Merge branch 'x86-setup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / 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 };
33
34 #ifdef CONFIG_ARM
35 static const u16 legacy_bases[] = { 0x1f0 };
36 static const int legacy_irqs[]  = { IRQ_HARDDISK };
37 #elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
38       defined(CONFIG_PLAT_OPSPUT)
39 static const u16 legacy_bases[] = { 0x1f0 };
40 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
41 #elif defined(CONFIG_PLAT_MAPPI3)
42 static const u16 legacy_bases[] = { 0x1f0, 0x170 };
43 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
44 #elif defined(CONFIG_ALPHA)
45 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
46 static const int legacy_irqs[]  = { 14, 15, 11, 10 };
47 #else
48 static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
49 static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
50 #endif
51
52 static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
53 {
54 #ifdef CONFIG_PCI
55         struct pci_dev *p = NULL;
56         u16 val;
57
58         for_each_pci_dev(p) {
59                 if (pci_resource_start(p, 0) == 0x1f0)
60                         *primary = 1;
61                 if (pci_resource_start(p, 2) == 0x170)
62                         *secondary = 1;
63
64                 /* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */
65                 if (p->vendor == PCI_VENDOR_ID_CYRIX &&
66                     (p->device == PCI_DEVICE_ID_CYRIX_5510 ||
67                      p->device == PCI_DEVICE_ID_CYRIX_5520))
68                         *primary = *secondary = 1;
69
70                 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
71                 if (p->vendor == PCI_VENDOR_ID_INTEL &&
72                     p->device == PCI_DEVICE_ID_INTEL_82371MX) {
73                         pci_read_config_word(p, 0x6C, &val);
74                         if (val & 0x8000) {
75                                 /* ATA port enabled */
76                                 if (val & 0x4000)
77                                         *secondary = 1;
78                                 else
79                                         *primary = 1;
80                         }
81                 }
82         }
83 #endif
84 }
85
86 static int __init ide_generic_init(void)
87 {
88         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
89         unsigned long io_addr;
90         int i, rc = 0, primary = 0, secondary = 0;
91
92         ide_generic_check_pci_legacy_iobases(&primary, &secondary);
93
94         if (!probe_mask) {
95                 printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
96                      "module parameter for probing all legacy ISA IDE ports\n");
97
98                 if (primary == 0)
99                         probe_mask |= 0x1;
100
101                 if (secondary == 0)
102                         probe_mask |= 0x2;
103         } else
104                 printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports "
105                         "upon user request\n");
106
107         for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
108                 io_addr = legacy_bases[i];
109
110                 if ((probe_mask & (1 << i)) && io_addr) {
111                         if (!request_region(io_addr, 8, DRV_NAME)) {
112                                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
113                                                 "not free.\n",
114                                                 DRV_NAME, io_addr, io_addr + 7);
115                                 rc = -EBUSY;
116                                 continue;
117                         }
118
119                         if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
120                                 printk(KERN_ERR "%s: I/O resource 0x%lX "
121                                                 "not free.\n",
122                                                 DRV_NAME, io_addr + 0x206);
123                                 release_region(io_addr, 8);
124                                 rc = -EBUSY;
125                                 continue;
126                         }
127
128                         memset(&hw, 0, sizeof(hw));
129                         ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
130 #ifdef CONFIG_IA64
131                         hw.irq = isa_irq_to_vector(legacy_irqs[i]);
132 #else
133                         hw.irq = legacy_irqs[i];
134 #endif
135                         hw.chipset = ide_generic;
136
137                         rc = ide_host_add(&ide_generic_port_info, hws, NULL);
138                         if (rc) {
139                                 release_region(io_addr + 0x206, 1);
140                                 release_region(io_addr, 8);
141                         }
142                 }
143         }
144
145         return rc;
146 }
147
148 module_init(ide_generic_init);
149
150 MODULE_LICENSE("GPL");