Banshee: Config BBR USB3 bit for USB card port in suspend/resume

For some chromebooks design, there are expansion card (typeC to typeA)
communicate with TCPC through CC line, when the TypeA card connect to
chromebook the USB3_Connection bit would be enable even no connect USBA
device.

It will increase BBR power consumption, so clear 'USB3_Connection' bit
in S0ix and enable when return S0.

Suspend -> Set BBR USB3 connection bit to 0 for port that is in USB3
connection.

Resume -> Unplug any type-c device in suspend will wake up the system
in current Chrome OS, so enable USB3_Connection bit should be perfromed
for another resume case which is USB3 device still in connection.

BUG=b:233975818
BRANCH=None
TEST=Test on Banshee, BBR USB3 connection bit is correct in S0/S0ix state.

Signed-off-by: johnwc_yeh <johnwc_yeh@compal.corp-partner.google.com>
Change-Id: Ie6cb5d64578663a8e93378e3c78359e7cdd19327
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3754781
Reviewed-by: Elthan Huang <elthan_huang@compal.corp-partner.google.com>
Reviewed-by: Elmo Lan <elmo_lan@compal.corp-partner.google.com>
Reviewed-by: Diana Z <dzigterman@chromium.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/board/banshee/board.c b/board/banshee/board.c
index c751400d79..0814f35a9b 100644
--- a/board/banshee/board.c
+++ b/board/banshee/board.c
@@ -16,6 +16,7 @@
 #include "hooks.h"
 #include "driver/als_tcs3400.h"
 #include "driver/charger/isl9241.h"
+#include "driver/retimer/bb_retimer.h"
 #include "fw_config.h"
 #include "hooks.h"
 #include "keyboard_customization.h"
@@ -33,15 +34,38 @@
 #define CPRINTF(format, args...) cprintf(CC_CHARGER, format, ##args)
 #define CPRINTS(format, args...) cprints(CC_CHARGER, format, ##args)
 
+/*
+ * USBA card connect to chromebook the USB_3_CONNECTION
+ * bit would be enable.
+ * It will increase BBR power consumption, so clear
+ * USB3_Connection bit in S0ix and enable when return S0.
+ */
+void set_bb_retimer_usb3_state(bool enable)
+{
+	mux_state_t mux_state = 0;
+
+	for (int i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
+		const struct usb_mux *mux = &usb_muxes[i];
+
+		mux_state = usb_mux_get(i);
+
+		if ((mux_state & USB_PD_MUX_USB_ENABLED)) {
+			bb_retimer_set_usb3(mux, enable);
+		}
+	}
+}
+
 /* Called on AP S3 -> S0 transition */
 static void board_chipset_resume(void)
 {
+	set_bb_retimer_usb3_state(true);
 }
 DECLARE_HOOK(HOOK_CHIPSET_RESUME, board_chipset_resume, HOOK_PRIO_DEFAULT);
 
 /* Called on AP S0 -> S3 transition */
 static void board_chipset_suspend(void)
 {
+	set_bb_retimer_usb3_state(false);
 }
 DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);