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* hwaccess: replace flashrom specific macros by compiler definesThomas Heijligen2021-10-151-2/+0
| | | | | | | | | | Replace the remaining IS_* macros with the associated compiler defines Change-Id: Ia0f022d12390722816066d292e1878824adc613c Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.de> Reviewed-on: https://review.coreboot.org/c/flashrom/+/58280 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
* serial: Fix file read/write error handling for WindowsDavid Hendricks2020-07-071-8/+22
| | | | | | | | | | | | | | | | | | | File read/write semantics are different between POSIX and Windows. In particular Windows file read/write functions return a boolean type to indicate success or failure, while the POSIX equivalents return a signed integer indicating number of bytes read if successful or -1 if not. This attempts to correct some error handling paths for Windows and avoid invalid comparisons that were causing compilation issues. Reported on https://github.com/flashrom/flashrom/issues/149 Change-Id: Ib179d51ede2dbd38f54f3641bfe90340a6a87e31 Signed-off-by: David Hendricks <david.hendricks@gmail.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/43051 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
* Fix -Wsign-compare troubleNico Huber2019-07-311-6/+6
| | | | | | | | | | | Mostly by changing to `unsigned` types where applicable, sometimes `signed` types, and casting as a last resort. Change-Id: I08895543ffb7a48058bcf91ef6500ca113f2d305 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/flashrom/+/30409 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jacob Garber <jgarber1@ualberta.ca>
* Fix typosElyes HAOUAS2018-08-191-1/+1
| | | | | | | | Change-Id: I20745d5f30f9577622e27abf2f45220f026f65ac Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/28206 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
* Remove address from GPLv2 headersElyes HAOUAS2018-04-241-4/+0
| | | | | | | | Change-Id: I7bfc339673cbf5ee2d2ff7564c4db04ca088d0a4 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/25381 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
* Fix serprog on FreeBSDMichael Zhilin2017-10-191-1/+1
| | | | | | | | | | | | | | | | | | | | Using serprog on FreeBSD to read an SPI flash (MX25L6406) via an Arduino Nano V3 with flashrom hangs after 5 seconds while reading. The problem is that kernel method "ttydisc_rint" ignores some bytes. It happens due to enabled IEXTEN local flag of termios. TTY cuts a few bytes, Arduino reads 11264 bytes, but flashrom gets only 11244 bytes and waits for the remaining 20 bytes. The fix is simple: turn off the IEXTEN local flag. Tested on Arduino Nano V3 + FreeBSD 12-CURRENT. Change-Id: I7aa6a283d523c544d9b8923cd4c622bf08c0fb3f Signed-off-by: Michael Zhilin <mizhka@gmail.com> Reviewed-on: https://review.coreboot.org/21919 Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Urja Rannikko <urjaman@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
* serial: Support custom baud rates on linuxUrja Rannikko2017-10-191-10/+22
| | | | | | | | | | | The function to do this is contained in custom_baud.c because of broken include stuff. Change-Id: I2a20f9182cb85e7bce5d6654a2caf20e6202b195 Signed-off-by: Urja Rannikko <urjaman@gmail.com> Reviewed-on: https://review.coreboot.org/20224 Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
* Fix file descriptor leak in serial.cStefan Tauner2016-01-161-4/+6
| | | | | | | | | Found by Coverity as "CID 1348465: Resource leaks". Corresponding to flashrom svn r1915. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* serial: support arbitrary baud rates on WindowsUrja Rannikko2016-01-041-30/+34
| | | | | | | | | | | | Available baud rates obviously depend on driver support, but the CBR_ defines used so far are basically only for backwards source compatibility with Win16, so dont bother with them. Corresponding to flashrom svn r1909. Signed-off-by: Urja Rannikko <urjaman@gmail.com> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* serprog: allow to omit specifying a baud rateStefan Tauner2016-01-041-10/+15
| | | | | | | | | | | On USB-based serial connections (VCP) the requested baud rate usually does not matter (much). Remove the arbitrary restriction and use whatever default values the OS/hardware provides. Corresponding to flashrom svn r1907. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Urja Rannikko <urjaman@gmail.com>
* serprog: ignore failures when setting serial port optionsStefan Tauner2016-01-041-5/+18
| | | | | | | | | | | | There is no good reason to abort earlier just because some options did not stick. This should improve compatibility without negative effects. If communication is affected by the missing flag(s) then we abort later anyway. Corresponding to flashrom svn r1906. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Urja Rannikko <urjaman@gmail.com>
* serprog: clear NDELAY flag only once after opening the portStefan Tauner2016-01-041-5/+13
| | | | | | | | | | | Change sp_openserport() to directly clear the O_NONBLOCK flag that is potentially set by opening the device with O_NDELAY instead of clearing ALL flags in serialport_config() unconditionally. Corresponding to flashrom svn r1905. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Urja Rannikko <urjaman@gmail.com>
* Unify target OS and CPU architecture checksStefan Tauner2015-01-101-19/+21
| | | | | | | | | | | | | | | | | | | | | | We do CPU architecture checks once for the makefile in arch.h and once for HW access abstraction in hwaccess.c. This patch unifies related files so that they can share the checks to improve maintainability and reduce the chance of inconsistencies. Furthermore, it refines some of the definitions, which - adds "support" for AARCH64 and PPC64, - adds big-endian handling on arm as well as LE handling on PPC64, - fixes compilation of internal.c on AARCH64 and PPC64. Additionally, this patch continues to unify all OS checks in flashrom by adding a new helper macro IS_WINDOWS. The old header file for architecture checking is renamed to platform.h to reflect its broader scope and all new macros are add in there. Corresponding to flashrom svn r1864. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* CID1129998/1129999: Unchecked return value from libraryStefan Reinauer2014-05-271-7/+30
| | | | | | | | | | | | | | Check return values of various fcntl() invocations in serialport_config(), serialport_read_nonblock() and serialport_write_nonblock(). Also, remove some superfluous print conversion specifiers and refine messages. Corresponding to flashrom svn r1803. Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Add 'const' keyword to chip write and other function prototypesMark Marshall2014-05-091-2/+2
| | | | | | | | | | Corresponding to flashrom svn r1789. Inspired by and mostly based on a patch Signed-off-by: Mark Marshall <mark.marshall@omicron.at> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* serial: use internal_delay() for timeoutsUrja Rannikko2013-10-191-1/+1
| | | | | | | | | | | | | Using programmer_delay() for timeouts in serial writes could cause a (theoretically) endless recursion if serial communication is used to send the programmer the delay command to be executed on the programmer instead of the host which fails again, following a timeout which sends... Corresponding to flashrom svn r1759. Signed-off-by: Urja Rannikko <urjaman@gmail.com> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Get rid of sp_die()Stefan Tauner2013-08-241-6/+0
| | | | | | | | | | | | | | - Add return values to sp_flush_stream(), sp_pass_writen(), sp_execute_opbuf(), sp_execute_opbuf_noflush(), sp_check_opbuf_usage(), sp_do_read_n(). - Use those return values to propagate errors instead of exiting. In some places this has to wait for core API changes (error handling for chip_readb, chip_readn, chip_write) hence comments are added instead. Corresponding to flashrom svn r1719. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Introduce serialport_config()Stefan Tauner2013-08-231-46/+59
| | | | | | | | | | This allows to easily reconfigure a serial port as needed in the Bus Pirate speedup patch. Corresponding to flashrom svn r1717. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Initialize sp_fd and fix baud rate setting on windowsStefan Tauner2013-04-131-2/+2
| | | | | | | Corresponding to flashrom svn r1669. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* serial.c: be more pedanticStefan Tauner2013-04-011-16/+44
| | | | | | | | | | Check more return codes and close the file handle in case of errors in sp_openserport(). Corresponding to flashrom svn r1664. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Replace native calls in serprog with wrapper callsStefan Tauner2013-04-011-1/+1
| | | | | | | | | | Read(), write(), usleep() are replaced. Corresponding to flashrom svn r1663. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Signed-off-by: Idwer Vollering <vidwer@gmail.com> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Introduce serialport_write_nonblock()Stefan Tauner2013-04-011-0/+72
| | | | | | | | | | | | | It seems useful to have a generic and platform-independent method to read and write to a serial port without blocking. This is the write part. This allows to get rid of the explicit temporary disabling of blocking I/O in serprog's sp_synchronize(). Corresponding to flashrom svn r1662. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Replace sp_sync_read_timeout() with serialport_read_nonblock()Stefan Tauner2013-04-011-0/+70
| | | | | | | | | | | | | | | It seems useful to have a generic and platform-independent method to read and write to a serial port without blocking. This is the read part. It stores the current blocking properties before disabling blocking and restores them after reading. The timeout is implemented as previously by retrying every millisecond until the timeout is reached or enough characters are available. Corresponding to flashrom svn r1661. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* serial.c: round baudrates to valid onesStefan Tauner2013-04-011-40/+63
| | | | | | | | | | | | | | | | | MSDN says: "The baud rate at which the communications device operates. This member can be an actual baud rate value, or one of the following indexes." But it is not specified what happens for different values, so we round down to valid ones (or to the minimum of 9600) by reusing the existing struct baudentry sp_baudtable[] and the new function round_baud(). Do similarly on non-Windows where arbitrary values are not allowed anyway. Corresponding to flashrom svn r1660. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* serial.c: abstract system error printingStefan Tauner2013-04-011-6/+28
| | | | | | | | | | | Windows is awkward. The win32 API does not support errno/strerror as one might expect. Introduce a new msg_* function that alleviates the pain a bit (my head still hurts very badly). Corresponding to flashrom svn r1659. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Break endless loop in serialport_write()Stefan Tauner2012-11-301-3/+11
| | | | | | | | | | | Serialport_write could loop endlessly when used with a seemingly valid port that does always return 0 on writes instead of an error. Give up after about 125 ms i.e. 250 tries with a period of 500 us. Corresponding to flashrom svn r1626. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Idwer Vollering <vidwer@gmail.com>
* Remove exit calls from sp_sync_read_timeout and sp_synchronizeNiklas Söderlund2012-09-071-0/+1
| | | | | | | | | | | | | | | | | | Add return values to sp_synchronize so we can signal a failure to the only upstream caller (serprog_init), which is prepared to propagate a failure. sp_sync_read_timeout was harder to fix because it already used a return value, but we needed to distinguish two different failure modes. This solution distinguishes them by the sign of the return values, which maintains readability as much as possible. Thanks to Niklas Söderlund for the original patch and idea. Corresponding to flashrom svn r1595. Signed-off-by: Niklas Söderlund <niso@kth.se> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Fix compilation with MinGWStefan Tauner2012-09-011-7/+7
| | | | | | | | | | This was broken since r1557 when we got rid of some exit calls, but returned -1 instead which is not a valid HANDLE value. Corresponding to flashrom svn r1591. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Idwer Vollering <vidwer@gmail.com>
* Remove more exit callsNiklas Söderlund2012-07-301-11/+18
| | | | | | | | | | | | | | | | This patch removes the remaining exit calls from - sp_openserport - sp_opensocket - sp_docommand - internal_init Almost all of this was done by Niklas. Corresponding to flashrom svn r1557. Signed-off-by: Niklas Söderlund <niso@kth.se> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
* Add serial port bitbanging codeVirgil-Adrian Teaca2012-04-301-0/+55
| | | | | | | | | | | This adds the pony_spi driver which supports the SI_Prog adapter, which is commonly used for SPI chips with PonyProg 2000, and a custom adapter called "SERBANG" which differs in the logic of two pins. Corresponding to flashrom svn r1525. Signed-off-by: Virgil-Adrian Teaca <darkstarlinux@gmail.com> Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
* Fix unchecked malloc calls and casts of malloc return valuesStefan Tauner2011-07-121-0/+2
| | | | | | | | | | | | In the long term the exit calls should be replaced by returns. until then this is the correct way to handle failures. the casts are not needed (in C) and we don't cast malloc return values anywhere else. Corresponding to flashrom svn r1370. Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
* Fix and improve Windows/MinGW/MSYS buildUwe Hermann2011-07-031-2/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | - Makefile: Use $(OS_ARCH) to add some MinGW-specific workarounds and settings, so that a simple "make" is sufficient on MinGW (instead of manual Makefile hacking). - Explicitly set CC=gcc in the Makefile, otherwise you get an error like "cc: command not found" on MinGW. - MinGW doesn't have ffs(), use gcc's __builtin_ffs() instead. - Add /usr/local/include and /usr/local/lib to CPPFLAGS/LDFLAGS, that's where libusb-win32 and libftdi stuff is usually placed on MinGW/MSYS. - Disable serprog (no sockets) and all PCI-based programmers (no libpci) for now. That leaves dummy, ft2232_spi, and buspirate_spi enabled on MinGW per default. - serial.c: Use correct type for 'tmp', both on Windows/MinGW (DWORD) and POSIX (ssize_t). Corresponding to flashrom svn r1363. Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
* Use shutdown callback mechanism to shutdown programmersDavid Hendricks2011-06-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch attempts to resolve some programmer shutdown ordering issues by having the programmer init functions register shutdown callbacks explicitly wherever it makes most sense. Before, assumptions were made that could lead to the internal programmer's state changing before the external programmer could be shut down properly. Now, each programmer cleans up after itself and (hopefully) performs each operation in the correct order. As a side-effect, this patch gives us a better usage model for reverse operations such as rpci_* and rmmio_*. In the long-run, this should make reversing the initialization process easier to understand, less tedious, and less error-prone. In short, this patch does the following: - Registers a shutdown callback during initialization for each programmer. - Kills the .shutdown function pointer from programmer_entry struct. Also, make most shutdown functions static. - Adds a few minor clean-ups and corrections (e.g. missing physunmap() calls). TODO: Remove forward declaration of serprog_shutdown() (added to simplify diff) Corresponding to flashrom svn r1338. Signed-off-by: David Hendricks <dhendrix@google.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
* Multiple unrelated changesCarl-Daniel Hailfinger2010-10-081-2/+3
| | | | | | | | | | | | | | | CONFIG_BITBANG_SPI was not selected if CONFIG_NICINTEL_SPI was on by default. Wiki output was missing all flash chips if CONFIG_INTERNAL was not selected. Use correct type for toupper()/tolower()/isspace() functions. Specify software requirements in a generic way. Non-x86 compilation does not work with the default programmer set, so list the make parameters which result in a working build. Corresponding to flashrom svn r1203. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
* Remove duplicate includes from the codeStefan Reinauer2010-10-061-1/+0
| | | | | | | Corresponding to flashrom svn r1196. Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
* Handle Bus Pirates already in bit banging mode correctlyCarl-Daniel Hailfinger2010-09-161-2/+6
| | | | | | | | | | | | | | | | | | | | Thanks to Johannes Sjölund for reporting that the Bus Pirate init could not deal with a Bus Pirate which is already in binary Bitbang mode. This is caused by a combination of the slowness of the Bus Pirate, the slowness of USB and a fast serial port flush routine which just flushes the buffer contents and does not wait until data arrival stops. Make the Bus Pirate init more robust by running the flush command 10 times with 1.5 ms delay in between. This code development was sponsored by Mattias Mattsson. Thanks! Tested a few dozen times, should work reliably. Corresponding to flashrom svn r1178. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Mattias Mattsson <vitplister@gmail.com>
* Split off programmer.h from flash.hCarl-Daniel Hailfinger2010-07-271-1/+2
| | | | | | | | | | | | | | | | | | | | | Programmer specific functions are of absolutely no interest to any file except those dealing with programmer specific actions (special SPI commands and the generic core). The new header structure is as follows (and yes, improvements are possible): flashchips.h flash chip IDs chipdrivers.h chip-specific read/write/... functions flash.h common header for all stuff that doesn't fit elsewhere hwaccess.h hardware access functions programmer.h programmer specific functions coreboot_tables.h header from coreboot, internal programmer only spi.h SPI command definitions Corresponding to flashrom svn r1112. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
* Various coding style and cosmetic changesUwe Hermann2010-03-131-11/+12
| | | | | | | | | | | | | - Fix coding-style, whitespace, and indentation in a few places. - Consistently use the same spelling ("Super I/O") everywhere. Corresponding to flashrom svn r933. - Make some flashrom stdout output look a bit nicer. Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
* Windows wants UNC names for COM ports >9 (legacy COM ports only work with ↵Patrick Georgi2010-01-261-1/+9
| | | | | | | | | | | | | one digit) As UNC also works for smaller names, just retarget all requests for dev=COMx on win32 to \\.\COMx. Tested with large and small COM port numbers on XP. Corresponding to flashrom svn r883. Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
* Convert all messages in serial.c to the new message infrastructureSean Nelson2010-01-091-3/+3
| | | | | | | Corresponding to flashrom svn r848. Signed-off-by: Sean Nelson <audiohacked@gmail.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
* Buspiratespi support on mingwPatrick Georgi2010-01-061-4/+53
| | | | | | | Corresponding to flashrom svn r832. Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
* Multiple unrelated changesPatrick Georgi2010-01-061-29/+9
| | | | | | | | | | | | | | | - replace the hand written serial input flush routine with the termios one. - serialport_discard_read isn't necessary anymore - it just wrapped sp_flush_incoming with no extra value. - serialport_read and serialport_write would misbehave if read or write didn't process everything in one go. - sp_flush_incoming should be #define'd out for FAKE_COMMUNICATION like serialport_discard_read was Corresponding to flashrom svn r831. Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de> Acked-by: Sean Nelson <audiohacked@gmail.com>
* Move OS-dependent serial code from buspirate_spi.c to serial.cCarl-Daniel Hailfinger2010-01-061-0/+52
| | | | | | | | | | While at it, also rename a few functions to make it obvious that they are generic and not specific to the Bus Pirate. Corresponding to flashrom svn r830. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Patrick Georgi <patrick.georgi@coresystems.de>
* Move serial handling from serprog.c to serial.cCarl-Daniel Hailfinger2009-11-231-0/+142
This is the first step in enabling platform independent serprog and it also allows other drivers to use serial port functionality without requiring serprog. Pure code move, no code changed. Corresponding to flashrom svn r771. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
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