FH_TCSR_CHNL_TX_CONFIG_REG
iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
iwl_write_direct32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);