bwfm_sdio_dev_read
uint32_t bwfm_sdio_dev_read(struct bwfm_sdio_softc *, uint32_t);
intstat = bwfm_sdio_dev_read(sc, BWFM_SDPCMD_INTSTATUS);
hostint = bwfm_sdio_dev_read(sc, SDPCMD_TOHOSTMAILBOXDATA);