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extcon-arizona.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* extcon-arizona.c - Extcon driver Wolfson Arizona devices
*
* Copyright (C) 2012-2014 Wolfson Microelectronics plc
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/extcon-provider.h>
#include <sound/soc.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>
#include <dt-bindings/mfd/arizona.h>
#define ARIZONA_MAX_MICD_RANGE 8
#define ARIZONA_MICD_CLAMP_MODE_JDL 0x4
#define ARIZONA_MICD_CLAMP_MODE_JDH 0x5
#define ARIZONA_MICD_CLAMP_MODE_JDL_GP5H 0x9
#define ARIZONA_MICD_CLAMP_MODE_JDH_GP5H 0xb
#define ARIZONA_TST_CAP_DEFAULT 0x3
#define ARIZONA_TST_CAP_CLAMP 0x1
#define ARIZONA_HPDET_MAX 10000
#define HPDET_DEBOUNCE 500
#define DEFAULT_MICD_TIMEOUT 2000
#define ARIZONA_HPDET_WAIT_COUNT 15
#define ARIZONA_HPDET_WAIT_DELAY_MS 20
#define QUICK_HEADPHONE_MAX_OHM 3
#define MICROPHONE_MIN_OHM 1257
#define MICROPHONE_MAX_OHM 30000
#define MICD_DBTIME_TWO_READINGS 2
#define MICD_DBTIME_FOUR_READINGS 4
#define MICD_LVL_1_TO_7 (ARIZONA_MICD_LVL_1 | ARIZONA_MICD_LVL_2 | \
ARIZONA_MICD_LVL_3 | ARIZONA_MICD_LVL_4 | \
ARIZONA_MICD_LVL_5 | ARIZONA_MICD_LVL_6 | \
ARIZONA_MICD_LVL_7)
#define MICD_LVL_0_TO_7 (ARIZONA_MICD_LVL_0 | MICD_LVL_1_TO_7)
#define MICD_LVL_0_TO_8 (MICD_LVL_0_TO_7 | ARIZONA_MICD_LVL_8)
struct arizona_extcon_info {
struct device *dev;
struct arizona *arizona;
struct mutex lock;
struct regulator *micvdd;
struct input_dev *input;
u16 last_jackdet;
int micd_mode;
const struct arizona_micd_config *micd_modes;
int micd_num_modes;
const struct arizona_micd_range *micd_ranges;
int num_micd_ranges;
bool micd_reva;
bool micd_clamp;
struct delayed_work hpdet_work;
struct delayed_work micd_detect_work;
struct delayed_work micd_timeout_work;
bool hpdet_active;
bool hpdet_done;
bool hpdet_retried;
int num_hpdet_res;
unsigned int hpdet_res[3];
bool mic;
bool detecting;
int jack_flips;
int hpdet_ip_version;
struct extcon_dev *edev;
struct gpio_desc *micd_pol_gpio;
};
static const struct arizona_micd_config micd_default_modes[] = {
{ ARIZONA_ACCDET_SRC, 1, 0 },
{ 0, 2, 1 },
};
static const struct arizona_micd_range micd_default_ranges[] = {
{ .max = 11, .key = BTN_0 },
{ .max = 28, .key = BTN_1 },
{ .max = 54, .key = BTN_2 },
{ .max = 100, .key = BTN_3 },
{ .max = 186, .key = BTN_4 },
{ .max = 430, .key = BTN_5 },
};
/* The number of levels in arizona_micd_levels valid for button thresholds */
#define ARIZONA_NUM_MICD_BUTTON_LEVELS 64
static const int arizona_micd_levels[] = {
3, 6, 8, 11, 13, 16, 18, 21, 23, 26, 28, 31, 34, 36, 39, 41, 44, 46,
49, 52, 54, 57, 60, 62, 65, 67, 70, 73, 75, 78, 81, 83, 89, 94, 100,
105, 111, 116, 122, 127, 139, 150, 161, 173, 186, 196, 209, 220, 245,
270, 295, 321, 348, 375, 402, 430, 489, 550, 614, 681, 752, 903, 1071,
1257, 30000,
};
static const unsigned int arizona_cable[] = {
EXTCON_MECHANICAL,
EXTCON_JACK_MICROPHONE,
EXTCON_JACK_HEADPHONE,
EXTCON_JACK_LINE_OUT,
EXTCON_NONE,
};
static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info);
static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info,
bool clamp)
{
struct arizona *arizona = info->arizona;
unsigned int mask = 0, val = 0;
unsigned int cap_sel = 0;
int ret;
switch (arizona->type) {
case WM8998:
case WM1814:
mask = 0;
break;
case WM5110:
case WM8280:
mask = ARIZONA_HP1L_SHRTO | ARIZONA_HP1L_FLWR |
ARIZONA_HP1L_SHRTI;
if (clamp) {
val = ARIZONA_HP1L_SHRTO;
cap_sel = ARIZONA_TST_CAP_CLAMP;
} else {
val = ARIZONA_HP1L_FLWR | ARIZONA_HP1L_SHRTI;
cap_sel = ARIZONA_TST_CAP_DEFAULT;
}
ret = regmap_update_bits(arizona->regmap,
ARIZONA_HP_TEST_CTRL_1,
ARIZONA_HP1_TST_CAP_SEL_MASK,
cap_sel);
if (ret != 0)
dev_warn(arizona->dev,
"Failed to set TST_CAP_SEL: %d\n", ret);
break;
default:
mask = ARIZONA_RMV_SHRT_HP1L;
if (clamp)
val = ARIZONA_RMV_SHRT_HP1L;
break;
}
snd_soc_dapm_mutex_lock(arizona->dapm);
arizona->hpdet_clamp = clamp;
/* Keep the HP output stages disabled while doing the clamp */
if (clamp) {
ret = regmap_update_bits(arizona->regmap,
ARIZONA_OUTPUT_ENABLES_1,
ARIZONA_OUT1L_ENA |
ARIZONA_OUT1R_ENA, 0);
if (ret != 0)
dev_warn(arizona->dev,
"Failed to disable headphone outputs: %d\n",
ret);
}
if (mask) {
ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1L,
mask, val);
if (ret != 0)
dev_warn(arizona->dev, "Failed to do clamp: %d\n",
ret);
ret = regmap_update_bits(arizona->regmap, ARIZONA_HP_CTRL_1R,
mask, val);
if (ret != 0)
dev_warn(arizona->dev, "Failed to do clamp: %d\n",
ret);
}
/* Restore the desired state while not doing the clamp */
if (!clamp) {
ret = regmap_update_bits(arizona->regmap,
ARIZONA_OUTPUT_ENABLES_1,
ARIZONA_OUT1L_ENA |
ARIZONA_OUT1R_ENA, arizona->hp_ena);
if (ret != 0)
dev_warn(arizona->dev,
"Failed to restore headphone outputs: %d\n",
ret);
}
snd_soc_dapm_mutex_unlock(arizona->dapm);
}
static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
{
struct arizona *arizona = info->arizona;
mode %= info->micd_num_modes;
gpiod_set_value_cansleep(info->micd_pol_gpio,
info->micd_modes[mode].gpio);
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_BIAS_SRC_MASK,
info->micd_modes[mode].bias <<
ARIZONA_MICD_BIAS_SRC_SHIFT);
regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
info->micd_mode = mode;
dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
}
static const char *arizona_extcon_get_micbias(struct arizona_extcon_info *info)
{
switch (info->micd_modes[0].bias) {
case 1:
return "MICBIAS1";
case 2:
return "MICBIAS2";
case 3:
return "MICBIAS3";
default:
return "MICVDD";
}
}
static void arizona_extcon_pulse_micbias(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
const char *widget = arizona_extcon_get_micbias(info);
struct snd_soc_dapm_context *dapm = arizona->dapm;
struct snd_soc_component *component = snd_soc_dapm_to_component(dapm);
int ret;
ret = snd_soc_component_force_enable_pin(component, widget);
if (ret != 0)
dev_warn(arizona->dev, "Failed to enable %s: %d\n",
widget, ret);
snd_soc_dapm_sync(dapm);
if (!arizona->pdata.micd_force_micbias) {
ret = snd_soc_component_disable_pin(component, widget);
if (ret != 0)
dev_warn(arizona->dev, "Failed to disable %s: %d\n",
widget, ret);
snd_soc_dapm_sync(dapm);
}
}
static void arizona_start_mic(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
bool change;
int ret;
unsigned int mode;
/* Microphone detection can't use idle mode */
pm_runtime_get(info->dev);
if (info->detecting) {
ret = regulator_allow_bypass(info->micvdd, false);
if (ret != 0) {
dev_err(arizona->dev,
"Failed to regulate MICVDD: %d\n",
ret);
}
}
ret = regulator_enable(info->micvdd);
if (ret != 0) {
dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
ret);
}
if (info->micd_reva) {
const struct reg_sequence reva[] = {
{ 0x80, 0x3 },
{ 0x294, 0x0 },
{ 0x80, 0x0 },
};
regmap_multi_reg_write(arizona->regmap, reva, ARRAY_SIZE(reva));
}
if (info->detecting && arizona->pdata.micd_software_compare)
mode = ARIZONA_ACCDET_MODE_ADC;
else
mode = ARIZONA_ACCDET_MODE_MIC;
regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK, mode);
arizona_extcon_pulse_micbias(info);
ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
&change);
if (ret < 0) {
dev_err(arizona->dev, "Failed to enable micd: %d\n", ret);
} else if (!change) {
regulator_disable(info->micvdd);
pm_runtime_put_autosuspend(info->dev);
}
}
static void arizona_stop_mic(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
const char *widget = arizona_extcon_get_micbias(info);
struct snd_soc_dapm_context *dapm = arizona->dapm;
struct snd_soc_component *component = snd_soc_dapm_to_component(dapm);
bool change = false;
int ret;
ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, 0,
&change);
if (ret < 0)
dev_err(arizona->dev, "Failed to disable micd: %d\n", ret);
ret = snd_soc_component_disable_pin(component, widget);
if (ret != 0)
dev_warn(arizona->dev,
"Failed to disable %s: %d\n",
widget, ret);
snd_soc_dapm_sync(dapm);
if (info->micd_reva) {
const struct reg_sequence reva[] = {
{ 0x80, 0x3 },
{ 0x294, 0x2 },
{ 0x80, 0x0 },
};
regmap_multi_reg_write(arizona->regmap, reva, ARRAY_SIZE(reva));
}
ret = regulator_allow_bypass(info->micvdd, true);
if (ret != 0) {
dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
ret);
}
if (change) {
regulator_disable(info->micvdd);
pm_runtime_mark_last_busy(info->dev);
pm_runtime_put_autosuspend(info->dev);
}
}
static struct {
unsigned int threshold;
unsigned int factor_a;
unsigned int factor_b;
} arizona_hpdet_b_ranges[] = {
{ 100, 5528, 362464 },
{ 169, 11084, 6186851 },
{ 169, 11065, 65460395 },
};
#define ARIZONA_HPDET_B_RANGE_MAX 0x3fb
static struct {
int min;
int max;
} arizona_hpdet_c_ranges[] = {
{ 0, 30 },
{ 8, 100 },
{ 100, 1000 },
{ 1000, 10000 },
};
static int arizona_hpdet_read(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
unsigned int val, range;
int ret;
ret = regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_2, &val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read HPDET status: %d\n",
ret);
return ret;
}
switch (info->hpdet_ip_version) {
case 0:
if (!(val & ARIZONA_HP_DONE)) {
dev_err(arizona->dev, "HPDET did not complete: %x\n",
val);
return -EAGAIN;
}
val &= ARIZONA_HP_LVL_MASK;
break;
case 1:
if (!(val & ARIZONA_HP_DONE_B)) {
dev_err(arizona->dev, "HPDET did not complete: %x\n",
val);
return -EAGAIN;
}
ret = regmap_read(arizona->regmap, ARIZONA_HP_DACVAL, &val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read HP value: %d\n",
ret);
return -EAGAIN;
}
regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
&range);
range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
>> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 &&
(val < arizona_hpdet_b_ranges[range].threshold ||
val >= ARIZONA_HPDET_B_RANGE_MAX)) {
range++;
dev_dbg(arizona->dev, "Moving to HPDET range %d\n",
range);
regmap_update_bits(arizona->regmap,
ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_IMPEDANCE_RANGE_MASK,
range <<
ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
return -EAGAIN;
}
/* If we go out of range report top of range */
if (val < arizona_hpdet_b_ranges[range].threshold ||
val >= ARIZONA_HPDET_B_RANGE_MAX) {
dev_dbg(arizona->dev, "Measurement out of range\n");
return ARIZONA_HPDET_MAX;
}
dev_dbg(arizona->dev, "HPDET read %d in range %d\n",
val, range);
val = arizona_hpdet_b_ranges[range].factor_b
/ ((val * 100) -
arizona_hpdet_b_ranges[range].factor_a);
break;
case 2:
if (!(val & ARIZONA_HP_DONE_B)) {
dev_err(arizona->dev, "HPDET did not complete: %x\n",
val);
return -EAGAIN;
}
val &= ARIZONA_HP_LVL_B_MASK;
/* Convert to ohms, the value is in 0.5 ohm increments */
val /= 2;
regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
&range);
range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
>> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
/* Skip up a range, or report? */
if (range < ARRAY_SIZE(arizona_hpdet_c_ranges) - 1 &&
(val >= arizona_hpdet_c_ranges[range].max)) {
range++;
dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
arizona_hpdet_c_ranges[range].min,
arizona_hpdet_c_ranges[range].max);
regmap_update_bits(arizona->regmap,
ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_IMPEDANCE_RANGE_MASK,
range <<
ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
return -EAGAIN;
}
if (range && (val < arizona_hpdet_c_ranges[range].min)) {
dev_dbg(arizona->dev, "Reporting range boundary %d\n",
arizona_hpdet_c_ranges[range].min);
val = arizona_hpdet_c_ranges[range].min;
}
break;
default:
dev_warn(arizona->dev, "Unknown HPDET IP revision %d\n",
info->hpdet_ip_version);
return -EINVAL;
}
dev_dbg(arizona->dev, "HP impedance %d ohms\n", val);
return val;
}
static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading,
bool *mic)
{
struct arizona *arizona = info->arizona;
int id_gpio = arizona->pdata.hpdet_id_gpio;
if (!arizona->pdata.hpdet_acc_id)
return 0;
/*
* If we're using HPDET for accessory identification we need
* to take multiple measurements, step through them in sequence.
*/
info->hpdet_res[info->num_hpdet_res++] = *reading;
/* Only check the mic directly if we didn't already ID it */
if (id_gpio && info->num_hpdet_res == 1) {
dev_dbg(arizona->dev, "Measuring mic\n");
regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK |
ARIZONA_ACCDET_SRC,
ARIZONA_ACCDET_MODE_HPR |
info->micd_modes[0].src);
gpio_set_value_cansleep(id_gpio, 1);
regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_POLL, ARIZONA_HP_POLL);
return -EAGAIN;
}
/* OK, got both. Now, compare... */
dev_dbg(arizona->dev, "HPDET measured %d %d\n",
info->hpdet_res[0], info->hpdet_res[1]);
/* Take the headphone impedance for the main report */
*reading = info->hpdet_res[0];
/* Sometimes we get false readings due to slow insert */
if (*reading >= ARIZONA_HPDET_MAX && !info->hpdet_retried) {
dev_dbg(arizona->dev, "Retrying high impedance\n");
info->num_hpdet_res = 0;
info->hpdet_retried = true;
arizona_start_hpdet_acc_id(info);
pm_runtime_put(info->dev);
return -EAGAIN;
}
/*
* If we measure the mic as high impedance
*/
if (!id_gpio || info->hpdet_res[1] > 50) {
dev_dbg(arizona->dev, "Detected mic\n");
*mic = true;
info->detecting = true;
} else {
dev_dbg(arizona->dev, "Detected headphone\n");
}
/* Make sure everything is reset back to the real polarity */
regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_SRC, info->micd_modes[0].src);
return 0;
}
static irqreturn_t arizona_hpdet_irq(int irq, void *data)
{
struct arizona_extcon_info *info = data;
struct arizona *arizona = info->arizona;
int id_gpio = arizona->pdata.hpdet_id_gpio;
unsigned int report = EXTCON_JACK_HEADPHONE;
int ret, reading;
bool mic = false;
mutex_lock(&info->lock);
/* If we got a spurious IRQ for some reason then ignore it */
if (!info->hpdet_active) {
dev_warn(arizona->dev, "Spurious HPDET IRQ\n");
mutex_unlock(&info->lock);
return IRQ_NONE;
}
/* If the cable was removed while measuring ignore the result */
ret = extcon_get_state(info->edev, EXTCON_MECHANICAL);
if (ret < 0) {
dev_err(arizona->dev, "Failed to check cable state: %d\n",
ret);
goto out;
} else if (!ret) {
dev_dbg(arizona->dev, "Ignoring HPDET for removed cable\n");
goto done;
}
ret = arizona_hpdet_read(info);
if (ret == -EAGAIN)
goto out;
else if (ret < 0)
goto done;
reading = ret;
/* Reset back to starting range */
regmap_update_bits(arizona->regmap,
ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
0);
ret = arizona_hpdet_do_id(info, &reading, &mic);
if (ret == -EAGAIN)
goto out;
else if (ret < 0)
goto done;
/* Report high impedence cables as line outputs */
if (reading >= 5000)
report = EXTCON_JACK_LINE_OUT;
else
report = EXTCON_JACK_HEADPHONE;
ret = extcon_set_state_sync(info->edev, report, true);
if (ret != 0)
dev_err(arizona->dev, "Failed to report HP/line: %d\n",
ret);
done:
/* Reset back to starting range */
regmap_update_bits(arizona->regmap,
ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
0);
arizona_extcon_hp_clamp(info, false);
if (id_gpio)
gpio_set_value_cansleep(id_gpio, 0);
/* If we have a mic then reenable MICDET */
if (mic || info->mic)
arizona_start_mic(info);
if (info->hpdet_active) {
pm_runtime_put_autosuspend(info->dev);
info->hpdet_active = false;
}
info->hpdet_done = true;
out:
mutex_unlock(&info->lock);
return IRQ_HANDLED;
}
static void arizona_identify_headphone(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
int ret;
if (info->hpdet_done)
return;
dev_dbg(arizona->dev, "Starting HPDET\n");
/* Make sure we keep the device enabled during the measurement */
pm_runtime_get(info->dev);
info->hpdet_active = true;
arizona_stop_mic(info);
arizona_extcon_hp_clamp(info, true);
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK,
arizona->pdata.hpdet_channel);
if (ret != 0) {
dev_err(arizona->dev, "Failed to set HPDET mode: %d\n", ret);
goto err;
}
ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_POLL, ARIZONA_HP_POLL);
if (ret != 0) {
dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n",
ret);
goto err;
}
return;
err:
arizona_extcon_hp_clamp(info, false);
pm_runtime_put_autosuspend(info->dev);
/* Just report headphone */
ret = extcon_set_state_sync(info->edev, EXTCON_JACK_HEADPHONE, true);
if (ret != 0)
dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
if (info->mic)
arizona_start_mic(info);
info->hpdet_active = false;
}
static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
int hp_reading = 32;
bool mic;
int ret;
dev_dbg(arizona->dev, "Starting identification via HPDET\n");
/* Make sure we keep the device enabled during the measurement */
pm_runtime_get_sync(info->dev);
info->hpdet_active = true;
arizona_extcon_hp_clamp(info, true);
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_SRC | ARIZONA_ACCDET_MODE_MASK,
info->micd_modes[0].src |
arizona->pdata.hpdet_channel);
if (ret != 0) {
dev_err(arizona->dev, "Failed to set HPDET mode: %d\n", ret);
goto err;
}
if (arizona->pdata.hpdet_acc_id_line) {
ret = regmap_update_bits(arizona->regmap,
ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_POLL, ARIZONA_HP_POLL);
if (ret != 0) {
dev_err(arizona->dev,
"Can't start HPDETL measurement: %d\n",
ret);
goto err;
}
} else {
arizona_hpdet_do_id(info, &hp_reading, &mic);
}
return;
err:
/* Just report headphone */
ret = extcon_set_state_sync(info->edev, EXTCON_JACK_HEADPHONE, true);
if (ret != 0)
dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
info->hpdet_active = false;
}
static void arizona_micd_timeout_work(struct work_struct *work)
{
struct arizona_extcon_info *info = container_of(work,
struct arizona_extcon_info,
micd_timeout_work.work);
mutex_lock(&info->lock);
dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n");
info->detecting = false;
arizona_identify_headphone(info);
mutex_unlock(&info->lock);
}
static int arizona_micd_adc_read(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
unsigned int val;
int ret;
/* Must disable MICD before we read the ADCVAL */
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, 0);
ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_4, &val);
if (ret != 0) {
dev_err(arizona->dev,
"Failed to read MICDET_ADCVAL: %d\n", ret);
return ret;
}
dev_dbg(arizona->dev, "MICDET_ADCVAL: %x\n", val);
val &= ARIZONA_MICDET_ADCVAL_MASK;
if (val < ARRAY_SIZE(arizona_micd_levels))
val = arizona_micd_levels[val];
else
val = INT_MAX;
if (val <= QUICK_HEADPHONE_MAX_OHM)
val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_0;
else if (val <= MICROPHONE_MIN_OHM)
val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_1;
else if (val <= MICROPHONE_MAX_OHM)
val = ARIZONA_MICD_STS | ARIZONA_MICD_LVL_8;
else
val = ARIZONA_MICD_LVL_8;
return val;
}
static int arizona_micd_read(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
unsigned int val = 0;
int ret, i;
for (i = 0; i < 10 && !(val & MICD_LVL_0_TO_8); i++) {
ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
if (ret != 0) {
dev_err(arizona->dev,
"Failed to read MICDET: %d\n", ret);
return ret;
}
dev_dbg(arizona->dev, "MICDET: %x\n", val);
if (!(val & ARIZONA_MICD_VALID)) {
dev_warn(arizona->dev,
"Microphone detection state invalid\n");
return -EINVAL;
}
}
if (i == 10 && !(val & MICD_LVL_0_TO_8)) {
dev_err(arizona->dev, "Failed to get valid MICDET value\n");
return -EINVAL;
}
return val;
}
static int arizona_micdet_reading(void *priv)
{
struct arizona_extcon_info *info = priv;
struct arizona *arizona = info->arizona;
int ret, val;
if (info->detecting && arizona->pdata.micd_software_compare)
ret = arizona_micd_adc_read(info);
else
ret = arizona_micd_read(info);
if (ret < 0)
return ret;
val = ret;
/* Due to jack detect this should never happen */
if (!(val & ARIZONA_MICD_STS)) {
dev_warn(arizona->dev, "Detected open circuit\n");
info->mic = false;
info->detecting = false;
arizona_identify_headphone(info);
return 0;
}
/* If we got a high impedence we should have a headset, report it. */
if (val & ARIZONA_MICD_LVL_8) {
info->mic = true;
info->detecting = false;
arizona_identify_headphone(info);
ret = extcon_set_state_sync(info->edev,
EXTCON_JACK_MICROPHONE, true);
if (ret != 0)
dev_err(arizona->dev, "Headset report failed: %d\n",
ret);
/* Don't need to regulate for button detection */
ret = regulator_allow_bypass(info->micvdd, true);
if (ret != 0) {
dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
ret);
}
return 0;
}
/* If we detected a lower impedence during initial startup
* then we probably have the wrong polarity, flip it. Don't
* do this for the lowest impedences to speed up detection of
* plain headphones. If both polarities report a low
* impedence then give up and report headphones.
*/
if (val & MICD_LVL_1_TO_7) {
if (info->jack_flips >= info->micd_num_modes * 10) {
dev_dbg(arizona->dev, "Detected HP/line\n");
info->detecting = false;
arizona_identify_headphone(info);
} else {
info->micd_mode++;
if (info->micd_mode == info->micd_num_modes)
info->micd_mode = 0;
arizona_extcon_set_mode(info, info->micd_mode);
info->jack_flips++;
if (arizona->pdata.micd_software_compare)
regmap_update_bits(arizona->regmap,
ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA,
ARIZONA_MICD_ENA);
queue_delayed_work(system_power_efficient_wq,
&info->micd_timeout_work,
msecs_to_jiffies(arizona->pdata.micd_timeout));
}
return 0;
}
/*
* If we're still detecting and we detect a short then we've
* got a headphone.
*/
dev_dbg(arizona->dev, "Headphone detected\n");
info->detecting = false;
arizona_identify_headphone(info);
return 0;
}
static int arizona_button_reading(void *priv)
{
struct arizona_extcon_info *info = priv;
struct arizona *arizona = info->arizona;
int val, key, lvl, i;
val = arizona_micd_read(info);
if (val < 0)
return val;
/*
* If we're still detecting and we detect a short then we've
* got a headphone. Otherwise it's a button press.
*/
if (val & MICD_LVL_0_TO_7) {
if (info->mic) {
dev_dbg(arizona->dev, "Mic button detected\n");
lvl = val & ARIZONA_MICD_LVL_MASK;
lvl >>= ARIZONA_MICD_LVL_SHIFT;
for (i = 0; i < info->num_micd_ranges; i++)
input_report_key(info->input,
info->micd_ranges[i].key, 0);
if (lvl && ffs(lvl) - 1 < info->num_micd_ranges) {
key = info->micd_ranges[ffs(lvl) - 1].key;
input_report_key(info->input, key, 1);
input_sync(info->input);
} else {
dev_err(arizona->dev, "Button out of range\n");
}