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
26static int probe_mask;
27module_param(probe_mask, int, 0);
28MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
29
30static 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
36static const u16 legacy_bases[] = { 0x1f0 };
37static const int legacy_irqs[]  = { IRQ_HARDDISK };
38#elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
39      defined(CONFIG_PLAT_OPSPUT)
40static const u16 legacy_bases[] = { 0x1f0 };
41static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
42#elif defined(CONFIG_PLAT_MAPPI3)
43static const u16 legacy_bases[] = { 0x1f0, 0x170 };
44static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
45#elif defined(CONFIG_ALPHA)
46static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
47static const int legacy_irqs[]  = { 14, 15, 11, 10 };
48#else
49static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
50static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
51#endif
52
53static 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
87static 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
147module_init(ide_generic_init);
148
149MODULE_LICENSE("GPL");
150