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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Audio support for PS3
0004  * Copyright (C) 2007 Sony Computer Entertainment Inc.
0005  * All rights reserved.
0006  * Copyright 2006, 2007 Sony Corporation
0007  */
0008 
0009 #include <linux/dma-mapping.h>
0010 #include <linux/dmapool.h>
0011 #include <linux/gfp.h>
0012 #include <linux/init.h>
0013 #include <linux/interrupt.h>
0014 #include <linux/io.h>
0015 #include <linux/module.h>
0016 
0017 #include <sound/asound.h>
0018 #include <sound/control.h>
0019 #include <sound/core.h>
0020 #include <sound/initval.h>
0021 #include <sound/memalloc.h>
0022 #include <sound/pcm.h>
0023 #include <sound/pcm_params.h>
0024 
0025 #include <asm/dma.h>
0026 #include <asm/firmware.h>
0027 #include <asm/lv1call.h>
0028 #include <asm/ps3.h>
0029 #include <asm/ps3av.h>
0030 
0031 #include "snd_ps3.h"
0032 #include "snd_ps3_reg.h"
0033 
0034 
0035 /*
0036  * global
0037  */
0038 static struct snd_ps3_card_info the_card;
0039 
0040 static int snd_ps3_start_delay = CONFIG_SND_PS3_DEFAULT_START_DELAY;
0041 
0042 module_param_named(start_delay, snd_ps3_start_delay, uint, 0644);
0043 MODULE_PARM_DESC(start_delay, "time to insert silent data in ms");
0044 
0045 static int index = SNDRV_DEFAULT_IDX1;
0046 static char *id = SNDRV_DEFAULT_STR1;
0047 
0048 module_param(index, int, 0444);
0049 MODULE_PARM_DESC(index, "Index value for PS3 soundchip.");
0050 module_param(id, charp, 0444);
0051 MODULE_PARM_DESC(id, "ID string for PS3 soundchip.");
0052 
0053 
0054 /*
0055  * PS3 audio register access
0056  */
0057 static inline u32 read_reg(unsigned int reg)
0058 {
0059     return in_be32(the_card.mapped_mmio_vaddr + reg);
0060 }
0061 static inline void write_reg(unsigned int reg, u32 val)
0062 {
0063     out_be32(the_card.mapped_mmio_vaddr + reg, val);
0064 }
0065 static inline void update_reg(unsigned int reg, u32 or_val)
0066 {
0067     u32 newval = read_reg(reg) | or_val;
0068     write_reg(reg, newval);
0069 }
0070 static inline void update_mask_reg(unsigned int reg, u32 mask, u32 or_val)
0071 {
0072     u32 newval = (read_reg(reg) & mask) | or_val;
0073     write_reg(reg, newval);
0074 }
0075 
0076 /*
0077  * ALSA defs
0078  */
0079 static const struct snd_pcm_hardware snd_ps3_pcm_hw = {
0080     .info = (SNDRV_PCM_INFO_MMAP |
0081          SNDRV_PCM_INFO_NONINTERLEAVED |
0082          SNDRV_PCM_INFO_MMAP_VALID),
0083     .formats = (SNDRV_PCM_FMTBIT_S16_BE |
0084             SNDRV_PCM_FMTBIT_S24_BE),
0085     .rates = (SNDRV_PCM_RATE_44100 |
0086           SNDRV_PCM_RATE_48000 |
0087           SNDRV_PCM_RATE_88200 |
0088           SNDRV_PCM_RATE_96000),
0089     .rate_min = 44100,
0090     .rate_max = 96000,
0091 
0092     .channels_min = 2, /* stereo only */
0093     .channels_max = 2,
0094 
0095     .buffer_bytes_max = PS3_AUDIO_FIFO_SIZE * 64,
0096 
0097     /* interrupt by four stages */
0098     .period_bytes_min = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
0099     .period_bytes_max = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
0100 
0101     .periods_min = 16,
0102     .periods_max = 32, /* buffer_size_max/ period_bytes_max */
0103 
0104     .fifo_size = PS3_AUDIO_FIFO_SIZE
0105 };
0106 
0107 static int snd_ps3_verify_dma_stop(struct snd_ps3_card_info *card,
0108                    int count, int force_stop)
0109 {
0110     int dma_ch, done, retries, stop_forced = 0;
0111     uint32_t status;
0112 
0113     for (dma_ch = 0; dma_ch < 8; dma_ch++) {
0114         retries = count;
0115         do {
0116             status = read_reg(PS3_AUDIO_KICK(dma_ch)) &
0117                 PS3_AUDIO_KICK_STATUS_MASK;
0118             switch (status) {
0119             case PS3_AUDIO_KICK_STATUS_DONE:
0120             case PS3_AUDIO_KICK_STATUS_NOTIFY:
0121             case PS3_AUDIO_KICK_STATUS_CLEAR:
0122             case PS3_AUDIO_KICK_STATUS_ERROR:
0123                 done = 1;
0124                 break;
0125             default:
0126                 done = 0;
0127                 udelay(10);
0128             }
0129         } while (!done && --retries);
0130         if (!retries && force_stop) {
0131             pr_info("%s: DMA ch %d is not stopped.",
0132                 __func__, dma_ch);
0133             /* last resort. force to stop dma.
0134              *  NOTE: this cause DMA done interrupts
0135              */
0136             update_reg(PS3_AUDIO_CONFIG, PS3_AUDIO_CONFIG_CLEAR);
0137             stop_forced = 1;
0138         }
0139     }
0140     return stop_forced;
0141 }
0142 
0143 /*
0144  * wait for all dma is done.
0145  * NOTE: caller should reset card->running before call.
0146  *       If not, the interrupt handler will re-start DMA,
0147  *       then DMA is never stopped.
0148  */
0149 static void snd_ps3_wait_for_dma_stop(struct snd_ps3_card_info *card)
0150 {
0151     int stop_forced;
0152     /*
0153      * wait for the last dma is done
0154      */
0155 
0156     /*
0157      * expected maximum DMA done time is 5.7ms + something (DMA itself).
0158      * 5.7ms is from 16bit/sample 2ch 44.1Khz; the time next
0159      * DMA kick event would occur.
0160      */
0161     stop_forced = snd_ps3_verify_dma_stop(card, 700, 1);
0162 
0163     /*
0164      * clear outstanding interrupts.
0165      */
0166     update_reg(PS3_AUDIO_INTR_0, 0);
0167     update_reg(PS3_AUDIO_AX_IS, 0);
0168 
0169     /*
0170      *revert CLEAR bit since it will not reset automatically after DMA stop
0171      */
0172     if (stop_forced)
0173         update_mask_reg(PS3_AUDIO_CONFIG, ~PS3_AUDIO_CONFIG_CLEAR, 0);
0174     /* ensure the hardware sees changes */
0175     wmb();
0176 }
0177 
0178 static void snd_ps3_kick_dma(struct snd_ps3_card_info *card)
0179 {
0180 
0181     update_reg(PS3_AUDIO_KICK(0), PS3_AUDIO_KICK_REQUEST);
0182     /* ensure the hardware sees the change */
0183     wmb();
0184 }
0185 
0186 /*
0187  * convert virtual addr to ioif bus addr.
0188  */
0189 static dma_addr_t v_to_bus(struct snd_ps3_card_info *card, void *paddr, int ch)
0190 {
0191     return card->dma_start_bus_addr[ch] +
0192         (paddr - card->dma_start_vaddr[ch]);
0193 };
0194 
0195 
0196 /*
0197  * increment ring buffer pointer.
0198  * NOTE: caller must hold write spinlock
0199  */
0200 static void snd_ps3_bump_buffer(struct snd_ps3_card_info *card,
0201                 enum snd_ps3_ch ch, size_t byte_count,
0202                 int stage)
0203 {
0204     if (!stage)
0205         card->dma_last_transfer_vaddr[ch] =
0206             card->dma_next_transfer_vaddr[ch];
0207     card->dma_next_transfer_vaddr[ch] += byte_count;
0208     if ((card->dma_start_vaddr[ch] + (card->dma_buffer_size / 2)) <=
0209         card->dma_next_transfer_vaddr[ch]) {
0210         card->dma_next_transfer_vaddr[ch] = card->dma_start_vaddr[ch];
0211     }
0212 }
0213 /*
0214  * setup dmac to send data to audio and attenuate samples on the ring buffer
0215  */
0216 static int snd_ps3_program_dma(struct snd_ps3_card_info *card,
0217                    enum snd_ps3_dma_filltype filltype)
0218 {
0219     /* this dmac does not support over 4G */
0220     uint32_t dma_addr;
0221     int fill_stages, dma_ch, stage;
0222     enum snd_ps3_ch ch;
0223     uint32_t ch0_kick_event = 0; /* initialize to mute gcc */
0224     unsigned long irqsave;
0225     int silent = 0;
0226 
0227     switch (filltype) {
0228     case SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL:
0229         silent = 1;
0230         fallthrough;
0231     case SND_PS3_DMA_FILLTYPE_FIRSTFILL:
0232         ch0_kick_event = PS3_AUDIO_KICK_EVENT_ALWAYS;
0233         break;
0234 
0235     case SND_PS3_DMA_FILLTYPE_SILENT_RUNNING:
0236         silent = 1;
0237         fallthrough;
0238     case SND_PS3_DMA_FILLTYPE_RUNNING:
0239         ch0_kick_event = PS3_AUDIO_KICK_EVENT_SERIALOUT0_EMPTY;
0240         break;
0241     }
0242 
0243     snd_ps3_verify_dma_stop(card, 700, 0);
0244     fill_stages = 4;
0245     spin_lock_irqsave(&card->dma_lock, irqsave);
0246     for (ch = 0; ch < 2; ch++) {
0247         for (stage = 0; stage < fill_stages; stage++) {
0248             dma_ch = stage * 2 + ch;
0249             if (silent)
0250                 dma_addr = card->null_buffer_start_dma_addr;
0251             else
0252                 dma_addr =
0253                 v_to_bus(card,
0254                      card->dma_next_transfer_vaddr[ch],
0255                      ch);
0256 
0257             write_reg(PS3_AUDIO_SOURCE(dma_ch),
0258                   (PS3_AUDIO_SOURCE_TARGET_SYSTEM_MEMORY |
0259                    dma_addr));
0260 
0261             /* dst: fixed to 3wire#0 */
0262             if (ch == 0)
0263                 write_reg(PS3_AUDIO_DEST(dma_ch),
0264                       (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
0265                        PS3_AUDIO_AO_3W_LDATA(0)));
0266             else
0267                 write_reg(PS3_AUDIO_DEST(dma_ch),
0268                       (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
0269                        PS3_AUDIO_AO_3W_RDATA(0)));
0270 
0271             /* count always 1 DMA block (1/2 stage = 128 bytes) */
0272             write_reg(PS3_AUDIO_DMASIZE(dma_ch), 0);
0273             /* bump pointer if needed */
0274             if (!silent)
0275                 snd_ps3_bump_buffer(card, ch,
0276                             PS3_AUDIO_DMAC_BLOCK_SIZE,
0277                             stage);
0278 
0279             /* kick event  */
0280             if (dma_ch == 0)
0281                 write_reg(PS3_AUDIO_KICK(dma_ch),
0282                       ch0_kick_event);
0283             else
0284                 write_reg(PS3_AUDIO_KICK(dma_ch),
0285                       PS3_AUDIO_KICK_EVENT_AUDIO_DMA(dma_ch
0286                                      - 1) |
0287                       PS3_AUDIO_KICK_REQUEST);
0288         }
0289     }
0290     /* ensure the hardware sees the change */
0291     wmb();
0292     spin_unlock_irqrestore(&card->dma_lock, irqsave);
0293 
0294     return 0;
0295 }
0296 
0297 /*
0298  * Interrupt handler
0299  */
0300 static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id)
0301 {
0302 
0303     uint32_t port_intr;
0304     int underflow_occured = 0;
0305     struct snd_ps3_card_info *card = dev_id;
0306 
0307     if (!card->running) {
0308         update_reg(PS3_AUDIO_AX_IS, 0);
0309         update_reg(PS3_AUDIO_INTR_0, 0);
0310         return IRQ_HANDLED;
0311     }
0312 
0313     port_intr = read_reg(PS3_AUDIO_AX_IS);
0314     /*
0315      *serial buffer empty detected (every 4 times),
0316      *program next dma and kick it
0317      */
0318     if (port_intr & PS3_AUDIO_AX_IE_ASOBEIE(0)) {
0319         write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBEIE(0));
0320         if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
0321             write_reg(PS3_AUDIO_AX_IS, port_intr);
0322             underflow_occured = 1;
0323         }
0324         if (card->silent) {
0325             /* we are still in silent time */
0326             snd_ps3_program_dma(card,
0327                 (underflow_occured) ?
0328                 SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL :
0329                 SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
0330             snd_ps3_kick_dma(card);
0331             card->silent--;
0332         } else {
0333             snd_ps3_program_dma(card,
0334                 (underflow_occured) ?
0335                 SND_PS3_DMA_FILLTYPE_FIRSTFILL :
0336                 SND_PS3_DMA_FILLTYPE_RUNNING);
0337             snd_ps3_kick_dma(card);
0338             snd_pcm_period_elapsed(card->substream);
0339         }
0340     } else if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
0341         write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBUIE(0));
0342         /*
0343          * serial out underflow, but buffer empty not detected.
0344          * in this case, fill fifo with 0 to recover.  After
0345          * filling dummy data, serial automatically start to
0346          * consume them and then will generate normal buffer
0347          * empty interrupts.
0348          * If both buffer underflow and buffer empty are occurred,
0349          * it is better to do nomal data transfer than empty one
0350          */
0351         snd_ps3_program_dma(card,
0352                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
0353         snd_ps3_kick_dma(card);
0354         snd_ps3_program_dma(card,
0355                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
0356         snd_ps3_kick_dma(card);
0357     }
0358     /* clear interrupt cause */
0359     return IRQ_HANDLED;
0360 };
0361 
0362 /*
0363  * audio mute on/off
0364  * mute_on : 0 output enabled
0365  *           1 mute
0366  */
0367 static int snd_ps3_mute(int mute_on)
0368 {
0369     return ps3av_audio_mute(mute_on);
0370 }
0371 
0372 /*
0373  * av setting
0374  * NOTE: calling this function may generate audio interrupt.
0375  */
0376 static int snd_ps3_change_avsetting(struct snd_ps3_card_info *card)
0377 {
0378     int ret, retries, i;
0379     pr_debug("%s: start\n", __func__);
0380 
0381     ret = ps3av_set_audio_mode(card->avs.avs_audio_ch,
0382                   card->avs.avs_audio_rate,
0383                   card->avs.avs_audio_width,
0384                   card->avs.avs_audio_format,
0385                   card->avs.avs_audio_source);
0386     /*
0387      * Reset the following unwanted settings:
0388      */
0389 
0390     /* disable all 3wire buffers */
0391     update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
0392             ~(PS3_AUDIO_AO_3WMCTRL_ASOEN(0) |
0393               PS3_AUDIO_AO_3WMCTRL_ASOEN(1) |
0394               PS3_AUDIO_AO_3WMCTRL_ASOEN(2) |
0395               PS3_AUDIO_AO_3WMCTRL_ASOEN(3)),
0396             0);
0397     wmb();  /* ensure the hardware sees the change */
0398     /* wait for actually stopped */
0399     retries = 1000;
0400     while ((read_reg(PS3_AUDIO_AO_3WMCTRL) &
0401         (PS3_AUDIO_AO_3WMCTRL_ASORUN(0) |
0402          PS3_AUDIO_AO_3WMCTRL_ASORUN(1) |
0403          PS3_AUDIO_AO_3WMCTRL_ASORUN(2) |
0404          PS3_AUDIO_AO_3WMCTRL_ASORUN(3))) &&
0405            --retries) {
0406         udelay(1);
0407     }
0408 
0409     /* reset buffer pointer */
0410     for (i = 0; i < 4; i++) {
0411         update_reg(PS3_AUDIO_AO_3WCTRL(i),
0412                PS3_AUDIO_AO_3WCTRL_ASOBRST_RESET);
0413         udelay(10);
0414     }
0415     wmb(); /* ensure the hardware actually start resetting */
0416 
0417     /* enable 3wire#0 buffer */
0418     update_reg(PS3_AUDIO_AO_3WMCTRL, PS3_AUDIO_AO_3WMCTRL_ASOEN(0));
0419 
0420 
0421     /* In 24bit mode,ALSA inserts a zero byte at first byte of per sample */
0422     update_mask_reg(PS3_AUDIO_AO_3WCTRL(0),
0423             ~PS3_AUDIO_AO_3WCTRL_ASODF,
0424             PS3_AUDIO_AO_3WCTRL_ASODF_LSB);
0425     update_mask_reg(PS3_AUDIO_AO_SPDCTRL(0),
0426             ~PS3_AUDIO_AO_SPDCTRL_SPODF,
0427             PS3_AUDIO_AO_SPDCTRL_SPODF_LSB);
0428     /* ensure all the setting above is written back to register */
0429     wmb();
0430     /* avsetting driver altered AX_IE, caller must reset it if you want */
0431     pr_debug("%s: end\n", __func__);
0432     return ret;
0433 }
0434 
0435 /*
0436  *  set sampling rate according to the substream
0437  */
0438 static int snd_ps3_set_avsetting(struct snd_pcm_substream *substream)
0439 {
0440     struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
0441     struct snd_ps3_avsetting_info avs;
0442     int ret;
0443 
0444     avs = card->avs;
0445 
0446     pr_debug("%s: called freq=%d width=%d\n", __func__,
0447          substream->runtime->rate,
0448          snd_pcm_format_width(substream->runtime->format));
0449 
0450     pr_debug("%s: before freq=%d width=%d\n", __func__,
0451          card->avs.avs_audio_rate, card->avs.avs_audio_width);
0452 
0453     /* sample rate */
0454     switch (substream->runtime->rate) {
0455     case 44100:
0456         avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_44K;
0457         break;
0458     case 48000:
0459         avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
0460         break;
0461     case 88200:
0462         avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_88K;
0463         break;
0464     case 96000:
0465         avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_96K;
0466         break;
0467     default:
0468         pr_info("%s: invalid rate %d\n", __func__,
0469             substream->runtime->rate);
0470         return 1;
0471     }
0472 
0473     /* width */
0474     switch (snd_pcm_format_width(substream->runtime->format)) {
0475     case 16:
0476         avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
0477         break;
0478     case 24:
0479         avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_24;
0480         break;
0481     default:
0482         pr_info("%s: invalid width %d\n", __func__,
0483             snd_pcm_format_width(substream->runtime->format));
0484         return 1;
0485     }
0486 
0487     memcpy(avs.avs_cs_info, ps3av_mode_cs_info, 8);
0488 
0489     if (memcmp(&card->avs, &avs, sizeof(avs))) {
0490         pr_debug("%s: after freq=%d width=%d\n", __func__,
0491              card->avs.avs_audio_rate, card->avs.avs_audio_width);
0492 
0493         card->avs = avs;
0494         snd_ps3_change_avsetting(card);
0495         ret = 0;
0496     } else
0497         ret = 1;
0498 
0499     /* check CS non-audio bit and mute accordingly */
0500     if (avs.avs_cs_info[0] & 0x02)
0501         ps3av_audio_mute_analog(1); /* mute if non-audio */
0502     else
0503         ps3av_audio_mute_analog(0);
0504 
0505     return ret;
0506 }
0507 
0508 /*
0509  * PCM operators
0510  */
0511 static int snd_ps3_pcm_open(struct snd_pcm_substream *substream)
0512 {
0513     struct snd_pcm_runtime *runtime = substream->runtime;
0514     struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
0515 
0516     /* to retrieve substream/runtime in interrupt handler */
0517     card->substream = substream;
0518 
0519     runtime->hw = snd_ps3_pcm_hw;
0520 
0521     card->start_delay = snd_ps3_start_delay;
0522 
0523     /* mute off */
0524     snd_ps3_mute(0); /* this function sleep */
0525 
0526     snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
0527                    PS3_AUDIO_FIFO_STAGE_SIZE * 4 * 2);
0528     return 0;
0529 };
0530 
0531 static int snd_ps3_pcm_close(struct snd_pcm_substream *substream)
0532 {
0533     /* mute on */
0534     snd_ps3_mute(1);
0535     return 0;
0536 };
0537 
0538 static int snd_ps3_delay_to_bytes(struct snd_pcm_substream *substream,
0539                   unsigned int delay_ms)
0540 {
0541     int ret;
0542     int rate ;
0543 
0544     rate = substream->runtime->rate;
0545     ret = snd_pcm_format_size(substream->runtime->format,
0546                   rate * delay_ms / 1000)
0547         * substream->runtime->channels;
0548 
0549     pr_debug("%s: time=%d rate=%d bytes=%ld, frames=%d, ret=%d\n",
0550          __func__,
0551          delay_ms,
0552          rate,
0553          snd_pcm_format_size(substream->runtime->format, rate),
0554          rate * delay_ms / 1000,
0555          ret);
0556 
0557     return ret;
0558 };
0559 
0560 static int snd_ps3_pcm_prepare(struct snd_pcm_substream *substream)
0561 {
0562     struct snd_pcm_runtime *runtime = substream->runtime;
0563     struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
0564     unsigned long irqsave;
0565 
0566     if (!snd_ps3_set_avsetting(substream)) {
0567         /* some parameter changed */
0568         write_reg(PS3_AUDIO_AX_IE,
0569               PS3_AUDIO_AX_IE_ASOBEIE(0) |
0570               PS3_AUDIO_AX_IE_ASOBUIE(0));
0571         /*
0572          * let SPDIF device re-lock with SPDIF signal,
0573          * start with some silence
0574          */
0575         card->silent = snd_ps3_delay_to_bytes(substream,
0576                               card->start_delay) /
0577             (PS3_AUDIO_FIFO_STAGE_SIZE * 4); /* every 4 times */
0578     }
0579 
0580     /* restart ring buffer pointer */
0581     spin_lock_irqsave(&card->dma_lock, irqsave);
0582     {
0583         card->dma_buffer_size = runtime->dma_bytes;
0584 
0585         card->dma_last_transfer_vaddr[SND_PS3_CH_L] =
0586             card->dma_next_transfer_vaddr[SND_PS3_CH_L] =
0587             card->dma_start_vaddr[SND_PS3_CH_L] =
0588             runtime->dma_area;
0589         card->dma_start_bus_addr[SND_PS3_CH_L] = runtime->dma_addr;
0590 
0591         card->dma_last_transfer_vaddr[SND_PS3_CH_R] =
0592             card->dma_next_transfer_vaddr[SND_PS3_CH_R] =
0593             card->dma_start_vaddr[SND_PS3_CH_R] =
0594             runtime->dma_area + (runtime->dma_bytes / 2);
0595         card->dma_start_bus_addr[SND_PS3_CH_R] =
0596             runtime->dma_addr + (runtime->dma_bytes / 2);
0597 
0598         pr_debug("%s: vaddr=%p bus=%#llx\n", __func__,
0599              card->dma_start_vaddr[SND_PS3_CH_L],
0600              card->dma_start_bus_addr[SND_PS3_CH_L]);
0601 
0602     }
0603     spin_unlock_irqrestore(&card->dma_lock, irqsave);
0604 
0605     /* ensure the hardware sees the change */
0606     mb();
0607 
0608     return 0;
0609 };
0610 
0611 static int snd_ps3_pcm_trigger(struct snd_pcm_substream *substream,
0612                    int cmd)
0613 {
0614     struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
0615 
0616     switch (cmd) {
0617     case SNDRV_PCM_TRIGGER_START:
0618         /* clear outstanding interrupts  */
0619         update_reg(PS3_AUDIO_AX_IS, 0);
0620 
0621         spin_lock(&card->dma_lock);
0622         {
0623             card->running = 1;
0624         }
0625         spin_unlock(&card->dma_lock);
0626 
0627         snd_ps3_program_dma(card,
0628                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
0629         snd_ps3_kick_dma(card);
0630         while (read_reg(PS3_AUDIO_KICK(7)) &
0631                PS3_AUDIO_KICK_STATUS_MASK) {
0632             udelay(1);
0633         }
0634         snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
0635         snd_ps3_kick_dma(card);
0636         break;
0637 
0638     case SNDRV_PCM_TRIGGER_STOP:
0639         spin_lock(&card->dma_lock);
0640         {
0641             card->running = 0;
0642         }
0643         spin_unlock(&card->dma_lock);
0644         snd_ps3_wait_for_dma_stop(card);
0645         break;
0646     default:
0647         break;
0648 
0649     }
0650 
0651     return 0;
0652 };
0653 
0654 /*
0655  * report current pointer
0656  */
0657 static snd_pcm_uframes_t snd_ps3_pcm_pointer(
0658     struct snd_pcm_substream *substream)
0659 {
0660     struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
0661     size_t bytes;
0662     snd_pcm_uframes_t ret;
0663 
0664     spin_lock(&card->dma_lock);
0665     {
0666         bytes = (size_t)(card->dma_last_transfer_vaddr[SND_PS3_CH_L] -
0667                  card->dma_start_vaddr[SND_PS3_CH_L]);
0668     }
0669     spin_unlock(&card->dma_lock);
0670 
0671     ret = bytes_to_frames(substream->runtime, bytes * 2);
0672 
0673     return ret;
0674 };
0675 
0676 /*
0677  * SPDIF status bits controls
0678  */
0679 static int snd_ps3_spdif_mask_info(struct snd_kcontrol *kcontrol,
0680                    struct snd_ctl_elem_info *uinfo)
0681 {
0682     uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
0683     uinfo->count = 1;
0684     return 0;
0685 }
0686 
0687 /* FIXME: ps3av_set_audio_mode() assumes only consumer mode */
0688 static int snd_ps3_spdif_cmask_get(struct snd_kcontrol *kcontrol,
0689                    struct snd_ctl_elem_value *ucontrol)
0690 {
0691     memset(ucontrol->value.iec958.status, 0xff, 8);
0692     return 0;
0693 }
0694 
0695 static int snd_ps3_spdif_pmask_get(struct snd_kcontrol *kcontrol,
0696                    struct snd_ctl_elem_value *ucontrol)
0697 {
0698     return 0;
0699 }
0700 
0701 static int snd_ps3_spdif_default_get(struct snd_kcontrol *kcontrol,
0702                      struct snd_ctl_elem_value *ucontrol)
0703 {
0704     memcpy(ucontrol->value.iec958.status, ps3av_mode_cs_info, 8);
0705     return 0;
0706 }
0707 
0708 static int snd_ps3_spdif_default_put(struct snd_kcontrol *kcontrol,
0709                      struct snd_ctl_elem_value *ucontrol)
0710 {
0711     if (memcmp(ps3av_mode_cs_info, ucontrol->value.iec958.status, 8)) {
0712         memcpy(ps3av_mode_cs_info, ucontrol->value.iec958.status, 8);
0713         return 1;
0714     }
0715     return 0;
0716 }
0717 
0718 static const struct snd_kcontrol_new spdif_ctls[] = {
0719     {
0720         .access = SNDRV_CTL_ELEM_ACCESS_READ,
0721         .iface = SNDRV_CTL_ELEM_IFACE_PCM,
0722         .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
0723         .info = snd_ps3_spdif_mask_info,
0724         .get = snd_ps3_spdif_cmask_get,
0725     },
0726     {
0727         .access = SNDRV_CTL_ELEM_ACCESS_READ,
0728         .iface = SNDRV_CTL_ELEM_IFACE_PCM,
0729         .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PRO_MASK),
0730         .info = snd_ps3_spdif_mask_info,
0731         .get = snd_ps3_spdif_pmask_get,
0732     },
0733     {
0734         .iface = SNDRV_CTL_ELEM_IFACE_PCM,
0735         .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
0736         .info = snd_ps3_spdif_mask_info,
0737         .get = snd_ps3_spdif_default_get,
0738         .put = snd_ps3_spdif_default_put,
0739     },
0740 };
0741 
0742 static const struct snd_pcm_ops snd_ps3_pcm_spdif_ops = {
0743     .open = snd_ps3_pcm_open,
0744     .close = snd_ps3_pcm_close,
0745     .prepare = snd_ps3_pcm_prepare,
0746     .trigger = snd_ps3_pcm_trigger,
0747     .pointer = snd_ps3_pcm_pointer,
0748 };
0749 
0750 
0751 static int snd_ps3_map_mmio(void)
0752 {
0753     the_card.mapped_mmio_vaddr =
0754         ioremap(the_card.ps3_dev->m_region->bus_addr,
0755             the_card.ps3_dev->m_region->len);
0756 
0757     if (!the_card.mapped_mmio_vaddr) {
0758         pr_info("%s: ioremap 0 failed p=%#lx l=%#lx \n",
0759                __func__, the_card.ps3_dev->m_region->lpar_addr,
0760                the_card.ps3_dev->m_region->len);
0761         return -ENXIO;
0762     }
0763 
0764     return 0;
0765 };
0766 
0767 static void snd_ps3_unmap_mmio(void)
0768 {
0769     iounmap(the_card.mapped_mmio_vaddr);
0770     the_card.mapped_mmio_vaddr = NULL;
0771 }
0772 
0773 static int snd_ps3_allocate_irq(void)
0774 {
0775     int ret;
0776     u64 lpar_addr, lpar_size;
0777     u64 __iomem *mapped;
0778 
0779     /* FIXME: move this to device_init (H/W probe) */
0780 
0781     /* get irq outlet */
0782     ret = lv1_gpu_device_map(1, &lpar_addr, &lpar_size);
0783     if (ret) {
0784         pr_info("%s: device map 1 failed %d\n", __func__,
0785             ret);
0786         return -ENXIO;
0787     }
0788 
0789     mapped = ioremap(lpar_addr, lpar_size);
0790     if (!mapped) {
0791         pr_info("%s: ioremap 1 failed \n", __func__);
0792         return -ENXIO;
0793     }
0794 
0795     the_card.audio_irq_outlet = in_be64(mapped);
0796 
0797     iounmap(mapped);
0798     ret = lv1_gpu_device_unmap(1);
0799     if (ret)
0800         pr_info("%s: unmap 1 failed\n", __func__);
0801 
0802     /* irq */
0803     ret = ps3_irq_plug_setup(PS3_BINDING_CPU_ANY,
0804                  the_card.audio_irq_outlet,
0805                  &the_card.irq_no);
0806     if (ret) {
0807         pr_info("%s:ps3_alloc_irq failed (%d)\n", __func__, ret);
0808         return ret;
0809     }
0810 
0811     ret = request_irq(the_card.irq_no, snd_ps3_interrupt, 0,
0812               SND_PS3_DRIVER_NAME, &the_card);
0813     if (ret) {
0814         pr_info("%s: request_irq failed (%d)\n", __func__, ret);
0815         goto cleanup_irq;
0816     }
0817 
0818     return 0;
0819 
0820  cleanup_irq:
0821     ps3_irq_plug_destroy(the_card.irq_no);
0822     return ret;
0823 };
0824 
0825 static void snd_ps3_free_irq(void)
0826 {
0827     free_irq(the_card.irq_no, &the_card);
0828     ps3_irq_plug_destroy(the_card.irq_no);
0829 }
0830 
0831 static void snd_ps3_audio_set_base_addr(uint64_t ioaddr_start)
0832 {
0833     uint64_t val;
0834     int ret;
0835 
0836     val = (ioaddr_start & (0x0fUL << 32)) >> (32 - 20) |
0837         (0x03UL << 24) |
0838         (0x0fUL << 12) |
0839         (PS3_AUDIO_IOID);
0840 
0841     ret = lv1_gpu_attribute(0x100, 0x007, val);
0842     if (ret)
0843         pr_info("%s: gpu_attribute failed %d\n", __func__,
0844             ret);
0845 }
0846 
0847 static void snd_ps3_audio_fixup(struct snd_ps3_card_info *card)
0848 {
0849     /*
0850      * avsetting driver seems to never change the following
0851      * so, init them here once
0852      */
0853 
0854     /* no dma interrupt needed */
0855     write_reg(PS3_AUDIO_INTR_EN_0, 0);
0856 
0857     /* use every 4 buffer empty interrupt */
0858     update_mask_reg(PS3_AUDIO_AX_IC,
0859             PS3_AUDIO_AX_IC_AASOIMD_MASK,
0860             PS3_AUDIO_AX_IC_AASOIMD_EVERY4);
0861 
0862     /* enable 3wire clocks */
0863     update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
0864             ~(PS3_AUDIO_AO_3WMCTRL_ASOBCLKD_DISABLED |
0865               PS3_AUDIO_AO_3WMCTRL_ASOLRCKD_DISABLED),
0866             0);
0867     update_reg(PS3_AUDIO_AO_3WMCTRL,
0868            PS3_AUDIO_AO_3WMCTRL_ASOPLRCK_DEFAULT);
0869 }
0870 
0871 static int snd_ps3_init_avsetting(struct snd_ps3_card_info *card)
0872 {
0873     int ret;
0874     pr_debug("%s: start\n", __func__);
0875     card->avs.avs_audio_ch = PS3AV_CMD_AUDIO_NUM_OF_CH_2;
0876     card->avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
0877     card->avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
0878     card->avs.avs_audio_format = PS3AV_CMD_AUDIO_FORMAT_PCM;
0879     card->avs.avs_audio_source = PS3AV_CMD_AUDIO_SOURCE_SERIAL;
0880     memcpy(card->avs.avs_cs_info, ps3av_mode_cs_info, 8);
0881 
0882     ret = snd_ps3_change_avsetting(card);
0883 
0884     snd_ps3_audio_fixup(card);
0885 
0886     /* to start to generate SPDIF signal, fill data */
0887     snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
0888     snd_ps3_kick_dma(card);
0889     pr_debug("%s: end\n", __func__);
0890     return ret;
0891 }
0892 
0893 static int snd_ps3_driver_probe(struct ps3_system_bus_device *dev)
0894 {
0895     int i, ret;
0896     u64 lpar_addr, lpar_size;
0897     static u64 dummy_mask;
0898 
0899     the_card.ps3_dev = dev;
0900 
0901     ret = ps3_open_hv_device(dev);
0902 
0903     if (ret)
0904         return -ENXIO;
0905 
0906     /* setup MMIO */
0907     ret = lv1_gpu_device_map(2, &lpar_addr, &lpar_size);
0908     if (ret) {
0909         pr_info("%s: device map 2 failed %d\n", __func__, ret);
0910         goto clean_open;
0911     }
0912     ps3_mmio_region_init(dev, dev->m_region, lpar_addr, lpar_size,
0913         PAGE_SHIFT);
0914 
0915     ret = snd_ps3_map_mmio();
0916     if (ret)
0917         goto clean_dev_map;
0918 
0919     /* setup DMA area */
0920     ps3_dma_region_init(dev, dev->d_region,
0921                 PAGE_SHIFT, /* use system page size */
0922                 0, /* dma type; not used */
0923                 NULL,
0924                 ALIGN(SND_PS3_DMA_REGION_SIZE, PAGE_SIZE));
0925     dev->d_region->ioid = PS3_AUDIO_IOID;
0926 
0927     ret = ps3_dma_region_create(dev->d_region);
0928     if (ret) {
0929         pr_info("%s: region_create\n", __func__);
0930         goto clean_mmio;
0931     }
0932 
0933     dummy_mask = DMA_BIT_MASK(32);
0934     dev->core.dma_mask = &dummy_mask;
0935     dma_set_coherent_mask(&dev->core, dummy_mask);
0936 
0937     snd_ps3_audio_set_base_addr(dev->d_region->bus_addr);
0938 
0939     /* CONFIG_SND_PS3_DEFAULT_START_DELAY */
0940     the_card.start_delay = snd_ps3_start_delay;
0941 
0942     /* irq */
0943     if (snd_ps3_allocate_irq()) {
0944         ret = -ENXIO;
0945         goto clean_dma_region;
0946     }
0947 
0948     /* create card instance */
0949     ret = snd_card_new(&dev->core, index, id, THIS_MODULE,
0950                0, &the_card.card);
0951     if (ret < 0)
0952         goto clean_irq;
0953 
0954     strcpy(the_card.card->driver, "PS3");
0955     strcpy(the_card.card->shortname, "PS3");
0956     strcpy(the_card.card->longname, "PS3 sound");
0957 
0958     /* create control elements */
0959     for (i = 0; i < ARRAY_SIZE(spdif_ctls); i++) {
0960         ret = snd_ctl_add(the_card.card,
0961                   snd_ctl_new1(&spdif_ctls[i], &the_card));
0962         if (ret < 0)
0963             goto clean_card;
0964     }
0965 
0966     /* create PCM devices instance */
0967     /* NOTE:this driver works assuming pcm:substream = 1:1 */
0968     ret = snd_pcm_new(the_card.card,
0969               "SPDIF",
0970               0, /* instance index, will be stored pcm.device*/
0971               1, /* output substream */
0972               0, /* input substream */
0973               &(the_card.pcm));
0974     if (ret)
0975         goto clean_card;
0976 
0977     the_card.pcm->private_data = &the_card;
0978     strcpy(the_card.pcm->name, "SPDIF");
0979 
0980     /* set pcm ops */
0981     snd_pcm_set_ops(the_card.pcm, SNDRV_PCM_STREAM_PLAYBACK,
0982             &snd_ps3_pcm_spdif_ops);
0983 
0984     the_card.pcm->info_flags = SNDRV_PCM_INFO_NONINTERLEAVED;
0985     /* pre-alloc PCM DMA buffer*/
0986     snd_pcm_set_managed_buffer_all(the_card.pcm,
0987                        SNDRV_DMA_TYPE_DEV,
0988                        &dev->core,
0989                        SND_PS3_PCM_PREALLOC_SIZE,
0990                        SND_PS3_PCM_PREALLOC_SIZE);
0991 
0992     /*
0993      * allocate null buffer
0994      * its size should be lager than PS3_AUDIO_FIFO_STAGE_SIZE * 2
0995      * PAGE_SIZE is enogh
0996      */
0997     the_card.null_buffer_start_vaddr =
0998         dma_alloc_coherent(&the_card.ps3_dev->core,
0999                    PAGE_SIZE,
1000                    &the_card.null_buffer_start_dma_addr,
1001                    GFP_KERNEL);
1002     if (!the_card.null_buffer_start_vaddr) {
1003         pr_info("%s: nullbuffer alloc failed\n", __func__);
1004         ret = -ENOMEM;
1005         goto clean_card;
1006     }
1007     pr_debug("%s: null vaddr=%p dma=%#llx\n", __func__,
1008          the_card.null_buffer_start_vaddr,
1009          the_card.null_buffer_start_dma_addr);
1010     /* set default sample rate/word width */
1011     snd_ps3_init_avsetting(&the_card);
1012 
1013     /* register the card */
1014     ret = snd_card_register(the_card.card);
1015     if (ret < 0)
1016         goto clean_dma_map;
1017 
1018     pr_info("%s started. start_delay=%dms\n",
1019         the_card.card->longname, the_card.start_delay);
1020     return 0;
1021 
1022 clean_dma_map:
1023     dma_free_coherent(&the_card.ps3_dev->core,
1024               PAGE_SIZE,
1025               the_card.null_buffer_start_vaddr,
1026               the_card.null_buffer_start_dma_addr);
1027 clean_card:
1028     snd_card_free(the_card.card);
1029 clean_irq:
1030     snd_ps3_free_irq();
1031 clean_dma_region:
1032     ps3_dma_region_free(dev->d_region);
1033 clean_mmio:
1034     snd_ps3_unmap_mmio();
1035 clean_dev_map:
1036     lv1_gpu_device_unmap(2);
1037 clean_open:
1038     ps3_close_hv_device(dev);
1039     /*
1040      * there is no destructor function to pcm.
1041      * midlayer automatically releases if the card removed
1042      */
1043     return ret;
1044 }; /* snd_ps3_probe */
1045 
1046 /* called when module removal */
1047 static void snd_ps3_driver_remove(struct ps3_system_bus_device *dev)
1048 {
1049     int ret;
1050     pr_info("%s:start id=%d\n", __func__,  dev->match_id);
1051 
1052     /*
1053      * ctl and preallocate buffer will be freed in
1054      * snd_card_free
1055      */
1056     ret = snd_card_free(the_card.card);
1057     if (ret)
1058         pr_info("%s: ctl freecard=%d\n", __func__, ret);
1059 
1060     dma_free_coherent(&dev->core,
1061               PAGE_SIZE,
1062               the_card.null_buffer_start_vaddr,
1063               the_card.null_buffer_start_dma_addr);
1064 
1065     ps3_dma_region_free(dev->d_region);
1066 
1067     snd_ps3_free_irq();
1068     snd_ps3_unmap_mmio();
1069 
1070     lv1_gpu_device_unmap(2);
1071     ps3_close_hv_device(dev);
1072     pr_info("%s:end id=%d\n", __func__, dev->match_id);
1073 } /* snd_ps3_remove */
1074 
1075 static struct ps3_system_bus_driver snd_ps3_bus_driver_info = {
1076     .match_id = PS3_MATCH_ID_SOUND,
1077     .probe = snd_ps3_driver_probe,
1078     .remove = snd_ps3_driver_remove,
1079     .shutdown = snd_ps3_driver_remove,
1080     .core = {
1081         .name = SND_PS3_DRIVER_NAME,
1082         .owner = THIS_MODULE,
1083     },
1084 };
1085 
1086 
1087 /*
1088  * module/subsystem initialize/terminate
1089  */
1090 static int __init snd_ps3_init(void)
1091 {
1092     int ret;
1093 
1094     if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
1095         return -ENXIO;
1096 
1097     memset(&the_card, 0, sizeof(the_card));
1098     spin_lock_init(&the_card.dma_lock);
1099 
1100     /* register systembus DRIVER, this calls our probe() func */
1101     ret = ps3_system_bus_driver_register(&snd_ps3_bus_driver_info);
1102 
1103     return ret;
1104 }
1105 module_init(snd_ps3_init);
1106 
1107 static void __exit snd_ps3_exit(void)
1108 {
1109     ps3_system_bus_driver_unregister(&snd_ps3_bus_driver_info);
1110 }
1111 module_exit(snd_ps3_exit);
1112 
1113 MODULE_LICENSE("GPL v2");
1114 MODULE_DESCRIPTION("PS3 sound driver");
1115 MODULE_AUTHOR("Sony Computer Entertainment Inc.");
1116 MODULE_ALIAS(PS3_MODULE_ALIAS_SOUND);
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