Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / bluetooth / hci_bcm.c

diff --git a/kernel/drivers/bluetooth/hci_bcm.c b/kernel/drivers/bluetooth/hci_bcm.c
new file mode 100644 (file)
index 0000000..1ec0b4a
--- /dev/null
+++ b/kernel/drivers/bluetooth/hci_bcm.c
@@ -0,0 +1,153 @@
+/*
+ *
+ *  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);
+}