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Date: Wed, 28 May 2014 18:39:35 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: linux-kernel@...r.kernel.org
Cc: myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCH 3/4] 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@...sung.com>
---
drivers/extcon/extcon-sm5502.c | 78 +++++++++++++++++++++++++++++++++++++++---
include/linux/extcon/sm5502.h | 23 +++++++++++++
2 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
index 3588df0..e9f9311 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;
diff --git a/include/linux/extcon/sm5502.h b/include/linux/extcon/sm5502.h
index 17bd655..030526b 100644
--- a/include/linux/extcon/sm5502.h
+++ b/include/linux/extcon/sm5502.h
@@ -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 */
--
1.8.0
--
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