drivers/staging/cx25821/cx25821-vidups9.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_CH09];
  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_CH09]);
  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
 102         printk("open dev=%s type=%s\n", video_device_node_name(vdev),
 103                 v4l2_type_names[type]);
 104
 105         /* allocate + initialize per filehandle data */
 106         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
 107         if (NULL == fh)
 108                 return -ENOMEM;
 109
 110         lock_kernel();
 111
 112         file->private_data = fh;
 113         fh->dev = dev;
 114         fh->type = type;
 115         fh->width = 720;
 116
 117         if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
 118                 fh->height = 576;
 119         else
 120                 fh->height = 480;
 121
 122         dev->channel_opened = 8;
 123         fh->fmt = format_by_fourcc(V4L2_PIX_FMT_YUYV);
 124
 125         v4l2_prio_open(&dev->prio, &fh->prio);
 126
 127         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 128                                &dev->pci->dev, &dev->slock,
 129                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 130                                V4L2_FIELD_INTERLACED,
 131                                sizeof(struct cx25821_buffer), fh);
 132
 133         dprintk(1, "post videobuf_queue_init()\n");
 134         unlock_kernel();
 135
 136         return 0;
 137 }
 138
 139 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 140                           loff_t * ppos)
 141 {
 142         struct cx25821_fh *fh = file->private_data;
 143
 144         switch (fh->type) {
 145         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 146                 if (res_locked(fh->dev, RESOURCE_VIDEO9))
 147                         return -EBUSY;
 148
 149                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 150                                          file->f_flags & O_NONBLOCK);
 151
 152         default:
 153                 BUG();
 154                 return 0;
 155         }
 156 }
 157
 158 static unsigned int video_poll(struct file *file,
 159                                struct poll_table_struct *wait)
 160 {
 161         struct cx25821_fh *fh = file->private_data;
 162         struct cx25821_buffer *buf;
 163
 164         if (res_check(fh, RESOURCE_VIDEO9)) {
 165                 /* streaming capture */
 166                 if (list_empty(&fh->vidq.stream))
 167                         return POLLERR;
 168                 buf = list_entry(fh->vidq.stream.next,
 169                                  struct cx25821_buffer, vb.stream);
 170         } else {
 171                 /* read() capture */
 172                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 173                 if (NULL == buf)
 174                         return POLLERR;
 175         }
 176
 177         poll_wait(file, &buf->vb.done, wait);
 178         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)
 179                 return POLLIN | POLLRDNORM;
 180         return 0;
 181 }
 182
 183 static int video_release(struct file *file)
 184 {
 185         struct cx25821_fh *fh = file->private_data;
 186         struct cx25821_dev *dev = fh->dev;
 187
 188         //stop the risc engine and fifo
 189         //cx_write(channel9->dma_ctl, 0);
 190
 191         /* stop video capture */
 192         if (res_check(fh, RESOURCE_VIDEO9)) {
 193                 videobuf_queue_cancel(&fh->vidq);
 194                 res_free(dev, fh, RESOURCE_VIDEO9);
 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_VIDEO9)))) {
 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_VIDEO9);
 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 long video_ioctl_upstream9(struct file *file, unsigned int cmd,
 252                                   unsigned long arg)
 253 {
 254         struct cx25821_fh *fh = file->private_data;
 255         struct cx25821_dev *dev = fh->dev;
 256         int command = 0;
 257         struct upstream_user_struct *data_from_user;
 258
 259         data_from_user = (struct upstream_user_struct *)arg;
 260
 261         if (!data_from_user) {
 262                 printk
 263                     ("cx25821 in %s(): Upstream data is INVALID. Returning.\n",
 264                      __func__);
 265                 return 0;
 266         }
 267
 268         command = data_from_user->command;
 269
 270         if (command != UPSTREAM_START_VIDEO && command != UPSTREAM_STOP_VIDEO) {
 271                 return 0;
 272         }
 273
 274         dev->input_filename = data_from_user->input_filename;
 275         dev->input_audiofilename = data_from_user->input_filename;
 276         dev->vid_stdname = data_from_user->vid_stdname;
 277         dev->pixel_format = data_from_user->pixel_format;
 278         dev->channel_select = data_from_user->channel_select;
 279         dev->command = data_from_user->command;
 280
 281         switch (command) {
 282         case UPSTREAM_START_VIDEO:
 283                 cx25821_start_upstream_video_ch1(dev, data_from_user);
 284                 break;
 285
 286         case UPSTREAM_STOP_VIDEO:
 287                 cx25821_stop_upstream_video_ch1(dev);
 288                 break;
 289         }
 290
 291         return 0;
 292 }
 293
 294 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 295                                 struct v4l2_format *f)
 296 {
 297         struct cx25821_fh *fh = priv;
 298         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 299         int err;
 300
 301         if (fh) {
 302                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 303                 if (0 != err)
 304                         return err;
 305         }
 306
 307         dprintk(2, "%s()\n", __func__);
 308         err = vidioc_try_fmt_vid_cap(file, priv, f);
 309
 310         if (0 != err)
 311                 return err;
 312         fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 313         fh->width = f->fmt.pix.width;
 314         fh->height = f->fmt.pix.height;
 315         fh->vidq.field = f->fmt.pix.field;
 316         dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
 317                 fh->height, fh->vidq.field);
 318         cx25821_call_all(dev, video, s_fmt, f);
 319         return 0;
 320 }
 321
 322 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 323 {
 324         struct cx25821_fh *fh = priv;
 325         return videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 326 }
 327 static int vidioc_log_status(struct file *file, void *priv)
 328 {
 329         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 330         char name[32 + 2];
 331
 332         snprintf(name, sizeof(name), "%s/2", dev->name);
 333         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 334                dev->name);
 335         cx25821_call_all(dev, core, log_status);
 336         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 337                dev->name);
 338         return 0;
 339 }
 340
 341 static int vidioc_s_ctrl(struct file *file, void *priv,
 342                          struct v4l2_control *ctl)
 343 {
 344         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 345         struct cx25821_fh *fh = priv;
 346         int err;
 347         if (fh) {
 348                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 349                 if (0 != err)
 350                         return err;
 351         }
 352
 353         return 0;
 354 }
 355
 356 // exported stuff
 357 static const struct v4l2_file_operations video_fops = {
 358         .owner = THIS_MODULE,
 359         .open = video_open,
 360         .release = video_release,
 361         .read = video_read,
 362         .poll = video_poll,
 363         .mmap = video_mmap,
 364         .ioctl = video_ioctl_upstream9,
 365 };
 366
 367 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 368         .vidioc_querycap = vidioc_querycap,
 369         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 370         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 371         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 372         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 373         .vidioc_reqbufs = vidioc_reqbufs,
 374         .vidioc_querybuf = vidioc_querybuf,
 375         .vidioc_qbuf = vidioc_qbuf,
 376         .vidioc_dqbuf = vidioc_dqbuf,
 377 #ifdef TUNER_FLAG
 378         .vidioc_s_std = vidioc_s_std,
 379         .vidioc_querystd = vidioc_querystd,
 380 #endif
 381         .vidioc_cropcap = vidioc_cropcap,
 382         .vidioc_s_crop = vidioc_s_crop,
 383         .vidioc_g_crop = vidioc_g_crop,
 384         .vidioc_enum_input = vidioc_enum_input,
 385         .vidioc_g_input = vidioc_g_input,
 386         .vidioc_s_input = vidioc_s_input,
 387         .vidioc_g_ctrl = vidioc_g_ctrl,
 388         .vidioc_s_ctrl = vidioc_s_ctrl,
 389         .vidioc_queryctrl = vidioc_queryctrl,
 390         .vidioc_streamon = vidioc_streamon,
 391         .vidioc_streamoff = vidioc_streamoff,
 392         .vidioc_log_status = vidioc_log_status,
 393         .vidioc_g_priority = vidioc_g_priority,
 394         .vidioc_s_priority = vidioc_s_priority,
 395 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 396         .vidiocgmbuf = vidiocgmbuf,
 397 #endif
 398 #ifdef TUNER_FLAG
 399         .vidioc_g_tuner = vidioc_g_tuner,
 400         .vidioc_s_tuner = vidioc_s_tuner,
 401         .vidioc_g_frequency = vidioc_g_frequency,
 402         .vidioc_s_frequency = vidioc_s_frequency,
 403 #endif
 404 #ifdef CONFIG_VIDEO_ADV_DEBUG
 405         .vidioc_g_register = vidioc_g_register,
 406         .vidioc_s_register = vidioc_s_register,
 407 #endif
 408 };
 409
 410 struct video_device cx25821_video_template9 = {
 411         .name = "cx25821-upstream9",
 412         .fops = &video_fops,
 413         .ioctl_ops = &video_ioctl_ops,
 414         .tvnorms = CX25821_NORMS,
 415         .current_norm = V4L2_STD_NTSC_M,
 416 };