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gusclassic.c

/*
 *  Driver for Gravis UltraSound Classic soundcard
 *  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/delay.h>
#include <linux/time.h>
#include <linux/moduleparam.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/gus.h>
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>

#define CRD_NAME "Gravis UltraSound Classic"
#define DEV_NAME "gusclassic"

MODULE_DESCRIPTION(CRD_NAME);
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Gravis,UltraSound Classic}}");

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;   /* 0x220,0x230,0x240,0x250,0x260 */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;      /* 3,5,9,11,12,15 */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;     /* 1,3,5,6,7 */
static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;     /* 1,3,5,6,7 */
static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
                        /* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24};
static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};

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(dma2, int, NULL, 0444);
MODULE_PARM_DESC(dma2, "DMA2 # for " CRD_NAME " driver.");
module_param_array(joystick_dac, int, NULL, 0444);
MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for " CRD_NAME " driver.");
module_param_array(channels, int, NULL, 0444);
MODULE_PARM_DESC(channels, "GF1 channels for " CRD_NAME " driver.");
module_param_array(pcm_channels, int, NULL, 0444);
MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for " CRD_NAME " driver.");

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

static int __devinit snd_gusclassic_create(struct snd_card *card,
            struct device *dev, unsigned int n, struct snd_gus_card **rgus)
{
      static long possible_ports[] = {0x220, 0x230, 0x240, 0x250, 0x260};
      static int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, 4, -1};
      static int possible_dmas[] = {5, 6, 7, 1, 3, -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 (dma1[n] == SNDRV_AUTO_DMA) {
            dma1[n] = snd_legacy_find_free_dma(possible_dmas);
            if (dma1[n] < 0) {
                  dev_err(dev, "unable to find a free DMA1\n");
                  return -EBUSY;
            }
      }
      if (dma2[n] == SNDRV_AUTO_DMA) {
            dma2[n] = snd_legacy_find_free_dma(possible_dmas);
            if (dma2[n] < 0) {
                  dev_err(dev, "unable to find a free DMA2\n");
                  return -EBUSY;
            }
      }

      if (port[n] != SNDRV_AUTO_PORT)
            return snd_gus_create(card, port[n], irq[n], dma1[n], dma2[n],
                        0, channels[n], pcm_channels[n], 0, rgus);

      i = 0;
      do {
            port[n] = possible_ports[i];
            error = snd_gus_create(card, port[n], irq[n], dma1[n], dma2[n],
                        0, channels[n], pcm_channels[n], 0, rgus);
      } while (error < 0 && ++i < ARRAY_SIZE(possible_ports));

      return error;
}

static int __devinit snd_gusclassic_detect(struct snd_gus_card *gus)
{
      unsigned char d;

      snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0);   /* reset GF1 */
      if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 0) {
            snd_printdd("[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
            return -ENODEV;
      }
      udelay(160);
      snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);   /* release reset */
      udelay(160);
      if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 1) {
            snd_printdd("[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
            return -ENODEV;
      }
      return 0;
}

static int __devinit snd_gusclassic_probe(struct device *dev, unsigned int n)
{
      struct snd_card *card;
      struct snd_gus_card *gus;
      int error;

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

      if (pcm_channels[n] < 2)
            pcm_channels[n] = 2;

      error = snd_gusclassic_create(card, dev, n, &gus);
      if (error < 0)
            goto out;

      error = snd_gusclassic_detect(gus);
      if (error < 0)
            goto out;

      gus->joystick_dac = joystick_dac[n];

      error = snd_gus_initialize(gus);
      if (error < 0)
            goto out;

      error = -ENODEV;
      if (gus->max_flag || gus->ess_flag) {
            dev_err(dev, "GUS Classic or ACE soundcard was "
                  "not detected at 0x%lx\n", gus->gf1.port);
            goto out;
      }

      error = snd_gf1_new_mixer(gus);
      if (error < 0)
            goto out;

      error = snd_gf1_pcm_new(gus, 0, 0, NULL);
      if (error < 0)
            goto out;

      if (!gus->ace_flag) {
            error = snd_gf1_rawmidi_new(gus, 0, NULL);
            if (error < 0)
                  goto out;
      }

      sprintf(card->longname + strlen(card->longname),
            " at 0x%lx, irq %d, dma %d",
            gus->gf1.port, gus->gf1.irq, gus->gf1.dma1);

      if (gus->gf1.dma2 >= 0)
            sprintf(card->longname + strlen(card->longname),
                  "&%d", gus->gf1.dma2);

      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_gusclassic_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_gusclassic_driver = {
      .match            = snd_gusclassic_match,
      .probe            = snd_gusclassic_probe,
      .remove           = __devexit_p(snd_gusclassic_remove),
#if 0 /* FIXME */
      .suspend    = snd_gusclassic_suspend,
      .remove           = snd_gusclassic_remove,
#endif
      .driver           = {
            .name = DEV_NAME
      }
};

static int __init alsa_card_gusclassic_init(void)
{
      return isa_register_driver(&snd_gusclassic_driver, SNDRV_CARDS);
}

static void __exit alsa_card_gusclassic_exit(void)
{
      isa_unregister_driver(&snd_gusclassic_driver);
}

module_init(alsa_card_gusclassic_init);
module_exit(alsa_card_gusclassic_exit);

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