| /* |
| * wm8731.c -- WM8731 ALSA SoC Audio driver |
| * |
| * Copyright 2005 Openedhand Ltd. |
| * |
| * 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/platform_device.h> |
| #include <linux/spi/spi.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 "wm8731.h" |
| |
| static struct snd_soc_codec *wm8731_codec; |
| struct snd_soc_codec_device soc_codec_dev_wm8731; |
| |
| /* codec private data */ |
| struct wm8731_priv { |
| struct snd_soc_codec codec; |
| u16 reg_cache[WM8731_CACHEREGNUM]; |
| unsigned int sysclk; |
| }; |
| |
| #ifdef CONFIG_SPI_MASTER |
| static int wm8731_spi_write(struct spi_device *spi, const char *data, int len); |
| #endif |
| |
| /* |
| * wm8731 register cache |
| * We can't read the WM8731 register space when we are |
| * using 2 wire for device control, so we cache them instead. |
| * There is no point in caching the reset register |
| */ |
| static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { |
| 0x0097, 0x0097, 0x0079, 0x0079, |
| 0x000a, 0x0008, 0x009f, 0x000a, |
| 0x0000, 0x0000 |
| }; |
| |
| /* |
| * read wm8731 register cache |
| */ |
| static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec, |
| unsigned int reg) |
| { |
| u16 *cache = codec->reg_cache; |
| if (reg == WM8731_RESET) |
| return 0; |
| if (reg >= WM8731_CACHEREGNUM) |
| return -1; |
| return cache[reg]; |
| } |
| |
| /* |
| * write wm8731 register cache |
| */ |
| static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec, |
| u16 reg, unsigned int value) |
| { |
| u16 *cache = codec->reg_cache; |
| if (reg >= WM8731_CACHEREGNUM) |
| return; |
| cache[reg] = value; |
| } |
| |
| /* |
| * write to the WM8731 register space |
| */ |
| static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg, |
| unsigned int value) |
| { |
| u8 data[2]; |
| |
| /* data is |
| * D15..D9 WM8731 register offset |
| * D8...D0 register data |
| */ |
| data[0] = (reg << 1) | ((value >> 8) & 0x0001); |
| data[1] = value & 0x00ff; |
| |
| wm8731_write_reg_cache(codec, reg, value); |
| if (codec->hw_write(codec->control_data, data, 2) == 2) |
| return 0; |
| else |
| return -EIO; |
| } |
| |
| #define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0) |
| |
| static const char *wm8731_input_select[] = {"Line In", "Mic"}; |
| static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; |
| |
| static const struct soc_enum wm8731_enum[] = { |
| SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select), |
| SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph), |
| }; |
| |
| static const struct snd_kcontrol_new wm8731_snd_controls[] = { |
| |
| SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, |
| 0, 127, 0), |
| SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, |
| 7, 1, 0), |
| |
| SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0), |
| SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), |
| |
| SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0), |
| SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1), |
| |
| SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1), |
| |
| SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), |
| SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), |
| |
| SOC_ENUM("Playback De-emphasis", wm8731_enum[1]), |
| }; |
| |
| /* 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_enum[0]); |
| |
| static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { |
| 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 const struct snd_soc_dapm_route intercon[] = { |
| /* 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"}, |
| }; |
| |
| static int wm8731_add_widgets(struct snd_soc_codec *codec) |
| { |
| snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets, |
| ARRAY_SIZE(wm8731_dapm_widgets)); |
| |
| snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); |
| |
| snd_soc_dapm_new_widgets(codec); |
| return 0; |
| } |
| |
| 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}, |
| }; |
| |
| 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_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_device *socdev = rtd->socdev; |
| struct snd_soc_codec *codec = socdev->card->codec; |
| struct wm8731_priv *wm8731 = codec->private_data; |
| u16 iface = wm8731_read_reg_cache(codec, 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_write(codec, WM8731_SRATE, srate); |
| |
| /* bit size */ |
| switch (params_format(params)) { |
| case SNDRV_PCM_FORMAT_S16_LE: |
| break; |
| case SNDRV_PCM_FORMAT_S20_3LE: |
| iface |= 0x0004; |
| break; |
| case SNDRV_PCM_FORMAT_S24_LE: |
| iface |= 0x0008; |
| break; |
| } |
| |
| wm8731_write(codec, WM8731_IFACE, iface); |
| return 0; |
| } |
| |
| static int wm8731_pcm_prepare(struct snd_pcm_substream *substream, |
| 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; |
| |
| /* set active */ |
| wm8731_write(codec, WM8731_ACTIVE, 0x0001); |
| |
| return 0; |
| } |
| |
| static void wm8731_shutdown(struct snd_pcm_substream *substream, |
| 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; |
| |
| /* deactivate */ |
| if (!codec->active) { |
| udelay(50); |
| wm8731_write(codec, WM8731_ACTIVE, 0x0); |
| } |
| } |
| |
| static int wm8731_mute(struct snd_soc_dai *dai, int mute) |
| { |
| struct snd_soc_codec *codec = dai->codec; |
| u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7; |
| |
| if (mute) |
| wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8); |
| else |
| wm8731_write(codec, 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_codec *codec = codec_dai->codec; |
| struct wm8731_priv *wm8731 = codec->private_data; |
| |
| switch (freq) { |
| case 11289600: |
| case 12000000: |
| case 12288000: |
| case 16934400: |
| case 18432000: |
| wm8731->sysclk = freq; |
| return 0; |
| } |
| return -EINVAL; |
| } |
| |
| |
| static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, |
| unsigned int fmt) |
| { |
| struct snd_soc_codec *codec = codec_dai->codec; |
| 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 |= 0x0003; |
| break; |
| case SND_SOC_DAIFMT_DSP_B: |
| iface |= 0x0013; |
| 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 */ |
| wm8731_write(codec, WM8731_IFACE, iface); |
| return 0; |
| } |
| |
| static int wm8731_set_bias_level(struct snd_soc_codec *codec, |
| enum snd_soc_bias_level level) |
| { |
| u16 reg; |
| |
| switch (level) { |
| case SND_SOC_BIAS_ON: |
| break; |
| case SND_SOC_BIAS_PREPARE: |
| break; |
| case SND_SOC_BIAS_STANDBY: |
| /* Clear PWROFF, gate CLKOUT, everything else as-is */ |
| reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f; |
| wm8731_write(codec, WM8731_PWR, reg | 0x0040); |
| break; |
| case SND_SOC_BIAS_OFF: |
| wm8731_write(codec, WM8731_ACTIVE, 0x0); |
| wm8731_write(codec, WM8731_PWR, 0xffff); |
| break; |
| } |
| codec->bias_level = level; |
| return 0; |
| } |
| |
| #define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
| SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ |
| SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ |
| SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ |
| SNDRV_PCM_RATE_96000) |
| |
| #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ |
| SNDRV_PCM_FMTBIT_S24_LE) |
| |
| struct snd_soc_dai wm8731_dai = { |
| .name = "WM8731", |
| .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 = { |
| .prepare = wm8731_pcm_prepare, |
| .hw_params = wm8731_hw_params, |
| .shutdown = wm8731_shutdown, |
| .digital_mute = wm8731_mute, |
| .set_sysclk = wm8731_set_dai_sysclk, |
| .set_fmt = wm8731_set_dai_fmt, |
| } |
| }; |
| EXPORT_SYMBOL_GPL(wm8731_dai); |
| |
| static int wm8731_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; |
| |
| wm8731_write(codec, WM8731_ACTIVE, 0x0); |
| wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); |
| return 0; |
| } |
| |
| static int wm8731_resume(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct snd_soc_codec *codec = socdev->card->codec; |
| int i; |
| u8 data[2]; |
| u16 *cache = codec->reg_cache; |
| |
| /* Sync reg_cache with the hardware */ |
| for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { |
| data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); |
| data[1] = cache[i] & 0x00ff; |
| codec->hw_write(codec->control_data, data, 2); |
| } |
| wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
| wm8731_set_bias_level(codec, codec->suspend_bias_level); |
| return 0; |
| } |
| |
| static int wm8731_probe(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct snd_soc_codec *codec; |
| int ret = 0; |
| |
| if (wm8731_codec == NULL) { |
| dev_err(&pdev->dev, "Codec device not registered\n"); |
| return -ENODEV; |
| } |
| |
| socdev->card->codec = wm8731_codec; |
| codec = wm8731_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, wm8731_snd_controls, |
| ARRAY_SIZE(wm8731_snd_controls)); |
| wm8731_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; |
| } |
| |
| /* power down chip */ |
| static int wm8731_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_wm8731 = { |
| .probe = wm8731_probe, |
| .remove = wm8731_remove, |
| .suspend = wm8731_suspend, |
| .resume = wm8731_resume, |
| }; |
| EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731); |
| |
| static int wm8731_register(struct wm8731_priv *wm8731) |
| { |
| int ret; |
| struct snd_soc_codec *codec = &wm8731->codec; |
| u16 reg; |
| |
| if (wm8731_codec) { |
| dev_err(codec->dev, "Another WM8731 is registered\n"); |
| return -EINVAL; |
| } |
| |
| mutex_init(&codec->mutex); |
| INIT_LIST_HEAD(&codec->dapm_widgets); |
| INIT_LIST_HEAD(&codec->dapm_paths); |
| |
| codec->private_data = wm8731; |
| codec->name = "WM8731"; |
| codec->owner = THIS_MODULE; |
| codec->read = wm8731_read_reg_cache; |
| codec->write = wm8731_write; |
| codec->bias_level = SND_SOC_BIAS_OFF; |
| codec->set_bias_level = wm8731_set_bias_level; |
| codec->dai = &wm8731_dai; |
| codec->num_dai = 1; |
| codec->reg_cache_size = WM8731_CACHEREGNUM; |
| codec->reg_cache = &wm8731->reg_cache; |
| |
| memcpy(codec->reg_cache, wm8731_reg, sizeof(wm8731_reg)); |
| |
| ret = wm8731_reset(codec); |
| if (ret < 0) { |
| dev_err(codec->dev, "Failed to issue reset\n"); |
| return ret; |
| } |
| |
| wm8731_dai.dev = codec->dev; |
| |
| wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
| |
| /* Latch the update bits */ |
| reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V); |
| wm8731_write(codec, WM8731_LOUT1V, reg & ~0x0100); |
| reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V); |
| wm8731_write(codec, WM8731_ROUT1V, reg & ~0x0100); |
| reg = wm8731_read_reg_cache(codec, WM8731_LINVOL); |
| wm8731_write(codec, WM8731_LINVOL, reg & ~0x0100); |
| reg = wm8731_read_reg_cache(codec, WM8731_RINVOL); |
| wm8731_write(codec, WM8731_RINVOL, reg & ~0x0100); |
| |
| /* Disable bypass path by default */ |
| reg = wm8731_read_reg_cache(codec, WM8731_APANA); |
| wm8731_write(codec, WM8731_APANA, reg & ~0x4); |
| |
| wm8731_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(&wm8731_dai); |
| if (ret != 0) { |
| dev_err(codec->dev, "Failed to register DAI: %d\n", ret); |
| snd_soc_unregister_codec(codec); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void wm8731_unregister(struct wm8731_priv *wm8731) |
| { |
| wm8731_set_bias_level(&wm8731->codec, SND_SOC_BIAS_OFF); |
| snd_soc_unregister_dai(&wm8731_dai); |
| snd_soc_unregister_codec(&wm8731->codec); |
| kfree(wm8731); |
| wm8731_codec = NULL; |
| } |
| |
| #if defined(CONFIG_SPI_MASTER) |
| static int wm8731_spi_write(struct spi_device *spi, const char *data, int len) |
| { |
| struct spi_transfer t; |
| struct spi_message m; |
| u8 msg[2]; |
| |
| if (len <= 0) |
| return 0; |
| |
| msg[0] = data[0]; |
| msg[1] = data[1]; |
| |
| spi_message_init(&m); |
| memset(&t, 0, (sizeof t)); |
| |
| t.tx_buf = &msg[0]; |
| t.len = len; |
| |
| spi_message_add_tail(&t, &m); |
| spi_sync(spi, &m); |
| |
| return len; |
| } |
| |
| static int __devinit wm8731_spi_probe(struct spi_device *spi) |
| { |
| struct snd_soc_codec *codec; |
| struct wm8731_priv *wm8731; |
| |
| wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); |
| if (wm8731 == NULL) |
| return -ENOMEM; |
| |
| codec = &wm8731->codec; |
| codec->control_data = spi; |
| codec->hw_write = (hw_write_t)wm8731_spi_write; |
| codec->dev = &spi->dev; |
| |
| spi->dev.driver_data = wm8731; |
| |
| return wm8731_register(wm8731); |
| } |
| |
| static int __devexit wm8731_spi_remove(struct spi_device *spi) |
| { |
| struct wm8731_priv *wm8731 = spi->dev.driver_data; |
| |
| wm8731_unregister(wm8731); |
| |
| return 0; |
| } |
| |
| static struct spi_driver wm8731_spi_driver = { |
| .driver = { |
| .name = "wm8731", |
| .bus = &spi_bus_type, |
| .owner = THIS_MODULE, |
| }, |
| .probe = wm8731_spi_probe, |
| .remove = __devexit_p(wm8731_spi_remove), |
| }; |
| #endif /* CONFIG_SPI_MASTER */ |
| |
| #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| static __devinit int wm8731_i2c_probe(struct i2c_client *i2c, |
| const struct i2c_device_id *id) |
| { |
| struct wm8731_priv *wm8731; |
| struct snd_soc_codec *codec; |
| |
| wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); |
| if (wm8731 == NULL) |
| return -ENOMEM; |
| |
| codec = &wm8731->codec; |
| codec->hw_write = (hw_write_t)i2c_master_send; |
| |
| i2c_set_clientdata(i2c, wm8731); |
| codec->control_data = i2c; |
| |
| codec->dev = &i2c->dev; |
| |
| return wm8731_register(wm8731); |
| } |
| |
| static __devexit int wm8731_i2c_remove(struct i2c_client *client) |
| { |
| struct wm8731_priv *wm8731 = i2c_get_clientdata(client); |
| wm8731_unregister(wm8731); |
| 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 I2C Codec", |
| .owner = THIS_MODULE, |
| }, |
| .probe = wm8731_i2c_probe, |
| .remove = __devexit_p(wm8731_i2c_remove), |
| .id_table = wm8731_i2c_id, |
| }; |
| #endif |
| |
| static int __init wm8731_modinit(void) |
| { |
| int ret; |
| #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| 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 0; |
| } |
| module_init(wm8731_modinit); |
| |
| static void __exit wm8731_exit(void) |
| { |
| #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| 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"); |