Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * generic/default IDE host driver
3 *
4 * Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz
5 * This code was split off from ide.c. See it for original copyrights.
6 *
7 * May be copied or modified under the terms of the GNU General Public License.
8 */
9
10/*
11 * For special cases new interfaces may be added using sysfs, i.e.
12 *
13 * echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add
14 *
15 * will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10.
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/module.h>
21#include <linux/ide.h>
22
23/* FIXME: convert m32r to use ide_platform host driver */
24#ifdef CONFIG_M32R
25#include <asm/m32r.h>
26#endif
27
28#define DRV_NAME "ide_generic"
29
30static int probe_mask = 0x03;
31module_param(probe_mask, int, 0);
32MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
33
34static ssize_t store_add(struct class *cls, const char *buf, size_t n)
35{
36 unsigned int base, ctl;
37 int irq, rc;
38 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
39
40 if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
41 return -EINVAL;
42
43 memset(&hw, 0, sizeof(hw));
44 ide_std_init_ports(&hw, base, ctl);
45 hw.irq = irq;
46 hw.chipset = ide_generic;
47
48 rc = ide_host_add(NULL, hws, NULL);
49 if (rc)
50 return rc;
51
52 return n;
53};
54
55static struct class_attribute ide_generic_class_attrs[] = {
56 __ATTR(add, S_IWUSR, NULL, store_add),
57 __ATTR_NULL
58};
59
60static void ide_generic_class_release(struct class *cls)
61{
62 kfree(cls);
63}
64
65static int __init ide_generic_sysfs_init(void)
66{
67 struct class *cls;
68 int rc;
69
70 cls = kzalloc(sizeof(*cls), GFP_KERNEL);
71 if (!cls)
72 return -ENOMEM;
73
74 cls->name = DRV_NAME;
75 cls->owner = THIS_MODULE;
76 cls->class_release = ide_generic_class_release;
77 cls->class_attrs = ide_generic_class_attrs;
78
79 rc = class_register(cls);
80 if (rc) {
81 kfree(cls);
82 return rc;
83 }
84
85 return 0;
86}
87
88#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) \
89 || defined(CONFIG_PLAT_OPSPUT)
90static const u16 legacy_bases[] = { 0x1f0 };
91static const int legacy_irqs[] = { PLD_IRQ_CFIREQ };
92#elif defined(CONFIG_PLAT_MAPPI3)
93static const u16 legacy_bases[] = { 0x1f0, 0x170 };
94static const int legacy_irqs[] = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
95#elif defined(CONFIG_ALPHA)
96static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
97static const int legacy_irqs[] = { 14, 15, 11, 10 };
98#else
99static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
100static const int legacy_irqs[] = { 14, 15, 11, 10, 8, 12 };
101#endif
102
103static int __init ide_generic_init(void)
104{
105 hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
106 struct ide_host *host;
107 unsigned long io_addr;
108 int i, rc;
109
110#ifdef CONFIG_MIPS
111 if (!ide_probe_legacy())
112 return -ENODEV;
113#endif
114 printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
115 "parameter for probing all legacy ISA IDE ports\n");
116
117 memset(hws, 0, sizeof(hw_regs_t *) * MAX_HWIFS);
118
119 for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
120 io_addr = legacy_bases[i];
121
122 hws[i] = NULL;
123
124 if ((probe_mask & (1 << i)) && io_addr) {
125 if (!request_region(io_addr, 8, DRV_NAME)) {
126 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
127 "not free.\n",
128 DRV_NAME, io_addr, io_addr + 7);
129 continue;
130 }
131
132 if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
133 printk(KERN_ERR "%s: I/O resource 0x%lX "
134 "not free.\n",
135 DRV_NAME, io_addr + 0x206);
136 release_region(io_addr, 8);
137 continue;
138 }
139
140 memset(&hw[i], 0, sizeof(hw[i]));
141 ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
142#ifdef CONFIG_IA64
143 hw[i].irq = isa_irq_to_vector(legacy_irqs[i]);
144#else
145 hw[i].irq = legacy_irqs[i];
146#endif
147 hw[i].chipset = ide_generic;
148
149 hws[i] = &hw[i];
150 }
151 }
152
153 host = ide_host_alloc_all(NULL, hws);
154 if (host == NULL) {
155 rc = -ENOMEM;
156 goto err;
157 }
158
159 rc = ide_host_register(host, NULL, hws);
160 if (rc)
161 goto err_free;
162
163 if (ide_generic_sysfs_init())
164 printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
165 "class\n");
166
167 return 0;
168err_free:
169 ide_host_free(host);
170err:
171 for (i = 0; i < MAX_HWIFS; i++) {
172 if (hws[i] == NULL)
173 continue;
174
175 io_addr = hws[i]->io_ports.data_addr;
176 release_region(io_addr + 0x206, 1);
177 release_region(io_addr, 8);
178 }
179 return rc;
180}
181
182module_init(ide_generic_init);
183
184MODULE_LICENSE("GPL");