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c9f5b7e7 RR |
1 | #include <linux/string.h> |
2 | #include <linux/kernel.h> | |
3 | #include <linux/of.h> | |
066bcaca | 4 | #include <linux/export.h> |
c9f5b7e7 | 5 | #include <linux/mod_devicetable.h> |
c9f5b7e7 RR |
6 | #include <linux/errno.h> |
7 | #include <linux/irq.h> | |
c9f5b7e7 | 8 | #include <linux/of_platform.h> |
985edb5b SR |
9 | #include <linux/of_address.h> |
10 | #include <linux/of_device.h> | |
11 | #include <linux/of_irq.h> | |
c9f5b7e7 RR |
12 | |
13 | #include "of_device_common.h" | |
14 | ||
c9f5b7e7 RR |
15 | unsigned int irq_of_parse_and_map(struct device_node *node, int index) |
16 | { | |
cd4cd730 | 17 | struct platform_device *op = of_find_device_by_node(node); |
c9f5b7e7 | 18 | |
1636f8ac | 19 | if (!op || index >= op->archdata.num_irqs) |
c9f5b7e7 RR |
20 | return 0; |
21 | ||
1636f8ac | 22 | return op->archdata.irqs[index]; |
c9f5b7e7 RR |
23 | } |
24 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
25 | ||
930952af DM |
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 | ||
9889376a DM |
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 | ||
c9f5b7e7 | 53 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in |
cd4cd730 | 54 | * BUS and propagate to all child platform_device objects. |
c9f5b7e7 | 55 | */ |
cd4cd730 | 56 | void of_propagate_archdata(struct platform_device *bus) |
c9f5b7e7 RR |
57 | { |
58 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
61c7a080 | 59 | struct device_node *bus_dp = bus->dev.of_node; |
c9f5b7e7 RR |
60 | struct device_node *dp; |
61 | ||
62 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
cd4cd730 | 63 | struct platform_device *op = of_find_device_by_node(dp); |
c9f5b7e7 RR |
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 | ||
c9f5b7e7 RR |
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 | ||
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 | */ | |
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 | ||
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 | ||
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 | ||
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 | ||
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 | } |