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         reinit_completion(&bcap_dev->comp);
 426         bcap_dev->stop = false;
 427         return 0;
 428 }
 429
 430 static void 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         bcap_dev->stop = true;
 437         wait_for_completion(&bcap_dev->comp);
 438         ppi->ops->stop(ppi);
 439         ppi->ops->detach_irq(ppi);
 440         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
 441         if (ret && (ret != -ENOIOCTLCMD))
 442                 v4l2_err(&bcap_dev->v4l2_dev,
 443                                 "stream off failed in subdev\n");
 444
 445         /* release all active buffers */
 446         while (!list_empty(&bcap_dev->dma_queue)) {
 447                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 448                                                 struct bcap_buffer, list);
 449                 list_del_init(&bcap_dev->cur_frm->list);
 450                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
 451         }
 452 }
 453
 454 static struct vb2_ops bcap_video_qops = {
 455         .queue_setup            = bcap_queue_setup,
 456         .buf_init               = bcap_buffer_init,
 457         .buf_prepare            = bcap_buffer_prepare,
 458         .buf_cleanup            = bcap_buffer_cleanup,
 459         .buf_queue              = bcap_buffer_queue,
 460         .wait_prepare           = bcap_unlock,
 461         .wait_finish            = bcap_lock,
 462         .start_streaming        = bcap_start_streaming,
 463         .stop_streaming         = bcap_stop_streaming,
 464 };
 465
 466 static int bcap_reqbufs(struct file *file, void *priv,
 467                         struct v4l2_requestbuffers *req_buf)
 468 {
 469         struct bcap_device *bcap_dev = video_drvdata(file);
 470         struct vb2_queue *vq = &bcap_dev->buffer_queue;
 471         struct v4l2_fh *fh = file->private_data;
 472         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 473
 474         if (vb2_is_busy(vq))
 475                 return -EBUSY;
 476
 477         bcap_fh->io_allowed = true;
 478
 479         return vb2_reqbufs(vq, req_buf);
 480 }
 481
 482 static int bcap_querybuf(struct file *file, void *priv,
 483                                 struct v4l2_buffer *buf)
 484 {
 485         struct bcap_device *bcap_dev = video_drvdata(file);
 486
 487         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
 488 }
 489
 490 static int bcap_qbuf(struct file *file, void *priv,
 491                         struct v4l2_buffer *buf)
 492 {
 493         struct bcap_device *bcap_dev = video_drvdata(file);
 494         struct v4l2_fh *fh = file->private_data;
 495         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 496
 497         if (!bcap_fh->io_allowed)
 498                 return -EBUSY;
 499
 500         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
 501 }
 502
 503 static int bcap_dqbuf(struct file *file, void *priv,
 504                         struct v4l2_buffer *buf)
 505 {
 506         struct bcap_device *bcap_dev = video_drvdata(file);
 507         struct v4l2_fh *fh = file->private_data;
 508         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
 509
 510         if (!bcap_fh->io_allowed)
 511                 return -EBUSY;
 512
 513         return vb2_dqbuf(&bcap_dev->buffer_queue,
 514                                 buf, file->f_flags & O_NONBLOCK);
 515 }
 516
 517 static irqreturn_t bcap_isr(int irq, void *dev_id)
 518 {
 519         struct ppi_if *ppi = dev_id;
 520         struct bcap_device *bcap_dev = ppi->priv;
 521         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
 522         dma_addr_t addr;
 523
 524         spin_lock(&bcap_dev->lock);
 525
 526         if (!list_empty(&bcap_dev->dma_queue)) {
 527                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 528                 if (ppi->err) {
 529                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 530                         ppi->err = false;
 531                 } else {
 532                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 533                 }
 534                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 535                                 struct bcap_buffer, list);
 536                 list_del_init(&bcap_dev->cur_frm->list);
 537         } else {
 538                 /* clear error flag, we will get a new frame */
 539                 if (ppi->err)
 540                         ppi->err = false;
 541         }
 542
 543         ppi->ops->stop(ppi);
 544
 545         if (bcap_dev->stop) {
 546                 complete(&bcap_dev->comp);
 547         } else {
 548                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 549                 ppi->ops->update_addr(ppi, (unsigned long)addr);
 550                 ppi->ops->start(ppi);
 551         }
 552
 553         spin_unlock(&bcap_dev->lock);
 554
 555         return IRQ_HANDLED;
 556 }
 557
 558 static int bcap_streamon(struct file *file, void *priv,
 559                                 enum v4l2_buf_type buf_type)
 560 {
 561         struct bcap_device *bcap_dev = video_drvdata(file);
 562         struct bcap_fh *fh = file->private_data;
 563         struct ppi_if *ppi = bcap_dev->ppi;
 564         dma_addr_t addr;
 565         int ret;
 566
 567         if (!fh->io_allowed)
 568                 return -EBUSY;
 569
 570         /* call streamon to start streaming in videobuf */
 571         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
 572         if (ret)
 573                 return ret;
 574
 575         /* if dma queue is empty, return error */
 576         if (list_empty(&bcap_dev->dma_queue)) {
 577                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
 578                 ret = -EINVAL;
 579                 goto err;
 580         }
 581
 582         /* get the next frame from the dma queue */
 583         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
 584                                         struct bcap_buffer, list);
 585         /* remove buffer from the dma queue */
 586         list_del_init(&bcap_dev->cur_frm->list);
 587         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
 588         /* update DMA address */
 589         ppi->ops->update_addr(ppi, (unsigned long)addr);
 590         /* enable ppi */
 591         ppi->ops->start(ppi);
 592
 593         return 0;
 594 err:
 595         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 596         return ret;
 597 }
 598
 599 static int bcap_streamoff(struct file *file, void *priv,
 600                                 enum v4l2_buf_type buf_type)
 601 {
 602         struct bcap_device *bcap_dev = video_drvdata(file);
 603         struct bcap_fh *fh = file->private_data;
 604
 605         if (!fh->io_allowed)
 606                 return -EBUSY;
 607
 608         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
 609 }
 610
 611 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
 612 {
 613         struct bcap_device *bcap_dev = video_drvdata(file);
 614
 615         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
 616 }
 617
 618 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
 619 {
 620         struct bcap_device *bcap_dev = video_drvdata(file);
 621
 622         *std = bcap_dev->std;
 623         return 0;
 624 }
 625
 626 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
 627 {
 628         struct bcap_device *bcap_dev = video_drvdata(file);
 629         int ret;
 630
 631         if (vb2_is_busy(&bcap_dev->buffer_queue))
 632                 return -EBUSY;
 633
 634         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
 635         if (ret < 0)
 636                 return ret;
 637
 638         bcap_dev->std = std;
 639         return 0;
 640 }
 641
 642 static int bcap_enum_dv_timings(struct file *file, void *priv,
 643                                 struct v4l2_enum_dv_timings *timings)
 644 {
 645         struct bcap_device *bcap_dev = video_drvdata(file);
 646
 647         timings->pad = 0;
 648
 649         return v4l2_subdev_call(bcap_dev->sd, pad,
 650                         enum_dv_timings, timings);
 651 }
 652
 653 static int bcap_query_dv_timings(struct file *file, void *priv,
 654                                 struct v4l2_dv_timings *timings)
 655 {
 656         struct bcap_device *bcap_dev = video_drvdata(file);
 657
 658         return v4l2_subdev_call(bcap_dev->sd, video,
 659                                 query_dv_timings, timings);
 660 }
 661
 662 static int bcap_g_dv_timings(struct file *file, void *priv,
 663                                 struct v4l2_dv_timings *timings)
 664 {
 665         struct bcap_device *bcap_dev = video_drvdata(file);
 666
 667         *timings = bcap_dev->dv_timings;
 668         return 0;
 669 }
 670
 671 static int bcap_s_dv_timings(struct file *file, void *priv,
 672                                 struct v4l2_dv_timings *timings)
 673 {
 674         struct bcap_device *bcap_dev = video_drvdata(file);
 675         int ret;
 676         if (vb2_is_busy(&bcap_dev->buffer_queue))
 677                 return -EBUSY;
 678
 679         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
 680         if (ret < 0)
 681                 return ret;
 682
 683         bcap_dev->dv_timings = *timings;
 684         return 0;
 685 }
 686
 687 static int bcap_enum_input(struct file *file, void *priv,
 688                                 struct v4l2_input *input)
 689 {
 690         struct bcap_device *bcap_dev = video_drvdata(file);
 691         struct bfin_capture_config *config = bcap_dev->cfg;
 692         int ret;
 693         u32 status;
 694
 695         if (input->index >= config->num_inputs)
 696                 return -EINVAL;
 697
 698         *input = config->inputs[input->index];
 699         /* get input status */
 700         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
 701         if (!ret)
 702                 input->status = status;
 703         return 0;
 704 }
 705
 706 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
 707 {
 708         struct bcap_device *bcap_dev = video_drvdata(file);
 709
 710         *index = bcap_dev->cur_input;
 711         return 0;
 712 }
 713
 714 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
 715 {
 716         struct bcap_device *bcap_dev = video_drvdata(file);
 717         struct bfin_capture_config *config = bcap_dev->cfg;
 718         struct bcap_route *route;
 719         int ret;
 720
 721         if (vb2_is_busy(&bcap_dev->buffer_queue))
 722                 return -EBUSY;
 723
 724         if (index >= config->num_inputs)
 725                 return -EINVAL;
 726
 727         route = &config->routes[index];
 728         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
 729                                 route->input, route->output, 0);
 730         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
 731                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
 732                 return ret;
 733         }
 734         bcap_dev->cur_input = index;
 735         /* if this route has specific config, update ppi control */
 736         if (route->ppi_control)
 737                 config->ppi_control = route->ppi_control;
 738         return 0;
 739 }
 740
 741 static int bcap_try_format(struct bcap_device *bcap,
 742                                 struct v4l2_pix_format *pixfmt,
 743                                 struct bcap_format *bcap_fmt)
 744 {
 745         struct bcap_format *sf = bcap->sensor_formats;
 746         struct bcap_format *fmt = NULL;
 747         struct v4l2_mbus_framefmt mbus_fmt;
 748         int ret, i;
 749
 750         for (i = 0; i < bcap->num_sensor_formats; i++) {
 751                 fmt = &sf[i];
 752                 if (pixfmt->pixelformat == fmt->pixelformat)
 753                         break;
 754         }
 755         if (i == bcap->num_sensor_formats)
 756                 fmt = &sf[0];
 757
 758         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
 759         ret = v4l2_subdev_call(bcap->sd, video,
 760                                 try_mbus_fmt, &mbus_fmt);
 761         if (ret < 0)
 762                 return ret;
 763         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
 764         if (bcap_fmt) {
 765                 for (i = 0; i < bcap->num_sensor_formats; i++) {
 766                         fmt = &sf[i];
 767                         if (mbus_fmt.code == fmt->mbus_code)
 768                                 break;
 769                 }
 770                 *bcap_fmt = *fmt;
 771         }
 772         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
 773         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
 774         return 0;
 775 }
 776
 777 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
 778                                         struct v4l2_fmtdesc *fmt)
 779 {
 780         struct bcap_device *bcap_dev = video_drvdata(file);
 781         struct bcap_format *sf = bcap_dev->sensor_formats;
 782
 783         if (fmt->index >= bcap_dev->num_sensor_formats)
 784                 return -EINVAL;
 785
 786         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 787         strlcpy(fmt->description,
 788                 sf[fmt->index].desc,
 789                 sizeof(fmt->description));
 790         fmt->pixelformat = sf[fmt->index].pixelformat;
 791         return 0;
 792 }
 793
 794 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
 795                                         struct v4l2_format *fmt)
 796 {
 797         struct bcap_device *bcap_dev = video_drvdata(file);
 798         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 799
 800         return bcap_try_format(bcap_dev, pixfmt, NULL);
 801 }
 802
 803 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
 804                                 struct v4l2_format *fmt)
 805 {
 806         struct bcap_device *bcap_dev = video_drvdata(file);
 807
 808         fmt->fmt.pix = bcap_dev->fmt;
 809         return 0;
 810 }
 811
 812 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
 813                                 struct v4l2_format *fmt)
 814 {
 815         struct bcap_device *bcap_dev = video_drvdata(file);
 816         struct v4l2_mbus_framefmt mbus_fmt;
 817         struct bcap_format bcap_fmt;
 818         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 819         int ret;
 820
 821         if (vb2_is_busy(&bcap_dev->buffer_queue))
 822                 return -EBUSY;
 823
 824         /* see if format works */
 825         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
 826         if (ret < 0)
 827                 return ret;
 828
 829         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
 830         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
 831         if (ret < 0)
 832                 return ret;
 833         bcap_dev->fmt = *pixfmt;
 834         bcap_dev->bpp = bcap_fmt.bpp;
 835         bcap_dev->dlen = bcap_fmt.dlen;
 836         return 0;
 837 }
 838
 839 static int bcap_querycap(struct file *file, void  *priv,
 840                                 struct v4l2_capability *cap)
 841 {
 842         struct bcap_device *bcap_dev = video_drvdata(file);
 843
 844         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 845         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
 846         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
 847         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
 848         return 0;
 849 }
 850
 851 static int bcap_g_parm(struct file *file, void *fh,
 852                                 struct v4l2_streamparm *a)
 853 {
 854         struct bcap_device *bcap_dev = video_drvdata(file);
 855
 856         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 857                 return -EINVAL;
 858         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
 859 }
 860
 861 static int bcap_s_parm(struct file *file, void *fh,
 862                                 struct v4l2_streamparm *a)
 863 {
 864         struct bcap_device *bcap_dev = video_drvdata(file);
 865
 866         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 867                 return -EINVAL;
 868         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
 869 }
 870
 871 static int bcap_log_status(struct file *file, void *priv)
 872 {
 873         struct bcap_device *bcap_dev = video_drvdata(file);
 874         /* status for sub devices */
 875         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
 876         return 0;
 877 }
 878
 879 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
 880         .vidioc_querycap         = bcap_querycap,
 881         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
 882         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
 883         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
 884         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
 885         .vidioc_enum_input       = bcap_enum_input,
 886         .vidioc_g_input          = bcap_g_input,
 887         .vidioc_s_input          = bcap_s_input,
 888         .vidioc_querystd         = bcap_querystd,
 889         .vidioc_s_std            = bcap_s_std,
 890         .vidioc_g_std            = bcap_g_std,
 891         .vidioc_s_dv_timings     = bcap_s_dv_timings,
 892         .vidioc_g_dv_timings     = bcap_g_dv_timings,
 893         .vidioc_query_dv_timings = bcap_query_dv_timings,
 894         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
 895         .vidioc_reqbufs          = bcap_reqbufs,
 896         .vidioc_querybuf         = bcap_querybuf,
 897         .vidioc_qbuf             = bcap_qbuf,
 898         .vidioc_dqbuf            = bcap_dqbuf,
 899         .vidioc_streamon         = bcap_streamon,
 900         .vidioc_streamoff        = bcap_streamoff,
 901         .vidioc_g_parm           = bcap_g_parm,
 902         .vidioc_s_parm           = bcap_s_parm,
 903         .vidioc_log_status       = bcap_log_status,
 904 };
 905
 906 static struct v4l2_file_operations bcap_fops = {
 907         .owner = THIS_MODULE,
 908         .open = bcap_open,
 909         .release = bcap_release,
 910         .unlocked_ioctl = video_ioctl2,
 911         .mmap = bcap_mmap,
 912 #ifndef CONFIG_MMU
 913         .get_unmapped_area = bcap_get_unmapped_area,
 914 #endif
 915         .poll = bcap_poll
 916 };
 917
 918 static int bcap_probe(struct platform_device *pdev)
 919 {
 920         struct bcap_device *bcap_dev;
 921         struct video_device *vfd;
 922         struct i2c_adapter *i2c_adap;
 923         struct bfin_capture_config *config;
 924         struct vb2_queue *q;
 925         struct bcap_route *route;
 926         int ret;
 927
 928         config = pdev->dev.platform_data;
 929         if (!config || !config->num_inputs) {
 930                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
 931                 return -ENODEV;
 932         }
 933
 934         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
 935         if (!bcap_dev) {
 936                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
 937                 return -ENOMEM;
 938         }
 939
 940         bcap_dev->cfg = config;
 941
 942         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
 943         if (!bcap_dev->ppi) {
 944                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
 945                 ret = -ENODEV;
 946                 goto err_free_dev;
 947         }
 948         bcap_dev->ppi->priv = bcap_dev;
 949
 950         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 951         if (IS_ERR(bcap_dev->alloc_ctx)) {
 952                 ret = PTR_ERR(bcap_dev->alloc_ctx);
 953                 goto err_free_ppi;
 954         }
 955
 956         vfd = video_device_alloc();
 957         if (!vfd) {
 958                 ret = -ENOMEM;
 959                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
 960                 goto err_cleanup_ctx;
 961         }
 962
 963         /* initialize field of video device */
 964         vfd->release            = video_device_release;
 965         vfd->fops               = &bcap_fops;
 966         vfd->ioctl_ops          = &bcap_ioctl_ops;
 967         vfd->tvnorms            = 0;
 968         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
 969         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
 970         bcap_dev->video_dev     = vfd;
 971
 972         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
 973         if (ret) {
 974                 v4l2_err(pdev->dev.driver,
 975                                 "Unable to register v4l2 device\n");
 976                 goto err_release_vdev;
 977         }
 978         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
 979
 980         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
 981         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
 982         if (ret) {
 983                 v4l2_err(&bcap_dev->v4l2_dev,
 984                                 "Unable to init control handler\n");
 985                 goto err_unreg_v4l2;
 986         }
 987
 988         spin_lock_init(&bcap_dev->lock);
 989         /* initialize queue */
 990         q = &bcap_dev->buffer_queue;
 991         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 992         q->io_modes = VB2_MMAP;
 993         q->drv_priv = bcap_dev;
 994         q->buf_struct_size = sizeof(struct bcap_buffer);
 995         q->ops = &bcap_video_qops;
 996         q->mem_ops = &vb2_dma_contig_memops;
 997         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 998
 999         ret = vb2_queue_init(q);
1000         if (ret)
1001                 goto err_free_handler;
1002
1003         mutex_init(&bcap_dev->mutex);
1004         init_completion(&bcap_dev->comp);
1005
1006         /* init video dma queues */
1007         INIT_LIST_HEAD(&bcap_dev->dma_queue);
1008
1009         vfd->lock = &bcap_dev->mutex;
1010
1011         /* register video device */
1012         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1013         if (ret) {
1014                 v4l2_err(&bcap_dev->v4l2_dev,
1015                                 "Unable to register video device\n");
1016                 goto err_free_handler;
1017         }
1018         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1019         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1020                         video_device_node_name(vfd));
1021
1022         /* load up the subdevice */
1023         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1024         if (!i2c_adap) {
1025                 v4l2_err(&bcap_dev->v4l2_dev,
1026                                 "Unable to find i2c adapter\n");
1027                 ret = -ENODEV;
1028                 goto err_unreg_vdev;
1029
1030         }
1031         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1032                                                  i2c_adap,
1033                                                  &config->board_info,
1034                                                  NULL);
1035         if (bcap_dev->sd) {
1036                 int i;
1037
1038                 /* update tvnorms from the sub devices */
1039                 for (i = 0; i < config->num_inputs; i++)
1040                         vfd->tvnorms |= config->inputs[i].std;
1041         } else {
1042                 v4l2_err(&bcap_dev->v4l2_dev,
1043                                 "Unable to register sub device\n");
1044                 ret = -ENODEV;
1045                 goto err_unreg_vdev;
1046         }
1047
1048         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1049
1050         /*
1051          * explicitly set input, otherwise some boards
1052          * may not work at the state as we expected
1053          */
1054         route = &config->routes[0];
1055         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1056                                 route->input, route->output, 0);
1057         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1058                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1059                 goto err_unreg_vdev;
1060         }
1061         bcap_dev->cur_input = 0;
1062         /* if this route has specific config, update ppi control */
1063         if (route->ppi_control)
1064                 config->ppi_control = route->ppi_control;
1065
1066         /* now we can probe the default state */
1067         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1068                 v4l2_std_id std;
1069                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
1070                 if (ret) {
1071                         v4l2_err(&bcap_dev->v4l2_dev,
1072                                         "Unable to get std\n");
1073                         goto err_unreg_vdev;
1074                 }
1075                 bcap_dev->std = std;
1076         }
1077         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1078                 struct v4l2_dv_timings dv_timings;
1079                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1080                                 g_dv_timings, &dv_timings);
1081                 if (ret) {
1082                         v4l2_err(&bcap_dev->v4l2_dev,
1083                                         "Unable to get dv timings\n");
1084                         goto err_unreg_vdev;
1085                 }
1086                 bcap_dev->dv_timings = dv_timings;
1087         }
1088         ret = bcap_init_sensor_formats(bcap_dev);
1089         if (ret) {
1090                 v4l2_err(&bcap_dev->v4l2_dev,
1091                                 "Unable to create sensor formats table\n");
1092                 goto err_unreg_vdev;
1093         }
1094         return 0;
1095 err_unreg_vdev:
1096         video_unregister_device(bcap_dev->video_dev);
1097         bcap_dev->video_dev = NULL;
1098 err_free_handler:
1099         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1100 err_unreg_v4l2:
1101         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1102 err_release_vdev:
1103         if (bcap_dev->video_dev)
1104                 video_device_release(bcap_dev->video_dev);
1105 err_cleanup_ctx:
1106         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1107 err_free_ppi:
1108         ppi_delete_instance(bcap_dev->ppi);
1109 err_free_dev:
1110         kfree(bcap_dev);
1111         return ret;
1112 }
1113
1114 static int bcap_remove(struct platform_device *pdev)
1115 {
1116         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1117         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1118                                                 struct bcap_device, v4l2_dev);
1119
1120         bcap_free_sensor_formats(bcap_dev);
1121         video_unregister_device(bcap_dev->video_dev);
1122         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1123         v4l2_device_unregister(v4l2_dev);
1124         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1125         ppi_delete_instance(bcap_dev->ppi);
1126         kfree(bcap_dev);
1127         return 0;
1128 }
1129
1130 static struct platform_driver bcap_driver = {
1131         .driver = {
1132                 .name  = CAPTURE_DRV_NAME,
1133                 .owner = THIS_MODULE,
1134         },
1135         .probe = bcap_probe,
1136         .remove = bcap_remove,
1137 };
1138 module_platform_driver(bcap_driver);
1139
1140 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1141 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1142 MODULE_LICENSE("GPL v2");