drm/radeon/kms: fix radeon_dp_get_modes for LVDS bridges (v2)
[linux-2.6.git] / drivers / ide / ide-generic.c
1 /*
2  * generic/default IDE host driver
3  *
4  * Copyright (C) 2004, 2008-2009 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 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/ide.h>
14 #include <linux/pci_ids.h>
15
16 /* FIXME: convert arm and m32r to use ide_platform host driver */
17 #ifdef CONFIG_ARM
18 #include <asm/irq.h>
19 #endif
20 #ifdef CONFIG_M32R
21 #include <asm/m32r.h>
22 #endif
23
24 #define DRV_NAME        "ide_generic"
25
26 static int probe_mask;
27 module_param(probe_mask, int, 0);
28 MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
29
30 static const struct ide_port_info ide_generic_port_info = {
31         .host_flags             = IDE_HFLAG_NO_DMA,
32         .chipset                = ide_generic,
33 };
34
35 #ifdef CONFIG_ARM
36 static const u16 legacy_bases[] = { 0x1f0 };
37 static const int legacy_irqs[]  = { IRQ_HARDDISK };
38 #elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
39       defined(CONFIG_PLAT_OPSPUT)
40 static const u16 legacy_bases[] = { 0x1f0 };
41 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
42 #elif defined(CONFIG_PLAT_MAPPI3)
43 static const u16 legacy_bases[] = { 0x1f0, 0x170 };
44 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
45 #elif defined(CONFIG_ALPHA)
46 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
47 static const int legacy_irqs[]  = { 14, 15, 11, 10 };
48 #else
49 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
50 static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
51 #endif
52
53 static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
54 {
55 #ifdef CONFIG_PCI
56         struct pci_dev *p = NULL;
57         u16 val;
58
59         for_each_pci_dev(p) {
60                 if (pci_resource_start(p, 0) == 0x1f0)
61                         *primary = 1;
62                 if (pci_resource_start(p, 2) == 0x170)
63                         *secondary = 1;
64
65                 /* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */
66                 if (p->vendor == PCI_VENDOR_ID_CYRIX &&
67                     (p->device == PCI_DEVICE_ID_CYRIX_5510 ||
68                      p->device == PCI_DEVICE_ID_CYRIX_5520))
69                         *primary = *secondary = 1;
70
71                 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
72                 if (p->vendor == PCI_VENDOR_ID_INTEL &&
73                     p->device == PCI_DEVICE_ID_INTEL_82371MX) {
74                         pci_read_config_word(p, 0x6C, &val);
75                         if (val & 0x8000) {
76                                 /* ATA port enabled */
77                                 if (val & 0x4000)
78                                         *secondary = 1;
79                                 else
80                                         *primary = 1;
81                         }
82                 }
83         }
84 #endif
85 }
86
87 static int __init ide_generic_init(void)
88 {
89         struct ide_hw hw, *hws[] = { &hw };
90         unsigned long io_addr;
91         int i, rc = 0, primary = 0, secondary = 0;
92
93         ide_generic_check_pci_legacy_iobases(&primary, &secondary);
94
95         if (!probe_mask) {
96                 printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
97                      "module parameter for probing all legacy ISA IDE ports\n");
98
99                 if (primary == 0)
100                         probe_mask |= 0x1;
101
102                 if (secondary == 0)
103                         probe_mask |= 0x2;
104         } else
105                 printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports "
106                         "upon user request\n");
107
108         for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
109                 io_addr = legacy_bases[i];
110
111                 if ((probe_mask & (1 << i)) && io_addr) {
112                         if (!request_region(io_addr, 8, DRV_NAME)) {
113                                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
114                                                 "not free.\n",
115                                                 DRV_NAME, io_addr, io_addr + 7);
116                                 rc = -EBUSY;
117                                 continue;
118                         }
119
120                         if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
121                                 printk(KERN_ERR "%s: I/O resource 0x%lX "
122                                                 "not free.\n",
123                                                 DRV_NAME, io_addr + 0x206);
124                                 release_region(io_addr, 8);
125                                 rc = -EBUSY;
126                                 continue;
127                         }
128
129                         memset(&hw, 0, sizeof(hw));
130                         ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
131 #ifdef CONFIG_IA64
132                         hw.irq = isa_irq_to_vector(legacy_irqs[i]);
133 #else
134                         hw.irq = legacy_irqs[i];
135 #endif
136                         rc = ide_host_add(&ide_generic_port_info, hws, 1, NULL);
137                         if (rc) {
138                                 release_region(io_addr + 0x206, 1);
139                                 release_region(io_addr, 8);
140                         }
141                 }
142         }
143
144         return rc;
145 }
146
147 module_init(ide_generic_init);
148
149 MODULE_LICENSE("GPL");