board: phytec: phycore_imx8mp: Add support for different RAM sizes

Add support for different RAM sizes and speed grades on the
phyCORE-i.MX8MP.
Add support for 1GB 1.5GHz, 1GB 2GHz, 4GB 1.5GHz,
4GB 2GHz and 8GB 2GHz RAM.
The RAM size and speed grade is detected by the information
stored in the EEPROM on the SoM.

Co-developed-by: Benjamin Hahn <B.Hahn@phytec.de>
Signed-off-by: Benjamin Hahn <B.Hahn@phytec.de>
Co-developed-by: Yannic Moog <y.moog@phytec.de>
Signed-off-by: Yannic Moog <y.moog@phytec.de>
Co-developed-by: Yashwanth Varakala <y.varakala@phytec.de>
Signed-off-by: Yashwanth Varakala <y.varakala@phytec.de>
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>

4 files changed, 221 insertions, 59 deletions

diff --git a/board/phytec/phycore_imx8mp/lpddr4_timing.c b/board/phytec/phycore_imx8mp/lpddr4_timing.c
index f2707b8596..9984b6c260 100644
--- a/board/phytec/phycore_imx8mp/lpddr4_timing.c
+++ b/board/phytec/phycore_imx8mp/lpddr4_timing.c
@@ -1839,3 +1839,156 @@ struct dram_timing_info dram_timing = {
 	.ddrphy_pie_num = ARRAY_SIZE(ddr_phy_pie),
 	.fsp_table = { 3000, 400, 100, },
 };
+
+void set_dram_timings_2ghz_2gb(void)
+{
+	dram_timing.ddrc_cfg[3].val = 0x1323;
+	dram_timing.ddrc_cfg[4].val = 0x1e84800;
+	dram_timing.ddrc_cfg[5].val = 0x7a0118;
+	dram_timing.ddrc_cfg[8].val = 0xc00307a3;
+	dram_timing.ddrc_cfg[9].val = 0xc50000;
+	dram_timing.ddrc_cfg[10].val = 0xf4003f;
+	dram_timing.ddrc_cfg[11].val = 0xf30000;
+	dram_timing.ddrc_cfg[14].val = 0x2028222a;
+	dram_timing.ddrc_cfg[15].val = 0x8083f;
+	dram_timing.ddrc_cfg[16].val = 0xe0e000;
+	dram_timing.ddrc_cfg[17].val = 0x12040a12;
+	dram_timing.ddrc_cfg[18].val = 0x2050f0f;
+	dram_timing.ddrc_cfg[19].val = 0x1010009;
+	dram_timing.ddrc_cfg[20].val = 0x502;
+	dram_timing.ddrc_cfg[21].val = 0x20800;
+	dram_timing.ddrc_cfg[22].val = 0xe100002;
+	dram_timing.ddrc_cfg[23].val = 0x120;
+	dram_timing.ddrc_cfg[24].val = 0xc80064;
+	dram_timing.ddrc_cfg[25].val = 0x3e8001e;
+	dram_timing.ddrc_cfg[26].val = 0x3207a12;
+	dram_timing.ddrc_cfg[28].val = 0x4a3820e;
+	dram_timing.ddrc_cfg[30].val = 0x230e;
+	dram_timing.ddrc_cfg[37].val = 0x799;
+	dram_timing.ddrc_cfg[38].val = 0x9141d1c;
+	dram_timing.ddrc_cfg[74].val = 0x302;
+	dram_timing.ddrc_cfg[83].val = 0x599;
+	dram_timing.ddrc_cfg[99].val = 0x302;
+	dram_timing.ddrc_cfg[108].val = 0x599;
+	dram_timing.ddrphy_cfg[66].val = 0x18;
+	dram_timing.ddrphy_cfg[75].val = 0x1e3;
+	dram_timing.ddrphy_cfg[77].val = 0x1e3;
+	dram_timing.ddrphy_cfg[79].val = 0x1e3;
+	dram_timing.ddrphy_cfg[145].val = 0x3e8;
+	dram_timing.fsp_msg[0].drate = 4000;
+	dram_timing.fsp_msg[0].fsp_cfg[1].val = 0xfa0;
+	dram_timing.fsp_msg[0].fsp_cfg[10].val = 0x3ff4;
+	dram_timing.fsp_msg[0].fsp_cfg[11].val = 0xf3;
+	dram_timing.fsp_msg[0].fsp_cfg[15].val = 0x3ff4;
+	dram_timing.fsp_msg[0].fsp_cfg[16].val = 0xf3;
+	dram_timing.fsp_msg[0].fsp_cfg[22].val = 0xf400;
+	dram_timing.fsp_msg[0].fsp_cfg[23].val = 0xf33f;
+	dram_timing.fsp_msg[0].fsp_cfg[28].val = 0xf400;
+	dram_timing.fsp_msg[0].fsp_cfg[29].val = 0xf33f;
+	dram_timing.fsp_msg[3].drate = 4000;
+	dram_timing.fsp_msg[3].fsp_cfg[1].val = 0xfa0;
+	dram_timing.fsp_msg[3].fsp_cfg[11].val = 0x3ff4;
+	dram_timing.fsp_msg[3].fsp_cfg[12].val = 0xf3;
+	dram_timing.fsp_msg[3].fsp_cfg[16].val = 0x3ff4;
+	dram_timing.fsp_msg[3].fsp_cfg[17].val = 0xf3;
+	dram_timing.fsp_msg[3].fsp_cfg[23].val = 0xf400;
+	dram_timing.fsp_msg[3].fsp_cfg[24].val = 0xf33f;
+	dram_timing.fsp_msg[3].fsp_cfg[29].val = 0xf400;
+	dram_timing.fsp_msg[3].fsp_cfg[30].val = 0xf33f;
+	dram_timing.ddrphy_pie[480].val = 0x465;
+	dram_timing.ddrphy_pie[481].val = 0xfa;
+	dram_timing.ddrphy_pie[482].val = 0x9c4;
+	dram_timing.fsp_table[0] = 4000;
+}
+
+void set_dram_timings_1_5ghz_1gb(void)
+{
+	dram_timing.ddrc_cfg[3].val = 0x1233;
+	dram_timing.ddrc_cfg[5].val = 0x5b0087;
+	dram_timing.ddrc_cfg[6].val = 0x61027f10;
+	dram_timing.ddrc_cfg[7].val = 0x7b0;
+	dram_timing.ddrc_cfg[11].val = 0xf30000;
+	dram_timing.ddrc_cfg[23].val = 0x8d;
+	dram_timing.ddrc_cfg[45].val = 0xf070707;
+	dram_timing.ddrc_cfg[59].val = 0x1031;
+	dram_timing.ddrc_cfg[62].val = 0xc0012;
+	dram_timing.ddrc_cfg[77].val = 0x13;
+	dram_timing.ddrc_cfg[84].val = 0x1031;
+	dram_timing.ddrc_cfg[87].val = 0x30005;
+	dram_timing.ddrc_cfg[102].val = 0x5;
+	dram_timing.ddrphy_cfg[75].val = 0x1e3;
+	dram_timing.ddrphy_cfg[77].val = 0x1e3;
+	dram_timing.ddrphy_cfg[79].val = 0x1e3;
+	dram_timing.fsp_msg[0].fsp_cfg[11].val = 0xf3;
+	dram_timing.fsp_msg[0].fsp_cfg[16].val = 0xf3;
+	dram_timing.fsp_msg[0].fsp_cfg[23].val = 0xf32d;
+	dram_timing.fsp_msg[0].fsp_cfg[29].val = 0xf32d;
+	dram_timing.fsp_msg[3].fsp_cfg[12].val = 0xf3;
+	dram_timing.fsp_msg[3].fsp_cfg[17].val = 0xf3;
+	dram_timing.fsp_msg[3].fsp_cfg[24].val = 0xf32d;
+	dram_timing.fsp_msg[3].fsp_cfg[30].val = 0xf32d;
+}
+
+void set_dram_timings_2ghz_1gb(void)
+{
+	set_dram_timings_2ghz_2gb();
+	dram_timing.ddrc_cfg[5].val = 0x7a00b4;
+	dram_timing.ddrc_cfg[23].val = 0xbc;
+	dram_timing.ddrc_cfg[45].val = 0xf070707;
+	dram_timing.ddrc_cfg[62].val = 0xc0012;
+	dram_timing.ddrc_cfg[77].val = 0x13;
+	dram_timing.ddrc_cfg[87].val = 0x30005;
+	dram_timing.ddrc_cfg[102].val = 0x5;
+}
+
+void set_dram_timings_1_5ghz_4gb(void)
+{
+	dram_timing.ddrc_cfg[2].val = 0xa3080020;
+	dram_timing.ddrc_cfg[39].val = 0x17;
+	dram_timing.fsp_msg[0].fsp_cfg[9].val = 0x310;
+	dram_timing.fsp_msg[0].fsp_cfg[21].val = 0x3;
+	dram_timing.fsp_msg[1].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[1].fsp_cfg[22].val = 0x3;
+	dram_timing.fsp_msg[2].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[2].fsp_cfg[22].val = 0x3;
+	dram_timing.fsp_msg[3].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[3].fsp_cfg[22].val = 0x3;
+}
+
+void set_dram_timings_2ghz_4gb(void)
+{
+	set_dram_timings_2ghz_2gb();
+	dram_timing.ddrc_cfg[2].val = 0xa3080020;
+	dram_timing.ddrc_cfg[39].val = 0x17;
+	dram_timing.fsp_msg[0].fsp_cfg[9].val = 0x310;
+	dram_timing.fsp_msg[0].fsp_cfg[21].val = 0x3;
+	dram_timing.fsp_msg[1].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[1].fsp_cfg[22].val = 0x3;
+	dram_timing.fsp_msg[2].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[2].fsp_cfg[22].val = 0x3;
+	dram_timing.fsp_msg[3].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[3].fsp_cfg[22].val = 0x3;
+}
+
+void set_dram_timings_2ghz_8gb(void)
+{
+	set_dram_timings_2ghz_2gb();
+	dram_timing.ddrc_cfg[2].val = 0xa3080020;
+	dram_timing.ddrc_cfg[5].val = 0x7a017c;
+	dram_timing.ddrc_cfg[23].val = 0x184;
+	dram_timing.ddrc_cfg[39].val = 0x18;
+	dram_timing.ddrc_cfg[46].val = 0xf07;
+	dram_timing.ddrc_cfg[62].val = 0xc0026;
+	dram_timing.ddrc_cfg[77].val = 0x27;
+	dram_timing.ddrc_cfg[87].val = 0x3000a;
+	dram_timing.ddrc_cfg[102].val = 0xa;
+
+	dram_timing.fsp_msg[0].fsp_cfg[9].val = 0x310;
+	dram_timing.fsp_msg[0].fsp_cfg[21].val = 0x3;
+	dram_timing.fsp_msg[1].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[1].fsp_cfg[22].val = 0x3;
+	dram_timing.fsp_msg[2].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[2].fsp_cfg[22].val = 0x3;
+	dram_timing.fsp_msg[3].fsp_cfg[10].val = 0x310;
+	dram_timing.fsp_msg[3].fsp_cfg[22].val = 0x3;
+}
diff --git a/board/phytec/phycore_imx8mp/lpddr4_timing.h b/board/phytec/phycore_imx8mp/lpddr4_timing.h
new file mode 100644
index 0000000000..1c10e085a9
--- /dev/null
+++ b/board/phytec/phycore_imx8mp/lpddr4_timing.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2024 PHYTEC Messtechnik GmbH
+ */
+
+#ifndef __LPDDR4_TIMING_H__
+#define __LPDDR4_TIMING_H__
+
+void set_dram_timings_2ghz_2gb(void);
+void set_dram_timings_2ghz_1gb(void);
+void set_dram_timings_2ghz_4gb(void);
+void set_dram_timings_1_5ghz_1gb(void);
+void set_dram_timings_1_5ghz_4gb(void);
+void set_dram_timings_2ghz_8gb(void);
+
+#endif /* __LPDDR4_TIMING_H__ */
diff --git a/board/phytec/phycore_imx8mp/phycore-imx8mp.c b/board/phytec/phycore_imx8mp/phycore-imx8mp.c
index 3568359143..ef95136184 100644
--- a/board/phytec/phycore_imx8mp/phycore-imx8mp.c
+++ b/board/phytec/phycore_imx8mp/phycore-imx8mp.c
@@ -9,6 +9,7 @@
 #include <asm/io.h>
 #include <asm/mach-imx/boot_mode.h>
 #include <env.h>
+#include <init.h>
 #include <miiphy.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -55,3 +56,13 @@ int board_late_init(void)
 
 	return 0;
 }
+
+int board_phys_sdram_size(phys_size_t *size)
+{
+	if (!size)
+		return -EINVAL;
+
+	*size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE + PHYS_SDRAM_2_SIZE);
+
+	return 0;
+}
diff --git a/board/phytec/phycore_imx8mp/spl.c b/board/phytec/phycore_imx8mp/spl.c
index cffa0a57fe..855aa1a900 100644
--- a/board/phytec/phycore_imx8mp/spl.c
+++ b/board/phytec/phycore_imx8mp/spl.c
@@ -20,6 +20,7 @@
 #include <power/pca9450.h>
 #include <spl.h>
 
+#include "lpddr4_timing.h"
 #include "../common/imx8m_som_detection.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -32,9 +33,19 @@ int spl_board_boot_device(enum boot_device boot_dev_spl)
 	return BOOT_DEVICE_BOOTROM;
 }
 
+enum phytec_imx8mp_ddr_eeprom_code {
+	PHYTEC_IMX8MP_DDR_1GB = 2,
+	PHYTEC_IMX8MP_DDR_2GB = 3,
+	PHYTEC_IMX8MP_DDR_4GB = 5,
+	PHYTEC_IMX8MP_DDR_8GB = 7,
+	PHYTEC_IMX8MP_DDR_4GB_2GHZ = 8,
+};
+
 void spl_dram_init(void)
 {
 	int ret;
+	bool use_2ghz_timings = false;
+	enum phytec_imx8mp_ddr_eeprom_code size = PHYTEC_EEPROM_INVAL;
 
 	ret = phytec_eeprom_data_setup_fallback(NULL, 0, EEPROM_ADDR,
 						EEPROM_ADDR_FALLBACK);
@@ -48,67 +59,38 @@ void spl_dram_init(void)
 	u8 rev = phytec_get_rev(NULL);
 	u8 somtype = phytec_get_som_type(NULL);
 
-	if (rev != PHYTEC_EEPROM_INVAL && (rev >= 3 || (somtype == SOM_TYPE_PCL && rev >= 1))) {
-		dram_timing.ddrc_cfg[3].val = 0x1323;
-		dram_timing.ddrc_cfg[4].val = 0x1e84800;
-		dram_timing.ddrc_cfg[5].val = 0x7a0118;
-		dram_timing.ddrc_cfg[8].val = 0xc00307a3;
-		dram_timing.ddrc_cfg[9].val = 0xc50000;
-		dram_timing.ddrc_cfg[10].val = 0xf4003f;
-		dram_timing.ddrc_cfg[11].val = 0xf30000;
-		dram_timing.ddrc_cfg[14].val = 0x2028222a;
-		dram_timing.ddrc_cfg[15].val = 0x8083f;
-		dram_timing.ddrc_cfg[16].val = 0xe0e000;
-		dram_timing.ddrc_cfg[17].val = 0x12040a12;
-		dram_timing.ddrc_cfg[18].val = 0x2050f0f;
-		dram_timing.ddrc_cfg[19].val = 0x1010009;
-		dram_timing.ddrc_cfg[20].val = 0x502;
-		dram_timing.ddrc_cfg[21].val = 0x20800;
-		dram_timing.ddrc_cfg[22].val = 0xe100002;
-		dram_timing.ddrc_cfg[23].val = 0x120;
-		dram_timing.ddrc_cfg[24].val = 0xc80064;
-		dram_timing.ddrc_cfg[25].val = 0x3e8001e;
-		dram_timing.ddrc_cfg[26].val = 0x3207a12;
-		dram_timing.ddrc_cfg[28].val = 0x4a3820e;
-		dram_timing.ddrc_cfg[30].val = 0x230e;
-		dram_timing.ddrc_cfg[37].val = 0x799;
-		dram_timing.ddrc_cfg[38].val = 0x9141d1c;
-		dram_timing.ddrc_cfg[74].val = 0x302;
-		dram_timing.ddrc_cfg[83].val = 0x599;
-		dram_timing.ddrc_cfg[99].val = 0x302;
-		dram_timing.ddrc_cfg[108].val = 0x599;
-		dram_timing.ddrphy_cfg[66].val = 0x18;
-		dram_timing.ddrphy_cfg[75].val = 0x1e3;
-		dram_timing.ddrphy_cfg[77].val = 0x1e3;
-		dram_timing.ddrphy_cfg[79].val = 0x1e3;
-		dram_timing.ddrphy_cfg[145].val = 0x3e8;
-		dram_timing.fsp_msg[0].drate = 4000;
-		dram_timing.fsp_msg[0].fsp_cfg[1].val = 0xfa0;
-		dram_timing.fsp_msg[0].fsp_cfg[10].val = 0x3ff4;
-		dram_timing.fsp_msg[0].fsp_cfg[11].val = 0xf3;
-		dram_timing.fsp_msg[0].fsp_cfg[15].val = 0x3ff4;
-		dram_timing.fsp_msg[0].fsp_cfg[16].val = 0xf3;
-		dram_timing.fsp_msg[0].fsp_cfg[22].val = 0xf400;
-		dram_timing.fsp_msg[0].fsp_cfg[23].val = 0xf33f;
-		dram_timing.fsp_msg[0].fsp_cfg[28].val = 0xf400;
-		dram_timing.fsp_msg[0].fsp_cfg[29].val = 0xf33f;
-		dram_timing.fsp_msg[3].drate = 4000;
-		dram_timing.fsp_msg[3].fsp_cfg[1].val = 0xfa0;
-		dram_timing.fsp_msg[3].fsp_cfg[11].val = 0x3ff4;
-		dram_timing.fsp_msg[3].fsp_cfg[12].val = 0xf3;
-		dram_timing.fsp_msg[3].fsp_cfg[16].val = 0x3ff4;
-		dram_timing.fsp_msg[3].fsp_cfg[17].val = 0xf3;
-		dram_timing.fsp_msg[3].fsp_cfg[23].val = 0xf400;
-		dram_timing.fsp_msg[3].fsp_cfg[24].val = 0xf33f;
-		dram_timing.fsp_msg[3].fsp_cfg[29].val = 0xf400;
-		dram_timing.fsp_msg[3].fsp_cfg[30].val = 0xf33f;
-		dram_timing.ddrphy_pie[480].val = 0x465;
-		dram_timing.ddrphy_pie[481].val = 0xfa;
-		dram_timing.ddrphy_pie[482].val = 0x9c4;
-		dram_timing.fsp_table[0] = 4000;
+	if (rev != PHYTEC_EEPROM_INVAL && (rev >= 3 || (somtype == SOM_TYPE_PCL && rev >= 1)))
+		use_2ghz_timings = true;
+
+	size = phytec_get_imx8m_ddr_size(NULL);
+
+	switch (size) {
+	case PHYTEC_IMX8MP_DDR_1GB:
+		if (use_2ghz_timings)
+			set_dram_timings_2ghz_1gb();
+		else
+			set_dram_timings_1_5ghz_1gb();
+		break;
+	case PHYTEC_IMX8MP_DDR_2GB:
+		if (use_2ghz_timings)
+			set_dram_timings_2ghz_2gb();
+		break;
+	case PHYTEC_IMX8MP_DDR_4GB:
+		set_dram_timings_1_5ghz_4gb();
+		break;
+	case PHYTEC_IMX8MP_DDR_4GB_2GHZ:
+		set_dram_timings_2ghz_4gb();
+		break;
+	case PHYTEC_IMX8MP_DDR_8GB:
+		set_dram_timings_2ghz_8gb();
+		break;
+	default:
+		goto out;
 	}
-
+	ddr_init(&dram_timing);
+	return;
 out:
+	printf("Could not detect correct RAM size. Fallback to default.\n");
 	ddr_init(&dram_timing);
 }