mirror of
https://github.com/torvalds/linux.git
synced 2024-12-06 19:11:31 +00:00
dcccdd938e
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>
165 lines
3.8 KiB
C
165 lines
3.8 KiB
C
/*
|
|
* AdLib FM card driver.
|
|
*/
|
|
|
|
#include <sound/driver.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <sound/core.h>
|
|
#include <sound/initval.h>
|
|
#include <sound/opl3.h>
|
|
|
|
#define CRD_NAME "AdLib FM"
|
|
#define DRV_NAME "snd_adlib"
|
|
|
|
MODULE_DESCRIPTION(CRD_NAME);
|
|
MODULE_AUTHOR("Rene Herman");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
|
|
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
|
|
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
|
|
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
|
|
|
|
module_param_array(index, int, NULL, 0444);
|
|
MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
|
|
module_param_array(id, charp, NULL, 0444);
|
|
MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
|
|
module_param_array(enable, bool, NULL, 0444);
|
|
MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
|
|
module_param_array(port, long, NULL, 0444);
|
|
MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
|
|
|
|
static struct platform_device *devices[SNDRV_CARDS];
|
|
|
|
static void snd_adlib_free(struct snd_card *card)
|
|
{
|
|
release_and_free_resource(card->private_data);
|
|
}
|
|
|
|
static int __devinit snd_adlib_probe(struct platform_device *device)
|
|
{
|
|
struct snd_card *card;
|
|
struct snd_opl3 *opl3;
|
|
|
|
int error, i = device->id;
|
|
|
|
if (port[i] == SNDRV_AUTO_PORT) {
|
|
snd_printk(KERN_ERR DRV_NAME ": please specify port\n");
|
|
error = -EINVAL;
|
|
goto out0;
|
|
}
|
|
|
|
card = snd_card_new(index[i], id[i], THIS_MODULE, 0);
|
|
if (!card) {
|
|
snd_printk(KERN_ERR DRV_NAME ": could not create card\n");
|
|
error = -EINVAL;
|
|
goto out0;
|
|
}
|
|
|
|
card->private_data = request_region(port[i], 4, CRD_NAME);
|
|
if (!card->private_data) {
|
|
snd_printk(KERN_ERR DRV_NAME ": could not grab ports\n");
|
|
error = -EBUSY;
|
|
goto out1;
|
|
}
|
|
card->private_free = snd_adlib_free;
|
|
|
|
error = snd_opl3_create(card, port[i], port[i] + 2, OPL3_HW_AUTO, 1, &opl3);
|
|
if (error < 0) {
|
|
snd_printk(KERN_ERR DRV_NAME ": could not create OPL\n");
|
|
goto out1;
|
|
}
|
|
|
|
error = snd_opl3_hwdep_new(opl3, 0, 0, NULL);
|
|
if (error < 0) {
|
|
snd_printk(KERN_ERR DRV_NAME ": could not create FM\n");
|
|
goto out1;
|
|
}
|
|
|
|
strcpy(card->driver, DRV_NAME);
|
|
strcpy(card->shortname, CRD_NAME);
|
|
sprintf(card->longname, CRD_NAME " at %#lx", port[i]);
|
|
|
|
snd_card_set_dev(card, &device->dev);
|
|
|
|
error = snd_card_register(card);
|
|
if (error < 0) {
|
|
snd_printk(KERN_ERR DRV_NAME ": could not register card\n");
|
|
goto out1;
|
|
}
|
|
|
|
platform_set_drvdata(device, card);
|
|
return 0;
|
|
|
|
out1: snd_card_free(card);
|
|
out0: return error;
|
|
}
|
|
|
|
static int __devexit snd_adlib_remove(struct platform_device *device)
|
|
{
|
|
snd_card_free(platform_get_drvdata(device));
|
|
platform_set_drvdata(device, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver snd_adlib_driver = {
|
|
.probe = snd_adlib_probe,
|
|
.remove = __devexit_p(snd_adlib_remove),
|
|
|
|
.driver = {
|
|
.name = DRV_NAME
|
|
}
|
|
};
|
|
|
|
static int __init alsa_card_adlib_init(void)
|
|
{
|
|
int i, cards;
|
|
|
|
if (platform_driver_register(&snd_adlib_driver) < 0) {
|
|
snd_printk(KERN_ERR DRV_NAME ": could not register driver\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (cards = 0, i = 0; i < SNDRV_CARDS; i++) {
|
|
struct platform_device *device;
|
|
|
|
if (!enable[i])
|
|
continue;
|
|
|
|
device = platform_device_register_simple(DRV_NAME, 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 CRD_NAME " soundcard not found or device busy\n");
|
|
#endif
|
|
platform_driver_unregister(&snd_adlib_driver);
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_card_adlib_exit(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < SNDRV_CARDS; i++)
|
|
platform_device_unregister(devices[i]);
|
|
platform_driver_unregister(&snd_adlib_driver);
|
|
}
|
|
|
|
module_init(alsa_card_adlib_init);
|
|
module_exit(alsa_card_adlib_exit);
|