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 #define BCAP_MIN_NUM_BUF        2
  48
  49 struct bcap_format {
  50         char *desc;
  51         u32 pixelformat;
  52         enum v4l2_mbus_pixelcode mbus_code;
  53         int bpp; /* bits per pixel */
  54         int dlen; /* data length for ppi in bits */
  55 };
  56
  57 struct bcap_buffer {
  58         struct vb2_buffer vb;
  59         struct list_head list;
  60 };
  61
  62 struct bcap_device {
  63         /* capture device instance */
  64         struct v4l2_device v4l2_dev;
  65         /* v4l2 control handler */
  66         struct v4l2_ctrl_handler ctrl_handler;
  67         /* device node data */
  68         struct video_device *video_dev;
  69         /* sub device instance */
  70         struct v4l2_subdev *sd;
  71         /* capture config */
  72         struct bfin_capture_config *cfg;
  73         /* ppi interface */
  74         struct ppi_if *ppi;
  75         /* current input */
  76         unsigned int cur_input;
  77         /* current selected standard */
  78         v4l2_std_id std;
  79         /* current selected dv_timings */
  80         struct v4l2_dv_timings dv_timings;
  81         /* used to store pixel format */
  82         struct v4l2_pix_format fmt;
  83         /* bits per pixel*/
  84         int bpp;
  85         /* data length for ppi in bits */
  86         int dlen;
  87         /* used to store sensor supported format */
  88         struct bcap_format *sensor_formats;
  89         /* number of sensor formats array */
  90         int num_sensor_formats;
  91         /* pointing to current video buffer */
  92         struct bcap_buffer *cur_frm;
  93         /* buffer queue used in videobuf2 */
  94         struct vb2_queue buffer_queue;
  95         /* allocator-specific contexts for each plane */
  96         struct vb2_alloc_ctx *alloc_ctx;
  97         /* queue of filled frames */
  98         struct list_head dma_queue;
  99         /* used in videobuf2 callback */
 100         spinlock_t lock;
 101         /* used to access capture device */
 102         struct mutex mutex;
 103         /* used to wait ppi to complete one transfer */
 104         struct completion comp;
 105         /* prepare to stop */
 106         bool stop;
 107 };
 108
 109 struct bcap_fh {
 110         struct v4l2_fh fh;
 111         /* indicates whether this file handle is doing IO */
 112         bool io_allowed;
 113 };
 114
 115 static const struct bcap_format bcap_formats[] = {
 116         {
 117                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 118                 .pixelformat = V4L2_PIX_FMT_UYVY,
 119                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_2X8,
 120                 .bpp         = 16,
 121                 .dlen        = 8,
 122         },
 123         {
 124                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
 125                 .pixelformat = V4L2_PIX_FMT_YUYV,
 126                 .mbus_code   = V4L2_MBUS_FMT_YUYV8_2X8,
 127                 .bpp         = 16,
 128                 .dlen        = 8,
 129         },
 130         {
 131                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
 132                 .pixelformat = V4L2_PIX_FMT_UYVY,
 133                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_1X16,
 134                 .bpp         = 16,
 135                 .dlen        = 16,
 136         },
 137         {
 138                 .desc        = "RGB 565",
 139                 .pixelformat = V4L2_PIX_FMT_RGB565,
 140                 .mbus_code   = V4L2_MBUS_FMT_RGB565_2X8_LE,
 141                 .bpp         = 16,
 142                 .dlen        = 8,
 143         },
 144         {
 145                 .desc        = "RGB 444",
 146                 .pixelformat = V4L2_PIX_FMT_RGB444,
 147                 .mbus_code   = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
 148                 .bpp         = 16,
 149                 .dlen        = 8,
 150         },
 151
 152 };
 153 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
 154
 155 static irqreturn_t bcap_isr(int irq, void *dev_id);
 156
 157 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
 158 {
 159         return container_of(vb, struct bcap_buffer, vb);
 160 }
 161
 162 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
 163 {
 164         enum v4l2_mbus_pixelcode code;
 165         struct bcap_format *sf;
 166         unsigned int num_formats = 0;
 167         int i, j;
 168
 169         while (!v4l2_subdev_call(bcap_dev->sd, video,
 170                                 enum_mbus_fmt, num_formats, &code))
 171                 num_formats++;
 172         if (!num_formats)
 173                 return -ENXIO;
 174
 175         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
 176         if (!sf)
 177                 return -ENOMEM;
 178
 179         for (i = 0; i < num_formats; i++) {
 180                 v4l2_subdev_call(bcap_dev->sd, video,
 181                                 enum_mbus_fmt, i, &code);
 182                 for (j = 0; j < BCAP_MAX_FMTS; j++)
 183                         if (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_open(struct file *file)
 205 {
 206         struct bcap_device *bcap_dev = video_drvdata(file);
 207         struct video_device *vfd = bcap_dev->video_dev;
 208         struct bcap_fh *bcap_fh;
 209
 210         if (!bcap_dev->sd) {
 211                 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
 212                 return -ENODEV;
 213         }
 214
 215         bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
 216         if (!bcap_fh) {
 217                 v4l2_err(&bcap_dev->v4l2_dev,
 218                          "unable to allocate memory for file handle object\n");
 219                 return -ENOMEM;
 220         }
 221
 222         v4l2_fh_init(&bcap_fh->fh, vfd);
 223
 224         /* store pointer to v4l2_fh in private_data member of file */
 225         file->private_data = &bcap_fh->fh;
 226         v4l2_fh_add(&bcap_fh->fh);
 227         bcap_fh->io_allowed = false;
 228         return 0;
 229 }
 230
 231 static int bcap_release(struct file *file)
 232 {
 233         struct bcap_device *bcap_dev = video_drvdata(file);
 234         struct v4l2_fh *fh = file->private_data;
 235         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 236
 237         /* if this instance is doing IO */
 238         if (bcap_fh->io_allowed)
 239                 vb2_queue_release(&bcap_dev->buffer_queue);
 240
 241         file->private_data = NULL;
 242         v4l2_fh_del(&bcap_fh->fh);
 243         v4l2_fh_exit(&bcap_fh->fh);
 244         kfree(bcap_fh);
 245         return 0;
 246 }
 247
 248 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
 249 {
 250         struct bcap_device *bcap_dev = video_drvdata(file);
 251         int ret;
 252
 253         if (mutex_lock_interruptible(&bcap_dev->mutex))
 254                 return -ERESTARTSYS;
 255         ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
 256         mutex_unlock(&bcap_dev->mutex);
 257         return ret;
 258 }
 259
 260 #ifndef CONFIG_MMU
 261 static unsigned long bcap_get_unmapped_area(struct file *file,
 262                                             unsigned long addr,
 263                                             unsigned long len,
 264                                             unsigned long pgoff,
 265                                             unsigned long flags)
 266 {
 267         struct bcap_device *bcap_dev = video_drvdata(file);
 268
 269         return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
 270                                      addr,
 271                                      len,
 272                                      pgoff,
 273                                      flags);
 274 }
 275 #endif
 276
 277 static unsigned int bcap_poll(struct file *file, poll_table *wait)
 278 {
 279         struct bcap_device *bcap_dev = video_drvdata(file);
 280         unsigned int res;
 281
 282         mutex_lock(&bcap_dev->mutex);
 283         res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
 284         mutex_unlock(&bcap_dev->mutex);
 285         return res;
 286 }
 287
 288 static int bcap_queue_setup(struct vb2_queue *vq,
 289                                 const struct v4l2_format *fmt,
 290                                 unsigned int *nbuffers, unsigned int *nplanes,
 291                                 unsigned int sizes[], void *alloc_ctxs[])
 292 {
 293         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 294
 295         if (*nbuffers < BCAP_MIN_NUM_BUF)
 296                 *nbuffers = BCAP_MIN_NUM_BUF;
 297
 298         *nplanes = 1;
 299         sizes[0] = bcap_dev->fmt.sizeimage;
 300         alloc_ctxs[0] = bcap_dev->alloc_ctx;
 301
 302         return 0;
 303 }
 304
 305 static int bcap_buffer_init(struct vb2_buffer *vb)
 306 {
 307         struct bcap_buffer *buf = to_bcap_vb(vb);
 308
 309         INIT_LIST_HEAD(&buf->list);
 310         return 0;
 311 }
 312
 313 static int bcap_buffer_prepare(struct vb2_buffer *vb)
 314 {
 315         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 316         struct bcap_buffer *buf = to_bcap_vb(vb);
 317         unsigned long size;
 318
 319         size = bcap_dev->fmt.sizeimage;
 320         if (vb2_plane_size(vb, 0) < size) {
 321                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
 322                                 vb2_plane_size(vb, 0), size);
 323                 return -EINVAL;
 324         }
 325         vb2_set_plane_payload(&buf->vb, 0, size);
 326
 327         return 0;
 328 }
 329
 330 static void bcap_buffer_queue(struct vb2_buffer *vb)
 331 {
 332         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 333         struct bcap_buffer *buf = to_bcap_vb(vb);
 334         unsigned long flags;
 335
 336         spin_lock_irqsave(&bcap_dev->lock, flags);
 337         list_add_tail(&buf->list, &bcap_dev->dma_queue);
 338         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 339 }
 340
 341 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
 342 {
 343         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
 344         struct bcap_buffer *buf = to_bcap_vb(vb);
 345         unsigned long flags;
 346
 347         spin_lock_irqsave(&bcap_dev->lock, flags);
 348         list_del_init(&buf->list);
 349         spin_unlock_irqrestore(&bcap_dev->lock, flags);
 350 }
 351
 352 static void bcap_lock(struct vb2_queue *vq)
 353 {
 354         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 355         mutex_lock(&bcap_dev->mutex);
 356 }
 357
 358 static void bcap_unlock(struct vb2_queue *vq)
 359 {
 360         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 361         mutex_unlock(&bcap_dev->mutex);
 362 }
 363
 364 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
 365 {
 366         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 367         struct ppi_if *ppi = bcap_dev->ppi;
 368         struct ppi_params params;
 369         int ret;
 370
 371         /* enable streamon on the sub device */
 372         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
 373         if (ret && (ret != -ENOIOCTLCMD)) {
 374                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
 375                 return ret;
 376         }
 377
 378         /* set ppi params */
 379         params.width = bcap_dev->fmt.width;
 380         params.height = bcap_dev->fmt.height;
 381         params.bpp = bcap_dev->bpp;
 382         params.dlen = bcap_dev->dlen;
 383         params.ppi_control = bcap_dev->cfg->ppi_control;
 384         params.int_mask = bcap_dev->cfg->int_mask;
 385         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 386                         & V4L2_IN_CAP_DV_TIMINGS) {
 387                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
 388
 389                 params.hdelay = bt->hsync + bt->hbackporch;
 390                 params.vdelay = bt->vsync + bt->vbackporch;
 391                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
 392                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
 393         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
 394                         & V4L2_IN_CAP_STD) {
 395                 params.hdelay = 0;
 396                 params.vdelay = 0;
 397                 if (bcap_dev->std & V4L2_STD_525_60) {
 398                         params.line = 858;
 399                         params.frame = 525;
 400                 } else {
 401                         params.line = 864;
 402                         params.frame = 625;
 403                 }
 404         } else {
 405                 params.hdelay = 0;
 406                 params.vdelay = 0;
 407                 params.line = params.width + bcap_dev->cfg->blank_pixels;
 408                 params.frame = params.height;
 409         }
 410         ret = ppi->ops->set_params(ppi, &params);
 411         if (ret < 0) {
 412                 v4l2_err(&bcap_dev->v4l2_dev,
 413                                 "Error in setting ppi params\n");
 414                 return ret;
 415         }
 416
 417         /* attach ppi DMA irq handler */
 418         ret = ppi->ops->attach_irq(ppi, bcap_isr);
 419         if (ret < 0) {
 420                 v4l2_err(&bcap_dev->v4l2_dev,
 421                                 "Error in attaching interrupt handler\n");
 422                 return ret;
 423         }
 424
 425         INIT_COMPLETION(bcap_dev->comp);
 426         bcap_dev->stop = false;
 427         return 0;
 428 }
 429
 430 static int bcap_stop_streaming(struct vb2_queue *vq)
 431 {
 432         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
 433         struct ppi_if *ppi = bcap_dev->ppi;
 434         int ret;
 435
 436         if (!vb2_is_streaming(vq))
 437                 return 0;
 438
 439         bcap_dev->stop = true;
 440         wait_for_completion(&bcap_dev->comp);
 441         ppi->ops->stop(ppi);
 442         ppi->ops->detach_irq(ppi);
 443         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 444         if (ret && (ret != -ENOIOCTLCMD))
 445                 v4l2_err(&bcap_dev->v4l2_dev,
 446                                 "stream off failed in subdev\n");
 447
 448         /* release all active buffers */
 449         while (!list_empty(&bcap_dev->dma_queue)) {
 450                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 451                                                 struct bcap_buffer, list);
 452                 list_del(&bcap_dev->cur_frm->list);
 453                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 454         }
 455         return 0;
 456 }
 457
 458 static struct vb2_ops bcap_video_qops = {
 459         .queue_setup            = bcap_queue_setup,
 460         .buf_init               = bcap_buffer_init,
 461         .buf_prepare            = bcap_buffer_prepare,
 462         .buf_cleanup            = bcap_buffer_cleanup,
 463         .buf_queue              = bcap_buffer_queue,
 464         .wait_prepare           = bcap_unlock,
 465         .wait_finish            = bcap_lock,
 466         .start_streaming        = bcap_start_streaming,
 467         .stop_streaming         = bcap_stop_streaming,
 468 };
 469
 470 static int bcap_reqbufs(struct file *file, void *priv,
 471                         struct v4l2_requestbuffers *req_buf)
 472 {
 473         struct bcap_device *bcap_dev = video_drvdata(file);
 474         struct vb2_queue *vq = &bcap_dev->buffer_queue;
 475         struct v4l2_fh *fh = file->private_data;
 476         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 477
 478         if (vb2_is_busy(vq))
 479                 return -EBUSY;
 480
 481         bcap_fh->io_allowed = true;
 482
 483         return vb2_reqbufs(vq, req_buf);
 484 }
 485
 486 static int bcap_querybuf(struct file *file, void *priv,
 487                                 struct v4l2_buffer *buf)
 488 {
 489         struct bcap_device *bcap_dev = video_drvdata(file);
 490
 491         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
 492 }
 493
 494 static int bcap_qbuf(struct file *file, void *priv,
 495                         struct v4l2_buffer *buf)
 496 {
 497         struct bcap_device *bcap_dev = video_drvdata(file);
 498         struct v4l2_fh *fh = file->private_data;
 499         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 500
 501         if (!bcap_fh->io_allowed)
 502                 return -EBUSY;
 503
 504         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 505 }
 506
 507 static int bcap_dqbuf(struct file *file, void *priv,
 508                         struct v4l2_buffer *buf)
 509 {
 510         struct bcap_device *bcap_dev = video_drvdata(file);
 511         struct v4l2_fh *fh = file->private_data;
 512         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 513
 514         if (!bcap_fh->io_allowed)
 515                 return -EBUSY;
 516
 517         return vb2_dqbuf(&bcap_dev->buffer_queue,
 518                                 buf, file->f_flags & O_NONBLOCK);
 519 }
 520
 521 static irqreturn_t bcap_isr(int irq, void *dev_id)
 522 {
 523         struct ppi_if *ppi = dev_id;
 524         struct bcap_device *bcap_dev = ppi->priv;
 525         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 526         dma_addr_t addr;
 527
 528         spin_lock(&bcap_dev->lock);
 529
 530         if (!list_empty(&bcap_dev->dma_queue)) {
 531                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 532                 if (ppi->err) {
 533                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 534                         ppi->err = false;
 535                 } else {
 536                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 537                 }
 538                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 539                                 struct bcap_buffer, list);
 540                 list_del(&bcap_dev->cur_frm->list);
 541         } else {
 542                 /* clear error flag, we will get a new frame */
 543                 if (ppi->err)
 544                         ppi->err = false;
 545         }
 546
 547         ppi->ops->stop(ppi);
 548
 549         if (bcap_dev->stop) {
 550                 complete(&bcap_dev->comp);
 551         } else {
 552                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 553                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 554                 ppi->ops->start(ppi);
 555         }
 556
 557         spin_unlock(&bcap_dev->lock);
 558
 559         return IRQ_HANDLED;
 560 }
 561
 562 static int bcap_streamon(struct file *file, void *priv,
 563                                 enum v4l2_buf_type buf_type)
 564 {
 565         struct bcap_device *bcap_dev = video_drvdata(file);
 566         struct bcap_fh *fh = file->private_data;
 567         struct ppi_if *ppi = bcap_dev->ppi;
 568         dma_addr_t addr;
 569         int ret;
 570
 571         if (!fh->io_allowed)
 572                 return -EBUSY;
 573
 574         /* call streamon to start streaming in videobuf */
 575         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 576         if (ret)
 577                 return ret;
 578
 579         /* if dma queue is empty, return error */
 580         if (list_empty(&bcap_dev->dma_queue)) {
 581                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
 582                 ret = -EINVAL;
 583                 goto err;
 584         }
 585
 586         /* get the next frame from the dma queue */
 587         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 588                                         struct bcap_buffer, list);
 589         /* remove buffer from the dma queue */
 590         list_del(&bcap_dev->cur_frm->list);
 591         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 592         /* update DMA address */
 593         ppi->ops->update_addr(ppi, (unsigned long)addr);
 594         /* enable ppi */
 595         ppi->ops->start(ppi);
 596
 597         return 0;
 598 err:
 599         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 600         return ret;
 601 }
 602
 603 static int bcap_streamoff(struct file *file, void *priv,
 604                                 enum v4l2_buf_type buf_type)
 605 {
 606         struct bcap_device *bcap_dev = video_drvdata(file);
 607         struct bcap_fh *fh = file->private_data;
 608
 609         if (!fh->io_allowed)
 610                 return -EBUSY;
 611
 612         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 613 }
 614
 615 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 616 {
 617         struct bcap_device *bcap_dev = video_drvdata(file);
 618
 619         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 620 }
 621
 622 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 623 {
 624         struct bcap_device *bcap_dev = video_drvdata(file);
 625
 626         *std = bcap_dev->std;
 627         return 0;
 628 }
 629
 630 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 631 {
 632         struct bcap_device *bcap_dev = video_drvdata(file);
 633         int ret;
 634
 635         if (vb2_is_busy(&bcap_dev->buffer_queue))
 636                 return -EBUSY;
 637
 638         ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, std);
 639         if (ret < 0)
 640                 return ret;
 641
 642         bcap_dev->std = std;
 643         return 0;
 644 }
 645
 646 static int bcap_enum_dv_timings(struct file *file, void *priv,
 647                                 struct v4l2_enum_dv_timings *timings)
 648 {
 649         struct bcap_device *bcap_dev = video_drvdata(file);
 650
 651         return v4l2_subdev_call(bcap_dev->sd, video,
 652                         enum_dv_timings, timings);
 653 }
 654
 655 static int bcap_query_dv_timings(struct file *file, void *priv,
 656                                 struct v4l2_dv_timings *timings)
 657 {
 658         struct bcap_device *bcap_dev = video_drvdata(file);
 659
 660         return v4l2_subdev_call(bcap_dev->sd, video,
 661                                 query_dv_timings, timings);
 662 }
 663
 664 static int bcap_g_dv_timings(struct file *file, void *priv,
 665                                 struct v4l2_dv_timings *timings)
 666 {
 667         struct bcap_device *bcap_dev = video_drvdata(file);
 668
 669         *timings = bcap_dev->dv_timings;
 670         return 0;
 671 }
 672
 673 static int bcap_s_dv_timings(struct file *file, void *priv,
 674                                 struct v4l2_dv_timings *timings)
 675 {
 676         struct bcap_device *bcap_dev = video_drvdata(file);
 677         int ret;
 678         if (vb2_is_busy(&bcap_dev->buffer_queue))
 679                 return -EBUSY;
 680
 681         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 682         if (ret < 0)
 683                 return ret;
 684
 685         bcap_dev->dv_timings = *timings;
 686         return 0;
 687 }
 688
 689 static int bcap_enum_input(struct file *file, void *priv,
 690                                 struct v4l2_input *input)
 691 {
 692         struct bcap_device *bcap_dev = video_drvdata(file);
 693         struct bfin_capture_config *config = bcap_dev->cfg;
 694         int ret;
 695         u32 status;
 696
 697         if (input->index >= config->num_inputs)
 698                 return -EINVAL;
 699
 700         *input = config->inputs[input->index];
 701         /* get input status */
 702         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 703         if (!ret)
 704                 input->status = status;
 705         return 0;
 706 }
 707
 708 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 709 {
 710         struct bcap_device *bcap_dev = video_drvdata(file);
 711
 712         *index = bcap_dev->cur_input;
 713         return 0;
 714 }
 715
 716 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 717 {
 718         struct bcap_device *bcap_dev = video_drvdata(file);
 719         struct bfin_capture_config *config = bcap_dev->cfg;
 720         struct bcap_route *route;
 721         int ret;
 722
 723         if (vb2_is_busy(&bcap_dev->buffer_queue))
 724                 return -EBUSY;
 725
 726         if (index >= config->num_inputs)
 727                 return -EINVAL;
 728
 729         route = &config->routes[index];
 730         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 731                                 route->input, route->output, 0);
 732         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 733                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 734                 return ret;
 735         }
 736         bcap_dev->cur_input = index;
 737         /* if this route has specific config, update ppi control */
 738         if (route->ppi_control)
 739                 config->ppi_control = route->ppi_control;
 740         return 0;
 741 }
 742
 743 static int bcap_try_format(struct bcap_device *bcap,
 744                                 struct v4l2_pix_format *pixfmt,
 745                                 struct bcap_format *bcap_fmt)
 746 {
 747         struct bcap_format *sf = bcap->sensor_formats;
 748         struct bcap_format *fmt = NULL;
 749         struct v4l2_mbus_framefmt mbus_fmt;
 750         int ret, i;
 751
 752         for (i = 0; i < bcap->num_sensor_formats; i++) {
 753                 fmt = &sf[i];
 754                 if (pixfmt->pixelformat == fmt->pixelformat)
 755                         break;
 756         }
 757         if (i == bcap->num_sensor_formats)
 758                 fmt = &sf[0];
 759
 760         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 761         ret = v4l2_subdev_call(bcap->sd, video,
 762                                 try_mbus_fmt, &mbus_fmt);
 763         if (ret < 0)
 764                 return ret;
 765         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 766         if (bcap_fmt) {
 767                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 768                         fmt = &sf[i];
 769                         if (mbus_fmt.code == fmt->mbus_code)
 770                                 break;
 771                 }
 772                 *bcap_fmt = *fmt;
 773         }
 774         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 775         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 776         return 0;
 777 }
 778
 779 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 780                                         struct v4l2_fmtdesc *fmt)
 781 {
 782         struct bcap_device *bcap_dev = video_drvdata(file);
 783         struct bcap_format *sf = bcap_dev->sensor_formats;
 784
 785         if (fmt->index >= bcap_dev->num_sensor_formats)
 786                 return -EINVAL;
 787
 788         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 789         strlcpy(fmt->description,
 790                 sf[fmt->index].desc,
 791                 sizeof(fmt->description));
 792         fmt->pixelformat = sf[fmt->index].pixelformat;
 793         return 0;
 794 }
 795
 796 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 797                                         struct v4l2_format *fmt)
 798 {
 799         struct bcap_device *bcap_dev = video_drvdata(file);
 800         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 801
 802         return bcap_try_format(bcap_dev, pixfmt, NULL);
 803 }
 804
 805 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 806                                 struct v4l2_format *fmt)
 807 {
 808         struct bcap_device *bcap_dev = video_drvdata(file);
 809
 810         fmt->fmt.pix = bcap_dev->fmt;
 811         return 0;
 812 }
 813
 814 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 815                                 struct v4l2_format *fmt)
 816 {
 817         struct bcap_device *bcap_dev = video_drvdata(file);
 818         struct v4l2_mbus_framefmt mbus_fmt;
 819         struct bcap_format bcap_fmt;
 820         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 821         int ret;
 822
 823         if (vb2_is_busy(&bcap_dev->buffer_queue))
 824                 return -EBUSY;
 825
 826         /* see if format works */
 827         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 828         if (ret < 0)
 829                 return ret;
 830
 831         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
 832         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 833         if (ret < 0)
 834                 return ret;
 835         bcap_dev->fmt = *pixfmt;
 836         bcap_dev->bpp = bcap_fmt.bpp;
 837         bcap_dev->dlen = bcap_fmt.dlen;
 838         return 0;
 839 }
 840
 841 static int bcap_querycap(struct file *file, void  *priv,
 842                                 struct v4l2_capability *cap)
 843 {
 844         struct bcap_device *bcap_dev = video_drvdata(file);
 845
 846         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 847         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 848         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 849         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 850         return 0;
 851 }
 852
 853 static int bcap_g_parm(struct file *file, void *fh,
 854                                 struct v4l2_streamparm *a)
 855 {
 856         struct bcap_device *bcap_dev = video_drvdata(file);
 857
 858         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 859                 return -EINVAL;
 860         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 861 }
 862
 863 static int bcap_s_parm(struct file *file, void *fh,
 864                                 struct v4l2_streamparm *a)
 865 {
 866         struct bcap_device *bcap_dev = video_drvdata(file);
 867
 868         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 869                 return -EINVAL;
 870         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 871 }
 872
 873 static int bcap_log_status(struct file *file, void *priv)
 874 {
 875         struct bcap_device *bcap_dev = video_drvdata(file);
 876         /* status for sub devices */
 877         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 878         return 0;
 879 }
 880
 881 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 882         .vidioc_querycap         = bcap_querycap,
 883         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 884         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 885         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 886         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 887         .vidioc_enum_input       = bcap_enum_input,
 888         .vidioc_g_input          = bcap_g_input,
 889         .vidioc_s_input          = bcap_s_input,
 890         .vidioc_querystd         = bcap_querystd,
 891         .vidioc_s_std            = bcap_s_std,
 892         .vidioc_g_std            = bcap_g_std,
 893         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 894         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 895         .vidioc_query_dv_timings = bcap_query_dv_timings,
 896         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 897         .vidioc_reqbufs          = bcap_reqbufs,
 898         .vidioc_querybuf         = bcap_querybuf,
 899         .vidioc_qbuf             = bcap_qbuf,
 900         .vidioc_dqbuf            = bcap_dqbuf,
 901         .vidioc_streamon         = bcap_streamon,
 902         .vidioc_streamoff        = bcap_streamoff,
 903         .vidioc_g_parm           = bcap_g_parm,
 904         .vidioc_s_parm           = bcap_s_parm,
 905         .vidioc_log_status       = bcap_log_status,
 906 };
 907
 908 static struct v4l2_file_operations bcap_fops = {
 909         .owner = THIS_MODULE,
 910         .open = bcap_open,
 911         .release = bcap_release,
 912         .unlocked_ioctl = video_ioctl2,
 913         .mmap = bcap_mmap,
 914 #ifndef CONFIG_MMU
 915         .get_unmapped_area = bcap_get_unmapped_area,
 916 #endif
 917         .poll = bcap_poll
 918 };
 919
 920 static int bcap_probe(struct platform_device *pdev)
 921 {
 922         struct bcap_device *bcap_dev;
 923         struct video_device *vfd;
 924         struct i2c_adapter *i2c_adap;
 925         struct bfin_capture_config *config;
 926         struct vb2_queue *q;
 927         struct bcap_route *route;
 928         int ret;
 929
 930         config = pdev->dev.platform_data;
 931         if (!config || !config->num_inputs) {
 932                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 933                 return -ENODEV;
 934         }
 935
 936         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 937         if (!bcap_dev) {
 938                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 939                 return -ENOMEM;
 940         }
 941
 942         bcap_dev->cfg = config;
 943
 944         bcap_dev->ppi = ppi_create_instance(config->ppi_info);
 945         if (!bcap_dev->ppi) {
 946                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 947                 ret = -ENODEV;
 948                 goto err_free_dev;
 949         }
 950         bcap_dev->ppi->priv = bcap_dev;
 951
 952         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 953         if (IS_ERR(bcap_dev->alloc_ctx)) {
 954                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 955                 goto err_free_ppi;
 956         }
 957
 958         vfd = video_device_alloc();
 959         if (!vfd) {
 960                 ret = -ENOMEM;
 961                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
 962                 goto err_cleanup_ctx;
 963         }
 964
 965         /* initialize field of video device */
 966         vfd->release            = video_device_release;
 967         vfd->fops               = &bcap_fops;
 968         vfd->ioctl_ops          = &bcap_ioctl_ops;
 969         vfd->tvnorms            = 0;
 970         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 971         set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
 972         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 973         bcap_dev->video_dev     = vfd;
 974
 975         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 976         if (ret) {
 977                 v4l2_err(pdev->dev.driver,
 978                                 "Unable to register v4l2 device\n");
 979                 goto err_release_vdev;
 980         }
 981         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 982
 983         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 984         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 985         if (ret) {
 986                 v4l2_err(&bcap_dev->v4l2_dev,
 987                                 "Unable to init control handler\n");
 988                 goto err_unreg_v4l2;
 989         }
 990
 991         spin_lock_init(&bcap_dev->lock);
 992         /* initialize queue */
 993         q = &bcap_dev->buffer_queue;
 994         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 995         q->io_modes = VB2_MMAP;
 996         q->drv_priv = bcap_dev;
 997         q->buf_struct_size = sizeof(struct bcap_buffer);
 998         q->ops = &bcap_video_qops;
 999         q->mem_ops = &vb2_dma_contig_memops;
1000         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1001
1002         ret = vb2_queue_init(q);
1003         if (ret)
1004                 goto err_free_handler;
1005
1006         mutex_init(&bcap_dev->mutex);
1007         init_completion(&bcap_dev->comp);
1008
1009         /* init video dma queues */
1010         INIT_LIST_HEAD(&bcap_dev->dma_queue);
1011
1012         vfd->lock = &bcap_dev->mutex;
1013
1014         /* register video device */
1015         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1016         if (ret) {
1017                 v4l2_err(&bcap_dev->v4l2_dev,
1018                                 "Unable to register video device\n");
1019                 goto err_free_handler;
1020         }
1021         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1022         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1023                         video_device_node_name(vfd));
1024
1025         /* load up the subdevice */
1026         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1027         if (!i2c_adap) {
1028                 v4l2_err(&bcap_dev->v4l2_dev,
1029                                 "Unable to find i2c adapter\n");
1030                 ret = -ENODEV;
1031                 goto err_unreg_vdev;
1032
1033         }
1034         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1035                                                  i2c_adap,
1036                                                  &config->board_info,
1037                                                  NULL);
1038         if (bcap_dev->sd) {
1039                 int i;
1040
1041                 /* update tvnorms from the sub devices */
1042                 for (i = 0; i < config->num_inputs; i++)
1043                         vfd->tvnorms |= config->inputs[i].std;
1044         } else {
1045                 v4l2_err(&bcap_dev->v4l2_dev,
1046                                 "Unable to register sub device\n");
1047                 ret = -ENODEV;
1048                 goto err_unreg_vdev;
1049         }
1050
1051         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1052
1053         /*
1054          * explicitly set input, otherwise some boards
1055          * may not work at the state as we expected
1056          */
1057         route = &config->routes[0];
1058         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1059                                 route->input, route->output, 0);
1060         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1061                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1062                 goto err_unreg_vdev;
1063         }
1064         bcap_dev->cur_input = 0;
1065         /* if this route has specific config, update ppi control */
1066         if (route->ppi_control)
1067                 config->ppi_control = route->ppi_control;
1068
1069         /* now we can probe the default state */
1070         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1071                 v4l2_std_id std;
1072                 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
1073                 if (ret) {
1074                         v4l2_err(&bcap_dev->v4l2_dev,
1075                                         "Unable to get std\n");
1076                         goto err_unreg_vdev;
1077                 }
1078                 bcap_dev->std = std;
1079         }
1080         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1081                 struct v4l2_dv_timings dv_timings;
1082                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1083                                 g_dv_timings, &dv_timings);
1084                 if (ret) {
1085                         v4l2_err(&bcap_dev->v4l2_dev,
1086                                         "Unable to get dv timings\n");
1087                         goto err_unreg_vdev;
1088                 }
1089                 bcap_dev->dv_timings = dv_timings;
1090         }
1091         ret = bcap_init_sensor_formats(bcap_dev);
1092         if (ret) {
1093                 v4l2_err(&bcap_dev->v4l2_dev,
1094                                 "Unable to create sensor formats table\n");
1095                 goto err_unreg_vdev;
1096         }
1097         return 0;
1098 err_unreg_vdev:
1099         video_unregister_device(bcap_dev->video_dev);
1100         bcap_dev->video_dev = NULL;
1101 err_free_handler:
1102         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1103 err_unreg_v4l2:
1104         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1105 err_release_vdev:
1106         if (bcap_dev->video_dev)
1107                 video_device_release(bcap_dev->video_dev);
1108 err_cleanup_ctx:
1109         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1110 err_free_ppi:
1111         ppi_delete_instance(bcap_dev->ppi);
1112 err_free_dev:
1113         kfree(bcap_dev);
1114         return ret;
1115 }
1116
1117 static int bcap_remove(struct platform_device *pdev)
1118 {
1119         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1120         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1121                                                 struct bcap_device, v4l2_dev);
1122
1123         bcap_free_sensor_formats(bcap_dev);
1124         video_unregister_device(bcap_dev->video_dev);
1125         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1126         v4l2_device_unregister(v4l2_dev);
1127         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1128         ppi_delete_instance(bcap_dev->ppi);
1129         kfree(bcap_dev);
1130         return 0;
1131 }
1132
1133 static struct platform_driver bcap_driver = {
1134         .driver = {
1135                 .name  = CAPTURE_DRV_NAME,
1136                 .owner = THIS_MODULE,
1137         },
1138         .probe = bcap_probe,
1139         .remove = bcap_remove,
1140 };
1141 module_platform_driver(bcap_driver);
1142
1143 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1144 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1145 MODULE_LICENSE("GPL v2");