libpayload: usb: dwc2: support split transaction

With split transaction, dwc2 host controller can handle full- and
low-speed devices on hub in high-speed mode. This commit adds support
for split control and interrupt transfers

BUG=None
TEST=Connect usb keyboard through hub, usb keyboard can work
BRANCH=None

Change-Id: If7a00db21c8ad4c635f39581382b877603075d1a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4fb514b7f7f7e414fa94bfce05420957b1c57019
Original-Change-Id: I07e64064c6182d33905ae4efb13712645de7cf93
Original-Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/283282
Original-Tested-by: Lin Huang <hl@rock-chips.com>
Original-Commit-Queue: Lin Huang <hl@rock-chips.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/10956
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/payloads/libpayload/drivers/usb/dwc2_private.h b/payloads/libpayload/drivers/usb/dwc2_private.h
index c1090420ec..5b1a547f8d 100644
--- a/payloads/libpayload/drivers/usb/dwc2_private.h
+++ b/payloads/libpayload/drivers/usb/dwc2_private.h
@@ -36,6 +36,11 @@ typedef struct {
 	u32 timestamp;
 } intr_queue_t;
 
+typedef struct {
+	int hubaddr;
+	int hubport;
+} split_info_t;
+
 #define DWC2_INST(controller) ((dwc_ctrl_t *)((controller)->instance))
 #define DWC2_REG(controller) ((dwc2_reg_t *)((controller)->reg_base))
 
@@ -44,6 +49,9 @@ typedef enum {
 	HCSTAT_XFERERR,
 	HCSTAT_BABBLE,
 	HCSTAT_STALL,
+	HCSTAT_ACK,
+	HCSTAT_NAK,
+	HCSTAT_NYET,
 	HCSTAT_UNKNOW,
 	HCSTAT_TIMEOUT,
 } hcstat_t;