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Sourcecode: alsa-driver version File versions

isapnp_quirks.c

/*
 *  This file contains quirk handling code for ISAPnP devices
 *  Some devices do not report all their resources, and need to have extra
 *  resources added. This is most easily accomplished at initialisation time
 *  when building up the resource structure for the first time.
 *
 *  Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
 *
 *  Heavily based on PCI quirks handling which is
 *
 *  Copyright (c) 1999 Martin Mares <mj@suse.cz>
 *
 *  2-20-2000 Added Soundblaster 16 audio device port range quirk.
 *    Paul Laufer <pelaufer@csupomona.edu>
 */

#ifdef ALSA_BUILD
#define CONFIG_ISAPNP
#endif

#define __NO_VERSION__

#include <linux/config.h>
#include <linux/module.h>

#ifdef ALSA_BUILD
#if defined(CONFIG_MODVERSIONS) && !defined(__GENKSYMS__) && !defined(__DEPEND__)
#include "sndversions.h"
#endif
#endif

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/string.h>
#include "isapnp.h"

extern void *isapnp_alloc(long len);

static void quirk_awe32_resources(struct isapnp_dev *dev)
{
      struct isapnp_port *port, *port2, *port3;
      struct isapnp_resources *res = dev->sysdata;

      /*
       * Unfortunately the isapnp_add_port_resource is too tightly bound
       * into the PnP discovery sequence, and cannot be used. Link in the
       * two extra ports (at offset 0x400 and 0x800 from the one given) by
       * hand.
       */
      for ( ; res ; res = res->alt ) {
            port2 = isapnp_alloc(sizeof(struct isapnp_port));
            port3 = isapnp_alloc(sizeof(struct isapnp_port));
            if (!port2 || !port3)
                  return;
            port = res->port;
            *port2 = *port;
            *port3 = *port;
            port->next = port2;
            port2->next = port3;
            port2->min += 0x400;
            port2->max += 0x400;
            port3->min += 0x800;
            port3->max += 0x800;
      }
#ifndef MODULE
      printk(KERN_INFO "ISAPnP: AWE32 quirk - adding two ports\n");
#endif
}


static void __init quirk_sb16audio_resources(struct isapnp_dev *dev)
{
      struct isapnp_port *port, *port2, *port3;
      struct isapnp_resources *res = dev->sysdata;

      /* 
       * The default range on the 3rd port for these devices is 0x388-0x388.
       * That is bad. This little quirk should make it all better . . .
       */
      
      for( ; res ; res = res->alt ) {
            port = res->port;
            if(!port)
                  continue;
            port2 = port->next;
            if(!port2)
                  continue;
            port3 = port2->next;
            if(!port3)
                  continue;
            if(port3->min != port3->max)
                  continue;
            port3->max += 0x70;
      }
#ifndef MODULE
      printk(KERN_INFO "ISAPnP: SB audio device quirk - increasing port range\n");
#endif
}


/*
 *  ISAPnP Quirks
 *  Cards or devices that need some tweaking due to broken hardware
 */

static struct isapnp_fixup isapnp_fixups[] __initdata = {
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0021),
            quirk_awe32_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0022),
            quirk_awe32_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0023),
            quirk_awe32_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0031),
            quirk_sb16audio_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0001),
            quirk_sb16audio_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0041),
            quirk_sb16audio_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0042),
            quirk_sb16audio_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0043),
            quirk_sb16audio_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0044),
            quirk_sb16audio_resources },
      { ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x0045),
            quirk_sb16audio_resources },
      { 0 }
};

void isapnp_fixup_device(struct isapnp_dev *dev)
{
      int i = 0;

      while (isapnp_fixups[i].vendor != 0) {
            if ((isapnp_fixups[i].vendor == dev->vendor) &&
                (isapnp_fixups[i].device == dev->device)) {
                  printk(KERN_DEBUG "PnP: Calling quirk for %02x:%02x\n",
                         dev->bus->number, dev->devfn);
                  isapnp_fixups[i].quirk_function(dev);
            }
            i++;
      }
}

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