kernel-ark/sound/isa/sb/sb8.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

293 lines
7.6 KiB
C

/*
* Driver for SoundBlaster 1.0/2.0/Pro soundcards and compatible
* 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/slab.h>
#include <linux/ioport.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/sb.h>
#include <sound/opl3.h>
#include <sound/initval.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Sound Blaster 1.0/2.0/Pro");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Creative Labs,SB 1.0/SB 2.0/SB Pro}}");
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 int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5,7,9,10 */
static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 1,3 */
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Sound Blaster soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for Sound Blaster soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Sound Blaster soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for SB8 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for SB8 driver.");
module_param_array(dma8, int, NULL, 0444);
MODULE_PARM_DESC(dma8, "8-bit DMA # for SB8 driver.");
static struct platform_device *devices[SNDRV_CARDS];
struct snd_sb8 {
struct resource *fm_res; /* used to block FM i/o region for legacy cards */
struct snd_sb *chip;
};
static irqreturn_t snd_sb8_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct snd_sb *chip = dev_id;
if (chip->open & SB_OPEN_PCM) {
return snd_sb8dsp_interrupt(chip);
} else {
return snd_sb8dsp_midi_interrupt(chip);
}
}
static void snd_sb8_free(struct snd_card *card)
{
struct snd_sb8 *acard = (struct snd_sb8 *)card->private_data;
if (acard == NULL)
return;
release_and_free_resource(acard->fm_res);
}
static int __init snd_sb8_probe(struct platform_device *pdev)
{
int dev = pdev->id;
struct snd_sb *chip;
struct snd_card *card;
struct snd_sb8 *acard;
struct snd_opl3 *opl3;
int err;
card = snd_card_new(index[dev], id[dev], THIS_MODULE,
sizeof(struct snd_sb8));
if (card == NULL)
return -ENOMEM;
acard = card->private_data;
card->private_free = snd_sb8_free;
/* block the 0x388 port to avoid PnP conflicts */
acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
if (port[dev] != SNDRV_AUTO_PORT) {
if ((err = snd_sbdsp_create(card, port[dev], irq[dev],
snd_sb8_interrupt,
dma8[dev],
-1,
SB_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_sbdsp_create(card, possible_ports[i],
irq[dev],
snd_sb8_interrupt,
dma8[dev],
-1,
SB_HW_AUTO,
&chip);
if (err >= 0) {
port[dev] = possible_ports[i];
break;
}
}
if (i >= ARRAY_SIZE(possible_ports))
goto _err;
}
acard->chip = chip;
if (chip->hardware >= SB_HW_16) {
if (chip->hardware == SB_HW_ALS100)
snd_printk(KERN_WARNING "ALS100 chip detected at 0x%lx, try snd-als100 module\n",
port[dev]);
else
snd_printk(KERN_WARNING "SB 16 chip detected at 0x%lx, try snd-sb16 module\n",
port[dev]);
err = -ENODEV;
goto _err;
}
if ((err = snd_sb8dsp_pcm(chip, 0, NULL)) < 0)
goto _err;
if ((err = snd_sbmixer_new(chip)) < 0)
goto _err;
if (chip->hardware == SB_HW_10 || chip->hardware == SB_HW_20) {
if ((err = snd_opl3_create(card, chip->port + 8, 0,
OPL3_HW_AUTO, 1,
&opl3)) < 0) {
snd_printk(KERN_WARNING "sb8: no OPL device at 0x%lx\n", chip->port + 8);
}
} else {
if ((err = snd_opl3_create(card, chip->port, chip->port + 2,
OPL3_HW_AUTO, 1,
&opl3)) < 0) {
snd_printk(KERN_WARNING "sb8: no OPL device at 0x%lx-0x%lx\n",
chip->port, chip->port + 2);
}
}
if (err >= 0) {
if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0)
goto _err;
}
if ((err = snd_sb8dsp_midi(chip, 0, NULL)) < 0)
goto _err;
strcpy(card->driver, chip->hardware == SB_HW_PRO ? "SB Pro" : "SB8");
strcpy(card->shortname, chip->name);
sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
chip->name,
chip->port,
irq[dev], dma8[dev]);
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_sb8_remove(struct platform_device *pdev)
{
snd_card_free(platform_get_drvdata(pdev));
platform_set_drvdata(pdev, NULL);
return 0;
}
#ifdef CONFIG_PM
static int snd_sb8_suspend(struct platform_device *dev, pm_message_t state)
{
struct snd_card *card = platform_get_drvdata(dev);
struct snd_sb8 *acard = card->private_data;
struct snd_sb *chip = acard->chip;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
snd_pcm_suspend_all(chip->pcm);
snd_sbmixer_suspend(chip);
return 0;
}
static int snd_sb8_resume(struct platform_device *dev)
{
struct snd_card *card = platform_get_drvdata(dev);
struct snd_sb8 *acard = card->private_data;
struct snd_sb *chip = acard->chip;
snd_sbdsp_reset(chip);
snd_sbmixer_resume(chip);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
#endif
#define SND_SB8_DRIVER "snd_sb8"
static struct platform_driver snd_sb8_driver = {
.probe = snd_sb8_probe,
.remove = snd_sb8_remove,
#ifdef CONFIG_PM
.suspend = snd_sb8_suspend,
.resume = snd_sb8_resume,
#endif
.driver = {
.name = SND_SB8_DRIVER
},
};
static void __init_or_module snd_sb8_unregister_all(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(devices); ++i)
platform_device_unregister(devices[i]);
platform_driver_unregister(&snd_sb8_driver);
}
static int __init alsa_card_sb8_init(void)
{
int i, cards, err;
err = platform_driver_register(&snd_sb8_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_SB8_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
snd_printk(KERN_ERR "Sound Blaster soundcard not found or device busy\n");
#endif
snd_sb8_unregister_all();
return -ENODEV;
}
return 0;
}
static void __exit alsa_card_sb8_exit(void)
{
snd_sb8_unregister_all();
}
module_init(alsa_card_sb8_init)
module_exit(alsa_card_sb8_exit)