drivers/media/pci/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  *  Parts adapted/taken from Eduardo Moscoso Rubino
   8  *  Copyright (C) 2009 Eduardo Moscoso Rubino <moscoso@TopoLogica.com>
   9  *
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #include "cx25821-video.h"
  30
  31 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
  32 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
  33 MODULE_LICENSE("GPL");
  34
  35 static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
  36
  37 module_param_array(video_nr, int, NULL, 0444);
  38
  39 MODULE_PARM_DESC(video_nr, "video device numbers");
  40
  41 static unsigned int video_debug = VIDEO_DEBUG;
  42 module_param(video_debug, int, 0644);
  43 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  44
  45 static unsigned int irq_debug;
  46 module_param(irq_debug, int, 0644);
  47 MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");
  48
  49 static unsigned int vid_limit = 16;
  50 module_param(vid_limit, int, 0644);
  51 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
  52
  53 #define FORMAT_FLAGS_PACKED       0x01
  54
  55 static const struct cx25821_fmt formats[] = {
  56         {
  57                 .name = "4:1:1, packed, Y41P",
  58                 .fourcc = V4L2_PIX_FMT_Y41P,
  59                 .depth = 12,
  60                 .flags = FORMAT_FLAGS_PACKED,
  61         }, {
  62                 .name = "4:2:2, packed, YUYV",
  63                 .fourcc = V4L2_PIX_FMT_YUYV,
  64                 .depth = 16,
  65                 .flags = FORMAT_FLAGS_PACKED,
  66         },
  67 };
  68
  69 static const struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc)
  70 {
  71         unsigned int i;
  72
  73         for (i = 0; i < ARRAY_SIZE(formats); i++)
  74                 if (formats[i].fourcc == fourcc)
  75                         return formats + i;
  76         return NULL;
  77 }
  78
  79 void cx25821_video_wakeup(struct cx25821_dev *dev, struct cx25821_dmaqueue *q,
  80                           u32 count)
  81 {
  82         struct cx25821_buffer *buf;
  83         int bc;
  84
  85         for (bc = 0;; bc++) {
  86                 if (list_empty(&q->active)) {
  87                         dprintk(1, "bc=%d (=0: active empty)\n", bc);
  88                         break;
  89                 }
  90
  91                 buf = list_entry(q->active.next, struct cx25821_buffer,
  92                                 vb.queue);
  93
  94                 /* count comes from the hw and it is 16bit wide --
  95                  * this trick handles wrap-arounds correctly for
  96                  * up to 32767 buffers in flight... */
  97                 if ((s16) (count - buf->count) < 0)
  98                         break;
  99
 100                 v4l2_get_timestamp(&buf->vb.ts);
 101                 buf->vb.state = VIDEOBUF_DONE;
 102                 list_del(&buf->vb.queue);
 103                 wake_up(&buf->vb.done);
 104         }
 105
 106         if (list_empty(&q->active))
 107                 del_timer(&q->timeout);
 108         else
 109                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 110         if (bc != 1)
 111                 pr_err("%s: %d buffers handled (should be 1)\n", __func__, bc);
 112 }
 113
 114 int cx25821_start_video_dma(struct cx25821_dev *dev,
 115                             struct cx25821_dmaqueue *q,
 116                             struct cx25821_buffer *buf,
 117                             const struct sram_channel *channel)
 118 {
 119         int tmp = 0;
 120
 121         /* setup fifo + format */
 122         cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);
 123
 124         /* reset counter */
 125         cx_write(channel->gpcnt_ctl, 3);
 126         q->count = 1;
 127
 128         /* enable irq */
 129         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
 130         cx_set(channel->int_msk, 0x11);
 131
 132         /* start dma */
 133         cx_write(channel->dma_ctl, 0x11);       /* FIFO and RISC enable */
 134
 135         /* make sure upstream setting if any is reversed */
 136         tmp = cx_read(VID_CH_MODE_SEL);
 137         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
 138
 139         return 0;
 140 }
 141
 142 static int cx25821_restart_video_queue(struct cx25821_dev *dev,
 143                                        struct cx25821_dmaqueue *q,
 144                                        const struct sram_channel *channel)
 145 {
 146         struct cx25821_buffer *buf, *prev;
 147         struct list_head *item;
 148
 149         if (!list_empty(&q->active)) {
 150                 buf = list_entry(q->active.next, struct cx25821_buffer,
 151                                 vb.queue);
 152
 153                 cx25821_start_video_dma(dev, q, buf, channel);
 154
 155                 list_for_each(item, &q->active) {
 156                         buf = list_entry(item, struct cx25821_buffer, vb.queue);
 157                         buf->count = q->count++;
 158                 }
 159
 160                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 161                 return 0;
 162         }
 163
 164         prev = NULL;
 165         for (;;) {
 166                 if (list_empty(&q->queued))
 167                         return 0;
 168
 169                 buf = list_entry(q->queued.next, struct cx25821_buffer,
 170                                 vb.queue);
 171
 172                 if (NULL == prev) {
 173                         list_move_tail(&buf->vb.queue, &q->active);
 174                         cx25821_start_video_dma(dev, q, buf, channel);
 175                         buf->vb.state = VIDEOBUF_ACTIVE;
 176                         buf->count = q->count++;
 177                         mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 178                 } else if (prev->vb.width == buf->vb.width &&
 179                            prev->vb.height == buf->vb.height &&
 180                            prev->fmt == buf->fmt) {
 181                         list_move_tail(&buf->vb.queue, &q->active);
 182                         buf->vb.state = VIDEOBUF_ACTIVE;
 183                         buf->count = q->count++;
 184                         prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 185                         prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63 - 32 */
 186                 } else {
 187                         return 0;
 188                 }
 189                 prev = buf;
 190         }
 191 }
 192
 193 static void cx25821_vid_timeout(unsigned long data)
 194 {
 195         struct cx25821_data *timeout_data = (struct cx25821_data *)data;
 196         struct cx25821_dev *dev = timeout_data->dev;
 197         const struct sram_channel *channel = timeout_data->channel;
 198         struct cx25821_dmaqueue *q = &dev->channels[channel->i].dma_vidq;
 199         struct cx25821_buffer *buf;
 200         unsigned long flags;
 201
 202         /* cx25821_sram_channel_dump(dev, channel); */
 203         cx_clear(channel->dma_ctl, 0x11);
 204
 205         spin_lock_irqsave(&dev->slock, flags);
 206         while (!list_empty(&q->active)) {
 207                 buf = list_entry(q->active.next, struct cx25821_buffer,
 208                                 vb.queue);
 209                 list_del(&buf->vb.queue);
 210
 211                 buf->vb.state = VIDEOBUF_ERROR;
 212                 wake_up(&buf->vb.done);
 213         }
 214
 215         cx25821_restart_video_queue(dev, q, channel);
 216         spin_unlock_irqrestore(&dev->slock, flags);
 217 }
 218
 219 int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
 220 {
 221         u32 count = 0;
 222         int handled = 0;
 223         u32 mask;
 224         const struct sram_channel *channel = dev->channels[chan_num].sram_channels;
 225
 226         mask = cx_read(channel->int_msk);
 227         if (0 == (status & mask))
 228                 return handled;
 229
 230         cx_write(channel->int_stat, status);
 231
 232         /* risc op code error */
 233         if (status & (1 << 16)) {
 234                 pr_warn("%s, %s: video risc op code error\n",
 235                         dev->name, channel->name);
 236                 cx_clear(channel->dma_ctl, 0x11);
 237                 cx25821_sram_channel_dump(dev, channel);
 238         }
 239
 240         /* risc1 y */
 241         if (status & FLD_VID_DST_RISC1) {
 242                 spin_lock(&dev->slock);
 243                 count = cx_read(channel->gpcnt);
 244                 cx25821_video_wakeup(dev, &dev->channels[channel->i].dma_vidq,
 245                                 count);
 246                 spin_unlock(&dev->slock);
 247                 handled++;
 248         }
 249
 250         /* risc2 y */
 251         if (status & 0x10) {
 252                 dprintk(2, "stopper video\n");
 253                 spin_lock(&dev->slock);
 254                 cx25821_restart_video_queue(dev,
 255                                 &dev->channels[channel->i].dma_vidq, channel);
 256                 spin_unlock(&dev->slock);
 257                 handled++;
 258         }
 259         return handled;
 260 }
 261
 262 static int cx25821_buffer_setup(struct videobuf_queue *q, unsigned int *count,
 263                  unsigned int *size)
 264 {
 265         struct cx25821_channel *chan = q->priv_data;
 266
 267         *size = chan->fmt->depth * chan->width * chan->height >> 3;
 268
 269         if (0 == *count)
 270                 *count = 32;
 271
 272         if (*size * *count > vid_limit * 1024 * 1024)
 273                 *count = (vid_limit * 1024 * 1024) / *size;
 274
 275         return 0;
 276 }
 277
 278 static int cx25821_buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
 279                    enum v4l2_field field)
 280 {
 281         struct cx25821_channel *chan = q->priv_data;
 282         struct cx25821_dev *dev = chan->dev;
 283         struct cx25821_buffer *buf =
 284                 container_of(vb, struct cx25821_buffer, vb);
 285         int rc, init_buffer = 0;
 286         u32 line0_offset;
 287         struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
 288         int bpl_local = LINE_SIZE_D1;
 289
 290         BUG_ON(NULL == chan->fmt);
 291         if (chan->width < 48 || chan->width > 720 ||
 292             chan->height < 32 || chan->height > 576)
 293                 return -EINVAL;
 294
 295         buf->vb.size = (chan->width * chan->height * chan->fmt->depth) >> 3;
 296
 297         if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
 298                 return -EINVAL;
 299
 300         if (buf->fmt != chan->fmt ||
 301             buf->vb.width != chan->width ||
 302             buf->vb.height != chan->height || buf->vb.field != field) {
 303                 buf->fmt = chan->fmt;
 304                 buf->vb.width = chan->width;
 305                 buf->vb.height = chan->height;
 306                 buf->vb.field = field;
 307                 init_buffer = 1;
 308         }
 309
 310         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 311                 init_buffer = 1;
 312                 rc = videobuf_iolock(q, &buf->vb, NULL);
 313                 if (0 != rc) {
 314                         printk(KERN_DEBUG pr_fmt("videobuf_iolock failed!\n"));
 315                         goto fail;
 316                 }
 317         }
 318
 319         dprintk(1, "init_buffer=%d\n", init_buffer);
 320
 321         if (init_buffer) {
 322                 if (chan->pixel_formats == PIXEL_FRMT_411)
 323                         buf->bpl = (buf->fmt->depth * buf->vb.width) >> 3;
 324                 else
 325                         buf->bpl = (buf->fmt->depth >> 3) * (buf->vb.width);
 326
 327                 if (chan->pixel_formats == PIXEL_FRMT_411) {
 328                         bpl_local = buf->bpl;
 329                 } else {
 330                         bpl_local = buf->bpl;   /* Default */
 331
 332                         if (chan->use_cif_resolution) {
 333                                 if (dev->tvnorm & V4L2_STD_625_50)
 334                                         bpl_local = 352 << 1;
 335                                 else
 336                                         bpl_local = chan->cif_width << 1;
 337                         }
 338                 }
 339
 340                 switch (buf->vb.field) {
 341                 case V4L2_FIELD_TOP:
 342                         cx25821_risc_buffer(dev->pci, &buf->risc,
 343                                             dma->sglist, 0, UNSET,
 344                                             buf->bpl, 0, buf->vb.height);
 345                         break;
 346                 case V4L2_FIELD_BOTTOM:
 347                         cx25821_risc_buffer(dev->pci, &buf->risc,
 348                                             dma->sglist, UNSET, 0,
 349                                             buf->bpl, 0, buf->vb.height);
 350                         break;
 351                 case V4L2_FIELD_INTERLACED:
 352                         /* All other formats are top field first */
 353                         line0_offset = 0;
 354                         dprintk(1, "top field first\n");
 355
 356                         cx25821_risc_buffer(dev->pci, &buf->risc,
 357                                             dma->sglist, line0_offset,
 358                                             bpl_local, bpl_local, bpl_local,
 359                                             buf->vb.height >> 1);
 360                         break;
 361                 case V4L2_FIELD_SEQ_TB:
 362                         cx25821_risc_buffer(dev->pci, &buf->risc,
 363                                             dma->sglist,
 364                                             0, buf->bpl * (buf->vb.height >> 1),
 365                                             buf->bpl, 0, buf->vb.height >> 1);
 366                         break;
 367                 case V4L2_FIELD_SEQ_BT:
 368                         cx25821_risc_buffer(dev->pci, &buf->risc,
 369                                             dma->sglist,
 370                                             buf->bpl * (buf->vb.height >> 1), 0,
 371                                             buf->bpl, 0, buf->vb.height >> 1);
 372                         break;
 373                 default:
 374                         BUG();
 375                 }
 376         }
 377
 378         dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
 379                 buf, buf->vb.i, chan->width, chan->height, chan->fmt->depth,
 380                 chan->fmt->name, (unsigned long)buf->risc.dma);
 381
 382         buf->vb.state = VIDEOBUF_PREPARED;
 383
 384         return 0;
 385
 386 fail:
 387         cx25821_free_buffer(q, buf);
 388         return rc;
 389 }
 390
 391 static void cx25821_buffer_release(struct videobuf_queue *q,
 392                             struct videobuf_buffer *vb)
 393 {
 394         struct cx25821_buffer *buf =
 395                 container_of(vb, struct cx25821_buffer, vb);
 396
 397         cx25821_free_buffer(q, buf);
 398 }
 399
 400 static int cx25821_video_mmap(struct file *file, struct vm_area_struct *vma)
 401 {
 402         struct cx25821_channel *chan = video_drvdata(file);
 403
 404         return videobuf_mmap_mapper(&chan->vidq, vma);
 405 }
 406
 407
 408 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 409 {
 410         struct cx25821_buffer *buf =
 411                 container_of(vb, struct cx25821_buffer, vb);
 412         struct cx25821_buffer *prev;
 413         struct cx25821_channel *chan = vq->priv_data;
 414         struct cx25821_dev *dev = chan->dev;
 415         struct cx25821_dmaqueue *q = &dev->channels[chan->id].dma_vidq;
 416
 417         /* add jump to stopper */
 418         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 419         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
 420         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
 421
 422         dprintk(2, "jmp to stopper (0x%x)\n", buf->risc.jmp[1]);
 423
 424         if (!list_empty(&q->queued)) {
 425                 list_add_tail(&buf->vb.queue, &q->queued);
 426                 buf->vb.state = VIDEOBUF_QUEUED;
 427                 dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf,
 428                                 buf->vb.i);
 429
 430         } else if (list_empty(&q->active)) {
 431                 list_add_tail(&buf->vb.queue, &q->active);
 432                 cx25821_start_video_dma(dev, q, buf, chan->sram_channels);
 433                 buf->vb.state = VIDEOBUF_ACTIVE;
 434                 buf->count = q->count++;
 435                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 436                 dprintk(2, "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
 437                                 buf, buf->vb.i, buf->count, q->count);
 438         } else {
 439                 prev = list_entry(q->active.prev, struct cx25821_buffer,
 440                                 vb.queue);
 441                 if (prev->vb.width == buf->vb.width
 442                    && prev->vb.height == buf->vb.height
 443                    && prev->fmt == buf->fmt) {
 444                         list_add_tail(&buf->vb.queue, &q->active);
 445                         buf->vb.state = VIDEOBUF_ACTIVE;
 446                         buf->count = q->count++;
 447                         prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 448
 449                         /* 64 bit bits 63-32 */
 450                         prev->risc.jmp[2] = cpu_to_le32(0);
 451                         dprintk(2, "[%p/%d] buffer_queue - append to active, buf->count=%d\n",
 452                                         buf, buf->vb.i, buf->count);
 453
 454                 } else {
 455                         list_add_tail(&buf->vb.queue, &q->queued);
 456                         buf->vb.state = VIDEOBUF_QUEUED;
 457                         dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf,
 458                                         buf->vb.i);
 459                 }
 460         }
 461
 462         if (list_empty(&q->active))
 463                 dprintk(2, "active queue empty!\n");
 464 }
 465
 466 static struct videobuf_queue_ops cx25821_video_qops = {
 467         .buf_setup = cx25821_buffer_setup,
 468         .buf_prepare = cx25821_buffer_prepare,
 469         .buf_queue = buffer_queue,
 470         .buf_release = cx25821_buffer_release,
 471 };
 472
 473 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 474                          loff_t *ppos)
 475 {
 476         struct v4l2_fh *fh = file->private_data;
 477         struct cx25821_channel *chan = video_drvdata(file);
 478         struct cx25821_dev *dev = chan->dev;
 479         int err = 0;
 480
 481         if (mutex_lock_interruptible(&dev->lock))
 482                 return -ERESTARTSYS;
 483         if (chan->streaming_fh && chan->streaming_fh != fh) {
 484                 err = -EBUSY;
 485                 goto unlock;
 486         }
 487         chan->streaming_fh = fh;
 488
 489         err = videobuf_read_one(&chan->vidq, data, count, ppos,
 490                                 file->f_flags & O_NONBLOCK);
 491 unlock:
 492         mutex_unlock(&dev->lock);
 493         return err;
 494 }
 495
 496 static unsigned int video_poll(struct file *file,
 497                               struct poll_table_struct *wait)
 498 {
 499         struct cx25821_channel *chan = video_drvdata(file);
 500         unsigned long req_events = poll_requested_events(wait);
 501         unsigned int res = v4l2_ctrl_poll(file, wait);
 502
 503         if (req_events & (POLLIN | POLLRDNORM))
 504                 res |= videobuf_poll_stream(file, &chan->vidq, wait);
 505         return res;
 506
 507         /* This doesn't belong in poll(). This can be done
 508          * much better with vb2. We keep this code here as a
 509          * reminder.
 510         if ((res & POLLIN) && buf->vb.state == VIDEOBUF_DONE) {
 511                 struct cx25821_dev *dev = chan->dev;
 512
 513                 if (dev && chan->use_cif_resolution) {
 514                         u8 cam_id = *((char *)buf->vb.baddr + 3);
 515                         memcpy((char *)buf->vb.baddr,
 516                                         (char *)buf->vb.baddr + (chan->width * 2),
 517                                         (chan->width * 2));
 518                         *((char *)buf->vb.baddr + 3) = cam_id;
 519                 }
 520         }
 521          */
 522 }
 523
 524 static int video_release(struct file *file)
 525 {
 526         struct cx25821_channel *chan = video_drvdata(file);
 527         struct v4l2_fh *fh = file->private_data;
 528         struct cx25821_dev *dev = chan->dev;
 529         const struct sram_channel *sram_ch =
 530                 dev->channels[0].sram_channels;
 531
 532         mutex_lock(&dev->lock);
 533         /* stop the risc engine and fifo */
 534         cx_write(sram_ch->dma_ctl, 0); /* FIFO and RISC disable */
 535
 536         /* stop video capture */
 537         if (chan->streaming_fh == fh) {
 538                 videobuf_queue_cancel(&chan->vidq);
 539                 chan->streaming_fh = NULL;
 540         }
 541
 542         if (chan->vidq.read_buf) {
 543                 cx25821_buffer_release(&chan->vidq, chan->vidq.read_buf);
 544                 kfree(chan->vidq.read_buf);
 545         }
 546
 547         videobuf_mmap_free(&chan->vidq);
 548         mutex_unlock(&dev->lock);
 549
 550         return v4l2_fh_release(file);
 551 }
 552
 553 /* VIDEO IOCTLS */
 554
 555 static int cx25821_vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 556                             struct v4l2_fmtdesc *f)
 557 {
 558         if (unlikely(f->index >= ARRAY_SIZE(formats)))
 559                 return -EINVAL;
 560
 561         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
 562         f->pixelformat = formats[f->index].fourcc;
 563
 564         return 0;
 565 }
 566
 567 static int cx25821_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 568                                  struct v4l2_format *f)
 569 {
 570         struct cx25821_channel *chan = video_drvdata(file);
 571
 572         f->fmt.pix.width = chan->width;
 573         f->fmt.pix.height = chan->height;
 574         f->fmt.pix.field = chan->vidq.field;
 575         f->fmt.pix.pixelformat = chan->fmt->fourcc;
 576         f->fmt.pix.bytesperline = (chan->width * chan->fmt->depth) >> 3;
 577         f->fmt.pix.sizeimage = chan->height * f->fmt.pix.bytesperline;
 578         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 579         f->fmt.pix.priv = 0;
 580
 581         return 0;
 582 }
 583
 584 static int cx25821_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 585                                    struct v4l2_format *f)
 586 {
 587         struct cx25821_channel *chan = video_drvdata(file);
 588         struct cx25821_dev *dev = chan->dev;
 589         const struct cx25821_fmt *fmt;
 590         enum v4l2_field field = f->fmt.pix.field;
 591         unsigned int maxh;
 592         unsigned w;
 593
 594         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 595         if (NULL == fmt)
 596                 return -EINVAL;
 597         maxh = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 598
 599         w = f->fmt.pix.width;
 600         if (field != V4L2_FIELD_BOTTOM)
 601                 field = V4L2_FIELD_TOP;
 602         if (w < 352) {
 603                 w = 176;
 604                 f->fmt.pix.height = maxh / 4;
 605         } else if (w < 720) {
 606                 w = 352;
 607                 f->fmt.pix.height = maxh / 2;
 608         } else {
 609                 w = 720;
 610                 f->fmt.pix.height = maxh;
 611                 field = V4L2_FIELD_INTERLACED;
 612         }
 613         f->fmt.pix.field = field;
 614         f->fmt.pix.width = w;
 615         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 616         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 617         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 618         f->fmt.pix.priv = 0;
 619
 620         return 0;
 621 }
 622
 623 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 624                                 struct v4l2_format *f)
 625 {
 626         struct cx25821_channel *chan = video_drvdata(file);
 627         struct cx25821_dev *dev = chan->dev;
 628         int pix_format = PIXEL_FRMT_422;
 629         int err;
 630
 631         err = cx25821_vidioc_try_fmt_vid_cap(file, priv, f);
 632
 633         if (0 != err)
 634                 return err;
 635
 636         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 637         chan->vidq.field = f->fmt.pix.field;
 638         chan->width = f->fmt.pix.width;
 639         chan->height = f->fmt.pix.height;
 640
 641         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 642                 pix_format = PIXEL_FRMT_411;
 643         else
 644                 pix_format = PIXEL_FRMT_422;
 645
 646         cx25821_set_pixel_format(dev, SRAM_CH00, pix_format);
 647
 648         /* check if cif resolution */
 649         if (chan->width == 320 || chan->width == 352)
 650                 chan->use_cif_resolution = 1;
 651         else
 652                 chan->use_cif_resolution = 0;
 653
 654         chan->cif_width = chan->width;
 655         medusa_set_resolution(dev, chan->width, SRAM_CH00);
 656         return 0;
 657 }
 658
 659 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 660 {
 661         struct cx25821_channel *chan = video_drvdata(file);
 662
 663         if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 664                 return -EINVAL;
 665
 666         if (chan->streaming_fh && chan->streaming_fh != priv)
 667                 return -EBUSY;
 668         chan->streaming_fh = priv;
 669
 670         return videobuf_streamon(&chan->vidq);
 671 }
 672
 673 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 674 {
 675         struct cx25821_channel *chan = video_drvdata(file);
 676
 677         if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 678                 return -EINVAL;
 679
 680         if (chan->streaming_fh && chan->streaming_fh != priv)
 681                 return -EBUSY;
 682         if (chan->streaming_fh == NULL)
 683                 return 0;
 684
 685         chan->streaming_fh = NULL;
 686         return videobuf_streamoff(&chan->vidq);
 687 }
 688
 689 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 690 {
 691         int ret_val = 0;
 692         struct cx25821_channel *chan = video_drvdata(file);
 693
 694         ret_val = videobuf_dqbuf(&chan->vidq, p, file->f_flags & O_NONBLOCK);
 695         p->sequence = chan->dma_vidq.count;
 696
 697         return ret_val;
 698 }
 699
 700 static int vidioc_log_status(struct file *file, void *priv)
 701 {
 702         struct cx25821_channel *chan = video_drvdata(file);
 703         struct cx25821_dev *dev = chan->dev;
 704         const struct sram_channel *sram_ch = chan->sram_channels;
 705         u32 tmp = 0;
 706
 707         tmp = cx_read(sram_ch->dma_ctl);
 708         pr_info("Video input 0 is %s\n",
 709                 (tmp & 0x11) ? "streaming" : "stopped");
 710         return 0;
 711 }
 712
 713
 714 static int cx25821_vidioc_querycap(struct file *file, void *priv,
 715                             struct v4l2_capability *cap)
 716 {
 717         struct cx25821_channel *chan = video_drvdata(file);
 718         struct cx25821_dev *dev = chan->dev;
 719         const u32 cap_input = V4L2_CAP_VIDEO_CAPTURE |
 720                         V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 721         const u32 cap_output = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE;
 722
 723         strcpy(cap->driver, "cx25821");
 724         strlcpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
 725         sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
 726         if (chan->id >= VID_CHANNEL_NUM)
 727                 cap->device_caps = cap_output;
 728         else
 729                 cap->device_caps = cap_input;
 730         cap->capabilities = cap_input | cap_output | V4L2_CAP_DEVICE_CAPS;
 731         return 0;
 732 }
 733
 734 static int cx25821_vidioc_reqbufs(struct file *file, void *priv,
 735                            struct v4l2_requestbuffers *p)
 736 {
 737         struct cx25821_channel *chan = video_drvdata(file);
 738
 739         return videobuf_reqbufs(&chan->vidq, p);
 740 }
 741
 742 static int cx25821_vidioc_querybuf(struct file *file, void *priv,
 743                             struct v4l2_buffer *p)
 744 {
 745         struct cx25821_channel *chan = video_drvdata(file);
 746
 747         return videobuf_querybuf(&chan->vidq, p);
 748 }
 749
 750 static int cx25821_vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 751 {
 752         struct cx25821_channel *chan = video_drvdata(file);
 753
 754         return videobuf_qbuf(&chan->vidq, p);
 755 }
 756
 757 static int cx25821_vidioc_g_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
 758 {
 759         struct cx25821_channel *chan = video_drvdata(file);
 760
 761         *tvnorms = chan->dev->tvnorm;
 762         return 0;
 763 }
 764
 765 static int cx25821_vidioc_s_std(struct file *file, void *priv,
 766                                 v4l2_std_id tvnorms)
 767 {
 768         struct cx25821_channel *chan = video_drvdata(file);
 769         struct cx25821_dev *dev = chan->dev;
 770
 771         if (dev->tvnorm == tvnorms)
 772                 return 0;
 773
 774         dev->tvnorm = tvnorms;
 775         chan->width = 720;
 776         chan->height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 777
 778         medusa_set_videostandard(dev);
 779
 780         return 0;
 781 }
 782
 783 static int cx25821_vidioc_enum_input(struct file *file, void *priv,
 784                               struct v4l2_input *i)
 785 {
 786         if (i->index)
 787                 return -EINVAL;
 788
 789         i->type = V4L2_INPUT_TYPE_CAMERA;
 790         i->std = CX25821_NORMS;
 791         strcpy(i->name, "Composite");
 792         return 0;
 793 }
 794
 795 static int cx25821_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 796 {
 797         *i = 0;
 798         return 0;
 799 }
 800
 801 static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
 802 {
 803         return i ? -EINVAL : 0;
 804 }
 805
 806 static int cx25821_s_ctrl(struct v4l2_ctrl *ctrl)
 807 {
 808         struct cx25821_channel *chan =
 809                 container_of(ctrl->handler, struct cx25821_channel, hdl);
 810         struct cx25821_dev *dev = chan->dev;
 811
 812         switch (ctrl->id) {
 813         case V4L2_CID_BRIGHTNESS:
 814                 medusa_set_brightness(dev, ctrl->val, chan->id);
 815                 break;
 816         case V4L2_CID_HUE:
 817                 medusa_set_hue(dev, ctrl->val, chan->id);
 818                 break;
 819         case V4L2_CID_CONTRAST:
 820                 medusa_set_contrast(dev, ctrl->val, chan->id);
 821                 break;
 822         case V4L2_CID_SATURATION:
 823                 medusa_set_saturation(dev, ctrl->val, chan->id);
 824                 break;
 825         default:
 826                 return -EINVAL;
 827         }
 828         return 0;
 829 }
 830
 831 static int cx25821_vidioc_enum_output(struct file *file, void *priv,
 832                               struct v4l2_output *o)
 833 {
 834         if (o->index)
 835                 return -EINVAL;
 836
 837         o->type = V4L2_INPUT_TYPE_CAMERA;
 838         o->std = CX25821_NORMS;
 839         strcpy(o->name, "Composite");
 840         return 0;
 841 }
 842
 843 static int cx25821_vidioc_g_output(struct file *file, void *priv, unsigned int *o)
 844 {
 845         *o = 0;
 846         return 0;
 847 }
 848
 849 static int cx25821_vidioc_s_output(struct file *file, void *priv, unsigned int o)
 850 {
 851         return o ? -EINVAL : 0;
 852 }
 853
 854 static int cx25821_vidioc_try_fmt_vid_out(struct file *file, void *priv,
 855                                    struct v4l2_format *f)
 856 {
 857         struct cx25821_channel *chan = video_drvdata(file);
 858         struct cx25821_dev *dev = chan->dev;
 859         const struct cx25821_fmt *fmt;
 860
 861         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 862         if (NULL == fmt)
 863                 return -EINVAL;
 864         f->fmt.pix.width = 720;
 865         f->fmt.pix.height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 866         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 867         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 868         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 869         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 870         f->fmt.pix.priv = 0;
 871         return 0;
 872 }
 873
 874 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
 875                                 struct v4l2_format *f)
 876 {
 877         struct cx25821_channel *chan = video_drvdata(file);
 878         int err;
 879
 880         err = cx25821_vidioc_try_fmt_vid_out(file, priv, f);
 881
 882         if (0 != err)
 883                 return err;
 884
 885         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 886         chan->vidq.field = f->fmt.pix.field;
 887         chan->width = f->fmt.pix.width;
 888         chan->height = f->fmt.pix.height;
 889         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 890                 chan->pixel_formats = PIXEL_FRMT_411;
 891         else
 892                 chan->pixel_formats = PIXEL_FRMT_422;
 893         return 0;
 894 }
 895
 896 static ssize_t video_write(struct file *file, const char __user *data, size_t count,
 897                          loff_t *ppos)
 898 {
 899         struct cx25821_channel *chan = video_drvdata(file);
 900         struct cx25821_dev *dev = chan->dev;
 901         struct v4l2_fh *fh = file->private_data;
 902         int err = 0;
 903
 904         if (mutex_lock_interruptible(&dev->lock))
 905                 return -ERESTARTSYS;
 906         if (chan->streaming_fh && chan->streaming_fh != fh) {
 907                 err = -EBUSY;
 908                 goto unlock;
 909         }
 910         if (!chan->streaming_fh) {
 911                 err = cx25821_vidupstream_init(chan, chan->pixel_formats);
 912                 if (err)
 913                         goto unlock;
 914                 chan->streaming_fh = fh;
 915         }
 916
 917         err = cx25821_write_frame(chan, data, count);
 918         count -= err;
 919         *ppos += err;
 920
 921 unlock:
 922         mutex_unlock(&dev->lock);
 923         return err;
 924 }
 925
 926 static int video_out_release(struct file *file)
 927 {
 928         struct cx25821_channel *chan = video_drvdata(file);
 929         struct cx25821_dev *dev = chan->dev;
 930         struct v4l2_fh *fh = file->private_data;
 931
 932         mutex_lock(&dev->lock);
 933         if (chan->streaming_fh == fh) {
 934                 cx25821_stop_upstream_video(chan);
 935                 chan->streaming_fh = NULL;
 936         }
 937         mutex_unlock(&dev->lock);
 938
 939         return v4l2_fh_release(file);
 940 }
 941
 942 static const struct v4l2_ctrl_ops cx25821_ctrl_ops = {
 943         .s_ctrl = cx25821_s_ctrl,
 944 };
 945
 946 static const struct v4l2_file_operations video_fops = {
 947         .owner = THIS_MODULE,
 948         .open = v4l2_fh_open,
 949         .release = video_release,
 950         .read = video_read,
 951         .poll = video_poll,
 952         .mmap = cx25821_video_mmap,
 953         .unlocked_ioctl = video_ioctl2,
 954 };
 955
 956 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 957         .vidioc_querycap = cx25821_vidioc_querycap,
 958         .vidioc_enum_fmt_vid_cap = cx25821_vidioc_enum_fmt_vid_cap,
 959         .vidioc_g_fmt_vid_cap = cx25821_vidioc_g_fmt_vid_cap,
 960         .vidioc_try_fmt_vid_cap = cx25821_vidioc_try_fmt_vid_cap,
 961         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 962         .vidioc_reqbufs = cx25821_vidioc_reqbufs,
 963         .vidioc_querybuf = cx25821_vidioc_querybuf,
 964         .vidioc_qbuf = cx25821_vidioc_qbuf,
 965         .vidioc_dqbuf = vidioc_dqbuf,
 966         .vidioc_g_std = cx25821_vidioc_g_std,
 967         .vidioc_s_std = cx25821_vidioc_s_std,
 968         .vidioc_enum_input = cx25821_vidioc_enum_input,
 969         .vidioc_g_input = cx25821_vidioc_g_input,
 970         .vidioc_s_input = cx25821_vidioc_s_input,
 971         .vidioc_streamon = vidioc_streamon,
 972         .vidioc_streamoff = vidioc_streamoff,
 973         .vidioc_log_status = vidioc_log_status,
 974         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 975         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 976 };
 977
 978 static const struct video_device cx25821_video_device = {
 979         .name = "cx25821-video",
 980         .fops = &video_fops,
 981         .release = video_device_release_empty,
 982         .minor = -1,
 983         .ioctl_ops = &video_ioctl_ops,
 984         .tvnorms = CX25821_NORMS,
 985 };
 986
 987 static const struct v4l2_file_operations video_out_fops = {
 988         .owner = THIS_MODULE,
 989         .open = v4l2_fh_open,
 990         .write = video_write,
 991         .release = video_out_release,
 992         .unlocked_ioctl = video_ioctl2,
 993 };
 994
 995 static const struct v4l2_ioctl_ops video_out_ioctl_ops = {
 996         .vidioc_querycap = cx25821_vidioc_querycap,
 997         .vidioc_enum_fmt_vid_out = cx25821_vidioc_enum_fmt_vid_cap,
 998         .vidioc_g_fmt_vid_out = cx25821_vidioc_g_fmt_vid_cap,
 999         .vidioc_try_fmt_vid_out = cx25821_vidioc_try_fmt_vid_out,
1000         .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
1001         .vidioc_g_std = cx25821_vidioc_g_std,
1002         .vidioc_s_std = cx25821_vidioc_s_std,
1003         .vidioc_enum_output = cx25821_vidioc_enum_output,
1004         .vidioc_g_output = cx25821_vidioc_g_output,
1005         .vidioc_s_output = cx25821_vidioc_s_output,
1006         .vidioc_log_status = vidioc_log_status,
1007 };
1008
1009 static const struct video_device cx25821_video_out_device = {
1010         .name = "cx25821-video",
1011         .fops = &video_out_fops,
1012         .release = video_device_release_empty,
1013         .minor = -1,
1014         .ioctl_ops = &video_out_ioctl_ops,
1015         .tvnorms = CX25821_NORMS,
1016 };
1017
1018 void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
1019 {
1020         cx_clear(PCI_INT_MSK, 1);
1021
1022         if (video_is_registered(&dev->channels[chan_num].vdev)) {
1023                 video_unregister_device(&dev->channels[chan_num].vdev);
1024                 v4l2_ctrl_handler_free(&dev->channels[chan_num].hdl);
1025
1026                 btcx_riscmem_free(dev->pci,
1027                                 &dev->channels[chan_num].dma_vidq.stopper);
1028         }
1029 }
1030
1031 int cx25821_video_register(struct cx25821_dev *dev)
1032 {
1033         int err;
1034         int i;
1035
1036         /* initial device configuration */
1037         dev->tvnorm = V4L2_STD_NTSC_M;
1038
1039         spin_lock_init(&dev->slock);
1040
1041         for (i = 0; i < MAX_VID_CHANNEL_NUM - 1; ++i) {
1042                 struct cx25821_channel *chan = &dev->channels[i];
1043                 struct video_device *vdev = &chan->vdev;
1044                 struct v4l2_ctrl_handler *hdl = &chan->hdl;
1045                 bool is_output = i > SRAM_CH08;
1046
1047                 if (i == SRAM_CH08) /* audio channel */
1048                         continue;
1049
1050                 if (!is_output) {
1051                         v4l2_ctrl_handler_init(hdl, 4);
1052                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
1053                                         V4L2_CID_BRIGHTNESS, 0, 10000, 1, 6200);
1054                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
1055                                         V4L2_CID_CONTRAST, 0, 10000, 1, 5000);
1056                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
1057                                         V4L2_CID_SATURATION, 0, 10000, 1, 5000);
1058                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
1059                                         V4L2_CID_HUE, 0, 10000, 1, 5000);
1060                         if (hdl->error) {
1061                                 err = hdl->error;
1062                                 goto fail_unreg;
1063                         }
1064                         err = v4l2_ctrl_handler_setup(hdl);
1065                         if (err)
1066                                 goto fail_unreg;
1067                 } else {
1068                         chan->out = &dev->vid_out_data[i - SRAM_CH09];
1069                         chan->out->chan = chan;
1070                 }
1071
1072                 cx25821_risc_stopper(dev->pci, &chan->dma_vidq.stopper,
1073                         chan->sram_channels->dma_ctl, 0x11, 0);
1074
1075                 chan->sram_channels = &cx25821_sram_channels[i];
1076                 chan->width = 720;
1077                 if (dev->tvnorm & V4L2_STD_625_50)
1078                         chan->height = 576;
1079                 else
1080                         chan->height = 480;
1081
1082                 if (chan->pixel_formats == PIXEL_FRMT_411)
1083                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_Y41P);
1084                 else
1085                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_YUYV);
1086
1087                 cx_write(chan->sram_channels->int_stat, 0xffffffff);
1088
1089                 INIT_LIST_HEAD(&chan->dma_vidq.active);
1090                 INIT_LIST_HEAD(&chan->dma_vidq.queued);
1091
1092                 chan->timeout_data.dev = dev;
1093                 chan->timeout_data.channel = &cx25821_sram_channels[i];
1094                 chan->dma_vidq.timeout.function = cx25821_vid_timeout;
1095                 chan->dma_vidq.timeout.data = (unsigned long)&chan->timeout_data;
1096                 init_timer(&chan->dma_vidq.timeout);
1097
1098                 if (!is_output)
1099                         videobuf_queue_sg_init(&chan->vidq, &cx25821_video_qops, &dev->pci->dev,
1100                                 &dev->slock, V4L2_BUF_TYPE_VIDEO_CAPTURE,
1101                                 V4L2_FIELD_INTERLACED, sizeof(struct cx25821_buffer),
1102                                 chan, &dev->lock);
1103
1104                 /* register v4l devices */
1105                 *vdev = is_output ? cx25821_video_out_device : cx25821_video_device;
1106                 vdev->v4l2_dev = &dev->v4l2_dev;
1107                 if (!is_output)
1108                         vdev->ctrl_handler = hdl;
1109                 else
1110                         vdev->vfl_dir = VFL_DIR_TX;
1111                 vdev->lock = &dev->lock;
1112                 set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags);
1113                 snprintf(vdev->name, sizeof(vdev->name), "%s #%d", dev->name, i);
1114                 video_set_drvdata(vdev, chan);
1115
1116                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
1117                                             video_nr[dev->nr]);
1118
1119                 if (err < 0)
1120                         goto fail_unreg;
1121         }
1122
1123         /* set PCI interrupt */
1124         cx_set(PCI_INT_MSK, 0xff);
1125
1126         return 0;
1127
1128 fail_unreg:
1129         while (i >= 0)
1130                 cx25821_video_unregister(dev, i--);
1131         return err;
1132 }