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/*
* linux/drivers/block/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/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 <asm/io.h>
#include "ide_modes.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 byte current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};
static const byte 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 byte 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 byte in_umc (char port)
{
outb_p (port,0x108);
return inb_p (0x109);
}
static void umc_set_speeds (byte 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, byte 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]);
save_flags(flags); /* all CPUs */
cli(); /* all CPUs */
if (hwgroup && hwgroup->handler != NULL) {
printk("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);
}
restore_flags(flags); /* all CPUs */
}
void init_umc8672 (void) /* called from ide.c */
{
unsigned long flags;
__save_flags(flags); /* local CPU only */
__cli(); /* local CPU only */
if (check_region(0x108, 2)) {
__restore_flags(flags);
printk("\numc8672: PORTS 0x108-0x109 ALREADY IN USE\n");
return;
}
outb_p (0x5A,0x108); /* enable umc */
if (in_umc (0xd5) != 0xa0)
{
__restore_flags(flags); /* local CPU only */
printk ("umc8672: not found\n");
return;
}
outb_p (0xa5,0x108); /* disable umc */
umc_set_speeds (current_speeds);
__restore_flags(flags); /* local CPU only */
request_region(0x108, 2, "umc8672");
ide_hwifs[0].chipset = ide_umc8672;
ide_hwifs[1].chipset = ide_umc8672;
ide_hwifs[0].tuneproc = &tune_umc;
ide_hwifs[1].tuneproc = &tune_umc;
ide_hwifs[0].mate = &ide_hwifs[1];
ide_hwifs[1].mate = &ide_hwifs[0];
ide_hwifs[1].channel = 1;
}
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