[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/smp_lock.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];
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 (strcmp(name, mixer_vols[i].name) == 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++;

	strcpy(mixer_vols[n].name, name);

	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..
	 */
	 
	lock_kernel();
	
	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);
	}
	unlock_kernel();
	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;
	
	lock_kernel();
	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;
	}
	unlock_kernel();
	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;
	}
	lock_kernel();
	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;
	}

	unlock_kernel();
	return 0;
}

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

	lock_kernel();
	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);
	}
	unlock_kernel();

	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);
	
	lock_kernel();
	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;
		}
		unlock_kernel();
		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:
		return audio_ioctl(dev, file, cmd, p);
		break;

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

	}
	unlock_kernel();
	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;
	}
	lock_kernel();
	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");
		unlock_kernel();
		return -EINVAL;
	}

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


/* These device names follow the official Linux device list,
 * Documentation/devices.txt.  Let us know if there are other
 * common names we should support for compatibility.
 * Only those devices not created by the generic code in sound_core.c are
 * registered here.
 */
static const struct {
	unsigned short minor;
	char *name;
	umode_t mode;
	int *num;
} dev_list[] = { /* list of minor devices */
/* seems to be some confusion here -- this device is not in the device list */
	{SND_DEV_DSP16,     "dspW",	 S_IWUGO | S_IRUSR | S_IRGRP,
	 &num_audiodevs},
	{SND_DEV_AUDIO,     "audio",	 S_IWUGO | S_IRUSR | S_IRGRP,
	 &num_audiodevs},
};

static int dmabuf;
static int dmabug;

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

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++) {
		device_create(sound_class, NULL,
			      MKDEV(SOUND_MAJOR, dev_list[i].minor), NULL,
			      "%s", dev_list[i].name);

		if (!dev_list[i].num)
			continue;

		for (j = 1; j < *dev_list[i].num; j++)
			device_create(sound_class, NULL,
				      MKDEV(SOUND_MAJOR,
					    dev_list[i].minor + (j*0x10)),
				      NULL, "%s%d", dev_list[i].name, j);
	}

	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++) {
		device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
		if (!dev_list[i].num)
			continue;
		for (j = 1; j < *dev_list[i].num; j++)
			device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
	}
	
	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>
	43	#include <linux/smp_lock.h>
	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];
1da177e4 LT	59	int sound_nblocks = 0;
	60
	61	/* Persistent DMA buffers */
	62	#ifdef CONFIG_SOUND_DMAP
	63	int sound_dmap_flag = 1;
	64	#else
	65	int sound_dmap_flag = 0;
	66	#endif
	67
	68	static char dma_alloc_map[MAX_DMA_CHANNELS];
	69
	70	#define DMA_MAP_UNAVAIL 0
	71	#define DMA_MAP_FREE 1
	72	#define DMA_MAP_BUSY 2
	73
	74
	75	unsigned long seq_time = 0; /* Time for /dev/sequencer */
619e666b	76	extern struct class *sound_class;
1da177e4 LT	77
	78	/*
	79	* Table for configurable mixer volume handling
	80	*/
	81	static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
	82	static int num_mixer_volumes;
	83
	84	int load_mixer_volumes(char name, int *levels, int present)
	85	{
	86	int i, n;
	87
	88	for (i = 0; i < num_mixer_volumes; i++) {
	89	if (strcmp(name, mixer_vols[i].name) == 0) {
	90	if (present)
	91	mixer_vols[i].num = i;
	92	return mixer_vols[i].levels;
	93	}
	94	}
	95	if (num_mixer_volumes >= MAX_MIXER_DEV) {
	96	printk(KERN_ERR "Sound: Too many mixers (%s)\n", name);
	97	return levels;
	98	}
	99	n = num_mixer_volumes++;
	100
	101	strcpy(mixer_vols[n].name, name);
	102
	103	if (present)
	104	mixer_vols[n].num = n;
	105	else
	106	mixer_vols[n].num = -1;
	107
	108	for (i = 0; i < 32; i++)
	109	mixer_vols[n].levels[i] = levels[i];
	110	return mixer_vols[n].levels;
	111	}
ece7f77b	112	EXPORT_SYMBOL(load_mixer_volumes);
1da177e4 LT	113
	114	static int set_mixer_levels(void __user * arg)
	115	{
	116	/* mixer_vol_table is 174 bytes, so IMHO no reason to not allocate it on the stack */
	117	mixer_vol_table buf;
	118
	119	if (__copy_from_user(&buf, arg, sizeof(buf)))
	120	return -EFAULT;
	121	load_mixer_volumes(buf.name, buf.levels, 0);
	122	if (__copy_to_user(arg, &buf, sizeof(buf)))
	123	return -EFAULT;
	124	return 0;
	125	}
	126
	127	static int get_mixer_levels(void __user * arg)
	128	{
	129	int n;
	130
	131	if (__get_user(n, (int __user )(&(((mixer_vol_table __user )arg)->num))))
	132	return -EFAULT;
	133	if (n < 0 \|\| n >= num_mixer_volumes)
	134	return -EINVAL;
	135	if (__copy_to_user(arg, &mixer_vols[n], sizeof(mixer_vol_table)))
	136	return -EFAULT;
	137	return 0;
	138	}
	139
	140	/* 4K page size but our output routines use some slack for overruns */
	141	#define PROC_BLOCK_SIZE (3*1024)
	142
	143	static ssize_t sound_read(struct file file, char __user buf, size_t count, loff_t *ppos)
	144	{
7bc56323	145	int dev = iminor(file->f_path.dentry->d_inode);
1da177e4 LT	146	int ret = -EINVAL;
	147
	148	/*
	149	* The OSS drivers aren't remotely happy without this locking,
	150	* and unless someone fixes them when they are about to bite the
	151	* big one anyway, we might as well bandage here..
	152	*/
	153
	154	lock_kernel();
	155
	156	DEB(printk("sound_read(dev=%d, count=%d)\n", dev, count));
	157	switch (dev & 0x0f) {
	158	case SND_DEV_DSP:
	159	case SND_DEV_DSP16:
	160	case SND_DEV_AUDIO:
	161	ret = audio_read(dev, file, buf, count);
	162	break;
	163
	164	case SND_DEV_SEQ:
	165	case SND_DEV_SEQ2:
	166	ret = sequencer_read(dev, file, buf, count);
	167	break;
	168
	169	case SND_DEV_MIDIN:
	170	ret = MIDIbuf_read(dev, file, buf, count);
	171	}
	172	unlock_kernel();
	173	return ret;
	174	}
	175
	176	static ssize_t sound_write(struct file file, const char __user buf, size_t count, loff_t *ppos)
	177	{
7bc56323	178	int dev = iminor(file->f_path.dentry->d_inode);
1da177e4 LT	179	int ret = -EINVAL;
	180
	181	lock_kernel();
	182	DEB(printk("sound_write(dev=%d, count=%d)\n", dev, count));
	183	switch (dev & 0x0f) {
	184	case SND_DEV_SEQ:
	185	case SND_DEV_SEQ2:
	186	ret = sequencer_write(dev, file, buf, count);
	187	break;
	188
	189	case SND_DEV_DSP:
	190	case SND_DEV_DSP16:
	191	case SND_DEV_AUDIO:
	192	ret = audio_write(dev, file, buf, count);
	193	break;
	194
	195	case SND_DEV_MIDIN:
	196	ret = MIDIbuf_write(dev, file, buf, count);
	197	break;
	198	}
	199	unlock_kernel();
	200	return ret;
	201	}
	202
	203	static int sound_open(struct inode inode, struct file file)
	204	{
	205	int dev = iminor(inode);
	206	int retval;
	207
	208	DEB(printk("sound_open(dev=%d)\n", dev));
	209	if ((dev >= SND_NDEVS) \|\| (dev < 0)) {
	210	printk(KERN_ERR "Invalid minor device %d\n", dev);
	211	return -ENXIO;
	212	}
90dc763f	213	lock_kernel();
1da177e4 LT	214	switch (dev & 0x0f) {
	215	case SND_DEV_CTL:
	216	dev >>= 4;
	217	if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
	218	request_module("mixer%d", dev);
	219	}
90dc763f	220	retval = -ENXIO;
1da177e4	221	if (dev && (dev >= num_mixers \|\| mixer_devs[dev] == NULL))
90dc763f	222	break;
1da177e4 LT	223
1da177e4 LT	224	if (!try_module_get(mixer_devs[dev]->owner))
90dc763f AB	225	break;
	226
	227	retval = 0;
1da177e4 LT	228	break;
	229
	230	case SND_DEV_SEQ:
	231	case SND_DEV_SEQ2:
90dc763f	232	retval = sequencer_open(dev, file);
1da177e4 LT	233	break;
	234
	235	case SND_DEV_MIDIN:
90dc763f	236	retval = MIDIbuf_open(dev, file);
1da177e4 LT	237	break;
	238
	239	case SND_DEV_DSP:
	240	case SND_DEV_DSP16:
	241	case SND_DEV_AUDIO:
90dc763f	242	retval = audio_open(dev, file);
1da177e4 LT	243	break;
	244
	245	default:
	246	printk(KERN_ERR "Invalid minor device %d\n", dev);
90dc763f	247	retval = -ENXIO;
1da177e4 LT	248	}
1da177e4 LT	249
90dc763f	250	unlock_kernel();
1da177e4 LT	251	return 0;
	252	}
	253
	254	static int sound_release(struct inode inode, struct file file)
	255	{
	256	int dev = iminor(inode);
	257
	258	lock_kernel();
	259	DEB(printk("sound_release(dev=%d)\n", dev));
	260	switch (dev & 0x0f) {
	261	case SND_DEV_CTL:
	262	module_put(mixer_devs[dev >> 4]->owner);
	263	break;
	264
	265	case SND_DEV_SEQ:
	266	case SND_DEV_SEQ2:
	267	sequencer_release(dev, file);
	268	break;
	269
	270	case SND_DEV_MIDIN:
	271	MIDIbuf_release(dev, file);
	272	break;
	273
	274	case SND_DEV_DSP:
	275	case SND_DEV_DSP16:
	276	case SND_DEV_AUDIO:
	277	audio_release(dev, file);
	278	break;
	279
	280	default:
	281	printk(KERN_ERR "Sound error: Releasing unknown device 0x%02x\n", dev);
	282	}
	283	unlock_kernel();
	284
	285	return 0;
	286	}
	287
	288	static int get_mixer_info(int dev, void __user *arg)
	289	{
	290	mixer_info info;
	291	memset(&info, 0, sizeof(info));
	292	strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
	293	strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
	294	info.modify_counter = mixer_devs[dev]->modify_counter;
	295	if (__copy_to_user(arg, &info, sizeof(info)))
	296	return -EFAULT;
	297	return 0;
	298	}
	299
	300	static int get_old_mixer_info(int dev, void __user *arg)
	301	{
	302	_old_mixer_info info;
	303	memset(&info, 0, sizeof(info));
	304	strlcpy(info.id, mixer_devs[dev]->id, sizeof(info.id));
	305	strlcpy(info.name, mixer_devs[dev]->name, sizeof(info.name));
	306	if (copy_to_user(arg, &info, sizeof(info)))
	307	return -EFAULT;
	308	return 0;
	309	}
	310
	311	static int sound_mixer_ioctl(int mixdev, unsigned int cmd, void __user *arg)
	312	{
	313	if (mixdev < 0 \|\| mixdev >= MAX_MIXER_DEV)
	314	return -ENXIO;
315	/* Try to load the mixer... */
316	if (mixer_devs[mixdev] == NULL) {
317	request_module("mixer%d", mixdev);
318	}
319	if (mixdev >= num_mixers \|\| !mixer_devs[mixdev])
320	return -ENXIO;
321	if (cmd == SOUND_MIXER_INFO)
322	return get_mixer_info(mixdev, arg);
323	if (cmd == SOUND_OLD_MIXER_INFO)
324	return get_old_mixer_info(mixdev, arg);
325	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
326	mixer_devs[mixdev]->modify_counter++;
327	if (!mixer_devs[mixdev]->ioctl)
328	return -EINVAL;
329	return mixer_devs[mixdev]->ioctl(mixdev, cmd, arg);
330	}
331
6b98515a	332	static long sound_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1da177e4 LT	333	{
1da177e4 LT	334	int len = 0, dtype;
6b98515a AC	335	int dev = iminor(file->f_dentry->d_inode);
6b98515a AC	336	long ret = -EINVAL;
1da177e4 LT	337	void __user p = (void __user )arg;
	338
	339	if (_SIOC_DIR(cmd) != _SIOC_NONE && _SIOC_DIR(cmd) != 0) {
	340	/*
	341	* Have to validate the address given by the process.
	342	*/
	343	len = _SIOC_SIZE(cmd);
	344	if (len < 1 \|\| len > 65536 \|\| !p)
	345	return -EFAULT;
	346	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
	347	if (!access_ok(VERIFY_READ, p, len))
	348	return -EFAULT;
	349	if (_SIOC_DIR(cmd) & _SIOC_READ)
	350	if (!access_ok(VERIFY_WRITE, p, len))
	351	return -EFAULT;
	352	}
	353	DEB(printk("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
	354	if (cmd == OSS_GETVERSION)
	355	return __put_user(SOUND_VERSION, (int __user *)p);
	356
6b98515a	357	lock_kernel();
1da177e4 LT	358	if (_IOC_TYPE(cmd) == 'M' && num_mixers > 0 && /* Mixer ioctl */
	359	(dev & 0x0f) != SND_DEV_CTL) {
	360	dtype = dev & 0x0f;
	361	switch (dtype) {
	362	case SND_DEV_DSP:
	363	case SND_DEV_DSP16:
	364	case SND_DEV_AUDIO:
6b98515a	365	ret = sound_mixer_ioctl(audio_devs[dev >> 4]->mixer_dev,
1da177e4	366	cmd, p);
6b98515a	367	break;
1da177e4	368	default:
6b98515a AC	369	ret = sound_mixer_ioctl(dev >> 4, cmd, p);
6b98515a AC	370	break;
1da177e4	371	}
6b98515a AC	372	unlock_kernel();
6b98515a AC	373	return ret;
1da177e4	374	}
6b98515a	375
1da177e4 LT	376	switch (dev & 0x0f) {
	377	case SND_DEV_CTL:
	378	if (cmd == SOUND_MIXER_GETLEVELS)
6b98515a AC	379	ret = get_mixer_levels(p);
	380	else if (cmd == SOUND_MIXER_SETLEVELS)
	381	ret = set_mixer_levels(p);
	382	else
	383	ret = sound_mixer_ioctl(dev >> 4, cmd, p);
	384	break;
1da177e4 LT	385
	386	case SND_DEV_SEQ:
	387	case SND_DEV_SEQ2:
6b98515a AC	388	ret = sequencer_ioctl(dev, file, cmd, p);
6b98515a AC	389	break;
1da177e4 LT	390
	391	case SND_DEV_DSP:
	392	case SND_DEV_DSP16:
	393	case SND_DEV_AUDIO:
	394	return audio_ioctl(dev, file, cmd, p);
	395	break;
	396
	397	case SND_DEV_MIDIN:
	398	return MIDIbuf_ioctl(dev, file, cmd, p);
	399	break;
	400
	401	}
6b98515a AC	402	unlock_kernel();
6b98515a AC	403	return ret;
1da177e4 LT	404	}
	405
	406	static unsigned int sound_poll(struct file file, poll_table wait)
	407	{
7bc56323	408	struct inode *inode = file->f_path.dentry->d_inode;
1da177e4 LT	409	int dev = iminor(inode);
	410
	411	DEB(printk("sound_poll(dev=%d)\n", dev));
	412	switch (dev & 0x0f) {
	413	case SND_DEV_SEQ:
	414	case SND_DEV_SEQ2:
	415	return sequencer_poll(dev, file, wait);
	416
	417	case SND_DEV_MIDIN:
	418	return MIDIbuf_poll(dev, file, wait);
	419
	420	case SND_DEV_DSP:
	421	case SND_DEV_DSP16:
	422	case SND_DEV_AUDIO:
	423	return DMAbuf_poll(file, dev >> 4, wait);
	424	}
	425	return 0;
	426	}
	427
	428	static int sound_mmap(struct file file, struct vm_area_struct vma)
	429	{
	430	int dev_class;
	431	unsigned long size;
	432	struct dma_buffparms *dmap = NULL;
7bc56323	433	int dev = iminor(file->f_path.dentry->d_inode);
1da177e4 LT	434
	435	dev_class = dev & 0x0f;
	436	dev >>= 4;
	437
	438	if (dev_class != SND_DEV_DSP && dev_class != SND_DEV_DSP16 && dev_class != SND_DEV_AUDIO) {
	439	printk(KERN_ERR "Sound: mmap() not supported for other than audio devices\n");
	440	return -EINVAL;
	441	}
	442	lock_kernel();
	443	if (vma->vm_flags & VM_WRITE) /* Map write and read/write to the output buf */
	444	dmap = audio_devs[dev]->dmap_out;
	445	else if (vma->vm_flags & VM_READ)
	446	dmap = audio_devs[dev]->dmap_in;
	447	else {
	448	printk(KERN_ERR "Sound: Undefined mmap() access\n");
	449	unlock_kernel();
	450	return -EINVAL;
	451	}
	452
	453	if (dmap == NULL) {
	454	printk(KERN_ERR "Sound: mmap() error. dmap == NULL\n");
	455	unlock_kernel();
	456	return -EIO;
	457	}
	458	if (dmap->raw_buf == NULL) {
	459	printk(KERN_ERR "Sound: mmap() called when raw_buf == NULL\n");
	460	unlock_kernel();
	461	return -EIO;
	462	}
	463	if (dmap->mapping_flags) {
	464	printk(KERN_ERR "Sound: mmap() called twice for the same DMA buffer\n");
	465	unlock_kernel();
	466	return -EIO;
	467	}
	468	if (vma->vm_pgoff != 0) {
	469	printk(KERN_ERR "Sound: mmap() offset must be 0.\n");
	470	unlock_kernel();
	471	return -EINVAL;
	472	}
	473	size = vma->vm_end - vma->vm_start;
	474
	475	if (size != dmap->bytes_in_use) {
	476	printk(KERN_WARNING "Sound: mmap() size = %ld. Should be %d\n", size, dmap->bytes_in_use);
	477	}
	478	if (remap_pfn_range(vma, vma->vm_start,
	479	virt_to_phys(dmap->raw_buf) >> PAGE_SHIFT,
	480	vma->vm_end - vma->vm_start, vma->vm_page_prot)) {
	481	unlock_kernel();
	482	return -EAGAIN;
	483	}
	484
	485	dmap->mapping_flags \|= DMA_MAP_MAPPED;
	486
	487	if( audio_devs[dev]->d->mmap)
	488	audio_devs[dev]->d->mmap(dev);
	489
	490	memset(dmap->raw_buf,
	491	dmap->neutral_byte,
	492	dmap->bytes_in_use);
	493	unlock_kernel();
	494	return 0;
	495	}
	496
9c2e08c5	497	const struct file_operations oss_sound_fops = {
1da177e4 LT	498	.owner = THIS_MODULE,
	499	.llseek = no_llseek,
	500	.read = sound_read,
	501	.write = sound_write,
	502	.poll = sound_poll,
6b98515a	503	.unlocked_ioctl = sound_ioctl,
1da177e4 LT	504	.mmap = sound_mmap,
	505	.open = sound_open,
	506	.release = sound_release,
	507	};
	508
	509	/*
	510	* Create the required special subdevices
	511	*/
	512
	513	static int create_special_devices(void)
	514	{
	515	int seq1,seq2;
	516	seq1=register_sound_special(&oss_sound_fops, 1);
	517	if(seq1==-1)
	518	goto bad;
	519	seq2=register_sound_special(&oss_sound_fops, 8);
	520	if(seq2!=-1)
	521	return 0;
	522	unregister_sound_special(1);
	523	bad:
	524	return -1;
	525	}
	526
	527
	528	/* These device names follow the official Linux device list,
	529	* Documentation/devices.txt. Let us know if there are other
	530	* common names we should support for compatibility.
	531	* Only those devices not created by the generic code in sound_core.c are
	532	* registered here.
	533	*/
	534	static const struct {
	535	unsigned short minor;
	536	char *name;
	537	umode_t mode;
	538	int *num;
	539	} dev_list[] = { /* list of minor devices */
	540	/* seems to be some confusion here -- this device is not in the device list */
	541	{SND_DEV_DSP16, "dspW", S_IWUGO \| S_IRUSR \| S_IRGRP,
	542	&num_audiodevs},
	543	{SND_DEV_AUDIO, "audio", S_IWUGO \| S_IRUSR \| S_IRGRP,
	544	&num_audiodevs},
	545	};
	546
	547	static int dmabuf;
	548	static int dmabug;
	549
	550	module_param(dmabuf, int, 0444);
	551	module_param(dmabug, int, 0444);
	552
	553	static int __init oss_init(void)
	554	{
	555	int err;
	556	int i, j;
	557
1da177e4 LT	558	#ifdef CONFIG_PCI
	559	if(dmabug)
	560	isa_dma_bridge_buggy = dmabug;
	561	#endif
	562
	563	err = create_special_devices();
	564	if (err) {
	565	printk(KERN_ERR "sound: driver already loaded/included in kernel\n");
	566	return err;
	567	}
	568
	569	/* Protecting the innocent */
	570	sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
	571
b322f409	572	for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
abe9ab8f GKH	573	device_create(sound_class, NULL,
	574	MKDEV(SOUND_MAJOR, dev_list[i].minor), NULL,
	575	"%s", dev_list[i].name);
1da177e4 LT	576
	577	if (!dev_list[i].num)
	578	continue;
	579
0936f26f	580	for (j = 1; j < *dev_list[i].num; j++)
abe9ab8f GKH	581	device_create(sound_class, NULL,
	582	MKDEV(SOUND_MAJOR,
	583	dev_list[i].minor + (j*0x10)),
	584	NULL, "%s%d", dev_list[i].name, j);
1da177e4 LT	585	}
1da177e4 LT	586
444c1953	587	if (sound_nblocks >= MAX_MEM_BLOCKS - 1)
1da177e4 LT	588	printk(KERN_ERR "Sound warning: Deallocation table was too small.\n");
	589
	590	return 0;
	591	}
	592
	593	static void __exit oss_cleanup(void)
	594	{
	595	int i, j;
	596
b322f409	597	for (i = 0; i < ARRAY_SIZE(dev_list); i++) {
d80f19fa	598	device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
1da177e4 LT	599	if (!dev_list[i].num)
1da177e4 LT	600	continue;
0936f26f	601	for (j = 1; j < *dev_list[i].num; j++)
d80f19fa	602	device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
1da177e4 LT	603	}
	604
	605	unregister_sound_special(1);
	606	unregister_sound_special(8);
	607
	608	sound_stop_timer();
	609
	610	sequencer_unload();
	611
	612	for (i = 0; i < MAX_DMA_CHANNELS; i++)
	613	if (dma_alloc_map[i] != DMA_MAP_UNAVAIL) {
	614	printk(KERN_ERR "Sound: Hmm, DMA%d was left allocated - fixed\n", i);
	615	sound_free_dma(i);
	616	}
	617
	618	for (i = 0; i < sound_nblocks; i++)
	619	vfree(sound_mem_blocks[i]);
	620
	621	}
	622
	623	module_init(oss_init);
	624	module_exit(oss_cleanup);
	625	MODULE_LICENSE("GPL");
ece7f77b AB	626	MODULE_DESCRIPTION("OSS Sound subsystem");
ece7f77b AB	627	MODULE_AUTHOR("Hannu Savolainen, et al.");
1da177e4 LT	628
	629
	630	int sound_alloc_dma(int chn, char *deviceID)
	631	{
	632	int err;
	633
	634	if ((err = request_dma(chn, deviceID)) != 0)
	635	return err;
	636
	637	dma_alloc_map[chn] = DMA_MAP_FREE;
	638
	639	return 0;
	640	}
ece7f77b	641	EXPORT_SYMBOL(sound_alloc_dma);
1da177e4 LT	642
	643	int sound_open_dma(int chn, char *deviceID)
	644	{
	645	if (!valid_dma(chn)) {
	646	printk(KERN_ERR "sound_open_dma: Invalid DMA channel %d\n", chn);
	647	return 1;
	648	}
	649
	650	if (dma_alloc_map[chn] != DMA_MAP_FREE) {
	651	printk("sound_open_dma: DMA channel %d busy or not allocated (%d)\n", chn, dma_alloc_map[chn]);
	652	return 1;
	653	}
	654	dma_alloc_map[chn] = DMA_MAP_BUSY;
	655	return 0;
	656	}
ece7f77b	657	EXPORT_SYMBOL(sound_open_dma);
1da177e4 LT	658
	659	void sound_free_dma(int chn)
	660	{
	661	if (dma_alloc_map[chn] == DMA_MAP_UNAVAIL) {
	662	/* printk( "sound_free_dma: Bad access to DMA channel %d\n", chn); */
	663	return;
	664	}
	665	free_dma(chn);
	666	dma_alloc_map[chn] = DMA_MAP_UNAVAIL;
	667	}
ece7f77b	668	EXPORT_SYMBOL(sound_free_dma);
1da177e4 LT	669
	670	void sound_close_dma(int chn)
	671	{
	672	if (dma_alloc_map[chn] != DMA_MAP_BUSY) {
	673	printk(KERN_ERR "sound_close_dma: Bad access to DMA channel %d\n", chn);
	674	return;
	675	}
	676	dma_alloc_map[chn] = DMA_MAP_FREE;
	677	}
ece7f77b	678	EXPORT_SYMBOL(sound_close_dma);
1da177e4 LT	679
	680	static void do_sequencer_timer(unsigned long dummy)
	681	{
	682	sequencer_timer(0);
	683	}
	684
	685
8d06afab	686	static DEFINE_TIMER(seq_timer, do_sequencer_timer, 0, 0);
1da177e4 LT	687
	688	void request_sound_timer(int count)
	689	{
	690	extern unsigned long seq_time;
	691
	692	if (count < 0) {
	693	seq_timer.expires = (-count) + jiffies;
	694	add_timer(&seq_timer);
	695	return;
	696	}
	697	count += seq_time;
	698
	699	count -= jiffies;
	700
	701	if (count < 1)
	702	count = 1;
	703
	704	seq_timer.expires = (count) + jiffies;
	705	add_timer(&seq_timer);
	706	}
	707
	708	void sound_stop_timer(void)
	709	{
	710	del_timer(&seq_timer);
	711	}
	712
	713	void conf_printf(char name, struct address_info hw_config)
	714	{
	715	#ifndef CONFIG_SOUND_TRACEINIT
	716	return;
	717	#else
	718	printk("<%s> at 0x%03x", name, hw_config->io_base);
	719
	720	if (hw_config->irq)
	721	printk(" irq %d", (hw_config->irq > 0) ? hw_config->irq : -hw_config->irq);
	722
	723	if (hw_config->dma != -1 \|\| hw_config->dma2 != -1)
	724	{
	725	printk(" dma %d", hw_config->dma);
	726	if (hw_config->dma2 != -1)
	727	printk(",%d", hw_config->dma2);
	728	}
	729	printk("\n");
	730	#endif
	731	}
ece7f77b	732	EXPORT_SYMBOL(conf_printf);
1da177e4 LT	733
	734	void conf_printf2(char *name, int base, int irq, int dma, int dma2)
	735	{
	736	#ifndef CONFIG_SOUND_TRACEINIT
	737	return;
	738	#else
	739	printk("<%s> at 0x%03x", name, base);
	740
	741	if (irq)
	742	printk(" irq %d", (irq > 0) ? irq : -irq);
	743
	744	if (dma != -1 \|\| dma2 != -1)
	745	{
	746	printk(" dma %d", dma);
	747	if (dma2 != -1)
	748	printk(",%d", dma2);
	749	}
	750	printk("\n");
	751	#endif
	752	}
ece7f77b AB	753	EXPORT_SYMBOL(conf_printf2);
ece7f77b AB	754