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TOMOYO Linux Cross Reference
Linux/sound/ppc/snd_ps3.c

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  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/dma-mapping.h>
 22 #include <linux/dmapool.h>
 23 #include <linux/gfp.h>
 24 #include <linux/init.h>
 25 #include <linux/interrupt.h>
 26 #include <linux/io.h>
 27 #include <linux/module.h>
 28 
 29 #include <sound/asound.h>
 30 #include <sound/control.h>
 31 #include <sound/core.h>
 32 #include <sound/initval.h>
 33 #include <sound/memalloc.h>
 34 #include <sound/pcm.h>
 35 #include <sound/pcm_params.h>
 36 
 37 #include <asm/dma.h>
 38 #include <asm/firmware.h>
 39 #include <asm/lv1call.h>
 40 #include <asm/ps3.h>
 41 #include <asm/ps3av.h>
 42 
 43 #include "snd_ps3.h"
 44 #include "snd_ps3_reg.h"
 45 
 46 
 47 /*
 48  * global
 49  */
 50 static struct snd_ps3_card_info the_card;
 51 
 52 static int snd_ps3_start_delay = CONFIG_SND_PS3_DEFAULT_START_DELAY;
 53 
 54 module_param_named(start_delay, snd_ps3_start_delay, uint, 0644);
 55 MODULE_PARM_DESC(start_delay, "time to insert silent data in ms");
 56 
 57 static int index = SNDRV_DEFAULT_IDX1;
 58 static char *id = SNDRV_DEFAULT_STR1;
 59 
 60 module_param(index, int, 0444);
 61 MODULE_PARM_DESC(index, "Index value for PS3 soundchip.");
 62 module_param(id, charp, 0444);
 63 MODULE_PARM_DESC(id, "ID string for PS3 soundchip.");
 64 
 65 
 66 /*
 67  * PS3 audio register access
 68  */
 69 static inline u32 read_reg(unsigned int reg)
 70 {
 71         return in_be32(the_card.mapped_mmio_vaddr + reg);
 72 }
 73 static inline void write_reg(unsigned int reg, u32 val)
 74 {
 75         out_be32(the_card.mapped_mmio_vaddr + reg, val);
 76 }
 77 static inline void update_reg(unsigned int reg, u32 or_val)
 78 {
 79         u32 newval = read_reg(reg) | or_val;
 80         write_reg(reg, newval);
 81 }
 82 static inline void update_mask_reg(unsigned int reg, u32 mask, u32 or_val)
 83 {
 84         u32 newval = (read_reg(reg) & mask) | or_val;
 85         write_reg(reg, newval);
 86 }
 87 
 88 /*
 89  * ALSA defs
 90  */
 91 static const struct snd_pcm_hardware snd_ps3_pcm_hw = {
 92         .info = (SNDRV_PCM_INFO_MMAP |
 93                  SNDRV_PCM_INFO_NONINTERLEAVED |
 94                  SNDRV_PCM_INFO_MMAP_VALID),
 95         .formats = (SNDRV_PCM_FMTBIT_S16_BE |
 96                     SNDRV_PCM_FMTBIT_S24_BE),
 97         .rates = (SNDRV_PCM_RATE_44100 |
 98                   SNDRV_PCM_RATE_48000 |
 99                   SNDRV_PCM_RATE_88200 |
100                   SNDRV_PCM_RATE_96000),
101         .rate_min = 44100,
102         .rate_max = 96000,
103 
104         .channels_min = 2, /* stereo only */
105         .channels_max = 2,
106 
107         .buffer_bytes_max = PS3_AUDIO_FIFO_SIZE * 64,
108 
109         /* interrupt by four stages */
110         .period_bytes_min = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
111         .period_bytes_max = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
112 
113         .periods_min = 16,
114         .periods_max = 32, /* buffer_size_max/ period_bytes_max */
115 
116         .fifo_size = PS3_AUDIO_FIFO_SIZE
117 };
118 
119 static int snd_ps3_verify_dma_stop(struct snd_ps3_card_info *card,
120                                    int count, int force_stop)
121 {
122         int dma_ch, done, retries, stop_forced = 0;
123         uint32_t status;
124 
125         for (dma_ch = 0; dma_ch < 8; dma_ch++) {
126                 retries = count;
127                 do {
128                         status = read_reg(PS3_AUDIO_KICK(dma_ch)) &
129                                 PS3_AUDIO_KICK_STATUS_MASK;
130                         switch (status) {
131                         case PS3_AUDIO_KICK_STATUS_DONE:
132                         case PS3_AUDIO_KICK_STATUS_NOTIFY:
133                         case PS3_AUDIO_KICK_STATUS_CLEAR:
134                         case PS3_AUDIO_KICK_STATUS_ERROR:
135                                 done = 1;
136                                 break;
137                         default:
138                                 done = 0;
139                                 udelay(10);
140                         }
141                 } while (!done && --retries);
142                 if (!retries && force_stop) {
143                         pr_info("%s: DMA ch %d is not stopped.",
144                                 __func__, dma_ch);
145                         /* last resort. force to stop dma.
146                          *  NOTE: this cause DMA done interrupts
147                          */
148                         update_reg(PS3_AUDIO_CONFIG, PS3_AUDIO_CONFIG_CLEAR);
149                         stop_forced = 1;
150                 }
151         }
152         return stop_forced;
153 }
154 
155 /*
156  * wait for all dma is done.
157  * NOTE: caller should reset card->running before call.
158  *       If not, the interrupt handler will re-start DMA,
159  *       then DMA is never stopped.
160  */
161 static void snd_ps3_wait_for_dma_stop(struct snd_ps3_card_info *card)
162 {
163         int stop_forced;
164         /*
165          * wait for the last dma is done
166          */
167 
168         /*
169          * expected maximum DMA done time is 5.7ms + something (DMA itself).
170          * 5.7ms is from 16bit/sample 2ch 44.1Khz; the time next
171          * DMA kick event would occur.
172          */
173         stop_forced = snd_ps3_verify_dma_stop(card, 700, 1);
174 
175         /*
176          * clear outstanding interrupts.
177          */
178         update_reg(PS3_AUDIO_INTR_0, 0);
179         update_reg(PS3_AUDIO_AX_IS, 0);
180 
181         /*
182          *revert CLEAR bit since it will not reset automatically after DMA stop
183          */
184         if (stop_forced)
185                 update_mask_reg(PS3_AUDIO_CONFIG, ~PS3_AUDIO_CONFIG_CLEAR, 0);
186         /* ensure the hardware sees changes */
187         wmb();
188 }
189 
190 static void snd_ps3_kick_dma(struct snd_ps3_card_info *card)
191 {
192 
193         update_reg(PS3_AUDIO_KICK(0), PS3_AUDIO_KICK_REQUEST);
194         /* ensure the hardware sees the change */
195         wmb();
196 }
197 
198 /*
199  * convert virtual addr to ioif bus addr.
200  */
201 static dma_addr_t v_to_bus(struct snd_ps3_card_info *card, void *paddr, int ch)
202 {
203         return card->dma_start_bus_addr[ch] +
204                 (paddr - card->dma_start_vaddr[ch]);
205 };
206 
207 
208 /*
209  * increment ring buffer pointer.
210  * NOTE: caller must hold write spinlock
211  */
212 static void snd_ps3_bump_buffer(struct snd_ps3_card_info *card,
213                                 enum snd_ps3_ch ch, size_t byte_count,
214                                 int stage)
215 {
216         if (!stage)
217                 card->dma_last_transfer_vaddr[ch] =
218                         card->dma_next_transfer_vaddr[ch];
219         card->dma_next_transfer_vaddr[ch] += byte_count;
220         if ((card->dma_start_vaddr[ch] + (card->dma_buffer_size / 2)) <=
221             card->dma_next_transfer_vaddr[ch]) {
222                 card->dma_next_transfer_vaddr[ch] = card->dma_start_vaddr[ch];
223         }
224 }
225 /*
226  * setup dmac to send data to audio and attenuate samples on the ring buffer
227  */
228 static int snd_ps3_program_dma(struct snd_ps3_card_info *card,
229                                enum snd_ps3_dma_filltype filltype)
230 {
231         /* this dmac does not support over 4G */
232         uint32_t dma_addr;
233         int fill_stages, dma_ch, stage;
234         enum snd_ps3_ch ch;
235         uint32_t ch0_kick_event = 0; /* initialize to mute gcc */
236         void *start_vaddr;
237         unsigned long irqsave;
238         int silent = 0;
239 
240         switch (filltype) {
241         case SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL:
242                 silent = 1;
243                 /* intentionally fall thru */
244         case SND_PS3_DMA_FILLTYPE_FIRSTFILL:
245                 ch0_kick_event = PS3_AUDIO_KICK_EVENT_ALWAYS;
246                 break;
247 
248         case SND_PS3_DMA_FILLTYPE_SILENT_RUNNING:
249                 silent = 1;
250                 /* intentionally fall thru */
251         case SND_PS3_DMA_FILLTYPE_RUNNING:
252                 ch0_kick_event = PS3_AUDIO_KICK_EVENT_SERIALOUT0_EMPTY;
253                 break;
254         }
255 
256         snd_ps3_verify_dma_stop(card, 700, 0);
257         fill_stages = 4;
258         spin_lock_irqsave(&card->dma_lock, irqsave);
259         for (ch = 0; ch < 2; ch++) {
260                 start_vaddr = card->dma_next_transfer_vaddr[0];
261                 for (stage = 0; stage < fill_stages; stage++) {
262                         dma_ch = stage * 2 + ch;
263                         if (silent)
264                                 dma_addr = card->null_buffer_start_dma_addr;
265                         else
266                                 dma_addr =
267                                 v_to_bus(card,
268                                          card->dma_next_transfer_vaddr[ch],
269                                          ch);
270 
271                         write_reg(PS3_AUDIO_SOURCE(dma_ch),
272                                   (PS3_AUDIO_SOURCE_TARGET_SYSTEM_MEMORY |
273                                    dma_addr));
274 
275                         /* dst: fixed to 3wire#0 */
276                         if (ch == 0)
277                                 write_reg(PS3_AUDIO_DEST(dma_ch),
278                                           (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
279                                            PS3_AUDIO_AO_3W_LDATA(0)));
280                         else
281                                 write_reg(PS3_AUDIO_DEST(dma_ch),
282                                           (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
283                                            PS3_AUDIO_AO_3W_RDATA(0)));
284 
285                         /* count always 1 DMA block (1/2 stage = 128 bytes) */
286                         write_reg(PS3_AUDIO_DMASIZE(dma_ch), 0);
287                         /* bump pointer if needed */
288                         if (!silent)
289                                 snd_ps3_bump_buffer(card, ch,
290                                                     PS3_AUDIO_DMAC_BLOCK_SIZE,
291                                                     stage);
292 
293                         /* kick event  */
294                         if (dma_ch == 0)
295                                 write_reg(PS3_AUDIO_KICK(dma_ch),
296                                           ch0_kick_event);
297                         else
298                                 write_reg(PS3_AUDIO_KICK(dma_ch),
299                                           PS3_AUDIO_KICK_EVENT_AUDIO_DMA(dma_ch
300                                                                          - 1) |
301                                           PS3_AUDIO_KICK_REQUEST);
302                 }
303         }
304         /* ensure the hardware sees the change */
305         wmb();
306         spin_unlock_irqrestore(&card->dma_lock, irqsave);
307 
308         return 0;
309 }
310 
311 /*
312  * Interrupt handler
313  */
314 static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id)
315 {
316 
317         uint32_t port_intr;
318         int underflow_occured = 0;
319         struct snd_ps3_card_info *card = dev_id;
320 
321         if (!card->running) {
322                 update_reg(PS3_AUDIO_AX_IS, 0);
323                 update_reg(PS3_AUDIO_INTR_0, 0);
324                 return IRQ_HANDLED;
325         }
326 
327         port_intr = read_reg(PS3_AUDIO_AX_IS);
328         /*
329          *serial buffer empty detected (every 4 times),
330          *program next dma and kick it
331          */
332         if (port_intr & PS3_AUDIO_AX_IE_ASOBEIE(0)) {
333                 write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBEIE(0));
334                 if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
335                         write_reg(PS3_AUDIO_AX_IS, port_intr);
336                         underflow_occured = 1;
337                 }
338                 if (card->silent) {
339                         /* we are still in silent time */
340                         snd_ps3_program_dma(card,
341                                 (underflow_occured) ?
342                                 SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL :
343                                 SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
344                         snd_ps3_kick_dma(card);
345                         card->silent--;
346                 } else {
347                         snd_ps3_program_dma(card,
348                                 (underflow_occured) ?
349                                 SND_PS3_DMA_FILLTYPE_FIRSTFILL :
350                                 SND_PS3_DMA_FILLTYPE_RUNNING);
351                         snd_ps3_kick_dma(card);
352                         snd_pcm_period_elapsed(card->substream);
353                 }
354         } else if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
355                 write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBUIE(0));
356                 /*
357                  * serial out underflow, but buffer empty not detected.
358                  * in this case, fill fifo with 0 to recover.  After
359                  * filling dummy data, serial automatically start to
360                  * consume them and then will generate normal buffer
361                  * empty interrupts.
362                  * If both buffer underflow and buffer empty are occurred,
363                  * it is better to do nomal data transfer than empty one
364                  */
365                 snd_ps3_program_dma(card,
366                                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
367                 snd_ps3_kick_dma(card);
368                 snd_ps3_program_dma(card,
369                                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
370                 snd_ps3_kick_dma(card);
371         }
372         /* clear interrupt cause */
373         return IRQ_HANDLED;
374 };
375 
376 /*
377  * audio mute on/off
378  * mute_on : 0 output enabled
379  *           1 mute
380  */
381 static int snd_ps3_mute(int mute_on)
382 {
383         return ps3av_audio_mute(mute_on);
384 }
385 
386 /*
387  * av setting
388  * NOTE: calling this function may generate audio interrupt.
389  */
390 static int snd_ps3_change_avsetting(struct snd_ps3_card_info *card)
391 {
392         int ret, retries, i;
393         pr_debug("%s: start\n", __func__);
394 
395         ret = ps3av_set_audio_mode(card->avs.avs_audio_ch,
396                                   card->avs.avs_audio_rate,
397                                   card->avs.avs_audio_width,
398                                   card->avs.avs_audio_format,
399                                   card->avs.avs_audio_source);
400         /*
401          * Reset the following unwanted settings:
402          */
403 
404         /* disable all 3wire buffers */
405         update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
406                         ~(PS3_AUDIO_AO_3WMCTRL_ASOEN(0) |
407                           PS3_AUDIO_AO_3WMCTRL_ASOEN(1) |
408                           PS3_AUDIO_AO_3WMCTRL_ASOEN(2) |
409                           PS3_AUDIO_AO_3WMCTRL_ASOEN(3)),
410                         0);
411         wmb();  /* ensure the hardware sees the change */
412         /* wait for actually stopped */
413         retries = 1000;
414         while ((read_reg(PS3_AUDIO_AO_3WMCTRL) &
415                 (PS3_AUDIO_AO_3WMCTRL_ASORUN(0) |
416                  PS3_AUDIO_AO_3WMCTRL_ASORUN(1) |
417                  PS3_AUDIO_AO_3WMCTRL_ASORUN(2) |
418                  PS3_AUDIO_AO_3WMCTRL_ASORUN(3))) &&
419                --retries) {
420                 udelay(1);
421         }
422 
423         /* reset buffer pointer */
424         for (i = 0; i < 4; i++) {
425                 update_reg(PS3_AUDIO_AO_3WCTRL(i),
426                            PS3_AUDIO_AO_3WCTRL_ASOBRST_RESET);
427                 udelay(10);
428         }
429         wmb(); /* ensure the hardware actually start resetting */
430 
431         /* enable 3wire#0 buffer */
432         update_reg(PS3_AUDIO_AO_3WMCTRL, PS3_AUDIO_AO_3WMCTRL_ASOEN(0));
433 
434 
435         /* In 24bit mode,ALSA inserts a zero byte at first byte of per sample */
436         update_mask_reg(PS3_AUDIO_AO_3WCTRL(0),
437                         ~PS3_AUDIO_AO_3WCTRL_ASODF,
438                         PS3_AUDIO_AO_3WCTRL_ASODF_LSB);
439         update_mask_reg(PS3_AUDIO_AO_SPDCTRL(0),
440                         ~PS3_AUDIO_AO_SPDCTRL_SPODF,
441                         PS3_AUDIO_AO_SPDCTRL_SPODF_LSB);
442         /* ensure all the setting above is written back to register */
443         wmb();
444         /* avsetting driver altered AX_IE, caller must reset it if you want */
445         pr_debug("%s: end\n", __func__);
446         return ret;
447 }
448 
449 /*
450  *  set sampling rate according to the substream
451  */
452 static int snd_ps3_set_avsetting(struct snd_pcm_substream *substream)
453 {
454         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
455         struct snd_ps3_avsetting_info avs;
456         int ret;
457 
458         avs = card->avs;
459 
460         pr_debug("%s: called freq=%d width=%d\n", __func__,
461                  substream->runtime->rate,
462                  snd_pcm_format_width(substream->runtime->format));
463 
464         pr_debug("%s: before freq=%d width=%d\n", __func__,
465                  card->avs.avs_audio_rate, card->avs.avs_audio_width);
466 
467         /* sample rate */
468         switch (substream->runtime->rate) {
469         case 44100:
470                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_44K;
471                 break;
472         case 48000:
473                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
474                 break;
475         case 88200:
476                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_88K;
477                 break;
478         case 96000:
479                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_96K;
480                 break;
481         default:
482                 pr_info("%s: invalid rate %d\n", __func__,
483                         substream->runtime->rate);
484                 return 1;
485         }
486 
487         /* width */
488         switch (snd_pcm_format_width(substream->runtime->format)) {
489         case 16:
490                 avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
491                 break;
492         case 24:
493                 avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_24;
494                 break;
495         default:
496                 pr_info("%s: invalid width %d\n", __func__,
497                         snd_pcm_format_width(substream->runtime->format));
498                 return 1;
499         }
500 
501         memcpy(avs.avs_cs_info, ps3av_mode_cs_info, 8);
502 
503         if (memcmp(&card->avs, &avs, sizeof(avs))) {
504                 pr_debug("%s: after freq=%d width=%d\n", __func__,
505                          card->avs.avs_audio_rate, card->avs.avs_audio_width);
506 
507                 card->avs = avs;
508                 snd_ps3_change_avsetting(card);
509                 ret = 0;
510         } else
511                 ret = 1;
512 
513         /* check CS non-audio bit and mute accordingly */
514         if (avs.avs_cs_info[0] & 0x02)
515                 ps3av_audio_mute_analog(1); /* mute if non-audio */
516         else
517                 ps3av_audio_mute_analog(0);
518 
519         return ret;
520 }
521 
522 /*
523  * PCM operators
524  */
525 static int snd_ps3_pcm_open(struct snd_pcm_substream *substream)
526 {
527         struct snd_pcm_runtime *runtime = substream->runtime;
528         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
529         int pcm_index;
530 
531         pcm_index = substream->pcm->device;
532         /* to retrieve substream/runtime in interrupt handler */
533         card->substream = substream;
534 
535         runtime->hw = snd_ps3_pcm_hw;
536 
537         card->start_delay = snd_ps3_start_delay;
538 
539         /* mute off */
540         snd_ps3_mute(0); /* this function sleep */
541 
542         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
543                                    PS3_AUDIO_FIFO_STAGE_SIZE * 4 * 2);
544         return 0;
545 };
546 
547 static int snd_ps3_pcm_close(struct snd_pcm_substream *substream)
548 {
549         /* mute on */
550         snd_ps3_mute(1);
551         return 0;
552 };
553 
554 static int snd_ps3_pcm_hw_params(struct snd_pcm_substream *substream,
555                                  struct snd_pcm_hw_params *hw_params)
556 {
557         size_t size;
558 
559         /* alloc transport buffer */
560         size = params_buffer_bytes(hw_params);
561         snd_pcm_lib_malloc_pages(substream, size);
562         return 0;
563 };
564 
565 static int snd_ps3_pcm_hw_free(struct snd_pcm_substream *substream)
566 {
567         int ret;
568         ret = snd_pcm_lib_free_pages(substream);
569         return ret;
570 };
571 
572 static int snd_ps3_delay_to_bytes(struct snd_pcm_substream *substream,
573                                   unsigned int delay_ms)
574 {
575         int ret;
576         int rate ;
577 
578         rate = substream->runtime->rate;
579         ret = snd_pcm_format_size(substream->runtime->format,
580                                   rate * delay_ms / 1000)
581                 * substream->runtime->channels;
582 
583         pr_debug("%s: time=%d rate=%d bytes=%ld, frames=%d, ret=%d\n",
584                  __func__,
585                  delay_ms,
586                  rate,
587                  snd_pcm_format_size(substream->runtime->format, rate),
588                  rate * delay_ms / 1000,
589                  ret);
590 
591         return ret;
592 };
593 
594 static int snd_ps3_pcm_prepare(struct snd_pcm_substream *substream)
595 {
596         struct snd_pcm_runtime *runtime = substream->runtime;
597         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
598         unsigned long irqsave;
599 
600         if (!snd_ps3_set_avsetting(substream)) {
601                 /* some parameter changed */
602                 write_reg(PS3_AUDIO_AX_IE,
603                           PS3_AUDIO_AX_IE_ASOBEIE(0) |
604                           PS3_AUDIO_AX_IE_ASOBUIE(0));
605                 /*
606                  * let SPDIF device re-lock with SPDIF signal,
607                  * start with some silence
608                  */
609                 card->silent = snd_ps3_delay_to_bytes(substream,
610                                                       card->start_delay) /
611                         (PS3_AUDIO_FIFO_STAGE_SIZE * 4); /* every 4 times */
612         }
613 
614         /* restart ring buffer pointer */
615         spin_lock_irqsave(&card->dma_lock, irqsave);
616         {
617                 card->dma_buffer_size = runtime->dma_bytes;
618 
619                 card->dma_last_transfer_vaddr[SND_PS3_CH_L] =
620                         card->dma_next_transfer_vaddr[SND_PS3_CH_L] =
621                         card->dma_start_vaddr[SND_PS3_CH_L] =
622                         runtime->dma_area;
623                 card->dma_start_bus_addr[SND_PS3_CH_L] = runtime->dma_addr;
624 
625                 card->dma_last_transfer_vaddr[SND_PS3_CH_R] =
626                         card->dma_next_transfer_vaddr[SND_PS3_CH_R] =
627                         card->dma_start_vaddr[SND_PS3_CH_R] =
628                         runtime->dma_area + (runtime->dma_bytes / 2);
629                 card->dma_start_bus_addr[SND_PS3_CH_R] =
630                         runtime->dma_addr + (runtime->dma_bytes / 2);
631 
632                 pr_debug("%s: vaddr=%p bus=%#llx\n", __func__,
633                          card->dma_start_vaddr[SND_PS3_CH_L],
634                          card->dma_start_bus_addr[SND_PS3_CH_L]);
635 
636         }
637         spin_unlock_irqrestore(&card->dma_lock, irqsave);
638 
639         /* ensure the hardware sees the change */
640         mb();
641 
642         return 0;
643 };
644 
645 static int snd_ps3_pcm_trigger(struct snd_pcm_substream *substream,
646                                int cmd)
647 {
648         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
649         int ret = 0;
650 
651         switch (cmd) {
652         case SNDRV_PCM_TRIGGER_START:
653                 /* clear outstanding interrupts  */
654                 update_reg(PS3_AUDIO_AX_IS, 0);
655 
656                 spin_lock(&card->dma_lock);
657                 {
658                         card->running = 1;
659                 }
660                 spin_unlock(&card->dma_lock);
661 
662                 snd_ps3_program_dma(card,
663                                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
664                 snd_ps3_kick_dma(card);
665                 while (read_reg(PS3_AUDIO_KICK(7)) &
666                        PS3_AUDIO_KICK_STATUS_MASK) {
667                         udelay(1);
668                 }
669                 snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
670                 snd_ps3_kick_dma(card);
671                 break;
672 
673         case SNDRV_PCM_TRIGGER_STOP:
674                 spin_lock(&card->dma_lock);
675                 {
676                         card->running = 0;
677                 }
678                 spin_unlock(&card->dma_lock);
679                 snd_ps3_wait_for_dma_stop(card);
680                 break;
681         default:
682                 break;
683 
684         }
685 
686         return ret;
687 };
688 
689 /*
690  * report current pointer
691  */
692 static snd_pcm_uframes_t snd_ps3_pcm_pointer(
693         struct snd_pcm_substream *substream)
694 {
695         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
696         size_t bytes;
697         snd_pcm_uframes_t ret;
698 
699         spin_lock(&card->dma_lock);
700         {
701                 bytes = (size_t)(card->dma_last_transfer_vaddr[SND_PS3_CH_L] -
702                                  card->dma_start_vaddr[SND_PS3_CH_L]);
703         }
704         spin_unlock(&card->dma_lock);
705 
706         ret = bytes_to_frames(substream->runtime, bytes * 2);
707 
708         return ret;
709 };
710 
711 /*
712  * SPDIF status bits controls
713  */
714 static int snd_ps3_spdif_mask_info(struct snd_kcontrol *kcontrol,
715                                    struct snd_ctl_elem_info *uinfo)
716 {
717         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
718         uinfo->count = 1;
719         return 0;
720 }
721 
722 /* FIXME: ps3av_set_audio_mode() assumes only consumer mode */
723 static int snd_ps3_spdif_cmask_get(struct snd_kcontrol *kcontrol,
724                                    struct snd_ctl_elem_value *ucontrol)
725 {
726         memset(ucontrol->value.iec958.status, 0xff, 8);
727         return 0;
728 }
729 
730 static int snd_ps3_spdif_pmask_get(struct snd_kcontrol *kcontrol,
731                                    struct snd_ctl_elem_value *ucontrol)
732 {
733         return 0;
734 }
735 
736 static int snd_ps3_spdif_default_get(struct snd_kcontrol *kcontrol,
737                                      struct snd_ctl_elem_value *ucontrol)
738 {
739         memcpy(ucontrol->value.iec958.status, ps3av_mode_cs_info, 8);
740         return 0;
741 }
742 
743 static int snd_ps3_spdif_default_put(struct snd_kcontrol *kcontrol,
744                                      struct snd_ctl_elem_value *ucontrol)
745 {
746         if (memcmp(ps3av_mode_cs_info, ucontrol->value.iec958.status, 8)) {
747                 memcpy(ps3av_mode_cs_info, ucontrol->value.iec958.status, 8);
748                 return 1;
749         }
750         return 0;
751 }
752 
753 static struct snd_kcontrol_new spdif_ctls[] = {
754         {
755                 .access = SNDRV_CTL_ELEM_ACCESS_READ,
756                 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
757                 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
758                 .info = snd_ps3_spdif_mask_info,
759                 .get = snd_ps3_spdif_cmask_get,
760         },
761         {
762                 .access = SNDRV_CTL_ELEM_ACCESS_READ,
763                 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
764                 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PRO_MASK),
765                 .info = snd_ps3_spdif_mask_info,
766                 .get = snd_ps3_spdif_pmask_get,
767         },
768         {
769                 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
770                 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
771                 .info = snd_ps3_spdif_mask_info,
772                 .get = snd_ps3_spdif_default_get,
773                 .put = snd_ps3_spdif_default_put,
774         },
775 };
776 
777 static struct snd_pcm_ops snd_ps3_pcm_spdif_ops = {
778         .open = snd_ps3_pcm_open,
779         .close = snd_ps3_pcm_close,
780         .ioctl = snd_pcm_lib_ioctl,
781         .hw_params = snd_ps3_pcm_hw_params,
782         .hw_free = snd_ps3_pcm_hw_free,
783         .prepare = snd_ps3_pcm_prepare,
784         .trigger = snd_ps3_pcm_trigger,
785         .pointer = snd_ps3_pcm_pointer,
786 };
787 
788 
789 static int snd_ps3_map_mmio(void)
790 {
791         the_card.mapped_mmio_vaddr =
792                 ioremap(the_card.ps3_dev->m_region->bus_addr,
793                         the_card.ps3_dev->m_region->len);
794 
795         if (!the_card.mapped_mmio_vaddr) {
796                 pr_info("%s: ioremap 0 failed p=%#lx l=%#lx \n",
797                        __func__, the_card.ps3_dev->m_region->lpar_addr,
798                        the_card.ps3_dev->m_region->len);
799                 return -ENXIO;
800         }
801 
802         return 0;
803 };
804 
805 static void snd_ps3_unmap_mmio(void)
806 {
807         iounmap(the_card.mapped_mmio_vaddr);
808         the_card.mapped_mmio_vaddr = NULL;
809 }
810 
811 static int snd_ps3_allocate_irq(void)
812 {
813         int ret;
814         u64 lpar_addr, lpar_size;
815         u64 __iomem *mapped;
816 
817         /* FIXME: move this to device_init (H/W probe) */
818 
819         /* get irq outlet */
820         ret = lv1_gpu_device_map(1, &lpar_addr, &lpar_size);
821         if (ret) {
822                 pr_info("%s: device map 1 failed %d\n", __func__,
823                         ret);
824                 return -ENXIO;
825         }
826 
827         mapped = ioremap(lpar_addr, lpar_size);
828         if (!mapped) {
829                 pr_info("%s: ioremap 1 failed \n", __func__);
830                 return -ENXIO;
831         }
832 
833         the_card.audio_irq_outlet = in_be64(mapped);
834 
835         iounmap(mapped);
836         ret = lv1_gpu_device_unmap(1);
837         if (ret)
838                 pr_info("%s: unmap 1 failed\n", __func__);
839 
840         /* irq */
841         ret = ps3_irq_plug_setup(PS3_BINDING_CPU_ANY,
842                                  the_card.audio_irq_outlet,
843                                  &the_card.irq_no);
844         if (ret) {
845                 pr_info("%s:ps3_alloc_irq failed (%d)\n", __func__, ret);
846                 return ret;
847         }
848 
849         ret = request_irq(the_card.irq_no, snd_ps3_interrupt, 0,
850                           SND_PS3_DRIVER_NAME, &the_card);
851         if (ret) {
852                 pr_info("%s: request_irq failed (%d)\n", __func__, ret);
853                 goto cleanup_irq;
854         }
855 
856         return 0;
857 
858  cleanup_irq:
859         ps3_irq_plug_destroy(the_card.irq_no);
860         return ret;
861 };
862 
863 static void snd_ps3_free_irq(void)
864 {
865         free_irq(the_card.irq_no, &the_card);
866         ps3_irq_plug_destroy(the_card.irq_no);
867 }
868 
869 static void snd_ps3_audio_set_base_addr(uint64_t ioaddr_start)
870 {
871         uint64_t val;
872         int ret;
873 
874         val = (ioaddr_start & (0x0fUL << 32)) >> (32 - 20) |
875                 (0x03UL << 24) |
876                 (0x0fUL << 12) |
877                 (PS3_AUDIO_IOID);
878 
879         ret = lv1_gpu_attribute(0x100, 0x007, val);
880         if (ret)
881                 pr_info("%s: gpu_attribute failed %d\n", __func__,
882                         ret);
883 }
884 
885 static void snd_ps3_audio_fixup(struct snd_ps3_card_info *card)
886 {
887         /*
888          * avsetting driver seems to never change the followings
889          * so, init them here once
890          */
891 
892         /* no dma interrupt needed */
893         write_reg(PS3_AUDIO_INTR_EN_0, 0);
894 
895         /* use every 4 buffer empty interrupt */
896         update_mask_reg(PS3_AUDIO_AX_IC,
897                         PS3_AUDIO_AX_IC_AASOIMD_MASK,
898                         PS3_AUDIO_AX_IC_AASOIMD_EVERY4);
899 
900         /* enable 3wire clocks */
901         update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
902                         ~(PS3_AUDIO_AO_3WMCTRL_ASOBCLKD_DISABLED |
903                           PS3_AUDIO_AO_3WMCTRL_ASOLRCKD_DISABLED),
904                         0);
905         update_reg(PS3_AUDIO_AO_3WMCTRL,
906                    PS3_AUDIO_AO_3WMCTRL_ASOPLRCK_DEFAULT);
907 }
908 
909 static int snd_ps3_init_avsetting(struct snd_ps3_card_info *card)
910 {
911         int ret;
912         pr_debug("%s: start\n", __func__);
913         card->avs.avs_audio_ch = PS3AV_CMD_AUDIO_NUM_OF_CH_2;
914         card->avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
915         card->avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
916         card->avs.avs_audio_format = PS3AV_CMD_AUDIO_FORMAT_PCM;
917         card->avs.avs_audio_source = PS3AV_CMD_AUDIO_SOURCE_SERIAL;
918         memcpy(card->avs.avs_cs_info, ps3av_mode_cs_info, 8);
919 
920         ret = snd_ps3_change_avsetting(card);
921 
922         snd_ps3_audio_fixup(card);
923 
924         /* to start to generate SPDIF signal, fill data */
925         snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
926         snd_ps3_kick_dma(card);
927         pr_debug("%s: end\n", __func__);
928         return ret;
929 }
930 
931 static int snd_ps3_driver_probe(struct ps3_system_bus_device *dev)
932 {
933         int i, ret;
934         u64 lpar_addr, lpar_size;
935 
936         if (WARN_ON(!firmware_has_feature(FW_FEATURE_PS3_LV1)))
937                 return -ENODEV;
938         if (WARN_ON(dev->match_id != PS3_MATCH_ID_SOUND))
939                 return -ENODEV;
940 
941         the_card.ps3_dev = dev;
942 
943         ret = ps3_open_hv_device(dev);
944 
945         if (ret)
946                 return -ENXIO;
947 
948         /* setup MMIO */
949         ret = lv1_gpu_device_map(2, &lpar_addr, &lpar_size);
950         if (ret) {
951                 pr_info("%s: device map 2 failed %d\n", __func__, ret);
952                 goto clean_open;
953         }
954         ps3_mmio_region_init(dev, dev->m_region, lpar_addr, lpar_size,
955                 PAGE_SHIFT);
956 
957         ret = snd_ps3_map_mmio();
958         if (ret)
959                 goto clean_dev_map;
960 
961         /* setup DMA area */
962         ps3_dma_region_init(dev, dev->d_region,
963                             PAGE_SHIFT, /* use system page size */
964                             0, /* dma type; not used */
965                             NULL,
966                             _ALIGN_UP(SND_PS3_DMA_REGION_SIZE, PAGE_SIZE));
967         dev->d_region->ioid = PS3_AUDIO_IOID;
968 
969         ret = ps3_dma_region_create(dev->d_region);
970         if (ret) {
971                 pr_info("%s: region_create\n", __func__);
972                 goto clean_mmio;
973         }
974 
975         snd_ps3_audio_set_base_addr(dev->d_region->bus_addr);
976 
977         /* CONFIG_SND_PS3_DEFAULT_START_DELAY */
978         the_card.start_delay = snd_ps3_start_delay;
979 
980         /* irq */
981         if (snd_ps3_allocate_irq()) {
982                 ret = -ENXIO;
983                 goto clean_dma_region;
984         }
985 
986         /* create card instance */
987         ret = snd_card_new(&dev->core, index, id, THIS_MODULE,
988                            0, &the_card.card);
989         if (ret < 0)
990                 goto clean_irq;
991 
992         strcpy(the_card.card->driver, "PS3");
993         strcpy(the_card.card->shortname, "PS3");
994         strcpy(the_card.card->longname, "PS3 sound");
995 
996         /* create control elements */
997         for (i = 0; i < ARRAY_SIZE(spdif_ctls); i++) {
998                 ret = snd_ctl_add(the_card.card,
999                                   snd_ctl_new1(&spdif_ctls[i], &the_card));
1000                 if (ret < 0)
1001                         goto clean_card;
1002         }
1003 
1004         /* create PCM devices instance */
1005         /* NOTE:this driver works assuming pcm:substream = 1:1 */
1006         ret = snd_pcm_new(the_card.card,
1007                           "SPDIF",
1008                           0, /* instance index, will be stored pcm.device*/
1009                           1, /* output substream */
1010                           0, /* input substream */
1011                           &(the_card.pcm));
1012         if (ret)
1013                 goto clean_card;
1014 
1015         the_card.pcm->private_data = &the_card;
1016         strcpy(the_card.pcm->name, "SPDIF");
1017 
1018         /* set pcm ops */
1019         snd_pcm_set_ops(the_card.pcm, SNDRV_PCM_STREAM_PLAYBACK,
1020                         &snd_ps3_pcm_spdif_ops);
1021 
1022         the_card.pcm->info_flags = SNDRV_PCM_INFO_NONINTERLEAVED;
1023         /* pre-alloc PCM DMA buffer*/
1024         ret = snd_pcm_lib_preallocate_pages_for_all(the_card.pcm,
1025                                         SNDRV_DMA_TYPE_DEV,
1026                                         &dev->core,
1027                                         SND_PS3_PCM_PREALLOC_SIZE,
1028                                         SND_PS3_PCM_PREALLOC_SIZE);
1029         if (ret < 0) {
1030                 pr_info("%s: prealloc failed\n", __func__);
1031                 goto clean_card;
1032         }
1033 
1034         /*
1035          * allocate null buffer
1036          * its size should be lager than PS3_AUDIO_FIFO_STAGE_SIZE * 2
1037          * PAGE_SIZE is enogh
1038          */
1039         the_card.null_buffer_start_vaddr =
1040                 dma_alloc_coherent(&the_card.ps3_dev->core,
1041                                    PAGE_SIZE,
1042                                    &the_card.null_buffer_start_dma_addr,
1043                                    GFP_KERNEL);
1044         if (!the_card.null_buffer_start_vaddr) {
1045                 pr_info("%s: nullbuffer alloc failed\n", __func__);
1046                 ret = -ENOMEM;
1047                 goto clean_card;
1048         }
1049         pr_debug("%s: null vaddr=%p dma=%#llx\n", __func__,
1050                  the_card.null_buffer_start_vaddr,
1051                  the_card.null_buffer_start_dma_addr);
1052         /* set default sample rate/word width */
1053         snd_ps3_init_avsetting(&the_card);
1054 
1055         /* register the card */
1056         ret = snd_card_register(the_card.card);
1057         if (ret < 0)
1058                 goto clean_dma_map;
1059 
1060         pr_info("%s started. start_delay=%dms\n",
1061                 the_card.card->longname, the_card.start_delay);
1062         return 0;
1063 
1064 clean_dma_map:
1065         dma_free_coherent(&the_card.ps3_dev->core,
1066                           PAGE_SIZE,
1067                           the_card.null_buffer_start_vaddr,
1068                           the_card.null_buffer_start_dma_addr);
1069 clean_card:
1070         snd_card_free(the_card.card);
1071 clean_irq:
1072         snd_ps3_free_irq();
1073 clean_dma_region:
1074         ps3_dma_region_free(dev->d_region);
1075 clean_mmio:
1076         snd_ps3_unmap_mmio();
1077 clean_dev_map:
1078         lv1_gpu_device_unmap(2);
1079 clean_open:
1080         ps3_close_hv_device(dev);
1081         /*
1082          * there is no destructor function to pcm.
1083          * midlayer automatically releases if the card removed
1084          */
1085         return ret;
1086 }; /* snd_ps3_probe */
1087 
1088 /* called when module removal */
1089 static int snd_ps3_driver_remove(struct ps3_system_bus_device *dev)
1090 {
1091         int ret;
1092         pr_info("%s:start id=%d\n", __func__,  dev->match_id);
1093         if (dev->match_id != PS3_MATCH_ID_SOUND)
1094                 return -ENXIO;
1095 
1096         /*
1097          * ctl and preallocate buffer will be freed in
1098          * snd_card_free
1099          */
1100         ret = snd_card_free(the_card.card);
1101         if (ret)
1102                 pr_info("%s: ctl freecard=%d\n", __func__, ret);
1103 
1104         dma_free_coherent(&dev->core,
1105                           PAGE_SIZE,
1106                           the_card.null_buffer_start_vaddr,
1107                           the_card.null_buffer_start_dma_addr);
1108 
1109         ps3_dma_region_free(dev->d_region);
1110 
1111         snd_ps3_free_irq();
1112         snd_ps3_unmap_mmio();
1113 
1114         lv1_gpu_device_unmap(2);
1115         ps3_close_hv_device(dev);
1116         pr_info("%s:end id=%d\n", __func__, dev->match_id);
1117         return 0;
1118 } /* snd_ps3_remove */
1119 
1120 static struct ps3_system_bus_driver snd_ps3_bus_driver_info = {
1121         .match_id = PS3_MATCH_ID_SOUND,
1122         .probe = snd_ps3_driver_probe,
1123         .remove = snd_ps3_driver_remove,
1124         .shutdown = snd_ps3_driver_remove,
1125         .core = {
1126                 .name = SND_PS3_DRIVER_NAME,
1127                 .owner = THIS_MODULE,
1128         },
1129 };
1130 
1131 
1132 /*
1133  * module/subsystem initialize/terminate
1134  */
1135 static int __init snd_ps3_init(void)
1136 {
1137         int ret;
1138 
1139         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
1140                 return -ENXIO;
1141 
1142         memset(&the_card, 0, sizeof(the_card));
1143         spin_lock_init(&the_card.dma_lock);
1144 
1145         /* register systembus DRIVER, this calls our probe() func */
1146         ret = ps3_system_bus_driver_register(&snd_ps3_bus_driver_info);
1147 
1148         return ret;
1149 }
1150 module_init(snd_ps3_init);
1151 
1152 static void __exit snd_ps3_exit(void)
1153 {
1154         ps3_system_bus_driver_unregister(&snd_ps3_bus_driver_info);
1155 }
1156 module_exit(snd_ps3_exit);
1157 
1158 MODULE_LICENSE("GPL v2");
1159 MODULE_DESCRIPTION("PS3 sound driver");
1160 MODULE_AUTHOR("Sony Computer Entertainment Inc.");
1161 MODULE_ALIAS(PS3_MODULE_ALIAS_SOUND);
1162 

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