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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> | |
8 | #include <linux/of_device.h> | |
9 | #include <linux/of_platform.h> | |
10 | ||
11 | #include "of_device_common.h" | |
12 | ||
c9f5b7e7 RR |
13 | unsigned int irq_of_parse_and_map(struct device_node *node, int index) |
14 | { | |
cd4cd730 | 15 | struct platform_device *op = of_find_device_by_node(node); |
c9f5b7e7 | 16 | |
1636f8ac | 17 | if (!op || index >= op->archdata.num_irqs) |
c9f5b7e7 RR |
18 | return 0; |
19 | ||
1636f8ac | 20 | return op->archdata.irqs[index]; |
c9f5b7e7 RR |
21 | } |
22 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
23 | ||
930952af DM |
24 | int 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 | } | |
35 | EXPORT_SYMBOL_GPL(of_address_to_resource); | |
36 | ||
9889376a DM |
37 | void __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 | } | |
49 | EXPORT_SYMBOL(of_iomap); | |
50 | ||
c9f5b7e7 | 51 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in |
cd4cd730 | 52 | * BUS and propagate to all child platform_device objects. |
c9f5b7e7 | 53 | */ |
cd4cd730 | 54 | void of_propagate_archdata(struct platform_device *bus) |
c9f5b7e7 RR |
55 | { |
56 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
61c7a080 | 57 | struct device_node *bus_dp = bus->dev.of_node; |
c9f5b7e7 RR |
58 | struct device_node *dp; |
59 | ||
60 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
cd4cd730 | 61 | struct platform_device *op = of_find_device_by_node(dp); |
c9f5b7e7 RR |
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 | ||
c9f5b7e7 RR |
73 | static 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 | ||
85 | void 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 | */ | |
93 | int 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 | ||
109 | int 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 | ||
136 | unsigned 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 | ||
147 | int 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 | ||
170 | void 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 | } |