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Commit 68668845 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
Browse files

[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: default avatarTakashi Iwai <tiwai@suse.de>
parent c66d7f72

sound/isa/ad1848/ad1848.c

+73 −16
Original line number Diff line number Diff line
@@ -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)