48c3c10726
* Add struct ide_host which keeps pointers to host's ports. * Add ide_host_alloc[_all]() and ide_host_remove() helpers. * Pass 'struct ide_host *host' instead of 'u8 *idx' to ide_device_add[_all]() and rename it to ide_host_register[_all](). * Convert host drivers and core code to use struct ide_host. * Remove no longer needed ide_find_port(). * Make ide_find_port_slot() static. * Unexport ide_unregister(). v2: * Add missing 'struct ide_host *host' to macide.c. v3: * Fix build problem in pmac.c (s/ide_alloc_host/ide_host_alloc/) (Noticed by Stephen Rothwell). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
139 lines
3.0 KiB
C
139 lines
3.0 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)
|
|
{
|
|
struct ide_host *host;
|
|
unsigned int base, ctl;
|
|
int irq;
|
|
hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
|
|
|
|
if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
|
|
return -EINVAL;
|
|
|
|
memset(&hw, 0, sizeof(hw));
|
|
ide_std_init_ports(&hw, base, ctl);
|
|
hw.irq = irq;
|
|
hw.chipset = ide_generic;
|
|
|
|
host = ide_host_alloc(NULL, hws);
|
|
if (host == NULL)
|
|
return -ENOENT;
|
|
|
|
ide_host_register(host, NULL, hws);
|
|
|
|
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)
|
|
{
|
|
hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
|
|
struct ide_host *host;
|
|
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++) {
|
|
unsigned long io_addr = ide_default_io_base(i);
|
|
|
|
hws[i] = NULL;
|
|
|
|
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;
|
|
}
|
|
|
|
memset(&hw[i], 0, sizeof(hw[i]));
|
|
ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
|
|
hw[i].irq = ide_default_irq(io_addr);
|
|
hw[i].chipset = ide_generic;
|
|
|
|
hws[i] = &hw[i];
|
|
}
|
|
}
|
|
|
|
host = ide_host_alloc_all(NULL, hws);
|
|
if (host)
|
|
ide_host_register(host, NULL, hws);
|
|
|
|
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");
|