[linux.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/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 <[email protected]>");
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>
1da177e4 LT	26	#include <linux/kernel.h>
1da177e4 LT	27	#include <linux/vmalloc.h>
	28	#include <linux/types.h>
	29	#include <linux/delay.h>
	30	#include <linux/mm.h>
	31	#include <linux/init.h>
	32	#include <linux/interrupt.h>
	33
	34	#include <asm/io.h>
	35	#include <asm/uaccess.h>
	36	#include <linux/spinlock.h>
	37	#include <asm/irq.h>
	38	#include "msnd.h"
	39
	40	#define LOGNAME "msnd"
	41
	42	#define MSND_MAX_DEVS 4
	43
	44	static multisound_dev_t *devs[MSND_MAX_DEVS];
	45	static int num_devs;
	46
a2926b14	47	int msnd_register(multisound_dev_t *dev)
1da177e4 LT	48	{
	49	int i;
	50
	51	for (i = 0; i < MSND_MAX_DEVS; ++i)
	52	if (devs[i] == NULL)
	53	break;
	54
	55	if (i == MSND_MAX_DEVS)
	56	return -ENOMEM;
	57
	58	devs[i] = dev;
	59	++num_devs;
	60	return 0;
	61	}
	62
	63	void msnd_unregister(multisound_dev_t *dev)
	64	{
	65	int i;
	66
	67	for (i = 0; i < MSND_MAX_DEVS; ++i)
	68	if (devs[i] == dev)
	69	break;
	70
	71	if (i == MSND_MAX_DEVS) {
	72	printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
	73	return;
	74	}
	75
	76	devs[i] = NULL;
	77	--num_devs;
	78	}
	79
	80	void msnd_init_queue(void __iomem *base, int start, int size)
	81	{
	82	writew(PCTODSP_BASED(start), base + JQS_wStart);
	83	writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
	84	writew(0, base + JQS_wHead);
	85	writew(0, base + JQS_wTail);
	86	}
	87
	88	void msnd_fifo_init(msnd_fifo *f)
	89	{
	90	f->data = NULL;
	91	}
	92
	93	void msnd_fifo_free(msnd_fifo *f)
	94	{
ca43b317 JJ	95	vfree(f->data);
ca43b317 JJ	96	f->data = NULL;
1da177e4 LT	97	}
	98
	99	int msnd_fifo_alloc(msnd_fifo *f, size_t n)
	100	{
	101	msnd_fifo_free(f);
1944df6b	102	f->data = vmalloc(n);
1da177e4 LT	103	f->n = n;
	104	f->tail = 0;
	105	f->head = 0;
	106	f->len = 0;
	107
	108	if (!f->data)
	109	return -ENOMEM;
	110
	111	return 0;
	112	}
	113
	114	void msnd_fifo_make_empty(msnd_fifo *f)
	115	{
	116	f->len = f->tail = f->head = 0;
	117	}
	118
	119	int msnd_fifo_write_io(msnd_fifo f, char __iomem buf, size_t len)
	120	{
	121	int count = 0;
	122
	123	while ((count < len) && (f->len != f->n)) {
	124
	125	int nwritten;
	126
	127	if (f->head <= f->tail) {
	128	nwritten = len - count;
	129	if (nwritten > f->n - f->tail)
	130	nwritten = f->n - f->tail;
	131	}
	132	else {
	133	nwritten = f->head - f->tail;
	134	if (nwritten > len - count)
	135	nwritten = len - count;
	136	}
	137
	138	memcpy_fromio(f->data + f->tail, buf, nwritten);
	139
	140	count += nwritten;
	141	buf += nwritten;
	142	f->len += nwritten;
	143	f->tail += nwritten;
	144	f->tail %= f->n;
	145	}
	146
	147	return count;
	148	}
	149
	150	int msnd_fifo_write(msnd_fifo f, const char buf, size_t len)
	151	{
	152	int count = 0;
	153
	154	while ((count < len) && (f->len != f->n)) {
	155
	156	int nwritten;
	157
	158	if (f->head <= f->tail) {
	159	nwritten = len - count;
	160	if (nwritten > f->n - f->tail)
	161	nwritten = f->n - f->tail;
	162	}
	163	else {
	164	nwritten = f->head - f->tail;
	165	if (nwritten > len - count)
	166	nwritten = len - count;
167	}
168
169	memcpy(f->data + f->tail, buf, nwritten);
170
171	count += nwritten;
172	buf += nwritten;
173	f->len += nwritten;
174	f->tail += nwritten;
175	f->tail %= f->n;
176	}
177
178	return count;
179	}
180
181	int msnd_fifo_read_io(msnd_fifo f, char __iomem buf, size_t len)
182	{
183	int count = 0;
184
185	while ((count < len) && (f->len > 0)) {
186
187	int nread;
188
189	if (f->tail <= f->head) {
190	nread = len - count;
191	if (nread > f->n - f->head)
192	nread = f->n - f->head;
193	}
194	else {
195	nread = f->tail - f->head;
196	if (nread > len - count)
197	nread = len - count;
198	}
199
200	memcpy_toio(buf, f->data + f->head, nread);
201
202	count += nread;
203	buf += nread;
204	f->len -= nread;
205	f->head += nread;
206	f->head %= f->n;
207	}
208
209	return count;
210	}
211
212	int msnd_fifo_read(msnd_fifo f, char buf, size_t len)
213	{
214	int count = 0;
215
216	while ((count < len) && (f->len > 0)) {
217
218	int nread;
219
220	if (f->tail <= f->head) {
221	nread = len - count;
222	if (nread > f->n - f->head)
223	nread = f->n - f->head;
224	}
225	else {
226	nread = f->tail - f->head;
227	if (nread > len - count)
228	nread = len - count;
229	}
230
231	memcpy(buf, f->data + f->head, nread);
232
233	count += nread;
234	buf += nread;
235	f->len -= nread;
236	f->head += nread;
237	f->head %= f->n;
238	}
239
240	return count;
241	}
242
243	static int msnd_wait_TXDE(multisound_dev_t *dev)
244	{
245	register unsigned int io = dev->io;
246	register int timeout = 1000;
247
248	while(timeout-- > 0)
249	if (msnd_inb(io + HP_ISR) & HPISR_TXDE)
250	return 0;
251
252	return -EIO;
253	}
254
255	static int msnd_wait_HC0(multisound_dev_t *dev)
256	{
257	register unsigned int io = dev->io;
258	register int timeout = 1000;
259
260	while(timeout-- > 0)
261	if (!(msnd_inb(io + HP_CVR) & HPCVR_HC))
262	return 0;
263
264	return -EIO;
265	}
266
267	int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
268	{
269	unsigned long flags;
270
271	spin_lock_irqsave(&dev->lock, flags);
272	if (msnd_wait_HC0(dev) == 0) {
273	msnd_outb(cmd, dev->io + HP_CVR);
274	spin_unlock_irqrestore(&dev->lock, flags);
275	return 0;
276	}
277	spin_unlock_irqrestore(&dev->lock, flags);
278
279	printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");
280
281	return -EIO;
282	}
283
284	int msnd_send_word(multisound_dev_t *dev, unsigned char high,
285	unsigned char mid, unsigned char low)
286	{
287	register unsigned int io = dev->io;
288
289	if (msnd_wait_TXDE(dev) == 0) {
290	msnd_outb(high, io + HP_TXH);
291	msnd_outb(mid, io + HP_TXM);
292	msnd_outb(low, io + HP_TXL);
293	return 0;
294	}
295
296	printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");
297
298	return -EIO;
299	}
300
301	int msnd_upload_host(multisound_dev_t dev, char bin, int len)
302	{
303	int i;
304
305	if (len % 3 != 0) {
306	printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");
307	return -EINVAL;
308	}
309
310	for (i = 0; i < len; i += 3)
311	if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
312	return -EIO;
313
314	msnd_inb(dev->io + HP_RXL);
315	msnd_inb(dev->io + HP_CVR);
316
317	return 0;
318	}
319
320	int msnd_enable_irq(multisound_dev_t *dev)
321	{
322	unsigned long flags;
323
324	if (dev->irq_ref++)
325	return 0;
326
327	printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");
328
329	spin_lock_irqsave(&dev->lock, flags);
330	if (msnd_wait_TXDE(dev) == 0) {
331	msnd_outb(msnd_inb(dev->io + HP_ICR) \| HPICR_TREQ, dev->io + HP_ICR);
332	if (dev->type == msndClassic)
333	msnd_outb(dev->irqid, dev->io + HP_IRQM);
334	msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
335	msnd_outb(msnd_inb(dev->io + HP_ICR) \| HPICR_RREQ, dev->io + HP_ICR);
336	enable_irq(dev->irq);
337	msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
338	spin_unlock_irqrestore(&dev->lock, flags);
339	return 0;
340	}
341	spin_unlock_irqrestore(&dev->lock, flags);
342
343	printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");
344
345	return -EIO;
346	}
347
348	int msnd_disable_irq(multisound_dev_t *dev)
349	{
350	unsigned long flags;
351
352	if (--dev->irq_ref > 0)
353	return 0;
354
355	if (dev->irq_ref < 0)
356	printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);
357
358	printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");
359
360	spin_lock_irqsave(&dev->lock, flags);
361	if (msnd_wait_TXDE(dev) == 0) {
362	msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
363	if (dev->type == msndClassic)
364	msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM);
365	disable_irq(dev->irq);
366	spin_unlock_irqrestore(&dev->lock, flags);
367	return 0;
368	}
369	spin_unlock_irqrestore(&dev->lock, flags);
370
371	printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");
372
373	return -EIO;
374	}
375
376	#ifndef LINUX20
377	EXPORT_SYMBOL(msnd_register);
378	EXPORT_SYMBOL(msnd_unregister);
379
380	EXPORT_SYMBOL(msnd_init_queue);
381
382	EXPORT_SYMBOL(msnd_fifo_init);
383	EXPORT_SYMBOL(msnd_fifo_free);
384	EXPORT_SYMBOL(msnd_fifo_alloc);
385	EXPORT_SYMBOL(msnd_fifo_make_empty);
386	EXPORT_SYMBOL(msnd_fifo_write_io);
387	EXPORT_SYMBOL(msnd_fifo_read_io);
388	EXPORT_SYMBOL(msnd_fifo_write);
389	EXPORT_SYMBOL(msnd_fifo_read);
390
391	EXPORT_SYMBOL(msnd_send_dsp_cmd);
392	EXPORT_SYMBOL(msnd_send_word);
393	EXPORT_SYMBOL(msnd_upload_host);
394
395	EXPORT_SYMBOL(msnd_enable_irq);
396	EXPORT_SYMBOL(msnd_disable_irq);
397	#endif
398
399	#ifdef MODULE
400	MODULE_AUTHOR ("Andrew Veliath <[email protected]>");
401	MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base");
402	MODULE_LICENSE("GPL");
403
404
405	int init_module(void)
406	{
407	return 0;
408	}
409
410	void cleanup_module(void)
411	{
412	}
413	#endif