diff options
Diffstat (limited to 'src/southbridge/amd/agesa')
| -rw-r--r-- | src/southbridge/amd/agesa/hudson/early_setup.c | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/src/southbridge/amd/agesa/hudson/early_setup.c b/src/southbridge/amd/agesa/hudson/early_setup.c index 96861c99ca..a1295121ce 100644 --- a/src/southbridge/amd/agesa/hudson/early_setup.c +++ b/src/southbridge/amd/agesa/hudson/early_setup.c @@ -29,6 +29,51 @@ #include <cbmem.h> #include "hudson.h" +void hudson_pci_port80(void) +{ + u8 byte; + device_t dev; + + /* P2P Bridge */ + dev = PCI_DEV(0, 0x14, 4); + + /* Chip Control: Enable subtractive decoding */ + byte = pci_read_config8(dev, 0x40); + byte |= 1 << 5; + pci_write_config8(dev, 0x40, byte); + + /* Misc Control: Enable subtractive decoding if 0x40 bit 5 is set */ + byte = pci_read_config8(dev, 0x4B); + byte |= 1 << 7; + pci_write_config8(dev, 0x4B, byte); + + /* The same IO Base and IO Limit here is meaningful because we set the + * bridge to be subtractive. During early setup stage, we have to make + * sure that data can go through port 0x80. + */ + /* IO Base: 0xf000 */ + byte = pci_read_config8(dev, 0x1C); + byte |= 0xF << 4; + pci_write_config8(dev, 0x1C, byte); + + /* IO Limit: 0xf000 */ + byte = pci_read_config8(dev, 0x1D); + byte |= 0xF << 4; + pci_write_config8(dev, 0x1D, byte); + + /* PCI Command: Enable IO response */ + byte = pci_read_config8(dev, 0x04); + byte |= 1 << 0; + pci_write_config8(dev, 0x04, byte); + + /* LPC controller */ + dev = PCI_DEV(0, 0x14, 3); + + byte = pci_read_config8(dev, 0x4A); + byte &= ~(1 << 5); /* disable lpc port 80 */ + pci_write_config8(dev, 0x4A, byte); +} + void hudson_lpc_port80(void) { u8 byte; @@ -42,9 +87,9 @@ void hudson_lpc_port80(void) outb(byte, 0xCD7); /* Enable port 80 LPC decode in pci function 3 configuration space. */ - dev = PCI_DEV(0, 0x14, 3);//pci_locate_device(PCI_ID(0x1002, 0x439D), 0); + dev = PCI_DEV(0, 0x14, 3); byte = pci_read_config8(dev, 0x4a); - byte |= 1 << 5; /* enable port 80 */ + byte |= 1 << 5; /* enable port 80 */ pci_write_config8(dev, 0x4a, byte); } |