mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
79b8df9362
Future H:4 based UART drivers require custom packet types and custom receive functions. To support this, extended the h4_recv_buf function with a packet definition table. For the default H:4 packets types of ACL data, SCO data and events, provide helpers to reduce the amount of code duplication. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
154 lines
3.2 KiB
C
154 lines
3.2 KiB
C
/*
|
|
*
|
|
* Bluetooth HCI UART driver for Broadcom devices
|
|
*
|
|
* Copyright (C) 2015 Intel Corporation
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <net/bluetooth/bluetooth.h>
|
|
#include <net/bluetooth/hci_core.h>
|
|
|
|
#include "btbcm.h"
|
|
#include "hci_uart.h"
|
|
|
|
struct bcm_data {
|
|
struct sk_buff *rx_skb;
|
|
struct sk_buff_head txq;
|
|
};
|
|
|
|
static int bcm_open(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm;
|
|
|
|
BT_DBG("hu %p", hu);
|
|
|
|
bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
|
|
if (!bcm)
|
|
return -ENOMEM;
|
|
|
|
skb_queue_head_init(&bcm->txq);
|
|
|
|
hu->priv = bcm;
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_close(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
BT_DBG("hu %p", hu);
|
|
|
|
skb_queue_purge(&bcm->txq);
|
|
kfree_skb(bcm->rx_skb);
|
|
kfree(bcm);
|
|
|
|
hu->priv = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_flush(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
BT_DBG("hu %p", hu);
|
|
|
|
skb_queue_purge(&bcm->txq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_setup(struct hci_uart *hu)
|
|
{
|
|
BT_DBG("hu %p", hu);
|
|
|
|
hu->hdev->set_bdaddr = btbcm_set_bdaddr;
|
|
|
|
return btbcm_setup_patchram(hu->hdev);
|
|
}
|
|
|
|
static const struct h4_recv_pkt bcm_recv_pkts[] = {
|
|
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
|
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
|
{ H4_RECV_EVENT, .recv = hci_recv_frame },
|
|
};
|
|
|
|
static int bcm_recv(struct hci_uart *hu, const void *data, int count)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
|
return -EUNATCH;
|
|
|
|
bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
|
|
bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
|
|
if (IS_ERR(bcm->rx_skb)) {
|
|
int err = PTR_ERR(bcm->rx_skb);
|
|
BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
|
|
return err;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
BT_DBG("hu %p skb %p", hu, skb);
|
|
|
|
/* Prepend skb with frame type */
|
|
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
|
|
skb_queue_tail(&bcm->txq, skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
return skb_dequeue(&bcm->txq);
|
|
}
|
|
|
|
static const struct hci_uart_proto bcm_proto = {
|
|
.id = HCI_UART_BCM,
|
|
.name = "BCM",
|
|
.open = bcm_open,
|
|
.close = bcm_close,
|
|
.flush = bcm_flush,
|
|
.setup = bcm_setup,
|
|
.recv = bcm_recv,
|
|
.enqueue = bcm_enqueue,
|
|
.dequeue = bcm_dequeue,
|
|
};
|
|
|
|
int __init bcm_init(void)
|
|
{
|
|
return hci_uart_register_proto(&bcm_proto);
|
|
}
|
|
|
|
int __exit bcm_deinit(void)
|
|
{
|
|
return hci_uart_unregister_proto(&bcm_proto);
|
|
}
|