--- /dev/null
+/*
+ * 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");
Code Review / kvmfornfv.git / blobdiff