arch/arm/include/asm/arch-mvebu/spi.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2009
 * Marvell Semiconductor <www.marvell.com>
 * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
 *
 * Derived from drivers/spi/mpc8xxx_spi.c
 */

#ifndef __KW_SPI_H__
#define __KW_SPI_H__

/* SPI Registers on kirkwood SOC */
struct kwspi_registers {
	u32 ctrl;	/* 0x10600 */
	u32 cfg;	/* 0x10604 */
	u32 dout;	/* 0x10608 */
	u32 din;	/* 0x1060c */
	u32 irq_cause;	/* 0x10610 */
	u32 irq_mask;	/* 0x10614 */
	u32 timing1;	/* 0x10618 */
	u32 timing2;	/* 0x1061c */
	u32 dw_cfg;	/* 0x10620 - Direct Write Configuration */
};

/* They are used to define CONFIG_SYS_KW_SPI_MPP
 * each of the below #defines selects which mpp is
 * configured for each SPI signal in spi_claim_bus
 * bit 0: selects pin for MOSI (MPP1 if 0, MPP6 if 1)
 * bit 1: selects pin for SCK (MPP2 if 0, MPP10 if 1)
 * bit 2: selects pin for MISO (MPP3 if 0, MPP11 if 1)
 */
#define MOSI_MPP6	(1 << 0)
#define SCK_MPP10	(1 << 1)
#define MISO_MPP11	(1 << 2)

/* Control Register */
#define KWSPI_CSN_ACT		(1 << 0) /* Activates serial memory interface */
#define KWSPI_SMEMRDY		(1 << 1) /* SerMem Data xfer ready */
#define KWSPI_CS_SHIFT		2	/* chip select shift */
#define KWSPI_CS_MASK		0x7	/* chip select mask */

/* Configuration Register */
#define KWSPI_CLKPRESCL_MASK	0x1f
#define KWSPI_CLKPRESCL_MIN	0x12
#define KWSPI_XFERLEN_1BYTE	0
#define KWSPI_XFERLEN_2BYTE	(1 << 5)
#define KWSPI_XFERLEN_MASK	(1 << 5)
#define KWSPI_ADRLEN_1BYTE	0
#define KWSPI_ADRLEN_2BYTE	(1 << 8)
#define KWSPI_ADRLEN_3BYTE	(2 << 8)
#define KWSPI_ADRLEN_4BYTE	(3 << 8)
#define KWSPI_ADRLEN_MASK	(3 << 8)
#define KWSPI_CPOL		(1 << 11)
#define KWSPI_CPHA		(1 << 12)
#define KWSPI_TXLSBF		(1 << 13)
#define KWSPI_RXLSBF		(1 << 14)

/* Timing Parameters 1 Register */
#define KW_SPI_TMISO_SAMPLE_OFFSET	6
#define KW_SPI_TMISO_SAMPLE_MASK	(0x3 << KW_SPI_TMISO_SAMPLE_OFFSET)
#define KW_SPI_TMISO_SAMPLE_1		(1 << KW_SPI_TMISO_SAMPLE_OFFSET)
#define KW_SPI_TMISO_SAMPLE_2		(2 << KW_SPI_TMISO_SAMPLE_OFFSET)

#define KWSPI_IRQUNMASK		1 /* unmask SPI interrupt */
#define KWSPI_IRQMASK		0 /* mask SPI interrupt */
#define KWSPI_SMEMRDIRQ		1 /* SerMem data xfer ready irq */

#define KWSPI_TIMEOUT		10000

#endif /* __KW_SPI_H__ */