1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/rpmsg/rpmsg_client_sample.c b/drivers/rpmsg/rpmsg_client_sample.c
new file mode 100644
index 0000000..a3f5013
--- /dev/null
+++ b/drivers/rpmsg/rpmsg_client_sample.c
@@ -0,0 +1,100 @@
+/*
+ * Remote processor messaging transport - sample client driver
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/virtio.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/rpmsg.h>
+
+#define MSG		("hello world!")
+#define MSG_LIMIT	100
+
+static void rpmsg_sample_cb(struct rpmsg_channel *rpdev, void *data, int len,
+						void *priv, u32 src)
+{
+	int err;
+	static int rx_count;
+
+	dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n", ++rx_count, src);
+
+	print_hex_dump(KERN_DEBUG, __func__, DUMP_PREFIX_NONE, 16, 1,
+		       data, len,  true);
+
+	/* samples should not live forever */
+	if (rx_count >= MSG_LIMIT) {
+		dev_info(&rpdev->dev, "goodbye!\n");
+		return;
+	}
+
+	/* send a new message now */
+	err = rpmsg_send(rpdev, MSG, strlen(MSG));
+	if (err)
+		pr_err("rpmsg_send failed: %d\n", err);
+}
+
+static int rpmsg_sample_probe(struct rpmsg_channel *rpdev)
+{
+	int err;
+
+	dev_info(&rpdev->dev, "new channel: 0x%x <-> 0x%x!\n",
+			rpdev->src, rpdev->dst);
+
+	/* send a message to our remote processor */
+	err = rpmsg_send(rpdev, MSG, strlen(MSG));
+	if (err) {
+		pr_err("rpmsg_send failed: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static void __devexit rpmsg_sample_remove(struct rpmsg_channel *rpdev)
+{
+	dev_info(&rpdev->dev, "rpmsg sample client driver is removed\n");
+}
+
+static struct rpmsg_device_id rpmsg_driver_sample_id_table[] = {
+	{ .name	= "rpmsg-client-sample" },
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, rpmsg_driver_sample_id_table);
+
+static struct rpmsg_driver rpmsg_sample_client_driver = {
+	.drv.name	= KBUILD_MODNAME,
+	.drv.owner	= THIS_MODULE,
+	.id_table	= rpmsg_driver_sample_id_table,
+	.probe		= rpmsg_sample_probe,
+	.callback	= rpmsg_sample_cb,
+	.remove		= __devexit_p(rpmsg_sample_remove),
+};
+
+static int __init init(void)
+{
+	return register_rpmsg_driver(&rpmsg_sample_client_driver);
+}
+
+static void __exit fini(void)
+{
+	unregister_rpmsg_driver(&rpmsg_sample_client_driver);
+}
+module_init(init);
+module_exit(fini);
+
+MODULE_DESCRIPTION("Virtio remote processor messaging sample client driver");
+MODULE_LICENSE("GPL v2");