Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/sound/oss/wf_midi.c b/sound/oss/wf_midi.c
new file mode 100644
index 0000000..7b167b7
--- /dev/null
+++ b/sound/oss/wf_midi.c
@@ -0,0 +1,880 @@
+/*
+ * sound/wf_midi.c
+ *
+ * The low level driver for the WaveFront ICS2115 MIDI interface(s)
+ * Note that there is also an MPU-401 emulation (actually, a UART-401
+ * emulation) on the CS4232 on the Tropez Plus. This code has nothing
+ * to do with that interface at all.
+ *
+ * The interface is essentially just a UART-401, but is has the
+ * interesting property of supporting what Turtle Beach called
+ * "Virtual MIDI" mode. In this mode, there are effectively *two*
+ * MIDI buses accessible via the interface, one that is routed
+ * solely to/from the external WaveFront synthesizer and the other
+ * corresponding to the pin/socket connector used to link external
+ * MIDI devices to the board.
+ *
+ * This driver fully supports this mode, allowing two distinct
+ * midi devices (/dev/midiNN and /dev/midiNN+1) to be used
+ * completely independently, giving 32 channels of MIDI routing,
+ * 16 to the WaveFront synth and 16 to the external MIDI bus.
+ *
+ * Switching between the two is accomplished externally by the driver
+ * using the two otherwise unused MIDI bytes. See the code for more details.
+ *
+ * NOTE: VIRTUAL MIDI MODE IS ON BY DEFAULT (see wavefront.c)
+ *
+ * The main reason to turn off Virtual MIDI mode is when you want to
+ * tightly couple the WaveFront synth with an external MIDI
+ * device. You won't be able to distinguish the source of any MIDI
+ * data except via SysEx ID, but thats probably OK, since for the most
+ * part, the WaveFront won't be sending any MIDI data at all.
+ *
+ * The main reason to turn on Virtual MIDI Mode is to provide two
+ * completely independent 16-channel MIDI buses, one to the
+ * WaveFront and one to any external MIDI devices. Given the 32
+ * voice nature of the WaveFront, its pretty easy to find a use
+ * for all 16 channels driving just that synth.
+ *
+ */
+
+/*
+ * Copyright (C) by Paul Barton-Davis 1998
+ * Some portions of this file are derived from work that is:
+ *
+ * CopyriGht (C) by Hannu Savolainen 1993-1996
+ *
+ * USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
+ * Version 2 (June 1991). See the "COPYING" file distributed with this software
+ * for more info.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include "sound_config.h"
+
+#include <linux/wavefront.h>
+
+#ifdef MODULE
+
+struct wf_mpu_config {
+ int base;
+#define DATAPORT(d) (d)->base
+#define COMDPORT(d) (d)->base+1
+#define STATPORT(d) (d)->base+1
+
+ int irq;
+ int opened;
+ int devno;
+ int synthno;
+ int mode;
+#define MODE_MIDI 1
+#define MODE_SYNTH 2
+
+ void (*inputintr) (int dev, unsigned char data);
+ char isvirtual; /* do virtual I/O stuff */
+};
+
+static struct wf_mpu_config devs[2];
+static struct wf_mpu_config *phys_dev = &devs[0];
+static struct wf_mpu_config *virt_dev = &devs[1];
+
+static void start_uart_mode (void);
+static DEFINE_SPINLOCK(lock);
+
+#define OUTPUT_READY 0x40
+#define INPUT_AVAIL 0x80
+#define MPU_ACK 0xFE
+#define UART_MODE_ON 0x3F
+
+static inline int wf_mpu_status (void)
+{
+ return inb (STATPORT (phys_dev));
+}
+
+static inline int input_avail (void)
+{
+ return !(wf_mpu_status() & INPUT_AVAIL);
+}
+
+static inline int output_ready (void)
+{
+ return !(wf_mpu_status() & OUTPUT_READY);
+}
+
+static inline int read_data (void)
+{
+ return inb (DATAPORT (phys_dev));
+}
+
+static inline void write_data (unsigned char byte)
+{
+ outb (byte, DATAPORT (phys_dev));
+}
+
+/*
+ * States for the input scanner (should be in dev_table.h)
+ */
+
+#define MST_SYSMSG 100 /* System message (sysx etc). */
+#define MST_MTC 102 /* Midi Time Code (MTC) qframe msg */
+#define MST_SONGSEL 103 /* Song select */
+#define MST_SONGPOS 104 /* Song position pointer */
+#define MST_TIMED 105 /* Leading timing byte rcvd */
+
+/* buffer space check for input scanner */
+
+#define BUFTEST(mi) if (mi->m_ptr >= MI_MAX || mi->m_ptr < 0) \
+{printk(KERN_ERR "WF-MPU: Invalid buffer pointer %d/%d, s=%d\n", \
+ mi->m_ptr, mi->m_left, mi->m_state);mi->m_ptr--;}
+
+static unsigned char len_tab[] = /* # of data bytes following a status
+ */
+{
+ 2, /* 8x */
+ 2, /* 9x */
+ 2, /* Ax */
+ 2, /* Bx */
+ 1, /* Cx */
+ 1, /* Dx */
+ 2, /* Ex */
+ 0 /* Fx */
+};
+
+static int
+wf_mpu_input_scanner (int devno, int synthdev, unsigned char midic)
+
+{
+ struct midi_input_info *mi = &midi_devs[devno]->in_info;
+
+ switch (mi->m_state) {
+ case MST_INIT:
+ switch (midic) {
+ case 0xf8:
+ /* Timer overflow */
+ break;
+
+ case 0xfc:
+ break;
+
+ case 0xfd:
+ /* XXX do something useful with this. If there is
+ an external MIDI timer (e.g. a hardware sequencer,
+ a useful timer can be derived ...
+
+ For now, no timer support.
+ */
+ break;
+
+ case 0xfe:
+ return MPU_ACK;
+ break;
+
+ case 0xf0:
+ case 0xf1:
+ case 0xf2:
+ case 0xf3:
+ case 0xf4:
+ case 0xf5:
+ case 0xf6:
+ case 0xf7:
+ break;
+
+ case 0xf9:
+ break;
+
+ case 0xff:
+ mi->m_state = MST_SYSMSG;
+ break;
+
+ default:
+ if (midic <= 0xef) {
+ mi->m_state = MST_TIMED;
+ }
+ else
+ printk (KERN_ERR "<MPU: Unknown event %02x> ",
+ midic);
+ }
+ break;
+
+ case MST_TIMED:
+ {
+ int msg = ((int) (midic & 0xf0) >> 4);
+
+ mi->m_state = MST_DATA;
+
+ if (msg < 8) { /* Data byte */
+
+ msg = ((int) (mi->m_prev_status & 0xf0) >> 4);
+ msg -= 8;
+ mi->m_left = len_tab[msg] - 1;
+
+ mi->m_ptr = 2;
+ mi->m_buf[0] = mi->m_prev_status;
+ mi->m_buf[1] = midic;
+
+ if (mi->m_left <= 0) {
+ mi->m_state = MST_INIT;
+ do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
+ mi->m_ptr = 0;
+ }
+ } else if (msg == 0xf) { /* MPU MARK */
+
+ mi->m_state = MST_INIT;
+
+ switch (midic) {
+ case 0xf8:
+ break;
+
+ case 0xf9:
+ break;
+
+ case 0xfc:
+ break;
+
+ default:
+ break;
+ }
+ } else {
+ mi->m_prev_status = midic;
+ msg -= 8;
+ mi->m_left = len_tab[msg];
+
+ mi->m_ptr = 1;
+ mi->m_buf[0] = midic;
+
+ if (mi->m_left <= 0) {
+ mi->m_state = MST_INIT;
+ do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
+ mi->m_ptr = 0;
+ }
+ }
+ }
+ break;
+
+ case MST_SYSMSG:
+ switch (midic) {
+ case 0xf0:
+ mi->m_state = MST_SYSEX;
+ break;
+
+ case 0xf1:
+ mi->m_state = MST_MTC;
+ break;
+
+ case 0xf2:
+ mi->m_state = MST_SONGPOS;
+ mi->m_ptr = 0;
+ break;
+
+ case 0xf3:
+ mi->m_state = MST_SONGSEL;
+ break;
+
+ case 0xf6:
+ mi->m_state = MST_INIT;
+
+ /*
+ * Real time messages
+ */
+ case 0xf8:
+ /* midi clock */
+ mi->m_state = MST_INIT;
+ /* XXX need ext MIDI timer support */
+ break;
+
+ case 0xfA:
+ mi->m_state = MST_INIT;
+ /* XXX need ext MIDI timer support */
+ break;
+
+ case 0xFB:
+ mi->m_state = MST_INIT;
+ /* XXX need ext MIDI timer support */
+ break;
+
+ case 0xFC:
+ mi->m_state = MST_INIT;
+ /* XXX need ext MIDI timer support */
+ break;
+
+ case 0xFE:
+ /* active sensing */
+ mi->m_state = MST_INIT;
+ break;
+
+ case 0xff:
+ mi->m_state = MST_INIT;
+ break;
+
+ default:
+ printk (KERN_ERR "unknown MIDI sysmsg %0x\n", midic);
+ mi->m_state = MST_INIT;
+ }
+ break;
+
+ case MST_MTC:
+ mi->m_state = MST_INIT;
+ break;
+
+ case MST_SYSEX:
+ if (midic == 0xf7) {
+ mi->m_state = MST_INIT;
+ } else {
+ /* XXX fix me */
+ }
+ break;
+
+ case MST_SONGPOS:
+ BUFTEST (mi);
+ mi->m_buf[mi->m_ptr++] = midic;
+ if (mi->m_ptr == 2) {
+ mi->m_state = MST_INIT;
+ mi->m_ptr = 0;
+ /* XXX need ext MIDI timer support */
+ }
+ break;
+
+ case MST_DATA:
+ BUFTEST (mi);
+ mi->m_buf[mi->m_ptr++] = midic;
+ if ((--mi->m_left) <= 0) {
+ mi->m_state = MST_INIT;
+ do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
+ mi->m_ptr = 0;
+ }
+ break;
+
+ default:
+ printk (KERN_ERR "Bad state %d ", mi->m_state);
+ mi->m_state = MST_INIT;
+ }
+
+ return 1;
+}
+
+static irqreturn_t
+wf_mpuintr(int irq, void *dev_id, struct pt_regs *dummy)
+
+{
+ struct wf_mpu_config *physical_dev = dev_id;
+ static struct wf_mpu_config *input_dev;
+ struct midi_input_info *mi = &midi_devs[physical_dev->devno]->in_info;
+ int n;
+
+ if (!input_avail()) { /* not for us */
+ return IRQ_NONE;
+ }
+
+ if (mi->m_busy)
+ return IRQ_HANDLED;
+ spin_lock(&lock);
+ mi->m_busy = 1;
+
+ if (!input_dev) {
+ input_dev = physical_dev;
+ }
+
+ n = 50; /* XXX why ? */
+
+ do {
+ unsigned char c = read_data ();
+
+ if (phys_dev->isvirtual) {
+
+ if (c == WF_EXTERNAL_SWITCH) {
+ input_dev = virt_dev;
+ continue;
+ } else if (c == WF_INTERNAL_SWITCH) {
+ input_dev = phys_dev;
+ continue;
+ } /* else just leave it as it is */
+
+ } else {
+ input_dev = phys_dev;
+ }
+
+ if (input_dev->mode == MODE_SYNTH) {
+
+ wf_mpu_input_scanner (input_dev->devno,
+ input_dev->synthno, c);
+
+ } else if (input_dev->opened & OPEN_READ) {
+
+ if (input_dev->inputintr) {
+ input_dev->inputintr (input_dev->devno, c);
+ }
+ }
+
+ } while (input_avail() && n-- > 0);
+
+ mi->m_busy = 0;
+ spin_unlock(&lock);
+ return IRQ_HANDLED;
+}
+
+static int
+wf_mpu_open (int dev, int mode,
+ void (*input) (int dev, unsigned char data),
+ void (*output) (int dev)
+ )
+{
+ struct wf_mpu_config *devc;
+
+ if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
+ return -(ENXIO);
+
+ if (phys_dev->devno == dev) {
+ devc = phys_dev;
+ } else if (phys_dev->isvirtual && virt_dev->devno == dev) {
+ devc = virt_dev;
+ } else {
+ printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
+ return -(EINVAL);
+ }
+
+ if (devc->opened) {
+ return -(EBUSY);
+ }
+
+ devc->mode = MODE_MIDI;
+ devc->opened = mode;
+ devc->synthno = 0;
+
+ devc->inputintr = input;
+ return 0;
+}
+
+static void
+wf_mpu_close (int dev)
+{
+ struct wf_mpu_config *devc;
+
+ if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
+ return;
+
+ if (phys_dev->devno == dev) {
+ devc = phys_dev;
+ } else if (phys_dev->isvirtual && virt_dev->devno == dev) {
+ devc = virt_dev;
+ } else {
+ printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
+ return;
+ }
+
+ devc->mode = 0;
+ devc->inputintr = NULL;
+ devc->opened = 0;
+}
+
+static int
+wf_mpu_out (int dev, unsigned char midi_byte)
+{
+ int timeout;
+ unsigned long flags;
+ static int lastoutdev = -1;
+ unsigned char switchch;
+
+ if (phys_dev->isvirtual && lastoutdev != dev) {
+
+ if (dev == phys_dev->devno) {
+ switchch = WF_INTERNAL_SWITCH;
+ } else if (dev == virt_dev->devno) {
+ switchch = WF_EXTERNAL_SWITCH;
+ } else {
+ printk (KERN_ERR "WF-MPU: bad device number %d", dev);
+ return (0);
+ }
+
+ /* XXX fix me */
+
+ for (timeout = 30000; timeout > 0 && !output_ready ();
+ timeout--);
+
+ spin_lock_irqsave(&lock,flags);
+
+ if (!output_ready ()) {
+ printk (KERN_WARNING "WF-MPU: Send switch "
+ "byte timeout\n");
+ spin_unlock_irqrestore(&lock,flags);
+ return 0;
+ }
+
+ write_data (switchch);
+ spin_unlock_irqrestore(&lock,flags);
+ }
+
+ lastoutdev = dev;
+
+ /*
+ * Sometimes it takes about 30000 loops before the output becomes ready
+ * (After reset). Normally it takes just about 10 loops.
+ */
+
+ /* XXX fix me */
+
+ for (timeout = 30000; timeout > 0 && !output_ready (); timeout--);
+
+ spin_lock_irqsave(&lock,flags);
+ if (!output_ready ()) {
+ spin_unlock_irqrestore(&lock,flags);
+ printk (KERN_WARNING "WF-MPU: Send data timeout\n");
+ return 0;
+ }
+
+ write_data (midi_byte);
+ spin_unlock_irqrestore(&lock,flags);
+
+ return 1;
+}
+
+static inline int wf_mpu_start_read (int dev) {
+ return 0;
+}
+
+static inline int wf_mpu_end_read (int dev) {
+ return 0;
+}
+
+static int wf_mpu_ioctl (int dev, unsigned cmd, void __user *arg)
+{
+ printk (KERN_WARNING
+ "WF-MPU: Intelligent mode not supported by hardware.\n");
+ return -(EINVAL);
+}
+
+static int wf_mpu_buffer_status (int dev)
+{
+ return 0;
+}
+
+static struct synth_operations wf_mpu_synth_operations[2];
+static struct midi_operations wf_mpu_midi_operations[2];
+
+static struct midi_operations wf_mpu_midi_proto =
+{
+ .owner = THIS_MODULE,
+ .info = {"WF-MPU MIDI", 0, MIDI_CAP_MPU401, SNDCARD_MPU401},
+ .in_info = {0}, /* in_info */
+ .open = wf_mpu_open,
+ .close = wf_mpu_close,
+ .ioctl = wf_mpu_ioctl,
+ .outputc = wf_mpu_out,
+ .start_read = wf_mpu_start_read,
+ .end_read = wf_mpu_end_read,
+ .buffer_status = wf_mpu_buffer_status,
+};
+
+static struct synth_info wf_mpu_synth_info_proto =
+{"WaveFront MPU-401 interface", 0,
+ SYNTH_TYPE_MIDI, MIDI_TYPE_MPU401, 0, 128, 0, 128, SYNTH_CAP_INPUT};
+
+static struct synth_info wf_mpu_synth_info[2];
+
+static int
+wf_mpu_synth_ioctl (int dev, unsigned int cmd, void __user *arg)
+{
+ int midi_dev;
+ int index;
+
+ midi_dev = synth_devs[dev]->midi_dev;
+
+ if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev]==NULL)
+ return -(ENXIO);
+
+ if (midi_dev == phys_dev->devno) {
+ index = 0;
+ } else if (phys_dev->isvirtual && midi_dev == virt_dev->devno) {
+ index = 1;
+ } else {
+ return -(EINVAL);
+ }
+
+ switch (cmd) {
+
+ case SNDCTL_SYNTH_INFO:
+ if (copy_to_user(arg,
+ &wf_mpu_synth_info[index],
+ sizeof (struct synth_info)))
+ return -EFAULT;
+ return 0;
+
+ case SNDCTL_SYNTH_MEMAVL:
+ return 0x7fffffff;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int
+wf_mpu_synth_open (int dev, int mode)
+{
+ int midi_dev;
+ struct wf_mpu_config *devc;
+
+ midi_dev = synth_devs[dev]->midi_dev;
+
+ if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev]==NULL) {
+ return -(ENXIO);
+ }
+
+ if (phys_dev->devno == midi_dev) {
+ devc = phys_dev;
+ } else if (phys_dev->isvirtual && virt_dev->devno == midi_dev) {
+ devc = virt_dev;
+ } else {
+ printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
+ return -(EINVAL);
+ }
+
+ if (devc->opened) {
+ return -(EBUSY);
+ }
+
+ devc->mode = MODE_SYNTH;
+ devc->synthno = dev;
+ devc->opened = mode;
+ devc->inputintr = NULL;
+ return 0;
+}
+
+static void
+wf_mpu_synth_close (int dev)
+{
+ int midi_dev;
+ struct wf_mpu_config *devc;
+
+ midi_dev = synth_devs[dev]->midi_dev;
+
+ if (phys_dev->devno == midi_dev) {
+ devc = phys_dev;
+ } else if (phys_dev->isvirtual && virt_dev->devno == midi_dev) {
+ devc = virt_dev;
+ } else {
+ printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
+ return;
+ }
+
+ devc->inputintr = NULL;
+ devc->opened = 0;
+ devc->mode = 0;
+}
+
+#define _MIDI_SYNTH_C_
+#define MIDI_SYNTH_NAME "WaveFront (MIDI)"
+#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
+#include "midi_synth.h"
+
+static struct synth_operations wf_mpu_synth_proto =
+{
+ .owner = THIS_MODULE,
+ .id = "WaveFront (ICS2115)",
+ .info = NULL, /* info field, filled in during configuration */
+ .midi_dev = 0, /* MIDI dev XXX should this be -1 ? */
+ .synth_type = SYNTH_TYPE_MIDI,
+ .synth_subtype = SAMPLE_TYPE_WAVEFRONT,
+ .open = wf_mpu_synth_open,
+ .close = wf_mpu_synth_close,
+ .ioctl = wf_mpu_synth_ioctl,
+ .kill_note = midi_synth_kill_note,
+ .start_note = midi_synth_start_note,
+ .set_instr = midi_synth_set_instr,
+ .reset = midi_synth_reset,
+ .hw_control = midi_synth_hw_control,
+ .load_patch = midi_synth_load_patch,
+ .aftertouch = midi_synth_aftertouch,
+ .controller = midi_synth_controller,
+ .panning = midi_synth_panning,
+ .bender = midi_synth_bender,
+ .setup_voice = midi_synth_setup_voice,
+ .send_sysex = midi_synth_send_sysex
+};
+
+static int
+config_wf_mpu (struct wf_mpu_config *dev)
+
+{
+ int is_external;
+ char *name;
+ int index;
+
+ if (dev == phys_dev) {
+ name = "WaveFront internal MIDI";
+ is_external = 0;
+ index = 0;
+ memcpy ((char *) &wf_mpu_synth_operations[index],
+ (char *) &wf_mpu_synth_proto,
+ sizeof (struct synth_operations));
+ } else {
+ name = "WaveFront external MIDI";
+ is_external = 1;
+ index = 1;
+ /* no synth operations for an external MIDI interface */
+ }
+
+ memcpy ((char *) &wf_mpu_synth_info[dev->devno],
+ (char *) &wf_mpu_synth_info_proto,
+ sizeof (struct synth_info));
+
+ strcpy (wf_mpu_synth_info[index].name, name);
+
+ wf_mpu_synth_operations[index].midi_dev = dev->devno;
+ wf_mpu_synth_operations[index].info = &wf_mpu_synth_info[index];
+
+ memcpy ((char *) &wf_mpu_midi_operations[index],
+ (char *) &wf_mpu_midi_proto,
+ sizeof (struct midi_operations));
+
+ if (is_external) {
+ wf_mpu_midi_operations[index].converter = NULL;
+ } else {
+ wf_mpu_midi_operations[index].converter =
+ &wf_mpu_synth_operations[index];
+ }
+
+ strcpy (wf_mpu_midi_operations[index].info.name, name);
+
+ midi_devs[dev->devno] = &wf_mpu_midi_operations[index];
+ midi_devs[dev->devno]->in_info.m_busy = 0;
+ midi_devs[dev->devno]->in_info.m_state = MST_INIT;
+ midi_devs[dev->devno]->in_info.m_ptr = 0;
+ midi_devs[dev->devno]->in_info.m_left = 0;
+ midi_devs[dev->devno]->in_info.m_prev_status = 0;
+
+ devs[index].opened = 0;
+ devs[index].mode = 0;
+
+ return (0);
+}
+
+int virtual_midi_enable (void)
+
+{
+ if ((virt_dev->devno < 0) &&
+ (virt_dev->devno = sound_alloc_mididev()) == -1) {
+ printk (KERN_ERR
+ "WF-MPU: too many midi devices detected\n");
+ return -1;
+ }
+
+ config_wf_mpu (virt_dev);
+
+ phys_dev->isvirtual = 1;
+ return virt_dev->devno;
+}
+
+int
+virtual_midi_disable (void)
+
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&lock,flags);
+
+ wf_mpu_close (virt_dev->devno);
+ /* no synth on virt_dev, so no need to call wf_mpu_synth_close() */
+ phys_dev->isvirtual = 0;
+
+ spin_unlock_irqrestore(&lock,flags);
+
+ return 0;
+}
+
+int __init detect_wf_mpu (int irq, int io_base)
+{
+ if (!request_region(io_base, 2, "wavefront midi")) {
+ printk (KERN_WARNING "WF-MPU: I/O port %x already in use.\n",
+ io_base);
+ return -1;
+ }
+
+ phys_dev->base = io_base;
+ phys_dev->irq = irq;
+ phys_dev->devno = -1;
+ virt_dev->devno = -1;
+
+ return 0;
+}
+
+int __init install_wf_mpu (void)
+{
+ if ((phys_dev->devno = sound_alloc_mididev()) < 0){
+
+ printk (KERN_ERR "WF-MPU: Too many MIDI devices detected.\n");
+ release_region(phys_dev->base, 2);
+ return -1;
+ }
+
+ phys_dev->isvirtual = 0;
+
+ if (config_wf_mpu (phys_dev)) {
+
+ printk (KERN_WARNING
+ "WF-MPU: configuration for MIDI device %d failed\n",
+ phys_dev->devno);
+ sound_unload_mididev (phys_dev->devno);
+
+ }
+
+ /* OK, now we're configured to handle an interrupt ... */
+
+ if (request_irq (phys_dev->irq, wf_mpuintr, SA_INTERRUPT|SA_SHIRQ,
+ "wavefront midi", phys_dev) < 0) {
+
+ printk (KERN_ERR "WF-MPU: Failed to allocate IRQ%d\n",
+ phys_dev->irq);
+ return -1;
+
+ }
+
+ /* This being a WaveFront (ICS-2115) emulated MPU-401, we have
+ to switch it into UART (dumb) mode, because otherwise, it
+ won't do anything at all.
+ */
+
+ start_uart_mode ();
+
+ return phys_dev->devno;
+}
+
+void
+uninstall_wf_mpu (void)
+
+{
+ release_region (phys_dev->base, 2);
+ free_irq (phys_dev->irq, phys_dev);
+ sound_unload_mididev (phys_dev->devno);
+
+ if (virt_dev->devno >= 0) {
+ sound_unload_mididev (virt_dev->devno);
+ }
+}
+
+static void
+start_uart_mode (void)
+
+{
+ int ok, i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&lock,flags);
+
+ /* XXX fix me */
+
+ for (i = 0; i < 30000 && !output_ready (); i++);
+
+ outb (UART_MODE_ON, COMDPORT(phys_dev));
+
+ for (ok = 0, i = 50000; i > 0 && !ok; i--) {
+ if (input_avail ()) {
+ if (read_data () == MPU_ACK) {
+ ok = 1;
+ }
+ }
+ }
+
+ spin_unlock_irqrestore(&lock,flags);
+}
+#endif