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const: constify remaining dev_pm_ops
[deliverable/linux.git] / drivers / media / video / davinci / vpif_capture.c
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6ffefff5
MK		 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 <media/v4l2-device.h>
38#include <media/v4l2-ioctl.h>
39
40#include "vpif_capture.h"
41#include "vpif.h"
42
43MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
44MODULE_LICENSE("GPL");
45
46#define vpif_err(fmt, arg...) v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
47#define vpif_dbg(level, debug, fmt, arg...) \
48 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
49
50static int debug = 1;
51static u32 ch0_numbuffers = 3;
52static u32 ch1_numbuffers = 3;
53static u32 ch0_bufsize = 1920 * 1080 * 2;
54static u32 ch1_bufsize = 720 * 576 * 2;
55
56module_param(debug, int, 0644);
57module_param(ch0_numbuffers, uint, S_IRUGO);
58module_param(ch1_numbuffers, uint, S_IRUGO);
59module_param(ch0_bufsize, uint, S_IRUGO);
60module_param(ch1_bufsize, uint, S_IRUGO);
61
62MODULE_PARM_DESC(debug, "Debug level 0-1");
63MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)");
64MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)");
65MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)");
66MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)");
67
68static struct vpif_config_params config_params = {
69 .min_numbuffers = 3,
70 .numbuffers[0] = 3,
71 .numbuffers[1] = 3,
72 .min_bufsize[0] = 720 * 480 * 2,
73 .min_bufsize[1] = 720 * 480 * 2,
74 .channel_bufsize[0] = 1920 * 1080 * 2,
75 .channel_bufsize[1] = 720 * 576 * 2,
76};
77
78/* global variables */
79static struct vpif_device vpif_obj = { {NULL} };
80static struct device *vpif_dev;
81
82/**
83 * ch_params: video standard configuration parameters for vpif
84 */
85static const struct vpif_channel_config_params ch_params[] = {
86 {
87 "NTSC_M", 720, 480, 30, 0, 1, 268, 1440, 1, 23, 263, 266,
88 286, 525, 525, 0, 1, 0, V4L2_STD_525_60,
89 },
90 {
91 "PAL_BDGHIK", 720, 576, 25, 0, 1, 280, 1440, 1, 23, 311, 313,
92 336, 624, 625, 0, 1, 0, V4L2_STD_625_50,
93 },
94};
95
96/**
97 * vpif_uservirt_to_phys : translate user/virtual address to phy address
98 * @virtp: user/virtual address
99 *
100 * This inline function is used to convert user space virtual address to
101 * physical address.
102 */
103static inline u32 vpif_uservirt_to_phys(u32 virtp)
104{
105 unsigned long physp = 0;
106 struct mm_struct *mm = current->mm;
107 struct vm_area_struct *vma;
108
109 vma = find_vma(mm, virtp);
110
111 /* For kernel direct-mapped memory, take the easy way */
112 if (virtp >= PAGE_OFFSET)
113 physp = virt_to_phys((void *)virtp);
114 else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff))
115 /**
116 * this will catch, kernel-allocated, mmaped-to-usermode
117 * addresses
118 */
119 physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
120 else {
121 /* otherwise, use get_user_pages() for general userland pages */
122 int res, nr_pages = 1;
123 struct page *pages;
124
125 down_read(&current->mm->mmap_sem);
126
127 res = get_user_pages(current, current->mm,
128 virtp, nr_pages, 1, 0, &pages, NULL);
129 up_read(&current->mm->mmap_sem);
130
131 if (res == nr_pages)
132 physp = __pa(page_address(&pages[0]) +
133 (virtp & ~PAGE_MASK));
134 else {
135 vpif_err("get_user_pages failed\n");
136 return 0;
137 }
138 }
139 return physp;
140}
141
142/**
143 * buffer_prepare : callback function for buffer prepare
144 * @q : buffer queue ptr
145 * @vb: ptr to video buffer
146 * @field: field info
147 *
148 * This is the callback function for buffer prepare when videobuf_qbuf()
149 * function is called. The buffer is prepared and user space virtual address
150 * or user address is converted into physical address
151 */
152static int vpif_buffer_prepare(struct videobuf_queue *q,
153 struct videobuf_buffer *vb,
154 enum v4l2_field field)
155{
156 /* Get the file handle object and channel object */
157 struct vpif_fh *fh = q->priv_data;
158 struct channel_obj *ch = fh->channel;
159 struct common_obj *common;
160 unsigned long addr;
161
162
163 vpif_dbg(2, debug, "vpif_buffer_prepare\n");
164
165 common = &ch->common[VPIF_VIDEO_INDEX];
166
167 /* If buffer is not initialized, initialize it */
168 if (VIDEOBUF_NEEDS_INIT == vb->state) {
169 vb->width = common->width;
170 vb->height = common->height;
171 vb->size = vb->width * vb->height;
172 vb->field = field;
173 }
174 vb->state = VIDEOBUF_PREPARED;
175 /**
176 * if user pointer memory mechanism is used, get the physical
177 * address of the buffer
178 */
179 if (V4L2_MEMORY_USERPTR == common->memory) {
180 if (0 == vb->baddr) {
181 vpif_dbg(1, debug, "buffer address is 0\n");
182 return -EINVAL;
183
184 }
185 vb->boff = vpif_uservirt_to_phys(vb->baddr);
186 if (!IS_ALIGNED(vb->boff, 8))
187 goto exit;
188 }
189
190 addr = vb->boff;
191 if (q->streaming) {
192 if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
193 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
194 !IS_ALIGNED((addr + common->ctop_off), 8) ||
195 !IS_ALIGNED((addr + common->cbtm_off), 8))
196 goto exit;
197 }
198 return 0;
199exit:
200 vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n");
201 return -EINVAL;
202}
203
204/**
205 * vpif_buffer_setup : Callback function for buffer setup.
206 * @q: buffer queue ptr
207 * @count: number of buffers
208 * @size: size of the buffer
209 *
210 * This callback function is called when reqbuf() is called to adjust
211 * the buffer count and buffer size
212 */
213static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count,
214 unsigned int *size)
215{
216 /* Get the file handle object and channel object */
217 struct vpif_fh *fh = q->priv_data;
218 struct channel_obj *ch = fh->channel;
219 struct common_obj *common;
220
221 common = &ch->common[VPIF_VIDEO_INDEX];
222
223 vpif_dbg(2, debug, "vpif_buffer_setup\n");
224
225 /* If memory type is not mmap, return */
226 if (V4L2_MEMORY_MMAP != common->memory)
227 return 0;
228
229 /* Calculate the size of the buffer */
230 *size = config_params.channel_bufsize[ch->channel_id];
231
232 if (*count < config_params.min_numbuffers)
233 *count = config_params.min_numbuffers;
234 return 0;
235}
236
237/**
238 * vpif_buffer_queue : Callback function to add buffer to DMA queue
239 * @q: ptr to videobuf_queue
240 * @vb: ptr to videobuf_buffer
241 */
242static void vpif_buffer_queue(struct videobuf_queue *q,
243 struct videobuf_buffer *vb)
244{
245 /* Get the file handle object and channel object */
246 struct vpif_fh *fh = q->priv_data;
247 struct channel_obj *ch = fh->channel;
248 struct common_obj *common;
249
250 common = &ch->common[VPIF_VIDEO_INDEX];
251
252 vpif_dbg(2, debug, "vpif_buffer_queue\n");
253
254 /* add the buffer to the DMA queue */
255 list_add_tail(&vb->queue, &common->dma_queue);
256 /* Change state of the buffer */
257 vb->state = VIDEOBUF_QUEUED;
258}
259
260/**
261 * vpif_buffer_release : Callback function to free buffer
262 * @q: buffer queue ptr
263 * @vb: ptr to video buffer
264 *
265 * This function is called from the videobuf layer to free memory
266 * allocated to the buffers
267 */
268static void vpif_buffer_release(struct videobuf_queue *q,
269 struct videobuf_buffer *vb)
270{
271 /* Get the file handle object and channel object */
272 struct vpif_fh *fh = q->priv_data;
273 struct channel_obj *ch = fh->channel;
274 struct common_obj *common;
275
276 common = &ch->common[VPIF_VIDEO_INDEX];
277
278 videobuf_dma_contig_free(q, vb);
279 vb->state = VIDEOBUF_NEEDS_INIT;
280}
281
282static struct videobuf_queue_ops video_qops = {
283 .buf_setup = vpif_buffer_setup,
284 .buf_prepare = vpif_buffer_prepare,
285 .buf_queue = vpif_buffer_queue,
286 .buf_release = vpif_buffer_release,
287};
288
289static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] =
290 { {1, 1} };
291
292/**
293 * vpif_process_buffer_complete: process a completed buffer
294 * @common: ptr to common channel object
295 *
296 * This function time stamp the buffer and mark it as DONE. It also
297 * wake up any process waiting on the QUEUE and set the next buffer
298 * as current
299 */
300static void vpif_process_buffer_complete(struct common_obj *common)
301{
302 do_gettimeofday(&common->cur_frm->ts);
303 common->cur_frm->state = VIDEOBUF_DONE;
304 wake_up_interruptible(&common->cur_frm->done);
305 /* Make curFrm pointing to nextFrm */
306 common->cur_frm = common->next_frm;
307}
308
309/**
310 * vpif_schedule_next_buffer: set next buffer address for capture
311 * @common : ptr to common channel object
312 *
313 * This function will get next buffer from the dma queue and
314 * set the buffer address in the vpif register for capture.
315 * the buffer is marked active
316 */
317static void vpif_schedule_next_buffer(struct common_obj *common)
318{
319 unsigned long addr = 0;
320
321 common->next_frm = list_entry(common->dma_queue.next,
322 struct videobuf_buffer, queue);
323 /* Remove that buffer from the buffer queue */
324 list_del(&common->next_frm->queue);
325 common->next_frm->state = VIDEOBUF_ACTIVE;
326 if (V4L2_MEMORY_USERPTR == common->memory)
327 addr = common->next_frm->boff;
328 else
329 addr = videobuf_to_dma_contig(common->next_frm);
330
331 /* Set top and bottom field addresses in VPIF registers */
332 common->set_addr(addr + common->ytop_off,
333 addr + common->ybtm_off,
334 addr + common->ctop_off,
335 addr + common->cbtm_off);
336}
337
338/**
339 * vpif_channel_isr : ISR handler for vpif capture
340 * @irq: irq number
341 * @dev_id: dev_id ptr
342 *
343 * It changes status of the captured buffer, takes next buffer from the queue
344 * and sets its address in VPIF registers
345 */
346static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
347{
348 struct vpif_device *dev = &vpif_obj;
349 struct common_obj *common;
350 struct channel_obj *ch;
351 enum v4l2_field field;
352 int channel_id = 0;
353 int fid = -1, i;
354
355 channel_id = *(int *)(dev_id);
356 ch = dev->dev[channel_id];
357
358 field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
359
360 for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
361 common = &ch->common[i];
362 /* skip If streaming is not started in this channel */
363 if (0 == common->started)
364 continue;
365
366 /* Check the field format */
367 if (1 == ch->vpifparams.std_info.frm_fmt) {
368 /* Progressive mode */
369 if (list_empty(&common->dma_queue))
370 continue;
371
372 if (!channel_first_int[i][channel_id])
373 vpif_process_buffer_complete(common);
374
375 channel_first_int[i][channel_id] = 0;
376
377 vpif_schedule_next_buffer(common);
378
379
380 channel_first_int[i][channel_id] = 0;
381 } else {
382 /**
383 * Interlaced mode. If it is first interrupt, ignore
384 * it
385 */
386 if (channel_first_int[i][channel_id]) {
387 channel_first_int[i][channel_id] = 0;
388 continue;
389 }
390 if (0 == i) {
391 ch->field_id ^= 1;
392 /* Get field id from VPIF registers */
393 fid = vpif_channel_getfid(ch->channel_id);
394 if (fid != ch->field_id) {
395 /**
396 * If field id does not match stored
397 * field id, make them in sync
398 */
399 if (0 == fid)
400 ch->field_id = fid;
401 return IRQ_HANDLED;
402 }
403 }
404 /* device field id and local field id are in sync */
405 if (0 == fid) {
406 /* this is even field */
407 if (common->cur_frm == common->next_frm)
408 continue;
409
410 /* mark the current buffer as done */
411 vpif_process_buffer_complete(common);
412 } else if (1 == fid) {
413 /* odd field */
414 if (list_empty(&common->dma_queue) ||
415 (common->cur_frm != common->next_frm))
416 continue;
417
418 vpif_schedule_next_buffer(common);
419 }
420 }
421 }
422 return IRQ_HANDLED;
423}
424
425/**
426 * vpif_update_std_info() - update standard related info
427 * @ch: ptr to channel object
428 *
429 * For a given standard selected by application, update values
430 * in the device data structures
431 */
432static int vpif_update_std_info(struct channel_obj *ch)
433{
434 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
435 struct vpif_params *vpifparams = &ch->vpifparams;
436 const struct vpif_channel_config_params *config;
437 struct vpif_channel_config_params *std_info;
438 struct video_obj *vid_ch = &ch->video;
439 int index;
440
441 vpif_dbg(2, debug, "vpif_update_std_info\n");
442
443 std_info = &vpifparams->std_info;
444
445 for (index = 0; index < ARRAY_SIZE(ch_params); index++) {
446 config = &ch_params[index];
447 if (config->stdid & vid_ch->stdid) {
448 memcpy(std_info, config, sizeof(*config));
449 break;
450 }
451 }
452
453 /* standard not found */
454 if (index == ARRAY_SIZE(ch_params))
455 return -EINVAL;
456
457 common->fmt.fmt.pix.width = std_info->width;
458 common->width = std_info->width;
459 common->fmt.fmt.pix.height = std_info->height;
460 common->height = std_info->height;
461 common->fmt.fmt.pix.bytesperline = std_info->width;
462 vpifparams->video_params.hpitch = std_info->width;
463 vpifparams->video_params.storage_mode = std_info->frm_fmt;
464 return 0;
465}
466
467/**
468 * vpif_calculate_offsets : This function calculates buffers offsets
469 * @ch : ptr to channel object
470 *
471 * This function calculates buffer offsets for Y and C in the top and
472 * bottom field
473 */
474static void vpif_calculate_offsets(struct channel_obj *ch)
475{
476 unsigned int hpitch, vpitch, sizeimage;
477 struct video_obj *vid_ch = &(ch->video);
478 struct vpif_params *vpifparams = &ch->vpifparams;
479 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
480 enum v4l2_field field = common->fmt.fmt.pix.field;
481
482 vpif_dbg(2, debug, "vpif_calculate_offsets\n");
483
484 if (V4L2_FIELD_ANY == field) {
485 if (vpifparams->std_info.frm_fmt)
486 vid_ch->buf_field = V4L2_FIELD_NONE;
487 else
488 vid_ch->buf_field = V4L2_FIELD_INTERLACED;
489 } else
490 vid_ch->buf_field = common->fmt.fmt.pix.field;
491
492 if (V4L2_MEMORY_USERPTR == common->memory)
493 sizeimage = common->fmt.fmt.pix.sizeimage;
494 else
495 sizeimage = config_params.channel_bufsize[ch->channel_id];
496
497 hpitch = common->fmt.fmt.pix.bytesperline;
498 vpitch = sizeimage / (hpitch * 2);
499
500 if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
501 (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
502 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
503 common->ytop_off = 0;
504 common->ybtm_off = hpitch;
505 common->ctop_off = sizeimage / 2;
506 common->cbtm_off = sizeimage / 2 + hpitch;
507 } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
508 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
509 common->ytop_off = 0;
510 common->ybtm_off = sizeimage / 4;
511 common->ctop_off = sizeimage / 2;
512 common->cbtm_off = common->ctop_off + sizeimage / 4;
513 } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
514 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
515 common->ybtm_off = 0;
516 common->ytop_off = sizeimage / 4;
517 common->cbtm_off = sizeimage / 2;
518 common->ctop_off = common->cbtm_off + sizeimage / 4;
519 }
520 if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
521 (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
522 vpifparams->video_params.storage_mode = 1;
523 else
524 vpifparams->video_params.storage_mode = 0;
525
526 if (1 == vpifparams->std_info.frm_fmt)
527 vpifparams->video_params.hpitch =
528 common->fmt.fmt.pix.bytesperline;
529 else {
530 if ((field == V4L2_FIELD_ANY)
531 || (field == V4L2_FIELD_INTERLACED))
532 vpifparams->video_params.hpitch =
533 common->fmt.fmt.pix.bytesperline * 2;
534 else
535 vpifparams->video_params.hpitch =
536 common->fmt.fmt.pix.bytesperline;
537 }
538
539 ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
540}
541
542/**
543 * vpif_config_format: configure default frame format in the device
544 * ch : ptr to channel object
545 */
546static void vpif_config_format(struct channel_obj *ch)
547{
548 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
549
550 vpif_dbg(2, debug, "vpif_config_format\n");
551
552 common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
553 if (config_params.numbuffers[ch->channel_id] == 0)
554 common->memory = V4L2_MEMORY_USERPTR;
555 else
556 common->memory = V4L2_MEMORY_MMAP;
557
558 common->fmt.fmt.pix.sizeimage
559 = config_params.channel_bufsize[ch->channel_id];
560
561 if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
562 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
563 else
564 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
565 common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
566}
567
568/**
569 * vpif_get_default_field() - Get default field type based on interface
570 * @vpif_params - ptr to vpif params
571 */
572static inline enum v4l2_field vpif_get_default_field(
573 struct vpif_interface *iface)
574{
575 return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
576 V4L2_FIELD_INTERLACED;
577}
578
579/**
580 * vpif_check_format() - check given pixel format for compatibility
581 * @ch - channel ptr
582 * @pixfmt - Given pixel format
583 * @update - update the values as per hardware requirement
584 *
585 * Check the application pixel format for S_FMT and update the input
586 * values as per hardware limits for TRY_FMT. The default pixel and
587 * field format is selected based on interface type.
588 */
589static int vpif_check_format(struct channel_obj *ch,
590 struct v4l2_pix_format *pixfmt,
591 int update)
592{
593 struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
594 struct vpif_params *vpif_params = &ch->vpifparams;
595 enum v4l2_field field = pixfmt->field;
596 u32 sizeimage, hpitch, vpitch;
597 int ret = -EINVAL;
598
599 vpif_dbg(2, debug, "vpif_check_format\n");
600 /**
601 * first check for the pixel format. If if_type is Raw bayer,
602 * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only
603 * V4L2_PIX_FMT_YUV422P is supported
604 */
605 if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
606 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) {
607 if (!update) {
608 vpif_dbg(2, debug, "invalid pix format\n");
609 goto exit;
610 }
611 pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
612 }
613 } else {
614 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) {
615 if (!update) {
616 vpif_dbg(2, debug, "invalid pixel format\n");
617 goto exit;
618 }
619 pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
620 }
621 }
622
623 if (!(VPIF_VALID_FIELD(field))) {
624 if (!update) {
625 vpif_dbg(2, debug, "invalid field format\n");
626 goto exit;
627 }
628 /**
629 * By default use FIELD_NONE for RAW Bayer capture
630 * and FIELD_INTERLACED for other interfaces
631 */
632 field = vpif_get_default_field(&vpif_params->iface);
633 } else if (field == V4L2_FIELD_ANY)
634 /* unsupported field. Use default */
635 field = vpif_get_default_field(&vpif_params->iface);
636
637 /* validate the hpitch */
638 hpitch = pixfmt->bytesperline;
639 if (hpitch < vpif_params->std_info.width) {
640 if (!update) {
641 vpif_dbg(2, debug, "invalid hpitch\n");
642 goto exit;
643 }
644 hpitch = vpif_params->std_info.width;
645 }
646
647 if (V4L2_MEMORY_USERPTR == common->memory)
648 sizeimage = pixfmt->sizeimage;
649 else
650 sizeimage = config_params.channel_bufsize[ch->channel_id];
651
652 vpitch = sizeimage / (hpitch * 2);
653
654 /* validate the vpitch */
655 if (vpitch < vpif_params->std_info.height) {
656 if (!update) {
657 vpif_dbg(2, debug, "Invalid vpitch\n");
658 goto exit;
659 }
660 vpitch = vpif_params->std_info.height;
661 }
662
663 /* Check for 8 byte alignment */
664 if (!ALIGN(hpitch, 8)) {
665 if (!update) {
666 vpif_dbg(2, debug, "invalid pitch alignment\n");
667 goto exit;
668 }
669 /* adjust to next 8 byte boundary */
670 hpitch = (((hpitch + 7) / 8) * 8);
671 }
672 /* if update is set, modify the bytesperline and sizeimage */
673 if (update) {
674 pixfmt->bytesperline = hpitch;
675 pixfmt->sizeimage = hpitch * vpitch * 2;
676 }
677 /**
678 * Image width and height is always based on current standard width and
679 * height
680 */
681 pixfmt->width = common->fmt.fmt.pix.width;
682 pixfmt->height = common->fmt.fmt.pix.height;
683 return 0;
684exit:
685 return ret;
686}
687
688/**
689 * vpif_config_addr() - function to configure buffer address in vpif
690 * @ch - channel ptr
691 * @muxmode - channel mux mode
692 */
693static void vpif_config_addr(struct channel_obj *ch, int muxmode)
694{
695 struct common_obj *common;
696
697 vpif_dbg(2, debug, "vpif_config_addr\n");
698
699 common = &(ch->common[VPIF_VIDEO_INDEX]);
700
701 if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
702 common->set_addr = ch1_set_videobuf_addr;
703 else if (2 == muxmode)
704 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
705 else
706 common->set_addr = ch0_set_videobuf_addr;
707}
708
709/**
710 * vpfe_mmap : It is used to map kernel space buffers into user spaces
711 * @filep: file pointer
712 * @vma: ptr to vm_area_struct
713 */
714static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
715{
716 /* Get the channel object and file handle object */
717 struct vpif_fh *fh = filep->private_data;
718 struct channel_obj *ch = fh->channel;
719 struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
720
721 vpif_dbg(2, debug, "vpif_mmap\n");
722
723 return videobuf_mmap_mapper(&common->buffer_queue, vma);
724}
725
726/**
727 * vpif_poll: It is used for select/poll system call
728 * @filep: file pointer
729 * @wait: poll table to wait
730 */
731static unsigned int vpif_poll(struct file *filep, poll_table * wait)
732{
733 int err = 0;
734 struct vpif_fh *fh = filep->private_data;
735 struct channel_obj *channel = fh->channel;
736 struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]);
737
738 vpif_dbg(2, debug, "vpif_poll\n");
739
740 if (common->started)
741 err = videobuf_poll_stream(filep, &common->buffer_queue, wait);
742
743 return 0;
744}
745
746/**
747 * vpif_open : vpif open handler
748 * @filep: file ptr
749 *
750 * It creates object of file handle structure and stores it in private_data
751 * member of filepointer
752 */
753static int vpif_open(struct file *filep)
754{
755 struct vpif_capture_config *config = vpif_dev->platform_data;
756 struct video_device *vdev = video_devdata(filep);
757 struct common_obj *common;
758 struct video_obj *vid_ch;
759 struct channel_obj *ch;
760 struct vpif_fh *fh;
761 int i, ret = 0;
762
763 vpif_dbg(2, debug, "vpif_open\n");
764
765 ch = video_get_drvdata(vdev);
766
767 vid_ch = &ch->video;
768 common = &ch->common[VPIF_VIDEO_INDEX];
769
770 if (mutex_lock_interruptible(&common->lock))
771 return -ERESTARTSYS;
772
773 if (NULL == ch->curr_subdev_info) {
774 /**
775 * search through the sub device to see a registered
776 * sub device and make it as current sub device
777 */
778 for (i = 0; i < config->subdev_count; i++) {
779 if (vpif_obj.sd[i]) {
780 /* the sub device is registered */
781 ch->curr_subdev_info = &config->subdev_info[i];
782 /* make first input as the current input */
783 vid_ch->input_idx = 0;
784 break;
785 }
786 }
787 if (i == config->subdev_count) {
788 vpif_err("No sub device registered\n");
789 ret = -ENOENT;
790 goto exit;
791 }
792 }
793
794 /* Allocate memory for the file handle object */
795 fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL);
796 if (NULL == fh) {
797 vpif_err("unable to allocate memory for file handle object\n");
798 ret = -ENOMEM;
799 goto exit;
800 }
801
802 /* store pointer to fh in private_data member of filep */
803 filep->private_data = fh;
804 fh->channel = ch;
805 fh->initialized = 0;
806 /* If decoder is not initialized. initialize it */
807 if (!ch->initialized) {
808 fh->initialized = 1;
809 ch->initialized = 1;
810 memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
811 }
812 /* Increment channel usrs counter */
813 ch->usrs++;
814 /* Set io_allowed member to false */
815 fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
816 /* Initialize priority of this instance to default priority */
817 fh->prio = V4L2_PRIORITY_UNSET;
818 v4l2_prio_open(&ch->prio, &fh->prio);
819exit:
820 mutex_unlock(&common->lock);
821 return ret;
822}
823
824/**
825 * vpif_release : function to clean up file close
826 * @filep: file pointer
827 *
828 * This function deletes buffer queue, frees the buffers and the vpfe file
829 * handle
830 */
831static int vpif_release(struct file *filep)
832{
833 struct vpif_fh *fh = filep->private_data;
834 struct channel_obj *ch = fh->channel;
835 struct common_obj *common;
836
837 vpif_dbg(2, debug, "vpif_release\n");
838
839 common = &ch->common[VPIF_VIDEO_INDEX];
840
841 if (mutex_lock_interruptible(&common->lock))
842 return -ERESTARTSYS;
843
844 /* if this instance is doing IO */
845 if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
846 /* Reset io_usrs member of channel object */
847 common->io_usrs = 0;
848 /* Disable channel as per its device type and channel id */
849 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
850 enable_channel0(0);
851 channel0_intr_enable(0);
852 }
853 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
854 (2 == common->started)) {
855 enable_channel1(0);
856 channel1_intr_enable(0);
857 }
858 common->started = 0;
859 /* Free buffers allocated */
860 videobuf_queue_cancel(&common->buffer_queue);
861 videobuf_mmap_free(&common->buffer_queue);
862 }
863
864 /* Decrement channel usrs counter */
865 ch->usrs--;
866
867 /* unlock mutex on channel object */
868 mutex_unlock(&common->lock);
869
870 /* Close the priority */
871 v4l2_prio_close(&ch->prio, &fh->prio);
872
873 if (fh->initialized)
874 ch->initialized = 0;
875
876 filep->private_data = NULL;
877 kfree(fh);
878 return 0;
879}
880
881/**
882 * vpif_reqbufs() - request buffer handler
883 * @file: file ptr
884 * @priv: file handle
885 * @reqbuf: request buffer structure ptr
886 */
887static int vpif_reqbufs(struct file *file, void *priv,
888 struct v4l2_requestbuffers *reqbuf)
889{
890 struct vpif_fh *fh = priv;
891 struct channel_obj *ch = fh->channel;
892 struct common_obj *common;
893 u8 index = 0;
894 int ret = 0;
895
896 vpif_dbg(2, debug, "vpif_reqbufs\n");
897
898 /**
899 * This file handle has not initialized the channel,
900 * It is not allowed to do settings
901 */
902 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)
903 || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
904 if (!fh->initialized) {
905 vpif_dbg(1, debug, "Channel Busy\n");
906 return -EBUSY;
907 }
908 }
909
910 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type)
911 return -EINVAL;
912
913 index = VPIF_VIDEO_INDEX;
914
915 common = &ch->common[index];
916
917 if (mutex_lock_interruptible(&common->lock))
918 return -ERESTARTSYS;
919
920 if (0 != common->io_usrs) {
921 ret = -EBUSY;
922 goto reqbuf_exit;
923 }
924
925 /* Initialize videobuf queue as per the buffer type */
926 videobuf_queue_dma_contig_init(&common->buffer_queue,
927 &video_qops, NULL,
928 &common->irqlock,
929 reqbuf->type,
930 common->fmt.fmt.pix.field,
931 sizeof(struct videobuf_buffer), fh);
932
933 /* Set io allowed member of file handle to TRUE */
934 fh->io_allowed[index] = 1;
935 /* Increment io usrs member of channel object to 1 */
936 common->io_usrs = 1;
937 /* Store type of memory requested in channel object */
938 common->memory = reqbuf->memory;
939 INIT_LIST_HEAD(&common->dma_queue);
940
941 /* Allocate buffers */
942 ret = videobuf_reqbufs(&common->buffer_queue, reqbuf);
943
944reqbuf_exit:
945 mutex_unlock(&common->lock);
946 return ret;
947}
948
949/**
950 * vpif_querybuf() - query buffer handler
951 * @file: file ptr
952 * @priv: file handle
953 * @buf: v4l2 buffer structure ptr
954 */
955static int vpif_querybuf(struct file *file, void *priv,
956 struct v4l2_buffer *buf)
957{
958 struct vpif_fh *fh = priv;
959 struct channel_obj *ch = fh->channel;
960 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
961
962 vpif_dbg(2, debug, "vpif_querybuf\n");
963
964 if (common->fmt.type != buf->type)
965 return -EINVAL;
966
967 if (common->memory != V4L2_MEMORY_MMAP) {
968 vpif_dbg(1, debug, "Invalid memory\n");
969 return -EINVAL;
970 }
971
972 return videobuf_querybuf(&common->buffer_queue, buf);
973}
974
975/**
976 * vpif_qbuf() - query buffer handler
977 * @file: file ptr
978 * @priv: file handle
979 * @buf: v4l2 buffer structure ptr
980 */
981static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
982{
983
984 struct vpif_fh *fh = priv;
985 struct channel_obj *ch = fh->channel;
986 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
987 struct v4l2_buffer tbuf = *buf;
988 struct videobuf_buffer *buf1;
989 unsigned long addr = 0;
990 unsigned long flags;
991 int ret = 0;
992
993 vpif_dbg(2, debug, "vpif_qbuf\n");
994
995 if (common->fmt.type != tbuf.type) {
996 vpif_err("invalid buffer type\n");
997 return -EINVAL;
998 }
999
1000 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1001 vpif_err("fh io not allowed \n");
1002 return -EACCES;
1003 }
1004
1005 if (!(list_empty(&common->dma_queue)) ||
1006 (common->cur_frm != common->next_frm) ||
1007 !common->started ||
1008 (common->started && (0 == ch->field_id)))
1009 return videobuf_qbuf(&common->buffer_queue, buf);
1010
1011 /* bufferqueue is empty store buffer address in VPIF registers */
1012 mutex_lock(&common->buffer_queue.vb_lock);
1013 buf1 = common->buffer_queue.bufs[tbuf.index];
1014
1015 if ((buf1->state == VIDEOBUF_QUEUED) ||
1016 (buf1->state == VIDEOBUF_ACTIVE)) {
1017 vpif_err("invalid state\n");
1018 goto qbuf_exit;
1019 }
1020
1021 switch (buf1->memory) {
1022 case V4L2_MEMORY_MMAP:
1023 if (buf1->baddr == 0)
1024 goto qbuf_exit;
1025 break;
1026
1027 case V4L2_MEMORY_USERPTR:
1028 if (tbuf.length < buf1->bsize)
1029 goto qbuf_exit;
1030
1031 if ((VIDEOBUF_NEEDS_INIT != buf1->state)
1032 && (buf1->baddr != tbuf.m.userptr))
1033 vpif_buffer_release(&common->buffer_queue, buf1);
1034 buf1->baddr = tbuf.m.userptr;
1035 break;
1036
1037 default:
1038 goto qbuf_exit;
1039 }
1040
1041 local_irq_save(flags);
1042 ret = vpif_buffer_prepare(&common->buffer_queue, buf1,
1043 common->buffer_queue.field);
1044 if (ret < 0) {
1045 local_irq_restore(flags);
1046 goto qbuf_exit;
1047 }
1048
1049 buf1->state = VIDEOBUF_ACTIVE;
1050
1051 if (V4L2_MEMORY_USERPTR == common->memory)
1052 addr = buf1->boff;
1053 else
1054 addr = videobuf_to_dma_contig(buf1);
1055
1056 common->next_frm = buf1;
1057 common->set_addr(addr + common->ytop_off,
1058 addr + common->ybtm_off,
1059 addr + common->ctop_off,
1060 addr + common->cbtm_off);
1061
1062 local_irq_restore(flags);
1063 list_add_tail(&buf1->stream, &common->buffer_queue.stream);
1064 mutex_unlock(&common->buffer_queue.vb_lock);
1065 return 0;
1066
1067qbuf_exit:
1068 mutex_unlock(&common->buffer_queue.vb_lock);
1069 return -EINVAL;
1070}
1071
1072/**
1073 * vpif_dqbuf() - query buffer handler
1074 * @file: file ptr
1075 * @priv: file handle
1076 * @buf: v4l2 buffer structure ptr
1077 */
1078static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1079{
1080 struct vpif_fh *fh = priv;
1081 struct channel_obj *ch = fh->channel;
1082 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1083
1084 vpif_dbg(2, debug, "vpif_dqbuf\n");
1085
1086 return videobuf_dqbuf(&common->buffer_queue, buf,
1087 file->f_flags & O_NONBLOCK);
1088}
1089
1090/**
1091 * vpif_streamon() - streamon handler
1092 * @file: file ptr
1093 * @priv: file handle
1094 * @buftype: v4l2 buffer type
1095 */
1096static int vpif_streamon(struct file *file, void *priv,
1097 enum v4l2_buf_type buftype)
1098{
1099
1100 struct vpif_capture_config *config = vpif_dev->platform_data;
1101 struct vpif_fh *fh = priv;
1102 struct channel_obj *ch = fh->channel;
1103 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1104 struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1105 struct vpif_params *vpif;
1106 unsigned long addr = 0;
1107 int ret = 0;
1108
1109 vpif_dbg(2, debug, "vpif_streamon\n");
1110
1111 vpif = &ch->vpifparams;
1112
1113 if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1114 vpif_dbg(1, debug, "buffer type not supported\n");
1115 return -EINVAL;
1116 }
1117
1118 /* If file handle is not allowed IO, return error */
1119 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1120 vpif_dbg(1, debug, "io not allowed\n");
1121 return -EACCES;
1122 }
1123
1124 /* If Streaming is already started, return error */
1125 if (common->started) {
1126 vpif_dbg(1, debug, "channel->started\n");
1127 return -EBUSY;
1128 }
1129
1130 if ((ch->channel_id == VPIF_CHANNEL0_VIDEO &&
1131 oth_ch->common[VPIF_VIDEO_INDEX].started &&
1132 vpif->std_info.ycmux_mode == 0) ||
1133 ((ch->channel_id == VPIF_CHANNEL1_VIDEO) &&
1134 (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1135 vpif_dbg(1, debug, "other channel is being used\n");
1136 return -EBUSY;
1137 }
1138
1139 ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0);
1140 if (ret)
1141 return ret;
1142
1143 /* Enable streamon on the sub device */
1144 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
1145 s_stream, 1);
1146
1147 if (ret && (ret != -ENOIOCTLCMD)) {
1148 vpif_dbg(1, debug, "stream on failed in subdev\n");
1149 return ret;
1150 }
1151
1152 /* Call videobuf_streamon to start streaming in videobuf */
1153 ret = videobuf_streamon(&common->buffer_queue);
1154 if (ret) {
1155 vpif_dbg(1, debug, "videobuf_streamon\n");
1156 return ret;
1157 }
1158
1159 if (mutex_lock_interruptible(&common->lock)) {
1160 ret = -ERESTARTSYS;
1161 goto streamoff_exit;
1162 }
1163
1164 /* If buffer queue is empty, return error */
1165 if (list_empty(&common->dma_queue)) {
1166 vpif_dbg(1, debug, "buffer queue is empty\n");
1167 ret = -EIO;
1168 goto exit;
1169 }
1170
1171 /* Get the next frame from the buffer queue */
1172 common->cur_frm = list_entry(common->dma_queue.next,
1173 struct videobuf_buffer, queue);
1174 common->next_frm = common->cur_frm;
1175
1176 /* Remove buffer from the buffer queue */
1177 list_del(&common->cur_frm->queue);
1178 /* Mark state of the current frame to active */
1179 common->cur_frm->state = VIDEOBUF_ACTIVE;
1180 /* Initialize field_id and started member */
1181 ch->field_id = 0;
1182 common->started = 1;
1183
1184 if (V4L2_MEMORY_USERPTR == common->memory)
1185 addr = common->cur_frm->boff;
1186 else
1187 addr = videobuf_to_dma_contig(common->cur_frm);
1188
1189 /* Calculate the offset for Y and C data in the buffer */
1190 vpif_calculate_offsets(ch);
1191
1192 if ((vpif->std_info.frm_fmt &&
1193 ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) &&
1194 (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) ||
1195 (!vpif->std_info.frm_fmt &&
1196 (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
1197 vpif_dbg(1, debug, "conflict in field format and std format\n");
1198 ret = -EINVAL;
1199 goto exit;
1200 }
1201
1202 /* configure 1 or 2 channel mode */
1203 ret = config->setup_input_channel_mode(vpif->std_info.ycmux_mode);
1204
1205 if (ret < 0) {
1206 vpif_dbg(1, debug, "can't set vpif channel mode\n");
1207 goto exit;
1208 }
1209
1210 /* Call vpif_set_params function to set the parameters and addresses */
1211 ret = vpif_set_video_params(vpif, ch->channel_id);
1212
1213 if (ret < 0) {
1214 vpif_dbg(1, debug, "can't set video params\n");
1215 goto exit;
1216 }
1217
1218 common->started = ret;
1219 vpif_config_addr(ch, ret);
1220
1221 common->set_addr(addr + common->ytop_off,
1222 addr + common->ybtm_off,
1223 addr + common->ctop_off,
1224 addr + common->cbtm_off);
1225
1226 /**
1227 * Set interrupt for both the fields in VPIF Register enable channel in
1228 * VPIF register
1229 */
1230 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) {
1231 channel0_intr_assert();
1232 channel0_intr_enable(1);
1233 enable_channel0(1);
1234 }
1235 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
1236 (common->started == 2)) {
1237 channel1_intr_assert();
1238 channel1_intr_enable(1);
1239 enable_channel1(1);
1240 }
1241 channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
1242 mutex_unlock(&common->lock);
1243 return ret;
1244
1245exit:
1246 mutex_unlock(&common->lock);
1247streamoff_exit:
1248 ret = videobuf_streamoff(&common->buffer_queue);
1249 return ret;
1250}
1251
1252/**
1253 * vpif_streamoff() - streamoff handler
1254 * @file: file ptr
1255 * @priv: file handle
1256 * @buftype: v4l2 buffer type
1257 */
1258static int vpif_streamoff(struct file *file, void *priv,
1259 enum v4l2_buf_type buftype)
1260{
1261
1262 struct vpif_fh *fh = priv;
1263 struct channel_obj *ch = fh->channel;
1264 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1265 int ret;
1266
1267 vpif_dbg(2, debug, "vpif_streamoff\n");
1268
1269 if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1270 vpif_dbg(1, debug, "buffer type not supported\n");
1271 return -EINVAL;
1272 }
1273
1274 /* If io is allowed for this file handle, return error */
1275 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1276 vpif_dbg(1, debug, "io not allowed\n");
1277 return -EACCES;
1278 }
1279
1280 /* If streaming is not started, return error */
1281 if (!common->started) {
1282 vpif_dbg(1, debug, "channel->started\n");
1283 return -EINVAL;
1284 }
1285
1286 if (mutex_lock_interruptible(&common->lock))
1287 return -ERESTARTSYS;
1288
1289 /* disable channel */
1290 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
1291 enable_channel0(0);
1292 channel0_intr_enable(0);
1293 } else {
1294 enable_channel1(0);
1295 channel1_intr_enable(0);
1296 }
1297
1298 common->started = 0;
1299
1300 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
1301 s_stream, 0);
1302
1303 if (ret && (ret != -ENOIOCTLCMD))
1304 vpif_dbg(1, debug, "stream off failed in subdev\n");
1305
1306 mutex_unlock(&common->lock);
1307
1308 return videobuf_streamoff(&common->buffer_queue);
1309}
1310
1311/**
1312 * vpif_map_sub_device_to_input() - Maps sub device to input
1313 * @ch - ptr to channel
1314 * @config - ptr to capture configuration
1315 * @input_index - Given input index from application
1316 * @sub_device_index - index into sd table
1317 *
1318 * lookup the sub device information for a given input index.
1319 * we report all the inputs to application. inputs table also
1320 * has sub device name for the each input
1321 */
1322static struct vpif_subdev_info *vpif_map_sub_device_to_input(
1323 struct channel_obj *ch,
1324 struct vpif_capture_config *vpif_cfg,
1325 int input_index,
1326 int *sub_device_index)
1327{
1328 struct vpif_capture_chan_config *chan_cfg;
1329 struct vpif_subdev_info *subdev_info = NULL;
1330 const char *subdev_name = NULL;
1331 int i;
1332
1333 vpif_dbg(2, debug, "vpif_map_sub_device_to_input\n");
1334
1335 chan_cfg = &vpif_cfg->chan_config[ch->channel_id];
1336
1337 /**
1338 * search through the inputs to find the sub device supporting
1339 * the input
1340 */
1341 for (i = 0; i < chan_cfg->input_count; i++) {
1342 /* For each sub device, loop through input */
1343 if (i == input_index) {
1344 subdev_name = chan_cfg->inputs[i].subdev_name;
1345 break;
1346 }
1347 }
1348
1349 /* if reached maximum. return null */
1350 if (i == chan_cfg->input_count || (NULL == subdev_name))
1351 return subdev_info;
1352
1353 /* loop through the sub device list to get the sub device info */
1354 for (i = 0; i < vpif_cfg->subdev_count; i++) {
1355 subdev_info = &vpif_cfg->subdev_info[i];
1356 if (!strcmp(subdev_info->name, subdev_name))
1357 break;
1358 }
1359
1360 if (i == vpif_cfg->subdev_count)
1361 return subdev_info;
1362
1363 /* check if the sub device is registered */
1364 if (NULL == vpif_obj.sd[i])
1365 return NULL;
1366
1367 *sub_device_index = i;
1368 return subdev_info;
1369}
1370
1371/**
1372 * vpif_querystd() - querystd handler
1373 * @file: file ptr
1374 * @priv: file handle
1375 * @std_id: ptr to std id
1376 *
1377 * This function is called to detect standard at the selected input
1378 */
1379static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1380{
1381 struct vpif_fh *fh = priv;
1382 struct channel_obj *ch = fh->channel;
1383 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1384 int ret = 0;
1385
1386 vpif_dbg(2, debug, "vpif_querystd\n");
1387
1388 if (mutex_lock_interruptible(&common->lock))
1389 return -ERESTARTSYS;
1390
1391 /* Call querystd function of decoder device */
1392 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
1393 querystd, std_id);
1394 if (ret < 0)
1395 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
1396
1397 mutex_unlock(&common->lock);
1398 return ret;
1399}
1400
1401/**
1402 * vpif_g_std() - get STD handler
1403 * @file: file ptr
1404 * @priv: file handle
1405 * @std_id: ptr to std id
1406 */
1407static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1408{
1409 struct vpif_fh *fh = priv;
1410 struct channel_obj *ch = fh->channel;
1411
1412 vpif_dbg(2, debug, "vpif_g_std\n");
1413
1414 *std = ch->video.stdid;
1415 return 0;
1416}
1417
1418/**
1419 * vpif_s_std() - set STD handler
1420 * @file: file ptr
1421 * @priv: file handle
1422 * @std_id: ptr to std id
1423 */
1424static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1425{
1426 struct vpif_fh *fh = priv;
1427 struct channel_obj *ch = fh->channel;
1428 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1429 int ret = 0;
1430
1431 vpif_dbg(2, debug, "vpif_s_std\n");
1432
1433 if (common->started) {
1434 vpif_err("streaming in progress\n");
1435 return -EBUSY;
1436 }
1437
1438 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1439 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1440 if (!fh->initialized) {
1441 vpif_dbg(1, debug, "Channel Busy\n");
1442 return -EBUSY;
1443 }
1444 }
1445
1446 ret = v4l2_prio_check(&ch->prio, &fh->prio);
1447 if (0 != ret)
1448 return ret;
1449
1450 fh->initialized = 1;
1451
1452 /* Call encoder subdevice function to set the standard */
1453 if (mutex_lock_interruptible(&common->lock))
1454 return -ERESTARTSYS;
1455
1456 ch->video.stdid = *std_id;
1457
1458 /* Get the information about the standard */
1459 if (vpif_update_std_info(ch)) {
1460 ret = -EINVAL;
1461 vpif_err("Error getting the standard info\n");
1462 goto s_std_exit;
1463 }
1464
1465 /* Configure the default format information */
1466 vpif_config_format(ch);
1467
1468 /* set standard in the sub device */
1469 ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], core,
1470 s_std, *std_id);
1471 if (ret < 0)
1472 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
1473
1474s_std_exit:
1475 mutex_unlock(&common->lock);
1476 return ret;
1477}
1478
1479/**
1480 * vpif_enum_input() - ENUMINPUT handler
1481 * @file: file ptr
1482 * @priv: file handle
1483 * @input: ptr to input structure
1484 */
1485static int vpif_enum_input(struct file *file, void *priv,
1486 struct v4l2_input *input)
1487{
1488
1489 struct vpif_capture_config *config = vpif_dev->platform_data;
1490 struct vpif_capture_chan_config *chan_cfg;
1491 struct vpif_fh *fh = priv;
1492 struct channel_obj *ch = fh->channel;
1493
1494 chan_cfg = &config->chan_config[ch->channel_id];
1495
1496 if (input->index >= chan_cfg->input_count) {
1497 vpif_dbg(1, debug, "Invalid input index\n");
1498 return -EINVAL;
1499 }
1500
1501 memcpy(input, &chan_cfg->inputs[input->index].input,
1502 sizeof(*input));
1503 return 0;
1504}
1505
1506/**
1507 * vpif_g_input() - Get INPUT handler
1508 * @file: file ptr
1509 * @priv: file handle
1510 * @index: ptr to input index
1511 */
1512static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
1513{
1514 struct vpif_fh *fh = priv;
1515 struct channel_obj *ch = fh->channel;
1516 struct video_obj *vid_ch = &ch->video;
1517
1518 *index = vid_ch->input_idx;
1519
1520 return 0;
1521}
1522
1523/**
1524 * vpif_s_input() - Set INPUT handler
1525 * @file: file ptr
1526 * @priv: file handle
1527 * @index: input index
1528 */
1529static int vpif_s_input(struct file *file, void *priv, unsigned int index)
1530{
1531 struct vpif_capture_config *config = vpif_dev->platform_data;
1532 struct vpif_capture_chan_config *chan_cfg;
1533 struct vpif_fh *fh = priv;
1534 struct channel_obj *ch = fh->channel;
1535 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1536 struct video_obj *vid_ch = &ch->video;
1537 struct vpif_subdev_info *subdev_info;
1538 int ret = 0, sd_index = 0;
1539 u32 input = 0, output = 0;
1540
1541 chan_cfg = &config->chan_config[ch->channel_id];
1542
1543 if (common->started) {
1544 vpif_err("Streaming in progress\n");
1545 return -EBUSY;
1546 }
1547
1548 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1549 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1550 if (!fh->initialized) {
1551 vpif_dbg(1, debug, "Channel Busy\n");
1552 return -EBUSY;
1553 }
1554 }
1555
1556 ret = v4l2_prio_check(&ch->prio, &fh->prio);
1557 if (0 != ret)
1558 return ret;
1559
1560 fh->initialized = 1;
1561 subdev_info = vpif_map_sub_device_to_input(ch, config, index,
1562 &sd_index);
1563 if (NULL == subdev_info) {
1564 vpif_dbg(1, debug,
1565 "couldn't lookup sub device for the input index\n");
1566 return -EINVAL;
1567 }
1568
1569 if (mutex_lock_interruptible(&common->lock))
1570 return -ERESTARTSYS;
1571
1572 /* first setup input path from sub device to vpif */
1573 if (config->setup_input_path) {
1574 ret = config->setup_input_path(ch->channel_id,
1575 subdev_info->name);
1576 if (ret < 0) {
1577 vpif_dbg(1, debug, "couldn't setup input path for the"
1578 " sub device %s, for input index %d\n",
1579 subdev_info->name, index);
1580 goto exit;
1581 }
1582 }
1583
1584 if (subdev_info->can_route) {
1585 input = subdev_info->input;
1586 output = subdev_info->output;
1587 ret = v4l2_subdev_call(vpif_obj.sd[sd_index], video, s_routing,
1588 input, output, 0);
1589 if (ret < 0) {
1590 vpif_dbg(1, debug, "Failed to set input\n");
1591 goto exit;
1592 }
1593 }
1594 vid_ch->input_idx = index;
1595 ch->curr_subdev_info = subdev_info;
1596 ch->curr_sd_index = sd_index;
1597 /* copy interface parameters to vpif */
1598 ch->vpifparams.iface = subdev_info->vpif_if;
1599
1600 /* update tvnorms from the sub device input info */
1601 ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
1602
1603exit:
1604 mutex_unlock(&common->lock);
1605 return ret;
1606}
1607
1608/**
1609 * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
1610 * @file: file ptr
1611 * @priv: file handle
1612 * @index: input index
1613 */
1614static int vpif_enum_fmt_vid_cap(struct file *file, void *priv,
1615 struct v4l2_fmtdesc *fmt)
1616{
1617 struct vpif_fh *fh = priv;
1618 struct channel_obj *ch = fh->channel;
1619
1620 if (fmt->index != 0) {
1621 vpif_dbg(1, debug, "Invalid format index\n");
1622 return -EINVAL;
1623 }
1624
1625 /* Fill in the information about format */
1626 if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
1627 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1628 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
1629 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
1630 } else {
1631 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1632 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
1633 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
1634 }
1635 return 0;
1636}
1637
1638/**
1639 * vpif_try_fmt_vid_cap() - TRY_FMT handler
1640 * @file: file ptr
1641 * @priv: file handle
1642 * @fmt: ptr to v4l2 format structure
1643 */
1644static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
1645 struct v4l2_format *fmt)
1646{
1647 struct vpif_fh *fh = priv;
1648 struct channel_obj *ch = fh->channel;
1649 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
1650
1651 return vpif_check_format(ch, pixfmt, 1);
1652}
1653
1654
1655/**
1656 * vpif_g_fmt_vid_cap() - Set INPUT handler
1657 * @file: file ptr
1658 * @priv: file handle
1659 * @fmt: ptr to v4l2 format structure
1660 */
1661static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
1662 struct v4l2_format *fmt)
1663{
1664 struct vpif_fh *fh = priv;
1665 struct channel_obj *ch = fh->channel;
1666 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1667
1668 /* Check the validity of the buffer type */
1669 if (common->fmt.type != fmt->type)
1670 return -EINVAL;
1671
1672 /* Fill in the information about format */
1673 if (mutex_lock_interruptible(&common->lock))
1674 return -ERESTARTSYS;
1675
1676 *fmt = common->fmt;
1677 mutex_unlock(&common->lock);
1678 return 0;
1679}
1680
1681/**
1682 * vpif_s_fmt_vid_cap() - Set FMT handler
1683 * @file: file ptr
1684 * @priv: file handle
1685 * @fmt: ptr to v4l2 format structure
1686 */
1687static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
1688 struct v4l2_format *fmt)
1689{
1690 struct vpif_fh *fh = priv;
1691 struct channel_obj *ch = fh->channel;
1692 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1693 struct v4l2_pix_format *pixfmt;
1694 int ret = 0;
1695
1696 vpif_dbg(2, debug, "VIDIOC_S_FMT\n");
1697
1698 /* If streaming is started, return error */
1699 if (common->started) {
1700 vpif_dbg(1, debug, "Streaming is started\n");
1701 return -EBUSY;
1702 }
1703
1704 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1705 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1706 if (!fh->initialized) {
1707 vpif_dbg(1, debug, "Channel Busy\n");
1708 return -EBUSY;
1709 }
1710 }
1711
1712 ret = v4l2_prio_check(&ch->prio, &fh->prio);
1713 if (0 != ret)
1714 return ret;
1715
1716 fh->initialized = 1;
1717
1718 pixfmt = &fmt->fmt.pix;
1719 /* Check for valid field format */
1720 ret = vpif_check_format(ch, pixfmt, 0);
1721
1722 if (ret)
1723 return ret;
1724 /* store the format in the channel object */
1725 if (mutex_lock_interruptible(&common->lock))
1726 return -ERESTARTSYS;
1727
1728 common->fmt = *fmt;
1729 mutex_unlock(&common->lock);
1730
1731 return 0;
1732}
1733
1734/**
1735 * vpif_querycap() - QUERYCAP handler
1736 * @file: file ptr
1737 * @priv: file handle
1738 * @cap: ptr to v4l2_capability structure
1739 */
1740static int vpif_querycap(struct file *file, void *priv,
1741 struct v4l2_capability *cap)
1742{
1743 struct vpif_capture_config *config = vpif_dev->platform_data;
1744
1745 cap->version = VPIF_CAPTURE_VERSION_CODE;
1746 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1747 strlcpy(cap->driver, "vpif capture", sizeof(cap->driver));
1748 strlcpy(cap->bus_info, "DM646x Platform", sizeof(cap->bus_info));
1749 strlcpy(cap->card, config->card_name, sizeof(cap->card));
1750
1751 return 0;
1752}
1753
1754/**
1755 * vpif_g_priority() - get priority handler
1756 * @file: file ptr
1757 * @priv: file handle
1758 * @prio: ptr to v4l2_priority structure
1759 */
1760static int vpif_g_priority(struct file *file, void *priv,
1761 enum v4l2_priority *prio)
1762{
1763 struct vpif_fh *fh = priv;
1764 struct channel_obj *ch = fh->channel;
1765
1766 *prio = v4l2_prio_max(&ch->prio);
1767
1768 return 0;
1769}
1770
1771/**
1772 * vpif_s_priority() - set priority handler
1773 * @file: file ptr
1774 * @priv: file handle
1775 * @prio: ptr to v4l2_priority structure
1776 */
1777static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1778{
1779 struct vpif_fh *fh = priv;
1780 struct channel_obj *ch = fh->channel;
1781
1782 return v4l2_prio_change(&ch->prio, &fh->prio, p);
1783}
1784
1785/**
1786 * vpif_cropcap() - cropcap handler
1787 * @file: file ptr
1788 * @priv: file handle
1789 * @crop: ptr to v4l2_cropcap structure
1790 */
1791static int vpif_cropcap(struct file *file, void *priv,
1792 struct v4l2_cropcap *crop)
1793{
1794 struct vpif_fh *fh = priv;
1795 struct channel_obj *ch = fh->channel;
1796 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1797
1798 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type)
1799 return -EINVAL;
1800
1801 crop->bounds.left = 0;
1802 crop->bounds.top = 0;
1803 crop->bounds.height = common->height;
1804 crop->bounds.width = common->width;
1805 crop->defrect = crop->bounds;
1806 return 0;
1807}
1808
1809/* vpif capture ioctl operations */
1810static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1811 .vidioc_querycap = vpif_querycap,
1812 .vidioc_g_priority = vpif_g_priority,
1813 .vidioc_s_priority = vpif_s_priority,
1814 .vidioc_enum_fmt_vid_cap = vpif_enum_fmt_vid_cap,
1815 .vidioc_g_fmt_vid_cap = vpif_g_fmt_vid_cap,
1816 .vidioc_s_fmt_vid_cap = vpif_s_fmt_vid_cap,
1817 .vidioc_try_fmt_vid_cap = vpif_try_fmt_vid_cap,
1818 .vidioc_enum_input = vpif_enum_input,
1819 .vidioc_s_input = vpif_s_input,
1820 .vidioc_g_input = vpif_g_input,
1821 .vidioc_reqbufs = vpif_reqbufs,
1822 .vidioc_querybuf = vpif_querybuf,
1823 .vidioc_querystd = vpif_querystd,
1824 .vidioc_s_std = vpif_s_std,
1825 .vidioc_g_std = vpif_g_std,
1826 .vidioc_qbuf = vpif_qbuf,
1827 .vidioc_dqbuf = vpif_dqbuf,
1828 .vidioc_streamon = vpif_streamon,
1829 .vidioc_streamoff = vpif_streamoff,
1830 .vidioc_cropcap = vpif_cropcap,
1831};
1832
1833/* vpif file operations */
1834static struct v4l2_file_operations vpif_fops = {
1835 .owner = THIS_MODULE,
1836 .open = vpif_open,
1837 .release = vpif_release,
1838 .ioctl = video_ioctl2,
1839 .mmap = vpif_mmap,
1840 .poll = vpif_poll
1841};
1842
1843/* vpif video template */
1844static struct video_device vpif_video_template = {
1845 .name = "vpif",
1846 .fops = &vpif_fops,
1847 .minor = -1,
1848 .ioctl_ops = &vpif_ioctl_ops,
1849};
1850
1851/**
1852 * initialize_vpif() - Initialize vpif data structures
1853 *
1854 * Allocate memory for data structures and initialize them
1855 */
1856static int initialize_vpif(void)
1857{
1858 int err = 0, i, j;
1859 int free_channel_objects_index;
1860
1861 /* Default number of buffers should be 3 */
1862 if ((ch0_numbuffers > 0) &&
1863 (ch0_numbuffers < config_params.min_numbuffers))
1864 ch0_numbuffers = config_params.min_numbuffers;
1865 if ((ch1_numbuffers > 0) &&
1866 (ch1_numbuffers < config_params.min_numbuffers))
1867 ch1_numbuffers = config_params.min_numbuffers;
1868
1869 /* Set buffer size to min buffers size if it is invalid */
1870 if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO])
1871 ch0_bufsize =
1872 config_params.min_bufsize[VPIF_CHANNEL0_VIDEO];
1873 if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO])
1874 ch1_bufsize =
1875 config_params.min_bufsize[VPIF_CHANNEL1_VIDEO];
1876
1877 config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers;
1878 config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers;
1879 if (ch0_numbuffers) {
1880 config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO]
1881 = ch0_bufsize;
1882 }
1883 if (ch1_numbuffers) {
1884 config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO]
1885 = ch1_bufsize;
1886 }
1887
1888 /* Allocate memory for six channel objects */
1889 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1890 vpif_obj.dev[i] =
1891 kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1892 /* If memory allocation fails, return error */
1893 if (!vpif_obj.dev[i]) {
1894 free_channel_objects_index = i;
1895 err = -ENOMEM;
1896 goto vpif_init_free_channel_objects;
1897 }
1898 }
1899 return 0;
1900
1901vpif_init_free_channel_objects:
1902 for (j = 0; j < free_channel_objects_index; j++)
1903 kfree(vpif_obj.dev[j]);
1904 return err;
1905}
1906
1907/**
1908 * vpif_probe : This function probes the vpif capture driver
1909 * @pdev: platform device pointer
1910 *
1911 * This creates device entries by register itself to the V4L2 driver and
1912 * initializes fields of each channel objects
1913 */
1914static __init int vpif_probe(struct platform_device *pdev)
1915{
1916 struct vpif_subdev_info *subdevdata;
1917 struct vpif_capture_config *config;
1918 int i, j, k, m, q, err;
1919 struct i2c_adapter *i2c_adap;
1920 struct channel_obj *ch;
1921 struct common_obj *common;
1922 struct video_device *vfd;
1923 struct resource *res;
1924 int subdev_count;
1925
1926 vpif_dev = &pdev->dev;
1927
1928 err = initialize_vpif();
1929 if (err) {
1930 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1931 return err;
1932 }
1933
1934 k = 0;
1935 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
1936 for (i = res->start; i <= res->end; i++) {
1937 if (request_irq(i, vpif_channel_isr, IRQF_DISABLED,
1938 "DM646x_Capture",
1939 (void *)(&vpif_obj.dev[k]->channel_id))) {
1940 err = -EBUSY;
1941 i--;
1942 goto vpif_int_err;
1943 }
1944 }
1945 k++;
1946 }
1947
1948 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1949 /* Get the pointer to the channel object */
1950 ch = vpif_obj.dev[i];
1951 /* Allocate memory for video device */
1952 vfd = video_device_alloc();
1953 if (NULL == vfd) {
1954 for (j = 0; j < i; j++) {
1955 ch = vpif_obj.dev[j];
1956 video_device_release(ch->video_dev);
1957 }
1958 err = -ENOMEM;
1959 goto vpif_dev_alloc_err;
1960 }
1961
1962 /* Initialize field of video device */
1963 *vfd = vpif_video_template;
1964 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
1965 vfd->release = video_device_release;
1966 snprintf(vfd->name, sizeof(vfd->name),
1967 "DM646x_VPIFCapture_DRIVER_V%d.%d.%d",
1968 (VPIF_CAPTURE_VERSION_CODE >> 16) & 0xff,
1969 (VPIF_CAPTURE_VERSION_CODE >> 8) & 0xff,
1970 (VPIF_CAPTURE_VERSION_CODE) & 0xff);
1971 /* Set video_dev to the video device */
1972 ch->video_dev = vfd;
1973 }
1974
1975 for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1976 ch = vpif_obj.dev[j];
1977 ch->channel_id = j;
1978 common = &(ch->common[VPIF_VIDEO_INDEX]);
1979 spin_lock_init(&common->irqlock);
1980 mutex_init(&common->lock);
1981 /* Initialize prio member of channel object */
1982 v4l2_prio_init(&ch->prio);
1983 err = video_register_device(ch->video_dev,
1984 VFL_TYPE_GRABBER, (j ? 1 : 0));
1985 if (err)
1986 goto probe_out;
1987
1988 video_set_drvdata(ch->video_dev, ch);
1989
1990 }
1991
1992 i2c_adap = i2c_get_adapter(1);
1993 config = pdev->dev.platform_data;
1994
1995 subdev_count = config->subdev_count;
1996 vpif_obj.sd = kmalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1997 GFP_KERNEL);
1998 if (vpif_obj.sd == NULL) {
1999 vpif_err("unable to allocate memory for subdevice pointers\n");
2000 err = -ENOMEM;
2001 goto probe_out;
2002 }
2003
2004 err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
2005 if (err) {
2006 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
2007 goto probe_subdev_out;
2008 }
2009
2010 for (i = 0; i < subdev_count; i++) {
2011 subdevdata = &config->subdev_info[i];
2012 vpif_obj.sd[i] =
2013 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
2014 i2c_adap,
2015 subdevdata->name,
2016 &subdevdata->board_info,
2017 NULL);
2018
2019 if (!vpif_obj.sd[i]) {
2020 vpif_err("Error registering v4l2 subdevice\n");
2021 goto probe_subdev_out;
2022 }
2023 v4l2_info(&vpif_obj.v4l2_dev, "registered sub device %s\n",
2024 subdevdata->name);
2025
2026 if (vpif_obj.sd[i])
2027 vpif_obj.sd[i]->grp_id = 1 << i;
2028 }
2029 v4l2_info(&vpif_obj.v4l2_dev, "DM646x VPIF Capture driver"
2030 " initialized\n");
2031
2032 return 0;
2033
2034probe_subdev_out:
2035 /* free sub devices memory */
2036 kfree(vpif_obj.sd);
2037
2038 j = VPIF_CAPTURE_MAX_DEVICES;
2039probe_out:
2040 v4l2_device_unregister(&vpif_obj.v4l2_dev);
2041 for (k = 0; k < j; k++) {
2042 /* Get the pointer to the channel object */
2043 ch = vpif_obj.dev[k];
2044 /* Unregister video device */
2045 video_unregister_device(ch->video_dev);
2046 }
2047
2048vpif_dev_alloc_err:
2049 k = VPIF_CAPTURE_MAX_DEVICES-1;
2050 res = platform_get_resource(pdev, IORESOURCE_IRQ, k);
2051 i = res->end;
2052
2053vpif_int_err:
2054 for (q = k; q >= 0; q--) {
2055 for (m = i; m >= (int)res->start; m--)
2056 free_irq(m, (void *)(&vpif_obj.dev[q]->channel_id));
2057
2058 res = platform_get_resource(pdev, IORESOURCE_IRQ, q-1);
2059 if (res)
2060 i = res->end;
2061 }
2062 return err;
2063}
2064
2065/**
2066 * vpif_remove() - driver remove handler
2067 * @device: ptr to platform device structure
2068 *
2069 * The vidoe device is unregistered
2070 */
2071static int vpif_remove(struct platform_device *device)
2072{
2073 int i;
2074 struct channel_obj *ch;
2075
2076 v4l2_device_unregister(&vpif_obj.v4l2_dev);
2077
2078 /* un-register device */
2079 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2080 /* Get the pointer to the channel object */
2081 ch = vpif_obj.dev[i];
2082 /* Unregister video device */
2083 video_unregister_device(ch->video_dev);
2084 }
2085 return 0;
2086}
2087
2088/**
2089 * vpif_suspend: vpif device suspend
2090 *
2091 * TODO: Add suspend code here
2092 */
2093static int
2094vpif_suspend(struct device *dev)
2095{
2096 return -1;
2097}
2098
2099/**
2100 * vpif_resume: vpif device suspend
2101 *
2102 * TODO: Add resume code here
2103 */
2104static int
2105vpif_resume(struct device *dev)
2106{
2107 return -1;
2108}
2109
47145210 2110static const struct dev_pm_ops vpif_dev_pm_ops = {
6ffefff5
MK		 2111 .suspend = vpif_suspend,
2112 .resume = vpif_resume,
2113};
2114
2115static struct platform_driver vpif_driver = {
2116 .driver = {
2117 .name = "vpif_capture",
2118 .owner = THIS_MODULE,
2119 .pm = &vpif_dev_pm_ops,
2120 },
2121 .probe = vpif_probe,
2122 .remove = vpif_remove,
2123};
2124
2125/**
2126 * vpif_init: initialize the vpif driver
2127 *
2128 * This function registers device and driver to the kernel, requests irq
2129 * handler and allocates memory
2130 * for channel objects
2131 */
2132static __init int vpif_init(void)
2133{
2134 return platform_driver_register(&vpif_driver);
2135}
2136
2137/**
2138 * vpif_cleanup : This function clean up the vpif capture resources
2139 *
2140 * This will un-registers device and driver to the kernel, frees
2141 * requested irq handler and de-allocates memory allocated for channel
2142 * objects.
2143 */
2144static void vpif_cleanup(void)
2145{
2146 struct platform_device *pdev;
2147 struct resource *res;
2148 int irq_num;
2149 int i = 0;
2150
2151 pdev = container_of(vpif_dev, struct platform_device, dev);
2152 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
2153 for (irq_num = res->start; irq_num <= res->end; irq_num++)
2154 free_irq(irq_num,
2155 (void *)(&vpif_obj.dev[i]->channel_id));
2156 i++;
2157 }
2158
2159 platform_driver_unregister(&vpif_driver);
2160
2161 kfree(vpif_obj.sd);
2162 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++)
2163 kfree(vpif_obj.dev[i]);
2164}
2165
2166/* Function for module initialization and cleanup */
2167module_init(vpif_init);
2168module_exit(vpif_cleanup);
Linux kernel - Deliverables
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