[PATCH v3 2/3] board: phytec: imx93: Add eeprom-based hardware introspection
Christoph Stoidner
c.stoidner at phytec.de
Tue Nov 19 17:29:06 CET 2024
The phyCORE-i.MX 93 is available in various variants. Relevant variant
options for the spl/u-boot are:
- with or without HS400 support for the eMMC
- with 1GB ram chip, or 2GB ram chip
The phyCORE's eeprom contains all information about the existing variant
options. Add evaluation of the eeprom data to the spl/u-boot to
enable/disable HS400 and to select the appropriate ram configuration at
startup.
Signed-off-by: Christoph Stoidner <c.stoidner at phytec.de>
Reviewed-by: Wadim Egorov <w.egorov at phytec.de>
---
Cc: Mathieu Othacehe <m.othacehe at gmail.com>
Cc: Christoph Stoidner <c.stoidner at phytec.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: "NXP i.MX U-Boot Team" <uboot-imx at nxp.com>
Cc: Tom Rini <trini at konsulko.com>
Cc: Yannic Moog <y.moog at phytec.de>
Cc: Primoz Fiser <primoz.fiser at norik.com>
Cc: Andrej Picej <andrej.picej at norik.com>
Cc: Wadim Egorov <w.egorov at phytec.de>
---
Changes in v3:
- remove unwanted dts node eepromid
- correct typo in doc (PHYTEC_IMX93_VOLTAGE_3V3)
- improve enum code-style (phytec_imx93_option_index)
Changes in v2:
- encapsulate handling of feature flag VOLTAGE into own function
- move definition of enum phytec_imx93_ddr_eeprom_code into header file
arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi | 9 ++
arch/arm/mach-imx/imx9/Kconfig | 2 +
arch/arm/mach-imx/imx9/soc.c | 2 +-
board/phytec/common/Kconfig | 8 ++
board/phytec/common/Makefile | 1 +
board/phytec/common/imx93_som_detection.c | 111 ++++++++++++++++++
board/phytec/common/imx93_som_detection.h | 51 ++++++++
board/phytec/phycore_imx93/Kconfig | 28 +++++
board/phytec/phycore_imx93/MAINTAINERS | 5 +-
board/phytec/phycore_imx93/phycore-imx93.c | 51 ++++++++
board/phytec/phycore_imx93/spl.c | 48 ++++++++
11 files changed, 314 insertions(+), 2 deletions(-)
create mode 100644 board/phytec/common/imx93_som_detection.c
create mode 100644 board/phytec/common/imx93_som_detection.h
diff --git a/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi b/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
index 6897c91f4d..e001ee3288 100644
--- a/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
+++ b/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
@@ -305,4 +305,13 @@
};
};
};
+
+ eeprom at 50 {
+ bootph-pre-ram;
+ bootph-some-ram;
+ compatible = "atmel,24c32";
+ reg = <0x50>;
+ pagesize = <32>;
+ vcc-supply = <&buck4>;
+ };
};
diff --git a/arch/arm/mach-imx/imx9/Kconfig b/arch/arm/mach-imx/imx9/Kconfig
index 5c1054138f..2465e31d73 100644
--- a/arch/arm/mach-imx/imx9/Kconfig
+++ b/arch/arm/mach-imx/imx9/Kconfig
@@ -45,6 +45,8 @@ config TARGET_PHYCORE_IMX93
bool "phycore_imx93"
select IMX93
select IMX9_LPDDR4X
+ select OF_BOARD_FIXUP
+ select OF_BOARD_SETUP
endchoice
diff --git a/arch/arm/mach-imx/imx9/soc.c b/arch/arm/mach-imx/imx9/soc.c
index 21e0e7dd1e..6837ac82b0 100644
--- a/arch/arm/mach-imx/imx9/soc.c
+++ b/arch/arm/mach-imx/imx9/soc.c
@@ -634,7 +634,7 @@ static int low_drive_freq_update(void *blob)
return 0;
}
-#ifdef CONFIG_OF_BOARD_FIXUP
+#if defined(CONFIG_OF_BOARD_FIXUP) && !defined(CONFIG_TARGET_PHYCORE_IMX93)
#ifndef CONFIG_XPL_BUILD
int board_fix_fdt(void *fdt)
{
diff --git a/board/phytec/common/Kconfig b/board/phytec/common/Kconfig
index f394ace786..bc5511707a 100644
--- a/board/phytec/common/Kconfig
+++ b/board/phytec/common/Kconfig
@@ -19,6 +19,14 @@ config PHYTEC_IMX8M_SOM_DETECTION
Support of I2C EEPROM based SoM detection. Supported
for PHYTEC i.MX8MM/i.MX8MP boards
+config PHYTEC_IMX93_SOM_DETECTION
+ bool "Support SoM detection for i.MX93 PHYTEC platforms"
+ depends on ARCH_IMX9 && PHYTEC_SOM_DETECTION
+ default y
+ help
+ Support of I2C EEPROM based SoM detection. Supported
+ for PHYTEC i.MX93 based boards
+
config PHYTEC_AM62_SOM_DETECTION
bool "Support SoM detection for AM62x PHYTEC platforms"
depends on (TARGET_PHYCORE_AM62X_A53 || TARGET_PHYCORE_AM62X_R5) && \
diff --git a/board/phytec/common/Makefile b/board/phytec/common/Makefile
index cd78f7686f..8126f7356e 100644
--- a/board/phytec/common/Makefile
+++ b/board/phytec/common/Makefile
@@ -10,3 +10,4 @@ endif
obj-y += phytec_som_detection.o phytec_som_detection_blocks.o
obj-$(CONFIG_ARCH_K3) += am6_som_detection.o k3/
obj-$(CONFIG_ARCH_IMX8M) += imx8m_som_detection.o
+obj-$(CONFIG_ARCH_IMX9) += imx93_som_detection.o
diff --git a/board/phytec/common/imx93_som_detection.c b/board/phytec/common/imx93_som_detection.c
new file mode 100644
index 0000000000..eb9574d43b
--- /dev/null
+++ b/board/phytec/common/imx93_som_detection.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 PHYTEC Messtechnik GmbH
+ * Author: Primoz Fiser <primoz.fiser at norik.com>
+ */
+
+#include <asm/arch/sys_proto.h>
+#include <dm/device.h>
+#include <dm/uclass.h>
+#include <i2c.h>
+#include <u-boot/crc.h>
+
+#include "imx93_som_detection.h"
+
+extern struct phytec_eeprom_data eeprom_data;
+
+#if IS_ENABLED(CONFIG_PHYTEC_IMX93_SOM_DETECTION)
+
+/* Check if the SoM is actually one of the following products:
+ * - i.MX93
+ *
+ * Returns 0 in case it's a known SoM. Otherwise, returns 1.
+ */
+u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data)
+{
+ u8 som;
+
+ if (!data)
+ data = &eeprom_data;
+
+ /* Early API revisions are not supported */
+ if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2)
+ return 1;
+
+ som = data->payload.data.data_api2.som_no;
+ debug("%s: som id: %u\n", __func__, som);
+
+ if (som == PHYTEC_IMX93_SOM && is_imx93())
+ return 0;
+
+ pr_err("%s: SoM ID does not match. Wrong EEPROM data?\n", __func__);
+ return 1;
+}
+
+/*
+ * Filter PHYTEC i.MX93 SoM options by option index
+ *
+ * Returns:
+ * - option value
+ * - PHYTEC_EEPROM_INVAL when the data is invalid
+ *
+ */
+u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data,
+ enum phytec_imx93_option_index idx)
+{
+ char *opt;
+ u8 opt_id;
+
+ if (!data)
+ data = &eeprom_data;
+
+ if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2)
+ return PHYTEC_EEPROM_INVAL;
+
+ opt = phytec_get_opt(data);
+ if (opt)
+ opt_id = PHYTEC_GET_OPTION(opt[idx]);
+ else
+ opt_id = PHYTEC_EEPROM_INVAL;
+
+ debug("%s: opt[%d] id: %u\n", __func__, idx, opt_id);
+ return opt_id;
+}
+
+/*
+ * Filter PHYTEC i.MX93 SoM voltage
+ *
+ * Returns:
+ * - PHYTEC_IMX93_VOLTAGE_1V8 or PHYTEC_IMX93_VOLTAGE_3V3
+ * - PHYTEC_EEPROM_INVAL when the data is invalid
+ *
+ */
+enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage(struct phytec_eeprom_data *data)
+{
+ u8 option = phytec_imx93_get_opt(data, PHYTEC_IMX93_OPT_FEAT);
+
+ if (option == PHYTEC_EEPROM_INVAL)
+ return PHYTEC_IMX93_VOLTAGE_INVALID;
+ return (option & 0x01) ? PHYTEC_IMX93_VOLTAGE_1V8 : PHYTEC_IMX93_VOLTAGE_3V3;
+}
+
+#else
+
+inline u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data)
+{
+ return 1;
+}
+
+inline u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data,
+ enum phytec_imx93_option_index idx)
+{
+ return PHYTEC_EEPROM_INVAL;
+}
+
+inline enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage
+ (struct phytec_eeprom_data *data)
+{
+ return PHYTEC_EEPROM_INVAL;
+}
+
+#endif /* IS_ENABLED(CONFIG_PHYTEC_IMX93_SOM_DETECTION) */
diff --git a/board/phytec/common/imx93_som_detection.h b/board/phytec/common/imx93_som_detection.h
new file mode 100644
index 0000000000..a0803b47cb
--- /dev/null
+++ b/board/phytec/common/imx93_som_detection.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2024 PHYTEC Messtechnik GmbH
+ * Author: Primoz Fiser <primoz.fiser at norik.com>
+ */
+
+#ifndef _PHYTEC_IMX93_SOM_DETECTION_H
+#define _PHYTEC_IMX93_SOM_DETECTION_H
+
+#include "phytec_som_detection.h"
+
+#define PHYTEC_IMX93_SOM 77
+
+enum phytec_imx93_option_index {
+ PHYTEC_IMX93_OPT_DDR = 0,
+ PHYTEC_IMX93_OPT_EMMC = 1,
+ PHYTEC_IMX93_OPT_CPU = 2,
+ PHYTEC_IMX93_OPT_FREQ = 3,
+ PHYTEC_IMX93_OPT_NPU = 4,
+ PHYTEC_IMX93_OPT_DISP = 5,
+ PHYTEC_IMX93_OPT_ETH = 6,
+ PHYTEC_IMX93_OPT_FEAT = 7,
+ PHYTEC_IMX93_OPT_TEMP = 8,
+ PHYTEC_IMX93_OPT_BOOT = 9,
+ PHYTEC_IMX93_OPT_LED = 10,
+ PHYTEC_IMX93_OPT_EEPROM = 11,
+};
+
+enum phytec_imx93_voltage {
+ PHYTEC_IMX93_VOLTAGE_INVALID = PHYTEC_EEPROM_INVAL,
+ PHYTEC_IMX93_VOLTAGE_3V3 = 0,
+ PHYTEC_IMX93_VOLTAGE_1V8 = 1,
+};
+
+enum phytec_imx93_ddr_eeprom_code {
+ PHYTEC_IMX93_DDR_INVALID = PHYTEC_EEPROM_INVAL,
+ PHYTEC_IMX93_LPDDR4X_512MB = 0,
+ PHYTEC_IMX93_LPDDR4X_1GB = 1,
+ PHYTEC_IMX93_LPDDR4X_2GB = 2,
+ PHYTEC_IMX93_LPDDR4_512MB = 3,
+ PHYTEC_IMX93_LPDDR4_1GB = 4,
+ PHYTEC_IMX93_LPDDR4_2GB = 5,
+};
+
+u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data);
+u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data,
+ enum phytec_imx93_option_index idx);
+enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage
+ (struct phytec_eeprom_data *data);
+
+#endif /* _PHYTEC_IMX93_SOM_DETECTION_H */
diff --git a/board/phytec/phycore_imx93/Kconfig b/board/phytec/phycore_imx93/Kconfig
index a70104cb79..09f26e89e3 100644
--- a/board/phytec/phycore_imx93/Kconfig
+++ b/board/phytec/phycore_imx93/Kconfig
@@ -10,4 +10,32 @@ config SYS_VENDOR
config SYS_CONFIG_NAME
default "phycore_imx93"
+config PHYCORE_IMX93_RAM_TYPE_FIX
+ bool "Set phyCORE-i.MX93 RAM type and size fix instead of detecting"
+ default false
+ help
+ RAM type and size is being automatically detected with the help
+ of the PHYTEC EEPROM introspection data.
+ Set RAM type to a fix value instead.
+
+choice
+ prompt "phyCORE-i.MX93 RAM type"
+ depends on PHYCORE_IMX93_RAM_TYPE_FIX
+ default PHYCORE_IMX93_RAM_TYPE_LPDDR4X_1GB
+
+config PHYCORE_IMX93_RAM_TYPE_LPDDR4X_1GB
+ bool "LPDDR4X 1GB RAM"
+ help
+ Set RAM type fixed to LPDDR4X and RAM size fixed to 1GB
+ for phyCORE-i.MX93.
+
+config PHYCORE_IMX93_RAM_TYPE_LPDDR4X_2GB
+ bool "LPDDR4X 2GB RAM"
+ help
+ Set RAM type fixed to LPDDR4X and RAM size fixed to 2GB
+ for phyCORE-i.MX93.
+
+endchoice
+
+source "board/phytec/common/Kconfig"
endif
diff --git a/board/phytec/phycore_imx93/MAINTAINERS b/board/phytec/phycore_imx93/MAINTAINERS
index 9e91a29dc3..cea817ffdc 100644
--- a/board/phytec/phycore_imx93/MAINTAINERS
+++ b/board/phytec/phycore_imx93/MAINTAINERS
@@ -1,10 +1,13 @@
phyCORE-i.MX93
-M: Mathieu Othacehe <m.othacehe at gmail.com>
+M: Mathieu Othacehe <m.othacehe at gmail.com>
+R: Christoph Stoidner <c.stoidner at phytec.de>
W: https://www.phytec.eu/en/produkte/system-on-modules/phycore-imx-91-93/
S: Maintained
F: arch/arm/dts/imx93-phyboard-segin.dts
F: arch/arm/dts/imx93-phycore-som.dtsi
F: arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
F: board/phytec/phycore_imx93/
+F: board/phytec/common/imx93_som_detection.c
+F: board/phytec/common/imx93_som_detection.h
F: configs/imx93-phyboard-segin_defconfig
F: include/configs/phycore_imx93.h
diff --git a/board/phytec/phycore_imx93/phycore-imx93.c b/board/phytec/phycore_imx93/phycore-imx93.c
index 085c8e195a..a55795e060 100644
--- a/board/phytec/phycore_imx93/phycore-imx93.c
+++ b/board/phytec/phycore_imx93/phycore-imx93.c
@@ -3,6 +3,7 @@
* Copyright (C) 2023 PHYTEC Messtechnik GmbH
* Author: Christoph Stoidner <c.stoidner at phytec.de>
* Copyright (C) 2024 Mathieu Othacehe <m.othacehe at gmail.com>
+ * Copyright (C) 2024 PHYTEC Messtechnik GmbH
*/
#include <asm/arch-imx9/ccm_regs.h>
@@ -12,11 +13,21 @@
#include <asm/global_data.h>
#include <asm/mach-imx/boot_mode.h>
#include <env.h>
+#include <fdt_support.h>
+
+#include "../common/imx93_som_detection.h"
DECLARE_GLOBAL_DATA_PTR;
+#define EEPROM_ADDR 0x50
+
int board_init(void)
{
+ int ret = phytec_eeprom_data_setup(NULL, 2, EEPROM_ADDR);
+
+ if (ret)
+ printf("%s: EEPROM data init failed\n", __func__);
+
return 0;
}
@@ -40,3 +51,43 @@ int board_late_init(void)
return 0;
}
+
+static void emmc_fixup(void *blob, struct phytec_eeprom_data *data)
+{
+ enum phytec_imx93_voltage voltage = phytec_imx93_get_voltage(data);
+ int offset;
+
+ if (voltage == PHYTEC_IMX93_VOLTAGE_INVALID)
+ goto err;
+
+ if (voltage == PHYTEC_IMX93_VOLTAGE_1V8) {
+ offset = fdt_node_offset_by_compat_reg(blob, "fsl,imx93-usdhc",
+ 0x42850000);
+ if (offset)
+ fdt_delprop(blob, offset, "no-1-8-v");
+ else
+ goto err;
+ }
+
+ return;
+err:
+ printf("Could not detect eMMC VDD-IO. Fall back to default.\n");
+}
+
+int board_fix_fdt(void *blob)
+{
+ struct phytec_eeprom_data data;
+
+ phytec_eeprom_data_setup(&data, 2, EEPROM_ADDR);
+
+ emmc_fixup(blob, &data);
+
+ return 0;
+}
+
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+ emmc_fixup(blob, NULL);
+
+ return 0;
+}
diff --git a/board/phytec/phycore_imx93/spl.c b/board/phytec/phycore_imx93/spl.c
index 17a8736c73..a4d2aaac32 100644
--- a/board/phytec/phycore_imx93/spl.c
+++ b/board/phytec/phycore_imx93/spl.c
@@ -3,6 +3,7 @@
* Copyright (C) 2023 PHYTEC Messtechnik GmbH
* Author: Christoph Stoidner <c.stoidner at phytec.de>
* Copyright (C) 2024 Mathieu Othacehe <m.othacehe at gmail.com>
+ * Copyright (C) 2024 PHYTEC Messtechnik GmbH
*/
#include <asm/arch/clock.h>
@@ -20,6 +21,8 @@
#include <power/pca9450.h>
#include <spl.h>
+#include "../common/imx93_som_detection.h"
+
DECLARE_GLOBAL_DATA_PTR;
/*
@@ -27,6 +30,13 @@ DECLARE_GLOBAL_DATA_PTR;
* when pca9451a support is added.
*/
#define PCA9450_REG_PWRCTRL_TOFF_DEB BIT(5)
+#define EEPROM_ADDR 0x50
+
+/*
+ * Prototypes of automatically generated ram config file
+ */
+void set_dram_timings_2gb_lpddr4x(void);
+void set_dram_timings_1gb_lpddr4x_900mhz(void);
int spl_board_boot_device(enum boot_device boot_dev_spl)
{
@@ -46,6 +56,44 @@ void spl_board_init(void)
void spl_dram_init(void)
{
+ int ret;
+ enum phytec_imx93_ddr_eeprom_code ddr_opt = PHYTEC_IMX93_DDR_INVALID;
+
+ /* NOTE: In SPL lpi2c3 is mapped to bus 0 */
+ ret = phytec_eeprom_data_setup(NULL, 0, EEPROM_ADDR);
+ if (ret && !IS_ENABLED(CONFIG_PHYCORE_IMX93_RAM_TYPE_FIX))
+ goto out;
+
+ ret = phytec_imx93_detect(NULL);
+ if (!ret)
+ phytec_print_som_info(NULL);
+
+ if (IS_ENABLED(CONFIG_PHYCORE_IMX93_RAM_TYPE_FIX)) {
+ if (IS_ENABLED(CONFIG_PHYCORE_IMX93_RAM_TYPE_LPDDR4X_1GB))
+ ddr_opt = PHYTEC_IMX93_LPDDR4X_1GB;
+ else if (IS_ENABLED(CONFIG_PHYCORE_IMX93_RAM_TYPE_LPDDR4X_2GB))
+ ddr_opt = PHYTEC_IMX93_LPDDR4X_2GB;
+ } else {
+ ddr_opt = phytec_imx93_get_opt(NULL, PHYTEC_IMX93_OPT_DDR);
+ }
+
+ switch (ddr_opt) {
+ case PHYTEC_IMX93_LPDDR4X_1GB:
+ if (is_voltage_mode(VOLT_LOW_DRIVE))
+ set_dram_timings_1gb_lpddr4x_900mhz();
+ break;
+ case PHYTEC_IMX93_LPDDR4X_2GB:
+ set_dram_timings_2gb_lpddr4x();
+ break;
+ default:
+ goto out;
+ }
+ ddr_init(&dram_timing);
+ return;
+out:
+ puts("Could not detect correct RAM type and size. Fall back to default.\n");
+ if (is_voltage_mode(VOLT_LOW_DRIVE))
+ set_dram_timings_1gb_lpddr4x_900mhz();
ddr_init(&dram_timing);
}
--
2.34.1
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