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mods for early printing on OLPC

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2297 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Ronald G. Minnich
2006-05-04 23:05:49 +00:00
parent ab4f5d0c10
commit 070a10f759
3 changed files with 74 additions and 15 deletions
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59
src/southbridge/amd/cs5536/cs5536_early_setup.c
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@@ -113,6 +113,24 @@ static void cs5536_setup_gpio(void)
//outl(0x3ffbc004, 0x6100 + 0x34);
outl(0x3fffc000, 0x6100 + 0x34);
//outl(val, 0x6100 + 0x34);
#if 0
/* changes proposed by Ollie; we will test this later. */
/* setup GPIO pins 14/15 for SDA/SCL */
val = GPIOL_15_SET | GPIOL_14_SET;
/* Output Enable */
//outl(0x3fffc000, 0x6100 + 0x04);
outl(val, 0x6100 + 0x04);
/* Output AUX1 */
//outl(0x3fffc000, 0x6100 + 0x10);
outl(val, 0x6100 + 0x10);
/* Input Enable */
//outl(0x3fffc000, 0x6100 + 0x20);
outl(val, 0x6100 + 0x20);
/* Input AUX1 */
//outl(0x3fffc000, 0x6100 + 0x34);
outl(val, 0x6100 + 0x34);
#endif
}
static void cs5536_disable_internal_uart(void)
@@ -158,7 +176,8 @@ static void dummy(void)
/* see page 412 of the cs5536 companion book */
static int cs5536_setup_onchipuart(void)
{
/* ToDo:
unsigned long m;
/*
* 1. Eanble GPIO 8 to OUT_AUX1, 9 to IN_AUX1
* GPIO LBAR + 0x04, LBAR + 0x10, LBAR + 0x20, LBAR + 34
* 2. Enable UART IO space in MDD
@@ -171,8 +190,46 @@ static int cs5536_setup_onchipuart(void)
msr_t msr;
msr.lo = 2;
msr.hi = 0;
/* not sure what this is for, so comment it out ...
wrmsr(0x5140003a, msr);
wrmsr(0x5140003e, msr);
*/
/* GPIO8 - UART1_TX */
/* Set: Output Enable (0x4) */
m = inl(GPIOL_OUTPUT_ENABLE);
m |= GPIOL_8_SET;
m &= ~GPIOL_8_CLEAR;
outl(m,GPIOL_OUTPUT_ENABLE);
/* Set: OUTAUX1 Select (0x10) */
m = inl(GPIOL_OUT_AUX1_SELECT);
m |= GPIOL_8_SET;
m &= ~GPIOL_8_CLEAR;
outl(m,GPIOL_OUT_AUX1_SELECT);
/* Set: Pull Up (0x18) */
m = inl(GPIOL_PULLUP_ENABLE);
m |= GPIOL_8_SET;
m &= ~GPIOL_8_CLEAR;
/* GPIO9 - UART1_RX */
/* Set: Pull Up (0x18) */
m |= GPIOL_9_SET;
m &= ~GPIOL_9_CLEAR;
outl(m,GPIOL_PULLUP_ENABLE);
/* Set: Input Enable (0x20) */
m = inl(GPIOL_INPUT_ENABLE);
m |= GPIOL_9_SET;
m &= ~GPIOL_9_CLEAR;
outl(m,GPIOL_INPUT_ENABLE);
/* Set: INAUX1 Select (0x34) */
m = inl(GPIOL_IN_AUX1_SELECT);
m |= GPIOL_9_SET;
m &= ~GPIOL_9_CLEAR;
outl(m,GPIOL_IN_AUX1_SELECT);
msr = rdmsr(MDD_LEG_IO);
msr.lo |= 0x7 << 16;
wrmsr(MDD_LEG_IO,msr);
}
static int cs5536_early_setup(void)