// SPDX-License-Identifier: GPL-2.0-only
/* sound/soc/rockchip/rockchip_i2s.c
*
* ALSA SoC Audio Layer - Rockchip I2S Controller driver
*
* Copyright (c) 2014 Rockchip Electronics Co. Ltd.
* Author: Jianqun <[email protected]>
*/
#include <linux/module.h>
#include <linux/mfd/syscon.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/spinlock.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include "rockchip_i2s.h"
#define DRV_NAME "rockchip-i2s"
struct rk_i2s_pins {
u32 reg_offset;
u32 shift;
};
struct rk_i2s_dev {
struct device *dev;
struct clk *hclk;
struct clk *mclk;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
struct regmap *regmap;
struct regmap *grf;
bool has_capture;
bool has_playback;
/*
* Used to indicate the tx/rx status.
* I2S controller hopes to start the tx and rx together,
* also to stop them when they are both try to stop.
*/
bool tx_start;
bool rx_start;
bool is_master_mode;
const struct rk_i2s_pins *pins;
unsigned int bclk_ratio;
spinlock_t lock; /* tx/rx lock */
struct pinctrl *pinctrl;
struct pinctrl_state *bclk_on;
struct pinctrl_state *bclk_off;
};
static int i2s_pinctrl_select_bclk_on(struct rk_i2s_dev *i2s)
{
int ret = 0;
if (!IS_ERR(i2s->pinctrl) && !IS_ERR_OR_NULL(i2s->bclk_on))
ret = pinctrl_select_state(i2s->pinctrl, i2s->bclk_on);
if (ret)
dev_err(i2s->dev, "bclk enable failed %d\n", ret);
return ret;
}
static int i2s_pinctrl_select_bclk_off(struct rk_i2s_dev *i2s)
{
int ret = 0;
if (!IS_ERR(i2s->pinctrl) && !IS_ERR_OR_NULL(i2s->bclk_off))
ret = pinctrl_select_state(i2s->pinctrl, i2s->bclk_off);
if (ret)
dev_err(i2s->dev, "bclk disable failed %d\n", ret);
return ret;
}
static int i2s_runtime_suspend(struct device *dev)
{
struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
regcache_cache_only(i2s->regmap, true);
clk_disable_unprepare(i2s->mclk);
return 0;
}
static int i2s_runtime_resume(struct device *dev)
{
struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(i2s->mclk);
if (ret) {
dev_err(i2s->dev, "clock enable failed %d\n", ret);
return ret;
}
regcache_cache_only(i2s->regmap, false);
regcache_mark_dirty(i2s->regmap);
ret = regcache_sync(i2s->regmap);
if (ret)
clk_disable_unprepare(i2s->mclk);
return ret;
}
static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai)
{
return snd_soc_dai_get_drvdata(dai);
}
static int rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
{
unsigned int val = 0;
int ret = 0;
spin_lock(&i2s->lock);
if (on) {
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_TDE_ENABLE,
I2S_DMACR_TDE_ENABLE);
if (ret < 0)
goto end;
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_START | I2S_XFER_RXS_START);
if (ret < 0)
goto end;
i2s->tx_start = true;
} else {
i2s->tx_start = false;
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_TDE_ENABLE,
I2S_DMACR_TDE_DISABLE);
if (ret < 0)
goto end;
if (!i2s->rx_start) {
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
if (ret < 0)
goto end;
udelay(150);
ret = regmap_update_bits(i2s->regmap, I2S_CLR,
I2S_CLR_TXC | I2S_CLR_RXC,
I2S_CLR_TXC | I2S_CLR_RXC);
if (ret < 0)
goto end;
ret = regmap_read_poll_timeout_atomic(i2s->regmap,
I2S_CLR,
val,
val == 0,
20,
200);
if (ret < 0)
dev_warn(i2s->dev, "fail to clear: %d\n", ret);
}
}
end:
spin_unlock(&i2s->lock);
if (ret < 0)
dev_err(i2s->dev, "lrclk update failed\n");
return ret;
}
static int rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
{
unsigned int val = 0;
int ret = 0;
spin_lock(&i2s->lock);
if (on) {
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_RDE_ENABLE,
I2S_DMACR_RDE_ENABLE);
if (ret < 0)
goto end;
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_START | I2S_XFER_RXS_START);
if (ret < 0)
goto end;
i2s->rx_start = true;
} else {
i2s->rx_start = false;
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_RDE_ENABLE,
I2S_DMACR_RDE_DISABLE);
if (ret < 0)
goto end;
if (!i2s->tx_start) {
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
if (ret < 0)
goto end;
udelay(150);
ret = regmap_update_bits(i2s->regmap, I2S_CLR,
I2S_CLR_TXC | I2S_CLR_RXC,
I2S_CLR_TXC | I2S_CLR_RXC);
if (ret < 0)
goto end;
ret = regmap_read_poll_timeout_atomic(i2s->regmap,
I2S_CLR,
val,
val == 0,
20,
200);
if (ret < 0)
dev_warn(i2s->dev, "fail to clear: %d\n", ret);
}
}
end:
spin_unlock(&i2s->lock);
if (ret < 0)
dev_err(i2s->dev, "lrclk update failed\n");
return ret;
}
static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct rk_i2s_dev *i2s = to_info(cpu_dai);
unsigned int mask = 0, val = 0;
int ret = 0;
pm_runtime_get_sync(cpu_dai->dev);
mask = I2S_CKR_MSS_MASK;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_BP_FP:
/* Set source clock in Master mode */
val = I2S_CKR_MSS_MASTER;
i2s->is_master_mode = true;
break;
case SND_SOC_DAIFMT_BC_FC:
val = I2S_CKR_MSS_SLAVE;
i2s->is_master_mode = false;
break;
default:
ret = -EINVAL;
goto err_pm_put;
}
regmap_update_bits(i2s->regmap, I2S_CKR, mask, val);
mask = I2S_CKR_CKP_MASK | I2S_CKR_TLP_MASK | I2S_CKR_RLP_MASK;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
val = I2S_CKR_CKP_NORMAL |
I2S_CKR_TLP_NORMAL |
I2S_CKR_RLP_NORMAL;
break;
case SND_SOC_DAIFMT_NB_IF:
val = I2S_CKR_CKP_NORMAL |
I2S_CKR_TLP_INVERTED |
I2S_CKR_RLP_INVERTED;
break;
case SND_SOC_DAIFMT_IB_NF:
val = I2S_CKR_CKP_INVERTED |
I2S_CKR_TLP_NORMAL |
I2S_CKR_RLP_NORMAL;
break;
case SND_SOC_DAIFMT_IB_IF:
val = I2S_CKR_CKP_INVERTED |
I2S_CKR_TLP_INVERTED |
I2S_CKR_RLP_INVERTED;
break;
default:
ret = -EINVAL;
goto err_pm_put;
}
regmap_update_bits(i2s->regmap, I2S_CKR, mask, val);
mask = I2S_TXCR_IBM_MASK | I2S_TXCR_TFS_MASK | I2S_TXCR_PBM_MASK;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
val = I2S_TXCR_IBM_RSJM;
break;
case SND_SOC_DAIFMT_LEFT_J:
val = I2S_TXCR_IBM_LSJM;
break;
case SND_SOC_DAIFMT_I2S:
val = I2S_TXCR_IBM_NORMAL;
break;
case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 bit mode */
val = I2S_TXCR_TFS_PCM | I2S_TXCR_PBM_MODE(1);
break;
case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
val = I2S_TXCR_TFS_PCM;
break;
default:
ret = -EINVAL;
goto err_pm_put;
}
regmap_update_bits(i2s->regmap, I2S_TXCR, mask, val);
mask = I2S_RXCR_IBM_MASK | I2S_RXCR_TFS_MASK | I2S_RXCR_PBM_MASK;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
val = I2S_RXCR_IBM_RSJM;
break;
case SND_SOC_DAIFMT_LEFT_J:
val = I2S_RXCR_IBM_LSJM;
break;
case SND_SOC_DAIFMT_I2S:
val = I2S_RXCR_IBM_NORMAL;
break;
case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 bit mode */
val = I2S_RXCR_TFS_PCM | I2S_RXCR_PBM_MODE(1);
break;
case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
val = I2S_RXCR_TFS_PCM;
break;
default:
ret = -EINVAL;
goto err_pm_put;
}
regmap_update_bits(i2s->regmap, I2S_RXCR, mask, val);
err_pm_put:
pm_runtime_put(cpu_dai->dev);
return ret;
}
static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct rk_i2s_dev *i2s = to_info(dai);
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
unsigned int val = 0;
unsigned int mclk_rate, bclk_rate, div_bclk, div_lrck;
if (i2s->is_master_mode) {
mclk_rate = clk_get_rate(i2s->mclk);
bclk_rate = i2s->bclk_ratio * params_rate(params);
if (!bclk_rate)
return -EINVAL;
div_bclk = DIV_ROUND_CLOSEST(mclk_rate, bclk_rate);
div_lrck = bclk_rate / params_rate(params);
regmap_update_bits(i2s->regmap, I2S_CKR,
I2S_CKR_MDIV_MASK,
I2S_CKR_MDIV(div_bclk));
regmap_update_bits(i2s->regmap, I2S_CKR,
I2S_CKR_TSD_MASK |
I2S_CKR_RSD_MASK,
I2S_CKR_TSD(div_lrck) |
I2S_CKR_RSD(div_lrck));
}
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
val |= I2S_TXCR_VDW(8);
break;
case SNDRV_PCM_FORMAT_S16_LE:
val |= I2S_TXCR_VDW(16);
break;
case SNDRV_PCM_FORMAT_S20_3LE:
val |= I2S_TXCR_VDW(20);
break;
case SNDRV_PCM_FORMAT_S24_LE:
val |= I2S_TXCR_VDW(24);
break;
case SNDRV_PCM_FORMAT_S32_LE:
val |= I2S_TXCR_VDW(32);
break;
default:
return -EINVAL;
}
switch (params_channels(params)) {
case 8:
val |= I2S_CHN_8;
break;
case 6:
val |= I2S_CHN_6;
break;
case 4:
val |= I2S_CHN_4;
break;
case 2:
val |= I2S_CHN_2;
break;
default:
dev_err(i2s->dev, "invalid channel: %d\n",
params_channels(params));
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
regmap_update_bits(i2s->regmap, I2S_RXCR,
I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
val);
else
regmap_update_bits(i2s->regmap, I2S_TXCR,
I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
val);
if (!IS_ERR(i2s->grf) && i2s->pins) {
regmap_read(i2s->regmap, I2S_TXCR, &val);
val &= I2S_TXCR_CSR_MASK;
switch (val) {
case I2S_CHN_4:
val = I2S_IO_4CH_OUT_6CH_IN;
break;
case I2S_CHN_6:
val = I2S_IO_6CH_OUT_4CH_IN;
break;
case I2S_CHN_8:
val = I2S_IO_8CH_OUT_2CH_IN;
break;
default:
val = I2S_IO_2CH_OUT_8CH_IN;
break;
}
val <<= i2s->pins->shift;
val |= (I2S_IO_DIRECTION_MASK << i2s->pins->shift) << 16;
regmap_write(i2s->grf, i2s->pins->reg_offset, val);
}
regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
I2S_DMACR_TDL(16));
regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
I2S_DMACR_RDL(16));
val = I2S_CKR_TRCM_TXRX;
if (dai->driver->symmetric_rate && rtd->dai_link->symmetric_rate)
val = I2S_CKR_TRCM_TXONLY;
regmap_update_bits(i2s->regmap, I2S_CKR,
I2S_CKR_TRCM_MASK,
val);
return 0;
}
static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct rk_i2s_dev *i2s = 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)
ret = rockchip_snd_rxctrl(i2s, 1);
else
ret = rockchip_snd_txctrl(i2s, 1);
if (ret < 0)
return ret;
i2s_pinctrl_select_bclk_on(i2s);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
if (!i2s->tx_start)
i2s_pinctrl_select_bclk_off(i2s);
ret = rockchip_snd_rxctrl(i2s, 0);
} else {
if (!i2s->rx_start)
i2s_pinctrl_select_bclk_off(i2s);
ret = rockchip_snd_txctrl(i2s, 0);
}
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int rockchip_i2s_set_bclk_ratio(struct snd_soc_dai *dai,
unsigned int ratio)
{
struct rk_i2s_dev *i2s = to_info(dai);
i2s->bclk_ratio = ratio;
return 0;
}
static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
unsigned int freq, int dir)
{
struct rk_i2s_dev *i2s = to_info(cpu_dai);
int ret;
if (freq == 0)
return 0;
ret = clk_set_rate(i2s->mclk, freq);
if (ret)
dev_err(i2s->dev, "Fail to set mclk %d\n", ret);
return ret;
}
static int rockchip_i2s_dai_probe(struct snd_soc_dai *dai)
{
struct rk_i2s_dev *i2s = snd_soc_dai_get_drvdata(dai);
snd_soc_dai_init_dma_data(dai,
i2s->has_playback ? &i2s->playback_dma_data : NULL,
i2s->has_capture ? &i2s->capture_dma_data : NULL);
return 0;
}
static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
.probe = rockchip_i2s_dai_probe,
.hw_params = rockchip_i2s_hw_params,
.set_bclk_ratio = rockchip_i2s_set_bclk_ratio,
.set_sysclk = rockchip_i2s_set_sysclk,
.set_fmt = rockchip_i2s_set_fmt,
.trigger = rockchip_i2s_trigger,
};
static struct snd_soc_dai_driver rockchip_i2s_dai = {
.ops = &rockchip_i2s_dai_ops,
.symmetric_rate = 1,
};
static const struct snd_soc_component_driver rockchip_i2s_component = {
.name = DRV_NAME,
.legacy_dai_naming = 1,
};
static bool rockchip_i2s_wr_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case I2S_TXCR:
case I2S_RXCR:
case I2S_CKR:
case I2S_DMACR:
case I2S_INTCR:
case I2S_XFER:
case I2S_CLR:
case I2S_TXDR:
return true;
default:
return false;
}
}
static bool rockchip_i2s_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case I2S_TXCR:
case I2S_RXCR:
case I2S_CKR:
case I2S_DMACR:
case I2S_INTCR:
case I2S_XFER:
case I2S_CLR:
case I2S_TXDR:
case I2S_RXDR:
case I2S_FIFOLR:
case I2S_INTSR:
return true;
default:
return false;
}
}
static bool rockchip_i2s_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case I2S_INTSR:
case I2S_CLR:
case I2S_FIFOLR:
case I2S_TXDR:
case I2S_RXDR:
return true;
default:
return false;
}
}
static bool rockchip_i2s_precious_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case I2S_RXDR:
return true;
default:
return false;
}
}
static const struct reg_default rockchip_i2s_reg_defaults[] = {
{0x00, 0x0000000f},
{0x04, 0x0000000f},
{0x08, 0x00071f1f},
{0x10, 0x001f0000},
{0x14, 0x01f00000},
};
static const struct regmap_config rockchip_i2s_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = I2S_RXDR,
.reg_defaults = rockchip_i2s_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(rockchip_i2s_reg_defaults),
.writeable_reg = rockchip_i2s_wr_reg,
.readable_reg = rockchip_i2s_rd_reg,
.volatile_reg = rockchip_i2s_volatile_reg,
.precious_reg = rockchip_i2s_precious_reg,
.cache_type = REGCACHE_FLAT,
};
static const struct rk_i2s_pins rk3399_i2s_pins = {
.reg_offset = 0xe220,
.shift = 11,
};
static const struct of_device_id rockchip_i2s_match[] __maybe_unused = {
{ .compatible = "rockchip,px30-i2s", },
{ .compatible = "rockchip,rk1808-i2s", },
{ .compatible = "rockchip,rk3036-i2s", },
{ .compatible = "rockchip,rk3066-i2s", },
{ .compatible = "rockchip,rk3128-i2s", },
{ .compatible = "rockchip,rk3188-i2s", },
{ .compatible = "rockchip,rk3228-i2s", },
{ .compatible = "rockchip,rk3288-i2s", },
{ .compatible = "rockchip,rk3308-i2s", },
{ .compatible = "rockchip,rk3328-i2s", },
{ .compatible = "rockchip,rk3366-i2s", },
{ .compatible = "rockchip,rk3368-i2s", },
{ .compatible = "rockchip,rk3399-i2s", .data = &rk3399_i2s_pins },
{ .compatible = "rockchip,rk3588-i2s", },
{ .compatible = "rockchip,rv1126-i2s", },
{},
};
static int rockchip_i2s_init_dai(struct rk_i2s_dev *i2s, struct resource *res,
struct snd_soc_dai_driver **dp)
{
struct device_node *node = i2s->dev->of_node;
struct snd_soc_dai_driver *dai;
struct property *dma_names;
const char *dma_name;
unsigned int val;
of_property_for_each_string(node, "dma-names", dma_names, dma_name) {
if (!strcmp(dma_name, "tx"))
i2s->has_playback = true;
if (!strcmp(dma_name, "rx"))
i2s->has_capture = true;
}
dai = devm_kmemdup(i2s->dev, &rockchip_i2s_dai,
sizeof(*dai), GFP_KERNEL);
if (!dai)
return -ENOMEM;
if (i2s->has_playback) {
dai->playback.stream_name = "Playback";
dai->playback.channels_min = 2;
dai->playback.channels_max = 8;
dai->playback.rates = SNDRV_PCM_RATE_8000_192000;
dai->playback.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE;
i2s->playback_dma_data.addr = res->start + I2S_TXDR;
i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
i2s->playback_dma_data.maxburst = 8;
if (!of_property_read_u32(node, "rockchip,playback-channels", &val)) {
if (val >= 2 && val <= 8)
dai->playback.channels_max = val;
}
}
if (i2s->has_capture) {
dai->capture.stream_name = "Capture";
dai->capture.channels_min = 2;
dai->capture.channels_max = 8;
dai->capture.rates = SNDRV_PCM_RATE_8000_192000;
dai->capture.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE;
i2s->capture_dma_data.addr = res->start + I2S_RXDR;
i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
i2s->capture_dma_data.maxburst = 8;
if (!of_property_read_u32(node, "rockchip,capture-channels", &val)) {
if (val >= 2 && val <= 8)
dai->capture.channels_max = val;
}
}
if (dp)
*dp = dai;
return 0;
}
static int rockchip_i2s_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct rk_i2s_dev *i2s;
struct snd_soc_dai_driver *dai;
struct resource *res;
void __iomem *regs;
int ret;
i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
if (!i2s)
return -ENOMEM;
spin_lock_init(&i2s->lock);
i2s->dev = &pdev->dev;
i2s->grf = syscon_regmap_lookup_by_phandle(node, "rockchip,grf");
if (!IS_ERR(i2s->grf)) {
i2s->pins = device_get_match_data(&pdev->dev);
if (!i2s->pins)
return -EINVAL;
}
/* try to prepare related clocks */
i2s->hclk = devm_clk_get(&pdev->dev, "i2s_hclk");
if (IS_ERR(i2s->hclk)) {
dev_err(&pdev->dev, "Can't retrieve i2s bus clock\n");
return PTR_ERR(i2s->hclk);
}
ret = clk_prepare_enable(i2s->hclk);
if (ret) {
dev_err(i2s->dev, "hclock enable failed %d\n", ret);
return ret;
}
i2s->mclk = devm_clk_get(&pdev->dev, "i2s_clk");
if (IS_ERR(i2s->mclk)) {
dev_err(&pdev->dev, "Can't retrieve i2s master clock\n");
ret = PTR_ERR(i2s->mclk);
goto err_clk;
}
regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(regs)) {
ret = PTR_ERR(regs);
goto err_clk;
}
i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
&rockchip_i2s_regmap_config);
if (IS_ERR(i2s->regmap)) {
dev_err(&pdev->dev,
"Failed to initialise managed register map\n");
ret = PTR_ERR(i2s->regmap);
goto err_clk;
}
i2s->bclk_ratio = 64;
i2s->pinctrl = devm_pinctrl_get(&pdev->dev);
if (!IS_ERR(i2s->pinctrl)) {
i2s->bclk_on = pinctrl_lookup_state(i2s->pinctrl, "bclk_on");
if (!IS_ERR_OR_NULL(i2s->bclk_on)) {
i2s->bclk_off = pinctrl_lookup_state(i2s->pinctrl, "bclk_off");
if (IS_ERR_OR_NULL(i2s->bclk_off)) {
dev_err(&pdev->dev, "failed to find i2s bclk_off\n");
ret = -EINVAL;
goto err_clk;
}
}
} else {
dev_dbg(&pdev->dev, "failed to find i2s pinctrl\n");
}
i2s_pinctrl_select_bclk_off(i2s);
dev_set_drvdata(&pdev->dev, i2s);
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = i2s_runtime_resume(&pdev->dev);
if (ret)
goto err_pm_disable;
}
ret = rockchip_i2s_init_dai(i2s, res, &dai);
if (ret)
goto err_pm_disable;
ret = devm_snd_soc_register_component(&pdev->dev,
&rockchip_i2s_component,
dai, 1);
if (ret) {
dev_err(&pdev->dev, "Could not register DAI\n");
goto err_suspend;
}
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
if (ret) {
dev_err(&pdev->dev, "Could not register PCM\n");
goto err_suspend;
}
return 0;
err_suspend:
if (!pm_runtime_status_suspended(&pdev->dev))
i2s_runtime_suspend(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
err_clk:
clk_disable_unprepare(i2s->hclk);
return ret;
}
static void rockchip_i2s_remove(struct platform_device *pdev)
{
struct rk_i2s_dev *i2s = dev_get_drvdata(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
i2s_runtime_suspend(&pdev->dev);
clk_disable_unprepare(i2s->hclk);
}
static const struct dev_pm_ops rockchip_i2s_pm_ops = {
SET_RUNTIME_PM_OPS(i2s_runtime_suspend, i2s_runtime_resume,
NULL)
};
static struct platform_driver rockchip_i2s_driver = {
.probe = rockchip_i2s_probe,
.remove = rockchip_i2s_remove,
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(rockchip_i2s_match),
.pm = &rockchip_i2s_pm_ops,
},
};
module_platform_driver(rockchip_i2s_driver);
MODULE_DESCRIPTION("ROCKCHIP IIS ASoC Interface");
MODULE_AUTHOR("jianqun <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, rockchip_i2s_match);
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