drivers/staging/cx25821/cx25821-video4.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[SRAM_CH04];
  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[SRAM_CH04]);
  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 = SRAM_CH04;
 124         pix_format =
 125             (dev->pixel_formats[dev->channel_opened] ==
 126              PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
 127         fh->fmt = format_by_fourcc(pix_format);
 128
 129         v4l2_prio_open(&dev->prio, &fh->prio);
 130         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 131                                &dev->pci->dev, &dev->slock,
 132                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 133                                V4L2_FIELD_INTERLACED,
 134                                sizeof(struct cx25821_buffer), fh);
 135
 136         dprintk(1, "post videobuf_queue_init()\n");
 137         unlock_kernel();
 138
 139         return 0;
 140 }
 141
 142 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 143                           loff_t * ppos)
 144 {
 145         struct cx25821_fh *fh = file->private_data;
 146
 147         switch (fh->type) {
 148         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 149                 if (res_locked(fh->dev, RESOURCE_VIDEO4))
 150                         return -EBUSY;
 151
 152                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 153                                          file->f_flags & O_NONBLOCK);
 154
 155         default:
 156                 BUG();
 157                 return 0;
 158         }
 159 }
 160
 161 static unsigned int video_poll(struct file *file,
 162                                struct poll_table_struct *wait)
 163 {
 164         struct cx25821_fh *fh = file->private_data;
 165         struct cx25821_buffer *buf;
 166
 167         if (res_check(fh, RESOURCE_VIDEO4)) {
 168                 /* streaming capture */
 169                 if (list_empty(&fh->vidq.stream))
 170                         return POLLERR;
 171                 buf = list_entry(fh->vidq.stream.next,
 172                                  struct cx25821_buffer, vb.stream);
 173         } else {
 174                 /* read() capture */
 175                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 176                 if (NULL == buf)
 177                         return POLLERR;
 178         }
 179
 180         poll_wait(file, &buf->vb.done, wait);
 181         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) {
 182                 if (buf->vb.state == VIDEOBUF_DONE) {
 183                         struct cx25821_dev *dev = fh->dev;
 184
 185                         if (dev && dev->use_cif_resolution[SRAM_CH04]) {
 186                                 u8 cam_id = *((char *)buf->vb.baddr + 3);
 187                                 memcpy((char *)buf->vb.baddr,
 188                                        (char *)buf->vb.baddr + (fh->width * 2),
 189                                        (fh->width * 2));
 190                                 *((char *)buf->vb.baddr + 3) = cam_id;
 191                         }
 192                 }
 193
 194                 return POLLIN | POLLRDNORM;
 195         }
 196
 197         return 0;
 198 }
 199
 200 static int video_release(struct file *file)
 201 {
 202         struct cx25821_fh *fh = file->private_data;
 203         struct cx25821_dev *dev = fh->dev;
 204
 205         //stop the risc engine and fifo
 206         cx_write(channel4->dma_ctl, 0); /* FIFO and RISC disable */
 207
 208         /* stop video capture */
 209         if (res_check(fh, RESOURCE_VIDEO4)) {
 210                 videobuf_queue_cancel(&fh->vidq);
 211                 res_free(dev, fh, RESOURCE_VIDEO4);
 212         }
 213
 214         if (fh->vidq.read_buf) {
 215                 buffer_release(&fh->vidq, fh->vidq.read_buf);
 216                 kfree(fh->vidq.read_buf);
 217         }
 218
 219         videobuf_mmap_free(&fh->vidq);
 220
 221         v4l2_prio_close(&dev->prio, &fh->prio);
 222         file->private_data = NULL;
 223         kfree(fh);
 224
 225         return 0;
 226 }
 227
 228 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 229 {
 230         struct cx25821_fh *fh = priv;
 231         struct cx25821_dev *dev = fh->dev;
 232
 233         if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 234                 return -EINVAL;
 235         }
 236
 237         if (unlikely(i != fh->type)) {
 238                 return -EINVAL;
 239         }
 240
 241         if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO4)))) {
 242                 return -EBUSY;
 243         }
 244
 245         return videobuf_streamon(get_queue(fh));
 246 }
 247
 248 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 249 {
 250         struct cx25821_fh *fh = priv;
 251         struct cx25821_dev *dev = fh->dev;
 252         int err, res;
 253
 254         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 255                 return -EINVAL;
 256         if (i != fh->type)
 257                 return -EINVAL;
 258
 259         res = get_resource(fh, RESOURCE_VIDEO4);
 260         err = videobuf_streamoff(get_queue(fh));
 261         if (err < 0)
 262                 return err;
 263         res_free(dev, fh, res);
 264         return 0;
 265 }
 266
 267 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 268                                 struct v4l2_format *f)
 269 {
 270         struct cx25821_fh *fh = priv;
 271         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 272         int err;
 273         int pix_format = 0;
 274
 275         // check priority
 276         if (fh) {
 277                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 278                 if (0 != err)
 279                         return err;
 280         }
 281         dprintk(2, "%s()\n", __func__);
 282         err = vidioc_try_fmt_vid_cap(file, priv, f);
 283
 284         if (0 != err)
 285                 return err;
 286
 287         fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 288         fh->vidq.field = f->fmt.pix.field;
 289
 290         // check if width and height is valid based on set standard
 291         if (is_valid_width(f->fmt.pix.width, dev->tvnorm)) {
 292                 fh->width = f->fmt.pix.width;
 293         }
 294
 295         if (is_valid_height(f->fmt.pix.height, dev->tvnorm)) {
 296                 fh->height = f->fmt.pix.height;
 297         }
 298
 299         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 300                 pix_format = PIXEL_FRMT_411;
 301         else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
 302                 pix_format = PIXEL_FRMT_422;
 303         else
 304                 return -EINVAL;
 305
 306         cx25821_set_pixel_format(dev, SRAM_CH04, pix_format);
 307
 308         // check if cif resolution
 309         if (fh->width == 320 || fh->width == 352) {
 310                 dev->use_cif_resolution[SRAM_CH04] = 1;
 311         } else {
 312                 dev->use_cif_resolution[SRAM_CH04] = 0;
 313         }
 314         dev->cif_width[SRAM_CH04] = fh->width;
 315         medusa_set_resolution(dev, fh->width, SRAM_CH04);
 316
 317         dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
 318                 fh->height, fh->vidq.field);
 319         cx25821_call_all(dev, video, s_fmt, f);
 320
 321         return 0;
 322 }
 323
 324 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 325 {
 326         int ret_val = 0;
 327         struct cx25821_fh *fh = priv;
 328         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 329
 330         ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 331
 332         p->sequence = dev->vidq[SRAM_CH04].count;
 333
 334         return ret_val;
 335 }
 336
 337 static int vidioc_log_status(struct file *file, void *priv)
 338 {
 339         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 340         char name[32 + 2];
 341
 342         struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH04];
 343         u32 tmp = 0;
 344
 345         snprintf(name, sizeof(name), "%s/2", dev->name);
 346         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 347                dev->name);
 348         cx25821_call_all(dev, core, log_status);
 349
 350         tmp = cx_read(sram_ch->dma_ctl);
 351         printk(KERN_INFO "Video input 4 is %s\n",
 352                (tmp & 0x11) ? "streaming" : "stopped");
 353         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 354                dev->name);
 355         return 0;
 356 }
 357
 358 static int vidioc_s_ctrl(struct file *file, void *priv,
 359                          struct v4l2_control *ctl)
 360 {
 361         struct cx25821_fh *fh = priv;
 362         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 363         int err;
 364
 365         if (fh) {
 366                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 367                 if (0 != err)
 368                         return err;
 369         }
 370
 371         return cx25821_set_control(dev, ctl, SRAM_CH04);
 372 }
 373
 374 // exported stuff
 375 static const struct v4l2_file_operations video_fops = {
 376         .owner = THIS_MODULE,
 377         .open = video_open,
 378         .release = video_release,
 379         .read = video_read,
 380         .poll = video_poll,
 381         .mmap = video_mmap,
 382         .ioctl = video_ioctl2,
 383 };
 384
 385 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 386         .vidioc_querycap = vidioc_querycap,
 387         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 388         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 389         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 390         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 391         .vidioc_reqbufs = vidioc_reqbufs,
 392         .vidioc_querybuf = vidioc_querybuf,
 393         .vidioc_qbuf = vidioc_qbuf,
 394         .vidioc_dqbuf = vidioc_dqbuf,
 395 #ifdef TUNER_FLAG
 396         .vidioc_s_std = vidioc_s_std,
 397         .vidioc_querystd = vidioc_querystd,
 398 #endif
 399         .vidioc_cropcap = vidioc_cropcap,
 400         .vidioc_s_crop = vidioc_s_crop,
 401         .vidioc_g_crop = vidioc_g_crop,
 402         .vidioc_enum_input = vidioc_enum_input,
 403         .vidioc_g_input = vidioc_g_input,
 404         .vidioc_s_input = vidioc_s_input,
 405         .vidioc_g_ctrl = vidioc_g_ctrl,
 406         .vidioc_s_ctrl = vidioc_s_ctrl,
 407         .vidioc_queryctrl = vidioc_queryctrl,
 408         .vidioc_streamon = vidioc_streamon,
 409         .vidioc_streamoff = vidioc_streamoff,
 410         .vidioc_log_status = vidioc_log_status,
 411         .vidioc_g_priority = vidioc_g_priority,
 412         .vidioc_s_priority = vidioc_s_priority,
 413 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 414         .vidiocgmbuf = vidiocgmbuf,
 415 #endif
 416 #ifdef TUNER_FLAG
 417         .vidioc_g_tuner = vidioc_g_tuner,
 418         .vidioc_s_tuner = vidioc_s_tuner,
 419         .vidioc_g_frequency = vidioc_g_frequency,
 420         .vidioc_s_frequency = vidioc_s_frequency,
 421 #endif
 422 #ifdef CONFIG_VIDEO_ADV_DEBUG
 423         .vidioc_g_register = vidioc_g_register,
 424         .vidioc_s_register = vidioc_s_register,
 425 #endif
 426 };
 427
 428 struct video_device cx25821_video_template4 = {
 429         .name = "cx25821-video",
 430         .fops = &video_fops,
 431         .ioctl_ops = &video_ioctl_ops,
 432         .tvnorms = CX25821_NORMS,
 433         .current_norm = V4L2_STD_NTSC_M,
 434 };