724 lines
16 KiB
C
724 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Rockchip PDM ALSA SoC Digital Audio Interface(DAI) driver
|
|
*
|
|
* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/rational.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/reset.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
|
|
#include "rockchip_pdm.h"
|
|
|
|
#define PDM_DMA_BURST_SIZE (8) /* size * width: 8*4 = 32 bytes */
|
|
#define PDM_SIGNOFF_CLK_RATE (100000000)
|
|
#define PDM_PATH_MAX (4)
|
|
|
|
enum rk_pdm_version {
|
|
RK_PDM_RK3229,
|
|
RK_PDM_RK3308,
|
|
RK_PDM_RV1126,
|
|
};
|
|
|
|
struct rk_pdm_dev {
|
|
struct device *dev;
|
|
struct clk *clk;
|
|
struct clk *hclk;
|
|
struct regmap *regmap;
|
|
struct snd_dmaengine_dai_dma_data capture_dma_data;
|
|
struct reset_control *reset;
|
|
enum rk_pdm_version version;
|
|
};
|
|
|
|
struct rk_pdm_clkref {
|
|
unsigned int sr;
|
|
unsigned int clk;
|
|
unsigned int clk_out;
|
|
};
|
|
|
|
struct rk_pdm_ds_ratio {
|
|
unsigned int ratio;
|
|
unsigned int sr;
|
|
};
|
|
|
|
static struct rk_pdm_clkref clkref[] = {
|
|
{ 8000, 40960000, 2048000 },
|
|
{ 11025, 56448000, 2822400 },
|
|
{ 12000, 61440000, 3072000 },
|
|
{ 8000, 98304000, 2048000 },
|
|
{ 12000, 98304000, 3072000 },
|
|
};
|
|
|
|
static struct rk_pdm_ds_ratio ds_ratio[] = {
|
|
{ 0, 192000 },
|
|
{ 0, 176400 },
|
|
{ 0, 128000 },
|
|
{ 1, 96000 },
|
|
{ 1, 88200 },
|
|
{ 1, 64000 },
|
|
{ 2, 48000 },
|
|
{ 2, 44100 },
|
|
{ 2, 32000 },
|
|
{ 3, 24000 },
|
|
{ 3, 22050 },
|
|
{ 3, 16000 },
|
|
{ 4, 12000 },
|
|
{ 4, 11025 },
|
|
{ 4, 8000 },
|
|
};
|
|
|
|
static unsigned int get_pdm_clk(struct rk_pdm_dev *pdm, unsigned int sr,
|
|
unsigned int *clk_src, unsigned int *clk_out)
|
|
{
|
|
unsigned int i, count, clk, div, rate;
|
|
|
|
clk = 0;
|
|
if (!sr)
|
|
return clk;
|
|
|
|
count = ARRAY_SIZE(clkref);
|
|
for (i = 0; i < count; i++) {
|
|
if (sr % clkref[i].sr)
|
|
continue;
|
|
div = sr / clkref[i].sr;
|
|
if ((div & (div - 1)) == 0) {
|
|
*clk_out = clkref[i].clk_out;
|
|
rate = clk_round_rate(pdm->clk, clkref[i].clk);
|
|
if (rate != clkref[i].clk)
|
|
continue;
|
|
clk = clkref[i].clk;
|
|
*clk_src = clkref[i].clk;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!clk) {
|
|
clk = clk_round_rate(pdm->clk, PDM_SIGNOFF_CLK_RATE);
|
|
*clk_src = clk;
|
|
}
|
|
return clk;
|
|
}
|
|
|
|
static unsigned int get_pdm_ds_ratio(unsigned int sr)
|
|
{
|
|
unsigned int i, count, ratio;
|
|
|
|
ratio = 0;
|
|
if (!sr)
|
|
return ratio;
|
|
|
|
count = ARRAY_SIZE(ds_ratio);
|
|
for (i = 0; i < count; i++) {
|
|
if (sr == ds_ratio[i].sr)
|
|
ratio = ds_ratio[i].ratio;
|
|
}
|
|
return ratio;
|
|
}
|
|
|
|
static unsigned int get_pdm_cic_ratio(unsigned int clk)
|
|
{
|
|
switch (clk) {
|
|
case 4096000:
|
|
case 5644800:
|
|
case 6144000:
|
|
return 0;
|
|
case 2048000:
|
|
case 2822400:
|
|
case 3072000:
|
|
return 1;
|
|
case 1024000:
|
|
case 1411200:
|
|
case 1536000:
|
|
return 2;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static unsigned int samplerate_to_bit(unsigned int samplerate)
|
|
{
|
|
switch (samplerate) {
|
|
case 8000:
|
|
case 11025:
|
|
case 12000:
|
|
return 0;
|
|
case 16000:
|
|
case 22050:
|
|
case 24000:
|
|
return 1;
|
|
case 32000:
|
|
return 2;
|
|
case 44100:
|
|
case 48000:
|
|
return 3;
|
|
case 64000:
|
|
case 88200:
|
|
case 96000:
|
|
return 4;
|
|
case 128000:
|
|
case 176400:
|
|
case 192000:
|
|
return 5;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static inline struct rk_pdm_dev *to_info(struct snd_soc_dai *dai)
|
|
{
|
|
return snd_soc_dai_get_drvdata(dai);
|
|
}
|
|
|
|
static void rockchip_pdm_rxctrl(struct rk_pdm_dev *pdm, int on)
|
|
{
|
|
if (on) {
|
|
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL,
|
|
PDM_DMA_RD_MSK, PDM_DMA_RD_EN);
|
|
regmap_update_bits(pdm->regmap, PDM_SYSCONFIG,
|
|
PDM_RX_MASK, PDM_RX_START);
|
|
} else {
|
|
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL,
|
|
PDM_DMA_RD_MSK, PDM_DMA_RD_DIS);
|
|
regmap_update_bits(pdm->regmap, PDM_SYSCONFIG,
|
|
PDM_RX_MASK | PDM_RX_CLR_MASK,
|
|
PDM_RX_STOP | PDM_RX_CLR_WR);
|
|
}
|
|
}
|
|
|
|
static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct rk_pdm_dev *pdm = to_info(dai);
|
|
unsigned int val = 0;
|
|
unsigned int clk_rate, clk_div, samplerate;
|
|
unsigned int clk_src, clk_out = 0;
|
|
unsigned long m, n;
|
|
bool change;
|
|
int ret;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
return 0;
|
|
|
|
samplerate = params_rate(params);
|
|
clk_rate = get_pdm_clk(pdm, samplerate, &clk_src, &clk_out);
|
|
if (!clk_rate)
|
|
return -EINVAL;
|
|
|
|
ret = clk_set_rate(pdm->clk, clk_src);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
if (pdm->version == RK_PDM_RK3308 ||
|
|
pdm->version == RK_PDM_RV1126) {
|
|
rational_best_approximation(clk_out, clk_src,
|
|
GENMASK(16 - 1, 0),
|
|
GENMASK(16 - 1, 0),
|
|
&m, &n);
|
|
|
|
val = (m << PDM_FD_NUMERATOR_SFT) |
|
|
(n << PDM_FD_DENOMINATOR_SFT);
|
|
regmap_update_bits_check(pdm->regmap, PDM_CTRL1,
|
|
PDM_FD_NUMERATOR_MSK |
|
|
PDM_FD_DENOMINATOR_MSK,
|
|
val, &change);
|
|
if (change) {
|
|
reset_control_assert(pdm->reset);
|
|
reset_control_deassert(pdm->reset);
|
|
rockchip_pdm_rxctrl(pdm, 0);
|
|
}
|
|
clk_div = n / m;
|
|
if (clk_div >= 40)
|
|
val = PDM_CLK_FD_RATIO_40;
|
|
else if (clk_div <= 35)
|
|
val = PDM_CLK_FD_RATIO_35;
|
|
else
|
|
return -EINVAL;
|
|
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL,
|
|
PDM_CLK_FD_RATIO_MSK,
|
|
val);
|
|
}
|
|
|
|
if (pdm->version == RK_PDM_RV1126) {
|
|
val = get_pdm_cic_ratio(clk_out);
|
|
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_CIC_RATIO_MSK, val);
|
|
val = samplerate_to_bit(samplerate);
|
|
regmap_update_bits(pdm->regmap, PDM_CTRL0,
|
|
PDM_SAMPLERATE_MSK, PDM_SAMPLERATE(val));
|
|
} else {
|
|
val = get_pdm_ds_ratio(samplerate);
|
|
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_DS_RATIO_MSK, val);
|
|
}
|
|
|
|
regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
|
|
PDM_HPF_CF_MSK, PDM_HPF_60HZ);
|
|
regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
|
|
PDM_HPF_LE | PDM_HPF_RE, PDM_HPF_LE | PDM_HPF_RE);
|
|
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_CLK_EN, PDM_CLK_EN);
|
|
if (pdm->version != RK_PDM_RK3229)
|
|
regmap_update_bits(pdm->regmap, PDM_CTRL0,
|
|
PDM_MODE_MSK, PDM_MODE_LJ);
|
|
|
|
val = 0;
|
|
switch (params_format(params)) {
|
|
case SNDRV_PCM_FORMAT_S8:
|
|
val |= PDM_VDW(8);
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S16_LE:
|
|
val |= PDM_VDW(16);
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S20_3LE:
|
|
val |= PDM_VDW(20);
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S24_LE:
|
|
val |= PDM_VDW(24);
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S32_LE:
|
|
val |= PDM_VDW(32);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (params_channels(params)) {
|
|
case 8:
|
|
val |= PDM_PATH3_EN;
|
|
fallthrough;
|
|
case 6:
|
|
val |= PDM_PATH2_EN;
|
|
fallthrough;
|
|
case 4:
|
|
val |= PDM_PATH1_EN;
|
|
fallthrough;
|
|
case 2:
|
|
val |= PDM_PATH0_EN;
|
|
break;
|
|
default:
|
|
dev_err(pdm->dev, "invalid channel: %d\n",
|
|
params_channels(params));
|
|
return -EINVAL;
|
|
}
|
|
|
|
regmap_update_bits(pdm->regmap, PDM_CTRL0,
|
|
PDM_PATH_MSK | PDM_VDW_MSK,
|
|
val);
|
|
/* all channels share the single FIFO */
|
|
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL, PDM_DMA_RDL_MSK,
|
|
PDM_DMA_RDL(8 * params_channels(params)));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pdm_set_fmt(struct snd_soc_dai *cpu_dai,
|
|
unsigned int fmt)
|
|
{
|
|
struct rk_pdm_dev *pdm = to_info(cpu_dai);
|
|
unsigned int mask = 0, val = 0;
|
|
|
|
mask = PDM_CKP_MSK;
|
|
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
|
|
case SND_SOC_DAIFMT_NB_NF:
|
|
val = PDM_CKP_NORMAL;
|
|
break;
|
|
case SND_SOC_DAIFMT_IB_NF:
|
|
val = PDM_CKP_INVERTED;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
pm_runtime_get_sync(cpu_dai->dev);
|
|
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, mask, val);
|
|
pm_runtime_put(cpu_dai->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pdm_trigger(struct snd_pcm_substream *substream, int cmd,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct rk_pdm_dev *pdm = to_info(dai);
|
|
int ret = 0;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
rockchip_pdm_rxctrl(pdm, 1);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
rockchip_pdm_rxctrl(pdm, 0);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rockchip_pdm_dai_probe(struct snd_soc_dai *dai)
|
|
{
|
|
struct rk_pdm_dev *pdm = to_info(dai);
|
|
|
|
snd_soc_dai_dma_data_set_capture(dai, &pdm->capture_dma_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops rockchip_pdm_dai_ops = {
|
|
.set_fmt = rockchip_pdm_set_fmt,
|
|
.trigger = rockchip_pdm_trigger,
|
|
.hw_params = rockchip_pdm_hw_params,
|
|
};
|
|
|
|
#define ROCKCHIP_PDM_RATES SNDRV_PCM_RATE_8000_192000
|
|
#define ROCKCHIP_PDM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
|
|
SNDRV_PCM_FMTBIT_S20_3LE | \
|
|
SNDRV_PCM_FMTBIT_S24_LE | \
|
|
SNDRV_PCM_FMTBIT_S32_LE)
|
|
|
|
static struct snd_soc_dai_driver rockchip_pdm_dai = {
|
|
.probe = rockchip_pdm_dai_probe,
|
|
.capture = {
|
|
.stream_name = "Capture",
|
|
.channels_min = 2,
|
|
.channels_max = 8,
|
|
.rates = ROCKCHIP_PDM_RATES,
|
|
.formats = ROCKCHIP_PDM_FORMATS,
|
|
},
|
|
.ops = &rockchip_pdm_dai_ops,
|
|
.symmetric_rate = 1,
|
|
};
|
|
|
|
static const struct snd_soc_component_driver rockchip_pdm_component = {
|
|
.name = "rockchip-pdm",
|
|
.legacy_dai_naming = 1,
|
|
};
|
|
|
|
static int rockchip_pdm_runtime_suspend(struct device *dev)
|
|
{
|
|
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
|
|
|
|
clk_disable_unprepare(pdm->clk);
|
|
clk_disable_unprepare(pdm->hclk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pdm_runtime_resume(struct device *dev)
|
|
{
|
|
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(pdm->clk);
|
|
if (ret) {
|
|
dev_err(pdm->dev, "clock enable failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = clk_prepare_enable(pdm->hclk);
|
|
if (ret) {
|
|
clk_disable_unprepare(pdm->clk);
|
|
dev_err(pdm->dev, "hclock enable failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool rockchip_pdm_wr_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case PDM_SYSCONFIG:
|
|
case PDM_CTRL0:
|
|
case PDM_CTRL1:
|
|
case PDM_CLK_CTRL:
|
|
case PDM_HPF_CTRL:
|
|
case PDM_FIFO_CTRL:
|
|
case PDM_DMA_CTRL:
|
|
case PDM_INT_EN:
|
|
case PDM_INT_CLR:
|
|
case PDM_DATA_VALID:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool rockchip_pdm_rd_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case PDM_SYSCONFIG:
|
|
case PDM_CTRL0:
|
|
case PDM_CTRL1:
|
|
case PDM_CLK_CTRL:
|
|
case PDM_HPF_CTRL:
|
|
case PDM_FIFO_CTRL:
|
|
case PDM_DMA_CTRL:
|
|
case PDM_INT_EN:
|
|
case PDM_INT_CLR:
|
|
case PDM_INT_ST:
|
|
case PDM_DATA_VALID:
|
|
case PDM_RXFIFO_DATA:
|
|
case PDM_VERSION:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool rockchip_pdm_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case PDM_SYSCONFIG:
|
|
case PDM_FIFO_CTRL:
|
|
case PDM_INT_CLR:
|
|
case PDM_INT_ST:
|
|
case PDM_RXFIFO_DATA:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool rockchip_pdm_precious_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case PDM_RXFIFO_DATA:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct reg_default rockchip_pdm_reg_defaults[] = {
|
|
{ PDM_CTRL0, 0x78000017 },
|
|
{ PDM_CTRL1, 0x0bb8ea60 },
|
|
{ PDM_CLK_CTRL, 0x0000e401 },
|
|
{ PDM_DMA_CTRL, 0x0000001f },
|
|
};
|
|
|
|
static const struct regmap_config rockchip_pdm_regmap_config = {
|
|
.reg_bits = 32,
|
|
.reg_stride = 4,
|
|
.val_bits = 32,
|
|
.max_register = PDM_VERSION,
|
|
.reg_defaults = rockchip_pdm_reg_defaults,
|
|
.num_reg_defaults = ARRAY_SIZE(rockchip_pdm_reg_defaults),
|
|
.writeable_reg = rockchip_pdm_wr_reg,
|
|
.readable_reg = rockchip_pdm_rd_reg,
|
|
.volatile_reg = rockchip_pdm_volatile_reg,
|
|
.precious_reg = rockchip_pdm_precious_reg,
|
|
.cache_type = REGCACHE_FLAT,
|
|
};
|
|
|
|
static const struct of_device_id rockchip_pdm_match[] __maybe_unused = {
|
|
{ .compatible = "rockchip,pdm",
|
|
.data = (void *)RK_PDM_RK3229 },
|
|
{ .compatible = "rockchip,px30-pdm",
|
|
.data = (void *)RK_PDM_RK3308 },
|
|
{ .compatible = "rockchip,rk1808-pdm",
|
|
.data = (void *)RK_PDM_RK3308 },
|
|
{ .compatible = "rockchip,rk3308-pdm",
|
|
.data = (void *)RK_PDM_RK3308 },
|
|
{ .compatible = "rockchip,rk3568-pdm",
|
|
.data = (void *)RK_PDM_RV1126 },
|
|
{ .compatible = "rockchip,rv1126-pdm",
|
|
.data = (void *)RK_PDM_RV1126 },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, rockchip_pdm_match);
|
|
|
|
static int rockchip_pdm_path_parse(struct rk_pdm_dev *pdm, struct device_node *node)
|
|
{
|
|
unsigned int path[PDM_PATH_MAX];
|
|
int cnt = 0, ret = 0, i = 0, val = 0, msk = 0;
|
|
|
|
cnt = of_count_phandle_with_args(node, "rockchip,path-map",
|
|
NULL);
|
|
if (cnt != PDM_PATH_MAX)
|
|
return cnt;
|
|
|
|
ret = of_property_read_u32_array(node, "rockchip,path-map",
|
|
path, cnt);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
if (path[i] >= PDM_PATH_MAX)
|
|
return -EINVAL;
|
|
msk |= PDM_PATH_MASK(i);
|
|
val |= PDM_PATH(i, path[i]);
|
|
}
|
|
|
|
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, msk, val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pdm_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *node = pdev->dev.of_node;
|
|
const struct of_device_id *match;
|
|
struct rk_pdm_dev *pdm;
|
|
struct resource *res;
|
|
void __iomem *regs;
|
|
int ret;
|
|
|
|
pdm = devm_kzalloc(&pdev->dev, sizeof(*pdm), GFP_KERNEL);
|
|
if (!pdm)
|
|
return -ENOMEM;
|
|
|
|
match = of_match_device(rockchip_pdm_match, &pdev->dev);
|
|
if (match)
|
|
pdm->version = (enum rk_pdm_version)match->data;
|
|
|
|
if (pdm->version == RK_PDM_RK3308) {
|
|
pdm->reset = devm_reset_control_get(&pdev->dev, "pdm-m");
|
|
if (IS_ERR(pdm->reset))
|
|
return PTR_ERR(pdm->reset);
|
|
}
|
|
|
|
regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
|
|
if (IS_ERR(regs))
|
|
return PTR_ERR(regs);
|
|
|
|
pdm->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
|
|
&rockchip_pdm_regmap_config);
|
|
if (IS_ERR(pdm->regmap))
|
|
return PTR_ERR(pdm->regmap);
|
|
|
|
pdm->capture_dma_data.addr = res->start + PDM_RXFIFO_DATA;
|
|
pdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
pdm->capture_dma_data.maxburst = PDM_DMA_BURST_SIZE;
|
|
|
|
pdm->dev = &pdev->dev;
|
|
dev_set_drvdata(&pdev->dev, pdm);
|
|
|
|
pdm->clk = devm_clk_get(&pdev->dev, "pdm_clk");
|
|
if (IS_ERR(pdm->clk))
|
|
return PTR_ERR(pdm->clk);
|
|
|
|
pdm->hclk = devm_clk_get(&pdev->dev, "pdm_hclk");
|
|
if (IS_ERR(pdm->hclk))
|
|
return PTR_ERR(pdm->hclk);
|
|
|
|
ret = clk_prepare_enable(pdm->hclk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
if (!pm_runtime_enabled(&pdev->dev)) {
|
|
ret = rockchip_pdm_runtime_resume(&pdev->dev);
|
|
if (ret)
|
|
goto err_pm_disable;
|
|
}
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev,
|
|
&rockchip_pdm_component,
|
|
&rockchip_pdm_dai, 1);
|
|
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "could not register dai: %d\n", ret);
|
|
goto err_suspend;
|
|
}
|
|
|
|
rockchip_pdm_rxctrl(pdm, 0);
|
|
|
|
ret = rockchip_pdm_path_parse(pdm, node);
|
|
if (ret != 0 && ret != -ENOENT)
|
|
goto err_suspend;
|
|
|
|
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "could not register pcm: %d\n", ret);
|
|
goto err_suspend;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_suspend:
|
|
if (!pm_runtime_status_suspended(&pdev->dev))
|
|
rockchip_pdm_runtime_suspend(&pdev->dev);
|
|
err_pm_disable:
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
clk_disable_unprepare(pdm->hclk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void rockchip_pdm_remove(struct platform_device *pdev)
|
|
{
|
|
struct rk_pdm_dev *pdm = dev_get_drvdata(&pdev->dev);
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
if (!pm_runtime_status_suspended(&pdev->dev))
|
|
rockchip_pdm_runtime_suspend(&pdev->dev);
|
|
|
|
clk_disable_unprepare(pdm->clk);
|
|
clk_disable_unprepare(pdm->hclk);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int rockchip_pdm_suspend(struct device *dev)
|
|
{
|
|
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
|
|
|
|
regcache_mark_dirty(pdm->regmap);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pdm_resume(struct device *dev)
|
|
{
|
|
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = pm_runtime_resume_and_get(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regcache_sync(pdm->regmap);
|
|
|
|
pm_runtime_put(dev);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops rockchip_pdm_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(rockchip_pdm_runtime_suspend,
|
|
rockchip_pdm_runtime_resume, NULL)
|
|
SET_SYSTEM_SLEEP_PM_OPS(rockchip_pdm_suspend, rockchip_pdm_resume)
|
|
};
|
|
|
|
static struct platform_driver rockchip_pdm_driver = {
|
|
.probe = rockchip_pdm_probe,
|
|
.remove_new = rockchip_pdm_remove,
|
|
.driver = {
|
|
.name = "rockchip-pdm",
|
|
.of_match_table = of_match_ptr(rockchip_pdm_match),
|
|
.pm = &rockchip_pdm_pm_ops,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(rockchip_pdm_driver);
|
|
|
|
MODULE_AUTHOR("Sugar <sugar.zhang@rock-chips.com>");
|
|
MODULE_DESCRIPTION("Rockchip PDM Controller Driver");
|
|
MODULE_LICENSE("GPL v2");
|