arch/arm/include/asm/arch-npcm8xx/otp.h

/* SPDX-License-Identifier: GPL-2.0+ */

#ifndef _NPCM_OTP_H_
#define _NPCM_OTP_H_

#ifdef CONFIG_ARCH_NPCM8XX
enum {
	NPCM_KEY_SA    = 0,
	NPCM_FUSE_SA   = 0,
	NPCM_NUM_OF_SA   = 1
};
#else
enum {
	NPCM_KEY_SA    = 0,
	NPCM_FUSE_SA   = 1,
	NPCM_NUM_OF_SA = 2
};
#endif

/* arrray images in flash, to program during fisrt boot (offsets in sector) */
#define SA_KEYS_FLASH_IMAGE_OFFSET      (0x000)
#define SA_FUSE_FLASH_IMAGE_OFFSET      (0x400)
#define SA_TAG_FLASH_IMAGE_OFFSET       (0x800)
/*                                        F     U     S     E     I     M     G     S */
#define SA_TAG_FLASH_IMAGE_VAL          {0x46, 0x55, 0x53, 0x45, 0x49, 0x4d, 0x47, 0x53}
#define SA_TAG_FLASH_IMAGE_SIZE         (8)

#define SA_FUSE_FUSTRAP_OFFSET          (0x00)
#define SA_FUSE_FUSTRAP_OSECBOOT_MASK   (0x00800000)

struct npcm_otp_regs {
	unsigned int fst;
	unsigned int faddr;
	unsigned int fdata;
	unsigned int fcfg;
	unsigned int fustrap_fkeyind;
	unsigned int fctl;
};

#define FST_RDY                 BIT(0)
#define FST_RDST                BIT(1)
#define FST_RIEN                BIT(2)

#ifdef CONFIG_ARCH_NPCM8XX
#define FADDR_BYTEADDR(addr)        ((addr) << 3)
#define FADDR_BITPOS(pos)           ((pos) << 0)
#define FADDR_VAL(addr, pos)        (FADDR_BITPOS(pos) | FADDR_BYTEADDR(addr))
#define FADDR_IN_PROG               BIT(16)
#else
#define FADDR_BYTEADDR(addr)    ((addr) << 0)
#define FADDR_BITPOS(pos)       ((pos) << 10)
#define FADDR_VAL(addr, pos)    (FADDR_BYTEADDR(addr) | FADDR_BITPOS(pos))
#endif

#define FDATA_MASK              (0xff)

#define FUSTRAP_O_SECBOOT       BIT(23)
#define FCFG_FDIS               BIT(31)
#define FKEYIND_KVAL            BIT(0)
#define FKEYIND_KSIZE_MASK      (0x00000070)
#define FKEYIND_KSIZE_128       (0x4 << 4)
#define FKEYIND_KSIZE_192       (0x5 << 4)
#define FKEYIND_KSIZE_256       (0x6 << 4)
#define FKEYIND_KIND_MASK       (0x000c0000)
#define FKEYIND_KIND_KEY(indx)  ((indx) << 18)

/* Program cycle initiation values (sequence of two adjacent writes) */
#define PROGRAM_ARM             0x1
#define PROGRAM_INIT            0xBF79E5D0

/* Read cycle initiation value */
#define READ_INIT               0x02

/* Value to clean FDATA contents */
#define FDATA_CLEAN_VALUE       0x01

#ifdef CONFIG_ARCH_NPCM8XX
#define NPCM_OTP_ARR_BYTE_SIZE        8192
#else
#define NPCM_OTP_ARR_BYTE_SIZE        1024
#endif

#define MIN_PROGRAM_PULSES               4
#define MAX_PROGRAM_PULSES               20

int fuse_prog_image(u32 bank, uintptr_t address);
int  fuse_program_data(u32 bank, u32 word, u8 *data, u32 size);
int  npcm_otp_select_key(u8 key_index);
bool npcm_otp_is_fuse_array_disabled(u32 arr);
void npcm_otp_nibble_parity_ecc_encode(u8 *datain, u8 *dataout, u32 size);
void npcm_otp_majority_rule_ecc_encode(u8 *datain, u8 *dataout, u32 size);

#endif