diff options
Diffstat (limited to 'sound/pci/cs5535audio/cs5535audio_pcm.c')
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio_pcm.c | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/sound/pci/cs5535audio/cs5535audio_pcm.c b/sound/pci/cs5535audio/cs5535audio_pcm.c new file mode 100644 index 0000000000..9c88e99e37 --- /dev/null +++ b/sound/pci/cs5535audio/cs5535audio_pcm.c @@ -0,0 +1,435 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for audio on multifunction CS5535 companion device + * Copyright (C) Jaya Kumar + * + * Based on Jaroslav Kysela and Takashi Iwai's examples. + * This work was sponsored by CIS(M) Sdn Bhd. + * + * todo: add be fmt support, spdif, pm + */ + +#include <linux/init.h> +#include <linux/pci.h> +#include <sound/core.h> +#include <sound/control.h> +#include <sound/initval.h> +#include <sound/asoundef.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/ac97_codec.h> +#include "cs5535audio.h" + +static const struct snd_pcm_hardware snd_cs5535audio_playback = +{ + .info = ( + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_RESUME + ), + .formats = ( + SNDRV_PCM_FMTBIT_S16_LE + ), + .rates = ( + SNDRV_PCM_RATE_CONTINUOUS | + SNDRV_PCM_RATE_8000_48000 + ), + .rate_min = 4000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = (128*1024), + .period_bytes_min = 64, + .period_bytes_max = (64*1024 - 16), + .periods_min = 1, + .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, + .fifo_size = 0, +}; + +static const struct snd_pcm_hardware snd_cs5535audio_capture = +{ + .info = ( + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID + ), + .formats = ( + SNDRV_PCM_FMTBIT_S16_LE + ), + .rates = ( + SNDRV_PCM_RATE_CONTINUOUS | + SNDRV_PCM_RATE_8000_48000 + ), + .rate_min = 4000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = (128*1024), + .period_bytes_min = 64, + .period_bytes_max = (64*1024 - 16), + .periods_min = 1, + .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, + .fifo_size = 0, +}; + +static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream) +{ + int err; + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + + runtime->hw = snd_cs5535audio_playback; + runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC]; + snd_pcm_limit_hw_rates(runtime); + cs5535au->playback_substream = substream; + runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]); + err = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) + return err; + + return 0; +} + +static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream) +{ + return 0; +} + +#define CS5535AUDIO_DESC_LIST_SIZE \ + PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc)) + +static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au, + struct cs5535audio_dma *dma, + struct snd_pcm_substream *substream, + unsigned int periods, + unsigned int period_bytes) +{ + unsigned int i; + u32 addr, jmpprd_addr; + struct cs5535audio_dma_desc *lastdesc; + + if (periods > CS5535AUDIO_MAX_DESCRIPTORS) + return -ENOMEM; + + if (dma->desc_buf.area == NULL) { + if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, + &cs5535au->pci->dev, + CS5535AUDIO_DESC_LIST_SIZE+1, + &dma->desc_buf) < 0) + return -ENOMEM; + dma->period_bytes = dma->periods = 0; + } + + if (dma->periods == periods && dma->period_bytes == period_bytes) + return 0; + + /* the u32 cast is okay because in snd*create we successfully told + pci alloc that we're only 32 bit capable so the upper will be 0 */ + addr = (u32) substream->runtime->dma_addr; + for (i = 0; i < periods; i++) { + struct cs5535audio_dma_desc *desc = + &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i]; + desc->addr = cpu_to_le32(addr); + desc->size = cpu_to_le16(period_bytes); + desc->ctlreserved = cpu_to_le16(PRD_EOP); + addr += period_bytes; + } + /* we reserved one dummy descriptor at the end to do the PRD jump */ + lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods]; + lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr); + lastdesc->size = 0; + lastdesc->ctlreserved = cpu_to_le16(PRD_JMP); + jmpprd_addr = (u32)dma->desc_buf.addr + + sizeof(struct cs5535audio_dma_desc) * periods; + + dma->substream = substream; + dma->period_bytes = period_bytes; + dma->periods = periods; + spin_lock_irq(&cs5535au->reg_lock); + dma->ops->disable_dma(cs5535au); + dma->ops->setup_prd(cs5535au, jmpprd_addr); + spin_unlock_irq(&cs5535au->reg_lock); + return 0; +} + +static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au) +{ + cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN); +} + +static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au) +{ + cs_writeb(cs5535au, ACC_BM0_CMD, 0); +} + +static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au) +{ + cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE); +} + +static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au, + u32 prd_addr) +{ + cs_writel(cs5535au, ACC_BM0_PRD, prd_addr); +} + +static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au) +{ + return cs_readl(cs5535au, ACC_BM0_PRD); +} + +static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au) +{ + return cs_readl(cs5535au, ACC_BM0_PNTR); +} + +static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au) +{ + cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN); +} + +static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au) +{ + cs_writeb(cs5535au, ACC_BM1_CMD, 0); +} + +static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au) +{ + cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE); +} + +static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au, + u32 prd_addr) +{ + cs_writel(cs5535au, ACC_BM1_PRD, prd_addr); +} + +static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au) +{ + return cs_readl(cs5535au, ACC_BM1_PRD); +} + +static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au) +{ + return cs_readl(cs5535au, ACC_BM1_PNTR); +} + +static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au, + struct cs5535audio_dma *dma, + struct snd_pcm_substream *substream) +{ + snd_dma_free_pages(&dma->desc_buf); + dma->desc_buf.area = NULL; + dma->substream = NULL; +} + +static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + struct cs5535audio_dma *dma = substream->runtime->private_data; + int err; + + dma->buf_addr = substream->runtime->dma_addr; + dma->buf_bytes = params_buffer_bytes(hw_params); + + err = cs5535audio_build_dma_packets(cs5535au, dma, substream, + params_periods(hw_params), + params_period_bytes(hw_params)); + if (!err) + dma->pcm_open_flag = 1; + + return err; +} + +static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream) +{ + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + struct cs5535audio_dma *dma = substream->runtime->private_data; + + if (dma->pcm_open_flag) { + if (substream == cs5535au->playback_substream) + snd_ac97_update_power(cs5535au->ac97, + AC97_PCM_FRONT_DAC_RATE, 0); + else + snd_ac97_update_power(cs5535au->ac97, + AC97_PCM_LR_ADC_RATE, 0); + dma->pcm_open_flag = 0; + } + cs5535audio_clear_dma_packets(cs5535au, dma, substream); + return 0; +} + +static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream) +{ + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE, + substream->runtime->rate); +} + +static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + struct cs5535audio_dma *dma = substream->runtime->private_data; + int err = 0; + + spin_lock(&cs5535au->reg_lock); + switch (cmd) { + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dma->ops->pause_dma(cs5535au); + break; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + dma->ops->enable_dma(cs5535au); + break; + case SNDRV_PCM_TRIGGER_START: + dma->ops->enable_dma(cs5535au); + break; + case SNDRV_PCM_TRIGGER_RESUME: + dma->ops->enable_dma(cs5535au); + break; + case SNDRV_PCM_TRIGGER_STOP: + dma->ops->disable_dma(cs5535au); + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + dma->ops->disable_dma(cs5535au); + break; + default: + dev_err(cs5535au->card->dev, "unhandled trigger\n"); + err = -EINVAL; + break; + } + spin_unlock(&cs5535au->reg_lock); + return err; +} + +static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream + *substream) +{ + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + u32 curdma; + struct cs5535audio_dma *dma; + + dma = substream->runtime->private_data; + curdma = dma->ops->read_dma_pntr(cs5535au); + if (curdma < dma->buf_addr) { + dev_err(cs5535au->card->dev, "curdma=%x < %x bufaddr.\n", + curdma, dma->buf_addr); + return 0; + } + curdma -= dma->buf_addr; + if (curdma >= dma->buf_bytes) { + dev_err(cs5535au->card->dev, "diff=%x >= %x buf_bytes.\n", + curdma, dma->buf_bytes); + return 0; + } + return bytes_to_frames(substream->runtime, curdma); +} + +static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream) +{ + int err; + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + + runtime->hw = snd_cs5535audio_capture; + runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC]; + snd_pcm_limit_hw_rates(runtime); + cs5535au->capture_substream = substream; + runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]); + err = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) + return err; + olpc_capture_open(cs5535au->ac97); + return 0; +} + +static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream) +{ + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + olpc_capture_close(cs5535au->ac97); + return 0; +} + +static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream) +{ + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE, + substream->runtime->rate); +} + +static const struct snd_pcm_ops snd_cs5535audio_playback_ops = { + .open = snd_cs5535audio_playback_open, + .close = snd_cs5535audio_playback_close, + .hw_params = snd_cs5535audio_hw_params, + .hw_free = snd_cs5535audio_hw_free, + .prepare = snd_cs5535audio_playback_prepare, + .trigger = snd_cs5535audio_trigger, + .pointer = snd_cs5535audio_pcm_pointer, +}; + +static const struct snd_pcm_ops snd_cs5535audio_capture_ops = { + .open = snd_cs5535audio_capture_open, + .close = snd_cs5535audio_capture_close, + .hw_params = snd_cs5535audio_hw_params, + .hw_free = snd_cs5535audio_hw_free, + .prepare = snd_cs5535audio_capture_prepare, + .trigger = snd_cs5535audio_trigger, + .pointer = snd_cs5535audio_pcm_pointer, +}; + +static const struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = { + .type = CS5535AUDIO_DMA_PLAYBACK, + .enable_dma = cs5535audio_playback_enable_dma, + .disable_dma = cs5535audio_playback_disable_dma, + .setup_prd = cs5535audio_playback_setup_prd, + .read_prd = cs5535audio_playback_read_prd, + .pause_dma = cs5535audio_playback_pause_dma, + .read_dma_pntr = cs5535audio_playback_read_dma_pntr, +}; + +static const struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = { + .type = CS5535AUDIO_DMA_CAPTURE, + .enable_dma = cs5535audio_capture_enable_dma, + .disable_dma = cs5535audio_capture_disable_dma, + .setup_prd = cs5535audio_capture_setup_prd, + .read_prd = cs5535audio_capture_read_prd, + .pause_dma = cs5535audio_capture_pause_dma, + .read_dma_pntr = cs5535audio_capture_read_dma_pntr, +}; + +int snd_cs5535audio_pcm(struct cs5535audio *cs5535au) +{ + struct snd_pcm *pcm; + int err; + + err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm); + if (err < 0) + return err; + + cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops = + &snd_cs5535audio_playback_dma_ops; + cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops = + &snd_cs5535audio_capture_dma_ops; + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, + &snd_cs5535audio_playback_ops); + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, + &snd_cs5535audio_capture_ops); + + pcm->private_data = cs5535au; + pcm->info_flags = 0; + strcpy(pcm->name, "CS5535 Audio"); + + snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, + &cs5535au->pci->dev, + 64*1024, 128*1024); + cs5535au->pcm = pcm; + + return 0; +} + |