diff options
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/amd/cs5536/cs5536_early_setup.c | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/src/southbridge/amd/cs5536/cs5536_early_setup.c b/src/southbridge/amd/cs5536/cs5536_early_setup.c index eb8f9f5140..bf77087a47 100644 --- a/src/southbridge/amd/cs5536/cs5536_early_setup.c +++ b/src/southbridge/amd/cs5536/cs5536_early_setup.c @@ -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) |