linux-imx

/*

 *  Copyright (C) 1995-1996  Linus Torvalds & author (see below)

 */

​

/*

 *  Principal Author/Maintainer:  PODIEN@hml2.atlas.de (Wolfram Podien)

 *

 *  This file provides support for the advanced features

 *  of the UMC 8672 IDE interface.

 *

 *  Version 0.01    Initial version, hacked out of ide.c,

 *          and #include'd rather than compiled separately.

 *          This will get cleaned up in a subsequent release.

 *

 *  Version 0.02    now configs/compiles separate from ide.c  -ml

 *  Version 0.03    enhanced auto-tune, fix display bug

 *  Version 0.05    replace sti() with restore_flags()  -ml

 *          add detection of possible race condition  -ml

 */

​

/*

 * VLB Controller Support from

 * Wolfram Podien

 * Rohoefe 3

 * D28832 Achim

 * Germany

 *

 * To enable UMC8672 support there must a lilo line like

 * append="ide0=umc8672"...

 * To set the speed according to the abilities of the hardware there must be a

 * line like

 * #define UMC_DRIVE0 11

 * in the beginning of the driver, which sets the speed of drive 0 to 11 (there

 * are some lines present). 0 - 11 are allowed speed values. These values are

 * the results from the DOS speed test program supplied from UMC. 11 is the

 * highest speed (about PIO mode 3)

 */

#define REALLY_SLOW_IO      /* some systems can safely undef this */

​

#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 "umc8672"

​

/*

 * Default speeds.  These can be changed with "auto-tune" and/or hdparm.

 */

#define UMC_DRIVE0      1              /* DOS measured drive speeds */

#define UMC_DRIVE1      1              /* 0 to 11 allowed */

#define UMC_DRIVE2      1              /* 11 = Fastest Speed */

#define UMC_DRIVE3      1              /* In case of crash reduce speed */

​

static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};