diff options
Diffstat (limited to 'src/southbridge/intel/i82801ix/early_init.c')
-rw-r--r-- | src/southbridge/intel/i82801ix/early_init.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801ix/early_init.c b/src/southbridge/intel/i82801ix/early_init.c new file mode 100644 index 0000000000..66cdf0315f --- /dev/null +++ b/src/southbridge/intel/i82801ix/early_init.c @@ -0,0 +1,65 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 secunet Security Networks AG + * + * 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. + * + * 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 + */ + +#include <arch/io.h> +#include <arch/romcc_io.h> +#include "i82801ix.h" + +void i82801ix_early_init(void) +{ + const device_t d31f0 = PCI_DEV(0, 0x1f, 0); + + /* Set up RCBA. */ + pci_write_config32(d31f0, D31F0_RCBA, DEFAULT_RCBA | 1); + + /* Set up PMBASE. */ + pci_write_config32(d31f0, D31F0_PMBASE, DEFAULT_PMBASE | 1); + /* Enable PMBASE. */ + pci_write_config8(d31f0, D31F0_ACPI_CNTL, 0x80); + + /* Set up GPIOBASE. */ + pci_write_config32(d31f0, D31F0_GPIO_BASE, DEFAULT_GPIOBASE); + /* Enable GPIO. */ + pci_write_config8(d31f0, D31F0_GPIO_CNTL, + pci_read_config8(d31f0, D31F0_GPIO_CNTL) | 0x10); + + /* Reset watchdog. */ + outw(0x0008, DEFAULT_TCOBASE + 0x04); /* R/WC, clear TCO caused SMI. */ + outw(0x0002, DEFAULT_TCOBASE + 0x06); /* R/WC, clear second timeout. */ + + /* Enable upper 128bytes of CMOS. */ + RCBA32(0x3400) = (1 << 2); + + /* Initialize power manangement initialization + register early as it affects reboot behavior. */ + /* Bit 20 activates global reset of host and ME on cf9 writes of 0x6 + and 0xe (required if ME is disabled but present), bit 31 locks it. + The other bits are 'must write'. */ + u8 reg8 = pci_read_config8(d31f0, 0xac); + reg8 |= (1 << 31) | (1 << 30) | (1 << 20) | (3 << 8); + pci_write_config8(d31f0, 0xac, reg8); + + /* TODO: If RTC power failed, reset RTC state machine + (set, then reset RTC 0x0b bit7) */ + + /* TODO: Check power state bits in GEN_PMCON_2 (D31F0 0xa2) + before they get cleared. */ +} + |