drivers/staging/cx25821/cx25821-video2.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_CH02];
  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_CH02]);
  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 = cx25821_buffer_setup,
  90         .buf_prepare = cx25821_buffer_prepare,
  91         .buf_queue = buffer_queue,
  92         .buf_release = cx25821_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_CH02;
 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
 131         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 132                                &dev->pci->dev, &dev->slock,
 133                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 134                                V4L2_FIELD_INTERLACED,
 135                                sizeof(struct cx25821_buffer), fh);
 136
 137         dprintk(1, "post videobuf_queue_init()\n");
 138         unlock_kernel();
 139
 140         return 0;
 141 }
 142
 143 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 144                           loff_t * ppos)
 145 {
 146         struct cx25821_fh *fh = file->private_data;
 147
 148         switch (fh->type) {
 149         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 150                 if (cx25821_res_locked(fh->dev, RESOURCE_VIDEO2))
 151                         return -EBUSY;
 152
 153                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 154                                          file->f_flags & O_NONBLOCK);
 155
 156         default:
 157                 BUG();
 158                 return 0;
 159         }
 160 }
 161
 162 static unsigned int video_poll(struct file *file,
 163                                struct poll_table_struct *wait)
 164 {
 165         struct cx25821_fh *fh = file->private_data;
 166         struct cx25821_buffer *buf;
 167
 168         if (cx25821_res_check(fh, RESOURCE_VIDEO2)) {
 169                 /* streaming capture */
 170                 if (list_empty(&fh->vidq.stream))
 171                         return POLLERR;
 172                 buf = list_entry(fh->vidq.stream.next,
 173                                  struct cx25821_buffer, vb.stream);
 174         } else {
 175                 /* read() capture */
 176                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 177                 if (NULL == buf)
 178                         return POLLERR;
 179         }
 180
 181         poll_wait(file, &buf->vb.done, wait);
 182         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) {
 183                 if (buf->vb.state == VIDEOBUF_DONE) {
 184                         struct cx25821_dev *dev = fh->dev;
 185
 186                         if (dev && dev->use_cif_resolution[SRAM_CH02]) {
 187                                 u8 cam_id = *((char *)buf->vb.baddr + 3);
 188                                 memcpy((char *)buf->vb.baddr,
 189                                        (char *)buf->vb.baddr + (fh->width * 2),
 190                                        (fh->width * 2));
 191                                 *((char *)buf->vb.baddr + 3) = cam_id;
 192                         }
 193                 }
 194
 195                 return POLLIN | POLLRDNORM;
 196         }
 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 the risc engine and fifo
 207         cx_write(channel2->dma_ctl, 0); /* FIFO and RISC disable */
 208
 209         /* stop video capture */
 210         if (cx25821_res_check(fh, RESOURCE_VIDEO2)) {
 211                 videobuf_queue_cancel(&fh->vidq);
 212                 cx25821_res_free(dev, fh, RESOURCE_VIDEO2);
 213         }
 214
 215         if (fh->vidq.read_buf) {
 216                 cx25821_buffer_release(&fh->vidq, fh->vidq.read_buf);
 217                 kfree(fh->vidq.read_buf);
 218         }
 219
 220         videobuf_mmap_free(&fh->vidq);
 221
 222         v4l2_prio_close(&dev->prio, fh->prio);
 223         file->private_data = NULL;
 224         kfree(fh);
 225
 226         return 0;
 227 }
 228
 229 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 230 {
 231         struct cx25821_fh *fh = priv;
 232         struct cx25821_dev *dev = fh->dev;
 233
 234         if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 235                 return -EINVAL;
 236         }
 237
 238         if (unlikely(i != fh->type)) {
 239                 return -EINVAL;
 240         }
 241
 242         if (unlikely(!cx25821_res_get(dev, fh, cx25821_get_resource(fh, RESOURCE_VIDEO2)))) {
 243                 return -EBUSY;
 244         }
 245
 246         return videobuf_streamon(get_queue(fh));
 247 }
 248
 249 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 250 {
 251         struct cx25821_fh *fh = priv;
 252         struct cx25821_dev *dev = fh->dev;
 253         int err, res;
 254
 255         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 256                 return -EINVAL;
 257         if (i != fh->type)
 258                 return -EINVAL;
 259
 260         res = cx25821_get_resource(fh, RESOURCE_VIDEO2);
 261         err = videobuf_streamoff(get_queue(fh));
 262         if (err < 0)
 263                 return err;
 264         cx25821_res_free(dev, fh, res);
 265         return 0;
 266 }
 267
 268 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 269                                 struct v4l2_format *f)
 270 {
 271         struct cx25821_fh *fh = priv;
 272         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 273         int err;
 274         int pix_format = 0;
 275
 276         if (fh) {
 277                 err = v4l2_prio_check(&dev->prio, fh->prio);
 278                 if (0 != err)
 279                         return err;
 280         }
 281
 282         dprintk(2, "%s()\n", __func__);
 283         err = cx25821_vidioc_try_fmt_vid_cap(file, priv, f);
 284
 285         if (0 != err)
 286                 return err;
 287
 288         fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 289         fh->vidq.field = f->fmt.pix.field;
 290
 291         // check if width and height is valid based on set standard
 292         if (cx25821_is_valid_width(f->fmt.pix.width, dev->tvnorm)) {
 293                 fh->width = f->fmt.pix.width;
 294         }
 295
 296         if (cx25821_is_valid_height(f->fmt.pix.height, dev->tvnorm)) {
 297                 fh->height = f->fmt.pix.height;
 298         }
 299
 300         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 301                 pix_format = PIXEL_FRMT_411;
 302         else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
 303                 pix_format = PIXEL_FRMT_422;
 304         else
 305                 return -EINVAL;
 306
 307         cx25821_set_pixel_format(dev, SRAM_CH02, pix_format);
 308
 309         // check if cif resolution
 310         if (fh->width == 320 || fh->width == 352) {
 311                 dev->use_cif_resolution[SRAM_CH02] = 1;
 312         } else {
 313                 dev->use_cif_resolution[SRAM_CH02] = 0;
 314         }
 315         dev->cif_width[SRAM_CH02] = fh->width;
 316         medusa_set_resolution(dev, fh->width, SRAM_CH02);
 317
 318         dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
 319                 fh->height, fh->vidq.field);
 320         cx25821_call_all(dev, video, s_fmt, f);
 321
 322         return 0;
 323 }
 324
 325 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 326 {
 327         int ret_val = 0;
 328         struct cx25821_fh *fh = priv;
 329         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 330
 331         ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 332
 333         p->sequence = dev->vidq[SRAM_CH02].count;
 334
 335         return ret_val;
 336 }
 337
 338 static int vidioc_log_status(struct file *file, void *priv)
 339 {
 340         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 341         char name[32 + 2];
 342
 343         struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH02];
 344         u32 tmp = 0;
 345
 346         snprintf(name, sizeof(name), "%s/2", dev->name);
 347         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 348                dev->name);
 349
 350         cx25821_call_all(dev, core, log_status);
 351
 352         tmp = cx_read(sram_ch->dma_ctl);
 353         printk(KERN_INFO "Video input 2 is %s\n",
 354                (tmp & 0x11) ? "streaming" : "stopped");
 355         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 356                dev->name);
 357         return 0;
 358 }
 359
 360 static int vidioc_s_ctrl(struct file *file, void *priv,
 361                          struct v4l2_control *ctl)
 362 {
 363         struct cx25821_fh *fh = priv;
 364         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 365         int err;
 366
 367         if (fh) {
 368                 err = v4l2_prio_check(&dev->prio, fh->prio);
 369                 if (0 != err)
 370                         return err;
 371         }
 372
 373         return cx25821_set_control(dev, ctl, SRAM_CH02);
 374 }
 375
 376 // exported stuff
 377 static const struct v4l2_file_operations video_fops = {
 378         .owner = THIS_MODULE,
 379         .open = video_open,
 380         .release = video_release,
 381         .read = video_read,
 382         .poll = video_poll,
 383         .mmap = cx25821_video_mmap,
 384         .ioctl = video_ioctl2,
 385 };
 386
 387 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 388         .vidioc_querycap = cx25821_vidioc_querycap,
 389         .vidioc_enum_fmt_vid_cap = cx25821_vidioc_enum_fmt_vid_cap,
 390         .vidioc_g_fmt_vid_cap = cx25821_vidioc_g_fmt_vid_cap,
 391         .vidioc_try_fmt_vid_cap = cx25821_vidioc_try_fmt_vid_cap,
 392         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 393         .vidioc_reqbufs = cx25821_vidioc_reqbufs,
 394         .vidioc_querybuf = cx25821_vidioc_querybuf,
 395         .vidioc_qbuf = cx25821_vidioc_qbuf,
 396         .vidioc_dqbuf = vidioc_dqbuf,
 397 #ifdef TUNER_FLAG
 398         .vidioc_s_std = cx25821_vidioc_s_std,
 399         .vidioc_querystd = cx25821_vidioc_querystd,
 400 #endif
 401         .vidioc_cropcap = cx25821_vidioc_cropcap,
 402         .vidioc_s_crop = cx25821_vidioc_s_crop,
 403         .vidioc_g_crop = cx25821_vidioc_g_crop,
 404         .vidioc_enum_input = cx25821_vidioc_enum_input,
 405         .vidioc_g_input = cx25821_vidioc_g_input,
 406         .vidioc_s_input = cx25821_vidioc_s_input,
 407         .vidioc_g_ctrl = cx25821_vidioc_g_ctrl,
 408         .vidioc_s_ctrl = vidioc_s_ctrl,
 409         .vidioc_queryctrl = cx25821_vidioc_queryctrl,
 410         .vidioc_streamon = vidioc_streamon,
 411         .vidioc_streamoff = vidioc_streamoff,
 412         .vidioc_log_status = vidioc_log_status,
 413         .vidioc_g_priority = cx25821_vidioc_g_priority,
 414         .vidioc_s_priority = cx25821_vidioc_s_priority,
 415 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 416         .vidiocgmbuf = cx25821_vidiocgmbuf,
 417 #endif
 418 #ifdef TUNER_FLAG
 419         .vidioc_g_tuner = cx25821_vidioc_g_tuner,
 420         .vidioc_s_tuner = cx25821_vidioc_s_tuner,
 421         .vidioc_g_frequency = cx25821_vidioc_g_frequency,
 422         .vidioc_s_frequency = cx25821_vidioc_s_frequency,
 423 #endif
 424 #ifdef CONFIG_VIDEO_ADV_DEBUG
 425         .vidioc_g_register = cx25821_vidioc_g_register,
 426         .vidioc_s_register = cx25821_vidioc_s_register,
 427 #endif
 428 };
 429
 430 struct video_device cx25821_video_template2 = {
 431         .name = "cx25821-video",
 432         .fops = &video_fops,
 433         .ioctl_ops = &video_ioctl_ops,
 434         .tvnorms = CX25821_NORMS,
 435         .current_norm = V4L2_STD_NTSC_M,
 436 };