| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <arch/io.h> |
| #include <device/pci_ops.h> |
| #include <device/device.h> |
| #include <device/pci_def.h> |
| #include <device/smbus_host.h> |
| #include <southbridge/intel/common/pmclib.h> |
| #include <elog.h> |
| #include "pch.h" |
| #include "chip.h" |
| |
| #if CONFIG(INTEL_LYNXPOINT_LP) |
| #include "lp_gpio.h" |
| extern const struct pch_lp_gpio_map mainboard_gpio_map[]; |
| #else |
| #include <southbridge/intel/common/gpio.h> |
| #endif |
| |
| enum pch_platform_type get_pch_platform_type(void) |
| { |
| const u16 did = pci_read_config16(PCH_LPC_DEV, PCI_DEVICE_ID); |
| |
| /* Check if this is a LPT-LP or WPT-LP device ID */ |
| if ((did & 0xff00) == 0x9c00) |
| return PCH_TYPE_ULT; |
| |
| /* Non-LP laptop SKUs have an odd device ID (least significant bit is one) */ |
| if (did & 1) |
| return PCH_TYPE_MOBILE; |
| |
| /* Desktop and Server SKUs have an even device ID */ |
| return PCH_TYPE_DESKTOP; |
| } |
| |
| int pch_is_lp(void) |
| { |
| return get_pch_platform_type() == PCH_TYPE_ULT; |
| } |
| |
| static void pch_enable_bars(void) |
| { |
| pci_write_config32(PCH_LPC_DEV, RCBA, (uintptr_t)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) |
| { |
| 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"); |
| } |
| |
| void pch_enable_lpc(void) |
| { |
| const struct device *dev = pcidev_on_root(0x1f, 0); |
| const struct southbridge_intel_lynxpoint_config *config = NULL; |
| |
| /* Set COM1/COM2 decode range */ |
| pci_write_config16(PCH_LPC_DEV, LPC_IO_DEC, 0x0010); |
| |
| /* Enable SuperIO + MC + COM1 + PS/2 Keyboard/Mouse */ |
| u16 lpc_config = CNF1_LPC_EN | CNF2_LPC_EN | GAMEL_LPC_EN | |
| COMA_LPC_EN | KBC_LPC_EN | MC_LPC_EN; |
| pci_write_config16(PCH_LPC_DEV, LPC_EN, lpc_config); |
| |
| /* Set up generic decode ranges */ |
| if (!dev) |
| return; |
| if (dev->chip_info) |
| config = dev->chip_info; |
| if (!config) |
| return; |
| |
| pci_write_config32(PCH_LPC_DEV, LPC_GEN1_DEC, config->gen1_dec); |
| pci_write_config32(PCH_LPC_DEV, LPC_GEN2_DEC, config->gen2_dec); |
| pci_write_config32(PCH_LPC_DEV, LPC_GEN3_DEC, config->gen3_dec); |
| pci_write_config32(PCH_LPC_DEV, LPC_GEN4_DEC, config->gen4_dec); |
| } |
| |
| void __weak mainboard_config_superio(void) |
| { |
| } |
| |
| int early_pch_init(void) |
| { |
| int wake_from_s3; |
| |
| pch_enable_bars(); |
| |
| #if CONFIG(INTEL_LYNXPOINT_LP) |
| setup_pch_lp_gpios(mainboard_gpio_map); |
| #else |
| setup_pch_gpios(&mainboard_gpio_map); |
| #endif |
| pch_generic_setup(); |
| |
| /* Enable SMBus for reading SPDs. */ |
| enable_smbus(); |
| |
| /* Enable IOAPIC */ |
| RCBA16(OIC) = 0x0100; |
| |
| /* PCH BWG says to read back the IOAPIC enable register */ |
| (void) RCBA16(OIC); |
| |
| /* Mainboard RCBA settings */ |
| mainboard_config_rcba(); |
| |
| RCBA32_OR(FD, PCH_DISABLE_ALWAYS); |
| |
| wake_from_s3 = southbridge_detect_s3_resume(); |
| |
| elog_boot_notify(wake_from_s3); |
| |
| /* Report if we are waking from s3. */ |
| return wake_from_s3; |
| } |