1 /*
2  * linux/drivers/video/savagefb.c -- S3 Savage Framebuffer Driver
3  *
4  * Copyright (c) 2001-2002  Denis Oliver Kropp <dok@directfb.org>
5  *                          Sven Neumann <neo@directfb.org>
6  *
7  *
8  * Card specific code is based on XFree86's savage driver.
9  * Framebuffer framework code is based on code of cyber2000fb and tdfxfb.
10  *
11  * This file is subject to the terms and conditions of the GNU General
12  * Public License.  See the file COPYING in the main directory of this
13  * archive for more details.
14  *
15  * 0.4.0 (neo)
16  *  - hardware accelerated clear and move
17  *
18  * 0.3.2 (dok)
19  *  - wait for vertical retrace before writing to cr67
20  *    at the beginning of savagefb_set_par
21  *  - use synchronization registers cr23 and cr26
22  *
23  * 0.3.1 (dok)
24  *  - reset 3D engine
25  *  - don't return alpha bits for 32bit format
26  *
27  * 0.3.0 (dok)
28  *  - added WaitIdle functions for all Savage types
29  *  - do WaitIdle before mode switching
30  *  - code cleanup
31  *
32  * 0.2.0 (dok)
33  *  - first working version
34  *
35  *
36  * TODO
37  * - clock validations in decode_var
38  *
39  * BUGS
40  * - white margin on bootup
41  *
42  */
43 
44 #include <linux/aperture.h>
45 #include <linux/module.h>
46 #include <linux/kernel.h>
47 #include <linux/errno.h>
48 #include <linux/string.h>
49 #include <linux/mm.h>
50 #include <linux/slab.h>
51 #include <linux/delay.h>
52 #include <linux/fb.h>
53 #include <linux/pci.h>
54 #include <linux/init.h>
55 #include <linux/console.h>
56 
57 #include <asm/io.h>
58 #include <asm/irq.h>
59 
60 #include "savagefb.h"
61 
62 
63 #define SAVAGEFB_VERSION "0.4.0_2.6"
64 
65 /* --------------------------------------------------------------------- */
66 
67 
68 static char *mode_option = NULL;
69 
70 #ifdef MODULE
71 
72 MODULE_AUTHOR("(c) 2001-2002  Denis Oliver Kropp <dok@directfb.org>");
73 MODULE_LICENSE("GPL");
74 MODULE_DESCRIPTION("FBDev driver for S3 Savage PCI/AGP Chips");
75 
76 #endif
77 
78 
79 /* --------------------------------------------------------------------- */
80 
81 static void vgaHWSeqReset(struct savagefb_par *par, int start)
82 {
83 	if (start)
84 		VGAwSEQ(0x00, 0x01, par);	/* Synchronous Reset */
85 	else
86 		VGAwSEQ(0x00, 0x03, par);	/* End Reset */
87 }
88 
89 static void vgaHWProtect(struct savagefb_par *par, int on)
90 {
91 	unsigned char tmp;
92 
93 	if (on) {
94 		/*
95 		 * Turn off screen and disable sequencer.
96 		 */
97 		tmp = VGArSEQ(0x01, par);
98 
99 		vgaHWSeqReset(par, 1);	        /* start synchronous reset */
100 		VGAwSEQ(0x01, tmp | 0x20, par);/* disable the display */
101 
102 		VGAenablePalette(par);
103 	} else {
104 		/*
105 		 * Reenable sequencer, then turn on screen.
106 		 */
107 
108 		tmp = VGArSEQ(0x01, par);
109 
110 		VGAwSEQ(0x01, tmp & ~0x20, par);/* reenable display */
111 		vgaHWSeqReset(par, 0);	        /* clear synchronous reset */
112 
113 		VGAdisablePalette(par);
114 	}
115 }
116 
117 static void vgaHWRestore(struct savagefb_par  *par, struct savage_reg *reg)
118 {
119 	int i;
120 
121 	VGAwMISC(reg->MiscOutReg, par);
122 
123 	for (i = 1; i < 5; i++)
124 		VGAwSEQ(i, reg->Sequencer[i], par);
125 
126 	/* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 or
127 	   CRTC[17] */
128 	VGAwCR(17, reg->CRTC[17] & ~0x80, par);
129 
130 	for (i = 0; i < 25; i++)
131 		VGAwCR(i, reg->CRTC[i], par);
132 
133 	for (i = 0; i < 9; i++)
134 		VGAwGR(i, reg->Graphics[i], par);
135 
136 	VGAenablePalette(par);
137 
138 	for (i = 0; i < 21; i++)
139 		VGAwATTR(i, reg->Attribute[i], par);
140 
141 	VGAdisablePalette(par);
142 }
143 
144 static void vgaHWInit(struct fb_var_screeninfo *var,
145 		      struct savagefb_par            *par,
146 		      struct xtimings                *timings,
147 		      struct savage_reg              *reg)
148 {
149 	reg->MiscOutReg = 0x23;
150 
151 	if (!(timings->sync & FB_SYNC_HOR_HIGH_ACT))
152 		reg->MiscOutReg |= 0x40;
153 
154 	if (!(timings->sync & FB_SYNC_VERT_HIGH_ACT))
155 		reg->MiscOutReg |= 0x80;
156 
157 	/*
158 	 * Time Sequencer
159 	 */
160 	reg->Sequencer[0x00] = 0x00;
161 	reg->Sequencer[0x01] = 0x01;
162 	reg->Sequencer[0x02] = 0x0F;
163 	reg->Sequencer[0x03] = 0x00;          /* Font select */
164 	reg->Sequencer[0x04] = 0x0E;          /* Misc */
165 
166 	/*
167 	 * CRTC Controller
168 	 */
169 	reg->CRTC[0x00] = (timings->HTotal >> 3) - 5;
170 	reg->CRTC[0x01] = (timings->HDisplay >> 3) - 1;
171 	reg->CRTC[0x02] = (timings->HSyncStart >> 3) - 1;
172 	reg->CRTC[0x03] = (((timings->HSyncEnd >> 3)  - 1) & 0x1f) | 0x80;
173 	reg->CRTC[0x04] = (timings->HSyncStart >> 3);
174 	reg->CRTC[0x05] = ((((timings->HSyncEnd >> 3) - 1) & 0x20) << 2) |
175 		(((timings->HSyncEnd >> 3)) & 0x1f);
176 	reg->CRTC[0x06] = (timings->VTotal - 2) & 0xFF;
177 	reg->CRTC[0x07] = (((timings->VTotal - 2) & 0x100) >> 8) |
178 		(((timings->VDisplay - 1) & 0x100) >> 7) |
179 		((timings->VSyncStart & 0x100) >> 6) |
180 		(((timings->VSyncStart - 1) & 0x100) >> 5) |
181 		0x10 |
182 		(((timings->VTotal - 2) & 0x200) >> 4) |
183 		(((timings->VDisplay - 1) & 0x200) >> 3) |
184 		((timings->VSyncStart & 0x200) >> 2);
185 	reg->CRTC[0x08] = 0x00;
186 	reg->CRTC[0x09] = (((timings->VSyncStart - 1) & 0x200) >> 4) | 0x40;
187 
188 	if (timings->dblscan)
189 		reg->CRTC[0x09] |= 0x80;
190 
191 	reg->CRTC[0x0a] = 0x00;
192 	reg->CRTC[0x0b] = 0x00;
193 	reg->CRTC[0x0c] = 0x00;
194 	reg->CRTC[0x0d] = 0x00;
195 	reg->CRTC[0x0e] = 0x00;
196 	reg->CRTC[0x0f] = 0x00;
197 	reg->CRTC[0x10] = timings->VSyncStart & 0xff;
198 	reg->CRTC[0x11] = (timings->VSyncEnd & 0x0f) | 0x20;
199 	reg->CRTC[0x12] = (timings->VDisplay - 1) & 0xff;
200 	reg->CRTC[0x13] = var->xres_virtual >> 4;
201 	reg->CRTC[0x14] = 0x00;
202 	reg->CRTC[0x15] = (timings->VSyncStart - 1) & 0xff;
203 	reg->CRTC[0x16] = (timings->VSyncEnd - 1) & 0xff;
204 	reg->CRTC[0x17] = 0xc3;
205 	reg->CRTC[0x18] = 0xff;
206 
207 	/*
208 	 * are these unnecessary?
209 	 * vgaHWHBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN|KGA_ENABLE_ON_ZERO);
210 	 * vgaHWVBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN|KGA_ENABLE_ON_ZERO);
211 	 */
212 
213 	/*
214 	 * Graphics Display Controller
215 	 */
216 	reg->Graphics[0x00] = 0x00;
217 	reg->Graphics[0x01] = 0x00;
218 	reg->Graphics[0x02] = 0x00;
219 	reg->Graphics[0x03] = 0x00;
220 	reg->Graphics[0x04] = 0x00;
221 	reg->Graphics[0x05] = 0x40;
222 	reg->Graphics[0x06] = 0x05;   /* only map 64k VGA memory !!!! */
223 	reg->Graphics[0x07] = 0x0F;
224 	reg->Graphics[0x08] = 0xFF;
225 
226 
227 	reg->Attribute[0x00]  = 0x00; /* standard colormap translation */
228 	reg->Attribute[0x01]  = 0x01;
229 	reg->Attribute[0x02]  = 0x02;
230 	reg->Attribute[0x03]  = 0x03;
231 	reg->Attribute[0x04]  = 0x04;
232 	reg->Attribute[0x05]  = 0x05;
233 	reg->Attribute[0x06]  = 0x06;
234 	reg->Attribute[0x07]  = 0x07;
235 	reg->Attribute[0x08]  = 0x08;
236 	reg->Attribute[0x09]  = 0x09;
237 	reg->Attribute[0x0a] = 0x0A;
238 	reg->Attribute[0x0b] = 0x0B;
239 	reg->Attribute[0x0c] = 0x0C;
240 	reg->Attribute[0x0d] = 0x0D;
241 	reg->Attribute[0x0e] = 0x0E;
242 	reg->Attribute[0x0f] = 0x0F;
243 	reg->Attribute[0x10] = 0x41;
244 	reg->Attribute[0x11] = 0xFF;
245 	reg->Attribute[0x12] = 0x0F;
246 	reg->Attribute[0x13] = 0x00;
247 	reg->Attribute[0x14] = 0x00;
248 }
249 
250 /* -------------------- Hardware specific routines ------------------------- */
251 
252 /*
253  * Hardware Acceleration for SavageFB
254  */
255 
256 /* Wait for fifo space */
257 static void
258 savage3D_waitfifo(struct savagefb_par *par, int space)
259 {
260 	int slots = MAXFIFO - space;
261 
262 	while ((savage_in32(0x48C00, par) & 0x0000ffff) > slots);
263 }
264 
265 static void
266 savage4_waitfifo(struct savagefb_par *par, int space)
267 {
268 	int slots = MAXFIFO - space;
269 
270 	while ((savage_in32(0x48C60, par) & 0x001fffff) > slots);
271 }
272 
273 static void
274 savage2000_waitfifo(struct savagefb_par *par, int space)
275 {
276 	int slots = MAXFIFO - space;
277 
278 	while ((savage_in32(0x48C60, par) & 0x0000ffff) > slots);
279 }
280 
281 /* Wait for idle accelerator */
282 static void
283 savage3D_waitidle(struct savagefb_par *par)
284 {
285 	while ((savage_in32(0x48C00, par) & 0x0008ffff) != 0x80000);
286 }
287 
288 static void
289 savage4_waitidle(struct savagefb_par *par)
290 {
291 	while ((savage_in32(0x48C60, par) & 0x00a00000) != 0x00a00000);
292 }
293 
294 static void
295 savage2000_waitidle(struct savagefb_par *par)
296 {
297 	while ((savage_in32(0x48C60, par) & 0x009fffff));
298 }
299 
300 #ifdef CONFIG_FB_SAVAGE_ACCEL
301 static void
302 SavageSetup2DEngine(struct savagefb_par  *par)
303 {
304 	unsigned long GlobalBitmapDescriptor;
305 
306 	GlobalBitmapDescriptor = 1 | 8 | BCI_BD_BW_DISABLE;
307 	BCI_BD_SET_BPP(GlobalBitmapDescriptor, par->depth);
308 	BCI_BD_SET_STRIDE(GlobalBitmapDescriptor, par->vwidth);
309 
310 	switch(par->chip) {
311 	case S3_SAVAGE3D:
312 	case S3_SAVAGE_MX:
313 		/* Disable BCI */
314 		savage_out32(0x48C18, savage_in32(0x48C18, par) & 0x3FF0, par);
315 		/* Setup BCI command overflow buffer */
316 		savage_out32(0x48C14,
317 			     (par->cob_offset >> 11) | (par->cob_index << 29),
318 			     par);
319 		/* Program shadow status update. */
320 		savage_out32(0x48C10, 0x78207220, par);
321 		savage_out32(0x48C0C, 0, par);
322 		/* Enable BCI and command overflow buffer */
323 		savage_out32(0x48C18, savage_in32(0x48C18, par) | 0x0C, par);
324 		break;
325 	case S3_SAVAGE4:
326 	case S3_TWISTER:
327 	case S3_PROSAVAGE:
328 	case S3_PROSAVAGEDDR:
329 	case S3_SUPERSAVAGE:
330 		/* Disable BCI */
331 		savage_out32(0x48C18, savage_in32(0x48C18, par) & 0x3FF0, par);
332 		/* Program shadow status update */
333 		savage_out32(0x48C10, 0x00700040, par);
334 		savage_out32(0x48C0C, 0, par);
335 		/* Enable BCI without the COB */
336 		savage_out32(0x48C18, savage_in32(0x48C18, par) | 0x08, par);
337 		break;
338 	case S3_SAVAGE2000:
339 		/* Disable BCI */
340 		savage_out32(0x48C18, 0, par);
341 		/* Setup BCI command overflow buffer */
342 		savage_out32(0x48C18,
343 			     (par->cob_offset >> 7) | (par->cob_index),
344 			     par);
345 		/* Disable shadow status update */
346 		savage_out32(0x48A30, 0, par);
347 		/* Enable BCI and command overflow buffer */
348 		savage_out32(0x48C18, savage_in32(0x48C18, par) | 0x00280000,
349 			     par);
350 		break;
351 	    default:
352 		break;
353 	}
354 	/* Turn on 16-bit register access. */
355 	vga_out8(0x3d4, 0x31, par);
356 	vga_out8(0x3d5, 0x0c, par);
357 
358 	/* Set stride to use GBD. */
359 	vga_out8(0x3d4, 0x50, par);
360 	vga_out8(0x3d5, vga_in8(0x3d5, par) | 0xC1, par);
361 
362 	/* Enable 2D engine. */
363 	vga_out8(0x3d4, 0x40, par);
364 	vga_out8(0x3d5, 0x01, par);
365 
366 	savage_out32(MONO_PAT_0, ~0, par);
367 	savage_out32(MONO_PAT_1, ~0, par);
368 
369 	/* Setup plane masks */
370 	savage_out32(0x8128, ~0, par); /* enable all write planes */
371 	savage_out32(0x812C, ~0, par); /* enable all read planes */
372 	savage_out16(0x8134, 0x27, par);
373 	savage_out16(0x8136, 0x07, par);
374 
375 	/* Now set the GBD */
376 	par->bci_ptr = 0;
377 	par->SavageWaitFifo(par, 4);
378 
379 	BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD1);
380 	BCI_SEND(0);
381 	BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD2);
382 	BCI_SEND(GlobalBitmapDescriptor);
383 
384 	/*
385 	 * I don't know why, sending this twice fixes the initial black screen,
386 	 * prevents X from crashing at least in Toshiba laptops with SavageIX.
387 	 * --Tony
388 	 */
389 	par->bci_ptr = 0;
390 	par->SavageWaitFifo(par, 4);
391 
392 	BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD1);
393 	BCI_SEND(0);
394 	BCI_SEND(BCI_CMD_SETREG | (1 << 16) | BCI_GBD2);
395 	BCI_SEND(GlobalBitmapDescriptor);
396 }
397 
398 static void savagefb_set_clip(struct fb_info *info)
399 {
400 	struct savagefb_par *par = info->par;
401 	int cmd;
402 
403 	cmd = BCI_CMD_NOP | BCI_CMD_CLIP_NEW;
404 	par->bci_ptr = 0;
405 	par->SavageWaitFifo(par,3);
406 	BCI_SEND(cmd);
407 	BCI_SEND(BCI_CLIP_TL(0, 0));
408 	BCI_SEND(BCI_CLIP_BR(0xfff, 0xfff));
409 }
410 #else
411 static void SavageSetup2DEngine(struct savagefb_par  *par) {}
412 
413 #endif
414 
415 static void SavageCalcClock(long freq, int min_m, int min_n1, int max_n1,
416 			    int min_n2, int max_n2, long freq_min,
417 			    long freq_max, unsigned int *mdiv,
418 			    unsigned int *ndiv, unsigned int *r)
419 {
420 	long diff, best_diff;
421 	unsigned int m;
422 	unsigned char n1, n2, best_n1=16+2, best_n2=2, best_m=125+2;
423 
424 	if (freq < freq_min / (1 << max_n2)) {
425 		printk(KERN_ERR "invalid frequency %ld Khz\n", freq);
426 		freq = freq_min / (1 << max_n2);
427 	}
428 	if (freq > freq_max / (1 << min_n2)) {
429 		printk(KERN_ERR "invalid frequency %ld Khz\n", freq);
430 		freq = freq_max / (1 << min_n2);
431 	}
432 
433 	/* work out suitable timings */
434 	best_diff = freq;
435 
436 	for (n2=min_n2; n2<=max_n2; n2++) {
437 		for (n1=min_n1+2; n1<=max_n1+2; n1++) {
438 			m = (freq * n1 * (1 << n2) + HALF_BASE_FREQ) /
439 				BASE_FREQ;
440 			if (m < min_m+2 || m > 127+2)
441 				continue;
442 			if ((m * BASE_FREQ >= freq_min * n1) &&
443 			    (m * BASE_FREQ <= freq_max * n1)) {
444 				diff = freq * (1 << n2) * n1 - BASE_FREQ * m;
445 				if (diff < 0)
446 					diff = -diff;
447 				if (diff < best_diff) {
448 					best_diff = diff;
449 					best_m = m;
450 					best_n1 = n1;
451 					best_n2 = n2;
452 				}
453 			}
454 		}
455 	}
456 
457 	*ndiv = best_n1 - 2;
458 	*r = best_n2;
459 	*mdiv = best_m - 2;
460 }
461 
462 static int common_calc_clock(long freq, int min_m, int min_n1, int max_n1,
463 			     int min_n2, int max_n2, long freq_min,
464 			     long freq_max, unsigned char *mdiv,
465 			     unsigned char *ndiv)
466 {
467 	long diff, best_diff;
468 	unsigned int m;
469 	unsigned char n1, n2;
470 	unsigned char best_n1 = 16+2, best_n2 = 2, best_m = 125+2;
471 
472 	best_diff = freq;
473 
474 	for (n2 = min_n2; n2 <= max_n2; n2++) {
475 		for (n1 = min_n1+2; n1 <= max_n1+2; n1++) {
476 			m = (freq * n1 * (1 << n2) + HALF_BASE_FREQ) /
477 				BASE_FREQ;
478 			if (m < min_m + 2 || m > 127+2)
479 				continue;
480 			if ((m * BASE_FREQ >= freq_min * n1) &&
481 			    (m * BASE_FREQ <= freq_max * n1)) {
482 				diff = freq * (1 << n2) * n1 - BASE_FREQ * m;
483 				if (diff < 0)
484 					diff = -diff;
485 				if (diff < best_diff) {
486 					best_diff = diff;
487 					best_m = m;
488 					best_n1 = n1;
489 					best_n2 = n2;
490 				}
491 			}
492 		}
493 	}
494 
495 	if (max_n1 == 63)
496 		*ndiv = (best_n1 - 2) | (best_n2 << 6);
497 	else
498 		*ndiv = (best_n1 - 2) | (best_n2 << 5);
499 
500 	*mdiv = best_m - 2;
501 
502 	return 0;
503 }
504 
505 #ifdef SAVAGEFB_DEBUG
506 /* This function is used to debug, it prints out the contents of s3 regs */
507 
508 static void SavagePrintRegs(struct savagefb_par *par)
509 {
510 	unsigned char i;
511 	int vgaCRIndex = 0x3d4;
512 	int vgaCRReg = 0x3d5;
513 
514 	printk(KERN_DEBUG "SR    x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE "
515 	       "xF");
516 
517 	for (i = 0; i < 0x70; i++) {
518 		if (!(i % 16))
519 			printk(KERN_DEBUG "\nSR%xx ", i >> 4);
520 		vga_out8(0x3c4, i, par);
521 		printk(KERN_DEBUG " %02x", vga_in8(0x3c5, par));
522 	}
523 
524 	printk(KERN_DEBUG "\n\nCR    x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC "
525 	       "xD xE xF");
526 
527 	for (i = 0; i < 0xB7; i++) {
528 		if (!(i % 16))
529 			printk(KERN_DEBUG "\nCR%xx ", i >> 4);
530 		vga_out8(vgaCRIndex, i, par);
531 		printk(KERN_DEBUG " %02x", vga_in8(vgaCRReg, par));
532 	}
533 
534 	printk(KERN_DEBUG "\n\n");
535 }
536 #endif
537 
538 /* --------------------------------------------------------------------- */
539 
540 static void savage_get_default_par(struct savagefb_par *par, struct savage_reg *reg)
541 {
542 	unsigned char cr3a, cr53, cr66;
543 
544 	vga_out16(0x3d4, 0x4838, par);
545 	vga_out16(0x3d4, 0xa039, par);
546 	vga_out16(0x3c4, 0x0608, par);
547 
548 	vga_out8(0x3d4, 0x66, par);
549 	cr66 = vga_in8(0x3d5, par);
550 	vga_out8(0x3d5, cr66 | 0x80, par);
551 	vga_out8(0x3d4, 0x3a, par);
552 	cr3a = vga_in8(0x3d5, par);
553 	vga_out8(0x3d5, cr3a | 0x80, par);
554 	vga_out8(0x3d4, 0x53, par);
555 	cr53 = vga_in8(0x3d5, par);
556 	vga_out8(0x3d5, cr53 & 0x7f, par);
557 
558 	vga_out8(0x3d4, 0x66, par);
559 	vga_out8(0x3d5, cr66, par);
560 	vga_out8(0x3d4, 0x3a, par);
561 	vga_out8(0x3d5, cr3a, par);
562 
563 	vga_out8(0x3d4, 0x66, par);
564 	vga_out8(0x3d5, cr66, par);
565 	vga_out8(0x3d4, 0x3a, par);
566 	vga_out8(0x3d5, cr3a, par);
567 
568 	/* unlock extended seq regs */
569 	vga_out8(0x3c4, 0x08, par);
570 	reg->SR08 = vga_in8(0x3c5, par);
571 	vga_out8(0x3c5, 0x06, par);
572 
573 	/* now save all the extended regs we need */
574 	vga_out8(0x3d4, 0x31, par);
575 	reg->CR31 = vga_in8(0x3d5, par);
576 	vga_out8(0x3d4, 0x32, par);
577 	reg->CR32 = vga_in8(0x3d5, par);
578 	vga_out8(0x3d4, 0x34, par);
579 	reg->CR34 = vga_in8(0x3d5, par);
580 	vga_out8(0x3d4, 0x36, par);
581 	reg->CR36 = vga_in8(0x3d5, par);
582 	vga_out8(0x3d4, 0x3a, par);
583 	reg->CR3A = vga_in8(0x3d5, par);
584 	vga_out8(0x3d4, 0x40, par);
585 	reg->CR40 = vga_in8(0x3d5, par);
586 	vga_out8(0x3d4, 0x42, par);
587 	reg->CR42 = vga_in8(0x3d5, par);
588 	vga_out8(0x3d4, 0x45, par);
589 	reg->CR45 = vga_in8(0x3d5, par);
590 	vga_out8(0x3d4, 0x50, par);
591 	reg->CR50 = vga_in8(0x3d5, par);
592 	vga_out8(0x3d4, 0x51, par);
593 	reg->CR51 = vga_in8(0x3d5, par);
594 	vga_out8(0x3d4, 0x53, par);
595 	reg->CR53 = vga_in8(0x3d5, par);
596 	vga_out8(0x3d4, 0x58, par);
597 	reg->CR58 = vga_in8(0x3d5, par);
598 	vga_out8(0x3d4, 0x60, par);
599 	reg->CR60 = vga_in8(0x3d5, par);
600 	vga_out8(0x3d4, 0x66, par);
601 	reg->CR66 = vga_in8(0x3d5, par);
602 	vga_out8(0x3d4, 0x67, par);
603 	reg->CR67 = vga_in8(0x3d5, par);
604 	vga_out8(0x3d4, 0x68, par);
605 	reg->CR68 = vga_in8(0x3d5, par);
606 	vga_out8(0x3d4, 0x69, par);
607 	reg->CR69 = vga_in8(0x3d5, par);
608 	vga_out8(0x3d4, 0x6f, par);
609 	reg->CR6F = vga_in8(0x3d5, par);
610 
611 	vga_out8(0x3d4, 0x33, par);
612 	reg->CR33 = vga_in8(0x3d5, par);
613 	vga_out8(0x3d4, 0x86, par);
614 	reg->CR86 = vga_in8(0x3d5, par);
615 	vga_out8(0x3d4, 0x88, par);
616 	reg->CR88 = vga_in8(0x3d5, par);
617 	vga_out8(0x3d4, 0x90, par);
618 	reg->CR90 = vga_in8(0x3d5, par);
619 	vga_out8(0x3d4, 0x91, par);
620 	reg->CR91 = vga_in8(0x3d5, par);
621 	vga_out8(0x3d4, 0xb0, par);
622 	reg->CRB0 = vga_in8(0x3d5, par) | 0x80;
623 
624 	/* extended mode timing regs */
625 	vga_out8(0x3d4, 0x3b, par);
626 	reg->CR3B = vga_in8(0x3d5, par);
627 	vga_out8(0x3d4, 0x3c, par);
628 	reg->CR3C = vga_in8(0x3d5, par);
629 	vga_out8(0x3d4, 0x43, par);
630 	reg->CR43 = vga_in8(0x3d5, par);
631 	vga_out8(0x3d4, 0x5d, par);
632 	reg->CR5D = vga_in8(0x3d5, par);
633 	vga_out8(0x3d4, 0x5e, par);
634 	reg->CR5E = vga_in8(0x3d5, par);
635 	vga_out8(0x3d4, 0x65, par);
636 	reg->CR65 = vga_in8(0x3d5, par);
637 
638 	/* save seq extended regs for DCLK PLL programming */
639 	vga_out8(0x3c4, 0x0e, par);
640 	reg->SR0E = vga_in8(0x3c5, par);
641 	vga_out8(0x3c4, 0x0f, par);
642 	reg->SR0F = vga_in8(0x3c5, par);
643 	vga_out8(0x3c4, 0x10, par);
644 	reg->SR10 = vga_in8(0x3c5, par);
645 	vga_out8(0x3c4, 0x11, par);
646 	reg->SR11 = vga_in8(0x3c5, par);
647 	vga_out8(0x3c4, 0x12, par);
648 	reg->SR12 = vga_in8(0x3c5, par);
649 	vga_out8(0x3c4, 0x13, par);
650 	reg->SR13 = vga_in8(0x3c5, par);
651 	vga_out8(0x3c4, 0x29, par);
652 	reg->SR29 = vga_in8(0x3c5, par);
653 
654 	vga_out8(0x3c4, 0x15, par);
655 	reg->SR15 = vga_in8(0x3c5, par);
656 	vga_out8(0x3c4, 0x30, par);
657 	reg->SR30 = vga_in8(0x3c5, par);
658 	vga_out8(0x3c4, 0x18, par);
659 	reg->SR18 = vga_in8(0x3c5, par);
660 
661 	/* Save flat panel expansion registers. */
662 	if (par->chip == S3_SAVAGE_MX) {
663 		int i;
664 
665 		for (i = 0; i < 8; i++) {
666 			vga_out8(0x3c4, 0x54+i, par);
667 			reg->SR54[i] = vga_in8(0x3c5, par);
668 		}
669 	}
670 
671 	vga_out8(0x3d4, 0x66, par);
672 	cr66 = vga_in8(0x3d5, par);
673 	vga_out8(0x3d5, cr66 | 0x80, par);
674 	vga_out8(0x3d4, 0x3a, par);
675 	cr3a = vga_in8(0x3d5, par);
676 	vga_out8(0x3d5, cr3a | 0x80, par);
677 
678 	/* now save MIU regs */
679 	if (par->chip != S3_SAVAGE_MX) {
680 		reg->MMPR0 = savage_in32(FIFO_CONTROL_REG, par);
681 		reg->MMPR1 = savage_in32(MIU_CONTROL_REG, par);
682 		reg->MMPR2 = savage_in32(STREAMS_TIMEOUT_REG, par);
683 		reg->MMPR3 = savage_in32(MISC_TIMEOUT_REG, par);
684 	}
685 
686 	vga_out8(0x3d4, 0x3a, par);
687 	vga_out8(0x3d5, cr3a, par);
688 	vga_out8(0x3d4, 0x66, par);
689 	vga_out8(0x3d5, cr66, par);
690 }
691 
692 static void savage_set_default_par(struct savagefb_par *par,
693 				struct savage_reg *reg)
694 {
695 	unsigned char cr3a, cr53, cr66;
696 
697 	vga_out16(0x3d4, 0x4838, par);
698 	vga_out16(0x3d4, 0xa039, par);
699 	vga_out16(0x3c4, 0x0608, par);
700 
701 	vga_out8(0x3d4, 0x66, par);
702 	cr66 = vga_in8(0x3d5, par);
703 	vga_out8(0x3d5, cr66 | 0x80, par);
704 	vga_out8(0x3d4, 0x3a, par);
705 	cr3a = vga_in8(0x3d5, par);
706 	vga_out8(0x3d5, cr3a | 0x80, par);
707 	vga_out8(0x3d4, 0x53, par);
708 	cr53 = vga_in8(0x3d5, par);
709 	vga_out8(0x3d5, cr53 & 0x7f, par);
710 
711 	vga_out8(0x3d4, 0x66, par);
712 	vga_out8(0x3d5, cr66, par);
713 	vga_out8(0x3d4, 0x3a, par);
714 	vga_out8(0x3d5, cr3a, par);
715 
716 	vga_out8(0x3d4, 0x66, par);
717 	vga_out8(0x3d5, cr66, par);
718 	vga_out8(0x3d4, 0x3a, par);
719 	vga_out8(0x3d5, cr3a, par);
720 
721 	/* unlock extended seq regs */
722 	vga_out8(0x3c4, 0x08, par);
723 	vga_out8(0x3c5, reg->SR08, par);
724 	vga_out8(0x3c5, 0x06, par);
725 
726 	/* now restore all the extended regs we need */
727 	vga_out8(0x3d4, 0x31, par);
728 	vga_out8(0x3d5, reg->CR31, par);
729 	vga_out8(0x3d4, 0x32, par);
730 	vga_out8(0x3d5, reg->CR32, par);
731 	vga_out8(0x3d4, 0x34, par);
732 	vga_out8(0x3d5, reg->CR34, par);
733 	vga_out8(0x3d4, 0x36, par);
734 	vga_out8(0x3d5,reg->CR36, par);
735 	vga_out8(0x3d4, 0x3a, par);
736 	vga_out8(0x3d5, reg->CR3A, par);
737 	vga_out8(0x3d4, 0x40, par);
738 	vga_out8(0x3d5, reg->CR40, par);
739 	vga_out8(0x3d4, 0x42, par);
740 	vga_out8(0x3d5, reg->CR42, par);
741 	vga_out8(0x3d4, 0x45, par);
742 	vga_out8(0x3d5, reg->CR45, par);
743 	vga_out8(0x3d4, 0x50, par);
744 	vga_out8(0x3d5, reg->CR50, par);
745 	vga_out8(0x3d4, 0x51, par);
746 	vga_out8(0x3d5, reg->CR51, par);
747 	vga_out8(0x3d4, 0x53, par);
748 	vga_out8(0x3d5, reg->CR53, par);
749 	vga_out8(0x3d4, 0x58, par);
750 	vga_out8(0x3d5, reg->CR58, par);
751 	vga_out8(0x3d4, 0x60, par);
752 	vga_out8(0x3d5, reg->CR60, par);
753 	vga_out8(0x3d4, 0x66, par);
754 	vga_out8(0x3d5, reg->CR66, par);
755 	vga_out8(0x3d4, 0x67, par);
756 	vga_out8(0x3d5, reg->CR67, par);
757 	vga_out8(0x3d4, 0x68, par);
758 	vga_out8(0x3d5, reg->CR68, par);
759 	vga_out8(0x3d4, 0x69, par);
760 	vga_out8(0x3d5, reg->CR69, par);
761 	vga_out8(0x3d4, 0x6f, par);
762 	vga_out8(0x3d5, reg->CR6F, par);
763 
764 	vga_out8(0x3d4, 0x33, par);
765 	vga_out8(0x3d5, reg->CR33, par);
766 	vga_out8(0x3d4, 0x86, par);
767 	vga_out8(0x3d5, reg->CR86, par);
768 	vga_out8(0x3d4, 0x88, par);
769 	vga_out8(0x3d5, reg->CR88, par);
770 	vga_out8(0x3d4, 0x90, par);
771 	vga_out8(0x3d5, reg->CR90, par);
772 	vga_out8(0x3d4, 0x91, par);
773 	vga_out8(0x3d5, reg->CR91, par);
774 	vga_out8(0x3d4, 0xb0, par);
775 	vga_out8(0x3d5, reg->CRB0, par);
776 
777 	/* extended mode timing regs */
778 	vga_out8(0x3d4, 0x3b, par);
779 	vga_out8(0x3d5, reg->CR3B, par);
780 	vga_out8(0x3d4, 0x3c, par);
781 	vga_out8(0x3d5, reg->CR3C, par);
782 	vga_out8(0x3d4, 0x43, par);
783 	vga_out8(0x3d5, reg->CR43, par);
784 	vga_out8(0x3d4, 0x5d, par);
785 	vga_out8(0x3d5, reg->CR5D, par);
786 	vga_out8(0x3d4, 0x5e, par);
787 	vga_out8(0x3d5, reg->CR5E, par);
788 	vga_out8(0x3d4, 0x65, par);
789 	vga_out8(0x3d5, reg->CR65, par);
790 
791 	/* save seq extended regs for DCLK PLL programming */
792 	vga_out8(0x3c4, 0x0e, par);
793 	vga_out8(0x3c5, reg->SR0E, par);
794 	vga_out8(0x3c4, 0x0f, par);
795 	vga_out8(0x3c5, reg->SR0F, par);
796 	vga_out8(0x3c4, 0x10, par);
797 	vga_out8(0x3c5, reg->SR10, par);
798 	vga_out8(0x3c4, 0x11, par);
799 	vga_out8(0x3c5, reg->SR11, par);
800 	vga_out8(0x3c4, 0x12, par);
801 	vga_out8(0x3c5, reg->SR12, par);
802 	vga_out8(0x3c4, 0x13, par);
803 	vga_out8(0x3c5, reg->SR13, par);
804 	vga_out8(0x3c4, 0x29, par);
805 	vga_out8(0x3c5, reg->SR29, par);
806 
807 	vga_out8(0x3c4, 0x15, par);
808 	vga_out8(0x3c5, reg->SR15, par);
809 	vga_out8(0x3c4, 0x30, par);
810 	vga_out8(0x3c5, reg->SR30, par);
811 	vga_out8(0x3c4, 0x18, par);
812 	vga_out8(0x3c5, reg->SR18, par);
813 
814 	/* Save flat panel expansion registers. */
815 	if (par->chip == S3_SAVAGE_MX) {
816 		int i;
817 
818 		for (i = 0; i < 8; i++) {
819 			vga_out8(0x3c4, 0x54+i, par);
820 			vga_out8(0x3c5, reg->SR54[i], par);
821 		}
822 	}
823 
824 	vga_out8(0x3d4, 0x66, par);
825 	cr66 = vga_in8(0x3d5, par);
826 	vga_out8(0x3d5, cr66 | 0x80, par);
827 	vga_out8(0x3d4, 0x3a, par);
828 	cr3a = vga_in8(0x3d5, par);
829 	vga_out8(0x3d5, cr3a | 0x80, par);
830 
831 	/* now save MIU regs */
832 	if (par->chip != S3_SAVAGE_MX) {
833 		savage_out32(FIFO_CONTROL_REG, reg->MMPR0, par);
834 		savage_out32(MIU_CONTROL_REG, reg->MMPR1, par);
835 		savage_out32(STREAMS_TIMEOUT_REG, reg->MMPR2, par);
836 		savage_out32(MISC_TIMEOUT_REG, reg->MMPR3, par);
837 	}
838 
839 	vga_out8(0x3d4, 0x3a, par);
840 	vga_out8(0x3d5, cr3a, par);
841 	vga_out8(0x3d4, 0x66, par);
842 	vga_out8(0x3d5, cr66, par);
843 }
844 
845 static void savage_update_var(struct fb_var_screeninfo *var,
846 			      const struct fb_videomode *modedb)
847 {
848 	var->xres = var->xres_virtual = modedb->xres;
849 	var->yres = modedb->yres;
850         if (var->yres_virtual < var->yres)
851 	    var->yres_virtual = var->yres;
852         var->xoffset = var->yoffset = 0;
853         var->pixclock = modedb->pixclock;
854         var->left_margin = modedb->left_margin;
855         var->right_margin = modedb->right_margin;
856         var->upper_margin = modedb->upper_margin;
857         var->lower_margin = modedb->lower_margin;
858         var->hsync_len = modedb->hsync_len;
859         var->vsync_len = modedb->vsync_len;
860         var->sync = modedb->sync;
861         var->vmode = modedb->vmode;
862 }
863 
864 static int savagefb_check_var(struct fb_var_screeninfo   *var,
865 			      struct fb_info *info)
866 {
867 	struct savagefb_par *par = info->par;
868 	int memlen, vramlen, mode_valid = 0;
869 
870 	DBG("savagefb_check_var");
871 
872 	var->transp.offset = 0;
873 	var->transp.length = 0;
874 	switch (var->bits_per_pixel) {
875 	case 8:
876 		var->red.offset = var->green.offset =
877 			var->blue.offset = 0;
878 		var->red.length = var->green.length =
879 			var->blue.length = var->bits_per_pixel;
880 		break;
881 	case 16:
882 		var->red.offset = 11;
883 		var->red.length = 5;
884 		var->green.offset = 5;
885 		var->green.length = 6;
886 		var->blue.offset = 0;
887 		var->blue.length = 5;
888 		break;
889 	case 32:
890 		var->transp.offset = 24;
891 		var->transp.length = 8;
892 		var->red.offset = 16;
893 		var->red.length = 8;
894 		var->green.offset = 8;
895 		var->green.length = 8;
896 		var->blue.offset = 0;
897 		var->blue.length = 8;
898 		break;
899 
900 	default:
901 		return -EINVAL;
902 	}
903 
904 	if (!info->monspecs.hfmax || !info->monspecs.vfmax ||
905 	    !info->monspecs.dclkmax || !fb_validate_mode(var, info))
906 		mode_valid = 1;
907 
908 	/* calculate modeline if supported by monitor */
909 	if (!mode_valid && info->monspecs.gtf) {
910 		if (!fb_get_mode(FB_MAXTIMINGS, 0, var, info))
911 			mode_valid = 1;
912 	}
913 
914 	if (!mode_valid) {
915 		const struct fb_videomode *mode;
916 
917 		mode = fb_find_best_mode(var, &info->modelist);
918 		if (mode) {
919 			savage_update_var(var, mode);
920 			mode_valid = 1;
921 		}
922 	}
923 
924 	if (!mode_valid && info->monspecs.modedb_len)
925 		return -EINVAL;
926 
927 	/* Is the mode larger than the LCD panel? */
928 	if (par->SavagePanelWidth &&
929 	    (var->xres > par->SavagePanelWidth ||
930 	     var->yres > par->SavagePanelHeight)) {
931 		printk(KERN_INFO "Mode (%dx%d) larger than the LCD panel "
932 		       "(%dx%d)\n", var->xres,  var->yres,
933 		       par->SavagePanelWidth,
934 		       par->SavagePanelHeight);
935 		return -1;
936 	}
937 
938 	if (var->yres_virtual < var->yres)
939 		var->yres_virtual = var->yres;
940 	if (var->xres_virtual < var->xres)
941 		var->xres_virtual = var->xres;
942 
943 	vramlen = info->fix.smem_len;
944 
945 	memlen = var->xres_virtual * var->bits_per_pixel *
946 		var->yres_virtual / 8;
947 	if (memlen > vramlen) {
948 		var->yres_virtual = vramlen * 8 /
949 			(var->xres_virtual * var->bits_per_pixel);
950 		memlen = var->xres_virtual * var->bits_per_pixel *
951 			var->yres_virtual / 8;
952 	}
953 
954 	/* we must round yres/xres down, we already rounded y/xres_virtual up
955 	   if it was possible. We should return -EINVAL, but I disagree */
956 	if (var->yres_virtual < var->yres)
957 		var->yres = var->yres_virtual;
958 	if (var->xres_virtual < var->xres)
959 		var->xres = var->xres_virtual;
960 	if (var->xoffset + var->xres > var->xres_virtual)
961 		var->xoffset = var->xres_virtual - var->xres;
962 	if (var->yoffset + var->yres > var->yres_virtual)
963 		var->yoffset = var->yres_virtual - var->yres;
964 
965 	return 0;
966 }
967 
968 
969 static int savagefb_decode_var(struct fb_var_screeninfo   *var,
970 			       struct savagefb_par        *par,
971 			       struct savage_reg          *reg)
972 {
973 	struct xtimings timings;
974 	int width, dclk, i, j; /*, refresh; */
975 	unsigned int m, n, r;
976 	unsigned char tmp = 0;
977 	unsigned int pixclock = var->pixclock;
978 
979 	DBG("savagefb_decode_var");
980 
981 	memset(&timings, 0, sizeof(timings));
982 
983 	if (!pixclock) pixclock = 10000;	/* 10ns = 100MHz */
984 	timings.Clock = 1000000000 / pixclock;
985 	if (timings.Clock < 1) timings.Clock = 1;
986 	timings.dblscan = var->vmode & FB_VMODE_DOUBLE;
987 	timings.interlaced = var->vmode & FB_VMODE_INTERLACED;
988 	timings.HDisplay = var->xres;
989 	timings.HSyncStart = timings.HDisplay + var->right_margin;
990 	timings.HSyncEnd = timings.HSyncStart + var->hsync_len;
991 	timings.HTotal = timings.HSyncEnd + var->left_margin;
992 	timings.VDisplay = var->yres;
993 	timings.VSyncStart = timings.VDisplay + var->lower_margin;
994 	timings.VSyncEnd = timings.VSyncStart + var->vsync_len;
995 	timings.VTotal = timings.VSyncEnd + var->upper_margin;
996 	timings.sync = var->sync;
997 
998 
999 	par->depth  = var->bits_per_pixel;
1000 	par->vwidth = var->xres_virtual;
1001 
1002 	if (var->bits_per_pixel == 16  &&  par->chip == S3_SAVAGE3D) {
1003 		timings.HDisplay *= 2;
1004 		timings.HSyncStart *= 2;
1005 		timings.HSyncEnd *= 2;
1006 		timings.HTotal *= 2;
1007 	}
1008 
1009 	/*
1010 	 * This will allocate the datastructure and initialize all of the
1011 	 * generic VGA registers.
1012 	 */
1013 	vgaHWInit(var, par, &timings, reg);
1014 
1015 	/* We need to set CR67 whether or not we use the BIOS. */
1016 
1017 	dclk = timings.Clock;
1018 	reg->CR67 = 0x00;
1019 
1020 	switch(var->bits_per_pixel) {
1021 	case 8:
1022 		if ((par->chip == S3_SAVAGE2000) && (dclk >= 230000))
1023 			reg->CR67 = 0x10;	/* 8bpp, 2 pixels/clock */
1024 		else
1025 			reg->CR67 = 0x00;	/* 8bpp, 1 pixel/clock */
1026 		break;
1027 	case 15:
1028 		if (S3_SAVAGE_MOBILE_SERIES(par->chip) ||
1029 		    ((par->chip == S3_SAVAGE2000) && (dclk >= 230000)))
1030 			reg->CR67 = 0x30;	/* 15bpp, 2 pixel/clock */
1031 		else
1032 			reg->CR67 = 0x20;	/* 15bpp, 1 pixels/clock */
1033 		break;
1034 	case 16:
1035 		if (S3_SAVAGE_MOBILE_SERIES(par->chip) ||
1036 		   ((par->chip == S3_SAVAGE2000) && (dclk >= 230000)))
1037 			reg->CR67 = 0x50;	/* 16bpp, 2 pixel/clock */
1038 		else
1039 			reg->CR67 = 0x40;	/* 16bpp, 1 pixels/clock */
1040 		break;
1041 	case 24:
1042 		reg->CR67 = 0x70;
1043 		break;
1044 	case 32:
1045 		reg->CR67 = 0xd0;
1046 		break;
1047 	}
1048 
1049 	/*
1050 	 * Either BIOS use is disabled, or we failed to find a suitable
1051 	 * match.  Fall back to traditional register-crunching.
1052 	 */
1053 
1054 	vga_out8(0x3d4, 0x3a, par);
1055 	tmp = vga_in8(0x3d5, par);
1056 	if (1 /*FIXME:psav->pci_burst*/)
1057 		reg->CR3A = (tmp & 0x7f) | 0x15;
1058 	else
1059 		reg->CR3A = tmp | 0x95;
1060 
1061 	reg->CR53 = 0x00;
1062 	reg->CR31 = 0x8c;
1063 	reg->CR66 = 0x89;
1064 
1065 	vga_out8(0x3d4, 0x58, par);
1066 	reg->CR58 = vga_in8(0x3d5, par) & 0x80;
1067 	reg->CR58 |= 0x13;
1068 
1069 	reg->SR15 = 0x03 | 0x80;
1070 	reg->SR18 = 0x00;
1071 	reg->CR43 = reg->CR45 = reg->CR65 = 0x00;
1072 
1073 	vga_out8(0x3d4, 0x40, par);
1074 	reg->CR40 = vga_in8(0x3d5, par) & ~0x01;
1075 
1076 	reg->MMPR0 = 0x010400;
1077 	reg->MMPR1 = 0x00;
1078 	reg->MMPR2 = 0x0808;
1079 	reg->MMPR3 = 0x08080810;
1080 
1081 	SavageCalcClock(dclk, 1, 1, 127, 0, 4, 180000, 360000, &m, &n, &r);
1082 	/* m = 107; n = 4; r = 2; */
1083 
1084 	if (par->MCLK <= 0) {
1085 		reg->SR10 = 255;
1086 		reg->SR11 = 255;
1087 	} else {
1088 		common_calc_clock(par->MCLK, 1, 1, 31, 0, 3, 135000, 270000,
1089 				   &reg->SR11, &reg->SR10);
1090 		/*      reg->SR10 = 80; // MCLK == 286000 */
1091 		/*      reg->SR11 = 125; */
1092 	}
1093 
1094 	reg->SR12 = (r << 6) | (n & 0x3f);
1095 	reg->SR13 = m & 0xff;
1096 	reg->SR29 = (r & 4) | (m & 0x100) >> 5 | (n & 0x40) >> 2;
1097 
1098 	if (var->bits_per_pixel < 24)
1099 		reg->MMPR0 -= 0x8000;
1100 	else
1101 		reg->MMPR0 -= 0x4000;
1102 
1103 	if (timings.interlaced)
1104 		reg->CR42 = 0x20;
1105 	else
1106 		reg->CR42 = 0x00;
1107 
1108 	reg->CR34 = 0x10; /* display fifo */
1109 
1110 	i = ((((timings.HTotal >> 3) - 5) & 0x100) >> 8) |
1111 		((((timings.HDisplay >> 3) - 1) & 0x100) >> 7) |
1112 		((((timings.HSyncStart >> 3) - 1) & 0x100) >> 6) |
1113 		((timings.HSyncStart & 0x800) >> 7);
1114 
1115 	if ((timings.HSyncEnd >> 3) - (timings.HSyncStart >> 3) > 64)
1116 		i |= 0x08;
1117 	if ((timings.HSyncEnd >> 3) - (timings.HSyncStart >> 3) > 32)
1118 		i |= 0x20;
1119 
1120 	j = (reg->CRTC[0] + ((i & 0x01) << 8) +
1121 	     reg->CRTC[4] + ((i & 0x10) << 4) + 1) / 2;
1122 
1123 	if (j - (reg->CRTC[4] + ((i & 0x10) << 4)) < 4) {
1124 		if (reg->CRTC[4] + ((i & 0x10) << 4) + 4 <=
1125 		    reg->CRTC[0] + ((i & 0x01) << 8))
1126 			j = reg->CRTC[4] + ((i & 0x10) << 4) + 4;
1127 		else
1128 			j = reg->CRTC[0] + ((i & 0x01) << 8) + 1;
1129 	}
1130 
1131 	reg->CR3B = j & 0xff;
1132 	i |= (j & 0x100) >> 2;
1133 	reg->CR3C = (reg->CRTC[0] + ((i & 0x01) << 8)) / 2;
1134 	reg->CR5D = i;
1135 	reg->CR5E = (((timings.VTotal - 2) & 0x400) >> 10) |
1136 		(((timings.VDisplay - 1) & 0x400) >> 9) |
1137 		(((timings.VSyncStart) & 0x400) >> 8) |
1138 		(((timings.VSyncStart) & 0x400) >> 6) | 0x40;
1139 	width = (var->xres_virtual * ((var->bits_per_pixel+7) / 8)) >> 3;
1140 	reg->CR91 = reg->CRTC[19] = 0xff & width;
1141 	reg->CR51 = (0x300 & width) >> 4;
1142 	reg->CR90 = 0x80 | (width >> 8);
1143 	reg->MiscOutReg |= 0x0c;
1144 
1145 	/* Set frame buffer description. */
1146 
1147 	if (var->bits_per_pixel <= 8)
1148 		reg->CR50 = 0;
1149 	else if (var->bits_per_pixel <= 16)
1150 		reg->CR50 = 0x10;
1151 	else
1152 		reg->CR50 = 0x30;
1153 
1154 	if (var->xres_virtual <= 640)
1155 		reg->CR50 |= 0x40;
1156 	else if (var->xres_virtual == 800)
1157 		reg->CR50 |= 0x80;
1158 	else if (var->xres_virtual == 1024)
1159 		reg->CR50 |= 0x00;
1160 	else if (var->xres_virtual == 1152)
1161 		reg->CR50 |= 0x01;
1162 	else if (var->xres_virtual == 1280)
1163 		reg->CR50 |= 0xc0;
1164 	else if (var->xres_virtual == 1600)
1165 		reg->CR50 |= 0x81;
1166 	else
1167 		reg->CR50 |= 0xc1;	/* Use GBD */
1168 
1169 	if (par->chip == S3_SAVAGE2000)
1170 		reg->CR33 = 0x08;
1171 	else
1172 		reg->CR33 = 0x20;
1173 
1174 	reg->CRTC[0x17] = 0xeb;
1175 
1176 	reg->CR67 |= 1;
1177 
1178 	vga_out8(0x3d4, 0x36, par);
1179 	reg->CR36 = vga_in8(0x3d5, par);
1180 	vga_out8(0x3d4, 0x68, par);
1181 	reg->CR68 = vga_in8(0x3d5, par);
1182 	reg->CR69 = 0;
1183 	vga_out8(0x3d4, 0x6f, par);
1184 	reg->CR6F = vga_in8(0x3d5, par);
1185 	vga_out8(0x3d4, 0x86, par);
1186 	reg->CR86 = vga_in8(0x3d5, par);
1187 	vga_out8(0x3d4, 0x88, par);
1188 	reg->CR88 = vga_in8(0x3d5, par) | 0x08;
1189 	vga_out8(0x3d4, 0xb0, par);
1190 	reg->CRB0 = vga_in8(0x3d5, par) | 0x80;
1191 
1192 	return 0;
1193 }
1194 
1195 /* --------------------------------------------------------------------- */
1196 
1197 /*
1198  *    Set a single color register. Return != 0 for invalid regno.
1199  */
1200 static int savagefb_setcolreg(unsigned        regno,
1201 			      unsigned        red,
1202 			      unsigned        green,
1203 			      unsigned        blue,
1204 			      unsigned        transp,
1205 			      struct fb_info *info)
1206 {
1207 	struct savagefb_par *par = info->par;
1208 
1209 	if (regno >= NR_PALETTE)
1210 		return -EINVAL;
1211 
1212 	par->palette[regno].red    = red;
1213 	par->palette[regno].green  = green;
1214 	par->palette[regno].blue   = blue;
1215 	par->palette[regno].transp = transp;
1216 
1217 	switch (info->var.bits_per_pixel) {
1218 	case 8:
1219 		vga_out8(0x3c8, regno, par);
1220 
1221 		vga_out8(0x3c9, red   >> 10, par);
1222 		vga_out8(0x3c9, green >> 10, par);
1223 		vga_out8(0x3c9, blue  >> 10, par);
1224 		break;
1225 
1226 	case 16:
1227 		if (regno < 16)
1228 			((u32 *)info->pseudo_palette)[regno] =
1229 				((red   & 0xf800)      ) |
1230 				((green & 0xfc00) >>  5) |
1231 				((blue  & 0xf800) >> 11);
1232 		break;
1233 
1234 	case 24:
1235 		if (regno < 16)
1236 			((u32 *)info->pseudo_palette)[regno] =
1237 				((red    & 0xff00) <<  8) |
1238 				((green  & 0xff00)      ) |
1239 				((blue   & 0xff00) >>  8);
1240 		break;
1241 	case 32:
1242 		if (regno < 16)
1243 			((u32 *)info->pseudo_palette)[regno] =
1244 				((transp & 0xff00) << 16) |
1245 				((red    & 0xff00) <<  8) |
1246 				((green  & 0xff00)      ) |
1247 				((blue   & 0xff00) >>  8);
1248 		break;
1249 
1250 	default:
1251 		return 1;
1252 	}
1253 
1254 	return 0;
1255 }
1256 
1257 static void savagefb_set_par_int(struct savagefb_par  *par, struct savage_reg *reg)
1258 {
1259 	unsigned char tmp, cr3a, cr66, cr67;
1260 
1261 	DBG("savagefb_set_par_int");
1262 
1263 	par->SavageWaitIdle(par);
1264 
1265 	vga_out8(0x3c2, 0x23, par);
1266 
1267 	vga_out16(0x3d4, 0x4838, par);
1268 	vga_out16(0x3d4, 0xa539, par);
1269 	vga_out16(0x3c4, 0x0608, par);
1270 
1271 	vgaHWProtect(par, 1);
1272 
1273 	/*
1274 	 * Some Savage/MX and /IX systems go nuts when trying to exit the
1275 	 * server after WindowMaker has displayed a gradient background.  I
1276 	 * haven't been able to find what causes it, but a non-destructive
1277 	 * switch to mode 3 here seems to eliminate the issue.
1278 	 */
1279 
1280 	VerticalRetraceWait(par);
1281 	vga_out8(0x3d4, 0x67, par);
1282 	cr67 = vga_in8(0x3d5, par);
1283 	vga_out8(0x3d5, cr67/*par->CR67*/ & ~0x0c, par); /* no STREAMS yet */
1284 
1285 	vga_out8(0x3d4, 0x23, par);
1286 	vga_out8(0x3d5, 0x00, par);
1287 	vga_out8(0x3d4, 0x26, par);
1288 	vga_out8(0x3d5, 0x00, par);
1289 
1290 	/* restore extended regs */
1291 	vga_out8(0x3d4, 0x66, par);
1292 	vga_out8(0x3d5, reg->CR66, par);
1293 	vga_out8(0x3d4, 0x3a, par);
1294 	vga_out8(0x3d5, reg->CR3A, par);
1295 	vga_out8(0x3d4, 0x31, par);
1296 	vga_out8(0x3d5, reg->CR31, par);
1297 	vga_out8(0x3d4, 0x32, par);
1298 	vga_out8(0x3d5, reg->CR32, par);
1299 	vga_out8(0x3d4, 0x58, par);
1300 	vga_out8(0x3d5, reg->CR58, par);
1301 	vga_out8(0x3d4, 0x53, par);
1302 	vga_out8(0x3d5, reg->CR53 & 0x7f, par);
1303 
1304 	vga_out16(0x3c4, 0x0608, par);
1305 
1306 	/* Restore DCLK registers. */
1307 
1308 	vga_out8(0x3c4, 0x0e, par);
1309 	vga_out8(0x3c5, reg->SR0E, par);
1310 	vga_out8(0x3c4, 0x0f, par);
1311 	vga_out8(0x3c5, reg->SR0F, par);
1312 	vga_out8(0x3c4, 0x29, par);
1313 	vga_out8(0x3c5, reg->SR29, par);
1314 	vga_out8(0x3c4, 0x15, par);
1315 	vga_out8(0x3c5, reg->SR15, par);
1316 
1317 	/* Restore flat panel expansion registers. */
1318 	if (par->chip == S3_SAVAGE_MX) {
1319 		int i;
1320 
1321 		for (i = 0; i < 8; i++) {
1322 			vga_out8(0x3c4, 0x54+i, par);
1323 			vga_out8(0x3c5, reg->SR54[i], par);
1324 		}
1325 	}
1326 
1327 	vgaHWRestore (par, reg);
1328 
1329 	/* extended mode timing registers */
1330 	vga_out8(0x3d4, 0x53, par);
1331 	vga_out8(0x3d5, reg->CR53, par);
1332 	vga_out8(0x3d4, 0x5d, par);
1333 	vga_out8(0x3d5, reg->CR5D, par);
1334 	vga_out8(0x3d4, 0x5e, par);
1335 	vga_out8(0x3d5, reg->CR5E, par);
1336 	vga_out8(0x3d4, 0x3b, par);
1337 	vga_out8(0x3d5, reg->CR3B, par);
1338 	vga_out8(0x3d4, 0x3c, par);
1339 	vga_out8(0x3d5, reg->CR3C, par);
1340 	vga_out8(0x3d4, 0x43, par);
1341 	vga_out8(0x3d5, reg->CR43, par);
1342 	vga_out8(0x3d4, 0x65, par);
1343 	vga_out8(0x3d5, reg->CR65, par);
1344 
1345 	/* restore the desired video mode with cr67 */
1346 	vga_out8(0x3d4, 0x67, par);
1347 	/* following part not present in X11 driver */
1348 	cr67 = vga_in8(0x3d5, par) & 0xf;
1349 	vga_out8(0x3d5, 0x50 | cr67, par);
1350 	mdelay(10);
1351 	vga_out8(0x3d4, 0x67, par);
1352 	/* end of part */
1353 	vga_out8(0x3d5, reg->CR67 & ~0x0c, par);
1354 
1355 	/* other mode timing and extended regs */
1356 	vga_out8(0x3d4, 0x34, par);
1357 	vga_out8(0x3d5, reg->CR34, par);
1358 	vga_out8(0x3d4, 0x40, par);
1359 	vga_out8(0x3d5, reg->CR40, par);
1360 	vga_out8(0x3d4, 0x42, par);
1361 	vga_out8(0x3d5, reg->CR42, par);
1362 	vga_out8(0x3d4, 0x45, par);
1363 	vga_out8(0x3d5, reg->CR45, par);
1364 	vga_out8(0x3d4, 0x50, par);
1365 	vga_out8(0x3d5, reg->CR50, par);
1366 	vga_out8(0x3d4, 0x51, par);
1367 	vga_out8(0x3d5, reg->CR51, par);
1368 
1369 	/* memory timings */
1370 	vga_out8(0x3d4, 0x36, par);
1371 	vga_out8(0x3d5, reg->CR36, par);
1372 	vga_out8(0x3d4, 0x60, par);
1373 	vga_out8(0x3d5, reg->CR60, par);
1374 	vga_out8(0x3d4, 0x68, par);
1375 	vga_out8(0x3d5, reg->CR68, par);
1376 	vga_out8(0x3d4, 0x69, par);
1377 	vga_out8(0x3d5, reg->CR69, par);
1378 	vga_out8(0x3d4, 0x6f, par);
1379 	vga_out8(0x3d5, reg->CR6F, par);
1380 
1381 	vga_out8(0x3d4, 0x33, par);
1382 	vga_out8(0x3d5, reg->CR33, par);
1383 	vga_out8(0x3d4, 0x86, par);
1384 	vga_out8(0x3d5, reg->CR86, par);
1385 	vga_out8(0x3d4, 0x88, par);
1386 	vga_out8(0x3d5, reg->CR88, par);
1387 	vga_out8(0x3d4, 0x90, par);
1388 	vga_out8(0x3d5, reg->CR90, par);
1389 	vga_out8(0x3d4, 0x91, par);
1390 	vga_out8(0x3d5, reg->CR91, par);
1391 
1392 	if (par->chip == S3_SAVAGE4) {
1393 		vga_out8(0x3d4, 0xb0, par);
1394 		vga_out8(0x3d5, reg->CRB0, par);
1395 	}
1396 
1397 	vga_out8(0x3d4, 0x32, par);
1398 	vga_out8(0x3d5, reg->CR32, par);
1399 
1400 	/* unlock extended seq regs */
1401 	vga_out8(0x3c4, 0x08, par);
1402 	vga_out8(0x3c5, 0x06, par);
1403 
1404 	/* Restore extended sequencer regs for MCLK. SR10 == 255 indicates
1405 	 * that we should leave the default SR10 and SR11 values there.
1406 	 */
1407 	if (reg->SR10 != 255) {
1408 		vga_out8(0x3c4, 0x10, par);
1409 		vga_out8(0x3c5, reg->SR10, par);
1410 		vga_out8(0x3c4, 0x11, par);
1411 		vga_out8(0x3c5, reg->SR11, par);
1412 	}
1413 
1414 	/* restore extended seq regs for dclk */
1415 	vga_out8(0x3c4, 0x0e, par);
1416 	vga_out8(0x3c5, reg->SR0E, par);
1417 	vga_out8(0x3c4, 0x0f, par);
1418 	vga_out8(0x3c5, reg->SR0F, par);
1419 	vga_out8(0x3c4, 0x12, par);
1420 	vga_out8(0x3c5, reg->SR12, par);
1421 	vga_out8(0x3c4, 0x13, par);
1422 	vga_out8(0x3c5, reg->SR13, par);
1423 	vga_out8(0x3c4, 0x29, par);
1424 	vga_out8(0x3c5, reg->SR29, par);
1425 	vga_out8(0x3c4, 0x18, par);
1426 	vga_out8(0x3c5, reg->SR18, par);
1427 
1428 	/* load new m, n pll values for dclk & mclk */
1429 	vga_out8(0x3c4, 0x15, par);
1430 	tmp = vga_in8(0x3c5, par) & ~0x21;
1431 
1432 	vga_out8(0x3c5, tmp | 0x03, par);
1433 	vga_out8(0x3c5, tmp | 0x23, par);
1434 	vga_out8(0x3c5, tmp | 0x03, par);
1435 	vga_out8(0x3c5, reg->SR15, par);
1436 	udelay(100);
1437 
1438 	vga_out8(0x3c4, 0x30, par);
1439 	vga_out8(0x3c5, reg->SR30, par);
1440 	vga_out8(0x3c4, 0x08, par);
1441 	vga_out8(0x3c5, reg->SR08, par);
1442 
1443 	/* now write out cr67 in full, possibly starting STREAMS */
1444 	VerticalRetraceWait(par);
1445 	vga_out8(0x3d4, 0x67, par);
1446 	vga_out8(0x3d5, reg->CR67, par);
1447 
1448 	vga_out8(0x3d4, 0x66, par);
1449 	cr66 = vga_in8(0x3d5, par);
1450 	vga_out8(0x3d5, cr66 | 0x80, par);
1451 	vga_out8(0x3d4, 0x3a, par);
1452 	cr3a = vga_in8(0x3d5, par);
1453 	vga_out8(0x3d5, cr3a | 0x80, par);
1454 
1455 	if (par->chip != S3_SAVAGE_MX) {
1456 		VerticalRetraceWait(par);
1457 		savage_out32(FIFO_CONTROL_REG, reg->MMPR0, par);
1458 		par->SavageWaitIdle(par);
1459 		savage_out32(MIU_CONTROL_REG, reg->MMPR1, par);
1460 		par->SavageWaitIdle(par);
1461 		savage_out32(STREAMS_TIMEOUT_REG, reg->MMPR2, par);
1462 		par->SavageWaitIdle(par);
1463 		savage_out32(MISC_TIMEOUT_REG, reg->MMPR3, par);
1464 	}
1465 
1466 	vga_out8(0x3d4, 0x66, par);
1467 	vga_out8(0x3d5, cr66, par);
1468 	vga_out8(0x3d4, 0x3a, par);
1469 	vga_out8(0x3d5, cr3a, par);
1470 
1471 	SavageSetup2DEngine(par);
1472 	vgaHWProtect(par, 0);
1473 }
1474 
1475 static void savagefb_update_start(struct savagefb_par *par, int base)
1476 {
1477 	/* program the start address registers */
1478 	vga_out16(0x3d4, (base & 0x00ff00) | 0x0c, par);
1479 	vga_out16(0x3d4, ((base & 0x00ff) << 8) | 0x0d, par);
1480 	vga_out8(0x3d4, 0x69, par);
1481 	vga_out8(0x3d5, (base & 0x7f0000) >> 16, par);
1482 }
1483 
1484 
1485 static void savagefb_set_fix(struct fb_info *info)
1486 {
1487 	info->fix.line_length = info->var.xres_virtual *
1488 		info->var.bits_per_pixel / 8;
1489 
1490 	if (info->var.bits_per_pixel == 8) {
1491 		info->fix.visual      = FB_VISUAL_PSEUDOCOLOR;
1492 		info->fix.xpanstep    = 4;
1493 	} else {
1494 		info->fix.visual      = FB_VISUAL_TRUECOLOR;
1495 		info->fix.xpanstep    = 2;
1496 	}
1497 
1498 }
1499 
1500 static int savagefb_set_par(struct fb_info *info)
1501 {
1502 	struct savagefb_par *par = info->par;
1503 	struct fb_var_screeninfo *var = &info->var;
1504 	int err;
1505 
1506 	DBG("savagefb_set_par");
1507 	err = savagefb_decode_var(var, par, &par->state);
1508 	if (err)
1509 		return err;
1510 
1511 	if (par->dacSpeedBpp <= 0) {
1512 		if (var->bits_per_pixel > 24)
1513 			par->dacSpeedBpp = par->clock[3];
1514 		else if (var->bits_per_pixel >= 24)
1515 			par->dacSpeedBpp = par->clock[2];
1516 		else if ((var->bits_per_pixel > 8) && (var->bits_per_pixel < 24))
1517 			par->dacSpeedBpp = par->clock[1];
1518 		else if (var->bits_per_pixel <= 8)
1519 			par->dacSpeedBpp = par->clock[0];
1520 	}
1521 
1522 	/* Set ramdac limits */
1523 	par->maxClock = par->dacSpeedBpp;
1524 	par->minClock = 10000;
1525 
1526 	savagefb_set_par_int(par, &par->state);
1527 	fb_set_cmap(&info->cmap, info);
1528 	savagefb_set_fix(info);
1529 	savagefb_set_clip(info);
1530 
1531 	SavagePrintRegs(par);
1532 	return 0;
1533 }
1534 
1535 /*
1536  *    Pan or Wrap the Display
1537  */
1538 static int savagefb_pan_display(struct fb_var_screeninfo *var,
1539 				struct fb_info           *info)
1540 {
1541 	struct savagefb_par *par = info->par;
1542 	int base;
1543 
1544 	base = (var->yoffset * info->fix.line_length
1545 	     + (var->xoffset & ~1) * ((info->var.bits_per_pixel+7) / 8)) >> 2;
1546 
1547 	savagefb_update_start(par, base);
1548 	return 0;
1549 }
1550 
1551 static int savagefb_blank(int blank, struct fb_info *info)
1552 {
1553 	struct savagefb_par *par = info->par;
1554 	u8 sr8 = 0, srd = 0;
1555 
1556 	if (par->display_type == DISP_CRT) {
1557 		vga_out8(0x3c4, 0x08, par);
1558 		sr8 = vga_in8(0x3c5, par);
1559 		sr8 |= 0x06;
1560 		vga_out8(0x3c5, sr8, par);
1561 		vga_out8(0x3c4, 0x0d, par);
1562 		srd = vga_in8(0x3c5, par);
1563 		srd &= 0x50;
1564 
1565 		switch (blank) {
1566 		case FB_BLANK_UNBLANK:
1567 		case FB_BLANK_NORMAL:
1568 			break;
1569 		case FB_BLANK_VSYNC_SUSPEND:
1570 			srd |= 0x10;
1571 			break;
1572 		case FB_BLANK_HSYNC_SUSPEND:
1573 			srd |= 0x40;
1574 			break;
1575 		case FB_BLANK_POWERDOWN:
1576 			srd |= 0x50;
1577 			break;
1578 		}
1579 
1580 		vga_out8(0x3c4, 0x0d, par);
1581 		vga_out8(0x3c5, srd, par);
1582 	}
1583 
1584 	if (par->display_type == DISP_LCD ||
1585 	    par->display_type == DISP_DFP) {
1586 		switch(blank) {
1587 		case FB_BLANK_UNBLANK:
1588 		case FB_BLANK_NORMAL:
1589 			vga_out8(0x3c4, 0x31, par); /* SR31 bit 4 - FP enable */
1590 			vga_out8(0x3c5, vga_in8(0x3c5, par) | 0x10, par);
1591 			break;
1592 		case FB_BLANK_VSYNC_SUSPEND:
1593 		case FB_BLANK_HSYNC_SUSPEND:
1594 		case FB_BLANK_POWERDOWN:
1595 			vga_out8(0x3c4, 0x31, par); /* SR31 bit 4 - FP enable */
1596 			vga_out8(0x3c5, vga_in8(0x3c5, par) & ~0x10, par);
1597 			break;
1598 		}
1599 	}
1600 
1601 	return (blank == FB_BLANK_NORMAL) ? 1 : 0;
1602 }
1603 
1604 static int savagefb_open(struct fb_info *info, int user)
1605 {
1606 	struct savagefb_par *par = info->par;
1607 
1608 	mutex_lock(&par->open_lock);
1609 
1610 	if (!par->open_count) {
1611 		memset(&par->vgastate, 0, sizeof(par->vgastate));
1612 		par->vgastate.flags = VGA_SAVE_CMAP | VGA_SAVE_FONTS |
1613 			VGA_SAVE_MODE;
1614 		par->vgastate.vgabase = par->mmio.vbase + 0x8000;
1615 		save_vga(&par->vgastate);
1616 		savage_get_default_par(par, &par->initial);
1617 	}
1618 
1619 	par->open_count++;
1620 	mutex_unlock(&par->open_lock);
1621 	return 0;
1622 }
1623 
1624 static int savagefb_release(struct fb_info *info, int user)
1625 {
1626 	struct savagefb_par *par = info->par;
1627 
1628 	mutex_lock(&par->open_lock);
1629 
1630 	if (par->open_count == 1) {
1631 		savage_set_default_par(par, &par->initial);
1632 		restore_vga(&par->vgastate);
1633 	}
1634 
1635 	par->open_count--;
1636 	mutex_unlock(&par->open_lock);
1637 	return 0;
1638 }
1639 
1640 static const struct fb_ops savagefb_ops = {
1641 	.owner          = THIS_MODULE,
1642 	.fb_open        = savagefb_open,
1643 	.fb_release     = savagefb_release,
1644 	.fb_check_var   = savagefb_check_var,
1645 	.fb_set_par     = savagefb_set_par,
1646 	.fb_setcolreg   = savagefb_setcolreg,
1647 	.fb_pan_display = savagefb_pan_display,
1648 	.fb_blank       = savagefb_blank,
1649 #if defined(CONFIG_FB_SAVAGE_ACCEL)
1650 	.fb_fillrect    = savagefb_fillrect,
1651 	.fb_copyarea    = savagefb_copyarea,
1652 	.fb_imageblit   = savagefb_imageblit,
1653 	.fb_sync        = savagefb_sync,
1654 #else
1655 	.fb_fillrect    = cfb_fillrect,
1656 	.fb_copyarea    = cfb_copyarea,
1657 	.fb_imageblit   = cfb_imageblit,
1658 #endif
1659 };
1660 
1661 /* --------------------------------------------------------------------- */
1662 
1663 static const struct fb_var_screeninfo savagefb_var800x600x8 = {
1664 	.accel_flags =	FB_ACCELF_TEXT,
1665 	.xres =		800,
1666 	.yres =		600,
1667 	.xres_virtual =  800,
1668 	.yres_virtual =  600,
1669 	.bits_per_pixel = 8,
1670 	.pixclock =	25000,
1671 	.left_margin =	88,
1672 	.right_margin =	40,
1673 	.upper_margin =	23,
1674 	.lower_margin =	1,
1675 	.hsync_len =	128,
1676 	.vsync_len =	4,
1677 	.sync =		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
1678 	.vmode =	FB_VMODE_NONINTERLACED
1679 };
1680 
1681 static void savage_enable_mmio(struct savagefb_par *par)
1682 {
1683 	unsigned char val;
1684 
1685 	DBG("savage_enable_mmio\n");
1686 
1687 	val = vga_in8(0x3c3, par);
1688 	vga_out8(0x3c3, val | 0x01, par);
1689 	val = vga_in8(0x3cc, par);
1690 	vga_out8(0x3c2, val | 0x01, par);
1691 
1692 	if (par->chip >= S3_SAVAGE4) {
1693 		vga_out8(0x3d4, 0x40, par);
1694 		val = vga_in8(0x3d5, par);
1695 		vga_out8(0x3d5, val | 1, par);
1696 	}
1697 }
1698 
1699 
1700 static void savage_disable_mmio(struct savagefb_par *par)
1701 {
1702 	unsigned char val;
1703 
1704 	DBG("savage_disable_mmio\n");
1705 
1706 	if (par->chip >= S3_SAVAGE4) {
1707 		vga_out8(0x3d4, 0x40, par);
1708 		val = vga_in8(0x3d5, par);
1709 		vga_out8(0x3d5, val | 1, par);
1710 	}
1711 }
1712 
1713 
1714 static int savage_map_mmio(struct fb_info *info)
1715 {
1716 	struct savagefb_par *par = info->par;
1717 	DBG("savage_map_mmio");
1718 
1719 	if (S3_SAVAGE3D_SERIES(par->chip))
1720 		par->mmio.pbase = pci_resource_start(par->pcidev, 0) +
1721 			SAVAGE_NEWMMIO_REGBASE_S3;
1722 	else
1723 		par->mmio.pbase = pci_resource_start(par->pcidev, 0) +
1724 			SAVAGE_NEWMMIO_REGBASE_S4;
1725 
1726 	par->mmio.len = SAVAGE_NEWMMIO_REGSIZE;
1727 
1728 	par->mmio.vbase = ioremap(par->mmio.pbase, par->mmio.len);
1729 	if (!par->mmio.vbase) {
1730 		printk("savagefb: unable to map memory mapped IO\n");
1731 		return -ENOMEM;
1732 	} else
1733 		printk(KERN_INFO "savagefb: mapped io at %p\n",
1734 			par->mmio.vbase);
1735 
1736 	info->fix.mmio_start = par->mmio.pbase;
1737 	info->fix.mmio_len   = par->mmio.len;
1738 
1739 	par->bci_base = (u32 __iomem *)(par->mmio.vbase + BCI_BUFFER_OFFSET);
1740 	par->bci_ptr  = 0;
1741 
1742 	savage_enable_mmio(par);
1743 
1744 	return 0;
1745 }
1746 
1747 static void savage_unmap_mmio(struct fb_info *info)
1748 {
1749 	struct savagefb_par *par = info->par;
1750 	DBG("savage_unmap_mmio");
1751 
1752 	savage_disable_mmio(par);
1753 
1754 	if (par->mmio.vbase) {
1755 		iounmap(par->mmio.vbase);
1756 		par->mmio.vbase = NULL;
1757 	}
1758 }
1759 
1760 static int savage_map_video(struct fb_info *info, int video_len)
1761 {
1762 	struct savagefb_par *par = info->par;
1763 	int resource;
1764 
1765 	DBG("savage_map_video");
1766 
1767 	if (S3_SAVAGE3D_SERIES(par->chip))
1768 		resource = 0;
1769 	else
1770 		resource = 1;
1771 
1772 	par->video.pbase = pci_resource_start(par->pcidev, resource);
1773 	par->video.len   = video_len;
1774 	par->video.vbase = ioremap_wc(par->video.pbase, par->video.len);
1775 
1776 	if (!par->video.vbase) {
1777 		printk("savagefb: unable to map screen memory\n");
1778 		return -ENOMEM;
1779 	} else
1780 		printk(KERN_INFO "savagefb: mapped framebuffer at %p, "
1781 		       "pbase == %x\n", par->video.vbase, par->video.pbase);
1782 
1783 	info->fix.smem_start = par->video.pbase;
1784 	info->fix.smem_len   = par->video.len - par->cob_size;
1785 	info->screen_base    = par->video.vbase;
1786 	par->video.wc_cookie = arch_phys_wc_add(par->video.pbase, video_len);
1787 
1788 	/* Clear framebuffer, it's all white in memory after boot */
1789 	memset_io(par->video.vbase, 0, par->video.len);
1790 
1791 	return 0;
1792 }
1793 
1794 static void savage_unmap_video(struct fb_info *info)
1795 {
1796 	struct savagefb_par *par = info->par;
1797 
1798 	DBG("savage_unmap_video");
1799 
1800 	if (par->video.vbase) {
1801 		arch_phys_wc_del(par->video.wc_cookie);
1802 		iounmap(par->video.vbase);
1803 		par->video.vbase = NULL;
1804 		info->screen_base = NULL;
1805 	}
1806 }
1807 
1808 static int savage_init_hw(struct savagefb_par *par)
1809 {
1810 	unsigned char config1, m, n, n1, n2, sr8, cr3f, cr66 = 0, tmp;
1811 
1812 	static unsigned char RamSavage3D[] = { 8, 4, 4, 2 };
1813 	static unsigned char RamSavage4[] =  { 2, 4, 8, 12, 16, 32, 64, 32 };
1814 	static unsigned char RamSavageMX[] = { 2, 8, 4, 16, 8, 16, 4, 16 };
1815 	static unsigned char RamSavageNB[] = { 0, 2, 4, 8, 16, 32, 2, 2 };
1816 	int videoRam, videoRambytes, dvi;
1817 
1818 	DBG("savage_init_hw");
1819 
1820 	/* unprotect CRTC[0-7] */
1821 	vga_out8(0x3d4, 0x11, par);
1822 	tmp = vga_in8(0x3d5, par);
1823 	vga_out8(0x3d5, tmp & 0x7f, par);
1824 
1825 	/* unlock extended regs */
1826 	vga_out16(0x3d4, 0x4838, par);
1827 	vga_out16(0x3d4, 0xa039, par);
1828 	vga_out16(0x3c4, 0x0608, par);
1829 
1830 	vga_out8(0x3d4, 0x40, par);
1831 	tmp = vga_in8(0x3d5, par);
1832 	vga_out8(0x3d5, tmp & ~0x01, par);
1833 
1834 	/* unlock sys regs */
1835 	vga_out8(0x3d4, 0x38, par);
1836 	vga_out8(0x3d5, 0x48, par);
1837 
1838 	/* Unlock system registers. */
1839 	vga_out16(0x3d4, 0x4838, par);
1840 
1841 	/* Next go on to detect amount of installed ram */
1842 
1843 	vga_out8(0x3d4, 0x36, par);            /* for register CR36 (CONFG_REG1), */
1844 	config1 = vga_in8(0x3d5, par);    /* get amount of vram installed */
1845 
1846 	/* Compute the amount of video memory and offscreen memory. */
1847 
1848 	switch  (par->chip) {
1849 	case S3_SAVAGE3D:
1850 		videoRam = RamSavage3D[(config1 & 0xC0) >> 6 ] * 1024;
1851 		break;
1852 
1853 	case S3_SAVAGE4:
1854 		/*
1855 		 * The Savage4 has one ugly special case to consider.  On
1856 		 * systems with 4 banks of 2Mx32 SDRAM, the BIOS says 4MB
1857 		 * when it really means 8MB.  Why do it the same when you
1858 		 * can do it different...
1859 		 */
1860 		vga_out8(0x3d4, 0x68, par);	/* memory control 1 */
1861 		if ((vga_in8(0x3d5, par) & 0xC0) == (0x01 << 6))
1862 			RamSavage4[1] = 8;
1863 		fallthrough;
1864 
1865 	case S3_SAVAGE2000:
1866 		videoRam = RamSavage4[(config1 & 0xE0) >> 5] * 1024;
1867 		break;
1868 
1869 	case S3_SAVAGE_MX:
1870 	case S3_SUPERSAVAGE:
1871 		videoRam = RamSavageMX[(config1 & 0x0E) >> 1] * 1024;
1872 		break;
1873 
1874 	case S3_PROSAVAGE:
1875 	case S3_PROSAVAGEDDR:
1876 	case S3_TWISTER:
1877 		videoRam = RamSavageNB[(config1 & 0xE0) >> 5] * 1024;
1878 		break;
1879 
1880 	default:
1881 		/* How did we get here? */
1882 		videoRam = 0;
1883 		break;
1884 	}
1885 
1886 	videoRambytes = videoRam * 1024;
1887 
1888 	printk(KERN_INFO "savagefb: probed videoram:  %dk\n", videoRam);
1889 
1890 	/* reset graphics engine to avoid memory corruption */
1891 	vga_out8(0x3d4, 0x66, par);
1892 	cr66 = vga_in8(0x3d5, par);
1893 	vga_out8(0x3d5, cr66 | 0x02, par);
1894 	usleep_range(10000, 11000);
1895 
1896 	vga_out8(0x3d4, 0x66, par);
1897 	vga_out8(0x3d5, cr66 & ~0x02, par);	/* clear reset flag */
1898 	usleep_range(10000, 11000);
1899 
1900 
1901 	/*
1902 	 * reset memory interface, 3D engine, AGP master, PCI master,
1903 	 * master engine unit, motion compensation/LPB
1904 	 */
1905 	vga_out8(0x3d4, 0x3f, par);
1906 	cr3f = vga_in8(0x3d5, par);
1907 	vga_out8(0x3d5, cr3f | 0x08, par);
1908 	usleep_range(10000, 11000);
1909 
1910 	vga_out8(0x3d4, 0x3f, par);
1911 	vga_out8(0x3d5, cr3f & ~0x08, par);	/* clear reset flags */
1912 	usleep_range(10000, 11000);
1913 
1914 	/* Savage ramdac speeds */
1915 	par->numClocks = 4;
1916 	par->clock[0] = 250000;
1917 	par->clock[1] = 250000;
1918 	par->clock[2] = 220000;
1919 	par->clock[3] = 220000;
1920 
1921 	/* detect current mclk */
1922 	vga_out8(0x3c4, 0x08, par);
1923 	sr8 = vga_in8(0x3c5, par);
1924 	vga_out8(0x3c5, 0x06, par);
1925 	vga_out8(0x3c4, 0x10, par);
1926 	n = vga_in8(0x3c5, par);
1927 	vga_out8(0x3c4, 0x11, par);
1928 	m = vga_in8(0x3c5, par);
1929 	vga_out8(0x3c4, 0x08, par);
1930 	vga_out8(0x3c5, sr8, par);
1931 	m &= 0x7f;
1932 	n1 = n & 0x1f;
1933 	n2 = (n >> 5) & 0x03;
1934 	par->MCLK = ((1431818 * (m+2)) / (n1+2) / (1 << n2) + 50) / 100;
1935 	printk(KERN_INFO "savagefb: Detected current MCLK value of %d kHz\n",
1936 		par->MCLK);
1937 
1938 	/* check for DVI/flat panel */
1939 	dvi = 0;
1940 
1941 	if (par->chip == S3_SAVAGE4) {
1942 		unsigned char sr30 = 0x00;
1943 
1944 		vga_out8(0x3c4, 0x30, par);
1945 		/* clear bit 1 */
1946 		vga_out8(0x3c5, vga_in8(0x3c5, par) & ~0x02, par);
1947 		sr30 = vga_in8(0x3c5, par);
1948 		if (sr30 & 0x02 /*0x04 */) {
1949 			dvi = 1;
1950 			printk("savagefb: Digital Flat Panel Detected\n");
1951 		}
1952 	}
1953 
1954 	if ((S3_SAVAGE_MOBILE_SERIES(par->chip) ||
1955 	     S3_MOBILE_TWISTER_SERIES(par->chip)) && !par->crtonly)
1956 		par->display_type = DISP_LCD;
1957 	else if (dvi || (par->chip == S3_SAVAGE4 && par->dvi))
1958 		par->display_type = DISP_DFP;
1959 	else
1960 		par->display_type = DISP_CRT;
1961 
1962 	/* Check LCD panel parrmation */
1963 
1964 	if (par->display_type == DISP_LCD) {
1965 		unsigned char cr6b = VGArCR(0x6b, par);
1966 
1967 		int panelX = (VGArSEQ(0x61, par) +
1968 			      ((VGArSEQ(0x66, par) & 0x02) << 7) + 1) * 8;
1969 		int panelY = (VGArSEQ(0x69, par) +
1970 			      ((VGArSEQ(0x6e, par) & 0x70) << 4) + 1);
1971 
1972 		char * sTechnology = "Unknown";
1973 
1974 		/* OK, I admit it.  I don't know how to limit the max dot clock
1975 		 * for LCD panels of various sizes.  I thought I copied the
1976 		 * formula from the BIOS, but many users have parrmed me of
1977 		 * my folly.
1978 		 *
1979 		 * Instead, I'll abandon any attempt to automatically limit the
1980 		 * clock, and add an LCDClock option to XF86Config.  Some day,
1981 		 * I should come back to this.
1982 		 */
1983 
1984 		enum ACTIVE_DISPLAYS { /* These are the bits in CR6B */
1985 			ActiveCRT = 0x01,
1986 			ActiveLCD = 0x02,
1987 			ActiveTV = 0x04,
1988 			ActiveCRT2 = 0x20,
1989 			ActiveDUO = 0x80
1990 		};
1991 
1992 		if ((VGArSEQ(0x39, par) & 0x03) == 0) {
1993 			sTechnology = "TFT";
1994 		} else if ((VGArSEQ(0x30, par) & 0x01) == 0) {
1995 			sTechnology = "DSTN";
1996 		} else 	{
1997 			sTechnology = "STN";
1998 		}
1999 
2000 		printk(KERN_INFO "savagefb: %dx%d %s LCD panel detected %s\n",
2001 		       panelX, panelY, sTechnology,
2002 		       cr6b & ActiveLCD ? "and active" : "but not active");
2003 
2004 		if (cr6b & ActiveLCD) 	{
2005 			/*
2006 			 * If the LCD is active and panel expansion is enabled,
2007 			 * we probably want to kill the HW cursor.
2008 			 */
2009 
2010 			printk(KERN_INFO "savagefb: Limiting video mode to "
2011 				"%dx%d\n", panelX, panelY);
2012 
2013 			par->SavagePanelWidth = panelX;
2014 			par->SavagePanelHeight = panelY;
2015 
2016 		} else
2017 			par->display_type = DISP_CRT;
2018 	}
2019 
2020 	savage_get_default_par(par, &par->state);
2021 	par->save = par->state;
2022 
2023 	if (S3_SAVAGE4_SERIES(par->chip)) {
2024 		/*
2025 		 * The Savage4 and ProSavage have COB coherency bugs which
2026 		 * render the buffer useless.  We disable it.
2027 		 */
2028 		par->cob_index = 2;
2029 		par->cob_size = 0x8000 << par->cob_index;
2030 		par->cob_offset = videoRambytes;
2031 	} else {
2032 		/* We use 128kB for the COB on all chips. */
2033 
2034 		par->cob_index  = 7;
2035 		par->cob_size   = 0x400 << par->cob_index;
2036 		par->cob_offset = videoRambytes - par->cob_size;
2037 	}
2038 
2039 	return videoRambytes;
2040 }
2041 
2042 static int savage_init_fb_info(struct fb_info *info, struct pci_dev *dev,
2043 			       const struct pci_device_id *id)
2044 {
2045 	struct savagefb_par *par = info->par;
2046 	int err = 0;
2047 
2048 	par->pcidev  = dev;
2049 
2050 	info->fix.type	   = FB_TYPE_PACKED_PIXELS;
2051 	info->fix.type_aux	   = 0;
2052 	info->fix.ypanstep	   = 1;
2053 	info->fix.ywrapstep   = 0;
2054 	info->fix.accel       = id->driver_data;
2055 
2056 	switch (info->fix.accel) {
2057 	case FB_ACCEL_SUPERSAVAGE:
2058 		par->chip = S3_SUPERSAVAGE;
2059 		snprintf(info->fix.id, 16, "SuperSavage");
2060 		break;
2061 	case FB_ACCEL_SAVAGE4:
2062 		par->chip = S3_SAVAGE4;
2063 		snprintf(info->fix.id, 16, "Savage4");
2064 		break;
2065 	case FB_ACCEL_SAVAGE3D:
2066 		par->chip = S3_SAVAGE3D;
2067 		snprintf(info->fix.id, 16, "Savage3D");
2068 		break;
2069 	case FB_ACCEL_SAVAGE3D_MV:
2070 		par->chip = S3_SAVAGE3D;
2071 		snprintf(info->fix.id, 16, "Savage3D-MV");
2072 		break;
2073 	case FB_ACCEL_SAVAGE2000:
2074 		par->chip = S3_SAVAGE2000;
2075 		snprintf(info->fix.id, 16, "Savage2000");
2076 		break;
2077 	case FB_ACCEL_SAVAGE_MX_MV:
2078 		par->chip = S3_SAVAGE_MX;
2079 		snprintf(info->fix.id, 16, "Savage/MX-MV");
2080 		break;
2081 	case FB_ACCEL_SAVAGE_MX:
2082 		par->chip = S3_SAVAGE_MX;
2083 		snprintf(info->fix.id, 16, "Savage/MX");
2084 		break;
2085 	case FB_ACCEL_SAVAGE_IX_MV:
2086 		par->chip = S3_SAVAGE_MX;
2087 		snprintf(info->fix.id, 16, "Savage/IX-MV");
2088 		break;
2089 	case FB_ACCEL_SAVAGE_IX:
2090 		par->chip = S3_SAVAGE_MX;
2091 		snprintf(info->fix.id, 16, "Savage/IX");
2092 		break;
2093 	case FB_ACCEL_PROSAVAGE_PM:
2094 		par->chip = S3_PROSAVAGE;
2095 		snprintf(info->fix.id, 16, "ProSavagePM");
2096 		break;
2097 	case FB_ACCEL_PROSAVAGE_KM:
2098 		par->chip = S3_PROSAVAGE;
2099 		snprintf(info->fix.id, 16, "ProSavageKM");
2100 		break;
2101 	case FB_ACCEL_S3TWISTER_P:
2102 		par->chip = S3_TWISTER;
2103 		snprintf(info->fix.id, 16, "TwisterP");
2104 		break;
2105 	case FB_ACCEL_S3TWISTER_K:
2106 		par->chip = S3_TWISTER;
2107 		snprintf(info->fix.id, 16, "TwisterK");
2108 		break;
2109 	case FB_ACCEL_PROSAVAGE_DDR:
2110 		par->chip = S3_PROSAVAGEDDR;
2111 		snprintf(info->fix.id, 16, "ProSavageDDR");
2112 		break;
2113 	case FB_ACCEL_PROSAVAGE_DDRK:
2114 		par->chip = S3_PROSAVAGEDDR;
2115 		snprintf(info->fix.id, 16, "ProSavage8");
2116 		break;
2117 	}
2118 
2119 	if (S3_SAVAGE3D_SERIES(par->chip)) {
2120 		par->SavageWaitIdle = savage3D_waitidle;
2121 		par->SavageWaitFifo = savage3D_waitfifo;
2122 	} else if (S3_SAVAGE4_SERIES(par->chip) ||
2123 		   S3_SUPERSAVAGE == par->chip) {
2124 		par->SavageWaitIdle = savage4_waitidle;
2125 		par->SavageWaitFifo = savage4_waitfifo;
2126 	} else {
2127 		par->SavageWaitIdle = savage2000_waitidle;
2128 		par->SavageWaitFifo = savage2000_waitfifo;
2129 	}
2130 
2131 	info->var.nonstd      = 0;
2132 	info->var.activate    = FB_ACTIVATE_NOW;
2133 	info->var.width       = -1;
2134 	info->var.height      = -1;
2135 	info->var.accel_flags = 0;
2136 
2137 	info->fbops          = &savagefb_ops;
2138 	info->flags          = FBINFO_DEFAULT |
2139 		               FBINFO_HWACCEL_YPAN |
2140 		               FBINFO_HWACCEL_XPAN;
2141 
2142 	info->pseudo_palette = par->pseudo_palette;
2143 
2144 #if defined(CONFIG_FB_SAVAGE_ACCEL)
2145 	/* FIFO size + padding for commands */
2146 	info->pixmap.addr = kcalloc(8, 1024, GFP_KERNEL);
2147 
2148 	err = -ENOMEM;
2149 	if (info->pixmap.addr) {
2150 		info->pixmap.size = 8*1024;
2151 		info->pixmap.scan_align = 4;
2152 		info->pixmap.buf_align = 4;
2153 		info->pixmap.access_align = 32;
2154 
2155 		err = fb_alloc_cmap(&info->cmap, NR_PALETTE, 0);
2156 		if (!err)
2157 			info->flags |= FBINFO_HWACCEL_COPYAREA |
2158 				       FBINFO_HWACCEL_FILLRECT |
2159 				       FBINFO_HWACCEL_IMAGEBLIT;
2160 		else
2161 			kfree(info->pixmap.addr);
2162 	}
2163 #endif
2164 	return err;
2165 }
2166 
2167 /* --------------------------------------------------------------------- */
2168 
2169 static int savagefb_probe(struct pci_dev *dev, const struct pci_device_id *id)
2170 {
2171 	struct fb_info *info;
2172 	struct savagefb_par *par;
2173 	u_int h_sync, v_sync;
2174 	unsigned char __maybe_unused *edid;
2175 	int err, lpitch;
2176 	int video_len;
2177 
2178 	DBG("savagefb_probe");
2179 
2180 	err = aperture_remove_conflicting_pci_devices(dev, "savagefb");
2181 	if (err)
2182 		return err;
2183 
2184 	info = framebuffer_alloc(sizeof(struct savagefb_par), &dev->dev);
2185 	if (!info)
2186 		return -ENOMEM;
2187 	par = info->par;
2188 	mutex_init(&par->open_lock);
2189 	err = pci_enable_device(dev);
2190 	if (err)
2191 		goto failed_enable;
2192 
2193 	if ((err = pci_request_regions(dev, "savagefb"))) {
2194 		printk(KERN_ERR "cannot request PCI regions\n");
2195 		goto failed_enable;
2196 	}
2197 
2198 	err = -ENOMEM;
2199 
2200 	if ((err = savage_init_fb_info(info, dev, id)))
2201 		goto failed_init;
2202 
2203 	err = savage_map_mmio(info);
2204 	if (err)
2205 		goto failed_mmio;
2206 
2207 	video_len = savage_init_hw(par);
2208 	/* FIXME: can't be negative */
2209 	if (video_len < 0) {
2210 		err = video_len;
2211 		goto failed_mmio;
2212 	}
2213 
2214 	err = savage_map_video(info, video_len);
2215 	if (err)
2216 		goto failed_video;
2217 
2218 	INIT_LIST_HEAD(&info->modelist);
2219 #if defined(CONFIG_FB_SAVAGE_I2C)
2220 	savagefb_create_i2c_busses(info);
2221 	savagefb_probe_i2c_connector(info, &edid);
2222 	fb_edid_to_monspecs(edid, &info->monspecs);
2223 	kfree(edid);
2224 	fb_videomode_to_modelist(info->monspecs.modedb,
2225 				 info->monspecs.modedb_len,
2226 				 &info->modelist);
2227 #endif
2228 	info->var = savagefb_var800x600x8;
2229 	/* if a panel was detected, default to a CVT mode instead */
2230 	if (par->SavagePanelWidth) {
2231 		struct fb_videomode cvt_mode;
2232 
2233 		memset(&cvt_mode, 0, sizeof(cvt_mode));
2234 		cvt_mode.xres = par->SavagePanelWidth;
2235 		cvt_mode.yres = par->SavagePanelHeight;
2236 		cvt_mode.refresh = 60;
2237 		/* FIXME: if we know there is only the panel
2238 		 * we can enable reduced blanking as well */
2239 		if (fb_find_mode_cvt(&cvt_mode, 0, 0))
2240 			printk(KERN_WARNING "No CVT mode found for panel\n");
2241 		else if (fb_find_mode(&info->var, info, NULL, NULL, 0,
2242 				      &cvt_mode, 0) != 3)
2243 			info->var = savagefb_var800x600x8;
2244 	}
2245 
2246 	if (mode_option) {
2247 		fb_find_mode(&info->var, info, mode_option,
2248 			     info->monspecs.modedb, info->monspecs.modedb_len,
2249 			     NULL, 8);
2250 	} else if (info->monspecs.modedb != NULL) {
2251 		const struct fb_videomode *mode;
2252 
2253 		mode = fb_find_best_display(&info->monspecs, &info->modelist);
2254 		savage_update_var(&info->var, mode);
2255 	}
2256 
2257 	/* maximize virtual vertical length */
2258 	lpitch = info->var.xres_virtual*((info->var.bits_per_pixel + 7) >> 3);
2259 	info->var.yres_virtual = info->fix.smem_len/lpitch;
2260 
2261 	if (info->var.yres_virtual < info->var.yres) {
2262 		err = -ENOMEM;
2263 		goto failed;
2264 	}
2265 
2266 #if defined(CONFIG_FB_SAVAGE_ACCEL)
2267 	/*
2268 	 * The clipping coordinates are masked with 0xFFF, so limit our
2269 	 * virtual resolutions to these sizes.
2270 	 */
2271 	if (info->var.yres_virtual > 0x1000)
2272 		info->var.yres_virtual = 0x1000;
2273 
2274 	if (info->var.xres_virtual > 0x1000)
2275 		info->var.xres_virtual = 0x1000;
2276 #endif
2277 	savagefb_check_var(&info->var, info);
2278 	savagefb_set_fix(info);
2279 
2280 	/*
2281 	 * Calculate the hsync and vsync frequencies.  Note that
2282 	 * we split the 1e12 constant up so that we can preserve
2283 	 * the precision and fit the results into 32-bit registers.
2284 	 *  (1953125000 * 512 = 1e12)
2285 	 */
2286 	h_sync = 1953125000 / info->var.pixclock;
2287 	h_sync = h_sync * 512 / (info->var.xres + info->var.left_margin +
2288 				 info->var.right_margin +
2289 				 info->var.hsync_len);
2290 	v_sync = h_sync / (info->var.yres + info->var.upper_margin +
2291 			   info->var.lower_margin + info->var.vsync_len);
2292 
2293 	printk(KERN_INFO "savagefb v" SAVAGEFB_VERSION ": "
2294 	       "%dkB VRAM, using %dx%d, %d.%03dkHz, %dHz\n",
2295 	       info->fix.smem_len >> 10,
2296 	       info->var.xres, info->var.yres,
2297 	       h_sync / 1000, h_sync % 1000, v_sync);
2298 
2299 
2300 	fb_destroy_modedb(info->monspecs.modedb);
2301 	info->monspecs.modedb = NULL;
2302 
2303 	err = register_framebuffer(info);
2304 	if (err < 0)
2305 		goto failed;
2306 
2307 	printk(KERN_INFO "fb: S3 %s frame buffer device\n",
2308 	       info->fix.id);
2309 
2310 	/*
2311 	 * Our driver data
2312 	 */
2313 	pci_set_drvdata(dev, info);
2314 
2315 	return 0;
2316 
2317  failed:
2318 #ifdef CONFIG_FB_SAVAGE_I2C
2319 	savagefb_delete_i2c_busses(info);
2320 #endif
2321 	fb_alloc_cmap(&info->cmap, 0, 0);
2322 	savage_unmap_video(info);
2323  failed_video:
2324 	savage_unmap_mmio(info);
2325  failed_mmio:
2326 	kfree(info->pixmap.addr);
2327  failed_init:
2328 	pci_release_regions(dev);
2329  failed_enable:
2330 	framebuffer_release(info);
2331 
2332 	return err;
2333 }
2334 
2335 static void savagefb_remove(struct pci_dev *dev)
2336 {
2337 	struct fb_info *info = pci_get_drvdata(dev);
2338 
2339 	DBG("savagefb_remove");
2340 
2341 	if (info) {
2342 		unregister_framebuffer(info);
2343 
2344 #ifdef CONFIG_FB_SAVAGE_I2C
2345 		savagefb_delete_i2c_busses(info);
2346 #endif
2347 		fb_alloc_cmap(&info->cmap, 0, 0);
2348 		savage_unmap_video(info);
2349 		savage_unmap_mmio(info);
2350 		kfree(info->pixmap.addr);
2351 		pci_release_regions(dev);
2352 		framebuffer_release(info);
2353 	}
2354 }
2355 
2356 static int savagefb_suspend_late(struct device *dev, pm_message_t mesg)
2357 {
2358 	struct fb_info *info = dev_get_drvdata(dev);
2359 	struct savagefb_par *par = info->par;
2360 
2361 	DBG("savagefb_suspend");
2362 
2363 	if (mesg.event == PM_EVENT_PRETHAW)
2364 		mesg.event = PM_EVENT_FREEZE;
2365 	par->pm_state = mesg.event;
2366 	dev->power.power_state = mesg;
2367 
2368 	/*
2369 	 * For PM_EVENT_FREEZE, do not power down so the console
2370 	 * can remain active.
2371 	 */
2372 	if (mesg.event == PM_EVENT_FREEZE)
2373 		return 0;
2374 
2375 	console_lock();
2376 	fb_set_suspend(info, 1);
2377 
2378 	if (info->fbops->fb_sync)
2379 		info->fbops->fb_sync(info);
2380 
2381 	savagefb_blank(FB_BLANK_POWERDOWN, info);
2382 	savage_set_default_par(par, &par->save);
2383 	savage_disable_mmio(par);
2384 	console_unlock();
2385 
2386 	return 0;
2387 }
2388 
2389 static int __maybe_unused savagefb_suspend(struct device *dev)
2390 {
2391 	return savagefb_suspend_late(dev, PMSG_SUSPEND);
2392 }
2393 
2394 static int __maybe_unused savagefb_hibernate(struct device *dev)
2395 {
2396 	return savagefb_suspend_late(dev, PMSG_HIBERNATE);
2397 }
2398 
2399 static int __maybe_unused savagefb_freeze(struct device *dev)
2400 {
2401 	return savagefb_suspend_late(dev, PMSG_FREEZE);
2402 }
2403 
2404 static int __maybe_unused savagefb_resume(struct device *dev)
2405 {
2406 	struct fb_info *info = dev_get_drvdata(dev);
2407 	struct savagefb_par *par = info->par;
2408 	int cur_state = par->pm_state;
2409 
2410 	DBG("savage_resume");
2411 
2412 	par->pm_state = PM_EVENT_ON;
2413 
2414 	/*
2415 	 * The adapter was not powered down coming back from a
2416 	 * PM_EVENT_FREEZE.
2417 	 */
2418 	if (cur_state == PM_EVENT_FREEZE)
2419 		return 0;
2420 
2421 	console_lock();
2422 
2423 	savage_enable_mmio(par);
2424 	savage_init_hw(par);
2425 	savagefb_set_par(info);
2426 	fb_set_suspend(info, 0);
2427 	savagefb_blank(FB_BLANK_UNBLANK, info);
2428 	console_unlock();
2429 
2430 	return 0;
2431 }
2432 
2433 static const struct dev_pm_ops savagefb_pm_ops = {
2434 #ifdef CONFIG_PM_SLEEP
2435 	.suspend	= savagefb_suspend,
2436 	.resume		= savagefb_resume,
2437 	.freeze		= savagefb_freeze,
2438 	.thaw		= savagefb_resume,
2439 	.poweroff	= savagefb_hibernate,
2440 	.restore	= savagefb_resume,
2441 #endif
2442 };
2443 
2444 static const struct pci_device_id savagefb_devices[] = {
2445 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_MX128,
2446 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2447 
2448 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_MX64,
2449 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2450 
2451 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_MX64C,
2452 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2453 
2454 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_IX128SDR,
2455 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2456 
2457 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_IX128DDR,
2458 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2459 
2460 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_IX64SDR,
2461 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2462 
2463 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_IX64DDR,
2464 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2465 
2466 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_IXCSDR,
2467 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2468 
2469 	{PCI_VENDOR_ID_S3, PCI_CHIP_SUPSAV_IXCDDR,
2470 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SUPERSAVAGE},
2471 
2472 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE4,
2473 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE4},
2474 
2475 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE3D,
2476 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE3D},
2477 
2478 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE3D_MV,
2479 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE3D_MV},
2480 
2481 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE2000,
2482 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE2000},
2483 
2484 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE_MX_MV,
2485 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE_MX_MV},
2486 
2487 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE_MX,
2488 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE_MX},
2489 
2490 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE_IX_MV,
2491 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE_IX_MV},
2492 
2493 	{PCI_VENDOR_ID_S3, PCI_CHIP_SAVAGE_IX,
2494 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_SAVAGE_IX},
2495 
2496 	{PCI_VENDOR_ID_S3, PCI_CHIP_PROSAVAGE_PM,
2497 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_PROSAVAGE_PM},
2498 
2499 	{PCI_VENDOR_ID_S3, PCI_CHIP_PROSAVAGE_KM,
2500 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_PROSAVAGE_KM},
2501 
2502 	{PCI_VENDOR_ID_S3, PCI_CHIP_S3TWISTER_P,
2503 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_S3TWISTER_P},
2504 
2505 	{PCI_VENDOR_ID_S3, PCI_CHIP_S3TWISTER_K,
2506 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_S3TWISTER_K},
2507 
2508 	{PCI_VENDOR_ID_S3, PCI_CHIP_PROSAVAGE_DDR,
2509 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_PROSAVAGE_DDR},
2510 
2511 	{PCI_VENDOR_ID_S3, PCI_CHIP_PROSAVAGE_DDRK,
2512 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_PROSAVAGE_DDRK},
2513 
2514 	{0, 0, 0, 0, 0, 0, 0}
2515 };
2516 
2517 MODULE_DEVICE_TABLE(pci, savagefb_devices);
2518 
2519 static struct pci_driver savagefb_driver = {
2520 	.name =     "savagefb",
2521 	.id_table = savagefb_devices,
2522 	.probe =    savagefb_probe,
2523 	.driver.pm = &savagefb_pm_ops,
2524 	.remove =   savagefb_remove,
2525 };
2526 
2527 /* **************************** exit-time only **************************** */
2528 
2529 static void __exit savage_done(void)
2530 {
2531 	DBG("savage_done");
2532 	pci_unregister_driver(&savagefb_driver);
2533 }
2534 
2535 
2536 /* ************************* init in-kernel code ************************** */
2537 
2538 static int __init savagefb_setup(char *options)
2539 {
2540 #ifndef MODULE
2541 	char *this_opt;
2542 
2543 	if (!options || !*options)
2544 		return 0;
2545 
2546 	while ((this_opt = strsep(&options, ",")) != NULL) {
2547 		mode_option = this_opt;
2548 	}
2549 #endif /* !MODULE */
2550 	return 0;
2551 }
2552 
2553 static int __init savagefb_init(void)
2554 {
2555 	char *option;
2556 
2557 	DBG("savagefb_init");
2558 
2559 	if (fb_modesetting_disabled("savagefb"))
2560 		return -ENODEV;
2561 
2562 	if (fb_get_options("savagefb", &option))
2563 		return -ENODEV;
2564 
2565 	savagefb_setup(option);
2566 	return pci_register_driver(&savagefb_driver);
2567 
2568 }
2569 
2570 module_init(savagefb_init);
2571 module_exit(savage_done);
2572 
2573 module_param(mode_option, charp, 0);
2574 MODULE_PARM_DESC(mode_option, "Specify initial video mode");
2575