diff options
Diffstat (limited to 'sound/soc/codecs/wm8523.c')
| -rw-r--r-- | sound/soc/codecs/wm8523.c | 699 |
1 files changed, 699 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8523.c b/sound/soc/codecs/wm8523.c new file mode 100644 index 000000000000..25870a4652fb --- /dev/null +++ b/sound/soc/codecs/wm8523.c @@ -0,0 +1,699 @@ +/* + * wm8523.c -- WM8523 ALSA SoC Audio driver + * + * Copyright 2009 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@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/platform_device.h> +#include <linux/regulator/consumer.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> +#include <sound/tlv.h> + +#include "wm8523.h" + +static struct snd_soc_codec *wm8523_codec; +struct snd_soc_codec_device soc_codec_dev_wm8523; + +#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 snd_soc_codec codec; + u16 reg_cache[WM8523_REGISTER_COUNT]; + 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 u16 wm8523_reg[WM8523_REGISTER_COUNT] = { + 0x8523, /* R0 - DEVICE_ID */ + 0x0001, /* R1 - REVISION */ + 0x0000, /* R2 - PSCTRL1 */ + 0x1812, /* R3 - AIF_CTRL1 */ + 0x0000, /* R4 - AIF_CTRL2 */ + 0x0001, /* R5 - DAC_CTRL3 */ + 0x0190, /* R6 - DAC_GAINL */ + 0x0190, /* R7 - DAC_GAINR */ + 0x0000, /* R8 - ZERO_DETECT */ +}; + +static int wm8523_volatile_register(unsigned int reg) +{ + switch (reg) { + case WM8523_DEVICE_ID: + case WM8523_REVISION: + return 1; + default: + return 0; + } +} + +static int wm8523_reset(struct snd_soc_codec *codec) +{ + return snd_soc_write(codec, WM8523_DEVICE_ID, 0); +} + +static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0); + +static const char *wm8523_zd_count_text[] = { + "1024", + "2048", +}; + +static const struct soc_enum wm8523_zc_count = + SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text); + +static const struct snd_kcontrol_new wm8523_snd_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 intercon[] = { + { "LINEVOUTL", NULL, "DAC" }, + { "LINEVOUTR", NULL, "DAC" }, +}; + +static int wm8523_add_widgets(struct snd_soc_codec *codec) +{ + snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets, + ARRAY_SIZE(wm8523_dapm_widgets)); + + snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); + + snd_soc_dapm_new_widgets(codec); + return 0; +} + +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 = codec->private_data; + + /* 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; + } + + return 0; + 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_pcm_runtime *rtd = substream->private_data; + struct snd_soc_device *socdev = rtd->socdev; + struct snd_soc_codec *codec = socdev->card->codec; + struct wm8523_priv *wm8523 = codec->private_data; + 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_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + break; + case SNDRV_PCM_FORMAT_S20_3LE: + aifctrl1 |= 0x8; + break; + case SNDRV_PCM_FORMAT_S24_LE: + aifctrl1 |= 0x10; + break; + case SNDRV_PCM_FORMAT_S32_LE: + 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 = codec->private_data; + 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 = codec->private_data; + int ret, i; + + 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->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; + } + + /* Initial power up */ + snd_soc_update_bits(codec, WM8523_PSCTRL1, + WM8523_SYS_ENA_MASK, 1); + + /* Sync back default/cached values */ + for (i = WM8523_AIF_CTRL1; + i < WM8523_MAX_REGISTER; i++) + snd_soc_write(codec, i, wm8523->reg_cache[i]); + + + 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; + } + codec->bias_level = level; + 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 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, +}; + +struct snd_soc_dai wm8523_dai = { + .name = "WM8523", + .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, +}; +EXPORT_SYMBOL_GPL(wm8523_dai); + +#ifdef CONFIG_PM +static int wm8523_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + + wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); + return 0; +} + +static int wm8523_resume(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + + wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); + + return 0; +} +#else +#define wm8523_suspend NULL +#define wm8523_resume NULL +#endif + +static int wm8523_probe(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec; + int ret = 0; + + if (wm8523_codec == NULL) { + dev_err(&pdev->dev, "Codec device not registered\n"); + return -ENODEV; + } + + socdev->card->codec = wm8523_codec; + codec = wm8523_codec; + + /* register pcms */ + ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); + if (ret < 0) { + dev_err(codec->dev, "failed to create pcms: %d\n", ret); + goto pcm_err; + } + + snd_soc_add_controls(codec, wm8523_snd_controls, + ARRAY_SIZE(wm8523_snd_controls)); + wm8523_add_widgets(codec); + ret = snd_soc_init_card(socdev); + if (ret < 0) { + dev_err(codec->dev, "failed to register card: %d\n", ret); + goto card_err; + } + + return ret; + +card_err: + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); +pcm_err: + return ret; +} + +static int wm8523_remove(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); + + return 0; +} + +struct snd_soc_codec_device soc_codec_dev_wm8523 = { + .probe = wm8523_probe, + .remove = wm8523_remove, + .suspend = wm8523_suspend, + .resume = wm8523_resume, +}; +EXPORT_SYMBOL_GPL(soc_codec_dev_wm8523); + +static int wm8523_register(struct wm8523_priv *wm8523, + enum snd_soc_control_type control) +{ + int ret; + struct snd_soc_codec *codec = &wm8523->codec; + int i; + + if (wm8523_codec) { + dev_err(codec->dev, "Another WM8523 is registered\n"); + return -EINVAL; + } + + mutex_init(&codec->mutex); + INIT_LIST_HEAD(&codec->dapm_widgets); + INIT_LIST_HEAD(&codec->dapm_paths); + + codec->private_data = wm8523; + codec->name = "WM8523"; + codec->owner = THIS_MODULE; + codec->bias_level = SND_SOC_BIAS_OFF; + codec->set_bias_level = wm8523_set_bias_level; + codec->dai = &wm8523_dai; + codec->num_dai = 1; + codec->reg_cache_size = WM8523_REGISTER_COUNT; + codec->reg_cache = &wm8523->reg_cache; + codec->volatile_register = wm8523_volatile_register; + + wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0]; + wm8523->rate_constraint.count = + ARRAY_SIZE(wm8523->rate_constraint_list); + + memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg)); + + ret = snd_soc_codec_set_cache_io(codec, 8, 16, control); + if (ret != 0) { + dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); + goto err; + } + + for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++) + wm8523->supplies[i].supply = wm8523_supply_names[i]; + + ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies), + wm8523->supplies); + if (ret != 0) { + dev_err(codec->dev, "Failed to request supplies: %d\n", ret); + goto err; + } + + ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), + wm8523->supplies); + if (ret != 0) { + dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); + goto err_get; + } + + ret = snd_soc_read(codec, WM8523_DEVICE_ID); + if (ret < 0) { + dev_err(codec->dev, "Failed to read ID register\n"); + goto err_enable; + } + if (ret != wm8523_reg[WM8523_DEVICE_ID]) { + dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret); + ret = -EINVAL; + goto err_enable; + } + + ret = snd_soc_read(codec, WM8523_REVISION); + if (ret < 0) { + dev_err(codec->dev, "Failed to read revision register\n"); + goto err_enable; + } + dev_info(codec->dev, "revision %c\n", + (ret & WM8523_CHIP_REV_MASK) + 'A'); + + ret = wm8523_reset(codec); + if (ret < 0) { + dev_err(codec->dev, "Failed to issue reset\n"); + goto err_enable; + } + + wm8523_dai.dev = codec->dev; + + /* Change some default settings - latch VU and enable ZC */ + wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU; + wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC; + + wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); + + /* Bias level configuration will have done an extra enable */ + regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); + + wm8523_codec = codec; + + ret = snd_soc_register_codec(codec); + if (ret != 0) { + dev_err(codec->dev, "Failed to register codec: %d\n", ret); + return ret; + } + + ret = snd_soc_register_dai(&wm8523_dai); + if (ret != 0) { + dev_err(codec->dev, "Failed to register DAI: %d\n", ret); + snd_soc_unregister_codec(codec); + return ret; + } + + return 0; + +err_enable: + regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); +err_get: + regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); +err: + kfree(wm8523); + return ret; +} + +static void wm8523_unregister(struct wm8523_priv *wm8523) +{ + wm8523_set_bias_level(&wm8523->codec, SND_SOC_BIAS_OFF); + regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); + snd_soc_unregister_dai(&wm8523_dai); + snd_soc_unregister_codec(&wm8523->codec); + kfree(wm8523); + wm8523_codec = NULL; +} + +#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) +static __devinit int wm8523_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct wm8523_priv *wm8523; + struct snd_soc_codec *codec; + + wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL); + if (wm8523 == NULL) + return -ENOMEM; + + codec = &wm8523->codec; + codec->hw_write = (hw_write_t)i2c_master_send; + + i2c_set_clientdata(i2c, wm8523); + codec->control_data = i2c; + + codec->dev = &i2c->dev; + + return wm8523_register(wm8523, SND_SOC_I2C); +} + +static __devexit int wm8523_i2c_remove(struct i2c_client *client) +{ + struct wm8523_priv *wm8523 = i2c_get_clientdata(client); + wm8523_unregister(wm8523); + return 0; +} + +#ifdef CONFIG_PM +static int wm8523_i2c_suspend(struct i2c_client *i2c, pm_message_t msg) +{ + return snd_soc_suspend_device(&i2c->dev); +} + +static int wm8523_i2c_resume(struct i2c_client *i2c) +{ + return snd_soc_resume_device(&i2c->dev); +} +#else +#define wm8523_i2c_suspend NULL +#define wm8523_i2c_resume NULL +#endif + +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, + }, + .probe = wm8523_i2c_probe, + .remove = __devexit_p(wm8523_i2c_remove), + .suspend = wm8523_i2c_suspend, + .resume = wm8523_i2c_resume, + .id_table = wm8523_i2c_id, +}; +#endif + +static int __init wm8523_modinit(void) +{ + int ret; +#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) + 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 defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) + i2c_del_driver(&wm8523_i2c_driver); +#endif +} +module_exit(wm8523_exit); + +MODULE_DESCRIPTION("ASoC WM8523 driver"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); |