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|
/*
* This software module makes it possible to use Open Sound System for Linux
* (the _professional_ version) as a low level driver source for ALSA.
*
* Copyright (C) 2004-2009 Hannu Savolainen (hannu@opensound.com).
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
/*
* !!!!!!!!!!!!!!!!!!!! Important !!!!!!!!!!!!!!!!!!
*
* If this file doesn't compile, you must not try to resolve the problem
* without perfect understanding of internals of Linux kernel, ALSA and
* Open Sound System.
*
* Instead you need to check that you are using the version of this file
* that matches the versions of ALSA, OSS and Linux you are currently using.
*/
#ifndef KBUILD_MODNAME
#define KBUILD_MODNAME cuckoo
#endif
#include "cuckoo.h"
#include "./checksum.h"
#ifdef VERMAGIC_STRING
static const char vermagic[] = VERMAGIC_STRING;
#endif
MODULE_AUTHOR ("Hannu Savolainen <hannu@opensound.com>");
MODULE_LICENSE ("GPL v2");
//MODULE_CLASSES("{sound}");
MODULE_DESCRIPTION ("OSS low level driver interface for ALSA");
#define CUCKOO_MAXCARD SNDRV_CARDS
static int index[CUCKOO_MAXCARD] = SNDRV_DEFAULT_IDX;
static char *id[CUCKOO_MAXCARD] = SNDRV_DEFAULT_STR;
static int enable[CUCKOO_MAXCARD] = SNDRV_DEFAULT_ENABLE_PNP;
static int
snd_cuckoo_free (cuckoo_t * chip)
{
// TODO
return 0;
}
static int
snd_cuckoo_dev_free (snd_device_t * device)
{
cuckoo_t *cuckoo = (cuckoo_t *) device->device_data;
return snd_cuckoo_free (cuckoo);
}
static int
snd_cuckoo_create (snd_card_t * card, int osscard, cuckoo_t ** rchip)
{
cuckoo_t *chip;
int err;
static snd_device_ops_t ops = {
.dev_free = snd_cuckoo_dev_free
};
*rchip = NULL;
if ((chip = (cuckoo_t *) kmalloc (sizeof (cuckoo_t), GFP_KERNEL)) == NULL)
return -ENOMEM;
chip->card = card;
chip->osscard = osscard;
chip->ncapture = chip->nplay = chip->npcm = 0;
if ((err = snd_device_new (card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
{
snd_cuckoo_free (chip);
return err;
}
*rchip = chip;
return 0;
}
static snd_card_t *cards[SNDRV_CARDS];
static int ncards = 0;
int
init_module (void)
{
int err;
int dev, cardno;
char tmp[100];
int pass;
#if 0
// TODO
if ((err = udi_connect (WRAPPER_VERSION)) < 0)
return err;
if (strcmp (oss_checksum, cuckoo_checksum) != 0)
{
printk
("cuckoo: Error OSS incompatibility problem. Please recompile.\n");
return -EIO;
}
#endif
for (pass = 0; pass < 2; pass++)
{
cardno = -1;
for (dev = 0; dev < num_audio_engines; dev++)
{
adev_p adev = audio_engines[dev];
cuckoo_t *chip;
snd_card_t *card = NULL;
if (pass == 0)
{
// Ignore non-virtual devices
if (!(adev->flags & ADEV_VIRTUAL))
continue;
}
else
{
// Ignore virtual devices
if ((adev->flags & ADEV_VIRTUAL))
continue;
}
if (adev->card_number < 0)
{
printk ("cuckoo: Ignored audio device %d - %s\n", dev,
adev->name);
continue;
}
if (adev->card_number != cardno)
{
oss_card_info cd;
cardno = adev->card_number;
if (oss_get_cardinfo (cardno, &cd) < 0)
{
printk ("oss_get_cardinfo(%d) failed\n", cardno);
continue;
}
// printk("Card %d: %s/%s\n", cardno, cd.shortname, cd.longname);
printk ("Card %d: %s/%s\n", cardno, cd.shortname, cd.longname);
if (ncards >= CUCKOO_MAXCARD)
{
printk
("Cuckoo: Too many audio devices (%d), only %d supported. by ALSA.\n",
num_audio_engines, CUCKOO_MAXCARD);
return -EIO;
}
if (!enable[ncards])
{
printk ("cuckoo: Device was not enabled (yet)\n");
return -EIO;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
if ((card =
snd_card_new (index[ncards], id[ncards], THIS_MODULE,
0)) == NULL)
#else
if (
snd_card_create (index[ncards], id[ncards], THIS_MODULE,
0, &card) != 0)
#endif
{
printk ("cuckoo: Can't create a card instance\n");
return -EIO;
}
if ((err = snd_cuckoo_create (card, cardno, &chip)) < 0)
{
printk ("cuckoo: Couldn't create a chip instance (%d)\n",
err);
snd_card_free (card);
return err;
}
#define oss_version_string "v4.x" // TODO
sprintf (tmp, "OSS %s", oss_version_string);
strlcpy (card->driver, tmp);
strlcpy (card->shortname, cd.shortname);
strlcpy (card->longname, cd.longname);
if ((err = install_pcm_instances (chip, cardno)) < 0)
return err;
if ((err = install_mixer_instances (chip, cardno)) < 0)
return err;
// if ((err=install_midiport_instances(chip, cardno))<0)
// return err;
if ((err = snd_card_register (card)) < 0)
{
printk ("cuckoo: Couldn't register card(%s) err=%d\n",
card->shortname, err);
continue; // TODO: Should handle this in more intelligent way
snd_card_free (card);
return err;
}
cards[ncards++] = card;
}
}
}
return 0;
}
void
cleanup_module (void)
{
int i;
for (i = 0; i < ncards; i++)
snd_card_free (cards[i]);
}
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,5))
#undef unix
struct module __this_module
__attribute__ ((section (".gnu.linkonce.this_module"))) =
{
.name = __stringify (KBUILD_MODNAME),.init = init_module,
#ifdef CONFIG_MODULE_UNLOAD
.exit = cleanup_module
#endif
};
#endif
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