You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
2.6 KiB
100 lines
2.6 KiB
/* |
|
* Remote processor messaging - 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. |
|
* |
|
* 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. |
|
*/ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/module.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 ret; |
|
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 */ |
|
ret = rpmsg_send(rpdev, MSG, strlen(MSG)); |
|
if (ret) |
|
dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret); |
|
} |
|
|
|
static int rpmsg_sample_probe(struct rpmsg_channel *rpdev) |
|
{ |
|
int ret; |
|
|
|
dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n", |
|
rpdev->src, rpdev->dst); |
|
|
|
/* send a message to our remote processor */ |
|
ret = rpmsg_send(rpdev, MSG, strlen(MSG)); |
|
if (ret) { |
|
dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void 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(rpmsg, rpmsg_driver_sample_id_table); |
|
|
|
static struct rpmsg_driver rpmsg_sample_client = { |
|
.drv.name = KBUILD_MODNAME, |
|
.drv.owner = THIS_MODULE, |
|
.id_table = rpmsg_driver_sample_id_table, |
|
.probe = rpmsg_sample_probe, |
|
.callback = rpmsg_sample_cb, |
|
.remove = rpmsg_sample_remove, |
|
}; |
|
|
|
static int __init rpmsg_client_sample_init(void) |
|
{ |
|
return register_rpmsg_driver(&rpmsg_sample_client); |
|
} |
|
module_init(rpmsg_client_sample_init); |
|
|
|
static void __exit rpmsg_client_sample_fini(void) |
|
{ |
|
unregister_rpmsg_driver(&rpmsg_sample_client); |
|
} |
|
module_exit(rpmsg_client_sample_fini); |
|
|
|
MODULE_DESCRIPTION("Remote processor messaging sample client driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|