linux-imx

/*

 * OMAP7xx SPI 100k controller driver

 * Author: Fabrice Crohas <fcrohas@gmail.com>

 * from original omap1_mcspi driver

 *

 * Copyright (C) 2005, 2006 Nokia Corporation

 * Author:      Samuel Ortiz <samuel.ortiz@nokia.com> and

 *              Juha Yrj�l� <juha.yrjola@nokia.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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 */

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/device.h>

#include <linux/delay.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/err.h>

#include <linux/clk.h>

#include <linux/io.h>

#include <linux/gpio.h>

#include <linux/slab.h>

​

#include <linux/spi/spi.h>

​

#define OMAP1_SPI100K_MAX_FREQ          48000000

​

#define ICR_SPITAS      (OMAP7XX_ICR_BASE + 0x12)

​

#define SPI_SETUP1      0x00

#define SPI_SETUP2      0x02

#define SPI_CTRL        0x04

#define SPI_STATUS      0x06

#define SPI_TX_LSB      0x08

#define SPI_TX_MSB      0x0a

#define SPI_RX_LSB      0x0c

#define SPI_RX_MSB      0x0e

​

#define SPI_SETUP1_INT_READ_ENABLE      (1UL << 5)

#define SPI_SETUP1_INT_WRITE_ENABLE     (1UL << 4)

#define SPI_SETUP1_CLOCK_DIVISOR(x)     ((x) << 1)

#define SPI_SETUP1_CLOCK_ENABLE         (1UL << 0)

​

#define SPI_SETUP2_ACTIVE_EDGE_FALLING  (0UL << 0)

#define SPI_SETUP2_ACTIVE_EDGE_RISING   (1UL << 0)

#define SPI_SETUP2_NEGATIVE_LEVEL       (0UL << 5)

#define SPI_SETUP2_POSITIVE_LEVEL       (1UL << 5)

#define SPI_SETUP2_LEVEL_TRIGGER        (0UL << 10)

#define SPI_SETUP2_EDGE_TRIGGER         (1UL << 10)

​

#define SPI_CTRL_SEN(x)                 ((x) << 7)

#define SPI_CTRL_WORD_SIZE(x)           (((x) - 1) << 2)

#define SPI_CTRL_WR                     (1UL << 1)