Remove duplicated GX2 processor IIOC mode setting on CS5535 southbridge code

and fix CIS mode comments.

Signed-off-by: Nils Jacobs <njacobs8@hetnet.nl>
Acked-by: Stefan Reinauer <stepan@coreboot.org>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6225 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

3 files changed, 5 insertions, 12 deletions

diff --git a/src/cpu/amd/model_gx2/cpureginit.c b/src/cpu/amd/model_gx2/cpureginit.c
index cfb86aa327..0fc852d531 100644
--- a/src/cpu/amd/model_gx2/cpureginit.c
+++ b/src/cpu/amd/model_gx2/cpureginit.c
@@ -88,16 +88,13 @@ void cpuRegInit (void)
 	msr.lo =  0x00000603C;
 	wrmsr(msrnum, msr);
 
-/* Only do this if we are building for 5535 */
 /* FooGlue Setup */
-#if 1
-	/* Enable CIS mode B in FooGlue */
-	msrnum = MSR_FG + 0x10;
+	/* Set CS5535/CS5536 mode in FooGlue */
+	msrnum = FG_GIO_MSR_SEL;
 	msr = rdmsr(msrnum);
 	msr.lo &= ~3;
-	msr.lo |= 2;		/* ModeB */
+	msr.lo |= 2;		/* IIOC mode CS5535/CS5536 enable. (according to Jordan Crouse the databook is wrong bits 1:0 have to be 2 instead of 1) */
 	wrmsr(msrnum, msr);
-#endif
 
 /* Disable DOT PLL. Graphics init will enable it if needed. */
 	msrnum = GLCP_DOTPLL;
diff --git a/src/southbridge/amd/cs5535/early_setup.c b/src/southbridge/amd/cs5535/early_setup.c
index 1a612cc55f..4a2e1b4965 100644
--- a/src/southbridge/amd/cs5535/early_setup.c
+++ b/src/southbridge/amd/cs5535/early_setup.c
@@ -107,15 +107,11 @@ static void cs5535_setup_cis_mode(void)
 {
 	msr_t msr;
 
-	/* setup CPU interface serial to mode C on both sides */
+	/* Setup CPU serial SouthBridge interface to mode C. */
 	msr = rdmsr(GLPCI_SB_CTRL);
 	msr.lo &= ~0x18;
 	msr.lo |= 0x10;
 	wrmsr(GLPCI_SB_CTRL, msr);
-	//Only do this if we are building for 5535
-	msr.lo = 0x2;
-	msr.hi = 0x0;
-	wrmsr(VIP_GIO_MSR_SEL, msr);
 }
 
 static void dummy(void)
diff --git a/src/southbridge/amd/cs5536/early_setup.c b/src/southbridge/amd/cs5536/early_setup.c
index 0a35964ef2..7d982433d4 100644
--- a/src/southbridge/amd/cs5536/early_setup.c
+++ b/src/southbridge/amd/cs5536/early_setup.c
@@ -145,7 +145,7 @@ static void cs5536_setup_cis_mode(void)
 {
 	msr_t msr;
 
-	/* setup CPU interface serial to mode B to match CPU */
+	/* Setup CPU serial SouthBridge interface to mode C. */
 	msr = rdmsr(GLPCI_SB_CTRL);
 	msr.lo &= ~0x18;
 	msr.lo |= 0x10;