--- /dev/null
+/*
+ * Driver for the PCM512x CODECs
+ *
+ * Author: Mark Brown <broonie@linaro.org>
+ * Copyright 2014 Linaro Ltd
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#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 PCM512x_NUM_SUPPLIES 3
+static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = {
+ "AVDD",
+ "DVDD",
+ "CPVDD",
+};
+
+struct pcm512x_priv {
+ struct regmap *regmap;
+ 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;
+ unsigned long overclock_pll;
+ unsigned long overclock_dac;
+ unsigned long overclock_dsp;
+};
+
+/*
+ * We can't use the same notifier block for more than one supply and
+ * there's no way I can see to get from a callback to the caller
+ * except container_of().
+ */
+#define PCM512x_REGULATOR_EVENT(n) \
+static int pcm512x_regulator_event_##n(struct notifier_block *nb, \
+ unsigned long event, void *data) \
+{ \
+ struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \
+ supply_nb[n]); \
+ if (event & REGULATOR_EVENT_DISABLE) { \
+ regcache_mark_dirty(pcm512x->regmap); \
+ regcache_cache_only(pcm512x->regmap, true); \
+ } \
+ return 0; \
+}
+
+PCM512x_REGULATOR_EVENT(0)
+PCM512x_REGULATOR_EVENT(1)
+PCM512x_REGULATOR_EVENT(2)
+
+static const struct reg_default pcm512x_reg_defaults[] = {
+ { PCM512x_RESET, 0x00 },
+ { PCM512x_POWER, 0x00 },
+ { 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_AUTO_MUTE, 0x00 },
+ { PCM512x_ERROR_DETECT, 0x00 },
+ { PCM512x_DIGITAL_VOLUME_1, 0x00 },
+ { PCM512x_DIGITAL_VOLUME_2, 0x30 },
+ { PCM512x_DIGITAL_VOLUME_3, 0x30 },
+ { PCM512x_DIGITAL_MUTE_1, 0x22 },
+ { PCM512x_DIGITAL_MUTE_2, 0x00 },
+ { PCM512x_DIGITAL_MUTE_3, 0x07 },
+ { PCM512x_OUTPUT_AMPLITUDE, 0x00 },
+ { PCM512x_ANALOG_GAIN_CTRL, 0x00 },
+ { PCM512x_UNDERVOLTAGE_PROT, 0x00 },
+ { PCM512x_ANALOG_MUTE_CTRL, 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)
+{
+ switch (reg) {
+ case PCM512x_RESET:
+ case PCM512x_POWER:
+ case PCM512x_MUTE:
+ case PCM512x_PLL_EN:
+ case PCM512x_SPI_MISO_FUNCTION:
+ case PCM512x_DSP:
+ case PCM512x_GPIO_EN:
+ case PCM512x_BCLK_LRCLK_CFG:
+ 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_PLL_COEFF_3:
+ case PCM512x_PLL_COEFF_4:
+ case PCM512x_DSP_CLKDIV:
+ case PCM512x_DAC_CLKDIV:
+ case PCM512x_NCP_CLKDIV:
+ case PCM512x_OSR_CLKDIV:
+ case PCM512x_MASTER_CLKDIV_1:
+ case PCM512x_MASTER_CLKDIV_2:
+ case PCM512x_FS_SPEED_MODE:
+ case PCM512x_IDAC_1:
+ case PCM512x_IDAC_2:
+ case PCM512x_ERROR_DETECT:
+ case PCM512x_I2S_1:
+ case PCM512x_I2S_2:
+ case PCM512x_DAC_ROUTING:
+ case PCM512x_DSP_PROGRAM:
+ case PCM512x_CLKDET:
+ case PCM512x_AUTO_MUTE:
+ case PCM512x_DIGITAL_VOLUME_1:
+ case PCM512x_DIGITAL_VOLUME_2:
+ case PCM512x_DIGITAL_VOLUME_3:
+ case PCM512x_DIGITAL_MUTE_1:
+ case PCM512x_DIGITAL_MUTE_2:
+ case PCM512x_DIGITAL_MUTE_3:
+ case PCM512x_GPIO_OUTPUT_1:
+ case PCM512x_GPIO_OUTPUT_2:
+ case PCM512x_GPIO_OUTPUT_3:
+ case PCM512x_GPIO_OUTPUT_4:
+ case PCM512x_GPIO_OUTPUT_5:
+ case PCM512x_GPIO_OUTPUT_6:
+ case PCM512x_GPIO_CONTROL_1:
+ case PCM512x_GPIO_CONTROL_2:
+ case PCM512x_OVERFLOW:
+ case PCM512x_RATE_DET_1:
+ 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_OUTPUT_AMPLITUDE:
+ case PCM512x_ANALOG_GAIN_CTRL:
+ case PCM512x_UNDERVOLTAGE_PROT:
+ case PCM512x_ANALOG_MUTE_CTRL:
+ case PCM512x_ANALOG_GAIN_BOOST:
+ 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 */
+ return reg < 0xff;
+ }
+}
+
+static bool pcm512x_volatile(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case PCM512x_PLL_EN:
+ case PCM512x_OVERFLOW:
+ case PCM512x_RATE_DET_1:
+ 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_CRAM_CTRL:
+ return true;
+ default:
+ /* There are 256 raw register addresses */
+ return reg < 0xff;
+ }
+}
+
+static int pcm512x_overclock_pll_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ ucontrol->value.integer.value[0] = pcm512x->overclock_pll;
+ return 0;
+}
+
+static int pcm512x_overclock_pll_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ switch (codec->dapm.bias_level) {
+ case SND_SOC_BIAS_OFF:
+ case SND_SOC_BIAS_STANDBY:
+ break;
+ default:
+ return -EBUSY;
+ }
+
+ pcm512x->overclock_pll = ucontrol->value.integer.value[0];
+ return 0;
+}
+
+static int pcm512x_overclock_dsp_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ ucontrol->value.integer.value[0] = pcm512x->overclock_dsp;
+ return 0;
+}
+
+static int pcm512x_overclock_dsp_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ switch (codec->dapm.bias_level) {
+ case SND_SOC_BIAS_OFF:
+ case SND_SOC_BIAS_STANDBY:
+ break;
+ default:
+ return -EBUSY;
+ }
+
+ pcm512x->overclock_dsp = ucontrol->value.integer.value[0];
+ return 0;
+}
+
+static int pcm512x_overclock_dac_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ ucontrol->value.integer.value[0] = pcm512x->overclock_dac;
+ return 0;
+}
+
+static int pcm512x_overclock_dac_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+
+ switch (codec->dapm.bias_level) {
+ case SND_SOC_BIAS_OFF:
+ case SND_SOC_BIAS_STANDBY:
+ break;
+ default:
+ return -EBUSY;
+ }
+
+ pcm512x->overclock_dac = ucontrol->value.integer.value[0];
+ return 0;
+}
+
+static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1);
+static const DECLARE_TLV_DB_SCALE(analog_tlv, -600, 600, 0);
+static const DECLARE_TLV_DB_SCALE(boost_tlv, 0, 80, 0);
+
+static const char * const pcm512x_dsp_program_texts[] = {
+ "FIR interpolation with de-emphasis",
+ "Low latency IIR with de-emphasis",
+ "High attenuation with de-emphasis",
+ "Fixed process flow",
+ "Ringing-less low latency FIR",
+};
+
+static const unsigned int pcm512x_dsp_program_values[] = {
+ 1,
+ 2,
+ 3,
+ 5,
+ 7,
+};
+
+static SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program,
+ PCM512x_DSP_PROGRAM, 0, 0x1f,
+ pcm512x_dsp_program_texts,
+ pcm512x_dsp_program_values);
+
+static const char * const pcm512x_clk_missing_text[] = {
+ "1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s"
+};
+
+static const struct soc_enum pcm512x_clk_missing =
+ SOC_ENUM_SINGLE(PCM512x_CLKDET, 0, 8, pcm512x_clk_missing_text);
+
+static const char * const pcm512x_autom_text[] = {
+ "21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s"
+};
+
+static const struct soc_enum pcm512x_autom_l =
+ SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 8,
+ pcm512x_autom_text);
+
+static const struct soc_enum pcm512x_autom_r =
+ SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 8,
+ pcm512x_autom_text);
+
+static const char * const pcm512x_ramp_rate_text[] = {
+ "1 sample/update", "2 samples/update", "4 samples/update",
+ "Immediate"
+};
+
+static const struct soc_enum pcm512x_vndf =
+ SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4,
+ pcm512x_ramp_rate_text);
+
+static const struct soc_enum pcm512x_vnuf =
+ SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4,
+ pcm512x_ramp_rate_text);
+
+static const struct soc_enum pcm512x_vedf =
+ SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4,
+ pcm512x_ramp_rate_text);
+
+static const char * const pcm512x_ramp_step_text[] = {
+ "4dB/step", "2dB/step", "1dB/step", "0.5dB/step"
+};
+
+static const struct soc_enum pcm512x_vnds =
+ SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4,
+ pcm512x_ramp_step_text);
+
+static const struct soc_enum pcm512x_vnus =
+ SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4,
+ pcm512x_ramp_step_text);
+
+static const struct soc_enum pcm512x_veds =
+ SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
+ pcm512x_ramp_step_text);
+
+static const struct snd_kcontrol_new pcm512x_controls[] = {
+SOC_DOUBLE_R_TLV("Digital Playback Volume", PCM512x_DIGITAL_VOLUME_2,
+ PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
+SOC_DOUBLE_TLV("Analogue Playback Volume", PCM512x_ANALOG_GAIN_CTRL,
+ PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv),
+SOC_DOUBLE_TLV("Analogue Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST,
+ PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv),
+SOC_DOUBLE("Digital Playback Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
+ PCM512x_RQMR_SHIFT, 1, 1),
+
+SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1),
+SOC_ENUM("DSP Program", pcm512x_dsp_program),
+
+SOC_ENUM("Clock Missing Period", pcm512x_clk_missing),
+SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l),
+SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r),
+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_AMRE_SHIFT, 1, 0),
+
+SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf),
+SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds),
+SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf),
+SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus),
+SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf),
+SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds),
+
+SOC_SINGLE_EXT("Max Overclock PLL", SND_SOC_NOPM, 0, 20, 0,
+ pcm512x_overclock_pll_get, pcm512x_overclock_pll_put),
+SOC_SINGLE_EXT("Max Overclock DSP", SND_SOC_NOPM, 0, 40, 0,
+ pcm512x_overclock_dsp_get, pcm512x_overclock_dsp_put),
+SOC_SINGLE_EXT("Max Overclock DAC", SND_SOC_NOPM, 0, 40, 0,
+ pcm512x_overclock_dac_get, pcm512x_overclock_dac_put),
+};
+
+static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
+
+SND_SOC_DAPM_OUTPUT("OUTL"),
+SND_SOC_DAPM_OUTPUT("OUTR"),
+};
+
+static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = {
+ { "DACL", NULL, "Playback" },
+ { "DACR", NULL, "Playback" },
+
+ { "OUTL", NULL, "DACL" },
+ { "OUTR", NULL, "DACR" },
+};
+
+static unsigned long pcm512x_pll_max(struct pcm512x_priv *pcm512x)
+{
+ return 25000000 + 25000000 * pcm512x->overclock_pll / 100;
+}
+
+static unsigned long pcm512x_dsp_max(struct pcm512x_priv *pcm512x)
+{
+ return 50000000 + 50000000 * pcm512x->overclock_dsp / 100;
+}
+
+static unsigned long pcm512x_dac_max(struct pcm512x_priv *pcm512x,
+ unsigned long rate)
+{
+ return rate + rate * pcm512x->overclock_dac / 100;
+}
+
+static unsigned long pcm512x_sck_max(struct pcm512x_priv *pcm512x)
+{
+ if (!pcm512x->pll_out)
+ return 25000000;
+ return pcm512x_pll_max(pcm512x);
+}
+
+static unsigned long pcm512x_ncp_target(struct pcm512x_priv *pcm512x,
+ unsigned long dac_rate)
+{
+ /*
+ * If the DAC is not actually overclocked, use the good old
+ * NCP target rate...
+ */
+ if (dac_rate <= 6144000)
+ return 1536000;
+ /*
+ * ...but if the DAC is in fact overclocked, bump the NCP target
+ * rate to get the recommended dividers even when overclocking.
+ */
+ return pcm512x_dac_max(pcm512x, 1536000);
+}
+
+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 pcm512x_priv *pcm512x = rule->private;
+ 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 = pcm512x_sck_max(pcm512x) / 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,
+ pcm512x,
+ 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)
+{
+ struct pcm512x_priv *pcm512x = dev_get_drvdata(codec->dev);
+ int ret;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ case SND_SOC_BIAS_PREPARE:
+ break;
+
+ case SND_SOC_BIAS_STANDBY:
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+ PCM512x_RQST, 0);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to remove standby: %d\n",
+ ret);
+ return ret;
+ }
+ break;
+
+ case SND_SOC_BIAS_OFF:
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+ PCM512x_RQST, PCM512x_RQST);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to request standby: %d\n",
+ ret);
+ return ret;
+ }
+ break;
+ }
+
+ codec->dapm.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;
+ struct snd_soc_codec *codec = dai->codec;
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
+ 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((pcm512x_pll_max(pcm512x) - 16000000) / bclk_rate);
+ for (; pow2; pow2 >>= 1) {
+ sck_rate = rounddown(pcm512x_pll_max(pcm512x),
+ 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 *= DIV_ROUND_UP(pllin_rate / den, 20000000);
+ den *= DIV_ROUND_UP(pllin_rate / den, 20000000);
+ }
+ 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(pcm512x_dac_max(pcm512x, 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 > pcm512x_dsp_max(pcm512x) ? 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 = pcm512x_dac_max(pcm512x, 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;
+ }
+
+ osr_div = DIV_ROUND_CLOSEST(dac_rate, osr_rate);
+ if (osr_div > 128) {
+ dev_err(dev, "Failed to find OSR divider\n");
+ return -EINVAL;
+ }
+
+ dac_div = DIV_ROUND_CLOSEST(dacsrc_rate, dac_rate);
+ if (dac_div > 128) {
+ dev_err(dev, "Failed to find DAC divider\n");
+ return -EINVAL;
+ }
+ dac_rate = dacsrc_rate / dac_div;
+
+ ncp_div = DIV_ROUND_CLOSEST(dac_rate,
+ pcm512x_ncp_target(pcm512x, dac_rate));
+ if (ncp_div > 128 || dac_rate / ncp_div > 2048000) {
+ /* run NCP no faster than 2048000 Hz, but why? */
+ ncp_div = DIV_ROUND_UP(dac_rate, 2048000);
+ if (ncp_div > 128) {
+ dev_err(dev, "Failed to find NCP 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 <= pcm512x_dac_max(pcm512x, 48000))
+ fssp = PCM512x_FSSP_48KHZ;
+ else if (sample_rate <= pcm512x_dac_max(pcm512x, 96000))
+ fssp = PCM512x_FSSP_96KHZ;
+ else if (sample_rate <= pcm512x_dac_max(pcm512x, 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;
+ }
+ }
+
+ 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_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 = {
+ .set_bias_level = pcm512x_set_bias_level,
+ .idle_bias_off = true,
+
+ .controls = pcm512x_controls,
+ .num_controls = ARRAY_SIZE(pcm512x_controls),
+ .dapm_widgets = pcm512x_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets),
+ .dapm_routes = pcm512x_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes),
+};
+
+static const struct regmap_range_cfg pcm512x_range = {
+ .name = "Pages", .range_min = PCM512x_VIRT_BASE,
+ .range_max = PCM512x_MAX_REGISTER,
+ .selector_reg = PCM512x_PAGE,
+ .selector_mask = 0xff,
+ .window_start = 0, .window_len = 0x100,
+};
+
+const struct regmap_config pcm512x_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .readable_reg = pcm512x_readable,
+ .volatile_reg = pcm512x_volatile,
+
+ .ranges = &pcm512x_range,
+ .num_ranges = 1,
+
+ .max_register = PCM512x_MAX_REGISTER,
+ .reg_defaults = pcm512x_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+};
+EXPORT_SYMBOL_GPL(pcm512x_regmap);
+
+int pcm512x_probe(struct device *dev, struct regmap *regmap)
+{
+ struct pcm512x_priv *pcm512x;
+ int i, ret;
+
+ pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL);
+ if (!pcm512x)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, pcm512x);
+ pcm512x->regmap = regmap;
+
+ for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++)
+ pcm512x->supplies[i].supply = pcm512x_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies),
+ pcm512x->supplies);
+ if (ret != 0) {
+ dev_err(dev, "Failed to get supplies: %d\n", ret);
+ return ret;
+ }
+
+ pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0;
+ pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1;
+ pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2;
+
+ for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) {
+ ret = regulator_register_notifier(pcm512x->supplies[i].consumer,
+ &pcm512x->supply_nb[i]);
+ if (ret != 0) {
+ dev_err(dev,
+ "Failed to register regulator notifier: %d\n",
+ ret);
+ }
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
+ pcm512x->supplies);
+ if (ret != 0) {
+ dev_err(dev, "Failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ /* Reset the device, verifying I/O in the process for I2C */
+ ret = regmap_write(regmap, PCM512x_RESET,
+ PCM512x_RSTM | PCM512x_RSTR);
+ if (ret != 0) {
+ dev_err(dev, "Failed to reset device: %d\n", ret);
+ goto err;
+ }
+
+ ret = regmap_write(regmap, PCM512x_RESET, 0);
+ if (ret != 0) {
+ dev_err(dev, "Failed to reset device: %d\n", ret);
+ goto err;
+ }
+
+ pcm512x->sclk = devm_clk_get(dev, NULL);
+ 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);
+ return ret;
+ }
+ }
+
+ /* Default to standby mode */
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+ PCM512x_RQST, PCM512x_RQST);
+ if (ret != 0) {
+ dev_err(dev, "Failed to request standby: %d\n",
+ ret);
+ goto err_clk;
+ }
+
+ pm_runtime_set_active(dev);
+ 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) {
+ dev_err(dev, "Failed to register CODEC: %d\n", ret);
+ goto err_pm;
+ }
+
+ return 0;
+
+err_pm:
+ pm_runtime_disable(dev);
+err_clk:
+ if (!IS_ERR(pcm512x->sclk))
+ clk_disable_unprepare(pcm512x->sclk);
+err:
+ regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
+ pcm512x->supplies);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pcm512x_probe);
+
+void pcm512x_remove(struct device *dev)
+{
+ struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+
+ snd_soc_unregister_codec(dev);
+ pm_runtime_disable(dev);
+ if (!IS_ERR(pcm512x->sclk))
+ clk_disable_unprepare(pcm512x->sclk);
+ regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
+ pcm512x->supplies);
+}
+EXPORT_SYMBOL_GPL(pcm512x_remove);
+
+#ifdef CONFIG_PM
+static int pcm512x_suspend(struct device *dev)
+{
+ struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+ PCM512x_RQPD, PCM512x_RQPD);
+ if (ret != 0) {
+ dev_err(dev, "Failed to request power down: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
+ pcm512x->supplies);
+ if (ret != 0) {
+ dev_err(dev, "Failed to disable supplies: %d\n", ret);
+ return ret;
+ }
+
+ if (!IS_ERR(pcm512x->sclk))
+ clk_disable_unprepare(pcm512x->sclk);
+
+ return 0;
+}
+
+static int pcm512x_resume(struct device *dev)
+{
+ struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+ int ret;
+
+ if (!IS_ERR(pcm512x->sclk)) {
+ ret = clk_prepare_enable(pcm512x->sclk);
+ if (ret != 0) {
+ dev_err(dev, "Failed to enable SCLK: %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
+ pcm512x->supplies);
+ if (ret != 0) {
+ dev_err(dev, "Failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ regcache_cache_only(pcm512x->regmap, false);
+ ret = regcache_sync(pcm512x->regmap);
+ if (ret != 0) {
+ dev_err(dev, "Failed to sync cache: %d\n", ret);
+ return ret;
+ }
+
+ ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
+ PCM512x_RQPD, 0);
+ if (ret != 0) {
+ dev_err(dev, "Failed to remove power down: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+const struct dev_pm_ops pcm512x_pm_ops = {
+ SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL)
+};
+EXPORT_SYMBOL_GPL(pcm512x_pm_ops);
+
+MODULE_DESCRIPTION("ASoC PCM512x codec driver");
+MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff