--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/*
+ * Copyright (C) 2020 by Nuvoton Technology Corporation
+ * Mulin Chao <mlchao@nuvoton.com>
+ * Wealian Liao <WHLIAO@nuvoton.com>
+ */
+
+#ifndef OPENOCD_LOADERS_FLASH_NPCX_NPCX_FLASH_H
+#define OPENOCD_LOADERS_FLASH_NPCX_NPCX_FLASH_H
+
+#include "npcx_flash_config.h"
+
+/* Bit functions */
+#define NPCX_SET_BIT(reg, bit) ((reg) |= (0x1 << (bit)))
+#define NPCX_CLEAR_BIT(reg, bit) ((reg) &= (~(0x1 << (bit))))
+#define NPCX_IS_BIT_SET(reg, bit) (((reg) >> (bit)) & (0x1))
+
+/* Field functions */
+#define NPCX_GET_POS_FIELD(pos, size) (pos)
+#define NPCX_GET_SIZE_FIELD(pos, size) (size)
+#define NPCX_FIELD_POS(field) NPCX_GET_POS_##field
+#define NPCX_FIELD_SIZE(field) NPCX_GET_SIZE_##field
+/* Read field functions */
+#define NPCX_GET_FIELD(reg, field) \
+ _NPCX_GET_FIELD_((reg), NPCX_FIELD_POS(field), NPCX_FIELD_SIZE(field))
+#define _NPCX_GET_FIELD_(reg, f_pos, f_size) \
+ (((reg) >> (f_pos)) & ((1 << (f_size)) - 1))
+/* Write field functions */
+#define NPCX_SET_FIELD(reg, field, value) \
+ _NPCX_SET_FIELD_((reg), NPCX_FIELD_POS(field), NPCX_FIELD_SIZE(field), (value))
+#define _NPCX_SET_FIELD_(reg, f_pos, f_size, value) \
+ ((reg) = ((reg) & (~(((1 << (f_size)) - 1) << (f_pos)))) | ((value) << (f_pos)))
+
+/* Register definitions */
+#define NPCX_REG32_ADDR(addr) ((volatile uint32_t *)(addr))
+#define NPCX_REG16_ADDR(addr) ((volatile uint16_t *)(addr))
+#define NPCX_REG8_ADDR(addr) ((volatile uint8_t *)(addr))
+
+#define NPCX_HW_BYTE(addr) (*NPCX_REG8_ADDR(addr))
+#define NPCX_HW_WORD(addr) (*NPCX_REG16_ADDR(addr))
+#define NPCX_HW_DWORD(addr) (*NPCX_REG32_ADDR(addr))
+
+/* Devalt */
+#define NPCX_SCFG_BASE_ADDR 0x400C3000
+#define NPCX_DEVCNT NPCX_HW_BYTE(NPCX_SCFG_BASE_ADDR + 0x000)
+#define NPCX_DEVALT(n) NPCX_HW_BYTE(NPCX_SCFG_BASE_ADDR + 0x010 + (n))
+
+#define NPCX_DEVCNT_HIF_TYP_SEL_FIELD FIELD(2, 2)
+#define NPCX_DEVCNT_JEN0_HEN 4
+#define NPCX_DEVCNT_JEN1_HEN 5
+#define NPCX_DEVCNT_F_SPI_TRIS 6
+
+/* Pin-mux for SPI/FIU */
+#define NPCX_DEVALT0_SPIP_SL 0
+#define NPCX_DEVALT0_GPIO_NO_SPIP 3
+#define NPCX_DEVALT0_F_SPI_CS1_2 4
+#define NPCX_DEVALT0_F_SPI_CS1_1 5
+#define NPCX_DEVALT0_F_SPI_QUAD 6
+#define NPCX_DEVALT0_NO_F_SPI 7
+
+/* Flash Interface Unit (FIU) registers */
+#define NPCX_FIU_BASE_ADDR 0x40020000
+#define NPCX_FIU_CFG NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x000)
+#define NPCX_BURST_CFG NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x001)
+#define NPCX_RESP_CFG NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x002)
+#define NPCX_SPI_FL_CFG NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x014)
+#define NPCX_UMA_CODE NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x016)
+#define NPCX_UMA_AB0 NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x017)
+#define NPCX_UMA_AB1 NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x018)
+#define NPCX_UMA_AB2 NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x019)
+#define NPCX_UMA_DB0 NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x01A)
+#define NPCX_UMA_DB1 NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x01B)
+#define NPCX_UMA_DB2 NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x01C)
+#define NPCX_UMA_DB3 NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x01D)
+#define NPCX_UMA_CTS NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x01E)
+#define NPCX_UMA_ECTS NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x01F)
+#define NPCX_UMA_DB0_3 NPCX_HW_DWORD(NPCX_FIU_BASE_ADDR + 0x020)
+#define NPCX_FIU_RD_CMD NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x030)
+#define NPCX_FIU_DMM_CYC NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x032)
+#define NPCX_FIU_EXT_CFG NPCX_HW_BYTE(NPCX_FIU_BASE_ADDR + 0x033)
+#define NPCX_FIU_UMA_AB0_3 NPCX_HW_DWORD(NPCX_FIU_BASE_ADDR + 0x034)
+
+/* FIU register fields */
+#define NPCX_RESP_CFG_IAD_EN 0
+#define NPCX_RESP_CFG_DEV_SIZE_EX 2
+#define NPCX_UMA_CTS_A_SIZE 3
+#define NPCX_UMA_CTS_C_SIZE 4
+#define NPCX_UMA_CTS_RD_WR 5
+#define NPCX_UMA_CTS_DEV_NUM 6
+#define NPCX_UMA_CTS_EXEC_DONE 7
+#define NPCX_UMA_ECTS_SW_CS0 0
+#define NPCX_UMA_ECTS_SW_CS1 1
+#define NPCX_UMA_ECTS_SEC_CS 2
+#define NPCX_UMA_ECTS_UMA_LOCK 3
+
+/* Flash UMA commands for npcx internal SPI flash */
+#define NPCX_CMD_READ_ID 0x9F
+#define NPCX_CMD_READ_MAN_DEV_ID 0x90
+#define NPCX_CMD_WRITE_EN 0x06
+#define NPCX_CMD_WRITE_STATUS 0x50
+#define NPCX_CMD_READ_STATUS_REG 0x05
+#define NPCX_CMD_READ_STATUS_REG2 0x35
+#define NPCX_CMD_WRITE_STATUS_REG 0x01
+#define NPCX_CMD_FLASH_PROGRAM 0x02
+#define NPCX_CMD_SECTOR_ERASE 0x20
+#define NPCX_CMD_PROGRAM_UINT_SIZE 0x08
+#define NPCX_CMD_PAGE_SIZE 0x00
+#define NPCX_CMD_READ_ID_TYPE 0x47
+#define NPCX_CMD_FAST_READ 0x0B
+#define NPCX_CMD_CHIP_ERASE 0xC7
+
+/*
+ * Status registers for SPI flash
+ */
+#define NPCX_SPI_FLASH_SR2_SUS (1 << 7)
+#define NPCX_SPI_FLASH_SR2_CMP (1 << 6)
+#define NPCX_SPI_FLASH_SR2_LB3 (1 << 5)
+#define NPCX_SPI_FLASH_SR2_LB2 (1 << 4)
+#define NPCX_SPI_FLASH_SR2_LB1 (1 << 3)
+#define NPCX_SPI_FLASH_SR2_QE (1 << 1)
+#define NPCX_SPI_FLASH_SR2_SRP1 (1 << 0)
+#define NPCX_SPI_FLASH_SR1_SRP0 (1 << 7)
+#define NPCX_SPI_FLASH_SR1_SEC (1 << 6)
+#define NPCX_SPI_FLASH_SR1_TB (1 << 5)
+#define NPCX_SPI_FLASH_SR1_BP2 (1 << 4)
+#define NPCX_SPI_FLASH_SR1_BP1 (1 << 3)
+#define NPCX_SPI_FLASH_SR1_BP0 (1 << 2)
+#define NPCX_SPI_FLASH_SR1_WEL (1 << 1)
+#define NPCX_SPI_FLASH_SR1_BUSY (1 << 0)
+
+#define NPCX_MASK_CMD_ONLY (0xC0)
+#define NPCX_MASK_CMD_ADR (0xC0 | 0x08)
+#define NPCX_MASK_CMD_ADR_WR (0xC0 | 0x20 | 0x08 | 0x01)
+#define NPCX_MASK_RD_1BYTE (0xC0 | 0x10 | 0x01)
+#define NPCX_MASK_RD_2BYTE (0xC0 | 0x10 | 0x02)
+#define NPCX_MASK_RD_3BYTE (0xC0 | 0x10 | 0x03)
+#define NPCX_MASK_RD_4BYTE (0xC0 | 0x10 | 0x04)
+#define NPCX_MASK_CMD_RD_1BYTE (0xC0 | 0x01)
+#define NPCX_MASK_CMD_RD_2BYTE (0xC0 | 0x02)
+#define NPCX_MASK_CMD_RD_3BYTE (0xC0 | 0x03)
+#define NPCX_MASK_CMD_RD_4BYTE (0xC0 | 0x04)
+#define NPCX_MASK_CMD_WR_ONLY (0xC0 | 0x20)
+#define NPCX_MASK_CMD_WR_1BYTE (0xC0 | 0x20 | 0x10 | 0x01)
+#define NPCX_MASK_CMD_WR_2BYTE (0xC0 | 0x20 | 0x10 | 0x02)
+#define NPCX_MASK_CMD_WR_ADR (0xC0 | 0x20 | 0x08)
+
+/* Flash loader parameters */
+struct __attribute__((__packed__)) npcx_flash_params {
+ uint32_t addr; /* Address in flash */
+ uint32_t len; /* Number of bytes */
+ uint32_t cmd; /* Command */
+ uint32_t sync; /* Handshake signal */
+};
+
+/* Flash trigger signal */
+enum npcx_flash_handshake {
+ NPCX_FLASH_LOADER_WAIT = 0x0, /* Idle */
+ NPCX_FLASH_LOADER_EXECUTE = 0xFFFFFFFF /* Execute Command */
+};
+
+/* Flash loader command */
+enum npcx_flash_commands {
+ NPCX_FLASH_CMD_NO_ACTION = 0, /* No action, default value */
+ NPCX_FLASH_CMD_GET_FLASH_ID, /* Get the internal flash ID */
+ NPCX_FLASH_CMD_ERASE_SECTORS, /* Erase unprotected sectors */
+ NPCX_FLASH_CMD_ERASE_ALL, /* Erase all */
+ NPCX_FLASH_CMD_PROGRAM, /* Program data */
+};
+
+/* Status */
+enum npcx_flash_status {
+ NPCX_FLASH_STATUS_OK = 0,
+ NPCX_FLASH_STATUS_FAILED_UNKNOWN_COMMAND,
+ NPCX_FLASH_STATUS_FAILED,
+ NPCX_FLASH_STATUS_FAILED_TIMEOUT,
+};
+
+#endif /* OPENOCD_LOADERS_FLASH_NPCX_NPCX_FLASH_H */
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