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Commit a75fed2e authored by Chanwoo Choi's avatar Chanwoo Choi
Browse files

extcon: sm5502: Change internal hardware switch according to cable type 



This patch changes internal hardware DP_CON/DM_CON switch according to
cable type. The SM5502 MUIC device can set hardware switch as following:
- OPEN (not connected state) / USB / UART / AUDIO
Also, this patch set VBUSIN switch according to cable type.

Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
parent e1954452

drivers/extcon/extcon-sm5502.c

+73 −5
Original line number Diff line number Diff line
@@ -228,6 +228,61 @@ static const struct regmap_config sm5502_muic_regmap_config = { 
	.max_register	= SM5502_REG_END,

};



/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */

static int sm5502_muic_set_path(struct sm5502_muic_info *info,

				unsigned int con_sw, unsigned int vbus_sw,

				bool attached)

{

	int ret;



	if (!attached) {

		con_sw	= DM_DP_SWITCH_OPEN;

		vbus_sw	= VBUSIN_SWITCH_OPEN;

	}



	switch (con_sw) {

	case DM_DP_SWITCH_OPEN:

	case DM_DP_SWITCH_USB:

	case DM_DP_SWITCH_AUDIO:

	case DM_DP_SWITCH_UART:

		ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,

					 SM5502_REG_MANUAL_SW1_DP_MASK |

					 SM5502_REG_MANUAL_SW1_DM_MASK,

					 con_sw);

		if (ret < 0) {

			dev_err(info->dev,

				"cannot update DM_CON/DP_CON switch\n");

			return ret;

		}

		break;

	default:

		dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",

				con_sw);

		return -EINVAL;

	};



	switch (vbus_sw) {

	case VBUSIN_SWITCH_OPEN:

	case VBUSIN_SWITCH_VBUSOUT:

	case VBUSIN_SWITCH_MIC:

	case VBUSIN_SWITCH_VBUSOUT_WITH_USB:

		ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,

					 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,

					 vbus_sw);

		if (ret < 0) {

			dev_err(info->dev,

				"cannot update VBUSIN switch\n");

			return ret;

		}

		break;

	default:

		dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);

		return -EINVAL;

	};



	return 0;

}



/* Return cable type of attached or detached accessories */

static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)

{
@@ -329,7 +384,10 @@ static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, 
	static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;

	const char **cable_names = info->edev->supported_cable;

	unsigned int cable_type = SM5502_MUIC_ADC_GROUND;

	unsigned int con_sw = DM_DP_SWITCH_OPEN;

	unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;

	unsigned int idx = 0;

	int ret;



	if (!cable_names)

		return 0;
@@ -344,14 +402,18 @@ static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, 
	switch (cable_type) {

	case SM5502_MUIC_ADC_OPEN_USB:

		idx	= EXTCON_CABLE_USB;

		con_sw	= DM_DP_SWITCH_USB;

		vbus_sw	= VBUSIN_SWITCH_VBUSOUT_WITH_USB;

		break;

	case SM5502_MUIC_ADC_OPEN_TA:

		idx	= EXTCON_CABLE_TA;

		con_sw	= DM_DP_SWITCH_OPEN;

		vbus_sw	= VBUSIN_SWITCH_VBUSOUT;

		break;

	case SM5502_MUIC_ADC_OPEN_USB_OTG:

		idx	= EXTCON_CABLE_USB_HOST;

		break;

	case SM5502_MUIC_ADC_GROUND:

		con_sw	= DM_DP_SWITCH_USB;

		vbus_sw	= VBUSIN_SWITCH_OPEN;

		break;

	default:

		dev_dbg(info->dev,
@@ -359,6 +421,12 @@ static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, 
		return 0;

	};



	/* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */

	ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);

	if (ret < 0)

		return ret;



	/* Change the state of external accessory */

	extcon_set_cable_state(info->edev, cable_names[idx], attached);



	return 0;

include/linux/extcon/sm5502.h

+23 −0
Original line number Diff line number Diff line
@@ -223,6 +223,29 @@ enum sm5502_reg { 
#define SM5502_REG_DEV_TYPE2_TTY_MASK			(0x1 << SM5502_REG_DEV_TYPE2_TTY_SHIFT)

#define SM5502_REG_DEV_TYPE2_AV_CABLE_MASK		(0x1 << SM5502_REG_DEV_TYPE2_AV_CABLE_SHIFT)



#define SM5502_REG_MANUAL_SW1_VBUSIN_SHIFT	0

#define SM5502_REG_MANUAL_SW1_DP_SHIFT		2

#define SM5502_REG_MANUAL_SW1_DM_SHIFT		5

#define SM5502_REG_MANUAL_SW1_VBUSIN_MASK	(0x3 << SM5502_REG_MANUAL_SW1_VBUSIN_SHIFT)

#define SM5502_REG_MANUAL_SW1_DP_MASK		(0x7 << SM5502_REG_MANUAL_SW1_DP_SHIFT)

#define SM5502_REG_MANUAL_SW1_DM_MASK		(0x7 << SM5502_REG_MANUAL_SW1_DM_SHIFT)

#define VBUSIN_SWITCH_OPEN			0x0

#define VBUSIN_SWITCH_VBUSOUT			0x1

#define VBUSIN_SWITCH_MIC			0x2

#define VBUSIN_SWITCH_VBUSOUT_WITH_USB		0x3

#define DM_DP_CON_SWITCH_OPEN			0x0

#define DM_DP_CON_SWITCH_USB			0x1

#define DM_DP_CON_SWITCH_AUDIO			0x2

#define DM_DP_CON_SWITCH_UART			0x3

#define DM_DP_SWITCH_OPEN			((DM_DP_CON_SWITCH_OPEN <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \

						| (DM_DP_CON_SWITCH_OPEN <<SM5502_REG_MANUAL_SW1_DM_SHIFT))

#define DM_DP_SWITCH_USB			((DM_DP_CON_SWITCH_USB <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \

						| (DM_DP_CON_SWITCH_USB <<SM5502_REG_MANUAL_SW1_DM_SHIFT))

#define DM_DP_SWITCH_AUDIO			((DM_DP_CON_SWITCH_AUDIO <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \

						| (DM_DP_CON_SWITCH_AUDIO <<SM5502_REG_MANUAL_SW1_DM_SHIFT))

#define DM_DP_SWITCH_UART			((DM_DP_CON_SWITCH_UART <<SM5502_REG_MANUAL_SW1_DP_SHIFT) \

						| (DM_DP_CON_SWITCH_UART <<SM5502_REG_MANUAL_SW1_DM_SHIFT))



/* SM5502 Interrupts */

enum sm5502_irq {

	/* INT1 */