1 /*
2 * xen/arch/arm/device.c
3 *
4 * Helpers to use a device retrieved via the device tree.
5 *
6 * Julien Grall <julien.grall@linaro.org>
7 * Copyright (C) 2013 Linaro Limited.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19
20 #include <asm/device.h>
21 #include <xen/errno.h>
22 #include <xen/init.h>
23 #include <xen/lib.h>
24
25 extern const struct device_desc _sdevice[], _edevice[];
26 extern const struct acpi_device_desc _asdevice[], _aedevice[];
27
device_init(struct dt_device_node * dev,enum device_class class,const void * data)28 int __init device_init(struct dt_device_node *dev, enum device_class class,
29 const void *data)
30 {
31 const struct device_desc *desc;
32
33 ASSERT(dev != NULL);
34
35 if ( !dt_device_is_available(dev) || dt_device_for_passthrough(dev) )
36 return -ENODEV;
37
38 for ( desc = _sdevice; desc != _edevice; desc++ )
39 {
40 if ( desc->class != class )
41 continue;
42
43 if ( dt_match_node(desc->dt_match, dev) )
44 {
45 ASSERT(desc->init != NULL);
46
47 return desc->init(dev, data);
48 }
49
50 }
51
52 return -EBADF;
53 }
54
acpi_device_init(enum device_class class,const void * data,int class_type)55 int __init acpi_device_init(enum device_class class, const void *data, int class_type)
56 {
57 const struct acpi_device_desc *desc;
58
59 for ( desc = _asdevice; desc != _aedevice; desc++ )
60 {
61 if ( ( desc->class != class ) || ( desc->class_type != class_type ) )
62 continue;
63
64 ASSERT(desc->init != NULL);
65
66 return desc->init(data);
67 }
68
69 return -EBADF;
70 }
71
device_get_class(const struct dt_device_node * dev)72 enum device_class device_get_class(const struct dt_device_node *dev)
73 {
74 const struct device_desc *desc;
75
76 ASSERT(dev != NULL);
77
78 for ( desc = _sdevice; desc != _edevice; desc++ )
79 {
80 if ( dt_match_node(desc->dt_match, dev) )
81 return desc->class;
82 }
83
84 return DEVICE_UNKNOWN;
85 }
86
87 /*
88 * Local variables:
89 * mode: C
90 * c-file-style: "BSD"
91 * c-basic-offset: 4
92 * indent-tabs-mode: nil
93 * End:
94 */
95