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 = 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_CH02]
 109                     && h->video_dev[SRAM_CH02]->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         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 = SRAM_CH02;
 139         pix_format =
 140             (dev->pixel_formats[dev->channel_opened] ==
 141              PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
 142         fh->fmt = format_by_fourcc(pix_format);
 143
 144         v4l2_prio_open(&dev->prio, &fh->prio);
 145
 146         videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
 147                                &dev->pci->dev, &dev->slock,
 148                                V4L2_BUF_TYPE_VIDEO_CAPTURE,
 149                                V4L2_FIELD_INTERLACED,
 150                                sizeof(struct cx25821_buffer), fh);
 151
 152         dprintk(1, "post videobuf_queue_init()\n");
 153         unlock_kernel();
 154
 155         return 0;
 156 }
 157
 158 static ssize_t video_read(struct file *file, char __user * data, size_t count,
 159                           loff_t * ppos)
 160 {
 161         struct cx25821_fh *fh = file->private_data;
 162
 163         switch (fh->type) {
 164         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 165                 if (res_locked(fh->dev, RESOURCE_VIDEO2))
 166                         return -EBUSY;
 167
 168                 return videobuf_read_one(&fh->vidq, data, count, ppos,
 169                                          file->f_flags & O_NONBLOCK);
 170
 171         default:
 172                 BUG();
 173                 return 0;
 174         }
 175 }
 176
 177 static unsigned int video_poll(struct file *file,
 178                                struct poll_table_struct *wait)
 179 {
 180         struct cx25821_fh *fh = file->private_data;
 181         struct cx25821_buffer *buf;
 182
 183         if (res_check(fh, RESOURCE_VIDEO2)) {
 184                 /* streaming capture */
 185                 if (list_empty(&fh->vidq.stream))
 186                         return POLLERR;
 187                 buf = list_entry(fh->vidq.stream.next,
 188                                  struct cx25821_buffer, vb.stream);
 189         } else {
 190                 /* read() capture */
 191                 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
 192                 if (NULL == buf)
 193                         return POLLERR;
 194         }
 195
 196         poll_wait(file, &buf->vb.done, wait);
 197         if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) {
 198                 if (buf->vb.state == VIDEOBUF_DONE) {
 199                         struct cx25821_dev *dev = fh->dev;
 200
 201                         if (dev && dev->use_cif_resolution[SRAM_CH02]) {
 202                                 u8 cam_id = *((char *)buf->vb.baddr + 3);
 203                                 memcpy((char *)buf->vb.baddr,
 204                                        (char *)buf->vb.baddr + (fh->width * 2),
 205                                        (fh->width * 2));
 206                                 *((char *)buf->vb.baddr + 3) = cam_id;
 207                         }
 208                 }
 209
 210                 return POLLIN | POLLRDNORM;
 211         }
 212
 213         return 0;
 214 }
 215
 216 static int video_release(struct file *file)
 217 {
 218         struct cx25821_fh *fh = file->private_data;
 219         struct cx25821_dev *dev = fh->dev;
 220
 221         //stop the risc engine and fifo
 222         cx_write(channel2->dma_ctl, 0); /* FIFO and RISC disable */
 223
 224         /* stop video capture */
 225         if (res_check(fh, RESOURCE_VIDEO2)) {
 226                 videobuf_queue_cancel(&fh->vidq);
 227                 res_free(dev, fh, RESOURCE_VIDEO2);
 228         }
 229
 230         if (fh->vidq.read_buf) {
 231                 buffer_release(&fh->vidq, fh->vidq.read_buf);
 232                 kfree(fh->vidq.read_buf);
 233         }
 234
 235         videobuf_mmap_free(&fh->vidq);
 236
 237         v4l2_prio_close(&dev->prio, &fh->prio);
 238         file->private_data = NULL;
 239         kfree(fh);
 240
 241         return 0;
 242 }
 243
 244 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 245 {
 246         struct cx25821_fh *fh = priv;
 247         struct cx25821_dev *dev = fh->dev;
 248
 249         if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 250                 return -EINVAL;
 251         }
 252
 253         if (unlikely(i != fh->type)) {
 254                 return -EINVAL;
 255         }
 256
 257         if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO2)))) {
 258                 return -EBUSY;
 259         }
 260
 261         return videobuf_streamon(get_queue(fh));
 262 }
 263
 264 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 265 {
 266         struct cx25821_fh *fh = priv;
 267         struct cx25821_dev *dev = fh->dev;
 268         int err, res;
 269
 270         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 271                 return -EINVAL;
 272         if (i != fh->type)
 273                 return -EINVAL;
 274
 275         res = get_resource(fh, RESOURCE_VIDEO2);
 276         err = videobuf_streamoff(get_queue(fh));
 277         if (err < 0)
 278                 return err;
 279         res_free(dev, fh, res);
 280         return 0;
 281 }
 282
 283 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 284                                 struct v4l2_format *f)
 285 {
 286         struct cx25821_fh *fh = priv;
 287         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 288         int err;
 289         int pix_format = 0;
 290
 291         if (fh) {
 292                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 293                 if (0 != err)
 294                         return err;
 295         }
 296
 297         dprintk(2, "%s()\n", __func__);
 298         err = vidioc_try_fmt_vid_cap(file, priv, f);
 299
 300         if (0 != err)
 301                 return err;
 302
 303         fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 304         fh->vidq.field = f->fmt.pix.field;
 305
 306         // check if width and height is valid based on set standard
 307         if (is_valid_width(f->fmt.pix.width, dev->tvnorm)) {
 308                 fh->width = f->fmt.pix.width;
 309         }
 310
 311         if (is_valid_height(f->fmt.pix.height, dev->tvnorm)) {
 312                 fh->height = f->fmt.pix.height;
 313         }
 314
 315         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 316                 pix_format = PIXEL_FRMT_411;
 317         else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
 318                 pix_format = PIXEL_FRMT_422;
 319         else
 320                 return -EINVAL;
 321
 322         cx25821_set_pixel_format(dev, SRAM_CH02, pix_format);
 323
 324         // check if cif resolution
 325         if (fh->width == 320 || fh->width == 352) {
 326                 dev->use_cif_resolution[SRAM_CH02] = 1;
 327         } else {
 328                 dev->use_cif_resolution[SRAM_CH02] = 0;
 329         }
 330         dev->cif_width[SRAM_CH02] = fh->width;
 331         medusa_set_resolution(dev, fh->width, SRAM_CH02);
 332
 333         dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
 334                 fh->height, fh->vidq.field);
 335         cx25821_call_all(dev, video, s_fmt, f);
 336
 337         return 0;
 338 }
 339
 340 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 341 {
 342         int ret_val = 0;
 343         struct cx25821_fh *fh = priv;
 344         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 345
 346         ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
 347
 348         p->sequence = dev->vidq[SRAM_CH02].count;
 349
 350         return ret_val;
 351 }
 352
 353 static int vidioc_log_status(struct file *file, void *priv)
 354 {
 355         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 356         char name[32 + 2];
 357
 358         struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH02];
 359         u32 tmp = 0;
 360
 361         snprintf(name, sizeof(name), "%s/2", dev->name);
 362         printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
 363                dev->name);
 364
 365         cx25821_call_all(dev, core, log_status);
 366
 367         tmp = cx_read(sram_ch->dma_ctl);
 368         printk(KERN_INFO "Video input 2 is %s\n",
 369                (tmp & 0x11) ? "streaming" : "stopped");
 370         printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
 371                dev->name);
 372         return 0;
 373 }
 374
 375 static int vidioc_s_ctrl(struct file *file, void *priv,
 376                          struct v4l2_control *ctl)
 377 {
 378         struct cx25821_fh *fh = priv;
 379         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
 380         int err;
 381
 382         if (fh) {
 383                 err = v4l2_prio_check(&dev->prio, &fh->prio);
 384                 if (0 != err)
 385                         return err;
 386         }
 387
 388         return cx25821_set_control(dev, ctl, SRAM_CH02);
 389 }
 390
 391 // exported stuff
 392 static const struct v4l2_file_operations video_fops = {
 393         .owner = THIS_MODULE,
 394         .open = video_open,
 395         .release = video_release,
 396         .read = video_read,
 397         .poll = video_poll,
 398         .mmap = video_mmap,
 399         .ioctl = video_ioctl2,
 400 };
 401
 402 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 403         .vidioc_querycap = vidioc_querycap,
 404         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 405         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 406         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 407         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 408         .vidioc_reqbufs = vidioc_reqbufs,
 409         .vidioc_querybuf = vidioc_querybuf,
 410         .vidioc_qbuf = vidioc_qbuf,
 411         .vidioc_dqbuf = vidioc_dqbuf,
 412 #ifdef TUNER_FLAG
 413         .vidioc_s_std = vidioc_s_std,
 414         .vidioc_querystd = vidioc_querystd,
 415 #endif
 416         .vidioc_cropcap = vidioc_cropcap,
 417         .vidioc_s_crop = vidioc_s_crop,
 418         .vidioc_g_crop = vidioc_g_crop,
 419         .vidioc_enum_input = vidioc_enum_input,
 420         .vidioc_g_input = vidioc_g_input,
 421         .vidioc_s_input = vidioc_s_input,
 422         .vidioc_g_ctrl = vidioc_g_ctrl,
 423         .vidioc_s_ctrl = vidioc_s_ctrl,
 424         .vidioc_queryctrl = vidioc_queryctrl,
 425         .vidioc_streamon = vidioc_streamon,
 426         .vidioc_streamoff = vidioc_streamoff,
 427         .vidioc_log_status = vidioc_log_status,
 428         .vidioc_g_priority = vidioc_g_priority,
 429         .vidioc_s_priority = vidioc_s_priority,
 430 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 431         .vidiocgmbuf = vidiocgmbuf,
 432 #endif
 433 #ifdef TUNER_FLAG
 434         .vidioc_g_tuner = vidioc_g_tuner,
 435         .vidioc_s_tuner = vidioc_s_tuner,
 436         .vidioc_g_frequency = vidioc_g_frequency,
 437         .vidioc_s_frequency = vidioc_s_frequency,
 438 #endif
 439 #ifdef CONFIG_VIDEO_ADV_DEBUG
 440         .vidioc_g_register = vidioc_g_register,
 441         .vidioc_s_register = vidioc_s_register,
 442 #endif
 443 };
 444
 445 struct video_device cx25821_video_template2 = {
 446         .name = "cx25821-video",
 447         .fops = &video_fops,
 448         .minor = -1,
 449         .ioctl_ops = &video_ioctl_ops,
 450         .tvnorms = CX25821_NORMS,
 451         .current_norm = V4L2_STD_NTSC_M,
 452 };