9a703eb720
The current rpmsg_client_sample uses a fixed number of messages to be sent to each instance. This is currently set at 100. Introduce an optional module parameter 'count' so that the number of messages to be exchanged can be made flexible. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#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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static int count = 100;
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module_param(count, int, 0644);
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struct instance_data {
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int rx_count;
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};
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static int rpmsg_sample_cb(struct rpmsg_device *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_debug(__func__, DUMP_PREFIX_NONE, 16, 1, data, len,
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true);
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/* samples should not live forever */
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if (idata->rx_count >= count) {
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dev_info(&rpdev->dev, "goodbye!\n");
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return 0;
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}
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/* send a new message now */
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ret = rpmsg_send(rpdev->ept, 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 0;
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}
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static int rpmsg_sample_probe(struct rpmsg_device *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->ept, 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_device *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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