rockchip: add fastboot support for rk3036 board

Enable fastboot feature on rk3036, please refer to doc/README.rockchip
for more detailed usage.

Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/rk3036-sdk.dts

@@ -41,6 +41,4 @@
 
 &usb_otg {
 	status = "okay";
-
-	dr_mode = "host";
 };

board/rockchip/evb_rk3036/evb_rk3036.c

@@ -47,3 +47,49 @@ void enable_caches(void)
 	dcache_enable();
 }
 #endif
+
+#if defined(CONFIG_USB_GADGET) && defined(CONFIG_USB_GADGET_DWC2_OTG)
+#include <usb.h>
+#include <usb/dwc2_udc.h>
+
+static struct dwc2_plat_otg_data rk3036_otg_data = {
+	.rx_fifo_sz	= 512,
+	.np_tx_fifo_sz	= 16,
+	.tx_fifo_sz	= 128,
+};
+
+int board_usb_init(int index, enum usb_init_type init)
+{
+	int node;
+	const char *mode;
+	bool matched = false;
+	const void *blob = gd->fdt_blob;
+
+	/* find the usb_otg node */
+	node = fdt_node_offset_by_compatible(blob, -1,
+					"rockchip,rk3288-usb");
+
+	while (node > 0) {
+		mode = fdt_getprop(blob, node, "dr_mode", NULL);
+		if (mode && strcmp(mode, "otg") == 0) {
+			matched = true;
+			break;
+		}
+
+		node = fdt_node_offset_by_compatible(blob, node,
+					"rockchip,rk3288-usb");
+	}
+	if (!matched) {
+		debug("Not found usb_otg device\n");
+		return -ENODEV;
+	}
+	rk3036_otg_data.regs_otg = fdtdec_get_addr(blob, node, "reg");
+
+	return dwc2_udc_probe(&rk3036_otg_data);
+}
+
+int board_usb_cleanup(int index, enum usb_init_type init)
+{
+	return 0;
+}
+#endif

board/rockchip/kylin_rk3036/kylin_rk3036.c

@@ -79,3 +79,49 @@ void enable_caches(void)
 	dcache_enable();
 }
 #endif
+
+#if defined(CONFIG_USB_GADGET) && defined(CONFIG_USB_GADGET_DWC2_OTG)
+#include <usb.h>
+#include <usb/dwc2_udc.h>
+
+static struct dwc2_plat_otg_data rk3036_otg_data = {
+	.rx_fifo_sz	= 512,
+	.np_tx_fifo_sz	= 16,
+	.tx_fifo_sz	= 128,
+};
+
+int board_usb_init(int index, enum usb_init_type init)
+{
+	int node;
+	const char *mode;
+	bool matched = false;
+	const void *blob = gd->fdt_blob;
+
+	/* find the usb_otg node */
+	node = fdt_node_offset_by_compatible(blob, -1,
+					"rockchip,rk3288-usb");
+
+	while (node > 0) {
+		mode = fdt_getprop(blob, node, "dr_mode", NULL);
+		if (mode && strcmp(mode, "otg") == 0) {
+			matched = true;
+			break;
+		}
+
+		node = fdt_node_offset_by_compatible(blob, node,
+					"rockchip,rk3288-usb");
+	}
+	if (!matched) {
+		debug("Not found usb_otg device\n");
+		return -ENODEV;
+	}
+	rk3036_otg_data.regs_otg = fdtdec_get_addr(blob, node, "reg");
+
+	return dwc2_udc_probe(&rk3036_otg_data);
+}
+
+int board_usb_cleanup(int index, enum usb_init_type init)
+{
+	return 0;
+}
+#endif

include/configs/rk3036_common.h

@@ -6,7 +6,7 @@
 #ifndef __CONFIG_RK3036_COMMON_H
 #define __CONFIG_RK3036_COMMON_H
 
-#define CONFIG_SYS_CACHELINE_SIZE	32
+#define CONFIG_SYS_CACHELINE_SIZE	64
 
 #include <asm/arch/hardware.h>
 
@@ -60,6 +60,25 @@
 #define CONFIG_SF_DEFAULT_SPEED 20000000
 
 #ifndef CONFIG_SPL_BUILD
+/* usb otg */
+#define CONFIG_USB_GADGET
+#define CONFIG_USB_GADGET_DUALSPEED
+#define CONFIG_USB_GADGET_DWC2_OTG
+#define CONFIG_USB_GADGET_VBUS_DRAW	0
+
+/* fastboot  */
+#define CONFIG_CMD_FASTBOOT
+#define CONFIG_USB_FUNCTION_FASTBOOT
+#define CONFIG_FASTBOOT_FLASH
+#define CONFIG_FASTBOOT_FLASH_MMC_DEV	0
+#define CONFIG_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR
+#define CONFIG_FASTBOOT_BUF_SIZE	0x08000000
+
+#define CONFIG_USB_GADGET_DOWNLOAD
+#define CONFIG_G_DNL_MANUFACTURER	"Rockchip"
+#define CONFIG_G_DNL_VENDOR_NUM		0x2207
+#define CONFIG_G_DNL_PRODUCT_NUM	0x310a
+
 #include <config_distro_defaults.h>
 
 #define ENV_MEM_LAYOUT_SETTINGS \