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dummyflasher.c: Fix null par data and size param handling

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This patch fixes a few bugs that two patches ( `3149822cd45cb2e5841e15d648783748ba1b2ec6` && `3b8fe0f8e907c0ba9f7c7935e950f3e1538d427f`) brought:
 * Check the presence of 'size' param only if the emulate is VARIABLE_SIZE.
 * Initialize 'flash->st->par.data' in dummy_init() so that it can probe the VARIABLE_SIZE emulator correct in probe_variable_size().
 * Replace atoi() with strtol().
 * Revise man page to describe how to use the VARIABLE_SIZE emulation target.

TEST:
$ flashrom -p dummy:image=dummy.bin,emulate=VARIABLE_SIZE,size=16777216 \
-w ${IMG} -V -f
...
Verifying flash... VERIFIED.
Writing dummy.bin

$ flashrom -p dummy:image=dummy.bin,emulate=VARIABLE_SIZE -w ${IMG} -V -f
...
dummy_init: the size parameter is not given.
Unhandled programmer parameters (possibly due to another failure): image=dummy.bin,
Error: Programmer initialization failed

$ flashrom -p dummy:image=dummy.bin,emulate=SST25VF040.REMS -c SST25LF040A -w ${IMG}
...
Erasing and writing flash chip... Erase/write done.
Verifying flash... VERIFIED.

$ man flashrom
...
 * Dummy vendor VARIABLE_SIZE SPI flash chip (configurable size, page write)

 Example: flashrom -p dummy:emulate=SST25VF040.REMS

 To use VARIABLE_SIZE chip, size must be specified to configure the size of the flash chip as a power of two.

 Example: flashrom -p dummy:emulate=VARIABLE_SIZE,size=16777216,image=dummy.bin
...

Signed-off-by: Namyoon Woo <namyoon@google.com>
Change-Id: Ie6481943a831b946a91b643b4d79e684c27e48b8
Reviewed-on: https://review.coreboot.org/c/flashrom/+/46536
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
This commit is contained in:
Namyoon Woo
2020-10-17 20:25:15 -07:00
committed by Edward O'Callaghan
parent cf1e8f7b90
commit f7a08a8ef2
2 changed files with 20 additions and 6 deletions
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11
flashrom.8.tmpl
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@ -646,8 +646,19 @@ vendor):
.sp
.RB "* Macronix " MX25L6436 " SPI flash chip (8192 kB, RDID, SFDP)"
.sp
.RB "* Dummy vendor " VARIABLE_SIZE " SPI flash chip (configurable size, page write)"
.sp
Example:
.B "flashrom -p dummy:emulate=SST25VF040.REMS"
.sp
To use
.B VARIABLE_SIZE
chip,
.B size
must be specified to configure the size of the flash chip as a power of two.
.sp
Example:
.B "flashrom -p dummy:emulate=VARIABLE_SIZE,size=16777216,image=dummy.bin"
.TP
.B Persistent images
.sp