pdaudiocf.c

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/*
 * Driver for Sound Core PDAudioCF soundcard
 *
 * Copyright (c) 2003 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 <sound/core.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/cisreg.h>
#include "pdaudiocf.h"
#include <sound/initval.h>
#include <linux/init.h>

/*
 */

#define CARD_NAME   "PDAudio-CF"

MODULE_AUTHOR("Jaroslav Kysela <[email protected]>");
MODULE_DESCRIPTION("Sound Core " CARD_NAME);
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Sound Core," CARD_NAME "}}");

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_PNP; /* Enable switches */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");

/*
 */

static struct snd_card *card_list[SNDRV_CARDS];

/*
 * prototypes
 */
static int pdacf_config(struct pcmcia_device *link);
static void snd_pdacf_detach(struct pcmcia_device *p_dev);

static void pdacf_release(struct pcmcia_device *link)
{
    pcmcia_disable_device(link);
}

/*
 * destructor
 */
static int snd_pdacf_free(struct snd_pdacf *pdacf)
{
    struct pcmcia_device *link = pdacf->p_dev;

    pdacf_release(link);

    card_list[pdacf->index] = NULL;
    pdacf->card = NULL;

    kfree(pdacf);
    return 0;
}

static int snd_pdacf_dev_free(struct snd_device *device)
{
    struct snd_pdacf *chip = device->device_data;
    return snd_pdacf_free(chip);
}

/*
 * snd_pdacf_attach - attach callback for cs
 */
static int snd_pdacf_probe(struct pcmcia_device *link)
{
    int i, err;
    struct snd_pdacf *pdacf;
    struct snd_card *card;
    static struct snd_device_ops ops = {
        .dev_free = snd_pdacf_dev_free,
    };

    snd_printdd(KERN_DEBUG "pdacf_attach called\n");
    /* find an empty slot from the card list */
    for (i = 0; i < SNDRV_CARDS; i++) {
        if (! card_list[i])
            break;
    }
    if (i >= SNDRV_CARDS) {
        snd_printk(KERN_ERR "pdacf: too many cards found\n");
        return -EINVAL;
    }
    if (! enable[i])
        return -ENODEV; /* disabled explicitly */

    /* ok, create a card instance */
    err = snd_card_create(index[i], id[i], THIS_MODULE, 0, &card);
    if (err < 0) {
        snd_printk(KERN_ERR "pdacf: cannot create a card instance\n");
        return err;
    }

    pdacf = snd_pdacf_create(card);
    if (!pdacf) {
        snd_card_free(card);
        return -ENOMEM;
    }

    err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pdacf, &ops);
    if (err < 0) {
        kfree(pdacf);
        snd_card_free(card);
        return err;
    }

    snd_card_set_dev(card, &link->dev);

    pdacf->index = i;
    card_list[i] = card;

    pdacf->p_dev = link;
    link->priv = pdacf;

    link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
    link->resource[0]->end = 16;

    link->config_flags = CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
    link->config_index = 1;
    link->config_regs = PRESENT_OPTION;

    return pdacf_config(link);
}


static int snd_pdacf_assign_resources(struct snd_pdacf *pdacf, int port, int irq)
{
    int err;
    struct snd_card *card = pdacf->card;

    snd_printdd(KERN_DEBUG "pdacf assign resources: port = 0x%x, irq = %d\n", port, irq);
    pdacf->port = port;
    pdacf->irq = irq;
    pdacf->chip_status |= PDAUDIOCF_STAT_IS_CONFIGURED;

    err = snd_pdacf_ak4117_create(pdacf);
    if (err < 0)
        return err; 

    strcpy(card->driver, "PDAudio-CF");
    sprintf(card->shortname, "Core Sound %s", card->driver);
    sprintf(card->longname, "%s at 0x%x, irq %i",
        card->shortname, port, irq);

    err = snd_pdacf_pcm_new(pdacf);
    if (err < 0)
        return err;

    if ((err = snd_card_register(card)) < 0)
        return err;

    return 0;
}


/*
 * snd_pdacf_detach - detach callback for cs
 */
static void snd_pdacf_detach(struct pcmcia_device *link)
{
    struct snd_pdacf *chip = link->priv;

    snd_printdd(KERN_DEBUG "pdacf_detach called\n");

    if (chip->chip_status & PDAUDIOCF_STAT_IS_CONFIGURED)
        snd_pdacf_powerdown(chip);
    chip->chip_status |= PDAUDIOCF_STAT_IS_STALE; /* to be sure */
    snd_card_disconnect(chip->card);
    snd_card_free_when_closed(chip->card);
}

/*
 * configuration callback
 */

static int pdacf_config(struct pcmcia_device *link)
{
    struct snd_pdacf *pdacf = link->priv;
    int ret;

    snd_printdd(KERN_DEBUG "pdacf_config called\n");
    link->config_index = 0x5;
    link->config_flags |= CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;

    ret = pcmcia_request_io(link);
    if (ret)
        goto failed;

    ret = pcmcia_request_irq(link, pdacf_interrupt);
    if (ret)
        goto failed;

    ret = pcmcia_enable_device(link);
    if (ret)
        goto failed;

    if (snd_pdacf_assign_resources(pdacf, link->resource[0]->start,
                    link->irq) < 0)
        goto failed;

    return 0;

failed:
    pcmcia_disable_device(link);
    return -ENODEV;
}

#ifdef CONFIG_PM

static int pdacf_suspend(struct pcmcia_device *link)
{
    struct snd_pdacf *chip = link->priv;

    snd_printdd(KERN_DEBUG "SUSPEND\n");
    if (chip) {
        snd_printdd(KERN_DEBUG "snd_pdacf_suspend calling\n");
        snd_pdacf_suspend(chip);
    }

    return 0;
}

static int pdacf_resume(struct pcmcia_device *link)
{
    struct snd_pdacf *chip = link->priv;

    snd_printdd(KERN_DEBUG "RESUME\n");
    if (pcmcia_dev_present(link)) {
        if (chip) {
            snd_printdd(KERN_DEBUG "calling snd_pdacf_resume\n");
            snd_pdacf_resume(chip);
        }
    }
    snd_printdd(KERN_DEBUG "resume done!\n");

    return 0;
}

#endif

/*
 * Module entry points
 */
static const struct pcmcia_device_id snd_pdacf_ids[] = {
    /* this is too general PCMCIA_DEVICE_MANF_CARD(0x015d, 0x4c45), */
    PCMCIA_DEVICE_PROD_ID12("Core Sound","PDAudio-CF",0x396d19d2,0x71717b49),
    PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, snd_pdacf_ids);

static struct pcmcia_driver pdacf_cs_driver = {
    .owner      = THIS_MODULE,
    .name       = "snd-pdaudiocf",
    .probe      = snd_pdacf_probe,
    .remove     = snd_pdacf_detach,
    .id_table   = snd_pdacf_ids,
#ifdef CONFIG_PM
    .suspend    = pdacf_suspend,
    .resume     = pdacf_resume,
#endif

};

static int __init init_pdacf(void)
{
    return pcmcia_register_driver(&pdacf_cs_driver);
}

static void __exit exit_pdacf(void)
{
    pcmcia_unregister_driver(&pdacf_cs_driver);
}

module_init(init_pdacf);
module_exit(exit_pdacf);