/* * SSM4567 amplifier audio driver * * Copyright 2014 Google Chromium project. * Author: Anatol Pomozov <anatol@chromium.org> * * Based on code copyright/by: * Copyright 2013 Analog Devices Inc. * * Licensed under the GPL-2. */ #include <linux/acpi.h> #include <linux/module.h> #include <linux/init.h> #include <linux/i2c.h> #include <linux/regmap.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <sound/initval.h> #include <sound/tlv.h> #define SSM4567_REG_POWER_CTRL 0x00 #define SSM4567_REG_AMP_SNS_CTRL 0x01 #define SSM4567_REG_DAC_CTRL 0x02 #define SSM4567_REG_DAC_VOLUME 0x03 #define SSM4567_REG_SAI_CTRL_1 0x04 #define SSM4567_REG_SAI_CTRL_2 0x05 #define SSM4567_REG_SAI_PLACEMENT_1 0x06 #define SSM4567_REG_SAI_PLACEMENT_2 0x07 #define SSM4567_REG_SAI_PLACEMENT_3 0x08 #define SSM4567_REG_SAI_PLACEMENT_4 0x09 #define SSM4567_REG_SAI_PLACEMENT_5 0x0a #define SSM4567_REG_SAI_PLACEMENT_6 0x0b #define SSM4567_REG_BATTERY_V_OUT 0x0c #define SSM4567_REG_LIMITER_CTRL_1 0x0d #define SSM4567_REG_LIMITER_CTRL_2 0x0e #define SSM4567_REG_LIMITER_CTRL_3 0x0f #define SSM4567_REG_STATUS_1 0x10 #define SSM4567_REG_STATUS_2 0x11 #define SSM4567_REG_FAULT_CTRL 0x12 #define SSM4567_REG_PDM_CTRL 0x13 #define SSM4567_REG_MCLK_RATIO 0x14 #define SSM4567_REG_BOOST_CTRL_1 0x15 #define SSM4567_REG_BOOST_CTRL_2 0x16 #define SSM4567_REG_SOFT_RESET 0xff /* POWER_CTRL */ #define SSM4567_POWER_APWDN_EN BIT(7) #define SSM4567_POWER_BSNS_PWDN BIT(6) #define SSM4567_POWER_VSNS_PWDN BIT(5) #define SSM4567_POWER_ISNS_PWDN BIT(4) #define SSM4567_POWER_BOOST_PWDN BIT(3) #define SSM4567_POWER_AMP_PWDN BIT(2) #define SSM4567_POWER_VBAT_ONLY BIT(1) #define SSM4567_POWER_SPWDN BIT(0) /* DAC_CTRL */ #define SSM4567_DAC_HV BIT(7) #define SSM4567_DAC_MUTE BIT(6) #define SSM4567_DAC_HPF BIT(5) #define SSM4567_DAC_LPM BIT(4) #define SSM4567_DAC_FS_MASK 0x7 #define SSM4567_DAC_FS_8000_12000 0x0 #define SSM4567_DAC_FS_16000_24000 0x1 #define SSM4567_DAC_FS_32000_48000 0x2 #define SSM4567_DAC_FS_64000_96000 0x3 #define SSM4567_DAC_FS_128000_192000 0x4 /* SAI_CTRL_1 */ #define SSM4567_SAI_CTRL_1_BCLK BIT(6) #define SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK (0x3 << 4) #define SSM4567_SAI_CTRL_1_TDM_BLCKS_32 (0x0 << 4) #define SSM4567_SAI_CTRL_1_TDM_BLCKS_48 (0x1 << 4) #define SSM4567_SAI_CTRL_1_TDM_BLCKS_64 (0x2 << 4) #define SSM4567_SAI_CTRL_1_FSYNC BIT(3) #define SSM4567_SAI_CTRL_1_LJ BIT(2) #define SSM4567_SAI_CTRL_1_TDM BIT(1) #define SSM4567_SAI_CTRL_1_PDM BIT(0) /* SAI_CTRL_2 */ #define SSM4567_SAI_CTRL_2_AUTO_SLOT BIT(3) #define SSM4567_SAI_CTRL_2_TDM_SLOT_MASK 0x7 #define SSM4567_SAI_CTRL_2_TDM_SLOT(x) (x) struct ssm4567 { struct regmap *regmap; }; static const struct reg_default ssm4567_reg_defaults[] = { { SSM4567_REG_POWER_CTRL, 0x81 }, { SSM4567_REG_AMP_SNS_CTRL, 0x09 }, { SSM4567_REG_DAC_CTRL, 0x32 }, { SSM4567_REG_DAC_VOLUME, 0x40 }, { SSM4567_REG_SAI_CTRL_1, 0x00 }, { SSM4567_REG_SAI_CTRL_2, 0x08 }, { SSM4567_REG_SAI_PLACEMENT_1, 0x01 }, { SSM4567_REG_SAI_PLACEMENT_2, 0x20 }, { SSM4567_REG_SAI_PLACEMENT_3, 0x32 }, { SSM4567_REG_SAI_PLACEMENT_4, 0x07 }, { SSM4567_REG_SAI_PLACEMENT_5, 0x07 }, { SSM4567_REG_SAI_PLACEMENT_6, 0x07 }, { SSM4567_REG_BATTERY_V_OUT, 0x00 }, { SSM4567_REG_LIMITER_CTRL_1, 0xa4 }, { SSM4567_REG_LIMITER_CTRL_2, 0x73 }, { SSM4567_REG_LIMITER_CTRL_3, 0x00 }, { SSM4567_REG_STATUS_1, 0x00 }, { SSM4567_REG_STATUS_2, 0x00 }, { SSM4567_REG_FAULT_CTRL, 0x30 }, { SSM4567_REG_PDM_CTRL, 0x40 }, { SSM4567_REG_MCLK_RATIO, 0x11 }, { SSM4567_REG_BOOST_CTRL_1, 0x03 }, { SSM4567_REG_BOOST_CTRL_2, 0x00 }, { SSM4567_REG_SOFT_RESET, 0x00 }, }; static bool ssm4567_readable_reg(struct device *dev, unsigned int reg) { switch (reg) { case SSM4567_REG_POWER_CTRL ... SSM4567_REG_BOOST_CTRL_2: return true; default: return false; } } static bool ssm4567_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { case SSM4567_REG_POWER_CTRL ... SSM4567_REG_SAI_PLACEMENT_6: case SSM4567_REG_LIMITER_CTRL_1 ... SSM4567_REG_LIMITER_CTRL_3: case SSM4567_REG_FAULT_CTRL ... SSM4567_REG_BOOST_CTRL_2: /* The datasheet states that soft reset register is read-only, * but logically it is write-only. */ case SSM4567_REG_SOFT_RESET: return true; default: return false; } } static bool ssm4567_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case SSM4567_REG_BATTERY_V_OUT: case SSM4567_REG_STATUS_1 ... SSM4567_REG_STATUS_2: case SSM4567_REG_SOFT_RESET: return true; default: return false; } } static const DECLARE_TLV_DB_MINMAX_MUTE(ssm4567_vol_tlv, -7125, 2400); static const struct snd_kcontrol_new ssm4567_snd_controls[] = { SOC_SINGLE_TLV("Master Playback Volume", SSM4567_REG_DAC_VOLUME, 0, 0xff, 1, ssm4567_vol_tlv), SOC_SINGLE("DAC Low Power Mode Switch", SSM4567_REG_DAC_CTRL, 4, 1, 0), SOC_SINGLE("DAC High Pass Filter Switch", SSM4567_REG_DAC_CTRL, 5, 1, 0), }; static const struct snd_kcontrol_new ssm4567_amplifier_boost_control = SOC_DAPM_SINGLE("Switch", SSM4567_REG_POWER_CTRL, 1, 1, 1); static const struct snd_soc_dapm_widget ssm4567_dapm_widgets[] = { SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM4567_REG_POWER_CTRL, 2, 1), SND_SOC_DAPM_SWITCH("Amplifier Boost", SSM4567_REG_POWER_CTRL, 3, 1, &ssm4567_amplifier_boost_control), SND_SOC_DAPM_SIGGEN("Sense"), SND_SOC_DAPM_PGA("Current Sense", SSM4567_REG_POWER_CTRL, 4, 1, NULL, 0), SND_SOC_DAPM_PGA("Voltage Sense", SSM4567_REG_POWER_CTRL, 5, 1, NULL, 0), SND_SOC_DAPM_PGA("VBAT Sense", SSM4567_REG_POWER_CTRL, 6, 1, NULL, 0), SND_SOC_DAPM_OUTPUT("OUT"), }; static const struct snd_soc_dapm_route ssm4567_routes[] = { { "OUT", NULL, "Amplifier Boost" }, { "Amplifier Boost", "Switch", "DAC" }, { "OUT", NULL, "DAC" }, { "Current Sense", NULL, "Sense" }, { "Voltage Sense", NULL, "Sense" }, { "VBAT Sense", NULL, "Sense" }, { "Capture Sense", NULL, "Current Sense" }, { "Capture Sense", NULL, "Voltage Sense" }, { "Capture Sense", NULL, "VBAT Sense" }, }; static int ssm4567_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 ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec); unsigned int rate = params_rate(params); unsigned int dacfs; if (rate >= 8000 && rate <= 12000) dacfs = SSM4567_DAC_FS_8000_12000; else if (rate >= 16000 && rate <= 24000) dacfs = SSM4567_DAC_FS_16000_24000; else if (rate >= 32000 && rate <= 48000) dacfs = SSM4567_DAC_FS_32000_48000; else if (rate >= 64000 && rate <= 96000) dacfs = SSM4567_DAC_FS_64000_96000; else if (rate >= 128000 && rate <= 192000) dacfs = SSM4567_DAC_FS_128000_192000; else return -EINVAL; return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL, SSM4567_DAC_FS_MASK, dacfs); } static int ssm4567_mute(struct snd_soc_dai *dai, int mute) { struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(dai->codec); unsigned int val; val = mute ? SSM4567_DAC_MUTE : 0; return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL, SSM4567_DAC_MUTE, val); } static int ssm4567_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, unsigned int rx_mask, int slots, int width) { struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai); unsigned int blcks; int slot; int ret; if (tx_mask == 0) return -EINVAL; if (rx_mask && rx_mask != tx_mask) return -EINVAL; slot = __ffs(tx_mask); if (tx_mask != BIT(slot)) return -EINVAL; switch (width) { case 32: blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_32; break; case 48: blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_48; break; case 64: blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_64; break; default: return -EINVAL; } ret = regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_2, SSM4567_SAI_CTRL_2_AUTO_SLOT | SSM4567_SAI_CTRL_2_TDM_SLOT_MASK, SSM4567_SAI_CTRL_2_TDM_SLOT(slot)); if (ret) return ret; return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1, SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK, blcks); } static int ssm4567_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai); unsigned int ctrl1 = 0; bool invert_fclk; switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: invert_fclk = false; break; case SND_SOC_DAIFMT_IB_NF: ctrl1 |= SSM4567_SAI_CTRL_1_BCLK; invert_fclk = false; break; case SND_SOC_DAIFMT_NB_IF: ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC; invert_fclk = true; break; case SND_SOC_DAIFMT_IB_IF: ctrl1 |= SSM4567_SAI_CTRL_1_BCLK; invert_fclk = true; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: break; case SND_SOC_DAIFMT_LEFT_J: ctrl1 |= SSM4567_SAI_CTRL_1_LJ; invert_fclk = !invert_fclk; break; case SND_SOC_DAIFMT_DSP_A: ctrl1 |= SSM4567_SAI_CTRL_1_TDM; break; case SND_SOC_DAIFMT_DSP_B: ctrl1 |= SSM4567_SAI_CTRL_1_TDM | SSM4567_SAI_CTRL_1_LJ; break; case SND_SOC_DAIFMT_PDM: ctrl1 |= SSM4567_SAI_CTRL_1_PDM; break; default: return -EINVAL; } if (invert_fclk) ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC; return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1, SSM4567_SAI_CTRL_1_BCLK | SSM4567_SAI_CTRL_1_FSYNC | SSM4567_SAI_CTRL_1_LJ | SSM4567_SAI_CTRL_1_TDM | SSM4567_SAI_CTRL_1_PDM, ctrl1); } static int ssm4567_set_power(struct ssm4567 *ssm4567, bool enable) { int ret = 0; if (!enable) { ret = regmap_update_bits(ssm4567->regmap, SSM4567_REG_POWER_CTRL, SSM4567_POWER_SPWDN, SSM4567_POWER_SPWDN); regcache_mark_dirty(ssm4567->regmap); } regcache_cache_only(ssm4567->regmap, !enable); if (enable) { ret = regmap_update_bits(ssm4567->regmap, SSM4567_REG_POWER_CTRL, SSM4567_POWER_SPWDN, 0x00); regcache_sync(ssm4567->regmap); } return ret; } static int ssm4567_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec); int ret = 0; switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) ret = ssm4567_set_power(ssm4567, true); break; case SND_SOC_BIAS_OFF: ret = ssm4567_set_power(ssm4567, false); break; } return ret; } static const struct snd_soc_dai_ops ssm4567_dai_ops = { .hw_params = ssm4567_hw_params, .digital_mute = ssm4567_mute, .set_fmt = ssm4567_set_dai_fmt, .set_tdm_slot = ssm4567_set_tdm_slot, }; static struct snd_soc_dai_driver ssm4567_dai = { .name = "ssm4567-hifi", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 1, .rates = SNDRV_PCM_RATE_8000_192000, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32, }, .capture = { .stream_name = "Capture Sense", .channels_min = 1, .channels_max = 1, .rates = SNDRV_PCM_RATE_8000_192000, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32, }, .ops = &ssm4567_dai_ops, }; static struct snd_soc_codec_driver ssm4567_codec_driver = { .set_bias_level = ssm4567_set_bias_level, .idle_bias_off = true, .controls = ssm4567_snd_controls, .num_controls = ARRAY_SIZE(ssm4567_snd_controls), .dapm_widgets = ssm4567_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(ssm4567_dapm_widgets), .dapm_routes = ssm4567_routes, .num_dapm_routes = ARRAY_SIZE(ssm4567_routes), }; static const struct regmap_config ssm4567_regmap_config = { .val_bits = 8, .reg_bits = 8, .max_register = SSM4567_REG_SOFT_RESET, .readable_reg = ssm4567_readable_reg, .writeable_reg = ssm4567_writeable_reg, .volatile_reg = ssm4567_volatile_reg, .cache_type = REGCACHE_RBTREE, .reg_defaults = ssm4567_reg_defaults, .num_reg_defaults = ARRAY_SIZE(ssm4567_reg_defaults), }; static int ssm4567_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct ssm4567 *ssm4567; int ret; ssm4567 = devm_kzalloc(&i2c->dev, sizeof(*ssm4567), GFP_KERNEL); if (ssm4567 == NULL) return -ENOMEM; i2c_set_clientdata(i2c, ssm4567); ssm4567->regmap = devm_regmap_init_i2c(i2c, &ssm4567_regmap_config); if (IS_ERR(ssm4567->regmap)) return PTR_ERR(ssm4567->regmap); ret = regmap_write(ssm4567->regmap, SSM4567_REG_SOFT_RESET, 0x00); if (ret) return ret; ret = ssm4567_set_power(ssm4567, false); if (ret) return ret; return snd_soc_register_codec(&i2c->dev, &ssm4567_codec_driver, &ssm4567_dai, 1); } static int ssm4567_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; } static const struct i2c_device_id ssm4567_i2c_ids[] = { { "ssm4567", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, ssm4567_i2c_ids); #ifdef CONFIG_ACPI static const struct acpi_device_id ssm4567_acpi_match[] = { { "INT343B", 0 }, {}, }; MODULE_DEVICE_TABLE(acpi, ssm4567_acpi_match); #endif static struct i2c_driver ssm4567_driver = { .driver = { .name = "ssm4567", .acpi_match_table = ACPI_PTR(ssm4567_acpi_match), }, .probe = ssm4567_i2c_probe, .remove = ssm4567_i2c_remove, .id_table = ssm4567_i2c_ids, }; module_i2c_driver(ssm4567_driver); MODULE_DESCRIPTION("ASoC SSM4567 driver"); MODULE_AUTHOR("Anatol Pomozov <anatol@chromium.org>"); MODULE_LICENSE("GPL");