drivers/media/i2c/adv7393.c

   1 /*
   2  * adv7393 - ADV7393 Video Encoder Driver
   3  *
   4  * The encoder hardware does not support SECAM.
   5  *
   6  * Copyright (C) 2010-2012 ADVANSEE - http://www.advansee.com/
   7  * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
   8  *
   9  * Based on ADV7343 driver,
  10  *
  11  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation version 2.
  16  *
  17  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
  18  * kind, whether express or implied; without even the implied warranty
  19  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  */
  22
  23 #include <linux/kernel.h>
  24 #include <linux/init.h>
  25 #include <linux/ctype.h>
  26 #include <linux/slab.h>
  27 #include <linux/i2c.h>
  28 #include <linux/device.h>
  29 #include <linux/delay.h>
  30 #include <linux/module.h>
  31 #include <linux/videodev2.h>
  32 #include <linux/uaccess.h>
  33
  34 #include <media/adv7393.h>
  35 #include <media/v4l2-device.h>
  36 #include <media/v4l2-ctrls.h>
  37
  38 #include "adv7393_regs.h"
  39
  40 MODULE_DESCRIPTION("ADV7393 video encoder driver");
  41 MODULE_LICENSE("GPL");
  42
  43 static bool debug;
  44 module_param(debug, bool, 0644);
  45 MODULE_PARM_DESC(debug, "Debug level 0-1");
  46
  47 struct adv7393_state {
  48         struct v4l2_subdev sd;
  49         struct v4l2_ctrl_handler hdl;
  50         u8 reg00;
  51         u8 reg01;
  52         u8 reg02;
  53         u8 reg35;
  54         u8 reg80;
  55         u8 reg82;
  56         u32 output;
  57         v4l2_std_id std;
  58 };
  59
  60 static inline struct adv7393_state *to_state(struct v4l2_subdev *sd)
  61 {
  62         return container_of(sd, struct adv7393_state, sd);
  63 }
  64
  65 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  66 {
  67         return &container_of(ctrl->handler, struct adv7393_state, hdl)->sd;
  68 }
  69
  70 static inline int adv7393_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  71 {
  72         struct i2c_client *client = v4l2_get_subdevdata(sd);
  73
  74         return i2c_smbus_write_byte_data(client, reg, value);
  75 }
  76
  77 static const u8 adv7393_init_reg_val[] = {
  78         ADV7393_SOFT_RESET, ADV7393_SOFT_RESET_DEFAULT,
  79         ADV7393_POWER_MODE_REG, ADV7393_POWER_MODE_REG_DEFAULT,
  80
  81         ADV7393_HD_MODE_REG1, ADV7393_HD_MODE_REG1_DEFAULT,
  82         ADV7393_HD_MODE_REG2, ADV7393_HD_MODE_REG2_DEFAULT,
  83         ADV7393_HD_MODE_REG3, ADV7393_HD_MODE_REG3_DEFAULT,
  84         ADV7393_HD_MODE_REG4, ADV7393_HD_MODE_REG4_DEFAULT,
  85         ADV7393_HD_MODE_REG5, ADV7393_HD_MODE_REG5_DEFAULT,
  86         ADV7393_HD_MODE_REG6, ADV7393_HD_MODE_REG6_DEFAULT,
  87         ADV7393_HD_MODE_REG7, ADV7393_HD_MODE_REG7_DEFAULT,
  88
  89         ADV7393_SD_MODE_REG1, ADV7393_SD_MODE_REG1_DEFAULT,
  90         ADV7393_SD_MODE_REG2, ADV7393_SD_MODE_REG2_DEFAULT,
  91         ADV7393_SD_MODE_REG3, ADV7393_SD_MODE_REG3_DEFAULT,
  92         ADV7393_SD_MODE_REG4, ADV7393_SD_MODE_REG4_DEFAULT,
  93         ADV7393_SD_MODE_REG5, ADV7393_SD_MODE_REG5_DEFAULT,
  94         ADV7393_SD_MODE_REG6, ADV7393_SD_MODE_REG6_DEFAULT,
  95         ADV7393_SD_MODE_REG7, ADV7393_SD_MODE_REG7_DEFAULT,
  96         ADV7393_SD_MODE_REG8, ADV7393_SD_MODE_REG8_DEFAULT,
  97
  98         ADV7393_SD_TIMING_REG0, ADV7393_SD_TIMING_REG0_DEFAULT,
  99
 100         ADV7393_SD_HUE_ADJUST, ADV7393_SD_HUE_ADJUST_DEFAULT,
 101         ADV7393_SD_CGMS_WSS0, ADV7393_SD_CGMS_WSS0_DEFAULT,
 102         ADV7393_SD_BRIGHTNESS_WSS, ADV7393_SD_BRIGHTNESS_WSS_DEFAULT,
 103 };
 104
 105 /*
 106  *                          2^32
 107  * FSC(reg) =  FSC (HZ) * --------
 108  *                        27000000
 109  */
 110 static const struct adv7393_std_info stdinfo[] = {
 111         {
 112                 /* FSC(Hz) = 4,433,618.75 Hz */
 113                 SD_STD_NTSC, 705268427, V4L2_STD_NTSC_443,
 114         }, {
 115                 /* FSC(Hz) = 3,579,545.45 Hz */
 116                 SD_STD_NTSC, 569408542, V4L2_STD_NTSC,
 117         }, {
 118                 /* FSC(Hz) = 3,575,611.00 Hz */
 119                 SD_STD_PAL_M, 568782678, V4L2_STD_PAL_M,
 120         }, {
 121                 /* FSC(Hz) = 3,582,056.00 Hz */
 122                 SD_STD_PAL_N, 569807903, V4L2_STD_PAL_Nc,
 123         }, {
 124                 /* FSC(Hz) = 4,433,618.75 Hz */
 125                 SD_STD_PAL_N, 705268427, V4L2_STD_PAL_N,
 126         }, {
 127                 /* FSC(Hz) = 4,433,618.75 Hz */
 128                 SD_STD_PAL_M, 705268427, V4L2_STD_PAL_60,
 129         }, {
 130                 /* FSC(Hz) = 4,433,618.75 Hz */
 131                 SD_STD_PAL_BDGHI, 705268427, V4L2_STD_PAL,
 132         },
 133 };
 134
 135 static int adv7393_setstd(struct v4l2_subdev *sd, v4l2_std_id std)
 136 {
 137         struct adv7393_state *state = to_state(sd);
 138         const struct adv7393_std_info *std_info;
 139         int num_std;
 140         u8 reg;
 141         u32 val;
 142         int err = 0;
 143         int i;
 144
 145         num_std = ARRAY_SIZE(stdinfo);
 146
 147         for (i = 0; i < num_std; i++) {
 148                 if (stdinfo[i].stdid & std)
 149                         break;
 150         }
 151
 152         if (i == num_std) {
 153                 v4l2_dbg(1, debug, sd,
 154                                 "Invalid std or std is not supported: %llx\n",
 155                                                 (unsigned long long)std);
 156                 return -EINVAL;
 157         }
 158
 159         std_info = &stdinfo[i];
 160
 161         /* Set the standard */
 162         val = state->reg80 & ~SD_STD_MASK;
 163         val |= std_info->standard_val3;
 164         err = adv7393_write(sd, ADV7393_SD_MODE_REG1, val);
 165         if (err < 0)
 166                 goto setstd_exit;
 167
 168         state->reg80 = val;
 169
 170         /* Configure the input mode register */
 171         val = state->reg01 & ~INPUT_MODE_MASK;
 172         val |= SD_INPUT_MODE;
 173         err = adv7393_write(sd, ADV7393_MODE_SELECT_REG, val);
 174         if (err < 0)
 175                 goto setstd_exit;
 176
 177         state->reg01 = val;
 178
 179         /* Program the sub carrier frequency registers */
 180         val = std_info->fsc_val;
 181         for (reg = ADV7393_FSC_REG0; reg <= ADV7393_FSC_REG3; reg++) {
 182                 err = adv7393_write(sd, reg, val);
 183                 if (err < 0)
 184                         goto setstd_exit;
 185                 val >>= 8;
 186         }
 187
 188         val = state->reg82;
 189
 190         /* Pedestal settings */
 191         if (std & (V4L2_STD_NTSC | V4L2_STD_NTSC_443))
 192                 val |= SD_PEDESTAL_EN;
 193         else
 194                 val &= SD_PEDESTAL_DI;
 195
 196         err = adv7393_write(sd, ADV7393_SD_MODE_REG2, val);
 197         if (err < 0)
 198                 goto setstd_exit;
 199
 200         state->reg82 = val;
 201
 202 setstd_exit:
 203         if (err != 0)
 204                 v4l2_err(sd, "Error setting std, write failed\n");
 205
 206         return err;
 207 }
 208
 209 static int adv7393_setoutput(struct v4l2_subdev *sd, u32 output_type)
 210 {
 211         struct adv7393_state *state = to_state(sd);
 212         u8 val;
 213         int err = 0;
 214
 215         if (output_type > ADV7393_SVIDEO_ID) {
 216                 v4l2_dbg(1, debug, sd,
 217                         "Invalid output type or output type not supported:%d\n",
 218                                                                 output_type);
 219                 return -EINVAL;
 220         }
 221
 222         /* Enable Appropriate DAC */
 223         val = state->reg00 & 0x03;
 224
 225         if (output_type == ADV7393_COMPOSITE_ID)
 226                 val |= ADV7393_COMPOSITE_POWER_VALUE;
 227         else if (output_type == ADV7393_COMPONENT_ID)
 228                 val |= ADV7393_COMPONENT_POWER_VALUE;
 229         else
 230                 val |= ADV7393_SVIDEO_POWER_VALUE;
 231
 232         err = adv7393_write(sd, ADV7393_POWER_MODE_REG, val);
 233         if (err < 0)
 234                 goto setoutput_exit;
 235
 236         state->reg00 = val;
 237
 238         /* Enable YUV output */
 239         val = state->reg02 | YUV_OUTPUT_SELECT;
 240         err = adv7393_write(sd, ADV7393_MODE_REG0, val);
 241         if (err < 0)
 242                 goto setoutput_exit;
 243
 244         state->reg02 = val;
 245
 246         /* configure SD DAC Output 1 bit */
 247         val = state->reg82;
 248         if (output_type == ADV7393_COMPONENT_ID)
 249                 val &= SD_DAC_OUT1_DI;
 250         else
 251                 val |= SD_DAC_OUT1_EN;
 252         err = adv7393_write(sd, ADV7393_SD_MODE_REG2, val);
 253         if (err < 0)
 254                 goto setoutput_exit;
 255
 256         state->reg82 = val;
 257
 258         /* configure ED/HD Color DAC Swap bit to zero */
 259         val = state->reg35 & HD_DAC_SWAP_DI;
 260         err = adv7393_write(sd, ADV7393_HD_MODE_REG6, val);
 261         if (err < 0)
 262                 goto setoutput_exit;
 263
 264         state->reg35 = val;
 265
 266 setoutput_exit:
 267         if (err != 0)
 268                 v4l2_err(sd, "Error setting output, write failed\n");
 269
 270         return err;
 271 }
 272
 273 static int adv7393_log_status(struct v4l2_subdev *sd)
 274 {
 275         struct adv7393_state *state = to_state(sd);
 276
 277         v4l2_info(sd, "Standard: %llx\n", (unsigned long long)state->std);
 278         v4l2_info(sd, "Output: %s\n", (state->output == 0) ? "Composite" :
 279                         ((state->output == 1) ? "Component" : "S-Video"));
 280         return 0;
 281 }
 282
 283 static int adv7393_s_ctrl(struct v4l2_ctrl *ctrl)
 284 {
 285         struct v4l2_subdev *sd = to_sd(ctrl);
 286
 287         switch (ctrl->id) {
 288         case V4L2_CID_BRIGHTNESS:
 289                 return adv7393_write(sd, ADV7393_SD_BRIGHTNESS_WSS,
 290                                         ctrl->val & SD_BRIGHTNESS_VALUE_MASK);
 291
 292         case V4L2_CID_HUE:
 293                 return adv7393_write(sd, ADV7393_SD_HUE_ADJUST,
 294                                         ctrl->val - ADV7393_HUE_MIN);
 295
 296         case V4L2_CID_GAIN:
 297                 return adv7393_write(sd, ADV7393_DAC123_OUTPUT_LEVEL,
 298                                         ctrl->val);
 299         }
 300         return -EINVAL;
 301 }
 302
 303 static const struct v4l2_ctrl_ops adv7393_ctrl_ops = {
 304         .s_ctrl = adv7393_s_ctrl,
 305 };
 306
 307 static const struct v4l2_subdev_core_ops adv7393_core_ops = {
 308         .log_status = adv7393_log_status,
 309 };
 310
 311 static int adv7393_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 312 {
 313         struct adv7393_state *state = to_state(sd);
 314         int err = 0;
 315
 316         if (state->std == std)
 317                 return 0;
 318
 319         err = adv7393_setstd(sd, std);
 320         if (!err)
 321                 state->std = std;
 322
 323         return err;
 324 }
 325
 326 static int adv7393_s_routing(struct v4l2_subdev *sd,
 327                 u32 input, u32 output, u32 config)
 328 {
 329         struct adv7393_state *state = to_state(sd);
 330         int err = 0;
 331
 332         if (state->output == output)
 333                 return 0;
 334
 335         err = adv7393_setoutput(sd, output);
 336         if (!err)
 337                 state->output = output;
 338
 339         return err;
 340 }
 341
 342 static const struct v4l2_subdev_video_ops adv7393_video_ops = {
 343         .s_std_output   = adv7393_s_std_output,
 344         .s_routing      = adv7393_s_routing,
 345 };
 346
 347 static const struct v4l2_subdev_ops adv7393_ops = {
 348         .core   = &adv7393_core_ops,
 349         .video  = &adv7393_video_ops,
 350 };
 351
 352 static int adv7393_initialize(struct v4l2_subdev *sd)
 353 {
 354         struct adv7393_state *state = to_state(sd);
 355         int err = 0;
 356         int i;
 357
 358         for (i = 0; i < ARRAY_SIZE(adv7393_init_reg_val); i += 2) {
 359
 360                 err = adv7393_write(sd, adv7393_init_reg_val[i],
 361                                         adv7393_init_reg_val[i+1]);
 362                 if (err) {
 363                         v4l2_err(sd, "Error initializing\n");
 364                         return err;
 365                 }
 366         }
 367
 368         /* Configure for default video standard */
 369         err = adv7393_setoutput(sd, state->output);
 370         if (err < 0) {
 371                 v4l2_err(sd, "Error setting output during init\n");
 372                 return -EINVAL;
 373         }
 374
 375         err = adv7393_setstd(sd, state->std);
 376         if (err < 0) {
 377                 v4l2_err(sd, "Error setting std during init\n");
 378                 return -EINVAL;
 379         }
 380
 381         return err;
 382 }
 383
 384 static int adv7393_probe(struct i2c_client *client,
 385                                 const struct i2c_device_id *id)
 386 {
 387         struct adv7393_state *state;
 388         int err;
 389
 390         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 391                 return -ENODEV;
 392
 393         v4l_info(client, "chip found @ 0x%x (%s)\n",
 394                         client->addr << 1, client->adapter->name);
 395
 396         state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
 397         if (state == NULL)
 398                 return -ENOMEM;
 399
 400         state->reg00    = ADV7393_POWER_MODE_REG_DEFAULT;
 401         state->reg01    = 0x00;
 402         state->reg02    = 0x20;
 403         state->reg35    = ADV7393_HD_MODE_REG6_DEFAULT;
 404         state->reg80    = ADV7393_SD_MODE_REG1_DEFAULT;
 405         state->reg82    = ADV7393_SD_MODE_REG2_DEFAULT;
 406
 407         state->output = ADV7393_COMPOSITE_ID;
 408         state->std = V4L2_STD_NTSC;
 409
 410         v4l2_i2c_subdev_init(&state->sd, client, &adv7393_ops);
 411
 412         v4l2_ctrl_handler_init(&state->hdl, 3);
 413         v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
 414                         V4L2_CID_BRIGHTNESS, ADV7393_BRIGHTNESS_MIN,
 415                                              ADV7393_BRIGHTNESS_MAX, 1,
 416                                              ADV7393_BRIGHTNESS_DEF);
 417         v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
 418                         V4L2_CID_HUE, ADV7393_HUE_MIN,
 419                                       ADV7393_HUE_MAX, 1,
 420                                       ADV7393_HUE_DEF);
 421         v4l2_ctrl_new_std(&state->hdl, &adv7393_ctrl_ops,
 422                         V4L2_CID_GAIN, ADV7393_GAIN_MIN,
 423                                        ADV7393_GAIN_MAX, 1,
 424                                        ADV7393_GAIN_DEF);
 425         state->sd.ctrl_handler = &state->hdl;
 426         if (state->hdl.error) {
 427                 int err = state->hdl.error;
 428
 429                 v4l2_ctrl_handler_free(&state->hdl);
 430                 return err;
 431         }
 432         v4l2_ctrl_handler_setup(&state->hdl);
 433
 434         err = adv7393_initialize(&state->sd);
 435         if (err)
 436                 v4l2_ctrl_handler_free(&state->hdl);
 437         return err;
 438 }
 439
 440 static int adv7393_remove(struct i2c_client *client)
 441 {
 442         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 443         struct adv7393_state *state = to_state(sd);
 444
 445         v4l2_device_unregister_subdev(sd);
 446         v4l2_ctrl_handler_free(&state->hdl);
 447
 448         return 0;
 449 }
 450
 451 static const struct i2c_device_id adv7393_id[] = {
 452         {"adv7393", 0},
 453         {},
 454 };
 455 MODULE_DEVICE_TABLE(i2c, adv7393_id);
 456
 457 static struct i2c_driver adv7393_driver = {
 458         .driver = {
 459                 .owner  = THIS_MODULE,
 460                 .name   = "adv7393",
 461         },
 462         .probe          = adv7393_probe,
 463         .remove         = adv7393_remove,
 464         .id_table       = adv7393_id,
 465 };
 466 module_i2c_driver(adv7393_driver);