vpif_display.c revision ffb4877ba013f94322083f77cbb05b35c2a218aa
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#include <linux/slab.h> 34 35#include <asm/irq.h> 36#include <asm/page.h> 37 38#include <media/adv7343.h> 39#include <media/v4l2-device.h> 40#include <media/v4l2-ioctl.h> 41 42#include <mach/dm646x.h> 43 44#include "vpif_display.h" 45#include "vpif.h" 46 47MODULE_DESCRIPTION("TI DaVinci VPIF Display driver"); 48MODULE_LICENSE("GPL"); 49 50#define DM646X_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50) 51 52#define vpif_err(fmt, arg...) v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg) 53#define vpif_dbg(level, debug, fmt, arg...) \ 54 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg) 55 56static int debug = 1; 57static u32 ch2_numbuffers = 3; 58static u32 ch3_numbuffers = 3; 59static u32 ch2_bufsize = 1920 * 1080 * 2; 60static u32 ch3_bufsize = 720 * 576 * 2; 61 62module_param(debug, int, 0644); 63module_param(ch2_numbuffers, uint, S_IRUGO); 64module_param(ch3_numbuffers, uint, S_IRUGO); 65module_param(ch2_bufsize, uint, S_IRUGO); 66module_param(ch3_bufsize, uint, S_IRUGO); 67 68MODULE_PARM_DESC(debug, "Debug level 0-1"); 69MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)"); 70MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)"); 71MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)"); 72MODULE_PARM_DESC(ch3_bufsize, "Channel3 buffer size (default:720 x 576 x 2)"); 73 74static struct vpif_config_params config_params = { 75 .min_numbuffers = 3, 76 .numbuffers[0] = 3, 77 .numbuffers[1] = 3, 78 .min_bufsize[0] = 720 * 480 * 2, 79 .min_bufsize[1] = 720 * 480 * 2, 80 .channel_bufsize[0] = 1920 * 1080 * 2, 81 .channel_bufsize[1] = 720 * 576 * 2, 82}; 83 84static struct vpif_device vpif_obj = { {NULL} }; 85static struct device *vpif_dev; 86 87static const struct vpif_channel_config_params ch_params[] = { 88 { 89 "NTSC", 720, 480, 30, 0, 1, 268, 1440, 1, 23, 263, 266, 90 286, 525, 525, 0, 1, 0, V4L2_STD_525_60, 91 }, 92 { 93 "PAL", 720, 576, 25, 0, 1, 280, 1440, 1, 23, 311, 313, 94 336, 624, 625, 0, 1, 0, V4L2_STD_625_50, 95 }, 96}; 97 98/* 99 * vpif_uservirt_to_phys: This function is used to convert user 100 * space virtual address to physical address. 101 */ 102static u32 vpif_uservirt_to_phys(u32 virtp) 103{ 104 struct mm_struct *mm = current->mm; 105 unsigned long physp = 0; 106 struct vm_area_struct *vma; 107 108 vma = find_vma(mm, virtp); 109 110 /* For kernel direct-mapped memory, take the easy way */ 111 if (virtp >= PAGE_OFFSET) { 112 physp = virt_to_phys((void *)virtp); 113 } else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) { 114 /* this will catch, kernel-allocated, mmaped-to-usermode addr */ 115 physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start); 116 } else { 117 /* otherwise, use get_user_pages() for general userland pages */ 118 int res, nr_pages = 1; 119 struct page *pages; 120 down_read(¤t->mm->mmap_sem); 121 122 res = get_user_pages(current, current->mm, 123 virtp, nr_pages, 1, 0, &pages, NULL); 124 up_read(¤t->mm->mmap_sem); 125 126 if (res == nr_pages) { 127 physp = __pa(page_address(&pages[0]) + 128 (virtp & ~PAGE_MASK)); 129 } else { 130 vpif_err("get_user_pages failed\n"); 131 return 0; 132 } 133 } 134 135 return physp; 136} 137 138/* 139 * buffer_prepare: This is the callback function called from videobuf_qbuf() 140 * function the buffer is prepared and user space virtual address is converted 141 * into physical address 142 */ 143static int vpif_buffer_prepare(struct videobuf_queue *q, 144 struct videobuf_buffer *vb, 145 enum v4l2_field field) 146{ 147 struct vpif_fh *fh = q->priv_data; 148 struct common_obj *common; 149 unsigned long addr; 150 151 common = &fh->channel->common[VPIF_VIDEO_INDEX]; 152 if (VIDEOBUF_NEEDS_INIT == vb->state) { 153 vb->width = common->width; 154 vb->height = common->height; 155 vb->size = vb->width * vb->height; 156 vb->field = field; 157 } 158 vb->state = VIDEOBUF_PREPARED; 159 160 /* if user pointer memory mechanism is used, get the physical 161 * address of the buffer */ 162 if (V4L2_MEMORY_USERPTR == common->memory) { 163 if (!vb->baddr) { 164 vpif_err("buffer_address is 0\n"); 165 return -EINVAL; 166 } 167 168 vb->boff = vpif_uservirt_to_phys(vb->baddr); 169 if (!ISALIGNED(vb->boff)) 170 goto buf_align_exit; 171 } 172 173 addr = vb->boff; 174 if (q->streaming && (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) { 175 if (!ISALIGNED(addr + common->ytop_off) || 176 !ISALIGNED(addr + common->ybtm_off) || 177 !ISALIGNED(addr + common->ctop_off) || 178 !ISALIGNED(addr + common->cbtm_off)) 179 goto buf_align_exit; 180 } 181 return 0; 182 183buf_align_exit: 184 vpif_err("buffer offset not aligned to 8 bytes\n"); 185 return -EINVAL; 186} 187 188/* 189 * vpif_buffer_setup: This function allocates memory for the buffers 190 */ 191static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count, 192 unsigned int *size) 193{ 194 struct vpif_fh *fh = q->priv_data; 195 struct channel_obj *ch = fh->channel; 196 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 197 198 if (V4L2_MEMORY_MMAP != common->memory) 199 return 0; 200 201 *size = config_params.channel_bufsize[ch->channel_id]; 202 if (*count < config_params.min_numbuffers) 203 *count = config_params.min_numbuffers; 204 205 return 0; 206} 207 208/* 209 * vpif_buffer_queue: This function adds the buffer to DMA queue 210 */ 211static void vpif_buffer_queue(struct videobuf_queue *q, 212 struct videobuf_buffer *vb) 213{ 214 struct vpif_fh *fh = q->priv_data; 215 struct common_obj *common; 216 217 common = &fh->channel->common[VPIF_VIDEO_INDEX]; 218 219 /* add the buffer to the DMA queue */ 220 list_add_tail(&vb->queue, &common->dma_queue); 221 vb->state = VIDEOBUF_QUEUED; 222} 223 224/* 225 * vpif_buffer_release: This function is called from the videobuf layer to 226 * free memory allocated to the buffers 227 */ 228static void vpif_buffer_release(struct videobuf_queue *q, 229 struct videobuf_buffer *vb) 230{ 231 struct vpif_fh *fh = q->priv_data; 232 struct channel_obj *ch = fh->channel; 233 struct common_obj *common; 234 unsigned int buf_size = 0; 235 236 common = &ch->common[VPIF_VIDEO_INDEX]; 237 238 videobuf_dma_contig_free(q, vb); 239 vb->state = VIDEOBUF_NEEDS_INIT; 240 241 if (V4L2_MEMORY_MMAP != common->memory) 242 return; 243 244 buf_size = config_params.channel_bufsize[ch->channel_id]; 245} 246 247static struct videobuf_queue_ops video_qops = { 248 .buf_setup = vpif_buffer_setup, 249 .buf_prepare = vpif_buffer_prepare, 250 .buf_queue = vpif_buffer_queue, 251 .buf_release = vpif_buffer_release, 252}; 253static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} }; 254 255static void process_progressive_mode(struct common_obj *common) 256{ 257 unsigned long addr = 0; 258 259 /* Get the next buffer from buffer queue */ 260 common->next_frm = list_entry(common->dma_queue.next, 261 struct videobuf_buffer, queue); 262 /* Remove that buffer from the buffer queue */ 263 list_del(&common->next_frm->queue); 264 /* Mark status of the buffer as active */ 265 common->next_frm->state = VIDEOBUF_ACTIVE; 266 267 /* Set top and bottom field addrs in VPIF registers */ 268 addr = videobuf_to_dma_contig(common->next_frm); 269 common->set_addr(addr + common->ytop_off, 270 addr + common->ybtm_off, 271 addr + common->ctop_off, 272 addr + common->cbtm_off); 273} 274 275static void process_interlaced_mode(int fid, struct common_obj *common) 276{ 277 /* device field id and local field id are in sync */ 278 /* If this is even field */ 279 if (0 == fid) { 280 if (common->cur_frm == common->next_frm) 281 return; 282 283 /* one frame is displayed If next frame is 284 * available, release cur_frm and move on */ 285 /* Copy frame display time */ 286 do_gettimeofday(&common->cur_frm->ts); 287 /* Change status of the cur_frm */ 288 common->cur_frm->state = VIDEOBUF_DONE; 289 /* unlock semaphore on cur_frm */ 290 wake_up_interruptible(&common->cur_frm->done); 291 /* Make cur_frm pointing to next_frm */ 292 common->cur_frm = common->next_frm; 293 294 } else if (1 == fid) { /* odd field */ 295 if (list_empty(&common->dma_queue) 296 || (common->cur_frm != common->next_frm)) { 297 return; 298 } 299 /* one field is displayed configure the next 300 * frame if it is available else hold on current 301 * frame */ 302 /* Get next from the buffer queue */ 303 process_progressive_mode(common); 304 305 } 306} 307 308/* 309 * vpif_channel_isr: It changes status of the displayed buffer, takes next 310 * buffer from the queue and sets its address in VPIF registers 311 */ 312static irqreturn_t vpif_channel_isr(int irq, void *dev_id) 313{ 314 struct vpif_device *dev = &vpif_obj; 315 struct channel_obj *ch; 316 struct common_obj *common; 317 enum v4l2_field field; 318 int fid = -1, i; 319 int channel_id = 0; 320 321 channel_id = *(int *)(dev_id); 322 ch = dev->dev[channel_id]; 323 field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field; 324 for (i = 0; i < VPIF_NUMOBJECTS; i++) { 325 common = &ch->common[i]; 326 /* If streaming is started in this channel */ 327 if (0 == common->started) 328 continue; 329 330 if (1 == ch->vpifparams.std_info.frm_fmt) { 331 if (list_empty(&common->dma_queue)) 332 continue; 333 334 /* Progressive mode */ 335 if (!channel_first_int[i][channel_id]) { 336 /* Mark status of the cur_frm to 337 * done and unlock semaphore on it */ 338 do_gettimeofday(&common->cur_frm->ts); 339 common->cur_frm->state = VIDEOBUF_DONE; 340 wake_up_interruptible(&common->cur_frm->done); 341 /* Make cur_frm pointing to next_frm */ 342 common->cur_frm = common->next_frm; 343 } 344 345 channel_first_int[i][channel_id] = 0; 346 process_progressive_mode(common); 347 } else { 348 /* Interlaced mode */ 349 /* If it is first interrupt, ignore it */ 350 351 if (channel_first_int[i][channel_id]) { 352 channel_first_int[i][channel_id] = 0; 353 continue; 354 } 355 356 if (0 == i) { 357 ch->field_id ^= 1; 358 /* Get field id from VPIF registers */ 359 fid = vpif_channel_getfid(ch->channel_id + 2); 360 /* If fid does not match with stored field id */ 361 if (fid != ch->field_id) { 362 /* Make them in sync */ 363 if (0 == fid) 364 ch->field_id = fid; 365 366 return IRQ_HANDLED; 367 } 368 } 369 process_interlaced_mode(fid, common); 370 } 371 } 372 373 return IRQ_HANDLED; 374} 375 376static int vpif_get_std_info(struct channel_obj *ch) 377{ 378 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 379 struct video_obj *vid_ch = &ch->video; 380 struct vpif_params *vpifparams = &ch->vpifparams; 381 struct vpif_channel_config_params *std_info = &vpifparams->std_info; 382 const struct vpif_channel_config_params *config; 383 384 int index; 385 386 std_info->stdid = vid_ch->stdid; 387 if (!std_info->stdid) 388 return -1; 389 390 for (index = 0; index < ARRAY_SIZE(ch_params); index++) { 391 config = &ch_params[index]; 392 if (config->stdid & std_info->stdid) { 393 memcpy(std_info, config, sizeof(*config)); 394 break; 395 } 396 } 397 398 if (index == ARRAY_SIZE(ch_params)) 399 return -1; 400 401 common->fmt.fmt.pix.width = std_info->width; 402 common->fmt.fmt.pix.height = std_info->height; 403 vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n", 404 common->fmt.fmt.pix.width, common->fmt.fmt.pix.height); 405 406 /* Set height and width paramateres */ 407 ch->common[VPIF_VIDEO_INDEX].height = std_info->height; 408 ch->common[VPIF_VIDEO_INDEX].width = std_info->width; 409 410 return 0; 411} 412 413/* 414 * vpif_calculate_offsets: This function calculates buffers offset for Y and C 415 * in the top and bottom field 416 */ 417static void vpif_calculate_offsets(struct channel_obj *ch) 418{ 419 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 420 struct vpif_params *vpifparams = &ch->vpifparams; 421 enum v4l2_field field = common->fmt.fmt.pix.field; 422 struct video_obj *vid_ch = &ch->video; 423 unsigned int hpitch, vpitch, sizeimage; 424 425 if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) { 426 if (ch->vpifparams.std_info.frm_fmt) 427 vid_ch->buf_field = V4L2_FIELD_NONE; 428 else 429 vid_ch->buf_field = V4L2_FIELD_INTERLACED; 430 } else { 431 vid_ch->buf_field = common->fmt.fmt.pix.field; 432 } 433 434 if (V4L2_MEMORY_USERPTR == common->memory) 435 sizeimage = common->fmt.fmt.pix.sizeimage; 436 else 437 sizeimage = config_params.channel_bufsize[ch->channel_id]; 438 439 hpitch = common->fmt.fmt.pix.bytesperline; 440 vpitch = sizeimage / (hpitch * 2); 441 if ((V4L2_FIELD_NONE == vid_ch->buf_field) || 442 (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) { 443 common->ytop_off = 0; 444 common->ybtm_off = hpitch; 445 common->ctop_off = sizeimage / 2; 446 common->cbtm_off = sizeimage / 2 + hpitch; 447 } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) { 448 common->ytop_off = 0; 449 common->ybtm_off = sizeimage / 4; 450 common->ctop_off = sizeimage / 2; 451 common->cbtm_off = common->ctop_off + sizeimage / 4; 452 } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) { 453 common->ybtm_off = 0; 454 common->ytop_off = sizeimage / 4; 455 common->cbtm_off = sizeimage / 2; 456 common->ctop_off = common->cbtm_off + sizeimage / 4; 457 } 458 459 if ((V4L2_FIELD_NONE == vid_ch->buf_field) || 460 (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) { 461 vpifparams->video_params.storage_mode = 1; 462 } else { 463 vpifparams->video_params.storage_mode = 0; 464 } 465 466 if (ch->vpifparams.std_info.frm_fmt == 1) { 467 vpifparams->video_params.hpitch = 468 common->fmt.fmt.pix.bytesperline; 469 } else { 470 if ((field == V4L2_FIELD_ANY) || 471 (field == V4L2_FIELD_INTERLACED)) 472 vpifparams->video_params.hpitch = 473 common->fmt.fmt.pix.bytesperline * 2; 474 else 475 vpifparams->video_params.hpitch = 476 common->fmt.fmt.pix.bytesperline; 477 } 478 479 ch->vpifparams.video_params.stdid = ch->vpifparams.std_info.stdid; 480} 481 482static void vpif_config_format(struct channel_obj *ch) 483{ 484 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 485 486 common->fmt.fmt.pix.field = V4L2_FIELD_ANY; 487 if (config_params.numbuffers[ch->channel_id] == 0) 488 common->memory = V4L2_MEMORY_USERPTR; 489 else 490 common->memory = V4L2_MEMORY_MMAP; 491 492 common->fmt.fmt.pix.sizeimage = 493 config_params.channel_bufsize[ch->channel_id]; 494 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P; 495 common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 496} 497 498static int vpif_check_format(struct channel_obj *ch, 499 struct v4l2_pix_format *pixfmt) 500{ 501 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 502 enum v4l2_field field = pixfmt->field; 503 u32 sizeimage, hpitch, vpitch; 504 505 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) 506 goto invalid_fmt_exit; 507 508 if (!(VPIF_VALID_FIELD(field))) 509 goto invalid_fmt_exit; 510 511 if (pixfmt->bytesperline <= 0) 512 goto invalid_pitch_exit; 513 514 if (V4L2_MEMORY_USERPTR == common->memory) 515 sizeimage = pixfmt->sizeimage; 516 else 517 sizeimage = config_params.channel_bufsize[ch->channel_id]; 518 519 if (vpif_get_std_info(ch)) { 520 vpif_err("Error getting the standard info\n"); 521 return -EINVAL; 522 } 523 524 hpitch = pixfmt->bytesperline; 525 vpitch = sizeimage / (hpitch * 2); 526 527 /* Check for valid value of pitch */ 528 if ((hpitch < ch->vpifparams.std_info.width) || 529 (vpitch < ch->vpifparams.std_info.height)) 530 goto invalid_pitch_exit; 531 532 /* Check for 8 byte alignment */ 533 if (!ISALIGNED(hpitch)) { 534 vpif_err("invalid pitch alignment\n"); 535 return -EINVAL; 536 } 537 pixfmt->width = common->fmt.fmt.pix.width; 538 pixfmt->height = common->fmt.fmt.pix.height; 539 540 return 0; 541 542invalid_fmt_exit: 543 vpif_err("invalid field format\n"); 544 return -EINVAL; 545 546invalid_pitch_exit: 547 vpif_err("invalid pitch\n"); 548 return -EINVAL; 549} 550 551static void vpif_config_addr(struct channel_obj *ch, int muxmode) 552{ 553 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 554 555 if (VPIF_CHANNEL3_VIDEO == ch->channel_id) { 556 common->set_addr = ch3_set_videobuf_addr; 557 } else { 558 if (2 == muxmode) 559 common->set_addr = ch2_set_videobuf_addr_yc_nmux; 560 else 561 common->set_addr = ch2_set_videobuf_addr; 562 } 563} 564 565/* 566 * vpif_mmap: It is used to map kernel space buffers into user spaces 567 */ 568static int vpif_mmap(struct file *filep, struct vm_area_struct *vma) 569{ 570 struct vpif_fh *fh = filep->private_data; 571 struct common_obj *common = &fh->channel->common[VPIF_VIDEO_INDEX]; 572 573 return videobuf_mmap_mapper(&common->buffer_queue, vma); 574} 575 576/* 577 * vpif_poll: It is used for select/poll system call 578 */ 579static unsigned int vpif_poll(struct file *filep, poll_table *wait) 580{ 581 struct vpif_fh *fh = filep->private_data; 582 struct channel_obj *ch = fh->channel; 583 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 584 585 if (common->started) 586 return videobuf_poll_stream(filep, &common->buffer_queue, wait); 587 588 return 0; 589} 590 591/* 592 * vpif_open: It creates object of file handle structure and stores it in 593 * private_data member of filepointer 594 */ 595static int vpif_open(struct file *filep) 596{ 597 struct video_device *vdev = video_devdata(filep); 598 struct channel_obj *ch = NULL; 599 struct vpif_fh *fh = NULL; 600 601 ch = video_get_drvdata(vdev); 602 /* Allocate memory for the file handle object */ 603 fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL); 604 if (fh == NULL) { 605 vpif_err("unable to allocate memory for file handle object\n"); 606 return -ENOMEM; 607 } 608 609 /* store pointer to fh in private_data member of filep */ 610 filep->private_data = fh; 611 fh->channel = ch; 612 fh->initialized = 0; 613 if (!ch->initialized) { 614 fh->initialized = 1; 615 ch->initialized = 1; 616 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams)); 617 } 618 619 /* Increment channel usrs counter */ 620 atomic_inc(&ch->usrs); 621 /* Set io_allowed[VPIF_VIDEO_INDEX] member to false */ 622 fh->io_allowed[VPIF_VIDEO_INDEX] = 0; 623 /* Initialize priority of this instance to default priority */ 624 fh->prio = V4L2_PRIORITY_UNSET; 625 v4l2_prio_open(&ch->prio, &fh->prio); 626 627 return 0; 628} 629 630/* 631 * vpif_release: This function deletes buffer queue, frees the buffers and 632 * the vpif file handle 633 */ 634static int vpif_release(struct file *filep) 635{ 636 struct vpif_fh *fh = filep->private_data; 637 struct channel_obj *ch = fh->channel; 638 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 639 640 if (mutex_lock_interruptible(&common->lock)) 641 return -ERESTARTSYS; 642 643 /* if this instance is doing IO */ 644 if (fh->io_allowed[VPIF_VIDEO_INDEX]) { 645 /* Reset io_usrs member of channel object */ 646 common->io_usrs = 0; 647 /* Disable channel */ 648 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) { 649 enable_channel2(0); 650 channel2_intr_enable(0); 651 } 652 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) || 653 (2 == common->started)) { 654 enable_channel3(0); 655 channel3_intr_enable(0); 656 } 657 common->started = 0; 658 /* Free buffers allocated */ 659 videobuf_queue_cancel(&common->buffer_queue); 660 videobuf_mmap_free(&common->buffer_queue); 661 common->numbuffers = 662 config_params.numbuffers[ch->channel_id]; 663 } 664 665 mutex_unlock(&common->lock); 666 667 /* Decrement channel usrs counter */ 668 atomic_dec(&ch->usrs); 669 /* If this file handle has initialize encoder device, reset it */ 670 if (fh->initialized) 671 ch->initialized = 0; 672 673 /* Close the priority */ 674 v4l2_prio_close(&ch->prio, fh->prio); 675 filep->private_data = NULL; 676 fh->initialized = 0; 677 kfree(fh); 678 679 return 0; 680} 681 682/* functions implementing ioctls */ 683 684static int vpif_querycap(struct file *file, void *priv, 685 struct v4l2_capability *cap) 686{ 687 struct vpif_display_config *config = vpif_dev->platform_data; 688 689 cap->version = VPIF_DISPLAY_VERSION_CODE; 690 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 691 strlcpy(cap->driver, "vpif display", sizeof(cap->driver)); 692 strlcpy(cap->bus_info, "Platform", sizeof(cap->bus_info)); 693 strlcpy(cap->card, config->card_name, sizeof(cap->card)); 694 695 return 0; 696} 697 698static int vpif_enum_fmt_vid_out(struct file *file, void *priv, 699 struct v4l2_fmtdesc *fmt) 700{ 701 if (fmt->index != 0) { 702 vpif_err("Invalid format index\n"); 703 return -EINVAL; 704 } 705 706 /* Fill in the information about format */ 707 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 708 strcpy(fmt->description, "YCbCr4:2:2 YC Planar"); 709 fmt->pixelformat = V4L2_PIX_FMT_YUV422P; 710 711 return 0; 712} 713 714static int vpif_g_fmt_vid_out(struct file *file, void *priv, 715 struct v4l2_format *fmt) 716{ 717 struct vpif_fh *fh = priv; 718 struct channel_obj *ch = fh->channel; 719 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 720 721 /* Check the validity of the buffer type */ 722 if (common->fmt.type != fmt->type) 723 return -EINVAL; 724 725 /* Fill in the information about format */ 726 if (mutex_lock_interruptible(&common->lock)) 727 return -ERESTARTSYS; 728 729 if (vpif_get_std_info(ch)) { 730 vpif_err("Error getting the standard info\n"); 731 return -EINVAL; 732 } 733 734 *fmt = common->fmt; 735 mutex_unlock(&common->lock); 736 return 0; 737} 738 739static int vpif_s_fmt_vid_out(struct file *file, void *priv, 740 struct v4l2_format *fmt) 741{ 742 struct vpif_fh *fh = priv; 743 struct v4l2_pix_format *pixfmt; 744 struct channel_obj *ch = fh->channel; 745 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 746 int ret = 0; 747 748 if ((VPIF_CHANNEL2_VIDEO == ch->channel_id) 749 || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) { 750 if (!fh->initialized) { 751 vpif_dbg(1, debug, "Channel Busy\n"); 752 return -EBUSY; 753 } 754 755 /* Check for the priority */ 756 ret = v4l2_prio_check(&ch->prio, fh->prio); 757 if (0 != ret) 758 return ret; 759 fh->initialized = 1; 760 } 761 762 if (common->started) { 763 vpif_dbg(1, debug, "Streaming in progress\n"); 764 return -EBUSY; 765 } 766 767 pixfmt = &fmt->fmt.pix; 768 /* Check for valid field format */ 769 ret = vpif_check_format(ch, pixfmt); 770 if (ret) 771 return ret; 772 773 /* store the pix format in the channel object */ 774 common->fmt.fmt.pix = *pixfmt; 775 /* store the format in the channel object */ 776 if (mutex_lock_interruptible(&common->lock)) 777 return -ERESTARTSYS; 778 779 common->fmt = *fmt; 780 mutex_unlock(&common->lock); 781 782 return 0; 783} 784 785static int vpif_try_fmt_vid_out(struct file *file, void *priv, 786 struct v4l2_format *fmt) 787{ 788 struct vpif_fh *fh = priv; 789 struct channel_obj *ch = fh->channel; 790 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 791 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix; 792 int ret = 0; 793 794 ret = vpif_check_format(ch, pixfmt); 795 if (ret) { 796 *pixfmt = common->fmt.fmt.pix; 797 pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2; 798 } 799 800 return ret; 801} 802 803static int vpif_reqbufs(struct file *file, void *priv, 804 struct v4l2_requestbuffers *reqbuf) 805{ 806 struct vpif_fh *fh = priv; 807 struct channel_obj *ch = fh->channel; 808 struct common_obj *common; 809 enum v4l2_field field; 810 u8 index = 0; 811 int ret = 0; 812 813 /* This file handle has not initialized the channel, 814 It is not allowed to do settings */ 815 if ((VPIF_CHANNEL2_VIDEO == ch->channel_id) 816 || (VPIF_CHANNEL3_VIDEO == ch->channel_id)) { 817 if (!fh->initialized) { 818 vpif_err("Channel Busy\n"); 819 return -EBUSY; 820 } 821 } 822 823 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type) 824 return -EINVAL; 825 826 index = VPIF_VIDEO_INDEX; 827 828 common = &ch->common[index]; 829 if (mutex_lock_interruptible(&common->lock)) 830 return -ERESTARTSYS; 831 832 if (common->fmt.type != reqbuf->type) { 833 ret = -EINVAL; 834 goto reqbuf_exit; 835 } 836 837 if (0 != common->io_usrs) { 838 ret = -EBUSY; 839 goto reqbuf_exit; 840 } 841 842 if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 843 if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY) 844 field = V4L2_FIELD_INTERLACED; 845 else 846 field = common->fmt.fmt.pix.field; 847 } else { 848 field = V4L2_VBI_INTERLACED; 849 } 850 851 /* Initialize videobuf queue as per the buffer type */ 852 videobuf_queue_dma_contig_init(&common->buffer_queue, 853 &video_qops, NULL, 854 &common->irqlock, 855 reqbuf->type, field, 856 sizeof(struct videobuf_buffer), fh); 857 858 /* Set io allowed member of file handle to TRUE */ 859 fh->io_allowed[index] = 1; 860 /* Increment io usrs member of channel object to 1 */ 861 common->io_usrs = 1; 862 /* Store type of memory requested in channel object */ 863 common->memory = reqbuf->memory; 864 INIT_LIST_HEAD(&common->dma_queue); 865 866 /* Allocate buffers */ 867 ret = videobuf_reqbufs(&common->buffer_queue, reqbuf); 868 869reqbuf_exit: 870 mutex_unlock(&common->lock); 871 return ret; 872} 873 874static int vpif_querybuf(struct file *file, void *priv, 875 struct v4l2_buffer *tbuf) 876{ 877 struct vpif_fh *fh = priv; 878 struct channel_obj *ch = fh->channel; 879 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 880 881 if (common->fmt.type != tbuf->type) 882 return -EINVAL; 883 884 return videobuf_querybuf(&common->buffer_queue, tbuf); 885} 886 887static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 888{ 889 890 struct vpif_fh *fh = priv; 891 struct channel_obj *ch = fh->channel; 892 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 893 struct v4l2_buffer tbuf = *buf; 894 struct videobuf_buffer *buf1; 895 unsigned long addr = 0; 896 unsigned long flags; 897 int ret = 0; 898 899 if (common->fmt.type != tbuf.type) 900 return -EINVAL; 901 902 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { 903 vpif_err("fh->io_allowed\n"); 904 return -EACCES; 905 } 906 907 if (!(list_empty(&common->dma_queue)) || 908 (common->cur_frm != common->next_frm) || 909 !(common->started) || 910 (common->started && (0 == ch->field_id))) 911 return videobuf_qbuf(&common->buffer_queue, buf); 912 913 /* bufferqueue is empty store buffer address in VPIF registers */ 914 mutex_lock(&common->buffer_queue.vb_lock); 915 buf1 = common->buffer_queue.bufs[tbuf.index]; 916 if (buf1->memory != tbuf.memory) { 917 vpif_err("invalid buffer type\n"); 918 goto qbuf_exit; 919 } 920 921 if ((buf1->state == VIDEOBUF_QUEUED) || 922 (buf1->state == VIDEOBUF_ACTIVE)) { 923 vpif_err("invalid state\n"); 924 goto qbuf_exit; 925 } 926 927 switch (buf1->memory) { 928 case V4L2_MEMORY_MMAP: 929 if (buf1->baddr == 0) 930 goto qbuf_exit; 931 break; 932 933 case V4L2_MEMORY_USERPTR: 934 if (tbuf.length < buf1->bsize) 935 goto qbuf_exit; 936 937 if ((VIDEOBUF_NEEDS_INIT != buf1->state) 938 && (buf1->baddr != tbuf.m.userptr)) 939 vpif_buffer_release(&common->buffer_queue, buf1); 940 buf1->baddr = tbuf.m.userptr; 941 break; 942 943 default: 944 goto qbuf_exit; 945 } 946 947 local_irq_save(flags); 948 ret = vpif_buffer_prepare(&common->buffer_queue, buf1, 949 common->buffer_queue.field); 950 if (ret < 0) { 951 local_irq_restore(flags); 952 goto qbuf_exit; 953 } 954 955 buf1->state = VIDEOBUF_ACTIVE; 956 addr = buf1->boff; 957 common->next_frm = buf1; 958 if (tbuf.type != V4L2_BUF_TYPE_SLICED_VBI_OUTPUT) { 959 common->set_addr((addr + common->ytop_off), 960 (addr + common->ybtm_off), 961 (addr + common->ctop_off), 962 (addr + common->cbtm_off)); 963 } 964 965 local_irq_restore(flags); 966 list_add_tail(&buf1->stream, &common->buffer_queue.stream); 967 mutex_unlock(&common->buffer_queue.vb_lock); 968 return 0; 969 970qbuf_exit: 971 mutex_unlock(&common->buffer_queue.vb_lock); 972 return -EINVAL; 973} 974 975static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id) 976{ 977 struct vpif_fh *fh = priv; 978 struct channel_obj *ch = fh->channel; 979 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 980 int ret = 0; 981 982 if (!(*std_id & DM646X_V4L2_STD)) 983 return -EINVAL; 984 985 if (common->started) { 986 vpif_err("streaming in progress\n"); 987 return -EBUSY; 988 } 989 990 /* Call encoder subdevice function to set the standard */ 991 if (mutex_lock_interruptible(&common->lock)) 992 return -ERESTARTSYS; 993 994 ch->video.stdid = *std_id; 995 /* Get the information about the standard */ 996 if (vpif_get_std_info(ch)) { 997 vpif_err("Error getting the standard info\n"); 998 return -EINVAL; 999 } 1000 1001 if ((ch->vpifparams.std_info.width * 1002 ch->vpifparams.std_info.height * 2) > 1003 config_params.channel_bufsize[ch->channel_id]) { 1004 vpif_err("invalid std for this size\n"); 1005 ret = -EINVAL; 1006 goto s_std_exit; 1007 } 1008 1009 common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width; 1010 /* Configure the default format information */ 1011 vpif_config_format(ch); 1012 1013 ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video, 1014 s_std_output, *std_id); 1015 if (ret < 0) { 1016 vpif_err("Failed to set output standard\n"); 1017 goto s_std_exit; 1018 } 1019 1020 ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core, 1021 s_std, *std_id); 1022 if (ret < 0) 1023 vpif_err("Failed to set standard for sub devices\n"); 1024 1025s_std_exit: 1026 mutex_unlock(&common->lock); 1027 return ret; 1028} 1029 1030static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std) 1031{ 1032 struct vpif_fh *fh = priv; 1033 struct channel_obj *ch = fh->channel; 1034 1035 *std = ch->video.stdid; 1036 return 0; 1037} 1038 1039static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p) 1040{ 1041 struct vpif_fh *fh = priv; 1042 struct channel_obj *ch = fh->channel; 1043 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1044 1045 return videobuf_dqbuf(&common->buffer_queue, p, 1046 (file->f_flags & O_NONBLOCK)); 1047} 1048 1049static int vpif_streamon(struct file *file, void *priv, 1050 enum v4l2_buf_type buftype) 1051{ 1052 struct vpif_fh *fh = priv; 1053 struct channel_obj *ch = fh->channel; 1054 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1055 struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id]; 1056 struct vpif_params *vpif = &ch->vpifparams; 1057 struct vpif_display_config *vpif_config_data = 1058 vpif_dev->platform_data; 1059 unsigned long addr = 0; 1060 int ret = 0; 1061 1062 if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1063 vpif_err("buffer type not supported\n"); 1064 return -EINVAL; 1065 } 1066 1067 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { 1068 vpif_err("fh->io_allowed\n"); 1069 return -EACCES; 1070 } 1071 1072 /* If Streaming is already started, return error */ 1073 if (common->started) { 1074 vpif_err("channel->started\n"); 1075 return -EBUSY; 1076 } 1077 1078 if ((ch->channel_id == VPIF_CHANNEL2_VIDEO 1079 && oth_ch->common[VPIF_VIDEO_INDEX].started && 1080 ch->vpifparams.std_info.ycmux_mode == 0) 1081 || ((ch->channel_id == VPIF_CHANNEL3_VIDEO) 1082 && (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) { 1083 vpif_err("other channel is using\n"); 1084 return -EBUSY; 1085 } 1086 1087 ret = vpif_check_format(ch, &common->fmt.fmt.pix); 1088 if (ret < 0) 1089 return ret; 1090 1091 /* Call videobuf_streamon to start streaming in videobuf */ 1092 ret = videobuf_streamon(&common->buffer_queue); 1093 if (ret < 0) { 1094 vpif_err("videobuf_streamon\n"); 1095 return ret; 1096 } 1097 1098 if (mutex_lock_interruptible(&common->lock)) 1099 return -ERESTARTSYS; 1100 1101 /* If buffer queue is empty, return error */ 1102 if (list_empty(&common->dma_queue)) { 1103 vpif_err("buffer queue is empty\n"); 1104 ret = -EIO; 1105 goto streamon_exit; 1106 } 1107 1108 /* Get the next frame from the buffer queue */ 1109 common->next_frm = common->cur_frm = 1110 list_entry(common->dma_queue.next, 1111 struct videobuf_buffer, queue); 1112 1113 list_del(&common->cur_frm->queue); 1114 /* Mark state of the current frame to active */ 1115 common->cur_frm->state = VIDEOBUF_ACTIVE; 1116 1117 /* Initialize field_id and started member */ 1118 ch->field_id = 0; 1119 common->started = 1; 1120 if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1121 addr = common->cur_frm->boff; 1122 /* Calculate the offset for Y and C data in the buffer */ 1123 vpif_calculate_offsets(ch); 1124 1125 if ((ch->vpifparams.std_info.frm_fmt && 1126 ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) 1127 && (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) 1128 || (!ch->vpifparams.std_info.frm_fmt 1129 && (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) { 1130 vpif_err("conflict in field format and std format\n"); 1131 ret = -EINVAL; 1132 goto streamon_exit; 1133 } 1134 1135 /* clock settings */ 1136 ret = 1137 vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode, 1138 ch->vpifparams.std_info.hd_sd); 1139 if (ret < 0) { 1140 vpif_err("can't set clock\n"); 1141 goto streamon_exit; 1142 } 1143 1144 /* set the parameters and addresses */ 1145 ret = vpif_set_video_params(vpif, ch->channel_id + 2); 1146 if (ret < 0) 1147 goto streamon_exit; 1148 1149 common->started = ret; 1150 vpif_config_addr(ch, ret); 1151 common->set_addr((addr + common->ytop_off), 1152 (addr + common->ybtm_off), 1153 (addr + common->ctop_off), 1154 (addr + common->cbtm_off)); 1155 1156 /* Set interrupt for both the fields in VPIF 1157 Register enable channel in VPIF register */ 1158 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) { 1159 channel2_intr_assert(); 1160 channel2_intr_enable(1); 1161 enable_channel2(1); 1162 } 1163 1164 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) 1165 || (common->started == 2)) { 1166 channel3_intr_assert(); 1167 channel3_intr_enable(1); 1168 enable_channel3(1); 1169 } 1170 channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1; 1171 } 1172 1173streamon_exit: 1174 mutex_unlock(&common->lock); 1175 return ret; 1176} 1177 1178static int vpif_streamoff(struct file *file, void *priv, 1179 enum v4l2_buf_type buftype) 1180{ 1181 struct vpif_fh *fh = priv; 1182 struct channel_obj *ch = fh->channel; 1183 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1184 1185 if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1186 vpif_err("buffer type not supported\n"); 1187 return -EINVAL; 1188 } 1189 1190 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { 1191 vpif_err("fh->io_allowed\n"); 1192 return -EACCES; 1193 } 1194 1195 if (!common->started) { 1196 vpif_err("channel->started\n"); 1197 return -EINVAL; 1198 } 1199 1200 if (mutex_lock_interruptible(&common->lock)) 1201 return -ERESTARTSYS; 1202 1203 if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1204 /* disable channel */ 1205 if (VPIF_CHANNEL2_VIDEO == ch->channel_id) { 1206 enable_channel2(0); 1207 channel2_intr_enable(0); 1208 } 1209 if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) || 1210 (2 == common->started)) { 1211 enable_channel3(0); 1212 channel3_intr_enable(0); 1213 } 1214 } 1215 1216 common->started = 0; 1217 mutex_unlock(&common->lock); 1218 1219 return videobuf_streamoff(&common->buffer_queue); 1220} 1221 1222static int vpif_cropcap(struct file *file, void *priv, 1223 struct v4l2_cropcap *crop) 1224{ 1225 struct vpif_fh *fh = priv; 1226 struct channel_obj *ch = fh->channel; 1227 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1228 if (V4L2_BUF_TYPE_VIDEO_OUTPUT != crop->type) 1229 return -EINVAL; 1230 1231 crop->bounds.left = crop->bounds.top = 0; 1232 crop->defrect.left = crop->defrect.top = 0; 1233 crop->defrect.height = crop->bounds.height = common->height; 1234 crop->defrect.width = crop->bounds.width = common->width; 1235 1236 return 0; 1237} 1238 1239static int vpif_enum_output(struct file *file, void *fh, 1240 struct v4l2_output *output) 1241{ 1242 1243 struct vpif_display_config *config = vpif_dev->platform_data; 1244 1245 if (output->index >= config->output_count) { 1246 vpif_dbg(1, debug, "Invalid output index\n"); 1247 return -EINVAL; 1248 } 1249 1250 strcpy(output->name, config->output[output->index]); 1251 output->type = V4L2_OUTPUT_TYPE_ANALOG; 1252 output->std = DM646X_V4L2_STD; 1253 1254 return 0; 1255} 1256 1257static int vpif_s_output(struct file *file, void *priv, unsigned int i) 1258{ 1259 struct vpif_fh *fh = priv; 1260 struct channel_obj *ch = fh->channel; 1261 struct video_obj *vid_ch = &ch->video; 1262 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1263 int ret = 0; 1264 1265 if (mutex_lock_interruptible(&common->lock)) 1266 return -ERESTARTSYS; 1267 1268 if (common->started) { 1269 vpif_err("Streaming in progress\n"); 1270 ret = -EBUSY; 1271 goto s_output_exit; 1272 } 1273 1274 ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video, 1275 s_routing, 0, i, 0); 1276 1277 if (ret < 0) 1278 vpif_err("Failed to set output standard\n"); 1279 1280 vid_ch->output_id = i; 1281 1282s_output_exit: 1283 mutex_unlock(&common->lock); 1284 return ret; 1285} 1286 1287static int vpif_g_output(struct file *file, void *priv, unsigned int *i) 1288{ 1289 struct vpif_fh *fh = priv; 1290 struct channel_obj *ch = fh->channel; 1291 struct video_obj *vid_ch = &ch->video; 1292 1293 *i = vid_ch->output_id; 1294 1295 return 0; 1296} 1297 1298static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p) 1299{ 1300 struct vpif_fh *fh = priv; 1301 struct channel_obj *ch = fh->channel; 1302 1303 *p = v4l2_prio_max(&ch->prio); 1304 1305 return 0; 1306} 1307 1308static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p) 1309{ 1310 struct vpif_fh *fh = priv; 1311 struct channel_obj *ch = fh->channel; 1312 1313 return v4l2_prio_change(&ch->prio, &fh->prio, p); 1314} 1315 1316/* vpif display ioctl operations */ 1317static const struct v4l2_ioctl_ops vpif_ioctl_ops = { 1318 .vidioc_querycap = vpif_querycap, 1319 .vidioc_g_priority = vpif_g_priority, 1320 .vidioc_s_priority = vpif_s_priority, 1321 .vidioc_enum_fmt_vid_out = vpif_enum_fmt_vid_out, 1322 .vidioc_g_fmt_vid_out = vpif_g_fmt_vid_out, 1323 .vidioc_s_fmt_vid_out = vpif_s_fmt_vid_out, 1324 .vidioc_try_fmt_vid_out = vpif_try_fmt_vid_out, 1325 .vidioc_reqbufs = vpif_reqbufs, 1326 .vidioc_querybuf = vpif_querybuf, 1327 .vidioc_qbuf = vpif_qbuf, 1328 .vidioc_dqbuf = vpif_dqbuf, 1329 .vidioc_streamon = vpif_streamon, 1330 .vidioc_streamoff = vpif_streamoff, 1331 .vidioc_s_std = vpif_s_std, 1332 .vidioc_g_std = vpif_g_std, 1333 .vidioc_enum_output = vpif_enum_output, 1334 .vidioc_s_output = vpif_s_output, 1335 .vidioc_g_output = vpif_g_output, 1336 .vidioc_cropcap = vpif_cropcap, 1337}; 1338 1339static const struct v4l2_file_operations vpif_fops = { 1340 .owner = THIS_MODULE, 1341 .open = vpif_open, 1342 .release = vpif_release, 1343 .ioctl = video_ioctl2, 1344 .mmap = vpif_mmap, 1345 .poll = vpif_poll 1346}; 1347 1348static struct video_device vpif_video_template = { 1349 .name = "vpif", 1350 .fops = &vpif_fops, 1351 .ioctl_ops = &vpif_ioctl_ops, 1352 .tvnorms = DM646X_V4L2_STD, 1353 .current_norm = V4L2_STD_625_50, 1354 1355}; 1356 1357/*Configure the channels, buffer sizei, request irq */ 1358static int initialize_vpif(void) 1359{ 1360 int free_channel_objects_index; 1361 int free_buffer_channel_index; 1362 int free_buffer_index; 1363 int err = 0, i, j; 1364 1365 /* Default number of buffers should be 3 */ 1366 if ((ch2_numbuffers > 0) && 1367 (ch2_numbuffers < config_params.min_numbuffers)) 1368 ch2_numbuffers = config_params.min_numbuffers; 1369 if ((ch3_numbuffers > 0) && 1370 (ch3_numbuffers < config_params.min_numbuffers)) 1371 ch3_numbuffers = config_params.min_numbuffers; 1372 1373 /* Set buffer size to min buffers size if invalid buffer size is 1374 * given */ 1375 if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO]) 1376 ch2_bufsize = 1377 config_params.min_bufsize[VPIF_CHANNEL2_VIDEO]; 1378 if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO]) 1379 ch3_bufsize = 1380 config_params.min_bufsize[VPIF_CHANNEL3_VIDEO]; 1381 1382 config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers; 1383 1384 if (ch2_numbuffers) { 1385 config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] = 1386 ch2_bufsize; 1387 } 1388 config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers; 1389 1390 if (ch3_numbuffers) { 1391 config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] = 1392 ch3_bufsize; 1393 } 1394 1395 /* Allocate memory for six channel objects */ 1396 for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) { 1397 vpif_obj.dev[i] = 1398 kmalloc(sizeof(struct channel_obj), GFP_KERNEL); 1399 /* If memory allocation fails, return error */ 1400 if (!vpif_obj.dev[i]) { 1401 free_channel_objects_index = i; 1402 err = -ENOMEM; 1403 goto vpif_init_free_channel_objects; 1404 } 1405 } 1406 1407 free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES; 1408 free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS; 1409 free_buffer_index = config_params.numbuffers[i - 1]; 1410 1411 return 0; 1412 1413vpif_init_free_channel_objects: 1414 for (j = 0; j < free_channel_objects_index; j++) 1415 kfree(vpif_obj.dev[j]); 1416 return err; 1417} 1418 1419/* 1420 * vpif_probe: This function creates device entries by register itself to the 1421 * V4L2 driver and initializes fields of each channel objects 1422 */ 1423static __init int vpif_probe(struct platform_device *pdev) 1424{ 1425 struct vpif_subdev_info *subdevdata; 1426 struct vpif_display_config *config; 1427 int i, j = 0, k, q, m, err = 0; 1428 struct i2c_adapter *i2c_adap; 1429 struct common_obj *common; 1430 struct channel_obj *ch; 1431 struct video_device *vfd; 1432 struct resource *res; 1433 int subdev_count; 1434 1435 vpif_dev = &pdev->dev; 1436 1437 err = initialize_vpif(); 1438 1439 if (err) { 1440 v4l2_err(vpif_dev->driver, "Error initializing vpif\n"); 1441 return err; 1442 } 1443 1444 err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev); 1445 if (err) { 1446 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n"); 1447 return err; 1448 } 1449 1450 k = 0; 1451 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) { 1452 for (i = res->start; i <= res->end; i++) { 1453 if (request_irq(i, vpif_channel_isr, IRQF_DISABLED, 1454 "DM646x_Display", 1455 (void *)(&vpif_obj.dev[k]->channel_id))) { 1456 err = -EBUSY; 1457 goto vpif_int_err; 1458 } 1459 } 1460 k++; 1461 } 1462 1463 for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) { 1464 1465 /* Get the pointer to the channel object */ 1466 ch = vpif_obj.dev[i]; 1467 1468 /* Allocate memory for video device */ 1469 vfd = video_device_alloc(); 1470 if (vfd == NULL) { 1471 for (j = 0; j < i; j++) { 1472 ch = vpif_obj.dev[j]; 1473 video_device_release(ch->video_dev); 1474 } 1475 err = -ENOMEM; 1476 goto vpif_int_err; 1477 } 1478 1479 /* Initialize field of video device */ 1480 *vfd = vpif_video_template; 1481 vfd->v4l2_dev = &vpif_obj.v4l2_dev; 1482 vfd->release = video_device_release; 1483 snprintf(vfd->name, sizeof(vfd->name), 1484 "DM646x_VPIFDisplay_DRIVER_V%d.%d.%d", 1485 (VPIF_DISPLAY_VERSION_CODE >> 16) & 0xff, 1486 (VPIF_DISPLAY_VERSION_CODE >> 8) & 0xff, 1487 (VPIF_DISPLAY_VERSION_CODE) & 0xff); 1488 1489 /* Set video_dev to the video device */ 1490 ch->video_dev = vfd; 1491 } 1492 1493 for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) { 1494 ch = vpif_obj.dev[j]; 1495 /* Initialize field of the channel objects */ 1496 atomic_set(&ch->usrs, 0); 1497 for (k = 0; k < VPIF_NUMOBJECTS; k++) { 1498 ch->common[k].numbuffers = 0; 1499 common = &ch->common[k]; 1500 common->io_usrs = 0; 1501 common->started = 0; 1502 spin_lock_init(&common->irqlock); 1503 mutex_init(&common->lock); 1504 common->numbuffers = 0; 1505 common->set_addr = NULL; 1506 common->ytop_off = common->ybtm_off = 0; 1507 common->ctop_off = common->cbtm_off = 0; 1508 common->cur_frm = common->next_frm = NULL; 1509 memset(&common->fmt, 0, sizeof(common->fmt)); 1510 common->numbuffers = config_params.numbuffers[k]; 1511 1512 } 1513 ch->initialized = 0; 1514 ch->channel_id = j; 1515 if (j < 2) 1516 ch->common[VPIF_VIDEO_INDEX].numbuffers = 1517 config_params.numbuffers[ch->channel_id]; 1518 else 1519 ch->common[VPIF_VIDEO_INDEX].numbuffers = 0; 1520 1521 memset(&ch->vpifparams, 0, sizeof(ch->vpifparams)); 1522 1523 /* Initialize prio member of channel object */ 1524 v4l2_prio_init(&ch->prio); 1525 ch->common[VPIF_VIDEO_INDEX].fmt.type = 1526 V4L2_BUF_TYPE_VIDEO_OUTPUT; 1527 1528 /* register video device */ 1529 vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n", 1530 (int)ch, (int)&ch->video_dev); 1531 1532 err = video_register_device(ch->video_dev, 1533 VFL_TYPE_GRABBER, (j ? 3 : 2)); 1534 if (err < 0) 1535 goto probe_out; 1536 1537 video_set_drvdata(ch->video_dev, ch); 1538 } 1539 1540 i2c_adap = i2c_get_adapter(1); 1541 config = pdev->dev.platform_data; 1542 subdev_count = config->subdev_count; 1543 subdevdata = config->subdevinfo; 1544 vpif_obj.sd = kmalloc(sizeof(struct v4l2_subdev *) * subdev_count, 1545 GFP_KERNEL); 1546 if (vpif_obj.sd == NULL) { 1547 vpif_err("unable to allocate memory for subdevice pointers\n"); 1548 err = -ENOMEM; 1549 goto probe_out; 1550 } 1551 1552 for (i = 0; i < subdev_count; i++) { 1553 vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev, 1554 i2c_adap, subdevdata[i].name, 1555 &subdevdata[i].board_info, 1556 NULL); 1557 if (!vpif_obj.sd[i]) { 1558 vpif_err("Error registering v4l2 subdevice\n"); 1559 goto probe_subdev_out; 1560 } 1561 1562 if (vpif_obj.sd[i]) 1563 vpif_obj.sd[i]->grp_id = 1 << i; 1564 } 1565 1566 return 0; 1567 1568probe_subdev_out: 1569 kfree(vpif_obj.sd); 1570probe_out: 1571 for (k = 0; k < j; k++) { 1572 ch = vpif_obj.dev[k]; 1573 video_unregister_device(ch->video_dev); 1574 video_device_release(ch->video_dev); 1575 ch->video_dev = NULL; 1576 } 1577vpif_int_err: 1578 v4l2_device_unregister(&vpif_obj.v4l2_dev); 1579 vpif_err("VPIF IRQ request failed\n"); 1580 for (q = k; k >= 0; k--) { 1581 for (m = i; m >= res->start; m--) 1582 free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id)); 1583 res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1); 1584 m = res->end; 1585 } 1586 1587 return err; 1588} 1589 1590/* 1591 * vpif_remove: It un-register channels from V4L2 driver 1592 */ 1593static int vpif_remove(struct platform_device *device) 1594{ 1595 struct channel_obj *ch; 1596 int i; 1597 1598 v4l2_device_unregister(&vpif_obj.v4l2_dev); 1599 1600 /* un-register device */ 1601 for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) { 1602 /* Get the pointer to the channel object */ 1603 ch = vpif_obj.dev[i]; 1604 /* Unregister video device */ 1605 video_unregister_device(ch->video_dev); 1606 1607 ch->video_dev = NULL; 1608 } 1609 1610 return 0; 1611} 1612 1613static struct platform_driver vpif_driver = { 1614 .driver = { 1615 .name = "vpif_display", 1616 .owner = THIS_MODULE, 1617 }, 1618 .probe = vpif_probe, 1619 .remove = vpif_remove, 1620}; 1621 1622static __init int vpif_init(void) 1623{ 1624 return platform_driver_register(&vpif_driver); 1625} 1626 1627/* 1628 * vpif_cleanup: This function un-registers device and driver to the kernel, 1629 * frees requested irq handler and de-allocates memory allocated for channel 1630 * objects. 1631 */ 1632static void vpif_cleanup(void) 1633{ 1634 struct platform_device *pdev; 1635 struct resource *res; 1636 int irq_num; 1637 int i = 0; 1638 1639 pdev = container_of(vpif_dev, struct platform_device, dev); 1640 1641 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) { 1642 for (irq_num = res->start; irq_num <= res->end; irq_num++) 1643 free_irq(irq_num, 1644 (void *)(&vpif_obj.dev[i]->channel_id)); 1645 i++; 1646 } 1647 1648 platform_driver_unregister(&vpif_driver); 1649 kfree(vpif_obj.sd); 1650 for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) 1651 kfree(vpif_obj.dev[i]); 1652} 1653 1654module_init(vpif_init); 1655module_exit(vpif_cleanup); 1656