[PATCH v2 0/2] ASoC: Add I2S support for Allwinner H3 SoCs

Discussion:

c***@gmail.com

2017-07-22 06:53:50 UTC

From: Marcus Cooper <***@gmail.com>

Hi All,
please find attached a series of patches to bring i2s support to the
Allwinner H3 SoC. This has been tested with the following setups:

A20 Olimex EVB connected to a pcm5102
Orange Pi 2 connected to a uda1380
Orange Pi 2 hdmi audio playback
Pine 64 connected to the audio DAC board

To get i2s working some additional patches are required which will be
delivered later. For now they have been pushed here

https://github.com/codekipper/linux-sunxi/commits/sunxi-audio-h3

I don't own a A33 device which uses the i2s block for the audio codec
so if someone could test against that it would be much appreciated.

I'm also wondering if there is a preferred way of setting the lrclk
size in the dts?..currently it is set to the sample width but for example
the pcm5102a wants it to be 32 bits whatever the sample rate.

Thanks in advance,
CK

v2 changes compared to v1 are:
- massive refactoring to remove duplicate code making use of regmap_fields.
- extending the clock divisors.
- removed code that should be delivered when we support 20/24bits

---

Marcus Cooper (2):
ASoC: sun4i-i2s: Add more quirks for newer SoCs
ASoC: sun4i-i2s: Add support for H3

.../devicetree/bindings/sound/sun4i-i2s.txt | 2 +
sound/soc/sunxi/sun4i-i2s.c | 469 ++++++++++++++++++---
2 files changed, 407 insertions(+), 64 deletions(-)

--
2.13.3

c***@gmail.com

2017-07-22 06:53:51 UTC

Permalink

From: Marcus Cooper <***@gmail.com>

In preparation for changing this driver to support newer SoC
implementations then where needed there has been a switch from
regmap_update_bits to regmap_field. Also included are adjustment
variables although they are not set as no adjustment is required
for the current support.

Signed-off-by: Marcus Cooper <***@gmail.com>
---
sound/soc/sunxi/sun4i-i2s.c | 267 +++++++++++++++++++++++++++++++++-----------
1 file changed, 203 insertions(+), 64 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 62b307b0c846..1854405cbcb1 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -50,6 +50,8 @@
#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_FMT0_POLARITY_INVERTED (1)
+#define SUN4I_I2S_FMT0_POLARITY_NORMAL (0)

#define SUN4I_I2S_FMT1_REG 0x08
#define SUN4I_I2S_FIFO_TX_REG 0x0c
@@ -72,7 +74,7 @@
#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_MCLK_EN 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)
@@ -82,15 +84,39 @@
#define SUN4I_I2S_TX_CNT_REG 0x2c

#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
-#define SUN4I_I2S_TX_CHAN_SEL(num_chan) (((num_chan) - 1) << 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_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1))

#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c

+struct sun4i_i2s_quirks {
+ bool has_reset;
+ bool has_master_slave_sel;
+ unsigned int reg_offset_txdata; /* TX FIFO */
+ unsigned int reg_offset_txchanmap;
+ unsigned int reg_offset_rxchanmap;
+ const struct regmap_config *sun4i_i2s_regmap;
+ unsigned int mclk_adjust;
+ unsigned int bclk_adjust;
+ unsigned int fmt_adjust;
+
+ /* Register fields for i2s */
+ struct reg_field field_clkdiv_mclk_en;
+ struct reg_field field_fmt_set_wss;
+ struct reg_field field_fmt_set_sr;
+ struct reg_field field_fmt_set_bclk_polarity;
+ struct reg_field field_fmt_set_lrclk_polarity;
+ struct reg_field field_fmt_set_mode;
+ struct reg_field field_txchansel;
+ struct reg_field field_rxchansel;
+};
+
struct sun4i_i2s {
+ struct device *dev;
struct clk *bus_clk;
struct clk *mod_clk;
struct regmap *regmap;
@@ -100,6 +126,18 @@ struct sun4i_i2s {

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_set_wss;
+ struct regmap_field *field_fmt_set_sr;
+ struct regmap_field *field_fmt_set_bclk_polarity;
+ struct regmap_field *field_fmt_set_lrclk_polarity;
+ struct regmap_field *field_fmt_set_mode;
+ struct regmap_field *field_txchansel;
+ struct regmap_field *field_rxchansel;
+
+ const struct sun4i_i2s_quirks *variant;
};

struct sun4i_i2s_clk_div {
@@ -138,7 +176,7 @@ static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
const struct sun4i_i2s_clk_div *bdiv = &sun4i_i2s_bclk_div[i];

if (bdiv->div == div)
- return bdiv->val;
+ return bdiv->val + i2s->variant->bclk_adjust;
}

return -EINVAL;
@@ -156,7 +194,7 @@ static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
const struct sun4i_i2s_clk_div *mdiv = &sun4i_i2s_mclk_div[i];

if (mdiv->div == div)
- return mdiv->val;
+ return mdiv->val + i2s->variant->mclk_adjust;
}

return -EINVAL;
@@ -228,8 +266,9 @@ static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,

regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
- SUN4I_I2S_CLK_DIV_MCLK(mclk_div) |
- SUN4I_I2S_CLK_DIV_MCLK_EN);
+ SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
+
+ regmap_field_write(i2s->field_clkdiv_mclk_en, 1);

return 0;
}
@@ -245,6 +284,22 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
if (params_channels(params) != 2)
return -EINVAL;

+ /* Map the channels for playback */
+ regmap_write(i2s->regmap, i2s->variant->reg_offset_txchanmap,
+ 0x76543210);
+
+ /* Map the channels for capture */
+ regmap_write(i2s->regmap, i2s->variant->reg_offset_rxchanmap,
+ 0x00003210);
+
+ /* Configure the channels */
+ regmap_field_write(i2s->field_txchansel,
+ SUN4I_I2S_CHAN_SEL(params_channels(params)));
+
+ regmap_field_write(i2s->field_rxchansel,
+ SUN4I_I2S_CHAN_SEL(params_channels(params)));
+
+
switch (params_physical_width(params)) {
case 16:
width = DMA_SLAVE_BUSWIDTH_2_BYTES;
@@ -264,9 +319,10 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}

- regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
- SUN4I_I2S_FMT0_WSS_MASK | SUN4I_I2S_FMT0_SR_MASK,
- SUN4I_I2S_FMT0_WSS(wss) | SUN4I_I2S_FMT0_SR(sr));
+ regmap_field_write(i2s->field_fmt_set_wss,
+ wss + i2s->variant->fmt_adjust);
+ regmap_field_write(i2s->field_fmt_set_sr,
+ sr + i2s->variant->fmt_adjust);

return sun4i_i2s_set_clk_rate(i2s, params_rate(params),
params_width(params));
@@ -276,6 +332,8 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
u32 val;
+ u32 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
+ u32 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;

/* DAI Mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
@@ -292,65 +350,58 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
return -EINVAL;
}

- regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
- SUN4I_I2S_FMT0_FMT_MASK,
- val);
+ regmap_field_write(i2s->field_fmt_set_mode, 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;
+ bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
+ lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_IB_NF:
/* Invert bit clock */
- val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED |
- SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL;
+ bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_NB_IF:
/* Invert frame clock */
- val = SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED |
- SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL;
+ lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
break;
case SND_SOC_DAIFMT_NB_NF:
- /* Nothing to do for both normal cases */
- val = SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL |
- SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL;
break;
default:
return -EINVAL;
}

- regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
- SUN4I_I2S_FMT0_BCLK_POLARITY_MASK |
- SUN4I_I2S_FMT0_LRCLK_POLARITY_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_field_write(i2s->field_fmt_set_bclk_polarity, bclk_polarity);
+ regmap_field_write(i2s->field_fmt_set_lrclk_polarity, lrclk_polarity);
+
+ if (i2s->variant->has_master_slave_sel) {
+ /* 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);
}

- regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
- SUN4I_I2S_CTRL_MODE_MASK,
- val);
-
/* 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;
}

@@ -457,23 +508,24 @@ static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct device *dev = rtd->card->dev;
+ int ret = 0;

/* Enable the whole hardware block */
- regmap_write(i2s->regmap, SUN4I_I2S_CTRL_REG,
- SUN4I_I2S_CTRL_GL_EN);
+ 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));

- /* Enable the first two channels */
- regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
- SUN4I_I2S_TX_CHAN_SEL(2));
-
- /* Map them to the two first samples coming in */
- regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG,
- SUN4I_I2S_TX_CHAN_MAP(0, 0) | SUN4I_I2S_TX_CHAN_MAP(1, 1));
+ ret = snd_soc_dai_set_fmt(rtd->cpu_dai, rtd->dai_link->dai_fmt);
+ if (ret < 0) {
+ dev_err(dev, "can't set cpu_dai set fmt: %d\n", ret);
+ return ret;
+ }

return clk_prepare_enable(i2s->mod_clk);
}
@@ -490,7 +542,8 @@ static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
SUN4I_I2S_CTRL_SDO_EN_MASK, 0);

/* Disable the whole hardware block */
- regmap_write(i2s->regmap, SUN4I_I2S_CTRL_REG, 0);
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_GL_EN, 0);
}

static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
@@ -654,22 +707,100 @@ static int sun4i_i2s_runtime_suspend(struct device *dev)
return 0;
}

-struct sun4i_i2s_quirks {
- bool has_reset;
-};
-
static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
- .has_reset = false,
+ .has_reset = false,
+ .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
+ .reg_offset_txchanmap = SUN4I_I2S_TX_CHAN_MAP_REG,
+ .reg_offset_rxchanmap = SUN4I_I2S_RX_CHAN_MAP_REG,
+ .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
+ .has_master_slave_sel = true,
+ .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG,
+ SUN4I_I2S_CLK_DIV_MCLK_EN,
+ SUN4I_I2S_CLK_DIV_MCLK_EN),
+ .field_fmt_set_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
+ .field_fmt_set_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
+ .field_fmt_set_bclk_polarity = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
+ .field_fmt_set_lrclk_polarity = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .field_fmt_set_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
+ .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
};

static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
- .has_reset = true,
+ .has_reset = true,
+ .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
+ .reg_offset_txchanmap = SUN4I_I2S_TX_CHAN_MAP_REG,
+ .reg_offset_rxchanmap = SUN4I_I2S_RX_CHAN_MAP_REG,
+ .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
+ .has_master_slave_sel = true,
+ .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG,
+ SUN4I_I2S_CLK_DIV_MCLK_EN,
+ SUN4I_I2S_CLK_DIV_MCLK_EN),
+ .field_fmt_set_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
+ .field_fmt_set_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
+ .field_fmt_set_bclk_polarity = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
+ .field_fmt_set_lrclk_polarity = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .field_fmt_set_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
+ .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
};

+static int sun4i_i2s_init_regmap_fields(struct sun4i_i2s *i2s)
+{
+ i2s->field_fmt_set_wss =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_fmt_set_wss);
+ if (IS_ERR(i2s->field_fmt_set_wss))
+ return PTR_ERR(i2s->field_fmt_set_wss);
+
+ i2s->field_fmt_set_sr =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_fmt_set_sr);
+ if (IS_ERR(i2s->field_fmt_set_sr))
+ return PTR_ERR(i2s->field_fmt_set_sr);
+
+ i2s->field_fmt_set_bclk_polarity =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_fmt_set_bclk_polarity);
+ if (IS_ERR(i2s->field_fmt_set_bclk_polarity))
+ return PTR_ERR(i2s->field_fmt_set_bclk_polarity);
+
+ i2s->field_fmt_set_lrclk_polarity =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_fmt_set_lrclk_polarity);
+ if (IS_ERR(i2s->field_fmt_set_lrclk_polarity))
+ return PTR_ERR(i2s->field_fmt_set_lrclk_polarity);
+
+ i2s->field_fmt_set_mode =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_fmt_set_mode);
+ if (IS_ERR(i2s->field_fmt_set_mode))
+ return PTR_ERR(i2s->field_fmt_set_mode);
+
+ i2s->field_clkdiv_mclk_en =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_clkdiv_mclk_en);
+ if (IS_ERR(i2s->field_clkdiv_mclk_en))
+ return PTR_ERR(i2s->field_clkdiv_mclk_en);
+
+ i2s->field_txchansel =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_txchansel);
+ if (IS_ERR(i2s->field_txchansel))
+ return PTR_ERR(i2s->field_txchansel);
+
+ i2s->field_rxchansel =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_rxchansel);
+ if (IS_ERR(i2s->field_rxchansel))
+ return PTR_ERR(i2s->field_rxchansel);
+
+ return 0;
+}
+
static int sun4i_i2s_probe(struct platform_device *pdev)
{
struct sun4i_i2s *i2s;
- const struct sun4i_i2s_quirks *quirks;
struct resource *res;
void __iomem *regs;
int irq, ret;
@@ -678,6 +809,7 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
if (!i2s)
return -ENOMEM;
platform_set_drvdata(pdev, i2s);
+ i2s->dev = &pdev->dev;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
regs = devm_ioremap_resource(&pdev->dev, res);
@@ -690,8 +822,8 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
return irq;
}

- quirks = of_device_get_match_data(&pdev->dev);
- if (!quirks) {
+ i2s->variant = of_device_get_match_data(&pdev->dev);
+ if (!i2s->variant) {
dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
return -ENODEV;
}
@@ -703,7 +835,7 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
}

i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
- &sun4i_i2s_regmap_config);
+ i2s->variant->sun4i_i2s_regmap);
if (IS_ERR(i2s->regmap)) {
dev_err(&pdev->dev, "Regmap initialisation failed\n");
return PTR_ERR(i2s->regmap);
@@ -715,7 +847,7 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
return PTR_ERR(i2s->mod_clk);
}

- if (quirks->has_reset) {
+ if (i2s->variant->has_reset) {
i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
if (IS_ERR(i2s->rst)) {
dev_err(&pdev->dev, "Failed to get reset control\n");
@@ -732,7 +864,8 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
}
}

- i2s->playback_dma_data.addr = res->start + SUN4I_I2S_FIFO_TX_REG;
+ i2s->playback_dma_data.addr = res->start +
+ i2s->variant->reg_offset_txdata;
i2s->playback_dma_data.maxburst = 8;

i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
@@ -759,6 +892,12 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
goto err_suspend;
}

+ ret = sun4i_i2s_init_regmap_fields(i2s);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not initialise regmap fields\n");
+ goto err_suspend;
+ }
+
return 0;

err_suspend:

--
2.13.3

Maxime Ripard

2017-07-25 05:52:55 UTC

Permalink

Hi Markus,

Post by c***@gmail.com
In preparation for changing this driver to support newer SoC
implementations then where needed there has been a switch from
regmap_update_bits to regmap_field. Also included are adjustment
variables although they are not set as no adjustment is required
for the current support.
---
sound/soc/sunxi/sun4i-i2s.c | 267 +++++++++++++++++++++++++++++++++-----------
1 file changed, 203 insertions(+), 64 deletions(-)
diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 62b307b0c846..1854405cbcb1 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -50,6 +50,8 @@
#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_FMT0_POLARITY_INVERTED (1)
+#define SUN4I_I2S_FMT0_POLARITY_NORMAL (0)
#define SUN4I_I2S_FMT1_REG 0x08
#define SUN4I_I2S_FIFO_TX_REG 0x0c
@@ -72,7 +74,7 @@
#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_MCLK_EN 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)
@@ -82,15 +84,39 @@
#define SUN4I_I2S_TX_CNT_REG 0x2c
#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
-#define SUN4I_I2S_TX_CHAN_SEL(num_chan) (((num_chan) - 1) << 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_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1))
#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
+struct sun4i_i2s_quirks {
+ bool has_reset;
+ bool has_master_slave_sel;

I think both variants have a master and slave mode, so it's a bit
misleading.

You should also have a kerneldoc for that structure, to make it clear
what each quirk is supposed to be doing.

Post by c***@gmail.com
+ unsigned int reg_offset_txdata; /* TX FIFO */
+ unsigned int reg_offset_txchanmap;
+ unsigned int reg_offset_rxchanmap;

Is there any reason for txchanmap and rxchanmap to not be
regmap_fields too?

Post by c***@gmail.com
+ const struct regmap_config *sun4i_i2s_regmap;
+ unsigned int mclk_adjust;
+ unsigned int bclk_adjust;
+ unsigned int fmt_adjust;

I would replace adjust by offset

Post by c***@gmail.com
+ /* Register fields for i2s */
+ struct reg_field field_clkdiv_mclk_en;
+ struct reg_field field_fmt_set_wss;
+ struct reg_field field_fmt_set_sr;
+ struct reg_field field_fmt_set_bclk_polarity;
+ struct reg_field field_fmt_set_lrclk_polarity;
+ struct reg_field field_fmt_set_mode;
+ struct reg_field field_txchansel;
+ struct reg_field field_rxchansel;
+};
+
struct sun4i_i2s {
+ struct device *dev;

You never use it outside of the probe function (and its callee), you
can just pass it directly as an argument

Post by c***@gmail.com
struct clk *bus_clk;
struct clk *mod_clk;
struct regmap *regmap;
@@ -100,6 +126,18 @@ struct sun4i_i2s {
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_set_wss;
+ struct regmap_field *field_fmt_set_sr;
+ struct regmap_field *field_fmt_set_bclk_polarity;
+ struct regmap_field *field_fmt_set_lrclk_polarity;
+ struct regmap_field *field_fmt_set_mode;
+ struct regmap_field *field_txchansel;
+ struct regmap_field *field_rxchansel;
+
+ const struct sun4i_i2s_quirks *variant;
};
struct sun4i_i2s_clk_div {
@@ -138,7 +176,7 @@ static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
const struct sun4i_i2s_clk_div *bdiv = &sun4i_i2s_bclk_div[i];
if (bdiv->div == div)
- return bdiv->val;
+ return bdiv->val + i2s->variant->bclk_adjust;
}
return -EINVAL;
@@ -156,7 +194,7 @@ static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
const struct sun4i_i2s_clk_div *mdiv = &sun4i_i2s_mclk_div[i];
if (mdiv->div == div)
- return mdiv->val;
+ return mdiv->val + i2s->variant->mclk_adjust;

Could you split all that work to make it a bit easier to review?

You could do so by adding the various quirks in several steps, like
first the adjusts/offsets, then the regmap_fields then the TX FIFO
(and I guess RX too?), etc.

It looks much better otherwise, thanks!
Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Code Kipper

2017-07-25 06:08:38 UTC

Permalink

On 25 July 2017 at 07:52, Maxime Ripard

Post by Maxime Ripard
Hi Markus,

I think both variants have a master and slave mode, so it's a bit
misleading.
You should also have a kerneldoc for that structure, to make it clear
what each quirk is supposed to be doing.

Post by c***@gmail.com
+ unsigned int reg_offset_txdata; /* TX FIFO */
+ unsigned int reg_offset_txchanmap;
+ unsigned int reg_offset_rxchanmap;

Is there any reason for txchanmap and rxchanmap to not be
regmap_fields too?

Post by c***@gmail.com
+ const struct regmap_config *sun4i_i2s_regmap;
+ unsigned int mclk_adjust;
+ unsigned int bclk_adjust;
+ unsigned int fmt_adjust;

I would replace adjust by offset

You never use it outside of the probe function (and its callee), you
can just pass it directly as an argument

Could you split all that work to make it a bit easier to review?
You could do so by adding the various quirks in several steps, like
first the adjusts/offsets, then the regmap_fields then the TX FIFO
(and I guess RX too?), etc.
It looks much better otherwise, thanks!

Sure....thanks for your comments and I'll get back with a new patch series ASAP.
CK

Post by Maxime Ripard
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

c***@gmail.com

2017-07-22 06:53:52 UTC

Permalink

From: Marcus Cooper <***@gmail.com>

The sun8i-h3 introduces a lot of changes to the i2s block such
as different register locations, extended clock division and
more operational modes. As we have to consider the earlier
implementation then these changes need to be isolated.

Signed-off-by: Marcus Cooper <***@gmail.com>
---
.../devicetree/bindings/sound/sun4i-i2s.txt | 2 +
sound/soc/sunxi/sun4i-i2s.c | 202 +++++++++++++++++++++
2 files changed, 204 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
index ee21da865771..fc5da6080759 100644
--- a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
@@ -8,6 +8,7 @@ Required properties:
- compatible: should be one of the following:
- "allwinner,sun4i-a10-i2s"
- "allwinner,sun6i-a31-i2s"
+ - "allwinner,sun8i-h3-i2s"
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: should contain the I2S interrupt.
@@ -22,6 +23,7 @@ Required properties:

Required properties for the following compatibles:
- "allwinner,sun6i-a31-i2s"
+ - "allwinner,sun8i-h3-i2s"
- resets: phandle to the reset line for this codec

Example:
diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 1854405cbcb1..2b3c2b28059c 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -26,6 +26,8 @@
#include <sound/soc-dai.h>

#define SUN4I_I2S_CTRL_REG 0x00
+#define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
+#define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
#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)
@@ -55,6 +57,7 @@

#define SUN4I_I2S_FMT1_REG 0x08
#define SUN4I_I2S_FIFO_TX_REG 0x0c
+#define SUN8I_I2S_INT_STA_REG 0x0c
#define SUN4I_I2S_FIFO_RX_REG 0x10

#define SUN4I_I2S_FIFO_CTRL_REG 0x14
@@ -72,8 +75,10 @@
#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)

#define SUN4I_I2S_INT_STA_REG 0x20
+#define SUN8I_I2S_FIFO_TX_REG 0x20

#define SUN4I_I2S_CLK_DIV_REG 0x24
+#define SUN8I_I2S_CLK_DIV_MCLK_EN 8
#define SUN4I_I2S_CLK_DIV_MCLK_EN 7
#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
@@ -86,16 +91,29 @@
#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)

+#define SUN8I_I2S_CHAN_CFG_REG 0x30
+
#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
+#define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
+#define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
#define SUN4I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1))

#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c

+#define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
+
+#define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
+#define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
+
struct sun4i_i2s_quirks {
bool has_reset;
bool has_master_slave_sel;
+ bool has_fmt_set_lrck_period;
+ bool has_chcfg;
+ bool has_chsel_tx_chen;
+ bool has_chsel_offset;
unsigned int reg_offset_txdata; /* TX FIFO */
unsigned int reg_offset_txchanmap;
unsigned int reg_offset_rxchanmap;
@@ -113,6 +131,11 @@ struct sun4i_i2s_quirks {
struct reg_field field_fmt_set_mode;
struct reg_field field_txchansel;
struct reg_field field_rxchansel;
+ struct reg_field field_fmt_set_lrck_period;
+ struct reg_field field_chcfg_tx_slot_num;
+ struct reg_field field_chcfg_rx_slot_num;
+ struct reg_field field_chsel_tx_chen;
+ struct reg_field field_chsel_offset;
};

struct sun4i_i2s {
@@ -136,6 +159,11 @@ struct sun4i_i2s {
struct regmap_field *field_fmt_set_mode;
struct regmap_field *field_txchansel;
struct regmap_field *field_rxchansel;
+ struct regmap_field *field_fmt_set_lrck_period;
+ struct regmap_field *field_chcfg_tx_slot_num;
+ struct regmap_field *field_chcfg_rx_slot_num;
+ struct regmap_field *field_chsel_tx_chen;
+ struct regmap_field *field_chsel_offset;

const struct sun4i_i2s_quirks *variant;
};
@@ -152,6 +180,14 @@ static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
{ .div = 8, .val = 3 },
{ .div = 12, .val = 4 },
{ .div = 16, .val = 5 },
+ { .div = 24, .val = 6 },
+ { .div = 32, .val = 7 },
+ { .div = 48, .val = 8 },
+ { .div = 64, .val = 9 },
+ { .div = 96, .val = 10 },
+ { .div = 128, .val = 11 },
+ { .div = 176, .val = 12 },
+ { .div = 192, .val = 13 },
};

static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
@@ -163,6 +199,13 @@ static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
{ .div = 12, .val = 5 },
{ .div = 16, .val = 6 },
{ .div = 24, .val = 7 },
+ { .div = 32, .val = 8 },
+ { .div = 48, .val = 9 },
+ { .div = 64, .val = 10 },
+ { .div = 96, .val = 11 },
+ { .div = 128, .val = 12 },
+ { .div = 176, .val = 13 },
+ { .div = 192, .val = 14 },
};

static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
@@ -270,6 +313,10 @@ static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,

regmap_field_write(i2s->field_clkdiv_mclk_en, 1);

+ /* Set sync period */
+ if (i2s->variant->has_fmt_set_lrck_period)
+ regmap_field_write(i2s->field_fmt_set_lrck_period, 0x1f);
+
return 0;
}

@@ -284,6 +331,13 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
if (params_channels(params) != 2)
return -EINVAL;

+ if (i2s->variant->has_chcfg) {
+ regmap_field_write(i2s->field_chcfg_tx_slot_num,
+ params_channels(params) - 1);
+ regmap_field_write(i2s->field_chcfg_rx_slot_num,
+ params_channels(params) - 1);
+ }
+
/* Map the channels for playback */
regmap_write(i2s->regmap, i2s->variant->reg_offset_txchanmap,
0x76543210);
@@ -299,6 +353,9 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
regmap_field_write(i2s->field_rxchansel,
SUN4I_I2S_CHAN_SEL(params_channels(params)));

+ if (i2s->variant->has_chsel_tx_chen)
+ regmap_field_write(i2s->field_chsel_tx_chen,
+ SUN4I_I2S_TX_CHAN_EN(params_channels(params)));

switch (params_physical_width(params)) {
case 16:
@@ -332,6 +389,7 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
u32 val;
+ u32 offset = 0;
u32 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
u32 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;

@@ -339,6 +397,7 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
val = SUN4I_I2S_FMT0_FMT_I2S;
+ offset = 1;
break;
case SND_SOC_DAIFMT_LEFT_J:
val = SUN4I_I2S_FMT0_FMT_LEFT_J;
@@ -350,6 +409,19 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
return -EINVAL;
}

+ if (i2s->variant->has_chsel_offset) {
+ /*
+ * offset being set indicates that we're connected to an i2s
+ * device, however offset is only used on the sun8i block and
+ * i2s shares the same setting with the LJ format. Increment
+ * val so that the bit to value to write is correct.
+ */
+ if (offset > 0)
+ val++;
+ /* blck offset determines whether i2s or LJ */
+ regmap_field_write(i2s->field_chsel_offset, offset);
+ }
+
regmap_field_write(i2s->field_fmt_set_mode, val);

/* DAI clock polarity */
@@ -393,6 +465,29 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_MODE_MASK,
val);
+ } else {
+ /*
+ * The newer i2s block does not have a slave select bit,
+ * instead the clk pins are configured as inputs.
+ */
+ /* 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);
}

/* Set significant bits in our FIFOs */
@@ -642,6 +737,15 @@ static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
}
}

+static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
+{
+
+ if (reg == SUN8I_I2S_INT_STA_REG)
+ return true;
+
+ 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 },
@@ -655,6 +759,20 @@ static const struct reg_default sun4i_i2s_reg_defaults[] = {
{ 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,
@@ -669,6 +787,19 @@ static const struct regmap_config sun4i_i2s_regmap_config = {
.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 = sun4i_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);
@@ -745,6 +876,36 @@ static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
.field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
};

+static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
+ .has_reset = true,
+ .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
+ .reg_offset_txchanmap = SUN8I_I2S_TX_CHAN_MAP_REG,
+ .reg_offset_rxchanmap = SUN8I_I2S_RX_CHAN_MAP_REG,
+ .sun4i_i2s_regmap = &sun8i_i2s_regmap_config,
+ .mclk_adjust = 1,
+ .bclk_adjust = 2,
+ .fmt_adjust = 3,
+ .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG,
+ SUN8I_I2S_CLK_DIV_MCLK_EN,
+ SUN8I_I2S_CLK_DIV_MCLK_EN),
+ .has_fmt_set_lrck_period = true,
+ .field_fmt_set_lrck_period = REG_FIELD(SUN4I_I2S_FMT0_REG, 8, 17),
+ .has_chcfg = true,
+ .field_chcfg_tx_slot_num = REG_FIELD(SUN8I_I2S_CHAN_CFG_REG, 0, 2),
+ .field_chcfg_rx_slot_num = REG_FIELD(SUN8I_I2S_CHAN_CFG_REG, 4, 6),
+ .has_chsel_tx_chen = true,
+ .field_chsel_tx_chen = REG_FIELD(SUN8I_I2S_TX_CHAN_SEL_REG, 4, 11),
+ .has_chsel_offset = true,
+ .field_chsel_offset = REG_FIELD(SUN8I_I2S_TX_CHAN_SEL_REG, 12, 13),
+ .field_fmt_set_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
+ .field_fmt_set_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
+ .field_fmt_set_bclk_polarity = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .field_fmt_set_lrclk_polarity = REG_FIELD(SUN4I_I2S_FMT0_REG, 19, 19),
+ .field_fmt_set_mode = REG_FIELD(SUN4I_I2S_CTRL_REG, 4, 5),
+ .field_txchansel = REG_FIELD(SUN8I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN8I_I2S_RX_CHAN_SEL_REG, 0, 2),
+};
+
static int sun4i_i2s_init_regmap_fields(struct sun4i_i2s *i2s)
{
i2s->field_fmt_set_wss =
@@ -795,6 +956,43 @@ static int sun4i_i2s_init_regmap_fields(struct sun4i_i2s *i2s)
if (IS_ERR(i2s->field_rxchansel))
return PTR_ERR(i2s->field_rxchansel);

+ if (i2s->variant->has_fmt_set_lrck_period) {
+ i2s->field_fmt_set_lrck_period =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_fmt_set_lrck_period);
+ if (IS_ERR(i2s->field_fmt_set_lrck_period))
+ return PTR_ERR(i2s->field_fmt_set_lrck_period);
+ }
+
+ if (i2s->variant->has_chcfg) {
+ i2s->field_chcfg_tx_slot_num =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_chcfg_tx_slot_num);
+ if (IS_ERR(i2s->field_chcfg_tx_slot_num))
+ return PTR_ERR(i2s->field_chcfg_tx_slot_num);
+ i2s->field_chcfg_rx_slot_num =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_chcfg_rx_slot_num);
+ if (IS_ERR(i2s->field_chcfg_rx_slot_num))
+ return PTR_ERR(i2s->field_chcfg_rx_slot_num);
+ }
+
+ if (i2s->variant->has_chsel_tx_chen) {
+ i2s->field_chsel_tx_chen =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_chsel_tx_chen);
+ if (IS_ERR(i2s->field_chsel_tx_chen))
+ return PTR_ERR(i2s->field_chsel_tx_chen);
+ }
+
+ if (i2s->variant->has_chsel_offset) {
+ i2s->field_chsel_offset =
+ devm_regmap_field_alloc(i2s->dev, i2s->regmap,
+ i2s->variant->field_chsel_offset);
+ if (IS_ERR(i2s->field_chsel_offset))
+ return PTR_ERR(i2s->field_chsel_offset);
+ }
+
return 0;
}

@@ -936,6 +1134,10 @@ static const struct of_device_id sun4i_i2s_match[] = {
.compatible = "allwinner,sun6i-a31-i2s",
.data = &sun6i_a31_i2s_quirks,
},
+ {
+ .compatible = "allwinner,sun8i-h3-i2s",
+ .data = &sun8i_h3_i2s_quirks,
+ },
{}
};
MODULE_DEVICE_TABLE(of, sun4i_i2s_match);

--
2.13.3

Maxime Ripard

2017-07-25 14:36:46 UTC

Permalink

Hi,

Post by c***@gmail.com
The sun8i-h3 introduces a lot of changes to the i2s block such
as different register locations, extended clock division and
more operational modes. As we have to consider the earlier
implementation then these changes need to be isolated.
---
.../devicetree/bindings/sound/sun4i-i2s.txt | 2 +
sound/soc/sunxi/sun4i-i2s.c | 202 +++++++++++++++++++++
2 files changed, 204 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
index ee21da865771..fc5da6080759 100644
--- a/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/sun4i-i2s.txt
- "allwinner,sun4i-a10-i2s"
- "allwinner,sun6i-a31-i2s"
+ - "allwinner,sun8i-h3-i2s"
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: should contain the I2S interrupt.
- "allwinner,sun6i-a31-i2s"
+ - "allwinner,sun8i-h3-i2s"
- resets: phandle to the reset line for this codec
diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 1854405cbcb1..2b3c2b28059c 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -26,6 +26,8 @@
#include <sound/soc-dai.h>
#define SUN4I_I2S_CTRL_REG 0x00
+#define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
+#define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
#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)
@@ -55,6 +57,7 @@
#define SUN4I_I2S_FMT1_REG 0x08
#define SUN4I_I2S_FIFO_TX_REG 0x0c
+#define SUN8I_I2S_INT_STA_REG 0x0c
#define SUN4I_I2S_FIFO_RX_REG 0x10
#define SUN4I_I2S_FIFO_CTRL_REG 0x14
@@ -72,8 +75,10 @@
#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
#define SUN4I_I2S_INT_STA_REG 0x20
+#define SUN8I_I2S_FIFO_TX_REG 0x20
#define SUN4I_I2S_CLK_DIV_REG 0x24
+#define SUN8I_I2S_CLK_DIV_MCLK_EN 8
#define SUN4I_I2S_CLK_DIV_MCLK_EN 7
#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
@@ -86,16 +91,29 @@
#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
+#define SUN8I_I2S_CHAN_CFG_REG 0x30
+
#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
+#define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
+#define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
#define SUN4I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1))
#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
+#define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
+
+#define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
+#define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
+

I would not interleave those defines. It's a bit hard to see which
generation has which set of registers. I guess you could just move the
new ones to the bottom of the defines.

Post by c***@gmail.com
struct sun4i_i2s_quirks {
bool has_reset;
bool has_master_slave_sel;
+ bool has_fmt_set_lrck_period;
+ bool has_chcfg;
+ bool has_chsel_tx_chen;
+ bool has_chsel_offset;
unsigned int reg_offset_txdata; /* TX FIFO */
unsigned int reg_offset_txchanmap;
unsigned int reg_offset_rxchanmap;
@@ -113,6 +131,11 @@ struct sun4i_i2s_quirks {
struct reg_field field_fmt_set_mode;
struct reg_field field_txchansel;
struct reg_field field_rxchansel;
+ struct reg_field field_fmt_set_lrck_period;
+ struct reg_field field_chcfg_tx_slot_num;
+ struct reg_field field_chcfg_rx_slot_num;
+ struct reg_field field_chsel_tx_chen;
+ struct reg_field field_chsel_offset;

If you have booleans already, I guess you don't really need the
regmap_fields. You won't make that setup in the !h3 case, so the
regmap_field mapping is going to be useless anyway.

Post by c***@gmail.com
};
struct sun4i_i2s {
@@ -136,6 +159,11 @@ struct sun4i_i2s {
struct regmap_field *field_fmt_set_mode;
struct regmap_field *field_txchansel;
struct regmap_field *field_rxchansel;
+ struct regmap_field *field_fmt_set_lrck_period;
+ struct regmap_field *field_chcfg_tx_slot_num;
+ struct regmap_field *field_chcfg_rx_slot_num;
+ struct regmap_field *field_chsel_tx_chen;
+ struct regmap_field *field_chsel_offset;
const struct sun4i_i2s_quirks *variant;
};
@@ -152,6 +180,14 @@ static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
{ .div = 8, .val = 3 },
{ .div = 12, .val = 4 },
{ .div = 16, .val = 5 },
+ { .div = 24, .val = 6 },
+ { .div = 32, .val = 7 },
+ { .div = 48, .val = 8 },
+ { .div = 64, .val = 9 },
+ { .div = 96, .val = 10 },
+ { .div = 128, .val = 11 },
+ { .div = 176, .val = 12 },
+ { .div = 192, .val = 13 },
};
static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
@@ -163,6 +199,13 @@ static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
{ .div = 12, .val = 5 },
{ .div = 16, .val = 6 },
{ .div = 24, .val = 7 },
+ { .div = 32, .val = 8 },
+ { .div = 48, .val = 9 },
+ { .div = 64, .val = 10 },
+ { .div = 96, .val = 11 },
+ { .div = 128, .val = 12 },
+ { .div = 176, .val = 13 },
+ { .div = 192, .val = 14 },
};

I'm not sure about this one. We might end up on !h3 with an invalid
divider.

Post by c***@gmail.com
static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
@@ -270,6 +313,10 @@ static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,
regmap_field_write(i2s->field_clkdiv_mclk_en, 1);
+ /* Set sync period */
+ if (i2s->variant->has_fmt_set_lrck_period)
+ regmap_field_write(i2s->field_fmt_set_lrck_period, 0x1f);
+
return 0;
}
@@ -284,6 +331,13 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
if (params_channels(params) != 2)
return -EINVAL;
+ if (i2s->variant->has_chcfg) {
+ regmap_field_write(i2s->field_chcfg_tx_slot_num,
+ params_channels(params) - 1);
+ regmap_field_write(i2s->field_chcfg_rx_slot_num,
+ params_channels(params) - 1);
+ }
+
/* Map the channels for playback */
regmap_write(i2s->regmap, i2s->variant->reg_offset_txchanmap,
0x76543210);
@@ -299,6 +353,9 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
regmap_field_write(i2s->field_rxchansel,
SUN4I_I2S_CHAN_SEL(params_channels(params)));
+ if (i2s->variant->has_chsel_tx_chen)
+ regmap_field_write(i2s->field_chsel_tx_chen,
+ SUN4I_I2S_TX_CHAN_EN(params_channels(params)));
switch (params_physical_width(params)) {
@@ -332,6 +389,7 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
u32 val;
+ u32 offset = 0;
u32 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
u32 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
@@ -339,6 +397,7 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
val = SUN4I_I2S_FMT0_FMT_I2S;
+ offset = 1;
break;
val = SUN4I_I2S_FMT0_FMT_LEFT_J;
@@ -350,6 +409,19 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
return -EINVAL;
}
+ if (i2s->variant->has_chsel_offset) {
+ /*
+ * offset being set indicates that we're connected to an i2s
+ * device, however offset is only used on the sun8i block and
+ * i2s shares the same setting with the LJ format. Increment
+ * val so that the bit to value to write is correct.
+ */
+ if (offset > 0)
+ val++;
+ /* blck offset determines whether i2s or LJ */
+ regmap_field_write(i2s->field_chsel_offset, offset);
+ }
+
regmap_field_write(i2s->field_fmt_set_mode, val);
/* DAI clock polarity */
@@ -393,6 +465,29 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
SUN4I_I2S_CTRL_MODE_MASK,
val);
+ } else {
+ /*
+ * The newer i2s block does not have a slave select bit,
+ * instead the clk pins are configured as inputs.
+ */
+ /* DAI clock master masks */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ /* BCLK and LRCLK master */
+ val = SUN8I_I2S_CTRL_BCLK_OUT |
+ SUN8I_I2S_CTRL_LRCK_OUT;
+ break;
+ /* BCLK and LRCLK slave */
+ val = 0;
+ break;
+ return -EINVAL;
+ }
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN8I_I2S_CTRL_BCLK_OUT |
+ SUN8I_I2S_CTRL_LRCK_OUT,
+ val);
}
/* Set significant bits in our FIFOs */
@@ -642,6 +737,15 @@ static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
}
}
+static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
+{
+
+ if (reg == SUN8I_I2S_INT_STA_REG)
+ return true;
+
+ return sun4i_i2s_volatile_reg(dev, reg);
+}

This means that SUN8I_I2S_FIFO_TX_REG will be treated as volatile.

Thanks!
maxime

--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Code Kipper

2017-07-25 17:52:15 UTC

Permalink

On 25 July 2017 at 16:36, Maxime Ripard

Post by Maxime Ripard
Hi,

I would not interleave those defines. It's a bit hard to see which
generation has which set of registers. I guess you could just move the
new ones to the bottom of the defines.

Ok...you especially see it when looking at the patch. I'll add a
comment and move everything to the bottom.

Post by Maxime Ripard

If you have booleans already, I guess you don't really need the
regmap_fields. You won't make that setup in the !h3 case, so the
regmap_field mapping is going to be useless anyway.

ack

Post by Maxime Ripard

I'm not sure about this one. We might end up on !h3 with an invalid
divider.

Yeah...this is a late addition to the change and I've not experimented
with the values. Maybe I can add this at a later stage.

Post by Maxime Ripard

This means that SUN8I_I2S_FIFO_TX_REG will be treated as volatile.

I'll look into this....
BR,
CK

Post by Maxime Ripard
Thanks!
maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com