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