[linux-block.git] / sound / oss / msnd.c

/*********************************************************************
 *
 * msnd.c - Driver Base
 *
 * Turtle Beach MultiSound Sound Card Driver for Linux
 *
 * Copyright (C) 1998 Andrew Veliath
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 ********************************************************************/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/interrupt.h>

#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/spinlock.h>
#include <asm/irq.h>
#include "msnd.h"

#define LOGNAME			"msnd"

#define MSND_MAX_DEVS		4

static multisound_dev_t		*devs[MSND_MAX_DEVS];
static int			num_devs;

int msnd_register(multisound_dev_t *dev)
{
	int i;

	for (i = 0; i < MSND_MAX_DEVS; ++i)
		if (devs[i] == NULL)
			break;

	if (i == MSND_MAX_DEVS)
		return -ENOMEM;

	devs[i] = dev;
	++num_devs;
	return 0;
}

void msnd_unregister(multisound_dev_t *dev)
{
	int i;

	for (i = 0; i < MSND_MAX_DEVS; ++i)
		if (devs[i] == dev)
			break;

	if (i == MSND_MAX_DEVS) {
		printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
		return;
	}

	devs[i] = NULL;
	--num_devs;
}

void msnd_init_queue(void __iomem *base, int start, int size)
{
	writew(PCTODSP_BASED(start), base + JQS_wStart);
	writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
	writew(0, base + JQS_wHead);
	writew(0, base + JQS_wTail);
}

void msnd_fifo_init(msnd_fifo *f)
{
	f->data = NULL;
}

void msnd_fifo_free(msnd_fifo *f)
{
	vfree(f->data);
	f->data = NULL;
}

int msnd_fifo_alloc(msnd_fifo *f, size_t n)
{
	msnd_fifo_free(f);
	f->data = vmalloc(n);
	f->n = n;
	f->tail = 0;
	f->head = 0;
	f->len = 0;

	if (!f->data)
		return -ENOMEM;

	return 0;
}

void msnd_fifo_make_empty(msnd_fifo *f)
{
	f->len = f->tail = f->head = 0;
}

int msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len)
{
	int count = 0;

	while ((count < len) && (f->len != f->n)) {

		int nwritten;

		if (f->head <= f->tail) {
			nwritten = len - count;
			if (nwritten > f->n - f->tail)
				nwritten = f->n - f->tail;
		}
		else {
			nwritten = f->head - f->tail;
			if (nwritten > len - count)
				nwritten = len - count;
		}

		memcpy_fromio(f->data + f->tail, buf, nwritten);

		count += nwritten;
		buf += nwritten;
		f->len += nwritten;
		f->tail += nwritten;
		f->tail %= f->n;
	}

	return count;
}

int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len)
{
	int count = 0;

	while ((count < len) && (f->len != f->n)) {

		int nwritten;

		if (f->head <= f->tail) {
			nwritten = len - count;
			if (nwritten > f->n - f->tail)
				nwritten = f->n - f->tail;
		}
		else {
			nwritten = f->head - f->tail;
			if (nwritten > len - count)
				nwritten = len - count;
		}

		memcpy(f->data + f->tail, buf, nwritten);

		count += nwritten;
		buf += nwritten;
		f->len += nwritten;
		f->tail += nwritten;
		f->tail %= f->n;
	}

	return count;
}

int msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len)
{
	int count = 0;

	while ((count < len) && (f->len > 0)) {

		int nread;

		if (f->tail <= f->head) {
			nread = len - count;
			if (nread > f->n - f->head)
				nread = f->n - f->head;
		}
		else {
			nread = f->tail - f->head;
			if (nread > len - count)
				nread = len - count;
		}

		memcpy_toio(buf, f->data + f->head, nread);

		count += nread;
		buf += nread;
		f->len -= nread;
		f->head += nread;
		f->head %= f->n;
	}

	return count;
}

int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len)
{
	int count = 0;

	while ((count < len) && (f->len > 0)) {

		int nread;

		if (f->tail <= f->head) {
			nread = len - count;
			if (nread > f->n - f->head)
				nread = f->n - f->head;
		}
		else {
			nread = f->tail - f->head;
			if (nread > len - count)
				nread = len - count;
		}

		memcpy(buf, f->data + f->head, nread);

		count += nread;
		buf += nread;
		f->len -= nread;
		f->head += nread;
		f->head %= f->n;
	}

	return count;
}

static int msnd_wait_TXDE(multisound_dev_t *dev)
{
	register unsigned int io = dev->io;
	register int timeout = 1000;
    
	while(timeout-- > 0)
		if (msnd_inb(io + HP_ISR) & HPISR_TXDE)
			return 0;

	return -EIO;
}

static int msnd_wait_HC0(multisound_dev_t *dev)
{
	register unsigned int io = dev->io;
	register int timeout = 1000;

	while(timeout-- > 0)
		if (!(msnd_inb(io + HP_CVR) & HPCVR_HC))
			return 0;

	return -EIO;
}

int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
{
	unsigned long flags;

	spin_lock_irqsave(&dev->lock, flags);
	if (msnd_wait_HC0(dev) == 0) {
		msnd_outb(cmd, dev->io + HP_CVR);
		spin_unlock_irqrestore(&dev->lock, flags);
		return 0;
	}
	spin_unlock_irqrestore(&dev->lock, flags);

	printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");

	return -EIO;
}

int msnd_send_word(multisound_dev_t *dev, unsigned char high,
		   unsigned char mid, unsigned char low)
{
	register unsigned int io = dev->io;

	if (msnd_wait_TXDE(dev) == 0) {
		msnd_outb(high, io + HP_TXH);
		msnd_outb(mid, io + HP_TXM);
		msnd_outb(low, io + HP_TXL);
		return 0;
	}

	printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");

	return -EIO;
}

int msnd_upload_host(multisound_dev_t *dev, char *bin, int len)
{
	int i;

	if (len % 3 != 0) {
		printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");		
		return -EINVAL;
	}

	for (i = 0; i < len; i += 3)
		if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
			return -EIO;

	msnd_inb(dev->io + HP_RXL);
	msnd_inb(dev->io + HP_CVR);

	return 0;
}

int msnd_enable_irq(multisound_dev_t *dev)
{
	unsigned long flags;

	if (dev->irq_ref++)
		return 0;

	printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");

	spin_lock_irqsave(&dev->lock, flags);
	if (msnd_wait_TXDE(dev) == 0) {
		msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
		if (dev->type == msndClassic)
			msnd_outb(dev->irqid, dev->io + HP_IRQM);
		msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
		msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
		enable_irq(dev->irq);
		msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
		spin_unlock_irqrestore(&dev->lock, flags);
		return 0;
	}
	spin_unlock_irqrestore(&dev->lock, flags);

	printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");

	return -EIO;
}

int msnd_disable_irq(multisound_dev_t *dev)
{
	unsigned long flags;

	if (--dev->irq_ref > 0)
		return 0;

	if (dev->irq_ref < 0)
		printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);

	printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");

	spin_lock_irqsave(&dev->lock, flags);
	if (msnd_wait_TXDE(dev) == 0) {
		msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
		if (dev->type == msndClassic)
			msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM);
		disable_irq(dev->irq);
		spin_unlock_irqrestore(&dev->lock, flags);
		return 0;
	}
	spin_unlock_irqrestore(&dev->lock, flags);

	printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");

	return -EIO;
}

#ifndef LINUX20
EXPORT_SYMBOL(msnd_register);
EXPORT_SYMBOL(msnd_unregister);

EXPORT_SYMBOL(msnd_init_queue);

EXPORT_SYMBOL(msnd_fifo_init);
EXPORT_SYMBOL(msnd_fifo_free);
EXPORT_SYMBOL(msnd_fifo_alloc);
EXPORT_SYMBOL(msnd_fifo_make_empty);
EXPORT_SYMBOL(msnd_fifo_write_io);
EXPORT_SYMBOL(msnd_fifo_read_io);
EXPORT_SYMBOL(msnd_fifo_write);
EXPORT_SYMBOL(msnd_fifo_read);

EXPORT_SYMBOL(msnd_send_dsp_cmd);
EXPORT_SYMBOL(msnd_send_word);
EXPORT_SYMBOL(msnd_upload_host);

EXPORT_SYMBOL(msnd_enable_irq);
EXPORT_SYMBOL(msnd_disable_irq);
#endif

#ifdef MODULE
MODULE_AUTHOR				("Andrew Veliath <andrewtv@usa.net>");
MODULE_DESCRIPTION			("Turtle Beach MultiSound Driver Base");
MODULE_LICENSE("GPL");


int init_module(void)
{
	return 0;
}

void cleanup_module(void)
{
}
#endif
Commit	Line	Data
1da177e4 LT	1	/*********************************************************************
	2	*
	3	* msnd.c - Driver Base
	4	*
	5	* Turtle Beach MultiSound Sound Card Driver for Linux
	6	*
	7	* Copyright (C) 1998 Andrew Veliath
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22	*
1da177e4 LT	23	********************************************************************/
1da177e4 LT	24
1da177e4 LT	25	#include <linux/module.h>
	26	#include <linux/kernel.h>
	27	#include <linux/slab.h>
	28	#include <linux/vmalloc.h>
	29	#include <linux/types.h>
	30	#include <linux/delay.h>
	31	#include <linux/mm.h>
	32	#include <linux/init.h>
	33	#include <linux/interrupt.h>
	34
	35	#include <asm/io.h>
	36	#include <asm/uaccess.h>
	37	#include <linux/spinlock.h>
	38	#include <asm/irq.h>
	39	#include "msnd.h"
	40
	41	#define LOGNAME "msnd"
	42
	43	#define MSND_MAX_DEVS 4
	44
	45	static multisound_dev_t *devs[MSND_MAX_DEVS];
	46	static int num_devs;
	47
a2926b14	48	int msnd_register(multisound_dev_t *dev)
1da177e4 LT	49	{
	50	int i;
	51
	52	for (i = 0; i < MSND_MAX_DEVS; ++i)
	53	if (devs[i] == NULL)
	54	break;
	55
	56	if (i == MSND_MAX_DEVS)
	57	return -ENOMEM;
	58
	59	devs[i] = dev;
	60	++num_devs;
	61	return 0;
	62	}
	63
	64	void msnd_unregister(multisound_dev_t *dev)
	65	{
	66	int i;
	67
	68	for (i = 0; i < MSND_MAX_DEVS; ++i)
	69	if (devs[i] == dev)
	70	break;
	71
	72	if (i == MSND_MAX_DEVS) {
	73	printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
	74	return;
	75	}
	76
	77	devs[i] = NULL;
	78	--num_devs;
	79	}
	80
	81	void msnd_init_queue(void __iomem *base, int start, int size)
	82	{
	83	writew(PCTODSP_BASED(start), base + JQS_wStart);
	84	writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
	85	writew(0, base + JQS_wHead);
	86	writew(0, base + JQS_wTail);
	87	}
	88
	89	void msnd_fifo_init(msnd_fifo *f)
	90	{
	91	f->data = NULL;
	92	}
	93
	94	void msnd_fifo_free(msnd_fifo *f)
	95	{
ca43b317 JJ	96	vfree(f->data);
ca43b317 JJ	97	f->data = NULL;
1da177e4 LT	98	}
	99
	100	int msnd_fifo_alloc(msnd_fifo *f, size_t n)
	101	{
	102	msnd_fifo_free(f);
1944df6b	103	f->data = vmalloc(n);
1da177e4 LT	104	f->n = n;
	105	f->tail = 0;
	106	f->head = 0;
	107	f->len = 0;
	108
	109	if (!f->data)
	110	return -ENOMEM;
	111
	112	return 0;
	113	}
	114
	115	void msnd_fifo_make_empty(msnd_fifo *f)
	116	{
	117	f->len = f->tail = f->head = 0;
	118	}
	119
	120	int msnd_fifo_write_io(msnd_fifo f, char __iomem buf, size_t len)
	121	{
	122	int count = 0;
	123
	124	while ((count < len) && (f->len != f->n)) {
	125
	126	int nwritten;
	127
	128	if (f->head <= f->tail) {
	129	nwritten = len - count;
	130	if (nwritten > f->n - f->tail)
	131	nwritten = f->n - f->tail;
	132	}
	133	else {
	134	nwritten = f->head - f->tail;
	135	if (nwritten > len - count)
	136	nwritten = len - count;
	137	}
	138
	139	memcpy_fromio(f->data + f->tail, buf, nwritten);
	140
	141	count += nwritten;
	142	buf += nwritten;
	143	f->len += nwritten;
	144	f->tail += nwritten;
	145	f->tail %= f->n;
	146	}
	147
	148	return count;
	149	}
	150
	151	int msnd_fifo_write(msnd_fifo f, const char buf, size_t len)
	152	{
	153	int count = 0;
	154
	155	while ((count < len) && (f->len != f->n)) {
	156
	157	int nwritten;
	158
	159	if (f->head <= f->tail) {
	160	nwritten = len - count;
	161	if (nwritten > f->n - f->tail)
	162	nwritten = f->n - f->tail;
	163	}
	164	else {
	165	nwritten = f->head - f->tail;
	166	if (nwritten > len - count)
	167	nwritten = len - count;
168	}
169
170	memcpy(f->data + f->tail, buf, nwritten);
171
172	count += nwritten;
173	buf += nwritten;
174	f->len += nwritten;
175	f->tail += nwritten;
176	f->tail %= f->n;
177	}
178
179	return count;
180	}
181
182	int msnd_fifo_read_io(msnd_fifo f, char __iomem buf, size_t len)
183	{
184	int count = 0;
185
186	while ((count < len) && (f->len > 0)) {
187
188	int nread;
189
190	if (f->tail <= f->head) {
191	nread = len - count;
192	if (nread > f->n - f->head)
193	nread = f->n - f->head;
194	}
195	else {
196	nread = f->tail - f->head;
197	if (nread > len - count)
198	nread = len - count;
199	}
200
201	memcpy_toio(buf, f->data + f->head, nread);
202
203	count += nread;
204	buf += nread;
205	f->len -= nread;
206	f->head += nread;
207	f->head %= f->n;
208	}
209
210	return count;
211	}
212
213	int msnd_fifo_read(msnd_fifo f, char buf, size_t len)
214	{
215	int count = 0;
216
217	while ((count < len) && (f->len > 0)) {
218
219	int nread;
220
221	if (f->tail <= f->head) {
222	nread = len - count;
223	if (nread > f->n - f->head)
224	nread = f->n - f->head;
225	}
226	else {
227	nread = f->tail - f->head;
228	if (nread > len - count)
229	nread = len - count;
230	}
231
232	memcpy(buf, f->data + f->head, nread);
233
234	count += nread;
235	buf += nread;
236	f->len -= nread;
237	f->head += nread;
238	f->head %= f->n;
239	}
240
241	return count;
242	}
243
244	static int msnd_wait_TXDE(multisound_dev_t *dev)
245	{
246	register unsigned int io = dev->io;
247	register int timeout = 1000;
248
249	while(timeout-- > 0)
250	if (msnd_inb(io + HP_ISR) & HPISR_TXDE)
251	return 0;
252
253	return -EIO;
254	}
255
256	static int msnd_wait_HC0(multisound_dev_t *dev)
257	{
258	register unsigned int io = dev->io;
259	register int timeout = 1000;
260
261	while(timeout-- > 0)
262	if (!(msnd_inb(io + HP_CVR) & HPCVR_HC))
263	return 0;
264
265	return -EIO;
266	}
267
268	int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
269	{
270	unsigned long flags;
271
272	spin_lock_irqsave(&dev->lock, flags);
273	if (msnd_wait_HC0(dev) == 0) {
274	msnd_outb(cmd, dev->io + HP_CVR);
275	spin_unlock_irqrestore(&dev->lock, flags);
276	return 0;
277	}
278	spin_unlock_irqrestore(&dev->lock, flags);
279
280	printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");
281
282	return -EIO;
283	}
284
285	int msnd_send_word(multisound_dev_t *dev, unsigned char high,
286	unsigned char mid, unsigned char low)
287	{
288	register unsigned int io = dev->io;
289
290	if (msnd_wait_TXDE(dev) == 0) {
291	msnd_outb(high, io + HP_TXH);
292	msnd_outb(mid, io + HP_TXM);
293	msnd_outb(low, io + HP_TXL);
294	return 0;
295	}
296
297	printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");
298
299	return -EIO;
300	}
301
302	int msnd_upload_host(multisound_dev_t dev, char bin, int len)
303	{
304	int i;
305
306	if (len % 3 != 0) {
307	printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");
308	return -EINVAL;
309	}
310
311	for (i = 0; i < len; i += 3)
312	if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
313	return -EIO;
314
315	msnd_inb(dev->io + HP_RXL);
316	msnd_inb(dev->io + HP_CVR);
317
318	return 0;
319	}
320
321	int msnd_enable_irq(multisound_dev_t *dev)
322	{
323	unsigned long flags;
324
325	if (dev->irq_ref++)
326	return 0;
327
328	printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");
329
330	spin_lock_irqsave(&dev->lock, flags);
331	if (msnd_wait_TXDE(dev) == 0) {
332	msnd_outb(msnd_inb(dev->io + HP_ICR) \| HPICR_TREQ, dev->io + HP_ICR);
333	if (dev->type == msndClassic)
334	msnd_outb(dev->irqid, dev->io + HP_IRQM);
335	msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
336	msnd_outb(msnd_inb(dev->io + HP_ICR) \| HPICR_RREQ, dev->io + HP_ICR);
337	enable_irq(dev->irq);
338	msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
339	spin_unlock_irqrestore(&dev->lock, flags);
340	return 0;
341	}
342	spin_unlock_irqrestore(&dev->lock, flags);
343
344	printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");
345
346	return -EIO;
347	}
348
349	int msnd_disable_irq(multisound_dev_t *dev)
350	{
351	unsigned long flags;
352
353	if (--dev->irq_ref > 0)
354	return 0;
355
356	if (dev->irq_ref < 0)
357	printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);
358
359	printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");
360
361	spin_lock_irqsave(&dev->lock, flags);
362	if (msnd_wait_TXDE(dev) == 0) {
363	msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
364	if (dev->type == msndClassic)
365	msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM);
366	disable_irq(dev->irq);
367	spin_unlock_irqrestore(&dev->lock, flags);
368	return 0;
369	}
370	spin_unlock_irqrestore(&dev->lock, flags);
371
372	printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");
373
374	return -EIO;
375	}
376
377	#ifndef LINUX20
378	EXPORT_SYMBOL(msnd_register);
379	EXPORT_SYMBOL(msnd_unregister);
380
381	EXPORT_SYMBOL(msnd_init_queue);
382
383	EXPORT_SYMBOL(msnd_fifo_init);
384	EXPORT_SYMBOL(msnd_fifo_free);
385	EXPORT_SYMBOL(msnd_fifo_alloc);
386	EXPORT_SYMBOL(msnd_fifo_make_empty);
387	EXPORT_SYMBOL(msnd_fifo_write_io);
388	EXPORT_SYMBOL(msnd_fifo_read_io);
389	EXPORT_SYMBOL(msnd_fifo_write);
390	EXPORT_SYMBOL(msnd_fifo_read);
391
392	EXPORT_SYMBOL(msnd_send_dsp_cmd);
393	EXPORT_SYMBOL(msnd_send_word);
394	EXPORT_SYMBOL(msnd_upload_host);
395
396	EXPORT_SYMBOL(msnd_enable_irq);
397	EXPORT_SYMBOL(msnd_disable_irq);
398	#endif
399
400	#ifdef MODULE
401	MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>");
402	MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base");
403	MODULE_LICENSE("GPL");
404
405
406	int init_module(void)
407	{
408	return 0;
409	}
410
411	void cleanup_module(void)
412	{
413	}
414	#endif