/* * Remote processor messaging - sample client driver * * Copyright (C) 2011 Texas Instruments, Inc. * Copyright (C) 2011 Google, Inc. * * Ohad Ben-Cohen * Brian Swetland * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #define MSG "hello world!" #define MSG_LIMIT 100 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(KERN_DEBUG, __func__, DUMP_PREFIX_NONE, 16, 1, data, len, true); /* samples should not live forever */ if (idata->rx_count >= MSG_LIMIT) { 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"); earch' size='10' name='q' value=''/>

path: root/net/nfc/nci/hci.c

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