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authorChanwoo Choi <cw00.choi@samsung.com>2014-05-28 10:35:29 +0400
committerChanwoo Choi <cw00.choi@samsung.com>2014-07-23 05:22:35 +0400
commita75fed2ee6c187ab32b1cb01882c1032c4c9e4a8 (patch)
tree706b108a592f8d109329e44a22fe54cfed1ce9c8 /drivers/extcon
parente1954452f500cb21c09ea401f6f431ab55b35ba3 (diff)
downloadlinux-a75fed2ee6c187ab32b1cb01882c1032c4c9e4a8.tar.xz
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: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/extcon-sm5502.c78
1 files changed, 73 insertions, 5 deletions
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
index a32d40f97ff0..560d7dccec7b 100644
--- a/drivers/extcon/extcon-sm5502.c
+++ b/drivers/extcon/extcon-sm5502.c
@@ -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;
@@ -343,15 +401,19 @@ static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
switch (cable_type) {
case SM5502_MUIC_ADC_OPEN_USB:
- idx = EXTCON_CABLE_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;
+ 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:
+ idx = EXTCON_CABLE_USB_HOST;
+ 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;