diff options
Diffstat (limited to 'src/soc/intel/alderlake/bootblock/pch.c')
| -rw-r--r-- | src/soc/intel/alderlake/bootblock/pch.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/bootblock/pch.c b/src/soc/intel/alderlake/bootblock/pch.c new file mode 100644 index 0000000000..8452d83290 --- /dev/null +++ b/src/soc/intel/alderlake/bootblock/pch.c @@ -0,0 +1,153 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * This file is created based on Intel Alder Lake Processor PCH Datasheet + * Document number: 621483 + * Chapter number: 2, 3, 4, 27, 28 + */ + +#include <device/mmio.h> +#include <device/device.h> +#include <device/pci_ops.h> +#include <intelblocks/fast_spi.h> +#include <intelblocks/gspi.h> +#include <intelblocks/lpc_lib.h> +#include <intelblocks/p2sb.h> +#include <intelblocks/pcr.h> +#include <intelblocks/pmclib.h> +#include <intelblocks/rtc.h> +#include <soc/bootblock.h> +#include <soc/espi.h> +#include <soc/iomap.h> +#include <soc/p2sb.h> +#include <soc/pch.h> +#include <soc/pci_devs.h> +#include <soc/pcr_ids.h> +#include <soc/pm.h> + +#define PCR_PSF3_TO_SHDW_PMC_REG_BASE 0x1100 +#define PCR_PSFX_TO_SHDW_BAR0 0 +#define PCR_PSFX_TO_SHDW_BAR1 0x4 +#define PCR_PSFX_TO_SHDW_BAR2 0x8 +#define PCR_PSFX_TO_SHDW_BAR3 0xC +#define PCR_PSFX_TO_SHDW_BAR4 0x10 +#define PCR_PSFX_TO_SHDW_PCIEN_IOEN 0x01 +#define PCR_PSFX_T0_SHDW_PCIEN 0x1C + +#define PCR_DMI_DMICTL 0x2234 +#define PCR_DMI_DMICTL_SRLOCK (1 << 31) + +#define PCR_DMI_ACPIBA 0x27B4 +#define PCR_DMI_ACPIBDID 0x27B8 +#define PCR_DMI_PMBASEA 0x27AC +#define PCR_DMI_PMBASEC 0x27B0 + +#define PCR_DMI_LPCIOD 0x2770 +#define PCR_DMI_LPCIOE 0x2774 + +static void soc_config_pwrmbase(void) +{ + /* + * Assign Resources to PWRMBASE + * Clear BIT 1-2 Command Register + */ + pci_and_config16(PCH_DEV_PMC, PCI_COMMAND, ~(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER)); + + /* Program PWRM Base */ + pci_write_config32(PCH_DEV_PMC, PWRMBASE, PCH_PWRM_BASE_ADDRESS); + + /* Enable Bus Master and MMIO Space */ + pci_or_config16(PCH_DEV_PMC, PCI_COMMAND, (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER)); + + /* Enable PWRM in PMC */ + setbits32((void *) PCH_PWRM_BASE_ADDRESS + ACTL, PWRM_EN); +} + +void bootblock_pch_early_init(void) +{ + fast_spi_early_init(SPI_BASE_ADDRESS); + gspi_early_bar_init(); + p2sb_enable_bar(); + p2sb_configure_hpet(); + + /* + * Enabling PWRM Base for accessing + * Global Reset Cause Register. + */ + soc_config_pwrmbase(); +} + +static void soc_config_acpibase(void) +{ + uint32_t pmc_reg_value; + uint32_t pmc_base_reg = PCR_PSF3_TO_SHDW_PMC_REG_BASE; + + pmc_reg_value = pcr_read32(PID_PSF3, pmc_base_reg + PCR_PSFX_TO_SHDW_BAR4); + + if (pmc_reg_value != 0xffffffff) { + /* Disable Io Space before changing the address */ + pcr_rmw32(PID_PSF3, pmc_base_reg + PCR_PSFX_T0_SHDW_PCIEN, + ~PCR_PSFX_TO_SHDW_PCIEN_IOEN, 0); + /* Program ABASE in PSF3 PMC space BAR4*/ + pcr_write32(PID_PSF3, pmc_base_reg + PCR_PSFX_TO_SHDW_BAR4, + ACPI_BASE_ADDRESS); + /* Enable IO Space */ + pcr_rmw32(PID_PSF3, pmc_base_reg + PCR_PSFX_T0_SHDW_PCIEN, + ~0, PCR_PSFX_TO_SHDW_PCIEN_IOEN); + } +} + +static int pch_check_decode_enable(void) +{ + const uint32_t dmi_control = pcr_read32(PID_DMI, PCR_DMI_DMICTL); + + /* + * This cycle decoding is only allowed to set when + * DMICTL.SRLOCK is 0. + */ + if (dmi_control & PCR_DMI_DMICTL_SRLOCK) + return -1; + return 0; +} + +void pch_early_iorange_init(void) +{ + uint16_t io_enables = LPC_IOE_SUPERIO_2E_2F | LPC_IOE_KBC_60_64 | + LPC_IOE_EC_62_66 | LPC_IOE_LGE_200; + + /* IO Decode Range */ + if (CONFIG(DRIVERS_UART_8250IO)) + lpc_io_setup_comm_a_b(); + + /* IO Decode Enable */ + if (pch_check_decode_enable() == 0) { + io_enables = lpc_enable_fixed_io_ranges(io_enables); + /* + * Set ESPI IO Enables PCR[DMI] + 2774h [15:0] to the same + * value programmed in ESPI PCI offset 82h. + */ + pcr_write16(PID_DMI, PCR_DMI_LPCIOE, io_enables); + /* + * Set LPC IO Decode Ranges PCR[DMI] + 2770h [15:0] to the same + * value programmed in LPC PCI offset 80h. + */ + pcr_write16(PID_DMI, PCR_DMI_LPCIOD, lpc_get_fixed_io_decode()); + } + + /* Program generic IO Decode Range */ + pch_enable_lpc(); +} + +void pch_init(void) +{ + /* + * Enabling ABASE for accessing PM1_STS, PM1_EN, PM1_CNT, + * GPE0_STS, GPE0_EN registers. + */ + soc_config_acpibase(); + + /* Set up GPE configuration */ + pmc_gpe_init(); + + enable_rtc_upper_bank(); +} |