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extcon: arizona: Factor out microphone and button detection

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Continue refactoring the microphone detect handling by factoring
out the handling for microphone detection and button detection
into separate functions. This both makes the code a little clearer
and prepares for some planned future refactoring to make the state
handling in the driver more explicit.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Charles Keepax 2019-12-09 11:09:16 +00:00 committed by Chanwoo Choi
parent 7e14fc437c
commit 4b28b25c30
1 changed files with 71 additions and 44 deletions
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115
drivers/extcon/extcon-arizona.c
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@ -872,38 +872,18 @@ static int arizona_micd_read(struct arizona_extcon_info *info)
return val;
}
static void arizona_micd_detect(struct work_struct *work)
static int arizona_micdet_reading(void *priv)
{
struct arizona_extcon_info *info = container_of(work,
struct arizona_extcon_info,
micd_detect_work.work);
struct arizona_extcon_info *info = priv;
struct arizona *arizona = info->arizona;
unsigned int val = 0, lvl;
int ret, i, key;
cancel_delayed_work_sync(&info->micd_timeout_work);
mutex_lock(&info->lock);
/* 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);
mutex_unlock(&info->lock);
return;
} else if (!ret) {
dev_dbg(arizona->dev, "Ignoring MICDET for removed cable\n");
mutex_unlock(&info->lock);
return;
}
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)
goto handled;
return ret;
val = ret;
@ -913,11 +893,11 @@ static void arizona_micd_detect(struct work_struct *work)
info->mic = false;
info->detecting = false;
arizona_identify_headphone(info);
goto handled;
return 0;
}
/* If we got a high impedence we should have a headset, report it. */
if (info->detecting && (val & ARIZONA_MICD_LVL_8)) {
if (val & ARIZONA_MICD_LVL_8) {
info->mic = true;
info->detecting = false;
@ -936,7 +916,7 @@ static void arizona_micd_detect(struct work_struct *work)
ret);
}
goto handled;
return 0;
}
/* If we detected a lower impedence during initial startup
@ -945,7 +925,7 @@ static void arizona_micd_detect(struct work_struct *work)
* plain headphones. If both polarities report a low
* impedence then give up and report headphones.
*/
if (info->detecting && (val & MICD_LVL_1_TO_7)) {
if (val & MICD_LVL_1_TO_7) {
if (info->jack_flips >= info->micd_num_modes * 10) {
dev_dbg(arizona->dev, "Detected HP/line\n");
@ -959,11 +939,43 @@ static void arizona_micd_detect(struct work_struct *work)
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));
}
goto handled;
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.
@ -986,11 +998,6 @@ static void arizona_micd_detect(struct work_struct *work)
} else {
dev_err(arizona->dev, "Button out of range\n");
}
} else if (info->detecting) {
dev_dbg(arizona->dev, "Headphone detected\n");
info->detecting = false;
arizona_identify_headphone(info);
} else {
dev_warn(arizona->dev, "Button with no mic: %x\n",
val);
@ -1004,19 +1011,39 @@ static void arizona_micd_detect(struct work_struct *work)
arizona_extcon_pulse_micbias(info);
}
handled:
if (info->detecting) {
if (arizona->pdata.micd_software_compare)
regmap_update_bits(arizona->regmap,
ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA,
ARIZONA_MICD_ENA);
return 0;
}
queue_delayed_work(system_power_efficient_wq,
&info->micd_timeout_work,
msecs_to_jiffies(arizona->pdata.micd_timeout));
static void arizona_micd_detect(struct work_struct *work)
{
struct arizona_extcon_info *info = container_of(work,
struct arizona_extcon_info,
micd_detect_work.work);
struct arizona *arizona = info->arizona;
int ret;
cancel_delayed_work_sync(&info->micd_timeout_work);
mutex_lock(&info->lock);
/* 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);
mutex_unlock(&info->lock);
return;
} else if (!ret) {
dev_dbg(arizona->dev, "Ignoring MICDET for removed cable\n");
mutex_unlock(&info->lock);
return;
}
if (info->detecting)
arizona_micdet_reading(info);
else
arizona_button_reading(info);
pm_runtime_mark_last_busy(info->dev);
mutex_unlock(&info->lock);
}