drivers/media/i2c/adv748x/adv748x-afe.c

   1 /*
   2  * Driver for Analog Devices ADV748X 8 channel analog front end (AFE) receiver
   3  * with standard definition processor (SDP)
   4  *
   5  * Copyright (C) 2017 Renesas Electronics Corp.
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/module.h>
  15 #include <linux/mutex.h>
  16 #include <linux/v4l2-dv-timings.h>
  17
  18 #include <media/v4l2-ctrls.h>
  19 #include <media/v4l2-device.h>
  20 #include <media/v4l2-dv-timings.h>
  21 #include <media/v4l2-ioctl.h>
  22
  23 #include "adv748x.h"
  24
  25 /* -----------------------------------------------------------------------------
  26  * SDP
  27  */
  28
  29 #define ADV748X_AFE_STD_AD_PAL_BG_NTSC_J_SECAM          0x0
  30 #define ADV748X_AFE_STD_AD_PAL_BG_NTSC_J_SECAM_PED      0x1
  31 #define ADV748X_AFE_STD_AD_PAL_N_NTSC_J_SECAM           0x2
  32 #define ADV748X_AFE_STD_AD_PAL_N_NTSC_M_SECAM           0x3
  33 #define ADV748X_AFE_STD_NTSC_J                          0x4
  34 #define ADV748X_AFE_STD_NTSC_M                          0x5
  35 #define ADV748X_AFE_STD_PAL60                           0x6
  36 #define ADV748X_AFE_STD_NTSC_443                        0x7
  37 #define ADV748X_AFE_STD_PAL_BG                          0x8
  38 #define ADV748X_AFE_STD_PAL_N                           0x9
  39 #define ADV748X_AFE_STD_PAL_M                           0xa
  40 #define ADV748X_AFE_STD_PAL_M_PED                       0xb
  41 #define ADV748X_AFE_STD_PAL_COMB_N                      0xc
  42 #define ADV748X_AFE_STD_PAL_COMB_N_PED                  0xd
  43 #define ADV748X_AFE_STD_PAL_SECAM                       0xe
  44 #define ADV748X_AFE_STD_PAL_SECAM_PED                   0xf
  45
  46 static int adv748x_afe_read_ro_map(struct adv748x_state *state, u8 reg)
  47 {
  48         int ret;
  49
  50         /* Select SDP Read-Only Main Map */
  51         ret = sdp_write(state, ADV748X_SDP_MAP_SEL,
  52                         ADV748X_SDP_MAP_SEL_RO_MAIN);
  53         if (ret < 0)
  54                 return ret;
  55
  56         return sdp_read(state, reg);
  57 }
  58
  59 static int adv748x_afe_status(struct adv748x_afe *afe, u32 *signal,
  60                               v4l2_std_id *std)
  61 {
  62         struct adv748x_state *state = adv748x_afe_to_state(afe);
  63         int info;
  64
  65         /* Read status from reg 0x10 of SDP RO Map */
  66         info = adv748x_afe_read_ro_map(state, ADV748X_SDP_RO_10);
  67         if (info < 0)
  68                 return info;
  69
  70         if (signal)
  71                 *signal = info & ADV748X_SDP_RO_10_IN_LOCK ?
  72                                 0 : V4L2_IN_ST_NO_SIGNAL;
  73
  74         if (!std)
  75                 return 0;
  76
  77         /* Standard not valid if there is no signal */
  78         if (!(info & ADV748X_SDP_RO_10_IN_LOCK)) {
  79                 *std = V4L2_STD_UNKNOWN;
  80                 return 0;
  81         }
  82
  83         switch (info & 0x70) {
  84         case 0x00:
  85                 *std = V4L2_STD_NTSC;
  86                 break;
  87         case 0x10:
  88                 *std = V4L2_STD_NTSC_443;
  89                 break;
  90         case 0x20:
  91                 *std = V4L2_STD_PAL_M;
  92                 break;
  93         case 0x30:
  94                 *std = V4L2_STD_PAL_60;
  95                 break;
  96         case 0x40:
  97                 *std = V4L2_STD_PAL;
  98                 break;
  99         case 0x50:
 100                 *std = V4L2_STD_SECAM;
 101                 break;
 102         case 0x60:
 103                 *std = V4L2_STD_PAL_Nc | V4L2_STD_PAL_N;
 104                 break;
 105         case 0x70:
 106                 *std = V4L2_STD_SECAM;
 107                 break;
 108         default:
 109                 *std = V4L2_STD_UNKNOWN;
 110                 break;
 111         }
 112
 113         return 0;
 114 }
 115
 116 static void adv748x_afe_fill_format(struct adv748x_afe *afe,
 117                                     struct v4l2_mbus_framefmt *fmt)
 118 {
 119         memset(fmt, 0, sizeof(*fmt));
 120
 121         fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
 122         fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
 123         fmt->field = V4L2_FIELD_ALTERNATE;
 124
 125         fmt->width = 720;
 126         fmt->height = afe->curr_norm & V4L2_STD_525_60 ? 480 : 576;
 127
 128         /* Field height */
 129         fmt->height /= 2;
 130 }
 131
 132 static int adv748x_afe_std(v4l2_std_id std)
 133 {
 134         if (std == V4L2_STD_PAL_60)
 135                 return ADV748X_AFE_STD_PAL60;
 136         if (std == V4L2_STD_NTSC_443)
 137                 return ADV748X_AFE_STD_NTSC_443;
 138         if (std == V4L2_STD_PAL_N)
 139                 return ADV748X_AFE_STD_PAL_N;
 140         if (std == V4L2_STD_PAL_M)
 141                 return ADV748X_AFE_STD_PAL_M;
 142         if (std == V4L2_STD_PAL_Nc)
 143                 return ADV748X_AFE_STD_PAL_COMB_N;
 144         if (std & V4L2_STD_NTSC)
 145                 return ADV748X_AFE_STD_NTSC_M;
 146         if (std & V4L2_STD_PAL)
 147                 return ADV748X_AFE_STD_PAL_BG;
 148         if (std & V4L2_STD_SECAM)
 149                 return ADV748X_AFE_STD_PAL_SECAM;
 150
 151         return -EINVAL;
 152 }
 153
 154 static void adv748x_afe_set_video_standard(struct adv748x_state *state,
 155                                           int sdpstd)
 156 {
 157         sdp_clrset(state, ADV748X_SDP_VID_SEL, ADV748X_SDP_VID_SEL_MASK,
 158                    (sdpstd & 0xf) << ADV748X_SDP_VID_SEL_SHIFT);
 159 }
 160
 161 static int adv748x_afe_s_input(struct adv748x_afe *afe, unsigned int input)
 162 {
 163         struct adv748x_state *state = adv748x_afe_to_state(afe);
 164
 165         return sdp_write(state, ADV748X_SDP_INSEL, input);
 166 }
 167
 168 static int adv748x_afe_g_pixelaspect(struct v4l2_subdev *sd,
 169                                      struct v4l2_fract *aspect)
 170 {
 171         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 172
 173         if (afe->curr_norm & V4L2_STD_525_60) {
 174                 aspect->numerator = 11;
 175                 aspect->denominator = 10;
 176         } else {
 177                 aspect->numerator = 54;
 178                 aspect->denominator = 59;
 179         }
 180
 181         return 0;
 182 }
 183
 184 /* -----------------------------------------------------------------------------
 185  * v4l2_subdev_video_ops
 186  */
 187
 188 static int adv748x_afe_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
 189 {
 190         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 191
 192         *norm = afe->curr_norm;
 193
 194         return 0;
 195 }
 196
 197 static int adv748x_afe_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 198 {
 199         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 200         struct adv748x_state *state = adv748x_afe_to_state(afe);
 201         int afe_std = adv748x_afe_std(std);
 202
 203         if (afe_std < 0)
 204                 return afe_std;
 205
 206         mutex_lock(&state->mutex);
 207
 208         adv748x_afe_set_video_standard(state, afe_std);
 209         afe->curr_norm = std;
 210
 211         mutex_unlock(&state->mutex);
 212
 213         return 0;
 214 }
 215
 216 static int adv748x_afe_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 217 {
 218         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 219         struct adv748x_state *state = adv748x_afe_to_state(afe);
 220         int ret;
 221
 222         mutex_lock(&state->mutex);
 223
 224         if (afe->streaming) {
 225                 ret = -EBUSY;
 226                 goto unlock;
 227         }
 228
 229         /* Set auto detect mode */
 230         adv748x_afe_set_video_standard(state,
 231                                        ADV748X_AFE_STD_AD_PAL_BG_NTSC_J_SECAM);
 232
 233         msleep(100);
 234
 235         /* Read detected standard */
 236         ret = adv748x_afe_status(afe, NULL, std);
 237
 238         /* Restore original state */
 239         adv748x_afe_set_video_standard(state, afe->curr_norm);
 240
 241 unlock:
 242         mutex_unlock(&state->mutex);
 243
 244         return ret;
 245 }
 246
 247 static int adv748x_afe_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
 248 {
 249         *norm = V4L2_STD_ALL;
 250
 251         return 0;
 252 }
 253
 254 static int adv748x_afe_g_input_status(struct v4l2_subdev *sd, u32 *status)
 255 {
 256         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 257         struct adv748x_state *state = adv748x_afe_to_state(afe);
 258         int ret;
 259
 260         mutex_lock(&state->mutex);
 261
 262         ret = adv748x_afe_status(afe, status, NULL);
 263
 264         mutex_unlock(&state->mutex);
 265         return ret;
 266 }
 267
 268 static int adv748x_afe_s_stream(struct v4l2_subdev *sd, int enable)
 269 {
 270         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 271         struct adv748x_state *state = adv748x_afe_to_state(afe);
 272         int ret, signal = V4L2_IN_ST_NO_SIGNAL;
 273
 274         mutex_lock(&state->mutex);
 275
 276         if (enable) {
 277                 ret = adv748x_afe_s_input(afe, afe->input);
 278                 if (ret)
 279                         goto unlock;
 280         }
 281
 282         ret = adv748x_txb_power(state, enable);
 283         if (ret)
 284                 goto unlock;
 285
 286         afe->streaming = enable;
 287
 288         adv748x_afe_status(afe, &signal, NULL);
 289         if (signal != V4L2_IN_ST_NO_SIGNAL)
 290                 adv_dbg(state, "Detected SDP signal\n");
 291         else
 292                 adv_dbg(state, "Couldn't detect SDP video signal\n");
 293
 294 unlock:
 295         mutex_unlock(&state->mutex);
 296
 297         return ret;
 298 }
 299
 300 static const struct v4l2_subdev_video_ops adv748x_afe_video_ops = {
 301         .g_std = adv748x_afe_g_std,
 302         .s_std = adv748x_afe_s_std,
 303         .querystd = adv748x_afe_querystd,
 304         .g_tvnorms = adv748x_afe_g_tvnorms,
 305         .g_input_status = adv748x_afe_g_input_status,
 306         .s_stream = adv748x_afe_s_stream,
 307         .g_pixelaspect = adv748x_afe_g_pixelaspect,
 308 };
 309
 310 /* -----------------------------------------------------------------------------
 311  * v4l2_subdev_pad_ops
 312  */
 313
 314 static int adv748x_afe_propagate_pixelrate(struct adv748x_afe *afe)
 315 {
 316         struct v4l2_subdev *tx;
 317         unsigned int width, height, fps;
 318
 319         tx = adv748x_get_remote_sd(&afe->pads[ADV748X_AFE_SOURCE]);
 320         if (!tx)
 321                 return -ENOLINK;
 322
 323         width = 720;
 324         height = afe->curr_norm & V4L2_STD_525_60 ? 480 : 576;
 325         fps = afe->curr_norm & V4L2_STD_525_60 ? 30 : 25;
 326
 327         return adv748x_csi2_set_pixelrate(tx, width * height * fps);
 328 }
 329
 330 static int adv748x_afe_enum_mbus_code(struct v4l2_subdev *sd,
 331                                       struct v4l2_subdev_pad_config *cfg,
 332                                       struct v4l2_subdev_mbus_code_enum *code)
 333 {
 334         if (code->index != 0)
 335                 return -EINVAL;
 336
 337         code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 338
 339         return 0;
 340 }
 341
 342 static int adv748x_afe_get_format(struct v4l2_subdev *sd,
 343                                       struct v4l2_subdev_pad_config *cfg,
 344                                       struct v4l2_subdev_format *sdformat)
 345 {
 346         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 347         struct v4l2_mbus_framefmt *mbusformat;
 348
 349         /* It makes no sense to get the format of the analog sink pads */
 350         if (sdformat->pad != ADV748X_AFE_SOURCE)
 351                 return -EINVAL;
 352
 353         if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY) {
 354                 mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
 355                 sdformat->format = *mbusformat;
 356         } else {
 357                 adv748x_afe_fill_format(afe, &sdformat->format);
 358                 adv748x_afe_propagate_pixelrate(afe);
 359         }
 360
 361         return 0;
 362 }
 363
 364 static int adv748x_afe_set_format(struct v4l2_subdev *sd,
 365                                       struct v4l2_subdev_pad_config *cfg,
 366                                       struct v4l2_subdev_format *sdformat)
 367 {
 368         struct v4l2_mbus_framefmt *mbusformat;
 369
 370         /* It makes no sense to get the format of the analog sink pads */
 371         if (sdformat->pad != ADV748X_AFE_SOURCE)
 372                 return -EINVAL;
 373
 374         if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 375                 return adv748x_afe_get_format(sd, cfg, sdformat);
 376
 377         mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
 378         *mbusformat = sdformat->format;
 379
 380         return 0;
 381 }
 382
 383 static const struct v4l2_subdev_pad_ops adv748x_afe_pad_ops = {
 384         .enum_mbus_code = adv748x_afe_enum_mbus_code,
 385         .set_fmt = adv748x_afe_set_format,
 386         .get_fmt = adv748x_afe_get_format,
 387 };
 388
 389 /* -----------------------------------------------------------------------------
 390  * v4l2_subdev_ops
 391  */
 392
 393 static const struct v4l2_subdev_ops adv748x_afe_ops = {
 394         .video = &adv748x_afe_video_ops,
 395         .pad = &adv748x_afe_pad_ops,
 396 };
 397
 398 /* -----------------------------------------------------------------------------
 399  * Controls
 400  */
 401
 402 static const char * const afe_ctrl_frp_menu[] = {
 403         "Disabled",
 404         "Solid Blue",
 405         "Color Bars",
 406         "Grey Ramp",
 407         "Cb Ramp",
 408         "Cr Ramp",
 409         "Boundary"
 410 };
 411
 412 static int adv748x_afe_s_ctrl(struct v4l2_ctrl *ctrl)
 413 {
 414         struct adv748x_afe *afe = adv748x_ctrl_to_afe(ctrl);
 415         struct adv748x_state *state = adv748x_afe_to_state(afe);
 416         bool enable;
 417         int ret;
 418
 419         ret = sdp_write(state, 0x0e, 0x00);
 420         if (ret < 0)
 421                 return ret;
 422
 423         switch (ctrl->id) {
 424         case V4L2_CID_BRIGHTNESS:
 425                 ret = sdp_write(state, ADV748X_SDP_BRI, ctrl->val);
 426                 break;
 427         case V4L2_CID_HUE:
 428                 /* Hue is inverted according to HSL chart */
 429                 ret = sdp_write(state, ADV748X_SDP_HUE, -ctrl->val);
 430                 break;
 431         case V4L2_CID_CONTRAST:
 432                 ret = sdp_write(state, ADV748X_SDP_CON, ctrl->val);
 433                 break;
 434         case V4L2_CID_SATURATION:
 435                 ret = sdp_write(state, ADV748X_SDP_SD_SAT_U, ctrl->val);
 436                 if (ret)
 437                         break;
 438                 ret = sdp_write(state, ADV748X_SDP_SD_SAT_V, ctrl->val);
 439                 break;
 440         case V4L2_CID_TEST_PATTERN:
 441                 enable = !!ctrl->val;
 442
 443                 /* Enable/Disable Color bar test patterns */
 444                 ret = sdp_clrset(state, ADV748X_SDP_DEF, ADV748X_SDP_DEF_VAL_EN,
 445                                 enable);
 446                 if (ret)
 447                         break;
 448                 ret = sdp_clrset(state, ADV748X_SDP_FRP, ADV748X_SDP_FRP_MASK,
 449                                 enable ? ctrl->val - 1 : 0);
 450                 break;
 451         default:
 452                 return -EINVAL;
 453         }
 454
 455         return ret;
 456 }
 457
 458 static const struct v4l2_ctrl_ops adv748x_afe_ctrl_ops = {
 459         .s_ctrl = adv748x_afe_s_ctrl,
 460 };
 461
 462 static int adv748x_afe_init_controls(struct adv748x_afe *afe)
 463 {
 464         struct adv748x_state *state = adv748x_afe_to_state(afe);
 465
 466         v4l2_ctrl_handler_init(&afe->ctrl_hdl, 5);
 467
 468         /* Use our mutex for the controls */
 469         afe->ctrl_hdl.lock = &state->mutex;
 470
 471         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 472                           V4L2_CID_BRIGHTNESS, ADV748X_SDP_BRI_MIN,
 473                           ADV748X_SDP_BRI_MAX, 1, ADV748X_SDP_BRI_DEF);
 474         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 475                           V4L2_CID_CONTRAST, ADV748X_SDP_CON_MIN,
 476                           ADV748X_SDP_CON_MAX, 1, ADV748X_SDP_CON_DEF);
 477         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 478                           V4L2_CID_SATURATION, ADV748X_SDP_SAT_MIN,
 479                           ADV748X_SDP_SAT_MAX, 1, ADV748X_SDP_SAT_DEF);
 480         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 481                           V4L2_CID_HUE, ADV748X_SDP_HUE_MIN,
 482                           ADV748X_SDP_HUE_MAX, 1, ADV748X_SDP_HUE_DEF);
 483
 484         v4l2_ctrl_new_std_menu_items(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 485                                      V4L2_CID_TEST_PATTERN,
 486                                      ARRAY_SIZE(afe_ctrl_frp_menu) - 1,
 487                                      0, 0, afe_ctrl_frp_menu);
 488
 489         afe->sd.ctrl_handler = &afe->ctrl_hdl;
 490         if (afe->ctrl_hdl.error) {
 491                 v4l2_ctrl_handler_free(&afe->ctrl_hdl);
 492                 return afe->ctrl_hdl.error;
 493         }
 494
 495         return v4l2_ctrl_handler_setup(&afe->ctrl_hdl);
 496 }
 497
 498 int adv748x_afe_init(struct adv748x_afe *afe)
 499 {
 500         struct adv748x_state *state = adv748x_afe_to_state(afe);
 501         int ret;
 502         unsigned int i;
 503
 504         afe->input = 0;
 505         afe->streaming = false;
 506         afe->curr_norm = V4L2_STD_NTSC_M;
 507
 508         adv748x_subdev_init(&afe->sd, state, &adv748x_afe_ops,
 509                             MEDIA_ENT_F_ATV_DECODER, "afe");
 510
 511         /* Identify the first connector found as a default input if set */
 512         for (i = ADV748X_PORT_AIN0; i <= ADV748X_PORT_AIN7; i++) {
 513                 /* Inputs and ports are 1-indexed to match the data sheet */
 514                 if (state->endpoints[i]) {
 515                         afe->input = i;
 516                         break;
 517                 }
 518         }
 519
 520         adv748x_afe_s_input(afe, afe->input);
 521
 522         adv_dbg(state, "AFE Default input set to %d\n", afe->input);
 523
 524         /* Entity pads and sinks are 0-indexed to match the pads */
 525         for (i = ADV748X_AFE_SINK_AIN0; i <= ADV748X_AFE_SINK_AIN7; i++)
 526                 afe->pads[i].flags = MEDIA_PAD_FL_SINK;
 527
 528         afe->pads[ADV748X_AFE_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
 529
 530         ret = media_entity_pads_init(&afe->sd.entity, ADV748X_AFE_NR_PADS,
 531                         afe->pads);
 532         if (ret)
 533                 return ret;
 534
 535         ret = adv748x_afe_init_controls(afe);
 536         if (ret)
 537                 goto error;
 538
 539         return 0;
 540
 541 error:
 542         media_entity_cleanup(&afe->sd.entity);
 543
 544         return ret;
 545 }
 546
 547 void adv748x_afe_cleanup(struct adv748x_afe *afe)
 548 {
 549         v4l2_device_unregister_subdev(&afe->sd);
 550         media_entity_cleanup(&afe->sd.entity);
 551         v4l2_ctrl_handler_free(&afe->ctrl_hdl);
 552 }