Flashrom - Revision history

Leo: Added categories and navbox

2021-12-30T00:48:54Z

Added categories and navbox

← Older revision		Revision as of 00:48, 30 December 2021
Line 136:		Line 136:

	I was then able to dump the flash. Yippie.		I was then able to dump the flash. Yippie.

			{{Navbox Linux}}
			[[Category:Linux]]
			[[Category:LinuxUtilities]]

Leo at 07:57, 18 December 2021

2021-12-18T07:57:04Z

@@ Line 18: / Line 18: @@
 ==Using flashrom with a Raspberry Pi==
-=== Compile and install ===
+===Compile and install===
 {{Highlight
 | code = # apt-get install build-essential pciutils usbutils libpci-dev libusb-dev libftdi1 libftdi-dev zlib1g-dev
@@ Line 86: / Line 86: @@
 }}
-== Troubleshooting ==
+==Troubleshooting==
-=== Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on linux_spi. ===
+===Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on linux_spi.===
 I connected a T25S80 to the Raspberry Pi but when I run flashrom, I get a "unknown SPI chip" message:
 {{Highlight
@@ Line 109: / Line 109: @@
 | lang = terminal
 }}
-The message shows the RDID value as being 0x5e 0x32 0x14.
+The message shows the RDID value as being <code>0x5e 0x32 0x14</code>.

Leo at 07:31, 18 December 2021

2021-12-18T07:31:43Z

@@ Line 17: / Line 17: @@
 ==Using flashrom with a Raspberry Pi==
 ===Pinouts===
@@ Line 75: / Line 84: @@
 Found Macronix flash chip "MX25L12835F/MX25L12845E/MX25L12865E" (16384 kB, SPI) on linux_spi.
 Reading flash... done.
-}}<br />
+}}

Leo at 06:18, 18 December 2021

2021-12-18T06:18:37Z

← Older revision		Revision as of 06:18, 18 December 2021
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	==Using flashrom with a Raspberry Pi==		==Using flashrom with a Raspberry Pi==

	=== Pinouts ===		===Pinouts===
	[[File:Raspberry Pi GPIO Header.png\|alt=Raspberry Pi GPIO Header\|thumb\|~~513x513px~~\|Raspberry Pi GPIO Header]]Refer to the table below and the diagram on the right for the pinouts to your Raspberry Pi and the SPI rom device.		[[File:Raspberry Pi GPIO Header.png\|alt=Raspberry Pi GPIO Header\|thumb\|718x718px\|Raspberry Pi GPIO Header]]Refer to the table below and the diagram on the right for the pinouts to your Raspberry Pi and the SPI rom device.
	{\| class="wikitable"		{\| class="wikitable"
	!RPi header!!SPI Function!![https://www.mxic.com.tw/Lists/Datasheet/Attachments/7397/MX25L12835F,%203V,%20128Mb,%20v1.6.pdf MX25L] 16-Pin SOP		!RPi header!!SPI Function!![https://www.mxic.com.tw/Lists/Datasheet/Attachments/7397/MX25L12835F,%203V,%20128Mb,%20v1.6.pdf MX25L] 16-Pin SOP
Line 52:		Line 52:
	\|7		\|7
	\|}The MX25L - WriteProtect (WP#, pin 9) should be connected to GND according to the datasheet. Leaving it floating still seems to work.		\|}The MX25L - WriteProtect (WP#, pin 9) should be connected to GND according to the datasheet. Leaving it floating still seems to work.



	The Raspberry Pi should have SPI enabled by adding this line to {{code\|/boot/config.txt}}:{{highlight\|lang=text\|code=		The Raspberry Pi should have SPI enabled by adding this line to {{code\|/boot/config.txt}}:{{highlight\|lang=text\|code=
	~~device_tree_param~~=spi=on		dtparam=spi=on
	}}The {{code\|/dev/spidev0.0}} device should exist and flashrom should be able to detect the flash chip.{{highlight\|lang=terminal\|code=		}}The {{code\|/dev/spidev0.0}} device should exist and flashrom should be able to detect the flash chip.{{highlight\|lang=terminal\|code=
	[root@alarmpi alarm]# flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000		[root@alarmpi alarm]# flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000

Leo at 04:36, 18 December 2021

2021-12-18T04:36:51Z

← Older revision		Revision as of 04:36, 18 December 2021
Line 1:		Line 1:
	Flashrom is a utility to read flash.		Flashrom is a utility to read flash.

	== Cheat sheet ==		==Cheat sheet==
	{\| class="wikitable"		{\| class="wikitable"
	!Task		!Task
Line 16:		Line 16:
	\|}		\|}

	== Using flashrom with a Raspberry Pi ==		==Using flashrom with a Raspberry Pi==
	[[File:Raspberry Pi GPIO Header.png\|alt=Raspberry Pi GPIO Header\|thumb\|~~731x731px~~\|Raspberry Pi GPIO Header]]
			=== Pinouts ===
			[[File:Raspberry Pi GPIO Header.png\|alt=Raspberry Pi GPIO Header\|thumb\|513x513px\|Raspberry Pi GPIO Header]]Refer to the table below and the diagram on the right for the pinouts to your Raspberry Pi and the SPI rom device.
	{\| class="wikitable"		{\| class="wikitable"
	!RPi header!!SPI ~~flash~~!!MX25L Pin		!RPi header!!SPI Function!![https://www.mxic.com.tw/Lists/Datasheet/Attachments/7397/MX25L12835F,%203V,%20128Mb,%20v1.6.pdf MX25L] 16-Pin SOP
			!HM25Q 8-Pin SOP
	\|-		\|-
	\|25\|\|GND\|\|10		\|25\|\|GND\|\|10
			\|4
	\|-		\|-
	\|24\|\|CS\|\|7		\|24\|\|CS\|\|7
			\|1
	\|-		\|-
	\|23\|\|SCK (CLK)\|\|16		\|23\|\|SCK (CLK)\|\|16
			\|6
	\|-		\|-
	\|21\|\|DO (MISO)\|\|8		\|21\|\|DO (MISO)\|\|8
			\|2
	\|-		\|-
	\|19\|\|DI (MOSI)\|\|15		\|19\|\|DI (MOSI)\|\|15
			\|5
	\|-		\|-
	\|17\|\|VCC 3.3v\|\|2		\|17\|\|VCC 3.3v\|\|2
	\|~~}To read the chip using a Raspberry Pi and flashrom, we can use 1x serial IO by connecting the pins according to this table:~~		\|8
			\|-
	The WriteProtect (WP#, pin 9) should be connected to GND according to the datasheet. Leaving it floating still seems to work.		\|
			\|WP#
			\|9
			\|3
			\|-
			\|
			\|HOLD# / RESET#
			\|3
			\|7
			\|}The MX25L - WriteProtect (WP#, pin 9) should be connected to GND according to the datasheet. Leaving it floating still seems to work.

	~~Refer to the Raspberry Pi pinout at https://i.stack.imgur.com/eLPtx.png.~~

	The Raspberry Pi should have SPI enabled by adding this line to {{code\|/boot/config.txt}}:{{highlight\|lang=text\|code=		The Raspberry Pi should have SPI enabled by adding this line to {{code\|/boot/config.txt}}:{{highlight\|lang=text\|code=

Leo at 04:24, 18 December 2021

2021-12-18T04:24:37Z

← Older revision		Revision as of 04:24, 18 December 2021
Line 18:		Line 18:
	== Using flashrom with a Raspberry Pi ==		== Using flashrom with a Raspberry Pi ==
	[[File:Raspberry Pi GPIO Header.png\|alt=Raspberry Pi GPIO Header\|thumb\|731x731px\|Raspberry Pi GPIO Header]]		[[File:Raspberry Pi GPIO Header.png\|alt=Raspberry Pi GPIO Header\|thumb\|731x731px\|Raspberry Pi GPIO Header]]
	{\| class="wikitable~~" style="float: left; width: auto; margin-right: 10px;~~"		{\| class="wikitable"
	!RPi header!!SPI flash!!MX25L Pin		!RPi header!!SPI flash!!MX25L Pin
	\|-		\|-

Leo: Initial Content

2021-12-18T04:23:58Z

Initial Content

New page

Flashrom is a utility to read flash.

== Cheat sheet ==
{| class="wikitable"
!Task
!Command
|-
|Dump a ROM connected via SPI
|<code>flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -r dump.bin</code>
|-
|Dump a ROM via SPI using a specific chip definition
|<code>flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=600 -c "MX25L12835F/MX25L12845E/MX25L12865E" -w dump.bin</code>
|-
|Write a ROM via SPI
|<code>flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -w new-data-to-rom.bin</code>
|}

== Using flashrom with a Raspberry Pi ==
[[File:Raspberry Pi GPIO Header.png|alt=Raspberry Pi GPIO Header|thumb|731x731px|Raspberry Pi GPIO Header]]
{| class="wikitable" style="float: left; width: auto; margin-right: 10px;"
!RPi header!!SPI flash!!MX25L Pin
|-
|25||GND||10
|-
|24||CS||7
|-
|23||SCK (CLK)||16
|-
|21||DO (MISO)||8
|-
|19||DI (MOSI)||15
|-
|17||VCC 3.3v||2
|}To read the chip using a Raspberry Pi and flashrom, we can use 1x serial IO by connecting the pins according to this table:

The WriteProtect (WP#, pin 9) should be connected to GND according to the datasheet. Leaving it floating still seems to work.

Refer to the Raspberry Pi pinout at https://i.stack.imgur.com/eLPtx.png.

The Raspberry Pi should have SPI enabled by adding this line to {{code|/boot/config.txt}}:{{highlight|lang=text|code=
device_tree_param=spi=on
}}The {{code|/dev/spidev0.0}} device should exist and flashrom should be able to detect the flash chip.{{highlight|lang=terminal|code=
[root@alarmpi alarm]# flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=1000
flashrom v1.0 on Linux 4.14.92-1-ARCH (armv7l)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Macronix flash chip "MX25L12805D" (16384 kB, SPI) on linux_spi.
Found Macronix flash chip "MX25L12835F/MX25L12845E/MX25L12865E" (16384 kB, SPI) on linux_spi.
Multiple flash chip definitions match the detected chip(s): "MX25L12805D", "MX25L12835F/MX25L12845E/MX25L12865E"
Please specify which chip definition to use with the -c <chipname> option.
}}Dump the data using {{code|-r filename}}.{{highlight|lang=terminal|code=
[root@alarmpi alarm]# flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=300 -c "MX25L12835F/MX25L12845E/MX25L12865E" -r dump7.dat
flashrom v1.0 on Linux 4.14.92-1-ARCH (armv7l)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Macronix flash chip "MX25L12835F/MX25L12845E/MX25L12865E" (16384 kB, SPI) on linux_spi.
Reading flash... done.
}}<br />