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         err = snd_pcm_lib_malloc_pages(substream,
 240                                         params_buffer_bytes(hw_params));
 241         if (err < 0)
 242                 return err;
 243         dma->buf_addr = substream->runtime->dma_addr;
 244         dma->buf_bytes = params_buffer_bytes(hw_params);
 245
 246         err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
 247                                             params_periods(hw_params),
 248                                             params_period_bytes(hw_params));
 249         if (!err)
 250                 dma->pcm_open_flag = 1;
 251
 252         return err;
 253 }
 254
 255 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
 256 {
 257         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 258         struct cs5535audio_dma *dma = substream->runtime->private_data;
 259
 260         if (dma->pcm_open_flag) {
 261                 if (substream == cs5535au->playback_substream)
 262                         snd_ac97_update_power(cs5535au->ac97,
 263                                         AC97_PCM_FRONT_DAC_RATE, 0);
 264                 else
 265                         snd_ac97_update_power(cs5535au->ac97,
 266                                         AC97_PCM_LR_ADC_RATE, 0);
 267                 dma->pcm_open_flag = 0;
 268         }
 269         cs5535audio_clear_dma_packets(cs5535au, dma, substream);
 270         return snd_pcm_lib_free_pages(substream);
 271 }
 272
 273 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
 274 {
 275         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 276         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
 277                                  substream->runtime->rate);
 278 }
 279
 280 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
 281 {
 282         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 283         struct cs5535audio_dma *dma = substream->runtime->private_data;
 284         int err = 0;
 285
 286         spin_lock(&cs5535au->reg_lock);
 287         switch (cmd) {
 288         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 289                 dma->ops->pause_dma(cs5535au);
 290                 break;
 291         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 292                 dma->ops->enable_dma(cs5535au);
 293                 break;
 294         case SNDRV_PCM_TRIGGER_START:
 295                 dma->ops->enable_dma(cs5535au);
 296                 break;
 297         case SNDRV_PCM_TRIGGER_RESUME:
 298                 dma->ops->enable_dma(cs5535au);
 299                 break;
 300         case SNDRV_PCM_TRIGGER_STOP:
 301                 dma->ops->disable_dma(cs5535au);
 302                 break;
 303         case SNDRV_PCM_TRIGGER_SUSPEND:
 304                 dma->ops->disable_dma(cs5535au);
 305                 break;
 306         default:
 307                 dev_err(cs5535au->card->dev, "unhandled trigger\n");
 308                 err = -EINVAL;
 309                 break;
 310         }
 311         spin_unlock(&cs5535au->reg_lock);
 312         return err;
 313 }
 314
 315 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
 316                                                         *substream)
 317 {
 318         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 319         u32 curdma;
 320         struct cs5535audio_dma *dma;
 321
 322         dma = substream->runtime->private_data;
 323         curdma = dma->ops->read_dma_pntr(cs5535au);
 324         if (curdma < dma->buf_addr) {
 325                 dev_err(cs5535au->card->dev, "curdma=%x < %x bufaddr.\n",
 326                                         curdma, dma->buf_addr);
 327                 return 0;
 328         }
 329         curdma -= dma->buf_addr;
 330         if (curdma >= dma->buf_bytes) {
 331                 dev_err(cs5535au->card->dev, "diff=%x >= %x buf_bytes.\n",
 332                                         curdma, dma->buf_bytes);
 333                 return 0;
 334         }
 335         return bytes_to_frames(substream->runtime, curdma);
 336 }
 337
 338 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
 339 {
 340         int err;
 341         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 342         struct snd_pcm_runtime *runtime = substream->runtime;
 343
 344         runtime->hw = snd_cs5535audio_capture;
 345         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
 346         snd_pcm_limit_hw_rates(runtime);
 347         cs5535au->capture_substream = substream;
 348         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
 349         if ((err = snd_pcm_hw_constraint_integer(runtime,
 350                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 351                 return err;
 352         olpc_capture_open(cs5535au->ac97);
 353         return 0;
 354 }
 355
 356 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
 357 {
 358         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 359         olpc_capture_close(cs5535au->ac97);
 360         return 0;
 361 }
 362
 363 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
 364 {
 365         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 366         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
 367                                  substream->runtime->rate);
 368 }
 369
 370 static const struct snd_pcm_ops snd_cs5535audio_playback_ops = {
 371         .open =         snd_cs5535audio_playback_open,
 372         .close =        snd_cs5535audio_playback_close,
 373         .ioctl =        snd_pcm_lib_ioctl,
 374         .hw_params =    snd_cs5535audio_hw_params,
 375         .hw_free =      snd_cs5535audio_hw_free,
 376         .prepare =      snd_cs5535audio_playback_prepare,
 377         .trigger =      snd_cs5535audio_trigger,
 378         .pointer =      snd_cs5535audio_pcm_pointer,
 379 };
 380
 381 static const struct snd_pcm_ops snd_cs5535audio_capture_ops = {
 382         .open =         snd_cs5535audio_capture_open,
 383         .close =        snd_cs5535audio_capture_close,
 384         .ioctl =        snd_pcm_lib_ioctl,
 385         .hw_params =    snd_cs5535audio_hw_params,
 386         .hw_free =      snd_cs5535audio_hw_free,
 387         .prepare =      snd_cs5535audio_capture_prepare,
 388         .trigger =      snd_cs5535audio_trigger,
 389         .pointer =      snd_cs5535audio_pcm_pointer,
 390 };
 391
 392 static const struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
 393         .type = CS5535AUDIO_DMA_PLAYBACK,
 394         .enable_dma = cs5535audio_playback_enable_dma,
 395         .disable_dma = cs5535audio_playback_disable_dma,
 396         .setup_prd = cs5535audio_playback_setup_prd,
 397         .read_prd = cs5535audio_playback_read_prd,
 398         .pause_dma = cs5535audio_playback_pause_dma,
 399         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
 400 };
 401
 402 static const struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
 403         .type = CS5535AUDIO_DMA_CAPTURE,
 404         .enable_dma = cs5535audio_capture_enable_dma,
 405         .disable_dma = cs5535audio_capture_disable_dma,
 406         .setup_prd = cs5535audio_capture_setup_prd,
 407         .read_prd = cs5535audio_capture_read_prd,
 408         .pause_dma = cs5535audio_capture_pause_dma,
 409         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
 410 };
 411
 412 int snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
 413 {
 414         struct snd_pcm *pcm;
 415         int err;
 416
 417         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
 418         if (err < 0)
 419                 return err;
 420
 421         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
 422                                         &snd_cs5535audio_playback_dma_ops;
 423         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
 424                                         &snd_cs5535audio_capture_dma_ops;
 425         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 426                                         &snd_cs5535audio_playback_ops);
 427         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 428                                         &snd_cs5535audio_capture_ops);
 429
 430         pcm->private_data = cs5535au;
 431         pcm->info_flags = 0;
 432         strcpy(pcm->name, "CS5535 Audio");
 433
 434         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 435                                               &cs5535au->pci->dev,
 436                                               64*1024, 128*1024);
 437         cs5535au->pcm = pcm;
 438
 439         return 0;
 440 }
 441