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Diffstat (limited to 'flashrom.8')
| -rw-r--r-- | flashrom.8 | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -303,6 +303,26 @@ is the I/O port number (must be a multiple of 8). In the unlikely case flashrom doesn't detect an active IT87 LPC<->SPI bridge, please send a bug report so we can diagnose the problem. .sp +If you have an Intel chipset with an ICH8 or later southbridge with SPI flash +attached, and if a valid descriptor was written to it (e.g. by the vendor), the +chipset provides an alternative way to access the flash chip(s) named +.BR "Hardware Sequencing" . +It is much simpler than the normal access method (called +.BR "Software Sequencing" ")," +but does not allow the software to choose the SPI commands to be sent. +You can use the +.sp +.B " flashrom \-p internal:ich_spi_mode=value" +.sp +syntax where value can be +.BR auto ", " swseq " or " hwseq . +By default +.RB "(or when setting " ich_spi_mode=auto ) +the module tries to use swseq and only activates hwseq if need be (e.g. if +important opcodes are inaccessible due to lockdown; or if more than one flash +chip is attached). The other options (swseq, hwseq) select the respective mode +(if possible). +.sp If you have an Intel chipset with an ICH6 or later southbridge and if you want to set specific IDSEL values for a non-default flash chip or an embedded controller (EC), you can use the |