Linux-2.6.12-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!
diff --git a/sound/oss/sys_timer.c b/sound/oss/sys_timer.c
new file mode 100644
index 0000000..6afe29b
--- /dev/null
+++ b/sound/oss/sys_timer.c
@@ -0,0 +1,289 @@
+/*
+ * sound/sys_timer.c
+ *
+ * The default timer for the Level 2 sequencer interface
+ * Uses the (1/HZ sec) timer of kernel.
+ */
+/*
+ * 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)
+ * Andrew Veliath : adapted tmr2ticks from level 1 sequencer (avoid overflow)
+ */
+#include <linux/spinlock.h>
+#include "sound_config.h"
+
+static volatile int 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 void poll_def_tmr(unsigned long dummy);
+static DEFINE_SPINLOCK(lock);
+
+static struct timer_list def_tmr = TIMER_INITIALIZER(poll_def_tmr, 0, 0);
+
+static unsigned long
+tmr2ticks(int tmr_value)
+{
+ /*
+ * Convert timer ticks to MIDI ticks
+ */
+
+ unsigned long tmp;
+ unsigned long scale;
+
+ /* tmr_value (ticks per sec) *
+ 1000000 (usecs per sec) / HZ (ticks per sec) -=> usecs */
+ tmp = tmr_value * (1000000 / HZ);
+ scale = (60 * 1000000) / (curr_tempo * curr_timebase); /* usecs per MIDI tick */
+ return (tmp + scale / 2) / scale;
+}
+
+static void
+poll_def_tmr(unsigned long dummy)
+{
+
+ if (opened)
+ {
+
+ {
+ def_tmr.expires = (1) + jiffies;
+ add_timer(&def_tmr);
+ };
+
+ if (tmr_running)
+ {
+ spin_lock(&lock);
+ 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(&lock);
+ }
+ }
+}
+
+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
+def_tmr_open(int dev, int mode)
+{
+ if (opened)
+ return -EBUSY;
+
+ tmr_reset();
+ curr_tempo = 60;
+ curr_timebase = 100;
+ opened = 1;
+
+ ;
+
+ {
+ def_tmr.expires = (1) + jiffies;
+ add_timer(&def_tmr);
+ };
+
+ return 0;
+}
+
+static void
+def_tmr_close(int dev)
+{
+ opened = tmr_running = 0;
+ del_timer(&def_tmr);
+}
+
+static int
+def_tmr_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;
+ break;
+
+ case TMR_STOP:
+ tmr_running = 0;
+ break;
+
+ case TMR_CONTINUE:
+ tmr_running = 1;
+ break;
+
+ case TMR_TEMPO:
+ if (parm)
+ {
+ if (parm < 8)
+ parm = 8;
+ if (parm > 360)
+ parm = 360;
+ tmr_offs = tmr_ctr;
+ ticks_offs += tmr2ticks(tmr_ctr);
+ tmr_ctr = 0;
+ curr_tempo = parm;
+ }
+ break;
+
+ case TMR_ECHO:
+ seq_copy_to_input(event, 8);
+ break;
+
+ default:;
+ }
+
+ return TIMER_NOT_ARMED;
+}
+
+static unsigned long
+def_tmr_get_time(int dev)
+{
+ if (!opened)
+ return 0;
+
+ return curr_ticks;
+}
+
+/* same as sound_timer.c:timer_ioctl!? */
+static int def_tmr_ioctl(int dev, unsigned int cmd, void __user *arg)
+{
+ int __user *p = arg;
+ int val;
+
+ switch (cmd) {
+ case SNDCTL_TMR_SOURCE:
+ return __put_user(TMR_INTERNAL, p);
+
+ 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;
+ }
+ return __put_user(curr_timebase, p);
+
+ 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();
+ }
+ return __put_user(curr_tempo, p);
+
+ 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;
+ return __put_user(val, p);
+
+ case SNDCTL_SEQ_GETTIME:
+ return __put_user(curr_ticks, p);
+
+ case SNDCTL_TMR_METRONOME:
+ /* NOP */
+ break;
+
+ default:;
+ }
+ return -EINVAL;
+}
+
+static void
+def_tmr_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;
+}
+
+struct sound_timer_operations default_sound_timer =
+{
+ .owner = THIS_MODULE,
+ .info = {"System clock", 0},
+ .priority = 0, /* Priority */
+ .devlink = 0, /* Local device link */
+ .open = def_tmr_open,
+ .close = def_tmr_close,
+ .event = def_tmr_event,
+ .get_time = def_tmr_get_time,
+ .ioctl = def_tmr_ioctl,
+ .arm_timer = def_tmr_arm
+};