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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for audio on multifunction CS5535 companion device4 * Copyright (C) Jaya Kumar5 *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, pm10 */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_RESUME32 ),33 .formats = (34 SNDRV_PCM_FMTBIT_S16_LE35 ),36 .rates = (37 SNDRV_PCM_RATE_CONTINUOUS |38 SNDRV_PCM_RATE_8000_4800039 ),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_VALID59 ),60 .formats = (61 SNDRV_PCM_FMTBIT_S16_LE62 ),63 .rates = (64 SNDRV_PCM_RATE_CONTINUOUS |65 SNDRV_PCM_RATE_8000_4800066 ),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, 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 told132 pci alloc that we're only 32 bit capable so the upper will be 0 */133 addr = (u32) substream->runtime->dma_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 addr += period_bytes;141 }142 /* we reserved one dummy descriptor at the end to do the PRD jump */143 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];144 lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);145 lastdesc->size = 0;146 lastdesc->ctlreserved = cpu_to_le16(PRD_JMP);147 jmpprd_addr = (u32)dma->desc_buf.addr +148 sizeof(struct cs5535audio_dma_desc) * periods;149 150 dma->substream = substream;151 dma->period_bytes = period_bytes;152 dma->periods = periods;153 spin_lock_irq(&cs5535au->reg_lock);154 dma->ops->disable_dma(cs5535au);155 dma->ops->setup_prd(cs5535au, jmpprd_addr);156 spin_unlock_irq(&cs5535au->reg_lock);157 return 0;158}159 160static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)161{162 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);163}164 165static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)166{167 cs_writeb(cs5535au, ACC_BM0_CMD, 0);168}169 170static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)171{172 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);173}174 175static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,176 u32 prd_addr)177{178 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);179}180 181static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)182{183 return cs_readl(cs5535au, ACC_BM0_PRD);184}185 186static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)187{188 return cs_readl(cs5535au, ACC_BM0_PNTR);189}190 191static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)192{193 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);194}195 196static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)197{198 cs_writeb(cs5535au, ACC_BM1_CMD, 0);199}200 201static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)202{203 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);204}205 206static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,207 u32 prd_addr)208{209 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);210}211 212static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)213{214 return cs_readl(cs5535au, ACC_BM1_PRD);215}216 217static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)218{219 return cs_readl(cs5535au, ACC_BM1_PNTR);220}221 222static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,223 struct cs5535audio_dma *dma,224 struct snd_pcm_substream *substream)225{226 snd_dma_free_pages(&dma->desc_buf);227 dma->desc_buf.area = NULL;228 dma->substream = NULL;229}230 231static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,232 struct snd_pcm_hw_params *hw_params)233{234 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);235 struct cs5535audio_dma *dma = substream->runtime->private_data;236 int err;237 238 dma->buf_addr = substream->runtime->dma_addr;239 dma->buf_bytes = params_buffer_bytes(hw_params);240 241 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,242 params_periods(hw_params),243 params_period_bytes(hw_params));244 if (!err)245 dma->pcm_open_flag = 1;246 247 return err;248}249 250static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)251{252 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);253 struct cs5535audio_dma *dma = substream->runtime->private_data;254 255 if (dma->pcm_open_flag) {256 if (substream == cs5535au->playback_substream)257 snd_ac97_update_power(cs5535au->ac97,258 AC97_PCM_FRONT_DAC_RATE, 0);259 else260 snd_ac97_update_power(cs5535au->ac97,261 AC97_PCM_LR_ADC_RATE, 0);262 dma->pcm_open_flag = 0;263 }264 cs5535audio_clear_dma_packets(cs5535au, dma, substream);265 return 0;266}267 268static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)269{270 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);271 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,272 substream->runtime->rate);273}274 275static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)276{277 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);278 struct cs5535audio_dma *dma = substream->runtime->private_data;279 int err = 0;280 281 spin_lock(&cs5535au->reg_lock);282 switch (cmd) {283 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:284 dma->ops->pause_dma(cs5535au);285 break;286 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:287 dma->ops->enable_dma(cs5535au);288 break;289 case SNDRV_PCM_TRIGGER_START:290 dma->ops->enable_dma(cs5535au);291 break;292 case SNDRV_PCM_TRIGGER_RESUME:293 dma->ops->enable_dma(cs5535au);294 break;295 case SNDRV_PCM_TRIGGER_STOP:296 dma->ops->disable_dma(cs5535au);297 break;298 case SNDRV_PCM_TRIGGER_SUSPEND:299 dma->ops->disable_dma(cs5535au);300 break;301 default:302 dev_err(cs5535au->card->dev, "unhandled trigger\n");303 err = -EINVAL;304 break;305 }306 spin_unlock(&cs5535au->reg_lock);307 return err;308}309 310static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream311 *substream)312{313 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);314 u32 curdma;315 struct cs5535audio_dma *dma;316 317 dma = substream->runtime->private_data;318 curdma = dma->ops->read_dma_pntr(cs5535au);319 if (curdma < dma->buf_addr) {320 dev_err(cs5535au->card->dev, "curdma=%x < %x bufaddr.\n",321 curdma, dma->buf_addr);322 return 0;323 }324 curdma -= dma->buf_addr;325 if (curdma >= dma->buf_bytes) {326 dev_err(cs5535au->card->dev, "diff=%x >= %x buf_bytes.\n",327 curdma, dma->buf_bytes);328 return 0;329 }330 return bytes_to_frames(substream->runtime, curdma);331}332 333static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)334{335 int err;336 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);337 struct snd_pcm_runtime *runtime = substream->runtime;338 339 runtime->hw = snd_cs5535audio_capture;340 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];341 snd_pcm_limit_hw_rates(runtime);342 cs5535au->capture_substream = substream;343 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);344 err = snd_pcm_hw_constraint_integer(runtime,345 SNDRV_PCM_HW_PARAM_PERIODS);346 if (err < 0)347 return err;348 olpc_capture_open(cs5535au->ac97);349 return 0;350}351 352static 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 359static 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 366static 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 376static 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 386static 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 396static 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 406int 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}435 436