source: sbliveos2/trunk/sblive/midi.c@ 147

Last change on this file since 147 was 142, checked in by ktk, 25 years ago

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1/* $Id: midi.c 142 2000-04-23 14:55:46Z ktk $ */
2
3
4/*
5 **********************************************************************
6 * midi.c - /dev/midi interface for emu10k1 driver
7 * Copyright 1999, 2000 Creative Labs, Inc.
8 *
9 **********************************************************************
10 *
11 * Date Author Summary of changes
12 * ---- ------ ------------------
13 * October 20, 1999 Bertrand Lee base code release
14 *
15 **********************************************************************
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public
28 * License along with this program; if not, write to the Free
29 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
30 * USA.
31 *
32 **********************************************************************
33 */
34
35#define __NO_VERSION__
36#include <linux/module.h>
37#include <asm/uaccess.h>
38
39#include "hwaccess.h"
40#include "cardmo.h"
41#include "cardmi.h"
42#include "midi.h"
43
44static spinlock_t midi_spinlock = SPIN_LOCK_UNLOCKED;
45
46static void init_midi_hdr(struct midi_hdr *midihdr)
47{
48 midihdr->bufferlength = MIDIIN_BUFLEN;
49 midihdr->bytesrecorded = 0;
50 midihdr->flags = 0;
51}
52
53static int midiin_add_buffer(struct emu10k1_mididevice *midi_dev, struct midi_hdr **midihdrptr)
54{
55 struct midi_hdr *midihdr;
56
57 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr *), GFP_KERNEL)) == NULL) {
58 ERROR();
59 return -EINVAL;
60 }
61
62 init_midi_hdr(midihdr);
63
64 if ((midihdr->data = (u8 *) kmalloc(MIDIIN_BUFLEN, GFP_KERNEL)) == NULL) {
65 ERROR();
66 kfree(midihdr);
67 return CTSTATUS_ERROR;
68 }
69
70 if (emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr) != CTSTATUS_SUCCESS) {
71 ERROR();
72 kfree(midihdr->data);
73 kfree(midihdr);
74 return CTSTATUS_ERROR;
75 }
76
77 *midihdrptr = midihdr;
78 list_add_tail(&midihdr->list, &midi_dev->mid_hdrs);
79
80 return CTSTATUS_SUCCESS;
81}
82
83static int emu10k1_midi_open(struct inode *inode, struct file *file)
84{
85 int minor = MINOR(inode->i_rdev);
86 struct emu10k1_card *card;
87 struct emu10k1_mididevice *midi_dev;
88 struct list_head *entry;
89
90 DPF(2, "emu10k1_midi_open()\n");
91
92 /* Check for correct device to open */
93 list_for_each(entry, &emu10k1_devs) {
94 card = list_entry(entry, struct emu10k1_card, list);
95
96 if (card->midi_num == minor)
97 break;
98 }
99
100 if (entry == &emu10k1_devs)
101 return -ENODEV;
102
103 MOD_INC_USE_COUNT;
104
105 /* Wait for device to become free */
106 down(&card->open_sem);
107 while (card->open_mode & (file->f_mode << FMODE_MIDI_SHIFT)) {
108 if (file->f_flags & O_NONBLOCK) {
109 up(&card->open_sem);
110 MOD_DEC_USE_COUNT;
111 return -EBUSY;
112 }
113
114 up(&card->open_sem);
115 interruptible_sleep_on(&card->open_wait);
116
117 if (signal_pending(current)) {
118 MOD_DEC_USE_COUNT;
119 return -ERESTARTSYS;
120 }
121
122 down(&card->open_sem);
123 }
124
125 if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL) {
126 MOD_DEC_USE_COUNT;
127 return -EINVAL;
128 }
129
130 midi_dev->card = card;
131 midi_dev->mistate = MIDIIN_STATE_STOPPED;
132 init_waitqueue_head(&midi_dev->oWait);
133 init_waitqueue_head(&midi_dev->iWait);
134 midi_dev->ird = 0;
135 midi_dev->iwr = 0;
136 midi_dev->icnt = 0;
137 INIT_LIST_HEAD(&midi_dev->mid_hdrs);
138
139 if (file->f_mode & FMODE_READ) {
140 struct midi_openinfo dsCardMidiOpenInfo;
141 struct midi_hdr *midihdr1;
142 struct midi_hdr *midihdr2;
143
144 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
145
146 if (emu10k1_mpuin_open(card, &dsCardMidiOpenInfo)
147 != CTSTATUS_SUCCESS) {
148 ERROR();
149 kfree(midi_dev);
150 MOD_DEC_USE_COUNT;
151 return -ENODEV;
152 }
153
154 /* Add two buffers to receive sysex buffer */
155 if (midiin_add_buffer(midi_dev, &midihdr1) != CTSTATUS_SUCCESS) {
156 kfree(midi_dev);
157 MOD_DEC_USE_COUNT;
158 return -ENODEV;
159 }
160
161 if (midiin_add_buffer(midi_dev, &midihdr2) != CTSTATUS_SUCCESS) {
162 list_del(&midihdr1->list);
163 kfree(midihdr1->data);
164 kfree(midihdr1);
165 kfree(midi_dev);
166 MOD_DEC_USE_COUNT;
167 return -ENODEV;
168 }
169 }
170
171 if (file->f_mode & FMODE_WRITE) {
172 struct midi_openinfo dsCardMidiOpenInfo;
173
174 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
175
176 if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo)
177 != CTSTATUS_SUCCESS) {
178 ERROR();
179 kfree(midi_dev);
180 MOD_DEC_USE_COUNT;
181 return -ENODEV;
182 }
183 }
184
185 file->private_data = (void *) midi_dev;
186
187 card->open_mode |= (file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE);
188
189 up(&card->open_sem);
190
191 return 0;
192}
193
194static int emu10k1_midi_release(struct inode *inode, struct file *file)
195{
196 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
197 struct emu10k1_card *card = midi_dev->card;
198
199 DPF(2, "emu10k1_midi_release()\n");
200
201 if (file->f_mode & FMODE_WRITE) {
202 if (!(file->f_flags & O_NONBLOCK)) {
203
204 while (!signal_pending(current) && (card->mpuout->firstmidiq != NULL)) {
205 DPF(4, "Cannot close - buffers not empty\n");
206
207 interruptible_sleep_on(&midi_dev->oWait);
208
209 }
210 }
211
212 emu10k1_mpuout_close(card);
213 }
214
215 if (file->f_mode & FMODE_READ) {
216 struct midi_hdr *midihdr;
217
218 if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
219 emu10k1_mpuin_stop(card);
220 midi_dev->mistate = MIDIIN_STATE_STOPPED;
221 }
222
223 emu10k1_mpuin_reset(card);
224 emu10k1_mpuin_close(card);
225
226 while (!list_empty(&midi_dev->mid_hdrs)) {
227 midihdr = list_entry(midi_dev->mid_hdrs.next, struct midi_hdr, list);
228
229 list_del(midi_dev->mid_hdrs.next);
230 kfree(midihdr->data);
231 kfree(midihdr);
232 }
233 }
234
235 kfree(midi_dev);
236
237 down(&card->open_sem);
238 card->open_mode &= ~((file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE));
239 up(&card->open_sem);
240 wake_up_interruptible(&card->open_wait);
241
242 MOD_DEC_USE_COUNT;
243
244 return 0;
245}
246
247static ssize_t emu10k1_midi_read(struct file *file, char *buffer, size_t count, loff_t * pos)
248{
249 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
250 ssize_t ret = 0;
251 u16 cnt;
252 unsigned long flags;
253
254 DPD(4, "emu10k1_midi_read(), count %x\n", (u32) count);
255
256 if (pos != &file->f_pos)
257 return -ESPIPE;
258
259 if (!access_ok(VERIFY_WRITE, buffer, count))
260 return -EFAULT;
261
262 if (midi_dev->mistate == MIDIIN_STATE_STOPPED) {
263 if (emu10k1_mpuin_start(midi_dev->card)
264 != CTSTATUS_SUCCESS) {
265 ERROR();
266 return -EINVAL;
267 }
268
269 midi_dev->mistate = MIDIIN_STATE_STARTED;
270 }
271
272 while (count > 0) {
273 cnt = MIDIIN_BUFLEN - midi_dev->ird;
274
275 spin_lock_irqsave(&midi_spinlock, flags);
276
277 if (midi_dev->icnt < cnt)
278 cnt = midi_dev->icnt;
279
280 spin_unlock_irqrestore(&midi_spinlock, flags);
281
282 if (cnt > count)
283 cnt = count;
284
285 if (cnt <= 0) {
286 if (file->f_flags & O_NONBLOCK)
287 return ret ? ret : -EAGAIN;
288 DPF(2, " Go to sleep...\n");
289
290 interruptible_sleep_on(&midi_dev->iWait);
291
292 if (signal_pending(current))
293 return ret ? ret : -ERESTARTSYS;
294
295 continue;
296 }
297
298 if (copy_to_user(buffer, midi_dev->iBuf + midi_dev->ird, cnt)) {
299 ERROR();
300 return ret ? ret : -EFAULT;
301 }
302
303 midi_dev->ird += cnt;
304 midi_dev->ird %= MIDIIN_BUFLEN;
305
306 spin_lock_irqsave(&midi_spinlock, flags);
307
308 midi_dev->icnt -= cnt;
309
310 spin_unlock_irqrestore(&midi_spinlock, flags);
311
312 count -= cnt;
313 buffer += cnt;
314 ret += cnt;
315
316 if (midi_dev->icnt == 0)
317 break;
318 }
319
320 return ret;
321}
322
323static ssize_t emu10k1_midi_write(struct file *file, const char *buffer, size_t count, loff_t * pos)
324{
325 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
326 struct midi_hdr *midihdr;
327 ssize_t ret = 0;
328 unsigned long flags;
329
330 DPD(4, "emu10k1_midi_write(), count=%x\n", (u32) count);
331
332 if (pos != &file->f_pos)
333 return -ESPIPE;
334
335 if (!access_ok(VERIFY_READ, buffer, count))
336 return -EFAULT;
337
338 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr *), GFP_KERNEL)) == NULL)
339 return -EINVAL;
340
341 midihdr->bufferlength = count;
342 midihdr->bytesrecorded = 0;
343 midihdr->flags = 0;
344
345 if ((midihdr->data = (u8 *) kmalloc(count, GFP_KERNEL)) == NULL) {
346 ERROR();
347 kfree(midihdr);
348 return -EINVAL;
349 }
350
351 if (copy_from_user(midihdr->data, buffer, count)) {
352 kfree(midihdr->data);
353 kfree(midihdr);
354 return ret ? ret : -EFAULT;
355 }
356
357 spin_lock_irqsave(&midi_spinlock, flags);
358
359 if (emu10k1_mpuout_add_buffer(midi_dev->card, midihdr) != CTSTATUS_SUCCESS) {
360 ERROR();
361 kfree(midihdr->data);
362 kfree(midihdr);
363 spin_unlock_irqrestore(&midi_spinlock, flags);
364 return -EINVAL;
365 }
366
367 spin_unlock_irqrestore(&midi_spinlock, flags);
368
369 return count;
370}
371
372static unsigned int emu10k1_midi_poll(struct file *file, struct poll_table_struct *wait)
373{
374 DPF(4, "emu10k1_midi_poll() called\n");
375 return 0;
376}
377
378int emu10k1_midi_callback(unsigned long msg, unsigned long refdata, unsigned long *pmsg)
379{
380 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) refdata;
381 struct midi_hdr *midihdr = NULL;
382 unsigned long flags;
383 int i;
384
385 DPF(4, "emu10k1_midi_callback()\n");
386
387 spin_lock_irqsave(&midi_spinlock, flags);
388
389 switch (msg) {
390 case ICARDMIDI_OUTLONGDATA:
391 midihdr = (struct midi_hdr *) pmsg[2];
392
393 kfree(midihdr->data);
394 kfree(midihdr);
395 wake_up_interruptible(&midi_dev->oWait);
396
397 break;
398
399 case ICARDMIDI_INLONGDATA:
400 midihdr = (struct midi_hdr *) pmsg[2];
401
402 for (i = 0; i < midihdr->bytesrecorded; i++) {
403 midi_dev->iBuf[midi_dev->iwr++] = midihdr->data[i];
404 midi_dev->iwr %= MIDIIN_BUFLEN;
405 }
406
407 midi_dev->icnt += midihdr->bytesrecorded;
408
409 if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
410 init_midi_hdr(midihdr);
411 emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr);
412 wake_up_interruptible(&midi_dev->iWait);
413 }
414 break;
415
416 case ICARDMIDI_INDATA:
417 {
418 u8 *pBuf = (u8 *) & pmsg[1];
419 u16 bytesvalid = pmsg[2];
420
421 for (i = 0; i < bytesvalid; i++) {
422 midi_dev->iBuf[midi_dev->iwr++] = pBuf[i];
423 midi_dev->iwr %= MIDIIN_BUFLEN;
424 }
425
426 midi_dev->icnt += bytesvalid;
427 }
428
429 wake_up_interruptible(&midi_dev->iWait);
430 break;
431
432 default: /* Unknown message */
433 return CTSTATUS_ERROR;
434 }
435
436 spin_unlock_irqrestore(&midi_spinlock, flags);
437
438 return CTSTATUS_SUCCESS;
439}
440
441/* MIDI file operations */
442#ifdef TARGET_OS2
443//Hello!?! Use standard C!
444struct file_operations emu10k1_midi_fops =
445{
446 NULL,
447 &emu10k1_midi_read,
448 &emu10k1_midi_write,
449 NULL, /* readdir */
450 &emu10k1_midi_poll,
451 NULL, /* ioctl */
452 NULL, /* mmap */
453 &emu10k1_midi_open,
454#if LINUX_VERSION_CODE >= 0x020100
455 NULL, /* flush */
456#endif
457 &emu10k1_midi_release,
458 NULL, /* fsync */
459 NULL, /* fasync */
460 NULL, /* check_media_change */
461#if LINUX_VERSION_CODE >= 0x020100
462 NULL, /* revalidate */
463 NULL /* lock */
464#endif
465};
466#else
467struct file_operations emu10k1_midi_fops = {
468 read:emu10k1_midi_read,
469 write:emu10k1_midi_write,
470 poll:emu10k1_midi_poll,
471 open:emu10k1_midi_open,
472 release:emu10k1_midi_release,
473};
474#endif
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