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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
bt866 - BT866 Digital Video Encoder (Rockwell Part)
Copyright (C) 1999 Mike Bernson <mike@mlb.org>
Copyright (C) 1998 Dave Perks <dperks@ibm.net>
Modifications for LML33/DC10plus unified driver
Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
This code was modify/ported from the saa7111 driver written
by Dave Perks.
This code was adapted for the bt866 by Christer Weinigel and ported
to 2.6 by Martin Samuelsson.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
MODULE_DESCRIPTION("Brooktree-866 video encoder driver");
MODULE_AUTHOR("Mike Bernson & Dave Perks");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
/* ----------------------------------------------------------------------- */
struct bt866 {
struct v4l2_subdev sd;
u8 reg[256];
};
static inline struct bt866 *to_bt866(struct v4l2_subdev *sd)
{
return container_of(sd, struct bt866, sd);
}
static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)
{
struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
u8 buffer[2];
int err;
buffer[0] = subaddr;
buffer[1] = data;
encoder->reg[subaddr] = data;
v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);
for (err = 0; err < 3;) {
if (i2c_master_send(client, buffer, 2) == 2)
break;
err++;
v4l_warn(client, "error #%d writing to 0x%02x\n",
err, subaddr);
schedule_timeout_interruptible(msecs_to_jiffies(100));
}
if (err == 3) {
v4l_warn(client, "giving up\n");
return -1;
}
return 0;
}
static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
/* Only PAL supported by this driver at the moment! */
if (!(std & V4L2_STD_NTSC))
return -EINVAL;
return 0;
}
static int bt866_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
static const __u8 init[] = {
0xc8, 0xcc, /* CRSCALE */
0xca, 0x91, /* CBSCALE */
0xcc, 0x24, /* YC16 | OSDNUM */
0xda, 0x00, /* */
0xdc, 0x24, /* SETMODE | PAL */
0xde, 0x02, /* EACTIVE */
/* overlay colors */
0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */
0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
};
struct bt866 *encoder = to_bt866(sd);
u8 val;
int i;
for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
bt866_write(encoder, init[i], init[i+1]);
val = encoder->reg[0xdc];
if (input == 0)
val |= 0x40; /* CBSWAP */
else
val &= ~0x40; /* !CBSWAP */
bt866_write(encoder, 0xdc, val);
val = encoder->reg[0xcc];
if (input == 2)
val |= 0x01; /* OSDBAR */
else
val &= ~0x01; /* !OSDBAR */
bt866_write(encoder, 0xcc, val);
v4l2_dbg(1, debug, sd, "set input %d\n", input);
switch (input) {
case 0:
case 1:
case 2:
break;
default:
return -EINVAL;
}
return 0;
}
#if 0
/* Code to setup square pixels, might be of some use in the future,
but is currently unused. */
val = encoder->reg[0xdc];
if (*iarg)
val |= 1; /* SQUARE */
else
val &= ~1; /* !SQUARE */
bt866_write(client, 0xdc, val);
#endif
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_video_ops bt866_video_ops = {
.s_std_output = bt866_s_std_output,
.s_routing = bt866_s_routing,
};
static const struct v4l2_subdev_ops bt866_ops = {
.video = &bt866_video_ops,
};
static int bt866_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct bt866 *encoder;
struct v4l2_subdev *sd;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
if (encoder == NULL)
return -ENOMEM;
sd = &encoder->sd;
v4l2_i2c_subdev_init(sd, client, &bt866_ops);
return 0;
}
static int bt866_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
return 0;
}
static const struct i2c_device_id bt866_id[] = {
{ "bt866", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, bt866_id);
static struct i2c_driver bt866_driver = {
.driver = {
.name = "bt866",
},
.probe = bt866_probe,
.remove = bt866_remove,
.id_table = bt866_id,
};
module_i2c_driver(bt866_driver);
|
