2 * adv7175 - adv7175a video encoder driver version 0.0.3
4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
5 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
6 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
7 * - some corrections for Pinnacle Systems Inc. DC10plus card.
9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
10 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/ioctl.h>
31 #include <asm/uaccess.h>
32 #include <linux/i2c.h>
33 #include <linux/videodev2.h>
34 #include <media/v4l2-device.h>
35 #include <media/v4l2-chip-ident.h>
37 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
38 MODULE_AUTHOR("Dave Perks");
39 MODULE_LICENSE("GPL");
41 #define I2C_ADV7175 0xd4
42 #define I2C_ADV7176 0x54
46 module_param(debug, int, 0);
47 MODULE_PARM_DESC(debug, "Debug level (0-1)");
49 /* ----------------------------------------------------------------------- */
52 struct v4l2_subdev sd;
57 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
59 return container_of(sd, struct adv7175, sd);
62 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
64 /* ----------------------------------------------------------------------- */
66 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
68 struct i2c_client *client = v4l2_get_subdevdata(sd);
70 return i2c_smbus_write_byte_data(client, reg, value);
73 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
75 struct i2c_client *client = v4l2_get_subdevdata(sd);
77 return i2c_smbus_read_byte_data(client, reg);
80 static int adv7175_write_block(struct v4l2_subdev *sd,
81 const u8 *data, unsigned int len)
83 struct i2c_client *client = v4l2_get_subdevdata(sd);
87 /* the adv7175 has an autoincrement function, use it if
88 * the adapter understands raw I2C */
89 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
90 /* do raw I2C, not smbus compatible */
96 block_data[block_len++] = reg = data[0];
98 block_data[block_len++] = data[1];
102 } while (len >= 2 && data[0] == reg && block_len < 32);
103 ret = i2c_master_send(client, block_data, block_len);
108 /* do some slow I2C emulation kind of thing */
111 ret = adv7175_write(sd, reg, *data++);
121 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
123 /* for some reason pass_through NTSC needs
124 * a different sub-carrier freq to remain stable. */
126 adv7175_write(sd, 0x02, 0x00);
128 adv7175_write(sd, 0x02, 0x55);
130 adv7175_write(sd, 0x03, 0x55);
131 adv7175_write(sd, 0x04, 0x55);
132 adv7175_write(sd, 0x05, 0x25);
135 /* ----------------------------------------------------------------------- */
136 /* Output filter: S-Video Composite */
138 #define MR050 0x11 /* 0x09 */
139 #define MR060 0x14 /* 0x0c */
141 /* ----------------------------------------------------------------------- */
149 static const unsigned char init_common[] = {
151 0x00, MR050, /* MR0, PAL enabled */
152 0x01, 0x00, /* MR1 */
153 0x02, 0x0c, /* subc. freq. */
154 0x03, 0x8c, /* subc. freq. */
155 0x04, 0x79, /* subc. freq. */
156 0x05, 0x26, /* subc. freq. */
157 0x06, 0x40, /* subc. phase */
159 0x07, TR0MODE, /* TR0, 16bit */
164 0x0c, TR1CAPT, /* TR1 */
165 0x0d, 0x4f, /* MR2 */
172 static const unsigned char init_pal[] = {
173 0x00, MR050, /* MR0, PAL enabled */
174 0x01, 0x00, /* MR1 */
175 0x02, 0x0c, /* subc. freq. */
176 0x03, 0x8c, /* subc. freq. */
177 0x04, 0x79, /* subc. freq. */
178 0x05, 0x26, /* subc. freq. */
179 0x06, 0x40, /* subc. phase */
182 static const unsigned char init_ntsc[] = {
183 0x00, MR060, /* MR0, NTSC enabled */
184 0x01, 0x00, /* MR1 */
185 0x02, 0x55, /* subc. freq. */
186 0x03, 0x55, /* subc. freq. */
187 0x04, 0x55, /* subc. freq. */
188 0x05, 0x25, /* subc. freq. */
189 0x06, 0x1a, /* subc. phase */
192 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
194 /* This is just for testing!!! */
195 adv7175_write_block(sd, init_common, sizeof(init_common));
196 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
197 adv7175_write(sd, 0x07, TR0MODE);
201 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
203 struct adv7175 *encoder = to_adv7175(sd);
205 if (std & V4L2_STD_NTSC) {
206 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
207 if (encoder->input == 0)
208 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
209 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
210 adv7175_write(sd, 0x07, TR0MODE);
211 } else if (std & V4L2_STD_PAL) {
212 adv7175_write_block(sd, init_pal, sizeof(init_pal));
213 if (encoder->input == 0)
214 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
215 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
216 adv7175_write(sd, 0x07, TR0MODE);
217 } else if (std & V4L2_STD_SECAM) {
218 /* This is an attempt to convert
219 * SECAM->PAL (typically it does not work
220 * due to genlock: when decoder is in SECAM
221 * and encoder in in PAL the subcarrier can
222 * not be syncronized with horizontal
224 adv7175_write_block(sd, init_pal, sizeof(init_pal));
225 if (encoder->input == 0)
226 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
227 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
228 adv7175_write(sd, 0x07, TR0MODE);
230 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
231 (unsigned long long)std);
234 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
239 static int adv7175_s_routing(struct v4l2_subdev *sd,
240 u32 input, u32 output, u32 config)
242 struct adv7175 *encoder = to_adv7175(sd);
244 /* RJ: input = 0: input is from decoder
245 input = 1: input is from ZR36060
246 input = 2: color bar */
250 adv7175_write(sd, 0x01, 0x00);
252 if (encoder->norm & V4L2_STD_NTSC)
253 set_subcarrier_freq(sd, 1);
255 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */
256 if (encoder->norm & V4L2_STD_SECAM)
257 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
259 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
260 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
261 adv7175_write(sd, 0x07, TR0MODE);
266 adv7175_write(sd, 0x01, 0x00);
268 if (encoder->norm & V4L2_STD_NTSC)
269 set_subcarrier_freq(sd, 0);
271 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */
272 adv7175_write(sd, 0x0d, 0x49);
273 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
274 adv7175_write(sd, 0x07, TR0MODE);
279 adv7175_write(sd, 0x01, 0x80);
281 if (encoder->norm & V4L2_STD_NTSC)
282 set_subcarrier_freq(sd, 0);
284 adv7175_write(sd, 0x0d, 0x49);
285 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
286 adv7175_write(sd, 0x07, TR0MODE);
291 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
294 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
295 encoder->input = input;
299 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
301 struct i2c_client *client = v4l2_get_subdevdata(sd);
303 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
306 /* ----------------------------------------------------------------------- */
308 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
309 .g_chip_ident = adv7175_g_chip_ident,
310 .init = adv7175_init,
313 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
314 .s_std_output = adv7175_s_std_output,
315 .s_routing = adv7175_s_routing,
318 static const struct v4l2_subdev_ops adv7175_ops = {
319 .core = &adv7175_core_ops,
320 .video = &adv7175_video_ops,
323 /* ----------------------------------------------------------------------- */
325 static int adv7175_probe(struct i2c_client *client,
326 const struct i2c_device_id *id)
329 struct adv7175 *encoder;
330 struct v4l2_subdev *sd;
332 /* Check if the adapter supports the needed features */
333 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
336 v4l_info(client, "chip found @ 0x%x (%s)\n",
337 client->addr << 1, client->adapter->name);
339 encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
343 v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
344 encoder->norm = V4L2_STD_NTSC;
347 i = adv7175_write_block(sd, init_common, sizeof(init_common));
349 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
350 i = adv7175_write(sd, 0x07, TR0MODE);
351 i = adv7175_read(sd, 0x12);
352 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
355 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
359 static int adv7175_remove(struct i2c_client *client)
361 struct v4l2_subdev *sd = i2c_get_clientdata(client);
363 v4l2_device_unregister_subdev(sd);
364 kfree(to_adv7175(sd));
368 /* ----------------------------------------------------------------------- */
370 static const struct i2c_device_id adv7175_id[] = {
375 MODULE_DEVICE_TABLE(i2c, adv7175_id);
377 static struct i2c_driver adv7175_driver = {
379 .owner = THIS_MODULE,
382 .probe = adv7175_probe,
383 .remove = adv7175_remove,
384 .id_table = adv7175_id,
387 static __init int init_adv7175(void)
389 return i2c_add_driver(&adv7175_driver);
392 static __exit void exit_adv7175(void)
394 i2c_del_driver(&adv7175_driver);
397 module_init(init_adv7175);
398 module_exit(exit_adv7175);