HAL_CAP_TXPOW
case HAL_CAP_TXPOW: /* global tx power limit */
case HAL_CAP_TXPOW:
(ath_hal_getcapability(_ah, HAL_CAP_TXPOW, 0, NULL) == HAL_OK)
(ath_hal_getcapability(_ah, HAL_CAP_TXPOW, 1, _ppow) == HAL_OK)
(ath_hal_getcapability(_ah, HAL_CAP_TXPOW, 2, _ppow) == HAL_OK)
(ath_hal_getcapability(_ah, HAL_CAP_TXPOW, 3, _scale) == HAL_OK)
ath_hal_setcapability(_ah, HAL_CAP_TXPOW, 3, _v, NULL)