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author | Daniel Kochmański <dkochmanski@turtle-solutions.eu> | 2015-05-29 16:55:42 +0200 |
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committer | Hans de Goede <hdegoede@redhat.com> | 2015-07-24 16:17:08 +0200 |
commit | a151403fd2da05a6f05d1f0e16ff7b8986a73823 (patch) | |
tree | 3bfc03e35faf16e0a526efe1cd8868434248a898 /arch/arm/cpu/armv7/sunxi | |
parent | 645c48f50eab307a9879a82c4d066e74114ec78a (diff) | |
download | u-boot-imx-a151403fd2da05a6f05d1f0e16ff7b8986a73823.zip u-boot-imx-a151403fd2da05a6f05d1f0e16ff7b8986a73823.tar.gz u-boot-imx-a151403fd2da05a6f05d1f0e16ff7b8986a73823.tar.bz2 |
sunxi: spl: Detect at runtime where SPL was read from
Make possible using a single `u-boot-sunxi-with-spl.bin` binary for both NAND
memory and SD card. Detection where SPL was read from is implemented in
`spl_boot_device`.
Signed-off-by: Daniel Kochmański <dkochmanski@turtle-solutions.eu>
CC: Roy Spliet <r.spliet@ultimaker.com>
Cc: Ian Campbell <ijc@hellion.org.uk>
[hdegoede@redhat.com: Some small coding style fixes]
Acked-by: Hans De Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'arch/arm/cpu/armv7/sunxi')
-rw-r--r-- | arch/arm/cpu/armv7/sunxi/board.c | 52 |
1 files changed, 40 insertions, 12 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c index 5f39aa0..f01846e 100644 --- a/arch/arm/cpu/armv7/sunxi/board.c +++ b/arch/arm/cpu/armv7/sunxi/board.c @@ -11,6 +11,7 @@ */ #include <common.h> +#include <mmc.h> #include <i2c.h> #include <serial.h> #ifdef CONFIG_SPL_BUILD @@ -22,6 +23,7 @@ #include <asm/arch/gpio.h> #include <asm/arch/sys_proto.h> #include <asm/arch/timer.h> +#include <asm/arch/mmc.h> #include <linux/compiler.h> @@ -121,17 +123,18 @@ void s_init(void) } #ifdef CONFIG_SPL_BUILD +DECLARE_GLOBAL_DATA_PTR; + /* The sunxi internal brom will try to loader external bootloader * from mmc0, nand flash, mmc2. - * Unfortunately we can't check how SPL was loaded so assume - * it's always the first SD/MMC controller */ u32 spl_boot_device(void) { + struct mmc *mmc0, *mmc1; /* - * When booting from the SD card, the "eGON.BT0" signature is expected - * to be found in memory at the address 0x0004 (see the "mksunxiboot" - * tool, which generates this header). + * When booting from the SD card or NAND memory, the "eGON.BT0" + * signature is expected to be found in memory at the address 0x0004 + * (see the "mksunxiboot" tool, which generates this header). * * When booting in the FEL mode over USB, this signature is patched in * memory and replaced with something else by the 'fel' tool. This other @@ -139,15 +142,40 @@ u32 spl_boot_device(void) * valid bootable SD card image (because the BROM would refuse to * execute the SPL in this case). * - * This branch is just making a decision at runtime whether to load - * the main u-boot binary from the SD card (if the "eGON.BT0" signature - * is found) or return to the FEL code in the BROM to wait and receive - * the main u-boot binary over USB. + * This checks for the signature and if it is not found returns to + * the FEL code in the BROM to wait and receive the main u-boot + * binary over USB. If it is found, it determines where SPL was + * read from. */ - if (readl(4) == 0x4E4F4765 && readl(8) == 0x3054422E) /* eGON.BT0 */ - return BOOT_DEVICE_MMC1; - else + if (readl(4) != 0x4E4F4765 || readl(8) != 0x3054422E) /* eGON.BT0 */ return BOOT_DEVICE_BOARD; + + /* The BROM will try to boot from mmc0 first, so try that first. */ + mmc_initialize(gd->bd); + mmc0 = find_mmc_device(0); + if (sunxi_mmc_has_egon_boot_signature(mmc0)) + return BOOT_DEVICE_MMC1; + + /* Fallback to booting NAND if enabled. */ + if (IS_ENABLED(CONFIG_SPL_NAND_SUPPORT)) + return BOOT_DEVICE_NAND; + + if (CONFIG_MMC_SUNXI_SLOT_EXTRA == 2) { + mmc1 = find_mmc_device(1); + if (sunxi_mmc_has_egon_boot_signature(mmc1)) { + /* + * spl_mmc.c: spl_mmc_load_image() is hard-coded to + * use find_mmc_device(0), no matter what we + * return. Swap mmc0 and mmc2 to make this work. + */ + mmc0->block_dev.dev = 1; + mmc1->block_dev.dev = 0; + return BOOT_DEVICE_MMC2; + } + } + + panic("Could not determine boot source\n"); + return -1; /* Never reached */ } /* No confirmation data available in SPL yet. Hardcode bootmode */ |