add package snd-pcxhr-dkms

1 files changed, 78 insertions, 0 deletions

diff --git a/snd-pcxhr-dkms/src/pcxhr_hrtimer.c b/snd-pcxhr-dkms/src/pcxhr_hrtimer.c
new file mode 100644
index 0000000..172b713
--- /dev/null
+++ b/snd-pcxhr-dkms/src/pcxhr_hrtimer.c
@@ -0,0 +1,78 @@
+/*
+ * Driver for Digigram pcxhr compatible soundcards
+ *
+ * Copyright (c) 2004 by Digigram <alsa@digigram.com>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+
+#include "pcxhr_hrtimer.h"
+
+void pcxhr_hr_timer_tasklet(unsigned long data)
+{
+	pcxhr_interrupt(0, (void*)data);
+}
+
+enum hrtimer_restart pcxhr_hr_timer_callback(struct hrtimer* hr_timer)
+{
+	struct pcxhr_mgr *mgr;
+
+	mgr = container_of(hr_timer, struct pcxhr_mgr, hr_timer);
+	if (!atomic_read(&mgr->hr_timer_running))
+		return HRTIMER_NORESTART;
+	tasklet_schedule(&mgr->hr_timer_tasklet);
+	hrtimer_forward_now(hr_timer, mgr->hr_timer_period_time);
+	return HRTIMER_RESTART;
+}
+
+
+void pcxhr_hr_timer_trig(struct pcxhr_mgr *mgr, int start, unsigned int rate) {
+	if (start)
+	{
+		unsigned int period = mgr->granularity/2;
+		long sec;
+		unsigned long nsecs;
+
+		sec = period/rate;
+		period %= rate;
+		nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);
+
+		tasklet_kill(&mgr->hr_timer_tasklet); // Make sure the tasklet is not running.
+		mgr->hr_timer_period_time = ktime_set(sec, nsecs);
+		atomic_set(&mgr->hr_timer_running, 1);
+		hrtimer_start(&mgr->hr_timer, mgr->hr_timer_period_time, HRTIMER_MODE_REL);
+	}
+	else
+	{
+		atomic_set(&mgr->hr_timer_running, 0);
+		hrtimer_cancel(&mgr->hr_timer);
+	}
+
+}
+
+
+void pcxhr_hr_timer_init(struct pcxhr_mgr *mgr) {
+	hrtimer_init( &mgr->hr_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL );
+	mgr->hr_timer.function = pcxhr_hr_timer_callback;
+	atomic_set(&mgr->hr_timer_running, 0);
+	tasklet_init(&mgr->hr_timer_tasklet, pcxhr_hr_timer_tasklet,
+		     (unsigned long)mgr);
+
+}
+
+void pcxhr_hr_timer_kill(struct pcxhr_mgr *mgr) {
+	tasklet_kill(&mgr->hr_timer_tasklet);
+}