mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
435 lines
12 KiB
435 lines
12 KiB
// 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, |
|
&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 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; |
|
|
|
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]); |
|
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, |
|
.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; |
|
} |
|
|
|
|