/* * wm8741.c -- WM8741 ALSA SoC Audio driver * * Copyright 2010-1 Wolfson Microelectronics plc * * Author: Ian Lartey <ian@opensource.wolfsonmicro.com> * * * 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 <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/spi/spi.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/of_device.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> #include "wm8741.h" #define WM8741_NUM_SUPPLIES 2 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = { "AVDD", "DVDD", }; /* codec private data */ struct wm8741_priv { struct wm8741_platform_data pdata; struct regmap *regmap; struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES]; unsigned int sysclk; const struct snd_pcm_hw_constraint_list *sysclk_constraints; }; static const struct reg_default wm8741_reg_defaults[] = { { 0, 0x0000 }, /* R0 - DACLLSB Attenuation */ { 1, 0x0000 }, /* R1 - DACLMSB Attenuation */ { 2, 0x0000 }, /* R2 - DACRLSB Attenuation */ { 3, 0x0000 }, /* R3 - DACRMSB Attenuation */ { 4, 0x0000 }, /* R4 - Volume Control */ { 5, 0x000A }, /* R5 - Format Control */ { 6, 0x0000 }, /* R6 - Filter Control */ { 7, 0x0000 }, /* R7 - Mode Control 1 */ { 8, 0x0002 }, /* R8 - Mode Control 2 */ { 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */ }; static int wm8741_reset(struct snd_soc_component *component) { return snd_soc_component_write(component, WM8741_RESET, 0); } static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0); static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0); static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = { SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine), SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv), }; static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = { SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine), SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, 0, 511, 1, dac_tlv), }; static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = { SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine), SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv), }; static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = { SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_OUTPUT("VOUTLP"), SND_SOC_DAPM_OUTPUT("VOUTLN"), SND_SOC_DAPM_OUTPUT("VOUTRP"), SND_SOC_DAPM_OUTPUT("VOUTRN"), }; static const struct snd_soc_dapm_route wm8741_dapm_routes[] = { { "VOUTLP", NULL, "DACL" }, { "VOUTLN", NULL, "DACL" }, { "VOUTRP", NULL, "DACR" }, { "VOUTRN", NULL, "DACR" }, }; static const unsigned int rates_11289[] = { 44100, 88200, }; static const struct snd_pcm_hw_constraint_list constraints_11289 = { .count = ARRAY_SIZE(rates_11289), .list = rates_11289, }; static const unsigned int rates_12288[] = { 32000, 48000, 96000, }; static const struct snd_pcm_hw_constraint_list constraints_12288 = { .count = ARRAY_SIZE(rates_12288), .list = rates_12288, }; static const unsigned int rates_16384[] = { 32000, }; static const struct snd_pcm_hw_constraint_list constraints_16384 = { .count = ARRAY_SIZE(rates_16384), .list = rates_16384, }; static const unsigned int rates_16934[] = { 44100, 88200, }; static const struct snd_pcm_hw_constraint_list constraints_16934 = { .count = ARRAY_SIZE(rates_16934), .list = rates_16934, }; static const unsigned int rates_18432[] = { 48000, 96000, }; static const struct snd_pcm_hw_constraint_list constraints_18432 = { .count = ARRAY_SIZE(rates_18432), .list = rates_18432, }; static const unsigned int rates_22579[] = { 44100, 88200, 176400 }; static const struct snd_pcm_hw_constraint_list constraints_22579 = { .count = ARRAY_SIZE(rates_22579), .list = rates_22579, }; static const unsigned int rates_24576[] = { 32000, 48000, 96000, 192000 }; static const struct snd_pcm_hw_constraint_list constraints_24576 = { .count = ARRAY_SIZE(rates_24576), .list = rates_24576, }; static const unsigned int rates_36864[] = { 48000, 96000, 192000 }; static const struct snd_pcm_hw_constraint_list constraints_36864 = { .count = ARRAY_SIZE(rates_36864), .list = rates_36864, }; static int wm8741_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_component *component = dai->component; struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); if (wm8741->sysclk) snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_RATE, wm8741->sysclk_constraints); return 0; } static int wm8741_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 wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); unsigned int iface; int i; /* The set of sample rates that can be supported depends on the * MCLK supplied to the CODEC - enforce this. */ if (!wm8741->sysclk) { dev_err(component->dev, "No MCLK configured, call set_sysclk() on init or in hw_params\n"); return -EINVAL; } /* Find a supported LRCLK rate */ for (i = 0; i < wm8741->sysclk_constraints->count; i++) { if (wm8741->sysclk_constraints->list[i] == params_rate(params)) break; } if (i == wm8741->sysclk_constraints->count) { dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n", params_rate(params), wm8741->sysclk); return -EINVAL; } /* bit size */ switch (params_width(params)) { case 16: iface = 0x0; break; case 20: iface = 0x1; break; case 24: iface = 0x2; break; case 32: iface = 0x3; break; default: dev_dbg(component->dev, "wm8741_hw_params: Unsupported bit size param = %d", params_width(params)); return -EINVAL; } dev_dbg(component->dev, "wm8741_hw_params: bit size param = %d, rate param = %d", params_width(params), params_rate(params)); snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK, iface); return 0; } static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_component *component = codec_dai->component; struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq); switch (freq) { case 0: wm8741->sysclk_constraints = NULL; break; case 11289600: wm8741->sysclk_constraints = &constraints_11289; break; case 12288000: wm8741->sysclk_constraints = &constraints_12288; break; case 16384000: wm8741->sysclk_constraints = &constraints_16384; break; case 16934400: wm8741->sysclk_constraints = &constraints_16934; break; case 18432000: wm8741->sysclk_constraints = &constraints_18432; break; case 22579200: case 33868800: wm8741->sysclk_constraints = &constraints_22579; break; case 24576000: wm8741->sysclk_constraints = &constraints_24576; break; case 36864000: wm8741->sysclk_constraints = &constraints_36864; break; default: return -EINVAL; } wm8741->sysclk = freq; return 0; } static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_component *component = codec_dai->component; unsigned int iface; /* check master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: iface = 0x08; break; case SND_SOC_DAIFMT_RIGHT_J: iface = 0x00; break; case SND_SOC_DAIFMT_LEFT_J: iface = 0x04; break; case SND_SOC_DAIFMT_DSP_A: iface = 0x0C; break; case SND_SOC_DAIFMT_DSP_B: iface = 0x1C; break; default: return -EINVAL; } /* clock inversion */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x10; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x20; break; case SND_SOC_DAIFMT_IB_IF: iface |= 0x30; break; default: return -EINVAL; } dev_dbg(component->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n", fmt & SND_SOC_DAIFMT_FORMAT_MASK, ((fmt & SND_SOC_DAIFMT_INV_MASK))); snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK, iface); return 0; } #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \ SNDRV_PCM_RATE_192000) #define WM8741_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 wm8741_dai_ops = { .startup = wm8741_startup, .hw_params = wm8741_hw_params, .set_sysclk = wm8741_set_dai_sysclk, .set_fmt = wm8741_set_dai_fmt, }; static struct snd_soc_dai_driver wm8741_dai = { .name = "wm8741", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = WM8741_RATES, .formats = WM8741_FORMATS, }, .ops = &wm8741_dai_ops, }; #ifdef CONFIG_PM static int wm8741_resume(struct snd_soc_component *component) { snd_soc_component_cache_sync(component); return 0; } #else #define wm8741_resume NULL #endif static int wm8741_configure(struct snd_soc_component *component) { struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); /* Configure differential mode */ switch (wm8741->pdata.diff_mode) { case WM8741_DIFF_MODE_STEREO: case WM8741_DIFF_MODE_STEREO_REVERSED: case WM8741_DIFF_MODE_MONO_LEFT: case WM8741_DIFF_MODE_MONO_RIGHT: snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2, WM8741_DIFF_MASK, wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT); break; default: return -EINVAL; } /* Change some default settings - latch VU */ snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION, WM8741_UPDATELL, WM8741_UPDATELL); snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION, WM8741_UPDATELM, WM8741_UPDATELM); snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION, WM8741_UPDATERL, WM8741_UPDATERL); snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION, WM8741_UPDATERM, WM8741_UPDATERM); return 0; } static int wm8741_add_controls(struct snd_soc_component *component) { struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); switch (wm8741->pdata.diff_mode) { case WM8741_DIFF_MODE_STEREO: case WM8741_DIFF_MODE_STEREO_REVERSED: snd_soc_add_component_controls(component, wm8741_snd_controls_stereo, ARRAY_SIZE(wm8741_snd_controls_stereo)); break; case WM8741_DIFF_MODE_MONO_LEFT: snd_soc_add_component_controls(component, wm8741_snd_controls_mono_left, ARRAY_SIZE(wm8741_snd_controls_mono_left)); break; case WM8741_DIFF_MODE_MONO_RIGHT: snd_soc_add_component_controls(component, wm8741_snd_controls_mono_right, ARRAY_SIZE(wm8741_snd_controls_mono_right)); break; default: return -EINVAL; } return 0; } static int wm8741_probe(struct snd_soc_component *component) { struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); int ret = 0; ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); if (ret != 0) { dev_err(component->dev, "Failed to enable supplies: %d\n", ret); goto err_get; } ret = wm8741_reset(component); if (ret < 0) { dev_err(component->dev, "Failed to issue reset\n"); goto err_enable; } ret = wm8741_configure(component); if (ret < 0) { dev_err(component->dev, "Failed to change default settings\n"); goto err_enable; } ret = wm8741_add_controls(component); if (ret < 0) { dev_err(component->dev, "Failed to add controls\n"); goto err_enable; } dev_dbg(component->dev, "Successful registration\n"); return ret; err_enable: regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); err_get: return ret; } static void wm8741_remove(struct snd_soc_component *component) { struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component); regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); } static const struct snd_soc_component_driver soc_component_dev_wm8741 = { .probe = wm8741_probe, .remove = wm8741_remove, .resume = wm8741_resume, .dapm_widgets = wm8741_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets), .dapm_routes = wm8741_dapm_routes, .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes), .idle_bias_on = 1, .use_pmdown_time = 1, .endianness = 1, .non_legacy_dai_naming = 1, }; static const struct of_device_id wm8741_of_match[] = { { .compatible = "wlf,wm8741", }, { } }; MODULE_DEVICE_TABLE(of, wm8741_of_match); static const struct regmap_config wm8741_regmap = { .reg_bits = 7, .val_bits = 9, .max_register = WM8741_MAX_REGISTER, .reg_defaults = wm8741_reg_defaults, .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults), .cache_type = REGCACHE_RBTREE, }; static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741) { const struct wm8741_platform_data *pdata = dev_get_platdata(dev); u32 diff_mode; if (dev->of_node) { if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode) >= 0) wm8741->pdata.diff_mode = diff_mode; } else { if (pdata != NULL) memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata)); } return 0; } #if IS_ENABLED(CONFIG_I2C) static int wm8741_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8741_priv *wm8741; int ret, i; wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv), GFP_KERNEL); if (wm8741 == NULL) return -ENOMEM; for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) wm8741->supplies[i].supply = wm8741_supply_names[i]; ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies), wm8741->supplies); if (ret != 0) { dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret); return ret; } wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap); if (IS_ERR(wm8741->regmap)) { ret = PTR_ERR(wm8741->regmap); dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret); return ret; } ret = wm8741_set_pdata(&i2c->dev, wm8741); if (ret != 0) { dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret); return ret; } i2c_set_clientdata(i2c, wm8741); ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_wm8741, &wm8741_dai, 1); return ret; } static const struct i2c_device_id wm8741_i2c_id[] = { { "wm8741", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id); static struct i2c_driver wm8741_i2c_driver = { .driver = { .name = "wm8741", .of_match_table = wm8741_of_match, }, .probe = wm8741_i2c_probe, .id_table = wm8741_i2c_id, }; #endif #if defined(CONFIG_SPI_MASTER) static int wm8741_spi_probe(struct spi_device *spi) { struct wm8741_priv *wm8741; int ret, i; wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv), GFP_KERNEL); if (wm8741 == NULL) return -ENOMEM; for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) wm8741->supplies[i].supply = wm8741_supply_names[i]; ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies), wm8741->supplies); if (ret != 0) { dev_err(&spi->dev, "Failed to request supplies: %d\n", ret); return ret; } wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap); if (IS_ERR(wm8741->regmap)) { ret = PTR_ERR(wm8741->regmap); dev_err(&spi->dev, "Failed to init regmap: %d\n", ret); return ret; } ret = wm8741_set_pdata(&spi->dev, wm8741); if (ret != 0) { dev_err(&spi->dev, "Failed to set pdata: %d\n", ret); return ret; } spi_set_drvdata(spi, wm8741); ret = devm_snd_soc_register_component(&spi->dev, &soc_component_dev_wm8741, &wm8741_dai, 1); return ret; } static struct spi_driver wm8741_spi_driver = { .driver = { .name = "wm8741", .of_match_table = wm8741_of_match, }, .probe = wm8741_spi_probe, }; #endif /* CONFIG_SPI_MASTER */ static int __init wm8741_modinit(void) { int ret = 0; #if IS_ENABLED(CONFIG_I2C) ret = i2c_add_driver(&wm8741_i2c_driver); if (ret != 0) pr_err("Failed to register WM8741 I2C driver: %d\n", ret); #endif #if defined(CONFIG_SPI_MASTER) ret = spi_register_driver(&wm8741_spi_driver); if (ret != 0) { printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n", ret); } #endif return ret; } module_init(wm8741_modinit); static void __exit wm8741_exit(void) { #if defined(CONFIG_SPI_MASTER) spi_unregister_driver(&wm8741_spi_driver); #endif #if IS_ENABLED(CONFIG_I2C) i2c_del_driver(&wm8741_i2c_driver); #endif } module_exit(wm8741_exit); MODULE_DESCRIPTION("ASoC WM8741 driver"); MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>"); MODULE_LICENSE("GPL");