sound/pci/cs5535audio/cs5535audio_pcm.c

   1 /*
   2  * Driver for audio on multifunction CS5535 companion device
   3  * Copyright (C) Jaya Kumar
   4  *
   5  * Based on Jaroslav Kysela and Takashi Iwai's examples.
   6  * This work was sponsored by CIS(M) Sdn Bhd.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  * todo: add be fmt support, spdif, pm
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/pci.h>
  27 #include <sound/core.h>
  28 #include <sound/control.h>
  29 #include <sound/initval.h>
  30 #include <sound/asoundef.h>
  31 #include <sound/pcm.h>
  32 #include <sound/pcm_params.h>
  33 #include <sound/ac97_codec.h>
  34 #include "cs5535audio.h"
  35
  36 static struct snd_pcm_hardware snd_cs5535audio_playback =
  37 {
  38         .info =                 (
  39                                 SNDRV_PCM_INFO_MMAP |
  40                                 SNDRV_PCM_INFO_INTERLEAVED |
  41                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  42                                 SNDRV_PCM_INFO_MMAP_VALID |
  43                                 SNDRV_PCM_INFO_PAUSE |
  44                                 SNDRV_PCM_INFO_RESUME
  45                                 ),
  46         .formats =              (
  47                                 SNDRV_PCM_FMTBIT_S16_LE
  48                                 ),
  49         .rates =                (
  50                                 SNDRV_PCM_RATE_CONTINUOUS |
  51                                 SNDRV_PCM_RATE_8000_48000
  52                                 ),
  53         .rate_min =             4000,
  54         .rate_max =             48000,
  55         .channels_min =         2,
  56         .channels_max =         2,
  57         .buffer_bytes_max =     (128*1024),
  58         .period_bytes_min =     64,
  59         .period_bytes_max =     (64*1024 - 16),
  60         .periods_min =          1,
  61         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  62         .fifo_size =            0,
  63 };
  64
  65 static struct snd_pcm_hardware snd_cs5535audio_capture =
  66 {
  67         .info =                 (
  68                                 SNDRV_PCM_INFO_MMAP |
  69                                 SNDRV_PCM_INFO_INTERLEAVED |
  70                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  71                                 SNDRV_PCM_INFO_MMAP_VALID
  72                                 ),
  73         .formats =              (
  74                                 SNDRV_PCM_FMTBIT_S16_LE
  75                                 ),
  76         .rates =                (
  77                                 SNDRV_PCM_RATE_CONTINUOUS |
  78                                 SNDRV_PCM_RATE_8000_48000
  79                                 ),
  80         .rate_min =             4000,
  81         .rate_max =             48000,
  82         .channels_min =         2,
  83         .channels_max =         2,
  84         .buffer_bytes_max =     (128*1024),
  85         .period_bytes_min =     64,
  86         .period_bytes_max =     (64*1024 - 16),
  87         .periods_min =          1,
  88         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  89         .fifo_size =            0,
  90 };
  91
  92 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
  93 {
  94         int err;
  95         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
  96         struct snd_pcm_runtime *runtime = substream->runtime;
  97
  98         runtime->hw = snd_cs5535audio_playback;
  99         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
 100         snd_pcm_limit_hw_rates(runtime);
 101         cs5535au->playback_substream = substream;
 102         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
 103         if ((err = snd_pcm_hw_constraint_integer(runtime,
 104                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 105                 return err;
 106
 107         return 0;
 108 }
 109
 110 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
 111 {
 112         return 0;
 113 }
 114
 115 #define CS5535AUDIO_DESC_LIST_SIZE \
 116         PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
 117
 118 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
 119                                          struct cs5535audio_dma *dma,
 120                                          struct snd_pcm_substream *substream,
 121                                          unsigned int periods,
 122                                          unsigned int period_bytes)
 123 {
 124         unsigned int i;
 125         u32 addr, desc_addr, jmpprd_addr;
 126         struct cs5535audio_dma_desc *lastdesc;
 127
 128         if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
 129                 return -ENOMEM;
 130
 131         if (dma->desc_buf.area == NULL) {
 132                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
 133                                         snd_dma_pci_data(cs5535au->pci),
 134                                         CS5535AUDIO_DESC_LIST_SIZE+1,
 135                                         &dma->desc_buf) < 0)
 136                         return -ENOMEM;
 137                 dma->period_bytes = dma->periods = 0;
 138         }
 139
 140         if (dma->periods == periods && dma->period_bytes == period_bytes)
 141                 return 0;
 142
 143         /* the u32 cast is okay because in snd*create we successfully told
 144            pci alloc that we're only 32 bit capable so the uppper will be 0 */
 145         addr = (u32) substream->runtime->dma_addr;
 146         desc_addr = (u32) dma->desc_buf.addr;
 147         for (i = 0; i < periods; i++) {
 148                 struct cs5535audio_dma_desc *desc =
 149                         &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
 150                 desc->addr = cpu_to_le32(addr);
 151                 desc->size = cpu_to_le16(period_bytes);
 152                 desc->ctlreserved = cpu_to_le16(PRD_EOP);
 153                 desc_addr += sizeof(struct cs5535audio_dma_desc);
 154                 addr += period_bytes;
 155         }
 156         /* we reserved one dummy descriptor at the end to do the PRD jump */
 157         lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
 158         lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
 159         lastdesc->size = 0;
 160         lastdesc->ctlreserved = cpu_to_le16(PRD_JMP);
 161         jmpprd_addr = cpu_to_le32(lastdesc->addr +
 162                                   (sizeof(struct cs5535audio_dma_desc)*periods));
 163
 164         dma->substream = substream;
 165         dma->period_bytes = period_bytes;
 166         dma->periods = periods;
 167         spin_lock_irq(&cs5535au->reg_lock);
 168         dma->ops->disable_dma(cs5535au);
 169         dma->ops->setup_prd(cs5535au, jmpprd_addr);
 170         spin_unlock_irq(&cs5535au->reg_lock);
 171         return 0;
 172 }
 173
 174 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
 175 {
 176         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
 177 }
 178
 179 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
 180 {
 181         cs_writeb(cs5535au, ACC_BM0_CMD, 0);
 182 }
 183
 184 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
 185 {
 186         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
 187 }
 188
 189 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
 190                                            u32 prd_addr)
 191 {
 192         cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
 193 }
 194
 195 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
 196 {
 197         return cs_readl(cs5535au, ACC_BM0_PRD);
 198 }
 199
 200 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
 201 {
 202         return cs_readl(cs5535au, ACC_BM0_PNTR);
 203 }
 204
 205 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
 206 {
 207         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
 208 }
 209
 210 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
 211 {
 212         cs_writeb(cs5535au, ACC_BM1_CMD, 0);
 213 }
 214
 215 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
 216 {
 217         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
 218 }
 219
 220 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
 221                                           u32 prd_addr)
 222 {
 223         cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
 224 }
 225
 226 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
 227 {
 228         return cs_readl(cs5535au, ACC_BM1_PRD);
 229 }
 230
 231 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
 232 {
 233         return cs_readl(cs5535au, ACC_BM1_PNTR);
 234 }
 235
 236 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
 237                                           struct cs5535audio_dma *dma,
 238                                           struct snd_pcm_substream *substream)
 239 {
 240         snd_dma_free_pages(&dma->desc_buf);
 241         dma->desc_buf.area = NULL;
 242         dma->substream = NULL;
 243 }
 244
 245 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
 246                                      struct snd_pcm_hw_params *hw_params)
 247 {
 248         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 249         struct cs5535audio_dma *dma = substream->runtime->private_data;
 250         int err;
 251
 252         err = snd_pcm_lib_malloc_pages(substream,
 253                                         params_buffer_bytes(hw_params));
 254         if (err < 0)
 255                 return err;
 256         dma->buf_addr = substream->runtime->dma_addr;
 257         dma->buf_bytes = params_buffer_bytes(hw_params);
 258
 259         err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
 260                                             params_periods(hw_params),
 261                                             params_period_bytes(hw_params));
 262         if (!err)
 263                 dma->pcm_open_flag = 1;
 264
 265         return err;
 266 }
 267
 268 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
 269 {
 270         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 271         struct cs5535audio_dma *dma = substream->runtime->private_data;
 272
 273         if (dma->pcm_open_flag) {
 274                 if (substream == cs5535au->playback_substream)
 275                         snd_ac97_update_power(cs5535au->ac97,
 276                                         AC97_PCM_FRONT_DAC_RATE, 0);
 277                 else
 278                         snd_ac97_update_power(cs5535au->ac97,
 279                                         AC97_PCM_LR_ADC_RATE, 0);
 280                 dma->pcm_open_flag = 0;
 281         }
 282         cs5535audio_clear_dma_packets(cs5535au, dma, substream);
 283         return snd_pcm_lib_free_pages(substream);
 284 }
 285
 286 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
 287 {
 288         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 289         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
 290                                  substream->runtime->rate);
 291 }
 292
 293 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
 294 {
 295         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 296         struct cs5535audio_dma *dma = substream->runtime->private_data;
 297         int err = 0;
 298
 299         spin_lock(&cs5535au->reg_lock);
 300         switch (cmd) {
 301         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 302                 dma->ops->pause_dma(cs5535au);
 303                 break;
 304         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 305                 dma->ops->enable_dma(cs5535au);
 306                 break;
 307         case SNDRV_PCM_TRIGGER_START:
 308                 dma->ops->enable_dma(cs5535au);
 309                 break;
 310         case SNDRV_PCM_TRIGGER_RESUME:
 311                 dma->ops->enable_dma(cs5535au);
 312                 break;
 313         case SNDRV_PCM_TRIGGER_STOP:
 314                 dma->ops->disable_dma(cs5535au);
 315                 break;
 316         case SNDRV_PCM_TRIGGER_SUSPEND:
 317                 dma->ops->disable_dma(cs5535au);
 318                 break;
 319         default:
 320                 snd_printk(KERN_ERR "unhandled trigger\n");
 321                 err = -EINVAL;
 322                 break;
 323         }
 324         spin_unlock(&cs5535au->reg_lock);
 325         return err;
 326 }
 327
 328 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
 329                                                         *substream)
 330 {
 331         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 332         u32 curdma;
 333         struct cs5535audio_dma *dma;
 334
 335         dma = substream->runtime->private_data;
 336         curdma = dma->ops->read_dma_pntr(cs5535au);
 337         if (curdma < dma->buf_addr) {
 338                 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
 339                                         curdma, dma->buf_addr);
 340                 return 0;
 341         }
 342         curdma -= dma->buf_addr;
 343         if (curdma >= dma->buf_bytes) {
 344                 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
 345                                         curdma, dma->buf_bytes);
 346                 return 0;
 347         }
 348         return bytes_to_frames(substream->runtime, curdma);
 349 }
 350
 351 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
 352 {
 353         int err;
 354         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 355         struct snd_pcm_runtime *runtime = substream->runtime;
 356
 357         runtime->hw = snd_cs5535audio_capture;
 358         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
 359         snd_pcm_limit_hw_rates(runtime);
 360         cs5535au->capture_substream = substream;
 361         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
 362         if ((err = snd_pcm_hw_constraint_integer(runtime,
 363                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 364                 return err;
 365         olpc_capture_open(cs5535au->ac97);
 366         return 0;
 367 }
 368
 369 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
 370 {
 371         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 372         olpc_capture_close(cs5535au->ac97);
 373         return 0;
 374 }
 375
 376 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
 377 {
 378         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 379         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
 380                                  substream->runtime->rate);
 381 }
 382
 383 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
 384         .open =         snd_cs5535audio_playback_open,
 385         .close =        snd_cs5535audio_playback_close,
 386         .ioctl =        snd_pcm_lib_ioctl,
 387         .hw_params =    snd_cs5535audio_hw_params,
 388         .hw_free =      snd_cs5535audio_hw_free,
 389         .prepare =      snd_cs5535audio_playback_prepare,
 390         .trigger =      snd_cs5535audio_trigger,
 391         .pointer =      snd_cs5535audio_pcm_pointer,
 392 };
 393
 394 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
 395         .open =         snd_cs5535audio_capture_open,
 396         .close =        snd_cs5535audio_capture_close,
 397         .ioctl =        snd_pcm_lib_ioctl,
 398         .hw_params =    snd_cs5535audio_hw_params,
 399         .hw_free =      snd_cs5535audio_hw_free,
 400         .prepare =      snd_cs5535audio_capture_prepare,
 401         .trigger =      snd_cs5535audio_trigger,
 402         .pointer =      snd_cs5535audio_pcm_pointer,
 403 };
 404
 405 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
 406         .type = CS5535AUDIO_DMA_PLAYBACK,
 407         .enable_dma = cs5535audio_playback_enable_dma,
 408         .disable_dma = cs5535audio_playback_disable_dma,
 409         .setup_prd = cs5535audio_playback_setup_prd,
 410         .read_prd = cs5535audio_playback_read_prd,
 411         .pause_dma = cs5535audio_playback_pause_dma,
 412         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
 413 };
 414
 415 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
 416         .type = CS5535AUDIO_DMA_CAPTURE,
 417         .enable_dma = cs5535audio_capture_enable_dma,
 418         .disable_dma = cs5535audio_capture_disable_dma,
 419         .setup_prd = cs5535audio_capture_setup_prd,
 420         .read_prd = cs5535audio_capture_read_prd,
 421         .pause_dma = cs5535audio_capture_pause_dma,
 422         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
 423 };
 424
 425 int snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
 426 {
 427         struct snd_pcm *pcm;
 428         int err;
 429
 430         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
 431         if (err < 0)
 432                 return err;
 433
 434         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
 435                                         &snd_cs5535audio_playback_dma_ops;
 436         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
 437                                         &snd_cs5535audio_capture_dma_ops;
 438         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 439                                         &snd_cs5535audio_playback_ops);
 440         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 441                                         &snd_cs5535audio_capture_ops);
 442
 443         pcm->private_data = cs5535au;
 444         pcm->info_flags = 0;
 445         strcpy(pcm->name, "CS5535 Audio");
 446
 447         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 448                                         snd_dma_pci_data(cs5535au->pci),
 449                                         64*1024, 128*1024);
 450         cs5535au->pcm = pcm;
 451
 452         return 0;
 453 }
 454