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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 | ||
14 | static int node_match(struct device *dev, void *data) | |
15 | { | |
cd4cd730 | 16 | struct platform_device *op = to_platform_device(dev); |
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17 | struct device_node *dp = data; |
18 | ||
61c7a080 | 19 | return (op->dev.of_node == dp); |
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20 | } |
21 | ||
cd4cd730 | 22 | struct platform_device *of_find_device_by_node(struct device_node *dp) |
c9f5b7e7 | 23 | { |
1ab1d63a | 24 | struct device *dev = bus_find_device(&platform_bus_type, NULL, |
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25 | dp, node_match); |
26 | ||
27 | if (dev) | |
cd4cd730 | 28 | return to_platform_device(dev); |
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29 | |
30 | return NULL; | |
31 | } | |
32 | EXPORT_SYMBOL(of_find_device_by_node); | |
33 | ||
34 | unsigned int irq_of_parse_and_map(struct device_node *node, int index) | |
35 | { | |
cd4cd730 | 36 | struct platform_device *op = of_find_device_by_node(node); |
c9f5b7e7 | 37 | |
1636f8ac | 38 | if (!op || index >= op->archdata.num_irqs) |
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39 | return 0; |
40 | ||
1636f8ac | 41 | return op->archdata.irqs[index]; |
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42 | } |
43 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
44 | ||
45 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in | |
cd4cd730 | 46 | * BUS and propagate to all child platform_device objects. |
c9f5b7e7 | 47 | */ |
cd4cd730 | 48 | void of_propagate_archdata(struct platform_device *bus) |
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49 | { |
50 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
61c7a080 | 51 | struct device_node *bus_dp = bus->dev.of_node; |
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52 | struct device_node *dp; |
53 | ||
54 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
cd4cd730 | 55 | struct platform_device *op = of_find_device_by_node(dp); |
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56 | |
57 | op->dev.archdata.iommu = bus_sd->iommu; | |
58 | op->dev.archdata.stc = bus_sd->stc; | |
59 | op->dev.archdata.host_controller = bus_sd->host_controller; | |
60 | op->dev.archdata.numa_node = bus_sd->numa_node; | |
61 | ||
62 | if (dp->child) | |
63 | of_propagate_archdata(op); | |
64 | } | |
65 | } | |
66 | ||
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67 | static void get_cells(struct device_node *dp, int *addrc, int *sizec) |
68 | { | |
69 | if (addrc) | |
70 | *addrc = of_n_addr_cells(dp); | |
71 | if (sizec) | |
72 | *sizec = of_n_size_cells(dp); | |
73 | } | |
74 | ||
75 | /* | |
76 | * Default translator (generic bus) | |
77 | */ | |
78 | ||
79 | void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec) | |
80 | { | |
81 | get_cells(dev, addrc, sizec); | |
82 | } | |
83 | ||
84 | /* Make sure the least significant 64-bits are in-range. Even | |
85 | * for 3 or 4 cell values it is a good enough approximation. | |
86 | */ | |
87 | int of_out_of_range(const u32 *addr, const u32 *base, | |
88 | const u32 *size, int na, int ns) | |
89 | { | |
90 | u64 a = of_read_addr(addr, na); | |
91 | u64 b = of_read_addr(base, na); | |
92 | ||
93 | if (a < b) | |
94 | return 1; | |
95 | ||
96 | b += of_read_addr(size, ns); | |
97 | if (a >= b) | |
98 | return 1; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna) | |
104 | { | |
105 | u32 result[OF_MAX_ADDR_CELLS]; | |
106 | int i; | |
107 | ||
108 | if (ns > 2) { | |
109 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); | |
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) | |
114 | return -EINVAL; | |
115 | ||
116 | /* Start with the parent range base. */ | |
117 | memcpy(result, range + na, pna * 4); | |
118 | ||
119 | /* Add in the child address offset. */ | |
120 | for (i = 0; i < na; i++) | |
121 | result[pna - 1 - i] += | |
122 | (addr[na - 1 - i] - | |
123 | range[na - 1 - i]); | |
124 | ||
125 | memcpy(addr, result, pna * 4); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags) | |
131 | { | |
132 | if (flags) | |
133 | return flags; | |
134 | return IORESOURCE_MEM; | |
135 | } | |
136 | ||
137 | /* | |
138 | * SBUS bus specific translator | |
139 | */ | |
140 | ||
141 | int of_bus_sbus_match(struct device_node *np) | |
142 | { | |
143 | struct device_node *dp = np; | |
144 | ||
145 | while (dp) { | |
146 | if (!strcmp(dp->name, "sbus") || | |
147 | !strcmp(dp->name, "sbi")) | |
148 | return 1; | |
149 | ||
150 | /* Have a look at use_1to1_mapping(). We're trying | |
151 | * to match SBUS if that's the top-level bus and we | |
152 | * don't have some intervening real bus that provides | |
153 | * ranges based translations. | |
154 | */ | |
155 | if (of_find_property(dp, "ranges", NULL) != NULL) | |
156 | break; | |
157 | ||
158 | dp = dp->parent; | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec) | |
165 | { | |
166 | if (addrc) | |
167 | *addrc = 2; | |
168 | if (sizec) | |
169 | *sizec = 1; | |
170 | } |