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sifive: fu540: Add runtime boot mode detection

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Add support to detect boot mode at runtime for
SiFive FU540 boards.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Tested-by: Bin Meng <bin.meng@windriver.com>
This commit is contained in:
Jagan Teki 2020-07-15 15:38:58 +05:30 committed by Andes
parent 3d5ac3536b
commit 868e295ef7
1 changed files with 19 additions and 6 deletions
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25
board/sifive/fu540/fu540.c
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@ -10,6 +10,7 @@
#include <env.h>
#include <init.h>
#include <log.h>
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/io.h>
@ -128,14 +129,26 @@ int board_init(void)
}
#ifdef CONFIG_SPL
#define MODE_SELECT_REG 0x1000
#define MODE_SELECT_QSPI 0x6
#define MODE_SELECT_SD 0xb
#define MODE_SELECT_MASK GENMASK(3, 0)
u32 spl_boot_device(void)
{
#ifdef CONFIG_SPL_MMC_SUPPORT
return BOOT_DEVICE_MMC1;
#else
puts("Unknown boot device\n");
hang();
#endif
u32 mode_select = readl((void *)MODE_SELECT_REG);
u32 boot_device = mode_select & MODE_SELECT_MASK;
switch (boot_device) {
case MODE_SELECT_QSPI:
return BOOT_DEVICE_SPI;
case MODE_SELECT_SD:
return BOOT_DEVICE_MMC1;
default:
debug("Unsupported boot device 0x%x but trying MMC1\n",
boot_device);
return BOOT_DEVICE_MMC1;
}
}
#endif