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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/oss/msnd.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'sound/oss/msnd.c')
-rw-r--r--sound/oss/msnd.c419
1 files changed, 419 insertions, 0 deletions
diff --git a/sound/oss/msnd.c b/sound/oss/msnd.c
new file mode 100644
index 000000000000..4f1ff1bccdce
--- /dev/null
+++ b/sound/oss/msnd.c
@@ -0,0 +1,419 @@
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 *
23 * $Id: msnd.c,v 1.17 1999/03/21 16:50:09 andrewtv Exp $
24 *
25 ********************************************************************/
26
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>
34#include <linux/mm.h>
35#include <linux/init.h>
36#include <linux/interrupt.h>
37
38#include <asm/io.h>
39#include <asm/uaccess.h>
40#include <linux/spinlock.h>
41#include <asm/irq.h>
42#include "msnd.h"
43
44#define LOGNAME "msnd"
45
46#define MSND_MAX_DEVS 4
47
48static multisound_dev_t *devs[MSND_MAX_DEVS];
49static int num_devs;
50
51int __init msnd_register(multisound_dev_t *dev)
52{
53 int i;
54
55 for (i = 0; i < MSND_MAX_DEVS; ++i)
56 if (devs[i] == NULL)
57 break;
58
59 if (i == MSND_MAX_DEVS)
60 return -ENOMEM;
61
62 devs[i] = dev;
63 ++num_devs;
64 return 0;
65}
66
67void msnd_unregister(multisound_dev_t *dev)
68{
69 int i;
70
71 for (i = 0; i < MSND_MAX_DEVS; ++i)
72 if (devs[i] == dev)
73 break;
74
75 if (i == MSND_MAX_DEVS) {
76 printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
77 return;
78 }
79
80 devs[i] = NULL;
81 --num_devs;
82}
83
84void msnd_init_queue(void __iomem *base, int start, int size)
85{
86 writew(PCTODSP_BASED(start), base + JQS_wStart);
87 writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
88 writew(0, base + JQS_wHead);
89 writew(0, base + JQS_wTail);
90}
91
92void msnd_fifo_init(msnd_fifo *f)
93{
94 f->data = NULL;
95}
96
97void msnd_fifo_free(msnd_fifo *f)
98{
99 if (f->data) {
100 vfree(f->data);
101 f->data = NULL;
102 }
103}
104
105int msnd_fifo_alloc(msnd_fifo *f, size_t n)
106{
107 msnd_fifo_free(f);
108 f->data = (char *)vmalloc(n);
109 f->n = n;
110 f->tail = 0;
111 f->head = 0;
112 f->len = 0;
113
114 if (!f->data)
115 return -ENOMEM;
116
117 return 0;
118}
119
120void msnd_fifo_make_empty(msnd_fifo *f)
121{
122 f->len = f->tail = f->head = 0;
123}
124
125int msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len)
126{
127 int count = 0;
128
129 while ((count < len) && (f->len != f->n)) {
130
131 int nwritten;
132
133 if (f->head <= f->tail) {
134 nwritten = len - count;
135 if (nwritten > f->n - f->tail)
136 nwritten = f->n - f->tail;
137 }
138 else {
139 nwritten = f->head - f->tail;
140 if (nwritten > len - count)
141 nwritten = len - count;
142 }
143
144 memcpy_fromio(f->data + f->tail, buf, nwritten);
145
146 count += nwritten;
147 buf += nwritten;
148 f->len += nwritten;
149 f->tail += nwritten;
150 f->tail %= f->n;
151 }
152
153 return count;
154}
155
156int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len)
157{
158 int count = 0;
159
160 while ((count < len) && (f->len != f->n)) {
161
162 int nwritten;
163
164 if (f->head <= f->tail) {
165 nwritten = len - count;
166 if (nwritten > f->n - f->tail)
167 nwritten = f->n - f->tail;
168 }
169 else {
170 nwritten = f->head - f->tail;
171 if (nwritten > len - count)
172 nwritten = len - count;
173 }
174
175 memcpy(f->data + f->tail, buf, nwritten);
176
177 count += nwritten;
178 buf += nwritten;
179 f->len += nwritten;
180 f->tail += nwritten;
181 f->tail %= f->n;
182 }
183
184 return count;
185}
186
187int msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len)
188{
189 int count = 0;
190
191 while ((count < len) && (f->len > 0)) {
192
193 int nread;
194
195 if (f->tail <= f->head) {
196 nread = len - count;
197 if (nread > f->n - f->head)
198 nread = f->n - f->head;
199 }
200 else {
201 nread = f->tail - f->head;
202 if (nread > len - count)
203 nread = len - count;
204 }
205
206 memcpy_toio(buf, f->data + f->head, nread);
207
208 count += nread;
209 buf += nread;
210 f->len -= nread;
211 f->head += nread;
212 f->head %= f->n;
213 }
214
215 return count;
216}
217
218int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len)
219{
220 int count = 0;
221
222 while ((count < len) && (f->len > 0)) {
223
224 int nread;
225
226 if (f->tail <= f->head) {
227 nread = len - count;
228 if (nread > f->n - f->head)
229 nread = f->n - f->head;
230 }
231 else {
232 nread = f->tail - f->head;
233 if (nread > len - count)
234 nread = len - count;
235 }
236
237 memcpy(buf, f->data + f->head, nread);
238
239 count += nread;
240 buf += nread;
241 f->len -= nread;
242 f->head += nread;
243 f->head %= f->n;
244 }
245
246 return count;
247}
248
249static int msnd_wait_TXDE(multisound_dev_t *dev)
250{
251 register unsigned int io = dev->io;
252 register int timeout = 1000;
253
254 while(timeout-- > 0)
255 if (msnd_inb(io + HP_ISR) & HPISR_TXDE)
256 return 0;
257
258 return -EIO;
259}
260
261static int msnd_wait_HC0(multisound_dev_t *dev)
262{
263 register unsigned int io = dev->io;
264 register int timeout = 1000;
265
266 while(timeout-- > 0)
267 if (!(msnd_inb(io + HP_CVR) & HPCVR_HC))
268 return 0;
269
270 return -EIO;
271}
272
273int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
274{
275 unsigned long flags;
276
277 spin_lock_irqsave(&dev->lock, flags);
278 if (msnd_wait_HC0(dev) == 0) {
279 msnd_outb(cmd, dev->io + HP_CVR);
280 spin_unlock_irqrestore(&dev->lock, flags);
281 return 0;
282 }
283 spin_unlock_irqrestore(&dev->lock, flags);
284
285 printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");
286
287 return -EIO;
288}
289
290int msnd_send_word(multisound_dev_t *dev, unsigned char high,
291 unsigned char mid, unsigned char low)
292{
293 register unsigned int io = dev->io;
294
295 if (msnd_wait_TXDE(dev) == 0) {
296 msnd_outb(high, io + HP_TXH);
297 msnd_outb(mid, io + HP_TXM);
298 msnd_outb(low, io + HP_TXL);
299 return 0;
300 }
301
302 printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");
303
304 return -EIO;
305}
306
307int msnd_upload_host(multisound_dev_t *dev, char *bin, int len)
308{
309 int i;
310
311 if (len % 3 != 0) {
312 printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");
313 return -EINVAL;
314 }
315
316 for (i = 0; i < len; i += 3)
317 if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
318 return -EIO;
319
320 msnd_inb(dev->io + HP_RXL);
321 msnd_inb(dev->io + HP_CVR);
322
323 return 0;
324}
325
326int msnd_enable_irq(multisound_dev_t *dev)
327{
328 unsigned long flags;
329
330 if (dev->irq_ref++)
331 return 0;
332
333 printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");
334
335 spin_lock_irqsave(&dev->lock, flags);
336 if (msnd_wait_TXDE(dev) == 0) {
337 msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
338 if (dev->type == msndClassic)
339 msnd_outb(dev->irqid, dev->io + HP_IRQM);
340 msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
341 msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
342 enable_irq(dev->irq);
343 msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
344 spin_unlock_irqrestore(&dev->lock, flags);
345 return 0;
346 }
347 spin_unlock_irqrestore(&dev->lock, flags);
348
349 printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");
350
351 return -EIO;
352}
353
354int msnd_disable_irq(multisound_dev_t *dev)
355{
356 unsigned long flags;
357
358 if (--dev->irq_ref > 0)
359 return 0;
360
361 if (dev->irq_ref < 0)
362 printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);
363
364 printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");
365
366 spin_lock_irqsave(&dev->lock, flags);
367 if (msnd_wait_TXDE(dev) == 0) {
368 msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
369 if (dev->type == msndClassic)
370 msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM);
371 disable_irq(dev->irq);
372 spin_unlock_irqrestore(&dev->lock, flags);
373 return 0;
374 }
375 spin_unlock_irqrestore(&dev->lock, flags);
376
377 printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");
378
379 return -EIO;
380}
381
382#ifndef LINUX20
383EXPORT_SYMBOL(msnd_register);
384EXPORT_SYMBOL(msnd_unregister);
385
386EXPORT_SYMBOL(msnd_init_queue);
387
388EXPORT_SYMBOL(msnd_fifo_init);
389EXPORT_SYMBOL(msnd_fifo_free);
390EXPORT_SYMBOL(msnd_fifo_alloc);
391EXPORT_SYMBOL(msnd_fifo_make_empty);
392EXPORT_SYMBOL(msnd_fifo_write_io);
393EXPORT_SYMBOL(msnd_fifo_read_io);
394EXPORT_SYMBOL(msnd_fifo_write);
395EXPORT_SYMBOL(msnd_fifo_read);
396
397EXPORT_SYMBOL(msnd_send_dsp_cmd);
398EXPORT_SYMBOL(msnd_send_word);
399EXPORT_SYMBOL(msnd_upload_host);
400
401EXPORT_SYMBOL(msnd_enable_irq);
402EXPORT_SYMBOL(msnd_disable_irq);
403#endif
404
405#ifdef MODULE
406MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>");
407MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base");
408MODULE_LICENSE("GPL");
409
410
411int init_module(void)
412{
413 return 0;
414}
415
416void cleanup_module(void)
417{
418}
419#endif