diff options
Diffstat (limited to 'sound/soc/codecs/wm8955.c')
| -rw-r--r-- | sound/soc/codecs/wm8955.c | 1014 |
1 files changed, 1014 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8955.c b/sound/soc/codecs/wm8955.c new file mode 100644 index 000000000..05ef45672 --- /dev/null +++ b/sound/soc/codecs/wm8955.c @@ -0,0 +1,1014 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * wm8955.c -- WM8955 ALSA SoC Audio driver + * + * Copyright 2009 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + */ + +#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/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/initval.h> +#include <sound/tlv.h> +#include <sound/wm8955.h> + +#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 { + struct regmap *regmap; + + unsigned int mclk_rate; + + int deemph; + int fs; + + struct regulator_bulk_data supplies[WM8955_NUM_SUPPLIES]; +}; + +static const struct reg_default wm8955_reg_defaults[] = { + { 2, 0x0079 }, /* R2 - LOUT1 volume */ + { 3, 0x0079 }, /* R3 - ROUT1 volume */ + { 5, 0x0008 }, /* R5 - DAC Control */ + { 7, 0x000A }, /* R7 - Audio Interface */ + { 8, 0x0000 }, /* R8 - Sample Rate */ + { 10, 0x00FF }, /* R10 - Left DAC volume */ + { 11, 0x00FF }, /* R11 - Right DAC volume */ + { 12, 0x000F }, /* R12 - Bass control */ + { 13, 0x000F }, /* R13 - Treble control */ + { 23, 0x00C1 }, /* R23 - Additional control (1) */ + { 24, 0x0000 }, /* R24 - Additional control (2) */ + { 25, 0x0000 }, /* R25 - Power Management (1) */ + { 26, 0x0000 }, /* R26 - Power Management (2) */ + { 27, 0x0000 }, /* R27 - Additional Control (3) */ + { 34, 0x0050 }, /* R34 - Left out Mix (1) */ + { 35, 0x0050 }, /* R35 - Left out Mix (2) */ + { 36, 0x0050 }, /* R36 - Right out Mix (1) */ + { 37, 0x0050 }, /* R37 - Right Out Mix (2) */ + { 38, 0x0050 }, /* R38 - Mono out Mix (1) */ + { 39, 0x0050 }, /* R39 - Mono out Mix (2) */ + { 40, 0x0079 }, /* R40 - LOUT2 volume */ + { 41, 0x0079 }, /* R41 - ROUT2 volume */ + { 42, 0x0079 }, /* R42 - MONOOUT volume */ + { 43, 0x0000 }, /* R43 - Clocking / PLL */ + { 44, 0x0103 }, /* R44 - PLL Control 1 */ + { 45, 0x0024 }, /* R45 - PLL Control 2 */ + { 46, 0x01BA }, /* R46 - PLL Control 3 */ + { 59, 0x0000 }, /* R59 - PLL Control 4 */ +}; + +static bool wm8955_writeable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case WM8955_LOUT1_VOLUME: + case WM8955_ROUT1_VOLUME: + case WM8955_DAC_CONTROL: + case WM8955_AUDIO_INTERFACE: + case WM8955_SAMPLE_RATE: + case WM8955_LEFT_DAC_VOLUME: + case WM8955_RIGHT_DAC_VOLUME: + case WM8955_BASS_CONTROL: + case WM8955_TREBLE_CONTROL: + case WM8955_RESET: + case WM8955_ADDITIONAL_CONTROL_1: + case WM8955_ADDITIONAL_CONTROL_2: + case WM8955_POWER_MANAGEMENT_1: + case WM8955_POWER_MANAGEMENT_2: + case WM8955_ADDITIONAL_CONTROL_3: + case WM8955_LEFT_OUT_MIX_1: + case WM8955_LEFT_OUT_MIX_2: + case WM8955_RIGHT_OUT_MIX_1: + case WM8955_RIGHT_OUT_MIX_2: + case WM8955_MONO_OUT_MIX_1: + case WM8955_MONO_OUT_MIX_2: + case WM8955_LOUT2_VOLUME: + case WM8955_ROUT2_VOLUME: + case WM8955_MONOOUT_VOLUME: + case WM8955_CLOCKING_PLL: + case WM8955_PLL_CONTROL_1: + case WM8955_PLL_CONTROL_2: + case WM8955_PLL_CONTROL_3: + case WM8955_PLL_CONTROL_4: + return true; + default: + return false; + } +} + +static bool wm8955_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case WM8955_RESET: + return true; + default: + return false; + } +} + +static int wm8955_reset(struct snd_soc_component *component) +{ + return snd_soc_component_write(component, 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 wm8955_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_component *component) +{ + struct wm8955_priv *wm8955 = snd_soc_component_get_drvdata(component); + 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(component->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 = wm8955_pll_factors(component->dev, wm8955->mclk_rate, + clock_cfgs[sr].mclk, &pll); + if (ret != 0) { + dev_err(component->dev, + "Unable to generate %dHz from %dHz MCLK\n", + wm8955->fs, wm8955->mclk_rate); + return -EINVAL; + } + + snd_soc_component_update_bits(component, WM8955_PLL_CONTROL_1, + WM8955_N_MASK | WM8955_K_21_18_MASK, + (pll.n << WM8955_N_SHIFT) | + pll.k >> 18); + snd_soc_component_update_bits(component, WM8955_PLL_CONTROL_2, + WM8955_K_17_9_MASK, + (pll.k >> 9) & WM8955_K_17_9_MASK); + snd_soc_component_update_bits(component, WM8955_PLL_CONTROL_3, + WM8955_K_8_0_MASK, + pll.k & WM8955_K_8_0_MASK); + if (pll.k) + snd_soc_component_update_bits(component, WM8955_PLL_CONTROL_4, + WM8955_KEN, WM8955_KEN); + else + snd_soc_component_update_bits(component, 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_component_update_bits(component, WM8955_CLOCKING_PLL, + WM8955_PLL_RB | WM8955_PLLOUTDIV2, val); + snd_soc_component_update_bits(component, WM8955_CLOCKING_PLL, + WM8955_PLLEN, WM8955_PLLEN); + } + + srate = clock_cfgs[sr].usb | (clock_cfgs[sr].sr << WM8955_SR_SHIFT); + + snd_soc_component_update_bits(component, WM8955_SAMPLE_RATE, + WM8955_USB | WM8955_SR_MASK, srate); + snd_soc_component_update_bits(component, 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_component *component = snd_soc_dapm_to_component(w->dapm); + int ret = 0; + + /* Always disable the clocks - if we're doing reconfiguration this + * avoids misclocking. + */ + snd_soc_component_update_bits(component, WM8955_POWER_MANAGEMENT_1, + WM8955_DIGENB, 0); + snd_soc_component_update_bits(component, 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(component); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int deemph_settings[] = { 0, 32000, 44100, 48000 }; + +static int wm8955_set_deemph(struct snd_soc_component *component) +{ + struct wm8955_priv *wm8955 = snd_soc_component_get_drvdata(component); + 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(component->dev, "Set deemphasis %d\n", val); + + return snd_soc_component_update_bits(component, 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_component *component = snd_soc_kcontrol_component(kcontrol); + struct wm8955_priv *wm8955 = snd_soc_component_get_drvdata(component); + + ucontrol->value.integer.value[0] = wm8955->deemph; + return 0; +} + +static int wm8955_put_deemph(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); + struct wm8955_priv *wm8955 = snd_soc_component_get_drvdata(component); + unsigned int deemph = ucontrol->value.integer.value[0]; + + if (deemph > 1) + return -EINVAL; + + wm8955->deemph = deemph; + + return wm8955_set_deemph(component); +} + +static const char *bass_mode_text[] = { + "Linear", "Adaptive", +}; + +static SOC_ENUM_SINGLE_DECL(bass_mode, WM8955_BASS_CONTROL, 7, bass_mode_text); + +static const char *bass_cutoff_text[] = { + "Low", "High" +}; + +static SOC_ENUM_SINGLE_DECL(bass_cutoff, WM8955_BASS_CONTROL, 6, + bass_cutoff_text); + +static const char *treble_cutoff_text[] = { + "High", "Low" +}; + +static SOC_ENUM_SINGLE_DECL(treble_cutoff, WM8955_TREBLE_CONTROL, 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_dapm_routes[] = { + { "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_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct wm8955_priv *wm8955 = snd_soc_component_get_drvdata(component); + int ret; + int wl; + + switch (params_width(params)) { + case 16: + wl = 0; + break; + case 20: + wl = 0x4; + break; + case 24: + wl = 0x8; + break; + case 32: + wl = 0xc; + break; + default: + return -EINVAL; + } + snd_soc_component_update_bits(component, WM8955_AUDIO_INTERFACE, + WM8955_WL_MASK, wl); + + wm8955->fs = params_rate(params); + wm8955_set_deemph(component); + + /* 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_component_read(component, WM8955_POWER_MANAGEMENT_1); + if (ret < 0) + return ret; + if (ret & WM8955_DIGENB) { + snd_soc_component_update_bits(component, WM8955_POWER_MANAGEMENT_1, + WM8955_DIGENB, 0); + snd_soc_component_update_bits(component, WM8955_CLOCKING_PLL, + WM8955_PLL_RB | WM8955_PLLEN, 0); + + wm8955_configure_clocking(component); + } + + return 0; +} + + +static int wm8955_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct snd_soc_component *component = dai->component; + struct wm8955_priv *priv = snd_soc_component_get_drvdata(component); + 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_component_update_bits(component, 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_component *component = dai->component; + 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; + fallthrough; + 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_component_update_bits(component, WM8955_AUDIO_INTERFACE, + WM8955_MS | WM8955_FORMAT_MASK | WM8955_BCLKINV | + WM8955_LRP, aif); + + return 0; +} + + +static int wm8955_mute(struct snd_soc_dai *codec_dai, int mute, int direction) +{ + struct snd_soc_component *component = codec_dai->component; + int val; + + if (mute) + val = WM8955_DACMU; + else + val = 0; + + snd_soc_component_update_bits(component, WM8955_DAC_CONTROL, WM8955_DACMU, val); + + return 0; +} + +static int wm8955_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + struct wm8955_priv *wm8955 = snd_soc_component_get_drvdata(component); + int ret; + + switch (level) { + case SND_SOC_BIAS_ON: + break; + + case SND_SOC_BIAS_PREPARE: + /* VMID resistance 2*50k */ + snd_soc_component_update_bits(component, WM8955_POWER_MANAGEMENT_1, + WM8955_VMIDSEL_MASK, + 0x1 << WM8955_VMIDSEL_SHIFT); + + /* Default bias current */ + snd_soc_component_update_bits(component, WM8955_ADDITIONAL_CONTROL_1, + WM8955_VSEL_MASK, + 0x2 << WM8955_VSEL_SHIFT); + break; + + case SND_SOC_BIAS_STANDBY: + if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { + ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies), + wm8955->supplies); + if (ret != 0) { + dev_err(component->dev, + "Failed to enable supplies: %d\n", + ret); + return ret; + } + + regcache_sync(wm8955->regmap); + + /* Enable VREF and VMID */ + snd_soc_component_update_bits(component, 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_component_update_bits(component, + WM8955_ADDITIONAL_CONTROL_3, + WM8955_VROI, WM8955_VROI); + } + + /* Maintain VMID with 2*250k */ + snd_soc_component_update_bits(component, WM8955_POWER_MANAGEMENT_1, + WM8955_VMIDSEL_MASK, + 0x2 << WM8955_VMIDSEL_SHIFT); + + /* Minimum bias current */ + snd_soc_component_update_bits(component, WM8955_ADDITIONAL_CONTROL_1, + WM8955_VSEL_MASK, 0); + break; + + case SND_SOC_BIAS_OFF: + /* Low resistance VROI to help discharge */ + snd_soc_component_update_bits(component, + WM8955_ADDITIONAL_CONTROL_3, + WM8955_VROI, 0); + + /* Turn off VMID and VREF */ + snd_soc_component_update_bits(component, WM8955_POWER_MANAGEMENT_1, + WM8955_VREF | + WM8955_VMIDSEL_MASK, 0); + + regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), + wm8955->supplies); + break; + } + 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 const struct snd_soc_dai_ops wm8955_dai_ops = { + .set_sysclk = wm8955_set_sysclk, + .set_fmt = wm8955_set_fmt, + .hw_params = wm8955_hw_params, + .mute_stream = wm8955_mute, + .no_capture_mute = 1, +}; + +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, +}; + +static int wm8955_probe(struct snd_soc_component *component) +{ + struct wm8955_priv *wm8955 = snd_soc_component_get_drvdata(component); + struct wm8955_pdata *pdata = dev_get_platdata(component->dev); + int ret, i; + + for (i = 0; i < ARRAY_SIZE(wm8955->supplies); i++) + wm8955->supplies[i].supply = wm8955_supply_names[i]; + + ret = devm_regulator_bulk_get(component->dev, ARRAY_SIZE(wm8955->supplies), + wm8955->supplies); + if (ret != 0) { + dev_err(component->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(component->dev, "Failed to enable supplies: %d\n", ret); + return ret; + } + + ret = wm8955_reset(component); + if (ret < 0) { + dev_err(component->dev, "Failed to issue reset: %d\n", ret); + goto err_enable; + } + + /* Change some default settings - latch VU and enable ZC */ + snd_soc_component_update_bits(component, WM8955_LEFT_DAC_VOLUME, + WM8955_LDVU, WM8955_LDVU); + snd_soc_component_update_bits(component, WM8955_RIGHT_DAC_VOLUME, + WM8955_RDVU, WM8955_RDVU); + snd_soc_component_update_bits(component, WM8955_LOUT1_VOLUME, + WM8955_LO1VU | WM8955_LO1ZC, + WM8955_LO1VU | WM8955_LO1ZC); + snd_soc_component_update_bits(component, WM8955_ROUT1_VOLUME, + WM8955_RO1VU | WM8955_RO1ZC, + WM8955_RO1VU | WM8955_RO1ZC); + snd_soc_component_update_bits(component, WM8955_LOUT2_VOLUME, + WM8955_LO2VU | WM8955_LO2ZC, + WM8955_LO2VU | WM8955_LO2ZC); + snd_soc_component_update_bits(component, WM8955_ROUT2_VOLUME, + WM8955_RO2VU | WM8955_RO2ZC, + WM8955_RO2VU | WM8955_RO2ZC); + snd_soc_component_update_bits(component, WM8955_MONOOUT_VOLUME, + WM8955_MOZC, WM8955_MOZC); + + /* Also enable adaptive bass boost by default */ + snd_soc_component_update_bits(component, WM8955_BASS_CONTROL, WM8955_BB, WM8955_BB); + + /* Set platform data values */ + if (pdata) { + if (pdata->out2_speaker) + snd_soc_component_update_bits(component, WM8955_ADDITIONAL_CONTROL_2, + WM8955_ROUT2INV, WM8955_ROUT2INV); + + if (pdata->monoin_diff) + snd_soc_component_update_bits(component, WM8955_MONO_OUT_MIX_1, + WM8955_DMEN, WM8955_DMEN); + } + + snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY); + + /* Bias level configuration will have done an extra enable */ + regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); + + return 0; + +err_enable: + regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies); + return ret; +} + +static const struct snd_soc_component_driver soc_component_dev_wm8955 = { + .probe = wm8955_probe, + .set_bias_level = wm8955_set_bias_level, + .controls = wm8955_snd_controls, + .num_controls = ARRAY_SIZE(wm8955_snd_controls), + .dapm_widgets = wm8955_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8955_dapm_widgets), + .dapm_routes = wm8955_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(wm8955_dapm_routes), + .suspend_bias_off = 1, + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, +}; + +static const struct regmap_config wm8955_regmap = { + .reg_bits = 7, + .val_bits = 9, + + .max_register = WM8955_MAX_REGISTER, + .volatile_reg = wm8955_volatile, + .writeable_reg = wm8955_writeable, + + .cache_type = REGCACHE_RBTREE, + .reg_defaults = wm8955_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(wm8955_reg_defaults), +}; + +static int wm8955_i2c_probe(struct i2c_client *i2c) +{ + struct wm8955_priv *wm8955; + int ret; + + wm8955 = devm_kzalloc(&i2c->dev, sizeof(struct wm8955_priv), + GFP_KERNEL); + if (wm8955 == NULL) + return -ENOMEM; + + wm8955->regmap = devm_regmap_init_i2c(i2c, &wm8955_regmap); + if (IS_ERR(wm8955->regmap)) { + ret = PTR_ERR(wm8955->regmap); + dev_err(&i2c->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + i2c_set_clientdata(i2c, wm8955); + + ret = devm_snd_soc_register_component(&i2c->dev, + &soc_component_dev_wm8955, &wm8955_dai, 1); + + return ret; +} + +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", + }, + .probe_new = wm8955_i2c_probe, + .id_table = wm8955_i2c_id, +}; + +module_i2c_driver(wm8955_i2c_driver); + +MODULE_DESCRIPTION("ASoC WM8955 driver"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); |