[linux.git] / sound / oss / soundcard.c

/*
 * linux/sound/oss/soundcard.c
 *
 * Sound card driver for Linux
 *
 *
 * Copyright (C) by Hannu Savolainen 1993-1997
 *
 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
 * Version 2 (June 1991). See the "COPYING" file distributed with this software
 * for more info.
 *
 *
 * Thomas Sailer     : ioctl code reworked (vmalloc/vfree removed)
 *                   integrated sound_switch.c
 * Stefan Reinauer   : integrated /proc/sound (equals to /dev/sndstat,
 *                   which should disappear in the near future)
 * Eric Dumas	     : devfs support (22-Jan-98) <[email protected]> with
 *                   fixups by C. Scott Ananian <[email protected]>
 * Richard Gooch     : moved common (non OSS-specific) devices to sound_core.c
 * Rob Riggs	     : Added persistent DMA buffers support (1998/10/17)
 * Christoph Hellwig : Some cleanup work (2000/03/01)
 */


#include "sound_config.h"
#include <linux/init.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/fcntl.h>
#include <linux/ctype.h>
#include <linux/stddef.h>
#include <linux/kmod.h>
#include <linux/kernel.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <linux/wait.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/device.h>

/*
 * This ought to be moved into include/asm/dma.h
 */
#ifndef valid_dma
#define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
#endif

/*
 * Table for permanently allocated memory (used when unloading the module)
 */
void *          sound_mem_blocks[MAX_MEM_BLOCKS];
static DEFINE_MUTEX(soundcard_mutex);
int             sound_nblocks = 0;

/* Persistent DMA buffers */
#ifdef CONFIG_SOUND_DMAP
int             sound_dmap_flag = 1;
#else
int             sound_dmap_flag = 0;
#endif

static char     dma_alloc_map[MAX_DMA_CHANNELS];

#define DMA_MAP_UNAVAIL		0
#define DMA_MAP_FREE		1
#define DMA_MAP_BUSY		2


unsigned long seq_time = 0;	/* Time for /dev/sequencer */
extern struct class *sound_class;

/*
 * Table for configurable mixer volume handling
 */
static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
static int num_mixer_volumes;

int *load_mixer_volumes(char *name, int *levels, int present)
{
	int             i, n;

	for (i = 0; i < num_mixer_volumes; i++) {
		if (strncmp(name, mixer_vols[i].name, 32) == 0) {
			if (present)
				mixer_vols[i].num = i;
			return mixer_vols[i].levels;
		}
	}
	if (num_mixer_volumes >= MAX_MIXER_DEV) {
		printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
		return levels;
	}
	n = num_mixer_volumes++;

	strncpy(mixer_vols[n].name, name, 32);

	if (present)
		mixer_vols[n].num = n;
	else
		mixer_vols[n].num = -1;

	for (i = 0; i < 32; i++)
		mixer_vols[n].levels[i] = levels[i];
	return mixer_vols[n].levels;
}
EXPORT_SYMBOL(load_mixer_volumes);

static int set_mixer_levels(void __user * arg)
{
        /* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
	mixer_vol_table buf;   

	if (__copy_from_user(&buf, arg, sizeof(buf)))
		return -EFAULT;
	load_mixer_volumes(buf.name, buf.levels, 0);
	if (__copy_to_user(arg, &buf, sizeof(buf)))
		return -EFAULT;
	return 0;
}

static int get_mixer_levels(void __user * arg)
{
	int n;

	if (__get_user(n, (int __user *)(&(((mixer_vol_table __user *)arg)->num))))
		return -EFAULT;
	if (n < 0 || n >= num_mixer_volumes)
		return -EINVAL;
	if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
		return -EFAULT;
	return 0;
}

/* 4K page size but our output routines use some slack for overruns */
#define PROC_BLOCK_SIZE (3*1024)

static ssize_t sound_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
	int dev = iminor(file->f_path.dentry->d_inode);
	int ret = -EINVAL;

	/*
	 *	The OSS drivers aren't remotely happy without this locking,
	 *	and unless someone fixes them when they are about to bite the
	 *	big one anyway, we might as well bandage here..
	 */
	 
	mutex_lock(&soundcard_mutex);
	
	DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
	switch (dev & 0x0f) {
	case SND_DEV_DSP:
	case SND_DEV_DSP16:
	case SND_DEV_AUDIO:
		ret = audio_read(dev, file, buf, count);
		break;

	case SND_DEV_SEQ:
	case SND_DEV_SEQ2:
		ret = sequencer_read(dev, file, buf, count);
		break;

	case SND_DEV_MIDIN:
		ret = MIDIbuf_read(dev, file, buf, count);
	}
	mutex_unlock(&soundcard_mutex);
	return ret;
}

static ssize_t sound_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
	int dev = iminor(file->f_path.dentry->d_inode);
	int ret = -EINVAL;
	
	mutex_lock(&soundcard_mutex);
	DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
	switch (dev & 0x0f) {
	case SND_DEV_SEQ:
	case SND_DEV_SEQ2:
		ret =  sequencer_write(dev, file, buf, count);
		break;

	case SND_DEV_DSP:
	case SND_DEV_DSP16:
	case SND_DEV_AUDIO:
		ret = audio_write(dev, file, buf, count);
		break;

	case SND_DEV_MIDIN:
		ret =  MIDIbuf_write(dev, file, buf, count);
		break;
	}
	mutex_unlock(&soundcard_mutex);
	return ret;
}

static int sound_open(struct inode *inode, struct file *file)
{
	int dev = iminor(inode);
	int retval;

	DEB(printk("sound_open(dev=%d)\n", dev));
	if ((dev >= SND_NDEVS) || (dev < 0)) {
		printk(KERN_ERR "Invalid minor device %d\n", dev);
		return -ENXIO;
	}
	mutex_lock(&soundcard_mutex);
	switch (dev & 0x0f) {
	case SND_DEV_CTL:
		dev >>= 4;
		if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
			request_module("mixer%d", dev);
		}
		retval = -ENXIO;
		if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
			break;
	
		if (!try_module_get(mixer_devs[dev]->owner))
			break;

		retval = 0;
		break;

	case SND_DEV_SEQ:
	case SND_DEV_SEQ2:
		retval = sequencer_open(dev, file);
		break;

	case SND_DEV_MIDIN:
		retval = MIDIbuf_open(dev, file);
		break;

	case SND_DEV_DSP:
	case SND_DEV_DSP16:
	case SND_DEV_AUDIO:
		retval = audio_open(dev, file);
		break;

	default:
		printk(KERN_ERR "Invalid minor device %d\n", dev);
		retval = -ENXIO;
	}

	mutex_unlock(&soundcard_mutex);
	return retval;
}

static int sound_release(struct inode *inode, struct file *file)
{
	int dev = iminor(inode);

	mutex_lock(&soundcard_mutex);
	DEB(printk("sound_release(dev=%d)\n", dev));
	switch (dev & 0x0f) {
	case SND_DEV_CTL:
		module_put(mixer_devs[dev >> 4]->owner);
		break;
		
	case SND_DEV_SEQ:
	case SND_DEV_SEQ2:
		sequencer_release(dev, file);
		break;

	case SND_DEV_MIDIN:
		MIDIbuf_release(dev, file);
		break;

	case SND_DEV_DSP:
	case SND_DEV_DSP16:
	case SND_DEV_AUDIO:
		audio_release(dev, file);
		break;

	default:
		printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
	}
	mutex_unlock(&soundcard_mutex);

	return 0;
}

static int get_mixer_info(int dev, void __user *arg)
{
	mixer_info info;
	memset(&info, 0, sizeof(info));
	strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
	strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
	info.modify_counter = mixer_devs[dev]->modify_counter;
	if (__copy_to_user(arg, &info,  sizeof(info)))
		return -EFAULT;
	return 0;
}

static int get_old_mixer_info(int dev, void __user *arg)
{
	_old_mixer_info info;
	memset(&info, 0, sizeof(info));
 	strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
 	strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
 	if (copy_to_user(arg, &info,  sizeof(info)))
		return -EFAULT;
	return 0;
}

static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
{
 	if (mixdev < 0 || mixdev >= MAX_MIXER_DEV)
 		return -ENXIO;
 	/* Try to load the mixer... */
 	if (mixer_devs[mixdev] == NULL) {
 		request_module("mixer%d", mixdev);
 	}
 	if (mixdev >= num_mixers || !mixer_devs[mixdev])
 		return -ENXIO;
	if (cmd == SOUND_MIXER_INFO)
		return get_mixer_info(mixdev, arg);
	if (cmd == SOUND_OLD_MIXER_INFO)
		return get_old_mixer_info(mixdev, arg);
	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
		mixer_devs[mixdev]->modify_counter++;
	if (!mixer_devs[mixdev]->ioctl)
		return -EINVAL;
	return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
}

static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	int len = 0, dtype;
	int dev = iminor(file->f_dentry->d_inode);
	long ret = -EINVAL;
	void __user *p = (void __user *)arg;

	if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
		/*
		 * Have to validate the address given by the process.
		 */
		len = _SIOC_SIZE(cmd);
		if (len < 1 || len > 65536 || !p)
			return -EFAULT;
		if (_SIOC_DIR(cmd) & _SIOC_WRITE)
			if (!access_ok(VERIFY_READ, p, len))
				return -EFAULT;
		if (_SIOC_DIR(cmd) & _SIOC_READ)
			if (!access_ok(VERIFY_WRITE, p, len))
				return -EFAULT;
	}
	DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
	if (cmd == OSS_GETVERSION)
		return __put_user(SOUND_VERSION, (int __user *)p);
	
	mutex_lock(&soundcard_mutex);
	if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 &&   /* Mixer ioctl */
	    (dev & 0x0f) != SND_DEV_CTL) {              
		dtype = dev & 0x0f;
		switch (dtype) {
		case SND_DEV_DSP:
		case SND_DEV_DSP16:
		case SND_DEV_AUDIO:
			ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
						 cmd, p);
			break;			
		default:
			ret = sound_mixer_ioctl(dev >> 4, cmd, p);
			break;
		}
		mutex_unlock(&soundcard_mutex);
		return ret;
	}

	switch (dev & 0x0f) {
	case SND_DEV_CTL:
		if (cmd == SOUND_MIXER_GETLEVELS)
			ret = get_mixer_levels(p);
		else if (cmd == SOUND_MIXER_SETLEVELS)
			ret = set_mixer_levels(p);
		else
			ret = sound_mixer_ioctl(dev >> 4, cmd, p);
		break;

	case SND_DEV_SEQ:
	case SND_DEV_SEQ2:
		ret = sequencer_ioctl(dev, file, cmd, p);
		break;

	case SND_DEV_DSP:
	case SND_DEV_DSP16:
	case SND_DEV_AUDIO:
		ret = audio_ioctl(dev, file, cmd, p);
		break;

	case SND_DEV_MIDIN:
		ret = MIDIbuf_ioctl(dev, file, cmd, p);
		break;

	}
	mutex_unlock(&soundcard_mutex);
	return ret;
}

static unsigned int sound_poll(struct file *file, poll_table * wait)
{
	struct inode *inode = file->f_path.dentry->d_inode;
	int dev = iminor(inode);

	DEB(printk("sound_poll(dev=%d)\n", dev));
	switch (dev & 0x0f) {
	case SND_DEV_SEQ:
	case SND_DEV_SEQ2:
		return sequencer_poll(dev, file, wait);

	case SND_DEV_MIDIN:
		return MIDIbuf_poll(dev, file, wait);

	case SND_DEV_DSP:
	case SND_DEV_DSP16:
	case SND_DEV_AUDIO:
		return DMAbuf_poll(file, dev >> 4, wait);
	}
	return 0;
}

static int sound_mmap(struct file *file, struct vm_area_struct *vma)
{
	int dev_class;
	unsigned long size;
	struct dma_buffparms *dmap = NULL;
	int dev = iminor(file->f_path.dentry->d_inode);

	dev_class = dev & 0x0f;
	dev >>= 4;

	if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
		printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
		return -EINVAL;
	}
	mutex_lock(&soundcard_mutex);
	if (vma->vm_flags & VM_WRITE)	/* Map write and read/write to the output buf */
		dmap = audio_devs[dev]->dmap_out;
	else if (vma->vm_flags & VM_READ)
		dmap = audio_devs[dev]->dmap_in;
	else {
		printk(KERN_ERR "Sound: Undefined mmap() access\n");
		mutex_unlock(&soundcard_mutex);
		return -EINVAL;
	}

	if (dmap == NULL) {
		printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
		mutex_unlock(&soundcard_mutex);
		return -EIO;
	}
	if (dmap->raw_buf == NULL) {
		printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
		mutex_unlock(&soundcard_mutex);
		return -EIO;
	}
	if (dmap->mapping_flags) {
		printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
		mutex_unlock(&soundcard_mutex);
		return -EIO;
	}
	if (vma->vm_pgoff != 0) {
		printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
		mutex_unlock(&soundcard_mutex);
		return -EINVAL;
	}
	size = vma->vm_end - vma->vm_start;

	if (size != dmap->bytes_in_use) {
		printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
	}
	if (remap_pfn_range(vma, vma->vm_start,
			virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
			vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
		mutex_unlock(&soundcard_mutex);
		return -EAGAIN;
	}

	dmap->mapping_flags |= DMA_MAP_MAPPED;

	if( audio_devs[dev]->d->mmap)
		audio_devs[dev]->d->mmap(dev);

	memset(dmap->raw_buf,
	       dmap->neutral_byte,
	       dmap->bytes_in_use);
	mutex_unlock(&soundcard_mutex);
	return 0;
}

const struct file_operations oss_sound_fops = {
	.owner		= THIS_MODULE,
	.llseek		= no_llseek,
	.read		= sound_read,
	.write		= sound_write,
	.poll		= sound_poll,
	.unlocked_ioctl	= sound_ioctl,
	.mmap		= sound_mmap,
	.open		= sound_open,
	.release	= sound_release,
};

/*
 *	Create the required special subdevices
 */
 
static int create_special_devices(void)
{
	int seq1,seq2;
	seq1=register_sound_special(&oss_sound_fops, 1);
	if(seq1==-1)
		goto bad;
	seq2=register_sound_special(&oss_sound_fops, 8);
	if(seq2!=-1)
		return 0;
	unregister_sound_special(1);
bad:
	return -1;
}


static int dmabuf;
static int dmabug;

module_param(dmabuf, int, 0444);
module_param(dmabug, int, 0444);

/* additional minors for compatibility */
struct oss_minor_dev {
	unsigned short minor;
	unsigned int enabled;
} dev_list[] = {
	{ SND_DEV_DSP16 },
	{ SND_DEV_AUDIO },
};

static int __init oss_init(void)
{
	int             err;
	int i, j;
	
#ifdef CONFIG_PCI
	if(dmabug)
		isa_dma_bridge_buggy = dmabug;
#endif

	err = create_special_devices();
	if (err) {
		printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
		return err;
	}

	/* Protecting the innocent */
	sound_dmap_flag = (dmabuf > 0 ? 1 : 0);

	for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
		j = 0;
		do {
			unsigned short minor = dev_list[i].minor + j * 0x10;
			if (!register_sound_special(&oss_sound_fops, minor))
				dev_list[i].enabled = (1 << j);
		} while (++j < num_audiodevs);
	}

	if (sound_nblocks >= MAX_MEM_BLOCKS - 1)
		printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
	
	return 0;
}

static void __exit oss_cleanup(void)
{
	int i, j;

	for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
		j = 0;
		do {
			if (dev_list[i].enabled & (1 << j))
				unregister_sound_special(dev_list[i].minor);
		} while (++j < num_audiodevs);
	}
	
	unregister_sound_special(1);
	unregister_sound_special(8);

	sound_stop_timer();

	sequencer_unload();

	for (i = 0; i < MAX_DMA_CHANNELS; i++)
		if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
			printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
			sound_free_dma(i);
		}

	for (i = 0; i < sound_nblocks; i++)
		vfree(sound_mem_blocks[i]);

}

module_init(oss_init);
module_exit(oss_cleanup);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("OSS Sound subsystem");
MODULE_AUTHOR("Hannu Savolainen, et al.");


int sound_alloc_dma(int chn, char *deviceID)
{
	int err;

	if ((err = request_dma(chn, deviceID)) != 0)
		return err;

	dma_alloc_map[chn] = DMA_MAP_FREE;

	return 0;
}
EXPORT_SYMBOL(sound_alloc_dma);

int sound_open_dma(int chn, char *deviceID)
{
	if (!valid_dma(chn)) {
		printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
		return 1;
	}

	if (dma_alloc_map[chn] != DMA_MAP_FREE) {
		printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
		return 1;
	}
	dma_alloc_map[chn] = DMA_MAP_BUSY;
	return 0;
}
EXPORT_SYMBOL(sound_open_dma);

void sound_free_dma(int chn)
{
	if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
		/* printk( "sound_free_dma: Bad access to DMA channel %d\n",  chn); */
		return;
	}
	free_dma(chn);
	dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
}
EXPORT_SYMBOL(sound_free_dma);

void sound_close_dma(int chn)
{
	if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
		printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
		return;
	}
	dma_alloc_map[chn] = DMA_MAP_FREE;
}
EXPORT_SYMBOL(sound_close_dma);

static void do_sequencer_timer(unsigned long dummy)
{
	sequencer_timer(0);
}


static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);

void request_sound_timer(int count)
{
	extern unsigned long seq_time;

	if (count < 0) {
		seq_timer.expires = (-count) + jiffies;
		add_timer(&seq_timer);
		return;
	}
	count += seq_time;

	count -= jiffies;

	if (count < 1)
		count = 1;

	seq_timer.expires = (count) + jiffies;
	add_timer(&seq_timer);
}

void sound_stop_timer(void)
{
	del_timer(&seq_timer);
}

void conf_printf(char *name, struct address_info *hw_config)
{
#ifndef CONFIG_SOUND_TRACEINIT
	return;
#else
	printk("<%s> at 0x%03x", name, hw_config->io_base);

	if (hw_config->irq)
		printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);

	if (hw_config->dma != -1 || hw_config->dma2 != -1)
	{
		printk(" dma %d", hw_config->dma);
		if (hw_config->dma2 != -1)
			printk(",%d", hw_config->dma2);
	}
	printk("\n");
#endif
}
EXPORT_SYMBOL(conf_printf);

void conf_printf2(char *name, int base, int irq, int dma, int dma2)
{
#ifndef CONFIG_SOUND_TRACEINIT
	return;
#else
	printk("<%s> at 0x%03x", name, base);

	if (irq)
		printk(" irq %d", (irq > 0) ? irq : -irq);

	if (dma != -1 || dma2 != -1)
	{
		  printk(" dma %d", dma);
		  if (dma2 != -1)
			  printk(",%d", dma2);
	}
	printk("\n");
#endif
}
EXPORT_SYMBOL(conf_printf2);
Commit	Line	Data
1da177e4	1	/*
f30c2269	2	* linux/sound/oss/soundcard.c
1da177e4 LT	3	*
	4	* Sound card driver for Linux
	5	*
	6	*
	7	* Copyright (C) by Hannu Savolainen 1993-1997
	8	*
	9	* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
	10	* Version 2 (June 1991). See the "COPYING" file distributed with this software
	11	* for more info.
	12	*
	13	*
	14	* Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
	15	* integrated sound_switch.c
	16	* Stefan Reinauer : integrated /proc/sound (equals to /dev/sndstat,
	17	* which should disappear in the near future)
	18	* Eric Dumas : devfs support (22-Jan-98) <[email protected]> with
	19	* fixups by C. Scott Ananian <[email protected]>
	20	* Richard Gooch : moved common (non OSS-specific) devices to sound_core.c
	21	* Rob Riggs : Added persistent DMA buffers support (1998/10/17)
	22	* Christoph Hellwig : Some cleanup work (2000/03/01)
	23	*/
	24
1da177e4 LT	25
	26	#include "sound_config.h"
	27	#include <linux/init.h>
	28	#include <linux/types.h>
	29	#include <linux/errno.h>
	30	#include <linux/signal.h>
	31	#include <linux/fcntl.h>
	32	#include <linux/ctype.h>
	33	#include <linux/stddef.h>
	34	#include <linux/kmod.h>
b322f409	35	#include <linux/kernel.h>
1da177e4 LT	36	#include <asm/dma.h>
	37	#include <asm/io.h>
	38	#include <linux/wait.h>
1da177e4	39	#include <linux/ioport.h>
1da177e4 LT	40	#include <linux/major.h>
	41	#include <linux/delay.h>
	42	#include <linux/proc_fs.h>
645ef9ef	43	#include <linux/mutex.h>
1da177e4	44	#include <linux/module.h>
f23f6e08	45	#include <linux/mm.h>
6473d160	46	#include <linux/device.h>
1da177e4 LT	47
	48	/*
	49	* This ought to be moved into include/asm/dma.h
	50	*/
	51	#ifndef valid_dma
	52	#define valid_dma(n) ((n) >= 0 && (n) < MAX_DMA_CHANNELS && (n) != 4)
	53	#endif
	54
	55	/*
	56	* Table for permanently allocated memory (used when unloading the module)
	57	*/
444c1953	58	void * sound_mem_blocks[MAX_MEM_BLOCKS];
645ef9ef	59	static DEFINE_MUTEX(soundcard_mutex);
1da177e4 LT	60	int sound_nblocks = 0;
	61
	62	/* Persistent DMA buffers */
	63	#ifdef CONFIG_SOUND_DMAP
	64	int sound_dmap_flag = 1;
	65	#else
	66	int sound_dmap_flag = 0;
	67	#endif
	68
	69	static char dma_alloc_map[MAX_DMA_CHANNELS];
	70
	71	#define DMA_MAP_UNAVAIL 0
	72	#define DMA_MAP_FREE 1
	73	#define DMA_MAP_BUSY 2
	74
	75
	76	unsigned long seq_time = 0; /* Time for /dev/sequencer */
619e666b	77	extern struct class *sound_class;
1da177e4 LT	78
	79	/*
	80	* Table for configurable mixer volume handling
	81	*/
	82	static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
	83	static int num_mixer_volumes;
	84
	85	int load_mixer_volumes(char name, int *levels, int present)
	86	{
	87	int i, n;
	88
	89	for (i = 0; i < num_mixer_volumes; i++) {
d81a12bc	90	if (strncmp(name, mixer_vols[i].name, 32) == 0) {
1da177e4 LT	91	if (present)
	92	mixer_vols[i].num = i;
	93	return mixer_vols[i].levels;
	94	}
	95	}
	96	if (num_mixer_volumes >= MAX_MIXER_DEV) {
	97	printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
	98	return levels;
	99	}
	100	n = num_mixer_volumes++;
	101
d81a12bc	102	strncpy(mixer_vols[n].name, name, 32);
1da177e4 LT	103
	104	if (present)
	105	mixer_vols[n].num = n;
	106	else
	107	mixer_vols[n].num = -1;
	108
	109	for (i = 0; i < 32; i++)
	110	mixer_vols[n].levels[i] = levels[i];
	111	return mixer_vols[n].levels;
	112	}
ece7f77b	113	EXPORT_SYMBOL(load_mixer_volumes);
1da177e4 LT	114
	115	static int set_mixer_levels(void __user * arg)
	116	{
	117	/* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
	118	mixer_vol_table buf;
	119
	120	if (__copy_from_user(&buf, arg, sizeof(buf)))
	121	return -EFAULT;
	122	load_mixer_volumes(buf.name, buf.levels, 0);
	123	if (__copy_to_user(arg, &buf, sizeof(buf)))
	124	return -EFAULT;
	125	return 0;
	126	}
	127
	128	static int get_mixer_levels(void __user * arg)
	129	{
	130	int n;
	131
	132	if (__get_user(n, (int __user )(&(((mixer_vol_table __user )arg)->num))))
	133	return -EFAULT;
	134	if (n < 0 \|\| n >= num_mixer_volumes)
	135	return -EINVAL;
	136	if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
	137	return -EFAULT;
	138	return 0;
	139	}
	140
	141	/* 4K page size but our output routines use some slack for overruns */
	142	#define PROC_BLOCK_SIZE (3*1024)
	143
	144	static ssize_t sound_read(struct file file, char __user buf, size_t count, loff_t *ppos)
	145	{
7bc56323	146	int dev = iminor(file->f_path.dentry->d_inode);
1da177e4 LT	147	int ret = -EINVAL;
	148
	149	/*
	150	* The OSS drivers aren't remotely happy without this locking,
	151	* and unless someone fixes them when they are about to bite the
	152	* big one anyway, we might as well bandage here..
	153	*/
	154
645ef9ef	155	mutex_lock(&soundcard_mutex);
1da177e4 LT	156
	157	DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
	158	switch (dev & 0x0f) {
	159	case SND_DEV_DSP:
	160	case SND_DEV_DSP16:
	161	case SND_DEV_AUDIO:
	162	ret = audio_read(dev, file, buf, count);
	163	break;
	164
	165	case SND_DEV_SEQ:
	166	case SND_DEV_SEQ2:
	167	ret = sequencer_read(dev, file, buf, count);
	168	break;
	169
	170	case SND_DEV_MIDIN:
	171	ret = MIDIbuf_read(dev, file, buf, count);
	172	}
645ef9ef	173	mutex_unlock(&soundcard_mutex);
1da177e4 LT	174	return ret;
	175	}
	176
	177	static ssize_t sound_write(struct file file, const char __user buf, size_t count, loff_t *ppos)
	178	{
7bc56323	179	int dev = iminor(file->f_path.dentry->d_inode);
1da177e4 LT	180	int ret = -EINVAL;
1da177e4 LT	181
645ef9ef	182	mutex_lock(&soundcard_mutex);
1da177e4 LT	183	DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
	184	switch (dev & 0x0f) {
	185	case SND_DEV_SEQ:
	186	case SND_DEV_SEQ2:
	187	ret = sequencer_write(dev, file, buf, count);
	188	break;
	189
	190	case SND_DEV_DSP:
	191	case SND_DEV_DSP16:
	192	case SND_DEV_AUDIO:
	193	ret = audio_write(dev, file, buf, count);
	194	break;
	195
	196	case SND_DEV_MIDIN:
	197	ret = MIDIbuf_write(dev, file, buf, count);
	198	break;
	199	}
645ef9ef	200	mutex_unlock(&soundcard_mutex);
1da177e4 LT	201	return ret;
	202	}
	203
	204	static int sound_open(struct inode inode, struct file file)
	205	{
	206	int dev = iminor(inode);
	207	int retval;
	208
	209	DEB(printk("sound_open(dev=%d)\n", dev));
	210	if ((dev >= SND_NDEVS) \|\| (dev < 0)) {
	211	printk(KERN_ERR "Invalid minor device %d\n", dev);
	212	return -ENXIO;
	213	}
645ef9ef	214	mutex_lock(&soundcard_mutex);
1da177e4 LT	215	switch (dev & 0x0f) {
	216	case SND_DEV_CTL:
	217	dev >>= 4;
	218	if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
	219	request_module("mixer%d", dev);
	220	}
90dc763f	221	retval = -ENXIO;
1da177e4	222	if (dev && (dev >= num_mixers \|\| mixer_devs[dev] == NULL))
90dc763f	223	break;
1da177e4 LT	224
1da177e4 LT	225	if (!try_module_get(mixer_devs[dev]->owner))
90dc763f AB	226	break;
	227
	228	retval = 0;
1da177e4 LT	229	break;
	230
	231	case SND_DEV_SEQ:
	232	case SND_DEV_SEQ2:
90dc763f	233	retval = sequencer_open(dev, file);
1da177e4 LT	234	break;
	235
	236	case SND_DEV_MIDIN:
90dc763f	237	retval = MIDIbuf_open(dev, file);
1da177e4 LT	238	break;
	239
	240	case SND_DEV_DSP:
	241	case SND_DEV_DSP16:
	242	case SND_DEV_AUDIO:
90dc763f	243	retval = audio_open(dev, file);
1da177e4 LT	244	break;
	245
	246	default:
	247	printk(KERN_ERR "Invalid minor device %d\n", dev);
90dc763f	248	retval = -ENXIO;
1da177e4 LT	249	}
1da177e4 LT	250
645ef9ef	251	mutex_unlock(&soundcard_mutex);
b7d22ccf	252	return retval;
1da177e4 LT	253	}
	254
	255	static int sound_release(struct inode inode, struct file file)
	256	{
	257	int dev = iminor(inode);
	258
645ef9ef	259	mutex_lock(&soundcard_mutex);
1da177e4 LT	260	DEB(printk("sound_release(dev=%d)\n", dev));
	261	switch (dev & 0x0f) {
	262	case SND_DEV_CTL:
	263	module_put(mixer_devs[dev >> 4]->owner);
	264	break;
	265
	266	case SND_DEV_SEQ:
	267	case SND_DEV_SEQ2:
	268	sequencer_release(dev, file);
	269	break;
	270
	271	case SND_DEV_MIDIN:
	272	MIDIbuf_release(dev, file);
	273	break;
	274
	275	case SND_DEV_DSP:
	276	case SND_DEV_DSP16:
	277	case SND_DEV_AUDIO:
	278	audio_release(dev, file);
	279	break;
	280
	281	default:
	282	printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
	283	}
645ef9ef	284	mutex_unlock(&soundcard_mutex);
1da177e4 LT	285
	286	return 0;
	287	}
	288
	289	static int get_mixer_info(int dev, void __user *arg)
	290	{
	291	mixer_info info;
	292	memset(&info, 0, sizeof(info));
	293	strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
	294	strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
	295	info.modify_counter = mixer_devs[dev]->modify_counter;
	296	if (__copy_to_user(arg, &info, sizeof(info)))
	297	return -EFAULT;
	298	return 0;
	299	}
	300
	301	static int get_old_mixer_info(int dev, void __user *arg)
	302	{
	303	_old_mixer_info info;
	304	memset(&info, 0, sizeof(info));
	305	strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
	306	strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
	307	if (copy_to_user(arg, &info, sizeof(info)))
	308	return -EFAULT;
	309	return 0;
	310	}
	311
	312	static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
	313	{
	314	if (mixdev < 0 \|\| mixdev >= MAX_MIXER_DEV)
	315	return -ENXIO;
	316	/* Try to load the mixer... */
	317	if (mixer_devs[mixdev] == NULL) {
	318	request_module("mixer%d", mixdev);
	319	}
	320	if (mixdev >= num_mixers \|\| !mixer_devs[mixdev])
	321	return -ENXIO;
	322	if (cmd == SOUND_MIXER_INFO)
	323	return get_mixer_info(mixdev, arg);
	324	if (cmd == SOUND_OLD_MIXER_INFO)
	325	return get_old_mixer_info(mixdev, arg);
	326	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
	327	mixer_devs[mixdev]->modify_counter++;
	328	if (!mixer_devs[mixdev]->ioctl)
	329	return -EINVAL;
	330	return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
	331	}
	332
6b98515a	333	static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1da177e4 LT	334	{
1da177e4 LT	335	int len = 0, dtype;
6b98515a AC	336	int dev = iminor(file->f_dentry->d_inode);
6b98515a AC	337	long ret = -EINVAL;
1da177e4 LT	338	void __user p = (void __user )arg;
	339
	340	if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
	341	/*
	342	* Have to validate the address given by the process.
	343	*/
	344	len = _SIOC_SIZE(cmd);
	345	if (len < 1 \|\| len > 65536 \|\| !p)
	346	return -EFAULT;
	347	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
	348	if (!access_ok(VERIFY_READ, p, len))
	349	return -EFAULT;
	350	if (_SIOC_DIR(cmd) & _SIOC_READ)
	351	if (!access_ok(VERIFY_WRITE, p, len))
	352	return -EFAULT;
	353	}
	354	DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
	355	if (cmd == OSS_GETVERSION)
	356	return __put_user(SOUND_VERSION, (int __user *)p);
	357
645ef9ef	358	mutex_lock(&soundcard_mutex);
1da177e4 LT	359	if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 && /* Mixer ioctl */
	360	(dev & 0x0f) != SND_DEV_CTL) {
	361	dtype = dev & 0x0f;
	362	switch (dtype) {
	363	case SND_DEV_DSP:
	364	case SND_DEV_DSP16:
	365	case SND_DEV_AUDIO:
6b98515a	366	ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
1da177e4	367	cmd, p);
6b98515a	368	break;
1da177e4	369	default:
6b98515a AC	370	ret = sound_mixer_ioctl(dev >> 4, cmd, p);
6b98515a AC	371	break;
1da177e4	372	}
645ef9ef	373	mutex_unlock(&soundcard_mutex);
6b98515a	374	return ret;
1da177e4	375	}
6b98515a	376
1da177e4 LT	377	switch (dev & 0x0f) {
	378	case SND_DEV_CTL:
	379	if (cmd == SOUND_MIXER_GETLEVELS)
6b98515a AC	380	ret = get_mixer_levels(p);
	381	else if (cmd == SOUND_MIXER_SETLEVELS)
	382	ret = set_mixer_levels(p);
	383	else
	384	ret = sound_mixer_ioctl(dev >> 4, cmd, p);
	385	break;
1da177e4 LT	386
	387	case SND_DEV_SEQ:
	388	case SND_DEV_SEQ2:
6b98515a AC	389	ret = sequencer_ioctl(dev, file, cmd, p);
6b98515a AC	390	break;
1da177e4 LT	391
	392	case SND_DEV_DSP:
	393	case SND_DEV_DSP16:
	394	case SND_DEV_AUDIO:
d4cfa4d1	395	ret = audio_ioctl(dev, file, cmd, p);
1da177e4 LT	396	break;
	397
	398	case SND_DEV_MIDIN:
d4cfa4d1	399	ret = MIDIbuf_ioctl(dev, file, cmd, p);
1da177e4 LT	400	break;
	401
	402	}
645ef9ef	403	mutex_unlock(&soundcard_mutex);
6b98515a	404	return ret;
1da177e4 LT	405	}
	406
	407	static unsigned int sound_poll(struct file file, poll_table wait)
	408	{
7bc56323	409	struct inode *inode = file->f_path.dentry->d_inode;
1da177e4 LT	410	int dev = iminor(inode);
	411
	412	DEB(printk("sound_poll(dev=%d)\n", dev));
	413	switch (dev & 0x0f) {
	414	case SND_DEV_SEQ:
	415	case SND_DEV_SEQ2:
	416	return sequencer_poll(dev, file, wait);
	417
	418	case SND_DEV_MIDIN:
	419	return MIDIbuf_poll(dev, file, wait);
	420
	421	case SND_DEV_DSP:
	422	case SND_DEV_DSP16:
	423	case SND_DEV_AUDIO:
	424	return DMAbuf_poll(file, dev >> 4, wait);
	425	}
	426	return 0;
	427	}
	428
	429	static int sound_mmap(struct file file, struct vm_area_struct vma)
	430	{
	431	int dev_class;
	432	unsigned long size;
	433	struct dma_buffparms *dmap = NULL;
7bc56323	434	int dev = iminor(file->f_path.dentry->d_inode);
1da177e4 LT	435
	436	dev_class = dev & 0x0f;
	437	dev >>= 4;
	438
	439	if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
	440	printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
	441	return -EINVAL;
	442	}
645ef9ef	443	mutex_lock(&soundcard_mutex);
1da177e4 LT	444	if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */
	445	dmap = audio_devs[dev]->dmap_out;
	446	else if (vma->vm_flags & VM_READ)
	447	dmap = audio_devs[dev]->dmap_in;
	448	else {
	449	printk(KERN_ERR "Sound: Undefined mmap() access\n");
645ef9ef	450	mutex_unlock(&soundcard_mutex);
1da177e4 LT	451	return -EINVAL;
	452	}
	453
	454	if (dmap == NULL) {
	455	printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
645ef9ef	456	mutex_unlock(&soundcard_mutex);
1da177e4 LT	457	return -EIO;
	458	}
	459	if (dmap->raw_buf == NULL) {
	460	printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
645ef9ef	461	mutex_unlock(&soundcard_mutex);
1da177e4 LT	462	return -EIO;
	463	}
	464	if (dmap->mapping_flags) {
	465	printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
645ef9ef	466	mutex_unlock(&soundcard_mutex);
1da177e4 LT	467	return -EIO;
	468	}
	469	if (vma->vm_pgoff != 0) {
	470	printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
645ef9ef	471	mutex_unlock(&soundcard_mutex);
1da177e4 LT	472	return -EINVAL;
	473	}
	474	size = vma->vm_end - vma->vm_start;
	475
	476	if (size != dmap->bytes_in_use) {
	477	printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
	478	}
	479	if (remap_pfn_range(vma, vma->vm_start,
	480	virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
	481	vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
645ef9ef	482	mutex_unlock(&soundcard_mutex);
1da177e4 LT	483	return -EAGAIN;
	484	}
	485
	486	dmap->mapping_flags \|= DMA_MAP_MAPPED;
	487
	488	if( audio_devs[dev]->d->mmap)
	489	audio_devs[dev]->d->mmap(dev);
	490
	491	memset(dmap->raw_buf,
	492	dmap->neutral_byte,
	493	dmap->bytes_in_use);
645ef9ef	494	mutex_unlock(&soundcard_mutex);
1da177e4 LT	495	return 0;
	496	}
	497
9c2e08c5	498	const struct file_operations oss_sound_fops = {
1da177e4 LT	499	.owner = THIS_MODULE,
	500	.llseek = no_llseek,
	501	.read = sound_read,
	502	.write = sound_write,
	503	.poll = sound_poll,
6b98515a	504	.unlocked_ioctl = sound_ioctl,
1da177e4 LT	505	.mmap = sound_mmap,
	506	.open = sound_open,
	507	.release = sound_release,
	508	};
	509
	510	/*
	511	* Create the required special subdevices
	512	*/
	513
	514	static int create_special_devices(void)
	515	{
	516	int seq1,seq2;
	517	seq1=register_sound_special(&oss_sound_fops, 1);
	518	if(seq1==-1)
	519	goto bad;
	520	seq2=register_sound_special(&oss_sound_fops, 8);
	521	if(seq2!=-1)
	522	return 0;
	523	unregister_sound_special(1);
	524	bad:
	525	return -1;
	526	}
	527
	528
1da177e4 LT	529	static int dmabuf;
	530	static int dmabug;
	531
	532	module_param(dmabuf, int, 0444);
	533	module_param(dmabug, int, 0444);
	534
848669da TI	535	/* additional minors for compatibility */
	536	struct oss_minor_dev {
	537	unsigned short minor;
	538	unsigned int enabled;
	539	} dev_list[] = {
	540	{ SND_DEV_DSP16 },
	541	{ SND_DEV_AUDIO },
	542	};
	543
1da177e4 LT	544	static int __init oss_init(void)
	545	{
	546	int err;
	547	int i, j;
	548
1da177e4 LT	549	#ifdef CONFIG_PCI
	550	if(dmabug)
	551	isa_dma_bridge_buggy = dmabug;
	552	#endif
	553
	554	err = create_special_devices();
	555	if (err) {
	556	printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
	557	return err;
	558	}
	559
	560	/* Protecting the innocent */
	561	sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
	562
b322f409	563	for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
848669da TI	564	j = 0;
	565	do {
	566	unsigned short minor = dev_list[i].minor + j * 0x10;
	567	if (!register_sound_special(&oss_sound_fops, minor))
	568	dev_list[i].enabled = (1 << j);
	569	} while (++j < num_audiodevs);
1da177e4 LT	570	}
1da177e4 LT	571
444c1953	572	if (sound_nblocks >= MAX_MEM_BLOCKS - 1)
1da177e4 LT	573	printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
	574
	575	return 0;
	576	}
	577
	578	static void __exit oss_cleanup(void)
	579	{
	580	int i, j;
	581
b322f409	582	for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
848669da TI	583	j = 0;
	584	do {
	585	if (dev_list[i].enabled & (1 << j))
	586	unregister_sound_special(dev_list[i].minor);
	587	} while (++j < num_audiodevs);
1da177e4 LT	588	}
	589
	590	unregister_sound_special(1);
	591	unregister_sound_special(8);
	592
	593	sound_stop_timer();
	594
	595	sequencer_unload();
	596
	597	for (i = 0; i < MAX_DMA_CHANNELS; i++)
	598	if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
	599	printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
	600	sound_free_dma(i);
	601	}
	602
	603	for (i = 0; i < sound_nblocks; i++)
	604	vfree(sound_mem_blocks[i]);
	605
	606	}
	607
	608	module_init(oss_init);
	609	module_exit(oss_cleanup);
	610	MODULE_LICENSE("GPL");
ece7f77b AB	611	MODULE_DESCRIPTION("OSS Sound subsystem");
ece7f77b AB	612	MODULE_AUTHOR("Hannu Savolainen, et al.");
1da177e4 LT	613
	614
	615	int sound_alloc_dma(int chn, char *deviceID)
	616	{
	617	int err;
	618
	619	if ((err = request_dma(chn, deviceID)) != 0)
	620	return err;
	621
	622	dma_alloc_map[chn] = DMA_MAP_FREE;
	623
	624	return 0;
	625	}
ece7f77b	626	EXPORT_SYMBOL(sound_alloc_dma);
1da177e4 LT	627
	628	int sound_open_dma(int chn, char *deviceID)
	629	{
	630	if (!valid_dma(chn)) {
	631	printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
	632	return 1;
	633	}
	634
	635	if (dma_alloc_map[chn] != DMA_MAP_FREE) {
	636	printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
	637	return 1;
	638	}
	639	dma_alloc_map[chn] = DMA_MAP_BUSY;
	640	return 0;
	641	}
ece7f77b	642	EXPORT_SYMBOL(sound_open_dma);
1da177e4 LT	643
	644	void sound_free_dma(int chn)
	645	{
	646	if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
	647	/* printk( "sound_free_dma: Bad access to DMA channel %d\n", chn); */
	648	return;
	649	}
	650	free_dma(chn);
	651	dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
	652	}
ece7f77b	653	EXPORT_SYMBOL(sound_free_dma);
1da177e4 LT	654
	655	void sound_close_dma(int chn)
	656	{
	657	if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
	658	printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
	659	return;
	660	}
	661	dma_alloc_map[chn] = DMA_MAP_FREE;
	662	}
ece7f77b	663	EXPORT_SYMBOL(sound_close_dma);
1da177e4 LT	664
	665	static void do_sequencer_timer(unsigned long dummy)
	666	{
	667	sequencer_timer(0);
	668	}
	669
	670
8d06afab	671	static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
1da177e4 LT	672
	673	void request_sound_timer(int count)
	674	{
	675	extern unsigned long seq_time;
	676
	677	if (count < 0) {
	678	seq_timer.expires = (-count) + jiffies;
	679	add_timer(&seq_timer);
	680	return;
	681	}
	682	count += seq_time;
	683
	684	count -= jiffies;
	685
	686	if (count < 1)
	687	count = 1;
	688
	689	seq_timer.expires = (count) + jiffies;
	690	add_timer(&seq_timer);
	691	}
	692
	693	void sound_stop_timer(void)
	694	{
	695	del_timer(&seq_timer);
	696	}
	697
	698	void conf_printf(char name, struct address_info hw_config)
	699	{
	700	#ifndef CONFIG_SOUND_TRACEINIT
	701	return;
	702	#else
	703	printk("<%s> at 0x%03x", name, hw_config->io_base);
	704
	705	if (hw_config->irq)
	706	printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
	707
	708	if (hw_config->dma != -1 \|\| hw_config->dma2 != -1)
	709	{
	710	printk(" dma %d", hw_config->dma);
	711	if (hw_config->dma2 != -1)
	712	printk(",%d", hw_config->dma2);
	713	}
	714	printk("\n");
	715	#endif
	716	}
ece7f77b	717	EXPORT_SYMBOL(conf_printf);
1da177e4 LT	718
	719	void conf_printf2(char *name, int base, int irq, int dma, int dma2)
	720	{
	721	#ifndef CONFIG_SOUND_TRACEINIT
	722	return;
	723	#else
	724	printk("<%s> at 0x%03x", name, base);
	725
	726	if (irq)
	727	printk(" irq %d", (irq > 0) ? irq : -irq);
	728
	729	if (dma != -1 \|\| dma2 != -1)
	730	{
	731	printk(" dma %d", dma);
	732	if (dma2 != -1)
	733	printk(",%d", dma2);
	734	}
	735	printk("\n");
	736	#endif
	737	}
ece7f77b AB	738	EXPORT_SYMBOL(conf_printf2);
ece7f77b AB	739