drivers/staging/cx25821/cx25821-videoioctl.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 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
  27 {
  28         struct cx25821_buffer *buf =
  29             container_of(vb, struct cx25821_buffer, vb);
  30         struct cx25821_buffer *prev;
  31         struct cx25821_fh *fh = vq->priv_data;
  32         struct cx25821_dev *dev = fh->dev;
  33         struct cx25821_dmaqueue *q = &dev->vidq[VIDEO_IOCTL_CH];
  34
  35         /* add jump to stopper */
  36         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
  37         buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
  38         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
  39
  40         dprintk(2, "jmp to stopper (0x%x)\n", buf->risc.jmp[1]);
  41
  42         if (!list_empty(&q->queued)) {
  43                 list_add_tail(&buf->vb.queue, &q->queued);
  44                 buf->vb.state = VIDEOBUF_QUEUED;
  45                 dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf,
  46                         buf->vb.i);
  47
  48         } else if (list_empty(&q->active)) {
  49                 list_add_tail(&buf->vb.queue, &q->active);
  50                 cx25821_start_video_dma(dev, q, buf,
  51                                         &dev->sram_channels[VIDEO_IOCTL_CH]);
  52                 buf->vb.state = VIDEOBUF_ACTIVE;
  53                 buf->count = q->count++;
  54                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
  55                 dprintk(2,
  56                         "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
  57                         buf, buf->vb.i, buf->count, q->count);
  58         } else {
  59                 prev =
  60                     list_entry(q->active.prev, struct cx25821_buffer, vb.queue);
  61                 if (prev->vb.width == buf->vb.width
  62                     && prev->vb.height == buf->vb.height
  63                     && prev->fmt == buf->fmt) {
  64                         list_add_tail(&buf->vb.queue, &q->active);
  65                         buf->vb.state = VIDEOBUF_ACTIVE;
  66                         buf->count = q->count++;
  67                         prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
  68
  69                         /* 64 bit bits 63-32 */
  70                         prev->risc.jmp[2] = cpu_to_le32(0);
  71                         dprintk(2,
  72                                 "[%p/%d] buffer_queue - append to active, buf->count=%d\n",
  73                                 buf, buf->vb.i, buf->count);
  74
  75                 } else {
  76                         list_add_tail(&buf->vb.queue, &q->queued);
  77                         buf->vb.state = VIDEOBUF_QUEUED;
  78                         dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf,
  79                                 buf->vb.i);
  80                 }
  81         }
  82
  83         if (list_empty(&q->active)) {
  84                 dprintk(2, "active queue empty!\n");
  85         }
  86 }
  87
  88 static struct videobuf_queue_ops cx25821_video_qops = {
  89         .buf_setup = buffer_setup,
  90         .buf_prepare = buffer_prepare,
  91         .buf_queue = buffer_queue,
  92         .buf_release = buffer_release,
  93 };
  94
  95 static int video_open(struct file *file)
  96 {
  97         int minor = video_devdata(file)->minor;
  98         struct cx25821_dev *h, *dev = NULL;
  99         struct cx25821_fh *fh;
 100         struct list_head *list;
 101         enum v4l2_buf_type type = 0;
 102         u32 pix_format;
 103
 104         lock_kernel();
 105         list_for_each(list, &cx25821_devlist) {
 106                 h = list_entry(list, struct cx25821_dev, devlist);
 107
 108                 if (h->ioctl_dev && h->ioctl_dev->minor == minor) {
 109                         dev = h;
 110                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 111                 }
 112         }
 113
 114         if (NULL == dev) {
 115                 unlock_kernel();
 116                 return -ENODEV;
 117         }
 118
 119         printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);
 120
 121         /* allocate + initialize per filehandle data */
 122         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
 123         if (NULL == fh) {
 124                 unlock_kernel();
 125                 return -ENOMEM;
 126         }
 127
 128         file->private_data = fh;
 129         fh->dev = dev;
 130         fh->type = type;
 131         fh->width = 720;
 132
 133         if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
 134                 fh->height = 576;
 135         else
 136                 fh->height = 480;
 137
 138         dev->channel_opened = VIDEO_IOCTL_CH;
 139         pix_format = V4L2_PIX_FMT_YUYV;
 140         fh->fmt = format_by_fourcc(pix_format);
 141
 142         v4l2_prio_open(&dev->prio, &fh->prio);
 143
 144         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 145                                &dev->pci->dev, &dev->slock,
 146                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 147                                V4L2_FIELD_INTERLACED,
 148                                sizeof(struct cx25821_buffer), fh);
 149
 150         dprintk(1, "post videobuf_queue_init()\n");
 151         unlock_kernel();
 152
 153         return 0;
 154 }
 155
 156 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 157                           loff_t * ppos)
 158 {
 159         struct cx25821_fh *fh = file->private_data;
 160
 161         switch (fh->type) {
 162         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 163                 if (res_locked(fh->dev, RESOURCE_VIDEO_IOCTL))
 164                         return -EBUSY;
 165
 166                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 167                                          file->f_flags & O_NONBLOCK);
 168
 169         default:
 170                 BUG();
 171                 return 0;
 172         }
 173 }
 174
 175 static unsigned int video_poll(struct file *file,
 176                                struct poll_table_struct *wait)
 177 {
 178         struct cx25821_fh *fh = file->private_data;
 179         struct cx25821_buffer *buf;
 180
 181         if (res_check(fh, RESOURCE_VIDEO_IOCTL)) {
 182                 /* streaming capture */
 183                 if (list_empty(&fh->vidq.stream))
 184                         return POLLERR;
 185                 buf = list_entry(fh->vidq.stream.next,
 186                                  struct cx25821_buffer, vb.stream);
 187         } else {
 188                 /* read() capture */
 189                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 190                 if (NULL == buf)
 191                         return POLLERR;
 192         }
 193
 194         poll_wait(file, &buf->vb.done, wait);
 195         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)
 196                 return POLLIN | POLLRDNORM;
 197
 198         return 0;
 199 }
 200
 201 static int video_release(struct file *file)
 202 {
 203         struct cx25821_fh *fh = file->private_data;
 204         struct cx25821_dev *dev = fh->dev;
 205
 206         /* stop video capture */
 207         if (res_check(fh, RESOURCE_VIDEO_IOCTL)) {
 208                 videobuf_queue_cancel(&fh->vidq);
 209                 res_free(dev, fh, RESOURCE_VIDEO_IOCTL);
 210         }
 211
 212         if (fh->vidq.read_buf) {
 213                 buffer_release(&fh->vidq, fh->vidq.read_buf);
 214                 kfree(fh->vidq.read_buf);
 215         }
 216
 217         videobuf_mmap_free(&fh->vidq);
 218
 219         v4l2_prio_close(&dev->prio, &fh->prio);
 220
 221         file->private_data = NULL;
 222         kfree(fh);
 223
 224         return 0;
 225 }
 226
 227 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 228 {
 229         struct cx25821_fh *fh = priv;
 230         struct cx25821_dev *dev = fh->dev;
 231
 232         if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 233                 return -EINVAL;
 234         }
 235
 236         if (unlikely(i != fh->type)) {
 237                 return -EINVAL;
 238         }
 239
 240         if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO_IOCTL)))) {
 241                 return -EBUSY;
 242         }
 243
 244         return videobuf_streamon(get_queue(fh));
 245 }
 246
 247 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 248 {
 249         struct cx25821_fh *fh = priv;
 250         struct cx25821_dev *dev = fh->dev;
 251         int err, res;
 252
 253         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 254                 return -EINVAL;
 255         if (i != fh->type)
 256                 return -EINVAL;
 257
 258         res = get_resource(fh, RESOURCE_VIDEO_IOCTL);
 259         err = videobuf_streamoff(get_queue(fh));
 260         if (err < 0)
 261                 return err;
 262         res_free(dev, fh, res);
 263         return 0;
 264 }
 265
 266 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 267                                 struct v4l2_format *f)
 268 {
 269         struct cx25821_fh *fh = priv;
 270         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 271         int err;
 272
 273         if (fh) {
 274                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 275                 if (0 != err)
 276                         return err;
 277         }
 278
 279         dprintk(2, "%s()\n", __func__);
 280         err = vidioc_try_fmt_vid_cap(file, priv, f);
 281
 282         if (0 != err)
 283                 return err;
 284         fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 285         fh->width = f->fmt.pix.width;
 286         fh->height = f->fmt.pix.height;
 287         fh->vidq.field = f->fmt.pix.field;
 288         dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
 289                 fh->height, fh->vidq.field);
 290         cx25821_call_all(dev, video, s_fmt, f);
 291         return 0;
 292 }
 293
 294 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 295 {
 296         struct cx25821_fh *fh = priv;
 297         return videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 298 }
 299
 300 static long video_ioctl_set(struct file *file, unsigned int cmd,
 301                             unsigned long arg)
 302 {
 303         struct cx25821_fh *fh = file->private_data;
 304         struct cx25821_dev *dev = fh->dev;
 305         struct downstream_user_struct *data_from_user;
 306         int command;
 307         int width = 720;
 308         int selected_channel = 0, pix_format = 0, i = 0;
 309         int cif_enable = 0, cif_width = 0;
 310         u32 value = 0;
 311
 312         data_from_user = (struct downstream_user_struct *)arg;
 313
 314         if (!data_from_user) {
 315                 printk("cx25821 in %s(): User data is INVALID. Returning.\n",
 316                        __func__);
 317                 return 0;
 318         }
 319
 320         command = data_from_user->command;
 321
 322         if (command != SET_VIDEO_STD && command != SET_PIXEL_FORMAT
 323             && command != ENABLE_CIF_RESOLUTION && command != REG_READ
 324             && command != REG_WRITE && command != MEDUSA_READ
 325             && command != MEDUSA_WRITE) {
 326                 return 0;
 327         }
 328
 329         switch (command) {
 330         case SET_VIDEO_STD:
 331                 dev->tvnorm =
 332                     !strcmp(data_from_user->vid_stdname,
 333                             "PAL") ? V4L2_STD_PAL_BG : V4L2_STD_NTSC_M;
 334                 medusa_set_videostandard(dev);
 335                 break;
 336
 337         case SET_PIXEL_FORMAT:
 338                 selected_channel = data_from_user->decoder_select;
 339                 pix_format = data_from_user->pixel_format;
 340
 341                 if (!(selected_channel <= 7 && selected_channel >= 0)) {
 342                         selected_channel -= 4;
 343                         selected_channel = selected_channel % 8;
 344                 }
 345
 346                 if (selected_channel >= 0)
 347                         cx25821_set_pixel_format(dev, selected_channel,
 348                                                  pix_format);
 349
 350                 break;
 351
 352         case ENABLE_CIF_RESOLUTION:
 353                 selected_channel = data_from_user->decoder_select;
 354                 cif_enable = data_from_user->cif_resolution_enable;
 355                 cif_width = data_from_user->cif_width;
 356
 357                 if (cif_enable) {
 358                         if (dev->tvnorm & V4L2_STD_PAL_BG
 359                             || dev->tvnorm & V4L2_STD_PAL_DK)
 360                                 width = 352;
 361                         else
 362                                 width = (cif_width == 320
 363                                          || cif_width == 352) ? cif_width : 320;
 364                 }
 365
 366                 if (!(selected_channel <= 7 && selected_channel >= 0)) {
 367                         selected_channel -= 4;
 368                         selected_channel = selected_channel % 8;
 369                 }
 370
 371                 if (selected_channel <= 7 && selected_channel >= 0) {
 372                         dev->use_cif_resolution[selected_channel] = cif_enable;
 373                         dev->cif_width[selected_channel] = width;
 374                 } else {
 375                         for (i = 0; i < VID_CHANNEL_NUM; i++) {
 376                                 dev->use_cif_resolution[i] = cif_enable;
 377                                 dev->cif_width[i] = width;
 378                         }
 379                 }
 380
 381                 medusa_set_resolution(dev, width, selected_channel);
 382                 break;
 383         case REG_READ:
 384                 data_from_user->reg_data = cx_read(data_from_user->reg_address);
 385                 break;
 386         case REG_WRITE:
 387                 cx_write(data_from_user->reg_address, data_from_user->reg_data);
 388                 break;
 389         case MEDUSA_READ:
 390                 value =
 391                     cx25821_i2c_read(&dev->i2c_bus[0],
 392                                      (u16) data_from_user->reg_address,
 393                                      &data_from_user->reg_data);
 394                 break;
 395         case MEDUSA_WRITE:
 396                 cx25821_i2c_write(&dev->i2c_bus[0],
 397                                   (u16) data_from_user->reg_address,
 398                                   data_from_user->reg_data);
 399                 break;
 400         }
 401
 402         return 0;
 403 }
 404
 405 static int vidioc_log_status(struct file *file, void *priv)
 406 {
 407         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 408         char name[32 + 2];
 409
 410         snprintf(name, sizeof(name), "%s/2", dev->name);
 411         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 412                dev->name);
 413         cx25821_call_all(dev, core, log_status);
 414         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 415                dev->name);
 416         return 0;
 417 }
 418
 419 static int vidioc_s_ctrl(struct file *file, void *priv,
 420                          struct v4l2_control *ctl)
 421 {
 422         struct cx25821_fh *fh = priv;
 423         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 424         int err;
 425
 426         if (fh) {
 427                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 428                 if (0 != err)
 429                         return err;
 430         }
 431
 432         return 0;
 433 }
 434
 435 // exported stuff
 436 static const struct v4l2_file_operations video_fops = {
 437         .owner = THIS_MODULE,
 438         .open = video_open,
 439         .release = video_release,
 440         .read = video_read,
 441         .poll = video_poll,
 442         .mmap = video_mmap,
 443         .ioctl = video_ioctl_set,
 444 };
 445
 446 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 447         .vidioc_querycap = vidioc_querycap,
 448         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 449         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 450         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 451         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 452         .vidioc_reqbufs = vidioc_reqbufs,
 453         .vidioc_querybuf = vidioc_querybuf,
 454         .vidioc_qbuf = vidioc_qbuf,
 455         .vidioc_dqbuf = vidioc_dqbuf,
 456 #ifdef TUNER_FLAG
 457         .vidioc_s_std = vidioc_s_std,
 458         .vidioc_querystd = vidioc_querystd,
 459 #endif
 460         .vidioc_cropcap = vidioc_cropcap,
 461         .vidioc_s_crop = vidioc_s_crop,
 462         .vidioc_g_crop = vidioc_g_crop,
 463         .vidioc_enum_input = vidioc_enum_input,
 464         .vidioc_g_input = vidioc_g_input,
 465         .vidioc_s_input = vidioc_s_input,
 466         .vidioc_g_ctrl = vidioc_g_ctrl,
 467         .vidioc_s_ctrl = vidioc_s_ctrl,
 468         .vidioc_queryctrl = vidioc_queryctrl,
 469         .vidioc_streamon = vidioc_streamon,
 470         .vidioc_streamoff = vidioc_streamoff,
 471         .vidioc_log_status = vidioc_log_status,
 472         .vidioc_g_priority = vidioc_g_priority,
 473         .vidioc_s_priority = vidioc_s_priority,
 474 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 475         .vidiocgmbuf = vidiocgmbuf,
 476 #endif
 477 #ifdef TUNER_FLAG
 478         .vidioc_g_tuner = vidioc_g_tuner,
 479         .vidioc_s_tuner = vidioc_s_tuner,
 480         .vidioc_g_frequency = vidioc_g_frequency,
 481         .vidioc_s_frequency = vidioc_s_frequency,
 482 #endif
 483 #ifdef CONFIG_VIDEO_ADV_DEBUG
 484         .vidioc_g_register = vidioc_g_register,
 485         .vidioc_s_register = vidioc_s_register,
 486 #endif
 487 };
 488
 489 struct video_device cx25821_videoioctl_template = {
 490         .name = "cx25821-videoioctl",
 491         .fops = &video_fops,
 492         .minor = -1,
 493         .ioctl_ops = &video_ioctl_ops,
 494         .tvnorms = CX25821_NORMS,
 495         .current_norm = V4L2_STD_NTSC_M,
 496 };