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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <stdint.h>
#include "me.h"
#include "pch.h"
/* Send END OF POST message to the ME */
static int me8_mkhi_end_of_post(void)
{
struct mkhi_header mkhi = {
.group_id = MKHI_GROUP_ID_GEN,
.command = MKHI_END_OF_POST,
};
struct mei_header mei = {
.is_complete = 1,
.host_address = MEI_HOST_ADDRESS,
.client_address = MEI_ADDRESS_MKHI,
.length = sizeof(mkhi),
};
u32 eop_ack;
/* Send request and wait for response */
printk(BIOS_NOTICE, "ME: %s\n", __func__);
if (mei_sendrecv(&mei, &mkhi, NULL, &eop_ack, sizeof(eop_ack)) < 0) {
printk(BIOS_ERR, "ME: END OF POST message failed\n");
return -1;
}
printk(BIOS_INFO, "ME: END OF POST message successful (%d)\n", eop_ack);
return 0;
}
/* Send END OF POST message to the ME */
static int me7_mkhi_end_of_post(void)
{
struct mkhi_header mkhi = {
.group_id = MKHI_GROUP_ID_GEN,
.command = MKHI_END_OF_POST,
};
struct mei_header mei = {
.is_complete = 1,
.host_address = MEI_HOST_ADDRESS,
.client_address = MEI_ADDRESS_MKHI,
.length = sizeof(mkhi),
};
/* Send request and wait for response */
if (mei_sendrecv(&mei, &mkhi, NULL, NULL, 0) < 0) {
printk(BIOS_ERR, "ME: END OF POST message failed\n");
return -1;
}
printk(BIOS_INFO, "ME: END OF POST message successful\n");
return 0;
}
void intel_me_finalize_smm(void)
{
union me_hfs hfs;
update_mei_base_address();
/* S3 path will have hidden this device already */
if (!is_mei_base_address_valid())
return;
/* Make sure ME is in a mode that expects EOP */
hfs.raw = pci_read_config32(PCH_ME_DEV, PCI_ME_HFS);
/* Abort and leave device alone if not normal mode */
if (hfs.fpt_bad ||
hfs.working_state != ME_HFS_CWS_NORMAL ||
hfs.operation_mode != ME_HFS_MODE_NORMAL)
return;
/* Try to send EOP command so ME stops accepting other commands */
const u16 did = pci_read_config16(PCH_ME_DEV, PCI_DEVICE_ID);
switch (did) {
case 0x1c3a:
me7_mkhi_end_of_post();
break;
case 0x1e3a:
me8_mkhi_end_of_post();
break;
default:
printk(BIOS_ERR, "No finalize handler for ME %04x.\n", did);
}
/* Make sure IO is disabled */
pci_and_config16(PCH_ME_DEV, PCI_COMMAND,
~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO));
/* Hide the PCI device */
RCBA32_OR(FD2, PCH_DISABLE_MEI1);
}
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