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
23static int probe_mask;
24module_param(probe_mask, int, 0);
25MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
26
27static 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
33static const u16 legacy_bases[] = { 0x1f0 };
34static const int legacy_irqs[]  = { IRQ_HARDDISK };
35#elif defined(CONFIG_ALPHA)
36static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
37static const int legacy_irqs[]  = { 14, 15, 11, 10 };
38#else
39static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
40static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
41#endif
42
43static 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
77static 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
137module_init(ide_generic_init);
138
139MODULE_LICENSE("GPL");
140