linux-imx

/*

 *  Copyright (C) 1996-1998  Linus Torvalds & authors (see below)

 */

​

/*

 * Authors:

 * Jaromir Koutek <miri@punknet.cz>,

 * Jan Harkes <jaharkes@cwi.nl>,

 * Mark Lord <mlord@pobox.com>

 * Some parts of code are from ali14xx.c and from rz1000.c.

 */

​

#include <linux/types.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/pci.h>

#include <linux/ide.h>

​

#include <asm/io.h>

​

#define DRV_NAME "opti621"

​

#define READ_REG 0  /* index of Read cycle timing register */

#define WRITE_REG 1 /* index of Write cycle timing register */

#define CNTRL_REG 3 /* index of Control register */

#define STRAP_REG 5 /* index of Strap register */

#define MISC_REG 6  /* index of Miscellaneous register */

​

static int reg_base;

​

static DEFINE_SPINLOCK(opti621_lock);

​

/* Write value to register reg, base of register

 * is at reg_base (0x1f0 primary, 0x170 secondary,

 * if not changed by PCI configuration).

 * This is from setupvic.exe program.

 */

static void write_reg(u8 value, int reg)

{

    inw(reg_base + 1);

    inw(reg_base + 1);

    outb(3, reg_base + 2);

    outb(value, reg_base + reg);

    outb(0x83, reg_base + 2);

}

​

/* Read value from register reg, base of register

 * is at reg_base (0x1f0 primary, 0x170 secondary,

 * if not changed by PCI configuration).

 * This is from setupvic.exe program.

 */

static u8 read_reg(int reg)

{

    u8 ret = 0;

​

    inw(reg_base + 1);

    inw(reg_base + 1);

    outb(3, reg_base + 2);

    ret = inb(reg_base + reg);

    outb(0x83, reg_base + 2);

​

    return ret;

}