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/*
* 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/soc/qcom/smd.h>
#include "qrtr.h"
struct qrtr_smd_dev {
struct qrtr_endpoint ep;
struct qcom_smd_channel *channel;
};
/* from smd to qrtr */
static int qcom_smd_qrtr_callback(struct qcom_smd_device *sdev,
const void *data, size_t len)
{
struct qrtr_smd_dev *qdev = dev_get_drvdata(&sdev->dev);
int rc;
if (!qdev)
return -EAGAIN;
rc = qrtr_endpoint_post(&qdev->ep, data, len);
if (rc == -EINVAL) {
dev_err(&sdev->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 = qcom_smd_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 qcom_smd_device *sdev)
{
struct qrtr_smd_dev *qdev;
int rc;
qdev = devm_kzalloc(&sdev->dev, sizeof(*qdev), GFP_KERNEL);
if (!qdev)
return -ENOMEM;
qdev->channel = sdev->channel;
qdev->ep.xmit = qcom_smd_qrtr_send;
rc = qrtr_endpoint_register(&qdev->ep, QRTR_EP_NID_AUTO);
if (rc)
return rc;
dev_set_drvdata(&sdev->dev, qdev);
dev_dbg(&sdev->dev, "Qualcomm SMD QRTR driver probed\n");
return 0;
}
static void qcom_smd_qrtr_remove(struct qcom_smd_device *sdev)
{
struct qrtr_smd_dev *qdev = dev_get_drvdata(&sdev->dev);
qrtr_endpoint_unregister(&qdev->ep);
dev_set_drvdata(&sdev->dev, NULL);
}
static const struct qcom_smd_id qcom_smd_qrtr_smd_match[] = {
{ "IPCRTR" },
{}
};
static struct qcom_smd_driver qcom_smd_qrtr_driver = {
.probe = qcom_smd_qrtr_probe,
.remove = qcom_smd_qrtr_remove,
.callback = qcom_smd_qrtr_callback,
.smd_match_table = qcom_smd_qrtr_smd_match,
.driver = {
.name = "qcom_smd_qrtr",
.owner = THIS_MODULE,
},
};
module_qcom_smd_driver(qcom_smd_qrtr_driver);
MODULE_DESCRIPTION("Qualcomm IPC-Router SMD interface driver");
MODULE_LICENSE("GPL v2");
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