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 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_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,
  45                         buf->vb.i);
  46
  47         } else if (list_empty(&q->active)) {
  48                 list_add_tail(&buf->vb.queue, &q->active);
  49                 cx25821_start_video_dma(dev, q, buf,
  50                                         &dev->sram_channels[SRAM_CH07]);
  51                 buf->vb.state = VIDEOBUF_ACTIVE;
  52                 buf->count = q->count++;
  53                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
  54                 dprintk(2,
  55                         "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
  56                         buf, buf->vb.i, buf->count, q->count);
  57         } else {
  58                 prev =
  59                     list_entry(q->active.prev, struct cx25821_buffer, vb.queue);
  60                 if (prev->vb.width == buf->vb.width
  61                     && prev->vb.height == buf->vb.height
  62                     && prev->fmt == buf->fmt) {
  63                         list_add_tail(&buf->vb.queue, &q->active);
  64                         buf->vb.state = VIDEOBUF_ACTIVE;
  65                         buf->count = q->count++;
  66                         prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
  67
  68                         /* 64 bit bits 63-32 */
  69                         prev->risc.jmp[2] = cpu_to_le32(0);
  70                         dprintk(2,
  71                                 "[%p/%d] buffer_queue - append to active, buf->count=%d\n",
  72                                 buf, buf->vb.i, buf->count);
  73
  74                 } else {
  75                         list_add_tail(&buf->vb.queue, &q->queued);
  76                         buf->vb.state = VIDEOBUF_QUEUED;
  77                         dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf,
  78                                 buf->vb.i);
  79                 }
  80         }
  81
  82         if (list_empty(&q->active)) {
  83                 dprintk(2, "active queue empty!\n");
  84         }
  85 }
  86
  87 static struct videobuf_queue_ops cx25821_video_qops = {
  88         .buf_setup = buffer_setup,
  89         .buf_prepare = buffer_prepare,
  90         .buf_queue = buffer_queue,
  91         .buf_release = buffer_release,
  92 };
  93
  94 static int video_open(struct file *file)
  95 {
  96         int minor = video_devdata(file)->minor;
  97         struct cx25821_dev *h, *dev = NULL;
  98         struct cx25821_fh *fh;
  99         struct list_head *list;
 100         enum v4l2_buf_type type = 0;
 101         u32 pix_format;
 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_CH07]
 108                     && h->video_dev[SRAM_CH07]->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         file->private_data = fh;
 128         fh->dev = dev;
 129         fh->type = type;
 130         fh->width = 720;
 131
 132         if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
 133                 fh->height = 576;
 134         else
 135                 fh->height = 480;
 136
 137         dev->channel_opened = SRAM_CH07;
 138         pix_format =
 139             (dev->pixel_formats[dev->channel_opened] ==
 140              PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
 141         fh->fmt = format_by_fourcc(pix_format);
 142
 143         v4l2_prio_open(&dev->prio, &fh->prio);
 144
 145         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 146                                &dev->pci->dev, &dev->slock,
 147                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 148                                V4L2_FIELD_INTERLACED,
 149                                sizeof(struct cx25821_buffer), fh);
 150
 151         dprintk(1, "post videobuf_queue_init()\n");
 152         unlock_kernel();
 153
 154         return 0;
 155 }
 156
 157 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 158                           loff_t * ppos)
 159 {
 160         struct cx25821_fh *fh = file->private_data;
 161
 162         switch (fh->type) {
 163         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 164                 if (res_locked(fh->dev, RESOURCE_VIDEO7))
 165                         return -EBUSY;
 166
 167                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 168                                          file->f_flags & O_NONBLOCK);
 169
 170         default:
 171                 BUG();
 172                 return 0;
 173         }
 174 }
 175
 176 static unsigned int video_poll(struct file *file,
 177                                struct poll_table_struct *wait)
 178 {
 179         struct cx25821_fh *fh = file->private_data;
 180         struct cx25821_buffer *buf;
 181
 182         if (res_check(fh, RESOURCE_VIDEO7)) {
 183                 /* streaming capture */
 184                 if (list_empty(&fh->vidq.stream))
 185                         return POLLERR;
 186                 buf = list_entry(fh->vidq.stream.next,
 187                                  struct cx25821_buffer, vb.stream);
 188         } else {
 189                 /* read() capture */
 190                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 191                 if (NULL == buf)
 192                         return POLLERR;
 193         }
 194
 195         poll_wait(file, &buf->vb.done, wait);
 196         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) {
 197                 if (buf->vb.state == VIDEOBUF_DONE) {
 198                         struct cx25821_dev *dev = fh->dev;
 199
 200                         if (dev && dev->use_cif_resolution[SRAM_CH07]) {
 201                                 u8 cam_id = *((char *)buf->vb.baddr + 3);
 202                                 memcpy((char *)buf->vb.baddr,
 203                                        (char *)buf->vb.baddr + (fh->width * 2),
 204                                        (fh->width * 2));
 205                                 *((char *)buf->vb.baddr + 3) = cam_id;
 206                         }
 207                 }
 208
 209                 return POLLIN | POLLRDNORM;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static int video_release(struct file *file)
 216 {
 217         struct cx25821_fh *fh = file->private_data;
 218         struct cx25821_dev *dev = fh->dev;
 219
 220         //stop the risc engine and fifo
 221         cx_write(channel7->dma_ctl, 0); /* FIFO and RISC disable */
 222
 223         /* stop video capture */
 224         if (res_check(fh, RESOURCE_VIDEO7)) {
 225                 videobuf_queue_cancel(&fh->vidq);
 226                 res_free(dev, fh, RESOURCE_VIDEO7);
 227         }
 228
 229         if (fh->vidq.read_buf) {
 230                 buffer_release(&fh->vidq, fh->vidq.read_buf);
 231                 kfree(fh->vidq.read_buf);
 232         }
 233
 234         videobuf_mmap_free(&fh->vidq);
 235
 236         v4l2_prio_close(&dev->prio, &fh->prio);
 237         file->private_data = NULL;
 238         kfree(fh);
 239
 240         return 0;
 241 }
 242
 243 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 244 {
 245         struct cx25821_fh *fh = priv;
 246         struct cx25821_dev *dev = fh->dev;
 247
 248         if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 249                 return -EINVAL;
 250         }
 251
 252         if (unlikely(i != fh->type)) {
 253                 return -EINVAL;
 254         }
 255
 256         if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO7)))) {
 257                 return -EBUSY;
 258         }
 259
 260         return videobuf_streamon(get_queue(fh));
 261 }
 262
 263 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 264 {
 265         struct cx25821_fh *fh = priv;
 266         struct cx25821_dev *dev = fh->dev;
 267         int err, res;
 268
 269         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 270                 return -EINVAL;
 271         if (i != fh->type)
 272                 return -EINVAL;
 273
 274         res = get_resource(fh, RESOURCE_VIDEO7);
 275         err = videobuf_streamoff(get_queue(fh));
 276         if (err < 0)
 277                 return err;
 278         res_free(dev, fh, res);
 279         return 0;
 280 }
 281
 282 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 283                                 struct v4l2_format *f)
 284 {
 285         struct cx25821_fh *fh = priv;
 286         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 287         int err;
 288         int pix_format = 0;
 289
 290         if (fh) {
 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                 fh->width = f->fmt.pix.width;
 308         }
 309
 310         if (is_valid_height(f->fmt.pix.height, dev->tvnorm)) {
 311                 fh->height = f->fmt.pix.height;
 312         }
 313
 314         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 315                 pix_format = PIXEL_FRMT_411;
 316         else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
 317                 pix_format = PIXEL_FRMT_422;
 318         else
 319                 return -EINVAL;
 320
 321         cx25821_set_pixel_format(dev, SRAM_CH07, pix_format);
 322
 323         // check if cif resolution
 324         if (fh->width == 320 || fh->width == 352) {
 325                 dev->use_cif_resolution[SRAM_CH07] = 1;
 326         } else {
 327                 dev->use_cif_resolution[SRAM_CH07] = 0;
 328         }
 329         dev->cif_width[SRAM_CH07] = fh->width;
 330         medusa_set_resolution(dev, fh->width, SRAM_CH07);
 331
 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
 336         return 0;
 337 }
 338
 339 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 340 {
 341         int ret_val = 0;
 342         struct cx25821_fh *fh = priv;
 343         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 344
 345         ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 346
 347         p->sequence = dev->vidq[SRAM_CH07].count;
 348
 349         return ret_val;
 350 }
 351 static int vidioc_log_status(struct file *file, void *priv)
 352 {
 353         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 354         char name[32 + 2];
 355
 356         struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH07];
 357         u32 tmp = 0;
 358
 359         snprintf(name, sizeof(name), "%s/2", dev->name);
 360         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 361                dev->name);
 362         cx25821_call_all(dev, core, log_status);
 363
 364         tmp = cx_read(sram_ch->dma_ctl);
 365         printk(KERN_INFO "Video input 7 is %s\n",
 366                (tmp & 0x11) ? "streaming" : "stopped");
 367         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 368                dev->name);
 369         return 0;
 370 }
 371
 372 static int vidioc_s_ctrl(struct file *file, void *priv,
 373                          struct v4l2_control *ctl)
 374 {
 375         struct cx25821_fh *fh = priv;
 376         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 377         int err;
 378
 379         if (fh) {
 380                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 381                 if (0 != err)
 382                         return err;
 383         }
 384
 385         return cx25821_set_control(dev, ctl, SRAM_CH07);
 386 }
 387
 388 // exported stuff
 389 static const struct v4l2_file_operations video_fops = {
 390         .owner = THIS_MODULE,
 391         .open = video_open,
 392         .release = video_release,
 393         .read = video_read,
 394         .poll = video_poll,
 395         .mmap = video_mmap,
 396         .ioctl = video_ioctl2,
 397 };
 398
 399 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 400         .vidioc_querycap = vidioc_querycap,
 401         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 402         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 403         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 404         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 405         .vidioc_reqbufs = vidioc_reqbufs,
 406         .vidioc_querybuf = vidioc_querybuf,
 407         .vidioc_qbuf = vidioc_qbuf,
 408         .vidioc_dqbuf = vidioc_dqbuf,
 409 #ifdef TUNER_FLAG
 410         .vidioc_s_std = vidioc_s_std,
 411         .vidioc_querystd = vidioc_querystd,
 412 #endif
 413         .vidioc_cropcap = vidioc_cropcap,
 414         .vidioc_s_crop = vidioc_s_crop,
 415         .vidioc_g_crop = vidioc_g_crop,
 416         .vidioc_enum_input = vidioc_enum_input,
 417         .vidioc_g_input = vidioc_g_input,
 418         .vidioc_s_input = vidioc_s_input,
 419         .vidioc_g_ctrl = vidioc_g_ctrl,
 420         .vidioc_s_ctrl = vidioc_s_ctrl,
 421         .vidioc_queryctrl = vidioc_queryctrl,
 422         .vidioc_streamon = vidioc_streamon,
 423         .vidioc_streamoff = vidioc_streamoff,
 424         .vidioc_log_status = vidioc_log_status,
 425         .vidioc_g_priority = vidioc_g_priority,
 426         .vidioc_s_priority = vidioc_s_priority,
 427 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 428         .vidiocgmbuf = vidiocgmbuf,
 429 #endif
 430 #ifdef TUNER_FLAG
 431         .vidioc_g_tuner = vidioc_g_tuner,
 432         .vidioc_s_tuner = vidioc_s_tuner,
 433         .vidioc_g_frequency = vidioc_g_frequency,
 434         .vidioc_s_frequency = vidioc_s_frequency,
 435 #endif
 436 #ifdef CONFIG_VIDEO_ADV_DEBUG
 437         .vidioc_g_register = vidioc_g_register,
 438         .vidioc_s_register = vidioc_s_register,
 439 #endif
 440 };
 441
 442 struct video_device cx25821_video_template7 = {
 443         .name = "cx25821-video",
 444         .fops = &video_fops,
 445         .minor = -1,
 446         .ioctl_ops = &video_ioctl_ops,
 447         .tvnorms = CX25821_NORMS,
 448         .current_norm = V4L2_STD_NTSC_M,
 449 };