linux-imx

/*

 *  Copyright (C) 1996-2001  Linus Torvalds & author (see below)

 */

​

/*

 *  Version 0.03    Cleaned auto-tune, added probe

 *  Version 0.04    Added second channel tuning

 *  Version 0.05    Enhanced tuning ; added qd6500 support

 *  Version 0.06    Added dos driver's list

 *  Version 0.07    Second channel bug fix 

 *

 * QDI QD6500/QD6580 EIDE controller fast support

 *

 * To activate controller support, use "ide0=qd65xx"

 */

​

/*

 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by

 * Samuel Thibault <samuel.thibault@ens-lyon.org>

 */

​

#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 "qd65xx"

​

#include "qd65xx.h"

​

/*

 * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)

 *            or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)

 *  -- qd6500 is a single IDE interface

 *  -- qd6580 is a dual IDE interface

 *

 * More research on qd6580 being done by willmore@cig.mot.com (David)

 * More Information given by Petr Soucek (petr@ryston.cz)

 * http://www.ryston.cz/petr/vlb

 */

​

/*

 * base: Timer1

 *

 *

 * base+0x01: Config (R/O)

 *

 * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)

 * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30

 * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz

 * bit 3: qd6500: 1 = disabled, 0 = enabled

 *        qd6580: 1

 * upper nibble:

 *        qd6500: 1100

 *        qd6580: either 1010 or 0101

 *

 *

 * base+0x02: Timer2 (qd6580 only)

 *

 *

 * base+0x03: Control (qd6580 only)

 *

 * bits 0-3 must always be set 1

 * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock

 * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb

 *         0 = Primary and Secondary ports enabled : channel 0 for hda & hdb

 *                                                   channel 1 for hdc & hdd

 * bit 1 : 1 = only disks on primary port

 *         0 = disks & ATAPI devices on primary port

 * bit 2-4 : always 0

 * bit 5 : status, but of what ?

 * bit 6 : always set 1 by dos driver

 * bit 7 : set 1 for non-ATAPI devices on primary port

 *  (maybe read-ahead and post-write buffer ?)

 */

​

static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */

​

/*

 * qd65xx_select:

 *

 * This routine is invoked to prepare for access to a given drive.

 */

​

static void qd65xx_dev_select(ide_drive_t *drive)