{-|
  Module      : $Header$
  Copyright   : (c) 2014 Edward O'Callaghan
  License     : LGPL-2.1
  Maintainer  : eocallaghan@alterapraxis.com
  Stability   : provisional
  Portability : portable

  This module deals with Gain control
-}

module LibBladeRF.Gain ( -- * set,get TxVGA2
                         bladeRFSetTXVGA2
                       , bladeRFGetTXVGA2
                       -- * set,get TxVGA1
                       , bladeRFSetTXVGA1
                       , bladeRFGetTXVGA1
                       -- * set,get RxVGA2
                       , bladeRFSetRXVGA2
                       , bladeRFGetRXVGA2
                       -- * set,get RxVGA1
                       , bladeRFSetRXVGA1
                       , bladeRFGetRXVGA1
                       -- * set,gain LNA Gain
                       , bladeRFSetLNAGain
                       , bladeRFGetLNAGain
                       -- * Optimal gain control
-- XXX symb not found!!!
--                       , bladeRFSetTXGain
                       , bladeRFSetGain
                       ) where

import Foreign
import Foreign.C.Types
import Foreign.C.String

import Bindings.LibBladeRF
import LibBladeRF.LibBladeRF
import LibBladeRF.Types


-- | Set the PA gain in dB
bladeRFSetTXVGA2 :: DeviceHandle -- ^ Device handle
                 -> Int          -- ^ Desired gain
                 -> IO ()
bladeRFSetTXVGA2 dev g = do
  c'bladerf_set_txvga2 (unDeviceHandle dev) (fromIntegral g)
  return () -- ignores ret

-- | Get the PA gain in dB
bladeRFGetTXVGA2 :: DeviceHandle -- ^ Device handle
                 -> IO Int       -- ^ Returned gain
bladeRFGetTXVGA2 dev = do
  p <- malloc :: IO (Ptr CInt)
  c'bladerf_get_txvga2 (unDeviceHandle dev) p
  g <-  peek p
  free p
  return $ fromIntegral g

-- | Set the post-LPF gain in dB
bladeRFSetTXVGA1 :: DeviceHandle         -- ^ Device handle
                 -> BladeRFVGAGainBounds -- ^ Desired gain
                 -> IO ()
bladeRFSetTXVGA1 dev g = do
  c'bladerf_set_txvga1 (unDeviceHandle dev) ((fromIntegral . fromEnum) g)
  return () -- ignores ret

-- | Get the post-LPF gain in dB
bladeRFGetTXVGA1 :: DeviceHandle -- ^ Device handle
                 -> IO Int       -- ^ Returned gain
bladeRFGetTXVGA1 dev = do
  p <- malloc :: IO (Ptr CInt)
  c'bladerf_get_txvga1 (unDeviceHandle dev) p
  g <-  peek p
  free p
  return $ fromIntegral g

-- | Set the post-LPF VGA gain
bladeRFSetRXVGA2 :: DeviceHandle         -- ^ Device handle
                 -> BladeRFVGAGainBounds -- ^ Desired gain
                 -> IO ()
bladeRFSetRXVGA2 dev g = do
  c'bladerf_set_rxvga2 (unDeviceHandle dev) ((fromIntegral . fromEnum) g)
  return () -- ignores ret

-- | Get the post-LPF VGA gain
bladeRFGetRXVGA2 :: DeviceHandle -- ^ Device handle
                 -> IO Int       -- ^ Returned set gain level
bladeRFGetRXVGA2 dev = do
  p <- malloc :: IO (Ptr CInt)
  c'bladerf_get_rxvga2 (unDeviceHandle dev) p
  g <-  peek p
  free p
  return $ fromIntegral g

-- | Set the pre-LPF VGA gain
bladeRFSetRXVGA1 :: DeviceHandle         -- ^ Device handle
                 -> BladeRFVGAGainBounds -- ^ Desired gain
                 -> IO ()
bladeRFSetRXVGA1 dev g = do
  c'bladerf_set_rxvga1 (unDeviceHandle dev) ((fromIntegral . fromEnum) g)
  return () -- ignores ret

-- | Get the pre-LPF VGA gain
bladeRFGetRXVGA1 :: DeviceHandle -- ^ Device handle
                 -> IO Int       -- ^ Returned set gain level
bladeRFGetRXVGA1 dev = do
  p <- malloc :: IO (Ptr CInt)
  c'bladerf_get_rxvga1 (unDeviceHandle dev) p
  g <-  peek p
  free p
  return $ fromIntegral g

-- | Set LNA Gain
bladeRFSetLNAGain :: DeviceHandle   -- ^ Device handle
                  -> BladeRFLNAGain -- ^ Desired gain level
                  -> IO ()
bladeRFSetLNAGain dev g = do
  c'bladerf_set_lna_gain (unDeviceHandle dev) ((fromIntegral . fromEnum) g)
  return () -- ignores ret

-- | Get LNA Gain
bladeRFGetLNAGain :: DeviceHandle      -- ^ Device handle
                  -> IO BladeRFLNAGain -- ^ Returned set gain level
bladeRFGetLNAGain dev = do
  p <- malloc :: IO (Ptr C'bladerf_lna_gain)
  c'bladerf_get_lna_gain (unDeviceHandle dev) p
  g <-  peek p
  free p
  return $ (toEnum . fromIntegral) g

--
-- | Set a combined VGA TX gain
--   This function computes the optimal TXVGA1 and TXVGA2 gains for a requested
--   amount of gain
-- XXX symb not found!!!
--bladeRFSetTXGain :: DeviceHandle -> Int -> IO ()
--bladeRFSetTXGain dev g = do
--  c'bladerf_set_tx_gain (unDeviceHandle dev) (fromIntegral g)
--  return () -- ignores ret

-- | Set a combined pre and post LPF RX gain
--   This function computes the optimal LNA, RXVGA1, and RVGA2 gains for a
--   requested amount of RX gain, and computes the optimal TXVGA1 and TXVGA2 gains
--   for a requested amount of TX gain
bladeRFSetGain :: DeviceHandle  -- ^ Device handle
               -> BladeRFModule -- ^ Module
               -> Int           -- ^ Desired gain
               -> IO ()
bladeRFSetGain dev m g = do
  c'bladerf_set_gain (unDeviceHandle dev) ((fromIntegral . fromEnum) m) (fromIntegral g)
  return () -- ignores ret