92a9978b44
[spi] Add address-length autodetection to the SPI bit-bashing code
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Several SPI chips will respond to an SPI read command with a dummy
zero bit immediately prior to the first real data bit. This can be
used to autodetect the address length, provided that the command
length and data length are already known, and that the MISO data line
is tied high.
Tested-by: Thomas Miletich <thomas.miletich@gmail.com>
Debugged-by: Thomas Miletich <thomas.miletich@gmail.com>
2009-05-28 19:32:03 +01:00
c44a193d0d
[legal] Add a selection of FILE_LICENCE declarations
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Add FILE_LICENCE declarations to almost all files that make up the
various standard builds of gPXE.
2009-05-18 08:33:25 +01:00
4c75e9ded4
[nvs] Add support for ST M25P32 SPI flash devices
2008-06-27 14:39:25 -07:00
d62c83a350
Migrated etherfabric driver to using generic SPI layer.
2006-12-04 20:47:51 +00:00
1961ba44e1
Added generic SPI protocol handler with read and write support.
2006-12-04 18:32:55 +00:00
946967f09c
Abstracted out part of the concept of an SPI device to a generalised NVS
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device.
Separated the mechanisms of non-volatile storage access and non-volatile
stored options.
2006-12-04 18:23:06 +00:00
dc06c895fc
Changed length parameter in SPI methods to be a byte length, rather than
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a word length.
2006-12-04 16:09:59 +00:00
931f94dca3
Generalised the SPI abstraction layer to also be able to handle interfaces
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that don't provide the full flexibility of a bit-bashing interface.
Temporarily hacked rtl8139.c to use the new interface.
2006-12-04 15:36:51 +00:00
3b51c719d3
Generalise three-wire interface to generic SPI interface.
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Update rtl8139 driver to instantiate an SPI interface with a three-wire
device attached.
2006-06-14 00:22:50 +00:00
Michael Brown