soc/mediatek/mt8188: add usb host support

Add usb host function support.

TEST=read usb data successfully.
BUG=b:236331724

Signed-off-by: Shaocheng Wang <shaocheng.wang@mediatek.corp-partner.google.com>
Change-Id: I3494b687b811466cb6b988164d3c5b6fecc3016a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65754
Reviewed-by: Yidi Lin <yidilin@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8188/usb.c b/src/soc/mediatek/mt8188/usb.c
new file mode 100644
index 0000000000..8d1f513758
--- /dev/null
+++ b/src/soc/mediatek/mt8188/usb.c
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * This file is created based on MT8188 Functional Specification
+ * Chapter number: 5.5
+ */
+
+#include <device/mmio.h>
+#include <gpio.h>
+#include <soc/gpio.h>
+#include <soc/infracfg.h>
+#include <soc/pll_common.h>
+#include <soc/usb.h>
+
+void mtk_usb_prepare(void)
+{
+	mt_pll_set_usb_clock();
+
+	/* usb drvvbus for 5v power */
+	gpio_output(GPIO(USB1_DRV_VBUS), 1);
+}