diff options
Diffstat (limited to 'src/southbridge/intel/lynxpoint/early_pch.c')
| -rw-r--r-- | src/southbridge/intel/lynxpoint/early_pch.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/southbridge/intel/lynxpoint/early_pch.c b/src/southbridge/intel/lynxpoint/early_pch.c new file mode 100644 index 0000000000..d0a583fa1b --- /dev/null +++ b/src/southbridge/intel/lynxpoint/early_pch.c @@ -0,0 +1,172 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Google Inc. + * + * 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 <console/console.h> +#include <arch/io.h> +#include <arch/romcc_io.h> +#include <device/pci_def.h> +#include <elog.h> +#include "pch.h" + +#if CONFIG_INTEL_LYNXPOINT_LP +#include "lp_gpio.h" +#else +#include "gpio.h" +#endif + +static void pch_enable_bars(void) +{ + /* Setting up Southbridge. In the northbridge code. */ + pci_write_config32(PCH_LPC_DEV, RCBA, DEFAULT_RCBA | 1); + + pci_write_config32(PCH_LPC_DEV, PMBASE, DEFAULT_PMBASE | 1); + /* Enable ACPI BAR */ + pci_write_config8(PCH_LPC_DEV, ACPI_CNTL, 0x80); + + pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE|1); + + /* Enable GPIO functionality. */ + pci_write_config8(PCH_LPC_DEV, GPIO_CNTL, 0x10); +} + +static void pch_generic_setup(void) +{ + u8 reg8; + + printk(BIOS_DEBUG, "Disabling Watchdog reboot..."); + RCBA32(GCS) = RCBA32(GCS) | (1 << 5); /* No reset */ + outw((1 << 11), DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */ + printk(BIOS_DEBUG, " done.\n"); + + // reset rtc power status + reg8 = pci_read_config8(PCH_LPC_DEV, GEN_PMCON_3); + reg8 &= ~(1 << 2); + pci_write_config8(PCH_LPC_DEV, GEN_PMCON_3, reg8); +} + +static int sleep_type_s3(void) +{ + u32 pm1_cnt; + u16 pm1_sts; + int is_s3 = 0; + + /* Check PM1_STS[15] to see if we are waking from Sx */ + pm1_sts = inw(DEFAULT_PMBASE + PM1_STS); + if (pm1_sts & WAK_STS) { + /* Read PM1_CNT[12:10] to determine which Sx state */ + pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT); + if (((pm1_cnt >> 10) & 7) == SLP_TYP_S3) { + /* Clear SLP_TYPE. */ + outl(pm1_cnt & ~(7 << 10), DEFAULT_PMBASE + PM1_CNT); + is_s3 = 1; + } + } + return is_s3; +} + +static void pch_enable_lpc(void) +{ + device_t dev = PCH_LPC_DEV; + + /* Set COM1/COM2 decode range */ + pci_write_config16(dev, LPC_IO_DEC, 0x0010); + + /* Enable SuperIO + COM1 + PS/2 Keyboard/Mouse */ + u16 lpc_config = CNF1_LPC_EN | CNF2_LPC_EN | COMA_LPC_EN | KBC_LPC_EN; + pci_write_config16(dev, LPC_EN, lpc_config); +} + +static void pch_config_rcba(const struct rcba_config_instruction *rcba_config) +{ + const struct rcba_config_instruction *rc; + u32 value; + + rc = rcba_config; + while (rc->command != RCBA_COMMAND_END) + { + if ((rc->command & RCBA_REG_SIZE_MASK) == RCBA_REG_SIZE_16) { + switch (rc->command & RCBA_COMMAND_MASK) { + case RCBA_COMMAND_SET: + RCBA16(rc->reg) = (u16)rc->or_value; + break; + case RCBA_COMMAND_READ: + (void)RCBA16(rc->reg); + break; + case RCBA_COMMAND_RMW: + value = RCBA16(rc->reg); + value &= rc->mask; + value |= rc->or_value; + RCBA16(rc->reg) = (u16)value; + break; + } + } else { + switch (rc->command & RCBA_COMMAND_MASK) { + case RCBA_COMMAND_SET: + RCBA32(rc->reg) = rc->or_value; + break; + case RCBA_COMMAND_READ: + (void)RCBA32(rc->reg); + break; + case RCBA_COMMAND_RMW: + value = RCBA32(rc->reg); + value &= rc->mask; + value |= rc->or_value; + RCBA32(rc->reg) = value; + break; + } + } + rc++; + } +} + +int early_pch_init(const void *gpio_map, + const struct rcba_config_instruction *rcba_config) +{ + int wake_from_s3; + + pch_enable_lpc(); + + pch_enable_bars(); + +#if CONFIG_INTEL_LYNXPOINT_LP + setup_pch_lp_gpios(gpio_map); +#else + setup_pch_gpios(gpio_map); +#endif + + console_init(); + + pch_generic_setup(); + + /* Enable SMBus for reading SPDs. */ + enable_smbus(); + + pch_config_rcba(rcba_config); + + wake_from_s3 = sleep_type_s3(); + +#if CONFIG_ELOG_BOOT_COUNT + if (!wake_from_s3) + boot_count_increment(); +#endif + + /* Report if we are waking from s3. */ + return wake_from_s3; +} |