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linux-next/drivers/ide/legacy/umc8672.c
Bartlomiej Zolnierkiewicz 849138827c ide: make legacy IDE VLB modules check for the "probe" kernel params (v2)
Legacy IDE VLB host drivers didn't check for "probe" options when compiled
as modules, which was obviously wrong as we don't want module to poke at
random I/O ports by simply loading it.  Fix it by adding "probe" module param
to legacy IDE VLB host drivers.

v2:
* don't obsolete old "ide0=dtc2278/ht6560b/qd65xx/ali14xx/umc8672"
  IDE driver options yet (per Alan Cox's request) and enhance documentation

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-03-03 17:48:55 +01:00

192 lines
5.0 KiB
C

/*
* linux/drivers/ide/legacy/umc8672.c Version 0.05 Jul 31, 1996
*
* 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/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/io.h>
/*
* 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};
static const u8 pio_to_umc [5] = {0,3,7,10,11}; /* rough guesses */
/* 0 1 2 3 4 5 6 7 8 9 10 11 */
static const u8 speedtab [3][12] = {
{0xf, 0xb, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
{0x3, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 },
{0xff,0xcb,0xc0,0x58,0x36,0x33,0x23,0x22,0x21,0x11,0x10,0x0}};
static void out_umc (char port,char wert)
{
outb_p(port,0x108);
outb_p(wert,0x109);
}
static inline u8 in_umc (char port)
{
outb_p(port,0x108);
return inb_p(0x109);
}
static void umc_set_speeds (u8 speeds[])
{
int i, tmp;
outb_p(0x5A,0x108); /* enable umc */
out_umc (0xd7,(speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4)));
out_umc (0xd6,(speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4)));
tmp = 0;
for (i = 3; i >= 0; i--) {
tmp = (tmp << 2) | speedtab[1][speeds[i]];
}
out_umc (0xdc,tmp);
for (i = 0;i < 4; i++) {
out_umc (0xd0+i,speedtab[2][speeds[i]]);
out_umc (0xd8+i,speedtab[2][speeds[i]]);
}
outb_p(0xa5,0x108); /* disable umc */
printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
speeds[0], speeds[1], speeds[2], speeds[3]);
}
static void tune_umc (ide_drive_t *drive, u8 pio)
{
unsigned long flags;
ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup;
pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
drive->name, pio, pio_to_umc[pio]);
spin_lock_irqsave(&ide_lock, flags);
if (hwgroup && hwgroup->handler != NULL) {
printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
} else {
current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
umc_set_speeds (current_speeds);
}
spin_unlock_irqrestore(&ide_lock, flags);
}
static int __init umc8672_probe(void)
{
unsigned long flags;
ide_hwif_t *hwif, *mate;
if (!request_region(0x108, 2, "umc8672")) {
printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
return 1;
}
local_irq_save(flags);
outb_p(0x5A,0x108); /* enable umc */
if (in_umc (0xd5) != 0xa0) {
local_irq_restore(flags);
printk(KERN_ERR "umc8672: not found\n");
release_region(0x108, 2);
return 1;
}
outb_p(0xa5,0x108); /* disable umc */
umc_set_speeds (current_speeds);
local_irq_restore(flags);
hwif = &ide_hwifs[0];
mate = &ide_hwifs[1];
hwif->chipset = ide_umc8672;
hwif->tuneproc = &tune_umc;
hwif->mate = mate;
mate->chipset = ide_umc8672;
mate->tuneproc = &tune_umc;
mate->mate = hwif;
mate->channel = 1;
probe_hwif_init(hwif);
probe_hwif_init(mate);
create_proc_ide_interfaces();
return 0;
}
int probe_umc8672 = 0;
module_param_named(probe, probe_umc8672, bool, 0);
MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
/* Can be called directly from ide.c. */
int __init umc8672_init(void)
{
if (probe_umc8672 == 0)
goto out;
if (umc8672_probe() == 0)
return 0;;
out:
return -ENODEV;;
}
#ifdef MODULE
module_init(umc8672_init);
#endif
MODULE_AUTHOR("Wolfram Podien");
MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
MODULE_LICENSE("GPL");