mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
2bfba3c444
Suggested-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
/*
|
|
* Copyright (C) 1996 Linus Torvalds & author (see below)
|
|
*/
|
|
|
|
#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 "dtc2278"
|
|
|
|
/*
|
|
* Changing this #undef to #define may solve start up problems in some systems.
|
|
*/
|
|
#undef ALWAYS_SET_DTC2278_PIO_MODE
|
|
|
|
/*
|
|
* From: andy@cercle.cts.com (Dyan Wile)
|
|
*
|
|
* Below is a patch for DTC-2278 - alike software-programmable controllers
|
|
* The code enables the secondary IDE controller and the PIO4 (3?) timings on
|
|
* the primary (EIDE). You may probably have to enable the 32-bit support to
|
|
* get the full speed. You better get the disk interrupts disabled ( hdparm -u0
|
|
* /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
|
|
* filesystem corrupted with -u1, but under heavy disk load only :-)
|
|
*
|
|
* This card is now forced to use the "serialize" feature,
|
|
* and irq-unmasking is disallowed. If io_32bit is enabled,
|
|
* it must be done for BOTH drives on each interface.
|
|
*
|
|
* This code was written for the DTC2278E, but might work with any of these:
|
|
*
|
|
* DTC2278S has only a single IDE interface.
|
|
* DTC2278D has two IDE interfaces and is otherwise identical to the S version.
|
|
* DTC2278E also has serial ports and a printer port
|
|
* DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>
|
|
*
|
|
* There may be a fourth controller type. The S and D versions use the
|
|
* Winbond chip, and I think the E version does also.
|
|
*
|
|
*/
|
|
|
|
static void sub22 (char b, char c)
|
|
{
|
|
int i;
|
|
|
|
for(i = 0; i < 3; ++i) {
|
|
inb(0x3f6);
|
|
outb_p(b,0xb0);
|
|
inb(0x3f6);
|
|
outb_p(c,0xb4);
|
|
inb(0x3f6);
|
|
if(inb(0xb4) == c) {
|
|
outb_p(7,0xb0);
|
|
inb(0x3f6);
|
|
return; /* success */
|
|
}
|
|
}
|
|
}
|
|
|
|
static DEFINE_SPINLOCK(dtc2278_lock);
|
|
|
|
static void dtc2278_set_pio_mode(ide_drive_t *drive, const u8 pio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (pio >= 3) {
|
|
spin_lock_irqsave(&dtc2278_lock, flags);
|
|
/*
|
|
* This enables PIO mode4 (3?) on the first interface
|
|
*/
|
|
sub22(1,0xc3);
|
|
sub22(0,0xa0);
|
|
spin_unlock_irqrestore(&dtc2278_lock, flags);
|
|
} else {
|
|
/* we don't know how to set it back again.. */
|
|
/* Actually we do - there is a data sheet available for the
|
|
Winbond but does anyone actually care */
|
|
}
|
|
}
|
|
|
|
static const struct ide_port_ops dtc2278_port_ops = {
|
|
.set_pio_mode = dtc2278_set_pio_mode,
|
|
};
|
|
|
|
static const struct ide_port_info dtc2278_port_info __initdata = {
|
|
.name = DRV_NAME,
|
|
.chipset = ide_dtc2278,
|
|
.port_ops = &dtc2278_port_ops,
|
|
.host_flags = IDE_HFLAG_SERIALIZE |
|
|
IDE_HFLAG_NO_UNMASK_IRQS |
|
|
IDE_HFLAG_IO_32BIT |
|
|
/* disallow ->io_32bit changes */
|
|
IDE_HFLAG_NO_IO_32BIT |
|
|
IDE_HFLAG_NO_DMA,
|
|
.pio_mask = ATA_PIO4,
|
|
};
|
|
|
|
static int __init dtc2278_probe(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
/*
|
|
* This enables the second interface
|
|
*/
|
|
outb_p(4,0xb0);
|
|
inb(0x3f6);
|
|
outb_p(0x20,0xb4);
|
|
inb(0x3f6);
|
|
#ifdef ALWAYS_SET_DTC2278_PIO_MODE
|
|
/*
|
|
* This enables PIO mode4 (3?) on the first interface
|
|
* and may solve start-up problems for some people.
|
|
*/
|
|
sub22(1,0xc3);
|
|
sub22(0,0xa0);
|
|
#endif
|
|
local_irq_restore(flags);
|
|
|
|
return ide_legacy_device_add(&dtc2278_port_info, 0);
|
|
}
|
|
|
|
static int probe_dtc2278;
|
|
|
|
module_param_named(probe, probe_dtc2278, bool, 0);
|
|
MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets");
|
|
|
|
static int __init dtc2278_init(void)
|
|
{
|
|
if (probe_dtc2278 == 0)
|
|
return -ENODEV;
|
|
|
|
if (dtc2278_probe()) {
|
|
printk(KERN_ERR "dtc2278: ide interfaces already in use!\n");
|
|
return -EBUSY;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
module_init(dtc2278_init);
|
|
|
|
MODULE_AUTHOR("See Local File");
|
|
MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets");
|
|
MODULE_LICENSE("GPL");
|