summaryrefslogtreecommitdiffstats
path: root/drivers/sis_vid.c
blob: 425376905a55bc63777b81e104aca5dee209f0de (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
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
/*
 *
 * sis_vid.c
 *
 * Copyright (C) 2000 Aaron Holtzman
 * 
 * This software has been released under the terms of the GNU Public
 * license. See http://www.gnu.org/copyleft/gpl.html for details.
 */

// video4linux interface disabled by A'rpi/ESP-team


//It's entirely possible this major conflicts with something else
/* mknod /dev/mga_vid c 178 0 */

#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/malloc.h>
#include <linux/pci.h>
#include <linux/init.h>
//#include <linux/videodev.h>

#include "sis_vid.h"

#ifdef CONFIG_MTRR 
#include <asm/mtrr.h>
#endif

#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/io.h>

#define TRUE 1
#define FALSE 0

#define MGA_VID_MAJOR 178


#ifndef PCI_DEVICE_ID_SI_6323 
#define PCI_DEVICE_ID_SI_6323 0x6326
#endif


MODULE_AUTHOR("Aaron Holtzman <aholtzma@engr.uvic.ca>");


typedef struct bes_registers_s
{
	//base address of yuv framebuffer
	uint32_t yuv_base;
	uint32_t u_base;
	uint32_t v_base;
	uint32_t fb_end;;

	//frame buffer pitch 
	uint32_t pitch;

	//window boundaries
	uint32_t left;
	uint32_t right;
	uint32_t top;
	uint32_t bottom;

	//control registers
	uint32_t misc_0;
	uint32_t misc_1;
	uint32_t misc_3;
	uint32_t misc_4;

	//key overlay mode
	uint32_t key_mode;

} bes_registers_t;

static bes_registers_t regs;
static uint32_t mga_vid_in_use = 0;
static uint32_t vid_src_ready = 0;
static uint32_t vid_overlay_on = 0;

static uint8_t *mga_mmio_base = 0;
static uint32_t mga_mem_base = 0; 
static uint32_t mga_src_base = 0;

static uint32_t mga_ram_size = 0;

static struct pci_dev *pci_dev;

//static struct video_window mga_win;
static mga_vid_config_t mga_config; 



// Backend Scaler registers

#define MISC_0 0x98
#define MISC_1 0x99
#define MISC_3 0x9d
#define MISC_4 0xb6




static void mga_vid_frame_sel(int frame)
{
	//we don't need the vcount protection as we're only hitting
	//one register (and it doesn't seem to be double buffered)
	//regs.besctl = (regs.besctl & ~0x07000000) + (frame << 25);
	//writel( regs.besctl, mga_mmio_base + BESCTL ); 
}


#define WRITE_REG(x,y,z) {outb((y),(x));outb((z),(x+1));}
#define READ_REG(x,y) (outb((y),(x)),inb(x+1))
#define VIDEO_ACCEL 0x3d4

static void mga_vid_write_regs(void)
{
	uint32_t foo;

	//unlock the video accel registers
	WRITE_REG(VIDEO_ACCEL,0x80,0x86);
	foo = READ_REG(VIDEO_ACCEL,0x80);

	if(foo != 0xa1)
		return; //something bad happened

	//setup the horizontal window bounds
	WRITE_REG(VIDEO_ACCEL,0x81,regs.left & 0xff);
	WRITE_REG(VIDEO_ACCEL,0x82,regs.right & 0xff);
	WRITE_REG(VIDEO_ACCEL,0x83,(regs.left >> 8) | ((regs.right>>4) & 0x70));

	//setup the vertical window bounds
	WRITE_REG(VIDEO_ACCEL,0x84,regs.top & 0xff);
	WRITE_REG(VIDEO_ACCEL,0x85,regs.bottom & 0xff);
	WRITE_REG(VIDEO_ACCEL,0x86,(regs.top >> 8) | ((regs.bottom>>4) & 0x70));

	//setup the framebuffer base addresses
	WRITE_REG(VIDEO_ACCEL,0x8a,regs.yuv_base & 0xff);
	WRITE_REG(VIDEO_ACCEL,0x8b,(regs.yuv_base >> 8) & 0xff);
	WRITE_REG(VIDEO_ACCEL,0x89,(regs.yuv_base >> 12) & 0xf0);

	WRITE_REG(VIDEO_ACCEL,0xb7,regs.u_base & 0xff);
	WRITE_REG(VIDEO_ACCEL,0xb8,(regs.u_base >> 8) & 0xff);

	WRITE_REG(VIDEO_ACCEL,0xba,regs.v_base & 0xff);
	WRITE_REG(VIDEO_ACCEL,0xbb,(regs.v_base >> 8) & 0xff);
	WRITE_REG(VIDEO_ACCEL,0xb9,((regs.v_base >> 12) & 0xf0) + ((regs.u_base >> 16) & 0xf));

	WRITE_REG(VIDEO_ACCEL,0x8d,regs.fb_end);

	//setup framebuffer pitch
	WRITE_REG(VIDEO_ACCEL,0x8c,regs.pitch & 0xff);
	WRITE_REG(VIDEO_ACCEL,0x8e,(regs.pitch >> 8) & 0x0f);
	WRITE_REG(VIDEO_ACCEL,0xbc,(regs.pitch) & 0xff);
	WRITE_REG(VIDEO_ACCEL,0xbd,((regs.pitch) >> 8) & 0x0f);


	//write key overlay register
	WRITE_REG(VIDEO_ACCEL,0xa9,regs.key_mode);

	WRITE_REG(VIDEO_ACCEL,0x93,0x40);
	WRITE_REG(VIDEO_ACCEL,0x94,1);
	WRITE_REG(VIDEO_ACCEL,0x9e,0);
	WRITE_REG(VIDEO_ACCEL,0x9f,0);

	//write config registers
	WRITE_REG(VIDEO_ACCEL,MISC_0,regs.misc_0);
	WRITE_REG(VIDEO_ACCEL,MISC_1,regs.misc_1);
	WRITE_REG(VIDEO_ACCEL,MISC_3,regs.misc_3);
	WRITE_REG(VIDEO_ACCEL,MISC_4,regs.misc_4);

	//setup the video line buffer
	WRITE_REG(VIDEO_ACCEL,0xa0,(regs.right - regs.left)/ 8);

}

static int mga_vid_set_config(mga_vid_config_t *config)
{
	uint32_t x, y, frame_size;

	x = config->x_org;
	y = config->y_org;

	regs.left =  x;
	regs.right= config->src_width + x;
	regs.top =  y;
	regs.bottom = config->src_height + y;

	printk(KERN_DEBUG "mga_vid: Setting up a %dx%d+%d+%d video window (src %dx%d)\n",
	       config->dest_width, config->dest_height, config->x_org, config->y_org, 
				 config->src_width, config->src_height);

	
	regs.pitch = ((config->src_width + 31) & ~31) / 4 ; 

	//frame size in pixels
	frame_size =  regs.pitch * config->src_height * 4;

	regs.yuv_base = (mga_src_base) >> 2;
	regs.u_base = (mga_src_base + frame_size) >> 2;
	regs.v_base = (mga_src_base + frame_size/4) >> 2;
	regs.fb_end = (mga_src_base + (3*frame_size)/2) >> 14;

	//disable video capture, enable video display, enable graphics display,
	//select yuv format, odd parity
	regs.misc_0 = (1 << 1) + (1<<6) + (1<<4);

	//disable dithering, no filtering, no interrupts
	regs.misc_1 = 0;

	//select 2's complement format YUV for playback
	regs.misc_3 = (1<<1);

	//select 4:2:0 video format, + yuv4:2:2 cpu writes
	regs.misc_4 = (1<<2);

	//disable keying
	regs.key_mode = 0xf;

	mga_vid_write_regs();
	return 0;
}


static int mga_vid_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	int frame;

	switch(cmd) 
	{
		case MGA_VID_CONFIG:
			//FIXME remove
			printk(KERN_DEBUG "mga_mmio_base = %p\n",mga_mmio_base);
			printk(KERN_DEBUG "mga_mem_base = %08x\n",mga_mem_base);
			//FIXME remove

			printk(KERN_DEBUG "mga_vid: Received configuration\n");

 			if(copy_from_user(&mga_config,(mga_vid_config_t*) arg,sizeof(mga_vid_config_t)))
			{
				printk(KERN_ERR "mga_vid: failed copy from userspace\n");
				return(-EFAULT);
			}

			mga_config.ram_size = mga_ram_size;
			//XXX make it look like a g400
			mga_config.card_type = MGA_G400;;

			if (copy_to_user((mga_vid_config_t *) arg, &mga_config, sizeof(mga_vid_config_t)))
			{
				printk(KERN_ERR "mga_vid: failed copy to userspace\n");
				return(-EFAULT);
			}
			return mga_vid_set_config(&mga_config);	
		break;

		case MGA_VID_ON:
			printk(KERN_DEBUG "mga_vid: Video ON\n");
			vid_src_ready = 1;
			if(vid_overlay_on)
			{
				//regs.besctl |= 1;
				mga_vid_write_regs();
			}
		break;

		case MGA_VID_OFF:
			printk(KERN_DEBUG "mga_vid: Video OFF\n");
			vid_src_ready = 0;   
			//regs.besctl &= ~1;
			mga_vid_write_regs();
		break;
			
		case MGA_VID_FSEL:
			if(copy_from_user(&frame,(int *) arg,sizeof(int)))
			{
				printk(KERN_ERR "mga_vid: FSEL failed copy from userspace\n");
				return(-EFAULT);
			}

			mga_vid_frame_sel(frame);
		break;

	        default:
			printk(KERN_ERR "mga_vid: Invalid ioctl\n");
			return (-EINVAL);
	}
       
	return 0;
}


static int mga_vid_find_card(void)
{
	struct pci_dev *dev = NULL;

	if((dev = pci_find_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_6323, NULL)))
	{
		printk(KERN_DEBUG "sis_vid: Found SiS 6326\n");
	}
	else
	{
		printk(KERN_ERR "sis_vid: No supported cards found\n");
		return FALSE;   
	}

	pci_dev = dev;
	
#if LINUX_VERSION_CODE >= 0x020300
	mga_mmio_base = ioremap_nocache(dev->resource[1].start,0x10000);
	mga_mem_base =  dev->resource[0].start;
#else
	mga_mmio_base = ioremap_nocache(dev->base_address[1] & PCI_BASE_ADDRESS_MEM_MASK,0x10000);
	mga_mem_base =  dev->base_address[0] & PCI_BASE_ADDRESS_MEM_MASK;
#endif
	printk(KERN_DEBUG "mga_vid: MMIO at 0x%p\n", mga_mmio_base);
	printk(KERN_DEBUG "mga_vid: Frame Buffer at 0x%08x\n", mga_mem_base);

	//FIXME set ram size properly
	mga_ram_size = 4;
	mga_src_base = (mga_ram_size - 1) * 0x100000;
	
	//FIXME remove
	if(1)
	{
		mga_vid_config_t config ={0,0,256,256,256,256,10,10,0,0,0,0};

		mga_vid_set_config(&config);
		mga_vid_write_regs();
		//regs.misc_0 ^= 2;
		//mga_vid_write_regs();
	}
	//FIXME remove

	return TRUE;
}


static ssize_t mga_vid_read(struct file *file, char *buf, size_t count, loff_t *ppos)
{
	return -EINVAL;
}

static ssize_t mga_vid_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
	return -EINVAL;
}

static int mga_vid_mmap(struct file *file, struct vm_area_struct *vma)
{

	printk(KERN_DEBUG "mga_vid: mapping video memory into userspace\n");
	if(remap_page_range(vma->vm_start, mga_mem_base + mga_src_base,
		 vma->vm_end - vma->vm_start, vma->vm_page_prot)) 
	{
		printk(KERN_ERR "mga_vid: error mapping video memory\n");
		return(-EAGAIN);
	}

	return(0);
}

static int mga_vid_release(struct inode *inode, struct file *file)
{
	//Close the window just in case
	vid_src_ready = 0;   
	regs.misc_0 &= 0xed;
	mga_vid_write_regs();
	mga_vid_in_use = 0;

	//FIXME put back in!
	//MOD_DEC_USE_COUNT;
	return 0;
}

static long long mga_vid_lseek(struct file *file, long long offset, int origin)
{
	return -ESPIPE;
}					 

static int mga_vid_open(struct inode *inode, struct file *file)
{
	int minor = MINOR(inode->i_rdev);

	if(minor != 0)
	 return(-ENXIO);

	if(mga_vid_in_use == 1) 
		return(-EBUSY);

	mga_vid_in_use = 1;
	//FIXME turn me back on!
	//MOD_INC_USE_COUNT;
	return(0);
}

#if LINUX_VERSION_CODE >= 0x020400
static struct file_operations mga_vid_fops =
{
	llseek:		mga_vid_lseek,
	read:			mga_vid_read,
	write:		mga_vid_write,
	ioctl:		mga_vid_ioctl,
	mmap:			mga_vid_mmap,
	open:			mga_vid_open,
	release: 	mga_vid_release
};
#else
static struct file_operations mga_vid_fops =
{
	mga_vid_lseek,
	mga_vid_read,
	mga_vid_write,
	NULL,
	NULL,
	mga_vid_ioctl,
	mga_vid_mmap,
	mga_vid_open,
	NULL,
	mga_vid_release
};
#endif

#if 0
static long mga_v4l_read(struct video_device *v, char *buf, unsigned long count, 
	int noblock)
{
	return -EINVAL;
}

static long mga_v4l_write(struct video_device *v, const char *buf, unsigned long count, int noblock)
{
	return -EINVAL;
}

static int mga_v4l_open(struct video_device *dev, int mode)
{
	MOD_INC_USE_COUNT;
	return 0;
}

static void mga_v4l_close(struct video_device *dev)
{
	//regs.besctl &= ~1;
	mga_vid_write_regs();
	vid_overlay_on = 0;
	MOD_DEC_USE_COUNT;
	return;
}

static int mga_v4l_init_done(struct video_device *dev)
{
	return 0;
}

static int mga_v4l_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
{
	switch(cmd)
	{
		case VIDIOCGCAP:
		{
			struct video_capability b;
			strcpy(b.name, "Matrox G200/400");
			b.type = VID_TYPE_SCALES|VID_TYPE_OVERLAY|VID_TYPE_CHROMAKEY;
			b.channels = 0;
			b.audios = 0;
			b.maxwidth = 1024;	/* GUESS ?? */
			b.maxheight = 768;
			b.minwidth = 32;
			b.minheight = 16;	/* GUESS ?? */
			if(copy_to_user(arg,&b,sizeof(b)))
				return -EFAULT;
			return 0;
		}
		case VIDIOCGPICT:
		{
			/*
			 *	Default values.. if we can change this we
			 *	can add the feature later
			 */
			struct video_picture vp;
			vp.brightness = 0x8000;
			vp.hue = 0x8000;
			vp.colour = 0x8000;
			vp.whiteness = 0x8000;
			vp.depth = 8;
			/* Format is a guess */
			vp.palette = VIDEO_PALETTE_YUV420P;
			if(copy_to_user(arg, &vp, sizeof(vp)))
				return -EFAULT;
			return 0;
		}
		case VIDIOCSPICT:
		{
			return -EINVAL;
		}
		case VIDIOCSWIN:
		{
			struct video_window vw;
			if(copy_from_user(&vw, arg, sizeof(vw)))
				return -EFAULT;
			if(vw.x <0 || vw.y <0 || vw.width < 32 
				|| vw.height < 16)
				return -EINVAL;
			memcpy(&mga_win, &vw, sizeof(mga_win));

			mga_config.x_org = vw.x;
			mga_config.y_org = vw.y;
			mga_config.dest_width = vw.width;
			mga_config.dest_height = vw.height;

			/* 
			 * May have to add 
			 *
			 * #define VIDEO_WINDOW_CHROMAKEY 16 
			 *
			 * to <linux/videodev.h> 
			 */

			//add it here for now
			#define VIDEO_WINDOW_CHROMAKEY 16 

			if (vw.flags & VIDEO_WINDOW_CHROMAKEY)
				mga_config.colkey_on = 1;
			else 
				mga_config.colkey_on = 0;

			mga_config.colkey_red   = (vw.chromakey >> 24) & 0xFF;
			mga_config.colkey_green = (vw.chromakey >> 16) & 0xFF;
			mga_config.colkey_blue  = (vw.chromakey >> 8)  & 0xFF;
			mga_vid_set_config(&mga_config);
			return 0;
				
		}
		case VIDIOCGWIN:
		{
			if(copy_to_user(arg, &mga_win, sizeof(mga_win)))
				return -EFAULT;
			return 0;
		}
		case VIDIOCCAPTURE:
		{
			int v;
			if(copy_from_user(&v, arg, sizeof(v)))
				return -EFAULT;
			vid_overlay_on = v;
			if(vid_overlay_on && vid_src_ready)
			{
				//regs.besctl |= 1;
				mga_vid_write_regs();
			}
			else
			{
				//regs.besctl &= ~1;
				mga_vid_write_regs();
			}
			return 0;
		}
		default:
			return -ENOIOCTLCMD;
	}
}

static struct video_device mga_v4l_dev =
{
	"Matrox G200/G400",
	VID_TYPE_CAPTURE,
	VID_HARDWARE_BT848,		/* This is a lie for now */
	mga_v4l_open,
	mga_v4l_close,
	mga_v4l_read,
	mga_v4l_write,
	NULL,
	mga_v4l_ioctl,
	NULL,
	mga_v4l_init_done,
	NULL,
	0,
	0
};

#endif

/* 
 * Main Initialization Function 
 */


static int mga_vid_initialize(void)
{
	mga_vid_in_use = 0;

	printk(KERN_DEBUG "SiS 6326 YUV Video interface v0.01 (c) Aaron Holtzman \n");
	if(register_chrdev(MGA_VID_MAJOR, "mga_vid", &mga_vid_fops))
	{
		printk(KERN_ERR "sis_vid: unable to get major: %d\n", MGA_VID_MAJOR);
		return -EIO;
	}

	if (!mga_vid_find_card())
	{
		printk(KERN_ERR "sis_vid: no supported devices found\n");
		unregister_chrdev(MGA_VID_MAJOR, "mga_vid");
		return -EINVAL;
	}
	
#if 0
	if (video_register_device(&mga_v4l_dev, VFL_TYPE_GRABBER)<0)
	{
		printk("sis_vid: unable to register.\n");
		unregister_chrdev(MGA_VID_MAJOR, "mga_vid");
		if(mga_mmio_base)
			iounmap(mga_mmio_base);
		mga_mmio_base = 0;
		return -EINVAL;
	}
#endif

	return(0);
}

int init_module(void)
{
	return mga_vid_initialize();
}

void cleanup_module(void)
{
//	video_unregister_device(&mga_v4l_dev);
	if(mga_mmio_base)
		iounmap(mga_mmio_base);

	//FIXME turn off BES
	printk(KERN_DEBUG "mga_vid: Cleaning up module\n");
	unregister_chrdev(MGA_VID_MAJOR, "mga_vid");
}