Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 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

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 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         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 
452 static 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 
489 unlock:
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  */
498 static int vpfe_open(struct file *file)
499 {
500         struct vpfe_device *vpfe_dev = video_drvdata(file);
501         struct video_device *vdev = video_devdata(file);
502         struct vpfe_fh *fh;
503 
504         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
505 
506         if (!vpfe_dev->cfg->num_subdevs) {
507                 v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
508                 return -ENODEV;
509         }
510 
511         /* Allocate memory for the file handle object */
512         fh = kmalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
513         if (NULL == fh) {
514                 v4l2_err(&vpfe_dev->v4l2_dev,
515                         "unable to allocate memory for file handle object\n");
516                 return -ENOMEM;
517         }
518         /* store pointer to fh in private_data member of file */
519         file->private_data = fh;
520         fh->vpfe_dev = vpfe_dev;
521         v4l2_fh_init(&fh->fh, vdev);
522         mutex_lock(&vpfe_dev->lock);
523         /* If decoder is not initialized. initialize it */
524         if (!vpfe_dev->initialized) {
525                 if (vpfe_initialize_device(vpfe_dev)) {
526                         mutex_unlock(&vpfe_dev->lock);
527                         return -ENODEV;
528                 }
529         }
530         /* Increment device usrs counter */
531         vpfe_dev->usrs++;
532         /* Set io_allowed member to false */
533         fh->io_allowed = 0;
534         v4l2_fh_add(&fh->fh);
535         mutex_unlock(&vpfe_dev->lock);
536         return 0;
537 }
538 
539 static 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 
552 static 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 
561 static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
562 {
563         v4l2_get_timestamp(&vpfe_dev->cur_frm->ts);
564         vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
565         vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
566         wake_up_interruptible(&vpfe_dev->cur_frm->done);
567         vpfe_dev->cur_frm = vpfe_dev->next_frm;
568 }
569 
570 /* ISR for VINT0*/
571 static irqreturn_t vpfe_isr(int irq, void *dev_id)
572 {
573         struct vpfe_device *vpfe_dev = dev_id;
574         enum v4l2_field field;
575         int fid;
576 
577         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
578         field = vpfe_dev->fmt.fmt.pix.field;
579 
580         /* if streaming not started, don't do anything */
581         if (!vpfe_dev->started)
582                 goto clear_intr;
583 
584         /* only for 6446 this will be applicable */
585         if (NULL != ccdc_dev->hw_ops.reset)
586                 ccdc_dev->hw_ops.reset();
587 
588         if (field == V4L2_FIELD_NONE) {
589                 /* handle progressive frame capture */
590                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
591                         "frame format is progressive...\n");
592                 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
593                         vpfe_process_buffer_complete(vpfe_dev);
594                 goto clear_intr;
595         }
596 
597         /* interlaced or TB capture check which field we are in hardware */
598         fid = ccdc_dev->hw_ops.getfid();
599 
600         /* switch the software maintained field id */
601         vpfe_dev->field_id ^= 1;
602         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
603                 fid, vpfe_dev->field_id);
604         if (fid == vpfe_dev->field_id) {
605                 /* we are in-sync here,continue */
606                 if (fid == 0) {
607                         /*
608                          * One frame is just being captured. If the next frame
609                          * is available, release the current frame and move on
610                          */
611                         if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
612                                 vpfe_process_buffer_complete(vpfe_dev);
613                         /*
614                          * based on whether the two fields are stored
615                          * interleavely or separately in memory, reconfigure
616                          * the CCDC memory address
617                          */
618                         if (field == V4L2_FIELD_SEQ_TB) {
619                                 vpfe_schedule_bottom_field(vpfe_dev);
620                         }
621                         goto clear_intr;
622                 }
623                 /*
624                  * if one field is just being captured configure
625                  * the next frame get the next frame from the empty
626                  * queue if no frame is available hold on to the
627                  * current buffer
628                  */
629                 spin_lock(&vpfe_dev->dma_queue_lock);
630                 if (!list_empty(&vpfe_dev->dma_queue) &&
631                     vpfe_dev->cur_frm == vpfe_dev->next_frm)
632                         vpfe_schedule_next_buffer(vpfe_dev);
633                 spin_unlock(&vpfe_dev->dma_queue_lock);
634         } else if (fid == 0) {
635                 /*
636                  * out of sync. Recover from any hardware out-of-sync.
637                  * May loose one frame
638                  */
639                 vpfe_dev->field_id = fid;
640         }
641 clear_intr:
642         if (vpfe_dev->cfg->clr_intr)
643                 vpfe_dev->cfg->clr_intr(irq);
644 
645         return IRQ_HANDLED;
646 }
647 
648 /* vdint1_isr - isr handler for VINT1 interrupt */
649 static irqreturn_t vdint1_isr(int irq, void *dev_id)
650 {
651         struct vpfe_device *vpfe_dev = dev_id;
652 
653         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
654 
655         /* if streaming not started, don't do anything */
656         if (!vpfe_dev->started) {
657                 if (vpfe_dev->cfg->clr_intr)
658                         vpfe_dev->cfg->clr_intr(irq);
659                 return IRQ_HANDLED;
660         }
661 
662         spin_lock(&vpfe_dev->dma_queue_lock);
663         if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
664             !list_empty(&vpfe_dev->dma_queue) &&
665             vpfe_dev->cur_frm == vpfe_dev->next_frm)
666                 vpfe_schedule_next_buffer(vpfe_dev);
667         spin_unlock(&vpfe_dev->dma_queue_lock);
668 
669         if (vpfe_dev->cfg->clr_intr)
670                 vpfe_dev->cfg->clr_intr(irq);
671 
672         return IRQ_HANDLED;
673 }
674 
675 static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
676 {
677         enum ccdc_frmfmt frame_format;
678 
679         frame_format = ccdc_dev->hw_ops.get_frame_format();
680         if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
681                 free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
682 }
683 
684 static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
685 {
686         enum ccdc_frmfmt frame_format;
687 
688         frame_format = ccdc_dev->hw_ops.get_frame_format();
689         if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
690                 return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
691                                     0, "vpfe_capture1",
692                                     vpfe_dev);
693         }
694         return 0;
695 }
696 
697 /* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
698 static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
699 {
700         vpfe_dev->started = 0;
701         ccdc_dev->hw_ops.enable(0);
702         if (ccdc_dev->hw_ops.enable_out_to_sdram)
703                 ccdc_dev->hw_ops.enable_out_to_sdram(0);
704 }
705 
706 /*
707  * vpfe_release : This function deletes buffer queue, frees the
708  * buffers and the vpfe file  handle
709  */
710 static int vpfe_release(struct file *file)
711 {
712         struct vpfe_device *vpfe_dev = video_drvdata(file);
713         struct vpfe_fh *fh = file->private_data;
714         struct vpfe_subdev_info *sdinfo;
715         int ret;
716 
717         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
718 
719         /* Get the device lock */
720         mutex_lock(&vpfe_dev->lock);
721         /* if this instance is doing IO */
722         if (fh->io_allowed) {
723                 if (vpfe_dev->started) {
724                         sdinfo = vpfe_dev->current_subdev;
725                         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
726                                                          sdinfo->grp_id,
727                                                          video, s_stream, 0);
728                         if (ret && (ret != -ENOIOCTLCMD))
729                                 v4l2_err(&vpfe_dev->v4l2_dev,
730                                 "stream off failed in subdev\n");
731                         vpfe_stop_ccdc_capture(vpfe_dev);
732                         vpfe_detach_irq(vpfe_dev);
733                         videobuf_streamoff(&vpfe_dev->buffer_queue);
734                 }
735                 vpfe_dev->io_usrs = 0;
736                 vpfe_dev->numbuffers = config_params.numbuffers;
737                 videobuf_stop(&vpfe_dev->buffer_queue);
738                 videobuf_mmap_free(&vpfe_dev->buffer_queue);
739         }
740 
741         /* Decrement device usrs counter */
742         vpfe_dev->usrs--;
743         v4l2_fh_del(&fh->fh);
744         v4l2_fh_exit(&fh->fh);
745         /* If this is the last file handle */
746         if (!vpfe_dev->usrs) {
747                 vpfe_dev->initialized = 0;
748                 if (ccdc_dev->hw_ops.close)
749                         ccdc_dev->hw_ops.close(vpfe_dev->pdev);
750                 module_put(ccdc_dev->owner);
751         }
752         mutex_unlock(&vpfe_dev->lock);
753         file->private_data = NULL;
754         /* Free memory allocated to file handle object */
755         kfree(fh);
756         return 0;
757 }
758 
759 /*
760  * vpfe_mmap : It is used to map kernel space buffers
761  * into user spaces
762  */
763 static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
764 {
765         /* Get the device object and file handle object */
766         struct vpfe_device *vpfe_dev = video_drvdata(file);
767 
768         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
769 
770         return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
771 }
772 
773 /*
774  * vpfe_poll: It is used for select/poll system call
775  */
776 static unsigned int vpfe_poll(struct file *file, poll_table *wait)
777 {
778         struct vpfe_device *vpfe_dev = video_drvdata(file);
779 
780         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
781 
782         if (vpfe_dev->started)
783                 return videobuf_poll_stream(file,
784                                             &vpfe_dev->buffer_queue, wait);
785         return 0;
786 }
787 
788 /* vpfe capture driver file operations */
789 static const struct v4l2_file_operations vpfe_fops = {
790         .owner = THIS_MODULE,
791         .open = vpfe_open,
792         .release = vpfe_release,
793         .unlocked_ioctl = video_ioctl2,
794         .mmap = vpfe_mmap,
795         .poll = vpfe_poll
796 };
797 
798 /*
799  * vpfe_check_format()
800  * This function adjust the input pixel format as per hardware
801  * capabilities and update the same in pixfmt.
802  * Following algorithm used :-
803  *
804  *      If given pixformat is not in the vpfe list of pix formats or not
805  *      supported by the hardware, current value of pixformat in the device
806  *      is used
807  *      If given field is not supported, then current field is used. If field
808  *      is different from current, then it is matched with that from sub device.
809  *      Minimum height is 2 lines for interlaced or tb field and 1 line for
810  *      progressive. Maximum height is clamped to active active lines of scan
811  *      Minimum width is 32 bytes in memory and width is clamped to active
812  *      pixels of scan.
813  *      bytesperline is a multiple of 32.
814  */
815 static const struct vpfe_pixel_format *
816         vpfe_check_format(struct vpfe_device *vpfe_dev,
817                           struct v4l2_pix_format *pixfmt)
818 {
819         u32 min_height = 1, min_width = 32, max_width, max_height;
820         const struct vpfe_pixel_format *vpfe_pix_fmt;
821         u32 pix;
822         int temp, found;
823 
824         vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
825         if (NULL == vpfe_pix_fmt) {
826                 /*
827                  * use current pixel format in the vpfe device. We
828                  * will find this pix format in the table
829                  */
830                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
831                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
832         }
833 
834         /* check if hw supports it */
835         temp = 0;
836         found = 0;
837         while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
838                 if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
839                         found = 1;
840                         break;
841                 }
842                 temp++;
843         }
844 
845         if (!found) {
846                 /* use current pixel format */
847                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
848                 /*
849                  * Since this is currently used in the vpfe device, we
850                  * will find this pix format in the table
851                  */
852                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
853         }
854 
855         /* check what field format is supported */
856         if (pixfmt->field == V4L2_FIELD_ANY) {
857                 /* if field is any, use current value as default */
858                 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
859         }
860 
861         /*
862          * if field is not same as current field in the vpfe device
863          * try matching the field with the sub device field
864          */
865         if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
866                 /*
867                  * If field value is not in the supported fields, use current
868                  * field used in the device as default
869                  */
870                 switch (pixfmt->field) {
871                 case V4L2_FIELD_INTERLACED:
872                 case V4L2_FIELD_SEQ_TB:
873                         /* if sub device is supporting progressive, use that */
874                         if (!vpfe_dev->std_info.frame_format)
875                                 pixfmt->field = V4L2_FIELD_NONE;
876                         break;
877                 case V4L2_FIELD_NONE:
878                         if (vpfe_dev->std_info.frame_format)
879                                 pixfmt->field = V4L2_FIELD_INTERLACED;
880                         break;
881 
882                 default:
883                         /* use current field as default */
884                         pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
885                         break;
886                 }
887         }
888 
889         /* Now adjust image resolutions supported */
890         if (pixfmt->field == V4L2_FIELD_INTERLACED ||
891             pixfmt->field == V4L2_FIELD_SEQ_TB)
892                 min_height = 2;
893 
894         max_width = vpfe_dev->std_info.active_pixels;
895         max_height = vpfe_dev->std_info.active_lines;
896         min_width /= vpfe_pix_fmt->bpp;
897 
898         v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
899                   pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
900 
901         pixfmt->width = clamp((pixfmt->width), min_width, max_width);
902         pixfmt->height = clamp((pixfmt->height), min_height, max_height);
903 
904         /* If interlaced, adjust height to be a multiple of 2 */
905         if (pixfmt->field == V4L2_FIELD_INTERLACED)
906                 pixfmt->height &= (~1);
907         /*
908          * recalculate bytesperline and sizeimage since width
909          * and height might have changed
910          */
911         pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
912                                 & ~31);
913         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
914                 pixfmt->sizeimage =
915                         pixfmt->bytesperline * pixfmt->height +
916                         ((pixfmt->bytesperline * pixfmt->height) >> 1);
917         else
918                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
919 
920         v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height ="
921                  " %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
922                  pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
923                  pixfmt->bytesperline, pixfmt->sizeimage);
924         return vpfe_pix_fmt;
925 }
926 
927 static int vpfe_querycap(struct file *file, void  *priv,
928                                struct v4l2_capability *cap)
929 {
930         struct vpfe_device *vpfe_dev = video_drvdata(file);
931 
932         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
933 
934         cap->version = VPFE_CAPTURE_VERSION_CODE;
935         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
936         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
937         strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
938         strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
939         return 0;
940 }
941 
942 static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
943                                 struct v4l2_format *fmt)
944 {
945         struct vpfe_device *vpfe_dev = video_drvdata(file);
946         int ret = 0;
947 
948         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
949         /* Fill in the information about format */
950         *fmt = vpfe_dev->fmt;
951         return ret;
952 }
953 
954 static int vpfe_enum_fmt_vid_cap(struct file *file, void  *priv,
955                                    struct v4l2_fmtdesc *fmt)
956 {
957         struct vpfe_device *vpfe_dev = video_drvdata(file);
958         const struct vpfe_pixel_format *pix_fmt;
959         int temp_index;
960         u32 pix;
961 
962         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
963 
964         if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
965                 return -EINVAL;
966 
967         /* Fill in the information about format */
968         pix_fmt = vpfe_lookup_pix_format(pix);
969         if (NULL != pix_fmt) {
970                 temp_index = fmt->index;
971                 *fmt = pix_fmt->fmtdesc;
972                 fmt->index = temp_index;
973                 return 0;
974         }
975         return -EINVAL;
976 }
977 
978 static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
979                                 struct v4l2_format *fmt)
980 {
981         struct vpfe_device *vpfe_dev = video_drvdata(file);
982         const struct vpfe_pixel_format *pix_fmts;
983         int ret = 0;
984 
985         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
986 
987         /* If streaming is started, return error */
988         if (vpfe_dev->started) {
989                 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
990                 return -EBUSY;
991         }
992 
993         /* Check for valid frame format */
994         pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
995 
996         if (NULL == pix_fmts)
997                 return -EINVAL;
998 
999         /* store the pixel format in the device  object */
1000         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1001         if (ret)
1002                 return ret;
1003 
1004         /* First detach any IRQ if currently attached */
1005         vpfe_detach_irq(vpfe_dev);
1006         vpfe_dev->fmt = *fmt;
1007         /* set image capture parameters in the ccdc */
1008         ret = vpfe_config_ccdc_image_format(vpfe_dev);
1009         mutex_unlock(&vpfe_dev->lock);
1010         return ret;
1011 }
1012 
1013 static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
1014                                   struct v4l2_format *f)
1015 {
1016         struct vpfe_device *vpfe_dev = video_drvdata(file);
1017         const struct vpfe_pixel_format *pix_fmts;
1018 
1019         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
1020 
1021         pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
1022         if (NULL == pix_fmts)
1023                 return -EINVAL;
1024         return 0;
1025 }
1026 
1027 /*
1028  * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1029  * given app input index
1030  */
1031 static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
1032                                         int *subdev_index,
1033                                         int *subdev_input_index,
1034                                         int app_input_index)
1035 {
1036         struct vpfe_config *cfg = vpfe_dev->cfg;
1037         struct vpfe_subdev_info *sdinfo;
1038         int i, j = 0;
1039 
1040         for (i = 0; i < cfg->num_subdevs; i++) {
1041                 sdinfo = &cfg->sub_devs[i];
1042                 if (app_input_index < (j + sdinfo->num_inputs)) {
1043                         *subdev_index = i;
1044                         *subdev_input_index = app_input_index - j;
1045                         return 0;
1046                 }
1047                 j += sdinfo->num_inputs;
1048         }
1049         return -EINVAL;
1050 }
1051 
1052 /*
1053  * vpfe_get_app_input - Get app input index for a given subdev input index
1054  * driver stores the input index of the current sub device and translate it
1055  * when application request the current input
1056  */
1057 static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
1058                                     int *app_input_index)
1059 {
1060         struct vpfe_config *cfg = vpfe_dev->cfg;
1061         struct vpfe_subdev_info *sdinfo;
1062         int i, j = 0;
1063 
1064         for (i = 0; i < cfg->num_subdevs; i++) {
1065                 sdinfo = &cfg->sub_devs[i];
1066                 if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
1067                         if (vpfe_dev->current_input >= sdinfo->num_inputs)
1068                                 return -1;
1069                         *app_input_index = j + vpfe_dev->current_input;
1070                         return 0;
1071                 }
1072                 j += sdinfo->num_inputs;
1073         }
1074         return -EINVAL;
1075 }
1076 
1077 static int vpfe_enum_input(struct file *file, void *priv,
1078                                  struct v4l2_input *inp)
1079 {
1080         struct vpfe_device *vpfe_dev = video_drvdata(file);
1081         struct vpfe_subdev_info *sdinfo;
1082         int subdev, index ;
1083 
1084         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
1085 
1086         if (vpfe_get_subdev_input_index(vpfe_dev,
1087                                         &subdev,
1088                                         &index,
1089                                         inp->index) < 0) {
1090                 v4l2_err(&vpfe_dev->v4l2_dev, "input information not found"
1091                          " for the subdev\n");
1092                 return -EINVAL;
1093         }
1094         sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1095         memcpy(inp, &sdinfo->inputs[index], sizeof(struct v4l2_input));
1096         return 0;
1097 }
1098 
1099 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1100 {
1101         struct vpfe_device *vpfe_dev = video_drvdata(file);
1102 
1103         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1104 
1105         return vpfe_get_app_input_index(vpfe_dev, index);
1106 }
1107 
1108 
1109 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1110 {
1111         struct vpfe_device *vpfe_dev = video_drvdata(file);
1112         struct v4l2_subdev *sd;
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         ret = vpfe_get_subdev_input_index(vpfe_dev,
1135                                           &subdev_index,
1136                                           &inp_index,
1137                                           index);
1138         if (ret < 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         sd = vpfe_dev->sd[subdev_index];
1145         route = &sdinfo->routes[inp_index];
1146         if (route && sdinfo->can_route) {
1147                 input = route->input;
1148                 output = route->output;
1149         }
1150 
1151         if (sd)
1152                 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1153 
1154         if (ret) {
1155                 v4l2_err(&vpfe_dev->v4l2_dev,
1156                         "vpfe_doioctl:error in setting input in decoder\n");
1157                 ret = -EINVAL;
1158                 goto unlock_out;
1159         }
1160         vpfe_dev->current_subdev = sdinfo;
1161         if (sd)
1162                 vpfe_dev->v4l2_dev.ctrl_handler = sd->ctrl_handler;
1163         vpfe_dev->current_input = index;
1164         vpfe_dev->std_index = 0;
1165 
1166         /* set the bus/interface parameter for the sub device in ccdc */
1167         ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1168         if (ret)
1169                 goto unlock_out;
1170 
1171         /* set the default image parameters in the device */
1172         ret = vpfe_config_image_format(vpfe_dev,
1173                                 vpfe_standards[vpfe_dev->std_index].std_id);
1174 unlock_out:
1175         mutex_unlock(&vpfe_dev->lock);
1176         return ret;
1177 }
1178 
1179 static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1180 {
1181         struct vpfe_device *vpfe_dev = video_drvdata(file);
1182         struct vpfe_subdev_info *sdinfo;
1183         int ret = 0;
1184 
1185         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1186 
1187         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1188         sdinfo = vpfe_dev->current_subdev;
1189         if (ret)
1190                 return ret;
1191         /* Call querystd function of decoder device */
1192         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1193                                          video, querystd, std_id);
1194         mutex_unlock(&vpfe_dev->lock);
1195         return ret;
1196 }
1197 
1198 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1199 {
1200         struct vpfe_device *vpfe_dev = video_drvdata(file);
1201         struct vpfe_subdev_info *sdinfo;
1202         int ret = 0;
1203 
1204         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1205 
1206         /* Call decoder driver function to set the standard */
1207         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1208         if (ret)
1209                 return ret;
1210 
1211         sdinfo = vpfe_dev->current_subdev;
1212         /* If streaming is started, return device busy error */
1213         if (vpfe_dev->started) {
1214                 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1215                 ret = -EBUSY;
1216                 goto unlock_out;
1217         }
1218 
1219         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1220                                          video, s_std, std_id);
1221         if (ret < 0) {
1222                 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1223                 goto unlock_out;
1224         }
1225         ret = vpfe_config_image_format(vpfe_dev, std_id);
1226 
1227 unlock_out:
1228         mutex_unlock(&vpfe_dev->lock);
1229         return ret;
1230 }
1231 
1232 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1233 {
1234         struct vpfe_device *vpfe_dev = video_drvdata(file);
1235 
1236         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1237 
1238         *std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1239         return 0;
1240 }
1241 /*
1242  *  Videobuf operations
1243  */
1244 static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1245                                 unsigned int *count,
1246                                 unsigned int *size)
1247 {
1248         struct vpfe_fh *fh = vq->priv_data;
1249         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1250 
1251         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1252         *size = vpfe_dev->fmt.fmt.pix.sizeimage;
1253         if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
1254                 vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
1255                 *size = config_params.device_bufsize;
1256 
1257         if (*count < config_params.min_numbuffers)
1258                 *count = config_params.min_numbuffers;
1259         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1260                 "count=%d, size=%d\n", *count, *size);
1261         return 0;
1262 }
1263 
1264 static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1265                                 struct videobuf_buffer *vb,
1266                                 enum v4l2_field field)
1267 {
1268         struct vpfe_fh *fh = vq->priv_data;
1269         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1270         unsigned long addr;
1271         int ret;
1272 
1273         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1274 
1275         /* If buffer is not initialized, initialize it */
1276         if (VIDEOBUF_NEEDS_INIT == vb->state) {
1277                 vb->width = vpfe_dev->fmt.fmt.pix.width;
1278                 vb->height = vpfe_dev->fmt.fmt.pix.height;
1279                 vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1280                 vb->field = field;
1281 
1282                 ret = videobuf_iolock(vq, vb, NULL);
1283                 if (ret < 0)
1284                         return ret;
1285 
1286                 addr = videobuf_to_dma_contig(vb);
1287                 /* Make sure user addresses are aligned to 32 bytes */
1288                 if (!ALIGN(addr, 32))
1289                         return -EINVAL;
1290 
1291                 vb->state = VIDEOBUF_PREPARED;
1292         }
1293         return 0;
1294 }
1295 
1296 static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1297                                 struct videobuf_buffer *vb)
1298 {
1299         /* Get the file handle object and device object */
1300         struct vpfe_fh *fh = vq->priv_data;
1301         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1302         unsigned long flags;
1303 
1304         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1305 
1306         /* add the buffer to the DMA queue */
1307         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1308         list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1309         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1310 
1311         /* Change state of the buffer */
1312         vb->state = VIDEOBUF_QUEUED;
1313 }
1314 
1315 static void vpfe_videobuf_release(struct videobuf_queue *vq,
1316                                   struct videobuf_buffer *vb)
1317 {
1318         struct vpfe_fh *fh = vq->priv_data;
1319         struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1320         unsigned long flags;
1321 
1322         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1323 
1324         /*
1325          * We need to flush the buffer from the dma queue since
1326          * they are de-allocated
1327          */
1328         spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1329         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1330         spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1331         videobuf_dma_contig_free(vq, vb);
1332         vb->state = VIDEOBUF_NEEDS_INIT;
1333 }
1334 
1335 static struct videobuf_queue_ops vpfe_videobuf_qops = {
1336         .buf_setup      = vpfe_videobuf_setup,
1337         .buf_prepare    = vpfe_videobuf_prepare,
1338         .buf_queue      = vpfe_videobuf_queue,
1339         .buf_release    = vpfe_videobuf_release,
1340 };
1341 
1342 /*
1343  * vpfe_reqbufs. currently support REQBUF only once opening
1344  * the device.
1345  */
1346 static int vpfe_reqbufs(struct file *file, void *priv,
1347                         struct v4l2_requestbuffers *req_buf)
1348 {
1349         struct vpfe_device *vpfe_dev = video_drvdata(file);
1350         struct vpfe_fh *fh = file->private_data;
1351         int ret = 0;
1352 
1353         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1354 
1355         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1356                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1357                 return -EINVAL;
1358         }
1359 
1360         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1361         if (ret)
1362                 return ret;
1363 
1364         if (vpfe_dev->io_usrs != 0) {
1365                 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1366                 ret = -EBUSY;
1367                 goto unlock_out;
1368         }
1369 
1370         vpfe_dev->memory = req_buf->memory;
1371         videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1372                                 &vpfe_videobuf_qops,
1373                                 vpfe_dev->pdev,
1374                                 &vpfe_dev->irqlock,
1375                                 req_buf->type,
1376                                 vpfe_dev->fmt.fmt.pix.field,
1377                                 sizeof(struct videobuf_buffer),
1378                                 fh, NULL);
1379 
1380         fh->io_allowed = 1;
1381         vpfe_dev->io_usrs = 1;
1382         INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1383         ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1384 unlock_out:
1385         mutex_unlock(&vpfe_dev->lock);
1386         return ret;
1387 }
1388 
1389 static int vpfe_querybuf(struct file *file, void *priv,
1390                          struct v4l2_buffer *buf)
1391 {
1392         struct vpfe_device *vpfe_dev = video_drvdata(file);
1393 
1394         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1395 
1396         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1397                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1398                 return  -EINVAL;
1399         }
1400 
1401         if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1402                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1403                 return -EINVAL;
1404         }
1405         /* Call videobuf_querybuf to get information */
1406         return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1407 }
1408 
1409 static int vpfe_qbuf(struct file *file, void *priv,
1410                      struct v4l2_buffer *p)
1411 {
1412         struct vpfe_device *vpfe_dev = video_drvdata(file);
1413         struct vpfe_fh *fh = file->private_data;
1414 
1415         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1416 
1417         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1418                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1419                 return -EINVAL;
1420         }
1421 
1422         /*
1423          * If this file handle is not allowed to do IO,
1424          * return error
1425          */
1426         if (!fh->io_allowed) {
1427                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1428                 return -EACCES;
1429         }
1430         return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1431 }
1432 
1433 static int vpfe_dqbuf(struct file *file, void *priv,
1434                       struct v4l2_buffer *buf)
1435 {
1436         struct vpfe_device *vpfe_dev = video_drvdata(file);
1437 
1438         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1439 
1440         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1441                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1442                 return -EINVAL;
1443         }
1444         return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1445                                       buf, file->f_flags & O_NONBLOCK);
1446 }
1447 
1448 /*
1449  * vpfe_calculate_offsets : This function calculates buffers offset
1450  * for top and bottom field
1451  */
1452 static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1453 {
1454         struct v4l2_rect image_win;
1455 
1456         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1457 
1458         ccdc_dev->hw_ops.get_image_window(&image_win);
1459         vpfe_dev->field_off = image_win.height * image_win.width;
1460 }
1461 
1462 /* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1463 static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1464 {
1465         ccdc_dev->hw_ops.enable(1);
1466         if (ccdc_dev->hw_ops.enable_out_to_sdram)
1467                 ccdc_dev->hw_ops.enable_out_to_sdram(1);
1468         vpfe_dev->started = 1;
1469 }
1470 
1471 /*
1472  * vpfe_streamon. Assume the DMA queue is not empty.
1473  * application is expected to call QBUF before calling
1474  * this ioctl. If not, driver returns error
1475  */
1476 static int vpfe_streamon(struct file *file, void *priv,
1477                          enum v4l2_buf_type buf_type)
1478 {
1479         struct vpfe_device *vpfe_dev = video_drvdata(file);
1480         struct vpfe_fh *fh = file->private_data;
1481         struct vpfe_subdev_info *sdinfo;
1482         unsigned long addr;
1483         int ret = 0;
1484 
1485         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1486 
1487         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1488                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1489                 return -EINVAL;
1490         }
1491 
1492         /* If file handle is not allowed IO, return error */
1493         if (!fh->io_allowed) {
1494                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1495                 return -EACCES;
1496         }
1497 
1498         sdinfo = vpfe_dev->current_subdev;
1499         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1500                                         video, s_stream, 1);
1501 
1502         if (ret && (ret != -ENOIOCTLCMD)) {
1503                 v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1504                 return -EINVAL;
1505         }
1506 
1507         /* If buffer queue is empty, return error */
1508         if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1509                 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1510                 return -EIO;
1511         }
1512 
1513         /* Call videobuf_streamon to start streaming * in videobuf */
1514         ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1515         if (ret)
1516                 return ret;
1517 
1518 
1519         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1520         if (ret)
1521                 goto streamoff;
1522         /* Get the next frame from the buffer queue */
1523         vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1524                                         struct videobuf_buffer, queue);
1525         vpfe_dev->cur_frm = vpfe_dev->next_frm;
1526         /* Remove buffer from the buffer queue */
1527         list_del(&vpfe_dev->cur_frm->queue);
1528         /* Mark state of the current frame to active */
1529         vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1530         /* Initialize field_id and started member */
1531         vpfe_dev->field_id = 0;
1532         addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1533 
1534         /* Calculate field offset */
1535         vpfe_calculate_offsets(vpfe_dev);
1536 
1537         if (vpfe_attach_irq(vpfe_dev) < 0) {
1538                 v4l2_err(&vpfe_dev->v4l2_dev,
1539                          "Error in attaching interrupt handle\n");
1540                 ret = -EFAULT;
1541                 goto unlock_out;
1542         }
1543         if (ccdc_dev->hw_ops.configure() < 0) {
1544                 v4l2_err(&vpfe_dev->v4l2_dev,
1545                          "Error in configuring ccdc\n");
1546                 ret = -EINVAL;
1547                 goto unlock_out;
1548         }
1549         ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1550         vpfe_start_ccdc_capture(vpfe_dev);
1551         mutex_unlock(&vpfe_dev->lock);
1552         return ret;
1553 unlock_out:
1554         mutex_unlock(&vpfe_dev->lock);
1555 streamoff:
1556         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1557         return ret;
1558 }
1559 
1560 static int vpfe_streamoff(struct file *file, void *priv,
1561                           enum v4l2_buf_type buf_type)
1562 {
1563         struct vpfe_device *vpfe_dev = video_drvdata(file);
1564         struct vpfe_fh *fh = file->private_data;
1565         struct vpfe_subdev_info *sdinfo;
1566         int ret = 0;
1567 
1568         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1569 
1570         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1571                 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1572                 return -EINVAL;
1573         }
1574 
1575         /* If io is allowed for this file handle, return error */
1576         if (!fh->io_allowed) {
1577                 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1578                 return -EACCES;
1579         }
1580 
1581         /* If streaming is not started, return error */
1582         if (!vpfe_dev->started) {
1583                 v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1584                 return -EINVAL;
1585         }
1586 
1587         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1588         if (ret)
1589                 return ret;
1590 
1591         vpfe_stop_ccdc_capture(vpfe_dev);
1592         vpfe_detach_irq(vpfe_dev);
1593 
1594         sdinfo = vpfe_dev->current_subdev;
1595         ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1596                                         video, s_stream, 0);
1597 
1598         if (ret && (ret != -ENOIOCTLCMD))
1599                 v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1600         ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1601         mutex_unlock(&vpfe_dev->lock);
1602         return ret;
1603 }
1604 
1605 static int vpfe_cropcap(struct file *file, void *priv,
1606                               struct v4l2_cropcap *crop)
1607 {
1608         struct vpfe_device *vpfe_dev = video_drvdata(file);
1609 
1610         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
1611 
1612         if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1613                 return -EINVAL;
1614 
1615         memset(crop, 0, sizeof(struct v4l2_cropcap));
1616         crop->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1617         crop->bounds.width = crop->defrect.width =
1618                 vpfe_standards[vpfe_dev->std_index].width;
1619         crop->bounds.height = crop->defrect.height =
1620                 vpfe_standards[vpfe_dev->std_index].height;
1621         crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1622         return 0;
1623 }
1624 
1625 static int vpfe_g_crop(struct file *file, void *priv,
1626                              struct v4l2_crop *crop)
1627 {
1628         struct vpfe_device *vpfe_dev = video_drvdata(file);
1629 
1630         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_crop\n");
1631 
1632         crop->c = vpfe_dev->crop;
1633         return 0;
1634 }
1635 
1636 static int vpfe_s_crop(struct file *file, void *priv,
1637                              const struct v4l2_crop *crop)
1638 {
1639         struct vpfe_device *vpfe_dev = video_drvdata(file);
1640         struct v4l2_rect rect = crop->c;
1641         int ret = 0;
1642 
1643         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_crop\n");
1644 
1645         if (vpfe_dev->started) {
1646                 /* make sure streaming is not started */
1647                 v4l2_err(&vpfe_dev->v4l2_dev,
1648                         "Cannot change crop when streaming is ON\n");
1649                 return -EBUSY;
1650         }
1651 
1652         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1653         if (ret)
1654                 return ret;
1655 
1656         if (rect.top < 0 || rect.left < 0) {
1657                 v4l2_err(&vpfe_dev->v4l2_dev,
1658                         "doesn't support negative values for top & left\n");
1659                 ret = -EINVAL;
1660                 goto unlock_out;
1661         }
1662 
1663         /* adjust the width to 16 pixel boundary */
1664         rect.width = ((rect.width + 15) & ~0xf);
1665 
1666         /* make sure parameters are valid */
1667         if ((rect.left + rect.width >
1668                 vpfe_dev->std_info.active_pixels) ||
1669             (rect.top + rect.height >
1670                 vpfe_dev->std_info.active_lines)) {
1671                 v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_CROP params\n");
1672                 ret = -EINVAL;
1673                 goto unlock_out;
1674         }
1675         ccdc_dev->hw_ops.set_image_window(&rect);
1676         vpfe_dev->fmt.fmt.pix.width = rect.width;
1677         vpfe_dev->fmt.fmt.pix.height = rect.height;
1678         vpfe_dev->fmt.fmt.pix.bytesperline =
1679                 ccdc_dev->hw_ops.get_line_length();
1680         vpfe_dev->fmt.fmt.pix.sizeimage =
1681                 vpfe_dev->fmt.fmt.pix.bytesperline *
1682                 vpfe_dev->fmt.fmt.pix.height;
1683         vpfe_dev->crop = rect;
1684 unlock_out:
1685         mutex_unlock(&vpfe_dev->lock);
1686         return ret;
1687 }
1688 
1689 
1690 static long vpfe_param_handler(struct file *file, void *priv,
1691                 bool valid_prio, unsigned int cmd, void *param)
1692 {
1693         struct vpfe_device *vpfe_dev = video_drvdata(file);
1694         int ret = 0;
1695 
1696         v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
1697 
1698         if (vpfe_dev->started) {
1699                 /* only allowed if streaming is not started */
1700                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1701                         "device already started\n");
1702                 return -EBUSY;
1703         }
1704 
1705         ret = mutex_lock_interruptible(&vpfe_dev->lock);
1706         if (ret)
1707                 return ret;
1708 
1709         switch (cmd) {
1710         case VPFE_CMD_S_CCDC_RAW_PARAMS:
1711                 v4l2_warn(&vpfe_dev->v4l2_dev,
1712                           "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
1713                 if (ccdc_dev->hw_ops.set_params) {
1714                         ret = ccdc_dev->hw_ops.set_params(param);
1715                         if (ret) {
1716                                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1717                                         "Error setting parameters in CCDC\n");
1718                                 goto unlock_out;
1719                         }
1720                         ret = vpfe_get_ccdc_image_format(vpfe_dev,
1721                                                          &vpfe_dev->fmt);
1722                         if (ret < 0) {
1723                                 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1724                                         "Invalid image format at CCDC\n");
1725                                 goto unlock_out;
1726                         }
1727                 } else {
1728                         ret = -EINVAL;
1729                         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1730                                 "VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
1731                 }
1732                 break;
1733         default:
1734                 ret = -ENOTTY;
1735         }
1736 unlock_out:
1737         mutex_unlock(&vpfe_dev->lock);
1738         return ret;
1739 }
1740 
1741 
1742 /* vpfe capture ioctl operations */
1743 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1744         .vidioc_querycap         = vpfe_querycap,
1745         .vidioc_g_fmt_vid_cap    = vpfe_g_fmt_vid_cap,
1746         .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1747         .vidioc_s_fmt_vid_cap    = vpfe_s_fmt_vid_cap,
1748         .vidioc_try_fmt_vid_cap  = vpfe_try_fmt_vid_cap,
1749         .vidioc_enum_input       = vpfe_enum_input,
1750         .vidioc_g_input          = vpfe_g_input,
1751         .vidioc_s_input          = vpfe_s_input,
1752         .vidioc_querystd         = vpfe_querystd,
1753         .vidioc_s_std            = vpfe_s_std,
1754         .vidioc_g_std            = vpfe_g_std,
1755         .vidioc_reqbufs          = vpfe_reqbufs,
1756         .vidioc_querybuf         = vpfe_querybuf,
1757         .vidioc_qbuf             = vpfe_qbuf,
1758         .vidioc_dqbuf            = vpfe_dqbuf,
1759         .vidioc_streamon         = vpfe_streamon,
1760         .vidioc_streamoff        = vpfe_streamoff,
1761         .vidioc_cropcap          = vpfe_cropcap,
1762         .vidioc_g_crop           = vpfe_g_crop,
1763         .vidioc_s_crop           = vpfe_s_crop,
1764         .vidioc_default          = vpfe_param_handler,
1765 };
1766 
1767 static struct vpfe_device *vpfe_initialize(void)
1768 {
1769         struct vpfe_device *vpfe_dev;
1770 
1771         /* Default number of buffers should be 3 */
1772         if ((numbuffers > 0) &&
1773             (numbuffers < config_params.min_numbuffers))
1774                 numbuffers = config_params.min_numbuffers;
1775 
1776         /*
1777          * Set buffer size to min buffers size if invalid buffer size is
1778          * given
1779          */
1780         if (bufsize < config_params.min_bufsize)
1781                 bufsize = config_params.min_bufsize;
1782 
1783         config_params.numbuffers = numbuffers;
1784 
1785         if (numbuffers)
1786                 config_params.device_bufsize = bufsize;
1787 
1788         /* Allocate memory for device objects */
1789         vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1790 
1791         return vpfe_dev;
1792 }
1793 
1794 /*
1795  * vpfe_probe : This function creates device entries by register
1796  * itself to the V4L2 driver and initializes fields of each
1797  * device objects
1798  */
1799 static int vpfe_probe(struct platform_device *pdev)
1800 {
1801         struct vpfe_subdev_info *sdinfo;
1802         struct vpfe_config *vpfe_cfg;
1803         struct resource *res1;
1804         struct vpfe_device *vpfe_dev;
1805         struct i2c_adapter *i2c_adap;
1806         struct video_device *vfd;
1807         int ret = -ENOMEM, i, j;
1808         int num_subdevs = 0;
1809 
1810         /* Get the pointer to the device object */
1811         vpfe_dev = vpfe_initialize();
1812 
1813         if (!vpfe_dev) {
1814                 v4l2_err(pdev->dev.driver,
1815                         "Failed to allocate memory for vpfe_dev\n");
1816                 return ret;
1817         }
1818 
1819         vpfe_dev->pdev = &pdev->dev;
1820 
1821         if (NULL == pdev->dev.platform_data) {
1822                 v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1823                 ret = -ENODEV;
1824                 goto probe_free_dev_mem;
1825         }
1826 
1827         vpfe_cfg = pdev->dev.platform_data;
1828         vpfe_dev->cfg = vpfe_cfg;
1829         if (NULL == vpfe_cfg->ccdc ||
1830             NULL == vpfe_cfg->card_name ||
1831             NULL == vpfe_cfg->sub_devs) {
1832                 v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1833                 ret = -ENOENT;
1834                 goto probe_free_dev_mem;
1835         }
1836 
1837         /* Allocate memory for ccdc configuration */
1838         ccdc_cfg = kmalloc(sizeof(struct ccdc_config), GFP_KERNEL);
1839         if (NULL == ccdc_cfg) {
1840                 v4l2_err(pdev->dev.driver,
1841                          "Memory allocation failed for ccdc_cfg\n");
1842                 goto probe_free_dev_mem;
1843         }
1844 
1845         mutex_lock(&ccdc_lock);
1846 
1847         strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
1848         /* Get VINT0 irq resource */
1849         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1850         if (!res1) {
1851                 v4l2_err(pdev->dev.driver,
1852                          "Unable to get interrupt for VINT0\n");
1853                 ret = -ENODEV;
1854                 goto probe_free_ccdc_cfg_mem;
1855         }
1856         vpfe_dev->ccdc_irq0 = res1->start;
1857 
1858         /* Get VINT1 irq resource */
1859         res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1860         if (!res1) {
1861                 v4l2_err(pdev->dev.driver,
1862                          "Unable to get interrupt for VINT1\n");
1863                 ret = -ENODEV;
1864                 goto probe_free_ccdc_cfg_mem;
1865         }
1866         vpfe_dev->ccdc_irq1 = res1->start;
1867 
1868         ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, 0,
1869                           "vpfe_capture0", vpfe_dev);
1870 
1871         if (0 != ret) {
1872                 v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1873                 goto probe_free_ccdc_cfg_mem;
1874         }
1875 
1876         /* Allocate memory for video device */
1877         vfd = video_device_alloc();
1878         if (NULL == vfd) {
1879                 ret = -ENOMEM;
1880                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
1881                 goto probe_out_release_irq;
1882         }
1883 
1884         /* Initialize field of video device */
1885         vfd->release            = video_device_release;
1886         vfd->fops               = &vpfe_fops;
1887         vfd->ioctl_ops          = &vpfe_ioctl_ops;
1888         vfd->tvnorms            = 0;
1889         vfd->v4l2_dev           = &vpfe_dev->v4l2_dev;
1890         snprintf(vfd->name, sizeof(vfd->name),
1891                  "%s_V%d.%d.%d",
1892                  CAPTURE_DRV_NAME,
1893                  (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1894                  (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1895                  (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1896         /* Set video_dev to the video device */
1897         vpfe_dev->video_dev     = vfd;
1898 
1899         ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1900         if (ret) {
1901                 v4l2_err(pdev->dev.driver,
1902                         "Unable to register v4l2 device.\n");
1903                 goto probe_out_video_release;
1904         }
1905         v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1906         spin_lock_init(&vpfe_dev->irqlock);
1907         spin_lock_init(&vpfe_dev->dma_queue_lock);
1908         mutex_init(&vpfe_dev->lock);
1909 
1910         /* Initialize field of the device objects */
1911         vpfe_dev->numbuffers = config_params.numbuffers;
1912 
1913         /* register video device */
1914         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1915                 "trying to register vpfe device.\n");
1916         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1917                 "video_dev=%x\n", (int)&vpfe_dev->video_dev);
1918         vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1919         set_bit(V4L2_FL_USE_FH_PRIO, &vpfe_dev->video_dev->flags);
1920         ret = video_register_device(vpfe_dev->video_dev,
1921                                     VFL_TYPE_GRABBER, -1);
1922 
1923         if (ret) {
1924                 v4l2_err(pdev->dev.driver,
1925                         "Unable to register video device.\n");
1926                 goto probe_out_v4l2_unregister;
1927         }
1928 
1929         v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1930         /* set the driver data in platform device */
1931         platform_set_drvdata(pdev, vpfe_dev);
1932         /* set driver private data */
1933         video_set_drvdata(vpfe_dev->video_dev, vpfe_dev);
1934         i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
1935         num_subdevs = vpfe_cfg->num_subdevs;
1936         vpfe_dev->sd = kmalloc(sizeof(struct v4l2_subdev *) * num_subdevs,
1937                                 GFP_KERNEL);
1938         if (NULL == vpfe_dev->sd) {
1939                 v4l2_err(&vpfe_dev->v4l2_dev,
1940                         "unable to allocate memory for subdevice pointers\n");
1941                 ret = -ENOMEM;
1942                 goto probe_out_video_unregister;
1943         }
1944 
1945         for (i = 0; i < num_subdevs; i++) {
1946                 struct v4l2_input *inps;
1947 
1948                 sdinfo = &vpfe_cfg->sub_devs[i];
1949 
1950                 /* Load up the subdevice */
1951                 vpfe_dev->sd[i] =
1952                         v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
1953                                                   i2c_adap,
1954                                                   &sdinfo->board_info,
1955                                                   NULL);
1956                 if (vpfe_dev->sd[i]) {
1957                         v4l2_info(&vpfe_dev->v4l2_dev,
1958                                   "v4l2 sub device %s registered\n",
1959                                   sdinfo->name);
1960                         vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
1961                         /* update tvnorms from the sub devices */
1962                         for (j = 0; j < sdinfo->num_inputs; j++) {
1963                                 inps = &sdinfo->inputs[j];
1964                                 vfd->tvnorms |= inps->std;
1965                         }
1966                 } else {
1967                         v4l2_info(&vpfe_dev->v4l2_dev,
1968                                   "v4l2 sub device %s register fails\n",
1969                                   sdinfo->name);
1970                         goto probe_sd_out;
1971                 }
1972         }
1973 
1974         /* set first sub device as current one */
1975         vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
1976         vpfe_dev->v4l2_dev.ctrl_handler = vpfe_dev->sd[0]->ctrl_handler;
1977 
1978         /* We have at least one sub device to work with */
1979         mutex_unlock(&ccdc_lock);
1980         return 0;
1981 
1982 probe_sd_out:
1983         kfree(vpfe_dev->sd);
1984 probe_out_video_unregister:
1985         video_unregister_device(vpfe_dev->video_dev);
1986 probe_out_v4l2_unregister:
1987         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1988 probe_out_video_release:
1989         if (!video_is_registered(vpfe_dev->video_dev))
1990                 video_device_release(vpfe_dev->video_dev);
1991 probe_out_release_irq:
1992         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1993 probe_free_ccdc_cfg_mem:
1994         kfree(ccdc_cfg);
1995         mutex_unlock(&ccdc_lock);
1996 probe_free_dev_mem:
1997         kfree(vpfe_dev);
1998         return ret;
1999 }
2000 
2001 /*
2002  * vpfe_remove : It un-register device from V4L2 driver
2003  */
2004 static int vpfe_remove(struct platform_device *pdev)
2005 {
2006         struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
2007 
2008         v4l2_info(pdev->dev.driver, "vpfe_remove\n");
2009 
2010         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2011         kfree(vpfe_dev->sd);
2012         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2013         video_unregister_device(vpfe_dev->video_dev);
2014         kfree(vpfe_dev);
2015         kfree(ccdc_cfg);
2016         return 0;
2017 }
2018 
2019 static int vpfe_suspend(struct device *dev)
2020 {
2021         return 0;
2022 }
2023 
2024 static int vpfe_resume(struct device *dev)
2025 {
2026         return 0;
2027 }
2028 
2029 static const struct dev_pm_ops vpfe_dev_pm_ops = {
2030         .suspend = vpfe_suspend,
2031         .resume = vpfe_resume,
2032 };
2033 
2034 static struct platform_driver vpfe_driver = {
2035         .driver = {
2036                 .name = CAPTURE_DRV_NAME,
2037                 .owner = THIS_MODULE,
2038                 .pm = &vpfe_dev_pm_ops,
2039         },
2040         .probe = vpfe_probe,
2041         .remove = vpfe_remove,
2042 };
2043 
2044 module_platform_driver(vpfe_driver);
2045 

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