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sun4i-i2s.c
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sun4i-i2s.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2015 Andrea Venturi
* Andrea Venturi <[email protected]>
*
* Copyright (C) 2016 Maxime Ripard
* Maxime Ripard <[email protected]>
*/
#include <linux/clk.h>
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#define SUN4I_I2S_CTRL_REG 0x00
#define SUN4I_I2S_CTRL_SDO_EN_MASK GENMASK(11, 8)
#define SUN4I_I2S_CTRL_SDO_EN(sdo) BIT(8 + (sdo))
#define SUN4I_I2S_CTRL_MODE_MASK BIT(5)
#define SUN4I_I2S_CTRL_MODE_SLAVE (1 << 5)
#define SUN4I_I2S_CTRL_MODE_MASTER (0 << 5)
#define SUN4I_I2S_CTRL_TX_EN BIT(2)
#define SUN4I_I2S_CTRL_RX_EN BIT(1)
#define SUN4I_I2S_CTRL_GL_EN BIT(0)
#define SUN4I_I2S_FMT0_REG 0x04
#define SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(7)
#define SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 7)
#define SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 7)
#define SUN4I_I2S_FMT0_BCLK_POLARITY_MASK BIT(6)
#define SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 6)
#define SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 6)
#define SUN4I_I2S_FMT0_SR_MASK GENMASK(5, 4)
#define SUN4I_I2S_FMT0_SR(sr) ((sr) << 4)
#define SUN4I_I2S_FMT0_WSS_MASK GENMASK(3, 2)
#define SUN4I_I2S_FMT0_WSS(wss) ((wss) << 2)
#define SUN4I_I2S_FMT0_FMT_MASK GENMASK(1, 0)
#define SUN4I_I2S_FMT0_FMT_RIGHT_J (2 << 0)
#define SUN4I_I2S_FMT0_FMT_LEFT_J (1 << 0)
#define SUN4I_I2S_FMT0_FMT_I2S (0 << 0)
#define SUN4I_I2S_FMT1_REG 0x08
#define SUN4I_I2S_FIFO_TX_REG 0x0c
#define SUN4I_I2S_FIFO_RX_REG 0x10
#define SUN4I_I2S_FIFO_CTRL_REG 0x14
#define SUN4I_I2S_FIFO_CTRL_FLUSH_TX BIT(25)
#define SUN4I_I2S_FIFO_CTRL_FLUSH_RX BIT(24)
#define SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK BIT(2)
#define SUN4I_I2S_FIFO_CTRL_TX_MODE(mode) ((mode) << 2)
#define SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK GENMASK(1, 0)
#define SUN4I_I2S_FIFO_CTRL_RX_MODE(mode) (mode)
#define SUN4I_I2S_FIFO_STA_REG 0x18
#define SUN4I_I2S_DMA_INT_CTRL_REG 0x1c
#define SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN BIT(7)
#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
#define SUN4I_I2S_INT_STA_REG 0x20
#define SUN4I_I2S_CLK_DIV_REG 0x24
#define SUN4I_I2S_CLK_DIV_MCLK_EN BIT(7)
#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
#define SUN4I_I2S_CLK_DIV_MCLK_MASK GENMASK(3, 0)
#define SUN4I_I2S_CLK_DIV_MCLK(mclk) ((mclk) << 0)
#define SUN4I_I2S_TX_CNT_REG 0x28
#define SUN4I_I2S_RX_CNT_REG 0x2c
#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
#define SUN4I_I2S_CHAN_SEL_MASK GENMASK(2, 0)
#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
/* Defines required for sun8i-h3 support */
#define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
#define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
#define SUN8I_I2S_CTRL_MODE_MASK GENMASK(5, 4)
#define SUN8I_I2S_CTRL_MODE_RIGHT (2 << 4)
#define SUN8I_I2S_CTRL_MODE_LEFT (1 << 4)
#define SUN8I_I2S_CTRL_MODE_PCM (0 << 4)
#define SUN8I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(19)
#define SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 19)
#define SUN8I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 19)
#define SUN8I_I2S_FMT0_LRCK_PERIOD_MASK GENMASK(17, 8)
#define SUN8I_I2S_FMT0_LRCK_PERIOD(period) ((period - 1) << 8)
#define SUN8I_I2S_FMT0_BCLK_POLARITY_MASK BIT(7)
#define SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 7)
#define SUN8I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 7)
#define SUN8I_I2S_INT_STA_REG 0x0c
#define SUN8I_I2S_FIFO_TX_REG 0x20
#define SUN8I_I2S_CHAN_CFG_REG 0x30
#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK GENMASK(6, 4)
#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(chan) ((chan - 1) << 4)
#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK GENMASK(2, 0)
#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(chan) (chan - 1)
#define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
#define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
#define SUN8I_I2S_TX_CHAN_OFFSET_MASK GENMASK(13, 12)
#define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
#define SUN8I_I2S_TX_CHAN_EN_MASK GENMASK(11, 4)
#define SUN8I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1) << 4)
#define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
#define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
struct sun4i_i2s;
/**
* struct sun4i_i2s_quirks - Differences between SoC variants.
*
* @has_reset: SoC needs reset deasserted.
* @has_fmt_set_lrck_period: SoC requires lrclk period to be set.
* @reg_offset_txdata: offset of the tx fifo.
* @sun4i_i2s_regmap: regmap config to use.
* @field_clkdiv_mclk_en: regmap field to enable mclk output.
* @field_fmt_wss: regmap field to set word select size.
* @field_fmt_sr: regmap field to set sample resolution.
*/
struct sun4i_i2s_quirks {
bool has_reset;
bool has_fmt_set_lrck_period;
unsigned int reg_offset_txdata; /* TX FIFO */
const struct regmap_config *sun4i_i2s_regmap;
/* Register fields for i2s */
struct reg_field field_clkdiv_mclk_en;
struct reg_field field_fmt_wss;
struct reg_field field_fmt_sr;
const struct sun4i_i2s_clk_div *bclk_dividers;
unsigned int num_bclk_dividers;
const struct sun4i_i2s_clk_div *mclk_dividers;
unsigned int num_mclk_dividers;
unsigned long (*get_bclk_parent_rate)(const struct sun4i_i2s *);
s8 (*get_sr)(const struct sun4i_i2s *, int);
s8 (*get_wss)(const struct sun4i_i2s *, int);
int (*set_chan_cfg)(const struct sun4i_i2s *,
const struct snd_pcm_hw_params *);
int (*set_fmt)(const struct sun4i_i2s *, unsigned int);
};
struct sun4i_i2s {
struct clk *bus_clk;
struct clk *mod_clk;
struct regmap *regmap;
struct reset_control *rst;
unsigned int mclk_freq;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
/* Register fields for i2s */
struct regmap_field *field_clkdiv_mclk_en;
struct regmap_field *field_fmt_wss;
struct regmap_field *field_fmt_sr;
const struct sun4i_i2s_quirks *variant;
};
struct sun4i_i2s_clk_div {
u8 div;
u8 val;
};
static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
{ .div = 2, .val = 0 },
{ .div = 4, .val = 1 },
{ .div = 6, .val = 2 },
{ .div = 8, .val = 3 },
{ .div = 12, .val = 4 },
{ .div = 16, .val = 5 },
/* TODO - extend divide ratio supported by newer SoCs */
};
static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
{ .div = 1, .val = 0 },
{ .div = 2, .val = 1 },
{ .div = 4, .val = 2 },
{ .div = 6, .val = 3 },
{ .div = 8, .val = 4 },
{ .div = 12, .val = 5 },
{ .div = 16, .val = 6 },
{ .div = 24, .val = 7 },
/* TODO - extend divide ratio supported by newer SoCs */
};
static const struct sun4i_i2s_clk_div sun8i_i2s_clk_div[] = {
{ .div = 1, .val = 1 },
{ .div = 2, .val = 2 },
{ .div = 4, .val = 3 },
{ .div = 6, .val = 4 },
{ .div = 8, .val = 5 },
{ .div = 12, .val = 6 },
{ .div = 16, .val = 7 },
{ .div = 24, .val = 8 },
{ .div = 32, .val = 9 },
{ .div = 48, .val = 10 },
{ .div = 64, .val = 11 },
{ .div = 96, .val = 12 },
{ .div = 128, .val = 13 },
{ .div = 176, .val = 14 },
{ .div = 192, .val = 15 },
};
static unsigned long sun4i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
{
return i2s->mclk_freq;
}
static unsigned long sun8i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
{
return clk_get_rate(i2s->mod_clk);
}
static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
unsigned long parent_rate,
unsigned int sampling_rate,
unsigned int word_size)
{
const struct sun4i_i2s_clk_div *dividers = i2s->variant->bclk_dividers;
int div = parent_rate / sampling_rate / word_size / 2;
int i;
for (i = 0; i < i2s->variant->num_bclk_dividers; i++) {
const struct sun4i_i2s_clk_div *bdiv = ÷rs[i];
if (bdiv->div == div)
return bdiv->val;
}
return -EINVAL;
}
static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
unsigned long parent_rate,
unsigned long mclk_rate)
{
const struct sun4i_i2s_clk_div *dividers = i2s->variant->mclk_dividers;
int div = parent_rate / mclk_rate;
int i;
for (i = 0; i < i2s->variant->num_mclk_dividers; i++) {
const struct sun4i_i2s_clk_div *mdiv = ÷rs[i];
if (mdiv->div == div)
return mdiv->val;
}
return -EINVAL;
}
static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
{
int i;
for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
if (sun4i_i2s_oversample_rates[i] == oversample)
return true;
return false;
}
static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,
unsigned int rate,
unsigned int word_size)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
unsigned int oversample_rate, clk_rate, bclk_parent_rate;
int bclk_div, mclk_div;
int ret;
switch (rate) {
case 176400:
case 88200:
case 44100:
case 22050:
case 11025:
clk_rate = 22579200;
break;
case 192000:
case 128000:
case 96000:
case 64000:
case 48000:
case 32000:
case 24000:
case 16000:
case 12000:
case 8000:
clk_rate = 24576000;
break;
default:
dev_err(dai->dev, "Unsupported sample rate: %u\n", rate);
return -EINVAL;
}
ret = clk_set_rate(i2s->mod_clk, clk_rate);
if (ret)
return ret;
oversample_rate = i2s->mclk_freq / rate;
if (!sun4i_i2s_oversample_is_valid(oversample_rate)) {
dev_err(dai->dev, "Unsupported oversample rate: %d\n",
oversample_rate);
return -EINVAL;
}
bclk_parent_rate = i2s->variant->get_bclk_parent_rate(i2s);
bclk_div = sun4i_i2s_get_bclk_div(i2s, bclk_parent_rate,
rate, word_size);
if (bclk_div < 0) {
dev_err(dai->dev, "Unsupported BCLK divider: %d\n", bclk_div);
return -EINVAL;
}
mclk_div = sun4i_i2s_get_mclk_div(i2s, clk_rate, i2s->mclk_freq);
if (mclk_div < 0) {
dev_err(dai->dev, "Unsupported MCLK divider: %d\n", mclk_div);
return -EINVAL;
}
regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
regmap_field_write(i2s->field_clkdiv_mclk_en, 1);
/* Set sync period */
if (i2s->variant->has_fmt_set_lrck_period)
regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
SUN8I_I2S_FMT0_LRCK_PERIOD(32));
return 0;
}
static s8 sun4i_i2s_get_sr(const struct sun4i_i2s *i2s, int width)
{
if (width < 16 || width > 24)
return -EINVAL;
if (width % 4)
return -EINVAL;
return (width - 16) / 4;
}
static s8 sun4i_i2s_get_wss(const struct sun4i_i2s *i2s, int width)
{
if (width < 16 || width > 32)
return -EINVAL;
if (width % 4)
return -EINVAL;
return (width - 16) / 4;
}
static s8 sun8i_i2s_get_sr_wss(const struct sun4i_i2s *i2s, int width)
{
if (width % 4)
return -EINVAL;
if (width < 8 || width > 32)
return -EINVAL;
return (width - 8) / 4 + 1;
}
static int sun4i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
const struct snd_pcm_hw_params *params)
{
unsigned int channels = params_channels(params);
if (channels != 2)
return -EINVAL;
/* Map the channels for playback and capture */
regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210);
regmap_write(i2s->regmap, SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210);
/* Configure the channels */
regmap_update_bits(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
SUN4I_I2S_CHAN_SEL_MASK,
SUN4I_I2S_CHAN_SEL(channels));
regmap_update_bits(i2s->regmap, SUN4I_I2S_RX_CHAN_SEL_REG,
SUN4I_I2S_CHAN_SEL_MASK,
SUN4I_I2S_CHAN_SEL(channels));
return 0;
}
static int sun8i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
const struct snd_pcm_hw_params *params)
{
unsigned int channels = params_channels(params);
if (channels != 2)
return -EINVAL;
/* Map the channels for playback and capture */
regmap_write(i2s->regmap, SUN8I_I2S_TX_CHAN_MAP_REG, 0x76543210);
regmap_write(i2s->regmap, SUN8I_I2S_RX_CHAN_MAP_REG, 0x76543210);
/* Configure the channels */
regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
SUN4I_I2S_CHAN_SEL_MASK,
SUN4I_I2S_CHAN_SEL(channels));
regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
SUN4I_I2S_CHAN_SEL_MASK,
SUN4I_I2S_CHAN_SEL(channels));
regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
SUN8I_I2S_TX_CHAN_EN_MASK,
SUN8I_I2S_TX_CHAN_EN(channels));
return 0;
}
static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
int ret, sr, wss;
u32 width;
ret = i2s->variant->set_chan_cfg(i2s, params);
if (ret < 0) {
dev_err(dai->dev, "Invalid channel configuration\n");
return ret;
}
switch (params_physical_width(params)) {
case 16:
width = DMA_SLAVE_BUSWIDTH_2_BYTES;
break;
default:
dev_err(dai->dev, "Unsupported physical sample width: %d\n",
params_physical_width(params));
return -EINVAL;
}
i2s->playback_dma_data.addr_width = width;
sr = i2s->variant->get_sr(i2s, params_width(params));
if (sr < 0)
return -EINVAL;
wss = i2s->variant->get_wss(i2s, params_width(params));
if (wss < 0)
return -EINVAL;
regmap_field_write(i2s->field_fmt_wss, wss);
regmap_field_write(i2s->field_fmt_sr, sr);
return sun4i_i2s_set_clk_rate(dai, params_rate(params),
params_width(params));
}
static int sun4i_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
unsigned int fmt)
{
u32 val;
/* DAI clock polarity */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
/* Invert both clocks */
val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED |
SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_IB_NF:
/* Invert bit clock */
val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_NB_IF:
/* Invert frame clock */
val = SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_NB_NF:
val = 0;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK |
SUN4I_I2S_FMT0_BCLK_POLARITY_MASK,
val);
/* DAI Mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
val = SUN4I_I2S_FMT0_FMT_I2S;
break;
case SND_SOC_DAIFMT_LEFT_J:
val = SUN4I_I2S_FMT0_FMT_LEFT_J;
break;
case SND_SOC_DAIFMT_RIGHT_J:
val = SUN4I_I2S_FMT0_FMT_RIGHT_J;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
SUN4I_I2S_FMT0_FMT_MASK, val);
/* DAI clock master masks */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
/* BCLK and LRCLK master */
val = SUN4I_I2S_CTRL_MODE_MASTER;
break;
case SND_SOC_DAIFMT_CBM_CFM:
/* BCLK and LRCLK slave */
val = SUN4I_I2S_CTRL_MODE_SLAVE;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_MODE_MASK, val);
return 0;
}
static int sun8i_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
unsigned int fmt)
{
u32 mode, val;
u8 offset;
/*
* DAI clock polarity
*
* The setup for LRCK contradicts the datasheet, but under a
* scope it's clear that the LRCK polarity is reversed
* compared to the expected polarity on the bus.
*/
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
/* Invert both clocks */
val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_IB_NF:
/* Invert bit clock */
val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED |
SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_NB_IF:
/* Invert frame clock */
val = 0;
break;
case SND_SOC_DAIFMT_NB_NF:
val = SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
SUN8I_I2S_FMT0_LRCLK_POLARITY_MASK |
SUN8I_I2S_FMT0_BCLK_POLARITY_MASK,
val);
/* DAI Mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
mode = SUN8I_I2S_CTRL_MODE_LEFT;
offset = 1;
break;
case SND_SOC_DAIFMT_LEFT_J:
mode = SUN8I_I2S_CTRL_MODE_LEFT;
offset = 0;
break;
case SND_SOC_DAIFMT_RIGHT_J:
mode = SUN8I_I2S_CTRL_MODE_RIGHT;
offset = 0;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN8I_I2S_CTRL_MODE_MASK, mode);
regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
SUN8I_I2S_TX_CHAN_OFFSET_MASK,
SUN8I_I2S_TX_CHAN_OFFSET(offset));
regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
SUN8I_I2S_TX_CHAN_OFFSET_MASK,
SUN8I_I2S_TX_CHAN_OFFSET(offset));
/* DAI clock master masks */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
/* BCLK and LRCLK master */
val = SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT;
break;
case SND_SOC_DAIFMT_CBM_CFM:
/* BCLK and LRCLK slave */
val = 0;
break;
default:
return -EINVAL;
}
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT,
val);
return 0;
}
static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
int ret;
ret = i2s->variant->set_fmt(i2s, fmt);
if (ret) {
dev_err(dai->dev, "Unsupported format configuration\n");
return ret;
}
/* Set significant bits in our FIFOs */
regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
return 0;
}
static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
{
/* Flush RX FIFO */
regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
/* Clear RX counter */
regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
/* Enable RX Block */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_RX_EN,
SUN4I_I2S_CTRL_RX_EN);
/* Enable RX DRQ */
regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
}
static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
{
/* Flush TX FIFO */
regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
/* Clear TX counter */
regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
/* Enable TX Block */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_TX_EN,
SUN4I_I2S_CTRL_TX_EN);
/* Enable TX DRQ */
regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
}
static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
{
/* Disable RX Block */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_RX_EN,
0);
/* Disable RX DRQ */
regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
0);
}
static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
{
/* Disable TX Block */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_TX_EN,
0);
/* Disable TX DRQ */
regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
0);
}
static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
sun4i_i2s_start_playback(i2s);
else
sun4i_i2s_start_capture(i2s);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
sun4i_i2s_stop_playback(i2s);
else
sun4i_i2s_stop_capture(i2s);
break;
default:
return -EINVAL;
}
return 0;
}
static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
if (clk_id != 0)
return -EINVAL;
i2s->mclk_freq = freq;
return 0;
}
static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
.hw_params = sun4i_i2s_hw_params,
.set_fmt = sun4i_i2s_set_fmt,
.set_sysclk = sun4i_i2s_set_sysclk,
.trigger = sun4i_i2s_trigger,
};
static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
snd_soc_dai_init_dma_data(dai,
&i2s->playback_dma_data,
&i2s->capture_dma_data);
snd_soc_dai_set_drvdata(dai, i2s);
return 0;
}
static struct snd_soc_dai_driver sun4i_i2s_dai = {
.probe = sun4i_i2s_dai_probe,
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &sun4i_i2s_dai_ops,
.symmetric_rates = 1,
};
static const struct snd_soc_component_driver sun4i_i2s_component = {
.name = "sun4i-dai",
};
static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SUN4I_I2S_FIFO_TX_REG:
return false;
default:
return true;
}
}
static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SUN4I_I2S_FIFO_RX_REG:
case SUN4I_I2S_FIFO_STA_REG:
return false;
default:
return true;
}
}
static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SUN4I_I2S_FIFO_RX_REG:
case SUN4I_I2S_INT_STA_REG:
case SUN4I_I2S_RX_CNT_REG:
case SUN4I_I2S_TX_CNT_REG:
return true;
default:
return false;
}
}
static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SUN8I_I2S_FIFO_TX_REG:
return false;
default:
return true;
}
}
static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
{
if (reg == SUN8I_I2S_INT_STA_REG)
return true;
if (reg == SUN8I_I2S_FIFO_TX_REG)
return false;
return sun4i_i2s_volatile_reg(dev, reg);
}
static const struct reg_default sun4i_i2s_reg_defaults[] = {
{ SUN4I_I2S_CTRL_REG, 0x00000000 },
{ SUN4I_I2S_FMT0_REG, 0x0000000c },
{ SUN4I_I2S_FMT1_REG, 0x00004020 },
{ SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
{ SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
{ SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
{ SUN4I_I2S_TX_CHAN_SEL_REG, 0x00000001 },
{ SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210 },
{ SUN4I_I2S_RX_CHAN_SEL_REG, 0x00000001 },
{ SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210 },
};
static const struct reg_default sun8i_i2s_reg_defaults[] = {
{ SUN4I_I2S_CTRL_REG, 0x00060000 },
{ SUN4I_I2S_FMT0_REG, 0x00000033 },
{ SUN4I_I2S_FMT1_REG, 0x00000030 },
{ SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
{ SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
{ SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
{ SUN8I_I2S_CHAN_CFG_REG, 0x00000000 },
{ SUN8I_I2S_TX_CHAN_SEL_REG, 0x00000000 },
{ SUN8I_I2S_TX_CHAN_MAP_REG, 0x00000000 },
{ SUN8I_I2S_RX_CHAN_SEL_REG, 0x00000000 },
{ SUN8I_I2S_RX_CHAN_MAP_REG, 0x00000000 },
};
static const struct regmap_config sun4i_i2s_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = SUN4I_I2S_RX_CHAN_MAP_REG,
.cache_type = REGCACHE_FLAT,
.reg_defaults = sun4i_i2s_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(sun4i_i2s_reg_defaults),
.writeable_reg = sun4i_i2s_wr_reg,
.readable_reg = sun4i_i2s_rd_reg,
.volatile_reg = sun4i_i2s_volatile_reg,
};
static const struct regmap_config sun8i_i2s_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = SUN8I_I2S_RX_CHAN_MAP_REG,
.cache_type = REGCACHE_FLAT,
.reg_defaults = sun8i_i2s_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(sun8i_i2s_reg_defaults),
.writeable_reg = sun4i_i2s_wr_reg,
.readable_reg = sun8i_i2s_rd_reg,
.volatile_reg = sun8i_i2s_volatile_reg,
};
static int sun4i_i2s_runtime_resume(struct device *dev)
{
struct sun4i_i2s *i2s = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(i2s->bus_clk);
if (ret) {
dev_err(dev, "Failed to enable bus clock\n");
return ret;
}
regcache_cache_only(i2s->regmap, false);
regcache_mark_dirty(i2s->regmap);
ret = regcache_sync(i2s->regmap);
if (ret) {
dev_err(dev, "Failed to sync regmap cache\n");
goto err_disable_clk;
}
/* Enable the whole hardware block */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
/* Enable the first output line */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_SDO_EN_MASK,
SUN4I_I2S_CTRL_SDO_EN(0));
ret = clk_prepare_enable(i2s->mod_clk);
if (ret) {
dev_err(dev, "Failed to enable module clock\n");
goto err_disable_clk;
}
return 0;
err_disable_clk:
clk_disable_unprepare(i2s->bus_clk);
return ret;
}
static int sun4i_i2s_runtime_suspend(struct device *dev)
{
struct sun4i_i2s *i2s = dev_get_drvdata(dev);
clk_disable_unprepare(i2s->mod_clk);
/* Disable our output lines */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
/* Disable the whole hardware block */
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,