drivers/pnp/support.c

   1 /*
   2  * support.c - standard functions for the use of pnp protocol drivers
   3  *
   4  * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/ctype.h>
   9 #include <linux/pnp.h>
  10 #include "base.h"
  11
  12 /**
  13  * pnp_is_active - Determines if a device is active based on its current
  14  *      resources
  15  * @dev: pointer to the desired PnP device
  16  */
  17 int pnp_is_active(struct pnp_dev *dev)
  18 {
  19         if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
  20             !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
  21             pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
  22                 return 0;
  23         else
  24                 return 1;
  25 }
  26
  27 EXPORT_SYMBOL(pnp_is_active);