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Commit 39bf369e authored by Chanwoo Choi's avatar Chanwoo Choi
Browse files

extcon: max77693: Add support dock device and buttons 



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

Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarMyungjoo Ham <myungjoo.ham@samsung.com>
parent d0587eb7

drivers/extcon/extcon-max77693.c

+216 −39
Original line number Diff line number Diff line
@@ -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>
@@ -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 {
@@ -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,

};
@@ -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,

};
@@ -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;
@@ -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;
@@ -519,31 +621,58 @@ 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:
@@ -551,11 +680,12 @@ static int max77693_muic_adc_handler(struct max77693_muic_info *info) 
	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);
@@ -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;
@@ -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);

		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);

			goto out;

		}



		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.

		 * 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.

		 */

			extcon_set_cable_state(info->edev, "MHL_TA", attached);

		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,

						"MHL", false);

			break;

		default:

						"Dock-Audio", false);

			goto out;

		}



		/* Only USB cable, PATH:AP_USB */

			ret = max77693_muic_set_path(info, CONTROL1_SW_USB,

						attached);

		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,
@@ -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);
@@ -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);
@@ -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);
@@ -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;