drivers/staging/comedi/drivers/ni_labpc_isadma.h

   1 /*
   2  * ni_labpc ISA DMA support.
   3 */
   4
   5 #ifndef _NI_LABPC_ISADMA_H
   6 #define _NI_LABPC_ISADMA_H
   7
   8 #define NI_LABPC_HAVE_ISA_DMA   IS_ENABLED(CONFIG_COMEDI_NI_LABPC_ISADMA)
   9
  10 #if NI_LABPC_HAVE_ISA_DMA
  11
  12 static inline bool labpc_have_dma_chan(struct comedi_device *dev)
  13 {
  14         struct labpc_private *devpriv = dev->private;
  15
  16         return (bool)devpriv->dma_chan;
  17 }
  18
  19 int labpc_init_dma_chan(struct comedi_device *dev, unsigned int dma_chan);
  20 void labpc_free_dma_chan(struct comedi_device *dev);
  21 void labpc_setup_dma(struct comedi_device *dev, struct comedi_subdevice *s);
  22 void labpc_drain_dma(struct comedi_device *dev);
  23 void labpc_handle_dma_status(struct comedi_device *dev);
  24
  25 #else
  26
  27 static inline bool labpc_have_dma_chan(struct comedi_device *dev)
  28 {
  29         return false;
  30 }
  31
  32 static inline int labpc_init_dma_chan(struct comedi_device *dev,
  33                                       unsigned int dma_chan)
  34 {
  35         return -ENOTSUPP;
  36 }
  37
  38 static inline void labpc_free_dma_chan(struct comedi_device *dev)
  39 {
  40 }
  41
  42 static inline void labpc_setup_dma(struct comedi_device *dev,
  43                                    struct comedi_subdevice *s)
  44 {
  45 }
  46
  47 static inline void labpc_drain_dma(struct comedi_device *dev)
  48 {
  49 }
  50
  51 static inline void labpc_handle_dma_status(struct comedi_device *dev)
  52 {
  53 }
  54
  55 #endif
  56
  57 #endif /* _NI_LABPC_ISADMA_H */