[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>

1 files changed, 73 insertions, 16 deletions

diff --git a/sound/isa/ad1848/ad1848.c b/sound/isa/ad1848/ad1848.c
index ffc373b37a9b..1019e9fdff53 100644
--- a/sound/isa/ad1848/ad1848.c
+++ b/sound/isa/ad1848/ad1848.c
@@ -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 __init alsa_card_ad1848_init(void)
+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)
 {
-        int dev, cards;
+        struct snd_card *card = platform_get_drvdata(pdev);
+        struct snd_ad1848 *chip = card->private_data;
 
-        for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++)
-                if (snd_card_ad1848_probe(dev) >= 0)
-                        cards++;
+        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 i, cards, err;
+
+        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)