| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/bootblock.h> |
| #include <device/pci_ops.h> |
| #include <southbridge/intel/common/early_spi.h> |
| #include "pch.h" |
| |
| static void map_rcba(void) |
| { |
| pci_write_config32(PCH_LPC_DEV, RCBA, CONFIG_FIXED_RCBA_MMIO_BASE | 1); |
| } |
| |
| static void enable_port80_on_lpc(void) |
| { |
| /* Enable port 80 POST on LPC. The chipset does this by default, |
| * but it doesn't appear to hurt anything. */ |
| u32 gcs = RCBA32(GCS); |
| gcs = gcs & ~0x4; |
| RCBA32(GCS) = gcs; |
| } |
| |
| static void set_spi_speed(void) |
| { |
| u32 fdod; |
| u8 ssfc; |
| |
| /* Observe SPI Descriptor Component Section 0 */ |
| SPIBAR32(FDOC) = 0x1000; |
| |
| /* Extract the Write/Erase SPI Frequency from descriptor */ |
| fdod = SPIBAR32(FDOD); |
| fdod >>= 24; |
| fdod &= 7; |
| |
| /* Set Software Sequence frequency to match */ |
| ssfc = SPIBAR8(SSFC + 2); |
| ssfc &= ~7; |
| ssfc |= fdod; |
| SPIBAR8(SSFC + 2) = ssfc; |
| } |
| |
| void bootblock_early_southbridge_init(void) |
| { |
| map_rcba(); |
| enable_spi_prefetching_and_caching(); |
| enable_port80_on_lpc(); |
| set_spi_speed(); |
| |
| /* Enable upper 128bytes of CMOS */ |
| RCBA32(RC) = (1 << 2); |
| |
| pch_enable_lpc(); |
| mainboard_config_superio(); |
| } |