a138c88319
The current rpmsg_client_sample is a very simple example and is not designed to handle multiple instances. Add support for multiple instances, so that the same number of pings are sent to each instance. The instances can be on one or multiple remote processors. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
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* Remote processor messaging - sample client driver
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*
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* Copyright (C) 2011 Texas Instruments, Inc.
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* Copyright (C) 2011 Google, Inc.
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*
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* Ohad Ben-Cohen <ohad@wizery.com>
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* Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/rpmsg.h>
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#define MSG "hello world!"
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#define MSG_LIMIT 100
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struct instance_data {
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int rx_count;
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};
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static void rpmsg_sample_cb(struct rpmsg_channel *rpdev, void *data, int len,
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void *priv, u32 src)
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{
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int ret;
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struct instance_data *idata = dev_get_drvdata(&rpdev->dev);
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dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n",
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++idata->rx_count, src);
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print_hex_dump(KERN_DEBUG, __func__, DUMP_PREFIX_NONE, 16, 1,
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data, len, true);
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/* samples should not live forever */
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if (idata->rx_count >= MSG_LIMIT) {
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dev_info(&rpdev->dev, "goodbye!\n");
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return;
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}
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/* send a new message now */
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ret = rpmsg_send(rpdev, MSG, strlen(MSG));
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if (ret)
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dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
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}
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static int rpmsg_sample_probe(struct rpmsg_channel *rpdev)
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{
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int ret;
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struct instance_data *idata;
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dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n",
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rpdev->src, rpdev->dst);
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idata = devm_kzalloc(&rpdev->dev, sizeof(*idata), GFP_KERNEL);
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if (!idata)
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return -ENOMEM;
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dev_set_drvdata(&rpdev->dev, idata);
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/* send a message to our remote processor */
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ret = rpmsg_send(rpdev, MSG, strlen(MSG));
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if (ret) {
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dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static void rpmsg_sample_remove(struct rpmsg_channel *rpdev)
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{
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dev_info(&rpdev->dev, "rpmsg sample client driver is removed\n");
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}
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static struct rpmsg_device_id rpmsg_driver_sample_id_table[] = {
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{ .name = "rpmsg-client-sample" },
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{ },
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};
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MODULE_DEVICE_TABLE(rpmsg, rpmsg_driver_sample_id_table);
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static struct rpmsg_driver rpmsg_sample_client = {
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.drv.name = KBUILD_MODNAME,
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.id_table = rpmsg_driver_sample_id_table,
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.probe = rpmsg_sample_probe,
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.callback = rpmsg_sample_cb,
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.remove = rpmsg_sample_remove,
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};
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module_rpmsg_driver(rpmsg_sample_client);
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MODULE_DESCRIPTION("Remote processor messaging sample client driver");
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MODULE_LICENSE("GPL v2");
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