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Diffstat (limited to 'sys/i386/isa/sound/sound_timer.c')
-rw-r--r--sys/i386/isa/sound/sound_timer.c458
1 files changed, 198 insertions, 260 deletions
diff --git a/sys/i386/isa/sound/sound_timer.c b/sys/i386/isa/sound/sound_timer.c
index c6544c82a7ee..8450b2d73503 100644
--- a/sys/i386/isa/sound/sound_timer.c
+++ b/sys/i386/isa/sound/sound_timer.c
@@ -1,11 +1,8 @@
/*
* sound/sound_timer.c
- *
- * Timer for the level 2 interface of the /dev/sequencer. Uses the
- * 80 and 320 usec timers of OPL-3 (PAS16 only) and GUS.
- *
+ *
* 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
@@ -13,7 +10,7 @@
* 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
@@ -25,381 +22,322 @@
* 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.
- *
+ *
*/
#define SEQUENCER_C
-#include "sound_config.h"
+#include <i386/isa/sound/sound_config.h>
-#ifdef CONFIGURE_SOUNDCARD
+#if NSND > 0
-#if !defined(EXCLUDE_SEQUENCER) && (!defined(EXCLUDE_GUS) || (!defined(EXCLUDE_PAS) && !defined(EXCLUDE_YM3812)))
+#if defined(CONFIG_SEQUENCER)
static volatile int initialized = 0, opened = 0, tmr_running = 0;
static volatile time_t tmr_offs, tmr_ctr;
-static volatile unsigned long ticks_offs;
+static volatile u_long ticks_offs;
static volatile int curr_tempo, curr_timebase;
-static volatile unsigned long curr_ticks;
-static volatile unsigned long next_event_time;
-static unsigned long prev_event_time;
-static volatile int select_addr, data_addr;
-static volatile int curr_timer = 0;
-static volatile unsigned long usecs_per_tmr; /* Length of the current interval */
+static volatile u_long curr_ticks;
+static volatile u_long next_event_time;
+static u_long prev_event_time;
+static volatile u_long usecs_per_tmr; /* Length of the current interval */
+static struct sound_lowlev_timer *tmr = NULL;
-static void
-timer_command (unsigned int addr, unsigned int val)
+static u_long
+tmr2ticks(int tmr_value)
{
- int i;
+ /*
+ * Convert timer ticks to MIDI ticks
+ */
- OUTB ((unsigned char) (addr & 0xff), select_addr);
+ u_long tmp;
+ u_long scale;
- for (i = 0; i < 2; i++)
- INB (select_addr);
+ tmp = tmr_value * usecs_per_tmr; /* Convert to usecs */
- OUTB ((unsigned char) (val & 0xff), data_addr);
+ scale = (60 * 1000000) / (curr_tempo * curr_timebase); /* usecs per MIDI tick */
- for (i = 0; i < 2; i++)
- INB (select_addr);
+ return (tmp + (scale / 2)) / scale;
}
static void
-arm_timer (int timer, unsigned int interval)
-{
-
- curr_timer = timer;
-
- if (timer == 1)
- {
- gus_write8 (0x46, 256 - interval); /* Set counter for timer 1 */
- gus_write8 (0x45, 0x04); /* Enable timer 1 IRQ */
- timer_command (0x04, 0x01); /* Start timer 1 */
- }
- else
- {
- gus_write8 (0x47, 256 - interval); /* Set counter for timer 2 */
- gus_write8 (0x45, 0x08); /* Enable timer 2 IRQ */
- timer_command (0x04, 0x02); /* Start timer 2 */
- }
-}
-
-static unsigned long
-tmr2ticks (int tmr_value)
+reprogram_timer(void)
{
- /*
- * Convert timer ticks to MIDI ticks
- */
-
- unsigned long tmp;
- unsigned long scale;
+ u_long usecs_per_tick;
- tmp = tmr_value * usecs_per_tmr; /* Convert to usecs */
+ usecs_per_tick = (60 * 1000000) / (curr_tempo * curr_timebase);
- scale = (60 * 1000000) / (curr_tempo * curr_timebase); /* usecs per MIDI tick */
+ /*
+ * Don't kill the system by setting too high timer rate
+ */
+ if (usecs_per_tick < 2000)
+ usecs_per_tick = 2000;
- return (tmp + (scale / 2)) / scale;
+ usecs_per_tmr = tmr->tmr_start(tmr->dev, usecs_per_tick);
}
-static void
-reprogram_timer (void)
+void
+sound_timer_syncinterval(u_int new_usecs)
{
- unsigned long usecs_per_tick;
- int timer_no, resolution;
- int divisor;
-
- usecs_per_tick = (60 * 1000000) / (curr_tempo * curr_timebase);
-
- /*
- * Don't kill the system by setting too high timer rate
- */
- if (usecs_per_tick < 2000)
- usecs_per_tick = 2000;
-
- if (usecs_per_tick > (256 * 80))
- {
- timer_no = 2;
- resolution = 320; /* usec */
- }
- else
- {
- timer_no = 1;
- resolution = 80; /* usec */
- }
-
- divisor = (usecs_per_tick + (resolution / 2)) / resolution;
- usecs_per_tmr = divisor * resolution;
-
- arm_timer (timer_no, divisor);
+ /*
+ * This routine is called by the hardware level if the clock
+ * frequency has changed for some reason.
+ */
+ tmr_offs = tmr_ctr;
+ ticks_offs += tmr2ticks(tmr_ctr);
+ tmr_ctr = 0;
+
+ usecs_per_tmr = new_usecs;
}
static void
-tmr_reset (void)
+tmr_reset(void)
{
- unsigned long flags;
-
- DISABLE_INTR (flags);
- tmr_offs = 0;
- ticks_offs = 0;
- tmr_ctr = 0;
- next_event_time = 0xffffffff;
- prev_event_time = 0;
- curr_ticks = 0;
- RESTORE_INTR (flags);
+ u_long flags;
+
+ flags = splhigh();
+ tmr_offs = 0;
+ ticks_offs = 0;
+ tmr_ctr = 0;
+ next_event_time = 0xffffffff;
+ prev_event_time = 0;
+ curr_ticks = 0;
+ splx(flags);
}
static int
-timer_open (int dev, int mode)
+timer_open(int dev, int mode)
{
- if (opened)
- return RET_ERROR (EBUSY);
+ if (opened)
+ return -(EBUSY);
- tmr_reset ();
- curr_tempo = 60;
- curr_timebase = HZ;
- opened = 1;
- reprogram_timer ();
+ tmr_reset();
+ curr_tempo = 60;
+ curr_timebase = hz;
+ opened = 1;
+ reprogram_timer();
- return 0;
+ return 0;
}
static void
-timer_close (int dev)
+timer_close(int dev)
{
- opened = tmr_running = 0;
- gus_write8 (0x45, 0); /* Disable both timers */
+ opened = tmr_running = 0;
+ tmr->tmr_disable(tmr->dev);
}
static int
-timer_event (int dev, unsigned char *event)
+timer_event(int dev, u_char *event)
{
- unsigned char cmd = event[1];
- unsigned long parm = *(int *) &event[4];
+ u_char cmd = event[1];
+ u_long parm = *(int *) &event[4];
- switch (cmd)
- {
+ switch (cmd) {
case TMR_WAIT_REL:
- parm += prev_event_time;
+ parm += prev_event_time;
case TMR_WAIT_ABS:
- if (parm > 0)
- {
- long time;
+ if (parm > 0) {
+ long time;
- if (parm <= curr_ticks) /* It's the time */
- return TIMER_NOT_ARMED;
+ if (parm <= curr_ticks) /* It's the time */
+ return TIMER_NOT_ARMED;
- time = parm;
- next_event_time = prev_event_time = time;
+ time = parm;
+ next_event_time = prev_event_time = time;
- return TIMER_ARMED;
+ return TIMER_ARMED;
}
- break;
+ break;
case TMR_START:
- tmr_reset ();
- tmr_running = 1;
- reprogram_timer ();
- break;
+ tmr_reset();
+ tmr_running = 1;
+ reprogram_timer();
+ break;
case TMR_STOP:
- tmr_running = 0;
- break;
+ tmr_running = 0;
+ break;
case TMR_CONTINUE:
- tmr_running = 1;
- reprogram_timer ();
- break;
+ tmr_running = 1;
+ reprogram_timer();
+ break;
case TMR_TEMPO:
- if (parm)
- {
- if (parm < 8)
- parm = 8;
- if (parm > 250)
- parm = 250;
- tmr_offs = tmr_ctr;
- ticks_offs += tmr2ticks (tmr_ctr);
- tmr_ctr = 0;
- curr_tempo = parm;
- reprogram_timer ();
+ if (parm) {
+ if (parm < 8)
+ parm = 8;
+ if (parm > 250)
+ parm = 250;
+ tmr_offs = tmr_ctr;
+ ticks_offs += tmr2ticks(tmr_ctr);
+ tmr_ctr = 0;
+ curr_tempo = parm;
+ reprogram_timer();
}
- break;
+ break;
case TMR_ECHO:
- seq_copy_to_input (event, 8);
- break;
+ seq_copy_to_input(event, 8);
+ break;
default:;
}
- return TIMER_NOT_ARMED;
+ return TIMER_NOT_ARMED;
}
-static unsigned long
-timer_get_time (int dev)
+static u_long
+timer_get_time(int dev)
{
- if (!opened)
- return 0;
+ if (!opened)
+ return 0;
- return curr_ticks;
+ return curr_ticks;
}
static int
-timer_ioctl (int dev,
- unsigned int cmd, unsigned int arg)
+timer_ioctl(int dev, u_int cmd, ioctl_arg arg)
{
- switch (cmd)
- {
+ switch (cmd) {
case SNDCTL_TMR_SOURCE:
- return IOCTL_OUT (arg, TMR_INTERNAL);
- break;
+ return *(int *) arg = TMR_INTERNAL;
+ break;
case SNDCTL_TMR_START:
- tmr_reset ();
- tmr_running = 1;
- return 0;
- break;
+ tmr_reset();
+ tmr_running = 1;
+ return 0;
+ break;
case SNDCTL_TMR_STOP:
- tmr_running = 0;
- return 0;
- break;
+ tmr_running = 0;
+ return 0;
+ break;
case SNDCTL_TMR_CONTINUE:
- tmr_running = 1;
- return 0;
- break;
+ tmr_running = 1;
+ return 0;
+ break;
case SNDCTL_TMR_TIMEBASE:
- {
- int val = IOCTL_IN (arg);
-
- if (val)
- {
- if (val < 1)
- val = 1;
- if (val > 1000)
- val = 1000;
- curr_timebase = val;
- }
-
- return IOCTL_OUT (arg, curr_timebase);
- }
- break;
+ {
+ int val = (*(int *) arg);
+
+ if (val) {
+ if (val < 1)
+ val = 1;
+ if (val > 1000)
+ val = 1000;
+ curr_timebase = val;
+ }
+ return *(int *) arg = curr_timebase;
+ }
+ break;
case SNDCTL_TMR_TEMPO:
- {
- int val = IOCTL_IN (arg);
-
- if (val)
- {
- if (val < 8)
- val = 8;
- if (val > 250)
- val = 250;
- tmr_offs = tmr_ctr;
- ticks_offs += tmr2ticks (tmr_ctr);
- tmr_ctr = 0;
- curr_tempo = val;
- reprogram_timer ();
- }
-
- return IOCTL_OUT (arg, curr_tempo);
- }
- break;
+ {
+ int val = (*(int *) arg);
+
+ if (val) {
+ if (val < 8)
+ val = 8;
+ if (val > 250)
+ val = 250;
+ tmr_offs = tmr_ctr;
+ ticks_offs += tmr2ticks(tmr_ctr);
+ tmr_ctr = 0;
+ curr_tempo = val;
+ reprogram_timer();
+ }
+ return *(int *) arg = curr_tempo;
+ }
+ break;
case SNDCTL_SEQ_CTRLRATE:
- if (IOCTL_IN (arg) != 0) /* Can't change */
- return RET_ERROR (EINVAL);
+ if ((*(int *) arg) != 0) /* Can't change */
+ return -(EINVAL);
- return IOCTL_OUT (arg, ((curr_tempo * curr_timebase) + 30) / 60);
- break;
+ return *(int *) arg = ((curr_tempo * curr_timebase) + 30) / 60;
+ break;
case SNDCTL_TMR_METRONOME:
- /* NOP */
- break;
+ /* NOP */
+ break;
- default:
+ default:;
}
- return RET_ERROR (EINVAL);
+ return -(EINVAL);
}
static void
-timer_arm (int dev, long time)
+timer_arm(int dev, long time)
{
- if (time < 0)
- time = curr_ticks + 1;
- else if (time <= curr_ticks) /* It's the time */
- return;
+ if (time < 0)
+ time = curr_ticks + 1;
+ else if (time <= curr_ticks) /* It's the time */
+ return;
- next_event_time = prev_event_time = time;
+ next_event_time = prev_event_time = time;
- return;
+ return;
}
static struct sound_timer_operations sound_timer =
{
- {"OPL-3/GUS Timer", 0},
- 1, /* Priority */
- 0, /* Local device link */
- timer_open,
- timer_close,
- timer_event,
- timer_get_time,
- timer_ioctl,
- timer_arm
+ {"GUS Timer", 0},
+ 1, /* Priority */
+ 0, /* Local device link */
+ timer_open,
+ timer_close,
+ timer_event,
+ timer_get_time,
+ timer_ioctl,
+ timer_arm
};
void
-sound_timer_interrupt (void)
+sound_timer_interrupt(void)
{
- gus_write8 (0x45, 0); /* Ack IRQ */
- timer_command (4, 0x80); /* Reset IRQ flags */
+ if (!opened)
+ return;
- if (!opened)
- return;
+ tmr->tmr_restart(tmr->dev);
- if (curr_timer == 1)
- gus_write8 (0x45, 0x04); /* Start timer 1 again */
- else
- gus_write8 (0x45, 0x08); /* Start timer 2 again */
+ if (!tmr_running)
+ return;
- if (!tmr_running)
- return;
+ tmr_ctr++;
+ curr_ticks = ticks_offs + tmr2ticks(tmr_ctr);
- tmr_ctr++;
- curr_ticks = ticks_offs + tmr2ticks (tmr_ctr);
-
- if (curr_ticks >= next_event_time)
- {
- next_event_time = 0xffffffff;
- sequencer_timer ();
+ if (curr_ticks >= next_event_time) {
+ next_event_time = 0xffffffff;
+ sequencer_timer(0);
}
}
void
-sound_timer_init (int io_base)
+sound_timer_init(struct sound_lowlev_timer * t, char *name)
{
- int n;
+ int n;
- if (initialized)
- return; /* There is already a similar timer */
+ if (initialized || t == NULL)
+ return; /* There is already a similar timer */
- select_addr = io_base;
- data_addr = io_base + 1;
+ initialized = 1;
+ tmr = t;
- initialized = 1;
+ if (num_sound_timers >= MAX_TIMER_DEV)
+ n = 0; /* Overwrite the system timer */
+ else
+ n = num_sound_timers++;
-#if 1
- if (num_sound_timers >= MAX_TIMER_DEV)
- n = 0; /* Overwrite the system timer */
- else
- n = num_sound_timers++;
-#else
- n = 0;
-#endif
+ strcpy(sound_timer.info.name, name);
- sound_timer_devs[n] = &sound_timer;
+ sound_timer_devs[n] = &sound_timer;
}
#endif
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