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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> | |
5 | #include <linux/module.h> | |
6 | #include <linux/mod_devicetable.h> | |
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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 | ||
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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) |
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19 | return 0; |
20 | ||
1636f8ac | 21 | return op->archdata.irqs[index]; |
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22 | } |
23 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
24 | ||
25 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in | |
cd4cd730 | 26 | * BUS and propagate to all child platform_device objects. |
c9f5b7e7 | 27 | */ |
cd4cd730 | 28 | void of_propagate_archdata(struct platform_device *bus) |
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29 | { |
30 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
61c7a080 | 31 | struct device_node *bus_dp = bus->dev.of_node; |
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32 | struct device_node *dp; |
33 | ||
34 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
cd4cd730 | 35 | struct platform_device *op = of_find_device_by_node(dp); |
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36 | |
37 | op->dev.archdata.iommu = bus_sd->iommu; | |
38 | op->dev.archdata.stc = bus_sd->stc; | |
39 | op->dev.archdata.host_controller = bus_sd->host_controller; | |
40 | op->dev.archdata.numa_node = bus_sd->numa_node; | |
41 | ||
42 | if (dp->child) | |
43 | of_propagate_archdata(op); | |
44 | } | |
45 | } | |
46 | ||
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47 | static void get_cells(struct device_node *dp, int *addrc, int *sizec) |
48 | { | |
49 | if (addrc) | |
50 | *addrc = of_n_addr_cells(dp); | |
51 | if (sizec) | |
52 | *sizec = of_n_size_cells(dp); | |
53 | } | |
54 | ||
55 | /* | |
56 | * Default translator (generic bus) | |
57 | */ | |
58 | ||
59 | void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec) | |
60 | { | |
61 | get_cells(dev, addrc, sizec); | |
62 | } | |
63 | ||
64 | /* Make sure the least significant 64-bits are in-range. Even | |
65 | * for 3 or 4 cell values it is a good enough approximation. | |
66 | */ | |
67 | int of_out_of_range(const u32 *addr, const u32 *base, | |
68 | const u32 *size, int na, int ns) | |
69 | { | |
70 | u64 a = of_read_addr(addr, na); | |
71 | u64 b = of_read_addr(base, na); | |
72 | ||
73 | if (a < b) | |
74 | return 1; | |
75 | ||
76 | b += of_read_addr(size, ns); | |
77 | if (a >= b) | |
78 | return 1; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna) | |
84 | { | |
85 | u32 result[OF_MAX_ADDR_CELLS]; | |
86 | int i; | |
87 | ||
88 | if (ns > 2) { | |
89 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); | |
90 | return -EINVAL; | |
91 | } | |
92 | ||
93 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) | |
94 | return -EINVAL; | |
95 | ||
96 | /* Start with the parent range base. */ | |
97 | memcpy(result, range + na, pna * 4); | |
98 | ||
99 | /* Add in the child address offset. */ | |
100 | for (i = 0; i < na; i++) | |
101 | result[pna - 1 - i] += | |
102 | (addr[na - 1 - i] - | |
103 | range[na - 1 - i]); | |
104 | ||
105 | memcpy(addr, result, pna * 4); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags) | |
111 | { | |
112 | if (flags) | |
113 | return flags; | |
114 | return IORESOURCE_MEM; | |
115 | } | |
116 | ||
117 | /* | |
118 | * SBUS bus specific translator | |
119 | */ | |
120 | ||
121 | int of_bus_sbus_match(struct device_node *np) | |
122 | { | |
123 | struct device_node *dp = np; | |
124 | ||
125 | while (dp) { | |
126 | if (!strcmp(dp->name, "sbus") || | |
127 | !strcmp(dp->name, "sbi")) | |
128 | return 1; | |
129 | ||
130 | /* Have a look at use_1to1_mapping(). We're trying | |
131 | * to match SBUS if that's the top-level bus and we | |
132 | * don't have some intervening real bus that provides | |
133 | * ranges based translations. | |
134 | */ | |
135 | if (of_find_property(dp, "ranges", NULL) != NULL) | |
136 | break; | |
137 | ||
138 | dp = dp->parent; | |
139 | } | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec) | |
145 | { | |
146 | if (addrc) | |
147 | *addrc = 2; | |
148 | if (sizec) | |
149 | *sizec = 1; | |
150 | } |