forked from 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.
151 lines
3.8 KiB
151 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
// |
|
// Copyright (c) 2020 BayLibre, SAS. |
|
// Author: Jerome Brunet <[email protected]> |
|
|
|
#include <linux/bitfield.h> |
|
#include <linux/clk.h> |
|
#include <sound/pcm_params.h> |
|
#include <sound/soc.h> |
|
#include <sound/soc-dai.h> |
|
|
|
#include "aiu.h" |
|
#include "aiu-fifo.h" |
|
|
|
#define AIU_I2S_SOURCE_DESC_MODE_8CH BIT(0) |
|
#define AIU_I2S_SOURCE_DESC_MODE_24BIT BIT(5) |
|
#define AIU_I2S_SOURCE_DESC_MODE_32BIT BIT(9) |
|
#define AIU_I2S_SOURCE_DESC_MODE_SPLIT BIT(11) |
|
#define AIU_MEM_I2S_MASKS_IRQ_BLOCK GENMASK(31, 16) |
|
#define AIU_MEM_I2S_CONTROL_MODE_16BIT BIT(6) |
|
#define AIU_MEM_I2S_BUF_CNTL_INIT BIT(0) |
|
#define AIU_RST_SOFT_I2S_FAST BIT(0) |
|
|
|
#define AIU_FIFO_I2S_BLOCK 256 |
|
|
|
static struct snd_pcm_hardware fifo_i2s_pcm = { |
|
.info = (SNDRV_PCM_INFO_INTERLEAVED | |
|
SNDRV_PCM_INFO_MMAP | |
|
SNDRV_PCM_INFO_MMAP_VALID | |
|
SNDRV_PCM_INFO_PAUSE), |
|
.formats = AIU_FORMATS, |
|
.rate_min = 5512, |
|
.rate_max = 192000, |
|
.channels_min = 2, |
|
.channels_max = 8, |
|
.period_bytes_min = AIU_FIFO_I2S_BLOCK, |
|
.period_bytes_max = AIU_FIFO_I2S_BLOCK * USHRT_MAX, |
|
.periods_min = 2, |
|
.periods_max = UINT_MAX, |
|
|
|
/* No real justification for this */ |
|
.buffer_bytes_max = 1 * 1024 * 1024, |
|
}; |
|
|
|
static int aiu_fifo_i2s_trigger(struct snd_pcm_substream *substream, int cmd, |
|
struct snd_soc_dai *dai) |
|
{ |
|
struct snd_soc_component *component = dai->component; |
|
|
|
switch (cmd) { |
|
case SNDRV_PCM_TRIGGER_START: |
|
case SNDRV_PCM_TRIGGER_RESUME: |
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
|
snd_soc_component_write(component, AIU_RST_SOFT, |
|
AIU_RST_SOFT_I2S_FAST); |
|
snd_soc_component_read(component, AIU_I2S_SYNC); |
|
break; |
|
} |
|
|
|
return aiu_fifo_trigger(substream, cmd, dai); |
|
} |
|
|
|
static int aiu_fifo_i2s_prepare(struct snd_pcm_substream *substream, |
|
struct snd_soc_dai *dai) |
|
{ |
|
struct snd_soc_component *component = dai->component; |
|
int ret; |
|
|
|
ret = aiu_fifo_prepare(substream, dai); |
|
if (ret) |
|
return ret; |
|
|
|
snd_soc_component_update_bits(component, |
|
AIU_MEM_I2S_BUF_CNTL, |
|
AIU_MEM_I2S_BUF_CNTL_INIT, |
|
AIU_MEM_I2S_BUF_CNTL_INIT); |
|
snd_soc_component_update_bits(component, |
|
AIU_MEM_I2S_BUF_CNTL, |
|
AIU_MEM_I2S_BUF_CNTL_INIT, 0); |
|
|
|
return 0; |
|
} |
|
|
|
static int aiu_fifo_i2s_hw_params(struct snd_pcm_substream *substream, |
|
struct snd_pcm_hw_params *params, |
|
struct snd_soc_dai *dai) |
|
{ |
|
struct snd_soc_component *component = dai->component; |
|
struct aiu_fifo *fifo = dai->playback_dma_data; |
|
unsigned int val; |
|
int ret; |
|
|
|
ret = aiu_fifo_hw_params(substream, params, dai); |
|
if (ret) |
|
return ret; |
|
|
|
switch (params_physical_width(params)) { |
|
case 16: |
|
val = AIU_MEM_I2S_CONTROL_MODE_16BIT; |
|
break; |
|
case 32: |
|
val = 0; |
|
break; |
|
default: |
|
dev_err(dai->dev, "Unsupported physical width %u\n", |
|
params_physical_width(params)); |
|
return -EINVAL; |
|
} |
|
|
|
snd_soc_component_update_bits(component, AIU_MEM_I2S_CONTROL, |
|
AIU_MEM_I2S_CONTROL_MODE_16BIT, |
|
val); |
|
|
|
/* Setup the irq periodicity */ |
|
val = params_period_bytes(params) / fifo->fifo_block; |
|
val = FIELD_PREP(AIU_MEM_I2S_MASKS_IRQ_BLOCK, val); |
|
snd_soc_component_update_bits(component, AIU_MEM_I2S_MASKS, |
|
AIU_MEM_I2S_MASKS_IRQ_BLOCK, val); |
|
|
|
return 0; |
|
} |
|
|
|
const struct snd_soc_dai_ops aiu_fifo_i2s_dai_ops = { |
|
.trigger = aiu_fifo_i2s_trigger, |
|
.prepare = aiu_fifo_i2s_prepare, |
|
.hw_params = aiu_fifo_i2s_hw_params, |
|
.startup = aiu_fifo_startup, |
|
.shutdown = aiu_fifo_shutdown, |
|
}; |
|
|
|
int aiu_fifo_i2s_dai_probe(struct snd_soc_dai *dai) |
|
{ |
|
struct snd_soc_component *component = dai->component; |
|
struct aiu *aiu = snd_soc_component_get_drvdata(component); |
|
struct aiu_fifo *fifo; |
|
int ret; |
|
|
|
ret = aiu_fifo_dai_probe(dai); |
|
if (ret) |
|
return ret; |
|
|
|
fifo = dai->playback_dma_data; |
|
|
|
fifo->pcm = &fifo_i2s_pcm; |
|
fifo->mem_offset = AIU_MEM_I2S_START; |
|
fifo->fifo_block = AIU_FIFO_I2S_BLOCK; |
|
fifo->pclk = aiu->i2s.clks[PCLK].clk; |
|
fifo->irq = aiu->i2s.irq; |
|
|
|
return 0; |
|
}
|
|
|