sound/pci/cs5535audio/cs5535audio_pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for audio on multifunction CS5535 companion device
   4  * Copyright (C) Jaya Kumar
   5  *
   6  * Based on Jaroslav Kysela and Takashi Iwai's examples.
   7  * This work was sponsored by CIS(M) Sdn Bhd.
   8  *
   9  * todo: add be fmt support, spdif, pm
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/pci.h>
  14 #include <sound/core.h>
  15 #include <sound/control.h>
  16 #include <sound/initval.h>
  17 #include <sound/asoundef.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/ac97_codec.h>
  21 #include "cs5535audio.h"
  22
  23 static const struct snd_pcm_hardware snd_cs5535audio_playback =
  24 {
  25         .info =                 (
  26                                 SNDRV_PCM_INFO_MMAP |
  27                                 SNDRV_PCM_INFO_INTERLEAVED |
  28                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  29                                 SNDRV_PCM_INFO_MMAP_VALID |
  30                                 SNDRV_PCM_INFO_PAUSE |
  31                                 SNDRV_PCM_INFO_RESUME
  32                                 ),
  33         .formats =              (
  34                                 SNDRV_PCM_FMTBIT_S16_LE
  35                                 ),
  36         .rates =                (
  37                                 SNDRV_PCM_RATE_CONTINUOUS |
  38                                 SNDRV_PCM_RATE_8000_48000
  39                                 ),
  40         .rate_min =             4000,
  41         .rate_max =             48000,
  42         .channels_min =         2,
  43         .channels_max =         2,
  44         .buffer_bytes_max =     (128*1024),
  45         .period_bytes_min =     64,
  46         .period_bytes_max =     (64*1024 - 16),
  47         .periods_min =          1,
  48         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  49         .fifo_size =            0,
  50 };
  51
  52 static const struct snd_pcm_hardware snd_cs5535audio_capture =
  53 {
  54         .info =                 (
  55                                 SNDRV_PCM_INFO_MMAP |
  56                                 SNDRV_PCM_INFO_INTERLEAVED |
  57                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  58                                 SNDRV_PCM_INFO_MMAP_VALID
  59                                 ),
  60         .formats =              (
  61                                 SNDRV_PCM_FMTBIT_S16_LE
  62                                 ),
  63         .rates =                (
  64                                 SNDRV_PCM_RATE_CONTINUOUS |
  65                                 SNDRV_PCM_RATE_8000_48000
  66                                 ),
  67         .rate_min =             4000,
  68         .rate_max =             48000,
  69         .channels_min =         2,
  70         .channels_max =         2,
  71         .buffer_bytes_max =     (128*1024),
  72         .period_bytes_min =     64,
  73         .period_bytes_max =     (64*1024 - 16),
  74         .periods_min =          1,
  75         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  76         .fifo_size =            0,
  77 };
  78
  79 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
  80 {
  81         int err;
  82         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
  83         struct snd_pcm_runtime *runtime = substream->runtime;
  84
  85         runtime->hw = snd_cs5535audio_playback;
  86         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
  87         snd_pcm_limit_hw_rates(runtime);
  88         cs5535au->playback_substream = substream;
  89         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
  90         if ((err = snd_pcm_hw_constraint_integer(runtime,
  91                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
  92                 return err;
  93
  94         return 0;
  95 }
  96
  97 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
  98 {
  99         return 0;
 100 }
 101
 102 #define CS5535AUDIO_DESC_LIST_SIZE \
 103         PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
 104
 105 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
 106                                          struct cs5535audio_dma *dma,
 107                                          struct snd_pcm_substream *substream,
 108                                          unsigned int periods,
 109                                          unsigned int period_bytes)
 110 {
 111         unsigned int i;
 112         u32 addr, desc_addr, jmpprd_addr;
 113         struct cs5535audio_dma_desc *lastdesc;
 114
 115         if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
 116                 return -ENOMEM;
 117
 118         if (dma->desc_buf.area == NULL) {
 119                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
 120                                         &cs5535au->pci->dev,
 121                                         CS5535AUDIO_DESC_LIST_SIZE+1,
 122                                         &dma->desc_buf) < 0)
 123                         return -ENOMEM;
 124                 dma->period_bytes = dma->periods = 0;
 125         }
 126
 127         if (dma->periods == periods && dma->period_bytes == period_bytes)
 128                 return 0;
 129
 130         /* the u32 cast is okay because in snd*create we successfully told
 131            pci alloc that we're only 32 bit capable so the uppper will be 0 */
 132         addr = (u32) substream->runtime->dma_addr;
 133         desc_addr = (u32) dma->desc_buf.addr;
 134         for (i = 0; i < periods; i++) {
 135                 struct cs5535audio_dma_desc *desc =
 136                         &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
 137                 desc->addr = cpu_to_le32(addr);
 138                 desc->size = cpu_to_le16(period_bytes);
 139                 desc->ctlreserved = cpu_to_le16(PRD_EOP);
 140                 desc_addr += sizeof(struct cs5535audio_dma_desc);
 141                 addr += period_bytes;
 142         }
 143         /* we reserved one dummy descriptor at the end to do the PRD jump */
 144         lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
 145         lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
 146         lastdesc->size = 0;
 147         lastdesc->ctlreserved = cpu_to_le16(PRD_JMP);
 148         jmpprd_addr = (u32)dma->desc_buf.addr +
 149                 sizeof(struct cs5535audio_dma_desc) * periods;
 150
 151         dma->substream = substream;
 152         dma->period_bytes = period_bytes;
 153         dma->periods = periods;
 154         spin_lock_irq(&cs5535au->reg_lock);
 155         dma->ops->disable_dma(cs5535au);
 156         dma->ops->setup_prd(cs5535au, jmpprd_addr);
 157         spin_unlock_irq(&cs5535au->reg_lock);
 158         return 0;
 159 }
 160
 161 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
 162 {
 163         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
 164 }
 165
 166 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
 167 {
 168         cs_writeb(cs5535au, ACC_BM0_CMD, 0);
 169 }
 170
 171 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
 172 {
 173         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
 174 }
 175
 176 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
 177                                            u32 prd_addr)
 178 {
 179         cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
 180 }
 181
 182 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
 183 {
 184         return cs_readl(cs5535au, ACC_BM0_PRD);
 185 }
 186
 187 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
 188 {
 189         return cs_readl(cs5535au, ACC_BM0_PNTR);
 190 }
 191
 192 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
 193 {
 194         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
 195 }
 196
 197 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
 198 {
 199         cs_writeb(cs5535au, ACC_BM1_CMD, 0);
 200 }
 201
 202 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
 203 {
 204         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
 205 }
 206
 207 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
 208                                           u32 prd_addr)
 209 {
 210         cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
 211 }
 212
 213 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
 214 {
 215         return cs_readl(cs5535au, ACC_BM1_PRD);
 216 }
 217
 218 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
 219 {
 220         return cs_readl(cs5535au, ACC_BM1_PNTR);
 221 }
 222
 223 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
 224                                           struct cs5535audio_dma *dma,
 225                                           struct snd_pcm_substream *substream)
 226 {
 227         snd_dma_free_pages(&dma->desc_buf);
 228         dma->desc_buf.area = NULL;
 229         dma->substream = NULL;
 230 }
 231
 232 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
 233                                      struct snd_pcm_hw_params *hw_params)
 234 {
 235         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 236         struct cs5535audio_dma *dma = substream->runtime->private_data;
 237         int err;
 238
 239         dma->buf_addr = substream->runtime->dma_addr;
 240         dma->buf_bytes = params_buffer_bytes(hw_params);
 241
 242         err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
 243                                             params_periods(hw_params),
 244                                             params_period_bytes(hw_params));
 245         if (!err)
 246                 dma->pcm_open_flag = 1;
 247
 248         return err;
 249 }
 250
 251 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
 252 {
 253         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 254         struct cs5535audio_dma *dma = substream->runtime->private_data;
 255
 256         if (dma->pcm_open_flag) {
 257                 if (substream == cs5535au->playback_substream)
 258                         snd_ac97_update_power(cs5535au->ac97,
 259                                         AC97_PCM_FRONT_DAC_RATE, 0);
 260                 else
 261                         snd_ac97_update_power(cs5535au->ac97,
 262                                         AC97_PCM_LR_ADC_RATE, 0);
 263                 dma->pcm_open_flag = 0;
 264         }
 265         cs5535audio_clear_dma_packets(cs5535au, dma, substream);
 266         return 0;
 267 }
 268
 269 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
 270 {
 271         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 272         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
 273                                  substream->runtime->rate);
 274 }
 275
 276 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
 277 {
 278         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 279         struct cs5535audio_dma *dma = substream->runtime->private_data;
 280         int err = 0;
 281
 282         spin_lock(&cs5535au->reg_lock);
 283         switch (cmd) {
 284         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 285                 dma->ops->pause_dma(cs5535au);
 286                 break;
 287         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 288                 dma->ops->enable_dma(cs5535au);
 289                 break;
 290         case SNDRV_PCM_TRIGGER_START:
 291                 dma->ops->enable_dma(cs5535au);
 292                 break;
 293         case SNDRV_PCM_TRIGGER_RESUME:
 294                 dma->ops->enable_dma(cs5535au);
 295                 break;
 296         case SNDRV_PCM_TRIGGER_STOP:
 297                 dma->ops->disable_dma(cs5535au);
 298                 break;
 299         case SNDRV_PCM_TRIGGER_SUSPEND:
 300                 dma->ops->disable_dma(cs5535au);
 301                 break;
 302         default:
 303                 dev_err(cs5535au->card->dev, "unhandled trigger\n");
 304                 err = -EINVAL;
 305                 break;
 306         }
 307         spin_unlock(&cs5535au->reg_lock);
 308         return err;
 309 }
 310
 311 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
 312                                                         *substream)
 313 {
 314         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 315         u32 curdma;
 316         struct cs5535audio_dma *dma;
 317
 318         dma = substream->runtime->private_data;
 319         curdma = dma->ops->read_dma_pntr(cs5535au);
 320         if (curdma < dma->buf_addr) {
 321                 dev_err(cs5535au->card->dev, "curdma=%x < %x bufaddr.\n",
 322                                         curdma, dma->buf_addr);
 323                 return 0;
 324         }
 325         curdma -= dma->buf_addr;
 326         if (curdma >= dma->buf_bytes) {
 327                 dev_err(cs5535au->card->dev, "diff=%x >= %x buf_bytes.\n",
 328                                         curdma, dma->buf_bytes);
 329                 return 0;
 330         }
 331         return bytes_to_frames(substream->runtime, curdma);
 332 }
 333
 334 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
 335 {
 336         int err;
 337         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 338         struct snd_pcm_runtime *runtime = substream->runtime;
 339
 340         runtime->hw = snd_cs5535audio_capture;
 341         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
 342         snd_pcm_limit_hw_rates(runtime);
 343         cs5535au->capture_substream = substream;
 344         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
 345         if ((err = snd_pcm_hw_constraint_integer(runtime,
 346                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 347                 return err;
 348         olpc_capture_open(cs5535au->ac97);
 349         return 0;
 350 }
 351
 352 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
 353 {
 354         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 355         olpc_capture_close(cs5535au->ac97);
 356         return 0;
 357 }
 358
 359 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
 360 {
 361         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 362         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
 363                                  substream->runtime->rate);
 364 }
 365
 366 static const struct snd_pcm_ops snd_cs5535audio_playback_ops = {
 367         .open =         snd_cs5535audio_playback_open,
 368         .close =        snd_cs5535audio_playback_close,
 369         .hw_params =    snd_cs5535audio_hw_params,
 370         .hw_free =      snd_cs5535audio_hw_free,
 371         .prepare =      snd_cs5535audio_playback_prepare,
 372         .trigger =      snd_cs5535audio_trigger,
 373         .pointer =      snd_cs5535audio_pcm_pointer,
 374 };
 375
 376 static const struct snd_pcm_ops snd_cs5535audio_capture_ops = {
 377         .open =         snd_cs5535audio_capture_open,
 378         .close =        snd_cs5535audio_capture_close,
 379         .hw_params =    snd_cs5535audio_hw_params,
 380         .hw_free =      snd_cs5535audio_hw_free,
 381         .prepare =      snd_cs5535audio_capture_prepare,
 382         .trigger =      snd_cs5535audio_trigger,
 383         .pointer =      snd_cs5535audio_pcm_pointer,
 384 };
 385
 386 static const struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
 387         .type = CS5535AUDIO_DMA_PLAYBACK,
 388         .enable_dma = cs5535audio_playback_enable_dma,
 389         .disable_dma = cs5535audio_playback_disable_dma,
 390         .setup_prd = cs5535audio_playback_setup_prd,
 391         .read_prd = cs5535audio_playback_read_prd,
 392         .pause_dma = cs5535audio_playback_pause_dma,
 393         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
 394 };
 395
 396 static const struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
 397         .type = CS5535AUDIO_DMA_CAPTURE,
 398         .enable_dma = cs5535audio_capture_enable_dma,
 399         .disable_dma = cs5535audio_capture_disable_dma,
 400         .setup_prd = cs5535audio_capture_setup_prd,
 401         .read_prd = cs5535audio_capture_read_prd,
 402         .pause_dma = cs5535audio_capture_pause_dma,
 403         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
 404 };
 405
 406 int snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
 407 {
 408         struct snd_pcm *pcm;
 409         int err;
 410
 411         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
 412         if (err < 0)
 413                 return err;
 414
 415         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
 416                                         &snd_cs5535audio_playback_dma_ops;
 417         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
 418                                         &snd_cs5535audio_capture_dma_ops;
 419         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 420                                         &snd_cs5535audio_playback_ops);
 421         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 422                                         &snd_cs5535audio_capture_ops);
 423
 424         pcm->private_data = cs5535au;
 425         pcm->info_flags = 0;
 426         strcpy(pcm->name, "CS5535 Audio");
 427
 428         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
 429                                        &cs5535au->pci->dev,
 430                                        64*1024, 128*1024);
 431         cs5535au->pcm = pcm;
 432
 433         return 0;
 434 }
 435