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/slab.h>
  27 #include <linux/pci.h>
  28 #include <sound/core.h>
  29 #include <sound/control.h>
  30 #include <sound/initval.h>
  31 #include <sound/asoundef.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/ac97_codec.h>
  35 #include "cs5535audio.h"
  36
  37 static struct snd_pcm_hardware snd_cs5535audio_playback =
  38 {
  39         .info =                 (
  40                                 SNDRV_PCM_INFO_MMAP |
  41                                 SNDRV_PCM_INFO_INTERLEAVED |
  42                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  43                                 SNDRV_PCM_INFO_MMAP_VALID |
  44                                 SNDRV_PCM_INFO_PAUSE |
  45                                 SNDRV_PCM_INFO_RESUME
  46                                 ),
  47         .formats =              (
  48                                 SNDRV_PCM_FMTBIT_S16_LE
  49                                 ),
  50         .rates =                (
  51                                 SNDRV_PCM_RATE_CONTINUOUS |
  52                                 SNDRV_PCM_RATE_8000_48000
  53                                 ),
  54         .rate_min =             4000,
  55         .rate_max =             48000,
  56         .channels_min =         2,
  57         .channels_max =         2,
  58         .buffer_bytes_max =     (128*1024),
  59         .period_bytes_min =     64,
  60         .period_bytes_max =     (64*1024 - 16),
  61         .periods_min =          1,
  62         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  63         .fifo_size =            0,
  64 };
  65
  66 static struct snd_pcm_hardware snd_cs5535audio_capture =
  67 {
  68         .info =                 (
  69                                 SNDRV_PCM_INFO_MMAP |
  70                                 SNDRV_PCM_INFO_INTERLEAVED |
  71                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  72                                 SNDRV_PCM_INFO_MMAP_VALID
  73                                 ),
  74         .formats =              (
  75                                 SNDRV_PCM_FMTBIT_S16_LE
  76                                 ),
  77         .rates =                (
  78                                 SNDRV_PCM_RATE_CONTINUOUS |
  79                                 SNDRV_PCM_RATE_8000_48000
  80                                 ),
  81         .rate_min =             4000,
  82         .rate_max =             48000,
  83         .channels_min =         2,
  84         .channels_max =         2,
  85         .buffer_bytes_max =     (128*1024),
  86         .period_bytes_min =     64,
  87         .period_bytes_max =     (64*1024 - 16),
  88         .periods_min =          1,
  89         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  90         .fifo_size =            0,
  91 };
  92
  93 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
  94 {
  95         int err;
  96         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
  97         struct snd_pcm_runtime *runtime = substream->runtime;
  98
  99         runtime->hw = snd_cs5535audio_playback;
 100         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
 101         snd_pcm_limit_hw_rates(runtime);
 102         cs5535au->playback_substream = substream;
 103         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
 104         if ((err = snd_pcm_hw_constraint_integer(runtime,
 105                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 106                 return err;
 107
 108         return 0;
 109 }
 110
 111 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
 112 {
 113         return 0;
 114 }
 115
 116 #define CS5535AUDIO_DESC_LIST_SIZE \
 117         PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
 118
 119 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
 120                                          struct cs5535audio_dma *dma,
 121                                          struct snd_pcm_substream *substream,
 122                                          unsigned int periods,
 123                                          unsigned int period_bytes)
 124 {
 125         unsigned int i;
 126         u32 addr, desc_addr, jmpprd_addr;
 127         struct cs5535audio_dma_desc *lastdesc;
 128
 129         if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
 130                 return -ENOMEM;
 131
 132         if (dma->desc_buf.area == NULL) {
 133                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
 134                                         snd_dma_pci_data(cs5535au->pci),
 135                                         CS5535AUDIO_DESC_LIST_SIZE+1,
 136                                         &dma->desc_buf) < 0)
 137                         return -ENOMEM;
 138                 dma->period_bytes = dma->periods = 0;
 139         }
 140
 141         if (dma->periods == periods && dma->period_bytes == period_bytes)
 142                 return 0;
 143
 144         /* the u32 cast is okay because in snd*create we successfully told
 145            pci alloc that we're only 32 bit capable so the uppper will be 0 */
 146         addr = (u32) substream->runtime->dma_addr;
 147         desc_addr = (u32) dma->desc_buf.addr;
 148         for (i = 0; i < periods; i++) {
 149                 struct cs5535audio_dma_desc *desc =
 150                         &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
 151                 desc->addr = cpu_to_le32(addr);
 152                 desc->size = cpu_to_le32(period_bytes);
 153                 desc->ctlreserved = cpu_to_le32(PRD_EOP);
 154                 desc_addr += sizeof(struct cs5535audio_dma_desc);
 155                 addr += period_bytes;
 156         }
 157         /* we reserved one dummy descriptor at the end to do the PRD jump */
 158         lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
 159         lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
 160         lastdesc->size = 0;
 161         lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
 162         jmpprd_addr = cpu_to_le32(lastdesc->addr +
 163                                   (sizeof(struct cs5535audio_dma_desc)*periods));
 164
 165         dma->substream = substream;
 166         dma->period_bytes = period_bytes;
 167         dma->periods = periods;
 168         spin_lock_irq(&cs5535au->reg_lock);
 169         dma->ops->disable_dma(cs5535au);
 170         dma->ops->setup_prd(cs5535au, jmpprd_addr);
 171         spin_unlock_irq(&cs5535au->reg_lock);
 172         return 0;
 173 }
 174
 175 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
 176 {
 177         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
 178 }
 179
 180 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
 181 {
 182         cs_writeb(cs5535au, ACC_BM0_CMD, 0);
 183 }
 184
 185 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
 186 {
 187         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
 188 }
 189
 190 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
 191                                            u32 prd_addr)
 192 {
 193         cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
 194 }
 195
 196 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
 197 {
 198         return cs_readl(cs5535au, ACC_BM0_PRD);
 199 }
 200
 201 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
 202 {
 203         return cs_readl(cs5535au, ACC_BM0_PNTR);
 204 }
 205
 206 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
 207 {
 208         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
 209 }
 210
 211 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
 212 {
 213         cs_writeb(cs5535au, ACC_BM1_CMD, 0);
 214 }
 215
 216 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
 217 {
 218         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
 219 }
 220
 221 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
 222                                           u32 prd_addr)
 223 {
 224         cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
 225 }
 226
 227 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
 228 {
 229         return cs_readl(cs5535au, ACC_BM1_PRD);
 230 }
 231
 232 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
 233 {
 234         return cs_readl(cs5535au, ACC_BM1_PNTR);
 235 }
 236
 237 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
 238                                           struct cs5535audio_dma *dma,
 239                                           struct snd_pcm_substream *substream)
 240 {
 241         snd_dma_free_pages(&dma->desc_buf);
 242         dma->desc_buf.area = NULL;
 243         dma->substream = NULL;
 244 }
 245
 246 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
 247                                      struct snd_pcm_hw_params *hw_params)
 248 {
 249         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 250         struct cs5535audio_dma *dma = substream->runtime->private_data;
 251         int err;
 252
 253         err = snd_pcm_lib_malloc_pages(substream,
 254                                         params_buffer_bytes(hw_params));
 255         if (err < 0)
 256                 return err;
 257         dma->buf_addr = substream->runtime->dma_addr;
 258         dma->buf_bytes = params_buffer_bytes(hw_params);
 259
 260         err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
 261                                             params_periods(hw_params),
 262                                             params_period_bytes(hw_params));
 263         if (!err)
 264                 dma->pcm_open_flag = 1;
 265
 266         return err;
 267 }
 268
 269 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
 270 {
 271         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 272         struct cs5535audio_dma *dma = substream->runtime->private_data;
 273
 274         if (dma->pcm_open_flag) {
 275                 if (substream == cs5535au->playback_substream)
 276                         snd_ac97_update_power(cs5535au->ac97,
 277                                         AC97_PCM_FRONT_DAC_RATE, 0);
 278                 else
 279                         snd_ac97_update_power(cs5535au->ac97,
 280                                         AC97_PCM_LR_ADC_RATE, 0);
 281                 dma->pcm_open_flag = 0;
 282         }
 283         cs5535audio_clear_dma_packets(cs5535au, dma, substream);
 284         return snd_pcm_lib_free_pages(substream);
 285 }
 286
 287 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
 288 {
 289         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 290         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
 291                                  substream->runtime->rate);
 292 }
 293
 294 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
 295 {
 296         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 297         struct cs5535audio_dma *dma = substream->runtime->private_data;
 298         int err = 0;
 299
 300         spin_lock(&cs5535au->reg_lock);
 301         switch (cmd) {
 302         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 303                 dma->ops->pause_dma(cs5535au);
 304                 break;
 305         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 306                 dma->ops->enable_dma(cs5535au);
 307                 break;
 308         case SNDRV_PCM_TRIGGER_START:
 309                 dma->ops->enable_dma(cs5535au);
 310                 break;
 311         case SNDRV_PCM_TRIGGER_RESUME:
 312                 dma->ops->enable_dma(cs5535au);
 313                 break;
 314         case SNDRV_PCM_TRIGGER_STOP:
 315                 dma->ops->disable_dma(cs5535au);
 316                 break;
 317         case SNDRV_PCM_TRIGGER_SUSPEND:
 318                 dma->ops->disable_dma(cs5535au);
 319                 break;
 320         default:
 321                 snd_printk(KERN_ERR "unhandled trigger\n");
 322                 err = -EINVAL;
 323                 break;
 324         }
 325         spin_unlock(&cs5535au->reg_lock);
 326         return err;
 327 }
 328
 329 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
 330                                                         *substream)
 331 {
 332         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 333         u32 curdma;
 334         struct cs5535audio_dma *dma;
 335
 336         dma = substream->runtime->private_data;
 337         curdma = dma->ops->read_dma_pntr(cs5535au);
 338         if (curdma < dma->buf_addr) {
 339                 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
 340                                         curdma, dma->buf_addr);
 341                 return 0;
 342         }
 343         curdma -= dma->buf_addr;
 344         if (curdma >= dma->buf_bytes) {
 345                 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
 346                                         curdma, dma->buf_bytes);
 347                 return 0;
 348         }
 349         return bytes_to_frames(substream->runtime, curdma);
 350 }
 351
 352 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
 353 {
 354         int err;
 355         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 356         struct snd_pcm_runtime *runtime = substream->runtime;
 357
 358         runtime->hw = snd_cs5535audio_capture;
 359         runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
 360         snd_pcm_limit_hw_rates(runtime);
 361         cs5535au->capture_substream = substream;
 362         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
 363         if ((err = snd_pcm_hw_constraint_integer(runtime,
 364                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 365                 return err;
 366         olpc_capture_open(cs5535au->ac97);
 367         return 0;
 368 }
 369
 370 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
 371 {
 372         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 373         olpc_capture_close(cs5535au->ac97);
 374         return 0;
 375 }
 376
 377 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
 378 {
 379         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 380         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
 381                                  substream->runtime->rate);
 382 }
 383
 384 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
 385         .open =         snd_cs5535audio_playback_open,
 386         .close =        snd_cs5535audio_playback_close,
 387         .ioctl =        snd_pcm_lib_ioctl,
 388         .hw_params =    snd_cs5535audio_hw_params,
 389         .hw_free =      snd_cs5535audio_hw_free,
 390         .prepare =      snd_cs5535audio_playback_prepare,
 391         .trigger =      snd_cs5535audio_trigger,
 392         .pointer =      snd_cs5535audio_pcm_pointer,
 393 };
 394
 395 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
 396         .open =         snd_cs5535audio_capture_open,
 397         .close =        snd_cs5535audio_capture_close,
 398         .ioctl =        snd_pcm_lib_ioctl,
 399         .hw_params =    snd_cs5535audio_hw_params,
 400         .hw_free =      snd_cs5535audio_hw_free,
 401         .prepare =      snd_cs5535audio_capture_prepare,
 402         .trigger =      snd_cs5535audio_trigger,
 403         .pointer =      snd_cs5535audio_pcm_pointer,
 404 };
 405
 406 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
 407         .type = CS5535AUDIO_DMA_PLAYBACK,
 408         .enable_dma = cs5535audio_playback_enable_dma,
 409         .disable_dma = cs5535audio_playback_disable_dma,
 410         .setup_prd = cs5535audio_playback_setup_prd,
 411         .read_prd = cs5535audio_playback_read_prd,
 412         .pause_dma = cs5535audio_playback_pause_dma,
 413         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
 414 };
 415
 416 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
 417         .type = CS5535AUDIO_DMA_CAPTURE,
 418         .enable_dma = cs5535audio_capture_enable_dma,
 419         .disable_dma = cs5535audio_capture_disable_dma,
 420         .setup_prd = cs5535audio_capture_setup_prd,
 421         .read_prd = cs5535audio_capture_read_prd,
 422         .pause_dma = cs5535audio_capture_pause_dma,
 423         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
 424 };
 425
 426 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
 427 {
 428         struct snd_pcm *pcm;
 429         int err;
 430
 431         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
 432         if (err < 0)
 433                 return err;
 434
 435         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
 436                                         &snd_cs5535audio_playback_dma_ops;
 437         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
 438                                         &snd_cs5535audio_capture_dma_ops;
 439         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 440                                         &snd_cs5535audio_playback_ops);
 441         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 442                                         &snd_cs5535audio_capture_ops);
 443
 444         pcm->private_data = cs5535au;
 445         pcm->info_flags = 0;
 446         strcpy(pcm->name, "CS5535 Audio");
 447
 448         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 449                                         snd_dma_pci_data(cs5535au->pci),
 450                                         64*1024, 128*1024);
 451         cs5535au->pcm = pcm;
 452
 453         return 0;
 454 }
 455