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es1688.c

/*
 *  Driver for generic ESS AudioDrive ESx688 soundcards
 *  Copyright (c) by Jaroslav Kysela <perex@perex.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 <linux/init.h>
#include <linux/err.h>
#include <linux/isa.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/moduleparam.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/es1688.h>
#include <sound/mpu401.h>
#include <sound/opl3.h>
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>

#define CRD_NAME "Generic ESS ES1688/ES688 AudioDrive"
#define DEV_NAME "es1688"

MODULE_DESCRIPTION(CRD_NAME);
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ESS,ES688 PnP AudioDrive,pnp:ESS0100},"
              "{ESS,ES1688 PnP AudioDrive,pnp:ESS0102},"
              "{ESS,ES688 AudioDrive,pnp:ESS6881},"
              "{ESS,ES1688 AudioDrive,pnp:ESS1681}}");

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;   /* 0x220,0x240,0x260 */
static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;      /* Usually 0x388 */
static long mpu_port[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;      /* 5,7,9,10 */
static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;  /* 5,7,9,10 */
static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;     /* 0,1,3 */

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(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for " CRD_NAME " driver.");
module_param_array(irq, int, NULL, 0444);
module_param_array(fm_port, long, NULL, 0444);
MODULE_PARM_DESC(fm_port, "FM port # for ES1688 driver.");
MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
module_param_array(mpu_irq, int, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for " CRD_NAME " driver.");
module_param_array(dma8, int, NULL, 0444);
MODULE_PARM_DESC(dma8, "8-bit DMA # for " CRD_NAME " driver.");

static int __devinit snd_es1688_match(struct device *dev, unsigned int n)
{
      return enable[n];
}

static int __devinit snd_es1688_legacy_create(struct snd_card *card, 
            struct device *dev, unsigned int n, struct snd_es1688 **rchip)
{
      static long possible_ports[] = {0x220, 0x240, 0x260};
      static int possible_irqs[] = {5, 9, 10, 7, -1};
      static int possible_dmas[] = {1, 3, 0, -1};

      int i, error;

      if (irq[n] == SNDRV_AUTO_IRQ) {
            irq[n] = snd_legacy_find_free_irq(possible_irqs);
            if (irq[n] < 0) {
                  dev_err(dev, "unable to find a free IRQ\n");
                  return -EBUSY;
            }
      }
      if (dma8[n] == SNDRV_AUTO_DMA) {
            dma8[n] = snd_legacy_find_free_dma(possible_dmas);
            if (dma8[n] < 0) {
                  dev_err(dev, "unable to find a free DMA\n");
                  return -EBUSY;
            }
      }

      if (port[n] != SNDRV_AUTO_PORT)
            return snd_es1688_create(card, port[n], mpu_port[n], irq[n],
                        mpu_irq[n], dma8[n], ES1688_HW_AUTO, rchip);

      i = 0;
      do {
            port[n] = possible_ports[i];
            error = snd_es1688_create(card, port[n], mpu_port[n], irq[n],
                        mpu_irq[n], dma8[n], ES1688_HW_AUTO, rchip);
      } while (error < 0 && ++i < ARRAY_SIZE(possible_ports));

      return error;
}

static int __devinit snd_es1688_probe(struct device *dev, unsigned int n)
{
      struct snd_card *card;
      struct snd_es1688 *chip;
      struct snd_opl3 *opl3;
      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_es1688_legacy_create(card, dev, n, &chip);
      if (error < 0)
            goto out;

      error = snd_es1688_pcm(chip, 0, &pcm);
      if (error < 0)
            goto out;

      error = snd_es1688_mixer(chip);
      if (error < 0)
            goto out;

      strcpy(card->driver, "ES1688");
      strcpy(card->shortname, pcm->name);
      sprintf(card->longname, "%s at 0x%lx, irq %i, dma %i", pcm->name,
            chip->port, chip->irq, chip->dma8);

      if (fm_port[n] == SNDRV_AUTO_PORT)
            fm_port[n] = port[n];   /* share the same port */

      if (fm_port[n] > 0) {
            if (snd_opl3_create(card, fm_port[n], fm_port[n] + 2,
                        OPL3_HW_OPL3, 0, &opl3) < 0)
                  dev_warn(dev,
                         "opl3 not detected at 0x%lx\n", fm_port[n]);
            else {
                  error =     snd_opl3_hwdep_new(opl3, 0, 1, NULL);
                  if (error < 0)
                        goto out;
            }
      }

      if (mpu_irq[n] >= 0 && mpu_irq[n] != SNDRV_AUTO_IRQ &&
                  chip->mpu_port > 0) {
            error = snd_mpu401_uart_new(card, 0, MPU401_HW_ES1688,
                        chip->mpu_port, 0,
                        mpu_irq[n], IRQF_DISABLED, NULL);
            if (error < 0)
                  goto out;
      }

      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_es1688_remove(struct device *dev, unsigned int n)
{
      snd_card_free(dev_get_drvdata(dev));
      dev_set_drvdata(dev, NULL);
      return 0;
}

static struct isa_driver snd_es1688_driver = {
      .match            = snd_es1688_match,
      .probe            = snd_es1688_probe,
      .remove           = __devexit_p(snd_es1688_remove),
#if 0 /* FIXME */
      .suspend    = snd_es1688_suspend,
      .resume           = snd_es1688_resume,
#endif
      .driver           = {
            .name = DEV_NAME
      }
};

static int __init alsa_card_es1688_init(void)
{
      return isa_register_driver(&snd_es1688_driver, SNDRV_CARDS);
}

static void __exit alsa_card_es1688_exit(void)
{
      isa_unregister_driver(&snd_es1688_driver);
}

module_init(alsa_card_es1688_init);
module_exit(alsa_card_es1688_exit);

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