• Ido Yariv's avatar
    wl12xx: Support routing FW logs to the host · 95dac04f
    Ido Yariv authored
    A recently added feature to the firmware enables the driver to retrieve
    firmware logs via the host bus (SDIO or SPI).
    
    There are two modes of operation:
    1. On-demand: The FW collects its log in an internal ring buffer. This
       buffer can later be read, for example, upon recovery.
    2. Continuous: The FW pushes the FW logs as special packets in the RX
       path.
    
    Reading the internal ring buffer does not involve the FW. Thus, as long
    as the HW is not in ELP, it should be possible to read the logs, even if
    the FW crashes.
    
    A sysfs binary file named "fwlog" was added to support this feature,
    letting a monitor process read the FW messages. The log is transferred
    from the FW only when available, so the reading process might block.
    Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
    Signed-off-by: default avatarLuciano Coelho <coelho@ti.com>
    95dac04f
rx.c 7.5 KB