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1da177e4 LT |
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 | ||
48 | static multisound_dev_t *devs[MSND_MAX_DEVS]; | |
49 | static int num_devs; | |
50 | ||
51 | int __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 | ||
67 | void 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 | ||
84 | void 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 | ||
92 | void msnd_fifo_init(msnd_fifo *f) | |
93 | { | |
94 | f->data = NULL; | |
95 | } | |
96 | ||
97 | void msnd_fifo_free(msnd_fifo *f) | |
98 | { | |
99 | if (f->data) { | |
100 | vfree(f->data); | |
101 | f->data = NULL; | |
102 | } | |
103 | } | |
104 | ||
105 | int 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 | ||
120 | void msnd_fifo_make_empty(msnd_fifo *f) | |
121 | { | |
122 | f->len = f->tail = f->head = 0; | |
123 | } | |
124 | ||
125 | int 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 | ||
156 | int 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 | ||
187 | int 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 | ||
218 | int 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 | ||
249 | static 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 | ||
261 | static 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 | ||
273 | int 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 | ||
290 | int 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 | ||
307 | int 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 | ||
326 | int 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 | ||
354 | int 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 | |
383 | EXPORT_SYMBOL(msnd_register); | |
384 | EXPORT_SYMBOL(msnd_unregister); | |
385 | ||
386 | EXPORT_SYMBOL(msnd_init_queue); | |
387 | ||
388 | EXPORT_SYMBOL(msnd_fifo_init); | |
389 | EXPORT_SYMBOL(msnd_fifo_free); | |
390 | EXPORT_SYMBOL(msnd_fifo_alloc); | |
391 | EXPORT_SYMBOL(msnd_fifo_make_empty); | |
392 | EXPORT_SYMBOL(msnd_fifo_write_io); | |
393 | EXPORT_SYMBOL(msnd_fifo_read_io); | |
394 | EXPORT_SYMBOL(msnd_fifo_write); | |
395 | EXPORT_SYMBOL(msnd_fifo_read); | |
396 | ||
397 | EXPORT_SYMBOL(msnd_send_dsp_cmd); | |
398 | EXPORT_SYMBOL(msnd_send_word); | |
399 | EXPORT_SYMBOL(msnd_upload_host); | |
400 | ||
401 | EXPORT_SYMBOL(msnd_enable_irq); | |
402 | EXPORT_SYMBOL(msnd_disable_irq); | |
403 | #endif | |
404 | ||
405 | #ifdef MODULE | |
406 | MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>"); | |
407 | MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base"); | |
408 | MODULE_LICENSE("GPL"); | |
409 | ||
410 | ||
411 | int init_module(void) | |
412 | { | |
413 | return 0; | |
414 | } | |
415 | ||
416 | void cleanup_module(void) | |
417 | { | |
418 | } | |
419 | #endif |