2 * Remote processor messaging transport - sample server driver
4 * Copyright (C) 2011 Texas Instruments, Inc.
5 * Copyright (C) 2011 Google, Inc.
7 * Ohad Ben-Cohen <ohad@wizery.com>
8 * Brian Swetland <swetland@google.com>
10 * This software is licensed under the terms of the GNU General Public
11 * License version 2, as published by the Free Software Foundation, and
12 * may be copied, distributed, and modified under those terms.
15 #define pr_fmt(fmt) "%s: " fmt, __func__
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/virtio.h>
20 #include <linux/scatterlist.h>
21 #include <linux/slab.h>
22 #include <linux/rpmsg.h>
24 #define MSG ("hello world!")
27 static void rpmsg_sample_cb(struct rpmsg_channel
*rpdev
, void *data
, int len
,
33 dev_info(&rpdev
->dev
, "incoming msg %d (src: 0x%x)\n", ++rx_count
, src
);
35 print_hex_dump(KERN_DEBUG
, __func__
, DUMP_PREFIX_NONE
, 16, 1,
38 /* samples should not live forever */
39 if (rx_count
>= MSG_LIMIT
) {
40 dev_info(&rpdev
->dev
, "goodbye!\n");
45 err
= rpmsg_sendto(rpdev
, MSG
, strlen(MSG
), src
);
47 pr_err("rpmsg_send failed: %d\n", err
);
50 static int rpmsg_sample_probe(struct rpmsg_channel
*rpdev
)
54 dev_info(&rpdev
->dev
, "new channel: 0x%x -> 0x%x!\n",
55 rpdev
->src
, rpdev
->dst
);
57 err
= rpmsg_sendto(rpdev
, MSG
, strlen(MSG
), 50);
59 pr_err("rpmsg_send failed: %d\n", err
);
66 static void __devexit
rpmsg_sample_remove(struct rpmsg_channel
*rpdev
)
68 dev_info(&rpdev
->dev
, "rpmsg sample driver is removed\n");
71 static struct rpmsg_device_id rpmsg_driver_sample_id_table
[] = {
72 { .name
= "rpmsg-server-sample" },
75 MODULE_DEVICE_TABLE(platform
, rpmsg_driver_sample_id_table
);
77 static struct rpmsg_driver rpmsg_sample_server_driver
= {
78 .drv
.name
= KBUILD_MODNAME
,
79 .drv
.owner
= THIS_MODULE
,
80 .id_table
= rpmsg_driver_sample_id_table
,
81 .probe
= rpmsg_sample_probe
,
82 .callback
= rpmsg_sample_cb
,
83 .remove
= __devexit_p(rpmsg_sample_remove
),
86 static int __init
init(void)
88 return register_rpmsg_driver(&rpmsg_sample_server_driver
);
91 static void __exit
fini(void)
93 unregister_rpmsg_driver(&rpmsg_sample_server_driver
);
98 MODULE_DESCRIPTION("Virtio remote processor messaging sample driver");
99 MODULE_LICENSE("GPL v2");