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
|
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/errno.h>
#include <linux/irq.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include "of_device_common.h"
static int node_match(struct device *dev, void *data)
{
struct of_device *op = to_of_device(dev);
struct device_node *dp = data;
return (op->node == dp);
}
struct of_device *of_find_device_by_node(struct device_node *dp)
{
struct device *dev = bus_find_device(&of_platform_bus_type, NULL,
dp, node_match);
if (dev)
return to_of_device(dev);
return NULL;
}
EXPORT_SYMBOL(of_find_device_by_node);
unsigned int irq_of_parse_and_map(struct device_node *node, int index)
{
struct of_device *op = of_find_device_by_node(node);
if (!op || index >= op->num_irqs)
return 0;
return op->irqs[index];
}
EXPORT_SYMBOL(irq_of_parse_and_map);
/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
* BUS and propagate to all child of_device objects.
*/
void of_propagate_archdata(struct of_device *bus)
{
struct dev_archdata *bus_sd = &bus->dev.archdata;
struct device_node *bus_dp = bus->node;
struct device_node *dp;
for (dp = bus_dp->child; dp; dp = dp->sibling) {
struct of_device *op = of_find_device_by_node(dp);
op->dev.archdata.iommu = bus_sd->iommu;
op->dev.archdata.stc = bus_sd->stc;
op->dev.archdata.host_controller = bus_sd->host_controller;
op->dev.archdata.numa_node = bus_sd->numa_node;
if (dp->child)
of_propagate_archdata(op);
}
}
struct bus_type of_platform_bus_type;
EXPORT_SYMBOL(of_platform_bus_type);
static void get_cells(struct device_node *dp, int *addrc, int *sizec)
{
if (addrc)
*addrc = of_n_addr_cells(dp);
if (sizec)
*sizec = of_n_size_cells(dp);
}
/*
* Default translator (generic bus)
*/
void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
{
get_cells(dev, addrc, sizec);
}
/* Make sure the least significant 64-bits are in-range. Even
* for 3 or 4 cell values it is a good enough approximation.
*/
int of_out_of_range(const u32 *addr, const u32 *base,
const u32 *size, int na, int ns)
{
u64 a = of_read_addr(addr, na);
u64 b = of_read_addr(base, na);
if (a < b)
return 1;
b += of_read_addr(size, ns);
if (a >= b)
return 1;
return 0;
}
int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna)
{
u32 result[OF_MAX_ADDR_CELLS];
int i;
if (ns > 2) {
printk("of_device: Cannot handle size cells (%d) > 2.", ns);
return -EINVAL;
}
if (of_out_of_range(addr, range, range + na + pna, na, ns))
return -EINVAL;
/* Start with the parent range base. */
memcpy(result, range + na, pna * 4);
/* Add in the child address offset. */
for (i = 0; i < na; i++)
result[pna - 1 - i] +=
(addr[na - 1 - i] -
range[na - 1 - i]);
memcpy(addr, result, pna * 4);
return 0;
}
unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
{
if (flags)
return flags;
return IORESOURCE_MEM;
}
/*
* SBUS bus specific translator
*/
int of_bus_sbus_match(struct device_node *np)
{
struct device_node *dp = np;
while (dp) {
if (!strcmp(dp->name, "sbus") ||
!strcmp(dp->name, "sbi"))
return 1;
/* Have a look at use_1to1_mapping(). We're trying
* to match SBUS if that's the top-level bus and we
* don't have some intervening real bus that provides
* ranges based translations.
*/
if (of_find_property(dp, "ranges", NULL) != NULL)
break;
dp = dp->parent;
}
return 0;
}
void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)
{
if (addrc)
*addrc = 2;
if (sizec)
*sizec = 1;
}
|
