3 * ATI Mach64 GX Support
6 #include <linux/delay.h>
11 #include <video/mach64.h>
14 /* Definitions for the ICS 2595 == ATI 18818_1 Clockchip */
16 #define REF_FREQ_2595 1432 /* 14.33 MHz (exact 14.31818) */
17 #define REF_DIV_2595 46 /* really 43 on ICS 2595 !!! */
19 #define MAX_FREQ_2595 15938 /* 159.38 MHz (really 170.486) */
20 #define MIN_FREQ_2595 8000 /* 80.00 MHz ( 85.565) */
21 /* mit Prescaler 2, 4, 8 */
22 #define ABS_MIN_FREQ_2595 1000 /* 10.00 MHz (really 10.697) */
23 #define N_ADJ_2595 257
25 #define STOP_BITS_2595 0x1800
42 static void aty_dac_waste4(const struct atyfb_par *par)
44 (void) aty_ld_8(DAC_REGS, par);
46 (void) aty_ld_8(DAC_REGS + 2, par);
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);
52 static void aty_StrobeClock(const struct atyfb_par *par)
58 tmp = aty_ld_8(CLOCK_CNTL, par);
59 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, tmp | CLOCK_STROBE, par);
65 * IBM RGB514 DAC and Clock Chip
68 static void aty_st_514(int offset, u8 val, const struct atyfb_par *par)
70 aty_st_8(DAC_CNTL, 1, par);
72 aty_st_8(DAC_W_INDEX, offset & 0xff, par);
74 aty_st_8(DAC_DATA, (offset >> 8) & 0xff, par);
75 aty_st_8(DAC_MASK, val, par);
76 aty_st_8(DAC_CNTL, 0, par);
79 static int aty_set_dac_514(const struct fb_info *info,
80 const union aty_pll *pll, u32 bpp, u32 accel)
82 struct atyfb_par *par = (struct atyfb_par *) info->par;
91 0, 0x41, 0x03, 0x71, 0x45}, /* 8 bpp */
93 0, 0x45, 0x04, 0x0c, 0x01}, /* 555 */
95 0, 0x45, 0x06, 0x0e, 0x00}, /* XRGB */
111 aty_st_514(0x90, 0x00, par); /* VRAM Mask Low */
112 aty_st_514(0x04, tab[i].pixel_dly, par); /* Horizontal Sync Control */
113 aty_st_514(0x05, 0x00, par); /* Power Management */
114 aty_st_514(0x02, 0x01, par); /* Misc Clock Control */
115 aty_st_514(0x71, tab[i].misc2_cntl, par); /* Misc Control 2 */
116 aty_st_514(0x0a, tab[i].pixel_rep, par); /* Pixel Format */
117 aty_st_514(tab[i].pixel_cntl_index, tab[i].pixel_cntl_v1, par);
118 /* Misc Control 2 / 16 BPP Control / 32 BPP Control */
122 static int aty_var_to_pll_514(const struct fb_info *info, u32 vclk_per,
123 u32 bpp, union aty_pll *pll)
126 * FIXME: use real calculations instead of using fixed values from the old
130 u32 limit; /* pixlock rounding limit (arbitrary) */
131 u8 m; /* (df<<6) | vco_div_count */
132 u8 n; /* ref_div_count */
133 } RGB514_clocks[7] = {
135 8000, (3 << 6) | 20, 9}, /* 7395 ps / 135.2273 MHz */
137 10000, (1 << 6) | 19, 3}, /* 9977 ps / 100.2273 MHz */
139 13000, (1 << 6) | 2, 3}, /* 12509 ps / 79.9432 MHz */
141 14000, (2 << 6) | 8, 7}, /* 13394 ps / 74.6591 MHz */
143 16000, (1 << 6) | 44, 6}, /* 15378 ps / 65.0284 MHz */
145 25000, (1 << 6) | 15, 5}, /* 17460 ps / 57.2727 MHz */
147 50000, (0 << 6) | 53, 7}, /* 33145 ps / 30.1705 MHz */
151 for (i = 0; i < ARRAY_SIZE(RGB514_clocks); i++)
152 if (vclk_per <= RGB514_clocks[i].limit) {
153 pll->ibm514.m = RGB514_clocks[i].m;
154 pll->ibm514.n = RGB514_clocks[i].n;
160 static u32 aty_pll_514_to_var(const struct fb_info *info,
161 const union aty_pll *pll)
163 struct atyfb_par *par = (struct atyfb_par *) info->par;
164 u8 df, vco_div_count, ref_div_count;
166 df = pll->ibm514.m >> 6;
167 vco_div_count = pll->ibm514.m & 0x3f;
168 ref_div_count = pll->ibm514.n;
170 return ((par->ref_clk_per * ref_div_count) << (3 - df))/
171 (vco_div_count + 65);
174 static void aty_set_pll_514(const struct fb_info *info,
175 const union aty_pll *pll)
177 struct atyfb_par *par = (struct atyfb_par *) info->par;
179 aty_st_514(0x06, 0x02, par); /* DAC Operation */
180 aty_st_514(0x10, 0x01, par); /* PLL Control 1 */
181 aty_st_514(0x70, 0x01, par); /* Misc Control 1 */
182 aty_st_514(0x8f, 0x1f, par); /* PLL Ref. Divider Input */
183 aty_st_514(0x03, 0x00, par); /* Sync Control */
184 aty_st_514(0x05, 0x00, par); /* Power Management */
185 aty_st_514(0x20, pll->ibm514.m, par); /* F0 / M0 */
186 aty_st_514(0x21, pll->ibm514.n, par); /* F1 / N0 */
189 const struct aty_dac_ops aty_dac_ibm514 = {
190 .set_dac = aty_set_dac_514,
193 const struct aty_pll_ops aty_pll_ibm514 = {
194 .var_to_pll = aty_var_to_pll_514,
195 .pll_to_var = aty_pll_514_to_var,
196 .set_pll = aty_set_pll_514,
204 static int aty_set_dac_ATI68860_B(const struct fb_info *info,
205 const union aty_pll *pll, u32 bpp,
208 struct atyfb_par *par = (struct atyfb_par *) info->par;
209 u32 gModeReg, devSetupRegA, temp, mask;
218 0x60 | 0x00 /*(info->mach64DAC8Bit ? 0x00 : 0x01) */ ;
243 temp = aty_ld_8(DAC_CNTL, par);
244 aty_st_8(DAC_CNTL, (temp & ~DAC_EXT_SEL_RS2) | DAC_EXT_SEL_RS3,
247 aty_st_8(DAC_REGS + 2, 0x1D, par);
248 aty_st_8(DAC_REGS + 3, gModeReg, par);
249 aty_st_8(DAC_REGS, 0x02, par);
251 temp = aty_ld_8(DAC_CNTL, par);
252 aty_st_8(DAC_CNTL, temp | DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3, par);
254 if (info->fix.smem_len < ONE_MB)
256 else if (info->fix.smem_len == ONE_MB)
261 /* The following assumes that the BIOS has correctly set R7 of the
262 * Device Setup Register A at boot time.
264 #define A860_DELAY_L 0x80
266 temp = aty_ld_8(DAC_REGS, par);
267 aty_st_8(DAC_REGS, (devSetupRegA | mask) | (temp & A860_DELAY_L),
269 temp = aty_ld_8(DAC_CNTL, par);
270 aty_st_8(DAC_CNTL, (temp & ~(DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3)),
273 aty_st_le32(BUS_CNTL, 0x890e20f1, par);
274 aty_st_le32(DAC_CNTL, 0x47052100, par);
278 const struct aty_dac_ops aty_dac_ati68860b = {
279 .set_dac = aty_set_dac_ATI68860_B,
287 static int aty_set_dac_ATT21C498(const struct fb_info *info,
288 const union aty_pll *pll, u32 bpp,
291 struct atyfb_par *par = (struct atyfb_par *) info->par;
296 dotClock = 100000000 / pll->ics2595.period_in_ps;
300 if (dotClock > 8000) {
320 if (1 /* info->mach64DAC8Bit */ )
324 aty_st_8(DAC_REGS + 2, DACMask, par);
326 aty_st_le32(BUS_CNTL, 0x890e20f1, par);
327 aty_st_le32(DAC_CNTL, 0x00072000, par);
331 const struct aty_dac_ops aty_dac_att21c498 = {
332 .set_dac = aty_set_dac_ATT21C498,
337 * ATI 18818 / ICS 2595 Clock Chip
340 static int aty_var_to_pll_18818(const struct fb_info *info, u32 vclk_per,
341 u32 bpp, union aty_pll *pll)
343 u32 MHz100; /* in 0.01 MHz */
347 /* Calculate the programming word */
348 MHz100 = 100000000 / vclk_per;
353 if (MHz100 > MAX_FREQ_2595) {
354 MHz100 = MAX_FREQ_2595;
356 } else if (MHz100 < ABS_MIN_FREQ_2595) {
357 program_bits = 0; /* MHz100 = 257 */
360 while (MHz100 < MIN_FREQ_2595) {
366 MHz100 = (REF_DIV_2595 * MHz100) / REF_FREQ_2595;
368 MHz100 += 500; /* + 0.5 round */
371 if (program_bits == -1) {
372 program_bits = MHz100 - N_ADJ_2595;
373 switch (post_divider) {
375 program_bits |= 0x0600;
378 program_bits |= 0x0400;
381 program_bits |= 0x0200;
389 program_bits |= STOP_BITS_2595;
391 pll->ics2595.program_bits = program_bits;
392 pll->ics2595.locationAddr = 0;
393 pll->ics2595.post_divider = post_divider;
394 pll->ics2595.period_in_ps = vclk_per;
399 static u32 aty_pll_18818_to_var(const struct fb_info *info,
400 const union aty_pll *pll)
402 return (pll->ics2595.period_in_ps); /* default for now */
405 static void aty_ICS2595_put1bit(u8 data, const struct atyfb_par *par)
410 tmp = aty_ld_8(CLOCK_CNTL, par);
411 aty_st_8(CLOCK_CNTL + par->clk_wr_offset,
412 (tmp & ~0x04) | (data << 2), par);
414 tmp = aty_ld_8(CLOCK_CNTL, par);
415 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, (tmp & ~0x08) | (0 << 3),
418 aty_StrobeClock(par);
420 tmp = aty_ld_8(CLOCK_CNTL, par);
421 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, (tmp & ~0x08) | (1 << 3),
424 aty_StrobeClock(par);
428 static void aty_set_pll18818(const struct fb_info *info,
429 const union aty_pll *pll)
431 struct atyfb_par *par = (struct atyfb_par *) info->par;
438 u8 old_crtc_ext_disp;
440 old_clock_cntl = aty_ld_8(CLOCK_CNTL, par);
441 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, 0, par);
443 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
444 aty_st_8(CRTC_GEN_CNTL + 3,
445 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
447 mdelay(15); /* delay for 50 (15) ms */
449 program_bits = pll->ics2595.program_bits;
450 locationAddr = pll->ics2595.locationAddr;
452 /* Program the clock chip */
453 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, 0, par); /* Strobe = 0 */
454 aty_StrobeClock(par);
455 aty_st_8(CLOCK_CNTL + par->clk_wr_offset, 1, par); /* Strobe = 0 */
456 aty_StrobeClock(par);
458 aty_ICS2595_put1bit(1, par); /* Send start bits */
459 aty_ICS2595_put1bit(0, par); /* Start bit */
460 aty_ICS2595_put1bit(0, par); /* Read / ~Write */
462 for (i = 0; i < 5; i++) { /* Location 0..4 */
463 aty_ICS2595_put1bit(locationAddr & 1, par);
467 for (i = 0; i < 8 + 1 + 2 + 2; i++) {
468 aty_ICS2595_put1bit(program_bits & 1, par);
472 mdelay(1); /* delay for 1 ms */
474 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
475 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
476 aty_st_8(CLOCK_CNTL + par->clk_wr_offset,
477 old_clock_cntl | CLOCK_STROBE, par);
479 mdelay(50); /* delay for 50 (15) ms */
480 aty_st_8(CLOCK_CNTL + par->clk_wr_offset,
481 ((pll->ics2595.locationAddr & 0x0F) | CLOCK_STROBE), par);
485 const struct aty_pll_ops aty_pll_ati18818_1 = {
486 .var_to_pll = aty_var_to_pll_18818,
487 .pll_to_var = aty_pll_18818_to_var,
488 .set_pll = aty_set_pll18818,
493 * STG 1703 Clock Chip
496 static int aty_var_to_pll_1703(const struct fb_info *info, u32 vclk_per,
497 u32 bpp, union aty_pll *pll)
499 u32 mhz100; /* in 0.01 MHz */
501 /* u32 post_divider; */
502 u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
504 u16 remainder, preRemainder;
505 short divider = 0, tempA;
507 /* Calculate the programming word */
508 mhz100 = 100000000 / vclk_per;
509 mach64MinFreq = MIN_FREQ_2595;
510 mach64MaxFreq = MAX_FREQ_2595;
511 mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
513 /* Calculate program word */
517 if (mhz100 < mach64MinFreq)
518 mhz100 = mach64MinFreq;
519 if (mhz100 > mach64MaxFreq)
520 mhz100 = mach64MaxFreq;
523 while (mhz100 < (mach64MinFreq << 3)) {
528 temp = (unsigned int) (mhz100);
529 temp = (unsigned int) (temp * (MIN_N_1703 + 2));
530 temp -= (short) (mach64RefFreq << 1);
533 preRemainder = 0xffff;
537 remainder = tempB % mach64RefFreq;
538 tempB = tempB / mach64RefFreq;
540 if ((tempB & 0xffff) <= 127
541 && (remainder <= preRemainder)) {
542 preRemainder = remainder;
547 ((tempB & 0xff) << 8);
552 } while (tempA <= (MIN_N_1703 << 1));
554 program_bits = divider;
557 pll->ics2595.program_bits = program_bits;
558 pll->ics2595.locationAddr = 0;
559 pll->ics2595.post_divider = divider; /* fuer nix */
560 pll->ics2595.period_in_ps = vclk_per;
565 static u32 aty_pll_1703_to_var(const struct fb_info *info,
566 const union aty_pll *pll)
568 return (pll->ics2595.period_in_ps); /* default for now */
571 static void aty_set_pll_1703(const struct fb_info *info,
572 const union aty_pll *pll)
574 struct atyfb_par *par = (struct atyfb_par *) info->par;
578 char old_crtc_ext_disp;
580 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
581 aty_st_8(CRTC_GEN_CNTL + 3,
582 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
584 program_bits = pll->ics2595.program_bits;
585 locationAddr = pll->ics2595.locationAddr;
590 (void) aty_ld_8(DAC_REGS + 2, par);
591 aty_st_8(DAC_REGS + 2, (locationAddr << 1) + 0x20, par);
592 aty_st_8(DAC_REGS + 2, 0, par);
593 aty_st_8(DAC_REGS + 2, (program_bits & 0xFF00) >> 8, par);
594 aty_st_8(DAC_REGS + 2, (program_bits & 0xFF), par);
596 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
597 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
601 const struct aty_pll_ops aty_pll_stg1703 = {
602 .var_to_pll = aty_var_to_pll_1703,
603 .pll_to_var = aty_pll_1703_to_var,
604 .set_pll = aty_set_pll_1703,
609 * Chrontel 8398 Clock Chip
612 static int aty_var_to_pll_8398(const struct fb_info *info, u32 vclk_per,
613 u32 bpp, union aty_pll *pll)
615 u32 tempA, tempB, fOut, longMHz100, diff, preDiff;
617 u32 mhz100; /* in 0.01 MHz */
619 /* u32 post_divider; */
620 u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
621 u16 m, n, k = 0, save_m, save_n, twoToKth;
623 /* Calculate the programming word */
624 mhz100 = 100000000 / vclk_per;
625 mach64MinFreq = MIN_FREQ_2595;
626 mach64MaxFreq = MAX_FREQ_2595;
627 mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
632 /* Calculate program word */
636 if (mhz100 < mach64MinFreq)
637 mhz100 = mach64MinFreq;
638 if (mhz100 > mach64MaxFreq)
639 mhz100 = mach64MaxFreq;
641 longMHz100 = mhz100 * 256 / 100; /* 8 bit scale this */
643 while (mhz100 < (mach64MinFreq << 3)) {
650 preDiff = 0xFFFFFFFF;
652 for (m = MIN_M; m <= MAX_M; m++) {
653 for (n = MIN_N; n <= MAX_N; n++) {
654 tempA = 938356; /* 14.31818 * 65536 */
655 tempA *= (n + 8); /* 43..256 */
656 tempB = twoToKth * 256;
657 tempB *= (m + 2); /* 4..32 */
658 fOut = tempA / tempB; /* 8 bit scale */
660 if (longMHz100 > fOut)
661 diff = longMHz100 - fOut;
663 diff = fOut - longMHz100;
665 if (diff < preDiff) {
673 program_bits = (k << 6) + (save_m) + (save_n << 8);
676 pll->ics2595.program_bits = program_bits;
677 pll->ics2595.locationAddr = 0;
678 pll->ics2595.post_divider = 0;
679 pll->ics2595.period_in_ps = vclk_per;
684 static u32 aty_pll_8398_to_var(const struct fb_info *info,
685 const union aty_pll *pll)
687 return (pll->ics2595.period_in_ps); /* default for now */
690 static void aty_set_pll_8398(const struct fb_info *info,
691 const union aty_pll *pll)
693 struct atyfb_par *par = (struct atyfb_par *) info->par;
697 char old_crtc_ext_disp;
700 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
701 aty_st_8(CRTC_GEN_CNTL + 3,
702 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
704 program_bits = pll->ics2595.program_bits;
705 locationAddr = pll->ics2595.locationAddr;
708 tmp = aty_ld_8(DAC_CNTL, par);
709 aty_st_8(DAC_CNTL, tmp | DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3, par);
711 aty_st_8(DAC_REGS, locationAddr, par);
712 aty_st_8(DAC_REGS + 1, (program_bits & 0xff00) >> 8, par);
713 aty_st_8(DAC_REGS + 1, (program_bits & 0xff), par);
715 tmp = aty_ld_8(DAC_CNTL, par);
716 aty_st_8(DAC_CNTL, (tmp & ~DAC_EXT_SEL_RS2) | DAC_EXT_SEL_RS3,
719 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
720 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
725 const struct aty_pll_ops aty_pll_ch8398 = {
726 .var_to_pll = aty_var_to_pll_8398,
727 .pll_to_var = aty_pll_8398_to_var,
728 .set_pll = aty_set_pll_8398,
733 * AT&T 20C408 Clock Chip
736 static int aty_var_to_pll_408(const struct fb_info *info, u32 vclk_per,
737 u32 bpp, union aty_pll *pll)
739 u32 mhz100; /* in 0.01 MHz */
741 /* u32 post_divider; */
742 u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
744 u16 remainder, preRemainder;
745 short divider = 0, tempA;
747 /* Calculate the programming word */
748 mhz100 = 100000000 / vclk_per;
749 mach64MinFreq = MIN_FREQ_2595;
750 mach64MaxFreq = MAX_FREQ_2595;
751 mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
753 /* Calculate program word */
757 if (mhz100 < mach64MinFreq)
758 mhz100 = mach64MinFreq;
759 if (mhz100 > mach64MaxFreq)
760 mhz100 = mach64MaxFreq;
762 while (mhz100 < (mach64MinFreq << 3)) {
767 temp = (unsigned int) mhz100;
768 temp = (unsigned int) (temp * (MIN_N_408 + 2));
769 temp -= ((short) (mach64RefFreq << 1));
772 preRemainder = 0xFFFF;
776 remainder = tempB % mach64RefFreq;
777 tempB = tempB / mach64RefFreq;
778 if (((tempB & 0xFFFF) <= 255)
779 && (remainder <= preRemainder)) {
780 preRemainder = remainder;
785 ((tempB & 0xFF) << 8);
789 } while (tempA <= 32);
791 program_bits = divider;
794 pll->ics2595.program_bits = program_bits;
795 pll->ics2595.locationAddr = 0;
796 pll->ics2595.post_divider = divider; /* fuer nix */
797 pll->ics2595.period_in_ps = vclk_per;
802 static u32 aty_pll_408_to_var(const struct fb_info *info,
803 const union aty_pll *pll)
805 return (pll->ics2595.period_in_ps); /* default for now */
808 static void aty_set_pll_408(const struct fb_info *info,
809 const union aty_pll *pll)
811 struct atyfb_par *par = (struct atyfb_par *) info->par;
816 char old_crtc_ext_disp;
818 old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, par);
819 aty_st_8(CRTC_GEN_CNTL + 3,
820 old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24), par);
822 program_bits = pll->ics2595.program_bits;
823 locationAddr = pll->ics2595.locationAddr;
827 tmpB = aty_ld_8(DAC_REGS + 2, par) | 1;
829 aty_st_8(DAC_REGS + 2, tmpB, par);
836 aty_st_8(DAC_REGS, tmpB, par);
837 aty_st_8(DAC_REGS + 2, tmpA, par);
839 udelay(400); /* delay for 400 us */
841 locationAddr = (locationAddr << 2) + 0x40;
843 tmpA = program_bits >> 8;
845 aty_st_8(DAC_REGS, tmpB, par);
846 aty_st_8(DAC_REGS + 2, tmpA, par);
848 tmpB = locationAddr + 1;
849 tmpA = (u8) program_bits;
851 aty_st_8(DAC_REGS, tmpB, par);
852 aty_st_8(DAC_REGS + 2, tmpA, par);
854 tmpB = locationAddr + 2;
857 aty_st_8(DAC_REGS, tmpB, par);
858 aty_st_8(DAC_REGS + 2, tmpA, par);
860 udelay(400); /* delay for 400 us */
861 tmpA = tmpC & (~(1 | 8));
864 aty_st_8(DAC_REGS, tmpB, par);
865 aty_st_8(DAC_REGS + 2, tmpA, par);
867 (void) aty_ld_8(DAC_REGS, par); /* Clear DAC Counter */
868 aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, par);
872 const struct aty_pll_ops aty_pll_att20c408 = {
873 .var_to_pll = aty_var_to_pll_408,
874 .pll_to_var = aty_pll_408_to_var,
875 .set_pll = aty_set_pll_408,
880 * Unsupported DAC and Clock Chip
883 static int aty_set_dac_unsupported(const struct fb_info *info,
884 const union aty_pll *pll, u32 bpp,
887 struct atyfb_par *par = (struct atyfb_par *) info->par;
889 aty_st_le32(BUS_CNTL, 0x890e20f1, par);
890 aty_st_le32(DAC_CNTL, 0x47052100, par);
891 /* new in 2.2.3p1 from Geert. ???????? */
892 aty_st_le32(BUS_CNTL, 0x590e10ff, par);
893 aty_st_le32(DAC_CNTL, 0x47012100, par);
897 static int dummy(void)
902 const struct aty_dac_ops aty_dac_unsupported = {
903 .set_dac = aty_set_dac_unsupported,
906 const struct aty_pll_ops aty_pll_unsupported = {
907 .var_to_pll = (void *) dummy,
908 .pll_to_var = (void *) dummy,
909 .set_pll = (void *) dummy,