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)
31 unsigned int base, ctl;
33 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
35 if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
38 memset(&hw, 0, sizeof(hw));
39 ide_std_init_ports(&hw, base, ctl);
41 hw.chipset = ide_generic;
43 rc = ide_host_add(NULL, hws, NULL);
50 static struct class_attribute ide_generic_class_attrs[] = {
51 __ATTR(add, S_IWUSR, NULL, store_add),
55 static void ide_generic_class_release(struct class *cls)
60 static int __init ide_generic_sysfs_init(void)
65 cls = kzalloc(sizeof(*cls), GFP_KERNEL);
70 cls->owner = THIS_MODULE;
71 cls->class_release = ide_generic_class_release;
72 cls->class_attrs = ide_generic_class_attrs;
74 rc = class_register(cls);
83 static int __init ide_generic_init(void)
85 hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
86 struct ide_host *host;
87 unsigned long io_addr;
90 printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
91 "parameter for probing all legacy ISA IDE ports\n");
93 for (i = 0; i < MAX_HWIFS; i++) {
94 io_addr = ide_default_io_base(i);
98 if ((probe_mask & (1 << i)) && io_addr) {
99 if (!request_region(io_addr, 8, DRV_NAME)) {
100 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
102 DRV_NAME, io_addr, io_addr + 7);
106 if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
107 printk(KERN_ERR "%s: I/O resource 0x%lX "
109 DRV_NAME, io_addr + 0x206);
110 release_region(io_addr, 8);
114 memset(&hw[i], 0, sizeof(hw[i]));
115 ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
116 hw[i].irq = ide_default_irq(io_addr);
117 hw[i].chipset = ide_generic;
123 host = ide_host_alloc_all(NULL, hws);
129 rc = ide_host_register(host, NULL, hws);
133 if (ide_generic_sysfs_init())
134 printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
141 for (i = 0; i < MAX_HWIFS; i++) {
145 io_addr = hws[i]->io_ports.data_addr;
146 release_region(io_addr + 0x206, 1);
147 release_region(io_addr, 8);
152 module_init(ide_generic_init);
154 MODULE_LICENSE("GPL");