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Commit | Line | Data |
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6494d708 SG |
1 | /* |
2 | * Device manager | |
3 | * | |
4 | * Copyright (c) 2013 Google, Inc | |
5 | * | |
6 | * (C) Copyright 2012 | |
7 | * Pavel Herrmann <morpheus.ibis@gmail.com> | |
8 | * | |
9 | * SPDX-License-Identifier: GPL-2.0+ | |
10 | */ | |
11 | ||
12 | #include <common.h> | |
7c616862 | 13 | #include <asm/io.h> |
5a66a8ff | 14 | #include <fdtdec.h> |
ef5cd330 | 15 | #include <fdt_support.h> |
6494d708 SG |
16 | #include <malloc.h> |
17 | #include <dm/device.h> | |
18 | #include <dm/device-internal.h> | |
19 | #include <dm/lists.h> | |
d90a5a30 | 20 | #include <dm/pinctrl.h> |
6494d708 SG |
21 | #include <dm/platdata.h> |
22 | #include <dm/uclass.h> | |
23 | #include <dm/uclass-internal.h> | |
24 | #include <dm/util.h> | |
25 | #include <linux/err.h> | |
26 | #include <linux/list.h> | |
27 | ||
5a66a8ff SG |
28 | DECLARE_GLOBAL_DATA_PTR; |
29 | ||
daac3bfe SW |
30 | static int device_bind_common(struct udevice *parent, const struct driver *drv, |
31 | const char *name, void *platdata, | |
32 | ulong driver_data, int of_offset, | |
9fa28190 | 33 | uint of_platdata_size, struct udevice **devp) |
6494d708 | 34 | { |
54c5d08a | 35 | struct udevice *dev; |
6494d708 | 36 | struct uclass *uc; |
5eaed880 | 37 | int size, ret = 0; |
6494d708 | 38 | |
e6cabe4a MY |
39 | if (devp) |
40 | *devp = NULL; | |
6494d708 SG |
41 | if (!name) |
42 | return -EINVAL; | |
43 | ||
44 | ret = uclass_get(drv->id, &uc); | |
3346c876 SG |
45 | if (ret) { |
46 | debug("Missing uclass for driver %s\n", drv->name); | |
6494d708 | 47 | return ret; |
3346c876 | 48 | } |
6494d708 | 49 | |
54c5d08a | 50 | dev = calloc(1, sizeof(struct udevice)); |
6494d708 SG |
51 | if (!dev) |
52 | return -ENOMEM; | |
53 | ||
54 | INIT_LIST_HEAD(&dev->sibling_node); | |
55 | INIT_LIST_HEAD(&dev->child_head); | |
56 | INIT_LIST_HEAD(&dev->uclass_node); | |
e2282d70 | 57 | #ifdef CONFIG_DEVRES |
608f26c5 | 58 | INIT_LIST_HEAD(&dev->devres_head); |
e2282d70 | 59 | #endif |
6494d708 | 60 | dev->platdata = platdata; |
daac3bfe | 61 | dev->driver_data = driver_data; |
6494d708 SG |
62 | dev->name = name; |
63 | dev->of_offset = of_offset; | |
64 | dev->parent = parent; | |
65 | dev->driver = drv; | |
66 | dev->uclass = uc; | |
5a66a8ff | 67 | |
5a66a8ff | 68 | dev->seq = -1; |
9cc36a2b | 69 | dev->req_seq = -1; |
4f627c5a | 70 | if (CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_SEQ_ALIAS)) { |
36fa61dc | 71 | /* |
770eb30e SR |
72 | * Some devices, such as a SPI bus, I2C bus and serial ports |
73 | * are numbered using aliases. | |
74 | * | |
75 | * This is just a 'requested' sequence, and will be | |
76 | * resolved (and ->seq updated) when the device is probed. | |
77 | */ | |
36fa61dc SG |
78 | if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) { |
79 | if (uc->uc_drv->name && of_offset != -1) { | |
80 | fdtdec_get_alias_seq(gd->fdt_blob, | |
81 | uc->uc_drv->name, of_offset, | |
82 | &dev->req_seq); | |
83 | } | |
9cc36a2b | 84 | } |
5a66a8ff | 85 | } |
36fa61dc | 86 | |
9fa28190 SG |
87 | if (drv->platdata_auto_alloc_size) { |
88 | bool alloc = !platdata; | |
89 | ||
90 | if (CONFIG_IS_ENABLED(OF_PLATDATA)) { | |
91 | if (of_platdata_size) { | |
92 | dev->flags |= DM_FLAG_OF_PLATDATA; | |
93 | if (of_platdata_size < | |
94 | drv->platdata_auto_alloc_size) | |
95 | alloc = true; | |
96 | } | |
97 | } | |
98 | if (alloc) { | |
99 | dev->flags |= DM_FLAG_ALLOC_PDATA; | |
100 | dev->platdata = calloc(1, | |
101 | drv->platdata_auto_alloc_size); | |
102 | if (!dev->platdata) { | |
103 | ret = -ENOMEM; | |
104 | goto fail_alloc1; | |
105 | } | |
106 | if (CONFIG_IS_ENABLED(OF_PLATDATA) && platdata) { | |
107 | memcpy(dev->platdata, platdata, | |
108 | of_platdata_size); | |
109 | } | |
f8a85449 SG |
110 | } |
111 | } | |
cdc133bd | 112 | |
5eaed880 PM |
113 | size = uc->uc_drv->per_device_platdata_auto_alloc_size; |
114 | if (size) { | |
115 | dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA; | |
116 | dev->uclass_platdata = calloc(1, size); | |
117 | if (!dev->uclass_platdata) { | |
118 | ret = -ENOMEM; | |
119 | goto fail_alloc2; | |
120 | } | |
121 | } | |
122 | ||
123 | if (parent) { | |
124 | size = parent->driver->per_child_platdata_auto_alloc_size; | |
ba8da9dc SG |
125 | if (!size) { |
126 | size = parent->uclass->uc_drv-> | |
127 | per_child_platdata_auto_alloc_size; | |
128 | } | |
cdc133bd SG |
129 | if (size) { |
130 | dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA; | |
131 | dev->parent_platdata = calloc(1, size); | |
132 | if (!dev->parent_platdata) { | |
133 | ret = -ENOMEM; | |
5eaed880 | 134 | goto fail_alloc3; |
cdc133bd SG |
135 | } |
136 | } | |
137 | } | |
6494d708 SG |
138 | |
139 | /* put dev into parent's successor list */ | |
140 | if (parent) | |
141 | list_add_tail(&dev->sibling_node, &parent->child_head); | |
142 | ||
143 | ret = uclass_bind_device(dev); | |
144 | if (ret) | |
72ebfe86 | 145 | goto fail_uclass_bind; |
6494d708 SG |
146 | |
147 | /* if we fail to bind we remove device from successors and free it */ | |
148 | if (drv->bind) { | |
149 | ret = drv->bind(dev); | |
72ebfe86 | 150 | if (ret) |
6494d708 | 151 | goto fail_bind; |
6494d708 | 152 | } |
0118ce79 SG |
153 | if (parent && parent->driver->child_post_bind) { |
154 | ret = parent->driver->child_post_bind(dev); | |
155 | if (ret) | |
156 | goto fail_child_post_bind; | |
157 | } | |
20af3c0a SG |
158 | if (uc->uc_drv->post_bind) { |
159 | ret = uc->uc_drv->post_bind(dev); | |
160 | if (ret) | |
161 | goto fail_uclass_post_bind; | |
162 | } | |
0118ce79 | 163 | |
6494d708 SG |
164 | if (parent) |
165 | dm_dbg("Bound device %s to %s\n", dev->name, parent->name); | |
e6cabe4a MY |
166 | if (devp) |
167 | *devp = dev; | |
6494d708 | 168 | |
aed1a4dd MY |
169 | dev->flags |= DM_FLAG_BOUND; |
170 | ||
6494d708 SG |
171 | return 0; |
172 | ||
20af3c0a SG |
173 | fail_uclass_post_bind: |
174 | /* There is no child unbind() method, so no clean-up required */ | |
0118ce79 | 175 | fail_child_post_bind: |
0a5804b5 | 176 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
177 | if (drv->unbind && drv->unbind(dev)) { |
178 | dm_warn("unbind() method failed on dev '%s' on error path\n", | |
179 | dev->name); | |
180 | } | |
0118ce79 SG |
181 | } |
182 | ||
6494d708 | 183 | fail_bind: |
0a5804b5 | 184 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
185 | if (uclass_unbind_device(dev)) { |
186 | dm_warn("Failed to unbind dev '%s' on error path\n", | |
187 | dev->name); | |
188 | } | |
72ebfe86 SG |
189 | } |
190 | fail_uclass_bind: | |
0a5804b5 | 191 | if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) { |
5a87c417 SG |
192 | list_del(&dev->sibling_node); |
193 | if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) { | |
194 | free(dev->parent_platdata); | |
195 | dev->parent_platdata = NULL; | |
196 | } | |
cdc133bd | 197 | } |
5eaed880 PM |
198 | fail_alloc3: |
199 | if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) { | |
200 | free(dev->uclass_platdata); | |
201 | dev->uclass_platdata = NULL; | |
202 | } | |
cdc133bd | 203 | fail_alloc2: |
f8a85449 SG |
204 | if (dev->flags & DM_FLAG_ALLOC_PDATA) { |
205 | free(dev->platdata); | |
206 | dev->platdata = NULL; | |
207 | } | |
208 | fail_alloc1: | |
608f26c5 MY |
209 | devres_release_all(dev); |
210 | ||
6494d708 | 211 | free(dev); |
72ebfe86 | 212 | |
6494d708 SG |
213 | return ret; |
214 | } | |
215 | ||
daac3bfe SW |
216 | int device_bind_with_driver_data(struct udevice *parent, |
217 | const struct driver *drv, const char *name, | |
218 | ulong driver_data, int of_offset, | |
219 | struct udevice **devp) | |
220 | { | |
221 | return device_bind_common(parent, drv, name, NULL, driver_data, | |
9fa28190 | 222 | of_offset, 0, devp); |
daac3bfe SW |
223 | } |
224 | ||
225 | int device_bind(struct udevice *parent, const struct driver *drv, | |
226 | const char *name, void *platdata, int of_offset, | |
227 | struct udevice **devp) | |
228 | { | |
9fa28190 | 229 | return device_bind_common(parent, drv, name, platdata, 0, of_offset, 0, |
daac3bfe SW |
230 | devp); |
231 | } | |
232 | ||
00606d7e SG |
233 | int device_bind_by_name(struct udevice *parent, bool pre_reloc_only, |
234 | const struct driver_info *info, struct udevice **devp) | |
6494d708 SG |
235 | { |
236 | struct driver *drv; | |
9fa28190 | 237 | uint platdata_size = 0; |
6494d708 SG |
238 | |
239 | drv = lists_driver_lookup_name(info->name); | |
240 | if (!drv) | |
241 | return -ENOENT; | |
00606d7e SG |
242 | if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC)) |
243 | return -EPERM; | |
6494d708 | 244 | |
9fa28190 SG |
245 | #if CONFIG_IS_ENABLED(OF_PLATDATA) |
246 | platdata_size = info->platdata_size; | |
247 | #endif | |
248 | return device_bind_common(parent, drv, info->name, | |
249 | (void *)info->platdata, 0, -1, platdata_size, devp); | |
6494d708 SG |
250 | } |
251 | ||
2c03c463 SG |
252 | static void *alloc_priv(int size, uint flags) |
253 | { | |
254 | void *priv; | |
255 | ||
256 | if (flags & DM_FLAG_ALLOC_PRIV_DMA) { | |
257 | priv = memalign(ARCH_DMA_MINALIGN, size); | |
258 | if (priv) | |
259 | memset(priv, '\0', size); | |
260 | } else { | |
261 | priv = calloc(1, size); | |
262 | } | |
263 | ||
264 | return priv; | |
265 | } | |
266 | ||
c6db965f | 267 | int device_probe(struct udevice *dev) |
6494d708 | 268 | { |
3479253d | 269 | const struct driver *drv; |
6494d708 SG |
270 | int size = 0; |
271 | int ret; | |
5a66a8ff | 272 | int seq; |
6494d708 SG |
273 | |
274 | if (!dev) | |
275 | return -EINVAL; | |
276 | ||
277 | if (dev->flags & DM_FLAG_ACTIVATED) | |
278 | return 0; | |
279 | ||
280 | drv = dev->driver; | |
281 | assert(drv); | |
282 | ||
cdeb2ba9 BM |
283 | /* Allocate private data if requested and not reentered */ |
284 | if (drv->priv_auto_alloc_size && !dev->priv) { | |
2c03c463 | 285 | dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags); |
6494d708 SG |
286 | if (!dev->priv) { |
287 | ret = -ENOMEM; | |
288 | goto fail; | |
289 | } | |
290 | } | |
cdeb2ba9 | 291 | /* Allocate private data if requested and not reentered */ |
6494d708 | 292 | size = dev->uclass->uc_drv->per_device_auto_alloc_size; |
cdeb2ba9 | 293 | if (size && !dev->uclass_priv) { |
6494d708 SG |
294 | dev->uclass_priv = calloc(1, size); |
295 | if (!dev->uclass_priv) { | |
296 | ret = -ENOMEM; | |
297 | goto fail; | |
298 | } | |
299 | } | |
300 | ||
301 | /* Ensure all parents are probed */ | |
302 | if (dev->parent) { | |
e59f458d | 303 | size = dev->parent->driver->per_child_auto_alloc_size; |
dac8db2c SG |
304 | if (!size) { |
305 | size = dev->parent->uclass->uc_drv-> | |
306 | per_child_auto_alloc_size; | |
307 | } | |
cdeb2ba9 | 308 | if (size && !dev->parent_priv) { |
2c03c463 | 309 | dev->parent_priv = alloc_priv(size, drv->flags); |
e59f458d SG |
310 | if (!dev->parent_priv) { |
311 | ret = -ENOMEM; | |
312 | goto fail; | |
313 | } | |
314 | } | |
315 | ||
6494d708 SG |
316 | ret = device_probe(dev->parent); |
317 | if (ret) | |
318 | goto fail; | |
cdeb2ba9 BM |
319 | |
320 | /* | |
321 | * The device might have already been probed during | |
322 | * the call to device_probe() on its parent device | |
323 | * (e.g. PCI bridge devices). Test the flags again | |
324 | * so that we don't mess up the device. | |
325 | */ | |
326 | if (dev->flags & DM_FLAG_ACTIVATED) | |
327 | return 0; | |
6494d708 SG |
328 | } |
329 | ||
5a66a8ff SG |
330 | seq = uclass_resolve_seq(dev); |
331 | if (seq < 0) { | |
332 | ret = seq; | |
333 | goto fail; | |
334 | } | |
335 | dev->seq = seq; | |
336 | ||
206d4d2b SG |
337 | dev->flags |= DM_FLAG_ACTIVATED; |
338 | ||
84d26e29 SG |
339 | /* |
340 | * Process pinctrl for everything except the root device, and | |
0379597e SG |
341 | * continue regardless of the result of pinctrl. Don't process pinctrl |
342 | * settings for pinctrl devices since the device may not yet be | |
343 | * probed. | |
84d26e29 | 344 | */ |
0379597e | 345 | if (dev->parent && device_get_uclass_id(dev) != UCLASS_PINCTRL) |
84d26e29 | 346 | pinctrl_select_state(dev, "default"); |
d90a5a30 | 347 | |
02c07b37 | 348 | ret = uclass_pre_probe_device(dev); |
83c7e434 SG |
349 | if (ret) |
350 | goto fail; | |
351 | ||
a327dee0 SG |
352 | if (dev->parent && dev->parent->driver->child_pre_probe) { |
353 | ret = dev->parent->driver->child_pre_probe(dev); | |
354 | if (ret) | |
355 | goto fail; | |
356 | } | |
357 | ||
e160f7d4 | 358 | if (drv->ofdata_to_platdata && dev_of_offset(dev) >= 0) { |
6494d708 SG |
359 | ret = drv->ofdata_to_platdata(dev); |
360 | if (ret) | |
361 | goto fail; | |
362 | } | |
363 | ||
364 | if (drv->probe) { | |
365 | ret = drv->probe(dev); | |
02eeb1bb SG |
366 | if (ret) { |
367 | dev->flags &= ~DM_FLAG_ACTIVATED; | |
6494d708 | 368 | goto fail; |
02eeb1bb | 369 | } |
6494d708 SG |
370 | } |
371 | ||
6494d708 | 372 | ret = uclass_post_probe_device(dev); |
206d4d2b | 373 | if (ret) |
6494d708 | 374 | goto fail_uclass; |
6494d708 | 375 | |
c3ab9853 PF |
376 | if (dev->parent && device_get_uclass_id(dev) == UCLASS_PINCTRL) |
377 | pinctrl_select_state(dev, "default"); | |
378 | ||
6494d708 SG |
379 | return 0; |
380 | fail_uclass: | |
381 | if (device_remove(dev)) { | |
382 | dm_warn("%s: Device '%s' failed to remove on error path\n", | |
383 | __func__, dev->name); | |
384 | } | |
385 | fail: | |
206d4d2b SG |
386 | dev->flags &= ~DM_FLAG_ACTIVATED; |
387 | ||
5a66a8ff | 388 | dev->seq = -1; |
6494d708 SG |
389 | device_free(dev); |
390 | ||
391 | return ret; | |
392 | } | |
393 | ||
54c5d08a | 394 | void *dev_get_platdata(struct udevice *dev) |
6494d708 SG |
395 | { |
396 | if (!dev) { | |
964d153c | 397 | dm_warn("%s: null device\n", __func__); |
6494d708 SG |
398 | return NULL; |
399 | } | |
400 | ||
401 | return dev->platdata; | |
402 | } | |
403 | ||
cdc133bd SG |
404 | void *dev_get_parent_platdata(struct udevice *dev) |
405 | { | |
406 | if (!dev) { | |
36d7cc17 | 407 | dm_warn("%s: null device\n", __func__); |
cdc133bd SG |
408 | return NULL; |
409 | } | |
410 | ||
411 | return dev->parent_platdata; | |
412 | } | |
413 | ||
5eaed880 PM |
414 | void *dev_get_uclass_platdata(struct udevice *dev) |
415 | { | |
416 | if (!dev) { | |
36d7cc17 | 417 | dm_warn("%s: null device\n", __func__); |
5eaed880 PM |
418 | return NULL; |
419 | } | |
420 | ||
421 | return dev->uclass_platdata; | |
422 | } | |
423 | ||
54c5d08a | 424 | void *dev_get_priv(struct udevice *dev) |
6494d708 SG |
425 | { |
426 | if (!dev) { | |
964d153c | 427 | dm_warn("%s: null device\n", __func__); |
6494d708 SG |
428 | return NULL; |
429 | } | |
430 | ||
431 | return dev->priv; | |
432 | } | |
997c87bb | 433 | |
e564f054 SG |
434 | void *dev_get_uclass_priv(struct udevice *dev) |
435 | { | |
436 | if (!dev) { | |
437 | dm_warn("%s: null device\n", __func__); | |
438 | return NULL; | |
439 | } | |
440 | ||
441 | return dev->uclass_priv; | |
442 | } | |
443 | ||
bcbe3d15 | 444 | void *dev_get_parent_priv(struct udevice *dev) |
e59f458d SG |
445 | { |
446 | if (!dev) { | |
964d153c | 447 | dm_warn("%s: null device\n", __func__); |
e59f458d SG |
448 | return NULL; |
449 | } | |
450 | ||
451 | return dev->parent_priv; | |
452 | } | |
453 | ||
997c87bb SG |
454 | static int device_get_device_tail(struct udevice *dev, int ret, |
455 | struct udevice **devp) | |
456 | { | |
457 | if (ret) | |
458 | return ret; | |
459 | ||
460 | ret = device_probe(dev); | |
461 | if (ret) | |
462 | return ret; | |
463 | ||
464 | *devp = dev; | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | int device_get_child(struct udevice *parent, int index, struct udevice **devp) | |
470 | { | |
471 | struct udevice *dev; | |
472 | ||
473 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
474 | if (!index--) | |
475 | return device_get_device_tail(dev, 0, devp); | |
476 | } | |
477 | ||
478 | return -ENODEV; | |
479 | } | |
480 | ||
481 | int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq, | |
482 | bool find_req_seq, struct udevice **devp) | |
483 | { | |
484 | struct udevice *dev; | |
485 | ||
486 | *devp = NULL; | |
487 | if (seq_or_req_seq == -1) | |
488 | return -ENODEV; | |
489 | ||
490 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
491 | if ((find_req_seq ? dev->req_seq : dev->seq) == | |
492 | seq_or_req_seq) { | |
493 | *devp = dev; | |
494 | return 0; | |
495 | } | |
496 | } | |
497 | ||
498 | return -ENODEV; | |
499 | } | |
500 | ||
501 | int device_get_child_by_seq(struct udevice *parent, int seq, | |
502 | struct udevice **devp) | |
503 | { | |
504 | struct udevice *dev; | |
505 | int ret; | |
506 | ||
507 | *devp = NULL; | |
508 | ret = device_find_child_by_seq(parent, seq, false, &dev); | |
509 | if (ret == -ENODEV) { | |
510 | /* | |
511 | * We didn't find it in probed devices. See if there is one | |
512 | * that will request this seq if probed. | |
513 | */ | |
514 | ret = device_find_child_by_seq(parent, seq, true, &dev); | |
515 | } | |
516 | return device_get_device_tail(dev, ret, devp); | |
517 | } | |
518 | ||
519 | int device_find_child_by_of_offset(struct udevice *parent, int of_offset, | |
520 | struct udevice **devp) | |
521 | { | |
522 | struct udevice *dev; | |
523 | ||
524 | *devp = NULL; | |
525 | ||
526 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
e160f7d4 | 527 | if (dev_of_offset(dev) == of_offset) { |
997c87bb SG |
528 | *devp = dev; |
529 | return 0; | |
530 | } | |
531 | } | |
532 | ||
533 | return -ENODEV; | |
534 | } | |
535 | ||
132f9bfc | 536 | int device_get_child_by_of_offset(struct udevice *parent, int node, |
997c87bb SG |
537 | struct udevice **devp) |
538 | { | |
539 | struct udevice *dev; | |
540 | int ret; | |
541 | ||
542 | *devp = NULL; | |
132f9bfc | 543 | ret = device_find_child_by_of_offset(parent, node, &dev); |
997c87bb SG |
544 | return device_get_device_tail(dev, ret, devp); |
545 | } | |
a8981d4f | 546 | |
2693047a SG |
547 | static struct udevice *_device_find_global_by_of_offset(struct udevice *parent, |
548 | int of_offset) | |
549 | { | |
550 | struct udevice *dev, *found; | |
551 | ||
e160f7d4 | 552 | if (dev_of_offset(parent) == of_offset) |
2693047a SG |
553 | return parent; |
554 | ||
555 | list_for_each_entry(dev, &parent->child_head, sibling_node) { | |
556 | found = _device_find_global_by_of_offset(dev, of_offset); | |
557 | if (found) | |
558 | return found; | |
559 | } | |
560 | ||
561 | return NULL; | |
562 | } | |
563 | ||
564 | int device_get_global_by_of_offset(int of_offset, struct udevice **devp) | |
565 | { | |
566 | struct udevice *dev; | |
567 | ||
568 | dev = _device_find_global_by_of_offset(gd->dm_root, of_offset); | |
569 | return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp); | |
570 | } | |
571 | ||
a8981d4f SG |
572 | int device_find_first_child(struct udevice *parent, struct udevice **devp) |
573 | { | |
574 | if (list_empty(&parent->child_head)) { | |
575 | *devp = NULL; | |
576 | } else { | |
577 | *devp = list_first_entry(&parent->child_head, struct udevice, | |
578 | sibling_node); | |
579 | } | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | int device_find_next_child(struct udevice **devp) | |
585 | { | |
586 | struct udevice *dev = *devp; | |
587 | struct udevice *parent = dev->parent; | |
588 | ||
589 | if (list_is_last(&dev->sibling_node, &parent->child_head)) { | |
590 | *devp = NULL; | |
591 | } else { | |
592 | *devp = list_entry(dev->sibling_node.next, struct udevice, | |
593 | sibling_node); | |
594 | } | |
595 | ||
596 | return 0; | |
597 | } | |
2ef249b4 | 598 | |
479728cb SG |
599 | struct udevice *dev_get_parent(struct udevice *child) |
600 | { | |
601 | return child->parent; | |
602 | } | |
603 | ||
39de8433 | 604 | ulong dev_get_driver_data(struct udevice *dev) |
2ef249b4 | 605 | { |
39de8433 | 606 | return dev->driver_data; |
2ef249b4 | 607 | } |
b3670531 | 608 | |
cc73d37b PM |
609 | const void *dev_get_driver_ops(struct udevice *dev) |
610 | { | |
611 | if (!dev || !dev->driver->ops) | |
612 | return NULL; | |
613 | ||
614 | return dev->driver->ops; | |
615 | } | |
616 | ||
b3670531 SG |
617 | enum uclass_id device_get_uclass_id(struct udevice *dev) |
618 | { | |
619 | return dev->uclass->uc_drv->id; | |
620 | } | |
c9cac3f8 | 621 | |
f9c370dc PM |
622 | const char *dev_get_uclass_name(struct udevice *dev) |
623 | { | |
624 | if (!dev) | |
625 | return NULL; | |
626 | ||
627 | return dev->uclass->uc_drv->name; | |
628 | } | |
629 | ||
69b41388 | 630 | fdt_addr_t dev_get_addr_index(struct udevice *dev, int index) |
c9cac3f8 | 631 | { |
29629eb8 | 632 | #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) |
f3301771 SG |
633 | fdt_addr_t addr; |
634 | ||
ef5cd330 SR |
635 | if (CONFIG_IS_ENABLED(OF_TRANSLATE)) { |
636 | const fdt32_t *reg; | |
69b41388 M |
637 | int len = 0; |
638 | int na, ns; | |
ef5cd330 | 639 | |
e160f7d4 SG |
640 | na = fdt_address_cells(gd->fdt_blob, |
641 | dev_of_offset(dev->parent)); | |
69b41388 M |
642 | if (na < 1) { |
643 | debug("bad #address-cells\n"); | |
ef5cd330 | 644 | return FDT_ADDR_T_NONE; |
69b41388 M |
645 | } |
646 | ||
e160f7d4 | 647 | ns = fdt_size_cells(gd->fdt_blob, dev_of_offset(dev->parent)); |
69b41388 M |
648 | if (ns < 0) { |
649 | debug("bad #size-cells\n"); | |
650 | return FDT_ADDR_T_NONE; | |
651 | } | |
652 | ||
e160f7d4 SG |
653 | reg = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "reg", |
654 | &len); | |
69b41388 M |
655 | if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) { |
656 | debug("Req index out of range\n"); | |
657 | return FDT_ADDR_T_NONE; | |
658 | } | |
659 | ||
660 | reg += index * (na + ns); | |
ef5cd330 SR |
661 | |
662 | /* | |
663 | * Use the full-fledged translate function for complex | |
664 | * bus setups. | |
665 | */ | |
66eaea6c | 666 | addr = fdt_translate_address((void *)gd->fdt_blob, |
e160f7d4 | 667 | dev_of_offset(dev), reg); |
66eaea6c SR |
668 | } else { |
669 | /* | |
670 | * Use the "simple" translate function for less complex | |
671 | * bus setups. | |
672 | */ | |
673 | addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob, | |
e160f7d4 SG |
674 | dev_of_offset(dev->parent), dev_of_offset(dev), |
675 | "reg", index, NULL, false); | |
66eaea6c SR |
676 | if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) { |
677 | if (device_get_uclass_id(dev->parent) == | |
678 | UCLASS_SIMPLE_BUS) | |
679 | addr = simple_bus_translate(dev->parent, addr); | |
680 | } | |
ef5cd330 SR |
681 | } |
682 | ||
683 | /* | |
66eaea6c SR |
684 | * Some platforms need a special address translation. Those |
685 | * platforms (e.g. mvebu in SPL) can configure a translation | |
686 | * offset in the DM by calling dm_set_translation_offset() that | |
687 | * will get added to all addresses returned by dev_get_addr(). | |
ef5cd330 | 688 | */ |
66eaea6c | 689 | addr += dm_get_translation_offset(); |
f3301771 SG |
690 | |
691 | return addr; | |
c9cac3f8 | 692 | #else |
c9cac3f8 | 693 | return FDT_ADDR_T_NONE; |
c9cac3f8 | 694 | #endif |
f3301771 | 695 | } |
c5785673 | 696 | |
13f3fcac SR |
697 | fdt_addr_t dev_get_addr_size_index(struct udevice *dev, int index, |
698 | fdt_size_t *size) | |
699 | { | |
700 | #if CONFIG_IS_ENABLED(OF_CONTROL) | |
701 | /* | |
702 | * Only get the size in this first call. We'll get the addr in the | |
703 | * next call to the exisiting dev_get_xxx function which handles | |
704 | * all config options. | |
705 | */ | |
e160f7d4 | 706 | fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, dev_of_offset(dev), |
13f3fcac SR |
707 | "reg", index, size, false); |
708 | ||
709 | /* | |
710 | * Get the base address via the existing function which handles | |
711 | * all Kconfig cases | |
712 | */ | |
713 | return dev_get_addr_index(dev, index); | |
714 | #else | |
715 | return FDT_ADDR_T_NONE; | |
716 | #endif | |
717 | } | |
718 | ||
43c4d44e SW |
719 | fdt_addr_t dev_get_addr_name(struct udevice *dev, const char *name) |
720 | { | |
721 | #if CONFIG_IS_ENABLED(OF_CONTROL) | |
722 | int index; | |
723 | ||
e160f7d4 | 724 | index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev), |
6e67f176 | 725 | "reg-names", name); |
43c4d44e SW |
726 | if (index < 0) |
727 | return index; | |
728 | ||
729 | return dev_get_addr_index(dev, index); | |
730 | #else | |
731 | return FDT_ADDR_T_NONE; | |
732 | #endif | |
733 | } | |
734 | ||
69b41388 M |
735 | fdt_addr_t dev_get_addr(struct udevice *dev) |
736 | { | |
737 | return dev_get_addr_index(dev, 0); | |
738 | } | |
739 | ||
28027521 SR |
740 | void *dev_get_addr_ptr(struct udevice *dev) |
741 | { | |
742 | return (void *)(uintptr_t)dev_get_addr_index(dev, 0); | |
743 | } | |
744 | ||
7c616862 V |
745 | void *dev_map_physmem(struct udevice *dev, unsigned long size) |
746 | { | |
747 | fdt_addr_t addr = dev_get_addr(dev); | |
748 | ||
749 | if (addr == FDT_ADDR_T_NONE) | |
750 | return NULL; | |
751 | ||
752 | return map_physmem(addr, size, MAP_NOCACHE); | |
753 | } | |
754 | ||
c5785673 SG |
755 | bool device_has_children(struct udevice *dev) |
756 | { | |
757 | return !list_empty(&dev->child_head); | |
758 | } | |
759 | ||
760 | bool device_has_active_children(struct udevice *dev) | |
761 | { | |
762 | struct udevice *child; | |
763 | ||
764 | for (device_find_first_child(dev, &child); | |
765 | child; | |
766 | device_find_next_child(&child)) { | |
767 | if (device_active(child)) | |
768 | return true; | |
769 | } | |
770 | ||
771 | return false; | |
772 | } | |
773 | ||
774 | bool device_is_last_sibling(struct udevice *dev) | |
775 | { | |
776 | struct udevice *parent = dev->parent; | |
777 | ||
778 | if (!parent) | |
779 | return false; | |
780 | return list_is_last(&dev->sibling_node, &parent->child_head); | |
781 | } | |
f5c67ea0 | 782 | |
a2040fac SG |
783 | void device_set_name_alloced(struct udevice *dev) |
784 | { | |
fd1c2d9b | 785 | dev->flags |= DM_FLAG_NAME_ALLOCED; |
a2040fac SG |
786 | } |
787 | ||
f5c67ea0 SG |
788 | int device_set_name(struct udevice *dev, const char *name) |
789 | { | |
790 | name = strdup(name); | |
791 | if (!name) | |
792 | return -ENOMEM; | |
793 | dev->name = name; | |
a2040fac | 794 | device_set_name_alloced(dev); |
f5c67ea0 SG |
795 | |
796 | return 0; | |
797 | } | |
73443b9e M |
798 | |
799 | bool of_device_is_compatible(struct udevice *dev, const char *compat) | |
800 | { | |
801 | const void *fdt = gd->fdt_blob; | |
802 | ||
e160f7d4 | 803 | return !fdt_node_check_compatible(fdt, dev_of_offset(dev), compat); |
73443b9e M |
804 | } |
805 | ||
806 | bool of_machine_is_compatible(const char *compat) | |
807 | { | |
808 | const void *fdt = gd->fdt_blob; | |
809 | ||
810 | return !fdt_node_check_compatible(fdt, 0, compat); | |
811 | } |