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ad1848.c

/*
 *  Generic driver for AD1848/AD1847/CS4248 chips (0.1 Alpha)
 *  Copyright (c) by Tugrul Galatali <galatalt@stuy.edu>,
 *                   Jaroslav Kysela <perex@suse.cz>
 *  Based on card-4232.c by Jaroslav Kysela <perex@suse.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/driver.h>
#include <linux/init.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/ad1848.h>
#include <sound/initval.h>

MODULE_AUTHOR("Tugrul Galatali <galatalt@stuy.edu>, Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("AD1848/AD1847/CS4248");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1848},"
              "{Analog Devices,AD1847},"
            "{Crystal Semiconductors,CS4248}}");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;    /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;     /* ID for this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;      /* Enable this card */
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;   /* PnP setup */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;      /* 5,7,9,11,12,15 */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;     /* 0,1,3,5,6,7 */
static int thinkpad[SNDRV_CARDS];               /* Thinkpad special case */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for AD1848 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for AD1848 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable AD1848 soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for AD1848 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for AD1848 driver.");
module_param_array(dma1, int, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 # for AD1848 driver.");
module_param_array(thinkpad, bool, NULL, 0444);
MODULE_PARM_DESC(thinkpad, "Enable only for the onboard CS4248 of IBM Thinkpad 360/750/755 series.");

static snd_card_t *snd_ad1848_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;


static int __init snd_card_ad1848_probe(int dev)
{
      snd_card_t *card;
      ad1848_t *chip;
      snd_pcm_t *pcm;
      int err;

      if (port[dev] == SNDRV_AUTO_PORT) {
            snd_printk(KERN_ERR "ad1848: specify port\n");
            return -EINVAL;
      }
      if (irq[dev] == SNDRV_AUTO_IRQ) {
            snd_printk(KERN_ERR "ad1848: specify irq\n");
            return -EINVAL;
      }
      if (dma1[dev] == SNDRV_AUTO_DMA) {
            snd_printk(KERN_ERR "ad1848: specify dma1\n");
            return -EINVAL;
      }

      card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
      if (card == NULL)
            return -ENOMEM;

      if ((err = snd_ad1848_create(card, port[dev],
                             irq[dev],
                             dma1[dev],
                             thinkpad[dev] ? AD1848_HW_THINKPAD : AD1848_HW_DETECT,
                             &chip)) < 0)
            goto _err;

      if ((err = snd_ad1848_pcm(chip, 0, &pcm)) < 0)
            goto _err;

      if ((err = snd_ad1848_mixer(chip)) < 0)
            goto _err;

      strcpy(card->driver, "AD1848");
      strcpy(card->shortname, pcm->name);

      sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
            pcm->name, chip->port, irq[dev], dma1[dev]);

      if (thinkpad[dev])
            strcat(card->longname, " [Thinkpad]");

      if ((err = snd_card_set_generic_dev(card)) < 0)
            goto _err;

      if ((err = snd_card_register(card)) < 0)
            goto _err;

      snd_ad1848_cards[dev] = card;
      return 0;

 _err:
      snd_card_free(card);
      return err;
}

static int __init alsa_card_ad1848_init(void)
{
      int dev, cards;

      for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++)
            if (snd_card_ad1848_probe(dev) >= 0)
                  cards++;

      if (!cards) {
#ifdef MODULE
            printk(KERN_ERR "AD1848 soundcard not found or device busy\n");
#endif
            return -ENODEV;
      }
      return 0;
}

static void __exit alsa_card_ad1848_exit(void)
{
      int idx;

      for (idx = 0; idx < SNDRV_CARDS; idx++)
            snd_card_free(snd_ad1848_cards[idx]);
}

module_init(alsa_card_ad1848_init)
module_exit(alsa_card_ad1848_exit)

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