This introduces code to read the value of the SYS_BOOT pins on the OMAP5, as well as the memory-preferred scheme for the interpretation of each value.
Signed-off-by: Paul Kocialkowski contact@paulk.fr --- arch/arm/cpu/armv7/omap5/Makefile | 1 + arch/arm/cpu/armv7/omap5/boot.c | 46 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+) create mode 100644 arch/arm/cpu/armv7/omap5/boot.c
diff --git a/arch/arm/cpu/armv7/omap5/Makefile b/arch/arm/cpu/armv7/omap5/Makefile index e709f14..f2930d5 100644 --- a/arch/arm/cpu/armv7/omap5/Makefile +++ b/arch/arm/cpu/armv7/omap5/Makefile @@ -5,6 +5,7 @@ # SPDX-License-Identifier: GPL-2.0+ #
+obj-y += boot.o obj-y += hwinit.o obj-y += emif.o obj-y += sdram.o diff --git a/arch/arm/cpu/armv7/omap5/boot.c b/arch/arm/cpu/armv7/omap5/boot.c new file mode 100644 index 0000000..583becc --- /dev/null +++ b/arch/arm/cpu/armv7/omap5/boot.c @@ -0,0 +1,46 @@ +/* + * OMAP5 boot + * + * Copyright (C) 2015 Paul Kocialkowski contact@paulk.fr + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/omap_common.h> +#include <spl.h> + +static u32 boot_devices[] = { +#if defined(CONFIG_DRA7XX) || defined(CONFIG_AM57XX) + BOOT_DEVICE_MMC2, + BOOT_DEVICE_NAND, + BOOT_DEVICE_MMC1, + BOOT_DEVICE_SATA, + BOOT_DEVICE_XIP, + BOOT_DEVICE_XIP, + BOOT_DEVICE_SPI, + BOOT_DEVICE_SPI, +#else + BOOT_DEVICE_MMC2, + BOOT_DEVICE_NAND, + BOOT_DEVICE_MMC1, + BOOT_DEVICE_SATA, + BOOT_DEVICE_XIP, + BOOT_DEVICE_MMC2, + BOOT_DEVICE_XIPWAIT, +#endif +}; + +u32 omap_sys_boot_device(void) +{ + u32 sys_boot; + + /* Grab the first 4 bits of the status register for SYS_BOOT. */ + sys_boot = readl((u32 *) (*ctrl)->control_status) & ((1 << 4) - 1); + + if (sys_boot >= (sizeof(boot_devices) / sizeof(u32))) + return BOOT_DEVICE_NONE; + + return boot_devices[sys_boot]; +}