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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 <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.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>

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 struct platform_device *devices[SNDRV_CARDS];


#define PFX "gusclassic: "

static int __init 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 void __init snd_gusclassic_init(int dev, struct snd_gus_card * 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(struct platform_device *pdev)
{
      int dev = pdev->id;
      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;
      struct snd_card *card;
      struct snd_gus_card *gus = NULL;
      int err;

      card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
      if (card == NULL)
            return -ENOMEM;
      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_printk(KERN_ERR PFX "unable to find a free IRQ\n");
                  err = -EBUSY;
                  goto _err;
            }
      }
      xdma1 = dma1[dev];
      if (xdma1 == SNDRV_AUTO_DMA) {
            if ((xdma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
                  snd_printk(KERN_ERR PFX "unable to find a free DMA1\n");
                  err = -EBUSY;
                  goto _err;
            }
      }
      xdma2 = dma2[dev];
      if (xdma2 == SNDRV_AUTO_DMA) {
            if ((xdma2 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
                  snd_printk(KERN_ERR PFX "unable to find a free DMA2\n");
                  err = -EBUSY;
                  goto _err;
            }
      }

      if (port[dev] != SNDRV_AUTO_PORT) {
            err = snd_gus_create(card,
                             port[dev],
                             xirq, xdma1, xdma2,
                             0, channels[dev], pcm_channels[dev],
                             0, &gus);
      } else {
            /* auto-probe legacy ports */
            static unsigned long possible_ports[] = {
                  0x220, 0x230, 0x240, 0x250, 0x260,
            };
            int i;
            for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
                  err = snd_gus_create(card,
                                   possible_ports[i],
                                   xirq, xdma1, xdma2,
                                   0, channels[dev], pcm_channels[dev],
                                   0, &gus);
                  if (err >= 0) {
                        port[dev] = possible_ports[i];
                        break;
                  }
            }
      }
      if (err < 0)
            goto _err;

      if ((err = snd_gusclassic_detect(gus)) < 0)
            goto _err;

      snd_gusclassic_init(dev, gus);
      if ((err = snd_gus_initialize(gus)) < 0)
            goto _err;

      if (gus->max_flag || gus->ess_flag) {
            snd_printk(KERN_ERR PFX "GUS Classic or ACE soundcard was not detected at 0x%lx\n", gus->gf1.port);
            err = -ENODEV;
            goto _err;
      }

      if ((err = snd_gf1_new_mixer(gus)) < 0)
            goto _err;

      if ((err = snd_gf1_pcm_new(gus, 0, 0, NULL)) < 0)
            goto _err;

      if (!gus->ace_flag) {
            if ((err = snd_gf1_rawmidi_new(gus, 0, NULL)) < 0)
                  goto _err;
      }
      sprintf(card->longname + strlen(card->longname), " at 0x%lx, irq %d, dma %d", gus->gf1.port, xirq, xdma1);
      if (xdma2 >= 0)
            sprintf(card->longname + strlen(card->longname), "&%d", xdma2);

      snd_card_set_dev(card, &pdev->dev);

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

      platform_set_drvdata(pdev, card);
      return 0;

 _err:
      snd_card_free(card);
      return err;
}

static int snd_gusclassic_remove(struct platform_device *devptr)
{
      snd_card_free(platform_get_drvdata(devptr));
      platform_set_drvdata(devptr, NULL);
      return 0;
}

#define GUSCLASSIC_DRIVER     "snd_gusclassic"

static struct platform_driver snd_gusclassic_driver = {
      .probe            = snd_gusclassic_probe,
      .remove           = snd_gusclassic_remove,
      /* FIXME: suspend/resume */
      .driver           = {
            .name = GUSCLASSIC_DRIVER
      },
};

static void __init_or_module snd_gusclassic_unregister_all(void)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(devices); ++i)
            platform_device_unregister(devices[i]);
      platform_driver_unregister(&snd_gusclassic_driver);
}

static int __init alsa_card_gusclassic_init(void)
{
      int i, cards, err;

      err = platform_driver_register(&snd_gusclassic_driver);
      if (err < 0)
            return err;

      cards = 0;
      for (i = 0; i < SNDRV_CARDS; i++) {
            struct platform_device *device;
            if (! enable[i])
                  continue;
            device = platform_device_register_simple(GUSCLASSIC_DRIVER,
                                           i, NULL, 0);
            if (IS_ERR(device))
                  continue;
            if (!platform_get_drvdata(device)) {
                  platform_device_unregister(device);
                  continue;
            }
            devices[i] = device;
            cards++;
      }
      if (!cards) {
#ifdef MODULE
            printk(KERN_ERR "GUS Classic soundcard not found or device busy\n");
#endif
            snd_gusclassic_unregister_all();
            return -ENODEV;
      }
      return 0;
}

static void __exit alsa_card_gusclassic_exit(void)
{
      snd_gusclassic_unregister_all();
}

module_init(alsa_card_gusclassic_init)
module_exit(alsa_card_gusclassic_exit)

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