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         int minor = video_devdata(file)->minor;
  98         struct cx25821_dev *h, *dev = NULL;
  99         struct cx25821_fh *fh;
 100         struct list_head *list;
 101         enum v4l2_buf_type type = 0;
 102
 103         lock_kernel();
 104         list_for_each(list, &cx25821_devlist) {
 105                 h = list_entry(list, struct cx25821_dev, devlist);
 106
 107                 if (h->video_dev[SRAM_CH09]
 108                     && h->video_dev[SRAM_CH09]->minor == minor) {
 109                         dev = h;
 110                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 111                 }
 112         }
 113
 114         if (NULL == dev) {
 115                 unlock_kernel();
 116                 return -ENODEV;
 117         }
 118
 119         printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);
 120
 121         /* allocate + initialize per filehandle data */
 122         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
 123         if (NULL == fh) {
 124                 unlock_kernel();
 125                 return -ENOMEM;
 126         }
 127
 128         file->private_data = fh;
 129         fh->dev = dev;
 130         fh->type = type;
 131         fh->width = 720;
 132
 133         if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
 134                 fh->height = 576;
 135         else
 136                 fh->height = 480;
 137
 138         dev->channel_opened = 8;
 139         fh->fmt = format_by_fourcc(V4L2_PIX_FMT_YUYV);
 140
 141         v4l2_prio_open(&dev->prio, &fh->prio);
 142
 143         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 144                                &dev->pci->dev, &dev->slock,
 145                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 146                                V4L2_FIELD_INTERLACED,
 147                                sizeof(struct cx25821_buffer), fh);
 148
 149         dprintk(1, "post videobuf_queue_init()\n");
 150         unlock_kernel();
 151
 152         return 0;
 153 }
 154
 155 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 156                           loff_t * ppos)
 157 {
 158         struct cx25821_fh *fh = file->private_data;
 159
 160         switch (fh->type) {
 161         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 162                 if (res_locked(fh->dev, RESOURCE_VIDEO9))
 163                         return -EBUSY;
 164
 165                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 166                                          file->f_flags & O_NONBLOCK);
 167
 168         default:
 169                 BUG();
 170                 return 0;
 171         }
 172 }
 173
 174 static unsigned int video_poll(struct file *file,
 175                                struct poll_table_struct *wait)
 176 {
 177         struct cx25821_fh *fh = file->private_data;
 178         struct cx25821_buffer *buf;
 179
 180         if (res_check(fh, RESOURCE_VIDEO9)) {
 181                 /* streaming capture */
 182                 if (list_empty(&fh->vidq.stream))
 183                         return POLLERR;
 184                 buf = list_entry(fh->vidq.stream.next,
 185                                  struct cx25821_buffer, vb.stream);
 186         } else {
 187                 /* read() capture */
 188                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 189                 if (NULL == buf)
 190                         return POLLERR;
 191         }
 192
 193         poll_wait(file, &buf->vb.done, wait);
 194         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)
 195                 return POLLIN | POLLRDNORM;
 196         return 0;
 197 }
 198
 199 static int video_release(struct file *file)
 200 {
 201         struct cx25821_fh *fh = file->private_data;
 202         struct cx25821_dev *dev = fh->dev;
 203
 204         //stop the risc engine and fifo
 205         //cx_write(channel9->dma_ctl, 0);
 206
 207         /* stop video capture */
 208         if (res_check(fh, RESOURCE_VIDEO9)) {
 209                 videobuf_queue_cancel(&fh->vidq);
 210                 res_free(dev, fh, RESOURCE_VIDEO9);
 211         }
 212
 213         if (fh->vidq.read_buf) {
 214                 buffer_release(&fh->vidq, fh->vidq.read_buf);
 215                 kfree(fh->vidq.read_buf);
 216         }
 217
 218         videobuf_mmap_free(&fh->vidq);
 219
 220         v4l2_prio_close(&dev->prio, &fh->prio);
 221
 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_VIDEO9)))) {
 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_VIDEO9);
 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 long video_ioctl_upstream9(struct file *file, unsigned int cmd,
 268                                   unsigned long arg)
 269 {
 270         struct cx25821_fh *fh = file->private_data;
 271         struct cx25821_dev *dev = fh->dev;
 272         int command = 0;
 273         struct upstream_user_struct *data_from_user;
 274
 275         data_from_user = (struct upstream_user_struct *)arg;
 276
 277         if (!data_from_user) {
 278                 printk
 279                     ("cx25821 in %s(): Upstream data is INVALID. Returning.\n",
 280                      __func__);
 281                 return 0;
 282         }
 283
 284         command = data_from_user->command;
 285
 286         if (command != UPSTREAM_START_VIDEO && command != UPSTREAM_STOP_VIDEO) {
 287                 return 0;
 288         }
 289
 290         dev->input_filename = data_from_user->input_filename;
 291         dev->input_audiofilename = data_from_user->input_filename;
 292         dev->vid_stdname = data_from_user->vid_stdname;
 293         dev->pixel_format = data_from_user->pixel_format;
 294         dev->channel_select = data_from_user->channel_select;
 295         dev->command = data_from_user->command;
 296
 297         switch (command) {
 298         case UPSTREAM_START_VIDEO:
 299                 cx25821_start_upstream_video_ch1(dev, data_from_user);
 300                 break;
 301
 302         case UPSTREAM_STOP_VIDEO:
 303                 cx25821_stop_upstream_video_ch1(dev);
 304                 break;
 305         }
 306
 307         return 0;
 308 }
 309
 310 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 311                                 struct v4l2_format *f)
 312 {
 313         struct cx25821_fh *fh = priv;
 314         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 315         int err;
 316
 317         if (fh) {
 318                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 319                 if (0 != err)
 320                         return err;
 321         }
 322
 323         dprintk(2, "%s()\n", __func__);
 324         err = vidioc_try_fmt_vid_cap(file, priv, f);
 325
 326         if (0 != err)
 327                 return err;
 328         fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 329         fh->width = f->fmt.pix.width;
 330         fh->height = f->fmt.pix.height;
 331         fh->vidq.field = f->fmt.pix.field;
 332         dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
 333                 fh->height, fh->vidq.field);
 334         cx25821_call_all(dev, video, s_fmt, f);
 335         return 0;
 336 }
 337
 338 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 339 {
 340         struct cx25821_fh *fh = priv;
 341         return videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 342 }
 343 static int vidioc_log_status(struct file *file, void *priv)
 344 {
 345         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 346         char name[32 + 2];
 347
 348         snprintf(name, sizeof(name), "%s/2", dev->name);
 349         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 350                dev->name);
 351         cx25821_call_all(dev, core, log_status);
 352         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 353                dev->name);
 354         return 0;
 355 }
 356
 357 static int vidioc_s_ctrl(struct file *file, void *priv,
 358                          struct v4l2_control *ctl)
 359 {
 360         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 361         struct cx25821_fh *fh = priv;
 362         int err;
 363         if (fh) {
 364                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 365                 if (0 != err)
 366                         return err;
 367         }
 368
 369         return 0;
 370 }
 371
 372 // exported stuff
 373 static const struct v4l2_file_operations video_fops = {
 374         .owner = THIS_MODULE,
 375         .open = video_open,
 376         .release = video_release,
 377         .read = video_read,
 378         .poll = video_poll,
 379         .mmap = video_mmap,
 380         .ioctl = video_ioctl_upstream9,
 381 };
 382
 383 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 384         .vidioc_querycap = vidioc_querycap,
 385         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 386         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 387         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 388         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 389         .vidioc_reqbufs = vidioc_reqbufs,
 390         .vidioc_querybuf = vidioc_querybuf,
 391         .vidioc_qbuf = vidioc_qbuf,
 392         .vidioc_dqbuf = vidioc_dqbuf,
 393 #ifdef TUNER_FLAG
 394         .vidioc_s_std = vidioc_s_std,
 395         .vidioc_querystd = vidioc_querystd,
 396 #endif
 397         .vidioc_cropcap = vidioc_cropcap,
 398         .vidioc_s_crop = vidioc_s_crop,
 399         .vidioc_g_crop = vidioc_g_crop,
 400         .vidioc_enum_input = vidioc_enum_input,
 401         .vidioc_g_input = vidioc_g_input,
 402         .vidioc_s_input = vidioc_s_input,
 403         .vidioc_g_ctrl = vidioc_g_ctrl,
 404         .vidioc_s_ctrl = vidioc_s_ctrl,
 405         .vidioc_queryctrl = vidioc_queryctrl,
 406         .vidioc_streamon = vidioc_streamon,
 407         .vidioc_streamoff = vidioc_streamoff,
 408         .vidioc_log_status = vidioc_log_status,
 409         .vidioc_g_priority = vidioc_g_priority,
 410         .vidioc_s_priority = vidioc_s_priority,
 411 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 412         .vidiocgmbuf = vidiocgmbuf,
 413 #endif
 414 #ifdef TUNER_FLAG
 415         .vidioc_g_tuner = vidioc_g_tuner,
 416         .vidioc_s_tuner = vidioc_s_tuner,
 417         .vidioc_g_frequency = vidioc_g_frequency,
 418         .vidioc_s_frequency = vidioc_s_frequency,
 419 #endif
 420 #ifdef CONFIG_VIDEO_ADV_DEBUG
 421         .vidioc_g_register = vidioc_g_register,
 422         .vidioc_s_register = vidioc_s_register,
 423 #endif
 424 };
 425
 426 struct video_device cx25821_video_template9 = {
 427         .name = "cx25821-upstream9",
 428         .fops = &video_fops,
 429         .minor = -1,
 430         .ioctl_ops = &video_ioctl_ops,
 431         .tvnorms = CX25821_NORMS,
 432         .current_norm = V4L2_STD_NTSC_M,
 433 };