
888 the_card.start_delay = snd_ps3_start_delay;
889
890 /* irq */
891 if (snd_ps3_allocate_irq()) {
892 ret = -ENXIO;
893 goto clean_dma_region;
894 }
895
896 /* create card instance */
897 the_card.card = snd_card_new(index, id, THIS_MODULE, 0);
898 if (!the_card.card) {
899 ret = -ENXIO;
900 goto clean_irq;
901 }
902
903 strcpy(the_card.card->driver, "PS3");
904 strcpy(the_card.card->shortname, "PS3");
905 strcpy(the_card.card->longname, "PS3 sound");
906 /* create PCM devices instance */
907 /* NOTE:this driver works assuming pcm:substream = 1:1 */
908 ret = snd_pcm_new(the_card.card,
909 "SPDIF",
910 0, /* instance index, will be stored pcm.device*/
911 1, /* output substream */
912 0, /* input substream */
913 &(the_card.pcm));
914 if (ret)
915 goto clean_card;
916
917 the_card.pcm->private_data = &the_card;
918 strcpy(the_card.pcm->name, "SPDIF");
919
920 /* set pcm ops */
921 snd_pcm_set_ops(the_card.pcm, SNDRV_PCM_STREAM_PLAYBACK,
922 &snd_ps3_pcm_spdif_ops);
923
924 the_card.pcm->info_flags = SNDRV_PCM_INFO_NONINTERLEAVED;
925 /* pre-alloc PCM DMA buffer*/
926 ret = snd_pcm_lib_preallocate_pages_for_all(the_card.pcm,
927 SNDRV_DMA_TYPE_DEV,
928 &dev->core,
929 SND_PS3_PCM_PREALLOC_SIZE,
930 SND_PS3_PCM_PREALLOC_SIZE);
931 if (ret < 0) {
932 pr_info("%s: prealloc failed\n", __func__);
933 goto clean_card;
934 }
935
936 /*
937 * allocate null buffer
938 * its size should be lager than PS3_AUDIO_FIFO_STAGE_SIZE * 2
939 * PAGE_SIZE is enogh
940 */
941 if (!(the_card.null_buffer_start_vaddr =
942 dma_alloc_coherent(&the_card.ps3_dev->core,
943 PAGE_SIZE,
944 &the_card.null_buffer_start_dma_addr,
945 GFP_KERNEL))) {
946 pr_info("%s: nullbuffer alloc failed\n", __func__);
947 goto clean_preallocate;
948 }
949 pr_debug("%s: null vaddr=%p dma=%#lx\n", __func__,
950 the_card.null_buffer_start_vaddr,
951 the_card.null_buffer_start_dma_addr);
952 /* set default sample rate/word width */
953 snd_ps3_init_avsetting(&the_card);
954
955 /* register the card */
956 snd_card_set_dev(the_card.card, &dev->core);
957 ret = snd_card_register(the_card.card);
958 if (ret < 0)
959 goto clean_dma_map;
960
961 pr_info("%s started. start_delay=%dms\n",
962 the_card.card->longname, the_card.start_delay);
963 return 0;
964
965 clean_dma_map:
966 dma_free_coherent(&the_card.ps3_dev->core,
967 PAGE_SIZE,
968 the_card.null_buffer_start_vaddr,
969 the_card.null_buffer_start_dma_addr);
970 clean_preallocate:
971 snd_pcm_lib_preallocate_free_for_all(the_card.pcm);
972 clean_card:
973 snd_card_free(the_card.card);
974 clean_irq:
975 snd_ps3_free_irq();
976 clean_dma_region:
977 ps3_dma_region_free(dev->d_region);
978 clean_mmio:
979 snd_ps3_unmap_mmio();
980 clean_dev_map:
981 lv1_gpu_device_unmap(2);
982 clean_open:
983 ps3_close_hv_device(dev);
984 /*
985 * there is no destructor function to pcm.
986 * midlayer automatically releases if the card removed
987 */
988 return ret;
989 }; /* snd_ps3_probe */
990
991 /* called when module removal */
992 static int snd_ps3_driver_remove(struct ps3_system_bus_device *dev)
993 {
994 int ret;
995 pr_info("%s:start id=%d\n", __func__, dev->match_id);
996 if (dev->match_id != PS3_MATCH_ID_SOUND)
997 return -ENXIO;
998
999 /*
1000 * ctl and preallocate buffer will be freed in
1001 * snd_card_free
1002 */
1003 ret = snd_card_free(the_card.card);
1004 if (ret)
1005 pr_info("%s: ctl freecard=%d\n", __func__, ret);
1006
1007 dma_free_coherent(&dev->core,
1008 PAGE_SIZE,
1009 the_card.null_buffer_start_vaddr,
1010 the_card.null_buffer_start_dma_addr);
1011
1012 ps3_dma_region_free(dev->d_region);
1013
1014 snd_ps3_free_irq();
1015 snd_ps3_unmap_mmio();
1016
1017 lv1_gpu_device_unmap(2);
1018 ps3_close_hv_device(dev);
1019 pr_info("%s:end id=%d\n", __func__, dev->match_id);
1020 return 0;
1021 } /* snd_ps3_remove */
1022
1023 static struct ps3_system_bus_driver snd_ps3_bus_driver_info = {
1024 .match_id = PS3_MATCH_ID_SOUND,
1025 .probe = snd_ps3_driver_probe,
1026 .remove = snd_ps3_driver_remove,
1027 .shutdown = snd_ps3_driver_remove,
1028 .core = {
1029 .name = SND_PS3_DRIVER_NAME,
1030 .owner = THIS_MODULE,
1031 },
1032 };
1033
1034
1035 /*
1036 * Interrupt handler
1037 */
1038 static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id)
1039 {
1040
1041 uint32_t port_intr;
1042 int underflow_occured = 0;
1043 struct snd_ps3_card_info *card = dev_id;
1044
1045 if (!card->running) {
1046 update_reg(PS3_AUDIO_AX_IS, 0);
1047 update_reg(PS3_AUDIO_INTR_0, 0);
1048 return IRQ_HANDLED;
1049 }
1050
1051 port_intr = read_reg(PS3_AUDIO_AX_IS);
1052 /*
1053 *serial buffer empty detected (every 4 times),
1054 *program next dma and kick it
1055 */
1056 if (port_intr & PS3_AUDIO_AX_IE_ASOBEIE(0)) {
1057 write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBEIE(0));
1058 if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
1059 write_reg(PS3_AUDIO_AX_IS, port_intr);
1060 underflow_occured = 1;
1061 }
1062 if (card->silent) {
1063 /* we are still in silent time */
1064 snd_ps3_program_dma(card,
1065 (underflow_occured) ?
1066 SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL :
1067 SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
1068 snd_ps3_kick_dma(card);
1069 card->silent --;
1070 } else {
1071 snd_ps3_program_dma(card,
1072 (underflow_occured) ?
1073 SND_PS3_DMA_FILLTYPE_FIRSTFILL :
1074 SND_PS3_DMA_FILLTYPE_RUNNING);
1075 snd_ps3_kick_dma(card);
1076 snd_pcm_period_elapsed(card->substream);
1077 }
1078 } else if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
1079 write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBUIE(0));
1080 /*
1081 * serial out underflow, but buffer empty not detected.
1082 * in this case, fill fifo with 0 to recover. After
1083 * filling dummy data, serial automatically start to
1084 * consume them and then will generate normal buffer
1085 * empty interrupts.
1086 * If both buffer underflow and buffer empty are occured,
1087 * it is better to do nomal data transfer than empty one
1088 */
1089 snd_ps3_program_dma(card,
1090 SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
1091 snd_ps3_kick_dma(card);
1092 snd_ps3_program_dma(card,
1093 SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
1094 snd_ps3_kick_dma(card);
1095 }
1096 /* clear interrupt cause */
1097 return IRQ_HANDLED;
1098 };
1099
1100 /*
1101 * module/subsystem initialize/terminate
1102 */
1103 static int __init snd_ps3_init(void)
1104 {
1105 int ret;
1106
1107 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
1108 return -ENXIO;
1109
1110 memset(&the_card, 0, sizeof(the_card));
1111 spin_lock_init(&the_card.dma_lock);
1112
1113 /* register systembus DRIVER, this calls our probe() func */
1114 ret = ps3_system_bus_driver_register(&snd_ps3_bus_driver_info);
1115
1116 return ret;
1117 }
1118
1119 static void __exit snd_ps3_exit(void)
1120 {
1121 ps3_system_bus_driver_unregister(&snd_ps3_bus_driver_info);
1122 }
1123
1124 MODULE_ALIAS(PS3_MODULE_ALIAS_SOUND);
Support for the Chinese Samsung S3C2440 based development boards