1. 根目录:
2. drivers
3. spi
4. spi-fsl-spi.h

/*
 * Freescale SPI controller driver.
 *
 * Maintainer: Kumar Gala
 *
 * Copyright (C) 2006 Polycom, Inc.
 * Copyright 2010 Freescale Semiconductor, Inc.
 *
 * CPM SPI and QE buffer descriptors mode support:
 * Copyright (c) 2009  MontaVista Software, Inc.
 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * GRLIB support:
 * Copyright (c) 2012 Aeroflex Gaisler AB.
 * Author: Andreas Larsson <andreas@gaisler.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#ifndef __SPI_FSL_SPI_H__
#define __SPI_FSL_SPI_H__

/* SPI Controller registers */
struct fsl_spi_reg {
	__be32 cap; /* TYPE_GRLIB specific */
	u8 res1[0x1C];
	__be32 mode;
	__be32 event;
	__be32 mask;
	__be32 command;
	__be32 transmit;
	__be32 receive;
	__be32 slvsel; /* TYPE_GRLIB specific */
};

/* SPI Controller mode register definitions */
#define	SPMODE_LOOP		(1 << 30)
#define	SPMODE_CI_INACTIVEHIGH	(1 << 29)
#define	SPMODE_CP_BEGIN_EDGECLK	(1 << 28)
#define	SPMODE_DIV16		(1 << 27)
#define	SPMODE_REV		(1 << 26)
#define	SPMODE_MS		(1 << 25)
#define	SPMODE_ENABLE		(1 << 24)
#define	SPMODE_LEN(x)		((x) << 20)
#define	SPMODE_PM(x)		((x) << 16)
#define	SPMODE_OP		(1 << 14)
#define	SPMODE_CG(x)		((x) << 7)

/* TYPE_GRLIB SPI Controller capability register definitions */
#define SPCAP_SSEN(x)		(((x) >> 16) & 0x1)
#define SPCAP_SSSZ(x)		(((x) >> 24) & 0xff)
#define SPCAP_MAXWLEN(x)	(((x) >> 20) & 0xf)

/*
 * Default for SPI Mode:
 *	SPI MODE 0 (inactive low, phase middle, MSB, 8-bit length, slow clk
 */
#define	SPMODE_INIT_VAL (SPMODE_CI_INACTIVEHIGH | SPMODE_DIV16 | SPMODE_REV | \
			 SPMODE_MS | SPMODE_LEN(7) | SPMODE_PM(0xf))

/* SPIE register values */
#define	SPIE_NE		0x00000200	/* Not empty */
#define	SPIE_NF		0x00000100	/* Not full */

/* SPIM register values */
#define	SPIM_NE		0x00000200	/* Not empty */
#define	SPIM_NF		0x00000100	/* Not full */

#endif /* __SPI_FSL_SPI_H__ */