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
|
/* $NetBSD: acpi_i2c.c,v 1.12 2022/07/23 03:08:17 thorpej Exp $ */
/*-
* Copyright (c) 2017, 2021 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Manuel Bouyer.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_i2c.c,v 1.12 2022/07/23 03:08:17 thorpej Exp $");
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_i2c.h>
#include <dev/i2c/i2cvar.h>
#include <sys/kmem.h>
#define _COMPONENT ACPI_BUS_COMPONENT
ACPI_MODULE_NAME ("acpi_i2c")
struct acpi_i2c_context {
uint16_t i2c_addr;
};
static ACPI_STATUS
acpi_i2c_resource_parse_callback(ACPI_RESOURCE *res, void *context)
{
struct acpi_i2c_context *i2cc = context;
switch (res->Type) {
case ACPI_RESOURCE_TYPE_END_TAG:
break;
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
switch (res->Data.I2cSerialBus.Type) {
case ACPI_RESOURCE_SERIAL_TYPE_I2C:
i2cc->i2c_addr = res->Data.I2cSerialBus.SlaveAddress;
break;
}
break;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
break;
default:
printf("resource type 0x%x ignored\n", res->Type);
}
return_ACPI_STATUS(AE_OK);
}
static void
acpi_enter_i2c_device(struct acpi_devnode *ad, prop_array_t array)
{
prop_dictionary_t dev;
struct acpi_i2c_context i2cc;
ACPI_STATUS rv;
char *clist;
size_t clist_size;
memset(&i2cc, 0, sizeof(i2cc));
rv = AcpiWalkResources(ad->ad_handle, "_CRS",
acpi_i2c_resource_parse_callback, &i2cc);
if (ACPI_FAILURE(rv)) {
aprint_error("ACPI: unable to get resources "
"for %s: %s\n", ad->ad_name,
AcpiFormatException(rv));
return;
}
if (i2cc.i2c_addr == 0)
return;
dev = prop_dictionary_create();
if (dev == NULL) {
aprint_error("ignoring device %s (no memory)\n",
ad->ad_name);
return;
}
clist = acpi_pack_compat_list(ad, &clist_size);
if (clist == NULL) {
prop_object_release(dev);
aprint_error("ignoring device %s (no _HID or _CID)\n",
ad->ad_name);
return;
}
prop_dictionary_set_string(dev, "name", ad->ad_name);
prop_dictionary_set_uint32(dev, "addr", i2cc.i2c_addr);
prop_dictionary_set_uint64(dev, "cookie", (uintptr_t)ad->ad_handle);
prop_dictionary_set_uint32(dev, "cookietype", I2C_COOKIE_ACPI);
prop_dictionary_set_data(dev, "compatible", clist, clist_size);
kmem_free(clist, clist_size);
prop_array_add(array, dev);
prop_object_release(dev);
}
prop_array_t
acpi_enter_i2c_devs(device_t dev, struct acpi_devnode *devnode)
{
struct acpi_devnode *ad;
prop_array_t array = prop_array_create();
if (array == NULL)
return NULL;
SIMPLEQ_FOREACH(ad, &devnode->ad_child_head, ad_child_list) {
if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE)
continue;
if (!acpi_device_present(ad->ad_handle))
continue;
acpi_enter_i2c_device(ad, array);
}
if (dev != NULL) {
acpi_claim_childdevs(dev, devnode);
}
return array;
}
|