ad1848.c

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/*
 *  Generic driver for AD1848/AD1847/CS4248 chips (0.1 Alpha)
 *  Copyright (c) by Tugrul Galatali <[email protected]>,
 *                   Jaroslav Kysela <[email protected]>
 *  Based on card-4232.c by Jaroslav Kysela <[email protected]>
 *
 *
 *   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 <linux/init.h>
#include <linux/err.h>
#include <linux/isa.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/wss.h>
#include <sound/initval.h>

#define CRD_NAME "Generic AD1848/AD1847/CS4248"
#define DEV_NAME "ad1848"

MODULE_DESCRIPTION(CRD_NAME);
MODULE_AUTHOR("Tugrul Galatali <[email protected]>, Jaroslav Kysela <[email protected]>");
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 bool 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 bool thinkpad[SNDRV_CARDS];          /* Thinkpad special case */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
module_param_array(dma1, int, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 # for " CRD_NAME " 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 int __devinit snd_ad1848_match(struct device *dev, unsigned int n)
{
    if (!enable[n])
        return 0;

    if (port[n] == SNDRV_AUTO_PORT) {
        dev_err(dev, "please specify port\n");
        return 0;
    }
    if (irq[n] == SNDRV_AUTO_IRQ) {
        dev_err(dev, "please specify irq\n");
        return 0;   
    }
    if (dma1[n] == SNDRV_AUTO_DMA) {
        dev_err(dev, "please specify dma1\n");
        return 0;
    }
    return 1;
}

static int __devinit snd_ad1848_probe(struct device *dev, unsigned int n)
{
    struct snd_card *card;
    struct snd_wss *chip;
    struct snd_pcm *pcm;
    int error;

    error = snd_card_create(index[n], id[n], THIS_MODULE, 0, &card);
    if (error < 0)
        return error;

    error = snd_wss_create(card, port[n], -1, irq[n], dma1[n], -1,
            thinkpad[n] ? WSS_HW_THINKPAD : WSS_HW_DETECT,
            0, &chip);
    if (error < 0)
        goto out;

    card->private_data = chip;

    error = snd_wss_pcm(chip, 0, &pcm);
    if (error < 0)
        goto out;

    error = snd_wss_mixer(chip);
    if (error < 0)
        goto out;

    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[n], dma1[n]);
    if (thinkpad[n])
        strcat(card->longname, " [Thinkpad]");

    snd_card_set_dev(card, dev);

    error = snd_card_register(card);
    if (error < 0)
        goto out;

    dev_set_drvdata(dev, card);
    return 0;

out:    snd_card_free(card);
    return error;
}

static int __devexit snd_ad1848_remove(struct device *dev, unsigned int n)
{
    snd_card_free(dev_get_drvdata(dev));
    dev_set_drvdata(dev, NULL);
    return 0;
}

#ifdef CONFIG_PM
static int snd_ad1848_suspend(struct device *dev, unsigned int n, pm_message_t state)
{
    struct snd_card *card = dev_get_drvdata(dev);
    struct snd_wss *chip = card->private_data;

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

static int snd_ad1848_resume(struct device *dev, unsigned int n)
{
    struct snd_card *card = dev_get_drvdata(dev);
    struct snd_wss *chip = card->private_data;

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

static struct isa_driver snd_ad1848_driver = {
    .match      = snd_ad1848_match,
    .probe      = snd_ad1848_probe,
    .remove     = __devexit_p(snd_ad1848_remove),
#ifdef CONFIG_PM
    .suspend    = snd_ad1848_suspend,
    .resume     = snd_ad1848_resume,
#endif
    .driver     = {
        .name   = DEV_NAME
    }
};

static int __init alsa_card_ad1848_init(void)
{
    return isa_register_driver(&snd_ad1848_driver, SNDRV_CARDS);
}

static void __exit alsa_card_ad1848_exit(void)
{
    isa_unregister_driver(&snd_ad1848_driver);
}

module_init(alsa_card_ad1848_init);
module_exit(alsa_card_ad1848_exit);