drivers/media/video/davinci/vpif_display.c

   1 /*
   2  * vpif-display - VPIF display driver
   3  * Display driver for TI DaVinci VPIF
   4  *
   5  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation version 2.
  10  *
  11  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
  12  * kind, whether express or implied; without even the implied warranty
  13  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/module.h>
  20 #include <linux/errno.h>
  21 #include <linux/fs.h>
  22 #include <linux/mm.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/workqueue.h>
  25 #include <linux/string.h>
  26 #include <linux/videodev2.h>
  27 #include <linux/wait.h>
  28 #include <linux/time.h>
  29 #include <linux/i2c.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/io.h>
  32 #include <linux/version.h>
  33
  34 #include <asm/irq.h>
  35 #include <asm/page.h>
  36
  37 #include <media/adv7343.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-ioctl.h>
  40
  41 #include <mach/dm646x.h>
  42
  43 #include "vpif_display.h"
  44 #include "vpif.h"
  45
  46 MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
  47 MODULE_LICENSE("GPL");
  48
  49 #define DM646X_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
  50
  51 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
  52 #define vpif_dbg(level, debug, fmt, arg...)     \
  53                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
  54
  55 static int debug = 1;
  56 static u32 ch2_numbuffers = 3;
  57 static u32 ch3_numbuffers = 3;
  58 static u32 ch2_bufsize = 1920 * 1080 * 2;
  59 static u32 ch3_bufsize = 720 * 576 * 2;
  60
  61 module_param(debug, int, 0644);
  62 module_param(ch2_numbuffers, uint, S_IRUGO);
  63 module_param(ch3_numbuffers, uint, S_IRUGO);
  64 module_param(ch2_bufsize, uint, S_IRUGO);
  65 module_param(ch3_bufsize, uint, S_IRUGO);
  66
  67 MODULE_PARM_DESC(debug, "Debug level 0-1");
  68 MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)");
  69 MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)");
  70 MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)");
  71 MODULE_PARM_DESC(ch3_bufsize, "Channel3 buffer size (default:720 x 576 x 2)");
  72
  73 static struct vpif_config_params config_params = {
  74         .min_numbuffers         = 3,
  75         .numbuffers[0]          = 3,
  76         .numbuffers[1]          = 3,
  77         .min_bufsize[0]         = 720 * 480 * 2,
  78         .min_bufsize[1]         = 720 * 480 * 2,
  79         .channel_bufsize[0]     = 1920 * 1080 * 2,
  80         .channel_bufsize[1]     = 720 * 576 * 2,
  81 };
  82
  83 static struct vpif_device vpif_obj = { {NULL} };
  84 static struct device *vpif_dev;
  85
  86 static const struct vpif_channel_config_params ch_params[] = {
  87         {
  88                 "NTSC", 720, 480, 30, 0, 1, 268, 1440, 1, 23, 263, 266,
  89                 286, 525, 525, 0, 1, 0, V4L2_STD_525_60,
  90         },
  91         {
  92                 "PAL", 720, 576, 25, 0, 1, 280, 1440, 1, 23, 311, 313,
  93                 336, 624, 625, 0, 1, 0, V4L2_STD_625_50,
  94         },
  95 };
  96
  97 /*
  98  * vpif_uservirt_to_phys: This function is used to convert user
  99  * space virtual address to physical address.
 100  */
 101 static u32 vpif_uservirt_to_phys(u32 virtp)
 102 {
 103         struct mm_struct *mm = current->mm;
 104         unsigned long physp = 0;
 105         struct vm_area_struct *vma;
 106
 107         vma = find_vma(mm, virtp);
 108
 109         /* For kernel direct-mapped memory, take the easy way */
 110         if (virtp >= PAGE_OFFSET) {
 111                 physp = virt_to_phys((void *)virtp);
 112         } else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) {
 113                 /* this will catch, kernel-allocated, mmaped-to-usermode addr */
 114                 physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
 115         } else {
 116                 /* otherwise, use get_user_pages() for general userland pages */
 117                 int res, nr_pages = 1;
 118                 struct page *pages;
 119                 down_read(&current->mm->mmap_sem);
 120
 121                 res = get_user_pages(current, current->mm,
 122                                      virtp, nr_pages, 1, 0, &pages, NULL);
 123                 up_read(&current->mm->mmap_sem);
 124
 125                 if (res == nr_pages) {
 126                         physp = __pa(page_address(&pages[0]) +
 127                                                         (virtp & ~PAGE_MASK));
 128                 } else {
 129                         vpif_err("get_user_pages failed\n");
 130                         return 0;
 131                 }
 132         }
 133
 134         return physp;
 135 }
 136
 137 /*
 138  * buffer_prepare: This is the callback function called from videobuf_qbuf()
 139  * function the buffer is prepared and user space virtual address is converted
 140  * into physical address
 141  */
 142 static int vpif_buffer_prepare(struct videobuf_queue *q,
 143                                struct videobuf_buffer *vb,
 144                                enum v4l2_field field)
 145 {
 146         struct vpif_fh *fh = q->priv_data;
 147         struct common_obj *common;
 148         unsigned long addr;
 149
 150         common = &fh->channel->common[VPIF_VIDEO_INDEX];
 151         if (VIDEOBUF_NEEDS_INIT == vb->state) {
 152                 vb->width       = common->width;
 153                 vb->height      = common->height;
 154                 vb->size        = vb->width * vb->height;
 155                 vb->field       = field;
 156         }
 157         vb->state = VIDEOBUF_PREPARED;
 158
 159         /* if user pointer memory mechanism is used, get the physical
 160          * address of the buffer */
 161         if (V4L2_MEMORY_USERPTR == common->memory) {
 162                 if (!vb->baddr) {
 163                         vpif_err("buffer_address is 0\n");
 164                         return -EINVAL;
 165                 }
 166
 167                 vb->boff = vpif_uservirt_to_phys(vb->baddr);
 168                 if (!ISALIGNED(vb->boff))
 169                         goto buf_align_exit;
 170         }
 171
 172         addr = vb->boff;
 173         if (q->streaming && (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) {
 174                 if (!ISALIGNED(addr + common->ytop_off) ||
 175                     !ISALIGNED(addr + common->ybtm_off) ||
 176                     !ISALIGNED(addr + common->ctop_off) ||
 177                     !ISALIGNED(addr + common->cbtm_off))
 178                         goto buf_align_exit;
 179         }
 180         return 0;
 181
 182 buf_align_exit:
 183         vpif_err("buffer offset not aligned to 8 bytes\n");
 184         return -EINVAL;
 185 }
 186
 187 /*
 188  * vpif_buffer_setup: This function allocates memory for the buffers
 189  */
 190 static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count,
 191                                 unsigned int *size)
 192 {
 193         struct vpif_fh *fh = q->priv_data;
 194         struct channel_obj *ch = fh->channel;
 195         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 196
 197         if (V4L2_MEMORY_MMAP != common->memory)
 198                 return 0;
 199
 200         *size = config_params.channel_bufsize[ch->channel_id];
 201         if (*count < config_params.min_numbuffers)
 202                 *count = config_params.min_numbuffers;
 203
 204         return 0;
 205 }
 206
 207 /*
 208  * vpif_buffer_queue: This function adds the buffer to DMA queue
 209  */
 210 static void vpif_buffer_queue(struct videobuf_queue *q,
 211                               struct videobuf_buffer *vb)
 212 {
 213         struct vpif_fh *fh = q->priv_data;
 214         struct common_obj *common;
 215
 216         common = &fh->channel->common[VPIF_VIDEO_INDEX];
 217
 218         /* add the buffer to the DMA queue */
 219         list_add_tail(&vb->queue, &common->dma_queue);
 220         vb->state = VIDEOBUF_QUEUED;
 221 }
 222
 223 /*
 224  * vpif_buffer_release: This function is called from the videobuf layer to
 225  * free memory allocated to the buffers
 226  */
 227 static void vpif_buffer_release(struct videobuf_queue *q,
 228                                 struct videobuf_buffer *vb)
 229 {
 230         struct vpif_fh *fh = q->priv_data;
 231         struct channel_obj *ch = fh->channel;
 232         struct common_obj *common;
 233         unsigned int buf_size = 0;
 234
 235         common = &ch->common[VPIF_VIDEO_INDEX];
 236
 237         videobuf_dma_contig_free(q, vb);
 238         vb->state = VIDEOBUF_NEEDS_INIT;
 239
 240         if (V4L2_MEMORY_MMAP != common->memory)
 241                 return;
 242
 243         buf_size = config_params.channel_bufsize[ch->channel_id];
 244 }
 245
 246 static struct videobuf_queue_ops video_qops = {
 247         .buf_setup      = vpif_buffer_setup,
 248         .buf_prepare    = vpif_buffer_prepare,
 249         .buf_queue      = vpif_buffer_queue,
 250         .buf_release    = vpif_buffer_release,
 251 };
 252 static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
 253
 254 static void process_progressive_mode(struct common_obj *common)
 255 {
 256         unsigned long addr = 0;
 257
 258         /* Get the next buffer from buffer queue */
 259         common->next_frm = list_entry(common->dma_queue.next,
 260                                 struct videobuf_buffer, queue);
 261         /* Remove that buffer from the buffer queue */
 262         list_del(&common->next_frm->queue);
 263         /* Mark status of the buffer as active */
 264         common->next_frm->state = VIDEOBUF_ACTIVE;
 265
 266         /* Set top and bottom field addrs in VPIF registers */
 267         addr = videobuf_to_dma_contig(common->next_frm);
 268         common->set_addr(addr + common->ytop_off,
 269                                  addr + common->ybtm_off,
 270                                  addr + common->ctop_off,
 271                                  addr + common->cbtm_off);
 272 }
 273
 274 static void process_interlaced_mode(int fid, struct common_obj *common)
 275 {
 276         /* device field id and local field id are in sync */
 277         /* If this is even field */
 278         if (0 == fid) {
 279                 if (common->cur_frm == common->next_frm)
 280                         return;
 281
 282                 /* one frame is displayed If next frame is
 283                  *  available, release cur_frm and move on */
 284                 /* Copy frame display time */
 285                 do_gettimeofday(&common->cur_frm->ts);
 286                 /* Change status of the cur_frm */
 287                 common->cur_frm->state = VIDEOBUF_DONE;
 288                 /* unlock semaphore on cur_frm */
 289                 wake_up_interruptible(&common->cur_frm->done);
 290                 /* Make cur_frm pointing to next_frm */
 291                 common->cur_frm = common->next_frm;
 292
 293         } else if (1 == fid) {  /* odd field */
 294                 if (list_empty(&common->dma_queue)
 295                     || (common->cur_frm != common->next_frm)) {
 296                         return;
 297                 }
 298                 /* one field is displayed configure the next
 299                  * frame if it is available else hold on current
 300                  * frame */
 301                 /* Get next from the buffer queue */
 302                 process_progressive_mode(common);
 303
 304         }
 305 }
 306
 307 /*
 308  * vpif_channel_isr: It changes status of the displayed buffer, takes next
 309  * buffer from the queue and sets its address in VPIF registers
 310  */
 311 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
 312 {
 313         struct vpif_device *dev = &vpif_obj;
 314         struct channel_obj *ch;
 315         struct common_obj *common;
 316         enum v4l2_field field;
 317         int fid = -1, i;
 318         int channel_id = 0;
 319
 320         channel_id = *(int *)(dev_id);
 321         ch = dev->dev[channel_id];
 322         field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
 323         for (i = 0; i < VPIF_NUMOBJECTS; i++) {
 324                 common = &ch->common[i];
 325                 /* If streaming is started in this channel */
 326                 if (0 == common->started)
 327                         continue;
 328
 329                 if (1 == ch->vpifparams.std_info.frm_fmt) {
 330                         if (list_empty(&common->dma_queue))
 331                                 continue;
 332
 333                         /* Progressive mode */
 334                         if (!channel_first_int[i][channel_id]) {
 335                                 /* Mark status of the cur_frm to
 336                                  * done and unlock semaphore on it */
 337                                 do_gettimeofday(&common->cur_frm->ts);
 338                                 common->cur_frm->state = VIDEOBUF_DONE;
 339                                 wake_up_interruptible(&common->cur_frm->done);
 340                                 /* Make cur_frm pointing to next_frm */
 341                                 common->cur_frm = common->next_frm;
 342                         }
 343
 344                         channel_first_int[i][channel_id] = 0;
 345                         process_progressive_mode(common);
 346                 } else {
 347                         /* Interlaced mode */
 348                         /* If it is first interrupt, ignore it */
 349
 350                         if (channel_first_int[i][channel_id]) {
 351                                 channel_first_int[i][channel_id] = 0;
 352                                 continue;
 353                         }
 354
 355                         if (0 == i) {
 356                                 ch->field_id ^= 1;
 357                                 /* Get field id from VPIF registers */
 358                                 fid = vpif_channel_getfid(ch->channel_id + 2);
 359                                 /* If fid does not match with stored field id */
 360                                 if (fid != ch->field_id) {
 361                                         /* Make them in sync */
 362                                         if (0 == fid)
 363                                                 ch->field_id = fid;
 364
 365                                         return IRQ_HANDLED;
 366                                 }
 367                         }
 368                         process_interlaced_mode(fid, common);
 369                 }
 370         }
 371
 372         return IRQ_HANDLED;
 373 }
 374
 375 static int vpif_get_std_info(struct channel_obj *ch)
 376 {
 377         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 378         struct video_obj *vid_ch = &ch->video;
 379         struct vpif_params *vpifparams = &ch->vpifparams;
 380         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
 381         const struct vpif_channel_config_params *config;
 382
 383         int index;
 384
 385         std_info->stdid = vid_ch->stdid;
 386         if (!std_info)
 387                 return -1;
 388
 389         for (index = 0; index < ARRAY_SIZE(ch_params); index++) {
 390                 config = &ch_params[index];
 391                 if (config->stdid & std_info->stdid) {
 392                         memcpy(std_info, config, sizeof(*config));
 393                         break;
 394                 }
 395         }
 396
 397         if (index == ARRAY_SIZE(ch_params))
 398                 return -1;
 399
 400         common->fmt.fmt.pix.width = std_info->width;
 401         common->fmt.fmt.pix.height = std_info->height;
 402         vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
 403                         common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
 404
 405         /* Set height and width paramateres */
 406         ch->common[VPIF_VIDEO_INDEX].height = std_info->height;
 407         ch->common[VPIF_VIDEO_INDEX].width = std_info->width;
 408
 409         return 0;
 410 }
 411
 412 /*
 413  * vpif_calculate_offsets: This function calculates buffers offset for Y and C
 414  * in the top and bottom field
 415  */
 416 static void vpif_calculate_offsets(struct channel_obj *ch)
 417 {
 418         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 419         struct vpif_params *vpifparams = &ch->vpifparams;
 420         enum v4l2_field field = common->fmt.fmt.pix.field;
 421         struct video_obj *vid_ch = &ch->video;
 422         unsigned int hpitch, vpitch, sizeimage;
 423
 424         if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
 425                 if (ch->vpifparams.std_info.frm_fmt)
 426                         vid_ch->buf_field = V4L2_FIELD_NONE;
 427                 else
 428                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
 429         } else {
 430                 vid_ch->buf_field = common->fmt.fmt.pix.field;
 431         }
 432
 433         if (V4L2_MEMORY_USERPTR == common->memory)
 434                 sizeimage = common->fmt.fmt.pix.sizeimage;
 435         else
 436                 sizeimage = config_params.channel_bufsize[ch->channel_id];
 437
 438         hpitch = common->fmt.fmt.pix.bytesperline;
 439         vpitch = sizeimage / (hpitch * 2);
 440         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 441             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 442                 common->ytop_off = 0;
 443                 common->ybtm_off = hpitch;
 444                 common->ctop_off = sizeimage / 2;
 445                 common->cbtm_off = sizeimage / 2 + hpitch;
 446         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
 447                 common->ytop_off = 0;
 448                 common->ybtm_off = sizeimage / 4;
 449                 common->ctop_off = sizeimage / 2;
 450                 common->cbtm_off = common->ctop_off + sizeimage / 4;
 451         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
 452                 common->ybtm_off = 0;
 453                 common->ytop_off = sizeimage / 4;
 454                 common->cbtm_off = sizeimage / 2;
 455                 common->ctop_off = common->cbtm_off + sizeimage / 4;
 456         }
 457
 458         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
 459             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
 460                 vpifparams->video_params.storage_mode = 1;
 461         } else {
 462                 vpifparams->video_params.storage_mode = 0;
 463         }
 464
 465         if (ch->vpifparams.std_info.frm_fmt == 1) {
 466                 vpifparams->video_params.hpitch =
 467                     common->fmt.fmt.pix.bytesperline;
 468         } else {
 469                 if ((field == V4L2_FIELD_ANY) ||
 470                         (field == V4L2_FIELD_INTERLACED))
 471                         vpifparams->video_params.hpitch =
 472                             common->fmt.fmt.pix.bytesperline * 2;
 473                 else
 474                         vpifparams->video_params.hpitch =
 475                             common->fmt.fmt.pix.bytesperline;
 476         }
 477
 478         ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid;
 479 }
 480
 481 static void vpif_config_format(struct channel_obj *ch)
 482 {
 483         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 484
 485         common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
 486         if (config_params.numbuffers[ch->channel_id] == 0)
 487                 common->memory = V4L2_MEMORY_USERPTR;
 488         else
 489                 common->memory = V4L2_MEMORY_MMAP;
 490
 491         common->fmt.fmt.pix.sizeimage =
 492                         config_params.channel_bufsize[ch->channel_id];
 493         common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
 494         common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 495 }
 496
 497 static int vpif_check_format(struct channel_obj *ch,
 498                              struct v4l2_pix_format *pixfmt)
 499 {
 500         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 501         enum v4l2_field field = pixfmt->field;
 502         u32 sizeimage, hpitch, vpitch;
 503
 504         if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
 505                 goto invalid_fmt_exit;
 506
 507         if (!(VPIF_VALID_FIELD(field)))
 508                 goto invalid_fmt_exit;
 509
 510         if (pixfmt->bytesperline <= 0)
 511                 goto invalid_pitch_exit;
 512
 513         if (V4L2_MEMORY_USERPTR == common->memory)
 514                 sizeimage = pixfmt->sizeimage;
 515         else
 516                 sizeimage = config_params.channel_bufsize[ch->channel_id];
 517
 518         if (vpif_get_std_info(ch)) {
 519                 vpif_err("Error getting the standard info\n");
 520                 return -EINVAL;
 521         }
 522
 523         hpitch = pixfmt->bytesperline;
 524         vpitch = sizeimage / (hpitch * 2);
 525
 526         /* Check for valid value of pitch */
 527         if ((hpitch < ch->vpifparams.std_info.width) ||
 528             (vpitch < ch->vpifparams.std_info.height))
 529                 goto invalid_pitch_exit;
 530
 531         /* Check for 8 byte alignment */
 532         if (!ISALIGNED(hpitch)) {
 533                 vpif_err("invalid pitch alignment\n");
 534                 return -EINVAL;
 535         }
 536         pixfmt->width = common->fmt.fmt.pix.width;
 537         pixfmt->height = common->fmt.fmt.pix.height;
 538
 539         return 0;
 540
 541 invalid_fmt_exit:
 542         vpif_err("invalid field format\n");
 543         return -EINVAL;
 544
 545 invalid_pitch_exit:
 546         vpif_err("invalid pitch\n");
 547         return -EINVAL;
 548 }
 549
 550 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
 551 {
 552         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 553
 554         if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
 555                 common->set_addr = ch3_set_videobuf_addr;
 556         } else {
 557                 if (2 == muxmode)
 558                         common->set_addr = ch2_set_videobuf_addr_yc_nmux;
 559                 else
 560                         common->set_addr = ch2_set_videobuf_addr;
 561         }
 562 }
 563
 564 /*
 565  * vpif_mmap: It is used to map kernel space buffers into user spaces
 566  */
 567 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
 568 {
 569         struct vpif_fh *fh = filep->private_data;
 570         struct common_obj *common = &fh->channel->common[VPIF_VIDEO_INDEX];
 571
 572         return videobuf_mmap_mapper(&common->buffer_queue, vma);
 573 }
 574
 575 /*
 576  * vpif_poll: It is used for select/poll system call
 577  */
 578 static unsigned int vpif_poll(struct file *filep, poll_table *wait)
 579 {
 580         struct vpif_fh *fh = filep->private_data;
 581         struct channel_obj *ch = fh->channel;
 582         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 583
 584         if (common->started)
 585                 return videobuf_poll_stream(filep, &common->buffer_queue, wait);
 586
 587         return 0;
 588 }
 589
 590 /*
 591  * vpif_open: It creates object of file handle structure and stores it in
 592  * private_data member of filepointer
 593  */
 594 static int vpif_open(struct file *filep)
 595 {
 596         struct video_device *vdev = video_devdata(filep);
 597         struct channel_obj *ch = NULL;
 598         struct vpif_fh *fh = NULL;
 599
 600         ch = video_get_drvdata(vdev);
 601         /* Allocate memory for the file handle object */
 602         fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL);
 603         if (fh == NULL) {
 604                 vpif_err("unable to allocate memory for file handle object\n");
 605                 return -ENOMEM;
 606         }
 607
 608         /* store pointer to fh in private_data member of filep */
 609         filep->private_data = fh;
 610         fh->channel = ch;
 611         fh->initialized = 0;
 612         if (!ch->initialized) {
 613                 fh->initialized = 1;
 614                 ch->initialized = 1;
 615                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
 616         }
 617
 618         /* Increment channel usrs counter */
 619         atomic_inc(&ch->usrs);
 620         /* Set io_allowed[VPIF_VIDEO_INDEX] member to false */
 621         fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
 622         /* Initialize priority of this instance to default priority */
 623         fh->prio = V4L2_PRIORITY_UNSET;
 624         v4l2_prio_open(&ch->prio, &fh->prio);
 625
 626         return 0;
 627 }
 628
 629 /*
 630  * vpif_release: This function deletes buffer queue, frees the buffers and
 631  * the vpif file handle
 632  */
 633 static int vpif_release(struct file *filep)
 634 {
 635         struct vpif_fh *fh = filep->private_data;
 636         struct channel_obj *ch = fh->channel;
 637         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 638
 639         if (mutex_lock_interruptible(&common->lock))
 640                 return -ERESTARTSYS;
 641
 642         /* if this instance is doing IO */
 643         if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
 644                 /* Reset io_usrs member of channel object */
 645                 common->io_usrs = 0;
 646                 /* Disable channel */
 647                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
 648                         enable_channel2(0);
 649                         channel2_intr_enable(0);
 650                 }
 651                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
 652                     (2 == common->started)) {
 653                         enable_channel3(0);
 654                         channel3_intr_enable(0);
 655                 }
 656                 common->started = 0;
 657                 /* Free buffers allocated */
 658                 videobuf_queue_cancel(&common->buffer_queue);
 659                 videobuf_mmap_free(&common->buffer_queue);
 660                 common->numbuffers =
 661                     config_params.numbuffers[ch->channel_id];
 662         }
 663
 664         mutex_unlock(&common->lock);
 665
 666         /* Decrement channel usrs counter */
 667         atomic_dec(&ch->usrs);
 668         /* If this file handle has initialize encoder device, reset it */
 669         if (fh->initialized)
 670                 ch->initialized = 0;
 671
 672         /* Close the priority */
 673         v4l2_prio_close(&ch->prio, &fh->prio);
 674         filep->private_data = NULL;
 675         fh->initialized = 0;
 676         kfree(fh);
 677
 678         return 0;
 679 }
 680
 681 /* functions implementing ioctls */
 682
 683 static int vpif_querycap(struct file *file, void  *priv,
 684                                 struct v4l2_capability *cap)
 685 {
 686         struct vpif_display_config *config = vpif_dev->platform_data;
 687
 688         cap->version = VPIF_DISPLAY_VERSION_CODE;
 689         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 690         strlcpy(cap->driver, "vpif display", sizeof(cap->driver));
 691         strlcpy(cap->bus_info, "Platform", sizeof(cap->bus_info));
 692         strlcpy(cap->card, config->card_name, sizeof(cap->card));
 693
 694         return 0;
 695 }
 696
 697 static int vpif_enum_fmt_vid_out(struct file *file, void  *priv,
 698                                         struct v4l2_fmtdesc *fmt)
 699 {
 700         if (fmt->index != 0) {
 701                 vpif_err("Invalid format index\n");
 702                 return -EINVAL;
 703         }
 704
 705         /* Fill in the information about format */
 706         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 707         strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
 708         fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
 709
 710         return 0;
 711 }
 712
 713 static int vpif_g_fmt_vid_out(struct file *file, void *priv,
 714                                 struct v4l2_format *fmt)
 715 {
 716         struct vpif_fh *fh = priv;
 717         struct channel_obj *ch = fh->channel;
 718         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 719
 720         /* Check the validity of the buffer type */
 721         if (common->fmt.type != fmt->type)
 722                 return -EINVAL;
 723
 724         /* Fill in the information about format */
 725         if (mutex_lock_interruptible(&common->lock))
 726                 return -ERESTARTSYS;
 727
 728         if (vpif_get_std_info(ch)) {
 729                 vpif_err("Error getting the standard info\n");
 730                 return -EINVAL;
 731         }
 732
 733         *fmt = common->fmt;
 734         mutex_unlock(&common->lock);
 735         return 0;
 736 }
 737
 738 static int vpif_s_fmt_vid_out(struct file *file, void *priv,
 739                                 struct v4l2_format *fmt)
 740 {
 741         struct vpif_fh *fh = priv;
 742         struct v4l2_pix_format *pixfmt;
 743         struct channel_obj *ch = fh->channel;
 744         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 745         int ret = 0;
 746
 747         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 748             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 749                 if (!fh->initialized) {
 750                         vpif_dbg(1, debug, "Channel Busy\n");
 751                         return -EBUSY;
 752                 }
 753
 754                 /* Check for the priority */
 755                 ret = v4l2_prio_check(&ch->prio, &fh->prio);
 756                 if (0 != ret)
 757                         return ret;
 758                 fh->initialized = 1;
 759         }
 760
 761         if (common->started) {
 762                 vpif_dbg(1, debug, "Streaming in progress\n");
 763                 return -EBUSY;
 764         }
 765
 766         pixfmt = &fmt->fmt.pix;
 767         /* Check for valid field format */
 768         ret = vpif_check_format(ch, pixfmt);
 769         if (ret)
 770                 return ret;
 771
 772         /* store the pix format in the channel object */
 773         common->fmt.fmt.pix = *pixfmt;
 774         /* store the format in the channel object */
 775         if (mutex_lock_interruptible(&common->lock))
 776                 return -ERESTARTSYS;
 777
 778         common->fmt = *fmt;
 779         mutex_unlock(&common->lock);
 780
 781         return 0;
 782 }
 783
 784 static int vpif_try_fmt_vid_out(struct file *file, void *priv,
 785                                 struct v4l2_format *fmt)
 786 {
 787         struct vpif_fh *fh = priv;
 788         struct channel_obj *ch = fh->channel;
 789         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 790         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 791         int ret = 0;
 792
 793         ret = vpif_check_format(ch, pixfmt);
 794         if (ret) {
 795                 *pixfmt = common->fmt.fmt.pix;
 796                 pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2;
 797         }
 798
 799         return ret;
 800 }
 801
 802 static int vpif_reqbufs(struct file *file, void *priv,
 803                         struct v4l2_requestbuffers *reqbuf)
 804 {
 805         struct vpif_fh *fh = priv;
 806         struct channel_obj *ch = fh->channel;
 807         struct common_obj *common;
 808         enum v4l2_field field;
 809         u8 index = 0;
 810         int ret = 0;
 811
 812         /* This file handle has not initialized the channel,
 813            It is not allowed to do settings */
 814         if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
 815             || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
 816                 if (!fh->initialized) {
 817                         vpif_err("Channel Busy\n");
 818                         return -EBUSY;
 819                 }
 820         }
 821
 822         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type)
 823                 return -EINVAL;
 824
 825         index = VPIF_VIDEO_INDEX;
 826
 827         common = &ch->common[index];
 828         if (mutex_lock_interruptible(&common->lock))
 829                 return -ERESTARTSYS;
 830
 831         if (common->fmt.type != reqbuf->type) {
 832                 ret = -EINVAL;
 833                 goto reqbuf_exit;
 834         }
 835
 836         if (0 != common->io_usrs) {
 837                 ret = -EBUSY;
 838                 goto reqbuf_exit;
 839         }
 840
 841         if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 842                 if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY)
 843                         field = V4L2_FIELD_INTERLACED;
 844                 else
 845                         field = common->fmt.fmt.pix.field;
 846         } else {
 847                 field = V4L2_VBI_INTERLACED;
 848         }
 849
 850         /* Initialize videobuf queue as per the buffer type */
 851         videobuf_queue_dma_contig_init(&common->buffer_queue,
 852                                             &video_qops, NULL,
 853                                             &common->irqlock,
 854                                             reqbuf->type, field,
 855                                             sizeof(struct videobuf_buffer), fh);
 856
 857         /* Set io allowed member of file handle to TRUE */
 858         fh->io_allowed[index] = 1;
 859         /* Increment io usrs member of channel object to 1 */
 860         common->io_usrs = 1;
 861         /* Store type of memory requested in channel object */
 862         common->memory = reqbuf->memory;
 863         INIT_LIST_HEAD(&common->dma_queue);
 864
 865         /* Allocate buffers */
 866         ret = videobuf_reqbufs(&common->buffer_queue, reqbuf);
 867
 868 reqbuf_exit:
 869         mutex_unlock(&common->lock);
 870         return ret;
 871 }
 872
 873 static int vpif_querybuf(struct file *file, void *priv,
 874                                 struct v4l2_buffer *tbuf)
 875 {
 876         struct vpif_fh *fh = priv;
 877         struct channel_obj *ch = fh->channel;
 878         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 879
 880         if (common->fmt.type != tbuf->type)
 881                 return -EINVAL;
 882
 883         return videobuf_querybuf(&common->buffer_queue, tbuf);
 884 }
 885
 886 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 887 {
 888
 889         struct vpif_fh *fh = priv;
 890         struct channel_obj *ch = fh->channel;
 891         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 892         struct v4l2_buffer tbuf = *buf;
 893         struct videobuf_buffer *buf1;
 894         unsigned long addr = 0;
 895         unsigned long flags;
 896         int ret = 0;
 897
 898         if (common->fmt.type != tbuf.type)
 899                 return -EINVAL;
 900
 901         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
 902                 vpif_err("fh->io_allowed\n");
 903                 return -EACCES;
 904         }
 905
 906         if (!(list_empty(&common->dma_queue)) ||
 907             (common->cur_frm != common->next_frm) ||
 908             !(common->started) ||
 909             (common->started && (0 == ch->field_id)))
 910                 return videobuf_qbuf(&common->buffer_queue, buf);
 911
 912         /* bufferqueue is empty store buffer address in VPIF registers */
 913         mutex_lock(&common->buffer_queue.vb_lock);
 914         buf1 = common->buffer_queue.bufs[tbuf.index];
 915         if (buf1->memory != tbuf.memory) {
 916                 vpif_err("invalid buffer type\n");
 917                 goto qbuf_exit;
 918         }
 919
 920         if ((buf1->state == VIDEOBUF_QUEUED) ||
 921             (buf1->state == VIDEOBUF_ACTIVE)) {
 922                 vpif_err("invalid state\n");
 923                 goto qbuf_exit;
 924         }
 925
 926         switch (buf1->memory) {
 927         case V4L2_MEMORY_MMAP:
 928                 if (buf1->baddr == 0)
 929                         goto qbuf_exit;
 930                 break;
 931
 932         case V4L2_MEMORY_USERPTR:
 933                 if (tbuf.length < buf1->bsize)
 934                         goto qbuf_exit;
 935
 936                 if ((VIDEOBUF_NEEDS_INIT != buf1->state)
 937                             && (buf1->baddr != tbuf.m.userptr))
 938                         vpif_buffer_release(&common->buffer_queue, buf1);
 939                         buf1->baddr = tbuf.m.userptr;
 940                 break;
 941
 942         default:
 943                 goto qbuf_exit;
 944         }
 945
 946         local_irq_save(flags);
 947         ret = vpif_buffer_prepare(&common->buffer_queue, buf1,
 948                                         common->buffer_queue.field);
 949         if (ret < 0) {
 950                 local_irq_restore(flags);
 951                 goto qbuf_exit;
 952         }
 953
 954         buf1->state = VIDEOBUF_ACTIVE;
 955         addr = buf1->boff;
 956         common->next_frm = buf1;
 957         if (tbuf.type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) {
 958                 common->set_addr((addr + common->ytop_off),
 959                                  (addr + common->ybtm_off),
 960                                  (addr + common->ctop_off),
 961                                  (addr + common->cbtm_off));
 962         }
 963
 964         local_irq_restore(flags);
 965         list_add_tail(&buf1->stream, &common->buffer_queue.stream);
 966         mutex_unlock(&common->buffer_queue.vb_lock);
 967         return 0;
 968
 969 qbuf_exit:
 970         mutex_unlock(&common->buffer_queue.vb_lock);
 971         return -EINVAL;
 972 }
 973
 974 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
 975 {
 976         struct vpif_fh *fh = priv;
 977         struct channel_obj *ch = fh->channel;
 978         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 979         int ret = 0;
 980
 981         if (!(*std_id & DM646X_V4L2_STD))
 982                 return -EINVAL;
 983
 984         if (common->started) {
 985                 vpif_err("streaming in progress\n");
 986                 return -EBUSY;
 987         }
 988
 989         /* Call encoder subdevice function to set the standard */
 990         if (mutex_lock_interruptible(&common->lock))
 991                 return -ERESTARTSYS;
 992
 993         ch->video.stdid = *std_id;
 994         /* Get the information about the standard */
 995         if (vpif_get_std_info(ch)) {
 996                 vpif_err("Error getting the standard info\n");
 997                 return -EINVAL;
 998         }
 999
1000         if ((ch->vpifparams.std_info.width *
1001                 ch->vpifparams.std_info.height * 2) >
1002                 config_params.channel_bufsize[ch->channel_id]) {
1003                 vpif_err("invalid std for this size\n");
1004                 ret = -EINVAL;
1005                 goto s_std_exit;
1006         }
1007
1008         common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
1009         /* Configure the default format information */
1010         vpif_config_format(ch);
1011
1012         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1013                                                 s_std_output, *std_id);
1014         if (ret < 0) {
1015                 vpif_err("Failed to set output standard\n");
1016                 goto s_std_exit;
1017         }
1018
1019         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
1020                                                         s_std, *std_id);
1021         if (ret < 0)
1022                 vpif_err("Failed to set standard for sub devices\n");
1023
1024 s_std_exit:
1025         mutex_unlock(&common->lock);
1026         return ret;
1027 }
1028
1029 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1030 {
1031         struct vpif_fh *fh = priv;
1032         struct channel_obj *ch = fh->channel;
1033
1034         *std = ch->video.stdid;
1035         return 0;
1036 }
1037
1038 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
1039 {
1040         struct vpif_fh *fh = priv;
1041         struct channel_obj *ch = fh->channel;
1042         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1043
1044         return videobuf_dqbuf(&common->buffer_queue, p,
1045                                         (file->f_flags & O_NONBLOCK));
1046 }
1047
1048 static int vpif_streamon(struct file *file, void *priv,
1049                                 enum v4l2_buf_type buftype)
1050 {
1051         struct vpif_fh *fh = priv;
1052         struct channel_obj *ch = fh->channel;
1053         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1054         struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1055         struct vpif_params *vpif = &ch->vpifparams;
1056         struct vpif_display_config *vpif_config_data =
1057                                         vpif_dev->platform_data;
1058         unsigned long addr = 0;
1059         int ret = 0;
1060
1061         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1062                 vpif_err("buffer type not supported\n");
1063                 return -EINVAL;
1064         }
1065
1066         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1067                 vpif_err("fh->io_allowed\n");
1068                 return -EACCES;
1069         }
1070
1071         /* If Streaming is already started, return error */
1072         if (common->started) {
1073                 vpif_err("channel->started\n");
1074                 return -EBUSY;
1075         }
1076
1077         if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
1078                 && oth_ch->common[VPIF_VIDEO_INDEX].started &&
1079                 ch->vpifparams.std_info.ycmux_mode == 0)
1080                 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
1081                 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1082                 vpif_err("other channel is using\n");
1083                 return -EBUSY;
1084         }
1085
1086         ret = vpif_check_format(ch, &common->fmt.fmt.pix);
1087         if (ret < 0)
1088                 return ret;
1089
1090         /* Call videobuf_streamon to start streaming  in videobuf */
1091         ret = videobuf_streamon(&common->buffer_queue);
1092         if (ret < 0) {
1093                 vpif_err("videobuf_streamon\n");
1094                 return ret;
1095         }
1096
1097         if (mutex_lock_interruptible(&common->lock))
1098                 return -ERESTARTSYS;
1099
1100         /* If buffer queue is empty, return error */
1101         if (list_empty(&common->dma_queue)) {
1102                 vpif_err("buffer queue is empty\n");
1103                 ret = -EIO;
1104                 goto streamon_exit;
1105         }
1106
1107         /* Get the next frame from the buffer queue */
1108         common->next_frm = common->cur_frm =
1109                             list_entry(common->dma_queue.next,
1110                                        struct videobuf_buffer, queue);
1111
1112         list_del(&common->cur_frm->queue);
1113         /* Mark state of the current frame to active */
1114         common->cur_frm->state = VIDEOBUF_ACTIVE;
1115
1116         /* Initialize field_id and started member */
1117         ch->field_id = 0;
1118         common->started = 1;
1119         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1120                 addr = common->cur_frm->boff;
1121                 /* Calculate the offset for Y and C data  in the buffer */
1122                 vpif_calculate_offsets(ch);
1123
1124                 if ((ch->vpifparams.std_info.frm_fmt &&
1125                         ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE)
1126                         && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY)))
1127                         || (!ch->vpifparams.std_info.frm_fmt
1128                         && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
1129                         vpif_err("conflict in field format and std format\n");
1130                         ret = -EINVAL;
1131                         goto streamon_exit;
1132                 }
1133
1134                 /* clock settings */
1135                 ret =
1136                  vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode,
1137                                                 ch->vpifparams.std_info.hd_sd);
1138                 if (ret < 0) {
1139                         vpif_err("can't set clock\n");
1140                         goto streamon_exit;
1141                 }
1142
1143                 /* set the parameters and addresses */
1144                 ret = vpif_set_video_params(vpif, ch->channel_id + 2);
1145                 if (ret < 0)
1146                         goto streamon_exit;
1147
1148                 common->started = ret;
1149                 vpif_config_addr(ch, ret);
1150                 common->set_addr((addr + common->ytop_off),
1151                                  (addr + common->ybtm_off),
1152                                  (addr + common->ctop_off),
1153                                  (addr + common->cbtm_off));
1154
1155                 /* Set interrupt for both the fields in VPIF
1156                    Register enable channel in VPIF register */
1157                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1158                         channel2_intr_assert();
1159                         channel2_intr_enable(1);
1160                         enable_channel2(1);
1161                 }
1162
1163                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
1164                         || (common->started == 2)) {
1165                         channel3_intr_assert();
1166                         channel3_intr_enable(1);
1167                         enable_channel3(1);
1168                 }
1169                 channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
1170         }
1171
1172 streamon_exit:
1173         mutex_unlock(&common->lock);
1174         return ret;
1175 }
1176
1177 static int vpif_streamoff(struct file *file, void *priv,
1178                                 enum v4l2_buf_type buftype)
1179 {
1180         struct vpif_fh *fh = priv;
1181         struct channel_obj *ch = fh->channel;
1182         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1183
1184         if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1185                 vpif_err("buffer type not supported\n");
1186                 return -EINVAL;
1187         }
1188
1189         if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1190                 vpif_err("fh->io_allowed\n");
1191                 return -EACCES;
1192         }
1193
1194         if (!common->started) {
1195                 vpif_err("channel->started\n");
1196                 return -EINVAL;
1197         }
1198
1199         if (mutex_lock_interruptible(&common->lock))
1200                 return -ERESTARTSYS;
1201
1202         if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1203                 /* disable channel */
1204                 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
1205                         enable_channel2(0);
1206                         channel2_intr_enable(0);
1207                 }
1208                 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
1209                                         (2 == common->started)) {
1210                         enable_channel3(0);
1211                         channel3_intr_enable(0);
1212                 }
1213         }
1214
1215         common->started = 0;
1216         mutex_unlock(&common->lock);
1217
1218         return videobuf_streamoff(&common->buffer_queue);
1219 }
1220
1221 static int vpif_cropcap(struct file *file, void *priv,
1222                         struct v4l2_cropcap *crop)
1223 {
1224         struct vpif_fh *fh = priv;
1225         struct channel_obj *ch = fh->channel;
1226         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1227         if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type)
1228                 return -EINVAL;
1229
1230         crop->bounds.left = crop->bounds.top = 0;
1231         crop->defrect.left = crop->defrect.top = 0;
1232         crop->defrect.height = crop->bounds.height = common->height;
1233         crop->defrect.width = crop->bounds.width = common->width;
1234
1235         return 0;
1236 }
1237
1238 static int vpif_enum_output(struct file *file, void *fh,
1239                                 struct v4l2_output *output)
1240 {
1241
1242         struct vpif_display_config *config = vpif_dev->platform_data;
1243
1244         if (output->index >= config->output_count) {
1245                 vpif_dbg(1, debug, "Invalid output index\n");
1246                 return -EINVAL;
1247         }
1248
1249         strcpy(output->name, config->output[output->index]);
1250         output->type = V4L2_OUTPUT_TYPE_ANALOG;
1251         output->std = DM646X_V4L2_STD;
1252
1253         return 0;
1254 }
1255
1256 static int vpif_s_output(struct file *file, void *priv, unsigned int i)
1257 {
1258         struct vpif_fh *fh = priv;
1259         struct channel_obj *ch = fh->channel;
1260         struct video_obj *vid_ch = &ch->video;
1261         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1262         int ret = 0;
1263
1264         if (mutex_lock_interruptible(&common->lock))
1265                 return -ERESTARTSYS;
1266
1267         if (common->started) {
1268                 vpif_err("Streaming in progress\n");
1269                 ret = -EBUSY;
1270                 goto s_output_exit;
1271         }
1272
1273         ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
1274                                                         s_routing, 0, i, 0);
1275
1276         if (ret < 0)
1277                 vpif_err("Failed to set output standard\n");
1278
1279         vid_ch->output_id = i;
1280
1281 s_output_exit:
1282         mutex_unlock(&common->lock);
1283         return ret;
1284 }
1285
1286 static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
1287 {
1288         struct vpif_fh *fh = priv;
1289         struct channel_obj *ch = fh->channel;
1290         struct video_obj *vid_ch = &ch->video;
1291
1292         *i = vid_ch->output_id;
1293
1294         return 0;
1295 }
1296
1297 static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
1298 {
1299         struct vpif_fh *fh = priv;
1300         struct channel_obj *ch = fh->channel;
1301
1302         *p = v4l2_prio_max(&ch->prio);
1303
1304         return 0;
1305 }
1306
1307 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1308 {
1309         struct vpif_fh *fh = priv;
1310         struct channel_obj *ch = fh->channel;
1311
1312         return v4l2_prio_change(&ch->prio, &fh->prio, p);
1313 }
1314
1315 /* vpif display ioctl operations */
1316 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1317         .vidioc_querycap                = vpif_querycap,
1318         .vidioc_g_priority              = vpif_g_priority,
1319         .vidioc_s_priority              = vpif_s_priority,
1320         .vidioc_enum_fmt_vid_out        = vpif_enum_fmt_vid_out,
1321         .vidioc_g_fmt_vid_out           = vpif_g_fmt_vid_out,
1322         .vidioc_s_fmt_vid_out           = vpif_s_fmt_vid_out,
1323         .vidioc_try_fmt_vid_out         = vpif_try_fmt_vid_out,
1324         .vidioc_reqbufs                 = vpif_reqbufs,
1325         .vidioc_querybuf                = vpif_querybuf,
1326         .vidioc_qbuf                    = vpif_qbuf,
1327         .vidioc_dqbuf                   = vpif_dqbuf,
1328         .vidioc_streamon                = vpif_streamon,
1329         .vidioc_streamoff               = vpif_streamoff,
1330         .vidioc_s_std                   = vpif_s_std,
1331         .vidioc_g_std                   = vpif_g_std,
1332         .vidioc_enum_output             = vpif_enum_output,
1333         .vidioc_s_output                = vpif_s_output,
1334         .vidioc_g_output                = vpif_g_output,
1335         .vidioc_cropcap                 = vpif_cropcap,
1336 };
1337
1338 static const struct v4l2_file_operations vpif_fops = {
1339         .owner          = THIS_MODULE,
1340         .open           = vpif_open,
1341         .release        = vpif_release,
1342         .ioctl          = video_ioctl2,
1343         .mmap           = vpif_mmap,
1344         .poll           = vpif_poll
1345 };
1346
1347 static struct video_device vpif_video_template = {
1348         .name           = "vpif",
1349         .fops           = &vpif_fops,
1350         .ioctl_ops      = &vpif_ioctl_ops,
1351         .tvnorms        = DM646X_V4L2_STD,
1352         .current_norm   = V4L2_STD_625_50,
1353
1354 };
1355
1356 /*Configure the channels, buffer sizei, request irq */
1357 static int initialize_vpif(void)
1358 {
1359         int free_channel_objects_index;
1360         int free_buffer_channel_index;
1361         int free_buffer_index;
1362         int err = 0, i, j;
1363
1364         /* Default number of buffers should be 3 */
1365         if ((ch2_numbuffers > 0) &&
1366             (ch2_numbuffers < config_params.min_numbuffers))
1367                 ch2_numbuffers = config_params.min_numbuffers;
1368         if ((ch3_numbuffers > 0) &&
1369             (ch3_numbuffers < config_params.min_numbuffers))
1370                 ch3_numbuffers = config_params.min_numbuffers;
1371
1372         /* Set buffer size to min buffers size if invalid buffer size is
1373          * given */
1374         if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
1375                 ch2_bufsize =
1376                     config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
1377         if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
1378                 ch3_bufsize =
1379                     config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
1380
1381         config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
1382
1383         if (ch2_numbuffers) {
1384                 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
1385                                                         ch2_bufsize;
1386         }
1387         config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
1388
1389         if (ch3_numbuffers) {
1390                 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
1391                                                         ch3_bufsize;
1392         }
1393
1394         /* Allocate memory for six channel objects */
1395         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1396                 vpif_obj.dev[i] =
1397                     kmalloc(sizeof(struct channel_obj), GFP_KERNEL);
1398                 /* If memory allocation fails, return error */
1399                 if (!vpif_obj.dev[i]) {
1400                         free_channel_objects_index = i;
1401                         err = -ENOMEM;
1402                         goto vpif_init_free_channel_objects;
1403                 }
1404         }
1405
1406         free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
1407         free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
1408         free_buffer_index = config_params.numbuffers[i - 1];
1409
1410         return 0;
1411
1412 vpif_init_free_channel_objects:
1413         for (j = 0; j < free_channel_objects_index; j++)
1414                 kfree(vpif_obj.dev[j]);
1415         return err;
1416 }
1417
1418 /*
1419  * vpif_probe: This function creates device entries by register itself to the
1420  * V4L2 driver and initializes fields of each channel objects
1421  */
1422 static __init int vpif_probe(struct platform_device *pdev)
1423 {
1424         struct vpif_subdev_info *subdevdata;
1425         struct vpif_display_config *config;
1426         int i, j = 0, k, q, m, err = 0;
1427         struct i2c_adapter *i2c_adap;
1428         struct common_obj *common;
1429         struct channel_obj *ch;
1430         struct video_device *vfd;
1431         struct resource *res;
1432         int subdev_count;
1433
1434         vpif_dev = &pdev->dev;
1435
1436         err = initialize_vpif();
1437
1438         if (err) {
1439                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1440                 return err;
1441         }
1442
1443         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1444         if (err) {
1445                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1446                 return err;
1447         }
1448
1449         k = 0;
1450         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
1451                 for (i = res->start; i <= res->end; i++) {
1452                         if (request_irq(i, vpif_channel_isr, IRQF_DISABLED,
1453                                         "DM646x_Display",
1454                                 (void *)(&vpif_obj.dev[k]->channel_id))) {
1455                                 err = -EBUSY;
1456                                 goto vpif_int_err;
1457                         }
1458                 }
1459                 k++;
1460         }
1461
1462         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1463
1464                 /* Get the pointer to the channel object */
1465                 ch = vpif_obj.dev[i];
1466
1467                 /* Allocate memory for video device */
1468                 vfd = video_device_alloc();
1469                 if (vfd == NULL) {
1470                         for (j = 0; j < i; j++) {
1471                                 ch = vpif_obj.dev[j];
1472                                 video_device_release(ch->video_dev);
1473                         }
1474                         err = -ENOMEM;
1475                         goto vpif_int_err;
1476                 }
1477
1478                 /* Initialize field of video device */
1479                 *vfd = vpif_video_template;
1480                 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1481                 vfd->release = video_device_release;
1482                 snprintf(vfd->name, sizeof(vfd->name),
1483                          "DM646x_VPIFDisplay_DRIVER_V%d.%d.%d",
1484                          (VPIF_DISPLAY_VERSION_CODE >> 16) & 0xff,
1485                          (VPIF_DISPLAY_VERSION_CODE >> 8) & 0xff,
1486                          (VPIF_DISPLAY_VERSION_CODE) & 0xff);
1487
1488                 /* Set video_dev to the video device */
1489                 ch->video_dev = vfd;
1490         }
1491
1492         for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
1493                 ch = vpif_obj.dev[j];
1494                 /* Initialize field of the channel objects */
1495                 atomic_set(&ch->usrs, 0);
1496                 for (k = 0; k < VPIF_NUMOBJECTS; k++) {
1497                         ch->common[k].numbuffers = 0;
1498                         common = &ch->common[k];
1499                         common->io_usrs = 0;
1500                         common->started = 0;
1501                         spin_lock_init(&common->irqlock);
1502                         mutex_init(&common->lock);
1503                         common->numbuffers = 0;
1504                         common->set_addr = NULL;
1505                         common->ytop_off = common->ybtm_off = 0;
1506                         common->ctop_off = common->cbtm_off = 0;
1507                         common->cur_frm = common->next_frm = NULL;
1508                         memset(&common->fmt, 0, sizeof(common->fmt));
1509                         common->numbuffers = config_params.numbuffers[k];
1510
1511                 }
1512                 ch->initialized = 0;
1513                 ch->channel_id = j;
1514                 if (j < 2)
1515                         ch->common[VPIF_VIDEO_INDEX].numbuffers =
1516                             config_params.numbuffers[ch->channel_id];
1517                 else
1518                         ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
1519
1520                 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
1521
1522                 /* Initialize prio member of channel object */
1523                 v4l2_prio_init(&ch->prio);
1524                 ch->common[VPIF_VIDEO_INDEX].fmt.type =
1525                                                 V4L2_BUF_TYPE_VIDEO_OUTPUT;
1526
1527                 /* register video device */
1528                 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
1529                                 (int)ch, (int)&ch->video_dev);
1530
1531                 err = video_register_device(ch->video_dev,
1532                                           VFL_TYPE_GRABBER, (j ? 3 : 2));
1533                 if (err < 0)
1534                         goto probe_out;
1535
1536                 video_set_drvdata(ch->video_dev, ch);
1537         }
1538
1539         i2c_adap = i2c_get_adapter(1);
1540         config = pdev->dev.platform_data;
1541         subdev_count = config->subdev_count;
1542         subdevdata = config->subdevinfo;
1543         vpif_obj.sd = kmalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1544                                                                 GFP_KERNEL);
1545         if (vpif_obj.sd == NULL) {
1546                 vpif_err("unable to allocate memory for subdevice pointers\n");
1547                 err = -ENOMEM;
1548                 goto probe_out;
1549         }
1550
1551         for (i = 0; i < subdev_count; i++) {
1552                 vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1553                                                 i2c_adap, subdevdata[i].name,
1554                                                 &subdevdata[i].board_info,
1555                                                 NULL);
1556                 if (!vpif_obj.sd[i]) {
1557                         vpif_err("Error registering v4l2 subdevice\n");
1558                         goto probe_subdev_out;
1559                 }
1560
1561                 if (vpif_obj.sd[i])
1562                         vpif_obj.sd[i]->grp_id = 1 << i;
1563         }
1564
1565         return 0;
1566
1567 probe_subdev_out:
1568         kfree(vpif_obj.sd);
1569 probe_out:
1570         for (k = 0; k < j; k++) {
1571                 ch = vpif_obj.dev[k];
1572                 video_unregister_device(ch->video_dev);
1573                 video_device_release(ch->video_dev);
1574                 ch->video_dev = NULL;
1575         }
1576 vpif_int_err:
1577         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1578         vpif_err("VPIF IRQ request failed\n");
1579         for (q = k; k >= 0; k--) {
1580                 for (m = i; m >= res->start; m--)
1581                         free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id));
1582                 res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1);
1583                 m = res->end;
1584         }
1585
1586         return err;
1587 }
1588
1589 /*
1590  * vpif_remove: It un-register channels from V4L2 driver
1591  */
1592 static int vpif_remove(struct platform_device *device)
1593 {
1594         struct channel_obj *ch;
1595         int i;
1596
1597         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1598
1599         /* un-register device */
1600         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
1601                 /* Get the pointer to the channel object */
1602                 ch = vpif_obj.dev[i];
1603                 /* Unregister video device */
1604                 video_unregister_device(ch->video_dev);
1605
1606                 ch->video_dev = NULL;
1607         }
1608
1609         return 0;
1610 }
1611
1612 static struct platform_driver vpif_driver = {
1613         .driver = {
1614                         .name   = "vpif_display",
1615                         .owner  = THIS_MODULE,
1616         },
1617         .probe  = vpif_probe,
1618         .remove = vpif_remove,
1619 };
1620
1621 static __init int vpif_init(void)
1622 {
1623         return platform_driver_register(&vpif_driver);
1624 }
1625
1626 /*
1627  * vpif_cleanup: This function un-registers device and driver to the kernel,
1628  * frees requested irq handler and de-allocates memory allocated for channel
1629  * objects.
1630  */
1631 static void vpif_cleanup(void)
1632 {
1633         struct platform_device *pdev;
1634         struct resource *res;
1635         int irq_num;
1636         int i = 0;
1637
1638         pdev = container_of(vpif_dev, struct platform_device, dev);
1639
1640         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
1641                 for (irq_num = res->start; irq_num <= res->end; irq_num++)
1642                         free_irq(irq_num,
1643                                  (void *)(&vpif_obj.dev[i]->channel_id));
1644                 i++;
1645         }
1646
1647         platform_driver_unregister(&vpif_driver);
1648         kfree(vpif_obj.sd);
1649         for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
1650                 kfree(vpif_obj.dev[i]);
1651 }
1652
1653 module_init(vpif_init);
1654 module_exit(vpif_cleanup);