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/*
* 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/system.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_select(ide_drive_t *drive)
{
u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
(QD_TIMREG(drive) & 0x02);
if (timings[index] != QD_TIMING(drive))
outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
}
/*
* qd6500_compute_timing
*
* computes the timing value where
* lower nibble represents active time, in count of VLB clocks
* upper nibble represents recovery time, in count of VLB clocks
*/
static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
{
int clk = ide_vlb_clk ? ide_vlb_clk : 50;
u8 act_cyc, rec_cyc;
if (clk <= 33) {
act_cyc = 9 - IDE_IN(active_time * clk / 1000 + 1, 2, 9);
rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
} else {
act_cyc = 8 - IDE_IN(active_time * clk / 1000 + 1, 1, 8);
rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
}
return (rec_cyc << 4) | 0x08 | act_cyc;
}
/*
* qd6580_compute_timing
*
* idem for qd6580
*/
static u8 qd6580_compute_timing (int active_time, int recovery_time)
{
int clk = ide_vlb_clk ? ide_vlb_clk : 50;
u8 act_cyc, rec_cyc;
act_cyc = 17 - IDE_IN(active_time * clk / 1000 + 1, 2, 17);
rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
return (rec_cyc << 4) | act_cyc;
}
/*
* qd_find_disk_type
*
* tries to find timing from dos driver's table
*/
static int qd_find_disk_type (ide_drive_t *drive,
int *active_time, int *recovery_time)
{
struct qd65xx_timing_s *p;
char *m = (char *)&drive->id[ATA_ID_PROD];
char model[ATA_ID_PROD_LEN];
if (*m == 0)
return 0;
strncpy(model, m, ATA_ID_PROD_LEN);
ide_fixstring(model, ATA_ID_PROD_LEN, 1); /* byte-swap */
for (p = qd65xx_timing ; p->offset != -1 ; p++) {
if (!strncmp(p->model, model+p->offset, 4)) {
printk(KERN_DEBUG "%s: listed !\n", drive->name);
*active_time = p->active;
*recovery_time = p->recovery;
return 1;
}
}
return 0;
}
/*
* qd_set_timing:
*
* records the timing
*/
static void qd_set_timing (ide_drive_t *drive, u8 timing)
{
drive->drive_data &= 0xff00;
drive->drive_data |= timing;
printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
}
static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
u16 *id = drive->id;
int active_time = 175;
int recovery_time = 415; /* worst case values from the dos driver */
/*
* FIXME: use "pio" value
*/
if (!qd_find_disk_type(drive, &active_time, &recovery_time) &&
(id[ATA_ID_OLD_PIO_MODES] & 0xff) && (id[ATA_ID_FIELD_VALID] & 2) &&
id[ATA_ID_EIDE_PIO] >= 240) {
printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
id[ATA_ID_OLD_PIO_MODES] & 0xff);
active_time = 110;
recovery_time = drive->id[ATA_ID_EIDE_PIO] - 120;
}
qd_set_timing(drive, qd6500_compute_timing(drive->hwif,
active_time, recovery_time));
}
static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
ide_hwif_t *hwif = drive->hwif;
struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
unsigned int cycle_time;
int active_time = 175;
int recovery_time = 415; /* worst case values from the dos driver */
u8 base = (hwif->config_data & 0xff00) >> 8;
if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
cycle_time = ide_pio_cycle_time(drive, pio);
switch (pio) {
case 0: break;
case 3:
if (cycle_time >= 110) {
active_time = 86;
recovery_time = cycle_time - 102;
} else
printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
break;
case 4:
if (cycle_time >= 69) {
active_time = 70;
recovery_time = cycle_time - 61;
} else
printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
break;
default:
if (cycle_time >= 180) {
active_time = 110;
recovery_time = cycle_time - 120;
} else {
active_time = t->active;
recovery_time = cycle_time - active_time;
}
}
printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
}
if (!hwif->channel && drive->media != ide_disk) {
outb(0x5f, QD_CONTROL_PORT);
printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
"and post-write buffer on %s.\n",
drive->name, hwif->name);
}
qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
}
/*
* qd_testreg
*
* tests if the given port is a register
*/
static int __init qd_testreg(int port)
{
unsigned long flags;
u8 savereg, readreg;
local_irq_save(flags);
savereg = inb_p(port);
outb_p(QD_TESTVAL, port); /* safe value */
readreg = inb_p(port);
outb(savereg, port);
local_irq_restore(flags);
if (savereg == QD_TESTVAL) {
printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n
|