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extcon: max77693: Add support dock device and buttons
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This patch support detection of dock device with extcon and
buttons of dock device for playing music with input subsystem.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
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Chanwoo Choi committed Jan 15, 2013
1 parent d0587eb commit 39bf369
Showing 1 changed file with 216 additions and 39 deletions.
255 changes: 216 additions & 39 deletions drivers/extcon/extcon-max77693.c
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/platform_device.h>
Expand All @@ -44,11 +45,15 @@ struct max77693_muic_info {
int prev_cable_type;
int prev_cable_type_gnd;
int prev_chg_type;
int prev_button_type;
u8 status[2];

int irq;
struct work_struct irq_work;
struct mutex mutex;

/* Button of dock device */
struct input_dev *dock;
};

enum max77693_muic_cable_group {
Expand Down Expand Up @@ -156,7 +161,10 @@ enum {
EXTCON_CABLE_JIG_USB_ON,
EXTCON_CABLE_JIG_USB_OFF,
EXTCON_CABLE_JIG_UART_OFF,
EXTCON_CABLE_AUDIO_VIDEO_LOAD,
EXTCON_CABLE_JIG_UART_ON,
EXTCON_CABLE_DOCK_SMART,
EXTCON_CABLE_DOCK_DESK,
EXTCON_CABLE_DOCK_AUDIO,

_EXTCON_CABLE_NUM,
};
Expand All @@ -173,7 +181,10 @@ const char *max77693_extcon_cable[] = {
[EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON",
[EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
[EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
[EXTCON_CABLE_AUDIO_VIDEO_LOAD] = "Audio-video-load",
[EXTCON_CABLE_JIG_UART_ON] = "Dock-Car",
[EXTCON_CABLE_DOCK_SMART] = "Dock-Smart",
[EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
[EXTCON_CABLE_DOCK_AUDIO] = "Dock-Audio",

NULL,
};
Expand Down Expand Up @@ -411,6 +422,96 @@ static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
return cable_type;
}

static int max77693_muic_dock_handler(struct max77693_muic_info *info,
int cable_type, bool attached)
{
int ret = 0;
char dock_name[CABLE_NAME_MAX];

dev_info(info->dev,
"external connector is %s (adc:0x%02x)\n",
attached ? "attached" : "detached", cable_type);

switch (cable_type) {
case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
/* PATH:AP_USB */
ret = max77693_muic_set_path(info,
CONTROL1_SW_USB, attached);
if (ret < 0)
goto out;

/* Dock-Smart */
extcon_set_cable_state(info->edev, "Dock-Smart", attached);
goto out;
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */
strcpy(dock_name, "Dock-Car");
break;
case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
strcpy(dock_name, "Dock-Desk");
break;
case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
strcpy(dock_name, "Dock-Audio");
if (!attached)
extcon_set_cable_state(info->edev, "USB", false);
break;
}

/* Dock-Car/Desk/Audio, PATH:AUDIO */
ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev, dock_name, attached);

out:
return ret;
}

static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
int button_type, bool attached)
{
struct input_dev *dock = info->dock;
unsigned int code;
int ret = 0;

switch (button_type) {
case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
/* DOCK_KEY_PREV */
code = KEY_PREVIOUSSONG;
break;
case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
/* DOCK_KEY_NEXT */
code = KEY_NEXTSONG;
break;
case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
/* DOCK_VOL_DOWN */
code = KEY_VOLUMEDOWN;
break;
case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
/* DOCK_VOL_UP */
code = KEY_VOLUMEUP;
break;
case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
/* DOCK_KEY_PLAY_PAUSE */
code = KEY_PLAYPAUSE;
break;
default:
dev_err(info->dev,
"failed to detect %s key (adc:0x%x)\n",
attached ? "pressed" : "released", button_type);
ret = -EINVAL;
goto out;
}

input_event(dock, EV_KEY, code, attached);
input_sync(dock);

out:
return 0;
}

static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
{
int cable_type_gnd;
Expand Down Expand Up @@ -494,6 +595,7 @@ static int max77693_muic_jig_handler(struct max77693_muic_info *info,
static int max77693_muic_adc_handler(struct max77693_muic_info *info)
{
int cable_type;
int button_type;
bool attached;
int ret = 0;

Expand All @@ -519,43 +621,71 @@ static int max77693_muic_adc_handler(struct max77693_muic_info *info)
if (ret < 0)
goto out;
break;
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
/* Audio Video cable with no-load */
ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */
case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
/*
* DOCK device
*
* The MAX77693 MUIC device can detect total 34 cable type
* except of charger cable and MUIC device didn't define
* specfic role of cable in the range of from 0x01 to 0x12
* of ADC value. So, can use/define cable with no role according
* to schema of hardware board.
*/
ret = max77693_muic_dock_handler(info, cable_type, attached);
if (ret < 0)
goto out;
break;
case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
/*
* Button of DOCK device
* - the Prev/Next/Volume Up/Volume Down/Play-Pause button
*
* The MAX77693 MUIC device can detect total 34 cable type
* except of charger cable and MUIC device didn't define
* specfic role of cable in the range of from 0x01 to 0x12
* of ADC value. So, can use/define cable with no role according
* to schema of hardware board.
*/
if (attached)
button_type = info->prev_button_type = cable_type;
else
button_type = info->prev_button_type;

ret = max77693_muic_dock_button_handler(info, button_type,
attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev,
"Audio-video-noload", attached);
break;
case MAX77693_MUIC_ADC_SEND_END_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
case MAX77693_MUIC_ADC_RESERVED_ACC_1:
case MAX77693_MUIC_ADC_RESERVED_ACC_2:
case MAX77693_MUIC_ADC_RESERVED_ACC_3:
case MAX77693_MUIC_ADC_RESERVED_ACC_4:
case MAX77693_MUIC_ADC_RESERVED_ACC_5:
case MAX77693_MUIC_ADC_CEA936_AUDIO:
case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
case MAX77693_MUIC_ADC_TTY_CONVERTER:
case MAX77693_MUIC_ADC_UART_CABLE:
case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
/* This accessory isn't used in general case if it is specially
needed to detect additional accessory, should implement
proper operation when this accessory is attached/detached. */
/*
* This accessory isn't used in general case if it is specially
* needed to detect additional accessory, should implement
* proper operation when this accessory is attached/detached.
*/
dev_info(info->dev,
"accessory is %s but it isn't used (adc:0x%x)\n",
attached ? "attached" : "detached", cable_type);
Expand All @@ -576,6 +706,7 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info)
{
int chg_type;
int cable_type_gnd;
int cable_type;
bool attached;
bool cable_attached;
int ret = 0;
Expand All @@ -590,35 +721,52 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info)

switch (chg_type) {
case MAX77693_CHARGER_TYPE_USB:
/*
* MHL_TA(USB/TA) with MHL cable
* - MHL cable include two port(HDMI line and separate micro
* -usb port. When the target connect MHL cable, extcon driver
* check whether MHL_TA(USB/TA) cable is connected. If MHL_TA
* cable is connected, extcon driver notify state to notifiee
* for charging battery.
*/
cable_type_gnd = max77693_muic_get_cable_type(info,
MAX77693_CABLE_GROUP_ADC_GND,
&cable_attached);

switch (cable_type_gnd) {
case MAX77693_MUIC_GND_MHL:
case MAX77693_MUIC_GND_MHL_VB:
/*
* USB/TA with MHL cable
* - MHL cable, which connect micro USB or TA cable,
* is used to charging battery. So, extcon driver check
* charging type whether micro USB or TA cable is
* connected to MHL cable when extcon driver detect MHL
* cable.
*/
if (cable_type_gnd == MAX77693_MUIC_GND_MHL
|| cable_type_gnd == MAX77693_MUIC_GND_MHL_VB) {
extcon_set_cable_state(info->edev, "MHL_TA", attached);

if (!cable_attached)
extcon_set_cable_state(info->edev,
"MHL", false);
break;
default:
/* Only USB cable, PATH:AP_USB */
ret = max77693_muic_set_path(info, CONTROL1_SW_USB,
attached);
if (ret < 0)
goto out;
"MHL", false);
goto out;
}

/*
* USB/TA cable with Dock-Audio device
* - Dock device include two port(Dock-Audio and micro-usb
* port). When the target connect Dock-Audio device, extcon
* driver check whether USB/TA cable is connected.
* If USB/TA cable is connected, extcon driver notify state
* to notifiee for charging battery.
*/
cable_type = max77693_muic_get_cable_type(info,
MAX77693_CABLE_GROUP_ADC,
&cable_attached);
if (cable_type == MAX77693_MUIC_ADC_AV_CABLE_NOLOAD) {
extcon_set_cable_state(info->edev, "USB", attached);

if (!cable_attached)
extcon_set_cable_state(info->edev,
"Dock-Audio", false);
goto out;
}

/* Only USB cable, PATH:AP_USB */
ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev, "USB", attached);
break;
case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
extcon_set_cable_state(info->edev,
Expand Down Expand Up @@ -794,6 +942,32 @@ static int max77693_muic_probe(struct platform_device *pdev)
return ret;
}
}

/* Register input device for button of dock device */
info->dock = input_allocate_device();
if (!info->dock) {
dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
return -ENOMEM;
}
info->dock->name = "max77693-muic/dock";
info->dock->phys = "max77693-muic/extcon";
info->dock->dev.parent = &pdev->dev;

__set_bit(EV_REP, info->dock->evbit);

input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);

ret = input_register_device(info->dock);
if (ret < 0) {
dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
ret);
return ret;
}

platform_set_drvdata(pdev, info);
mutex_init(&info->mutex);

Expand Down Expand Up @@ -870,7 +1044,7 @@ static int max77693_muic_probe(struct platform_device *pdev)
MAX77693_MUIC_REG_ID, &id);
if (ret < 0) {
dev_err(&pdev->dev, "failed to read revision number\n");
goto err_irq;
goto err_extcon;
}
dev_info(info->dev, "device ID : 0x%x\n", id);

Expand All @@ -882,6 +1056,8 @@ static int max77693_muic_probe(struct platform_device *pdev)

return ret;

err_extcon:
extcon_dev_unregister(info->edev);
err_irq:
while (--i >= 0)
free_irq(muic_irqs[i].virq, info);
Expand All @@ -896,6 +1072,7 @@ static int max77693_muic_remove(struct platform_device *pdev)
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
free_irq(muic_irqs[i].virq, info);
cancel_work_sync(&info->irq_work);
input_unregister_device(info->dock);
extcon_dev_unregister(info->edev);

return 0;
Expand Down

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