From: Xu Ziyuan xzy.xu@rock-chips.com

If we would like to boot from SD card, we have to implement mmc driver in SPL stage, and get a slightly large SPL binary. Rockchip SoC's bootrom code has the ability to load spl and u-boot, then boot.

If CONFIG_ROCKCHIP_SPL_BACK_TO_BROM is enabled, the spl will return to bootrom in board_init_f(), then bootrom loads u-boot binary.

Loading sequence after rework: bootrom ==> spl ==> bootrom ==> u-boot

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

Changes in v5: - Revise some typos

Changes in v4: - Add acked flag from Simon - Rename to CONFIG_ROCKCHIP_SPL_BACK_TO_BROM - Add Kconfig option for this feature support - Revise some nits - Update comments a little - Update commit message

Changes in v3: - Add CONFIG_ROCKCHIP_RK3288_SPL_BACKTO_BROM for enabling this feature - Update doc/README.rockchip to instruct how to use it - Detailed commit message

Changes in v2: - Add sdcard iomux initlization in board_init() to fix sdmmc command sending timeout issue when booting from eMMC

arch/arm/mach-rockchip/Kconfig | 8 ++++++ arch/arm/mach-rockchip/Makefile | 1 + arch/arm/mach-rockchip/board.c | 33 ++++++++++++++++++++++ arch/arm/mach-rockchip/rk3036/Makefile | 1 - arch/arm/mach-rockchip/rk3288-board-spl.c | 5 +++- .../mach-rockchip/{rk3036 => }/save_boot_param.S | 2 +- doc/README.rockchip | 14 +++++++++ include/configs/rk3288_common.h | 5 ++++ 8 files changed, 66 insertions(+), 3 deletions(-) rename arch/arm/mach-rockchip/{rk3036 => }/save_boot_param.S (90%)

diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig index 2a8afac..6ecf9ca 100644 --- a/arch/arm/mach-rockchip/Kconfig +++ b/arch/arm/mach-rockchip/Kconfig @@ -17,6 +17,14 @@ config ROCKCHIP_RK3036 and video codec support. Peripherals include Gigabit Ethernet, USB2 host and OTG, SDIO, I2S, UART, SPI, I2C and PWMs.

+config ROCKCHIP_SPL_BACK_TO_BROM + bool "SPL returns to bootrom" + default y if ROCKCHIP_RK3036 + help + Rochchip SoCs have ability to load SPL & U-BOOT binary. This opinion, + if enabled, SPL will return to boorom, then load U-BOOT binary to keep + going on. + config SYS_MALLOC_F default y

diff --git a/arch/arm/mach-rockchip/Makefile b/arch/arm/mach-rockchip/Makefile index 55567cb..c08d61b 100644 --- a/arch/arm/mach-rockchip/Makefile +++ b/arch/arm/mach-rockchip/Makefile @@ -7,6 +7,7 @@ ifdef CONFIG_SPL_BUILD obj-$(CONFIG_ROCKCHIP_RK3288) += rk3288-board-spl.o obj-$(CONFIG_ROCKCHIP_RK3036) += rk3036-board-spl.o +obj-$(CONFIG_ROCKCHIP_SPL_BACK_TO_BROM) += save_boot_param.o else obj-$(CONFIG_ROCKCHIP_RK3288) += board.o endif diff --git a/arch/arm/mach-rockchip/board.c b/arch/arm/mach-rockchip/board.c index 816540e..b07e073 100644 --- a/arch/arm/mach-rockchip/board.c +++ b/arch/arm/mach-rockchip/board.c @@ -10,12 +10,45 @@ #include <ram.h> #include <asm/io.h> #include <asm/arch/clock.h> +#include <asm/arch/periph.h> +#include <asm/gpio.h> +#include <dm/pinctrl.h>

DECLARE_GLOBAL_DATA_PTR;

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. + */ + ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl); + if (ret) { + debug("%s: Cannot find pinctrl device\n", __func__); + goto err; + } + ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_SDCARD); + if (ret) { + debug("%s: Failed to set up SD card\n", __func__); + goto err; + } + + return 0; +err: + printf("board_init: Error %d\n", ret); + + /* No way to report error here */ + hang(); + + return -1; +#else return 0; +#endif }

int dram_init(void) diff --git a/arch/arm/mach-rockchip/rk3036/Makefile b/arch/arm/mach-rockchip/rk3036/Makefile index 97d299d..6095777 100644 --- a/arch/arm/mach-rockchip/rk3036/Makefile +++ b/arch/arm/mach-rockchip/rk3036/Makefile @@ -10,4 +10,3 @@ obj-y += syscon_rk3036.o endif

obj-y += sdram_rk3036.o -obj-y += save_boot_param.o diff --git a/arch/arm/mach-rockchip/rk3288-board-spl.c b/arch/arm/mach-rockchip/rk3288-board-spl.c index 773ea42..0728e64 100644 --- a/arch/arm/mach-rockchip/rk3288-board-spl.c +++ b/arch/arm/mach-rockchip/rk3288-board-spl.c @@ -151,7 +151,7 @@ static int configure_emmc(struct udevice *pinctrl) return 0; } #endif - +extern void back_to_bootrom(void); void board_init_f(ulong dummy) { struct udevice *pinctrl; @@ -206,6 +206,9 @@ void board_init_f(ulong dummy) debug("DRAM init failed: %d\n", ret); return; } +#ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM + back_to_bootrom(); +#endif }

static int setup_led(void) diff --git a/arch/arm/mach-rockchip/rk3036/save_boot_param.S b/arch/arm/mach-rockchip/save_boot_param.S similarity index 90% rename from arch/arm/mach-rockchip/rk3036/save_boot_param.S rename to arch/arm/mach-rockchip/save_boot_param.S index 778ec83..85b407b 100644 --- a/arch/arm/mach-rockchip/rk3036/save_boot_param.S +++ b/arch/arm/mach-rockchip/save_boot_param.S @@ -1,5 +1,5 @@ /* - * (C) Copyright 2015 Google, Inc + * (C) Copyright 2016 Rockchip Electronics Co., Ltd * * SPDX-License-Identifier: GPL-2.0+ */ diff --git a/doc/README.rockchip b/doc/README.rockchip index f4e8348..3fc2582 100644 --- a/doc/README.rockchip +++ b/doc/README.rockchip @@ -120,6 +120,20 @@ something like: Hit any key to stop autoboot: 0 =>

+The rockchip bootrom can load and boot an initial spl, then continue to +load a second-level bootloader(ie. U-BOOT) as soon as it returns to bootrom. +Therefore RK3288 has another loading sequence like RK3036. The option of +U-Boot is controlled with this setting in U-Boot: + + #define CONFIG_ROCKCHIP_SPL_BACK_TO_BROM + +You can create the image via the following operations: + + ./firefly-rk3288/tools/mkimage -n rk3288 -T rksd -d \ + firefly-rk3288/spl/u-boot-spl-dtb.bin out && \ + cat firefly-rk3288/u-boot-dtb.bin >> out && \ + sudo dd if=out of=/dev/sdc seek=64 + If you have an HDMI cable attached you should see a video console.

For evb_rk3036 board: diff --git a/include/configs/rk3288_common.h b/include/configs/rk3288_common.h index 9d50d83..35584ac 100644 --- a/include/configs/rk3288_common.h +++ b/include/configs/rk3288_common.h @@ -33,7 +33,12 @@ #define CONFIG_SYS_NS16550_MEM32 #define CONFIG_SPL_BOARD_INIT

+#ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM +/* Bootrom will load u-boot binary to 0x0 once return from SPL */ +#define CONFIG_SYS_TEXT_BASE 0x00000000 +#else #define CONFIG_SYS_TEXT_BASE 0x00100000 +#endif #define CONFIG_SYS_INIT_SP_ADDR 0x00100000 #define CONFIG_SYS_LOAD_ADDR 0x00800800 #define CONFIG_SPL_STACK 0xff718000