diff options
| author | Scott Duplichan <scott@notabs.org> | 2011-07-13 17:34:16 -0600 |
|---|---|---|
| committer | Peter Stuge <peter@stuge.se> | 2011-07-14 04:16:23 +0200 |
| commit | 4edbe004b8b8c97900573218974191d2a2b77f1c (patch) | |
| tree | 997b41f6f7a62f90d9d1bab4c9a768743d099624 /src/southbridge | |
| parent | 9229af963df17257d87efd9a83bba9fe6021046c (diff) | |
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 <scott@notabs.org>
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: http://review.coreboot.org/96
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/amd/cimx/sb800/bootblock.c | 21 |
1 files changed, 21 insertions, 0 deletions
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(); } |