diff options
Diffstat (limited to 'sound/soc/codecs/wm8741.c')
| -rw-r--r-- | sound/soc/codecs/wm8741.c | 708 |
1 files changed, 708 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8741.c b/sound/soc/codecs/wm8741.c new file mode 100644 index 000000000..c7afa4f27 --- /dev/null +++ b/sound/soc/codecs/wm8741.c @@ -0,0 +1,708 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * wm8741.c -- WM8741 ALSA SoC Audio driver + * + * Copyright 2010-1 Wolfson Microelectronics plc + * + * Author: Ian Lartey <ian@opensource.wolfsonmicro.com> + */ + +#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, mode; + 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; + } + + /* oversampling rate */ + if (params_rate(params) > 96000) + mode = 0x40; + else if (params_rate(params) > 48000) + mode = 0x20; + else + mode = 0x00; + + 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); + snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK, + mode); + + 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; +} + +static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute, int direction) +{ + struct snd_soc_component *component = codec_dai->component; + + snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL, + WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT); + 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, + .mute_stream = wm8741_mute, + .no_capture_mute = 1, +}; + +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, +}; + +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) +{ + 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_new = 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"); |