[ALSA] cs4231 - Use platform_device
Takashi Iwai [Thu, 17 Nov 2005 16:00:41 +0000 (17:00 +0100)]
Modules: CS4231 driver

Rewrite the probe/remove with platform_device.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/cs423x/cs4231.c

index a8da879..b5252a5 100644 (file)
@@ -22,6 +22,8 @@
 
 #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>
@@ -64,14 +66,12 @@ MODULE_PARM_DESC(dma1, "DMA1 # for CS4231 driver.");
 module_param_array(dma2, int, NULL, 0444);
 MODULE_PARM_DESC(dma2, "DMA2 # for CS4231 driver.");
 
-static struct snd_card *snd_cs4231_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
 
-
-static int __init snd_card_cs4231_probe(int dev)
+static int __init snd_cs4231_probe(struct platform_device *pdev)
 {
+       int dev = pdev->id;
        struct snd_card *card;
-       struct snd_card_cs4231 *acard;
-       struct snd_pcm *pcm = NULL;
+       struct snd_pcm *pcm;
        struct snd_cs4231 *chip;
        int err;
 
@@ -90,7 +90,6 @@ static int __init snd_card_cs4231_probe(int dev)
        card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
        if (card == NULL)
                return -ENOMEM;
-       acard = (struct snd_card_cs4231 *)card->private_data;
        if ((err = snd_cs4231_create(card, port[dev], -1,
                                     irq[dev],
                                     dma1[dev],
@@ -98,6 +97,7 @@ static int __init snd_card_cs4231_probe(int dev)
                                     CS4231_HW_DETECT,
                                     0, &chip)) < 0)
                goto _err;
+       card->private_data = chip;
 
        if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0)
                goto _err;
@@ -125,12 +125,12 @@ static int __init snd_card_cs4231_probe(int dev)
                        printk(KERN_WARNING "cs4231: MPU401 not detected\n");
        }
 
-       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_cs4231_cards[dev] = card;
+
+       platform_set_drvdata(pdev, card);
        return 0;
 
  _err:
@@ -138,29 +138,87 @@ static int __init snd_card_cs4231_probe(int dev)
        return err;
 }
 
-static int __init alsa_card_cs4231_init(void)
+static int __devexit snd_cs4231_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_cs4231_suspend(struct platform_device *dev, pm_message_t state)
 {
-       int dev, cards;
+       struct snd_card *card;
+       struct snd_cs4231 *chip;
+       card = platform_get_drvdata(dev);
+       snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+       chip = card->private_data;
+       chip->suspend(chip);
+       return 0;
+}
 
-       for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) {
-               if (snd_card_cs4231_probe(dev) >= 0)
-                       cards++;
+static int snd_cs4231_resume(struct platform_device *dev)
+{
+       struct snd_card *card;
+       struct snd_cs4231 *chip;
+       card = platform_get_drvdata(dev);
+       chip = card->private_data;
+       chip->resume(chip);
+       snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+       return 0;
+}
+#endif
+
+#define SND_CS4231_DRIVER      "snd_cs4231"
+
+static struct platform_driver snd_cs4231_driver = {
+       .probe          = snd_cs4231_probe,
+       .remove         = __devexit_p(snd_cs4231_remove),
+#ifdef CONFIG_PM
+       .suspend        = snd_cs4231_suspend,
+       .resume         = snd_cs4231_resume,
+#endif
+       .driver         = {
+               .name   = SND_CS4231_DRIVER
+       },
+};
+
+static int __init alsa_card_cs4231_init(void)
+{
+       int i, cards, err;
+
+       err = platform_driver_register(&snd_cs4231_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_CS4231_DRIVER,
+                                                        i, NULL, 0);
+               if (IS_ERR(device)) {
+                       err = PTR_ERR(device);
+                       goto errout;
+               }
+               cards++;
        }
        if (!cards) {
 #ifdef MODULE
                printk(KERN_ERR "CS4231 soundcard not found or device busy\n");
 #endif
-               return -ENODEV;
+               err = -ENODEV;
+               goto errout;
        }
        return 0;
+
+ errout:
+       platform_driver_unregister(&snd_cs4231_driver);
+       return err;
 }
 
 static void __exit alsa_card_cs4231_exit(void)
 {
-       int idx;
-
-       for (idx = 0; idx < SNDRV_CARDS; idx++)
-               snd_card_free(snd_cs4231_cards[idx]);
+       platform_driver_unregister(&snd_cs4231_driver);
 }
 
 module_init(alsa_card_cs4231_init)