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MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / drivers / video / matrox / matroxfb_misc.c
blob9948ca2a30460c713b8ac9134af5c3ab5776ea9c
1 /*
2 *
3 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200 and G400
4 *
5 * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
6 *
7 * Portions Copyright (c) 2001 Matrox Graphics Inc.
8 *
9 * Version: 1.65 2002/08/14
10 *
11 * MTRR stuff: 1998 Tom Rini <trini@kernel.crashing.org>
12 *
13 * Contributors: "menion?" <menion@mindless.com>
14 * Betatesting, fixes, ideas
15 *
16 * "Kurt Garloff" <garloff@suse.de>
17 * Betatesting, fixes, ideas, videomodes, videomodes timmings
18 *
19 * "Tom Rini" <trini@kernel.crashing.org>
20 * MTRR stuff, PPC cleanups, betatesting, fixes, ideas
21 *
22 * "Bibek Sahu" <scorpio@dodds.net>
23 * Access device through readb|w|l and write b|w|l
24 * Extensive debugging stuff
25 *
26 * "Daniel Haun" <haund@usa.net>
27 * Testing, hardware cursor fixes
28 *
29 * "Scott Wood" <sawst46+@pitt.edu>
30 * Fixes
31 *
32 * "Gerd Knorr" <kraxel@goldbach.isdn.cs.tu-berlin.de>
33 * Betatesting
34 *
35 * "Kelly French" <targon@hazmat.com>
36 * "Fernando Herrera" <fherrera@eurielec.etsit.upm.es>
37 * Betatesting, bug reporting
38 *
39 * "Pablo Bianucci" <pbian@pccp.com.ar>
40 * Fixes, ideas, betatesting
41 *
42 * "Inaky Perez Gonzalez" <inaky@peloncho.fis.ucm.es>
43 * Fixes, enhandcements, ideas, betatesting
44 *
45 * "Ryuichi Oikawa" <roikawa@rr.iiij4u.or.jp>
46 * PPC betatesting, PPC support, backward compatibility
47 *
48 * "Paul Womar" <Paul@pwomar.demon.co.uk>
49 * "Owen Waller" <O.Waller@ee.qub.ac.uk>
50 * PPC betatesting
51 *
52 * "Thomas Pornin" <pornin@bolet.ens.fr>
53 * Alpha betatesting
54 *
55 * "Pieter van Leuven" <pvl@iae.nl>
56 * "Ulf Jaenicke-Roessler" <ujr@physik.phy.tu-dresden.de>
57 * G100 testing
58 *
59 * "H. Peter Arvin" <hpa@transmeta.com>
60 * Ideas
61 *
62 * "Cort Dougan" <cort@cs.nmt.edu>
63 * CHRP fixes and PReP cleanup
64 *
65 * "Mark Vojkovich" <mvojkovi@ucsd.edu>
66 * G400 support
67 *
68 * "David C. Hansen" <haveblue@us.ibm.com>
69 * Fixes
70 *
71 * "Ian Romanick" <idr@us.ibm.com>
72 * Find PInS data in BIOS on PowerPC systems.
73 *
74 * (following author is not in any relation with this code, but his code
75 * is included in this driver)
76 *
77 * Based on framebuffer driver for VBE 2.0 compliant graphic boards
78 * (c) 1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
79 *
80 * (following author is not in any relation with this code, but his ideas
81 * were used when writing this driver)
82 *
83 * FreeVBE/AF (Matrox), "Shawn Hargreaves" <shawn@talula.demon.co.uk>
84 *
85 */
86
87
88 #include "matroxfb_misc.h"
89 #include <linux/interrupt.h>
90 #include <linux/matroxfb.h>
91
92 void matroxfb_DAC_out(const struct matrox_fb_info *minfo, int reg, int val)
93 {
94 DBG_REG(__func__)
95 mga_outb(M_RAMDAC_BASE+M_X_INDEX, reg);
96 mga_outb(M_RAMDAC_BASE+M_X_DATAREG, val);
97 }
98
99 int matroxfb_DAC_in(const struct matrox_fb_info *minfo, int reg)
100 {
101 DBG_REG(__func__)
102 mga_outb(M_RAMDAC_BASE+M_X_INDEX, reg);
103 return mga_inb(M_RAMDAC_BASE+M_X_DATAREG);
104 }
105
106 void matroxfb_var2my(struct fb_var_screeninfo* var, struct my_timming* mt) {
107 unsigned int pixclock = var->pixclock;
108
109 DBG(__func__)
110
111 if (!pixclock) pixclock = 10000; /* 10ns = 100MHz */
112 mt->pixclock = 1000000000 / pixclock;
113 if (mt->pixclock < 1) mt->pixclock = 1;
114 mt->mnp = -1;
115 mt->dblscan = var->vmode & FB_VMODE_DOUBLE;
116 mt->interlaced = var->vmode & FB_VMODE_INTERLACED;
117 mt->HDisplay = var->xres;
118 mt->HSyncStart = mt->HDisplay + var->right_margin;
119 mt->HSyncEnd = mt->HSyncStart + var->hsync_len;
120 mt->HTotal = mt->HSyncEnd + var->left_margin;
121 mt->VDisplay = var->yres;
122 mt->VSyncStart = mt->VDisplay + var->lower_margin;
123 mt->VSyncEnd = mt->VSyncStart + var->vsync_len;
124 mt->VTotal = mt->VSyncEnd + var->upper_margin;
125 mt->sync = var->sync;
126 }
127
128 int matroxfb_PLL_calcclock(const struct matrox_pll_features* pll, unsigned int freq, unsigned int fmax,
129 unsigned int* in, unsigned int* feed, unsigned int* post) {
130 unsigned int bestdiff = ~0;
131 unsigned int bestvco = 0;
132 unsigned int fxtal = pll->ref_freq;
133 unsigned int fwant;
134 unsigned int p;
135
136 DBG(__func__)
137
138 fwant = freq;
139
140 #ifdef DEBUG
141 printk(KERN_ERR "post_shift_max: %d\n", pll->post_shift_max);
142 printk(KERN_ERR "ref_freq: %d\n", pll->ref_freq);
143 printk(KERN_ERR "freq: %d\n", freq);
144 printk(KERN_ERR "vco_freq_min: %d\n", pll->vco_freq_min);
145 printk(KERN_ERR "in_div_min: %d\n", pll->in_div_min);
146 printk(KERN_ERR "in_div_max: %d\n", pll->in_div_max);
147 printk(KERN_ERR "feed_div_min: %d\n", pll->feed_div_min);
148 printk(KERN_ERR "feed_div_max: %d\n", pll->feed_div_max);
149 printk(KERN_ERR "fmax: %d\n", fmax);
150 #endif
151 for (p = 1; p <= pll->post_shift_max; p++) {
152 if (fwant * 2 > fmax)
153 break;
154 fwant *= 2;
155 }
156 if (fwant < pll->vco_freq_min) fwant = pll->vco_freq_min;
157 if (fwant > fmax) fwant = fmax;
158 for (; p-- > 0; fwant >>= 1, bestdiff >>= 1) {
159 unsigned int m;
160
161 if (fwant < pll->vco_freq_min) break;
162 for (m = pll->in_div_min; m <= pll->in_div_max; m++) {
163 unsigned int diff, fvco;
164 unsigned int n;
165
166 n = (fwant * (m + 1) + (fxtal >> 1)) / fxtal - 1;
167 if (n > pll->feed_div_max)
168 break;
169 if (n < pll->feed_div_min)
170 n = pll->feed_div_min;
171 fvco = (fxtal * (n + 1)) / (m + 1);
172 if (fvco < fwant)
173 diff = fwant - fvco;
174 else
175 diff = fvco - fwant;
176 if (diff < bestdiff) {
177 bestdiff = diff;
178 *post = p;
179 *in = m;
180 *feed = n;
181 bestvco = fvco;
182 }
183 }
184 }
185 dprintk(KERN_ERR "clk: %02X %02X %02X %d %d %d\n", *in, *feed, *post, fxtal, bestvco, fwant);
186 return bestvco;
187 }
188
189 int matroxfb_vgaHWinit(struct matrox_fb_info *minfo, struct my_timming *m)
190 {
191 unsigned int hd, hs, he, hbe, ht;
192 unsigned int vd, vs, ve, vt, lc;
193 unsigned int wd;
194 unsigned int divider;
195 int i;
196 struct matrox_hw_state * const hw = &minfo->hw;
197
198 DBG(__func__)
199
200 hw->SEQ[0] = 0x00;
201 hw->SEQ[1] = 0x01; /* or 0x09 */
202 hw->SEQ[2] = 0x0F; /* bitplanes */
203 hw->SEQ[3] = 0x00;
204 hw->SEQ[4] = 0x0E;
205 /* CRTC 0..7, 9, 16..19, 21, 22 are reprogrammed by Matrox Millennium code... Hope that by MGA1064 too */
206 if (m->dblscan) {
207 m->VTotal <<= 1;
208 m->VDisplay <<= 1;
209 m->VSyncStart <<= 1;
210 m->VSyncEnd <<= 1;
211 }
212 if (m->interlaced) {
213 m->VTotal >>= 1;
214 m->VDisplay >>= 1;
215 m->VSyncStart >>= 1;
216 m->VSyncEnd >>= 1;
217 }
218
219 /* GCTL is ignored when not using 0xA0000 aperture */
220 hw->GCTL[0] = 0x00;
221 hw->GCTL[1] = 0x00;
222 hw->GCTL[2] = 0x00;
223 hw->GCTL[3] = 0x00;
224 hw->GCTL[4] = 0x00;
225 hw->GCTL[5] = 0x40;
226 hw->GCTL[6] = 0x05;
227 hw->GCTL[7] = 0x0F;
228 hw->GCTL[8] = 0xFF;
229
230 /* Whole ATTR is ignored in PowerGraphics mode */
231 for (i = 0; i < 16; i++)
232 hw->ATTR[i] = i;
233 hw->ATTR[16] = 0x41;
234 hw->ATTR[17] = 0xFF;
235 hw->ATTR[18] = 0x0F;
236 hw->ATTR[19] = 0x00;
237 hw->ATTR[20] = 0x00;
238
239 hd = m->HDisplay >> 3;
240 hs = m->HSyncStart >> 3;
241 he = m->HSyncEnd >> 3;
242 ht = m->HTotal >> 3;
243 /* standard timmings are in 8pixels, but for interleaved we cannot */
244 /* do it for 4bpp (because of (4bpp >> 1(interleaved))/4 == 0) */
245 /* using 16 or more pixels per unit can save us */
246 divider = minfo->curr.final_bppShift;
247 while (divider & 3) {
248 hd >>= 1;
249 hs >>= 1;
250 he >>= 1;
251 ht >>= 1;
252 divider <<= 1;
253 }
254 divider = divider / 4;
255 /* divider can be from 1 to 8 */
256 while (divider > 8) {
257 hd <<= 1;
258 hs <<= 1;
259 he <<= 1;
260 ht <<= 1;
261 divider >>= 1;
262 }
263 hd = hd - 1;
264 hs = hs - 1;
265 he = he - 1;
266 ht = ht - 1;
267 vd = m->VDisplay - 1;
268 vs = m->VSyncStart - 1;
269 ve = m->VSyncEnd - 1;
270 vt = m->VTotal - 2;
271 lc = vd;
272 /* G200 cannot work with (ht & 7) == 6 */
273 if (((ht & 0x07) == 0x06) || ((ht & 0x0F) == 0x04))
274 ht++;
275 hbe = ht;
276 wd = minfo->fbcon.var.xres_virtual * minfo->curr.final_bppShift / 64;
277
278 hw->CRTCEXT[0] = 0;
279 hw->CRTCEXT[5] = 0;
280 if (m->interlaced) {
281 hw->CRTCEXT[0] = 0x80;
282 hw->CRTCEXT[5] = (hs + he - ht) >> 1;
283 if (!m->dblscan)
284 wd <<= 1;
285 vt &= ~1;
286 }
287 hw->CRTCEXT[0] |= (wd & 0x300) >> 4;
288 hw->CRTCEXT[1] = (((ht - 4) & 0x100) >> 8) |
289 ((hd & 0x100) >> 7) | /* blanking */
290 ((hs & 0x100) >> 6) | /* sync start */
291 (hbe & 0x040); /* end hor. blanking */
292 /* FIXME: Enable vidrst only on G400, and only if TV-out is used */
293 if (minfo->outputs[1].src == MATROXFB_SRC_CRTC1)
294 hw->CRTCEXT[1] |= 0x88; /* enable horizontal and vertical vidrst */
295 hw->CRTCEXT[2] = ((vt & 0xC00) >> 10) |
296 ((vd & 0x400) >> 8) | /* disp end */
297 ((vd & 0xC00) >> 7) | /* vblanking start */
298 ((vs & 0xC00) >> 5) |
299 ((lc & 0x400) >> 3);
300 hw->CRTCEXT[3] = (divider - 1) | 0x80;
301 hw->CRTCEXT[4] = 0;
302
303 hw->CRTC[0] = ht-4;
304 hw->CRTC[1] = hd;
305 hw->CRTC[2] = hd;
306 hw->CRTC[3] = (hbe & 0x1F) | 0x80;
307 hw->CRTC[4] = hs;
308 hw->CRTC[5] = ((hbe & 0x20) << 2) | (he & 0x1F);
309 hw->CRTC[6] = vt & 0xFF;
310 hw->CRTC[7] = ((vt & 0x100) >> 8) |
311 ((vd & 0x100) >> 7) |
312 ((vs & 0x100) >> 6) |
313 ((vd & 0x100) >> 5) |
314 ((lc & 0x100) >> 4) |
315 ((vt & 0x200) >> 4) |
316 ((vd & 0x200) >> 3) |
317 ((vs & 0x200) >> 2);
318 hw->CRTC[8] = 0x00;
319 hw->CRTC[9] = ((vd & 0x200) >> 4) |
320 ((lc & 0x200) >> 3);
321 if (m->dblscan && !m->interlaced)
322 hw->CRTC[9] |= 0x80;
323 for (i = 10; i < 16; i++)
324 hw->CRTC[i] = 0x00;
325 hw->CRTC[16] = vs /* & 0xFF */;
326 hw->CRTC[17] = (ve & 0x0F) | 0x20;
327 hw->CRTC[18] = vd /* & 0xFF */;
328 hw->CRTC[19] = wd /* & 0xFF */;
329 hw->CRTC[20] = 0x00;
330 hw->CRTC[21] = vd /* & 0xFF */;
331 hw->CRTC[22] = (vt + 1) /* & 0xFF */;
332 hw->CRTC[23] = 0xC3;
333 hw->CRTC[24] = lc;
334 return 0;
335 };
336
337 void matroxfb_vgaHWrestore(struct matrox_fb_info *minfo)
338 {
339 int i;
340 struct matrox_hw_state * const hw = &minfo->hw;
341 CRITFLAGS
342
343 DBG(__func__)
344
345 dprintk(KERN_INFO "MiscOutReg: %02X\n", hw->MiscOutReg);
346 dprintk(KERN_INFO "SEQ regs: ");
347 for (i = 0; i < 5; i++)
348 dprintk("%02X:", hw->SEQ[i]);
349 dprintk("\n");
350 dprintk(KERN_INFO "GDC regs: ");
351 for (i = 0; i < 9; i++)
352 dprintk("%02X:", hw->GCTL[i]);
353 dprintk("\n");
354 dprintk(KERN_INFO "CRTC regs: ");
355 for (i = 0; i < 25; i++)
356 dprintk("%02X:", hw->CRTC[i]);
357 dprintk("\n");
358 dprintk(KERN_INFO "ATTR regs: ");
359 for (i = 0; i < 21; i++)
360 dprintk("%02X:", hw->ATTR[i]);
361 dprintk("\n");
362
363 CRITBEGIN
364
365 mga_inb(M_ATTR_RESET);
366 mga_outb(M_ATTR_INDEX, 0);
367 mga_outb(M_MISC_REG, hw->MiscOutReg);
368 for (i = 1; i < 5; i++)
369 mga_setr(M_SEQ_INDEX, i, hw->SEQ[i]);
370 mga_setr(M_CRTC_INDEX, 17, hw->CRTC[17] & 0x7F);
371 for (i = 0; i < 25; i++)
372 mga_setr(M_CRTC_INDEX, i, hw->CRTC[i]);
373 for (i = 0; i < 9; i++)
374 mga_setr(M_GRAPHICS_INDEX, i, hw->GCTL[i]);
375 for (i = 0; i < 21; i++) {
376 mga_inb(M_ATTR_RESET);
377 mga_outb(M_ATTR_INDEX, i);
378 mga_outb(M_ATTR_INDEX, hw->ATTR[i]);
379 }
380 mga_outb(M_PALETTE_MASK, 0xFF);
381 mga_outb(M_DAC_REG, 0x00);
382 for (i = 0; i < 768; i++)
383 mga_outb(M_DAC_VAL, hw->DACpal[i]);
384 mga_inb(M_ATTR_RESET);
385 mga_outb(M_ATTR_INDEX, 0x20);
386
387 CRITEND
388 }
389
390 static void get_pins(unsigned char __iomem* pins, struct matrox_bios* bd) {
391 unsigned int b0 = readb(pins);
392
393 if (b0 == 0x2E && readb(pins+1) == 0x41) {
394 unsigned int pins_len = readb(pins+2);
395 unsigned int i;
396 unsigned char cksum;
397 unsigned char* dst = bd->pins;
398
399 if (pins_len < 3 || pins_len > 128) {
400 return;
401 }
402 *dst++ = 0x2E;
403 *dst++ = 0x41;
404 *dst++ = pins_len;
405 cksum = 0x2E + 0x41 + pins_len;
406 for (i = 3; i < pins_len; i++) {
407 cksum += *dst++ = readb(pins+i);
408 }
409 if (cksum) {
410 return;
411 }
412 bd->pins_len = pins_len;
413 } else if (b0 == 0x40 && readb(pins+1) == 0x00) {
414 unsigned int i;
415 unsigned char* dst = bd->pins;
416
417 *dst++ = 0x40;
418 *dst++ = 0;
419 for (i = 2; i < 0x40; i++) {
420 *dst++ = readb(pins+i);
421 }
422 bd->pins_len = 0x40;
423 }
424 }
425
426 static void get_bios_version(unsigned char __iomem * vbios, struct matrox_bios* bd) {
427 unsigned int pcir_offset;
428
429 pcir_offset = readb(vbios + 24) | (readb(vbios + 25) << 8);
430 if (pcir_offset >= 26 && pcir_offset < 0xFFE0 &&
431 readb(vbios + pcir_offset ) == 'P' &&
432 readb(vbios + pcir_offset + 1) == 'C' &&
433 readb(vbios + pcir_offset + 2) == 'I' &&
434 readb(vbios + pcir_offset + 3) == 'R') {
435 unsigned char h;
436
437 h = readb(vbios + pcir_offset + 0x12);
438 bd->version.vMaj = (h >> 4) & 0xF;
439 bd->version.vMin = h & 0xF;
440 bd->version.vRev = readb(vbios + pcir_offset + 0x13);
441 } else {
442 unsigned char h;
443
444 h = readb(vbios + 5);
445 bd->version.vMaj = (h >> 4) & 0xF;
446 bd->version.vMin = h & 0xF;
447 bd->version.vRev = 0;
448 }
449 }
450
451 static void get_bios_output(unsigned char __iomem* vbios, struct matrox_bios* bd) {
452 unsigned char b;
453
454 b = readb(vbios + 0x7FF1);
455 if (b == 0xFF) {
456 b = 0;
457 }
458 bd->output.state = b;
459 }
460
461 static void get_bios_tvout(unsigned char __iomem* vbios, struct matrox_bios* bd) {
462 unsigned int i;
463
464 /* Check for 'IBM .*(V....TVO' string - it means TVO BIOS */
465 bd->output.tvout = 0;
466 if (readb(vbios + 0x1D) != 'I' ||
467 readb(vbios + 0x1E) != 'B' ||
468 readb(vbios + 0x1F) != 'M' ||
469 readb(vbios + 0x20) != ' ') {
470 return;
471 }
472 for (i = 0x2D; i < 0x2D + 128; i++) {
473 unsigned char b = readb(vbios + i);
474
475 if (b == '(' && readb(vbios + i + 1) == 'V') {
476 if (readb(vbios + i + 6) == 'T' &&
477 readb(vbios + i + 7) == 'V' &&
478 readb(vbios + i + 8) == 'O') {
479 bd->output.tvout = 1;
480 }
481 return;
482 }
483 if (b == 0)
484 break;
485 }
486 }
487
488 static void parse_bios(unsigned char __iomem* vbios, struct matrox_bios* bd) {
489 unsigned int pins_offset;
490
491 if (readb(vbios) != 0x55 || readb(vbios + 1) != 0xAA) {
492 return;
493 }
494 bd->bios_valid = 1;
495 get_bios_version(vbios, bd);
496 get_bios_output(vbios, bd);
497 get_bios_tvout(vbios, bd);
498 #if defined(__powerpc__)
499 /* On PowerPC cards, the PInS offset isn't stored at the end of the
500 * BIOS image. Instead, you must search the entire BIOS image for
501 * the magic PInS signature.
502 *
503 * This actually applies to all OpenFirmware base cards. Since these
504 * cards could be put in a MIPS or SPARC system, should the condition
505 * be something different?
506 */
507 for ( pins_offset = 0 ; pins_offset <= 0xFF80 ; pins_offset++ ) {
508 unsigned char header[3];
509
510 header[0] = readb(vbios + pins_offset);
511 header[1] = readb(vbios + pins_offset + 1);
512 header[2] = readb(vbios + pins_offset + 2);
513 if ( (header[0] == 0x2E) && (header[1] == 0x41)
514 && ((header[2] == 0x40) || (header[2] == 0x80)) ) {
515 printk(KERN_INFO "PInS data found at offset %u\n",
516 pins_offset);
517 get_pins(vbios + pins_offset, bd);
518 break;
519 }
520 }
521 #else
522 pins_offset = readb(vbios + 0x7FFC) | (readb(vbios + 0x7FFD) << 8);
523 if (pins_offset <= 0xFF80) {
524 get_pins(vbios + pins_offset, bd);
525 }
526 #endif
527 }
528
529 static int parse_pins1(struct matrox_fb_info *minfo,
530 const struct matrox_bios *bd)
531 {
532 unsigned int maxdac;
533
534 switch (bd->pins[22]) {
535 case 0: maxdac = 175000; break;
536 case 1: maxdac = 220000; break;
537 default: maxdac = 240000; break;
538 }
539 if (get_unaligned_le16(bd->pins + 24)) {
540 maxdac = get_unaligned_le16(bd->pins + 24) * 10;
541 }
542 minfo->limits.pixel.vcomax = maxdac;
543 minfo->values.pll.system = get_unaligned_le16(bd->pins + 28) ?
544 get_unaligned_le16(bd->pins + 28) * 10 : 50000;
545 /* ignore 4MB, 8MB, module clocks */
546 minfo->features.pll.ref_freq = 14318;
547 minfo->values.reg.mctlwtst = 0x00030101;
548 return 0;
549 }
550
551 static void default_pins1(struct matrox_fb_info *minfo)
552 {
553 /* Millennium */
554 minfo->limits.pixel.vcomax = 220000;
555 minfo->values.pll.system = 50000;
556 minfo->features.pll.ref_freq = 14318;
557 minfo->values.reg.mctlwtst = 0x00030101;
558 }
559
560 static int parse_pins2(struct matrox_fb_info *minfo,
561 const struct matrox_bios *bd)
562 {
563 minfo->limits.pixel.vcomax =
564 minfo->limits.system.vcomax = (bd->pins[41] == 0xFF) ? 230000 : ((bd->pins[41] + 100) * 1000);
565 minfo->values.reg.mctlwtst = ((bd->pins[51] & 0x01) ? 0x00000001 : 0) |
566 ((bd->pins[51] & 0x02) ? 0x00000100 : 0) |
567 ((bd->pins[51] & 0x04) ? 0x00010000 : 0) |
568 ((bd->pins[51] & 0x08) ? 0x00020000 : 0);
569 minfo->values.pll.system = (bd->pins[43] == 0xFF) ? 50000 : ((bd->pins[43] + 100) * 1000);
570 minfo->features.pll.ref_freq = 14318;
571 return 0;
572 }
573
574 static void default_pins2(struct matrox_fb_info *minfo)
575 {
576 /* Millennium II, Mystique */
577 minfo->limits.pixel.vcomax =
578 minfo->limits.system.vcomax = 230000;
579 minfo->values.reg.mctlwtst = 0x00030101;
580 minfo->values.pll.system = 50000;
581 minfo->features.pll.ref_freq = 14318;
582 }
583
584 static int parse_pins3(struct matrox_fb_info *minfo,
585 const struct matrox_bios *bd)
586 {
587 minfo->limits.pixel.vcomax =
588 minfo->limits.system.vcomax = (bd->pins[36] == 0xFF) ? 230000 : ((bd->pins[36] + 100) * 1000);
589 minfo->values.reg.mctlwtst = get_unaligned_le32(bd->pins + 48) == 0xFFFFFFFF ?
590 0x01250A21 : get_unaligned_le32(bd->pins + 48);
591 /* memory config */
592 minfo->values.reg.memrdbk = ((bd->pins[57] << 21) & 0x1E000000) |
593 ((bd->pins[57] << 22) & 0x00C00000) |
594 ((bd->pins[56] << 1) & 0x000001E0) |
595 ( bd->pins[56] & 0x0000000F);
596 minfo->values.reg.opt = (bd->pins[54] & 7) << 10;
597 minfo->values.reg.opt2 = bd->pins[58] << 12;
598 minfo->features.pll.ref_freq = (bd->pins[52] & 0x20) ? 14318 : 27000;
599 return 0;
600 }
601
602 static void default_pins3(struct matrox_fb_info *minfo)
603 {
604 /* G100, G200 */
605 minfo->limits.pixel.vcomax =
606 minfo->limits.system.vcomax = 230000;
607 minfo->values.reg.mctlwtst = 0x01250A21;
608 minfo->values.reg.memrdbk = 0x00000000;
609 minfo->values.reg.opt = 0x00000C00;
610 minfo->values.reg.opt2 = 0x00000000;
611 minfo->features.pll.ref_freq = 27000;
612 }
613
614 static int parse_pins4(struct matrox_fb_info *minfo,
615 const struct matrox_bios *bd)
616 {
617 minfo->limits.pixel.vcomax = (bd->pins[ 39] == 0xFF) ? 230000 : bd->pins[ 39] * 4000;
618 minfo->limits.system.vcomax = (bd->pins[ 38] == 0xFF) ? minfo->limits.pixel.vcomax : bd->pins[ 38] * 4000;
619 minfo->values.reg.mctlwtst = get_unaligned_le32(bd->pins + 71);
620 minfo->values.reg.memrdbk = ((bd->pins[87] << 21) & 0x1E000000) |
621 ((bd->pins[87] << 22) & 0x00C00000) |
622 ((bd->pins[86] << 1) & 0x000001E0) |
623 ( bd->pins[86] & 0x0000000F);
624 minfo->values.reg.opt = ((bd->pins[53] << 15) & 0x00400000) |
625 ((bd->pins[53] << 22) & 0x10000000) |
626 ((bd->pins[53] << 7) & 0x00001C00);
627 minfo->values.reg.opt3 = get_unaligned_le32(bd->pins + 67);
628 minfo->values.pll.system = (bd->pins[ 65] == 0xFF) ? 200000 : bd->pins[ 65] * 4000;
629 minfo->features.pll.ref_freq = (bd->pins[ 92] & 0x01) ? 14318 : 27000;
630 return 0;
631 }
632
633 static void default_pins4(struct matrox_fb_info *minfo)
634 {
635 /* G400 */
636 minfo->limits.pixel.vcomax =
637 minfo->limits.system.vcomax = 252000;
638 minfo->values.reg.mctlwtst = 0x04A450A1;
639 minfo->values.reg.memrdbk = 0x000000E7;
640 minfo->values.reg.opt = 0x10000400;
641 minfo->values.reg.opt3 = 0x0190A419;
642 minfo->values.pll.system = 200000;
643 minfo->features.pll.ref_freq = 27000;
644 }
645
646 static int parse_pins5(struct matrox_fb_info *minfo,
647 const struct matrox_bios *bd)
648 {
649 unsigned int mult;
650
651 mult = bd->pins[4]?8000:6000;
652
653 minfo->limits.pixel.vcomax = (bd->pins[ 38] == 0xFF) ? 600000 : bd->pins[ 38] * mult;
654 minfo->limits.system.vcomax = (bd->pins[ 36] == 0xFF) ? minfo->limits.pixel.vcomax : bd->pins[ 36] * mult;
655 minfo->limits.video.vcomax = (bd->pins[ 37] == 0xFF) ? minfo->limits.system.vcomax : bd->pins[ 37] * mult;
656 minfo->limits.pixel.vcomin = (bd->pins[123] == 0xFF) ? 256000 : bd->pins[123] * mult;
657 minfo->limits.system.vcomin = (bd->pins[121] == 0xFF) ? minfo->limits.pixel.vcomin : bd->pins[121] * mult;
658 minfo->limits.video.vcomin = (bd->pins[122] == 0xFF) ? minfo->limits.system.vcomin : bd->pins[122] * mult;
659 minfo->values.pll.system =
660 minfo->values.pll.video = (bd->pins[ 92] == 0xFF) ? 284000 : bd->pins[ 92] * 4000;
661 minfo->values.reg.opt = get_unaligned_le32(bd->pins + 48);
662 minfo->values.reg.opt2 = get_unaligned_le32(bd->pins + 52);
663 minfo->values.reg.opt3 = get_unaligned_le32(bd->pins + 94);
664 minfo->values.reg.mctlwtst = get_unaligned_le32(bd->pins + 98);
665 minfo->values.reg.memmisc = get_unaligned_le32(bd->pins + 102);
666 minfo->values.reg.memrdbk = get_unaligned_le32(bd->pins + 106);
667 minfo->features.pll.ref_freq = (bd->pins[110] & 0x01) ? 14318 : 27000;
668 minfo->values.memory.ddr = (bd->pins[114] & 0x60) == 0x20;
669 minfo->values.memory.dll = (bd->pins[115] & 0x02) != 0;
670 minfo->values.memory.emrswen = (bd->pins[115] & 0x01) != 0;
671 minfo->values.reg.maccess = minfo->values.memory.emrswen ? 0x00004000 : 0x00000000;
672 if (bd->pins[115] & 4) {
673 minfo->values.reg.mctlwtst_core = minfo->values.reg.mctlwtst;
674 } else {
675 u_int32_t wtst_xlat[] = { 0, 1, 5, 6, 7, 5, 2, 3 };
676 minfo->values.reg.mctlwtst_core = (minfo->values.reg.mctlwtst & ~7) |
677 wtst_xlat[minfo->values.reg.mctlwtst & 7];
678 }
679 minfo->max_pixel_clock_panellink = bd->pins[47] * 4000;
680 return 0;
681 }
682
683 static void default_pins5(struct matrox_fb_info *minfo)
684 {
685 /* Mine 16MB G450 with SDRAM DDR */
686 minfo->limits.pixel.vcomax =
687 minfo->limits.system.vcomax =
688 minfo->limits.video.vcomax = 600000;
689 minfo->limits.pixel.vcomin =
690 minfo->limits.system.vcomin =
691 minfo->limits.video.vcomin = 256000;
692 minfo->values.pll.system =
693 minfo->values.pll.video = 284000;
694 minfo->values.reg.opt = 0x404A1160;
695 minfo->values.reg.opt2 = 0x0000AC00;
696 minfo->values.reg.opt3 = 0x0090A409;
697 minfo->values.reg.mctlwtst_core =
698 minfo->values.reg.mctlwtst = 0x0C81462B;
699 minfo->values.reg.memmisc = 0x80000004;
700 minfo->values.reg.memrdbk = 0x01001103;
701 minfo->features.pll.ref_freq = 27000;
702 minfo->values.memory.ddr = 1;
703 minfo->values.memory.dll = 1;
704 minfo->values.memory.emrswen = 1;
705 minfo->values.reg.maccess = 0x00004000;
706 }
707
708 static int matroxfb_set_limits(struct matrox_fb_info *minfo,
709 const struct matrox_bios *bd)
710 {
711 unsigned int pins_version;
712 static const unsigned int pinslen[] = { 64, 64, 64, 128, 128 };
713
714 switch (minfo->chip) {
715 case MGA_2064: default_pins1(minfo); break;
716 case MGA_2164:
717 case MGA_1064:
718 case MGA_1164: default_pins2(minfo); break;
719 case MGA_G100:
720 case MGA_G200: default_pins3(minfo); break;
721 case MGA_G400: default_pins4(minfo); break;
722 case MGA_G450:
723 case MGA_G550: default_pins5(minfo); break;
724 }
725 if (!bd->bios_valid) {
726 printk(KERN_INFO "matroxfb: Your Matrox device does not have BIOS\n");
727 return -1;
728 }
729 if (bd->pins_len < 64) {
730 printk(KERN_INFO "matroxfb: BIOS on your Matrox device does not contain powerup info\n");
731 return -1;
732 }
733 if (bd->pins[0] == 0x2E && bd->pins[1] == 0x41) {
734 pins_version = bd->pins[5];
735 if (pins_version < 2 || pins_version > 5) {
736 printk(KERN_INFO "matroxfb: Unknown version (%u) of powerup info\n", pins_version);
737 return -1;
738 }
739 } else {
740 pins_version = 1;
741 }
742 if (bd->pins_len != pinslen[pins_version - 1]) {
743 printk(KERN_INFO "matroxfb: Invalid powerup info\n");
744 return -1;
745 }
746 switch (pins_version) {
747 case 1:
748 return parse_pins1(minfo, bd);
749 case 2:
750 return parse_pins2(minfo, bd);
751 case 3:
752 return parse_pins3(minfo, bd);
753 case 4:
754 return parse_pins4(minfo, bd);
755 case 5:
756 return parse_pins5(minfo, bd);
757 default:
758 printk(KERN_DEBUG "matroxfb: Powerup info version %u is not yet supported\n", pins_version);
759 return -1;
760 }
761 }
762
763 void matroxfb_read_pins(struct matrox_fb_info *minfo)
764 {
765 u32 opt;
766 u32 biosbase;
767 u32 fbbase;
768 struct pci_dev *pdev = minfo->pcidev;
769
770 memset(&minfo->bios, 0, sizeof(minfo->bios));
771 pci_read_config_dword(pdev, PCI_OPTION_REG, &opt);
772 pci_write_config_dword(pdev, PCI_OPTION_REG, opt | PCI_OPTION_ENABLE_ROM);
773 pci_read_config_dword(pdev, PCI_ROM_ADDRESS, &biosbase);
774 pci_read_config_dword(pdev, minfo->devflags.fbResource, &fbbase);
775 pci_write_config_dword(pdev, PCI_ROM_ADDRESS, (fbbase & PCI_ROM_ADDRESS_MASK) | PCI_ROM_ADDRESS_ENABLE);
776 parse_bios(vaddr_va(minfo->video.vbase), &minfo->bios);
777 pci_write_config_dword(pdev, PCI_ROM_ADDRESS, biosbase);
778 pci_write_config_dword(pdev, PCI_OPTION_REG, opt);
779 #ifdef CONFIG_X86
780 if (!minfo->bios.bios_valid) {
781 unsigned char __iomem* b;
782
783 b = ioremap(0x000C0000, 65536);
784 if (!b) {
785 printk(KERN_INFO "matroxfb: Unable to map legacy BIOS\n");
786 } else {
787 unsigned int ven = readb(b+0x64+0) | (readb(b+0x64+1) << 8);
788 unsigned int dev = readb(b+0x64+2) | (readb(b+0x64+3) << 8);
789
790 if (ven != pdev->vendor || dev != pdev->device) {
791 printk(KERN_INFO "matroxfb: Legacy BIOS is for %04X:%04X, while this device is %04X:%04X\n",
792 ven, dev, pdev->vendor, pdev->device);
793 } else {
794 parse_bios(b, &minfo->bios);
795 }
796 iounmap(b);
797 }
798 }
799 #endif
800 matroxfb_set_limits(minfo, &minfo->bios);
801 printk(KERN_INFO "PInS memtype = %u\n",
802 (minfo->values.reg.opt & 0x1C00) >> 10);
803 }
804
805 EXPORT_SYMBOL(matroxfb_DAC_in);
806 EXPORT_SYMBOL(matroxfb_DAC_out);
807 EXPORT_SYMBOL(matroxfb_var2my);
808 EXPORT_SYMBOL(matroxfb_PLL_calcclock);
809 EXPORT_SYMBOL(matroxfb_vgaHWinit); /* DAC1064, Ti3026 */
810 EXPORT_SYMBOL(matroxfb_vgaHWrestore); /* DAC1064, Ti3026 */
811 EXPORT_SYMBOL(matroxfb_read_pins);
812
813 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
814 MODULE_DESCRIPTION("Miscellaneous support for Matrox video cards");
815 MODULE_LICENSE("GPL");
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