Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 352 insertions, 0 deletions

diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
new file mode 100644
index 0000000..d574278
--- /dev/null
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -0,0 +1,352 @@
+/* 
+ * Copyright (C) 2002 Steve Schmidtke 
+ * Licensed under the GPL
+ */
+
+#include "linux/config.h"
+#include "linux/module.h"
+#include "linux/init.h"
+#include "linux/slab.h"
+#include "linux/fs.h"
+#include "linux/sound.h"
+#include "linux/soundcard.h"
+#include "asm/uaccess.h"
+#include "kern_util.h"
+#include "init.h"
+#include "os.h"
+
+struct hostaudio_state {
+  int fd;
+};
+
+struct hostmixer_state {
+  int fd;
+};
+
+#define HOSTAUDIO_DEV_DSP "/dev/sound/dsp"
+#define HOSTAUDIO_DEV_MIXER "/dev/sound/mixer"
+
+/* Only changed from linux_main at boot time */
+char *dsp = HOSTAUDIO_DEV_DSP;
+char *mixer = HOSTAUDIO_DEV_MIXER;
+
+#define DSP_HELP \
+"    This is used to specify the host dsp device to the hostaudio driver.\n" \
+"    The default is \"" HOSTAUDIO_DEV_DSP "\".\n\n"
+
+#define MIXER_HELP \
+"    This is used to specify the host mixer device to the hostaudio driver.\n"\
+"    The default is \"" HOSTAUDIO_DEV_MIXER "\".\n\n"
+
+#ifndef MODULE
+static int set_dsp(char *name, int *add)
+{
+	dsp = name;
+	return(0);
+}
+
+__uml_setup("dsp=", set_dsp, "dsp=<dsp device>\n" DSP_HELP);
+
+static int set_mixer(char *name, int *add)
+{
+	mixer = name;
+	return(0);
+}
+
+__uml_setup("mixer=", set_mixer, "mixer=<mixer device>\n" MIXER_HELP);
+
+#else /*MODULE*/
+
+MODULE_PARM(dsp, "s");
+MODULE_PARM_DESC(dsp, DSP_HELP);
+
+MODULE_PARM(mixer, "s");
+MODULE_PARM_DESC(mixer, MIXER_HELP);
+
+#endif
+
+/* /dev/dsp file operations */
+
+static ssize_t hostaudio_read(struct file *file, char *buffer, size_t count, 
+			      loff_t *ppos)
+{
+        struct hostaudio_state *state = file->private_data;
+	void *kbuf;
+	int err;
+
+#ifdef DEBUG
+        printk("hostaudio: read called, count = %d\n", count);
+#endif
+
+	kbuf = kmalloc(count, GFP_KERNEL);
+	if(kbuf == NULL)
+		return(-ENOMEM);
+
+	err = os_read_file(state->fd, kbuf, count);
+	if(err < 0)
+		goto out;
+
+	if(copy_to_user(buffer, kbuf, err))
+		err = -EFAULT;
+
+ out:
+	kfree(kbuf);
+	return(err);
+}
+
+static ssize_t hostaudio_write(struct file *file, const char *buffer, 
+			       size_t count, loff_t *ppos)
+{
+        struct hostaudio_state *state = file->private_data;
+	void *kbuf;
+	int err;
+
+#ifdef DEBUG
+        printk("hostaudio: write called, count = %d\n", count);
+#endif
+
+	kbuf = kmalloc(count, GFP_KERNEL);
+	if(kbuf == NULL)
+		return(-ENOMEM);
+
+	err = -EFAULT;
+	if(copy_from_user(kbuf, buffer, count))
+		goto out;
+
+	err = os_write_file(state->fd, kbuf, count);
+	if(err < 0)
+		goto out;
+	*ppos += err;
+
+ out:
+	kfree(kbuf);
+	return(err);
+}
+
+static unsigned int hostaudio_poll(struct file *file, 
+				   struct poll_table_struct *wait)
+{
+        unsigned int mask = 0;
+
+#ifdef DEBUG
+        printk("hostaudio: poll called (unimplemented)\n");
+#endif
+
+        return(mask);
+}
+
+static int hostaudio_ioctl(struct inode *inode, struct file *file, 
+			   unsigned int cmd, unsigned long arg)
+{
+        struct hostaudio_state *state = file->private_data;
+	unsigned long data = 0;
+	int err;
+
+#ifdef DEBUG
+        printk("hostaudio: ioctl called, cmd = %u\n", cmd);
+#endif
+	switch(cmd){
+	case SNDCTL_DSP_SPEED:
+	case SNDCTL_DSP_STEREO:
+	case SNDCTL_DSP_GETBLKSIZE:
+	case SNDCTL_DSP_CHANNELS:
+	case SNDCTL_DSP_SUBDIVIDE:
+	case SNDCTL_DSP_SETFRAGMENT:
+		if(get_user(data, (int *) arg))
+			return(-EFAULT);
+		break;
+	default:
+		break;
+	}
+
+	err = os_ioctl_generic(state->fd, cmd, (unsigned long) &data);
+
+	switch(cmd){
+	case SNDCTL_DSP_SPEED:
+	case SNDCTL_DSP_STEREO:
+	case SNDCTL_DSP_GETBLKSIZE:
+	case SNDCTL_DSP_CHANNELS:
+	case SNDCTL_DSP_SUBDIVIDE:
+	case SNDCTL_DSP_SETFRAGMENT:
+		if(put_user(data, (int *) arg))
+			return(-EFAULT);
+		break;
+	default:
+		break;
+	}
+
+	return(err);
+}
+
+static int hostaudio_open(struct inode *inode, struct file *file)
+{
+        struct hostaudio_state *state;
+        int r = 0, w = 0;
+        int ret;
+
+#ifdef DEBUG
+        printk("hostaudio: open called (host: %s)\n", dsp);
+#endif
+
+        state = kmalloc(sizeof(struct hostaudio_state), GFP_KERNEL);
+        if(state == NULL)
+		return(-ENOMEM);
+
+        if(file->f_mode & FMODE_READ) r = 1;
+        if(file->f_mode & FMODE_WRITE) w = 1;
+
+	ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
+        if(ret < 0){
+		kfree(state);
+		return(ret);
+        }
+
+	state->fd = ret;
+        file->private_data = state;
+        return(0);
+}
+
+static int hostaudio_release(struct inode *inode, struct file *file)
+{
+        struct hostaudio_state *state = file->private_data;
+
+#ifdef DEBUG
+        printk("hostaudio: release called\n");
+#endif
+
+		os_close_file(state->fd);
+        kfree(state);
+
+	return(0);
+}
+
+/* /dev/mixer file operations */
+
+static int hostmixer_ioctl_mixdev(struct inode *inode, struct file *file, 
+				  unsigned int cmd, unsigned long arg)
+{
+        struct hostmixer_state *state = file->private_data;
+
+#ifdef DEBUG
+        printk("hostmixer: ioctl called\n");
+#endif
+
+	return(os_ioctl_generic(state->fd, cmd, arg));
+}
+
+static int hostmixer_open_mixdev(struct inode *inode, struct file *file)
+{
+        struct hostmixer_state *state;
+        int r = 0, w = 0;
+        int ret;
+
+#ifdef DEBUG
+        printk("hostmixer: open called (host: %s)\n", mixer);
+#endif
+
+        state = kmalloc(sizeof(struct hostmixer_state), GFP_KERNEL);
+        if(state == NULL) return(-ENOMEM);
+
+        if(file->f_mode & FMODE_READ) r = 1;
+        if(file->f_mode & FMODE_WRITE) w = 1;
+
+	ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
+        
+        if(ret < 0){
+		printk("hostaudio_open_mixdev failed to open '%s', err = %d\n",
+		       dsp, -ret);
+		kfree(state);
+		return(ret);
+        }
+
+        file->private_data = state;
+        return(0);
+}
+
+static int hostmixer_release(struct inode *inode, struct file *file)
+{
+        struct hostmixer_state *state = file->private_data;
+
+#ifdef DEBUG
+        printk("hostmixer: release called\n");
+#endif
+
+		os_close_file(state->fd);
+        kfree(state);
+
+	return(0);
+}
+
+
+/* kernel module operations */
+
+static struct file_operations hostaudio_fops = {
+        .owner          = THIS_MODULE,
+        .llseek         = no_llseek,
+        .read           = hostaudio_read,
+        .write          = hostaudio_write,
+        .poll           = hostaudio_poll,
+        .ioctl          = hostaudio_ioctl,
+        .mmap           = NULL,
+        .open           = hostaudio_open,
+        .release        = hostaudio_release,
+};
+
+static struct file_operations hostmixer_fops = {
+        .owner          = THIS_MODULE,
+        .llseek         = no_llseek,
+        .ioctl          = hostmixer_ioctl_mixdev,
+        .open           = hostmixer_open_mixdev,
+        .release        = hostmixer_release,
+};
+
+struct {
+	int dev_audio;
+	int dev_mixer;
+} module_data;
+
+MODULE_AUTHOR("Steve Schmidtke");
+MODULE_DESCRIPTION("UML Audio Relay");
+MODULE_LICENSE("GPL");
+
+static int __init hostaudio_init_module(void)
+{
+        printk(KERN_INFO "UML Audio Relay (host dsp = %s, host mixer = %s)\n",
+	       dsp, mixer);
+
+	module_data.dev_audio = register_sound_dsp(&hostaudio_fops, -1);
+        if(module_data.dev_audio < 0){
+                printk(KERN_ERR "hostaudio: couldn't register DSP device!\n");
+                return -ENODEV;
+        }
+
+	module_data.dev_mixer = register_sound_mixer(&hostmixer_fops, -1);
+        if(module_data.dev_mixer < 0){
+                printk(KERN_ERR "hostmixer: couldn't register mixer "
+		       "device!\n");
+                unregister_sound_dsp(module_data.dev_audio);
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+static void __exit hostaudio_cleanup_module (void)
+{
+       unregister_sound_mixer(module_data.dev_mixer);
+       unregister_sound_dsp(module_data.dev_audio);
+}
+
+module_init(hostaudio_init_module);
+module_exit(hostaudio_cleanup_module);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */