// SPDX-License-Identifier: GPL-2.0-only /* * PCM3168A codec driver * * Copyright (C) 2015 Imagination Technologies Ltd. * * Author: Damien Horsley */ #include #include #include #include #include #include #include #include #include #include #include "pcm3168a.h" #define PCM3168A_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ SNDRV_PCM_FMTBIT_S24_3LE | \ SNDRV_PCM_FMTBIT_S24_LE) #define PCM3168A_FMT_I2S 0x0 #define PCM3168A_FMT_LEFT_J 0x1 #define PCM3168A_FMT_RIGHT_J 0x2 #define PCM3168A_FMT_RIGHT_J_16 0x3 #define PCM3168A_FMT_DSP_A 0x4 #define PCM3168A_FMT_DSP_B 0x5 #define PCM3168A_FMT_I2S_TDM 0x6 #define PCM3168A_FMT_LEFT_J_TDM 0x7 #define PCM3168A_FMT_DSP_MASK 0x4 #define PCM3168A_NUM_SUPPLIES 6 static const char *const pcm3168a_supply_names[PCM3168A_NUM_SUPPLIES] = { "VDD1", "VDD2", "VCCAD1", "VCCAD2", "VCCDA1", "VCCDA2" }; #define PCM3168A_DAI_DAC 0 #define PCM3168A_DAI_ADC 1 /* ADC/DAC side parameters */ struct pcm3168a_io_params { bool master_mode; unsigned int fmt; int tdm_slots; u32 tdm_mask; int slot_width; }; struct pcm3168a_priv { struct regulator_bulk_data supplies[PCM3168A_NUM_SUPPLIES]; struct regmap *regmap; struct clk *scki; struct gpio_desc *gpio_rst; unsigned long sysclk; struct pcm3168a_io_params io_params[2]; struct snd_soc_dai_driver dai_drv[2]; }; static const char *const pcm3168a_roll_off[] = { "Sharp", "Slow" }; static SOC_ENUM_SINGLE_DECL(pcm3168a_d1_roll_off, PCM3168A_DAC_OP_FLT, PCM3168A_DAC_FLT_SHIFT, pcm3168a_roll_off); static SOC_ENUM_SINGLE_DECL(pcm3168a_d2_roll_off, PCM3168A_DAC_OP_FLT, PCM3168A_DAC_FLT_SHIFT + 1, pcm3168a_roll_off); static SOC_ENUM_SINGLE_DECL(pcm3168a_d3_roll_off, PCM3168A_DAC_OP_FLT, PCM3168A_DAC_FLT_SHIFT + 2, pcm3168a_roll_off); static SOC_ENUM_SINGLE_DECL(pcm3168a_d4_roll_off, PCM3168A_DAC_OP_FLT, PCM3168A_DAC_FLT_SHIFT + 3, pcm3168a_roll_off); static const char *const pcm3168a_volume_type[] = { "Individual", "Master + Individual" }; static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_volume_type, PCM3168A_DAC_ATT_DEMP_ZF, PCM3168A_DAC_ATMDDA_SHIFT, pcm3168a_volume_type); static const char *const pcm3168a_att_speed_mult[] = { "2048", "4096" }; static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_att_mult, PCM3168A_DAC_ATT_DEMP_ZF, PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_att_speed_mult); static const char *const pcm3168a_demp[] = { "Disabled", "48khz", "44.1khz", "32khz" }; static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_demp, PCM3168A_DAC_ATT_DEMP_ZF, PCM3168A_DAC_DEMP_SHIFT, pcm3168a_demp); static const char *const pcm3168a_zf_func[] = { "DAC 1/2/3/4 AND", "DAC 1/2/3/4 OR", "DAC 1/2/3 AND", "DAC 1/2/3 OR", "DAC 4 AND", "DAC 4 OR" }; static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_func, PCM3168A_DAC_ATT_DEMP_ZF, PCM3168A_DAC_AZRO_SHIFT, pcm3168a_zf_func); static const char *const pcm3168a_pol[] = { "Active High", "Active Low" }; static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_pol, PCM3168A_DAC_ATT_DEMP_ZF, PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_pol); static const char *const pcm3168a_con[] = { "Differential", "Single-Ended" }; static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc1_con, PCM3168A_ADC_SEAD, 0, 1, pcm3168a_con); static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc2_con, PCM3168A_ADC_SEAD, 2, 3, pcm3168a_con); static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc3_con, PCM3168A_ADC_SEAD, 4, 5, pcm3168a_con); static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_volume_type, PCM3168A_ADC_ATT_OVF, PCM3168A_ADC_ATMDAD_SHIFT, pcm3168a_volume_type); static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_att_mult, PCM3168A_ADC_ATT_OVF, PCM3168A_ADC_ATSPAD_SHIFT, pcm3168a_att_speed_mult); static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_ov_pol, PCM3168A_ADC_ATT_OVF, PCM3168A_ADC_OVFP_SHIFT, pcm3168a_pol); /* -100db to 0db, register values 0-54 cause mute */ static const DECLARE_TLV_DB_SCALE(pcm3168a_dac_tlv, -10050, 50, 1); /* -100db to 20db, register values 0-14 cause mute */ static const DECLARE_TLV_DB_SCALE(pcm3168a_adc_tlv, -10050, 50, 1); static const struct snd_kcontrol_new pcm3168a_snd_controls[] = { SOC_SINGLE("DAC Power-Save Switch", PCM3168A_DAC_PWR_MST_FMT, PCM3168A_DAC_PSMDA_SHIFT, 1, 1), SOC_ENUM("DAC1 Digital Filter roll-off", pcm3168a_d1_roll_off), SOC_ENUM("DAC2 Digital Filter roll-off", pcm3168a_d2_roll_off), SOC_ENUM("DAC3 Digital Filter roll-off", pcm3168a_d3_roll_off), SOC_ENUM("DAC4 Digital Filter roll-off", pcm3168a_d4_roll_off), SOC_DOUBLE("DAC1 Invert Switch", PCM3168A_DAC_INV, 0, 1, 1, 0), SOC_DOUBLE("DAC2 Invert Switch", PCM3168A_DAC_INV, 2, 3, 1, 0), SOC_DOUBLE("DAC3 Invert Switch", PCM3168A_DAC_INV, 4, 5, 1, 0), SOC_DOUBLE("DAC4 Invert Switch", PCM3168A_DAC_INV, 6, 7, 1, 0), SOC_ENUM("DAC Volume Control Type", pcm3168a_dac_volume_type), SOC_ENUM("DAC Volume Rate Multiplier", pcm3168a_dac_att_mult), SOC_ENUM("DAC De-Emphasis", pcm3168a_dac_demp), SOC_ENUM("DAC Zero Flag Function", pcm3168a_dac_zf_func), SOC_ENUM("DAC Zero Flag Polarity", pcm3168a_dac_zf_pol), SOC_SINGLE_RANGE_TLV("Master Playback Volume", PCM3168A_DAC_VOL_MASTER, 0, 54, 255, 0, pcm3168a_dac_tlv), SOC_DOUBLE_R_RANGE_TLV("DAC1 Playback Volume", PCM3168A_DAC_VOL_CHAN_START, PCM3168A_DAC_VOL_CHAN_START + 1, 0, 54, 255, 0, pcm3168a_dac_tlv), SOC_DOUBLE_R_RANGE_TLV("DAC2 Playback Volume", PCM3168A_DAC_VOL_CHAN_START + 2, PCM3168A_DAC_VOL_CHAN_START + 3, 0, 54, 255, 0, pcm3168a_dac_tlv), SOC_DOUBLE_R_RANGE_TLV("DAC3 Playback Volume", PCM3168A_DAC_VOL_CHAN_START + 4, PCM3168A_DAC_VOL_CHAN_START + 5, 0, 54, 255, 0, pcm3168a_dac_tlv), SOC_DOUBLE_R_RANGE_TLV("DAC4 Playback Volume", PCM3168A_DAC_VOL_CHAN_START + 6, PCM3168A_DAC_VOL_CHAN_START + 7, 0, 54, 255, 0, pcm3168a_dac_tlv), SOC_SINGLE("ADC1 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB, PCM3168A_ADC_BYP_SHIFT, 1, 1), SOC_SINGLE("ADC2 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB, PCM3168A_ADC_BYP_SHIFT + 1, 1, 1), SOC_SINGLE("ADC3 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB, PCM3168A_ADC_BYP_SHIFT + 2, 1, 1), SOC_ENUM("ADC1 Connection Type", pcm3168a_adc1_con), SOC_ENUM("ADC2 Connection Type", pcm3168a_adc2_con), SOC_ENUM("ADC3 Connection Type", pcm3168a_adc3_con), SOC_DOUBLE("ADC1 Invert Switch", PCM3168A_ADC_INV, 0, 1, 1, 0), SOC_DOUBLE("ADC2 Invert Switch", PCM3168A_ADC_INV, 2, 3, 1, 0), SOC_DOUBLE("ADC3 Invert Switch", PCM3168A_ADC_INV, 4, 5, 1, 0), SOC_DOUBLE("ADC1 Mute Switch", PCM3168A_ADC_MUTE, 0, 1, 1, 0), SOC_DOUBLE("ADC2 Mute Switch", PCM3168A_ADC_MUTE, 2, 3, 1, 0), SOC_DOUBLE("ADC3 Mute Switch", PCM3168A_ADC_MUTE, 4, 5, 1, 0), SOC_ENUM("ADC Volume Control Type", pcm3168a_adc_volume_type), SOC_ENUM("ADC Volume Rate Multiplier", pcm3168a_adc_att_mult), SOC_ENUM("ADC Overflow Flag Polarity", pcm3168a_adc_ov_pol), SOC_SINGLE_RANGE_TLV("Master Capture Volume", PCM3168A_ADC_VOL_MASTER, 0, 14, 255, 0, pcm3168a_adc_tlv), SOC_DOUBLE_R_RANGE_TLV("ADC1 Capture Volume", PCM3168A_ADC_VOL_CHAN_START, PCM3168A_ADC_VOL_CHAN_START + 1, 0, 14, 255, 0, pcm3168a_adc_tlv), SOC_DOUBLE_R_RANGE_TLV("ADC2 Capture Volume", PCM3168A_ADC_VOL_CHAN_START + 2, PCM3168A_ADC_VOL_CHAN_START + 3, 0, 14, 255, 0, pcm3168a_adc_tlv), SOC_DOUBLE_R_RANGE_TLV("ADC3 Capture Volume", PCM3168A_ADC_VOL_CHAN_START + 4, PCM3168A_ADC_VOL_CHAN_START + 5, 0, 14, 255, 0, pcm3168a_adc_tlv) }; static const struct snd_soc_dapm_widget pcm3168a_dapm_widgets[] = { SND_SOC_DAPM_DAC("DAC1", "Playback", PCM3168A_DAC_OP_FLT, PCM3168A_DAC_OPEDA_SHIFT, 1), SND_SOC_DAPM_DAC("DAC2", "Playback", PCM3168A_DAC_OP_FLT, PCM3168A_DAC_OPEDA_SHIFT + 1, 1), SND_SOC_DAPM_DAC("DAC3", "Playback", PCM3168A_DAC_OP_FLT, PCM3168A_DAC_OPEDA_SHIFT + 2, 1), SND_SOC_DAPM_DAC("DAC4", "Playback", PCM3168A_DAC_OP_FLT, PCM3168A_DAC_OPEDA_SHIFT + 3, 1), SND_SOC_DAPM_OUTPUT("AOUT1L"), SND_SOC_DAPM_OUTPUT("AOUT1R"), SND_SOC_DAPM_OUTPUT("AOUT2L"), SND_SOC_DAPM_OUTPUT("AOUT2R"), SND_SOC_DAPM_OUTPUT("AOUT3L"), SND_SOC_DAPM_OUTPUT("AOUT3R"), SND_SOC_DAPM_OUTPUT("AOUT4L"), SND_SOC_DAPM_OUTPUT("AOUT4R"), SND_SOC_DAPM_ADC("ADC1", "Capture", PCM3168A_ADC_PWR_HPFB, PCM3168A_ADC_PSVAD_SHIFT, 1), SND_SOC_DAPM_ADC("ADC2", "Capture", PCM3168A_ADC_PWR_HPFB, PCM3168A_ADC_PSVAD_SHIFT + 1, 1), SND_SOC_DAPM_ADC("ADC3", "Capture", PCM3168A_ADC_PWR_HPFB, PCM3168A_ADC_PSVAD_SHIFT + 2, 1), SND_SOC_DAPM_INPUT("AIN1L"), SND_SOC_DAPM_INPUT("AIN1R"), SND_SOC_DAPM_INPUT("AIN2L"), SND_SOC_DAPM_INPUT("AIN2R"), SND_SOC_DAPM_INPUT("AIN3L"), SND_SOC_DAPM_INPUT("AIN3R") }; static const struct snd_soc_dapm_route pcm3168a_dapm_routes[] = { /* Playback */ { "AOUT1L", NULL, "DAC1" }, { "AOUT1R", NULL, "DAC1" }, { "AOUT2L", NULL, "DAC2" }, { "AOUT2R", NULL, "DAC2" }, { "AOUT3L", NULL, "DAC3" }, { "AOUT3R", NULL, "DAC3" }, { "AOUT4L", NULL, "DAC4" }, { "AOUT4R", NULL, "DAC4" }, /* Capture */ { "ADC1", NULL, "AIN1L" }, { "ADC1", NULL, "AIN1R" }, { "ADC2", NULL, "AIN2L" }, { "ADC2", NULL, "AIN2R" }, { "ADC3", NULL, "AIN3L" }, { "ADC3", NULL, "AIN3R" } }; static unsigned int pcm3168a_scki_ratios[] = { 768, 512, 384, 256, 192, 128 }; #define PCM3168A_NUM_SCKI_RATIOS_DAC ARRAY_SIZE(pcm3168a_scki_ratios) #define PCM3168A_NUM_SCKI_RATIOS_ADC (ARRAY_SIZE(pcm3168a_scki_ratios) - 2) #define PCM3168A_MAX_SYSCLK 36864000 static int pcm3168a_reset(struct pcm3168a_priv *pcm3168a) { int ret; ret = regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE, 0); if (ret) return ret; /* Internal reset is de-asserted after 3846 SCKI cycles */ msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk)); return regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE, PCM3168A_MRST_MASK | PCM3168A_SRST_MASK); } static int pcm3168a_mute(struct snd_soc_dai *dai, int mute, int direction) { struct snd_soc_component *component = dai->component; struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); regmap_write(pcm3168a->regmap, PCM3168A_DAC_MUTE, mute ? 0xff : 0); return 0; } static int pcm3168a_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int freq, int dir) { struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(dai->component); int ret; if (freq > PCM3168A_MAX_SYSCLK) return -EINVAL; ret = clk_set_rate(pcm3168a->scki, freq); if (ret) return ret; pcm3168a->sysclk = freq; return 0; } static void pcm3168a_update_fixup_pcm_stream(struct snd_soc_dai *dai) { struct snd_soc_component *component = dai->component; struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); u64 formats = SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE; unsigned int channel_max = dai->id == PCM3168A_DAI_DAC ? 8 : 6; if (pcm3168a->io_params[dai->id].fmt == PCM3168A_FMT_RIGHT_J) { /* S16_LE is only supported in RIGHT_J mode */ formats |= SNDRV_PCM_FMTBIT_S16_LE; /* * If multi DIN/DOUT is not selected, RIGHT_J can only support * two channels (no TDM support) */ if (pcm3168a->io_params[dai->id].tdm_slots != 2) channel_max = 2; } if (dai->id == PCM3168A_DAI_DAC) { dai->driver->playback.channels_max = channel_max; dai->driver->playback.formats = formats; } else { dai->driver->capture.channels_max = channel_max; dai->driver->capture.formats = formats; } } static int pcm3168a_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format) { struct snd_soc_component *component = dai->component; struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); u32 fmt, reg, mask, shift; bool master_mode; switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_LEFT_J: fmt = PCM3168A_FMT_LEFT_J; break; case SND_SOC_DAIFMT_I2S: fmt = PCM3168A_FMT_I2S; break; case SND_SOC_DAIFMT_RIGHT_J: fmt = PCM3168A_FMT_RIGHT_J; break; case SND_SOC_DAIFMT_DSP_A: fmt = PCM3168A_FMT_DSP_A; break; case SND_SOC_DAIFMT_DSP_B: fmt = PCM3168A_FMT_DSP_B; break; default: dev_err(component->dev, "unsupported dai format\n"); return -EINVAL; } switch (format & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: master_mode = false; break; case SND_SOC_DAIFMT_CBM_CFM: master_mode = true; break; default: dev_err(component->dev, "unsupported master/slave mode\n"); return -EINVAL; } switch (format & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; default: return -EINVAL; } if (dai->id == PCM3168A_DAI_DAC) { reg = PCM3168A_DAC_PWR_MST_FMT; mask = PCM3168A_DAC_FMT_MASK; shift = PCM3168A_DAC_FMT_SHIFT; } else { reg = PCM3168A_ADC_MST_FMT; mask = PCM3168A_ADC_FMTAD_MASK; shift = PCM3168A_ADC_FMTAD_SHIFT; } pcm3168a->io_params[dai->id].master_mode = master_mode; pcm3168a->io_params[dai->id].fmt = fmt; regmap_update_bits(pcm3168a->regmap, reg, mask, fmt << shift); pcm3168a_update_fixup_pcm_stream(dai); return 0; } static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) { struct snd_soc_component *component = dai->component; struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id]; if (tx_mask >= (1<= (1<dev, "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n", tx_mask, rx_mask, slots); return -EINVAL; } if (slot_width && (slot_width != 16 && slot_width != 24 && slot_width != 32 )) { dev_err(component->dev, "Unsupported slot_width %d\n", slot_width); return -EINVAL; } io_params->tdm_slots = slots; io_params->slot_width = slot_width; /* Ignore the not relevant mask for the DAI/direction */ if (dai->id == PCM3168A_DAI_DAC) io_params->tdm_mask = tx_mask; else io_params->tdm_mask = rx_mask; pcm3168a_update_fixup_pcm_stream(dai); return 0; } static int pcm3168a_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_component *component = dai->component; struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id]; bool master_mode; u32 val, mask, shift, reg; unsigned int rate, fmt, ratio, max_ratio; unsigned int tdm_slots; int i, slot_width; rate = params_rate(params); ratio = pcm3168a->sysclk / rate; if (dai->id == PCM3168A_DAI_DAC) { max_ratio = PCM3168A_NUM_SCKI_RATIOS_DAC; reg = PCM3168A_DAC_PWR_MST_FMT; mask = PCM3168A_DAC_MSDA_MASK; shift = PCM3168A_DAC_MSDA_SHIFT; } else { max_ratio = PCM3168A_NUM_SCKI_RATIOS_ADC; reg = PCM3168A_ADC_MST_FMT; mask = PCM3168A_ADC_MSAD_MASK; shift = PCM3168A_ADC_MSAD_SHIFT; } master_mode = io_params->master_mode; fmt = io_params->fmt; for (i = 0; i < max_ratio; i++) { if (pcm3168a_scki_ratios[i] == ratio) break; } if (i == max_ratio) { dev_err(component->dev, "unsupported sysclk ratio\n"); return -EINVAL; } if (io_params->slot_width) slot_width = io_params->slot_width; else slot_width = params_width(params); switch (slot_width) { case 16: if (master_mode || (fmt != PCM3168A_FMT_RIGHT_J)) { dev_err(component->dev, "16-bit slots are supported only for slave mode using right justified\n"); return -EINVAL; } fmt = PCM3168A_FMT_RIGHT_J_16; break; case 24: if (master_mode || (fmt & PCM3168A_FMT_DSP_MASK)) { dev_err(component->dev, "24-bit slots not supported in master mode, or slave mode using DSP\n"); return -EINVAL; } break; case 32: break; default: dev_err(component->dev, "unsupported frame size: %d\n", slot_width); return -EINVAL; } if (io_params->tdm_slots) tdm_slots = io_params->tdm_slots; else tdm_slots = params_channels(params); /* * Switch the codec to TDM mode when more than 2 TDM slots are needed * for the stream. * If pcm3168a->tdm_slots is not set or set to more than 2 (8/6 usually) * then DIN1/DOUT1 is used in TDM mode. * If pcm3168a->tdm_slots is set to 2 then DIN1/2/3/4 and DOUT1/2/3 is * used in normal mode, no need to switch to TDM modes. */ if (tdm_slots > 2) { switch (fmt) { case PCM3168A_FMT_I2S: case PCM3168A_FMT_DSP_A: fmt = PCM3168A_FMT_I2S_TDM; break; case PCM3168A_FMT_LEFT_J: case PCM3168A_FMT_DSP_B: fmt = PCM3168A_FMT_LEFT_J_TDM; break; default: dev_err(component->dev, "TDM is supported under DSP/I2S/Left_J only\n"); return -EINVAL; } } if (master_mode) val = ((i + 1) << shift); else val = 0; regmap_update_bits(pcm3168a->regmap, reg, mask, val); if (dai->id == PCM3168A_DAI_DAC) { mask = PCM3168A_DAC_FMT_MASK; shift = PCM3168A_DAC_FMT_SHIFT; } else { mask = PCM3168A_ADC_FMTAD_MASK; shift = PCM3168A_ADC_FMTAD_SHIFT; } regmap_update_bits(pcm3168a->regmap, reg, mask, fmt << shift); return 0; } static const struct snd_soc_dai_ops pcm3168a_dai_ops = { .set_fmt = pcm3168a_set_dai_fmt, .set_sysclk = pcm3168a_set_dai_sysclk, .hw_params = pcm3168a_hw_params, .mute_stream = pcm3168a_mute, .set_tdm_slot = pcm3168a_set_tdm_slot, .no_capture_mute = 1, }; static struct snd_soc_dai_driver pcm3168a_dais[] = { { .name = "pcm3168a-dac", .id = PCM3168A_DAI_DAC, .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 8, .rates = SNDRV_PCM_RATE_8000_192000, .formats = PCM3168A_FORMATS }, .ops = &pcm3168a_dai_ops }, { .name = "pcm3168a-adc", .id = PCM3168A_DAI_ADC, .capture = { .stream_name = "Capture", .channels_min = 1, .channels_max = 6, .rates = SNDRV_PCM_RATE_8000_96000, .formats = PCM3168A_FORMATS }, .ops = &pcm3168a_dai_ops }, }; static const struct reg_default pcm3168a_reg_default[] = { { PCM3168A_RST_SMODE, PCM3168A_MRST_MASK | PCM3168A_SRST_MASK }, { PCM3168A_DAC_PWR_MST_FMT, 0x00 }, { PCM3168A_DAC_OP_FLT, 0x00 }, { PCM3168A_DAC_INV, 0x00 }, { PCM3168A_DAC_MUTE, 0x00 }, { PCM3168A_DAC_ZERO, 0x00 }, { PCM3168A_DAC_ATT_DEMP_ZF, 0x00 }, { PCM3168A_DAC_VOL_MASTER, 0xff }, { PCM3168A_DAC_VOL_CHAN_START, 0xff }, { PCM3168A_DAC_VOL_CHAN_START + 1, 0xff }, { PCM3168A_DAC_VOL_CHAN_START + 2, 0xff }, { PCM3168A_DAC_VOL_CHAN_START + 3, 0xff }, { PCM3168A_DAC_VOL_CHAN_START + 4, 0xff }, { PCM3168A_DAC_VOL_CHAN_START + 5, 0xff }, { PCM3168A_DAC_VOL_CHAN_START + 6, 0xff }, { PCM3168A_DAC_VOL_CHAN_START + 7, 0xff }, { PCM3168A_ADC_SMODE, 0x00 }, { PCM3168A_ADC_MST_FMT, 0x00 }, { PCM3168A_ADC_PWR_HPFB, 0x00 }, { PCM3168A_ADC_SEAD, 0x00 }, { PCM3168A_ADC_INV, 0x00 }, { PCM3168A_ADC_MUTE, 0x00 }, { PCM3168A_ADC_OV, 0x00 }, { PCM3168A_ADC_ATT_OVF, 0x00 }, { PCM3168A_ADC_VOL_MASTER, 0xd3 }, { PCM3168A_ADC_VOL_CHAN_START, 0xd3 }, { PCM3168A_ADC_VOL_CHAN_START + 1, 0xd3 }, { PCM3168A_ADC_VOL_CHAN_START + 2, 0xd3 }, { PCM3168A_ADC_VOL_CHAN_START + 3, 0xd3 }, { PCM3168A_ADC_VOL_CHAN_START + 4, 0xd3 }, { PCM3168A_ADC_VOL_CHAN_START + 5, 0xd3 } }; static bool pcm3168a_readable_register(struct device *dev, unsigned int reg) { if (reg >= PCM3168A_RST_SMODE) return true; else return false; } static bool pcm3168a_volatile_register(struct device *dev, unsigned int reg) { switch (reg) { case PCM3168A_RST_SMODE: case PCM3168A_DAC_ZERO: case PCM3168A_ADC_OV: return true; default: return false; } } static bool pcm3168a_writeable_register(struct device *dev, unsigned int reg) { if (reg < PCM3168A_RST_SMODE) return false; switch (reg) { case PCM3168A_DAC_ZERO: case PCM3168A_ADC_OV: return false; default: return true; } } const struct regmap_config pcm3168a_regmap = { .reg_bits = 8, .val_bits = 8, .max_register = PCM3168A_ADC_VOL_CHAN_START + 5, .reg_defaults = pcm3168a_reg_default, .num_reg_defaults = ARRAY_SIZE(pcm3168a_reg_default), .readable_reg = pcm3168a_readable_register, .volatile_reg = pcm3168a_volatile_register, .writeable_reg = pcm3168a_writeable_register, .cache_type = REGCACHE_FLAT }; EXPORT_SYMBOL_GPL(pcm3168a_regmap); static const struct snd_soc_component_driver pcm3168a_driver = { .controls = pcm3168a_snd_controls, .num_controls = ARRAY_SIZE(pcm3168a_snd_controls), .dapm_widgets = pcm3168a_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(pcm3168a_dapm_widgets), .dapm_routes = pcm3168a_dapm_routes, .num_dapm_routes = ARRAY_SIZE(pcm3168a_dapm_routes), .use_pmdown_time = 1, .endianness = 1, .non_legacy_dai_naming = 1, }; int pcm3168a_probe(struct device *dev, struct regmap *regmap) { struct pcm3168a_priv *pcm3168a; int ret, i; pcm3168a = devm_kzalloc(dev, sizeof(*pcm3168a), GFP_KERNEL); if (pcm3168a == NULL) return -ENOMEM; dev_set_drvdata(dev, pcm3168a); /* * Request the reset (connected to RST pin) gpio line as non exclusive * as the same reset line might be connected to multiple pcm3168a codec * * The RST is low active, we want the GPIO line to be high initially, so * request the initial level to LOW which in practice means DEASSERTED: * The deasserted level of GPIO_ACTIVE_LOW is HIGH. */ pcm3168a->gpio_rst = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); if (IS_ERR(pcm3168a->gpio_rst)) { ret = PTR_ERR(pcm3168a->gpio_rst); if (ret != -EPROBE_DEFER ) dev_err(dev, "failed to acquire RST gpio: %d\n", ret); return ret; } pcm3168a->scki = devm_clk_get(dev, "scki"); if (IS_ERR(pcm3168a->scki)) { ret = PTR_ERR(pcm3168a->scki); if (ret != -EPROBE_DEFER) dev_err(dev, "failed to acquire clock 'scki': %d\n", ret); return ret; } ret = clk_prepare_enable(pcm3168a->scki); if (ret) { dev_err(dev, "Failed to enable mclk: %d\n", ret); return ret; } pcm3168a->sysclk = clk_get_rate(pcm3168a->scki); for (i = 0; i < ARRAY_SIZE(pcm3168a->supplies); i++) pcm3168a->supplies[i].supply = pcm3168a_supply_names[i]; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies); if (ret) { if (ret != -EPROBE_DEFER) dev_err(dev, "failed to request supplies: %d\n", ret); goto err_clk; } ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies); if (ret) { dev_err(dev, "failed to enable supplies: %d\n", ret); goto err_clk; } pcm3168a->regmap = regmap; if (IS_ERR(pcm3168a->regmap)) { ret = PTR_ERR(pcm3168a->regmap); dev_err(dev, "failed to allocate regmap: %d\n", ret); goto err_regulator; } if (pcm3168a->gpio_rst) { /* * The device is taken out from reset via GPIO line, wait for * 3846 SCKI clock cycles for the internal reset de-assertion */ msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk)); } else { ret = pcm3168a_reset(pcm3168a); if (ret) { dev_err(dev, "Failed to reset device: %d\n", ret); goto err_regulator; } } pm_runtime_set_active(dev); pm_runtime_enable(dev); pm_runtime_idle(dev); memcpy(pcm3168a->dai_drv, pcm3168a_dais, sizeof(pcm3168a->dai_drv)); ret = devm_snd_soc_register_component(dev, &pcm3168a_driver, pcm3168a->dai_drv, ARRAY_SIZE(pcm3168a->dai_drv)); if (ret) { dev_err(dev, "failed to register component: %d\n", ret); goto err_regulator; } return 0; err_regulator: regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies); err_clk: clk_disable_unprepare(pcm3168a->scki); return ret; } EXPORT_SYMBOL_GPL(pcm3168a_probe); static void pcm3168a_disable(struct device *dev) { struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies); clk_disable_unprepare(pcm3168a->scki); } void pcm3168a_remove(struct device *dev) { struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); /* * The RST is low active, we want the GPIO line to be low when the * driver is removed, so set level to 1 which in practice means * ASSERTED: * The asserted level of GPIO_ACTIVE_LOW is LOW. */ gpiod_set_value_cansleep(pcm3168a->gpio_rst, 1); pm_runtime_disable(dev); #ifndef CONFIG_PM pcm3168a_disable(dev); #endif } EXPORT_SYMBOL_GPL(pcm3168a_remove); #ifdef CONFIG_PM static int pcm3168a_rt_resume(struct device *dev) { struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); int ret; ret = clk_prepare_enable(pcm3168a->scki); if (ret) { dev_err(dev, "Failed to enable mclk: %d\n", ret); return ret; } ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies); if (ret) { dev_err(dev, "Failed to enable supplies: %d\n", ret); goto err_clk; } ret = pcm3168a_reset(pcm3168a); if (ret) { dev_err(dev, "Failed to reset device: %d\n", ret); goto err_regulator; } regcache_cache_only(pcm3168a->regmap, false); regcache_mark_dirty(pcm3168a->regmap); ret = regcache_sync(pcm3168a->regmap); if (ret) { dev_err(dev, "Failed to sync regmap: %d\n", ret); goto err_regulator; } return 0; err_regulator: regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies); err_clk: clk_disable_unprepare(pcm3168a->scki); return ret; } static int pcm3168a_rt_suspend(struct device *dev) { struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); regcache_cache_only(pcm3168a->regmap, true); pcm3168a_disable(dev); return 0; } #endif const struct dev_pm_ops pcm3168a_pm_ops = { SET_RUNTIME_PM_OPS(pcm3168a_rt_suspend, pcm3168a_rt_resume, NULL) }; EXPORT_SYMBOL_GPL(pcm3168a_pm_ops); MODULE_DESCRIPTION("PCM3168A codec driver"); MODULE_AUTHOR("Damien Horsley "); MODULE_LICENSE("GPL v2");