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arm: mvebu: fix boot from UART when in fallback mode

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It's the first 8 bits of the bootrom error register that
contain the boot error/fallback error code. Let's check that
and continue to boot from UART.

Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Sean Nyekjaer 2017-11-24 14:01:28 +01:00 • committed by Stefan Roese
parent 348b488f5e
commit e83e2b3900
2 changed files with 15 additions and 0 deletions
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6
arch/arm/mach-mvebu/include/mach/soc.h
View file

@ -111,10 +111,16 @@
#define COMPHY_REFCLK_ALIGNMENT (MVEBU_REGISTER(0x182f8))
/* BootROM error register (also includes some status infos) */
#if defined(CONFIG_ARMADA_38X)
#define CONFIG_BOOTROM_ERR_REG (MVEBU_REGISTER(0x182d0))
#define BOOTROM_ERR_MODE_OFFS 0
#define BOOTROM_ERR_MODE_MASK (0xf << BOOTROM_ERR_MODE_OFFS)
#else
#define CONFIG_BOOTROM_ERR_REG (MVEBU_REGISTER(0x182d0))
#define BOOTROM_ERR_MODE_OFFS 28
#define BOOTROM_ERR_MODE_MASK (0xf << BOOTROM_ERR_MODE_OFFS)
#define BOOTROM_ERR_MODE_UART 0x6
#endif
#if defined(CONFIG_ARMADA_375)
/* SAR values for Armada 375 */

9
arch/arm/mach-mvebu/spl.c
View file

@ -26,7 +26,16 @@ static u32 get_boot_device(void)
val = readl(CONFIG_BOOTROM_ERR_REG);
boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS;
debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device);
#if defined(CONFIG_ARMADA_38X)
/*
* If the bootrom error register contains any else than zeros
* in the first 8 bits it's an error condition. And in that case
* try to boot from UART.
*/
if (boot_device)
#else
if (boot_device == BOOTROM_ERR_MODE_UART)
#endif
return BOOT_DEVICE_UART;
/*