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linux/drivers/extcon/extcon-arizona.c
Mark Brown 6fed4d869a extcon: arizona: Allow configuration of button detection 
The Arizona button detection circuit is configurable, allowing the system
integrator to program a range of thresholds for the buttons supported on
the accessory but currently the driver uses the default button ranges and
does not provide any flexibility in how this is exposed to the application
layer.

Provide platform data allowing the user to control this and to map
the buttons to keys in the input subsystem.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-04-02 11:53:51 +01:00

1344 lines
34 KiB
C
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/*
* extcon-arizona.c - Extcon driver Wolfson Arizona devices
*
* Copyright (C) 2012 Wolfson Microelectronics plc
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#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.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/extcon.h>
#include <sound/soc.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>
#define ARIZONA_MAX_MICD_RANGE 8
#define ARIZONA_ACCDET_MODE_MIC 0
#define ARIZONA_ACCDET_MODE_HPL 1
#define ARIZONA_ACCDET_MODE_HPR 2
struct arizona_extcon_info {
struct device *dev;
struct arizona *arizona;
struct mutex lock;
struct regulator *micvdd;
struct input_dev *input;
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;
bool hpdet_active;
bool hpdet_done;
int num_hpdet_res;
unsigned int hpdet_res[3];
bool mic;
bool detecting;
int jack_flips;
int hpdet_ip;
struct extcon_dev edev;
};
static const struct arizona_micd_config micd_default_modes[] = {
{ ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
{ 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 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 },
};
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,
};
#define ARIZONA_CABLE_MECHANICAL 0
#define ARIZONA_CABLE_MICROPHONE 1
#define ARIZONA_CABLE_HEADPHONE 2
#define ARIZONA_CABLE_LINEOUT 3
static const char *arizona_cable[] = {
"Mechanical",
"Microphone",
"Headphone",
"Line-out",
NULL,
};
static void arizona_extcon_do_magic(struct arizona_extcon_info *info,
unsigned int magic)
{
struct arizona *arizona = info->arizona;
int ret;
mutex_lock(&arizona->dapm->card->dapm_mutex);
arizona->hpdet_magic = magic;
/* Keep the HP output stages disabled while doing the magic */
if (magic) {
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);
}
ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000,
magic);
if (ret != 0)
dev_warn(arizona->dev, "Failed to do magic: %d\n",
ret);
ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000,
magic);
if (ret != 0)
dev_warn(arizona->dev, "Failed to do magic: %d\n",
ret);
/* Restore the desired state while not doing the magic */
if (!magic) {
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);
}
mutex_unlock(&arizona->dapm->card->dapm_mutex);
}
static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
{
struct arizona *arizona = info->arizona;
mode %= info->micd_num_modes;
if (arizona->pdata.micd_pol_gpio > 0)
gpio_set_value_cansleep(arizona->pdata.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);
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 >> ARIZONA_MICD_BIAS_SRC_SHIFT) {
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;
int ret;
mutex_lock(&dapm->card->dapm_mutex);
ret = snd_soc_dapm_force_enable_pin(dapm, widget);
if (ret != 0)
dev_warn(arizona->dev, "Failed to enable %s: %d\n",
widget, ret);
mutex_unlock(&dapm->card->dapm_mutex);
snd_soc_dapm_sync(dapm);
if (!arizona->pdata.micd_force_micbias) {
mutex_lock(&dapm->card->dapm_mutex);
ret = snd_soc_dapm_disable_pin(arizona->dapm, widget);
if (ret != 0)
dev_warn(arizona->dev, "Failed to disable %s: %d\n",
widget, ret);
mutex_unlock(&dapm->card->dapm_mutex);
snd_soc_dapm_sync(dapm);
}
}
static void arizona_start_mic(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
bool change;
int ret;
/* 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) {
regmap_write(arizona->regmap, 0x80, 0x3);
regmap_write(arizona->regmap, 0x294, 0);
regmap_write(arizona->regmap, 0x80, 0x0);
}
regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
arizona_extcon_pulse_micbias(info);
regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
&change);
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;
bool change;
int ret;
regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, 0,
&change);
mutex_lock(&dapm->card->dapm_mutex);
ret = snd_soc_dapm_disable_pin(dapm, widget);
if (ret != 0)
dev_warn(arizona->dev,
"Failed to disable %s: %d\n",
widget, ret);
mutex_unlock(&dapm->card->dapm_mutex);
snd_soc_dapm_sync(dapm);
if (info->micd_reva) {
regmap_write(arizona->regmap, 0x80, 0x3);
regmap_write(arizona->regmap, 0x294, 2);
regmap_write(arizona->regmap, 0x80, 0x0);
}
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 factor_a;
unsigned int factor_b;
} arizona_hpdet_b_ranges[] = {
{ 5528, 362464 },
{ 11084, 6186851 },
{ 11065, 65460395 },
};
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) {
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 < 100 || val > 0x3fb)) {
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 < 100 || val > 0x3fb) {
dev_dbg(arizona->dev, "Measurement out of range\n");
return 10000;
}
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;
default:
dev_warn(arizona->dev, "Unknown HPDET IP revision %d\n",
info->hpdet_ip);
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;
regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
&range);
range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
>> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
/* Skip up or down a range? */
if (range && (val < arizona_hpdet_c_ranges[range].min)) {
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 < 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;
}
}
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)
{
struct arizona *arizona = info->arizona;
int id_gpio = arizona->pdata.hpdet_id_gpio;
/*
* If we're using HPDET for accessory identification we need
* to take multiple measurements, step through them in sequence.
*/
if (arizona->pdata.hpdet_acc_id) {
info->hpdet_res[info->num_hpdet_res++] = *reading;
/*
* If the impedence is too high don't measure the
* second ground.
*/
if (info->num_hpdet_res == 1 && *reading >= 45) {
dev_dbg(arizona->dev, "Skipping ground flip\n");
info->hpdet_res[info->num_hpdet_res++] = *reading;
}
if (info->num_hpdet_res == 1) {
dev_dbg(arizona->dev, "Flipping ground\n");
regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_SRC,
~info->micd_modes[0].src);
regmap_update_bits(arizona->regmap,
ARIZONA_HEADPHONE_DETECT_1,
ARIZONA_HP_POLL, ARIZONA_HP_POLL);
return -EAGAIN;
}
/* Only check the mic directly if we didn't already ID it */
if (id_gpio && info->num_hpdet_res == 2 &&
!((info->hpdet_res[0] > info->hpdet_res[1] * 2))) {
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 %d\n",
info->hpdet_res[0], info->hpdet_res[1],
info->hpdet_res[2]);
/* Take the headphone impedance for the main report */
*reading = info->hpdet_res[0];
/*
* Either the two grounds measure differently or we
* measure the mic as high impedance.
*/
if ((info->hpdet_res[0] > info->hpdet_res[1] * 2) ||
(id_gpio && info->hpdet_res[2] > 10)) {
dev_dbg(arizona->dev, "Detected mic\n");
info->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;
int report = ARIZONA_CABLE_HEADPHONE;
int ret, reading;
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_cable_state_(&info->edev, ARIZONA_CABLE_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);
if (ret == -EAGAIN) {
goto out;
} else if (ret < 0) {
goto done;
}
/* Report high impedence cables as line outputs */
if (reading >= 5000)
report = ARIZONA_CABLE_LINEOUT;
else
report = ARIZONA_CABLE_HEADPHONE;
ret = extcon_set_cable_state_(&info->edev, report, true);
if (ret != 0)
dev_err(arizona->dev, "Failed to report HP/line: %d\n",
ret);
arizona_extcon_do_magic(info, 0);
done:
if (id_gpio)
gpio_set_value_cansleep(id_gpio, 0);
/* Revert back to MICDET mode */
regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
/* If we have a mic then reenable MICDET */
if (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;
if (info->mic)
arizona_stop_mic(info);
arizona_extcon_do_magic(info, 0x4000);
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK,
ARIZONA_ACCDET_MODE_HPL);
if (ret != 0) {
dev_err(arizona->dev, "Failed to set HPDETL 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:
regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
/* Just report headphone */
ret = extcon_update_state(&info->edev,
1 << ARIZONA_CABLE_HEADPHONE,
1 << ARIZONA_CABLE_HEADPHONE);
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 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_pulse_micbias(info);
arizona_extcon_do_magic(info, 0x4000);
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_SRC | ARIZONA_ACCDET_MODE_MASK,
info->micd_modes[0].src |
ARIZONA_ACCDET_MODE_HPL);
if (ret != 0) {
dev_err(arizona->dev, "Failed to set HPDETL 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:
regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
/* Just report headphone */
ret = extcon_update_state(&info->edev,
1 << ARIZONA_CABLE_HEADPHONE,
1 << ARIZONA_CABLE_HEADPHONE);
if (ret != 0)
dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
info->hpdet_active = false;
}
static irqreturn_t arizona_micdet(int irq, void *data)
{
struct arizona_extcon_info *info = data;
struct arizona *arizona = info->arizona;
unsigned int val, lvl;
int ret, i, key;
mutex_lock(&info->lock);
ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
mutex_unlock(&info->lock);
return IRQ_NONE;
}
dev_dbg(arizona->dev, "MICDET: %x\n", val);
if (!(val & ARIZONA_MICD_VALID)) {
dev_warn(arizona->dev, "Microphone detection state invalid\n");
mutex_unlock(&info->lock);
return IRQ_NONE;
}
/* Due to jack detect this should never happen */
if (!(val & ARIZONA_MICD_STS)) {
dev_warn(arizona->dev, "Detected open circuit\n");
info->detecting = false;
goto handled;
}
/* If we got a high impedence we should have a headset, report it. */
if (info->detecting && (val & 0x400)) {
arizona_identify_headphone(info);
ret = extcon_update_state(&info->edev,
1 << ARIZONA_CABLE_MICROPHONE,
1 << ARIZONA_CABLE_MICROPHONE);
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, false);
if (ret != 0) {
dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
ret);
}
info->mic = true;
info->detecting = false;
goto handled;
}
/* 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 (info->detecting && (val & 0x3f8)) {
if (info->jack_flips >= info->micd_num_modes * 10) {
dev_dbg(arizona->dev, "Detected HP/line\n");
arizona_identify_headphone(info);
info->detecting = false;
arizona_stop_mic(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++;
}
goto handled;
}
/*
* If we're still detecting and we detect a short then we've
* got a headphone. Otherwise it's a button press.
*/
if (val & 0x3fc) {
if (info->mic) {
dev_dbg(arizona->dev, "Mic button detected\n");
lvl = val & ARIZONA_MICD_LVL_MASK;
lvl >>= ARIZONA_MICD_LVL_SHIFT;
WARN_ON(!lvl);
WARN_ON(ffs(lvl) - 1 >= info->num_micd_ranges);
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 if (info->detecting) {
dev_dbg(arizona->dev, "Headphone detected\n");
info->detecting = false;
arizona_stop_mic(info);
arizona_identify_headphone(info);
} else {
dev_warn(arizona->dev, "Button with no mic: %x\n",
val);
}
} else {
dev_dbg(arizona->dev, "Mic button released\n");
for (i = 0; i < info->num_micd_ranges; i++)
input_report_key(info->input,
info->micd_ranges[i].key, 0);
input_sync(info->input);
arizona_extcon_pulse_micbias(info);
}
handled:
pm_runtime_mark_last_busy(info->dev);
mutex_unlock(&info->lock);
return IRQ_HANDLED;
}
static void arizona_hpdet_work(struct work_struct *work)
{
struct arizona_extcon_info *info = container_of(work,
struct arizona_extcon_info,
hpdet_work.work);
mutex_lock(&info->lock);
arizona_start_hpdet_acc_id(info);
mutex_unlock(&info->lock);
}
static irqreturn_t arizona_jackdet(int irq, void *data)
{
struct arizona_extcon_info *info = data;
struct arizona *arizona = info->arizona;
unsigned int val, present, mask;
int ret, i;
pm_runtime_get_sync(info->dev);
cancel_delayed_work_sync(&info->hpdet_work);
mutex_lock(&info->lock);
if (arizona->pdata.jd_gpio5) {
mask = ARIZONA_MICD_CLAMP_STS;
present = 0;
} else {
mask = ARIZONA_JD1_STS;
present = ARIZONA_JD1_STS;
}
ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
ret);
mutex_unlock(&info->lock);
pm_runtime_put_autosuspend(info->dev);
return IRQ_NONE;
}
if ((val & mask) == present) {
dev_dbg(arizona->dev, "Detected jack\n");
ret = extcon_set_cable_state_(&info->edev,
ARIZONA_CABLE_MECHANICAL, true);
if (ret != 0)
dev_err(arizona->dev, "Mechanical report failed: %d\n",
ret);
if (!arizona->pdata.hpdet_acc_id) {
info->detecting = true;
info->mic = false;
info->jack_flips = 0;
arizona_start_mic(info);
} else {
schedule_delayed_work(&info->hpdet_work,
msecs_to_jiffies(250));
}
regmap_update_bits(arizona->regmap,
ARIZONA_JACK_DETECT_DEBOUNCE,
ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB, 0);
} else {
dev_dbg(arizona->dev, "Detected jack removal\n");
arizona_stop_mic(info);
info->num_hpdet_res = 0;
for (i = 0; i < ARRAY_SIZE(info->hpdet_res); i++)
info->hpdet_res[i] = 0;
info->mic = false;
info->hpdet_done = false;
for (i = 0; i < info->num_micd_ranges; i++)
input_report_key(info->input,
info->micd_ranges[i].key, 0);
input_sync(info->input);
ret = extcon_update_state(&info->edev, 0xffffffff, 0);
if (ret != 0)
dev_err(arizona->dev, "Removal report failed: %d\n",
ret);
regmap_update_bits(arizona->regmap,
ARIZONA_JACK_DETECT_DEBOUNCE,
ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB,
ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB);
}
/* Clear trig_sts to make sure DCVDD is not forced up */
regmap_write(arizona->regmap, ARIZONA_AOD_WKUP_AND_TRIG,
ARIZONA_MICD_CLAMP_FALL_TRIG_STS |
ARIZONA_MICD_CLAMP_RISE_TRIG_STS |
ARIZONA_JD1_FALL_TRIG_STS |
ARIZONA_JD1_RISE_TRIG_STS);
mutex_unlock(&info->lock);
pm_runtime_mark_last_busy(info->dev);
pm_runtime_put_autosuspend(info->dev);
return IRQ_HANDLED;
}
/* Map a level onto a slot in the register bank */
static void arizona_micd_set_level(struct arizona *arizona, int index,
unsigned int level)
{
int reg;
unsigned int mask;
reg = ARIZONA_MIC_DETECT_LEVEL_4 - (index / 2);
if (!(index % 2)) {
mask = 0x3f00;
level <<= 8;
} else {
mask = 0x3f;
}
/* Program the level itself */
regmap_update_bits(arizona->regmap, reg, mask, level);
}
static int arizona_extcon_probe(struct platform_device *pdev)
{
struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
struct arizona_pdata *pdata;
struct arizona_extcon_info *info;
int jack_irq_fall, jack_irq_rise;
int ret, mode, i, j;
if (!arizona->dapm || !arizona->dapm->card)
return -EPROBE_DEFER;
pdata = dev_get_platdata(arizona->dev);
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info) {
dev_err(&pdev->dev, "Failed to allocate memory\n");
ret = -ENOMEM;
goto err;
}
info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
if (IS_ERR(info->micvdd)) {
ret = PTR_ERR(info->micvdd);
dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
goto err;
}
mutex_init(&info->lock);
info->arizona = arizona;
info->dev = &pdev->dev;
INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
platform_set_drvdata(pdev, info);
switch (arizona->type) {
case WM5102:
switch (arizona->rev) {
case 0:
info->micd_reva = true;
break;
default:
info->micd_clamp = true;
info->hpdet_ip = 1;
break;
}
break;
default:
break;
}
info->edev.name = "Headset Jack";
info->edev.supported_cable = arizona_cable;
ret = extcon_dev_register(&info->edev, arizona->dev);
if (ret < 0) {
dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
ret);
goto err;
}
info->input = devm_input_allocate_device(&pdev->dev);
if (!info->input) {
dev_err(arizona->dev, "Can't allocate input dev\n");
ret = -ENOMEM;
goto err_register;
}
info->input->name = "Headset";
info->input->phys = "arizona/extcon";
info->input->dev.parent = &pdev->dev;
if (pdata->num_micd_configs) {
info->micd_modes = pdata->micd_configs;
info->micd_num_modes = pdata->num_micd_configs;
} else {
info->micd_modes = micd_default_modes;
info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
}
if (arizona->pdata.micd_pol_gpio > 0) {
if (info->micd_modes[0].gpio)
mode = GPIOF_OUT_INIT_HIGH;
else
mode = GPIOF_OUT_INIT_LOW;
ret = devm_gpio_request_one(&pdev->dev,
arizona->pdata.micd_pol_gpio,
mode,
"MICD polarity");
if (ret != 0) {
dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
arizona->pdata.micd_pol_gpio, ret);
goto err_register;
}
}
if (arizona->pdata.hpdet_id_gpio > 0) {
ret = devm_gpio_request_one(&pdev->dev,
arizona->pdata.hpdet_id_gpio,
GPIOF_OUT_INIT_LOW,
"HPDET");
if (ret != 0) {
dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
arizona->pdata.hpdet_id_gpio, ret);
goto err_register;
}
}
if (arizona->pdata.micd_bias_start_time)
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_BIAS_STARTTIME_MASK,
arizona->pdata.micd_bias_start_time
<< ARIZONA_MICD_BIAS_STARTTIME_SHIFT);
if (arizona->pdata.micd_rate)
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_RATE_MASK,
arizona->pdata.micd_rate
<< ARIZONA_MICD_RATE_SHIFT);
if (arizona->pdata.micd_dbtime)
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_DBTIME_MASK,
arizona->pdata.micd_dbtime
<< ARIZONA_MICD_DBTIME_SHIFT);
BUILD_BUG_ON(ARRAY_SIZE(arizona_micd_levels) != 0x40);
if (arizona->pdata.num_micd_ranges) {
info->micd_ranges = pdata->micd_ranges;
info->num_micd_ranges = pdata->num_micd_ranges;
} else {
info->micd_ranges = micd_default_ranges;
info->num_micd_ranges = ARRAY_SIZE(micd_default_ranges);
}
if (arizona->pdata.num_micd_ranges > ARIZONA_MAX_MICD_RANGE) {
dev_err(arizona->dev, "Too many MICD ranges: %d\n",
arizona->pdata.num_micd_ranges);
}
if (info->num_micd_ranges > 1) {
for (i = 1; i < info->num_micd_ranges; i++) {
if (info->micd_ranges[i - 1].max >
info->micd_ranges[i].max) {
dev_err(arizona->dev,
"MICD ranges must be sorted\n");
ret = -EINVAL;
goto err_input;
}
}
}
/* Disable all buttons by default */
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2,
ARIZONA_MICD_LVL_SEL_MASK, 0x81);
/* Set up all the buttons the user specified */
for (i = 0; i < info->num_micd_ranges; i++) {
for (j = 0; j < ARRAY_SIZE(arizona_micd_levels); j++)
if (arizona_micd_levels[j] >= info->micd_ranges[i].max)
break;
if (j == ARRAY_SIZE(arizona_micd_levels)) {
dev_err(arizona->dev, "Unsupported MICD level %d\n",
info->micd_ranges[i].max);
ret = -EINVAL;
goto err_input;
}
dev_dbg(arizona->dev, "%d ohms for MICD threshold %d\n",
arizona_micd_levels[j], i);
arizona_micd_set_level(arizona, i, j);
input_set_capability(info->input, EV_KEY,
info->micd_ranges[i].key);
/* Enable reporting of that range */
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_2,
1 << i, 1 << i);
}
/* Set all the remaining keys to a maximum */
for (; i < ARIZONA_MAX_MICD_RANGE; i++)
arizona_micd_set_level(arizona, i, 0x3f);
/*
* If we have a clamp use it, activating in conjunction with
* GPIO5 if that is connected for jack detect operation.
*/
if (info->micd_clamp) {
if (arizona->pdata.jd_gpio5) {
/* Put the GPIO into input mode */
regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL,
0xc101);
regmap_update_bits(arizona->regmap,
ARIZONA_MICD_CLAMP_CONTROL,
ARIZONA_MICD_CLAMP_MODE_MASK, 0x9);
} else {
regmap_update_bits(arizona->regmap,
ARIZONA_MICD_CLAMP_CONTROL,
ARIZONA_MICD_CLAMP_MODE_MASK, 0x4);
}
regmap_update_bits(arizona->regmap,
ARIZONA_JACK_DETECT_DEBOUNCE,
ARIZONA_MICD_CLAMP_DB,
ARIZONA_MICD_CLAMP_DB);
}
arizona_extcon_set_mode(info, 0);
pm_runtime_enable(&pdev->dev);
pm_runtime_idle(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
if (arizona->pdata.jd_gpio5) {
jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
} else {
jack_irq_rise = ARIZONA_IRQ_JD_RISE;
jack_irq_fall = ARIZONA_IRQ_JD_FALL;
}
ret = arizona_request_irq(arizona, jack_irq_rise,
"JACKDET rise", arizona_jackdet, info);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
ret);
goto err_input;
}
ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
ret);
goto err_rise;
}
ret = arizona_request_irq(arizona, jack_irq_fall,
"JACKDET fall", arizona_jackdet, info);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
goto err_rise_wake;
}
ret = arizona_set_irq_wake(arizona, jack_irq_fall, 1);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
ret);
goto err_fall;
}
ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
"MICDET", arizona_micdet, info);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
goto err_fall_wake;
}
ret = arizona_request_irq(arizona, ARIZONA_IRQ_HPDET,
"HPDET", arizona_hpdet_irq, info);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to get HPDET IRQ: %d\n", ret);
goto err_micdet;
}
arizona_clk32k_enable(arizona);
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
ARIZONA_JD1_DB, ARIZONA_JD1_DB);
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
ret = regulator_allow_bypass(info->micvdd, true);
if (ret != 0)
dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n",
ret);
pm_runtime_put(&pdev->dev);
ret = input_register_device(info->input);
if (ret) {
dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
goto err_hpdet;
}
return 0;
err_hpdet:
arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
err_micdet:
arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
err_fall_wake:
arizona_set_irq_wake(arizona, jack_irq_fall, 0);
err_fall:
arizona_free_irq(arizona, jack_irq_fall, info);
err_rise_wake:
arizona_set_irq_wake(arizona, jack_irq_rise, 0);
err_rise:
arizona_free_irq(arizona, jack_irq_rise, info);
err_input:
err_register:
pm_runtime_disable(&pdev->dev);
extcon_dev_unregister(&info->edev);
err:
return ret;
}
static int arizona_extcon_remove(struct platform_device *pdev)
{
struct arizona_extcon_info *info = platform_get_drvdata(pdev);
struct arizona *arizona = info->arizona;
int jack_irq_rise, jack_irq_fall;
pm_runtime_disable(&pdev->dev);
regmap_update_bits(arizona->regmap,
ARIZONA_MICD_CLAMP_CONTROL,
ARIZONA_MICD_CLAMP_MODE_MASK, 0);
if (arizona->pdata.jd_gpio5) {
jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
} else {
jack_irq_rise = ARIZONA_IRQ_JD_RISE;
jack_irq_fall = ARIZONA_IRQ_JD_FALL;
}
arizona_set_irq_wake(arizona, jack_irq_rise, 0);
arizona_set_irq_wake(arizona, jack_irq_fall, 0);
arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
arizona_free_irq(arizona, jack_irq_rise, info);
arizona_free_irq(arizona, jack_irq_fall, info);
cancel_delayed_work_sync(&info->hpdet_work);
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
ARIZONA_JD1_ENA, 0);
arizona_clk32k_disable(arizona);
extcon_dev_unregister(&info->edev);
return 0;
}
static struct platform_driver arizona_extcon_driver = {
.driver = {
.name = "arizona-extcon",
.owner = THIS_MODULE,
},
.probe = arizona_extcon_probe,
.remove = arizona_extcon_remove,
};
module_platform_driver(arizona_extcon_driver);
MODULE_DESCRIPTION("Arizona Extcon driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:extcon-arizona");
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