2 bt866 - BT866 Digital Video Encoder (Rockwell Part)
4 Copyright (C) 1999 Mike Bernson <mike@mlb.org>
5 Copyright (C) 1998 Dave Perks <dperks@ibm.net>
7 Modifications for LML33/DC10plus unified driver
8 Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
10 This code was modify/ported from the saa7111 driver written
13 This code was adapted for the bt866 by Christer Weinigel and ported
14 to 2.6 by Martin Samuelsson.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 2 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program; if not, write to the Free Software
28 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/slab.h>
34 #include <linux/ioctl.h>
35 #include <asm/uaccess.h>
36 #include <linux/i2c.h>
37 #include <linux/videodev2.h>
38 #include <media/v4l2-device.h>
39 #include <media/v4l2-chip-ident.h>
41 MODULE_DESCRIPTION("Brooktree-866 video encoder driver");
42 MODULE_AUTHOR("Mike Bernson & Dave Perks");
43 MODULE_LICENSE("GPL");
46 module_param(debug, int, 0);
47 MODULE_PARM_DESC(debug, "Debug level (0-1)");
50 /* ----------------------------------------------------------------------- */
53 struct v4l2_subdev sd;
57 static inline struct bt866 *to_bt866(struct v4l2_subdev *sd)
59 return container_of(sd, struct bt866, sd);
62 static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)
64 struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
71 encoder->reg[subaddr] = data;
73 v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);
75 for (err = 0; err < 3;) {
76 if (i2c_master_send(client, buffer, 2) == 2)
79 v4l_warn(client, "error #%d writing to 0x%02x\n",
81 schedule_timeout_interruptible(msecs_to_jiffies(100));
84 v4l_warn(client, "giving up\n");
91 static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
93 v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
95 /* Only PAL supported by this driver at the moment! */
96 if (!(std & V4L2_STD_NTSC))
101 static int bt866_s_routing(struct v4l2_subdev *sd,
102 u32 input, u32 output, u32 config)
104 static const __u8 init[] = {
105 0xc8, 0xcc, /* CRSCALE */
106 0xca, 0x91, /* CBSCALE */
107 0xcc, 0x24, /* YC16 | OSDNUM */
109 0xdc, 0x24, /* SETMODE | PAL */
110 0xde, 0x02, /* EACTIVE */
113 0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
114 0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
115 0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
116 0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
117 0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
118 0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
119 0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
120 0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */
122 0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
123 0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
124 0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
125 0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
126 0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
127 0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
128 0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
129 0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
131 struct bt866 *encoder = to_bt866(sd);
135 for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
136 bt866_write(encoder, init[i], init[i+1]);
138 val = encoder->reg[0xdc];
141 val |= 0x40; /* CBSWAP */
143 val &= ~0x40; /* !CBSWAP */
145 bt866_write(encoder, 0xdc, val);
147 val = encoder->reg[0xcc];
149 val |= 0x01; /* OSDBAR */
151 val &= ~0x01; /* !OSDBAR */
152 bt866_write(encoder, 0xcc, val);
154 v4l2_dbg(1, debug, sd, "set input %d\n", input);
168 /* Code to setup square pixels, might be of some use in the future,
169 but is currently unused. */
170 val = encoder->reg[0xdc];
172 val |= 1; /* SQUARE */
174 val &= ~1; /* !SQUARE */
175 bt866_write(client, 0xdc, val);
178 static int bt866_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
180 struct i2c_client *client = v4l2_get_subdevdata(sd);
182 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT866, 0);
185 /* ----------------------------------------------------------------------- */
187 static const struct v4l2_subdev_core_ops bt866_core_ops = {
188 .g_chip_ident = bt866_g_chip_ident,
191 static const struct v4l2_subdev_video_ops bt866_video_ops = {
192 .s_std_output = bt866_s_std_output,
193 .s_routing = bt866_s_routing,
196 static const struct v4l2_subdev_ops bt866_ops = {
197 .core = &bt866_core_ops,
198 .video = &bt866_video_ops,
201 static int bt866_probe(struct i2c_client *client,
202 const struct i2c_device_id *id)
204 struct bt866 *encoder;
205 struct v4l2_subdev *sd;
207 v4l_info(client, "chip found @ 0x%x (%s)\n",
208 client->addr << 1, client->adapter->name);
210 encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
214 v4l2_i2c_subdev_init(sd, client, &bt866_ops);
218 static int bt866_remove(struct i2c_client *client)
220 struct v4l2_subdev *sd = i2c_get_clientdata(client);
222 v4l2_device_unregister_subdev(sd);
227 static const struct i2c_device_id bt866_id[] = {
231 MODULE_DEVICE_TABLE(i2c, bt866_id);
233 static struct i2c_driver bt866_driver = {
235 .owner = THIS_MODULE,
238 .probe = bt866_probe,
239 .remove = bt866_remove,
240 .id_table = bt866_id,
243 module_i2c_driver(bt866_driver);