January 2022 - U-Boot

[PATCH v2] smbios: Fix table when no string is present
by matthias.bgg＠kernel.org 31 Jan '24

31 Jan '24

From: Matthias Brugger <mbrugger(a)suse.com> When no string is present in a table, next_ptr points to the same location as eos. When calculating the string table length, we would only reserve one \0. By spec a SMBIOS table has to end with two \0\0 when no strings a present. Signed-off-by: Matthias Brugger <mbrugger(a)suse.com> --- Changes in v2: - check in smbios_string_table_len if no string present and return value accordingly lib/smbios.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/smbios.c b/lib/smbios.c index 9eb226ec9f..fd57d8694f 100644 --- a/lib/smbios.c +++ b/lib/smbios.c @@ -191,6 +191,10 @@ int smbios_update_version(const char *version) */ static int smbios_string_table_len(const struct smbios_ctx *ctx) { + /* In case no string is defined we have to return two \0 */ + if (ctx->next_ptr == ctx->eos) + return 2; + /* Allow for the final \0 after all strings */ return (ctx->next_ptr + 1) - ctx->eos; } -- 2.30.2

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[PATCH v1] qemu-arm: round down memory to multiple of 2MB
by Igor Opaniuk 31 Jan '24

31 Jan '24

From: Igor Opaniuk <igor.opaniuk(a)foundries.io> When LPAE is enabled, 1:1 mapping is created using 2 MB blocks. In case amount of memory provided to QEMU is not multiple of 2 MB, round down the amount of available memory to avoid hang during MMU initialization. How to reproduce: qemu-system-arm -machine virt -m 1058 -nographic -bios u-boot.bin - boots qemu-system-arm -machine virt -m 1057 -nographic -bios u-boot.bin - hangs DRAM: 1 GiB initcall: 60011df8 initcall: 60011904 New Stack Pointer is: 80fffe90 initcall: 60011a20 initcall: 60011bcc initcall: 60011bd4 initcall: 600119b4 Relocation Offset is: 22042000 Relocating to 82042000, new gd at 81001ed0, sp at 80fffe90 initcall: 60011b8c initcall: 82053ea0 initcall: 82053ea8 initcall: 60012040 (relocated to 82054040) dram_bank_mmu_setup: bank: 0 --- hang here during mmu init --- Fixes: 3fa914af82("arm: qemu: implement enable_caches()") Signed-off-by: Igor Opaniuk <igor.opaniuk(a)foundries.io> --- board/emulation/qemu-arm/qemu-arm.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/board/emulation/qemu-arm/qemu-arm.c b/board/emulation/qemu-arm/qemu-arm.c index aa68bef469..841dd7af0e 100644 --- a/board/emulation/qemu-arm/qemu-arm.c +++ b/board/emulation/qemu-arm/qemu-arm.c @@ -84,6 +84,18 @@ int dram_init(void) if (fdtdec_setup_mem_size_base() != 0) return -EINVAL; + /* + * When LPAE is enabled (ARMv7), + * 1:1 mapping is created using 2 MB blocks. + * + * In case amount of memory provided to QEMU + * is not multiple of 2 MB, round down the amount + * of available memory to avoid hang during MMU + * initialization. + */ + if (CONFIG_IS_ENABLED(ARMV7_LPAE)) + gd->ram_size -= (gd->ram_size % 0x200000); + return 0; } -- 2.25.1

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[PATCH v1 1/1] Makefile.lib: Always rebuild DSDT
by Andy Shevchenko 09 Dec '23

09 Dec '23

The dsdt.asl is usually combined out of several files that are included in the main one. Whenever we change the content of any of such files, build system is not able to recognize them. Hence the easiest way is to force DSDT rebuild each time we run make. Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> --- scripts/Makefile.lib | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 07696e86bb54..8c3c893b398a 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -441,7 +441,7 @@ cmd_acpi_c_asl= \ iasl -p $@ -tc $(ASL_TMP) $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \ mv $(patsubst %.c,%.hex,$@) $@ -$(obj)/dsdt.c: $(src)/dsdt.asl +$(obj)/dsdt.c: $(src)/dsdt.asl FORCE $(call cmd,acpi_c_asl) $(Q)sed -i -e "s,dsdt_aml_code,AmlCode," $@ -- 2.33.0

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[BUG] efi_loader: incorrect creation of device paths
by Heinrich Schuchardt 19 Jul '23

19 Jul '23

Hello Takahiro, in a prior mail we have discussed the creation of device paths for USB mass storage devices. On the sand boxyou get the following devices after 'usb start': Class Index Probed Driver Name ----------------------------------------------------------- usb 0 [ + ] usb_sandbox |-- usb@1 usb_hub 0 [ + ] usb_hub | `-- hub usb_mass_s 0 [ + ] usb_mass_storage | |-- usb_mass_storage blk 3 [ ] usb_storage_blk | | `-- usb_mass_storage.lun0 usb_mass_s 1 [ + ] usb_mass_storage | |-- usb_mass_storage blk 4 [ ] usb_storage_blk | | `-- usb_mass_storage.lun0 usb_mass_s 2 [ + ] usb_mass_storage | `-- usb_mass_storage blk 5 [ ] usb_storage_blk | `-- usb_mass_storage.lun0 For of these storage devices we try to create the same device path which is not allowable: => usb start starting USB... Bus usb@1: scanning bus usb@1 for devices... 5 USB Device(s) found scanning usb for storage devices... 3 Storage Device(s) found => => efidebug dh Scanning disk mmc2.blk... handle 0000000015e34f00, /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/SD(2)/SD(0) Scanning disk mmc1.blk... handle 0000000015e36b30, /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/SD(1)/SD(1) Scanning disk mmc0.blk... handle 0000000015e35b00, /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/SD(0)/SD(2) Scanning disk usb_mass_storage.lun0... handle 0000000015e35c10, /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/UsbClass(0x1234,0x5678,0x9,0x0,0x0)/UsbClass(0x1234,0x5678,0x0,0x0,0x0) fs_devread read outside partition 2 Failed to mount ext2 filesystem... BTRFS: superblock end 69632 is larger than device size 512 Scanning disk usb_mass_storage.lun0... handle 0000000015e361f0, /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/UsbClass(0x1234,0x5678,0x9,0x0,0x0)/UsbClass(0x1234,0x5678,0x0,0x0,0x0) ERROR: failure to add disk device usb_mass_storage.lun0, r = 20 Error: Cannot initialize UEFI sub-system, r = 20 I will provide a patch that will allow the first USB device to be used and avoids stopping the boot process. But we really have to walk the dm tree to create a device patch for USB devices based on port IDs. We should add a new field to struct uclass_driver: struct efi_device_path *get_node(udevice *dev); This function shall return a pointer to an freshly allocated buffer with the device node for the device. To build the devicepath we can then walk the dm tree. To make migration easier: If the function pointer or the return value is NULL we can create a CTRL() node as dummy using the uclass_id and the device number. Best regards Heinrich

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[PATCH] usb: eth: lan78xx: Fix logic in lan78xx_read_otp() to avoid a warning
by Tom Rini 20 Jun '23

20 Jun '23

In lan78xx_read_otp() we want to know if sig is LAN78XX_OTP_INDICATOR_1 or LAN78XX_OTP_INDICATOR_2. In the case of matching the first one we set offset to itself, and clang warns about this. Rework the logic so that if sig is the second indicator we adjust the offset as today and if it does not match the first indicator we return -EINVAL Cc: Marek Vasut <marex(a)denx.de> Signed-off-by: Tom Rini <trini(a)konsulko.com> --- drivers/usb/eth/lan78xx.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/usb/eth/lan78xx.c b/drivers/usb/eth/lan78xx.c index e34ad2603fbb..d147412990de 100644 --- a/drivers/usb/eth/lan78xx.c +++ b/drivers/usb/eth/lan78xx.c @@ -146,11 +146,9 @@ static int lan78xx_read_otp(struct usb_device *udev, u32 offset, ret = lan78xx_read_raw_otp(udev, 0, 1, &sig); if (!ret) { - if (sig == LAN78XX_OTP_INDICATOR_1) - offset = offset; - else if (sig == LAN78XX_OTP_INDICATOR_2) + if (sig == LAN78XX_OTP_INDICATOR_2) offset += 0x100; - else + else if (sig != LAN78XX_OTP_INDICATOR_1) return -EINVAL; ret = lan78xx_read_raw_otp(udev, offset, length, data); if (ret) -- 2.17.1

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kwboot: Marvell Dove UART booting
by Tony Dinh 20 Mar '23

20 Mar '23

Hi all, With great help from Pali, I've made some good progress on kwboot the HP Thin Client T5335z (Marvell Dove SoC) board. I had been unsuccessful running kwboot with this box until Pali pointed out a few important aspects of the Dove SoC, and how the BootROM commands work (my apology for forgetting to include the u-boot-mailing list and Marek on previous email exchanges). Here is the summary of the attempt to kwboot. HP Thin Client T5335z Marvell Dove SoC 88AP510 (A1) 1Ghz CPU 1 GB RAM - Reset Strapping: As with all Dove SoCs, there is no preamble when we send the u-boot image over the serial line. IOW, no magic handshake string to tell the BootROM that we are booting over UART. Instead, the hardware must explicitly set to UART mode booting. For boards like the Solidrun Cubox, there is a button, and some other board, a DIP switch, to enable this mode. For the T55335z, there is no button or DIP switch on the board for that purpose. Instead, there is a jumper (the exact purpose is unknown), but I found that this jumper will put the BootROM into debug mode. And from the BootROM debug prompt, we can execute a command to set the boot mode to UART with "x command. Here is the log and my commentary starting with *** <Begin log> *** With jumper inserted, serial console connected, start serial console # picocom --b 115200 --f n --p n --d 8 /dev/ttyUSB0 Terminal ready *** Hit <Enter> here to get to the prompt and execute "x 0x0E" Bootstrap 2.33> Bootstrap 2.33>x 0x0E *** No more input possible here, so Control-A-X to exit serial console Terminating... Thanks for using picocom *** Run kwboot # kwboot -t -p -B 115200 /dev/ttyUSB0 -D /localdisk/mtd0.t5335z Patching image boot signature to UART Aligning image header to Xmodem block size Waiting 2s and flushing tty Sending boot image header (512 bytes)... 25 % [.... ] Done Sending boot image data (607664 bytes)... 0 % [......................................................................] 1 % [......................................................................] 2 % [......................................................................] <snip> 95 % [......................................................................] 97 % [......................................................................] 98 % [.......................................................... ] Done Finishing transfer [Type Ctrl-\ + c to quit] *** Hung here! BootROM did not execute the image payload. *** *** The file mtd0.t5335z is a dd dump from the SPI flash mtd0 with *** this command: *** # dd if=/dev/mtd0 of=mtd0.t5335z bs=768k conv=sync <End log> - Pali's observation: It looks like Dove uses kwbimage v0 format with extensions, at least according to Function Spec. See 'Binary Code Extension' and 'Header Extension'. Currently kwboot and kwbimage supports v0 image only with one extension. - My comments in response: Indeed. I've seen that in the Functional Spec, too. The mdt0 binwalk also shows what looks like the extension header. DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 118161 0x1CD91 Certificate in DER format (x509 v3), header length: 4, sequence length: 3 199169 0x30A01 Certificate in DER format (x509 v3), header length: 4, sequence length: 5464 380652 0x5CEEC CRC32 polynomial table, little endian 387072 0x5E800 CRC32 polynomial table, little endian 608166 0x947A6 LZMA compressed data, properties: 0x66, dictionary size: 0 bytes, uncompressed size: 147351982848 bytes Thanks, Tony

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[PATCH 00/17] patman: Convert camel case
by Simon Glass 01 Mar '23

01 Mar '23

Much of the Python code in U-Boot was written using the Chromium OS Python style. This series converts the patman class methods and functions from camel case to snake case. This fits with PEP8 and is one step along the way to making the code more compliant with that. Simon Glass (17): patman: Convert camel case in tools.py patman: Convert camel case in command.py patman: Convert camel case in checkpatch.py patman: Convert camel case in commit.py patman: Convert camel case in cros_subprocess.py patman: Convert camel case in func_test.py patman: Convert camel case in get_maintainer.py patman: Convert camel case in gitutil.py patman: Convert camel case in project.py patman: Convert camel case in test_checkpatch.py patman: Convert camel case in test_util.py patman: Convert camel case in tout.py patman: Rename Print() to Tprint() patman: Rename Color() method to build() patman: Convert camel case in terminal.py patman: Update with new pylint scores RFC: tools: Add a camel-case conversion script scripts/pylint.base | 26 +- scripts/style.py | 180 +++++++++++ tools/binman/bintool.py | 30 +- tools/binman/bintool_test.py | 34 +- tools/binman/btool/lz4.py | 8 +- tools/binman/btool/lzma_alone.py | 16 +- tools/binman/cbfs_util.py | 12 +- tools/binman/cbfs_util_test.py | 20 +- tools/binman/control.py | 74 ++--- tools/binman/elf.py | 20 +- tools/binman/elf_test.py | 20 +- tools/binman/entry.py | 42 +-- tools/binman/entry_test.py | 4 +- tools/binman/etype/atf_fip.py | 2 +- tools/binman/etype/blob.py | 4 +- tools/binman/etype/blob_ext_list.py | 2 +- tools/binman/etype/fdtmap.py | 2 +- tools/binman/etype/files.py | 2 +- tools/binman/etype/fill.py | 2 +- tools/binman/etype/fit.py | 20 +- tools/binman/etype/fmap.py | 6 +- tools/binman/etype/gbb.py | 10 +- tools/binman/etype/intel_ifwi.py | 12 +- tools/binman/etype/mkimage.py | 8 +- tools/binman/etype/section.py | 26 +- tools/binman/etype/text.py | 4 +- tools/binman/etype/u_boot_elf.py | 6 +- tools/binman/etype/u_boot_env.py | 4 +- tools/binman/etype/u_boot_spl_bss_pad.py | 4 +- tools/binman/etype/u_boot_spl_expanded.py | 2 +- tools/binman/etype/u_boot_tpl_bss_pad.py | 4 +- tools/binman/etype/u_boot_tpl_expanded.py | 2 +- tools/binman/etype/u_boot_ucode.py | 4 +- tools/binman/etype/u_boot_with_ucode_ptr.py | 2 +- tools/binman/etype/vblock.py | 10 +- tools/binman/fdt_test.py | 4 +- tools/binman/fip_util.py | 16 +- tools/binman/fip_util_test.py | 36 +-- tools/binman/fmap_util.py | 2 +- tools/binman/ftest.py | 324 ++++++++++---------- tools/binman/image.py | 16 +- tools/binman/main.py | 6 +- tools/binman/state.py | 34 +- tools/buildman/builder.py | 108 +++---- tools/buildman/builderthread.py | 12 +- tools/buildman/control.py | 46 +-- tools/buildman/func_test.py | 20 +- tools/buildman/test.py | 30 +- tools/buildman/toolchain.py | 26 +- tools/dtoc/fdt.py | 4 +- tools/dtoc/fdt_util.py | 12 +- tools/dtoc/main.py | 6 +- tools/dtoc/test_dtoc.py | 76 ++--- tools/dtoc/test_fdt.py | 34 +- tools/dtoc/test_src_scan.py | 12 +- tools/patman/checkpatch.py | 36 +-- tools/patman/command.py | 30 +- tools/patman/commit.py | 10 +- tools/patman/control.py | 20 +- tools/patman/cros_subprocess.py | 59 ++-- tools/patman/func_test.py | 74 ++--- tools/patman/get_maintainer.py | 8 +- tools/patman/gitutil.py | 176 +++++------ tools/patman/main.py | 8 +- tools/patman/patchstream.py | 12 +- tools/patman/project.py | 4 +- tools/patman/series.py | 32 +- tools/patman/settings.py | 4 +- tools/patman/status.py | 22 +- tools/patman/terminal.py | 56 ++-- tools/patman/test_checkpatch.py | 80 ++--- tools/patman/test_util.py | 8 +- tools/patman/tools.py | 86 +++--- tools/patman/tout.py | 58 ++-- tools/rmboard.py | 16 +- 75 files changed, 1214 insertions(+), 1033 deletions(-) create mode 100755 scripts/style.py -- 2.35.0.rc2.247.g8bbb082509-goog

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[PATCH v2] riscv: cancel the limitation that NR_CPUS is less than or equal to 32
by Xiang W 13 Feb '23

13 Feb '23

Various specifications of riscv allow the number of hart to be greater than 32. The limit of 32 is determined by gd->arch.available_harts. We can eliminate this limitation through bitmaps. Currently, the number of hart is limited to 4095, and 4095 is the limit of the RISC-V Advanced Core Local Interruptor Specification. Test on sifive unmatched. Signed-off-by: Xiang W <wxjstz(a)126.com> --- Changes since v1: * When NR_CPUS is very large, the value of GD_AVAILABLE_HARTS will overflow the immediate range of ld/lw. This patch fixes this problem arch/riscv/Kconfig | 4 ++-- arch/riscv/cpu/start.S | 21 ++++++++++++++++----- arch/riscv/include/asm/global_data.h | 4 +++- arch/riscv/lib/smp.c | 2 +- 4 files changed, 22 insertions(+), 9 deletions(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index ba29e70acf..7b9c7f5bca 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -220,8 +220,8 @@ config SPL_SMP all, single processor machines. config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 + int "Maximum number of CPUs (2-4095)" + range 2 4095 depends on SMP || SPL_SMP default 8 help diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S index 76850ec9be..92f3b78f29 100644 --- a/arch/riscv/cpu/start.S +++ b/arch/riscv/cpu/start.S @@ -166,11 +166,22 @@ wait_for_gd_init: mv gp, s0 /* register available harts in the available_harts mask */ - li t1, 1 - sll t1, t1, tp - LREG t2, GD_AVAILABLE_HARTS(gp) - or t2, t2, t1 - SREG t2, GD_AVAILABLE_HARTS(gp) + li t1, GD_AVAILABLE_HARTS + add t1, t1, gp + LREG t1, 0(t1) +#if defined(CONFIG_ARCH_RV64I) + srli t2, tp, 6 + slli t2, t2, 3 +#elif defined(CONFIG_ARCH_RV32I) + srli t2, tp, 5 + slli t2, t2, 2 +#endif + add t1, t1, t2 + LREG t2, 0(t1) + li t3, 1 + sll t3, t3, tp + or t2, t2, t3 + SREG t2, 0(t1) amoswap.w.rl zero, zero, 0(t0) diff --git a/arch/riscv/include/asm/global_data.h b/arch/riscv/include/asm/global_data.h index 095484a635..6de2ee0b25 100644 --- a/arch/riscv/include/asm/global_data.h +++ b/arch/riscv/include/asm/global_data.h @@ -10,9 +10,11 @@ #ifndef __ASM_GBL_DATA_H #define __ASM_GBL_DATA_H +#include <config.h> #include <asm/smp.h> #include <asm/u-boot.h> #include <compiler.h> +#include <linux/bitops.h> /* Architecture-specific global data */ struct arch_global_data { @@ -28,7 +30,7 @@ struct arch_global_data { struct ipi_data ipi[CONFIG_NR_CPUS]; #endif #ifndef CONFIG_XIP - ulong available_harts; + ulong available_harts[BITS_TO_LONGS(CONFIG_NR_CPUS)]; #endif }; diff --git a/arch/riscv/lib/smp.c b/arch/riscv/lib/smp.c index ba992100ad..e8e391fd41 100644 --- a/arch/riscv/lib/smp.c +++ b/arch/riscv/lib/smp.c @@ -47,7 +47,7 @@ static int send_ipi_many(struct ipi_data *ipi, int wait) #ifndef CONFIG_XIP /* skip if hart is not available */ - if (!(gd->arch.available_harts & (1 << reg))) + if (!test_bit(reg, gd->arch.available_harts)) continue; #endif -- 2.30.2

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[PATCH] RFC: nvedit: support doing one (extra) expansion of the value in "env set"
by Rasmus Villemoes 02 Feb '23

02 Feb '23

Currently, there's no way to fetch the value of an environment variable whose name is stored in some other variable, or generated from such - in non-working pseudo-code, ${${varname}} ${array${index}} This forces some scripts to needlessly duplicate logic and hardcode assumptions. For example, in an A/B scheme with three variables BOOT_ORDER # Either "A B" or "B A" depending on which slot was last updated BOOT_A_LEFT # 0..3 BOOT_B_LEFT # 0..3 when one needs to determine the slot to boot from, one does something like setenv found for slot in $BOOT_ORDER ; do if test "x$found" != "x" ; then # work around lack of break elif test "x$slot" = "xA" ; then if test $BOOT_A_LEFT -gt 0 ; then setexpr BOOT_A_LEFT $BOOT_A_LEFT - 1 setenv found A setenv bootargs ${bootargs_A} setenv ubivol ${ubivol_A} # more setup based on A fi elif test "x$slot" = "xB" ; then if test $BOOT_B_LEFT -gt 0 ; then # the same ... fi fi done This is already bad enough, but extending that to A/B/C is tedious and prone to copy-pastos. So this is an attempt at allowing one to do "env set -E var value1 value2" with the effect that, of course, normal variable expansion happens on the command line, the valueX are joined with spaces as usual, and then one more pass is done over that string replacing occurrences of ${foo}. The above would become setenv found for slot in $BOOT_ORDER ; do if test "x$found" != "x" ; then # work around lack of break else env set -E boot_left "\${BOOT_${slot}_LEFT}" if test $boot_left -gt 0 ; then setexpr BOOT_${slot}_LEFT $boot_left - 1 env set found $slot env set -E bootargs "\${bootargs_${slot}}" env set -E ubivol "\${ubivol_${slot}}" fi fi done I'm pleasantly surprised it was that easy to implement, but of course I'm cheating a bit (cli_simple_process_macros is only available if CONFIG_CMDLINE, though I think cli_simple.o could be unconditionally built and then link-time GC should get rid of the excess functions). This has been lightly tested in the sandbox. I'll add some proper unit tests, update the help texts and try to handle the Kconfig issue if this is something that might be accepted. Signed-off-by: Rasmus Villemoes <rasmus.villemoes(a)prevas.dk> --- cmd/nvedit.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/cmd/nvedit.c b/cmd/nvedit.c index 81d94cd193..ff6ffcb674 100644 --- a/cmd/nvedit.c +++ b/cmd/nvedit.c @@ -224,7 +224,7 @@ DONE: */ static int _do_env_set(int flag, int argc, char * const argv[], int env_flag) { - int i, len; + int i, len, expand = 0; char *name, *value, *s; struct env_entry e, *ep; @@ -244,6 +244,9 @@ static int _do_env_set(int flag, int argc, char * const argv[], int env_flag) case 'f': /* force */ env_flag |= H_FORCE; break; + case 'E': + expand = 1; + break; default: return CMD_RET_USAGE; } @@ -287,6 +290,18 @@ static int _do_env_set(int flag, int argc, char * const argv[], int env_flag) if (s != value) *--s = '\0'; + if (expand) { + char *expanded = malloc(CONFIG_SYS_CBSIZE); + + if (expanded == NULL) { + printf("## Can't malloc %d bytes\n", CONFIG_SYS_CBSIZE); + free(value); + return 1; + } + cli_simple_process_macros(value, expanded); + free(value); + value = expanded; + } e.key = name; e.data = value; hsearch_r(e, ENV_ENTER, &ep, &env_htab, env_flag); -- 2.23.0

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linksys wrt1900acs v2 boot problem
by Dilyan Lazarov 07 Jan '23

07 Jan '23

Hi, I have a problem with my linksys wrt1900acs. My main question is this a hardware problem or software problem? Is it possible to address? I have started researching and have tried with "kwboot" under Windows VM - Ubuntu 20 - Linux but I have a problem with usb serial connection. I have tried several things but I understand that it isn't possible to start USB to Serial on a Windows VM. I will expect your response. Thank you in advance. All the best Dilyan I see the following Log from U-Boot with PuTTy under Windows 10: BootROM - 1.73 Booting from NAND flash General initialization - Version: 1.0.0 Detected Device ID 6820 High speed PHY - Version: 2.0 Init RD NAS topology Serdes Lane 3 is USB3 Serdes Lane 4 is SGMII board SerDes lanes topology details: | Lane # | Speed | Type | -------------------------------- | 0 | 06 | SATA0 | | 1 | 05 | PCIe0 | | 2 | 06 | SATA1 | | 3 | 05 | USB3 HOST1 | | 4 | 05 | PCIe1 | | 5 | 00 | SGMII2 | -------------------------------- :** Link is Gen1, check the EP capability PCIe, Idx 0: Link upgraded to Gen2 based on client cpabilities :** Link is Gen1, check the EP capability PCIe, Idx 1: remains Gen1 High speed PHY - Ended Successfully DDR3 Training Sequence - Ver TIP-1.26.0 mvSysEnvGetTopologyUpdateInfo: TWSI Read failed WL Supp: IF 0 busId 1 Failed ! WL Supp: IF 0 failed ddr3TipDynamicWriteLevelingSupp failure ******** DRAM initialization Failed (res 0x1) ******** DDR3 run algorithm - FAILED 0x1 DDR3 Training Sequence - FAILED ********** DRAM initialization failed! ******** -- Dilyan

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