[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 <fdt_support.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/pinctrl.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;

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

	ret = uclass_get(drv->id, &uc);
	if (ret) {
		debug("Missing uclass for driver %s\n", drv->name);
		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);
#ifdef CONFIG_DEVRES
	INIT_LIST_HEAD(&dev->devres_head);
#endif
	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 (CONFIG_IS_ENABLED(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);
	if (devp)
		*devp = dev;

	dev->flags |= DM_FLAG_BOUND;

	return 0;

fail_child_post_bind:
	if (CONFIG_IS_ENABLED(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 (CONFIG_IS_ENABLED(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 (CONFIG_IS_ENABLED(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:
	devres_release_all(dev);

	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 and not reentered */
	if (drv->priv_auto_alloc_size && !dev->priv) {
		dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
		if (!dev->priv) {
			ret = -ENOMEM;
			goto fail;
		}
	}
	/* Allocate private data if requested and not reentered */
	size = dev->uclass->uc_drv->per_device_auto_alloc_size;
	if (size && !dev->uclass_priv) {
		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) {
			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;

		/*
		 * The device might have already been probed during
		 * the call to device_probe() on its parent device
		 * (e.g. PCI bridge devices). Test the flags again
		 * so that we don't mess up the device.
		 */
		if (dev->flags & DM_FLAG_ACTIVATED)
			return 0;
	}

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

	dev->flags |= DM_FLAG_ACTIVATED;

	/*
	 * Process pinctrl for everything except the root device, and
	 * continue regardless of the result of pinctrl.
	 */
	if (dev->parent)
		pinctrl_select_state(dev, "default");

	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_parent_priv(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;
}

fdt_addr_t dev_get_addr(struct udevice *dev)
{
#if CONFIG_IS_ENABLED(OF_CONTROL)
	fdt_addr_t addr;

	if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
		const fdt32_t *reg;

		reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", NULL);
		if (!reg)
			return FDT_ADDR_T_NONE;

		/*
		 * Use the full-fledged translate function for complex
		 * bus setups.
		 */
		return fdt_translate_address((void *)gd->fdt_blob,
					     dev->of_offset, reg);
	}

	/*
	 * Use the "simple" translate function for less complex
	 * bus setups.
	 */
	addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
						dev->parent->of_offset,
						dev->of_offset, "reg",
						0, NULL);
	if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
		if (device_get_uclass_id(dev->parent) == UCLASS_SIMPLE_BUS)
			addr = simple_bus_translate(dev->parent, addr);
	}

	return addr;
#else
	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);
}

int device_set_name(struct udevice *dev, const char *name)
{
	name = strdup(name);
	if (!name)
		return -ENOMEM;
	dev->name = name;

	return 0;
}
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>
ef5cd330	14	#include <fdt_support.h>
6494d708 SG	15	#include <malloc.h>
	16	#include <dm/device.h>
	17	#include <dm/device-internal.h>
	18	#include <dm/lists.h>
d90a5a30	19	#include <dm/pinctrl.h>
6494d708 SG	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
5a66a8ff SG	27	DECLARE_GLOBAL_DATA_PTR;
5a66a8ff SG	28
3479253d SG	29	int device_bind(struct udevice parent, const struct driver drv,
	30	const char name, void platdata, int of_offset,
	31	struct udevice **devp)
6494d708	32	{
54c5d08a	33	struct udevice *dev;
6494d708	34	struct uclass *uc;
5eaed880	35	int size, ret = 0;
6494d708	36
e6cabe4a MY	37	if (devp)
e6cabe4a MY	38	*devp = NULL;
6494d708 SG	39	if (!name)
	40	return -EINVAL;
	41
	42	ret = uclass_get(drv->id, &uc);
3346c876 SG	43	if (ret) {
3346c876 SG	44	debug("Missing uclass for driver %s\n", drv->name);
6494d708	45	return ret;
3346c876	46	}
6494d708	47
54c5d08a	48	dev = calloc(1, sizeof(struct udevice));
6494d708 SG	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);
e2282d70	55	#ifdef CONFIG_DEVRES
608f26c5	56	INIT_LIST_HEAD(&dev->devres_head);
e2282d70	57	#endif
6494d708 SG	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;
5a66a8ff	64
5a66a8ff	65	dev->seq = -1;
9cc36a2b	66	dev->req_seq = -1;
0f925822	67	if (CONFIG_IS_ENABLED(OF_CONTROL) && IS_ENABLED(CONFIG_DM_SEQ_ALIAS)) {
36fa61dc SG	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	}
9cc36a2b	81	}
5a66a8ff	82	}
36fa61dc	83
f8a85449	84	if (!dev->platdata && drv->platdata_auto_alloc_size) {
6494d708	85	dev->flags \|= DM_FLAG_ALLOC_PDATA;
f8a85449 SG	86	dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
	87	if (!dev->platdata) {
	88	ret = -ENOMEM;
	89	goto fail_alloc1;
	90	}
	91	}
cdc133bd	92
5eaed880 PM	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;
ba8da9dc SG	105	if (!size) {
	106	size = parent->uclass->uc_drv->
	107	per_child_platdata_auto_alloc_size;
	108	}
cdc133bd SG	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;
5eaed880	114	goto fail_alloc3;
cdc133bd SG	115	}
	116	}
	117	}
6494d708 SG	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)
72ebfe86	125	goto fail_uclass_bind;
6494d708 SG	126
	127	/* if we fail to bind we remove device from successors and free it */
	128	if (drv->bind) {
	129	ret = drv->bind(dev);
72ebfe86	130	if (ret)
6494d708	131	goto fail_bind;
6494d708	132	}
0118ce79 SG	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
6494d708 SG	139	if (parent)
6494d708 SG	140	dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
e6cabe4a MY	141	if (devp)
e6cabe4a MY	142	*devp = dev;
6494d708	143
aed1a4dd MY	144	dev->flags \|= DM_FLAG_BOUND;
aed1a4dd MY	145
6494d708 SG	146	return 0;
6494d708 SG	147
0118ce79	148	fail_child_post_bind:
0a5804b5	149	if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
5a87c417 SG	150	if (drv->unbind && drv->unbind(dev)) {
	151	dm_warn("unbind() method failed on dev '%s' on error path\n",
	152	dev->name);
	153	}
0118ce79 SG	154	}
0118ce79 SG	155
6494d708	156	fail_bind:
0a5804b5	157	if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
5a87c417 SG	158	if (uclass_unbind_device(dev)) {
	159	dm_warn("Failed to unbind dev '%s' on error path\n",
	160	dev->name);
	161	}
72ebfe86 SG	162	}
72ebfe86 SG	163	fail_uclass_bind:
0a5804b5	164	if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
5a87c417 SG	165	list_del(&dev->sibling_node);
	166	if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
	167	free(dev->parent_platdata);
	168	dev->parent_platdata = NULL;
	169	}
cdc133bd	170	}
5eaed880 PM	171	fail_alloc3:
	172	if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
	173	free(dev->uclass_platdata);
	174	dev->uclass_platdata = NULL;
	175	}
cdc133bd	176	fail_alloc2:
f8a85449 SG	177	if (dev->flags & DM_FLAG_ALLOC_PDATA) {
	178	free(dev->platdata);
	179	dev->platdata = NULL;
	180	}
	181	fail_alloc1:
608f26c5 MY	182	devres_release_all(dev);
608f26c5 MY	183
6494d708	184	free(dev);
72ebfe86	185
6494d708 SG	186	return ret;
	187	}
	188
00606d7e SG	189	int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
00606d7e SG	190	const struct driver_info info, struct udevice *devp)
6494d708 SG	191	{
	192	struct driver *drv;
	193
	194	drv = lists_driver_lookup_name(info->name);
	195	if (!drv)
	196	return -ENOENT;
00606d7e SG	197	if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
00606d7e SG	198	return -EPERM;
6494d708 SG	199
	200	return device_bind(parent, drv, info->name, (void *)info->platdata,
	201	-1, devp);
	202	}
	203
2c03c463 SG	204	static void *alloc_priv(int size, uint flags)
	205	{
	206	void *priv;
	207
	208	if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
	209	priv = memalign(ARCH_DMA_MINALIGN, size);
	210	if (priv)
	211	memset(priv, '\0', size);
	212	} else {
	213	priv = calloc(1, size);
	214	}
	215
	216	return priv;
	217	}
	218
accd4b19	219	int device_probe_child(struct udevice dev, void parent_priv)
6494d708	220	{
3479253d	221	const struct driver *drv;
6494d708 SG	222	int size = 0;
6494d708 SG	223	int ret;
5a66a8ff	224	int seq;
6494d708 SG	225
	226	if (!dev)
	227	return -EINVAL;
	228
	229	if (dev->flags & DM_FLAG_ACTIVATED)
	230	return 0;
	231
	232	drv = dev->driver;
	233	assert(drv);
	234
cdeb2ba9 BM	235	/* Allocate private data if requested and not reentered */
cdeb2ba9 BM	236	if (drv->priv_auto_alloc_size && !dev->priv) {
2c03c463	237	dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
6494d708 SG	238	if (!dev->priv) {
	239	ret = -ENOMEM;
	240	goto fail;
	241	}
	242	}
cdeb2ba9	243	/* Allocate private data if requested and not reentered */
6494d708	244	size = dev->uclass->uc_drv->per_device_auto_alloc_size;
cdeb2ba9	245	if (size && !dev->uclass_priv) {
6494d708 SG	246	dev->uclass_priv = calloc(1, size);
	247	if (!dev->uclass_priv) {
	248	ret = -ENOMEM;
	249	goto fail;
	250	}
	251	}
	252
	253	/* Ensure all parents are probed */
	254	if (dev->parent) {
e59f458d	255	size = dev->parent->driver->per_child_auto_alloc_size;
dac8db2c SG	256	if (!size) {
	257	size = dev->parent->uclass->uc_drv->
	258	per_child_auto_alloc_size;
	259	}
cdeb2ba9	260	if (size && !dev->parent_priv) {
2c03c463	261	dev->parent_priv = alloc_priv(size, drv->flags);
e59f458d SG	262	if (!dev->parent_priv) {
	263	ret = -ENOMEM;
	264	goto fail;
	265	}
accd4b19 SG	266	if (parent_priv)
accd4b19 SG	267	memcpy(dev->parent_priv, parent_priv, size);
e59f458d SG	268	}
e59f458d SG	269
6494d708 SG	270	ret = device_probe(dev->parent);
	271	if (ret)
	272	goto fail;
cdeb2ba9 BM	273
	274	/*
	275	* The device might have already been probed during
	276	* the call to device_probe() on its parent device
	277	* (e.g. PCI bridge devices). Test the flags again
	278	* so that we don't mess up the device.
	279	*/
	280	if (dev->flags & DM_FLAG_ACTIVATED)
	281	return 0;
6494d708 SG	282	}
6494d708 SG	283
5a66a8ff SG	284	seq = uclass_resolve_seq(dev);
	285	if (seq < 0) {
	286	ret = seq;
	287	goto fail;
	288	}
	289	dev->seq = seq;
	290
206d4d2b SG	291	dev->flags \|= DM_FLAG_ACTIVATED;
206d4d2b SG	292
84d26e29 SG	293	/*
	294	* Process pinctrl for everything except the root device, and
	295	* continue regardless of the result of pinctrl.
	296	*/
	297	if (dev->parent)
	298	pinctrl_select_state(dev, "default");
d90a5a30	299
02c07b37	300	ret = uclass_pre_probe_device(dev);
83c7e434 SG	301	if (ret)
	302	goto fail;
	303
a327dee0 SG	304	if (dev->parent && dev->parent->driver->child_pre_probe) {
	305	ret = dev->parent->driver->child_pre_probe(dev);
	306	if (ret)
	307	goto fail;
	308	}
	309
6494d708 SG	310	if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
	311	ret = drv->ofdata_to_platdata(dev);
	312	if (ret)
	313	goto fail;
	314	}
	315
	316	if (drv->probe) {
	317	ret = drv->probe(dev);
02eeb1bb SG	318	if (ret) {
02eeb1bb SG	319	dev->flags &= ~DM_FLAG_ACTIVATED;
6494d708	320	goto fail;
02eeb1bb	321	}
6494d708 SG	322	}
6494d708 SG	323
6494d708	324	ret = uclass_post_probe_device(dev);
206d4d2b	325	if (ret)
6494d708	326	goto fail_uclass;
6494d708 SG	327
	328	return 0;
	329	fail_uclass:
	330	if (device_remove(dev)) {
	331	dm_warn("%s: Device '%s' failed to remove on error path\n",
	332	__func__, dev->name);
	333	}
	334	fail:
206d4d2b SG	335	dev->flags &= ~DM_FLAG_ACTIVATED;
206d4d2b SG	336
5a66a8ff	337	dev->seq = -1;
6494d708 SG	338	device_free(dev);
	339
	340	return ret;
	341	}
	342
accd4b19 SG	343	int device_probe(struct udevice *dev)
	344	{
	345	return device_probe_child(dev, NULL);
	346	}
	347
54c5d08a	348	void dev_get_platdata(struct udevice dev)
6494d708 SG	349	{
6494d708 SG	350	if (!dev) {
964d153c	351	dm_warn("%s: null device\n", __func__);
6494d708 SG	352	return NULL;
	353	}
	354
	355	return dev->platdata;
	356	}
	357
cdc133bd SG	358	void dev_get_parent_platdata(struct udevice dev)
	359	{
	360	if (!dev) {
36d7cc17	361	dm_warn("%s: null device\n", __func__);
cdc133bd SG	362	return NULL;
	363	}
	364
	365	return dev->parent_platdata;
	366	}
	367
5eaed880 PM	368	void dev_get_uclass_platdata(struct udevice dev)
	369	{
	370	if (!dev) {
36d7cc17	371	dm_warn("%s: null device\n", __func__);
5eaed880 PM	372	return NULL;
	373	}
	374
	375	return dev->uclass_platdata;
	376	}
	377
54c5d08a	378	void dev_get_priv(struct udevice dev)
6494d708 SG	379	{
6494d708 SG	380	if (!dev) {
964d153c	381	dm_warn("%s: null device\n", __func__);
6494d708 SG	382	return NULL;
	383	}
	384
	385	return dev->priv;
	386	}
997c87bb	387
e564f054 SG	388	void dev_get_uclass_priv(struct udevice dev)
	389	{
	390	if (!dev) {
	391	dm_warn("%s: null device\n", __func__);
	392	return NULL;
	393	}
	394
	395	return dev->uclass_priv;
	396	}
	397
bcbe3d15	398	void dev_get_parent_priv(struct udevice dev)
e59f458d SG	399	{
e59f458d SG	400	if (!dev) {
964d153c	401	dm_warn("%s: null device\n", __func__);
e59f458d SG	402	return NULL;
	403	}
	404
	405	return dev->parent_priv;
	406	}
	407
997c87bb SG	408	static int device_get_device_tail(struct udevice *dev, int ret,
	409	struct udevice **devp)
	410	{
	411	if (ret)
	412	return ret;
	413
	414	ret = device_probe(dev);
	415	if (ret)
	416	return ret;
	417
	418	*devp = dev;
	419
	420	return 0;
	421	}
	422
	423	int device_get_child(struct udevice parent, int index, struct udevice *devp)
	424	{
	425	struct udevice *dev;
	426
	427	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	428	if (!index--)
	429	return device_get_device_tail(dev, 0, devp);
	430	}
	431
	432	return -ENODEV;
	433	}
	434
	435	int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
	436	bool find_req_seq, struct udevice **devp)
	437	{
	438	struct udevice *dev;
	439
	440	*devp = NULL;
	441	if (seq_or_req_seq == -1)
	442	return -ENODEV;
	443
	444	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	445	if ((find_req_seq ? dev->req_seq : dev->seq) ==
	446	seq_or_req_seq) {
	447	*devp = dev;
	448	return 0;
	449	}
	450	}
	451
	452	return -ENODEV;
	453	}
	454
	455	int device_get_child_by_seq(struct udevice *parent, int seq,
	456	struct udevice **devp)
	457	{
	458	struct udevice *dev;
	459	int ret;
	460
	461	*devp = NULL;
	462	ret = device_find_child_by_seq(parent, seq, false, &dev);
	463	if (ret == -ENODEV) {
	464	/*
	465	* We didn't find it in probed devices. See if there is one
	466	* that will request this seq if probed.
	467	*/
	468	ret = device_find_child_by_seq(parent, seq, true, &dev);
	469	}
	470	return device_get_device_tail(dev, ret, devp);
	471	}
472
473	int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
474	struct udevice **devp)
475	{
476	struct udevice *dev;
477
478	*devp = NULL;
479
480	list_for_each_entry(dev, &parent->child_head, sibling_node) {
481	if (dev->of_offset == of_offset) {
482	*devp = dev;
483	return 0;
484	}
485	}
486
487	return -ENODEV;
488	}
489
132f9bfc	490	int device_get_child_by_of_offset(struct udevice *parent, int node,
997c87bb SG	491	struct udevice **devp)
	492	{
	493	struct udevice *dev;
	494	int ret;
	495
	496	*devp = NULL;
132f9bfc	497	ret = device_find_child_by_of_offset(parent, node, &dev);
997c87bb SG	498	return device_get_device_tail(dev, ret, devp);
997c87bb SG	499	}
a8981d4f	500
2693047a SG	501	static struct udevice _device_find_global_by_of_offset(struct udevice parent,
	502	int of_offset)
	503	{
	504	struct udevice dev, found;
	505
	506	if (parent->of_offset == of_offset)
	507	return parent;
	508
	509	list_for_each_entry(dev, &parent->child_head, sibling_node) {
	510	found = _device_find_global_by_of_offset(dev, of_offset);
	511	if (found)
	512	return found;
	513	}
	514
	515	return NULL;
	516	}
	517
	518	int device_get_global_by_of_offset(int of_offset, struct udevice **devp)
	519	{
	520	struct udevice *dev;
	521
	522	dev = _device_find_global_by_of_offset(gd->dm_root, of_offset);
	523	return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
	524	}
	525
a8981d4f SG	526	int device_find_first_child(struct udevice parent, struct udevice *devp)
	527	{
	528	if (list_empty(&parent->child_head)) {
	529	*devp = NULL;
	530	} else {
	531	*devp = list_first_entry(&parent->child_head, struct udevice,
	532	sibling_node);
	533	}
	534
	535	return 0;
	536	}
	537
	538	int device_find_next_child(struct udevice **devp)
	539	{
	540	struct udevice dev = devp;
	541	struct udevice *parent = dev->parent;
	542
	543	if (list_is_last(&dev->sibling_node, &parent->child_head)) {
	544	*devp = NULL;
	545	} else {
	546	*devp = list_entry(dev->sibling_node.next, struct udevice,
	547	sibling_node);
	548	}
	549
	550	return 0;
	551	}
2ef249b4	552
479728cb SG	553	struct udevice dev_get_parent(struct udevice child)
	554	{
	555	return child->parent;
	556	}
	557
39de8433	558	ulong dev_get_driver_data(struct udevice *dev)
2ef249b4	559	{
39de8433	560	return dev->driver_data;
2ef249b4	561	}
b3670531	562
cc73d37b PM	563	const void dev_get_driver_ops(struct udevice dev)
	564	{
	565	if (!dev \|\| !dev->driver->ops)
	566	return NULL;
	567
	568	return dev->driver->ops;
	569	}
	570
b3670531 SG	571	enum uclass_id device_get_uclass_id(struct udevice *dev)
	572	{
	573	return dev->uclass->uc_drv->id;
	574	}
c9cac3f8	575
f9c370dc PM	576	const char dev_get_uclass_name(struct udevice dev)
	577	{
	578	if (!dev)
	579	return NULL;
	580
	581	return dev->uclass->uc_drv->name;
	582	}
	583
c9cac3f8 PF	584	fdt_addr_t dev_get_addr(struct udevice *dev)
c9cac3f8 PF	585	{
0f925822	586	#if CONFIG_IS_ENABLED(OF_CONTROL)
f3301771 SG	587	fdt_addr_t addr;
f3301771 SG	588
ef5cd330 SR	589	if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
	590	const fdt32_t *reg;
	591
	592	reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", NULL);
	593	if (!reg)
	594	return FDT_ADDR_T_NONE;
	595
	596	/*
	597	* Use the full-fledged translate function for complex
	598	* bus setups.
	599	*/
	600	return fdt_translate_address((void *)gd->fdt_blob,
	601	dev->of_offset, reg);
	602	}
	603
	604	/*
	605	* Use the "simple" translate function for less complex
	606	* bus setups.
	607	*/
02464e38 SW	608	addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
	609	dev->parent->of_offset,
	610	dev->of_offset, "reg",
	611	0, NULL);
628d792c	612	if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
f3301771 SG	613	if (device_get_uclass_id(dev->parent) == UCLASS_SIMPLE_BUS)
	614	addr = simple_bus_translate(dev->parent, addr);
	615	}
	616
	617	return addr;
c9cac3f8	618	#else
c9cac3f8	619	return FDT_ADDR_T_NONE;
c9cac3f8	620	#endif
f3301771	621	}
c5785673 SG	622
	623	bool device_has_children(struct udevice *dev)
	624	{
	625	return !list_empty(&dev->child_head);
	626	}
	627
	628	bool device_has_active_children(struct udevice *dev)
	629	{
	630	struct udevice *child;
	631
	632	for (device_find_first_child(dev, &child);
	633	child;
	634	device_find_next_child(&child)) {
	635	if (device_active(child))
	636	return true;
	637	}
	638
	639	return false;
	640	}
	641
	642	bool device_is_last_sibling(struct udevice *dev)
	643	{
	644	struct udevice *parent = dev->parent;
	645
	646	if (!parent)
	647	return false;
	648	return list_is_last(&dev->sibling_node, &parent->child_head);
	649	}
f5c67ea0 SG	650
	651	int device_set_name(struct udevice dev, const char name)
	652	{
	653	name = strdup(name);
	654	if (!name)
	655	return -ENOMEM;
	656	dev->name = name;
	657
	658	return 0;
	659	}