1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/dahdi/dahdi_echocan_jpah.c b/drivers/dahdi/dahdi_echocan_jpah.c
new file mode 100644
index 0000000..cddbc01
--- /dev/null
+++ b/drivers/dahdi/dahdi_echocan_jpah.c
@@ -0,0 +1,130 @@
+/*
+ * ECHO_CAN_JPAH
+ *
+ * by Jason Parker
+ *
+ * Based upon mg2ec.h - sort of.
+ * This "echo can" will completely hose your audio.
+ * Don't use it unless you're absolutely sure you know what you're doing.
+ *
+ * Copyright (C) 2007-2008, Digium, Inc.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ * 
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA. 
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/ctype.h>
+#include <linux/moduleparam.h>
+
+#include <dahdi/kernel.h>
+
+static int debug;
+
+#define module_printk(level, fmt, args...) printk(level "%s: " fmt, THIS_MODULE->name, ## args)
+#define debug_printk(level, fmt, args...) if (debug >= level) printk("%s (%s): " fmt, THIS_MODULE->name, __FUNCTION__, ## args)
+
+struct echo_can_state {
+	int blah;
+};
+
+static int echo_can_create(struct dahdi_echocanparams *ecp, struct dahdi_echocanparam *p,
+			   struct echo_can_state **ec)
+{
+	unsigned int x;
+	char *c;
+
+	if ((*ec = kmalloc(sizeof(**ec), GFP_KERNEL))) {
+		memset(ec, 0, sizeof(**ec));
+	}
+
+	for (x = 0; x < ecp->param_count; x++) {
+		for (c = p[x].name; *c; c++)
+			*c = tolower(*c);
+		printk(KERN_WARNING "Unknown parameter supplied to JPAH echo canceler: '%s'\n", p[x].name);
+		kfree(*ec);
+
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void echo_can_free(struct echo_can_state *ec)
+{
+	kfree(ec);
+}
+
+static void echo_can_update(struct echo_can_state *ec, short *iref, short *isig)
+{
+	unsigned int x;
+
+	for (x = 0; x < DAHDI_CHUNKSIZE; x++) {
+		if (ec->blah < 2) {
+			ec->blah++;
+
+			*isig++ = 0;
+		} else {
+			ec->blah = 0;
+			
+			isig++;
+		}
+	}
+}
+
+static int echo_can_traintap(struct echo_can_state *ec, int pos, short val)
+{
+	return 0;
+}
+
+static const struct dahdi_echocan me = {
+	.name = "JPAH",
+	.owner = THIS_MODULE,
+	.echo_can_create = echo_can_create,
+	.echo_can_free = echo_can_free,
+	.echo_can_array_update = echo_can_update,
+	.echo_can_traintap = echo_can_traintap,
+};
+
+static int __init mod_init(void)
+{
+	if (dahdi_register_echocan(&me)) {
+		module_printk(KERN_ERR, "could not register with DAHDI core\n");
+
+		return -EPERM;
+	}
+
+	module_printk(KERN_NOTICE, "Registered echo canceler '%s'\n", me.name);
+
+	return 0;
+}
+
+static void __exit mod_exit(void)
+{
+	dahdi_unregister_echocan(&me);
+}
+
+module_param(debug, int, S_IRUGO | S_IWUSR);
+
+MODULE_DESCRIPTION("DAHDI Jason Parker Audio Hoser");
+MODULE_AUTHOR("Jason Parker <jparker@digium.com>");
+MODULE_LICENSE("GPL v2");
+
+module_init(mod_init);
+module_exit(mod_exit);