Commit | Line | Data |
---|---|---|
c9f5b7e7 RR |
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/slab.h> | |
8 | #include <linux/errno.h> | |
9 | #include <linux/irq.h> | |
10 | #include <linux/of_device.h> | |
11 | #include <linux/of_platform.h> | |
12 | ||
13 | #include "of_device_common.h" | |
14 | ||
15 | static int node_match(struct device *dev, void *data) | |
16 | { | |
17 | struct of_device *op = to_of_device(dev); | |
18 | struct device_node *dp = data; | |
19 | ||
20 | return (op->node == dp); | |
21 | } | |
22 | ||
23 | struct of_device *of_find_device_by_node(struct device_node *dp) | |
24 | { | |
25 | struct device *dev = bus_find_device(&of_platform_bus_type, NULL, | |
26 | dp, node_match); | |
27 | ||
28 | if (dev) | |
29 | return to_of_device(dev); | |
30 | ||
31 | return NULL; | |
32 | } | |
33 | EXPORT_SYMBOL(of_find_device_by_node); | |
34 | ||
35 | unsigned int irq_of_parse_and_map(struct device_node *node, int index) | |
36 | { | |
37 | struct of_device *op = of_find_device_by_node(node); | |
38 | ||
39 | if (!op || index >= op->num_irqs) | |
40 | return 0; | |
41 | ||
42 | return op->irqs[index]; | |
43 | } | |
44 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
45 | ||
46 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in | |
47 | * BUS and propagate to all child of_device objects. | |
48 | */ | |
49 | void of_propagate_archdata(struct of_device *bus) | |
50 | { | |
51 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
52 | struct device_node *bus_dp = bus->node; | |
53 | struct device_node *dp; | |
54 | ||
55 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
56 | struct of_device *op = of_find_device_by_node(dp); | |
57 | ||
58 | op->dev.archdata.iommu = bus_sd->iommu; | |
59 | op->dev.archdata.stc = bus_sd->stc; | |
60 | op->dev.archdata.host_controller = bus_sd->host_controller; | |
61 | op->dev.archdata.numa_node = bus_sd->numa_node; | |
62 | ||
63 | if (dp->child) | |
64 | of_propagate_archdata(op); | |
65 | } | |
66 | } | |
67 | ||
68 | struct bus_type of_platform_bus_type; | |
69 | EXPORT_SYMBOL(of_platform_bus_type); | |
70 | ||
71 | static void get_cells(struct device_node *dp, int *addrc, int *sizec) | |
72 | { | |
73 | if (addrc) | |
74 | *addrc = of_n_addr_cells(dp); | |
75 | if (sizec) | |
76 | *sizec = of_n_size_cells(dp); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Default translator (generic bus) | |
81 | */ | |
82 | ||
83 | void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec) | |
84 | { | |
85 | get_cells(dev, addrc, sizec); | |
86 | } | |
87 | ||
88 | /* Make sure the least significant 64-bits are in-range. Even | |
89 | * for 3 or 4 cell values it is a good enough approximation. | |
90 | */ | |
91 | int of_out_of_range(const u32 *addr, const u32 *base, | |
92 | const u32 *size, int na, int ns) | |
93 | { | |
94 | u64 a = of_read_addr(addr, na); | |
95 | u64 b = of_read_addr(base, na); | |
96 | ||
97 | if (a < b) | |
98 | return 1; | |
99 | ||
100 | b += of_read_addr(size, ns); | |
101 | if (a >= b) | |
102 | return 1; | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna) | |
108 | { | |
109 | u32 result[OF_MAX_ADDR_CELLS]; | |
110 | int i; | |
111 | ||
112 | if (ns > 2) { | |
113 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); | |
114 | return -EINVAL; | |
115 | } | |
116 | ||
117 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) | |
118 | return -EINVAL; | |
119 | ||
120 | /* Start with the parent range base. */ | |
121 | memcpy(result, range + na, pna * 4); | |
122 | ||
123 | /* Add in the child address offset. */ | |
124 | for (i = 0; i < na; i++) | |
125 | result[pna - 1 - i] += | |
126 | (addr[na - 1 - i] - | |
127 | range[na - 1 - i]); | |
128 | ||
129 | memcpy(addr, result, pna * 4); | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags) | |
135 | { | |
136 | if (flags) | |
137 | return flags; | |
138 | return IORESOURCE_MEM; | |
139 | } | |
140 | ||
141 | /* | |
142 | * SBUS bus specific translator | |
143 | */ | |
144 | ||
145 | int of_bus_sbus_match(struct device_node *np) | |
146 | { | |
147 | struct device_node *dp = np; | |
148 | ||
149 | while (dp) { | |
150 | if (!strcmp(dp->name, "sbus") || | |
151 | !strcmp(dp->name, "sbi")) | |
152 | return 1; | |
153 | ||
154 | /* Have a look at use_1to1_mapping(). We're trying | |
155 | * to match SBUS if that's the top-level bus and we | |
156 | * don't have some intervening real bus that provides | |
157 | * ranges based translations. | |
158 | */ | |
159 | if (of_find_property(dp, "ranges", NULL) != NULL) | |
160 | break; | |
161 | ||
162 | dp = dp->parent; | |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec) | |
169 | { | |
170 | if (addrc) | |
171 | *addrc = 2; | |
172 | if (sizec) | |
173 | *sizec = 1; | |
174 | } |