1/* 2 * Copyright (C) 2009 Texas Instruments Inc 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 * 18 * TODO : add support for VBI & HBI data service 19 * add static buffer allocation 20 */ 21#include <linux/kernel.h> 22#include <linux/init.h> 23#include <linux/module.h> 24#include <linux/errno.h> 25#include <linux/fs.h> 26#include <linux/mm.h> 27#include <linux/interrupt.h> 28#include <linux/workqueue.h> 29#include <linux/string.h> 30#include <linux/videodev2.h> 31#include <linux/wait.h> 32#include <linux/time.h> 33#include <linux/i2c.h> 34#include <linux/platform_device.h> 35#include <linux/io.h> 36#include <linux/version.h> 37#include <linux/slab.h> 38#include <media/v4l2-device.h> 39#include <media/v4l2-ioctl.h> 40 41#include "vpif_capture.h" 42#include "vpif.h" 43 44MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver"); 45MODULE_LICENSE("GPL"); 46 47#define vpif_err(fmt, arg...) v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg) 48#define vpif_dbg(level, debug, fmt, arg...) \ 49 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg) 50 51static int debug = 1; 52static u32 ch0_numbuffers = 3; 53static u32 ch1_numbuffers = 3; 54static u32 ch0_bufsize = 1920 * 1080 * 2; 55static u32 ch1_bufsize = 720 * 576 * 2; 56 57module_param(debug, int, 0644); 58module_param(ch0_numbuffers, uint, S_IRUGO); 59module_param(ch1_numbuffers, uint, S_IRUGO); 60module_param(ch0_bufsize, uint, S_IRUGO); 61module_param(ch1_bufsize, uint, S_IRUGO); 62 63MODULE_PARM_DESC(debug, "Debug level 0-1"); 64MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)"); 65MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)"); 66MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)"); 67MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)"); 68 69static struct vpif_config_params config_params = { 70 .min_numbuffers = 3, 71 .numbuffers[0] = 3, 72 .numbuffers[1] = 3, 73 .min_bufsize[0] = 720 * 480 * 2, 74 .min_bufsize[1] = 720 * 480 * 2, 75 .channel_bufsize[0] = 1920 * 1080 * 2, 76 .channel_bufsize[1] = 720 * 576 * 2, 77}; 78 79/* global variables */ 80static struct vpif_device vpif_obj = { {NULL} }; 81static struct device *vpif_dev; 82 83/** 84 * ch_params: video standard configuration parameters for vpif 85 */ 86static const struct vpif_channel_config_params ch_params[] = { 87 { 88 "NTSC_M", 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_BDGHIK", 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 : translate user/virtual address to phy address 99 * @virtp: user/virtual address 100 * 101 * This inline function is used to convert user space virtual address to 102 * physical address. 103 */ 104static inline u32 vpif_uservirt_to_phys(u32 virtp) 105{ 106 unsigned long physp = 0; 107 struct mm_struct *mm = current->mm; 108 struct vm_area_struct *vma; 109 110 vma = find_vma(mm, virtp); 111 112 /* For kernel direct-mapped memory, take the easy way */ 113 if (virtp >= PAGE_OFFSET) 114 physp = virt_to_phys((void *)virtp); 115 else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) 116 /** 117 * this will catch, kernel-allocated, mmaped-to-usermode 118 * addresses 119 */ 120 physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start); 121 else { 122 /* otherwise, use get_user_pages() for general userland pages */ 123 int res, nr_pages = 1; 124 struct page *pages; 125 126 down_read(¤t->mm->mmap_sem); 127 128 res = get_user_pages(current, current->mm, 129 virtp, nr_pages, 1, 0, &pages, NULL); 130 up_read(¤t->mm->mmap_sem); 131 132 if (res == nr_pages) 133 physp = __pa(page_address(&pages[0]) + 134 (virtp & ~PAGE_MASK)); 135 else { 136 vpif_err("get_user_pages failed\n"); 137 return 0; 138 } 139 } 140 return physp; 141} 142 143/** 144 * buffer_prepare : callback function for buffer prepare 145 * @q : buffer queue ptr 146 * @vb: ptr to video buffer 147 * @field: field info 148 * 149 * This is the callback function for buffer prepare when videobuf_qbuf() 150 * function is called. The buffer is prepared and user space virtual address 151 * or user address is converted into physical address 152 */ 153static int vpif_buffer_prepare(struct videobuf_queue *q, 154 struct videobuf_buffer *vb, 155 enum v4l2_field field) 156{ 157 /* Get the file handle object and channel object */ 158 struct vpif_fh *fh = q->priv_data; 159 struct channel_obj *ch = fh->channel; 160 struct common_obj *common; 161 unsigned long addr; 162 163 164 vpif_dbg(2, debug, "vpif_buffer_prepare\n"); 165 166 common = &ch->common[VPIF_VIDEO_INDEX]; 167 168 /* If buffer is not initialized, initialize it */ 169 if (VIDEOBUF_NEEDS_INIT == vb->state) { 170 vb->width = common->width; 171 vb->height = common->height; 172 vb->size = vb->width * vb->height; 173 vb->field = field; 174 } 175 vb->state = VIDEOBUF_PREPARED; 176 /** 177 * if user pointer memory mechanism is used, get the physical 178 * address of the buffer 179 */ 180 if (V4L2_MEMORY_USERPTR == common->memory) { 181 if (0 == vb->baddr) { 182 vpif_dbg(1, debug, "buffer address is 0\n"); 183 return -EINVAL; 184 185 } 186 vb->boff = vpif_uservirt_to_phys(vb->baddr); 187 if (!IS_ALIGNED(vb->boff, 8)) 188 goto exit; 189 } 190 191 addr = vb->boff; 192 if (q->streaming) { 193 if (!IS_ALIGNED((addr + common->ytop_off), 8) || 194 !IS_ALIGNED((addr + common->ybtm_off), 8) || 195 !IS_ALIGNED((addr + common->ctop_off), 8) || 196 !IS_ALIGNED((addr + common->cbtm_off), 8)) 197 goto exit; 198 } 199 return 0; 200exit: 201 vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n"); 202 return -EINVAL; 203} 204 205/** 206 * vpif_buffer_setup : Callback function for buffer setup. 207 * @q: buffer queue ptr 208 * @count: number of buffers 209 * @size: size of the buffer 210 * 211 * This callback function is called when reqbuf() is called to adjust 212 * the buffer count and buffer size 213 */ 214static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count, 215 unsigned int *size) 216{ 217 /* Get the file handle object and channel object */ 218 struct vpif_fh *fh = q->priv_data; 219 struct channel_obj *ch = fh->channel; 220 struct common_obj *common; 221 222 common = &ch->common[VPIF_VIDEO_INDEX]; 223 224 vpif_dbg(2, debug, "vpif_buffer_setup\n"); 225 226 /* If memory type is not mmap, return */ 227 if (V4L2_MEMORY_MMAP != common->memory) 228 return 0; 229 230 /* Calculate the size of the buffer */ 231 *size = config_params.channel_bufsize[ch->channel_id]; 232 233 if (*count < config_params.min_numbuffers) 234 *count = config_params.min_numbuffers; 235 return 0; 236} 237 238/** 239 * vpif_buffer_queue : Callback function to add buffer to DMA queue 240 * @q: ptr to videobuf_queue 241 * @vb: ptr to videobuf_buffer 242 */ 243static void vpif_buffer_queue(struct videobuf_queue *q, 244 struct videobuf_buffer *vb) 245{ 246 /* Get the file handle object and channel object */ 247 struct vpif_fh *fh = q->priv_data; 248 struct channel_obj *ch = fh->channel; 249 struct common_obj *common; 250 251 common = &ch->common[VPIF_VIDEO_INDEX]; 252 253 vpif_dbg(2, debug, "vpif_buffer_queue\n"); 254 255 /* add the buffer to the DMA queue */ 256 list_add_tail(&vb->queue, &common->dma_queue); 257 /* Change state of the buffer */ 258 vb->state = VIDEOBUF_QUEUED; 259} 260 261/** 262 * vpif_buffer_release : Callback function to free buffer 263 * @q: buffer queue ptr 264 * @vb: ptr to video buffer 265 * 266 * This function is called from the videobuf layer to free memory 267 * allocated to the buffers 268 */ 269static void vpif_buffer_release(struct videobuf_queue *q, 270 struct videobuf_buffer *vb) 271{ 272 /* Get the file handle object and channel object */ 273 struct vpif_fh *fh = q->priv_data; 274 struct channel_obj *ch = fh->channel; 275 struct common_obj *common; 276 277 common = &ch->common[VPIF_VIDEO_INDEX]; 278 279 videobuf_dma_contig_free(q, vb); 280 vb->state = VIDEOBUF_NEEDS_INIT; 281} 282 283static struct videobuf_queue_ops video_qops = { 284 .buf_setup = vpif_buffer_setup, 285 .buf_prepare = vpif_buffer_prepare, 286 .buf_queue = vpif_buffer_queue, 287 .buf_release = vpif_buffer_release, 288}; 289 290static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] = 291 { {1, 1} }; 292 293/** 294 * vpif_process_buffer_complete: process a completed buffer 295 * @common: ptr to common channel object 296 * 297 * This function time stamp the buffer and mark it as DONE. It also 298 * wake up any process waiting on the QUEUE and set the next buffer 299 * as current 300 */ 301static void vpif_process_buffer_complete(struct common_obj *common) 302{ 303 do_gettimeofday(&common->cur_frm->ts); 304 common->cur_frm->state = VIDEOBUF_DONE; 305 wake_up_interruptible(&common->cur_frm->done); 306 /* Make curFrm pointing to nextFrm */ 307 common->cur_frm = common->next_frm; 308} 309 310/** 311 * vpif_schedule_next_buffer: set next buffer address for capture 312 * @common : ptr to common channel object 313 * 314 * This function will get next buffer from the dma queue and 315 * set the buffer address in the vpif register for capture. 316 * the buffer is marked active 317 */ 318static void vpif_schedule_next_buffer(struct common_obj *common) 319{ 320 unsigned long addr = 0; 321 322 common->next_frm = list_entry(common->dma_queue.next, 323 struct videobuf_buffer, queue); 324 /* Remove that buffer from the buffer queue */ 325 list_del(&common->next_frm->queue); 326 common->next_frm->state = VIDEOBUF_ACTIVE; 327 if (V4L2_MEMORY_USERPTR == common->memory) 328 addr = common->next_frm->boff; 329 else 330 addr = videobuf_to_dma_contig(common->next_frm); 331 332 /* Set top and bottom field addresses in VPIF registers */ 333 common->set_addr(addr + common->ytop_off, 334 addr + common->ybtm_off, 335 addr + common->ctop_off, 336 addr + common->cbtm_off); 337} 338 339/** 340 * vpif_channel_isr : ISR handler for vpif capture 341 * @irq: irq number 342 * @dev_id: dev_id ptr 343 * 344 * It changes status of the captured buffer, takes next buffer from the queue 345 * and sets its address in VPIF registers 346 */ 347static irqreturn_t vpif_channel_isr(int irq, void *dev_id) 348{ 349 struct vpif_device *dev = &vpif_obj; 350 struct common_obj *common; 351 struct channel_obj *ch; 352 enum v4l2_field field; 353 int channel_id = 0; 354 int fid = -1, i; 355 356 channel_id = *(int *)(dev_id); 357 ch = dev->dev[channel_id]; 358 359 field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field; 360 361 for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) { 362 common = &ch->common[i]; 363 /* skip If streaming is not started in this channel */ 364 if (0 == common->started) 365 continue; 366 367 /* Check the field format */ 368 if (1 == ch->vpifparams.std_info.frm_fmt) { 369 /* Progressive mode */ 370 if (list_empty(&common->dma_queue)) 371 continue; 372 373 if (!channel_first_int[i][channel_id]) 374 vpif_process_buffer_complete(common); 375 376 channel_first_int[i][channel_id] = 0; 377 378 vpif_schedule_next_buffer(common); 379 380 381 channel_first_int[i][channel_id] = 0; 382 } else { 383 /** 384 * Interlaced mode. If it is first interrupt, ignore 385 * it 386 */ 387 if (channel_first_int[i][channel_id]) { 388 channel_first_int[i][channel_id] = 0; 389 continue; 390 } 391 if (0 == i) { 392 ch->field_id ^= 1; 393 /* Get field id from VPIF registers */ 394 fid = vpif_channel_getfid(ch->channel_id); 395 if (fid != ch->field_id) { 396 /** 397 * If field id does not match stored 398 * field id, make them in sync 399 */ 400 if (0 == fid) 401 ch->field_id = fid; 402 return IRQ_HANDLED; 403 } 404 } 405 /* device field id and local field id are in sync */ 406 if (0 == fid) { 407 /* this is even field */ 408 if (common->cur_frm == common->next_frm) 409 continue; 410 411 /* mark the current buffer as done */ 412 vpif_process_buffer_complete(common); 413 } else if (1 == fid) { 414 /* odd field */ 415 if (list_empty(&common->dma_queue) || 416 (common->cur_frm != common->next_frm)) 417 continue; 418 419 vpif_schedule_next_buffer(common); 420 } 421 } 422 } 423 return IRQ_HANDLED; 424} 425 426/** 427 * vpif_update_std_info() - update standard related info 428 * @ch: ptr to channel object 429 * 430 * For a given standard selected by application, update values 431 * in the device data structures 432 */ 433static int vpif_update_std_info(struct channel_obj *ch) 434{ 435 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 436 struct vpif_params *vpifparams = &ch->vpifparams; 437 const struct vpif_channel_config_params *config; 438 struct vpif_channel_config_params *std_info; 439 struct video_obj *vid_ch = &ch->video; 440 int index; 441 442 vpif_dbg(2, debug, "vpif_update_std_info\n"); 443 444 std_info = &vpifparams->std_info; 445 446 for (index = 0; index < ARRAY_SIZE(ch_params); index++) { 447 config = &ch_params[index]; 448 if (config->stdid & vid_ch->stdid) { 449 memcpy(std_info, config, sizeof(*config)); 450 break; 451 } 452 } 453 454 /* standard not found */ 455 if (index == ARRAY_SIZE(ch_params)) 456 return -EINVAL; 457 458 common->fmt.fmt.pix.width = std_info->width; 459 common->width = std_info->width; 460 common->fmt.fmt.pix.height = std_info->height; 461 common->height = std_info->height; 462 common->fmt.fmt.pix.bytesperline = std_info->width; 463 vpifparams->video_params.hpitch = std_info->width; 464 vpifparams->video_params.storage_mode = std_info->frm_fmt; 465 return 0; 466} 467 468/** 469 * vpif_calculate_offsets : This function calculates buffers offsets 470 * @ch : ptr to channel object 471 * 472 * This function calculates buffer offsets for Y and C in the top and 473 * bottom field 474 */ 475static void vpif_calculate_offsets(struct channel_obj *ch) 476{ 477 unsigned int hpitch, vpitch, sizeimage; 478 struct video_obj *vid_ch = &(ch->video); 479 struct vpif_params *vpifparams = &ch->vpifparams; 480 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 481 enum v4l2_field field = common->fmt.fmt.pix.field; 482 483 vpif_dbg(2, debug, "vpif_calculate_offsets\n"); 484 485 if (V4L2_FIELD_ANY == field) { 486 if (vpifparams->std_info.frm_fmt) 487 vid_ch->buf_field = V4L2_FIELD_NONE; 488 else 489 vid_ch->buf_field = V4L2_FIELD_INTERLACED; 490 } else 491 vid_ch->buf_field = common->fmt.fmt.pix.field; 492 493 if (V4L2_MEMORY_USERPTR == common->memory) 494 sizeimage = common->fmt.fmt.pix.sizeimage; 495 else 496 sizeimage = config_params.channel_bufsize[ch->channel_id]; 497 498 hpitch = common->fmt.fmt.pix.bytesperline; 499 vpitch = sizeimage / (hpitch * 2); 500 501 if ((V4L2_FIELD_NONE == vid_ch->buf_field) || 502 (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) { 503 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */ 504 common->ytop_off = 0; 505 common->ybtm_off = hpitch; 506 common->ctop_off = sizeimage / 2; 507 common->cbtm_off = sizeimage / 2 + hpitch; 508 } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) { 509 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */ 510 common->ytop_off = 0; 511 common->ybtm_off = sizeimage / 4; 512 common->ctop_off = sizeimage / 2; 513 common->cbtm_off = common->ctop_off + sizeimage / 4; 514 } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) { 515 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */ 516 common->ybtm_off = 0; 517 common->ytop_off = sizeimage / 4; 518 common->cbtm_off = sizeimage / 2; 519 common->ctop_off = common->cbtm_off + sizeimage / 4; 520 } 521 if ((V4L2_FIELD_NONE == vid_ch->buf_field) || 522 (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) 523 vpifparams->video_params.storage_mode = 1; 524 else 525 vpifparams->video_params.storage_mode = 0; 526 527 if (1 == vpifparams->std_info.frm_fmt) 528 vpifparams->video_params.hpitch = 529 common->fmt.fmt.pix.bytesperline; 530 else { 531 if ((field == V4L2_FIELD_ANY) 532 || (field == V4L2_FIELD_INTERLACED)) 533 vpifparams->video_params.hpitch = 534 common->fmt.fmt.pix.bytesperline * 2; 535 else 536 vpifparams->video_params.hpitch = 537 common->fmt.fmt.pix.bytesperline; 538 } 539 540 ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid; 541} 542 543/** 544 * vpif_config_format: configure default frame format in the device 545 * ch : ptr to channel object 546 */ 547static void vpif_config_format(struct channel_obj *ch) 548{ 549 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 550 551 vpif_dbg(2, debug, "vpif_config_format\n"); 552 553 common->fmt.fmt.pix.field = V4L2_FIELD_ANY; 554 if (config_params.numbuffers[ch->channel_id] == 0) 555 common->memory = V4L2_MEMORY_USERPTR; 556 else 557 common->memory = V4L2_MEMORY_MMAP; 558 559 common->fmt.fmt.pix.sizeimage 560 = config_params.channel_bufsize[ch->channel_id]; 561 562 if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) 563 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8; 564 else 565 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P; 566 common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 567} 568 569/** 570 * vpif_get_default_field() - Get default field type based on interface 571 * @vpif_params - ptr to vpif params 572 */ 573static inline enum v4l2_field vpif_get_default_field( 574 struct vpif_interface *iface) 575{ 576 return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE : 577 V4L2_FIELD_INTERLACED; 578} 579 580/** 581 * vpif_check_format() - check given pixel format for compatibility 582 * @ch - channel ptr 583 * @pixfmt - Given pixel format 584 * @update - update the values as per hardware requirement 585 * 586 * Check the application pixel format for S_FMT and update the input 587 * values as per hardware limits for TRY_FMT. The default pixel and 588 * field format is selected based on interface type. 589 */ 590static int vpif_check_format(struct channel_obj *ch, 591 struct v4l2_pix_format *pixfmt, 592 int update) 593{ 594 struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]); 595 struct vpif_params *vpif_params = &ch->vpifparams; 596 enum v4l2_field field = pixfmt->field; 597 u32 sizeimage, hpitch, vpitch; 598 int ret = -EINVAL; 599 600 vpif_dbg(2, debug, "vpif_check_format\n"); 601 /** 602 * first check for the pixel format. If if_type is Raw bayer, 603 * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only 604 * V4L2_PIX_FMT_YUV422P is supported 605 */ 606 if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) { 607 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) { 608 if (!update) { 609 vpif_dbg(2, debug, "invalid pix format\n"); 610 goto exit; 611 } 612 pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8; 613 } 614 } else { 615 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) { 616 if (!update) { 617 vpif_dbg(2, debug, "invalid pixel format\n"); 618 goto exit; 619 } 620 pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P; 621 } 622 } 623 624 if (!(VPIF_VALID_FIELD(field))) { 625 if (!update) { 626 vpif_dbg(2, debug, "invalid field format\n"); 627 goto exit; 628 } 629 /** 630 * By default use FIELD_NONE for RAW Bayer capture 631 * and FIELD_INTERLACED for other interfaces 632 */ 633 field = vpif_get_default_field(&vpif_params->iface); 634 } else if (field == V4L2_FIELD_ANY) 635 /* unsupported field. Use default */ 636 field = vpif_get_default_field(&vpif_params->iface); 637 638 /* validate the hpitch */ 639 hpitch = pixfmt->bytesperline; 640 if (hpitch < vpif_params->std_info.width) { 641 if (!update) { 642 vpif_dbg(2, debug, "invalid hpitch\n"); 643 goto exit; 644 } 645 hpitch = vpif_params->std_info.width; 646 } 647 648 if (V4L2_MEMORY_USERPTR == common->memory) 649 sizeimage = pixfmt->sizeimage; 650 else 651 sizeimage = config_params.channel_bufsize[ch->channel_id]; 652 653 vpitch = sizeimage / (hpitch * 2); 654 655 /* validate the vpitch */ 656 if (vpitch < vpif_params->std_info.height) { 657 if (!update) { 658 vpif_dbg(2, debug, "Invalid vpitch\n"); 659 goto exit; 660 } 661 vpitch = vpif_params->std_info.height; 662 } 663 664 /* Check for 8 byte alignment */ 665 if (!ALIGN(hpitch, 8)) { 666 if (!update) { 667 vpif_dbg(2, debug, "invalid pitch alignment\n"); 668 goto exit; 669 } 670 /* adjust to next 8 byte boundary */ 671 hpitch = (((hpitch + 7) / 8) * 8); 672 } 673 /* if update is set, modify the bytesperline and sizeimage */ 674 if (update) { 675 pixfmt->bytesperline = hpitch; 676 pixfmt->sizeimage = hpitch * vpitch * 2; 677 } 678 /** 679 * Image width and height is always based on current standard width and 680 * height 681 */ 682 pixfmt->width = common->fmt.fmt.pix.width; 683 pixfmt->height = common->fmt.fmt.pix.height; 684 return 0; 685exit: 686 return ret; 687} 688 689/** 690 * vpif_config_addr() - function to configure buffer address in vpif 691 * @ch - channel ptr 692 * @muxmode - channel mux mode 693 */ 694static void vpif_config_addr(struct channel_obj *ch, int muxmode) 695{ 696 struct common_obj *common; 697 698 vpif_dbg(2, debug, "vpif_config_addr\n"); 699 700 common = &(ch->common[VPIF_VIDEO_INDEX]); 701 702 if (VPIF_CHANNEL1_VIDEO == ch->channel_id) 703 common->set_addr = ch1_set_videobuf_addr; 704 else if (2 == muxmode) 705 common->set_addr = ch0_set_videobuf_addr_yc_nmux; 706 else 707 common->set_addr = ch0_set_videobuf_addr; 708} 709 710/** 711 * vpfe_mmap : It is used to map kernel space buffers into user spaces 712 * @filep: file pointer 713 * @vma: ptr to vm_area_struct 714 */ 715static int vpif_mmap(struct file *filep, struct vm_area_struct *vma) 716{ 717 /* Get the channel object and file handle object */ 718 struct vpif_fh *fh = filep->private_data; 719 struct channel_obj *ch = fh->channel; 720 struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]); 721 722 vpif_dbg(2, debug, "vpif_mmap\n"); 723 724 return videobuf_mmap_mapper(&common->buffer_queue, vma); 725} 726 727/** 728 * vpif_poll: It is used for select/poll system call 729 * @filep: file pointer 730 * @wait: poll table to wait 731 */ 732static unsigned int vpif_poll(struct file *filep, poll_table * wait) 733{ 734 int err = 0; 735 struct vpif_fh *fh = filep->private_data; 736 struct channel_obj *channel = fh->channel; 737 struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]); 738 739 vpif_dbg(2, debug, "vpif_poll\n"); 740 741 if (common->started) 742 err = videobuf_poll_stream(filep, &common->buffer_queue, wait); 743 744 return 0; 745} 746 747/** 748 * vpif_open : vpif open handler 749 * @filep: file ptr 750 * 751 * It creates object of file handle structure and stores it in private_data 752 * member of filepointer 753 */ 754static int vpif_open(struct file *filep) 755{ 756 struct vpif_capture_config *config = vpif_dev->platform_data; 757 struct video_device *vdev = video_devdata(filep); 758 struct common_obj *common; 759 struct video_obj *vid_ch; 760 struct channel_obj *ch; 761 struct vpif_fh *fh; 762 int i, ret = 0; 763 764 vpif_dbg(2, debug, "vpif_open\n"); 765 766 ch = video_get_drvdata(vdev); 767 768 vid_ch = &ch->video; 769 common = &ch->common[VPIF_VIDEO_INDEX]; 770 771 if (mutex_lock_interruptible(&common->lock)) 772 return -ERESTARTSYS; 773 774 if (NULL == ch->curr_subdev_info) { 775 /** 776 * search through the sub device to see a registered 777 * sub device and make it as current sub device 778 */ 779 for (i = 0; i < config->subdev_count; i++) { 780 if (vpif_obj.sd[i]) { 781 /* the sub device is registered */ 782 ch->curr_subdev_info = &config->subdev_info[i]; 783 /* make first input as the current input */ 784 vid_ch->input_idx = 0; 785 break; 786 } 787 } 788 if (i == config->subdev_count) { 789 vpif_err("No sub device registered\n"); 790 ret = -ENOENT; 791 goto exit; 792 } 793 } 794 795 /* Allocate memory for the file handle object */ 796 fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL); 797 if (NULL == fh) { 798 vpif_err("unable to allocate memory for file handle object\n"); 799 ret = -ENOMEM; 800 goto exit; 801 } 802 803 /* store pointer to fh in private_data member of filep */ 804 filep->private_data = fh; 805 fh->channel = ch; 806 fh->initialized = 0; 807 /* If decoder is not initialized. initialize it */ 808 if (!ch->initialized) { 809 fh->initialized = 1; 810 ch->initialized = 1; 811 memset(&(ch->vpifparams), 0, sizeof(struct vpif_params)); 812 } 813 /* Increment channel usrs counter */ 814 ch->usrs++; 815 /* Set io_allowed member to false */ 816 fh->io_allowed[VPIF_VIDEO_INDEX] = 0; 817 /* Initialize priority of this instance to default priority */ 818 fh->prio = V4L2_PRIORITY_UNSET; 819 v4l2_prio_open(&ch->prio, &fh->prio); 820exit: 821 mutex_unlock(&common->lock); 822 return ret; 823} 824 825/** 826 * vpif_release : function to clean up file close 827 * @filep: file pointer 828 * 829 * This function deletes buffer queue, frees the buffers and the vpfe file 830 * handle 831 */ 832static int vpif_release(struct file *filep) 833{ 834 struct vpif_fh *fh = filep->private_data; 835 struct channel_obj *ch = fh->channel; 836 struct common_obj *common; 837 838 vpif_dbg(2, debug, "vpif_release\n"); 839 840 common = &ch->common[VPIF_VIDEO_INDEX]; 841 842 if (mutex_lock_interruptible(&common->lock)) 843 return -ERESTARTSYS; 844 845 /* if this instance is doing IO */ 846 if (fh->io_allowed[VPIF_VIDEO_INDEX]) { 847 /* Reset io_usrs member of channel object */ 848 common->io_usrs = 0; 849 /* Disable channel as per its device type and channel id */ 850 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) { 851 enable_channel0(0); 852 channel0_intr_enable(0); 853 } 854 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) || 855 (2 == common->started)) { 856 enable_channel1(0); 857 channel1_intr_enable(0); 858 } 859 common->started = 0; 860 /* Free buffers allocated */ 861 videobuf_queue_cancel(&common->buffer_queue); 862 videobuf_mmap_free(&common->buffer_queue); 863 } 864 865 /* Decrement channel usrs counter */ 866 ch->usrs--; 867 868 /* unlock mutex on channel object */ 869 mutex_unlock(&common->lock); 870 871 /* Close the priority */ 872 v4l2_prio_close(&ch->prio, fh->prio); 873 874 if (fh->initialized) 875 ch->initialized = 0; 876 877 filep->private_data = NULL; 878 kfree(fh); 879 return 0; 880} 881 882/** 883 * vpif_reqbufs() - request buffer handler 884 * @file: file ptr 885 * @priv: file handle 886 * @reqbuf: request buffer structure ptr 887 */ 888static int vpif_reqbufs(struct file *file, void *priv, 889 struct v4l2_requestbuffers *reqbuf) 890{ 891 struct vpif_fh *fh = priv; 892 struct channel_obj *ch = fh->channel; 893 struct common_obj *common; 894 u8 index = 0; 895 int ret = 0; 896 897 vpif_dbg(2, debug, "vpif_reqbufs\n"); 898 899 /** 900 * This file handle has not initialized the channel, 901 * It is not allowed to do settings 902 */ 903 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) 904 || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { 905 if (!fh->initialized) { 906 vpif_dbg(1, debug, "Channel Busy\n"); 907 return -EBUSY; 908 } 909 } 910 911 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type) 912 return -EINVAL; 913 914 index = VPIF_VIDEO_INDEX; 915 916 common = &ch->common[index]; 917 918 if (mutex_lock_interruptible(&common->lock)) 919 return -ERESTARTSYS; 920 921 if (0 != common->io_usrs) { 922 ret = -EBUSY; 923 goto reqbuf_exit; 924 } 925 926 /* Initialize videobuf queue as per the buffer type */ 927 videobuf_queue_dma_contig_init(&common->buffer_queue, 928 &video_qops, NULL, 929 &common->irqlock, 930 reqbuf->type, 931 common->fmt.fmt.pix.field, 932 sizeof(struct videobuf_buffer), fh); 933 934 /* Set io allowed member of file handle to TRUE */ 935 fh->io_allowed[index] = 1; 936 /* Increment io usrs member of channel object to 1 */ 937 common->io_usrs = 1; 938 /* Store type of memory requested in channel object */ 939 common->memory = reqbuf->memory; 940 INIT_LIST_HEAD(&common->dma_queue); 941 942 /* Allocate buffers */ 943 ret = videobuf_reqbufs(&common->buffer_queue, reqbuf); 944 945reqbuf_exit: 946 mutex_unlock(&common->lock); 947 return ret; 948} 949 950/** 951 * vpif_querybuf() - query buffer handler 952 * @file: file ptr 953 * @priv: file handle 954 * @buf: v4l2 buffer structure ptr 955 */ 956static int vpif_querybuf(struct file *file, void *priv, 957 struct v4l2_buffer *buf) 958{ 959 struct vpif_fh *fh = priv; 960 struct channel_obj *ch = fh->channel; 961 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 962 963 vpif_dbg(2, debug, "vpif_querybuf\n"); 964 965 if (common->fmt.type != buf->type) 966 return -EINVAL; 967 968 if (common->memory != V4L2_MEMORY_MMAP) { 969 vpif_dbg(1, debug, "Invalid memory\n"); 970 return -EINVAL; 971 } 972 973 return videobuf_querybuf(&common->buffer_queue, buf); 974} 975 976/** 977 * vpif_qbuf() - query buffer handler 978 * @file: file ptr 979 * @priv: file handle 980 * @buf: v4l2 buffer structure ptr 981 */ 982static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 983{ 984 985 struct vpif_fh *fh = priv; 986 struct channel_obj *ch = fh->channel; 987 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 988 struct v4l2_buffer tbuf = *buf; 989 struct videobuf_buffer *buf1; 990 unsigned long addr = 0; 991 unsigned long flags; 992 int ret = 0; 993 994 vpif_dbg(2, debug, "vpif_qbuf\n"); 995 996 if (common->fmt.type != tbuf.type) { 997 vpif_err("invalid buffer type\n"); 998 return -EINVAL; 999 } 1000 1001 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { 1002 vpif_err("fh io not allowed \n"); 1003 return -EACCES; 1004 } 1005 1006 if (!(list_empty(&common->dma_queue)) || 1007 (common->cur_frm != common->next_frm) || 1008 !common->started || 1009 (common->started && (0 == ch->field_id))) 1010 return videobuf_qbuf(&common->buffer_queue, buf); 1011 1012 /* bufferqueue is empty store buffer address in VPIF registers */ 1013 mutex_lock(&common->buffer_queue.vb_lock); 1014 buf1 = common->buffer_queue.bufs[tbuf.index]; 1015 1016 if ((buf1->state == VIDEOBUF_QUEUED) || 1017 (buf1->state == VIDEOBUF_ACTIVE)) { 1018 vpif_err("invalid state\n"); 1019 goto qbuf_exit; 1020 } 1021 1022 switch (buf1->memory) { 1023 case V4L2_MEMORY_MMAP: 1024 if (buf1->baddr == 0) 1025 goto qbuf_exit; 1026 break; 1027 1028 case V4L2_MEMORY_USERPTR: 1029 if (tbuf.length < buf1->bsize) 1030 goto qbuf_exit; 1031 1032 if ((VIDEOBUF_NEEDS_INIT != buf1->state) 1033 && (buf1->baddr != tbuf.m.userptr)) 1034 vpif_buffer_release(&common->buffer_queue, buf1); 1035 buf1->baddr = tbuf.m.userptr; 1036 break; 1037 1038 default: 1039 goto qbuf_exit; 1040 } 1041 1042 local_irq_save(flags); 1043 ret = vpif_buffer_prepare(&common->buffer_queue, buf1, 1044 common->buffer_queue.field); 1045 if (ret < 0) { 1046 local_irq_restore(flags); 1047 goto qbuf_exit; 1048 } 1049 1050 buf1->state = VIDEOBUF_ACTIVE; 1051 1052 if (V4L2_MEMORY_USERPTR == common->memory) 1053 addr = buf1->boff; 1054 else 1055 addr = videobuf_to_dma_contig(buf1); 1056 1057 common->next_frm = buf1; 1058 common->set_addr(addr + common->ytop_off, 1059 addr + common->ybtm_off, 1060 addr + common->ctop_off, 1061 addr + common->cbtm_off); 1062 1063 local_irq_restore(flags); 1064 list_add_tail(&buf1->stream, &common->buffer_queue.stream); 1065 mutex_unlock(&common->buffer_queue.vb_lock); 1066 return 0; 1067 1068qbuf_exit: 1069 mutex_unlock(&common->buffer_queue.vb_lock); 1070 return -EINVAL; 1071} 1072 1073/** 1074 * vpif_dqbuf() - query buffer handler 1075 * @file: file ptr 1076 * @priv: file handle 1077 * @buf: v4l2 buffer structure ptr 1078 */ 1079static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 1080{ 1081 struct vpif_fh *fh = priv; 1082 struct channel_obj *ch = fh->channel; 1083 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1084 1085 vpif_dbg(2, debug, "vpif_dqbuf\n"); 1086 1087 return videobuf_dqbuf(&common->buffer_queue, buf, 1088 file->f_flags & O_NONBLOCK); 1089} 1090 1091/** 1092 * vpif_streamon() - streamon handler 1093 * @file: file ptr 1094 * @priv: file handle 1095 * @buftype: v4l2 buffer type 1096 */ 1097static int vpif_streamon(struct file *file, void *priv, 1098 enum v4l2_buf_type buftype) 1099{ 1100 1101 struct vpif_capture_config *config = vpif_dev->platform_data; 1102 struct vpif_fh *fh = priv; 1103 struct channel_obj *ch = fh->channel; 1104 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1105 struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id]; 1106 struct vpif_params *vpif; 1107 unsigned long addr = 0; 1108 int ret = 0; 1109 1110 vpif_dbg(2, debug, "vpif_streamon\n"); 1111 1112 vpif = &ch->vpifparams; 1113 1114 if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) { 1115 vpif_dbg(1, debug, "buffer type not supported\n"); 1116 return -EINVAL; 1117 } 1118 1119 /* If file handle is not allowed IO, return error */ 1120 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { 1121 vpif_dbg(1, debug, "io not allowed\n"); 1122 return -EACCES; 1123 } 1124 1125 /* If Streaming is already started, return error */ 1126 if (common->started) { 1127 vpif_dbg(1, debug, "channel->started\n"); 1128 return -EBUSY; 1129 } 1130 1131 if ((ch->channel_id == VPIF_CHANNEL0_VIDEO && 1132 oth_ch->common[VPIF_VIDEO_INDEX].started && 1133 vpif->std_info.ycmux_mode == 0) || 1134 ((ch->channel_id == VPIF_CHANNEL1_VIDEO) && 1135 (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) { 1136 vpif_dbg(1, debug, "other channel is being used\n"); 1137 return -EBUSY; 1138 } 1139 1140 ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0); 1141 if (ret) 1142 return ret; 1143 1144 /* Enable streamon on the sub device */ 1145 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video, 1146 s_stream, 1); 1147 1148 if (ret && (ret != -ENOIOCTLCMD)) { 1149 vpif_dbg(1, debug, "stream on failed in subdev\n"); 1150 return ret; 1151 } 1152 1153 /* Call videobuf_streamon to start streaming in videobuf */ 1154 ret = videobuf_streamon(&common->buffer_queue); 1155 if (ret) { 1156 vpif_dbg(1, debug, "videobuf_streamon\n"); 1157 return ret; 1158 } 1159 1160 if (mutex_lock_interruptible(&common->lock)) { 1161 ret = -ERESTARTSYS; 1162 goto streamoff_exit; 1163 } 1164 1165 /* If buffer queue is empty, return error */ 1166 if (list_empty(&common->dma_queue)) { 1167 vpif_dbg(1, debug, "buffer queue is empty\n"); 1168 ret = -EIO; 1169 goto exit; 1170 } 1171 1172 /* Get the next frame from the buffer queue */ 1173 common->cur_frm = list_entry(common->dma_queue.next, 1174 struct videobuf_buffer, queue); 1175 common->next_frm = common->cur_frm; 1176 1177 /* Remove buffer from the buffer queue */ 1178 list_del(&common->cur_frm->queue); 1179 /* Mark state of the current frame to active */ 1180 common->cur_frm->state = VIDEOBUF_ACTIVE; 1181 /* Initialize field_id and started member */ 1182 ch->field_id = 0; 1183 common->started = 1; 1184 1185 if (V4L2_MEMORY_USERPTR == common->memory) 1186 addr = common->cur_frm->boff; 1187 else 1188 addr = videobuf_to_dma_contig(common->cur_frm); 1189 1190 /* Calculate the offset for Y and C data in the buffer */ 1191 vpif_calculate_offsets(ch); 1192 1193 if ((vpif->std_info.frm_fmt && 1194 ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) && 1195 (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) || 1196 (!vpif->std_info.frm_fmt && 1197 (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) { 1198 vpif_dbg(1, debug, "conflict in field format and std format\n"); 1199 ret = -EINVAL; 1200 goto exit; 1201 } 1202 1203 /* configure 1 or 2 channel mode */ 1204 ret = config->setup_input_channel_mode(vpif->std_info.ycmux_mode); 1205 1206 if (ret < 0) { 1207 vpif_dbg(1, debug, "can't set vpif channel mode\n"); 1208 goto exit; 1209 } 1210 1211 /* Call vpif_set_params function to set the parameters and addresses */ 1212 ret = vpif_set_video_params(vpif, ch->channel_id); 1213 1214 if (ret < 0) { 1215 vpif_dbg(1, debug, "can't set video params\n"); 1216 goto exit; 1217 } 1218 1219 common->started = ret; 1220 vpif_config_addr(ch, ret); 1221 1222 common->set_addr(addr + common->ytop_off, 1223 addr + common->ybtm_off, 1224 addr + common->ctop_off, 1225 addr + common->cbtm_off); 1226 1227 /** 1228 * Set interrupt for both the fields in VPIF Register enable channel in 1229 * VPIF register 1230 */ 1231 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) { 1232 channel0_intr_assert(); 1233 channel0_intr_enable(1); 1234 enable_channel0(1); 1235 } 1236 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) || 1237 (common->started == 2)) { 1238 channel1_intr_assert(); 1239 channel1_intr_enable(1); 1240 enable_channel1(1); 1241 } 1242 channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1; 1243 mutex_unlock(&common->lock); 1244 return ret; 1245 1246exit: 1247 mutex_unlock(&common->lock); 1248streamoff_exit: 1249 ret = videobuf_streamoff(&common->buffer_queue); 1250 return ret; 1251} 1252 1253/** 1254 * vpif_streamoff() - streamoff handler 1255 * @file: file ptr 1256 * @priv: file handle 1257 * @buftype: v4l2 buffer type 1258 */ 1259static int vpif_streamoff(struct file *file, void *priv, 1260 enum v4l2_buf_type buftype) 1261{ 1262 1263 struct vpif_fh *fh = priv; 1264 struct channel_obj *ch = fh->channel; 1265 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1266 int ret; 1267 1268 vpif_dbg(2, debug, "vpif_streamoff\n"); 1269 1270 if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) { 1271 vpif_dbg(1, debug, "buffer type not supported\n"); 1272 return -EINVAL; 1273 } 1274 1275 /* If io is allowed for this file handle, return error */ 1276 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) { 1277 vpif_dbg(1, debug, "io not allowed\n"); 1278 return -EACCES; 1279 } 1280 1281 /* If streaming is not started, return error */ 1282 if (!common->started) { 1283 vpif_dbg(1, debug, "channel->started\n"); 1284 return -EINVAL; 1285 } 1286 1287 if (mutex_lock_interruptible(&common->lock)) 1288 return -ERESTARTSYS; 1289 1290 /* disable channel */ 1291 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) { 1292 enable_channel0(0); 1293 channel0_intr_enable(0); 1294 } else { 1295 enable_channel1(0); 1296 channel1_intr_enable(0); 1297 } 1298 1299 common->started = 0; 1300 1301 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video, 1302 s_stream, 0); 1303 1304 if (ret && (ret != -ENOIOCTLCMD)) 1305 vpif_dbg(1, debug, "stream off failed in subdev\n"); 1306 1307 mutex_unlock(&common->lock); 1308 1309 return videobuf_streamoff(&common->buffer_queue); 1310} 1311 1312/** 1313 * vpif_map_sub_device_to_input() - Maps sub device to input 1314 * @ch - ptr to channel 1315 * @config - ptr to capture configuration 1316 * @input_index - Given input index from application 1317 * @sub_device_index - index into sd table 1318 * 1319 * lookup the sub device information for a given input index. 1320 * we report all the inputs to application. inputs table also 1321 * has sub device name for the each input 1322 */ 1323static struct vpif_subdev_info *vpif_map_sub_device_to_input( 1324 struct channel_obj *ch, 1325 struct vpif_capture_config *vpif_cfg, 1326 int input_index, 1327 int *sub_device_index) 1328{ 1329 struct vpif_capture_chan_config *chan_cfg; 1330 struct vpif_subdev_info *subdev_info = NULL; 1331 const char *subdev_name = NULL; 1332 int i; 1333 1334 vpif_dbg(2, debug, "vpif_map_sub_device_to_input\n"); 1335 1336 chan_cfg = &vpif_cfg->chan_config[ch->channel_id]; 1337 1338 /** 1339 * search through the inputs to find the sub device supporting 1340 * the input 1341 */ 1342 for (i = 0; i < chan_cfg->input_count; i++) { 1343 /* For each sub device, loop through input */ 1344 if (i == input_index) { 1345 subdev_name = chan_cfg->inputs[i].subdev_name; 1346 break; 1347 } 1348 } 1349 1350 /* if reached maximum. return null */ 1351 if (i == chan_cfg->input_count || (NULL == subdev_name)) 1352 return subdev_info; 1353 1354 /* loop through the sub device list to get the sub device info */ 1355 for (i = 0; i < vpif_cfg->subdev_count; i++) { 1356 subdev_info = &vpif_cfg->subdev_info[i]; 1357 if (!strcmp(subdev_info->name, subdev_name)) 1358 break; 1359 } 1360 1361 if (i == vpif_cfg->subdev_count) 1362 return subdev_info; 1363 1364 /* check if the sub device is registered */ 1365 if (NULL == vpif_obj.sd[i]) 1366 return NULL; 1367 1368 *sub_device_index = i; 1369 return subdev_info; 1370} 1371 1372/** 1373 * vpif_querystd() - querystd handler 1374 * @file: file ptr 1375 * @priv: file handle 1376 * @std_id: ptr to std id 1377 * 1378 * This function is called to detect standard at the selected input 1379 */ 1380static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id) 1381{ 1382 struct vpif_fh *fh = priv; 1383 struct channel_obj *ch = fh->channel; 1384 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1385 int ret = 0; 1386 1387 vpif_dbg(2, debug, "vpif_querystd\n"); 1388 1389 if (mutex_lock_interruptible(&common->lock)) 1390 return -ERESTARTSYS; 1391 1392 /* Call querystd function of decoder device */ 1393 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video, 1394 querystd, std_id); 1395 if (ret < 0) 1396 vpif_dbg(1, debug, "Failed to set standard for sub devices\n"); 1397 1398 mutex_unlock(&common->lock); 1399 return ret; 1400} 1401 1402/** 1403 * vpif_g_std() - get STD handler 1404 * @file: file ptr 1405 * @priv: file handle 1406 * @std_id: ptr to std id 1407 */ 1408static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std) 1409{ 1410 struct vpif_fh *fh = priv; 1411 struct channel_obj *ch = fh->channel; 1412 1413 vpif_dbg(2, debug, "vpif_g_std\n"); 1414 1415 *std = ch->video.stdid; 1416 return 0; 1417} 1418 1419/** 1420 * vpif_s_std() - set STD handler 1421 * @file: file ptr 1422 * @priv: file handle 1423 * @std_id: ptr to std id 1424 */ 1425static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id) 1426{ 1427 struct vpif_fh *fh = priv; 1428 struct channel_obj *ch = fh->channel; 1429 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1430 int ret = 0; 1431 1432 vpif_dbg(2, debug, "vpif_s_std\n"); 1433 1434 if (common->started) { 1435 vpif_err("streaming in progress\n"); 1436 return -EBUSY; 1437 } 1438 1439 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) || 1440 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { 1441 if (!fh->initialized) { 1442 vpif_dbg(1, debug, "Channel Busy\n"); 1443 return -EBUSY; 1444 } 1445 } 1446 1447 ret = v4l2_prio_check(&ch->prio, fh->prio); 1448 if (0 != ret) 1449 return ret; 1450 1451 fh->initialized = 1; 1452 1453 /* Call encoder subdevice function to set the standard */ 1454 if (mutex_lock_interruptible(&common->lock)) 1455 return -ERESTARTSYS; 1456 1457 ch->video.stdid = *std_id; 1458 1459 /* Get the information about the standard */ 1460 if (vpif_update_std_info(ch)) { 1461 ret = -EINVAL; 1462 vpif_err("Error getting the standard info\n"); 1463 goto s_std_exit; 1464 } 1465 1466 /* Configure the default format information */ 1467 vpif_config_format(ch); 1468 1469 /* set standard in the sub device */ 1470 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], core, 1471 s_std, *std_id); 1472 if (ret < 0) 1473 vpif_dbg(1, debug, "Failed to set standard for sub devices\n"); 1474 1475s_std_exit: 1476 mutex_unlock(&common->lock); 1477 return ret; 1478} 1479 1480/** 1481 * vpif_enum_input() - ENUMINPUT handler 1482 * @file: file ptr 1483 * @priv: file handle 1484 * @input: ptr to input structure 1485 */ 1486static int vpif_enum_input(struct file *file, void *priv, 1487 struct v4l2_input *input) 1488{ 1489 1490 struct vpif_capture_config *config = vpif_dev->platform_data; 1491 struct vpif_capture_chan_config *chan_cfg; 1492 struct vpif_fh *fh = priv; 1493 struct channel_obj *ch = fh->channel; 1494 1495 chan_cfg = &config->chan_config[ch->channel_id]; 1496 1497 if (input->index >= chan_cfg->input_count) { 1498 vpif_dbg(1, debug, "Invalid input index\n"); 1499 return -EINVAL; 1500 } 1501 1502 memcpy(input, &chan_cfg->inputs[input->index].input, 1503 sizeof(*input)); 1504 return 0; 1505} 1506 1507/** 1508 * vpif_g_input() - Get INPUT handler 1509 * @file: file ptr 1510 * @priv: file handle 1511 * @index: ptr to input index 1512 */ 1513static int vpif_g_input(struct file *file, void *priv, unsigned int *index) 1514{ 1515 struct vpif_fh *fh = priv; 1516 struct channel_obj *ch = fh->channel; 1517 struct video_obj *vid_ch = &ch->video; 1518 1519 *index = vid_ch->input_idx; 1520 1521 return 0; 1522} 1523 1524/** 1525 * vpif_s_input() - Set INPUT handler 1526 * @file: file ptr 1527 * @priv: file handle 1528 * @index: input index 1529 */ 1530static int vpif_s_input(struct file *file, void *priv, unsigned int index) 1531{ 1532 struct vpif_capture_config *config = vpif_dev->platform_data; 1533 struct vpif_capture_chan_config *chan_cfg; 1534 struct vpif_fh *fh = priv; 1535 struct channel_obj *ch = fh->channel; 1536 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1537 struct video_obj *vid_ch = &ch->video; 1538 struct vpif_subdev_info *subdev_info; 1539 int ret = 0, sd_index = 0; 1540 u32 input = 0, output = 0; 1541 1542 chan_cfg = &config->chan_config[ch->channel_id]; 1543 1544 if (common->started) { 1545 vpif_err("Streaming in progress\n"); 1546 return -EBUSY; 1547 } 1548 1549 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) || 1550 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { 1551 if (!fh->initialized) { 1552 vpif_dbg(1, debug, "Channel Busy\n"); 1553 return -EBUSY; 1554 } 1555 } 1556 1557 ret = v4l2_prio_check(&ch->prio, fh->prio); 1558 if (0 != ret) 1559 return ret; 1560 1561 fh->initialized = 1; 1562 subdev_info = vpif_map_sub_device_to_input(ch, config, index, 1563 &sd_index); 1564 if (NULL == subdev_info) { 1565 vpif_dbg(1, debug, 1566 "couldn't lookup sub device for the input index\n"); 1567 return -EINVAL; 1568 } 1569 1570 if (mutex_lock_interruptible(&common->lock)) 1571 return -ERESTARTSYS; 1572 1573 /* first setup input path from sub device to vpif */ 1574 if (config->setup_input_path) { 1575 ret = config->setup_input_path(ch->channel_id, 1576 subdev_info->name); 1577 if (ret < 0) { 1578 vpif_dbg(1, debug, "couldn't setup input path for the" 1579 " sub device %s, for input index %d\n", 1580 subdev_info->name, index); 1581 goto exit; 1582 } 1583 } 1584 1585 if (subdev_info->can_route) { 1586 input = subdev_info->input; 1587 output = subdev_info->output; 1588 ret = v4l2_subdev_call(vpif_obj.sd[sd_index], video, s_routing, 1589 input, output, 0); 1590 if (ret < 0) { 1591 vpif_dbg(1, debug, "Failed to set input\n"); 1592 goto exit; 1593 } 1594 } 1595 vid_ch->input_idx = index; 1596 ch->curr_subdev_info = subdev_info; 1597 ch->curr_sd_index = sd_index; 1598 /* copy interface parameters to vpif */ 1599 ch->vpifparams.iface = subdev_info->vpif_if; 1600 1601 /* update tvnorms from the sub device input info */ 1602 ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std; 1603 1604exit: 1605 mutex_unlock(&common->lock); 1606 return ret; 1607} 1608 1609/** 1610 * vpif_enum_fmt_vid_cap() - ENUM_FMT handler 1611 * @file: file ptr 1612 * @priv: file handle 1613 * @index: input index 1614 */ 1615static int vpif_enum_fmt_vid_cap(struct file *file, void *priv, 1616 struct v4l2_fmtdesc *fmt) 1617{ 1618 struct vpif_fh *fh = priv; 1619 struct channel_obj *ch = fh->channel; 1620 1621 if (fmt->index != 0) { 1622 vpif_dbg(1, debug, "Invalid format index\n"); 1623 return -EINVAL; 1624 } 1625 1626 /* Fill in the information about format */ 1627 if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) { 1628 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1629 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb"); 1630 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8; 1631 } else { 1632 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1633 strcpy(fmt->description, "YCbCr4:2:2 YC Planar"); 1634 fmt->pixelformat = V4L2_PIX_FMT_YUV422P; 1635 } 1636 return 0; 1637} 1638 1639/** 1640 * vpif_try_fmt_vid_cap() - TRY_FMT handler 1641 * @file: file ptr 1642 * @priv: file handle 1643 * @fmt: ptr to v4l2 format structure 1644 */ 1645static int vpif_try_fmt_vid_cap(struct file *file, void *priv, 1646 struct v4l2_format *fmt) 1647{ 1648 struct vpif_fh *fh = priv; 1649 struct channel_obj *ch = fh->channel; 1650 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix; 1651 1652 return vpif_check_format(ch, pixfmt, 1); 1653} 1654 1655 1656/** 1657 * vpif_g_fmt_vid_cap() - Set INPUT handler 1658 * @file: file ptr 1659 * @priv: file handle 1660 * @fmt: ptr to v4l2 format structure 1661 */ 1662static int vpif_g_fmt_vid_cap(struct file *file, void *priv, 1663 struct v4l2_format *fmt) 1664{ 1665 struct vpif_fh *fh = priv; 1666 struct channel_obj *ch = fh->channel; 1667 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1668 1669 /* Check the validity of the buffer type */ 1670 if (common->fmt.type != fmt->type) 1671 return -EINVAL; 1672 1673 /* Fill in the information about format */ 1674 if (mutex_lock_interruptible(&common->lock)) 1675 return -ERESTARTSYS; 1676 1677 *fmt = common->fmt; 1678 mutex_unlock(&common->lock); 1679 return 0; 1680} 1681 1682/** 1683 * vpif_s_fmt_vid_cap() - Set FMT handler 1684 * @file: file ptr 1685 * @priv: file handle 1686 * @fmt: ptr to v4l2 format structure 1687 */ 1688static int vpif_s_fmt_vid_cap(struct file *file, void *priv, 1689 struct v4l2_format *fmt) 1690{ 1691 struct vpif_fh *fh = priv; 1692 struct channel_obj *ch = fh->channel; 1693 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1694 struct v4l2_pix_format *pixfmt; 1695 int ret = 0; 1696 1697 vpif_dbg(2, debug, "VIDIOC_S_FMT\n"); 1698 1699 /* If streaming is started, return error */ 1700 if (common->started) { 1701 vpif_dbg(1, debug, "Streaming is started\n"); 1702 return -EBUSY; 1703 } 1704 1705 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) || 1706 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) { 1707 if (!fh->initialized) { 1708 vpif_dbg(1, debug, "Channel Busy\n"); 1709 return -EBUSY; 1710 } 1711 } 1712 1713 ret = v4l2_prio_check(&ch->prio, fh->prio); 1714 if (0 != ret) 1715 return ret; 1716 1717 fh->initialized = 1; 1718 1719 pixfmt = &fmt->fmt.pix; 1720 /* Check for valid field format */ 1721 ret = vpif_check_format(ch, pixfmt, 0); 1722 1723 if (ret) 1724 return ret; 1725 /* store the format in the channel object */ 1726 if (mutex_lock_interruptible(&common->lock)) 1727 return -ERESTARTSYS; 1728 1729 common->fmt = *fmt; 1730 mutex_unlock(&common->lock); 1731 1732 return 0; 1733} 1734 1735/** 1736 * vpif_querycap() - QUERYCAP handler 1737 * @file: file ptr 1738 * @priv: file handle 1739 * @cap: ptr to v4l2_capability structure 1740 */ 1741static int vpif_querycap(struct file *file, void *priv, 1742 struct v4l2_capability *cap) 1743{ 1744 struct vpif_capture_config *config = vpif_dev->platform_data; 1745 1746 cap->version = VPIF_CAPTURE_VERSION_CODE; 1747 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1748 strlcpy(cap->driver, "vpif capture", sizeof(cap->driver)); 1749 strlcpy(cap->bus_info, "DM646x Platform", sizeof(cap->bus_info)); 1750 strlcpy(cap->card, config->card_name, sizeof(cap->card)); 1751 1752 return 0; 1753} 1754 1755/** 1756 * vpif_g_priority() - get priority handler 1757 * @file: file ptr 1758 * @priv: file handle 1759 * @prio: ptr to v4l2_priority structure 1760 */ 1761static int vpif_g_priority(struct file *file, void *priv, 1762 enum v4l2_priority *prio) 1763{ 1764 struct vpif_fh *fh = priv; 1765 struct channel_obj *ch = fh->channel; 1766 1767 *prio = v4l2_prio_max(&ch->prio); 1768 1769 return 0; 1770} 1771 1772/** 1773 * vpif_s_priority() - set priority handler 1774 * @file: file ptr 1775 * @priv: file handle 1776 * @prio: ptr to v4l2_priority structure 1777 */ 1778static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p) 1779{ 1780 struct vpif_fh *fh = priv; 1781 struct channel_obj *ch = fh->channel; 1782 1783 return v4l2_prio_change(&ch->prio, &fh->prio, p); 1784} 1785 1786/** 1787 * vpif_cropcap() - cropcap handler 1788 * @file: file ptr 1789 * @priv: file handle 1790 * @crop: ptr to v4l2_cropcap structure 1791 */ 1792static int vpif_cropcap(struct file *file, void *priv, 1793 struct v4l2_cropcap *crop) 1794{ 1795 struct vpif_fh *fh = priv; 1796 struct channel_obj *ch = fh->channel; 1797 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; 1798 1799 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type) 1800 return -EINVAL; 1801 1802 crop->bounds.left = 0; 1803 crop->bounds.top = 0; 1804 crop->bounds.height = common->height; 1805 crop->bounds.width = common->width; 1806 crop->defrect = crop->bounds; 1807 return 0; 1808} 1809 1810/* vpif capture ioctl operations */ 1811static const struct v4l2_ioctl_ops vpif_ioctl_ops = { 1812 .vidioc_querycap = vpif_querycap, 1813 .vidioc_g_priority = vpif_g_priority, 1814 .vidioc_s_priority = vpif_s_priority, 1815 .vidioc_enum_fmt_vid_cap = vpif_enum_fmt_vid_cap, 1816 .vidioc_g_fmt_vid_cap = vpif_g_fmt_vid_cap, 1817 .vidioc_s_fmt_vid_cap = vpif_s_fmt_vid_cap, 1818 .vidioc_try_fmt_vid_cap = vpif_try_fmt_vid_cap, 1819 .vidioc_enum_input = vpif_enum_input, 1820 .vidioc_s_input = vpif_s_input, 1821 .vidioc_g_input = vpif_g_input, 1822 .vidioc_reqbufs = vpif_reqbufs, 1823 .vidioc_querybuf = vpif_querybuf, 1824 .vidioc_querystd = vpif_querystd, 1825 .vidioc_s_std = vpif_s_std, 1826 .vidioc_g_std = vpif_g_std, 1827 .vidioc_qbuf = vpif_qbuf, 1828 .vidioc_dqbuf = vpif_dqbuf, 1829 .vidioc_streamon = vpif_streamon, 1830 .vidioc_streamoff = vpif_streamoff, 1831 .vidioc_cropcap = vpif_cropcap, 1832}; 1833 1834/* vpif file operations */ 1835static struct v4l2_file_operations vpif_fops = { 1836 .owner = THIS_MODULE, 1837 .open = vpif_open, 1838 .release = vpif_release, 1839 .ioctl = video_ioctl2, 1840 .mmap = vpif_mmap, 1841 .poll = vpif_poll 1842}; 1843 1844/* vpif video template */ 1845static struct video_device vpif_video_template = { 1846 .name = "vpif", 1847 .fops = &vpif_fops, 1848 .minor = -1, 1849 .ioctl_ops = &vpif_ioctl_ops, 1850}; 1851 1852/** 1853 * initialize_vpif() - Initialize vpif data structures 1854 * 1855 * Allocate memory for data structures and initialize them 1856 */ 1857static int initialize_vpif(void) 1858{ 1859 int err = 0, i, j; 1860 int free_channel_objects_index; 1861 1862 /* Default number of buffers should be 3 */ 1863 if ((ch0_numbuffers > 0) && 1864 (ch0_numbuffers < config_params.min_numbuffers)) 1865 ch0_numbuffers = config_params.min_numbuffers; 1866 if ((ch1_numbuffers > 0) && 1867 (ch1_numbuffers < config_params.min_numbuffers)) 1868 ch1_numbuffers = config_params.min_numbuffers; 1869 1870 /* Set buffer size to min buffers size if it is invalid */ 1871 if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO]) 1872 ch0_bufsize = 1873 config_params.min_bufsize[VPIF_CHANNEL0_VIDEO]; 1874 if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO]) 1875 ch1_bufsize = 1876 config_params.min_bufsize[VPIF_CHANNEL1_VIDEO]; 1877 1878 config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers; 1879 config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers; 1880 if (ch0_numbuffers) { 1881 config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO] 1882 = ch0_bufsize; 1883 } 1884 if (ch1_numbuffers) { 1885 config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO] 1886 = ch1_bufsize; 1887 } 1888 1889 /* Allocate memory for six channel objects */ 1890 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) { 1891 vpif_obj.dev[i] = 1892 kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL); 1893 /* If memory allocation fails, return error */ 1894 if (!vpif_obj.dev[i]) { 1895 free_channel_objects_index = i; 1896 err = -ENOMEM; 1897 goto vpif_init_free_channel_objects; 1898 } 1899 } 1900 return 0; 1901 1902vpif_init_free_channel_objects: 1903 for (j = 0; j < free_channel_objects_index; j++) 1904 kfree(vpif_obj.dev[j]); 1905 return err; 1906} 1907 1908/** 1909 * vpif_probe : This function probes the vpif capture driver 1910 * @pdev: platform device pointer 1911 * 1912 * This creates device entries by register itself to the V4L2 driver and 1913 * initializes fields of each channel objects 1914 */ 1915static __init int vpif_probe(struct platform_device *pdev) 1916{ 1917 struct vpif_subdev_info *subdevdata; 1918 struct vpif_capture_config *config; 1919 int i, j, k, m, q, err; 1920 struct i2c_adapter *i2c_adap; 1921 struct channel_obj *ch; 1922 struct common_obj *common; 1923 struct video_device *vfd; 1924 struct resource *res; 1925 int subdev_count; 1926 1927 vpif_dev = &pdev->dev; 1928 1929 err = initialize_vpif(); 1930 if (err) { 1931 v4l2_err(vpif_dev->driver, "Error initializing vpif\n"); 1932 return err; 1933 } 1934 1935 k = 0; 1936 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) { 1937 for (i = res->start; i <= res->end; i++) { 1938 if (request_irq(i, vpif_channel_isr, IRQF_DISABLED, 1939 "DM646x_Capture", 1940 (void *)(&vpif_obj.dev[k]->channel_id))) { 1941 err = -EBUSY; 1942 i--; 1943 goto vpif_int_err; 1944 } 1945 } 1946 k++; 1947 } 1948 1949 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) { 1950 /* Get the pointer to the channel object */ 1951 ch = vpif_obj.dev[i]; 1952 /* Allocate memory for video device */ 1953 vfd = video_device_alloc(); 1954 if (NULL == vfd) { 1955 for (j = 0; j < i; j++) { 1956 ch = vpif_obj.dev[j]; 1957 video_device_release(ch->video_dev); 1958 } 1959 err = -ENOMEM; 1960 goto vpif_dev_alloc_err; 1961 } 1962 1963 /* Initialize field of video device */ 1964 *vfd = vpif_video_template; 1965 vfd->v4l2_dev = &vpif_obj.v4l2_dev; 1966 vfd->release = video_device_release; 1967 snprintf(vfd->name, sizeof(vfd->name), 1968 "DM646x_VPIFCapture_DRIVER_V%d.%d.%d", 1969 (VPIF_CAPTURE_VERSION_CODE >> 16) & 0xff, 1970 (VPIF_CAPTURE_VERSION_CODE >> 8) & 0xff, 1971 (VPIF_CAPTURE_VERSION_CODE) & 0xff); 1972 /* Set video_dev to the video device */ 1973 ch->video_dev = vfd; 1974 } 1975 1976 for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) { 1977 ch = vpif_obj.dev[j]; 1978 ch->channel_id = j; 1979 common = &(ch->common[VPIF_VIDEO_INDEX]); 1980 spin_lock_init(&common->irqlock); 1981 mutex_init(&common->lock); 1982 /* Initialize prio member of channel object */ 1983 v4l2_prio_init(&ch->prio); 1984 err = video_register_device(ch->video_dev, 1985 VFL_TYPE_GRABBER, (j ? 1 : 0)); 1986 if (err) 1987 goto probe_out; 1988 1989 video_set_drvdata(ch->video_dev, ch); 1990 1991 } 1992 1993 i2c_adap = i2c_get_adapter(1); 1994 config = pdev->dev.platform_data; 1995 1996 subdev_count = config->subdev_count; 1997 vpif_obj.sd = kmalloc(sizeof(struct v4l2_subdev *) * subdev_count, 1998 GFP_KERNEL); 1999 if (vpif_obj.sd == NULL) { 2000 vpif_err("unable to allocate memory for subdevice pointers\n"); 2001 err = -ENOMEM; 2002 goto probe_out; 2003 } 2004 2005 err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev); 2006 if (err) { 2007 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n"); 2008 goto probe_subdev_out; 2009 } 2010 2011 for (i = 0; i < subdev_count; i++) { 2012 subdevdata = &config->subdev_info[i]; 2013 vpif_obj.sd[i] = 2014 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev, 2015 i2c_adap, 2016 subdevdata->name, 2017 &subdevdata->board_info, 2018 NULL); 2019 2020 if (!vpif_obj.sd[i]) { 2021 vpif_err("Error registering v4l2 subdevice\n"); 2022 goto probe_subdev_out; 2023 } 2024 v4l2_info(&vpif_obj.v4l2_dev, "registered sub device %s\n", 2025 subdevdata->name); 2026 2027 if (vpif_obj.sd[i]) 2028 vpif_obj.sd[i]->grp_id = 1 << i; 2029 } 2030 v4l2_info(&vpif_obj.v4l2_dev, "DM646x VPIF Capture driver" 2031 " initialized\n"); 2032 2033 return 0; 2034 2035probe_subdev_out: 2036 /* free sub devices memory */ 2037 kfree(vpif_obj.sd); 2038 2039 j = VPIF_CAPTURE_MAX_DEVICES; 2040probe_out: 2041 v4l2_device_unregister(&vpif_obj.v4l2_dev); 2042 for (k = 0; k < j; k++) { 2043 /* Get the pointer to the channel object */ 2044 ch = vpif_obj.dev[k]; 2045 /* Unregister video device */ 2046 video_unregister_device(ch->video_dev); 2047 } 2048 2049vpif_dev_alloc_err: 2050 k = VPIF_CAPTURE_MAX_DEVICES-1; 2051 res = platform_get_resource(pdev, IORESOURCE_IRQ, k); 2052 i = res->end; 2053 2054vpif_int_err: 2055 for (q = k; q >= 0; q--) { 2056 for (m = i; m >= (int)res->start; m--) 2057 free_irq(m, (void *)(&vpif_obj.dev[q]->channel_id)); 2058 2059 res = platform_get_resource(pdev, IORESOURCE_IRQ, q-1); 2060 if (res) 2061 i = res->end; 2062 } 2063 return err; 2064} 2065 2066/** 2067 * vpif_remove() - driver remove handler 2068 * @device: ptr to platform device structure 2069 * 2070 * The vidoe device is unregistered 2071 */ 2072static int vpif_remove(struct platform_device *device) 2073{ 2074 int i; 2075 struct channel_obj *ch; 2076 2077 v4l2_device_unregister(&vpif_obj.v4l2_dev); 2078 2079 /* un-register device */ 2080 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) { 2081 /* Get the pointer to the channel object */ 2082 ch = vpif_obj.dev[i]; 2083 /* Unregister video device */ 2084 video_unregister_device(ch->video_dev); 2085 } 2086 return 0; 2087} 2088 2089/** 2090 * vpif_suspend: vpif device suspend 2091 * 2092 * TODO: Add suspend code here 2093 */ 2094static int 2095vpif_suspend(struct device *dev) 2096{ 2097 return -1; 2098} 2099 2100/** 2101 * vpif_resume: vpif device suspend 2102 * 2103 * TODO: Add resume code here 2104 */ 2105static int 2106vpif_resume(struct device *dev) 2107{ 2108 return -1; 2109} 2110 2111static const struct dev_pm_ops vpif_dev_pm_ops = { 2112 .suspend = vpif_suspend, 2113 .resume = vpif_resume, 2114}; 2115 2116static struct platform_driver vpif_driver = { 2117 .driver = { 2118 .name = "vpif_capture", 2119 .owner = THIS_MODULE, 2120 .pm = &vpif_dev_pm_ops, 2121 }, 2122 .probe = vpif_probe, 2123 .remove = vpif_remove, 2124}; 2125 2126/** 2127 * vpif_init: initialize the vpif driver 2128 * 2129 * This function registers device and driver to the kernel, requests irq 2130 * handler and allocates memory 2131 * for channel objects 2132 */ 2133static __init int vpif_init(void) 2134{ 2135 return platform_driver_register(&vpif_driver); 2136} 2137 2138/** 2139 * vpif_cleanup : This function clean up the vpif capture resources 2140 * 2141 * This will un-registers device and driver to the kernel, frees 2142 * requested irq handler and de-allocates memory allocated for channel 2143 * objects. 2144 */ 2145static void vpif_cleanup(void) 2146{ 2147 struct platform_device *pdev; 2148 struct resource *res; 2149 int irq_num; 2150 int i = 0; 2151 2152 pdev = container_of(vpif_dev, struct platform_device, dev); 2153 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) { 2154 for (irq_num = res->start; irq_num <= res->end; irq_num++) 2155 free_irq(irq_num, 2156 (void *)(&vpif_obj.dev[i]->channel_id)); 2157 i++; 2158 } 2159 2160 platform_driver_unregister(&vpif_driver); 2161 2162 kfree(vpif_obj.sd); 2163 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) 2164 kfree(vpif_obj.dev[i]); 2165} 2166 2167/* Function for module initialization and cleanup */ 2168module_init(vpif_init); 2169module_exit(vpif_cleanup); 2170