drivers/media/platform/blackfin/bfin_capture.c

   1 /*
   2  * Analog Devices video capture driver
   3  *
   4  * Copyright (c) 2011 Analog Devices Inc.
   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 version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/completion.h>
  21 #include <linux/delay.h>
  22 #include <linux/errno.h>
  23 #include <linux/fs.h>
  24 #include <linux/i2c.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/io.h>
  28 #include <linux/mm.h>
  29 #include <linux/module.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/slab.h>
  32 #include <linux/time.h>
  33 #include <linux/types.h>
  34
  35 #include <media/v4l2-common.h>
  36 #include <media/v4l2-ctrls.h>
  37 #include <media/v4l2-device.h>
  38 #include <media/v4l2-ioctl.h>
  39 #include <media/videobuf2-dma-contig.h>
  40
  41 #include <asm/dma.h>
  42
  43 #include <media/blackfin/bfin_capture.h>
  44 #include <media/blackfin/ppi.h>
  45
  46 #define CAPTURE_DRV_NAME        "bfin_capture"
  47
  48 struct bcap_format {
  49         char *desc;
  50         u32 pixelformat;
  51         u32 mbus_code;
  52         int bpp; /* bits per pixel */
  53         int dlen; /* data length for ppi in bits */
  54 };
  55
  56 struct bcap_buffer {
  57         struct vb2_v4l2_buffer vb;
  58         struct list_head list;
  59 };
  60
  61 struct bcap_device {
  62         /* capture device instance */
  63         struct v4l2_device v4l2_dev;
  64         /* v4l2 control handler */
  65         struct v4l2_ctrl_handler ctrl_handler;
  66         /* device node data */
  67         struct video_device video_dev;
  68         /* sub device instance */
  69         struct v4l2_subdev *sd;
  70         /* capture config */
  71         struct bfin_capture_config *cfg;
  72         /* ppi interface */
  73         struct ppi_if *ppi;
  74         /* current input */
  75         unsigned int cur_input;
  76         /* current selected standard */
  77         v4l2_std_id std;
  78         /* current selected dv_timings */
  79         struct v4l2_dv_timings dv_timings;
  80         /* used to store pixel format */
  81         struct v4l2_pix_format fmt;
  82         /* bits per pixel*/
  83         int bpp;
  84         /* data length for ppi in bits */
  85         int dlen;
  86         /* used to store sensor supported format */
  87         struct bcap_format *sensor_formats;
  88         /* number of sensor formats array */
  89         int num_sensor_formats;
  90         /* pointing to current video buffer */
  91         struct bcap_buffer *cur_frm;
  92         /* buffer queue used in videobuf2 */
  93         struct vb2_queue buffer_queue;
  94         /* allocator-specific contexts for each plane */
  95         struct vb2_alloc_ctx *alloc_ctx;
  96         /* queue of filled frames */
  97         struct list_head dma_queue;
  98         /* used in videobuf2 callback */
  99         spinlock_t lock;
 100         /* used to access capture device */
 101         struct mutex mutex;
 102         /* used to wait ppi to complete one transfer */
 103         struct completion comp;
 104         /* prepare to stop */
 105         bool stop;
 106         /* vb2 buffer sequence counter */
 107         unsigned sequence;
 108 };
 109
 110 static const struct bcap_format bcap_formats[] = {
 111         {
 112                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 113                 .pixelformat = V4L2_PIX_FMT_UYVY,
 114                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_2X8,
 115                 .bpp         = 16,
 116                 .dlen        = 8,
 117         },
 118         {
 119                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 120                 .pixelformat = V4L2_PIX_FMT_YUYV,
 121                 .mbus_code   = MEDIA_BUS_FMT_YUYV8_2X8,
 122                 .bpp         = 16,
 123                 .dlen        = 8,
 124         },
 125         {
 126                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 127                 .pixelformat = V4L2_PIX_FMT_UYVY,
 128                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_1X16,
 129                 .bpp         = 16,
 130                 .dlen        = 16,
 131         },
 132         {
 133                 .desc        = "RGB 565",
 134                 .pixelformat = V4L2_PIX_FMT_RGB565,
 135                 .mbus_code   = MEDIA_BUS_FMT_RGB565_2X8_LE,
 136                 .bpp         = 16,
 137                 .dlen        = 8,
 138         },
 139         {
 140                 .desc        = "RGB 444",
 141                 .pixelformat = V4L2_PIX_FMT_RGB444,
 142                 .mbus_code   = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
 143                 .bpp         = 16,
 144                 .dlen        = 8,
 145         },
 146
 147 };
 148 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 149
 150 static irqreturn_t bcap_isr(int irq, void *dev_id);
 151
 152 static struct bcap_buffer *to_bcap_vb(struct vb2_v4l2_buffer *vb)
 153 {
 154         return container_of(vb, struct bcap_buffer, vb);
 155 }
 156
 157 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 158 {
 159         struct v4l2_subdev_mbus_code_enum code = {
 160                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 161         };
 162         struct bcap_format *sf;
 163         unsigned int num_formats = 0;
 164         int i, j;
 165
 166         while (!v4l2_subdev_call(bcap_dev->sd, pad,
 167                                 enum_mbus_code, NULL, &code)) {
 168                 num_formats++;
 169                 code.index++;
 170         }
 171         if (!num_formats)
 172                 return -ENXIO;
 173
 174         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 175         if (!sf)
 176                 return -ENOMEM;
 177
 178         for (i = 0; i < num_formats; i++) {
 179                 code.index = i;
 180                 v4l2_subdev_call(bcap_dev->sd, pad,
 181                                 enum_mbus_code, NULL, &code);
 182                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 183                         if (code.code == bcap_formats[j].mbus_code)
 184                                 break;
 185                 if (j == BCAP_MAX_FMTS) {
 186                         /* we don't allow this sensor working with our bridge */
 187                         kfree(sf);
 188                         return -EINVAL;
 189                 }
 190                 sf[i] = bcap_formats[j];
 191         }
 192         bcap_dev->sensor_formats = sf;
 193         bcap_dev->num_sensor_formats = num_formats;
 194         return 0;
 195 }
 196
 197 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
 198 {
 199         bcap_dev->num_sensor_formats = 0;
 200         kfree(bcap_dev->sensor_formats);
 201         bcap_dev->sensor_formats = NULL;
 202 }
 203
 204 static int bcap_queue_setup(struct vb2_queue *vq,
 205                                 const void *parg,
 206                                 unsigned int *nbuffers, unsigned int *nplanes,
 207                                 unsigned int sizes[], void *alloc_ctxs[])
 208 {
 209         const struct v4l2_format *fmt = parg;
 210         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 211
 212         if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
 213                 return -EINVAL;
 214
 215         if (vq->num_buffers + *nbuffers < 2)
 216                 *nbuffers = 2;
 217
 218         *nplanes = 1;
 219         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
 220         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 221
 222         return 0;
 223 }
 224
 225 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 226 {
 227         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 228         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 229         unsigned long size = bcap_dev->fmt.sizeimage;
 230
 231         if (vb2_plane_size(vb, 0) < size) {
 232                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 233                                 vb2_plane_size(vb, 0), size);
 234                 return -EINVAL;
 235         }
 236         vb2_set_plane_payload(vb, 0, size);
 237
 238         vbuf->field = bcap_dev->fmt.field;
 239
 240         return 0;
 241 }
 242
 243 static void bcap_buffer_queue(struct vb2_buffer *vb)
 244 {
 245         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 246         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 247         struct bcap_buffer *buf = to_bcap_vb(vbuf);
 248         unsigned long flags;
 249
 250         spin_lock_irqsave(&bcap_dev->lock, flags);
 251         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 252         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 253 }
 254
 255 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 256 {
 257         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 258         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 259         struct bcap_buffer *buf = to_bcap_vb(vbuf);
 260         unsigned long flags;
 261
 262         spin_lock_irqsave(&bcap_dev->lock, flags);
 263         list_del_init(&buf->list);
 264         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 265 }
 266
 267 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 268 {
 269         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 270         struct ppi_if *ppi = bcap_dev->ppi;
 271         struct bcap_buffer *buf, *tmp;
 272         struct ppi_params params;
 273         dma_addr_t addr;
 274         int ret;
 275
 276         /* enable streamon on the sub device */
 277         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 278         if (ret && (ret != -ENOIOCTLCMD)) {
 279                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 280                 goto err;
 281         }
 282
 283         /* set ppi params */
 284         params.width = bcap_dev->fmt.width;
 285         params.height = bcap_dev->fmt.height;
 286         params.bpp = bcap_dev->bpp;
 287         params.dlen = bcap_dev->dlen;
 288         params.ppi_control = bcap_dev->cfg->ppi_control;
 289         params.int_mask = bcap_dev->cfg->int_mask;
 290         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 291                         & V4L2_IN_CAP_DV_TIMINGS) {
 292                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 293
 294                 params.hdelay = bt->hsync + bt->hbackporch;
 295                 params.vdelay = bt->vsync + bt->vbackporch;
 296                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
 297                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
 298         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 299                         & V4L2_IN_CAP_STD) {
 300                 params.hdelay = 0;
 301                 params.vdelay = 0;
 302                 if (bcap_dev->std & V4L2_STD_525_60) {
 303                         params.line = 858;
 304                         params.frame = 525;
 305                 } else {
 306                         params.line = 864;
 307                         params.frame = 625;
 308                 }
 309         } else {
 310                 params.hdelay = 0;
 311                 params.vdelay = 0;
 312                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 313                 params.frame = params.height;
 314         }
 315         ret = ppi->ops->set_params(ppi, &params);
 316         if (ret < 0) {
 317                 v4l2_err(&bcap_dev->v4l2_dev,
 318                                 "Error in setting ppi params\n");
 319                 goto err;
 320         }
 321
 322         /* attach ppi DMA irq handler */
 323         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 324         if (ret < 0) {
 325                 v4l2_err(&bcap_dev->v4l2_dev,
 326                                 "Error in attaching interrupt handler\n");
 327                 goto err;
 328         }
 329
 330         bcap_dev->sequence = 0;
 331
 332         reinit_completion(&bcap_dev->comp);
 333         bcap_dev->stop = false;
 334
 335         /* get the next frame from the dma queue */
 336         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 337                                         struct bcap_buffer, list);
 338         /* remove buffer from the dma queue */
 339         list_del_init(&bcap_dev->cur_frm->list);
 340         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb.vb2_buf,
 341                                                 0);
 342         /* update DMA address */
 343         ppi->ops->update_addr(ppi, (unsigned long)addr);
 344         /* enable ppi */
 345         ppi->ops->start(ppi);
 346
 347         return 0;
 348
 349 err:
 350         list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
 351                 list_del(&buf->list);
 352                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
 353         }
 354
 355         return ret;
 356 }
 357
 358 static void bcap_stop_streaming(struct vb2_queue *vq)
 359 {
 360         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 361         struct ppi_if *ppi = bcap_dev->ppi;
 362         int ret;
 363
 364         bcap_dev->stop = true;
 365         wait_for_completion(&bcap_dev->comp);
 366         ppi->ops->stop(ppi);
 367         ppi->ops->detach_irq(ppi);
 368         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 369         if (ret && (ret != -ENOIOCTLCMD))
 370                 v4l2_err(&bcap_dev->v4l2_dev,
 371                                 "stream off failed in subdev\n");
 372
 373         /* release all active buffers */
 374         if (bcap_dev->cur_frm)
 375                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
 376                                 VB2_BUF_STATE_ERROR);
 377
 378         while (!list_empty(&bcap_dev->dma_queue)) {
 379                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 380                                                 struct bcap_buffer, list);
 381                 list_del_init(&bcap_dev->cur_frm->list);
 382                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
 383                                 VB2_BUF_STATE_ERROR);
 384         }
 385 }
 386
 387 static struct vb2_ops bcap_video_qops = {
 388         .queue_setup            = bcap_queue_setup,
 389         .buf_prepare            = bcap_buffer_prepare,
 390         .buf_cleanup            = bcap_buffer_cleanup,
 391         .buf_queue              = bcap_buffer_queue,
 392         .wait_prepare           = vb2_ops_wait_prepare,
 393         .wait_finish            = vb2_ops_wait_finish,
 394         .start_streaming        = bcap_start_streaming,
 395         .stop_streaming         = bcap_stop_streaming,
 396 };
 397
 398 static irqreturn_t bcap_isr(int irq, void *dev_id)
 399 {
 400         struct ppi_if *ppi = dev_id;
 401         struct bcap_device *bcap_dev = ppi->priv;
 402         struct vb2_v4l2_buffer *vbuf = &bcap_dev->cur_frm->vb;
 403         struct vb2_buffer *vb = &vbuf->vb2_buf;
 404         dma_addr_t addr;
 405
 406         spin_lock(&bcap_dev->lock);
 407
 408         if (!list_empty(&bcap_dev->dma_queue)) {
 409                 v4l2_get_timestamp(&vbuf->timestamp);
 410                 if (ppi->err) {
 411                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 412                         ppi->err = false;
 413                 } else {
 414                         vbuf->sequence = bcap_dev->sequence++;
 415                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 416                 }
 417                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 418                                 struct bcap_buffer, list);
 419                 list_del_init(&bcap_dev->cur_frm->list);
 420         } else {
 421                 /* clear error flag, we will get a new frame */
 422                 if (ppi->err)
 423                         ppi->err = false;
 424         }
 425
 426         ppi->ops->stop(ppi);
 427
 428         if (bcap_dev->stop) {
 429                 complete(&bcap_dev->comp);
 430         } else {
 431                 addr = vb2_dma_contig_plane_dma_addr(
 432                                 &bcap_dev->cur_frm->vb.vb2_buf, 0);
 433                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 434                 ppi->ops->start(ppi);
 435         }
 436
 437         spin_unlock(&bcap_dev->lock);
 438
 439         return IRQ_HANDLED;
 440 }
 441
 442 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 443 {
 444         struct bcap_device *bcap_dev = video_drvdata(file);
 445         struct v4l2_input input;
 446
 447         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 448         if (!(input.capabilities & V4L2_IN_CAP_STD))
 449                 return -ENODATA;
 450
 451         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 452 }
 453
 454 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 455 {
 456         struct bcap_device *bcap_dev = video_drvdata(file);
 457         struct v4l2_input input;
 458
 459         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 460         if (!(input.capabilities & V4L2_IN_CAP_STD))
 461                 return -ENODATA;
 462
 463         *std = bcap_dev->std;
 464         return 0;
 465 }
 466
 467 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 468 {
 469         struct bcap_device *bcap_dev = video_drvdata(file);
 470         struct v4l2_input input;
 471         int ret;
 472
 473         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 474         if (!(input.capabilities & V4L2_IN_CAP_STD))
 475                 return -ENODATA;
 476
 477         if (vb2_is_busy(&bcap_dev->buffer_queue))
 478                 return -EBUSY;
 479
 480         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
 481         if (ret < 0)
 482                 return ret;
 483
 484         bcap_dev->std = std;
 485         return 0;
 486 }
 487
 488 static int bcap_enum_dv_timings(struct file *file, void *priv,
 489                                 struct v4l2_enum_dv_timings *timings)
 490 {
 491         struct bcap_device *bcap_dev = video_drvdata(file);
 492         struct v4l2_input input;
 493
 494         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 495         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 496                 return -ENODATA;
 497
 498         timings->pad = 0;
 499
 500         return v4l2_subdev_call(bcap_dev->sd, pad,
 501                         enum_dv_timings, timings);
 502 }
 503
 504 static int bcap_query_dv_timings(struct file *file, void *priv,
 505                                 struct v4l2_dv_timings *timings)
 506 {
 507         struct bcap_device *bcap_dev = video_drvdata(file);
 508         struct v4l2_input input;
 509
 510         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 511         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 512                 return -ENODATA;
 513
 514         return v4l2_subdev_call(bcap_dev->sd, video,
 515                                 query_dv_timings, timings);
 516 }
 517
 518 static int bcap_g_dv_timings(struct file *file, void *priv,
 519                                 struct v4l2_dv_timings *timings)
 520 {
 521         struct bcap_device *bcap_dev = video_drvdata(file);
 522         struct v4l2_input input;
 523
 524         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 525         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 526                 return -ENODATA;
 527
 528         *timings = bcap_dev->dv_timings;
 529         return 0;
 530 }
 531
 532 static int bcap_s_dv_timings(struct file *file, void *priv,
 533                                 struct v4l2_dv_timings *timings)
 534 {
 535         struct bcap_device *bcap_dev = video_drvdata(file);
 536         struct v4l2_input input;
 537         int ret;
 538
 539         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
 540         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
 541                 return -ENODATA;
 542
 543         if (vb2_is_busy(&bcap_dev->buffer_queue))
 544                 return -EBUSY;
 545
 546         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 547         if (ret < 0)
 548                 return ret;
 549
 550         bcap_dev->dv_timings = *timings;
 551         return 0;
 552 }
 553
 554 static int bcap_enum_input(struct file *file, void *priv,
 555                                 struct v4l2_input *input)
 556 {
 557         struct bcap_device *bcap_dev = video_drvdata(file);
 558         struct bfin_capture_config *config = bcap_dev->cfg;
 559         int ret;
 560         u32 status;
 561
 562         if (input->index >= config->num_inputs)
 563                 return -EINVAL;
 564
 565         *input = config->inputs[input->index];
 566         /* get input status */
 567         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 568         if (!ret)
 569                 input->status = status;
 570         return 0;
 571 }
 572
 573 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 574 {
 575         struct bcap_device *bcap_dev = video_drvdata(file);
 576
 577         *index = bcap_dev->cur_input;
 578         return 0;
 579 }
 580
 581 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 582 {
 583         struct bcap_device *bcap_dev = video_drvdata(file);
 584         struct bfin_capture_config *config = bcap_dev->cfg;
 585         struct bcap_route *route;
 586         int ret;
 587
 588         if (vb2_is_busy(&bcap_dev->buffer_queue))
 589                 return -EBUSY;
 590
 591         if (index >= config->num_inputs)
 592                 return -EINVAL;
 593
 594         route = &config->routes[index];
 595         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 596                                 route->input, route->output, 0);
 597         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 598                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 599                 return ret;
 600         }
 601         bcap_dev->cur_input = index;
 602         /* if this route has specific config, update ppi control */
 603         if (route->ppi_control)
 604                 config->ppi_control = route->ppi_control;
 605         return 0;
 606 }
 607
 608 static int bcap_try_format(struct bcap_device *bcap,
 609                                 struct v4l2_pix_format *pixfmt,
 610                                 struct bcap_format *bcap_fmt)
 611 {
 612         struct bcap_format *sf = bcap->sensor_formats;
 613         struct bcap_format *fmt = NULL;
 614         struct v4l2_subdev_pad_config pad_cfg;
 615         struct v4l2_subdev_format format = {
 616                 .which = V4L2_SUBDEV_FORMAT_TRY,
 617         };
 618         int ret, i;
 619
 620         for (i = 0; i < bcap->num_sensor_formats; i++) {
 621                 fmt = &sf[i];
 622                 if (pixfmt->pixelformat == fmt->pixelformat)
 623                         break;
 624         }
 625         if (i == bcap->num_sensor_formats)
 626                 fmt = &sf[0];
 627
 628         v4l2_fill_mbus_format(&format.format, pixfmt, fmt->mbus_code);
 629         ret = v4l2_subdev_call(bcap->sd, pad, set_fmt, &pad_cfg,
 630                                 &format);
 631         if (ret < 0)
 632                 return ret;
 633         v4l2_fill_pix_format(pixfmt, &format.format);
 634         if (bcap_fmt) {
 635                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 636                         fmt = &sf[i];
 637                         if (format.format.code == fmt->mbus_code)
 638                                 break;
 639                 }
 640                 *bcap_fmt = *fmt;
 641         }
 642         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 643         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 644         return 0;
 645 }
 646
 647 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 648                                         struct v4l2_fmtdesc *fmt)
 649 {
 650         struct bcap_device *bcap_dev = video_drvdata(file);
 651         struct bcap_format *sf = bcap_dev->sensor_formats;
 652
 653         if (fmt->index >= bcap_dev->num_sensor_formats)
 654                 return -EINVAL;
 655
 656         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 657         strlcpy(fmt->description,
 658                 sf[fmt->index].desc,
 659                 sizeof(fmt->description));
 660         fmt->pixelformat = sf[fmt->index].pixelformat;
 661         return 0;
 662 }
 663
 664 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 665                                         struct v4l2_format *fmt)
 666 {
 667         struct bcap_device *bcap_dev = video_drvdata(file);
 668         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 669
 670         return bcap_try_format(bcap_dev, pixfmt, NULL);
 671 }
 672
 673 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 674                                 struct v4l2_format *fmt)
 675 {
 676         struct bcap_device *bcap_dev = video_drvdata(file);
 677
 678         fmt->fmt.pix = bcap_dev->fmt;
 679         return 0;
 680 }
 681
 682 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 683                                 struct v4l2_format *fmt)
 684 {
 685         struct bcap_device *bcap_dev = video_drvdata(file);
 686         struct v4l2_subdev_format format = {
 687                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 688         };
 689         struct bcap_format bcap_fmt;
 690         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 691         int ret;
 692
 693         if (vb2_is_busy(&bcap_dev->buffer_queue))
 694                 return -EBUSY;
 695
 696         /* see if format works */
 697         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 698         if (ret < 0)
 699                 return ret;
 700
 701         v4l2_fill_mbus_format(&format.format, pixfmt, bcap_fmt.mbus_code);
 702         ret = v4l2_subdev_call(bcap_dev->sd, pad, set_fmt, NULL, &format);
 703         if (ret < 0)
 704                 return ret;
 705         bcap_dev->fmt = *pixfmt;
 706         bcap_dev->bpp = bcap_fmt.bpp;
 707         bcap_dev->dlen = bcap_fmt.dlen;
 708         return 0;
 709 }
 710
 711 static int bcap_querycap(struct file *file, void  *priv,
 712                                 struct v4l2_capability *cap)
 713 {
 714         struct bcap_device *bcap_dev = video_drvdata(file);
 715
 716         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 717         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 718         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 719         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 720         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 721         return 0;
 722 }
 723
 724 static int bcap_g_parm(struct file *file, void *fh,
 725                                 struct v4l2_streamparm *a)
 726 {
 727         struct bcap_device *bcap_dev = video_drvdata(file);
 728
 729         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 730                 return -EINVAL;
 731         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 732 }
 733
 734 static int bcap_s_parm(struct file *file, void *fh,
 735                                 struct v4l2_streamparm *a)
 736 {
 737         struct bcap_device *bcap_dev = video_drvdata(file);
 738
 739         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 740                 return -EINVAL;
 741         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 742 }
 743
 744 static int bcap_log_status(struct file *file, void *priv)
 745 {
 746         struct bcap_device *bcap_dev = video_drvdata(file);
 747         /* status for sub devices */
 748         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 749         return 0;
 750 }
 751
 752 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 753         .vidioc_querycap         = bcap_querycap,
 754         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 755         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 756         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 757         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 758         .vidioc_enum_input       = bcap_enum_input,
 759         .vidioc_g_input          = bcap_g_input,
 760         .vidioc_s_input          = bcap_s_input,
 761         .vidioc_querystd         = bcap_querystd,
 762         .vidioc_s_std            = bcap_s_std,
 763         .vidioc_g_std            = bcap_g_std,
 764         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 765         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 766         .vidioc_query_dv_timings = bcap_query_dv_timings,
 767         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 768         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
 769         .vidioc_create_bufs      = vb2_ioctl_create_bufs,
 770         .vidioc_querybuf         = vb2_ioctl_querybuf,
 771         .vidioc_qbuf             = vb2_ioctl_qbuf,
 772         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
 773         .vidioc_expbuf           = vb2_ioctl_expbuf,
 774         .vidioc_streamon         = vb2_ioctl_streamon,
 775         .vidioc_streamoff        = vb2_ioctl_streamoff,
 776         .vidioc_g_parm           = bcap_g_parm,
 777         .vidioc_s_parm           = bcap_s_parm,
 778         .vidioc_log_status       = bcap_log_status,
 779 };
 780
 781 static struct v4l2_file_operations bcap_fops = {
 782         .owner = THIS_MODULE,
 783         .open = v4l2_fh_open,
 784         .release = vb2_fop_release,
 785         .unlocked_ioctl = video_ioctl2,
 786         .mmap = vb2_fop_mmap,
 787 #ifndef CONFIG_MMU
 788         .get_unmapped_area = vb2_fop_get_unmapped_area,
 789 #endif
 790         .poll = vb2_fop_poll
 791 };
 792
 793 static int bcap_probe(struct platform_device *pdev)
 794 {
 795         struct bcap_device *bcap_dev;
 796         struct video_device *vfd;
 797         struct i2c_adapter *i2c_adap;
 798         struct bfin_capture_config *config;
 799         struct vb2_queue *q;
 800         struct bcap_route *route;
 801         int ret;
 802
 803         config = pdev->dev.platform_data;
 804         if (!config || !config->num_inputs) {
 805                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 806                 return -ENODEV;
 807         }
 808
 809         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 810         if (!bcap_dev) {
 811                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 812                 return -ENOMEM;
 813         }
 814
 815         bcap_dev->cfg = config;
 816
 817         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 818         if (!bcap_dev->ppi) {
 819                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 820                 ret = -ENODEV;
 821                 goto err_free_dev;
 822         }
 823         bcap_dev->ppi->priv = bcap_dev;
 824
 825         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 826         if (IS_ERR(bcap_dev->alloc_ctx)) {
 827                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 828                 goto err_free_ppi;
 829         }
 830
 831         vfd = &bcap_dev->video_dev;
 832         /* initialize field of video device */
 833         vfd->release            = video_device_release_empty;
 834         vfd->fops               = &bcap_fops;
 835         vfd->ioctl_ops          = &bcap_ioctl_ops;
 836         vfd->tvnorms            = 0;
 837         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 838         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 839
 840         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 841         if (ret) {
 842                 v4l2_err(pdev->dev.driver,
 843                                 "Unable to register v4l2 device\n");
 844                 goto err_cleanup_ctx;
 845         }
 846         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 847
 848         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 849         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 850         if (ret) {
 851                 v4l2_err(&bcap_dev->v4l2_dev,
 852                                 "Unable to init control handler\n");
 853                 goto err_unreg_v4l2;
 854         }
 855
 856         spin_lock_init(&bcap_dev->lock);
 857         /* initialize queue */
 858         q = &bcap_dev->buffer_queue;
 859         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 860         q->io_modes = VB2_MMAP | VB2_DMABUF;
 861         q->drv_priv = bcap_dev;
 862         q->buf_struct_size = sizeof(struct bcap_buffer);
 863         q->ops = &bcap_video_qops;
 864         q->mem_ops = &vb2_dma_contig_memops;
 865         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 866         q->lock = &bcap_dev->mutex;
 867         q->min_buffers_needed = 1;
 868
 869         ret = vb2_queue_init(q);
 870         if (ret)
 871                 goto err_free_handler;
 872
 873         mutex_init(&bcap_dev->mutex);
 874         init_completion(&bcap_dev->comp);
 875
 876         /* init video dma queues */
 877         INIT_LIST_HEAD(&bcap_dev->dma_queue);
 878
 879         vfd->lock = &bcap_dev->mutex;
 880         vfd->queue = q;
 881
 882         /* register video device */
 883         ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
 884         if (ret) {
 885                 v4l2_err(&bcap_dev->v4l2_dev,
 886                                 "Unable to register video device\n");
 887                 goto err_free_handler;
 888         }
 889         video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
 890         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
 891                         video_device_node_name(vfd));
 892
 893         /* load up the subdevice */
 894         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
 895         if (!i2c_adap) {
 896                 v4l2_err(&bcap_dev->v4l2_dev,
 897                                 "Unable to find i2c adapter\n");
 898                 ret = -ENODEV;
 899                 goto err_unreg_vdev;
 900
 901         }
 902         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
 903                                                  i2c_adap,
 904                                                  &config->board_info,
 905                                                  NULL);
 906         if (bcap_dev->sd) {
 907                 int i;
 908
 909                 /* update tvnorms from the sub devices */
 910                 for (i = 0; i < config->num_inputs; i++)
 911                         vfd->tvnorms |= config->inputs[i].std;
 912         } else {
 913                 v4l2_err(&bcap_dev->v4l2_dev,
 914                                 "Unable to register sub device\n");
 915                 ret = -ENODEV;
 916                 goto err_unreg_vdev;
 917         }
 918
 919         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
 920
 921         /*
 922          * explicitly set input, otherwise some boards
 923          * may not work at the state as we expected
 924          */
 925         route = &config->routes[0];
 926         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 927                                 route->input, route->output, 0);
 928         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 929                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 930                 goto err_unreg_vdev;
 931         }
 932         bcap_dev->cur_input = 0;
 933         /* if this route has specific config, update ppi control */
 934         if (route->ppi_control)
 935                 config->ppi_control = route->ppi_control;
 936
 937         /* now we can probe the default state */
 938         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
 939                 v4l2_std_id std;
 940                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
 941                 if (ret) {
 942                         v4l2_err(&bcap_dev->v4l2_dev,
 943                                         "Unable to get std\n");
 944                         goto err_unreg_vdev;
 945                 }
 946                 bcap_dev->std = std;
 947         }
 948         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
 949                 struct v4l2_dv_timings dv_timings;
 950                 ret = v4l2_subdev_call(bcap_dev->sd, video,
 951                                 g_dv_timings, &dv_timings);
 952                 if (ret) {
 953                         v4l2_err(&bcap_dev->v4l2_dev,
 954                                         "Unable to get dv timings\n");
 955                         goto err_unreg_vdev;
 956                 }
 957                 bcap_dev->dv_timings = dv_timings;
 958         }
 959         ret = bcap_init_sensor_formats(bcap_dev);
 960         if (ret) {
 961                 v4l2_err(&bcap_dev->v4l2_dev,
 962                                 "Unable to create sensor formats table\n");
 963                 goto err_unreg_vdev;
 964         }
 965         return 0;
 966 err_unreg_vdev:
 967         video_unregister_device(&bcap_dev->video_dev);
 968 err_free_handler:
 969         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 970 err_unreg_v4l2:
 971         v4l2_device_unregister(&bcap_dev->v4l2_dev);
 972 err_cleanup_ctx:
 973         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
 974 err_free_ppi:
 975         ppi_delete_instance(bcap_dev->ppi);
 976 err_free_dev:
 977         kfree(bcap_dev);
 978         return ret;
 979 }
 980
 981 static int bcap_remove(struct platform_device *pdev)
 982 {
 983         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
 984         struct bcap_device *bcap_dev = container_of(v4l2_dev,
 985                                                 struct bcap_device, v4l2_dev);
 986
 987         bcap_free_sensor_formats(bcap_dev);
 988         video_unregister_device(&bcap_dev->video_dev);
 989         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
 990         v4l2_device_unregister(v4l2_dev);
 991         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
 992         ppi_delete_instance(bcap_dev->ppi);
 993         kfree(bcap_dev);
 994         return 0;
 995 }
 996
 997 static struct platform_driver bcap_driver = {
 998         .driver = {
 999                 .name  = CAPTURE_DRV_NAME,
1000         },
1001         .probe = bcap_probe,
1002         .remove = bcap_remove,
1003 };
1004 module_platform_driver(bcap_driver);
1005
1006 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1007 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1008 MODULE_LICENSE("GPL v2");