diff options
Diffstat (limited to 'arch/arm/mach-at91/include/mach/sama5_bootsource.h')
-rw-r--r-- | arch/arm/mach-at91/include/mach/sama5_bootsource.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/include/mach/sama5_bootsource.h b/arch/arm/mach-at91/include/mach/sama5_bootsource.h new file mode 100644 index 0000000000..29354dcaf3 --- /dev/null +++ b/arch/arm/mach-at91/include/mach/sama5_bootsource.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef AT91_SAMA5_BOOTSOURCE_H_ +#define AT91_SAMA5_BOOTSOURCE_H_ + +#include <errno.h> +#include <bootsource.h> +#include <linux/bitops.h> +#include <linux/bitfield.h> +#include <mach/hardware.h> + +/* Boot modes stored by BootROM in r4 */ +#define SAMA5_BOOTSOURCE_SPI 0 +#define SAMA5_BOOTSOURCE_MCI 1 +#define SAMA5_BOOTSOURCE_SMC 2 +#define SAMA5_BOOTSOURCE_TWI 3 +#define SAMA5_BOOTSOURCE_QSPI 4 +#define SAMA5_BOOTSOURCE_SAM_BA 7 + +#define SAMA5_BOOTSOURCE GENMASK(3, 0) +#define SAMA5_BOOTSOURCE_INSTANCE GENMASK(7, 4) + +static inline int sama5_bootsource(u32 reg) +{ + u32 dev = FIELD_GET(SAMA5_BOOTSOURCE, reg); + + switch(dev) { + case SAMA5_BOOTSOURCE_MCI: + return BOOTSOURCE_MMC; + case SAMA5_BOOTSOURCE_SPI: + return BOOTSOURCE_SPI_NOR; + case SAMA5_BOOTSOURCE_QSPI: + return BOOTSOURCE_SPI; + case SAMA5_BOOTSOURCE_SMC: + return BOOTSOURCE_NAND; + case SAMA5_BOOTSOURCE_SAM_BA: + return BOOTSOURCE_SERIAL; + } + return BOOTSOURCE_UNKNOWN; +} + +static inline int sama5_bootsource_instance(u32 reg) +{ + return FIELD_GET(SAMA5_BOOTSOURCE_INSTANCE, reg); +} + +#endif |