summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/zc0301/zc0301.h
blob: 710f12eb9126a9c2a0d4638766706368c36b78ac (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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
/***************************************************************************
 * V4L2 driver for ZC0301[P] Image Processor and Control Chip              *
 *                                                                         *
 * Copyright (C) 2006-2007 by Luca Risolia <luca.risolia@studio.unibo.it>  *
 *                                                                         *
 * This program is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU General Public License as published by    *
 * the Free Software Foundation; either version 2 of the License, or       *
 * (at your option) any later version.                                     *
 *                                                                         *
 * This program is distributed in the hope that it will be useful,         *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
 * GNU General Public License for more details.                            *
 *                                                                         *
 * You should have received a copy of the GNU General Public License       *
 * along with this program; if not, write to the Free Software             *
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
 ***************************************************************************/

#ifndef _ZC0301_H_
#define _ZC0301_H_

#include <linux/version.h>
#include <linux/usb.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/types.h>
#include <linux/param.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/stddef.h>
#include <linux/string.h>

#include "zc0301_sensor.h"

/*****************************************************************************/

#define ZC0301_DEBUG
#define ZC0301_DEBUG_LEVEL         2
#define ZC0301_MAX_DEVICES         64
#define ZC0301_FORCE_MUNMAP        0
#define ZC0301_MAX_FRAMES          32
#define ZC0301_COMPRESSION_QUALITY 0
#define ZC0301_URBS                2
#define ZC0301_ISO_PACKETS         7
#define ZC0301_ALTERNATE_SETTING   7
#define ZC0301_URB_TIMEOUT         msecs_to_jiffies(2 * ZC0301_ISO_PACKETS)
#define ZC0301_CTRL_TIMEOUT        100
#define ZC0301_FRAME_TIMEOUT       2

/*****************************************************************************/

ZC0301_ID_TABLE
ZC0301_SENSOR_TABLE

enum zc0301_frame_state {
	F_UNUSED,
	F_QUEUED,
	F_GRABBING,
	F_DONE,
	F_ERROR,
};

struct zc0301_frame_t {
	void* bufmem;
	struct v4l2_buffer buf;
	enum zc0301_frame_state state;
	struct list_head frame;
	unsigned long vma_use_count;
};

enum zc0301_dev_state {
	DEV_INITIALIZED = 0x01,
	DEV_DISCONNECTED = 0x02,
	DEV_MISCONFIGURED = 0x04,
};

enum zc0301_io_method {
	IO_NONE,
	IO_READ,
	IO_MMAP,
};

enum zc0301_stream_state {
	STREAM_OFF,
	STREAM_INTERRUPT,
	STREAM_ON,
};

struct zc0301_module_param {
	u8 force_munmap;
	u16 frame_timeout;
};

static DECLARE_RWSEM(zc0301_disconnect);

struct zc0301_device {
	struct video_device* v4ldev;

	struct zc0301_sensor sensor;

	struct usb_device* usbdev;
	struct urb* urb[ZC0301_URBS];
	void* transfer_buffer[ZC0301_URBS];
	u8* control_buffer;

	struct zc0301_frame_t *frame_current, frame[ZC0301_MAX_FRAMES];
	struct list_head inqueue, outqueue;
	u32 frame_count, nbuffers, nreadbuffers;

	enum zc0301_io_method io;
	enum zc0301_stream_state stream;

	struct v4l2_jpegcompression compression;

	struct zc0301_module_param module_param;

	enum zc0301_dev_state state;
	u8 users;

	struct mutex dev_mutex, fileop_mutex;
	spinlock_t queue_lock;
	wait_queue_head_t open, wait_frame, wait_stream;
};

/*****************************************************************************/

struct zc0301_device*
zc0301_match_id(struct zc0301_device* cam, const struct usb_device_id *id)
{
	return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
}

void
zc0301_attach_sensor(struct zc0301_device* cam, struct zc0301_sensor* sensor)
{
	memcpy(&cam->sensor, sensor, sizeof(struct zc0301_sensor));
}

/*****************************************************************************/

#undef DBG
#undef KDBG
#ifdef ZC0301_DEBUG
#	define DBG(level, fmt, args...)                                       \
do {                                                                          \
	if (debug >= (level)) {                                               \
		if ((level) == 1)                                             \
			dev_err(&cam->usbdev->dev, fmt "\n", ## args);        \
		else if ((level) == 2)                                        \
			dev_info(&cam->usbdev->dev, fmt "\n", ## args);       \
		else if ((level) >= 3)                                        \
			dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",      \
				 __FUNCTION__, __LINE__ , ## args);           \
	}                                                                     \
} while (0)
#	define KDBG(level, fmt, args...)                                      \
do {                                                                          \
	if (debug >= (level)) {                                               \
		if ((level) == 1 || (level) == 2)                             \
			pr_info("zc0301: " fmt "\n", ## args);                \
		else if ((level) == 3)                                        \
			pr_debug("zc0301: [%s:%d] " fmt "\n", __FUNCTION__,   \
				 __LINE__ , ## args);                         \
	}                                                                     \
} while (0)
#	define V4LDBG(level, name, cmd)                                       \
do {                                                                          \
	if (debug >= (level))                                                 \
		v4l_print_ioctl(name, cmd);                                   \
} while (0)
#else
#	define DBG(level, fmt, args...) do {;} while(0)
#	define KDBG(level, fmt, args...) do {;} while(0)
#	define V4LDBG(level, name, cmd) do {;} while(0)
#endif

#undef PDBG
#define PDBG(fmt, args...)                                                    \
dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n",                              \
	 __FUNCTION__, __LINE__ , ## args)

#undef PDBGG
#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */

#endif /* _ZC0301_H_ */