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
|
/*
* libraw1394 - library for raw access to the 1394 bus with the Linux subsystem.
*
* Copyright (C) 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
* Christian Toegel <christian.toegel@gmx.at>
*
* This library is licensed under the GNU Lesser General Public License (LGPL),
* version 2.1 or later. See the file COPYING.LIB in the distribution for
* details.
*/
#include <config.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "raw1394.h"
#include "kernel-raw1394.h"
#include "raw1394_private.h"
/*
* AdressRangeMapping REGISTERING:
* start, length .... identifies addressrange
* *initial_value ... pointer to buffer containing (if necessary) initial value
* NULL means undefined
* arm_tag .......... identifier for arm_tag_handler
* (usually pointer to raw1394_arm_reqhandle)
* access_rights .... access-rights for registered addressrange handled
* by kernel-part. Value is one or more binary or of the
* following flags: ARM_READ, ARM_WRITE, ARM_LOCK
* notification_options ... identifies for which type of request you want
* to be notified. Value is one or more binary or of the
* following flags: ARM_READ, ARM_WRITE, ARM_LOCK
* client_transactions ... identifies for which type of request you want
* to handle the request by the client application.
* for those requests no response will be generated, but
* has to be generated by the application.
* Value is one or more binary or of the
* following flags: ARM_READ, ARM_WRITE, ARM_LOCK
* For each bit set here, notification_options and
* access_rights will be ignored.
* returnvalue: 0 ... success
* <0 ... failure
*/
int raw1394_arm_register(struct raw1394_handle *handle, nodeaddr_t start,
size_t length, byte_t *initial_value,
octlet_t arm_tag, arm_options_t access_rights,
arm_options_t notification_options,
arm_options_t client_transactions)
{
int retval=0;
struct raw1394_request *req = &(handle->req);
if (((start & ~(0xFFFFFFFFFFFF)) != 0) ||
(((start + length) & ~(0xFFFFFFFFFFFF)) != 0)) {
errno = EINVAL;
return (-1);
}
CLEAR_REQ(req);
req->type = RAW1394_REQ_ARM_REGISTER;
req->generation = handle->generation; /* not necessary */
req->address = start;
req->length = length;
req->tag = arm_tag;
req->recvb = ptr2int(handle->buffer); /* arm_handle on success */
req->misc = ((client_transactions & 0x0f) << 8)|((notification_options & 0x0F) << 4)|(access_rights & 0x0F)
|((ARM_REC_LENGTH & 0xFFFF) << 16);
req->sendb = ptr2int(initial_value);
retval = (int) write(handle->fd, req, sizeof(*req));
return (retval == sizeof(*req)) ? 0:-1;
}
/*
* AdressRangeMapping UNREGISTERING:
* start ............ identifies addressrange for unregistering
* (value of start have to be the same value
* used for registering this adressrange)
* returnvalue: 0 ... success
* <0 ... failure
*/
int raw1394_arm_unregister (struct raw1394_handle *handle, nodeaddr_t start)
{
int retval;
struct raw1394_request *req = &(handle->req);
CLEAR_REQ(req);
req->type = RAW1394_REQ_ARM_UNREGISTER;
req->generation = handle->generation; /* not necessary */
req->address = start;
retval = write(handle->fd, req, sizeof(*req));
return (retval == sizeof(*req)) ? 0:-1;
}
|
