Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 323 insertions, 0 deletions

diff --git a/sound/oss/sound_timer.c b/sound/oss/sound_timer.c
new file mode 100644
index 000000000000..bc2777dd2ef9
--- /dev/null
+++ b/sound/oss/sound_timer.c
@@ -0,0 +1,323 @@
+/*
+ * sound/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 time_t 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 spinlock_t 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;
+}
+
+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);
+}
+
+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 */
+        strcpy(sound_timer.info.name, name);
+        sound_timer_devs[n] = &sound_timer;
+}