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/i2c-id.h>
34 #include <linux/videodev2.h>
35 #include <media/v4l2-device.h>
36 #include <media/v4l2-chip-ident.h>
37 #include <media/v4l2-i2c-drv.h>
39 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
40 MODULE_AUTHOR("Dave Perks");
41 MODULE_LICENSE("GPL");
43 #define I2C_ADV7175 0xd4
44 #define I2C_ADV7176 0x54
48 module_param(debug, int, 0);
49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
51 /* ----------------------------------------------------------------------- */
54 struct v4l2_subdev sd;
59 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
61 return container_of(sd, struct adv7175, sd);
64 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
66 /* ----------------------------------------------------------------------- */
68 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
70 struct i2c_client *client = v4l2_get_subdevdata(sd);
72 return i2c_smbus_write_byte_data(client, reg, value);
75 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
77 struct i2c_client *client = v4l2_get_subdevdata(sd);
79 return i2c_smbus_read_byte_data(client, reg);
82 static int adv7175_write_block(struct v4l2_subdev *sd,
83 const u8 *data, unsigned int len)
85 struct i2c_client *client = v4l2_get_subdevdata(sd);
89 /* the adv7175 has an autoincrement function, use it if
90 * the adapter understands raw I2C */
91 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
92 /* do raw I2C, not smbus compatible */
98 block_data[block_len++] = reg = data[0];
100 block_data[block_len++] = data[1];
104 } while (len >= 2 && data[0] == reg && block_len < 32);
105 ret = i2c_master_send(client, block_data, block_len);
110 /* do some slow I2C emulation kind of thing */
113 ret = adv7175_write(sd, reg, *data++);
123 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
125 /* for some reason pass_through NTSC needs
126 * a different sub-carrier freq to remain stable. */
128 adv7175_write(sd, 0x02, 0x00);
130 adv7175_write(sd, 0x02, 0x55);
132 adv7175_write(sd, 0x03, 0x55);
133 adv7175_write(sd, 0x04, 0x55);
134 adv7175_write(sd, 0x05, 0x25);
137 /* ----------------------------------------------------------------------- */
138 /* Output filter: S-Video Composite */
140 #define MR050 0x11 /* 0x09 */
141 #define MR060 0x14 /* 0x0c */
143 /* ----------------------------------------------------------------------- */
151 static const unsigned char init_common[] = {
153 0x00, MR050, /* MR0, PAL enabled */
154 0x01, 0x00, /* MR1 */
155 0x02, 0x0c, /* subc. freq. */
156 0x03, 0x8c, /* subc. freq. */
157 0x04, 0x79, /* subc. freq. */
158 0x05, 0x26, /* subc. freq. */
159 0x06, 0x40, /* subc. phase */
161 0x07, TR0MODE, /* TR0, 16bit */
166 0x0c, TR1CAPT, /* TR1 */
167 0x0d, 0x4f, /* MR2 */
174 static const unsigned char init_pal[] = {
175 0x00, MR050, /* MR0, PAL enabled */
176 0x01, 0x00, /* MR1 */
177 0x02, 0x0c, /* subc. freq. */
178 0x03, 0x8c, /* subc. freq. */
179 0x04, 0x79, /* subc. freq. */
180 0x05, 0x26, /* subc. freq. */
181 0x06, 0x40, /* subc. phase */
184 static const unsigned char init_ntsc[] = {
185 0x00, MR060, /* MR0, NTSC enabled */
186 0x01, 0x00, /* MR1 */
187 0x02, 0x55, /* subc. freq. */
188 0x03, 0x55, /* subc. freq. */
189 0x04, 0x55, /* subc. freq. */
190 0x05, 0x25, /* subc. freq. */
191 0x06, 0x1a, /* subc. phase */
194 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
196 /* This is just for testing!!! */
197 adv7175_write_block(sd, init_common, sizeof(init_common));
198 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
199 adv7175_write(sd, 0x07, TR0MODE);
203 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
205 struct adv7175 *encoder = to_adv7175(sd);
207 if (std & V4L2_STD_NTSC) {
208 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
209 if (encoder->input == 0)
210 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
211 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
212 adv7175_write(sd, 0x07, TR0MODE);
213 } else if (std & V4L2_STD_PAL) {
214 adv7175_write_block(sd, init_pal, sizeof(init_pal));
215 if (encoder->input == 0)
216 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
217 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
218 adv7175_write(sd, 0x07, TR0MODE);
219 } else if (std & V4L2_STD_SECAM) {
220 /* This is an attempt to convert
221 * SECAM->PAL (typically it does not work
222 * due to genlock: when decoder is in SECAM
223 * and encoder in in PAL the subcarrier can
224 * not be syncronized with horizontal
226 adv7175_write_block(sd, init_pal, sizeof(init_pal));
227 if (encoder->input == 0)
228 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
229 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
230 adv7175_write(sd, 0x07, TR0MODE);
232 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
233 (unsigned long long)std);
236 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
241 static int adv7175_s_routing(struct v4l2_subdev *sd,
242 u32 input, u32 output, u32 config)
244 struct adv7175 *encoder = to_adv7175(sd);
246 /* RJ: input = 0: input is from decoder
247 input = 1: input is from ZR36060
248 input = 2: color bar */
252 adv7175_write(sd, 0x01, 0x00);
254 if (encoder->norm & V4L2_STD_NTSC)
255 set_subcarrier_freq(sd, 1);
257 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */
258 if (encoder->norm & V4L2_STD_SECAM)
259 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
261 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
262 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
263 adv7175_write(sd, 0x07, TR0MODE);
268 adv7175_write(sd, 0x01, 0x00);
270 if (encoder->norm & V4L2_STD_NTSC)
271 set_subcarrier_freq(sd, 0);
273 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */
274 adv7175_write(sd, 0x0d, 0x49);
275 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
276 adv7175_write(sd, 0x07, TR0MODE);
281 adv7175_write(sd, 0x01, 0x80);
283 if (encoder->norm & V4L2_STD_NTSC)
284 set_subcarrier_freq(sd, 0);
286 adv7175_write(sd, 0x0d, 0x49);
287 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
288 adv7175_write(sd, 0x07, TR0MODE);
293 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
296 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
297 encoder->input = input;
301 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
303 struct i2c_client *client = v4l2_get_subdevdata(sd);
305 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
308 /* ----------------------------------------------------------------------- */
310 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
311 .g_chip_ident = adv7175_g_chip_ident,
312 .init = adv7175_init,
315 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
316 .s_std_output = adv7175_s_std_output,
317 .s_routing = adv7175_s_routing,
320 static const struct v4l2_subdev_ops adv7175_ops = {
321 .core = &adv7175_core_ops,
322 .video = &adv7175_video_ops,
325 /* ----------------------------------------------------------------------- */
327 static int adv7175_probe(struct i2c_client *client,
328 const struct i2c_device_id *id)
331 struct adv7175 *encoder;
332 struct v4l2_subdev *sd;
334 /* Check if the adapter supports the needed features */
335 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
338 v4l_info(client, "chip found @ 0x%x (%s)\n",
339 client->addr << 1, client->adapter->name);
341 encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
345 v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
346 encoder->norm = V4L2_STD_NTSC;
349 i = adv7175_write_block(sd, init_common, sizeof(init_common));
351 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
352 i = adv7175_write(sd, 0x07, TR0MODE);
353 i = adv7175_read(sd, 0x12);
354 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
357 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
361 static int adv7175_remove(struct i2c_client *client)
363 struct v4l2_subdev *sd = i2c_get_clientdata(client);
365 v4l2_device_unregister_subdev(sd);
366 kfree(to_adv7175(sd));
370 /* ----------------------------------------------------------------------- */
372 static const struct i2c_device_id adv7175_id[] = {
377 MODULE_DEVICE_TABLE(i2c, adv7175_id);
379 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
381 .probe = adv7175_probe,
382 .remove = adv7175_remove,
383 .id_table = adv7175_id,