[people/ms/u-boot.git] / drivers / core / device.c

/*
 * Device manager
 *
 * Copyright (c) 2013 Google, Inc
 *
 * (C) Copyright 2012
 * Pavel Herrmann <morpheus.ibis@gmail.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <fdtdec.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/platdata.h>
#include <dm/uclass.h>
#include <dm/uclass-internal.h>
#include <dm/util.h>
#include <linux/err.h>
#include <linux/list.h>

DECLARE_GLOBAL_DATA_PTR;

int device_bind(struct udevice *parent, const struct driver *drv,
		const char *name, void *platdata, int of_offset,
		struct udevice **devp)
{
	struct udevice *dev;
	struct uclass *uc;
	int size, ret = 0;

	*devp = NULL;
	if (!name)
		return -EINVAL;

	ret = uclass_get(drv->id, &uc);
	if (ret)
		return ret;

	dev = calloc(1, sizeof(struct udevice));
	if (!dev)
		return -ENOMEM;

	INIT_LIST_HEAD(&dev->sibling_node);
	INIT_LIST_HEAD(&dev->child_head);
	INIT_LIST_HEAD(&dev->uclass_node);
	dev->platdata = platdata;
	dev->name = name;
	dev->of_offset = of_offset;
	dev->parent = parent;
	dev->driver = drv;
	dev->uclass = uc;

	dev->seq = -1;
	dev->req_seq = -1;
	if (IS_ENABLED(CONFIG_OF_CONTROL) && IS_ENABLED(CONFIG_DM_SEQ_ALIAS)) {
		/*
		* Some devices, such as a SPI bus, I2C bus and serial ports
		* are numbered using aliases.
		*
		* This is just a 'requested' sequence, and will be
		* resolved (and ->seq updated) when the device is probed.
		*/
		if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
			if (uc->uc_drv->name && of_offset != -1) {
				fdtdec_get_alias_seq(gd->fdt_blob,
						uc->uc_drv->name, of_offset,
						&dev->req_seq);
			}
		}
	}

	if (!dev->platdata && drv->platdata_auto_alloc_size) {
		dev->flags |= DM_FLAG_ALLOC_PDATA;
		dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
		if (!dev->platdata) {
			ret = -ENOMEM;
			goto fail_alloc1;
		}
	}

	size = uc->uc_drv->per_device_platdata_auto_alloc_size;
	if (size) {
		dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA;
		dev->uclass_platdata = calloc(1, size);
		if (!dev->uclass_platdata) {
			ret = -ENOMEM;
			goto fail_alloc2;
		}
	}

	if (parent) {
		size = parent->driver->per_child_platdata_auto_alloc_size;
		if (!size) {
			size = parent->uclass->uc_drv->
					per_child_platdata_auto_alloc_size;
		}
		if (size) {
			dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA;
			dev->parent_platdata = calloc(1, size);
			if (!dev->parent_platdata) {
				ret = -ENOMEM;
				goto fail_alloc3;
			}
		}
	}

	/* put dev into parent's successor list */
	if (parent)
		list_add_tail(&dev->sibling_node, &parent->child_head);

	ret = uclass_bind_device(dev);
	if (ret)
		goto fail_uclass_bind;

	/* if we fail to bind we remove device from successors and free it */
	if (drv->bind) {
		ret = drv->bind(dev);
		if (ret)
			goto fail_bind;
	}
	if (parent && parent->driver->child_post_bind) {
		ret = parent->driver->child_post_bind(dev);
		if (ret)
			goto fail_child_post_bind;
	}

	if (parent)
		dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
	*devp = dev;

	return 0;

fail_child_post_bind:
	if (IS_ENABLED(CONFIG_DM_DEVICE_REMOVE)) {
		if (drv->unbind && drv->unbind(dev)) {
			dm_warn("unbind() method failed on dev '%s' on error path\n",
				dev->name);
		}
	}

fail_bind:
	if (IS_ENABLED(CONFIG_DM_DEVICE_REMOVE)) {
		if (uclass_unbind_device(dev)) {
			dm_warn("Failed to unbind dev '%s' on error path\n",
				dev->name);
		}
	}
fail_uclass_bind:
	if (IS_ENABLED(CONFIG_DM_DEVICE_REMOVE)) {
		list_del(&dev->sibling_node);
		if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
			free(dev->parent_platdata);
			dev->parent_platdata = NULL;
		}
	}
fail_alloc3:
	if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
		free(dev->uclass_platdata);
		dev->uclass_platdata = NULL;
	}
fail_alloc2:
	if (dev->flags & DM_FLAG_ALLOC_PDATA) {
		free(dev->platdata);
		dev->platdata = NULL;
	}
fail_alloc1:
	free(dev);

	return ret;
}

int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
			const struct driver_info *info, struct udevice **devp)
{
	struct driver *drv;

	drv = lists_driver_lookup_name(info->name);
	if (!drv)
		return -ENOENT;
	if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
		return -EPERM;

	return device_bind(parent, drv, info->name, (void *)info->platdata,
			   -1, devp);
}

static void *alloc_priv(int size, uint flags)
{
	void *priv;

	if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
		priv = memalign(ARCH_DMA_MINALIGN, size);
		if (priv)
			memset(priv, '\0', size);
	} else {
		priv = calloc(1, size);
	}

	return priv;
}

int device_probe_child(struct udevice *dev, void *parent_priv)
{
	const struct driver *drv;
	int size = 0;
	int ret;
	int seq;

	if (!dev)
		return -EINVAL;

	if (dev->flags & DM_FLAG_ACTIVATED)
		return 0;

	drv = dev->driver;
	assert(drv);

	/* Allocate private data if requested */
	if (drv->priv_auto_alloc_size) {
		dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
		if (!dev->priv) {
			ret = -ENOMEM;
			goto fail;
		}
	}
	/* Allocate private data if requested */
	size = dev->uclass->uc_drv->per_device_auto_alloc_size;
	if (size) {
		dev->uclass_priv = calloc(1, size);
		if (!dev->uclass_priv) {
			ret = -ENOMEM;
			goto fail;
		}
	}

	/* Ensure all parents are probed */
	if (dev->parent) {
		size = dev->parent->driver->per_child_auto_alloc_size;
		if (!size) {
			size = dev->parent->uclass->uc_drv->
					per_child_auto_alloc_size;
		}
		if (size) {
			dev->parent_priv = alloc_priv(size, drv->flags);
			if (!dev->parent_priv) {
				ret = -ENOMEM;
				goto fail;
			}
			if (parent_priv)
				memcpy(dev->parent_priv, parent_priv, size);
		}

		ret = device_probe(dev->parent);
		if (ret)
			goto fail;
	}

	seq = uclass_resolve_seq(dev);
	if (seq < 0) {
		ret = seq;
		goto fail;
	}
	dev->seq = seq;

	dev->flags |= DM_FLAG_ACTIVATED;

	ret = uclass_pre_probe_device(dev);
	if (ret)
		goto fail;

	if (dev->parent && dev->parent->driver->child_pre_probe) {
		ret = dev->parent->driver->child_pre_probe(dev);
		if (ret)
			goto fail;
	}

	if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
		ret = drv->ofdata_to_platdata(dev);
		if (ret)
			goto fail;
	}

	if (drv->probe) {
		ret = drv->probe(dev);
		if (ret) {
			dev->flags &= ~DM_FLAG_ACTIVATED;
			goto fail;
		}
	}

	ret = uclass_post_probe_device(dev);
	if (ret)
		goto fail_uclass;

	return 0;
fail_uclass:
	if (device_remove(dev)) {
		dm_warn("%s: Device '%s' failed to remove on error path\n",
			__func__, dev->name);
	}
fail:
	dev->flags &= ~DM_FLAG_ACTIVATED;

	dev->seq = -1;
	device_free(dev);

	return ret;
}

int device_probe(struct udevice *dev)
{
	return device_probe_child(dev, NULL);
}

void *dev_get_platdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->platdata;
}

void *dev_get_parent_platdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->parent_platdata;
}

void *dev_get_uclass_platdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->uclass_platdata;
}

void *dev_get_priv(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->priv;
}

void *dev_get_uclass_priv(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->uclass_priv;
}

void *dev_get_parentdata(struct udevice *dev)
{
	if (!dev) {
		dm_warn("%s: null device\n", __func__);
		return NULL;
	}

	return dev->parent_priv;
}

static int device_get_device_tail(struct udevice *dev, int ret,
				  struct udevice **devp)
{
	if (ret)
		return ret;

	ret = device_probe(dev);
	if (ret)
		return ret;

	*devp = dev;

	return 0;
}

int device_get_child(struct udevice *parent, int index, struct udevice **devp)
{
	struct udevice *dev;

	list_for_each_entry(dev, &parent->child_head, sibling_node) {
		if (!index--)
			return device_get_device_tail(dev, 0, devp);
	}

	return -ENODEV;
}

int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
			     bool find_req_seq, struct udevice **devp)
{
	struct udevice *dev;

	*devp = NULL;
	if (seq_or_req_seq == -1)
		return -ENODEV;

	list_for_each_entry(dev, &parent->child_head, sibling_node) {
		if ((find_req_seq ? dev->req_seq : dev->seq) ==
				seq_or_req_seq) {
			*devp = dev;
			return 0;
		}
	}

	return -ENODEV;
}

int device_get_child_by_seq(struct udevice *parent, int seq,
			    struct udevice **devp)
{
	struct udevice *dev;
	int ret;

	*devp = NULL;
	ret = device_find_child_by_seq(parent, seq, false, &dev);
	if (ret == -ENODEV) {
		/*
		 * We didn't find it in probed devices. See if there is one
		 * that will request this seq if probed.
		 */
		ret = device_find_child_by_seq(parent, seq, true, &dev);
	}
	return device_get_device_tail(dev, ret, devp);
}

int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
				   struct udevice **devp)
{
	struct udevice *dev;

	*devp = NULL;

	list_for_each_entry(dev, &parent->child_head, sibling_node) {
		if (dev->of_offset == of_offset) {
			*devp = dev;
			return 0;
		}
	}

	return -ENODEV;
}

int device_get_child_by_of_offset(struct udevice *parent, int node,
				  struct udevice **devp)
{
	struct udevice *dev;
	int ret;

	*devp = NULL;
	ret = device_find_child_by_of_offset(parent, node, &dev);
	return device_get_device_tail(dev, ret, devp);
}

static struct udevice *_device_find_global_by_of_offset(struct udevice *parent,
							int of_offset)
{
	struct udevice *dev, *found;

	if (parent->of_offset == of_offset)
		return parent;

	list_for_each_entry(dev, &parent->child_head, sibling_node) {
		found = _device_find_global_by_of_offset(dev, of_offset);
		if (found)
			return found;
	}

	return NULL;
}

int device_get_global_by_of_offset(int of_offset, struct udevice **devp)
{
	struct udevice *dev;

	dev = _device_find_global_by_of_offset(gd->dm_root, of_offset);
	return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
}

int device_find_first_child(struct udevice *parent, struct udevice **devp)
{
	if (list_empty(&parent->child_head)) {
		*devp = NULL;
	} else {
		*devp = list_first_entry(&parent->child_head, struct udevice,
					 sibling_node);
	}

	return 0;
}

int device_find_next_child(struct udevice **devp)
{
	struct udevice *dev = *devp;
	struct udevice *parent = dev->parent;

	if (list_is_last(&dev->sibling_node, &parent->child_head)) {
		*devp = NULL;
	} else {
		*devp = list_entry(dev->sibling_node.next, struct udevice,
				   sibling_node);
	}

	return 0;
}

struct udevice *dev_get_parent(struct udevice *child)
{
	return child->parent;
}

ulong dev_get_driver_data(struct udevice *dev)
{
	return dev->driver_data;
}

const void *dev_get_driver_ops(struct udevice *dev)
{
	if (!dev || !dev->driver->ops)
		return NULL;

	return dev->driver->ops;
}

enum uclass_id device_get_uclass_id(struct udevice *dev)
{
	return dev->uclass->uc_drv->id;
}

const char *dev_get_uclass_name(struct udevice *dev)
{
	if (!dev)
		return NULL;

	return dev->uclass->uc_drv->name;
}

#ifdef CONFIG_OF_CONTROL
fdt_addr_t dev_get_addr(struct udevice *dev)
{
	return fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
}
#else
fdt_addr_t dev_get_addr(struct udevice *dev)
{
	return FDT_ADDR_T_NONE;
}
#endif

bool device_has_children(struct udevice *dev)
{
	return !list_empty(&dev->child_head);
}

bool device_has_active_children(struct udevice *dev)
{
	struct udevice *child;

	for (device_find_first_child(dev, &child);
	     child;
	     device_find_next_child(&child)) {
		if (device_active(child))
			return true;
	}

	return false;
}

bool device_is_last_sibling(struct udevice *dev)
{
	struct udevice *parent = dev->parent;

	if (!parent)
		return false;
	return list_is_last(&dev->sibling_node, &parent->child_head);
}
Commit	Line	Data
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>
5a66a8ff	13	#include <fdtdec.h>
6494d708 SG	14	#include <malloc.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/uclass.h>
	20	#include <dm/uclass-internal.h>
	21	#include <dm/util.h>
	22	#include <linux/err.h>
	23	#include <linux/list.h>
	24
5a66a8ff SG	25	DECLARE_GLOBAL_DATA_PTR;
5a66a8ff SG	26
3479253d SG	27	int device_bind(struct udevice parent, const struct driver drv,
	28	const char name, void platdata, int of_offset,
	29	struct udevice **devp)
6494d708	30	{
54c5d08a	31	struct udevice *dev;
6494d708	32	struct uclass *uc;
5eaed880	33	int size, ret = 0;
6494d708 SG	34
	35	*devp = NULL;
	36	if (!name)
	37	return -EINVAL;
	38
	39	ret = uclass_get(drv->id, &uc);
	40	if (ret)
	41	return ret;
	42
54c5d08a	43	dev = calloc(1, sizeof(struct udevice));
6494d708 SG	44	if (!dev)
	45	return -ENOMEM;
	46
	47	INIT_LIST_HEAD(&dev->sibling_node);
	48	INIT_LIST_HEAD(&dev->child_head);
	49	INIT_LIST_HEAD(&dev->uclass_node);
	50	dev->platdata = platdata;
	51	dev->name = name;
	52	dev->of_offset = of_offset;
	53	dev->parent = parent;
	54	dev->driver = drv;
	55	dev->uclass = uc;
5a66a8ff	56
5a66a8ff	57	dev->seq = -1;
9cc36a2b	58	dev->req_seq = -1;
36fa61dc SG	59	if (IS_ENABLED(CONFIG_OF_CONTROL) && IS_ENABLED(CONFIG_DM_SEQ_ALIAS)) {
	60	/*
	61	* Some devices, such as a SPI bus, I2C bus and serial ports
	62	* are numbered using aliases.
	63	*
	64	* This is just a 'requested' sequence, and will be
	65	* resolved (and ->seq updated) when the device is probed.
	66	*/
	67	if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
	68	if (uc->uc_drv->name && of_offset != -1) {
	69	fdtdec_get_alias_seq(gd->fdt_blob,
	70	uc->uc_drv->name, of_offset,
	71	&dev->req_seq);
	72	}
9cc36a2b	73	}
5a66a8ff	74	}
36fa61dc	75
f8a85449	76	if (!dev->platdata && drv->platdata_auto_alloc_size) {
6494d708	77	dev->flags \|= DM_FLAG_ALLOC_PDATA;
f8a85449 SG	78	dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
	79	if (!dev->platdata) {
	80	ret = -ENOMEM;
	81	goto fail_alloc1;
	82	}
	83	}
cdc133bd	84
5eaed880 PM	85	size = uc->uc_drv->per_device_platdata_auto_alloc_size;
	86	if (size) {
	87	dev->flags \|= DM_FLAG_ALLOC_UCLASS_PDATA;
	88	dev->uclass_platdata = calloc(1, size);
	89	if (!dev->uclass_platdata) {
	90	ret = -ENOMEM;
	91	goto fail_alloc2;
	92	}
	93	}
	94
	95	if (parent) {
	96	size = parent->driver->per_child_platdata_auto_alloc_size;
ba8da9dc SG	97	if (!size) {
	98	size = parent->uclass->uc_drv->
	99	per_child_platdata_auto_alloc_size;
	100	}
cdc133bd SG	101	if (size) {
	102	dev->flags \|= DM_FLAG_ALLOC_PARENT_PDATA;
	103	dev->parent_platdata = calloc(1, size);
	104	if (!dev->parent_platdata) {
	105	ret = -ENOMEM;
5eaed880	106	goto fail_alloc3;
cdc133bd SG	107	}
	108	}
	109	}
6494d708 SG	110
	111	/* put dev into parent's successor list */
	112	if (parent)
	113	list_add_tail(&dev->sibling_node, &parent->child_head);
	114
	115	ret = uclass_bind_device(dev);
	116	if (ret)
72ebfe86	117	goto fail_uclass_bind;
6494d708 SG	118
	119	/* if we fail to bind we remove device from successors and free it */
	120	if (drv->bind) {
	121	ret = drv->bind(dev);
72ebfe86	122	if (ret)
6494d708	123	goto fail_bind;
6494d708	124	}
0118ce79 SG	125	if (parent && parent->driver->child_post_bind) {
	126	ret = parent->driver->child_post_bind(dev);
	127	if (ret)
	128	goto fail_child_post_bind;
	129	}
	130
6494d708 SG	131	if (parent)
	132	dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
	133	*devp = dev;
	134
	135	return 0;
	136
0118ce79	137	fail_child_post_bind:
f0f932d6	138	if (IS_ENABLED(CONFIG_DM_DEVICE_REMOVE)) {
5a87c417 SG	139	if (drv->unbind && drv->unbind(dev)) {
	140	dm_warn("unbind() method failed on dev '%s' on error path\n",
	141	dev->name);
	142	}
0118ce79 SG	143	}
0118ce79 SG	144
6494d708	145	fail_bind:
f0f932d6	146	if (IS_ENABLED(CONFIG_DM_DEVICE_REMOVE)) {
5a87c417 SG	147	if (uclass_unbind_device(dev)) {
	148	dm_warn("Failed to unbind dev '%s' on error path\n",
	149	dev->name);
	150	}
72ebfe86 SG	151	}
72ebfe86 SG	152	fail_uclass_bind:
f0f932d6	153	if (IS_ENABLED(CONFIG_DM_DEVICE_REMOVE)) {
5a87c417 SG	154	list_del(&dev->sibling_node);
	155	if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
	156	free(dev->parent_platdata);
	157	dev->parent_platdata = NULL;
	158	}
cdc133bd	159	}
5eaed880 PM	160	fail_alloc3:
	161	if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
	162	free(dev->uclass_platdata);
	163	dev->uclass_platdata = NULL;
	164	}
cdc133bd	165	fail_alloc2:
f8a85449 SG	166	if (dev->flags & DM_FLAG_ALLOC_PDATA) {
	167	free(dev->platdata);
	168	dev->platdata = NULL;
	169	}
	170	fail_alloc1:
6494d708	171	free(dev);
72ebfe86	172
6494d708 SG	173	return ret;
	174	}
	175
00606d7e SG	176	int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
00606d7e SG	177	const struct driver_info info, struct udevice *devp)
6494d708 SG	178	{
	179	struct driver *drv;
	180
	181	drv = lists_driver_lookup_name(info->name);
	182	if (!drv)
	183	return -ENOENT;
00606d7e SG	184	if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
00606d7e SG	185	return -EPERM;
6494d708 SG	186
	187	return device_bind(parent, drv, info->name, (void *)info->platdata,
	188	-1, devp);
	189	}
	190
2c03c463 SG	191	static void *alloc_priv(int size, uint flags)
	192	{
	193	void *priv;
	194
	195	if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
	196	priv = memalign(ARCH_DMA_MINALIGN, size);
	197	if (priv)
	198	memset(priv, '\0', size);
	199	} else {
	200	priv = calloc(1, size);
	201	}
	202
	203	return priv;
	204	}
	205
accd4b19	206	int device_probe_child(struct udevice dev, void parent_priv)
6494d708	207	{
3479253d	208	const struct driver *drv;
6494d708 SG	209	int size = 0;
6494d708 SG	210	int ret;
5a66a8ff	211	int seq;
6494d708 SG	212
	213	if (!dev)
	214	return -EINVAL;
	215
	216	if (dev->flags & DM_FLAG_ACTIVATED)
	217	return 0;
	218
	219	drv = dev->driver;
	220	assert(drv);
	221
f8a85449	222	/* Allocate private data if requested */
6494d708	223	if (drv->priv_auto_alloc_size) {
2c03c463	224	dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
6494d708 SG	225	if (!dev->priv) {
	226	ret = -ENOMEM;
	227	goto fail;
	228	}
	229	}
	230	/* Allocate private data if requested */
6494d708 SG	231	size = dev->uclass->uc_drv->per_device_auto_alloc_size;
	232	if (size) {
	233	dev->uclass_priv = calloc(1, size);
	234	if (!dev->uclass_priv) {
	235	ret = -ENOMEM;
	236	goto fail;
	237	}
	238	}
	239
	240	/* Ensure all parents are probed */
	241	if (dev->parent) {
e59f458d	242	size = dev->parent->driver->per_child_auto_alloc_size;
dac8db2c SG	243	if (!size) {
	244	size = dev->parent->uclass->uc_drv->
	245	per_child_auto_alloc_size;
	246	}
e59f458d	247	if (size) {
2c03c463	248	dev->parent_priv = alloc_priv(size, drv->flags);
e59f458d SG	249	if (!dev->parent_priv) {
	250	ret = -ENOMEM;
	251	goto fail;
	252	}
accd4b19 SG	253	if (parent_priv)
accd4b19 SG	254	memcpy(dev->parent_priv, parent_priv, size);
e59f458d SG	255	}
e59f458d SG	256
6494d708 SG	257	ret = device_probe(dev->parent);
	258	if (ret)
	259	goto fail;
	260	}
	261
5a66a8ff SG	262	seq = uclass_resolve_seq(dev);
	263	if (seq < 0) {
	264	ret = seq;
	265	goto fail;
	266	}
	267	dev->seq = seq;
	268
206d4d2b SG	269	dev->flags \|= DM_FLAG_ACTIVATED;
206d4d2b SG	270
02c07b37	271	ret = uclass_pre_probe_device(dev);
83c7e434 SG	272	if (ret)
	273	goto fail;
	274
a327dee0 SG	275	if (dev->parent && dev->parent->driver->child_pre_probe) {
	276	ret = dev->parent->driver->child_pre_probe(dev);
	277	if (ret)
	278	goto fail;
	279	}
	280
6494d708 SG	281	if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
	282	ret = drv->ofdata_to_platdata(dev);
	283	if (ret)
	284	goto fail;
	285	}
	286
	287	if (drv->probe) {
	288	ret = drv->probe(dev);
02eeb1bb SG	289	if (ret) {
02eeb1bb SG	290	dev->flags &= ~DM_FLAG_ACTIVATED;
6494d708	291	goto fail;
02eeb1bb	292	}
6494d708 SG	293	}
6494d708 SG	294
6494d708	295	ret = uclass_post_probe_device(dev);
206d4d2b	296	if (ret)
6494d708	297	goto fail_uclass;
6494d708 SG	298
	299	return 0;
	300	fail_uclass:
	301	if (device_remove(dev)) {
	302	dm_warn("%s: Device '%s' failed to remove on error path\n",
	303	__func__, dev->name);
	304	}
	305	fail:
206d4d2b SG	306	dev->flags &= ~DM_FLAG_ACTIVATED;
206d4d2b SG	307
5a66a8ff	308	dev->seq = -1;
6494d708 SG	309	device_free(dev);
	310
	311	return ret;
	312	}
	313
accd4b19 SG	314	int device_probe(struct udevice *dev)
	315	{
	316	return device_probe_child(dev, NULL);
	317	}
	318
54c5d08a	319	void dev_get_platdata(struct udevice dev)
6494d708 SG	320	{
6494d708 SG	321	if (!dev) {
964d153c	322	dm_warn("%s: null device\n", __func__);
6494d708 SG	323	return NULL;
	324	}
	325
	326	return dev->platdata;
	327	}
	328
cdc133bd SG	329	void dev_get_parent_platdata(struct udevice dev)
	330	{
	331	if (!dev) {
36d7cc17	332	dm_warn("%s: null device\n", __func__);
cdc133bd SG	333	return NULL;
	334	}
	335
	336	return dev->parent_platdata;
	337	}
	338
5eaed880 PM	339	void dev_get_uclass_platdata(struct udevice dev)
	340	{
	341	if (!dev) {
36d7cc17	342	dm_warn("%s: null device\n", __func__);
5eaed880 PM	343	return NULL;
	344	}
	345
	346	return dev->uclass_platdata;
	347	}
	348
54c5d08a	349	void dev_get_priv(struct udevice dev)
6494d708 SG	350	{
6494d708 SG	351	if (!dev) {
964d153c	352	dm_warn("%s: null device\n", __func__);
6494d708 SG	353	return NULL;
	354	}
	355
	356	return dev->priv;
	357	}
997c87bb	358
e564f054 SG	359	void dev_get_uclass_priv(struct udevice dev)
	360	{
	361	if (!dev) {
	362	dm_warn("%s: null device\n", __func__);
	363	return NULL;
	364	}
	365
	366	return dev->uclass_priv;
	367	}
	368
e59f458d SG	369	void dev_get_parentdata(struct udevice dev)
	370	{
	371	if (!dev) {
964d153c	372	dm_warn("%s: null device\n", __func__);
e59f458d SG	373	return NULL;
	374	}
	375
	376	return dev->parent_priv;
	377	}
	378
997c87bb SG	379	static int device_get_device_tail(struct udevice *dev, int ret,
	380	struct udevice **devp)
	381	{
	382	if (ret)
	383	return ret;
	384
	385	ret = device_probe(dev);
	386	if (ret)
	387	return ret;
	388
	389	*devp = dev;
	390
	391	return 0;
	392	}
	393
	394	int device_get_child(struct udevice parent, int index, struct udevice *devp)
	395	{
	396	struct udevice *dev;
	397
	398	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	399	if (!index--)
	400	return device_get_device_tail(dev, 0, devp);
	401	}
	402
	403	return -ENODEV;
	404	}
	405
	406	int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
	407	bool find_req_seq, struct udevice **devp)
	408	{
	409	struct udevice *dev;
	410
	411	*devp = NULL;
	412	if (seq_or_req_seq == -1)
	413	return -ENODEV;
	414
	415	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	416	if ((find_req_seq ? dev->req_seq : dev->seq) ==
	417	seq_or_req_seq) {
	418	*devp = dev;
	419	return 0;
	420	}
	421	}
	422
	423	return -ENODEV;
	424	}
	425
	426	int device_get_child_by_seq(struct udevice *parent, int seq,
	427	struct udevice **devp)
	428	{
	429	struct udevice *dev;
	430	int ret;
	431
	432	*devp = NULL;
	433	ret = device_find_child_by_seq(parent, seq, false, &dev);
	434	if (ret == -ENODEV) {
	435	/*
	436	* We didn't find it in probed devices. See if there is one
	437	* that will request this seq if probed.
	438	*/
	439	ret = device_find_child_by_seq(parent, seq, true, &dev);
	440	}
	441	return device_get_device_tail(dev, ret, devp);
	442	}
443
444	int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
445	struct udevice **devp)
446	{
447	struct udevice *dev;
448
449	*devp = NULL;
450
451	list_for_each_entry(dev, &parent->child_head, sibling_node) {
452	if (dev->of_offset == of_offset) {
453	*devp = dev;
454	return 0;
455	}
456	}
457
458	return -ENODEV;
459	}
460
132f9bfc	461	int device_get_child_by_of_offset(struct udevice *parent, int node,
997c87bb SG	462	struct udevice **devp)
	463	{
	464	struct udevice *dev;
	465	int ret;
	466
	467	*devp = NULL;
132f9bfc	468	ret = device_find_child_by_of_offset(parent, node, &dev);
997c87bb SG	469	return device_get_device_tail(dev, ret, devp);
997c87bb SG	470	}
a8981d4f	471
2693047a SG	472	static struct udevice _device_find_global_by_of_offset(struct udevice parent,
	473	int of_offset)
	474	{
	475	struct udevice dev, found;
	476
	477	if (parent->of_offset == of_offset)
	478	return parent;
	479
	480	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	481	found = _device_find_global_by_of_offset(dev, of_offset);
	482	if (found)
	483	return found;
	484	}
	485
	486	return NULL;
	487	}
	488
	489	int device_get_global_by_of_offset(int of_offset, struct udevice **devp)
	490	{
	491	struct udevice *dev;
	492
	493	dev = _device_find_global_by_of_offset(gd->dm_root, of_offset);
	494	return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
	495	}
	496
a8981d4f SG	497	int device_find_first_child(struct udevice parent, struct udevice *devp)
	498	{
	499	if (list_empty(&parent->child_head)) {
	500	*devp = NULL;
	501	} else {
	502	*devp = list_first_entry(&parent->child_head, struct udevice,
	503	sibling_node);
	504	}
	505
	506	return 0;
	507	}
	508
	509	int device_find_next_child(struct udevice **devp)
	510	{
	511	struct udevice dev = devp;
	512	struct udevice *parent = dev->parent;
	513
	514	if (list_is_last(&dev->sibling_node, &parent->child_head)) {
	515	*devp = NULL;
	516	} else {
	517	*devp = list_entry(dev->sibling_node.next, struct udevice,
	518	sibling_node);
	519	}
	520
	521	return 0;
	522	}
2ef249b4	523
479728cb SG	524	struct udevice dev_get_parent(struct udevice child)
	525	{
	526	return child->parent;
	527	}
	528
39de8433	529	ulong dev_get_driver_data(struct udevice *dev)
2ef249b4	530	{
39de8433	531	return dev->driver_data;
2ef249b4	532	}
b3670531	533
cc73d37b PM	534	const void dev_get_driver_ops(struct udevice dev)
	535	{
	536	if (!dev \|\| !dev->driver->ops)
	537	return NULL;
	538
	539	return dev->driver->ops;
	540	}
	541
b3670531 SG	542	enum uclass_id device_get_uclass_id(struct udevice *dev)
	543	{
	544	return dev->uclass->uc_drv->id;
	545	}
c9cac3f8	546
f9c370dc PM	547	const char dev_get_uclass_name(struct udevice dev)
	548	{
	549	if (!dev)
	550	return NULL;
	551
	552	return dev->uclass->uc_drv->name;
	553	}
	554
c9cac3f8 PF	555	#ifdef CONFIG_OF_CONTROL
	556	fdt_addr_t dev_get_addr(struct udevice *dev)
	557	{
	558	return fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
	559	}
	560	#else
	561	fdt_addr_t dev_get_addr(struct udevice *dev)
	562	{
	563	return FDT_ADDR_T_NONE;
	564	}
	565	#endif
c5785673 SG	566
	567	bool device_has_children(struct udevice *dev)
	568	{
	569	return !list_empty(&dev->child_head);
	570	}
	571
	572	bool device_has_active_children(struct udevice *dev)
	573	{
	574	struct udevice *child;
	575
	576	for (device_find_first_child(dev, &child);
	577	child;
	578	device_find_next_child(&child)) {
	579	if (device_active(child))
	580	return true;
	581	}
	582
	583	return false;
	584	}
	585
	586	bool device_is_last_sibling(struct udevice *dev)
	587	{
	588	struct udevice *parent = dev->parent;
	589
	590	if (!parent)
	591	return false;
	592	return list_is_last(&dev->sibling_node, &parent->child_head);
	593	}