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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | #include <linux/string.h> |
3 | #include <linux/kernel.h> | |
4 | #include <linux/of.h> | |
066bcaca | 5 | #include <linux/export.h> |
c9f5b7e7 | 6 | #include <linux/mod_devicetable.h> |
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7 | #include <linux/errno.h> |
8 | #include <linux/irq.h> | |
c9f5b7e7 | 9 | #include <linux/of_platform.h> |
985edb5b SR |
10 | #include <linux/of_address.h> |
11 | #include <linux/of_device.h> | |
12 | #include <linux/of_irq.h> | |
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13 | |
14 | #include "of_device_common.h" | |
15 | ||
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16 | unsigned int irq_of_parse_and_map(struct device_node *node, int index) |
17 | { | |
cd4cd730 | 18 | struct platform_device *op = of_find_device_by_node(node); |
c9f5b7e7 | 19 | |
1636f8ac | 20 | if (!op || index >= op->archdata.num_irqs) |
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21 | return 0; |
22 | ||
1636f8ac | 23 | return op->archdata.irqs[index]; |
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24 | } |
25 | EXPORT_SYMBOL(irq_of_parse_and_map); | |
26 | ||
930952af DM |
27 | int of_address_to_resource(struct device_node *node, int index, |
28 | struct resource *r) | |
29 | { | |
30 | struct platform_device *op = of_find_device_by_node(node); | |
31 | ||
32 | if (!op || index >= op->num_resources) | |
33 | return -EINVAL; | |
34 | ||
35 | memcpy(r, &op->archdata.resource[index], sizeof(*r)); | |
36 | return 0; | |
37 | } | |
38 | EXPORT_SYMBOL_GPL(of_address_to_resource); | |
39 | ||
9889376a DM |
40 | void __iomem *of_iomap(struct device_node *node, int index) |
41 | { | |
42 | struct platform_device *op = of_find_device_by_node(node); | |
43 | struct resource *r; | |
44 | ||
45 | if (!op || index >= op->num_resources) | |
46 | return NULL; | |
47 | ||
48 | r = &op->archdata.resource[index]; | |
49 | ||
50 | return of_ioremap(r, 0, resource_size(r), (char *) r->name); | |
51 | } | |
52 | EXPORT_SYMBOL(of_iomap); | |
53 | ||
c9f5b7e7 | 54 | /* Take the archdata values for IOMMU, STC, and HOSTDATA found in |
cd4cd730 | 55 | * BUS and propagate to all child platform_device objects. |
c9f5b7e7 | 56 | */ |
cd4cd730 | 57 | void of_propagate_archdata(struct platform_device *bus) |
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58 | { |
59 | struct dev_archdata *bus_sd = &bus->dev.archdata; | |
61c7a080 | 60 | struct device_node *bus_dp = bus->dev.of_node; |
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61 | struct device_node *dp; |
62 | ||
63 | for (dp = bus_dp->child; dp; dp = dp->sibling) { | |
cd4cd730 | 64 | struct platform_device *op = of_find_device_by_node(dp); |
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65 | |
66 | op->dev.archdata.iommu = bus_sd->iommu; | |
67 | op->dev.archdata.stc = bus_sd->stc; | |
68 | op->dev.archdata.host_controller = bus_sd->host_controller; | |
69 | op->dev.archdata.numa_node = bus_sd->numa_node; | |
255a69a9 | 70 | op->dev.dma_ops = bus->dev.dma_ops; |
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71 | |
72 | if (dp->child) | |
73 | of_propagate_archdata(op); | |
74 | } | |
75 | } | |
76 | ||
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77 | static void get_cells(struct device_node *dp, int *addrc, int *sizec) |
78 | { | |
79 | if (addrc) | |
80 | *addrc = of_n_addr_cells(dp); | |
81 | if (sizec) | |
82 | *sizec = of_n_size_cells(dp); | |
83 | } | |
84 | ||
85 | /* | |
86 | * Default translator (generic bus) | |
87 | */ | |
88 | ||
89 | void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec) | |
90 | { | |
91 | get_cells(dev, addrc, sizec); | |
92 | } | |
93 | ||
94 | /* Make sure the least significant 64-bits are in-range. Even | |
95 | * for 3 or 4 cell values it is a good enough approximation. | |
96 | */ | |
97 | int of_out_of_range(const u32 *addr, const u32 *base, | |
98 | const u32 *size, int na, int ns) | |
99 | { | |
100 | u64 a = of_read_addr(addr, na); | |
101 | u64 b = of_read_addr(base, na); | |
102 | ||
103 | if (a < b) | |
104 | return 1; | |
105 | ||
106 | b += of_read_addr(size, ns); | |
107 | if (a >= b) | |
108 | return 1; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna) | |
114 | { | |
115 | u32 result[OF_MAX_ADDR_CELLS]; | |
116 | int i; | |
117 | ||
118 | if (ns > 2) { | |
119 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) | |
124 | return -EINVAL; | |
125 | ||
126 | /* Start with the parent range base. */ | |
127 | memcpy(result, range + na, pna * 4); | |
128 | ||
129 | /* Add in the child address offset. */ | |
130 | for (i = 0; i < na; i++) | |
131 | result[pna - 1 - i] += | |
132 | (addr[na - 1 - i] - | |
133 | range[na - 1 - i]); | |
134 | ||
135 | memcpy(addr, result, pna * 4); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags) | |
141 | { | |
142 | if (flags) | |
143 | return flags; | |
144 | return IORESOURCE_MEM; | |
145 | } | |
146 | ||
147 | /* | |
148 | * SBUS bus specific translator | |
149 | */ | |
150 | ||
151 | int of_bus_sbus_match(struct device_node *np) | |
152 | { | |
153 | struct device_node *dp = np; | |
154 | ||
155 | while (dp) { | |
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156 | if (of_node_name_eq(dp, "sbus") || |
157 | of_node_name_eq(dp, "sbi")) | |
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158 | return 1; |
159 | ||
160 | /* Have a look at use_1to1_mapping(). We're trying | |
161 | * to match SBUS if that's the top-level bus and we | |
162 | * don't have some intervening real bus that provides | |
163 | * ranges based translations. | |
164 | */ | |
6a71ca74 | 165 | if (of_property_present(dp, "ranges")) |
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166 | break; |
167 | ||
168 | dp = dp->parent; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec) | |
175 | { | |
176 | if (addrc) | |
177 | *addrc = 2; | |
178 | if (sizec) | |
179 | *sizec = 1; | |
180 | } |