ad1848.c

linux2.6.16版本

/*
 *  Generic driver for AD1848/AD1847/CS4248 chips (0.1 Alpha)
 *  Copyright (c) by Tugrul Galatali <[e-mail]>,
 *                   Jaroslav Kysela <[e-mail]>
 *  Based on card-4232.c by Jaroslav Kysela <[e-mail]>
 *
 *
 *   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/ad1848.h>
#include <sound/initval.h>

MODULE_AUTHOR("Tugrul Galatali <[e-mail]>, Jaroslav Kysela <[e-mail]>");
MODULE_DESCRIPTION("AD1848/AD1847/CS4248");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1848},"
	        "{Analog Devices,AD1847},"
		"{Crystal Semiconductors,CS4248}}");

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 int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 5,7,9,11,12,15 */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 0,1,3,5,6,7 */
static int thinkpad[SNDRV_CARDS];			/* Thinkpad special case */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for AD1848 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for AD1848 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable AD1848 soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for AD1848 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for AD1848 driver.");
module_param_array(dma1, int, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 # for AD1848 driver.");
module_param_array(thinkpad, bool, NULL, 0444);
MODULE_PARM_DESC(thinkpad, "Enable only for the onboard CS4248 of IBM Thinkpad 360/750/755 series.");

static struct platform_device *devices[SNDRV_CARDS];


static int __init snd_ad1848_probe(struct platform_device *pdev)
{
	int dev = pdev->id;
	struct snd_card *card;
	struct snd_ad1848 *chip;
	struct snd_pcm *pcm;
	int err;

	if (port[dev] == SNDRV_AUTO_PORT) {
		snd_printk(KERN_ERR "ad1848: specify port\n");
		return -EINVAL;
	}
	if (irq[dev] == SNDRV_AUTO_IRQ) {
		snd_printk(KERN_ERR "ad1848: specify irq\n");
		return -EINVAL;
	}
	if (dma1[dev] == SNDRV_AUTO_DMA) {
		snd_printk(KERN_ERR "ad1848: specify dma1\n");
		return -EINVAL;
	}

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

	if ((err = snd_ad1848_create(card, port[dev],
				     irq[dev],
				     dma1[dev],
				     thinkpad[dev] ? AD1848_HW_THINKPAD : AD1848_HW_DETECT,
				     &chip)) < 0)
		goto _err;
	card->private_data = chip;

	if ((err = snd_ad1848_pcm(chip, 0, &pcm)) < 0)
		goto _err;

	if ((err = snd_ad1848_mixer(chip)) < 0)
		goto _err;

	strcpy(card->driver, "AD1848");
	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 (thinkpad[dev])
		strcat(card->longname, " [Thinkpad]");

	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_ad1848_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_ad1848_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct snd_card *card = platform_get_drvdata(pdev);
	struct snd_ad1848 *chip = card->private_data;

	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	chip->suspend(chip);
	return 0;
}

static int snd_ad1848_resume(struct platform_device *pdev)
{
	struct snd_card *card = platform_get_drvdata(pdev);
	struct snd_ad1848 *chip = card->private_data;

	chip->resume(chip);
	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
}
#endif

#define SND_AD1848_DRIVER	"snd_ad1848"

static struct platform_driver snd_ad1848_driver = {
	.probe		= snd_ad1848_probe,
	.remove		= __devexit_p(snd_ad1848_remove),
#ifdef CONFIG_PM
	.suspend	= snd_ad1848_suspend,
	.resume		= snd_ad1848_resume,
#endif
	.driver		= {
		.name	= SND_AD1848_DRIVER
	},
};

static void __init_or_module snd_ad1848_unregister_all(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(devices); ++i)
		platform_device_unregister(devices[i]);
	platform_driver_unregister(&snd_ad1848_driver);
}

static int __init alsa_card_ad1848_init(void)
{
	int i, cards, err;

	err = platform_driver_register(&snd_ad1848_driver);
	if (err < 0)
		return err;

	cards = 0;
	for (i = 0; i < SNDRV_CARDS && enable[i]; i++) {
		struct platform_device *device;
		device = platform_device_register_simple(SND_AD1848_DRIVER,
							 i, NULL, 0);
		if (IS_ERR(device)) {
			err = PTR_ERR(device);
			goto errout;
		}
		devices[i] = device;
		cards++;
	}
	if (!cards) {
#ifdef MODULE
		printk(KERN_ERR "AD1848 soundcard not found or device busy\n");
#endif
		err = -ENODEV;
		goto errout;
	}
	return 0;

 errout:
	snd_ad1848_unregister_all();
	return err;
}

static void __exit alsa_card_ad1848_exit(void)
{
	snd_ad1848_unregister_all();
}

module_init(alsa_card_ad1848_init)
module_exit(alsa_card_ad1848_exit)