]> git.sur5r.net Git - u-boot/blob - drivers/core/root.c
dm: core: Add dm_remove_devices_flags() and hook it into device_remove()
[u-boot] / drivers / core / root.c
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>
12 #include <fdtdec.h>
13 #include <malloc.h>
14 #include <libfdt.h>
15 #include <dm/device.h>
16 #include <dm/device-internal.h>
17 #include <dm/lists.h>
18 #include <dm/platdata.h>
19 #include <dm/root.h>
20 #include <dm/uclass.h>
21 #include <dm/util.h>
22 #include <linux/list.h>
23
24 DECLARE_GLOBAL_DATA_PTR;
25
26 struct root_priv {
27         fdt_addr_t translation_offset;  /* optional translation offset */
28 };
29
30 static const struct driver_info root_info = {
31         .name           = "root_driver",
32 };
33
34 struct udevice *dm_root(void)
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
44 void dm_fixup_for_gd_move(struct global_data *new_gd)
45 {
46         /* The sentinel node has moved, so update things that point to it */
47         if (gd->dm_root) {
48                 new_gd->uclass_root.next->prev = &new_gd->uclass_root;
49                 new_gd->uclass_root.prev->next = &new_gd->uclass_root;
50         }
51 }
52
53 fdt_addr_t dm_get_translation_offset(void)
54 {
55         struct udevice *root = dm_root();
56         struct root_priv *priv = dev_get_priv(root);
57
58         return priv->translation_offset;
59 }
60
61 void dm_set_translation_offset(fdt_addr_t offs)
62 {
63         struct udevice *root = dm_root();
64         struct root_priv *priv = dev_get_priv(root);
65
66         priv->translation_offset = offs;
67 }
68
69 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
70 void fix_drivers(void)
71 {
72         struct driver *drv =
73                 ll_entry_start(struct driver, driver);
74         const int n_ents = ll_entry_count(struct driver, driver);
75         struct driver *entry;
76
77         for (entry = drv; entry != drv + n_ents; entry++) {
78                 if (entry->of_match)
79                         entry->of_match = (const struct udevice_id *)
80                                 ((u32)entry->of_match + gd->reloc_off);
81                 if (entry->bind)
82                         entry->bind += gd->reloc_off;
83                 if (entry->probe)
84                         entry->probe += gd->reloc_off;
85                 if (entry->remove)
86                         entry->remove += gd->reloc_off;
87                 if (entry->unbind)
88                         entry->unbind += gd->reloc_off;
89                 if (entry->ofdata_to_platdata)
90                         entry->ofdata_to_platdata += gd->reloc_off;
91                 if (entry->child_post_bind)
92                         entry->child_post_bind += gd->reloc_off;
93                 if (entry->child_pre_probe)
94                         entry->child_pre_probe += gd->reloc_off;
95                 if (entry->child_post_remove)
96                         entry->child_post_remove += gd->reloc_off;
97                 /* OPS are fixed in every uclass post_probe function */
98                 if (entry->ops)
99                         entry->ops += gd->reloc_off;
100         }
101 }
102
103 void fix_uclass(void)
104 {
105         struct uclass_driver *uclass =
106                 ll_entry_start(struct uclass_driver, uclass);
107         const int n_ents = ll_entry_count(struct uclass_driver, uclass);
108         struct uclass_driver *entry;
109
110         for (entry = uclass; entry != uclass + n_ents; entry++) {
111                 if (entry->post_bind)
112                         entry->post_bind += gd->reloc_off;
113                 if (entry->pre_unbind)
114                         entry->pre_unbind += gd->reloc_off;
115                 if (entry->pre_probe)
116                         entry->pre_probe += gd->reloc_off;
117                 if (entry->post_probe)
118                         entry->post_probe += gd->reloc_off;
119                 if (entry->pre_remove)
120                         entry->pre_remove += gd->reloc_off;
121                 if (entry->child_post_bind)
122                         entry->child_post_bind += gd->reloc_off;
123                 if (entry->child_pre_probe)
124                         entry->child_pre_probe += gd->reloc_off;
125                 if (entry->init)
126                         entry->init += gd->reloc_off;
127                 if (entry->destroy)
128                         entry->destroy += gd->reloc_off;
129                 /* FIXME maybe also need to fix these ops */
130                 if (entry->ops)
131                         entry->ops += gd->reloc_off;
132         }
133 }
134
135 void fix_devices(void)
136 {
137         struct driver_info *dev =
138                 ll_entry_start(struct driver_info, driver_info);
139         const int n_ents = ll_entry_count(struct driver_info, driver_info);
140         struct driver_info *entry;
141
142         for (entry = dev; entry != dev + n_ents; entry++) {
143                 if (entry->platdata)
144                         entry->platdata += gd->reloc_off;
145         }
146 }
147
148 #endif
149
150 int dm_init(void)
151 {
152         int ret;
153
154         if (gd->dm_root) {
155                 dm_warn("Virtual root driver already exists!\n");
156                 return -EINVAL;
157         }
158         INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST);
159
160 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
161         fix_drivers();
162         fix_uclass();
163         fix_devices();
164 #endif
165
166         ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
167         if (ret)
168                 return ret;
169 #if CONFIG_IS_ENABLED(OF_CONTROL)
170         DM_ROOT_NON_CONST->of_offset = 0;
171 #endif
172         ret = device_probe(DM_ROOT_NON_CONST);
173         if (ret)
174                 return ret;
175
176         return 0;
177 }
178
179 int dm_uninit(void)
180 {
181         device_remove(dm_root(), DM_REMOVE_NORMAL);
182         device_unbind(dm_root());
183
184         return 0;
185 }
186
187 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
188 int dm_remove_devices_flags(uint flags)
189 {
190         device_remove(dm_root(), flags);
191
192         return 0;
193 }
194 #endif
195
196 int dm_scan_platdata(bool pre_reloc_only)
197 {
198         int ret;
199
200         ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only);
201         if (ret == -ENOENT) {
202                 dm_warn("Some drivers were not found\n");
203                 ret = 0;
204         }
205
206         return ret;
207 }
208
209 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
210 int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset,
211                      bool pre_reloc_only)
212 {
213         int ret = 0, err;
214
215         for (offset = fdt_first_subnode(blob, offset);
216              offset > 0;
217              offset = fdt_next_subnode(blob, offset)) {
218                 if (pre_reloc_only &&
219                     !dm_fdt_pre_reloc(blob, offset))
220                         continue;
221                 if (!fdtdec_get_is_enabled(blob, offset)) {
222                         dm_dbg("   - ignoring disabled device\n");
223                         continue;
224                 }
225                 err = lists_bind_fdt(parent, blob, offset, NULL);
226                 if (err && !ret) {
227                         ret = err;
228                         debug("%s: ret=%d\n", fdt_get_name(blob, offset, NULL),
229                               ret);
230                 }
231         }
232
233         if (ret)
234                 dm_warn("Some drivers failed to bind\n");
235
236         return ret;
237 }
238
239 int dm_scan_fdt_dev(struct udevice *dev)
240 {
241         if (dev_of_offset(dev) == -1)
242                 return 0;
243
244         return dm_scan_fdt_node(dev, gd->fdt_blob, dev_of_offset(dev),
245                                 gd->flags & GD_FLG_RELOC ? false : true);
246 }
247
248 int dm_scan_fdt(const void *blob, bool pre_reloc_only)
249 {
250         return dm_scan_fdt_node(gd->dm_root, blob, 0, pre_reloc_only);
251 }
252 #endif
253
254 __weak int dm_scan_other(bool pre_reloc_only)
255 {
256         return 0;
257 }
258
259 int dm_init_and_scan(bool pre_reloc_only)
260 {
261         int ret;
262
263         ret = dm_init();
264         if (ret) {
265                 debug("dm_init() failed: %d\n", ret);
266                 return ret;
267         }
268         ret = dm_scan_platdata(pre_reloc_only);
269         if (ret) {
270                 debug("dm_scan_platdata() failed: %d\n", ret);
271                 return ret;
272         }
273
274         if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
275                 ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
276                 if (ret) {
277                         debug("dm_scan_fdt() failed: %d\n", ret);
278                         return ret;
279                 }
280         }
281
282         ret = dm_scan_other(pre_reloc_only);
283         if (ret)
284                 return ret;
285
286         return 0;
287 }
288
289 /* This is the root driver - all drivers are children of this */
290 U_BOOT_DRIVER(root_driver) = {
291         .name   = "root_driver",
292         .id     = UCLASS_ROOT,
293         .priv_auto_alloc_size = sizeof(struct root_priv),
294 };
295
296 /* This is the root uclass */
297 UCLASS_DRIVER(root) = {
298         .name   = "root",
299         .id     = UCLASS_ROOT,
300 };