linux-imx

/*

 *  Copyright (C) 1995-2000  Linus Torvalds & author (see below)

 */

​

/*

 *  HT-6560B EIDE-controller support

 *  To activate controller support use kernel parameter "ide0=ht6560b".

 *  Use hdparm utility to enable PIO mode support.

 *

 *  Author:    Mikko Ala-Fossi            <maf@iki.fi>

 *             Jan Evert van Grootheest   <j.e.van.grootheest@caiway.nl>

 *

 */

​

#define DRV_NAME    "ht6560b"

#define HT6560B_VERSION "v0.08"

​

#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 DEBUG */  /* remove comments for DEBUG messages */

​

/*

 * The special i/o-port that HT-6560B uses to configuration:

 *    bit0 (0x01): "1" selects secondary interface

 *    bit2 (0x04): "1" enables FIFO function

 *    bit5 (0x20): "1" enables prefetched data read function  (???)

 *

 * The special i/o-port that HT-6560A uses to configuration:

 *    bit0 (0x01): "1" selects secondary interface

 *    bit1 (0x02): "1" enables prefetched data read function

 *    bit2 (0x04): "0" enables multi-master system        (?)

 *    bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time         (?)

 */

#define HT_CONFIG_PORT    0x3e6

​

static inline u8 HT_CONFIG(ide_drive_t *drive)

{

    return ((unsigned long)ide_get_drivedata(drive) & 0xff00) >> 8;

}

​

/*

 * FIFO + PREFETCH (both a/b-model)

 */

#define HT_CONFIG_DEFAULT 0x1c /* no prefetch */

/* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */

#define HT_SECONDARY_IF   0x01

#define HT_PREFETCH_MODE  0x20

​

/*

 * ht6560b Timing values:

 *

 * I reviewed some assembler source listings of htide drivers and found