drivers/media/platform/vimc/vimc-sensor.c

   1 /*
   2  * vimc-sensor.c Virtual Media Controller Driver
   3  *
   4  * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <linux/component.h>
  19 #include <linux/module.h>
  20 #include <linux/mod_devicetable.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/v4l2-mediabus.h>
  23 #include <linux/vmalloc.h>
  24 #include <media/v4l2-ctrls.h>
  25 #include <media/v4l2-event.h>
  26 #include <media/v4l2-subdev.h>
  27 #include <media/tpg/v4l2-tpg.h>
  28
  29 #include "vimc-common.h"
  30
  31 #define VIMC_SEN_DRV_NAME "vimc-sensor"
  32
  33 struct vimc_sen_device {
  34         struct vimc_ent_device ved;
  35         struct v4l2_subdev sd;
  36         struct device *dev;
  37         struct tpg_data tpg;
  38         struct task_struct *kthread_sen;
  39         u8 *frame;
  40         /* The active format */
  41         struct v4l2_mbus_framefmt mbus_format;
  42         struct v4l2_ctrl_handler hdl;
  43 };
  44
  45 static const struct v4l2_mbus_framefmt fmt_default = {
  46         .width = 640,
  47         .height = 480,
  48         .code = MEDIA_BUS_FMT_RGB888_1X24,
  49         .field = V4L2_FIELD_NONE,
  50         .colorspace = V4L2_COLORSPACE_DEFAULT,
  51 };
  52
  53 static int vimc_sen_init_cfg(struct v4l2_subdev *sd,
  54                              struct v4l2_subdev_pad_config *cfg)
  55 {
  56         unsigned int i;
  57
  58         for (i = 0; i < sd->entity.num_pads; i++) {
  59                 struct v4l2_mbus_framefmt *mf;
  60
  61                 mf = v4l2_subdev_get_try_format(sd, cfg, i);
  62                 *mf = fmt_default;
  63         }
  64
  65         return 0;
  66 }
  67
  68 static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd,
  69                                     struct v4l2_subdev_pad_config *cfg,
  70                                     struct v4l2_subdev_frame_size_enum *fse)
  71 {
  72         if (fse->index)
  73                 return -EINVAL;
  74
  75         fse->min_width = VIMC_FRAME_MIN_WIDTH;
  76         fse->max_width = VIMC_FRAME_MAX_WIDTH;
  77         fse->min_height = VIMC_FRAME_MIN_HEIGHT;
  78         fse->max_height = VIMC_FRAME_MAX_HEIGHT;
  79
  80         return 0;
  81 }
  82
  83 static int vimc_sen_get_fmt(struct v4l2_subdev *sd,
  84                             struct v4l2_subdev_pad_config *cfg,
  85                             struct v4l2_subdev_format *fmt)
  86 {
  87         struct vimc_sen_device *vsen =
  88                                 container_of(sd, struct vimc_sen_device, sd);
  89
  90         fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
  91                       *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
  92                       vsen->mbus_format;
  93
  94         return 0;
  95 }
  96
  97 static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
  98 {
  99         u32 pixelformat = vsen->ved.stream->producer_pixfmt;
 100         const struct v4l2_format_info *pix_info;
 101
 102         pix_info = v4l2_format_info(pixelformat);
 103
 104         tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
 105                          vsen->mbus_format.height, vsen->mbus_format.field);
 106         tpg_s_bytesperline(&vsen->tpg, 0,
 107                            vsen->mbus_format.width * pix_info->bpp[0]);
 108         tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
 109         tpg_s_fourcc(&vsen->tpg, pixelformat);
 110         /* TODO: add support for V4L2_FIELD_ALTERNATE */
 111         tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
 112         tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
 113         tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
 114         tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
 115         tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
 116 }
 117
 118 static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
 119 {
 120         fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
 121                              VIMC_FRAME_MAX_WIDTH) & ~1;
 122         fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
 123                               VIMC_FRAME_MAX_HEIGHT) & ~1;
 124
 125         /* TODO: add support for V4L2_FIELD_ALTERNATE */
 126         if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
 127                 fmt->field = fmt_default.field;
 128
 129         vimc_colorimetry_clamp(fmt);
 130 }
 131
 132 static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
 133                             struct v4l2_subdev_pad_config *cfg,
 134                             struct v4l2_subdev_format *fmt)
 135 {
 136         struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
 137         struct v4l2_mbus_framefmt *mf;
 138
 139         if (!vimc_mbus_code_supported(fmt->format.code))
 140                 fmt->format.code = fmt_default.code;
 141
 142         if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
 143                 /* Do not change the format while stream is on */
 144                 if (vsen->frame)
 145                         return -EBUSY;
 146
 147                 mf = &vsen->mbus_format;
 148         } else {
 149                 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
 150         }
 151
 152         /* Set the new format */
 153         vimc_sen_adjust_fmt(&fmt->format);
 154
 155         dev_dbg(vsen->dev, "%s: format update: "
 156                 "old:%dx%d (0x%x, %d, %d, %d, %d) "
 157                 "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
 158                 /* old */
 159                 mf->width, mf->height, mf->code,
 160                 mf->colorspace, mf->quantization,
 161                 mf->xfer_func, mf->ycbcr_enc,
 162                 /* new */
 163                 fmt->format.width, fmt->format.height, fmt->format.code,
 164                 fmt->format.colorspace, fmt->format.quantization,
 165                 fmt->format.xfer_func, fmt->format.ycbcr_enc);
 166
 167         *mf = fmt->format;
 168
 169         return 0;
 170 }
 171
 172 static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
 173         .init_cfg               = vimc_sen_init_cfg,
 174         .enum_mbus_code         = vimc_enum_mbus_code,
 175         .enum_frame_size        = vimc_sen_enum_frame_size,
 176         .get_fmt                = vimc_sen_get_fmt,
 177         .set_fmt                = vimc_sen_set_fmt,
 178 };
 179
 180 static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
 181                                     const void *sink_frame)
 182 {
 183         struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
 184                                                     ved);
 185
 186         tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
 187         return vsen->frame;
 188 }
 189
 190 static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
 191 {
 192         struct vimc_sen_device *vsen =
 193                                 container_of(sd, struct vimc_sen_device, sd);
 194
 195         if (enable) {
 196                 u32 pixelformat = vsen->ved.stream->producer_pixfmt;
 197                 const struct v4l2_format_info *pix_info;
 198                 unsigned int frame_size;
 199
 200                 if (vsen->kthread_sen)
 201                         /* tpg is already executing */
 202                         return 0;
 203
 204                 /* Calculate the frame size */
 205                 pix_info = v4l2_format_info(pixelformat);
 206                 frame_size = vsen->mbus_format.width * pix_info->bpp[0] *
 207                              vsen->mbus_format.height;
 208
 209                 /*
 210                  * Allocate the frame buffer. Use vmalloc to be able to
 211                  * allocate a large amount of memory
 212                  */
 213                 vsen->frame = vmalloc(frame_size);
 214                 if (!vsen->frame)
 215                         return -ENOMEM;
 216
 217                 /* configure the test pattern generator */
 218                 vimc_sen_tpg_s_format(vsen);
 219
 220         } else {
 221
 222                 vfree(vsen->frame);
 223                 vsen->frame = NULL;
 224                 return 0;
 225         }
 226
 227         return 0;
 228 }
 229
 230 static const struct v4l2_subdev_core_ops vimc_sen_core_ops = {
 231         .log_status = v4l2_ctrl_subdev_log_status,
 232         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
 233         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
 234 };
 235
 236 static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
 237         .s_stream = vimc_sen_s_stream,
 238 };
 239
 240 static const struct v4l2_subdev_ops vimc_sen_ops = {
 241         .core = &vimc_sen_core_ops,
 242         .pad = &vimc_sen_pad_ops,
 243         .video = &vimc_sen_video_ops,
 244 };
 245
 246 static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
 247 {
 248         struct vimc_sen_device *vsen =
 249                 container_of(ctrl->handler, struct vimc_sen_device, hdl);
 250
 251         switch (ctrl->id) {
 252         case VIMC_CID_TEST_PATTERN:
 253                 tpg_s_pattern(&vsen->tpg, ctrl->val);
 254                 break;
 255         case V4L2_CID_HFLIP:
 256                 tpg_s_hflip(&vsen->tpg, ctrl->val);
 257                 break;
 258         case V4L2_CID_VFLIP:
 259                 tpg_s_vflip(&vsen->tpg, ctrl->val);
 260                 break;
 261         case V4L2_CID_BRIGHTNESS:
 262                 tpg_s_brightness(&vsen->tpg, ctrl->val);
 263                 break;
 264         case V4L2_CID_CONTRAST:
 265                 tpg_s_contrast(&vsen->tpg, ctrl->val);
 266                 break;
 267         case V4L2_CID_HUE:
 268                 tpg_s_hue(&vsen->tpg, ctrl->val);
 269                 break;
 270         case V4L2_CID_SATURATION:
 271                 tpg_s_saturation(&vsen->tpg, ctrl->val);
 272                 break;
 273         default:
 274                 return -EINVAL;
 275         }
 276         return 0;
 277 }
 278
 279 static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = {
 280         .s_ctrl = vimc_sen_s_ctrl,
 281 };
 282
 283 static void vimc_sen_release(struct v4l2_subdev *sd)
 284 {
 285         struct vimc_sen_device *vsen =
 286                                 container_of(sd, struct vimc_sen_device, sd);
 287
 288         v4l2_ctrl_handler_free(&vsen->hdl);
 289         tpg_free(&vsen->tpg);
 290         kfree(vsen);
 291 }
 292
 293 static const struct v4l2_subdev_internal_ops vimc_sen_int_ops = {
 294         .release = vimc_sen_release,
 295 };
 296
 297 static void vimc_sen_comp_unbind(struct device *comp, struct device *master,
 298                                  void *master_data)
 299 {
 300         struct vimc_ent_device *ved = dev_get_drvdata(comp);
 301         struct vimc_sen_device *vsen =
 302                                 container_of(ved, struct vimc_sen_device, ved);
 303
 304         vimc_ent_sd_unregister(ved, &vsen->sd);
 305 }
 306
 307 /* Image Processing Controls */
 308 static const struct v4l2_ctrl_config vimc_sen_ctrl_class = {
 309         .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
 310         .id = VIMC_CID_VIMC_CLASS,
 311         .name = "VIMC Controls",
 312         .type = V4L2_CTRL_TYPE_CTRL_CLASS,
 313 };
 314
 315 static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
 316         .ops = &vimc_sen_ctrl_ops,
 317         .id = VIMC_CID_TEST_PATTERN,
 318         .name = "Test Pattern",
 319         .type = V4L2_CTRL_TYPE_MENU,
 320         .max = TPG_PAT_NOISE,
 321         .qmenu = tpg_pattern_strings,
 322 };
 323
 324 static int vimc_sen_comp_bind(struct device *comp, struct device *master,
 325                               void *master_data)
 326 {
 327         struct v4l2_device *v4l2_dev = master_data;
 328         struct vimc_platform_data *pdata = comp->platform_data;
 329         struct vimc_sen_device *vsen;
 330         int ret;
 331
 332         /* Allocate the vsen struct */
 333         vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
 334         if (!vsen)
 335                 return -ENOMEM;
 336
 337         v4l2_ctrl_handler_init(&vsen->hdl, 4);
 338
 339         v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
 340         v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
 341         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 342                           V4L2_CID_VFLIP, 0, 1, 1, 0);
 343         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 344                           V4L2_CID_HFLIP, 0, 1, 1, 0);
 345         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 346                           V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 347         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 348                           V4L2_CID_CONTRAST, 0, 255, 1, 128);
 349         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 350                           V4L2_CID_HUE, -128, 127, 1, 0);
 351         v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
 352                           V4L2_CID_SATURATION, 0, 255, 1, 128);
 353         vsen->sd.ctrl_handler = &vsen->hdl;
 354         if (vsen->hdl.error) {
 355                 ret = vsen->hdl.error;
 356                 goto err_free_vsen;
 357         }
 358
 359         /* Initialize ved and sd */
 360         ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
 361                                    pdata->entity_name,
 362                                    MEDIA_ENT_F_CAM_SENSOR, 1,
 363                                    (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
 364                                    &vimc_sen_int_ops, &vimc_sen_ops);
 365         if (ret)
 366                 goto err_free_hdl;
 367
 368         vsen->ved.process_frame = vimc_sen_process_frame;
 369         dev_set_drvdata(comp, &vsen->ved);
 370         vsen->dev = comp;
 371
 372         /* Initialize the frame format */
 373         vsen->mbus_format = fmt_default;
 374
 375         /* Initialize the test pattern generator */
 376         tpg_init(&vsen->tpg, vsen->mbus_format.width,
 377                  vsen->mbus_format.height);
 378         ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
 379         if (ret)
 380                 goto err_unregister_ent_sd;
 381
 382         return 0;
 383
 384 err_unregister_ent_sd:
 385         vimc_ent_sd_unregister(&vsen->ved,  &vsen->sd);
 386 err_free_hdl:
 387         v4l2_ctrl_handler_free(&vsen->hdl);
 388 err_free_vsen:
 389         kfree(vsen);
 390
 391         return ret;
 392 }
 393
 394 static const struct component_ops vimc_sen_comp_ops = {
 395         .bind = vimc_sen_comp_bind,
 396         .unbind = vimc_sen_comp_unbind,
 397 };
 398
 399 static int vimc_sen_probe(struct platform_device *pdev)
 400 {
 401         return component_add(&pdev->dev, &vimc_sen_comp_ops);
 402 }
 403
 404 static int vimc_sen_remove(struct platform_device *pdev)
 405 {
 406         component_del(&pdev->dev, &vimc_sen_comp_ops);
 407
 408         return 0;
 409 }
 410
 411 static const struct platform_device_id vimc_sen_driver_ids[] = {
 412         {
 413                 .name           = VIMC_SEN_DRV_NAME,
 414         },
 415         { }
 416 };
 417
 418 static struct platform_driver vimc_sen_pdrv = {
 419         .probe          = vimc_sen_probe,
 420         .remove         = vimc_sen_remove,
 421         .id_table       = vimc_sen_driver_ids,
 422         .driver         = {
 423                 .name   = VIMC_SEN_DRV_NAME,
 424         },
 425 };
 426
 427 module_platform_driver(vimc_sen_pdrv);
 428
 429 MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids);
 430
 431 MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor");
 432 MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
 433 MODULE_LICENSE("GPL");