linux/drivers/bluetooth/btqcomsmd.c
Thomas Gleixner 97fb5e8d9b treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 294 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.825281744@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:37 +02:00

207 lines
4.3 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016, Linaro Ltd.
* Copyright (c) 2015, Sony Mobile Communications Inc.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/rpmsg.h>
#include <linux/of.h>
#include <linux/soc/qcom/wcnss_ctrl.h>
#include <linux/platform_device.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "btqca.h"
struct btqcomsmd {
struct hci_dev *hdev;
struct rpmsg_endpoint *acl_channel;
struct rpmsg_endpoint *cmd_channel;
};
static int btqcomsmd_recv(struct hci_dev *hdev, unsigned int type,
const void *data, size_t count)
{
struct sk_buff *skb;
/* Use GFP_ATOMIC as we're in IRQ context */
skb = bt_skb_alloc(count, GFP_ATOMIC);
if (!skb) {
hdev->stat.err_rx++;
return -ENOMEM;
}
hci_skb_pkt_type(skb) = type;
skb_put_data(skb, data, count);
return hci_recv_frame(hdev, skb);
}
static int btqcomsmd_acl_callback(struct rpmsg_device *rpdev, void *data,
int count, void *priv, u32 addr)
{
struct btqcomsmd *btq = priv;
btq->hdev->stat.byte_rx += count;
return btqcomsmd_recv(btq->hdev, HCI_ACLDATA_PKT, data, count);
}
static int btqcomsmd_cmd_callback(struct rpmsg_device *rpdev, void *data,
int count, void *priv, u32 addr)
{
struct btqcomsmd *btq = priv;
btq->hdev->stat.byte_rx += count;
return btqcomsmd_recv(btq->hdev, HCI_EVENT_PKT, data, count);
}
static int btqcomsmd_send(struct hci_dev *hdev, struct sk_buff *skb)
{
struct btqcomsmd *btq = hci_get_drvdata(hdev);
int ret;
switch (hci_skb_pkt_type(skb)) {
case HCI_ACLDATA_PKT:
ret = rpmsg_send(btq->acl_channel, skb->data, skb->len);
if (ret) {
hdev->stat.err_tx++;
break;
}
hdev->stat.acl_tx++;
hdev->stat.byte_tx += skb->len;
break;
case HCI_COMMAND_PKT:
ret = rpmsg_send(btq->cmd_channel, skb->data, skb->len);
if (ret) {
hdev->stat.err_tx++;
break;
}
hdev->stat.cmd_tx++;
hdev->stat.byte_tx += skb->len;
break;
default:
ret = -EILSEQ;
break;
}
if (!ret)
kfree_skb(skb);
return ret;
}
static int btqcomsmd_open(struct hci_dev *hdev)
{
return 0;
}
static int btqcomsmd_close(struct hci_dev *hdev)
{
return 0;
}
static int btqcomsmd_setup(struct hci_dev *hdev)
{
struct sk_buff *skb;
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
kfree_skb(skb);
/* Devices do not have persistent storage for BD address. Retrieve
* it from the firmware node property.
*/
set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
return 0;
}
static int btqcomsmd_probe(struct platform_device *pdev)
{
struct btqcomsmd *btq;
struct hci_dev *hdev;
void *wcnss;
int ret;
btq = devm_kzalloc(&pdev->dev, sizeof(*btq), GFP_KERNEL);
if (!btq)
return -ENOMEM;
wcnss = dev_get_drvdata(pdev->dev.parent);
btq->acl_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_ACL",
btqcomsmd_acl_callback, btq);
if (IS_ERR(btq->acl_channel))
return PTR_ERR(btq->acl_channel);
btq->cmd_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_CMD",
btqcomsmd_cmd_callback, btq);
if (IS_ERR(btq->cmd_channel))
return PTR_ERR(btq->cmd_channel);
hdev = hci_alloc_dev();
if (!hdev)
return -ENOMEM;
hci_set_drvdata(hdev, btq);
btq->hdev = hdev;
SET_HCIDEV_DEV(hdev, &pdev->dev);
hdev->bus = HCI_SMD;
hdev->open = btqcomsmd_open;
hdev->close = btqcomsmd_close;
hdev->send = btqcomsmd_send;
hdev->setup = btqcomsmd_setup;
hdev->set_bdaddr = qca_set_bdaddr_rome;
ret = hci_register_dev(hdev);
if (ret < 0) {
hci_free_dev(hdev);
return ret;
}
platform_set_drvdata(pdev, btq);
return 0;
}
static int btqcomsmd_remove(struct platform_device *pdev)
{
struct btqcomsmd *btq = platform_get_drvdata(pdev);
hci_unregister_dev(btq->hdev);
hci_free_dev(btq->hdev);
rpmsg_destroy_ept(btq->cmd_channel);
rpmsg_destroy_ept(btq->acl_channel);
return 0;
}
static const struct of_device_id btqcomsmd_of_match[] = {
{ .compatible = "qcom,wcnss-bt", },
{ },
};
MODULE_DEVICE_TABLE(of, btqcomsmd_of_match);
static struct platform_driver btqcomsmd_driver = {
.probe = btqcomsmd_probe,
.remove = btqcomsmd_remove,
.driver = {
.name = "btqcomsmd",
.of_match_table = btqcomsmd_of_match,
},
};
module_platform_driver(btqcomsmd_driver);
MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
MODULE_DESCRIPTION("Qualcomm SMD HCI driver");
MODULE_LICENSE("GPL v2");