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authorbxshi <bingxunshi@gmail.com>2007-02-03 15:23:34 +0000
committerStefan Reinauer <stepan@openbios.org>2007-02-03 15:23:34 +0000
commitc5708d19fd3fc00df9f1cd18a9db93742acc70df (patch)
tree4364ac7b7e46bb163bd76959b479082847025c4a /src
parentde7f81f48a35cf09eb661e3da3a92b35d3c61aee (diff)
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
Diffstat (limited to 'src')
-rw-r--r--src/southbridge/nvidia/mcp55/mcp55_smbus.h13
1 files changed, 6 insertions, 7 deletions
diff --git a/src/southbridge/nvidia/mcp55/mcp55_smbus.h b/src/southbridge/nvidia/mcp55/mcp55_smbus.h
index 9896b7ba4e..db3bd558a1 100644
--- a/src/southbridge/nvidia/mcp55/mcp55_smbus.h
+++ b/src/southbridge/nvidia/mcp55/mcp55_smbus.h
@@ -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 */