USB-PD: Add hook for PD connect event

This patch adds a hook for USB PD connect event.

Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>

BUG=b/127228934
BRANCH=none
TEST=buildall. Verify a hook is called on BC12 charger connection.

Change-Id: I88fcd65d1afce07b6275398c5d0b902ecd7a44a3
Reviewed-on: https://chromium-review.googlesource.com/1597794
Commit-Ready: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>

9 files changed, 37 insertions, 6 deletions

diff --git a/common/hooks.c b/common/hooks.c
index ff85e2cfd2..fbdf8e414b 100644
--- a/common/hooks.c
+++ b/common/hooks.c
@@ -57,6 +57,7 @@ static const struct hook_ptrs hook_list[] = {
 	{__hooks_tick, __hooks_tick_end},
 	{__hooks_second, __hooks_second_end},
 	{__hooks_usb_pd_disconnect, __hooks_usb_pd_disconnect_end},
+	{__hooks_usb_pd_connect, __hooks_usb_pd_connect_end},
 };
 
 /* Times for deferrable functions */
diff --git a/common/usb_pd_protocol.c b/common/usb_pd_protocol.c
index 4582d5ffd2..f3f990bb25 100644
--- a/common/usb_pd_protocol.c
+++ b/common/usb_pd_protocol.c
@@ -3141,6 +3141,9 @@ void pd_task(void *u)
 				break;
 
 			/* Debounce complete */
+			if (IS_ENABLED(CONFIG_COMMON_RUNTIME))
+				hook_notify(HOOK_USB_PD_CONNECT);
+
 #ifdef CONFIG_USBC_PPC
 			/*
 			 * If the port is latched off, just continue to
@@ -3700,6 +3703,8 @@ void pd_task(void *u)
 			}
 
 			/* We are attached */
+			if (IS_ENABLED(CONFIG_COMMON_RUNTIME))
+				hook_notify(HOOK_USB_PD_CONNECT);
 			pd[port].polarity = get_snk_polarity(cc1, cc2);
 			set_polarity(port, pd[port].polarity);
 			/* reset message ID  on connection */
diff --git a/core/cortex-m/ec.lds.S b/core/cortex-m/ec.lds.S
index 2b6d39c060..1d759cf843 100644
--- a/core/cortex-m/ec.lds.S
+++ b/core/cortex-m/ec.lds.S
@@ -244,6 +244,10 @@ SECTIONS
         KEEP(*(.rodata.HOOK_USB_PD_DISCONNECT))
         __hooks_usb_pd_disconnect_end = .;
 
+        __hooks_usb_pd_connect = .;
+        KEEP(*(.rodata.HOOK_USB_PD_CONNECT))
+        __hooks_usb_pd_connect_end = .;
+
         __deferred_funcs = .;
         KEEP(*(.rodata.deferred))
         __deferred_funcs_end = .;
diff --git a/core/cortex-m0/ec.lds.S b/core/cortex-m0/ec.lds.S
index da6444dd14..fe356b8dc7 100644
--- a/core/cortex-m0/ec.lds.S
+++ b/core/cortex-m0/ec.lds.S
@@ -162,6 +162,10 @@ SECTIONS
         KEEP(*(.rodata.HOOK_USB_PD_DISCONNECT))
         __hooks_usb_pd_disconnect_end = .;
 
+        __hooks_usb_pd_connect = .;
+        KEEP(*(.rodata.HOOK_USB_PD_CONNECT))
+        __hooks_usb_pd_connect_end = .;
+
         __deferred_funcs = .;
         KEEP(*(.rodata.deferred))
         __deferred_funcs_end = .;
diff --git a/core/host/host_exe.lds b/core/host/host_exe.lds
index f4e72ec0d7..792ab36685 100644
--- a/core/host/host_exe.lds
+++ b/core/host/host_exe.lds
@@ -101,6 +101,10 @@ SECTIONS {
     *(.rodata.HOOK_USB_PD_DISCONNECT)
     __hooks_usb_pd_disconnect_end = .;
 
+    __hooks_usb_pd_connect = .;
+    KEEP(*(.rodata.HOOK_USB_PD_CONNECT))
+    __hooks_usb_pd_connect_end = .;
+
     __deferred_funcs = .;
     *(.rodata.deferred)
     __deferred_funcs_end = .;
diff --git a/core/minute-ia/ec.lds.S b/core/minute-ia/ec.lds.S
index 8087f7ce01..55102d5ae5 100644
--- a/core/minute-ia/ec.lds.S
+++ b/core/minute-ia/ec.lds.S
@@ -130,9 +130,13 @@ SECTIONS
 		KEEP(*(.rodata.HOOK_SECOND))
 		__hooks_second_end = .;
 
-                __hooks_usb_pd_disconnect = .;
-                KEEP(*(.rodata.HOOK_USB_PD_DISCONNECT))
-                __hooks_usb_pd_disconnect_end = .;
+		__hooks_usb_pd_disconnect = .;
+		KEEP(*(.rodata.HOOK_USB_PD_DISCONNECT))
+		__hooks_usb_pd_disconnect_end = .;
+
+		__hooks_usb_pd_connect = .;
+		KEEP(*(.rodata.HOOK_USB_PD_CONNECT))
+		__hooks_usb_pd_connect_end = .;
 
 		__deferred_funcs = .;
 		KEEP(*(.rodata.deferred))
diff --git a/core/nds32/ec.lds.S b/core/nds32/ec.lds.S
index bb115ed8df..751c2dc676 100644
--- a/core/nds32/ec.lds.S
+++ b/core/nds32/ec.lds.S
@@ -160,6 +160,10 @@ SECTIONS
         KEEP(*(.rodata.HOOK_USB_PD_DISCONNECT))
         __hooks_usb_pd_disconnect_end = .;
 
+        __hooks_usb_pd_connect = .;
+        KEEP(*(.rodata.HOOK_USB_PD_CONNECT))
+        __hooks_usb_pd_connect_end = .;
+
         __deferred_funcs = .;
         KEEP(*(.rodata.deferred))
         __deferred_funcs_end = .;
diff --git a/include/hooks.h b/include/hooks.h
index 8f865f81ed..24c8e6d418 100644
--- a/include/hooks.h
+++ b/include/hooks.h
@@ -205,11 +205,14 @@ enum hook_type {
 	HOOK_SECOND,
 
 	/*
-	 * Detect USB PD cc disconnect.
-	 *
-	 * Hook routines will be called from the PD task.
+	 * USB PD cc disconnect event.
 	 */
 	HOOK_USB_PD_DISCONNECT,
+
+	/*
+	 * USB PD cc connection event.
+	 */
+	HOOK_USB_PD_CONNECT,
 };
 
 struct hook_data {
diff --git a/include/link_defs.h b/include/link_defs.h
index 4dd0441824..efabebe300 100644
--- a/include/link_defs.h
+++ b/include/link_defs.h
@@ -70,6 +70,8 @@ extern const struct hook_data __hooks_second[];
 extern const struct hook_data __hooks_second_end[];
 extern const struct hook_data __hooks_usb_pd_disconnect[];
 extern const struct hook_data __hooks_usb_pd_disconnect_end[];
+extern const struct hook_data __hooks_usb_pd_connect[];
+extern const struct hook_data __hooks_usb_pd_connect_end[];
 
 /* Deferrable functions and firing times*/
 extern const struct deferred_data __deferred_funcs[];