summaryrefslogtreecommitdiff
path: root/drivers/core/lists.c
blob: 3a1ea8565449699a39ba5684dbecfbf71e30780b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*
 * Copyright (c) 2013 Google, Inc
 *
 * (C) Copyright 2012
 * Marek Vasut <marex@denx.de>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <errno.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/platdata.h>
#include <dm/uclass.h>
#include <dm/util.h>
#include <fdtdec.h>
#include <linux/compiler.h>

struct driver *lists_driver_lookup_name(const char *name)
{
	struct driver *drv =
		ll_entry_start(struct driver, driver);
	const int n_ents = ll_entry_count(struct driver, driver);
	struct driver *entry;

	if (!drv || !n_ents)
		return NULL;

	for (entry = drv; entry != drv + n_ents; entry++) {
		if (!strcmp(name, entry->name))
			return entry;
	}

	/* Not found */
	return NULL;
}

struct uclass_driver *lists_uclass_lookup(enum uclass_id id)
{
	struct uclass_driver *uclass =
		ll_entry_start(struct uclass_driver, uclass);
	const int n_ents = ll_entry_count(struct uclass_driver, uclass);
	struct uclass_driver *entry;

	if ((id == UCLASS_INVALID) || !uclass)
		return NULL;

	for (entry = uclass; entry != uclass + n_ents; entry++) {
		if (entry->id == id)
			return entry;
	}

	return NULL;
}

int lists_bind_drivers(struct udevice *parent, bool pre_reloc_only)
{
	struct driver_info *info =
		ll_entry_start(struct driver_info, driver_info);
	const int n_ents = ll_entry_count(struct driver_info, driver_info);
	struct driver_info *entry;
	struct udevice *dev;
	int result = 0;
	int ret;

	for (entry = info; entry != info + n_ents; entry++) {
		ret = device_bind_by_name(parent, pre_reloc_only, entry, &dev);
		if (ret && ret != -EPERM) {
			dm_warn("No match for driver '%s'\n", entry->name);
			if (!result || ret != -ENOENT)
				result = ret;
		}
	}

	return result;
}

#ifdef CONFIG_OF_CONTROL
/**
 * driver_check_compatible() - Check if a driver is compatible with this node
 *
 * @param blob:		Device tree pointer
 * @param offset:	Offset of node in device tree
 * @param of_matchL	List of compatible strings to match
 * @return 0 if there is a match, -ENOENT if no match, -ENODEV if the node
 * does not have a compatible string, other error <0 if there is a device
 * tree error
 */
static int driver_check_compatible(const void *blob, int offset,
				   const struct udevice_id *of_match)
{
	int ret;

	if (!of_match)
		return -ENOENT;

	while (of_match->compatible) {
		ret = fdt_node_check_compatible(blob, offset,
						of_match->compatible);
		if (!ret)
			return 0;
		else if (ret == -FDT_ERR_NOTFOUND)
			return -ENODEV;
		else if (ret < 0)
			return -EINVAL;
		of_match++;
	}

	return -ENOENT;
}

int lists_bind_fdt(struct udevice *parent, const void *blob, int offset,
		   struct udevice **devp)
{
	struct driver *driver = ll_entry_start(struct driver, driver);
	const int n_ents = ll_entry_count(struct driver, driver);
	struct driver *entry;
	struct udevice *dev;
	bool found = false;
	const char *name;
	int result = 0;
	int ret = 0;

	dm_dbg("bind node %s\n", fdt_get_name(blob, offset, NULL));
	if (devp)
		*devp = NULL;
	for (entry = driver; entry != driver + n_ents; entry++) {
		ret = driver_check_compatible(blob, offset, entry->of_match);
		name = fdt_get_name(blob, offset, NULL);
		if (ret == -ENOENT) {
			continue;
		} else if (ret == -ENODEV) {
			dm_dbg("Device '%s' has no compatible string\n", name);
			break;
		} else if (ret) {
			dm_warn("Device tree error at offset %d\n", offset);
			if (!result || ret != -ENOENT)
				result = ret;
			break;
		}

		dm_dbg("   - found match at '%s'\n", entry->name);
		ret = device_bind(parent, entry, name, NULL, offset, &dev);
		if (ret) {
			dm_warn("Error binding driver '%s'\n", entry->name);
			return ret;
		} else {
			found = true;
			if (devp)
				*devp = dev;
		}
		break;
	}

	if (!found && !result && ret != -ENODEV) {
		dm_dbg("No match for node '%s'\n",
		       fdt_get_name(blob, offset, NULL));
	}

	return result;
}
#endif