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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 | ||
1da177e4 LT |
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> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/interrupt.h> | |
36 | ||
37 | #include <asm/io.h> | |
38 | #include <asm/uaccess.h> | |
39 | #include <linux/spinlock.h> | |
40 | #include <asm/irq.h> | |
41 | #include "msnd.h" | |
42 | ||
43 | #define LOGNAME "msnd" | |
44 | ||
45 | #define MSND_MAX_DEVS 4 | |
46 | ||
47 | static multisound_dev_t *devs[MSND_MAX_DEVS]; | |
48 | static int num_devs; | |
49 | ||
50 | int __init msnd_register(multisound_dev_t *dev) | |
51 | { | |
52 | int i; | |
53 | ||
54 | for (i = 0; i < MSND_MAX_DEVS; ++i) | |
55 | if (devs[i] == NULL) | |
56 | break; | |
57 | ||
58 | if (i == MSND_MAX_DEVS) | |
59 | return -ENOMEM; | |
60 | ||
61 | devs[i] = dev; | |
62 | ++num_devs; | |
63 | return 0; | |
64 | } | |
65 | ||
66 | void msnd_unregister(multisound_dev_t *dev) | |
67 | { | |
68 | int i; | |
69 | ||
70 | for (i = 0; i < MSND_MAX_DEVS; ++i) | |
71 | if (devs[i] == dev) | |
72 | break; | |
73 | ||
74 | if (i == MSND_MAX_DEVS) { | |
75 | printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n"); | |
76 | return; | |
77 | } | |
78 | ||
79 | devs[i] = NULL; | |
80 | --num_devs; | |
81 | } | |
82 | ||
83 | void msnd_init_queue(void __iomem *base, int start, int size) | |
84 | { | |
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); | |
89 | } | |
90 | ||
91 | void msnd_fifo_init(msnd_fifo *f) | |
92 | { | |
93 | f->data = NULL; | |
94 | } | |
95 | ||
96 | void msnd_fifo_free(msnd_fifo *f) | |
97 | { | |
98 | if (f->data) { | |
99 | vfree(f->data); | |
100 | f->data = NULL; | |
101 | } | |
102 | } | |
103 | ||
104 | int msnd_fifo_alloc(msnd_fifo *f, size_t n) | |
105 | { | |
106 | msnd_fifo_free(f); | |
107 | f->data = (char *)vmalloc(n); | |
108 | f->n = n; | |
109 | f->tail = 0; | |
110 | f->head = 0; | |
111 | f->len = 0; | |
112 | ||
113 | if (!f->data) | |
114 | return -ENOMEM; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | void msnd_fifo_make_empty(msnd_fifo *f) | |
120 | { | |
121 | f->len = f->tail = f->head = 0; | |
122 | } | |
123 | ||
124 | int msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len) | |
125 | { | |
126 | int count = 0; | |
127 | ||
128 | while ((count < len) && (f->len != f->n)) { | |
129 | ||
130 | int nwritten; | |
131 | ||
132 | if (f->head <= f->tail) { | |
133 | nwritten = len - count; | |
134 | if (nwritten > f->n - f->tail) | |
135 | nwritten = f->n - f->tail; | |
136 | } | |
137 | else { | |
138 | nwritten = f->head - f->tail; | |
139 | if (nwritten > len - count) | |
140 | nwritten = len - count; | |
141 | } | |
142 | ||
143 | memcpy_fromio(f->data + f->tail, buf, nwritten); | |
144 | ||
145 | count += nwritten; | |
146 | buf += nwritten; | |
147 | f->len += nwritten; | |
148 | f->tail += nwritten; | |
149 | f->tail %= f->n; | |
150 | } | |
151 | ||
152 | return count; | |
153 | } | |
154 | ||
155 | int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len) | |
156 | { | |
157 | int count = 0; | |
158 | ||
159 | while ((count < len) && (f->len != f->n)) { | |
160 | ||
161 | int nwritten; | |
162 | ||
163 | if (f->head <= f->tail) { | |
164 | nwritten = len - count; | |
165 | if (nwritten > f->n - f->tail) | |
166 | nwritten = f->n - f->tail; | |
167 | } | |
168 | else { | |
169 | nwritten = f->head - f->tail; | |
170 | if (nwritten > len - count) | |
171 | nwritten = len - count; | |
172 | } | |
173 | ||
174 | memcpy(f->data + f->tail, buf, nwritten); | |
175 | ||
176 | count += nwritten; | |
177 | buf += nwritten; | |
178 | f->len += nwritten; | |
179 | f->tail += nwritten; | |
180 | f->tail %= f->n; | |
181 | } | |
182 | ||
183 | return count; | |
184 | } | |
185 | ||
186 | int msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len) | |
187 | { | |
188 | int count = 0; | |
189 | ||
190 | while ((count < len) && (f->len > 0)) { | |
191 | ||
192 | int nread; | |
193 | ||
194 | if (f->tail <= f->head) { | |
195 | nread = len - count; | |
196 | if (nread > f->n - f->head) | |
197 | nread = f->n - f->head; | |
198 | } | |
199 | else { | |
200 | nread = f->tail - f->head; | |
201 | if (nread > len - count) | |
202 | nread = len - count; | |
203 | } | |
204 | ||
205 | memcpy_toio(buf, f->data + f->head, nread); | |
206 | ||
207 | count += nread; | |
208 | buf += nread; | |
209 | f->len -= nread; | |
210 | f->head += nread; | |
211 | f->head %= f->n; | |
212 | } | |
213 | ||
214 | return count; | |
215 | } | |
216 | ||
217 | int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len) | |
218 | { | |
219 | int count = 0; | |
220 | ||
221 | while ((count < len) && (f->len > 0)) { | |
222 | ||
223 | int nread; | |
224 | ||
225 | if (f->tail <= f->head) { | |
226 | nread = len - count; | |
227 | if (nread > f->n - f->head) | |
228 | nread = f->n - f->head; | |
229 | } | |
230 | else { | |
231 | nread = f->tail - f->head; | |
232 | if (nread > len - count) | |
233 | nread = len - count; | |
234 | } | |
235 | ||
236 | memcpy(buf, f->data + f->head, nread); | |
237 | ||
238 | count += nread; | |
239 | buf += nread; | |
240 | f->len -= nread; | |
241 | f->head += nread; | |
242 | f->head %= f->n; | |
243 | } | |
244 | ||
245 | return count; | |
246 | } | |
247 | ||
248 | static int msnd_wait_TXDE(multisound_dev_t *dev) | |
249 | { | |
250 | register unsigned int io = dev->io; | |
251 | register int timeout = 1000; | |
252 | ||
253 | while(timeout-- > 0) | |
254 | if (msnd_inb(io + HP_ISR) & HPISR_TXDE) | |
255 | return 0; | |
256 | ||
257 | return -EIO; | |
258 | } | |
259 | ||
260 | static int msnd_wait_HC0(multisound_dev_t *dev) | |
261 | { | |
262 | register unsigned int io = dev->io; | |
263 | register int timeout = 1000; | |
264 | ||
265 | while(timeout-- > 0) | |
266 | if (!(msnd_inb(io + HP_CVR) & HPCVR_HC)) | |
267 | return 0; | |
268 | ||
269 | return -EIO; | |
270 | } | |
271 | ||
272 | int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd) | |
273 | { | |
274 | unsigned long flags; | |
275 | ||
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); | |
280 | return 0; | |
281 | } | |
282 | spin_unlock_irqrestore(&dev->lock, flags); | |
283 | ||
284 | printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n"); | |
285 | ||
286 | return -EIO; | |
287 | } | |
288 | ||
289 | int msnd_send_word(multisound_dev_t *dev, unsigned char high, | |
290 | unsigned char mid, unsigned char low) | |
291 | { | |
292 | register unsigned int io = dev->io; | |
293 | ||
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); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | printk(KERN_DEBUG LOGNAME ": Send host word timeout\n"); | |
302 | ||
303 | return -EIO; | |
304 | } | |
305 | ||
306 | int msnd_upload_host(multisound_dev_t *dev, char *bin, int len) | |
307 | { | |
308 | int i; | |
309 | ||
310 | if (len % 3 != 0) { | |
311 | printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n"); | |
312 | return -EINVAL; | |
313 | } | |
314 | ||
315 | for (i = 0; i < len; i += 3) | |
316 | if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0) | |
317 | return -EIO; | |
318 | ||
319 | msnd_inb(dev->io + HP_RXL); | |
320 | msnd_inb(dev->io + HP_CVR); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | int msnd_enable_irq(multisound_dev_t *dev) | |
326 | { | |
327 | unsigned long flags; | |
328 | ||
329 | if (dev->irq_ref++) | |
330 | return 0; | |
331 | ||
332 | printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n"); | |
333 | ||
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); | |
344 | return 0; | |
345 | } | |
346 | spin_unlock_irqrestore(&dev->lock, flags); | |
347 | ||
348 | printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n"); | |
349 | ||
350 | return -EIO; | |
351 | } | |
352 | ||
353 | int msnd_disable_irq(multisound_dev_t *dev) | |
354 | { | |
355 | unsigned long flags; | |
356 | ||
357 | if (--dev->irq_ref > 0) | |
358 | return 0; | |
359 | ||
360 | if (dev->irq_ref < 0) | |
361 | printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref); | |
362 | ||
363 | printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n"); | |
364 | ||
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); | |
372 | return 0; | |
373 | } | |
374 | spin_unlock_irqrestore(&dev->lock, flags); | |
375 | ||
376 | printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n"); | |
377 | ||
378 | return -EIO; | |
379 | } | |
380 | ||
381 | #ifndef LINUX20 | |
382 | EXPORT_SYMBOL(msnd_register); | |
383 | EXPORT_SYMBOL(msnd_unregister); | |
384 | ||
385 | EXPORT_SYMBOL(msnd_init_queue); | |
386 | ||
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); | |
395 | ||
396 | EXPORT_SYMBOL(msnd_send_dsp_cmd); | |
397 | EXPORT_SYMBOL(msnd_send_word); | |
398 | EXPORT_SYMBOL(msnd_upload_host); | |
399 | ||
400 | EXPORT_SYMBOL(msnd_enable_irq); | |
401 | EXPORT_SYMBOL(msnd_disable_irq); | |
402 | #endif | |
403 | ||
404 | #ifdef MODULE | |
405 | MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>"); | |
406 | MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base"); | |
407 | MODULE_LICENSE("GPL"); | |
408 | ||
409 | ||
410 | int init_module(void) | |
411 | { | |
412 | return 0; | |
413 | } | |
414 | ||
415 | void cleanup_module(void) | |
416 | { | |
417 | } | |
418 | #endif |