summaryrefslogtreecommitdiff
path: root/drivers/char/agp/via-agp.c
blob: a460ae352772584e03ac250ee7694cf361083b48 (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * VIA AGPGART routines.
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/agp_backend.h>
#include "agp.h"

static const struct pci_device_id agp_via_pci_table[];

#define VIA_GARTCTRL	0x80
#define VIA_APSIZE	0x84
#define VIA_ATTBASE	0x88

#define VIA_AGP3_GARTCTRL	0x90
#define VIA_AGP3_APSIZE		0x94
#define VIA_AGP3_ATTBASE	0x98
#define VIA_AGPSEL		0xfd

static int via_fetch_size(void)
{
	int i;
	u8 temp;
	struct aper_size_info_8 *values;

	values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
	pci_read_config_byte(agp_bridge->dev, VIA_APSIZE, &temp);
	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
		if (temp == values[i].size_value) {
			agp_bridge->previous_size =
			    agp_bridge->current_size = (void *) (values + i);
			agp_bridge->aperture_size_idx = i;
			return values[i].size;
		}
	}
	printk(KERN_ERR PFX "Unknown aperture size from AGP bridge (0x%x)\n", temp);
	return 0;
}


static int via_configure(void)
{
	struct aper_size_info_8 *current_size;

	current_size = A_SIZE_8(agp_bridge->current_size);
	/* aperture size */
	pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
			      current_size->size_value);
	/* address to map to */
	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
						    AGP_APERTURE_BAR);

	/* GART control register */
	pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, 0x0000000f);

	/* attbase - aperture GATT base */
	pci_write_config_dword(agp_bridge->dev, VIA_ATTBASE,
			    (agp_bridge->gatt_bus_addr & 0xfffff000) | 3);
	return 0;
}


static void via_cleanup(void)
{
	struct aper_size_info_8 *previous_size;

	previous_size = A_SIZE_8(agp_bridge->previous_size);
	pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
			      previous_size->size_value);
	/* Do not disable by writing 0 to VIA_ATTBASE, it screws things up
	 * during reinitialization.
	 */
}


static void via_tlbflush(struct agp_memory *mem)
{
	u32 temp;

	pci_read_config_dword(agp_bridge->dev, VIA_GARTCTRL, &temp);
	temp |= (1<<7);
	pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, temp);
	temp &= ~(1<<7);
	pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, temp);
}


static const struct aper_size_info_8 via_generic_sizes[9] =
{
	{256, 65536, 6, 0},
	{128, 32768, 5, 128},
	{64, 16384, 4, 192},
	{32, 8192, 3, 224},
	{16, 4096, 2, 240},
	{8, 2048, 1, 248},
	{4, 1024, 0, 252},
	{2, 512, 0, 254},
	{1, 256, 0, 255}
};


static int via_fetch_size_agp3(void)
{
	int i;
	u16 temp;
	struct aper_size_info_16 *values;

	values = A_SIZE_16(agp_bridge->driver->aperture_sizes);
	pci_read_config_word(agp_bridge->dev, VIA_AGP3_APSIZE, &temp);
	temp &= 0xfff;

	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
		if (temp == values[i].size_value) {
			agp_bridge->previous_size =
				agp_bridge->current_size = (void *) (values + i);
			agp_bridge->aperture_size_idx = i;
			return values[i].size;
		}
	}
	return 0;
}


static int via_configure_agp3(void)
{
	u32 temp;
	struct aper_size_info_16 *current_size;

	current_size = A_SIZE_16(agp_bridge->current_size);

	/* address to map to */
	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
						    AGP_APERTURE_BAR);

	/* attbase - aperture GATT base */
	pci_write_config_dword(agp_bridge->dev, VIA_AGP3_ATTBASE,
		agp_bridge->gatt_bus_addr & 0xfffff000);

	/* 1. Enable GTLB in RX90<7>, all AGP aperture access needs to fetch
	 *    translation table first.
	 * 2. Enable AGP aperture in RX91<0>. This bit controls the enabling of the
	 *    graphics AGP aperture for the AGP3.0 port.
	 */
	pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
	pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp | (3<<7));
	return 0;
}


static void via_cleanup_agp3(void)
{
	struct aper_size_info_16 *previous_size;

	previous_size = A_SIZE_16(agp_bridge->previous_size);
	pci_write_config_byte(agp_bridge->dev, VIA_APSIZE, previous_size->size_value);
}


static void via_tlbflush_agp3(struct agp_memory *mem)
{
	u32 temp;

	pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
	pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp & ~(1<<7));
	pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp);
}


static const struct agp_bridge_driver via_agp3_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= agp3_generic_sizes,
	.size_type		= U8_APER_SIZE,
	.num_aperture_sizes	= 10,
	.needs_scratch_page	= true,
	.configure		= via_configure_agp3,
	.fetch_size		= via_fetch_size_agp3,
	.cleanup		= via_cleanup_agp3,
	.tlb_flush		= via_tlbflush_agp3,
	.mask_memory		= agp_generic_mask_memory,
	.masks			= NULL,
	.agp_enable		= agp_generic_enable,
	.cache_flush		= global_cache_flush,
	.create_gatt_table	= agp_generic_create_gatt_table,
	.free_gatt_table	= agp_generic_free_gatt_table,
	.insert_memory		= agp_generic_insert_memory,
	.remove_memory		= agp_generic_remove_memory,
	.alloc_by_type		= agp_generic_alloc_by_type,
	.free_by_type		= agp_generic_free_by_type,
	.agp_alloc_page		= agp_generic_alloc_page,
	.agp_alloc_pages	= agp_generic_alloc_pages,
	.agp_destroy_page	= agp_generic_destroy_page,
	.agp_destroy_pages	= agp_generic_destroy_pages,
	.agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static const struct agp_bridge_driver via_driver = {
	.owner			= THIS_MODULE,
	.aperture_sizes		= via_generic_sizes,
	.size_type		= U8_APER_SIZE,
	.num_aperture_sizes	= 9,
	.needs_scratch_page	= true,
	.configure		= via_configure,
	.fetch_size		= via_fetch_size,
	.cleanup		= via_cleanup,
	.tlb_flush		= via_tlbflush,
	.mask_memory		= agp_generic_mask_memory,
	.masks			= NULL,
	.agp_enable		= agp_generic_enable,
	.cache_flush		= global_cache_flush,
	.create_gatt_table	= agp_generic_create_gatt_table,
	.free_gatt_table	= agp_generic_free_gatt_table,
	.insert_memory		= agp_generic_insert_memory,
	.remove_memory		= agp_generic_remove_memory,
	.alloc_by_type		= agp_generic_alloc_by_type,
	.free_by_type		= agp_generic_free_by_type,
	.agp_alloc_page		= agp_generic_alloc_page,
	.agp_alloc_pages	= agp_generic_alloc_pages,
	.agp_destroy_page	= agp_generic_destroy_page,
	.agp_destroy_pages	= agp_generic_destroy_pages,
	.agp_type_to_mask_type  = agp_generic_type_to_mask_type,
};

static struct agp_device_ids via_agp_device_ids[] =
{
	{
		.device_id	= PCI_DEVICE_ID_VIA_82C597_0,
		.chipset_name	= "Apollo VP3",
	},

	{
		.device_id	= PCI_DEVICE_ID_VIA_82C598_0,
		.chipset_name	= "Apollo MVP3",
	},

	{
		.device_id	= PCI_DEVICE_ID_VIA_8501_0,
		.chipset_name	= "Apollo MVP4",
	},

	/* VT8601 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8601_0,
		.chipset_name	= "Apollo ProMedia/PLE133Ta",
	},

	/* VT82C693A / VT28C694T */
	{
		.device_id	= PCI_DEVICE_ID_VIA_82C691_0,
		.chipset_name	= "Apollo Pro 133",
	},

	{
		.device_id	= PCI_DEVICE_ID_VIA_8371_0,
		.chipset_name	= "KX133",
	},

	/* VT8633 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8633_0,
		.chipset_name	= "Pro 266",
	},

	{
		.device_id	= PCI_DEVICE_ID_VIA_XN266,
		.chipset_name	= "Apollo Pro266",
	},

	/* VT8361 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8361,
		.chipset_name	= "KLE133",
	},

	/* VT8365 / VT8362 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8363_0,
		.chipset_name	= "Twister-K/KT133x/KM133",
	},

	/* VT8753A */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8753_0,
		.chipset_name	= "P4X266",
	},

	/* VT8366 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8367_0,
		.chipset_name	= "KT266/KY266x/KT333",
	},

	/* VT8633 (for CuMine/ Celeron) */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8653_0,
		.chipset_name	= "Pro266T",
	},

	/* KM266 / PM266 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_XM266,
		.chipset_name	= "PM266/KM266",
	},

	/* CLE266 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_862X_0,
		.chipset_name	= "CLE266",
	},

	{
		.device_id	= PCI_DEVICE_ID_VIA_8377_0,
		.chipset_name	= "KT400/KT400A/KT600",
	},

	/* VT8604 / VT8605 / VT8603
	 * (Apollo Pro133A chipset with S3 Savage4) */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8605_0,
		.chipset_name	= "ProSavage PM133/PL133/PN133"
	},

	/* P4M266x/P4N266 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8703_51_0,
		.chipset_name	= "P4M266x/P4N266",
	},

	/* VT8754 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8754C_0,
		.chipset_name	= "PT800",
	},

	/* P4X600 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8763_0,
		.chipset_name	= "P4X600"
	},

	/* KM400 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8378_0,
		.chipset_name	= "KM400/KM400A",
	},

	/* PT880 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_PT880,
		.chipset_name	= "PT880",
	},

	/* PT880 Ultra */
	{
		.device_id	= PCI_DEVICE_ID_VIA_PT880ULTRA,
		.chipset_name	= "PT880 Ultra",
	},

	/* PT890 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_8783_0,
		.chipset_name	= "PT890",
	},

	/* PM800/PN800/PM880/PN880 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_PX8X0_0,
		.chipset_name	= "PM800/PN800/PM880/PN880",
	},
	/* KT880 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_3269_0,
		.chipset_name	= "KT880",
	},
	/* KTxxx/Px8xx */
	{
		.device_id	= PCI_DEVICE_ID_VIA_83_87XX_1,
		.chipset_name	= "VT83xx/VT87xx/KTxxx/Px8xx",
	},
	/* P4M800 */
	{
		.device_id	= PCI_DEVICE_ID_VIA_3296_0,
		.chipset_name	= "P4M800",
	},
	/* P4M800CE */
	{
		.device_id	= PCI_DEVICE_ID_VIA_P4M800CE,
		.chipset_name	= "VT3314",
	},
	/* VT3324 / CX700 */
	{
		.device_id  = PCI_DEVICE_ID_VIA_VT3324,
		.chipset_name   = "CX700",
	},
	/* VT3336 - this is a chipset for AMD Athlon/K8 CPU. Due to K8's unique
	 * architecture, the AGP resource and behavior are different from
	 * the traditional AGP which resides only in chipset. AGP is used
	 * by 3D driver which wasn't available for the VT3336 and VT3364
	 * generation until now.  Unfortunately, by testing, VT3364 works
	 * but VT3336 doesn't. - explanation from via, just leave this as
	 * as a placeholder to avoid future patches adding it back in.
	 */
#if 0
	{
		.device_id  = PCI_DEVICE_ID_VIA_VT3336,
		.chipset_name   = "VT3336",
	},
#endif
	/* P4M890 */
	{
		.device_id  = PCI_DEVICE_ID_VIA_P4M890,
		.chipset_name   = "P4M890",
	},
	/* P4M900 */
	{
		.device_id  = PCI_DEVICE_ID_VIA_VT3364,
		.chipset_name   = "P4M900",
	},
	{ }, /* dummy final entry, always present */
};


/*
 * VIA's AGP3 chipsets do magick to put the AGP bridge compliant
 * with the same standards version as the graphics card.
 */
static void check_via_agp3 (struct agp_bridge_data *bridge)
{
	u8 reg;

	pci_read_config_byte(bridge->dev, VIA_AGPSEL, &reg);
	/* Check AGP 2.0 compatibility mode. */
	if ((reg & (1<<1))==0)
		bridge->driver = &via_agp3_driver;
}


static int agp_via_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct agp_device_ids *devs = via_agp_device_ids;
	struct agp_bridge_data *bridge;
	int j = 0;
	u8 cap_ptr;

	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
	if (!cap_ptr)
		return -ENODEV;

	j = ent - agp_via_pci_table;
	printk (KERN_INFO PFX "Detected VIA %s chipset\n", devs[j].chipset_name);

	bridge = agp_alloc_bridge();
	if (!bridge)
		return -ENOMEM;

	bridge->dev = pdev;
	bridge->capndx = cap_ptr;
	bridge->driver = &via_driver;

	/*
	 * Garg, there are KT400s with KT266 IDs.
	 */
	if (pdev->device == PCI_DEVICE_ID_VIA_8367_0) {
		/* Is there a KT400 subsystem ? */
		if (pdev->subsystem_device == PCI_DEVICE_ID_VIA_8377_0) {
			printk(KERN_INFO PFX "Found KT400 in disguise as a KT266.\n");
			check_via_agp3(bridge);
		}
	}

	/* If this is an AGP3 bridge, check which mode its in and adjust. */
	get_agp_version(bridge);
	if (bridge->major_version >= 3)
		check_via_agp3(bridge);

	/* Fill in the mode register */
	pci_read_config_dword(pdev,
			bridge->capndx+PCI_AGP_STATUS, &bridge->mode);

	pci_set_drvdata(pdev, bridge);
	return agp_add_bridge(bridge);
}

static void agp_via_remove(struct pci_dev *pdev)
{
	struct agp_bridge_data *bridge = pci_get_drvdata(pdev);

	agp_remove_bridge(bridge);
	agp_put_bridge(bridge);
}

#define agp_via_suspend NULL

static int __maybe_unused agp_via_resume(struct device *dev)
{
	struct agp_bridge_data *bridge = dev_get_drvdata(dev);

	if (bridge->driver == &via_agp3_driver)
		return via_configure_agp3();
	else if (bridge->driver == &via_driver)
		return via_configure();

	return 0;
}

/* must be the same order as name table above */
static const struct pci_device_id agp_via_pci_table[] = {
#define ID(x) \
	{						\
	.class		= (PCI_CLASS_BRIDGE_HOST << 8),	\
	.class_mask	= ~0,				\
	.vendor		= PCI_VENDOR_ID_VIA,		\
	.device		= x,				\
	.subvendor	= PCI_ANY_ID,			\
	.subdevice	= PCI_ANY_ID,			\
	}
	ID(PCI_DEVICE_ID_VIA_82C597_0),
	ID(PCI_DEVICE_ID_VIA_82C598_0),
	ID(PCI_DEVICE_ID_VIA_8501_0),
	ID(PCI_DEVICE_ID_VIA_8601_0),
	ID(PCI_DEVICE_ID_VIA_82C691_0),
	ID(PCI_DEVICE_ID_VIA_8371_0),
	ID(PCI_DEVICE_ID_VIA_8633_0),
	ID(PCI_DEVICE_ID_VIA_XN266),
	ID(PCI_DEVICE_ID_VIA_8361),
	ID(PCI_DEVICE_ID_VIA_8363_0),
	ID(PCI_DEVICE_ID_VIA_8753_0),
	ID(PCI_DEVICE_ID_VIA_8367_0),
	ID(PCI_DEVICE_ID_VIA_8653_0),
	ID(PCI_DEVICE_ID_VIA_XM266),
	ID(PCI_DEVICE_ID_VIA_862X_0),
	ID(PCI_DEVICE_ID_VIA_8377_0),
	ID(PCI_DEVICE_ID_VIA_8605_0),
	ID(PCI_DEVICE_ID_VIA_8703_51_0),
	ID(PCI_DEVICE_ID_VIA_8754C_0),
	ID(PCI_DEVICE_ID_VIA_8763_0),
	ID(PCI_DEVICE_ID_VIA_8378_0),
	ID(PCI_DEVICE_ID_VIA_PT880),
	ID(PCI_DEVICE_ID_VIA_PT880ULTRA),
	ID(PCI_DEVICE_ID_VIA_8783_0),
	ID(PCI_DEVICE_ID_VIA_PX8X0_0),
	ID(PCI_DEVICE_ID_VIA_3269_0),
	ID(PCI_DEVICE_ID_VIA_83_87XX_1),
	ID(PCI_DEVICE_ID_VIA_3296_0),
	ID(PCI_DEVICE_ID_VIA_P4M800CE),
	ID(PCI_DEVICE_ID_VIA_VT3324),
	ID(PCI_DEVICE_ID_VIA_P4M890),
	ID(PCI_DEVICE_ID_VIA_VT3364),
	{ }
};

MODULE_DEVICE_TABLE(pci, agp_via_pci_table);

static SIMPLE_DEV_PM_OPS(agp_via_pm_ops, agp_via_suspend, agp_via_resume);

static struct pci_driver agp_via_pci_driver = {
	.name		= "agpgart-via",
	.id_table	= agp_via_pci_table,
	.probe		= agp_via_probe,
	.remove		= agp_via_remove,
	.driver.pm      = &agp_via_pm_ops,
};


static int __init agp_via_init(void)
{
	if (agp_off)
		return -EINVAL;
	return pci_register_driver(&agp_via_pci_driver);
}

static void __exit agp_via_cleanup(void)
{
	pci_unregister_driver(&agp_via_pci_driver);
}

module_init(agp_via_init);
module_exit(agp_via_cleanup);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dave Jones");