diff options
| author | Liangfeng Wu <wulf@rock-chips.com> | 2016-09-15 17:16:54 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2016-10-06 21:51:45 +0200 |
| commit | 737a7cc9f13e6c2939d7fd80716e33a729fc3ca5 (patch) | |
| tree | 66ef71d18a555a84b933113a9e862b8a82eb607a /src/soc/rockchip/rk3399/usb.c | |
| parent | 681b6b94338f2ac8cc35e45ac5f84737b92357c3 (diff) | |
| download | coreboot-737a7cc9f13e6c2939d7fd80716e33a729fc3ca5.tar.xz | |
rockchip/rk3399: Configure USB3 controller to work in USB2 only mode
In USB2 only mode, the Type-C PHY will be held in reset and
only the USB2 logic of the USB3 OTG controller and PHY will be
used over the USB2 pins on the Type-C connector to support Low,
Full and High-speed USB operation.
BRANCH=none
BUG=chrome-os-partner:56425
TEST=Go to recovery mode, plug a Type-C USB drive containing
chrome OS image into both ports in all orientations, check if
system can boot from USB.
Change-Id: Ic265c0c91c24f63b2f9c3106eb2bb277a589233b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: a37ccc5b6019967483eac6b5a360d67bc3326e93
Original-Change-Id: I582f04f84eef447ff0ba691ce60e9461ed31cfad
Original-Signed-off-by: Liangfeng Wu <wulf@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/385837
Original-Commit-Ready: Julius Werner <jwerner@chromium.org>
Original-Tested-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/16717
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/soc/rockchip/rk3399/usb.c')
| -rw-r--r-- | src/soc/rockchip/rk3399/usb.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/soc/rockchip/rk3399/usb.c b/src/soc/rockchip/rk3399/usb.c index f638a1ece2..4c731bdf17 100644 --- a/src/soc/rockchip/rk3399/usb.c +++ b/src/soc/rockchip/rk3399/usb.c @@ -17,6 +17,9 @@ #include <assert.h> #include <console/console.h> #include <delay.h> +#include <soc/clock.h> +#include <soc/grf.h> +#include <soc/soc.h> #include <soc/usb.h> /* SuperSpeed over Type-C is hard. We don't care about speed in firmware: just @@ -86,12 +89,24 @@ static void setup_dwc3(struct rockchip_usb_dwc3 *dwc3) void reset_usb_otg0(void) { + /* Keep whole USB OTG0 controller in reset, then + * configure controller to work in USB 2.0 only mode. */ + write32(&cru_ptr->softrst_con[18], RK_SETBITS(1 << 5)); + write32(&rk3399_grf->usb3otg0_con1, RK_CLRSETBITS(0xf << 12, 1 << 0)); + write32(&cru_ptr->softrst_con[18], RK_CLRBITS(1 << 5)); + printk(BIOS_DEBUG, "Starting DWC3 reset for USB OTG0\n"); reset_dwc3(rockchip_usb_otg0_dwc3); } void reset_usb_otg1(void) { + /* Keep whole USB OTG1 controller in reset, then + * configure controller to work in USB 2.0 only mode. */ + write32(&cru_ptr->softrst_con[18], RK_SETBITS(1 << 6)); + write32(&rk3399_grf->usb3otg1_con1, RK_CLRSETBITS(0xf << 12, 1 << 0)); + write32(&cru_ptr->softrst_con[18], RK_CLRBITS(1 << 6)); + printk(BIOS_DEBUG, "Starting DWC3 reset for USB OTG1\n"); reset_dwc3(rockchip_usb_otg1_dwc3); } |