linux-imx

/*

 * TXx9 SPI controller driver.

 *

 * Based on linux/arch/mips/tx4938/toshiba_rbtx4938/spi_txx9.c

 * Copyright (C) 2000-2001 Toshiba Corporation

 *

 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the

 * terms of the GNU General Public License version 2. This program is

 * licensed "as is" without any warranty of any kind, whether express

 * or implied.

 *

 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)

 *

 * Convert to generic SPI framework - Atsushi Nemoto (anemo@mba.ocn.ne.jp)

 */

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/errno.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>

#include <linux/sched.h>

#include <linux/spinlock.h>

#include <linux/workqueue.h>

#include <linux/spi/spi.h>

#include <linux/err.h>

#include <linux/clk.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/gpio.h>

​

​

#define SPI_FIFO_SIZE 4

#define SPI_MAX_DIVIDER 0xff    /* Max. value for SPCR1.SER */

#define SPI_MIN_DIVIDER 1   /* Min. value for SPCR1.SER */

​

#define TXx9_SPMCR      0x00

#define TXx9_SPCR0      0x04

#define TXx9_SPCR1      0x08

#define TXx9_SPFS       0x0c

#define TXx9_SPSR       0x14

#define TXx9_SPDR       0x18

​

/* SPMCR : SPI Master Control */

#define TXx9_SPMCR_OPMODE   0xc0

#define TXx9_SPMCR_CONFIG   0x40

#define TXx9_SPMCR_ACTIVE   0x80

#define TXx9_SPMCR_SPSTP    0x02

#define TXx9_SPMCR_BCLR     0x01

​

/* SPCR0 : SPI Control 0 */

#define TXx9_SPCR0_TXIFL_MASK   0xc000

#define TXx9_SPCR0_RXIFL_MASK   0x3000

#define TXx9_SPCR0_SIDIE    0x0800

#define TXx9_SPCR0_SOEIE    0x0400

#define TXx9_SPCR0_RBSIE    0x0200

#define TXx9_SPCR0_TBSIE    0x0100

#define TXx9_SPCR0_IFSPSE   0x0010

#define TXx9_SPCR0_SBOS     0x0004

#define TXx9_SPCR0_SPHA     0x0002

#define TXx9_SPCR0_SPOL     0x0001

​

/* SPSR : SPI Status */

#define TXx9_SPSR_TBSI      0x8000