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