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1/*
2 * Copyright (C) 2008-2009 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 * Driver name : VPFE Capture driver
19 * VPFE Capture driver allows applications to capture and stream video
20 * frames on DaVinci SoCs (DM6446, DM355 etc) from a YUV source such as
21 * TVP5146 or Raw Bayer RGB image data from an image sensor
22 * such as Microns' MT9T001, MT9T031 etc.
23 *
24 * These SoCs have, in common, a Video Processing Subsystem (VPSS) that
25 * consists of a Video Processing Front End (VPFE) for capturing
26 * video/raw image data and Video Processing Back End (VPBE) for displaying
27 * YUV data through an in-built analog encoder or Digital LCD port. This
28 * driver is for capture through VPFE. A typical EVM using these SoCs have
29 * following high level configuration.
30 *
31 *
32 * decoder(TVP5146/ YUV/
33 * MT9T001) --> Raw Bayer RGB ---> MUX -> VPFE (CCDC/ISIF)
34 * data input | |
35 * V |
36 * SDRAM |
37 * V
38 * Image Processor
39 * |
40 * V
41 * SDRAM
42 * The data flow happens from a decoder connected to the VPFE over a
43 * YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
44 * and to the input of VPFE through an optional MUX (if more inputs are
45 * to be interfaced on the EVM). The input data is first passed through
46 * CCDC (CCD Controller, a.k.a Image Sensor Interface, ISIF). The CCDC
47 * does very little or no processing on YUV data and does pre-process Raw
48 * Bayer RGB data through modules such as Defect Pixel Correction (DFC)
49 * Color Space Conversion (CSC), data gain/offset etc. After this, data
50 * can be written to SDRAM or can be connected to the image processing
51 * block such as IPIPE (on DM355 only).
52 *
53 * Features supported
54 * - MMAP IO
55 * - Capture using TVP5146 over BT.656
56 * - support for interfacing decoders using sub device model
57 * - Work with DM355 or DM6446 CCDC to do Raw Bayer RGB/YUV
58 * data capture to SDRAM.
59 * TODO list
60 * - Support multiple REQBUF after open
61 * - Support for de-allocating buffers through REQBUF
62 * - Support for Raw Bayer RGB capture
63 * - Support for chaining Image Processor
64 * - Support for static allocation of buffers
65 * - Support for USERPTR IO
66 * - Support for STREAMON before QBUF
67 * - Support for control ioctls
68 */
69#include <linux/module.h>
70#include <linux/slab.h>
71#include <linux/init.h>
72#include <linux/platform_device.h>
73#include <linux/interrupt.h>
74#include <media/v4l2-common.h>
75#include <linux/io.h>
76#include <media/davinci/vpfe_capture.h>
77#include "ccdc_hw_device.h"
78
79static int debug;
80static u32 numbuffers = 3;
81static u32 bufsize = (720 * 576 * 2);
82
83module_param(numbuffers, uint, S_IRUGO);
84module_param(bufsize, uint, S_IRUGO);
85module_param(debug, int, 0644);
86
87MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
88MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
89MODULE_PARM_DESC(debug, "Debug level 0-1");
90
91MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
92MODULE_LICENSE("GPL");
93MODULE_AUTHOR("Texas Instruments");
94
95/* standard information */
96struct vpfe_standard {
97 v4l2_std_id std_id;
98 unsigned int width;
99 unsigned int height;
100 struct v4l2_fract pixelaspect;
101 /* 0 - progressive, 1 - interlaced */
102 int frame_format;
103};
104
105/* ccdc configuration */
106struct ccdc_config {
107 /* This make sure vpfe is probed and ready to go */
108 int vpfe_probed;
109 /* name of ccdc device */
110 char name[32];
111};
112
113/* data structures */
114static struct vpfe_config_params config_params = {
115 .min_numbuffers = 3,
116 .numbuffers = 3,
117 .min_bufsize = 720 * 480 * 2,
118 .device_bufsize = 720 * 576 * 2,
119};
120
121/* ccdc device registered */
122static struct ccdc_hw_device *ccdc_dev;
123/* lock for accessing ccdc information */
124static DEFINE_MUTEX(ccdc_lock);
125/* ccdc configuration */
126static struct ccdc_config *ccdc_cfg;
127
128const struct vpfe_standard vpfe_standards[] = {
129 {V4L2_STD_525_60, 720, 480, {11, 10}, 1},
130 {V4L2_STD_625_50, 720, 576, {54, 59}, 1},
131};
132
133/* Used when raw Bayer image from ccdc is directly captured to SDRAM */
134static const struct vpfe_pixel_format vpfe_pix_fmts[] = {
135 {
136 .fmtdesc = {
137 .index = 0,
138 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
139 .description = "Bayer GrRBGb 8bit A-Law compr.",
140 .pixelformat = V4L2_PIX_FMT_SBGGR8,
141 },
142 .bpp = 1,
143 },
144 {
145 .fmtdesc = {
146 .index = 1,
147 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
148 .description = "Bayer GrRBGb - 16bit",
149 .pixelformat = V4L2_PIX_FMT_SBGGR16,
150 },
151 .bpp = 2,
152 },
153 {
154 .fmtdesc = {
155 .index = 2,
156 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
157 .description = "Bayer GrRBGb 8bit DPCM compr.",
158 .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
159 },
160 .bpp = 1,
161 },
162 {
163 .fmtdesc = {
164 .index = 3,
165 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
166 .description = "YCbCr 4:2:2 Interleaved UYVY",
167 .pixelformat = V4L2_PIX_FMT_UYVY,
168 },
169 .bpp = 2,
170 },
171 {
172 .fmtdesc = {
173 .index = 4,
174 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
175 .description = "YCbCr 4:2:2 Interleaved YUYV",
176 .pixelformat = V4L2_PIX_FMT_YUYV,
177 },
178 .bpp = 2,
179 },
180 {
181 .fmtdesc = {
182 .index = 5,
183 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
184 .description = "Y/CbCr 4:2:0 - Semi planar",
185 .pixelformat = V4L2_PIX_FMT_NV12,
186 },
187 .bpp = 1,
188 },
189};
190
191/*
192 * vpfe_lookup_pix_format()
193 * lookup an entry in the vpfe pix format table based on pix_format
194 */
195static const struct vpfe_pixel_format *vpfe_lookup_pix_format(u32 pix_format)
196{
197 int i;
198
199 for (i = 0; i < ARRAY_SIZE(vpfe_pix_fmts); i++) {
200 if (pix_format == vpfe_pix_fmts[i].fmtdesc.pixelformat)
201 return &vpfe_pix_fmts[i];
202 }
203 return NULL;
204}
205
206/*
207 * vpfe_register_ccdc_device. CCDC module calls this to
208 * register with vpfe capture
209 */
210int vpfe_register_ccdc_device(struct ccdc_hw_device *dev)
211{
212 int ret = 0;
213 printk(KERN_NOTICE "vpfe_register_ccdc_device: %s\n", dev->name);
214
215 BUG_ON(!dev->hw_ops.open);
216 BUG_ON(!dev->hw_ops.enable);
217 BUG_ON(!dev->hw_ops.set_hw_if_params);
218 BUG_ON(!dev->hw_ops.configure);
219 BUG_ON(!dev->hw_ops.set_buftype);
220 BUG_ON(!dev->hw_ops.get_buftype);
221 BUG_ON(!dev->hw_ops.enum_pix);
222 BUG_ON(!dev->hw_ops.set_frame_format);
223 BUG_ON(!dev->hw_ops.get_frame_format);
224 BUG_ON(!dev->hw_ops.get_pixel_format);
225 BUG_ON(!dev->hw_ops.set_pixel_format);
226 BUG_ON(!dev->hw_ops.set_image_window);
227 BUG_ON(!dev->hw_ops.get_image_window);
228 BUG_ON(!dev->hw_ops.get_line_length);
229 BUG_ON(!dev->hw_ops.getfid);
230
231 mutex_lock(&ccdc_lock);
232 if (NULL == ccdc_cfg) {
233 /*
234 * TODO. Will this ever happen? if so, we need to fix it.
235 * Proabably we need to add the request to a linked list and
236 * walk through it during vpfe probe
237 */
238 printk(KERN_ERR "vpfe capture not initialized\n");
239 ret = -EFAULT;
240 goto unlock;
241 }
242
243 if (strcmp(dev->name, ccdc_cfg->name)) {
244 /* ignore this ccdc */
245 ret = -EINVAL;
246 goto unlock;
247 }
248
249 if (ccdc_dev) {
250 printk(KERN_ERR "ccdc already registered\n");
251 ret = -EINVAL;
252 goto unlock;
253 }
254
255 ccdc_dev = dev;
256unlock:
257 mutex_unlock(&ccdc_lock);
258 return ret;
259}
260EXPORT_SYMBOL(vpfe_register_ccdc_device);
261
262/*
263 * vpfe_unregister_ccdc_device. CCDC module calls this to
264 * unregister with vpfe capture
265 */
266void vpfe_unregister_ccdc_device(struct ccdc_hw_device *dev)
267{
268 if (NULL == dev) {
269 printk(KERN_ERR "invalid ccdc device ptr\n");
270 return;
271 }
272
273 printk(KERN_NOTICE "vpfe_unregister_ccdc_device, dev->name = %s\n",
274 dev->name);
275
276 if (strcmp(dev->name, ccdc_cfg->name)) {
277 /* ignore this ccdc */
278 return;
279 }
280
281 mutex_lock(&ccdc_lock);
282 ccdc_dev = NULL;
283 mutex_unlock(&ccdc_lock);
284 return;
285}
286EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
287
288/*
289 * vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
290 */
291static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe_dev,
292 struct v4l2_format *f)
293{
294 struct v4l2_rect image_win;
295 enum ccdc_buftype buf_type;
296 enum ccdc_frmfmt frm_fmt;
297
298 memset(f, 0, sizeof(*f));
299 f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
300 ccdc_dev->hw_ops.get_image_window(&image_win);
301 f->fmt.pix.width = image_win.width;
302 f->fmt.pix.height = image_win.height;
303 f->fmt.pix.bytesperline = ccdc_dev->hw_ops.get_line_length();
304 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
305 f->fmt.pix.height;
306 buf_type = ccdc_dev->hw_ops.get_buftype();
307 f->fmt.pix.pixelformat = ccdc_dev->hw_ops.get_pixel_format();
308 frm_fmt = ccdc_dev->hw_ops.get_frame_format();
309 if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
310 f->fmt.pix.field = V4L2_FIELD_NONE;
311 else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
312 if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
313 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
314 else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED)
315 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
316 else {
317 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf_type\n");
318 return -EINVAL;
319 }
320 } else {
321 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid frm_fmt\n");
322 return -EINVAL;
323 }
324 return 0;
325}
326
327/*
328 * vpfe_config_ccdc_image_format()
329 * For a pix format, configure ccdc to setup the capture
330 */
331static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe_dev)
332{
333 enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
334 int ret = 0;
335
336 if (ccdc_dev->hw_ops.set_pixel_format(
337 vpfe_dev->fmt.fmt.pix.pixelformat) < 0) {
338 v4l2_err(&vpfe_dev->v4l2_dev,
339 "couldn't set pix format in ccdc\n");
340 return -EINVAL;
341 }
342 /* configure the image window */
343 ccdc_dev->hw_ops.set_image_window(&vpfe_dev->crop);
344
345 switch (vpfe_dev->fmt.fmt.pix.field) {
346 case V4L2_FIELD_INTERLACED:
347 /* do nothing, since it is default */
348 ret = ccdc_dev->hw_ops.set_buftype(
349 CCDC_BUFTYPE_FLD_INTERLEAVED);
350 break;
351 case V4L2_FIELD_NONE:
352 frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
353 /* buffer type only applicable for interlaced scan */
354 break;
355 case V4L2_FIELD_SEQ_TB:
356 ret = ccdc_dev->hw_ops.set_buftype(
357 CCDC_BUFTYPE_FLD_SEPARATED);
358 break;
359 default:
360 return -EINVAL;
361 }
362
363 /* set the frame format */
364 if (!ret)
365 ret = ccdc_dev->hw_ops.set_frame_format(frm_fmt);
366 return ret;
367}
368/*
369 * vpfe_config_image_format()
370 * For a given standard, this functions sets up the default
371 * pix format & crop values in the vpfe device and ccdc. It first
372 * starts with defaults based values from the standard table.
373 * It then checks if sub device support g_mbus_fmt and then override the
374 * values based on that.Sets crop values to match with scan resolution
375 * starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
376 * values in ccdc
377 */
378static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
379 const v4l2_std_id *std_id)
380{
381 struct vpfe_subdev_info *sdinfo = vpfe_dev->current_subdev;
382 struct v4l2_mbus_framefmt mbus_fmt;
383 struct v4l2_pix_format *pix = &vpfe_dev->fmt.fmt.pix;
384 int i, ret = 0;
385
386 for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
387 if (vpfe_standards[i].std_id & *std_id) {
388 vpfe_dev->std_info.active_pixels =
389 vpfe_standards[i].width;
390 vpfe_dev->std_info.active_lines =
391 vpfe_standards[i].height;
392 vpfe_dev->std_info.frame_format =
393 vpfe_standards[i].frame_format;
394 vpfe_dev->std_index = i;
395 break;
396 }
397 }
398
399 if (i == ARRAY_SIZE(vpfe_standards)) {
400 v4l2_err(&vpfe_dev->v4l2_dev, "standard not supported\n");
401 return -EINVAL;
402 }
403
404 vpfe_dev->crop.top = 0;
405 vpfe_dev->crop.left = 0;
406 vpfe_dev->crop.width = vpfe_dev->std_info.active_pixels;
407 vpfe_dev->crop.height = vpfe_dev->std_info.active_lines;
408 pix->width = vpfe_dev->crop.width;
409 pix->height = vpfe_dev->crop.height;
410
411 /* first field and frame format based on standard frame format */
412 if (vpfe_dev->std_info.frame_format) {
413 pix->field = V4L2_FIELD_INTERLACED;
414 /* assume V4L2_PIX_FMT_UYVY as default */
415 pix->pixelformat = V4L2_PIX_FMT_UYVY;
416 v4l2_fill_mbus_format(&mbus_fmt, pix,
417 V4L2_MBUS_FMT_YUYV10_2X10);
418 } else {
419 pix->field = V4L2_FIELD_NONE;
420 /* assume V4L2_PIX_FMT_SBGGR8 */
421 pix->pixelformat = V4L2_PIX_FMT_SBGGR8;
422 v4l2_fill_mbus_format(&mbus_fmt, pix,
423 V4L2_MBUS_FMT_SBGGR8_1X8);
424 }
425
426 /* if sub device supports g_mbus_fmt, override the defaults */
427 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
428 sdinfo->grp_id, video, g_mbus_fmt, &mbus_fmt);
429
430 if (ret && ret != -ENOIOCTLCMD) {
431 v4l2_err(&vpfe_dev->v4l2_dev,
432 "error in getting g_mbus_fmt from sub device\n");
433 return ret;
434 }
435 v4l2_fill_pix_format(pix, &mbus_fmt);
436 pix->bytesperline = pix->width * 2;
437 pix->sizeimage = pix->bytesperline * pix->height;
438
439 /* Sets the values in CCDC */
440 ret = vpfe_config_ccdc_image_format(vpfe_dev);
441 if (ret)
442 return ret;
443
444 /* Update the values of sizeimage and bytesperline */
445 if (!ret) {
446 pix->bytesperline = ccdc_dev->hw_ops.get_line_length();
447 pix->sizeimage = pix->bytesperline * pix->height;
448 }
449 return ret;
450}
451
452static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
453{
454 int ret = 0;
455
456 /* set first input of current subdevice as the current input */
457 vpfe_dev->current_input = 0;
458
459 /* set default standard */
460 vpfe_dev->std_index = 0;
461
462 /* Configure the default format information */
463 ret = vpfe_config_image_format(vpfe_dev,
464 &vpfe_standards[vpfe_dev->std_index].std_id);
465 if (ret)
466 return ret;
467
468 /* now open the ccdc device to initialize it */
469 mutex_lock(&ccdc_lock);
470 if (NULL == ccdc_dev) {
471 v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
472 ret = -ENODEV;
473 goto unlock;
474 }
475
476 if (!try_module_get(ccdc_dev->owner)) {
477 v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
478 ret = -ENODEV;
479 goto unlock;
480 }
481 ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
482 if (!ret)
483 vpfe_dev->initialized = 1;
484
485 /* Clear all VPFE/CCDC interrupts */
486 if (vpfe_dev->cfg->clr_intr)
487 vpfe_dev->cfg->clr_intr(-1);
488
489unlock:
490 mutex_unlock(&ccdc_lock);
491 return ret;
492}
493
494/*
495 * vpfe_open : It creates object of file handle structure and
496 * stores it in private_data member of filepointer
497 */
498static int vpfe_open(struct file *file)
499{
500 struct vpfe_device *vpfe_dev = video_drvdata(file);
501 struct vpfe_fh *fh;
502
503 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
504
505 if (!vpfe_dev->cfg->num_subdevs) {
506 v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
507 return -ENODEV;
508 }
509
510 /* Allocate memory for the file handle object */
511 fh = kmalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
512 if (NULL == fh) {
513 v4l2_err(&vpfe_dev->v4l2_dev,
514 "unable to allocate memory for file handle object\n");
515 return -ENOMEM;
516 }
517 /* store pointer to fh in private_data member of file */
518 file->private_data = fh;
519 fh->vpfe_dev = vpfe_dev;
520 mutex_lock(&vpfe_dev->lock);
521 /* If decoder is not initialized. initialize it */
522 if (!vpfe_dev->initialized) {
523 if (vpfe_initialize_device(vpfe_dev)) {
524 mutex_unlock(&vpfe_dev->lock);
525 return -ENODEV;
526 }
527 }
528 /* Increment device usrs counter */
529 vpfe_dev->usrs++;
530 /* Set io_allowed member to false */
531 fh->io_allowed = 0;
532 /* Initialize priority of this instance to default priority */
533 fh->prio = V4L2_PRIORITY_UNSET;
534 v4l2_prio_open(&vpfe_dev->prio, &fh->prio);
535 mutex_unlock(&vpfe_dev->lock);
536 return 0;
537}
538
539static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
540{
541 unsigned long addr;
542
543 vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
544 struct videobuf_buffer, queue);
545 list_del(&vpfe_dev->next_frm->queue);
546 vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
547 addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
548
549 ccdc_dev->hw_ops.setfbaddr(addr);
550}
551
552static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev)
553{
554 unsigned long addr;
555
556 addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
557 addr += vpfe_dev->field_off;
558 ccdc_dev->hw_ops.setfbaddr(addr);
559}
560
561static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
562{
563 struct timeval timevalue;
564
565 do_gettimeofday(&timevalue);
566 vpfe_dev->cur_frm->ts = timevalue;
567 vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
568 vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
569 wake_up_interruptible(&vpfe_dev->cur_frm->done);
570 vpfe_dev->cur_frm = vpfe_dev->next_frm;
571}
572
573/* ISR for VINT0*/
574static irqreturn_t vpfe_isr(int irq, void *dev_id)
575{
576 struct vpfe_device *vpfe_dev = dev_id;
577 enum v4l2_field field;
578 int fid;
579
580 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
581 field = vpfe_dev->fmt.fmt.pix.field;
582
583 /* if streaming not started, don't do anything */
584 if (!vpfe_dev->started)
585 goto clear_intr;
586
587 /* only for 6446 this will be applicable */
588 if (NULL != ccdc_dev->hw_ops.reset)
589 ccdc_dev->hw_ops.reset();
590
591 if (field == V4L2_FIELD_NONE) {
592 /* handle progressive frame capture */
593 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
594 "frame format is progressive...\n");
595 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
596 vpfe_process_buffer_complete(vpfe_dev);
597 goto clear_intr;
598 }
599
600 /* interlaced or TB capture check which field we are in hardware */
601 fid = ccdc_dev->hw_ops.getfid();
602
603 /* switch the software maintained field id */
604 vpfe_dev->field_id ^= 1;
605 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
606 fid, vpfe_dev->field_id);
607 if (fid == vpfe_dev->field_id) {
608 /* we are in-sync here,continue */
609 if (fid == 0) {
610 /*
611 * One frame is just being captured. If the next frame
612 * is available, release the current frame and move on
613 */
614 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
615 vpfe_process_buffer_complete(vpfe_dev);
616 /*
617 * based on whether the two fields are stored
618 * interleavely or separately in memory, reconfigure
619 * the CCDC memory address
620 */
621 if (field == V4L2_FIELD_SEQ_TB) {
622 vpfe_schedule_bottom_field(vpfe_dev);
623 }
624 goto clear_intr;
625 }
626 /*
627 * if one field is just being captured configure
628 * the next frame get the next frame from the empty
629 * queue if no frame is available hold on to the
630 * current buffer
631 */
632 spin_lock(&vpfe_dev->dma_queue_lock);
633 if (!list_empty(&vpfe_dev->dma_queue) &&
634 vpfe_dev->cur_frm == vpfe_dev->next_frm)
635 vpfe_schedule_next_buffer(vpfe_dev);
636 spin_unlock(&vpfe_dev->dma_queue_lock);
637 } else if (fid == 0) {
638 /*
639 * out of sync. Recover from any hardware out-of-sync.
640 * May loose one frame
641 */
642 vpfe_dev->field_id = fid;
643 }
644clear_intr:
645 if (vpfe_dev->cfg->clr_intr)
646 vpfe_dev->cfg->clr_intr(irq);
647
648 return IRQ_HANDLED;
649}
650
651/* vdint1_isr - isr handler for VINT1 interrupt */
652static irqreturn_t vdint1_isr(int irq, void *dev_id)
653{
654 struct vpfe_device *vpfe_dev = dev_id;
655
656 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
657
658 /* if streaming not started, don't do anything */
659 if (!vpfe_dev->started) {
660 if (vpfe_dev->cfg->clr_intr)
661 vpfe_dev->cfg->clr_intr(irq);
662 return IRQ_HANDLED;
663 }
664
665 spin_lock(&vpfe_dev->dma_queue_lock);
666 if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
667 !list_empty(&vpfe_dev->dma_queue) &&
668 vpfe_dev->cur_frm == vpfe_dev->next_frm)
669 vpfe_schedule_next_buffer(vpfe_dev);
670 spin_unlock(&vpfe_dev->dma_queue_lock);
671
672 if (vpfe_dev->cfg->clr_intr)
673 vpfe_dev->cfg->clr_intr(irq);
674
675 return IRQ_HANDLED;
676}
677
678static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
679{
680 enum ccdc_frmfmt frame_format;
681
682 frame_format = ccdc_dev->hw_ops.get_frame_format();
683 if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
684 free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
685}
686
687static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
688{
689 enum ccdc_frmfmt frame_format;
690
691 frame_format = ccdc_dev->hw_ops.get_frame_format();
692 if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
693 return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
694 IRQF_DISABLED, "vpfe_capture1",
695 vpfe_dev);
696 }
697 return 0;
698}
699
700/* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
701static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
702{
703 vpfe_dev->started = 0;
704 ccdc_dev->hw_ops.enable(0);
705 if (ccdc_dev->hw_ops.enable_out_to_sdram)
706 ccdc_dev->hw_ops.enable_out_to_sdram(0);
707}
708
709/*
710 * vpfe_release : This function deletes buffer queue, frees the
711 * buffers and the vpfe file handle
712 */
713static int vpfe_release(struct file *file)
714{
715 struct vpfe_device *vpfe_dev = video_drvdata(file);
716 struct vpfe_fh *fh = file->private_data;
717 struct vpfe_subdev_info *sdinfo;
718 int ret;
719
720 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
721
722 /* Get the device lock */
723 mutex_lock(&vpfe_dev->lock);
724 /* if this instance is doing IO */
725 if (fh->io_allowed) {
726 if (vpfe_dev->started) {
727 sdinfo = vpfe_dev->current_subdev;
728 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
729 sdinfo->grp_id,
730 video, s_stream, 0);
731 if (ret && (ret != -ENOIOCTLCMD))
732 v4l2_err(&vpfe_dev->v4l2_dev,
733 "stream off failed in subdev\n");
734 vpfe_stop_ccdc_capture(vpfe_dev);
735 vpfe_detach_irq(vpfe_dev);
736 videobuf_streamoff(&vpfe_dev->buffer_queue);
737 }
738 vpfe_dev->io_usrs = 0;
739 vpfe_dev->numbuffers = config_params.numbuffers;
740 }
741
742 /* Decrement device usrs counter */
743 vpfe_dev->usrs--;
744 /* Close the priority */
745 v4l2_prio_close(&vpfe_dev->prio, fh->prio);
746 /* If this is the last file handle */
747 if (!vpfe_dev->usrs) {
748 vpfe_dev->initialized = 0;
749 if (ccdc_dev->hw_ops.close)
750 ccdc_dev->hw_ops.close(vpfe_dev->pdev);
751 module_put(ccdc_dev->owner);
752 }
753 mutex_unlock(&vpfe_dev->lock);
754 file->private_data = NULL;
755 /* Free memory allocated to file handle object */
756 kfree(fh);
757 return 0;
758}
759
760/*
761 * vpfe_mmap : It is used to map kernel space buffers
762 * into user spaces
763 */
764static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
765{
766 /* Get the device object and file handle object */
767 struct vpfe_device *vpfe_dev = video_drvdata(file);
768
769 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
770
771 return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
772}
773
774/*
775 * vpfe_poll: It is used for select/poll system call
776 */
777static unsigned int vpfe_poll(struct file *file, poll_table *wait)
778{
779 struct vpfe_device *vpfe_dev = video_drvdata(file);
780
781 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
782
783 if (vpfe_dev->started)
784 return videobuf_poll_stream(file,
785 &vpfe_dev->buffer_queue, wait);
786 return 0;
787}
788
789/* vpfe capture driver file operations */
790static const struct v4l2_file_operations vpfe_fops = {
791 .owner = THIS_MODULE,
792 .open = vpfe_open,
793 .release = vpfe_release,
794 .unlocked_ioctl = video_ioctl2,
795 .mmap = vpfe_mmap,
796 .poll = vpfe_poll
797};
798
799/*
800 * vpfe_check_format()
801 * This function adjust the input pixel format as per hardware
802 * capabilities and update the same in pixfmt.
803 * Following algorithm used :-
804 *
805 * If given pixformat is not in the vpfe list of pix formats or not
806 * supported by the hardware, current value of pixformat in the device
807 * is used
808 * If given field is not supported, then current field is used. If field
809 * is different from current, then it is matched with that from sub device.
810 * Minimum height is 2 lines for interlaced or tb field and 1 line for
811 * progressive. Maximum height is clamped to active active lines of scan
812 * Minimum width is 32 bytes in memory and width is clamped to active
813 * pixels of scan.
814 * bytesperline is a multiple of 32.
815 */
816static const struct vpfe_pixel_format *
817 vpfe_check_format(struct vpfe_device *vpfe_dev,
818 struct v4l2_pix_format *pixfmt)
819{
820 u32 min_height = 1, min_width = 32, max_width, max_height;
821 const struct vpfe_pixel_format *vpfe_pix_fmt;
822 u32 pix;
823 int temp, found;
824
825 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
826 if (NULL == vpfe_pix_fmt) {
827 /*
828 * use current pixel format in the vpfe device. We
829 * will find this pix format in the table
830 */
831 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
832 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
833 }
834
835 /* check if hw supports it */
836 temp = 0;
837 found = 0;
838 while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
839 if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
840 found = 1;
841 break;
842 }
843 temp++;
844 }
845
846 if (!found) {
847 /* use current pixel format */
848 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
849 /*
850 * Since this is currently used in the vpfe device, we
851 * will find this pix format in the table
852 */
853 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
854 }
855
856 /* check what field format is supported */
857 if (pixfmt->field == V4L2_FIELD_ANY) {
858 /* if field is any, use current value as default */
859 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
860 }
861
862 /*
863 * if field is not same as current field in the vpfe device
864 * try matching the field with the sub device field
865 */
866 if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
867 /*
868 * If field value is not in the supported fields, use current
869 * field used in the device as default
870 */
871 switch (pixfmt->field) {
872 case V4L2_FIELD_INTERLACED:
873 case V4L2_FIELD_SEQ_TB:
874 /* if sub device is supporting progressive, use that */
875 if (!vpfe_dev->std_info.frame_format)
876 pixfmt->field = V4L2_FIELD_NONE;
877 break;
878 case V4L2_FIELD_NONE:
879 if (vpfe_dev->std_info.frame_format)
880 pixfmt->field = V4L2_FIELD_INTERLACED;
881 break;
882
883 default:
884 /* use current field as default */
885 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
886 break;
887 }
888 }
889
890 /* Now adjust image resolutions supported */
891 if (pixfmt->field == V4L2_FIELD_INTERLACED ||
892 pixfmt->field == V4L2_FIELD_SEQ_TB)
893 min_height = 2;
894
895 max_width = vpfe_dev->std_info.active_pixels;
896 max_height = vpfe_dev->std_info.active_lines;
897 min_width /= vpfe_pix_fmt->bpp;
898
899 v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
900 pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
901
902 pixfmt->width = clamp((pixfmt->width), min_width, max_width);
903 pixfmt->height = clamp((pixfmt->height), min_height, max_height);
904
905 /* If interlaced, adjust height to be a multiple of 2 */
906 if (pixfmt->field == V4L2_FIELD_INTERLACED)
907 pixfmt->height &= (~1);
908 /*
909 * recalculate bytesperline and sizeimage since width
910 * and height might have changed
911 */
912 pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
913 & ~31);
914 if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
915 pixfmt->sizeimage =
916 pixfmt->bytesperline * pixfmt->height +
917 ((pixfmt->bytesperline * pixfmt->height) >> 1);
918 else
919 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
920
921 v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height ="
922 " %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
923 pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
924 pixfmt->bytesperline, pixfmt->sizeimage);
925 return vpfe_pix_fmt;
926}
927
928static int vpfe_querycap(struct file *file, void *priv,
929 struct v4l2_capability *cap)
930{
931 struct vpfe_device *vpfe_dev = video_drvdata(file);
932
933 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
934
935 cap->version = VPFE_CAPTURE_VERSION_CODE;
936 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
937 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
938 strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
939 strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
940 return 0;
941}
942
943static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
944 struct v4l2_format *fmt)
945{
946 struct vpfe_device *vpfe_dev = video_drvdata(file);
947 int ret = 0;
948
949 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
950 /* Fill in the information about format */
951 *fmt = vpfe_dev->fmt;
952 return ret;
953}
954
955static int vpfe_enum_fmt_vid_cap(struct file *file, void *priv,
956 struct v4l2_fmtdesc *fmt)
957{
958 struct vpfe_device *vpfe_dev = video_drvdata(file);
959 const struct vpfe_pixel_format *pix_fmt;
960 int temp_index;
961 u32 pix;
962
963 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
964
965 if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
966 return -EINVAL;
967
968 /* Fill in the information about format */
969 pix_fmt = vpfe_lookup_pix_format(pix);
970 if (NULL != pix_fmt) {
971 temp_index = fmt->index;
972 *fmt = pix_fmt->fmtdesc;
973 fmt->index = temp_index;
974 return 0;
975 }
976 return -EINVAL;
977}
978
979static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
980 struct v4l2_format *fmt)
981{
982 struct vpfe_device *vpfe_dev = video_drvdata(file);
983 const struct vpfe_pixel_format *pix_fmts;
984 int ret = 0;
985
986 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
987
988 /* If streaming is started, return error */
989 if (vpfe_dev->started) {
990 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
991 return -EBUSY;
992 }
993
994 /* Check for valid frame format */
995 pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
996
997 if (NULL == pix_fmts)
998 return -EINVAL;
999
1000 /* store the pixel format in the device object */
1001 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1002 if (ret)
1003 return ret;
1004
1005 /* First detach any IRQ if currently attached */
1006 vpfe_detach_irq(vpfe_dev);
1007 vpfe_dev->fmt = *fmt;
1008 /* set image capture parameters in the ccdc */
1009 ret = vpfe_config_ccdc_image_format(vpfe_dev);
1010 mutex_unlock(&vpfe_dev->lock);
1011 return ret;
1012}
1013
1014static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
1015 struct v4l2_format *f)
1016{
1017 struct vpfe_device *vpfe_dev = video_drvdata(file);
1018 const struct vpfe_pixel_format *pix_fmts;
1019
1020 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
1021
1022 pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
1023 if (NULL == pix_fmts)
1024 return -EINVAL;
1025 return 0;
1026}
1027
1028/*
1029 * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1030 * given app input index
1031 */
1032static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
1033 int *subdev_index,
1034 int *subdev_input_index,
1035 int app_input_index)
1036{
1037 struct vpfe_config *cfg = vpfe_dev->cfg;
1038 struct vpfe_subdev_info *sdinfo;
1039 int i, j = 0;
1040
1041 for (i = 0; i < cfg->num_subdevs; i++) {
1042 sdinfo = &cfg->sub_devs[i];
1043 if (app_input_index < (j + sdinfo->num_inputs)) {
1044 *subdev_index = i;
1045 *subdev_input_index = app_input_index - j;
1046 return 0;
1047 }
1048 j += sdinfo->num_inputs;
1049 }
1050 return -EINVAL;
1051}
1052
1053/*
1054 * vpfe_get_app_input - Get app input index for a given subdev input index
1055 * driver stores the input index of the current sub device and translate it
1056 * when application request the current input
1057 */
1058static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
1059 int *app_input_index)
1060{
1061 struct vpfe_config *cfg = vpfe_dev->cfg;
1062 struct vpfe_subdev_info *sdinfo;
1063 int i, j = 0;
1064
1065 for (i = 0; i < cfg->num_subdevs; i++) {
1066 sdinfo = &cfg->sub_devs[i];
1067 if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
1068 if (vpfe_dev->current_input >= sdinfo->num_inputs)
1069 return -1;
1070 *app_input_index = j + vpfe_dev->current_input;
1071 return 0;
1072 }
1073 j += sdinfo->num_inputs;
1074 }
1075 return -EINVAL;
1076}
1077
1078static int vpfe_enum_input(struct file *file, void *priv,
1079 struct v4l2_input *inp)
1080{
1081 struct vpfe_device *vpfe_dev = video_drvdata(file);
1082 struct vpfe_subdev_info *sdinfo;
1083 int subdev, index ;
1084
1085 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
1086
1087 if (vpfe_get_subdev_input_index(vpfe_dev,
1088 &subdev,
1089 &index,
1090 inp->index) < 0) {
1091 v4l2_err(&vpfe_dev->v4l2_dev, "input information not found"
1092 " for the subdev\n");
1093 return -EINVAL;
1094 }
1095 sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1096 memcpy(inp, &sdinfo->inputs[index], sizeof(struct v4l2_input));
1097 return 0;
1098}
1099
1100static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1101{
1102 struct vpfe_device *vpfe_dev = video_drvdata(file);
1103
1104 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1105
1106 return vpfe_get_app_input_index(vpfe_dev, index);
1107}
1108
1109
1110static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1111{
1112 struct vpfe_device *vpfe_dev = video_drvdata(file);
1113 struct vpfe_subdev_info *sdinfo;
1114 int subdev_index, inp_index;
1115 struct vpfe_route *route;
1116 u32 input = 0, output = 0;
1117 int ret = -EINVAL;
1118
1119 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
1120
1121 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1122 if (ret)
1123 return ret;
1124
1125 /*
1126 * If streaming is started return device busy
1127 * error
1128 */
1129 if (vpfe_dev->started) {
1130 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
1131 ret = -EBUSY;
1132 goto unlock_out;
1133 }
1134
1135 if (vpfe_get_subdev_input_index(vpfe_dev,
1136 &subdev_index,
1137 &inp_index,
1138 index) < 0) {
1139 v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
1140 goto unlock_out;
1141 }
1142
1143 sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
1144 route = &sdinfo->routes[inp_index];
1145 if (route && sdinfo->can_route) {
1146 input = route->input;
1147 output = route->output;
1148 }
1149
1150 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1151 video, s_routing, input, output, 0);
1152
1153 if (ret) {
1154 v4l2_err(&vpfe_dev->v4l2_dev,
1155 "vpfe_doioctl:error in setting input in decoder\n");
1156 ret = -EINVAL;
1157 goto unlock_out;
1158 }
1159 vpfe_dev->current_subdev = sdinfo;
1160 vpfe_dev->current_input = index;
1161 vpfe_dev->std_index = 0;
1162
1163 /* set the bus/interface parameter for the sub device in ccdc */
1164 ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1165 if (ret)
1166 goto unlock_out;
1167
1168 /* set the default image parameters in the device */
1169 ret = vpfe_config_image_format(vpfe_dev,
1170 &vpfe_standards[vpfe_dev->std_index].std_id);
1171unlock_out:
1172 mutex_unlock(&vpfe_dev->lock);
1173 return ret;
1174}
1175
1176static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1177{
1178 struct vpfe_device *vpfe_dev = video_drvdata(file);
1179 struct vpfe_subdev_info *sdinfo;
1180 int ret = 0;
1181
1182 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1183
1184 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1185 sdinfo = vpfe_dev->current_subdev;
1186 if (ret)
1187 return ret;
1188 /* Call querystd function of decoder device */
1189 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1190 video, querystd, std_id);
1191 mutex_unlock(&vpfe_dev->lock);
1192 return ret;
1193}
1194
1195static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1196{
1197 struct vpfe_device *vpfe_dev = video_drvdata(file);
1198 struct vpfe_subdev_info *sdinfo;
1199 int ret = 0;
1200
1201 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1202
1203 /* Call decoder driver function to set the standard */
1204 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1205 if (ret)
1206 return ret;
1207
1208 sdinfo = vpfe_dev->current_subdev;
1209 /* If streaming is started, return device busy error */
1210 if (vpfe_dev->started) {
1211 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1212 ret = -EBUSY;
1213 goto unlock_out;
1214 }
1215
1216 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1217 core, s_std, *std_id);
1218 if (ret < 0) {
1219 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1220 goto unlock_out;
1221 }
1222 ret = vpfe_config_image_format(vpfe_dev, std_id);
1223
1224unlock_out:
1225 mutex_unlock(&vpfe_dev->lock);
1226 return ret;
1227}
1228
1229static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1230{
1231 struct vpfe_device *vpfe_dev = video_drvdata(file);
1232
1233 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1234
1235 *std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1236 return 0;
1237}
1238/*
1239 * Videobuf operations
1240 */
1241static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1242 unsigned int *count,
1243 unsigned int *size)
1244{
1245 struct vpfe_fh *fh = vq->priv_data;
1246 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1247
1248 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1249 *size = vpfe_dev->fmt.fmt.pix.sizeimage;
1250 if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
1251 vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
1252 *size = config_params.device_bufsize;
1253
1254 if (*count < config_params.min_numbuffers)
1255 *count = config_params.min_numbuffers;
1256 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1257 "count=%d, size=%d\n", *count, *size);
1258 return 0;
1259}
1260
1261static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1262 struct videobuf_buffer *vb,
1263 enum v4l2_field field)
1264{
1265 struct vpfe_fh *fh = vq->priv_data;
1266 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1267 unsigned long addr;
1268 int ret;
1269
1270 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1271
1272 /* If buffer is not initialized, initialize it */
1273 if (VIDEOBUF_NEEDS_INIT == vb->state) {
1274 vb->width = vpfe_dev->fmt.fmt.pix.width;
1275 vb->height = vpfe_dev->fmt.fmt.pix.height;
1276 vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1277 vb->field = field;
1278
1279 ret = videobuf_iolock(vq, vb, NULL);
1280 if (ret < 0)
1281 return ret;
1282
1283 addr = videobuf_to_dma_contig(vb);
1284 /* Make sure user addresses are aligned to 32 bytes */
1285 if (!ALIGN(addr, 32))
1286 return -EINVAL;
1287
1288 vb->state = VIDEOBUF_PREPARED;
1289 }
1290 return 0;
1291}
1292
1293static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1294 struct videobuf_buffer *vb)
1295{
1296 /* Get the file handle object and device object */
1297 struct vpfe_fh *fh = vq->priv_data;
1298 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1299 unsigned long flags;
1300
1301 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1302
1303 /* add the buffer to the DMA queue */
1304 spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1305 list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1306 spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1307
1308 /* Change state of the buffer */
1309 vb->state = VIDEOBUF_QUEUED;
1310}
1311
1312static void vpfe_videobuf_release(struct videobuf_queue *vq,
1313 struct videobuf_buffer *vb)
1314{
1315 struct vpfe_fh *fh = vq->priv_data;
1316 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1317 unsigned long flags;
1318
1319 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1320
1321 /*
1322 * We need to flush the buffer from the dma queue since
1323 * they are de-allocated
1324 */
1325 spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1326 INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1327 spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1328 videobuf_dma_contig_free(vq, vb);
1329 vb->state = VIDEOBUF_NEEDS_INIT;
1330}
1331
1332static struct videobuf_queue_ops vpfe_videobuf_qops = {
1333 .buf_setup = vpfe_videobuf_setup,
1334 .buf_prepare = vpfe_videobuf_prepare,
1335 .buf_queue = vpfe_videobuf_queue,
1336 .buf_release = vpfe_videobuf_release,
1337};
1338
1339/*
1340 * vpfe_reqbufs. currently support REQBUF only once opening
1341 * the device.
1342 */
1343static int vpfe_reqbufs(struct file *file, void *priv,
1344 struct v4l2_requestbuffers *req_buf)
1345{
1346 struct vpfe_device *vpfe_dev = video_drvdata(file);
1347 struct vpfe_fh *fh = file->private_data;
1348 int ret = 0;
1349
1350 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1351
1352 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1353 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1354 return -EINVAL;
1355 }
1356
1357 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1358 if (ret)
1359 return ret;
1360
1361 if (vpfe_dev->io_usrs != 0) {
1362 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1363 ret = -EBUSY;
1364 goto unlock_out;
1365 }
1366
1367 vpfe_dev->memory = req_buf->memory;
1368 videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1369 &vpfe_videobuf_qops,
1370 vpfe_dev->pdev,
1371 &vpfe_dev->irqlock,
1372 req_buf->type,
1373 vpfe_dev->fmt.fmt.pix.field,
1374 sizeof(struct videobuf_buffer),
1375 fh, NULL);
1376
1377 fh->io_allowed = 1;
1378 vpfe_dev->io_usrs = 1;
1379 INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1380 ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1381unlock_out:
1382 mutex_unlock(&vpfe_dev->lock);
1383 return ret;
1384}
1385
1386static int vpfe_querybuf(struct file *file, void *priv,
1387 struct v4l2_buffer *buf)
1388{
1389 struct vpfe_device *vpfe_dev = video_drvdata(file);
1390
1391 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1392
1393 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1394 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1395 return -EINVAL;
1396 }
1397
1398 if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1399 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1400 return -EINVAL;
1401 }
1402 /* Call videobuf_querybuf to get information */
1403 return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1404}
1405
1406static int vpfe_qbuf(struct file *file, void *priv,
1407 struct v4l2_buffer *p)
1408{
1409 struct vpfe_device *vpfe_dev = video_drvdata(file);
1410 struct vpfe_fh *fh = file->private_data;
1411
1412 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1413
1414 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1415 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1416 return -EINVAL;
1417 }
1418
1419 /*
1420 * If this file handle is not allowed to do IO,
1421 * return error
1422 */
1423 if (!fh->io_allowed) {
1424 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1425 return -EACCES;
1426 }
1427 return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1428}
1429
1430static int vpfe_dqbuf(struct file *file, void *priv,
1431 struct v4l2_buffer *buf)
1432{
1433 struct vpfe_device *vpfe_dev = video_drvdata(file);
1434
1435 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1436
1437 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1438 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1439 return -EINVAL;
1440 }
1441 return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1442 buf, file->f_flags & O_NONBLOCK);
1443}
1444
1445static int vpfe_queryctrl(struct file *file, void *priv,
1446 struct v4l2_queryctrl *qctrl)
1447{
1448 struct vpfe_device *vpfe_dev = video_drvdata(file);
1449 struct vpfe_subdev_info *sdinfo;
1450
1451 sdinfo = vpfe_dev->current_subdev;
1452
1453 return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1454 core, queryctrl, qctrl);
1455
1456}
1457
1458static int vpfe_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl)
1459{
1460 struct vpfe_device *vpfe_dev = video_drvdata(file);
1461 struct vpfe_subdev_info *sdinfo;
1462
1463 sdinfo = vpfe_dev->current_subdev;
1464
1465 return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1466 core, g_ctrl, ctrl);
1467}
1468
1469static int vpfe_s_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl)
1470{
1471 struct vpfe_device *vpfe_dev = video_drvdata(file);
1472 struct vpfe_subdev_info *sdinfo;
1473
1474 sdinfo = vpfe_dev->current_subdev;
1475
1476 return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1477 core, s_ctrl, ctrl);
1478}
1479
1480/*
1481 * vpfe_calculate_offsets : This function calculates buffers offset
1482 * for top and bottom field
1483 */
1484static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1485{
1486 struct v4l2_rect image_win;
1487
1488 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1489
1490 ccdc_dev->hw_ops.get_image_window(&image_win);
1491 vpfe_dev->field_off = image_win.height * image_win.width;
1492}
1493
1494/* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1495static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1496{
1497 ccdc_dev->hw_ops.enable(1);
1498 if (ccdc_dev->hw_ops.enable_out_to_sdram)
1499 ccdc_dev->hw_ops.enable_out_to_sdram(1);
1500 vpfe_dev->started = 1;
1501}
1502
1503/*
1504 * vpfe_streamon. Assume the DMA queue is not empty.
1505 * application is expected to call QBUF before calling
1506 * this ioctl. If not, driver returns error
1507 */
1508static int vpfe_streamon(struct file *file, void *priv,
1509 enum v4l2_buf_type buf_type)
1510{
1511 struct vpfe_device *vpfe_dev = video_drvdata(file);
1512 struct vpfe_fh *fh = file->private_data;
1513 struct vpfe_subdev_info *sdinfo;
1514 unsigned long addr;
1515 int ret = 0;
1516
1517 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1518
1519 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1520 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1521 return -EINVAL;
1522 }
1523
1524 /* If file handle is not allowed IO, return error */
1525 if (!fh->io_allowed) {
1526 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1527 return -EACCES;
1528 }
1529
1530 sdinfo = vpfe_dev->current_subdev;
1531 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1532 video, s_stream, 1);
1533
1534 if (ret && (ret != -ENOIOCTLCMD)) {
1535 v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1536 return -EINVAL;
1537 }
1538
1539 /* If buffer queue is empty, return error */
1540 if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1541 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1542 return -EIO;
1543 }
1544
1545 /* Call videobuf_streamon to start streaming * in videobuf */
1546 ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1547 if (ret)
1548 return ret;
1549
1550
1551 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1552 if (ret)
1553 goto streamoff;
1554 /* Get the next frame from the buffer queue */
1555 vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1556 struct videobuf_buffer, queue);
1557 vpfe_dev->cur_frm = vpfe_dev->next_frm;
1558 /* Remove buffer from the buffer queue */
1559 list_del(&vpfe_dev->cur_frm->queue);
1560 /* Mark state of the current frame to active */
1561 vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1562 /* Initialize field_id and started member */
1563 vpfe_dev->field_id = 0;
1564 addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1565
1566 /* Calculate field offset */
1567 vpfe_calculate_offsets(vpfe_dev);
1568
1569 if (vpfe_attach_irq(vpfe_dev) < 0) {
1570 v4l2_err(&vpfe_dev->v4l2_dev,
1571 "Error in attaching interrupt handle\n");
1572 ret = -EFAULT;
1573 goto unlock_out;
1574 }
1575 if (ccdc_dev->hw_ops.configure() < 0) {
1576 v4l2_err(&vpfe_dev->v4l2_dev,
1577 "Error in configuring ccdc\n");
1578 ret = -EINVAL;
1579 goto unlock_out;
1580 }
1581 ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1582 vpfe_start_ccdc_capture(vpfe_dev);
1583 mutex_unlock(&vpfe_dev->lock);
1584 return ret;
1585unlock_out:
1586 mutex_unlock(&vpfe_dev->lock);
1587streamoff:
1588 ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1589 return ret;
1590}
1591
1592static int vpfe_streamoff(struct file *file, void *priv,
1593 enum v4l2_buf_type buf_type)
1594{
1595 struct vpfe_device *vpfe_dev = video_drvdata(file);
1596 struct vpfe_fh *fh = file->private_data;
1597 struct vpfe_subdev_info *sdinfo;
1598 int ret = 0;
1599
1600 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1601
1602 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1603 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1604 return -EINVAL;
1605 }
1606
1607 /* If io is allowed for this file handle, return error */
1608 if (!fh->io_allowed) {
1609 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1610 return -EACCES;
1611 }
1612
1613 /* If streaming is not started, return error */
1614 if (!vpfe_dev->started) {
1615 v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1616 return -EINVAL;
1617 }
1618
1619 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1620 if (ret)
1621 return ret;
1622
1623 vpfe_stop_ccdc_capture(vpfe_dev);
1624 vpfe_detach_irq(vpfe_dev);
1625
1626 sdinfo = vpfe_dev->current_subdev;
1627 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1628 video, s_stream, 0);
1629
1630 if (ret && (ret != -ENOIOCTLCMD))
1631 v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1632 ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1633 mutex_unlock(&vpfe_dev->lock);
1634 return ret;
1635}
1636
1637static int vpfe_cropcap(struct file *file, void *priv,
1638 struct v4l2_cropcap *crop)
1639{
1640 struct vpfe_device *vpfe_dev = video_drvdata(file);
1641
1642 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
1643
1644 if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1645 return -EINVAL;
1646
1647 memset(crop, 0, sizeof(struct v4l2_cropcap));
1648 crop->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1649 crop->bounds.width = crop->defrect.width =
1650 vpfe_standards[vpfe_dev->std_index].width;
1651 crop->bounds.height = crop->defrect.height =
1652 vpfe_standards[vpfe_dev->std_index].height;
1653 crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1654 return 0;
1655}
1656
1657static int vpfe_g_crop(struct file *file, void *priv,
1658 struct v4l2_crop *crop)
1659{
1660 struct vpfe_device *vpfe_dev = video_drvdata(file);
1661
1662 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_crop\n");
1663
1664 crop->c = vpfe_dev->crop;
1665 return 0;
1666}
1667
1668static int vpfe_s_crop(struct file *file, void *priv,
1669 struct v4l2_crop *crop)
1670{
1671 struct vpfe_device *vpfe_dev = video_drvdata(file);
1672 int ret = 0;
1673
1674 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_crop\n");
1675
1676 if (vpfe_dev->started) {
1677 /* make sure streaming is not started */
1678 v4l2_err(&vpfe_dev->v4l2_dev,
1679 "Cannot change crop when streaming is ON\n");
1680 return -EBUSY;
1681 }
1682
1683 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1684 if (ret)
1685 return ret;
1686
1687 if (crop->c.top < 0 || crop->c.left < 0) {
1688 v4l2_err(&vpfe_dev->v4l2_dev,
1689 "doesn't support negative values for top & left\n");
1690 ret = -EINVAL;
1691 goto unlock_out;
1692 }
1693
1694 /* adjust the width to 16 pixel boundary */
1695 crop->c.width = ((crop->c.width + 15) & ~0xf);
1696
1697 /* make sure parameters are valid */
1698 if ((crop->c.left + crop->c.width >
1699 vpfe_dev->std_info.active_pixels) ||
1700 (crop->c.top + crop->c.height >
1701 vpfe_dev->std_info.active_lines)) {
1702 v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_CROP params\n");
1703 ret = -EINVAL;
1704 goto unlock_out;
1705 }
1706 ccdc_dev->hw_ops.set_image_window(&crop->c);
1707 vpfe_dev->fmt.fmt.pix.width = crop->c.width;
1708 vpfe_dev->fmt.fmt.pix.height = crop->c.height;
1709 vpfe_dev->fmt.fmt.pix.bytesperline =
1710 ccdc_dev->hw_ops.get_line_length();
1711 vpfe_dev->fmt.fmt.pix.sizeimage =
1712 vpfe_dev->fmt.fmt.pix.bytesperline *
1713 vpfe_dev->fmt.fmt.pix.height;
1714 vpfe_dev->crop = crop->c;
1715unlock_out:
1716 mutex_unlock(&vpfe_dev->lock);
1717 return ret;
1718}
1719
1720
1721static long vpfe_param_handler(struct file *file, void *priv,
1722 bool valid_prio, int cmd, void *param)
1723{
1724 struct vpfe_device *vpfe_dev = video_drvdata(file);
1725 int ret = 0;
1726
1727 v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
1728
1729 if (vpfe_dev->started) {
1730 /* only allowed if streaming is not started */
1731 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1732 "device already started\n");
1733 return -EBUSY;
1734 }
1735
1736 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1737 if (ret)
1738 return ret;
1739
1740 switch (cmd) {
1741 case VPFE_CMD_S_CCDC_RAW_PARAMS:
1742 v4l2_warn(&vpfe_dev->v4l2_dev,
1743 "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
1744 if (ccdc_dev->hw_ops.set_params) {
1745 ret = ccdc_dev->hw_ops.set_params(param);
1746 if (ret) {
1747 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1748 "Error setting parameters in CCDC\n");
1749 goto unlock_out;
1750 }
1751 if (vpfe_get_ccdc_image_format(vpfe_dev,
1752 &vpfe_dev->fmt) < 0) {
1753 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1754 "Invalid image format at CCDC\n");
1755 goto unlock_out;
1756 }
1757 } else {
1758 ret = -EINVAL;
1759 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1760 "VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
1761 }
1762 break;
1763 default:
1764 ret = -ENOTTY;
1765 }
1766unlock_out:
1767 mutex_unlock(&vpfe_dev->lock);
1768 return ret;
1769}
1770
1771
1772/* vpfe capture ioctl operations */
1773static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1774 .vidioc_querycap = vpfe_querycap,
1775 .vidioc_g_fmt_vid_cap = vpfe_g_fmt_vid_cap,
1776 .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1777 .vidioc_s_fmt_vid_cap = vpfe_s_fmt_vid_cap,
1778 .vidioc_try_fmt_vid_cap = vpfe_try_fmt_vid_cap,
1779 .vidioc_enum_input = vpfe_enum_input,
1780 .vidioc_g_input = vpfe_g_input,
1781 .vidioc_s_input = vpfe_s_input,
1782 .vidioc_querystd = vpfe_querystd,
1783 .vidioc_s_std = vpfe_s_std,
1784 .vidioc_g_std = vpfe_g_std,
1785 .vidioc_queryctrl = vpfe_queryctrl,
1786 .vidioc_g_ctrl = vpfe_g_ctrl,
1787 .vidioc_s_ctrl = vpfe_s_ctrl,
1788 .vidioc_reqbufs = vpfe_reqbufs,
1789 .vidioc_querybuf = vpfe_querybuf,
1790 .vidioc_qbuf = vpfe_qbuf,
1791 .vidioc_dqbuf = vpfe_dqbuf,
1792 .vidioc_streamon = vpfe_streamon,
1793 .vidioc_streamoff = vpfe_streamoff,
1794 .vidioc_cropcap = vpfe_cropcap,
1795 .vidioc_g_crop = vpfe_g_crop,
1796 .vidioc_s_crop = vpfe_s_crop,
1797 .vidioc_default = vpfe_param_handler,
1798};
1799
1800static struct vpfe_device *vpfe_initialize(void)
1801{
1802 struct vpfe_device *vpfe_dev;
1803
1804 /* Default number of buffers should be 3 */
1805 if ((numbuffers > 0) &&
1806 (numbuffers < config_params.min_numbuffers))
1807 numbuffers = config_params.min_numbuffers;
1808
1809 /*
1810 * Set buffer size to min buffers size if invalid buffer size is
1811 * given
1812 */
1813 if (bufsize < config_params.min_bufsize)
1814 bufsize = config_params.min_bufsize;
1815
1816 config_params.numbuffers = numbuffers;
1817
1818 if (numbuffers)
1819 config_params.device_bufsize = bufsize;
1820
1821 /* Allocate memory for device objects */
1822 vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1823
1824 return vpfe_dev;
1825}
1826
1827/*
1828 * vpfe_probe : This function creates device entries by register
1829 * itself to the V4L2 driver and initializes fields of each
1830 * device objects
1831 */
1832static __init int vpfe_probe(struct platform_device *pdev)
1833{
1834 struct vpfe_subdev_info *sdinfo;
1835 struct vpfe_config *vpfe_cfg;
1836 struct resource *res1;
1837 struct vpfe_device *vpfe_dev;
1838 struct i2c_adapter *i2c_adap;
1839 struct video_device *vfd;
1840 int ret = -ENOMEM, i, j;
1841 int num_subdevs = 0;
1842
1843 /* Get the pointer to the device object */
1844 vpfe_dev = vpfe_initialize();
1845
1846 if (!vpfe_dev) {
1847 v4l2_err(pdev->dev.driver,
1848 "Failed to allocate memory for vpfe_dev\n");
1849 return ret;
1850 }
1851
1852 vpfe_dev->pdev = &pdev->dev;
1853
1854 if (NULL == pdev->dev.platform_data) {
1855 v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1856 ret = -ENODEV;
1857 goto probe_free_dev_mem;
1858 }
1859
1860 vpfe_cfg = pdev->dev.platform_data;
1861 vpfe_dev->cfg = vpfe_cfg;
1862 if (NULL == vpfe_cfg->ccdc ||
1863 NULL == vpfe_cfg->card_name ||
1864 NULL == vpfe_cfg->sub_devs) {
1865 v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1866 ret = -ENOENT;
1867 goto probe_free_dev_mem;
1868 }
1869
1870 /* Allocate memory for ccdc configuration */
1871 ccdc_cfg = kmalloc(sizeof(struct ccdc_config), GFP_KERNEL);
1872 if (NULL == ccdc_cfg) {
1873 v4l2_err(pdev->dev.driver,
1874 "Memory allocation failed for ccdc_cfg\n");
1875 goto probe_free_lock;
1876 }
1877
1878 mutex_lock(&ccdc_lock);
1879
1880 strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
1881 /* Get VINT0 irq resource */
1882 res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1883 if (!res1) {
1884 v4l2_err(pdev->dev.driver,
1885 "Unable to get interrupt for VINT0\n");
1886 ret = -ENODEV;
1887 goto probe_free_ccdc_cfg_mem;
1888 }
1889 vpfe_dev->ccdc_irq0 = res1->start;
1890
1891 /* Get VINT1 irq resource */
1892 res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1893 if (!res1) {
1894 v4l2_err(pdev->dev.driver,
1895 "Unable to get interrupt for VINT1\n");
1896 ret = -ENODEV;
1897 goto probe_free_ccdc_cfg_mem;
1898 }
1899 vpfe_dev->ccdc_irq1 = res1->start;
1900
1901 ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, IRQF_DISABLED,
1902 "vpfe_capture0", vpfe_dev);
1903
1904 if (0 != ret) {
1905 v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1906 goto probe_free_ccdc_cfg_mem;
1907 }
1908
1909 /* Allocate memory for video device */
1910 vfd = video_device_alloc();
1911 if (NULL == vfd) {
1912 ret = -ENOMEM;
1913 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
1914 goto probe_out_release_irq;
1915 }
1916
1917 /* Initialize field of video device */
1918 vfd->release = video_device_release;
1919 vfd->fops = &vpfe_fops;
1920 vfd->ioctl_ops = &vpfe_ioctl_ops;
1921 vfd->tvnorms = 0;
1922 vfd->current_norm = V4L2_STD_PAL;
1923 vfd->v4l2_dev = &vpfe_dev->v4l2_dev;
1924 snprintf(vfd->name, sizeof(vfd->name),
1925 "%s_V%d.%d.%d",
1926 CAPTURE_DRV_NAME,
1927 (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1928 (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1929 (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1930 /* Set video_dev to the video device */
1931 vpfe_dev->video_dev = vfd;
1932
1933 ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1934 if (ret) {
1935 v4l2_err(pdev->dev.driver,
1936 "Unable to register v4l2 device.\n");
1937 goto probe_out_video_release;
1938 }
1939 v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1940 spin_lock_init(&vpfe_dev->irqlock);
1941 spin_lock_init(&vpfe_dev->dma_queue_lock);
1942 mutex_init(&vpfe_dev->lock);
1943
1944 /* Initialize field of the device objects */
1945 vpfe_dev->numbuffers = config_params.numbuffers;
1946
1947 /* Initialize prio member of device object */
1948 v4l2_prio_init(&vpfe_dev->prio);
1949 /* register video device */
1950 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1951 "trying to register vpfe device.\n");
1952 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1953 "video_dev=%x\n", (int)&vpfe_dev->video_dev);
1954 vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1955 ret = video_register_device(vpfe_dev->video_dev,
1956 VFL_TYPE_GRABBER, -1);
1957
1958 if (ret) {
1959 v4l2_err(pdev->dev.driver,
1960 "Unable to register video device.\n");
1961 goto probe_out_v4l2_unregister;
1962 }
1963
1964 v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1965 /* set the driver data in platform device */
1966 platform_set_drvdata(pdev, vpfe_dev);
1967 /* set driver private data */
1968 video_set_drvdata(vpfe_dev->video_dev, vpfe_dev);
1969 i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
1970 num_subdevs = vpfe_cfg->num_subdevs;
1971 vpfe_dev->sd = kmalloc(sizeof(struct v4l2_subdev *) * num_subdevs,
1972 GFP_KERNEL);
1973 if (NULL == vpfe_dev->sd) {
1974 v4l2_err(&vpfe_dev->v4l2_dev,
1975 "unable to allocate memory for subdevice pointers\n");
1976 ret = -ENOMEM;
1977 goto probe_out_video_unregister;
1978 }
1979
1980 for (i = 0; i < num_subdevs; i++) {
1981 struct v4l2_input *inps;
1982
1983 sdinfo = &vpfe_cfg->sub_devs[i];
1984
1985 /* Load up the subdevice */
1986 vpfe_dev->sd[i] =
1987 v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
1988 i2c_adap,
1989 &sdinfo->board_info,
1990 NULL);
1991 if (vpfe_dev->sd[i]) {
1992 v4l2_info(&vpfe_dev->v4l2_dev,
1993 "v4l2 sub device %s registered\n",
1994 sdinfo->name);
1995 vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
1996 /* update tvnorms from the sub devices */
1997 for (j = 0; j < sdinfo->num_inputs; j++) {
1998 inps = &sdinfo->inputs[j];
1999 vfd->tvnorms |= inps->std;
2000 }
2001 } else {
2002 v4l2_info(&vpfe_dev->v4l2_dev,
2003 "v4l2 sub device %s register fails\n",
2004 sdinfo->name);
2005 goto probe_sd_out;
2006 }
2007 }
2008
2009 /* set first sub device as current one */
2010 vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
2011
2012 /* We have at least one sub device to work with */
2013 mutex_unlock(&ccdc_lock);
2014 return 0;
2015
2016probe_sd_out:
2017 kfree(vpfe_dev->sd);
2018probe_out_video_unregister:
2019 video_unregister_device(vpfe_dev->video_dev);
2020probe_out_v4l2_unregister:
2021 v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2022probe_out_video_release:
2023 if (!video_is_registered(vpfe_dev->video_dev))
2024 video_device_release(vpfe_dev->video_dev);
2025probe_out_release_irq:
2026 free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2027probe_free_ccdc_cfg_mem:
2028 kfree(ccdc_cfg);
2029probe_free_lock:
2030 mutex_unlock(&ccdc_lock);
2031probe_free_dev_mem:
2032 kfree(vpfe_dev);
2033 return ret;
2034}
2035
2036/*
2037 * vpfe_remove : It un-register device from V4L2 driver
2038 */
2039static int __devexit vpfe_remove(struct platform_device *pdev)
2040{
2041 struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
2042
2043 v4l2_info(pdev->dev.driver, "vpfe_remove\n");
2044
2045 free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2046 kfree(vpfe_dev->sd);
2047 v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2048 video_unregister_device(vpfe_dev->video_dev);
2049 kfree(vpfe_dev);
2050 kfree(ccdc_cfg);
2051 return 0;
2052}
2053
2054static int vpfe_suspend(struct device *dev)
2055{
2056 return 0;
2057}
2058
2059static int vpfe_resume(struct device *dev)
2060{
2061 return 0;
2062}
2063
2064static const struct dev_pm_ops vpfe_dev_pm_ops = {
2065 .suspend = vpfe_suspend,
2066 .resume = vpfe_resume,
2067};
2068
2069static struct platform_driver vpfe_driver = {
2070 .driver = {
2071 .name = CAPTURE_DRV_NAME,
2072 .owner = THIS_MODULE,
2073 .pm = &vpfe_dev_pm_ops,
2074 },
2075 .probe = vpfe_probe,
2076 .remove = __devexit_p(vpfe_remove),
2077};
2078
2079module_platform_driver(vpfe_driver);