[deliverable/linux.git] / drivers / bluetooth / hci_bcm.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);
}
Commit	Line	Data
e9a2dd26 MH	1	/*
	2	*
	3	* Bluetooth HCI UART driver for Broadcom devices
	4	*
	5	* Copyright (C) 2015 Intel Corporation
	6	*
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	*/
	23
	24	#include <linux/kernel.h>
	25	#include <linux/errno.h>
	26	#include <linux/skbuff.h>
	27
	28	#include <net/bluetooth/bluetooth.h>
	29	#include <net/bluetooth/hci_core.h>
	30
bdd8818e	31	#include "btbcm.h"
e9a2dd26	32	#include "hci_uart.h"
bdd8818e MH	33
	34	struct bcm_data {
	35	struct sk_buff *rx_skb;
	36	struct sk_buff_head txq;
	37	};
	38
	39	static int bcm_open(struct hci_uart *hu)
	40	{
	41	struct bcm_data *bcm;
	42
	43	BT_DBG("hu %p", hu);
	44
	45	bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
	46	if (!bcm)
	47	return -ENOMEM;
	48
	49	skb_queue_head_init(&bcm->txq);
	50
	51	hu->priv = bcm;
	52	return 0;
	53	}
	54
	55	static int bcm_close(struct hci_uart *hu)
	56	{
	57	struct bcm_data *bcm = hu->priv;
	58
	59	BT_DBG("hu %p", hu);
	60
	61	skb_queue_purge(&bcm->txq);
	62	kfree_skb(bcm->rx_skb);
	63	kfree(bcm);
	64
	65	hu->priv = NULL;
	66	return 0;
	67	}
	68
	69	static int bcm_flush(struct hci_uart *hu)
	70	{
	71	struct bcm_data *bcm = hu->priv;
	72
	73	BT_DBG("hu %p", hu);
	74
	75	skb_queue_purge(&bcm->txq);
	76
	77	return 0;
	78	}
	79
	80	static int bcm_setup(struct hci_uart *hu)
	81	{
	82	BT_DBG("hu %p", hu);
	83
	84	hu->hdev->set_bdaddr = btbcm_set_bdaddr;
	85
	86	return btbcm_setup_patchram(hu->hdev);
	87	}
	88
79b8df93 MH	89	static const struct h4_recv_pkt bcm_recv_pkts[] = {
	90	{ H4_RECV_ACL, .recv = hci_recv_frame },
	91	{ H4_RECV_SCO, .recv = hci_recv_frame },
	92	{ H4_RECV_EVENT, .recv = hci_recv_frame },
	93	};
	94
bdd8818e MH	95	static int bcm_recv(struct hci_uart hu, const void data, int count)
	96	{
	97	struct bcm_data *bcm = hu->priv;
	98
	99	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
	100	return -EUNATCH;
	101
79b8df93 MH	102	bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
79b8df93 MH	103	bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
bdd8818e MH	104	if (IS_ERR(bcm->rx_skb)) {
	105	int err = PTR_ERR(bcm->rx_skb);
	106	BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
	107	return err;
	108	}
	109
	110	return count;
	111	}
	112
	113	static int bcm_enqueue(struct hci_uart hu, struct sk_buff skb)
	114	{
	115	struct bcm_data *bcm = hu->priv;
	116
	117	BT_DBG("hu %p skb %p", hu, skb);
	118
	119	/* Prepend skb with frame type */
	120	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
	121	skb_queue_tail(&bcm->txq, skb);
	122
	123	return 0;
	124	}
	125
	126	static struct sk_buff bcm_dequeue(struct hci_uart hu)
	127	{
	128	struct bcm_data *bcm = hu->priv;
	129
	130	return skb_dequeue(&bcm->txq);
	131	}
	132
	133	static const struct hci_uart_proto bcm_proto = {
	134	.id = HCI_UART_BCM,
	135	.name = "BCM",
	136	.open = bcm_open,
	137	.close = bcm_close,
	138	.flush = bcm_flush,
	139	.setup = bcm_setup,
	140	.recv = bcm_recv,
	141	.enqueue = bcm_enqueue,
	142	.dequeue = bcm_dequeue,
	143	};
	144
	145	int __init bcm_init(void)
	146	{
	147	return hci_uart_register_proto(&bcm_proto);
	148	}
	149
	150	int __exit bcm_deinit(void)
	151	{
	152	return hci_uart_unregister_proto(&bcm_proto);
	153	}