2 * bt856 - BT856A 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 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
14 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
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/ioctl.h>
34 #include <asm/uaccess.h>
35 #include <linux/i2c.h>
36 #include <linux/i2c-id.h>
37 #include <linux/videodev2.h>
38 #include <media/v4l2-device.h>
39 #include <media/v4l2-chip-ident.h>
40 #include <media/v4l2-i2c-drv.h>
42 MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
43 MODULE_AUTHOR("Mike Bernson & Dave Perks");
44 MODULE_LICENSE("GPL");
47 module_param(debug, int, 0);
48 MODULE_PARM_DESC(debug, "Debug level (0-1)");
51 /* ----------------------------------------------------------------------- */
53 #define BT856_REG_OFFSET 0xDA
54 #define BT856_NR_REG 6
57 struct v4l2_subdev sd;
58 unsigned char reg[BT856_NR_REG];
63 static inline struct bt856 *to_bt856(struct v4l2_subdev *sd)
65 return container_of(sd, struct bt856, sd);
68 /* ----------------------------------------------------------------------- */
70 static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
72 struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
74 encoder->reg[reg - BT856_REG_OFFSET] = value;
75 return i2c_smbus_write_byte_data(client, reg, value);
78 static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
80 return bt856_write(encoder, reg,
81 (encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) |
82 (value ? (1 << bit) : 0));
85 static void bt856_dump(struct bt856 *encoder)
89 v4l2_info(&encoder->sd, "register dump:\n");
90 for (i = 0; i < BT856_NR_REG; i += 2)
91 printk(KERN_CONT " %02x", encoder->reg[i]);
92 printk(KERN_CONT "\n");
95 /* ----------------------------------------------------------------------- */
97 static int bt856_init(struct v4l2_subdev *sd, u32 arg)
99 struct bt856 *encoder = to_bt856(sd);
101 /* This is just for testing!!! */
102 v4l2_dbg(1, debug, sd, "init\n");
103 bt856_write(encoder, 0xdc, 0x18);
104 bt856_write(encoder, 0xda, 0);
105 bt856_write(encoder, 0xde, 0);
107 bt856_setbit(encoder, 0xdc, 3, 1);
108 /*bt856_setbit(encoder, 0xdc, 6, 0);*/
109 bt856_setbit(encoder, 0xdc, 4, 1);
111 if (encoder->norm & V4L2_STD_NTSC)
112 bt856_setbit(encoder, 0xdc, 2, 0);
114 bt856_setbit(encoder, 0xdc, 2, 1);
116 bt856_setbit(encoder, 0xdc, 1, 1);
117 bt856_setbit(encoder, 0xde, 4, 0);
118 bt856_setbit(encoder, 0xde, 3, 1);
124 static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
126 struct bt856 *encoder = to_bt856(sd);
128 v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
130 if (std & V4L2_STD_NTSC) {
131 bt856_setbit(encoder, 0xdc, 2, 0);
132 } else if (std & V4L2_STD_PAL) {
133 bt856_setbit(encoder, 0xdc, 2, 1);
134 bt856_setbit(encoder, 0xda, 0, 0);
135 /*bt856_setbit(encoder, 0xda, 0, 1);*/
145 static int bt856_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
147 struct bt856 *encoder = to_bt856(sd);
149 v4l2_dbg(1, debug, sd, "set input %d\n", route->input);
151 /* We only have video bus.
152 * route->input= 0: input is from bt819
153 * route->input= 1: input is from ZR36060 */
154 switch (route->input) {
156 bt856_setbit(encoder, 0xde, 4, 0);
157 bt856_setbit(encoder, 0xde, 3, 1);
158 bt856_setbit(encoder, 0xdc, 3, 1);
159 bt856_setbit(encoder, 0xdc, 6, 0);
162 bt856_setbit(encoder, 0xde, 4, 0);
163 bt856_setbit(encoder, 0xde, 3, 1);
164 bt856_setbit(encoder, 0xdc, 3, 1);
165 bt856_setbit(encoder, 0xdc, 6, 1);
167 case 2: /* Color bar */
168 bt856_setbit(encoder, 0xdc, 3, 0);
169 bt856_setbit(encoder, 0xde, 4, 1);
180 static int bt856_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
182 struct i2c_client *client = v4l2_get_subdevdata(sd);
184 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT856, 0);
187 /* ----------------------------------------------------------------------- */
189 static const struct v4l2_subdev_core_ops bt856_core_ops = {
190 .g_chip_ident = bt856_g_chip_ident,
194 static const struct v4l2_subdev_video_ops bt856_video_ops = {
195 .s_std_output = bt856_s_std_output,
196 .s_routing = bt856_s_routing,
199 static const struct v4l2_subdev_ops bt856_ops = {
200 .core = &bt856_core_ops,
201 .video = &bt856_video_ops,
204 /* ----------------------------------------------------------------------- */
206 static int bt856_probe(struct i2c_client *client,
207 const struct i2c_device_id *id)
209 struct bt856 *encoder;
210 struct v4l2_subdev *sd;
212 /* Check if the adapter supports the needed features */
213 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
216 v4l_info(client, "chip found @ 0x%x (%s)\n",
217 client->addr << 1, client->adapter->name);
219 encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
223 v4l2_i2c_subdev_init(sd, client, &bt856_ops);
224 encoder->norm = V4L2_STD_NTSC;
226 bt856_write(encoder, 0xdc, 0x18);
227 bt856_write(encoder, 0xda, 0);
228 bt856_write(encoder, 0xde, 0);
230 bt856_setbit(encoder, 0xdc, 3, 1);
231 /*bt856_setbit(encoder, 0xdc, 6, 0);*/
232 bt856_setbit(encoder, 0xdc, 4, 1);
234 if (encoder->norm & V4L2_STD_NTSC)
235 bt856_setbit(encoder, 0xdc, 2, 0);
237 bt856_setbit(encoder, 0xdc, 2, 1);
239 bt856_setbit(encoder, 0xdc, 1, 1);
240 bt856_setbit(encoder, 0xde, 4, 0);
241 bt856_setbit(encoder, 0xde, 3, 1);
248 static int bt856_remove(struct i2c_client *client)
250 struct v4l2_subdev *sd = i2c_get_clientdata(client);
252 v4l2_device_unregister_subdev(sd);
257 static const struct i2c_device_id bt856_id[] = {
261 MODULE_DEVICE_TABLE(i2c, bt856_id);
263 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
265 .probe = bt856_probe,
266 .remove = bt856_remove,
267 .id_table = bt856_id,