/* * Copyright (c) 2015, Sony Mobile Communications Inc. * Copyright (c) 2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * 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 <linux/module.h> #include <linux/skbuff.h> #include <linux/rpmsg.h> #include "qrtr.h" struct qrtr_smd_dev { struct qrtr_endpoint ep; struct rpmsg_endpoint *channel; struct device *dev; }; /* from smd to qrtr */ static int qcom_smd_qrtr_callback(struct rpmsg_device *rpdev, void *data, int len, void *priv, u32 addr) { struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev); int rc; if (!qdev) return -EAGAIN; rc = qrtr_endpoint_post(&qdev->ep, data, len); if (rc == -EINVAL) { dev_err(qdev->dev, "invalid ipcrouter packet\n"); /* return 0 to let smd drop the packet */ rc = 0; } return rc; } /* from qrtr to smd */ static int qcom_smd_qrtr_send(struct qrtr_endpoint *ep, struct sk_buff *skb) { struct qrtr_smd_dev *qdev = container_of(ep, struct qrtr_smd_dev, ep); int rc; rc = skb_linearize(skb); if (rc) goto out; rc = rpmsg_send(qdev->channel, skb->data, skb->len); out: if (rc) kfree_skb(skb); else consume_skb(skb); return rc; } static int qcom_smd_qrtr_probe(struct rpmsg_device *rpdev) { struct qrtr_smd_dev *qdev; int rc; qdev = devm_kzalloc(&rpdev->dev, sizeof(*qdev), GFP_KERNEL); if (!qdev) return -ENOMEM; qdev->channel = rpdev->ept; qdev->dev = &rpdev->dev; qdev->ep.xmit = qcom_smd_qrtr_send; rc = qrtr_endpoint_register(&qdev->ep, QRTR_EP_NID_AUTO); if (rc) return rc; dev_set_drvdata(&rpdev->dev, qdev); dev_dbg(&rpdev->dev, "Qualcomm SMD QRTR driver probed\n"); return 0; } static void qcom_smd_qrtr_remove(struct rpmsg_device *rpdev) { struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev); qrtr_endpoint_unregister(&qdev->ep); dev_set_drvdata(&rpdev->dev, NULL); } static const struct rpmsg_device_id qcom_smd_qrtr_smd_match[] = { { "IPCRTR" }, {} }; static struct rpmsg_driver qcom_smd_qrtr_driver = { .probe = qcom_smd_qrtr_probe, .remove = qcom_smd_qrtr_remove, .callback = qcom_smd_qrtr_callback, .id_table = qcom_smd_qrtr_smd_match, .drv = { .name = "qcom_smd_qrtr", }, }; module_rpmsg_driver(qcom_smd_qrtr_driver); MODULE_ALIAS("rpmsg:IPCRTR"); MODULE_DESCRIPTION("Qualcomm IPC-Router SMD interface driver"); MODULE_LICENSE("GPL v2");