diff options
Diffstat (limited to 'src/mainboard/google/gru/mainboard.c')
| -rw-r--r-- | src/mainboard/google/gru/mainboard.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/mainboard/google/gru/mainboard.c b/src/mainboard/google/gru/mainboard.c index 7e360e7880..dd986c4348 100644 --- a/src/mainboard/google/gru/mainboard.c +++ b/src/mainboard/google/gru/mainboard.c @@ -15,9 +15,11 @@ */ #include <boardid.h> +#include <console/console.h> #include <delay.h> #include <device/device.h> #include <device/i2c.h> +#include <ec/google/chromeec/ec.h> #include <gpio.h> #include <soc/bl31_plat_params.h> #include <soc/clock.h> @@ -230,6 +232,17 @@ static void configure_display(void) gpio_output(GPIO(4, D, 3), 1); /* CPU3_EDP_VDDEN for P3.3V_DISP */ } +static void usb_power_cycle(int port) +{ + if (google_chromeec_set_usb_pd_role(port, USB_PD_CTRL_ROLE_FORCE_SINK)) + printk(BIOS_ERR, "ERROR: Cannot force USB%d PD sink\n", port); + + mdelay(10); /* Make sure USB stick is fully depowered. */ + + if (google_chromeec_set_usb_pd_role(port, USB_PD_CTRL_ROLE_TOGGLE_ON)) + printk(BIOS_ERR, "ERROR: Cannot restore USB%d PD mode\n", port); +} + static void setup_usb(void) { /* A few magic PHY tuning values that improve eye diagram amplitude @@ -269,6 +282,17 @@ static void setup_usb(void) setup_usb_otg0(); setup_usb_otg1(); + + /* + * Need to power-cycle USB ports for use in firmware, since some devices + * can't fall back to USB 2.0 after they saw SuperSpeed terminations. + * This takes about a dozen milliseconds, so only do it in boot modes + * that have firmware UI (which one could select USB boot from). + */ + if (display_init_required()) { + usb_power_cycle(0); + usb_power_cycle(1); + } } static void mainboard_init(device_t dev) |