aboutsummaryrefslogtreecommitdiff
path: root/sound/oss/sound_timer.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/oss/sound_timer.c')
-rw-r--r--sound/oss/sound_timer.c327
1 files changed, 0 insertions, 327 deletions
diff --git a/sound/oss/sound_timer.c b/sound/oss/sound_timer.c
deleted file mode 100644
index 3a444a6f10eb..000000000000
--- a/sound/oss/sound_timer.c
+++ /dev/null
@@ -1,327 +0,0 @@
-/*
- * sound/oss/sound_timer.c
- */
-/*
- * 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.
- */
-/*
- * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
- */
-#include <linux/string.h>
-#include <linux/spinlock.h>
-
-#include "sound_config.h"
-
-static volatile int initialized, opened, tmr_running;
-static volatile unsigned int tmr_offs, tmr_ctr;
-static volatile unsigned 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 unsigned long usecs_per_tmr; /* Length of the current interval */
-
-static struct sound_lowlev_timer *tmr;
-static DEFINE_SPINLOCK(lock);
-
-static unsigned long tmr2ticks(int tmr_value)
-{
- /*
- * Convert timer ticks to MIDI ticks
- */
-
- unsigned long tmp;
- unsigned long scale;
-
- tmp = tmr_value * usecs_per_tmr; /* Convert to usecs */
- scale = (60 * 1000000) / (curr_tempo * curr_timebase); /* usecs per MIDI tick */
- return (tmp + (scale / 2)) / scale;
-}
-
-void reprogram_timer(void)
-{
- unsigned long usecs_per_tick;
-
- /*
- * The user is changing the timer rate before setting a timer
- * slap, bad bad not allowed.
- */
-
- if(!tmr)
- return;
-
- 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;
-
- usecs_per_tmr = tmr->tmr_start(tmr->dev, usecs_per_tick);
-}
-
-void sound_timer_syncinterval(unsigned int new_usecs)
-{
- /*
- * 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;
-}
-EXPORT_SYMBOL(sound_timer_syncinterval);
-
-static void tmr_reset(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&lock,flags);
- tmr_offs = 0;
- ticks_offs = 0;
- tmr_ctr = 0;
- next_event_time = (unsigned long) -1;
- prev_event_time = 0;
- curr_ticks = 0;
- spin_unlock_irqrestore(&lock,flags);
-}
-
-static int timer_open(int dev, int mode)
-{
- if (opened)
- return -EBUSY;
- tmr_reset();
- curr_tempo = 60;
- curr_timebase = 100;
- opened = 1;
- reprogram_timer();
- return 0;
-}
-
-static void timer_close(int dev)
-{
- opened = tmr_running = 0;
- tmr->tmr_disable(tmr->dev);
-}
-
-static int timer_event(int dev, unsigned char *event)
-{
- unsigned char cmd = event[1];
- unsigned long parm = *(int *) &event[4];
-
- switch (cmd)
- {
- case TMR_WAIT_REL:
- parm += prev_event_time;
- case TMR_WAIT_ABS:
- if (parm > 0)
- {
- long time;
-
- if (parm <= curr_ticks) /* It's the time */
- return TIMER_NOT_ARMED;
- time = parm;
- next_event_time = prev_event_time = time;
- return TIMER_ARMED;
- }
- break;
-
- case TMR_START:
- tmr_reset();
- tmr_running = 1;
- reprogram_timer();
- break;
-
- case TMR_STOP:
- tmr_running = 0;
- break;
-
- case TMR_CONTINUE:
- 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();
- }
- break;
-
- case TMR_ECHO:
- seq_copy_to_input(event, 8);
- break;
-
- default:;
- }
- return TIMER_NOT_ARMED;
-}
-
-static unsigned long timer_get_time(int dev)
-{
- if (!opened)
- return 0;
- return curr_ticks;
-}
-
-static int timer_ioctl(int dev, unsigned int cmd, void __user *arg)
-{
- int __user *p = arg;
- int val;
-
- switch (cmd)
- {
- case SNDCTL_TMR_SOURCE:
- val = TMR_INTERNAL;
- break;
-
- case SNDCTL_TMR_START:
- tmr_reset();
- tmr_running = 1;
- return 0;
-
- case SNDCTL_TMR_STOP:
- tmr_running = 0;
- return 0;
-
- case SNDCTL_TMR_CONTINUE:
- tmr_running = 1;
- return 0;
-
- case SNDCTL_TMR_TIMEBASE:
- if (get_user(val, p))
- return -EFAULT;
- if (val)
- {
- if (val < 1)
- val = 1;
- if (val > 1000)
- val = 1000;
- curr_timebase = val;
- }
- val = curr_timebase;
- break;
-
- case SNDCTL_TMR_TEMPO:
- if (get_user(val, p))
- return -EFAULT;
- 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();
- }
- val = curr_tempo;
- break;
-
- case SNDCTL_SEQ_CTRLRATE:
- if (get_user(val, p))
- return -EFAULT;
- if (val != 0) /* Can't change */
- return -EINVAL;
- val = ((curr_tempo * curr_timebase) + 30) / 60;
- break;
-
- case SNDCTL_SEQ_GETTIME:
- val = curr_ticks;
- break;
-
- case SNDCTL_TMR_METRONOME:
- default:
- return -EINVAL;
- }
- return put_user(val, p);
-}
-
-static void timer_arm(int dev, long time)
-{
- if (time < 0)
- time = curr_ticks + 1;
- else if (time <= curr_ticks) /* It's the time */
- return;
-
- next_event_time = prev_event_time = time;
- return;
-}
-
-static struct sound_timer_operations sound_timer =
-{
- .owner = THIS_MODULE,
- .info = {"Sound Timer", 0},
- .priority = 1, /* Priority */
- .devlink = 0, /* Local device link */
- .open = timer_open,
- .close = timer_close,
- .event = timer_event,
- .get_time = timer_get_time,
- .ioctl = timer_ioctl,
- .arm_timer = timer_arm
-};
-
-void sound_timer_interrupt(void)
-{
- unsigned long flags;
-
- if (!opened)
- return;
-
- tmr->tmr_restart(tmr->dev);
-
- if (!tmr_running)
- return;
-
- spin_lock_irqsave(&lock,flags);
- tmr_ctr++;
- curr_ticks = ticks_offs + tmr2ticks(tmr_ctr);
-
- if (curr_ticks >= next_event_time)
- {
- next_event_time = (unsigned long) -1;
- sequencer_timer(0);
- }
- spin_unlock_irqrestore(&lock,flags);
-}
-EXPORT_SYMBOL(sound_timer_interrupt);
-
-void sound_timer_init(struct sound_lowlev_timer *t, char *name)
-{
- int n;
-
- if (initialized)
- {
- if (t->priority <= tmr->priority)
- return; /* There is already a similar or better timer */
- tmr = t;
- return;
- }
- initialized = 1;
- tmr = t;
-
- n = sound_alloc_timerdev();
- if (n == -1)
- n = 0; /* Overwrite the system timer */
- strlcpy(sound_timer.info.name, name, sizeof(sound_timer.info.name));
- sound_timer_devs[n] = &sound_timer;
-}
-EXPORT_SYMBOL(sound_timer_init);
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 13:41:37 +0000