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Documentation/MX25L6406E.md: add WP test report
Change-Id: Iebef0e9d558dda75b469f467658e7f49e6e00224 Signed-off-by: Maciej Pijanowski <maciej.pijanowski@3mdeb.com>
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| # Flashrom WP test report | ||
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| ## Intro | ||
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| * Chip name as read from the hardware chip itself: `MX25L6406E` | ||
| * Chip name as detected in flashrom: `"MX25L6406E/MX25L6408E"` | ||
| * [RTE](https://docs.dasharo.com/transparent-validation/rte/introduction/) was | ||
| used as an external programmer and to control the WP pin state via software | ||
| - any other programmer could be used there instead | ||
| * [flash.sh](flash.sh) script was used as a wrapper for flashrom commands - | ||
| please refer there if you need to take a look at the full flashrom commands | ||
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|  | ||
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| ## Flashrom version | ||
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| ```shell | ||
| root@rte:~# flashrom --version | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| ``` | ||
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| ## Chip detection | ||
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| ```shell | ||
| root@rte:~# ./flash.sh probe | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Probing ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| No operations were specified. | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
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| ## WP status | ||
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| ```shell | ||
| root@rte:~# ./flash.sh wp-status | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Checking WP status ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Protection range: start=0x00000000 length=0x00000000 (none) | ||
| Protection mode: disabled | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
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| ## WP list | ||
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| ```shell | ||
| root@rte:~# ./flash.sh wp-list | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Checking WP list ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Available protection ranges: | ||
| start=0x00000000 length=0x00000000 (none) | ||
| start=0x007e0000 length=0x00020000 (upper 1/64) | ||
| start=0x007c0000 length=0x00040000 (upper 1/32) | ||
| start=0x00780000 length=0x00080000 (upper 1/16) | ||
| start=0x00700000 length=0x00100000 (upper 1/8) | ||
| start=0x00600000 length=0x00200000 (upper 1/4) | ||
| start=0x00000000 length=0x00400000 (lower 1/2) | ||
| start=0x00400000 length=0x00400000 (upper 1/2) | ||
| start=0x00000000 length=0x00600000 (lower 3/4) | ||
| start=0x00000000 length=0x00700000 (lower 7/8) | ||
| start=0x00000000 length=0x00780000 (lower 15/16) | ||
| start=0x00000000 length=0x007c0000 (lower 31/32) | ||
| start=0x00000000 length=0x007e0000 (lower 63/64) | ||
| start=0x00000000 length=0x00800000 (all) | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
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| ## WP enable | ||
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| * Set region `0,0x00800000` (whole chip) and enable protection: | ||
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| ```shell | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Setting WP region ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Activated protection range: start=0x00000000 length=0x00800000 (all) | ||
| Enabling WP region ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Enabled hardware protection | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
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| * Check the status after locking: | ||
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| ```shell | ||
| root@rte:~# ./flash.sh wp-status | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Checking WP status ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
|
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Protection range: start=0x00000000 length=0x00800000 (all) | ||
| Protection mode: hardware | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
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| * We can see that the `protection range` was set as desired | ||
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| * We can see that the `protection mode` was changed to `hardware` | ||
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| ## Test WP protection | ||
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| * Drive the WP pin LOW: | ||
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| ```shell | ||
| root@rte:~# ./flash.sh wp-low | ||
| Setting WP pin LOW ... | ||
| ``` | ||
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| * Try erasing: | ||
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| ```shell | ||
| root@rte:~# ./flash.sh erase | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Erasing chip ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
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| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Unsetting lock bit(s) failed. | ||
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| WARNING!: Updating only part of the image might render your device unusable if old and | ||
| new parts are not compatible! | ||
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| If you think you know what you're doing, pass --skip-wp-area to exclude | ||
| protected part of the flash from the operation. | ||
| Your flash chip is in an unknown state. | ||
| Please report this to the mailing list at flashrom@flashrom.org or | ||
| on IRC (see https://www.flashrom.org/Contact for details), thanks! | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
| ## Disable WP protection | ||
| * Set region `0,0` and disable protection (with WP pin still being LOW): | ||
| ```shell | ||
| root@rte:~# ./flash.sh wp-disable | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Disabling WP protection ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (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 "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Failed to apply new WP settings: unexpected WP configuration read back from chip | ||
| Note: hardware status register protection is enabled. The chip's WP# pin must be set to an inactive voltage level to be able to change the WP settings. | ||
| Clearing WP region ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (armv7l) | ||
| flashrom is free software, get the source code at https://flashrom.org | ||
|
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||
| Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). | ||
| Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Failed to apply new WP settings: unexpected WP configuration read back from chip | ||
| Note: hardware status register protection is enabled. The chip's WP# pin must be set to an inactive voltage level to be able to change the WP settings. | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
| * The protection cannot be disabled by software as long as the WP pin is LOW | ||
| * Drive the WP pin HIGH: | ||
| ```shell | ||
| root@rte:~# ./flash.sh wp-high | ||
| Setting WP pin HIGH ... | ||
| ``` | ||
| * Set region `0,0` and disable protection (with WP pin HIGH already): | ||
| ```shell | ||
| root@rte:~# ./flash.sh wp-disable | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Disabling WP protection ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (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 "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Disabled hardware protection | ||
| Clearing WP region ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (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 "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Activated protection range: start=0x00000000 length=0x00000000 (none) | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
| * Check the `wp-status` again: | ||
| ```shell | ||
| root@rte:~# ./flash.sh wp-status | ||
| set SPI Vcc to 3.3V | ||
| SPI lines ON | ||
| SPI Vcc ON | ||
| Checking WP status ... | ||
| flashrom v1.2-880-gd047111 on Linux 5.4.69 (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 "MX25L6406E/MX25L6408E" (8192 kB, SPI) on linux_spi. | ||
| Protection range: start=0x00000000 length=0x00000000 (none) | ||
| Protection mode: disabled | ||
| SPI Vcc OFF | ||
| SPI lines OFF | ||
| ``` | ||
| * We can see that the `protection range` was set as desired | ||
| * We can see that the `protection mode` was changed to `disabled` |