drivers/staging/cx25821/cx25821-video0.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_CH00];
  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_CH00]);
  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         u32 pix_format;
 103
 104         lock_kernel();
 105         list_for_each(list, &cx25821_devlist) {
 106                 h = list_entry(list, struct cx25821_dev, devlist);
 107
 108                 if (h->video_dev[SRAM_CH00]
 109                     && h->video_dev[SRAM_CH00]->minor == minor) {
 110                         dev = h;
 111                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 112                 }
 113         }
 114
 115         if (NULL == dev) {
 116                 unlock_kernel();
 117                 return -ENODEV;
 118         }
 119
 120         printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);
 121
 122         /* allocate + initialize per filehandle data */
 123         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
 124         if (NULL == fh) {
 125                 unlock_kernel();
 126                 return -ENOMEM;
 127         }
 128
 129         file->private_data = fh;
 130         fh->dev = dev;
 131         fh->type = type;
 132         fh->width = 720;
 133
 134         if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
 135                 fh->height = 576;
 136         else
 137                 fh->height = 480;
 138
 139         dev->channel_opened = SRAM_CH00;
 140         pix_format =
 141             (dev->pixel_formats[dev->channel_opened] ==
 142              PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
 143         fh->fmt = format_by_fourcc(pix_format);
 144
 145         v4l2_prio_open(&dev->prio, &fh->prio);
 146
 147         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 148                                &dev->pci->dev, &dev->slock,
 149                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 150                                V4L2_FIELD_INTERLACED,
 151                                sizeof(struct cx25821_buffer), fh);
 152
 153         dprintk(1, "post videobuf_queue_init()\n");
 154         unlock_kernel();
 155
 156         return 0;
 157 }
 158
 159 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 160                           loff_t * ppos)
 161 {
 162         struct cx25821_fh *fh = file->private_data;
 163
 164         switch (fh->type) {
 165         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 166                 if (res_locked(fh->dev, RESOURCE_VIDEO0))
 167                         return -EBUSY;
 168
 169                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 170                                          file->f_flags & O_NONBLOCK);
 171
 172         default:
 173                 BUG();
 174                 return 0;
 175         }
 176 }
 177
 178 static unsigned int video_poll(struct file *file,
 179                                struct poll_table_struct *wait)
 180 {
 181         struct cx25821_fh *fh = file->private_data;
 182         struct cx25821_buffer *buf;
 183
 184         if (res_check(fh, RESOURCE_VIDEO0)) {
 185                 /* streaming capture */
 186                 if (list_empty(&fh->vidq.stream))
 187                         return POLLERR;
 188                 buf = list_entry(fh->vidq.stream.next,
 189                                  struct cx25821_buffer, vb.stream);
 190         } else {
 191                 /* read() capture */
 192                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 193                 if (NULL == buf)
 194                         return POLLERR;
 195         }
 196
 197         poll_wait(file, &buf->vb.done, wait);
 198         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) {
 199                 if (buf->vb.state == VIDEOBUF_DONE) {
 200                         struct cx25821_dev *dev = fh->dev;
 201
 202                         if (dev && dev->use_cif_resolution[SRAM_CH00]) {
 203                                 u8 cam_id = *((char *)buf->vb.baddr + 3);
 204                                 memcpy((char *)buf->vb.baddr,
 205                                        (char *)buf->vb.baddr + (fh->width * 2),
 206                                        (fh->width * 2));
 207                                 *((char *)buf->vb.baddr + 3) = cam_id;
 208                         }
 209                 }
 210
 211                 return POLLIN | POLLRDNORM;
 212         }
 213
 214         return 0;
 215 }
 216
 217 static int video_release(struct file *file)
 218 {
 219         struct cx25821_fh *fh = file->private_data;
 220         struct cx25821_dev *dev = fh->dev;
 221
 222         //stop the risc engine and fifo
 223         cx_write(channel0->dma_ctl, 0); /* FIFO and RISC disable */
 224
 225         /* stop video capture */
 226         if (res_check(fh, RESOURCE_VIDEO0)) {
 227                 videobuf_queue_cancel(&fh->vidq);
 228                 res_free(dev, fh, RESOURCE_VIDEO0);
 229         }
 230
 231         if (fh->vidq.read_buf) {
 232                 buffer_release(&fh->vidq, fh->vidq.read_buf);
 233                 kfree(fh->vidq.read_buf);
 234         }
 235
 236         videobuf_mmap_free(&fh->vidq);
 237
 238         v4l2_prio_close(&dev->prio, &fh->prio);
 239         file->private_data = NULL;
 240         kfree(fh);
 241
 242         return 0;
 243 }
 244
 245 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 246 {
 247         struct cx25821_fh *fh = priv;
 248         struct cx25821_dev *dev = fh->dev;
 249
 250         if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 251                 return -EINVAL;
 252         }
 253
 254         if (unlikely(i != fh->type)) {
 255                 return -EINVAL;
 256         }
 257
 258         if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO0)))) {
 259                 return -EBUSY;
 260         }
 261
 262         return videobuf_streamon(get_queue(fh));
 263 }
 264
 265 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 266 {
 267         struct cx25821_fh *fh = priv;
 268         struct cx25821_dev *dev = fh->dev;
 269         int err, res;
 270
 271         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 272                 return -EINVAL;
 273         if (i != fh->type)
 274                 return -EINVAL;
 275
 276         res = get_resource(fh, RESOURCE_VIDEO0);
 277         err = videobuf_streamoff(get_queue(fh));
 278         if (err < 0)
 279                 return err;
 280         res_free(dev, fh, res);
 281         return 0;
 282 }
 283
 284 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 285                                 struct v4l2_format *f)
 286 {
 287         struct cx25821_fh *fh = priv;
 288         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 289         int err;
 290         int pix_format = PIXEL_FRMT_422;
 291
 292         if (fh) {
 293                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 294                 if (0 != err)
 295                         return err;
 296         }
 297
 298         dprintk(2, "%s()\n", __func__);
 299         err = vidioc_try_fmt_vid_cap(file, priv, f);
 300
 301         if (0 != err)
 302                 return err;
 303
 304         fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 305         fh->vidq.field = f->fmt.pix.field;
 306
 307         // check if width and height is valid based on set standard
 308         if (is_valid_width(f->fmt.pix.width, dev->tvnorm)) {
 309                 fh->width = f->fmt.pix.width;
 310         }
 311
 312         if (is_valid_height(f->fmt.pix.height, dev->tvnorm)) {
 313                 fh->height = f->fmt.pix.height;
 314         }
 315
 316         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 317                 pix_format = PIXEL_FRMT_411;
 318         else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
 319                 pix_format = PIXEL_FRMT_422;
 320         else
 321                 return -EINVAL;
 322
 323         cx25821_set_pixel_format(dev, SRAM_CH00, pix_format);
 324
 325         // check if cif resolution
 326         if (fh->width == 320 || fh->width == 352) {
 327                 dev->use_cif_resolution[SRAM_CH00] = 1;
 328         } else {
 329                 dev->use_cif_resolution[SRAM_CH00] = 0;
 330         }
 331         dev->cif_width[SRAM_CH00] = fh->width;
 332         medusa_set_resolution(dev, fh->width, SRAM_CH00);
 333
 334         dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
 335                 fh->height, fh->vidq.field);
 336         cx25821_call_all(dev, video, s_fmt, f);
 337
 338         return 0;
 339 }
 340
 341 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 342 {
 343         int ret_val = 0;
 344         struct cx25821_fh *fh = priv;
 345         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 346
 347         ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 348
 349         p->sequence = dev->vidq[SRAM_CH00].count;
 350
 351         return ret_val;
 352 }
 353
 354 static int vidioc_log_status(struct file *file, void *priv)
 355 {
 356         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 357         char name[32 + 2];
 358
 359         struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH00];
 360         u32 tmp = 0;
 361
 362         snprintf(name, sizeof(name), "%s/2", dev->name);
 363         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 364                dev->name);
 365         cx25821_call_all(dev, core, log_status);
 366         tmp = cx_read(sram_ch->dma_ctl);
 367         printk(KERN_INFO "Video input 0 is %s\n",
 368                (tmp & 0x11) ? "streaming" : "stopped");
 369         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 370                dev->name);
 371         return 0;
 372 }
 373
 374 static int vidioc_s_ctrl(struct file *file, void *priv,
 375                          struct v4l2_control *ctl)
 376 {
 377         struct cx25821_fh *fh = priv;
 378         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 379         int err;
 380
 381         if (fh) {
 382                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 383                 if (0 != err)
 384                         return err;
 385         }
 386
 387         return cx25821_set_control(dev, ctl, SRAM_CH00);
 388 }
 389
 390 // exported stuff
 391 static const struct v4l2_file_operations video_fops = {
 392         .owner = THIS_MODULE,
 393         .open = video_open,
 394         .release = video_release,
 395         .read = video_read,
 396         .poll = video_poll,
 397         .mmap = video_mmap,
 398         .ioctl = video_ioctl2,
 399 };
 400
 401 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 402         .vidioc_querycap = vidioc_querycap,
 403         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 404         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 405         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 406         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 407         .vidioc_reqbufs = vidioc_reqbufs,
 408         .vidioc_querybuf = vidioc_querybuf,
 409         .vidioc_qbuf = vidioc_qbuf,
 410         .vidioc_dqbuf = vidioc_dqbuf,
 411 #ifdef TUNER_FLAG
 412         .vidioc_s_std = vidioc_s_std,
 413         .vidioc_querystd = vidioc_querystd,
 414 #endif
 415         .vidioc_cropcap = vidioc_cropcap,
 416         .vidioc_s_crop = vidioc_s_crop,
 417         .vidioc_g_crop = vidioc_g_crop,
 418         .vidioc_enum_input = vidioc_enum_input,
 419         .vidioc_g_input = vidioc_g_input,
 420         .vidioc_s_input = vidioc_s_input,
 421         .vidioc_g_ctrl = vidioc_g_ctrl,
 422         .vidioc_s_ctrl = vidioc_s_ctrl,
 423         .vidioc_queryctrl = vidioc_queryctrl,
 424         .vidioc_streamon = vidioc_streamon,
 425         .vidioc_streamoff = vidioc_streamoff,
 426         .vidioc_log_status = vidioc_log_status,
 427         .vidioc_g_priority = vidioc_g_priority,
 428         .vidioc_s_priority = vidioc_s_priority,
 429 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 430         .vidiocgmbuf = vidiocgmbuf,
 431 #endif
 432 #ifdef TUNER_FLAG
 433         .vidioc_g_tuner = vidioc_g_tuner,
 434         .vidioc_s_tuner = vidioc_s_tuner,
 435         .vidioc_g_frequency = vidioc_g_frequency,
 436         .vidioc_s_frequency = vidioc_s_frequency,
 437 #endif
 438 #ifdef CONFIG_VIDEO_ADV_DEBUG
 439         .vidioc_g_register = vidioc_g_register,
 440         .vidioc_s_register = vidioc_s_register,
 441 #endif
 442 };
 443
 444 struct video_device cx25821_video_template0 = {
 445         .name = "cx25821-video",
 446         .fops = &video_fops,
 447         .minor = -1,
 448         .ioctl_ops = &video_ioctl_ops,
 449         .tvnorms = CX25821_NORMS,
 450         .current_norm = V4L2_STD_NTSC_M,
 451 };