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 afe_std;
 221         int ret;
 222
 223         mutex_lock(&state->mutex);
 224
 225         if (afe->streaming) {
 226                 ret = -EBUSY;
 227                 goto unlock;
 228         }
 229
 230         /* Set auto detect mode */
 231         adv748x_afe_set_video_standard(state,
 232                                        ADV748X_AFE_STD_AD_PAL_BG_NTSC_J_SECAM);
 233
 234         msleep(100);
 235
 236         /* Read detected standard */
 237         ret = adv748x_afe_status(afe, NULL, std);
 238
 239         afe_std = adv748x_afe_std(afe->curr_norm);
 240         if (afe_std < 0)
 241                 goto unlock;
 242
 243         /* Restore original state */
 244         adv748x_afe_set_video_standard(state, afe_std);
 245
 246 unlock:
 247         mutex_unlock(&state->mutex);
 248
 249         return ret;
 250 }
 251
 252 static int adv748x_afe_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
 253 {
 254         *norm = V4L2_STD_ALL;
 255
 256         return 0;
 257 }
 258
 259 static int adv748x_afe_g_input_status(struct v4l2_subdev *sd, u32 *status)
 260 {
 261         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 262         struct adv748x_state *state = adv748x_afe_to_state(afe);
 263         int ret;
 264
 265         mutex_lock(&state->mutex);
 266
 267         ret = adv748x_afe_status(afe, status, NULL);
 268
 269         mutex_unlock(&state->mutex);
 270
 271         return ret;
 272 }
 273
 274 static int adv748x_afe_s_stream(struct v4l2_subdev *sd, int enable)
 275 {
 276         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 277         struct adv748x_state *state = adv748x_afe_to_state(afe);
 278         u32 signal = V4L2_IN_ST_NO_SIGNAL;
 279         int ret;
 280
 281         mutex_lock(&state->mutex);
 282
 283         if (enable) {
 284                 ret = adv748x_afe_s_input(afe, afe->input);
 285                 if (ret)
 286                         goto unlock;
 287         }
 288
 289         ret = adv748x_txb_power(state, enable);
 290         if (ret)
 291                 goto unlock;
 292
 293         afe->streaming = enable;
 294
 295         adv748x_afe_status(afe, &signal, NULL);
 296         if (signal != V4L2_IN_ST_NO_SIGNAL)
 297                 adv_dbg(state, "Detected SDP signal\n");
 298         else
 299                 adv_dbg(state, "Couldn't detect SDP video signal\n");
 300
 301 unlock:
 302         mutex_unlock(&state->mutex);
 303
 304         return ret;
 305 }
 306
 307 static const struct v4l2_subdev_video_ops adv748x_afe_video_ops = {
 308         .g_std = adv748x_afe_g_std,
 309         .s_std = adv748x_afe_s_std,
 310         .querystd = adv748x_afe_querystd,
 311         .g_tvnorms = adv748x_afe_g_tvnorms,
 312         .g_input_status = adv748x_afe_g_input_status,
 313         .s_stream = adv748x_afe_s_stream,
 314         .g_pixelaspect = adv748x_afe_g_pixelaspect,
 315 };
 316
 317 /* -----------------------------------------------------------------------------
 318  * v4l2_subdev_pad_ops
 319  */
 320
 321 static int adv748x_afe_propagate_pixelrate(struct adv748x_afe *afe)
 322 {
 323         struct v4l2_subdev *tx;
 324
 325         tx = adv748x_get_remote_sd(&afe->pads[ADV748X_AFE_SOURCE]);
 326         if (!tx)
 327                 return -ENOLINK;
 328
 329         /*
 330          * The ADV748x ADC sampling frequency is twice the externally supplied
 331          * clock whose frequency is required to be 28.63636 MHz. It oversamples
 332          * with a factor of 4 resulting in a pixel rate of 14.3180180 MHz.
 333          */
 334         return adv748x_csi2_set_pixelrate(tx, 14318180);
 335 }
 336
 337 static int adv748x_afe_enum_mbus_code(struct v4l2_subdev *sd,
 338                                       struct v4l2_subdev_pad_config *cfg,
 339                                       struct v4l2_subdev_mbus_code_enum *code)
 340 {
 341         if (code->index != 0)
 342                 return -EINVAL;
 343
 344         code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 345
 346         return 0;
 347 }
 348
 349 static int adv748x_afe_get_format(struct v4l2_subdev *sd,
 350                                       struct v4l2_subdev_pad_config *cfg,
 351                                       struct v4l2_subdev_format *sdformat)
 352 {
 353         struct adv748x_afe *afe = adv748x_sd_to_afe(sd);
 354         struct v4l2_mbus_framefmt *mbusformat;
 355
 356         /* It makes no sense to get the format of the analog sink pads */
 357         if (sdformat->pad != ADV748X_AFE_SOURCE)
 358                 return -EINVAL;
 359
 360         if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY) {
 361                 mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
 362                 sdformat->format = *mbusformat;
 363         } else {
 364                 adv748x_afe_fill_format(afe, &sdformat->format);
 365                 adv748x_afe_propagate_pixelrate(afe);
 366         }
 367
 368         return 0;
 369 }
 370
 371 static int adv748x_afe_set_format(struct v4l2_subdev *sd,
 372                                       struct v4l2_subdev_pad_config *cfg,
 373                                       struct v4l2_subdev_format *sdformat)
 374 {
 375         struct v4l2_mbus_framefmt *mbusformat;
 376
 377         /* It makes no sense to get the format of the analog sink pads */
 378         if (sdformat->pad != ADV748X_AFE_SOURCE)
 379                 return -EINVAL;
 380
 381         if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 382                 return adv748x_afe_get_format(sd, cfg, sdformat);
 383
 384         mbusformat = v4l2_subdev_get_try_format(sd, cfg, sdformat->pad);
 385         *mbusformat = sdformat->format;
 386
 387         return 0;
 388 }
 389
 390 static const struct v4l2_subdev_pad_ops adv748x_afe_pad_ops = {
 391         .enum_mbus_code = adv748x_afe_enum_mbus_code,
 392         .set_fmt = adv748x_afe_set_format,
 393         .get_fmt = adv748x_afe_get_format,
 394 };
 395
 396 /* -----------------------------------------------------------------------------
 397  * v4l2_subdev_ops
 398  */
 399
 400 static const struct v4l2_subdev_ops adv748x_afe_ops = {
 401         .video = &adv748x_afe_video_ops,
 402         .pad = &adv748x_afe_pad_ops,
 403 };
 404
 405 /* -----------------------------------------------------------------------------
 406  * Controls
 407  */
 408
 409 static const char * const afe_ctrl_frp_menu[] = {
 410         "Disabled",
 411         "Solid Blue",
 412         "Color Bars",
 413         "Grey Ramp",
 414         "Cb Ramp",
 415         "Cr Ramp",
 416         "Boundary"
 417 };
 418
 419 static int adv748x_afe_s_ctrl(struct v4l2_ctrl *ctrl)
 420 {
 421         struct adv748x_afe *afe = adv748x_ctrl_to_afe(ctrl);
 422         struct adv748x_state *state = adv748x_afe_to_state(afe);
 423         bool enable;
 424         int ret;
 425
 426         ret = sdp_write(state, 0x0e, 0x00);
 427         if (ret < 0)
 428                 return ret;
 429
 430         switch (ctrl->id) {
 431         case V4L2_CID_BRIGHTNESS:
 432                 ret = sdp_write(state, ADV748X_SDP_BRI, ctrl->val);
 433                 break;
 434         case V4L2_CID_HUE:
 435                 /* Hue is inverted according to HSL chart */
 436                 ret = sdp_write(state, ADV748X_SDP_HUE, -ctrl->val);
 437                 break;
 438         case V4L2_CID_CONTRAST:
 439                 ret = sdp_write(state, ADV748X_SDP_CON, ctrl->val);
 440                 break;
 441         case V4L2_CID_SATURATION:
 442                 ret = sdp_write(state, ADV748X_SDP_SD_SAT_U, ctrl->val);
 443                 if (ret)
 444                         break;
 445                 ret = sdp_write(state, ADV748X_SDP_SD_SAT_V, ctrl->val);
 446                 break;
 447         case V4L2_CID_TEST_PATTERN:
 448                 enable = !!ctrl->val;
 449
 450                 /* Enable/Disable Color bar test patterns */
 451                 ret = sdp_clrset(state, ADV748X_SDP_DEF, ADV748X_SDP_DEF_VAL_EN,
 452                                 enable);
 453                 if (ret)
 454                         break;
 455                 ret = sdp_clrset(state, ADV748X_SDP_FRP, ADV748X_SDP_FRP_MASK,
 456                                 enable ? ctrl->val - 1 : 0);
 457                 break;
 458         default:
 459                 return -EINVAL;
 460         }
 461
 462         return ret;
 463 }
 464
 465 static const struct v4l2_ctrl_ops adv748x_afe_ctrl_ops = {
 466         .s_ctrl = adv748x_afe_s_ctrl,
 467 };
 468
 469 static int adv748x_afe_init_controls(struct adv748x_afe *afe)
 470 {
 471         struct adv748x_state *state = adv748x_afe_to_state(afe);
 472
 473         v4l2_ctrl_handler_init(&afe->ctrl_hdl, 5);
 474
 475         /* Use our mutex for the controls */
 476         afe->ctrl_hdl.lock = &state->mutex;
 477
 478         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 479                           V4L2_CID_BRIGHTNESS, ADV748X_SDP_BRI_MIN,
 480                           ADV748X_SDP_BRI_MAX, 1, ADV748X_SDP_BRI_DEF);
 481         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 482                           V4L2_CID_CONTRAST, ADV748X_SDP_CON_MIN,
 483                           ADV748X_SDP_CON_MAX, 1, ADV748X_SDP_CON_DEF);
 484         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 485                           V4L2_CID_SATURATION, ADV748X_SDP_SAT_MIN,
 486                           ADV748X_SDP_SAT_MAX, 1, ADV748X_SDP_SAT_DEF);
 487         v4l2_ctrl_new_std(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 488                           V4L2_CID_HUE, ADV748X_SDP_HUE_MIN,
 489                           ADV748X_SDP_HUE_MAX, 1, ADV748X_SDP_HUE_DEF);
 490
 491         v4l2_ctrl_new_std_menu_items(&afe->ctrl_hdl, &adv748x_afe_ctrl_ops,
 492                                      V4L2_CID_TEST_PATTERN,
 493                                      ARRAY_SIZE(afe_ctrl_frp_menu) - 1,
 494                                      0, 0, afe_ctrl_frp_menu);
 495
 496         afe->sd.ctrl_handler = &afe->ctrl_hdl;
 497         if (afe->ctrl_hdl.error) {
 498                 v4l2_ctrl_handler_free(&afe->ctrl_hdl);
 499                 return afe->ctrl_hdl.error;
 500         }
 501
 502         return v4l2_ctrl_handler_setup(&afe->ctrl_hdl);
 503 }
 504
 505 int adv748x_afe_init(struct adv748x_afe *afe)
 506 {
 507         struct adv748x_state *state = adv748x_afe_to_state(afe);
 508         int ret;
 509         unsigned int i;
 510
 511         afe->input = 0;
 512         afe->streaming = false;
 513         afe->curr_norm = V4L2_STD_NTSC_M;
 514
 515         adv748x_subdev_init(&afe->sd, state, &adv748x_afe_ops,
 516                             MEDIA_ENT_F_ATV_DECODER, "afe");
 517
 518         /* Identify the first connector found as a default input if set */
 519         for (i = ADV748X_PORT_AIN0; i <= ADV748X_PORT_AIN7; i++) {
 520                 /* Inputs and ports are 1-indexed to match the data sheet */
 521                 if (state->endpoints[i]) {
 522                         afe->input = i;
 523                         break;
 524                 }
 525         }
 526
 527         adv748x_afe_s_input(afe, afe->input);
 528
 529         adv_dbg(state, "AFE Default input set to %d\n", afe->input);
 530
 531         /* Entity pads and sinks are 0-indexed to match the pads */
 532         for (i = ADV748X_AFE_SINK_AIN0; i <= ADV748X_AFE_SINK_AIN7; i++)
 533                 afe->pads[i].flags = MEDIA_PAD_FL_SINK;
 534
 535         afe->pads[ADV748X_AFE_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
 536
 537         ret = media_entity_pads_init(&afe->sd.entity, ADV748X_AFE_NR_PADS,
 538                         afe->pads);
 539         if (ret)
 540                 return ret;
 541
 542         ret = adv748x_afe_init_controls(afe);
 543         if (ret)
 544                 goto error;
 545
 546         return 0;
 547
 548 error:
 549         media_entity_cleanup(&afe->sd.entity);
 550
 551         return ret;
 552 }
 553
 554 void adv748x_afe_cleanup(struct adv748x_afe *afe)
 555 {
 556         v4l2_device_unregister_subdev(&afe->sd);
 557         media_entity_cleanup(&afe->sd.entity);
 558         v4l2_ctrl_handler_free(&afe->ctrl_hdl);
 559 }