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/config.h>
   9 #include <linux/module.h>
  10 #include <linux/ctype.h>
  11
  12 #ifdef CONFIG_PNP_DEBUG
  13         #define DEBUG
  14 #else
  15         #undef DEBUG
  16 #endif
  17
  18 #include <linux/pnp.h>
  19 #include "base.h"
  20
  21 /**
  22  * pnp_is_active - Determines if a device is active based on its current resources
  23  * @dev: pointer to the desired PnP device
  24  *
  25  */
  26
  27 int pnp_is_active(struct pnp_dev * dev)
  28 {
  29         if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
  30             !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
  31             pnp_irq(dev, 0) == -1 &&
  32             pnp_dma(dev, 0) == -1)
  33                 return 0;
  34         else
  35                 return 1;
  36 }
  37
  38
  39
  40 EXPORT_SYMBOL(pnp_is_active);