diff options
Diffstat (limited to 'src/southbridge/intel/i82801gx/early_cir.c')
| -rw-r--r-- | src/southbridge/intel/i82801gx/early_cir.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801gx/early_cir.c b/src/southbridge/intel/i82801gx/early_cir.c new file mode 100644 index 000000000000..4f08a43b9109 --- /dev/null +++ b/src/southbridge/intel/i82801gx/early_cir.c @@ -0,0 +1,55 @@ +/* + * This file is part of the coreboot project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <device/pci_def.h> +#include <device/pci_ops.h> +#include "i82801gx.h" + +/* Chipset Initialization Registers magic */ +void ich7_setup_cir(void) +{ + uint32_t reg32; + uint8_t revision = pci_read_config8(PCI_DEV(0, 31, 0), PCI_REVISION_ID); + uint16_t pci_id = pci_read_config16(PCI_DEV(0, 31, 0), PCI_DEVICE_ID); + + RCBA32(0x0088) = 0x0011d000; + RCBA16(0x01fc) = 0x060f; + RCBA32(0x01f4) = 0x86000040; + /* Although bit 6 is set, it is not read back */ + RCBA32(0x0214) = 0x10030549; + RCBA32(0x0218) = 0x00020504; + RCBA8(0x0220) = 0xc5; + reg32 = RCBA32(GCS); + reg32 |= (1 << 6); + RCBA32(GCS) = reg32; + RCBA32_AND_OR(0x3430, ~(3 << 0), 1 << 0); + RCBA16(0x0200) = 0x2008; + RCBA8(0x2027) = 0x0d; + RCBA16(0x3e08) |= (1 << 7); + RCBA16(0x3e48) |= (1 << 7); + RCBA32(0x3e0e) |= (1 << 7); + RCBA32(0x3e4e) |= (1 << 7); + + /* Only on mobile variants of revision b0 or later */ + switch (pci_id) { + case 0x27b9: + case 0x27bc: + case 0x27bd: + if (revision >= 2) { + reg32 = RCBA32(0x2034); + reg32 &= ~(0x0f << 16); + reg32 |= (5 << 16); + RCBA32(0x2034) = reg32; + } + } +} |