1#include <linux/string.h>
2#include <linux/kernel.h>
3#include <linux/of.h>
4#include <linux/export.h>
5#include <linux/mod_devicetable.h>
6#include <linux/errno.h>
7#include <linux/irq.h>
8#include <linux/of_platform.h>
9#include <linux/of_address.h>
10#include <linux/of_device.h>
11#include <linux/of_irq.h>
12
13#include "of_device_common.h"
14
15unsigned int irq_of_parse_and_map(struct device_node *node, int index)
16{
17	struct platform_device *op = of_find_device_by_node(node);
18
19	if (!op || index >= op->archdata.num_irqs)
20		return 0;
21
22	return op->archdata.irqs[index];
23}
24EXPORT_SYMBOL(irq_of_parse_and_map);
25
26int of_address_to_resource(struct device_node *node, int index,
27			   struct resource *r)
28{
29	struct platform_device *op = of_find_device_by_node(node);
30
31	if (!op || index >= op->num_resources)
32		return -EINVAL;
33
34	memcpy(r, &op->archdata.resource[index], sizeof(*r));
35	return 0;
36}
37EXPORT_SYMBOL_GPL(of_address_to_resource);
38
39void __iomem *of_iomap(struct device_node *node, int index)
40{
41	struct platform_device *op = of_find_device_by_node(node);
42	struct resource *r;
43
44	if (!op || index >= op->num_resources)
45		return NULL;
46
47	r = &op->archdata.resource[index];
48
49	return of_ioremap(r, 0, resource_size(r), (char *) r->name);
50}
51EXPORT_SYMBOL(of_iomap);
52
53/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
54 * BUS and propagate to all child platform_device objects.
55 */
56void of_propagate_archdata(struct platform_device *bus)
57{
58	struct dev_archdata *bus_sd = &bus->dev.archdata;
59	struct device_node *bus_dp = bus->dev.of_node;
60	struct device_node *dp;
61
62	for (dp = bus_dp->child; dp; dp = dp->sibling) {
63		struct platform_device *op = of_find_device_by_node(dp);
64
65		op->dev.archdata.iommu = bus_sd->iommu;
66		op->dev.archdata.stc = bus_sd->stc;
67		op->dev.archdata.host_controller = bus_sd->host_controller;
68		op->dev.archdata.numa_node = bus_sd->numa_node;
69
70		if (dp->child)
71			of_propagate_archdata(op);
72	}
73}
74
75static void get_cells(struct device_node *dp, int *addrc, int *sizec)
76{
77	if (addrc)
78		*addrc = of_n_addr_cells(dp);
79	if (sizec)
80		*sizec = of_n_size_cells(dp);
81}
82
83/*
84 * Default translator (generic bus)
85 */
86
87void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
88{
89	get_cells(dev, addrc, sizec);
90}
91
92/* Make sure the least significant 64-bits are in-range.  Even
93 * for 3 or 4 cell values it is a good enough approximation.
94 */
95int of_out_of_range(const u32 *addr, const u32 *base,
96		    const u32 *size, int na, int ns)
97{
98	u64 a = of_read_addr(addr, na);
99	u64 b = of_read_addr(base, na);
100
101	if (a < b)
102		return 1;
103
104	b += of_read_addr(size, ns);
105	if (a >= b)
106		return 1;
107
108	return 0;
109}
110
111int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna)
112{
113	u32 result[OF_MAX_ADDR_CELLS];
114	int i;
115
116	if (ns > 2) {
117		printk("of_device: Cannot handle size cells (%d) > 2.", ns);
118		return -EINVAL;
119	}
120
121	if (of_out_of_range(addr, range, range + na + pna, na, ns))
122		return -EINVAL;
123
124	/* Start with the parent range base.  */
125	memcpy(result, range + na, pna * 4);
126
127	/* Add in the child address offset.  */
128	for (i = 0; i < na; i++)
129		result[pna - 1 - i] +=
130			(addr[na - 1 - i] -
131			 range[na - 1 - i]);
132
133	memcpy(addr, result, pna * 4);
134
135	return 0;
136}
137
138unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
139{
140	if (flags)
141		return flags;
142	return IORESOURCE_MEM;
143}
144
145/*
146 * SBUS bus specific translator
147 */
148
149int of_bus_sbus_match(struct device_node *np)
150{
151	struct device_node *dp = np;
152
153	while (dp) {
154		if (!strcmp(dp->name, "sbus") ||
155		    !strcmp(dp->name, "sbi"))
156			return 1;
157
158		/* Have a look at use_1to1_mapping().  We're trying
159		 * to match SBUS if that's the top-level bus and we
160		 * don't have some intervening real bus that provides
161		 * ranges based translations.
162		 */
163		if (of_find_property(dp, "ranges", NULL) != NULL)
164			break;
165
166		dp = dp->parent;
167	}
168
169	return 0;
170}
171
172void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)
173{
174	if (addrc)
175		*addrc = 2;
176	if (sizec)
177		*sizec = 1;
178}
179