1 /*********************************************************************
5 * Turtle Beach MultiSound Sound Card Driver for Linux
7 * Copyright (C) 1998 Andrew Veliath
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.
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.
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.
23 * $Id: msnd.c,v 1.17 1999/03/21 16:50:09 andrewtv Exp $
25 ********************************************************************/
27 #include <linux/version.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/slab.h>
31 #include <linux/vmalloc.h>
32 #include <linux/types.h>
33 #include <linux/delay.h>
35 #include <linux/init.h>
37 #include <asm/uaccess.h>
38 #include <linux/spinlock.h>
42 #define LOGNAME "msnd"
44 #define MSND_MAX_DEVS 4
46 static multisound_dev_t *devs[MSND_MAX_DEVS];
49 int __init msnd_register(multisound_dev_t *dev)
53 for (i = 0; i < MSND_MAX_DEVS; ++i)
57 if (i == MSND_MAX_DEVS)
68 void msnd_unregister(multisound_dev_t *dev)
72 for (i = 0; i < MSND_MAX_DEVS; ++i)
76 if (i == MSND_MAX_DEVS) {
77 printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
87 int msnd_get_num_devs(void)
92 multisound_dev_t *msnd_get_dev(int j)
96 for (i = 0; i < MSND_MAX_DEVS && j; ++i)
100 if (i == MSND_MAX_DEVS || j != 0)
106 void msnd_init_queue(unsigned long base, int start, int size)
108 isa_writew(PCTODSP_BASED(start), base + JQS_wStart);
109 isa_writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
110 isa_writew(0, base + JQS_wHead);
111 isa_writew(0, base + JQS_wTail);
114 void msnd_fifo_init(msnd_fifo *f)
119 void msnd_fifo_free(msnd_fifo *f)
127 int msnd_fifo_alloc(msnd_fifo *f, size_t n)
130 f->data = (char *)vmalloc(n);
142 void msnd_fifo_make_empty(msnd_fifo *f)
144 f->len = f->tail = f->head = 0;
147 int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len, int user)
154 while ((count < len) && (f->len != f->n)) {
158 if (f->head <= f->tail) {
159 nwritten = len - count;
160 if (nwritten > f->n - f->tail)
161 nwritten = f->n - f->tail;
164 nwritten = f->head - f->tail;
165 if (nwritten > len - count)
166 nwritten = len - count;
170 if (copy_from_user(f->data + f->tail, buf, nwritten))
173 isa_memcpy_fromio(f->data + f->tail, (unsigned long) buf, nwritten);
185 int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len, int user)
192 while ((count < len) && (f->len > 0)) {
196 if (f->tail <= f->head) {
198 if (nread > f->n - f->head)
199 nread = f->n - f->head;
202 nread = f->tail - f->head;
203 if (nread > len - count)
208 if (copy_to_user(buf, f->data + f->head, nread))
211 isa_memcpy_toio((unsigned long) buf, f->data + f->head, nread);
223 int msnd_wait_TXDE(multisound_dev_t *dev)
225 register unsigned int io = dev->io;
226 register int timeout = 1000;
229 if (inb(io + HP_ISR) & HPISR_TXDE)
235 int msnd_wait_HC0(multisound_dev_t *dev)
237 register unsigned int io = dev->io;
238 register int timeout = 1000;
241 if (!(inb(io + HP_CVR) & HPCVR_HC))
247 int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
251 spin_lock_irqsave(&dev->lock, flags);
252 if (msnd_wait_HC0(dev) == 0) {
253 outb(cmd, dev->io + HP_CVR);
254 spin_unlock_irqrestore(&dev->lock, flags);
257 spin_unlock_irqrestore(&dev->lock, flags);
259 printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");
264 int msnd_send_word(multisound_dev_t *dev, unsigned char high,
265 unsigned char mid, unsigned char low)
267 register unsigned int io = dev->io;
269 if (msnd_wait_TXDE(dev) == 0) {
270 outb(high, io + HP_TXH);
271 outb(mid, io + HP_TXM);
272 outb(low, io + HP_TXL);
276 printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");
281 int msnd_upload_host(multisound_dev_t *dev, char *bin, int len)
286 printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");
290 for (i = 0; i < len; i += 3)
291 if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
294 inb(dev->io + HP_RXL);
295 inb(dev->io + HP_CVR);
300 int msnd_enable_irq(multisound_dev_t *dev)
307 printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");
309 spin_lock_irqsave(&dev->lock, flags);
310 if (msnd_wait_TXDE(dev) == 0) {
311 outb(inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
312 if (dev->type == msndClassic)
313 outb(dev->irqid, dev->io + HP_IRQM);
314 outb(inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
315 outb(inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
316 enable_irq(dev->irq);
317 msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
318 spin_unlock_irqrestore(&dev->lock, flags);
321 spin_unlock_irqrestore(&dev->lock, flags);
323 printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");
328 int msnd_disable_irq(multisound_dev_t *dev)
332 if (--dev->irq_ref > 0)
335 if (dev->irq_ref < 0)
336 printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);
338 printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");
340 spin_lock_irqsave(&dev->lock, flags);
341 if (msnd_wait_TXDE(dev) == 0) {
342 outb(inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
343 if (dev->type == msndClassic)
344 outb(HPIRQ_NONE, dev->io + HP_IRQM);
345 disable_irq(dev->irq);
346 spin_unlock_irqrestore(&dev->lock, flags);
349 spin_unlock_irqrestore(&dev->lock, flags);
351 printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");
357 EXPORT_SYMBOL(msnd_register);
358 EXPORT_SYMBOL(msnd_unregister);
359 EXPORT_SYMBOL(msnd_get_num_devs);
360 EXPORT_SYMBOL(msnd_get_dev);
362 EXPORT_SYMBOL(msnd_init_queue);
364 EXPORT_SYMBOL(msnd_fifo_init);
365 EXPORT_SYMBOL(msnd_fifo_free);
366 EXPORT_SYMBOL(msnd_fifo_alloc);
367 EXPORT_SYMBOL(msnd_fifo_make_empty);
368 EXPORT_SYMBOL(msnd_fifo_write);
369 EXPORT_SYMBOL(msnd_fifo_read);
371 EXPORT_SYMBOL(msnd_wait_TXDE);
372 EXPORT_SYMBOL(msnd_wait_HC0);
373 EXPORT_SYMBOL(msnd_send_dsp_cmd);
374 EXPORT_SYMBOL(msnd_send_word);
375 EXPORT_SYMBOL(msnd_upload_host);
377 EXPORT_SYMBOL(msnd_enable_irq);
378 EXPORT_SYMBOL(msnd_disable_irq);
382 MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>");
383 MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base");
384 MODULE_LICENSE("GPL");
387 int init_module(void)
392 void cleanup_module(void)