aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/intelfb/intelfbhw.h
blob: 10acda098b71e5c5685c739d105f2c12d90598c4 (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
#ifndef _INTELFBHW_H
#define _INTELFBHW_H

/* $DHD: intelfb/intelfbhw.h,v 1.5 2003/06/27 15:06:25 dawes Exp $ */


/*** HW-specific data ***/

/* Information about the 852GM/855GM variants */
#define INTEL_85X_CAPID		0x44
#define INTEL_85X_VARIANT_MASK		0x7
#define INTEL_85X_VARIANT_SHIFT		5
#define INTEL_VAR_855GME		0x0
#define INTEL_VAR_855GM			0x4
#define INTEL_VAR_852GME		0x2
#define INTEL_VAR_852GM			0x5

/* Information about DVO/LVDS Ports */
#define DVOA_PORT  0x1
#define DVOB_PORT  0x2
#define DVOC_PORT  0x4
#define LVDS_PORT  0x8

/*
 * The Bridge device's PCI config space has information about the
 * fb aperture size and the amount of pre-reserved memory.
 */
#define INTEL_GMCH_CTRL		0x52
#define INTEL_GMCH_ENABLED		0x4
#define INTEL_GMCH_MEM_MASK		0x1
#define INTEL_GMCH_MEM_64M		0x1
#define INTEL_GMCH_MEM_128M		0

#define INTEL_830_GMCH_GMS_MASK		(0x7 << 4)
#define INTEL_830_GMCH_GMS_DISABLED	(0x0 << 4)
#define INTEL_830_GMCH_GMS_LOCAL	(0x1 << 4)
#define INTEL_830_GMCH_GMS_STOLEN_512	(0x2 << 4)
#define INTEL_830_GMCH_GMS_STOLEN_1024	(0x3 << 4)
#define INTEL_830_GMCH_GMS_STOLEN_8192	(0x4 << 4)

#define INTEL_855_GMCH_GMS_MASK		(0x7 << 4)
#define INTEL_855_GMCH_GMS_DISABLED	(0x0 << 4)
#define INTEL_855_GMCH_GMS_STOLEN_1M	(0x1 << 4)
#define INTEL_855_GMCH_GMS_STOLEN_4M	(0x2 << 4)
#define INTEL_855_GMCH_GMS_STOLEN_8M	(0x3 << 4)
#define INTEL_855_GMCH_GMS_STOLEN_16M	(0x4 << 4)
#define INTEL_855_GMCH_GMS_STOLEN_32M	(0x5 << 4)

#define INTEL_915G_GMCH_GMS_STOLEN_48M	(0x6 << 4)
#define INTEL_915G_GMCH_GMS_STOLEN_64M	(0x7 << 4)

/* HW registers */

/* Fence registers */
#define FENCE			0x2000
#define FENCE_NUM			8

/* Primary ring buffer */
#define PRI_RING_TAIL		0x2030
#define RING_TAIL_MASK			0x001ffff8
#define RING_INUSE			0x1

#define PRI_RING_HEAD		0x2034
#define RING_HEAD_WRAP_MASK		0x7ff
#define RING_HEAD_WRAP_SHIFT		21
#define RING_HEAD_MASK			0x001ffffc

#define PRI_RING_START		0x2038
#define RING_START_MASK			0xfffff000

#define PRI_RING_LENGTH		0x203c
#define RING_LENGTH_MASK		0x001ff000
#define RING_REPORT_MASK		(0x3 << 1)
#define RING_NO_REPORT			(0x0 << 1)
#define RING_REPORT_64K			(0x1 << 1)
#define RING_REPORT_4K			(0x2 << 1)
#define RING_REPORT_128K		(0x3 << 1)
#define RING_ENABLE			0x1

/*
 * Tail can't wrap to any closer than RING_MIN_FREE bytes of the head,
 * and the last RING_MIN_FREE bytes need to be padded with MI_NOOP
 */
#define RING_MIN_FREE			64

#define IPEHR     		0x2088

#define INSTDONE		0x2090
#define PRI_RING_EMPTY			1

#define INSTPM			0x20c0
#define SYNC_FLUSH_ENABLE		(1 << 5)

#define INSTPS			0x20c4

#define MEM_MODE		0x20cc

#define MASK_SHIFT			16

#define FW_BLC_0		0x20d8
#define FW_DISPA_WM_SHIFT		0
#define FW_DISPA_WM_MASK		0x3f
#define FW_DISPA_BL_SHIFT		8
#define FW_DISPA_BL_MASK		0xf
#define FW_DISPB_WM_SHIFT		16
#define FW_DISPB_WM_MASK		0x1f
#define FW_DISPB_BL_SHIFT		24
#define FW_DISPB_BL_MASK		0x7

#define FW_BLC_1		0x20dc
#define FW_DISPC_WM_SHIFT		0
#define FW_DISPC_WM_MASK		0x1f
#define FW_DISPC_BL_SHIFT		8
#define FW_DISPC_BL_MASK		0x7


/* PLL registers */
#define VGA0_DIVISOR		0x06000
#define VGA1_DIVISOR		0x06004
#define VGAPD			0x06010
#define VGAPD_0_P1_SHIFT		0
#define VGAPD_0_P1_FORCE_DIV2		(1 << 5)
#define VGAPD_0_P2_SHIFT		7
#define VGAPD_1_P1_SHIFT		8
#define VGAPD_1_P1_FORCE_DIV2		(1 << 13)
#define VGAPD_1_P2_SHIFT		15

#define DPLL_A			0x06014
#define DPLL_B			0x06018
#define DPLL_VCO_ENABLE			(1 << 31)
#define DPLL_2X_CLOCK_ENABLE		(1 << 30)
#define DPLL_SYNCLOCK_ENABLE		(1 << 29)
#define DPLL_VGA_MODE_DISABLE		(1 << 28)
#define DPLL_P2_MASK			1
#define DPLL_P2_SHIFT			23
#define DPLL_I9XX_P2_SHIFT              24
#define DPLL_P1_FORCE_DIV2		(1 << 21)
#define DPLL_P1_MASK			0x1f
#define DPLL_P1_SHIFT			16
#define DPLL_REFERENCE_SELECT_MASK	(0x3 << 13)
#define DPLL_REFERENCE_DEFAULT		(0x0 << 13)
#define DPLL_REFERENCE_TVCLK		(0x2 << 13)
#define DPLL_RATE_SELECT_MASK		(1 << 8)
#define DPLL_RATE_SELECT_FP0		(0 << 8)
#define DPLL_RATE_SELECT_FP1		(1 << 8)

#define FPA0			0x06040
#define FPA1			0x06044
#define FPB0			0x06048
#define FPB1			0x0604c
#define FP_DIVISOR_MASK			0x3f
#define FP_N_DIVISOR_SHIFT		16
#define FP_M1_DIVISOR_SHIFT		8
#define FP_M2_DIVISOR_SHIFT		0

/* PLL parameters (these are for 852GM/855GM/865G, check earlier chips). */
/* Clock values are in units of kHz */
#define PLL_REFCLK		48000
#define MIN_CLOCK		25000
#define MAX_CLOCK		350000

/* Two pipes */
#define PIPE_A			0
#define PIPE_B			1
#define PIPE_MASK		1

/* palette registers */
#define PALETTE_A		0x0a000
#define PALETTE_B		0x0a800
#ifndef PALETTE_8_ENTRIES
#define PALETTE_8_ENTRIES		256
#endif
#define PALETTE_8_SIZE			(PALETTE_8_ENTRIES * 4)
#define PALETTE_10_ENTRIES		128
#define PALETTE_10_SIZE			(PALETTE_10_ENTRIES * 8)
#define PALETTE_8_MASK			0xff
#define PALETTE_8_RED_SHIFT		16
#define PALETTE_8_GREEN_SHIFT		8
#define PALETTE_8_BLUE_SHIFT		0

/* CRTC registers */
#define HTOTAL_A		0x60000
#define HBLANK_A		0x60004
#define HSYNC_A			0x60008
#define VTOTAL_A		0x6000c
#define VBLANK_A		0x60010
#define VSYNC_A			0x60014
#define SRC_SIZE_A		0x6001c
#define BCLRPAT_A		0x60020

#define HTOTAL_B		0x61000
#define HBLANK_B		0x61004
#define HSYNC_B			0x61008
#define VTOTAL_B		0x6100c
#define VBLANK_B		0x61010
#define VSYNC_B			0x61014
#define SRC_SIZE_B		0x6101c
#define BCLRPAT_B		0x61020

#define HTOTAL_MASK			0xfff
#define HTOTAL_SHIFT			16
#define HACTIVE_MASK			0x7ff
#define HACTIVE_SHIFT			0
#define HBLANKEND_MASK			0xfff
#define HBLANKEND_SHIFT			16
#define HBLANKSTART_MASK		0xfff
#define HBLANKSTART_SHIFT		0
#define HSYNCEND_MASK			0xfff
#define HSYNCEND_SHIFT			16
#define HSYNCSTART_MASK			0xfff
#define HSYNCSTART_SHIFT		0
#define VTOTAL_MASK			0xfff
#define VTOTAL_SHIFT			16
#define VACTIVE_MASK			0x7ff
#define VACTIVE_SHIFT			0
#define VBLANKEND_MASK			0xfff
#define VBLANKEND_SHIFT			16
#define VBLANKSTART_MASK		0xfff
#define VBLANKSTART_SHIFT		0
#define VSYNCEND_MASK			0xfff
#define VSYNCEND_SHIFT			16
#define VSYNCSTART_MASK			0xfff
#define VSYNCSTART_SHIFT		0
#define SRC_SIZE_HORIZ_MASK		0x7ff
#define SRC_SIZE_HORIZ_SHIFT		16
#define SRC_SIZE_VERT_MASK		0x7ff
#define SRC_SIZE_VERT_SHIFT		0

#define ADPA			0x61100
#define ADPA_DAC_ENABLE			(1 << 31)
#define ADPA_DAC_DISABLE		0
#define ADPA_PIPE_SELECT_SHIFT		30
#define ADPA_USE_VGA_HVPOLARITY		(1 << 15)
#define ADPA_SETS_HVPOLARITY		0
#define ADPA_DPMS_CONTROL_MASK		(0x3 << 10)
#define ADPA_DPMS_D0			(0x0 << 10)
#define ADPA_DPMS_D2			(0x1 << 10)
#define ADPA_DPMS_D1			(0x2 << 10)
#define ADPA_DPMS_D3			(0x3 << 10)
#define ADPA_VSYNC_ACTIVE_SHIFT		4
#define ADPA_HSYNC_ACTIVE_SHIFT		3
#define ADPA_SYNC_ACTIVE_MASK		1
#define ADPA_SYNC_ACTIVE_HIGH		1
#define ADPA_SYNC_ACTIVE_LOW		0

#define DVOA			0x61120
#define DVOB			0x61140
#define DVOC			0x61160
#define LVDS			0x61180
#define PORT_ENABLE		        (1 << 31)
#define PORT_PIPE_SELECT_SHIFT	        30
#define PORT_TV_FLAGS_MASK              0xFF
#define PORT_TV_FLAGS                   0xC4  // ripped from my BIOS
                                              // to understand and correct

#define DVOA_SRCDIM		0x61124
#define DVOB_SRCDIM		0x61144
#define DVOC_SRCDIM		0x61164

#define PIPEACONF		0x70008
#define PIPEBCONF		0x71008
#define PIPECONF_ENABLE			(1 << 31)
#define PIPECONF_DISABLE		0
#define PIPECONF_DOUBLE_WIDE		(1 << 30)
#define PIPECONF_SINGLE_WIDE		0
#define PIPECONF_LOCKED			(1 << 25)
#define PIPECONF_UNLOCKED		0
#define PIPECONF_GAMMA			(1 << 24)
#define PIPECONF_PALETTE		0

#define DISPARB			0x70030
#define DISPARB_AEND_MASK		0x1ff
#define DISPARB_AEND_SHIFT		0
#define DISPARB_BEND_MASK		0x3ff
#define DISPARB_BEND_SHIFT		9

/* Desktop HW cursor */
#define CURSOR_CONTROL		0x70080
#define CURSOR_ENABLE			(1 << 31)
#define CURSOR_GAMMA_ENABLE		(1 << 30)
#define CURSOR_STRIDE_MASK		(0x3 << 28)
#define CURSOR_STRIDE_256		(0x0 << 28)
#define CURSOR_STRIDE_512		(0x1 << 28)
#define CURSOR_STRIDE_1K		(0x2 << 28)
#define CURSOR_STRIDE_2K		(0x3 << 28)
#define CURSOR_FORMAT_MASK		(0x7 << 24)
#define CURSOR_FORMAT_2C		(0x0 << 24)
#define CURSOR_FORMAT_3C		(0x1 << 24)
#define CURSOR_FORMAT_4C		(0x2 << 24)
#define CURSOR_FORMAT_ARGB		(0x4 << 24)
#define CURSOR_FORMAT_XRGB		(0x5 << 24)

/* Mobile HW cursor (and i810) */
#define CURSOR_A_CONTROL	CURSOR_CONTROL
#define CURSOR_B_CONTROL	0x700c0
#define CURSOR_MODE_MASK		0x27
#define CURSOR_MODE_DISABLE		0
#define CURSOR_MODE_64_3C		0x04
#define CURSOR_MODE_64_4C_AX		0x05
#define CURSOR_MODE_64_4C		0x06
#define CURSOR_MODE_64_32B_AX		0x07
#define CURSOR_MODE_64_ARGB_AX		0x27
#define CURSOR_PIPE_SELECT_SHIFT	28
#define CURSOR_MOBILE_GAMMA_ENABLE	(1 << 26)
#define CURSOR_MEM_TYPE_LOCAL		(1 << 25)

/* All platforms (desktop has no pipe B) */
#define CURSOR_A_BASEADDR	0x70084
#define CURSOR_B_BASEADDR	0x700c4
#define CURSOR_BASE_MASK		0xffffff00

#define CURSOR_A_POSITION	0x70088
#define CURSOR_B_POSITION	0x700c8
#define CURSOR_POS_SIGN			(1 << 15)
#define CURSOR_POS_MASK			0x7ff
#define CURSOR_X_SHIFT			0
#define CURSOR_Y_SHIFT			16

#define CURSOR_A_PALETTE0	0x70090
#define CURSOR_A_PALETTE1	0x70094
#define CURSOR_A_PALETTE2	0x70098
#define CURSOR_A_PALETTE3	0x7009c
#define CURSOR_B_PALETTE0	0x700d0
#define CURSOR_B_PALETTE1	0x700d4
#define CURSOR_B_PALETTE2	0x700d8
#define CURSOR_B_PALETTE3	0x700dc
#define CURSOR_COLOR_MASK			0xff
#define CURSOR_RED_SHIFT			16
#define CURSOR_GREEN_SHIFT			8
#define CURSOR_BLUE_SHIFT			0
#define CURSOR_PALETTE_MASK			0xffffff

/* Desktop only */
#define CURSOR_SIZE		0x700a0
#define CURSOR_SIZE_MASK		0x3ff
#define CURSOR_SIZE_H_SHIFT		0
#define CURSOR_SIZE_V_SHIFT		12

#define DSPACNTR		0x70180
#define DSPBCNTR		0x71180
#define DISPPLANE_PLANE_ENABLE		(1 << 31)
#define DISPPLANE_PLANE_DISABLE		0
#define DISPPLANE_GAMMA_ENABLE		(1<<30)
#define DISPPLANE_GAMMA_DISABLE		0
#define DISPPLANE_PIXFORMAT_MASK	(0xf<<26)
#define DISPPLANE_8BPP			(0x2<<26)
#define DISPPLANE_15_16BPP		(0x4<<26)
#define DISPPLANE_16BPP			(0x5<<26)
#define DISPPLANE_32BPP_NO_ALPHA 	(0x6<<26)
#define DISPPLANE_32BPP			(0x7<<26)
#define DISPPLANE_STEREO_ENABLE		(1<<25)
#define DISPPLANE_STEREO_DISABLE	0
#define DISPPLANE_SEL_PIPE_SHIFT	24
#define DISPPLANE_SRC_KEY_ENABLE	(1<<22)
#define DISPPLANE_SRC_KEY_DISABLE	0
#define DISPPLANE_LINE_DOUBLE		(1<<20)
#define DISPPLANE_NO_LINE_DOUBLE	0
#define DISPPLANE_STEREO_POLARITY_FIRST	0
#define DISPPLANE_STEREO_POLARITY_SECOND (1<<18)
/* plane B only */
#define DISPPLANE_ALPHA_TRANS_ENABLE	(1<<15)
#define DISPPLANE_ALPHA_TRANS_DISABLE	0
#define DISPPLANE_SPRITE_ABOVE_DISPLAYA	0
#define DISPPLANE_SPRITE_ABOVE_OVERLAY	1

#define DSPABASE		0x70184
#define DSPASTRIDE		0x70188

#define DSPBBASE		0x71184
#define DSPBSTRIDE		0x71188

#define VGACNTRL		0x71400
#define VGA_DISABLE			(1 << 31)
#define VGA_ENABLE			0
#define VGA_PIPE_SELECT_SHIFT		29
#define VGA_PALETTE_READ_SELECT		23
#define VGA_PALETTE_A_WRITE_DISABLE	(1 << 22)
#define VGA_PALETTE_B_WRITE_DISABLE	(1 << 21)
#define VGA_LEGACY_PALETTE		(1 << 20)
#define VGA_6BIT_DAC			0
#define VGA_8BIT_DAC			(1 << 20)

#define ADD_ID			0x71408
#define ADD_ID_MASK			0xff

/* BIOS scratch area registers (830M and 845G). */
#define SWF0			0x71410
#define SWF1			0x71414
#define SWF2			0x71418
#define SWF3			0x7141c
#define SWF4			0x71420
#define SWF5			0x71424
#define SWF6			0x71428

/* BIOS scratch area registers (852GM, 855GM, 865G). */
#define SWF00			0x70410
#define SWF01			0x70414
#define SWF02			0x70418
#define SWF03			0x7041c
#define SWF04			0x70420
#define SWF05			0x70424
#define SWF06			0x70428

#define SWF10			SWF0
#define SWF11			SWF1
#define SWF12			SWF2
#define SWF13			SWF3
#define SWF14			SWF4
#define SWF15			SWF5
#define SWF16			SWF6

#define SWF30			0x72414
#define SWF31			0x72418
#define SWF32			0x7241c

/* Memory Commands */
#define MI_NOOP			(0x00 << 23)
#define MI_NOOP_WRITE_ID		(1 << 22)
#define MI_NOOP_ID_MASK			((1 << 22) - 1)

#define MI_FLUSH		(0x04 << 23)
#define MI_WRITE_DIRTY_STATE		(1 << 4)
#define MI_END_SCENE			(1 << 3)
#define MI_INHIBIT_RENDER_CACHE_FLUSH	(1 << 2)
#define MI_INVALIDATE_MAP_CACHE		(1 << 0)

#define MI_STORE_DWORD_IMM	((0x20 << 23) | 1)

/* 2D Commands */
#define COLOR_BLT_CMD		((2 << 29) | (0x40 << 22) | 3)
#define XY_COLOR_BLT_CMD	((2 << 29) | (0x50 << 22) | 4)
#define XY_SETUP_CLIP_BLT_CMD	((2 << 29) | (0x03 << 22) | 1)
#define XY_SRC_COPY_BLT_CMD	((2 << 29) | (0x53 << 22) | 6)
#define SRC_COPY_BLT_CMD	((2 << 29) | (0x43 << 22) | 4)
#define XY_MONO_PAT_BLT_CMD	((2 << 29) | (0x52 << 22) | 7)
#define XY_MONO_SRC_BLT_CMD	((2 << 29) | (0x54 << 22) | 6)
#define XY_MONO_SRC_IMM_BLT_CMD	((2 << 29) | (0x71 << 22) | 5)
#define TXT_IMM_BLT_CMD	        ((2 << 29) | (0x30 << 22) | 2)
#define SETUP_BLT_CMD	        ((2 << 29) | (0x00 << 22) | 6)

#define DW_LENGTH_MASK			0xff

#define WRITE_ALPHA			(1 << 21)
#define WRITE_RGB			(1 << 20)
#define VERT_SEED			(3 << 8)
#define HORIZ_SEED			(3 << 12)

#define COLOR_DEPTH_8			(0 << 24)
#define COLOR_DEPTH_16			(1 << 24)
#define COLOR_DEPTH_32			(3 << 24)

#define SRC_ROP_GXCOPY			0xcc
#define SRC_ROP_GXXOR			0x66

#define PAT_ROP_GXCOPY                  0xf0
#define PAT_ROP_GXXOR                   0x5a

#define PITCH_SHIFT			0
#define ROP_SHIFT			16
#define WIDTH_SHIFT			0
#define HEIGHT_SHIFT			16

/* in bytes */
#define MAX_MONO_IMM_SIZE		128


/*** Macros ***/

/* I/O macros */
#define INREG8(addr)	      readb((u8 __iomem *)(dinfo->mmio_base + (addr)))
#define INREG(addr)	      readl((u32 __iomem *)(dinfo->mmio_base + (addr)))
#define OUTREG8(addr, val)    writeb((val),(u8 __iomem *)(dinfo->mmio_base + \
							   (addr)))
#define OUTREG(addr, val)     writel((val),(u32 __iomem *)(dinfo->mmio_base + \
                                     (addr)))

/* Ring buffer macros */
#define OUT_RING(n)	do {						\
	writel((n), (u32 __iomem *)(dinfo->ring.virtual + dinfo->ring_tail));\
	dinfo->ring_tail += 4;						\
	dinfo->ring_tail &= dinfo->ring_tail_mask;			\
} while (0)

#define START_RING(n)	do {						\
	if (dinfo->ring_space < (n) * 4)				\
		wait_ring(dinfo,(n) * 4);				\
	dinfo->ring_space -= (n) * 4;					\
} while (0)

#define ADVANCE_RING()	do {						\
	OUTREG(PRI_RING_TAIL, dinfo->ring_tail);                        \
} while (0)

#define DO_RING_IDLE()	do {						\
	u32 head, tail;							\
	do {								\
		head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;		\
		tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;		\
		udelay(10);						\
	} while (head != tail);						\
} while (0)


/* function protoypes */
extern int intelfbhw_get_chipset(struct pci_dev *pdev, struct intelfb_info *dinfo);
extern int intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size,
				int *stolen_size);
extern int intelfbhw_check_non_crt(struct intelfb_info *dinfo);
extern const char *intelfbhw_dvo_to_string(int dvo);
extern int intelfbhw_validate_mode(struct intelfb_info *dinfo,
				   struct fb_var_screeninfo *var);
extern int intelfbhw_pan_display(struct fb_var_screeninfo *var,
				 struct fb_info *info);
extern void intelfbhw_do_blank(int blank, struct fb_info *info);
extern void intelfbhw_setcolreg(struct intelfb_info *dinfo, unsigned regno,
				unsigned red, unsigned green, unsigned blue,
				unsigned transp);
extern int intelfbhw_read_hw_state(struct intelfb_info *dinfo,
				   struct intelfb_hwstate *hw, int flag);
extern void intelfbhw_print_hw_state(struct intelfb_info *dinfo,
				     struct intelfb_hwstate *hw);
extern int intelfbhw_mode_to_hw(struct intelfb_info *dinfo,
				struct intelfb_hwstate *hw,
				struct fb_var_screeninfo *var);
extern int intelfbhw_program_mode(struct intelfb_info *dinfo,
				  const struct intelfb_hwstate *hw, int blank);
extern void intelfbhw_do_sync(struct intelfb_info *dinfo);
extern void intelfbhw_2d_stop(struct intelfb_info *dinfo);
extern void intelfbhw_2d_start(struct intelfb_info *dinfo);
extern void intelfbhw_do_fillrect(struct intelfb_info *dinfo, u32 x, u32 y,
				  u32 w, u32 h, u32 color, u32 pitch, u32 bpp,
				  u32 rop);
extern void intelfbhw_do_bitblt(struct intelfb_info *dinfo, u32 curx, u32 cury,
				u32 dstx, u32 dsty, u32 w, u32 h, u32 pitch,
				u32 bpp);
extern int intelfbhw_do_drawglyph(struct intelfb_info *dinfo, u32 fg, u32 bg,
				  u32 w, u32 h, const u8* cdat, u32 x, u32 y,
				  u32 pitch, u32 bpp);
extern void intelfbhw_cursor_init(struct intelfb_info *dinfo);
extern void intelfbhw_cursor_hide(struct intelfb_info *dinfo);
extern void intelfbhw_cursor_show(struct intelfb_info *dinfo);
extern void intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y);
extern void intelfbhw_cursor_setcolor(struct intelfb_info *dinfo, u32 bg,
				      u32 fg);
extern void intelfbhw_cursor_load(struct intelfb_info *dinfo, int width,
				  int height, u8 *data);
extern void intelfbhw_cursor_reset(struct intelfb_info *dinfo);

#endif /* _INTELFBHW_H */