From 3564fbb880f9a62ddbb81b7440c32e0e6619c52d Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 17 Nov 2005 16:03:26 +0100
Subject: [PATCH] [ALSA] virmidi - Use platform_device

Modules: Generic drivers

Rewrite the probe/remove code using platform_device.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/drivers/virmidi.c | 62 ++++++++++++++++++++++++++++-------------
 1 file changed, 42 insertions(+), 20 deletions(-)

diff --git a/sound/drivers/virmidi.c b/sound/drivers/virmidi.c
index 0d2cc6ea73ee..a7b9241fff3c 100644
--- a/sound/drivers/virmidi.c
+++ b/sound/drivers/virmidi.c
@@ -45,6 +45,8 @@
 #include <linux/init.h>
 #include <linux/wait.h>
 #include <linux/sched.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
 #include <linux/moduleparam.h>
 #include <sound/core.h>
 #include <sound/seq_kernel.h>
@@ -80,17 +82,14 @@ struct snd_card_virmidi {
 	struct snd_rawmidi *midi[MAX_MIDI_DEVICES];
 };
 
-static struct snd_card *snd_virmidi_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
 
-
-static int __init snd_card_virmidi_probe(int dev)
+static int __init snd_virmidi_probe(struct platform_device *devptr)
 {
 	struct snd_card *card;
 	struct snd_card_virmidi *vmidi;
 	int idx, err;
+	int dev = devptr->id;
 
-	if (!enable[dev])
-		return -ENODEV;
 	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
 			    sizeof(struct snd_card_virmidi));
 	if (card == NULL)
@@ -117,11 +116,10 @@ static int __init snd_card_virmidi_probe(int dev)
 	strcpy(card->shortname, "VirMIDI");
 	sprintf(card->longname, "Virtual MIDI Card %i", dev + 1);
 
-	if ((err = snd_card_set_generic_dev(card)) < 0)
-		goto __nodev;
+	snd_card_set_dev(card, &devptr->dev);
 
 	if ((err = snd_card_register(card)) == 0) {
-		snd_virmidi_cards[dev] = card;
+		platform_set_drvdata(devptr, card);
 		return 0;
 	}
       __nodev:
@@ -129,16 +127,38 @@ static int __init snd_card_virmidi_probe(int dev)
 	return err;
 }
 
+static int snd_virmidi_remove(struct platform_device *devptr)
+{
+	snd_card_free(platform_get_drvdata(devptr));
+	platform_set_drvdata(devptr, NULL);
+	return 0;
+}
+
+#define SND_VIRMIDI_DRIVER	"snd_virmidi"
+
+static struct platform_driver snd_virmidi_driver = {
+	.probe		= snd_virmidi_probe,
+	.remove		= snd_virmidi_remove,
+	.driver		= {
+		.name	= SND_VIRMIDI_DRIVER
+	},
+};
+
 static int __init alsa_card_virmidi_init(void)
 {
-	int dev, cards;
+	int i, cards, err;
 
-	for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) {
-		if (snd_card_virmidi_probe(dev) < 0) {
-#ifdef MODULE
-			printk(KERN_ERR "Card-VirMIDI #%i not found or device busy\n", dev + 1);
-#endif
-			break;
+	if ((err = platform_driver_register(&snd_virmidi_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_VIRMIDI_DRIVER,
+							 i, NULL, 0);
+		if (IS_ERR(device)) {
+			err = PTR_ERR(device);
+			goto errout;
 		}
 		cards++;
 	}
@@ -146,17 +166,19 @@ static int __init alsa_card_virmidi_init(void)
 #ifdef MODULE
 		printk(KERN_ERR "Card-VirMIDI soundcard not found or device busy\n");
 #endif
-		return -ENODEV;
+		err = -ENODEV;
+		goto errout;
 	}
 	return 0;
+
+ errout:
+	platform_driver_unregister(&snd_virmidi_driver);
+	return err;
 }
 
 static void __exit alsa_card_virmidi_exit(void)
 {
-	int dev;
-
-	for (dev = 0; dev < SNDRV_CARDS; dev++)
-		snd_card_free(snd_virmidi_cards[dev]);
+	platform_driver_unregister(&snd_virmidi_driver);
 }
 
 module_init(alsa_card_virmidi_init)