[PATCH v2 2/3] board: phytec: imx93: Add eeprom-based hardware introspection
Christoph Stoidner
C.Stoidner at phytec.de
Tue Nov 19 10:35:19 CET 2024
On Do, 2024-11-14 at 09:37 +0100, Primoz Fiser wrote:
> Hi Christoph,
>
> On 13. 11. 24 17:00, 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>
> > ---
> > 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 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 | 19 +++
> > 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, 324 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..25c778bb07 100644
> > --- a/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
> > +++ b/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
> > @@ -305,4 +305,23 @@
> > };
> > };
> > };
> > +
> > + eeprom at 50 {
> > + bootph-pre-ram;
> > + bootph-some-ram;
> > + compatible = "atmel,24c32";
> > + reg = <0x50>;
> > + pagesize = <32>;
> > + vcc-supply = <&buck4>;
> > + };
> > +
> > + eepromid at 58 {
> > + bootph-pre-ram;
> > + bootph-some-ram;
> > + compatible = "atmel,24c32";
> > + pagesize = <32>;
> > + reg = <0x58>;
> > + size = <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 7c28fa39e1..237354f507 100644
> > --- a/arch/arm/mach-imx/imx9/soc.c
> > +++ b/arch/arm/mach-imx/imx9/soc.c
> > @@ -628,7 +628,7 @@ 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..a28cdf6b51
> > --- /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_3V8
>
> typo here:
>
> s/PHYTEC_IMX93_VOLTAGE_3V8/PHYTEC_IMX93_VOLTAGE_3V3
>
> Otherwise LGTM.
I will send a v3 for it.
Thanks
>
> > + * - 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..6d3d9283d8
> > --- /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,
> > + PHYTEC_IMX93_OPT_CPU,
> > + PHYTEC_IMX93_OPT_FREQ,
> > + PHYTEC_IMX93_OPT_NPU,
> > + PHYTEC_IMX93_OPT_DISP,
> > + PHYTEC_IMX93_OPT_ETH,
> > + PHYTEC_IMX93_OPT_FEAT,
> > + PHYTEC_IMX93_OPT_TEMP,
> > + PHYTEC_IMX93_OPT_BOOT,
> > + PHYTEC_IMX93_OPT_LED,
> > + PHYTEC_IMX93_OPT_EEPROM,
> > +};
> > +
> > +enum phytec_imx93_voltage {
> > + PHYTEC_IMX93_VOLTAGE_INVALID = PHYTEC_EEPROM_INVAL,
> > + PHYTEC_IMX93_VOLTAGE_3V3 = 0,
> > + PHYTEC_IMX93_VOLTAGE_1V8,
> > +};
> > +
> > +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);
> > }
> >
>
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