[PATCH v3 2/3] board: phytec: imx93: Add eeprom-based hardware introspection
Yannic Moog
Y.Moog at phytec.de
Wed Nov 20 09:14:36 CET 2024
On Tue, 2024-11-19 at 17:29 +0100, Christoph Stoidner wrote:
> 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>
Reviewed-by: Yannic Moog <y.moog 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);
> }
>
More information about the U-Boot
mailing list