Hi Sam,
On Sun, Jan 09, 2022 at 08:53:49PM +0100, Sam Ravnborg wrote:
> Hi,
> >
> > Can anyone (Ahmad?) help me a little how to get the bootstrap
> > functionality working on the at91sam9263?
>
> To answer the obvious questions - what have I done so far.
>
> - I have an at91bootstrap generated BOOT.BIN that works.
> This ruins out a lot of possible issues with the SD card
> as the board boots from the SD card with the at91bootstrap based
> BOOT.BIN.
>
> - The toolchain used is generated from buildroot, and I do not have any
> proof that it works as I have not had any successes.
> So far I have assumed that it works.
>
> - The configuration used is pasted below.
>
> - The board I use is the skov-arm9cpu which I know works as it boots
> barebox with the at91bootstrap BOOT.BIN
>
> - I have only a limited set of patches - pasted below.
>
> - Latest barebox from the master branch
>
> - I have tried to power cycle and reset of the board - no change
>
> - There is a ">RomBOOT" prompt - but nothing else
>
> Sam
By porting sama5d3 I noticed that bootROM is resetting configuration for
at least some of ip cores. So, the main question is, do everything needed
for uart is still pre-configured? For example pllc and clk settings?
I would recommend to measure with scope the uart lines and see if you
get something and if it is at expected frequency. JTAG would probably
help as well to see what code is currently executed and if register
configurations are in expected state.
As soon as UART is working, every thing else will be not really hard to
do :)
> diff --git a/arch/arm/boards/skov-arm9cpu/lowlevel.c b/arch/arm/boards/skov-arm9cpu/lowlevel.c
> index d335953a7..8d5c0b025 100644
> --- a/arch/arm/boards/skov-arm9cpu/lowlevel.c
> +++ b/arch/arm/boards/skov-arm9cpu/lowlevel.c
> @@ -3,14 +3,20 @@
>
> #include <linux/sizes.h>
>
> +#include <debug_ll.h>
> +
> #include <asm/barebox-arm.h>
>
> #include <mach/at91sam926x_board_init.h>
> #include <mach/at91sam9263_matrix.h>
> +#include <mach/at91_dbgu.h>
> +#include <mach/iomux.h>
>
> #define MASTER_PLL_MUL 171
> #define MASTER_PLL_DIV 14
>
> +#define MASTER_CLOCK (200000000/2)
> +
> static void __bare_init skovarm9cpu_board_config(struct at91sam926x_board_cfg *cfg)
> {
> /* Disable Watchdog */
> @@ -96,6 +102,18 @@ static void __bare_init skovarm9cpu_board_config(struct at91sam926x_board_cfg *c
> AT91_RSTC_RSTTYP_WATCHDOG;
> }
>
> +static void dbgu_init(void)
> +{
> + void __iomem *pio = IOMEM(AT91SAM9263_BASE_PIOC);
> + // Setup DBGU uart
> + at91_mux_pio3_pin(pio, pin_to_mask(AT91_PIN_PC30), AT91_MUX_PERIPH_A, GPIO_PULL_UP); // DRXD
> + at91_mux_pio3_pin(pio, pin_to_mask(AT91_PIN_PC31), AT91_MUX_PERIPH_A, 0); // DTXD
> +
> + at91_dbgu_setup_ll(IOMEM(AT91_BASE_DBGU1), MASTER_CLOCK, 115200);
> + pbl_set_putc(at91_dbgu_putc, IOMEM(AT91_BASE_DBGU1));
> + putc_ll('#');
> +}
> +
> static void __bare_init skov_arm9cpu_init(void *fdt)
> {
> struct at91sam926x_board_cfg cfg;
> @@ -108,6 +126,8 @@ static void __bare_init skov_arm9cpu_init(void *fdt)
> skovarm9cpu_board_config(&cfg);
> at91sam9263_board_init(&cfg);
>
> + dbgu_init();
> +
> barebox_arm_entry(AT91_CHIPSELECT_1, at91_get_sdram_size(cfg.sdramc),
> fdt);
> }
>
> #
> # Automatically generated file; DO NOT EDIT.
> # Barebox/arm 2021.12.0 Configuration
> #
> CONFIG_ARM=y
> CONFIG_HAVE_MACH_ARM_HEAD=y
> CONFIG_ARM_USE_COMPRESSED_DTB=y
> CONFIG_TEXT_BASE=0x0
>
> #
> # System Type
> #
> CONFIG_ARCH_AT91=y
> # CONFIG_ARCH_BCM283X is not set
> # CONFIG_ARCH_CLPS711X is not set
> # CONFIG_ARCH_DAVINCI is not set
> # CONFIG_ARCH_DIGIC is not set
> # CONFIG_ARCH_EP93XX is not set
> # CONFIG_ARCH_IMX is not set
> # CONFIG_ARCH_LAYERSCAPE is not set
> # CONFIG_ARCH_MVEBU is not set
> # CONFIG_ARCH_MXS is not set
> # CONFIG_ARCH_NOMADIK is not set
> # CONFIG_ARCH_OMAP is not set
> # CONFIG_ARCH_PXA is not set
> # CONFIG_ARCH_ROCKCHIP is not set
> # CONFIG_ARCH_SOCFPGA is not set
> # CONFIG_ARCH_S3C24xx is not set
> # CONFIG_ARCH_S5PCxx is not set
> # CONFIG_ARCH_S3C64xx is not set
> # CONFIG_ARCH_STM32MP is not set
> # CONFIG_ARCH_VERSATILE is not set
> # CONFIG_ARCH_VEXPRESS is not set
> # CONFIG_ARCH_TEGRA is not set
> # CONFIG_ARCH_UEMD is not set
> # CONFIG_ARCH_ZYNQ is not set
> # CONFIG_ARCH_ZYNQMP is not set
> # CONFIG_ARCH_ARM64_VIRT is not set
>
> #
> # Processor Type
> #
> CONFIG_CPU_32=y
> CONFIG_CPU_ARM926T=y
> CONFIG_CPU_32v5=y
>
> #
> # processor features
> #
> # CONFIG_BOOT_ENDIANNESS_SWITCH is not set
> CONFIG_HAVE_AT91_UTMI=y
> CONFIG_HAVE_AT91_USB_CLK=y
> CONFIG_COMMON_CLK_AT91=y
> CONFIG_HAVE_AT91_SMD=y
> CONFIG_HAVE_AT91_BOOTSTRAP=y
> CONFIG_AT91SAM926X_BOARD_INIT=y
> CONFIG_AT91SAM9_SMC=y
> CONFIG_HAVE_AT91SAM9_RST=y
> CONFIG_SOC_AT91SAM9=y
> CONFIG_ARCH_TEXT_BASE=0x23f00000
> CONFIG_HAVE_AT91_LOAD_BAREBOX_SRAM=y
>
> #
> # Atmel AT91 System-on-Chip
> #
> CONFIG_SOC_AT91SAM9263=y
> CONFIG_AT91_MULTI_BOARDS=y
> CONFIG_MACH_SKOV_ARM9CPU=y
> # CONFIG_MACH_AT91SAM9263EK is not set
> # CONFIG_MACH_AT91SAM9X5EK is not set
> # CONFIG_MACH_MICROCHIP_KSZ9477_EVB is not set
> # CONFIG_MACH_SAMA5D3_XPLAINED is not set
> # CONFIG_MACH_SAMA5D27_SOM1 is not set
> # CONFIG_MACH_SAMA5D27_GIANTBOARD is not set
>
> #
> # AT91 Board Options
> #
> CONFIG_AT91_BOOTSTRAP=y
> # CONFIG_AT91_LOAD_BAREBOX_SRAM is not set
> CONFIG_BAREBOX_MAX_IMAGE_SIZE=0x40000
> # CONFIG_BOARD_ARM_GENERIC_DT is not set
> # CONFIG_AEABI is not set
> # end of System Type
>
> #
> # ARM specific settings
> #
> # CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS is not set
> CONFIG_ARM_EXCEPTIONS=y
> # CONFIG_ARM_SEMIHOSTING is not set
> # end of ARM specific settings
>
> CONFIG_GREGORIAN_CALENDER=y
> CONFIG_HAS_KALLSYMS=y
> CONFIG_HAS_MODULES=y
> CONFIG_HAS_CACHE=y
> CONFIG_HAS_DMA=y
> CONFIG_HAS_ARCH_SJLJ=y
> CONFIG_GENERIC_GPIO=y
> CONFIG_BLOCK=y
> CONFIG_BLOCK_WRITE=y
> CONFIG_USE_COMPRESSED_DTB=y
> CONFIG_FILETYPE=y
>
> #
> # General Settings
> #
> CONFIG_LOCALVERSION=""
> CONFIG_LOCALVERSION_AUTO=y
> CONFIG_BANNER=y
> CONFIG_MEMINFO=y
> # CONFIG_ENVIRONMENT_VARIABLES is not set
> # CONFIG_GLOBALVAR is not set
>
> #
> # memory layout
> #
> CONFIG_HAVE_PBL_IMAGE=y
> CONFIG_HAVE_PBL_MULTI_IMAGES=y
> CONFIG_HAVE_IMAGE_COMPRESSION=y
> CONFIG_PBL_IMAGE=y
> CONFIG_PBL_MULTI_IMAGES=y
> CONFIG_PBL_RELOCATABLE=y
> CONFIG_IMAGE_COMPRESSION=y
> # CONFIG_IMAGE_COMPRESSION_LZ4 is not set
> CONFIG_IMAGE_COMPRESSION_LZO=y
> # CONFIG_IMAGE_COMPRESSION_GZIP is not set
> # CONFIG_IMAGE_COMPRESSION_XZKERN is not set
> # CONFIG_IMAGE_COMPRESSION_NONE is not set
> # CONFIG_MMU is not set
> CONFIG_BAREBOX_MAX_PBL_SIZE=0xffffffff
> CONFIG_BAREBOX_MAX_BARE_INIT_SIZE=0xffffffff
> CONFIG_STACK_SIZE=0x8000
> CONFIG_MALLOC_SIZE=0x400000
> # end of memory layout
>
> # CONFIG_EXPERIMENTAL is not set
> # CONFIG_MALLOC_DLMALLOC is not set
> CONFIG_MALLOC_TLSF=y
> # CONFIG_MALLOC_DUMMY is not set
> CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
> # CONFIG_KALLSYMS is not set
> CONFIG_RELOCATABLE=y
> # CONFIG_PANIC_HANG is not set
> CONFIG_PROMPT="barebox:"
> CONFIG_BAUDRATE=115200
> CONFIG_SIMPLE_READLINE=y
> CONFIG_CBSIZE=1024
> # CONFIG_SHELL_HUSH is not set
> # CONFIG_SHELL_SIMPLE is not set
> CONFIG_SHELL_NONE=y
> # CONFIG_GLOB is not set
> # CONFIG_PASSWORD is not set
> CONFIG_ERRNO_MESSAGES=y
> CONFIG_TIMESTAMP=y
> # CONFIG_BOOTM is not set
> # CONFIG_BAREBOX_UPDATE is not set
> # CONFIG_IMD is not set
> # CONFIG_CONSOLE_FULL is not set
> CONFIG_CONSOLE_SIMPLE=y
> # CONFIG_CONSOLE_NONE is not set
> # CONFIG_CONSOLE_ALLOW_COLOR is not set
> # CONFIG_CONSOLE_DISABLE_INPUT is not set
> CONFIG_PBL_CONSOLE=y
> CONFIG_PARTITION=y
> CONFIG_PARTITION_DISK=y
> CONFIG_PARTITION_DISK_DOS=y
> # CONFIG_PARTITION_DISK_EFI is not set
> # CONFIG_ENV_HANDLING is not set
> # CONFIG_DEFAULT_ENVIRONMENT is not set
> # CONFIG_DEFAULT_COMPRESSION_GZIP is not set
> # CONFIG_DEFAULT_COMPRESSION_LZO is not set
> CONFIG_DEFAULT_COMPRESSION_NONE=y
> CONFIG_HAS_SCHED=y
> CONFIG_POLLER=y
> # CONFIG_BTHREAD is not set
> # CONFIG_STATE is not set
> # CONFIG_BOOTCHOOSER is not set
> CONFIG_EXTERNAL_DTS_FRAGMENTS=""
>
> #
> # OP-TEE loading
> #
> # CONFIG_PBL_OPTEE is not set
> # end of OP-TEE loading
> # end of General Settings
>
> #
> # Debugging
> #
> CONFIG_COMPILE_LOGLEVEL=6
> CONFIG_DEFAULT_LOGLEVEL=7
> CONFIG_DEBUG_LL=y
> CONFIG_DEBUG_AT91_UART=y
> CONFIG_DEBUG_AT91_UART_BASE=0xffffee00
> # CONFIG_DEBUG_INITCALLS is not set
> # CONFIG_DEBUG_PROBES is not set
> # CONFIG_PBL_BREAK is not set
> # CONFIG_PRINTF_FULL is not set
> # CONFIG_UBSAN is not set
> CONFIG_HAVE_ARCH_KASAN=y
> CONFIG_CC_HAS_KASAN_GENERIC=y
> # CONFIG_KASAN is not set
> # CONFIG_COMPILE_TEST is not set
> # end of Debugging
>
> #
> # EFI (Extensible Firmware Interface) Support
> #
> # end of EFI (Extensible Firmware Interface) Support
>
> CONFIG_HAS_DEBUG_LL=y
> # CONFIG_NET is not set
>
> #
> # Drivers
> #
> CONFIG_OFTREE=y
> CONFIG_OFTREE_MEM_GENERIC=y
> CONFIG_DTC=y
> CONFIG_OFDEVICE=y
> CONFIG_OF_GPIO=y
> # CONFIG_OF_OVERLAY is not set
> # CONFIG_AIODEV is not set
>
> #
> # serial drivers
> #
> # CONFIG_DRIVER_SERIAL_ARM_DCC is not set
> # CONFIG_DRIVER_SERIAL_NS16550 is not set
> CONFIG_DRIVER_SERIAL_ATMEL=y
> # CONFIG_DRIVER_SERIAL_CADENCE is not set
> # CONFIG_SERIAL_SIFIVE is not set
> # end of serial drivers
>
> CONFIG_HAS_MACB=y
>
> #
> # SPI drivers
> #
> # CONFIG_SPI is not set
> # end of SPI drivers
>
> # CONFIG_I2C is not set
> # CONFIG_MTD is not set
> CONFIG_DISK=y
> CONFIG_DISK_WRITE=y
>
> #
> # drive types
> #
> # CONFIG_DISK_ATA is not set
> # CONFIG_DISK_AHCI is not set
>
> #
> # interface types
> #
> # CONFIG_DISK_INTF_PLATFORM_IDE is not set
> # CONFIG_USB_HOST is not set
> # CONFIG_USB_GADGET is not set
> # CONFIG_USB_MUSB is not set
> CONFIG_VIDEO=y
> # CONFIG_FRAMEBUFFER_CONSOLE is not set
> CONFIG_DRIVER_VIDEO_ATMEL=y
> # CONFIG_DRIVER_VIDEO_ATMEL_HLCD is not set
> # CONFIG_DRIVER_VIDEO_BOCHS_ISA is not set
> # CONFIG_DRIVER_VIDEO_SIMPLEFB_CLIENT is not set
> # CONFIG_DRIVER_VIDEO_SIMPLEFB is not set
> # CONFIG_DRIVER_VIDEO_EDID is not set
> CONFIG_DRIVER_VIDEO_BACKLIGHT=y
>
> #
> # Video encoder chips
> #
> # CONFIG_DRIVER_VIDEO_SIMPLE_PANEL is not set
> # CONFIG_SOUND is not set
> CONFIG_MCI=y
>
> #
> # --- Feature list ---
> #
> # CONFIG_MCI_STARTUP is not set
> CONFIG_MCI_WRITE=y
> CONFIG_MCI_MMC_BOOT_PARTITIONS=y
> # CONFIG_MCI_MMC_GPP_PARTITIONS is not set
>
> #
> # --- MCI host drivers ---
> #
> # CONFIG_MCI_DW is not set
> # CONFIG_MCI_ROCKCHIP_DWCMSHC is not set
> CONFIG_MCI_ATMEL=y
> # CONFIG_MCI_ATMEL_SDHCI is not set
> # CONFIG_MCI_ARASAN is not set
> CONFIG_HAVE_CLK=y
> CONFIG_CLKDEV_LOOKUP=y
> CONFIG_COMMON_CLK=y
> CONFIG_COMMON_CLK_OF_PROVIDER=y
>
> #
> # Clocksource
> #
> CONFIG_CLOCKSOURCE_DUMMY_RATE=1000
> CONFIG_CLOCKSOURCE_ATMEL_PIT=y
> # CONFIG_CLOCKSOURCE_DW_APB_TIMER is not set
> # end of Clocksource
>
> #
> # Multifunction device drivers
> #
> CONFIG_MFD_SYSCON=y
> # CONFIG_MFD_ATMEL_FLEXCOM is not set
> # end of Multifunction device drivers
>
> #
> # Misc devices
> #
> # CONFIG_JTAG is not set
> CONFIG_SRAM=y
> # CONFIG_DEV_MEM is not set
> # CONFIG_UBOOTVAR is not set
> # end of Misc devices
>
> CONFIG_LED=y
> CONFIG_LED_GPIO=y
> CONFIG_LED_GPIO_OF=y
> # CONFIG_LED_GPIO_RGB is not set
> # CONFIG_LED_GPIO_BICOLOR is not set
> CONFIG_LED_TRIGGERS=y
>
> #
> # EEPROM support
> #
> # end of EEPROM support
>
> #
> # Input device support
> #
> CONFIG_INPUT=y
> CONFIG_KEYBOARD_GPIO=y
> # CONFIG_INPUT_SPECIALKEYS is not set
> # end of Input device support
>
> # CONFIG_WATCHDOG is not set
> # CONFIG_PWM is not set
> # CONFIG_HWRNG is not set
>
> #
> # DMA support
> #
> # end of DMA support
>
> CONFIG_GPIOLIB=y
>
> #
> # GPIO
> #
> # CONFIG_GPIO_74XX_MMIO is not set
> # CONFIG_GPIO_GENERIC_PLATFORM is not set
> # CONFIG_GPIO_DESIGNWARE is not set
> # CONFIG_GPIO_SIFIVE is not set
> # end of GPIO
>
> # CONFIG_W1 is not set
>
> #
> # Pin controllers
> #
> CONFIG_PINCTRL=y
> CONFIG_PINCTRL_AT91=y
> # CONFIG_PINCTRL_AT91PIO4 is not set
> # CONFIG_PINCTRL_SINGLE is not set
> # end of Pin controllers
>
> # CONFIG_NVMEM is not set
>
> #
> # Bus devices
> #
> # end of Bus devices
>
> # CONFIG_REGULATOR is not set
>
> #
> # Remoteproc drivers
> #
> # CONFIG_REMOTEPROC is not set
> # end of Remoteproc drivers
>
> # CONFIG_RESET_CONTROLLER is not set
> # CONFIG_RTC_CLASS is not set
>
> #
> # Firmware Drivers
> #
> # end of Firmware Drivers
>
> #
> # FPGA Configuration Support
> #
> # CONFIG_FPGA is not set
> # end of FPGA Configuration Support
>
> # CONFIG_GENERIC_PHY is not set
> # CONFIG_CRYPTO_HW is not set
>
> #
> # Memory controller drivers
> #
> # end of Memory controller drivers
>
> #
> # i.MX SoC drivers
> #
> # end of i.MX SoC drivers
>
> #
> # NVME Support
> #
> # end of NVME Support
>
> # CONFIG_SYSCON_REBOOT_MODE is not set
> # CONFIG_POWER_RESET_SYSCON is not set
> # CONFIG_POWER_RESET_SYSCON_POWEROFF is not set
> # CONFIG_POWER_RESET_GPIO is not set
> # CONFIG_POWER_RESET_GPIO_RESTART is not set
> # CONFIG_VIRTIO_MENU is not set
> # end of Drivers
>
> #
> # Filesystem support
> #
> CONFIG_FS=y
> CONFIG_FS_LEGACY=y
>
> #
> # Some selected filesystems still use the legacy FS API.
> #
>
> #
> # Consider updating them.
> #
> # CONFIG_FS_CRAMFS is not set
> # CONFIG_FS_EXT4 is not set
> # CONFIG_FS_RAMFS is not set
> # CONFIG_FS_DEVFS is not set
> CONFIG_FS_FAT=y
> CONFIG_FS_FAT_WRITE=y
> CONFIG_FS_FAT_LFN=y
> # CONFIG_FS_BPKFS is not set
> # CONFIG_FS_UIMAGEFS is not set
> # CONFIG_FS_PSTORE is not set
> # CONFIG_FS_SQUASHFS is not set
>
> #
> # ZLIB support disabled
> #
>
> #
> # LZ4 support disabled
> #
>
> #
> # LZO support disabled
> #
>
> #
> # XZ support disabled
> #
>
> #
> # ZSTD support disabled
> #
> # end of Filesystem support
>
> #
> # Library routines
> #
> CONFIG_UNCOMPRESS=y
> CONFIG_ZLIB=y
> # CONFIG_BZLIB is not set
> # CONFIG_LZ4_DECOMPRESS is not set
> # CONFIG_ZSTD_DECOMPRESS is not set
> # CONFIG_XZ_DECOMPRESS is not set
> # CONFIG_BASE64 is not set
> CONFIG_LZO_DECOMPRESS=y
> # CONFIG_ALLOW_PRNG_FALLBACK is not set
> # CONFIG_CRC_CCITT is not set
> # CONFIG_CRC8 is not set
>
> #
> # Library gui routines
> #
> # end of Library gui routines
>
> # CONFIG_BAREBOX_LOGO is not set
> CONFIG_BOOTSTRAP=y
> CONFIG_BOOTSTRAP_DEVFS=y
> CONFIG_BOOTSTRAP_DISK=y
> # CONFIG_NLS is not set
> # CONFIG_BLOBGEN is not set
> CONFIG_ARCH_HAS_DATA_ABORT_MASK=y
> # end of Library routines
>
> #
> # Crypto support
> #
> # CONFIG_DIGEST is not set
> # CONFIG_CRYPTO_KEYSTORE is not set
> # end of Crypto support
>
> #
> # Firmware files
> #
> CONFIG_EXTRA_FIRMWARE_DIR="firmware"
> # end of Firmware files
>
> #
> # Host Tools
> #
> # CONFIG_COMPILE_HOST_TOOLS is not set
> # end of Host Tools
>
> #
> # Target Tools
> #
> # CONFIG_KERNEL_INSTALL_TARGET is not set
> # CONFIG_BAREBOXENV_TARGET is not set
> # CONFIG_BAREBOXCRC32_TARGET is not set
> # CONFIG_MVEBU_KWBOOT_TARGET is not set
> # end of Target Tools
>
> # CONFIG_TEST is not set
>
> _______________________________________________
> barebox mailing list
> barebox@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/barebox
>
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