1/*
2 * Copyright (c) 2009 Fran��ois Revol, <revol@free.fr>.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify,
8 * merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#include <KernelExport.h>
26#include <Drivers.h>
27#include <Errors.h>
28
29int32 			api_version = B_CUR_DRIVER_API_VERSION;
30static int32	sOpenMask;
31
32status_t
33init_hardware(void)
34{
35	dprintf("kdl: init_hardware\n");
36	return B_OK;
37}
38
39
40status_t
41init_driver(void)
42{
43	dprintf("kdl: init_driver\n");
44	return B_OK;
45}
46
47
48void
49uninit_driver(void)
50{
51	dprintf("kdl: uninit_driver\n");
52}
53
54
55static status_t
56driver_open(const char *name, uint32 flags, void** _cookie)
57{
58	dprintf("kdl: open\n");
59
60	// TODO: check for proper credencials! (root only ?)
61
62	if (atomic_or(&sOpenMask, 1)) {
63		dprintf("kdl: open, BUSY!\n");
64		return B_BUSY;
65	}
66
67	dprintf("kdl: open, success\n");
68	return B_OK;
69}
70
71
72static status_t
73driver_close(void* cookie)
74{
75	dprintf("kdl: close enter\n");
76	dprintf("kdl: close leave\n");
77	return B_OK;
78}
79
80
81static status_t
82driver_free(void* cookie)
83{
84	dprintf("kdl: free\n");
85	atomic_and(&sOpenMask, ~1);
86	return B_OK;
87}
88
89
90static status_t
91driver_read(void* cookie, off_t position, void *buf, size_t* num_bytes)
92{
93	dprintf("kdl: read\n");
94	panic("requested from kdl driver.");
95	*num_bytes = 0; // nothing to read
96	return B_ERROR;
97}
98
99
100static status_t
101driver_write(void* cookie, off_t position, const void* buffer, size_t* num_bytes)
102{
103	dprintf("kdl: write\n");
104	*num_bytes = 1;		// pretend 1 byte was written
105	return B_OK;
106}
107
108
109static status_t
110driver_control(void *cookie, uint32 op, void *arg, size_t len)
111{
112	dprintf("kdl: control\n");
113	return B_ERROR;
114}
115
116
117const char**
118publish_devices(void)
119{
120	static const char *names[] = {"misc/kdl", NULL};
121	dprintf("kdl: publish_devices\n");
122	return names;
123}
124
125
126device_hooks*
127find_device(const char* name)
128{
129	static device_hooks hooks = {
130		driver_open,
131		driver_close,
132		driver_free,
133		driver_control,
134		driver_read,
135		driver_write,
136	};
137	dprintf("kdl: find_device\n");
138	return &hooks;
139}
140
141