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