drivers/media/pci/sta2x11/sta2x11

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This source file includes following definitions.
to_vip_buffer
reg_write
reg_read
start_dma
vip_active_buf_next
queue_setup
buffer_init
buffer_prepare
buffer_queue
buffer_finish
start_streaming
stop_streaming
vidioc_querycap
vidioc_s_std
vidioc_g_std
vidioc_querystd
vidioc_enum_input
vidioc_s_input
vidioc_g_input
vidioc_enum_fmt_vid_cap
vidioc_try_fmt_vid_cap
vidioc_s_fmt_vid_cap
vidioc_g_fmt_vid_cap
vip_irq
sta2x11_vip_init_register
sta2x11_vip_clear_register
sta2x11_vip_init_buffer
sta2x11_vip_init_controls
vip_gpio_reserve
vip_gpio_release
sta2x11_vip_init_one
sta2x11_vip_remove_one
sta2x11_vip_suspend
sta2x11_vip_resume
sta2x11_vip_init_module
sta2x11_vip_exit_module
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * This is the driver for the STA2x11 Video Input Port.
   4  *
   5  * Copyright (C) 2012       ST Microelectronics
   6  *     author: Federico Vaga <federico.vaga@gmail.com>
   7  * Copyright (C) 2010       WindRiver Systems, Inc.
   8  *     authors: Andreas Kies <andreas.kies@windriver.com>
   9  *              Vlad Lungu   <vlad.lungu@windriver.com>
  10  */
  11 
  12 #include <linux/types.h>
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/videodev2.h>
  17 #include <linux/kmod.h>
  18 #include <linux/pci.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/io.h>
  21 #include <linux/gpio.h>
  22 #include <linux/i2c.h>
  23 #include <linux/delay.h>
  24 #include <media/v4l2-common.h>
  25 #include <media/v4l2-device.h>
  26 #include <media/v4l2-ctrls.h>
  27 #include <media/v4l2-ioctl.h>
  28 #include <media/v4l2-fh.h>
  29 #include <media/v4l2-event.h>
  30 #include <media/videobuf2-dma-contig.h>
  31 
  32 #include "sta2x11_vip.h"
  33 
  34 #define DRV_VERSION "1.3"
  35 
  36 #ifndef PCI_DEVICE_ID_STMICRO_VIP
  37 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D
  38 #endif
  39 
  40 #define MAX_FRAMES 4
  41 
  42 /*Register offsets*/
  43 #define DVP_CTL         0x00
  44 #define DVP_TFO         0x04
  45 #define DVP_TFS         0x08
  46 #define DVP_BFO         0x0C
  47 #define DVP_BFS         0x10
  48 #define DVP_VTP         0x14
  49 #define DVP_VBP         0x18
  50 #define DVP_VMP         0x1C
  51 #define DVP_ITM         0x98
  52 #define DVP_ITS         0x9C
  53 #define DVP_STA         0xA0
  54 #define DVP_HLFLN       0xA8
  55 #define DVP_RGB         0xC0
  56 #define DVP_PKZ         0xF0
  57 
  58 /*Register fields*/
  59 #define DVP_CTL_ENA     0x00000001
  60 #define DVP_CTL_RST     0x80000000
  61 #define DVP_CTL_DIS     (~0x00040001)
  62 
  63 #define DVP_IT_VSB      0x00000008
  64 #define DVP_IT_VST      0x00000010
  65 #define DVP_IT_FIFO     0x00000020
  66 
  67 #define DVP_HLFLN_SD    0x00000001
  68 
  69 #define SAVE_COUNT 8
  70 #define AUX_COUNT 3
  71 #define IRQ_COUNT 1
  72 
  73 
  74 struct vip_buffer {
  75         struct vb2_v4l2_buffer vb;
  76         struct list_head        list;
  77         dma_addr_t              dma;
  78 };
  79 static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2)
  80 {
  81         return container_of(vb2, struct vip_buffer, vb);
  82 }
  83 
  84 /**
  85  * struct sta2x11_vip - All internal data for one instance of device
  86  * @v4l2_dev: device registered in v4l layer
  87  * @video_dev: properties of our device
  88  * @pdev: PCI device
  89  * @adapter: contains I2C adapter information
  90  * @register_save_area: All relevant register are saved here during suspend
  91  * @decoder: contains information about video DAC
  92  * @ctrl_hdl: handler for control framework
  93  * @format: pixel format, fixed UYVY
  94  * @std: video standard (e.g. PAL/NTSC)
  95  * @input: input line for video signal ( 0 or 1 )
  96  * @disabled: Device is in power down state
  97  * @slock: for excluse access of registers
  98  * @vb_vidq: queue maintained by videobuf2 layer
  99  * @buffer_list: list of buffer in use
 100  * @sequence: sequence number of acquired buffer
 101  * @active: current active buffer
 102  * @lock: used in videobuf2 callback
 103  * @v4l_lock: serialize its video4linux ioctls
 104  * @tcount: Number of top frames
 105  * @bcount: Number of bottom frames
 106  * @overflow: Number of FIFO overflows
 107  * @iomem: hardware base address
 108  * @config: I2C and gpio config from platform
 109  *
 110  * All non-local data is accessed via this structure.
 111  */
 112 struct sta2x11_vip {
 113         struct v4l2_device v4l2_dev;
 114         struct video_device video_dev;
 115         struct pci_dev *pdev;
 116         struct i2c_adapter *adapter;
 117         unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT];
 118         struct v4l2_subdev *decoder;
 119         struct v4l2_ctrl_handler ctrl_hdl;
 120 
 121 
 122         struct v4l2_pix_format format;
 123         v4l2_std_id std;
 124         unsigned int input;
 125         int disabled;
 126         spinlock_t slock;
 127 
 128         struct vb2_queue vb_vidq;
 129         struct list_head buffer_list;
 130         unsigned int sequence;
 131         struct vip_buffer *active; /* current active buffer */
 132         spinlock_t lock; /* Used in videobuf2 callback */
 133         struct mutex v4l_lock;
 134 
 135         /* Interrupt counters */
 136         int tcount, bcount;
 137         int overflow;
 138 
 139         void __iomem *iomem;    /* I/O Memory */
 140         struct vip_config *config;
 141 };
 142 
 143 static const unsigned int registers_to_save[AUX_COUNT] = {
 144         DVP_HLFLN, DVP_RGB, DVP_PKZ
 145 };
 146 
 147 static struct v4l2_pix_format formats_50[] = {
 148         {                       /*PAL interlaced */
 149          .width = 720,
 150          .height = 576,
 151          .pixelformat = V4L2_PIX_FMT_UYVY,
 152          .field = V4L2_FIELD_INTERLACED,
 153          .bytesperline = 720 * 2,
 154          .sizeimage = 720 * 2 * 576,
 155          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 156         {                       /*PAL top */
 157          .width = 720,
 158          .height = 288,
 159          .pixelformat = V4L2_PIX_FMT_UYVY,
 160          .field = V4L2_FIELD_TOP,
 161          .bytesperline = 720 * 2,
 162          .sizeimage = 720 * 2 * 288,
 163          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 164         {                       /*PAL bottom */
 165          .width = 720,
 166          .height = 288,
 167          .pixelformat = V4L2_PIX_FMT_UYVY,
 168          .field = V4L2_FIELD_BOTTOM,
 169          .bytesperline = 720 * 2,
 170          .sizeimage = 720 * 2 * 288,
 171          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 172 
 173 };
 174 
 175 static struct v4l2_pix_format formats_60[] = {
 176         {                       /*NTSC interlaced */
 177          .width = 720,
 178          .height = 480,
 179          .pixelformat = V4L2_PIX_FMT_UYVY,
 180          .field = V4L2_FIELD_INTERLACED,
 181          .bytesperline = 720 * 2,
 182          .sizeimage = 720 * 2 * 480,
 183          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 184         {                       /*NTSC top */
 185          .width = 720,
 186          .height = 240,
 187          .pixelformat = V4L2_PIX_FMT_UYVY,
 188          .field = V4L2_FIELD_TOP,
 189          .bytesperline = 720 * 2,
 190          .sizeimage = 720 * 2 * 240,
 191          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 192         {                       /*NTSC bottom */
 193          .width = 720,
 194          .height = 240,
 195          .pixelformat = V4L2_PIX_FMT_UYVY,
 196          .field = V4L2_FIELD_BOTTOM,
 197          .bytesperline = 720 * 2,
 198          .sizeimage = 720 * 2 * 240,
 199          .colorspace = V4L2_COLORSPACE_SMPTE170M},
 200 };
 201 
 202 /* Write VIP register */
 203 static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val)
 204 {
 205         iowrite32((val), (vip->iomem)+(reg));
 206 }
 207 /* Read VIP register */
 208 static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg)
 209 {
 210         return  ioread32((vip->iomem)+(reg));
 211 }
 212 /* Start DMA acquisition */
 213 static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf)
 214 {
 215         unsigned long offset = 0;
 216 
 217         if (vip->format.field == V4L2_FIELD_INTERLACED)
 218                 offset = vip->format.width * 2;
 219 
 220         spin_lock_irq(&vip->slock);
 221         /* Enable acquisition */
 222         reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA);
 223         /* Set Top and Bottom Field memory address */
 224         reg_write(vip, DVP_VTP, (u32)vip_buf->dma);
 225         reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset);
 226         spin_unlock_irq(&vip->slock);
 227 }
 228 
 229 /* Fetch the next buffer to activate */
 230 static void vip_active_buf_next(struct sta2x11_vip *vip)
 231 {
 232         /* Get the next buffer */
 233         spin_lock(&vip->lock);
 234         if (list_empty(&vip->buffer_list)) {/* No available buffer */
 235                 spin_unlock(&vip->lock);
 236                 return;
 237         }
 238         vip->active = list_first_entry(&vip->buffer_list,
 239                                        struct vip_buffer,
 240                                        list);
 241         /* Reset Top and Bottom counter */
 242         vip->tcount = 0;
 243         vip->bcount = 0;
 244         spin_unlock(&vip->lock);
 245         if (vb2_is_streaming(&vip->vb_vidq)) {  /* streaming is on */
 246                 start_dma(vip, vip->active);    /* start dma capture */
 247         }
 248 }
 249 
 250 
 251 /* Videobuf2 Operations */
 252 static int queue_setup(struct vb2_queue *vq,
 253                        unsigned int *nbuffers, unsigned int *nplanes,
 254                        unsigned int sizes[], struct device *alloc_devs[])
 255 {
 256         struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
 257 
 258         if (!(*nbuffers) || *nbuffers < MAX_FRAMES)
 259                 *nbuffers = MAX_FRAMES;
 260 
 261         *nplanes = 1;
 262         sizes[0] = vip->format.sizeimage;
 263 
 264         vip->sequence = 0;
 265         vip->active = NULL;
 266         vip->tcount = 0;
 267         vip->bcount = 0;
 268 
 269         return 0;
 270 };
 271 static int buffer_init(struct vb2_buffer *vb)
 272 {
 273         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 274         struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
 275 
 276         vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0);
 277         INIT_LIST_HEAD(&vip_buf->list);
 278         return 0;
 279 }
 280 
 281 static int buffer_prepare(struct vb2_buffer *vb)
 282 {
 283         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 284         struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
 285         struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
 286         unsigned long size;
 287 
 288         size = vip->format.sizeimage;
 289         if (vb2_plane_size(vb, 0) < size) {
 290                 v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n",
 291                          vb2_plane_size(vb, 0), size);
 292                 return -EINVAL;
 293         }
 294 
 295         vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size);
 296 
 297         return 0;
 298 }
 299 static void buffer_queue(struct vb2_buffer *vb)
 300 {
 301         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 302         struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
 303         struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
 304 
 305         spin_lock(&vip->lock);
 306         list_add_tail(&vip_buf->list, &vip->buffer_list);
 307         if (!vip->active) {     /* No active buffer, active the first one */
 308                 vip->active = list_first_entry(&vip->buffer_list,
 309                                                struct vip_buffer,
 310                                                list);
 311                 if (vb2_is_streaming(&vip->vb_vidq))    /* streaming is on */
 312                         start_dma(vip, vip_buf);        /* start dma capture */
 313         }
 314         spin_unlock(&vip->lock);
 315 }
 316 static void buffer_finish(struct vb2_buffer *vb)
 317 {
 318         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 319         struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
 320         struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
 321 
 322         /* Buffer handled, remove it from the list */
 323         spin_lock(&vip->lock);
 324         list_del_init(&vip_buf->list);
 325         spin_unlock(&vip->lock);
 326 
 327         if (vb2_is_streaming(vb->vb2_queue))
 328                 vip_active_buf_next(vip);
 329 }
 330 
 331 static int start_streaming(struct vb2_queue *vq, unsigned int count)
 332 {
 333         struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
 334 
 335         spin_lock_irq(&vip->slock);
 336         /* Enable interrupt VSYNC Top and Bottom*/
 337         reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST);
 338         spin_unlock_irq(&vip->slock);
 339 
 340         if (count)
 341                 start_dma(vip, vip->active);
 342 
 343         return 0;
 344 }
 345 
 346 /* abort streaming and wait for last buffer */
 347 static void stop_streaming(struct vb2_queue *vq)
 348 {
 349         struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
 350         struct vip_buffer *vip_buf, *node;
 351 
 352         /* Disable acquisition */
 353         reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
 354         /* Disable all interrupts */
 355         reg_write(vip, DVP_ITM, 0);
 356 
 357         /* Release all active buffers */
 358         spin_lock(&vip->lock);
 359         list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) {
 360                 vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 361                 list_del(&vip_buf->list);
 362         }
 363         spin_unlock(&vip->lock);
 364 }
 365 
 366 static const struct vb2_ops vip_video_qops = {
 367         .queue_setup            = queue_setup,
 368         .buf_init               = buffer_init,
 369         .buf_prepare            = buffer_prepare,
 370         .buf_finish             = buffer_finish,
 371         .buf_queue              = buffer_queue,
 372         .start_streaming        = start_streaming,
 373         .stop_streaming         = stop_streaming,
 374         .wait_prepare           = vb2_ops_wait_prepare,
 375         .wait_finish            = vb2_ops_wait_finish,
 376 };
 377 
 378 
 379 /* File Operations */
 380 static const struct v4l2_file_operations vip_fops = {
 381         .owner = THIS_MODULE,
 382         .open = v4l2_fh_open,
 383         .release = vb2_fop_release,
 384         .unlocked_ioctl = video_ioctl2,
 385         .read = vb2_fop_read,
 386         .mmap = vb2_fop_mmap,
 387         .poll = vb2_fop_poll
 388 };
 389 
 390 
 391 /**
 392  * vidioc_querycap - return capabilities of device
 393  * @file: descriptor of device
 394  * @cap: contains return values
 395  * @priv: unused
 396  *
 397  * the capabilities of the device are returned
 398  *
 399  * return value: 0, no error.
 400  */
 401 static int vidioc_querycap(struct file *file, void *priv,
 402                            struct v4l2_capability *cap)
 403 {
 404         struct sta2x11_vip *vip = video_drvdata(file);
 405 
 406         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 407         strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card));
 408         snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
 409                  pci_name(vip->pdev));
 410         return 0;
 411 }
 412 
 413 /**
 414  * vidioc_s_std - set video standard
 415  * @file: descriptor of device
 416  * @std: contains standard to be set
 417  * @priv: unused
 418  *
 419  * the video standard is set
 420  *
 421  * return value: 0, no error.
 422  *
 423  * -EIO, no input signal detected
 424  *
 425  * other, returned from video DAC.
 426  */
 427 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std)
 428 {
 429         struct sta2x11_vip *vip = video_drvdata(file);
 430 
 431         /*
 432          * This is here for backwards compatibility only.
 433          * The use of V4L2_STD_ALL to trigger a querystd is non-standard.
 434          */
 435         if (std == V4L2_STD_ALL) {
 436                 v4l2_subdev_call(vip->decoder, video, querystd, &std);
 437                 if (std == V4L2_STD_UNKNOWN)
 438                         return -EIO;
 439         }
 440 
 441         if (vip->std != std) {
 442                 vip->std = std;
 443                 if (V4L2_STD_525_60 & std)
 444                         vip->format = formats_60[0];
 445                 else
 446                         vip->format = formats_50[0];
 447         }
 448 
 449         return v4l2_subdev_call(vip->decoder, video, s_std, std);
 450 }
 451 
 452 /**
 453  * vidioc_g_std - get video standard
 454  * @file: descriptor of device
 455  * @priv: unused
 456  * @std: contains return values
 457  *
 458  * the current video standard is returned
 459  *
 460  * return value: 0, no error.
 461  */
 462 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
 463 {
 464         struct sta2x11_vip *vip = video_drvdata(file);
 465 
 466         *std = vip->std;
 467         return 0;
 468 }
 469 
 470 /**
 471  * vidioc_querystd - get possible video standards
 472  * @file: descriptor of device
 473  * @priv: unused
 474  * @std: contains return values
 475  *
 476  * all possible video standards are returned
 477  *
 478  * return value: delivered by video DAC routine.
 479  */
 480 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std)
 481 {
 482         struct sta2x11_vip *vip = video_drvdata(file);
 483 
 484         return v4l2_subdev_call(vip->decoder, video, querystd, std);
 485 }
 486 
 487 static int vidioc_enum_input(struct file *file, void *priv,
 488                              struct v4l2_input *inp)
 489 {
 490         if (inp->index > 1)
 491                 return -EINVAL;
 492 
 493         inp->type = V4L2_INPUT_TYPE_CAMERA;
 494         inp->std = V4L2_STD_ALL;
 495         sprintf(inp->name, "Camera %u", inp->index);
 496 
 497         return 0;
 498 }
 499 
 500 /**
 501  * vidioc_s_input - set input line
 502  * @file: descriptor of device
 503  * @priv: unused
 504  * @i: new input line number
 505  *
 506  * the current active input line is set
 507  *
 508  * return value: 0, no error.
 509  *
 510  * -EINVAL, line number out of range
 511  */
 512 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 513 {
 514         struct sta2x11_vip *vip = video_drvdata(file);
 515         int ret;
 516 
 517         if (i > 1)
 518                 return -EINVAL;
 519         ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0);
 520 
 521         if (!ret)
 522                 vip->input = i;
 523 
 524         return 0;
 525 }
 526 
 527 /**
 528  * vidioc_g_input - return input line
 529  * @file: descriptor of device
 530  * @priv: unused
 531  * @i: returned input line number
 532  *
 533  * the current active input line is returned
 534  *
 535  * return value: always 0.
 536  */
 537 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 538 {
 539         struct sta2x11_vip *vip = video_drvdata(file);
 540 
 541         *i = vip->input;
 542         return 0;
 543 }
 544 
 545 /**
 546  * vidioc_enum_fmt_vid_cap - return video capture format
 547  * @file: descriptor of device
 548  * @priv: unused
 549  * @f: returned format information
 550  *
 551  * returns name and format of video capture
 552  * Only UYVY is supported by hardware.
 553  *
 554  * return value: always 0.
 555  */
 556 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 557                                    struct v4l2_fmtdesc *f)
 558 {
 559 
 560         if (f->index != 0)
 561                 return -EINVAL;
 562 
 563         f->pixelformat = V4L2_PIX_FMT_UYVY;
 564         return 0;
 565 }
 566 
 567 /**
 568  * vidioc_try_fmt_vid_cap - set video capture format
 569  * @file: descriptor of device
 570  * @priv: unused
 571  * @f: new format
 572  *
 573  * new video format is set which includes width and
 574  * field type. width is fixed to 720, no scaling.
 575  * Only UYVY is supported by this hardware.
 576  * the minimum height is 200, the maximum is 576 (PAL)
 577  *
 578  * return value: 0, no error
 579  *
 580  * -EINVAL, pixel or field format not supported
 581  *
 582  */
 583 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 584                                   struct v4l2_format *f)
 585 {
 586         struct sta2x11_vip *vip = video_drvdata(file);
 587         int interlace_lim;
 588 
 589         if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) {
 590                 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n");
 591                 return -EINVAL;
 592         }
 593 
 594         if (V4L2_STD_525_60 & vip->std)
 595                 interlace_lim = 240;
 596         else
 597                 interlace_lim = 288;
 598 
 599         switch (f->fmt.pix.field) {
 600         default:
 601         case V4L2_FIELD_ANY:
 602                 if (interlace_lim < f->fmt.pix.height)
 603                         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 604                 else
 605                         f->fmt.pix.field = V4L2_FIELD_BOTTOM;
 606                 break;
 607         case V4L2_FIELD_TOP:
 608         case V4L2_FIELD_BOTTOM:
 609                 if (interlace_lim < f->fmt.pix.height)
 610                         f->fmt.pix.height = interlace_lim;
 611                 break;
 612         case V4L2_FIELD_INTERLACED:
 613                 break;
 614         }
 615 
 616         /* It is the only supported format */
 617         f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
 618         f->fmt.pix.height &= ~1;
 619         if (2 * interlace_lim < f->fmt.pix.height)
 620                 f->fmt.pix.height = 2 * interlace_lim;
 621         if (200 > f->fmt.pix.height)
 622                 f->fmt.pix.height = 200;
 623         f->fmt.pix.width = 720;
 624         f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
 625         f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height;
 626         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 627         return 0;
 628 }
 629 
 630 /**
 631  * vidioc_s_fmt_vid_cap - set current video format parameters
 632  * @file: descriptor of device
 633  * @priv: unused
 634  * @f: returned format information
 635  *
 636  * set new capture format
 637  * return value: 0, no error
 638  *
 639  * other, delivered by video DAC routine.
 640  */
 641 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 642                                 struct v4l2_format *f)
 643 {
 644         struct sta2x11_vip *vip = video_drvdata(file);
 645         unsigned int t_stop, b_stop, pitch;
 646         int ret;
 647 
 648         ret = vidioc_try_fmt_vid_cap(file, priv, f);
 649         if (ret)
 650                 return ret;
 651 
 652         if (vb2_is_busy(&vip->vb_vidq)) {
 653                 /* Can't change format during acquisition */
 654                 v4l2_err(&vip->v4l2_dev, "device busy\n");
 655                 return -EBUSY;
 656         }
 657         vip->format = f->fmt.pix;
 658         switch (vip->format.field) {
 659         case V4L2_FIELD_INTERLACED:
 660                 t_stop = ((vip->format.height / 2 - 1) << 16) |
 661                          (2 * vip->format.width - 1);
 662                 b_stop = t_stop;
 663                 pitch = 4 * vip->format.width;
 664                 break;
 665         case V4L2_FIELD_TOP:
 666                 t_stop = ((vip->format.height - 1) << 16) |
 667                          (2 * vip->format.width - 1);
 668                 b_stop = (0 << 16) | (2 * vip->format.width - 1);
 669                 pitch = 2 * vip->format.width;
 670                 break;
 671         case V4L2_FIELD_BOTTOM:
 672                 t_stop = (0 << 16) | (2 * vip->format.width - 1);
 673                 b_stop = (vip->format.height << 16) |
 674                          (2 * vip->format.width - 1);
 675                 pitch = 2 * vip->format.width;
 676                 break;
 677         default:
 678                 v4l2_err(&vip->v4l2_dev, "unknown field format\n");
 679                 return -EINVAL;
 680         }
 681 
 682         spin_lock_irq(&vip->slock);
 683         /* Y-X Top Field Offset */
 684         reg_write(vip, DVP_TFO, 0);
 685         /* Y-X Bottom Field Offset */
 686         reg_write(vip, DVP_BFO, 0);
 687         /* Y-X Top Field Stop*/
 688         reg_write(vip, DVP_TFS, t_stop);
 689         /* Y-X Bottom Field Stop */
 690         reg_write(vip, DVP_BFS, b_stop);
 691         /* Video Memory Pitch */
 692         reg_write(vip, DVP_VMP, pitch);
 693         spin_unlock_irq(&vip->slock);
 694 
 695         return 0;
 696 }
 697 
 698 /**
 699  * vidioc_g_fmt_vid_cap - get current video format parameters
 700  * @file: descriptor of device
 701  * @priv: unused
 702  * @f: contains format information
 703  *
 704  * returns current video format parameters
 705  *
 706  * return value: 0, always successful
 707  */
 708 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 709                                 struct v4l2_format *f)
 710 {
 711         struct sta2x11_vip *vip = video_drvdata(file);
 712 
 713         f->fmt.pix = vip->format;
 714 
 715         return 0;
 716 }
 717 
 718 static const struct v4l2_ioctl_ops vip_ioctl_ops = {
 719         .vidioc_querycap = vidioc_querycap,
 720         /* FMT handling */
 721         .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
 722         .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
 723         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 724         .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
 725         /* Buffer handlers */
 726         .vidioc_create_bufs = vb2_ioctl_create_bufs,
 727         .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
 728         .vidioc_reqbufs = vb2_ioctl_reqbufs,
 729         .vidioc_querybuf = vb2_ioctl_querybuf,
 730         .vidioc_qbuf = vb2_ioctl_qbuf,
 731         .vidioc_dqbuf = vb2_ioctl_dqbuf,
 732         /* Stream on/off */
 733         .vidioc_streamon = vb2_ioctl_streamon,
 734         .vidioc_streamoff = vb2_ioctl_streamoff,
 735         /* Standard handling */
 736         .vidioc_g_std = vidioc_g_std,
 737         .vidioc_s_std = vidioc_s_std,
 738         .vidioc_querystd = vidioc_querystd,
 739         /* Input handling */
 740         .vidioc_enum_input = vidioc_enum_input,
 741         .vidioc_g_input = vidioc_g_input,
 742         .vidioc_s_input = vidioc_s_input,
 743         /* Log status ioctl */
 744         .vidioc_log_status = v4l2_ctrl_log_status,
 745         /* Event handling */
 746         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 747         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 748 };
 749 
 750 static const struct video_device video_dev_template = {
 751         .name = KBUILD_MODNAME,
 752         .release = video_device_release_empty,
 753         .fops = &vip_fops,
 754         .ioctl_ops = &vip_ioctl_ops,
 755         .tvnorms = V4L2_STD_ALL,
 756         .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 757                        V4L2_CAP_STREAMING,
 758 };
 759 
 760 /**
 761  * vip_irq - interrupt routine
 762  * @irq: Number of interrupt ( not used, correct number is assumed )
 763  * @vip: local data structure containing all information
 764  *
 765  * check for both frame interrupts set ( top and bottom ).
 766  * check FIFO overflow, but limit number of log messages after open.
 767  * signal a complete buffer if done
 768  *
 769  * return value: IRQ_NONE, interrupt was not generated by VIP
 770  *
 771  * IRQ_HANDLED, interrupt done.
 772  */
 773 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip)
 774 {
 775         unsigned int status;
 776 
 777         status = reg_read(vip, DVP_ITS);
 778 
 779         if (!status)            /* No interrupt to handle */
 780                 return IRQ_NONE;
 781 
 782         if (status & DVP_IT_FIFO)
 783                 if (vip->overflow++ > 5)
 784                         pr_info("VIP: fifo overflow\n");
 785 
 786         if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) {
 787                 /* this is bad, we are too slow, hope the condition is gone
 788                  * on the next frame */
 789                 return IRQ_HANDLED;
 790         }
 791 
 792         if (status & DVP_IT_VST)
 793                 if ((++vip->tcount) < 2)
 794                         return IRQ_HANDLED;
 795         if (status & DVP_IT_VSB) {
 796                 vip->bcount++;
 797                 return IRQ_HANDLED;
 798         }
 799 
 800         if (vip->active) { /* Acquisition is over on this buffer */
 801                 /* Disable acquisition */
 802                 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
 803                 /* Remove the active buffer from the list */
 804                 vip->active->vb.vb2_buf.timestamp = ktime_get_ns();
 805                 vip->active->vb.sequence = vip->sequence++;
 806                 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE);
 807         }
 808 
 809         return IRQ_HANDLED;
 810 }
 811 
 812 static void sta2x11_vip_init_register(struct sta2x11_vip *vip)
 813 {
 814         /* Register initialization */
 815         spin_lock_irq(&vip->slock);
 816         /* Clean interrupt */
 817         reg_read(vip, DVP_ITS);
 818         /* Enable Half Line per vertical */
 819         reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD);
 820         /* Reset VIP control */
 821         reg_write(vip, DVP_CTL, DVP_CTL_RST);
 822         /* Clear VIP control */
 823         reg_write(vip, DVP_CTL, 0);
 824         spin_unlock_irq(&vip->slock);
 825 }
 826 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip)
 827 {
 828         spin_lock_irq(&vip->slock);
 829         /* Disable interrupt */
 830         reg_write(vip, DVP_ITM, 0);
 831         /* Reset VIP Control */
 832         reg_write(vip, DVP_CTL, DVP_CTL_RST);
 833         /* Clear VIP Control */
 834         reg_write(vip, DVP_CTL, 0);
 835         /* Clean VIP Interrupt */
 836         reg_read(vip, DVP_ITS);
 837         spin_unlock_irq(&vip->slock);
 838 }
 839 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip)
 840 {
 841         int err;
 842 
 843         err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29));
 844         if (err) {
 845                 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask");
 846                 return err;
 847         }
 848         memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue));
 849         vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 850         vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ;
 851         vip->vb_vidq.drv_priv = vip;
 852         vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer);
 853         vip->vb_vidq.ops = &vip_video_qops;
 854         vip->vb_vidq.mem_ops = &vb2_dma_contig_memops;
 855         vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 856         vip->vb_vidq.dev = &vip->pdev->dev;
 857         vip->vb_vidq.lock = &vip->v4l_lock;
 858         err = vb2_queue_init(&vip->vb_vidq);
 859         if (err)
 860                 return err;
 861         INIT_LIST_HEAD(&vip->buffer_list);
 862         spin_lock_init(&vip->lock);
 863         return 0;
 864 }
 865 
 866 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip)
 867 {
 868         /*
 869          * Inititialize an empty control so VIP can inerithing controls
 870          * from ADV7180
 871          */
 872         v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0);
 873 
 874         vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl;
 875         if (vip->ctrl_hdl.error) {
 876                 int err = vip->ctrl_hdl.error;
 877 
 878                 v4l2_ctrl_handler_free(&vip->ctrl_hdl);
 879                 return err;
 880         }
 881 
 882         return 0;
 883 }
 884 
 885 /**
 886  * vip_gpio_reserve - reserve gpio pin
 887  * @dev: device
 888  * @pin: GPIO pin number
 889  * @dir: direction, input or output
 890  * @name: GPIO pin name
 891  *
 892  */
 893 static int vip_gpio_reserve(struct device *dev, int pin, int dir,
 894                             const char *name)
 895 {
 896         int ret = -ENODEV;
 897 
 898         if (!gpio_is_valid(pin))
 899                 return ret;
 900 
 901         ret = gpio_request(pin, name);
 902         if (ret) {
 903                 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name);
 904                 return ret;
 905         }
 906 
 907         ret = gpio_direction_output(pin, dir);
 908         if (ret) {
 909                 dev_err(dev, "Failed to set direction for pin %d (%s)\n",
 910                         pin, name);
 911                 gpio_free(pin);
 912                 return ret;
 913         }
 914 
 915         ret = gpio_export(pin, false);
 916         if (ret) {
 917                 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name);
 918                 gpio_free(pin);
 919                 return ret;
 920         }
 921 
 922         return 0;
 923 }
 924 
 925 /**
 926  * vip_gpio_release - release gpio pin
 927  * @dev: device
 928  * @pin: GPIO pin number
 929  * @name: GPIO pin name
 930  *
 931  */
 932 static void vip_gpio_release(struct device *dev, int pin, const char *name)
 933 {
 934         if (gpio_is_valid(pin)) {
 935                 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name);
 936                 gpio_unexport(pin);
 937                 gpio_free(pin);
 938         }
 939 }
 940 
 941 /**
 942  * sta2x11_vip_init_one - init one instance of video device
 943  * @pdev: PCI device
 944  * @ent: (not used)
 945  *
 946  * allocate reset pins for DAC.
 947  * Reset video DAC, this is done via reset line.
 948  * allocate memory for managing device
 949  * request interrupt
 950  * map IO region
 951  * register device
 952  * find and initialize video DAC
 953  *
 954  * return value: 0, no error
 955  *
 956  * -ENOMEM, no memory
 957  *
 958  * -ENODEV, device could not be detected or registered
 959  */
 960 static int sta2x11_vip_init_one(struct pci_dev *pdev,
 961                                 const struct pci_device_id *ent)
 962 {
 963         int ret;
 964         struct sta2x11_vip *vip;
 965         struct vip_config *config;
 966 
 967         /* Check if hardware support 26-bit DMA */
 968         if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) {
 969                 dev_err(&pdev->dev, "26-bit DMA addressing not available\n");
 970                 return -EINVAL;
 971         }
 972         /* Enable PCI */
 973         ret = pci_enable_device(pdev);
 974         if (ret)
 975                 return ret;
 976 
 977         /* Get VIP platform data */
 978         config = dev_get_platdata(&pdev->dev);
 979         if (!config) {
 980                 dev_info(&pdev->dev, "VIP slot disabled\n");
 981                 ret = -EINVAL;
 982                 goto disable;
 983         }
 984 
 985         /* Power configuration */
 986         ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0,
 987                                config->pwr_name);
 988         if (ret)
 989                 goto disable;
 990 
 991         ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0,
 992                                config->reset_name);
 993         if (ret) {
 994                 vip_gpio_release(&pdev->dev, config->pwr_pin,
 995                                  config->pwr_name);
 996                 goto disable;
 997         }
 998 
 999         if (gpio_is_valid(config->pwr_pin)) {
1000                 /* Datasheet says 5ms between PWR and RST */
1001                 usleep_range(5000, 25000);
1002                 gpio_direction_output(config->pwr_pin, 1);
1003         }
1004 
1005         if (gpio_is_valid(config->reset_pin)) {
1006                 /* Datasheet says 5ms between PWR and RST */
1007                 usleep_range(5000, 25000);
1008                 gpio_direction_output(config->reset_pin, 1);
1009         }
1010         usleep_range(5000, 25000);
1011 
1012         /* Allocate a new VIP instance */
1013         vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL);
1014         if (!vip) {
1015                 ret = -ENOMEM;
1016                 goto release_gpios;
1017         }
1018         vip->pdev = pdev;
1019         vip->std = V4L2_STD_PAL;
1020         vip->format = formats_50[0];
1021         vip->config = config;
1022         mutex_init(&vip->v4l_lock);
1023 
1024         ret = sta2x11_vip_init_controls(vip);
1025         if (ret)
1026                 goto free_mem;
1027         ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev);
1028         if (ret)
1029                 goto free_mem;
1030 
1031         dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n",
1032                 (unsigned long)pci_resource_start(pdev, 0),
1033                 (unsigned long)pci_resource_len(pdev, 0), pdev->irq);
1034 
1035         pci_set_master(pdev);
1036 
1037         ret = pci_request_regions(pdev, KBUILD_MODNAME);
1038         if (ret)
1039                 goto unreg;
1040 
1041         vip->iomem = pci_iomap(pdev, 0, 0x100);
1042         if (!vip->iomem) {
1043                 ret = -ENOMEM;
1044                 goto release;
1045         }
1046 
1047         pci_enable_msi(pdev);
1048 
1049         /* Initialize buffer */
1050         ret = sta2x11_vip_init_buffer(vip);
1051         if (ret)
1052                 goto unmap;
1053 
1054         spin_lock_init(&vip->slock);
1055 
1056         ret = request_irq(pdev->irq,
1057                           (irq_handler_t) vip_irq,
1058                           IRQF_SHARED, KBUILD_MODNAME, vip);
1059         if (ret) {
1060                 dev_err(&pdev->dev, "request_irq failed\n");
1061                 ret = -ENODEV;
1062                 goto release_buf;
1063         }
1064 
1065         /* Initialize and register video device */
1066         vip->video_dev = video_dev_template;
1067         vip->video_dev.v4l2_dev = &vip->v4l2_dev;
1068         vip->video_dev.queue = &vip->vb_vidq;
1069         vip->video_dev.lock = &vip->v4l_lock;
1070         video_set_drvdata(&vip->video_dev, vip);
1071 
1072         ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1);
1073         if (ret)
1074                 goto vrelease;
1075 
1076         /* Get ADV7180 subdevice */
1077         vip->adapter = i2c_get_adapter(vip->config->i2c_id);
1078         if (!vip->adapter) {
1079                 ret = -ENODEV;
1080                 dev_err(&pdev->dev, "no I2C adapter found\n");
1081                 goto vunreg;
1082         }
1083 
1084         vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter,
1085                                            "adv7180", vip->config->i2c_addr,
1086                                            NULL);
1087         if (!vip->decoder) {
1088                 ret = -ENODEV;
1089                 dev_err(&pdev->dev, "no decoder found\n");
1090                 goto vunreg;
1091         }
1092 
1093         i2c_put_adapter(vip->adapter);
1094         v4l2_subdev_call(vip->decoder, core, init, 0);
1095 
1096         sta2x11_vip_init_register(vip);
1097 
1098         dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n");
1099         return 0;
1100 
1101 vunreg:
1102         video_set_drvdata(&vip->video_dev, NULL);
1103 vrelease:
1104         video_unregister_device(&vip->video_dev);
1105         free_irq(pdev->irq, vip);
1106 release_buf:
1107         pci_disable_msi(pdev);
1108 unmap:
1109         vb2_queue_release(&vip->vb_vidq);
1110         pci_iounmap(pdev, vip->iomem);
1111 release:
1112         pci_release_regions(pdev);
1113 unreg:
1114         v4l2_device_unregister(&vip->v4l2_dev);
1115 free_mem:
1116         kfree(vip);
1117 release_gpios:
1118         vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name);
1119         vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name);
1120 disable:
1121         /*
1122          * do not call pci_disable_device on sta2x11 because it break all
1123          * other Bus masters on this EP
1124          */
1125         return ret;
1126 }
1127 
1128 /**
1129  * sta2x11_vip_remove_one - release device
1130  * @pdev: PCI device
1131  *
1132  * Undo everything done in .._init_one
1133  *
1134  * unregister video device
1135  * free interrupt
1136  * unmap ioadresses
1137  * free memory
1138  * free GPIO pins
1139  */
1140 static void sta2x11_vip_remove_one(struct pci_dev *pdev)
1141 {
1142         struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1143         struct sta2x11_vip *vip =
1144             container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1145 
1146         sta2x11_vip_clear_register(vip);
1147 
1148         video_set_drvdata(&vip->video_dev, NULL);
1149         video_unregister_device(&vip->video_dev);
1150         free_irq(pdev->irq, vip);
1151         pci_disable_msi(pdev);
1152         vb2_queue_release(&vip->vb_vidq);
1153         pci_iounmap(pdev, vip->iomem);
1154         pci_release_regions(pdev);
1155 
1156         v4l2_device_unregister(&vip->v4l2_dev);
1157 
1158         vip_gpio_release(&pdev->dev, vip->config->pwr_pin,
1159                          vip->config->pwr_name);
1160         vip_gpio_release(&pdev->dev, vip->config->reset_pin,
1161                          vip->config->reset_name);
1162 
1163         kfree(vip);
1164         /*
1165          * do not call pci_disable_device on sta2x11 because it break all
1166          * other Bus masters on this EP
1167          */
1168 }
1169 
1170 #ifdef CONFIG_PM
1171 
1172 /**
1173  * sta2x11_vip_suspend - set device into power save mode
1174  * @pdev: PCI device
1175  * @state: new state of device
1176  *
1177  * all relevant registers are saved and an attempt to set a new state is made.
1178  *
1179  * return value: 0 always indicate success,
1180  * even if device could not be disabled. (workaround for hardware problem)
1181  */
1182 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state)
1183 {
1184         struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1185         struct sta2x11_vip *vip =
1186             container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1187         unsigned long flags;
1188         int i;
1189 
1190         spin_lock_irqsave(&vip->slock, flags);
1191         vip->register_save_area[0] = reg_read(vip, DVP_CTL);
1192         reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS);
1193         vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM);
1194         reg_write(vip, DVP_ITM, 0);
1195         for (i = 1; i < SAVE_COUNT; i++)
1196                 vip->register_save_area[i] = reg_read(vip, 4 * i);
1197         for (i = 0; i < AUX_COUNT; i++)
1198                 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] =
1199                     reg_read(vip, registers_to_save[i]);
1200         spin_unlock_irqrestore(&vip->slock, flags);
1201         /* save pci state */
1202         pci_save_state(pdev);
1203         if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) {
1204                 /*
1205                  * do not call pci_disable_device on sta2x11 because it
1206                  * break all other Bus masters on this EP
1207                  */
1208                 vip->disabled = 1;
1209         }
1210 
1211         pr_info("VIP: suspend\n");
1212         return 0;
1213 }
1214 
1215 /**
1216  * sta2x11_vip_resume - resume device operation
1217  * @pdev : PCI device
1218  *
1219  * re-enable device, set PCI state to powered and restore registers.
1220  * resume normal device operation afterwards.
1221  *
1222  * return value: 0, no error.
1223  *
1224  * other, could not set device to power on state.
1225  */
1226 static int sta2x11_vip_resume(struct pci_dev *pdev)
1227 {
1228         struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1229         struct sta2x11_vip *vip =
1230             container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1231         unsigned long flags;
1232         int ret, i;
1233 
1234         pr_info("VIP: resume\n");
1235         /* restore pci state */
1236         if (vip->disabled) {
1237                 ret = pci_enable_device(pdev);
1238                 if (ret) {
1239                         pr_warn("VIP: Can't enable device.\n");
1240                         return ret;
1241                 }
1242                 vip->disabled = 0;
1243         }
1244         ret = pci_set_power_state(pdev, PCI_D0);
1245         if (ret) {
1246                 /*
1247                  * do not call pci_disable_device on sta2x11 because it
1248                  * break all other Bus masters on this EP
1249                  */
1250                 pr_warn("VIP: Can't enable device.\n");
1251                 vip->disabled = 1;
1252                 return ret;
1253         }
1254 
1255         pci_restore_state(pdev);
1256 
1257         spin_lock_irqsave(&vip->slock, flags);
1258         for (i = 1; i < SAVE_COUNT; i++)
1259                 reg_write(vip, 4 * i, vip->register_save_area[i]);
1260         for (i = 0; i < AUX_COUNT; i++)
1261                 reg_write(vip, registers_to_save[i],
1262                           vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]);
1263         reg_write(vip, DVP_CTL, vip->register_save_area[0]);
1264         reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]);
1265         spin_unlock_irqrestore(&vip->slock, flags);
1266         return 0;
1267 }
1268 
1269 #endif
1270 
1271 static const struct pci_device_id sta2x11_vip_pci_tbl[] = {
1272         {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)},
1273         {0,}
1274 };
1275 
1276 static struct pci_driver sta2x11_vip_driver = {
1277         .name = KBUILD_MODNAME,
1278         .probe = sta2x11_vip_init_one,
1279         .remove = sta2x11_vip_remove_one,
1280         .id_table = sta2x11_vip_pci_tbl,
1281 #ifdef CONFIG_PM
1282         .suspend = sta2x11_vip_suspend,
1283         .resume = sta2x11_vip_resume,
1284 #endif
1285 };
1286 
1287 static int __init sta2x11_vip_init_module(void)
1288 {
1289         return pci_register_driver(&sta2x11_vip_driver);
1290 }
1291 
1292 static void __exit sta2x11_vip_exit_module(void)
1293 {
1294         pci_unregister_driver(&sta2x11_vip_driver);
1295 }
1296 
1297 #ifdef MODULE
1298 module_init(sta2x11_vip_init_module);
1299 module_exit(sta2x11_vip_exit_module);
1300 #else
1301 late_initcall_sync(sta2x11_vip_init_module);
1302 #endif
1303 
1304 MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
1305 MODULE_AUTHOR("Wind River");
1306 MODULE_LICENSE("GPL v2");
1307 MODULE_SUPPORTED_DEVICE("sta2x11 video input");
1308 MODULE_VERSION(DRV_VERSION);
1309 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);
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root/drivers/media/pci/sta2x11/sta2x11_vip.c

DEFINITIONS
