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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /samples/rpmsg
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'samples/rpmsg')
-rw-r--r--samples/rpmsg/Makefile2
-rw-r--r--samples/rpmsg/rpmsg_client_sample.c96
2 files changed, 98 insertions, 0 deletions
diff --git a/samples/rpmsg/Makefile b/samples/rpmsg/Makefile
new file mode 100644
index 000000000..ddf9a5d13
--- /dev/null
+++ b/samples/rpmsg/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_SAMPLE_RPMSG_CLIENT) += rpmsg_client_sample.o
diff --git a/samples/rpmsg/rpmsg_client_sample.c b/samples/rpmsg/rpmsg_client_sample.c
new file mode 100644
index 000000000..ae5081662
--- /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");