| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/bootblock.h> |
| #include <device/pci_ops.h> |
| #include "pch.h" |
| #include "chip.h" |
| |
| /* |
| * Enable Prefetching and Caching. |
| */ |
| static void enable_spi_prefetch(void) |
| { |
| u8 reg8; |
| pci_devfn_t dev = PCH_LPC_DEV; |
| |
| reg8 = pci_read_config8(dev, BIOS_CNTL); |
| reg8 &= ~(3 << 2); |
| reg8 |= (2 << 2); /* Prefetching and Caching Enabled */ |
| pci_write_config8(dev, BIOS_CNTL, reg8); |
| } |
| |
| static void enable_port80_on_lpc(void) |
| { |
| RCBA32(GCS) &= ~4; |
| } |
| |
| static void set_spi_speed(void) |
| { |
| u32 fdod; |
| u8 ssfc; |
| |
| /* Observe SPI Descriptor Component Section 0 */ |
| RCBA32(0x38b0) = 0x1000; |
| |
| /* Extract the Write/Erase SPI Frequency from descriptor */ |
| fdod = RCBA32(0x38b4); |
| fdod >>= 24; |
| fdod &= 7; |
| |
| /* Set Software Sequence frequency to match */ |
| ssfc = RCBA8(0x3893); |
| ssfc &= ~7; |
| ssfc |= fdod; |
| RCBA8(0x3893) = ssfc; |
| } |
| |
| static void early_lpc_init(void) |
| { |
| const struct device *dev = pcidev_on_root(0x1f, 0); |
| const struct southbridge_intel_ibexpeak_config *config = NULL; |
| |
| /* |
| * Enable some common LPC IO ranges: |
| * - 0x2e/0x2f, 0x4e/0x4f often SuperIO |
| * - 0x60/0x64, 0x62/0x66 often KBC/EC |
| * - 0x3f0-0x3f5/0x3f7 FDD |
| * - 0x378-0x37f and 0x778-0x77f LPT |
| * - 0x2f8-0x2ff COMB |
| * - 0x3f8-0x3ff COMA |
| * - 0x208-0x20f GAMEH |
| * - 0x200-0x207 GAMEL |
| */ |
| pci_write_config16(PCH_LPC_DEV, LPC_EN, CNF2_LPC_EN | CNF1_LPC_EN |
| | MC_LPC_EN | KBC_LPC_EN | GAMEH_LPC_EN |
| | GAMEL_LPC_EN | FDD_LPC_EN | LPT_LPC_EN |
| | COMB_LPC_EN | COMA_LPC_EN); |
| pci_write_config16(PCH_LPC_DEV, LPC_IO_DEC, 0x10); |
| |
| /* Clear PWR_FLR */ |
| pci_write_config8(PCH_LPC_DEV, GEN_PMCON_3, |
| (pci_read_config8(PCH_LPC_DEV, GEN_PMCON_3) & ~2) | 1); |
| |
| pci_write_config32(PCH_LPC_DEV, ETR3, |
| pci_read_config32(PCH_LPC_DEV, ETR3) & ~ETR3_CF9GR); |
| |
| /* 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 bootblock_early_southbridge_init(void) |
| { |
| enable_spi_prefetch(); |
| |
| /* Enable RCBA */ |
| pci_devfn_t lpc_dev = PCI_DEV(0, 0x1f, 0); |
| pci_write_config32(lpc_dev, RCBA, (uintptr_t)DEFAULT_RCBA | 1); |
| |
| enable_port80_on_lpc(); |
| set_spi_speed(); |
| |
| /* Enable upper 128bytes of CMOS */ |
| RCBA32(RC) = (1 << 2); |
| |
| early_lpc_init(); |
| } |