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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef CPU_SAMSUNG_EXYNOS5250_SPI_H
#define CPU_SAMSUNG_EXYNOS5250_SPI_H
#include <boot_device.h>
/* SPI peripheral register map; padded to 64KB */
struct exynos_spi {
unsigned int ch_cfg; /* 0x00 */
unsigned char reserved0[4];
unsigned int mode_cfg; /* 0x08 */
unsigned int cs_reg; /* 0x0c */
unsigned char reserved1[4];
unsigned int spi_sts; /* 0x14 */
unsigned int tx_data; /* 0x18 */
unsigned int rx_data; /* 0x1c */
unsigned int pkt_cnt; /* 0x20 */
unsigned char reserved2[4];
unsigned int swap_cfg; /* 0x28 */
unsigned int fb_clk; /* 0x2c */
unsigned char padding[0xffd0];
};
check_member(exynos_spi, fb_clk, 0x2c);
#define EXYNOS_SPI_MAX_FREQ 50000000
#define SPI_TIMEOUT_MS 10
#define SF_READ_DATA_CMD 0x3
/* SPI_CHCFG */
#define SPI_CH_HS_EN (1 << 6)
#define SPI_CH_RST (1 << 5)
#define SPI_SLAVE_MODE (1 << 4)
#define SPI_CH_CPOL_L (1 << 3)
#define SPI_CH_CPHA_B (1 << 2)
#define SPI_RX_CH_ON (1 << 1)
#define SPI_TX_CH_ON (1 << 0)
/* SPI_MODECFG */
#define SPI_MODE_CH_WIDTH_WORD (0x2 << 29)
#define SPI_MODE_BUS_WIDTH_WORD (0x2 << 17)
/* SPI_CSREG */
#define SPI_SLAVE_SIG_INACT (1 << 0)
/* SPI_STS */
#define SPI_ST_TX_DONE (1 << 25)
#define SPI_FIFO_LVL_MASK 0x1ff
#define SPI_TX_LVL_OFFSET 6
#define SPI_RX_LVL_OFFSET 15
/* Feedback Delay */
#define SPI_CLK_BYPASS (0 << 0)
#define SPI_FB_DELAY_90 (1 << 0)
#define SPI_FB_DELAY_180 (2 << 0)
#define SPI_FB_DELAY_270 (3 << 0)
/* Packet Count */
#define SPI_PACKET_CNT_EN (1 << 16)
/* Swap config */
#define SPI_TX_SWAP_EN (1 << 0)
#define SPI_TX_BYTE_SWAP (1 << 2)
#define SPI_TX_HWORD_SWAP (1 << 3)
#define SPI_TX_BYTE_SWAP (1 << 2)
#define SPI_RX_SWAP_EN (1 << 4)
#define SPI_RX_BYTE_SWAP (1 << 6)
#define SPI_RX_HWORD_SWAP (1 << 7)
/* API */
int exynos_spi_open(struct exynos_spi *regs);
int exynos_spi_read(struct exynos_spi *regs, void *dest, u32 len, u32 off);
int exynos_spi_close(struct exynos_spi *regs);
void exynos_init_spi_boot_device(void);
const struct region_device *exynos_spi_boot_device(void);
#endif
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