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Commit a1626298 authored by Chanwoo Choi's avatar Chanwoo Choi
Browse files

extcon: max77693: Add support Dock-Smart device for desktop mode 



This patch support the detection of Dock-Smart device which include
three type of port(HDMI, USB for mouse/keyboard and Micro-USB for
USB/TA cable).The Dock-Smart device need always exteranl power supply
(USB/TA cable through micro-usb cable). Dock-Smart device support screen
output of target to separate monitor and mouse/keyboard for desktop
mode.

Features of 'Dock-Smart device'
- Support HDMI
- Support external output feature of audio
- Support charging through micro-usb port without data
  connection if TA cable is connected to target.
- Support charging and data connection through micro-usb port
  if USB cable is connected between target and host device.
- Support OTG device (Mouse/Keyboard)

Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarMyungjoo Ham <myungjoo.ham@samsung.com>
parent 0e2738f5

drivers/extcon/extcon-max77693.c

+138 −62
Original line number Diff line number Diff line
@@ -442,6 +442,8 @@ static int max77693_muic_dock_handler(struct max77693_muic_info *info, 
		int cable_type, bool attached)

{

	int ret = 0;

	int vbvolt;

	bool cable_attached;

	char dock_name[CABLE_NAME_MAX];



	dev_info(info->dev,
@@ -450,14 +452,45 @@ static int max77693_muic_dock_handler(struct max77693_muic_info *info, 


	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);

		/*

		 * Check power cable whether attached or detached state.

		 * The Dock-Smart device need surely external power supply.

		 * If power cable(USB/TA) isn't connected to Dock device,

		 * user can't use Dock-Smart for desktop mode.

		 */

		vbvolt = max77693_muic_get_cable_type(info,

				MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);

		if (attached && !vbvolt) {

			dev_warn(info->dev,

				"Cannot detect external power supply\n");

			return 0;

		}



		/*

		 * Notify Dock-Smart/MHL state.

		 * - Dock-Smart device include three type of cable which

		 * are HDMI, USB for mouse/keyboard and micro-usb port

		 * for USB/TA cable. Dock-Smart device need always exteranl

		 * power supply(USB/TA cable through micro-usb cable). Dock-

		 * Smart device support screen output of target to separate

		 * monitor and mouse/keyboard for desktop mode.

		 *

		 * Features of 'USB/TA cable with Dock-Smart device'

		 * - Support MHL

		 * - Support external output feature of audio

		 * - Support charging through micro-usb port without data

		 *	     connection if TA cable is connected to target.

		 * - Support charging and data connection through micro-usb port

		 *           if USB cable is connected between target and host

		 *	     device.

		 * - Support OTG device (Mouse/Keyboard)

		 */

		ret = max77693_muic_set_path(info, info->path_usb, attached);

		if (ret < 0)

			goto out;

			return ret;



		/* Dock-Smart */

		extcon_set_cable_state(info->edev, "Dock-Smart", attached);

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

		goto out;

	case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:	/* Dock-Car */

		strcpy(dock_name, "Dock-Car");
@@ -475,11 +508,11 @@ static int max77693_muic_dock_handler(struct max77693_muic_info *info, 
	/* Dock-Car/Desk/Audio, PATH:AUDIO */

	ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);

	if (ret < 0)

		goto out;

		return ret;

	extcon_set_cable_state(info->edev, dock_name, attached);



out:

	return ret;

	return 0;

}



static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
@@ -737,48 +770,90 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info) 


	switch (chg_type) {

	case MAX77693_CHARGER_TYPE_USB:

	case MAX77693_CHARGER_TYPE_DEDICATED_CHG:

	case MAX77693_CHARGER_TYPE_NONE:

		/* Check MAX77693_CABLE_GROUP_ADC_GND type */

		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:

			/*

		 * 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

			 * MHL cable with MHL_TA(USB/TA) 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.

			 *

			 * Features of 'MHL_TA(USB/TA) with MHL cable'

			 * - Support MHL

			 * - Support charging through micro-usb port without data connection

			 */

		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;

				extcon_set_cable_state(info->edev, "MHL", cable_attached);

			break;

		}



		/* Check MAX77693_CABLE_GROUP_ADC type */

		cable_type = max77693_muic_get_cable_type(info,

					MAX77693_CABLE_GROUP_ADC,

					&cable_attached);

		switch (cable_type) {

		case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:		/* Dock-Audio */

			/*

		 * USB/TA cable with Dock-Audio device

			 * Dock-Audio device with USB/TA cable

			 * - 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.

			 * driver check whether USB/TA cable is connected. If USB/TA

			 * cable is connected, extcon driver notify state to notifiee

			 * for charging battery.

			 *

			 * Features of 'USB/TA cable with Dock-Audio device'

			 * - Support external output feature of audio.

			 * - Support charging through micro-usb port without data

			 *           connection.

			 */

		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;

				extcon_set_cable_state(info->edev, "Dock-Audio", cable_attached);

			break;

		case MAX77693_MUIC_ADC_RESERVED_ACC_3:		/* Dock-Smart */

			/*

			 * Dock-Smart device with USB/TA cable

			 * - Dock-Desk device include three type of cable which

			 * are HDMI, USB for mouse/keyboard and micro-usb port

			 * for USB/TA cable. Dock-Smart device need always exteranl

			 * power supply(USB/TA cable through micro-usb cable). Dock-

			 * Smart device support screen output of target to separate

			 * monitor and mouse/keyboard for desktop mode.

			 *

			 * Features of 'USB/TA cable with Dock-Smart device'

			 * - Support MHL

			 * - Support external output feature of audio

			 * - Support charging through micro-usb port without data

			 *	     connection if TA cable is connected to target.

			 * - Support charging and data connection through micro-usb port

			 *           if USB cable is connected between target and host

			 *	     device.

			 * - Support OTG device (Mouse/Keyboard)

			 */

			ret = max77693_muic_set_path(info, info->path_usb, attached);

			if (ret < 0)

				return ret;



			extcon_set_cable_state(info->edev, "Dock-Smart", attached);

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



			break;

		}



		/* Check MAX77693_CABLE_GROUP_CHG type */

		switch (chg_type) {

		case MAX77693_CHARGER_TYPE_NONE:

			/*

			 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA cable

			 * is attached, muic device happen below two interrupt.
@@ -795,22 +870,25 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info) 
			 * be face with unusual action. So, driver should check this

			 * situation in spite of, that previous charger type is N/A.

			 */

		if (chg_type == MAX77693_CHARGER_TYPE_NONE)

			break;



		case MAX77693_CHARGER_TYPE_USB:

			/* Only USB cable, PATH:AP_USB */

		ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);

			ret = max77693_muic_set_path(info, info->path_usb, attached);

			if (ret < 0)

			goto out;

				return ret;



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

			break;

		case MAX77693_CHARGER_TYPE_DEDICATED_CHG:

			/* Only TA cable */

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

			break;

		}

		break;

	case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:

		extcon_set_cable_state(info->edev,

				"Charge-downstream", attached);

		break;

	case MAX77693_CHARGER_TYPE_DEDICATED_CHG:

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

		break;

	case MAX77693_CHARGER_TYPE_APPLE_500MA:

		extcon_set_cable_state(info->edev, "Slow-charger", attached);

		break;
@@ -823,12 +901,10 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info) 
		dev_err(info->dev,

			"failed to detect %s accessory (chg_type:0x%x)\n",

			attached ? "attached" : "detached", chg_type);

		ret = -EINVAL;

		goto out;

		return -EINVAL;

	}



out:

	return ret;

	return 0;

}



static void max77693_muic_irq_work(struct work_struct *work)