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cs4231.c

/*
 *  Generic driver for CS4231 chips
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *  Originally the CS4232/CS4232A driver, modified for use on CS4231 by
 *  Tugrul Galatali <galatalt@stuy.edu>
 *
 *   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 <sound/core.h>
#include <sound/cs4231.h>
#include <sound/mpu401.h>
#include <sound/initval.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Generic CS4231");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Crystal Semiconductors,CS4231}}");

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;   /* PnP setup */
static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* PnP setup */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;      /* 5,7,9,11,12,15 */
static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;  /* 9,11,12,15 */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;     /* 0,1,3,5,6,7 */
static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;     /* 0,1,3,5,6,7 */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for CS4231 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for CS4231 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable CS4231 soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for CS4231 driver.");
module_param_array(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for CS4231 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for CS4231 driver.");
module_param_array(mpu_irq, int, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for CS4231 driver.");
module_param_array(dma1, int, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 # for CS4231 driver.");
module_param_array(dma2, int, NULL, 0444);
MODULE_PARM_DESC(dma2, "DMA2 # for CS4231 driver.");

static struct platform_device *devices[SNDRV_CARDS];


static int __init snd_cs4231_probe(struct platform_device *pdev)
{
      int dev = pdev->id;
      struct snd_card *card;
      struct snd_pcm *pcm;
      struct snd_cs4231 *chip;
      int err;

      if (port[dev] == SNDRV_AUTO_PORT) {
            snd_printk(KERN_ERR "specify port\n");
            return -EINVAL;
      }
      if (irq[dev] == SNDRV_AUTO_IRQ) {
            snd_printk(KERN_ERR "specify irq\n");
            return -EINVAL;
      }
      if (dma1[dev] == SNDRV_AUTO_DMA) {
            snd_printk(KERN_ERR "specify dma1\n");
            return -EINVAL;
      }
      card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
      if (card == NULL)
            return -ENOMEM;
      if ((err = snd_cs4231_create(card, port[dev], -1,
                             irq[dev],
                             dma1[dev],
                             dma2[dev],
                             CS4231_HW_DETECT,
                             0, &chip)) < 0)
            goto _err;
      card->private_data = chip;

      if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0)
            goto _err;

      strcpy(card->driver, "CS4231");
      strcpy(card->shortname, pcm->name);
      sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
            pcm->name, chip->port, irq[dev], dma1[dev]);
      if (dma2[dev] >= 0)
            sprintf(card->longname + strlen(card->longname), "&%d", dma2[dev]);

      if ((err = snd_cs4231_mixer(chip)) < 0)
            goto _err;
      if ((err = snd_cs4231_timer(chip, 0, NULL)) < 0)
            goto _err;

      if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
            if (mpu_irq[dev] == SNDRV_AUTO_IRQ)
                  mpu_irq[dev] = -1;
            if (snd_mpu401_uart_new(card, 0, MPU401_HW_CS4232,
                              mpu_port[dev], 0,
                              mpu_irq[dev],
                              mpu_irq[dev] >= 0 ? IRQF_DISABLED : 0,
                              NULL) < 0)
                  printk(KERN_WARNING "cs4231: MPU401 not detected\n");
      }

      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 __devexit snd_cs4231_remove(struct platform_device *devptr)
{
      snd_card_free(platform_get_drvdata(devptr));
      platform_set_drvdata(devptr, NULL);
      return 0;
}

#ifdef CONFIG_PM
static int snd_cs4231_suspend(struct platform_device *dev, pm_message_t state)
{
      struct snd_card *card;
      struct snd_cs4231 *chip;
      card = platform_get_drvdata(dev);
      snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
      chip = card->private_data;
      chip->suspend(chip);
      return 0;
}

static int snd_cs4231_resume(struct platform_device *dev)
{
      struct snd_card *card;
      struct snd_cs4231 *chip;
      card = platform_get_drvdata(dev);
      chip = card->private_data;
      chip->resume(chip);
      snd_power_change_state(card, SNDRV_CTL_POWER_D0);
      return 0;
}
#endif

#define SND_CS4231_DRIVER     "snd_cs4231"

static struct platform_driver snd_cs4231_driver = {
      .probe            = snd_cs4231_probe,
      .remove           = __devexit_p(snd_cs4231_remove),
#ifdef CONFIG_PM
      .suspend    = snd_cs4231_suspend,
      .resume           = snd_cs4231_resume,
#endif
      .driver           = {
            .name = SND_CS4231_DRIVER
      },
};

static void __init_or_module snd_cs4231_unregister_all(void)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(devices); ++i)
            platform_device_unregister(devices[i]);
      platform_driver_unregister(&snd_cs4231_driver);
}

static int __init alsa_card_cs4231_init(void)
{
      int i, cards, err;

      err = platform_driver_register(&snd_cs4231_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(SND_CS4231_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 "CS4231 soundcard not found or device busy\n");
#endif
            snd_cs4231_unregister_all();
            return -ENODEV;
      }
      return 0;
}

static void __exit alsa_card_cs4231_exit(void)
{
      snd_cs4231_unregister_all();
}

module_init(alsa_card_cs4231_init)
module_exit(alsa_card_cs4231_exit)

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