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linux-zen-desktop/sound/soc/rockchip/rockchip_i2s_tdm.c

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Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: GPL-2.0-only
// ALSA SoC Audio Layer - Rockchip I2S/TDM Controller driver
// Copyright (c) 2018 Rockchip Electronics Co. Ltd.
// Author: Sugar Zhang <sugar.zhang@rock-chips.com>
// Author: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/spinlock.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
#include "rockchip_i2s_tdm.h"
#define DRV_NAME "rockchip-i2s-tdm"
#define DEFAULT_MCLK_FS 256
#define CH_GRP_MAX 4 /* The max channel 8 / 2 */
#define MULTIPLEX_CH_MAX 10
#define CLK_PPM_MIN -1000
#define CLK_PPM_MAX 1000
#define TRCM_TXRX 0
#define TRCM_TX 1
#define TRCM_RX 2
struct txrx_config {
u32 addr;
u32 reg;
u32 txonly;
u32 rxonly;
};
struct rk_i2s_soc_data {
u32 softrst_offset;
u32 grf_reg_offset;
u32 grf_shift;
int config_count;
const struct txrx_config *configs;
int (*init)(struct device *dev, u32 addr);
};
struct rk_i2s_tdm_dev {
struct device *dev;
struct clk *hclk;
struct clk *mclk_tx;
struct clk *mclk_rx;
/* The mclk_tx_src is parent of mclk_tx */
struct clk *mclk_tx_src;
/* The mclk_rx_src is parent of mclk_rx */
struct clk *mclk_rx_src;
/*
* The mclk_root0 and mclk_root1 are root parent and supplies for
* the different FS.
*
* e.g:
* mclk_root0 is VPLL0, used for FS=48000Hz
* mclk_root1 is VPLL1, used for FS=44100Hz
*/
struct clk *mclk_root0;
struct clk *mclk_root1;
struct regmap *regmap;
struct regmap *grf;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
struct reset_control *tx_reset;
struct reset_control *rx_reset;
struct rk_i2s_soc_data *soc_data;
bool is_master_mode;
bool io_multiplex;
bool mclk_calibrate;
bool tdm_mode;
unsigned int mclk_rx_freq;
unsigned int mclk_tx_freq;
unsigned int mclk_root0_freq;
unsigned int mclk_root1_freq;
unsigned int mclk_root0_initial_freq;
unsigned int mclk_root1_initial_freq;
unsigned int frame_width;
unsigned int clk_trcm;
unsigned int i2s_sdis[CH_GRP_MAX];
unsigned int i2s_sdos[CH_GRP_MAX];
int clk_ppm;
int refcount;
spinlock_t lock; /* xfer lock */
bool has_playback;
bool has_capture;
struct snd_soc_dai_driver *dai;
};
static int to_ch_num(unsigned int val)
{
switch (val) {
case I2S_CHN_4:
return 4;
case I2S_CHN_6:
return 6;
case I2S_CHN_8:
return 8;
default:
return 2;
}
}
static void i2s_tdm_disable_unprepare_mclk(struct rk_i2s_tdm_dev *i2s_tdm)
{
clk_disable_unprepare(i2s_tdm->mclk_tx);
clk_disable_unprepare(i2s_tdm->mclk_rx);
if (i2s_tdm->mclk_calibrate) {
clk_disable_unprepare(i2s_tdm->mclk_tx_src);
clk_disable_unprepare(i2s_tdm->mclk_rx_src);
clk_disable_unprepare(i2s_tdm->mclk_root0);
clk_disable_unprepare(i2s_tdm->mclk_root1);
}
}
/**
* i2s_tdm_prepare_enable_mclk - prepare to enable all mclks, disable them on
* failure.
* @i2s_tdm: rk_i2s_tdm_dev struct
*
* This function attempts to enable all mclk clocks, but cleans up after
* itself on failure. Guarantees to balance its calls.
*
* Returns success (0) or negative errno.
*/
static int i2s_tdm_prepare_enable_mclk(struct rk_i2s_tdm_dev *i2s_tdm)
{
int ret = 0;
ret = clk_prepare_enable(i2s_tdm->mclk_tx);
if (ret)
goto err_mclk_tx;
ret = clk_prepare_enable(i2s_tdm->mclk_rx);
if (ret)
goto err_mclk_rx;
if (i2s_tdm->mclk_calibrate) {
ret = clk_prepare_enable(i2s_tdm->mclk_tx_src);
if (ret)
goto err_mclk_rx;
ret = clk_prepare_enable(i2s_tdm->mclk_rx_src);
if (ret)
goto err_mclk_rx_src;
ret = clk_prepare_enable(i2s_tdm->mclk_root0);
if (ret)
goto err_mclk_root0;
ret = clk_prepare_enable(i2s_tdm->mclk_root1);
if (ret)
goto err_mclk_root1;
}
return 0;
err_mclk_root1:
clk_disable_unprepare(i2s_tdm->mclk_root0);
err_mclk_root0:
clk_disable_unprepare(i2s_tdm->mclk_rx_src);
err_mclk_rx_src:
clk_disable_unprepare(i2s_tdm->mclk_tx_src);
err_mclk_rx:
clk_disable_unprepare(i2s_tdm->mclk_tx);
err_mclk_tx:
return ret;
}
static int __maybe_unused i2s_tdm_runtime_suspend(struct device *dev)
{
struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
regcache_cache_only(i2s_tdm->regmap, true);
i2s_tdm_disable_unprepare_mclk(i2s_tdm);
clk_disable_unprepare(i2s_tdm->hclk);
return 0;
}
static int __maybe_unused i2s_tdm_runtime_resume(struct device *dev)
{
struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(i2s_tdm->hclk);
if (ret)
goto err_hclk;
ret = i2s_tdm_prepare_enable_mclk(i2s_tdm);
if (ret)
goto err_mclk;
regcache_cache_only(i2s_tdm->regmap, false);
regcache_mark_dirty(i2s_tdm->regmap);
ret = regcache_sync(i2s_tdm->regmap);
if (ret)
goto err_regcache;
return 0;
err_regcache:
i2s_tdm_disable_unprepare_mclk(i2s_tdm);
err_mclk:
clk_disable_unprepare(i2s_tdm->hclk);
err_hclk:
return ret;
}
static inline struct rk_i2s_tdm_dev *to_info(struct snd_soc_dai *dai)
{
return snd_soc_dai_get_drvdata(dai);
}
/*
* Makes sure that both tx and rx are reset at the same time to sync lrck
* when clk_trcm > 0.
*/
static void rockchip_snd_xfer_sync_reset(struct rk_i2s_tdm_dev *i2s_tdm)
{
/* This is technically race-y.
*
* In an ideal world, we could atomically assert both resets at the
* same time, through an atomic bulk reset API. This API however does
* not exist, so what the downstream vendor code used to do was
* implement half a reset controller here and require the CRU to be
* passed to the driver as a device tree node. Violating abstractions
* like that is bad, especially when it influences something like the
* bindings which are supposed to describe the hardware, not whatever
* workarounds the driver needs, so it was dropped.
*
* In practice, asserting the resets one by one appears to work just
* fine for playback. During duplex (playback + capture) operation,
* this might become an issue, but that should be solved by the
* implementation of the aforementioned API, not by shoving a reset
* controller into an audio driver.
*/
reset_control_assert(i2s_tdm->tx_reset);
reset_control_assert(i2s_tdm->rx_reset);
udelay(10);
reset_control_deassert(i2s_tdm->tx_reset);
reset_control_deassert(i2s_tdm->rx_reset);
udelay(10);
}
static void rockchip_snd_reset(struct reset_control *rc)
{
reset_control_assert(rc);
udelay(10);
reset_control_deassert(rc);
udelay(10);
}
static void rockchip_snd_xfer_clear(struct rk_i2s_tdm_dev *i2s_tdm,
unsigned int clr)
{
unsigned int xfer_mask = 0;
unsigned int xfer_val = 0;
unsigned int val;
int retry = 10;
bool tx = clr & I2S_CLR_TXC;
bool rx = clr & I2S_CLR_RXC;
if (!(rx || tx))
return;
if (tx) {
xfer_mask = I2S_XFER_TXS_START;
xfer_val = I2S_XFER_TXS_STOP;
}
if (rx) {
xfer_mask |= I2S_XFER_RXS_START;
xfer_val |= I2S_XFER_RXS_STOP;
}
regmap_update_bits(i2s_tdm->regmap, I2S_XFER, xfer_mask, xfer_val);
udelay(150);
regmap_update_bits(i2s_tdm->regmap, I2S_CLR, clr, clr);
regmap_read(i2s_tdm->regmap, I2S_CLR, &val);
/* Wait on the clear operation to finish */
while (val) {
udelay(15);
regmap_read(i2s_tdm->regmap, I2S_CLR, &val);
retry--;
if (!retry) {
dev_warn(i2s_tdm->dev, "clear failed, reset %s%s\n",
tx ? "tx" : "", rx ? "rx" : "");
if (rx && tx)
rockchip_snd_xfer_sync_reset(i2s_tdm);
else if (tx)
rockchip_snd_reset(i2s_tdm->tx_reset);
else if (rx)
rockchip_snd_reset(i2s_tdm->rx_reset);
break;
}
}
}
static inline void rockchip_enable_tde(struct regmap *regmap)
{
regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE,
I2S_DMACR_TDE_ENABLE);
}
static inline void rockchip_disable_tde(struct regmap *regmap)
{
regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE,
I2S_DMACR_TDE_DISABLE);
}
static inline void rockchip_enable_rde(struct regmap *regmap)
{
regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE,
I2S_DMACR_RDE_ENABLE);
}
static inline void rockchip_disable_rde(struct regmap *regmap)
{
regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE,
I2S_DMACR_RDE_DISABLE);
}
/* only used when clk_trcm > 0 */
static void rockchip_snd_txrxctrl(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai, int on)
{
struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
unsigned long flags;
spin_lock_irqsave(&i2s_tdm->lock, flags);
if (on) {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
rockchip_enable_tde(i2s_tdm->regmap);
else
rockchip_enable_rde(i2s_tdm->regmap);
if (++i2s_tdm->refcount == 1) {
rockchip_snd_xfer_sync_reset(i2s_tdm);
regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
I2S_XFER_TXS_START |
I2S_XFER_RXS_START,
I2S_XFER_TXS_START |
I2S_XFER_RXS_START);
}
} else {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
rockchip_disable_tde(i2s_tdm->regmap);
else
rockchip_disable_rde(i2s_tdm->regmap);
if (--i2s_tdm->refcount == 0) {
rockchip_snd_xfer_clear(i2s_tdm,
I2S_CLR_TXC | I2S_CLR_RXC);
}
}
spin_unlock_irqrestore(&i2s_tdm->lock, flags);
}
static void rockchip_snd_txctrl(struct rk_i2s_tdm_dev *i2s_tdm, int on)
{
if (on) {
rockchip_enable_tde(i2s_tdm->regmap);
regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
I2S_XFER_TXS_START,
I2S_XFER_TXS_START);
} else {
rockchip_disable_tde(i2s_tdm->regmap);
rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_TXC);
}
}
static void rockchip_snd_rxctrl(struct rk_i2s_tdm_dev *i2s_tdm, int on)
{
if (on) {
rockchip_enable_rde(i2s_tdm->regmap);
regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
I2S_XFER_RXS_START,
I2S_XFER_RXS_START);
} else {
rockchip_disable_rde(i2s_tdm->regmap);
rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_RXC);
}
}
static int rockchip_i2s_tdm_set_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct rk_i2s_tdm_dev *i2s_tdm = to_info(cpu_dai);
unsigned int mask, val, tdm_val, txcr_val, rxcr_val;
int ret;
bool is_tdm = i2s_tdm->tdm_mode;
ret = pm_runtime_resume_and_get(cpu_dai->dev);
if (ret < 0 && ret != -EACCES)
return ret;
mask = I2S_CKR_MSS_MASK;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_BP_FP:
val = I2S_CKR_MSS_MASTER;
i2s_tdm->is_master_mode = true;
break;
case SND_SOC_DAIFMT_BC_FC:
val = I2S_CKR_MSS_SLAVE;
i2s_tdm->is_master_mode = false;
break;
default:
ret = -EINVAL;
goto err_pm_put;
}
regmap_update_bits(i2s_tdm->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_tdm->regmap, I2S_CKR, mask, val);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
txcr_val = I2S_TXCR_IBM_RSJM;
rxcr_val = I2S_RXCR_IBM_RSJM;
break;
case SND_SOC_DAIFMT_LEFT_J:
txcr_val = I2S_TXCR_IBM_LSJM;
rxcr_val = I2S_RXCR_IBM_LSJM;
break;
case SND_SOC_DAIFMT_I2S:
txcr_val = I2S_TXCR_IBM_NORMAL;
rxcr_val = I2S_RXCR_IBM_NORMAL;
break;
case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 mode */
txcr_val = I2S_TXCR_TFS_PCM | I2S_TXCR_PBM_MODE(1);
rxcr_val = I2S_RXCR_TFS_PCM | I2S_RXCR_PBM_MODE(1);
break;
case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
txcr_val = I2S_TXCR_TFS_PCM;
rxcr_val = I2S_RXCR_TFS_PCM;
break;
default:
ret = -EINVAL;
goto err_pm_put;
}
mask = I2S_TXCR_IBM_MASK | I2S_TXCR_TFS_MASK | I2S_TXCR_PBM_MASK;
regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, mask, txcr_val);
mask = I2S_RXCR_IBM_MASK | I2S_RXCR_TFS_MASK | I2S_RXCR_PBM_MASK;
regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, mask, rxcr_val);
if (is_tdm) {
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
val = I2S_TXCR_TFS_TDM_I2S;
tdm_val = TDM_SHIFT_CTRL(2);
break;
case SND_SOC_DAIFMT_LEFT_J:
val = I2S_TXCR_TFS_TDM_I2S;
tdm_val = TDM_SHIFT_CTRL(1);
break;
case SND_SOC_DAIFMT_I2S:
val = I2S_TXCR_TFS_TDM_I2S;
tdm_val = TDM_SHIFT_CTRL(0);
break;
case SND_SOC_DAIFMT_DSP_A:
val = I2S_TXCR_TFS_TDM_PCM;
tdm_val = TDM_SHIFT_CTRL(0);
break;
case SND_SOC_DAIFMT_DSP_B:
val = I2S_TXCR_TFS_TDM_PCM;
tdm_val = TDM_SHIFT_CTRL(2);
break;
default:
ret = -EINVAL;
goto err_pm_put;
}
tdm_val |= TDM_FSYNC_WIDTH_SEL1(1);
tdm_val |= TDM_FSYNC_WIDTH_HALF_FRAME;
mask = I2S_TXCR_TFS_MASK;
regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, mask, val);
regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, mask, val);
mask = TDM_FSYNC_WIDTH_SEL1_MSK | TDM_FSYNC_WIDTH_SEL0_MSK |
TDM_SHIFT_CTRL_MSK;
regmap_update_bits(i2s_tdm->regmap, I2S_TDM_TXCR,
mask, tdm_val);
regmap_update_bits(i2s_tdm->regmap, I2S_TDM_RXCR,
mask, tdm_val);
}
err_pm_put:
pm_runtime_put(cpu_dai->dev);
return ret;
}
static void rockchip_i2s_tdm_xfer_pause(struct snd_pcm_substream *substream,
struct rk_i2s_tdm_dev *i2s_tdm)
{
int stream;
stream = SNDRV_PCM_STREAM_LAST - substream->stream;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
rockchip_disable_tde(i2s_tdm->regmap);
else
rockchip_disable_rde(i2s_tdm->regmap);
rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_TXC | I2S_CLR_RXC);
}
static void rockchip_i2s_tdm_xfer_resume(struct snd_pcm_substream *substream,
struct rk_i2s_tdm_dev *i2s_tdm)
{
int stream;
stream = SNDRV_PCM_STREAM_LAST - substream->stream;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
rockchip_enable_tde(i2s_tdm->regmap);
else
rockchip_enable_rde(i2s_tdm->regmap);
regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
I2S_XFER_TXS_START |
I2S_XFER_RXS_START,
I2S_XFER_TXS_START |
I2S_XFER_RXS_START);
}
static int rockchip_i2s_tdm_clk_set_rate(struct rk_i2s_tdm_dev *i2s_tdm,
struct clk *clk, unsigned long rate,
int ppm)
{
unsigned long rate_target;
int delta, ret;
if (ppm == i2s_tdm->clk_ppm)
return 0;
if (ppm < 0)
delta = -1;
else
delta = 1;
delta *= (int)div64_u64((u64)rate * (u64)abs(ppm) + 500000,
1000000);
rate_target = rate + delta;
if (!rate_target)
return -EINVAL;
ret = clk_set_rate(clk, rate_target);
if (ret)
return ret;
i2s_tdm->clk_ppm = ppm;
return 0;
}
static int rockchip_i2s_tdm_calibrate_mclk(struct rk_i2s_tdm_dev *i2s_tdm,
struct snd_pcm_substream *substream,
unsigned int lrck_freq)
{
struct clk *mclk_root;
struct clk *mclk_parent;
unsigned int mclk_root_freq;
unsigned int mclk_root_initial_freq;
unsigned int mclk_parent_freq;
unsigned int div, delta;
u64 ppm;
int ret;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
mclk_parent = i2s_tdm->mclk_tx_src;
else
mclk_parent = i2s_tdm->mclk_rx_src;
switch (lrck_freq) {
case 8000:
case 16000:
case 24000:
case 32000:
case 48000:
case 64000:
case 96000:
case 192000:
mclk_root = i2s_tdm->mclk_root0;
mclk_root_freq = i2s_tdm->mclk_root0_freq;
mclk_root_initial_freq = i2s_tdm->mclk_root0_initial_freq;
mclk_parent_freq = DEFAULT_MCLK_FS * 192000;
break;
case 11025:
case 22050:
case 44100:
case 88200:
case 176400:
mclk_root = i2s_tdm->mclk_root1;
mclk_root_freq = i2s_tdm->mclk_root1_freq;
mclk_root_initial_freq = i2s_tdm->mclk_root1_initial_freq;
mclk_parent_freq = DEFAULT_MCLK_FS * 176400;
break;
default:
dev_err(i2s_tdm->dev, "Invalid LRCK frequency: %u Hz\n",
lrck_freq);
return -EINVAL;
}
ret = clk_set_parent(mclk_parent, mclk_root);
if (ret)
return ret;
ret = rockchip_i2s_tdm_clk_set_rate(i2s_tdm, mclk_root,
mclk_root_freq, 0);
if (ret)
return ret;
delta = abs(mclk_root_freq % mclk_parent_freq - mclk_parent_freq);
ppm = div64_u64((uint64_t)delta * 1000000, (uint64_t)mclk_root_freq);
if (ppm) {
div = DIV_ROUND_CLOSEST(mclk_root_initial_freq, mclk_parent_freq);
if (!div)
return -EINVAL;
mclk_root_freq = mclk_parent_freq * round_up(div, 2);
ret = clk_set_rate(mclk_root, mclk_root_freq);
if (ret)
return ret;
i2s_tdm->mclk_root0_freq = clk_get_rate(i2s_tdm->mclk_root0);
i2s_tdm->mclk_root1_freq = clk_get_rate(i2s_tdm->mclk_root1);
}
return clk_set_rate(mclk_parent, mclk_parent_freq);
}
static int rockchip_i2s_tdm_set_mclk(struct rk_i2s_tdm_dev *i2s_tdm,
struct snd_pcm_substream *substream,
struct clk **mclk)
{
unsigned int mclk_freq;
int ret;
if (i2s_tdm->clk_trcm) {
if (i2s_tdm->mclk_tx_freq != i2s_tdm->mclk_rx_freq) {
dev_err(i2s_tdm->dev,
"clk_trcm, tx: %d and rx: %d should be the same\n",
i2s_tdm->mclk_tx_freq,
i2s_tdm->mclk_rx_freq);
return -EINVAL;
}
ret = clk_set_rate(i2s_tdm->mclk_tx, i2s_tdm->mclk_tx_freq);
if (ret)
return ret;
ret = clk_set_rate(i2s_tdm->mclk_rx, i2s_tdm->mclk_rx_freq);
if (ret)
return ret;
/* mclk_rx is also ok. */
*mclk = i2s_tdm->mclk_tx;
} else {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
*mclk = i2s_tdm->mclk_tx;
mclk_freq = i2s_tdm->mclk_tx_freq;
} else {
*mclk = i2s_tdm->mclk_rx;
mclk_freq = i2s_tdm->mclk_rx_freq;
}
ret = clk_set_rate(*mclk, mclk_freq);
if (ret)
return ret;
}
return 0;
}
static int rockchip_i2s_ch_to_io(unsigned int ch, bool substream_capture)
{
if (substream_capture) {
switch (ch) {
case I2S_CHN_4:
return I2S_IO_6CH_OUT_4CH_IN;
case I2S_CHN_6:
return I2S_IO_4CH_OUT_6CH_IN;
case I2S_CHN_8:
return I2S_IO_2CH_OUT_8CH_IN;
default:
return I2S_IO_8CH_OUT_2CH_IN;
}
} else {
switch (ch) {
case I2S_CHN_4:
return I2S_IO_4CH_OUT_6CH_IN;
case I2S_CHN_6:
return I2S_IO_6CH_OUT_4CH_IN;
case I2S_CHN_8:
return I2S_IO_8CH_OUT_2CH_IN;
default:
return I2S_IO_2CH_OUT_8CH_IN;
}
}
}
static int rockchip_i2s_io_multiplex(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
int usable_chs = MULTIPLEX_CH_MAX;
unsigned int val = 0;
if (!i2s_tdm->io_multiplex)
return 0;
if (IS_ERR_OR_NULL(i2s_tdm->grf)) {
dev_err(i2s_tdm->dev,
"io multiplex not supported for this device\n");
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
struct snd_pcm_str *playback_str =
&substream->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK];
if (playback_str->substream_opened) {
regmap_read(i2s_tdm->regmap, I2S_TXCR, &val);
val &= I2S_TXCR_CSR_MASK;
usable_chs = MULTIPLEX_CH_MAX - to_ch_num(val);
}
regmap_read(i2s_tdm->regmap, I2S_RXCR, &val);
val &= I2S_RXCR_CSR_MASK;
if (to_ch_num(val) > usable_chs) {
dev_err(i2s_tdm->dev,
"Capture channels (%d) > usable channels (%d)\n",
to_ch_num(val), usable_chs);
return -EINVAL;
}
rockchip_i2s_ch_to_io(val, true);
} else {
struct snd_pcm_str *capture_str =
&substream->pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
if (capture_str->substream_opened) {
regmap_read(i2s_tdm->regmap, I2S_RXCR, &val);
val &= I2S_RXCR_CSR_MASK;
usable_chs = MULTIPLEX_CH_MAX - to_ch_num(val);
}
regmap_read(i2s_tdm->regmap, I2S_TXCR, &val);
val &= I2S_TXCR_CSR_MASK;
if (to_ch_num(val) > usable_chs) {
dev_err(i2s_tdm->dev,
"Playback channels (%d) > usable channels (%d)\n",
to_ch_num(val), usable_chs);
return -EINVAL;
}
}
val <<= i2s_tdm->soc_data->grf_shift;
val |= (I2S_IO_DIRECTION_MASK << i2s_tdm->soc_data->grf_shift) << 16;
regmap_write(i2s_tdm->grf, i2s_tdm->soc_data->grf_reg_offset, val);
return 0;
}
static int rockchip_i2s_trcm_mode(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai,
unsigned int div_bclk,
unsigned int div_lrck,
unsigned int fmt)
{
struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
unsigned long flags;
if (!i2s_tdm->clk_trcm)
return 0;
spin_lock_irqsave(&i2s_tdm->lock, flags);
if (i2s_tdm->refcount)
rockchip_i2s_tdm_xfer_pause(substream, i2s_tdm);
regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV,
I2S_CLKDIV_TXM_MASK | I2S_CLKDIV_RXM_MASK,
I2S_CLKDIV_TXM(div_bclk) | I2S_CLKDIV_RXM(div_bclk));
regmap_update_bits(i2s_tdm->regmap, I2S_CKR,
I2S_CKR_TSD_MASK | I2S_CKR_RSD_MASK,
I2S_CKR_TSD(div_lrck) | I2S_CKR_RSD(div_lrck));
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
regmap_update_bits(i2s_tdm->regmap, I2S_TXCR,
I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
fmt);
else
regmap_update_bits(i2s_tdm->regmap, I2S_RXCR,
I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
fmt);
if (i2s_tdm->refcount)
rockchip_i2s_tdm_xfer_resume(substream, i2s_tdm);
spin_unlock_irqrestore(&i2s_tdm->lock, flags);
return 0;
}
static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
struct clk *mclk;
int ret = 0;
unsigned int val = 0;
unsigned int mclk_rate, bclk_rate, div_bclk = 4, div_lrck = 64;
if (i2s_tdm->is_master_mode) {
if (i2s_tdm->mclk_calibrate)
rockchip_i2s_tdm_calibrate_mclk(i2s_tdm, substream,
params_rate(params));
ret = rockchip_i2s_tdm_set_mclk(i2s_tdm, substream, &mclk);
if (ret)
return ret;
mclk_rate = clk_get_rate(mclk);
bclk_rate = i2s_tdm->frame_width * params_rate(params);
if (!bclk_rate)
return -EINVAL;
div_bclk = DIV_ROUND_CLOSEST(mclk_rate, bclk_rate);
div_lrck = bclk_rate / params_rate(params);
}
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:
return -EINVAL;
}
if (i2s_tdm->clk_trcm) {
rockchip_i2s_trcm_mode(substream, dai, div_bclk, div_lrck, val);
} else if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV,
I2S_CLKDIV_TXM_MASK,
I2S_CLKDIV_TXM(div_bclk));
regmap_update_bits(i2s_tdm->regmap, I2S_CKR,
I2S_CKR_TSD_MASK,
I2S_CKR_TSD(div_lrck));
regmap_update_bits(i2s_tdm->regmap, I2S_TXCR,
I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
val);
} else {
regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV,
I2S_CLKDIV_RXM_MASK,
I2S_CLKDIV_RXM(div_bclk));
regmap_update_bits(i2s_tdm->regmap, I2S_CKR,
I2S_CKR_RSD_MASK,
I2S_CKR_RSD(div_lrck));
regmap_update_bits(i2s_tdm->regmap, I2S_RXCR,
I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
val);
}
return rockchip_i2s_io_multiplex(substream, dai);
}
static int rockchip_i2s_tdm_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (i2s_tdm->clk_trcm)
rockchip_snd_txrxctrl(substream, dai, 1);
else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
rockchip_snd_rxctrl(i2s_tdm, 1);
else
rockchip_snd_txctrl(i2s_tdm, 1);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (i2s_tdm->clk_trcm)
rockchip_snd_txrxctrl(substream, dai, 0);
else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
rockchip_snd_rxctrl(i2s_tdm, 0);
else
rockchip_snd_txctrl(i2s_tdm, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static int rockchip_i2s_tdm_set_sysclk(struct snd_soc_dai *cpu_dai, int stream,
unsigned int freq, int dir)
{
struct rk_i2s_tdm_dev *i2s_tdm = to_info(cpu_dai);
/* Put set mclk rate into rockchip_i2s_tdm_set_mclk() */
if (i2s_tdm->clk_trcm) {
i2s_tdm->mclk_tx_freq = freq;
i2s_tdm->mclk_rx_freq = freq;
} else {
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
i2s_tdm->mclk_tx_freq = freq;
else
i2s_tdm->mclk_rx_freq = freq;
}
dev_dbg(i2s_tdm->dev, "The target mclk_%s freq is: %d\n",
stream ? "rx" : "tx", freq);
return 0;
}
static int rockchip_i2s_tdm_clk_compensation_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = CLK_PPM_MIN;
uinfo->value.integer.max = CLK_PPM_MAX;
uinfo->value.integer.step = 1;
return 0;
}
static int rockchip_i2s_tdm_clk_compensation_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
ucontrol->value.integer.value[0] = i2s_tdm->clk_ppm;
return 0;
}
static int rockchip_i2s_tdm_clk_compensation_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
int ret = 0, ppm = 0;
int changed = 0;
unsigned long old_rate;
if (ucontrol->value.integer.value[0] < CLK_PPM_MIN ||
ucontrol->value.integer.value[0] > CLK_PPM_MAX)
return -EINVAL;
ppm = ucontrol->value.integer.value[0];
old_rate = clk_get_rate(i2s_tdm->mclk_root0);
ret = rockchip_i2s_tdm_clk_set_rate(i2s_tdm, i2s_tdm->mclk_root0,
i2s_tdm->mclk_root0_freq, ppm);
if (ret)
return ret;
if (old_rate != clk_get_rate(i2s_tdm->mclk_root0))
changed = 1;
if (clk_is_match(i2s_tdm->mclk_root0, i2s_tdm->mclk_root1))
return changed;
old_rate = clk_get_rate(i2s_tdm->mclk_root1);
ret = rockchip_i2s_tdm_clk_set_rate(i2s_tdm, i2s_tdm->mclk_root1,
i2s_tdm->mclk_root1_freq, ppm);
if (ret)
return ret;
if (old_rate != clk_get_rate(i2s_tdm->mclk_root1))
changed = 1;
return changed;
}
static struct snd_kcontrol_new rockchip_i2s_tdm_compensation_control = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "PCM Clock Compensation in PPM",
.info = rockchip_i2s_tdm_clk_compensation_info,
.get = rockchip_i2s_tdm_clk_compensation_get,
.put = rockchip_i2s_tdm_clk_compensation_put,
};
static int rockchip_i2s_tdm_dai_probe(struct snd_soc_dai *dai)
{
struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
if (i2s_tdm->has_capture)
snd_soc_dai_dma_data_set_capture(dai, &i2s_tdm->capture_dma_data);
if (i2s_tdm->has_playback)
snd_soc_dai_dma_data_set_playback(dai, &i2s_tdm->playback_dma_data);
if (i2s_tdm->mclk_calibrate)
snd_soc_add_dai_controls(dai, &rockchip_i2s_tdm_compensation_control, 1);
return 0;
}
static int rockchip_dai_tdm_slot(struct snd_soc_dai *dai,
unsigned int tx_mask, unsigned int rx_mask,
int slots, int slot_width)
{
struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
unsigned int mask, val;
i2s_tdm->tdm_mode = true;
i2s_tdm->frame_width = slots * slot_width;
mask = TDM_SLOT_BIT_WIDTH_MSK | TDM_FRAME_WIDTH_MSK;
val = TDM_SLOT_BIT_WIDTH(slot_width) |
TDM_FRAME_WIDTH(slots * slot_width);
regmap_update_bits(i2s_tdm->regmap, I2S_TDM_TXCR,
mask, val);
regmap_update_bits(i2s_tdm->regmap, I2S_TDM_RXCR,
mask, val);
return 0;
}
static int rockchip_i2s_tdm_set_bclk_ratio(struct snd_soc_dai *dai,
unsigned int ratio)
{
struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
if (ratio < 32 || ratio > 512 || ratio % 2 == 1)
return -EINVAL;
i2s_tdm->frame_width = ratio;
return 0;
}
static const struct snd_soc_dai_ops rockchip_i2s_tdm_dai_ops = {
.hw_params = rockchip_i2s_tdm_hw_params,
.set_bclk_ratio = rockchip_i2s_tdm_set_bclk_ratio,
.set_sysclk = rockchip_i2s_tdm_set_sysclk,
.set_fmt = rockchip_i2s_tdm_set_fmt,
.set_tdm_slot = rockchip_dai_tdm_slot,
.trigger = rockchip_i2s_tdm_trigger,
};
static const struct snd_soc_component_driver rockchip_i2s_tdm_component = {
.name = DRV_NAME,
.legacy_dai_naming = 1,
};
static bool rockchip_i2s_tdm_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:
case I2S_TDM_TXCR:
case I2S_TDM_RXCR:
case I2S_CLKDIV:
return true;
default:
return false;
}
}
static bool rockchip_i2s_tdm_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_TXFIFOLR:
case I2S_INTSR:
case I2S_RXFIFOLR:
case I2S_TDM_TXCR:
case I2S_TDM_RXCR:
case I2S_CLKDIV:
return true;
default:
return false;
}
}
static bool rockchip_i2s_tdm_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case I2S_TXFIFOLR:
case I2S_INTSR:
case I2S_CLR:
case I2S_TXDR:
case I2S_RXDR:
case I2S_RXFIFOLR:
return true;
default:
return false;
}
}
static bool rockchip_i2s_tdm_precious_reg(struct device *dev, unsigned int reg)
{
if (reg == I2S_RXDR)
return true;
return false;
}
static const struct reg_default rockchip_i2s_tdm_reg_defaults[] = {
{0x00, 0x7200000f},
{0x04, 0x01c8000f},
{0x08, 0x00001f1f},
{0x10, 0x001f0000},
{0x14, 0x01f00000},
{0x30, 0x00003eff},
{0x34, 0x00003eff},
{0x38, 0x00000707},
};
static const struct regmap_config rockchip_i2s_tdm_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = I2S_CLKDIV,
.reg_defaults = rockchip_i2s_tdm_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(rockchip_i2s_tdm_reg_defaults),
.writeable_reg = rockchip_i2s_tdm_wr_reg,
.readable_reg = rockchip_i2s_tdm_rd_reg,
.volatile_reg = rockchip_i2s_tdm_volatile_reg,
.precious_reg = rockchip_i2s_tdm_precious_reg,
.cache_type = REGCACHE_FLAT,
};
static int common_soc_init(struct device *dev, u32 addr)
{
struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
const struct txrx_config *configs = i2s_tdm->soc_data->configs;
u32 reg = 0, val = 0, trcm = i2s_tdm->clk_trcm;
int i;
if (trcm == TRCM_TXRX)
return 0;
if (IS_ERR_OR_NULL(i2s_tdm->grf)) {
dev_err(i2s_tdm->dev,
"no grf present but non-txrx TRCM specified\n");
return -EINVAL;
}
for (i = 0; i < i2s_tdm->soc_data->config_count; i++) {
if (addr != configs[i].addr)
continue;
reg = configs[i].reg;
if (trcm == TRCM_TX)
val = configs[i].txonly;
else
val = configs[i].rxonly;
if (reg)
regmap_write(i2s_tdm->grf, reg, val);
}
return 0;
}
static const struct txrx_config px30_txrx_config[] = {
{ 0xff060000, 0x184, PX30_I2S0_CLK_TXONLY, PX30_I2S0_CLK_RXONLY },
};
static const struct txrx_config rk1808_txrx_config[] = {
{ 0xff7e0000, 0x190, RK1808_I2S0_CLK_TXONLY, RK1808_I2S0_CLK_RXONLY },
};
static const struct txrx_config rk3308_txrx_config[] = {
{ 0xff300000, 0x308, RK3308_I2S0_CLK_TXONLY, RK3308_I2S0_CLK_RXONLY },
{ 0xff310000, 0x308, RK3308_I2S1_CLK_TXONLY, RK3308_I2S1_CLK_RXONLY },
};
static const struct txrx_config rk3568_txrx_config[] = {
{ 0xfe410000, 0x504, RK3568_I2S1_CLK_TXONLY, RK3568_I2S1_CLK_RXONLY },
{ 0xfe410000, 0x508, RK3568_I2S1_MCLK_TX_OE, RK3568_I2S1_MCLK_RX_OE },
{ 0xfe420000, 0x508, RK3568_I2S2_MCLK_OE, RK3568_I2S2_MCLK_OE },
{ 0xfe430000, 0x504, RK3568_I2S3_CLK_TXONLY, RK3568_I2S3_CLK_RXONLY },
{ 0xfe430000, 0x508, RK3568_I2S3_MCLK_TXONLY, RK3568_I2S3_MCLK_RXONLY },
{ 0xfe430000, 0x508, RK3568_I2S3_MCLK_OE, RK3568_I2S3_MCLK_OE },
};
static const struct txrx_config rv1126_txrx_config[] = {
{ 0xff800000, 0x10260, RV1126_I2S0_CLK_TXONLY, RV1126_I2S0_CLK_RXONLY },
};
static struct rk_i2s_soc_data px30_i2s_soc_data = {
.softrst_offset = 0x0300,
.configs = px30_txrx_config,
.config_count = ARRAY_SIZE(px30_txrx_config),
.init = common_soc_init,
};
static struct rk_i2s_soc_data rk1808_i2s_soc_data = {
.softrst_offset = 0x0300,
.configs = rk1808_txrx_config,
.config_count = ARRAY_SIZE(rk1808_txrx_config),
.init = common_soc_init,
};
static struct rk_i2s_soc_data rk3308_i2s_soc_data = {
.softrst_offset = 0x0400,
.grf_reg_offset = 0x0308,
.grf_shift = 5,
.configs = rk3308_txrx_config,
.config_count = ARRAY_SIZE(rk3308_txrx_config),
.init = common_soc_init,
};
static struct rk_i2s_soc_data rk3568_i2s_soc_data = {
.softrst_offset = 0x0400,
.configs = rk3568_txrx_config,
.config_count = ARRAY_SIZE(rk3568_txrx_config),
.init = common_soc_init,
};
static struct rk_i2s_soc_data rv1126_i2s_soc_data = {
.softrst_offset = 0x0300,
.configs = rv1126_txrx_config,
.config_count = ARRAY_SIZE(rv1126_txrx_config),
.init = common_soc_init,
};
static const struct of_device_id rockchip_i2s_tdm_match[] = {
{ .compatible = "rockchip,px30-i2s-tdm", .data = &px30_i2s_soc_data },
{ .compatible = "rockchip,rk1808-i2s-tdm", .data = &rk1808_i2s_soc_data },
{ .compatible = "rockchip,rk3308-i2s-tdm", .data = &rk3308_i2s_soc_data },
{ .compatible = "rockchip,rk3568-i2s-tdm", .data = &rk3568_i2s_soc_data },
{ .compatible = "rockchip,rk3588-i2s-tdm" },
{ .compatible = "rockchip,rv1126-i2s-tdm", .data = &rv1126_i2s_soc_data },
{},
};
static const struct snd_soc_dai_driver i2s_tdm_dai = {
.probe = rockchip_i2s_tdm_dai_probe,
.ops = &rockchip_i2s_tdm_dai_ops,
};
static int rockchip_i2s_tdm_init_dai(struct rk_i2s_tdm_dev *i2s_tdm)
{
struct snd_soc_dai_driver *dai;
struct property *dma_names;
const char *dma_name;
u64 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);
struct device_node *node = i2s_tdm->dev->of_node;
of_property_for_each_string(node, "dma-names", dma_names, dma_name) {
if (!strcmp(dma_name, "tx"))
i2s_tdm->has_playback = true;
if (!strcmp(dma_name, "rx"))
i2s_tdm->has_capture = true;
}
dai = devm_kmemdup(i2s_tdm->dev, &i2s_tdm_dai,
sizeof(*dai), GFP_KERNEL);
if (!dai)
return -ENOMEM;
if (i2s_tdm->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 = formats;
}
if (i2s_tdm->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 = formats;
}
if (i2s_tdm->clk_trcm != TRCM_TXRX)
dai->symmetric_rate = 1;
i2s_tdm->dai = dai;
return 0;
}
static int rockchip_i2s_tdm_path_check(struct rk_i2s_tdm_dev *i2s_tdm,
int num,
bool is_rx_path)
{
unsigned int *i2s_data;
int i, j;
if (is_rx_path)
i2s_data = i2s_tdm->i2s_sdis;
else
i2s_data = i2s_tdm->i2s_sdos;
for (i = 0; i < num; i++) {
if (i2s_data[i] > CH_GRP_MAX - 1) {
dev_err(i2s_tdm->dev,
"%s path i2s_data[%d]: %d is too high, max is: %d\n",
is_rx_path ? "RX" : "TX",
i, i2s_data[i], CH_GRP_MAX);
return -EINVAL;
}
for (j = 0; j < num; j++) {
if (i == j)
continue;
if (i2s_data[i] == i2s_data[j]) {
dev_err(i2s_tdm->dev,
"%s path invalid routed i2s_data: [%d]%d == [%d]%d\n",
is_rx_path ? "RX" : "TX",
i, i2s_data[i],
j, i2s_data[j]);
return -EINVAL;
}
}
}
return 0;
}
static void rockchip_i2s_tdm_tx_path_config(struct rk_i2s_tdm_dev *i2s_tdm,
int num)
{
int idx;
for (idx = 0; idx < num; idx++) {
regmap_update_bits(i2s_tdm->regmap, I2S_TXCR,
I2S_TXCR_PATH_MASK(idx),
I2S_TXCR_PATH(idx, i2s_tdm->i2s_sdos[idx]));
}
}
static void rockchip_i2s_tdm_rx_path_config(struct rk_i2s_tdm_dev *i2s_tdm,
int num)
{
int idx;
for (idx = 0; idx < num; idx++) {
regmap_update_bits(i2s_tdm->regmap, I2S_RXCR,
I2S_RXCR_PATH_MASK(idx),
I2S_RXCR_PATH(idx, i2s_tdm->i2s_sdis[idx]));
}
}
static void rockchip_i2s_tdm_path_config(struct rk_i2s_tdm_dev *i2s_tdm,
int num, bool is_rx_path)
{
if (is_rx_path)
rockchip_i2s_tdm_rx_path_config(i2s_tdm, num);
else
rockchip_i2s_tdm_tx_path_config(i2s_tdm, num);
}
static int rockchip_i2s_tdm_get_calibrate_mclks(struct rk_i2s_tdm_dev *i2s_tdm)
{
int num_mclks = 0;
i2s_tdm->mclk_tx_src = devm_clk_get(i2s_tdm->dev, "mclk_tx_src");
if (!IS_ERR(i2s_tdm->mclk_tx_src))
num_mclks++;
i2s_tdm->mclk_rx_src = devm_clk_get(i2s_tdm->dev, "mclk_rx_src");
if (!IS_ERR(i2s_tdm->mclk_rx_src))
num_mclks++;
i2s_tdm->mclk_root0 = devm_clk_get(i2s_tdm->dev, "mclk_root0");
if (!IS_ERR(i2s_tdm->mclk_root0))
num_mclks++;
i2s_tdm->mclk_root1 = devm_clk_get(i2s_tdm->dev, "mclk_root1");
if (!IS_ERR(i2s_tdm->mclk_root1))
num_mclks++;
if (num_mclks < 4 && num_mclks != 0)
return -ENOENT;
if (num_mclks == 4)
i2s_tdm->mclk_calibrate = 1;
return 0;
}
static int rockchip_i2s_tdm_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm,
struct device_node *np,
bool is_rx_path)
{
char *i2s_tx_path_prop = "rockchip,i2s-tx-route";
char *i2s_rx_path_prop = "rockchip,i2s-rx-route";
char *i2s_path_prop;
unsigned int *i2s_data;
int num, ret = 0;
if (is_rx_path) {
i2s_path_prop = i2s_rx_path_prop;
i2s_data = i2s_tdm->i2s_sdis;
} else {
i2s_path_prop = i2s_tx_path_prop;
i2s_data = i2s_tdm->i2s_sdos;
}
num = of_count_phandle_with_args(np, i2s_path_prop, NULL);
if (num < 0) {
if (num != -ENOENT) {
dev_err(i2s_tdm->dev,
"Failed to read '%s' num: %d\n",
i2s_path_prop, num);
ret = num;
}
return ret;
} else if (num != CH_GRP_MAX) {
dev_err(i2s_tdm->dev,
"The num: %d should be: %d\n", num, CH_GRP_MAX);
return -EINVAL;
}
ret = of_property_read_u32_array(np, i2s_path_prop,
i2s_data, num);
if (ret < 0) {
dev_err(i2s_tdm->dev,
"Failed to read '%s': %d\n",
i2s_path_prop, ret);
return ret;
}
ret = rockchip_i2s_tdm_path_check(i2s_tdm, num, is_rx_path);
if (ret < 0) {
dev_err(i2s_tdm->dev,
"Failed to check i2s data bus: %d\n", ret);
return ret;
}
rockchip_i2s_tdm_path_config(i2s_tdm, num, is_rx_path);
return 0;
}
static int rockchip_i2s_tdm_tx_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm,
struct device_node *np)
{
return rockchip_i2s_tdm_path_prepare(i2s_tdm, np, 0);
}
static int rockchip_i2s_tdm_rx_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm,
struct device_node *np)
{
return rockchip_i2s_tdm_path_prepare(i2s_tdm, np, 1);
}
static int rockchip_i2s_tdm_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
const struct of_device_id *of_id;
struct rk_i2s_tdm_dev *i2s_tdm;
struct resource *res;
void __iomem *regs;
int ret;
i2s_tdm = devm_kzalloc(&pdev->dev, sizeof(*i2s_tdm), GFP_KERNEL);
if (!i2s_tdm)
return -ENOMEM;
i2s_tdm->dev = &pdev->dev;
of_id = of_match_device(rockchip_i2s_tdm_match, &pdev->dev);
if (!of_id)
return -EINVAL;
spin_lock_init(&i2s_tdm->lock);
i2s_tdm->soc_data = (struct rk_i2s_soc_data *)of_id->data;
i2s_tdm->frame_width = 64;
i2s_tdm->clk_trcm = TRCM_TXRX;
if (of_property_read_bool(node, "rockchip,trcm-sync-tx-only"))
i2s_tdm->clk_trcm = TRCM_TX;
if (of_property_read_bool(node, "rockchip,trcm-sync-rx-only")) {
if (i2s_tdm->clk_trcm) {
dev_err(i2s_tdm->dev, "invalid trcm-sync configuration\n");
return -EINVAL;
}
i2s_tdm->clk_trcm = TRCM_RX;
}
ret = rockchip_i2s_tdm_init_dai(i2s_tdm);
if (ret)
return ret;
i2s_tdm->grf = syscon_regmap_lookup_by_phandle(node, "rockchip,grf");
i2s_tdm->tx_reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
"tx-m");
if (IS_ERR(i2s_tdm->tx_reset)) {
ret = PTR_ERR(i2s_tdm->tx_reset);
return dev_err_probe(i2s_tdm->dev, ret,
"Error in tx-m reset control\n");
}
i2s_tdm->rx_reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
"rx-m");
if (IS_ERR(i2s_tdm->rx_reset)) {
ret = PTR_ERR(i2s_tdm->rx_reset);
return dev_err_probe(i2s_tdm->dev, ret,
"Error in rx-m reset control\n");
}
i2s_tdm->hclk = devm_clk_get(&pdev->dev, "hclk");
if (IS_ERR(i2s_tdm->hclk)) {
return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->hclk),
"Failed to get clock hclk\n");
}
i2s_tdm->mclk_tx = devm_clk_get(&pdev->dev, "mclk_tx");
if (IS_ERR(i2s_tdm->mclk_tx)) {
return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->mclk_tx),
"Failed to get clock mclk_tx\n");
}
i2s_tdm->mclk_rx = devm_clk_get(&pdev->dev, "mclk_rx");
if (IS_ERR(i2s_tdm->mclk_rx)) {
return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->mclk_rx),
"Failed to get clock mclk_rx\n");
}
i2s_tdm->io_multiplex =
of_property_read_bool(node, "rockchip,io-multiplex");
ret = rockchip_i2s_tdm_get_calibrate_mclks(i2s_tdm);
if (ret)
return dev_err_probe(i2s_tdm->dev, ret,
"mclk-calibrate clocks missing");
regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(regs)) {
return dev_err_probe(i2s_tdm->dev, PTR_ERR(regs),
"Failed to get resource IORESOURCE_MEM\n");
}
i2s_tdm->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
&rockchip_i2s_tdm_regmap_config);
if (IS_ERR(i2s_tdm->regmap)) {
return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->regmap),
"Failed to initialise regmap\n");
}
if (i2s_tdm->has_playback) {
i2s_tdm->playback_dma_data.addr = res->start + I2S_TXDR;
i2s_tdm->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
i2s_tdm->playback_dma_data.maxburst = 8;
}
if (i2s_tdm->has_capture) {
i2s_tdm->capture_dma_data.addr = res->start + I2S_RXDR;
i2s_tdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
i2s_tdm->capture_dma_data.maxburst = 8;
}
ret = rockchip_i2s_tdm_tx_path_prepare(i2s_tdm, node);
if (ret < 0) {
dev_err(&pdev->dev, "I2S TX path prepare failed: %d\n", ret);
return ret;
}
ret = rockchip_i2s_tdm_rx_path_prepare(i2s_tdm, node);
if (ret < 0) {
dev_err(&pdev->dev, "I2S RX path prepare failed: %d\n", ret);
return ret;
}
dev_set_drvdata(&pdev->dev, i2s_tdm);
ret = clk_prepare_enable(i2s_tdm->hclk);
if (ret) {
return dev_err_probe(i2s_tdm->dev, ret,
"Failed to enable clock hclk\n");
}
ret = i2s_tdm_prepare_enable_mclk(i2s_tdm);
if (ret) {
ret = dev_err_probe(i2s_tdm->dev, ret,
"Failed to enable one or more mclks\n");
goto err_disable_hclk;
}
if (i2s_tdm->mclk_calibrate) {
i2s_tdm->mclk_root0_initial_freq = clk_get_rate(i2s_tdm->mclk_root0);
i2s_tdm->mclk_root1_initial_freq = clk_get_rate(i2s_tdm->mclk_root1);
i2s_tdm->mclk_root0_freq = i2s_tdm->mclk_root0_initial_freq;
i2s_tdm->mclk_root1_freq = i2s_tdm->mclk_root1_initial_freq;
}
pm_runtime_enable(&pdev->dev);
regmap_update_bits(i2s_tdm->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
I2S_DMACR_TDL(16));
regmap_update_bits(i2s_tdm->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
I2S_DMACR_RDL(16));
regmap_update_bits(i2s_tdm->regmap, I2S_CKR, I2S_CKR_TRCM_MASK,
i2s_tdm->clk_trcm << I2S_CKR_TRCM_SHIFT);
if (i2s_tdm->soc_data && i2s_tdm->soc_data->init)
i2s_tdm->soc_data->init(&pdev->dev, res->start);
ret = devm_snd_soc_register_component(&pdev->dev,
&rockchip_i2s_tdm_component,
i2s_tdm->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_tdm_runtime_suspend(&pdev->dev);
pm_runtime_disable(&pdev->dev);
err_disable_hclk:
clk_disable_unprepare(i2s_tdm->hclk);
return ret;
}
static int rockchip_i2s_tdm_remove(struct platform_device *pdev)
{
if (!pm_runtime_status_suspended(&pdev->dev))
i2s_tdm_runtime_suspend(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
static int __maybe_unused rockchip_i2s_tdm_suspend(struct device *dev)
{
struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
regcache_mark_dirty(i2s_tdm->regmap);
return 0;
}
static int __maybe_unused rockchip_i2s_tdm_resume(struct device *dev)
{
struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
int ret;
ret = pm_runtime_resume_and_get(dev);
if (ret < 0)
return ret;
ret = regcache_sync(i2s_tdm->regmap);
pm_runtime_put(dev);
return ret;
}
static const struct dev_pm_ops rockchip_i2s_tdm_pm_ops = {
SET_RUNTIME_PM_OPS(i2s_tdm_runtime_suspend, i2s_tdm_runtime_resume,
NULL)
SET_SYSTEM_SLEEP_PM_OPS(rockchip_i2s_tdm_suspend,
rockchip_i2s_tdm_resume)
};
static struct platform_driver rockchip_i2s_tdm_driver = {
.probe = rockchip_i2s_tdm_probe,
.remove = rockchip_i2s_tdm_remove,
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(rockchip_i2s_tdm_match),
.pm = &rockchip_i2s_tdm_pm_ops,
},
};
module_platform_driver(rockchip_i2s_tdm_driver);
MODULE_DESCRIPTION("ROCKCHIP I2S/TDM ASoC Interface");
MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, rockchip_i2s_tdm_match);