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Nvidia MCP55 uses CMD to send/receive bytes instead of DAT0, 

that's the same as broadcom/bcm5785. 

Signed-off-by: bxshi <bingxunshi@gmail.com>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2548 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
bxshi 2007-02-03 15:23:34 +00:00 committed by Stefan Reinauer
parent de7f81f48a
commit c5708d19fd
1 changed files with 6 additions and 7 deletions
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13
src/southbridge/nvidia/mcp55/mcp55_smbus.h
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@ -80,9 +80,7 @@ static int do_smbus_recv_byte(unsigned smbus_io_base, unsigned device)
/* set the device I'm talking too */
outb(((device & 0x7f) << 1)|1 , smbus_io_base + SMBXMITADD);
smbus_delay();
/* set the command/address... */
outb(0, smbus_io_base + SMBHSTCMD);
smbus_delay();
/* byte data recv */
outb(0x05, smbus_io_base + SMBHSTPRTCL);
smbus_delay();
@ -95,7 +93,7 @@ static int do_smbus_recv_byte(unsigned smbus_io_base, unsigned device)
global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; /* lose check */
/* read results of transaction */
byte = inb(smbus_io_base + SMBHSTDAT0);
byte = inb(smbus_io_base + SMBHSTCMD);
if (global_status_register != 0x80) { // lose check, otherwise it should be 0
return -1;
@ -109,11 +107,12 @@ static int do_smbus_send_byte(unsigned smbus_io_base, unsigned device, unsigned
outb(val, smbus_io_base + SMBHSTDAT0);
smbus_delay();
/* set the device I'm talking too */
outb(((device & 0x7f) << 1) | 0, smbus_io_base + SMBXMITADD);
/* set the command... */
outb(val, smbus_io_base + SMBHSTCMD);
smbus_delay();
outb(0, smbus_io_base + SMBHSTCMD);
/* set the device I'm talking too */
outb(((device & 0x7f) << 1) | 0, smbus_io_base + SMBXMITADD);
smbus_delay();
/* set up for a byte data write */