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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697// SPDX-License-Identifier: GPL-2.0-only/* * 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> */
#include <linux/kernel.h>#include <linux/module.h>#include <linux/rpmsg.h>
#define MSG "hello world!"
static int count = 100;module_param(count, int, 0644);
struct instance_data { int rx_count;};
static int rpmsg_sample_cb(struct rpmsg_device *rpdev, void *data, int len, void *priv, u32 src){ int ret; struct instance_data *idata = dev_get_drvdata(&rpdev->dev);
dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n", ++idata->rx_count, src);
print_hex_dump_debug(__func__, DUMP_PREFIX_NONE, 16, 1, data, len, true);
/* samples should not live forever */ if (idata->rx_count >= count) { dev_info(&rpdev->dev, "goodbye!\n"); return 0; }
/* send a new message now */ ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG)); if (ret) dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
return 0;}
static int rpmsg_sample_probe(struct rpmsg_device *rpdev){ int ret; struct instance_data *idata;
dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n", rpdev->src, rpdev->dst);
idata = devm_kzalloc(&rpdev->dev, sizeof(*idata), GFP_KERNEL); if (!idata) return -ENOMEM;
dev_set_drvdata(&rpdev->dev, idata);
/* send a message to our remote processor */ ret = rpmsg_send(rpdev->ept, 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_device *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, .id_table = rpmsg_driver_sample_id_table, .probe = rpmsg_sample_probe, .callback = rpmsg_sample_cb, .remove = rpmsg_sample_remove,};module_rpmsg_driver(rpmsg_sample_client);
MODULE_DESCRIPTION("Remote processor messaging sample client driver");MODULE_LICENSE("GPL v2");