/* * wm8523.c -- WM8523 ALSA SoC Audio driver * * Copyright 2009 Wolfson Microelectronics plc * * Author: Mark Brown * * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8523.h" #define WM8523_NUM_SUPPLIES 2 static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = { "AVDD", "LINEVDD", }; #define WM8523_NUM_RATES 7 /* codec private data */ struct wm8523_priv { struct regmap *regmap; struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES]; unsigned int sysclk; unsigned int rate_constraint_list[WM8523_NUM_RATES]; struct snd_pcm_hw_constraint_list rate_constraint; }; static const struct reg_default wm8523_reg_defaults[] = { { 2, 0x0000 }, /* R2 - PSCTRL1 */ { 3, 0x1812 }, /* R3 - AIF_CTRL1 */ { 4, 0x0000 }, /* R4 - AIF_CTRL2 */ { 5, 0x0001 }, /* R5 - DAC_CTRL3 */ { 6, 0x0190 }, /* R6 - DAC_GAINL */ { 7, 0x0190 }, /* R7 - DAC_GAINR */ { 8, 0x0000 }, /* R8 - ZERO_DETECT */ }; static bool wm8523_volatile_register(struct device *dev, unsigned int reg) { switch (reg) { case WM8523_DEVICE_ID: case WM8523_REVISION: return true; default: return false; } } static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0); static const char *wm8523_zd_count_text[] = { "1024", "2048", }; static SOC_ENUM_SINGLE_DECL(wm8523_zc_count, WM8523_ZERO_DETECT, 0, wm8523_zd_count_text); static const struct snd_kcontrol_new wm8523_controls[] = { SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR, 0, 448, 0, dac_tlv), SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0), SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0), SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1), SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0), SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0), SOC_ENUM("Zero Detect Count", wm8523_zc_count), }; static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = { SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_OUTPUT("LINEVOUTL"), SND_SOC_DAPM_OUTPUT("LINEVOUTR"), }; static const struct snd_soc_dapm_route wm8523_dapm_routes[] = { { "LINEVOUTL", NULL, "DAC" }, { "LINEVOUTR", NULL, "DAC" }, }; static struct { int value; int ratio; } lrclk_ratios[WM8523_NUM_RATES] = { { 1, 128 }, { 2, 192 }, { 3, 256 }, { 4, 384 }, { 5, 512 }, { 6, 768 }, { 7, 1152 }, }; static int wm8523_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); /* The set of sample rates that can be supported depends on the * MCLK supplied to the CODEC - enforce this. */ if (!wm8523->sysclk) { dev_err(codec->dev, "No MCLK configured, call set_sysclk() on init\n"); return -EINVAL; } snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &wm8523->rate_constraint); return 0; } static int wm8523_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 wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); int i; u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2); /* Find a supported LRCLK ratio */ for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { if (wm8523->sysclk / params_rate(params) == lrclk_ratios[i].ratio) break; } /* Should never happen, should be handled by constraints */ if (i == ARRAY_SIZE(lrclk_ratios)) { dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", wm8523->sysclk / params_rate(params)); return -EINVAL; } aifctrl2 &= ~WM8523_SR_MASK; aifctrl2 |= lrclk_ratios[i].value; aifctrl1 &= ~WM8523_WL_MASK; switch (params_width(params)) { case 16: break; case 20: aifctrl1 |= 0x8; break; case 24: aifctrl1 |= 0x10; break; case 32: aifctrl1 |= 0x18; break; } snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2); return 0; } static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = codec_dai->codec; struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); unsigned int val; int i; wm8523->sysclk = freq; wm8523->rate_constraint.count = 0; for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { val = freq / lrclk_ratios[i].ratio; /* Check that it's a standard rate since core can't * cope with others and having the odd rates confuses * constraint matching. */ switch (val) { case 8000: case 11025: case 16000: case 22050: case 32000: case 44100: case 48000: case 64000: case 88200: case 96000: case 176400: case 192000: dev_dbg(codec->dev, "Supported sample rate: %dHz\n", val); wm8523->rate_constraint_list[i] = val; wm8523->rate_constraint.count++; break; default: dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", val); } } /* Need at least one supported rate... */ if (wm8523->rate_constraint.count == 0) return -EINVAL; return 0; } static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK | WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK); switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: aifctrl1 |= WM8523_AIF_MSTR; break; case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: aifctrl1 |= 0x0002; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: aifctrl1 |= 0x0001; break; case SND_SOC_DAIFMT_DSP_A: aifctrl1 |= 0x0003; break; case SND_SOC_DAIFMT_DSP_B: aifctrl1 |= 0x0023; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_IF: aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV; break; case SND_SOC_DAIFMT_IB_NF: aifctrl1 |= WM8523_BCLK_INV; break; case SND_SOC_DAIFMT_NB_IF: aifctrl1 |= WM8523_LRCLK_INV; break; default: return -EINVAL; } snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); return 0; } static int wm8523_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); int ret; switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: /* Full power on */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 3); break; case SND_SOC_BIAS_STANDBY: if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); return ret; } /* Sync back default/cached values */ regcache_sync(wm8523->regmap); /* Initial power up */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 1); msleep(100); } /* Power up to mute */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 2); break; case SND_SOC_BIAS_OFF: /* The chip runs through the power down sequence for us. */ snd_soc_update_bits(codec, WM8523_PSCTRL1, WM8523_SYS_ENA_MASK, 0); msleep(100); regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); break; } return 0; } #define WM8523_RATES SNDRV_PCM_RATE_8000_192000 #define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) static const struct snd_soc_dai_ops wm8523_dai_ops = { .startup = wm8523_startup, .hw_params = wm8523_hw_params, .set_sysclk = wm8523_set_dai_sysclk, .set_fmt = wm8523_set_dai_fmt, }; static struct snd_soc_dai_driver wm8523_dai = { .name = "wm8523-hifi", .playback = { .stream_name = "Playback", .channels_min = 2, /* Mono modes not yet supported */ .channels_max = 2, .rates = WM8523_RATES, .formats = WM8523_FORMATS, }, .ops = &wm8523_dai_ops, }; static int wm8523_probe(struct snd_soc_codec *codec) { struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0]; wm8523->rate_constraint.count = ARRAY_SIZE(wm8523->rate_constraint_list); /* Change some default settings - latch VU and enable ZC */ snd_soc_update_bits(codec, WM8523_DAC_GAINR, WM8523_DACR_VU, WM8523_DACR_VU); snd_soc_update_bits(codec, WM8523_DAC_CTRL3, WM8523_ZC, WM8523_ZC); return 0; } static struct snd_soc_codec_driver soc_codec_dev_wm8523 = { .probe = wm8523_probe, .set_bias_level = wm8523_set_bias_level, .suspend_bias_off = true, .controls = wm8523_controls, .num_controls = ARRAY_SIZE(wm8523_controls), .dapm_widgets = wm8523_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(wm8523_dapm_widgets), .dapm_routes = wm8523_dapm_routes, .num_dapm_routes = ARRAY_SIZE(wm8523_dapm_routes), }; static const struct of_device_id wm8523_of_match[] = { { .compatible = "wlf,wm8523" }, { }, }; static const struct regmap_config wm8523_regmap = { .reg_bits = 8, .val_bits = 16, .max_register = WM8523_ZERO_DETECT, .reg_defaults = wm8523_reg_defaults, .num_reg_defaults = ARRAY_SIZE(wm8523_reg_defaults), .cache_type = REGCACHE_RBTREE, .volatile_reg = wm8523_volatile_register, }; #if IS_ENABLED(CONFIG_I2C) static int wm8523_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8523_priv *wm8523; unsigned int val; int ret, i; wm8523 = devm_kzalloc(&i2c->dev, sizeof(struct wm8523_priv), GFP_KERNEL); if (wm8523 == NULL) return -ENOMEM; wm8523->regmap = devm_regmap_init_i2c(i2c, &wm8523_regmap); if (IS_ERR(wm8523->regmap)) { ret = PTR_ERR(wm8523->regmap); dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret); return ret; } for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++) wm8523->supplies[i].supply = wm8523_supply_names[i]; ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8523->supplies), wm8523->supplies); if (ret != 0) { dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret); return ret; } ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); if (ret != 0) { dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret); return ret; } ret = regmap_read(wm8523->regmap, WM8523_DEVICE_ID, &val); if (ret < 0) { dev_err(&i2c->dev, "Failed to read ID register\n"); goto err_enable; } if (val != 0x8523) { dev_err(&i2c->dev, "Device is not a WM8523, ID is %x\n", ret); ret = -EINVAL; goto err_enable; } ret = regmap_read(wm8523->regmap, WM8523_REVISION, &val); if (ret < 0) { dev_err(&i2c->dev, "Failed to read revision register\n"); goto err_enable; } dev_info(&i2c->dev, "revision %c\n", (val & WM8523_CHIP_REV_MASK) + 'A'); ret = regmap_write(wm8523->regmap, WM8523_DEVICE_ID, 0x8523); if (ret != 0) { dev_err(&i2c->dev, "Failed to reset device: %d\n", ret); goto err_enable; } regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); i2c_set_clientdata(i2c, wm8523); ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8523, &wm8523_dai, 1); return ret; err_enable: regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); return ret; } static int wm8523_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; } static const struct i2c_device_id wm8523_i2c_id[] = { { "wm8523", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id); static struct i2c_driver wm8523_i2c_driver = { .driver = { .name = "wm8523", .owner = THIS_MODULE, .of_match_table = wm8523_of_match, }, .probe = wm8523_i2c_probe, .remove = wm8523_i2c_remove, .id_table = wm8523_i2c_id, }; #endif static int __init wm8523_modinit(void) { int ret; #if IS_ENABLED(CONFIG_I2C) ret = i2c_add_driver(&wm8523_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n", ret); } #endif return 0; } module_init(wm8523_modinit); static void __exit wm8523_exit(void) { #if IS_ENABLED(CONFIG_I2C) i2c_del_driver(&wm8523_i2c_driver); #endif } module_exit(wm8523_exit); MODULE_DESCRIPTION("ASoC WM8523 driver"); MODULE_AUTHOR("Mark Brown "); MODULE_LICENSE("GPL");