Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/media/platform/davinci/vpfe_capture.c

  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 
 79 static int debug;
 80 static u32 numbuffers = 3;
 81 static u32 bufsize = (720 * 576 * 2);
 82 
 83 module_param(numbuffers, uint, S_IRUGO);
 84 module_param(bufsize, uint, S_IRUGO);
 85 module_param(debug, int, 0644);
 86 
 87 MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
 88 MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
 89 MODULE_PARM_DESC(debug, "Debug level 0-1");
 90 
 91 MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
 92 MODULE_LICENSE("GPL");
 93 MODULE_AUTHOR("Texas Instruments");
 94 
 95 /* standard information */
 96 struct 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 */
106 struct 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 */
114 static 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 */
122 static struct ccdc_hw_device *ccdc_dev;
123 /* lock for accessing ccdc information */
124 static DEFINE_MUTEX(ccdc_lock);
125 /* ccdc configuration */
126 static struct ccdc_config *ccdc_cfg;
127 
128 static const 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 */
134 static 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  */
195 static 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  */
210 int 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;
256 unlock:
257         mutex_unlock(&ccdc_lock);
258         return ret;
259 }
260 EXPORT_SYMBOL(vpfe_register_ccdc_device);
261 
262 /*
263  * vpfe_unregister_ccdc_device. CCDC module calls this to
264  * unregister with vpfe capture
265  */
266 void 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 }
286 EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
287 
288 /*
289  * vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
290  */
291 static 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  */
331 static 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  */
378 static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
379                                     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         pix->bytesperline = ccdc_dev->hw_ops.get_line_length();
446         pix->sizeimage = pix->bytesperline * pix->height;
447 
448         return 0;
449 }
450 
451 static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
452 {
453         int ret = 0;
454 
455         /* set first input of current subdevice as the current input */
456         vpfe_dev->current_input = 0;
457 
458         /* set default standard */
459         vpfe_dev->std_index = 0;
460 
461         /* Configure the default format information */
462         ret = vpfe_config_image_format(vpfe_dev,
463                                 vpfe_standards[vpfe_dev->std_index].std_id);
464         if (ret)
465                 return ret;
466 
467         /* now open the ccdc device to initialize it */
468         mutex_lock(&ccdc_lock);
469         if (NULL == ccdc_dev) {
470                 v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
471                 ret = -ENODEV;
472                 goto unlock;
473         }
474 
475         if (!try_module_get(ccdc_dev->owner)) {
476                 v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
477                 ret = -ENODEV;
478                 goto unlock;
479         }
480         ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
481         if (!ret)
482                 vpfe_dev->initialized = 1;
483 
484         /* Clear all VPFE/CCDC interrupts */
485         if (vpfe_dev->cfg->clr_intr)
486                 vpfe_dev->cfg->clr_intr(-1);
487 
488 unlock:
489         mutex_unlock(&ccdc_lock);
490         return ret;
491 }
492 
493 /*
494  * vpfe_open : It creates object of file handle structure and
495  * stores it in private_data  member of filepointer
496  */
497 static int vpfe_open(struct file *file)
498 {
499         struct vpfe_device *vpfe_dev = video_drvdata(file);
500         struct video_device *vdev = video_devdata(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         v4l2_fh_init(&fh->fh, vdev);
521         mutex_lock(&vpfe_dev->lock);
522         /* If decoder is not initialized. initialize it */
523         if (!vpfe_dev->initialized) {
524                 if (vpfe_initialize_device(vpfe_dev)) {
525                         mutex_unlock(&vpfe_dev->lock);
526                         return -ENODEV;
527                 }
528         }
529         /* Increment device usrs counter */
530         vpfe_dev->usrs++;
531         /* Set io_allowed member to false */
532         fh->io_allowed = 0;
533         v4l2_fh_add(&fh->fh);
534         mutex_unlock(&vpfe_dev->lock);
535         return 0;
536 }
537 
538 static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
539 {
540         unsigned long addr;
541 
542         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
543                                         struct videobuf_buffer, queue);
544         list_del(&vpfe_dev->next_frm->queue);
545         vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
546         addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
547 
548         ccdc_dev->hw_ops.setfbaddr(addr);
549 }
550 
551 static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev)
552 {
553         unsigned long addr;
554 
555         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
556         addr += vpfe_dev->field_off;
557         ccdc_dev->hw_ops.setfbaddr(addr);
558 }
559 
560 static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
561 {
562         v4l2_get_timestamp(&vpfe_dev->cur_frm->ts);
563         vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
564         vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
565         wake_up_interruptible(&vpfe_dev->cur_frm->done);
566         vpfe_dev->cur_frm = vpfe_dev->next_frm;
567 }
568 
569 /* ISR for VINT0*/
570 static irqreturn_t vpfe_isr(int irq, void *dev_id)
571 {
572         struct vpfe_device *vpfe_dev = dev_id;
573         enum v4l2_field field;
574         int fid;
575 
576         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
577         field = vpfe_dev->fmt.fmt.pix.field;
578 
579         /* if streaming not started, don't do anything */
580         if (!vpfe_dev->started)
581                 goto clear_intr;
582 
583         /* only for 6446 this will be applicable */
584         if (NULL != ccdc_dev->hw_ops.reset)
585                 ccdc_dev->hw_ops.reset();
586 
587         if (field == V4L2_FIELD_NONE) {
588                 /* handle progressive frame capture */
589                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
590                         "frame format is progressive...\n");
591                 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
592                         vpfe_process_buffer_complete(vpfe_dev);
593                 goto clear_intr;
594         }
595 
596         /* interlaced or TB capture check which field we are in hardware */
597         fid = ccdc_dev->hw_ops.getfid();
598 
599         /* switch the software maintained field id */
600         vpfe_dev->field_id ^= 1;
601         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
602                 fid, vpfe_dev->field_id);
603         if (fid == vpfe_dev->field_id) {
604                 /* we are in-sync here,continue */
605                 if (fid == 0) {
606                         /*
607                          * One frame is just being captured. If the next frame
608                          * is available, release the current frame and move on
609                          */
610                         if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
611                                 vpfe_process_buffer_complete(vpfe_dev);
612                         /*
613                          * based on whether the two fields are stored
614                          * interleavely or separately in memory, reconfigure
615                          * the CCDC memory address
616                          */
617                         if (field == V4L2_FIELD_SEQ_TB) {
618                                 vpfe_schedule_bottom_field(vpfe_dev);
619                         }
620                         goto clear_intr;
621                 }
622                 /*
623                  * if one field is just being captured configure
624                  * the next frame get the next frame from the empty
625                  * queue if no frame is available hold on to the
626                  * current buffer
627                  */
628                 spin_lock(&vpfe_dev->dma_queue_lock);
629                 if (!list_empty(&vpfe_dev->dma_queue) &&
630                     vpfe_dev->cur_frm == vpfe_dev->next_frm)
631                         vpfe_schedule_next_buffer(vpfe_dev);
632                 spin_unlock(&vpfe_dev->dma_queue_lock);
633         } else if (fid == 0) {
634                 /*
635                  * out of sync. Recover from any hardware out-of-sync.
636                  * May loose one frame
637                  */
638                 vpfe_dev->field_id = fid;
639         }
640 clear_intr:
641         if (vpfe_dev->cfg->clr_intr)
642                 vpfe_dev->cfg->clr_intr(irq);
643 
644         return IRQ_HANDLED;
645 }
646 
647 /* vdint1_isr - isr handler for VINT1 interrupt */
648 static irqreturn_t vdint1_isr(int irq, void *dev_id)
649 {
650         struct vpfe_device *vpfe_dev = dev_id;
651 
652         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
653 
654         /* if streaming not started, don't do anything */
655         if (!vpfe_dev->started) {
656                 if (vpfe_dev->cfg->clr_intr)
657                         vpfe_dev->cfg->clr_intr(irq);
658                 return IRQ_HANDLED;
659         }
660 
661         spin_lock(&vpfe_dev->dma_queue_lock);
662         if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
663             !list_empty(&vpfe_dev->dma_queue) &&
664             vpfe_dev->cur_frm == vpfe_dev->next_frm)
665                 vpfe_schedule_next_buffer(vpfe_dev);
666         spin_unlock(&vpfe_dev->dma_queue_lock);
667 
668         if (vpfe_dev->cfg->clr_intr)
669                 vpfe_dev->cfg->clr_intr(irq);
670 
671         return IRQ_HANDLED;
672 }
673 
674 static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
675 {
676         enum ccdc_frmfmt frame_format;
677 
678         frame_format = ccdc_dev->hw_ops.get_frame_format();
679         if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
680                 free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
681 }
682 
683 static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
684 {
685         enum ccdc_frmfmt frame_format;
686 
687         frame_format = ccdc_dev->hw_ops.get_frame_format();
688         if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
689                 return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
690                                     0, "vpfe_capture1",
691                                     vpfe_dev);
692         }
693         return 0;
694 }
695 
696 /* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
697 static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
698 {
699         vpfe_dev->started = 0;
700         ccdc_dev->hw_ops.enable(0);
701         if (ccdc_dev->hw_ops.enable_out_to_sdram)
702                 ccdc_dev->hw_ops.enable_out_to_sdram(0);
703 }
704 
705 /*
706  * vpfe_release : This function deletes buffer queue, frees the
707  * buffers and the vpfe file  handle
708  */
709 static int vpfe_release(struct file *file)
710 {
711         struct vpfe_device *vpfe_dev = video_drvdata(file);
712         struct vpfe_fh *fh = file->private_data;
713         struct vpfe_subdev_info *sdinfo;
714         int ret;
715 
716         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
717 
718         /* Get the device lock */
719         mutex_lock(&vpfe_dev->lock);
720         /* if this instance is doing IO */
721         if (fh->io_allowed) {
722                 if (vpfe_dev->started) {
723                         sdinfo = vpfe_dev->current_subdev;
724                         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
725                                                          sdinfo->grp_id,
726                                                          video, s_stream, 0);
727                         if (ret && (ret != -ENOIOCTLCMD))
728                                 v4l2_err(&vpfe_dev->v4l2_dev,
729                                 "stream off failed in subdev\n");
730                         vpfe_stop_ccdc_capture(vpfe_dev);
731                         vpfe_detach_irq(vpfe_dev);
732                         videobuf_streamoff(&vpfe_dev->buffer_queue);
733                 }
734                 vpfe_dev->io_usrs = 0;
735                 vpfe_dev->numbuffers = config_params.numbuffers;
736                 videobuf_stop(&vpfe_dev->buffer_queue);
737                 videobuf_mmap_free(&vpfe_dev->buffer_queue);
738         }
739 
740         /* Decrement device usrs counter */
741         vpfe_dev->usrs--;
742         v4l2_fh_del(&fh->fh);
743         v4l2_fh_exit(&fh->fh);
744         /* If this is the last file handle */
745         if (!vpfe_dev->usrs) {
746                 vpfe_dev->initialized = 0;
747                 if (ccdc_dev->hw_ops.close)
748                         ccdc_dev->hw_ops.close(vpfe_dev->pdev);
749                 module_put(ccdc_dev->owner);
750         }
751         mutex_unlock(&vpfe_dev->lock);
752         file->private_data = NULL;
753         /* Free memory allocated to file handle object */
754         kfree(fh);
755         return 0;
756 }
757 
758 /*
759  * vpfe_mmap : It is used to map kernel space buffers
760  * into user spaces
761  */
762 static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
763 {
764         /* Get the device object and file handle object */
765         struct vpfe_device *vpfe_dev = video_drvdata(file);
766 
767         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
768 
769         return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
770 }
771 
772 /*
773  * vpfe_poll: It is used for select/poll system call
774  */
775 static unsigned int vpfe_poll(struct file *file, poll_table *wait)
776 {
777         struct vpfe_device *vpfe_dev = video_drvdata(file);
778 
779         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
780 
781         if (vpfe_dev->started)
782                 return videobuf_poll_stream(file,
783                                             &vpfe_dev->buffer_queue, wait);
784         return 0;
785 }
786 
787 /* vpfe capture driver file operations */
788 static const struct v4l2_file_operations vpfe_fops = {
789         .owner = THIS_MODULE,
790         .open = vpfe_open,
791         .release = vpfe_release,
792         .unlocked_ioctl = video_ioctl2,
793         .mmap = vpfe_mmap,
794         .poll = vpfe_poll
795 };
796 
797 /*
798  * vpfe_check_format()
799  * This function adjust the input pixel format as per hardware
800  * capabilities and update the same in pixfmt.
801  * Following algorithm used :-
802  *
803  *      If given pixformat is not in the vpfe list of pix formats or not
804  *      supported by the hardware, current value of pixformat in the device
805  *      is used
806  *      If given field is not supported, then current field is used. If field
807  *      is different from current, then it is matched with that from sub device.
808  *      Minimum height is 2 lines for interlaced or tb field and 1 line for
809  *      progressive. Maximum height is clamped to active active lines of scan
810  *      Minimum width is 32 bytes in memory and width is clamped to active
811  *      pixels of scan.
812  *      bytesperline is a multiple of 32.
813  */
814 static const struct vpfe_pixel_format *
815         vpfe_check_format(struct vpfe_device *vpfe_dev,
816                           struct v4l2_pix_format *pixfmt)
817 {
818         u32 min_height = 1, min_width = 32, max_width, max_height;
819         const struct vpfe_pixel_format *vpfe_pix_fmt;
820         u32 pix;
821         int temp, found;
822 
823         vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
824         if (NULL == vpfe_pix_fmt) {
825                 /*
826                  * use current pixel format in the vpfe device. We
827                  * will find this pix format in the table
828                  */
829                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
830                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
831         }
832 
833         /* check if hw supports it */
834         temp = 0;
835         found = 0;
836         while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
837                 if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
838                         found = 1;
839                         break;
840                 }
841                 temp++;
842         }
843 
844         if (!found) {
845                 /* use current pixel format */
846                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
847                 /*
848                  * Since this is currently used in the vpfe device, we
849                  * will find this pix format in the table
850                  */
851                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
852         }
853 
854         /* check what field format is supported */
855         if (pixfmt->field == V4L2_FIELD_ANY) {
856                 /* if field is any, use current value as default */
857                 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
858         }
859 
860         /*
861          * if field is not same as current field in the vpfe device
862          * try matching the field with the sub device field
863          */
864         if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
865                 /*
866                  * If field value is not in the supported fields, use current
867                  * field used in the device as default
868                  */
869                 switch (pixfmt->field) {
870                 case V4L2_FIELD_INTERLACED:
871                 case V4L2_FIELD_SEQ_TB:
872                         /* if sub device is supporting progressive, use that */
873                         if (!vpfe_dev->std_info.frame_format)
874                                 pixfmt->field = V4L2_FIELD_NONE;
875                         break;
876                 case V4L2_FIELD_NONE:
877                         if (vpfe_dev->std_info.frame_format)
878                                 pixfmt->field = V4L2_FIELD_INTERLACED;
879                         break;
880 
881                 default:
882                         /* use current field as default */
883                         pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
884                         break;
885                 }
886         }
887 
888         /* Now adjust image resolutions supported */
889         if (pixfmt->field == V4L2_FIELD_INTERLACED ||
890             pixfmt->field == V4L2_FIELD_SEQ_TB)
891                 min_height = 2;
892 
893         max_width = vpfe_dev->std_info.active_pixels;
894         max_height = vpfe_dev->std_info.active_lines;
895         min_width /= vpfe_pix_fmt->bpp;
896 
897         v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
898                   pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
899 
900         pixfmt->width = clamp((pixfmt->width), min_width, max_width);
901         pixfmt->height = clamp((pixfmt->height), min_height, max_height);
902 
903         /* If interlaced, adjust height to be a multiple of 2 */
904         if (pixfmt->field == V4L2_FIELD_INTERLACED)
905                 pixfmt->height &= (~1);
906         /*
907          * recalculate bytesperline and sizeimage since width
908          * and height might have changed
909          */
910         pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
911                                 & ~31);
912         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
913                 pixfmt->sizeimage =
914                         pixfmt->bytesperline * pixfmt->height +
915                         ((pixfmt->bytesperline * pixfmt->height) >> 1);
916         else
917                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
918 
919         v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height ="
920                  " %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
921                  pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
922                  pixfmt->bytesperline, pixfmt->sizeimage);
923         return vpfe_pix_fmt;
924 }
925 
926 static int vpfe_querycap(struct file *file, void  *priv,
927                                struct v4l2_capability *cap)
928 {
929         struct vpfe_device *vpfe_dev = video_drvdata(file);
930 
931         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
932 
933         cap->version = VPFE_CAPTURE_VERSION_CODE;
934         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
935         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
936         strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
937         strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
938         return 0;
939 }
940 
941 static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
942                                 struct v4l2_format *fmt)
943 {
944         struct vpfe_device *vpfe_dev = video_drvdata(file);
945 
946         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
947         /* Fill in the information about format */
948         *fmt = vpfe_dev->fmt;
949         return 0;
950 }
951 
952 static int vpfe_enum_fmt_vid_cap(struct file *file, void  *priv,
953                                    struct v4l2_fmtdesc *fmt)
954 {
955         struct vpfe_device *vpfe_dev = video_drvdata(file);
956         const struct vpfe_pixel_format *pix_fmt;
957         int temp_index;
958         u32 pix;
959 
960         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
961 
962         if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
963                 return -EINVAL;
964 
965         /* Fill in the information about format */
966         pix_fmt = vpfe_lookup_pix_format(pix);
967         if (NULL != pix_fmt) {
968                 temp_index = fmt->index;
969                 *fmt = pix_fmt->fmtdesc;
970                 fmt->index = temp_index;
971                 return 0;
972         }
973         return -EINVAL;
974 }
975 
976 static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
977                                 struct v4l2_format *fmt)
978 {
979         struct vpfe_device *vpfe_dev = video_drvdata(file);
980         const struct vpfe_pixel_format *pix_fmts;
981         int ret = 0;
982 
983         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
984 
985         /* If streaming is started, return error */
986         if (vpfe_dev->started) {
987                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
988                 return -EBUSY;
989         }
990 
991         /* Check for valid frame format */
992         pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
993 
994         if (NULL == pix_fmts)
995                 return -EINVAL;
996 
997         /* store the pixel format in the device  object */
998         ret = mutex_lock_interruptible(&vpfe_dev->lock);
999         if (ret)
1000                 return ret;
1001 
1002         /* First detach any IRQ if currently attached */
1003         vpfe_detach_irq(vpfe_dev);
1004         vpfe_dev->fmt = *fmt;
1005         /* set image capture parameters in the ccdc */
1006         ret = vpfe_config_ccdc_image_format(vpfe_dev);
1007         mutex_unlock(&vpfe_dev->lock);
1008         return ret;
1009 }
1010 
1011 static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
1012                                   struct v4l2_format *f)
1013 {
1014         struct vpfe_device *vpfe_dev = video_drvdata(file);
1015         const struct vpfe_pixel_format *pix_fmts;
1016 
1017         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
1018 
1019         pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
1020         if (NULL == pix_fmts)
1021                 return -EINVAL;
1022         return 0;
1023 }
1024 
1025 /*
1026  * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1027  * given app input index
1028  */
1029 static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
1030                                         int *subdev_index,
1031                                         int *subdev_input_index,
1032                                         int app_input_index)
1033 {
1034         struct vpfe_config *cfg = vpfe_dev->cfg;
1035         struct vpfe_subdev_info *sdinfo;
1036         int i, j = 0;
1037 
1038         for (i = 0; i < cfg->num_subdevs; i++) {
1039                 sdinfo = &cfg->sub_devs[i];
1040                 if (app_input_index < (j + sdinfo->num_inputs)) {
1041                         *subdev_index = i;
1042                         *subdev_input_index = app_input_index - j;
1043                         return 0;
1044                 }
1045                 j += sdinfo->num_inputs;
1046         }
1047         return -EINVAL;
1048 }
1049 
1050 /*
1051  * vpfe_get_app_input - Get app input index for a given subdev input index
1052  * driver stores the input index of the current sub device and translate it
1053  * when application request the current input
1054  */
1055 static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
1056                                     int *app_input_index)
1057 {
1058         struct vpfe_config *cfg = vpfe_dev->cfg;
1059         struct vpfe_subdev_info *sdinfo;
1060         int i, j = 0;
1061 
1062         for (i = 0; i < cfg->num_subdevs; i++) {
1063                 sdinfo = &cfg->sub_devs[i];
1064                 if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
1065                         if (vpfe_dev->current_input >= sdinfo->num_inputs)
1066                                 return -1;
1067                         *app_input_index = j + vpfe_dev->current_input;
1068                         return 0;
1069                 }
1070                 j += sdinfo->num_inputs;
1071         }
1072         return -EINVAL;
1073 }
1074 
1075 static int vpfe_enum_input(struct file *file, void *priv,
1076                                  struct v4l2_input *inp)
1077 {
1078         struct vpfe_device *vpfe_dev = video_drvdata(file);
1079         struct vpfe_subdev_info *sdinfo;
1080         int subdev, index ;
1081 
1082         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
1083 
1084         if (vpfe_get_subdev_input_index(vpfe_dev,
1085                                         &subdev,
1086                                         &index,
1087                                         inp->index) < 0) {
1088                 v4l2_err(&vpfe_dev->v4l2_dev, "input information not found"
1089                          " for the subdev\n");
1090                 return -EINVAL;
1091         }
1092         sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1093         memcpy(inp, &sdinfo->inputs[index], sizeof(struct v4l2_input));
1094         return 0;
1095 }
1096 
1097 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1098 {
1099         struct vpfe_device *vpfe_dev = video_drvdata(file);
1100 
1101         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1102 
1103         return vpfe_get_app_input_index(vpfe_dev, index);
1104 }
1105 
1106 
1107 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1108 {
1109         struct vpfe_device *vpfe_dev = video_drvdata(file);
1110         struct v4l2_subdev *sd;
1111         struct vpfe_subdev_info *sdinfo;
1112         int subdev_index, inp_index;
1113         struct vpfe_route *route;
1114         u32 input = 0, output = 0;
1115         int ret = -EINVAL;
1116 
1117         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
1118 
1119         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1120         if (ret)
1121                 return ret;
1122 
1123         /*
1124          * If streaming is started return device busy
1125          * error
1126          */
1127         if (vpfe_dev->started) {
1128                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
1129                 ret = -EBUSY;
1130                 goto unlock_out;
1131         }
1132         ret = vpfe_get_subdev_input_index(vpfe_dev,
1133                                           &subdev_index,
1134                                           &inp_index,
1135                                           index);
1136         if (ret < 0) {
1137                 v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
1138                 goto unlock_out;
1139         }
1140 
1141         sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
1142         sd = vpfe_dev->sd[subdev_index];
1143         route = &sdinfo->routes[inp_index];
1144         if (route && sdinfo->can_route) {
1145                 input = route->input;
1146                 output = route->output;
1147         }
1148 
1149         if (sd)
1150                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1151 
1152         if (ret) {
1153                 v4l2_err(&vpfe_dev->v4l2_dev,
1154                         "vpfe_doioctl:error in setting input in decoder\n");
1155                 ret = -EINVAL;
1156                 goto unlock_out;
1157         }
1158         vpfe_dev->current_subdev = sdinfo;
1159         if (sd)
1160                 vpfe_dev->v4l2_dev.ctrl_handler = sd->ctrl_handler;
1161         vpfe_dev->current_input = index;
1162         vpfe_dev->std_index = 0;
1163 
1164         /* set the bus/interface parameter for the sub device in ccdc */
1165         ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1166         if (ret)
1167                 goto unlock_out;
1168 
1169         /* set the default image parameters in the device */
1170         ret = vpfe_config_image_format(vpfe_dev,
1171                                 vpfe_standards[vpfe_dev->std_index].std_id);
1172 unlock_out:
1173         mutex_unlock(&vpfe_dev->lock);
1174         return ret;
1175 }
1176 
1177 static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1178 {
1179         struct vpfe_device *vpfe_dev = video_drvdata(file);
1180         struct vpfe_subdev_info *sdinfo;
1181         int ret = 0;
1182 
1183         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1184 
1185         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1186         sdinfo = vpfe_dev->current_subdev;
1187         if (ret)
1188                 return ret;
1189         /* Call querystd function of decoder device */
1190         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1191                                          video, querystd, std_id);
1192         mutex_unlock(&vpfe_dev->lock);
1193         return ret;
1194 }
1195 
1196 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1197 {
1198         struct vpfe_device *vpfe_dev = video_drvdata(file);
1199         struct vpfe_subdev_info *sdinfo;
1200         int ret = 0;
1201 
1202         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1203 
1204         /* Call decoder driver function to set the standard */
1205         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1206         if (ret)
1207                 return ret;
1208 
1209         sdinfo = vpfe_dev->current_subdev;
1210         /* If streaming is started, return device busy error */
1211         if (vpfe_dev->started) {
1212                 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1213                 ret = -EBUSY;
1214                 goto unlock_out;
1215         }
1216 
1217         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1218                                          video, s_std, std_id);
1219         if (ret < 0) {
1220                 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1221                 goto unlock_out;
1222         }
1223         ret = vpfe_config_image_format(vpfe_dev, std_id);
1224 
1225 unlock_out:
1226         mutex_unlock(&vpfe_dev->lock);
1227         return ret;
1228 }
1229 
1230 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1231 {
1232         struct vpfe_device *vpfe_dev = video_drvdata(file);
1233 
1234         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1235 
1236         *std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1237         return 0;
1238 }
1239 /*
1240  *  Videobuf operations
1241  */
1242 static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1243                                 unsigned int *count,
1244                                 unsigned int *size)
1245 {
1246         struct vpfe_fh *fh = vq->priv_data;
1247         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1248 
1249         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1250         *size = vpfe_dev->fmt.fmt.pix.sizeimage;
1251         if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
1252                 vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
1253                 *size = config_params.device_bufsize;
1254 
1255         if (*count < config_params.min_numbuffers)
1256                 *count = config_params.min_numbuffers;
1257         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1258                 "count=%d, size=%d\n", *count, *size);
1259         return 0;
1260 }
1261 
1262 static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1263                                 struct videobuf_buffer *vb,
1264                                 enum v4l2_field field)
1265 {
1266         struct vpfe_fh *fh = vq->priv_data;
1267         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1268         unsigned long addr;
1269         int ret;
1270 
1271         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1272 
1273         /* If buffer is not initialized, initialize it */
1274         if (VIDEOBUF_NEEDS_INIT == vb->state) {
1275                 vb->width = vpfe_dev->fmt.fmt.pix.width;
1276                 vb->height = vpfe_dev->fmt.fmt.pix.height;
1277                 vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1278                 vb->field = field;
1279 
1280                 ret = videobuf_iolock(vq, vb, NULL);
1281                 if (ret < 0)
1282                         return ret;
1283 
1284                 addr = videobuf_to_dma_contig(vb);
1285                 /* Make sure user addresses are aligned to 32 bytes */
1286                 if (!ALIGN(addr, 32))
1287                         return -EINVAL;
1288 
1289                 vb->state = VIDEOBUF_PREPARED;
1290         }
1291         return 0;
1292 }
1293 
1294 static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1295                                 struct videobuf_buffer *vb)
1296 {
1297         /* Get the file handle object and device object */
1298         struct vpfe_fh *fh = vq->priv_data;
1299         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1300         unsigned long flags;
1301 
1302         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1303 
1304         /* add the buffer to the DMA queue */
1305         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1306         list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1307         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1308 
1309         /* Change state of the buffer */
1310         vb->state = VIDEOBUF_QUEUED;
1311 }
1312 
1313 static void vpfe_videobuf_release(struct videobuf_queue *vq,
1314                                   struct videobuf_buffer *vb)
1315 {
1316         struct vpfe_fh *fh = vq->priv_data;
1317         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1318         unsigned long flags;
1319 
1320         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1321 
1322         /*
1323          * We need to flush the buffer from the dma queue since
1324          * they are de-allocated
1325          */
1326         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1327         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1328         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1329         videobuf_dma_contig_free(vq, vb);
1330         vb->state = VIDEOBUF_NEEDS_INIT;
1331 }
1332 
1333 static struct videobuf_queue_ops vpfe_videobuf_qops = {
1334         .buf_setup      = vpfe_videobuf_setup,
1335         .buf_prepare    = vpfe_videobuf_prepare,
1336         .buf_queue      = vpfe_videobuf_queue,
1337         .buf_release    = vpfe_videobuf_release,
1338 };
1339 
1340 /*
1341  * vpfe_reqbufs. currently support REQBUF only once opening
1342  * the device.
1343  */
1344 static int vpfe_reqbufs(struct file *file, void *priv,
1345                         struct v4l2_requestbuffers *req_buf)
1346 {
1347         struct vpfe_device *vpfe_dev = video_drvdata(file);
1348         struct vpfe_fh *fh = file->private_data;
1349         int ret = 0;
1350 
1351         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1352 
1353         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1354                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1355                 return -EINVAL;
1356         }
1357 
1358         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1359         if (ret)
1360                 return ret;
1361 
1362         if (vpfe_dev->io_usrs != 0) {
1363                 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1364                 ret = -EBUSY;
1365                 goto unlock_out;
1366         }
1367 
1368         vpfe_dev->memory = req_buf->memory;
1369         videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1370                                 &vpfe_videobuf_qops,
1371                                 vpfe_dev->pdev,
1372                                 &vpfe_dev->irqlock,
1373                                 req_buf->type,
1374                                 vpfe_dev->fmt.fmt.pix.field,
1375                                 sizeof(struct videobuf_buffer),
1376                                 fh, NULL);
1377 
1378         fh->io_allowed = 1;
1379         vpfe_dev->io_usrs = 1;
1380         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1381         ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1382 unlock_out:
1383         mutex_unlock(&vpfe_dev->lock);
1384         return ret;
1385 }
1386 
1387 static int vpfe_querybuf(struct file *file, void *priv,
1388                          struct v4l2_buffer *buf)
1389 {
1390         struct vpfe_device *vpfe_dev = video_drvdata(file);
1391 
1392         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1393 
1394         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1395                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1396                 return  -EINVAL;
1397         }
1398 
1399         if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1400                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1401                 return -EINVAL;
1402         }
1403         /* Call videobuf_querybuf to get information */
1404         return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1405 }
1406 
1407 static int vpfe_qbuf(struct file *file, void *priv,
1408                      struct v4l2_buffer *p)
1409 {
1410         struct vpfe_device *vpfe_dev = video_drvdata(file);
1411         struct vpfe_fh *fh = file->private_data;
1412 
1413         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1414 
1415         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1416                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1417                 return -EINVAL;
1418         }
1419 
1420         /*
1421          * If this file handle is not allowed to do IO,
1422          * return error
1423          */
1424         if (!fh->io_allowed) {
1425                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1426                 return -EACCES;
1427         }
1428         return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1429 }
1430 
1431 static int vpfe_dqbuf(struct file *file, void *priv,
1432                       struct v4l2_buffer *buf)
1433 {
1434         struct vpfe_device *vpfe_dev = video_drvdata(file);
1435 
1436         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1437 
1438         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1439                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1440                 return -EINVAL;
1441         }
1442         return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1443                                       buf, file->f_flags & O_NONBLOCK);
1444 }
1445 
1446 /*
1447  * vpfe_calculate_offsets : This function calculates buffers offset
1448  * for top and bottom field
1449  */
1450 static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1451 {
1452         struct v4l2_rect image_win;
1453 
1454         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1455 
1456         ccdc_dev->hw_ops.get_image_window(&image_win);
1457         vpfe_dev->field_off = image_win.height * image_win.width;
1458 }
1459 
1460 /* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1461 static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1462 {
1463         ccdc_dev->hw_ops.enable(1);
1464         if (ccdc_dev->hw_ops.enable_out_to_sdram)
1465                 ccdc_dev->hw_ops.enable_out_to_sdram(1);
1466         vpfe_dev->started = 1;
1467 }
1468 
1469 /*
1470  * vpfe_streamon. Assume the DMA queue is not empty.
1471  * application is expected to call QBUF before calling
1472  * this ioctl. If not, driver returns error
1473  */
1474 static int vpfe_streamon(struct file *file, void *priv,
1475                          enum v4l2_buf_type buf_type)
1476 {
1477         struct vpfe_device *vpfe_dev = video_drvdata(file);
1478         struct vpfe_fh *fh = file->private_data;
1479         struct vpfe_subdev_info *sdinfo;
1480         unsigned long addr;
1481         int ret = 0;
1482 
1483         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1484 
1485         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1486                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1487                 return -EINVAL;
1488         }
1489 
1490         /* If file handle is not allowed IO, return error */
1491         if (!fh->io_allowed) {
1492                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1493                 return -EACCES;
1494         }
1495 
1496         sdinfo = vpfe_dev->current_subdev;
1497         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1498                                         video, s_stream, 1);
1499 
1500         if (ret && (ret != -ENOIOCTLCMD)) {
1501                 v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1502                 return -EINVAL;
1503         }
1504 
1505         /* If buffer queue is empty, return error */
1506         if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1507                 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1508                 return -EIO;
1509         }
1510 
1511         /* Call videobuf_streamon to start streaming * in videobuf */
1512         ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1513         if (ret)
1514                 return ret;
1515 
1516 
1517         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1518         if (ret)
1519                 goto streamoff;
1520         /* Get the next frame from the buffer queue */
1521         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1522                                         struct videobuf_buffer, queue);
1523         vpfe_dev->cur_frm = vpfe_dev->next_frm;
1524         /* Remove buffer from the buffer queue */
1525         list_del(&vpfe_dev->cur_frm->queue);
1526         /* Mark state of the current frame to active */
1527         vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1528         /* Initialize field_id and started member */
1529         vpfe_dev->field_id = 0;
1530         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1531 
1532         /* Calculate field offset */
1533         vpfe_calculate_offsets(vpfe_dev);
1534 
1535         if (vpfe_attach_irq(vpfe_dev) < 0) {
1536                 v4l2_err(&vpfe_dev->v4l2_dev,
1537                          "Error in attaching interrupt handle\n");
1538                 ret = -EFAULT;
1539                 goto unlock_out;
1540         }
1541         if (ccdc_dev->hw_ops.configure() < 0) {
1542                 v4l2_err(&vpfe_dev->v4l2_dev,
1543                          "Error in configuring ccdc\n");
1544                 ret = -EINVAL;
1545                 goto unlock_out;
1546         }
1547         ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1548         vpfe_start_ccdc_capture(vpfe_dev);
1549         mutex_unlock(&vpfe_dev->lock);
1550         return ret;
1551 unlock_out:
1552         mutex_unlock(&vpfe_dev->lock);
1553 streamoff:
1554         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1555         return ret;
1556 }
1557 
1558 static int vpfe_streamoff(struct file *file, void *priv,
1559                           enum v4l2_buf_type buf_type)
1560 {
1561         struct vpfe_device *vpfe_dev = video_drvdata(file);
1562         struct vpfe_fh *fh = file->private_data;
1563         struct vpfe_subdev_info *sdinfo;
1564         int ret = 0;
1565 
1566         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1567 
1568         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1569                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1570                 return -EINVAL;
1571         }
1572 
1573         /* If io is allowed for this file handle, return error */
1574         if (!fh->io_allowed) {
1575                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1576                 return -EACCES;
1577         }
1578 
1579         /* If streaming is not started, return error */
1580         if (!vpfe_dev->started) {
1581                 v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1582                 return -EINVAL;
1583         }
1584 
1585         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1586         if (ret)
1587                 return ret;
1588 
1589         vpfe_stop_ccdc_capture(vpfe_dev);
1590         vpfe_detach_irq(vpfe_dev);
1591 
1592         sdinfo = vpfe_dev->current_subdev;
1593         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1594                                         video, s_stream, 0);
1595 
1596         if (ret && (ret != -ENOIOCTLCMD))
1597                 v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1598         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1599         mutex_unlock(&vpfe_dev->lock);
1600         return ret;
1601 }
1602 
1603 static int vpfe_cropcap(struct file *file, void *priv,
1604                               struct v4l2_cropcap *crop)
1605 {
1606         struct vpfe_device *vpfe_dev = video_drvdata(file);
1607 
1608         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
1609 
1610         if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1611                 return -EINVAL;
1612 
1613         memset(crop, 0, sizeof(struct v4l2_cropcap));
1614         crop->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1615         crop->bounds.width = crop->defrect.width =
1616                 vpfe_standards[vpfe_dev->std_index].width;
1617         crop->bounds.height = crop->defrect.height =
1618                 vpfe_standards[vpfe_dev->std_index].height;
1619         crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1620         return 0;
1621 }
1622 
1623 static int vpfe_g_crop(struct file *file, void *priv,
1624                              struct v4l2_crop *crop)
1625 {
1626         struct vpfe_device *vpfe_dev = video_drvdata(file);
1627 
1628         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_crop\n");
1629 
1630         crop->c = vpfe_dev->crop;
1631         return 0;
1632 }
1633 
1634 static int vpfe_s_crop(struct file *file, void *priv,
1635                              const struct v4l2_crop *crop)
1636 {
1637         struct vpfe_device *vpfe_dev = video_drvdata(file);
1638         struct v4l2_rect rect = crop->c;
1639         int ret = 0;
1640 
1641         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_crop\n");
1642 
1643         if (vpfe_dev->started) {
1644                 /* make sure streaming is not started */
1645                 v4l2_err(&vpfe_dev->v4l2_dev,
1646                         "Cannot change crop when streaming is ON\n");
1647                 return -EBUSY;
1648         }
1649 
1650         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1651         if (ret)
1652                 return ret;
1653 
1654         if (rect.top < 0 || rect.left < 0) {
1655                 v4l2_err(&vpfe_dev->v4l2_dev,
1656                         "doesn't support negative values for top & left\n");
1657                 ret = -EINVAL;
1658                 goto unlock_out;
1659         }
1660 
1661         /* adjust the width to 16 pixel boundary */
1662         rect.width = ((rect.width + 15) & ~0xf);
1663 
1664         /* make sure parameters are valid */
1665         if ((rect.left + rect.width >
1666                 vpfe_dev->std_info.active_pixels) ||
1667             (rect.top + rect.height >
1668                 vpfe_dev->std_info.active_lines)) {
1669                 v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_CROP params\n");
1670                 ret = -EINVAL;
1671                 goto unlock_out;
1672         }
1673         ccdc_dev->hw_ops.set_image_window(&rect);
1674         vpfe_dev->fmt.fmt.pix.width = rect.width;
1675         vpfe_dev->fmt.fmt.pix.height = rect.height;
1676         vpfe_dev->fmt.fmt.pix.bytesperline =
1677                 ccdc_dev->hw_ops.get_line_length();
1678         vpfe_dev->fmt.fmt.pix.sizeimage =
1679                 vpfe_dev->fmt.fmt.pix.bytesperline *
1680                 vpfe_dev->fmt.fmt.pix.height;
1681         vpfe_dev->crop = rect;
1682 unlock_out:
1683         mutex_unlock(&vpfe_dev->lock);
1684         return ret;
1685 }
1686 
1687 
1688 static long vpfe_param_handler(struct file *file, void *priv,
1689                 bool valid_prio, unsigned int cmd, void *param)
1690 {
1691         struct vpfe_device *vpfe_dev = video_drvdata(file);
1692         int ret = 0;
1693 
1694         v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
1695 
1696         if (vpfe_dev->started) {
1697                 /* only allowed if streaming is not started */
1698                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1699                         "device already started\n");
1700                 return -EBUSY;
1701         }
1702 
1703         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1704         if (ret)
1705                 return ret;
1706 
1707         switch (cmd) {
1708         case VPFE_CMD_S_CCDC_RAW_PARAMS:
1709                 v4l2_warn(&vpfe_dev->v4l2_dev,
1710                           "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
1711                 if (ccdc_dev->hw_ops.set_params) {
1712                         ret = ccdc_dev->hw_ops.set_params(param);
1713                         if (ret) {
1714                                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1715                                         "Error setting parameters in CCDC\n");
1716                                 goto unlock_out;
1717                         }
1718                         ret = vpfe_get_ccdc_image_format(vpfe_dev,
1719                                                          &vpfe_dev->fmt);
1720                         if (ret < 0) {
1721                                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1722                                         "Invalid image format at CCDC\n");
1723                                 goto unlock_out;
1724                         }
1725                 } else {
1726                         ret = -EINVAL;
1727                         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1728                                 "VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
1729                 }
1730                 break;
1731         default:
1732                 ret = -ENOTTY;
1733         }
1734 unlock_out:
1735         mutex_unlock(&vpfe_dev->lock);
1736         return ret;
1737 }
1738 
1739 
1740 /* vpfe capture ioctl operations */
1741 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1742         .vidioc_querycap         = vpfe_querycap,
1743         .vidioc_g_fmt_vid_cap    = vpfe_g_fmt_vid_cap,
1744         .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1745         .vidioc_s_fmt_vid_cap    = vpfe_s_fmt_vid_cap,
1746         .vidioc_try_fmt_vid_cap  = vpfe_try_fmt_vid_cap,
1747         .vidioc_enum_input       = vpfe_enum_input,
1748         .vidioc_g_input          = vpfe_g_input,
1749         .vidioc_s_input          = vpfe_s_input,
1750         .vidioc_querystd         = vpfe_querystd,
1751         .vidioc_s_std            = vpfe_s_std,
1752         .vidioc_g_std            = vpfe_g_std,
1753         .vidioc_reqbufs          = vpfe_reqbufs,
1754         .vidioc_querybuf         = vpfe_querybuf,
1755         .vidioc_qbuf             = vpfe_qbuf,
1756         .vidioc_dqbuf            = vpfe_dqbuf,
1757         .vidioc_streamon         = vpfe_streamon,
1758         .vidioc_streamoff        = vpfe_streamoff,
1759         .vidioc_cropcap          = vpfe_cropcap,
1760         .vidioc_g_crop           = vpfe_g_crop,
1761         .vidioc_s_crop           = vpfe_s_crop,
1762         .vidioc_default          = vpfe_param_handler,
1763 };
1764 
1765 static struct vpfe_device *vpfe_initialize(void)
1766 {
1767         struct vpfe_device *vpfe_dev;
1768 
1769         /* Default number of buffers should be 3 */
1770         if ((numbuffers > 0) &&
1771             (numbuffers < config_params.min_numbuffers))
1772                 numbuffers = config_params.min_numbuffers;
1773 
1774         /*
1775          * Set buffer size to min buffers size if invalid buffer size is
1776          * given
1777          */
1778         if (bufsize < config_params.min_bufsize)
1779                 bufsize = config_params.min_bufsize;
1780 
1781         config_params.numbuffers = numbuffers;
1782 
1783         if (numbuffers)
1784                 config_params.device_bufsize = bufsize;
1785 
1786         /* Allocate memory for device objects */
1787         vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1788 
1789         return vpfe_dev;
1790 }
1791 
1792 /*
1793  * vpfe_probe : This function creates device entries by register
1794  * itself to the V4L2 driver and initializes fields of each
1795  * device objects
1796  */
1797 static int vpfe_probe(struct platform_device *pdev)
1798 {
1799         struct vpfe_subdev_info *sdinfo;
1800         struct vpfe_config *vpfe_cfg;
1801         struct resource *res1;
1802         struct vpfe_device *vpfe_dev;
1803         struct i2c_adapter *i2c_adap;
1804         struct video_device *vfd;
1805         int ret = -ENOMEM, i, j;
1806         int num_subdevs = 0;
1807 
1808         /* Get the pointer to the device object */
1809         vpfe_dev = vpfe_initialize();
1810 
1811         if (!vpfe_dev) {
1812                 v4l2_err(pdev->dev.driver,
1813                         "Failed to allocate memory for vpfe_dev\n");
1814                 return ret;
1815         }
1816 
1817         vpfe_dev->pdev = &pdev->dev;
1818 
1819         if (NULL == pdev->dev.platform_data) {
1820                 v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1821                 ret = -ENODEV;
1822                 goto probe_free_dev_mem;
1823         }
1824 
1825         vpfe_cfg = pdev->dev.platform_data;
1826         vpfe_dev->cfg = vpfe_cfg;
1827         if (NULL == vpfe_cfg->ccdc ||
1828             NULL == vpfe_cfg->card_name ||
1829             NULL == vpfe_cfg->sub_devs) {
1830                 v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1831                 ret = -ENOENT;
1832                 goto probe_free_dev_mem;
1833         }
1834 
1835         /* Allocate memory for ccdc configuration */
1836         ccdc_cfg = kmalloc(sizeof(struct ccdc_config), GFP_KERNEL);
1837         if (NULL == ccdc_cfg) {
1838                 v4l2_err(pdev->dev.driver,
1839                          "Memory allocation failed for ccdc_cfg\n");
1840                 goto probe_free_dev_mem;
1841         }
1842 
1843         mutex_lock(&ccdc_lock);
1844 
1845         strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
1846         /* Get VINT0 irq resource */
1847         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1848         if (!res1) {
1849                 v4l2_err(pdev->dev.driver,
1850                          "Unable to get interrupt for VINT0\n");
1851                 ret = -ENODEV;
1852                 goto probe_free_ccdc_cfg_mem;
1853         }
1854         vpfe_dev->ccdc_irq0 = res1->start;
1855 
1856         /* Get VINT1 irq resource */
1857         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1858         if (!res1) {
1859                 v4l2_err(pdev->dev.driver,
1860                          "Unable to get interrupt for VINT1\n");
1861                 ret = -ENODEV;
1862                 goto probe_free_ccdc_cfg_mem;
1863         }
1864         vpfe_dev->ccdc_irq1 = res1->start;
1865 
1866         ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, 0,
1867                           "vpfe_capture0", vpfe_dev);
1868 
1869         if (0 != ret) {
1870                 v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1871                 goto probe_free_ccdc_cfg_mem;
1872         }
1873 
1874         /* Allocate memory for video device */
1875         vfd = video_device_alloc();
1876         if (NULL == vfd) {
1877                 ret = -ENOMEM;
1878                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
1879                 goto probe_out_release_irq;
1880         }
1881 
1882         /* Initialize field of video device */
1883         vfd->release            = video_device_release;
1884         vfd->fops               = &vpfe_fops;
1885         vfd->ioctl_ops          = &vpfe_ioctl_ops;
1886         vfd->tvnorms            = 0;
1887         vfd->v4l2_dev           = &vpfe_dev->v4l2_dev;
1888         snprintf(vfd->name, sizeof(vfd->name),
1889                  "%s_V%d.%d.%d",
1890                  CAPTURE_DRV_NAME,
1891                  (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1892                  (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1893                  (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1894         /* Set video_dev to the video device */
1895         vpfe_dev->video_dev     = vfd;
1896 
1897         ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1898         if (ret) {
1899                 v4l2_err(pdev->dev.driver,
1900                         "Unable to register v4l2 device.\n");
1901                 goto probe_out_video_release;
1902         }
1903         v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1904         spin_lock_init(&vpfe_dev->irqlock);
1905         spin_lock_init(&vpfe_dev->dma_queue_lock);
1906         mutex_init(&vpfe_dev->lock);
1907 
1908         /* Initialize field of the device objects */
1909         vpfe_dev->numbuffers = config_params.numbuffers;
1910 
1911         /* register video device */
1912         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1913                 "trying to register vpfe device.\n");
1914         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1915                 "video_dev=%p\n", &vpfe_dev->video_dev);
1916         vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1917         ret = video_register_device(vpfe_dev->video_dev,
1918                                     VFL_TYPE_GRABBER, -1);
1919 
1920         if (ret) {
1921                 v4l2_err(pdev->dev.driver,
1922                         "Unable to register video device.\n");
1923                 goto probe_out_v4l2_unregister;
1924         }
1925 
1926         v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1927         /* set the driver data in platform device */
1928         platform_set_drvdata(pdev, vpfe_dev);
1929         /* set driver private data */
1930         video_set_drvdata(vpfe_dev->video_dev, vpfe_dev);
1931         i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
1932         num_subdevs = vpfe_cfg->num_subdevs;
1933         vpfe_dev->sd = kmalloc(sizeof(struct v4l2_subdev *) * num_subdevs,
1934                                 GFP_KERNEL);
1935         if (NULL == vpfe_dev->sd) {
1936                 v4l2_err(&vpfe_dev->v4l2_dev,
1937                         "unable to allocate memory for subdevice pointers\n");
1938                 ret = -ENOMEM;
1939                 goto probe_out_video_unregister;
1940         }
1941 
1942         for (i = 0; i < num_subdevs; i++) {
1943                 struct v4l2_input *inps;
1944 
1945                 sdinfo = &vpfe_cfg->sub_devs[i];
1946 
1947                 /* Load up the subdevice */
1948                 vpfe_dev->sd[i] =
1949                         v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
1950                                                   i2c_adap,
1951                                                   &sdinfo->board_info,
1952                                                   NULL);
1953                 if (vpfe_dev->sd[i]) {
1954                         v4l2_info(&vpfe_dev->v4l2_dev,
1955                                   "v4l2 sub device %s registered\n",
1956                                   sdinfo->name);
1957                         vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
1958                         /* update tvnorms from the sub devices */
1959                         for (j = 0; j < sdinfo->num_inputs; j++) {
1960                                 inps = &sdinfo->inputs[j];
1961                                 vfd->tvnorms |= inps->std;
1962                         }
1963                 } else {
1964                         v4l2_info(&vpfe_dev->v4l2_dev,
1965                                   "v4l2 sub device %s register fails\n",
1966                                   sdinfo->name);
1967                         goto probe_sd_out;
1968                 }
1969         }
1970 
1971         /* set first sub device as current one */
1972         vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
1973         vpfe_dev->v4l2_dev.ctrl_handler = vpfe_dev->sd[0]->ctrl_handler;
1974 
1975         /* We have at least one sub device to work with */
1976         mutex_unlock(&ccdc_lock);
1977         return 0;
1978 
1979 probe_sd_out:
1980         kfree(vpfe_dev->sd);
1981 probe_out_video_unregister:
1982         video_unregister_device(vpfe_dev->video_dev);
1983 probe_out_v4l2_unregister:
1984         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1985 probe_out_video_release:
1986         if (!video_is_registered(vpfe_dev->video_dev))
1987                 video_device_release(vpfe_dev->video_dev);
1988 probe_out_release_irq:
1989         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1990 probe_free_ccdc_cfg_mem:
1991         kfree(ccdc_cfg);
1992         mutex_unlock(&ccdc_lock);
1993 probe_free_dev_mem:
1994         kfree(vpfe_dev);
1995         return ret;
1996 }
1997 
1998 /*
1999  * vpfe_remove : It un-register device from V4L2 driver
2000  */
2001 static int vpfe_remove(struct platform_device *pdev)
2002 {
2003         struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
2004 
2005         v4l2_info(pdev->dev.driver, "vpfe_remove\n");
2006 
2007         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2008         kfree(vpfe_dev->sd);
2009         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2010         video_unregister_device(vpfe_dev->video_dev);
2011         kfree(vpfe_dev);
2012         kfree(ccdc_cfg);
2013         return 0;
2014 }
2015 
2016 static int vpfe_suspend(struct device *dev)
2017 {
2018         return 0;
2019 }
2020 
2021 static int vpfe_resume(struct device *dev)
2022 {
2023         return 0;
2024 }
2025 
2026 static const struct dev_pm_ops vpfe_dev_pm_ops = {
2027         .suspend = vpfe_suspend,
2028         .resume = vpfe_resume,
2029 };
2030 
2031 static struct platform_driver vpfe_driver = {
2032         .driver = {
2033                 .name = CAPTURE_DRV_NAME,
2034                 .owner = THIS_MODULE,
2035                 .pm = &vpfe_dev_pm_ops,
2036         },
2037         .probe = vpfe_probe,
2038         .remove = vpfe_remove,
2039 };
2040 
2041 module_platform_driver(vpfe_driver);
2042 

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