From 8cd61d5d11ccbe0038523b60006dc5f41893f68c Mon Sep 17 00:00:00 2001
From: Ankit Sharma <ansharma@codeaurora.org>
Date: Mon, 14 Aug 2017 17:08:23 +0530
Subject: [PATCH] power: smb-lib: Add USB notification

In designs without the pd-phy interface the usb
insertion/removal and CC_orientation needs to be
notified to the usb stack by the charger driver.
Add this notification support via the extcon interface.

CRs-Fixed: 2086422
Change-Id: I22eae3f818859c8fbd08066f690517d4210c7dd3
Signed-off-by: Ankit Sharma <ansharma@codeaurora.org>
---
 drivers/power/supply/qcom/smb-lib.c | 40 +++++++++++++++++++++++++++++
 drivers/power/supply/qcom/smb-lib.h |  7 +++++
 2 files changed, 47 insertions(+)

diff --git a/drivers/power/supply/qcom/smb-lib.c b/drivers/power/supply/qcom/smb-lib.c
index 0ed07aa13855..58a317e62bbd 100644
--- a/drivers/power/supply/qcom/smb-lib.c
+++ b/drivers/power/supply/qcom/smb-lib.c
@@ -3566,6 +3566,32 @@ static void smblib_force_legacy_icl(struct smb_charger *chg, int pst)
 	}
 }
 
+static void smblib_notify_extcon_props(struct smb_charger *chg)
+{
+	union power_supply_propval val;
+
+	smblib_get_prop_typec_cc_orientation(chg, &val);
+	extcon_set_cable_state_(chg->extcon, EXTCON_USB_CC,
+					(val.intval == 2) ? 1 : 0);
+	extcon_set_cable_state_(chg->extcon, EXTCON_USB_SPEED, true);
+}
+
+static void smblib_notify_device_mode(struct smb_charger *chg, bool enable)
+{
+	if (enable)
+		smblib_notify_extcon_props(chg);
+
+	extcon_set_cable_state_(chg->extcon, EXTCON_USB, enable);
+}
+
+static void smblib_notify_usb_host(struct smb_charger *chg, bool enable)
+{
+	if (enable)
+		smblib_notify_extcon_props(chg);
+
+	extcon_set_cable_state_(chg->extcon, EXTCON_USB_HOST, enable);
+}
+
 #define HVDCP_DET_MS 2500
 static void smblib_handle_apsd_done(struct smb_charger *chg, bool rising)
 {
@@ -3585,6 +3611,8 @@ static void smblib_handle_apsd_done(struct smb_charger *chg, bool rising)
 		if (chg->micro_usb_mode)
 			extcon_set_cable_state_(chg->extcon, EXTCON_USB,
 					true);
+		if (chg->use_extcon)
+			smblib_notify_device_mode(chg, true);
 	case OCP_CHARGER_BIT:
 	case FLOAT_CHARGER_BIT:
 		/* if not DCP then no hvdcp timeout happens, Enable pd here. */
@@ -3669,6 +3697,10 @@ static void typec_sink_insertion(struct smb_charger *chg)
 	 */
 	vote(chg->pd_disallowed_votable_indirect, HVDCP_TIMEOUT_VOTER,
 			false, 0);
+	if (chg->use_extcon) {
+		smblib_notify_usb_host(chg, true);
+		chg->otg_present = true;
+	}
 }
 
 static void typec_sink_removal(struct smb_charger *chg)
@@ -3817,6 +3849,14 @@ unlock:
 
 	typec_sink_removal(chg);
 	smblib_update_usb_type(chg);
+
+	if (chg->use_extcon) {
+		if (chg->otg_present)
+			smblib_notify_usb_host(chg, false);
+		else
+			smblib_notify_device_mode(chg, false);
+	}
+	chg->otg_present = false;
 }
 
 static void smblib_handle_typec_insertion(struct smb_charger *chg)
diff --git a/drivers/power/supply/qcom/smb-lib.h b/drivers/power/supply/qcom/smb-lib.h
index 8c810352f78f..89ad7e7b5580 100644
--- a/drivers/power/supply/qcom/smb-lib.h
+++ b/drivers/power/supply/qcom/smb-lib.h
@@ -139,9 +139,14 @@ struct smb_irq_info {
 static const unsigned int smblib_extcon_cable[] = {
 	EXTCON_USB,
 	EXTCON_USB_HOST,
+	EXTCON_USB_CC,
+	EXTCON_USB_SPEED,
 	EXTCON_NONE,
 };
 
+/* EXTCON_USB and EXTCON_USB_HOST are mutually exclusive */
+static const u32 smblib_extcon_exclusive[] = {0x3, 0};
+
 struct smb_regulator {
 	struct regulator_dev	*rdev;
 	struct regulator_desc	rdesc;
@@ -327,6 +332,8 @@ struct smb_charger {
 	int			usb_icl_change_irq_enabled;
 	u32			jeita_status;
 	u8			float_cfg;
+	bool			use_extcon;
+	bool			otg_present;
 
 	/* workaround flag */
 	u32			wa_flags;