--- /dev/null
+/*
+ * wm2000.c -- WM2000 ALSA Soc Audio driver
+ *
+ * Copyright 2008-2011 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * 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.
+ *
+ * The download image for the WM2000 will be requested as
+ * 'wm2000_anc.bin' by default (overridable via platform data) at
+ * runtime and is expected to be in flat binary format. This is
+ * generated by Wolfson configuration tools and includes
+ * system-specific callibration information. If supplied as a
+ * sequence of ASCII-encoded hexidecimal bytes this can be converted
+ * into a flat binary with a command such as this on the command line:
+ *
+ * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
+ * < file > wm2000_anc.bin
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/firmware.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/debugfs.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/wm2000.h>
+
+#include "wm2000.h"
+
+#define WM2000_NUM_SUPPLIES 3
+
+static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
+ "SPKVDD",
+ "DBVDD",
+ "DCVDD",
+};
+
+enum wm2000_anc_mode {
+ ANC_ACTIVE = 0,
+ ANC_BYPASS = 1,
+ ANC_STANDBY = 2,
+ ANC_OFF = 3,
+};
+
+struct wm2000_priv {
+ struct i2c_client *i2c;
+ struct regmap *regmap;
+ struct clk *mclk;
+
+ struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
+
+ enum wm2000_anc_mode anc_mode;
+
+ unsigned int anc_active:1;
+ unsigned int anc_eng_ena:1;
+ unsigned int spk_ena:1;
+
+ unsigned int speech_clarity:1;
+
+ int anc_download_size;
+ char *anc_download;
+
+ struct mutex lock;
+};
+
+static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
+ unsigned int value)
+{
+ struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
+ return regmap_write(wm2000->regmap, reg, value);
+}
+
+static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
+{
+ struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(wm2000->regmap, r, &val);
+ if (ret < 0)
+ return -1;
+
+ return val;
+}
+
+static void wm2000_reset(struct wm2000_priv *wm2000)
+{
+ struct i2c_client *i2c = wm2000->i2c;
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
+ wm2000_write(i2c, WM2000_REG_ID1, 0);
+
+ wm2000->anc_mode = ANC_OFF;
+}
+
+static int wm2000_poll_bit(struct i2c_client *i2c,
+ unsigned int reg, u8 mask)
+{
+ int timeout = 4000;
+ int val;
+
+ val = wm2000_read(i2c, reg);
+
+ while (!(val & mask) && --timeout) {
+ msleep(1);
+ val = wm2000_read(i2c, reg);
+ }
+
+ if (timeout == 0)
+ return 0;
+ else
+ return 1;
+}
+
+static int wm2000_power_up(struct i2c_client *i2c, int analogue)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+ unsigned long rate;
+ int ret;
+
+ if (WARN_ON(wm2000->anc_mode != ANC_OFF))
+ return -EINVAL;
+
+ dev_dbg(&i2c->dev, "Beginning power up\n");
+
+ ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ rate = clk_get_rate(wm2000->mclk);
+ if (rate <= 13500000) {
+ dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2,
+ WM2000_MCLK_DIV2_ENA_CLR);
+ } else {
+ dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2,
+ WM2000_MCLK_DIV2_ENA_SET);
+ }
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
+
+ /* Wait for ANC engine to become ready */
+ if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
+ WM2000_ANC_ENG_IDLE)) {
+ dev_err(&i2c->dev, "ANC engine failed to reset\n");
+ regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+ return -ETIMEDOUT;
+ }
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+ WM2000_STATUS_BOOT_COMPLETE)) {
+ dev_err(&i2c->dev, "ANC engine failed to initialise\n");
+ regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+ return -ETIMEDOUT;
+ }
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
+
+ /* Open code download of the data since it is the only bulk
+ * write we do. */
+ dev_dbg(&i2c->dev, "Downloading %d bytes\n",
+ wm2000->anc_download_size - 2);
+
+ ret = i2c_master_send(i2c, wm2000->anc_download,
+ wm2000->anc_download_size);
+ if (ret < 0) {
+ dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
+ regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+ return ret;
+ }
+ if (ret != wm2000->anc_download_size) {
+ dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
+ ret, wm2000->anc_download_size);
+ regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+ return -EIO;
+ }
+
+ dev_dbg(&i2c->dev, "Download complete\n");
+
+ if (analogue) {
+ wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
+
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_ANA_SEQ_INCLUDE |
+ WM2000_MODE_MOUSE_ENABLE |
+ WM2000_MODE_THERMAL_ENABLE);
+ } else {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_MOUSE_ENABLE |
+ WM2000_MODE_THERMAL_ENABLE);
+ }
+
+ ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
+ if (wm2000->speech_clarity)
+ ret |= WM2000_SPEECH_CLARITY;
+ else
+ ret &= ~WM2000_SPEECH_CLARITY;
+ wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
+
+ wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
+ wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+ WM2000_STATUS_MOUSE_ACTIVE)) {
+ dev_err(&i2c->dev, "Timed out waiting for device\n");
+ regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(&i2c->dev, "ANC active\n");
+ if (analogue)
+ dev_dbg(&i2c->dev, "Analogue active\n");
+ wm2000->anc_mode = ANC_ACTIVE;
+
+ return 0;
+}
+
+static int wm2000_power_down(struct i2c_client *i2c, int analogue)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+ if (analogue) {
+ wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_ANA_SEQ_INCLUDE |
+ WM2000_MODE_POWER_DOWN);
+ } else {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_POWER_DOWN);
+ }
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+ WM2000_STATUS_POWER_DOWN_COMPLETE)) {
+ dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
+ return -ETIMEDOUT;
+ }
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
+ WM2000_ANC_ENG_IDLE)) {
+ dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
+ return -ETIMEDOUT;
+ }
+
+ regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+
+ dev_dbg(&i2c->dev, "powered off\n");
+ wm2000->anc_mode = ANC_OFF;
+
+ return 0;
+}
+
+static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+ if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE))
+ return -EINVAL;
+
+ if (analogue) {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_ANA_SEQ_INCLUDE |
+ WM2000_MODE_THERMAL_ENABLE |
+ WM2000_MODE_BYPASS_ENTRY);
+ } else {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_THERMAL_ENABLE |
+ WM2000_MODE_BYPASS_ENTRY);
+ }
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+ WM2000_STATUS_ANC_DISABLED)) {
+ dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
+ return -ETIMEDOUT;
+ }
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
+ WM2000_ANC_ENG_IDLE)) {
+ dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
+ return -ETIMEDOUT;
+ }
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
+
+ wm2000->anc_mode = ANC_BYPASS;
+ dev_dbg(&i2c->dev, "bypass enabled\n");
+
+ return 0;
+}
+
+static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+ if (WARN_ON(wm2000->anc_mode != ANC_BYPASS))
+ return -EINVAL;
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
+
+ if (analogue) {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_ANA_SEQ_INCLUDE |
+ WM2000_MODE_MOUSE_ENABLE |
+ WM2000_MODE_THERMAL_ENABLE);
+ } else {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_MOUSE_ENABLE |
+ WM2000_MODE_THERMAL_ENABLE);
+ }
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+ WM2000_STATUS_MOUSE_ACTIVE)) {
+ dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
+ return -ETIMEDOUT;
+ }
+
+ wm2000->anc_mode = ANC_ACTIVE;
+ dev_dbg(&i2c->dev, "MOUSE active\n");
+
+ return 0;
+}
+
+static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+ if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE))
+ return -EINVAL;
+
+ if (analogue) {
+ wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
+
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_ANA_SEQ_INCLUDE |
+ WM2000_MODE_THERMAL_ENABLE |
+ WM2000_MODE_STANDBY_ENTRY);
+ } else {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_THERMAL_ENABLE |
+ WM2000_MODE_STANDBY_ENTRY);
+ }
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+ WM2000_STATUS_ANC_DISABLED)) {
+ dev_err(&i2c->dev,
+ "Timed out waiting for ANC disable after 1ms\n");
+ return -ETIMEDOUT;
+ }
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) {
+ dev_err(&i2c->dev,
+ "Timed out waiting for standby\n");
+ return -ETIMEDOUT;
+ }
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
+
+ wm2000->anc_mode = ANC_STANDBY;
+ dev_dbg(&i2c->dev, "standby\n");
+ if (analogue)
+ dev_dbg(&i2c->dev, "Analogue disabled\n");
+
+ return 0;
+}
+
+static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+ if (WARN_ON(wm2000->anc_mode != ANC_STANDBY))
+ return -EINVAL;
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
+
+ if (analogue) {
+ wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
+
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_ANA_SEQ_INCLUDE |
+ WM2000_MODE_THERMAL_ENABLE |
+ WM2000_MODE_MOUSE_ENABLE);
+ } else {
+ wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+ WM2000_MODE_THERMAL_ENABLE |
+ WM2000_MODE_MOUSE_ENABLE);
+ }
+
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
+ wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
+
+ if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+ WM2000_STATUS_MOUSE_ACTIVE)) {
+ dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
+ return -ETIMEDOUT;
+ }
+
+ wm2000->anc_mode = ANC_ACTIVE;
+ dev_dbg(&i2c->dev, "MOUSE active\n");
+ if (analogue)
+ dev_dbg(&i2c->dev, "Analogue enabled\n");
+
+ return 0;
+}
+
+typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
+
+static struct {
+ enum wm2000_anc_mode source;
+ enum wm2000_anc_mode dest;
+ int analogue;
+ wm2000_mode_fn step[2];
+} anc_transitions[] = {
+ {
+ .source = ANC_OFF,
+ .dest = ANC_ACTIVE,
+ .analogue = 1,
+ .step = {
+ wm2000_power_up,
+ },
+ },
+ {
+ .source = ANC_OFF,
+ .dest = ANC_STANDBY,
+ .step = {
+ wm2000_power_up,
+ wm2000_enter_standby,
+ },
+ },
+ {
+ .source = ANC_OFF,
+ .dest = ANC_BYPASS,
+ .analogue = 1,
+ .step = {
+ wm2000_power_up,
+ wm2000_enter_bypass,
+ },
+ },
+ {
+ .source = ANC_ACTIVE,
+ .dest = ANC_BYPASS,
+ .analogue = 1,
+ .step = {
+ wm2000_enter_bypass,
+ },
+ },
+ {
+ .source = ANC_ACTIVE,
+ .dest = ANC_STANDBY,
+ .analogue = 1,
+ .step = {
+ wm2000_enter_standby,
+ },
+ },
+ {
+ .source = ANC_ACTIVE,
+ .dest = ANC_OFF,
+ .analogue = 1,
+ .step = {
+ wm2000_power_down,
+ },
+ },
+ {
+ .source = ANC_BYPASS,
+ .dest = ANC_ACTIVE,
+ .analogue = 1,
+ .step = {
+ wm2000_exit_bypass,
+ },
+ },
+ {
+ .source = ANC_BYPASS,
+ .dest = ANC_STANDBY,
+ .analogue = 1,
+ .step = {
+ wm2000_exit_bypass,
+ wm2000_enter_standby,
+ },
+ },
+ {
+ .source = ANC_BYPASS,
+ .dest = ANC_OFF,
+ .step = {
+ wm2000_exit_bypass,
+ wm2000_power_down,
+ },
+ },
+ {
+ .source = ANC_STANDBY,
+ .dest = ANC_ACTIVE,
+ .analogue = 1,
+ .step = {
+ wm2000_exit_standby,
+ },
+ },
+ {
+ .source = ANC_STANDBY,
+ .dest = ANC_BYPASS,
+ .analogue = 1,
+ .step = {
+ wm2000_exit_standby,
+ wm2000_enter_bypass,
+ },
+ },
+ {
+ .source = ANC_STANDBY,
+ .dest = ANC_OFF,
+ .step = {
+ wm2000_exit_standby,
+ wm2000_power_down,
+ },
+ },
+};
+
+static int wm2000_anc_transition(struct wm2000_priv *wm2000,
+ enum wm2000_anc_mode mode)
+{
+ struct i2c_client *i2c = wm2000->i2c;
+ int i, j;
+ int ret;
+
+ if (wm2000->anc_mode == mode)
+ return 0;
+
+ for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
+ if (anc_transitions[i].source == wm2000->anc_mode &&
+ anc_transitions[i].dest == mode)
+ break;
+ if (i == ARRAY_SIZE(anc_transitions)) {
+ dev_err(&i2c->dev, "No transition for %d->%d\n",
+ wm2000->anc_mode, mode);
+ return -EINVAL;
+ }
+
+ /* Maintain clock while active */
+ if (anc_transitions[i].source == ANC_OFF) {
+ ret = clk_prepare_enable(wm2000->mclk);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to enable MCLK: %d\n", ret);
+ return ret;
+ }
+ }
+
+ for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
+ if (!anc_transitions[i].step[j])
+ break;
+ ret = anc_transitions[i].step[j](i2c,
+ anc_transitions[i].analogue);
+ if (ret != 0)
+ return ret;
+ }
+
+ if (anc_transitions[i].dest == ANC_OFF)
+ clk_disable_unprepare(wm2000->mclk);
+
+ return ret;
+}
+
+static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
+{
+ struct i2c_client *i2c = wm2000->i2c;
+ enum wm2000_anc_mode mode;
+
+ if (wm2000->anc_eng_ena && wm2000->spk_ena)
+ if (wm2000->anc_active)
+ mode = ANC_ACTIVE;
+ else
+ mode = ANC_BYPASS;
+ else
+ mode = ANC_STANDBY;
+
+ dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
+ mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
+ wm2000->anc_active);
+
+ return wm2000_anc_transition(wm2000, mode);
+}
+
+static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+
+ ucontrol->value.integer.value[0] = wm2000->anc_active;
+
+ return 0;
+}
+
+static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+ int anc_active = ucontrol->value.integer.value[0];
+ int ret;
+
+ if (anc_active > 1)
+ return -EINVAL;
+
+ mutex_lock(&wm2000->lock);
+
+ wm2000->anc_active = anc_active;
+
+ ret = wm2000_anc_set_mode(wm2000);
+
+ mutex_unlock(&wm2000->lock);
+
+ return ret;
+}
+
+static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+
+ ucontrol->value.integer.value[0] = wm2000->spk_ena;
+
+ return 0;
+}
+
+static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+ int val = ucontrol->value.integer.value[0];
+ int ret;
+
+ if (val > 1)
+ return -EINVAL;
+
+ mutex_lock(&wm2000->lock);
+
+ wm2000->spk_ena = val;
+
+ ret = wm2000_anc_set_mode(wm2000);
+
+ mutex_unlock(&wm2000->lock);
+
+ return ret;
+}
+
+static const struct snd_kcontrol_new wm2000_controls[] = {
+ SOC_SINGLE("ANC Volume", WM2000_REG_ANC_GAIN_CTRL, 0, 255, 0),
+ SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
+ wm2000_anc_mode_get,
+ wm2000_anc_mode_put),
+ SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
+ wm2000_speaker_get,
+ wm2000_speaker_put),
+};
+
+static int wm2000_anc_power_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);
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+ int ret;
+
+ mutex_lock(&wm2000->lock);
+
+ if (SND_SOC_DAPM_EVENT_ON(event))
+ wm2000->anc_eng_ena = 1;
+
+ if (SND_SOC_DAPM_EVENT_OFF(event))
+ wm2000->anc_eng_ena = 0;
+
+ ret = wm2000_anc_set_mode(wm2000);
+
+ mutex_unlock(&wm2000->lock);
+
+ return ret;
+}
+
+static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
+/* Externally visible pins */
+SND_SOC_DAPM_OUTPUT("SPKN"),
+SND_SOC_DAPM_OUTPUT("SPKP"),
+
+SND_SOC_DAPM_INPUT("LINN"),
+SND_SOC_DAPM_INPUT("LINP"),
+
+SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
+ wm2000_anc_power_event,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+};
+
+/* Target, Path, Source */
+static const struct snd_soc_dapm_route wm2000_audio_map[] = {
+ { "SPKN", NULL, "ANC Engine" },
+ { "SPKP", NULL, "ANC Engine" },
+ { "ANC Engine", NULL, "LINN" },
+ { "ANC Engine", NULL, "LINP" },
+};
+
+#ifdef CONFIG_PM
+static int wm2000_suspend(struct snd_soc_codec *codec)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+
+ return wm2000_anc_transition(wm2000, ANC_OFF);
+}
+
+static int wm2000_resume(struct snd_soc_codec *codec)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+
+ return wm2000_anc_set_mode(wm2000);
+}
+#else
+#define wm2000_suspend NULL
+#define wm2000_resume NULL
+#endif
+
+static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case WM2000_REG_SYS_START:
+ case WM2000_REG_ANC_GAIN_CTRL:
+ case WM2000_REG_MSE_TH1:
+ case WM2000_REG_MSE_TH2:
+ case WM2000_REG_SPEECH_CLARITY:
+ case WM2000_REG_SYS_WATCHDOG:
+ case WM2000_REG_ANA_VMID_PD_TIME:
+ case WM2000_REG_ANA_VMID_PU_TIME:
+ case WM2000_REG_CAT_FLTR_INDX:
+ case WM2000_REG_CAT_GAIN_0:
+ case WM2000_REG_SYS_STATUS:
+ case WM2000_REG_SYS_MODE_CNTRL:
+ case WM2000_REG_SYS_START0:
+ case WM2000_REG_SYS_START1:
+ case WM2000_REG_ID1:
+ case WM2000_REG_ID2:
+ case WM2000_REG_REVISON:
+ case WM2000_REG_SYS_CTL1:
+ case WM2000_REG_SYS_CTL2:
+ case WM2000_REG_ANC_STAT:
+ case WM2000_REG_IF_CTL:
+ case WM2000_REG_ANA_MIC_CTL:
+ case WM2000_REG_SPK_CTL:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config wm2000_regmap = {
+ .reg_bits = 16,
+ .val_bits = 8,
+
+ .max_register = WM2000_REG_SPK_CTL,
+ .readable_reg = wm2000_readable_reg,
+};
+
+static int wm2000_probe(struct snd_soc_codec *codec)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+
+ /* This will trigger a transition to standby mode by default */
+ wm2000_anc_set_mode(wm2000);
+
+ return 0;
+}
+
+static int wm2000_remove(struct snd_soc_codec *codec)
+{
+ struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
+
+ return wm2000_anc_transition(wm2000, ANC_OFF);
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm2000 = {
+ .probe = wm2000_probe,
+ .remove = wm2000_remove,
+ .suspend = wm2000_suspend,
+ .resume = wm2000_resume,
+
+ .dapm_widgets = wm2000_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets),
+ .dapm_routes = wm2000_audio_map,
+ .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map),
+ .controls = wm2000_controls,
+ .num_controls = ARRAY_SIZE(wm2000_controls),
+};
+
+static int wm2000_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *i2c_id)
+{
+ struct wm2000_priv *wm2000;
+ struct wm2000_platform_data *pdata;
+ const char *filename;
+ const struct firmware *fw = NULL;
+ int ret, i;
+ int reg;
+ u16 id;
+
+ wm2000 = devm_kzalloc(&i2c->dev, sizeof(struct wm2000_priv),
+ GFP_KERNEL);
+ if (!wm2000)
+ return -ENOMEM;
+
+ mutex_init(&wm2000->lock);
+
+ dev_set_drvdata(&i2c->dev, wm2000);
+
+ wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
+ if (IS_ERR(wm2000->regmap)) {
+ ret = PTR_ERR(wm2000->regmap);
+ dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+ ret);
+ goto out;
+ }
+
+ for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
+ wm2000->supplies[i].supply = wm2000_supplies[i];
+
+ ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
+ wm2000->supplies);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+ return ret;
+ }
+
+ /* Verify that this is a WM2000 */
+ reg = wm2000_read(i2c, WM2000_REG_ID1);
+ id = reg << 8;
+ reg = wm2000_read(i2c, WM2000_REG_ID2);
+ id |= reg & 0xff;
+
+ if (id != 0x2000) {
+ dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
+ ret = -ENODEV;
+ goto err_supplies;
+ }
+
+ reg = wm2000_read(i2c, WM2000_REG_REVISON);
+ dev_info(&i2c->dev, "revision %c\n", reg + 'A');
+
+ wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK");
+ if (IS_ERR(wm2000->mclk)) {
+ ret = PTR_ERR(wm2000->mclk);
+ dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret);
+ goto err_supplies;
+ }
+
+ filename = "wm2000_anc.bin";
+ pdata = dev_get_platdata(&i2c->dev);
+ if (pdata) {
+ wm2000->speech_clarity = !pdata->speech_enh_disable;
+
+ if (pdata->download_file)
+ filename = pdata->download_file;
+ }
+
+ ret = request_firmware(&fw, filename, &i2c->dev);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
+ goto err_supplies;
+ }
+
+ /* Pre-cook the concatenation of the register address onto the image */
+ wm2000->anc_download_size = fw->size + 2;
+ wm2000->anc_download = devm_kzalloc(&i2c->dev,
+ wm2000->anc_download_size,
+ GFP_KERNEL);
+ if (wm2000->anc_download == NULL) {
+ dev_err(&i2c->dev, "Out of memory\n");
+ ret = -ENOMEM;
+ goto err_supplies;
+ }
+
+ wm2000->anc_download[0] = 0x80;
+ wm2000->anc_download[1] = 0x00;
+ memcpy(wm2000->anc_download + 2, fw->data, fw->size);
+
+ wm2000->anc_eng_ena = 1;
+ wm2000->anc_active = 1;
+ wm2000->spk_ena = 1;
+ wm2000->i2c = i2c;
+
+ wm2000_reset(wm2000);
+
+ ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);
+
+err_supplies:
+ regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+
+out:
+ release_firmware(fw);
+ return ret;
+}
+
+static int wm2000_i2c_remove(struct i2c_client *i2c)
+{
+ snd_soc_unregister_codec(&i2c->dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id wm2000_i2c_id[] = {
+ { "wm2000", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
+
+static struct i2c_driver wm2000_i2c_driver = {
+ .driver = {
+ .name = "wm2000",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm2000_i2c_probe,
+ .remove = wm2000_i2c_remove,
+ .id_table = wm2000_i2c_id,
+};
+
+module_i2c_driver(wm2000_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC WM2000 driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff