sb8.c

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/*
 *  Driver for SoundBlaster 1.0/2.0/Pro soundcards and compatible
 *  Copyright (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/ioport.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/sb.h>
#include <sound/opl3.h>
#include <sound/initval.h>

MODULE_AUTHOR("Jaroslav Kysela <[email protected]>");
MODULE_DESCRIPTION("Sound Blaster 1.0/2.0/Pro");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Creative Labs,SB 1.0/SB 2.0/SB Pro}}");

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; /* 0x220,0x240,0x260 */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;    /* 5,7,9,10 */
static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;   /* 1,3 */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Sound Blaster soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for Sound Blaster soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Sound Blaster soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for SB8 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for SB8 driver.");
module_param_array(dma8, int, NULL, 0444);
MODULE_PARM_DESC(dma8, "8-bit DMA # for SB8 driver.");

struct snd_sb8 {
    struct resource *fm_res;    /* used to block FM i/o region for legacy cards */
    struct snd_sb *chip;
};

static irqreturn_t snd_sb8_interrupt(int irq, void *dev_id)
{
    struct snd_sb *chip = dev_id;

    if (chip->open & SB_OPEN_PCM) {
        return snd_sb8dsp_interrupt(chip);
    } else {
        return snd_sb8dsp_midi_interrupt(chip);
    }
}

static void snd_sb8_free(struct snd_card *card)
{
    struct snd_sb8 *acard = card->private_data;

    if (acard == NULL)
        return;
    release_and_free_resource(acard->fm_res);
}

static int __devinit snd_sb8_match(struct device *pdev, unsigned int dev)
{
    if (!enable[dev])
        return 0;
    if (irq[dev] == SNDRV_AUTO_IRQ) {
        dev_err(pdev, "please specify irq\n");
        return 0;
    }
    if (dma8[dev] == SNDRV_AUTO_DMA) {
        dev_err(pdev, "please specify dma8\n");
        return 0;
    }
    return 1;
}

static int __devinit snd_sb8_probe(struct device *pdev, unsigned int dev)
{
    struct snd_sb *chip;
    struct snd_card *card;
    struct snd_sb8 *acard;
    struct snd_opl3 *opl3;
    int err;

    err = snd_card_create(index[dev], id[dev], THIS_MODULE,
                  sizeof(struct snd_sb8), &card);
    if (err < 0)
        return err;
    acard = card->private_data;
    card->private_free = snd_sb8_free;

    /* block the 0x388 port to avoid PnP conflicts */
    acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");

    if (port[dev] != SNDRV_AUTO_PORT) {
        if ((err = snd_sbdsp_create(card, port[dev], irq[dev],
                        snd_sb8_interrupt,
                        dma8[dev],
                        -1,
                        SB_HW_AUTO,
                        &chip)) < 0)
            goto _err;
    } else {
        /* auto-probe legacy ports */
        static unsigned long possible_ports[] = {
            0x220, 0x240, 0x260,
        };
        int i;
        for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
            err = snd_sbdsp_create(card, possible_ports[i],
                           irq[dev],
                           snd_sb8_interrupt,
                           dma8[dev],
                           -1,
                           SB_HW_AUTO,
                           &chip);
            if (err >= 0) {
                port[dev] = possible_ports[i];
                break;
            }
        }
        if (i >= ARRAY_SIZE(possible_ports)) {
            err = -EINVAL;
            goto _err;
        }
    }
    acard->chip = chip;
            
    if (chip->hardware >= SB_HW_16) {
        if (chip->hardware == SB_HW_ALS100)
            snd_printk(KERN_WARNING "ALS100 chip detected at 0x%lx, try snd-als100 module\n",
                    port[dev]);
        else
            snd_printk(KERN_WARNING "SB 16 chip detected at 0x%lx, try snd-sb16 module\n",
                   port[dev]);
        err = -ENODEV;
        goto _err;
    }

    if ((err = snd_sb8dsp_pcm(chip, 0, NULL)) < 0)
        goto _err;

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

    if (chip->hardware == SB_HW_10 || chip->hardware == SB_HW_20) {
        if ((err = snd_opl3_create(card, chip->port + 8, 0,
                       OPL3_HW_AUTO, 1,
                       &opl3)) < 0) {
            snd_printk(KERN_WARNING "sb8: no OPL device at 0x%lx\n", chip->port + 8);
        }
    } else {
        if ((err = snd_opl3_create(card, chip->port, chip->port + 2,
                       OPL3_HW_AUTO, 1,
                       &opl3)) < 0) {
            snd_printk(KERN_WARNING "sb8: no OPL device at 0x%lx-0x%lx\n",
                   chip->port, chip->port + 2);
        }
    }
    if (err >= 0) {
        if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0)
            goto _err;
    }

    if ((err = snd_sb8dsp_midi(chip, 0, NULL)) < 0)
        goto _err;

    strcpy(card->driver, chip->hardware == SB_HW_PRO ? "SB Pro" : "SB8");
    strcpy(card->shortname, chip->name);
    sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
        chip->name,
        chip->port,
        irq[dev], dma8[dev]);

    snd_card_set_dev(card, pdev);

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

    dev_set_drvdata(pdev, card);
    return 0;

 _err:
    snd_card_free(card);
    return err;
}

static int __devexit snd_sb8_remove(struct device *pdev, unsigned int dev)
{
    snd_card_free(dev_get_drvdata(pdev));
    dev_set_drvdata(pdev, NULL);
    return 0;
}

#ifdef CONFIG_PM
static int snd_sb8_suspend(struct device *dev, unsigned int n,
               pm_message_t state)
{
    struct snd_card *card = dev_get_drvdata(dev);
    struct snd_sb8 *acard = card->private_data;
    struct snd_sb *chip = acard->chip;

    snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
    snd_pcm_suspend_all(chip->pcm);
    snd_sbmixer_suspend(chip);
    return 0;
}

static int snd_sb8_resume(struct device *dev, unsigned int n)
{
    struct snd_card *card = dev_get_drvdata(dev);
    struct snd_sb8 *acard = card->private_data;
    struct snd_sb *chip = acard->chip;

    snd_sbdsp_reset(chip);
    snd_sbmixer_resume(chip);
    snd_power_change_state(card, SNDRV_CTL_POWER_D0);
    return 0;
}
#endif

#define DEV_NAME "sb8"

static struct isa_driver snd_sb8_driver = {
    .match      = snd_sb8_match,
    .probe      = snd_sb8_probe,
    .remove     = __devexit_p(snd_sb8_remove),
#ifdef CONFIG_PM
    .suspend    = snd_sb8_suspend,
    .resume     = snd_sb8_resume,
#endif
    .driver     = {
        .name   = DEV_NAME 
    },
};

static int __init alsa_card_sb8_init(void)
{
    return isa_register_driver(&snd_sb8_driver, SNDRV_CARDS);
}

static void __exit alsa_card_sb8_exit(void)
{
    isa_unregister_driver(&snd_sb8_driver);
}

module_init(alsa_card_sb8_init)
module_exit(alsa_card_sb8_exit)