static int
sb_midi_out(int dev, u_char midi_byte)
{
u_long flags;
if (sb_midi_mode == NORMAL_MIDI) {
flags = splhigh();
if (sb_dsp_command(0x38))
sb_dsp_command(midi_byte);
else
printf("SB Error: Unable to send a MIDI byte\n");
splx(flags);
} else
sb_dsp_command(midi_byte); /* UART write */
return 1;
}
static int
sb_midi_out (int dev, unsigned char midi_byte)
{
unsigned long flags;
if (sb_midi_mode == NORMAL_MIDI)
{
DISABLE_INTR (flags);
if (sb_dsp_command (0x38))
sb_dsp_command (midi_byte);
else
printk ("SB Error: Unable to send a MIDI byte\n");
RESTORE_INTR (flags);
}
else
sb_dsp_command (midi_byte); /*
* UART write
*/
return 1;
}
static int sb_midi_out(int dev, unsigned char midi_byte)
{
sb_devc *devc = midi_devs[dev]->devc;
if (devc == NULL)
return 1;
if (devc->midi_broken)
return 1;
if (!sb_dsp_command(devc, midi_byte))
{
devc->midi_broken = 1;
return 1;
}
return 1;
}
static int
sb_midi_open(int dev, int mode, void (*input) (int dev, u_char data),
void (*output) (int dev))
{
int ret;
if (!sb_dsp_ok) {
printf("SB Error: MIDI hardware not installed\n");
return -(ENXIO);
}
if (sb_midi_busy)
return -(EBUSY);
if (mode != OPEN_WRITE && !sb_duplex_midi) {
if (num_midis == 1)
printf("SoundBlaster: Midi input not currently supported\n");
return -(EPERM);
}
sb_midi_mode = NORMAL_MIDI;
if (mode != OPEN_WRITE) {
if (sb_dsp_busy || sb_intr_active)
return -(EBUSY);
sb_midi_mode = UART_MIDI;
}
if (sb_dsp_highspeed) {
printf("SB Error: Midi output not possible during stereo or high speed audio\n");
return -(EBUSY);
}
if (sb_midi_mode == UART_MIDI) {
sb_irq_mode = IMODE_MIDI;
sb_reset_dsp();
if (!sb_dsp_command(0x35))
return -(EIO); /* Enter the UART mode */
sb_intr_active = 1;
input_opened = 1;
midi_input_intr = input;
}
sb_midi_busy = 1;
return 0;
}
static int sb_midi_open(int dev, int mode,
void (*input) (int dev, unsigned char data),
void (*output) (int dev)
)
{
sb_devc *devc = midi_devs[dev]->devc;
unsigned long flags;
if (devc == NULL)
return -ENXIO;
save_flags(flags);
cli();
if (devc->opened)
{
restore_flags(flags);
return -EBUSY;
}
devc->opened = 1;
restore_flags(flags);
devc->irq_mode = IMODE_MIDI;
devc->midi_broken = 0;
sb_dsp_reset(devc);
if (!sb_dsp_command(devc, 0x35)) /* Start MIDI UART mode */
{
devc->opened = 0;
return -EIO;
}
devc->intr_active = 1;
if (mode & OPEN_READ)
{
devc->input_opened = 1;
devc->midi_input_intr = input;
}
return 0;
}
