[ALSA] dummy - Use platform_device (6e65c1cc) · Commits · github.com / kvm-riscv / linux

sound/drivers/dummy.c

+80 −26

Original line number	Diff line number	Diff line
		@@ -20,6 +20,8 @@

		#include <sound/driver.h>
		#include <linux/init.h>
		#include <linux/err.h>
		#include <linux/platform_device.h>
		#include <linux/jiffies.h>
		#include <linux/slab.h>
		#include <linux/time.h>
		@@ -151,6 +153,7 @@ MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");

		struct snd_dummy {
		struct snd_card *card;
		struct snd_pcm *pcm;
		spinlock_t mixer_lock;
		int mixer_volume[MIXER_ADDR_LAST+1][2];
		int capture_source[MIXER_ADDR_LAST+1][2];
		@@ -169,8 +172,6 @@ struct snd_dummy_pcm {
		struct snd_pcm_substream *substream;
		};

		static struct snd_card *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;


		static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
		{
		@@ -190,15 +191,21 @@ static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int c
		int err = 0;

		spin_lock(&dpcm->lock);
		if (cmd == SNDRV_PCM_TRIGGER_START) {
		switch (cmd) {
		case SNDRV_PCM_TRIGGER_START:
		case SNDRV_PCM_TRIGGER_RESUME:
		snd_card_dummy_pcm_timer_start(dpcm);
		} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
		break;
		case SNDRV_PCM_TRIGGER_STOP:
		case SNDRV_PCM_TRIGGER_SUSPEND:
		snd_card_dummy_pcm_timer_stop(dpcm);
		} else {
		break;
		default:
		err = -EINVAL;
		break;
		}
		spin_unlock(&dpcm->lock);
		return err;
		return 0;
		}

		static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
		@@ -251,7 +258,7 @@ static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *su
		static struct snd_pcm_hardware snd_card_dummy_playback =
		{
		.info = (SNDRV_PCM_INFO_MMAP \| SNDRV_PCM_INFO_INTERLEAVED \|
		SNDRV_PCM_INFO_MMAP_VALID),
		SNDRV_PCM_INFO_RESUME \| SNDRV_PCM_INFO_MMAP_VALID),
		.formats = USE_FORMATS,
		.rates = USE_RATE,
		.rate_min = USE_RATE_MIN,
		@@ -269,7 +276,7 @@ static struct snd_pcm_hardware snd_card_dummy_playback =
		static struct snd_pcm_hardware snd_card_dummy_capture =
		{
		.info = (SNDRV_PCM_INFO_MMAP \| SNDRV_PCM_INFO_INTERLEAVED \|
		SNDRV_PCM_INFO_MMAP_VALID),
		SNDRV_PCM_INFO_RESUME \| SNDRV_PCM_INFO_MMAP_VALID),
		.formats = USE_FORMATS,
		.rates = USE_RATE,
		.rate_min = USE_RATE_MIN,
		@@ -405,6 +412,7 @@ static int __init snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int su
		if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device,
		substreams, substreams, &pcm)) < 0)
		return err;
		dummy->pcm = pcm;
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
		pcm->private_data = dummy;
		@@ -547,14 +555,13 @@ static int __init snd_card_dummy_new_mixer(struct snd_dummy *dummy)
		return 0;
		}

		static int __init snd_card_dummy_probe(int dev)
		static int __init snd_dummy_probe(struct platform_device *devptr)
		{
		struct snd_card *card;
		struct snd_dummy *dummy;
		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_dummy));
		if (card == NULL)
		@@ -575,11 +582,10 @@ static int __init snd_card_dummy_probe(int dev)
		strcpy(card->shortname, "Dummy");
		sprintf(card->longname, "Dummy %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_dummy_cards[dev] = card;
		platform_set_drvdata(devptr, card);
		return 0;
		}
		__nodev:
		@@ -587,16 +593,62 @@ static int __init snd_card_dummy_probe(int dev)
		return err;
		}

		static int __init alsa_card_dummy_init(void)
		static int snd_dummy_remove(struct platform_device *devptr)
		{
		int dev, cards;
		snd_card_free(platform_get_drvdata(devptr));
		platform_set_drvdata(devptr, NULL);
		return 0;
		}

		for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) {
		if (snd_card_dummy_probe(dev) < 0) {
		#ifdef MODULE
		printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1);
		#ifdef CONFIG_PM
		static int snd_dummy_suspend(struct platform_device *pdev, pm_message_t state)
		{
		struct snd_card *card = platform_get_drvdata(pdev);
		struct snd_dummy *dummy = card->private_data;

		snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
		snd_pcm_suspend_all(dummy->pcm);
		return 0;
		}

		static int snd_dummy_resume(struct platform_device *pdev)
		{
		struct snd_card *card = platform_get_drvdata(pdev);

		snd_power_change_state(card, SNDRV_CTL_POWER_D0);
		return 0;
		}
		#endif
		break;

		#define SND_DUMMY_DRIVER "snd_dummy"

		static struct platform_driver snd_dummy_driver = {
		.probe = snd_dummy_probe,
		.remove = snd_dummy_remove,
		#ifdef CONFIG_PM
		.suspend = snd_dummy_suspend,
		.resume = snd_dummy_resume,
		#endif
		.driver = {
		.name = SND_DUMMY_DRIVER
		},
		};

		static int __init alsa_card_dummy_init(void)
		{
		int i, cards, err;

		if ((err = platform_driver_register(&snd_dummy_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_DUMMY_DRIVER,
		i, NULL, 0);
		if (IS_ERR(device)) {
		err = PTR_ERR(device);
		goto errout;
		}
		cards++;
		}
		@@ -604,17 +656,19 @@ static int __init alsa_card_dummy_init(void)
		#ifdef MODULE
		printk(KERN_ERR "Dummy soundcard not found or device busy\n");
		#endif
		return -ENODEV;
		err = -ENODEV;
		goto errout;
		}
		return 0;

		errout:
		platform_driver_unregister(&snd_dummy_driver);
		return err;
		}

		static void __exit alsa_card_dummy_exit(void)
		{
		int idx;

		for (idx = 0; idx < SNDRV_CARDS; idx++)
		snd_card_free(snd_dummy_cards[idx]);
		platform_driver_unregister(&snd_dummy_driver);
		}

		module_init(alsa_card_dummy_init)