rockchip: add boot-mode support for rk3288, rk3036

rockchip platform have a protocol to pass the the kernel reboot mode to bootloader
by some special registers when system reboot. In bootloader we should read it and take action.

We can only setup boot_mode in board_late_init becasue "setenv" need env setuped.
So add CONFIG_BOARD_LATE_INIT to common header and use a entry "rk_board_late_init"
to replace "board_late_init" in board file.

Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/arm/include/asm/arch-rockchip/boot_mode.h

@@ -0,0 +1,19 @@
+#ifndef __REBOOT_MODE_H
+#define __REBOOT_MODE_H
+
+/* high 24 bits is tag, low 8 bits is type */
+#define REBOOT_FLAG		0x5242C300
+/* normal boot */
+#define BOOT_NORMAL		(REBOOT_FLAG + 0)
+/* enter loader rockusb mode */
+#define BOOT_LOADER		(REBOOT_FLAG + 1)
+/* enter recovery */
+#define BOOT_RECOVERY		(REBOOT_FLAG + 3)
+/* enter fastboot mode */
+#define BOOT_FASTBOOT		(REBOOT_FLAG + 9)
+/* enter charging mode */
+#define BOOT_CHARGING		(REBOOT_FLAG + 11)
+/* enter usb mass storage mode */
+#define BOOT_UMS		(REBOOT_FLAG + 12)
+
+#endif

arch/arm/mach-rockchip/rk3036-board.c

@@ -11,11 +11,50 @@
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/periph.h>
+#include <asm/arch/grf_rk3036.h>
+#include <asm/arch/boot_mode.h>
+#include <asm/arch/sdram_rk3036.h>
 #include <asm/gpio.h>
 #include <dm/pinctrl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define GRF_BASE	0x20008000
+
+static void setup_boot_mode(void)
+{
+	struct rk3036_grf *const grf = (void *)GRF_BASE;
+	int boot_mode = readl(&grf->os_reg[4]);
+
+	debug("boot mode %x.\n", boot_mode);
+
+	/* Clear boot mode */
+	writel(BOOT_NORMAL, &grf->os_reg[4]);
+
+	switch (boot_mode) {
+	case BOOT_FASTBOOT:
+		printf("enter fastboot!\n");
+		setenv("preboot", "setenv preboot; fastboot usb0");
+		break;
+	case BOOT_UMS:
+		printf("enter UMS!\n");
+		setenv("preboot", "setenv preboot; ums mmc 0");
+		break;
+	}
+}
+
+__weak int rk_board_late_init(void)
+{
+	return 0;
+}
+
+int board_late_init(void)
+{
+	setup_boot_mode();
+
+	return rk_board_late_init();
+}
+
 int board_init(void)
 {
 	return 0;

arch/arm/mach-rockchip/rk3288-board.c

@@ -8,25 +8,65 @@
 #include <clk.h>
 #include <dm.h>
 #include <ram.h>
+#include <syscon.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/periph.h>
+#include <asm/arch/pmu_rk3288.h>
+#include <asm/arch/boot_mode.h>
 #include <asm/gpio.h>
 #include <dm/pinctrl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define PMU_BASE	0xff730000
+
+static void setup_boot_mode(void)
+{
+	struct rk3288_pmu *const pmu = (void *)PMU_BASE;
+	int boot_mode = readl(&pmu->sys_reg[0]);
+
+	debug("boot mode %x.\n", boot_mode);
+
+	/* Clear boot mode */
+	writel(BOOT_NORMAL, &pmu->sys_reg[0]);
+
+	switch (boot_mode) {
+	case BOOT_FASTBOOT:
+		printf("enter fastboot!\n");
+		setenv("preboot", "setenv preboot; fastboot usb0");
+		break;
+	case BOOT_UMS:
+		printf("enter UMS!\n");
+		setenv("preboot", "setenv preboot; if mmc dev 0;"
+		       "then ums mmc 0; else ums mmc 1;fi");
+		break;
+	}
+}
+
+__weak int rk_board_late_init(void)
+{
+	return 0;
+}
+
+int board_late_init(void)
+{
+	setup_boot_mode();
+
+	return rk_board_late_init();
+}
+
 int board_init(void)
 {
 #ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
 	struct udevice *pinctrl;
 	int ret;
 
-    /*
-     * We need to implement sdcard iomux here for the further
-     * initlization, otherwise, it'll hit sdcard command sending
-     * timeout exception.
-     */
+	/*
+	 * We need to implement sdcard iomux here for the further
+	 * initlization, otherwise, it'll hit sdcard command sending
+	 * timeout exception.
+	 */
 	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 	if (ret) {
 		debug("%s: Cannot find pinctrl device\n", __func__);

board/rockchip/kylin_rk3036/kylin_rk3036.c

@@ -8,14 +8,11 @@
 #include <dm.h>
 #include <asm/io.h>
 #include <asm/arch/uart.h>
-#include <asm/arch-rockchip/grf_rk3036.h>
 #include <asm/arch/sdram_rk3036.h>
 #include <asm/gpio.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#define GRF_BASE	0x20008000
-
 void get_ddr_config(struct rk3036_ddr_config *config)
 {
 	/* K4B4G1646Q config */
@@ -43,16 +40,9 @@ int fastboot_key_pressed(void)
 
 #define ROCKCHIP_BOOT_MODE_FASTBOOT	0x5242C309
 
-int board_late_init(void)
+int rk_board_late_init(void)
 {
-	struct rk3036_grf * const grf = (void *)GRF_BASE;
-	int boot_mode = readl(&grf->os_reg[4]);
-
-	/* Clear boot mode */
-	writel(0, &grf->os_reg[4]);
-
-	if (boot_mode == ROCKCHIP_BOOT_MODE_FASTBOOT ||
-	    fastboot_key_pressed()) {
+	if (fastboot_key_pressed()) {
 		printf("enter fastboot!\n");
 		setenv("preboot", "setenv preboot; fastboot usb0");
 	}

include/configs/kylin_rk3036.h

@@ -25,7 +25,4 @@
 
 #endif
 
-#define CONFIG_BOARD_LATE_INIT
-#define CONFIG_PREBOOT
-
 #endif

include/configs/rk3036_common.h

@@ -113,4 +113,7 @@
 	BOOTENV
 #endif
 
+#define CONFIG_BOARD_LATE_INIT
+#define CONFIG_PREBOOT
+
 #endif

include/configs/rk3288_common.h

@@ -132,4 +132,7 @@
 	BOOTENV
 #endif
 
+#define CONFIG_BOARD_LATE_INIT
+#define CONFIG_PREBOOT
+
 #endif