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25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/vmalloc.h>
28#include <linux/types.h>
29#include <linux/delay.h>
30#include <linux/mm.h>
31#include <linux/init.h>
32#include <linux/interrupt.h>
33
34#include <asm/io.h>
35#include <asm/uaccess.h>
36#include <linux/spinlock.h>
37#include <asm/irq.h>
38#include "msnd.h"
39
40#define LOGNAME "msnd"
41
42#define MSND_MAX_DEVS 4
43
44static multisound_dev_t *devs[MSND_MAX_DEVS];
45static int num_devs;
46
47int msnd_register(multisound_dev_t *dev)
48{
49 int i;
50
51 for (i = 0; i < MSND_MAX_DEVS; ++i)
52 if (devs[i] == NULL)
53 break;
54
55 if (i == MSND_MAX_DEVS)
56 return -ENOMEM;
57
58 devs[i] = dev;
59 ++num_devs;
60 return 0;
61}
62
63void msnd_unregister(multisound_dev_t *dev)
64{
65 int i;
66
67 for (i = 0; i < MSND_MAX_DEVS; ++i)
68 if (devs[i] == dev)
69 break;
70
71 if (i == MSND_MAX_DEVS) {
72 printk(KERN_WARNING LOGNAME ": Unregistering unknown device\n");
73 return;
74 }
75
76 devs[i] = NULL;
77 --num_devs;
78}
79
80void msnd_init_queue(void __iomem *base, int start, int size)
81{
82 writew(PCTODSP_BASED(start), base + JQS_wStart);
83 writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
84 writew(0, base + JQS_wHead);
85 writew(0, base + JQS_wTail);
86}
87
88void msnd_fifo_init(msnd_fifo *f)
89{
90 f->data = NULL;
91}
92
93void msnd_fifo_free(msnd_fifo *f)
94{
95 vfree(f->data);
96 f->data = NULL;
97}
98
99int msnd_fifo_alloc(msnd_fifo *f, size_t n)
100{
101 msnd_fifo_free(f);
102 f->data = vmalloc(n);
103 f->n = n;
104 f->tail = 0;
105 f->head = 0;
106 f->len = 0;
107
108 if (!f->data)
109 return -ENOMEM;
110
111 return 0;
112}
113
114void msnd_fifo_make_empty(msnd_fifo *f)
115{
116 f->len = f->tail = f->head = 0;
117}
118
119int msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len)
120{
121 int count = 0;
122
123 while ((count < len) && (f->len != f->n)) {
124
125 int nwritten;
126
127 if (f->head <= f->tail) {
128 nwritten = len - count;
129 if (nwritten > f->n - f->tail)
130 nwritten = f->n - f->tail;
131 }
132 else {
133 nwritten = f->head - f->tail;
134 if (nwritten > len - count)
135 nwritten = len - count;
136 }
137
138 memcpy_fromio(f->data + f->tail, buf, nwritten);
139
140 count += nwritten;
141 buf += nwritten;
142 f->len += nwritten;
143 f->tail += nwritten;
144 f->tail %= f->n;
145 }
146
147 return count;
148}
149
150int msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len)
151{
152 int count = 0;
153
154 while ((count < len) && (f->len != f->n)) {
155
156 int nwritten;
157
158 if (f->head <= f->tail) {
159 nwritten = len - count;
160 if (nwritten > f->n - f->tail)
161 nwritten = f->n - f->tail;
162 }
163 else {
164 nwritten = f->head - f->tail;
165 if (nwritten > len - count)
166 nwritten = len - count;
167 }
168
169 memcpy(f->data + f->tail, buf, nwritten);
170
171 count += nwritten;
172 buf += nwritten;
173 f->len += nwritten;
174 f->tail += nwritten;
175 f->tail %= f->n;
176 }
177
178 return count;
179}
180
181int msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len)
182{
183 int count = 0;
184
185 while ((count < len) && (f->len > 0)) {
186
187 int nread;
188
189 if (f->tail <= f->head) {
190 nread = len - count;
191 if (nread > f->n - f->head)
192 nread = f->n - f->head;
193 }
194 else {
195 nread = f->tail - f->head;
196 if (nread > len - count)
197 nread = len - count;
198 }
199
200 memcpy_toio(buf, f->data + f->head, nread);
201
202 count += nread;
203 buf += nread;
204 f->len -= nread;
205 f->head += nread;
206 f->head %= f->n;
207 }
208
209 return count;
210}
211
212int msnd_fifo_read(msnd_fifo *f, char *buf, size_t len)
213{
214 int count = 0;
215
216 while ((count < len) && (f->len > 0)) {
217
218 int nread;
219
220 if (f->tail <= f->head) {
221 nread = len - count;
222 if (nread > f->n - f->head)
223 nread = f->n - f->head;
224 }
225 else {
226 nread = f->tail - f->head;
227 if (nread > len - count)
228 nread = len - count;
229 }
230
231 memcpy(buf, f->data + f->head, nread);
232
233 count += nread;
234 buf += nread;
235 f->len -= nread;
236 f->head += nread;
237 f->head %= f->n;
238 }
239
240 return count;
241}
242
243static int msnd_wait_TXDE(multisound_dev_t *dev)
244{
245 register unsigned int io = dev->io;
246 register int timeout = 1000;
247
248 while(timeout-- > 0)
249 if (msnd_inb(io + HP_ISR) & HPISR_TXDE)
250 return 0;
251
252 return -EIO;
253}
254
255static int msnd_wait_HC0(multisound_dev_t *dev)
256{
257 register unsigned int io = dev->io;
258 register int timeout = 1000;
259
260 while(timeout-- > 0)
261 if (!(msnd_inb(io + HP_CVR) & HPCVR_HC))
262 return 0;
263
264 return -EIO;
265}
266
267int msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd)
268{
269 unsigned long flags;
270
271 spin_lock_irqsave(&dev->lock, flags);
272 if (msnd_wait_HC0(dev) == 0) {
273 msnd_outb(cmd, dev->io + HP_CVR);
274 spin_unlock_irqrestore(&dev->lock, flags);
275 return 0;
276 }
277 spin_unlock_irqrestore(&dev->lock, flags);
278
279 printk(KERN_DEBUG LOGNAME ": Send DSP command timeout\n");
280
281 return -EIO;
282}
283
284int msnd_send_word(multisound_dev_t *dev, unsigned char high,
285 unsigned char mid, unsigned char low)
286{
287 register unsigned int io = dev->io;
288
289 if (msnd_wait_TXDE(dev) == 0) {
290 msnd_outb(high, io + HP_TXH);
291 msnd_outb(mid, io + HP_TXM);
292 msnd_outb(low, io + HP_TXL);
293 return 0;
294 }
295
296 printk(KERN_DEBUG LOGNAME ": Send host word timeout\n");
297
298 return -EIO;
299}
300
301int msnd_upload_host(multisound_dev_t *dev, char *bin, int len)
302{
303 int i;
304
305 if (len % 3 != 0) {
306 printk(KERN_WARNING LOGNAME ": Upload host data not multiple of 3!\n");
307 return -EINVAL;
308 }
309
310 for (i = 0; i < len; i += 3)
311 if (msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]) != 0)
312 return -EIO;
313
314 msnd_inb(dev->io + HP_RXL);
315 msnd_inb(dev->io + HP_CVR);
316
317 return 0;
318}
319
320int msnd_enable_irq(multisound_dev_t *dev)
321{
322 unsigned long flags;
323
324 if (dev->irq_ref++)
325 return 0;
326
327 printk(KERN_DEBUG LOGNAME ": Enabling IRQ\n");
328
329 spin_lock_irqsave(&dev->lock, flags);
330 if (msnd_wait_TXDE(dev) == 0) {
331 msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
332 if (dev->type == msndClassic)
333 msnd_outb(dev->irqid, dev->io + HP_IRQM);
334 msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
335 msnd_outb(msnd_inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
336 enable_irq(dev->irq);
337 msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size);
338 spin_unlock_irqrestore(&dev->lock, flags);
339 return 0;
340 }
341 spin_unlock_irqrestore(&dev->lock, flags);
342
343 printk(KERN_DEBUG LOGNAME ": Enable IRQ failed\n");
344
345 return -EIO;
346}
347
348int msnd_disable_irq(multisound_dev_t *dev)
349{
350 unsigned long flags;
351
352 if (--dev->irq_ref > 0)
353 return 0;
354
355 if (dev->irq_ref < 0)
356 printk(KERN_DEBUG LOGNAME ": IRQ ref count is %d\n", dev->irq_ref);
357
358 printk(KERN_DEBUG LOGNAME ": Disabling IRQ\n");
359
360 spin_lock_irqsave(&dev->lock, flags);
361 if (msnd_wait_TXDE(dev) == 0) {
362 msnd_outb(msnd_inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
363 if (dev->type == msndClassic)
364 msnd_outb(HPIRQ_NONE, dev->io + HP_IRQM);
365 disable_irq(dev->irq);
366 spin_unlock_irqrestore(&dev->lock, flags);
367 return 0;
368 }
369 spin_unlock_irqrestore(&dev->lock, flags);
370
371 printk(KERN_DEBUG LOGNAME ": Disable IRQ failed\n");
372
373 return -EIO;
374}
375
376#ifndef LINUX20
377EXPORT_SYMBOL(msnd_register);
378EXPORT_SYMBOL(msnd_unregister);
379
380EXPORT_SYMBOL(msnd_init_queue);
381
382EXPORT_SYMBOL(msnd_fifo_init);
383EXPORT_SYMBOL(msnd_fifo_free);
384EXPORT_SYMBOL(msnd_fifo_alloc);
385EXPORT_SYMBOL(msnd_fifo_make_empty);
386EXPORT_SYMBOL(msnd_fifo_write_io);
387EXPORT_SYMBOL(msnd_fifo_read_io);
388EXPORT_SYMBOL(msnd_fifo_write);
389EXPORT_SYMBOL(msnd_fifo_read);
390
391EXPORT_SYMBOL(msnd_send_dsp_cmd);
392EXPORT_SYMBOL(msnd_send_word);
393EXPORT_SYMBOL(msnd_upload_host);
394
395EXPORT_SYMBOL(msnd_enable_irq);
396EXPORT_SYMBOL(msnd_disable_irq);
397#endif
398
399#ifdef MODULE
400MODULE_AUTHOR ("Andrew Veliath <andrewtv@usa.net>");
401MODULE_DESCRIPTION ("Turtle Beach MultiSound Driver Base");
402MODULE_LICENSE("GPL");
403
404
405int init_module(void)
406{
407 return 0;
408}
409
410void cleanup_module(void)
411{
412}
413#endif
414
