forked from Minki/linux
0cbccbc30a
We can't probe all legacy ISA IDE ports by default as the resources may be
occupied by other ISA devices. Add "probe_mask" module parameter and probe
only first two ISA IDE ports by default leaving the decision about probing
the rest to the user (systems with ISA ide2-6 should be very, very rare).
This fixes a regression caused by:
commit 343a3451e2
Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Tue Jun 10 20:56:36 2008 +0200
ide-generic: add missing hwif->chipset setup
...
Reported-by: Mikael Pettersson <mikpe@it.uu.se>
Bisected-by: Mikael Pettersson <mikpe@it.uu.se>
Tested-by: Mikael Pettersson <mikpe@it.uu.se>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
154 lines
3.1 KiB
C
154 lines
3.1 KiB
C
/*
|
|
* generic/default IDE host driver
|
|
*
|
|
* Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz
|
|
* This code was split off from ide.c. See it for original copyrights.
|
|
*
|
|
* May be copied or modified under the terms of the GNU General Public License.
|
|
*/
|
|
|
|
/*
|
|
* For special cases new interfaces may be added using sysfs, i.e.
|
|
*
|
|
* echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add
|
|
*
|
|
* will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ide.h>
|
|
|
|
#define DRV_NAME "ide_generic"
|
|
|
|
static int probe_mask = 0x03;
|
|
module_param(probe_mask, int, 0);
|
|
MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
|
|
|
|
static ssize_t store_add(struct class *cls, const char *buf, size_t n)
|
|
{
|
|
ide_hwif_t *hwif;
|
|
unsigned int base, ctl;
|
|
int irq;
|
|
hw_regs_t hw;
|
|
u8 idx[] = { 0xff, 0xff, 0xff, 0xff };
|
|
|
|
if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
|
|
return -EINVAL;
|
|
|
|
hwif = ide_find_port();
|
|
if (hwif == NULL)
|
|
return -ENOENT;
|
|
|
|
memset(&hw, 0, sizeof(hw));
|
|
ide_std_init_ports(&hw, base, ctl);
|
|
hw.irq = irq;
|
|
hw.chipset = ide_generic;
|
|
|
|
ide_init_port_hw(hwif, &hw);
|
|
|
|
idx[0] = hwif->index;
|
|
|
|
ide_device_add(idx, NULL);
|
|
|
|
return n;
|
|
};
|
|
|
|
static struct class_attribute ide_generic_class_attrs[] = {
|
|
__ATTR(add, S_IWUSR, NULL, store_add),
|
|
__ATTR_NULL
|
|
};
|
|
|
|
static void ide_generic_class_release(struct class *cls)
|
|
{
|
|
kfree(cls);
|
|
}
|
|
|
|
static int __init ide_generic_sysfs_init(void)
|
|
{
|
|
struct class *cls;
|
|
int rc;
|
|
|
|
cls = kzalloc(sizeof(*cls), GFP_KERNEL);
|
|
if (!cls)
|
|
return -ENOMEM;
|
|
|
|
cls->name = DRV_NAME;
|
|
cls->owner = THIS_MODULE;
|
|
cls->class_release = ide_generic_class_release;
|
|
cls->class_attrs = ide_generic_class_attrs;
|
|
|
|
rc = class_register(cls);
|
|
if (rc) {
|
|
kfree(cls);
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init ide_generic_init(void)
|
|
{
|
|
u8 idx[MAX_HWIFS];
|
|
int i;
|
|
|
|
printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
|
|
"parameter for probing all legacy ISA IDE ports\n");
|
|
|
|
for (i = 0; i < MAX_HWIFS; i++) {
|
|
ide_hwif_t *hwif;
|
|
unsigned long io_addr = ide_default_io_base(i);
|
|
hw_regs_t hw;
|
|
|
|
idx[i] = 0xff;
|
|
|
|
if ((probe_mask & (1 << i)) && io_addr) {
|
|
if (!request_region(io_addr, 8, DRV_NAME)) {
|
|
printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
|
|
"not free.\n",
|
|
DRV_NAME, io_addr, io_addr + 7);
|
|
continue;
|
|
}
|
|
|
|
if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
|
|
printk(KERN_ERR "%s: I/O resource 0x%lX "
|
|
"not free.\n",
|
|
DRV_NAME, io_addr + 0x206);
|
|
release_region(io_addr, 8);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Skip probing if the corresponding
|
|
* slot is already occupied.
|
|
*/
|
|
hwif = ide_find_port();
|
|
if (hwif == NULL || hwif->index != i) {
|
|
idx[i] = 0xff;
|
|
continue;
|
|
}
|
|
|
|
memset(&hw, 0, sizeof(hw));
|
|
ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
|
|
hw.irq = ide_default_irq(io_addr);
|
|
hw.chipset = ide_generic;
|
|
ide_init_port_hw(hwif, &hw);
|
|
|
|
idx[i] = i;
|
|
}
|
|
}
|
|
|
|
ide_device_add_all(idx, NULL);
|
|
|
|
if (ide_generic_sysfs_init())
|
|
printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
|
|
"class\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init(ide_generic_init);
|
|
|
|
MODULE_LICENSE("GPL");
|