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/*
* This file is part of the coreboot project.
*
* Copyright 2018 MediaTek Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <assert.h>
#include <cbfs.h>
#include <console/console.h>
#include <ip_checksum.h>
#include <security/vboot/vboot_common.h>
#include <soc/dramc_param.h>
#include <soc/dramc_pi_api.h>
#include <soc/emi.h>
#include <symbols.h>
static int mt_mem_test(void)
{
u64 rank_size[RANK_MAX];
if (CONFIG(MEMORY_TEST)) {
size_t r;
u8 *addr = _dram;
dramc_get_rank_size(rank_size);
for (r = RANK_0; r < RANK_MAX; r++) {
int i;
if (rank_size[r] == 0)
break;
i = complex_mem_test(addr, 0x2000);
printk(BIOS_DEBUG, "[MEM] complex R/W mem test %s : %d\n",
(i == 0) ? "pass" : "fail", i);
if (i != 0) {
printk(BIOS_ERR, "DRAM memory test failed\n");
return -1;
}
addr += rank_size[r];
}
}
return 0;
}
static void dump_param_header(const struct dramc_param *dparam)
{
const struct dramc_param_header *header = &dparam->header;
printk(BIOS_DEBUG, "header.status = %#x\n", header->status);
printk(BIOS_DEBUG, "header.magic = %#x (expected: %#x)\n",
header->magic, DRAMC_PARAM_HEADER_MAGIC);
printk(BIOS_DEBUG, "header.version = %#x (expected: %#x)\n",
header->version, DRAMC_PARAM_HEADER_VERSION);
printk(BIOS_DEBUG, "header.size = %#x (expected: %#lx)\n",
header->size, sizeof(*dparam));
printk(BIOS_DEBUG, "header.config = %#x\n", header->config);
printk(BIOS_DEBUG, "header.flags = %#x\n", header->flags);
printk(BIOS_DEBUG, "header.checksum = %#x\n", header->checksum);
}
static u32 compute_checksum(const struct dramc_param *dparam)
{
return (u32)compute_ip_checksum(dparam->freq_params,
sizeof(dparam->freq_params));
}
static int dram_run_fast_calibration(const struct dramc_param *dparam,
u16 config)
{
if (!is_valid_dramc_param(dparam)) {
printk(BIOS_WARNING,
"Invalid DRAM calibration data from flash\n");
dump_param_header(dparam);
return -1;
}
if (dparam->header.config != config) {
printk(BIOS_WARNING,
"Incompatible config for calibration data from flash "
"(expected: %#x, saved: %#x)\n",
config, dparam->header.config);
return -1;
}
const u32 checksum = compute_checksum(dparam);
if (dparam->header.checksum != checksum) {
printk(BIOS_ERR,
"Invalid DRAM calibration checksum from flash "
"(expected: %#x, saved: %#x)\n",
checksum, dparam->header.checksum);
return -1;
}
return 0;
}
static int dram_run_full_calibration(struct dramc_param *dparam, u16 config)
{
initialize_dramc_param(dparam, config);
/* Load and run the provided blob for full-calibration if available */
struct prog dram = PROG_INIT(PROG_REFCODE, CONFIG_CBFS_PREFIX "/dram");
if (prog_locate(&dram))
return -1;
if (cbfs_prog_stage_load(&dram))
return -2;
dparam->do_putc = do_putchar;
prog_set_entry(&dram, prog_entry(&dram), dparam);
prog_run(&dram);
if (dparam->header.status != DRAMC_SUCCESS) {
printk(BIOS_ERR, "Full calibration failed: status = %d\n",
dparam->header.status);
return -3;
}
if (!(dparam->header.flags & DRAMC_FLAG_HAS_SAVED_DATA)) {
printk(BIOS_ERR,
"Full calibration executed without saving parameters. "
"Please ensure the blob is built properly.\n");
return -4;
}
return 0;
}
static void set_source_to_flash(struct sdram_params *freq_params)
{
for (u8 shuffle = DRAM_DFS_SHUFFLE_1; shuffle < DRAM_DFS_SHUFFLE_MAX;
shuffle++)
freq_params[shuffle].source = DRAMC_PARAM_SOURCE_FLASH;
}
static void init_sdram_params(struct sdram_params *dst,
const struct sdram_params *src)
{
for (u8 shuffle = DRAM_DFS_SHUFFLE_1; shuffle < DRAM_DFS_SHUFFLE_MAX;
shuffle++)
memcpy(&dst[shuffle], src, sizeof(*dst));
}
void mt_mem_init(struct dramc_param_ops *dparam_ops)
{
struct dramc_param *dparam = dparam_ops->param;
u16 config = 0;
if (CONFIG(MT8183_DRAM_EMCP))
config |= DRAMC_CONFIG_EMCP;
const bool recovery_mode = vboot_recovery_mode_enabled();
/* DRAM DVFS is disabled in recovery mode */
if (CONFIG(MT8183_DRAM_DVFS) && !recovery_mode)
config |= DRAMC_CONFIG_DVFS;
/* Load calibration params from flash and run fast calibration */
if (recovery_mode) {
printk(BIOS_WARNING, "Skip loading cached calibration data\n");
if (vboot_recovery_mode_memory_retrain() ||
vboot_check_recovery_request() == VB2_RECOVERY_TRAIN_AND_REBOOT) {
printk(BIOS_WARNING, "Retrain memory in next boot\n");
/* Use 0xFF as erased flash data. */
memset(dparam, 0xff, sizeof(*dparam));
dparam_ops->write_to_flash(dparam);
}
} else if (dparam_ops->read_from_flash(dparam)) {
printk(BIOS_INFO, "DRAM-K: Fast Calibration\n");
if (dram_run_fast_calibration(dparam, config) == 0) {
printk(BIOS_INFO,
"Calibration params loaded from flash\n");
if (mt_set_emi(dparam) == 0 && mt_mem_test() == 0)
return;
} else {
printk(BIOS_ERR,
"Failed to apply cached calibration data\n");
}
} else {
printk(BIOS_WARNING,
"Failed to read calibration data from flash\n");
}
/* Run full calibration */
printk(BIOS_INFO, "DRAM-K: Full Calibration\n");
int err = dram_run_full_calibration(dparam, config);
if (err == 0) {
printk(BIOS_INFO, "Successfully loaded DRAM blobs and "
"ran DRAM calibration\n");
/*
* In recovery mode the system boots in RO but the flash params
* should be calibrated for RW so we can't mix them up.
*/
if (!recovery_mode) {
set_source_to_flash(dparam->freq_params);
dparam->header.checksum = compute_checksum(dparam);
dparam_ops->write_to_flash(dparam);
printk(BIOS_DEBUG, "Calibration params saved to flash: "
"version=%#x, size=%#x\n",
dparam->header.version, dparam->header.size);
}
return;
}
printk(BIOS_ERR, "Failed to do full calibration (%d), "
"falling back to load default sdram param\n", err);
/* Init params from sdram configs and run partial calibration */
printk(BIOS_INFO, "DRAM-K: Partial Calibration\n");
init_sdram_params(dparam->freq_params, get_sdram_config());
if (mt_set_emi(dparam) != 0)
die("Set emi failed with params from sdram config\n");
if (mt_mem_test() != 0)
die("Memory test failed with params from sdram config\n");
}
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