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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>
This commit is contained in:
Liangfeng Wu 2016-09-15 17:16:54 +08:00 committed by Patrick Georgi
parent 681b6b9433
commit 737a7cc9f1
1 changed files with 15 additions and 0 deletions
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15
src/soc/rockchip/rk3399/usb.c
View File

@ -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);
}