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diff --git a/carlfw/src/pattern_generator.c b/carlfw/src/pattern_generator.c
new file mode 100644
index 0000000..7cadb12
--- /dev/null
+++ b/carlfw/src/pattern_generator.c
@@ -0,0 +1,57 @@
+/*
+ * carl9170 firmware - used by the ar9170 wireless device
+ *
+ * pattern generator
+ *
+ * Copyright 2013	Christian Lamparter <chunkeey@googlemail.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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "carl9170.h"
+#include "pattern_generator.h"
+#include "fwdsc.h"
+#include "timer.h"
+
+#if defined(CONFIG_CARL9170FW_PATTERN_GENERATOR)
+
+void pattern_generator(void)
+{
+	if (fw.phy.state == CARL9170_PHY_ON) {
+		if (likely(fw.wlan.soft_pattern == NO_PATTERN ||
+		    fw.wlan.soft_pattern >= __CARL9170FW_NUM_PATTERNS))
+			return;
+
+		const struct pattern_info *pattern = &patterns[fw.wlan.soft_pattern];
+		if (pattern->pulses >= fw.wlan.pattern_index) {
+			fw.wlan.pattern_index = 0;
+		}
+
+		if (pattern->pulses > fw.wlan.pattern_index) {
+			const struct pattern_pulse_info *ppi = &pattern->pattern[fw.wlan.pattern_index];
+			if (is_after_usecs(fw.wlan.pattern_last, ppi->pulse_interval)) {
+				fw.wlan.pattern_last = get_clock_counter();
+				set(0x1C3BC0, ppi->pulse_pattern);
+				set(0x1C3BBC, ppi->pulse_mode);
+				udelay(ppi->pulse_width);
+				set(0x1C3BBC, 0);
+				set(0x1C3BC0, 0);
+				fw.wlan.pattern_index++;
+			}
+		}
+	}
+}
+
+#endif /* CONFIG_CONFIG_CARL9170FW_RADAR */