aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/media/video/meye.c
blob: 3d51fa0a52b6132c6b09859c691c466e97e0964e (plain) (tree)
1
2
3
4
5
6
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787




                                                           
                                                   





















                                                                               

                         

                           
                              




                            
                              



















































































                                                                               
                                                               






















































































































































































































































































































































































































































































































































































































































































                                                                               
                                                  







































































































































                                                                                 
                                                                                           
                                       
                                       
                                                                             
                                                           
                                                                      
                                                    
                                                                        
                                                       
                                                                           

                                                         
                                         









                                             
                                       



                                                     
                                                 


                                                         
                                                         



                                                                                                       
                                                         






                                                                                     
                                         








                                                           
                                                                                           







                                                                         
                                       










                                                                   
                                                 






                                                                                
                                         






























                                                                           
                                       



                                                                  
                                                                            
                                                             
                                                                      
                                                       
                                                                          
                                                           
                                         
















                                                                   
                                       



                                                                        
                                         









                                             
                                       


                                                     
                                                 


                                                         
                                                         



                                                                                                       
                                                         







                                                                                     
                                         








                                                                 
                                       





                                                           
                                         









                                                                 
                                       






                                                                                 
                                         













































































































































                                                                           
                                       

                                         

                                                                                


                                                                 

                                                                         


                                                          

                                                                              


                                                               

                                                                           


                                                             

                                                                         


                                                   

                                                                               


                                                         

                                                                             








                                                         
                                                 

                                       
                                         





                                             
                                       




























                                                                 
                                                 

                                       
                                         































































































                                                                       
                                       
















                                                                   
                                         




















                                                                  
                                       


                                                            
                                                                 










                                                                          
                                                 



                                                  
                                         





































                                                                          
                                       



                                                                                 
                                         











                                                             
                                       
                                                                               
                                                 



                                                                               
                                                 



                                                                   
                                                 


                                                                     
                                                 











                                                                   
                                         



                               
                                       







                                                       
                                                 

                                       
                                         





                                
                                       




                                                                    
                                         
























                                                                    
                               


                                               
                                 




                                                    
                                              




                                                     
                                              














                                                                   
                               
                                         
                                         








                                                                                     
                                                 









                                                                                
                                                 















                                                                        
                                 


                 
                                                 




                                       
                                             







                                            





                                               
                                                                 






































                                                                          





































                                                                            
                                                                             






























                                                                            
                                                                         



                                                              

























                                                                          
                               














                                                    






                                                                          



                                                                             
                                                                    












                                                                 
                                                               































                                                                 
                                                               






































                                                                
                                                                       












                                                                      
/*
 * Motion Eye video4linux driver for Sony Vaio PictureBook
 *
 * Copyright (C) 2001-2004 Stelian Pop <stelian@popies.net>
 *
 * Copyright (C) 2001-2002 Alcôve <www.alcove.com>
 *
 * Copyright (C) 2000 Andrew Tridgell <tridge@valinux.com>
 *
 * Earlier work by Werner Almesberger, Paul `Rusty' Russell and Paul Mackerras.
 *
 * Some parts borrowed from various video4linux drivers, especially
 * bttv-driver.c and zoran.c, see original files for credits.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/dma-mapping.h>

#include "meye.h"
#include <linux/meye.h>

MODULE_AUTHOR("Stelian Pop <stelian@popies.net>");
MODULE_DESCRIPTION("v4l/v4l2 driver for the MotionEye camera");
MODULE_LICENSE("GPL");
MODULE_VERSION(MEYE_DRIVER_VERSION);

/* force usage of V4L1 API */
static int forcev4l1; /* = 0 */
module_param(forcev4l1, int, 0644);
MODULE_PARM_DESC(forcev4l1, "force use of V4L1 instead of V4L2");

/* number of grab buffers */
static unsigned int gbuffers = 2;
module_param(gbuffers, int, 0444);
MODULE_PARM_DESC(gbuffers, "number of capture buffers, default is 2 (32 max)");

/* size of a grab buffer */
static unsigned int gbufsize = MEYE_MAX_BUFSIZE;
module_param(gbufsize, int, 0444);
MODULE_PARM_DESC(gbufsize, "size of the capture buffers, default is 614400"
		 " (will be rounded up to a page multiple)");

/* /dev/videoX registration number */
static int video_nr = -1;
module_param(video_nr, int, 0444);
MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");

/* driver structure - only one possible */
static struct meye meye;

/****************************************************************************/
/* Memory allocation routines (stolen from bttv-driver.c)                   */
/****************************************************************************/
static void *rvmalloc(unsigned long size)
{
	void *mem;
	unsigned long adr;

	size = PAGE_ALIGN(size);
	mem = vmalloc_32(size);
	if (mem) {
		memset(mem, 0, size);
		adr = (unsigned long) mem;
		while (size > 0) {
			SetPageReserved(vmalloc_to_page((void *)adr));
			adr += PAGE_SIZE;
			size -= PAGE_SIZE;
		}
	}
	return mem;
}

static void rvfree(void * mem, unsigned long size)
{
	unsigned long adr;

	if (mem) {
		adr = (unsigned long) mem;
		while ((long) size > 0) {
			ClearPageReserved(vmalloc_to_page((void *)adr));
			adr += PAGE_SIZE;
			size -= PAGE_SIZE;
		}
		vfree(mem);
	}
}

/*
 * return a page table pointing to N pages of locked memory
 *
 * NOTE: The meye device expects DMA addresses on 32 bits, we build
 * a table of 1024 entries = 4 bytes * 1024 = 4096 bytes.
 */
static int ptable_alloc(void)
{
	u32 *pt;
	int i;

	memset(meye.mchip_ptable, 0, sizeof(meye.mchip_ptable));

	/* give only 32 bit DMA addresses */
	if (dma_set_mask(&meye.mchip_dev->dev, DMA_32BIT_MASK))
		return -1;

	meye.mchip_ptable_toc = dma_alloc_coherent(&meye.mchip_dev->dev,
						   PAGE_SIZE,
						   &meye.mchip_dmahandle,
						   GFP_KERNEL);
	if (!meye.mchip_ptable_toc) {
		meye.mchip_dmahandle = 0;
		return -1;
	}

	pt = meye.mchip_ptable_toc;
	for (i = 0; i < MCHIP_NB_PAGES; i++) {
		dma_addr_t dma;
		meye.mchip_ptable[i] = dma_alloc_coherent(&meye.mchip_dev->dev,
							  PAGE_SIZE,
							  &dma,
							  GFP_KERNEL);
		if (!meye.mchip_ptable[i]) {
			int j;
			pt = meye.mchip_ptable_toc;
			for (j = 0; j < i; ++j) {
				dma = (dma_addr_t) *pt;
				dma_free_coherent(&meye.mchip_dev->dev,
						  PAGE_SIZE,
						  meye.mchip_ptable[j], dma);
				pt++;
			}
			dma_free_coherent(&meye.mchip_dev->dev,
					  PAGE_SIZE,
					  meye.mchip_ptable_toc,
					  meye.mchip_dmahandle);
			meye.mchip_ptable_toc = NULL;
			meye.mchip_dmahandle = 0;
			return -1;
		}
		*pt = (u32) dma;
		pt++;
	}
	return 0;
}

static void ptable_free(void)
{
	u32 *pt;
	int i;

	pt = meye.mchip_ptable_toc;
	for (i = 0; i < MCHIP_NB_PAGES; i++) {
		dma_addr_t dma = (dma_addr_t) *pt;
		if (meye.mchip_ptable[i])
			dma_free_coherent(&meye.mchip_dev->dev,
					  PAGE_SIZE,
					  meye.mchip_ptable[i], dma);
		pt++;
	}

	if (meye.mchip_ptable_toc)
		dma_free_coherent(&meye.mchip_dev->dev,
				  PAGE_SIZE,
				  meye.mchip_ptable_toc,
				  meye.mchip_dmahandle);

	memset(meye.mchip_ptable, 0, sizeof(meye.mchip_ptable));
	meye.mchip_ptable_toc = NULL;
	meye.mchip_dmahandle = 0;
}

/* copy data from ptable into buf */
static void ptable_copy(u8 *buf, int start, int size, int pt_pages)
{
	int i;

	for (i = 0; i < (size / PAGE_SIZE) * PAGE_SIZE; i += PAGE_SIZE) {
		memcpy(buf + i, meye.mchip_ptable[start++], PAGE_SIZE);
		if (start >= pt_pages)
			start = 0;
	}
	memcpy(buf + i, meye.mchip_ptable[start], size % PAGE_SIZE);
}

/****************************************************************************/
/* JPEG tables at different qualities to load into the VRJ chip             */
/****************************************************************************/

/* return a set of quantisation tables based on a quality from 1 to 10 */
static u16 *jpeg_quantisation_tables(int *length, int quality)
{
	static u16 jpeg_tables[][70] = { {
		0xdbff, 0x4300, 0xff00, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff,
		0xdbff, 0x4300, 0xff01, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff,
	},
	{
		0xdbff, 0x4300, 0x5000, 0x3c37, 0x3c46, 0x5032, 0x4146, 0x5a46,
		0x5055, 0x785f, 0x82c8, 0x6e78, 0x786e, 0xaff5, 0x91b9, 0xffc8,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff,
		0xdbff, 0x4300, 0x5501, 0x5a5a, 0x6978, 0xeb78, 0x8282, 0xffeb,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
		0xffff, 0xffff, 0xffff,
	},
	{
		0xdbff, 0x4300, 0x2800, 0x1e1c, 0x1e23, 0x2819, 0x2123, 0x2d23,
		0x282b, 0x3c30, 0x4164, 0x373c, 0x3c37, 0x587b, 0x495d, 0x9164,
		0x9980, 0x8f96, 0x8c80, 0xa08a, 0xe6b4, 0xa0c3, 0xdaaa, 0x8aad,
		0xc88c, 0xcbff, 0xeeda, 0xfff5, 0xffff, 0xc19b, 0xffff, 0xfaff,
		0xe6ff, 0xfffd, 0xfff8,
		0xdbff, 0x4300, 0x2b01, 0x2d2d, 0x353c, 0x763c, 0x4141, 0xf876,
		0x8ca5, 0xf8a5, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
		0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
		0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8, 0xf8f8,
		0xf8f8, 0xf8f8, 0xfff8,
	},
	{
		0xdbff, 0x4300, 0x1b00, 0x1412, 0x1417, 0x1b11, 0x1617, 0x1e17,
		0x1b1c, 0x2820, 0x2b42, 0x2528, 0x2825, 0x3a51, 0x303d, 0x6042,
		0x6555, 0x5f64, 0x5d55, 0x6a5b, 0x9978, 0x6a81, 0x9071, 0x5b73,
		0x855d, 0x86b5, 0x9e90, 0xaba3, 0xabad, 0x8067, 0xc9bc, 0xa6ba,
		0x99c7, 0xaba8, 0xffa4,
		0xdbff, 0x4300, 0x1c01, 0x1e1e, 0x2328, 0x4e28, 0x2b2b, 0xa44e,
		0x5d6e, 0xa46e, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
		0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
		0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4, 0xa4a4,
		0xa4a4, 0xa4a4, 0xffa4,
	},
	{
		0xdbff, 0x4300, 0x1400, 0x0f0e, 0x0f12, 0x140d, 0x1012, 0x1712,
		0x1415, 0x1e18, 0x2132, 0x1c1e, 0x1e1c, 0x2c3d, 0x242e, 0x4932,
		0x4c40, 0x474b, 0x4640, 0x5045, 0x735a, 0x5062, 0x6d55, 0x4556,
		0x6446, 0x6588, 0x776d, 0x817b, 0x8182, 0x604e, 0x978d, 0x7d8c,
		0x7396, 0x817e, 0xff7c,
		0xdbff, 0x4300, 0x1501, 0x1717, 0x1a1e, 0x3b1e, 0x2121, 0x7c3b,
		0x4653, 0x7c53, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
		0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
		0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c, 0x7c7c,
		0x7c7c, 0x7c7c, 0xff7c,
	},
	{
		0xdbff, 0x4300, 0x1000, 0x0c0b, 0x0c0e, 0x100a, 0x0d0e, 0x120e,
		0x1011, 0x1813, 0x1a28, 0x1618, 0x1816, 0x2331, 0x1d25, 0x3a28,
		0x3d33, 0x393c, 0x3833, 0x4037, 0x5c48, 0x404e, 0x5744, 0x3745,
		0x5038, 0x516d, 0x5f57, 0x6762, 0x6768, 0x4d3e, 0x7971, 0x6470,
		0x5c78, 0x6765, 0xff63,
		0xdbff, 0x4300, 0x1101, 0x1212, 0x1518, 0x2f18, 0x1a1a, 0x632f,
		0x3842, 0x6342, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
		0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
		0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363, 0x6363,
		0x6363, 0x6363, 0xff63,
	},
	{
		0xdbff, 0x4300, 0x0d00, 0x0a09, 0x0a0b, 0x0d08, 0x0a0b, 0x0e0b,
		0x0d0e, 0x130f, 0x1520, 0x1213, 0x1312, 0x1c27, 0x171e, 0x2e20,
		0x3129, 0x2e30, 0x2d29, 0x332c, 0x4a3a, 0x333e, 0x4636, 0x2c37,
		0x402d, 0x4157, 0x4c46, 0x524e, 0x5253, 0x3e32, 0x615a, 0x505a,
		0x4a60, 0x5251, 0xff4f,
		0xdbff, 0x4300, 0x0e01, 0x0e0e, 0x1113, 0x2613, 0x1515, 0x4f26,
		0x2d35, 0x4f35, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
		0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
		0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f, 0x4f4f,
		0x4f4f, 0x4f4f, 0xff4f,
	},
	{
		0xdbff, 0x4300, 0x0a00, 0x0707, 0x0708, 0x0a06, 0x0808, 0x0b08,
		0x0a0a, 0x0e0b, 0x1018, 0x0d0e, 0x0e0d, 0x151d, 0x1116, 0x2318,
		0x251f, 0x2224, 0x221f, 0x2621, 0x372b, 0x262f, 0x3429, 0x2129,
		0x3022, 0x3141, 0x3934, 0x3e3b, 0x3e3e, 0x2e25, 0x4944, 0x3c43,
		0x3748, 0x3e3d, 0xff3b,
		0xdbff, 0x4300, 0x0a01, 0x0b0b, 0x0d0e, 0x1c0e, 0x1010, 0x3b1c,
		0x2228, 0x3b28, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
		0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
		0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b, 0x3b3b,
		0x3b3b, 0x3b3b, 0xff3b,
	},
	{
		0xdbff, 0x4300, 0x0600, 0x0504, 0x0506, 0x0604, 0x0506, 0x0706,
		0x0607, 0x0a08, 0x0a10, 0x090a, 0x0a09, 0x0e14, 0x0c0f, 0x1710,
		0x1814, 0x1718, 0x1614, 0x1a16, 0x251d, 0x1a1f, 0x231b, 0x161c,
		0x2016, 0x202c, 0x2623, 0x2927, 0x292a, 0x1f19, 0x302d, 0x282d,
		0x2530, 0x2928, 0xff28,
		0xdbff, 0x4300, 0x0701, 0x0707, 0x080a, 0x130a, 0x0a0a, 0x2813,
		0x161a, 0x281a, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
		0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
		0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828, 0x2828,
		0x2828, 0x2828, 0xff28,
	},
	{
		0xdbff, 0x4300, 0x0300, 0x0202, 0x0203, 0x0302, 0x0303, 0x0403,
		0x0303, 0x0504, 0x0508, 0x0405, 0x0504, 0x070a, 0x0607, 0x0c08,
		0x0c0a, 0x0b0c, 0x0b0a, 0x0d0b, 0x120e, 0x0d10, 0x110e, 0x0b0e,
		0x100b, 0x1016, 0x1311, 0x1514, 0x1515, 0x0f0c, 0x1817, 0x1416,
		0x1218, 0x1514, 0xff14,
		0xdbff, 0x4300, 0x0301, 0x0404, 0x0405, 0x0905, 0x0505, 0x1409,
		0x0b0d, 0x140d, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
		0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
		0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414, 0x1414,
		0x1414, 0x1414, 0xff14,
	},
	{
		0xdbff, 0x4300, 0x0100, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0xff01,
		0xdbff, 0x4300, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0101, 0x0101, 0xff01,
	} };

	if (quality < 0 || quality > 10) {
		printk(KERN_WARNING
		       "meye: invalid quality level %d - using 8\n", quality);
		quality = 8;
	}

	*length = ARRAY_SIZE(jpeg_tables[quality]);
	return jpeg_tables[quality];
}

/* return a generic set of huffman tables */
static u16 *jpeg_huffman_tables(int *length)
{
	static u16 tables[] = {
		0xC4FF, 0xB500, 0x0010, 0x0102, 0x0303, 0x0402, 0x0503, 0x0405,
		0x0004, 0x0100, 0x017D, 0x0302, 0x0400, 0x0511, 0x2112, 0x4131,
		0x1306, 0x6151, 0x2207, 0x1471, 0x8132, 0xA191, 0x2308, 0xB142,
		0x15C1, 0xD152, 0x24F0, 0x6233, 0x8272, 0x0A09, 0x1716, 0x1918,
		0x251A, 0x2726, 0x2928, 0x342A, 0x3635, 0x3837, 0x3A39, 0x4443,
		0x4645, 0x4847, 0x4A49, 0x5453, 0x5655, 0x5857, 0x5A59, 0x6463,
		0x6665, 0x6867, 0x6A69, 0x7473, 0x7675, 0x7877, 0x7A79, 0x8483,
		0x8685, 0x8887, 0x8A89, 0x9392, 0x9594, 0x9796, 0x9998, 0xA29A,
		0xA4A3, 0xA6A5, 0xA8A7, 0xAAA9, 0xB3B2, 0xB5B4, 0xB7B6, 0xB9B8,
		0xC2BA, 0xC4C3, 0xC6C5, 0xC8C7, 0xCAC9, 0xD3D2, 0xD5D4, 0xD7D6,
		0xD9D8, 0xE1DA, 0xE3E2, 0xE5E4, 0xE7E6, 0xE9E8, 0xF1EA, 0xF3F2,
		0xF5F4, 0xF7F6, 0xF9F8, 0xFFFA,
		0xC4FF, 0xB500, 0x0011, 0x0102, 0x0402, 0x0304, 0x0704, 0x0405,
		0x0004, 0x0201, 0x0077, 0x0201, 0x1103, 0x0504, 0x3121, 0x1206,
		0x5141, 0x6107, 0x1371, 0x3222, 0x0881, 0x4214, 0xA191, 0xC1B1,
		0x2309, 0x5233, 0x15F0, 0x7262, 0x0AD1, 0x2416, 0xE134, 0xF125,
		0x1817, 0x1A19, 0x2726, 0x2928, 0x352A, 0x3736, 0x3938, 0x433A,
		0x4544, 0x4746, 0x4948, 0x534A, 0x5554, 0x5756, 0x5958, 0x635A,
		0x6564, 0x6766, 0x6968, 0x736A, 0x7574, 0x7776, 0x7978, 0x827A,
		0x8483, 0x8685, 0x8887, 0x8A89, 0x9392, 0x9594, 0x9796, 0x9998,
		0xA29A, 0xA4A3, 0xA6A5, 0xA8A7, 0xAAA9, 0xB3B2, 0xB5B4, 0xB7B6,
		0xB9B8, 0xC2BA, 0xC4C3, 0xC6C5, 0xC8C7, 0xCAC9, 0xD3D2, 0xD5D4,
		0xD7D6, 0xD9D8, 0xE2DA, 0xE4E3, 0xE6E5, 0xE8E7, 0xEAE9, 0xF3F2,
		0xF5F4, 0xF7F6, 0xF9F8, 0xFFFA,
		0xC4FF, 0x1F00, 0x0000, 0x0501, 0x0101, 0x0101, 0x0101, 0x0000,
		0x0000, 0x0000, 0x0000, 0x0201, 0x0403, 0x0605, 0x0807, 0x0A09,
		0xFF0B,
		0xC4FF, 0x1F00, 0x0001, 0x0103, 0x0101, 0x0101, 0x0101, 0x0101,
		0x0000, 0x0000, 0x0000, 0x0201, 0x0403, 0x0605, 0x0807, 0x0A09,
		0xFF0B
	};

	*length = ARRAY_SIZE(tables);
	return tables;
}

/****************************************************************************/
/* MCHIP low-level functions                                                */
/****************************************************************************/

/* returns the horizontal capture size */
static inline int mchip_hsize(void)
{
	return meye.params.subsample ? 320 : 640;
}

/* returns the vertical capture size */
static inline int mchip_vsize(void)
{
	return meye.params.subsample ? 240 : 480;
}

/* waits for a register to be available */
static void mchip_sync(int reg)
{
	u32 status;
	int i;

	if (reg == MCHIP_MM_FIFO_DATA) {
		for (i = 0; i < MCHIP_REG_TIMEOUT; i++) {
			status = readl(meye.mchip_mmregs +
				       MCHIP_MM_FIFO_STATUS);
			if (!(status & MCHIP_MM_FIFO_WAIT)) {
				printk(KERN_WARNING "meye: fifo not ready\n");
				return;
			}
			if (status & MCHIP_MM_FIFO_READY)
				return;
			udelay(1);
		}
	} else if (reg > 0x80) {
		u32 mask = (reg < 0x100) ? MCHIP_HIC_STATUS_MCC_RDY
					 : MCHIP_HIC_STATUS_VRJ_RDY;
		for (i = 0; i < MCHIP_REG_TIMEOUT; i++) {
			status = readl(meye.mchip_mmregs + MCHIP_HIC_STATUS);
			if (status & mask)
				return;
			udelay(1);
		}
	} else
		return;
	printk(KERN_WARNING
	       "meye: mchip_sync() timeout on reg 0x%x status=0x%x\n",
	       reg, status);
}

/* sets a value into the register */
static inline void mchip_set(int reg, u32 v)
{
	mchip_sync(reg);
	writel(v, meye.mchip_mmregs + reg);
}

/* get the register value */
static inline u32 mchip_read(int reg)
{
	mchip_sync(reg);
	return readl(meye.mchip_mmregs + reg);
}

/* wait for a register to become a particular value */
static inline int mchip_delay(u32 reg, u32 v)
{
	int n = 10;
	while (--n && mchip_read(reg) != v)
		udelay(1);
	return n;
}

/* setup subsampling */
static void mchip_subsample(void)
{
	mchip_set(MCHIP_MCC_R_SAMPLING, meye.params.subsample);
	mchip_set(MCHIP_MCC_R_XRANGE, mchip_hsize());
	mchip_set(MCHIP_MCC_R_YRANGE, mchip_vsize());
	mchip_set(MCHIP_MCC_B_XRANGE, mchip_hsize());
	mchip_set(MCHIP_MCC_B_YRANGE, mchip_vsize());
	mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);
}

/* set the framerate into the mchip */
static void mchip_set_framerate(void)
{
	mchip_set(MCHIP_HIC_S_RATE, meye.params.framerate);
}

/* load some huffman and quantisation tables into the VRJ chip ready
   for JPEG compression */
static void mchip_load_tables(void)
{
	int i;
	int length;
	u16 *tables;

	tables = jpeg_huffman_tables(&length);
	for (i = 0; i < length; i++)
		writel(tables[i], meye.mchip_mmregs + MCHIP_VRJ_TABLE_DATA);

	tables = jpeg_quantisation_tables(&length, meye.params.quality);
	for (i = 0; i < length; i++)
		writel(tables[i], meye.mchip_mmregs + MCHIP_VRJ_TABLE_DATA);
}

/* setup the VRJ parameters in the chip */
static void mchip_vrj_setup(u8 mode)
{
	mchip_set(MCHIP_VRJ_BUS_MODE, 5);
	mchip_set(MCHIP_VRJ_SIGNAL_ACTIVE_LEVEL, 0x1f);
	mchip_set(MCHIP_VRJ_PDAT_USE, 1);
	mchip_set(MCHIP_VRJ_IRQ_FLAG, 0xa0);
	mchip_set(MCHIP_VRJ_MODE_SPECIFY, mode);
	mchip_set(MCHIP_VRJ_NUM_LINES, mchip_vsize());
	mchip_set(MCHIP_VRJ_NUM_PIXELS, mchip_hsize());
	mchip_set(MCHIP_VRJ_NUM_COMPONENTS, 0x1b);
	mchip_set(MCHIP_VRJ_LIMIT_COMPRESSED_LO, 0xFFFF);
	mchip_set(MCHIP_VRJ_LIMIT_COMPRESSED_HI, 0xFFFF);
	mchip_set(MCHIP_VRJ_COMP_DATA_FORMAT, 0xC);
	mchip_set(MCHIP_VRJ_RESTART_INTERVAL, 0);
	mchip_set(MCHIP_VRJ_SOF1, 0x601);
	mchip_set(MCHIP_VRJ_SOF2, 0x1502);
	mchip_set(MCHIP_VRJ_SOF3, 0x1503);
	mchip_set(MCHIP_VRJ_SOF4, 0x1596);
	mchip_set(MCHIP_VRJ_SOS, 0x0ed0);

	mchip_load_tables();
}

/* sets the DMA parameters into the chip */
static void mchip_dma_setup(dma_addr_t dma_addr)
{
	int i;

	mchip_set(MCHIP_MM_PT_ADDR, (u32)dma_addr);
	for (i = 0; i < 4; i++)
		mchip_set(MCHIP_MM_FIR(i), 0);
	meye.mchip_fnum = 0;
}

/* setup for DMA transfers - also zeros the framebuffer */
static int mchip_dma_alloc(void)
{
	if (!meye.mchip_dmahandle)
		if (ptable_alloc())
			return -1;
	return 0;
}

/* frees the DMA buffer */
static void mchip_dma_free(void)
{
	if (meye.mchip_dmahandle) {
		mchip_dma_setup(0);
		ptable_free();
	}
}

/* stop any existing HIC action and wait for any dma to complete then
   reset the dma engine */
static void mchip_hic_stop(void)
{
	int i, j;

	meye.mchip_mode = MCHIP_HIC_MODE_NOOP;
	if (!(mchip_read(MCHIP_HIC_STATUS) & MCHIP_HIC_STATUS_BUSY))
		return;
	for (i = 0; i < 20; ++i) {
		mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_STOP);
		mchip_delay(MCHIP_HIC_CMD, 0);
		for (j = 0; j < 100; ++j) {
			if (mchip_delay(MCHIP_HIC_STATUS,
					MCHIP_HIC_STATUS_IDLE))
				return;
			msleep(1);
		}
		printk(KERN_ERR "meye: need to reset HIC!\n");

		mchip_set(MCHIP_HIC_CTL, MCHIP_HIC_CTL_SOFT_RESET);
		msleep(250);
	}
	printk(KERN_ERR "meye: resetting HIC hanged!\n");
}

/****************************************************************************/
/* MCHIP frame processing functions                                         */
/****************************************************************************/

/* get the next ready frame from the dma engine */
static u32 mchip_get_frame(void)
{
	u32 v;

	v = mchip_read(MCHIP_MM_FIR(meye.mchip_fnum));
	return v;
}

/* frees the current frame from the dma engine */
static void mchip_free_frame(void)
{
	mchip_set(MCHIP_MM_FIR(meye.mchip_fnum), 0);
	meye.mchip_fnum++;
	meye.mchip_fnum %= 4;
}

/* read one frame from the framebuffer assuming it was captured using
   a uncompressed transfer */
static void mchip_cont_read_frame(u32 v, u8 *buf, int size)
{
	int pt_id;

	pt_id = (v >> 17) & 0x3FF;

	ptable_copy(buf, pt_id, size, MCHIP_NB_PAGES);
}

/* read a compressed frame from the framebuffer */
static int mchip_comp_read_frame(u32 v, u8 *buf, int size)
{
	int pt_start, pt_end, trailer;
	int fsize;
	int i;

	pt_start = (v >> 19) & 0xFF;
	pt_end = (v >> 11) & 0xFF;
	trailer = (v >> 1) & 0x3FF;

	if (pt_end < pt_start)
		fsize = (MCHIP_NB_PAGES_MJPEG - pt_start) * PAGE_SIZE +
			pt_end * PAGE_SIZE + trailer * 4;
	else
		fsize = (pt_end - pt_start) * PAGE_SIZE + trailer * 4;

	if (fsize > size) {
		printk(KERN_WARNING "meye: oversized compressed frame %d\n",
		       fsize);
		return -1;
	}

	ptable_copy(buf, pt_start, fsize, MCHIP_NB_PAGES_MJPEG);

#ifdef MEYE_JPEG_CORRECTION

	/* Some mchip generated jpeg frames are incorrect. In most
	 * (all ?) of those cases, the final EOI (0xff 0xd9) marker
	 * is not present at the end of the frame.
	 *
	 * Since adding the final marker is not enough to restore
	 * the jpeg integrity, we drop the frame.
	 */

	for (i = fsize - 1; i > 0 && buf[i] == 0xff; i--) ;

	if (i < 2 || buf[i - 1] != 0xff || buf[i] != 0xd9)
		return -1;

#endif

	return fsize;
}

/* take a picture into SDRAM */
static void mchip_take_picture(void)
{
	int i;

	mchip_hic_stop();
	mchip_subsample();
	mchip_dma_setup(meye.mchip_dmahandle);

	mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_CAP);
	mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

	mchip_delay(MCHIP_HIC_CMD, 0);

	for (i = 0; i < 100; ++i) {
		if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
			break;
		msleep(1);
	}
}

/* dma a previously taken picture into a buffer */
static void mchip_get_picture(u8 *buf, int bufsize)
{
	u32 v;
	int i;

	mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_OUT);
	mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

	mchip_delay(MCHIP_HIC_CMD, 0);
	for (i = 0; i < 100; ++i) {
		if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
			break;
		msleep(1);
	}
	for (i = 0; i < 4; ++i) {
		v = mchip_get_frame();
		if (v & MCHIP_MM_FIR_RDY) {
			mchip_cont_read_frame(v, buf, bufsize);
			break;
		}
		mchip_free_frame();
	}
}

/* start continuous dma capture */
static void mchip_continuous_start(void)
{
	mchip_hic_stop();
	mchip_subsample();
	mchip_set_framerate();
	mchip_dma_setup(meye.mchip_dmahandle);

	meye.mchip_mode = MCHIP_HIC_MODE_CONT_OUT;

	mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_CONT_OUT);
	mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

	mchip_delay(MCHIP_HIC_CMD, 0);
}

/* compress one frame into a buffer */
static int mchip_compress_frame(u8 *buf, int bufsize)
{
	u32 v;
	int len = -1, i;

	mchip_vrj_setup(0x3f);
	udelay(50);

	mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_COMP);
	mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

	mchip_delay(MCHIP_HIC_CMD, 0);
	for (i = 0; i < 100; ++i) {
		if (mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE))
			break;
		msleep(1);
	}

	for (i = 0; i < 4; ++i) {
		v = mchip_get_frame();
		if (v & MCHIP_MM_FIR_RDY) {
			len = mchip_comp_read_frame(v, buf, bufsize);
			break;
		}
		mchip_free_frame();
	}
	return len;
}

#if 0
/* uncompress one image into a buffer */
static int mchip_uncompress_frame(u8 *img, int imgsize, u8 *buf, int bufsize)
{
	mchip_vrj_setup(0x3f);
	udelay(50);

	mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_STILL_DECOMP);
	mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

	mchip_delay(MCHIP_HIC_CMD, 0);

	return mchip_comp_read_frame(buf, bufsize);
}
#endif

/* start continuous compressed capture */
static void mchip_cont_compression_start(void)
{
	mchip_hic_stop();
	mchip_vrj_setup(0x3f);
	mchip_subsample();
	mchip_set_framerate();
	mchip_dma_setup(meye.mchip_dmahandle);

	meye.mchip_mode = MCHIP_HIC_MODE_CONT_COMP;

	mchip_set(MCHIP_HIC_MODE, MCHIP_HIC_MODE_CONT_COMP);
	mchip_set(MCHIP_HIC_CMD, MCHIP_HIC_CMD_START);

	mchip_delay(MCHIP_HIC_CMD, 0);
}

/****************************************************************************/
/* Interrupt handling                                                       */
/****************************************************************************/

static irqreturn_t meye_irq(int irq, void *dev_id)
{
	u32 v;
	int reqnr;
	static int sequence = 0;

	v = mchip_read(MCHIP_MM_INTA);

	if (meye.mchip_mode != MCHIP_HIC_MODE_CONT_OUT &&
	    meye.mchip_mode != MCHIP_HIC_MODE_CONT_COMP)
		return IRQ_NONE;

again:
	v = mchip_get_frame();
	if (!(v & MCHIP_MM_FIR_RDY))
		return IRQ_HANDLED;

	if (meye.mchip_mode == MCHIP_HIC_MODE_CONT_OUT) {
		if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
			      sizeof(int)) != sizeof(int)) {
			mchip_free_frame();
			return IRQ_HANDLED;
		}
		mchip_cont_read_frame(v, meye.grab_fbuffer + gbufsize * reqnr,
				      mchip_hsize() * mchip_vsize() * 2);
		meye.grab_buffer[reqnr].size = mchip_hsize() * mchip_vsize() * 2;
		meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
		do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
		meye.grab_buffer[reqnr].sequence = sequence++;
		kfifo_put(meye.doneq, (unsigned char *)&reqnr, sizeof(int));
		wake_up_interruptible(&meye.proc_list);
	} else {
		int size;
		size = mchip_comp_read_frame(v, meye.grab_temp, gbufsize);
		if (size == -1) {
			mchip_free_frame();
			goto again;
		}
		if (kfifo_get(meye.grabq, (unsigned char *)&reqnr,
			      sizeof(int)) != sizeof(int)) {
			mchip_free_frame();
			goto again;
		}
		memcpy(meye.grab_fbuffer + gbufsize * reqnr, meye.grab_temp,
		       size);
		meye.grab_buffer[reqnr].size = size;
		meye.grab_buffer[reqnr].state = MEYE_BUF_DONE;
		do_gettimeofday(&meye.grab_buffer[reqnr].timestamp);
		meye.grab_buffer[reqnr].sequence = sequence++;
		kfifo_put(meye.doneq, (unsigned char *)&reqnr, sizeof(int));
		wake_up_interruptible(&meye.proc_list);
	}
	mchip_free_frame();
	goto again;
}

/****************************************************************************/
/* video4linux integration                                                  */
/****************************************************************************/

static int meye_open(struct inode *inode, struct file *file)
{
	int i, err;

	err = video_exclusive_open(inode, file);
	if (err < 0)
		return err;

	mchip_hic_stop();

	if (mchip_dma_alloc()) {
		printk(KERN_ERR "meye: mchip framebuffer allocation failed\n");
		video_exclusive_release(inode, file);
		return -ENOBUFS;
	}

	for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
		meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
	kfifo_reset(meye.grabq);
	kfifo_reset(meye.doneq);
	return 0;
}

static int meye_release(struct inode *inode, struct file *file)
{
	mchip_hic_stop();
	mchip_dma_free();
	video_exclusive_release(inode, file);
	return 0;
}

static int meye_do_ioctl(struct inode *inode, struct file *file,
			 unsigned int cmd, void *arg)
{
	switch (cmd) {

	case VIDIOCGCAP: {
		struct video_capability *b = arg;
		strcpy(b->name,meye.video_dev->name);
		b->type = VID_TYPE_CAPTURE;
		b->channels = 1;
		b->audios = 0;
		b->maxwidth = 640;
		b->maxheight = 480;
		b->minwidth = 320;
		b->minheight = 240;
		break;
	}

	case VIDIOCGCHAN: {
		struct video_channel *v = arg;
		v->flags = 0;
		v->tuners = 0;
		v->type = VIDEO_TYPE_CAMERA;
		if (v->channel != 0)
			return -EINVAL;
		strcpy(v->name,"Camera");
		break;
	}

	case VIDIOCSCHAN: {
		struct video_channel *v = arg;
		if (v->channel != 0)
			return -EINVAL;
		break;
	}

	case VIDIOCGPICT: {
		struct video_picture *p = arg;
		*p = meye.picture;
		break;
	}

	case VIDIOCSPICT: {
		struct video_picture *p = arg;
		if (p->depth != 16)
			return -EINVAL;
		if (p->palette != VIDEO_PALETTE_YUV422 && p->palette != VIDEO_PALETTE_YUYV)
			return -EINVAL;
		mutex_lock(&meye.lock);
		sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERABRIGHTNESS,
				      p->brightness >> 10);
		sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAHUE,
				      p->hue >> 10);
		sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACOLOR,
				      p->colour >> 10);
		sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACONTRAST,
				      p->contrast >> 10);
		meye.picture = *p;
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOCSYNC: {
		int *i = arg;
		int unused;

		if (*i < 0 || *i >= gbuffers)
			return -EINVAL;

		mutex_lock(&meye.lock);

		switch (meye.grab_buffer[*i].state) {

		case MEYE_BUF_UNUSED:
			mutex_unlock(&meye.lock);
			return -EINVAL;
		case MEYE_BUF_USING:
			if (file->f_flags & O_NONBLOCK) {
				mutex_unlock(&meye.lock);
				return -EAGAIN;
			}
			if (wait_event_interruptible(meye.proc_list,
						     (meye.grab_buffer[*i].state != MEYE_BUF_USING))) {
				mutex_unlock(&meye.lock);
				return -EINTR;
			}
			/* fall through */
		case MEYE_BUF_DONE:
			meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
			kfifo_get(meye.doneq, (unsigned char *)&unused, sizeof(int));
		}
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOCMCAPTURE: {
		struct video_mmap *vm = arg;
		int restart = 0;

		if (vm->frame >= gbuffers || vm->frame < 0)
			return -EINVAL;
		if (vm->format != VIDEO_PALETTE_YUV422 && vm->format != VIDEO_PALETTE_YUYV)
			return -EINVAL;
		if (vm->height * vm->width * 2 > gbufsize)
			return -EINVAL;
		if (!meye.grab_fbuffer)
			return -EINVAL;
		if (meye.grab_buffer[vm->frame].state != MEYE_BUF_UNUSED)
			return -EBUSY;

		mutex_lock(&meye.lock);
		if (vm->width == 640 && vm->height == 480) {
			if (meye.params.subsample) {
				meye.params.subsample = 0;
				restart = 1;
			}
		} else if (vm->width == 320 && vm->height == 240) {
			if (!meye.params.subsample) {
				meye.params.subsample = 1;
				restart = 1;
			}
		} else {
			mutex_unlock(&meye.lock);
			return -EINVAL;
		}

		if (restart || meye.mchip_mode != MCHIP_HIC_MODE_CONT_OUT)
			mchip_continuous_start();
		meye.grab_buffer[vm->frame].state = MEYE_BUF_USING;
		kfifo_put(meye.grabq, (unsigned char *)&vm->frame, sizeof(int));
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOCGMBUF: {
		struct video_mbuf *vm = arg;
		int i;

		memset(vm, 0 , sizeof(*vm));
		vm->size = gbufsize * gbuffers;
		vm->frames = gbuffers;
		for (i = 0; i < gbuffers; i++)
			vm->offsets[i] = i * gbufsize;
		break;
	}

	case MEYEIOC_G_PARAMS: {
		struct meye_params *p = arg;
		*p = meye.params;
		break;
	}

	case MEYEIOC_S_PARAMS: {
		struct meye_params *jp = arg;
		if (jp->subsample > 1)
			return -EINVAL;
		if (jp->quality > 10)
			return -EINVAL;
		if (jp->sharpness > 63 || jp->agc > 63 || jp->picture > 63)
			return -EINVAL;
		if (jp->framerate > 31)
			return -EINVAL;
		mutex_lock(&meye.lock);
		if (meye.params.subsample != jp->subsample ||
		    meye.params.quality != jp->quality)
			mchip_hic_stop();	/* need restart */
		meye.params = *jp;
		sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERASHARPNESS,
				      meye.params.sharpness);
		sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAAGC,
				      meye.params.agc);
		sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAPICTURE,
				      meye.params.picture);
		mutex_unlock(&meye.lock);
		break;
	}

	case MEYEIOC_QBUF_CAPT: {
		int *nb = arg;

		if (!meye.grab_fbuffer)
			return -EINVAL;
		if (*nb >= gbuffers)
			return -EINVAL;
		if (*nb < 0) {
			/* stop capture */
			mchip_hic_stop();
			return 0;
		}
		if (meye.grab_buffer[*nb].state != MEYE_BUF_UNUSED)
			return -EBUSY;
		mutex_lock(&meye.lock);
		if (meye.mchip_mode != MCHIP_HIC_MODE_CONT_COMP)
			mchip_cont_compression_start();
		meye.grab_buffer[*nb].state = MEYE_BUF_USING;
		kfifo_put(meye.grabq, (unsigned char *)nb, sizeof(int));
		mutex_unlock(&meye.lock);
		break;
	}

	case MEYEIOC_SYNC: {
		int *i = arg;
		int unused;

		if (*i < 0 || *i >= gbuffers)
			return -EINVAL;

		mutex_lock(&meye.lock);
		switch (meye.grab_buffer[*i].state) {

		case MEYE_BUF_UNUSED:
			mutex_unlock(&meye.lock);
			return -EINVAL;
		case MEYE_BUF_USING:
			if (file->f_flags & O_NONBLOCK) {
				mutex_unlock(&meye.lock);
				return -EAGAIN;
			}
			if (wait_event_interruptible(meye.proc_list,
						     (meye.grab_buffer[*i].state != MEYE_BUF_USING))) {
				mutex_unlock(&meye.lock);
				return -EINTR;
			}
			/* fall through */
		case MEYE_BUF_DONE:
			meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
			kfifo_get(meye.doneq, (unsigned char *)&unused, sizeof(int));
		}
		*i = meye.grab_buffer[*i].size;
		mutex_unlock(&meye.lock);
		break;
	}

	case MEYEIOC_STILLCAPT: {

		if (!meye.grab_fbuffer)
			return -EINVAL;
		if (meye.grab_buffer[0].state != MEYE_BUF_UNUSED)
			return -EBUSY;
		mutex_lock(&meye.lock);
		meye.grab_buffer[0].state = MEYE_BUF_USING;
		mchip_take_picture();
		mchip_get_picture(
			meye.grab_fbuffer,
			mchip_hsize() * mchip_vsize() * 2);
		meye.grab_buffer[0].state = MEYE_BUF_DONE;
		mutex_unlock(&meye.lock);
		break;
	}

	case MEYEIOC_STILLJCAPT: {
		int *len = arg;

		if (!meye.grab_fbuffer)
			return -EINVAL;
		if (meye.grab_buffer[0].state != MEYE_BUF_UNUSED)
			return -EBUSY;
		mutex_lock(&meye.lock);
		meye.grab_buffer[0].state = MEYE_BUF_USING;
		*len = -1;
		while (*len == -1) {
			mchip_take_picture();
			*len = mchip_compress_frame(meye.grab_fbuffer, gbufsize);
		}
		meye.grab_buffer[0].state = MEYE_BUF_DONE;
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOC_QUERYCAP: {
		struct v4l2_capability *cap = arg;

		if (forcev4l1)
			return -EINVAL;

		memset(cap, 0, sizeof(*cap));
		strcpy(cap->driver, "meye");
		strcpy(cap->card, "meye");
		sprintf(cap->bus_info, "PCI:%s", pci_name(meye.mchip_dev));
		cap->version = (MEYE_DRIVER_MAJORVERSION << 8) +
			       MEYE_DRIVER_MINORVERSION;
		cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
				    V4L2_CAP_STREAMING;
		break;
	}

	case VIDIOC_ENUMINPUT: {
		struct v4l2_input *i = arg;

		if (i->index != 0)
			return -EINVAL;
		memset(i, 0, sizeof(*i));
		i->index = 0;
		strcpy(i->name, "Camera");
		i->type = V4L2_INPUT_TYPE_CAMERA;
		break;
	}

	case VIDIOC_G_INPUT: {
		int *i = arg;

		*i = 0;
		break;
	}

	case VIDIOC_S_INPUT: {
		int *i = arg;

		if (*i != 0)
			return -EINVAL;
		break;
	}

	case VIDIOC_QUERYCTRL: {
		struct v4l2_queryctrl *c = arg;

		switch (c->id) {

		case V4L2_CID_BRIGHTNESS:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Brightness");
			c->minimum = 0;
			c->maximum = 63;
			c->step = 1;
			c->default_value = 32;
			c->flags = 0;
			break;
		case V4L2_CID_HUE:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Hue");
			c->minimum = 0;
			c->maximum = 63;
			c->step = 1;
			c->default_value = 32;
			c->flags = 0;
			break;
		case V4L2_CID_CONTRAST:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Contrast");
			c->minimum = 0;
			c->maximum = 63;
			c->step = 1;
			c->default_value = 32;
			c->flags = 0;
			break;
		case V4L2_CID_SATURATION:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Saturation");
			c->minimum = 0;
			c->maximum = 63;
			c->step = 1;
			c->default_value = 32;
			c->flags = 0;
			break;
		case V4L2_CID_AGC:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Agc");
			c->minimum = 0;
			c->maximum = 63;
			c->step = 1;
			c->default_value = 48;
			c->flags = 0;
			break;
		case V4L2_CID_SHARPNESS:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Sharpness");
			c->minimum = 0;
			c->maximum = 63;
			c->step = 1;
			c->default_value = 32;
			c->flags = 0;
			break;
		case V4L2_CID_PICTURE:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Picture");
			c->minimum = 0;
			c->maximum = 63;
			c->step = 1;
			c->default_value = 0;
			c->flags = 0;
			break;
		case V4L2_CID_JPEGQUAL:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "JPEG quality");
			c->minimum = 0;
			c->maximum = 10;
			c->step = 1;
			c->default_value = 8;
			c->flags = 0;
			break;
		case V4L2_CID_FRAMERATE:
			c->type = V4L2_CTRL_TYPE_INTEGER;
			strcpy(c->name, "Framerate");
			c->minimum = 0;
			c->maximum = 31;
			c->step = 1;
			c->default_value = 0;
			c->flags = 0;
			break;
		default:
			return -EINVAL;
		}
		break;
	}

	case VIDIOC_S_CTRL: {
		struct v4l2_control *c = arg;

		mutex_lock(&meye.lock);
		switch (c->id) {
		case V4L2_CID_BRIGHTNESS:
			sony_pic_camera_command(
				SONY_PIC_COMMAND_SETCAMERABRIGHTNESS, c->value);
			meye.picture.brightness = c->value << 10;
			break;
		case V4L2_CID_HUE:
			sony_pic_camera_command(
				SONY_PIC_COMMAND_SETCAMERAHUE, c->value);
			meye.picture.hue = c->value << 10;
			break;
		case V4L2_CID_CONTRAST:
			sony_pic_camera_command(
				SONY_PIC_COMMAND_SETCAMERACONTRAST, c->value);
			meye.picture.contrast = c->value << 10;
			break;
		case V4L2_CID_SATURATION:
			sony_pic_camera_command(
				SONY_PIC_COMMAND_SETCAMERACOLOR, c->value);
			meye.picture.colour = c->value << 10;
			break;
		case V4L2_CID_AGC:
			sony_pic_camera_command(
				SONY_PIC_COMMAND_SETCAMERAAGC, c->value);
			meye.params.agc = c->value;
			break;
		case V4L2_CID_SHARPNESS:
			sony_pic_camera_command(
				SONY_PIC_COMMAND_SETCAMERASHARPNESS, c->value);
			meye.params.sharpness = c->value;
			break;
		case V4L2_CID_PICTURE:
			sony_pic_camera_command(
				SONY_PIC_COMMAND_SETCAMERAPICTURE, c->value);
			meye.params.picture = c->value;
			break;
		case V4L2_CID_JPEGQUAL:
			meye.params.quality = c->value;
			break;
		case V4L2_CID_FRAMERATE:
			meye.params.framerate = c->value;
			break;
		default:
			mutex_unlock(&meye.lock);
			return -EINVAL;
		}
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOC_G_CTRL: {
		struct v4l2_control *c = arg;

		mutex_lock(&meye.lock);
		switch (c->id) {
		case V4L2_CID_BRIGHTNESS:
			c->value = meye.picture.brightness >> 10;
			break;
		case V4L2_CID_HUE:
			c->value = meye.picture.hue >> 10;
			break;
		case V4L2_CID_CONTRAST:
			c->value = meye.picture.contrast >> 10;
			break;
		case V4L2_CID_SATURATION:
			c->value = meye.picture.colour >> 10;
			break;
		case V4L2_CID_AGC:
			c->value = meye.params.agc;
			break;
		case V4L2_CID_SHARPNESS:
			c->value = meye.params.sharpness;
			break;
		case V4L2_CID_PICTURE:
			c->value = meye.params.picture;
			break;
		case V4L2_CID_JPEGQUAL:
			c->value = meye.params.quality;
			break;
		case V4L2_CID_FRAMERATE:
			c->value = meye.params.framerate;
			break;
		default:
			mutex_unlock(&meye.lock);
			return -EINVAL;
		}
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOC_ENUM_FMT: {
		struct v4l2_fmtdesc *f = arg;

		if (f->index > 1)
			return -EINVAL;
		if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		if (f->index == 0) {
			/* standard YUV 422 capture */
			memset(f, 0, sizeof(*f));
			f->index = 0;
			f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
			f->flags = 0;
			strcpy(f->description, "YUV422");
			f->pixelformat = V4L2_PIX_FMT_YUYV;
		} else {
			/* compressed MJPEG capture */
			memset(f, 0, sizeof(*f));
			f->index = 1;
			f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
			f->flags = V4L2_FMT_FLAG_COMPRESSED;
			strcpy(f->description, "MJPEG");
			f->pixelformat = V4L2_PIX_FMT_MJPEG;
		}
		break;
	}

	case VIDIOC_TRY_FMT: {
		struct v4l2_format *f = arg;

		if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_YUYV &&
		    f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
			return -EINVAL;
		if (f->fmt.pix.field != V4L2_FIELD_ANY &&
		    f->fmt.pix.field != V4L2_FIELD_NONE)
			return -EINVAL;
		f->fmt.pix.field = V4L2_FIELD_NONE;
		if (f->fmt.pix.width <= 320) {
			f->fmt.pix.width = 320;
			f->fmt.pix.height = 240;
		} else {
			f->fmt.pix.width = 640;
			f->fmt.pix.height = 480;
		}
		f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
		f->fmt.pix.sizeimage = f->fmt.pix.height *
				       f->fmt.pix.bytesperline;
		f->fmt.pix.colorspace = 0;
		f->fmt.pix.priv = 0;
		break;
	}

	case VIDIOC_G_FMT: {
		struct v4l2_format *f = arg;

		if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		memset(&f->fmt.pix, 0, sizeof(struct v4l2_pix_format));
		f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		switch (meye.mchip_mode) {
		case MCHIP_HIC_MODE_CONT_OUT:
		default:
			f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
			break;
		case MCHIP_HIC_MODE_CONT_COMP:
			f->fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG;
			break;
		}
		f->fmt.pix.field = V4L2_FIELD_NONE;
		f->fmt.pix.width = mchip_hsize();
		f->fmt.pix.height = mchip_vsize();
		f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
		f->fmt.pix.sizeimage = f->fmt.pix.height *
				       f->fmt.pix.bytesperline;
		f->fmt.pix.colorspace = 0;
		f->fmt.pix.priv = 0;
		break;
	}

	case VIDIOC_S_FMT: {
		struct v4l2_format *f = arg;

		if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_YUYV &&
		    f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
			return -EINVAL;
		if (f->fmt.pix.field != V4L2_FIELD_ANY &&
		    f->fmt.pix.field != V4L2_FIELD_NONE)
			return -EINVAL;
		f->fmt.pix.field = V4L2_FIELD_NONE;
		mutex_lock(&meye.lock);
		if (f->fmt.pix.width <= 320) {
			f->fmt.pix.width = 320;
			f->fmt.pix.height = 240;
			meye.params.subsample = 1;
		} else {
			f->fmt.pix.width = 640;
			f->fmt.pix.height = 480;
			meye.params.subsample = 0;
		}
		switch (f->fmt.pix.pixelformat) {
		case V4L2_PIX_FMT_YUYV:
			meye.mchip_mode = MCHIP_HIC_MODE_CONT_OUT;
			break;
		case V4L2_PIX_FMT_MJPEG:
			meye.mchip_mode = MCHIP_HIC_MODE_CONT_COMP;
			break;
		}
		mutex_unlock(&meye.lock);
		f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
		f->fmt.pix.sizeimage = f->fmt.pix.height *
				       f->fmt.pix.bytesperline;
		f->fmt.pix.colorspace = 0;
		f->fmt.pix.priv = 0;

		break;
	}

	case VIDIOC_REQBUFS: {
		struct v4l2_requestbuffers *req = arg;
		int i;

		if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		if (req->memory != V4L2_MEMORY_MMAP)
			return -EINVAL;
		if (meye.grab_fbuffer && req->count == gbuffers) {
			/* already allocated, no modifications */
			break;
		}
		mutex_lock(&meye.lock);
		if (meye.grab_fbuffer) {
			for (i = 0; i < gbuffers; i++)
				if (meye.vma_use_count[i]) {
					mutex_unlock(&meye.lock);
					return -EINVAL;
				}
			rvfree(meye.grab_fbuffer, gbuffers * gbufsize);
			meye.grab_fbuffer = NULL;
		}
		gbuffers = max(2, min((int)req->count, MEYE_MAX_BUFNBRS));
		req->count = gbuffers;
		meye.grab_fbuffer = rvmalloc(gbuffers * gbufsize);
		if (!meye.grab_fbuffer) {
			printk(KERN_ERR "meye: v4l framebuffer allocation"
					" failed\n");
			mutex_unlock(&meye.lock);
			return -ENOMEM;
		}
		for (i = 0; i < gbuffers; i++)
			meye.vma_use_count[i] = 0;
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOC_QUERYBUF: {
		struct v4l2_buffer *buf = arg;
		int index = buf->index;

		if (index < 0 || index >= gbuffers)
			return -EINVAL;
		memset(buf, 0, sizeof(*buf));
		buf->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		buf->index = index;
		buf->bytesused = meye.grab_buffer[index].size;
		buf->flags = V4L2_BUF_FLAG_MAPPED;
		if (meye.grab_buffer[index].state == MEYE_BUF_USING)
			buf->flags |= V4L2_BUF_FLAG_QUEUED;
		if (meye.grab_buffer[index].state == MEYE_BUF_DONE)
			buf->flags |= V4L2_BUF_FLAG_DONE;
		buf->field = V4L2_FIELD_NONE;
		buf->timestamp = meye.grab_buffer[index].timestamp;
		buf->sequence = meye.grab_buffer[index].sequence;
		buf->memory = V4L2_MEMORY_MMAP;
		buf->m.offset = index * gbufsize;
		buf->length = gbufsize;
		break;
	}

	case VIDIOC_QBUF: {
		struct v4l2_buffer *buf = arg;

		if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		if (buf->memory != V4L2_MEMORY_MMAP)
			return -EINVAL;
		if (buf->index < 0 || buf->index >= gbuffers)
			return -EINVAL;
		if (meye.grab_buffer[buf->index].state != MEYE_BUF_UNUSED)
			return -EINVAL;
		mutex_lock(&meye.lock);
		buf->flags |= V4L2_BUF_FLAG_QUEUED;
		buf->flags &= ~V4L2_BUF_FLAG_DONE;
		meye.grab_buffer[buf->index].state = MEYE_BUF_USING;
		kfifo_put(meye.grabq, (unsigned char *)&buf->index, sizeof(int));
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOC_DQBUF: {
		struct v4l2_buffer *buf = arg;
		int reqnr;

		if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		if (buf->memory != V4L2_MEMORY_MMAP)
			return -EINVAL;

		mutex_lock(&meye.lock);
		if (kfifo_len(meye.doneq) == 0 && file->f_flags & O_NONBLOCK) {
			mutex_unlock(&meye.lock);
			return -EAGAIN;
		}
		if (wait_event_interruptible(meye.proc_list,
					     kfifo_len(meye.doneq) != 0) < 0) {
			mutex_unlock(&meye.lock);
			return -EINTR;
		}
		if (!kfifo_get(meye.doneq, (unsigned char *)&reqnr,
			       sizeof(int))) {
			mutex_unlock(&meye.lock);
			return -EBUSY;
		}
		if (meye.grab_buffer[reqnr].state != MEYE_BUF_DONE) {
			mutex_unlock(&meye.lock);
			return -EINVAL;
		}
		buf->index = reqnr;
		buf->bytesused = meye.grab_buffer[reqnr].size;
		buf->flags = V4L2_BUF_FLAG_MAPPED;
		buf->field = V4L2_FIELD_NONE;
		buf->timestamp = meye.grab_buffer[reqnr].timestamp;
		buf->sequence = meye.grab_buffer[reqnr].sequence;
		buf->memory = V4L2_MEMORY_MMAP;
		buf->m.offset = reqnr * gbufsize;
		buf->length = gbufsize;
		meye.grab_buffer[reqnr].state = MEYE_BUF_UNUSED;
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOC_STREAMON: {
		mutex_lock(&meye.lock);
		switch (meye.mchip_mode) {
		case MCHIP_HIC_MODE_CONT_OUT:
			mchip_continuous_start();
			break;
		case MCHIP_HIC_MODE_CONT_COMP:
			mchip_cont_compression_start();
			break;
		default:
			mutex_unlock(&meye.lock);
			return -EINVAL;
		}
		mutex_unlock(&meye.lock);
		break;
	}

	case VIDIOC_STREAMOFF: {
		int i;

		mutex_lock(&meye.lock);
		mchip_hic_stop();
		kfifo_reset(meye.grabq);
		kfifo_reset(meye.doneq);
		for (i = 0; i < MEYE_MAX_BUFNBRS; i++)
			meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
		mutex_unlock(&meye.lock);
		break;
	}

	/*
	 * XXX what about private snapshot ioctls ?
	 * Do they need to be converted to V4L2 ?
	*/

	default:
		return -ENOIOCTLCMD;
	}

	return 0;
}

static int meye_ioctl(struct inode *inode, struct file *file,
		     unsigned int cmd, unsigned long arg)
{
	return video_usercopy(inode, file, cmd, arg, meye_do_ioctl);
}

static unsigned int meye_poll(struct file *file, poll_table *wait)
{
	unsigned int res = 0;

	mutex_lock(&meye.lock);
	poll_wait(file, &meye.proc_list, wait);
	if (kfifo_len(meye.doneq))
		res = POLLIN | POLLRDNORM;
	mutex_unlock(&meye.lock);
	return res;
}

static void meye_vm_open(struct vm_area_struct *vma)
{
	long idx = (long)vma->vm_private_data;
	meye.vma_use_count[idx]++;
}

static void meye_vm_close(struct vm_area_struct *vma)
{
	long idx = (long)vma->vm_private_data;
	meye.vma_use_count[idx]--;
}

static struct vm_operations_struct meye_vm_ops = {
	.open		= meye_vm_open,
	.close		= meye_vm_close,
};

static int meye_mmap(struct file *file, struct vm_area_struct *vma)
{
	unsigned long start = vma->vm_start;
	unsigned long size = vma->vm_end - vma->vm_start;
	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
	unsigned long page, pos;

	mutex_lock(&meye.lock);
	if (size > gbuffers * gbufsize) {
		mutex_unlock(&meye.lock);
		return -EINVAL;
	}
	if (!meye.grab_fbuffer) {
		int i;

		/* lazy allocation */
		meye.grab_fbuffer = rvmalloc(gbuffers*gbufsize);
		if (!meye.grab_fbuffer) {
			printk(KERN_ERR "meye: v4l framebuffer allocation failed\n");
			mutex_unlock(&meye.lock);
			return -ENOMEM;
		}
		for (i = 0; i < gbuffers; i++)
			meye.vma_use_count[i] = 0;
	}
	pos = (unsigned long)meye.grab_fbuffer + offset;

	while (size > 0) {
		page = vmalloc_to_pfn((void *)pos);
		if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
			mutex_unlock(&meye.lock);
			return -EAGAIN;
		}
		start += PAGE_SIZE;
		pos += PAGE_SIZE;
		if (size > PAGE_SIZE)
			size -= PAGE_SIZE;
		else
			size = 0;
	}

	vma->vm_ops = &meye_vm_ops;
	vma->vm_flags &= ~VM_IO;	/* not I/O memory */
	vma->vm_flags |= VM_RESERVED;	/* avoid to swap out this VMA */
	vma->vm_private_data = (void *) (offset / gbufsize);
	meye_vm_open(vma);

	mutex_unlock(&meye.lock);
	return 0;
}

static const struct file_operations meye_fops = {
	.owner		= THIS_MODULE,
	.open		= meye_open,
	.release	= meye_release,
	.mmap		= meye_mmap,
	.ioctl		= meye_ioctl,
	.compat_ioctl	= v4l_compat_ioctl32,
	.poll		= meye_poll,
	.llseek		= no_llseek,
};

static struct video_device meye_template = {
	.owner		= THIS_MODULE,
	.name		= "meye",
	.type		= VID_TYPE_CAPTURE,
	.fops		= &meye_fops,
	.release	= video_device_release,
	.minor		= -1,
};

#ifdef CONFIG_PM
static int meye_suspend(struct pci_dev *pdev, pm_message_t state)
{
	pci_save_state(pdev);
	meye.pm_mchip_mode = meye.mchip_mode;
	mchip_hic_stop();
	mchip_set(MCHIP_MM_INTA, 0x0);
	return 0;
}

static int meye_resume(struct pci_dev *pdev)
{
	pci_restore_state(pdev);
	pci_write_config_word(meye.mchip_dev, MCHIP_PCI_SOFTRESET_SET, 1);

	mchip_delay(MCHIP_HIC_CMD, 0);
	mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);
	msleep(1);
	mchip_set(MCHIP_VRJ_SOFT_RESET, 1);
	msleep(1);
	mchip_set(MCHIP_MM_PCI_MODE, 5);
	msleep(1);
	mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK);

	switch (meye.pm_mchip_mode) {
	case MCHIP_HIC_MODE_CONT_OUT:
		mchip_continuous_start();
		break;
	case MCHIP_HIC_MODE_CONT_COMP:
		mchip_cont_compression_start();
		break;
	}
	return 0;
}
#endif

static int __devinit meye_probe(struct pci_dev *pcidev,
				const struct pci_device_id *ent)
{
	int ret = -EBUSY;
	unsigned long mchip_adr;

	if (meye.mchip_dev != NULL) {
		printk(KERN_ERR "meye: only one device allowed!\n");
		goto outnotdev;
	}

	meye.mchip_dev = pcidev;
	meye.video_dev = video_device_alloc();
	if (!meye.video_dev) {
		printk(KERN_ERR "meye: video_device_alloc() failed!\n");
		goto outnotdev;
	}

	ret = -ENOMEM;
	meye.grab_temp = vmalloc(MCHIP_NB_PAGES_MJPEG * PAGE_SIZE);
	if (!meye.grab_temp) {
		printk(KERN_ERR "meye: grab buffer allocation failed\n");
		goto outvmalloc;
	}

	spin_lock_init(&meye.grabq_lock);
	meye.grabq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
				 &meye.grabq_lock);
	if (IS_ERR(meye.grabq)) {
		printk(KERN_ERR "meye: fifo allocation failed\n");
		goto outkfifoalloc1;
	}
	spin_lock_init(&meye.doneq_lock);
	meye.doneq = kfifo_alloc(sizeof(int) * MEYE_MAX_BUFNBRS, GFP_KERNEL,
				 &meye.doneq_lock);
	if (IS_ERR(meye.doneq)) {
		printk(KERN_ERR "meye: fifo allocation failed\n");
		goto outkfifoalloc2;
	}

	memcpy(meye.video_dev, &meye_template, sizeof(meye_template));
	meye.video_dev->dev = &meye.mchip_dev->dev;

	if ((ret = sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 1))) {
		printk(KERN_ERR "meye: unable to power on the camera\n");
		printk(KERN_ERR "meye: did you enable the camera in "
				"sonypi using the module options ?\n");
		goto outsonypienable;
	}

	ret = -EIO;
	if ((ret = pci_enable_device(meye.mchip_dev))) {
		printk(KERN_ERR "meye: pci_enable_device failed\n");
		goto outenabledev;
	}

	mchip_adr = pci_resource_start(meye.mchip_dev,0);
	if (!mchip_adr) {
		printk(KERN_ERR "meye: mchip has no device base address\n");
		goto outregions;
	}
	if (!request_mem_region(pci_resource_start(meye.mchip_dev, 0),
				pci_resource_len(meye.mchip_dev, 0),
				"meye")) {
		printk(KERN_ERR "meye: request_mem_region failed\n");
		goto outregions;
	}
	meye.mchip_mmregs = ioremap(mchip_adr, MCHIP_MM_REGS);
	if (!meye.mchip_mmregs) {
		printk(KERN_ERR "meye: ioremap failed\n");
		goto outremap;
	}

	meye.mchip_irq = pcidev->irq;
	if (request_irq(meye.mchip_irq, meye_irq,
			IRQF_DISABLED | IRQF_SHARED, "meye", meye_irq)) {
		printk(KERN_ERR "meye: request_irq failed\n");
		goto outreqirq;
	}

	pci_write_config_byte(meye.mchip_dev, PCI_CACHE_LINE_SIZE, 8);
	pci_write_config_byte(meye.mchip_dev, PCI_LATENCY_TIMER, 64);

	pci_set_master(meye.mchip_dev);

	/* Ask the camera to perform a soft reset. */
	pci_write_config_word(meye.mchip_dev, MCHIP_PCI_SOFTRESET_SET, 1);

	mchip_delay(MCHIP_HIC_CMD, 0);
	mchip_delay(MCHIP_HIC_STATUS, MCHIP_HIC_STATUS_IDLE);

	msleep(1);
	mchip_set(MCHIP_VRJ_SOFT_RESET, 1);

	msleep(1);
	mchip_set(MCHIP_MM_PCI_MODE, 5);

	msleep(1);
	mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK);

	if (video_register_device(meye.video_dev, VFL_TYPE_GRABBER,
				  video_nr) < 0) {
		printk(KERN_ERR "meye: video_register_device failed\n");
		goto outvideoreg;
	}

	mutex_init(&meye.lock);
	init_waitqueue_head(&meye.proc_list);
	meye.picture.depth = 16;
	meye.picture.palette = VIDEO_PALETTE_YUV422;
	meye.picture.brightness = 32 << 10;
	meye.picture.hue = 32 << 10;
	meye.picture.colour = 32 << 10;
	meye.picture.contrast = 32 << 10;
	meye.picture.whiteness = 0;
	meye.params.subsample = 0;
	meye.params.quality = 8;
	meye.params.sharpness = 32;
	meye.params.agc = 48;
	meye.params.picture = 0;
	meye.params.framerate = 0;

	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERABRIGHTNESS, 32);
	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAHUE, 32);
	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACOLOR, 32);
	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERACONTRAST, 32);
	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERASHARPNESS, 32);
	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAPICTURE, 0);
	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAAGC, 48);

	printk(KERN_INFO "meye: Motion Eye Camera Driver v%s.\n",
	       MEYE_DRIVER_VERSION);
	printk(KERN_INFO "meye: mchip KL5A72002 rev. %d, base %lx, irq %d\n",
	       meye.mchip_dev->revision, mchip_adr, meye.mchip_irq);

	return 0;

outvideoreg:
	free_irq(meye.mchip_irq, meye_irq);
outreqirq:
	iounmap(meye.mchip_mmregs);
outremap:
	release_mem_region(pci_resource_start(meye.mchip_dev, 0),
			   pci_resource_len(meye.mchip_dev, 0));
outregions:
	pci_disable_device(meye.mchip_dev);
outenabledev:
	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 0);
outsonypienable:
	kfifo_free(meye.doneq);
outkfifoalloc2:
	kfifo_free(meye.grabq);
outkfifoalloc1:
	vfree(meye.grab_temp);
outvmalloc:
	video_device_release(meye.video_dev);
outnotdev:
	return ret;
}

static void __devexit meye_remove(struct pci_dev *pcidev)
{
	video_unregister_device(meye.video_dev);

	mchip_hic_stop();

	mchip_dma_free();

	/* disable interrupts */
	mchip_set(MCHIP_MM_INTA, 0x0);

	free_irq(meye.mchip_irq, meye_irq);

	iounmap(meye.mchip_mmregs);

	release_mem_region(pci_resource_start(meye.mchip_dev, 0),
			   pci_resource_len(meye.mchip_dev, 0));

	pci_disable_device(meye.mchip_dev);

	sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERA, 0);

	kfifo_free(meye.doneq);
	kfifo_free(meye.grabq);

	vfree(meye.grab_temp);

	if (meye.grab_fbuffer) {
		rvfree(meye.grab_fbuffer, gbuffers*gbufsize);
		meye.grab_fbuffer = NULL;
	}

	printk(KERN_INFO "meye: removed\n");
}

static struct pci_device_id meye_pci_tbl[] = {
	{ PCI_VENDOR_ID_KAWASAKI, PCI_DEVICE_ID_MCHIP_KL5A72002,
	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ }
};

MODULE_DEVICE_TABLE(pci, meye_pci_tbl);

static struct pci_driver meye_driver = {
	.name		= "meye",
	.id_table	= meye_pci_tbl,
	.probe		= meye_probe,
	.remove		= __devexit_p(meye_remove),
#ifdef CONFIG_PM
	.suspend	= meye_suspend,
	.resume		= meye_resume,
#endif
};

static int __init meye_init(void)
{
	gbuffers = max(2, min((int)gbuffers, MEYE_MAX_BUFNBRS));
	if (gbufsize < 0 || gbufsize > MEYE_MAX_BUFSIZE)
		gbufsize = MEYE_MAX_BUFSIZE;
	gbufsize = PAGE_ALIGN(gbufsize);
	printk(KERN_INFO "meye: using %d buffers with %dk (%dk total) "
			 "for capture\n",
			 gbuffers,
			 gbufsize / 1024, gbuffers * gbufsize / 1024);
	return pci_register_driver(&meye_driver);
}

static void __exit meye_exit(void)
{
	pci_unregister_driver(&meye_driver);
}

module_init(meye_init);
module_exit(meye_exit);