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gusclassic.c

/*
 *  Driver for Gravis UltraSound Classic soundcard
 *  Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
#include <asm/dma.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/gus.h>
#define SNDRV_LEGACY_AUTO_PROBE
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Gravis UltraSound Classic");
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 GUS Classic soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for GUS Classic soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable GUS Classic soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for GUS Classic driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for GUS Classic driver.");
module_param_array(dma1, int, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 # for GUS Classic driver.");
module_param_array(dma2, int, NULL, 0444);
MODULE_PARM_DESC(dma2, "DMA2 # for GUS Classic 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 GUS Classic driver.");
module_param_array(channels, int, NULL, 0444);
MODULE_PARM_DESC(channels, "GF1 channels for GUS Classic driver.");
module_param_array(pcm_channels, int, NULL, 0444);
MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for GUS Classic driver.");

static snd_card_t *snd_gusclassic_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;


static int __init snd_gusclassic_detect(snd_gus_card_t * gus)
{
      snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0);   /* reset GF1 */
#ifdef CONFIG_SND_DEBUG_DETECT
      {
            unsigned char d;

            if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 0) {
                  snd_printk("[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
                  return -ENODEV;
            }
      }
#else
      if ((snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET) & 0x07) != 0)
            return -ENODEV;
#endif
      udelay(160);
      snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);   /* release reset */
      udelay(160);
#ifdef CONFIG_SND_DEBUG_DETECT
      {
            unsigned char d;

            if (((d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET)) & 0x07) != 1) {
                  snd_printk("[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
                  return -ENODEV;
            }
      }
#else
      if ((snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET) & 0x07) != 1)
            return -ENODEV;
#endif

      return 0;
}

static void __init snd_gusclassic_init(int dev, snd_gus_card_t * gus)
{
      gus->equal_irq = 0;
      gus->codec_flag = 0;
      gus->max_flag = 0;
      gus->joystick_dac = joystick_dac[dev];
}

static int __init snd_gusclassic_probe(int dev)
{
      static int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, 4, -1};
      static int possible_dmas[] = {5, 6, 7, 1, 3, -1};
      int xirq, xdma1, xdma2;
      snd_card_t *card;
      struct snd_gusclassic *guscard;
      snd_gus_card_t *gus = NULL;
      int err;

      card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
      if (card == NULL)
            return -ENOMEM;
      guscard = (struct snd_gusclassic *)card->private_data;
      if (pcm_channels[dev] < 2)
            pcm_channels[dev] = 2;

      xirq = irq[dev];
      if (xirq == SNDRV_AUTO_IRQ) {
            if ((xirq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
                  snd_card_free(card);
                  snd_printk("unable to find a free IRQ\n");
                  return -EBUSY;
            }
      }
      xdma1 = dma1[dev];
      if (xdma1 == SNDRV_AUTO_DMA) {
            if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
                  snd_card_free(card);
                  snd_printk("unable to find a free DMA1\n");
                  return -EBUSY;
            }
      }
      xdma2 = dma2[dev];
      if (xdma2 == SNDRV_AUTO_DMA) {
            if ((xdma2 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
                  snd_card_free(card);
                  snd_printk("unable to find a free DMA2\n");
                  return -EBUSY;
            }
      }


      if ((err = snd_gus_create(card,
                          port[dev],
                          xirq, xdma1, xdma2,
                            0, channels[dev], pcm_channels[dev],
                            0, &gus)) < 0) {
            snd_card_free(card);
            return err;
      }
      if ((err = snd_gusclassic_detect(gus)) < 0) {
            snd_card_free(card);
            return err;
      }
      snd_gusclassic_init(dev, gus);
      if ((err = snd_gus_initialize(gus)) < 0) {
            snd_card_free(card);
            return err;
      }
      if (gus->max_flag || gus->ess_flag) {
            snd_printdd("GUS Classic or ACE soundcard was not detected at 0x%lx\n", gus->gf1.port);
            snd_card_free(card);
            return -ENODEV;
      }
      if ((err = snd_gf1_new_mixer(gus)) < 0) {
            snd_card_free(card);
            return err;
      }
      if ((err = snd_gf1_pcm_new(gus, 0, 0, NULL)) < 0) {
            snd_card_free(card);
            return err;
      }
      if (!gus->ace_flag) {
            if ((err = snd_gf1_rawmidi_new(gus, 0, NULL)) < 0) {
                  snd_card_free(card);
                  return err;
            }
      }
      sprintf(card->longname + strlen(card->longname), " at 0x%lx, irq %d, dma %d", gus->gf1.port, xirq, xdma1);
      if (dma2 >= 0)
            sprintf(card->longname + strlen(card->longname), "&%d", xdma2);
      if ((err = snd_card_register(card)) < 0) {
            snd_card_free(card);
            return err;
      }
      snd_gusclassic_cards[dev] = card;
      return 0;
}

static int __init snd_gusclassic_legacy_auto_probe(unsigned long xport)
{
      static int dev;
      int res;

      for ( ; dev < SNDRV_CARDS; dev++) {
            if (!enable[dev] || port[dev] != SNDRV_AUTO_PORT)
                  continue;
            port[dev] = xport;
            res = snd_gusclassic_probe(dev);
            if (res < 0)
                  port[dev] = SNDRV_AUTO_PORT;
            return res;
      }
      return -ENODEV;
}

static int __init alsa_card_gusclassic_init(void)
{
      static unsigned long possible_ports[] = {0x220, 0x230, 0x240, 0x250, 0x260, -1};
      int dev, cards, i;

      for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) {
            if (port[dev] == SNDRV_AUTO_PORT)
                  continue;
            if (snd_gusclassic_probe(dev) >= 0)
                  cards++;
      }
      i = snd_legacy_auto_probe(possible_ports, snd_gusclassic_legacy_auto_probe);
      if (i > 0)
            cards += i;

      if (!cards) {
#ifdef MODULE
            printk(KERN_ERR "GUS Classic soundcard not found or device busy\n");
#endif
            return -ENODEV;
      }
      return 0;
}

static void __exit alsa_card_gusclassic_exit(void)
{
      int idx;
      
      for (idx = 0; idx < SNDRV_CARDS; idx++)
            snd_card_free(snd_gusclassic_cards[idx]);
}

module_init(alsa_card_gusclassic_init)
module_exit(alsa_card_gusclassic_exit)

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