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set CLKIN frequence to 24 MHZ for correct Serial Port operation

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This commit is contained in:
Li-Ta Lo 2000-10-26 03:13:26 +00:00
parent da504a912a
commit 1df1f5955d
1 changed files with 15 additions and 10 deletions
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25
src/superio/sis/950/superio.c
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@ -8,20 +8,20 @@
void void
enter_pnp() enter_pnp()
{ {
// unlock it XXX make this a subr at some point // unlock it XXX make this a subr at some point
outb(0x87, 0x2e); outb(0x87, 0x2e);
outb(0x01, 0x2e); outb(0x01, 0x2e);
outb(0x55, 0x2e); outb(0x55, 0x2e);
outb(0x55, 0x2e); outb(0x55, 0x2e);
} }
void void
exit_pnp() exit_pnp()
{ {
/* all done. */ /* all done. */
// select configure control // select configure control
outb(2, 0x2e); outb(2, 0x2e);
outb(2, 0x2f); outb(2, 0x2f);
} }
#ifdef MUST_ENABLE_FLOPPY #ifdef MUST_ENABLE_FLOPPY
@ -35,13 +35,13 @@ void enable_floppy()
/* now select register 0x30, and set bit 1 in that register */ /* now select register 0x30, and set bit 1 in that register */
outb(0x30, 0x2e); outb(0x30, 0x2e);
outb(0x1, 0x2f); outb(0x1, 0x2f);
} }
#endif /* MUST_ENABLE_FLOPPY */ #endif /* MUST_ENABLE_FLOPPY */
void void
enable_com(int com) enable_com(int com)
{ {
unsigned char b;
/* now set the LDN to com LDN */ /* now set the LDN to com LDN */
outb(0x7, 0x2e); /* pick reg. 7 */ outb(0x7, 0x2e); /* pick reg. 7 */
outb(com, 0x2f); /* LDN 0 to reg. 7 */ outb(com, 0x2f); /* LDN 0 to reg. 7 */
@ -50,6 +50,11 @@ enable_com(int com)
outb(0x30, 0x2e); outb(0x30, 0x2e);
outb(0x1, 0x2f); outb(0x1, 0x2f);
/* set CLKIN frequence to 24 MHZ */
outb(0x24, 0x2e);
b = inb(0x2f) | 0xfd;
outb(0x24, 0x2e);
outb(b, 0x2f);
} }
void void