diff options
Diffstat (limited to 'sound/oss/gus_midi.c')
| -rw-r--r-- | sound/oss/gus_midi.c | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/sound/oss/gus_midi.c b/sound/oss/gus_midi.c deleted file mode 100644 index d1997a4..0000000 --- a/sound/oss/gus_midi.c +++ /dev/null @@ -1,256 +0,0 @@ -/* - * sound/oss/gus_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); -} |
