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path: root/src/drivers/pc80/rtc/mc146818rtc.c
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2021-08-23include/bcd: move bcd code to commonlib/bsd/includeRicardo Quesada
Move bcd2bin() / bin2bcd() functions to commonlib/bsd/include/ Also, the license is changed from GPL to BSD. This is because it is needed from "utils" (see CL in the chain). For reference bin2bcd() & bcd2bin() are very simple functions. There are already BSD implementations, like these ones (just to name a few): https://chromium.googlesource.com/chromiumos/platform/mosys/+/refs/heads/main/include/lib/math.h#67 http://web.mit.edu/freebsd/head/sys/contrib/octeon-sdk/cvmx-cn3010-evb-hs5.c BUG=b:172210863 TEST=make (everything compiled Ok). Change-Id: If2eba82da35838799bcbcf38303de6bd53f7eb72 Signed-off-by: Ricardo Quesada <ricardoq@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/56904 Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Paul Menzel <paulepanter@mailbox.org> Reviewed-by: Jack Rosenthal <jrosenth@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2021-07-23drivers/pc80/rtc: Make use of alt-century byte configurableNico Huber
This legacy alt-century byte sits amidst CMOS and conflicts many option tables. It usually has no meaning to the hardware and needs to be main- tained manually. Let's disable its usage by default if the CMOS option table is enabled. Change-Id: Ifba3d77120c2474393ac5e64faac1baeeb58c893 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/56214 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
2021-05-30drivers/pc80/mc146818rtc: Check date and time for sanityWerner Zeh
There are cases where the RTC_VRT bit in register D stays set after a power failure while the real date and time registers can contain rubbish values (can happen when RTC is not buffered). If we do not detect this invalid date and/or time here and keep it, Linux will use these bad values for the initial timekeeper init. This in turn can lead to dates before 1970 in user land which can break a lot assumptions. To fix this, check date and time sanity when the RTC is initialized and reset the values if needed. Change-Id: I5bc600c78bab50c70372600347f63156df127012 Signed-off-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/54914 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Paul Menzel <paulepanter@mailbox.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-08-18src: Remove unused '<option.h>'Elyes HAOUAS
Change-Id: Icb79d60e9ec70a0780d5231698b88cff1db72c9b Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/44097 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2020-07-26src: Change BOOL CONFIG_ to CONFIG() in comments & stringsMartin Roth
The Kconfig lint tool checks for cases of the code using BOOL type Kconfig options directly instead of with CONFIG() and will print out warnings about it. It gets confused by these references in comments and strings. To fix it so that it can find the real issues, just update these as we would with real issues. Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: I5c37f0ee103721c97483d07a368c0b813e3f25c0 Reviewed-on: https://review.coreboot.org/c/coreboot/+/43824 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2020-06-02src: Remove unused '#include <cbfs.h>'Elyes HAOUAS
Found using: diff <(git grep -l '#include <cbfs.h>' -- src/) <(git grep -l 'cbfs_boot_map_optionrom\|cbfs_boot_map_optionrom_revision\|cbfs_boot_locate\|cbfs_boot_map_with_leak\|cbfs_locate_file_in_region\|cbfs_boot_load_file\|cbfs_load_and_decompress\|cbfs_prog_stage_load\|cbfs_boot_region_device' -- src/) |grep '<' |grep -v vendorcode Also add missing 'include <cbfs.h>' in src/soc/qualcomm/sc7180/qupv3_config.c Change-Id: Icaecb5b910888f34cddedab7b2f64eaf6d01ad66 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41682 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-05-18src: Remove unused 'include <string.h>'Elyes HAOUAS
Unused includes found using following commande: diff <(git grep -l '#include <string.h>' -- src/) <(git grep -l 'memcpy\|memmove\|memset\|memcmp\|memchr\|strdup\|strconcat\|strnlen\|strlen\|strchr\|strncpy\|strcpy\|strcmp\|strncmp\|strspn\|strcspn\|atol\|strrchr\|skip_atoi\|STRINGIFY' -- src/) |grep -v vendorcode |grep '<' Change-Id: Ibaeec213b6019dfa9c45e3424b38af0e094d0c51 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41242 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com>
2020-05-11treewide: Remove "this file is part of" linesPatrick Georgi
Stefan thinks they don't add value. Command used: sed -i -e '/file is part of /d' $(git grep "file is part of " |egrep ":( */\*.*\*/\$|#|;#|-- | *\* )" | cut -d: -f1 |grep -v crossgcc |grep -v gcov | grep -v /elf.h |grep -v nvramtool) The exceptions are for: - crossgcc (patch file) - gcov (imported from gcc) - elf.h (imported from GNU's libc) - nvramtool (more complicated header) The removed lines are: - fmt.Fprintln(f, "/* This file is part of the coreboot project. */") -# This file is part of a set of unofficial pre-commit hooks available -/* This file is part of coreboot */ -# This file is part of msrtool. -/* This file is part of msrtool. */ - * This file is part of ncurses, designed to be appended after curses.h.in -/* This file is part of pgtblgen. */ - * This file is part of the coreboot project. - /* This file is part of the coreboot project. */ -# This file is part of the coreboot project. -# This file is part of the coreboot project. -## This file is part of the coreboot project. --- This file is part of the coreboot project. -/* This file is part of the coreboot project */ -/* This file is part of the coreboot project. */ -;## This file is part of the coreboot project. -# This file is part of the coreboot project. It originated in the - * This file is part of the coreinfo project. -## This file is part of the coreinfo project. - * This file is part of the depthcharge project. -/* This file is part of the depthcharge project. */ -/* This file is part of the ectool project. */ - * This file is part of the GNU C Library. - * This file is part of the libpayload project. -## This file is part of the libpayload project. -/* This file is part of the Linux kernel. */ -## This file is part of the superiotool project. -/* This file is part of the superiotool project */ -/* This file is part of uio_usbdebug */ Change-Id: I82d872b3b337388c93d5f5bf704e9ee9e53ab3a9 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41194 Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-05-02acpi: Move ACPI table support out of arch/x86 (3/5)Furquan Shaikh
This change moves all ACPI table support in coreboot currently living under arch/x86 into common code to make it architecture independent. ACPI table generation is not really tied to any architecture and hence it makes sense to move this to its own directory. In order to make it easier to review, this change is being split into multiple CLs. This is change 3/5 which basically is generated by running the following command: $ git grep -iIl "arch/acpi" | xargs sed -i 's/arch\/acpi/acpi\/acpi/g' BUG=b:155428745 Change-Id: I16b1c45d954d6440fb9db1d3710063a47b582eae Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40938 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
2020-04-06src/drivers: Use SPDX for GPL-2.0-only filesAngel Pons
Done with sed and God Lines. Only done for C-like code for now. Change-Id: I38eaffa391ed5971217ffad74a312b1641e431c9 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40051 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
2020-02-24treewide: Capitalize 'CMOS'Elyes HAOUAS
Change-Id: I1d36e554618498d70f33f6c425b0abc91d4fb952 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38928 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Peter Lemenkov <lemenkov@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-01-09drivers/pc80/rtc: Separate {get|set}_option() supportKyösti Mälkki
Move things depending on option_table.h to a separate file. Change-Id: Ib23fcd89bf4efef9072fcaea1d8699145c1f2983 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38193 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-01-09drivers/pc80/rtc: Separate {get|set}_option() prototypesKyösti Mälkki
Long-term plan is to support loading runtime configuration from SPI flash as an alternative, so move these prototypes outside pc80/. Change-Id: Iad7b03dc985550da903d56b3deb5bd736013f8f1 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38192 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-01-09drivers/pc80/rtc: Remove duplicate cmos_chksum_valid()Kyösti Mälkki
Change-Id: I5a4b86921876c24cd1d310b674119b960c3d2fd6 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38194 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-01-07drivers/pc80/rtc: Refactor clear_cmos variableKyösti Mälkki
After refactoring it is more a status variable rather than a request. Change-Id: I50b8099a08b556129416cea50f0ce6fafe6c14cc Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38185 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Patrick Rudolph <siro@das-labor.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-01-07drivers/pc80/rtc: Clean up some inlined functionsKyösti Mälkki
Change-Id: Ie73797b4e9a09605a0685f0b03cb85e9a3be93ad Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38179 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2020-01-02drivers/pc80/mc146818rtc: Remove read_option_lowlevel()Kyösti Mälkki
This was a workaround for romcc. Change-Id: I34f41390afbd88f3ace7003fd18c2edd56712a67 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37954 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-11-22drivers/pc80/rtc: Remove CMOS spinlockKyösti Mälkki
This was only used with amdfam10h-15h, and only in romstage while commentary elsewhere says concurrent CMOS and CBFS access caused issues. We would want a cleaner approach on this, if re-implemented. Change-Id: I8512196cb55ff2b4542b1421a1bbae540450115a Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37074 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2019-10-27src: Use 'include <boot/coreboot_tables.h>' when appropriateElyes HAOUAS
Change-Id: I3d90e46ed391ce323436750c866a0afc3879e2e6 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36359 Reviewed-by: Martin Roth <martinroth@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-10-23drivers/pc80/rtc: Avoid searching for cmos_layout.bin on each get/set_optionArthur Heymans
Avoid searching for cmos_layout.bin each time get/set_option is called on platforms with NO_CAR_GLOBAL_MIGRATION. Change-Id: Ie541017d2f8c8e9d4b592b71f44a08fd9670dd09 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35848 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2019-10-22AUTHORS: Move src/drivers/[l*-v*] copyrights into AUTHORS fileMartin Roth
As discussed on the mailing list and voted upon, the coreboot project is going to move the majority of copyrights out of the headers and into an AUTHORS file. This will happen a bit at a time, as we'll be unifying license headers at the same time. Updated Authors file is in a separate commit. Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: Ia0a07df6ca1fdaa2837ce8839057057cbd44d157 Reviewed-on: https://review.coreboot.org/c/coreboot/+/36181 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-09-13drivers/pc80: Remove some __PRE_RAM__ and __SMM__Kyösti Mälkki
Change-Id: Ic90df69c27d524086405238b9683a69771c1b9d5 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35388 Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-05-29src/{device,drivers}: Add missing 'include <types.h>'Elyes HAOUAS
<types.h> is supposed to provide <stdint.h> and <stddef.h>. So when <types.h> is included, <stdint.h> and/or <stddef.h> is removed. Change-Id: I3395715f9e2b03175089186ab2e57d9e508fc87c Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32806 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
2019-05-06Fix code that would trip -Wtype-limitsJulius Werner
This patch fixes up all code that would throw a -Wtype-limits warning. This sometimes involves eliminating unnecessary checks, adding a few odd but harmless casts or just pragma'ing out the warning for a whole file -- I tried to find the path of least resistance. I think the overall benefit of the warning outweighs the occasional weirdness. Change-Id: Iacd37eb1fad388d9db7267ceccb03e6dcf1ad0d2 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32537 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-04-05drivers/pc80/rtc/mc146818rtc.c: Reset RTC time on RTC power failureFrans Hendriks
RTC time contains invalid values on system without RTC battery. Handle 'invalid' the same way as 'cmos_invalid'. This will reset CMOS date when calling function enables 'invalid'. BUG=N/A TEST=Portwell PQ-M107 booting Linux Embedded Change-Id: I5eae57d00f328400a8b03c28b7ecdbbc71522206 Signed-off-by: Frans Hendriks <fhendriks@eltan.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/29329 Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-03-08coreboot: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX)Julius Werner
This patch is a raw application of find src/ -type f | xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g' Change-Id: I6262d6d5c23cabe23c242b4f38d446b74fe16b88 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31774 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2018-08-20drivers/pc80/rtc: do not warn if CMOS options are unavailableStefan Tauner
Callers should have a default ready and get noticed by the return value of get_option(). No need to scare log readers at this location. Change-Id: Ied373d8a02afdc8d1017c9f41d9004e3797dfbb3 Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at> Reviewed-on: https://review.coreboot.org/28215 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-06-28vboot: Fix linking error with USE_OPTION_TABLE enabledPatrick Rudolph
Fix a linking problem with VBOOT and USE_OPTION_TABLE enabled. Make use of cbfs_locate_file_in_region() and always search the cmos_layout.bin in the 'COREBOOT' region. With this change applied there's no need to include the vboot_locator in SMM any more, we can't break NVRAM with different CMOS layouts, and we keep VBOOT and non VBOOT behaviour the same. Only include cmos_layout.bin and cmos.default in RO region. Add notes explaining the decisions. Tested on Intel Sandybridge, builds and boots with vboot enabled. Change-Id: I10ae94d7936581bbb5ea49384122062bd4934ea5 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/26863 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2017-10-22security/vboot: Move vboot2 to security kconfig sectionPhilipp Deppenwiese
This commit just moves the vboot sources into the security directory and fixes kconfig/makefile paths. Fix vboot2 headers Change-Id: Icd87f95640186f7a625242a3937e1dd13347eb60 Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org> Reviewed-on: https://review.coreboot.org/22074 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com>
2017-09-20vboot: remove init_vbnv_cmos()Aaron Durbin
Instead of having each potential caller deal with the differences of cmos_init() and init_vbnv_cmos() when VBOOT is enabled put the correct logic within the callee, cmos_init(), for handling the vbnv in CMOS. The internal __cmos_init() routine returns when the CMOS area was cleared. BUG=b:63054105 Change-Id: Ia124bcd61d3ac03e899a4ecf3645fc4b7a558f03 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/21549 Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2017-07-13src/drivers: add IS_ENABLED() around Kconfig symbol referencesMartin Roth
Some of these can be changed from #if to if(), but that will happen in a follow-on commmit. Change-Id: Ib3a1cf04482a8f19b159c31cfb16a7b492748d91 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/20352 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2017-05-13drivers/pc80/rtc: Rename mc146818rtc_early.c -> _romcc.cNico Huber
And don't link it. It's for ROMCC. To make code happy that uses the ROMCC interface read_option(), read_option_lowlevel() is ported to mc146818rtc.c along with a message to use get_option() instead. Change-Id: I54ea08de034766c8140b320075d36d5e811582fa Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: https://review.coreboot.org/19663 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2017-01-26drivers/pc80/rtc: Check cmos checksum BEFORE reading cmos valueMartin Roth
If cmos is invalid, it doesn't make sense to read the value before finding that out. Change-Id: Ieb4661aad7e4d640772325c3c6b184de1947edc3 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/18236 Tested-by: build bot (Jenkins) Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-12-13pc80: Move set_boot_successful()Kyösti Mälkki
Don't implement arch or driver -specific code under lib/, Change-Id: If75980ec5efc622582e2b5e124ad0e7ee3fa39a3 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/17793 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-11-17rtc: Force negative edge on SET after battery replacementMarshall Dawson
After the RTC coin cell has been replaced, the Update Cycle Inhibit bit must see at least one low transition to ensure the RTC counts. The reset value for this bit is undefined. Examples have been observed where batteries are installed on a manufacturing line, the bit's state comes up low, but the RTC does not count. Change-Id: I05f61efdf941297fa9ec90136124b0c8fe0639c6 Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-on: https://review.coreboot.org/17370 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-11-17rtc: Check update-in-progress bitMarshall Dawson
While the real-time clock updates its count, values may not be correctly read or written. On reads, ensure the UIP bit is clear which guarantees a minimum of 244 microseconds exists before the update begins. Writes already avoid the problem by disabling the RTC count via the SET bit. Change-Id: I39e34493113015d32582f1c280fafa9e97f43a40 Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-on: https://review.coreboot.org/17369 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-05-06rtc: Do checksum check for all bytesStefan Reinauer
Due to missing braces (that went undetected because of the indentation), I584189d9fcf7c9b831d9c020ee7ed59bb5ae08e8 CMOS: add set_option() only takes the last changed byte into regard when determining whether the checksum needs to be updated. This bug went undetected for 5 years. Change-Id: I47cedc801a60959386dfdcda3a13b8e3162a7ecb Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: https://review.coreboot.org/14616 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>
2016-04-19kbuild: Allow drivers to fit src/drivers/[X]/[Y]/ schemeStefan Reinauer
Reorder drivers to fit src/drivers/[X]/[Y]/ scheme to make them pluggable. Also, fix up the following driver subdirectories by switching to the src/drivers/[X]/[Y]/ scheme as these are hard requirements for the main change: * drivers/intel * drivers/pc80 * drivers/dec Change-Id: I455d3089a317181d5b99bf658df759ec728a5f6b Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: https://review.coreboot.org/14047 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 20:33:51 +0000