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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 vpfe_fh *fh;
502 
503         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
504 
505         if (!vpfe_dev->cfg->num_subdevs) {
506                 v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
507                 return -ENODEV;
508         }
509 
510         /* Allocate memory for the file handle object */
511         fh = kmalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
512         if (NULL == fh) {
513                 v4l2_err(&vpfe_dev->v4l2_dev,
514                         "unable to allocate memory for file handle object\n");
515                 return -ENOMEM;
516         }
517         /* store pointer to fh in private_data member of file */
518         file->private_data = fh;
519         fh->vpfe_dev = vpfe_dev;
520         mutex_lock(&vpfe_dev->lock);
521         /* If decoder is not initialized. initialize it */
522         if (!vpfe_dev->initialized) {
523                 if (vpfe_initialize_device(vpfe_dev)) {
524                         mutex_unlock(&vpfe_dev->lock);
525                         return -ENODEV;
526                 }
527         }
528         /* Increment device usrs counter */
529         vpfe_dev->usrs++;
530         /* Set io_allowed member to false */
531         fh->io_allowed = 0;
532         /* Initialize priority of this instance to default priority */
533         fh->prio = V4L2_PRIORITY_UNSET;
534         v4l2_prio_open(&vpfe_dev->prio, &fh->prio);
535         mutex_unlock(&vpfe_dev->lock);
536         return 0;
537 }
538 
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         }
738 
739         /* Decrement device usrs counter */
740         vpfe_dev->usrs--;
741         /* Close the priority */
742         v4l2_prio_close(&vpfe_dev->prio, fh->prio);
743         /* If this is the last file handle */
744         if (!vpfe_dev->usrs) {
745                 vpfe_dev->initialized = 0;
746                 if (ccdc_dev->hw_ops.close)
747                         ccdc_dev->hw_ops.close(vpfe_dev->pdev);
748                 module_put(ccdc_dev->owner);
749         }
750         mutex_unlock(&vpfe_dev->lock);
751         file->private_data = NULL;
752         /* Free memory allocated to file handle object */
753         kfree(fh);
754         return 0;
755 }
756 
757 /*
758  * vpfe_mmap : It is used to map kernel space buffers
759  * into user spaces
760  */
761 static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
762 {
763         /* Get the device object and file handle object */
764         struct vpfe_device *vpfe_dev = video_drvdata(file);
765 
766         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
767 
768         return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
769 }
770 
771 /*
772  * vpfe_poll: It is used for select/poll system call
773  */
774 static unsigned int vpfe_poll(struct file *file, poll_table *wait)
775 {
776         struct vpfe_device *vpfe_dev = video_drvdata(file);
777 
778         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
779 
780         if (vpfe_dev->started)
781                 return videobuf_poll_stream(file,
782                                             &vpfe_dev->buffer_queue, wait);
783         return 0;
784 }
785 
786 /* vpfe capture driver file operations */
787 static const struct v4l2_file_operations vpfe_fops = {
788         .owner = THIS_MODULE,
789         .open = vpfe_open,
790         .release = vpfe_release,
791         .unlocked_ioctl = video_ioctl2,
792         .mmap = vpfe_mmap,
793         .poll = vpfe_poll
794 };
795 
796 /*
797  * vpfe_check_format()
798  * This function adjust the input pixel format as per hardware
799  * capabilities and update the same in pixfmt.
800  * Following algorithm used :-
801  *
802  *      If given pixformat is not in the vpfe list of pix formats or not
803  *      supported by the hardware, current value of pixformat in the device
804  *      is used
805  *      If given field is not supported, then current field is used. If field
806  *      is different from current, then it is matched with that from sub device.
807  *      Minimum height is 2 lines for interlaced or tb field and 1 line for
808  *      progressive. Maximum height is clamped to active active lines of scan
809  *      Minimum width is 32 bytes in memory and width is clamped to active
810  *      pixels of scan.
811  *      bytesperline is a multiple of 32.
812  */
813 static const struct vpfe_pixel_format *
814         vpfe_check_format(struct vpfe_device *vpfe_dev,
815                           struct v4l2_pix_format *pixfmt)
816 {
817         u32 min_height = 1, min_width = 32, max_width, max_height;
818         const struct vpfe_pixel_format *vpfe_pix_fmt;
819         u32 pix;
820         int temp, found;
821 
822         vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
823         if (NULL == vpfe_pix_fmt) {
824                 /*
825                  * use current pixel format in the vpfe device. We
826                  * will find this pix format in the table
827                  */
828                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
829                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
830         }
831 
832         /* check if hw supports it */
833         temp = 0;
834         found = 0;
835         while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
836                 if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
837                         found = 1;
838                         break;
839                 }
840                 temp++;
841         }
842 
843         if (!found) {
844                 /* use current pixel format */
845                 pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
846                 /*
847                  * Since this is currently used in the vpfe device, we
848                  * will find this pix format in the table
849                  */
850                 vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
851         }
852 
853         /* check what field format is supported */
854         if (pixfmt->field == V4L2_FIELD_ANY) {
855                 /* if field is any, use current value as default */
856                 pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
857         }
858 
859         /*
860          * if field is not same as current field in the vpfe device
861          * try matching the field with the sub device field
862          */
863         if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
864                 /*
865                  * If field value is not in the supported fields, use current
866                  * field used in the device as default
867                  */
868                 switch (pixfmt->field) {
869                 case V4L2_FIELD_INTERLACED:
870                 case V4L2_FIELD_SEQ_TB:
871                         /* if sub device is supporting progressive, use that */
872                         if (!vpfe_dev->std_info.frame_format)
873                                 pixfmt->field = V4L2_FIELD_NONE;
874                         break;
875                 case V4L2_FIELD_NONE:
876                         if (vpfe_dev->std_info.frame_format)
877                                 pixfmt->field = V4L2_FIELD_INTERLACED;
878                         break;
879 
880                 default:
881                         /* use current field as default */
882                         pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
883                         break;
884                 }
885         }
886 
887         /* Now adjust image resolutions supported */
888         if (pixfmt->field == V4L2_FIELD_INTERLACED ||
889             pixfmt->field == V4L2_FIELD_SEQ_TB)
890                 min_height = 2;
891 
892         max_width = vpfe_dev->std_info.active_pixels;
893         max_height = vpfe_dev->std_info.active_lines;
894         min_width /= vpfe_pix_fmt->bpp;
895 
896         v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
897                   pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
898 
899         pixfmt->width = clamp((pixfmt->width), min_width, max_width);
900         pixfmt->height = clamp((pixfmt->height), min_height, max_height);
901 
902         /* If interlaced, adjust height to be a multiple of 2 */
903         if (pixfmt->field == V4L2_FIELD_INTERLACED)
904                 pixfmt->height &= (~1);
905         /*
906          * recalculate bytesperline and sizeimage since width
907          * and height might have changed
908          */
909         pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
910                                 & ~31);
911         if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
912                 pixfmt->sizeimage =
913                         pixfmt->bytesperline * pixfmt->height +
914                         ((pixfmt->bytesperline * pixfmt->height) >> 1);
915         else
916                 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
917 
918         v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height ="
919                  " %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
920                  pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
921                  pixfmt->bytesperline, pixfmt->sizeimage);
922         return vpfe_pix_fmt;
923 }
924 
925 static int vpfe_querycap(struct file *file, void  *priv,
926                                struct v4l2_capability *cap)
927 {
928         struct vpfe_device *vpfe_dev = video_drvdata(file);
929 
930         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
931 
932         cap->version = VPFE_CAPTURE_VERSION_CODE;
933         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
934         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
935         strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
936         strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
937         return 0;
938 }
939 
940 static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
941                                 struct v4l2_format *fmt)
942 {
943         struct vpfe_device *vpfe_dev = video_drvdata(file);
944         int ret = 0;
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 ret;
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                                          core, 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         /* Initialize prio member of device object */
1912         v4l2_prio_init(&vpfe_dev->prio);
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         ret = video_register_device(vpfe_dev->video_dev,
1920                                     VFL_TYPE_GRABBER, -1);
1921 
1922         if (ret) {
1923                 v4l2_err(pdev->dev.driver,
1924                         "Unable to register video device.\n");
1925                 goto probe_out_v4l2_unregister;
1926         }
1927 
1928         v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
1929         /* set the driver data in platform device */
1930         platform_set_drvdata(pdev, vpfe_dev);
1931         /* set driver private data */
1932         video_set_drvdata(vpfe_dev->video_dev, vpfe_dev);
1933         i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
1934         num_subdevs = vpfe_cfg->num_subdevs;
1935         vpfe_dev->sd = kmalloc(sizeof(struct v4l2_subdev *) * num_subdevs,
1936                                 GFP_KERNEL);
1937         if (NULL == vpfe_dev->sd) {
1938                 v4l2_err(&vpfe_dev->v4l2_dev,
1939                         "unable to allocate memory for subdevice pointers\n");
1940                 ret = -ENOMEM;
1941                 goto probe_out_video_unregister;
1942         }
1943 
1944         for (i = 0; i < num_subdevs; i++) {
1945                 struct v4l2_input *inps;
1946 
1947                 sdinfo = &vpfe_cfg->sub_devs[i];
1948 
1949                 /* Load up the subdevice */
1950                 vpfe_dev->sd[i] =
1951                         v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
1952                                                   i2c_adap,
1953                                                   &sdinfo->board_info,
1954                                                   NULL);
1955                 if (vpfe_dev->sd[i]) {
1956                         v4l2_info(&vpfe_dev->v4l2_dev,
1957                                   "v4l2 sub device %s registered\n",
1958                                   sdinfo->name);
1959                         vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
1960                         /* update tvnorms from the sub devices */
1961                         for (j = 0; j < sdinfo->num_inputs; j++) {
1962                                 inps = &sdinfo->inputs[j];
1963                                 vfd->tvnorms |= inps->std;
1964                         }
1965                 } else {
1966                         v4l2_info(&vpfe_dev->v4l2_dev,
1967                                   "v4l2 sub device %s register fails\n",
1968                                   sdinfo->name);
1969                         goto probe_sd_out;
1970                 }
1971         }
1972 
1973         /* set first sub device as current one */
1974         vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
1975         vpfe_dev->v4l2_dev.ctrl_handler = vpfe_dev->sd[0]->ctrl_handler;
1976 
1977         /* We have at least one sub device to work with */
1978         mutex_unlock(&ccdc_lock);
1979         return 0;
1980 
1981 probe_sd_out:
1982         kfree(vpfe_dev->sd);
1983 probe_out_video_unregister:
1984         video_unregister_device(vpfe_dev->video_dev);
1985 probe_out_v4l2_unregister:
1986         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
1987 probe_out_video_release:
1988         if (!video_is_registered(vpfe_dev->video_dev))
1989                 video_device_release(vpfe_dev->video_dev);
1990 probe_out_release_irq:
1991         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1992 probe_free_ccdc_cfg_mem:
1993         kfree(ccdc_cfg);
1994         mutex_unlock(&ccdc_lock);
1995 probe_free_dev_mem:
1996         kfree(vpfe_dev);
1997         return ret;
1998 }
1999 
2000 /*
2001  * vpfe_remove : It un-register device from V4L2 driver
2002  */
2003 static int vpfe_remove(struct platform_device *pdev)
2004 {
2005         struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
2006 
2007         v4l2_info(pdev->dev.driver, "vpfe_remove\n");
2008 
2009         free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2010         kfree(vpfe_dev->sd);
2011         v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2012         video_unregister_device(vpfe_dev->video_dev);
2013         kfree(vpfe_dev);
2014         kfree(ccdc_cfg);
2015         return 0;
2016 }
2017 
2018 static int vpfe_suspend(struct device *dev)
2019 {
2020         return 0;
2021 }
2022 
2023 static int vpfe_resume(struct device *dev)
2024 {
2025         return 0;
2026 }
2027 
2028 static const struct dev_pm_ops vpfe_dev_pm_ops = {
2029         .suspend = vpfe_suspend,
2030         .resume = vpfe_resume,
2031 };
2032 
2033 static struct platform_driver vpfe_driver = {
2034         .driver = {
2035                 .name = CAPTURE_DRV_NAME,
2036                 .owner = THIS_MODULE,
2037                 .pm = &vpfe_dev_pm_ops,
2038         },
2039         .probe = vpfe_probe,
2040         .remove = vpfe_remove,
2041 };
2042 
2043 module_platform_driver(vpfe_driver);
2044 

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