/* * wm8510.c -- WM8510 ALSA Soc Audio driver * * Copyright 2006 Wolfson Microelectronics PLC. * * Author: 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8510.h" #define WM8510_VERSION "0.6" struct snd_soc_codec_device soc_codec_dev_wm8510; /* * wm8510 register cache * We can't read the WM8510 register space when we are * using 2 wire for device control, so we cache them instead. */ static const u16 wm8510_reg[WM8510_CACHEREGNUM] = { 0x0000, 0x0000, 0x0000, 0x0000, 0x0050, 0x0000, 0x0140, 0x0000, 0x0000, 0x0000, 0x0000, 0x00ff, 0x0000, 0x0000, 0x0100, 0x00ff, 0x0000, 0x0000, 0x012c, 0x002c, 0x002c, 0x002c, 0x002c, 0x0000, 0x0032, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0038, 0x000b, 0x0032, 0x0000, 0x0008, 0x000c, 0x0093, 0x00e9, 0x0000, 0x0000, 0x0000, 0x0000, 0x0003, 0x0010, 0x0000, 0x0000, 0x0000, 0x0002, 0x0001, 0x0000, 0x0000, 0x0000, 0x0039, 0x0000, 0x0001, }; #define WM8510_POWER1_BIASEN 0x08 #define WM8510_POWER1_BUFIOEN 0x10 /* * read wm8510 register cache */ static inline unsigned int wm8510_read_reg_cache(struct snd_soc_codec *codec, unsigned int reg) { u16 *cache = codec->reg_cache; if (reg == WM8510_RESET) return 0; if (reg >= WM8510_CACHEREGNUM) return -1; return cache[reg]; } /* * write wm8510 register cache */ static inline void wm8510_write_reg_cache(struct snd_soc_codec *codec, u16 reg, unsigned int value) { u16 *cache = codec->reg_cache; if (reg >= WM8510_CACHEREGNUM) return; cache[reg] = value; } /* * write to the WM8510 register space */ static int wm8510_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { u8 data[2]; /* data is * D15..D9 WM8510 register offset * D8...D0 register data */ data[0] = (reg << 1) | ((value >> 8) & 0x0001); data[1] = value & 0x00ff; wm8510_write_reg_cache(codec, reg, value); if (codec->hw_write(codec->control_data, data, 2) == 2) return 0; else return -EIO; } #define wm8510_reset(c) wm8510_write(c, WM8510_RESET, 0) static const char *wm8510_companding[] = { "Off", "NC", "u-law", "A-law" }; static const char *wm8510_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" }; static const char *wm8510_alc[] = { "ALC", "Limiter" }; static const struct soc_enum wm8510_enum[] = { SOC_ENUM_SINGLE(WM8510_COMP, 1, 4, wm8510_companding), /* adc */ SOC_ENUM_SINGLE(WM8510_COMP, 3, 4, wm8510_companding), /* dac */ SOC_ENUM_SINGLE(WM8510_DAC, 4, 4, wm8510_deemp), SOC_ENUM_SINGLE(WM8510_ALC3, 8, 2, wm8510_alc), }; static const struct snd_kcontrol_new wm8510_snd_controls[] = { SOC_SINGLE("Digital Loopback Switch", WM8510_COMP, 0, 1, 0), SOC_ENUM("DAC Companding", wm8510_enum[1]), SOC_ENUM("ADC Companding", wm8510_enum[0]), SOC_ENUM("Playback De-emphasis", wm8510_enum[2]), SOC_SINGLE("DAC Inversion Switch", WM8510_DAC, 0, 1, 0), SOC_SINGLE("Master Playback Volume", WM8510_DACVOL, 0, 127, 0), SOC_SINGLE("High Pass Filter Switch", WM8510_ADC, 8, 1, 0), SOC_SINGLE("High Pass Cut Off", WM8510_ADC, 4, 7, 0), SOC_SINGLE("ADC Inversion Switch", WM8510_COMP, 0, 1, 0), SOC_SINGLE("Capture Volume", WM8510_ADCVOL, 0, 127, 0), SOC_SINGLE("DAC Playback Limiter Switch", WM8510_DACLIM1, 8, 1, 0), SOC_SINGLE("DAC Playback Limiter Decay", WM8510_DACLIM1, 4, 15, 0), SOC_SINGLE("DAC Playback Limiter Attack", WM8510_DACLIM1, 0, 15, 0), SOC_SINGLE("DAC Playback Limiter Threshold", WM8510_DACLIM2, 4, 7, 0), SOC_SINGLE("DAC Playback Limiter Boost", WM8510_DACLIM2, 0, 15, 0), SOC_SINGLE("ALC Enable Switch", WM8510_ALC1, 8, 1, 0), SOC_SINGLE("ALC Capture Max Gain", WM8510_ALC1, 3, 7, 0), SOC_SINGLE("ALC Capture Min Gain", WM8510_ALC1, 0, 7, 0), SOC_SINGLE("ALC Capture ZC Switch", WM8510_ALC2, 8, 1, 0), SOC_SINGLE("ALC Capture Hold", WM8510_ALC2, 4, 7, 0), SOC_SINGLE("ALC Capture Target", WM8510_ALC2, 0, 15, 0), SOC_ENUM("ALC Capture Mode", wm8510_enum[3]), SOC_SINGLE("ALC Capture Decay", WM8510_ALC3, 4, 15, 0), SOC_SINGLE("ALC Capture Attack", WM8510_ALC3, 0, 15, 0), SOC_SINGLE("ALC Capture Noise Gate Switch", WM8510_NGATE, 3, 1, 0), SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8510_NGATE, 0, 7, 0), SOC_SINGLE("Capture PGA ZC Switch", WM8510_INPPGA, 7, 1, 0), SOC_SINGLE("Capture PGA Volume", WM8510_INPPGA, 0, 63, 0), SOC_SINGLE("Speaker Playback ZC Switch", WM8510_SPKVOL, 7, 1, 0), SOC_SINGLE("Speaker Playback Switch", WM8510_SPKVOL, 6, 1, 1), SOC_SINGLE("Speaker Playback Volume", WM8510_SPKVOL, 0, 63, 0), SOC_SINGLE("Speaker Boost", WM8510_OUTPUT, 2, 1, 0), SOC_SINGLE("Capture Boost(+20dB)", WM8510_ADCBOOST, 8, 1, 0), SOC_SINGLE("Mono Playback Switch", WM8510_MONOMIX, 6, 1, 1), }; /* Speaker Output Mixer */ static const struct snd_kcontrol_new wm8510_speaker_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_SPKMIX, 1, 1, 0), SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_SPKMIX, 5, 1, 0), SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_SPKMIX, 0, 1, 0), }; /* Mono Output Mixer */ static const struct snd_kcontrol_new wm8510_mono_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_MONOMIX, 1, 1, 0), SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_MONOMIX, 2, 1, 0), SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_MONOMIX, 0, 1, 0), }; static const struct snd_kcontrol_new wm8510_boost_controls[] = { SOC_DAPM_SINGLE("Mic PGA Switch", WM8510_INPPGA, 6, 1, 1), SOC_DAPM_SINGLE("Aux Volume", WM8510_ADCBOOST, 0, 7, 0), SOC_DAPM_SINGLE("Mic Volume", WM8510_ADCBOOST, 4, 7, 0), }; static const struct snd_kcontrol_new wm8510_micpga_controls[] = { SOC_DAPM_SINGLE("MICP Switch", WM8510_INPUT, 0, 1, 0), SOC_DAPM_SINGLE("MICN Switch", WM8510_INPUT, 1, 1, 0), SOC_DAPM_SINGLE("AUX Switch", WM8510_INPUT, 2, 1, 0), }; static const struct snd_soc_dapm_widget wm8510_dapm_widgets[] = { SND_SOC_DAPM_MIXER("Speaker Mixer", WM8510_POWER3, 2, 0, &wm8510_speaker_mixer_controls[0], ARRAY_SIZE(wm8510_speaker_mixer_controls)), SND_SOC_DAPM_MIXER("Mono Mixer", WM8510_POWER3, 3, 0, &wm8510_mono_mixer_controls[0], ARRAY_SIZE(wm8510_mono_mixer_controls)), SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8510_POWER3, 0, 0), SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8510_POWER2, 0, 0), SND_SOC_DAPM_PGA("Aux Input", WM8510_POWER1, 6, 0, NULL, 0), SND_SOC_DAPM_PGA("SpkN Out", WM8510_POWER3, 5, 0, NULL, 0), SND_SOC_DAPM_PGA("SpkP Out", WM8510_POWER3, 6, 0, NULL, 0), SND_SOC_DAPM_PGA("Mono Out", WM8510_POWER3, 7, 0, NULL, 0), SND_SOC_DAPM_MIXER("Mic PGA", WM8510_POWER2, 2, 0, &wm8510_micpga_controls[0], ARRAY_SIZE(wm8510_micpga_controls)), SND_SOC_DAPM_MIXER("Boost Mixer", WM8510_POWER2, 4, 0, &wm8510_boost_controls[0], ARRAY_SIZE(wm8510_boost_controls)), SND_SOC_DAPM_MICBIAS("Mic Bias", WM8510_POWER1, 4, 0), SND_SOC_DAPM_INPUT("MICN"), SND_SOC_DAPM_INPUT("MICP"), SND_SOC_DAPM_INPUT("AUX"), SND_SOC_DAPM_OUTPUT("MONOOUT"), SND_SOC_DAPM_OUTPUT("SPKOUTP"), SND_SOC_DAPM_OUTPUT("SPKOUTN"), }; static const struct snd_soc_dapm_route audio_map[] = { /* Mono output mixer */ {"Mono Mixer", "PCM Playback Switch", "DAC"}, {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, /* Speaker output mixer */ {"Speaker Mixer", "PCM Playback Switch", "DAC"}, {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, /* Outputs */ {"Mono Out", NULL, "Mono Mixer"}, {"MONOOUT", NULL, "Mono Out"}, {"SpkN Out", NULL, "Speaker Mixer"}, {"SpkP Out", NULL, "Speaker Mixer"}, {"SPKOUTN", NULL, "SpkN Out"}, {"SPKOUTP", NULL, "SpkP Out"}, /* Microphone PGA */ {"Mic PGA", "MICN Switch", "MICN"}, {"Mic PGA", "MICP Switch", "MICP"}, { "Mic PGA", "AUX Switch", "Aux Input" }, /* Boost Mixer */ {"Boost Mixer", "Mic PGA Switch", "Mic PGA"}, {"Boost Mixer", "Mic Volume", "MICP"}, {"Boost Mixer", "Aux Volume", "Aux Input"}, {"ADC", NULL, "Boost Mixer"}, }; static int wm8510_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, wm8510_dapm_widgets, ARRAY_SIZE(wm8510_dapm_widgets)); snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); snd_soc_dapm_new_widgets(codec); return 0; } struct pll_ { unsigned int pre_div:4; /* prescale - 1 */ unsigned int n:4; unsigned int k; }; static struct pll_ pll_div; /* The size in bits of the pll divide multiplied by 10 * to allow rounding later */ #define FIXED_PLL_SIZE ((1 << 24) * 10) static void pll_factors(unsigned int target, unsigned int source) { unsigned long long Kpart; unsigned int K, Ndiv, Nmod; Ndiv = target / source; if (Ndiv < 6) { source >>= 1; pll_div.pre_div = 1; Ndiv = target / source; } else pll_div.pre_div = 0; if ((Ndiv < 6) || (Ndiv > 12)) printk(KERN_WARNING "WM8510 N value %d outwith recommended range!d\n", Ndiv); pll_div.n = Ndiv; Nmod = target % source; Kpart = FIXED_PLL_SIZE * (long long)Nmod; do_div(Kpart, source); K = Kpart & 0xFFFFFFFF; /* Check if we need to round */ if ((K % 10) >= 5) K += 5; /* Move down to proper range now rounding is done */ K /= 10; pll_div.k = K; } static int wm8510_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, unsigned int freq_in, unsigned int freq_out) { struct snd_soc_codec *codec = codec_dai->codec; u16 reg; if (freq_in == 0 || freq_out == 0) { /* Clock CODEC directly from MCLK */ reg = wm8510_read_reg_cache(codec, WM8510_CLOCK); wm8510_write(codec, WM8510_CLOCK, reg & 0x0ff); /* Turn off PLL */ reg = wm8510_read_reg_cache(codec, WM8510_POWER1); wm8510_write(codec, WM8510_POWER1, reg & 0x1df); return 0; } pll_factors(freq_out*8, freq_in); wm8510_write(codec, WM8510_PLLN, (pll_div.pre_div << 4) | pll_div.n); wm8510_write(codec, WM8510_PLLK1, pll_div.k >> 18); wm8510_write(codec, WM8510_PLLK2, (pll_div.k >> 9) & 0x1ff); wm8510_write(codec, WM8510_PLLK3, pll_div.k & 0x1ff); reg = wm8510_read_reg_cache(codec, WM8510_POWER1); wm8510_write(codec, WM8510_POWER1, reg | 0x020); /* Run CODEC from PLL instead of MCLK */ reg = wm8510_read_reg_cache(codec, WM8510_CLOCK); wm8510_write(codec, WM8510_CLOCK, reg | 0x100); return 0; } /* * Configure WM8510 clock dividers. */ static int wm8510_set_dai_clkdiv(struct snd_soc_dai *codec_dai, int div_id, int div) { struct snd_soc_codec *codec = codec_dai->codec; u16 reg; switch (div_id) { case WM8510_OPCLKDIV: reg = wm8510_read_reg_cache(codec, WM8510_GPIO) & 0x1cf; wm8510_write(codec, WM8510_GPIO, reg | div); break; case WM8510_MCLKDIV: reg = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1f; wm8510_write(codec, WM8510_CLOCK, reg | div); break; case WM8510_ADCCLK: reg = wm8510_read_reg_cache(codec, WM8510_ADC) & 0x1f7; wm8510_write(codec, WM8510_ADC, reg | div); break; case WM8510_DACCLK: reg = wm8510_read_reg_cache(codec, WM8510_DAC) & 0x1f7; wm8510_write(codec, WM8510_DAC, reg | div); break; case WM8510_BCLKDIV: reg = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1e3; wm8510_write(codec, WM8510_CLOCK, reg | div); break; default: return -EINVAL; } return 0; } static int wm8510_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 iface = 0; u16 clk = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1fe; /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: clk |= 0x0001; 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 |= 0x0010; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: iface |= 0x0008; break; case SND_SOC_DAIFMT_DSP_A: iface |= 0x00018; 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 |= 0x0180; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x0100; break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x0080; break; default: return -EINVAL; } wm8510_write(codec, WM8510_IFACE, iface); wm8510_write(codec, WM8510_CLOCK, clk); return 0; } static int wm8510_pcm_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; u16 iface = wm8510_read_reg_cache(codec, WM8510_IFACE) & 0x19f; u16 adn = wm8510_read_reg_cache(codec, WM8510_ADD) & 0x1f1; /* bit size */ switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: iface |= 0x0020; break; case SNDRV_PCM_FORMAT_S24_LE: iface |= 0x0040; break; case SNDRV_PCM_FORMAT_S32_LE: iface |= 0x0060; break; } /* filter coefficient */ switch (params_rate(params)) { case SNDRV_PCM_RATE_8000: adn |= 0x5 << 1; break; case SNDRV_PCM_RATE_11025: adn |= 0x4 << 1; break; case SNDRV_PCM_RATE_16000: adn |= 0x3 << 1; break; case SNDRV_PCM_RATE_22050: adn |= 0x2 << 1; break; case SNDRV_PCM_RATE_32000: adn |= 0x1 << 1; break; case SNDRV_PCM_RATE_44100: case SNDRV_PCM_RATE_48000: break; } wm8510_write(codec, WM8510_IFACE, iface); wm8510_write(codec, WM8510_ADD, adn); return 0; } static int wm8510_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 mute_reg = wm8510_read_reg_cache(codec, WM8510_DAC) & 0xffbf; if (mute) wm8510_write(codec, WM8510_DAC, mute_reg | 0x40); else wm8510_write(codec, WM8510_DAC, mute_reg); return 0; } /* liam need to make this lower power with dapm */ static int wm8510_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { u16 power1 = wm8510_read_reg_cache(codec, WM8510_POWER1) & ~0x3; switch (level) { case SND_SOC_BIAS_ON: case SND_SOC_BIAS_PREPARE: power1 |= 0x1; /* VMID 50k */ wm8510_write(codec, WM8510_POWER1, power1); break; case SND_SOC_BIAS_STANDBY: power1 |= WM8510_POWER1_BIASEN | WM8510_POWER1_BUFIOEN; if (codec->bias_level == SND_SOC_BIAS_OFF) { /* Initial cap charge at VMID 5k */ wm8510_write(codec, WM8510_POWER1, power1 | 0x3); mdelay(100); } power1 |= 0x2; /* VMID 500k */ wm8510_write(codec, WM8510_POWER1, power1); break; case SND_SOC_BIAS_OFF: wm8510_write(codec, WM8510_POWER1, 0); wm8510_write(codec, WM8510_POWER2, 0); wm8510_write(codec, WM8510_POWER3, 0); break; } codec->bias_level = level; return 0; } #define WM8510_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) #define WM8510_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) struct snd_soc_dai wm8510_dai = { .name = "WM8510 HiFi", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = WM8510_RATES, .formats = WM8510_FORMATS,}, .capture = { .stream_name = "Capture", .channels_min = 2, .channels_max = 2, .rates = WM8510_RATES, .formats = WM8510_FORMATS,}, .ops = { .hw_params = wm8510_pcm_hw_params, .digital_mute = wm8510_mute, .set_fmt = wm8510_set_dai_fmt, .set_clkdiv = wm8510_set_dai_clkdiv, .set_pll = wm8510_set_dai_pll, }, }; EXPORT_SYMBOL_GPL(wm8510_dai); static int wm8510_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; wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8510_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(wm8510_reg); i++) { data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); data[1] = cache[i] & 0x00ff; codec->hw_write(codec->control_data, data, 2); } wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY); wm8510_set_bias_level(codec, codec->suspend_bias_level); return 0; } /* * initialise the WM8510 driver * register the mixer and dsp interfaces with the kernel */ static int wm8510_init(struct snd_soc_device *socdev) { struct snd_soc_codec *codec = socdev->card->codec; int ret = 0; codec->name = "WM8510"; codec->owner = THIS_MODULE; codec->read = wm8510_read_reg_cache; codec->write = wm8510_write; codec->set_bias_level = wm8510_set_bias_level; codec->dai = &wm8510_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(wm8510_reg); codec->reg_cache = kmemdup(wm8510_reg, sizeof(wm8510_reg), GFP_KERNEL); if (codec->reg_cache == NULL) return -ENOMEM; wm8510_reset(codec); /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { printk(KERN_ERR "wm8510: failed to create pcms\n"); goto pcm_err; } /* power on device */ codec->bias_level = SND_SOC_BIAS_OFF; wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY); snd_soc_add_controls(codec, wm8510_snd_controls, ARRAY_SIZE(wm8510_snd_controls)); wm8510_add_widgets(codec); ret = snd_soc_init_card(socdev); if (ret < 0) { printk(KERN_ERR "wm8510: failed to register card\n"); goto card_err; } return ret; card_err: snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); pcm_err: kfree(codec->reg_cache); return ret; } static struct snd_soc_device *wm8510_socdev; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) /* * WM8510 2 wire address is 0x1a */ static int wm8510_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct snd_soc_device *socdev = wm8510_socdev; struct snd_soc_codec *codec = socdev->card->codec; int ret; i2c_set_clientdata(i2c, codec); codec->control_data = i2c; ret = wm8510_init(socdev); if (ret < 0) pr_err("failed to initialise WM8510\n"); return ret; } static int wm8510_i2c_remove(struct i2c_client *client) { struct snd_soc_codec *codec = i2c_get_clientdata(client); kfree(codec->reg_cache); return 0; } static const struct i2c_device_id wm8510_i2c_id[] = { { "wm8510", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8510_i2c_id); static struct i2c_driver wm8510_i2c_driver = { .driver = { .name = "WM8510 I2C Codec", .owner = THIS_MODULE, }, .probe = wm8510_i2c_probe, .remove = wm8510_i2c_remove, .id_table = wm8510_i2c_id, }; static int wm8510_add_i2c_device(struct platform_device *pdev, const struct wm8510_setup_data *setup) { struct i2c_board_info info; struct i2c_adapter *adapter; struct i2c_client *client; int ret; ret = i2c_add_driver(&wm8510_i2c_driver); if (ret != 0) { dev_err(&pdev->dev, "can't add i2c driver\n"); return ret; } memset(&info, 0, sizeof(struct i2c_board_info)); info.addr = setup->i2c_address; strlcpy(info.type, "wm8510", I2C_NAME_SIZE); adapter = i2c_get_adapter(setup->i2c_bus); if (!adapter) { dev_err(&pdev->dev, "can't get i2c adapter %d\n", setup->i2c_bus); goto err_driver; } client = i2c_new_device(adapter, &info); i2c_put_adapter(adapter); if (!client) { dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", (unsigned int)info.addr); goto err_driver; } return 0; err_driver: i2c_del_driver(&wm8510_i2c_driver); return -ENODEV; } #endif #if defined(CONFIG_SPI_MASTER) static int __devinit wm8510_spi_probe(struct spi_device *spi) { struct snd_soc_device *socdev = wm8510_socdev; struct snd_soc_codec *codec = socdev->card->codec; int ret; codec->control_data = spi; ret = wm8510_init(socdev); if (ret < 0) dev_err(&spi->dev, "failed to initialise WM8510\n"); return ret; } static int __devexit wm8510_spi_remove(struct spi_device *spi) { return 0; } static struct spi_driver wm8510_spi_driver = { .driver = { .name = "wm8510", .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = wm8510_spi_probe, .remove = __devexit_p(wm8510_spi_remove), }; static int wm8510_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; } #endif /* CONFIG_SPI_MASTER */ static int wm8510_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct wm8510_setup_data *setup; struct snd_soc_codec *codec; int ret = 0; pr_info("WM8510 Audio Codec %s", WM8510_VERSION); setup = socdev->codec_data; codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); if (codec == NULL) return -ENOMEM; socdev->card->codec = codec; mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); wm8510_socdev = socdev; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) if (setup->i2c_address) { codec->hw_write = (hw_write_t)i2c_master_send; ret = wm8510_add_i2c_device(pdev, setup); } #endif #if defined(CONFIG_SPI_MASTER) if (setup->spi) { codec->hw_write = (hw_write_t)wm8510_spi_write; ret = spi_register_driver(&wm8510_spi_driver); if (ret != 0) printk(KERN_ERR "can't add spi driver"); } #endif if (ret != 0) kfree(codec); return ret; } /* power down chip */ static int wm8510_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; if (codec->control_data) wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) i2c_unregister_device(codec->control_data); i2c_del_driver(&wm8510_i2c_driver); #endif #if defined(CONFIG_SPI_MASTER) spi_unregister_driver(&wm8510_spi_driver); #endif kfree(codec); return 0; } struct snd_soc_codec_device soc_codec_dev_wm8510 = { .probe = wm8510_probe, .remove = wm8510_remove, .suspend = wm8510_suspend, .resume = wm8510_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8510); static int __init wm8510_modinit(void) { return snd_soc_register_dai(&wm8510_dai); } module_init(wm8510_modinit); static void __exit wm8510_exit(void) { snd_soc_unregister_dai(&wm8510_dai); } module_exit(wm8510_exit); MODULE_DESCRIPTION("ASoC WM8510 driver"); MODULE_AUTHOR("Liam Girdwood"); MODULE_LICENSE("GPL");