soc/mediatek/mt8192: Do dram full calibration

If no correct params were found in flash, do dram full calibration.
Full calibration will load blob, dram.elf.
  Blob version: v3, size: 320KB.

Signed-off-by: Huayang Duan <huayang.duan@mediatek.com>
Change-Id: I2d4437a4e4c770de084927018d4dd3f2e8b87fb1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44570
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/soc/mediatek/mt8192/Makefile.inc

@@ -37,6 +37,16 @@ ramstage-y += ../common/timer.c
 ramstage-y += ../common/uart.c
 ramstage-y += ../common/usb.c usb.c
 
+MT8192_BLOB_DIR := 3rdparty/blobs/soc/mediatek/mt8192
+
+DRAM_CBFS := $(CONFIG_CBFS_PREFIX)/dram
+$(DRAM_CBFS)-file := $(MT8192_BLOB_DIR)/dram.elf
+$(DRAM_CBFS)-type := stage
+$(DRAM_CBFS)-compression := $(CBFS_PRERAM_COMPRESS_FLAG)
+ifneq ($(wildcard $($(DRAM_CBFS)-file)),)
+        cbfs-files-y += $(DRAM_CBFS)
+endif
+
 BL31_MAKEARGS += PLAT=mt8192
 
 CPPFLAGS_common += -Isrc/soc/mediatek/mt8192/include

src/soc/mediatek/mt8192/memory.c

@@ -7,6 +7,7 @@
 #include <ip_checksum.h>
 #include <soc/emi.h>
 #include <symbols.h>
+#include <timer.h>
 
 static int mt_mem_test(const struct dramc_data *dparam)
 {
@@ -41,7 +42,7 @@ static u32 compute_checksum(const struct dramc_param *dparam)
 static int dram_run_fast_calibration(const struct dramc_param *dparam)
 {
 	if (!is_valid_dramc_param(dparam)) {
-		printk(BIOS_WARNING, "Invalid DRAM calibration data from flash\n");
+		printk(BIOS_WARNING, "DRAM-K: Invalid DRAM calibration data from flash\n");
 		dump_param_header((void *)dparam);
 		return -1;
 	}
@@ -49,7 +50,7 @@ static int dram_run_fast_calibration(const struct dramc_param *dparam)
 	const u32 checksum = compute_checksum(dparam);
 	if (dparam->header.checksum != checksum) {
 		printk(BIOS_ERR,
-		       "Invalid DRAM calibration checksum from flash "
+		       "DRAM-K: Invalid DRAM calibration checksum from flash "
 		       "(expected: %#x, saved: %#x)\n",
 		       checksum, dparam->header.checksum);
 		return DRAMC_ERR_INVALID_CHECKSUM;
@@ -58,13 +59,13 @@ static int dram_run_fast_calibration(const struct dramc_param *dparam)
 	const u16 config = CONFIG(MT8192_DRAM_DVFS) ? DRAMC_ENABLE_DVFS : DRAMC_DISABLE_DVFS;
 	if (dparam->dramc_datas.ddr_info.config_dvfs != config) {
 		printk(BIOS_WARNING,
-		       "Incompatible config for calibration data from flash "
+		       "DRAM-K: Incompatible config for calibration data from flash "
 		       "(expected: %#x, saved: %#x)\n",
 		       config, dparam->dramc_datas.ddr_info.config_dvfs);
 		return -1;
 	}
 
-	printk(BIOS_INFO, "DRAM calibration data valid pass\n");
+	printk(BIOS_INFO, "DRAM-K: DRAM calibration data valid pass\n");
 	mt_set_emi(&dparam->dramc_datas);
 	if (mt_mem_test(&dparam->dramc_datas) == 0)
 		return 0;
@@ -72,6 +73,43 @@ static int dram_run_fast_calibration(const struct dramc_param *dparam)
 	return DRAMC_ERR_FAST_CALIBRATION;
 }
 
+static int dram_run_full_calibration(struct dramc_param *dparam)
+{
+	/* Load and run the provided blob for full-calibration if available */
+	struct prog dram = PROG_INIT(PROG_REFCODE, CONFIG_CBFS_PREFIX "/dram");
+
+	initialize_dramc_param(dparam);
+
+	if (prog_locate(&dram)) {
+		printk(BIOS_ERR, "DRAM-K: Locate program failed\n");
+		return -1;
+	}
+
+	if (cbfs_prog_stage_load(&dram)) {
+		printk(BIOS_ERR, "DRAM-K: CBFS load program failed\n");
+		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, "DRAM-K: Full calibration failed: status = %d\n",
+			dparam->header.status);
+		return -3;
+	}
+
+	if (!(dparam->header.flags & DRAMC_FLAG_HAS_SAVED_DATA)) {
+		printk(BIOS_ERR,
+		       "DRAM-K: Full calibration executed without saving parameters. "
+		       "Please ensure the blob is built properly.\n");
+		return -4;
+	}
+
+	return 0;
+}
+
 static void mem_init_set_default_config(struct dramc_param *dparam,
 	u32 ddr_geometry)
 {
@@ -93,23 +131,51 @@ static void mem_init_set_default_config(struct dramc_param *dparam,
 static void mt_mem_init_run(struct dramc_param_ops *dparam_ops, u32 ddr_geometry)
 {
 	struct dramc_param *dparam = dparam_ops->param;
+	struct stopwatch sw;
+	int ret;
 
 	/* Load calibration params from flash and run fast calibration */
 	mem_init_set_default_config(dparam, ddr_geometry);
 	if (dparam_ops->read_from_flash(dparam)) {
 		printk(BIOS_INFO, "DRAM-K: Running fast calibration\n");
-		if (dram_run_fast_calibration(dparam) != 0) {
+		stopwatch_init(&sw);
-			printk(BIOS_ERR, "Failed to run fast calibration\n");
+
+		ret = dram_run_fast_calibration(dparam);
+		if (ret != 0) {
+			printk(BIOS_ERR, "DRAM-K: Failed to run fast calibration "
+			       "in %ld msecs, error: %d\n",
+			       stopwatch_duration_msecs(&sw), ret);
 
 			/* Erase flash data after fast calibration failed */
 			memset(dparam, 0xa5, sizeof(*dparam));
 			dparam_ops->write_to_flash(dparam);
 		} else {
-			printk(BIOS_INFO, "Fast calibration passed\n");
+			printk(BIOS_INFO, "DRAM-K: Fast calibration passed in %ld msecs\n",
+			       stopwatch_duration_msecs(&sw));
 			return;
 		}
 	} else {
-		printk(BIOS_WARNING, "Failed to read calibration data from flash\n");
+		printk(BIOS_WARNING, "DRAM-K: Failed to read calibration data from flash\n");
+	}
+
+	/* Run full calibration */
+	printk(BIOS_INFO, "DRAM-K: Running full calibration\n");
+	mem_init_set_default_config(dparam, ddr_geometry);
+
+	stopwatch_init(&sw);
+	int err = dram_run_full_calibration(dparam);
+	if (err == 0) {
+		printk(BIOS_INFO, "DRAM-K: Full calibration passed in %ld msecs\n",
+		       stopwatch_duration_msecs(&sw));
+
+		dparam->header.checksum = compute_checksum(dparam);
+		dparam_ops->write_to_flash(dparam);
+		printk(BIOS_DEBUG, "DRAM-K: Calibration params saved to flash: "
+		       "version=%#x, size=%#x\n",
+		       dparam->header.version, dparam->header.size);
+	} else {
+		printk(BIOS_ERR, "DRAM-K: Full calibration failed in %ld msecs\n",
+		       stopwatch_duration_msecs(&sw));
 	}
 }