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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <boot/coreboot_tables.h>
#include <cbfs.h>
#include <cbmem.h>
#include <console/console.h>
#include <soc/mtc.h>
#include <string.h>
static size_t mtc_table_size;
#define MAX_MTC_TABLE_ENTRIES 20
#define MTC_TABLE_ENTRY_SIZE 4880
#define MTC_TABLE_MAX_SIZE (MAX_MTC_TABLE_ENTRIES * MTC_TABLE_ENTRY_SIZE)
int tegra210_run_mtc(void)
{
ssize_t nread;
struct region_device fh;
struct cbfsf mtc_file;
void *const mtc = (void *)(uintptr_t)CONFIG_MTC_ADDRESS;
void *dvfs_table;
size_t (*mtc_fw)(void **dvfs_table) = (void *)mtc;
if (cbfs_boot_locate(&mtc_file, "tegra_mtc.bin", NULL)) {
printk(BIOS_ERR, "MTC file not found: tegra_mtc.bin\n");
return -1;
}
cbfs_file_data(&fh, &mtc_file);
/* Read MTC file into predefined region. */
nread = rdev_readat(&fh, mtc, 0, region_device_sz(&fh));
if (nread != region_device_sz(&fh)) {
printk(BIOS_ERR, "MTC bytes read (%zu) != file length(%zu)!\n",
nread, region_device_sz(&fh));
return -1;
}
printk(BIOS_INFO, "MTC: %zu bytes loaded @ %p\n", nread, mtc);
mtc_table_size = (*mtc_fw)(&dvfs_table);
if ((mtc_table_size == 0) || (mtc_table_size > MTC_TABLE_MAX_SIZE)) {
printk(BIOS_ERR, "MTC Training table size is invalid.!\n");
return -1;
}
printk(BIOS_INFO, "MTC: Done. Entries size 0x%zx located at %p\n",
mtc_table_size, dvfs_table);
void *cbmem_tab = cbmem_add(CBMEM_ID_MTC, mtc_table_size);
if (cbmem_tab == NULL) {
printk(BIOS_ERR, "MTC table allocation in cbmem failed!\n");
return -1;
}
memcpy(cbmem_tab, dvfs_table, mtc_table_size);
printk(BIOS_INFO, "MTC: Copied 0x%zx bytes from %p to %p\n",
mtc_table_size, dvfs_table, cbmem_tab);
return 0;
}
void soc_add_mtc(struct lb_header *header)
{
struct lb_range *mtc;
mtc = (struct lb_range *)lb_new_record(header);
mtc->tag = LB_TAG_MTC;
mtc->size = sizeof(*mtc);
mtc->range_start = (uintptr_t)cbmem_find(CBMEM_ID_MTC);
mtc->range_size = mtc_table_size;
}
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