include/linux/mtd/st_smi.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2009
 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
 */

#ifndef ST_SMI_H
#define ST_SMI_H

/* 0xF800.0000 . 0xFBFF.FFFF	64MB	SMI (Serial Flash Mem) */
/* 0xFC00.0000 . 0xFC1F.FFFF	2MB	SMI (Serial Flash Reg.) */

#define FLASH_START_ADDRESS	CONFIG_SYS_FLASH_BASE
#define FLASH_BANK_SIZE		CONFIG_SYS_FLASH_BANK_SIZE

#define SMIBANK0_BASE		(FLASH_START_ADDRESS)
#define SMIBANK1_BASE		(SMIBANK0_BASE + FLASH_BANK_SIZE)
#define SMIBANK2_BASE		(SMIBANK1_BASE + FLASH_BANK_SIZE)
#define SMIBANK3_BASE		(SMIBANK2_BASE + FLASH_BANK_SIZE)

#define BANK0			0
#define BANK1			1
#define BANK2			2
#define BANK3			3

struct smi_regs {
	u32 smi_cr1;
	u32 smi_cr2;
	u32 smi_sr;
	u32 smi_tr;
	u32 smi_rr;
};

/* CONTROL REG 1 */
#define BANK_EN			0x0000000F	/* enables all banks */
#define DSEL_TIME		0x00000060	/* Deselect time */
#define PRESCAL5		0x00000500	/* AHB_CK prescaling value */
#define PRESCALA		0x00000A00	/* AHB_CK prescaling value */
#define PRESCAL3		0x00000300	/* AHB_CK prescaling value */
#define PRESCAL4		0x00000400	/* AHB_CK prescaling value */
#define SW_MODE			0x10000000	/* enables SW Mode */
#define WB_MODE			0x20000000	/* Write Burst Mode */
#define FAST_MODE		0x00008000	/* Fast Mode */
#define HOLD1			0x00010000

/* CONTROL REG 2 */
#define RD_STATUS_REG		0x00000400	/* reads status reg */
#define WE			0x00000800	/* Write Enable */
#define BANK0_SEL		0x00000000	/* Select Banck0 */
#define BANK1_SEL		0x00001000	/* Select Banck1 */
#define BANK2_SEL		0x00002000	/* Select Banck2 */
#define BANK3_SEL		0x00003000	/* Select Banck3 */
#define BANKSEL_SHIFT		12
#define SEND			0x00000080	/* Send data */
#define TX_LEN_1		0x00000001	/* data length = 1 byte */
#define TX_LEN_2		0x00000002	/* data length = 2 byte */
#define TX_LEN_3		0x00000003	/* data length = 3 byte */
#define TX_LEN_4		0x00000004	/* data length = 4 byte */
#define RX_LEN_1		0x00000010	/* data length = 1 byte */
#define RX_LEN_2		0x00000020	/* data length = 2 byte */
#define RX_LEN_3		0x00000030	/* data length = 3 byte */
#define RX_LEN_4		0x00000040	/* data length = 4 byte */
#define TFIE			0x00000100	/* Tx Flag Interrupt Enable */
#define WCIE			0x00000200	/* WCF Interrupt Enable */

/* STATUS_REG */
#define INT_WCF_CLR		0xFFFFFDFF	/* clear: WCF clear */
#define INT_TFF_CLR		0xFFFFFEFF	/* clear: TFF clear */
#define WIP_BIT			0x00000001	/* WIP Bit of SPI SR */
#define WEL_BIT			0x00000002	/* WEL Bit of SPI SR */
#define RSR			0x00000005	/* Read Status regiser */
#define TFF			0x00000100	/* Transfer Finished FLag */
#define WCF			0x00000200	/* Transfer Finished FLag */
#define ERF1			0x00000400	/* Error Flag 1 */
#define ERF2			0x00000800	/* Error Flag 2 */
#define WM0			0x00001000	/* WM Bank 0 */
#define WM1			0x00002000	/* WM Bank 1 */
#define WM2			0x00004000	/* WM Bank 2 */
#define WM3			0x00008000	/* WM Bank 3 */
#define WM_SHIFT		12

/* TR REG */
#define READ_ID			0x0000009F	/* Read Identification */
#define BULK_ERASE		0x000000C7	/* BULK erase */
#define SECTOR_ERASE		0x000000D8	/* SECTOR erase */
#define WRITE_ENABLE		0x00000006	/* Wenable command to FLASH */

struct flash_dev {
	u32 density;
	ulong size;
	ushort sector_count;
};

#define SFLASH_PAGE_SIZE	0x100	/* flash page size */
#define XFER_FINISH_TOUT	15	/* xfer finish timeout(in ms) */
#define WMODE_TOUT		15	/* write enable timeout(in ms) */

extern void smi_init(void);

#endif