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14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/errno.h>
17#include <linux/string.h>
18#include <linux/mm.h>
19#include <linux/slab.h>
20#include <linux/delay.h>
21#include <linux/fb.h>
22#include <linux/init.h>
23#include <linux/pci.h>
24#include <linux/pci_ids.h>
25#include <linux/i2c.h>
26#include <linux/i2c-algo-bit.h>
27#include <linux/console.h>
28#include <video/vga.h>
29
30#ifdef CONFIG_MTRR
31#include <asm/mtrr.h>
32#endif
33
34#include "i740_reg.h"
35
36static char *mode_option;
37
38#ifdef CONFIG_MTRR
39static int mtrr = 1;
40#endif
41
42struct i740fb_par {
43 unsigned char __iomem *regs;
44 bool has_sgram;
45#ifdef CONFIG_MTRR
46 int mtrr_reg;
47#endif
48 bool ddc_registered;
49 struct i2c_adapter ddc_adapter;
50 struct i2c_algo_bit_data ddc_algo;
51 u32 pseudo_palette[16];
52 struct mutex open_lock;
53 unsigned int ref_count;
54
55 u8 crtc[VGA_CRT_C];
56 u8 atc[VGA_ATT_C];
57 u8 gdc[VGA_GFX_C];
58 u8 seq[VGA_SEQ_C];
59 u8 misc;
60 u8 vss;
61
62
63 u8 display_cntl;
64 u8 pixelpipe_cfg0;
65 u8 pixelpipe_cfg1;
66 u8 pixelpipe_cfg2;
67 u8 video_clk2_m;
68 u8 video_clk2_n;
69 u8 video_clk2_mn_msbs;
70 u8 video_clk2_div_sel;
71 u8 pll_cntl;
72 u8 address_mapping;
73 u8 io_cntl;
74 u8 bitblt_cntl;
75 u8 ext_vert_total;
76 u8 ext_vert_disp_end;
77 u8 ext_vert_sync_start;
78 u8 ext_vert_blank_start;
79 u8 ext_horiz_total;
80 u8 ext_horiz_blank;
81 u8 ext_offset;
82 u8 interlace_cntl;
83 u32 lmi_fifo_watermark;
84 u8 ext_start_addr;
85 u8 ext_start_addr_hi;
86};
87
88#define DACSPEED8 203
89#define DACSPEED16 163
90#define DACSPEED24_SG 136
91#define DACSPEED24_SD 128
92#define DACSPEED32 86
93
94static struct fb_fix_screeninfo i740fb_fix = {
95 .id = "i740fb",
96 .type = FB_TYPE_PACKED_PIXELS,
97 .visual = FB_VISUAL_TRUECOLOR,
98 .xpanstep = 8,
99 .ypanstep = 1,
100 .accel = FB_ACCEL_NONE,
101};
102
103static inline void i740outb(struct i740fb_par *par, u16 port, u8 val)
104{
105 vga_mm_w(par->regs, port, val);
106}
107static inline u8 i740inb(struct i740fb_par *par, u16 port)
108{
109 return vga_mm_r(par->regs, port);
110}
111static inline void i740outreg(struct i740fb_par *par, u16 port, u8 reg, u8 val)
112{
113 vga_mm_w_fast(par->regs, port, reg, val);
114}
115static inline u8 i740inreg(struct i740fb_par *par, u16 port, u8 reg)
116{
117 vga_mm_w(par->regs, port, reg);
118 return vga_mm_r(par->regs, port+1);
119}
120static inline void i740outreg_mask(struct i740fb_par *par, u16 port, u8 reg,
121 u8 val, u8 mask)
122{
123 vga_mm_w_fast(par->regs, port, reg, (val & mask)
124 | (i740inreg(par, port, reg) & ~mask));
125}
126
127#define REG_DDC_DRIVE 0x62
128#define REG_DDC_STATE 0x63
129#define DDC_SCL (1 << 3)
130#define DDC_SDA (1 << 2)
131
132static void i740fb_ddc_setscl(void *data, int val)
133{
134 struct i740fb_par *par = data;
135
136 i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SCL, DDC_SCL);
137 i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SCL : 0, DDC_SCL);
138}
139
140static void i740fb_ddc_setsda(void *data, int val)
141{
142 struct i740fb_par *par = data;
143
144 i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SDA, DDC_SDA);
145 i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SDA : 0, DDC_SDA);
146}
147
148static int i740fb_ddc_getscl(void *data)
149{
150 struct i740fb_par *par = data;
151
152 i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SCL);
153
154 return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SCL);
155}
156
157static int i740fb_ddc_getsda(void *data)
158{
159 struct i740fb_par *par = data;
160
161 i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SDA);
162
163 return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SDA);
164}
165
166static int i740fb_setup_ddc_bus(struct fb_info *info)
167{
168 struct i740fb_par *par = info->par;
169
170 strlcpy(par->ddc_adapter.name, info->fix.id,
171 sizeof(par->ddc_adapter.name));
172 par->ddc_adapter.owner = THIS_MODULE;
173 par->ddc_adapter.class = I2C_CLASS_DDC;
174 par->ddc_adapter.algo_data = &par->ddc_algo;
175 par->ddc_adapter.dev.parent = info->device;
176 par->ddc_algo.setsda = i740fb_ddc_setsda;
177 par->ddc_algo.setscl = i740fb_ddc_setscl;
178 par->ddc_algo.getsda = i740fb_ddc_getsda;
179 par->ddc_algo.getscl = i740fb_ddc_getscl;
180 par->ddc_algo.udelay = 10;
181 par->ddc_algo.timeout = 20;
182 par->ddc_algo.data = par;
183
184 i2c_set_adapdata(&par->ddc_adapter, par);
185
186 return i2c_bit_add_bus(&par->ddc_adapter);
187}
188
189static int i740fb_open(struct fb_info *info, int user)
190{
191 struct i740fb_par *par = info->par;
192
193 mutex_lock(&(par->open_lock));
194 par->ref_count++;
195 mutex_unlock(&(par->open_lock));
196
197 return 0;
198}
199
200static int i740fb_release(struct fb_info *info, int user)
201{
202 struct i740fb_par *par = info->par;
203
204 mutex_lock(&(par->open_lock));
205 if (par->ref_count == 0) {
206 printk(KERN_ERR "fb%d: release called with zero refcount\n",
207 info->node);
208 mutex_unlock(&(par->open_lock));
209 return -EINVAL;
210 }
211
212 par->ref_count--;
213 mutex_unlock(&(par->open_lock));
214
215 return 0;
216}
217
218static u32 i740_calc_fifo(struct i740fb_par *par, u32 freq, int bpp)
219{
220
221
222
223
224
225
226
227
228 u32 wm;
229
230 switch (bpp) {
231 case 8:
232 if (freq > 200)
233 wm = 0x18120000;
234 else if (freq > 175)
235 wm = 0x16110000;
236 else if (freq > 135)
237 wm = 0x120E0000;
238 else
239 wm = 0x100D0000;
240 break;
241 case 15:
242 case 16:
243 if (par->has_sgram) {
244 if (freq > 140)
245 wm = 0x2C1D0000;
246 else if (freq > 120)
247 wm = 0x2C180000;
248 else if (freq > 100)
249 wm = 0x24160000;
250 else if (freq > 90)
251 wm = 0x18120000;
252 else if (freq > 50)
253 wm = 0x16110000;
254 else if (freq > 32)
255 wm = 0x13100000;
256 else
257 wm = 0x120E0000;
258 } else {
259 if (freq > 160)
260 wm = 0x28200000;
261 else if (freq > 140)
262 wm = 0x2A1E0000;
263 else if (freq > 130)
264 wm = 0x2B1A0000;
265 else if (freq > 120)
266 wm = 0x2C180000;
267 else if (freq > 100)
268 wm = 0x24180000;
269 else if (freq > 90)
270 wm = 0x18120000;
271 else if (freq > 50)
272 wm = 0x16110000;
273 else if (freq > 32)
274 wm = 0x13100000;
275 else
276 wm = 0x120E0000;
277 }
278 break;
279 case 24:
280 if (par->has_sgram) {
281 if (freq > 130)
282 wm = 0x31200000;
283 else if (freq > 120)
284 wm = 0x2E200000;
285 else if (freq > 100)
286 wm = 0x2C1D0000;
287 else if (freq > 80)
288 wm = 0x25180000;
289 else if (freq > 64)
290 wm = 0x24160000;
291 else if (freq > 49)
292 wm = 0x18120000;
293 else if (freq > 32)
294 wm = 0x16110000;
295 else
296 wm = 0x13100000;
297 } else {
298 if (freq > 120)
299 wm = 0x311F0000;
300 else if (freq > 100)
301 wm = 0x2C1D0000;
302 else if (freq > 80)
303 wm = 0x25180000;
304 else if (freq > 64)
305 wm = 0x24160000;
306 else if (freq > 49)
307 wm = 0x18120000;
308 else if (freq > 32)
309 wm = 0x16110000;
310 else
311 wm = 0x13100000;
312 }
313 break;
314 case 32:
315 if (par->has_sgram) {
316 if (freq > 80)
317 wm = 0x2A200000;
318 else if (freq > 60)
319 wm = 0x281A0000;
320 else if (freq > 49)
321 wm = 0x25180000;
322 else if (freq > 32)
323 wm = 0x18120000;
324 else
325 wm = 0x16110000;
326 } else {
327 if (freq > 80)
328 wm = 0x29200000;
329 else if (freq > 60)
330 wm = 0x281A0000;
331 else if (freq > 49)
332 wm = 0x25180000;
333 else if (freq > 32)
334 wm = 0x18120000;
335 else
336 wm = 0x16110000;
337 }
338 break;
339 }
340
341 return wm;
342}
343
344
345
346#define I740_RFREQ 1000000
347#define TARGET_MAX_N 30
348#define I740_FFIX (1 << 8)
349#define I740_RFREQ_FIX (I740_RFREQ / I740_FFIX)
350#define I740_REF_FREQ (6667 * I740_FFIX / 100)
351#define I740_MAX_VCO_FREQ (450 * I740_FFIX)
352
353static void i740_calc_vclk(u32 freq, struct i740fb_par *par)
354{
355 const u32 err_max = freq / (200 * I740_RFREQ / I740_FFIX);
356 const u32 err_target = freq / (1000 * I740_RFREQ / I740_FFIX);
357 u32 err_best = 512 * I740_FFIX;
358 u32 f_err, f_vco;
359 int m_best = 0, n_best = 0, p_best = 0, d_best = 0;
360 int m, n;
361
362 p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX)));
363 d_best = 0;
364 f_vco = (freq * (1 << p_best)) / I740_RFREQ_FIX;
365 freq = freq / I740_RFREQ_FIX;
366
367 n = 2;
368 do {
369 n++;
370 m = ((f_vco * n) / I740_REF_FREQ + 2) / 4;
371
372 if (m < 3)
373 m = 3;
374
375 {
376 u32 f_out = (((m * I740_REF_FREQ * (4 << 2 * d_best))
377 / n) + ((1 << p_best) / 2)) / (1 << p_best);
378
379 f_err = (freq - f_out);
380
381 if (abs(f_err) < err_max) {
382 m_best = m;
383 n_best = n;
384 err_best = f_err;
385 }
386 }
387 } while ((abs(f_err) >= err_target) &&
388 ((n <= TARGET_MAX_N) || (abs(err_best) > err_max)));
389
390 if (abs(f_err) < err_target) {
391 m_best = m;
392 n_best = n;
393 }
394
395 par->video_clk2_m = (m_best - 2) & 0xFF;
396 par->video_clk2_n = (n_best - 2) & 0xFF;
397 par->video_clk2_mn_msbs = ((((n_best - 2) >> 4) & VCO_N_MSBS)
398 | (((m_best - 2) >> 8) & VCO_M_MSBS));
399 par->video_clk2_div_sel =
400 ((p_best << 4) | (d_best ? 4 : 0) | REF_DIV_1);
401}
402
403static int i740fb_decode_var(const struct fb_var_screeninfo *var,
404 struct i740fb_par *par, struct fb_info *info)
405{
406
407
408
409
410
411 u32 xres, right, hslen, left, xtotal;
412 u32 yres, lower, vslen, upper, ytotal;
413 u32 vxres, xoffset, vyres, yoffset;
414 u32 bpp, base, dacspeed24, mem;
415 u8 r7;
416 int i;
417
418 dev_dbg(info->device, "decode_var: xres: %i, yres: %i, xres_v: %i, xres_v: %i\n",
419 var->xres, var->yres, var->xres_virtual, var->xres_virtual);
420 dev_dbg(info->device, " xoff: %i, yoff: %i, bpp: %i, graysc: %i\n",
421 var->xoffset, var->yoffset, var->bits_per_pixel,
422 var->grayscale);
423 dev_dbg(info->device, " activate: %i, nonstd: %i, vmode: %i\n",
424 var->activate, var->nonstd, var->vmode);
425 dev_dbg(info->device, " pixclock: %i, hsynclen:%i, vsynclen:%i\n",
426 var->pixclock, var->hsync_len, var->vsync_len);
427 dev_dbg(info->device, " left: %i, right: %i, up:%i, lower:%i\n",
428 var->left_margin, var->right_margin, var->upper_margin,
429 var->lower_margin);
430
431
432 bpp = var->bits_per_pixel;
433 switch (bpp) {
434 case 1 ... 8:
435 bpp = 8;
436 if ((1000000 / var->pixclock) > DACSPEED8) {
437 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 8bpp)\n",
438 1000000 / var->pixclock, DACSPEED8);
439 return -EINVAL;
440 }
441 break;
442 case 9 ... 15:
443 bpp = 15;
444 case 16:
445 if ((1000000 / var->pixclock) > DACSPEED16) {
446 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 15/16bpp)\n",
447 1000000 / var->pixclock, DACSPEED16);
448 return -EINVAL;
449 }
450 break;
451 case 17 ... 24:
452 bpp = 24;
453 dacspeed24 = par->has_sgram ? DACSPEED24_SG : DACSPEED24_SD;
454 if ((1000000 / var->pixclock) > dacspeed24) {
455 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 24bpp)\n",
456 1000000 / var->pixclock, dacspeed24);
457 return -EINVAL;
458 }
459 break;
460 case 25 ... 32:
461 bpp = 32;
462 if ((1000000 / var->pixclock) > DACSPEED32) {
463 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 32bpp)\n",
464 1000000 / var->pixclock, DACSPEED32);
465 return -EINVAL;
466 }
467 break;
468 default:
469 return -EINVAL;
470 }
471
472 xres = ALIGN(var->xres, 8);
473 vxres = ALIGN(var->xres_virtual, 16);
474 if (vxres < xres)
475 vxres = xres;
476
477 xoffset = ALIGN(var->xoffset, 8);
478 if (xres + xoffset > vxres)
479 xoffset = vxres - xres;
480
481 left = ALIGN(var->left_margin, 8);
482 right = ALIGN(var->right_margin, 8);
483 hslen = ALIGN(var->hsync_len, 8);
484
485 yres = var->yres;
486 vyres = var->yres_virtual;
487 if (yres > vyres)
488 vyres = yres;
489
490 yoffset = var->yoffset;
491 if (yres + yoffset > vyres)
492 yoffset = vyres - yres;
493
494 lower = var->lower_margin;
495 vslen = var->vsync_len;
496 upper = var->upper_margin;
497
498 mem = vxres * vyres * ((bpp + 1) / 8);
499 if (mem > info->screen_size) {
500 dev_err(info->device, "not enough video memory (%d KB requested, %ld KB available)\n",
501 mem >> 10, info->screen_size >> 10);
502 return -ENOMEM;
503 }
504
505 if (yoffset + yres > vyres)
506 yoffset = vyres - yres;
507
508 xtotal = xres + right + hslen + left;
509 ytotal = yres + lower + vslen + upper;
510
511 par->crtc[VGA_CRTC_H_TOTAL] = (xtotal >> 3) - 5;
512 par->crtc[VGA_CRTC_H_DISP] = (xres >> 3) - 1;
513 par->crtc[VGA_CRTC_H_BLANK_START] = ((xres + right) >> 3) - 1;
514 par->crtc[VGA_CRTC_H_SYNC_START] = (xres + right) >> 3;
515 par->crtc[VGA_CRTC_H_SYNC_END] = (((xres + right + hslen) >> 3) & 0x1F)
516 | ((((xres + right + hslen) >> 3) & 0x20) << 2);
517 par->crtc[VGA_CRTC_H_BLANK_END] = ((xres + right + hslen) >> 3 & 0x1F)
518 | 0x80;
519
520 par->crtc[VGA_CRTC_V_TOTAL] = ytotal - 2;
521
522 r7 = 0x10;
523 if (ytotal & 0x100)
524 r7 |= 0x01;
525 if (ytotal & 0x200)
526 r7 |= 0x20;
527
528 par->crtc[VGA_CRTC_PRESET_ROW] = 0;
529 par->crtc[VGA_CRTC_MAX_SCAN] = 0x40;
530 if (var->vmode & FB_VMODE_DOUBLE)
531 par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80;
532 par->crtc[VGA_CRTC_CURSOR_START] = 0x00;
533 par->crtc[VGA_CRTC_CURSOR_END] = 0x00;
534 par->crtc[VGA_CRTC_CURSOR_HI] = 0x00;
535 par->crtc[VGA_CRTC_CURSOR_LO] = 0x00;
536 par->crtc[VGA_CRTC_V_DISP_END] = yres-1;
537 if ((yres-1) & 0x100)
538 r7 |= 0x02;
539 if ((yres-1) & 0x200)
540 r7 |= 0x40;
541
542 par->crtc[VGA_CRTC_V_BLANK_START] = yres + lower - 1;
543 par->crtc[VGA_CRTC_V_SYNC_START] = yres + lower - 1;
544 if ((yres + lower - 1) & 0x100)
545 r7 |= 0x0C;
546 if ((yres + lower - 1) & 0x200) {
547 par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20;
548 r7 |= 0x80;
549 }
550
551
552 par->crtc[VGA_CRTC_V_SYNC_END] =
553 ((yres + lower - 1 + vslen) & 0x0F) & ~0x10;
554
555 par->crtc[VGA_CRTC_V_BLANK_END] = (yres + lower - 1 + vslen) & 0xFF;
556
557 par->crtc[VGA_CRTC_UNDERLINE] = 0x00;
558 par->crtc[VGA_CRTC_MODE] = 0xC3 ;
559 par->crtc[VGA_CRTC_LINE_COMPARE] = 0xFF;
560 par->crtc[VGA_CRTC_OVERFLOW] = r7;
561
562 par->vss = 0x00;
563
564 for (i = 0x00; i < 0x10; i++)
565 par->atc[i] = i;
566 par->atc[VGA_ATC_MODE] = 0x81;
567 par->atc[VGA_ATC_OVERSCAN] = 0x00;
568 par->atc[VGA_ATC_PLANE_ENABLE] = 0x0F;
569 par->atc[VGA_ATC_COLOR_PAGE] = 0x00;
570
571 par->misc = 0xC3;
572 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
573 par->misc &= ~0x40;
574 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
575 par->misc &= ~0x80;
576
577 par->seq[VGA_SEQ_CLOCK_MODE] = 0x01;
578 par->seq[VGA_SEQ_PLANE_WRITE] = 0x0F;
579 par->seq[VGA_SEQ_CHARACTER_MAP] = 0x00;
580 par->seq[VGA_SEQ_MEMORY_MODE] = 0x06;
581
582 par->gdc[VGA_GFX_SR_VALUE] = 0x00;
583 par->gdc[VGA_GFX_SR_ENABLE] = 0x00;
584 par->gdc[VGA_GFX_COMPARE_VALUE] = 0x00;
585 par->gdc[VGA_GFX_DATA_ROTATE] = 0x00;
586 par->gdc[VGA_GFX_PLANE_READ] = 0;
587 par->gdc[VGA_GFX_MODE] = 0x02;
588 par->gdc[VGA_GFX_MISC] = 0x05;
589 par->gdc[VGA_GFX_COMPARE_MASK] = 0x0F;
590 par->gdc[VGA_GFX_BIT_MASK] = 0xFF;
591
592 base = (yoffset * vxres + (xoffset & ~7)) >> 2;
593 switch (bpp) {
594 case 8:
595 par->crtc[VGA_CRTC_OFFSET] = vxres >> 3;
596 par->ext_offset = vxres >> 11;
597 par->pixelpipe_cfg1 = DISPLAY_8BPP_MODE;
598 par->bitblt_cntl = COLEXP_8BPP;
599 break;
600 case 15:
601 case 16:
602 par->pixelpipe_cfg1 = (var->green.length == 6) ?
603 DISPLAY_16BPP_MODE : DISPLAY_15BPP_MODE;
604 par->crtc[VGA_CRTC_OFFSET] = vxres >> 2;
605 par->ext_offset = vxres >> 10;
606 par->bitblt_cntl = COLEXP_16BPP;
607 base *= 2;
608 break;
609 case 24:
610 par->crtc[VGA_CRTC_OFFSET] = (vxres * 3) >> 3;
611 par->ext_offset = (vxres * 3) >> 11;
612 par->pixelpipe_cfg1 = DISPLAY_24BPP_MODE;
613 par->bitblt_cntl = COLEXP_24BPP;
614 base &= 0xFFFFFFFE;
615 base *= 3;
616 break;
617 case 32:
618 par->crtc[VGA_CRTC_OFFSET] = vxres >> 1;
619 par->ext_offset = vxres >> 9;
620 par->pixelpipe_cfg1 = DISPLAY_32BPP_MODE;
621 par->bitblt_cntl = COLEXP_RESERVED;
622 base *= 4;
623 break;
624 }
625
626 par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF;
627 par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >> 8;
628 par->ext_start_addr =
629 ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE;
630 par->ext_start_addr_hi = (base & 0x3FC00000) >> 22;
631
632 par->pixelpipe_cfg0 = DAC_8_BIT;
633
634 par->pixelpipe_cfg2 = DISPLAY_GAMMA_ENABLE | OVERLAY_GAMMA_ENABLE;
635 par->io_cntl = EXTENDED_CRTC_CNTL;
636 par->address_mapping = LINEAR_MODE_ENABLE | PAGE_MAPPING_ENABLE;
637 par->display_cntl = HIRES_MODE;
638
639
640 par->pll_cntl = PLL_MEMCLK_100000KHZ;
641
642
643 par->ext_vert_total = (ytotal - 2) >> 8;
644 par->ext_vert_disp_end = (yres - 1) >> 8;
645 par->ext_vert_sync_start = (yres + lower) >> 8;
646 par->ext_vert_blank_start = (yres + lower) >> 8;
647 par->ext_horiz_total = ((xtotal >> 3) - 5) >> 8;
648 par->ext_horiz_blank = (((xres + right) >> 3) & 0x40) >> 6;
649
650 par->interlace_cntl = INTERLACE_DISABLE;
651
652
653 par->atc[VGA_ATC_OVERSCAN] = 0;
654
655
656 i740_calc_vclk((((u32)1e9) / var->pixclock) * (u32)(1e3), par);
657
658
659 par->misc |= 0x0C;
660
661
662 par->lmi_fifo_watermark =
663 i740_calc_fifo(par, 1000000 / var->pixclock, bpp);
664
665 return 0;
666}
667
668static int i740fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
669{
670 switch (var->bits_per_pixel) {
671 case 8:
672 var->red.offset = var->green.offset = var->blue.offset = 0;
673 var->red.length = var->green.length = var->blue.length = 8;
674 break;
675 case 16:
676 switch (var->green.length) {
677 default:
678 case 5:
679 var->red.offset = 10;
680 var->green.offset = 5;
681 var->blue.offset = 0;
682 var->red.length = 5;
683 var->green.length = 5;
684 var->blue.length = 5;
685 break;
686 case 6:
687 var->red.offset = 11;
688 var->green.offset = 5;
689 var->blue.offset = 0;
690 var->red.length = var->blue.length = 5;
691 break;
692 }
693 break;
694 case 24:
695 var->red.offset = 16;
696 var->green.offset = 8;
697 var->blue.offset = 0;
698 var->red.length = var->green.length = var->blue.length = 8;
699 break;
700 case 32:
701 var->transp.offset = 24;
702 var->red.offset = 16;
703 var->green.offset = 8;
704 var->blue.offset = 0;
705 var->transp.length = 8;
706 var->red.length = var->green.length = var->blue.length = 8;
707 break;
708 default:
709 return -EINVAL;
710 }
711
712 if (var->xres > var->xres_virtual)
713 var->xres_virtual = var->xres;
714
715 if (var->yres > var->yres_virtual)
716 var->yres_virtual = var->yres;
717
718 if (info->monspecs.hfmax && info->monspecs.vfmax &&
719 info->monspecs.dclkmax && fb_validate_mode(var, info) < 0)
720 return -EINVAL;
721
722 return 0;
723}
724
725static void vga_protect(struct i740fb_par *par)
726{
727
728 i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0x20, 0x20);
729
730 i740inb(par, 0x3DA);
731 i740outb(par, VGA_ATT_W, 0x00);
732}
733
734static void vga_unprotect(struct i740fb_par *par)
735{
736
737 i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0, 0x20);
738
739 i740inb(par, 0x3DA);
740 i740outb(par, VGA_ATT_W, 0x20);
741}
742
743static int i740fb_set_par(struct fb_info *info)
744{
745 struct i740fb_par *par = info->par;
746 u32 itemp;
747 int i;
748
749 i = i740fb_decode_var(&info->var, par, info);
750 if (i)
751 return i;
752
753 memset(info->screen_base, 0, info->screen_size);
754
755 vga_protect(par);
756
757 i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_DISABLE);
758
759 mdelay(1);
760
761 i740outreg(par, XRX, VCLK2_VCO_M, par->video_clk2_m);
762 i740outreg(par, XRX, VCLK2_VCO_N, par->video_clk2_n);
763 i740outreg(par, XRX, VCLK2_VCO_MN_MSBS, par->video_clk2_mn_msbs);
764 i740outreg(par, XRX, VCLK2_VCO_DIV_SEL, par->video_clk2_div_sel);
765
766 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0,
767 par->pixelpipe_cfg0 & DAC_8_BIT, 0x80);
768
769 i740inb(par, 0x3DA);
770 i740outb(par, 0x3C0, 0x00);
771
772
773 i740outb(par, VGA_MIS_W, par->misc | 0x01);
774
775
776 i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x01);
777
778 i740outreg(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE,
779 par->seq[VGA_SEQ_CLOCK_MODE] | 0x20);
780 for (i = 2; i < VGA_SEQ_C; i++)
781 i740outreg(par, VGA_SEQ_I, i, par->seq[i]);
782
783
784 i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x03);
785
786
787 i740outreg(par, VGA_CRT_IC, VGA_CRTC_V_SYNC_END,
788 par->crtc[VGA_CRTC_V_SYNC_END]);
789
790
791 for (i = 0; i < VGA_CRT_C; i++)
792 i740outreg(par, VGA_CRT_IC, i, par->crtc[i]);
793
794
795 for (i = 0; i < VGA_GFX_C; i++)
796 i740outreg(par, VGA_GFX_I, i, par->gdc[i]);
797
798
799 for (i = 0; i < VGA_ATT_C; i++) {
800 i740inb(par, VGA_IS1_RC);
801 i740outb(par, VGA_ATT_IW, i);
802 i740outb(par, VGA_ATT_IW, par->atc[i]);
803 }
804
805 i740inb(par, VGA_IS1_RC);
806 i740outb(par, VGA_ATT_IW, 0x20);
807
808 i740outreg(par, VGA_CRT_IC, EXT_VERT_TOTAL, par->ext_vert_total);
809 i740outreg(par, VGA_CRT_IC, EXT_VERT_DISPLAY, par->ext_vert_disp_end);
810 i740outreg(par, VGA_CRT_IC, EXT_VERT_SYNC_START,
811 par->ext_vert_sync_start);
812 i740outreg(par, VGA_CRT_IC, EXT_VERT_BLANK_START,
813 par->ext_vert_blank_start);
814 i740outreg(par, VGA_CRT_IC, EXT_HORIZ_TOTAL, par->ext_horiz_total);
815 i740outreg(par, VGA_CRT_IC, EXT_HORIZ_BLANK, par->ext_horiz_blank);
816 i740outreg(par, VGA_CRT_IC, EXT_OFFSET, par->ext_offset);
817 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI, par->ext_start_addr_hi);
818 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR, par->ext_start_addr);
819
820 i740outreg_mask(par, VGA_CRT_IC, INTERLACE_CNTL,
821 par->interlace_cntl, INTERLACE_ENABLE);
822 i740outreg_mask(par, XRX, ADDRESS_MAPPING, par->address_mapping, 0x1F);
823 i740outreg_mask(par, XRX, BITBLT_CNTL, par->bitblt_cntl, COLEXP_MODE);
824 i740outreg_mask(par, XRX, DISPLAY_CNTL,
825 par->display_cntl, VGA_WRAP_MODE | GUI_MODE);
826 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0, par->pixelpipe_cfg0, 0x9B);
827 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_2, par->pixelpipe_cfg2, 0x0C);
828
829 i740outreg(par, XRX, PLL_CNTL, par->pll_cntl);
830
831 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_1,
832 par->pixelpipe_cfg1, DISPLAY_COLOR_MODE);
833
834 itemp = readl(par->regs + FWATER_BLC);
835 itemp &= ~(LMI_BURST_LENGTH | LMI_FIFO_WATERMARK);
836 itemp |= par->lmi_fifo_watermark;
837 writel(itemp, par->regs + FWATER_BLC);
838
839 i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_60HZ);
840
841 i740outreg_mask(par, MRX, COL_KEY_CNTL_1, 0, BLANK_DISP_OVERLAY);
842 i740outreg_mask(par, XRX, IO_CTNL,
843 par->io_cntl, EXTENDED_ATTR_CNTL | EXTENDED_CRTC_CNTL);
844
845 if (par->pixelpipe_cfg1 != DISPLAY_8BPP_MODE) {
846 i740outb(par, VGA_PEL_MSK, 0xFF);
847 i740outb(par, VGA_PEL_IW, 0x00);
848 for (i = 0; i < 256; i++) {
849 itemp = (par->pixelpipe_cfg0 & DAC_8_BIT) ? i : i >> 2;
850 i740outb(par, VGA_PEL_D, itemp);
851 i740outb(par, VGA_PEL_D, itemp);
852 i740outb(par, VGA_PEL_D, itemp);
853 }
854 }
855
856
857 mdelay(50);
858 vga_unprotect(par);
859
860 info->fix.line_length =
861 info->var.xres_virtual * info->var.bits_per_pixel / 8;
862 if (info->var.bits_per_pixel == 8)
863 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
864 else
865 info->fix.visual = FB_VISUAL_TRUECOLOR;
866
867 return 0;
868}
869
870static int i740fb_setcolreg(unsigned regno, unsigned red, unsigned green,
871 unsigned blue, unsigned transp,
872 struct fb_info *info)
873{
874 u32 r, g, b;
875
876 dev_dbg(info->device, "setcolreg: regno: %i, red=%d, green=%d, blue=%d, transp=%d, bpp=%d\n",
877 regno, red, green, blue, transp, info->var.bits_per_pixel);
878
879 switch (info->fix.visual) {
880 case FB_VISUAL_PSEUDOCOLOR:
881 if (regno >= 256)
882 return -EINVAL;
883 i740outb(info->par, VGA_PEL_IW, regno);
884 i740outb(info->par, VGA_PEL_D, red >> 8);
885 i740outb(info->par, VGA_PEL_D, green >> 8);
886 i740outb(info->par, VGA_PEL_D, blue >> 8);
887 break;
888 case FB_VISUAL_TRUECOLOR:
889 if (regno >= 16)
890 return -EINVAL;
891 r = (red >> (16 - info->var.red.length))
892 << info->var.red.offset;
893 b = (blue >> (16 - info->var.blue.length))
894 << info->var.blue.offset;
895 g = (green >> (16 - info->var.green.length))
896 << info->var.green.offset;
897 ((u32 *) info->pseudo_palette)[regno] = r | g | b;
898 break;
899 default:
900 return -EINVAL;
901 }
902
903 return 0;
904}
905
906static int i740fb_pan_display(struct fb_var_screeninfo *var,
907 struct fb_info *info)
908{
909 struct i740fb_par *par = info->par;
910 u32 base = (var->yoffset * info->var.xres_virtual
911 + (var->xoffset & ~7)) >> 2;
912
913 dev_dbg(info->device, "pan_display: xoffset: %i yoffset: %i base: %i\n",
914 var->xoffset, var->yoffset, base);
915
916 switch (info->var.bits_per_pixel) {
917 case 8:
918 break;
919 case 15:
920 case 16:
921 base *= 2;
922 break;
923 case 24:
924
925
926
927
928 base &= 0xFFFFFFFE;
929 base *= 3;
930 break;
931 case 32:
932 base *= 4;
933 break;
934 }
935
936 par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF;
937 par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >> 8;
938 par->ext_start_addr_hi = (base & 0x3FC00000) >> 22;
939 par->ext_start_addr =
940 ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE;
941
942 i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_LO, base & 0x000000FF);
943 i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_HI,
944 (base & 0x0000FF00) >> 8);
945 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI,
946 (base & 0x3FC00000) >> 22);
947 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR,
948 ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE);
949
950 return 0;
951}
952
953static int i740fb_blank(int blank_mode, struct fb_info *info)
954{
955 struct i740fb_par *par = info->par;
956
957 unsigned char SEQ01;
958 int DPMSSyncSelect;
959
960 switch (blank_mode) {
961 case FB_BLANK_UNBLANK:
962 case FB_BLANK_NORMAL:
963 SEQ01 = 0x00;
964 DPMSSyncSelect = HSYNC_ON | VSYNC_ON;
965 break;
966 case FB_BLANK_VSYNC_SUSPEND:
967 SEQ01 = 0x20;
968 DPMSSyncSelect = HSYNC_ON | VSYNC_OFF;
969 break;
970 case FB_BLANK_HSYNC_SUSPEND:
971 SEQ01 = 0x20;
972 DPMSSyncSelect = HSYNC_OFF | VSYNC_ON;
973 break;
974 case FB_BLANK_POWERDOWN:
975 SEQ01 = 0x20;
976 DPMSSyncSelect = HSYNC_OFF | VSYNC_OFF;
977 break;
978 default:
979 return -EINVAL;
980 }
981
982 i740outb(par, SRX, 0x01);
983 SEQ01 |= i740inb(par, SRX + 1) & ~0x20;
984 i740outb(par, SRX, 0x01);
985 i740outb(par, SRX + 1, SEQ01);
986
987
988 i740outreg(par, XRX, DPMS_SYNC_SELECT, DPMSSyncSelect);
989
990
991 return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
992}
993
994static struct fb_ops i740fb_ops = {
995 .owner = THIS_MODULE,
996 .fb_open = i740fb_open,
997 .fb_release = i740fb_release,
998 .fb_check_var = i740fb_check_var,
999 .fb_set_par = i740fb_set_par,
1000 .fb_setcolreg = i740fb_setcolreg,
1001 .fb_blank = i740fb_blank,
1002 .fb_pan_display = i740fb_pan_display,
1003 .fb_fillrect = cfb_fillrect,
1004 .fb_copyarea = cfb_copyarea,
1005 .fb_imageblit = cfb_imageblit,
1006};
1007
1008
1009
1010static int i740fb_probe(struct pci_dev *dev, const struct pci_device_id *ent)
1011{
1012 struct fb_info *info;
1013 struct i740fb_par *par;
1014 int ret, tmp;
1015 bool found = false;
1016 u8 *edid;
1017
1018 info = framebuffer_alloc(sizeof(struct i740fb_par), &(dev->dev));
1019 if (!info) {
1020 dev_err(&(dev->dev), "cannot allocate framebuffer\n");
1021 return -ENOMEM;
1022 }
1023
1024 par = info->par;
1025 mutex_init(&par->open_lock);
1026
1027 info->var.activate = FB_ACTIVATE_NOW;
1028 info->var.bits_per_pixel = 8;
1029 info->fbops = &i740fb_ops;
1030 info->pseudo_palette = par->pseudo_palette;
1031
1032 ret = pci_enable_device(dev);
1033 if (ret) {
1034 dev_err(info->device, "cannot enable PCI device\n");
1035 goto err_enable_device;
1036 }
1037
1038 ret = pci_request_regions(dev, info->fix.id);
1039 if (ret) {
1040 dev_err(info->device, "error requesting regions\n");
1041 goto err_request_regions;
1042 }
1043
1044 info->screen_base = pci_ioremap_bar(dev, 0);
1045 if (!info->screen_base) {
1046 dev_err(info->device, "error remapping base\n");
1047 ret = -ENOMEM;
1048 goto err_ioremap_1;
1049 }
1050
1051 par->regs = pci_ioremap_bar(dev, 1);
1052 if (!par->regs) {
1053 dev_err(info->device, "error remapping MMIO\n");
1054 ret = -ENOMEM;
1055 goto err_ioremap_2;
1056 }
1057
1058
1059 if ((i740inreg(par, XRX, DRAM_ROW_TYPE) & DRAM_ROW_1)
1060 == DRAM_ROW_1_SDRAM)
1061 i740outb(par, XRX, DRAM_ROW_BNDRY_1);
1062 else
1063 i740outb(par, XRX, DRAM_ROW_BNDRY_0);
1064 info->screen_size = i740inb(par, XRX + 1) * 1024 * 1024;
1065
1066 tmp = i740inreg(par, XRX, DRAM_ROW_CNTL_LO);
1067 par->has_sgram = !((tmp & DRAM_RAS_TIMING) ||
1068 (tmp & DRAM_RAS_PRECHARGE));
1069
1070 printk(KERN_INFO "fb%d: Intel740 on %s, %ld KB %s\n", info->node,
1071 pci_name(dev), info->screen_size >> 10,
1072 par->has_sgram ? "SGRAM" : "SDRAM");
1073
1074 info->fix = i740fb_fix;
1075 info->fix.mmio_start = pci_resource_start(dev, 1);
1076 info->fix.mmio_len = pci_resource_len(dev, 1);
1077 info->fix.smem_start = pci_resource_start(dev, 0);
1078 info->fix.smem_len = info->screen_size;
1079 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
1080
1081 if (i740fb_setup_ddc_bus(info) == 0) {
1082 par->ddc_registered = true;
1083 edid = fb_ddc_read(&par->ddc_adapter);
1084 if (edid) {
1085 fb_edid_to_monspecs(edid, &info->monspecs);
1086 kfree(edid);
1087 if (!info->monspecs.modedb)
1088 dev_err(info->device,
1089 "error getting mode database\n");
1090 else {
1091 const struct fb_videomode *m;
1092
1093 fb_videomode_to_modelist(
1094 info->monspecs.modedb,
1095 info->monspecs.modedb_len,
1096 &info->modelist);
1097 m = fb_find_best_display(&info->monspecs,
1098 &info->modelist);
1099 if (m) {
1100 fb_videomode_to_var(&info->var, m);
1101
1102 if (!i740fb_check_var(&info->var, info))
1103 found = true;
1104 }
1105 }
1106 }
1107 }
1108
1109 if (!mode_option && !found)
1110 mode_option = "640x480-8@60";
1111
1112 if (mode_option) {
1113 ret = fb_find_mode(&info->var, info, mode_option,
1114 info->monspecs.modedb,
1115 info->monspecs.modedb_len,
1116 NULL, info->var.bits_per_pixel);
1117 if (!ret || ret == 4) {
1118 dev_err(info->device, "mode %s not found\n",
1119 mode_option);
1120 ret = -EINVAL;
1121 }
1122 }
1123
1124 fb_destroy_modedb(info->monspecs.modedb);
1125 info->monspecs.modedb = NULL;
1126
1127
1128 info->var.yres_virtual = info->fix.smem_len * 8 /
1129 (info->var.bits_per_pixel * info->var.xres_virtual);
1130
1131 if (ret == -EINVAL)
1132 goto err_find_mode;
1133
1134 ret = fb_alloc_cmap(&info->cmap, 256, 0);
1135 if (ret) {
1136 dev_err(info->device, "cannot allocate colormap\n");
1137 goto err_alloc_cmap;
1138 }
1139
1140 ret = register_framebuffer(info);
1141 if (ret) {
1142 dev_err(info->device, "error registering framebuffer\n");
1143 goto err_reg_framebuffer;
1144 }
1145
1146 printk(KERN_INFO "fb%d: %s frame buffer device\n",
1147 info->node, info->fix.id);
1148 pci_set_drvdata(dev, info);
1149#ifdef CONFIG_MTRR
1150 if (mtrr) {
1151 par->mtrr_reg = -1;
1152 par->mtrr_reg = mtrr_add(info->fix.smem_start,
1153 info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
1154 }
1155#endif
1156 return 0;
1157
1158err_reg_framebuffer:
1159 fb_dealloc_cmap(&info->cmap);
1160err_alloc_cmap:
1161err_find_mode:
1162 if (par->ddc_registered)
1163 i2c_del_adapter(&par->ddc_adapter);
1164 pci_iounmap(dev, par->regs);
1165err_ioremap_2:
1166 pci_iounmap(dev, info->screen_base);
1167err_ioremap_1:
1168 pci_release_regions(dev);
1169err_request_regions:
1170
1171err_enable_device:
1172 framebuffer_release(info);
1173 return ret;
1174}
1175
1176static void i740fb_remove(struct pci_dev *dev)
1177{
1178 struct fb_info *info = pci_get_drvdata(dev);
1179
1180 if (info) {
1181 struct i740fb_par *par = info->par;
1182
1183#ifdef CONFIG_MTRR
1184 if (par->mtrr_reg >= 0) {
1185 mtrr_del(par->mtrr_reg, 0, 0);
1186 par->mtrr_reg = -1;
1187 }
1188#endif
1189 unregister_framebuffer(info);
1190 fb_dealloc_cmap(&info->cmap);
1191 if (par->ddc_registered)
1192 i2c_del_adapter(&par->ddc_adapter);
1193 pci_iounmap(dev, par->regs);
1194 pci_iounmap(dev, info->screen_base);
1195 pci_release_regions(dev);
1196
1197 pci_set_drvdata(dev, NULL);
1198 framebuffer_release(info);
1199 }
1200}
1201
1202#ifdef CONFIG_PM
1203static int i740fb_suspend(struct pci_dev *dev, pm_message_t state)
1204{
1205 struct fb_info *info = pci_get_drvdata(dev);
1206 struct i740fb_par *par = info->par;
1207
1208
1209 if (state.event == PM_EVENT_FREEZE || state.event == PM_EVENT_PRETHAW)
1210 return 0;
1211
1212 console_lock();
1213 mutex_lock(&(par->open_lock));
1214
1215
1216 if (par->ref_count == 0) {
1217 mutex_unlock(&(par->open_lock));
1218 console_unlock();
1219 return 0;
1220 }
1221
1222 fb_set_suspend(info, 1);
1223
1224 pci_save_state(dev);
1225 pci_disable_device(dev);
1226 pci_set_power_state(dev, pci_choose_state(dev, state));
1227
1228 mutex_unlock(&(par->open_lock));
1229 console_unlock();
1230
1231 return 0;
1232}
1233
1234static int i740fb_resume(struct pci_dev *dev)
1235{
1236 struct fb_info *info = pci_get_drvdata(dev);
1237 struct i740fb_par *par = info->par;
1238
1239 console_lock();
1240 mutex_lock(&(par->open_lock));
1241
1242 if (par->ref_count == 0)
1243 goto fail;
1244
1245 pci_set_power_state(dev, PCI_D0);
1246 pci_restore_state(dev);
1247 if (pci_enable_device(dev))
1248 goto fail;
1249
1250 i740fb_set_par(info);
1251 fb_set_suspend(info, 0);
1252
1253fail:
1254 mutex_unlock(&(par->open_lock));
1255 console_unlock();
1256 return 0;
1257}
1258#else
1259#define i740fb_suspend NULL
1260#define i740fb_resume NULL
1261#endif
1262
1263#define I740_ID_PCI 0x00d1
1264#define I740_ID_AGP 0x7800
1265
1266static DEFINE_PCI_DEVICE_TABLE(i740fb_id_table) = {
1267 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_PCI) },
1268 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_AGP) },
1269 { 0 }
1270};
1271MODULE_DEVICE_TABLE(pci, i740fb_id_table);
1272
1273static struct pci_driver i740fb_driver = {
1274 .name = "i740fb",
1275 .id_table = i740fb_id_table,
1276 .probe = i740fb_probe,
1277 .remove = i740fb_remove,
1278 .suspend = i740fb_suspend,
1279 .resume = i740fb_resume,
1280};
1281
1282#ifndef MODULE
1283static int __init i740fb_setup(char *options)
1284{
1285 char *opt;
1286
1287 if (!options || !*options)
1288 return 0;
1289
1290 while ((opt = strsep(&options, ",")) != NULL) {
1291 if (!*opt)
1292 continue;
1293#ifdef CONFIG_MTRR
1294 else if (!strncmp(opt, "mtrr:", 5))
1295 mtrr = simple_strtoul(opt + 5, NULL, 0);
1296#endif
1297 else
1298 mode_option = opt;
1299 }
1300
1301 return 0;
1302}
1303#endif
1304
1305int __init i740fb_init(void)
1306{
1307#ifndef MODULE
1308 char *option = NULL;
1309
1310 if (fb_get_options("i740fb", &option))
1311 return -ENODEV;
1312 i740fb_setup(option);
1313#endif
1314
1315 return pci_register_driver(&i740fb_driver);
1316}
1317
1318static void __exit i740fb_exit(void)
1319{
1320 pci_unregister_driver(&i740fb_driver);
1321}
1322
1323module_init(i740fb_init);
1324module_exit(i740fb_exit);
1325
1326MODULE_AUTHOR("(c) 2011 Ondrej Zary <linux@rainbow-software.org>");
1327MODULE_LICENSE("GPL");
1328MODULE_DESCRIPTION("fbdev driver for Intel740");
1329
1330module_param(mode_option, charp, 0444);
1331MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
1332
1333#ifdef CONFIG_MTRR
1334module_param(mtrr, int, 0444);
1335MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
1336#endif
1337
