dm: core: Don't set pinctrl for pinctrl devices
[platform/kernel/u-boot.git] / drivers / core / device.c
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>
13 #include <fdtdec.h>
14 #include <fdt_support.h>
15 #include <malloc.h>
16 #include <dm/device.h>
17 #include <dm/device-internal.h>
18 #include <dm/lists.h>
19 #include <dm/pinctrl.h>
20 #include <dm/platdata.h>
21 #include <dm/uclass.h>
22 #include <dm/uclass-internal.h>
23 #include <dm/util.h>
24 #include <linux/err.h>
25 #include <linux/list.h>
26
27 DECLARE_GLOBAL_DATA_PTR;
28
29 int device_bind(struct udevice *parent, const struct driver *drv,
30                 const char *name, void *platdata, int of_offset,
31                 struct udevice **devp)
32 {
33         struct udevice *dev;
34         struct uclass *uc;
35         int size, ret = 0;
36
37         if (devp)
38                 *devp = NULL;
39         if (!name)
40                 return -EINVAL;
41
42         ret = uclass_get(drv->id, &uc);
43         if (ret) {
44                 debug("Missing uclass for driver %s\n", drv->name);
45                 return ret;
46         }
47
48         dev = calloc(1, sizeof(struct udevice));
49         if (!dev)
50                 return -ENOMEM;
51
52         INIT_LIST_HEAD(&dev->sibling_node);
53         INIT_LIST_HEAD(&dev->child_head);
54         INIT_LIST_HEAD(&dev->uclass_node);
55 #ifdef CONFIG_DEVRES
56         INIT_LIST_HEAD(&dev->devres_head);
57 #endif
58         dev->platdata = platdata;
59         dev->name = name;
60         dev->of_offset = of_offset;
61         dev->parent = parent;
62         dev->driver = drv;
63         dev->uclass = uc;
64
65         dev->seq = -1;
66         dev->req_seq = -1;
67         if (CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_SEQ_ALIAS)) {
68                 /*
69                 * Some devices, such as a SPI bus, I2C bus and serial ports
70                 * are numbered using aliases.
71                 *
72                 * This is just a 'requested' sequence, and will be
73                 * resolved (and ->seq updated) when the device is probed.
74                 */
75                 if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
76                         if (uc->uc_drv->name && of_offset != -1) {
77                                 fdtdec_get_alias_seq(gd->fdt_blob,
78                                                 uc->uc_drv->name, of_offset,
79                                                 &dev->req_seq);
80                         }
81                 }
82         }
83
84         if (!dev->platdata && drv->platdata_auto_alloc_size) {
85                 dev->flags |= DM_FLAG_ALLOC_PDATA;
86                 dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
87                 if (!dev->platdata) {
88                         ret = -ENOMEM;
89                         goto fail_alloc1;
90                 }
91         }
92
93         size = uc->uc_drv->per_device_platdata_auto_alloc_size;
94         if (size) {
95                 dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA;
96                 dev->uclass_platdata = calloc(1, size);
97                 if (!dev->uclass_platdata) {
98                         ret = -ENOMEM;
99                         goto fail_alloc2;
100                 }
101         }
102
103         if (parent) {
104                 size = parent->driver->per_child_platdata_auto_alloc_size;
105                 if (!size) {
106                         size = parent->uclass->uc_drv->
107                                         per_child_platdata_auto_alloc_size;
108                 }
109                 if (size) {
110                         dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA;
111                         dev->parent_platdata = calloc(1, size);
112                         if (!dev->parent_platdata) {
113                                 ret = -ENOMEM;
114                                 goto fail_alloc3;
115                         }
116                 }
117         }
118
119         /* put dev into parent's successor list */
120         if (parent)
121                 list_add_tail(&dev->sibling_node, &parent->child_head);
122
123         ret = uclass_bind_device(dev);
124         if (ret)
125                 goto fail_uclass_bind;
126
127         /* if we fail to bind we remove device from successors and free it */
128         if (drv->bind) {
129                 ret = drv->bind(dev);
130                 if (ret)
131                         goto fail_bind;
132         }
133         if (parent && parent->driver->child_post_bind) {
134                 ret = parent->driver->child_post_bind(dev);
135                 if (ret)
136                         goto fail_child_post_bind;
137         }
138         if (uc->uc_drv->post_bind) {
139                 ret = uc->uc_drv->post_bind(dev);
140                 if (ret)
141                         goto fail_uclass_post_bind;
142         }
143
144         if (parent)
145                 dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
146         if (devp)
147                 *devp = dev;
148
149         dev->flags |= DM_FLAG_BOUND;
150
151         return 0;
152
153 fail_uclass_post_bind:
154         /* There is no child unbind() method, so no clean-up required */
155 fail_child_post_bind:
156         if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
157                 if (drv->unbind && drv->unbind(dev)) {
158                         dm_warn("unbind() method failed on dev '%s' on error path\n",
159                                 dev->name);
160                 }
161         }
162
163 fail_bind:
164         if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
165                 if (uclass_unbind_device(dev)) {
166                         dm_warn("Failed to unbind dev '%s' on error path\n",
167                                 dev->name);
168                 }
169         }
170 fail_uclass_bind:
171         if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
172                 list_del(&dev->sibling_node);
173                 if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
174                         free(dev->parent_platdata);
175                         dev->parent_platdata = NULL;
176                 }
177         }
178 fail_alloc3:
179         if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
180                 free(dev->uclass_platdata);
181                 dev->uclass_platdata = NULL;
182         }
183 fail_alloc2:
184         if (dev->flags & DM_FLAG_ALLOC_PDATA) {
185                 free(dev->platdata);
186                 dev->platdata = NULL;
187         }
188 fail_alloc1:
189         devres_release_all(dev);
190
191         free(dev);
192
193         return ret;
194 }
195
196 int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
197                         const struct driver_info *info, struct udevice **devp)
198 {
199         struct driver *drv;
200
201         drv = lists_driver_lookup_name(info->name);
202         if (!drv)
203                 return -ENOENT;
204         if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
205                 return -EPERM;
206
207         return device_bind(parent, drv, info->name, (void *)info->platdata,
208                            -1, devp);
209 }
210
211 static void *alloc_priv(int size, uint flags)
212 {
213         void *priv;
214
215         if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
216                 priv = memalign(ARCH_DMA_MINALIGN, size);
217                 if (priv)
218                         memset(priv, '\0', size);
219         } else {
220                 priv = calloc(1, size);
221         }
222
223         return priv;
224 }
225
226 int device_probe_child(struct udevice *dev, void *parent_priv)
227 {
228         const struct driver *drv;
229         int size = 0;
230         int ret;
231         int seq;
232
233         if (!dev)
234                 return -EINVAL;
235
236         if (dev->flags & DM_FLAG_ACTIVATED)
237                 return 0;
238
239         drv = dev->driver;
240         assert(drv);
241
242         /* Allocate private data if requested and not reentered */
243         if (drv->priv_auto_alloc_size && !dev->priv) {
244                 dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
245                 if (!dev->priv) {
246                         ret = -ENOMEM;
247                         goto fail;
248                 }
249         }
250         /* Allocate private data if requested and not reentered */
251         size = dev->uclass->uc_drv->per_device_auto_alloc_size;
252         if (size && !dev->uclass_priv) {
253                 dev->uclass_priv = calloc(1, size);
254                 if (!dev->uclass_priv) {
255                         ret = -ENOMEM;
256                         goto fail;
257                 }
258         }
259
260         /* Ensure all parents are probed */
261         if (dev->parent) {
262                 size = dev->parent->driver->per_child_auto_alloc_size;
263                 if (!size) {
264                         size = dev->parent->uclass->uc_drv->
265                                         per_child_auto_alloc_size;
266                 }
267                 if (size && !dev->parent_priv) {
268                         dev->parent_priv = alloc_priv(size, drv->flags);
269                         if (!dev->parent_priv) {
270                                 ret = -ENOMEM;
271                                 goto fail;
272                         }
273                         if (parent_priv)
274                                 memcpy(dev->parent_priv, parent_priv, size);
275                 }
276
277                 ret = device_probe(dev->parent);
278                 if (ret)
279                         goto fail;
280
281                 /*
282                  * The device might have already been probed during
283                  * the call to device_probe() on its parent device
284                  * (e.g. PCI bridge devices). Test the flags again
285                  * so that we don't mess up the device.
286                  */
287                 if (dev->flags & DM_FLAG_ACTIVATED)
288                         return 0;
289         }
290
291         seq = uclass_resolve_seq(dev);
292         if (seq < 0) {
293                 ret = seq;
294                 goto fail;
295         }
296         dev->seq = seq;
297
298         dev->flags |= DM_FLAG_ACTIVATED;
299
300         /*
301          * Process pinctrl for everything except the root device, and
302          * continue regardless of the result of pinctrl. Don't process pinctrl
303          * settings for pinctrl devices since the device may not yet be
304          * probed.
305          */
306         if (dev->parent && device_get_uclass_id(dev) != UCLASS_PINCTRL)
307                 pinctrl_select_state(dev, "default");
308
309         ret = uclass_pre_probe_device(dev);
310         if (ret)
311                 goto fail;
312
313         if (dev->parent && dev->parent->driver->child_pre_probe) {
314                 ret = dev->parent->driver->child_pre_probe(dev);
315                 if (ret)
316                         goto fail;
317         }
318
319         if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
320                 ret = drv->ofdata_to_platdata(dev);
321                 if (ret)
322                         goto fail;
323         }
324
325         if (drv->probe) {
326                 ret = drv->probe(dev);
327                 if (ret) {
328                         dev->flags &= ~DM_FLAG_ACTIVATED;
329                         goto fail;
330                 }
331         }
332
333         ret = uclass_post_probe_device(dev);
334         if (ret)
335                 goto fail_uclass;
336
337         return 0;
338 fail_uclass:
339         if (device_remove(dev)) {
340                 dm_warn("%s: Device '%s' failed to remove on error path\n",
341                         __func__, dev->name);
342         }
343 fail:
344         dev->flags &= ~DM_FLAG_ACTIVATED;
345
346         dev->seq = -1;
347         device_free(dev);
348
349         return ret;
350 }
351
352 int device_probe(struct udevice *dev)
353 {
354         return device_probe_child(dev, NULL);
355 }
356
357 void *dev_get_platdata(struct udevice *dev)
358 {
359         if (!dev) {
360                 dm_warn("%s: null device\n", __func__);
361                 return NULL;
362         }
363
364         return dev->platdata;
365 }
366
367 void *dev_get_parent_platdata(struct udevice *dev)
368 {
369         if (!dev) {
370                 dm_warn("%s: null device\n", __func__);
371                 return NULL;
372         }
373
374         return dev->parent_platdata;
375 }
376
377 void *dev_get_uclass_platdata(struct udevice *dev)
378 {
379         if (!dev) {
380                 dm_warn("%s: null device\n", __func__);
381                 return NULL;
382         }
383
384         return dev->uclass_platdata;
385 }
386
387 void *dev_get_priv(struct udevice *dev)
388 {
389         if (!dev) {
390                 dm_warn("%s: null device\n", __func__);
391                 return NULL;
392         }
393
394         return dev->priv;
395 }
396
397 void *dev_get_uclass_priv(struct udevice *dev)
398 {
399         if (!dev) {
400                 dm_warn("%s: null device\n", __func__);
401                 return NULL;
402         }
403
404         return dev->uclass_priv;
405 }
406
407 void *dev_get_parent_priv(struct udevice *dev)
408 {
409         if (!dev) {
410                 dm_warn("%s: null device\n", __func__);
411                 return NULL;
412         }
413
414         return dev->parent_priv;
415 }
416
417 static int device_get_device_tail(struct udevice *dev, int ret,
418                                   struct udevice **devp)
419 {
420         if (ret)
421                 return ret;
422
423         ret = device_probe(dev);
424         if (ret)
425                 return ret;
426
427         *devp = dev;
428
429         return 0;
430 }
431
432 int device_get_child(struct udevice *parent, int index, struct udevice **devp)
433 {
434         struct udevice *dev;
435
436         list_for_each_entry(dev, &parent->child_head, sibling_node) {
437                 if (!index--)
438                         return device_get_device_tail(dev, 0, devp);
439         }
440
441         return -ENODEV;
442 }
443
444 int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
445                              bool find_req_seq, struct udevice **devp)
446 {
447         struct udevice *dev;
448
449         *devp = NULL;
450         if (seq_or_req_seq == -1)
451                 return -ENODEV;
452
453         list_for_each_entry(dev, &parent->child_head, sibling_node) {
454                 if ((find_req_seq ? dev->req_seq : dev->seq) ==
455                                 seq_or_req_seq) {
456                         *devp = dev;
457                         return 0;
458                 }
459         }
460
461         return -ENODEV;
462 }
463
464 int device_get_child_by_seq(struct udevice *parent, int seq,
465                             struct udevice **devp)
466 {
467         struct udevice *dev;
468         int ret;
469
470         *devp = NULL;
471         ret = device_find_child_by_seq(parent, seq, false, &dev);
472         if (ret == -ENODEV) {
473                 /*
474                  * We didn't find it in probed devices. See if there is one
475                  * that will request this seq if probed.
476                  */
477                 ret = device_find_child_by_seq(parent, seq, true, &dev);
478         }
479         return device_get_device_tail(dev, ret, devp);
480 }
481
482 int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
483                                    struct udevice **devp)
484 {
485         struct udevice *dev;
486
487         *devp = NULL;
488
489         list_for_each_entry(dev, &parent->child_head, sibling_node) {
490                 if (dev->of_offset == of_offset) {
491                         *devp = dev;
492                         return 0;
493                 }
494         }
495
496         return -ENODEV;
497 }
498
499 int device_get_child_by_of_offset(struct udevice *parent, int node,
500                                   struct udevice **devp)
501 {
502         struct udevice *dev;
503         int ret;
504
505         *devp = NULL;
506         ret = device_find_child_by_of_offset(parent, node, &dev);
507         return device_get_device_tail(dev, ret, devp);
508 }
509
510 static struct udevice *_device_find_global_by_of_offset(struct udevice *parent,
511                                                         int of_offset)
512 {
513         struct udevice *dev, *found;
514
515         if (parent->of_offset == of_offset)
516                 return parent;
517
518         list_for_each_entry(dev, &parent->child_head, sibling_node) {
519                 found = _device_find_global_by_of_offset(dev, of_offset);
520                 if (found)
521                         return found;
522         }
523
524         return NULL;
525 }
526
527 int device_get_global_by_of_offset(int of_offset, struct udevice **devp)
528 {
529         struct udevice *dev;
530
531         dev = _device_find_global_by_of_offset(gd->dm_root, of_offset);
532         return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
533 }
534
535 int device_find_first_child(struct udevice *parent, struct udevice **devp)
536 {
537         if (list_empty(&parent->child_head)) {
538                 *devp = NULL;
539         } else {
540                 *devp = list_first_entry(&parent->child_head, struct udevice,
541                                          sibling_node);
542         }
543
544         return 0;
545 }
546
547 int device_find_next_child(struct udevice **devp)
548 {
549         struct udevice *dev = *devp;
550         struct udevice *parent = dev->parent;
551
552         if (list_is_last(&dev->sibling_node, &parent->child_head)) {
553                 *devp = NULL;
554         } else {
555                 *devp = list_entry(dev->sibling_node.next, struct udevice,
556                                    sibling_node);
557         }
558
559         return 0;
560 }
561
562 struct udevice *dev_get_parent(struct udevice *child)
563 {
564         return child->parent;
565 }
566
567 ulong dev_get_driver_data(struct udevice *dev)
568 {
569         return dev->driver_data;
570 }
571
572 const void *dev_get_driver_ops(struct udevice *dev)
573 {
574         if (!dev || !dev->driver->ops)
575                 return NULL;
576
577         return dev->driver->ops;
578 }
579
580 enum uclass_id device_get_uclass_id(struct udevice *dev)
581 {
582         return dev->uclass->uc_drv->id;
583 }
584
585 const char *dev_get_uclass_name(struct udevice *dev)
586 {
587         if (!dev)
588                 return NULL;
589
590         return dev->uclass->uc_drv->name;
591 }
592
593 fdt_addr_t dev_get_addr_index(struct udevice *dev, int index)
594 {
595 #if CONFIG_IS_ENABLED(OF_CONTROL)
596         fdt_addr_t addr;
597
598         if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
599                 const fdt32_t *reg;
600                 int len = 0;
601                 int na, ns;
602
603                 na = fdt_address_cells(gd->fdt_blob, dev->parent->of_offset);
604                 if (na < 1) {
605                         debug("bad #address-cells\n");
606                         return FDT_ADDR_T_NONE;
607                 }
608
609                 ns = fdt_size_cells(gd->fdt_blob, dev->parent->of_offset);
610                 if (ns < 0) {
611                         debug("bad #size-cells\n");
612                         return FDT_ADDR_T_NONE;
613                 }
614
615                 reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", &len);
616                 if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
617                         debug("Req index out of range\n");
618                         return FDT_ADDR_T_NONE;
619                 }
620
621                 reg += index * (na + ns);
622
623                 /*
624                  * Use the full-fledged translate function for complex
625                  * bus setups.
626                  */
627                 addr = fdt_translate_address((void *)gd->fdt_blob,
628                                              dev->of_offset, reg);
629         } else {
630                 /*
631                  * Use the "simple" translate function for less complex
632                  * bus setups.
633                  */
634                 addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
635                                                         dev->parent->of_offset,
636                                                         dev->of_offset, "reg",
637                                                         index, NULL);
638                 if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
639                         if (device_get_uclass_id(dev->parent) ==
640                             UCLASS_SIMPLE_BUS)
641                                 addr = simple_bus_translate(dev->parent, addr);
642                 }
643         }
644
645         /*
646          * Some platforms need a special address translation. Those
647          * platforms (e.g. mvebu in SPL) can configure a translation
648          * offset in the DM by calling dm_set_translation_offset() that
649          * will get added to all addresses returned by dev_get_addr().
650          */
651         addr += dm_get_translation_offset();
652
653         return addr;
654 #else
655         return FDT_ADDR_T_NONE;
656 #endif
657 }
658
659 fdt_addr_t dev_get_addr(struct udevice *dev)
660 {
661         return dev_get_addr_index(dev, 0);
662 }
663
664 bool device_has_children(struct udevice *dev)
665 {
666         return !list_empty(&dev->child_head);
667 }
668
669 bool device_has_active_children(struct udevice *dev)
670 {
671         struct udevice *child;
672
673         for (device_find_first_child(dev, &child);
674              child;
675              device_find_next_child(&child)) {
676                 if (device_active(child))
677                         return true;
678         }
679
680         return false;
681 }
682
683 bool device_is_last_sibling(struct udevice *dev)
684 {
685         struct udevice *parent = dev->parent;
686
687         if (!parent)
688                 return false;
689         return list_is_last(&dev->sibling_node, &parent->child_head);
690 }
691
692 int device_set_name(struct udevice *dev, const char *name)
693 {
694         name = strdup(name);
695         if (!name)
696                 return -ENOMEM;
697         dev->name = name;
698
699         return 0;
700 }