diff options
Diffstat (limited to 'usr.sbin/pcvt/set2061/ICD2061Aalt.c')
| -rw-r--r-- | usr.sbin/pcvt/set2061/ICD2061Aalt.c | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/usr.sbin/pcvt/set2061/ICD2061Aalt.c b/usr.sbin/pcvt/set2061/ICD2061Aalt.c deleted file mode 100644 index a74ec4e..0000000 --- a/usr.sbin/pcvt/set2061/ICD2061Aalt.c +++ /dev/null @@ -1,297 +0,0 @@ -/* - * This code is derived from code available from the STB bulletin board - */ - -/* $XFree86: mit/server/ddx/x386/common_hw/ICD2061Aalt.c,v 2.6 1994/04/15 05:10:30 dawes Exp $ */ - -#ifndef KERNEL -#include "compiler.h" -#else -#define GCCUSESGAS -#define PCVT_STANDALONE 1 -#endif - -#define SEQREG 0x03C4 -#define MISCREG 0x03C2 -#define MISCREAD 0x03CC - -double fref = 14.31818 * 2.0; -char ascclk[] = "VIDEO CLOCK ?"; - -unsigned short clknum; -unsigned short vlbus_flag; -unsigned short card; -unsigned short crtcaddr; -unsigned short clockreg; - -static double range[15] = {50.0, 51.0, 53.2, 58.5, 60.7, 64.4, 66.8, 73.5, - 75.6, 80.9, 83.2, 91.5, 100.0, 120.0, 120.0}; - -#ifdef __STDC__ -static double genratio(unsigned int *p, unsigned int *q, double tgt); -static double f(unsigned int p, unsigned int q, double basefreq); -#if 0 -static void prtbinary(unsigned int size, unsigned int val); -#endif -static void wait_vb(); -static void wrt_clk_bit(unsigned int value); -static void init_clock(unsigned long setup, unsigned short crtcport); -#else -static double genratio(); -static double f(); -#if 0 -static void prtbinary(); -#endif -static void wait_vb(); -static void wrt_clk_bit(); -static void init_clock(); -#endif - -void AltICD2061SetClock(frequency, select) -register long frequency; /* in Hz */ -int select; -{ - unsigned int m, mval, ival; - int i; - long dwv; - double realval; - double freq, fvco; - double dev, devx; - double delta, deltax; - unsigned int p, q; - unsigned int bestp, bestq; - unsigned char tmp; - - crtcaddr=(inb(0x3CC) & 0x01) ? 0x3D4 : 0x3B4; - - - outb(crtcaddr, 0x11); /* Unlock CRTC registers */ - tmp = inb(crtcaddr + 1); - outb(crtcaddr + 1, tmp & ~0x80); - - outw(crtcaddr, 0x4838); /* Unlock S3 register set */ - outw(crtcaddr, 0xA039); - - clknum = select; - - freq = ((double)frequency)/1000000.0; - if (freq > range[14]) - freq =range[14]; - else if (freq <= 6.99) - freq = 7.0; - -/* - * Calculate values to load into ICD 2061A clock chip to set frequency - */ - delta = 999.0; - dev = 999.0; - ival = 99; - mval = 99; - - fvco = freq / 2; - for (m = 0; m < 8; m++) { - fvco *= 2.0; - for (i = 14; i >= 0; i--) - if (fvco >= range[i]) - break; - if (i < 0) - continue; - if (i == 14) - break; - devx = (fvco - (range[i] + range[i+1])/2)/fvco; - if (devx < 0) - devx = -devx; - deltax = genratio(&p, &q, fvco); - if (delta < deltax) - continue; - if (deltax < delta || devx < dev) { - bestp = p; - bestq = q; - delta = deltax; - dev = devx; - ival = i; - mval = m; - } - } - fvco = fref; - for (m=0; m<mval; m++) - fvco /= 2.0; - realval = f(bestp, bestq, fvco); - dwv = ((((((long)ival << 7) | bestp) << 3) | mval) << 7) | bestq; - -/* - * Write ICD 2061A clock chip - */ - init_clock(((unsigned long)dwv) | (((long)clknum) << 21), crtcaddr); - - wait_vb(); - wait_vb(); - wait_vb(); - wait_vb(); - wait_vb(); - wait_vb(); - wait_vb(); /* 0.10 second delay... */ -} - -static double f(p, q, base) - unsigned int p; - unsigned int q; - double base; - { - return(base * (p + 3)/(q + 2)); - } - -static double genratio(p, q, tgt) - unsigned int *p; - unsigned int *q; - double tgt; - { - int k, m; - double test, mindiff; - unsigned int mmax; - - mindiff = 999999999.0; - for (k = 13; k < 69; k++) { /* q={15..71}:Constraint 2 on page 14 */ - m = 50.0*k/fref - 3; - if (m < 0) - m = 0; - mmax = 120*k/fref - 3; /* m..mmax is constraint 3 on page 14 */ - if (mmax > 128) - mmax = 128; - while (m < mmax) { - test = f(m, k, fref) - tgt; - if (test < 0) test = -test; - if (mindiff > test) { - mindiff = test; - *p = m; - *q = k; - } - m++; - } - } - return (mindiff); - } - -#if 0 -static void prtbinary(size, val) - unsigned int size; - unsigned int val; - { - unsigned int mask; - int k; - - mask = 1; - - for (k=size; --k > 0 || mask <= val/2;) - mask <<= 1; - - while (mask) { - fputc((mask&val)? '1': '0' , stderr); - mask >>= 1; - } - } -#endif - -static void wait_vb() - { - while ((inb(crtcaddr+6) & 0x08) == 0) - ; - while (inb(crtcaddr+6) & 0x08) - ; - } - - -#ifdef __STDC__ -static void init_clock(unsigned long setup, unsigned short crtcport) -#else -static void init_clock(setup, crtcport) - unsigned long setup; - unsigned short crtcport; -#endif - { - unsigned char nclk[2], clk[2]; - unsigned short restore42; - unsigned short oldclk; - unsigned short bitval; - int i; - unsigned char c; - -#ifndef PCVT_STANDALONE - (void)xf86DisableInterrupts(); -#endif - - oldclk = inb(0x3CC); - - outb(crtcport, 0x42); - restore42 = inb(crtcport+1); - - outw(0x3C4, 0x0100); - - outb(0x3C4, 1); - c = inb(0x3C5); - outb(0x3C5, 0x20 | c); - - outb(crtcport, 0x42); - outb(crtcport+1, 0x03); - - outw(0x3C4, 0x0300); - - nclk[0] = oldclk & 0xF3; - nclk[1] = nclk[0] | 0x08; - clk[0] = nclk[0] | 0x04; - clk[1] = nclk[0] | 0x0C; - - outb(crtcport, 0x42); - i = inw(crtcport); - - outw(0x3C4, 0x0100); - - wrt_clk_bit(oldclk | 0x08); - wrt_clk_bit(oldclk | 0x0C); - for (i=0; i<5; i++) { - wrt_clk_bit(nclk[1]); - wrt_clk_bit(clk[1]); - } - wrt_clk_bit(nclk[1]); - wrt_clk_bit(nclk[0]); - wrt_clk_bit(clk[0]); - wrt_clk_bit(nclk[0]); - wrt_clk_bit(clk[0]); - for (i=0; i<24; i++) { - bitval = setup & 0x01; - setup >>= 1; - wrt_clk_bit(clk[1-bitval]); - wrt_clk_bit(nclk[1-bitval]); - wrt_clk_bit(nclk[bitval]); - wrt_clk_bit(clk[bitval]); - } - wrt_clk_bit(clk[1]); - wrt_clk_bit(nclk[1]); - wrt_clk_bit(clk[1]); - - outb(0x3C4, 1); - c = inb(0x3C5); - outb(0x3C5, 0xDF & c); - - outb(crtcport, 0x42); - outb(crtcport+1, restore42); - - outb(0x3C2, oldclk); - - outw(0x3C4, 0x0300); - -#ifndef PCVT_STANDALONE - xf86EnableInterrupts(); -#endif - - } - -static void wrt_clk_bit(value) - unsigned int value; - { - int j; - - outb(0x3C2, value); - for (j=2; --j; ) - inb(0x200); - } |
