cs5535audio_pcm.c (12564B)
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 23static 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 52static 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 79static 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 err = snd_pcm_hw_constraint_integer(runtime, 91 SNDRV_PCM_HW_PARAM_PERIODS); 92 if (err < 0) 93 return err; 94 95 return 0; 96} 97 98static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream) 99{ 100 return 0; 101} 102 103#define CS5535AUDIO_DESC_LIST_SIZE \ 104 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc)) 105 106static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au, 107 struct cs5535audio_dma *dma, 108 struct snd_pcm_substream *substream, 109 unsigned int periods, 110 unsigned int period_bytes) 111{ 112 unsigned int i; 113 u32 addr, desc_addr, jmpprd_addr; 114 struct cs5535audio_dma_desc *lastdesc; 115 116 if (periods > CS5535AUDIO_MAX_DESCRIPTORS) 117 return -ENOMEM; 118 119 if (dma->desc_buf.area == NULL) { 120 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, 121 &cs5535au->pci->dev, 122 CS5535AUDIO_DESC_LIST_SIZE+1, 123 &dma->desc_buf) < 0) 124 return -ENOMEM; 125 dma->period_bytes = dma->periods = 0; 126 } 127 128 if (dma->periods == periods && dma->period_bytes == period_bytes) 129 return 0; 130 131 /* the u32 cast is okay because in snd*create we successfully told 132 pci alloc that we're only 32 bit capable so the upper will be 0 */ 133 addr = (u32) substream->runtime->dma_addr; 134 desc_addr = (u32) dma->desc_buf.addr; 135 for (i = 0; i < periods; i++) { 136 struct cs5535audio_dma_desc *desc = 137 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i]; 138 desc->addr = cpu_to_le32(addr); 139 desc->size = cpu_to_le16(period_bytes); 140 desc->ctlreserved = cpu_to_le16(PRD_EOP); 141 desc_addr += sizeof(struct cs5535audio_dma_desc); 142 addr += period_bytes; 143 } 144 /* we reserved one dummy descriptor at the end to do the PRD jump */ 145 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods]; 146 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr); 147 lastdesc->size = 0; 148 lastdesc->ctlreserved = cpu_to_le16(PRD_JMP); 149 jmpprd_addr = (u32)dma->desc_buf.addr + 150 sizeof(struct cs5535audio_dma_desc) * periods; 151 152 dma->substream = substream; 153 dma->period_bytes = period_bytes; 154 dma->periods = periods; 155 spin_lock_irq(&cs5535au->reg_lock); 156 dma->ops->disable_dma(cs5535au); 157 dma->ops->setup_prd(cs5535au, jmpprd_addr); 158 spin_unlock_irq(&cs5535au->reg_lock); 159 return 0; 160} 161 162static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au) 163{ 164 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN); 165} 166 167static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au) 168{ 169 cs_writeb(cs5535au, ACC_BM0_CMD, 0); 170} 171 172static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au) 173{ 174 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE); 175} 176 177static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au, 178 u32 prd_addr) 179{ 180 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr); 181} 182 183static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au) 184{ 185 return cs_readl(cs5535au, ACC_BM0_PRD); 186} 187 188static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au) 189{ 190 return cs_readl(cs5535au, ACC_BM0_PNTR); 191} 192 193static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au) 194{ 195 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN); 196} 197 198static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au) 199{ 200 cs_writeb(cs5535au, ACC_BM1_CMD, 0); 201} 202 203static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au) 204{ 205 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE); 206} 207 208static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au, 209 u32 prd_addr) 210{ 211 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr); 212} 213 214static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au) 215{ 216 return cs_readl(cs5535au, ACC_BM1_PRD); 217} 218 219static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au) 220{ 221 return cs_readl(cs5535au, ACC_BM1_PNTR); 222} 223 224static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au, 225 struct cs5535audio_dma *dma, 226 struct snd_pcm_substream *substream) 227{ 228 snd_dma_free_pages(&dma->desc_buf); 229 dma->desc_buf.area = NULL; 230 dma->substream = NULL; 231} 232 233static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream, 234 struct snd_pcm_hw_params *hw_params) 235{ 236 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 237 struct cs5535audio_dma *dma = substream->runtime->private_data; 238 int err; 239 240 dma->buf_addr = substream->runtime->dma_addr; 241 dma->buf_bytes = params_buffer_bytes(hw_params); 242 243 err = cs5535audio_build_dma_packets(cs5535au, dma, substream, 244 params_periods(hw_params), 245 params_period_bytes(hw_params)); 246 if (!err) 247 dma->pcm_open_flag = 1; 248 249 return err; 250} 251 252static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream) 253{ 254 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 255 struct cs5535audio_dma *dma = substream->runtime->private_data; 256 257 if (dma->pcm_open_flag) { 258 if (substream == cs5535au->playback_substream) 259 snd_ac97_update_power(cs5535au->ac97, 260 AC97_PCM_FRONT_DAC_RATE, 0); 261 else 262 snd_ac97_update_power(cs5535au->ac97, 263 AC97_PCM_LR_ADC_RATE, 0); 264 dma->pcm_open_flag = 0; 265 } 266 cs5535audio_clear_dma_packets(cs5535au, dma, substream); 267 return 0; 268} 269 270static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream) 271{ 272 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 273 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE, 274 substream->runtime->rate); 275} 276 277static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd) 278{ 279 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 280 struct cs5535audio_dma *dma = substream->runtime->private_data; 281 int err = 0; 282 283 spin_lock(&cs5535au->reg_lock); 284 switch (cmd) { 285 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 286 dma->ops->pause_dma(cs5535au); 287 break; 288 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 289 dma->ops->enable_dma(cs5535au); 290 break; 291 case SNDRV_PCM_TRIGGER_START: 292 dma->ops->enable_dma(cs5535au); 293 break; 294 case SNDRV_PCM_TRIGGER_RESUME: 295 dma->ops->enable_dma(cs5535au); 296 break; 297 case SNDRV_PCM_TRIGGER_STOP: 298 dma->ops->disable_dma(cs5535au); 299 break; 300 case SNDRV_PCM_TRIGGER_SUSPEND: 301 dma->ops->disable_dma(cs5535au); 302 break; 303 default: 304 dev_err(cs5535au->card->dev, "unhandled trigger\n"); 305 err = -EINVAL; 306 break; 307 } 308 spin_unlock(&cs5535au->reg_lock); 309 return err; 310} 311 312static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream 313 *substream) 314{ 315 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 316 u32 curdma; 317 struct cs5535audio_dma *dma; 318 319 dma = substream->runtime->private_data; 320 curdma = dma->ops->read_dma_pntr(cs5535au); 321 if (curdma < dma->buf_addr) { 322 dev_err(cs5535au->card->dev, "curdma=%x < %x bufaddr.\n", 323 curdma, dma->buf_addr); 324 return 0; 325 } 326 curdma -= dma->buf_addr; 327 if (curdma >= dma->buf_bytes) { 328 dev_err(cs5535au->card->dev, "diff=%x >= %x buf_bytes.\n", 329 curdma, dma->buf_bytes); 330 return 0; 331 } 332 return bytes_to_frames(substream->runtime, curdma); 333} 334 335static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream) 336{ 337 int err; 338 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 339 struct snd_pcm_runtime *runtime = substream->runtime; 340 341 runtime->hw = snd_cs5535audio_capture; 342 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC]; 343 snd_pcm_limit_hw_rates(runtime); 344 cs5535au->capture_substream = substream; 345 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]); 346 err = snd_pcm_hw_constraint_integer(runtime, 347 SNDRV_PCM_HW_PARAM_PERIODS); 348 if (err < 0) 349 return err; 350 olpc_capture_open(cs5535au->ac97); 351 return 0; 352} 353 354static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream) 355{ 356 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 357 olpc_capture_close(cs5535au->ac97); 358 return 0; 359} 360 361static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream) 362{ 363 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); 364 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE, 365 substream->runtime->rate); 366} 367 368static const struct snd_pcm_ops snd_cs5535audio_playback_ops = { 369 .open = snd_cs5535audio_playback_open, 370 .close = snd_cs5535audio_playback_close, 371 .hw_params = snd_cs5535audio_hw_params, 372 .hw_free = snd_cs5535audio_hw_free, 373 .prepare = snd_cs5535audio_playback_prepare, 374 .trigger = snd_cs5535audio_trigger, 375 .pointer = snd_cs5535audio_pcm_pointer, 376}; 377 378static const struct snd_pcm_ops snd_cs5535audio_capture_ops = { 379 .open = snd_cs5535audio_capture_open, 380 .close = snd_cs5535audio_capture_close, 381 .hw_params = snd_cs5535audio_hw_params, 382 .hw_free = snd_cs5535audio_hw_free, 383 .prepare = snd_cs5535audio_capture_prepare, 384 .trigger = snd_cs5535audio_trigger, 385 .pointer = snd_cs5535audio_pcm_pointer, 386}; 387 388static const struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = { 389 .type = CS5535AUDIO_DMA_PLAYBACK, 390 .enable_dma = cs5535audio_playback_enable_dma, 391 .disable_dma = cs5535audio_playback_disable_dma, 392 .setup_prd = cs5535audio_playback_setup_prd, 393 .read_prd = cs5535audio_playback_read_prd, 394 .pause_dma = cs5535audio_playback_pause_dma, 395 .read_dma_pntr = cs5535audio_playback_read_dma_pntr, 396}; 397 398static const struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = { 399 .type = CS5535AUDIO_DMA_CAPTURE, 400 .enable_dma = cs5535audio_capture_enable_dma, 401 .disable_dma = cs5535audio_capture_disable_dma, 402 .setup_prd = cs5535audio_capture_setup_prd, 403 .read_prd = cs5535audio_capture_read_prd, 404 .pause_dma = cs5535audio_capture_pause_dma, 405 .read_dma_pntr = cs5535audio_capture_read_dma_pntr, 406}; 407 408int snd_cs5535audio_pcm(struct cs5535audio *cs5535au) 409{ 410 struct snd_pcm *pcm; 411 int err; 412 413 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm); 414 if (err < 0) 415 return err; 416 417 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops = 418 &snd_cs5535audio_playback_dma_ops; 419 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops = 420 &snd_cs5535audio_capture_dma_ops; 421 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 422 &snd_cs5535audio_playback_ops); 423 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 424 &snd_cs5535audio_capture_ops); 425 426 pcm->private_data = cs5535au; 427 pcm->info_flags = 0; 428 strcpy(pcm->name, "CS5535 Audio"); 429 430 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, 431 &cs5535au->pci->dev, 432 64*1024, 128*1024); 433 cs5535au->pcm = pcm; 434 435 return 0; 436} 437