Merge branch 'rusty-cpumask-parisc' into parisc
[linux-2.6] / drivers / ide / ide-generic.c
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 #include <linux/pci_ids.h>
23
24 /* FIXME: convert m32r to use ide_platform host driver */
25 #ifdef CONFIG_M32R
26 #include <asm/m32r.h>
27 #endif
28
29 #define DRV_NAME        "ide_generic"
30
31 static int probe_mask;
32 module_param(probe_mask, int, 0);
33 MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
34
35 static const struct ide_port_info ide_generic_port_info = {
36         .host_flags             = IDE_HFLAG_NO_DMA,
37 };
38
39 static ssize_t store_add(struct class *cls, const char *buf, size_t n)
40 {
41         unsigned int base, ctl;
42         int irq, rc;
43         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
44
45         if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
46                 return -EINVAL;
47
48         memset(&hw, 0, sizeof(hw));
49         ide_std_init_ports(&hw, base, ctl);
50         hw.irq = irq;
51         hw.chipset = ide_generic;
52
53         rc = ide_host_add(&ide_generic_port_info, hws, NULL);
54         if (rc)
55                 return rc;
56
57         return n;
58 };
59
60 static struct class_attribute ide_generic_class_attrs[] = {
61         __ATTR(add, S_IWUSR, NULL, store_add),
62         __ATTR_NULL
63 };
64
65 static void ide_generic_class_release(struct class *cls)
66 {
67         kfree(cls);
68 }
69
70 static int __init ide_generic_sysfs_init(void)
71 {
72         struct class *cls;
73         int rc;
74
75         cls = kzalloc(sizeof(*cls), GFP_KERNEL);
76         if (!cls)
77                 return -ENOMEM;
78
79         cls->name = DRV_NAME;
80         cls->owner = THIS_MODULE;
81         cls->class_release = ide_generic_class_release;
82         cls->class_attrs = ide_generic_class_attrs;
83
84         rc = class_register(cls);
85         if (rc) {
86                 kfree(cls);
87                 return rc;
88         }
89
90         return 0;
91 }
92
93 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) \
94         || defined(CONFIG_PLAT_OPSPUT)
95 static const u16 legacy_bases[] = { 0x1f0 };
96 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
97 #elif defined(CONFIG_PLAT_MAPPI3)
98 static const u16 legacy_bases[] = { 0x1f0, 0x170 };
99 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
100 #elif defined(CONFIG_ALPHA)
101 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
102 static const int legacy_irqs[]  = { 14, 15, 11, 10 };
103 #else
104 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
105 static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
106 #endif
107
108 static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
109 {
110         struct pci_dev *p = NULL;
111         u16 val;
112
113         for_each_pci_dev(p) {
114
115                 if (pci_resource_start(p, 0) == 0x1f0)
116                         *primary = 1;
117                 if (pci_resource_start(p, 2) == 0x170)
118                         *secondary = 1;
119
120                 /* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */
121                 if (p->vendor == PCI_VENDOR_ID_CYRIX &&
122                     (p->device == PCI_DEVICE_ID_CYRIX_5510 ||
123                      p->device == PCI_DEVICE_ID_CYRIX_5520))
124                         *primary = *secondary = 1;
125
126                 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
127                 if (p->vendor == PCI_VENDOR_ID_INTEL &&
128                     p->device == PCI_DEVICE_ID_INTEL_82371MX) {
129
130                         pci_read_config_word(p, 0x6C, &val);
131                         if (val & 0x8000) {
132                                 /* ATA port enabled */
133                                 if (val & 0x4000)
134                                         *secondary = 1;
135                                 else
136                                         *primary = 1;
137                         }
138                 }
139         }
140 }
141
142 static int __init ide_generic_init(void)
143 {
144         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
145         unsigned long io_addr;
146         int i, rc = 0, primary = 0, secondary = 0;
147
148         ide_generic_check_pci_legacy_iobases(&primary, &secondary);
149
150         if (!probe_mask) {
151                 printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
152                      "module parameter for probing all legacy ISA IDE ports\n");
153
154                 if (primary == 0)
155                         probe_mask |= 0x1;
156
157                 if (secondary == 0)
158                         probe_mask |= 0x2;
159         } else
160                 printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports "
161                         "upon user request\n");
162
163         for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
164                 io_addr = legacy_bases[i];
165
166                 if ((probe_mask & (1 << i)) && io_addr) {
167                         if (!request_region(io_addr, 8, DRV_NAME)) {
168                                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
169                                                 "not free.\n",
170                                                 DRV_NAME, io_addr, io_addr + 7);
171                                 continue;
172                         }
173
174                         if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
175                                 printk(KERN_ERR "%s: I/O resource 0x%lX "
176                                                 "not free.\n",
177                                                 DRV_NAME, io_addr + 0x206);
178                                 release_region(io_addr, 8);
179                                 continue;
180                         }
181
182                         memset(&hw, 0, sizeof(hw));
183                         ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
184 #ifdef CONFIG_IA64
185                         hw.irq = isa_irq_to_vector(legacy_irqs[i]);
186 #else
187                         hw.irq = legacy_irqs[i];
188 #endif
189                         hw.chipset = ide_generic;
190
191                         rc = ide_host_add(&ide_generic_port_info, hws, NULL);
192                         if (rc) {
193                                 release_region(io_addr + 0x206, 1);
194                                 release_region(io_addr, 8);
195                         }
196                 }
197         }
198
199         if (ide_generic_sysfs_init())
200                 printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
201                                          "class\n");
202
203         return rc;
204 }
205
206 module_init(ide_generic_init);
207
208 MODULE_LICENSE("GPL");