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linux-sg2042/drivers/ide/qd65xx.c

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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_dev_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));
outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
}
/*
* 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)
{
unsigned long data = (unsigned long)ide_get_drivedata(drive);
data &= 0xff00;
data |= timing;
ide_set_drivedata(drive, (void *)data);
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");
printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
printk(KERN_ERR "Assuming qd65xx is not present.\n");
return 1;
}
return (readreg != QD_TESTVAL);
}
static void __init qd6500_init_dev(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 base = (hwif->config_data & 0xff00) >> 8;
u8 config = QD_CONFIG(hwif);
ide_set_drivedata(drive, (void *)QD6500_DEF_DATA);
}
static void __init qd6580_init_dev(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u16 t1, t2;
u8 base = (hwif->config_data & 0xff00) >> 8;
u8 config = QD_CONFIG(hwif);
if (hwif->host_flags & IDE_HFLAG_SINGLE) {
t1 = QD6580_DEF_DATA;
t2 = QD6580_DEF_DATA2;
} else
t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
ide_set_drivedata(drive, (void *)((drive->dn & 1) ? t2 : t1));
}
static const struct ide_tp_ops qd65xx_tp_ops = {
.exec_command = ide_exec_command,
.read_status = ide_read_status,
.read_altstatus = ide_read_altstatus,
.write_devctl = ide_write_devctl,
.dev_select = qd65xx_dev_select,
.tf_load = ide_tf_load,
.tf_read = ide_tf_read,
.input_data = ide_input_data,
.output_data = ide_output_data,
};
static const struct ide_port_ops qd6500_port_ops = {
.init_dev = qd6500_init_dev,
.set_pio_mode = qd6500_set_pio_mode,
};
static const struct ide_port_ops qd6580_port_ops = {
.init_dev = qd6580_init_dev,
.set_pio_mode = qd6580_set_pio_mode,
};
static const struct ide_port_info qd65xx_port_info __initdata = {
.name = DRV_NAME,
.tp_ops = &qd65xx_tp_ops,
.chipset = ide_qd65xx,
.host_flags = IDE_HFLAG_IO_32BIT |
IDE_HFLAG_NO_DMA,
.pio_mask = ATA_PIO4,
};
/*
* qd_probe:
*
* looks at the specified baseport, and if qd found, registers & initialises it
* return 1 if another qd may be probed
*/
static int __init qd_probe(int base)
{
int rc;
u8 config, unit, control;
struct ide_port_info d = qd65xx_port_info;
config = inb(QD_CONFIG_PORT);
if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
return -ENODEV;
unit = ! (config & QD_CONFIG_IDE_BASEPORT);
if (unit)
d.host_flags |= IDE_HFLAG_QD_2ND_PORT;
switch (config & 0xf0) {
case QD_CONFIG_QD6500:
if (qd_testreg(base))
return -ENODEV; /* bad register */
if (config & QD_CONFIG_DISABLED) {
printk(KERN_WARNING "qd6500 is disabled !\n");
return -ENODEV;
}
printk(KERN_NOTICE "qd6500 at %#x\n", base);
printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
config, QD_ID3);
d.port_ops = &qd6500_port_ops;
d.host_flags |= IDE_HFLAG_SINGLE;
break;
case QD_CONFIG_QD6580_A:
case QD_CONFIG_QD6580_B:
if (qd_testreg(base) || qd_testreg(base + 0x02))
return -ENODEV; /* bad registers */
control = inb(QD_CONTROL_PORT);
printk(KERN_NOTICE "qd6580 at %#x\n", base);
printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
config, control, QD_ID3);
outb(QD_DEF_CONTR, QD_CONTROL_PORT);
d.port_ops = &qd6580_port_ops;
if (control & QD_CONTR_SEC_DISABLED)
d.host_flags |= IDE_HFLAG_SINGLE;
printk(KERN_INFO "qd6580: %s IDE board\n",
(control & QD_CONTR_SEC_DISABLED) ? "single" : "dual");
break;
default:
return -ENODEV;
}
rc = ide_legacy_device_add(&d, (base << 8) | config);
if (d.host_flags & IDE_HFLAG_SINGLE)
return (rc == 0) ? 1 : rc;
return rc;
}
static int probe_qd65xx;
module_param_named(probe, probe_qd65xx, bool, 0);
MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
static int __init qd65xx_init(void)
{
int rc1, rc2 = -ENODEV;
if (probe_qd65xx == 0)
return -ENODEV;
rc1 = qd_probe(0x30);
if (rc1)
rc2 = qd_probe(0xb0);
if (rc1 < 0 && rc2 < 0)
return -ENODEV;
return 0;
}
module_init(qd65xx_init);
MODULE_AUTHOR("Samuel Thibault");
MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
MODULE_LICENSE("GPL");
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