sound: sound/oss/: remove CVS keywords
[linux-2.6.git] / sound / oss / msnd.c
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  ********************************************************************/
24
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
48 int msnd_register(multisound_dev_t *dev)
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 {
96         vfree(f->data);
97         f->data = NULL;
98 }
99
100 int msnd_fifo_alloc(msnd_fifo *f, size_t n)
101 {
102         msnd_fifo_free(f);
103         f->data = (char *)vmalloc(n);
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