drivers/media/pci/sta2x11/sta2x11_vip.c

   1 /*
   2  * This is the driver for the STA2x11 Video Input Port.
   3  *
   4  * Copyright (C) 2010       WindRiver Systems, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in
  20  * the file called "COPYING".
  21  *
  22  * Author: Andreas Kies <andreas.kies@windriver.com>
  23  *              Vlad Lungu <vlad.lungu@windriver.com>
  24  *
  25  */
  26
  27 #include <linux/types.h>
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/vmalloc.h>
  32
  33 #include <linux/videodev2.h>
  34
  35 #include <linux/kmod.h>
  36
  37 #include <linux/pci.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/mutex.h>
  40 #include <linux/io.h>
  41 #include <linux/gpio.h>
  42 #include <linux/i2c.h>
  43 #include <linux/delay.h>
  44 #include <media/v4l2-common.h>
  45 #include <media/v4l2-device.h>
  46 #include <media/v4l2-ioctl.h>
  47 #include <media/videobuf-dma-contig.h>
  48
  49 #include "sta2x11_vip.h"
  50
  51 #define DRV_NAME "sta2x11_vip"
  52 #define DRV_VERSION "1.3"
  53
  54 #ifndef PCI_DEVICE_ID_STMICRO_VIP
  55 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D
  56 #endif
  57
  58 #define MAX_FRAMES 4
  59
  60 /*Register offsets*/
  61 #define DVP_CTL         0x00
  62 #define DVP_TFO         0x04
  63 #define DVP_TFS         0x08
  64 #define DVP_BFO         0x0C
  65 #define DVP_BFS         0x10
  66 #define DVP_VTP         0x14
  67 #define DVP_VBP         0x18
  68 #define DVP_VMP         0x1C
  69 #define DVP_ITM         0x98
  70 #define DVP_ITS         0x9C
  71 #define DVP_STA         0xA0
  72 #define DVP_HLFLN       0xA8
  73 #define DVP_RGB         0xC0
  74 #define DVP_PKZ         0xF0
  75
  76 /*Register fields*/
  77 #define DVP_CTL_ENA     0x00000001
  78 #define DVP_CTL_RST     0x80000000
  79 #define DVP_CTL_DIS     (~0x00040001)
  80
  81 #define DVP_IT_VSB      0x00000008
  82 #define DVP_IT_VST      0x00000010
  83 #define DVP_IT_FIFO     0x00000020
  84
  85 #define DVP_HLFLN_SD    0x00000001
  86
  87 #define REG_WRITE(vip, reg, value) iowrite32((value), (vip->iomem)+(reg))
  88 #define REG_READ(vip, reg) ioread32((vip->iomem)+(reg))
  89
  90 #define SAVE_COUNT 8
  91 #define AUX_COUNT 3
  92 #define IRQ_COUNT 1
  93
  94 /**
  95  * struct sta2x11_vip - All internal data for one instance of device
  96  * @v4l2_dev: device registered in v4l layer
  97  * @video_dev: properties of our device
  98  * @pdev: PCI device
  99  * @adapter: contains I2C adapter information
 100  * @register_save_area: All relevant register are saved here during suspend
 101  * @decoder: contains information about video DAC
 102  * @format: pixel format, fixed UYVY
 103  * @std: video standard (e.g. PAL/NTSC)
 104  * @input: input line for video signal ( 0 or 1 )
 105  * @users: Number of open of device ( max. 1 )
 106  * @disabled: Device is in power down state
 107  * @mutex: ensures exclusive opening of device
 108  * @slock: for excluse acces of registers
 109  * @vb_vidq: queue maintained by videobuf layer
 110  * @capture: linked list of capture buffer
 111  * @active: struct videobuf_buffer currently beingg filled
 112  * @started: device is ready to capture frame
 113  * @closing: device will be shut down
 114  * @tcount: Number of top frames
 115  * @bcount: Number of bottom frames
 116  * @overflow: Number of FIFO overflows
 117  * @mem_spare: small buffer of unused frame
 118  * @dma_spare: dma addres of mem_spare
 119  * @iomem: hardware base address
 120  * @config: I2C and gpio config from platform
 121  *
 122  * All non-local data is accessed via this structure.
 123  */
 124
 125 struct sta2x11_vip {
 126         struct v4l2_device v4l2_dev;
 127         struct video_device *video_dev;
 128         struct pci_dev *pdev;
 129         struct i2c_adapter *adapter;
 130         unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT];
 131         struct v4l2_subdev *decoder;
 132         struct v4l2_pix_format format;
 133         v4l2_std_id std;
 134         unsigned int input;
 135         int users;
 136         int disabled;
 137         struct mutex mutex;     /* exclusive access during open */
 138         spinlock_t slock;       /* spin lock for hardware and queue access */
 139         struct videobuf_queue vb_vidq;
 140         struct list_head capture;
 141         struct videobuf_buffer *active;
 142         int started, closing, tcount, bcount;
 143         int overflow;
 144         void *mem_spare;
 145         dma_addr_t dma_spare;
 146         void *iomem;
 147         struct vip_config *config;
 148 };
 149
 150 static const unsigned int registers_to_save[AUX_COUNT] = {
 151         DVP_HLFLN, DVP_RGB, DVP_PKZ
 152 };
 153
 154 static struct v4l2_pix_format formats_50[] = {
 155         {                       /*PAL interlaced */
 156          .width = 720,
 157          .height = 576,
 158          .pixelformat = V4L2_PIX_FMT_UYVY,
 159          .field = V4L2_FIELD_INTERLACED,
 160          .bytesperline = 720 * 2,
 161          .sizeimage = 720 * 2 * 576,
 162          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 163         {                       /*PAL top */
 164          .width = 720,
 165          .height = 288,
 166          .pixelformat = V4L2_PIX_FMT_UYVY,
 167          .field = V4L2_FIELD_TOP,
 168          .bytesperline = 720 * 2,
 169          .sizeimage = 720 * 2 * 288,
 170          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 171         {                       /*PAL bottom */
 172          .width = 720,
 173          .height = 288,
 174          .pixelformat = V4L2_PIX_FMT_UYVY,
 175          .field = V4L2_FIELD_BOTTOM,
 176          .bytesperline = 720 * 2,
 177          .sizeimage = 720 * 2 * 288,
 178          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 179
 180 };
 181
 182 static struct v4l2_pix_format formats_60[] = {
 183         {                       /*NTSC interlaced */
 184          .width = 720,
 185          .height = 480,
 186          .pixelformat = V4L2_PIX_FMT_UYVY,
 187          .field = V4L2_FIELD_INTERLACED,
 188          .bytesperline = 720 * 2,
 189          .sizeimage = 720 * 2 * 480,
 190          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 191         {                       /*NTSC top */
 192          .width = 720,
 193          .height = 240,
 194          .pixelformat = V4L2_PIX_FMT_UYVY,
 195          .field = V4L2_FIELD_TOP,
 196          .bytesperline = 720 * 2,
 197          .sizeimage = 720 * 2 * 240,
 198          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 199         {                       /*NTSC bottom */
 200          .width = 720,
 201          .height = 240,
 202          .pixelformat = V4L2_PIX_FMT_UYVY,
 203          .field = V4L2_FIELD_BOTTOM,
 204          .bytesperline = 720 * 2,
 205          .sizeimage = 720 * 2 * 240,
 206          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 207 };
 208
 209 /**
 210  * buf_setup - Get size and number of video buffer
 211  * @vq: queue in videobuf
 212  * @count: Number of buffers (1..MAX_FRAMES).
 213  *              0 use default value.
 214  * @size:  size of buffer in bytes
 215  *
 216  * returns size and number of buffers
 217  * a preset value of 0 returns the default number.
 218  * return value: 0, always succesfull.
 219  */
 220 static int buf_setup(struct videobuf_queue *vq, unsigned int *count,
 221                      unsigned int *size)
 222 {
 223         struct sta2x11_vip *vip = vq->priv_data;
 224
 225         *size = vip->format.width * vip->format.height * 2;
 226         if (0 == *count || MAX_FRAMES < *count)
 227                 *count = MAX_FRAMES;
 228         return 0;
 229 };
 230
 231 /**
 232  * buf_prepare - prepare buffer for usage
 233  * @vq: queue in videobuf layer
 234  * @vb: buffer to be prepared
 235  * @field: type of video data (interlaced/non-interlaced)
 236  *
 237  * Allocate or realloc buffer
 238  * return value: 0, successful.
 239  *
 240  * -EINVAL, supplied buffer is too small.
 241  *
 242  *  other, buffer could not be locked.
 243  */
 244 static int buf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 245                        enum v4l2_field field)
 246 {
 247         struct sta2x11_vip *vip = vq->priv_data;
 248         int ret;
 249
 250         vb->size = vip->format.width * vip->format.height * 2;
 251         if ((0 != vb->baddr) && (vb->bsize < vb->size))
 252                 return -EINVAL;
 253         vb->width = vip->format.width;
 254         vb->height = vip->format.height;
 255         vb->field = field;
 256
 257         if (VIDEOBUF_NEEDS_INIT == vb->state) {
 258                 ret = videobuf_iolock(vq, vb, NULL);
 259                 if (ret)
 260                         goto fail;
 261         }
 262         vb->state = VIDEOBUF_PREPARED;
 263         return 0;
 264 fail:
 265         videobuf_dma_contig_free(vq, vb);
 266         vb->state = VIDEOBUF_NEEDS_INIT;
 267         return ret;
 268 }
 269
 270 /**
 271  * buf_queu - queue buffer for filling
 272  * @vq: queue in videobuf layer
 273  * @vb: buffer to be queued
 274  *
 275  * if capturing is already running, the buffer will be queued. Otherwise
 276  * capture is started and the buffer is used directly.
 277  */
 278 static void buf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 279 {
 280         struct sta2x11_vip *vip = vq->priv_data;
 281         u32 dma;
 282
 283         vb->state = VIDEOBUF_QUEUED;
 284
 285         if (vip->active) {
 286                 list_add_tail(&vb->queue, &vip->capture);
 287                 return;
 288         }
 289
 290         vip->started = 1;
 291         vip->tcount = 0;
 292         vip->bcount = 0;
 293         vip->active = vb;
 294         vb->state = VIDEOBUF_ACTIVE;
 295
 296         dma = videobuf_to_dma_contig(vb);
 297
 298         REG_WRITE(vip, DVP_TFO, (0 << 16) | (0));
 299         /* despite of interlace mode, upper and lower frames start at zero */
 300         REG_WRITE(vip, DVP_BFO, (0 << 16) | (0));
 301
 302         switch (vip->format.field) {
 303         case V4L2_FIELD_INTERLACED:
 304                 REG_WRITE(vip, DVP_TFS,
 305                           ((vip->format.height / 2 - 1) << 16) |
 306                           (2 * vip->format.width - 1));
 307                 REG_WRITE(vip, DVP_BFS, ((vip->format.height / 2 - 1) << 16) |
 308                           (2 * vip->format.width - 1));
 309                 REG_WRITE(vip, DVP_VTP, dma);
 310                 REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2);
 311                 REG_WRITE(vip, DVP_VMP, 4 * vip->format.width);
 312                 break;
 313         case V4L2_FIELD_TOP:
 314                 REG_WRITE(vip, DVP_TFS,
 315                           ((vip->format.height - 1) << 16) |
 316                           (2 * vip->format.width - 1));
 317                 REG_WRITE(vip, DVP_BFS, ((0) << 16) |
 318                           (2 * vip->format.width - 1));
 319                 REG_WRITE(vip, DVP_VTP, dma);
 320                 REG_WRITE(vip, DVP_VBP, dma);
 321                 REG_WRITE(vip, DVP_VMP, 2 * vip->format.width);
 322                 break;
 323         case V4L2_FIELD_BOTTOM:
 324                 REG_WRITE(vip, DVP_TFS, ((0) << 16) |
 325                           (2 * vip->format.width - 1));
 326                 REG_WRITE(vip, DVP_BFS,
 327                           ((vip->format.height) << 16) |
 328                           (2 * vip->format.width - 1));
 329                 REG_WRITE(vip, DVP_VTP, dma);
 330                 REG_WRITE(vip, DVP_VBP, dma);
 331                 REG_WRITE(vip, DVP_VMP, 2 * vip->format.width);
 332                 break;
 333
 334         default:
 335                 pr_warning("VIP: unknown field format\n");
 336                 return;
 337         }
 338
 339         REG_WRITE(vip, DVP_CTL, DVP_CTL_ENA);
 340 }
 341
 342 /**
 343  * buff_release - release buffer
 344  * @vq: queue in videobuf layer
 345  * @vb: buffer to be released
 346  *
 347  * release buffer in videobuf layer
 348  */
 349 static void buf_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 350 {
 351
 352         videobuf_dma_contig_free(vq, vb);
 353         vb->state = VIDEOBUF_NEEDS_INIT;
 354 }
 355
 356 static struct videobuf_queue_ops vip_qops = {
 357         .buf_setup = buf_setup,
 358         .buf_prepare = buf_prepare,
 359         .buf_queue = buf_queue,
 360         .buf_release = buf_release,
 361 };
 362
 363 /**
 364  * vip_open - open video device
 365  * @file: descriptor of device
 366  *
 367  * open device, make sure it is only opened once.
 368  * return value: 0, no error.
 369  *
 370  * -EBUSY, device is already opened
 371  *
 372  * -ENOMEM, no memory for auxiliary DMA buffer
 373  */
 374 static int vip_open(struct file *file)
 375 {
 376         struct video_device *dev = video_devdata(file);
 377         struct sta2x11_vip *vip = video_get_drvdata(dev);
 378
 379         mutex_lock(&vip->mutex);
 380         vip->users++;
 381
 382         if (vip->users > 1) {
 383                 vip->users--;
 384                 mutex_unlock(&vip->mutex);
 385                 return -EBUSY;
 386         }
 387
 388         file->private_data = dev;
 389         vip->overflow = 0;
 390         vip->started = 0;
 391         vip->closing = 0;
 392         vip->active = NULL;
 393
 394         INIT_LIST_HEAD(&vip->capture);
 395         vip->mem_spare = dma_alloc_coherent(&vip->pdev->dev, 64,
 396                                             &vip->dma_spare, GFP_KERNEL);
 397         if (!vip->mem_spare) {
 398                 vip->users--;
 399                 mutex_unlock(&vip->mutex);
 400                 return -ENOMEM;
 401         }
 402
 403         mutex_unlock(&vip->mutex);
 404         videobuf_queue_dma_contig_init_cached(&vip->vb_vidq,
 405                                               &vip_qops,
 406                                               &vip->pdev->dev,
 407                                               &vip->slock,
 408                                               V4L2_BUF_TYPE_VIDEO_CAPTURE,
 409                                               V4L2_FIELD_INTERLACED,
 410                                               sizeof(struct videobuf_buffer),
 411                                               vip, NULL);
 412         REG_READ(vip, DVP_ITS);
 413         REG_WRITE(vip, DVP_HLFLN, DVP_HLFLN_SD);
 414         REG_WRITE(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST);
 415         REG_WRITE(vip, DVP_CTL, DVP_CTL_RST);
 416         REG_WRITE(vip, DVP_CTL, 0);
 417         REG_READ(vip, DVP_ITS);
 418         return 0;
 419 }
 420
 421 /**
 422  * vip_close - close video device
 423  * @file: descriptor of device
 424  *
 425  * close video device, wait until all pending operations are finished
 426  * ( maximum FRAME_MAX buffers pending )
 427  * Turn off interrupts.
 428  *
 429  * return value: 0, always succesful.
 430  */
 431 static int vip_close(struct file *file)
 432 {
 433         struct video_device *dev = video_devdata(file);
 434         struct sta2x11_vip *vip = video_get_drvdata(dev);
 435
 436         vip->closing = 1;
 437         if (vip->active)
 438                 videobuf_waiton(&vip->vb_vidq, vip->active, 0, 0);
 439         spin_lock_irq(&vip->slock);
 440
 441         REG_WRITE(vip, DVP_ITM, 0);
 442         REG_WRITE(vip, DVP_CTL, DVP_CTL_RST);
 443         REG_WRITE(vip, DVP_CTL, 0);
 444         REG_READ(vip, DVP_ITS);
 445
 446         vip->started = 0;
 447         vip->active = NULL;
 448
 449         spin_unlock_irq(&vip->slock);
 450
 451         videobuf_stop(&vip->vb_vidq);
 452         videobuf_mmap_free(&vip->vb_vidq);
 453
 454         dma_free_coherent(&vip->pdev->dev, 64, vip->mem_spare, vip->dma_spare);
 455         file->private_data = NULL;
 456         mutex_lock(&vip->mutex);
 457         vip->users--;
 458         mutex_unlock(&vip->mutex);
 459         return 0;
 460 }
 461
 462 /**
 463  * vip_read - read from video input
 464  * @file: descriptor of device
 465  * @data: user buffer
 466  * @count: number of bytes to be read
 467  * @ppos: position within stream
 468  *
 469  * read video data from video device.
 470  * handling is done in generic videobuf layer
 471  * return value: provided by videobuf layer
 472  */
 473 static ssize_t vip_read(struct file *file, char __user *data,
 474                         size_t count, loff_t *ppos)
 475 {
 476         struct video_device *dev = file->private_data;
 477         struct sta2x11_vip *vip = video_get_drvdata(dev);
 478
 479         return videobuf_read_stream(&vip->vb_vidq, data, count, ppos, 0,
 480                                     file->f_flags & O_NONBLOCK);
 481 }
 482
 483 /**
 484  * vip_mmap - map user buffer
 485  * @file: descriptor of device
 486  * @vma: user buffer
 487  *
 488  * map user space buffer into kernel mode, including DMA address.
 489  * handling is done in generic videobuf layer.
 490  * return value: provided by videobuf layer
 491  */
 492 static int vip_mmap(struct file *file, struct vm_area_struct *vma)
 493 {
 494         struct video_device *dev = file->private_data;
 495         struct sta2x11_vip *vip = video_get_drvdata(dev);
 496
 497         return videobuf_mmap_mapper(&vip->vb_vidq, vma);
 498 }
 499
 500 /**
 501  * vip_poll - poll for event
 502  * @file: descriptor of device
 503  * @wait: contains events to be waited for
 504  *
 505  * wait for event related to video device.
 506  * handling is done in generic videobuf layer.
 507  * return value: provided by videobuf layer
 508  */
 509 static unsigned int vip_poll(struct file *file, struct poll_table_struct *wait)
 510 {
 511         struct video_device *dev = file->private_data;
 512         struct sta2x11_vip *vip = video_get_drvdata(dev);
 513
 514         return videobuf_poll_stream(file, &vip->vb_vidq, wait);
 515 }
 516
 517 /**
 518  * vidioc_querycap - return capabilities of device
 519  * @file: descriptor of device (not used)
 520  * @priv: points to current videodevice
 521  * @cap: contains return values
 522  *
 523  * the capabilities of the device are returned
 524  *
 525  * return value: 0, no error.
 526  */
 527 static int vidioc_querycap(struct file *file, void *priv,
 528                            struct v4l2_capability *cap)
 529 {
 530         struct video_device *dev = priv;
 531         struct sta2x11_vip *vip = video_get_drvdata(dev);
 532
 533         memset(cap, 0, sizeof(struct v4l2_capability));
 534         strcpy(cap->driver, DRV_NAME);
 535         strcpy(cap->card, DRV_NAME);
 536         cap->version = 0;
 537         snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
 538                  pci_name(vip->pdev));
 539         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 540             V4L2_CAP_STREAMING;
 541
 542         return 0;
 543 }
 544
 545 /**
 546  * vidioc_s_std - set video standard
 547  * @file: descriptor of device (not used)
 548  * @priv: points to current videodevice
 549  * @std: contains standard to be set
 550  *
 551  * the video standard is set
 552  *
 553  * return value: 0, no error.
 554  *
 555  * -EIO, no input signal detected
 556  *
 557  * other, returned from video DAC.
 558  */
 559 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *std)
 560 {
 561         struct video_device *dev = priv;
 562         struct sta2x11_vip *vip = video_get_drvdata(dev);
 563         v4l2_std_id oldstd = vip->std, newstd;
 564         int status;
 565
 566         if (V4L2_STD_ALL == *std) {
 567                 v4l2_subdev_call(vip->decoder, core, s_std, *std);
 568                 ssleep(2);
 569                 v4l2_subdev_call(vip->decoder, video, querystd, &newstd);
 570                 v4l2_subdev_call(vip->decoder, video, g_input_status, &status);
 571                 if (status & V4L2_IN_ST_NO_SIGNAL)
 572                         return -EIO;
 573                 *std = vip->std = newstd;
 574                 if (oldstd != *std) {
 575                         if (V4L2_STD_525_60 & (*std))
 576                                 vip->format = formats_60[0];
 577                         else
 578                                 vip->format = formats_50[0];
 579                 }
 580                 return 0;
 581         }
 582
 583         if (oldstd != *std) {
 584                 if (V4L2_STD_525_60 & (*std))
 585                         vip->format = formats_60[0];
 586                 else
 587                         vip->format = formats_50[0];
 588         }
 589
 590         return v4l2_subdev_call(vip->decoder, core, s_std, *std);
 591 }
 592
 593 /**
 594  * vidioc_g_std - get video standard
 595  * @file: descriptor of device (not used)
 596  * @priv: points to current videodevice
 597  * @std: contains return values
 598  *
 599  * the current video standard is returned
 600  *
 601  * return value: 0, no error.
 602  */
 603 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
 604 {
 605         struct video_device *dev = priv;
 606         struct sta2x11_vip *vip = video_get_drvdata(dev);
 607
 608         *std = vip->std;
 609         return 0;
 610 }
 611
 612 /**
 613  * vidioc_querystd - get possible video standards
 614  * @file: descriptor of device (not used)
 615  * @priv: points to current videodevice
 616  * @std: contains return values
 617  *
 618  * all possible video standards are returned
 619  *
 620  * return value: delivered by video DAC routine.
 621  */
 622 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std)
 623 {
 624         struct video_device *dev = priv;
 625         struct sta2x11_vip *vip = video_get_drvdata(dev);
 626
 627         return v4l2_subdev_call(vip->decoder, video, querystd, std);
 628
 629 }
 630
 631 /**
 632  * vidioc_queryctl - get possible control settings
 633  * @file: descriptor of device (not used)
 634  * @priv: points to current videodevice
 635  * @ctrl: contains return values
 636  *
 637  * return possible values for a control
 638  * return value: delivered by video DAC routine.
 639  */
 640 static int vidioc_queryctrl(struct file *file, void *priv,
 641                             struct v4l2_queryctrl *ctrl)
 642 {
 643         struct video_device *dev = priv;
 644         struct sta2x11_vip *vip = video_get_drvdata(dev);
 645
 646         return v4l2_subdev_call(vip->decoder, core, queryctrl, ctrl);
 647 }
 648
 649 /**
 650  * vidioc_g_ctl - get control value
 651  * @file: descriptor of device (not used)
 652  * @priv: points to current videodevice
 653  * @ctrl: contains return values
 654  *
 655  * return setting for a control value
 656  * return value: delivered by video DAC routine.
 657  */
 658 static int vidioc_g_ctrl(struct file *file, void *priv,
 659                          struct v4l2_control *ctrl)
 660 {
 661         struct video_device *dev = priv;
 662         struct sta2x11_vip *vip = video_get_drvdata(dev);
 663
 664         return v4l2_subdev_call(vip->decoder, core, g_ctrl, ctrl);
 665 }
 666
 667 /**
 668  * vidioc_s_ctl - set control value
 669  * @file: descriptor of device (not used)
 670  * @priv: points to current videodevice
 671  * @ctrl: contains value to be set
 672  *
 673  * set value for a specific control
 674  * return value: delivered by video DAC routine.
 675  */
 676 static int vidioc_s_ctrl(struct file *file, void *priv,
 677                          struct v4l2_control *ctrl)
 678 {
 679         struct video_device *dev = priv;
 680         struct sta2x11_vip *vip = video_get_drvdata(dev);
 681
 682         return v4l2_subdev_call(vip->decoder, core, s_ctrl, ctrl);
 683 }
 684
 685 /**
 686  * vidioc_enum_input - return name of input line
 687  * @file: descriptor of device (not used)
 688  * @priv: points to current videodevice
 689  * @inp: contains return values
 690  *
 691  * the user friendly name of the input line is returned
 692  *
 693  * return value: 0, no error.
 694  *
 695  * -EINVAL, input line number out of range
 696  */
 697 static int vidioc_enum_input(struct file *file, void *priv,
 698                              struct v4l2_input *inp)
 699 {
 700         if (inp->index > 1)
 701                 return -EINVAL;
 702
 703         inp->type = V4L2_INPUT_TYPE_CAMERA;
 704         inp->std = V4L2_STD_ALL;
 705         sprintf(inp->name, "Camera %u", inp->index);
 706
 707         return 0;
 708 }
 709
 710 /**
 711  * vidioc_s_input - set input line
 712  * @file: descriptor of device ( not used)
 713  * @priv: points to current videodevice
 714  * @i: new input line number
 715  *
 716  * the current active input line is set
 717  *
 718  * return value: 0, no error.
 719  *
 720  * -EINVAL, line number out of range
 721  */
 722 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 723 {
 724         struct video_device *dev = priv;
 725         struct sta2x11_vip *vip = video_get_drvdata(dev);
 726         int ret;
 727
 728         if (i > 1)
 729                 return -EINVAL;
 730         ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0);
 731
 732         if (!ret)
 733                 vip->input = i;
 734
 735         return 0;
 736 }
 737
 738 /**
 739  * vidioc_g_input - return input line
 740  * @file: descriptor of device ( not used)
 741  * @priv: points to current videodevice
 742  * @i: returned input line number
 743  *
 744  * the current active input line is returned
 745  *
 746  * return value: always 0.
 747  */
 748 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 749 {
 750         struct video_device *dev = priv;
 751         struct sta2x11_vip *vip = video_get_drvdata(dev);
 752
 753         *i = vip->input;
 754         return 0;
 755 }
 756
 757 /**
 758  * vidioc_enum_fmt_vid_cap - return video capture format
 759  * @file: descriptor of device ( not used)
 760  * @priv: points to current videodevice
 761  * @f: returned format information
 762  *
 763  * returns name and format of video capture
 764  * Only UYVY is supported by hardware.
 765  *
 766  * return value: always 0.
 767  */
 768 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 769                                    struct v4l2_fmtdesc *f)
 770 {
 771
 772         if (f->index != 0)
 773                 return -EINVAL;
 774
 775         strcpy(f->description, "4:2:2, packed, UYVY");
 776         f->pixelformat = V4L2_PIX_FMT_UYVY;
 777         f->flags = 0;
 778         return 0;
 779 }
 780
 781 /**
 782  * vidioc_try_fmt_vid_cap - set video capture format
 783  * @file: descriptor of device ( not used)
 784  * @priv: points to current videodevice
 785  * @f: new format
 786  *
 787  * new video format is set which includes width and
 788  * field type. width is fixed to 720, no scaling.
 789  * Only UYVY is supported by this hardware.
 790  * the minimum height is 200, the maximum is 576 (PAL)
 791  *
 792  * return value: 0, no error
 793  *
 794  * -EINVAL, pixel or field format not supported
 795  *
 796  */
 797 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 798                                   struct v4l2_format *f)
 799 {
 800         struct video_device *dev = priv;
 801         struct sta2x11_vip *vip = video_get_drvdata(dev);
 802         int interlace_lim;
 803
 804         if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat)
 805                 return -EINVAL;
 806
 807         if (V4L2_STD_525_60 & vip->std)
 808                 interlace_lim = 240;
 809         else
 810                 interlace_lim = 288;
 811
 812         switch (f->fmt.pix.field) {
 813         case V4L2_FIELD_ANY:
 814                 if (interlace_lim < f->fmt.pix.height)
 815                         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 816                 else
 817                         f->fmt.pix.field = V4L2_FIELD_BOTTOM;
 818                 break;
 819         case V4L2_FIELD_TOP:
 820         case V4L2_FIELD_BOTTOM:
 821                 if (interlace_lim < f->fmt.pix.height)
 822                         f->fmt.pix.height = interlace_lim;
 823                 break;
 824         case V4L2_FIELD_INTERLACED:
 825                 break;
 826         default:
 827                 return -EINVAL;
 828         }
 829
 830         f->fmt.pix.height &= ~1;
 831         if (2 * interlace_lim < f->fmt.pix.height)
 832                 f->fmt.pix.height = 2 * interlace_lim;
 833         if (200 > f->fmt.pix.height)
 834                 f->fmt.pix.height = 200;
 835         f->fmt.pix.width = 720;
 836         f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
 837         f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height;
 838         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 839         f->fmt.pix.priv = 0;
 840         return 0;
 841 }
 842
 843 /**
 844  * vidioc_s_fmt_vid_cap - set current video format parameters
 845  * @file: descriptor of device ( not used)
 846  * @priv: points to current videodevice
 847  * @f: returned format information
 848  *
 849  * set new capture format
 850  * return value: 0, no error
 851  *
 852  * other, delivered by video DAC routine.
 853  */
 854 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 855                                 struct v4l2_format *f)
 856 {
 857         struct video_device *dev = priv;
 858         struct sta2x11_vip *vip = video_get_drvdata(dev);
 859         int ret;
 860
 861         ret = vidioc_try_fmt_vid_cap(file, priv, f);
 862         if (ret)
 863                 return ret;
 864
 865         memcpy(&vip->format, &f->fmt.pix, sizeof(struct v4l2_pix_format));
 866         return 0;
 867 }
 868
 869 /**
 870  * vidioc_g_fmt_vid_cap - get current video format parameters
 871  * @file: descriptor of device ( not used)
 872  * @priv: points to current videodevice
 873  * @f: contains format information
 874  *
 875  * returns current video format parameters
 876  *
 877  * return value: 0, always successful
 878  */
 879 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 880                                 struct v4l2_format *f)
 881 {
 882         struct video_device *dev = priv;
 883         struct sta2x11_vip *vip = video_get_drvdata(dev);
 884
 885         memcpy(&f->fmt.pix, &vip->format, sizeof(struct v4l2_pix_format));
 886         return 0;
 887 }
 888
 889 /**
 890  * vidioc_reqfs - request buffer
 891  * @file: descriptor of device ( not used)
 892  * @priv: points to current videodevice
 893  * @p: video buffer
 894  *
 895  * Handling is done in generic videobuf layer.
 896  */
 897 static int vidioc_reqbufs(struct file *file, void *priv,
 898                           struct v4l2_requestbuffers *p)
 899 {
 900         struct video_device *dev = priv;
 901         struct sta2x11_vip *vip = video_get_drvdata(dev);
 902
 903         return videobuf_reqbufs(&vip->vb_vidq, p);
 904 }
 905
 906 /**
 907  * vidioc_querybuf - query buffer
 908  * @file: descriptor of device ( not used)
 909  * @priv: points to current videodevice
 910  * @p: video buffer
 911  *
 912  * query buffer state.
 913  * Handling is done in generic videobuf layer.
 914  */
 915 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
 916 {
 917         struct video_device *dev = priv;
 918         struct sta2x11_vip *vip = video_get_drvdata(dev);
 919
 920         return videobuf_querybuf(&vip->vb_vidq, p);
 921 }
 922
 923 /**
 924  * vidioc_qbuf - queue a buffer
 925  * @file: descriptor of device ( not used)
 926  * @priv: points to current videodevice
 927  * @p: video buffer
 928  *
 929  * Handling is done in generic videobuf layer.
 930  */
 931 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 932 {
 933         struct video_device *dev = priv;
 934         struct sta2x11_vip *vip = video_get_drvdata(dev);
 935
 936         return videobuf_qbuf(&vip->vb_vidq, p);
 937 }
 938
 939 /**
 940  * vidioc_dqbuf - dequeue a buffer
 941  * @file: descriptor of device ( not used)
 942  * @priv: points to current videodevice
 943  * @p: video buffer
 944  *
 945  * Handling is done in generic videobuf layer.
 946  */
 947 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 948 {
 949         struct video_device *dev = priv;
 950         struct sta2x11_vip *vip = video_get_drvdata(dev);
 951
 952         return videobuf_dqbuf(&vip->vb_vidq, p, file->f_flags & O_NONBLOCK);
 953 }
 954
 955 /**
 956  * vidioc_streamon - turn on streaming
 957  * @file: descriptor of device ( not used)
 958  * @priv: points to current videodevice
 959  * @type: type of capture
 960  *
 961  * turn on streaming.
 962  * Handling is done in generic videobuf layer.
 963  */
 964 static int vidioc_streamon(struct file *file, void *priv,
 965                            enum v4l2_buf_type type)
 966 {
 967         struct video_device *dev = priv;
 968         struct sta2x11_vip *vip = video_get_drvdata(dev);
 969
 970         return videobuf_streamon(&vip->vb_vidq);
 971 }
 972
 973 /**
 974  * vidioc_streamoff - turn off streaming
 975  * @file: descriptor of device ( not used)
 976  * @priv: points to current videodevice
 977  * @type: type of capture
 978  *
 979  * turn off streaming.
 980  * Handling is done in generic videobuf layer.
 981  */
 982 static int vidioc_streamoff(struct file *file, void *priv,
 983                             enum v4l2_buf_type type)
 984 {
 985         struct video_device *dev = priv;
 986         struct sta2x11_vip *vip = video_get_drvdata(dev);
 987
 988         return videobuf_streamoff(&vip->vb_vidq);
 989 }
 990
 991 static const struct v4l2_file_operations vip_fops = {
 992         .owner = THIS_MODULE,
 993         .open = vip_open,
 994         .release = vip_close,
 995         .ioctl = video_ioctl2,
 996         .read = vip_read,
 997         .mmap = vip_mmap,
 998         .poll = vip_poll
 999 };
1000
1001 static const struct v4l2_ioctl_ops vip_ioctl_ops = {
1002         .vidioc_querycap = vidioc_querycap,
1003         .vidioc_s_std = vidioc_s_std,
1004         .vidioc_g_std = vidioc_g_std,
1005         .vidioc_querystd = vidioc_querystd,
1006         .vidioc_queryctrl = vidioc_queryctrl,
1007         .vidioc_g_ctrl = vidioc_g_ctrl,
1008         .vidioc_s_ctrl = vidioc_s_ctrl,
1009         .vidioc_enum_input = vidioc_enum_input,
1010         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1011         .vidioc_s_input = vidioc_s_input,
1012         .vidioc_g_input = vidioc_g_input,
1013         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1014         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1015         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1016         .vidioc_reqbufs = vidioc_reqbufs,
1017         .vidioc_querybuf = vidioc_querybuf,
1018         .vidioc_qbuf = vidioc_qbuf,
1019         .vidioc_dqbuf = vidioc_dqbuf,
1020         .vidioc_streamon = vidioc_streamon,
1021         .vidioc_streamoff = vidioc_streamoff,
1022 };
1023
1024 static struct video_device video_dev_template = {
1025         .name = DRV_NAME,
1026         .release = video_device_release,
1027         .fops = &vip_fops,
1028         .ioctl_ops = &vip_ioctl_ops,
1029         .tvnorms = V4L2_STD_ALL,
1030 };
1031
1032 /**
1033  * vip_irq - interrupt routine
1034  * @irq: Number of interrupt ( not used, correct number is assumed )
1035  * @vip: local data structure containing all information
1036  *
1037  * check for both frame interrupts set ( top and bottom ).
1038  * check FIFO overflow, but limit number of log messages after open.
1039  * signal a complete buffer if done.
1040  * dequeue a new buffer if available.
1041  * disable VIP if no buffer available.
1042  *
1043  * return value: IRQ_NONE, interrupt was not generated by VIP
1044  *
1045  * IRQ_HANDLED, interrupt done.
1046  */
1047 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip)
1048 {
1049         u32 status, dma;
1050         unsigned long flags;
1051         struct videobuf_buffer *vb;
1052
1053         status = REG_READ(vip, DVP_ITS);
1054
1055         if (!status) {
1056                 pr_debug("VIP: irq ignored\n");
1057                 return IRQ_NONE;
1058         }
1059
1060         if (!vip->started)
1061                 return IRQ_HANDLED;
1062
1063         if (status & DVP_IT_VSB)
1064                 vip->bcount++;
1065
1066         if (status & DVP_IT_VST)
1067                 vip->tcount++;
1068
1069         if ((DVP_IT_VSB | DVP_IT_VST) == (status & (DVP_IT_VST | DVP_IT_VSB))) {
1070                 /* this is bad, we are too slow, hope the condition is gone
1071                  * on the next frame */
1072                 pr_info("VIP: both irqs\n");
1073                 return IRQ_HANDLED;
1074         }
1075
1076         if (status & DVP_IT_FIFO) {
1077                 if (5 > vip->overflow++)
1078                         pr_info("VIP: fifo overflow\n");
1079         }
1080
1081         if (2 > vip->tcount)
1082                 return IRQ_HANDLED;
1083
1084         if (status & DVP_IT_VSB)
1085                 return IRQ_HANDLED;
1086
1087         spin_lock_irqsave(&vip->slock, flags);
1088
1089         REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) & ~DVP_CTL_ENA);
1090         if (vip->active) {
1091                 do_gettimeofday(&vip->active->ts);
1092                 vip->active->field_count++;
1093                 vip->active->state = VIDEOBUF_DONE;
1094                 wake_up(&vip->active->done);
1095                 vip->active = NULL;
1096         }
1097         if (!vip->closing) {
1098                 if (list_empty(&vip->capture))
1099                         goto done;
1100
1101                 vb = list_first_entry(&vip->capture, struct videobuf_buffer,
1102                                       queue);
1103                 if (NULL == vb) {
1104                         pr_info("VIP: no buffer\n");
1105                         goto done;
1106                 }
1107                 vb->state = VIDEOBUF_ACTIVE;
1108                 list_del(&vb->queue);
1109                 vip->active = vb;
1110                 dma = videobuf_to_dma_contig(vb);
1111                 switch (vip->format.field) {
1112                 case V4L2_FIELD_INTERLACED:
1113                         REG_WRITE(vip, DVP_VTP, dma);
1114                         REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2);
1115                         break;
1116                 case V4L2_FIELD_TOP:
1117                 case V4L2_FIELD_BOTTOM:
1118                         REG_WRITE(vip, DVP_VTP, dma);
1119                         REG_WRITE(vip, DVP_VBP, dma);
1120                         break;
1121                 default:
1122                         pr_warning("VIP: unknown field format\n");
1123                         goto done;
1124                         break;
1125                 }
1126                 REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) | DVP_CTL_ENA);
1127         }
1128 done:
1129         spin_unlock_irqrestore(&vip->slock, flags);
1130         return IRQ_HANDLED;
1131 }
1132
1133 /**
1134  * vip_gpio_reserve - reserve gpio pin
1135  * @dev: device
1136  * @pin: GPIO pin number
1137  * @dir: direction, input or output
1138  * @name: GPIO pin name
1139  *
1140  */
1141 static int vip_gpio_reserve(struct device *dev, int pin, int dir,
1142                             const char *name)
1143 {
1144         int ret;
1145
1146         if (pin == -1)
1147                 return 0;
1148
1149         ret = gpio_request(pin, name);
1150         if (ret) {
1151                 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name);
1152                 return ret;
1153         }
1154
1155         ret = gpio_direction_output(pin, dir);
1156         if (ret) {
1157                 dev_err(dev, "Failed to set direction for pin %d (%s)\n",
1158                         pin, name);
1159                 gpio_free(pin);
1160                 return ret;
1161         }
1162
1163         ret = gpio_export(pin, false);
1164         if (ret) {
1165                 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name);
1166                 gpio_free(pin);
1167                 return ret;
1168         }
1169
1170         return 0;
1171 }
1172
1173 /**
1174  * vip_gpio_release - release gpio pin
1175  * @dev: device
1176  * @pin: GPIO pin number
1177  * @name: GPIO pin name
1178  *
1179  */
1180 static void vip_gpio_release(struct device *dev, int pin, const char *name)
1181 {
1182         if (pin != -1) {
1183                 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name);
1184                 gpio_unexport(pin);
1185                 gpio_free(pin);
1186         }
1187 }
1188
1189 /**
1190  * sta2x11_vip_init_one - init one instance of video device
1191  * @pdev: PCI device
1192  * @ent: (not used)
1193  *
1194  * allocate reset pins for DAC.
1195  * Reset video DAC, this is done via reset line.
1196  * allocate memory for managing device
1197  * request interrupt
1198  * map IO region
1199  * register device
1200  * find and initialize video DAC
1201  *
1202  * return value: 0, no error
1203  *
1204  * -ENOMEM, no memory
1205  *
1206  * -ENODEV, device could not be detected or registered
1207  */
1208 static int __devinit sta2x11_vip_init_one(struct pci_dev *pdev,
1209                                           const struct pci_device_id *ent)
1210 {
1211         int ret;
1212         struct sta2x11_vip *vip;
1213         struct vip_config *config;
1214
1215         ret = pci_enable_device(pdev);
1216         if (ret)
1217                 return ret;
1218
1219         config = dev_get_platdata(&pdev->dev);
1220         if (!config) {
1221                 dev_info(&pdev->dev, "VIP slot disabled\n");
1222                 ret = -EINVAL;
1223                 goto disable;
1224         }
1225
1226         ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0,
1227                                config->pwr_name);
1228         if (ret)
1229                 goto disable;
1230
1231         if (config->reset_pin >= 0) {
1232                 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0,
1233                                        config->reset_name);
1234                 if (ret) {
1235                         vip_gpio_release(&pdev->dev, config->pwr_pin,
1236                                          config->pwr_name);
1237                         goto disable;
1238                 }
1239         }
1240
1241         if (config->pwr_pin != -1) {
1242                 /* Datasheet says 5ms between PWR and RST */
1243                 usleep_range(5000, 25000);
1244                 ret = gpio_direction_output(config->pwr_pin, 1);
1245         }
1246
1247         if (config->reset_pin != -1) {
1248                 /* Datasheet says 5ms between PWR and RST */
1249                 usleep_range(5000, 25000);
1250                 ret = gpio_direction_output(config->reset_pin, 1);
1251         }
1252         usleep_range(5000, 25000);
1253
1254         vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL);
1255         if (!vip) {
1256                 ret = -ENOMEM;
1257                 goto release_gpios;
1258         }
1259
1260         vip->pdev = pdev;
1261         vip->std = V4L2_STD_PAL;
1262         vip->format = formats_50[0];
1263         vip->config = config;
1264
1265         if (v4l2_device_register(&pdev->dev, &vip->v4l2_dev))
1266                 goto free_mem;
1267
1268         dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n",
1269                 (unsigned long)pci_resource_start(pdev, 0),
1270                 (unsigned long)pci_resource_len(pdev, 0), pdev->irq);
1271
1272         pci_set_master(pdev);
1273
1274         ret = pci_request_regions(pdev, DRV_NAME);
1275         if (ret)
1276                 goto unreg;
1277
1278         vip->iomem = pci_iomap(pdev, 0, 0x100);
1279         if (!vip->iomem) {
1280                 ret = -ENOMEM; /* FIXME */
1281                 goto release;
1282         }
1283
1284         pci_enable_msi(pdev);
1285
1286         INIT_LIST_HEAD(&vip->capture);
1287         spin_lock_init(&vip->slock);
1288         mutex_init(&vip->mutex);
1289         vip->started = 0;
1290         vip->disabled = 0;
1291
1292         ret = request_irq(pdev->irq,
1293                           (irq_handler_t) vip_irq,
1294                           IRQF_SHARED, DRV_NAME, vip);
1295         if (ret) {
1296                 dev_err(&pdev->dev, "request_irq failed\n");
1297                 ret = -ENODEV;
1298                 goto unmap;
1299         }
1300
1301         vip->video_dev = video_device_alloc();
1302         if (!vip->video_dev) {
1303                 ret = -ENOMEM;
1304                 goto release_irq;
1305         }
1306
1307         *(vip->video_dev) = video_dev_template;
1308         video_set_drvdata(vip->video_dev, vip);
1309
1310         ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1);
1311         if (ret)
1312                 goto vrelease;
1313
1314         vip->adapter = i2c_get_adapter(vip->config->i2c_id);
1315         if (!vip->adapter) {
1316                 ret = -ENODEV;
1317                 dev_err(&pdev->dev, "no I2C adapter found\n");
1318                 goto vunreg;
1319         }
1320
1321         vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter,
1322                                            "adv7180", vip->config->i2c_addr,
1323                                            NULL);
1324         if (!vip->decoder) {
1325                 ret = -ENODEV;
1326                 dev_err(&pdev->dev, "no decoder found\n");
1327                 goto vunreg;
1328         }
1329
1330         i2c_put_adapter(vip->adapter);
1331
1332         v4l2_subdev_call(vip->decoder, core, init, 0);
1333
1334         pr_info("STA2X11 Video Input Port (VIP) loaded\n");
1335         return 0;
1336
1337 vunreg:
1338         video_set_drvdata(vip->video_dev, NULL);
1339 vrelease:
1340         if (video_is_registered(vip->video_dev))
1341                 video_unregister_device(vip->video_dev);
1342         else
1343                 video_device_release(vip->video_dev);
1344 release_irq:
1345         free_irq(pdev->irq, vip);
1346         pci_disable_msi(pdev);
1347 unmap:
1348         pci_iounmap(pdev, vip->iomem);
1349         mutex_destroy(&vip->mutex);
1350 release:
1351         pci_release_regions(pdev);
1352 unreg:
1353         v4l2_device_unregister(&vip->v4l2_dev);
1354 free_mem:
1355         kfree(vip);
1356 release_gpios:
1357         vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name);
1358         vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name);
1359 disable:
1360         /*
1361          * do not call pci_disable_device on sta2x11 because it break all
1362          * other Bus masters on this EP
1363          */
1364         return ret;
1365 }
1366
1367 /**
1368  * sta2x11_vip_remove_one - release device
1369  * @pdev: PCI device
1370  *
1371  * Undo everything done in .._init_one
1372  *
1373  * unregister video device
1374  * free interrupt
1375  * unmap ioadresses
1376  * free memory
1377  * free GPIO pins
1378  */
1379 static void __devexit sta2x11_vip_remove_one(struct pci_dev *pdev)
1380 {
1381         struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1382         struct sta2x11_vip *vip =
1383             container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1384
1385         video_set_drvdata(vip->video_dev, NULL);
1386         video_unregister_device(vip->video_dev);
1387         /*do not call video_device_release() here, is already done */
1388         free_irq(pdev->irq, vip);
1389         pci_disable_msi(pdev);
1390         pci_iounmap(pdev, vip->iomem);
1391         pci_release_regions(pdev);
1392
1393         v4l2_device_unregister(&vip->v4l2_dev);
1394         mutex_destroy(&vip->mutex);
1395
1396         vip_gpio_release(&pdev->dev, vip->config->pwr_pin,
1397                          vip->config->pwr_name);
1398         vip_gpio_release(&pdev->dev, vip->config->reset_pin,
1399                          vip->config->reset_name);
1400
1401         kfree(vip);
1402         /*
1403          * do not call pci_disable_device on sta2x11 because it break all
1404          * other Bus masters on this EP
1405          */
1406 }
1407
1408 #ifdef CONFIG_PM
1409
1410 /**
1411  * sta2x11_vip_suspend - set device into power save mode
1412  * @pdev: PCI device
1413  * @state: new state of device
1414  *
1415  * all relevant registers are saved and an attempt to set a new state is made.
1416  *
1417  * return value: 0 always indicate success,
1418  * even if device could not be disabled. (workaround for hardware problem)
1419  *
1420  * reurn value : 0, always succesful, even if hardware does not not support
1421  * power down mode.
1422  */
1423 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state)
1424 {
1425         struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1426         struct sta2x11_vip *vip =
1427             container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1428         unsigned long flags;
1429         int i;
1430
1431         spin_lock_irqsave(&vip->slock, flags);
1432         vip->register_save_area[0] = REG_READ(vip, DVP_CTL);
1433         REG_WRITE(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS);
1434         vip->register_save_area[SAVE_COUNT] = REG_READ(vip, DVP_ITM);
1435         REG_WRITE(vip, DVP_ITM, 0);
1436         for (i = 1; i < SAVE_COUNT; i++)
1437                 vip->register_save_area[i] = REG_READ(vip, 4 * i);
1438         for (i = 0; i < AUX_COUNT; i++)
1439                 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] =
1440                     REG_READ(vip, registers_to_save[i]);
1441         spin_unlock_irqrestore(&vip->slock, flags);
1442         /* save pci state */
1443         pci_save_state(pdev);
1444         if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) {
1445                 /*
1446                  * do not call pci_disable_device on sta2x11 because it
1447                  * break all other Bus masters on this EP
1448                  */
1449                 vip->disabled = 1;
1450         }
1451
1452         pr_info("VIP: suspend\n");
1453         return 0;
1454 }
1455
1456 /**
1457  * sta2x11_vip_resume - resume device operation
1458  * @pdev : PCI device
1459  *
1460  * re-enable device, set PCI state to powered and restore registers.
1461  * resume normal device operation afterwards.
1462  *
1463  * return value: 0, no error.
1464  *
1465  * other, could not set device to power on state.
1466  */
1467 static int sta2x11_vip_resume(struct pci_dev *pdev)
1468 {
1469         struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1470         struct sta2x11_vip *vip =
1471             container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1472         unsigned long flags;
1473         int ret, i;
1474
1475         pr_info("VIP: resume\n");
1476         /* restore pci state */
1477         if (vip->disabled) {
1478                 ret = pci_enable_device(pdev);
1479                 if (ret) {
1480                         pr_warning("VIP: Can't enable device.\n");
1481                         return ret;
1482                 }
1483                 vip->disabled = 0;
1484         }
1485         ret = pci_set_power_state(pdev, PCI_D0);
1486         if (ret) {
1487                 /*
1488                  * do not call pci_disable_device on sta2x11 because it
1489                  * break all other Bus masters on this EP
1490                  */
1491                 pr_warning("VIP: Can't enable device.\n");
1492                 vip->disabled = 1;
1493                 return ret;
1494         }
1495
1496         pci_restore_state(pdev);
1497
1498         spin_lock_irqsave(&vip->slock, flags);
1499         for (i = 1; i < SAVE_COUNT; i++)
1500                 REG_WRITE(vip, 4 * i, vip->register_save_area[i]);
1501         for (i = 0; i < AUX_COUNT; i++)
1502                 REG_WRITE(vip, registers_to_save[i],
1503                           vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]);
1504         REG_WRITE(vip, DVP_CTL, vip->register_save_area[0]);
1505         REG_WRITE(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]);
1506         spin_unlock_irqrestore(&vip->slock, flags);
1507         return 0;
1508 }
1509
1510 #endif
1511
1512 static DEFINE_PCI_DEVICE_TABLE(sta2x11_vip_pci_tbl) = {
1513         {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)},
1514         {0,}
1515 };
1516
1517 static struct pci_driver sta2x11_vip_driver = {
1518         .name = DRV_NAME,
1519         .probe = sta2x11_vip_init_one,
1520         .remove = __devexit_p(sta2x11_vip_remove_one),
1521         .id_table = sta2x11_vip_pci_tbl,
1522 #ifdef CONFIG_PM
1523         .suspend = sta2x11_vip_suspend,
1524         .resume = sta2x11_vip_resume,
1525 #endif
1526 };
1527
1528 static int __init sta2x11_vip_init_module(void)
1529 {
1530         return pci_register_driver(&sta2x11_vip_driver);
1531 }
1532
1533 static void __exit sta2x11_vip_exit_module(void)
1534 {
1535         pci_unregister_driver(&sta2x11_vip_driver);
1536 }
1537
1538 #ifdef MODULE
1539 module_init(sta2x11_vip_init_module);
1540 module_exit(sta2x11_vip_exit_module);
1541 #else
1542 late_initcall_sync(sta2x11_vip_init_module);
1543 #endif
1544
1545 MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
1546 MODULE_AUTHOR("Wind River");
1547 MODULE_LICENSE("GPL v2");
1548 MODULE_SUPPORTED_DEVICE("sta2x11 video input");
1549 MODULE_VERSION(DRV_VERSION);
1550 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);