drivers/staging/cx25821/cx25821-video7.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
  27 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
  28 {
  29     struct cx25821_buffer   *buf = 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[SRAM_CH07];
  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     if (!list_empty(&q->queued)) {
  42         list_add_tail(&buf->vb.queue, &q->queued);
  43         buf->vb.state = VIDEOBUF_QUEUED;
  44         dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf, buf->vb.i);
  45
  46     } else if (list_empty(&q->active)) {
  47         list_add_tail(&buf->vb.queue, &q->active);
  48         cx25821_start_video_dma(dev, q, buf, &dev->sram_channels[SRAM_CH07]);
  49         buf->vb.state = VIDEOBUF_ACTIVE;
  50         buf->count    = q->count++;
  51         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
  52         dprintk(2, "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
  53                                 buf, buf->vb. i, buf->count, q->count);
  54     } else {
  55         prev = list_entry(q->active.prev, struct cx25821_buffer, vb.queue);
  56         if (prev->vb.width  == buf->vb.width  &&
  57             prev->vb.height == buf->vb.height &&
  58             prev->fmt       == buf->fmt) {
  59             list_add_tail(&buf->vb.queue, &q->active);
  60             buf->vb.state = VIDEOBUF_ACTIVE;
  61             buf->count    = q->count++;
  62             prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
  63
  64             /* 64 bit bits 63-32 */
  65             prev->risc.jmp[2] = cpu_to_le32(0);
  66             dprintk(2, "[%p/%d] buffer_queue - append to active, buf->count=%d\n",  buf, buf->vb.i, buf->count);
  67
  68         } else {
  69             list_add_tail(&buf->vb.queue, &q->queued);
  70             buf->vb.state = VIDEOBUF_QUEUED;
  71             dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf, buf->vb.i);
  72         }
  73     }
  74
  75     if (list_empty(&q->active))
  76     {
  77        dprintk(2, "active queue empty!\n");
  78     }
  79 }
  80
  81
  82 static struct videobuf_queue_ops cx25821_video_qops = {
  83     .buf_setup    = buffer_setup,
  84     .buf_prepare  = buffer_prepare,
  85     .buf_queue    = buffer_queue,
  86     .buf_release  = buffer_release,
  87 };
  88
  89
  90 static int video_open(struct file *file)
  91 {
  92     int minor = video_devdata(file)->minor;
  93     struct cx25821_dev *h, *dev = NULL;
  94     struct cx25821_fh *fh;
  95     struct list_head *list;
  96     enum v4l2_buf_type type = 0;
  97     u32 pix_format;
  98
  99     lock_kernel();
 100     list_for_each(list, &cx25821_devlist)
 101     {
 102         h = list_entry(list, struct cx25821_dev, devlist);
 103
 104         if (h->video_dev[SRAM_CH07] && h->video_dev[SRAM_CH07]->minor == minor) {
 105             dev  = h;
 106             type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 107         }
 108     }
 109
 110     if (NULL == dev) {
 111         unlock_kernel();
 112         return -ENODEV;
 113     }
 114
 115     printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);
 116
 117     /* allocate + initialize per filehandle data */
 118     fh = kzalloc(sizeof(*fh), GFP_KERNEL);
 119     if (NULL == fh) {
 120         unlock_kernel();
 121         return -ENOMEM;
 122     }
 123     file->private_data = fh;
 124     fh->dev      = dev;
 125     fh->type     = type;
 126     fh->width    = 720;
 127
 128     if(dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
 129         fh->height = 576;
 130     else
 131         fh->height = 480;
 132
 133     dev->channel_opened = SRAM_CH07;
 134     pix_format          = (dev->pixel_formats[dev->channel_opened] == PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
 135     fh->fmt             = format_by_fourcc(pix_format);
 136
 137     v4l2_prio_open(&dev->prio,&fh->prio);
 138
 139     videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 140                 &dev->pci->dev, &dev->slock,
 141                 V4L2_BUF_TYPE_VIDEO_CAPTURE,
 142                 V4L2_FIELD_INTERLACED,
 143                 sizeof(struct cx25821_buffer),
 144                 fh);
 145
 146     dprintk(1, "post videobuf_queue_init()\n");
 147     unlock_kernel();
 148
 149     return 0;
 150 }
 151
 152 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 153 {
 154     struct cx25821_fh *fh = file->private_data;
 155
 156     switch (fh->type)
 157     {
 158         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 159             if (res_locked(fh->dev, RESOURCE_VIDEO7))
 160                 return -EBUSY;
 161
 162             return videobuf_read_one(&fh->vidq, data, count, ppos, file->f_flags & O_NONBLOCK);
 163
 164         default:
 165             BUG();
 166             return 0;
 167     }
 168 }
 169
 170 static unsigned int video_poll(struct file *file, struct poll_table_struct *wait)
 171 {
 172     struct cx25821_fh *fh = file->private_data;
 173     struct cx25821_buffer *buf;
 174
 175     if (res_check(fh, RESOURCE_VIDEO7)) {
 176         /* streaming capture */
 177         if (list_empty(&fh->vidq.stream))
 178             return POLLERR;
 179         buf = list_entry(fh->vidq.stream.next,
 180             struct cx25821_buffer, vb.stream);
 181     } else {
 182         /* read() capture */
 183         buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 184         if (NULL == buf)
 185             return POLLERR;
 186     }
 187
 188     poll_wait(file, &buf->vb.done, wait);
 189     if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)
 190     {
 191         if( buf->vb.state == VIDEOBUF_DONE )
 192         {
 193             struct cx25821_dev *dev = fh->dev;
 194
 195             if( dev && dev->use_cif_resolution[SRAM_CH07] )
 196             {
 197                 u8 cam_id = *((char*)buf->vb.baddr+3);
 198                 memcpy((char*)buf->vb.baddr, (char*)buf->vb.baddr + (fh->width * 2), (fh->width * 2));
 199                 *((char*)buf->vb.baddr+3) = cam_id;
 200             }
 201         }
 202
 203         return POLLIN|POLLRDNORM;
 204     }
 205
 206     return 0;
 207 }
 208
 209
 210 static int video_release(struct file *file)
 211 {
 212     struct cx25821_fh *fh = file->private_data;
 213     struct cx25821_dev *dev = fh->dev;
 214
 215     //stop the risc engine and fifo
 216     cx_write(channel7->dma_ctl, 0); /* FIFO and RISC disable */
 217
 218     /* stop video capture */
 219     if (res_check(fh, RESOURCE_VIDEO7)) {
 220         videobuf_queue_cancel(&fh->vidq);
 221         res_free(dev, fh, RESOURCE_VIDEO7);
 222     }
 223
 224     if (fh->vidq.read_buf) {
 225         buffer_release(&fh->vidq, fh->vidq.read_buf);
 226         kfree(fh->vidq.read_buf);
 227     }
 228
 229     videobuf_mmap_free(&fh->vidq);
 230
 231     v4l2_prio_close(&dev->prio,&fh->prio);
 232     file->private_data = NULL;
 233     kfree(fh);
 234
 235     return 0;
 236 }
 237
 238
 239 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 240 {
 241     struct cx25821_fh *fh = priv;
 242     struct cx25821_dev *dev = fh->dev;
 243
 244     if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
 245     {
 246         return -EINVAL;
 247     }
 248
 249     if (unlikely(i != fh->type))
 250     {
 251         return -EINVAL;
 252     }
 253
 254     if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO7))))
 255     {
 256         return -EBUSY;
 257     }
 258
 259     return videobuf_streamon(get_queue(fh));
 260 }
 261
 262 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 263 {
 264     struct cx25821_fh *fh = priv;
 265     struct cx25821_dev *dev = fh->dev;
 266     int err, res;
 267
 268     if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 269         return -EINVAL;
 270     if (i != fh->type)
 271         return -EINVAL;
 272
 273     res = get_resource(fh, RESOURCE_VIDEO7);
 274     err = videobuf_streamoff(get_queue(fh));
 275     if (err < 0)
 276         return err;
 277     res_free(dev, fh, res);
 278     return 0;
 279 }
 280
 281
 282 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
 283 {
 284     struct cx25821_fh *fh = priv;
 285     struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
 286     int err;
 287     int pix_format = 0;
 288
 289     if (fh)
 290     {
 291         err = v4l2_prio_check(&dev->prio, &fh->prio);
 292         if (0 != err)
 293             return err;
 294     }
 295
 296     dprintk(2, "%s()\n", __func__);
 297     err = vidioc_try_fmt_vid_cap(file, priv, f);
 298
 299     if (0 != err)
 300         return err;
 301
 302     fh->fmt        = format_by_fourcc(f->fmt.pix.pixelformat);
 303     fh->vidq.field = f->fmt.pix.field;
 304
 305     // check if width and height is valid based on set standard
 306     if (is_valid_width(f->fmt.pix.width, dev->tvnorm))
 307     {
 308         fh->width      = f->fmt.pix.width;
 309     }
 310
 311     if (is_valid_height(f->fmt.pix.height, dev->tvnorm))
 312     {
 313         fh->height     = f->fmt.pix.height;
 314     }
 315
 316     if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 317         pix_format = PIXEL_FRMT_411;
 318     else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
 319         pix_format = PIXEL_FRMT_422;
 320     else
 321         return -EINVAL;
 322
 323     cx25821_set_pixel_format( dev, SRAM_CH07, pix_format );
 324
 325     // check if cif resolution
 326     if (fh->width == 320 || fh->width == 352)
 327     {
 328         dev->use_cif_resolution[SRAM_CH07] = 1;
 329     }else
 330     {
 331         dev->use_cif_resolution[SRAM_CH07] = 0;
 332     }
 333     dev->cif_width[SRAM_CH07]          = fh->width;
 334     medusa_set_resolution( dev, fh->width, SRAM_CH07 );
 335
 336     dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width, fh->height, fh->vidq.field);
 337     cx25821_call_all(dev, video, s_fmt, f);
 338
 339     return 0;
 340 }
 341
 342 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 343 {
 344     int ret_val = 0;
 345     struct cx25821_fh *fh = priv;
 346     struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
 347
 348     ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 349
 350     p->sequence = dev->vidq[SRAM_CH07].count;
 351
 352     return ret_val;
 353 }
 354 static int vidioc_log_status (struct file *file, void *priv)
 355 {
 356     struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
 357     char name[32 + 2];
 358
 359     struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH07];
 360     u32 tmp = 0;
 361
 362     snprintf(name, sizeof(name), "%s/2", dev->name);
 363     printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 364                dev->name);
 365     cx25821_call_all(dev, core, log_status);
 366
 367     tmp = cx_read(sram_ch->dma_ctl);
 368     printk(KERN_INFO "Video input 7 is %s\n", (tmp & 0x11)?"streaming" : "stopped");
 369     printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 370                dev->name);
 371     return 0;
 372 }
 373
 374 static int vidioc_s_ctrl(struct file *file, void *priv,
 375                                 struct v4l2_control *ctl)
 376 {
 377         struct cx25821_fh *fh = priv;
 378         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 379         int err;
 380
 381         if (fh) {
 382                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 383                 if (0 != err)
 384                         return err;
 385         }
 386
 387         return cx25821_set_control(dev, ctl, SRAM_CH07);
 388 }
 389
 390 // exported stuff
 391 static const struct v4l2_file_operations video_fops = {
 392     .owner         = THIS_MODULE,
 393     .open          = video_open,
 394     .release       = video_release,
 395     .read          = video_read,
 396     .poll          = video_poll,
 397     .mmap          = video_mmap,
 398     .ioctl         = video_ioctl2,
 399 };
 400
 401 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 402     .vidioc_querycap      = vidioc_querycap,
 403     .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
 404     .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
 405     .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
 406     .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
 407     .vidioc_reqbufs       = vidioc_reqbufs,
 408     .vidioc_querybuf      = vidioc_querybuf,
 409     .vidioc_qbuf          = vidioc_qbuf,
 410     .vidioc_dqbuf         = vidioc_dqbuf,
 411 #ifdef TUNER_FLAG
 412     .vidioc_s_std         = vidioc_s_std,
 413     .vidioc_querystd      = vidioc_querystd,
 414 #endif
 415     .vidioc_cropcap       = vidioc_cropcap,
 416     .vidioc_s_crop        = vidioc_s_crop,
 417     .vidioc_g_crop        = vidioc_g_crop,
 418     .vidioc_enum_input    = vidioc_enum_input,
 419     .vidioc_g_input       = vidioc_g_input,
 420     .vidioc_s_input       = vidioc_s_input,
 421     .vidioc_g_ctrl        = vidioc_g_ctrl,
 422     .vidioc_s_ctrl        = vidioc_s_ctrl,
 423     .vidioc_queryctrl     = vidioc_queryctrl,
 424     .vidioc_streamon      = vidioc_streamon,
 425     .vidioc_streamoff     = vidioc_streamoff,
 426     .vidioc_log_status    = vidioc_log_status,
 427     .vidioc_g_priority    = vidioc_g_priority,
 428     .vidioc_s_priority    = vidioc_s_priority,
 429 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 430     .vidiocgmbuf          = vidiocgmbuf,
 431 #endif
 432 #ifdef TUNER_FLAG
 433     .vidioc_g_tuner       = vidioc_g_tuner,
 434     .vidioc_s_tuner       = vidioc_s_tuner,
 435     .vidioc_g_frequency   = vidioc_g_frequency,
 436     .vidioc_s_frequency   = vidioc_s_frequency,
 437 #endif
 438 #ifdef CONFIG_VIDEO_ADV_DEBUG
 439     .vidioc_g_register    = vidioc_g_register,
 440     .vidioc_s_register    = vidioc_s_register,
 441 #endif
 442 };
 443
 444 struct video_device cx25821_video_template7 = {
 445     .name                 = "cx25821-video",
 446     .fops                 = &video_fops,
 447     .minor                = -1,
 448     .ioctl_ops            = &video_ioctl_ops,
 449     .tvnorms              = CX25821_NORMS,
 450     .current_norm         = V4L2_STD_NTSC_M,
 451 };
 452
 453
 454