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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdint.h>
#include <arch/bootblock.h>
#include <amdblocks/acpimmio.h>
#include <device/pci_ops.h>
#include <southbridge/amd/pi/hudson/hudson.h>
/*
* Enable 4MB (LPC) ROM access at 0xFFC00000 - 0xFFFFFFFF.
*
* Hardware should enable LPC ROM by pin straps. This function does not
* handle the theoretically possible PCI ROM, FWH, or SPI ROM configurations.
*
* The HUDSON power-on default is to map 512K ROM space.
*
*/
static void hudson_enable_rom(void)
{
u8 reg8;
const pci_devfn_t dev = PCI_DEV(0, 0x14, 3);
/* Decode variable LPC ROM address ranges 1 and 2. */
reg8 = pci_s_read_config8(dev, 0x48);
reg8 |= (1 << 3) | (1 << 4);
pci_s_write_config8(dev, 0x48, reg8);
/* LPC ROM address range 1: */
/* Enable LPC ROM range mirroring start at 0x000e(0000). */
pci_s_write_config16(dev, 0x68, 0x000e);
/* Enable LPC ROM range mirroring end at 0x000f(ffff). */
pci_s_write_config16(dev, 0x6a, 0x000f);
/* LPC ROM address range 2: */
/*
* Enable LPC ROM range start at:
* 0xfff8(0000): 512KB
* 0xfff0(0000): 1MB
* 0xffe0(0000): 2MB
* 0xffc0(0000): 4MB
*/
pci_s_write_config16(dev, 0x6c, 0x10000 - (CONFIG_COREBOOT_ROMSIZE_KB >> 6));
/* Enable LPC ROM range end at 0xffff(ffff). */
pci_s_write_config16(dev, 0x6e, 0xffff);
}
void bootblock_early_southbridge_init(void)
{
u32 data;
hudson_enable_rom();
if (CONFIG(SOUTHBRIDGE_AMD_PI_BOLTON))
enable_acpimmio_decode_pm24();
else
enable_acpimmio_decode_pm04();
hudson_lpc_decode();
if (CONFIG(POST_DEVICE_PCI_PCIE))
hudson_pci_port80();
else if (CONFIG(POST_DEVICE_LPC))
hudson_lpc_port80();
const pci_devfn_t dev = PCI_DEV(0, 0x14, 3);
data = pci_read_config32(dev, LPC_IO_OR_MEM_DECODE_ENABLE);
/* enable 0x2e/0x4e IO decoding for SuperIO */
pci_write_config32(dev, LPC_IO_OR_MEM_DECODE_ENABLE, data | 3);
/*
* Enable FCH to decode TPM associated Memory and IO regions for vboot
*
* Enable decoding of TPM cycles defined in TPM 1.2 spec
* Enable decoding of legacy TPM addresses: IO addresses 0x7f-
* 0x7e and 0xef-0xee.
*/
data = pci_read_config32(dev, LPC_TRUSTED_PLATFORM_MODULE);
data |= TPM_12_EN | TPM_LEGACY_EN;
pci_write_config32(dev, LPC_TRUSTED_PLATFORM_MODULE, data);
/*
* In Hudson RRG, PMIOxD2[5:4] is "Drive strength control for
* LpcClk[1:0]". This following register setting has been
* replicated in every reference design since Parmer, so it is
* believed to be required even though it is not documented in
* the SoC BKDGs. Without this setting, there is no serial
* output.
*/
pm_write8(0xd2, 0);
}
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