• Lada Trimasova's avatar
    net: ezchip: adapt driver to little endian architecture · b54b8c2d
    Lada Trimasova authored
    Since ezchip network driver is written with big endian EZChip platform it
    is necessary to add support for little endian architecture.
    
    The first issue is that the order of the bits in a bit field is
    implementation specific. So all the bit fields are removed.
    Named constants are used to access necessary fields.
    
    And the second one is that network byte order is big endian.
    For example, data on ethernet is transmitted with most-significant
    octet (byte) first. So in case of little endian architecture
    it is important to swap data byte order when we read it from
    register. In case of unaligned access we can use "get_unaligned_be32"
    and in other case we can use function "ioread32_rep" which reads all
    data from register and works either with little endian or big endian
    architecture.
    
    And then when we are going to write data to register we need to restore
    byte order using the function "put_unaligned_be32" in case of
    unaligned access and in other case "iowrite32_rep".
    
    The last little fix is a space between type and pointer to observe
    coding style.
    Signed-off-by: default avatarLada Trimasova <ltrimas@synopsys.com>
    Cc: Alexey Brodkin <abrodkin@synopsys.com>
    Cc: Noam Camus <noamc@ezchip.com>
    Cc: Tal Zilcer <talz@ezchip.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    b54b8c2d
nps_enet.h 6.54 KB