linux-imx

/*

 *  Copyright (C) 1996  Linus Torvalds & author (see below)

 */

​

#include <linux/module.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/timer.h>

#include <linux/mm.h>

#include <linux/ioport.h>

#include <linux/blkdev.h>

#include <linux/ide.h>

#include <linux/init.h>

​

#include <asm/io.h>

​

#define DRV_NAME "dtc2278"

​

/*

 * Changing this #undef to #define may solve start up problems in some systems.

 */

#undef ALWAYS_SET_DTC2278_PIO_MODE

​

/*

 * From: andy@cercle.cts.com (Dyan Wile)

 *

 * Below is a patch for DTC-2278 - alike software-programmable controllers

 * The code enables the secondary IDE controller and the PIO4 (3?) timings on

 * the primary (EIDE). You may probably have to enable the 32-bit support to

 * get the full speed. You better get the disk interrupts disabled ( hdparm -u0

 * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my

 * filesystem  corrupted with -u1, but under heavy disk load only :-)

 *

 * This card is now forced to use the "serialize" feature,

 * and irq-unmasking is disallowed.  If io_32bit is enabled,

 * it must be done for BOTH drives on each interface.

 *

 * This code was written for the DTC2278E, but might work with any of these:

 *

 * DTC2278S has only a single IDE interface.

 * DTC2278D has two IDE interfaces and is otherwise identical to the S version.

 * DTC2278E also has serial ports and a printer port

 * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>

 *

 * There may be a fourth controller type. The S and D versions use the

 * Winbond chip, and I think the E version does also.

 *

 */

​

static void sub22 (char b, char c)

{

    int i;

​

    for(i = 0; i < 3; ++i) {

        inb(0x3f6);

        outb_p(b,0xb0);

        inb(0x3f6);

        outb_p(c,0xb4);

        inb(0x3f6);

        if(inb(0xb4) == c) {

            outb_p(7,0xb0);

            inb(0x3f6);