diff options
Diffstat (limited to 'sys/i386/isa/sound/gus_midi.c')
| -rw-r--r-- | sys/i386/isa/sound/gus_midi.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/sys/i386/isa/sound/gus_midi.c b/sys/i386/isa/sound/gus_midi.c deleted file mode 100644 index 0dfc7c5..0000000 --- a/sys/i386/isa/sound/gus_midi.c +++ /dev/null @@ -1,274 +0,0 @@ -/* - * sound/gus2_midi.c - * - * The low level driver for the GUS Midi Interface. - * - * Copyright by Hannu Savolainen 1993 - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. 2. - * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR - * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -#include <i386/isa/sound/sound_config.h> - -#if defined(CONFIG_GUS) && defined(CONFIG_MIDI) -#include <i386/isa/sound/gus_hw.h> - -static int midi_busy = 0, input_opened = 0; -static int my_dev; -static int output_used = 0; -static volatile unsigned char gus_midi_control; - -static void (*midi_input_intr) (int dev, unsigned char data); - -static unsigned char tmp_queue[256]; -static volatile int qlen; -static volatile unsigned char qhead, qtail; -extern int gus_base, gus_irq, gus_dma; -extern sound_os_info *gus_osp; - -#define GUS_MIDI_STATUS() 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) { - printf("GUS: Midi busy\n"); - return -(EBUSY); - } - outb(u_MidiControl, MIDI_RESET); - gus_delay(); - - gus_midi_control = 0; - input_opened = 0; - - if (mode == OPEN_READ || mode == OPEN_READWRITE) { - gus_midi_control |= MIDI_ENABLE_RCV; - input_opened = 1; - } - if (mode == OPEN_WRITE || mode == OPEN_READWRITE) { - gus_midi_control |= MIDI_ENABLE_XMIT; - } - outb(u_MidiControl, gus_midi_control); /* 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; - - flags = splhigh(); - - if (GUS_MIDI_STATUS() & MIDI_XMIT_EMPTY) { - ok = 1; - outb(u_MidiData, midi_byte); - } else { - /* - * Enable Midi xmit interrupts (again) - */ - gus_midi_control |= MIDI_ENABLE_XMIT; - outb(u_MidiControl, gus_midi_control); - } - - splx(flags); - return ok; -} - -static void -gus_midi_close(int dev) -{ - /* - * Reset FIFO pointers, disable intrs - */ - - outb(u_MidiControl, MIDI_RESET); - midi_busy = 0; -} - -static int -gus_midi_out(int dev, unsigned char midi_byte) -{ - - unsigned long flags; - - /* - * Drain the local queue first - */ - - flags = splhigh(); - - while (qlen && dump_to_midi(tmp_queue[qhead])) { - qlen--; - qhead++; - } - - splx(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 */ - - flags = splhigh(); - - tmp_queue[qtail] = midi_byte; - qlen++; - qtail++; - - splx(flags); - - return 1; -} - -static int -gus_midi_start_read(int dev) -{ - return 0; -} - -static int -gus_midi_end_read(int dev) -{ - return 0; -} - -static int -gus_midi_ioctl(int dev, unsigned cmd, ioctl_arg arg) -{ - return -(EINVAL); -} - -static void -gus_midi_kick(int dev) -{ -} - -static int -gus_midi_buffer_status(int dev) -{ - unsigned long flags; - - if (!output_used) - return 0; - - flags = splhigh(); - - if (qlen && dump_to_midi(tmp_queue[qhead])) { - qlen--; - qhead++; - } - splx(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 <i386/isa/sound/midi_synth.h> - -static struct midi_operations gus_midi_operations = -{ - {"Gravis UltraSound Midi", 0, 0, SNDCARD_GUS}, - &std_midi_synth, - {0}, - gus_midi_open, - gus_midi_close, - gus_midi_ioctl, - gus_midi_out, - gus_midi_start_read, - gus_midi_end_read, - gus_midi_kick, - NULL, /* command */ - gus_midi_buffer_status, - NULL -}; - -void -gus_midi_init() -{ - if (num_midis >= MAX_MIDI_DEV) { - printf("Sound: Too many midi devices detected\n"); - return; - } - outb(u_MidiControl, MIDI_RESET); - - std_midi_synth.midi_dev = my_dev = num_midis; - midi_devs[num_midis++] = &gus_midi_operations; - return; -} - -void -gus_midi_interrupt(int dummy) -{ - unsigned char stat, data; - unsigned long flags; - - flags = splhigh(); - - stat = GUS_MIDI_STATUS(); - - 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(u_MidiControl, gus_midi_control); - } - } - splx(flags); -} - -#endif |
