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linux/sound/soc/xilinx/xlnx_formatter_pcm.c
Uwe Kleine-König bf6b5ced96
ASoC: xilinx: xlnx_formatter_pcm: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20230315150745.67084-170-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-20 13:09:33 +00:00

726 lines
19 KiB
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// SPDX-License-Identifier: GPL-2.0
//
// Xilinx ASoC audio formatter support
//
// Copyright (C) 2018 Xilinx, Inc.
//
// Author: Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/sizes.h>
#include <sound/asoundef.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#define DRV_NAME "xlnx_formatter_pcm"
#define XLNX_S2MM_OFFSET 0
#define XLNX_MM2S_OFFSET 0x100
#define XLNX_AUD_CORE_CONFIG 0x4
#define XLNX_AUD_CTRL 0x10
#define XLNX_AUD_STS 0x14
#define AUD_CTRL_RESET_MASK BIT(1)
#define AUD_CFG_MM2S_MASK BIT(15)
#define AUD_CFG_S2MM_MASK BIT(31)
#define XLNX_AUD_FS_MULTIPLIER 0x18
#define XLNX_AUD_PERIOD_CONFIG 0x1C
#define XLNX_AUD_BUFF_ADDR_LSB 0x20
#define XLNX_AUD_BUFF_ADDR_MSB 0x24
#define XLNX_AUD_XFER_COUNT 0x28
#define XLNX_AUD_CH_STS_START 0x2C
#define XLNX_BYTES_PER_CH 0x44
#define XLNX_AUD_ALIGN_BYTES 64
#define AUD_STS_IOC_IRQ_MASK BIT(31)
#define AUD_STS_CH_STS_MASK BIT(29)
#define AUD_CTRL_IOC_IRQ_MASK BIT(13)
#define AUD_CTRL_TOUT_IRQ_MASK BIT(14)
#define AUD_CTRL_DMA_EN_MASK BIT(0)
#define CFG_MM2S_CH_MASK GENMASK(11, 8)
#define CFG_MM2S_CH_SHIFT 8
#define CFG_MM2S_XFER_MASK GENMASK(14, 13)
#define CFG_MM2S_XFER_SHIFT 13
#define CFG_MM2S_PKG_MASK BIT(12)
#define CFG_S2MM_CH_MASK GENMASK(27, 24)
#define CFG_S2MM_CH_SHIFT 24
#define CFG_S2MM_XFER_MASK GENMASK(30, 29)
#define CFG_S2MM_XFER_SHIFT 29
#define CFG_S2MM_PKG_MASK BIT(28)
#define AUD_CTRL_DATA_WIDTH_SHIFT 16
#define AUD_CTRL_ACTIVE_CH_SHIFT 19
#define PERIOD_CFG_PERIODS_SHIFT 16
#define PERIODS_MIN 2
#define PERIODS_MAX 6
#define PERIOD_BYTES_MIN 192
#define PERIOD_BYTES_MAX (50 * 1024)
#define XLNX_PARAM_UNKNOWN 0
enum bit_depth {
BIT_DEPTH_8,
BIT_DEPTH_16,
BIT_DEPTH_20,
BIT_DEPTH_24,
BIT_DEPTH_32,
};
struct xlnx_pcm_drv_data {
void __iomem *mmio;
bool s2mm_presence;
bool mm2s_presence;
int s2mm_irq;
int mm2s_irq;
struct snd_pcm_substream *play_stream;
struct snd_pcm_substream *capture_stream;
struct clk *axi_clk;
unsigned int sysclk;
};
/*
* struct xlnx_pcm_stream_param - stream configuration
* @mmio: base address offset
* @interleaved: audio channels arrangement in buffer
* @xfer_mode: data formatting mode during transfer
* @ch_limit: Maximum channels supported
* @buffer_size: stream ring buffer size
*/
struct xlnx_pcm_stream_param {
void __iomem *mmio;
bool interleaved;
u32 xfer_mode;
u32 ch_limit;
u64 buffer_size;
};
static const struct snd_pcm_hardware xlnx_pcm_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE,
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.rate_min = 8000,
.rate_max = 192000,
.buffer_bytes_max = PERIODS_MAX * PERIOD_BYTES_MAX,
.period_bytes_min = PERIOD_BYTES_MIN,
.period_bytes_max = PERIOD_BYTES_MAX,
.periods_min = PERIODS_MIN,
.periods_max = PERIODS_MAX,
};
enum {
AES_TO_AES,
AES_TO_PCM,
PCM_TO_PCM,
PCM_TO_AES
};
static void xlnx_parse_aes_params(u32 chsts_reg1_val, u32 chsts_reg2_val,
struct device *dev)
{
u32 padded, srate, bit_depth, status[2];
if (chsts_reg1_val & IEC958_AES0_PROFESSIONAL) {
status[0] = chsts_reg1_val & 0xff;
status[1] = (chsts_reg1_val >> 16) & 0xff;
switch (status[0] & IEC958_AES0_PRO_FS) {
case IEC958_AES0_PRO_FS_44100:
srate = 44100;
break;
case IEC958_AES0_PRO_FS_48000:
srate = 48000;
break;
case IEC958_AES0_PRO_FS_32000:
srate = 32000;
break;
case IEC958_AES0_PRO_FS_NOTID:
default:
srate = XLNX_PARAM_UNKNOWN;
break;
}
switch (status[1] & IEC958_AES2_PRO_SBITS) {
case IEC958_AES2_PRO_WORDLEN_NOTID:
case IEC958_AES2_PRO_SBITS_20:
padded = 0;
break;
case IEC958_AES2_PRO_SBITS_24:
padded = 4;
break;
default:
bit_depth = XLNX_PARAM_UNKNOWN;
goto log_params;
}
switch (status[1] & IEC958_AES2_PRO_WORDLEN) {
case IEC958_AES2_PRO_WORDLEN_20_16:
bit_depth = 16 + padded;
break;
case IEC958_AES2_PRO_WORDLEN_22_18:
bit_depth = 18 + padded;
break;
case IEC958_AES2_PRO_WORDLEN_23_19:
bit_depth = 19 + padded;
break;
case IEC958_AES2_PRO_WORDLEN_24_20:
bit_depth = 20 + padded;
break;
case IEC958_AES2_PRO_WORDLEN_NOTID:
default:
bit_depth = XLNX_PARAM_UNKNOWN;
break;
}
} else {
status[0] = (chsts_reg1_val >> 24) & 0xff;
status[1] = chsts_reg2_val & 0xff;
switch (status[0] & IEC958_AES3_CON_FS) {
case IEC958_AES3_CON_FS_44100:
srate = 44100;
break;
case IEC958_AES3_CON_FS_48000:
srate = 48000;
break;
case IEC958_AES3_CON_FS_32000:
srate = 32000;
break;
default:
srate = XLNX_PARAM_UNKNOWN;
break;
}
if (status[1] & IEC958_AES4_CON_MAX_WORDLEN_24)
padded = 4;
else
padded = 0;
switch (status[1] & IEC958_AES4_CON_WORDLEN) {
case IEC958_AES4_CON_WORDLEN_20_16:
bit_depth = 16 + padded;
break;
case IEC958_AES4_CON_WORDLEN_22_18:
bit_depth = 18 + padded;
break;
case IEC958_AES4_CON_WORDLEN_23_19:
bit_depth = 19 + padded;
break;
case IEC958_AES4_CON_WORDLEN_24_20:
bit_depth = 20 + padded;
break;
case IEC958_AES4_CON_WORDLEN_21_17:
bit_depth = 17 + padded;
break;
case IEC958_AES4_CON_WORDLEN_NOTID:
default:
bit_depth = XLNX_PARAM_UNKNOWN;
break;
}
}
log_params:
if (srate != XLNX_PARAM_UNKNOWN)
dev_info(dev, "sample rate = %d\n", srate);
else
dev_info(dev, "sample rate = unknown\n");
if (bit_depth != XLNX_PARAM_UNKNOWN)
dev_info(dev, "bit_depth = %d\n", bit_depth);
else
dev_info(dev, "bit_depth = unknown\n");
}
static int xlnx_formatter_pcm_reset(void __iomem *mmio_base)
{
u32 val, retries = 0;
val = readl(mmio_base + XLNX_AUD_CTRL);
val |= AUD_CTRL_RESET_MASK;
writel(val, mmio_base + XLNX_AUD_CTRL);
val = readl(mmio_base + XLNX_AUD_CTRL);
/* Poll for maximum timeout of approximately 100ms (1 * 100)*/
while ((val & AUD_CTRL_RESET_MASK) && (retries < 100)) {
mdelay(1);
retries++;
val = readl(mmio_base + XLNX_AUD_CTRL);
}
if (val & AUD_CTRL_RESET_MASK)
return -ENODEV;
return 0;
}
static void xlnx_formatter_disable_irqs(void __iomem *mmio_base, int stream)
{
u32 val;
val = readl(mmio_base + XLNX_AUD_CTRL);
val &= ~AUD_CTRL_IOC_IRQ_MASK;
if (stream == SNDRV_PCM_STREAM_CAPTURE)
val &= ~AUD_CTRL_TOUT_IRQ_MASK;
writel(val, mmio_base + XLNX_AUD_CTRL);
}
static irqreturn_t xlnx_mm2s_irq_handler(int irq, void *arg)
{
u32 val;
void __iomem *reg;
struct device *dev = arg;
struct xlnx_pcm_drv_data *adata = dev_get_drvdata(dev);
reg = adata->mmio + XLNX_MM2S_OFFSET + XLNX_AUD_STS;
val = readl(reg);
if (val & AUD_STS_IOC_IRQ_MASK) {
writel(val & AUD_STS_IOC_IRQ_MASK, reg);
if (adata->play_stream)
snd_pcm_period_elapsed(adata->play_stream);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static irqreturn_t xlnx_s2mm_irq_handler(int irq, void *arg)
{
u32 val;
void __iomem *reg;
struct device *dev = arg;
struct xlnx_pcm_drv_data *adata = dev_get_drvdata(dev);
reg = adata->mmio + XLNX_S2MM_OFFSET + XLNX_AUD_STS;
val = readl(reg);
if (val & AUD_STS_IOC_IRQ_MASK) {
writel(val & AUD_STS_IOC_IRQ_MASK, reg);
if (adata->capture_stream)
snd_pcm_period_elapsed(adata->capture_stream);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static int xlnx_formatter_set_sysclk(struct snd_soc_component *component,
int clk_id, int source, unsigned int freq, int dir)
{
struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev);
adata->sysclk = freq;
return 0;
}
static int xlnx_formatter_pcm_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
int err;
u32 val, data_format_mode;
u32 ch_count_mask, ch_count_shift, data_xfer_mode, data_xfer_shift;
struct xlnx_pcm_stream_param *stream_data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
!adata->mm2s_presence)
return -ENODEV;
else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
!adata->s2mm_presence)
return -ENODEV;
stream_data = kzalloc(sizeof(*stream_data), GFP_KERNEL);
if (!stream_data)
return -ENOMEM;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ch_count_mask = CFG_MM2S_CH_MASK;
ch_count_shift = CFG_MM2S_CH_SHIFT;
data_xfer_mode = CFG_MM2S_XFER_MASK;
data_xfer_shift = CFG_MM2S_XFER_SHIFT;
data_format_mode = CFG_MM2S_PKG_MASK;
stream_data->mmio = adata->mmio + XLNX_MM2S_OFFSET;
adata->play_stream = substream;
} else {
ch_count_mask = CFG_S2MM_CH_MASK;
ch_count_shift = CFG_S2MM_CH_SHIFT;
data_xfer_mode = CFG_S2MM_XFER_MASK;
data_xfer_shift = CFG_S2MM_XFER_SHIFT;
data_format_mode = CFG_S2MM_PKG_MASK;
stream_data->mmio = adata->mmio + XLNX_S2MM_OFFSET;
adata->capture_stream = substream;
}
val = readl(adata->mmio + XLNX_AUD_CORE_CONFIG);
if (!(val & data_format_mode))
stream_data->interleaved = true;
stream_data->xfer_mode = (val & data_xfer_mode) >> data_xfer_shift;
stream_data->ch_limit = (val & ch_count_mask) >> ch_count_shift;
dev_info(component->dev,
"stream %d : format = %d mode = %d ch_limit = %d\n",
substream->stream, stream_data->interleaved,
stream_data->xfer_mode, stream_data->ch_limit);
snd_soc_set_runtime_hwparams(substream, &xlnx_pcm_hardware);
runtime->private_data = stream_data;
/* Resize the period bytes as divisible by 64 */
err = snd_pcm_hw_constraint_step(runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
XLNX_AUD_ALIGN_BYTES);
if (err) {
dev_err(component->dev,
"Unable to set constraint on period bytes\n");
return err;
}
/* Resize the buffer bytes as divisible by 64 */
err = snd_pcm_hw_constraint_step(runtime, 0,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
XLNX_AUD_ALIGN_BYTES);
if (err) {
dev_err(component->dev,
"Unable to set constraint on buffer bytes\n");
return err;
}
/* Set periods as integer multiple */
err = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (err < 0) {
dev_err(component->dev,
"Unable to set constraint on periods to be integer\n");
return err;
}
/* enable DMA IOC irq */
val = readl(stream_data->mmio + XLNX_AUD_CTRL);
val |= AUD_CTRL_IOC_IRQ_MASK;
writel(val, stream_data->mmio + XLNX_AUD_CTRL);
return 0;
}
static int xlnx_formatter_pcm_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
int ret;
struct xlnx_pcm_stream_param *stream_data =
substream->runtime->private_data;
ret = xlnx_formatter_pcm_reset(stream_data->mmio);
if (ret) {
dev_err(component->dev, "audio formatter reset failed\n");
goto err_reset;
}
xlnx_formatter_disable_irqs(stream_data->mmio, substream->stream);
err_reset:
kfree(stream_data);
return 0;
}
static snd_pcm_uframes_t
xlnx_formatter_pcm_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
u32 pos;
struct snd_pcm_runtime *runtime = substream->runtime;
struct xlnx_pcm_stream_param *stream_data = runtime->private_data;
pos = readl(stream_data->mmio + XLNX_AUD_XFER_COUNT);
if (pos >= stream_data->buffer_size)
pos = 0;
return bytes_to_frames(runtime, pos);
}
static int xlnx_formatter_pcm_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
u32 low, high, active_ch, val, bytes_per_ch, bits_per_sample;
u32 aes_reg1_val, aes_reg2_val;
u64 size;
struct snd_pcm_runtime *runtime = substream->runtime;
struct xlnx_pcm_stream_param *stream_data = runtime->private_data;
struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev);
active_ch = params_channels(params);
if (active_ch > stream_data->ch_limit)
return -EINVAL;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
adata->sysclk) {
unsigned int mclk_fs = adata->sysclk / params_rate(params);
if (adata->sysclk % params_rate(params) != 0) {
dev_warn(component->dev, "sysclk %u not divisible by rate %u\n",
adata->sysclk, params_rate(params));
return -EINVAL;
}
writel(mclk_fs, stream_data->mmio + XLNX_AUD_FS_MULTIPLIER);
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
stream_data->xfer_mode == AES_TO_PCM) {
val = readl(stream_data->mmio + XLNX_AUD_STS);
if (val & AUD_STS_CH_STS_MASK) {
aes_reg1_val = readl(stream_data->mmio +
XLNX_AUD_CH_STS_START);
aes_reg2_val = readl(stream_data->mmio +
XLNX_AUD_CH_STS_START + 0x4);
xlnx_parse_aes_params(aes_reg1_val, aes_reg2_val,
component->dev);
}
}
size = params_buffer_bytes(params);
stream_data->buffer_size = size;
low = lower_32_bits(runtime->dma_addr);
high = upper_32_bits(runtime->dma_addr);
writel(low, stream_data->mmio + XLNX_AUD_BUFF_ADDR_LSB);
writel(high, stream_data->mmio + XLNX_AUD_BUFF_ADDR_MSB);
val = readl(stream_data->mmio + XLNX_AUD_CTRL);
bits_per_sample = params_width(params);
switch (bits_per_sample) {
case 8:
val |= (BIT_DEPTH_8 << AUD_CTRL_DATA_WIDTH_SHIFT);
break;
case 16:
val |= (BIT_DEPTH_16 << AUD_CTRL_DATA_WIDTH_SHIFT);
break;
case 20:
val |= (BIT_DEPTH_20 << AUD_CTRL_DATA_WIDTH_SHIFT);
break;
case 24:
val |= (BIT_DEPTH_24 << AUD_CTRL_DATA_WIDTH_SHIFT);
break;
case 32:
val |= (BIT_DEPTH_32 << AUD_CTRL_DATA_WIDTH_SHIFT);
break;
default:
return -EINVAL;
}
val |= active_ch << AUD_CTRL_ACTIVE_CH_SHIFT;
writel(val, stream_data->mmio + XLNX_AUD_CTRL);
val = (params_periods(params) << PERIOD_CFG_PERIODS_SHIFT)
| params_period_bytes(params);
writel(val, stream_data->mmio + XLNX_AUD_PERIOD_CONFIG);
bytes_per_ch = DIV_ROUND_UP(params_period_bytes(params), active_ch);
writel(bytes_per_ch, stream_data->mmio + XLNX_BYTES_PER_CH);
return 0;
}
static int xlnx_formatter_pcm_trigger(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
int cmd)
{
u32 val;
struct xlnx_pcm_stream_param *stream_data =
substream->runtime->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
val = readl(stream_data->mmio + XLNX_AUD_CTRL);
val |= AUD_CTRL_DMA_EN_MASK;
writel(val, stream_data->mmio + XLNX_AUD_CTRL);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
val = readl(stream_data->mmio + XLNX_AUD_CTRL);
val &= ~AUD_CTRL_DMA_EN_MASK;
writel(val, stream_data->mmio + XLNX_AUD_CTRL);
break;
}
return 0;
}
static int xlnx_formatter_pcm_new(struct snd_soc_component *component,
struct snd_soc_pcm_runtime *rtd)
{
snd_pcm_set_managed_buffer_all(rtd->pcm,
SNDRV_DMA_TYPE_DEV, component->dev,
xlnx_pcm_hardware.buffer_bytes_max,
xlnx_pcm_hardware.buffer_bytes_max);
return 0;
}
static const struct snd_soc_component_driver xlnx_asoc_component = {
.name = DRV_NAME,
.set_sysclk = xlnx_formatter_set_sysclk,
.open = xlnx_formatter_pcm_open,
.close = xlnx_formatter_pcm_close,
.hw_params = xlnx_formatter_pcm_hw_params,
.trigger = xlnx_formatter_pcm_trigger,
.pointer = xlnx_formatter_pcm_pointer,
.pcm_construct = xlnx_formatter_pcm_new,
};
static int xlnx_formatter_pcm_probe(struct platform_device *pdev)
{
int ret;
u32 val;
struct xlnx_pcm_drv_data *aud_drv_data;
struct device *dev = &pdev->dev;
aud_drv_data = devm_kzalloc(dev, sizeof(*aud_drv_data), GFP_KERNEL);
if (!aud_drv_data)
return -ENOMEM;
aud_drv_data->axi_clk = devm_clk_get(dev, "s_axi_lite_aclk");
if (IS_ERR(aud_drv_data->axi_clk)) {
ret = PTR_ERR(aud_drv_data->axi_clk);
dev_err(dev, "failed to get s_axi_lite_aclk(%d)\n", ret);
return ret;
}
ret = clk_prepare_enable(aud_drv_data->axi_clk);
if (ret) {
dev_err(dev,
"failed to enable s_axi_lite_aclk(%d)\n", ret);
return ret;
}
aud_drv_data->mmio = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(aud_drv_data->mmio)) {
dev_err(dev, "audio formatter ioremap failed\n");
ret = PTR_ERR(aud_drv_data->mmio);
goto clk_err;
}
val = readl(aud_drv_data->mmio + XLNX_AUD_CORE_CONFIG);
if (val & AUD_CFG_MM2S_MASK) {
aud_drv_data->mm2s_presence = true;
ret = xlnx_formatter_pcm_reset(aud_drv_data->mmio +
XLNX_MM2S_OFFSET);
if (ret) {
dev_err(dev, "audio formatter reset failed\n");
goto clk_err;
}
xlnx_formatter_disable_irqs(aud_drv_data->mmio +
XLNX_MM2S_OFFSET,
SNDRV_PCM_STREAM_PLAYBACK);
aud_drv_data->mm2s_irq = platform_get_irq_byname(pdev,
"irq_mm2s");
if (aud_drv_data->mm2s_irq < 0) {
ret = aud_drv_data->mm2s_irq;
goto clk_err;
}
ret = devm_request_irq(dev, aud_drv_data->mm2s_irq,
xlnx_mm2s_irq_handler, 0,
"xlnx_formatter_pcm_mm2s_irq", dev);
if (ret) {
dev_err(dev, "xlnx audio mm2s irq request failed\n");
goto clk_err;
}
}
if (val & AUD_CFG_S2MM_MASK) {
aud_drv_data->s2mm_presence = true;
ret = xlnx_formatter_pcm_reset(aud_drv_data->mmio +
XLNX_S2MM_OFFSET);
if (ret) {
dev_err(dev, "audio formatter reset failed\n");
goto clk_err;
}
xlnx_formatter_disable_irqs(aud_drv_data->mmio +
XLNX_S2MM_OFFSET,
SNDRV_PCM_STREAM_CAPTURE);
aud_drv_data->s2mm_irq = platform_get_irq_byname(pdev,
"irq_s2mm");
if (aud_drv_data->s2mm_irq < 0) {
ret = aud_drv_data->s2mm_irq;
goto clk_err;
}
ret = devm_request_irq(dev, aud_drv_data->s2mm_irq,
xlnx_s2mm_irq_handler, 0,
"xlnx_formatter_pcm_s2mm_irq",
dev);
if (ret) {
dev_err(dev, "xlnx audio s2mm irq request failed\n");
goto clk_err;
}
}
dev_set_drvdata(dev, aud_drv_data);
ret = devm_snd_soc_register_component(dev, &xlnx_asoc_component,
NULL, 0);
if (ret) {
dev_err(dev, "pcm platform device register failed\n");
goto clk_err;
}
return 0;
clk_err:
clk_disable_unprepare(aud_drv_data->axi_clk);
return ret;
}
static void xlnx_formatter_pcm_remove(struct platform_device *pdev)
{
int ret = 0;
struct xlnx_pcm_drv_data *adata = dev_get_drvdata(&pdev->dev);
if (adata->s2mm_presence)
ret = xlnx_formatter_pcm_reset(adata->mmio + XLNX_S2MM_OFFSET);
/* Try MM2S reset, even if S2MM reset fails */
if (adata->mm2s_presence)
ret = xlnx_formatter_pcm_reset(adata->mmio + XLNX_MM2S_OFFSET);
if (ret)
dev_err(&pdev->dev, "audio formatter reset failed\n");
clk_disable_unprepare(adata->axi_clk);
}
static const struct of_device_id xlnx_formatter_pcm_of_match[] = {
{ .compatible = "xlnx,audio-formatter-1.0"},
{},
};
MODULE_DEVICE_TABLE(of, xlnx_formatter_pcm_of_match);
static struct platform_driver xlnx_formatter_pcm_driver = {
.probe = xlnx_formatter_pcm_probe,
.remove_new = xlnx_formatter_pcm_remove,
.driver = {
.name = DRV_NAME,
.of_match_table = xlnx_formatter_pcm_of_match,
},
};
module_platform_driver(xlnx_formatter_pcm_driver);
MODULE_AUTHOR("Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com>");
MODULE_LICENSE("GPL v2");
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