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Linux 4.16.11
[linux/fpc-iii.git] / drivers / video / fbdev / aty / mach64_gx.c
blob27cb65fa2ba2a9cb3ccf0b4cd9d63d9f2313ea79
1 // SPDX-License-Identifier: GPL-2.0
2
3 /*
4 * ATI Mach64 GX Support
5 */
6
7 #include <linux/delay.h>
8 #include <linux/fb.h>
9
10 #include <asm/io.h>
11
12 #include <video/mach64.h>
13 #include "atyfb.h"
14
15 /* Definitions for the ICS 2595 == ATI 18818_1 Clockchip */
16
17 #define REF_FREQ_2595 1432 /* 14.33 MHz (exact 14.31818) */
18 #define REF_DIV_2595 46 /* really 43 on ICS 2595 !!! */
19 /* ohne Prescaler */
20 #define MAX_FREQ_2595 15938 /* 159.38 MHz (really 170.486) */
21 #define MIN_FREQ_2595 8000 /* 80.00 MHz ( 85.565) */
22 /* mit Prescaler 2, 4, 8 */
23 #define ABS_MIN_FREQ_2595 1000 /* 10.00 MHz (really 10.697) */
24 #define N_ADJ_2595 257
25
26 #define STOP_BITS_2595 0x1800
27
28
29 #define MIN_N_408 2
30
31 #define MIN_N_1703 6
32
33 #define MIN_M 2
34 #define MAX_M 30
35 #define MIN_N 35
36 #define MAX_N 255-8
37
38
39 /*
40 * Support Functions
41 */
42
43 static void aty_dac_waste4(const struct atyfb_par *par)
44 {
45 (void) aty_ld_8(DAC_REGS, par);
46
47 (void) aty_ld_8(DAC_REGS + 2, par);
48 (void) aty_ld_8(DAC_REGS + 2, par);
49 (void) aty_ld_8(DAC_REGS + 2, par);
50 (void) aty_ld_8(DAC_REGS + 2, par);
51 }
52
53 static void aty_StrobeClock(const struct atyfb_par *par)
54 {
55 u8 tmp;
56
57 udelay(26);
58
59 tmp = aty_ld_8(CLOCK_CNTL, par);
60 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, tmp | CLOCK_STROBE, par);
61 return;
62 }
63
64
65 /*
66 * IBM RGB514 DAC and Clock Chip
67 */
68
69 static void aty_st_514(int offset, u8 val, const struct atyfb_par *par)
70 {
71 aty_st_8(DAC_CNTL, 1, par);
72 /* right addr byte */
73 aty_st_8(DAC_W_INDEX, offset & 0xff, par);
74 /* left addr byte */
75 aty_st_8(DAC_DATA, (offset >> 8) & 0xff, par);
76 aty_st_8(DAC_MASK, val, par);
77 aty_st_8(DAC_CNTL, 0, par);
78 }
79
80 static int aty_set_dac_514(const struct fb_info *info,
81 const union aty_pll *pll, u32 bpp, u32 accel)
82 {
83 struct atyfb_par *par = (struct atyfb_par *) info->par;
84 static struct {
85 u8 pixel_dly;
86 u8 misc2_cntl;
87 u8 pixel_rep;
88 u8 pixel_cntl_index;
89 u8 pixel_cntl_v1;
90 } tab[3] = {
91 {
92 0, 0x41, 0x03, 0x71, 0x45}, /* 8 bpp */
93 {
94 0, 0x45, 0x04, 0x0c, 0x01}, /* 555 */
95 {
96 0, 0x45, 0x06, 0x0e, 0x00}, /* XRGB */
97 };
98 int i;
99
100 switch (bpp) {
101 case 8:
102 default:
103 i = 0;
104 break;
105 case 16:
106 i = 1;
107 break;
108 case 32:
109 i = 2;
110 break;
111 }
112 aty_st_514(0x90, 0x00, par); /* VRAM Mask Low */
113 aty_st_514(0x04, tab[i].pixel_dly, par); /* Horizontal Sync Control */
114 aty_st_514(0x05, 0x00, par); /* Power Management */
115 aty_st_514(0x02, 0x01, par); /* Misc Clock Control */
116 aty_st_514(0x71, tab[i].misc2_cntl, par); /* Misc Control 2 */
117 aty_st_514(0x0a, tab[i].pixel_rep, par); /* Pixel Format */
118 aty_st_514(tab[i].pixel_cntl_index, tab[i].pixel_cntl_v1, par);
119 /* Misc Control 2 / 16 BPP Control / 32 BPP Control */
120 return 0;
121 }
122
123 static int aty_var_to_pll_514(const struct fb_info *info, u32 vclk_per,
124 u32 bpp, union aty_pll *pll)
125 {
126 /*
127 * FIXME: use real calculations instead of using fixed values from the old
128 * driver
129 */
130 static struct {
131 u32 limit; /* pixlock rounding limit (arbitrary) */
132 u8 m; /* (df<<6) | vco_div_count */
133 u8 n; /* ref_div_count */
134 } RGB514_clocks[7] = {
135 {
136 8000, (3 << 6) | 20, 9}, /* 7395 ps / 135.2273 MHz */
137 {
138 10000, (1 << 6) | 19, 3}, /* 9977 ps / 100.2273 MHz */
139 {
140 13000, (1 << 6) | 2, 3}, /* 12509 ps / 79.9432 MHz */
141 {
142 14000, (2 << 6) | 8, 7}, /* 13394 ps / 74.6591 MHz */
143 {
144 16000, (1 << 6) | 44, 6}, /* 15378 ps / 65.0284 MHz */
145 {
146 25000, (1 << 6) | 15, 5}, /* 17460 ps / 57.2727 MHz */
147 {
148 50000, (0 << 6) | 53, 7}, /* 33145 ps / 30.1705 MHz */
149 };
150 int i;
151
152 for (i = 0; i < ARRAY_SIZE(RGB514_clocks); i++)
153 if (vclk_per <= RGB514_clocks[i].limit) {
154 pll->ibm514.m = RGB514_clocks[i].m;
155 pll->ibm514.n = RGB514_clocks[i].n;
156 return 0;
157 }
158 return -EINVAL;
159 }
160
161 static u32 aty_pll_514_to_var(const struct fb_info *info,
162 const union aty_pll *pll)
163 {
164 struct atyfb_par *par = (struct atyfb_par *) info->par;
165 u8 df, vco_div_count, ref_div_count;
166
167 df = pll->ibm514.m >> 6;
168 vco_div_count = pll->ibm514.m & 0x3f;
169 ref_div_count = pll->ibm514.n;
170
171 return ((par->ref_clk_per * ref_div_count) << (3 - df))/
172 (vco_div_count + 65);
173 }
174
175 static void aty_set_pll_514(const struct fb_info *info,
176 const union aty_pll *pll)
177 {
178 struct atyfb_par *par = (struct atyfb_par *) info->par;
179
180 aty_st_514(0x06, 0x02, par); /* DAC Operation */
181 aty_st_514(0x10, 0x01, par); /* PLL Control 1 */
182 aty_st_514(0x70, 0x01, par); /* Misc Control 1 */
183 aty_st_514(0x8f, 0x1f, par); /* PLL Ref. Divider Input */
184 aty_st_514(0x03, 0x00, par); /* Sync Control */
185 aty_st_514(0x05, 0x00, par); /* Power Management */
186 aty_st_514(0x20, pll->ibm514.m, par); /* F0 / M0 */
187 aty_st_514(0x21, pll->ibm514.n, par); /* F1 / N0 */
188 }
189
190 const struct aty_dac_ops aty_dac_ibm514 = {
191 .set_dac = aty_set_dac_514,
192 };
193
194 const struct aty_pll_ops aty_pll_ibm514 = {
195 .var_to_pll = aty_var_to_pll_514,
196 .pll_to_var = aty_pll_514_to_var,
197 .set_pll = aty_set_pll_514,
198 };
199
200
201 /*
202 * ATI 68860-B DAC
203 */
204
205 static int aty_set_dac_ATI68860_B(const struct fb_info *info,
206 const union aty_pll *pll, u32 bpp,
207 u32 accel)
208 {
209 struct atyfb_par *par = (struct atyfb_par *) info->par;
210 u32 gModeReg, devSetupRegA, temp, mask;
211
212 gModeReg = 0;
213 devSetupRegA = 0;
214
215 switch (bpp) {
216 case 8:
217 gModeReg = 0x83;
218 devSetupRegA =
219 0x60 | 0x00 /*(info->mach64DAC8Bit ? 0x00 : 0x01) */ ;
220 break;
221 case 15:
222 gModeReg = 0xA0;
223 devSetupRegA = 0x60;
224 break;
225 case 16:
226 gModeReg = 0xA1;
227 devSetupRegA = 0x60;
228 break;
229 case 24:
230 gModeReg = 0xC0;
231 devSetupRegA = 0x60;
232 break;
233 case 32:
234 gModeReg = 0xE3;
235 devSetupRegA = 0x60;
236 break;
237 }
238
239 if (!accel) {
240 gModeReg = 0x80;
241 devSetupRegA = 0x61;
242 }
243
244 temp = aty_ld_8(DAC_CNTL, par);
245 aty_st_8(DAC_CNTL, (temp & ~DAC_EXT_SEL_RS2) | DAC_EXT_SEL_RS3,
246 par);
247
248 aty_st_8(DAC_REGS + 2, 0x1D, par);
249 aty_st_8(DAC_REGS + 3, gModeReg, par);
250 aty_st_8(DAC_REGS, 0x02, par);
251
252 temp = aty_ld_8(DAC_CNTL, par);
253 aty_st_8(DAC_CNTL, temp | DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3, par);
254
255 if (info->fix.smem_len < ONE_MB)
256 mask = 0x04;
257 else if (info->fix.smem_len == ONE_MB)
258 mask = 0x08;
259 else
260 mask = 0x0C;
261
262 /* The following assumes that the BIOS has correctly set R7 of the
263 * Device Setup Register A at boot time.
264 */
265 #define A860_DELAY_L 0x80
266
267 temp = aty_ld_8(DAC_REGS, par);
268 aty_st_8(DAC_REGS, (devSetupRegA | mask) | (temp & A860_DELAY_L),
269 par);
270 temp = aty_ld_8(DAC_CNTL, par);
271 aty_st_8(DAC_CNTL, (temp & ~(DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3)),
272 par);
273
274 aty_st_le32(BUS_CNTL, 0x890e20f1, par);
275 aty_st_le32(DAC_CNTL, 0x47052100, par);
276 return 0;
277 }
278
279 const struct aty_dac_ops aty_dac_ati68860b = {
280 .set_dac = aty_set_dac_ATI68860_B,
281 };
282
283
284 /*
285 * AT&T 21C498 DAC
286 */
287
288 static int aty_set_dac_ATT21C498(const struct fb_info *info,
289 const union aty_pll *pll, u32 bpp,
290 u32 accel)
291 {
292 struct atyfb_par *par = (struct atyfb_par *) info->par;
293 u32 dotClock;
294 int muxmode = 0;
295 int DACMask = 0;
296
297 dotClock = 100000000 / pll->ics2595.period_in_ps;
298
299 switch (bpp) {
300 case 8:
301 if (dotClock > 8000) {
302 DACMask = 0x24;
303 muxmode = 1;
304 } else
305 DACMask = 0x04;
306 break;
307 case 15:
308 DACMask = 0x16;
309 break;
310 case 16:
311 DACMask = 0x36;
312 break;
313 case 24:
314 DACMask = 0xE6;
315 break;
316 case 32:
317 DACMask = 0xE6;
318 break;
319 }
320
321 if (1 /* info->mach64DAC8Bit */ )
322 DACMask |= 0x02;
323
324 aty_dac_waste4(par);
325 aty_st_8(DAC_REGS + 2, DACMask, par);
326
327 aty_st_le32(BUS_CNTL, 0x890e20f1, par);
328 aty_st_le32(DAC_CNTL, 0x00072000, par);
329 return muxmode;
330 }
331
332 const struct aty_dac_ops aty_dac_att21c498 = {
333 .set_dac = aty_set_dac_ATT21C498,
334 };
335
336
337 /*
338 * ATI 18818 / ICS 2595 Clock Chip
339 */
340
341 static int aty_var_to_pll_18818(const struct fb_info *info, u32 vclk_per,
342 u32 bpp, union aty_pll *pll)
343 {
344 u32 MHz100; /* in 0.01 MHz */
345 u32 program_bits;
346 u32 post_divider;
347
348 /* Calculate the programming word */
349 MHz100 = 100000000 / vclk_per;
350
351 program_bits = -1;
352 post_divider = 1;
353
354 if (MHz100 > MAX_FREQ_2595) {
355 MHz100 = MAX_FREQ_2595;
356 return -EINVAL;
357 } else if (MHz100 < ABS_MIN_FREQ_2595) {
358 program_bits = 0; /* MHz100 = 257 */
359 return -EINVAL;
360 } else {
361 while (MHz100 < MIN_FREQ_2595) {
362 MHz100 *= 2;
363 post_divider *= 2;
364 }
365 }
366 MHz100 *= 1000;
367 MHz100 = (REF_DIV_2595 * MHz100) / REF_FREQ_2595;
368
369 MHz100 += 500; /* + 0.5 round */
370 MHz100 /= 1000;
371
372 if (program_bits == -1) {
373 program_bits = MHz100 - N_ADJ_2595;
374 switch (post_divider) {
375 case 1:
376 program_bits |= 0x0600;
377 break;
378 case 2:
379 program_bits |= 0x0400;
380 break;
381 case 4:
382 program_bits |= 0x0200;
383 break;
384 case 8:
385 default:
386 break;
387 }
388 }
389
390 program_bits |= STOP_BITS_2595;
391
392 pll->ics2595.program_bits = program_bits;
393 pll->ics2595.locationAddr = 0;
394 pll->ics2595.post_divider = post_divider;
395 pll->ics2595.period_in_ps = vclk_per;
396
397 return 0;
398 }
399
400 static u32 aty_pll_18818_to_var(const struct fb_info *info,
401 const union aty_pll *pll)
402 {
403 return (pll->ics2595.period_in_ps); /* default for now */
404 }
405
406 static void aty_ICS2595_put1bit(u8 data, const struct atyfb_par *par)
407 {
408 u8 tmp;
409
410 data &= 0x01;
411 tmp = aty_ld_8(CLOCK_CNTL, par);
412 aty_st_8(CLOCK_CNTL + par->clk_wr_offset,
413 (tmp & ~0x04) | (data << 2), par);
414
415 tmp = aty_ld_8(CLOCK_CNTL, par);
416 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, (tmp & ~0x08) | (0 << 3),
417 par);
418
419 aty_StrobeClock(par);
420
421 tmp = aty_ld_8(CLOCK_CNTL, par);
422 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, (tmp & ~0x08) | (1 << 3),
423 par);
424
425 aty_StrobeClock(par);
426 return;
427 }
428
429 static void aty_set_pll18818(const struct fb_info *info,
430 const union aty_pll *pll)
431 {
432 struct atyfb_par *par = (struct atyfb_par *) info->par;
433 u32 program_bits;
434 u32 locationAddr;
435
436 u32 i;
437
438 u8 old_clock_cntl;
439 u8 old_crtc_ext_disp;
440
441 old_clock_cntl = aty_ld_8(CLOCK_CNTL, par);
442 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, 0, par);
443
444 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
445 aty_st_8(CRTC_GEN_CNTL + 3,
446 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
447
448 mdelay(15); /* delay for 50 (15) ms */
449
450 program_bits = pll->ics2595.program_bits;
451 locationAddr = pll->ics2595.locationAddr;
452
453 /* Program the clock chip */
454 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, 0, par); /* Strobe = 0 */
455 aty_StrobeClock(par);
456 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, 1, par); /* Strobe = 0 */
457 aty_StrobeClock(par);
458
459 aty_ICS2595_put1bit(1, par); /* Send start bits */
460 aty_ICS2595_put1bit(0, par); /* Start bit */
461 aty_ICS2595_put1bit(0, par); /* Read / ~Write */
462
463 for (i = 0; i < 5; i++) { /* Location 0..4 */
464 aty_ICS2595_put1bit(locationAddr & 1, par);
465 locationAddr >>= 1;
466 }
467
468 for (i = 0; i < 8 + 1 + 2 + 2; i++) {
469 aty_ICS2595_put1bit(program_bits & 1, par);
470 program_bits >>= 1;
471 }
472
473 mdelay(1); /* delay for 1 ms */
474
475 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
476 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
477 aty_st_8(CLOCK_CNTL + par->clk_wr_offset,
478 old_clock_cntl | CLOCK_STROBE, par);
479
480 mdelay(50); /* delay for 50 (15) ms */
481 aty_st_8(CLOCK_CNTL + par->clk_wr_offset,
482 ((pll->ics2595.locationAddr & 0x0F) | CLOCK_STROBE), par);
483 return;
484 }
485
486 const struct aty_pll_ops aty_pll_ati18818_1 = {
487 .var_to_pll = aty_var_to_pll_18818,
488 .pll_to_var = aty_pll_18818_to_var,
489 .set_pll = aty_set_pll18818,
490 };
491
492
493 /*
494 * STG 1703 Clock Chip
495 */
496
497 static int aty_var_to_pll_1703(const struct fb_info *info, u32 vclk_per,
498 u32 bpp, union aty_pll *pll)
499 {
500 u32 mhz100; /* in 0.01 MHz */
501 u32 program_bits;
502 /* u32 post_divider; */
503 u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
504 u32 temp, tempB;
505 u16 remainder, preRemainder;
506 short divider = 0, tempA;
507
508 /* Calculate the programming word */
509 mhz100 = 100000000 / vclk_per;
510 mach64MinFreq = MIN_FREQ_2595;
511 mach64MaxFreq = MAX_FREQ_2595;
512 mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
513
514 /* Calculate program word */
515 if (mhz100 == 0)
516 program_bits = 0xE0;
517 else {
518 if (mhz100 < mach64MinFreq)
519 mhz100 = mach64MinFreq;
520 if (mhz100 > mach64MaxFreq)
521 mhz100 = mach64MaxFreq;
522
523 divider = 0;
524 while (mhz100 < (mach64MinFreq << 3)) {
525 mhz100 <<= 1;
526 divider += 0x20;
527 }
528
529 temp = (unsigned int) (mhz100);
530 temp = (unsigned int) (temp * (MIN_N_1703 + 2));
531 temp -= (short) (mach64RefFreq << 1);
532
533 tempA = MIN_N_1703;
534 preRemainder = 0xffff;
535
536 do {
537 tempB = temp;
538 remainder = tempB % mach64RefFreq;
539 tempB = tempB / mach64RefFreq;
540
541 if ((tempB & 0xffff) <= 127
542 && (remainder <= preRemainder)) {
543 preRemainder = remainder;
544 divider &= ~0x1f;
545 divider |= tempA;
546 divider =
547 (divider & 0x00ff) +
548 ((tempB & 0xff) << 8);
549 }
550
551 temp += mhz100;
552 tempA++;
553 } while (tempA <= (MIN_N_1703 << 1));
554
555 program_bits = divider;
556 }
557
558 pll->ics2595.program_bits = program_bits;
559 pll->ics2595.locationAddr = 0;
560 pll->ics2595.post_divider = divider; /* fuer nix */
561 pll->ics2595.period_in_ps = vclk_per;
562
563 return 0;
564 }
565
566 static u32 aty_pll_1703_to_var(const struct fb_info *info,
567 const union aty_pll *pll)
568 {
569 return (pll->ics2595.period_in_ps); /* default for now */
570 }
571
572 static void aty_set_pll_1703(const struct fb_info *info,
573 const union aty_pll *pll)
574 {
575 struct atyfb_par *par = (struct atyfb_par *) info->par;
576 u32 program_bits;
577 u32 locationAddr;
578
579 char old_crtc_ext_disp;
580
581 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
582 aty_st_8(CRTC_GEN_CNTL + 3,
583 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
584
585 program_bits = pll->ics2595.program_bits;
586 locationAddr = pll->ics2595.locationAddr;
587
588 /* Program clock */
589 aty_dac_waste4(par);
590
591 (void) aty_ld_8(DAC_REGS + 2, par);
592 aty_st_8(DAC_REGS + 2, (locationAddr << 1) + 0x20, par);
593 aty_st_8(DAC_REGS + 2, 0, par);
594 aty_st_8(DAC_REGS + 2, (program_bits & 0xFF00) >> 8, par);
595 aty_st_8(DAC_REGS + 2, (program_bits & 0xFF), par);
596
597 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
598 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
599 return;
600 }
601
602 const struct aty_pll_ops aty_pll_stg1703 = {
603 .var_to_pll = aty_var_to_pll_1703,
604 .pll_to_var = aty_pll_1703_to_var,
605 .set_pll = aty_set_pll_1703,
606 };
607
608
609 /*
610 * Chrontel 8398 Clock Chip
611 */
612
613 static int aty_var_to_pll_8398(const struct fb_info *info, u32 vclk_per,
614 u32 bpp, union aty_pll *pll)
615 {
616 u32 tempA, tempB, fOut, longMHz100, diff, preDiff;
617
618 u32 mhz100; /* in 0.01 MHz */
619 u32 program_bits;
620 /* u32 post_divider; */
621 u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
622 u16 m, n, k = 0, save_m, save_n, twoToKth;
623
624 /* Calculate the programming word */
625 mhz100 = 100000000 / vclk_per;
626 mach64MinFreq = MIN_FREQ_2595;
627 mach64MaxFreq = MAX_FREQ_2595;
628 mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
629
630 save_m = 0;
631 save_n = 0;
632
633 /* Calculate program word */
634 if (mhz100 == 0)
635 program_bits = 0xE0;
636 else {
637 if (mhz100 < mach64MinFreq)
638 mhz100 = mach64MinFreq;
639 if (mhz100 > mach64MaxFreq)
640 mhz100 = mach64MaxFreq;
641
642 longMHz100 = mhz100 * 256 / 100; /* 8 bit scale this */
643
644 while (mhz100 < (mach64MinFreq << 3)) {
645 mhz100 <<= 1;
646 k++;
647 }
648
649 twoToKth = 1 << k;
650 diff = 0;
651 preDiff = 0xFFFFFFFF;
652
653 for (m = MIN_M; m <= MAX_M; m++) {
654 for (n = MIN_N; n <= MAX_N; n++) {
655 tempA = 938356; /* 14.31818 * 65536 */
656 tempA *= (n + 8); /* 43..256 */
657 tempB = twoToKth * 256;
658 tempB *= (m + 2); /* 4..32 */
659 fOut = tempA / tempB; /* 8 bit scale */
660
661 if (longMHz100 > fOut)
662 diff = longMHz100 - fOut;
663 else
664 diff = fOut - longMHz100;
665
666 if (diff < preDiff) {
667 save_m = m;
668 save_n = n;
669 preDiff = diff;
670 }
671 }
672 }
673
674 program_bits = (k << 6) + (save_m) + (save_n << 8);
675 }
676
677 pll->ics2595.program_bits = program_bits;
678 pll->ics2595.locationAddr = 0;
679 pll->ics2595.post_divider = 0;
680 pll->ics2595.period_in_ps = vclk_per;
681
682 return 0;
683 }
684
685 static u32 aty_pll_8398_to_var(const struct fb_info *info,
686 const union aty_pll *pll)
687 {
688 return (pll->ics2595.period_in_ps); /* default for now */
689 }
690
691 static void aty_set_pll_8398(const struct fb_info *info,
692 const union aty_pll *pll)
693 {
694 struct atyfb_par *par = (struct atyfb_par *) info->par;
695 u32 program_bits;
696 u32 locationAddr;
697
698 char old_crtc_ext_disp;
699 char tmp;
700
701 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
702 aty_st_8(CRTC_GEN_CNTL + 3,
703 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
704
705 program_bits = pll->ics2595.program_bits;
706 locationAddr = pll->ics2595.locationAddr;
707
708 /* Program clock */
709 tmp = aty_ld_8(DAC_CNTL, par);
710 aty_st_8(DAC_CNTL, tmp | DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3, par);
711
712 aty_st_8(DAC_REGS, locationAddr, par);
713 aty_st_8(DAC_REGS + 1, (program_bits & 0xff00) >> 8, par);
714 aty_st_8(DAC_REGS + 1, (program_bits & 0xff), par);
715
716 tmp = aty_ld_8(DAC_CNTL, par);
717 aty_st_8(DAC_CNTL, (tmp & ~DAC_EXT_SEL_RS2) | DAC_EXT_SEL_RS3,
718 par);
719
720 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
721 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
722
723 return;
724 }
725
726 const struct aty_pll_ops aty_pll_ch8398 = {
727 .var_to_pll = aty_var_to_pll_8398,
728 .pll_to_var = aty_pll_8398_to_var,
729 .set_pll = aty_set_pll_8398,
730 };
731
732
733 /*
734 * AT&T 20C408 Clock Chip
735 */
736
737 static int aty_var_to_pll_408(const struct fb_info *info, u32 vclk_per,
738 u32 bpp, union aty_pll *pll)
739 {
740 u32 mhz100; /* in 0.01 MHz */
741 u32 program_bits;
742 /* u32 post_divider; */
743 u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
744 u32 temp, tempB;
745 u16 remainder, preRemainder;
746 short divider = 0, tempA;
747
748 /* Calculate the programming word */
749 mhz100 = 100000000 / vclk_per;
750 mach64MinFreq = MIN_FREQ_2595;
751 mach64MaxFreq = MAX_FREQ_2595;
752 mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
753
754 /* Calculate program word */
755 if (mhz100 == 0)
756 program_bits = 0xFF;
757 else {
758 if (mhz100 < mach64MinFreq)
759 mhz100 = mach64MinFreq;
760 if (mhz100 > mach64MaxFreq)
761 mhz100 = mach64MaxFreq;
762
763 while (mhz100 < (mach64MinFreq << 3)) {
764 mhz100 <<= 1;
765 divider += 0x40;
766 }
767
768 temp = (unsigned int) mhz100;
769 temp = (unsigned int) (temp * (MIN_N_408 + 2));
770 temp -= ((short) (mach64RefFreq << 1));
771
772 tempA = MIN_N_408;
773 preRemainder = 0xFFFF;
774
775 do {
776 tempB = temp;
777 remainder = tempB % mach64RefFreq;
778 tempB = tempB / mach64RefFreq;
779 if (((tempB & 0xFFFF) <= 255)
780 && (remainder <= preRemainder)) {
781 preRemainder = remainder;
782 divider &= ~0x3f;
783 divider |= tempA;
784 divider =
785 (divider & 0x00FF) +
786 ((tempB & 0xFF) << 8);
787 }
788 temp += mhz100;
789 tempA++;
790 } while (tempA <= 32);
791
792 program_bits = divider;
793 }
794
795 pll->ics2595.program_bits = program_bits;
796 pll->ics2595.locationAddr = 0;
797 pll->ics2595.post_divider = divider; /* fuer nix */
798 pll->ics2595.period_in_ps = vclk_per;
799
800 return 0;
801 }
802
803 static u32 aty_pll_408_to_var(const struct fb_info *info,
804 const union aty_pll *pll)
805 {
806 return (pll->ics2595.period_in_ps); /* default for now */
807 }
808
809 static void aty_set_pll_408(const struct fb_info *info,
810 const union aty_pll *pll)
811 {
812 struct atyfb_par *par = (struct atyfb_par *) info->par;
813 u32 program_bits;
814 u32 locationAddr;
815
816 u8 tmpA, tmpB, tmpC;
817 char old_crtc_ext_disp;
818
819 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
820 aty_st_8(CRTC_GEN_CNTL + 3,
821 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
822
823 program_bits = pll->ics2595.program_bits;
824 locationAddr = pll->ics2595.locationAddr;
825
826 /* Program clock */
827 aty_dac_waste4(par);
828 tmpB = aty_ld_8(DAC_REGS + 2, par) | 1;
829 aty_dac_waste4(par);
830 aty_st_8(DAC_REGS + 2, tmpB, par);
831
832 tmpA = tmpB;
833 tmpC = tmpA;
834 tmpA |= 8;
835 tmpB = 1;
836
837 aty_st_8(DAC_REGS, tmpB, par);
838 aty_st_8(DAC_REGS + 2, tmpA, par);
839
840 udelay(400); /* delay for 400 us */
841
842 locationAddr = (locationAddr << 2) + 0x40;
843 tmpB = locationAddr;
844 tmpA = program_bits >> 8;
845
846 aty_st_8(DAC_REGS, tmpB, par);
847 aty_st_8(DAC_REGS + 2, tmpA, par);
848
849 tmpB = locationAddr + 1;
850 tmpA = (u8) program_bits;
851
852 aty_st_8(DAC_REGS, tmpB, par);
853 aty_st_8(DAC_REGS + 2, tmpA, par);
854
855 tmpB = locationAddr + 2;
856 tmpA = 0x77;
857
858 aty_st_8(DAC_REGS, tmpB, par);
859 aty_st_8(DAC_REGS + 2, tmpA, par);
860
861 udelay(400); /* delay for 400 us */
862 tmpA = tmpC & (~(1 | 8));
863 tmpB = 1;
864
865 aty_st_8(DAC_REGS, tmpB, par);
866 aty_st_8(DAC_REGS + 2, tmpA, par);
867
868 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
869 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
870 return;
871 }
872
873 const struct aty_pll_ops aty_pll_att20c408 = {
874 .var_to_pll = aty_var_to_pll_408,
875 .pll_to_var = aty_pll_408_to_var,
876 .set_pll = aty_set_pll_408,
877 };
878
879
880 /*
881 * Unsupported DAC and Clock Chip
882 */
883
884 static int aty_set_dac_unsupported(const struct fb_info *info,
885 const union aty_pll *pll, u32 bpp,
886 u32 accel)
887 {
888 struct atyfb_par *par = (struct atyfb_par *) info->par;
889
890 aty_st_le32(BUS_CNTL, 0x890e20f1, par);
891 aty_st_le32(DAC_CNTL, 0x47052100, par);
892 /* new in 2.2.3p1 from Geert. ???????? */
893 aty_st_le32(BUS_CNTL, 0x590e10ff, par);
894 aty_st_le32(DAC_CNTL, 0x47012100, par);
895 return 0;
896 }
897
898 static int dummy(void)
899 {
900 return 0;
901 }
902
903 const struct aty_dac_ops aty_dac_unsupported = {
904 .set_dac = aty_set_dac_unsupported,
905 };
906
907 const struct aty_pll_ops aty_pll_unsupported = {
908 .var_to_pll = (void *) dummy,
909 .pll_to_var = (void *) dummy,
910 .set_pll = (void *) dummy,
911 };
Linux with added FPC-III support