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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /samples/rpmsg/rpmsg_client_sample.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'samples/rpmsg/rpmsg_client_sample.c')
-rw-r--r-- | samples/rpmsg/rpmsg_client_sample.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/samples/rpmsg/rpmsg_client_sample.c b/samples/rpmsg/rpmsg_client_sample.c new file mode 100644 index 0000000000..ae50816622 --- /dev/null +++ b/samples/rpmsg/rpmsg_client_sample.c @@ -0,0 +1,96 @@ +// 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"); |