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6494d708 SG |
1 | /* |
2 | * Copyright (c) 2013 Google, Inc | |
3 | * | |
4 | * (C) Copyright 2012 | |
5 | * Pavel Herrmann <morpheus.ibis@gmail.com> | |
6 | * | |
7 | * SPDX-License-Identifier: GPL-2.0+ | |
8 | */ | |
9 | ||
10 | #include <common.h> | |
11 | #include <errno.h> | |
94f7afdf | 12 | #include <fdtdec.h> |
6494d708 | 13 | #include <malloc.h> |
6a6d8fbe | 14 | #include <libfdt.h> |
6494d708 SG |
15 | #include <dm/device.h> |
16 | #include <dm/device-internal.h> | |
17 | #include <dm/lists.h> | |
18 | #include <dm/platdata.h> | |
fd536d81 | 19 | #include <dm/root.h> |
6494d708 SG |
20 | #include <dm/uclass.h> |
21 | #include <dm/util.h> | |
22 | #include <linux/list.h> | |
23 | ||
24 | DECLARE_GLOBAL_DATA_PTR; | |
25 | ||
66eaea6c SR |
26 | struct root_priv { |
27 | fdt_addr_t translation_offset; /* optional translation offset */ | |
28 | }; | |
29 | ||
6494d708 SG |
30 | static const struct driver_info root_info = { |
31 | .name = "root_driver", | |
32 | }; | |
33 | ||
54c5d08a | 34 | struct udevice *dm_root(void) |
6494d708 SG |
35 | { |
36 | if (!gd->dm_root) { | |
37 | dm_warn("Virtual root driver does not exist!\n"); | |
38 | return NULL; | |
39 | } | |
40 | ||
41 | return gd->dm_root; | |
42 | } | |
43 | ||
66eaea6c SR |
44 | fdt_addr_t dm_get_translation_offset(void) |
45 | { | |
46 | struct udevice *root = dm_root(); | |
47 | struct root_priv *priv = dev_get_priv(root); | |
48 | ||
49 | return priv->translation_offset; | |
50 | } | |
51 | ||
52 | void dm_set_translation_offset(fdt_addr_t offs) | |
53 | { | |
54 | struct udevice *root = dm_root(); | |
55 | struct root_priv *priv = dev_get_priv(root); | |
56 | ||
57 | priv->translation_offset = offs; | |
58 | } | |
59 | ||
484fdf5b MS |
60 | #if defined(CONFIG_NEEDS_MANUAL_RELOC) |
61 | void fix_drivers(void) | |
62 | { | |
63 | struct driver *drv = | |
64 | ll_entry_start(struct driver, driver); | |
65 | const int n_ents = ll_entry_count(struct driver, driver); | |
66 | struct driver *entry; | |
67 | ||
68 | for (entry = drv; entry != drv + n_ents; entry++) { | |
69 | if (entry->of_match) | |
70 | entry->of_match = (const struct udevice_id *) | |
71 | ((u32)entry->of_match + gd->reloc_off); | |
72 | if (entry->bind) | |
73 | entry->bind += gd->reloc_off; | |
74 | if (entry->probe) | |
75 | entry->probe += gd->reloc_off; | |
76 | if (entry->remove) | |
77 | entry->remove += gd->reloc_off; | |
78 | if (entry->unbind) | |
79 | entry->unbind += gd->reloc_off; | |
80 | if (entry->ofdata_to_platdata) | |
81 | entry->ofdata_to_platdata += gd->reloc_off; | |
31e1029a MS |
82 | if (entry->child_post_bind) |
83 | entry->child_post_bind += gd->reloc_off; | |
484fdf5b MS |
84 | if (entry->child_pre_probe) |
85 | entry->child_pre_probe += gd->reloc_off; | |
86 | if (entry->child_post_remove) | |
87 | entry->child_post_remove += gd->reloc_off; | |
88 | /* OPS are fixed in every uclass post_probe function */ | |
89 | if (entry->ops) | |
90 | entry->ops += gd->reloc_off; | |
91 | } | |
92 | } | |
93 | ||
94 | void fix_uclass(void) | |
95 | { | |
96 | struct uclass_driver *uclass = | |
97 | ll_entry_start(struct uclass_driver, uclass); | |
98 | const int n_ents = ll_entry_count(struct uclass_driver, uclass); | |
99 | struct uclass_driver *entry; | |
100 | ||
101 | for (entry = uclass; entry != uclass + n_ents; entry++) { | |
102 | if (entry->post_bind) | |
103 | entry->post_bind += gd->reloc_off; | |
104 | if (entry->pre_unbind) | |
105 | entry->pre_unbind += gd->reloc_off; | |
31e1029a MS |
106 | if (entry->pre_probe) |
107 | entry->pre_probe += gd->reloc_off; | |
484fdf5b MS |
108 | if (entry->post_probe) |
109 | entry->post_probe += gd->reloc_off; | |
110 | if (entry->pre_remove) | |
111 | entry->pre_remove += gd->reloc_off; | |
31e1029a MS |
112 | if (entry->child_post_bind) |
113 | entry->child_post_bind += gd->reloc_off; | |
114 | if (entry->child_pre_probe) | |
115 | entry->child_pre_probe += gd->reloc_off; | |
484fdf5b MS |
116 | if (entry->init) |
117 | entry->init += gd->reloc_off; | |
118 | if (entry->destroy) | |
119 | entry->destroy += gd->reloc_off; | |
120 | /* FIXME maybe also need to fix these ops */ | |
121 | if (entry->ops) | |
122 | entry->ops += gd->reloc_off; | |
123 | } | |
124 | } | |
125 | #endif | |
126 | ||
6494d708 SG |
127 | int dm_init(void) |
128 | { | |
129 | int ret; | |
130 | ||
131 | if (gd->dm_root) { | |
132 | dm_warn("Virtual root driver already exists!\n"); | |
133 | return -EINVAL; | |
134 | } | |
89876a55 | 135 | INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST); |
6494d708 | 136 | |
484fdf5b MS |
137 | #if defined(CONFIG_NEEDS_MANUAL_RELOC) |
138 | fix_drivers(); | |
139 | fix_uclass(); | |
140 | #endif | |
141 | ||
00606d7e | 142 | ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST); |
7497812d SG |
143 | if (ret) |
144 | return ret; | |
0f925822 | 145 | #if CONFIG_IS_ENABLED(OF_CONTROL) |
2f3b95db SG |
146 | DM_ROOT_NON_CONST->of_offset = 0; |
147 | #endif | |
7497812d | 148 | ret = device_probe(DM_ROOT_NON_CONST); |
6494d708 SG |
149 | if (ret) |
150 | return ret; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
9adbd7a1 SG |
155 | int dm_uninit(void) |
156 | { | |
157 | device_remove(dm_root()); | |
158 | device_unbind(dm_root()); | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
00606d7e | 163 | int dm_scan_platdata(bool pre_reloc_only) |
6494d708 SG |
164 | { |
165 | int ret; | |
166 | ||
00606d7e | 167 | ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only); |
6494d708 SG |
168 | if (ret == -ENOENT) { |
169 | dm_warn("Some drivers were not found\n"); | |
170 | ret = 0; | |
171 | } | |
6494d708 | 172 | |
cbf86d71 | 173 | return ret; |
6494d708 SG |
174 | } |
175 | ||
0f925822 | 176 | #if CONFIG_IS_ENABLED(OF_CONTROL) |
1ca7e206 SG |
177 | int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset, |
178 | bool pre_reloc_only) | |
6494d708 | 179 | { |
6494d708 | 180 | int ret = 0, err; |
1ca7e206 SG |
181 | |
182 | for (offset = fdt_first_subnode(blob, offset); | |
183 | offset > 0; | |
184 | offset = fdt_next_subnode(blob, offset)) { | |
185 | if (pre_reloc_only && | |
186 | !fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL)) | |
187 | continue; | |
94f7afdf SG |
188 | if (!fdtdec_get_is_enabled(blob, offset)) { |
189 | dm_dbg(" - ignoring disabled device\n"); | |
190 | continue; | |
191 | } | |
1f359e36 | 192 | err = lists_bind_fdt(parent, blob, offset, NULL); |
bc7b2f43 | 193 | if (err && !ret) { |
1ca7e206 | 194 | ret = err; |
bc7b2f43 SG |
195 | debug("%s: ret=%d\n", fdt_get_name(blob, offset, NULL), |
196 | ret); | |
197 | } | |
1ca7e206 | 198 | } |
6494d708 SG |
199 | |
200 | if (ret) | |
201 | dm_warn("Some drivers failed to bind\n"); | |
202 | ||
203 | return ret; | |
204 | } | |
1ca7e206 SG |
205 | |
206 | int dm_scan_fdt(const void *blob, bool pre_reloc_only) | |
207 | { | |
208 | return dm_scan_fdt_node(gd->dm_root, blob, 0, pre_reloc_only); | |
209 | } | |
6494d708 SG |
210 | #endif |
211 | ||
bb58503d SG |
212 | __weak int dm_scan_other(bool pre_reloc_only) |
213 | { | |
214 | return 0; | |
215 | } | |
216 | ||
ab7cd627 SG |
217 | int dm_init_and_scan(bool pre_reloc_only) |
218 | { | |
219 | int ret; | |
220 | ||
221 | ret = dm_init(); | |
222 | if (ret) { | |
223 | debug("dm_init() failed: %d\n", ret); | |
224 | return ret; | |
225 | } | |
226 | ret = dm_scan_platdata(pre_reloc_only); | |
227 | if (ret) { | |
228 | debug("dm_scan_platdata() failed: %d\n", ret); | |
229 | return ret; | |
230 | } | |
b2b0d3e7 | 231 | |
0f925822 | 232 | if (CONFIG_IS_ENABLED(OF_CONTROL)) { |
b2b0d3e7 SG |
233 | ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only); |
234 | if (ret) { | |
235 | debug("dm_scan_fdt() failed: %d\n", ret); | |
236 | return ret; | |
237 | } | |
ab7cd627 | 238 | } |
b2b0d3e7 | 239 | |
bb58503d SG |
240 | ret = dm_scan_other(pre_reloc_only); |
241 | if (ret) | |
242 | return ret; | |
ab7cd627 SG |
243 | |
244 | return 0; | |
245 | } | |
246 | ||
6494d708 SG |
247 | /* This is the root driver - all drivers are children of this */ |
248 | U_BOOT_DRIVER(root_driver) = { | |
249 | .name = "root_driver", | |
250 | .id = UCLASS_ROOT, | |
66eaea6c | 251 | .priv_auto_alloc_size = sizeof(struct root_priv), |
6494d708 SG |
252 | }; |
253 | ||
254 | /* This is the root uclass */ | |
255 | UCLASS_DRIVER(root) = { | |
256 | .name = "root", | |
257 | .id = UCLASS_ROOT, | |
258 | }; |