diff options
Diffstat (limited to 'src/southbridge/sis/sis966/early_setup_car.c')
| -rw-r--r-- | src/southbridge/sis/sis966/early_setup_car.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/southbridge/sis/sis966/early_setup_car.c b/src/southbridge/sis/sis966/early_setup_car.c new file mode 100644 index 0000000000..9de33137a7 --- /dev/null +++ b/src/southbridge/sis/sis966/early_setup_car.c @@ -0,0 +1,63 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2006 AMD + * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD. + * Copyright (C) 2007 Silicon Integrated Systems Corp. (SiS) + * Written by Morgan Tsai <my_tsai@sis.com> for SiS. + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +void sis966_early_pcie_setup(unsigned busnx, unsigned devnx, unsigned anactrl_io_base, unsigned pci_e_x) +{ + uint32_t tgio_ctrl; + uint32_t pll_ctrl; + uint32_t dword; + int i; + device_t dev; + dev = PCI_DEV(busnx, devnx+1, 1); + dword = pci_read_config32(dev, 0xe4); + dword |= 0x3f0; // disable it at first + pci_write_config32(dev, 0xe4, dword); + + for(i=0; i<3; i++) { + tgio_ctrl = inl(anactrl_io_base + 0xcc); + tgio_ctrl &= ~(3<<9); + tgio_ctrl |= (i<<9); + outl(tgio_ctrl, anactrl_io_base + 0xcc); + pll_ctrl = inl(anactrl_io_base + 0x30); + pll_ctrl |= (1<<31); + outl(pll_ctrl, anactrl_io_base + 0x30); + do { + pll_ctrl = inl(anactrl_io_base + 0x30); + } while (!(pll_ctrl & 1)); + } + tgio_ctrl = inl(anactrl_io_base + 0xcc); + tgio_ctrl &= ~((7<<4)|(1<<8)); + tgio_ctrl |= (pci_e_x<<4)|(1<<8); + outl(tgio_ctrl, anactrl_io_base + 0xcc); + +// wait 100us + udelay(100); + + dword = pci_read_config32(dev, 0xe4); + dword &= ~(0x3f0); // enable + pci_write_config32(dev, 0xe4, dword); + +// need to wait 100ms + mdelay(100); +} + |