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 = 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
415
|
This page was automatically generated by the
LXR engine.
|