From 4edbe004b8b8c97900573218974191d2a2b77f1c Mon Sep 17 00:00:00 2001 From: Scott Duplichan Date: Wed, 13 Jul 2011 17:34:16 -0600 Subject: Move AMD SB800 early clock setup. Move the AMD SB800 early clock setup code that is needed for early serial port operation from mainboard/romstage.c to sb800/bootblock.c. This prevents code duplication and simplifies porting. Change-Id: I615cfec96c9f202d9c154dc6674ec7cbcf4090c3 Signed-off-by: Scott Duplichan Signed-off-by: Marc Jones Reviewed-on: http://review.coreboot.org/96 Tested-by: build bot (Jenkins) Reviewed-by: Peter Stuge --- src/southbridge/amd/cimx/sb800/bootblock.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/southbridge/amd/cimx/sb800/bootblock.c') diff --git a/src/southbridge/amd/cimx/sb800/bootblock.c b/src/southbridge/amd/cimx/sb800/bootblock.c index 170276ac69..593bd6bfc7 100644 --- a/src/southbridge/amd/cimx/sb800/bootblock.c +++ b/src/southbridge/amd/cimx/sb800/bootblock.c @@ -84,10 +84,31 @@ static void enable_spi_fast_mode(void) pci_io_write_config32(dev, 0xa0, save); } +static void enable_clocks(void) +{ + u8 reg8; + u32 reg32; + volatile u32 *acpi_mmio = (void *) (0xFED80000 + 0xE00 + 0x40); + + // Program AcpiMmioEn to enable MMIO access to MiscCntrl register + outb(0x24, 0xCD6); + reg8 = inb(0xCD7); + reg8 |= 1; + reg8 &= ~(1 << 1); + outb(reg8, 0xCD7); + + // Program SB800 MiscCntrl Device_CLK1_sel for 48 MHz (default is 14 MHz) + reg32 = *acpi_mmio; + reg32 &= ~((1 << 0) | (1 << 2)); + reg32 |= 1 << 1; + *acpi_mmio = reg32; +} + static void bootblock_southbridge_init(void) { /* Setup the rom access for 2M */ enable_rom(); enable_prefetch(); enable_spi_fast_mode(); + enable_clocks(); } -- cgit v1.2.3