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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/err.h>
#include <linux/platform_device.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 struct platform_device *devices[SNDRV_CARDS];


static int __init snd_ad1848_probe(struct platform_device *pdev)
{
      int dev = pdev->id;
      struct snd_card *card;
      struct snd_ad1848 *chip;
      struct snd_pcm *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;
      card->private_data = chip;

      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]");

      snd_card_set_dev(card, &pdev->dev);

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

      platform_set_drvdata(pdev, card);
      return 0;

 _err:
      snd_card_free(card);
      return err;
}

static int __devexit snd_ad1848_remove(struct platform_device *devptr)
{
      snd_card_free(platform_get_drvdata(devptr));
      platform_set_drvdata(devptr, NULL);
      return 0;
}

#ifdef CONFIG_PM
static int snd_ad1848_suspend(struct platform_device *pdev, pm_message_t state)
{
      struct snd_card *card = platform_get_drvdata(pdev);
      struct snd_ad1848 *chip = card->private_data;

      snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
      chip->suspend(chip);
      return 0;
}

static int snd_ad1848_resume(struct platform_device *pdev)
{
      struct snd_card *card = platform_get_drvdata(pdev);
      struct snd_ad1848 *chip = card->private_data;

      chip->resume(chip);
      snd_power_change_state(card, SNDRV_CTL_POWER_D0);
      return 0;
}
#endif

#define SND_AD1848_DRIVER     "snd_ad1848"

static struct platform_driver snd_ad1848_driver = {
      .probe            = snd_ad1848_probe,
      .remove           = __devexit_p(snd_ad1848_remove),
#ifdef CONFIG_PM
      .suspend    = snd_ad1848_suspend,
      .resume           = snd_ad1848_resume,
#endif
      .driver           = {
            .name = SND_AD1848_DRIVER
      },
};

static void __init_or_module snd_ad1848_unregister_all(void)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(devices); ++i)
            platform_device_unregister(devices[i]);
      platform_driver_unregister(&snd_ad1848_driver);
}

static int __init alsa_card_ad1848_init(void)
{
      int i, cards, err;

      err = platform_driver_register(&snd_ad1848_driver);
      if (err < 0)
            return err;

      cards = 0;
      for (i = 0; i < SNDRV_CARDS; i++) {
            struct platform_device *device;
            if (! enable[i])
                  continue;
            device = platform_device_register_simple(SND_AD1848_DRIVER,
                                           i, NULL, 0);
            if (IS_ERR(device))
                  continue;
            if (!platform_get_drvdata(device)) {
                  platform_device_unregister(device);
                  continue;
            }
            devices[i] = device;
            cards++;
      }
      if (!cards) {
#ifdef MODULE
            printk(KERN_ERR "AD1848 soundcard not found or device busy\n");
#endif
            snd_ad1848_unregister_all();
            return -ENODEV;
      }
      return 0;
}

static void __exit alsa_card_ad1848_exit(void)
{
      snd_ad1848_unregister_all();
}

module_init(alsa_card_ad1848_init)
module_exit(alsa_card_ad1848_exit)

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