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kernel-ark/sound/isa/cs423x/cs4231.c
Rene Herman dcccdd938e [ALSA] unregister platform device again if probe was unsuccessful 
Unregister the platform device again if the probe was unsuccessful.

This restores the behaviour of not loading the driver on probe() failure.

Signed-off-by: Rene Herman <rene.herman@keyaccess.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-12 11:55:32 +02:00

238 lines
6.7 KiB
C
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/*
* 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 ? SA_INTERRUPT : 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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