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es1688.c

/*
 *  Driver for generic ESS AudioDrive ESx688 soundcards
 *  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/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>

MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("ESS ESx688 AudioDrive");
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 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 ESx688 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for ESx688 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable ESx688 soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for ESx688 driver.");
module_param_array(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for ESx688 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for ESx688 driver.");
module_param_array(mpu_irq, int, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for ESx688 driver.");
module_param_array(dma8, int, NULL, 0444);
MODULE_PARM_DESC(dma8, "8-bit DMA # for ESx688 driver.");

static struct platform_device *devices[SNDRV_CARDS];

#define PFX "es1688: "

static int __init snd_es1688_probe(struct platform_device *pdev)
{
      int dev = pdev->id;
      static int possible_irqs[] = {5, 9, 10, 7, -1};
      static int possible_dmas[] = {1, 3, 0, -1};
      int xirq, xdma, xmpu_irq;
      struct snd_card *card;
      struct snd_es1688 *chip;
      struct snd_opl3 *opl3;
      struct snd_pcm *pcm;
      int err;

      card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
      if (card == NULL)
            return -ENOMEM;

      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;
            }
      }
      xmpu_irq = mpu_irq[dev];
      xdma = dma8[dev];
      if (xdma == SNDRV_AUTO_DMA) {
            if ((xdma = snd_legacy_find_free_dma(possible_dmas)) < 0) {
                  snd_printk(KERN_ERR PFX "unable to find a free DMA\n");
                  err = -EBUSY;
                  goto _err;
            }
      }

      if (port[dev] != SNDRV_AUTO_PORT) {
            if ((err = snd_es1688_create(card, port[dev], mpu_port[dev],
                                   xirq, xmpu_irq, xdma,
                                   ES1688_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_es1688_create(card, possible_ports[i],
                                    mpu_port[dev],
                                    xirq, xmpu_irq, xdma,
                                    ES1688_HW_AUTO, &chip);
                  if (err >= 0) {
                        port[dev] = possible_ports[i];
                        break;
                  }
            }
            if (i >= ARRAY_SIZE(possible_ports))
                  goto _err;
      }

      if ((err = snd_es1688_pcm(chip, 0, &pcm)) < 0)
            goto _err;

      if ((err = snd_es1688_mixer(chip)) < 0)
            goto _err;

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

      if ((snd_opl3_create(card, chip->port, chip->port + 2, OPL3_HW_OPL3, 0, &opl3)) < 0) {
            printk(KERN_WARNING PFX "opl3 not detected at 0x%lx\n", chip->port);
      } else {
            if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0)
                  goto _err;
      }

      if (xmpu_irq >= 0 && xmpu_irq != SNDRV_AUTO_IRQ && chip->mpu_port > 0) {
            if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_ES1688,
                                     chip->mpu_port, 0,
                                     xmpu_irq,
                                     IRQF_DISABLED,
                                     NULL)) < 0)
                  goto _err;
      }

      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_es1688_remove(struct platform_device *devptr)
{
      snd_card_free(platform_get_drvdata(devptr));
      platform_set_drvdata(devptr, NULL);
      return 0;
}

#define ES1688_DRIVER   "snd_es1688"

static struct platform_driver snd_es1688_driver = {
      .probe            = snd_es1688_probe,
      .remove           = snd_es1688_remove,
      /* FIXME: suspend/resume */
      .driver           = {
            .name = ES1688_DRIVER
      },
};

static void __init_or_module snd_es1688_unregister_all(void)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(devices); ++i)
            platform_device_unregister(devices[i]);
      platform_driver_unregister(&snd_es1688_driver);
}

static int __init alsa_card_es1688_init(void)
{
      int i, cards, err;

      err = platform_driver_register(&snd_es1688_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(ES1688_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 "ESS AudioDrive ES1688 soundcard not found or device busy\n");
#endif
            snd_es1688_unregister_all();
            return -ENODEV;
      }
      return 0;
}

static void __exit alsa_card_es1688_exit(void)
{
      snd_es1688_unregister_all();
}

module_init(alsa_card_es1688_init)
module_exit(alsa_card_es1688_exit)

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