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
irq_of_parse_and_map(struct device_node * node,int index)15 unsigned 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 }
24 EXPORT_SYMBOL(irq_of_parse_and_map);
25
of_address_to_resource(struct device_node * node,int index,struct resource * r)26 int 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 }
37 EXPORT_SYMBOL_GPL(of_address_to_resource);
38
of_iomap(struct device_node * node,int index)39 void __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 }
51 EXPORT_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 */
of_propagate_archdata(struct platform_device * bus)56 void 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
get_cells(struct device_node * dp,int * addrc,int * sizec)75 static 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
of_bus_default_count_cells(struct device_node * dev,int * addrc,int * sizec)87 void 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 */
of_out_of_range(const u32 * addr,const u32 * base,const u32 * size,int na,int ns)95 int 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
of_bus_default_map(u32 * addr,const u32 * range,int na,int ns,int pna)111 int 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
of_bus_default_get_flags(const u32 * addr,unsigned long flags)138 unsigned 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
of_bus_sbus_match(struct device_node * np)149 int 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
of_bus_sbus_count_cells(struct device_node * child,int * addrc,int * sizec)172 void 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