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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / media / platform / davinci / vpfe_capture.c
blobee1cd79739c8caf6d9ef999738628dc85523078c
1 /*
2 * Copyright (C) 2008-2009 Texas Instruments Inc
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Driver name : VPFE Capture driver
19 * VPFE Capture driver allows applications to capture and stream video
20 * frames on DaVinci SoCs (DM6446, DM355 etc) from a YUV source such as
21 * TVP5146 or Raw Bayer RGB image data from an image sensor
22 * such as Microns' MT9T001, MT9T031 etc.
23 *
24 * These SoCs have, in common, a Video Processing Subsystem (VPSS) that
25 * consists of a Video Processing Front End (VPFE) for capturing
26 * video/raw image data and Video Processing Back End (VPBE) for displaying
27 * YUV data through an in-built analog encoder or Digital LCD port. This
28 * driver is for capture through VPFE. A typical EVM using these SoCs have
29 * following high level configuration.
30 *
31 *
32 * decoder(TVP5146/ YUV/
33 * MT9T001) --> Raw Bayer RGB ---> MUX -> VPFE (CCDC/ISIF)
34 * data input | |
35 * V |
36 * SDRAM |
37 * V
38 * Image Processor
39 * |
40 * V
41 * SDRAM
42 * The data flow happens from a decoder connected to the VPFE over a
43 * YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
44 * and to the input of VPFE through an optional MUX (if more inputs are
45 * to be interfaced on the EVM). The input data is first passed through
46 * CCDC (CCD Controller, a.k.a Image Sensor Interface, ISIF). The CCDC
47 * does very little or no processing on YUV data and does pre-process Raw
48 * Bayer RGB data through modules such as Defect Pixel Correction (DFC)
49 * Color Space Conversion (CSC), data gain/offset etc. After this, data
50 * can be written to SDRAM or can be connected to the image processing
51 * block such as IPIPE (on DM355 only).
52 *
53 * Features supported
54 * - MMAP IO
55 * - Capture using TVP5146 over BT.656
56 * - support for interfacing decoders using sub device model
57 * - Work with DM355 or DM6446 CCDC to do Raw Bayer RGB/YUV
58 * data capture to SDRAM.
59 * TODO list
60 * - Support multiple REQBUF after open
61 * - Support for de-allocating buffers through REQBUF
62 * - Support for Raw Bayer RGB capture
63 * - Support for chaining Image Processor
64 * - Support for static allocation of buffers
65 * - Support for USERPTR IO
66 * - Support for STREAMON before QBUF
67 * - Support for control ioctls
68 */
69 #include <linux/module.h>
70 #include <linux/slab.h>
71 #include <linux/init.h>
72 #include <linux/platform_device.h>
73 #include <linux/interrupt.h>
74 #include <media/v4l2-common.h>
75 #include <linux/io.h>
76 #include <media/davinci/vpfe_capture.h>
77 #include "ccdc_hw_device.h"
78
79 static int debug;
80 static u32 numbuffers = 3;
81 static u32 bufsize = (720 * 576 * 2);
82
83 module_param(numbuffers, uint, S_IRUGO);
84 module_param(bufsize, uint, S_IRUGO);
85 module_param(debug, int, 0644);
86
87 MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
88 MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
89 MODULE_PARM_DESC(debug, "Debug level 0-1");
90
91 MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
92 MODULE_LICENSE("GPL");
93 MODULE_AUTHOR("Texas Instruments");
94
95 /* standard information */
96 struct vpfe_standard {
97 v4l2_std_id std_id;
98 unsigned int width;
99 unsigned int height;
100 struct v4l2_fract pixelaspect;
101 /* 0 - progressive, 1 - interlaced */
102 int frame_format;
103 };
104
105 /* ccdc configuration */
106 struct ccdc_config {
107 /* This make sure vpfe is probed and ready to go */
108 int vpfe_probed;
109 /* name of ccdc device */
110 char name[32];
111 };
112
113 /* data structures */
114 static struct vpfe_config_params config_params = {
115 .min_numbuffers = 3,
116 .numbuffers = 3,
117 .min_bufsize = 720 * 480 * 2,
118 .device_bufsize = 720 * 576 * 2,
119 };
120
121 /* ccdc device registered */
122 static struct ccdc_hw_device *ccdc_dev;
123 /* lock for accessing ccdc information */
124 static DEFINE_MUTEX(ccdc_lock);
125 /* ccdc configuration */
126 static struct ccdc_config *ccdc_cfg;
127
128 static const struct vpfe_standard vpfe_standards[] = {
129 {V4L2_STD_525_60, 720, 480, {11, 10}, 1},
130 {V4L2_STD_625_50, 720, 576, {54, 59}, 1},
131 };
132
133 /* Used when raw Bayer image from ccdc is directly captured to SDRAM */
134 static const struct vpfe_pixel_format vpfe_pix_fmts[] = {
135 {
136 .fmtdesc = {
137 .index = 0,
138 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
139 .description = "Bayer GrRBGb 8bit A-Law compr.",
140 .pixelformat = V4L2_PIX_FMT_SBGGR8,
141 },
142 .bpp = 1,
143 },
144 {
145 .fmtdesc = {
146 .index = 1,
147 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
148 .description = "Bayer GrRBGb - 16bit",
149 .pixelformat = V4L2_PIX_FMT_SBGGR16,
150 },
151 .bpp = 2,
152 },
153 {
154 .fmtdesc = {
155 .index = 2,
156 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
157 .description = "Bayer GrRBGb 8bit DPCM compr.",
158 .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
159 },
160 .bpp = 1,
161 },
162 {
163 .fmtdesc = {
164 .index = 3,
165 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
166 .description = "YCbCr 4:2:2 Interleaved UYVY",
167 .pixelformat = V4L2_PIX_FMT_UYVY,
168 },
169 .bpp = 2,
170 },
171 {
172 .fmtdesc = {
173 .index = 4,
174 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
175 .description = "YCbCr 4:2:2 Interleaved YUYV",
176 .pixelformat = V4L2_PIX_FMT_YUYV,
177 },
178 .bpp = 2,
179 },
180 {
181 .fmtdesc = {
182 .index = 5,
183 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
184 .description = "Y/CbCr 4:2:0 - Semi planar",
185 .pixelformat = V4L2_PIX_FMT_NV12,
186 },
187 .bpp = 1,
188 },
189 };
190
191 /*
192 * vpfe_lookup_pix_format()
193 * lookup an entry in the vpfe pix format table based on pix_format
194 */
195 static const struct vpfe_pixel_format *vpfe_lookup_pix_format(u32 pix_format)
196 {
197 int i;
198
199 for (i = 0; i < ARRAY_SIZE(vpfe_pix_fmts); i++) {
200 if (pix_format == vpfe_pix_fmts[i].fmtdesc.pixelformat)
201 return &vpfe_pix_fmts[i];
202 }
203 return NULL;
204 }
205
206 /*
207 * vpfe_register_ccdc_device. CCDC module calls this to
208 * register with vpfe capture
209 */
210 int vpfe_register_ccdc_device(struct ccdc_hw_device *dev)
211 {
212 int ret = 0;
213 printk(KERN_NOTICE "vpfe_register_ccdc_device: %s\n", dev->name);
214
215 BUG_ON(!dev->hw_ops.open);
216 BUG_ON(!dev->hw_ops.enable);
217 BUG_ON(!dev->hw_ops.set_hw_if_params);
218 BUG_ON(!dev->hw_ops.configure);
219 BUG_ON(!dev->hw_ops.set_buftype);
220 BUG_ON(!dev->hw_ops.get_buftype);
221 BUG_ON(!dev->hw_ops.enum_pix);
222 BUG_ON(!dev->hw_ops.set_frame_format);
223 BUG_ON(!dev->hw_ops.get_frame_format);
224 BUG_ON(!dev->hw_ops.get_pixel_format);
225 BUG_ON(!dev->hw_ops.set_pixel_format);
226 BUG_ON(!dev->hw_ops.set_image_window);
227 BUG_ON(!dev->hw_ops.get_image_window);
228 BUG_ON(!dev->hw_ops.get_line_length);
229 BUG_ON(!dev->hw_ops.getfid);
230
231 mutex_lock(&ccdc_lock);
232 if (!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 (!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 }
285 EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
286
287 /*
288 * vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
289 */
290 static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe_dev,
291 struct v4l2_format *f)
292 {
293 struct v4l2_rect image_win;
294 enum ccdc_buftype buf_type;
295 enum ccdc_frmfmt frm_fmt;
296
297 memset(f, 0, sizeof(*f));
298 f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
299 ccdc_dev->hw_ops.get_image_window(&image_win);
300 f->fmt.pix.width = image_win.width;
301 f->fmt.pix.height = image_win.height;
302 f->fmt.pix.bytesperline = ccdc_dev->hw_ops.get_line_length();
303 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
304 f->fmt.pix.height;
305 buf_type = ccdc_dev->hw_ops.get_buftype();
306 f->fmt.pix.pixelformat = ccdc_dev->hw_ops.get_pixel_format();
307 frm_fmt = ccdc_dev->hw_ops.get_frame_format();
308 if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
309 f->fmt.pix.field = V4L2_FIELD_NONE;
310 else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
311 if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
312 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
313 else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED)
314 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
315 else {
316 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf_type\n");
317 return -EINVAL;
318 }
319 } else {
320 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid frm_fmt\n");
321 return -EINVAL;
322 }
323 return 0;
324 }
325
326 /*
327 * vpfe_config_ccdc_image_format()
328 * For a pix format, configure ccdc to setup the capture
329 */
330 static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe_dev)
331 {
332 enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
333 int ret = 0;
334
335 if (ccdc_dev->hw_ops.set_pixel_format(
336 vpfe_dev->fmt.fmt.pix.pixelformat) < 0) {
337 v4l2_err(&vpfe_dev->v4l2_dev,
338 "couldn't set pix format in ccdc\n");
339 return -EINVAL;
340 }
341 /* configure the image window */
342 ccdc_dev->hw_ops.set_image_window(&vpfe_dev->crop);
343
344 switch (vpfe_dev->fmt.fmt.pix.field) {
345 case V4L2_FIELD_INTERLACED:
346 /* do nothing, since it is default */
347 ret = ccdc_dev->hw_ops.set_buftype(
348 CCDC_BUFTYPE_FLD_INTERLEAVED);
349 break;
350 case V4L2_FIELD_NONE:
351 frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
352 /* buffer type only applicable for interlaced scan */
353 break;
354 case V4L2_FIELD_SEQ_TB:
355 ret = ccdc_dev->hw_ops.set_buftype(
356 CCDC_BUFTYPE_FLD_SEPARATED);
357 break;
358 default:
359 return -EINVAL;
360 }
361
362 /* set the frame format */
363 if (!ret)
364 ret = ccdc_dev->hw_ops.set_frame_format(frm_fmt);
365 return ret;
366 }
367 /*
368 * vpfe_config_image_format()
369 * For a given standard, this functions sets up the default
370 * pix format & crop values in the vpfe device and ccdc. It first
371 * starts with defaults based values from the standard table.
372 * It then checks if sub device supports get_fmt and then override the
373 * values based on that.Sets crop values to match with scan resolution
374 * starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
375 * values in ccdc
376 */
377 static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
378 v4l2_std_id std_id)
379 {
380 struct vpfe_subdev_info *sdinfo = vpfe_dev->current_subdev;
381 struct v4l2_subdev_format fmt = {
382 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
383 };
384 struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
385 struct v4l2_pix_format *pix = &vpfe_dev->fmt.fmt.pix;
386 int i, ret;
387
388 for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
389 if (vpfe_standards[i].std_id & std_id) {
390 vpfe_dev->std_info.active_pixels =
391 vpfe_standards[i].width;
392 vpfe_dev->std_info.active_lines =
393 vpfe_standards[i].height;
394 vpfe_dev->std_info.frame_format =
395 vpfe_standards[i].frame_format;
396 vpfe_dev->std_index = i;
397 break;
398 }
399 }
400
401 if (i == ARRAY_SIZE(vpfe_standards)) {
402 v4l2_err(&vpfe_dev->v4l2_dev, "standard not supported\n");
403 return -EINVAL;
404 }
405
406 vpfe_dev->crop.top = 0;
407 vpfe_dev->crop.left = 0;
408 vpfe_dev->crop.width = vpfe_dev->std_info.active_pixels;
409 vpfe_dev->crop.height = vpfe_dev->std_info.active_lines;
410 pix->width = vpfe_dev->crop.width;
411 pix->height = vpfe_dev->crop.height;
412
413 /* first field and frame format based on standard frame format */
414 if (vpfe_dev->std_info.frame_format) {
415 pix->field = V4L2_FIELD_INTERLACED;
416 /* assume V4L2_PIX_FMT_UYVY as default */
417 pix->pixelformat = V4L2_PIX_FMT_UYVY;
418 v4l2_fill_mbus_format(mbus_fmt, pix,
419 MEDIA_BUS_FMT_YUYV10_2X10);
420 } else {
421 pix->field = V4L2_FIELD_NONE;
422 /* assume V4L2_PIX_FMT_SBGGR8 */
423 pix->pixelformat = V4L2_PIX_FMT_SBGGR8;
424 v4l2_fill_mbus_format(mbus_fmt, pix,
425 MEDIA_BUS_FMT_SBGGR8_1X8);
426 }
427
428 /* if sub device supports get_fmt, override the defaults */
429 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
430 sdinfo->grp_id, pad, get_fmt, NULL, &fmt);
431
432 if (ret && ret != -ENOIOCTLCMD) {
433 v4l2_err(&vpfe_dev->v4l2_dev,
434 "error in getting get_fmt from sub device\n");
435 return ret;
436 }
437 v4l2_fill_pix_format(pix, mbus_fmt);
438 pix->bytesperline = pix->width * 2;
439 pix->sizeimage = pix->bytesperline * pix->height;
440
441 /* Sets the values in CCDC */
442 ret = vpfe_config_ccdc_image_format(vpfe_dev);
443 if (ret)
444 return ret;
445
446 /* Update the values of sizeimage and bytesperline */
447 pix->bytesperline = ccdc_dev->hw_ops.get_line_length();
448 pix->sizeimage = pix->bytesperline * pix->height;
449
450 return 0;
451 }
452
453 static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
454 {
455 int ret;
456
457 /* set first input of current subdevice as the current input */
458 vpfe_dev->current_input = 0;
459
460 /* set default standard */
461 vpfe_dev->std_index = 0;
462
463 /* Configure the default format information */
464 ret = vpfe_config_image_format(vpfe_dev,
465 vpfe_standards[vpfe_dev->std_index].std_id);
466 if (ret)
467 return ret;
468
469 /* now open the ccdc device to initialize it */
470 mutex_lock(&ccdc_lock);
471 if (!ccdc_dev) {
472 v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
473 ret = -ENODEV;
474 goto unlock;
475 }
476
477 if (!try_module_get(ccdc_dev->owner)) {
478 v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
479 ret = -ENODEV;
480 goto unlock;
481 }
482 ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
483 if (!ret)
484 vpfe_dev->initialized = 1;
485
486 /* Clear all VPFE/CCDC interrupts */
487 if (vpfe_dev->cfg->clr_intr)
488 vpfe_dev->cfg->clr_intr(-1);
489
490 unlock:
491 mutex_unlock(&ccdc_lock);
492 return ret;
493 }
494
495 /*
496 * vpfe_open : It creates object of file handle structure and
497 * stores it in private_data member of filepointer
498 */
499 static int vpfe_open(struct file *file)
500 {
501 struct vpfe_device *vpfe_dev = video_drvdata(file);
502 struct video_device *vdev = video_devdata(file);
503 struct vpfe_fh *fh;
504
505 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
506
507 if (!vpfe_dev->cfg->num_subdevs) {
508 v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
509 return -ENODEV;
510 }
511
512 /* Allocate memory for the file handle object */
513 fh = kmalloc(sizeof(*fh), GFP_KERNEL);
514 if (!fh)
515 return -ENOMEM;
516
517 /* store pointer to fh in private_data member of file */
518 file->private_data = fh;
519 fh->vpfe_dev = vpfe_dev;
520 v4l2_fh_init(&fh->fh, vdev);
521 mutex_lock(&vpfe_dev->lock);
522 /* If decoder is not initialized. initialize it */
523 if (!vpfe_dev->initialized) {
524 if (vpfe_initialize_device(vpfe_dev)) {
525 mutex_unlock(&vpfe_dev->lock);
526 return -ENODEV;
527 }
528 }
529 /* Increment device usrs counter */
530 vpfe_dev->usrs++;
531 /* Set io_allowed member to false */
532 fh->io_allowed = 0;
533 v4l2_fh_add(&fh->fh);
534 mutex_unlock(&vpfe_dev->lock);
535 return 0;
536 }
537
538 static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
539 {
540 unsigned long addr;
541
542 vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
543 struct videobuf_buffer, queue);
544 list_del(&vpfe_dev->next_frm->queue);
545 vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
546 addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
547
548 ccdc_dev->hw_ops.setfbaddr(addr);
549 }
550
551 static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev)
552 {
553 unsigned long addr;
554
555 addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
556 addr += vpfe_dev->field_off;
557 ccdc_dev->hw_ops.setfbaddr(addr);
558 }
559
560 static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
561 {
562 v4l2_get_timestamp(&vpfe_dev->cur_frm->ts);
563 vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
564 vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
565 wake_up_interruptible(&vpfe_dev->cur_frm->done);
566 vpfe_dev->cur_frm = vpfe_dev->next_frm;
567 }
568
569 /* ISR for VINT0*/
570 static irqreturn_t vpfe_isr(int irq, void *dev_id)
571 {
572 struct vpfe_device *vpfe_dev = dev_id;
573 enum v4l2_field field;
574 int fid;
575
576 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
577 field = vpfe_dev->fmt.fmt.pix.field;
578
579 /* if streaming not started, don't do anything */
580 if (!vpfe_dev->started)
581 goto clear_intr;
582
583 /* only for 6446 this will be applicable */
584 if (ccdc_dev->hw_ops.reset)
585 ccdc_dev->hw_ops.reset();
586
587 if (field == V4L2_FIELD_NONE) {
588 /* handle progressive frame capture */
589 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
590 "frame format is progressive...\n");
591 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
592 vpfe_process_buffer_complete(vpfe_dev);
593 goto clear_intr;
594 }
595
596 /* interlaced or TB capture check which field we are in hardware */
597 fid = ccdc_dev->hw_ops.getfid();
598
599 /* switch the software maintained field id */
600 vpfe_dev->field_id ^= 1;
601 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
602 fid, vpfe_dev->field_id);
603 if (fid == vpfe_dev->field_id) {
604 /* we are in-sync here,continue */
605 if (fid == 0) {
606 /*
607 * One frame is just being captured. If the next frame
608 * is available, release the current frame and move on
609 */
610 if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
611 vpfe_process_buffer_complete(vpfe_dev);
612 /*
613 * based on whether the two fields are stored
614 * interleavely or separately in memory, reconfigure
615 * the CCDC memory address
616 */
617 if (field == V4L2_FIELD_SEQ_TB)
618 vpfe_schedule_bottom_field(vpfe_dev);
619 goto clear_intr;
620 }
621 /*
622 * if one field is just being captured configure
623 * the next frame get the next frame from the empty
624 * queue if no frame is available hold on to the
625 * current buffer
626 */
627 spin_lock(&vpfe_dev->dma_queue_lock);
628 if (!list_empty(&vpfe_dev->dma_queue) &&
629 vpfe_dev->cur_frm == vpfe_dev->next_frm)
630 vpfe_schedule_next_buffer(vpfe_dev);
631 spin_unlock(&vpfe_dev->dma_queue_lock);
632 } else if (fid == 0) {
633 /*
634 * out of sync. Recover from any hardware out-of-sync.
635 * May loose one frame
636 */
637 vpfe_dev->field_id = fid;
638 }
639 clear_intr:
640 if (vpfe_dev->cfg->clr_intr)
641 vpfe_dev->cfg->clr_intr(irq);
642
643 return IRQ_HANDLED;
644 }
645
646 /* vdint1_isr - isr handler for VINT1 interrupt */
647 static irqreturn_t vdint1_isr(int irq, void *dev_id)
648 {
649 struct vpfe_device *vpfe_dev = dev_id;
650
651 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
652
653 /* if streaming not started, don't do anything */
654 if (!vpfe_dev->started) {
655 if (vpfe_dev->cfg->clr_intr)
656 vpfe_dev->cfg->clr_intr(irq);
657 return IRQ_HANDLED;
658 }
659
660 spin_lock(&vpfe_dev->dma_queue_lock);
661 if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
662 !list_empty(&vpfe_dev->dma_queue) &&
663 vpfe_dev->cur_frm == vpfe_dev->next_frm)
664 vpfe_schedule_next_buffer(vpfe_dev);
665 spin_unlock(&vpfe_dev->dma_queue_lock);
666
667 if (vpfe_dev->cfg->clr_intr)
668 vpfe_dev->cfg->clr_intr(irq);
669
670 return IRQ_HANDLED;
671 }
672
673 static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
674 {
675 enum ccdc_frmfmt frame_format;
676
677 frame_format = ccdc_dev->hw_ops.get_frame_format();
678 if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
679 free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
680 }
681
682 static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
683 {
684 enum ccdc_frmfmt frame_format;
685
686 frame_format = ccdc_dev->hw_ops.get_frame_format();
687 if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
688 return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
689 0, "vpfe_capture1",
690 vpfe_dev);
691 }
692 return 0;
693 }
694
695 /* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
696 static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
697 {
698 vpfe_dev->started = 0;
699 ccdc_dev->hw_ops.enable(0);
700 if (ccdc_dev->hw_ops.enable_out_to_sdram)
701 ccdc_dev->hw_ops.enable_out_to_sdram(0);
702 }
703
704 /*
705 * vpfe_release : This function deletes buffer queue, frees the
706 * buffers and the vpfe file handle
707 */
708 static int vpfe_release(struct file *file)
709 {
710 struct vpfe_device *vpfe_dev = video_drvdata(file);
711 struct vpfe_fh *fh = file->private_data;
712 struct vpfe_subdev_info *sdinfo;
713 int ret;
714
715 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
716
717 /* Get the device lock */
718 mutex_lock(&vpfe_dev->lock);
719 /* if this instance is doing IO */
720 if (fh->io_allowed) {
721 if (vpfe_dev->started) {
722 sdinfo = vpfe_dev->current_subdev;
723 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
724 sdinfo->grp_id,
725 video, s_stream, 0);
726 if (ret && (ret != -ENOIOCTLCMD))
727 v4l2_err(&vpfe_dev->v4l2_dev,
728 "stream off failed in subdev\n");
729 vpfe_stop_ccdc_capture(vpfe_dev);
730 vpfe_detach_irq(vpfe_dev);
731 videobuf_streamoff(&vpfe_dev->buffer_queue);
732 }
733 vpfe_dev->io_usrs = 0;
734 vpfe_dev->numbuffers = config_params.numbuffers;
735 videobuf_stop(&vpfe_dev->buffer_queue);
736 videobuf_mmap_free(&vpfe_dev->buffer_queue);
737 }
738
739 /* Decrement device usrs counter */
740 vpfe_dev->usrs--;
741 v4l2_fh_del(&fh->fh);
742 v4l2_fh_exit(&fh->fh);
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 (!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 = %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
919 pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
920 pixfmt->bytesperline, pixfmt->sizeimage);
921 return vpfe_pix_fmt;
922 }
923
924 static int vpfe_querycap(struct file *file, void *priv,
925 struct v4l2_capability *cap)
926 {
927 struct vpfe_device *vpfe_dev = video_drvdata(file);
928
929 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
930
931 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
932 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
933 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
934 strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
935 strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
936 return 0;
937 }
938
939 static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
940 struct v4l2_format *fmt)
941 {
942 struct vpfe_device *vpfe_dev = video_drvdata(file);
943
944 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
945 /* Fill in the information about format */
946 *fmt = vpfe_dev->fmt;
947 return 0;
948 }
949
950 static int vpfe_enum_fmt_vid_cap(struct file *file, void *priv,
951 struct v4l2_fmtdesc *fmt)
952 {
953 struct vpfe_device *vpfe_dev = video_drvdata(file);
954 const struct vpfe_pixel_format *pix_fmt;
955 int temp_index;
956 u32 pix;
957
958 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
959
960 if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
961 return -EINVAL;
962
963 /* Fill in the information about format */
964 pix_fmt = vpfe_lookup_pix_format(pix);
965 if (pix_fmt) {
966 temp_index = fmt->index;
967 *fmt = pix_fmt->fmtdesc;
968 fmt->index = temp_index;
969 return 0;
970 }
971 return -EINVAL;
972 }
973
974 static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
975 struct v4l2_format *fmt)
976 {
977 struct vpfe_device *vpfe_dev = video_drvdata(file);
978 const struct vpfe_pixel_format *pix_fmts;
979 int ret;
980
981 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
982
983 /* If streaming is started, return error */
984 if (vpfe_dev->started) {
985 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
986 return -EBUSY;
987 }
988
989 /* Check for valid frame format */
990 pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
991 if (!pix_fmts)
992 return -EINVAL;
993
994 /* store the pixel format in the device object */
995 ret = mutex_lock_interruptible(&vpfe_dev->lock);
996 if (ret)
997 return ret;
998
999 /* First detach any IRQ if currently attached */
1000 vpfe_detach_irq(vpfe_dev);
1001 vpfe_dev->fmt = *fmt;
1002 /* set image capture parameters in the ccdc */
1003 ret = vpfe_config_ccdc_image_format(vpfe_dev);
1004 mutex_unlock(&vpfe_dev->lock);
1005 return ret;
1006 }
1007
1008 static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
1009 struct v4l2_format *f)
1010 {
1011 struct vpfe_device *vpfe_dev = video_drvdata(file);
1012 const struct vpfe_pixel_format *pix_fmts;
1013
1014 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
1015
1016 pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
1017 if (!pix_fmts)
1018 return -EINVAL;
1019 return 0;
1020 }
1021
1022 /*
1023 * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1024 * given app input index
1025 */
1026 static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
1027 int *subdev_index,
1028 int *subdev_input_index,
1029 int app_input_index)
1030 {
1031 struct vpfe_config *cfg = vpfe_dev->cfg;
1032 struct vpfe_subdev_info *sdinfo;
1033 int i, j = 0;
1034
1035 for (i = 0; i < cfg->num_subdevs; i++) {
1036 sdinfo = &cfg->sub_devs[i];
1037 if (app_input_index < (j + sdinfo->num_inputs)) {
1038 *subdev_index = i;
1039 *subdev_input_index = app_input_index - j;
1040 return 0;
1041 }
1042 j += sdinfo->num_inputs;
1043 }
1044 return -EINVAL;
1045 }
1046
1047 /*
1048 * vpfe_get_app_input - Get app input index for a given subdev input index
1049 * driver stores the input index of the current sub device and translate it
1050 * when application request the current input
1051 */
1052 static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
1053 int *app_input_index)
1054 {
1055 struct vpfe_config *cfg = vpfe_dev->cfg;
1056 struct vpfe_subdev_info *sdinfo;
1057 int i, j = 0;
1058
1059 for (i = 0; i < cfg->num_subdevs; i++) {
1060 sdinfo = &cfg->sub_devs[i];
1061 if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
1062 if (vpfe_dev->current_input >= sdinfo->num_inputs)
1063 return -1;
1064 *app_input_index = j + vpfe_dev->current_input;
1065 return 0;
1066 }
1067 j += sdinfo->num_inputs;
1068 }
1069 return -EINVAL;
1070 }
1071
1072 static int vpfe_enum_input(struct file *file, void *priv,
1073 struct v4l2_input *inp)
1074 {
1075 struct vpfe_device *vpfe_dev = video_drvdata(file);
1076 struct vpfe_subdev_info *sdinfo;
1077 int subdev, index ;
1078
1079 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
1080
1081 if (vpfe_get_subdev_input_index(vpfe_dev,
1082 &subdev,
1083 &index,
1084 inp->index) < 0) {
1085 v4l2_err(&vpfe_dev->v4l2_dev, "input information not found for the subdev\n");
1086 return -EINVAL;
1087 }
1088 sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
1089 *inp = sdinfo->inputs[index];
1090 return 0;
1091 }
1092
1093 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1094 {
1095 struct vpfe_device *vpfe_dev = video_drvdata(file);
1096
1097 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
1098
1099 return vpfe_get_app_input_index(vpfe_dev, index);
1100 }
1101
1102
1103 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1104 {
1105 struct vpfe_device *vpfe_dev = video_drvdata(file);
1106 struct v4l2_subdev *sd;
1107 struct vpfe_subdev_info *sdinfo;
1108 int subdev_index, inp_index;
1109 struct vpfe_route *route;
1110 u32 input, output;
1111 int ret;
1112
1113 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
1114
1115 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1116 if (ret)
1117 return ret;
1118
1119 /*
1120 * If streaming is started return device busy
1121 * error
1122 */
1123 if (vpfe_dev->started) {
1124 v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
1125 ret = -EBUSY;
1126 goto unlock_out;
1127 }
1128 ret = vpfe_get_subdev_input_index(vpfe_dev,
1129 &subdev_index,
1130 &inp_index,
1131 index);
1132 if (ret < 0) {
1133 v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
1134 goto unlock_out;
1135 }
1136
1137 sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
1138 sd = vpfe_dev->sd[subdev_index];
1139 route = &sdinfo->routes[inp_index];
1140 if (route && sdinfo->can_route) {
1141 input = route->input;
1142 output = route->output;
1143 } else {
1144 input = 0;
1145 output = 0;
1146 }
1147
1148 if (sd)
1149 ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
1150
1151 if (ret) {
1152 v4l2_err(&vpfe_dev->v4l2_dev,
1153 "vpfe_doioctl:error in setting input in decoder\n");
1154 ret = -EINVAL;
1155 goto unlock_out;
1156 }
1157 vpfe_dev->current_subdev = sdinfo;
1158 if (sd)
1159 vpfe_dev->v4l2_dev.ctrl_handler = sd->ctrl_handler;
1160 vpfe_dev->current_input = index;
1161 vpfe_dev->std_index = 0;
1162
1163 /* set the bus/interface parameter for the sub device in ccdc */
1164 ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
1165 if (ret)
1166 goto unlock_out;
1167
1168 /* set the default image parameters in the device */
1169 ret = vpfe_config_image_format(vpfe_dev,
1170 vpfe_standards[vpfe_dev->std_index].std_id);
1171 unlock_out:
1172 mutex_unlock(&vpfe_dev->lock);
1173 return ret;
1174 }
1175
1176 static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1177 {
1178 struct vpfe_device *vpfe_dev = video_drvdata(file);
1179 struct vpfe_subdev_info *sdinfo;
1180 int ret;
1181
1182 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
1183
1184 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1185 sdinfo = vpfe_dev->current_subdev;
1186 if (ret)
1187 return ret;
1188 /* Call querystd function of decoder device */
1189 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1190 video, querystd, std_id);
1191 mutex_unlock(&vpfe_dev->lock);
1192 return ret;
1193 }
1194
1195 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1196 {
1197 struct vpfe_device *vpfe_dev = video_drvdata(file);
1198 struct vpfe_subdev_info *sdinfo;
1199 int ret;
1200
1201 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
1202
1203 /* Call decoder driver function to set the standard */
1204 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1205 if (ret)
1206 return ret;
1207
1208 sdinfo = vpfe_dev->current_subdev;
1209 /* If streaming is started, return device busy error */
1210 if (vpfe_dev->started) {
1211 v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
1212 ret = -EBUSY;
1213 goto unlock_out;
1214 }
1215
1216 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1217 video, s_std, std_id);
1218 if (ret < 0) {
1219 v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
1220 goto unlock_out;
1221 }
1222 ret = vpfe_config_image_format(vpfe_dev, std_id);
1223
1224 unlock_out:
1225 mutex_unlock(&vpfe_dev->lock);
1226 return ret;
1227 }
1228
1229 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1230 {
1231 struct vpfe_device *vpfe_dev = video_drvdata(file);
1232
1233 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
1234
1235 *std_id = vpfe_standards[vpfe_dev->std_index].std_id;
1236 return 0;
1237 }
1238 /*
1239 * Videobuf operations
1240 */
1241 static int vpfe_videobuf_setup(struct videobuf_queue *vq,
1242 unsigned int *count,
1243 unsigned int *size)
1244 {
1245 struct vpfe_fh *fh = vq->priv_data;
1246 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1247
1248 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
1249 *size = vpfe_dev->fmt.fmt.pix.sizeimage;
1250 if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
1251 vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
1252 *size = config_params.device_bufsize;
1253
1254 if (*count < config_params.min_numbuffers)
1255 *count = config_params.min_numbuffers;
1256 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1257 "count=%d, size=%d\n", *count, *size);
1258 return 0;
1259 }
1260
1261 static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
1262 struct videobuf_buffer *vb,
1263 enum v4l2_field field)
1264 {
1265 struct vpfe_fh *fh = vq->priv_data;
1266 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1267 unsigned long addr;
1268 int ret;
1269
1270 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
1271
1272 /* If buffer is not initialized, initialize it */
1273 if (VIDEOBUF_NEEDS_INIT == vb->state) {
1274 vb->width = vpfe_dev->fmt.fmt.pix.width;
1275 vb->height = vpfe_dev->fmt.fmt.pix.height;
1276 vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
1277 vb->field = field;
1278
1279 ret = videobuf_iolock(vq, vb, NULL);
1280 if (ret < 0)
1281 return ret;
1282
1283 addr = videobuf_to_dma_contig(vb);
1284 /* Make sure user addresses are aligned to 32 bytes */
1285 if (!ALIGN(addr, 32))
1286 return -EINVAL;
1287
1288 vb->state = VIDEOBUF_PREPARED;
1289 }
1290 return 0;
1291 }
1292
1293 static void vpfe_videobuf_queue(struct videobuf_queue *vq,
1294 struct videobuf_buffer *vb)
1295 {
1296 /* Get the file handle object and device object */
1297 struct vpfe_fh *fh = vq->priv_data;
1298 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1299 unsigned long flags;
1300
1301 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
1302
1303 /* add the buffer to the DMA queue */
1304 spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1305 list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
1306 spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1307
1308 /* Change state of the buffer */
1309 vb->state = VIDEOBUF_QUEUED;
1310 }
1311
1312 static void vpfe_videobuf_release(struct videobuf_queue *vq,
1313 struct videobuf_buffer *vb)
1314 {
1315 struct vpfe_fh *fh = vq->priv_data;
1316 struct vpfe_device *vpfe_dev = fh->vpfe_dev;
1317 unsigned long flags;
1318
1319 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
1320
1321 /*
1322 * We need to flush the buffer from the dma queue since
1323 * they are de-allocated
1324 */
1325 spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
1326 INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1327 spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
1328 videobuf_dma_contig_free(vq, vb);
1329 vb->state = VIDEOBUF_NEEDS_INIT;
1330 }
1331
1332 static struct videobuf_queue_ops vpfe_videobuf_qops = {
1333 .buf_setup = vpfe_videobuf_setup,
1334 .buf_prepare = vpfe_videobuf_prepare,
1335 .buf_queue = vpfe_videobuf_queue,
1336 .buf_release = vpfe_videobuf_release,
1337 };
1338
1339 /*
1340 * vpfe_reqbufs. currently support REQBUF only once opening
1341 * the device.
1342 */
1343 static int vpfe_reqbufs(struct file *file, void *priv,
1344 struct v4l2_requestbuffers *req_buf)
1345 {
1346 struct vpfe_device *vpfe_dev = video_drvdata(file);
1347 struct vpfe_fh *fh = file->private_data;
1348 int ret;
1349
1350 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
1351
1352 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
1353 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
1354 return -EINVAL;
1355 }
1356
1357 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1358 if (ret)
1359 return ret;
1360
1361 if (vpfe_dev->io_usrs != 0) {
1362 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
1363 ret = -EBUSY;
1364 goto unlock_out;
1365 }
1366
1367 vpfe_dev->memory = req_buf->memory;
1368 videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
1369 &vpfe_videobuf_qops,
1370 vpfe_dev->pdev,
1371 &vpfe_dev->irqlock,
1372 req_buf->type,
1373 vpfe_dev->fmt.fmt.pix.field,
1374 sizeof(struct videobuf_buffer),
1375 fh, NULL);
1376
1377 fh->io_allowed = 1;
1378 vpfe_dev->io_usrs = 1;
1379 INIT_LIST_HEAD(&vpfe_dev->dma_queue);
1380 ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
1381 unlock_out:
1382 mutex_unlock(&vpfe_dev->lock);
1383 return ret;
1384 }
1385
1386 static int vpfe_querybuf(struct file *file, void *priv,
1387 struct v4l2_buffer *buf)
1388 {
1389 struct vpfe_device *vpfe_dev = video_drvdata(file);
1390
1391 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
1392
1393 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1394 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1395 return -EINVAL;
1396 }
1397
1398 if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
1399 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
1400 return -EINVAL;
1401 }
1402 /* Call videobuf_querybuf to get information */
1403 return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
1404 }
1405
1406 static int vpfe_qbuf(struct file *file, void *priv,
1407 struct v4l2_buffer *p)
1408 {
1409 struct vpfe_device *vpfe_dev = video_drvdata(file);
1410 struct vpfe_fh *fh = file->private_data;
1411
1412 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
1413
1414 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
1415 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1416 return -EINVAL;
1417 }
1418
1419 /*
1420 * If this file handle is not allowed to do IO,
1421 * return error
1422 */
1423 if (!fh->io_allowed) {
1424 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1425 return -EACCES;
1426 }
1427 return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
1428 }
1429
1430 static int vpfe_dqbuf(struct file *file, void *priv,
1431 struct v4l2_buffer *buf)
1432 {
1433 struct vpfe_device *vpfe_dev = video_drvdata(file);
1434
1435 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
1436
1437 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
1438 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1439 return -EINVAL;
1440 }
1441 return videobuf_dqbuf(&vpfe_dev->buffer_queue,
1442 buf, file->f_flags & O_NONBLOCK);
1443 }
1444
1445 /*
1446 * vpfe_calculate_offsets : This function calculates buffers offset
1447 * for top and bottom field
1448 */
1449 static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
1450 {
1451 struct v4l2_rect image_win;
1452
1453 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
1454
1455 ccdc_dev->hw_ops.get_image_window(&image_win);
1456 vpfe_dev->field_off = image_win.height * image_win.width;
1457 }
1458
1459 /* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
1460 static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
1461 {
1462 ccdc_dev->hw_ops.enable(1);
1463 if (ccdc_dev->hw_ops.enable_out_to_sdram)
1464 ccdc_dev->hw_ops.enable_out_to_sdram(1);
1465 vpfe_dev->started = 1;
1466 }
1467
1468 /*
1469 * vpfe_streamon. Assume the DMA queue is not empty.
1470 * application is expected to call QBUF before calling
1471 * this ioctl. If not, driver returns error
1472 */
1473 static int vpfe_streamon(struct file *file, void *priv,
1474 enum v4l2_buf_type buf_type)
1475 {
1476 struct vpfe_device *vpfe_dev = video_drvdata(file);
1477 struct vpfe_fh *fh = file->private_data;
1478 struct vpfe_subdev_info *sdinfo;
1479 unsigned long addr;
1480 int ret;
1481
1482 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
1483
1484 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1485 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1486 return -EINVAL;
1487 }
1488
1489 /* If file handle is not allowed IO, return error */
1490 if (!fh->io_allowed) {
1491 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1492 return -EACCES;
1493 }
1494
1495 sdinfo = vpfe_dev->current_subdev;
1496 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1497 video, s_stream, 1);
1498
1499 if (ret && (ret != -ENOIOCTLCMD)) {
1500 v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
1501 return -EINVAL;
1502 }
1503
1504 /* If buffer queue is empty, return error */
1505 if (list_empty(&vpfe_dev->buffer_queue.stream)) {
1506 v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
1507 return -EIO;
1508 }
1509
1510 /* Call videobuf_streamon to start streaming * in videobuf */
1511 ret = videobuf_streamon(&vpfe_dev->buffer_queue);
1512 if (ret)
1513 return ret;
1514
1515
1516 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1517 if (ret)
1518 goto streamoff;
1519 /* Get the next frame from the buffer queue */
1520 vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
1521 struct videobuf_buffer, queue);
1522 vpfe_dev->cur_frm = vpfe_dev->next_frm;
1523 /* Remove buffer from the buffer queue */
1524 list_del(&vpfe_dev->cur_frm->queue);
1525 /* Mark state of the current frame to active */
1526 vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
1527 /* Initialize field_id and started member */
1528 vpfe_dev->field_id = 0;
1529 addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
1530
1531 /* Calculate field offset */
1532 vpfe_calculate_offsets(vpfe_dev);
1533
1534 if (vpfe_attach_irq(vpfe_dev) < 0) {
1535 v4l2_err(&vpfe_dev->v4l2_dev,
1536 "Error in attaching interrupt handle\n");
1537 ret = -EFAULT;
1538 goto unlock_out;
1539 }
1540 if (ccdc_dev->hw_ops.configure() < 0) {
1541 v4l2_err(&vpfe_dev->v4l2_dev,
1542 "Error in configuring ccdc\n");
1543 ret = -EINVAL;
1544 goto unlock_out;
1545 }
1546 ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
1547 vpfe_start_ccdc_capture(vpfe_dev);
1548 mutex_unlock(&vpfe_dev->lock);
1549 return ret;
1550 unlock_out:
1551 mutex_unlock(&vpfe_dev->lock);
1552 streamoff:
1553 ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1554 return ret;
1555 }
1556
1557 static int vpfe_streamoff(struct file *file, void *priv,
1558 enum v4l2_buf_type buf_type)
1559 {
1560 struct vpfe_device *vpfe_dev = video_drvdata(file);
1561 struct vpfe_fh *fh = file->private_data;
1562 struct vpfe_subdev_info *sdinfo;
1563 int ret;
1564
1565 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
1566
1567 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
1568 v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
1569 return -EINVAL;
1570 }
1571
1572 /* If io is allowed for this file handle, return error */
1573 if (!fh->io_allowed) {
1574 v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
1575 return -EACCES;
1576 }
1577
1578 /* If streaming is not started, return error */
1579 if (!vpfe_dev->started) {
1580 v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
1581 return -EINVAL;
1582 }
1583
1584 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1585 if (ret)
1586 return ret;
1587
1588 vpfe_stop_ccdc_capture(vpfe_dev);
1589 vpfe_detach_irq(vpfe_dev);
1590
1591 sdinfo = vpfe_dev->current_subdev;
1592 ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
1593 video, s_stream, 0);
1594
1595 if (ret && (ret != -ENOIOCTLCMD))
1596 v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
1597 ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
1598 mutex_unlock(&vpfe_dev->lock);
1599 return ret;
1600 }
1601
1602 static int vpfe_cropcap(struct file *file, void *priv,
1603 struct v4l2_cropcap *crop)
1604 {
1605 struct vpfe_device *vpfe_dev = video_drvdata(file);
1606
1607 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
1608
1609 if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1610 return -EINVAL;
1611 /* If std_index is invalid, then just return (== 1:1 aspect) */
1612 if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
1613 return 0;
1614
1615 crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
1616 return 0;
1617 }
1618
1619 static int vpfe_g_selection(struct file *file, void *priv,
1620 struct v4l2_selection *sel)
1621 {
1622 struct vpfe_device *vpfe_dev = video_drvdata(file);
1623
1624 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_selection\n");
1625
1626 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1627 return -EINVAL;
1628
1629 switch (sel->target) {
1630 case V4L2_SEL_TGT_CROP:
1631 sel->r = vpfe_dev->crop;
1632 break;
1633 case V4L2_SEL_TGT_CROP_DEFAULT:
1634 case V4L2_SEL_TGT_CROP_BOUNDS:
1635 sel->r.width = vpfe_standards[vpfe_dev->std_index].width;
1636 sel->r.height = vpfe_standards[vpfe_dev->std_index].height;
1637 break;
1638 default:
1639 return -EINVAL;
1640 }
1641 return 0;
1642 }
1643
1644 static int vpfe_s_selection(struct file *file, void *priv,
1645 struct v4l2_selection *sel)
1646 {
1647 struct vpfe_device *vpfe_dev = video_drvdata(file);
1648 struct v4l2_rect rect = sel->r;
1649 int ret;
1650
1651 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_selection\n");
1652
1653 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1654 sel->target != V4L2_SEL_TGT_CROP)
1655 return -EINVAL;
1656
1657 if (vpfe_dev->started) {
1658 /* make sure streaming is not started */
1659 v4l2_err(&vpfe_dev->v4l2_dev,
1660 "Cannot change crop when streaming is ON\n");
1661 return -EBUSY;
1662 }
1663
1664 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1665 if (ret)
1666 return ret;
1667
1668 if (rect.top < 0 || rect.left < 0) {
1669 v4l2_err(&vpfe_dev->v4l2_dev,
1670 "doesn't support negative values for top & left\n");
1671 ret = -EINVAL;
1672 goto unlock_out;
1673 }
1674
1675 /* adjust the width to 16 pixel boundary */
1676 rect.width = ((rect.width + 15) & ~0xf);
1677
1678 /* make sure parameters are valid */
1679 if ((rect.left + rect.width >
1680 vpfe_dev->std_info.active_pixels) ||
1681 (rect.top + rect.height >
1682 vpfe_dev->std_info.active_lines)) {
1683 v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_SELECTION params\n");
1684 ret = -EINVAL;
1685 goto unlock_out;
1686 }
1687 ccdc_dev->hw_ops.set_image_window(&rect);
1688 vpfe_dev->fmt.fmt.pix.width = rect.width;
1689 vpfe_dev->fmt.fmt.pix.height = rect.height;
1690 vpfe_dev->fmt.fmt.pix.bytesperline =
1691 ccdc_dev->hw_ops.get_line_length();
1692 vpfe_dev->fmt.fmt.pix.sizeimage =
1693 vpfe_dev->fmt.fmt.pix.bytesperline *
1694 vpfe_dev->fmt.fmt.pix.height;
1695 vpfe_dev->crop = rect;
1696 sel->r = rect;
1697 unlock_out:
1698 mutex_unlock(&vpfe_dev->lock);
1699 return ret;
1700 }
1701
1702
1703 static long vpfe_param_handler(struct file *file, void *priv,
1704 bool valid_prio, unsigned int cmd, void *param)
1705 {
1706 struct vpfe_device *vpfe_dev = video_drvdata(file);
1707 int ret;
1708
1709 v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
1710
1711 if (vpfe_dev->started) {
1712 /* only allowed if streaming is not started */
1713 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1714 "device already started\n");
1715 return -EBUSY;
1716 }
1717
1718 ret = mutex_lock_interruptible(&vpfe_dev->lock);
1719 if (ret)
1720 return ret;
1721
1722 switch (cmd) {
1723 case VPFE_CMD_S_CCDC_RAW_PARAMS:
1724 v4l2_warn(&vpfe_dev->v4l2_dev,
1725 "VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
1726 if (ccdc_dev->hw_ops.set_params) {
1727 ret = ccdc_dev->hw_ops.set_params(param);
1728 if (ret) {
1729 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1730 "Error setting parameters in CCDC\n");
1731 goto unlock_out;
1732 }
1733 ret = vpfe_get_ccdc_image_format(vpfe_dev,
1734 &vpfe_dev->fmt);
1735 if (ret < 0) {
1736 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1737 "Invalid image format at CCDC\n");
1738 goto unlock_out;
1739 }
1740 } else {
1741 ret = -EINVAL;
1742 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1743 "VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
1744 }
1745 break;
1746 default:
1747 ret = -ENOTTY;
1748 }
1749 unlock_out:
1750 mutex_unlock(&vpfe_dev->lock);
1751 return ret;
1752 }
1753
1754
1755 /* vpfe capture ioctl operations */
1756 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
1757 .vidioc_querycap = vpfe_querycap,
1758 .vidioc_g_fmt_vid_cap = vpfe_g_fmt_vid_cap,
1759 .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
1760 .vidioc_s_fmt_vid_cap = vpfe_s_fmt_vid_cap,
1761 .vidioc_try_fmt_vid_cap = vpfe_try_fmt_vid_cap,
1762 .vidioc_enum_input = vpfe_enum_input,
1763 .vidioc_g_input = vpfe_g_input,
1764 .vidioc_s_input = vpfe_s_input,
1765 .vidioc_querystd = vpfe_querystd,
1766 .vidioc_s_std = vpfe_s_std,
1767 .vidioc_g_std = vpfe_g_std,
1768 .vidioc_reqbufs = vpfe_reqbufs,
1769 .vidioc_querybuf = vpfe_querybuf,
1770 .vidioc_qbuf = vpfe_qbuf,
1771 .vidioc_dqbuf = vpfe_dqbuf,
1772 .vidioc_streamon = vpfe_streamon,
1773 .vidioc_streamoff = vpfe_streamoff,
1774 .vidioc_cropcap = vpfe_cropcap,
1775 .vidioc_g_selection = vpfe_g_selection,
1776 .vidioc_s_selection = vpfe_s_selection,
1777 .vidioc_default = vpfe_param_handler,
1778 };
1779
1780 static struct vpfe_device *vpfe_initialize(void)
1781 {
1782 struct vpfe_device *vpfe_dev;
1783
1784 /* Default number of buffers should be 3 */
1785 if ((numbuffers > 0) &&
1786 (numbuffers < config_params.min_numbuffers))
1787 numbuffers = config_params.min_numbuffers;
1788
1789 /*
1790 * Set buffer size to min buffers size if invalid buffer size is
1791 * given
1792 */
1793 if (bufsize < config_params.min_bufsize)
1794 bufsize = config_params.min_bufsize;
1795
1796 config_params.numbuffers = numbuffers;
1797
1798 if (numbuffers)
1799 config_params.device_bufsize = bufsize;
1800
1801 /* Allocate memory for device objects */
1802 vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
1803
1804 return vpfe_dev;
1805 }
1806
1807 /*
1808 * vpfe_probe : This function creates device entries by register
1809 * itself to the V4L2 driver and initializes fields of each
1810 * device objects
1811 */
1812 static int vpfe_probe(struct platform_device *pdev)
1813 {
1814 struct vpfe_subdev_info *sdinfo;
1815 struct vpfe_config *vpfe_cfg;
1816 struct resource *res1;
1817 struct vpfe_device *vpfe_dev;
1818 struct i2c_adapter *i2c_adap;
1819 struct video_device *vfd;
1820 int ret, i, j;
1821 int num_subdevs = 0;
1822
1823 /* Get the pointer to the device object */
1824 vpfe_dev = vpfe_initialize();
1825
1826 if (!vpfe_dev) {
1827 v4l2_err(pdev->dev.driver,
1828 "Failed to allocate memory for vpfe_dev\n");
1829 return -ENOMEM;
1830 }
1831
1832 vpfe_dev->pdev = &pdev->dev;
1833
1834 if (!pdev->dev.platform_data) {
1835 v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
1836 ret = -ENODEV;
1837 goto probe_free_dev_mem;
1838 }
1839
1840 vpfe_cfg = pdev->dev.platform_data;
1841 vpfe_dev->cfg = vpfe_cfg;
1842 if (!vpfe_cfg->ccdc || !vpfe_cfg->card_name || !vpfe_cfg->sub_devs) {
1843 v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
1844 ret = -ENOENT;
1845 goto probe_free_dev_mem;
1846 }
1847
1848 /* Allocate memory for ccdc configuration */
1849 ccdc_cfg = kmalloc(sizeof(*ccdc_cfg), GFP_KERNEL);
1850 if (!ccdc_cfg) {
1851 ret = -ENOMEM;
1852 goto probe_free_dev_mem;
1853 }
1854
1855 mutex_lock(&ccdc_lock);
1856
1857 strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
1858 /* Get VINT0 irq resource */
1859 res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1860 if (!res1) {
1861 v4l2_err(pdev->dev.driver,
1862 "Unable to get interrupt for VINT0\n");
1863 ret = -ENODEV;
1864 goto probe_free_ccdc_cfg_mem;
1865 }
1866 vpfe_dev->ccdc_irq0 = res1->start;
1867
1868 /* Get VINT1 irq resource */
1869 res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1870 if (!res1) {
1871 v4l2_err(pdev->dev.driver,
1872 "Unable to get interrupt for VINT1\n");
1873 ret = -ENODEV;
1874 goto probe_free_ccdc_cfg_mem;
1875 }
1876 vpfe_dev->ccdc_irq1 = res1->start;
1877
1878 ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, 0,
1879 "vpfe_capture0", vpfe_dev);
1880
1881 if (0 != ret) {
1882 v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
1883 goto probe_free_ccdc_cfg_mem;
1884 }
1885
1886 vfd = &vpfe_dev->video_dev;
1887 /* Initialize field of video device */
1888 vfd->release = video_device_release_empty;
1889 vfd->fops = &vpfe_fops;
1890 vfd->ioctl_ops = &vpfe_ioctl_ops;
1891 vfd->tvnorms = 0;
1892 vfd->v4l2_dev = &vpfe_dev->v4l2_dev;
1893 snprintf(vfd->name, sizeof(vfd->name),
1894 "%s_V%d.%d.%d",
1895 CAPTURE_DRV_NAME,
1896 (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
1897 (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
1898 (VPFE_CAPTURE_VERSION_CODE) & 0xff);
1899
1900 ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
1901 if (ret) {
1902 v4l2_err(pdev->dev.driver,
1903 "Unable to register v4l2 device.\n");
1904 goto probe_out_release_irq;
1905 }
1906 v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
1907 spin_lock_init(&vpfe_dev->irqlock);
1908 spin_lock_init(&vpfe_dev->dma_queue_lock);
1909 mutex_init(&vpfe_dev->lock);
1910
1911 /* Initialize field of the device objects */
1912 vpfe_dev->numbuffers = config_params.numbuffers;
1913
1914 /* register video device */
1915 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1916 "trying to register vpfe device.\n");
1917 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
1918 "video_dev=%p\n", &vpfe_dev->video_dev);
1919 vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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_array(num_subdevs,
1937 sizeof(*vpfe_dev->sd),
1938 GFP_KERNEL);
1939 if (!vpfe_dev->sd) {
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 ret = -ENXIO;
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_release_irq:
1989 free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
1990 probe_free_ccdc_cfg_mem:
1991 kfree(ccdc_cfg);
1992 mutex_unlock(&ccdc_lock);
1993 probe_free_dev_mem:
1994 kfree(vpfe_dev);
1995 return ret;
1996 }
1997
1998 /*
1999 * vpfe_remove : It un-register device from V4L2 driver
2000 */
2001 static int vpfe_remove(struct platform_device *pdev)
2002 {
2003 struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
2004
2005 v4l2_info(pdev->dev.driver, "vpfe_remove\n");
2006
2007 free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
2008 kfree(vpfe_dev->sd);
2009 v4l2_device_unregister(&vpfe_dev->v4l2_dev);
2010 video_unregister_device(&vpfe_dev->video_dev);
2011 kfree(vpfe_dev);
2012 kfree(ccdc_cfg);
2013 return 0;
2014 }
2015
2016 static int vpfe_suspend(struct device *dev)
2017 {
2018 return 0;
2019 }
2020
2021 static int vpfe_resume(struct device *dev)
2022 {
2023 return 0;
2024 }
2025
2026 static const struct dev_pm_ops vpfe_dev_pm_ops = {
2027 .suspend = vpfe_suspend,
2028 .resume = vpfe_resume,
2029 };
2030
2031 static struct platform_driver vpfe_driver = {
2032 .driver = {
2033 .name = CAPTURE_DRV_NAME,
2034 .pm = &vpfe_dev_pm_ops,
2035 },
2036 .probe = vpfe_probe,
2037 .remove = vpfe_remove,
2038 };
2039
2040 module_platform_driver(vpfe_driver);
Linux with added FPC-III support