1 /*
2  * linux/drivers/video/nvidia/nvidia.c - nVidia fb driver
3  *
4  * Copyright 2004 Antonino Daplas <adaplas@pol.net>
5  *
6  * This file is subject to the terms and conditions of the GNU General Public
7  * License.  See the file COPYING in the main directory of this archive
8  * for more details.
9  *
10  */
11 
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/string.h>
16 #include <linux/mm.h>
17 #include <linux/slab.h>
18 #include <linux/delay.h>
19 #include <linux/fb.h>
20 #include <linux/init.h>
21 #include <linux/pci.h>
22 #include <linux/console.h>
23 #include <linux/backlight.h>
24 #ifdef CONFIG_BOOTX_TEXT
25 #include <asm/btext.h>
26 #endif
27 
28 #include "nv_local.h"
29 #include "nv_type.h"
30 #include "nv_proto.h"
31 #include "nv_dma.h"
32 
33 #ifdef CONFIG_FB_NVIDIA_DEBUG
34 #define NVTRACE          printk
35 #else
36 #define NVTRACE          if (0) printk
37 #endif
38 
39 #define NVTRACE_ENTER(...)  NVTRACE("%s START\n", __func__)
40 #define NVTRACE_LEAVE(...)  NVTRACE("%s END\n", __func__)
41 
42 #ifdef CONFIG_FB_NVIDIA_DEBUG
43 #define assert(expr) \
44 	if (!(expr)) { \
45 	printk( "Assertion failed! %s,%s,%s,line=%d\n",\
46 	#expr,__FILE__,__func__,__LINE__); \
47 	BUG(); \
48 	}
49 #else
50 #define assert(expr)
51 #endif
52 
53 #define PFX "nvidiafb: "
54 
55 /* HW cursor parameters */
56 #define MAX_CURS		32
57 
58 static const struct pci_device_id nvidiafb_pci_tbl[] = {
59 	{PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
60 	 PCI_BASE_CLASS_DISPLAY << 16, 0xff0000, 0},
61 	{ 0, }
62 };
63 MODULE_DEVICE_TABLE(pci, nvidiafb_pci_tbl);
64 
65 /* command line data, set in nvidiafb_setup() */
66 static int flatpanel = -1;	/* Autodetect later */
67 static int fpdither = -1;
68 static int forceCRTC = -1;
69 static int hwcur = 0;
70 static int noaccel = 0;
71 static int noscale = 0;
72 static int paneltweak = 0;
73 static int vram = 0;
74 static int bpp = 8;
75 static int reverse_i2c;
76 static bool nomtrr = false;
77 #ifdef CONFIG_PMAC_BACKLIGHT
78 static int backlight = 1;
79 #else
80 static int backlight = 0;
81 #endif
82 
83 static char *mode_option = NULL;
84 
85 static struct fb_fix_screeninfo nvidiafb_fix = {
86 	.type = FB_TYPE_PACKED_PIXELS,
87 	.xpanstep = 8,
88 	.ypanstep = 1,
89 };
90 
91 static struct fb_var_screeninfo nvidiafb_default_var = {
92 	.xres = 640,
93 	.yres = 480,
94 	.xres_virtual = 640,
95 	.yres_virtual = 480,
96 	.bits_per_pixel = 8,
97 	.red = {0, 8, 0},
98 	.green = {0, 8, 0},
99 	.blue = {0, 8, 0},
100 	.transp = {0, 0, 0},
101 	.activate = FB_ACTIVATE_NOW,
102 	.height = -1,
103 	.width = -1,
104 	.pixclock = 39721,
105 	.left_margin = 40,
106 	.right_margin = 24,
107 	.upper_margin = 32,
108 	.lower_margin = 11,
109 	.hsync_len = 96,
110 	.vsync_len = 2,
111 	.vmode = FB_VMODE_NONINTERLACED
112 };
113 
114 static void nvidiafb_load_cursor_image(struct nvidia_par *par, u8 * data8,
115 				       u16 bg, u16 fg, u32 w, u32 h)
116 {
117 	u32 *data = (u32 *) data8;
118 	int i, j, k = 0;
119 	u32 b, tmp;
120 
121 	w = (w + 1) & ~1;
122 
123 	for (i = 0; i < h; i++) {
124 		b = *data++;
125 		reverse_order(&b);
126 
127 		for (j = 0; j < w / 2; j++) {
128 			tmp = 0;
129 #if defined (__BIG_ENDIAN)
130 			tmp = (b & (1 << 31)) ? fg << 16 : bg << 16;
131 			b <<= 1;
132 			tmp |= (b & (1 << 31)) ? fg : bg;
133 			b <<= 1;
134 #else
135 			tmp = (b & 1) ? fg : bg;
136 			b >>= 1;
137 			tmp |= (b & 1) ? fg << 16 : bg << 16;
138 			b >>= 1;
139 #endif
140 			NV_WR32(&par->CURSOR[k++], 0, tmp);
141 		}
142 		k += (MAX_CURS - w) / 2;
143 	}
144 }
145 
146 static void nvidia_write_clut(struct nvidia_par *par,
147 			      u8 regnum, u8 red, u8 green, u8 blue)
148 {
149 	NVWriteDacMask(par, 0xff);
150 	NVWriteDacWriteAddr(par, regnum);
151 	NVWriteDacData(par, red);
152 	NVWriteDacData(par, green);
153 	NVWriteDacData(par, blue);
154 }
155 
156 static void nvidia_read_clut(struct nvidia_par *par,
157 			     u8 regnum, u8 * red, u8 * green, u8 * blue)
158 {
159 	NVWriteDacMask(par, 0xff);
160 	NVWriteDacReadAddr(par, regnum);
161 	*red = NVReadDacData(par);
162 	*green = NVReadDacData(par);
163 	*blue = NVReadDacData(par);
164 }
165 
166 static int nvidia_panel_tweak(struct nvidia_par *par,
167 			      struct _riva_hw_state *state)
168 {
169 	int tweak = 0;
170 
171    if (par->paneltweak) {
172 	   tweak = par->paneltweak;
173    } else {
174 	   /* begin flat panel hacks */
175 	   /* This is unfortunate, but some chips need this register
176 	      tweaked or else you get artifacts where adjacent pixels are
177 	      swapped.  There are no hard rules for what to set here so all
178 	      we can do is experiment and apply hacks. */
179 
180 	   if(((par->Chipset & 0xffff) == 0x0328) && (state->bpp == 32)) {
181 		   /* At least one NV34 laptop needs this workaround. */
182 		   tweak = -1;
183 	   }
184 
185 	   if((par->Chipset & 0xfff0) == 0x0310) {
186 		   tweak = 1;
187 	   }
188 	   /* end flat panel hacks */
189    }
190 
191    return tweak;
192 }
193 
194 static void nvidia_screen_off(struct nvidia_par *par, int on)
195 {
196 	unsigned char tmp;
197 
198 	if (on) {
199 		/*
200 		 * Turn off screen and disable sequencer.
201 		 */
202 		tmp = NVReadSeq(par, 0x01);
203 
204 		NVWriteSeq(par, 0x00, 0x01);		/* Synchronous Reset */
205 		NVWriteSeq(par, 0x01, tmp | 0x20);	/* disable the display */
206 	} else {
207 		/*
208 		 * Reenable sequencer, then turn on screen.
209 		 */
210 
211 		tmp = NVReadSeq(par, 0x01);
212 
213 		NVWriteSeq(par, 0x01, tmp & ~0x20);	/* reenable display */
214 		NVWriteSeq(par, 0x00, 0x03);		/* End Reset */
215 	}
216 }
217 
218 static void nvidia_save_vga(struct nvidia_par *par,
219 			    struct _riva_hw_state *state)
220 {
221 	int i;
222 
223 	NVTRACE_ENTER();
224 	NVLockUnlock(par, 0);
225 
226 	NVUnloadStateExt(par, state);
227 
228 	state->misc_output = NVReadMiscOut(par);
229 
230 	for (i = 0; i < NUM_CRT_REGS; i++)
231 		state->crtc[i] = NVReadCrtc(par, i);
232 
233 	for (i = 0; i < NUM_ATC_REGS; i++)
234 		state->attr[i] = NVReadAttr(par, i);
235 
236 	for (i = 0; i < NUM_GRC_REGS; i++)
237 		state->gra[i] = NVReadGr(par, i);
238 
239 	for (i = 0; i < NUM_SEQ_REGS; i++)
240 		state->seq[i] = NVReadSeq(par, i);
241 	NVTRACE_LEAVE();
242 }
243 
244 #undef DUMP_REG
245 
246 static void nvidia_write_regs(struct nvidia_par *par,
247 			      struct _riva_hw_state *state)
248 {
249 	int i;
250 
251 	NVTRACE_ENTER();
252 
253 	NVLoadStateExt(par, state);
254 
255 	NVWriteMiscOut(par, state->misc_output);
256 
257 	for (i = 1; i < NUM_SEQ_REGS; i++) {
258 #ifdef DUMP_REG
259 		printk(" SEQ[%02x] = %08x\n", i, state->seq[i]);
260 #endif
261 		NVWriteSeq(par, i, state->seq[i]);
262 	}
263 
264 	/* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 of CRTC[17] */
265 	NVWriteCrtc(par, 0x11, state->crtc[0x11] & ~0x80);
266 
267 	for (i = 0; i < NUM_CRT_REGS; i++) {
268 		switch (i) {
269 		case 0x19:
270 		case 0x20 ... 0x40:
271 			break;
272 		default:
273 #ifdef DUMP_REG
274 			printk("CRTC[%02x] = %08x\n", i, state->crtc[i]);
275 #endif
276 			NVWriteCrtc(par, i, state->crtc[i]);
277 		}
278 	}
279 
280 	for (i = 0; i < NUM_GRC_REGS; i++) {
281 #ifdef DUMP_REG
282 		printk(" GRA[%02x] = %08x\n", i, state->gra[i]);
283 #endif
284 		NVWriteGr(par, i, state->gra[i]);
285 	}
286 
287 	for (i = 0; i < NUM_ATC_REGS; i++) {
288 #ifdef DUMP_REG
289 		printk("ATTR[%02x] = %08x\n", i, state->attr[i]);
290 #endif
291 		NVWriteAttr(par, i, state->attr[i]);
292 	}
293 
294 	NVTRACE_LEAVE();
295 }
296 
297 static int nvidia_calc_regs(struct fb_info *info)
298 {
299 	struct nvidia_par *par = info->par;
300 	struct _riva_hw_state *state = &par->ModeReg;
301 	int i, depth = fb_get_color_depth(&info->var, &info->fix);
302 	int h_display = info->var.xres / 8 - 1;
303 	int h_start = (info->var.xres + info->var.right_margin) / 8 - 1;
304 	int h_end = (info->var.xres + info->var.right_margin +
305 		     info->var.hsync_len) / 8 - 1;
306 	int h_total = (info->var.xres + info->var.right_margin +
307 		       info->var.hsync_len + info->var.left_margin) / 8 - 5;
308 	int h_blank_s = h_display;
309 	int h_blank_e = h_total + 4;
310 	int v_display = info->var.yres - 1;
311 	int v_start = info->var.yres + info->var.lower_margin - 1;
312 	int v_end = (info->var.yres + info->var.lower_margin +
313 		     info->var.vsync_len) - 1;
314 	int v_total = (info->var.yres + info->var.lower_margin +
315 		       info->var.vsync_len + info->var.upper_margin) - 2;
316 	int v_blank_s = v_display;
317 	int v_blank_e = v_total + 1;
318 
319 	/*
320 	 * Set all CRTC values.
321 	 */
322 
323 	if (info->var.vmode & FB_VMODE_INTERLACED)
324 		v_total |= 1;
325 
326 	if (par->FlatPanel == 1) {
327 		v_start = v_total - 3;
328 		v_end = v_total - 2;
329 		v_blank_s = v_start;
330 		h_start = h_total - 5;
331 		h_end = h_total - 2;
332 		h_blank_e = h_total + 4;
333 	}
334 
335 	state->crtc[0x0] = Set8Bits(h_total);
336 	state->crtc[0x1] = Set8Bits(h_display);
337 	state->crtc[0x2] = Set8Bits(h_blank_s);
338 	state->crtc[0x3] = SetBitField(h_blank_e, 4: 0, 4:0)
339 		| SetBit(7);
340 	state->crtc[0x4] = Set8Bits(h_start);
341 	state->crtc[0x5] = SetBitField(h_blank_e, 5: 5, 7:7)
342 		| SetBitField(h_end, 4: 0, 4:0);
343 	state->crtc[0x6] = SetBitField(v_total, 7: 0, 7:0);
344 	state->crtc[0x7] = SetBitField(v_total, 8: 8, 0:0)
345 		| SetBitField(v_display, 8: 8, 1:1)
346 		| SetBitField(v_start, 8: 8, 2:2)
347 		| SetBitField(v_blank_s, 8: 8, 3:3)
348 		| SetBit(4)
349 		| SetBitField(v_total, 9: 9, 5:5)
350 		| SetBitField(v_display, 9: 9, 6:6)
351 		| SetBitField(v_start, 9: 9, 7:7);
352 	state->crtc[0x9] = SetBitField(v_blank_s, 9: 9, 5:5)
353 		| SetBit(6)
354 		| ((info->var.vmode & FB_VMODE_DOUBLE) ? 0x80 : 0x00);
355 	state->crtc[0x10] = Set8Bits(v_start);
356 	state->crtc[0x11] = SetBitField(v_end, 3: 0, 3:0) | SetBit(5);
357 	state->crtc[0x12] = Set8Bits(v_display);
358 	state->crtc[0x13] = ((info->var.xres_virtual / 8) *
359 			     (info->var.bits_per_pixel / 8));
360 	state->crtc[0x15] = Set8Bits(v_blank_s);
361 	state->crtc[0x16] = Set8Bits(v_blank_e);
362 
363 	state->attr[0x10] = 0x01;
364 
365 	if (par->Television)
366 		state->attr[0x11] = 0x00;
367 
368 	state->screen = SetBitField(h_blank_e, 6: 6, 4:4)
369 		| SetBitField(v_blank_s, 10: 10, 3:3)
370 		| SetBitField(v_start, 10: 10, 2:2)
371 		| SetBitField(v_display, 10: 10, 1:1)
372 		| SetBitField(v_total, 10: 10, 0:0);
373 
374 	state->horiz = SetBitField(h_total, 8: 8, 0:0)
375 		| SetBitField(h_display, 8: 8, 1:1)
376 		| SetBitField(h_blank_s, 8: 8, 2:2)
377 		| SetBitField(h_start, 8: 8, 3:3);
378 
379 	state->extra = SetBitField(v_total, 11: 11, 0:0)
380 		| SetBitField(v_display, 11: 11, 2:2)
381 		| SetBitField(v_start, 11: 11, 4:4)
382 		| SetBitField(v_blank_s, 11: 11, 6:6);
383 
384 	if (info->var.vmode & FB_VMODE_INTERLACED) {
385 		h_total = (h_total >> 1) & ~1;
386 		state->interlace = Set8Bits(h_total);
387 		state->horiz |= SetBitField(h_total, 8: 8, 4:4);
388 	} else {
389 		state->interlace = 0xff;	/* interlace off */
390 	}
391 
392 	/*
393 	 * Calculate the extended registers.
394 	 */
395 
396 	if (depth < 24)
397 		i = depth;
398 	else
399 		i = 32;
400 
401 	if (par->Architecture >= NV_ARCH_10)
402 		par->CURSOR = (volatile u32 __iomem *)(info->screen_base +
403 						       par->CursorStart);
404 
405 	if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
406 		state->misc_output &= ~0x40;
407 	else
408 		state->misc_output |= 0x40;
409 	if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
410 		state->misc_output &= ~0x80;
411 	else
412 		state->misc_output |= 0x80;
413 
414 	NVCalcStateExt(par, state, i, info->var.xres_virtual,
415 		       info->var.xres, info->var.yres_virtual,
416 		       1000000000 / info->var.pixclock, info->var.vmode);
417 
418 	state->scale = NV_RD32(par->PRAMDAC, 0x00000848) & 0xfff000ff;
419 	if (par->FlatPanel == 1) {
420 		state->pixel |= (1 << 7);
421 
422 		if (!par->fpScaler || (par->fpWidth <= info->var.xres)
423 		    || (par->fpHeight <= info->var.yres)) {
424 			state->scale |= (1 << 8);
425 		}
426 
427 		if (!par->crtcSync_read) {
428 			state->crtcSync = NV_RD32(par->PRAMDAC, 0x0828);
429 			par->crtcSync_read = 1;
430 		}
431 
432 		par->PanelTweak = nvidia_panel_tweak(par, state);
433 	}
434 
435 	state->vpll = state->pll;
436 	state->vpll2 = state->pll;
437 	state->vpllB = state->pllB;
438 	state->vpll2B = state->pllB;
439 
440 	VGA_WR08(par->PCIO, 0x03D4, 0x1C);
441 	state->fifo = VGA_RD08(par->PCIO, 0x03D5) & ~(1<<5);
442 
443 	if (par->CRTCnumber) {
444 		state->head = NV_RD32(par->PCRTC0, 0x00000860) & ~0x00001000;
445 		state->head2 = NV_RD32(par->PCRTC0, 0x00002860) | 0x00001000;
446 		state->crtcOwner = 3;
447 		state->pllsel |= 0x20000800;
448 		state->vpll = NV_RD32(par->PRAMDAC0, 0x00000508);
449 		if (par->twoStagePLL)
450 			state->vpllB = NV_RD32(par->PRAMDAC0, 0x00000578);
451 	} else if (par->twoHeads) {
452 		state->head = NV_RD32(par->PCRTC0, 0x00000860) | 0x00001000;
453 		state->head2 = NV_RD32(par->PCRTC0, 0x00002860) & ~0x00001000;
454 		state->crtcOwner = 0;
455 		state->vpll2 = NV_RD32(par->PRAMDAC0, 0x0520);
456 		if (par->twoStagePLL)
457 			state->vpll2B = NV_RD32(par->PRAMDAC0, 0x057C);
458 	}
459 
460 	state->cursorConfig = 0x00000100;
461 
462 	if (info->var.vmode & FB_VMODE_DOUBLE)
463 		state->cursorConfig |= (1 << 4);
464 
465 	if (par->alphaCursor) {
466 		if ((par->Chipset & 0x0ff0) != 0x0110)
467 			state->cursorConfig |= 0x04011000;
468 		else
469 			state->cursorConfig |= 0x14011000;
470 		state->general |= (1 << 29);
471 	} else
472 		state->cursorConfig |= 0x02000000;
473 
474 	if (par->twoHeads) {
475 		if ((par->Chipset & 0x0ff0) == 0x0110) {
476 			state->dither = NV_RD32(par->PRAMDAC, 0x0528) &
477 			    ~0x00010000;
478 			if (par->FPDither)
479 				state->dither |= 0x00010000;
480 		} else {
481 			state->dither = NV_RD32(par->PRAMDAC, 0x083C) & ~1;
482 			if (par->FPDither)
483 				state->dither |= 1;
484 		}
485 	}
486 
487 	state->timingH = 0;
488 	state->timingV = 0;
489 	state->displayV = info->var.xres;
490 
491 	return 0;
492 }
493 
494 static void nvidia_init_vga(struct fb_info *info)
495 {
496 	struct nvidia_par *par = info->par;
497 	struct _riva_hw_state *state = &par->ModeReg;
498 	int i;
499 
500 	for (i = 0; i < 0x10; i++)
501 		state->attr[i] = i;
502 	state->attr[0x10] = 0x41;
503 	state->attr[0x11] = 0xff;
504 	state->attr[0x12] = 0x0f;
505 	state->attr[0x13] = 0x00;
506 	state->attr[0x14] = 0x00;
507 
508 	memset(state->crtc, 0x00, NUM_CRT_REGS);
509 	state->crtc[0x0a] = 0x20;
510 	state->crtc[0x17] = 0xe3;
511 	state->crtc[0x18] = 0xff;
512 	state->crtc[0x28] = 0x40;
513 
514 	memset(state->gra, 0x00, NUM_GRC_REGS);
515 	state->gra[0x05] = 0x40;
516 	state->gra[0x06] = 0x05;
517 	state->gra[0x07] = 0x0f;
518 	state->gra[0x08] = 0xff;
519 
520 	state->seq[0x00] = 0x03;
521 	state->seq[0x01] = 0x01;
522 	state->seq[0x02] = 0x0f;
523 	state->seq[0x03] = 0x00;
524 	state->seq[0x04] = 0x0e;
525 
526 	state->misc_output = 0xeb;
527 }
528 
529 static int nvidiafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
530 {
531 	struct nvidia_par *par = info->par;
532 	u8 data[MAX_CURS * MAX_CURS / 8];
533 	int i, set = cursor->set;
534 	u16 fg, bg;
535 
536 	if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS)
537 		return -ENXIO;
538 
539 	NVShowHideCursor(par, 0);
540 
541 	if (par->cursor_reset) {
542 		set = FB_CUR_SETALL;
543 		par->cursor_reset = 0;
544 	}
545 
546 	if (set & FB_CUR_SETSIZE)
547 		memset_io(par->CURSOR, 0, MAX_CURS * MAX_CURS * 2);
548 
549 	if (set & FB_CUR_SETPOS) {
550 		u32 xx, yy, temp;
551 
552 		yy = cursor->image.dy - info->var.yoffset;
553 		xx = cursor->image.dx - info->var.xoffset;
554 		temp = xx & 0xFFFF;
555 		temp |= yy << 16;
556 
557 		NV_WR32(par->PRAMDAC, 0x0000300, temp);
558 	}
559 
560 	if (set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) {
561 		u32 bg_idx = cursor->image.bg_color;
562 		u32 fg_idx = cursor->image.fg_color;
563 		u32 s_pitch = (cursor->image.width + 7) >> 3;
564 		u32 d_pitch = MAX_CURS / 8;
565 		u8 *dat = (u8 *) cursor->image.data;
566 		u8 *msk = (u8 *) cursor->mask;
567 		u8 *src;
568 
569 		src = kmalloc(s_pitch * cursor->image.height, GFP_ATOMIC);
570 
571 		if (src) {
572 			switch (cursor->rop) {
573 			case ROP_XOR:
574 				for (i = 0; i < s_pitch * cursor->image.height; i++)
575 					src[i] = dat[i] ^ msk[i];
576 				break;
577 			case ROP_COPY:
578 			default:
579 				for (i = 0; i < s_pitch * cursor->image.height; i++)
580 					src[i] = dat[i] & msk[i];
581 				break;
582 			}
583 
584 			fb_pad_aligned_buffer(data, d_pitch, src, s_pitch,
585 						cursor->image.height);
586 
587 			bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
588 			    ((info->cmap.green[bg_idx] & 0xf8) << 2) |
589 			    ((info->cmap.blue[bg_idx] & 0xf8) >> 3) | 1 << 15;
590 
591 			fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
592 			    ((info->cmap.green[fg_idx] & 0xf8) << 2) |
593 			    ((info->cmap.blue[fg_idx] & 0xf8) >> 3) | 1 << 15;
594 
595 			NVLockUnlock(par, 0);
596 
597 			nvidiafb_load_cursor_image(par, data, bg, fg,
598 						   cursor->image.width,
599 						   cursor->image.height);
600 			kfree(src);
601 		}
602 	}
603 
604 	if (cursor->enable)
605 		NVShowHideCursor(par, 1);
606 
607 	return 0;
608 }
609 
610 static int nvidiafb_set_par(struct fb_info *info)
611 {
612 	struct nvidia_par *par = info->par;
613 
614 	NVTRACE_ENTER();
615 
616 	NVLockUnlock(par, 1);
617 	if (!par->FlatPanel || !par->twoHeads)
618 		par->FPDither = 0;
619 
620 	if (par->FPDither < 0) {
621 		if ((par->Chipset & 0x0ff0) == 0x0110)
622 			par->FPDither = !!(NV_RD32(par->PRAMDAC, 0x0528)
623 					   & 0x00010000);
624 		else
625 			par->FPDither = !!(NV_RD32(par->PRAMDAC, 0x083C) & 1);
626 		printk(KERN_INFO PFX "Flat panel dithering %s\n",
627 		       par->FPDither ? "enabled" : "disabled");
628 	}
629 
630 	info->fix.visual = (info->var.bits_per_pixel == 8) ?
631 	    FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
632 
633 	nvidia_init_vga(info);
634 	nvidia_calc_regs(info);
635 
636 	NVLockUnlock(par, 0);
637 	if (par->twoHeads) {
638 		VGA_WR08(par->PCIO, 0x03D4, 0x44);
639 		VGA_WR08(par->PCIO, 0x03D5, par->ModeReg.crtcOwner);
640 		NVLockUnlock(par, 0);
641 	}
642 
643 	nvidia_screen_off(par, 1);
644 
645 	nvidia_write_regs(par, &par->ModeReg);
646 	NVSetStartAddress(par, 0);
647 
648 #if defined (__BIG_ENDIAN)
649 	/* turn on LFB swapping */
650 	{
651 		unsigned char tmp;
652 
653 		VGA_WR08(par->PCIO, 0x3d4, 0x46);
654 		tmp = VGA_RD08(par->PCIO, 0x3d5);
655 		tmp |= (1 << 7);
656 		VGA_WR08(par->PCIO, 0x3d5, tmp);
657     }
658 #endif
659 
660 	info->fix.line_length = (info->var.xres_virtual *
661 				 info->var.bits_per_pixel) >> 3;
662 	if (info->var.accel_flags) {
663 		info->fbops->fb_imageblit = nvidiafb_imageblit;
664 		info->fbops->fb_fillrect = nvidiafb_fillrect;
665 		info->fbops->fb_copyarea = nvidiafb_copyarea;
666 		info->fbops->fb_sync = nvidiafb_sync;
667 		info->pixmap.scan_align = 4;
668 		info->flags &= ~FBINFO_HWACCEL_DISABLED;
669 		info->flags |= FBINFO_READS_FAST;
670 		NVResetGraphics(info);
671 	} else {
672 		info->fbops->fb_imageblit = cfb_imageblit;
673 		info->fbops->fb_fillrect = cfb_fillrect;
674 		info->fbops->fb_copyarea = cfb_copyarea;
675 		info->fbops->fb_sync = NULL;
676 		info->pixmap.scan_align = 1;
677 		info->flags |= FBINFO_HWACCEL_DISABLED;
678 		info->flags &= ~FBINFO_READS_FAST;
679 	}
680 
681 	par->cursor_reset = 1;
682 
683 	nvidia_screen_off(par, 0);
684 
685 #ifdef CONFIG_BOOTX_TEXT
686 	/* Update debug text engine */
687 	btext_update_display(info->fix.smem_start,
688 			     info->var.xres, info->var.yres,
689 			     info->var.bits_per_pixel, info->fix.line_length);
690 #endif
691 
692 	NVLockUnlock(par, 0);
693 	NVTRACE_LEAVE();
694 	return 0;
695 }
696 
697 static int nvidiafb_setcolreg(unsigned regno, unsigned red, unsigned green,
698 			      unsigned blue, unsigned transp,
699 			      struct fb_info *info)
700 {
701 	struct nvidia_par *par = info->par;
702 	int i;
703 
704 	NVTRACE_ENTER();
705 	if (regno >= (1 << info->var.green.length))
706 		return -EINVAL;
707 
708 	if (info->var.grayscale) {
709 		/* gray = 0.30*R + 0.59*G + 0.11*B */
710 		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
711 	}
712 
713 	if (regno < 16 && info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
714 		((u32 *) info->pseudo_palette)[regno] =
715 		    (regno << info->var.red.offset) |
716 		    (regno << info->var.green.offset) |
717 		    (regno << info->var.blue.offset);
718 	}
719 
720 	switch (info->var.bits_per_pixel) {
721 	case 8:
722 		/* "transparent" stuff is completely ignored. */
723 		nvidia_write_clut(par, regno, red >> 8, green >> 8, blue >> 8);
724 		break;
725 	case 16:
726 		if (info->var.green.length == 5) {
727 			for (i = 0; i < 8; i++) {
728 				nvidia_write_clut(par, regno * 8 + i, red >> 8,
729 						  green >> 8, blue >> 8);
730 			}
731 		} else {
732 			u8 r, g, b;
733 
734 			if (regno < 32) {
735 				for (i = 0; i < 8; i++) {
736 					nvidia_write_clut(par, regno * 8 + i,
737 							  red >> 8, green >> 8,
738 							  blue >> 8);
739 				}
740 			}
741 
742 			nvidia_read_clut(par, regno * 4, &r, &g, &b);
743 
744 			for (i = 0; i < 4; i++)
745 				nvidia_write_clut(par, regno * 4 + i, r,
746 						  green >> 8, b);
747 		}
748 		break;
749 	case 32:
750 		nvidia_write_clut(par, regno, red >> 8, green >> 8, blue >> 8);
751 		break;
752 	default:
753 		/* do nothing */
754 		break;
755 	}
756 
757 	NVTRACE_LEAVE();
758 	return 0;
759 }
760 
761 static int nvidiafb_check_var(struct fb_var_screeninfo *var,
762 			      struct fb_info *info)
763 {
764 	struct nvidia_par *par = info->par;
765 	int memlen, vramlen, mode_valid = 0;
766 	int pitch, err = 0;
767 
768 	NVTRACE_ENTER();
769 
770 	var->transp.offset = 0;
771 	var->transp.length = 0;
772 
773 	var->xres &= ~7;
774 
775 	if (var->bits_per_pixel <= 8)
776 		var->bits_per_pixel = 8;
777 	else if (var->bits_per_pixel <= 16)
778 		var->bits_per_pixel = 16;
779 	else
780 		var->bits_per_pixel = 32;
781 
782 	switch (var->bits_per_pixel) {
783 	case 8:
784 		var->red.offset = 0;
785 		var->red.length = 8;
786 		var->green.offset = 0;
787 		var->green.length = 8;
788 		var->blue.offset = 0;
789 		var->blue.length = 8;
790 		var->transp.offset = 0;
791 		var->transp.length = 0;
792 		break;
793 	case 16:
794 		var->green.length = (var->green.length < 6) ? 5 : 6;
795 		var->red.length = 5;
796 		var->blue.length = 5;
797 		var->transp.length = 6 - var->green.length;
798 		var->blue.offset = 0;
799 		var->green.offset = 5;
800 		var->red.offset = 5 + var->green.length;
801 		var->transp.offset = (5 + var->red.offset) & 15;
802 		break;
803 	case 32:		/* RGBA 8888 */
804 		var->red.offset = 16;
805 		var->red.length = 8;
806 		var->green.offset = 8;
807 		var->green.length = 8;
808 		var->blue.offset = 0;
809 		var->blue.length = 8;
810 		var->transp.length = 8;
811 		var->transp.offset = 24;
812 		break;
813 	}
814 
815 	var->red.msb_right = 0;
816 	var->green.msb_right = 0;
817 	var->blue.msb_right = 0;
818 	var->transp.msb_right = 0;
819 
820 	if (!info->monspecs.hfmax || !info->monspecs.vfmax ||
821 	    !info->monspecs.dclkmax || !fb_validate_mode(var, info))
822 		mode_valid = 1;
823 
824 	/* calculate modeline if supported by monitor */
825 	if (!mode_valid && info->monspecs.gtf) {
826 		if (!fb_get_mode(FB_MAXTIMINGS, 0, var, info))
827 			mode_valid = 1;
828 	}
829 
830 	if (!mode_valid) {
831 		const struct fb_videomode *mode;
832 
833 		mode = fb_find_best_mode(var, &info->modelist);
834 		if (mode) {
835 			fb_videomode_to_var(var, mode);
836 			mode_valid = 1;
837 		}
838 	}
839 
840 	if (!mode_valid && info->monspecs.modedb_len)
841 		return -EINVAL;
842 
843 	/*
844 	 * If we're on a flat panel, check if the mode is outside of the
845 	 * panel dimensions. If so, cap it and try for the next best mode
846 	 * before bailing out.
847 	 */
848 	if (par->fpWidth && par->fpHeight && (par->fpWidth < var->xres ||
849 					      par->fpHeight < var->yres)) {
850 		const struct fb_videomode *mode;
851 
852 		var->xres = par->fpWidth;
853 		var->yres = par->fpHeight;
854 
855 		mode = fb_find_best_mode(var, &info->modelist);
856 		if (!mode) {
857 			printk(KERN_ERR PFX "mode out of range of flat "
858 			       "panel dimensions\n");
859 			return -EINVAL;
860 		}
861 
862 		fb_videomode_to_var(var, mode);
863 	}
864 
865 	if (var->yres_virtual < var->yres)
866 		var->yres_virtual = var->yres;
867 
868 	if (var->xres_virtual < var->xres)
869 		var->xres_virtual = var->xres;
870 
871 	var->xres_virtual = (var->xres_virtual + 63) & ~63;
872 
873 	vramlen = info->screen_size;
874 	pitch = ((var->xres_virtual * var->bits_per_pixel) + 7) / 8;
875 	memlen = pitch * var->yres_virtual;
876 
877 	if (memlen > vramlen) {
878 		var->yres_virtual = vramlen / pitch;
879 
880 		if (var->yres_virtual < var->yres) {
881 			var->yres_virtual = var->yres;
882 			var->xres_virtual = vramlen / var->yres_virtual;
883 			var->xres_virtual /= var->bits_per_pixel / 8;
884 			var->xres_virtual &= ~63;
885 			pitch = (var->xres_virtual *
886 				 var->bits_per_pixel + 7) / 8;
887 			memlen = pitch * var->yres;
888 
889 			if (var->xres_virtual < var->xres) {
890 				printk("nvidiafb: required video memory, "
891 				       "%d bytes, for %dx%d-%d (virtual) "
892 				       "is out of range\n",
893 				       memlen, var->xres_virtual,
894 				       var->yres_virtual, var->bits_per_pixel);
895 				err = -ENOMEM;
896 			}
897 		}
898 	}
899 
900 	if (var->accel_flags) {
901 		if (var->yres_virtual > 0x7fff)
902 			var->yres_virtual = 0x7fff;
903 		if (var->xres_virtual > 0x7fff)
904 			var->xres_virtual = 0x7fff;
905 	}
906 
907 	var->xres_virtual &= ~63;
908 
909 	NVTRACE_LEAVE();
910 
911 	return err;
912 }
913 
914 static int nvidiafb_pan_display(struct fb_var_screeninfo *var,
915 				struct fb_info *info)
916 {
917 	struct nvidia_par *par = info->par;
918 	u32 total;
919 
920 	total = var->yoffset * info->fix.line_length + var->xoffset;
921 
922 	NVSetStartAddress(par, total);
923 
924 	return 0;
925 }
926 
927 static int nvidiafb_blank(int blank, struct fb_info *info)
928 {
929 	struct nvidia_par *par = info->par;
930 	unsigned char tmp, vesa;
931 
932 	tmp = NVReadSeq(par, 0x01) & ~0x20;	/* screen on/off */
933 	vesa = NVReadCrtc(par, 0x1a) & ~0xc0;	/* sync on/off */
934 
935 	NVTRACE_ENTER();
936 
937 	if (blank)
938 		tmp |= 0x20;
939 
940 	switch (blank) {
941 	case FB_BLANK_UNBLANK:
942 	case FB_BLANK_NORMAL:
943 		break;
944 	case FB_BLANK_VSYNC_SUSPEND:
945 		vesa |= 0x80;
946 		break;
947 	case FB_BLANK_HSYNC_SUSPEND:
948 		vesa |= 0x40;
949 		break;
950 	case FB_BLANK_POWERDOWN:
951 		vesa |= 0xc0;
952 		break;
953 	}
954 
955 	NVWriteSeq(par, 0x01, tmp);
956 	NVWriteCrtc(par, 0x1a, vesa);
957 
958 	NVTRACE_LEAVE();
959 
960 	return 0;
961 }
962 
963 /*
964  * Because the VGA registers are not mapped linearly in its MMIO space,
965  * restrict VGA register saving and restore to x86 only, where legacy VGA IO
966  * access is legal. Consequently, we must also check if the device is the
967  * primary display.
968  */
969 #ifdef CONFIG_X86
970 static void save_vga_x86(struct nvidia_par *par)
971 {
972 	struct resource *res= &par->pci_dev->resource[PCI_ROM_RESOURCE];
973 
974 	if (res && res->flags & IORESOURCE_ROM_SHADOW) {
975 		memset(&par->vgastate, 0, sizeof(par->vgastate));
976 		par->vgastate.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS |
977 			VGA_SAVE_CMAP;
978 		save_vga(&par->vgastate);
979 	}
980 }
981 
982 static void restore_vga_x86(struct nvidia_par *par)
983 {
984 	struct resource *res= &par->pci_dev->resource[PCI_ROM_RESOURCE];
985 
986 	if (res && res->flags & IORESOURCE_ROM_SHADOW)
987 		restore_vga(&par->vgastate);
988 }
989 #else
990 #define save_vga_x86(x) do {} while (0)
991 #define restore_vga_x86(x) do {} while (0)
992 #endif /* X86 */
993 
994 static int nvidiafb_open(struct fb_info *info, int user)
995 {
996 	struct nvidia_par *par = info->par;
997 
998 	if (!par->open_count) {
999 		save_vga_x86(par);
1000 		nvidia_save_vga(par, &par->initial_state);
1001 	}
1002 
1003 	par->open_count++;
1004 	return 0;
1005 }
1006 
1007 static int nvidiafb_release(struct fb_info *info, int user)
1008 {
1009 	struct nvidia_par *par = info->par;
1010 	int err = 0;
1011 
1012 	if (!par->open_count) {
1013 		err = -EINVAL;
1014 		goto done;
1015 	}
1016 
1017 	if (par->open_count == 1) {
1018 		nvidia_write_regs(par, &par->initial_state);
1019 		restore_vga_x86(par);
1020 	}
1021 
1022 	par->open_count--;
1023 done:
1024 	return err;
1025 }
1026 
1027 static struct fb_ops nvidia_fb_ops = {
1028 	.owner          = THIS_MODULE,
1029 	.fb_open        = nvidiafb_open,
1030 	.fb_release     = nvidiafb_release,
1031 	.fb_check_var   = nvidiafb_check_var,
1032 	.fb_set_par     = nvidiafb_set_par,
1033 	.fb_setcolreg   = nvidiafb_setcolreg,
1034 	.fb_pan_display = nvidiafb_pan_display,
1035 	.fb_blank       = nvidiafb_blank,
1036 	.fb_fillrect    = nvidiafb_fillrect,
1037 	.fb_copyarea    = nvidiafb_copyarea,
1038 	.fb_imageblit   = nvidiafb_imageblit,
1039 	.fb_cursor      = nvidiafb_cursor,
1040 	.fb_sync        = nvidiafb_sync,
1041 };
1042 
1043 #ifdef CONFIG_PM
1044 static int nvidiafb_suspend(struct pci_dev *dev, pm_message_t mesg)
1045 {
1046 	struct fb_info *info = pci_get_drvdata(dev);
1047 	struct nvidia_par *par = info->par;
1048 
1049 	if (mesg.event == PM_EVENT_PRETHAW)
1050 		mesg.event = PM_EVENT_FREEZE;
1051 	console_lock();
1052 	par->pm_state = mesg.event;
1053 
1054 	if (mesg.event & PM_EVENT_SLEEP) {
1055 		fb_set_suspend(info, 1);
1056 		nvidiafb_blank(FB_BLANK_POWERDOWN, info);
1057 		nvidia_write_regs(par, &par->SavedReg);
1058 		pci_save_state(dev);
1059 		pci_disable_device(dev);
1060 		pci_set_power_state(dev, pci_choose_state(dev, mesg));
1061 	}
1062 	dev->dev.power.power_state = mesg;
1063 
1064 	console_unlock();
1065 	return 0;
1066 }
1067 
1068 static int nvidiafb_resume(struct pci_dev *dev)
1069 {
1070 	struct fb_info *info = pci_get_drvdata(dev);
1071 	struct nvidia_par *par = info->par;
1072 
1073 	console_lock();
1074 	pci_set_power_state(dev, PCI_D0);
1075 
1076 	if (par->pm_state != PM_EVENT_FREEZE) {
1077 		pci_restore_state(dev);
1078 
1079 		if (pci_enable_device(dev))
1080 			goto fail;
1081 
1082 		pci_set_master(dev);
1083 	}
1084 
1085 	par->pm_state = PM_EVENT_ON;
1086 	nvidiafb_set_par(info);
1087 	fb_set_suspend (info, 0);
1088 	nvidiafb_blank(FB_BLANK_UNBLANK, info);
1089 
1090 fail:
1091 	console_unlock();
1092 	return 0;
1093 }
1094 #else
1095 #define nvidiafb_suspend NULL
1096 #define nvidiafb_resume NULL
1097 #endif
1098 
1099 static int nvidia_set_fbinfo(struct fb_info *info)
1100 {
1101 	struct fb_monspecs *specs = &info->monspecs;
1102 	struct fb_videomode modedb;
1103 	struct nvidia_par *par = info->par;
1104 	int lpitch;
1105 
1106 	NVTRACE_ENTER();
1107 	info->flags = FBINFO_DEFAULT
1108 	    | FBINFO_HWACCEL_IMAGEBLIT
1109 	    | FBINFO_HWACCEL_FILLRECT
1110 	    | FBINFO_HWACCEL_COPYAREA
1111 	    | FBINFO_HWACCEL_YPAN;
1112 
1113 	fb_videomode_to_modelist(info->monspecs.modedb,
1114 				 info->monspecs.modedb_len, &info->modelist);
1115 	fb_var_to_videomode(&modedb, &nvidiafb_default_var);
1116 
1117 	switch (bpp) {
1118 	case 0 ... 8:
1119 		bpp = 8;
1120 		break;
1121 	case 9 ... 16:
1122 		bpp = 16;
1123 		break;
1124 	default:
1125 		bpp = 32;
1126 		break;
1127 	}
1128 
1129 	if (specs->modedb != NULL) {
1130 		const struct fb_videomode *mode;
1131 
1132 		mode = fb_find_best_display(specs, &info->modelist);
1133 		fb_videomode_to_var(&nvidiafb_default_var, mode);
1134 		nvidiafb_default_var.bits_per_pixel = bpp;
1135 	} else if (par->fpWidth && par->fpHeight) {
1136 		char buf[16];
1137 
1138 		memset(buf, 0, 16);
1139 		snprintf(buf, 15, "%dx%dMR", par->fpWidth, par->fpHeight);
1140 		fb_find_mode(&nvidiafb_default_var, info, buf, specs->modedb,
1141 			     specs->modedb_len, &modedb, bpp);
1142 	}
1143 
1144 	if (mode_option)
1145 		fb_find_mode(&nvidiafb_default_var, info, mode_option,
1146 			     specs->modedb, specs->modedb_len, &modedb, bpp);
1147 
1148 	info->var = nvidiafb_default_var;
1149 	info->fix.visual = (info->var.bits_per_pixel == 8) ?
1150 		FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
1151 	info->pseudo_palette = par->pseudo_palette;
1152 	fb_alloc_cmap(&info->cmap, 256, 0);
1153 	fb_destroy_modedb(info->monspecs.modedb);
1154 	info->monspecs.modedb = NULL;
1155 
1156 	/* maximize virtual vertical length */
1157 	lpitch = info->var.xres_virtual *
1158 		((info->var.bits_per_pixel + 7) >> 3);
1159 	info->var.yres_virtual = info->screen_size / lpitch;
1160 
1161 	info->pixmap.scan_align = 4;
1162 	info->pixmap.buf_align = 4;
1163 	info->pixmap.access_align = 32;
1164 	info->pixmap.size = 8 * 1024;
1165 	info->pixmap.flags = FB_PIXMAP_SYSTEM;
1166 
1167 	if (!hwcur)
1168 	    info->fbops->fb_cursor = NULL;
1169 
1170 	info->var.accel_flags = (!noaccel);
1171 
1172 	switch (par->Architecture) {
1173 	case NV_ARCH_04:
1174 		info->fix.accel = FB_ACCEL_NV4;
1175 		break;
1176 	case NV_ARCH_10:
1177 		info->fix.accel = FB_ACCEL_NV_10;
1178 		break;
1179 	case NV_ARCH_20:
1180 		info->fix.accel = FB_ACCEL_NV_20;
1181 		break;
1182 	case NV_ARCH_30:
1183 		info->fix.accel = FB_ACCEL_NV_30;
1184 		break;
1185 	case NV_ARCH_40:
1186 		info->fix.accel = FB_ACCEL_NV_40;
1187 		break;
1188 	}
1189 
1190 	NVTRACE_LEAVE();
1191 
1192 	return nvidiafb_check_var(&info->var, info);
1193 }
1194 
1195 static u32 nvidia_get_chipset(struct fb_info *info)
1196 {
1197 	struct nvidia_par *par = info->par;
1198 	u32 id = (par->pci_dev->vendor << 16) | par->pci_dev->device;
1199 
1200 	printk(KERN_INFO PFX "Device ID: %x \n", id);
1201 
1202 	if ((id & 0xfff0) == 0x00f0 ||
1203 	    (id & 0xfff0) == 0x02e0) {
1204 		/* pci-e */
1205 		id = NV_RD32(par->REGS, 0x1800);
1206 
1207 		if ((id & 0x0000ffff) == 0x000010DE)
1208 			id = 0x10DE0000 | (id >> 16);
1209 		else if ((id & 0xffff0000) == 0xDE100000) /* wrong endian */
1210 			id = 0x10DE0000 | ((id << 8) & 0x0000ff00) |
1211                             ((id >> 8) & 0x000000ff);
1212 		printk(KERN_INFO PFX "Subsystem ID: %x \n", id);
1213 	}
1214 
1215 	return id;
1216 }
1217 
1218 static u32 nvidia_get_arch(struct fb_info *info)
1219 {
1220 	struct nvidia_par *par = info->par;
1221 	u32 arch = 0;
1222 
1223 	switch (par->Chipset & 0x0ff0) {
1224 	case 0x0100:		/* GeForce 256 */
1225 	case 0x0110:		/* GeForce2 MX */
1226 	case 0x0150:		/* GeForce2 */
1227 	case 0x0170:		/* GeForce4 MX */
1228 	case 0x0180:		/* GeForce4 MX (8x AGP) */
1229 	case 0x01A0:		/* nForce */
1230 	case 0x01F0:		/* nForce2 */
1231 		arch = NV_ARCH_10;
1232 		break;
1233 	case 0x0200:		/* GeForce3 */
1234 	case 0x0250:		/* GeForce4 Ti */
1235 	case 0x0280:		/* GeForce4 Ti (8x AGP) */
1236 		arch = NV_ARCH_20;
1237 		break;
1238 	case 0x0300:		/* GeForceFX 5800 */
1239 	case 0x0310:		/* GeForceFX 5600 */
1240 	case 0x0320:		/* GeForceFX 5200 */
1241 	case 0x0330:		/* GeForceFX 5900 */
1242 	case 0x0340:		/* GeForceFX 5700 */
1243 		arch = NV_ARCH_30;
1244 		break;
1245 	case 0x0040:		/* GeForce 6800 */
1246 	case 0x00C0:		/* GeForce 6800 */
1247 	case 0x0120:		/* GeForce 6800 */
1248 	case 0x0140:		/* GeForce 6600 */
1249 	case 0x0160:		/* GeForce 6200 */
1250 	case 0x01D0:		/* GeForce 7200, 7300, 7400 */
1251 	case 0x0090:		/* GeForce 7800 */
1252 	case 0x0210:		/* GeForce 6800 */
1253 	case 0x0220:		/* GeForce 6200 */
1254 	case 0x0240:		/* GeForce 6100 */
1255 	case 0x0290:		/* GeForce 7900 */
1256 	case 0x0390:		/* GeForce 7600 */
1257 	case 0x03D0:
1258 		arch = NV_ARCH_40;
1259 		break;
1260 	case 0x0020:		/* TNT, TNT2 */
1261 		arch = NV_ARCH_04;
1262 		break;
1263 	default:		/* unknown architecture */
1264 		break;
1265 	}
1266 
1267 	return arch;
1268 }
1269 
1270 static int nvidiafb_probe(struct pci_dev *pd, const struct pci_device_id *ent)
1271 {
1272 	struct nvidia_par *par;
1273 	struct fb_info *info;
1274 	unsigned short cmd;
1275 
1276 
1277 	NVTRACE_ENTER();
1278 	assert(pd != NULL);
1279 
1280 	info = framebuffer_alloc(sizeof(struct nvidia_par), &pd->dev);
1281 
1282 	if (!info)
1283 		goto err_out;
1284 
1285 	par = info->par;
1286 	par->pci_dev = pd;
1287 	info->pixmap.addr = kzalloc(8 * 1024, GFP_KERNEL);
1288 
1289 	if (info->pixmap.addr == NULL)
1290 		goto err_out_kfree;
1291 
1292 	if (pci_enable_device(pd)) {
1293 		printk(KERN_ERR PFX "cannot enable PCI device\n");
1294 		goto err_out_enable;
1295 	}
1296 
1297 	if (pci_request_regions(pd, "nvidiafb")) {
1298 		printk(KERN_ERR PFX "cannot request PCI regions\n");
1299 		goto err_out_enable;
1300 	}
1301 
1302 	par->FlatPanel = flatpanel;
1303 	if (flatpanel == 1)
1304 		printk(KERN_INFO PFX "flatpanel support enabled\n");
1305 	par->FPDither = fpdither;
1306 
1307 	par->CRTCnumber = forceCRTC;
1308 	par->FpScale = (!noscale);
1309 	par->paneltweak = paneltweak;
1310 	par->reverse_i2c = reverse_i2c;
1311 
1312 	/* enable IO and mem if not already done */
1313 	pci_read_config_word(pd, PCI_COMMAND, &cmd);
1314 	cmd |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1315 	pci_write_config_word(pd, PCI_COMMAND, cmd);
1316 
1317 	nvidiafb_fix.mmio_start = pci_resource_start(pd, 0);
1318 	nvidiafb_fix.smem_start = pci_resource_start(pd, 1);
1319 	nvidiafb_fix.mmio_len = pci_resource_len(pd, 0);
1320 
1321 	par->REGS = ioremap(nvidiafb_fix.mmio_start, nvidiafb_fix.mmio_len);
1322 
1323 	if (!par->REGS) {
1324 		printk(KERN_ERR PFX "cannot ioremap MMIO base\n");
1325 		goto err_out_free_base0;
1326 	}
1327 
1328 	par->Chipset = nvidia_get_chipset(info);
1329 	par->Architecture = nvidia_get_arch(info);
1330 
1331 	if (par->Architecture == 0) {
1332 		printk(KERN_ERR PFX "unknown NV_ARCH\n");
1333 		goto err_out_arch;
1334 	}
1335 
1336 	sprintf(nvidiafb_fix.id, "NV%x", (pd->device & 0x0ff0) >> 4);
1337 
1338 	if (NVCommonSetup(info))
1339 		goto err_out_arch;
1340 
1341 	par->FbAddress = nvidiafb_fix.smem_start;
1342 	par->FbMapSize = par->RamAmountKBytes * 1024;
1343 	if (vram && vram * 1024 * 1024 < par->FbMapSize)
1344 		par->FbMapSize = vram * 1024 * 1024;
1345 
1346 	/* Limit amount of vram to 64 MB */
1347 	if (par->FbMapSize > 64 * 1024 * 1024)
1348 		par->FbMapSize = 64 * 1024 * 1024;
1349 
1350 	if(par->Architecture >= NV_ARCH_40)
1351   	        par->FbUsableSize = par->FbMapSize - (560 * 1024);
1352 	else
1353 		par->FbUsableSize = par->FbMapSize - (128 * 1024);
1354 	par->ScratchBufferSize = (par->Architecture < NV_ARCH_10) ? 8 * 1024 :
1355 	    16 * 1024;
1356 	par->ScratchBufferStart = par->FbUsableSize - par->ScratchBufferSize;
1357 	par->CursorStart = par->FbUsableSize + (32 * 1024);
1358 
1359 	info->screen_base = ioremap_wc(nvidiafb_fix.smem_start,
1360 				       par->FbMapSize);
1361 	info->screen_size = par->FbUsableSize;
1362 	nvidiafb_fix.smem_len = par->RamAmountKBytes * 1024;
1363 
1364 	if (!info->screen_base) {
1365 		printk(KERN_ERR PFX "cannot ioremap FB base\n");
1366 		goto err_out_free_base1;
1367 	}
1368 
1369 	par->FbStart = info->screen_base;
1370 
1371 	if (!nomtrr)
1372 		par->wc_cookie = arch_phys_wc_add(nvidiafb_fix.smem_start,
1373 						  par->RamAmountKBytes * 1024);
1374 
1375 	info->fbops = &nvidia_fb_ops;
1376 	info->fix = nvidiafb_fix;
1377 
1378 	if (nvidia_set_fbinfo(info) < 0) {
1379 		printk(KERN_ERR PFX "error setting initial video mode\n");
1380 		goto err_out_iounmap_fb;
1381 	}
1382 
1383 	nvidia_save_vga(par, &par->SavedReg);
1384 
1385 	pci_set_drvdata(pd, info);
1386 
1387 	if (backlight)
1388 		nvidia_bl_init(par);
1389 
1390 	if (register_framebuffer(info) < 0) {
1391 		printk(KERN_ERR PFX "error registering nVidia framebuffer\n");
1392 		goto err_out_iounmap_fb;
1393 	}
1394 
1395 
1396 	printk(KERN_INFO PFX
1397 	       "PCI nVidia %s framebuffer (%dMB @ 0x%lX)\n",
1398 	       info->fix.id,
1399 	       par->FbMapSize / (1024 * 1024), info->fix.smem_start);
1400 
1401 	NVTRACE_LEAVE();
1402 	return 0;
1403 
1404 err_out_iounmap_fb:
1405 	iounmap(info->screen_base);
1406 err_out_free_base1:
1407 	fb_destroy_modedb(info->monspecs.modedb);
1408 	nvidia_delete_i2c_busses(par);
1409 err_out_arch:
1410 	iounmap(par->REGS);
1411  err_out_free_base0:
1412 	pci_release_regions(pd);
1413 err_out_enable:
1414 	kfree(info->pixmap.addr);
1415 err_out_kfree:
1416 	framebuffer_release(info);
1417 err_out:
1418 	return -ENODEV;
1419 }
1420 
1421 static void nvidiafb_remove(struct pci_dev *pd)
1422 {
1423 	struct fb_info *info = pci_get_drvdata(pd);
1424 	struct nvidia_par *par = info->par;
1425 
1426 	NVTRACE_ENTER();
1427 
1428 	unregister_framebuffer(info);
1429 
1430 	nvidia_bl_exit(par);
1431 	arch_phys_wc_del(par->wc_cookie);
1432 	iounmap(info->screen_base);
1433 	fb_destroy_modedb(info->monspecs.modedb);
1434 	nvidia_delete_i2c_busses(par);
1435 	iounmap(par->REGS);
1436 	pci_release_regions(pd);
1437 	kfree(info->pixmap.addr);
1438 	framebuffer_release(info);
1439 	NVTRACE_LEAVE();
1440 }
1441 
1442 /* ------------------------------------------------------------------------- *
1443  *
1444  * initialization
1445  *
1446  * ------------------------------------------------------------------------- */
1447 
1448 #ifndef MODULE
1449 static int nvidiafb_setup(char *options)
1450 {
1451 	char *this_opt;
1452 
1453 	NVTRACE_ENTER();
1454 	if (!options || !*options)
1455 		return 0;
1456 
1457 	while ((this_opt = strsep(&options, ",")) != NULL) {
1458 		if (!strncmp(this_opt, "forceCRTC", 9)) {
1459 			char *p;
1460 
1461 			p = this_opt + 9;
1462 			if (!*p || !*(++p))
1463 				continue;
1464 			forceCRTC = *p - '0';
1465 			if (forceCRTC < 0 || forceCRTC > 1)
1466 				forceCRTC = -1;
1467 		} else if (!strncmp(this_opt, "flatpanel", 9)) {
1468 			flatpanel = 1;
1469 		} else if (!strncmp(this_opt, "hwcur", 5)) {
1470 			hwcur = 1;
1471 		} else if (!strncmp(this_opt, "noaccel", 6)) {
1472 			noaccel = 1;
1473 		} else if (!strncmp(this_opt, "noscale", 7)) {
1474 			noscale = 1;
1475 		} else if (!strncmp(this_opt, "reverse_i2c", 11)) {
1476 			reverse_i2c = 1;
1477 		} else if (!strncmp(this_opt, "paneltweak:", 11)) {
1478 			paneltweak = simple_strtoul(this_opt+11, NULL, 0);
1479 		} else if (!strncmp(this_opt, "vram:", 5)) {
1480 			vram = simple_strtoul(this_opt+5, NULL, 0);
1481 		} else if (!strncmp(this_opt, "backlight:", 10)) {
1482 			backlight = simple_strtoul(this_opt+10, NULL, 0);
1483 		} else if (!strncmp(this_opt, "nomtrr", 6)) {
1484 			nomtrr = true;
1485 		} else if (!strncmp(this_opt, "fpdither:", 9)) {
1486 			fpdither = simple_strtol(this_opt+9, NULL, 0);
1487 		} else if (!strncmp(this_opt, "bpp:", 4)) {
1488 			bpp = simple_strtoul(this_opt+4, NULL, 0);
1489 		} else
1490 			mode_option = this_opt;
1491 	}
1492 	NVTRACE_LEAVE();
1493 	return 0;
1494 }
1495 #endif				/* !MODULE */
1496 
1497 static struct pci_driver nvidiafb_driver = {
1498 	.name = "nvidiafb",
1499 	.id_table = nvidiafb_pci_tbl,
1500 	.probe    = nvidiafb_probe,
1501 	.suspend  = nvidiafb_suspend,
1502 	.resume   = nvidiafb_resume,
1503 	.remove   = nvidiafb_remove,
1504 };
1505 
1506 /* ------------------------------------------------------------------------- *
1507  *
1508  * modularization
1509  *
1510  * ------------------------------------------------------------------------- */
1511 
1512 static int nvidiafb_init(void)
1513 {
1514 #ifndef MODULE
1515 	char *option = NULL;
1516 
1517 	if (fb_get_options("nvidiafb", &option))
1518 		return -ENODEV;
1519 	nvidiafb_setup(option);
1520 #endif
1521 	return pci_register_driver(&nvidiafb_driver);
1522 }
1523 
1524 module_init(nvidiafb_init);
1525 
1526 static void __exit nvidiafb_exit(void)
1527 {
1528 	pci_unregister_driver(&nvidiafb_driver);
1529 }
1530 
1531 module_exit(nvidiafb_exit);
1532 
1533 module_param(flatpanel, int, 0);
1534 MODULE_PARM_DESC(flatpanel,
1535 		 "Enables experimental flat panel support for some chipsets. "
1536 		 "(0=disabled, 1=enabled, -1=autodetect) (default=-1)");
1537 module_param(fpdither, int, 0);
1538 MODULE_PARM_DESC(fpdither,
1539 		 "Enables dithering of flat panel for 6 bits panels. "
1540 		 "(0=disabled, 1=enabled, -1=autodetect) (default=-1)");
1541 module_param(hwcur, int, 0);
1542 MODULE_PARM_DESC(hwcur,
1543 		 "Enables hardware cursor implementation. (0 or 1=enabled) "
1544 		 "(default=0)");
1545 module_param(noaccel, int, 0);
1546 MODULE_PARM_DESC(noaccel,
1547 		 "Disables hardware acceleration. (0 or 1=disable) "
1548 		 "(default=0)");
1549 module_param(noscale, int, 0);
1550 MODULE_PARM_DESC(noscale,
1551 		 "Disables screen scaleing. (0 or 1=disable) "
1552 		 "(default=0, do scaling)");
1553 module_param(paneltweak, int, 0);
1554 MODULE_PARM_DESC(paneltweak,
1555 		 "Tweak display settings for flatpanels. "
1556 		 "(default=0, no tweaks)");
1557 module_param(forceCRTC, int, 0);
1558 MODULE_PARM_DESC(forceCRTC,
1559 		 "Forces usage of a particular CRTC in case autodetection "
1560 		 "fails. (0 or 1) (default=autodetect)");
1561 module_param(vram, int, 0);
1562 MODULE_PARM_DESC(vram,
1563 		 "amount of framebuffer memory to remap in MiB"
1564 		 "(default=0 - remap entire memory)");
1565 module_param(mode_option, charp, 0);
1566 MODULE_PARM_DESC(mode_option, "Specify initial video mode");
1567 module_param(bpp, int, 0);
1568 MODULE_PARM_DESC(bpp, "pixel width in bits"
1569 		 "(default=8)");
1570 module_param(reverse_i2c, int, 0);
1571 MODULE_PARM_DESC(reverse_i2c, "reverse port assignment of the i2c bus");
1572 module_param(nomtrr, bool, false);
1573 MODULE_PARM_DESC(nomtrr, "Disables MTRR support (0 or 1=disabled) "
1574 		 "(default=0)");
1575 
1576 MODULE_AUTHOR("Antonino Daplas");
1577 MODULE_DESCRIPTION("Framebuffer driver for nVidia graphics chipset");
1578 MODULE_LICENSE("GPL");
1579