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/* SPDX-License-Identifier: GPL-2.0-only */
#define __SIMPLE_DEVICE__
#include <commonlib/helpers.h>
#include <console/console.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <intelblocks/cse.h>
#include <intelblocks/p2sb.h>
#include <intelblocks/pcr.h>
#include <intelblocks/pmc_ipc.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
#define CSME0_FBE 0xf
#define CSME0_BAR 0x0
#define CSME0_FID 0xb0
#define PMC_IPC_MEI_DISABLE_ID 0xa9
#define PMC_IPC_MEI_DISABLE_SUBID_ENABLE 0
#define PMC_IPC_MEI_DISABLE_SUBID_DISABLE 1
/* Disable HECI using PCR */
static void heci1_disable_using_pcr(void)
{
soc_disable_heci1_using_pcr();
}
bool cse_disable_mei_devices(void)
{
struct pmc_ipc_buffer req = { 0 };
struct pmc_ipc_buffer rsp;
uint32_t cmd;
cmd = pmc_make_ipc_cmd(PMC_IPC_MEI_DISABLE_ID, PMC_IPC_MEI_DISABLE_SUBID_DISABLE, 0);
if (pmc_send_ipc_cmd(cmd, &req, &rsp) != CB_SUCCESS) {
printk(BIOS_ERR, "CSE: Failed to disable MEI devices\n");
return false;
}
return true;
}
/* Disable HECI using PMC IPC communication */
static void heci1_disable_using_pmc(void)
{
cse_disable_mei_devices();
}
/* Disable HECI using Sideband interface communication */
static void heci1_disable_using_sbi(void)
{
struct pcr_sbi_msg msg = {
.pid = PID_CSME0,
.offset = 0,
.opcode = PCR_WRITE,
.is_posted = false,
.fast_byte_enable = CSME0_FBE,
.bar = CSME0_BAR,
.fid = CSME0_FID
};
/* Bit 0: Set to make HECI#1 Function disable */
uint32_t data32 = 1;
uint8_t response;
int status;
/* unhide p2sb device */
p2sb_unhide();
/* Send SBI command to make HECI#1 function disable */
status = pcr_execute_sideband_msg(PCH_DEV_P2SB, &msg, &data32, &response);
if (status || response)
printk(BIOS_ERR, "Fail to make CSME function disable\n");
/* Ensure to Lock SBI interface after this command */
p2sb_disable_sideband_access();
/* hide p2sb device */
p2sb_hide();
}
void heci1_disable(void)
{
if (ENV_SMM && CONFIG(SOC_INTEL_COMMON_BLOCK_HECI1_DISABLE_USING_SBI)) {
printk(BIOS_INFO, "Disabling Heci using SBI in SMM mode\n");
return heci1_disable_using_sbi();
} else if (!ENV_SMM && CONFIG(SOC_INTEL_COMMON_BLOCK_HECI1_DISABLE_USING_PMC_IPC)) {
printk(BIOS_INFO, "Disabling Heci using PMC IPC\n");
return heci1_disable_using_pmc();
} else if (!ENV_SMM && CONFIG(SOC_INTEL_COMMON_BLOCK_HECI1_DISABLE_USING_PCR)) {
printk(BIOS_INFO, "Disabling Heci using PCR\n");
return heci1_disable_using_pcr();
} else {
printk(BIOS_ERR, "%s Error: Unable to make HECI1 function disable!\n",
__func__);
}
}
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