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pcm format 4 channels: no need ac108_plugin

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This commit is contained in:
peter.yang 2017-11-10 09:00:23 +00:00
parent 3fd4021f45
commit 7f4b5849a7
5 changed files with 102 additions and 51 deletions
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43
ac108.c
View file

@ -48,6 +48,7 @@ struct ac108_priv {
struct i2c_client *i2c[4];
int codec_index;
int sysclk;
unsigned mclk; /* master clock or aif_clock/aclk */
int clk_id;
unsigned char i2s_mode;
unsigned char data_protocol;
@ -82,6 +83,13 @@ static const struct real_val_to_reg_val ac108_sample_resolution[] = {
{ 32, 7 },
};
static const unsigned ac108_bclkdivs[] = {
0, 1, 2, 4,
6, 8, 12, 16,
24, 32, 48, 64,
96, 128, 176, 192,
};
/* FOUT =(FIN * N) / [(M1+1) * (M2+1)*(K1+1)*(K2+1)] ; M1[0,31], M2[0,1], N[0,1023], K1[0,31], K2[0,1] */
static const struct pll_div ac108_pll_div_list[] = {
{ 400000, 24576000, 0, 0, 614, 4, 1 },
@ -700,6 +708,7 @@ static void ac108_configure_power(struct ac108_priv *ac108) {
static int ac108_configure_clocking(struct ac108_priv *ac108, unsigned int rate) {
unsigned int i = 0;
struct pll_div ac108_pll_div = { 0 };
if (ac108->clk_id == SYSCLK_SRC_PLL) {
/* FOUT =(FIN * N) / [(M1+1) * (M2+1)*(K1+1)*(K2+1)] */
for (i = 0; i < ARRAY_SIZE(ac108_pll_div_list); i++) {
@ -729,6 +738,7 @@ static int ac108_configure_clocking(struct ac108_priv *ac108, unsigned int rate)
*/
ac108_multi_chips_update_bits(SYSCLK_CTRL, 0x01 << PLLCLK_EN | 0x03 << PLLCLK_SRC | 0x01 << SYSCLK_SRC | 0x01 << SYSCLK_EN,
0x01 << PLLCLK_EN | 0x00 << PLLCLK_SRC | 0x01 << SYSCLK_SRC | 0x01 << SYSCLK_EN, ac108);
ac108->mclk = ac108_pll_div.freq_out;
}
if (ac108->clk_id == SYSCLK_SRC_MCLK) {
/**
@ -736,6 +746,7 @@ static int ac108_configure_clocking(struct ac108_priv *ac108, unsigned int rate)
*/
ac108_multi_chips_update_bits(SYSCLK_CTRL, 0x01 << PLLCLK_EN | 0x01 << SYSCLK_SRC | 0x01 << SYSCLK_EN,
0x00 << PLLCLK_EN | 0x00 << SYSCLK_SRC | 0x01 << SYSCLK_EN, ac108);
ac108->mclk = ac108->sysclk;
}
/*0x21: Module clock enable<I2S, ADC digital, MIC offset Calibration, ADC analog>*/
ac108_multi_chips_write(MOD_CLK_EN, 1 << I2S | 1 << ADC_DIGITAL | 1 << MIC_OFFSET_CALIBRATION | 1 << ADC_ANALOG, ac108);
@ -748,7 +759,8 @@ static int ac108_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_h
unsigned int i, channels, sample_resolution, rate;
struct snd_soc_codec *codec = dai->codec;
struct ac108_priv *ac108 = snd_soc_codec_get_drvdata(codec);
rate = 99;
unsigned bclkdiv;
dev_dbg(dai->dev, "%s\n", __FUNCTION__);
channels = params_channels(params);
@ -775,13 +787,16 @@ static int ac108_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_h
}
dev_dbg(dai->dev, "rate:%d \n", params_rate(params));
for (i = 0; i < ARRAY_SIZE(ac108_sample_rate); i++) {
if (ac108_sample_rate[i].real_val ==( params_rate(params)/2)) {
if (ac108_sample_rate[i].real_val == params_rate(params) / (ac108->data_protocol + 1UL)) {
rate = i;
break;
}
}
if (rate == 99) return -EINVAL;
if (i >= ARRAY_SIZE(ac108_sample_rate)) {
return -EINVAL;
}
dev_dbg(dai->dev, "rate: %d , channels: %d , sample_resolution: %d",
@ -817,12 +832,13 @@ static int ac108_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_h
/**
* TODO: need test.
*/
ac108_multi_chips_update_bits(I2S_LRCK_CTRL1, 0x03 << 0, 0x00, ac108);
}
} else {
/**
* TODO: need test.
*/
/*TDM mode or normal mode*/
ac108_multi_chips_write(I2S_LRCK_CTRL2, ac108_sample_resolution[sample_resolution].real_val * channels - 1, ac108);
ac108_multi_chips_update_bits(I2S_LRCK_CTRL1, 0x03 << 0, 0x00, ac108);
}
/**
@ -841,6 +857,18 @@ static int ac108_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_h
ac108_multi_chips_update_bits(ADC_SPRC, 0x0f << ADC_FS_I2S1, ac108_sample_rate[rate].reg_val << ADC_FS_I2S1, ac108);
ac108_multi_chips_write(HPF_EN,0x0f,ac108);
ac108_configure_clocking(ac108, ac108_sample_rate[rate].real_val);
/*
* master mode only
*/
bclkdiv = ac108->mclk / (ac108_sample_rate[rate].real_val * channels * ac108_sample_resolution[sample_resolution].real_val);
for (i = 0; i < ARRAY_SIZE(ac108_bclkdivs) - 1; i++) {
if (ac108_bclkdivs[i] >= bclkdiv) {
break;
}
}
ac108_multi_chips_update_bits(I2S_BCLK_CTRL, 0x0F << BCLKDIV, i << BCLKDIV, ac108);
return 0;
}
@ -888,7 +916,8 @@ static int ac108_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) {
/**
* 0x30:chip is master mode ,BCLK & LRCK output
*/
ac108_multi_chips_update_bits(I2S_CTRL, 0x03 << LRCK_IOEN, 0x03 << LRCK_IOEN, ac108);
ac108_multi_chips_update_bits(I2S_CTRL, 0x03 << LRCK_IOEN | 0x03 << SDO1_EN | 0x1 << TXEN | 0x1 << GEN,
0x03 << LRCK_IOEN | 0x03 << SDO1_EN | 0x1 << TXEN | 0x1 << GEN, ac108);
/* multi_chips: only one chip set as Master, and the others also need to set as Slave */
if (ac108->codec_index > 1) ac108_update_bits(I2S_CTRL, 0x3 << LRCK_IOEN, 0x0 << LRCK_IOEN, ac108->i2c[1]);

5
asound_4mic.conf
View file

@ -21,7 +21,8 @@ pcm.dmixed {
pcm.ac108 {
type ac108
slavepcm "hw:1,0"
type hw
card 1
device 0
channels 4
}

23
seeed-4mic-voicecard-overlay.dts
View file

@ -3,6 +3,7 @@
/ {
compatible = "brcm,bcm2708";
fragment@0 {
target = <&i2s>;
__overlay__ {
@ -10,6 +11,7 @@
status = "okay";
};
};
fragment@1 {
target-path = "/clocks";
__overlay__ {
@ -20,6 +22,7 @@
};
};
};
fragment@2 {
target = <&i2c1>;
__overlay__ {
@ -31,25 +34,30 @@
compatible = "x-power,ac108_0";
reg = <0x3b>;
#sound-dai-cells = <0>;
data-protocol = <1>;
data-protocol = <0>;
};
};
};
fragment@3 {
target = <&sound>;
sound_overlay: __overlay__ {
compatible = "simple-audio-card";
simple-audio-card,format = "i2s";
simple-audio-card,format = "dsp_a";
simple-audio-card,name = "seeed-4mic-voicecard";
status = "okay";
simple-audio-card,bitclock-master = <&dailink0_slave>;
simple-audio-card,frame-slave = <&dailink0_slave>;
dailink0_slave: simple-audio-card,cpu {
simple-audio-card,bitclock-master = <&codec_dai>;
simple-audio-card,frame-master = <&codec_dai>;
cpu_dai: simple-audio-card,cpu {
sound-dai = <&i2s>;
dai-tdm-slot-num = <2>;
dai-tdm-slot-width = <32>;
dai-tdm-slot-tx-mask = <1 1 0 0>;
dai-tdm-slot-rx-mask = <1 1 0 0>;
};
codec_dai: simple-audio-card,codec {
sound-dai = <&ac108_a>;
@ -57,10 +65,9 @@
};
};
};
__overrides__ {
card-name = <&sound_overlay>,"seeed-voicecard,name";
};
};

BIN
seeed-4mic-voicecard.dtbo
View file

Binary file not shown.

14
simple-card.c
View file

@ -125,6 +125,11 @@ static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
if (ret)
clk_disable_unprepare(dai_props->cpu_dai.clk);
rtd->cpu_dai->driver->playback.channels_min = 4;
rtd->cpu_dai->driver->playback.channels_max = 4;
rtd->cpu_dai->driver->capture.channels_min = 4;
rtd->cpu_dai->driver->capture.channels_max = 4;
return ret;
}
@ -135,6 +140,11 @@ static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
struct simple_dai_props *dai_props =
simple_priv_to_props(priv, rtd->num);
rtd->cpu_dai->driver->playback.channels_min = 2;
rtd->cpu_dai->driver->playback.channels_max = 2;
rtd->cpu_dai->driver->capture.channels_min = 2;
rtd->cpu_dai->driver->capture.channels_max = 2;
clk_disable_unprepare(dai_props->cpu_dai.clk);
clk_disable_unprepare(dai_props->codec_dai.clk);
@ -268,6 +278,10 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
&cpu_dai->rx_slot_mask,
&cpu_dai->slots,
&cpu_dai->slot_width);
dev_dbg(dev, "cpu_dai : slot,width,tx,rx = %d,%d,%d,%d\n",
cpu_dai->slots, cpu_dai->slot_width,
cpu_dai->tx_slot_mask, cpu_dai->rx_slot_mask
);
if (ret < 0)
goto dai_link_of_err;