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https://github.com/edk2-porting/linux-next.git
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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
/*
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*
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* Bluetooth HCI UART driver for Broadcom devices
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*
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* Copyright (C) 2015 Intel Corporation
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "btbcm.h"
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#include "hci_uart.h"
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struct bcm_data {
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struct sk_buff *rx_skb;
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struct sk_buff_head txq;
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};
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static int bcm_open(struct hci_uart *hu)
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{
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struct bcm_data *bcm;
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BT_DBG("hu %p", hu);
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bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
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if (!bcm)
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return -ENOMEM;
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skb_queue_head_init(&bcm->txq);
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hu->priv = bcm;
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return 0;
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}
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static int bcm_close(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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BT_DBG("hu %p", hu);
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skb_queue_purge(&bcm->txq);
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kfree_skb(bcm->rx_skb);
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kfree(bcm);
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hu->priv = NULL;
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return 0;
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}
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static int bcm_flush(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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BT_DBG("hu %p", hu);
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skb_queue_purge(&bcm->txq);
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return 0;
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}
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static int bcm_setup(struct hci_uart *hu)
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{
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BT_DBG("hu %p", hu);
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hu->hdev->set_bdaddr = btbcm_set_bdaddr;
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return btbcm_setup_patchram(hu->hdev);
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}
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static const struct h4_recv_pkt bcm_recv_pkts[] = {
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{ H4_RECV_ACL, .recv = hci_recv_frame },
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{ H4_RECV_SCO, .recv = hci_recv_frame },
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{ H4_RECV_EVENT, .recv = hci_recv_frame },
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};
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static int bcm_recv(struct hci_uart *hu, const void *data, int count)
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{
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struct bcm_data *bcm = hu->priv;
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if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
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return -EUNATCH;
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bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
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bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
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if (IS_ERR(bcm->rx_skb)) {
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int err = PTR_ERR(bcm->rx_skb);
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BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
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return err;
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}
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return count;
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}
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static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
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{
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struct bcm_data *bcm = hu->priv;
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BT_DBG("hu %p skb %p", hu, skb);
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/* Prepend skb with frame type */
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memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
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skb_queue_tail(&bcm->txq, skb);
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return 0;
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}
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static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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return skb_dequeue(&bcm->txq);
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}
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static const struct hci_uart_proto bcm_proto = {
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.id = HCI_UART_BCM,
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.name = "BCM",
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.open = bcm_open,
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.close = bcm_close,
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.flush = bcm_flush,
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.setup = bcm_setup,
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.recv = bcm_recv,
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.enqueue = bcm_enqueue,
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.dequeue = bcm_dequeue,
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};
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int __init bcm_init(void)
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{
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return hci_uart_register_proto(&bcm_proto);
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}
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int __exit bcm_deinit(void)
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{
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return hci_uart_unregister_proto(&bcm_proto);
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}
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