1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
/*
* Copyright (c) 2013 Google, Inc
*
* (C) Copyright 2012
* Pavel Herrmann <morpheus.ibis@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <libfdt.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/platdata.h>
#include <dm/root.h>
#include <dm/uclass.h>
#include <dm/util.h>
#include <linux/list.h>
DECLARE_GLOBAL_DATA_PTR;
struct root_priv {
fdt_addr_t translation_offset; /* optional translation offset */
};
static const struct driver_info root_info = {
.name = "root_driver",
};
struct udevice *dm_root(void)
{
if (!gd->dm_root) {
dm_warn("Virtual root driver does not exist!\n");
return NULL;
}
return gd->dm_root;
}
fdt_addr_t dm_get_translation_offset(void)
{
struct udevice *root = dm_root();
struct root_priv *priv = dev_get_priv(root);
return priv->translation_offset;
}
void dm_set_translation_offset(fdt_addr_t offs)
{
struct udevice *root = dm_root();
struct root_priv *priv = dev_get_priv(root);
priv->translation_offset = offs;
}
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
void fix_drivers(void)
{
struct driver *drv =
ll_entry_start(struct driver, driver);
const int n_ents = ll_entry_count(struct driver, driver);
struct driver *entry;
for (entry = drv; entry != drv + n_ents; entry++) {
if (entry->of_match)
entry->of_match = (const struct udevice_id *)
((u32)entry->of_match + gd->reloc_off);
if (entry->bind)
entry->bind += gd->reloc_off;
if (entry->probe)
entry->probe += gd->reloc_off;
if (entry->remove)
entry->remove += gd->reloc_off;
if (entry->unbind)
entry->unbind += gd->reloc_off;
if (entry->ofdata_to_platdata)
entry->ofdata_to_platdata += gd->reloc_off;
if (entry->child_post_bind)
entry->child_post_bind += gd->reloc_off;
if (entry->child_pre_probe)
entry->child_pre_probe += gd->reloc_off;
if (entry->child_post_remove)
entry->child_post_remove += gd->reloc_off;
/* OPS are fixed in every uclass post_probe function */
if (entry->ops)
entry->ops += gd->reloc_off;
}
}
void fix_uclass(void)
{
struct uclass_driver *uclass =
ll_entry_start(struct uclass_driver, uclass);
const int n_ents = ll_entry_count(struct uclass_driver, uclass);
struct uclass_driver *entry;
for (entry = uclass; entry != uclass + n_ents; entry++) {
if (entry->post_bind)
entry->post_bind += gd->reloc_off;
if (entry->pre_unbind)
entry->pre_unbind += gd->reloc_off;
if (entry->pre_probe)
entry->pre_probe += gd->reloc_off;
if (entry->post_probe)
entry->post_probe += gd->reloc_off;
if (entry->pre_remove)
entry->pre_remove += gd->reloc_off;
if (entry->child_post_bind)
entry->child_post_bind += gd->reloc_off;
if (entry->child_pre_probe)
entry->child_pre_probe += gd->reloc_off;
if (entry->init)
entry->init += gd->reloc_off;
if (entry->destroy)
entry->destroy += gd->reloc_off;
/* FIXME maybe also need to fix these ops */
if (entry->ops)
entry->ops += gd->reloc_off;
}
}
#endif
int dm_init(void)
{
int ret;
if (gd->dm_root) {
dm_warn("Virtual root driver already exists!\n");
return -EINVAL;
}
INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST);
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
fix_drivers();
fix_uclass();
#endif
ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
if (ret)
return ret;
#if CONFIG_IS_ENABLED(OF_CONTROL)
DM_ROOT_NON_CONST->of_offset = 0;
#endif
ret = device_probe(DM_ROOT_NON_CONST);
if (ret)
return ret;
return 0;
}
int dm_uninit(void)
{
device_remove(dm_root());
device_unbind(dm_root());
return 0;
}
int dm_scan_platdata(bool pre_reloc_only)
{
int ret;
ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only);
if (ret == -ENOENT) {
dm_warn("Some drivers were not found\n");
ret = 0;
}
return ret;
}
#if CONFIG_IS_ENABLED(OF_CONTROL)
int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset,
bool pre_reloc_only)
{
int ret = 0, err;
for (offset = fdt_first_subnode(blob, offset);
offset > 0;
offset = fdt_next_subnode(blob, offset)) {
if (pre_reloc_only &&
!fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL))
continue;
if (!fdtdec_get_is_enabled(blob, offset)) {
dm_dbg(" - ignoring disabled device\n");
continue;
}
err = lists_bind_fdt(parent, blob, offset, NULL);
if (err && !ret) {
ret = err;
debug("%s: ret=%d\n", fdt_get_name(blob, offset, NULL),
ret);
}
}
if (ret)
dm_warn("Some drivers failed to bind\n");
return ret;
}
int dm_scan_fdt(const void *blob, bool pre_reloc_only)
{
return dm_scan_fdt_node(gd->dm_root, blob, 0, pre_reloc_only);
}
#endif
__weak int dm_scan_other(bool pre_reloc_only)
{
return 0;
}
int dm_init_and_scan(bool pre_reloc_only)
{
int ret;
ret = dm_init();
if (ret) {
debug("dm_init() failed: %d\n", ret);
return ret;
}
ret = dm_scan_platdata(pre_reloc_only);
if (ret) {
debug("dm_scan_platdata() failed: %d\n", ret);
return ret;
}
if (CONFIG_IS_ENABLED(OF_CONTROL)) {
ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
if (ret) {
debug("dm_scan_fdt() failed: %d\n", ret);
return ret;
}
}
ret = dm_scan_other(pre_reloc_only);
if (ret)
return ret;
return 0;
}
/* This is the root driver - all drivers are children of this */
U_BOOT_DRIVER(root_driver) = {
.name = "root_driver",
.id = UCLASS_ROOT,
.priv_auto_alloc_size = sizeof(struct root_priv),
};
/* This is the root uclass */
UCLASS_DRIVER(root) = {
.name = "root",
.id = UCLASS_ROOT,
};
|
