#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
+#include <linux/gcd.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
+#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include "pcm512x.h"
+#define DIV_ROUND_DOWN_ULL(ll, d) \
+ ({ unsigned long long _tmp = (ll); do_div(_tmp, d); _tmp; })
+#define DIV_ROUND_CLOSEST_ULL(ll, d) \
+ ({ unsigned long long _tmp = (ll)+(d)/2; do_div(_tmp, d); _tmp; })
+
#define PCM512x_NUM_SUPPLIES 3
static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = {
"AVDD",
struct clk *sclk;
struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES];
struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES];
+ int fmt;
+ int pll_in;
+ int pll_out;
+ int pll_r;
+ int pll_j;
+ int pll_d;
+ int pll_p;
+ unsigned long real_pll;
};
/*
{ PCM512x_MUTE, 0x00 },
{ PCM512x_DSP, 0x00 },
{ PCM512x_PLL_REF, 0x00 },
+ { PCM512x_DAC_REF, 0x00 },
{ PCM512x_DAC_ROUTING, 0x11 },
{ PCM512x_DSP_PROGRAM, 0x01 },
{ PCM512x_CLKDET, 0x00 },
{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
{ PCM512x_VCOM_CTRL_1, 0x00 },
{ PCM512x_VCOM_CTRL_2, 0x01 },
+ { PCM512x_BCLK_LRCLK_CFG, 0x00 },
+ { PCM512x_MASTER_MODE, 0x7c },
+ { PCM512x_GPIO_DACIN, 0x00 },
+ { PCM512x_GPIO_PLLIN, 0x00 },
+ { PCM512x_SYNCHRONIZE, 0x10 },
+ { PCM512x_PLL_COEFF_0, 0x00 },
+ { PCM512x_PLL_COEFF_1, 0x00 },
+ { PCM512x_PLL_COEFF_2, 0x00 },
+ { PCM512x_PLL_COEFF_3, 0x00 },
+ { PCM512x_PLL_COEFF_4, 0x00 },
+ { PCM512x_DSP_CLKDIV, 0x00 },
+ { PCM512x_DAC_CLKDIV, 0x00 },
+ { PCM512x_NCP_CLKDIV, 0x00 },
+ { PCM512x_OSR_CLKDIV, 0x00 },
+ { PCM512x_MASTER_CLKDIV_1, 0x00 },
+ { PCM512x_MASTER_CLKDIV_2, 0x00 },
+ { PCM512x_FS_SPEED_MODE, 0x00 },
+ { PCM512x_IDAC_1, 0x01 },
+ { PCM512x_IDAC_2, 0x00 },
};
static bool pcm512x_readable(struct device *dev, unsigned int reg)
case PCM512x_DSP_GPIO_INPUT:
case PCM512x_MASTER_MODE:
case PCM512x_PLL_REF:
+ case PCM512x_DAC_REF:
+ case PCM512x_GPIO_DACIN:
+ case PCM512x_GPIO_PLLIN:
+ case PCM512x_SYNCHRONIZE:
case PCM512x_PLL_COEFF_0:
case PCM512x_PLL_COEFF_1:
case PCM512x_PLL_COEFF_2:
case PCM512x_RATE_DET_2:
case PCM512x_RATE_DET_3:
case PCM512x_RATE_DET_4:
+ case PCM512x_CLOCK_STATUS:
case PCM512x_ANALOG_MUTE_DET:
case PCM512x_GPIN:
case PCM512x_DIGITAL_MUTE_DET:
case PCM512x_VCOM_CTRL_1:
case PCM512x_VCOM_CTRL_2:
case PCM512x_CRAM_CTRL:
+ case PCM512x_FLEX_A:
+ case PCM512x_FLEX_B:
return true;
default:
/* There are 256 raw register addresses */
case PCM512x_RATE_DET_2:
case PCM512x_RATE_DET_3:
case PCM512x_RATE_DET_4:
+ case PCM512x_CLOCK_STATUS:
case PCM512x_ANALOG_MUTE_DET:
case PCM512x_GPIN:
case PCM512x_DIGITAL_MUTE_DET:
SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3,
PCM512x_ACTL_SHIFT, 1, 0),
SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT,
- PCM512x_AMLR_SHIFT, 1, 0),
+ PCM512x_AMRE_SHIFT, 1, 0),
SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf),
SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds),
{ "OUTR", NULL, "DACR" },
};
+static const u32 pcm512x_dai_rates[] = {
+ 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
+ 88200, 96000, 176400, 192000, 384000,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_slave = {
+ .count = ARRAY_SIZE(pcm512x_dai_rates),
+ .list = pcm512x_dai_rates,
+};
+
+static int pcm512x_hw_rule_rate(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_interval ranges[2];
+ int frame_size;
+
+ frame_size = snd_soc_params_to_frame_size(params);
+ if (frame_size < 0)
+ return frame_size;
+
+ switch (frame_size) {
+ case 32:
+ /* No hole when the frame size is 32. */
+ return 0;
+ case 48:
+ case 64:
+ /* There is only one hole in the range of supported
+ * rates, but it moves with the frame size.
+ */
+ memset(ranges, 0, sizeof(ranges));
+ ranges[0].min = 8000;
+ ranges[0].max = 25000000 / frame_size / 2;
+ ranges[1].min = DIV_ROUND_UP(16000000, frame_size);
+ ranges[1].max = 384000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return snd_interval_ranges(hw_param_interval(params, rule->var),
+ ARRAY_SIZE(ranges), ranges, 0);
+}
+
+static int pcm512x_dai_startup_master(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+ struct device *dev = dai->dev;
+ struct snd_pcm_hw_constraint_ratnums *constraints_no_pll;
+ struct snd_ratnum *rats_no_pll;
+
+ if (IS_ERR(pcm512x->sclk)) {
+ dev_err(dev, "Need SCLK for master mode: %ld\n",
+ PTR_ERR(pcm512x->sclk));
+ return PTR_ERR(pcm512x->sclk);
+ }
+
+ if (pcm512x->pll_out)
+ return snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ pcm512x_hw_rule_rate,
+ NULL,
+ SNDRV_PCM_HW_PARAM_FRAME_BITS,
+ SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+
+ constraints_no_pll = devm_kzalloc(dev, sizeof(*constraints_no_pll),
+ GFP_KERNEL);
+ if (!constraints_no_pll)
+ return -ENOMEM;
+ constraints_no_pll->nrats = 1;
+ rats_no_pll = devm_kzalloc(dev, sizeof(*rats_no_pll), GFP_KERNEL);
+ if (!rats_no_pll)
+ return -ENOMEM;
+ constraints_no_pll->rats = rats_no_pll;
+ rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64;
+ rats_no_pll->den_min = 1;
+ rats_no_pll->den_max = 128;
+ rats_no_pll->den_step = 1;
+
+ return snd_pcm_hw_constraint_ratnums(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ constraints_no_pll);
+}
+
+static int pcm512x_dai_startup_slave(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+ struct device *dev = dai->dev;
+ struct regmap *regmap = pcm512x->regmap;
+
+ if (IS_ERR(pcm512x->sclk)) {
+ dev_info(dev, "No SCLK, using BCLK: %ld\n",
+ PTR_ERR(pcm512x->sclk));
+
+ /* Disable reporting of missing SCLK as an error */
+ regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
+ PCM512x_IDCH, PCM512x_IDCH);
+
+ /* Switch PLL input to BCLK */
+ regmap_update_bits(regmap, PCM512x_PLL_REF,
+ PCM512x_SREF, PCM512x_SREF_BCK);
+ }
+
+ return snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_slave);
+}
+
+static int pcm512x_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ case SND_SOC_DAIFMT_CBM_CFS:
+ return pcm512x_dai_startup_master(substream, dai);
+
+ case SND_SOC_DAIFMT_CBS_CFS:
+ return pcm512x_dai_startup_slave(substream, dai);
+
+ default:
+ return -EINVAL;
+ }
+}
+
static int pcm512x_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
return 0;
}
+static unsigned long pcm512x_find_sck(struct snd_soc_dai *dai,
+ unsigned long bclk_rate)
+{
+ struct device *dev = dai->dev;
+ unsigned long sck_rate;
+ int pow2;
+
+ /* 64 MHz <= pll_rate <= 100 MHz, VREF mode */
+ /* 16 MHz <= sck_rate <= 25 MHz, VREF mode */
+
+ /* select sck_rate as a multiple of bclk_rate but still with
+ * as many factors of 2 as possible, as that makes it easier
+ * to find a fast DAC rate
+ */
+ pow2 = 1 << fls((25000000 - 16000000) / bclk_rate);
+ for (; pow2; pow2 >>= 1) {
+ sck_rate = rounddown(25000000, bclk_rate * pow2);
+ if (sck_rate >= 16000000)
+ break;
+ }
+ if (!pow2) {
+ dev_err(dev, "Impossible to generate a suitable SCK\n");
+ return 0;
+ }
+
+ dev_dbg(dev, "sck_rate %lu\n", sck_rate);
+ return sck_rate;
+}
+
+/* pll_rate = pllin_rate * R * J.D / P
+ * 1 <= R <= 16
+ * 1 <= J <= 63
+ * 0 <= D <= 9999
+ * 1 <= P <= 15
+ * 64 MHz <= pll_rate <= 100 MHz
+ * if D == 0
+ * 1 MHz <= pllin_rate / P <= 20 MHz
+ * else if D > 0
+ * 6.667 MHz <= pllin_rate / P <= 20 MHz
+ * 4 <= J <= 11
+ * R = 1
+ */
+static int pcm512x_find_pll_coeff(struct snd_soc_dai *dai,
+ unsigned long pllin_rate,
+ unsigned long pll_rate)
+{
+ struct device *dev = dai->dev;
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+ unsigned long common;
+ int R, J, D, P;
+ unsigned long K; /* 10000 * J.D */
+ unsigned long num;
+ unsigned long den;
+
+ common = gcd(pll_rate, pllin_rate);
+ dev_dbg(dev, "pll %lu pllin %lu common %lu\n",
+ pll_rate, pllin_rate, common);
+ num = pll_rate / common;
+ den = pllin_rate / common;
+
+ /* pllin_rate / P (or here, den) cannot be greater than 20 MHz */
+ if (pllin_rate / den > 20000000 && num < 8) {
+ num *= 20000000 / (pllin_rate / den);
+ den *= 20000000 / (pllin_rate / den);
+ }
+ dev_dbg(dev, "num / den = %lu / %lu\n", num, den);
+
+ P = den;
+ if (den <= 15 && num <= 16 * 63
+ && 1000000 <= pllin_rate / P && pllin_rate / P <= 20000000) {
+ /* Try the case with D = 0 */
+ D = 0;
+ /* factor 'num' into J and R, such that R <= 16 and J <= 63 */
+ for (R = 16; R; R--) {
+ if (num % R)
+ continue;
+ J = num / R;
+ if (J == 0 || J > 63)
+ continue;
+
+ dev_dbg(dev, "R * J / P = %d * %d / %d\n", R, J, P);
+ pcm512x->real_pll = pll_rate;
+ goto done;
+ }
+ /* no luck */
+ }
+
+ R = 1;
+
+ if (num > 0xffffffffUL / 10000)
+ goto fallback;
+
+ /* Try to find an exact pll_rate using the D > 0 case */
+ common = gcd(10000 * num, den);
+ num = 10000 * num / common;
+ den /= common;
+ dev_dbg(dev, "num %lu den %lu common %lu\n", num, den, common);
+
+ for (P = den; P <= 15; P++) {
+ if (pllin_rate / P < 6667000 || 200000000 < pllin_rate / P)
+ continue;
+ if (num * P % den)
+ continue;
+ K = num * P / den;
+ /* J == 12 is ok if D == 0 */
+ if (K < 40000 || K > 120000)
+ continue;
+
+ J = K / 10000;
+ D = K % 10000;
+ dev_dbg(dev, "J.D / P = %d.%04d / %d\n", J, D, P);
+ pcm512x->real_pll = pll_rate;
+ goto done;
+ }
+
+ /* Fall back to an approximate pll_rate */
+
+fallback:
+ /* find smallest possible P */
+ P = DIV_ROUND_UP(pllin_rate, 20000000);
+ if (!P)
+ P = 1;
+ else if (P > 15) {
+ dev_err(dev, "Need a slower clock as pll-input\n");
+ return -EINVAL;
+ }
+ if (pllin_rate / P < 6667000) {
+ dev_err(dev, "Need a faster clock as pll-input\n");
+ return -EINVAL;
+ }
+ K = DIV_ROUND_CLOSEST_ULL(10000ULL * pll_rate * P, pllin_rate);
+ if (K < 40000)
+ K = 40000;
+ /* J == 12 is ok if D == 0 */
+ if (K > 120000)
+ K = 120000;
+ J = K / 10000;
+ D = K % 10000;
+ dev_dbg(dev, "J.D / P ~ %d.%04d / %d\n", J, D, P);
+ pcm512x->real_pll = DIV_ROUND_DOWN_ULL((u64)K * pllin_rate, 10000 * P);
+
+done:
+ pcm512x->pll_r = R;
+ pcm512x->pll_j = J;
+ pcm512x->pll_d = D;
+ pcm512x->pll_p = P;
+ return 0;
+}
+
+static unsigned long pcm512x_pllin_dac_rate(struct snd_soc_dai *dai,
+ unsigned long osr_rate,
+ unsigned long pllin_rate)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+ unsigned long dac_rate;
+
+ if (!pcm512x->pll_out)
+ return 0; /* no PLL to bypass, force SCK as DAC input */
+
+ if (pllin_rate % osr_rate)
+ return 0; /* futile, quit early */
+
+ /* run DAC no faster than 6144000 Hz */
+ for (dac_rate = rounddown(6144000, osr_rate);
+ dac_rate;
+ dac_rate -= osr_rate) {
+
+ if (pllin_rate / dac_rate > 128)
+ return 0; /* DAC divider would be too big */
+
+ if (!(pllin_rate % dac_rate))
+ return dac_rate;
+
+ dac_rate -= osr_rate;
+ }
+
+ return 0;
+}
+
+static int pcm512x_set_dividers(struct snd_soc_dai *dai,
+ struct snd_pcm_hw_params *params)
+{
+ struct device *dev = dai->dev;
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+ unsigned long pllin_rate = 0;
+ unsigned long pll_rate;
+ unsigned long sck_rate;
+ unsigned long mck_rate;
+ unsigned long bclk_rate;
+ unsigned long sample_rate;
+ unsigned long osr_rate;
+ unsigned long dacsrc_rate;
+ int bclk_div;
+ int lrclk_div;
+ int dsp_div;
+ int dac_div;
+ unsigned long dac_rate;
+ int ncp_div;
+ int osr_div;
+ int ret;
+ int idac;
+ int fssp;
+ int gpio;
+
+ lrclk_div = snd_soc_params_to_frame_size(params);
+ if (lrclk_div == 0) {
+ dev_err(dev, "No LRCLK?\n");
+ return -EINVAL;
+ }
+
+ if (!pcm512x->pll_out) {
+ sck_rate = clk_get_rate(pcm512x->sclk);
+ bclk_div = params->rate_den * 64 / lrclk_div;
+ bclk_rate = DIV_ROUND_CLOSEST(sck_rate, bclk_div);
+
+ mck_rate = sck_rate;
+ } else {
+ ret = snd_soc_params_to_bclk(params);
+ if (ret < 0) {
+ dev_err(dev, "Failed to find suitable BCLK: %d\n", ret);
+ return ret;
+ }
+ if (ret == 0) {
+ dev_err(dev, "No BCLK?\n");
+ return -EINVAL;
+ }
+ bclk_rate = ret;
+
+ pllin_rate = clk_get_rate(pcm512x->sclk);
+
+ sck_rate = pcm512x_find_sck(dai, bclk_rate);
+ if (!sck_rate)
+ return -EINVAL;
+ pll_rate = 4 * sck_rate;
+
+ ret = pcm512x_find_pll_coeff(dai, pllin_rate, pll_rate);
+ if (ret != 0)
+ return ret;
+
+ ret = regmap_write(pcm512x->regmap,
+ PCM512x_PLL_COEFF_0, pcm512x->pll_p - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write PLL P: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap,
+ PCM512x_PLL_COEFF_1, pcm512x->pll_j);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write PLL J: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap,
+ PCM512x_PLL_COEFF_2, pcm512x->pll_d >> 8);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write PLL D msb: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap,
+ PCM512x_PLL_COEFF_3, pcm512x->pll_d & 0xff);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write PLL D lsb: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap,
+ PCM512x_PLL_COEFF_4, pcm512x->pll_r - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write PLL R: %d\n", ret);
+ return ret;
+ }
+
+ mck_rate = pcm512x->real_pll;
+
+ bclk_div = DIV_ROUND_CLOSEST(sck_rate, bclk_rate);
+ }
+
+ if (bclk_div > 128) {
+ dev_err(dev, "Failed to find BCLK divider\n");
+ return -EINVAL;
+ }
+
+ /* the actual rate */
+ sample_rate = sck_rate / bclk_div / lrclk_div;
+ osr_rate = 16 * sample_rate;
+
+ /* run DSP no faster than 50 MHz */
+ dsp_div = mck_rate > 50000000 ? 2 : 1;
+
+ dac_rate = pcm512x_pllin_dac_rate(dai, osr_rate, pllin_rate);
+ if (dac_rate) {
+ /* the desired clock rate is "compatible" with the pll input
+ * clock, so use that clock as dac input instead of the pll
+ * output clock since the pll will introduce jitter and thus
+ * noise.
+ */
+ dev_dbg(dev, "using pll input as dac input\n");
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF,
+ PCM512x_SDAC, PCM512x_SDAC_GPIO);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to set gpio as dacref: %d\n", ret);
+ return ret;
+ }
+
+ gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1;
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_DACIN,
+ PCM512x_GREF, gpio);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to set gpio %d as dacin: %d\n",
+ pcm512x->pll_in, ret);
+ return ret;
+ }
+
+ dacsrc_rate = pllin_rate;
+ } else {
+ /* run DAC no faster than 6144000 Hz */
+ unsigned long dac_mul = 6144000 / osr_rate;
+ unsigned long sck_mul = sck_rate / osr_rate;
+
+ for (; dac_mul; dac_mul--) {
+ if (!(sck_mul % dac_mul))
+ break;
+ }
+ if (!dac_mul) {
+ dev_err(dev, "Failed to find DAC rate\n");
+ return -EINVAL;
+ }
+
+ dac_rate = dac_mul * osr_rate;
+ dev_dbg(dev, "dac_rate %lu sample_rate %lu\n",
+ dac_rate, sample_rate);
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF,
+ PCM512x_SDAC, PCM512x_SDAC_SCK);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to set sck as dacref: %d\n", ret);
+ return ret;
+ }
+
+ dacsrc_rate = sck_rate;
+ }
+
+ dac_div = DIV_ROUND_CLOSEST(dacsrc_rate, dac_rate);
+ if (dac_div > 128) {
+ dev_err(dev, "Failed to find DAC divider\n");
+ return -EINVAL;
+ }
+
+ ncp_div = DIV_ROUND_CLOSEST(dacsrc_rate / dac_div, 1536000);
+ if (ncp_div > 128 || dacsrc_rate / dac_div / ncp_div > 2048000) {
+ /* run NCP no faster than 2048000 Hz, but why? */
+ ncp_div = DIV_ROUND_UP(dacsrc_rate / dac_div, 2048000);
+ if (ncp_div > 128) {
+ dev_err(dev, "Failed to find NCP divider\n");
+ return -EINVAL;
+ }
+ }
+
+ osr_div = DIV_ROUND_CLOSEST(dac_rate, osr_rate);
+ if (osr_div > 128) {
+ dev_err(dev, "Failed to find OSR divider\n");
+ return -EINVAL;
+ }
+
+ idac = mck_rate / (dsp_div * sample_rate);
+
+ ret = regmap_write(pcm512x->regmap, PCM512x_DSP_CLKDIV, dsp_div - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write DSP divider: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap, PCM512x_DAC_CLKDIV, dac_div - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write DAC divider: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap, PCM512x_NCP_CLKDIV, ncp_div - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write NCP divider: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap, PCM512x_OSR_CLKDIV, osr_div - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write OSR divider: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap,
+ PCM512x_MASTER_CLKDIV_1, bclk_div - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write BCLK divider: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap,
+ PCM512x_MASTER_CLKDIV_2, lrclk_div - 1);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write LRCLK divider: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_1, idac >> 8);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write IDAC msb divider: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_2, idac & 0xff);
+ if (ret != 0) {
+ dev_err(dev, "Failed to write IDAC lsb divider: %d\n", ret);
+ return ret;
+ }
+
+ if (sample_rate <= 48000)
+ fssp = PCM512x_FSSP_48KHZ;
+ else if (sample_rate <= 96000)
+ fssp = PCM512x_FSSP_96KHZ;
+ else if (sample_rate <= 192000)
+ fssp = PCM512x_FSSP_192KHZ;
+ else
+ fssp = PCM512x_FSSP_384KHZ;
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_FS_SPEED_MODE,
+ PCM512x_FSSP, fssp);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to set fs speed: %d\n", ret);
+ return ret;
+ }
+
+ dev_dbg(codec->dev, "DSP divider %d\n", dsp_div);
+ dev_dbg(codec->dev, "DAC divider %d\n", dac_div);
+ dev_dbg(codec->dev, "NCP divider %d\n", ncp_div);
+ dev_dbg(codec->dev, "OSR divider %d\n", osr_div);
+ dev_dbg(codec->dev, "BCK divider %d\n", bclk_div);
+ dev_dbg(codec->dev, "LRCK divider %d\n", lrclk_div);
+ dev_dbg(codec->dev, "IDAC %d\n", idac);
+ dev_dbg(codec->dev, "1<<FSSP %d\n", 1 << fssp);
+
+ return 0;
+}
+
+static int pcm512x_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+ int alen;
+ int gpio;
+ int clock_output;
+ int master_mode;
+ int ret;
+
+ dev_dbg(codec->dev, "hw_params %u Hz, %u channels\n",
+ params_rate(params),
+ params_channels(params));
+
+ switch (snd_pcm_format_width(params_format(params))) {
+ case 16:
+ alen = PCM512x_ALEN_16;
+ break;
+ case 20:
+ alen = PCM512x_ALEN_20;
+ break;
+ case 24:
+ alen = PCM512x_ALEN_24;
+ break;
+ case 32:
+ alen = PCM512x_ALEN_32;
+ break;
+ default:
+ dev_err(codec->dev, "Bad frame size: %d\n",
+ snd_pcm_format_width(params_format(params)));
+ return -EINVAL;
+ }
+
+ switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ ret = regmap_update_bits(pcm512x->regmap,
+ PCM512x_BCLK_LRCLK_CFG,
+ PCM512x_BCKP
+ | PCM512x_BCKO | PCM512x_LRKO,
+ 0);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to enable slave mode: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT,
+ PCM512x_DCAS, 0);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to enable clock divider autoset: %d\n",
+ ret);
+ return ret;
+ }
+ return 0;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ clock_output = PCM512x_BCKO | PCM512x_LRKO;
+ master_mode = PCM512x_RLRK | PCM512x_RBCK;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFS:
+ clock_output = PCM512x_BCKO;
+ master_mode = PCM512x_RBCK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1,
+ PCM512x_ALEN, alen);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to set frame size: %d\n", ret);
+ return ret;
+ }
+
+ if (pcm512x->pll_out) {
+ ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_A, 0x11);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to set FLEX_A: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_B, 0xff);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to set FLEX_B: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT,
+ PCM512x_IDFS | PCM512x_IDBK
+ | PCM512x_IDSK | PCM512x_IDCH
+ | PCM512x_IDCM | PCM512x_DCAS
+ | PCM512x_IPLK,
+ PCM512x_IDFS | PCM512x_IDBK
+ | PCM512x_IDSK | PCM512x_IDCH
+ | PCM512x_DCAS);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to ignore auto-clock failures: %d\n",
+ ret);
+ return ret;
+ }
+ } else {
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT,
+ PCM512x_IDFS | PCM512x_IDBK
+ | PCM512x_IDSK | PCM512x_IDCH
+ | PCM512x_IDCM | PCM512x_DCAS
+ | PCM512x_IPLK,
+ PCM512x_IDFS | PCM512x_IDBK
+ | PCM512x_IDSK | PCM512x_IDCH
+ | PCM512x_DCAS | PCM512x_IPLK);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to ignore auto-clock failures: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN,
+ PCM512x_PLLE, 0);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to disable pll: %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = pcm512x_set_dividers(dai, params);
+ if (ret != 0)
+ return ret;
+
+ if (pcm512x->pll_out) {
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_REF,
+ PCM512x_SREF, PCM512x_SREF_GPIO);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to set gpio as pllref: %d\n", ret);
+ return ret;
+ }
+
+ gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1;
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_PLLIN,
+ PCM512x_GREF, gpio);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to set gpio %d as pllin: %d\n",
+ pcm512x->pll_in, ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN,
+ PCM512x_PLLE, PCM512x_PLLE);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable pll: %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_BCLK_LRCLK_CFG,
+ PCM512x_BCKP | PCM512x_BCKO | PCM512x_LRKO,
+ clock_output);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable clock output: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_MASTER_MODE,
+ PCM512x_RLRK | PCM512x_RBCK,
+ master_mode);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable master mode: %d\n", ret);
+ return ret;
+ }
+
+ if (pcm512x->pll_out) {
+ gpio = PCM512x_G1OE << (pcm512x->pll_out - 1);
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_EN,
+ gpio, gpio);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable gpio %d: %d\n",
+ pcm512x->pll_out, ret);
+ return ret;
+ }
+
+ gpio = PCM512x_GPIO_OUTPUT_1 + pcm512x->pll_out - 1;
+ ret = regmap_update_bits(pcm512x->regmap, gpio,
+ PCM512x_GxSL, PCM512x_GxSL_PLLCK);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to output pll on %d: %d\n",
+ ret, pcm512x->pll_out);
+ return ret;
+ }
+
+ gpio = PCM512x_G1OE << (4 - 1);
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_EN,
+ gpio, gpio);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable gpio %d: %d\n",
+ 4, ret);
+ return ret;
+ }
+
+ gpio = PCM512x_GPIO_OUTPUT_1 + 4 - 1;
+ ret = regmap_update_bits(pcm512x->regmap, gpio,
+ PCM512x_GxSL, PCM512x_GxSL_PLLLK);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to output pll lock on %d: %d\n",
+ ret, 4);
+ return ret;
+ }
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE,
+ PCM512x_RQSY, PCM512x_RQSY_HALT);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to halt clocks: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE,
+ PCM512x_RQSY, PCM512x_RQSY_RESUME);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to resume clocks: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int pcm512x_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ pcm512x->fmt = fmt;
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops pcm512x_dai_ops = {
+ .startup = pcm512x_dai_startup,
+ .hw_params = pcm512x_hw_params,
+ .set_fmt = pcm512x_set_fmt,
+};
+
static struct snd_soc_dai_driver pcm512x_dai = {
.name = "pcm512x-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
- .rates = SNDRV_PCM_RATE_8000_192000,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 8000,
+ .rate_max = 384000,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE
},
+ .ops = &pcm512x_dai_ops,
};
static struct snd_soc_codec_driver pcm512x_codec_driver = {
}
pcm512x->sclk = devm_clk_get(dev, NULL);
- if (IS_ERR(pcm512x->sclk)) {
- if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
- return -EPROBE_DEFER;
-
- dev_info(dev, "No SCLK, using BCLK: %ld\n",
- PTR_ERR(pcm512x->sclk));
-
- /* Disable reporting of missing SCLK as an error */
- regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
- PCM512x_IDCH, PCM512x_IDCH);
-
- /* Switch PLL input to BCLK */
- regmap_update_bits(regmap, PCM512x_PLL_REF,
- PCM512x_SREF, PCM512x_SREF);
- } else {
+ if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (!IS_ERR(pcm512x->sclk)) {
ret = clk_prepare_enable(pcm512x->sclk);
if (ret != 0) {
dev_err(dev, "Failed to enable SCLK: %d\n", ret);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
+#ifdef CONFIG_OF
+ if (dev->of_node) {
+ const struct device_node *np = dev->of_node;
+ u32 val;
+
+ if (of_property_read_u32(np, "pll-in", &val) >= 0) {
+ if (val > 6) {
+ dev_err(dev, "Invalid pll-in\n");
+ ret = -EINVAL;
+ goto err_clk;
+ }
+ pcm512x->pll_in = val;
+ }
+
+ if (of_property_read_u32(np, "pll-out", &val) >= 0) {
+ if (val > 6) {
+ dev_err(dev, "Invalid pll-out\n");
+ ret = -EINVAL;
+ goto err_clk;
+ }
+ pcm512x->pll_out = val;
+ }
+
+ if (!pcm512x->pll_in != !pcm512x->pll_out) {
+ dev_err(dev,
+ "Error: both pll-in and pll-out, or none\n");
+ ret = -EINVAL;
+ goto err_clk;
+ }
+ if (pcm512x->pll_in && pcm512x->pll_in == pcm512x->pll_out) {
+ dev_err(dev, "Error: pll-in == pll-out\n");
+ ret = -EINVAL;
+ goto err_clk;
+ }
+ }
+#endif
+
ret = snd_soc_register_codec(dev, &pcm512x_codec_driver,
&pcm512x_dai, 1);
if (ret != 0) {
projects / linux-2.6-block.git / blobdiff