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