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[2/2] ASoC: tlv320aic31xx: Choose PLL p divider automatically

Message ID 7615158ab393c4dff1b7d2447e72b5b0ee3ab1cc.1409747234.git.jsarha@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Jyri Sarha Sept. 3, 2014, 12:52 p.m. UTC 
This simplifies aic31xx_divs table. There is no more need for p_val or
separate lines for 12 and 24 MHz mclks.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
---
 sound/soc/codecs/tlv320aic31xx.c |  101 +++++++++++++++++++-------------------
 1 file changed, 50 insertions(+), 51 deletions(-)
diff mbox

Patch

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index aea9e1f..733da78 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -167,13 +167,13 @@  struct aic31xx_priv {
 	struct regulator_bulk_data supplies[AIC31XX_NUM_SUPPLIES];
 	struct aic31xx_disable_nb disable_nb[AIC31XX_NUM_SUPPLIES];
 	unsigned int sysclk;
+	u8 p_div;
 	int rate_div_line;
 };
 
 struct aic31xx_rate_divs {
-	u32 mclk;
+	u32 mclk_p;
 	u32 rate;
-	u8 p_val;
 	u8 pll_j;
 	u16 pll_d;
 	u16 dosr;
@@ -186,62 +186,51 @@  struct aic31xx_rate_divs {
 
 /* ADC dividers can be disabled by cofiguring them to 0 */
 static const struct aic31xx_rate_divs aic31xx_divs[] = {
-	/* mclk      rate  pll: p  j	 d     dosr ndac mdac  aors nadc madc */
+	/* mclk/p    rate  pll: j     d        dosr ndac mdac  aors nadc madc */
 	/* 8k rate */
-	{12000000,   8000,	1, 8, 1920,	128,  48,  2,	128,  48,  2},
-	{12000000,   8000,	1, 8, 1920,	128,  32,  3,	128,  32,  3},
-	{24000000,   8000,	2, 8, 1920,	128,  48,  2,	128,  48,  2},
-	{25000000,   8000,	2, 7, 8643,	128,  48,  2,	128,  48,  2},
+	{12000000,   8000,	8, 1920,	128,  48,  2,	128,  48,  2},
+	{12000000,   8000,	8, 1920,	128,  32,  3,	128,  32,  3},
+	{12500000,   8000,	7, 8643,	128,  48,  2,	128,  48,  2},
 	/* 11.025k rate */
-	{12000000,  11025,	1, 7, 5264,	128,  32,  2,	128,  32,  2},
-	{12000000,  11025,	1, 8, 4672,	128,  24,  3,	128,  24,  3},
-	{24000000,  11025,	2, 7, 5264,	128,  32,  2,	128,  32,  2},
-	{25000000,  11025,	2, 7, 2253,	128,  32,  2,	128,  32,  2},
+	{12000000,  11025,	7, 5264,	128,  32,  2,	128,  32,  2},
+	{12000000,  11025,	8, 4672,	128,  24,  3,	128,  24,  3},
+	{12500000,  11025,	7, 2253,	128,  32,  2,	128,  32,  2},
 	/* 16k rate */
-	{12000000,  16000,	1, 8, 1920,	128,  24,  2,	128,  24,  2},
-	{12000000,  16000,	1, 8, 1920,	128,  16,  3,	128,  16,  3},
-	{24000000,  16000,	2, 8, 1920,	128,  24,  2,	128,  24,  2},
-	{25000000,  16000,	2, 7, 8643,	128,  24,  2,	128,  24,  2},
+	{12000000,  16000,	8, 1920,	128,  24,  2,	128,  24,  2},
+	{12000000,  16000,	8, 1920,	128,  16,  3,	128,  16,  3},
+	{12500000,  16000,	7, 8643,	128,  24,  2,	128,  24,  2},
 	/* 22.05k rate */
-	{12000000,  22050,	1, 7, 5264,	128,  16,  2,	128,  16,  2},
-	{12000000,  22050,	1, 8, 4672,	128,  12,  3,	128,  12,  3},
-	{24000000,  22050,	2, 7, 5264,	128,  16,  2,	128,  16,  2},
-	{25000000,  22050,	2, 7, 2253,	128,  16,  2,	128,  16,  2},
+	{12000000,  22050,	7, 5264,	128,  16,  2,	128,  16,  2},
+	{12000000,  22050,	8, 4672,	128,  12,  3,	128,  12,  3},
+	{12500000,  22050,	7, 2253,	128,  16,  2,	128,  16,  2},
 	/* 32k rate */
-	{12000000,  32000,	1, 8, 1920,	128,  12,  2,	128,  12,  2},
-	{12000000,  32000,	1, 8, 1920,	128,   8,  3,	128,   8,  3},
-	{24000000,  32000,	2, 8, 1920,	128,  12,  2,	128,  12,  2},
-	{25000000,  32000,	2, 7, 8643,	128,  12,  2,	128,  12,  2},
+	{12000000,  32000,	8, 1920,	128,  12,  2,	128,  12,  2},
+	{12000000,  32000,	8, 1920,	128,   8,  3,	128,   8,  3},
+	{12500000,  32000,	7, 8643,	128,  12,  2,	128,  12,  2},
 	/* 44.1k rate */
-	{12000000,  44100,	1, 7, 5264,	128,   8,  2,	128,   8,  2},
-	{12000000,  44100,	1, 8, 4672,	128,   6,  3,	128,   6,  3},
-	{24000000,  44100,	2, 7, 5264,	128,   8,  2,	128,   8,  2},
-	{25000000,  44100,	2, 7, 2253,	128,   8,  2,	128,   8,  2},
+	{12000000,  44100,	7, 5264,	128,   8,  2,	128,   8,  2},
+	{12000000,  44100,	8, 4672,	128,   6,  3,	128,   6,  3},
+	{12500000,  44100,	7, 2253,	128,   8,  2,	128,   8,  2},
 	/* 48k rate */
-	{12000000,  48000,	1, 8, 1920,	128,   8,  2,	128,   8,  2},
-	{12000000,  48000,	1, 7, 6800,	 96,   5,  4,	 96,   5,  4},
-	{24000000,  48000,	2, 8, 1920,	128,   8,  2,	128,   8,  2},
-	{25000000,  48000,	2, 7, 8643,	128,   8,  2,	128,   8,  2},
+	{12000000,  48000,	8, 1920,	128,   8,  2,	128,   8,  2},
+	{12000000,  48000,	7, 6800,	 96,   5,  4,	 96,   5,  4},
+	{12500000,  48000,	7, 8643,	128,   8,  2,	128,   8,  2},
 	/* 88.2k rate */
-	{12000000,  88200,	1, 7, 5264,	 64,   8,  2,	 64,   8,  2},
-	{12000000,  88200,	1, 8, 4672,	 64,   6,  3,	 64,   6,  3},
-	{24000000,  88200,	2, 7, 5264,	 64,   8,  2,	 64,   8,  2},
-	{25000000,  88200,	2, 7, 2253,	 64,   8,  2,	 64,   8,  2},
+	{12000000,  88200,	7, 5264,	 64,   8,  2,	 64,   8,  2},
+	{12000000,  88200,	8, 4672,	 64,   6,  3,	 64,   6,  3},
+	{12500000,  88200,	7, 2253,	 64,   8,  2,	 64,   8,  2},
 	/* 96k rate */
-	{12000000,  96000,	1, 8, 1920,	 64,   8,  2,	 64,   8,  2},
-	{12000000,  96000,	1, 7, 6800,	 48,   5,  4,	 48,   5,  4},
-	{24000000,  96000,	2, 8, 1920,	 64,   8,  2,	 64,   8,  2},
-	{25000000,  96000,	2, 7, 8643,	 64,   8,  2,	 64,   8,  2},
+	{12000000,  96000,	8, 1920,	 64,   8,  2,	 64,   8,  2},
+	{12000000,  96000,	7, 6800,	 48,   5,  4,	 48,   5,  4},
+	{12500000,  96000,	7, 8643,	 64,   8,  2,	 64,   8,  2},
 	/* 176.4k rate */
-	{12000000, 176400,	1, 7, 5264,	 32,   8,  2,	 32,   8,  2},
-	{12000000, 176400,	1, 8, 4672,	 32,   6,  3,	 32,   6,  3},
-	{24000000, 176400,	2, 7, 5264,	 32,   8,  2,	 32,   8,  2},
-	{25000000, 176400,	2, 7, 2253,	 32,   8,  2,	 32,   8,  2},
+	{12000000, 176400,	7, 5264,	 32,   8,  2,	 32,   8,  2},
+	{12000000, 176400,	8, 4672,	 32,   6,  3,	 32,   6,  3},
+	{12500000, 176400,	7, 2253,	 32,   8,  2,	 32,   8,  2},
 	/* 192k rate */
-	{12000000, 192000,	1, 8, 1920,	 32,   8,  2,	 32,   8,  2},
-	{12000000, 192000,	1, 7, 6800,	 24,   5,  4,	 24,   5,  4},
-	{24000000, 192000,	2, 8, 1920,	 32,   8,  2,	 32,   8,  2},
-	{25000000, 192000,	2, 7, 8643,	 32,   8,  2,	 32,   8,  2},
+	{12000000, 192000,	8, 1920,	 32,   8,  2,	 32,   8,  2},
+	{12000000, 192000,	7, 6800,	 24,   5,  4,	 24,   5,  4},
+	{12500000, 192000,	7, 8643,	 32,   8,  2,	 32,   8,  2},
 };
 
 static const char * const ldac_in_text[] = {
@@ -692,6 +681,7 @@  static int aic31xx_setup_pll(struct snd_soc_codec *codec,
 {
 	struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
 	int bclk_score = snd_soc_params_to_frame_size(params);
+	int mclk_p = aic31xx->sysclk / aic31xx->p_div;
 	int bclk_n = 0;
 	int match = -1;
 	int i;
@@ -704,7 +694,7 @@  static int aic31xx_setup_pll(struct snd_soc_codec *codec,
 
 	for (i = 0; i < ARRAY_SIZE(aic31xx_divs); i++) {
 		if (aic31xx_divs[i].rate == params_rate(params) &&
-		    aic31xx_divs[i].mclk == aic31xx->sysclk) {
+		    aic31xx_divs[i].mclk_p == mclk_p) {
 			int s =	(aic31xx_divs[i].dosr * aic31xx_divs[i].mdac) %
 				snd_soc_params_to_frame_size(params);
 			int bn = (aic31xx_divs[i].dosr * aic31xx_divs[i].mdac) /
@@ -738,7 +728,7 @@  static int aic31xx_setup_pll(struct snd_soc_codec *codec,
 
 	/* PLL configuration */
 	snd_soc_update_bits(codec, AIC31XX_PLLPR, AIC31XX_PLL_MASK,
-			    (aic31xx_divs[i].p_val << 4) | 0x01);
+			    (aic31xx->p_div << 4) | 0x01);
 	snd_soc_write(codec, AIC31XX_PLLJ, aic31xx_divs[i].pll_j);
 
 	snd_soc_write(codec, AIC31XX_PLLDMSB,
@@ -772,7 +762,7 @@  static int aic31xx_setup_pll(struct snd_soc_codec *codec,
 	dev_dbg(codec->dev,
 		"pll %d.%04d/%d dosr %d n %d m %d aosr %d n %d m %d bclk_n %d\n",
 		aic31xx_divs[i].pll_j, aic31xx_divs[i].pll_d,
-		aic31xx_divs[i].p_val, aic31xx_divs[i].dosr,
+		aic31xx->p_div, aic31xx_divs[i].dosr,
 		aic31xx_divs[i].ndac, aic31xx_divs[i].mdac,
 		aic31xx_divs[i].aosr, aic31xx_divs[i].nadc,
 		aic31xx_divs[i].madc, bclk_n);
@@ -912,7 +902,16 @@  static int aic31xx_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 	dev_dbg(codec->dev, "## %s: clk_id = %d, freq = %d, dir = %d\n",
 		__func__, clk_id, freq, dir);
 
-	for (i = 0; aic31xx_divs[i].mclk != freq; i++) {
+	for (i = 1; freq/i > 20000000 && i < 8; i++)
+		;
+	if (freq/i > 20000000) {
+		dev_err(aic31xx->dev, "%s: Too high mclk frequency %u\n",
+			__func__, freq);
+			return -EINVAL;
+	}
+	aic31xx->p_div = i;
+
+	for (i = 0; aic31xx_divs[i].mclk_p != freq/aic31xx->p_div; i++) {
 		if (i == ARRAY_SIZE(aic31xx_divs)) {
 			dev_err(aic31xx->dev, "%s: Unsupported frequency %d\n",
 				__func__, freq);