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c9f5b7e7 RR |
1 | #include <linux/string.h> |
2 | #include <linux/kernel.h> | |
3 | #include <linux/of.h> | |
4 | #include <linux/init.h> | |
066bcaca | 5 | #include <linux/export.h> |
c9f5b7e7 | 6 | #include <linux/mod_devicetable.h> |
c9f5b7e7 RR |
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 | ||
c9f5b7e7 RR |
14 | unsigned int irq_of_parse_and_map(struct device_node *node, int index) |
15 | { | |
cd4cd730 | 16 | struct platform_device *op = of_find_device_by_node(node); |
c9f5b7e7 | 17 | |
1636f8ac | 18 | if (!op || index >= op->archdata.num_irqs) |
c9f5b7e7 RR |
19 | return 0; |
20 | ||
1636f8ac | 21 | return op->archdata.irqs[index]; |
c9f5b7e7 RR |
22 | } |
23 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
24 | ||
930952af DM |
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 | ||
9889376a DM |
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 | ||
c9f5b7e7 | 52 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in |
cd4cd730 | 53 | * BUS and propagate to all child platform_device objects. |
c9f5b7e7 | 54 | */ |
cd4cd730 | 55 | void of_propagate_archdata(struct platform_device *bus) |
c9f5b7e7 RR |
56 | { |
57 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
61c7a080 | 58 | struct device_node *bus_dp = bus->dev.of_node; |
c9f5b7e7 RR |
59 | struct device_node *dp; |
60 | ||
61 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
cd4cd730 | 62 | struct platform_device *op = of_find_device_by_node(dp); |
c9f5b7e7 RR |
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 | ||
c9f5b7e7 RR |
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 | ||
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 | */ | |
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 | ||
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 | ||
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 | ||
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 | ||
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 | } |