colinux64/patch/audio-core.diff

Index: linux-2.6.22-source/sound/pci/coaudio.c
===================================================================
--- /dev/null
+++ linux-2.6.22-source/sound/pci/coaudio.c
@@ -0,0 +1,208 @@
+
+#include <sound/driver.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include <linux/cooperative.h>
+#include <linux/cooperative_internal.h>
+#include <linux/cooperative_pci.h>
+
+extern int pci_debug;
+
+MODULE_AUTHOR("Steve Shoecraft <sshoecraft@earthlink.net>");
+MODULE_DESCRIPTION("Cooperative Linux Audio Driver");
+MODULE_LICENSE("GPL");
+
+#define COAUDIO_DEBUG 0
+
+typedef struct {
+	struct pci_dev *pdev;
+	struct snd_card *card;
+	int irq;
+} coaudio_dev_t;
+
+static irqreturn_t coaudio_isr(int irq, void *dev_id)
+{
+	return IRQ_HANDLED;
+}
+
+static int coaudio_playback_open(struct snd_pcm_substream *substream)
+{
+        return -EIO;
+}
+
+static int coaudio_playback_close(struct snd_pcm_substream *substream)
+{
+	return -EIO;
+}
+
+static int coaudio_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params)
+{
+	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+}
+
+static int coaudio_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int coaudio_playback_prepare(struct snd_pcm_substream *substream)
+{
+	return -EIO;
+}
+
+static int coaudio_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	return -EIO;
+}
+
+static snd_pcm_uframes_t coaudio_pointer(struct snd_pcm_substream *substream)
+{
+	u16 current_ptr = 0;
+
+	return bytes_to_frames(substream->runtime, current_ptr);
+}
+
+static struct snd_pcm_ops coaudio_playback_ops = {
+	.open =		coaudio_playback_open,
+	.close =	coaudio_playback_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	coaudio_pcm_hw_params,
+	.hw_free =	coaudio_pcm_hw_free,
+	.prepare =	coaudio_playback_prepare,
+	.trigger =	coaudio_trigger,
+	.pointer =	coaudio_pointer,
+};
+
+static int __devinit coaudio_new_pcm(coaudio_dev_t *dev)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	err = snd_pcm_new(dev->card, "COAUDIO", 0, 1, 1, &pcm);
+	if (err < 0) return err;
+	strcpy(pcm->name, "coaudio");
+
+	/* set operators */
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &coaudio_playback_ops);
+
+	/* pre-allocation of buffers */
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(dev->pdev), 64*1024, 64*1024);
+	return 0;
+}
+
+static int coaudio_dev_free(struct snd_device *device)
+{
+	struct coaudio_dev_t *dev = device->device_data;
+
+	kfree(dev);
+	return 0;
+}
+
+static struct snd_device_ops coaudio_device_ops = {
+	.dev_free = coaudio_dev_free,
+};
+
+/****************************************************************************************************
+ *
+ *
+ * PCI functions
+ *
+ *
+ ****************************************************************************************************/
+static int __devinit coaudio_pci_probe( struct pci_dev *pdev, const struct pci_device_id *ent )
+{
+	struct snd_card *card;
+	coaudio_dev_t *dev;
+	int err, irq;
+
+	irq = SOUND_IRQ;
+
+	card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, THIS_MODULE, sizeof(coaudio_dev_t));
+	if (!card) return -ENOMEM;
+
+	strcpy(card->driver, "coaudio");
+	sprintf(card->shortname, "coaudio");
+	sprintf(card->longname, "%s: Cooperative Audio Device using irq %d", card->shortname, irq);
+	if ((err = snd_card_register(card)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	dev = card->private_data;
+	dev->pdev = pdev;
+	dev->card = card;
+	dev->irq = irq;
+
+	if ((err = coaudio_new_pcm(dev)) < 0) {
+		printk(KERN_WARNING "COAUDIO: could not create PCM\n");
+		snd_card_free(card);
+		kfree(dev);
+		return -EIO;
+	}
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, dev, &coaudio_device_ops)) < 0) {
+		snd_card_free(card);
+		kfree(dev);
+		return -EIO;
+	}
+
+	snd_card_set_dev(card, &pdev->dev);
+
+	if (request_irq(dev->irq, coaudio_isr, IRQF_SHARED, card->shortname, card)) {
+		printk(KERN_ERR "coaudio: unable to allocate IRQ %d\n", dev->irq);
+		snd_card_free(card);
+		kfree(dev);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static void __devexit coaudio_pci_remove(struct pci_dev *pdev)
+{
+	struct snd_card *card = pci_get_drvdata(pdev);
+	coaudio_dev_t *dev = card->private_data;
+
+	free_irq(dev->irq, card);
+        snd_card_free(card);
+        pci_set_drvdata(pdev, NULL);
+}
+
+static struct pci_device_id coaudio_pci_ids[] __devinitdata = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_CO, PCI_DEVICE_ID_COAUDIO) },
+	{ 0 }
+};
+
+static struct pci_driver coaudio_pci_driver = {
+	.name = 	"coaudio",
+	.id_table =	coaudio_pci_ids,
+	.probe =	coaudio_pci_probe,
+	.remove =	__devexit_p(coaudio_pci_remove),
+#ifdef CONFIG_PM
+	.suspend = 	coaudio_suspend,
+	.resume =	coaudio_resume,
+#endif
+};
+
+static int __init coaudio_pci_init(void)
+{
+	return pci_register_driver(&coaudio_pci_driver);
+}
+
+static void __exit coaudio_pci_exit(void)
+{
+	pci_unregister_driver(&coaudio_pci_driver);
+}
+
+module_init(coaudio_pci_init)
+module_exit(coaudio_pci_exit)