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add smbus_write_byte() function. currently fails in romcc :( 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1197 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer 2003-10-06 15:04:41 +00:00
parent 2e90c1daa0
commit a84c6f81ef
2 changed files with 35 additions and 2 deletions
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5
src/mainboard/amd/quartet/auto.c
View File

@ -99,9 +99,10 @@ static inline int spd_read_byte(unsigned device, unsigned address)
unsigned hub = device >> 8;
device &= 0xff;
// smbus_write_byte(SMBUS_HUB, hub);
smbus_write_byte(SMBUS_HUB, 0x01, 1<<hub);
smbus_write_byte(SMBUS_HUB, 0x03, 0);
return smbus_read_byte(device, address);
}
/* no specific code here. this should go away completely */

32
src/southbridge/amd/amd8111/amd8111_early_smbus.c
View File

@ -106,3 +106,35 @@ static int smbus_read_byte(unsigned device, unsigned address)
}
return byte;
}
static void smbus_write_byte(unsigned device, unsigned address, unsigned char val)
{
#if 0
if (smbus_wait_until_ready() < 0) {
return;
}
/* setup transaction */
/* disable interrupts */
outw(inw(SMBUS_IO_BASE + SMBGCTL) & ~((1<<10)|(1<<9)|(1<<8)|(1<<4)),
SMBUS_IO_BASE + SMBGCTL);
/* set the device I'm talking too */
outw(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBHSTADDR);
outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
/* set up for a byte data write */ /* FIXME */
outw((inw(SMBUS_IO_BASE + SMBGCTL) & ~7) | (0x1), SMBUS_IO_BASE + SMBGCTL);
/* clear any lingering errors, so the transaction will run */
/* Do I need to write the bits to a 1 to clear an error? */
outw(inw(SMBUS_IO_BASE + SMBGSTATUS), SMBUS_IO_BASE + SMBGSTATUS);
/* clear the data word...*/
outw(val, SMBUS_IO_BASE + SMBHSTDAT);
/* start the command */
outw((inw(SMBUS_IO_BASE + SMBGCTL) | (1 << 3)), SMBUS_IO_BASE + SMBGCTL);
/* poll for transaction completion */
smbus_wait_until_done();
#endif
return;
}