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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
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+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;