/* * wm8940.c -- WM8940 ALSA Soc Audio driver * * Author: Jonathan Cameron * * Based on wm8510.c * 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. * * Not currently handled: * Notch filter control * AUXMode (inverting vs mixer) * No means to obtain current gain if alc enabled. * No use made of gpio * Fast VMID discharge for power down * Soft Start * DLR and ALR Swaps not enabled * Digital Sidetone not supported */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8940.h" struct wm8940_priv { unsigned int sysclk; u16 reg_cache[WM8940_CACHEREGNUM]; struct snd_soc_codec codec; }; static u16 wm8940_reg_defaults[] = { 0x8940, /* Soft Reset */ 0x0000, /* Power 1 */ 0x0000, /* Power 2 */ 0x0000, /* Power 3 */ 0x0010, /* Interface Control */ 0x0000, /* Companding Control */ 0x0140, /* Clock Control */ 0x0000, /* Additional Controls */ 0x0000, /* GPIO Control */ 0x0002, /* Auto Increment Control */ 0x0000, /* DAC Control */ 0x00FF, /* DAC Volume */ 0, 0, 0x0100, /* ADC Control */ 0x00FF, /* ADC Volume */ 0x0000, /* Notch Filter 1 Control 1 */ 0x0000, /* Notch Filter 1 Control 2 */ 0x0000, /* Notch Filter 2 Control 1 */ 0x0000, /* Notch Filter 2 Control 2 */ 0x0000, /* Notch Filter 3 Control 1 */ 0x0000, /* Notch Filter 3 Control 2 */ 0x0000, /* Notch Filter 4 Control 1 */ 0x0000, /* Notch Filter 4 Control 2 */ 0x0032, /* DAC Limit Control 1 */ 0x0000, /* DAC Limit Control 2 */ 0, 0, 0, 0, 0, 0, 0x0038, /* ALC Control 1 */ 0x000B, /* ALC Control 2 */ 0x0032, /* ALC Control 3 */ 0x0000, /* Noise Gate */ 0x0041, /* PLLN */ 0x000C, /* PLLK1 */ 0x0093, /* PLLK2 */ 0x00E9, /* PLLK3 */ 0, 0, 0x0030, /* ALC Control 4 */ 0, 0x0002, /* Input Control */ 0x0050, /* PGA Gain */ 0, 0x0002, /* ADC Boost Control */ 0, 0x0002, /* Output Control */ 0x0000, /* Speaker Mixer Control */ 0, 0, 0, 0x0079, /* Speaker Volume */ 0, 0x0000, /* Mono Mixer Control */ }; static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; static const struct soc_enum wm8940_adc_companding_enum = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding); static const struct soc_enum wm8940_dac_companding_enum = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding); static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; static const struct soc_enum wm8940_alc_mode_enum = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text); static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; static const struct soc_enum wm8940_mic_bias_level_enum = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text); static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; static const struct soc_enum wm8940_filter_mode_enum = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text); static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1); static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0); static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0); static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0); static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0); static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0); static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0); static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0); static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1); static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0); static const struct snd_kcontrol_new wm8940_snd_controls[] = { SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL, 6, 1, 0), SOC_ENUM("DAC Companding", wm8940_dac_companding_enum), SOC_ENUM("ADC Companding", wm8940_adc_companding_enum), SOC_ENUM("ALC Mode", wm8940_alc_mode_enum), SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0), SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1, 3, 7, 1, wm8940_alc_max_tlv), SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1, 0, 7, 0, wm8940_alc_min_tlv), SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2, 0, 14, 0, wm8940_alc_tar_tlv), SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0), SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0), SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0), SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0), SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE, 3, 1, 0), SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE, 0, 7, 0), SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0), SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0), SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0), SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2, 4, 9, 1, wm8940_lim_thresh_tlv), SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2, 0, 12, 0, wm8940_lim_boost_tlv), SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0), SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN, 0, 63, 0, wm8940_pga_vol_tlv), SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL, 0, 255, 0, wm8940_adc_tlv), SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL, 0, 255, 0, wm8940_adc_tlv), SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum), SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST, 8, 1, 0, wm8940_capture_boost_vol_tlv), SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL, 0, 63, 0, wm8940_spk_vol_tlv), SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1), SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL, 8, 1, 1, wm8940_att_tlv), SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0), SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1), SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX, 7, 1, 1, wm8940_att_tlv), SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0), SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum), SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0), SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0), SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0), SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0), SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0), }; static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0), SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0), SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0), }; static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0), SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0), SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0), }; static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1); static const struct snd_kcontrol_new wm8940_input_boost_controls[] = { SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1), SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST, 0, 7, 0, wm8940_boost_vol_tlv), SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST, 4, 7, 0, wm8940_boost_vol_tlv), }; static const struct snd_kcontrol_new wm8940_micpga_controls[] = { SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0), SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0), SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0), }; static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = { SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0, &wm8940_speaker_mixer_controls[0], ARRAY_SIZE(wm8940_speaker_mixer_controls)), SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0, &wm8940_mono_mixer_controls[0], ARRAY_SIZE(wm8940_mono_mixer_controls)), SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0), SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0), SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0), SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0), SND_SOC_DAPM_OUTPUT("MONOOUT"), SND_SOC_DAPM_OUTPUT("SPKOUTP"), SND_SOC_DAPM_OUTPUT("SPKOUTN"), SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0), SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0), SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0, &wm8940_micpga_controls[0], ARRAY_SIZE(wm8940_micpga_controls)), SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0, &wm8940_input_boost_controls[0], ARRAY_SIZE(wm8940_input_boost_controls)), SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0), SND_SOC_DAPM_INPUT("MICN"), SND_SOC_DAPM_INPUT("MICP"), SND_SOC_DAPM_INPUT("AUX"), }; 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"}, /* 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 wm8940_add_widgets(struct snd_soc_codec *codec) { int ret; ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets, ARRAY_SIZE(wm8940_dapm_widgets)); if (ret) goto error_ret; ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); if (ret) goto error_ret; error_ret: return ret; } #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0); static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67; u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe; switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: clk |= 1; break; case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } snd_soc_write(codec, WM8940_CLOCK, clk); switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: iface |= (2 << 3); break; case SND_SOC_DAIFMT_LEFT_J: iface |= (1 << 3); break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_DSP_A: iface |= (3 << 3); break; case SND_SOC_DAIFMT_DSP_B: iface |= (3 << 3) | (1 << 7); break; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_NB_IF: iface |= (1 << 7); break; case SND_SOC_DAIFMT_IB_NF: iface |= (1 << 8); break; case SND_SOC_DAIFMT_IB_IF: iface |= (1 << 8) | (1 << 7); break; } snd_soc_write(codec, WM8940_IFACE, iface); return 0; } static int wm8940_i2s_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 = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F; u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1; u16 companding = snd_soc_read(codec, WM8940_COMPANDINGCTL) & 0xFFDF; int ret; /* LoutR control */ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && params_channels(params) == 2) iface |= (1 << 9); switch (params_rate(params)) { case SNDRV_PCM_RATE_8000: addcntrl |= (0x5 << 1); break; case SNDRV_PCM_RATE_11025: addcntrl |= (0x4 << 1); break; case SNDRV_PCM_RATE_16000: addcntrl |= (0x3 << 1); break; case SNDRV_PCM_RATE_22050: addcntrl |= (0x2 << 1); break; case SNDRV_PCM_RATE_32000: addcntrl |= (0x1 << 1); break; case SNDRV_PCM_RATE_44100: case SNDRV_PCM_RATE_48000: break; } ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl); if (ret) goto error_ret; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S8: companding = companding | (1 << 5); break; case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: iface |= (1 << 5); break; case SNDRV_PCM_FORMAT_S24_LE: iface |= (2 << 5); break; case SNDRV_PCM_FORMAT_S32_LE: iface |= (3 << 5); break; } ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding); if (ret) goto error_ret; ret = snd_soc_write(codec, WM8940_IFACE, iface); error_ret: return ret; } static int wm8940_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf; if (mute) mute_reg |= 0x40; return snd_soc_write(codec, WM8940_DAC, mute_reg); } static int wm8940_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { u16 val; u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0; int ret = 0; switch (level) { case SND_SOC_BIAS_ON: /* ensure bufioen and biasen */ pwr_reg |= (1 << 2) | (1 << 3); /* Enable thermal shutdown */ val = snd_soc_read(codec, WM8940_OUTPUTCTL); ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2); if (ret) break; /* set vmid to 75k */ ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); break; case SND_SOC_BIAS_PREPARE: /* ensure bufioen and biasen */ pwr_reg |= (1 << 2) | (1 << 3); ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1); break; case SND_SOC_BIAS_STANDBY: /* ensure bufioen and biasen */ pwr_reg |= (1 << 2) | (1 << 3); /* set vmid to 300k for standby */ ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2); break; case SND_SOC_BIAS_OFF: ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg); break; } return ret; } struct pll_ { unsigned int pre_scale:2; 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; /* The left shift ist to avoid accuracy loss when right shifting */ Ndiv = target / source; if (Ndiv > 12) { source <<= 1; /* Multiply by 2 */ pll_div.pre_scale = 0; Ndiv = target / source; } else if (Ndiv < 3) { source >>= 2; /* Divide by 4 */ pll_div.pre_scale = 3; Ndiv = target / source; } else if (Ndiv < 6) { source >>= 1; /* divide by 2 */ pll_div.pre_scale = 2; Ndiv = target / source; } else pll_div.pre_scale = 1; if ((Ndiv < 6) || (Ndiv > 12)) printk(KERN_WARNING "WM8940 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; } /* Untested at the moment */ static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, int source, unsigned int freq_in, unsigned int freq_out) { struct snd_soc_codec *codec = codec_dai->codec; u16 reg; /* Turn off PLL */ reg = snd_soc_read(codec, WM8940_POWER1); snd_soc_write(codec, WM8940_POWER1, reg & 0x1df); if (freq_in == 0 || freq_out == 0) { /* Clock CODEC directly from MCLK */ reg = snd_soc_read(codec, WM8940_CLOCK); snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff); /* Pll power down */ snd_soc_write(codec, WM8940_PLLN, (1 << 7)); return 0; } /* Pll is followed by a frequency divide by 4 */ pll_factors(freq_out*4, freq_in); if (pll_div.k) snd_soc_write(codec, WM8940_PLLN, (pll_div.pre_scale << 4) | pll_div.n | (1 << 6)); else /* No factional component */ snd_soc_write(codec, WM8940_PLLN, (pll_div.pre_scale << 4) | pll_div.n); snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18); snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff); snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff); /* Enable the PLL */ reg = snd_soc_read(codec, WM8940_POWER1); snd_soc_write(codec, WM8940_POWER1, reg | 0x020); /* Run CODEC from PLL instead of MCLK */ reg = snd_soc_read(codec, WM8940_CLOCK); snd_soc_write(codec, WM8940_CLOCK, reg | 0x100); return 0; } static int wm8940_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 wm8940_priv *wm8940 = codec->private_data; switch (freq) { case 11289600: case 12000000: case 12288000: case 16934400: case 18432000: wm8940->sysclk = freq; return 0; } return -EINVAL; } static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai, int div_id, int div) { struct snd_soc_codec *codec = codec_dai->codec; u16 reg; int ret = 0; switch (div_id) { case WM8940_BCLKDIV: reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3; ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2)); break; case WM8940_MCLKDIV: reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F; ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5)); break; case WM8940_OPCLKDIV: reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF; ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4)); break; } return ret; } #define WM8940_RATES SNDRV_PCM_RATE_8000_48000 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 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 wm8940_dai_ops = { .hw_params = wm8940_i2s_hw_params, .set_sysclk = wm8940_set_dai_sysclk, .digital_mute = wm8940_mute, .set_fmt = wm8940_set_dai_fmt, .set_clkdiv = wm8940_set_dai_clkdiv, .set_pll = wm8940_set_dai_pll, }; struct snd_soc_dai wm8940_dai = { .name = "WM8940", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 2, .rates = WM8940_RATES, .formats = WM8940_FORMATS, }, .capture = { .stream_name = "Capture", .channels_min = 1, .channels_max = 2, .rates = WM8940_RATES, .formats = WM8940_FORMATS, }, .ops = &wm8940_dai_ops, .symmetric_rates = 1, }; EXPORT_SYMBOL_GPL(wm8940_dai); static int wm8940_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; return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); } static int wm8940_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; int i; int ret; u8 data[3]; u16 *cache = codec->reg_cache; /* Sync reg_cache with the hardware * Could use auto incremented writes to speed this up */ for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) { data[0] = i; data[1] = (cache[i] & 0xFF00) >> 8; data[2] = cache[i] & 0x00FF; ret = codec->hw_write(codec->control_data, data, 3); if (ret < 0) goto error_ret; else if (ret != 3) { ret = -EIO; goto error_ret; } } ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); if (ret) goto error_ret; ret = wm8940_set_bias_level(codec, codec->suspend_bias_level); error_ret: return ret; } static struct snd_soc_codec *wm8940_codec; static int wm8940_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec; int ret = 0; if (wm8940_codec == NULL) { dev_err(&pdev->dev, "Codec device not registered\n"); return -ENODEV; } socdev->card->codec = wm8940_codec; codec = wm8940_codec; mutex_init(&codec->mutex); /* 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; } ret = snd_soc_add_controls(codec, wm8940_snd_controls, ARRAY_SIZE(wm8940_snd_controls)); if (ret) goto error_free_pcms; ret = wm8940_add_widgets(codec); if (ret) goto error_free_pcms; return ret; error_free_pcms: snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); pcm_err: return ret; } static int wm8940_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_wm8940 = { .probe = wm8940_probe, .remove = wm8940_remove, .suspend = wm8940_suspend, .resume = wm8940_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940); static int wm8940_register(struct wm8940_priv *wm8940, enum snd_soc_control_type control) { struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data; struct snd_soc_codec *codec = &wm8940->codec; int ret; u16 reg; if (wm8940_codec) { dev_err(codec->dev, "Another WM8940 is registered\n"); return -EINVAL; } INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); codec->private_data = wm8940; codec->name = "WM8940"; codec->owner = THIS_MODULE; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = wm8940_set_bias_level; codec->dai = &wm8940_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults); codec->reg_cache = &wm8940->reg_cache; 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); return ret; } memcpy(codec->reg_cache, wm8940_reg_defaults, sizeof(wm8940_reg_defaults)); ret = wm8940_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset\n"); return ret; } wm8940_dai.dev = codec->dev; wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); ret = snd_soc_write(codec, WM8940_POWER1, 0x180); if (ret < 0) return ret; if (!pdata) dev_warn(codec->dev, "No platform data supplied\n"); else { reg = snd_soc_read(codec, WM8940_OUTPUTCTL); ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); if (ret < 0) return ret; } wm8940_codec = codec; ret = snd_soc_register_codec(codec); if (ret) { dev_err(codec->dev, "Failed to register codec: %d\n", ret); return ret; } ret = snd_soc_register_dai(&wm8940_dai); if (ret) { dev_err(codec->dev, "Failed to register DAI: %d\n", ret); snd_soc_unregister_codec(codec); return ret; } return 0; } static void wm8940_unregister(struct wm8940_priv *wm8940) { wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF); snd_soc_unregister_dai(&wm8940_dai); snd_soc_unregister_codec(&wm8940->codec); kfree(wm8940); wm8940_codec = NULL; } static int wm8940_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8940_priv *wm8940; struct snd_soc_codec *codec; wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL); if (wm8940 == NULL) return -ENOMEM; codec = &wm8940->codec; codec->hw_write = (hw_write_t)i2c_master_send; i2c_set_clientdata(i2c, wm8940); codec->control_data = i2c; codec->dev = &i2c->dev; return wm8940_register(wm8940, SND_SOC_I2C); } static int __devexit wm8940_i2c_remove(struct i2c_client *client) { struct wm8940_priv *wm8940 = i2c_get_clientdata(client); wm8940_unregister(wm8940); return 0; } static const struct i2c_device_id wm8940_i2c_id[] = { { "wm8940", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); static struct i2c_driver wm8940_i2c_driver = { .driver = { .name = "WM8940 I2C Codec", .owner = THIS_MODULE, }, .probe = wm8940_i2c_probe, .remove = __devexit_p(wm8940_i2c_remove), .id_table = wm8940_i2c_id, }; static int __init wm8940_modinit(void) { int ret; ret = i2c_add_driver(&wm8940_i2c_driver); if (ret) printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n", ret); return ret; } module_init(wm8940_modinit); static void __exit wm8940_exit(void) { i2c_del_driver(&wm8940_i2c_driver); } module_exit(wm8940_exit); MODULE_DESCRIPTION("ASoC WM8940 driver"); MODULE_AUTHOR("Jonathan Cameron"); MODULE_LICENSE("GPL");