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