1 /*
2 * sound/oss/mpu401.c
3 *
4 * The low level driver for Roland MPU-401 compatible Midi cards.
5 */
6 /*
7 * Copyright (C) by Hannu Savolainen 1993-1997
8 *
9 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
10 * Version 2 (June 1991). See the "COPYING" file distributed with this software
11 * for more info.
12 *
13 *
14 * Thomas Sailer ioctl code reworked (vmalloc/vfree removed)
15 * Alan Cox modularisation, use normal request_irq, use dev_id
16 * Bartlomiej Zolnierkiewicz removed some __init to allow using many drivers
17 * Chris Rankin Update the module-usage counter for the coprocessor
18 * Zwane Mwaikambo Changed attach/unload resource freeing
19 */
20
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/init.h>
24 #include <linux/interrupt.h>
25 #include <linux/spinlock.h>
26 #define USE_SEQ_MACROS
27 #define USE_SIMPLE_MACROS
28
29 #include "sound_config.h"
30
31 #include "coproc.h"
32 #include "mpu401.h"
33
34 static int timer_mode = TMR_INTERNAL, timer_caps = TMR_INTERNAL;
35
36 struct mpu_config
37 {
38 int base; /*
39 * I/O base
40 */
41 int irq;
42 int opened; /*
43 * Open mode
44 */
45 int devno;
46 int synthno;
47 int uart_mode;
48 int initialized;
49 int mode;
50 #define MODE_MIDI 1
51 #define MODE_SYNTH 2
52 unsigned char version, revision;
53 unsigned int capabilities;
54 #define MPU_CAP_INTLG 0x10000000
55 #define MPU_CAP_SYNC 0x00000010
56 #define MPU_CAP_FSK 0x00000020
57 #define MPU_CAP_CLS 0x00000040
58 #define MPU_CAP_SMPTE 0x00000080
59 #define MPU_CAP_2PORT 0x00000001
60 int timer_flag;
61
62 #define MBUF_MAX 10
63 #define BUFTEST(dc) if (dc->m_ptr >= MBUF_MAX || dc->m_ptr < 0) \
64 {printk( "MPU: Invalid buffer pointer %d/%d, s=%d\n", dc->m_ptr, dc->m_left, dc->m_state);dc->m_ptr--;}
65 int m_busy;
66 unsigned char m_buf[MBUF_MAX];
67 int m_ptr;
68 int m_state;
69 int m_left;
70 unsigned char last_status;
71 void (*inputintr) (int dev, unsigned char data);
72 int shared_irq;
73 int *osp;
74 spinlock_t lock;
75 };
76
77 #define DATAPORT(base) (base)
78 #define COMDPORT(base) (base+1)
79 #define STATPORT(base) (base+1)
80
81
82 static void mpu401_close(int dev);
83
mpu401_status(struct mpu_config * devc)84 static inline int mpu401_status(struct mpu_config *devc)
85 {
86 return inb(STATPORT(devc->base));
87 }
88
89 #define input_avail(devc) (!(mpu401_status(devc)&INPUT_AVAIL))
90 #define output_ready(devc) (!(mpu401_status(devc)&OUTPUT_READY))
91
write_command(struct mpu_config * devc,unsigned char cmd)92 static inline void write_command(struct mpu_config *devc, unsigned char cmd)
93 {
94 outb(cmd, COMDPORT(devc->base));
95 }
96
read_data(struct mpu_config * devc)97 static inline int read_data(struct mpu_config *devc)
98 {
99 return inb(DATAPORT(devc->base));
100 }
101
write_data(struct mpu_config * devc,unsigned char byte)102 static inline void write_data(struct mpu_config *devc, unsigned char byte)
103 {
104 outb(byte, DATAPORT(devc->base));
105 }
106
107 #define OUTPUT_READY 0x40
108 #define INPUT_AVAIL 0x80
109 #define MPU_ACK 0xFE
110 #define MPU_RESET 0xFF
111 #define UART_MODE_ON 0x3F
112
113 static struct mpu_config dev_conf[MAX_MIDI_DEV];
114
115 static int n_mpu_devs;
116
117 static int reset_mpu401(struct mpu_config *devc);
118 static void set_uart_mode(int dev, struct mpu_config *devc, int arg);
119
120 static int mpu_timer_init(int midi_dev);
121 static void mpu_timer_interrupt(void);
122 static void timer_ext_event(struct mpu_config *devc, int event, int parm);
123
124 static struct synth_info mpu_synth_info_proto = {
125 "MPU-401 MIDI interface",
126 0,
127 SYNTH_TYPE_MIDI,
128 MIDI_TYPE_MPU401,
129 0, 128,
130 0, 128,
131 SYNTH_CAP_INPUT
132 };
133
134 static struct synth_info mpu_synth_info[MAX_MIDI_DEV];
135
136 /*
137 * States for the input scanner
138 */
139
140 #define ST_INIT 0 /* Ready for timing byte or msg */
141 #define ST_TIMED 1 /* Leading timing byte rcvd */
142 #define ST_DATABYTE 2 /* Waiting for (nr_left) data bytes */
143
144 #define ST_SYSMSG 100 /* System message (sysx etc). */
145 #define ST_SYSEX 101 /* System exclusive msg */
146 #define ST_MTC 102 /* Midi Time Code (MTC) qframe msg */
147 #define ST_SONGSEL 103 /* Song select */
148 #define ST_SONGPOS 104 /* Song position pointer */
149
150 static unsigned char len_tab[] = /* # of data bytes following a status
151 */
152 {
153 2, /* 8x */
154 2, /* 9x */
155 2, /* Ax */
156 2, /* Bx */
157 1, /* Cx */
158 1, /* Dx */
159 2, /* Ex */
160 0 /* Fx */
161 };
162
163 #define STORE(cmd) \
164 { \
165 int len; \
166 unsigned char obuf[8]; \
167 cmd; \
168 seq_input_event(obuf, len); \
169 }
170
171 #define _seqbuf obuf
172 #define _seqbufptr 0
173 #define _SEQ_ADVBUF(x) len=x
174
mpu_input_scanner(struct mpu_config * devc,unsigned char midic)175 static int mpu_input_scanner(struct mpu_config *devc, unsigned char midic)
176 {
177
178 switch (devc->m_state)
179 {
180 case ST_INIT:
181 switch (midic)
182 {
183 case 0xf8:
184 /* Timer overflow */
185 break;
186
187 case 0xfc:
188 printk("<all end>");
189 break;
190
191 case 0xfd:
192 if (devc->timer_flag)
193 mpu_timer_interrupt();
194 break;
195
196 case 0xfe:
197 return MPU_ACK;
198
199 case 0xf0:
200 case 0xf1:
201 case 0xf2:
202 case 0xf3:
203 case 0xf4:
204 case 0xf5:
205 case 0xf6:
206 case 0xf7:
207 printk("<Trk data rq #%d>", midic & 0x0f);
208 break;
209
210 case 0xf9:
211 printk("<conductor rq>");
212 break;
213
214 case 0xff:
215 devc->m_state = ST_SYSMSG;
216 break;
217
218 default:
219 if (midic <= 0xef)
220 {
221 /* printk( "mpu time: %d ", midic); */
222 devc->m_state = ST_TIMED;
223 }
224 else
225 printk("<MPU: Unknown event %02x> ", midic);
226 }
227 break;
228
229 case ST_TIMED:
230 {
231 int msg = ((int) (midic & 0xf0) >> 4);
232
233 devc->m_state = ST_DATABYTE;
234
235 if (msg < 8) /* Data byte */
236 {
237 /* printk( "midi msg (running status) "); */
238 msg = ((int) (devc->last_status & 0xf0) >> 4);
239 msg -= 8;
240 devc->m_left = len_tab[msg] - 1;
241
242 devc->m_ptr = 2;
243 devc->m_buf[0] = devc->last_status;
244 devc->m_buf[1] = midic;
245
246 if (devc->m_left <= 0)
247 {
248 devc->m_state = ST_INIT;
249 do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr);
250 devc->m_ptr = 0;
251 }
252 }
253 else if (msg == 0xf) /* MPU MARK */
254 {
255 devc->m_state = ST_INIT;
256
257 switch (midic)
258 {
259 case 0xf8:
260 /* printk( "NOP "); */
261 break;
262
263 case 0xf9:
264 /* printk( "meas end "); */
265 break;
266
267 case 0xfc:
268 /* printk( "data end "); */
269 break;
270
271 default:
272 printk("Unknown MPU mark %02x\n", midic);
273 }
274 }
275 else
276 {
277 devc->last_status = midic;
278 /* printk( "midi msg "); */
279 msg -= 8;
280 devc->m_left = len_tab[msg];
281
282 devc->m_ptr = 1;
283 devc->m_buf[0] = midic;
284
285 if (devc->m_left <= 0)
286 {
287 devc->m_state = ST_INIT;
288 do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr);
289 devc->m_ptr = 0;
290 }
291 }
292 }
293 break;
294
295 case ST_SYSMSG:
296 switch (midic)
297 {
298 case 0xf0:
299 printk("<SYX>");
300 devc->m_state = ST_SYSEX;
301 break;
302
303 case 0xf1:
304 devc->m_state = ST_MTC;
305 break;
306
307 case 0xf2:
308 devc->m_state = ST_SONGPOS;
309 devc->m_ptr = 0;
310 break;
311
312 case 0xf3:
313 devc->m_state = ST_SONGSEL;
314 break;
315
316 case 0xf6:
317 /* printk( "tune_request\n"); */
318 devc->m_state = ST_INIT;
319 break;
320
321 /*
322 * Real time messages
323 */
324 case 0xf8:
325 /* midi clock */
326 devc->m_state = ST_INIT;
327 timer_ext_event(devc, TMR_CLOCK, 0);
328 break;
329
330 case 0xfA:
331 devc->m_state = ST_INIT;
332 timer_ext_event(devc, TMR_START, 0);
333 break;
334
335 case 0xFB:
336 devc->m_state = ST_INIT;
337 timer_ext_event(devc, TMR_CONTINUE, 0);
338 break;
339
340 case 0xFC:
341 devc->m_state = ST_INIT;
342 timer_ext_event(devc, TMR_STOP, 0);
343 break;
344
345 case 0xFE:
346 /* active sensing */
347 devc->m_state = ST_INIT;
348 break;
349
350 case 0xff:
351 /* printk( "midi hard reset"); */
352 devc->m_state = ST_INIT;
353 break;
354
355 default:
356 printk("unknown MIDI sysmsg %0x\n", midic);
357 devc->m_state = ST_INIT;
358 }
359 break;
360
361 case ST_MTC:
362 devc->m_state = ST_INIT;
363 printk("MTC frame %x02\n", midic);
364 break;
365
366 case ST_SYSEX:
367 if (midic == 0xf7)
368 {
369 printk("<EOX>");
370 devc->m_state = ST_INIT;
371 }
372 else
373 printk("%02x ", midic);
374 break;
375
376 case ST_SONGPOS:
377 BUFTEST(devc);
378 devc->m_buf[devc->m_ptr++] = midic;
379 if (devc->m_ptr == 2)
380 {
381 devc->m_state = ST_INIT;
382 devc->m_ptr = 0;
383 timer_ext_event(devc, TMR_SPP,
384 ((devc->m_buf[1] & 0x7f) << 7) |
385 (devc->m_buf[0] & 0x7f));
386 }
387 break;
388
389 case ST_DATABYTE:
390 BUFTEST(devc);
391 devc->m_buf[devc->m_ptr++] = midic;
392 if ((--devc->m_left) <= 0)
393 {
394 devc->m_state = ST_INIT;
395 do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr);
396 devc->m_ptr = 0;
397 }
398 break;
399
400 default:
401 printk("Bad state %d ", devc->m_state);
402 devc->m_state = ST_INIT;
403 }
404 return 1;
405 }
406
mpu401_input_loop(struct mpu_config * devc)407 static void mpu401_input_loop(struct mpu_config *devc)
408 {
409 unsigned long flags;
410 int busy;
411 int n;
412
413 spin_lock_irqsave(&devc->lock,flags);
414 busy = devc->m_busy;
415 devc->m_busy = 1;
416 spin_unlock_irqrestore(&devc->lock,flags);
417
418 if (busy) /* Already inside the scanner */
419 return;
420
421 n = 50;
422
423 while (input_avail(devc) && n-- > 0)
424 {
425 unsigned char c = read_data(devc);
426
427 if (devc->mode == MODE_SYNTH)
428 {
429 mpu_input_scanner(devc, c);
430 }
431 else if (devc->opened & OPEN_READ && devc->inputintr != NULL)
432 devc->inputintr(devc->devno, c);
433 }
434 devc->m_busy = 0;
435 }
436
mpuintr(int irq,void * dev_id)437 static irqreturn_t mpuintr(int irq, void *dev_id)
438 {
439 struct mpu_config *devc;
440 int dev = (int)(unsigned long) dev_id;
441 int handled = 0;
442
443 devc = &dev_conf[dev];
444
445 if (input_avail(devc))
446 {
447 handled = 1;
448 if (devc->base != 0 && (devc->opened & OPEN_READ || devc->mode == MODE_SYNTH))
449 mpu401_input_loop(devc);
450 else
451 {
452 /* Dummy read (just to acknowledge the interrupt) */
453 read_data(devc);
454 }
455 }
456 return IRQ_RETVAL(handled);
457 }
458
mpu401_open(int dev,int mode,void (* input)(int dev,unsigned char data),void (* output)(int dev))459 static int mpu401_open(int dev, int mode,
460 void (*input) (int dev, unsigned char data),
461 void (*output) (int dev)
462 )
463 {
464 int err;
465 struct mpu_config *devc;
466 struct coproc_operations *coprocessor;
467
468 if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
469 return -ENXIO;
470
471 devc = &dev_conf[dev];
472
473 if (devc->opened)
474 return -EBUSY;
475 /*
476 * Verify that the device is really running.
477 * Some devices (such as Ensoniq SoundScape don't
478 * work before the on board processor (OBP) is initialized
479 * by downloading its microcode.
480 */
481
482 if (!devc->initialized)
483 {
484 if (mpu401_status(devc) == 0xff) /* Bus float */
485 {
486 printk(KERN_ERR "mpu401: Device not initialized properly\n");
487 return -EIO;
488 }
489 reset_mpu401(devc);
490 }
491
492 if ( (coprocessor = midi_devs[dev]->coproc) != NULL )
493 {
494 if (!try_module_get(coprocessor->owner)) {
495 mpu401_close(dev);
496 return -ENODEV;
497 }
498
499 if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0)
500 {
501 printk(KERN_WARNING "MPU-401: Can't access coprocessor device\n");
502 mpu401_close(dev);
503 return err;
504 }
505 }
506
507 set_uart_mode(dev, devc, 1);
508 devc->mode = MODE_MIDI;
509 devc->synthno = 0;
510
511 mpu401_input_loop(devc);
512
513 devc->inputintr = input;
514 devc->opened = mode;
515
516 return 0;
517 }
518
mpu401_close(int dev)519 static void mpu401_close(int dev)
520 {
521 struct mpu_config *devc;
522 struct coproc_operations *coprocessor;
523
524 devc = &dev_conf[dev];
525 if (devc->uart_mode)
526 reset_mpu401(devc); /*
527 * This disables the UART mode
528 */
529 devc->mode = 0;
530 devc->inputintr = NULL;
531
532 coprocessor = midi_devs[dev]->coproc;
533 if (coprocessor) {
534 coprocessor->close(coprocessor->devc, COPR_MIDI);
535 module_put(coprocessor->owner);
536 }
537 devc->opened = 0;
538 }
539
mpu401_out(int dev,unsigned char midi_byte)540 static int mpu401_out(int dev, unsigned char midi_byte)
541 {
542 int timeout;
543 unsigned long flags;
544
545 struct mpu_config *devc;
546
547 devc = &dev_conf[dev];
548
549 /*
550 * Sometimes it takes about 30000 loops before the output becomes ready
551 * (After reset). Normally it takes just about 10 loops.
552 */
553
554 for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
555
556 spin_lock_irqsave(&devc->lock,flags);
557 if (!output_ready(devc))
558 {
559 printk(KERN_WARNING "mpu401: Send data timeout\n");
560 spin_unlock_irqrestore(&devc->lock,flags);
561 return 0;
562 }
563 write_data(devc, midi_byte);
564 spin_unlock_irqrestore(&devc->lock,flags);
565 return 1;
566 }
567
mpu401_command(int dev,mpu_command_rec * cmd)568 static int mpu401_command(int dev, mpu_command_rec * cmd)
569 {
570 int i, timeout, ok;
571 unsigned long flags;
572 struct mpu_config *devc;
573
574 devc = &dev_conf[dev];
575
576 if (devc->uart_mode) /*
577 * Not possible in UART mode
578 */
579 {
580 printk(KERN_WARNING "mpu401: commands not possible in the UART mode\n");
581 return -EINVAL;
582 }
583 /*
584 * Test for input since pending input seems to block the output.
585 */
586 if (input_avail(devc))
587 mpu401_input_loop(devc);
588
589 /*
590 * Sometimes it takes about 50000 loops before the output becomes ready
591 * (After reset). Normally it takes just about 10 loops.
592 */
593
594 timeout = 50000;
595 retry:
596 if (timeout-- <= 0)
597 {
598 printk(KERN_WARNING "mpu401: Command (0x%x) timeout\n", (int) cmd->cmd);
599 return -EIO;
600 }
601 spin_lock_irqsave(&devc->lock,flags);
602
603 if (!output_ready(devc))
604 {
605 spin_unlock_irqrestore(&devc->lock,flags);
606 goto retry;
607 }
608 write_command(devc, cmd->cmd);
609
610 ok = 0;
611 for (timeout = 50000; timeout > 0 && !ok; timeout--)
612 {
613 if (input_avail(devc))
614 {
615 if (devc->opened && devc->mode == MODE_SYNTH)
616 {
617 if (mpu_input_scanner(devc, read_data(devc)) == MPU_ACK)
618 ok = 1;
619 }
620 else
621 {
622 /* Device is not currently open. Use simpler method */
623 if (read_data(devc) == MPU_ACK)
624 ok = 1;
625 }
626 }
627 }
628 if (!ok)
629 {
630 spin_unlock_irqrestore(&devc->lock,flags);
631 return -EIO;
632 }
633 if (cmd->nr_args)
634 {
635 for (i = 0; i < cmd->nr_args; i++)
636 {
637 for (timeout = 3000; timeout > 0 && !output_ready(devc); timeout--);
638
639 if (!mpu401_out(dev, cmd->data[i]))
640 {
641 spin_unlock_irqrestore(&devc->lock,flags);
642 printk(KERN_WARNING "mpu401: Command (0x%x), parm send failed.\n", (int) cmd->cmd);
643 return -EIO;
644 }
645 }
646 }
647 cmd->data[0] = 0;
648
649 if (cmd->nr_returns)
650 {
651 for (i = 0; i < cmd->nr_returns; i++)
652 {
653 ok = 0;
654 for (timeout = 5000; timeout > 0 && !ok; timeout--)
655 if (input_avail(devc))
656 {
657 cmd->data[i] = read_data(devc);
658 ok = 1;
659 }
660 if (!ok)
661 {
662 spin_unlock_irqrestore(&devc->lock,flags);
663 return -EIO;
664 }
665 }
666 }
667 spin_unlock_irqrestore(&devc->lock,flags);
668 return 0;
669 }
670
mpu_cmd(int dev,int cmd,int data)671 static int mpu_cmd(int dev, int cmd, int data)
672 {
673 int ret;
674
675 static mpu_command_rec rec;
676
677 rec.cmd = cmd & 0xff;
678 rec.nr_args = ((cmd & 0xf0) == 0xE0);
679 rec.nr_returns = ((cmd & 0xf0) == 0xA0);
680 rec.data[0] = data & 0xff;
681
682 if ((ret = mpu401_command(dev, &rec)) < 0)
683 return ret;
684 return (unsigned char) rec.data[0];
685 }
686
mpu401_prefix_cmd(int dev,unsigned char status)687 static int mpu401_prefix_cmd(int dev, unsigned char status)
688 {
689 struct mpu_config *devc = &dev_conf[dev];
690
691 if (devc->uart_mode)
692 return 1;
693
694 if (status < 0xf0)
695 {
696 if (mpu_cmd(dev, 0xD0, 0) < 0)
697 return 0;
698 return 1;
699 }
700 switch (status)
701 {
702 case 0xF0:
703 if (mpu_cmd(dev, 0xDF, 0) < 0)
704 return 0;
705 return 1;
706
707 default:
708 return 0;
709 }
710 }
711
mpu401_start_read(int dev)712 static int mpu401_start_read(int dev)
713 {
714 return 0;
715 }
716
mpu401_end_read(int dev)717 static int mpu401_end_read(int dev)
718 {
719 return 0;
720 }
721
mpu401_ioctl(int dev,unsigned cmd,void __user * arg)722 static int mpu401_ioctl(int dev, unsigned cmd, void __user *arg)
723 {
724 struct mpu_config *devc;
725 mpu_command_rec rec;
726 int val, ret;
727
728 devc = &dev_conf[dev];
729 switch (cmd)
730 {
731 case SNDCTL_MIDI_MPUMODE:
732 if (!(devc->capabilities & MPU_CAP_INTLG)) { /* No intelligent mode */
733 printk(KERN_WARNING "mpu401: Intelligent mode not supported by the HW\n");
734 return -EINVAL;
735 }
736 if (get_user(val, (int __user *)arg))
737 return -EFAULT;
738 set_uart_mode(dev, devc, !val);
739 return 0;
740
741 case SNDCTL_MIDI_MPUCMD:
742 if (copy_from_user(&rec, arg, sizeof(rec)))
743 return -EFAULT;
744 if ((ret = mpu401_command(dev, &rec)) < 0)
745 return ret;
746 if (copy_to_user(arg, &rec, sizeof(rec)))
747 return -EFAULT;
748 return 0;
749
750 default:
751 return -EINVAL;
752 }
753 }
754
mpu401_kick(int dev)755 static void mpu401_kick(int dev)
756 {
757 }
758
mpu401_buffer_status(int dev)759 static int mpu401_buffer_status(int dev)
760 {
761 return 0; /*
762 * No data in buffers
763 */
764 }
765
mpu_synth_ioctl(int dev,unsigned int cmd,void __user * arg)766 static int mpu_synth_ioctl(int dev, unsigned int cmd, void __user *arg)
767 {
768 int midi_dev;
769 struct mpu_config *devc;
770
771 midi_dev = synth_devs[dev]->midi_dev;
772
773 if (midi_dev < 0 || midi_dev >= num_midis || midi_devs[midi_dev] == NULL)
774 return -ENXIO;
775
776 devc = &dev_conf[midi_dev];
777
778 switch (cmd)
779 {
780
781 case SNDCTL_SYNTH_INFO:
782 if (copy_to_user(arg, &mpu_synth_info[midi_dev],
783 sizeof(struct synth_info)))
784 return -EFAULT;
785 return 0;
786
787 case SNDCTL_SYNTH_MEMAVL:
788 return 0x7fffffff;
789
790 default:
791 return -EINVAL;
792 }
793 }
794
mpu_synth_open(int dev,int mode)795 static int mpu_synth_open(int dev, int mode)
796 {
797 int midi_dev, err;
798 struct mpu_config *devc;
799 struct coproc_operations *coprocessor;
800
801 midi_dev = synth_devs[dev]->midi_dev;
802
803 if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev] == NULL)
804 return -ENXIO;
805
806 devc = &dev_conf[midi_dev];
807
808 /*
809 * Verify that the device is really running.
810 * Some devices (such as Ensoniq SoundScape don't
811 * work before the on board processor (OBP) is initialized
812 * by downloading its microcode.
813 */
814
815 if (!devc->initialized)
816 {
817 if (mpu401_status(devc) == 0xff) /* Bus float */
818 {
819 printk(KERN_ERR "mpu401: Device not initialized properly\n");
820 return -EIO;
821 }
822 reset_mpu401(devc);
823 }
824 if (devc->opened)
825 return -EBUSY;
826 devc->mode = MODE_SYNTH;
827 devc->synthno = dev;
828
829 devc->inputintr = NULL;
830
831 coprocessor = midi_devs[midi_dev]->coproc;
832 if (coprocessor) {
833 if (!try_module_get(coprocessor->owner))
834 return -ENODEV;
835
836 if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0)
837 {
838 printk(KERN_WARNING "mpu401: Can't access coprocessor device\n");
839 return err;
840 }
841 }
842 devc->opened = mode;
843 reset_mpu401(devc);
844
845 if (mode & OPEN_READ)
846 {
847 mpu_cmd(midi_dev, 0x8B, 0); /* Enable data in stop mode */
848 mpu_cmd(midi_dev, 0x34, 0); /* Return timing bytes in stop mode */
849 mpu_cmd(midi_dev, 0x87, 0); /* Enable pitch & controller */
850 }
851 return 0;
852 }
853
mpu_synth_close(int dev)854 static void mpu_synth_close(int dev)
855 {
856 int midi_dev;
857 struct mpu_config *devc;
858 struct coproc_operations *coprocessor;
859
860 midi_dev = synth_devs[dev]->midi_dev;
861
862 devc = &dev_conf[midi_dev];
863 mpu_cmd(midi_dev, 0x15, 0); /* Stop recording, playback and MIDI */
864 mpu_cmd(midi_dev, 0x8a, 0); /* Disable data in stopped mode */
865
866 devc->inputintr = NULL;
867
868 coprocessor = midi_devs[midi_dev]->coproc;
869 if (coprocessor) {
870 coprocessor->close(coprocessor->devc, COPR_MIDI);
871 module_put(coprocessor->owner);
872 }
873 devc->opened = 0;
874 devc->mode = 0;
875 }
876
877 #define MIDI_SYNTH_NAME "MPU-401 UART Midi"
878 #define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
879 #include "midi_synth.h"
880
881 static struct synth_operations mpu401_synth_proto =
882 {
883 .owner = THIS_MODULE,
884 .id = "MPU401",
885 .info = NULL,
886 .midi_dev = 0,
887 .synth_type = SYNTH_TYPE_MIDI,
888 .synth_subtype = 0,
889 .open = mpu_synth_open,
890 .close = mpu_synth_close,
891 .ioctl = mpu_synth_ioctl,
892 .kill_note = midi_synth_kill_note,
893 .start_note = midi_synth_start_note,
894 .set_instr = midi_synth_set_instr,
895 .reset = midi_synth_reset,
896 .hw_control = midi_synth_hw_control,
897 .load_patch = midi_synth_load_patch,
898 .aftertouch = midi_synth_aftertouch,
899 .controller = midi_synth_controller,
900 .panning = midi_synth_panning,
901 .bender = midi_synth_bender,
902 .setup_voice = midi_synth_setup_voice,
903 .send_sysex = midi_synth_send_sysex
904 };
905
906 static struct synth_operations *mpu401_synth_operations[MAX_MIDI_DEV];
907
908 static struct midi_operations mpu401_midi_proto =
909 {
910 .owner = THIS_MODULE,
911 .info = {"MPU-401 Midi", 0, MIDI_CAP_MPU401, SNDCARD_MPU401},
912 .in_info = {0},
913 .open = mpu401_open,
914 .close = mpu401_close,
915 .ioctl = mpu401_ioctl,
916 .outputc = mpu401_out,
917 .start_read = mpu401_start_read,
918 .end_read = mpu401_end_read,
919 .kick = mpu401_kick,
920 .buffer_status = mpu401_buffer_status,
921 .prefix_cmd = mpu401_prefix_cmd
922 };
923
924 static struct midi_operations mpu401_midi_operations[MAX_MIDI_DEV];
925
mpu401_chk_version(int n,struct mpu_config * devc)926 static void mpu401_chk_version(int n, struct mpu_config *devc)
927 {
928 int tmp;
929
930 devc->version = devc->revision = 0;
931
932 tmp = mpu_cmd(n, 0xAC, 0);
933 if (tmp < 0)
934 return;
935 if ((tmp & 0xf0) > 0x20) /* Why it's larger than 2.x ??? */
936 return;
937 devc->version = tmp;
938
939 if ((tmp = mpu_cmd(n, 0xAD, 0)) < 0) {
940 devc->version = 0;
941 return;
942 }
943 devc->revision = tmp;
944 }
945
attach_mpu401(struct address_info * hw_config,struct module * owner)946 int attach_mpu401(struct address_info *hw_config, struct module *owner)
947 {
948 unsigned long flags;
949 char revision_char;
950
951 int m, ret;
952 struct mpu_config *devc;
953
954 hw_config->slots[1] = -1;
955 m = sound_alloc_mididev();
956 if (m == -1)
957 {
958 printk(KERN_WARNING "MPU-401: Too many midi devices detected\n");
959 ret = -ENOMEM;
960 goto out_err;
961 }
962 devc = &dev_conf[m];
963 devc->base = hw_config->io_base;
964 devc->osp = hw_config->osp;
965 devc->irq = hw_config->irq;
966 devc->opened = 0;
967 devc->uart_mode = 0;
968 devc->initialized = 0;
969 devc->version = 0;
970 devc->revision = 0;
971 devc->capabilities = 0;
972 devc->timer_flag = 0;
973 devc->m_busy = 0;
974 devc->m_state = ST_INIT;
975 devc->shared_irq = hw_config->always_detect;
976 spin_lock_init(&devc->lock);
977
978 if (devc->irq < 0)
979 {
980 devc->irq *= -1;
981 devc->shared_irq = 1;
982 }
983
984 if (!hw_config->always_detect)
985 {
986 /* Verify the hardware again */
987 if (!reset_mpu401(devc))
988 {
989 printk(KERN_WARNING "mpu401: Device didn't respond\n");
990 ret = -ENODEV;
991 goto out_mididev;
992 }
993 if (!devc->shared_irq)
994 {
995 if (request_irq(devc->irq, mpuintr, 0, "mpu401",
996 hw_config) < 0)
997 {
998 printk(KERN_WARNING "mpu401: Failed to allocate IRQ%d\n", devc->irq);
999 ret = -ENOMEM;
1000 goto out_mididev;
1001 }
1002 }
1003 spin_lock_irqsave(&devc->lock,flags);
1004 mpu401_chk_version(m, devc);
1005 if (devc->version == 0)
1006 mpu401_chk_version(m, devc);
1007 spin_unlock_irqrestore(&devc->lock, flags);
1008 }
1009
1010 if (devc->version != 0)
1011 if (mpu_cmd(m, 0xC5, 0) >= 0) /* Set timebase OK */
1012 if (mpu_cmd(m, 0xE0, 120) >= 0) /* Set tempo OK */
1013 devc->capabilities |= MPU_CAP_INTLG; /* Supports intelligent mode */
1014
1015
1016 mpu401_synth_operations[m] = kmalloc(sizeof(struct synth_operations), GFP_KERNEL);
1017
1018 if (mpu401_synth_operations[m] == NULL)
1019 {
1020 printk(KERN_ERR "mpu401: Can't allocate memory\n");
1021 ret = -ENOMEM;
1022 goto out_irq;
1023 }
1024 if (!(devc->capabilities & MPU_CAP_INTLG)) /* No intelligent mode */
1025 {
1026 memcpy((char *) mpu401_synth_operations[m],
1027 (char *) &std_midi_synth,
1028 sizeof(struct synth_operations));
1029 }
1030 else
1031 {
1032 memcpy((char *) mpu401_synth_operations[m],
1033 (char *) &mpu401_synth_proto,
1034 sizeof(struct synth_operations));
1035 }
1036 if (owner)
1037 mpu401_synth_operations[m]->owner = owner;
1038
1039 memcpy((char *) &mpu401_midi_operations[m],
1040 (char *) &mpu401_midi_proto,
1041 sizeof(struct midi_operations));
1042
1043 mpu401_midi_operations[m].converter = mpu401_synth_operations[m];
1044
1045 memcpy((char *) &mpu_synth_info[m],
1046 (char *) &mpu_synth_info_proto,
1047 sizeof(struct synth_info));
1048
1049 n_mpu_devs++;
1050
1051 if (devc->version == 0x20 && devc->revision >= 0x07) /* MusicQuest interface */
1052 {
1053 int ports = (devc->revision & 0x08) ? 32 : 16;
1054
1055 devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_SMPTE |
1056 MPU_CAP_CLS | MPU_CAP_2PORT;
1057
1058 revision_char = (devc->revision == 0x7f) ? 'M' : ' ';
1059 sprintf(mpu_synth_info[m].name, "MQX-%d%c MIDI Interface #%d",
1060 ports,
1061 revision_char,
1062 n_mpu_devs);
1063 }
1064 else
1065 {
1066 revision_char = devc->revision ? devc->revision + '@' : ' ';
1067 if ((int) devc->revision > ('Z' - '@'))
1068 revision_char = '+';
1069
1070 devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_FSK;
1071
1072 if (hw_config->name)
1073 sprintf(mpu_synth_info[m].name, "%s (MPU401)", hw_config->name);
1074 else
1075 sprintf(mpu_synth_info[m].name,
1076 "MPU-401 %d.%d%c MIDI #%d",
1077 (int) (devc->version & 0xf0) >> 4,
1078 devc->version & 0x0f,
1079 revision_char,
1080 n_mpu_devs);
1081 }
1082
1083 strcpy(mpu401_midi_operations[m].info.name,
1084 mpu_synth_info[m].name);
1085
1086 conf_printf(mpu_synth_info[m].name, hw_config);
1087
1088 mpu401_synth_operations[m]->midi_dev = devc->devno = m;
1089 mpu401_synth_operations[devc->devno]->info = &mpu_synth_info[devc->devno];
1090
1091 if (devc->capabilities & MPU_CAP_INTLG) /* Intelligent mode */
1092 hw_config->slots[2] = mpu_timer_init(m);
1093
1094 midi_devs[m] = &mpu401_midi_operations[devc->devno];
1095
1096 if (owner)
1097 midi_devs[m]->owner = owner;
1098
1099 hw_config->slots[1] = m;
1100 sequencer_init();
1101
1102 return 0;
1103
1104 out_irq:
1105 free_irq(devc->irq, hw_config);
1106 out_mididev:
1107 sound_unload_mididev(m);
1108 out_err:
1109 release_region(hw_config->io_base, 2);
1110 return ret;
1111 }
1112
reset_mpu401(struct mpu_config * devc)1113 static int reset_mpu401(struct mpu_config *devc)
1114 {
1115 unsigned long flags;
1116 int ok, timeout, n;
1117 int timeout_limit;
1118
1119 /*
1120 * Send the RESET command. Try again if no success at the first time.
1121 * (If the device is in the UART mode, it will not ack the reset cmd).
1122 */
1123
1124 ok = 0;
1125
1126 timeout_limit = devc->initialized ? 30000 : 100000;
1127 devc->initialized = 1;
1128
1129 for (n = 0; n < 2 && !ok; n++)
1130 {
1131 for (timeout = timeout_limit; timeout > 0 && !ok; timeout--)
1132 ok = output_ready(devc);
1133
1134 write_command(devc, MPU_RESET); /*
1135 * Send MPU-401 RESET Command
1136 */
1137
1138 /*
1139 * Wait at least 25 msec. This method is not accurate so let's make the
1140 * loop bit longer. Cannot sleep since this is called during boot.
1141 */
1142
1143 for (timeout = timeout_limit * 2; timeout > 0 && !ok; timeout--)
1144 {
1145 spin_lock_irqsave(&devc->lock,flags);
1146 if (input_avail(devc))
1147 if (read_data(devc) == MPU_ACK)
1148 ok = 1;
1149 spin_unlock_irqrestore(&devc->lock,flags);
1150 }
1151
1152 }
1153
1154 devc->m_state = ST_INIT;
1155 devc->m_ptr = 0;
1156 devc->m_left = 0;
1157 devc->last_status = 0;
1158 devc->uart_mode = 0;
1159
1160 return ok;
1161 }
1162
set_uart_mode(int dev,struct mpu_config * devc,int arg)1163 static void set_uart_mode(int dev, struct mpu_config *devc, int arg)
1164 {
1165 if (!arg && (devc->capabilities & MPU_CAP_INTLG))
1166 return;
1167 if ((devc->uart_mode == 0) == (arg == 0))
1168 return; /* Already set */
1169 reset_mpu401(devc); /* This exits the uart mode */
1170
1171 if (arg)
1172 {
1173 if (mpu_cmd(dev, UART_MODE_ON, 0) < 0)
1174 {
1175 printk(KERN_ERR "mpu401: Can't enter UART mode\n");
1176 devc->uart_mode = 0;
1177 return;
1178 }
1179 }
1180 devc->uart_mode = arg;
1181
1182 }
1183
probe_mpu401(struct address_info * hw_config,struct resource * ports)1184 int probe_mpu401(struct address_info *hw_config, struct resource *ports)
1185 {
1186 int ok = 0;
1187 struct mpu_config tmp_devc;
1188
1189 tmp_devc.base = hw_config->io_base;
1190 tmp_devc.irq = hw_config->irq;
1191 tmp_devc.initialized = 0;
1192 tmp_devc.opened = 0;
1193 tmp_devc.osp = hw_config->osp;
1194
1195 if (hw_config->always_detect)
1196 return 1;
1197
1198 if (inb(hw_config->io_base + 1) == 0xff)
1199 {
1200 DDB(printk("MPU401: Port %x looks dead.\n", hw_config->io_base));
1201 return 0; /* Just bus float? */
1202 }
1203 ok = reset_mpu401(&tmp_devc);
1204
1205 if (!ok)
1206 {
1207 DDB(printk("MPU401: Reset failed on port %x\n", hw_config->io_base));
1208 }
1209 return ok;
1210 }
1211
unload_mpu401(struct address_info * hw_config)1212 void unload_mpu401(struct address_info *hw_config)
1213 {
1214 void *p;
1215 int n=hw_config->slots[1];
1216
1217 if (n != -1) {
1218 release_region(hw_config->io_base, 2);
1219 if (hw_config->always_detect == 0 && hw_config->irq > 0)
1220 free_irq(hw_config->irq, hw_config);
1221 p=mpu401_synth_operations[n];
1222 sound_unload_mididev(n);
1223 sound_unload_timerdev(hw_config->slots[2]);
1224 kfree(p);
1225 }
1226 }
1227
1228 /*****************************************************
1229 * Timer stuff
1230 ****************************************************/
1231
1232 static volatile int timer_initialized = 0, timer_open = 0, tmr_running = 0;
1233 static volatile int curr_tempo, curr_timebase, hw_timebase;
1234 static int max_timebase = 8; /* 8*24=192 ppqn */
1235 static volatile unsigned long next_event_time;
1236 static volatile unsigned long curr_ticks, curr_clocks;
1237 static unsigned long prev_event_time;
1238 static int metronome_mode;
1239
clocks2ticks(unsigned long clocks)1240 static unsigned long clocks2ticks(unsigned long clocks)
1241 {
1242 /*
1243 * The MPU-401 supports just a limited set of possible timebase values.
1244 * Since the applications require more choices, the driver has to
1245 * program the HW to do its best and to convert between the HW and
1246 * actual timebases.
1247 */
1248 return ((clocks * curr_timebase) + (hw_timebase / 2)) / hw_timebase;
1249 }
1250
set_timebase(int midi_dev,int val)1251 static void set_timebase(int midi_dev, int val)
1252 {
1253 int hw_val;
1254
1255 if (val < 48)
1256 val = 48;
1257 if (val > 1000)
1258 val = 1000;
1259
1260 hw_val = val;
1261 hw_val = (hw_val + 12) / 24;
1262 if (hw_val > max_timebase)
1263 hw_val = max_timebase;
1264
1265 if (mpu_cmd(midi_dev, 0xC0 | (hw_val & 0x0f), 0) < 0)
1266 {
1267 printk(KERN_WARNING "mpu401: Can't set HW timebase to %d\n", hw_val * 24);
1268 return;
1269 }
1270 hw_timebase = hw_val * 24;
1271 curr_timebase = val;
1272
1273 }
1274
tmr_reset(struct mpu_config * devc)1275 static void tmr_reset(struct mpu_config *devc)
1276 {
1277 unsigned long flags;
1278
1279 spin_lock_irqsave(&devc->lock,flags);
1280 next_event_time = (unsigned long) -1;
1281 prev_event_time = 0;
1282 curr_ticks = curr_clocks = 0;
1283 spin_unlock_irqrestore(&devc->lock,flags);
1284 }
1285
set_timer_mode(int midi_dev)1286 static void set_timer_mode(int midi_dev)
1287 {
1288 if (timer_mode & TMR_MODE_CLS)
1289 mpu_cmd(midi_dev, 0x3c, 0); /* Use CLS sync */
1290 else if (timer_mode & TMR_MODE_SMPTE)
1291 mpu_cmd(midi_dev, 0x3d, 0); /* Use SMPTE sync */
1292
1293 if (timer_mode & TMR_INTERNAL)
1294 {
1295 mpu_cmd(midi_dev, 0x80, 0); /* Use MIDI sync */
1296 }
1297 else
1298 {
1299 if (timer_mode & (TMR_MODE_MIDI | TMR_MODE_CLS))
1300 {
1301 mpu_cmd(midi_dev, 0x82, 0); /* Use MIDI sync */
1302 mpu_cmd(midi_dev, 0x91, 0); /* Enable ext MIDI ctrl */
1303 }
1304 else if (timer_mode & TMR_MODE_FSK)
1305 mpu_cmd(midi_dev, 0x81, 0); /* Use FSK sync */
1306 }
1307 }
1308
stop_metronome(int midi_dev)1309 static void stop_metronome(int midi_dev)
1310 {
1311 mpu_cmd(midi_dev, 0x84, 0); /* Disable metronome */
1312 }
1313
setup_metronome(int midi_dev)1314 static void setup_metronome(int midi_dev)
1315 {
1316 int numerator, denominator;
1317 int clks_per_click, num_32nds_per_beat;
1318 int beats_per_measure;
1319
1320 numerator = ((unsigned) metronome_mode >> 24) & 0xff;
1321 denominator = ((unsigned) metronome_mode >> 16) & 0xff;
1322 clks_per_click = ((unsigned) metronome_mode >> 8) & 0xff;
1323 num_32nds_per_beat = (unsigned) metronome_mode & 0xff;
1324 beats_per_measure = (numerator * 4) >> denominator;
1325
1326 if (!metronome_mode)
1327 mpu_cmd(midi_dev, 0x84, 0); /* Disable metronome */
1328 else
1329 {
1330 mpu_cmd(midi_dev, 0xE4, clks_per_click);
1331 mpu_cmd(midi_dev, 0xE6, beats_per_measure);
1332 mpu_cmd(midi_dev, 0x83, 0); /* Enable metronome without accents */
1333 }
1334 }
1335
mpu_start_timer(int midi_dev)1336 static int mpu_start_timer(int midi_dev)
1337 {
1338 struct mpu_config *devc= &dev_conf[midi_dev];
1339
1340 tmr_reset(devc);
1341 set_timer_mode(midi_dev);
1342
1343 if (tmr_running)
1344 return TIMER_NOT_ARMED; /* Already running */
1345
1346 if (timer_mode & TMR_INTERNAL)
1347 {
1348 mpu_cmd(midi_dev, 0x02, 0); /* Send MIDI start */
1349 tmr_running = 1;
1350 return TIMER_NOT_ARMED;
1351 }
1352 else
1353 {
1354 mpu_cmd(midi_dev, 0x35, 0); /* Enable mode messages to PC */
1355 mpu_cmd(midi_dev, 0x38, 0); /* Enable sys common messages to PC */
1356 mpu_cmd(midi_dev, 0x39, 0); /* Enable real time messages to PC */
1357 mpu_cmd(midi_dev, 0x97, 0); /* Enable system exclusive messages to PC */
1358 }
1359 return TIMER_ARMED;
1360 }
1361
mpu_timer_open(int dev,int mode)1362 static int mpu_timer_open(int dev, int mode)
1363 {
1364 int midi_dev = sound_timer_devs[dev]->devlink;
1365 struct mpu_config *devc= &dev_conf[midi_dev];
1366
1367 if (timer_open)
1368 return -EBUSY;
1369
1370 tmr_reset(devc);
1371 curr_tempo = 50;
1372 mpu_cmd(midi_dev, 0xE0, 50);
1373 curr_timebase = hw_timebase = 120;
1374 set_timebase(midi_dev, 120);
1375 timer_open = 1;
1376 metronome_mode = 0;
1377 set_timer_mode(midi_dev);
1378
1379 mpu_cmd(midi_dev, 0xe7, 0x04); /* Send all clocks to host */
1380 mpu_cmd(midi_dev, 0x95, 0); /* Enable clock to host */
1381
1382 return 0;
1383 }
1384
mpu_timer_close(int dev)1385 static void mpu_timer_close(int dev)
1386 {
1387 int midi_dev = sound_timer_devs[dev]->devlink;
1388
1389 timer_open = tmr_running = 0;
1390 mpu_cmd(midi_dev, 0x15, 0); /* Stop all */
1391 mpu_cmd(midi_dev, 0x94, 0); /* Disable clock to host */
1392 mpu_cmd(midi_dev, 0x8c, 0); /* Disable measure end messages to host */
1393 stop_metronome(midi_dev);
1394 }
1395
mpu_timer_event(int dev,unsigned char * event)1396 static int mpu_timer_event(int dev, unsigned char *event)
1397 {
1398 unsigned char command = event[1];
1399 unsigned long parm = *(unsigned int *) &event[4];
1400 int midi_dev = sound_timer_devs[dev]->devlink;
1401
1402 switch (command)
1403 {
1404 case TMR_WAIT_REL:
1405 parm += prev_event_time;
1406 case TMR_WAIT_ABS:
1407 if (parm > 0)
1408 {
1409 long time;
1410
1411 if (parm <= curr_ticks) /* It's the time */
1412 return TIMER_NOT_ARMED;
1413 time = parm;
1414 next_event_time = prev_event_time = time;
1415
1416 return TIMER_ARMED;
1417 }
1418 break;
1419
1420 case TMR_START:
1421 if (tmr_running)
1422 break;
1423 return mpu_start_timer(midi_dev);
1424
1425 case TMR_STOP:
1426 mpu_cmd(midi_dev, 0x01, 0); /* Send MIDI stop */
1427 stop_metronome(midi_dev);
1428 tmr_running = 0;
1429 break;
1430
1431 case TMR_CONTINUE:
1432 if (tmr_running)
1433 break;
1434 mpu_cmd(midi_dev, 0x03, 0); /* Send MIDI continue */
1435 setup_metronome(midi_dev);
1436 tmr_running = 1;
1437 break;
1438
1439 case TMR_TEMPO:
1440 if (parm)
1441 {
1442 if (parm < 8)
1443 parm = 8;
1444 if (parm > 250)
1445 parm = 250;
1446 if (mpu_cmd(midi_dev, 0xE0, parm) < 0)
1447 printk(KERN_WARNING "mpu401: Can't set tempo to %d\n", (int) parm);
1448 curr_tempo = parm;
1449 }
1450 break;
1451
1452 case TMR_ECHO:
1453 seq_copy_to_input(event, 8);
1454 break;
1455
1456 case TMR_TIMESIG:
1457 if (metronome_mode) /* Metronome enabled */
1458 {
1459 metronome_mode = parm;
1460 setup_metronome(midi_dev);
1461 }
1462 break;
1463
1464 default:;
1465 }
1466 return TIMER_NOT_ARMED;
1467 }
1468
mpu_timer_get_time(int dev)1469 static unsigned long mpu_timer_get_time(int dev)
1470 {
1471 if (!timer_open)
1472 return 0;
1473
1474 return curr_ticks;
1475 }
1476
mpu_timer_ioctl(int dev,unsigned int command,void __user * arg)1477 static int mpu_timer_ioctl(int dev, unsigned int command, void __user *arg)
1478 {
1479 int midi_dev = sound_timer_devs[dev]->devlink;
1480 int __user *p = (int __user *)arg;
1481
1482 switch (command)
1483 {
1484 case SNDCTL_TMR_SOURCE:
1485 {
1486 int parm;
1487
1488 if (get_user(parm, p))
1489 return -EFAULT;
1490 parm &= timer_caps;
1491
1492 if (parm != 0)
1493 {
1494 timer_mode = parm;
1495
1496 if (timer_mode & TMR_MODE_CLS)
1497 mpu_cmd(midi_dev, 0x3c, 0); /* Use CLS sync */
1498 else if (timer_mode & TMR_MODE_SMPTE)
1499 mpu_cmd(midi_dev, 0x3d, 0); /* Use SMPTE sync */
1500 }
1501 if (put_user(timer_mode, p))
1502 return -EFAULT;
1503 return timer_mode;
1504 }
1505 break;
1506
1507 case SNDCTL_TMR_START:
1508 mpu_start_timer(midi_dev);
1509 return 0;
1510
1511 case SNDCTL_TMR_STOP:
1512 tmr_running = 0;
1513 mpu_cmd(midi_dev, 0x01, 0); /* Send MIDI stop */
1514 stop_metronome(midi_dev);
1515 return 0;
1516
1517 case SNDCTL_TMR_CONTINUE:
1518 if (tmr_running)
1519 return 0;
1520 tmr_running = 1;
1521 mpu_cmd(midi_dev, 0x03, 0); /* Send MIDI continue */
1522 return 0;
1523
1524 case SNDCTL_TMR_TIMEBASE:
1525 {
1526 int val;
1527 if (get_user(val, p))
1528 return -EFAULT;
1529 if (val)
1530 set_timebase(midi_dev, val);
1531 if (put_user(curr_timebase, p))
1532 return -EFAULT;
1533 return curr_timebase;
1534 }
1535 break;
1536
1537 case SNDCTL_TMR_TEMPO:
1538 {
1539 int val;
1540 int ret;
1541
1542 if (get_user(val, p))
1543 return -EFAULT;
1544
1545 if (val)
1546 {
1547 if (val < 8)
1548 val = 8;
1549 if (val > 250)
1550 val = 250;
1551 if ((ret = mpu_cmd(midi_dev, 0xE0, val)) < 0)
1552 {
1553 printk(KERN_WARNING "mpu401: Can't set tempo to %d\n", (int) val);
1554 return ret;
1555 }
1556 curr_tempo = val;
1557 }
1558 if (put_user(curr_tempo, p))
1559 return -EFAULT;
1560 return curr_tempo;
1561 }
1562 break;
1563
1564 case SNDCTL_SEQ_CTRLRATE:
1565 {
1566 int val;
1567 if (get_user(val, p))
1568 return -EFAULT;
1569
1570 if (val != 0) /* Can't change */
1571 return -EINVAL;
1572 val = ((curr_tempo * curr_timebase) + 30)/60;
1573 if (put_user(val, p))
1574 return -EFAULT;
1575 return val;
1576 }
1577 break;
1578
1579 case SNDCTL_SEQ_GETTIME:
1580 if (put_user(curr_ticks, p))
1581 return -EFAULT;
1582 return curr_ticks;
1583
1584 case SNDCTL_TMR_METRONOME:
1585 if (get_user(metronome_mode, p))
1586 return -EFAULT;
1587 setup_metronome(midi_dev);
1588 return 0;
1589
1590 default:;
1591 }
1592 return -EINVAL;
1593 }
1594
mpu_timer_arm(int dev,long time)1595 static void mpu_timer_arm(int dev, long time)
1596 {
1597 if (time < 0)
1598 time = curr_ticks + 1;
1599 else if (time <= curr_ticks) /* It's the time */
1600 return;
1601 next_event_time = prev_event_time = time;
1602 return;
1603 }
1604
1605 static struct sound_timer_operations mpu_timer =
1606 {
1607 .owner = THIS_MODULE,
1608 .info = {"MPU-401 Timer", 0},
1609 .priority = 10, /* Priority */
1610 .devlink = 0, /* Local device link */
1611 .open = mpu_timer_open,
1612 .close = mpu_timer_close,
1613 .event = mpu_timer_event,
1614 .get_time = mpu_timer_get_time,
1615 .ioctl = mpu_timer_ioctl,
1616 .arm_timer = mpu_timer_arm
1617 };
1618
mpu_timer_interrupt(void)1619 static void mpu_timer_interrupt(void)
1620 {
1621 if (!timer_open)
1622 return;
1623
1624 if (!tmr_running)
1625 return;
1626
1627 curr_clocks++;
1628 curr_ticks = clocks2ticks(curr_clocks);
1629
1630 if (curr_ticks >= next_event_time)
1631 {
1632 next_event_time = (unsigned long) -1;
1633 sequencer_timer(0);
1634 }
1635 }
1636
timer_ext_event(struct mpu_config * devc,int event,int parm)1637 static void timer_ext_event(struct mpu_config *devc, int event, int parm)
1638 {
1639 int midi_dev = devc->devno;
1640
1641 if (!devc->timer_flag)
1642 return;
1643
1644 switch (event)
1645 {
1646 case TMR_CLOCK:
1647 printk("<MIDI clk>");
1648 break;
1649
1650 case TMR_START:
1651 printk("Ext MIDI start\n");
1652 if (!tmr_running)
1653 {
1654 if (timer_mode & TMR_EXTERNAL)
1655 {
1656 tmr_running = 1;
1657 setup_metronome(midi_dev);
1658 next_event_time = 0;
1659 STORE(SEQ_START_TIMER());
1660 }
1661 }
1662 break;
1663
1664 case TMR_STOP:
1665 printk("Ext MIDI stop\n");
1666 if (timer_mode & TMR_EXTERNAL)
1667 {
1668 tmr_running = 0;
1669 stop_metronome(midi_dev);
1670 STORE(SEQ_STOP_TIMER());
1671 }
1672 break;
1673
1674 case TMR_CONTINUE:
1675 printk("Ext MIDI continue\n");
1676 if (timer_mode & TMR_EXTERNAL)
1677 {
1678 tmr_running = 1;
1679 setup_metronome(midi_dev);
1680 STORE(SEQ_CONTINUE_TIMER());
1681 }
1682 break;
1683
1684 case TMR_SPP:
1685 printk("Songpos: %d\n", parm);
1686 if (timer_mode & TMR_EXTERNAL)
1687 {
1688 STORE(SEQ_SONGPOS(parm));
1689 }
1690 break;
1691 }
1692 }
1693
mpu_timer_init(int midi_dev)1694 static int mpu_timer_init(int midi_dev)
1695 {
1696 struct mpu_config *devc;
1697 int n;
1698
1699 devc = &dev_conf[midi_dev];
1700
1701 if (timer_initialized)
1702 return -1; /* There is already a similar timer */
1703
1704 timer_initialized = 1;
1705
1706 mpu_timer.devlink = midi_dev;
1707 dev_conf[midi_dev].timer_flag = 1;
1708
1709 n = sound_alloc_timerdev();
1710 if (n == -1)
1711 n = 0;
1712 sound_timer_devs[n] = &mpu_timer;
1713
1714 if (devc->version < 0x20) /* Original MPU-401 */
1715 timer_caps = TMR_INTERNAL | TMR_EXTERNAL | TMR_MODE_FSK | TMR_MODE_MIDI;
1716 else
1717 {
1718 /*
1719 * The version number 2.0 is used (at least) by the
1720 * MusicQuest cards and the Roland Super-MPU.
1721 *
1722 * MusicQuest has given a special meaning to the bits of the
1723 * revision number. The Super-MPU returns 0.
1724 */
1725
1726 if (devc->revision)
1727 timer_caps |= TMR_EXTERNAL | TMR_MODE_MIDI;
1728
1729 if (devc->revision & 0x02)
1730 timer_caps |= TMR_MODE_CLS;
1731
1732
1733 if (devc->revision & 0x40)
1734 max_timebase = 10; /* Has the 216 and 240 ppqn modes */
1735 }
1736
1737 timer_mode = (TMR_INTERNAL | TMR_MODE_MIDI) & timer_caps;
1738 return n;
1739
1740 }
1741
1742 EXPORT_SYMBOL(probe_mpu401);
1743 EXPORT_SYMBOL(attach_mpu401);
1744 EXPORT_SYMBOL(unload_mpu401);
1745
1746 static struct address_info cfg;
1747
1748 static int io = -1;
1749 static int irq = -1;
1750
1751 module_param(irq, int, 0);
1752 module_param(io, int, 0);
1753
init_mpu401(void)1754 static int __init init_mpu401(void)
1755 {
1756 int ret;
1757 /* Can be loaded either for module use or to provide functions
1758 to others */
1759 if (io != -1 && irq != -1) {
1760 struct resource *ports;
1761 cfg.irq = irq;
1762 cfg.io_base = io;
1763 ports = request_region(io, 2, "mpu401");
1764 if (!ports)
1765 return -EBUSY;
1766 if (probe_mpu401(&cfg, ports) == 0) {
1767 release_region(io, 2);
1768 return -ENODEV;
1769 }
1770 if ((ret = attach_mpu401(&cfg, THIS_MODULE)))
1771 return ret;
1772 }
1773
1774 return 0;
1775 }
1776
cleanup_mpu401(void)1777 static void __exit cleanup_mpu401(void)
1778 {
1779 if (io != -1 && irq != -1) {
1780 /* Check for use by, for example, sscape driver */
1781 unload_mpu401(&cfg);
1782 }
1783 }
1784
1785 module_init(init_mpu401);
1786 module_exit(cleanup_mpu401);
1787
1788 #ifndef MODULE
setup_mpu401(char * str)1789 static int __init setup_mpu401(char *str)
1790 {
1791 /* io, irq */
1792 int ints[3];
1793
1794 str = get_options(str, ARRAY_SIZE(ints), ints);
1795
1796 io = ints[1];
1797 irq = ints[2];
1798
1799 return 1;
1800 }
1801
1802 __setup("mpu401=", setup_mpu401);
1803 #endif
1804 MODULE_LICENSE("GPL");
1805