forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
2.3 KiB
111 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright (c) 2015, Sony Mobile Communications Inc. |
|
* Copyright (c) 2013, The Linux Foundation. All rights reserved. |
|
*/ |
|
|
|
#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");
|
|
|