Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 256 insertions, 0 deletions

diff --git a/sound/oss/gus_midi.c b/sound/oss/gus_midi.c
new file mode 100644
index 000000000000..b48f57c24e48
--- /dev/null
+++ b/sound/oss/gus_midi.c
@@ -0,0 +1,256 @@
+/*
+ * sound/gus2_midi.c
+ *
+ * The low level driver for the GUS Midi Interface.
+ *
+ *
+ * Copyright (C) by Hannu Savolainen 1993-1997
+ *
+ * OSS/Free 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.
+ *
+ * Changes:
+ * 11-10-2000   Bartlomiej Zolnierkiewicz <bkz@linux-ide.org>
+ *              Added __init to gus_midi_init()
+ */
+
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include "sound_config.h"
+
+#include "gus.h"
+#include "gus_hw.h"
+
+static int      midi_busy, input_opened;
+static int      my_dev;
+static int      output_used;
+static volatile unsigned char gus_midi_control;
+static void     (*midi_input_intr) (int dev, unsigned char data);
+
+static unsigned char tmp_queue[256];
+extern int      gus_pnp_flag;
+static volatile int qlen;
+static volatile unsigned char qhead, qtail;
+extern int      gus_base, gus_irq, gus_dma;
+extern int     *gus_osp;
+extern spinlock_t gus_lock;
+
+static int GUS_MIDI_STATUS(void)
+{
+        return inb(u_MidiStatus);
+}
+
+static int gus_midi_open(int dev, int mode, void (*input) (int dev, unsigned char data), void (*output) (int dev))
+{
+        if (midi_busy)
+        {
+/*              printk("GUS: Midi busy\n");*/
+                return -EBUSY;
+        }
+        outb((MIDI_RESET), u_MidiControl);
+        gus_delay();
+
+        gus_midi_control = 0;
+        input_opened = 0;
+
+        if (mode == OPEN_READ || mode == OPEN_READWRITE)
+                if (!gus_pnp_flag)
+                {
+                        gus_midi_control |= MIDI_ENABLE_RCV;
+                        input_opened = 1;
+                }
+        outb((gus_midi_control), u_MidiControl);        /* Enable */
+
+        midi_busy = 1;
+        qlen = qhead = qtail = output_used = 0;
+        midi_input_intr = input;
+
+        return 0;
+}
+
+static int dump_to_midi(unsigned char midi_byte)
+{
+        unsigned long   flags;
+        int             ok = 0;
+
+        output_used = 1;
+
+        spin_lock_irqsave(&gus_lock, flags);
+
+        if (GUS_MIDI_STATUS() & MIDI_XMIT_EMPTY)
+        {
+                ok = 1;
+                outb((midi_byte), u_MidiData);
+        }
+        else
+        {
+                /*
+                 * Enable Midi xmit interrupts (again)
+                 */
+                gus_midi_control |= MIDI_ENABLE_XMIT;
+                outb((gus_midi_control), u_MidiControl);
+        }
+
+        spin_unlock_irqrestore(&gus_lock,flags);
+        return ok;
+}
+
+static void gus_midi_close(int dev)
+{
+        /*
+         * Reset FIFO pointers, disable intrs
+         */
+
+        outb((MIDI_RESET), u_MidiControl);
+        midi_busy = 0;
+}
+
+static int gus_midi_out(int dev, unsigned char midi_byte)
+{
+        unsigned long   flags;
+
+        /*
+         * Drain the local queue first
+         */
+        spin_lock_irqsave(&gus_lock, flags);
+
+        while (qlen && dump_to_midi(tmp_queue[qhead]))
+        {
+                qlen--;
+                qhead++;
+        }
+        spin_unlock_irqrestore(&gus_lock,flags);
+
+        /*
+         *      Output the byte if the local queue is empty.
+         */
+
+        if (!qlen)
+                if (dump_to_midi(midi_byte))
+                        return 1;       /*
+                                         * OK
+                                         */
+
+        /*
+         *      Put to the local queue
+         */
+
+        if (qlen >= 256)
+                return 0;       /*
+                                 * Local queue full
+                                 */
+        spin_lock_irqsave(&gus_lock, flags);
+
+        tmp_queue[qtail] = midi_byte;
+        qlen++;
+        qtail++;
+
+        spin_unlock_irqrestore(&gus_lock,flags);
+        return 1;
+}
+
+static int gus_midi_start_read(int dev)
+{
+        return 0;
+}
+
+static int gus_midi_end_read(int dev)
+{
+        return 0;
+}
+
+static void gus_midi_kick(int dev)
+{
+}
+
+static int gus_midi_buffer_status(int dev)
+{
+        unsigned long   flags;
+
+        if (!output_used)
+                return 0;
+
+        spin_lock_irqsave(&gus_lock, flags);
+
+        if (qlen && dump_to_midi(tmp_queue[qhead]))
+        {
+                qlen--;
+                qhead++;
+        }
+        spin_unlock_irqrestore(&gus_lock,flags);
+        return (qlen > 0) || !(GUS_MIDI_STATUS() & MIDI_XMIT_EMPTY);
+}
+
+#define MIDI_SYNTH_NAME "Gravis Ultrasound Midi"
+#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
+#include "midi_synth.h"
+
+static struct midi_operations gus_midi_operations =
+{
+        .owner          = THIS_MODULE,
+        .info           = {"Gravis UltraSound Midi", 0, 0, SNDCARD_GUS},
+        .converter      = &std_midi_synth,
+        .in_info        = {0},
+        .open           = gus_midi_open,
+        .close          = gus_midi_close,
+        .outputc        = gus_midi_out,
+        .start_read     = gus_midi_start_read,
+        .end_read       = gus_midi_end_read,
+        .kick           = gus_midi_kick,
+        .buffer_status  = gus_midi_buffer_status,
+};
+
+void __init gus_midi_init(struct address_info *hw_config)
+{
+        int dev = sound_alloc_mididev();
+
+        if (dev == -1)
+        {
+                printk(KERN_INFO "gus_midi: Too many midi devices detected\n");
+                return;
+        }
+        outb((MIDI_RESET), u_MidiControl);
+
+        std_midi_synth.midi_dev = my_dev = dev;
+        hw_config->slots[2] = dev;
+        midi_devs[dev] = &gus_midi_operations;
+        sequencer_init();
+        return;
+}
+
+void gus_midi_interrupt(int dummy)
+{
+        volatile unsigned char stat, data;
+        int timeout = 10;
+
+        spin_lock(&gus_lock);
+
+        while (timeout-- > 0 && (stat = GUS_MIDI_STATUS()) & (MIDI_RCV_FULL | MIDI_XMIT_EMPTY))
+        {
+                if (stat & MIDI_RCV_FULL)
+                {
+                        data = inb(u_MidiData);
+                        if (input_opened)
+                                midi_input_intr(my_dev, data);
+                }
+                if (stat & MIDI_XMIT_EMPTY)
+                {
+                        while (qlen && dump_to_midi(tmp_queue[qhead]))
+                        {
+                                qlen--;
+                                qhead++;
+                        }
+                        if (!qlen)
+                        {
+                              /*
+                               * Disable Midi output interrupts, since no data in the buffer
+                               */
+                              gus_midi_control &= ~MIDI_ENABLE_XMIT;
+                              outb((gus_midi_control), u_MidiControl);
+                              outb((gus_midi_control), u_MidiControl);
+                        }
+                }
+        }
+        spin_unlock(&gus_lock);
+}