mirror of
https://github.com/torvalds/linux.git
synced 2024-12-24 20:01:55 +00:00
09c434b8a0
Add SPDX license identifiers to all files which:
- Have no license information of any form
- Have MODULE_LICENCE("GPL*") inside which was used in the initial
scan/conversion to ignore the file
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
185 lines
5.0 KiB
C
185 lines
5.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* 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/ide.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#define DRV_NAME "umc8672"
|
|
|
|
/*
|
|
* 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] = {
|
|
{0x0f, 0x0b, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
|
|
{0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 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 umc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
|
|
{
|
|
ide_hwif_t *mate = hwif->mate;
|
|
unsigned long uninitialized_var(flags);
|
|
const u8 pio = drive->pio_mode - XFER_PIO_0;
|
|
|
|
printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
|
|
drive->name, pio, pio_to_umc[pio]);
|
|
if (mate)
|
|
spin_lock_irqsave(&mate->lock, flags);
|
|
if (mate && mate->handler) {
|
|
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);
|
|
}
|
|
if (mate)
|
|
spin_unlock_irqrestore(&mate->lock, flags);
|
|
}
|
|
|
|
static const struct ide_port_ops umc8672_port_ops = {
|
|
.set_pio_mode = umc_set_pio_mode,
|
|
};
|
|
|
|
static const struct ide_port_info umc8672_port_info __initconst = {
|
|
.name = DRV_NAME,
|
|
.chipset = ide_umc8672,
|
|
.port_ops = &umc8672_port_ops,
|
|
.host_flags = IDE_HFLAG_NO_DMA,
|
|
.pio_mask = ATA_PIO4,
|
|
};
|
|
|
|
static int __init umc8672_probe(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
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);
|
|
|
|
return ide_legacy_device_add(&umc8672_port_info, 0);
|
|
}
|
|
|
|
static bool probe_umc8672;
|
|
|
|
module_param_named(probe, probe_umc8672, bool, 0);
|
|
MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
|
|
|
|
static int __init umc8672_init(void)
|
|
{
|
|
if (probe_umc8672 == 0)
|
|
goto out;
|
|
|
|
if (umc8672_probe() == 0)
|
|
return 0;
|
|
out:
|
|
return -ENODEV;
|
|
}
|
|
|
|
module_init(umc8672_init);
|
|
|
|
MODULE_AUTHOR("Wolfram Podien");
|
|
MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
|
|
MODULE_LICENSE("GPL");
|