| // 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]); |
| if ((err = snd_pcm_hw_constraint_integer(runtime, |
| SNDRV_PCM_HW_PARAM_PERIODS)) < 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, desc_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, |
| snd_dma_pci_data(cs5535au->pci), |
| 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 uppper will be 0 */ |
| addr = (u32) substream->runtime->dma_addr; |
| desc_addr = (u32) dma->desc_buf.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); |
| desc_addr += sizeof(struct cs5535audio_dma_desc); |
| 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; |
| |
| err = snd_pcm_lib_malloc_pages(substream, |
| params_buffer_bytes(hw_params)); |
| if (err < 0) |
| return 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 snd_pcm_lib_free_pages(substream); |
| } |
| |
| 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]); |
| if ((err = snd_pcm_hw_constraint_integer(runtime, |
| SNDRV_PCM_HW_PARAM_PERIODS)) < 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, |
| .ioctl = snd_pcm_lib_ioctl, |
| .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, |
| .ioctl = snd_pcm_lib_ioctl, |
| .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_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, |
| snd_dma_pci_data(cs5535au->pci), |
| 64*1024, 128*1024); |
| cs5535au->pcm = pcm; |
| |
| return 0; |
| } |
| |
