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[ALSA] serial-u16550 - Use platform_device 

Modules: Generic drivers

Rewrite the probe/remove code using platform_device.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-11-17 16:02:30 +01:00 committed by Jaroslav Kysela
parent 077d0ac5b6
commit 9caf6b5908
1 changed files with 45 additions and 23 deletions
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68
sound/drivers/serial-u16550.c
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@ -33,6 +33,8 @@
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/moduleparam.h>
@ -166,8 +168,6 @@ typedef struct _snd_uart16550 {
} snd_uart16550_t;
static struct snd_card *snd_serial_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
static inline void snd_uart16550_add_timer(snd_uart16550_t *uart)
{
if (! uart->timer_running) {
@ -869,14 +869,12 @@ static int __init snd_uart16550_rmidi(snd_uart16550_t *uart, int device, int out
return 0;
}
static int __init snd_serial_probe(int dev)
static int __init snd_serial_probe(struct platform_device *devptr)
{
struct snd_card *card;
snd_uart16550_t *uart;
int err;
if (!enable[dev])
return -ENOENT;
int dev = devptr->id;
switch (adaptor[dev]) {
case SNDRV_SERIAL_SOUNDCANVAS:
@ -942,13 +940,12 @@ static int __init snd_serial_probe(int dev)
adaptor_names[uart->adaptor],
uart->drop_on_full);
if ((err = snd_card_set_generic_dev(card)) < 0)
goto _err;
snd_card_set_dev(card, &devptr->dev);
if ((err = snd_card_register(card)) < 0)
goto _err;
snd_serial_cards[dev] = card;
platform_set_drvdata(devptr, card);
return 0;
_err:
@ -956,33 +953,58 @@ static int __init snd_serial_probe(int dev)
return err;
}
static int snd_serial_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
platform_set_drvdata(devptr, NULL);
return 0;
}
#define SND_SERIAL_DRIVER "snd_serial_u16550"
static struct platform_driver snd_serial_driver = {
.probe = snd_serial_probe,
.remove = snd_serial_remove,
.driver = {
.name = SND_SERIAL_DRIVER
},
};
static int __init alsa_card_serial_init(void)
{
int dev = 0;
int cards = 0;
int i, cards, err;
for (dev = 0; dev < SNDRV_CARDS; dev++) {
if (snd_serial_probe(dev) == 0)
cards++;
if ((err = platform_driver_register(&snd_serial_driver)) < 0)
return err;
cards = 0;
for (i = 0; i < SNDRV_CARDS && enable[i]; i++) {
struct platform_device *device;
device = platform_device_register_simple(SND_SERIAL_DRIVER,
i, NULL, 0);
if (IS_ERR(device)) {
err = PTR_ERR(device);
goto errout;
}
cards++;
}
if (cards == 0) {
if (! cards) {
#ifdef MODULE
printk(KERN_ERR "serial midi soundcard not found or device busy\n");
#endif
return -ENODEV;
err = -ENODEV;
goto errout;
}
return 0;
errout:
platform_driver_unregister(&snd_serial_driver);
return err;
}
static void __exit alsa_card_serial_exit(void)
{
int dev;
for (dev = 0; dev < SNDRV_CARDS; dev++) {
if (snd_serial_cards[dev] != NULL)
snd_card_free(snd_serial_cards[dev]);
}
platform_driver_unregister(&snd_serial_driver);
}
module_init(alsa_card_serial_init)