2 * generic/default IDE host driver
4 * Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz
5 * This code was split off from ide.c. See it for original copyrights.
7 * May be copied or modified under the terms of the GNU General Public License.
11 * For special cases new interfaces may be added using sysfs, i.e.
13 * echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add
15 * will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10.
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/module.h>
21 #include <linux/ide.h>
23 #define DRV_NAME "ide_generic"
25 static int probe_mask = 0x03;
26 module_param(probe_mask, int, 0);
27 MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
29 static ssize_t store_add(struct class *cls, const char *buf, size_t n)
32 unsigned int base, ctl;
34 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
35 u8 idx[] = { 0xff, 0xff, 0xff, 0xff };
37 if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
40 hwif = ide_find_port();
44 memset(&hw, 0, sizeof(hw));
45 ide_std_init_ports(&hw, base, ctl);
47 hw.chipset = ide_generic;
51 ide_device_add(idx, NULL, hws);
56 static struct class_attribute ide_generic_class_attrs[] = {
57 __ATTR(add, S_IWUSR, NULL, store_add),
61 static void ide_generic_class_release(struct class *cls)
66 static int __init ide_generic_sysfs_init(void)
71 cls = kzalloc(sizeof(*cls), GFP_KERNEL);
76 cls->owner = THIS_MODULE;
77 cls->class_release = ide_generic_class_release;
78 cls->class_attrs = ide_generic_class_attrs;
80 rc = class_register(cls);
89 static int __init ide_generic_init(void)
91 hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
95 printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
96 "parameter for probing all legacy ISA IDE ports\n");
98 for (i = 0; i < MAX_HWIFS; i++) {
100 unsigned long io_addr = ide_default_io_base(i);
105 if ((probe_mask & (1 << i)) && io_addr) {
106 if (!request_region(io_addr, 8, DRV_NAME)) {
107 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
109 DRV_NAME, io_addr, io_addr + 7);
113 if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
114 printk(KERN_ERR "%s: I/O resource 0x%lX "
116 DRV_NAME, io_addr + 0x206);
117 release_region(io_addr, 8);
122 * Skip probing if the corresponding
123 * slot is already occupied.
125 hwif = ide_find_port();
126 if (hwif == NULL || hwif->index != i) {
131 hwif->chipset = ide_generic;
133 memset(&hw[i], 0, sizeof(hw[i]));
134 ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
135 hw[i].irq = ide_default_irq(io_addr);
136 hw[i].chipset = ide_generic;
143 ide_device_add_all(idx, NULL, hws);
145 if (ide_generic_sysfs_init())
146 printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
152 module_init(ide_generic_init);
154 MODULE_LICENSE("GPL");