diff options
Diffstat (limited to 'sound/soc/codecs/wm8731.c')
| -rw-r--r-- | sound/soc/codecs/wm8731.c | 847 |
1 files changed, 847 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c new file mode 100644 index 000000000..3c5c02b03 --- /dev/null +++ b/sound/soc/codecs/wm8731.c @@ -0,0 +1,847 @@ +/* + * wm8731.c -- WM8731 ALSA SoC Audio driver + * + * Copyright 2005 Openedhand Ltd. + * Copyright 2006-12 Wolfson Microelectronics, plc + * + * Author: Richard Purdie <richard@openedhand.com> + * + * Based on wm8753.c by Liam Girdwood + * + * 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/slab.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> +#include <linux/of_device.h> +#include <linux/mutex.h> +#include <linux/clk.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 "wm8731.h" + +#define WM8731_NUM_SUPPLIES 4 +static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { + "AVDD", + "HPVDD", + "DCVDD", + "DBVDD", +}; + +/* codec private data */ +struct wm8731_priv { + struct regmap *regmap; + struct clk *mclk; + struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES]; + const struct snd_pcm_hw_constraint_list *constraints; + unsigned int sysclk; + int sysclk_type; + int playback_fs; + bool deemph; + + struct mutex lock; +}; + + +/* + * wm8731 register cache + */ +static const struct reg_default wm8731_reg_defaults[] = { + { 0, 0x0097 }, + { 1, 0x0097 }, + { 2, 0x0079 }, + { 3, 0x0079 }, + { 4, 0x000a }, + { 5, 0x0008 }, + { 6, 0x009f }, + { 7, 0x000a }, + { 8, 0x0000 }, + { 9, 0x0000 }, +}; + +static bool wm8731_volatile(struct device *dev, unsigned int reg) +{ + return reg == WM8731_RESET; +} + +#define wm8731_reset(m) regmap_write(m, WM8731_RESET, 0) + +static const char *wm8731_input_select[] = {"Line In", "Mic"}; + +static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum, + WM8731_APANA, 2, wm8731_input_select); + +static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; + +static int wm8731_set_deemph(struct snd_soc_component *component) +{ + struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); + int val, i, best; + + /* If we're using deemphasis select the nearest available sample + * rate. + */ + if (wm8731->deemph) { + best = 1; + for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { + if (abs(wm8731_deemph[i] - wm8731->playback_fs) < + abs(wm8731_deemph[best] - wm8731->playback_fs)) + best = i; + } + + val = best << 1; + } else { + best = 0; + val = 0; + } + + dev_dbg(component->dev, "Set deemphasis %d (%dHz)\n", + best, wm8731_deemph[best]); + + return snd_soc_component_update_bits(component, WM8731_APDIGI, 0x6, val); +} + +static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); + + ucontrol->value.integer.value[0] = wm8731->deemph; + + return 0; +} + +static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); + unsigned int deemph = ucontrol->value.integer.value[0]; + int ret = 0; + + if (deemph > 1) + return -EINVAL; + + mutex_lock(&wm8731->lock); + if (wm8731->deemph != deemph) { + wm8731->deemph = deemph; + + wm8731_set_deemph(component); + + ret = 1; + } + mutex_unlock(&wm8731->lock); + + return ret; +} + +static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); +static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); +static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); +static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); + +static const struct snd_kcontrol_new wm8731_snd_controls[] = { + +SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, + 0, 127, 0, out_tlv), +SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, + 7, 1, 0), + +SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, + in_tlv), +SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), + +SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), +SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), + +SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, + sidetone_tlv), + +SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), +SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), + +SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, + wm8731_get_deemph, wm8731_put_deemph), +}; + +/* Output Mixer */ +static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { +SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), +SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), +SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), +}; + +/* Input mux */ +static const struct snd_kcontrol_new wm8731_input_mux_controls = +SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); + +static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { +SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0), +SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), +SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, + &wm8731_output_mixer_controls[0], + ARRAY_SIZE(wm8731_output_mixer_controls)), +SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), +SND_SOC_DAPM_OUTPUT("LOUT"), +SND_SOC_DAPM_OUTPUT("LHPOUT"), +SND_SOC_DAPM_OUTPUT("ROUT"), +SND_SOC_DAPM_OUTPUT("RHPOUT"), +SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), +SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), +SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), +SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), +SND_SOC_DAPM_INPUT("MICIN"), +SND_SOC_DAPM_INPUT("RLINEIN"), +SND_SOC_DAPM_INPUT("LLINEIN"), +}; + +static int wm8731_check_osc(struct snd_soc_dapm_widget *source, + struct snd_soc_dapm_widget *sink) +{ + struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm); + struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); + + return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; +} + +static const struct snd_soc_dapm_route wm8731_intercon[] = { + {"DAC", NULL, "OSC", wm8731_check_osc}, + {"ADC", NULL, "OSC", wm8731_check_osc}, + {"DAC", NULL, "ACTIVE"}, + {"ADC", NULL, "ACTIVE"}, + + /* output mixer */ + {"Output Mixer", "Line Bypass Switch", "Line Input"}, + {"Output Mixer", "HiFi Playback Switch", "DAC"}, + {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, + + /* outputs */ + {"RHPOUT", NULL, "Output Mixer"}, + {"ROUT", NULL, "Output Mixer"}, + {"LHPOUT", NULL, "Output Mixer"}, + {"LOUT", NULL, "Output Mixer"}, + + /* input mux */ + {"Input Mux", "Line In", "Line Input"}, + {"Input Mux", "Mic", "Mic Bias"}, + {"ADC", NULL, "Input Mux"}, + + /* inputs */ + {"Line Input", NULL, "LLINEIN"}, + {"Line Input", NULL, "RLINEIN"}, + {"Mic Bias", NULL, "MICIN"}, +}; + +struct _coeff_div { + u32 mclk; + u32 rate; + u16 fs; + u8 sr:4; + u8 bosr:1; + u8 usb:1; +}; + +/* codec mclk clock divider coefficients */ +static const struct _coeff_div coeff_div[] = { + /* 48k */ + {12288000, 48000, 256, 0x0, 0x0, 0x0}, + {18432000, 48000, 384, 0x0, 0x1, 0x0}, + {12000000, 48000, 250, 0x0, 0x0, 0x1}, + + /* 32k */ + {12288000, 32000, 384, 0x6, 0x0, 0x0}, + {18432000, 32000, 576, 0x6, 0x1, 0x0}, + {12000000, 32000, 375, 0x6, 0x0, 0x1}, + + /* 8k */ + {12288000, 8000, 1536, 0x3, 0x0, 0x0}, + {18432000, 8000, 2304, 0x3, 0x1, 0x0}, + {11289600, 8000, 1408, 0xb, 0x0, 0x0}, + {16934400, 8000, 2112, 0xb, 0x1, 0x0}, + {12000000, 8000, 1500, 0x3, 0x0, 0x1}, + + /* 96k */ + {12288000, 96000, 128, 0x7, 0x0, 0x0}, + {18432000, 96000, 192, 0x7, 0x1, 0x0}, + {12000000, 96000, 125, 0x7, 0x0, 0x1}, + + /* 44.1k */ + {11289600, 44100, 256, 0x8, 0x0, 0x0}, + {16934400, 44100, 384, 0x8, 0x1, 0x0}, + {12000000, 44100, 272, 0x8, 0x1, 0x1}, + + /* 88.2k */ + {11289600, 88200, 128, 0xf, 0x0, 0x0}, + {16934400, 88200, 192, 0xf, 0x1, 0x0}, + {12000000, 88200, 136, 0xf, 0x1, 0x1}, +}; + +/* rates constraints */ +static const unsigned int wm8731_rates_12000000[] = { + 8000, 32000, 44100, 48000, 96000, 88200, +}; + +static const unsigned int wm8731_rates_12288000_18432000[] = { + 8000, 32000, 48000, 96000, +}; + +static const unsigned int wm8731_rates_11289600_16934400[] = { + 8000, 44100, 88200, +}; + +static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = { + .list = wm8731_rates_12000000, + .count = ARRAY_SIZE(wm8731_rates_12000000), +}; + +static const +struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = { + .list = wm8731_rates_12288000_18432000, + .count = ARRAY_SIZE(wm8731_rates_12288000_18432000), +}; + +static const +struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = { + .list = wm8731_rates_11289600_16934400, + .count = ARRAY_SIZE(wm8731_rates_11289600_16934400), +}; + +static inline int get_coeff(int mclk, int rate) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { + if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) + return i; + } + return 0; +} + +static int wm8731_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 wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); + u16 iface = snd_soc_component_read32(component, WM8731_IFACE) & 0xfff3; + int i = get_coeff(wm8731->sysclk, params_rate(params)); + u16 srate = (coeff_div[i].sr << 2) | + (coeff_div[i].bosr << 1) | coeff_div[i].usb; + + wm8731->playback_fs = params_rate(params); + + snd_soc_component_write(component, WM8731_SRATE, srate); + + /* bit size */ + switch (params_width(params)) { + case 16: + break; + case 20: + iface |= 0x0004; + break; + case 24: + iface |= 0x0008; + break; + case 32: + iface |= 0x000c; + break; + } + + wm8731_set_deemph(component); + + snd_soc_component_write(component, WM8731_IFACE, iface); + return 0; +} + +static int wm8731_mute(struct snd_soc_dai *dai, int mute) +{ + struct snd_soc_component *component = dai->component; + u16 mute_reg = snd_soc_component_read32(component, WM8731_APDIGI) & 0xfff7; + + if (mute) + snd_soc_component_write(component, WM8731_APDIGI, mute_reg | 0x8); + else + snd_soc_component_write(component, WM8731_APDIGI, mute_reg); + return 0; +} + +static int wm8731_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 snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); + struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); + + switch (clk_id) { + case WM8731_SYSCLK_XTAL: + case WM8731_SYSCLK_MCLK: + if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq)) + return -EINVAL; + wm8731->sysclk_type = clk_id; + break; + default: + return -EINVAL; + } + + switch (freq) { + case 0: + wm8731->constraints = NULL; + break; + case 12000000: + wm8731->constraints = &wm8731_constraints_12000000; + break; + case 12288000: + case 18432000: + wm8731->constraints = &wm8731_constraints_12288000_18432000; + break; + case 16934400: + case 11289600: + wm8731->constraints = &wm8731_constraints_11289600_16934400; + break; + default: + return -EINVAL; + } + + wm8731->sysclk = freq; + + snd_soc_dapm_sync(dapm); + + return 0; +} + + +static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int fmt) +{ + struct snd_soc_component *component = codec_dai->component; + u16 iface = 0; + + /* set master/slave audio interface */ + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + iface |= 0x0040; + break; + 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 |= 0x0002; + break; + case SND_SOC_DAIFMT_RIGHT_J: + break; + case SND_SOC_DAIFMT_LEFT_J: + iface |= 0x0001; + break; + case SND_SOC_DAIFMT_DSP_A: + iface |= 0x0013; + break; + case SND_SOC_DAIFMT_DSP_B: + iface |= 0x0003; + break; + default: + return -EINVAL; + } + + /* clock inversion */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_IB_IF: + iface |= 0x0090; + break; + case SND_SOC_DAIFMT_IB_NF: + iface |= 0x0080; + break; + case SND_SOC_DAIFMT_NB_IF: + iface |= 0x0010; + break; + default: + return -EINVAL; + } + + /* set iface */ + snd_soc_component_write(component, WM8731_IFACE, iface); + return 0; +} + +static int wm8731_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); + int ret; + u16 reg; + + switch (level) { + case SND_SOC_BIAS_ON: + if (wm8731->mclk) { + ret = clk_prepare_enable(wm8731->mclk); + if (ret) + return ret; + } + break; + case SND_SOC_BIAS_PREPARE: + break; + case SND_SOC_BIAS_STANDBY: + if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { + ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), + wm8731->supplies); + if (ret != 0) + return ret; + + regcache_sync(wm8731->regmap); + } + + /* Clear PWROFF, gate CLKOUT, everything else as-is */ + reg = snd_soc_component_read32(component, WM8731_PWR) & 0xff7f; + snd_soc_component_write(component, WM8731_PWR, reg | 0x0040); + break; + case SND_SOC_BIAS_OFF: + if (wm8731->mclk) + clk_disable_unprepare(wm8731->mclk); + snd_soc_component_write(component, WM8731_PWR, 0xffff); + regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), + wm8731->supplies); + regcache_mark_dirty(wm8731->regmap); + break; + } + return 0; +} + +static int wm8731_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(dai->component); + + if (wm8731->constraints) + snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, + wm8731->constraints); + + return 0; +} + +#define WM8731_RATES SNDRV_PCM_RATE_8000_96000 + +#define WM8731_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 wm8731_dai_ops = { + .startup = wm8731_startup, + .hw_params = wm8731_hw_params, + .digital_mute = wm8731_mute, + .set_sysclk = wm8731_set_dai_sysclk, + .set_fmt = wm8731_set_dai_fmt, +}; + +static struct snd_soc_dai_driver wm8731_dai = { + .name = "wm8731-hifi", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 2, + .rates = WM8731_RATES, + .formats = WM8731_FORMATS,}, + .capture = { + .stream_name = "Capture", + .channels_min = 1, + .channels_max = 2, + .rates = WM8731_RATES, + .formats = WM8731_FORMATS,}, + .ops = &wm8731_dai_ops, + .symmetric_rates = 1, +}; + +static int wm8731_request_supplies(struct device *dev, + struct wm8731_priv *wm8731) +{ + int ret = 0, i; + + for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) + wm8731->supplies[i].supply = wm8731_supply_names[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies), + wm8731->supplies); + if (ret != 0) { + dev_err(dev, "Failed to request supplies: %d\n", ret); + return ret; + } + + ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), + wm8731->supplies); + if (ret != 0) { + dev_err(dev, "Failed to enable supplies: %d\n", ret); + return ret; + } + + return 0; +} + +static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731) +{ + int ret = 0; + + ret = wm8731_reset(wm8731->regmap); + if (ret < 0) { + dev_err(dev, "Failed to issue reset: %d\n", ret); + goto err; + } + + /* Clear POWEROFF, keep everything else disabled */ + regmap_write(wm8731->regmap, WM8731_PWR, 0x7f); + + /* Latch the update bits */ + regmap_update_bits(wm8731->regmap, WM8731_LOUT1V, 0x100, 0); + regmap_update_bits(wm8731->regmap, WM8731_ROUT1V, 0x100, 0); + regmap_update_bits(wm8731->regmap, WM8731_LINVOL, 0x100, 0); + regmap_update_bits(wm8731->regmap, WM8731_RINVOL, 0x100, 0); + + /* Disable bypass path by default */ + regmap_update_bits(wm8731->regmap, WM8731_APANA, 0x8, 0); + + regcache_mark_dirty(wm8731->regmap); + +err: + return ret; +} + +static const struct snd_soc_component_driver soc_component_dev_wm8731 = { + .set_bias_level = wm8731_set_bias_level, + .controls = wm8731_snd_controls, + .num_controls = ARRAY_SIZE(wm8731_snd_controls), + .dapm_widgets = wm8731_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), + .dapm_routes = wm8731_intercon, + .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), + .suspend_bias_off = 1, + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, + .non_legacy_dai_naming = 1, +}; + +static const struct of_device_id wm8731_of_match[] = { + { .compatible = "wlf,wm8731", }, + { } +}; + +MODULE_DEVICE_TABLE(of, wm8731_of_match); + +static const struct regmap_config wm8731_regmap = { + .reg_bits = 7, + .val_bits = 9, + + .max_register = WM8731_RESET, + .volatile_reg = wm8731_volatile, + + .cache_type = REGCACHE_RBTREE, + .reg_defaults = wm8731_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults), +}; + +#if defined(CONFIG_SPI_MASTER) +static int wm8731_spi_probe(struct spi_device *spi) +{ + struct wm8731_priv *wm8731; + int ret; + + wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL); + if (wm8731 == NULL) + return -ENOMEM; + + wm8731->mclk = devm_clk_get(&spi->dev, "mclk"); + if (IS_ERR(wm8731->mclk)) { + ret = PTR_ERR(wm8731->mclk); + if (ret == -ENOENT) { + wm8731->mclk = NULL; + dev_warn(&spi->dev, "Assuming static MCLK\n"); + } else { + dev_err(&spi->dev, "Failed to get MCLK: %d\n", + ret); + return ret; + } + } + + mutex_init(&wm8731->lock); + + spi_set_drvdata(spi, wm8731); + + ret = wm8731_request_supplies(&spi->dev, wm8731); + if (ret != 0) + return ret; + + wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap); + if (IS_ERR(wm8731->regmap)) { + ret = PTR_ERR(wm8731->regmap); + dev_err(&spi->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + ret = wm8731_hw_init(&spi->dev, wm8731); + if (ret != 0) + return ret; + + ret = devm_snd_soc_register_component(&spi->dev, + &soc_component_dev_wm8731, &wm8731_dai, 1); + if (ret != 0) { + dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret); + return ret; + } + + return 0; +} + +static int wm8731_spi_remove(struct spi_device *spi) +{ + return 0; +} + +static struct spi_driver wm8731_spi_driver = { + .driver = { + .name = "wm8731", + .of_match_table = wm8731_of_match, + }, + .probe = wm8731_spi_probe, + .remove = wm8731_spi_remove, +}; +#endif /* CONFIG_SPI_MASTER */ + +#if IS_ENABLED(CONFIG_I2C) +static int wm8731_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct wm8731_priv *wm8731; + int ret; + + wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv), + GFP_KERNEL); + if (wm8731 == NULL) + return -ENOMEM; + + wm8731->mclk = devm_clk_get(&i2c->dev, "mclk"); + if (IS_ERR(wm8731->mclk)) { + ret = PTR_ERR(wm8731->mclk); + if (ret == -ENOENT) { + wm8731->mclk = NULL; + dev_warn(&i2c->dev, "Assuming static MCLK\n"); + } else { + dev_err(&i2c->dev, "Failed to get MCLK: %d\n", + ret); + return ret; + } + } + + mutex_init(&wm8731->lock); + + i2c_set_clientdata(i2c, wm8731); + + ret = wm8731_request_supplies(&i2c->dev, wm8731); + if (ret != 0) + return ret; + + wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap); + if (IS_ERR(wm8731->regmap)) { + ret = PTR_ERR(wm8731->regmap); + dev_err(&i2c->dev, "Failed to allocate register map: %d\n", + ret); + goto err_regulator_enable; + } + + ret = wm8731_hw_init(&i2c->dev, wm8731); + if (ret != 0) + goto err_regulator_enable; + + ret = devm_snd_soc_register_component(&i2c->dev, + &soc_component_dev_wm8731, &wm8731_dai, 1); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret); + goto err_regulator_enable; + } + + return 0; + +err_regulator_enable: + /* Regulators will be enabled by bias management */ + regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); + + return ret; +} + +static int wm8731_i2c_remove(struct i2c_client *client) +{ + return 0; +} + +static const struct i2c_device_id wm8731_i2c_id[] = { + { "wm8731", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); + +static struct i2c_driver wm8731_i2c_driver = { + .driver = { + .name = "wm8731", + .of_match_table = wm8731_of_match, + }, + .probe = wm8731_i2c_probe, + .remove = wm8731_i2c_remove, + .id_table = wm8731_i2c_id, +}; +#endif + +static int __init wm8731_modinit(void) +{ + int ret = 0; +#if IS_ENABLED(CONFIG_I2C) + ret = i2c_add_driver(&wm8731_i2c_driver); + if (ret != 0) { + printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n", + ret); + } +#endif +#if defined(CONFIG_SPI_MASTER) + ret = spi_register_driver(&wm8731_spi_driver); + if (ret != 0) { + printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n", + ret); + } +#endif + return ret; +} +module_init(wm8731_modinit); + +static void __exit wm8731_exit(void) +{ +#if IS_ENABLED(CONFIG_I2C) + i2c_del_driver(&wm8731_i2c_driver); +#endif +#if defined(CONFIG_SPI_MASTER) + spi_unregister_driver(&wm8731_spi_driver); +#endif +} +module_exit(wm8731_exit); + +MODULE_DESCRIPTION("ASoC WM8731 driver"); +MODULE_AUTHOR("Richard Purdie"); +MODULE_LICENSE("GPL"); |