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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 | * | |
1da177e4 LT |
23 | ********************************************************************/ |
24 | ||
1da177e4 LT |
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 | ||
a2926b14 | 48 | int msnd_register(multisound_dev_t *dev) |
1da177e4 LT |
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 | { | |
ca43b317 JJ |
96 | vfree(f->data); |
97 | f->data = NULL; | |
1da177e4 LT |
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 |