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adv7343.c
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1 /*
2  * adv7343 - ADV7343 Video Encoder Driver
3  *
4  * The encoder hardware does not support SECAM.
5  *
6  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation version 2.
11  *
12  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
13  * kind, whether express or implied; without even the implied warranty
14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  */
17 
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/ctype.h>
21 #include <linux/slab.h>
22 #include <linux/i2c.h>
23 #include <linux/device.h>
24 #include <linux/delay.h>
25 #include <linux/module.h>
26 #include <linux/videodev2.h>
27 #include <linux/uaccess.h>
28 
29 #include <media/adv7343.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-chip-ident.h>
32 #include <media/v4l2-ctrls.h>
33 
34 #include "adv7343_regs.h"
35 
36 MODULE_DESCRIPTION("ADV7343 video encoder driver");
37 MODULE_LICENSE("GPL");
38 
39 static int debug;
40 module_param(debug, int, 0644);
41 MODULE_PARM_DESC(debug, "Debug level 0-1");
42 
43 struct adv7343_state {
44  struct v4l2_subdev sd;
54 };
55 
56 static inline struct adv7343_state *to_state(struct v4l2_subdev *sd)
57 {
58  return container_of(sd, struct adv7343_state, sd);
59 }
60 
61 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
62 {
63  return &container_of(ctrl->handler, struct adv7343_state, hdl)->sd;
64 }
65 
66 static inline int adv7343_write(struct v4l2_subdev *sd, u8 reg, u8 value)
67 {
68  struct i2c_client *client = v4l2_get_subdevdata(sd);
69 
70  return i2c_smbus_write_byte_data(client, reg, value);
71 }
72 
73 static const u8 adv7343_init_reg_val[] = {
76 
84 
93 
97 };
98 
99 /*
100  * 2^32
101  * FSC(reg) = FSC (HZ) * --------
102  * 27000000
103  */
104 static const struct adv7343_std_info stdinfo[] = {
105  {
106  /* FSC(Hz) = 3,579,545.45 Hz */
107  SD_STD_NTSC, 569408542, V4L2_STD_NTSC,
108  }, {
109  /* FSC(Hz) = 3,575,611.00 Hz */
110  SD_STD_PAL_M, 568782678, V4L2_STD_PAL_M,
111  }, {
112  /* FSC(Hz) = 3,582,056.00 */
113  SD_STD_PAL_N, 569807903, V4L2_STD_PAL_Nc,
114  }, {
115  /* FSC(Hz) = 4,433,618.75 Hz */
116  SD_STD_PAL_N, 705268427, V4L2_STD_PAL_N,
117  }, {
118  /* FSC(Hz) = 4,433,618.75 Hz */
119  SD_STD_PAL_BDGHI, 705268427, V4L2_STD_PAL,
120  }, {
121  /* FSC(Hz) = 4,433,618.75 Hz */
122  SD_STD_NTSC, 705268427, V4L2_STD_NTSC_443,
123  }, {
124  /* FSC(Hz) = 4,433,618.75 Hz */
125  SD_STD_PAL_M, 705268427, V4L2_STD_PAL_60,
126  },
127 };
128 
129 static int adv7343_setstd(struct v4l2_subdev *sd, v4l2_std_id std)
130 {
131  struct adv7343_state *state = to_state(sd);
132  struct adv7343_std_info *std_info;
133  int num_std;
134  char *fsc_ptr;
135  u8 reg, val;
136  int err = 0;
137  int i = 0;
138 
139  std_info = (struct adv7343_std_info *)stdinfo;
140  num_std = ARRAY_SIZE(stdinfo);
141 
142  for (i = 0; i < num_std; i++) {
143  if (std_info[i].stdid & std)
144  break;
145  }
146 
147  if (i == num_std) {
148  v4l2_dbg(1, debug, sd,
149  "Invalid std or std is not supported: %llx\n",
150  (unsigned long long)std);
151  return -EINVAL;
152  }
153 
154  /* Set the standard */
155  val = state->reg80 & (~(SD_STD_MASK));
156  val |= std_info[i].standard_val3;
157  err = adv7343_write(sd, ADV7343_SD_MODE_REG1, val);
158  if (err < 0)
159  goto setstd_exit;
160 
161  state->reg80 = val;
162 
163  /* Configure the input mode register */
164  val = state->reg01 & (~((u8) INPUT_MODE_MASK));
165  val |= SD_INPUT_MODE;
166  err = adv7343_write(sd, ADV7343_MODE_SELECT_REG, val);
167  if (err < 0)
168  goto setstd_exit;
169 
170  state->reg01 = val;
171 
172  /* Program the sub carrier frequency registers */
173  fsc_ptr = (unsigned char *)&std_info[i].fsc_val;
174  reg = ADV7343_FSC_REG0;
175  for (i = 0; i < 4; i++, reg++, fsc_ptr++) {
176  err = adv7343_write(sd, reg, *fsc_ptr);
177  if (err < 0)
178  goto setstd_exit;
179  }
180 
181  val = state->reg80;
182 
183  /* Filter settings */
184  if (std & (V4L2_STD_NTSC | V4L2_STD_NTSC_443))
185  val &= 0x03;
186  else if (std & ~V4L2_STD_SECAM)
187  val |= 0x04;
188 
189  err = adv7343_write(sd, ADV7343_SD_MODE_REG1, val);
190  if (err < 0)
191  goto setstd_exit;
192 
193  state->reg80 = val;
194 
195 setstd_exit:
196  if (err != 0)
197  v4l2_err(sd, "Error setting std, write failed\n");
198 
199  return err;
200 }
201 
202 static int adv7343_setoutput(struct v4l2_subdev *sd, u32 output_type)
203 {
204  struct adv7343_state *state = to_state(sd);
205  unsigned char val;
206  int err = 0;
207 
208  if (output_type > ADV7343_SVIDEO_ID) {
209  v4l2_dbg(1, debug, sd,
210  "Invalid output type or output type not supported:%d\n",
211  output_type);
212  return -EINVAL;
213  }
214 
215  /* Enable Appropriate DAC */
216  val = state->reg00 & 0x03;
217 
218  if (output_type == ADV7343_COMPOSITE_ID)
220  else if (output_type == ADV7343_COMPONENT_ID)
222  else
224 
225  err = adv7343_write(sd, ADV7343_POWER_MODE_REG, val);
226  if (err < 0)
227  goto setoutput_exit;
228 
229  state->reg00 = val;
230 
231  /* Enable YUV output */
232  val = state->reg02 | YUV_OUTPUT_SELECT;
233  err = adv7343_write(sd, ADV7343_MODE_REG0, val);
234  if (err < 0)
235  goto setoutput_exit;
236 
237  state->reg02 = val;
238 
239  /* configure SD DAC Output 2 and SD DAC Output 1 bit to zero */
240  val = state->reg82 & (SD_DAC_1_DI & SD_DAC_2_DI);
241  err = adv7343_write(sd, ADV7343_SD_MODE_REG2, val);
242  if (err < 0)
243  goto setoutput_exit;
244 
245  state->reg82 = val;
246 
247  /* configure ED/HD Color DAC Swap and ED/HD RGB Input Enable bit to
248  * zero */
249  val = state->reg35 & (HD_RGB_INPUT_DI & HD_DAC_SWAP_DI);
250  err = adv7343_write(sd, ADV7343_HD_MODE_REG6, val);
251  if (err < 0)
252  goto setoutput_exit;
253 
254  state->reg35 = val;
255 
256 setoutput_exit:
257  if (err != 0)
258  v4l2_err(sd, "Error setting output, write failed\n");
259 
260  return err;
261 }
262 
263 static int adv7343_log_status(struct v4l2_subdev *sd)
264 {
265  struct adv7343_state *state = to_state(sd);
266 
267  v4l2_info(sd, "Standard: %llx\n", (unsigned long long)state->std);
268  v4l2_info(sd, "Output: %s\n", (state->output == 0) ? "Composite" :
269  ((state->output == 1) ? "Component" : "S-Video"));
270  return 0;
271 }
272 
273 static int adv7343_s_ctrl(struct v4l2_ctrl *ctrl)
274 {
275  struct v4l2_subdev *sd = to_sd(ctrl);
276 
277  switch (ctrl->id) {
278  case V4L2_CID_BRIGHTNESS:
279  return adv7343_write(sd, ADV7343_SD_BRIGHTNESS_WSS,
280  ctrl->val);
281 
282  case V4L2_CID_HUE:
283  return adv7343_write(sd, ADV7343_SD_HUE_REG, ctrl->val);
284 
285  case V4L2_CID_GAIN:
286  return adv7343_write(sd, ADV7343_DAC2_OUTPUT_LEVEL, ctrl->val);
287  }
288  return -EINVAL;
289 }
290 
291 static int adv7343_g_chip_ident(struct v4l2_subdev *sd,
292  struct v4l2_dbg_chip_ident *chip)
293 {
294  struct i2c_client *client = v4l2_get_subdevdata(sd);
295 
296  return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7343, 0);
297 }
298 
299 static const struct v4l2_ctrl_ops adv7343_ctrl_ops = {
300  .s_ctrl = adv7343_s_ctrl,
301 };
302 
303 static const struct v4l2_subdev_core_ops adv7343_core_ops = {
304  .log_status = adv7343_log_status,
305  .g_chip_ident = adv7343_g_chip_ident,
306  .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
307  .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
308  .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
309  .g_ctrl = v4l2_subdev_g_ctrl,
310  .s_ctrl = v4l2_subdev_s_ctrl,
311  .queryctrl = v4l2_subdev_queryctrl,
312  .querymenu = v4l2_subdev_querymenu,
313 };
314 
315 static int adv7343_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
316 {
317  struct adv7343_state *state = to_state(sd);
318  int err = 0;
319 
320  if (state->std == std)
321  return 0;
322 
323  err = adv7343_setstd(sd, std);
324  if (!err)
325  state->std = std;
326 
327  return err;
328 }
329 
330 static int adv7343_s_routing(struct v4l2_subdev *sd,
332 {
333  struct adv7343_state *state = to_state(sd);
334  int err = 0;
335 
336  if (state->output == output)
337  return 0;
338 
339  err = adv7343_setoutput(sd, output);
340  if (!err)
341  state->output = output;
342 
343  return err;
344 }
345 
346 static const struct v4l2_subdev_video_ops adv7343_video_ops = {
347  .s_std_output = adv7343_s_std_output,
348  .s_routing = adv7343_s_routing,
349 };
350 
351 static const struct v4l2_subdev_ops adv7343_ops = {
352  .core = &adv7343_core_ops,
353  .video = &adv7343_video_ops,
354 };
355 
356 static int adv7343_initialize(struct v4l2_subdev *sd)
357 {
358  struct adv7343_state *state = to_state(sd);
359  int err = 0;
360  int i;
361 
362  for (i = 0; i < ARRAY_SIZE(adv7343_init_reg_val); i += 2) {
363 
364  err = adv7343_write(sd, adv7343_init_reg_val[i],
365  adv7343_init_reg_val[i+1]);
366  if (err) {
367  v4l2_err(sd, "Error initializing\n");
368  return err;
369  }
370  }
371 
372  /* Configure for default video standard */
373  err = adv7343_setoutput(sd, state->output);
374  if (err < 0) {
375  v4l2_err(sd, "Error setting output during init\n");
376  return -EINVAL;
377  }
378 
379  err = adv7343_setstd(sd, state->std);
380  if (err < 0) {
381  v4l2_err(sd, "Error setting std during init\n");
382  return -EINVAL;
383  }
384 
385  return err;
386 }
387 
388 static int adv7343_probe(struct i2c_client *client,
389  const struct i2c_device_id *id)
390 {
391  struct adv7343_state *state;
392  int err;
393 
394  if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
395  return -ENODEV;
396 
397  v4l_info(client, "chip found @ 0x%x (%s)\n",
398  client->addr << 1, client->adapter->name);
399 
400  state = kzalloc(sizeof(struct adv7343_state), GFP_KERNEL);
401  if (state == NULL)
402  return -ENOMEM;
403 
404  state->reg00 = 0x80;
405  state->reg01 = 0x00;
406  state->reg02 = 0x20;
407  state->reg35 = 0x00;
410 
411  state->output = ADV7343_COMPOSITE_ID;
412  state->std = V4L2_STD_NTSC;
413 
414  v4l2_i2c_subdev_init(&state->sd, client, &adv7343_ops);
415 
416  v4l2_ctrl_handler_init(&state->hdl, 2);
417  v4l2_ctrl_new_std(&state->hdl, &adv7343_ctrl_ops,
421  v4l2_ctrl_new_std(&state->hdl, &adv7343_ctrl_ops,
423  ADV7343_HUE_MAX, 1,
425  v4l2_ctrl_new_std(&state->hdl, &adv7343_ctrl_ops,
427  ADV7343_GAIN_MAX, 1,
429  state->sd.ctrl_handler = &state->hdl;
430  if (state->hdl.error) {
431  int err = state->hdl.error;
432 
433  v4l2_ctrl_handler_free(&state->hdl);
434  kfree(state);
435  return err;
436  }
437  v4l2_ctrl_handler_setup(&state->hdl);
438 
439  err = adv7343_initialize(&state->sd);
440  if (err) {
441  v4l2_ctrl_handler_free(&state->hdl);
442  kfree(state);
443  }
444  return err;
445 }
446 
447 static int adv7343_remove(struct i2c_client *client)
448 {
449  struct v4l2_subdev *sd = i2c_get_clientdata(client);
450  struct adv7343_state *state = to_state(sd);
451 
453  v4l2_ctrl_handler_free(&state->hdl);
454  kfree(state);
455 
456  return 0;
457 }
458 
459 static const struct i2c_device_id adv7343_id[] = {
460  {"adv7343", 0},
461  {},
462 };
463 
464 MODULE_DEVICE_TABLE(i2c, adv7343_id);
465 
466 static struct i2c_driver adv7343_driver = {
467  .driver = {
468  .owner = THIS_MODULE,
469  .name = "adv7343",
470  },
471  .probe = adv7343_probe,
472  .remove = adv7343_remove,
473  .id_table = adv7343_id,
474 };
475 
476 module_i2c_driver(adv7343_driver);