release/src-rt-6.x/linux/linux-2.6/drivers/pnp/support.c

   1 /*
   2  * support.c - provides standard pnp functions for the use of pnp protocol drivers,
   3  *
   4  * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
   5  *
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/ctype.h>
  10 #include <linux/pnp.h>
  11 #include "base.h"
  12
  13 /**
  14  * pnp_is_active - Determines if a device is active based on its current resources
  15  * @dev: pointer to the desired PnP device
  16  *
  17  */
  18
  19 int pnp_is_active(struct pnp_dev * dev)
  20 {
  21         if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
  22             !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
  23             pnp_irq(dev, 0) == -1 &&
  24             pnp_dma(dev, 0) == -1)
  25                 return 0;
  26         else
  27                 return 1;
  28 }
  29
  30
  31
  32 EXPORT_SYMBOL(pnp_is_active);