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[ALSA] ad1848 - Use platform_device, add PM 

Modules: AD1848 driver

Rewrite the probe/remove with platform_device.
Add the PM support, too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-11-17 16:58:26 +01:00 committed by Jaroslav Kysela
parent c66d7f7256
commit 686688458e
1 changed files with 72 additions and 15 deletions
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87
sound/isa/ad1848/ad1848.c
View File

@ -23,6 +23,8 @@
#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>
@ -60,11 +62,10 @@ 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 snd_card *snd_ad1848_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
static int __init snd_card_ad1848_probe(int dev)
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;
@ -93,6 +94,7 @@ static int __init snd_card_ad1848_probe(int 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;
@ -109,13 +111,12 @@ static int __init snd_card_ad1848_probe(int dev)
if (thinkpad[dev])
strcat(card->longname, " [Thinkpad]");
if ((err = snd_card_set_generic_dev(card)) < 0)
goto _err;
snd_card_set_dev(card, &pdev->dev);
if ((err = snd_card_register(card)) < 0)
goto _err;
snd_ad1848_cards[dev] = card;
platform_set_drvdata(pdev, card);
return 0;
_err:
@ -123,29 +124,85 @@ static int __init snd_card_ad1848_probe(int dev)
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 int __init alsa_card_ad1848_init(void)
{
int dev, cards;
int i, cards, err;
for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++)
if (snd_card_ad1848_probe(dev) >= 0)
cards++;
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;
}
cards++;
}
if (!cards) {
#ifdef MODULE
printk(KERN_ERR "AD1848 soundcard not found or device busy\n");
#endif
return -ENODEV;
err = -ENODEV;
goto errout;
}
return 0;
errout:
platform_driver_unregister(&snd_ad1848_driver);
return err;
}
static void __exit alsa_card_ad1848_exit(void)
{
int idx;
for (idx = 0; idx < SNDRV_CARDS; idx++)
snd_card_free(snd_ad1848_cards[idx]);
platform_driver_unregister(&snd_ad1848_driver);
}
module_init(alsa_card_ad1848_init)