4 * The low level driver for the WaveFront ICS2115 MIDI interface(s)
5 * Note that there is also an MPU-401 emulation (actually, a UART-401
6 * emulation) on the CS4232 on the Tropez Plus. This code has nothing
7 * to do with that interface at all.
9 * The interface is essentially just a UART-401, but is has the
10 * interesting property of supporting what Turtle Beach called
11 * "Virtual MIDI" mode. In this mode, there are effectively *two*
12 * MIDI buses accessible via the interface, one that is routed
13 * solely to/from the external WaveFront synthesizer and the other
14 * corresponding to the pin/socket connector used to link external
15 * MIDI devices to the board.
17 * This driver fully supports this mode, allowing two distinct
18 * midi devices (/dev/midiNN and /dev/midiNN+1) to be used
19 * completely independently, giving 32 channels of MIDI routing,
20 * 16 to the WaveFront synth and 16 to the external MIDI bus.
22 * Switching between the two is accomplished externally by the driver
23 * using the two otherwise unused MIDI bytes. See the code for more details.
25 * NOTE: VIRTUAL MIDI MODE IS ON BY DEFAULT (see wavefront.c)
27 * The main reason to turn off Virtual MIDI mode is when you want to
28 * tightly couple the WaveFront synth with an external MIDI
29 * device. You won't be able to distinguish the source of any MIDI
30 * data except via SysEx ID, but thats probably OK, since for the most
31 * part, the WaveFront won't be sending any MIDI data at all.
33 * The main reason to turn on Virtual MIDI Mode is to provide two
34 * completely independent 16-channel MIDI buses, one to the
35 * WaveFront and one to any external MIDI devices. Given the 32
36 * voice nature of the WaveFront, its pretty easy to find a use
37 * for all 16 channels driving just that synth.
42 * Copyright (C) by Paul Barton-Davis 1998
43 * Some portions of this file are derived from work that is:
45 * CopyriGht (C) by Hannu Savolainen 1993-1996
47 * USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
48 * Version 2 (June 1991). See the "COPYING" file distributed with this software
52 #include <linux/init.h>
53 #include <linux/interrupt.h>
54 #include <linux/spinlock.h>
55 #include "sound_config.h"
57 #include <linux/wavefront.h>
61 struct wf_mpu_config {
63 #define DATAPORT(d) (d)->base
64 #define COMDPORT(d) (d)->base+1
65 #define STATPORT(d) (d)->base+1
75 void (*inputintr) (int dev, unsigned char data);
76 char isvirtual; /* do virtual I/O stuff */
79 static struct wf_mpu_config devs[2];
80 static struct wf_mpu_config *phys_dev = &devs[0];
81 static struct wf_mpu_config *virt_dev = &devs[1];
83 static void start_uart_mode (void);
84 static DEFINE_SPINLOCK(lock);
86 #define OUTPUT_READY 0x40
87 #define INPUT_AVAIL 0x80
89 #define UART_MODE_ON 0x3F
91 static inline int wf_mpu_status (void)
93 return inb (STATPORT (phys_dev));
96 static inline int input_avail (void)
98 return !(wf_mpu_status() & INPUT_AVAIL);
101 static inline int output_ready (void)
103 return !(wf_mpu_status() & OUTPUT_READY);
106 static inline int read_data (void)
108 return inb (DATAPORT (phys_dev));
111 static inline void write_data (unsigned char byte)
113 outb (byte, DATAPORT (phys_dev));
117 * States for the input scanner (should be in dev_table.h)
120 #define MST_SYSMSG 100 /* System message (sysx etc). */
121 #define MST_MTC 102 /* Midi Time Code (MTC) qframe msg */
122 #define MST_SONGSEL 103 /* Song select */
123 #define MST_SONGPOS 104 /* Song position pointer */
124 #define MST_TIMED 105 /* Leading timing byte rcvd */
126 /* buffer space check for input scanner */
128 #define BUFTEST(mi) if (mi->m_ptr >= MI_MAX || mi->m_ptr < 0) \
129 {printk(KERN_ERR "WF-MPU: Invalid buffer pointer %d/%d, s=%d\n", \
130 mi->m_ptr, mi->m_left, mi->m_state);mi->m_ptr--;}
132 static unsigned char len_tab[] = /* # of data bytes following a status
146 wf_mpu_input_scanner (int devno, int synthdev, unsigned char midic)
149 struct midi_input_info *mi = &midi_devs[devno]->in_info;
151 switch (mi->m_state) {
162 /* XXX do something useful with this. If there is
163 an external MIDI timer (e.g. a hardware sequencer,
164 a useful timer can be derived ...
166 For now, no timer support.
188 mi->m_state = MST_SYSMSG;
193 mi->m_state = MST_TIMED;
196 printk (KERN_ERR "<MPU: Unknown event %02x> ",
203 int msg = ((int) (midic & 0xf0) >> 4);
205 mi->m_state = MST_DATA;
207 if (msg < 8) { /* Data byte */
209 msg = ((int) (mi->m_prev_status & 0xf0) >> 4);
211 mi->m_left = len_tab[msg] - 1;
214 mi->m_buf[0] = mi->m_prev_status;
215 mi->m_buf[1] = midic;
217 if (mi->m_left <= 0) {
218 mi->m_state = MST_INIT;
219 do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
222 } else if (msg == 0xf) { /* MPU MARK */
224 mi->m_state = MST_INIT;
240 mi->m_prev_status = midic;
242 mi->m_left = len_tab[msg];
245 mi->m_buf[0] = midic;
247 if (mi->m_left <= 0) {
248 mi->m_state = MST_INIT;
249 do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
259 mi->m_state = MST_SYSEX;
263 mi->m_state = MST_MTC;
267 mi->m_state = MST_SONGPOS;
272 mi->m_state = MST_SONGSEL;
276 mi->m_state = MST_INIT;
283 mi->m_state = MST_INIT;
284 /* XXX need ext MIDI timer support */
288 mi->m_state = MST_INIT;
289 /* XXX need ext MIDI timer support */
293 mi->m_state = MST_INIT;
294 /* XXX need ext MIDI timer support */
298 mi->m_state = MST_INIT;
299 /* XXX need ext MIDI timer support */
304 mi->m_state = MST_INIT;
308 mi->m_state = MST_INIT;
312 printk (KERN_ERR "unknown MIDI sysmsg %0x\n", midic);
313 mi->m_state = MST_INIT;
318 mi->m_state = MST_INIT;
323 mi->m_state = MST_INIT;
331 mi->m_buf[mi->m_ptr++] = midic;
332 if (mi->m_ptr == 2) {
333 mi->m_state = MST_INIT;
335 /* XXX need ext MIDI timer support */
341 mi->m_buf[mi->m_ptr++] = midic;
342 if ((--mi->m_left) <= 0) {
343 mi->m_state = MST_INIT;
344 do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
350 printk (KERN_ERR "Bad state %d ", mi->m_state);
351 mi->m_state = MST_INIT;
358 wf_mpuintr(int irq, void *dev_id, struct pt_regs *dummy)
361 struct wf_mpu_config *physical_dev = dev_id;
362 static struct wf_mpu_config *input_dev;
363 struct midi_input_info *mi = &midi_devs[physical_dev->devno]->in_info;
366 if (!input_avail()) { /* not for us */
376 input_dev = physical_dev;
379 n = 50; /* XXX why ? */
382 unsigned char c = read_data ();
384 if (phys_dev->isvirtual) {
386 if (c == WF_EXTERNAL_SWITCH) {
387 input_dev = virt_dev;
389 } else if (c == WF_INTERNAL_SWITCH) {
390 input_dev = phys_dev;
392 } /* else just leave it as it is */
395 input_dev = phys_dev;
398 if (input_dev->mode == MODE_SYNTH) {
400 wf_mpu_input_scanner (input_dev->devno,
401 input_dev->synthno, c);
403 } else if (input_dev->opened & OPEN_READ) {
405 if (input_dev->inputintr) {
406 input_dev->inputintr (input_dev->devno, c);
410 } while (input_avail() && n-- > 0);
418 wf_mpu_open (int dev, int mode,
419 void (*input) (int dev, unsigned char data),
420 void (*output) (int dev)
423 struct wf_mpu_config *devc;
425 if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
428 if (phys_dev->devno == dev) {
430 } else if (phys_dev->isvirtual && virt_dev->devno == dev) {
433 printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
441 devc->mode = MODE_MIDI;
445 devc->inputintr = input;
450 wf_mpu_close (int dev)
452 struct wf_mpu_config *devc;
454 if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
457 if (phys_dev->devno == dev) {
459 } else if (phys_dev->isvirtual && virt_dev->devno == dev) {
462 printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
467 devc->inputintr = NULL;
472 wf_mpu_out (int dev, unsigned char midi_byte)
476 static int lastoutdev = -1;
477 unsigned char switchch;
479 if (phys_dev->isvirtual && lastoutdev != dev) {
481 if (dev == phys_dev->devno) {
482 switchch = WF_INTERNAL_SWITCH;
483 } else if (dev == virt_dev->devno) {
484 switchch = WF_EXTERNAL_SWITCH;
486 printk (KERN_ERR "WF-MPU: bad device number %d", dev);
492 for (timeout = 30000; timeout > 0 && !output_ready ();
495 spin_lock_irqsave(&lock,flags);
497 if (!output_ready ()) {
498 printk (KERN_WARNING "WF-MPU: Send switch "
500 spin_unlock_irqrestore(&lock,flags);
504 write_data (switchch);
505 spin_unlock_irqrestore(&lock,flags);
511 * Sometimes it takes about 30000 loops before the output becomes ready
512 * (After reset). Normally it takes just about 10 loops.
517 for (timeout = 30000; timeout > 0 && !output_ready (); timeout--);
519 spin_lock_irqsave(&lock,flags);
520 if (!output_ready ()) {
521 spin_unlock_irqrestore(&lock,flags);
522 printk (KERN_WARNING "WF-MPU: Send data timeout\n");
526 write_data (midi_byte);
527 spin_unlock_irqrestore(&lock,flags);
532 static inline int wf_mpu_start_read (int dev) {
536 static inline int wf_mpu_end_read (int dev) {
540 static int wf_mpu_ioctl (int dev, unsigned cmd, void __user *arg)
543 "WF-MPU: Intelligent mode not supported by hardware.\n");
547 static int wf_mpu_buffer_status (int dev)
552 static struct synth_operations wf_mpu_synth_operations[2];
553 static struct midi_operations wf_mpu_midi_operations[2];
555 static struct midi_operations wf_mpu_midi_proto =
557 .owner = THIS_MODULE,
558 .info = {"WF-MPU MIDI", 0, MIDI_CAP_MPU401, SNDCARD_MPU401},
559 .in_info = {0}, /* in_info */
561 .close = wf_mpu_close,
562 .ioctl = wf_mpu_ioctl,
563 .outputc = wf_mpu_out,
564 .start_read = wf_mpu_start_read,
565 .end_read = wf_mpu_end_read,
566 .buffer_status = wf_mpu_buffer_status,
569 static struct synth_info wf_mpu_synth_info_proto =
570 {"WaveFront MPU-401 interface", 0,
571 SYNTH_TYPE_MIDI, MIDI_TYPE_MPU401, 0, 128, 0, 128, SYNTH_CAP_INPUT};
573 static struct synth_info wf_mpu_synth_info[2];
576 wf_mpu_synth_ioctl (int dev, unsigned int cmd, void __user *arg)
581 midi_dev = synth_devs[dev]->midi_dev;
583 if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev]==NULL)
586 if (midi_dev == phys_dev->devno) {
588 } else if (phys_dev->isvirtual && midi_dev == virt_dev->devno) {
596 case SNDCTL_SYNTH_INFO:
597 if (copy_to_user(arg,
598 &wf_mpu_synth_info[index],
599 sizeof (struct synth_info)))
603 case SNDCTL_SYNTH_MEMAVL:
612 wf_mpu_synth_open (int dev, int mode)
615 struct wf_mpu_config *devc;
617 midi_dev = synth_devs[dev]->midi_dev;
619 if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev]==NULL) {
623 if (phys_dev->devno == midi_dev) {
625 } else if (phys_dev->isvirtual && virt_dev->devno == midi_dev) {
628 printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
636 devc->mode = MODE_SYNTH;
639 devc->inputintr = NULL;
644 wf_mpu_synth_close (int dev)
647 struct wf_mpu_config *devc;
649 midi_dev = synth_devs[dev]->midi_dev;
651 if (phys_dev->devno == midi_dev) {
653 } else if (phys_dev->isvirtual && virt_dev->devno == midi_dev) {
656 printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
660 devc->inputintr = NULL;
665 #define _MIDI_SYNTH_C_
666 #define MIDI_SYNTH_NAME "WaveFront (MIDI)"
667 #define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
668 #include "midi_synth.h"
670 static struct synth_operations wf_mpu_synth_proto =
672 .owner = THIS_MODULE,
673 .id = "WaveFront (ICS2115)",
674 .info = NULL, /* info field, filled in during configuration */
675 .midi_dev = 0, /* MIDI dev XXX should this be -1 ? */
676 .synth_type = SYNTH_TYPE_MIDI,
677 .synth_subtype = SAMPLE_TYPE_WAVEFRONT,
678 .open = wf_mpu_synth_open,
679 .close = wf_mpu_synth_close,
680 .ioctl = wf_mpu_synth_ioctl,
681 .kill_note = midi_synth_kill_note,
682 .start_note = midi_synth_start_note,
683 .set_instr = midi_synth_set_instr,
684 .reset = midi_synth_reset,
685 .hw_control = midi_synth_hw_control,
686 .load_patch = midi_synth_load_patch,
687 .aftertouch = midi_synth_aftertouch,
688 .controller = midi_synth_controller,
689 .panning = midi_synth_panning,
690 .bender = midi_synth_bender,
691 .setup_voice = midi_synth_setup_voice,
692 .send_sysex = midi_synth_send_sysex
696 config_wf_mpu (struct wf_mpu_config *dev)
703 if (dev == phys_dev) {
704 name = "WaveFront internal MIDI";
707 memcpy ((char *) &wf_mpu_synth_operations[index],
708 (char *) &wf_mpu_synth_proto,
709 sizeof (struct synth_operations));
711 name = "WaveFront external MIDI";
714 /* no synth operations for an external MIDI interface */
717 memcpy ((char *) &wf_mpu_synth_info[dev->devno],
718 (char *) &wf_mpu_synth_info_proto,
719 sizeof (struct synth_info));
721 strcpy (wf_mpu_synth_info[index].name, name);
723 wf_mpu_synth_operations[index].midi_dev = dev->devno;
724 wf_mpu_synth_operations[index].info = &wf_mpu_synth_info[index];
726 memcpy ((char *) &wf_mpu_midi_operations[index],
727 (char *) &wf_mpu_midi_proto,
728 sizeof (struct midi_operations));
731 wf_mpu_midi_operations[index].converter = NULL;
733 wf_mpu_midi_operations[index].converter =
734 &wf_mpu_synth_operations[index];
737 strcpy (wf_mpu_midi_operations[index].info.name, name);
739 midi_devs[dev->devno] = &wf_mpu_midi_operations[index];
740 midi_devs[dev->devno]->in_info.m_busy = 0;
741 midi_devs[dev->devno]->in_info.m_state = MST_INIT;
742 midi_devs[dev->devno]->in_info.m_ptr = 0;
743 midi_devs[dev->devno]->in_info.m_left = 0;
744 midi_devs[dev->devno]->in_info.m_prev_status = 0;
746 devs[index].opened = 0;
747 devs[index].mode = 0;
752 int virtual_midi_enable (void)
755 if ((virt_dev->devno < 0) &&
756 (virt_dev->devno = sound_alloc_mididev()) == -1) {
758 "WF-MPU: too many midi devices detected\n");
762 config_wf_mpu (virt_dev);
764 phys_dev->isvirtual = 1;
765 return virt_dev->devno;
769 virtual_midi_disable (void)
774 spin_lock_irqsave(&lock,flags);
776 wf_mpu_close (virt_dev->devno);
777 /* no synth on virt_dev, so no need to call wf_mpu_synth_close() */
778 phys_dev->isvirtual = 0;
780 spin_unlock_irqrestore(&lock,flags);
785 int __init detect_wf_mpu (int irq, int io_base)
787 if (!request_region(io_base, 2, "wavefront midi")) {
788 printk (KERN_WARNING "WF-MPU: I/O port %x already in use.\n",
793 phys_dev->base = io_base;
795 phys_dev->devno = -1;
796 virt_dev->devno = -1;
801 int __init install_wf_mpu (void)
803 if ((phys_dev->devno = sound_alloc_mididev()) < 0){
805 printk (KERN_ERR "WF-MPU: Too many MIDI devices detected.\n");
806 release_region(phys_dev->base, 2);
810 phys_dev->isvirtual = 0;
812 if (config_wf_mpu (phys_dev)) {
815 "WF-MPU: configuration for MIDI device %d failed\n",
817 sound_unload_mididev (phys_dev->devno);
821 /* OK, now we're configured to handle an interrupt ... */
823 if (request_irq (phys_dev->irq, wf_mpuintr, IRQF_DISABLED|IRQF_SHARED,
824 "wavefront midi", phys_dev) < 0) {
826 printk (KERN_ERR "WF-MPU: Failed to allocate IRQ%d\n",
832 /* This being a WaveFront (ICS-2115) emulated MPU-401, we have
833 to switch it into UART (dumb) mode, because otherwise, it
834 won't do anything at all.
839 return phys_dev->devno;
843 uninstall_wf_mpu (void)
846 release_region (phys_dev->base, 2);
847 free_irq (phys_dev->irq, phys_dev);
848 sound_unload_mididev (phys_dev->devno);
850 if (virt_dev->devno >= 0) {
851 sound_unload_mididev (virt_dev->devno);
856 start_uart_mode (void)
862 spin_lock_irqsave(&lock,flags);
866 for (i = 0; i < 30000 && !output_ready (); i++);
868 outb (UART_MODE_ON, COMDPORT(phys_dev));
870 for (ok = 0, i = 50000; i > 0 && !ok; i--) {
871 if (input_avail ()) {
872 if (read_data () == MPU_ACK) {
878 spin_unlock_irqrestore(&lock,flags);