eve: Add support for anx3429 tcpc low power mode

Added interrupt handler for CABLE_DET signal on both port 0/1. This
allows us to define CONFIG_USB_PD_TCPC_LOW_POWER.

BUG=chrome-os-partner:63067
BRANCH=none
TEST=Connected USB mouse, keyboard and USB stick to both ports and
verified the devices were recognized and attached properly. Verified
that ports 0/1 always worked with blackcat typeC charger.

Change-Id: I4d8a8bdba4f95e73333e2e01f11fe1d48453a2fe
Signed-off-by: Scott <scollyer@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/444315
Commit-Ready: Scott Collyer <scollyer@chromium.org>
Tested-by: Scott Collyer <scollyer@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@google.com>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

3 files changed, 64 insertions, 2 deletions

diff --git a/board/eve/board.c b/board/eve/board.c
index 50190f0fba..5a11f21241 100644
--- a/board/eve/board.c
+++ b/board/eve/board.c
@@ -85,6 +85,61 @@ void tablet_mode_interrupt(enum gpio_signal signal)
 	hook_call_deferred(&enable_input_devices_data, LID_DEBOUNCE_US);
 }
 
+#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
+static void anx74xx_c0_cable_det_handler(void)
+{
+	int level = gpio_get_level(GPIO_USB_C0_CABLE_DET);
+
+	/*
+	 * Setting the low power is handled by DRP status hence
+	 * handle only the attach event.
+	 */
+	if (level)
+		anx74xx_handle_power_mode(I2C_PORT_TCPC0,
+					ANX74XX_NORMAL_MODE);
+
+	/* confirm if cable_det is asserted */
+	if (!level || gpio_get_level(GPIO_USB_C0_PD_RST_L))
+		return;
+
+	task_set_event(TASK_ID_PD_C0, PD_EVENT_TCPC_RESET, 0);
+}
+DECLARE_DEFERRED(anx74xx_c0_cable_det_handler);
+DECLARE_HOOK(HOOK_CHIPSET_RESUME, anx74xx_c0_cable_det_handler, HOOK_PRIO_LAST);
+
+static void anx74xx_c1_cable_det_handler(void)
+{
+	int level = gpio_get_level(GPIO_USB_C1_CABLE_DET);
+
+	/*
+	 * Setting the low power is handled by DRP status hence
+	 * handle only the attach event.
+	 */
+	if (level)
+		anx74xx_handle_power_mode(I2C_PORT_TCPC1,
+					ANX74XX_NORMAL_MODE);
+
+	/* confirm if cable_det is asserted */
+	if (!level || gpio_get_level(GPIO_USB_C1_PD_RST_L))
+		return;
+
+	task_set_event(TASK_ID_PD_C1, PD_EVENT_TCPC_RESET, 0);
+}
+DECLARE_DEFERRED(anx74xx_c1_cable_det_handler);
+DECLARE_HOOK(HOOK_CHIPSET_RESUME, anx74xx_c1_cable_det_handler, HOOK_PRIO_LAST);
+
+void anx74xx_cable_det_interrupt(enum gpio_signal signal)
+{
+	/* Check if it is port 0 or 1, and debounce for 2 msec. */
+	if (signal == GPIO_USB_C0_CABLE_DET)
+		hook_call_deferred(&anx74xx_c0_cable_det_handler_data,
+				   (2 * MSEC));
+	else
+		hook_call_deferred(&anx74xx_c1_cable_det_handler_data,
+				   (2 * MSEC));
+}
+#endif
+
 #include "gpio_list.h"
 
 /* power signal list.  Must match order of enum power_signal. */
@@ -221,6 +276,12 @@ void board_tcpc_init(void)
 	gpio_enable_interrupt(GPIO_USB_C0_PD_INT_ODL);
 	gpio_enable_interrupt(GPIO_USB_C1_PD_INT_ODL);
 
+#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
+	/* Enable CABLE_DET interrupt for ANX3429 wake from standby */
+	gpio_enable_interrupt(GPIO_USB_C0_CABLE_DET);
+	gpio_enable_interrupt(GPIO_USB_C1_CABLE_DET);
+#endif
+
 	/*
 	 * Initialize HPD to low; after sysjump SOC needs to see
 	 * HPD pulse to enable video path
diff --git a/board/eve/board.h b/board/eve/board.h
index b69d3c78b9..0e9b325d4a 100644
--- a/board/eve/board.h
+++ b/board/eve/board.h
@@ -151,6 +151,7 @@
 #define CONFIG_USB_PD_PORT_COUNT 2
 #define CONFIG_USB_PD_QUIRK_SLOW_CC_STATUS
 #define CONFIG_USB_PD_VBUS_DETECT_CHARGER
+#define CONFIG_USB_PD_TCPC_LOW_POWER
 #define CONFIG_USB_PD_TCPM_MUX
 #define CONFIG_USB_PD_TCPM_ANX74XX
 #define CONFIG_USB_PD_TCPM_TCPCI
diff --git a/board/eve/gpio.inc b/board/eve/gpio.inc
index f53ca43ce6..87fc3b3929 100644
--- a/board/eve/gpio.inc
+++ b/board/eve/gpio.inc
@@ -23,6 +23,8 @@ GPIO_INT(VOLUME_UP_L,		PIN(8, 2), GPIO_INT_BOTH | GPIO_PULL_UP,	button_interrupt
 GPIO_INT(WP_L,			PIN(4, 0), GPIO_INT_BOTH,			switch_interrupt)
 GPIO_INT(AC_PRESENT,		PIN(C, 1), GPIO_INT_BOTH,			extpower_interrupt)
 GPIO_INT(ACCELGYRO3_INT_L,	PIN(9, 3), GPIO_INT_FALLING,			bmi160_interrupt)
+GPIO_INT(USB_C0_CABLE_DET,      PIN(D, 2), GPIO_INT_RISING,			anx74xx_cable_det_interrupt)
+GPIO_INT(USB_C1_CABLE_DET,      PIN(D, 3), GPIO_INT_RISING,			anx74xx_cable_det_interrupt)
 
 /* Lid KCJX9 accelerometer sensor interrupt */
 GPIO(ACCEL1_INT_L,			PIN(C, 7), GPIO_INPUT | GPIO_PULL_UP)
@@ -66,8 +68,6 @@ GPIO(DSP_WAKE_L,		PIN(C, 6), GPIO_INPUT | GPIO_SEL_1P8V)		/* INT# from DSP Mic *
 /* 5V enables: INPUT=1.5A, OUT_LOW=OFF, OUT_HIGH=3A */
 GPIO(USB_C0_5V_EN,		PIN(4, 2), GPIO_OUT_LOW | GPIO_PULL_UP)		/* C0 5V Enable */
 GPIO(USB_C1_5V_EN,		PIN(B, 1), GPIO_OUT_LOW | GPIO_PULL_UP)		/* C1 5V Enable */
-GPIO(USB_C0_CABLE_DET,		PIN(D, 2), GPIO_INPUT)				/* C0 Cable Detect */
-GPIO(USB_C1_CABLE_DET,		PIN(D, 3), GPIO_INPUT)				/* C1 Cable Detect */
 GPIO(USB_C0_PD_RST_L,		PIN(0, 3), GPIO_OUT_LOW)			/* C0 PD Reset */
 GPIO(USB_C1_PD_RST_L,		PIN(7, 4), GPIO_OUT_LOW)			/* C1 PD Reset */
 GPIO(USB_C0_DP_HPD,		PIN(9, 4), GPIO_INPUT)				/* C0 DP Hotplug Detect */