92 lines
1.6 KiB
C
92 lines
1.6 KiB
C
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/*
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* Initialization code for OPTI MAD16 interface chip by
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* Davor Jadrijevic <davor@emard.pub.hr>
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* (Included by ad1848.c when MAD16 support is enabled)
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*
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* It looks like MAD16 is similar than the Mozart chip (OAK OTI-601).
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* It could be even possible that these chips are exactly the same. Can
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* anybody confirm this?
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*/
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static void wr_a_mad16(int base, int v, int a)
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{
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OUTB(a, base + 0xf);
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OUTB(v, base + 0x11);
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}
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static void wr_b_mad16(int base, int v, int a)
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{
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OUTB(a, base + 0xf);
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OUTB(v, base + 0xd);
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}
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/*
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static int rd_a_mad16(int base, int a)
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{
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OUTB(a, base + 0xf);
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return INB(base + 0x11);
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}
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*/
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static int rd_b_mad16(int base, int a)
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{
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OUTB(a, base + 0xf);
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return INB(base + 0xd);
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}
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/*
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static int rd_0_mad16(int base, int a)
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{
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OUTB(a, base + 0xf);
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return INB(base + 0xf);
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}
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static void wr_ad(int base, int v, int a)
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{
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OUTB(a, base + 4);
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OUTB(v, base + 5);
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}
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static int rd_ad(int base, int a)
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{
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OUTB(a, base + 4);
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return INB(base + 5);
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}
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*/
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static int mad16init(int adr)
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{
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int j;
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long i;
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static int ad1848_bases[] =
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{ 0x220, -1, -1, 0x240, -1, -1, -1, -1, 0x530, 0xE80, 0xF40, 0x604, 0 };
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int mad16_base = 0xf80, ad1848_base;
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for(j = 0; (j < 16) && (ad1848_bases[j] != 0); j++)
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if(adr == ad1848_bases[j])
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break;
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if( (ad1848_base = ad1848_bases[j]) < 0x530)
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{
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printk("Unknown MAD16 setting 0x%3X\n", adr);
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return -1;
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}
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/* printk("OPTi MAD16 WSS at 0x%3X\n", ad1848_base); */
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rd_b_mad16(mad16_base, 0xe2);
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wr_a_mad16(mad16_base, 0x1a, 0xe2);
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wr_b_mad16(mad16_base, j * 16 + 1, 0xe2);
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wr_a_mad16(mad16_base, 0x1a, 0xe2);
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for( i = 0; i < 10000; i++)
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if( (INB(ad1848_base+4) & 0x80) == 0 )
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break;
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return 0;
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};
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