SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/staging/cx25821/cx25821-video.c

   1 /*
   2  *  Driver for the Conexant CX25821 PCIe bridge
   3  *
   4  *  Copyright (C) 2009 Conexant Systems Inc.
   5  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
   6  *  Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include "cx25821-video.h"
  25
  26 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
  27 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
  28 MODULE_LICENSE("GPL");
  29
  30 static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
  31 static unsigned int radio_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
  32
  33 module_param_array(video_nr, int, NULL, 0444);
  34 module_param_array(radio_nr, int, NULL, 0444);
  35
  36 MODULE_PARM_DESC(video_nr, "video device numbers");
  37 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  38
  39 static unsigned int video_debug = VIDEO_DEBUG;
  40 module_param(video_debug, int, 0644);
  41 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  42
  43 static unsigned int irq_debug;
  44 module_param(irq_debug, int, 0644);
  45 MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");
  46
  47 unsigned int vid_limit = 16;
  48 module_param(vid_limit, int, 0644);
  49 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
  50
  51 static void init_controls(struct cx25821_dev *dev, int chan_num);
  52
  53 #define FORMAT_FLAGS_PACKED       0x01
  54
  55 struct cx25821_fmt formats[] = {
  56         {
  57          .name = "8 bpp, gray",
  58          .fourcc = V4L2_PIX_FMT_GREY,
  59          .depth = 8,
  60          .flags = FORMAT_FLAGS_PACKED,
  61          }, {
  62              .name = "4:1:1, packed, Y41P",
  63              .fourcc = V4L2_PIX_FMT_Y41P,
  64              .depth = 12,
  65              .flags = FORMAT_FLAGS_PACKED,
  66              }, {
  67                  .name = "4:2:2, packed, YUYV",
  68                  .fourcc = V4L2_PIX_FMT_YUYV,
  69                  .depth = 16,
  70                  .flags = FORMAT_FLAGS_PACKED,
  71                  }, {
  72                      .name = "4:2:2, packed, UYVY",
  73                      .fourcc = V4L2_PIX_FMT_UYVY,
  74                      .depth = 16,
  75                      .flags = FORMAT_FLAGS_PACKED,
  76                      }, {
  77                          .name = "4:2:0, YUV",
  78                          .fourcc = V4L2_PIX_FMT_YUV420,
  79                          .depth = 12,
  80                          .flags = FORMAT_FLAGS_PACKED,
  81                          },
  82 };
  83
  84 int get_format_size(void)
  85 {
  86         return ARRAY_SIZE(formats);
  87 }
  88
  89 struct cx25821_fmt *format_by_fourcc(unsigned int fourcc)
  90 {
  91         unsigned int i;
  92
  93         if (fourcc == V4L2_PIX_FMT_Y41P || fourcc == V4L2_PIX_FMT_YUV411P) {
  94                 return formats + 1;
  95         }
  96
  97         for (i = 0; i < ARRAY_SIZE(formats); i++)
  98                 if (formats[i].fourcc == fourcc)
  99                         return formats + i;
 100
 101         printk(KERN_ERR "%s(0x%08x) NOT FOUND\n", __func__, fourcc);
 102         return NULL;
 103 }
 104
 105 void dump_video_queue(struct cx25821_dev *dev, struct cx25821_dmaqueue *q)
 106 {
 107         struct cx25821_buffer *buf;
 108         struct list_head *item;
 109         dprintk(1, "%s()\n", __func__);
 110
 111         if (!list_empty(&q->active)) {
 112                 list_for_each(item, &q->active)
 113                     buf = list_entry(item, struct cx25821_buffer, vb.queue);
 114         }
 115
 116         if (!list_empty(&q->queued)) {
 117                 list_for_each(item, &q->queued)
 118                     buf = list_entry(item, struct cx25821_buffer, vb.queue);
 119         }
 120
 121 }
 122
 123 void cx25821_video_wakeup(struct cx25821_dev *dev, struct cx25821_dmaqueue *q,
 124                           u32 count)
 125 {
 126         struct cx25821_buffer *buf;
 127         int bc;
 128
 129         for (bc = 0;; bc++) {
 130                 if (list_empty(&q->active)) {
 131                         dprintk(1, "bc=%d (=0: active empty)\n", bc);
 132                         break;
 133                 }
 134
 135                 buf =
 136                     list_entry(q->active.next, struct cx25821_buffer, vb.queue);
 137
 138                 /* count comes from the hw and it is 16bit wide --
 139                  * this trick handles wrap-arounds correctly for
 140                  * up to 32767 buffers in flight... */
 141                 if ((s16) (count - buf->count) < 0) {
 142                         break;
 143                 }
 144
 145                 do_gettimeofday(&buf->vb.ts);
 146                 buf->vb.state = VIDEOBUF_DONE;
 147                 list_del(&buf->vb.queue);
 148                 wake_up(&buf->vb.done);
 149         }
 150
 151         if (list_empty(&q->active))
 152                 del_timer(&q->timeout);
 153         else
 154                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 155         if (bc != 1)
 156                 printk(KERN_ERR "%s: %d buffers handled (should be 1)\n",
 157                        __func__, bc);
 158 }
 159
 160 #ifdef TUNER_FLAG
 161 int cx25821_set_tvnorm(struct cx25821_dev *dev, v4l2_std_id norm)
 162 {
 163         dprintk(1, "%s(norm = 0x%08x) name: [%s]\n", __func__,
 164                 (unsigned int)norm, v4l2_norm_to_name(norm));
 165
 166         dev->tvnorm = norm;
 167
 168         /* Tell the internal A/V decoder */
 169         cx25821_call_all(dev, core, s_std, norm);
 170
 171         return 0;
 172 }
 173 #endif
 174
 175 struct video_device *cx25821_vdev_init(struct cx25821_dev *dev,
 176                                        struct pci_dev *pci,
 177                                        struct video_device *template,
 178                                        char *type)
 179 {
 180         struct video_device *vfd;
 181         dprintk(1, "%s()\n", __func__);
 182
 183         vfd = video_device_alloc();
 184         if (NULL == vfd)
 185                 return NULL;
 186         *vfd = *template;
 187         vfd->minor = -1;
 188         vfd->v4l2_dev = &dev->v4l2_dev;
 189         vfd->release = video_device_release;
 190         snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name, type,
 191                  cx25821_boards[dev->board].name);
 192         return vfd;
 193 }
 194
 195 /*
 196 static int cx25821_ctrl_query(struct v4l2_queryctrl *qctrl)
 197 {
 198     int i;
 199
 200     if (qctrl->id < V4L2_CID_BASE || qctrl->id >= V4L2_CID_LASTP1)
 201         return -EINVAL;
 202     for (i = 0; i < CX25821_CTLS; i++)
 203         if (cx25821_ctls[i].v.id == qctrl->id)
 204             break;
 205     if (i == CX25821_CTLS) {
 206         *qctrl = no_ctl;
 207         return 0;
 208     }
 209     *qctrl = cx25821_ctls[i].v;
 210     return 0;
 211 }
 212 */
 213
 214 // resource management
 215 int res_get(struct cx25821_dev *dev, struct cx25821_fh *fh, unsigned int bit)
 216 {
 217         dprintk(1, "%s()\n", __func__);
 218         if (fh->resources & bit)
 219                 /* have it already allocated */
 220                 return 1;
 221
 222         /* is it free? */
 223         mutex_lock(&dev->lock);
 224         if (dev->resources & bit) {
 225                 /* no, someone else uses it */
 226                 mutex_unlock(&dev->lock);
 227                 return 0;
 228         }
 229         /* it's free, grab it */
 230         fh->resources |= bit;
 231         dev->resources |= bit;
 232         dprintk(1, "res: get %d\n", bit);
 233         mutex_unlock(&dev->lock);
 234         return 1;
 235 }
 236
 237 int res_check(struct cx25821_fh *fh, unsigned int bit)
 238 {
 239         return fh->resources & bit;
 240 }
 241
 242 int res_locked(struct cx25821_dev *dev, unsigned int bit)
 243 {
 244         return dev->resources & bit;
 245 }
 246
 247 void res_free(struct cx25821_dev *dev, struct cx25821_fh *fh, unsigned int bits)
 248 {
 249         BUG_ON((fh->resources & bits) != bits);
 250         dprintk(1, "%s()\n", __func__);
 251
 252         mutex_lock(&dev->lock);
 253         fh->resources &= ~bits;
 254         dev->resources &= ~bits;
 255         dprintk(1, "res: put %d\n", bits);
 256         mutex_unlock(&dev->lock);
 257 }
 258
 259 int cx25821_video_mux(struct cx25821_dev *dev, unsigned int input)
 260 {
 261         struct v4l2_routing route;
 262         memset(&route, 0, sizeof(route));
 263
 264         dprintk(1, "%s() video_mux: %d [vmux=%d, gpio=0x%x,0x%x,0x%x,0x%x]\n",
 265                 __func__, input, INPUT(input)->vmux, INPUT(input)->gpio0,
 266                 INPUT(input)->gpio1, INPUT(input)->gpio2, INPUT(input)->gpio3);
 267         dev->input = input;
 268
 269         route.input = INPUT(input)->vmux;
 270
 271         /* Tell the internal A/V decoder */
 272         cx25821_call_all(dev, video, s_routing, INPUT(input)->vmux, 0, 0);
 273
 274         return 0;
 275 }
 276
 277 int cx25821_start_video_dma(struct cx25821_dev *dev,
 278                             struct cx25821_dmaqueue *q,
 279                             struct cx25821_buffer *buf,
 280                             struct sram_channel *channel)
 281 {
 282         int tmp = 0;
 283
 284         /* setup fifo + format */
 285         cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);
 286
 287         /* reset counter */
 288         cx_write(channel->gpcnt_ctl, 3);
 289         q->count = 1;
 290
 291         /* enable irq */
 292         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
 293         cx_set(channel->int_msk, 0x11);
 294
 295         /* start dma */
 296         cx_write(channel->dma_ctl, 0x11);       /* FIFO and RISC enable */
 297
 298         /* make sure upstream setting if any is reversed */
 299         tmp = cx_read(VID_CH_MODE_SEL);
 300         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
 301
 302         return 0;
 303 }
 304
 305 int cx25821_restart_video_queue(struct cx25821_dev *dev,
 306                                 struct cx25821_dmaqueue *q,
 307                                 struct sram_channel *channel)
 308 {
 309         struct cx25821_buffer *buf, *prev;
 310         struct list_head *item;
 311
 312         if (!list_empty(&q->active)) {
 313                 buf =
 314                     list_entry(q->active.next, struct cx25821_buffer, vb.queue);
 315
 316                 cx25821_start_video_dma(dev, q, buf, channel);
 317
 318                 list_for_each(item, &q->active) {
 319                         buf = list_entry(item, struct cx25821_buffer, vb.queue);
 320                         buf->count = q->count++;
 321                 }
 322
 323                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 324                 return 0;
 325         }
 326
 327         prev = NULL;
 328         for (;;) {
 329                 if (list_empty(&q->queued))
 330                         return 0;
 331
 332                 buf =
 333                     list_entry(q->queued.next, struct cx25821_buffer, vb.queue);
 334
 335                 if (NULL == prev) {
 336                         list_move_tail(&buf->vb.queue, &q->active);
 337                         cx25821_start_video_dma(dev, q, buf, channel);
 338                         buf->vb.state = VIDEOBUF_ACTIVE;
 339                         buf->count = q->count++;
 340                         mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 341                 } else if (prev->vb.width == buf->vb.width &&
 342                            prev->vb.height == buf->vb.height &&
 343                            prev->fmt == buf->fmt) {
 344                         list_move_tail(&buf->vb.queue, &q->active);
 345                         buf->vb.state = VIDEOBUF_ACTIVE;
 346                         buf->count = q->count++;
 347                         prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 348                         prev->risc.jmp[2] = cpu_to_le32(0);     /* Bits 63 - 32 */
 349                 } else {
 350                         return 0;
 351                 }
 352                 prev = buf;
 353         }
 354 }
 355
 356 void cx25821_vid_timeout(unsigned long data)
 357 {
 358         struct cx25821_data *timeout_data = (struct cx25821_data *)data;
 359         struct cx25821_dev *dev = timeout_data->dev;
 360         struct sram_channel *channel = timeout_data->channel;
 361         struct cx25821_dmaqueue *q = &dev->vidq[channel->i];
 362         struct cx25821_buffer *buf;
 363         unsigned long flags;
 364
 365         //cx25821_sram_channel_dump(dev, channel);
 366         cx_clear(channel->dma_ctl, 0x11);
 367
 368         spin_lock_irqsave(&dev->slock, flags);
 369         while (!list_empty(&q->active)) {
 370                 buf =
 371                     list_entry(q->active.next, struct cx25821_buffer, vb.queue);
 372                 list_del(&buf->vb.queue);
 373
 374                 buf->vb.state = VIDEOBUF_ERROR;
 375                 wake_up(&buf->vb.done);
 376         }
 377
 378         cx25821_restart_video_queue(dev, q, channel);
 379         spin_unlock_irqrestore(&dev->slock, flags);
 380 }
 381
 382 int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
 383 {
 384         u32 count = 0;
 385         int handled = 0;
 386         u32 mask;
 387         struct sram_channel *channel = &dev->sram_channels[chan_num];
 388
 389         mask = cx_read(channel->int_msk);
 390         if (0 == (status & mask))
 391                 return handled;
 392
 393         cx_write(channel->int_stat, status);
 394
 395         /* risc op code error */
 396         if (status & (1 << 16)) {
 397                 printk(KERN_WARNING "%s, %s: video risc op code error\n",
 398                        dev->name, channel->name);
 399                 cx_clear(channel->dma_ctl, 0x11);
 400                 cx25821_sram_channel_dump(dev, channel);
 401         }
 402
 403         /* risc1 y */
 404         if (status & FLD_VID_DST_RISC1) {
 405                 spin_lock(&dev->slock);
 406                 count = cx_read(channel->gpcnt);
 407                 cx25821_video_wakeup(dev, &dev->vidq[channel->i], count);
 408                 spin_unlock(&dev->slock);
 409                 handled++;
 410         }
 411
 412         /* risc2 y */
 413         if (status & 0x10) {
 414                 dprintk(2, "stopper video\n");
 415                 spin_lock(&dev->slock);
 416                 cx25821_restart_video_queue(dev, &dev->vidq[channel->i],
 417                                             channel);
 418                 spin_unlock(&dev->slock);
 419                 handled++;
 420         }
 421         return handled;
 422 }
 423
 424 void cx25821_videoioctl_unregister(struct cx25821_dev *dev)
 425 {
 426         if (dev->ioctl_dev) {
 427                 if (dev->ioctl_dev->minor != -1)
 428                         video_unregister_device(dev->ioctl_dev);
 429                 else
 430                         video_device_release(dev->ioctl_dev);
 431
 432                 dev->ioctl_dev = NULL;
 433         }
 434 }
 435
 436 void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
 437 {
 438         cx_clear(PCI_INT_MSK, 1);
 439
 440         if (dev->video_dev[chan_num]) {
 441                 if (-1 != dev->video_dev[chan_num]->minor)
 442                         video_unregister_device(dev->video_dev[chan_num]);
 443                 else
 444                         video_device_release(dev->video_dev[chan_num]);
 445
 446                 dev->video_dev[chan_num] = NULL;
 447
 448                 btcx_riscmem_free(dev->pci, &dev->vidq[chan_num].stopper);
 449
 450                 printk(KERN_WARNING "device %d released!\n", chan_num);
 451         }
 452
 453 }
 454
 455 int cx25821_video_register(struct cx25821_dev *dev, int chan_num,
 456                            struct video_device *video_template)
 457 {
 458         int err;
 459
 460         spin_lock_init(&dev->slock);
 461
 462         //printk(KERN_WARNING "Channel %d\n", chan_num);
 463
 464 #ifdef TUNER_FLAG
 465         dev->tvnorm = video_template->current_norm;
 466 #endif
 467
 468         /* init video dma queues */
 469         dev->timeout_data[chan_num].dev = dev;
 470         dev->timeout_data[chan_num].channel = &dev->sram_channels[chan_num];
 471         INIT_LIST_HEAD(&dev->vidq[chan_num].active);
 472         INIT_LIST_HEAD(&dev->vidq[chan_num].queued);
 473         dev->vidq[chan_num].timeout.function = cx25821_vid_timeout;
 474         dev->vidq[chan_num].timeout.data =
 475             (unsigned long)&dev->timeout_data[chan_num];
 476         init_timer(&dev->vidq[chan_num].timeout);
 477         cx25821_risc_stopper(dev->pci, &dev->vidq[chan_num].stopper,
 478                              dev->sram_channels[chan_num].dma_ctl, 0x11, 0);
 479
 480         /* register v4l devices */
 481         dev->video_dev[chan_num] =
 482             cx25821_vdev_init(dev, dev->pci, video_template, "video");
 483         err =
 484             video_register_device(dev->video_dev[chan_num], VFL_TYPE_GRABBER,
 485                                   video_nr[dev->nr]);
 486
 487         if (err < 0) {
 488                 goto fail_unreg;
 489         }
 490         //set PCI interrupt
 491         cx_set(PCI_INT_MSK, 0xff);
 492
 493         /* initial device configuration */
 494         mutex_lock(&dev->lock);
 495 #ifdef TUNER_FLAG
 496         cx25821_set_tvnorm(dev, dev->tvnorm);
 497 #endif
 498         mutex_unlock(&dev->lock);
 499
 500         init_controls(dev, chan_num);
 501
 502         return 0;
 503
 504       fail_unreg:
 505         cx25821_video_unregister(dev, chan_num);
 506         return err;
 507 }
 508
 509 int buffer_setup(struct videobuf_queue *q, unsigned int *count,
 510                  unsigned int *size)
 511 {
 512         struct cx25821_fh *fh = q->priv_data;
 513
 514         *size = fh->fmt->depth * fh->width * fh->height >> 3;
 515
 516         if (0 == *count)
 517                 *count = 32;
 518
 519         while (*size * *count > vid_limit * 1024 * 1024)
 520                 (*count)--;
 521
 522         return 0;
 523 }
 524
 525 int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
 526                    enum v4l2_field field)
 527 {
 528         struct cx25821_fh *fh = q->priv_data;
 529         struct cx25821_dev *dev = fh->dev;
 530         struct cx25821_buffer *buf =
 531             container_of(vb, struct cx25821_buffer, vb);
 532         int rc, init_buffer = 0;
 533         u32 line0_offset, line1_offset;
 534         struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
 535         int bpl_local = LINE_SIZE_D1;
 536         int channel_opened = 0;
 537
 538         BUG_ON(NULL == fh->fmt);
 539         if (fh->width < 48 || fh->width > 720 ||
 540             fh->height < 32 || fh->height > 576)
 541                 return -EINVAL;
 542
 543         buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
 544
 545         if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
 546                 return -EINVAL;
 547
 548         if (buf->fmt != fh->fmt ||
 549             buf->vb.width != fh->width ||
 550             buf->vb.height != fh->height || buf->vb.field != field) {
 551                 buf->fmt = fh->fmt;
 552                 buf->vb.width = fh->width;
 553                 buf->vb.height = fh->height;
 554                 buf->vb.field = field;
 555                 init_buffer = 1;
 556         }
 557
 558         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 559                 init_buffer = 1;
 560                 rc = videobuf_iolock(q, &buf->vb, NULL);
 561                 if (0 != rc) {
 562                         printk(KERN_DEBUG "videobuf_iolock failed!\n");
 563                         goto fail;
 564                 }
 565         }
 566
 567         dprintk(1, "init_buffer=%d\n", init_buffer);
 568
 569         if (init_buffer) {
 570
 571                 channel_opened = dev->channel_opened;
 572                 channel_opened = (channel_opened < 0
 573                                   || channel_opened > 7) ? 7 : channel_opened;
 574
 575                 if (dev->pixel_formats[channel_opened] == PIXEL_FRMT_411)
 576                         buf->bpl = (buf->fmt->depth * buf->vb.width) >> 3;
 577                 else
 578                         buf->bpl = (buf->fmt->depth >> 3) * (buf->vb.width);
 579
 580                 if (dev->pixel_formats[channel_opened] == PIXEL_FRMT_411) {
 581                         bpl_local = buf->bpl;
 582                 } else {
 583                         bpl_local = buf->bpl;   //Default
 584
 585                         if (channel_opened >= 0 && channel_opened <= 7) {
 586                                 if (dev->use_cif_resolution[channel_opened]) {
 587                                         if (dev->tvnorm & V4L2_STD_PAL_BG
 588                                             || dev->tvnorm & V4L2_STD_PAL_DK)
 589                                                 bpl_local = 352 << 1;
 590                                         else
 591                                                 bpl_local =
 592                                                     dev->
 593                                                     cif_width[channel_opened] <<
 594                                                     1;
 595                                 }
 596                         }
 597                 }
 598
 599                 switch (buf->vb.field) {
 600                 case V4L2_FIELD_TOP:
 601                         cx25821_risc_buffer(dev->pci, &buf->risc,
 602                                             dma->sglist, 0, UNSET,
 603                                             buf->bpl, 0, buf->vb.height);
 604                         break;
 605                 case V4L2_FIELD_BOTTOM:
 606                         cx25821_risc_buffer(dev->pci, &buf->risc,
 607                                             dma->sglist, UNSET, 0,
 608                                             buf->bpl, 0, buf->vb.height);
 609                         break;
 610                 case V4L2_FIELD_INTERLACED:
 611                         /* All other formats are top field first */
 612                         line0_offset = 0;
 613                         line1_offset = buf->bpl;
 614                         dprintk(1, "top field first\n");
 615
 616                         cx25821_risc_buffer(dev->pci, &buf->risc,
 617                                             dma->sglist, line0_offset,
 618                                             bpl_local, bpl_local, bpl_local,
 619                                             buf->vb.height >> 1);
 620                         break;
 621                 case V4L2_FIELD_SEQ_TB:
 622                         cx25821_risc_buffer(dev->pci, &buf->risc,
 623                                             dma->sglist,
 624                                             0, buf->bpl * (buf->vb.height >> 1),
 625                                             buf->bpl, 0, buf->vb.height >> 1);
 626                         break;
 627                 case V4L2_FIELD_SEQ_BT:
 628                         cx25821_risc_buffer(dev->pci, &buf->risc,
 629                                             dma->sglist,
 630                                             buf->bpl * (buf->vb.height >> 1), 0,
 631                                             buf->bpl, 0, buf->vb.height >> 1);
 632                         break;
 633                 default:
 634                         BUG();
 635                 }
 636         }
 637
 638         dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
 639                 buf, buf->vb.i, fh->width, fh->height, fh->fmt->depth,
 640                 fh->fmt->name, (unsigned long)buf->risc.dma);
 641
 642         buf->vb.state = VIDEOBUF_PREPARED;
 643
 644         return 0;
 645
 646       fail:
 647         cx25821_free_buffer(q, buf);
 648         return rc;
 649 }
 650
 651 void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
 652 {
 653         struct cx25821_buffer *buf =
 654             container_of(vb, struct cx25821_buffer, vb);
 655
 656         cx25821_free_buffer(q, buf);
 657 }
 658
 659 struct videobuf_queue *get_queue(struct cx25821_fh *fh)
 660 {
 661         switch (fh->type) {
 662         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 663                 return &fh->vidq;
 664         default:
 665                 BUG();
 666                 return NULL;
 667         }
 668 }
 669
 670 int get_resource(struct cx25821_fh *fh, int resource)
 671 {
 672         switch (fh->type) {
 673         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 674                 return resource;
 675         default:
 676                 BUG();
 677                 return 0;
 678         }
 679 }
 680
 681 int video_mmap(struct file *file, struct vm_area_struct *vma)
 682 {
 683         struct cx25821_fh *fh = file->private_data;
 684
 685         return videobuf_mmap_mapper(get_queue(fh), vma);
 686 }
 687
 688 /* VIDEO IOCTLS                                                       */
 689 int vidioc_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
 690 {
 691         struct cx25821_fh *fh = priv;
 692
 693         f->fmt.pix.width = fh->width;
 694         f->fmt.pix.height = fh->height;
 695         f->fmt.pix.field = fh->vidq.field;
 696         f->fmt.pix.pixelformat = fh->fmt->fourcc;
 697         f->fmt.pix.bytesperline = (f->fmt.pix.width * fh->fmt->depth) >> 3;
 698         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 699
 700         return 0;
 701 }
 702
 703 int vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
 704 {
 705         struct cx25821_fmt *fmt;
 706         enum v4l2_field field;
 707         unsigned int maxw, maxh;
 708
 709         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 710         if (NULL == fmt)
 711                 return -EINVAL;
 712
 713         field = f->fmt.pix.field;
 714         maxw = 720;
 715         maxh = 576;
 716
 717         if (V4L2_FIELD_ANY == field) {
 718                 field = (f->fmt.pix.height > maxh / 2)
 719                     ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
 720         }
 721
 722         switch (field) {
 723         case V4L2_FIELD_TOP:
 724         case V4L2_FIELD_BOTTOM:
 725                 maxh = maxh / 2;
 726                 break;
 727         case V4L2_FIELD_INTERLACED:
 728                 break;
 729         default:
 730                 return -EINVAL;
 731         }
 732
 733         f->fmt.pix.field = field;
 734         if (f->fmt.pix.height < 32)
 735                 f->fmt.pix.height = 32;
 736         if (f->fmt.pix.height > maxh)
 737                 f->fmt.pix.height = maxh;
 738         if (f->fmt.pix.width < 48)
 739                 f->fmt.pix.width = 48;
 740         if (f->fmt.pix.width > maxw)
 741                 f->fmt.pix.width = maxw;
 742         f->fmt.pix.width &= ~0x03;
 743         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 744         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 745
 746         return 0;
 747 }
 748
 749 int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap)
 750 {
 751         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 752
 753         strcpy(cap->driver, "cx25821");
 754         strlcpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
 755         sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
 756         cap->version = CX25821_VERSION_CODE;
 757         cap->capabilities =
 758             V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 759         if (UNSET != dev->tuner_type)
 760                 cap->capabilities |= V4L2_CAP_TUNER;
 761         return 0;
 762 }
 763
 764 int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 765                             struct v4l2_fmtdesc *f)
 766 {
 767         if (unlikely(f->index >= ARRAY_SIZE(formats)))
 768                 return -EINVAL;
 769
 770         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
 771         f->pixelformat = formats[f->index].fourcc;
 772
 773         return 0;
 774 }
 775
 776 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 777 int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
 778 {
 779         struct cx25821_fh *fh = priv;
 780         struct videobuf_queue *q;
 781         struct v4l2_requestbuffers req;
 782         unsigned int i;
 783         int err;
 784
 785         q = get_queue(fh);
 786         memset(&req, 0, sizeof(req));
 787         req.type = q->type;
 788         req.count = 8;
 789         req.memory = V4L2_MEMORY_MMAP;
 790         err = videobuf_reqbufs(q, &req);
 791         if (err < 0)
 792                 return err;
 793
 794         mbuf->frames = req.count;
 795         mbuf->size = 0;
 796         for (i = 0; i < mbuf->frames; i++) {
 797                 mbuf->offsets[i] = q->bufs[i]->boff;
 798                 mbuf->size += q->bufs[i]->bsize;
 799         }
 800         return 0;
 801 }
 802 #endif
 803
 804 int vidioc_reqbufs(struct file *file, void *priv, struct v4l2_requestbuffers *p)
 805 {
 806         struct cx25821_fh *fh = priv;
 807         return videobuf_reqbufs(get_queue(fh), p);
 808 }
 809
 810 int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
 811 {
 812         struct cx25821_fh *fh = priv;
 813         return videobuf_querybuf(get_queue(fh), p);
 814 }
 815
 816 int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 817 {
 818         struct cx25821_fh *fh = priv;
 819         return videobuf_qbuf(get_queue(fh), p);
 820 }
 821
 822 int vidioc_g_priority(struct file *file, void *f, enum v4l2_priority *p)
 823 {
 824         struct cx25821_dev *dev = ((struct cx25821_fh *)f)->dev;
 825
 826         *p = v4l2_prio_max(&dev->prio);
 827
 828         return 0;
 829 }
 830
 831 int vidioc_s_priority(struct file *file, void *f, enum v4l2_priority prio)
 832 {
 833         struct cx25821_fh *fh = f;
 834         struct cx25821_dev *dev = ((struct cx25821_fh *)f)->dev;
 835
 836         return v4l2_prio_change(&dev->prio, &fh->prio, prio);
 837 }
 838
 839 #ifdef TUNER_FLAG
 840 int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * tvnorms)
 841 {
 842         struct cx25821_fh *fh = priv;
 843         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 844         int err;
 845
 846         dprintk(1, "%s()\n", __func__);
 847
 848         if (fh) {
 849                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 850                 if (0 != err)
 851                         return err;
 852         }
 853
 854         if (dev->tvnorm == *tvnorms) {
 855                 return 0;
 856         }
 857
 858         mutex_lock(&dev->lock);
 859         cx25821_set_tvnorm(dev, *tvnorms);
 860         mutex_unlock(&dev->lock);
 861
 862         medusa_set_videostandard(dev);
 863
 864         return 0;
 865 }
 866 #endif
 867
 868 int cx25821_enum_input(struct cx25821_dev *dev, struct v4l2_input *i)
 869 {
 870         static const char *iname[] = {
 871                 [CX25821_VMUX_COMPOSITE] = "Composite",
 872                 [CX25821_VMUX_SVIDEO] = "S-Video",
 873                 [CX25821_VMUX_DEBUG] = "for debug only",
 874         };
 875         unsigned int n;
 876         dprintk(1, "%s()\n", __func__);
 877
 878         n = i->index;
 879         if (n > 2)
 880                 return -EINVAL;
 881
 882         if (0 == INPUT(n)->type)
 883                 return -EINVAL;
 884
 885         memset(i, 0, sizeof(*i));
 886         i->index = n;
 887         i->type = V4L2_INPUT_TYPE_CAMERA;
 888         strcpy(i->name, iname[INPUT(n)->type]);
 889
 890         i->std = CX25821_NORMS;
 891         return 0;
 892 }
 893
 894 int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *i)
 895 {
 896         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 897         dprintk(1, "%s()\n", __func__);
 898         return cx25821_enum_input(dev, i);
 899 }
 900
 901 int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 902 {
 903         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 904
 905         *i = dev->input;
 906         dprintk(1, "%s() returns %d\n", __func__, *i);
 907         return 0;
 908 }
 909
 910 int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 911 {
 912         struct cx25821_fh *fh = priv;
 913         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 914         int err;
 915
 916         dprintk(1, "%s(%d)\n", __func__, i);
 917
 918         if (fh) {
 919                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 920                 if (0 != err)
 921                         return err;
 922         }
 923
 924         if (i > 2) {
 925                 dprintk(1, "%s() -EINVAL\n", __func__);
 926                 return -EINVAL;
 927         }
 928
 929         mutex_lock(&dev->lock);
 930         cx25821_video_mux(dev, i);
 931         mutex_unlock(&dev->lock);
 932         return 0;
 933 }
 934
 935 #ifdef TUNER_FLAG
 936 int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f)
 937 {
 938         struct cx25821_fh *fh = priv;
 939         struct cx25821_dev *dev = fh->dev;
 940
 941         f->frequency = dev->freq;
 942
 943         cx25821_call_all(dev, tuner, g_frequency, f);
 944
 945         return 0;
 946 }
 947
 948 int cx25821_set_freq(struct cx25821_dev *dev, struct v4l2_frequency *f)
 949 {
 950         mutex_lock(&dev->lock);
 951         dev->freq = f->frequency;
 952
 953         cx25821_call_all(dev, tuner, s_frequency, f);
 954
 955         /* When changing channels it is required to reset TVAUDIO */
 956         msleep(10);
 957
 958         mutex_unlock(&dev->lock);
 959
 960         return 0;
 961 }
 962
 963 int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f)
 964 {
 965         struct cx25821_fh *fh = priv;
 966         struct cx25821_dev *dev = fh->dev;
 967         int err;
 968
 969         if (fh) {
 970                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 971                 if (0 != err)
 972                         return err;
 973         }
 974
 975         return cx25821_set_freq(dev, f);
 976 }
 977 #endif
 978
 979 #ifdef CONFIG_VIDEO_ADV_DEBUG
 980 int vidioc_g_register(struct file *file, void *fh,
 981                       struct v4l2_dbg_register *reg)
 982 {
 983         struct cx25821_dev *dev = ((struct cx25821_fh *)fh)->dev;
 984
 985         if (!v4l2_chip_match_host(&reg->match))
 986                 return -EINVAL;
 987
 988         cx25821_call_all(dev, core, g_register, reg);
 989
 990         return 0;
 991 }
 992
 993 int vidioc_s_register(struct file *file, void *fh,
 994                       struct v4l2_dbg_register *reg)
 995 {
 996         struct cx25821_dev *dev = ((struct cx25821_fh *)fh)->dev;
 997
 998         if (!v4l2_chip_match_host(&reg->match))
 999                 return -EINVAL;
1000
1001         cx25821_call_all(dev, core, s_register, reg);
1002
1003         return 0;
1004 }
1005
1006 #endif
1007
1008 #ifdef TUNER_FLAG
1009 int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1010 {
1011         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1012
1013         if (unlikely(UNSET == dev->tuner_type))
1014                 return -EINVAL;
1015         if (0 != t->index)
1016                 return -EINVAL;
1017
1018         strcpy(t->name, "Television");
1019         t->type = V4L2_TUNER_ANALOG_TV;
1020         t->capability = V4L2_TUNER_CAP_NORM;
1021         t->rangehigh = 0xffffffffUL;
1022
1023         t->signal = 0xffff;     /* LOCKED */
1024         return 0;
1025 }
1026
1027 int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1028 {
1029         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1030         struct cx25821_fh *fh = priv;
1031         int err;
1032
1033         if (fh) {
1034                 err = v4l2_prio_check(&dev->prio, &fh->prio);
1035                 if (0 != err)
1036                         return err;
1037         }
1038
1039         dprintk(1, "%s()\n", __func__);
1040         if (UNSET == dev->tuner_type)
1041                 return -EINVAL;
1042         if (0 != t->index)
1043                 return -EINVAL;
1044
1045         return 0;
1046 }
1047
1048 #endif
1049 // ******************************************************************************************
1050 static const struct v4l2_queryctrl no_ctl = {
1051         .name = "42",
1052         .flags = V4L2_CTRL_FLAG_DISABLED,
1053 };
1054
1055 static struct v4l2_queryctrl cx25821_ctls[] = {
1056         /* --- video --- */
1057         {
1058          .id = V4L2_CID_BRIGHTNESS,
1059          .name = "Brightness",
1060          .minimum = 0,
1061          .maximum = 10000,
1062          .step = 1,
1063          .default_value = 6200,
1064          .type = V4L2_CTRL_TYPE_INTEGER,
1065          }, {
1066              .id = V4L2_CID_CONTRAST,
1067              .name = "Contrast",
1068              .minimum = 0,
1069              .maximum = 10000,
1070              .step = 1,
1071              .default_value = 5000,
1072              .type = V4L2_CTRL_TYPE_INTEGER,
1073              }, {
1074                  .id = V4L2_CID_SATURATION,
1075                  .name = "Saturation",
1076                  .minimum = 0,
1077                  .maximum = 10000,
1078                  .step = 1,
1079                  .default_value = 5000,
1080                  .type = V4L2_CTRL_TYPE_INTEGER,
1081                  }, {
1082                      .id = V4L2_CID_HUE,
1083                      .name = "Hue",
1084                      .minimum = 0,
1085                      .maximum = 10000,
1086                      .step = 1,
1087                      .default_value = 5000,
1088                      .type = V4L2_CTRL_TYPE_INTEGER,
1089                      }
1090 };
1091 static const int CX25821_CTLS = ARRAY_SIZE(cx25821_ctls);
1092
1093 static int cx25821_ctrl_query(struct v4l2_queryctrl *qctrl)
1094 {
1095         int i;
1096
1097         if (qctrl->id < V4L2_CID_BASE || qctrl->id >= V4L2_CID_LASTP1)
1098                 return -EINVAL;
1099         for (i = 0; i < CX25821_CTLS; i++)
1100                 if (cx25821_ctls[i].id == qctrl->id)
1101                         break;
1102         if (i == CX25821_CTLS) {
1103                 *qctrl = no_ctl;
1104                 return 0;
1105         }
1106         *qctrl = cx25821_ctls[i];
1107         return 0;
1108 }
1109
1110 int vidioc_queryctrl(struct file *file, void *priv,
1111                      struct v4l2_queryctrl *qctrl)
1112 {
1113         return cx25821_ctrl_query(qctrl);
1114 }
1115
1116 /* ------------------------------------------------------------------ */
1117 /* VIDEO CTRL IOCTLS                                                  */
1118
1119 static const struct v4l2_queryctrl *ctrl_by_id(unsigned int id)
1120 {
1121         unsigned int i;
1122
1123         for (i = 0; i < CX25821_CTLS; i++)
1124                 if (cx25821_ctls[i].id == id)
1125                         return cx25821_ctls + i;
1126         return NULL;
1127 }
1128
1129 int vidioc_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctl)
1130 {
1131         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1132
1133         const struct v4l2_queryctrl *ctrl;
1134
1135         ctrl = ctrl_by_id(ctl->id);
1136
1137         if (NULL == ctrl)
1138                 return -EINVAL;
1139         switch (ctl->id) {
1140         case V4L2_CID_BRIGHTNESS:
1141                 ctl->value = dev->ctl_bright;
1142                 break;
1143         case V4L2_CID_HUE:
1144                 ctl->value = dev->ctl_hue;
1145                 break;
1146         case V4L2_CID_CONTRAST:
1147                 ctl->value = dev->ctl_contrast;
1148                 break;
1149         case V4L2_CID_SATURATION:
1150                 ctl->value = dev->ctl_saturation;
1151                 break;
1152         }
1153         return 0;
1154 }
1155
1156 int cx25821_set_control(struct cx25821_dev *dev,
1157                         struct v4l2_control *ctl, int chan_num)
1158 {
1159         int err;
1160         const struct v4l2_queryctrl *ctrl;
1161
1162         err = -EINVAL;
1163
1164         ctrl = ctrl_by_id(ctl->id);
1165
1166         if (NULL == ctrl)
1167                 return err;
1168
1169         switch (ctrl->type) {
1170         case V4L2_CTRL_TYPE_BOOLEAN:
1171         case V4L2_CTRL_TYPE_MENU:
1172         case V4L2_CTRL_TYPE_INTEGER:
1173                 if (ctl->value < ctrl->minimum)
1174                         ctl->value = ctrl->minimum;
1175                 if (ctl->value > ctrl->maximum)
1176                         ctl->value = ctrl->maximum;
1177                 break;
1178         default:
1179                 /* nothing */ ;
1180         };
1181
1182         switch (ctl->id) {
1183         case V4L2_CID_BRIGHTNESS:
1184                 dev->ctl_bright = ctl->value;
1185                 medusa_set_brightness(dev, ctl->value, chan_num);
1186                 break;
1187         case V4L2_CID_HUE:
1188                 dev->ctl_hue = ctl->value;
1189                 medusa_set_hue(dev, ctl->value, chan_num);
1190                 break;
1191         case V4L2_CID_CONTRAST:
1192                 dev->ctl_contrast = ctl->value;
1193                 medusa_set_contrast(dev, ctl->value, chan_num);
1194                 break;
1195         case V4L2_CID_SATURATION:
1196                 dev->ctl_saturation = ctl->value;
1197                 medusa_set_saturation(dev, ctl->value, chan_num);
1198                 break;
1199         }
1200
1201         err = 0;
1202
1203         return err;
1204 }
1205
1206 static void init_controls(struct cx25821_dev *dev, int chan_num)
1207 {
1208         struct v4l2_control ctrl;
1209         int i;
1210         for (i = 0; i < CX25821_CTLS; i++) {
1211                 ctrl.id = cx25821_ctls[i].id;
1212                 ctrl.value = cx25821_ctls[i].default_value;
1213
1214                 cx25821_set_control(dev, &ctrl, chan_num);
1215         }
1216 }
1217
1218 int vidioc_cropcap(struct file *file, void *priv, struct v4l2_cropcap *cropcap)
1219 {
1220         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1221
1222         if (cropcap->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1223                 return -EINVAL;
1224         cropcap->bounds.top = cropcap->bounds.left = 0;
1225         cropcap->bounds.width = 720;
1226         cropcap->bounds.height = dev->tvnorm == V4L2_STD_PAL_BG ? 576 : 480;
1227         cropcap->pixelaspect.numerator =
1228             dev->tvnorm == V4L2_STD_PAL_BG ? 59 : 10;
1229         cropcap->pixelaspect.denominator =
1230             dev->tvnorm == V4L2_STD_PAL_BG ? 54 : 11;
1231         cropcap->defrect = cropcap->bounds;
1232         return 0;
1233 }
1234
1235 int vidioc_s_crop(struct file *file, void *priv, struct v4l2_crop *crop)
1236 {
1237         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1238         struct cx25821_fh *fh = priv;
1239         int err;
1240
1241         if (fh) {
1242                 err = v4l2_prio_check(&dev->prio, &fh->prio);
1243                 if (0 != err)
1244                         return err;
1245         }
1246         // vidioc_s_crop not supported
1247         return -EINVAL;
1248 }
1249
1250 int vidioc_g_crop(struct file *file, void *priv, struct v4l2_crop *crop)
1251 {
1252         // vidioc_g_crop not supported
1253         return -EINVAL;
1254 }
1255
1256 int vidioc_querystd(struct file *file, void *priv, v4l2_std_id * norm)
1257 {
1258         // medusa does not support video standard sensing of current input
1259         *norm = CX25821_NORMS;
1260
1261         return 0;
1262 }
1263
1264 int is_valid_width(u32 width, v4l2_std_id tvnorm)
1265 {
1266         if (tvnorm == V4L2_STD_PAL_BG) {
1267                 if (width == 352 || width == 720)
1268                         return 1;
1269                 else
1270                         return 0;
1271         }
1272
1273         if (tvnorm == V4L2_STD_NTSC_M) {
1274                 if (width == 320 || width == 352 || width == 720)
1275                         return 1;
1276                 else
1277                         return 0;
1278         }
1279         return 0;
1280 }
1281
1282 int is_valid_height(u32 height, v4l2_std_id tvnorm)
1283 {
1284         if (tvnorm == V4L2_STD_PAL_BG) {
1285                 if (height == 576 || height == 288)
1286                         return 1;
1287                 else
1288                         return 0;
1289         }
1290
1291         if (tvnorm == V4L2_STD_NTSC_M) {
1292                 if (height == 480 || height == 240)
1293                         return 1;
1294                 else
1295                         return 0;
1296         }
1297
1298         return 0;
1299 }