linux-imx

/*

 *

 *  Bluetooth HCI Three-wire UART driver

 *

 *  Copyright (C) 2012  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/acpi.h>

#include <linux/errno.h>

#include <linux/gpio/consumer.h>

#include <linux/kernel.h>

#include <linux/mod_devicetable.h>

#include <linux/serdev.h>

#include <linux/skbuff.h>

​

#include <net/bluetooth/bluetooth.h>

#include <net/bluetooth/hci_core.h>

​

#include "btrtl.h"

#include "hci_uart.h"

​

#define HCI_3WIRE_ACK_PKT   0

#define HCI_3WIRE_LINK_PKT  15

​

/* Sliding window size */

#define H5_TX_WIN_MAX       4

​

#define H5_ACK_TIMEOUT  msecs_to_jiffies(250)

#define H5_SYNC_TIMEOUT msecs_to_jiffies(100)

​

/*

 * Maximum Three-wire packet:

 *     4 byte header + max value for 12-bit length + 2 bytes for CRC

 */

#define H5_MAX_LEN (4 + 0xfff + 2)

​

/* Convenience macros for reading Three-wire header values */

#define H5_HDR_SEQ(hdr)     ((hdr)[0] & 0x07)

#define H5_HDR_ACK(hdr)     (((hdr)[0] >> 3) & 0x07)

#define H5_HDR_CRC(hdr)     (((hdr)[0] >> 6) & 0x01)

#define H5_HDR_RELIABLE(hdr)    (((hdr)[0] >> 7) & 0x01)

#define H5_HDR_PKT_TYPE(hdr)    ((hdr)[1] & 0x0f)

#define H5_HDR_LEN(hdr)     ((((hdr)[1] >> 4) & 0x0f) + ((hdr)[2] << 4))

​

#define SLIP_DELIMITER  0xc0

#define SLIP_ESC    0xdb

#define SLIP_ESC_DELIM  0xdc