summaryrefslogtreecommitdiffstats
path: root/arch/sparc64/kernel/isa.c
blob: 98721a8f8619122b56852f7f8e99c1200a9cfada (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/isa.h>

struct sparc_isa_bridge *isa_chain;

static void __init fatal_err(const char *reason)
{
	prom_printf("ISA: fatal error, %s.\n", reason);
}

static void __init report_dev(struct sparc_isa_device *isa_dev, int child)
{
	if (child)
		printk(" (%s)", isa_dev->prom_node->name);
	else
		printk(" [%s", isa_dev->prom_node->name);
}

static void __init isa_dev_get_resource(struct sparc_isa_device *isa_dev)
{
	struct linux_prom_registers *pregs;
	unsigned long base, len;
	int prop_len;

	pregs = of_get_property(isa_dev->prom_node, "reg", &prop_len);
	if (!pregs)
		return;

	/* Only the first one is interesting. */
	len = pregs[0].reg_size;
	base = (((unsigned long)pregs[0].which_io << 32) |
		(unsigned long)pregs[0].phys_addr);
	base += isa_dev->bus->parent->io_space.start;

	isa_dev->resource.start = base;
	isa_dev->resource.end   = (base + len - 1UL);
	isa_dev->resource.flags = IORESOURCE_IO;
	isa_dev->resource.name  = isa_dev->prom_node->name;

	request_resource(&isa_dev->bus->parent->io_space,
			 &isa_dev->resource);
}

static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev)
{
	struct of_device *op = of_find_device_by_node(isa_dev->prom_node);

	if (!op || !op->num_irqs) {
		isa_dev->irq = PCI_IRQ_NONE;
	} else {
		isa_dev->irq = op->irqs[0];
	}
}

static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
{
	struct device_node *dp = parent_isa_dev->prom_node->child;

	if (!dp)
		return;

	printk(" ->");
	while (dp) {
		struct sparc_isa_device *isa_dev;

		isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
		if (!isa_dev) {
			fatal_err("cannot allocate child isa_dev");
			prom_halt();
		}

		/* Link it in to parent. */
		isa_dev->next = parent_isa_dev->child;
		parent_isa_dev->child = isa_dev;

		isa_dev->bus = parent_isa_dev->bus;
		isa_dev->prom_node = dp;

		isa_dev_get_resource(isa_dev);
		isa_dev_get_irq(isa_dev);

		report_dev(isa_dev, 1);

		dp = dp->sibling;
	}
}

static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
{
	struct device_node *dp = isa_br->prom_node->child;

	while (dp) {
		struct sparc_isa_device *isa_dev;

		isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
		if (!isa_dev) {
			printk(KERN_DEBUG "ISA: cannot allocate isa_dev");
			return;
		}

		isa_dev->ofdev.node = dp;
		isa_dev->ofdev.dev.parent = &isa_br->ofdev.dev;
		isa_dev->ofdev.dev.bus = &isa_bus_type;
		sprintf(isa_dev->ofdev.dev.bus_id, "isa[%08x]", dp->node);

		/* Register with core */
		if (of_device_register(&isa_dev->ofdev) != 0) {
			printk(KERN_DEBUG "isa: device registration error for %s!\n",
			       dp->path_component_name);
			kfree(isa_dev);
			goto next_sibling;
		}

		/* Link it in. */
		isa_dev->next = NULL;
		if (isa_br->devices == NULL) {
			isa_br->devices = isa_dev;
		} else {
			struct sparc_isa_device *tmp = isa_br->devices;

			while (tmp->next)
				tmp = tmp->next;

			tmp->next = isa_dev;
		}

		isa_dev->bus = isa_br;
		isa_dev->prom_node = dp;

		isa_dev_get_resource(isa_dev);
		isa_dev_get_irq(isa_dev);

		report_dev(isa_dev, 0);

		isa_fill_children(isa_dev);

		printk("]");

	next_sibling:
		dp = dp->sibling;
	}
}

void __init isa_init(void)
{
	struct pci_dev *pdev;
	unsigned short vendor, device;
	int index = 0;

	vendor = PCI_VENDOR_ID_AL;
	device = PCI_DEVICE_ID_AL_M1533;

	pdev = NULL;
	while ((pdev = pci_get_device(vendor, device, pdev)) != NULL) {
		struct pcidev_cookie *pdev_cookie;
		struct pci_pbm_info *pbm;
		struct sparc_isa_bridge *isa_br;
		struct device_node *dp;

		pdev_cookie = pdev->sysdata;
		if (!pdev_cookie) {
			printk("ISA: Warning, ISA bridge ignored due to "
			       "lack of OBP data.\n");
			continue;
		}
		pbm = pdev_cookie->pbm;
		dp = pdev_cookie->prom_node;

		isa_br = kzalloc(sizeof(*isa_br), GFP_KERNEL);
		if (!isa_br) {
			printk(KERN_DEBUG "isa: cannot allocate sparc_isa_bridge");
			return;
		}

		isa_br->ofdev.node = dp;
		isa_br->ofdev.dev.parent = &pdev->dev;
		isa_br->ofdev.dev.bus = &isa_bus_type;
		sprintf(isa_br->ofdev.dev.bus_id, "isa%d", index);

		/* Register with core */
		if (of_device_register(&isa_br->ofdev) != 0) {
			printk(KERN_DEBUG "isa: device registration error for %s!\n",
			       dp->path_component_name);
			kfree(isa_br);
			return;
		}

		/* Link it in. */
		isa_br->next = isa_chain;
		isa_chain = isa_br;

		isa_br->parent = pbm;
		isa_br->self = pdev;
		isa_br->index = index++;
		isa_br->prom_node = pdev_cookie->prom_node;

		printk("isa%d:", isa_br->index);

		isa_fill_devices(isa_br);

		printk("\n");
	}
}
OpenPOWER on IntegriCloud