linux-imx

/*

 *

 *  Bluetooth HCI UART driver for Intel 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 <linux/firmware.h>

#include <linux/module.h>

#include <linux/wait.h>

#include <linux/tty.h>

#include <linux/platform_device.h>

#include <linux/gpio/consumer.h>

#include <linux/acpi.h>

#include <linux/interrupt.h>

#include <linux/pm_runtime.h>

​

#include <net/bluetooth/bluetooth.h>

#include <net/bluetooth/hci_core.h>

​

#include "hci_uart.h"

#include "btintel.h"

​

#define STATE_BOOTLOADER    0

#define STATE_DOWNLOADING   1

#define STATE_FIRMWARE_LOADED   2

#define STATE_FIRMWARE_FAILED   3

#define STATE_BOOTING       4

#define STATE_LPM_ENABLED   5

#define STATE_TX_ACTIVE     6

#define STATE_SUSPENDED     7

#define STATE_LPM_TRANSACTION   8

​

#define HCI_LPM_WAKE_PKT 0xf0

#define HCI_LPM_PKT 0xf1

#define HCI_LPM_MAX_SIZE 10

#define HCI_LPM_HDR_SIZE HCI_EVENT_HDR_SIZE

​

#define LPM_OP_TX_NOTIFY 0x00

#define LPM_OP_SUSPEND_ACK 0x02

#define LPM_OP_RESUME_ACK 0x03

​

#define LPM_SUSPEND_DELAY_MS 1000

​

struct hci_lpm_pkt {

    __u8 opcode;

    __u8 dlen;

    __u8 data[0];

} __packed;

​

struct intel_device {

    struct list_head list;

    struct platform_device *pdev;

    struct gpio_desc *reset;

    struct hci_uart *hu;

    struct mutex hu_lock;

    int irq;

};

​

static LIST_HEAD(intel_device_list);

static DEFINE_MUTEX(intel_device_list_lock);

​

struct intel_data {

    struct sk_buff *rx_skb;

    struct sk_buff_head txq;

    struct work_struct busy_work;

    struct hci_uart *hu;

    unsigned long flags;

};

​

static u8 intel_convert_speed(unsigned int speed)

{

    switch (speed) {