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15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/string.h>
19#include <linux/mm.h>
20#include <linux/slab.h>
21#include <linux/delay.h>
22#include <linux/fb.h>
23#include <linux/init.h>
24#include <linux/pci.h>
25#include <linux/pci_ids.h>
26#include <linux/i2c.h>
27#include <linux/i2c-algo-bit.h>
28#include <linux/console.h>
29#include <video/vga.h>
30
31#include "i740_reg.h"
32
33static char *mode_option;
34static int mtrr = 1;
35
36struct i740fb_par {
37 unsigned char __iomem *regs;
38 bool has_sgram;
39 int wc_cookie;
40 bool ddc_registered;
41 struct i2c_adapter ddc_adapter;
42 struct i2c_algo_bit_data ddc_algo;
43 u32 pseudo_palette[16];
44 struct mutex open_lock;
45 unsigned int ref_count;
46
47 u8 crtc[VGA_CRT_C];
48 u8 atc[VGA_ATT_C];
49 u8 gdc[VGA_GFX_C];
50 u8 seq[VGA_SEQ_C];
51 u8 misc;
52 u8 vss;
53
54
55 u8 display_cntl;
56 u8 pixelpipe_cfg0;
57 u8 pixelpipe_cfg1;
58 u8 pixelpipe_cfg2;
59 u8 video_clk2_m;
60 u8 video_clk2_n;
61 u8 video_clk2_mn_msbs;
62 u8 video_clk2_div_sel;
63 u8 pll_cntl;
64 u8 address_mapping;
65 u8 io_cntl;
66 u8 bitblt_cntl;
67 u8 ext_vert_total;
68 u8 ext_vert_disp_end;
69 u8 ext_vert_sync_start;
70 u8 ext_vert_blank_start;
71 u8 ext_horiz_total;
72 u8 ext_horiz_blank;
73 u8 ext_offset;
74 u8 interlace_cntl;
75 u32 lmi_fifo_watermark;
76 u8 ext_start_addr;
77 u8 ext_start_addr_hi;
78};
79
80#define DACSPEED8 203
81#define DACSPEED16 163
82#define DACSPEED24_SG 136
83#define DACSPEED24_SD 128
84#define DACSPEED32 86
85
86static const struct fb_fix_screeninfo i740fb_fix = {
87 .id = "i740fb",
88 .type = FB_TYPE_PACKED_PIXELS,
89 .visual = FB_VISUAL_TRUECOLOR,
90 .xpanstep = 8,
91 .ypanstep = 1,
92 .accel = FB_ACCEL_NONE,
93};
94
95static inline void i740outb(struct i740fb_par *par, u16 port, u8 val)
96{
97 vga_mm_w(par->regs, port, val);
98}
99static inline u8 i740inb(struct i740fb_par *par, u16 port)
100{
101 return vga_mm_r(par->regs, port);
102}
103static inline void i740outreg(struct i740fb_par *par, u16 port, u8 reg, u8 val)
104{
105 vga_mm_w_fast(par->regs, port, reg, val);
106}
107static inline u8 i740inreg(struct i740fb_par *par, u16 port, u8 reg)
108{
109 vga_mm_w(par->regs, port, reg);
110 return vga_mm_r(par->regs, port+1);
111}
112static inline void i740outreg_mask(struct i740fb_par *par, u16 port, u8 reg,
113 u8 val, u8 mask)
114{
115 vga_mm_w_fast(par->regs, port, reg, (val & mask)
116 | (i740inreg(par, port, reg) & ~mask));
117}
118
119#define REG_DDC_DRIVE 0x62
120#define REG_DDC_STATE 0x63
121#define DDC_SCL (1 << 3)
122#define DDC_SDA (1 << 2)
123
124static void i740fb_ddc_setscl(void *data, int val)
125{
126 struct i740fb_par *par = data;
127
128 i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SCL, DDC_SCL);
129 i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SCL : 0, DDC_SCL);
130}
131
132static void i740fb_ddc_setsda(void *data, int val)
133{
134 struct i740fb_par *par = data;
135
136 i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SDA, DDC_SDA);
137 i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SDA : 0, DDC_SDA);
138}
139
140static int i740fb_ddc_getscl(void *data)
141{
142 struct i740fb_par *par = data;
143
144 i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SCL);
145
146 return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SCL);
147}
148
149static int i740fb_ddc_getsda(void *data)
150{
151 struct i740fb_par *par = data;
152
153 i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SDA);
154
155 return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SDA);
156}
157
158static int i740fb_setup_ddc_bus(struct fb_info *info)
159{
160 struct i740fb_par *par = info->par;
161
162 strlcpy(par->ddc_adapter.name, info->fix.id,
163 sizeof(par->ddc_adapter.name));
164 par->ddc_adapter.owner = THIS_MODULE;
165 par->ddc_adapter.class = I2C_CLASS_DDC;
166 par->ddc_adapter.algo_data = &par->ddc_algo;
167 par->ddc_adapter.dev.parent = info->device;
168 par->ddc_algo.setsda = i740fb_ddc_setsda;
169 par->ddc_algo.setscl = i740fb_ddc_setscl;
170 par->ddc_algo.getsda = i740fb_ddc_getsda;
171 par->ddc_algo.getscl = i740fb_ddc_getscl;
172 par->ddc_algo.udelay = 10;
173 par->ddc_algo.timeout = 20;
174 par->ddc_algo.data = par;
175
176 i2c_set_adapdata(&par->ddc_adapter, par);
177
178 return i2c_bit_add_bus(&par->ddc_adapter);
179}
180
181static int i740fb_open(struct fb_info *info, int user)
182{
183 struct i740fb_par *par = info->par;
184
185 mutex_lock(&(par->open_lock));
186 par->ref_count++;
187 mutex_unlock(&(par->open_lock));
188
189 return 0;
190}
191
192static int i740fb_release(struct fb_info *info, int user)
193{
194 struct i740fb_par *par = info->par;
195
196 mutex_lock(&(par->open_lock));
197 if (par->ref_count == 0) {
198 fb_err(info, "release called with zero refcount\n");
199 mutex_unlock(&(par->open_lock));
200 return -EINVAL;
201 }
202
203 par->ref_count--;
204 mutex_unlock(&(par->open_lock));
205
206 return 0;
207}
208
209static u32 i740_calc_fifo(struct i740fb_par *par, u32 freq, int bpp)
210{
211
212
213
214
215
216
217
218
219 u32 wm;
220
221 switch (bpp) {
222 case 8:
223 if (freq > 200)
224 wm = 0x18120000;
225 else if (freq > 175)
226 wm = 0x16110000;
227 else if (freq > 135)
228 wm = 0x120E0000;
229 else
230 wm = 0x100D0000;
231 break;
232 case 15:
233 case 16:
234 if (par->has_sgram) {
235 if (freq > 140)
236 wm = 0x2C1D0000;
237 else if (freq > 120)
238 wm = 0x2C180000;
239 else if (freq > 100)
240 wm = 0x24160000;
241 else if (freq > 90)
242 wm = 0x18120000;
243 else if (freq > 50)
244 wm = 0x16110000;
245 else if (freq > 32)
246 wm = 0x13100000;
247 else
248 wm = 0x120E0000;
249 } else {
250 if (freq > 160)
251 wm = 0x28200000;
252 else if (freq > 140)
253 wm = 0x2A1E0000;
254 else if (freq > 130)
255 wm = 0x2B1A0000;
256 else if (freq > 120)
257 wm = 0x2C180000;
258 else if (freq > 100)
259 wm = 0x24180000;
260 else if (freq > 90)
261 wm = 0x18120000;
262 else if (freq > 50)
263 wm = 0x16110000;
264 else if (freq > 32)
265 wm = 0x13100000;
266 else
267 wm = 0x120E0000;
268 }
269 break;
270 case 24:
271 if (par->has_sgram) {
272 if (freq > 130)
273 wm = 0x31200000;
274 else if (freq > 120)
275 wm = 0x2E200000;
276 else if (freq > 100)
277 wm = 0x2C1D0000;
278 else if (freq > 80)
279 wm = 0x25180000;
280 else if (freq > 64)
281 wm = 0x24160000;
282 else if (freq > 49)
283 wm = 0x18120000;
284 else if (freq > 32)
285 wm = 0x16110000;
286 else
287 wm = 0x13100000;
288 } else {
289 if (freq > 120)
290 wm = 0x311F0000;
291 else if (freq > 100)
292 wm = 0x2C1D0000;
293 else if (freq > 80)
294 wm = 0x25180000;
295 else if (freq > 64)
296 wm = 0x24160000;
297 else if (freq > 49)
298 wm = 0x18120000;
299 else if (freq > 32)
300 wm = 0x16110000;
301 else
302 wm = 0x13100000;
303 }
304 break;
305 case 32:
306 if (par->has_sgram) {
307 if (freq > 80)
308 wm = 0x2A200000;
309 else if (freq > 60)
310 wm = 0x281A0000;
311 else if (freq > 49)
312 wm = 0x25180000;
313 else if (freq > 32)
314 wm = 0x18120000;
315 else
316 wm = 0x16110000;
317 } else {
318 if (freq > 80)
319 wm = 0x29200000;
320 else if (freq > 60)
321 wm = 0x281A0000;
322 else if (freq > 49)
323 wm = 0x25180000;
324 else if (freq > 32)
325 wm = 0x18120000;
326 else
327 wm = 0x16110000;
328 }
329 break;
330 }
331
332 return wm;
333}
334
335
336
337#define I740_RFREQ 1000000
338#define TARGET_MAX_N 30
339#define I740_FFIX (1 << 8)
340#define I740_RFREQ_FIX (I740_RFREQ / I740_FFIX)
341#define I740_REF_FREQ (6667 * I740_FFIX / 100)
342#define I740_MAX_VCO_FREQ (450 * I740_FFIX)
343
344static void i740_calc_vclk(u32 freq, struct i740fb_par *par)
345{
346 const u32 err_max = freq / (200 * I740_RFREQ / I740_FFIX);
347 const u32 err_target = freq / (1000 * I740_RFREQ / I740_FFIX);
348 u32 err_best = 512 * I740_FFIX;
349 u32 f_err, f_vco;
350 int m_best = 0, n_best = 0, p_best = 0;
351 int m, n;
352
353 p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX)));
354 f_vco = (freq * (1 << p_best)) / I740_RFREQ_FIX;
355 freq = freq / I740_RFREQ_FIX;
356
357 n = 2;
358 do {
359 n++;
360 m = ((f_vco * n) / I740_REF_FREQ + 2) / 4;
361
362 if (m < 3)
363 m = 3;
364
365 {
366 u32 f_out = (((m * I740_REF_FREQ * 4)
367 / n) + ((1 << p_best) / 2)) / (1 << p_best);
368
369 f_err = (freq - f_out);
370
371 if (abs(f_err) < err_max) {
372 m_best = m;
373 n_best = n;
374 err_best = f_err;
375 }
376 }
377 } while ((abs(f_err) >= err_target) &&
378 ((n <= TARGET_MAX_N) || (abs(err_best) > err_max)));
379
380 if (abs(f_err) < err_target) {
381 m_best = m;
382 n_best = n;
383 }
384
385 par->video_clk2_m = (m_best - 2) & 0xFF;
386 par->video_clk2_n = (n_best - 2) & 0xFF;
387 par->video_clk2_mn_msbs = ((((n_best - 2) >> 4) & VCO_N_MSBS)
388 | (((m_best - 2) >> 8) & VCO_M_MSBS));
389 par->video_clk2_div_sel = ((p_best << 4) | REF_DIV_1);
390}
391
392static int i740fb_decode_var(const struct fb_var_screeninfo *var,
393 struct i740fb_par *par, struct fb_info *info)
394{
395
396
397
398
399
400 u32 xres, right, hslen, left, xtotal;
401 u32 yres, lower, vslen, upper, ytotal;
402 u32 vxres, xoffset, vyres, yoffset;
403 u32 bpp, base, dacspeed24, mem;
404 u8 r7;
405 int i;
406
407 dev_dbg(info->device, "decode_var: xres: %i, yres: %i, xres_v: %i, xres_v: %i\n",
408 var->xres, var->yres, var->xres_virtual, var->xres_virtual);
409 dev_dbg(info->device, " xoff: %i, yoff: %i, bpp: %i, graysc: %i\n",
410 var->xoffset, var->yoffset, var->bits_per_pixel,
411 var->grayscale);
412 dev_dbg(info->device, " activate: %i, nonstd: %i, vmode: %i\n",
413 var->activate, var->nonstd, var->vmode);
414 dev_dbg(info->device, " pixclock: %i, hsynclen:%i, vsynclen:%i\n",
415 var->pixclock, var->hsync_len, var->vsync_len);
416 dev_dbg(info->device, " left: %i, right: %i, up:%i, lower:%i\n",
417 var->left_margin, var->right_margin, var->upper_margin,
418 var->lower_margin);
419
420
421 bpp = var->bits_per_pixel;
422 switch (bpp) {
423 case 1 ... 8:
424 bpp = 8;
425 if ((1000000 / var->pixclock) > DACSPEED8) {
426 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 8bpp)\n",
427 1000000 / var->pixclock, DACSPEED8);
428 return -EINVAL;
429 }
430 break;
431 case 9 ... 15:
432 bpp = 15;
433 fallthrough;
434 case 16:
435 if ((1000000 / var->pixclock) > DACSPEED16) {
436 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 15/16bpp)\n",
437 1000000 / var->pixclock, DACSPEED16);
438 return -EINVAL;
439 }
440 break;
441 case 17 ... 24:
442 bpp = 24;
443 dacspeed24 = par->has_sgram ? DACSPEED24_SG : DACSPEED24_SD;
444 if ((1000000 / var->pixclock) > dacspeed24) {
445 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 24bpp)\n",
446 1000000 / var->pixclock, dacspeed24);
447 return -EINVAL;
448 }
449 break;
450 case 25 ... 32:
451 bpp = 32;
452 if ((1000000 / var->pixclock) > DACSPEED32) {
453 dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 32bpp)\n",
454 1000000 / var->pixclock, DACSPEED32);
455 return -EINVAL;
456 }
457 break;
458 default:
459 return -EINVAL;
460 }
461
462 xres = ALIGN(var->xres, 8);
463 vxres = ALIGN(var->xres_virtual, 16);
464 if (vxres < xres)
465 vxres = xres;
466
467 xoffset = ALIGN(var->xoffset, 8);
468 if (xres + xoffset > vxres)
469 xoffset = vxres - xres;
470
471 left = ALIGN(var->left_margin, 8);
472 right = ALIGN(var->right_margin, 8);
473 hslen = ALIGN(var->hsync_len, 8);
474
475 yres = var->yres;
476 vyres = var->yres_virtual;
477 if (yres > vyres)
478 vyres = yres;
479
480 yoffset = var->yoffset;
481 if (yres + yoffset > vyres)
482 yoffset = vyres - yres;
483
484 lower = var->lower_margin;
485 vslen = var->vsync_len;
486 upper = var->upper_margin;
487
488 mem = vxres * vyres * ((bpp + 1) / 8);
489 if (mem > info->screen_size) {
490 dev_err(info->device, "not enough video memory (%d KB requested, %ld KB available)\n",
491 mem >> 10, info->screen_size >> 10);
492 return -ENOMEM;
493 }
494
495 if (yoffset + yres > vyres)
496 yoffset = vyres - yres;
497
498 xtotal = xres + right + hslen + left;
499 ytotal = yres + lower + vslen + upper;
500
501 par->crtc[VGA_CRTC_H_TOTAL] = (xtotal >> 3) - 5;
502 par->crtc[VGA_CRTC_H_DISP] = (xres >> 3) - 1;
503 par->crtc[VGA_CRTC_H_BLANK_START] = ((xres + right) >> 3) - 1;
504 par->crtc[VGA_CRTC_H_SYNC_START] = (xres + right) >> 3;
505 par->crtc[VGA_CRTC_H_SYNC_END] = (((xres + right + hslen) >> 3) & 0x1F)
506 | ((((xres + right + hslen) >> 3) & 0x20) << 2);
507 par->crtc[VGA_CRTC_H_BLANK_END] = ((xres + right + hslen) >> 3 & 0x1F)
508 | 0x80;
509
510 par->crtc[VGA_CRTC_V_TOTAL] = ytotal - 2;
511
512 r7 = 0x10;
513 if (ytotal & 0x100)
514 r7 |= 0x01;
515 if (ytotal & 0x200)
516 r7 |= 0x20;
517
518 par->crtc[VGA_CRTC_PRESET_ROW] = 0;
519 par->crtc[VGA_CRTC_MAX_SCAN] = 0x40;
520 if (var->vmode & FB_VMODE_DOUBLE)
521 par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80;
522 par->crtc[VGA_CRTC_CURSOR_START] = 0x00;
523 par->crtc[VGA_CRTC_CURSOR_END] = 0x00;
524 par->crtc[VGA_CRTC_CURSOR_HI] = 0x00;
525 par->crtc[VGA_CRTC_CURSOR_LO] = 0x00;
526 par->crtc[VGA_CRTC_V_DISP_END] = yres-1;
527 if ((yres-1) & 0x100)
528 r7 |= 0x02;
529 if ((yres-1) & 0x200)
530 r7 |= 0x40;
531
532 par->crtc[VGA_CRTC_V_BLANK_START] = yres + lower - 1;
533 par->crtc[VGA_CRTC_V_SYNC_START] = yres + lower - 1;
534 if ((yres + lower - 1) & 0x100)
535 r7 |= 0x0C;
536 if ((yres + lower - 1) & 0x200) {
537 par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20;
538 r7 |= 0x80;
539 }
540
541
542 par->crtc[VGA_CRTC_V_SYNC_END] =
543 ((yres + lower - 1 + vslen) & 0x0F) & ~0x10;
544
545 par->crtc[VGA_CRTC_V_BLANK_END] = (yres + lower - 1 + vslen) & 0xFF;
546
547 par->crtc[VGA_CRTC_UNDERLINE] = 0x00;
548 par->crtc[VGA_CRTC_MODE] = 0xC3 ;
549 par->crtc[VGA_CRTC_LINE_COMPARE] = 0xFF;
550 par->crtc[VGA_CRTC_OVERFLOW] = r7;
551
552 par->vss = 0x00;
553
554 for (i = 0x00; i < 0x10; i++)
555 par->atc[i] = i;
556 par->atc[VGA_ATC_MODE] = 0x81;
557 par->atc[VGA_ATC_OVERSCAN] = 0x00;
558 par->atc[VGA_ATC_PLANE_ENABLE] = 0x0F;
559 par->atc[VGA_ATC_COLOR_PAGE] = 0x00;
560
561 par->misc = 0xC3;
562 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
563 par->misc &= ~0x40;
564 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
565 par->misc &= ~0x80;
566
567 par->seq[VGA_SEQ_CLOCK_MODE] = 0x01;
568 par->seq[VGA_SEQ_PLANE_WRITE] = 0x0F;
569 par->seq[VGA_SEQ_CHARACTER_MAP] = 0x00;
570 par->seq[VGA_SEQ_MEMORY_MODE] = 0x06;
571
572 par->gdc[VGA_GFX_SR_VALUE] = 0x00;
573 par->gdc[VGA_GFX_SR_ENABLE] = 0x00;
574 par->gdc[VGA_GFX_COMPARE_VALUE] = 0x00;
575 par->gdc[VGA_GFX_DATA_ROTATE] = 0x00;
576 par->gdc[VGA_GFX_PLANE_READ] = 0;
577 par->gdc[VGA_GFX_MODE] = 0x02;
578 par->gdc[VGA_GFX_MISC] = 0x05;
579 par->gdc[VGA_GFX_COMPARE_MASK] = 0x0F;
580 par->gdc[VGA_GFX_BIT_MASK] = 0xFF;
581
582 base = (yoffset * vxres + (xoffset & ~7)) >> 2;
583 switch (bpp) {
584 case 8:
585 par->crtc[VGA_CRTC_OFFSET] = vxres >> 3;
586 par->ext_offset = vxres >> 11;
587 par->pixelpipe_cfg1 = DISPLAY_8BPP_MODE;
588 par->bitblt_cntl = COLEXP_8BPP;
589 break;
590 case 15:
591 case 16:
592 par->pixelpipe_cfg1 = (var->green.length == 6) ?
593 DISPLAY_16BPP_MODE : DISPLAY_15BPP_MODE;
594 par->crtc[VGA_CRTC_OFFSET] = vxres >> 2;
595 par->ext_offset = vxres >> 10;
596 par->bitblt_cntl = COLEXP_16BPP;
597 base *= 2;
598 break;
599 case 24:
600 par->crtc[VGA_CRTC_OFFSET] = (vxres * 3) >> 3;
601 par->ext_offset = (vxres * 3) >> 11;
602 par->pixelpipe_cfg1 = DISPLAY_24BPP_MODE;
603 par->bitblt_cntl = COLEXP_24BPP;
604 base &= 0xFFFFFFFE;
605 base *= 3;
606 break;
607 case 32:
608 par->crtc[VGA_CRTC_OFFSET] = vxres >> 1;
609 par->ext_offset = vxres >> 9;
610 par->pixelpipe_cfg1 = DISPLAY_32BPP_MODE;
611 par->bitblt_cntl = COLEXP_RESERVED;
612 base *= 4;
613 break;
614 }
615
616 par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF;
617 par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >> 8;
618 par->ext_start_addr =
619 ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE;
620 par->ext_start_addr_hi = (base & 0x3FC00000) >> 22;
621
622 par->pixelpipe_cfg0 = DAC_8_BIT;
623
624 par->pixelpipe_cfg2 = DISPLAY_GAMMA_ENABLE | OVERLAY_GAMMA_ENABLE;
625 par->io_cntl = EXTENDED_CRTC_CNTL;
626 par->address_mapping = LINEAR_MODE_ENABLE | PAGE_MAPPING_ENABLE;
627 par->display_cntl = HIRES_MODE;
628
629
630 par->pll_cntl = PLL_MEMCLK_100000KHZ;
631
632
633 par->ext_vert_total = (ytotal - 2) >> 8;
634 par->ext_vert_disp_end = (yres - 1) >> 8;
635 par->ext_vert_sync_start = (yres + lower) >> 8;
636 par->ext_vert_blank_start = (yres + lower) >> 8;
637 par->ext_horiz_total = ((xtotal >> 3) - 5) >> 8;
638 par->ext_horiz_blank = (((xres + right) >> 3) & 0x40) >> 6;
639
640 par->interlace_cntl = INTERLACE_DISABLE;
641
642
643 par->atc[VGA_ATC_OVERSCAN] = 0;
644
645
646 i740_calc_vclk((((u32)1e9) / var->pixclock) * (u32)(1e3), par);
647
648
649 par->misc |= 0x0C;
650
651
652 par->lmi_fifo_watermark =
653 i740_calc_fifo(par, 1000000 / var->pixclock, bpp);
654
655 return 0;
656}
657
658static int i740fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
659{
660 if (!var->pixclock)
661 return -EINVAL;
662
663 switch (var->bits_per_pixel) {
664 case 8:
665 var->red.offset = var->green.offset = var->blue.offset = 0;
666 var->red.length = var->green.length = var->blue.length = 8;
667 break;
668 case 16:
669 switch (var->green.length) {
670 default:
671 case 5:
672 var->red.offset = 10;
673 var->green.offset = 5;
674 var->blue.offset = 0;
675 var->red.length = 5;
676 var->green.length = 5;
677 var->blue.length = 5;
678 break;
679 case 6:
680 var->red.offset = 11;
681 var->green.offset = 5;
682 var->blue.offset = 0;
683 var->red.length = var->blue.length = 5;
684 break;
685 }
686 break;
687 case 24:
688 var->red.offset = 16;
689 var->green.offset = 8;
690 var->blue.offset = 0;
691 var->red.length = var->green.length = var->blue.length = 8;
692 break;
693 case 32:
694 var->transp.offset = 24;
695 var->red.offset = 16;
696 var->green.offset = 8;
697 var->blue.offset = 0;
698 var->transp.length = 8;
699 var->red.length = var->green.length = var->blue.length = 8;
700 break;
701 default:
702 return -EINVAL;
703 }
704
705 if (var->xres > var->xres_virtual)
706 var->xres_virtual = var->xres;
707
708 if (var->yres > var->yres_virtual)
709 var->yres_virtual = var->yres;
710
711 if (info->monspecs.hfmax && info->monspecs.vfmax &&
712 info->monspecs.dclkmax && fb_validate_mode(var, info) < 0)
713 return -EINVAL;
714
715 return 0;
716}
717
718static void vga_protect(struct i740fb_par *par)
719{
720
721 i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0x20, 0x20);
722
723 i740inb(par, 0x3DA);
724 i740outb(par, VGA_ATT_W, 0x00);
725}
726
727static void vga_unprotect(struct i740fb_par *par)
728{
729
730 i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0, 0x20);
731
732 i740inb(par, 0x3DA);
733 i740outb(par, VGA_ATT_W, 0x20);
734}
735
736static int i740fb_set_par(struct fb_info *info)
737{
738 struct i740fb_par *par = info->par;
739 u32 itemp;
740 int i;
741
742 i = i740fb_decode_var(&info->var, par, info);
743 if (i)
744 return i;
745
746 memset_io(info->screen_base, 0, info->screen_size);
747
748 vga_protect(par);
749
750 i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_DISABLE);
751
752 mdelay(1);
753
754 i740outreg(par, XRX, VCLK2_VCO_M, par->video_clk2_m);
755 i740outreg(par, XRX, VCLK2_VCO_N, par->video_clk2_n);
756 i740outreg(par, XRX, VCLK2_VCO_MN_MSBS, par->video_clk2_mn_msbs);
757 i740outreg(par, XRX, VCLK2_VCO_DIV_SEL, par->video_clk2_div_sel);
758
759 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0,
760 par->pixelpipe_cfg0 & DAC_8_BIT, 0x80);
761
762 i740inb(par, 0x3DA);
763 i740outb(par, 0x3C0, 0x00);
764
765
766 i740outb(par, VGA_MIS_W, par->misc | 0x01);
767
768
769 i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x01);
770
771 i740outreg(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE,
772 par->seq[VGA_SEQ_CLOCK_MODE] | 0x20);
773 for (i = 2; i < VGA_SEQ_C; i++)
774 i740outreg(par, VGA_SEQ_I, i, par->seq[i]);
775
776
777 i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x03);
778
779
780 i740outreg(par, VGA_CRT_IC, VGA_CRTC_V_SYNC_END,
781 par->crtc[VGA_CRTC_V_SYNC_END]);
782
783
784 for (i = 0; i < VGA_CRT_C; i++)
785 i740outreg(par, VGA_CRT_IC, i, par->crtc[i]);
786
787
788 for (i = 0; i < VGA_GFX_C; i++)
789 i740outreg(par, VGA_GFX_I, i, par->gdc[i]);
790
791
792 for (i = 0; i < VGA_ATT_C; i++) {
793 i740inb(par, VGA_IS1_RC);
794 i740outb(par, VGA_ATT_IW, i);
795 i740outb(par, VGA_ATT_IW, par->atc[i]);
796 }
797
798 i740inb(par, VGA_IS1_RC);
799 i740outb(par, VGA_ATT_IW, 0x20);
800
801 i740outreg(par, VGA_CRT_IC, EXT_VERT_TOTAL, par->ext_vert_total);
802 i740outreg(par, VGA_CRT_IC, EXT_VERT_DISPLAY, par->ext_vert_disp_end);
803 i740outreg(par, VGA_CRT_IC, EXT_VERT_SYNC_START,
804 par->ext_vert_sync_start);
805 i740outreg(par, VGA_CRT_IC, EXT_VERT_BLANK_START,
806 par->ext_vert_blank_start);
807 i740outreg(par, VGA_CRT_IC, EXT_HORIZ_TOTAL, par->ext_horiz_total);
808 i740outreg(par, VGA_CRT_IC, EXT_HORIZ_BLANK, par->ext_horiz_blank);
809 i740outreg(par, VGA_CRT_IC, EXT_OFFSET, par->ext_offset);
810 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI, par->ext_start_addr_hi);
811 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR, par->ext_start_addr);
812
813 i740outreg_mask(par, VGA_CRT_IC, INTERLACE_CNTL,
814 par->interlace_cntl, INTERLACE_ENABLE);
815 i740outreg_mask(par, XRX, ADDRESS_MAPPING, par->address_mapping, 0x1F);
816 i740outreg_mask(par, XRX, BITBLT_CNTL, par->bitblt_cntl, COLEXP_MODE);
817 i740outreg_mask(par, XRX, DISPLAY_CNTL,
818 par->display_cntl, VGA_WRAP_MODE | GUI_MODE);
819 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0, par->pixelpipe_cfg0, 0x9B);
820 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_2, par->pixelpipe_cfg2, 0x0C);
821
822 i740outreg(par, XRX, PLL_CNTL, par->pll_cntl);
823
824 i740outreg_mask(par, XRX, PIXPIPE_CONFIG_1,
825 par->pixelpipe_cfg1, DISPLAY_COLOR_MODE);
826
827 itemp = readl(par->regs + FWATER_BLC);
828 itemp &= ~(LMI_BURST_LENGTH | LMI_FIFO_WATERMARK);
829 itemp |= par->lmi_fifo_watermark;
830 writel(itemp, par->regs + FWATER_BLC);
831
832 i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_60HZ);
833
834 i740outreg_mask(par, MRX, COL_KEY_CNTL_1, 0, BLANK_DISP_OVERLAY);
835 i740outreg_mask(par, XRX, IO_CTNL,
836 par->io_cntl, EXTENDED_ATTR_CNTL | EXTENDED_CRTC_CNTL);
837
838 if (par->pixelpipe_cfg1 != DISPLAY_8BPP_MODE) {
839 i740outb(par, VGA_PEL_MSK, 0xFF);
840 i740outb(par, VGA_PEL_IW, 0x00);
841 for (i = 0; i < 256; i++) {
842 itemp = (par->pixelpipe_cfg0 & DAC_8_BIT) ? i : i >> 2;
843 i740outb(par, VGA_PEL_D, itemp);
844 i740outb(par, VGA_PEL_D, itemp);
845 i740outb(par, VGA_PEL_D, itemp);
846 }
847 }
848
849
850 mdelay(50);
851 vga_unprotect(par);
852
853 info->fix.line_length =
854 info->var.xres_virtual * info->var.bits_per_pixel / 8;
855 if (info->var.bits_per_pixel == 8)
856 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
857 else
858 info->fix.visual = FB_VISUAL_TRUECOLOR;
859
860 return 0;
861}
862
863static int i740fb_setcolreg(unsigned regno, unsigned red, unsigned green,
864 unsigned blue, unsigned transp,
865 struct fb_info *info)
866{
867 u32 r, g, b;
868
869 dev_dbg(info->device, "setcolreg: regno: %i, red=%d, green=%d, blue=%d, transp=%d, bpp=%d\n",
870 regno, red, green, blue, transp, info->var.bits_per_pixel);
871
872 switch (info->fix.visual) {
873 case FB_VISUAL_PSEUDOCOLOR:
874 if (regno >= 256)
875 return -EINVAL;
876 i740outb(info->par, VGA_PEL_IW, regno);
877 i740outb(info->par, VGA_PEL_D, red >> 8);
878 i740outb(info->par, VGA_PEL_D, green >> 8);
879 i740outb(info->par, VGA_PEL_D, blue >> 8);
880 break;
881 case FB_VISUAL_TRUECOLOR:
882 if (regno >= 16)
883 return -EINVAL;
884 r = (red >> (16 - info->var.red.length))
885 << info->var.red.offset;
886 b = (blue >> (16 - info->var.blue.length))
887 << info->var.blue.offset;
888 g = (green >> (16 - info->var.green.length))
889 << info->var.green.offset;
890 ((u32 *) info->pseudo_palette)[regno] = r | g | b;
891 break;
892 default:
893 return -EINVAL;
894 }
895
896 return 0;
897}
898
899static int i740fb_pan_display(struct fb_var_screeninfo *var,
900 struct fb_info *info)
901{
902 struct i740fb_par *par = info->par;
903 u32 base = (var->yoffset * info->var.xres_virtual
904 + (var->xoffset & ~7)) >> 2;
905
906 dev_dbg(info->device, "pan_display: xoffset: %i yoffset: %i base: %i\n",
907 var->xoffset, var->yoffset, base);
908
909 switch (info->var.bits_per_pixel) {
910 case 8:
911 break;
912 case 15:
913 case 16:
914 base *= 2;
915 break;
916 case 24:
917
918
919
920
921 base &= 0xFFFFFFFE;
922 base *= 3;
923 break;
924 case 32:
925 base *= 4;
926 break;
927 }
928
929 par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF;
930 par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >> 8;
931 par->ext_start_addr_hi = (base & 0x3FC00000) >> 22;
932 par->ext_start_addr =
933 ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE;
934
935 i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_LO, base & 0x000000FF);
936 i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_HI,
937 (base & 0x0000FF00) >> 8);
938 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI,
939 (base & 0x3FC00000) >> 22);
940 i740outreg(par, VGA_CRT_IC, EXT_START_ADDR,
941 ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE);
942
943 return 0;
944}
945
946static int i740fb_blank(int blank_mode, struct fb_info *info)
947{
948 struct i740fb_par *par = info->par;
949
950 unsigned char SEQ01;
951 int DPMSSyncSelect;
952
953 switch (blank_mode) {
954 case FB_BLANK_UNBLANK:
955 case FB_BLANK_NORMAL:
956 SEQ01 = 0x00;
957 DPMSSyncSelect = HSYNC_ON | VSYNC_ON;
958 break;
959 case FB_BLANK_VSYNC_SUSPEND:
960 SEQ01 = 0x20;
961 DPMSSyncSelect = HSYNC_ON | VSYNC_OFF;
962 break;
963 case FB_BLANK_HSYNC_SUSPEND:
964 SEQ01 = 0x20;
965 DPMSSyncSelect = HSYNC_OFF | VSYNC_ON;
966 break;
967 case FB_BLANK_POWERDOWN:
968 SEQ01 = 0x20;
969 DPMSSyncSelect = HSYNC_OFF | VSYNC_OFF;
970 break;
971 default:
972 return -EINVAL;
973 }
974
975 i740outb(par, SRX, 0x01);
976 SEQ01 |= i740inb(par, SRX + 1) & ~0x20;
977 i740outb(par, SRX, 0x01);
978 i740outb(par, SRX + 1, SEQ01);
979
980
981 i740outreg(par, XRX, DPMS_SYNC_SELECT, DPMSSyncSelect);
982
983
984 return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
985}
986
987static const struct fb_ops i740fb_ops = {
988 .owner = THIS_MODULE,
989 .fb_open = i740fb_open,
990 .fb_release = i740fb_release,
991 .fb_check_var = i740fb_check_var,
992 .fb_set_par = i740fb_set_par,
993 .fb_setcolreg = i740fb_setcolreg,
994 .fb_blank = i740fb_blank,
995 .fb_pan_display = i740fb_pan_display,
996 .fb_fillrect = cfb_fillrect,
997 .fb_copyarea = cfb_copyarea,
998 .fb_imageblit = cfb_imageblit,
999};
1000
1001
1002
1003static int i740fb_probe(struct pci_dev *dev, const struct pci_device_id *ent)
1004{
1005 struct fb_info *info;
1006 struct i740fb_par *par;
1007 int ret, tmp;
1008 bool found = false;
1009 u8 *edid;
1010
1011 info = framebuffer_alloc(sizeof(struct i740fb_par), &(dev->dev));
1012 if (!info)
1013 return -ENOMEM;
1014
1015 par = info->par;
1016 mutex_init(&par->open_lock);
1017
1018 info->var.activate = FB_ACTIVATE_NOW;
1019 info->var.bits_per_pixel = 8;
1020 info->fbops = &i740fb_ops;
1021 info->pseudo_palette = par->pseudo_palette;
1022
1023 ret = pci_enable_device(dev);
1024 if (ret) {
1025 dev_err(info->device, "cannot enable PCI device\n");
1026 goto err_enable_device;
1027 }
1028
1029 ret = pci_request_regions(dev, info->fix.id);
1030 if (ret) {
1031 dev_err(info->device, "error requesting regions\n");
1032 goto err_request_regions;
1033 }
1034
1035 info->screen_base = pci_ioremap_wc_bar(dev, 0);
1036 if (!info->screen_base) {
1037 dev_err(info->device, "error remapping base\n");
1038 ret = -ENOMEM;
1039 goto err_ioremap_1;
1040 }
1041
1042 par->regs = pci_ioremap_bar(dev, 1);
1043 if (!par->regs) {
1044 dev_err(info->device, "error remapping MMIO\n");
1045 ret = -ENOMEM;
1046 goto err_ioremap_2;
1047 }
1048
1049
1050 if ((i740inreg(par, XRX, DRAM_ROW_TYPE) & DRAM_ROW_1)
1051 == DRAM_ROW_1_SDRAM)
1052 i740outb(par, XRX, DRAM_ROW_BNDRY_1);
1053 else
1054 i740outb(par, XRX, DRAM_ROW_BNDRY_0);
1055 info->screen_size = i740inb(par, XRX + 1) * 1024 * 1024;
1056
1057 tmp = i740inreg(par, XRX, DRAM_ROW_CNTL_LO);
1058 par->has_sgram = !((tmp & DRAM_RAS_TIMING) ||
1059 (tmp & DRAM_RAS_PRECHARGE));
1060
1061 fb_info(info, "Intel740 on %s, %ld KB %s\n",
1062 pci_name(dev), info->screen_size >> 10,
1063 par->has_sgram ? "SGRAM" : "SDRAM");
1064
1065 info->fix = i740fb_fix;
1066 info->fix.mmio_start = pci_resource_start(dev, 1);
1067 info->fix.mmio_len = pci_resource_len(dev, 1);
1068 info->fix.smem_start = pci_resource_start(dev, 0);
1069 info->fix.smem_len = info->screen_size;
1070 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
1071
1072 if (i740fb_setup_ddc_bus(info) == 0) {
1073 par->ddc_registered = true;
1074 edid = fb_ddc_read(&par->ddc_adapter);
1075 if (edid) {
1076 fb_edid_to_monspecs(edid, &info->monspecs);
1077 kfree(edid);
1078 if (!info->monspecs.modedb)
1079 dev_err(info->device,
1080 "error getting mode database\n");
1081 else {
1082 const struct fb_videomode *m;
1083
1084 fb_videomode_to_modelist(
1085 info->monspecs.modedb,
1086 info->monspecs.modedb_len,
1087 &info->modelist);
1088 m = fb_find_best_display(&info->monspecs,
1089 &info->modelist);
1090 if (m) {
1091 fb_videomode_to_var(&info->var, m);
1092
1093 if (!i740fb_check_var(&info->var, info))
1094 found = true;
1095 }
1096 }
1097 }
1098 }
1099
1100 if (!mode_option && !found)
1101 mode_option = "640x480-8@60";
1102
1103 if (mode_option) {
1104 ret = fb_find_mode(&info->var, info, mode_option,
1105 info->monspecs.modedb,
1106 info->monspecs.modedb_len,
1107 NULL, info->var.bits_per_pixel);
1108 if (!ret || ret == 4) {
1109 dev_err(info->device, "mode %s not found\n",
1110 mode_option);
1111 ret = -EINVAL;
1112 }
1113 }
1114
1115 fb_destroy_modedb(info->monspecs.modedb);
1116 info->monspecs.modedb = NULL;
1117
1118
1119 info->var.yres_virtual = info->fix.smem_len * 8 /
1120 (info->var.bits_per_pixel * info->var.xres_virtual);
1121
1122 if (ret == -EINVAL)
1123 goto err_find_mode;
1124
1125 ret = fb_alloc_cmap(&info->cmap, 256, 0);
1126 if (ret) {
1127 dev_err(info->device, "cannot allocate colormap\n");
1128 goto err_alloc_cmap;
1129 }
1130
1131 ret = register_framebuffer(info);
1132 if (ret) {
1133 dev_err(info->device, "error registering framebuffer\n");
1134 goto err_reg_framebuffer;
1135 }
1136
1137 fb_info(info, "%s frame buffer device\n", info->fix.id);
1138 pci_set_drvdata(dev, info);
1139 if (mtrr)
1140 par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
1141 info->fix.smem_len);
1142 return 0;
1143
1144err_reg_framebuffer:
1145 fb_dealloc_cmap(&info->cmap);
1146err_alloc_cmap:
1147err_find_mode:
1148 if (par->ddc_registered)
1149 i2c_del_adapter(&par->ddc_adapter);
1150 pci_iounmap(dev, par->regs);
1151err_ioremap_2:
1152 pci_iounmap(dev, info->screen_base);
1153err_ioremap_1:
1154 pci_release_regions(dev);
1155err_request_regions:
1156
1157err_enable_device:
1158 framebuffer_release(info);
1159 return ret;
1160}
1161
1162static void i740fb_remove(struct pci_dev *dev)
1163{
1164 struct fb_info *info = pci_get_drvdata(dev);
1165
1166 if (info) {
1167 struct i740fb_par *par = info->par;
1168 arch_phys_wc_del(par->wc_cookie);
1169 unregister_framebuffer(info);
1170 fb_dealloc_cmap(&info->cmap);
1171 if (par->ddc_registered)
1172 i2c_del_adapter(&par->ddc_adapter);
1173 pci_iounmap(dev, par->regs);
1174 pci_iounmap(dev, info->screen_base);
1175 pci_release_regions(dev);
1176
1177 framebuffer_release(info);
1178 }
1179}
1180
1181static int __maybe_unused i740fb_suspend(struct device *dev)
1182{
1183 struct fb_info *info = dev_get_drvdata(dev);
1184 struct i740fb_par *par = info->par;
1185
1186 console_lock();
1187 mutex_lock(&(par->open_lock));
1188
1189
1190 if (par->ref_count == 0) {
1191 mutex_unlock(&(par->open_lock));
1192 console_unlock();
1193 return 0;
1194 }
1195
1196 fb_set_suspend(info, 1);
1197
1198 mutex_unlock(&(par->open_lock));
1199 console_unlock();
1200
1201 return 0;
1202}
1203
1204static int __maybe_unused i740fb_resume(struct device *dev)
1205{
1206 struct fb_info *info = dev_get_drvdata(dev);
1207 struct i740fb_par *par = info->par;
1208
1209 console_lock();
1210 mutex_lock(&(par->open_lock));
1211
1212 if (par->ref_count == 0)
1213 goto fail;
1214
1215 i740fb_set_par(info);
1216 fb_set_suspend(info, 0);
1217
1218fail:
1219 mutex_unlock(&(par->open_lock));
1220 console_unlock();
1221 return 0;
1222}
1223
1224static const struct dev_pm_ops i740fb_pm_ops = {
1225#ifdef CONFIG_PM_SLEEP
1226 .suspend = i740fb_suspend,
1227 .resume = i740fb_resume,
1228 .freeze = NULL,
1229 .thaw = i740fb_resume,
1230 .poweroff = i740fb_suspend,
1231 .restore = i740fb_resume,
1232#endif
1233};
1234
1235#define I740_ID_PCI 0x00d1
1236#define I740_ID_AGP 0x7800
1237
1238static const struct pci_device_id i740fb_id_table[] = {
1239 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_PCI) },
1240 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_AGP) },
1241 { 0 }
1242};
1243MODULE_DEVICE_TABLE(pci, i740fb_id_table);
1244
1245static struct pci_driver i740fb_driver = {
1246 .name = "i740fb",
1247 .id_table = i740fb_id_table,
1248 .probe = i740fb_probe,
1249 .remove = i740fb_remove,
1250 .driver.pm = &i740fb_pm_ops,
1251};
1252
1253#ifndef MODULE
1254static int __init i740fb_setup(char *options)
1255{
1256 char *opt;
1257
1258 if (!options || !*options)
1259 return 0;
1260
1261 while ((opt = strsep(&options, ",")) != NULL) {
1262 if (!*opt)
1263 continue;
1264 else if (!strncmp(opt, "mtrr:", 5))
1265 mtrr = simple_strtoul(opt + 5, NULL, 0);
1266 else
1267 mode_option = opt;
1268 }
1269
1270 return 0;
1271}
1272#endif
1273
1274static int __init i740fb_init(void)
1275{
1276#ifndef MODULE
1277 char *option = NULL;
1278
1279 if (fb_get_options("i740fb", &option))
1280 return -ENODEV;
1281 i740fb_setup(option);
1282#endif
1283
1284 return pci_register_driver(&i740fb_driver);
1285}
1286
1287static void __exit i740fb_exit(void)
1288{
1289 pci_unregister_driver(&i740fb_driver);
1290}
1291
1292module_init(i740fb_init);
1293module_exit(i740fb_exit);
1294
1295MODULE_AUTHOR("(c) 2011 Ondrej Zary <linux@rainbow-software.org>");
1296MODULE_LICENSE("GPL");
1297MODULE_DESCRIPTION("fbdev driver for Intel740");
1298
1299module_param(mode_option, charp, 0444);
1300MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
1301
1302module_param(mtrr, int, 0444);
1303MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
1304
