diff options
Diffstat (limited to 'kernel/sound/soc/codecs/wm8961.c')
| -rw-r--r-- | kernel/sound/soc/codecs/wm8961.c | 998 |
1 files changed, 998 insertions, 0 deletions
diff --git a/kernel/sound/soc/codecs/wm8961.c b/kernel/sound/soc/codecs/wm8961.c new file mode 100644 index 000000000..95e2c1bfc --- /dev/null +++ b/kernel/sound/soc/codecs/wm8961.c @@ -0,0 +1,998 @@ +/* + * wm8961.c -- WM8961 ALSA SoC Audio driver + * + * Copyright 2009-10 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. + * + * Currently unimplemented features: + * - ALC + */ + +#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/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 "wm8961.h" + +#define WM8961_MAX_REGISTER 0xFC + +static const struct reg_default wm8961_reg_defaults[] = { + { 0, 0x009F }, /* R0 - Left Input volume */ + { 1, 0x009F }, /* R1 - Right Input volume */ + { 2, 0x0000 }, /* R2 - LOUT1 volume */ + { 3, 0x0000 }, /* R3 - ROUT1 volume */ + { 4, 0x0020 }, /* R4 - Clocking1 */ + { 5, 0x0008 }, /* R5 - ADC & DAC Control 1 */ + { 6, 0x0000 }, /* R6 - ADC & DAC Control 2 */ + { 7, 0x000A }, /* R7 - Audio Interface 0 */ + { 8, 0x01F4 }, /* R8 - Clocking2 */ + { 9, 0x0000 }, /* R9 - Audio Interface 1 */ + { 10, 0x00FF }, /* R10 - Left DAC volume */ + { 11, 0x00FF }, /* R11 - Right DAC volume */ + + { 14, 0x0040 }, /* R14 - Audio Interface 2 */ + + { 17, 0x007B }, /* R17 - ALC1 */ + { 18, 0x0000 }, /* R18 - ALC2 */ + { 19, 0x0032 }, /* R19 - ALC3 */ + { 20, 0x0000 }, /* R20 - Noise Gate */ + { 21, 0x00C0 }, /* R21 - Left ADC volume */ + { 22, 0x00C0 }, /* R22 - Right ADC volume */ + { 23, 0x0120 }, /* R23 - Additional control(1) */ + { 24, 0x0000 }, /* R24 - Additional control(2) */ + { 25, 0x0000 }, /* R25 - Pwr Mgmt (1) */ + { 26, 0x0000 }, /* R26 - Pwr Mgmt (2) */ + { 27, 0x0000 }, /* R27 - Additional Control (3) */ + { 28, 0x0000 }, /* R28 - Anti-pop */ + + { 30, 0x005F }, /* R30 - Clocking 3 */ + + { 32, 0x0000 }, /* R32 - ADCL signal path */ + { 33, 0x0000 }, /* R33 - ADCR signal path */ + + { 40, 0x0000 }, /* R40 - LOUT2 volume */ + { 41, 0x0000 }, /* R41 - ROUT2 volume */ + + { 47, 0x0000 }, /* R47 - Pwr Mgmt (3) */ + { 48, 0x0023 }, /* R48 - Additional Control (4) */ + { 49, 0x0000 }, /* R49 - Class D Control 1 */ + + { 51, 0x0003 }, /* R51 - Class D Control 2 */ + + { 56, 0x0106 }, /* R56 - Clocking 4 */ + { 57, 0x0000 }, /* R57 - DSP Sidetone 0 */ + { 58, 0x0000 }, /* R58 - DSP Sidetone 1 */ + + { 60, 0x0000 }, /* R60 - DC Servo 0 */ + { 61, 0x0000 }, /* R61 - DC Servo 1 */ + + { 63, 0x015E }, /* R63 - DC Servo 3 */ + + { 65, 0x0010 }, /* R65 - DC Servo 5 */ + + { 68, 0x0003 }, /* R68 - Analogue PGA Bias */ + { 69, 0x0000 }, /* R69 - Analogue HP 0 */ + + { 71, 0x01FB }, /* R71 - Analogue HP 2 */ + { 72, 0x0000 }, /* R72 - Charge Pump 1 */ + + { 82, 0x0000 }, /* R82 - Charge Pump B */ + + { 87, 0x0000 }, /* R87 - Write Sequencer 1 */ + { 88, 0x0000 }, /* R88 - Write Sequencer 2 */ + { 89, 0x0000 }, /* R89 - Write Sequencer 3 */ + { 90, 0x0000 }, /* R90 - Write Sequencer 4 */ + { 91, 0x0000 }, /* R91 - Write Sequencer 5 */ + { 92, 0x0000 }, /* R92 - Write Sequencer 6 */ + { 93, 0x0000 }, /* R93 - Write Sequencer 7 */ + + { 252, 0x0001 }, /* R252 - General test 1 */ +}; + +struct wm8961_priv { + struct regmap *regmap; + int sysclk; +}; + +static bool wm8961_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case WM8961_SOFTWARE_RESET: + case WM8961_WRITE_SEQUENCER_7: + case WM8961_DC_SERVO_1: + return true; + + default: + return false; + } +} + +static bool wm8961_readable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case WM8961_LEFT_INPUT_VOLUME: + case WM8961_RIGHT_INPUT_VOLUME: + case WM8961_LOUT1_VOLUME: + case WM8961_ROUT1_VOLUME: + case WM8961_CLOCKING1: + case WM8961_ADC_DAC_CONTROL_1: + case WM8961_ADC_DAC_CONTROL_2: + case WM8961_AUDIO_INTERFACE_0: + case WM8961_CLOCKING2: + case WM8961_AUDIO_INTERFACE_1: + case WM8961_LEFT_DAC_VOLUME: + case WM8961_RIGHT_DAC_VOLUME: + case WM8961_AUDIO_INTERFACE_2: + case WM8961_SOFTWARE_RESET: + case WM8961_ALC1: + case WM8961_ALC2: + case WM8961_ALC3: + case WM8961_NOISE_GATE: + case WM8961_LEFT_ADC_VOLUME: + case WM8961_RIGHT_ADC_VOLUME: + case WM8961_ADDITIONAL_CONTROL_1: + case WM8961_ADDITIONAL_CONTROL_2: + case WM8961_PWR_MGMT_1: + case WM8961_PWR_MGMT_2: + case WM8961_ADDITIONAL_CONTROL_3: + case WM8961_ANTI_POP: + case WM8961_CLOCKING_3: + case WM8961_ADCL_SIGNAL_PATH: + case WM8961_ADCR_SIGNAL_PATH: + case WM8961_LOUT2_VOLUME: + case WM8961_ROUT2_VOLUME: + case WM8961_PWR_MGMT_3: + case WM8961_ADDITIONAL_CONTROL_4: + case WM8961_CLASS_D_CONTROL_1: + case WM8961_CLASS_D_CONTROL_2: + case WM8961_CLOCKING_4: + case WM8961_DSP_SIDETONE_0: + case WM8961_DSP_SIDETONE_1: + case WM8961_DC_SERVO_0: + case WM8961_DC_SERVO_1: + case WM8961_DC_SERVO_3: + case WM8961_DC_SERVO_5: + case WM8961_ANALOGUE_PGA_BIAS: + case WM8961_ANALOGUE_HP_0: + case WM8961_ANALOGUE_HP_2: + case WM8961_CHARGE_PUMP_1: + case WM8961_CHARGE_PUMP_B: + case WM8961_WRITE_SEQUENCER_1: + case WM8961_WRITE_SEQUENCER_2: + case WM8961_WRITE_SEQUENCER_3: + case WM8961_WRITE_SEQUENCER_4: + case WM8961_WRITE_SEQUENCER_5: + case WM8961_WRITE_SEQUENCER_6: + case WM8961_WRITE_SEQUENCER_7: + case WM8961_GENERAL_TEST_1: + return true; + default: + return false; + } +} + +/* + * The headphone output supports special anti-pop sequences giving + * silent power up and power down. + */ +static int wm8961_hp_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); + u16 hp_reg = snd_soc_read(codec, WM8961_ANALOGUE_HP_0); + u16 cp_reg = snd_soc_read(codec, WM8961_CHARGE_PUMP_1); + u16 pwr_reg = snd_soc_read(codec, WM8961_PWR_MGMT_2); + u16 dcs_reg = snd_soc_read(codec, WM8961_DC_SERVO_1); + int timeout = 500; + + if (event & SND_SOC_DAPM_POST_PMU) { + /* Make sure the output is shorted */ + hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT); + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + + /* Enable the charge pump */ + cp_reg |= WM8961_CP_ENA; + snd_soc_write(codec, WM8961_CHARGE_PUMP_1, cp_reg); + mdelay(5); + + /* Enable the PGA */ + pwr_reg |= WM8961_LOUT1_PGA | WM8961_ROUT1_PGA; + snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); + + /* Enable the amplifier */ + hp_reg |= WM8961_HPR_ENA | WM8961_HPL_ENA; + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + + /* Second stage enable */ + hp_reg |= WM8961_HPR_ENA_DLY | WM8961_HPL_ENA_DLY; + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + + /* Enable the DC servo & trigger startup */ + dcs_reg |= + WM8961_DCS_ENA_CHAN_HPR | WM8961_DCS_TRIG_STARTUP_HPR | + WM8961_DCS_ENA_CHAN_HPL | WM8961_DCS_TRIG_STARTUP_HPL; + dev_dbg(codec->dev, "Enabling DC servo\n"); + + snd_soc_write(codec, WM8961_DC_SERVO_1, dcs_reg); + do { + msleep(1); + dcs_reg = snd_soc_read(codec, WM8961_DC_SERVO_1); + } while (--timeout && + dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR | + WM8961_DCS_TRIG_STARTUP_HPL)); + if (dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR | + WM8961_DCS_TRIG_STARTUP_HPL)) + dev_err(codec->dev, "DC servo timed out\n"); + else + dev_dbg(codec->dev, "DC servo startup complete\n"); + + /* Enable the output stage */ + hp_reg |= WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP; + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + + /* Remove the short on the output stage */ + hp_reg |= WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT; + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + } + + if (event & SND_SOC_DAPM_PRE_PMD) { + /* Short the output */ + hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT); + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + + /* Disable the output stage */ + hp_reg &= ~(WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP); + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + + /* Disable DC offset cancellation */ + dcs_reg &= ~(WM8961_DCS_ENA_CHAN_HPR | + WM8961_DCS_ENA_CHAN_HPL); + snd_soc_write(codec, WM8961_DC_SERVO_1, dcs_reg); + + /* Finish up */ + hp_reg &= ~(WM8961_HPR_ENA_DLY | WM8961_HPR_ENA | + WM8961_HPL_ENA_DLY | WM8961_HPL_ENA); + snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); + + /* Disable the PGA */ + pwr_reg &= ~(WM8961_LOUT1_PGA | WM8961_ROUT1_PGA); + snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); + + /* Disable the charge pump */ + dev_dbg(codec->dev, "Disabling charge pump\n"); + snd_soc_write(codec, WM8961_CHARGE_PUMP_1, + cp_reg & ~WM8961_CP_ENA); + } + + return 0; +} + +static int wm8961_spk_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); + u16 pwr_reg = snd_soc_read(codec, WM8961_PWR_MGMT_2); + u16 spk_reg = snd_soc_read(codec, WM8961_CLASS_D_CONTROL_1); + + if (event & SND_SOC_DAPM_POST_PMU) { + /* Enable the PGA */ + pwr_reg |= WM8961_SPKL_PGA | WM8961_SPKR_PGA; + snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); + + /* Enable the amplifier */ + spk_reg |= WM8961_SPKL_ENA | WM8961_SPKR_ENA; + snd_soc_write(codec, WM8961_CLASS_D_CONTROL_1, spk_reg); + } + + if (event & SND_SOC_DAPM_PRE_PMD) { + /* Disable the amplifier */ + spk_reg &= ~(WM8961_SPKL_ENA | WM8961_SPKR_ENA); + snd_soc_write(codec, WM8961_CLASS_D_CONTROL_1, spk_reg); + + /* Disable the PGA */ + pwr_reg &= ~(WM8961_SPKL_PGA | WM8961_SPKR_PGA); + snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); + } + + return 0; +} + +static const char *adc_hpf_text[] = { + "Hi-fi", "Voice 1", "Voice 2", "Voice 3", +}; + +static SOC_ENUM_SINGLE_DECL(adc_hpf, + WM8961_ADC_DAC_CONTROL_2, 7, adc_hpf_text); + +static const char *dac_deemph_text[] = { + "None", "32kHz", "44.1kHz", "48kHz", +}; + +static SOC_ENUM_SINGLE_DECL(dac_deemph, + WM8961_ADC_DAC_CONTROL_1, 1, dac_deemph_text); + +static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); +static const DECLARE_TLV_DB_SCALE(hp_sec_tlv, -700, 100, 0); +static const DECLARE_TLV_DB_SCALE(adc_tlv, -7200, 75, 1); +static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -3600, 300, 0); +static unsigned int boost_tlv[] = { + TLV_DB_RANGE_HEAD(4), + 0, 0, TLV_DB_SCALE_ITEM(0, 0, 0), + 1, 1, TLV_DB_SCALE_ITEM(13, 0, 0), + 2, 2, TLV_DB_SCALE_ITEM(20, 0, 0), + 3, 3, TLV_DB_SCALE_ITEM(29, 0, 0), +}; +static const DECLARE_TLV_DB_SCALE(pga_tlv, -2325, 75, 0); + +static const struct snd_kcontrol_new wm8961_snd_controls[] = { +SOC_DOUBLE_R_TLV("Headphone Volume", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME, + 0, 127, 0, out_tlv), +SOC_DOUBLE_TLV("Headphone Secondary Volume", WM8961_ANALOGUE_HP_2, + 6, 3, 7, 0, hp_sec_tlv), +SOC_DOUBLE_R("Headphone ZC Switch", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME, + 7, 1, 0), + +SOC_DOUBLE_R_TLV("Speaker Volume", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME, + 0, 127, 0, out_tlv), +SOC_DOUBLE_R("Speaker ZC Switch", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME, + 7, 1, 0), +SOC_SINGLE("Speaker AC Gain", WM8961_CLASS_D_CONTROL_2, 0, 7, 0), + +SOC_SINGLE("DAC x128 OSR Switch", WM8961_ADC_DAC_CONTROL_2, 0, 1, 0), +SOC_ENUM("DAC Deemphasis", dac_deemph), +SOC_SINGLE("DAC Soft Mute Switch", WM8961_ADC_DAC_CONTROL_2, 3, 1, 0), + +SOC_DOUBLE_R_TLV("Sidetone Volume", WM8961_DSP_SIDETONE_0, + WM8961_DSP_SIDETONE_1, 4, 12, 0, sidetone_tlv), + +SOC_SINGLE("ADC High Pass Filter Switch", WM8961_ADC_DAC_CONTROL_1, 0, 1, 0), +SOC_ENUM("ADC High Pass Filter Mode", adc_hpf), + +SOC_DOUBLE_R_TLV("Capture Volume", + WM8961_LEFT_ADC_VOLUME, WM8961_RIGHT_ADC_VOLUME, + 1, 119, 0, adc_tlv), +SOC_DOUBLE_R_TLV("Capture Boost Volume", + WM8961_ADCL_SIGNAL_PATH, WM8961_ADCR_SIGNAL_PATH, + 4, 3, 0, boost_tlv), +SOC_DOUBLE_R_TLV("Capture PGA Volume", + WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME, + 0, 62, 0, pga_tlv), +SOC_DOUBLE_R("Capture PGA ZC Switch", + WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME, + 6, 1, 1), +SOC_DOUBLE_R("Capture PGA Switch", + WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME, + 7, 1, 1), +}; + +static const char *sidetone_text[] = { + "None", "Left", "Right" +}; + +static SOC_ENUM_SINGLE_DECL(dacl_sidetone, + WM8961_DSP_SIDETONE_0, 2, sidetone_text); + +static SOC_ENUM_SINGLE_DECL(dacr_sidetone, + WM8961_DSP_SIDETONE_1, 2, sidetone_text); + +static const struct snd_kcontrol_new dacl_mux = + SOC_DAPM_ENUM("DACL Sidetone", dacl_sidetone); + +static const struct snd_kcontrol_new dacr_mux = + SOC_DAPM_ENUM("DACR Sidetone", dacr_sidetone); + +static const struct snd_soc_dapm_widget wm8961_dapm_widgets[] = { +SND_SOC_DAPM_INPUT("LINPUT"), +SND_SOC_DAPM_INPUT("RINPUT"), + +SND_SOC_DAPM_SUPPLY("CLK_DSP", WM8961_CLOCKING2, 4, 0, NULL, 0), + +SND_SOC_DAPM_PGA("Left Input", WM8961_PWR_MGMT_1, 5, 0, NULL, 0), +SND_SOC_DAPM_PGA("Right Input", WM8961_PWR_MGMT_1, 4, 0, NULL, 0), + +SND_SOC_DAPM_ADC("ADCL", "HiFi Capture", WM8961_PWR_MGMT_1, 3, 0), +SND_SOC_DAPM_ADC("ADCR", "HiFi Capture", WM8961_PWR_MGMT_1, 2, 0), + +SND_SOC_DAPM_SUPPLY("MICBIAS", WM8961_PWR_MGMT_1, 1, 0, NULL, 0), + +SND_SOC_DAPM_MUX("DACL Sidetone", SND_SOC_NOPM, 0, 0, &dacl_mux), +SND_SOC_DAPM_MUX("DACR Sidetone", SND_SOC_NOPM, 0, 0, &dacr_mux), + +SND_SOC_DAPM_DAC("DACL", "HiFi Playback", WM8961_PWR_MGMT_2, 8, 0), +SND_SOC_DAPM_DAC("DACR", "HiFi Playback", WM8961_PWR_MGMT_2, 7, 0), + +/* Handle as a mono path for DCS */ +SND_SOC_DAPM_PGA_E("Headphone Output", SND_SOC_NOPM, + 4, 0, NULL, 0, wm8961_hp_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), +SND_SOC_DAPM_PGA_E("Speaker Output", SND_SOC_NOPM, + 4, 0, NULL, 0, wm8961_spk_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), + +SND_SOC_DAPM_OUTPUT("HP_L"), +SND_SOC_DAPM_OUTPUT("HP_R"), +SND_SOC_DAPM_OUTPUT("SPK_LN"), +SND_SOC_DAPM_OUTPUT("SPK_LP"), +SND_SOC_DAPM_OUTPUT("SPK_RN"), +SND_SOC_DAPM_OUTPUT("SPK_RP"), +}; + + +static const struct snd_soc_dapm_route audio_paths[] = { + { "DACL", NULL, "CLK_DSP" }, + { "DACL", NULL, "DACL Sidetone" }, + { "DACR", NULL, "CLK_DSP" }, + { "DACR", NULL, "DACR Sidetone" }, + + { "DACL Sidetone", "Left", "ADCL" }, + { "DACL Sidetone", "Right", "ADCR" }, + + { "DACR Sidetone", "Left", "ADCL" }, + { "DACR Sidetone", "Right", "ADCR" }, + + { "HP_L", NULL, "Headphone Output" }, + { "HP_R", NULL, "Headphone Output" }, + { "Headphone Output", NULL, "DACL" }, + { "Headphone Output", NULL, "DACR" }, + + { "SPK_LN", NULL, "Speaker Output" }, + { "SPK_LP", NULL, "Speaker Output" }, + { "SPK_RN", NULL, "Speaker Output" }, + { "SPK_RP", NULL, "Speaker Output" }, + + { "Speaker Output", NULL, "DACL" }, + { "Speaker Output", NULL, "DACR" }, + + { "ADCL", NULL, "Left Input" }, + { "ADCL", NULL, "CLK_DSP" }, + { "ADCR", NULL, "Right Input" }, + { "ADCR", NULL, "CLK_DSP" }, + + { "Left Input", NULL, "LINPUT" }, + { "Right Input", NULL, "RINPUT" }, + +}; + +/* Values for CLK_SYS_RATE */ +static struct { + int ratio; + u16 val; +} wm8961_clk_sys_ratio[] = { + { 64, 0 }, + { 128, 1 }, + { 192, 2 }, + { 256, 3 }, + { 384, 4 }, + { 512, 5 }, + { 768, 6 }, + { 1024, 7 }, + { 1408, 8 }, + { 1536, 9 }, +}; + +/* Values for SAMPLE_RATE */ +static struct { + int rate; + u16 val; +} wm8961_srate[] = { + { 48000, 0 }, + { 44100, 0 }, + { 32000, 1 }, + { 22050, 2 }, + { 24000, 2 }, + { 16000, 3 }, + { 11250, 4 }, + { 12000, 4 }, + { 8000, 5 }, +}; + +static int wm8961_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 wm8961_priv *wm8961 = snd_soc_codec_get_drvdata(codec); + int i, best, target, fs; + u16 reg; + + fs = params_rate(params); + + if (!wm8961->sysclk) { + dev_err(codec->dev, "MCLK has not been specified\n"); + return -EINVAL; + } + + /* Find the closest sample rate for the filters */ + best = 0; + for (i = 0; i < ARRAY_SIZE(wm8961_srate); i++) { + if (abs(wm8961_srate[i].rate - fs) < + abs(wm8961_srate[best].rate - fs)) + best = i; + } + reg = snd_soc_read(codec, WM8961_ADDITIONAL_CONTROL_3); + reg &= ~WM8961_SAMPLE_RATE_MASK; + reg |= wm8961_srate[best].val; + snd_soc_write(codec, WM8961_ADDITIONAL_CONTROL_3, reg); + dev_dbg(codec->dev, "Selected SRATE %dHz for %dHz\n", + wm8961_srate[best].rate, fs); + + /* Select a CLK_SYS/fs ratio equal to or higher than required */ + target = wm8961->sysclk / fs; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && target < 64) { + dev_err(codec->dev, + "SYSCLK must be at least 64*fs for DAC\n"); + return -EINVAL; + } + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && target < 256) { + dev_err(codec->dev, + "SYSCLK must be at least 256*fs for ADC\n"); + return -EINVAL; + } + + for (i = 0; i < ARRAY_SIZE(wm8961_clk_sys_ratio); i++) { + if (wm8961_clk_sys_ratio[i].ratio >= target) + break; + } + if (i == ARRAY_SIZE(wm8961_clk_sys_ratio)) { + dev_err(codec->dev, "Unable to generate CLK_SYS_RATE\n"); + return -EINVAL; + } + dev_dbg(codec->dev, "Selected CLK_SYS_RATE of %d for %d/%d=%d\n", + wm8961_clk_sys_ratio[i].ratio, wm8961->sysclk, fs, + wm8961->sysclk / fs); + + reg = snd_soc_read(codec, WM8961_CLOCKING_4); + reg &= ~WM8961_CLK_SYS_RATE_MASK; + reg |= wm8961_clk_sys_ratio[i].val << WM8961_CLK_SYS_RATE_SHIFT; + snd_soc_write(codec, WM8961_CLOCKING_4, reg); + + reg = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_0); + reg &= ~WM8961_WL_MASK; + switch (params_width(params)) { + case 16: + break; + case 20: + reg |= 1 << WM8961_WL_SHIFT; + break; + case 24: + reg |= 2 << WM8961_WL_SHIFT; + break; + case 32: + reg |= 3 << WM8961_WL_SHIFT; + break; + default: + return -EINVAL; + } + snd_soc_write(codec, WM8961_AUDIO_INTERFACE_0, reg); + + /* Sloping stop-band filter is recommended for <= 24kHz */ + reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_2); + if (fs <= 24000) + reg |= WM8961_DACSLOPE; + else + reg &= ~WM8961_DACSLOPE; + snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_2, reg); + + return 0; +} + +static int wm8961_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, + int dir) +{ + struct snd_soc_codec *codec = dai->codec; + struct wm8961_priv *wm8961 = snd_soc_codec_get_drvdata(codec); + u16 reg = snd_soc_read(codec, WM8961_CLOCKING1); + + if (freq > 33000000) { + dev_err(codec->dev, "MCLK must be <33MHz\n"); + return -EINVAL; + } + + if (freq > 16500000) { + dev_dbg(codec->dev, "Using MCLK/2 for %dHz MCLK\n", freq); + reg |= WM8961_MCLKDIV; + freq /= 2; + } else { + dev_dbg(codec->dev, "Using MCLK/1 for %dHz MCLK\n", freq); + reg &= ~WM8961_MCLKDIV; + } + + snd_soc_write(codec, WM8961_CLOCKING1, reg); + + wm8961->sysclk = freq; + + return 0; +} + +static int wm8961_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct snd_soc_codec *codec = dai->codec; + u16 aif = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_0); + + aif &= ~(WM8961_BCLKINV | WM8961_LRP | + WM8961_MS | WM8961_FORMAT_MASK); + + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + aif |= WM8961_MS; + break; + case SND_SOC_DAIFMT_CBS_CFS: + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_RIGHT_J: + break; + + case SND_SOC_DAIFMT_LEFT_J: + aif |= 1; + break; + + case SND_SOC_DAIFMT_I2S: + aif |= 2; + break; + + case SND_SOC_DAIFMT_DSP_B: + aif |= WM8961_LRP; + case SND_SOC_DAIFMT_DSP_A: + aif |= 3; + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + case SND_SOC_DAIFMT_IB_NF: + break; + default: + return -EINVAL; + } + break; + + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_NB_IF: + aif |= WM8961_LRP; + break; + case SND_SOC_DAIFMT_IB_NF: + aif |= WM8961_BCLKINV; + break; + case SND_SOC_DAIFMT_IB_IF: + aif |= WM8961_BCLKINV | WM8961_LRP; + break; + default: + return -EINVAL; + } + + return snd_soc_write(codec, WM8961_AUDIO_INTERFACE_0, aif); +} + +static int wm8961_set_tristate(struct snd_soc_dai *dai, int tristate) +{ + struct snd_soc_codec *codec = dai->codec; + u16 reg = snd_soc_read(codec, WM8961_ADDITIONAL_CONTROL_2); + + if (tristate) + reg |= WM8961_TRIS; + else + reg &= ~WM8961_TRIS; + + return snd_soc_write(codec, WM8961_ADDITIONAL_CONTROL_2, reg); +} + +static int wm8961_digital_mute(struct snd_soc_dai *dai, int mute) +{ + struct snd_soc_codec *codec = dai->codec; + u16 reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_1); + + if (mute) + reg |= WM8961_DACMU; + else + reg &= ~WM8961_DACMU; + + msleep(17); + + return snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_1, reg); +} + +static int wm8961_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div) +{ + struct snd_soc_codec *codec = dai->codec; + u16 reg; + + switch (div_id) { + case WM8961_BCLK: + reg = snd_soc_read(codec, WM8961_CLOCKING2); + reg &= ~WM8961_BCLKDIV_MASK; + reg |= div; + snd_soc_write(codec, WM8961_CLOCKING2, reg); + break; + + case WM8961_LRCLK: + reg = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_2); + reg &= ~WM8961_LRCLK_RATE_MASK; + reg |= div; + snd_soc_write(codec, WM8961_AUDIO_INTERFACE_2, reg); + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int wm8961_set_bias_level(struct snd_soc_codec *codec, + enum snd_soc_bias_level level) +{ + u16 reg; + + /* This is all slightly unusual since we have no bypass paths + * and the output amplifier structure means we can just slam + * the biases straight up rather than having to ramp them + * slowly. + */ + switch (level) { + case SND_SOC_BIAS_ON: + break; + + case SND_SOC_BIAS_PREPARE: + if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY) { + /* Enable bias generation */ + reg = snd_soc_read(codec, WM8961_ANTI_POP); + reg |= WM8961_BUFIOEN | WM8961_BUFDCOPEN; + snd_soc_write(codec, WM8961_ANTI_POP, reg); + + /* VMID=2*50k, VREF */ + reg = snd_soc_read(codec, WM8961_PWR_MGMT_1); + reg &= ~WM8961_VMIDSEL_MASK; + reg |= (1 << WM8961_VMIDSEL_SHIFT) | WM8961_VREF; + snd_soc_write(codec, WM8961_PWR_MGMT_1, reg); + } + break; + + case SND_SOC_BIAS_STANDBY: + if (codec->dapm.bias_level == SND_SOC_BIAS_PREPARE) { + /* VREF off */ + reg = snd_soc_read(codec, WM8961_PWR_MGMT_1); + reg &= ~WM8961_VREF; + snd_soc_write(codec, WM8961_PWR_MGMT_1, reg); + + /* Bias generation off */ + reg = snd_soc_read(codec, WM8961_ANTI_POP); + reg &= ~(WM8961_BUFIOEN | WM8961_BUFDCOPEN); + snd_soc_write(codec, WM8961_ANTI_POP, reg); + + /* VMID off */ + reg = snd_soc_read(codec, WM8961_PWR_MGMT_1); + reg &= ~WM8961_VMIDSEL_MASK; + snd_soc_write(codec, WM8961_PWR_MGMT_1, reg); + } + break; + + case SND_SOC_BIAS_OFF: + break; + } + + codec->dapm.bias_level = level; + + return 0; +} + + +#define WM8961_RATES SNDRV_PCM_RATE_8000_48000 + +#define WM8961_FORMATS \ + (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \ + SNDRV_PCM_FMTBIT_S24_LE) + +static const struct snd_soc_dai_ops wm8961_dai_ops = { + .hw_params = wm8961_hw_params, + .set_sysclk = wm8961_set_sysclk, + .set_fmt = wm8961_set_fmt, + .digital_mute = wm8961_digital_mute, + .set_tristate = wm8961_set_tristate, + .set_clkdiv = wm8961_set_clkdiv, +}; + +static struct snd_soc_dai_driver wm8961_dai = { + .name = "wm8961-hifi", + .playback = { + .stream_name = "HiFi Playback", + .channels_min = 1, + .channels_max = 2, + .rates = WM8961_RATES, + .formats = WM8961_FORMATS,}, + .capture = { + .stream_name = "HiFi Capture", + .channels_min = 1, + .channels_max = 2, + .rates = WM8961_RATES, + .formats = WM8961_FORMATS,}, + .ops = &wm8961_dai_ops, +}; + +static int wm8961_probe(struct snd_soc_codec *codec) +{ + u16 reg; + + /* Enable class W */ + reg = snd_soc_read(codec, WM8961_CHARGE_PUMP_B); + reg |= WM8961_CP_DYN_PWR_MASK; + snd_soc_write(codec, WM8961_CHARGE_PUMP_B, reg); + + /* Latch volume update bits (right channel only, we always + * write both out) and default ZC on. */ + reg = snd_soc_read(codec, WM8961_ROUT1_VOLUME); + snd_soc_write(codec, WM8961_ROUT1_VOLUME, + reg | WM8961_LO1ZC | WM8961_OUT1VU); + snd_soc_write(codec, WM8961_LOUT1_VOLUME, reg | WM8961_LO1ZC); + reg = snd_soc_read(codec, WM8961_ROUT2_VOLUME); + snd_soc_write(codec, WM8961_ROUT2_VOLUME, + reg | WM8961_SPKRZC | WM8961_SPKVU); + snd_soc_write(codec, WM8961_LOUT2_VOLUME, reg | WM8961_SPKLZC); + + reg = snd_soc_read(codec, WM8961_RIGHT_ADC_VOLUME); + snd_soc_write(codec, WM8961_RIGHT_ADC_VOLUME, reg | WM8961_ADCVU); + reg = snd_soc_read(codec, WM8961_RIGHT_INPUT_VOLUME); + snd_soc_write(codec, WM8961_RIGHT_INPUT_VOLUME, reg | WM8961_IPVU); + + /* Use soft mute by default */ + reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_2); + reg |= WM8961_DACSMM; + snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_2, reg); + + /* Use automatic clocking mode by default; for now this is all + * we support. + */ + reg = snd_soc_read(codec, WM8961_CLOCKING_3); + reg &= ~WM8961_MANUAL_MODE; + snd_soc_write(codec, WM8961_CLOCKING_3, reg); + + return 0; +} + +#ifdef CONFIG_PM + +static int wm8961_resume(struct snd_soc_codec *codec) +{ + snd_soc_cache_sync(codec); + + return 0; +} +#else +#define wm8961_resume NULL +#endif + +static struct snd_soc_codec_driver soc_codec_dev_wm8961 = { + .probe = wm8961_probe, + .resume = wm8961_resume, + .set_bias_level = wm8961_set_bias_level, + .suspend_bias_off = true, + + .controls = wm8961_snd_controls, + .num_controls = ARRAY_SIZE(wm8961_snd_controls), + .dapm_widgets = wm8961_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8961_dapm_widgets), + .dapm_routes = audio_paths, + .num_dapm_routes = ARRAY_SIZE(audio_paths), +}; + +static const struct regmap_config wm8961_regmap = { + .reg_bits = 8, + .val_bits = 16, + .max_register = WM8961_MAX_REGISTER, + + .reg_defaults = wm8961_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(wm8961_reg_defaults), + .cache_type = REGCACHE_RBTREE, + + .volatile_reg = wm8961_volatile, + .readable_reg = wm8961_readable, +}; + +static int wm8961_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct wm8961_priv *wm8961; + unsigned int val; + int ret; + + wm8961 = devm_kzalloc(&i2c->dev, sizeof(struct wm8961_priv), + GFP_KERNEL); + if (wm8961 == NULL) + return -ENOMEM; + + wm8961->regmap = devm_regmap_init_i2c(i2c, &wm8961_regmap); + if (IS_ERR(wm8961->regmap)) + return PTR_ERR(wm8961->regmap); + + ret = regmap_read(wm8961->regmap, WM8961_SOFTWARE_RESET, &val); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to read chip ID: %d\n", ret); + return ret; + } + + if (val != 0x1801) { + dev_err(&i2c->dev, "Device is not a WM8961: ID=0x%x\n", val); + return -EINVAL; + } + + /* This isn't volatile - readback doesn't correspond to write */ + regcache_cache_bypass(wm8961->regmap, true); + ret = regmap_read(wm8961->regmap, WM8961_RIGHT_INPUT_VOLUME, &val); + regcache_cache_bypass(wm8961->regmap, false); + + if (ret != 0) { + dev_err(&i2c->dev, "Failed to read chip revision: %d\n", ret); + return ret; + } + + dev_info(&i2c->dev, "WM8961 family %d revision %c\n", + (val & WM8961_DEVICE_ID_MASK) >> WM8961_DEVICE_ID_SHIFT, + ((val & WM8961_CHIP_REV_MASK) >> WM8961_CHIP_REV_SHIFT) + + 'A'); + + ret = regmap_write(wm8961->regmap, WM8961_SOFTWARE_RESET, 0x1801); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to issue reset: %d\n", ret); + return ret; + } + + i2c_set_clientdata(i2c, wm8961); + + ret = snd_soc_register_codec(&i2c->dev, + &soc_codec_dev_wm8961, &wm8961_dai, 1); + + return ret; +} + +static int wm8961_i2c_remove(struct i2c_client *client) +{ + snd_soc_unregister_codec(&client->dev); + + return 0; +} + +static const struct i2c_device_id wm8961_i2c_id[] = { + { "wm8961", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm8961_i2c_id); + +static struct i2c_driver wm8961_i2c_driver = { + .driver = { + .name = "wm8961", + .owner = THIS_MODULE, + }, + .probe = wm8961_i2c_probe, + .remove = wm8961_i2c_remove, + .id_table = wm8961_i2c_id, +}; + +module_i2c_driver(wm8961_i2c_driver); + +MODULE_DESCRIPTION("ASoC WM8961 driver"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); |