/* * wm8955.c -- WM8955 ALSA SoC Audio driver * * Copyright 2009 Wolfson Microelectronics plc * * Author: Mark Brown * * 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 #include "wm8955.h" #define WM8955_NUM_SUPPLIES 4 static const char *wm8955_supply_names[WM8955_NUM_SUPPLIES] = { "DCVDD", "DBVDD", "HPVDD", "AVDD", }; /* codec private data */ struct wm8955_priv { enum snd_soc_control_type control_type; unsigned int mclk_rate; int deemph; int fs; struct regulator_bulk_data supplies[WM8955_NUM_SUPPLIES]; }; static const u16 wm8955_reg[WM8955_MAX_REGISTER + 1] = { 0x0000, /* R0 */ 0x0000, /* R1 */ 0x0079, /* R2 - LOUT1 volume */ 0x0079, /* R3 - ROUT1 volume */ 0x0000, /* R4 */ 0x0008, /* R5 - DAC Control */ 0x0000, /* R6 */ 0x000A, /* R7 - Audio Interface */ 0x0000, /* R8 - Sample Rate */ 0x0000, /* R9 */ 0x00FF, /* R10 - Left DAC volume */ 0x00FF, /* R11 - Right DAC volume */ 0x000F, /* R12 - Bass control */ 0x000F, /* R13 - Treble control */ 0x0000, /* R14 */ 0x0000, /* R15 - Reset */ 0x0000, /* R16 */ 0x0000, /* R17 */ 0x0000, /* R18 */ 0x0000, /* R19 */ 0x0000, /* R20 */ 0x0000, /* R21 */ 0x0000, /* R22 */ 0x00C1, /* R23 - Additional control (1) */ 0x0000, /* R24 - Additional control (2) */ 0x0000, /* R25 - Power Management (1) */ 0x0000, /* R26 - Power Management (2) */ 0x0000, /* R27 - Additional Control (3) */ 0x0000, /* R28 */ 0x0000, /* R29 */ 0x0000, /* R30 */ 0x0000, /* R31 */ 0x0000, /* R32 */ 0x0000, /* R33 */ 0x0050, /* R34 - Left out Mix (1) */ 0x0050, /* R35 - Left out Mix (2) */ 0x0050, /* R36 - Right out Mix (1) */ 0x0050, /* R37 - Right Out Mix (2) */ 0x0050, /* R38 - Mono out Mix (1) */ 0x0050, /* R39 - Mono out Mix (2) */ 0x0079, /* R40 - LOUT2 volume */ 0x0079, /* R41 - ROUT2 volume */ 0x0079, /* R42 - MONOOUT volume */ 0x0000, /* R43 - Clocking / PLL */ 0x0103, /* R44 - PLL Control 1 */ 0x0024, /* R45 - PLL Control 2 */ 0x01BA, /* R46 - PLL Control 3 */ 0x0000, /* R47 */ 0x0000, /* R48 */ 0x0000, /* R49 */ 0x0000, /* R50 */ 0x0000, /* R51 */ 0x0000, /* R52 */ 0x0000, /* R53 */ 0x0000, /* R54 */ 0x0000, /* R55 */ 0x0000, /* R56 */ 0x0000, /* R57 */ 0x0000, /* R58 */ 0x0000, /* R59 - PLL Control 4 */ }; static int wm8955_reset(struct snd_soc_codec *codec) { return snd_soc_write(codec, WM8955_RESET, 0); } struct pll_factors { int n; int k; int outdiv; }; /* The size in bits of the FLL divide multiplied by 10 * to allow rounding later */ #define FIXED_FLL_SIZE ((1 << 22) * 10) static int wm8995_pll_factors(struct device *dev, int Fref, int Fout, struct pll_factors *pll) { u64 Kpart; unsigned int K, Ndiv, Nmod, target; dev_dbg(dev, "Fref=%u Fout=%u\n", Fref, Fout); /* The oscilator should run at should be 90-100MHz, and * there's a divide by 4 plus an optional divide by 2 in the * output path to generate the system clock. The clock table * is sortd so we should always generate a suitable target. */ target = Fout * 4; if (target < 90000000) { pll->outdiv = 1; target *= 2; } else { pll->outdiv = 0; } WARN_ON(target < 90000000 || target > 100000000); dev_dbg(dev, "Fvco=%dHz\n", target); /* Now, calculate N.K */ Ndiv = target / Fref; pll->n = Ndiv; Nmod = target % Fref; dev_dbg(dev, "Nmod=%d\n", Nmod); /* Calculate fractional part - scale up so we can round. */ Kpart = FIXED_FLL_SIZE * (long long)Nmod; do_div(Kpart, Fref); K = Kpart & 0xFFFFFFFF; if ((K % 10) >= 5) K += 5; /* Move down to proper range now rounding is done */ pll->k = K / 10; dev_dbg(dev, "N=%x K=%x OUTDIV=%x\n", pll->n, pll->k, pll->outdiv); return 0; } /* Lookup table specifying SRATE (table 25 in datasheet); some of the * output frequencies have been rounded to the standard frequencies * they are intended to match where the error is slight. */ static struct { int mclk; int fs; int usb; int sr; } clock_cfgs[] = { { 18432000, 8000, 0, 3, }, { 18432000, 12000, 0, 9, }, { 18432000, 16000, 0, 11, }, { 18432000, 24000, 0, 29, }, { 18432000, 32000, 0, 13, }, { 18432000, 48000, 0, 1, }, { 18432000, 96000, 0, 15, }, { 16934400, 8018, 0, 19, }, { 16934400, 11025, 0, 25, }, { 16934400, 22050, 0, 27, }, { 16934400, 44100, 0, 17, }, { 16934400, 88200, 0, 31, }, { 12000000, 8000, 1, 2, }, { 12000000, 11025, 1, 25, }, { 12000000, 12000, 1, 8, }, { 12000000, 16000, 1, 10, }, { 12000000, 22050, 1, 27, }, { 12000000, 24000, 1, 28, }, { 12000000, 32000, 1, 12, }, { 12000000, 44100, 1, 17, }, { 12000000, 48000, 1, 0, }, { 12000000, 88200, 1, 31, }, { 12000000, 96000, 1, 14, }, { 12288000, 8000, 0, 2, }, { 12288000, 12000, 0, 8, }, { 12288000, 16000, 0, 10, }, { 12288000, 24000, 0, 28, }, { 12288000, 32000, 0, 12, }, { 12288000, 48000, 0, 0, }, { 12288000, 96000, 0, 14, }, { 12289600, 8018, 0, 18, }, { 12289600, 11025, 0, 24, }, { 12289600, 22050, 0, 26, }, { 11289600, 44100, 0, 16, }, { 11289600, 88200, 0, 31, }, }; static int wm8955_configure_clocking(struct snd_soc_codec *codec) { struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); int i, ret, val; int clocking = 0; int srate = 0; int sr = -1; struct pll_factors pll; /* If we're not running a sample rate currently just pick one */ if (wm8955->fs == 0) wm8955->fs = 8000; /* Can we generate an exact output? */ for (i = 0; i < ARRAY_SIZE(clock_cfgs); i++) { if (wm8955->fs != clock_cfgs[i].fs) continue; sr = i; if (wm8955->mclk_rate == clock_cfgs[i].mclk) break; } /* We should never get here with an unsupported sample rate */ if (sr == -1) { dev_err(codec->dev, "Sample rate %dHz unsupported\n", wm8955->fs); WARN_ON(sr == -1); return -EINVAL; } if (i == ARRAY_SIZE(clock_cfgs)) { /* If we can't generate the right clock from MCLK then * we should configure the PLL to supply us with an * appropriate clock. */ clocking |= WM8955_MCLKSEL; /* Use the last divider configuration we saw for the * sample rate. */ ret = wm8995_pll_factors(codec->dev, wm8955->mclk_rate, clock_cfgs[sr].mclk, &pll); if (ret != 0) { dev_err(codec->dev, "Unable to generate %dHz from %dHz MCLK\n", wm8955->fs, wm8955->mclk_rate); return -EINVAL; } snd_soc_update_bits(codec, WM8955_PLL_CONTROL_1, WM8955_N_MASK | WM8955_K_21_18_MASK, (pll.n << WM8955_N_SHIFT) | pll.k >> 18); snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2, WM8955_K_17_9_MASK, (pll.k >> 9) & WM8955_K_17_9_MASK); snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2, WM8955_K_8_0_MASK, pll.k & WM8955_K_8_0_MASK); if (pll.k) snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4, WM8955_KEN, WM8955_KEN); else snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4, WM8955_KEN, 0); if (pll.outdiv) val = WM8955_PLL_RB | WM8955_PLLOUTDIV2; else val = WM8955_PLL_RB; /* Now start the PLL running */ snd_soc_update_bits(codec, WM8955_CLOCKING_PLL, WM8955_PLL_RB | WM8955_PLLOUTDIV2, val); snd_soc_update_bits(codec, WM8955_CLOCKING_PLL, WM8955_PLLEN, WM8955_PLLEN); } srate = clock_cfgs[sr].usb | (clock_cfgs[sr].sr << WM8955_SR_SHIFT); snd_soc_update_bits(codec, WM8955_SAMPLE_RATE, WM8955_USB | WM8955_SR_MASK, srate); snd_soc_update_bits(codec, WM8955_CLOCKING_PLL, WM8955_MCLKSEL, clocking); return 0; } static int wm8955_sysclk(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_codec *codec = w->codec; int ret = 0; /* Always disable the clocks - if we're doing reconfiguration this * avoids misclocking. */ snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1, WM8955_DIGENB, 0); snd_soc_update_bits(codec, WM8955_CLOCKING_PLL, WM8955_PLL_RB | WM8955_PLLEN, 0); switch (event) { case SND_SOC_DAPM_POST_PMD: break; case SND_SOC_DAPM_PRE_PMU: ret = wm8955_configure_clocking(codec); break; default: ret = -EINVAL; break; } return ret; } static int deemph_settings[] = { 0, 32000, 44100, 48000 }; static int wm8955_set_deemph(struct snd_soc_codec *codec) { struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); int val, i, best; /* If we're using deemphasis select the nearest available sample * rate. */ if (wm8955->deemph) { best = 1; for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) { if (abs(deemph_settings[i] - wm8955->fs) < abs(deemph_settings[best] - wm8955->fs)) best = i; } val = best << WM8955_DEEMPH_SHIFT; } else { val = 0; } dev_dbg(codec->dev, "Set deemphasis %d\n", val); return snd_soc_update_bits(codec, WM8955_DAC_CONTROL, WM8955_DEEMPH_MASK, val); } static int wm8955_get_deemph(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); ucontrol->value.enumerated.item[0] = wm8955->deemph; return 0; } static int wm8955_put_deemph(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); int deemph = ucontrol->value.enumerated.item[0]; if (deemph > 1) return -EINVAL; wm8955->deemph = deemph; return wm8955_set_deemph(codec); } static const char *bass_mode_text[] = { "Linear", "Adaptive", }; static const struct soc_enum bass_mode = SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 7, 2, bass_mode_text); static const char *bass_cutoff_text[] = { "Low", "High" }; static const struct soc_enum bass_cutoff = SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 6, 2, bass_cutoff_text); static const char *treble_cutoff_text[] = { "High", "Low" }; static const struct soc_enum treble_cutoff = SOC_ENUM_SINGLE(WM8955_TREBLE_CONTROL, 6, 2, treble_cutoff_text); static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); static const DECLARE_TLV_DB_SCALE(atten_tlv, -600, 600, 0); static const DECLARE_TLV_DB_SCALE(bypass_tlv, -1500, 300, 0); static const DECLARE_TLV_DB_SCALE(mono_tlv, -2100, 300, 0); static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); static const DECLARE_TLV_DB_SCALE(treble_tlv, -1200, 150, 1); static const struct snd_kcontrol_new wm8955_snd_controls[] = { SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8955_LEFT_DAC_VOLUME, WM8955_RIGHT_DAC_VOLUME, 0, 255, 0, digital_tlv), SOC_SINGLE_TLV("Playback Attenuation Volume", WM8955_DAC_CONTROL, 7, 1, 1, atten_tlv), SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0, wm8955_get_deemph, wm8955_put_deemph), SOC_ENUM("Bass Mode", bass_mode), SOC_ENUM("Bass Cutoff", bass_cutoff), SOC_SINGLE("Bass Volume", WM8955_BASS_CONTROL, 0, 15, 1), SOC_ENUM("Treble Cutoff", treble_cutoff), SOC_SINGLE_TLV("Treble Volume", WM8955_TREBLE_CONTROL, 0, 14, 1, treble_tlv), SOC_SINGLE_TLV("Left Bypass Volume", WM8955_LEFT_OUT_MIX_1, 4, 7, 1, bypass_tlv), SOC_SINGLE_TLV("Left Mono Volume", WM8955_LEFT_OUT_MIX_2, 4, 7, 1, bypass_tlv), SOC_SINGLE_TLV("Right Mono Volume", WM8955_RIGHT_OUT_MIX_1, 4, 7, 1, bypass_tlv), SOC_SINGLE_TLV("Right Bypass Volume", WM8955_RIGHT_OUT_MIX_2, 4, 7, 1, bypass_tlv), /* Not a stereo pair so they line up with the DAPM switches */ SOC_SINGLE_TLV("Mono Left Bypass Volume", WM8955_MONO_OUT_MIX_1, 4, 7, 1, mono_tlv), SOC_SINGLE_TLV("Mono Right Bypass Volume", WM8955_MONO_OUT_MIX_2, 4, 7, 1, mono_tlv), SOC_DOUBLE_R_TLV("Headphone Volume", WM8955_LOUT1_VOLUME, WM8955_ROUT1_VOLUME, 0, 127, 0, out_tlv), SOC_DOUBLE_R("Headphone ZC Switch", WM8955_LOUT1_VOLUME, WM8955_ROUT1_VOLUME, 7, 1, 0), SOC_DOUBLE_R_TLV("Speaker Volume", WM8955_LOUT2_VOLUME, WM8955_ROUT2_VOLUME, 0, 127, 0, out_tlv), SOC_DOUBLE_R("Speaker ZC Switch", WM8955_LOUT2_VOLUME, WM8955_ROUT2_VOLUME, 7, 1, 0), SOC_SINGLE_TLV("Mono Volume", WM8955_MONOOUT_VOLUME, 0, 127, 0, out_tlv), SOC_SINGLE("Mono ZC Switch", WM8955_MONOOUT_VOLUME, 7, 1, 0), }; static const struct snd_kcontrol_new lmixer[] = { SOC_DAPM_SINGLE("Playback Switch", WM8955_LEFT_OUT_MIX_1, 8, 1, 0), SOC_DAPM_SINGLE("Bypass Switch", WM8955_LEFT_OUT_MIX_1, 7, 1, 0), SOC_DAPM_SINGLE("Right Playback Switch", WM8955_LEFT_OUT_MIX_2, 8, 1, 0), SOC_DAPM_SINGLE("Mono Switch", WM8955_LEFT_OUT_MIX_2, 7, 1, 0), }; static const struct snd_kcontrol_new rmixer[] = { SOC_DAPM_SINGLE("Left Playback Switch", WM8955_RIGHT_OUT_MIX_1, 8, 1, 0), SOC_DAPM_SINGLE("Mono Switch", WM8955_RIGHT_OUT_MIX_1, 7, 1, 0), SOC_DAPM_SINGLE("Playback Switch", WM8955_RIGHT_OUT_MIX_2, 8, 1, 0), SOC_DAPM_SINGLE("Bypass Switch", WM8955_RIGHT_OUT_MIX_2, 7, 1, 0), }; static const struct snd_kcontrol_new mmixer[] = { SOC_DAPM_SINGLE("Left Playback Switch", WM8955_MONO_OUT_MIX_1, 8, 1, 0), SOC_DAPM_SINGLE("Left Bypass Switch", WM8955_MONO_OUT_MIX_1, 7, 1, 0), SOC_DAPM_SINGLE("Right Playback Switch", WM8955_MONO_OUT_MIX_2, 8, 1, 0), SOC_DAPM_SINGLE("Right Bypass Switch", WM8955_MONO_OUT_MIX_2, 7, 1, 0), }; static const struct snd_soc_dapm_widget wm8955_dapm_widgets[] = { SND_SOC_DAPM_INPUT("MONOIN-"), SND_SOC_DAPM_INPUT("MONOIN+"), SND_SOC_DAPM_INPUT("LINEINR"), SND_SOC_DAPM_INPUT("LINEINL"), SND_SOC_DAPM_PGA("Mono Input", SND_SOC_NOPM, 0, 0, NULL, 0), SND_SOC_DAPM_SUPPLY("SYSCLK", WM8955_POWER_MANAGEMENT_1, 0, 1, wm8955_sysclk, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), SND_SOC_DAPM_SUPPLY("TSDEN", WM8955_ADDITIONAL_CONTROL_1, 8, 0, NULL, 0), SND_SOC_DAPM_DAC("DACL", "Playback", WM8955_POWER_MANAGEMENT_2, 8, 0), SND_SOC_DAPM_DAC("DACR", "Playback", WM8955_POWER_MANAGEMENT_2, 7, 0), SND_SOC_DAPM_PGA("LOUT1 PGA", WM8955_POWER_MANAGEMENT_2, 6, 0, NULL, 0), SND_SOC_DAPM_PGA("ROUT1 PGA", WM8955_POWER_MANAGEMENT_2, 5, 0, NULL, 0), SND_SOC_DAPM_PGA("LOUT2 PGA", WM8955_POWER_MANAGEMENT_2, 4, 0, NULL, 0), SND_SOC_DAPM_PGA("ROUT2 PGA", WM8955_POWER_MANAGEMENT_2, 3, 0, NULL, 0), SND_SOC_DAPM_PGA("MOUT PGA", WM8955_POWER_MANAGEMENT_2, 2, 0, NULL, 0), SND_SOC_DAPM_PGA("OUT3 PGA", WM8955_POWER_MANAGEMENT_2, 1, 0, NULL, 0), /* The names are chosen to make the control names nice */ SND_SOC_DAPM_MIXER("Left", SND_SOC_NOPM, 0, 0, lmixer, ARRAY_SIZE(lmixer)), SND_SOC_DAPM_MIXER("Right", SND_SOC_NOPM, 0, 0, rmixer, ARRAY_SIZE(rmixer)), SND_SOC_DAPM_MIXER("Mono", SND_SOC_NOPM, 0, 0, mmixer, ARRAY_SIZE(mmixer)), SND_SOC_DAPM_OUTPUT("LOUT1"), SND_SOC_DAPM_OUTPUT("ROUT1"), SND_SOC_DAPM_OUTPUT("LOUT2"), SND_SOC_DAPM_OUTPUT("ROUT2"), SND_SOC_DAPM_OUTPUT("MONOOUT"), SND_SOC_DAPM_OUTPUT("OUT3"), }; static const struct snd_soc_dapm_route wm8955_intercon[] = { { "DACL", NULL, "SYSCLK" }, { "DACR", NULL, "SYSCLK" }, { "Mono Input", NULL, "MONOIN-" }, { "Mono Input", NULL, "MONOIN+" }, { "Left", "Playback Switch", "DACL" }, { "Left", "Right Playback Switch", "DACR" }, { "Left", "Bypass Switch", "LINEINL" }, { "Left", "Mono Switch", "Mono Input" }, { "Right", "Playback Switch", "DACR" }, { "Right", "Left Playback Switch", "DACL" }, { "Right", "Bypass Switch", "LINEINR" }, { "Right", "Mono Switch", "Mono Input" }, { "Mono", "Left Playback Switch", "DACL" }, { "Mono", "Right Playback Switch", "DACR" }, { "Mono", "Left Bypass Switch", "LINEINL" }, { "Mono", "Right Bypass Switch", "LINEINR" }, { "LOUT1 PGA", NULL, "Left" }, { "LOUT1", NULL, "TSDEN" }, { "LOUT1", NULL, "LOUT1 PGA" }, { "ROUT1 PGA", NULL, "Right" }, { "ROUT1", NULL, "TSDEN" }, { "ROUT1", NULL, "ROUT1 PGA" }, { "LOUT2 PGA", NULL, "Left" }, { "LOUT2", NULL, "TSDEN" }, { "LOUT2", NULL, "LOUT2 PGA" }, { "ROUT2 PGA", NULL, "Right" }, { "ROUT2", NULL, "TSDEN" }, { "ROUT2", NULL, "ROUT2 PGA" }, { "MOUT PGA", NULL, "Mono" }, { "MONOOUT", NULL, "MOUT PGA" }, /* OUT3 not currently implemented */ { "OUT3", NULL, "OUT3 PGA" }, }; static int wm8955_add_widgets(struct snd_soc_codec *codec) { struct snd_soc_dapm_context *dapm = &codec->dapm; snd_soc_add_controls(codec, wm8955_snd_controls, ARRAY_SIZE(wm8955_snd_controls)); snd_soc_dapm_new_controls(dapm, wm8955_dapm_widgets, ARRAY_SIZE(wm8955_dapm_widgets)); snd_soc_dapm_add_routes(dapm, wm8955_intercon, ARRAY_SIZE(wm8955_intercon)); return 0; } static int wm8955_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); int ret; int wl; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: wl = 0; break; case SNDRV_PCM_FORMAT_S20_3LE: wl = 0x4; break; case SNDRV_PCM_FORMAT_S24_LE: wl = 0x8; break; case SNDRV_PCM_FORMAT_S32_LE: wl = 0xc; break; default: return -EINVAL; } snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE, WM8955_WL_MASK, wl); wm8955->fs = params_rate(params); wm8955_set_deemph(codec); /* If the chip is clocked then disable the clocks and force a * reconfiguration, otherwise DAPM will power up the * clocks for us later. */ ret = snd_soc_read(codec, WM8955_POWER_MANAGEMENT_1); if (ret < 0) return ret; if (ret & WM8955_DIGENB) { snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1, WM8955_DIGENB, 0); snd_soc_update_bits(codec, WM8955_CLOCKING_PLL, WM8955_PLL_RB | WM8955_PLLEN, 0); wm8955_configure_clocking(codec); } return 0; } static int wm8955_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = dai->codec; struct wm8955_priv *priv = snd_soc_codec_get_drvdata(codec); int div; switch (clk_id) { case WM8955_CLK_MCLK: if (freq > 15000000) { priv->mclk_rate = freq /= 2; div = WM8955_MCLKDIV2; } else { priv->mclk_rate = freq; div = 0; } snd_soc_update_bits(codec, WM8955_SAMPLE_RATE, WM8955_MCLKDIV2, div); break; default: return -EINVAL; } dev_dbg(dai->dev, "Clock source is %d at %uHz\n", clk_id, freq); return 0; } static int wm8955_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct snd_soc_codec *codec = dai->codec; u16 aif = 0; switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: break; case SND_SOC_DAIFMT_CBM_CFM: aif |= WM8955_MS; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_DSP_B: aif |= WM8955_LRP; case SND_SOC_DAIFMT_DSP_A: aif |= 0x3; break; case SND_SOC_DAIFMT_I2S: aif |= 0x2; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: aif |= 0x1; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_DSP_A: case SND_SOC_DAIFMT_DSP_B: /* frame inversion not valid for DSP modes */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_NF: aif |= WM8955_BCLKINV; break; default: return -EINVAL; } break; case SND_SOC_DAIFMT_I2S: case SND_SOC_DAIFMT_RIGHT_J: case SND_SOC_DAIFMT_LEFT_J: switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_IF: aif |= WM8955_BCLKINV | WM8955_LRP; break; case SND_SOC_DAIFMT_IB_NF: aif |= WM8955_BCLKINV; break; case SND_SOC_DAIFMT_NB_IF: aif |= WM8955_LRP; break; default: return -EINVAL; } break; default: return -EINVAL; } snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE, WM8955_MS | WM8955_FORMAT_MASK | WM8955_BCLKINV | WM8955_LRP, aif); return 0; } static int wm8955_digital_mute(struct snd_soc_dai *codec_dai, int mute) { struct snd_soc_codec *codec = codec_dai->codec; int val; if (mute) val = WM8955_DACMU; else val = 0; snd_soc_update_bits(codec, WM8955_DAC_CONTROL, WM8955_DACMU, val); return 0; } static int wm8955_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); u16 *reg_cache = codec->reg_cache; int ret, i; switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: /* VMID resistance 2*50k */ snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1, WM8955_VMIDSEL_MASK, 0x1 << WM8955_VMIDSEL_SHIFT); /* Default bias current */ snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1, WM8955_VSEL_MASK, 0x2 << WM8955_VSEL_SHIFT); break; case SND_SOC_BIAS_STANDBY: if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); return ret; } /* Sync back cached values if they're * different from the hardware default. */ for (i = 0; i < codec->driver->reg_cache_size; i++) { if (i == WM8955_RESET) continue; if (reg_cache[i] == wm8955_reg[i]) continue; snd_soc_write(codec, i, reg_cache[i]); } /* Enable VREF and VMID */ snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1, WM8955_VREF | WM8955_VMIDSEL_MASK, WM8955_VREF | 0x3 << WM8955_VREF_SHIFT); /* Let VMID ramp */ msleep(500); /* High resistance VROI to maintain outputs */ snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_3, WM8955_VROI, WM8955_VROI); } /* Maintain VMID with 2*250k */ snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1, WM8955_VMIDSEL_MASK, 0x2 << WM8955_VMIDSEL_SHIFT); /* Minimum bias current */ snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1, WM8955_VSEL_MASK, 0); break; case SND_SOC_BIAS_OFF: /* Low resistance VROI to help discharge */ snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_3, WM8955_VROI, 0); /* Turn off VMID and VREF */ snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1, WM8955_VREF | WM8955_VMIDSEL_MASK, 0); regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); break; } codec->dapm.bias_level = level; return 0; } #define WM8955_RATES SNDRV_PCM_RATE_8000_96000 #define WM8955_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 wm8955_dai_ops = { .set_sysclk = wm8955_set_sysclk, .set_fmt = wm8955_set_fmt, .hw_params = wm8955_hw_params, .digital_mute = wm8955_digital_mute, }; static struct snd_soc_dai_driver wm8955_dai = { .name = "wm8955-hifi", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = WM8955_RATES, .formats = WM8955_FORMATS, }, .ops = &wm8955_dai_ops, }; #ifdef CONFIG_PM static int wm8955_suspend(struct snd_soc_codec *codec, pm_message_t state) { wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8955_resume(struct snd_soc_codec *codec) { wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY); return 0; } #else #define wm8955_suspend NULL #define wm8955_resume NULL #endif static int wm8955_probe(struct snd_soc_codec *codec) { struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); struct wm8955_pdata *pdata = dev_get_platdata(codec->dev); u16 *reg_cache = codec->reg_cache; int ret, i; ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8955->control_type); if (ret != 0) { dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); return ret; } for (i = 0; i < ARRAY_SIZE(wm8955->supplies); i++) wm8955->supplies[i].supply = wm8955_supply_names[i]; ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8955->supplies), wm8955->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to request supplies: %d\n", ret); return ret; } ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); goto err_get; } ret = wm8955_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset: %d\n", ret); goto err_enable; } /* Change some default settings - latch VU and enable ZC */ snd_soc_update_bits(codec, WM8955_LEFT_DAC_VOLUME, WM8955_LDVU, WM8955_LDVU); snd_soc_update_bits(codec, WM8955_RIGHT_DAC_VOLUME, WM8955_RDVU, WM8955_RDVU); snd_soc_update_bits(codec, WM8955_LOUT1_VOLUME, WM8955_LO1VU | WM8955_LO1ZC, WM8955_LO1VU | WM8955_LO1ZC); snd_soc_update_bits(codec, WM8955_ROUT1_VOLUME, WM8955_RO1VU | WM8955_RO1ZC, WM8955_RO1VU | WM8955_RO1ZC); snd_soc_update_bits(codec, WM8955_LOUT2_VOLUME, WM8955_LO2VU | WM8955_LO2ZC, WM8955_LO2VU | WM8955_LO2ZC); snd_soc_update_bits(codec, WM8955_ROUT2_VOLUME, WM8955_RO2VU | WM8955_RO2ZC, WM8955_RO2VU | WM8955_RO2ZC); snd_soc_update_bits(codec, WM8955_MONOOUT_VOLUME, WM8955_MOZC, WM8955_MOZC); /* Also enable adaptive bass boost by default */ snd_soc_update_bits(codec, WM8955_BASS_CONTROL, WM8955_BB, WM8955_BB); /* Set platform data values */ if (pdata) { if (pdata->out2_speaker) reg_cache[WM8955_ADDITIONAL_CONTROL_2] |= WM8955_ROUT2INV; if (pdata->monoin_diff) reg_cache[WM8955_MONO_OUT_MIX_1] |= WM8955_DMEN; } wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY); /* Bias level configuration will have done an extra enable */ regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); wm8955_add_widgets(codec); return 0; err_enable: regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); err_get: regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); return ret; } static int wm8955_remove(struct snd_soc_codec *codec) { struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF); regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); return 0; } static struct snd_soc_codec_driver soc_codec_dev_wm8955 = { .probe = wm8955_probe, .remove = wm8955_remove, .suspend = wm8955_suspend, .resume = wm8955_resume, .set_bias_level = wm8955_set_bias_level, .reg_cache_size = ARRAY_SIZE(wm8955_reg), .reg_word_size = sizeof(u16), .reg_cache_default = wm8955_reg, }; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) static __devinit int wm8955_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8955_priv *wm8955; int ret; wm8955 = kzalloc(sizeof(struct wm8955_priv), GFP_KERNEL); if (wm8955 == NULL) return -ENOMEM; i2c_set_clientdata(i2c, wm8955); wm8955->control_type = SND_SOC_I2C; ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8955, &wm8955_dai, 1); if (ret < 0) kfree(wm8955); return ret; } static __devexit int wm8955_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); kfree(i2c_get_clientdata(client)); return 0; } static const struct i2c_device_id wm8955_i2c_id[] = { { "wm8955", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8955_i2c_id); static struct i2c_driver wm8955_i2c_driver = { .driver = { .name = "wm8955-codec", .owner = THIS_MODULE, }, .probe = wm8955_i2c_probe, .remove = __devexit_p(wm8955_i2c_remove), .id_table = wm8955_i2c_id, }; #endif static int __init wm8955_modinit(void) { int ret = 0; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) ret = i2c_add_driver(&wm8955_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register WM8955 I2C driver: %d\n", ret); } #endif return ret; } module_init(wm8955_modinit); static void __exit wm8955_exit(void) { #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) i2c_del_driver(&wm8955_i2c_driver); #endif } module_exit(wm8955_exit); MODULE_DESCRIPTION("ASoC WM8955 driver"); MODULE_AUTHOR("Mark Brown "); MODULE_LICENSE("GPL");