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/module.h>
28 #include <linux/kernel.h>
29 #include <linux/slab.h>
30 #include <linux/vmalloc.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
34 #include <linux/init.h>
35 #include <linux/interrupt.h>
38 #include <asm/uaccess.h>
39 #include <linux/spinlock.h>
43 #define LOGNAME "msnd"
45 #define MSND_MAX_DEVS 4
47 static multisound_dev_t *devs[MSND_MAX_DEVS];
50 int __init msnd_register(multisound_dev_t *dev)
54 for (i = 0; i < MSND_MAX_DEVS; ++i)
58 if (i == MSND_MAX_DEVS)
66 void msnd_unregister(multisound_dev_t *dev)
70 for (i = 0; i < MSND_MAX_DEVS; ++i)
74 if (i == MSND_MAX_DEVS) {
75 printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
83 void msnd_init_queue(void __iomem *base, int start, int size)
85 writew(PCTODSP_BASED(start), base + JQS_wStart);
86 writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
87 writew(0, base + JQS_wHead);
88 writew(0, base + JQS_wTail);
91 void msnd_fifo_init(msnd_fifo *f)
96 void msnd_fifo_free(msnd_fifo *f)
104 int msnd_fifo_alloc(msnd_fifo *f, size_t n)
107 f->data = (char *)vmalloc(n);
119 void msnd_fifo_make_empty(msnd_fifo *f)
121 f->len = f->tail = f->head = 0;
124 int msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len)
128 while ((count < len) && (f->len != f->n)) {
132 if (f->head <= f->tail) {
133 nwritten = len - count;
134 if (nwritten > f->n - f->tail)
135 nwritten = f->n - f->tail;
138 nwritten = f->head - f->tail;
139 if (nwritten > len - count)
140 nwritten = len - count;
143 memcpy_fromio(f->data + f->tail, buf, nwritten);
155 int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len)
159 while ((count < len) && (f->len != f->n)) {
163 if (f->head <= f->tail) {
164 nwritten = len - count;
165 if (nwritten > f->n - f->tail)
166 nwritten = f->n - f->tail;
169 nwritten = f->head - f->tail;
170 if (nwritten > len - count)
171 nwritten = len - count;
174 memcpy(f->data + f->tail, buf, nwritten);
186 int msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len)
190 while ((count < len) && (f->len > 0)) {
194 if (f->tail <= f->head) {
196 if (nread > f->n - f->head)
197 nread = f->n - f->head;
200 nread = f->tail - f->head;
201 if (nread > len - count)
205 memcpy_toio(buf, f->data + f->head, nread);
217 int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len)
221 while ((count < len) && (f->len > 0)) {
225 if (f->tail <= f->head) {
227 if (nread > f->n - f->head)
228 nread = f->n - f->head;
231 nread = f->tail - f->head;
232 if (nread > len - count)
236 memcpy(buf, f->data + f->head, nread);
248 static int msnd_wait_TXDE(multisound_dev_t *dev)
250 register unsigned int io = dev->io;
251 register int timeout = 1000;
254 if (msnd_inb(io + HP_ISR) & HPISR_TXDE)
260 static int msnd_wait_HC0(multisound_dev_t *dev)
262 register unsigned int io = dev->io;
263 register int timeout = 1000;
266 if (!(msnd_inb(io + HP_CVR) & HPCVR_HC))
272 int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
276 spin_lock_irqsave(&dev->lock, flags);
277 if (msnd_wait_HC0(dev) == 0) {
278 msnd_outb(cmd, dev->io + HP_CVR);
279 spin_unlock_irqrestore(&dev->lock, flags);
282 spin_unlock_irqrestore(&dev->lock, flags);
284 printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");
289 int msnd_send_word(multisound_dev_t *dev, unsigned char high,
290 unsigned char mid, unsigned char low)
292 register unsigned int io = dev->io;
294 if (msnd_wait_TXDE(dev) == 0) {
295 msnd_outb(high, io + HP_TXH);
296 msnd_outb(mid, io + HP_TXM);
297 msnd_outb(low, io + HP_TXL);
301 printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");
306 int msnd_upload_host(multisound_dev_t *dev, char *bin, int len)
311 printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");
315 for (i = 0; i < len; i += 3)
316 if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
319 msnd_inb(dev->io + HP_RXL);
320 msnd_inb(dev->io + HP_CVR);
325 int msnd_enable_irq(multisound_dev_t *dev)
332 printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");
334 spin_lock_irqsave(&dev->lock, flags);
335 if (msnd_wait_TXDE(dev) == 0) {
336 msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
337 if (dev->type == msndClassic)
338 msnd_outb(dev->irqid, dev->io + HP_IRQM);
339 msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
340 msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
341 enable_irq(dev->irq);
342 msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
343 spin_unlock_irqrestore(&dev->lock, flags);
346 spin_unlock_irqrestore(&dev->lock, flags);
348 printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");
353 int msnd_disable_irq(multisound_dev_t *dev)
357 if (--dev->irq_ref > 0)
360 if (dev->irq_ref < 0)
361 printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);
363 printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");
365 spin_lock_irqsave(&dev->lock, flags);
366 if (msnd_wait_TXDE(dev) == 0) {
367 msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
368 if (dev->type == msndClassic)
369 msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM);
370 disable_irq(dev->irq);
371 spin_unlock_irqrestore(&dev->lock, flags);
374 spin_unlock_irqrestore(&dev->lock, flags);
376 printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");
382 EXPORT_SYMBOL(msnd_register);
383 EXPORT_SYMBOL(msnd_unregister);
385 EXPORT_SYMBOL(msnd_init_queue);
387 EXPORT_SYMBOL(msnd_fifo_init);
388 EXPORT_SYMBOL(msnd_fifo_free);
389 EXPORT_SYMBOL(msnd_fifo_alloc);
390 EXPORT_SYMBOL(msnd_fifo_make_empty);
391 EXPORT_SYMBOL(msnd_fifo_write_io);
392 EXPORT_SYMBOL(msnd_fifo_read_io);
393 EXPORT_SYMBOL(msnd_fifo_write);
394 EXPORT_SYMBOL(msnd_fifo_read);
396 EXPORT_SYMBOL(msnd_send_dsp_cmd);
397 EXPORT_SYMBOL(msnd_send_word);
398 EXPORT_SYMBOL(msnd_upload_host);
400 EXPORT_SYMBOL(msnd_enable_irq);
401 EXPORT_SYMBOL(msnd_disable_irq);
405 MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>");
406 MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base");
407 MODULE_LICENSE("GPL");
410 int init_module(void)
415 void cleanup_module(void)