1 #include <linux/string.h>
2 #include <linux/kernel.h>
3 #include <linux/of.h>
4 #include <linux/init.h>
5 #include <linux/module.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
irq_of_parse_and_map(struct device_node * node,int index)14 unsigned 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 }
23 EXPORT_SYMBOL(irq_of_parse_and_map);
24
of_address_to_resource(struct device_node * node,int index,struct resource * r)25 int 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 }
36 EXPORT_SYMBOL_GPL(of_address_to_resource);
37
of_iomap(struct device_node * node,int index)38 void __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 }
50 EXPORT_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 */
of_propagate_archdata(struct platform_device * bus)55 void 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
get_cells(struct device_node * dp,int * addrc,int * sizec)74 static 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
of_bus_default_count_cells(struct device_node * dev,int * addrc,int * sizec)86 void 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 */
of_out_of_range(const u32 * addr,const u32 * base,const u32 * size,int na,int ns)94 int 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
of_bus_default_map(u32 * addr,const u32 * range,int na,int ns,int pna)110 int 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
of_bus_default_get_flags(const u32 * addr,unsigned long flags)137 unsigned 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
of_bus_sbus_match(struct device_node * np)148 int 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
of_bus_sbus_count_cells(struct device_node * child,int * addrc,int * sizec)171 void 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 }
178