 /*
  * Mediatek Bluetooth driver: global definitions & declarations
  *
  * Copyright (C) 2015, Mediatek International Ltd.
  *
  * This software file (the "File") is distributed by Mediatek International
  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  * (the "License").  You may use, redistribute and/or modify this File in
  * accordance with the terms and conditions of the License, a copy of which
  * is available by writing to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  *
  *
  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  * this warranty disclaimer.
  *
  */

 #include <linux/kthread.h>
 #include <linux/bitops.h>
 #include <linux/slab.h>
 #include <net/bluetooth/bluetooth.h>

 #define SAVE_FW_DUMP_IN_KERNEL	1

 #define SUPPORT_FW_DUMP		1
 #define BTM_HEADER_LEN                  5
 #define BTM_UPLD_SIZE                   2312

 #define MTK_TXDATA_SIZE 2000
 #define MTK_RXDATA_SIZE 2000

 /* Time to wait until Host Sleep state change in millisecond */
 #define WAIT_UNTIL_HS_STATE_CHANGED     msecs_to_jiffies(5000)
 /* Time to wait for command response in millisecond */
 #define WAIT_UNTIL_CMD_RESP             msecs_to_jiffies(5000)

 enum rdwr_status {
         RDWR_STATUS_SUCCESS = 0,
         RDWR_STATUS_FAILURE = 1,
         RDWR_STATUS_DONE = 2
 };

 #define FW_DUMP_MAX_NAME_LEN    8
 #define FW_DUMP_HOST_READY      0xEE
 #define FW_DUMP_DONE            0xFF
 #define FW_DUMP_READ_DONE       0xFE

 struct memory_type_mapping {
         u8 mem_name[FW_DUMP_MAX_NAME_LEN];
         u8 *mem_ptr;
         u32 mem_size;
         u8 done_flag;
 };

 struct btmtk_thread {
         struct task_struct *task;
         wait_queue_head_t wait_q;
         void *priv;
 };

 struct btmtk_device {
         void *card;
         //struct hci_dev *hcidev;

         u8 dev_type;

         u8 tx_dnld_rdy;

         u8 psmode;
         u8 pscmd;
         u8 hsmode;
         u8 hscmd;

         /* Low byte is gap, high byte is GPIO */
         u16 gpio_gap;

         u8 hscfgcmd;
         u8 sendcmdflag;
 };

 struct btmtk_adapter {
         void *hw_regs_buf;
         u8 *hw_regs;
         u32 int_count;
         struct sk_buff_head tx_queue;
         struct sk_buff_head fops_queue;
         u8 fops_mode;
         u8 psmode;
         u8 ps_state;
         u8 hs_state;
         u8 wakeup_tries;
         wait_queue_head_t cmd_wait_q;
         wait_queue_head_t event_hs_wait_q;
         u8 cmd_complete;
         bool is_suspended;
 };

 struct btmtk_private {
         struct btmtk_device btmtk_dev;
         struct btmtk_adapter *adapter;
         struct btmtk_thread main_thread;
         int (*hw_host_to_card)(struct btmtk_private *priv,
                                 u8 *payload, u16 nb);

         int (*hw_set_own_back)(int owntype);
         int (*hw_process_int_status)(struct btmtk_private *priv);
         void (*firmware_dump)(struct btmtk_private *priv);
         spinlock_t driver_lock;         /* spinlock used by driver */
 #ifdef CONFIG_DEBUG_FS
         void *debugfs_data;
 #endif
         bool surprise_removed;
#if SUPPORT_FW_DUMP
		 struct semaphore fw_dump_semaphore;
		 struct task_struct *fw_dump_tsk;
		 struct task_struct *fw_dump_end_check_tsk;
#endif
 };

 #define MTK_VENDOR_PKT                 0xFE

 /* Vendor specific Bluetooth commands */
 #define BT_CMD_PSCAN_WIN_REPORT_ENABLE  0xFC03
 #define BT_CMD_ROUTE_SCO_TO_HOST        0xFC1D
 #define BT_CMD_SET_BDADDR               0xFC22
 #define BT_CMD_AUTO_SLEEP_MODE          0xFC23
 #define BT_CMD_HOST_SLEEP_CONFIG        0xFC59
 #define BT_CMD_HOST_SLEEP_ENABLE        0xFC5A
 #define BT_CMD_MODULE_CFG_REQ           0xFC5B
 #define BT_CMD_LOAD_CONFIG_DATA         0xFC61

 /* Sub-commands: Module Bringup/Shutdown Request/Response */
 #define MODULE_BRINGUP_REQ              0xF1
 #define MODULE_BROUGHT_UP               0x00
 #define MODULE_ALREADY_UP               0x0C

 #define MODULE_SHUTDOWN_REQ             0xF2

 /* Vendor specific Bluetooth events */
 #define BT_EVENT_AUTO_SLEEP_MODE        0x23
 #define BT_EVENT_HOST_SLEEP_CONFIG      0x59
 #define BT_EVENT_HOST_SLEEP_ENABLE      0x5A
 #define BT_EVENT_MODULE_CFG_REQ         0x5B
 #define BT_EVENT_POWER_STATE            0x20

 /* Bluetooth Power States */
 #define BT_PS_ENABLE                    0x02
 #define BT_PS_DISABLE                   0x03
 #define BT_PS_SLEEP                     0x01

 /* Host Sleep states */
 #define HS_ACTIVATED                    0x01
 #define HS_DEACTIVATED                  0x00

 /* Power Save modes */
 #define PS_SLEEP                        0x01
 #define PS_AWAKE                        0x00

 #define BT_CAL_HDR_LEN                  4
 #define BT_CAL_DATA_SIZE                28


 #define FW_DUMP_BUF_SIZE (1024*512)

 #define FW_DUMP_FILE_NAME_SIZE     64

 //#define SAVE_FW_DUMP_IN_KERNEL     1

/* stpbt device node */
#define BT_NODE "stpbt"
#define BT_DRIVER_NAME "BT_chrdev"

 struct btmtk_event {
         u8 ec;          /* event counter */
         u8 length;
         u8 data[4];
 } __packed;

 /* Prototype of global function */

 struct btmtk_private *btmtk_add_card(void *card);
 int btmtk_remove_card(struct btmtk_private *priv);

 void btmtk_interrupt(struct btmtk_private *priv);

 bool btmtk_check_evtpkt(struct btmtk_private *priv, struct sk_buff *skb);
 int btmtk_process_event(struct btmtk_private *priv, struct sk_buff *skb);

 int btmtk_send_module_cfg_cmd(struct btmtk_private *priv, u8 subcmd);
 int btmtk_pscan_window_reporting(struct btmtk_private *priv, u8 subcmd);
 int btmtk_send_hscfg_cmd(struct btmtk_private *priv);
 int btmtk_enable_ps(struct btmtk_private *priv);
 int btmtk_prepare_command(struct btmtk_private *priv);
 int btmtk_enable_hs(struct btmtk_private *priv);
 void btmtk_firmware_dump(struct btmtk_private *priv);


#define META_BUFFER_SIZE (1024*50)

typedef struct _OSAL_UNSLEEPABLE_LOCK_ {
	spinlock_t lock;
	unsigned long flag;
} OSAL_UNSLEEPABLE_LOCK, *P_OSAL_UNSLEEPABLE_LOCK;

typedef struct {
	OSAL_UNSLEEPABLE_LOCK spin_lock;
	u8 buffer[META_BUFFER_SIZE];	/* MTKSTP_BUFFER_SIZE:1024 */
	u32 read_p;		/* indicate the current read index */
	u32 write_p;		/* indicate the current write index */
} ring_buffer_struct;

 #ifdef CONFIG_DEBUG_FS

#define FIXED_STPBT_MAJOR_DEV_ID 111


#define FW_DUMP_FILE_NAME "/tmp/log"
#define FW_DUMP_END_EVENT "coredump end"

#define BTMTK_LOG_LEVEL_ERROR       1
#define BTMTK_LOG_LEVEL_WARNING     2
#define BTMTK_LOG_LEVEL_INFO        3
#define BTMTK_LOG_LEVEL_DEBUG       4

#define BTMTK_LOG_LEVEL_DEFAULT      BTMTK_LOG_LEVEL_INFO  /* default setting */
extern u8 btmtk_log_lvl;

#define BTMTK_ERR(fmt, ...)     \
    do {if (btmtk_log_lvl >= BTMTK_LOG_LEVEL_ERROR) pr_warn("btmtk_err: "fmt"\n", ##__VA_ARGS__); } while (0)
#define BTMTK_WARN(fmt, ...)    \
    do {if (btmtk_log_lvl >= BTMTK_LOG_LEVEL_WARNING) pr_warn("btmtk_warn: "fmt"\n", ##__VA_ARGS__); } while (0)
#define BTMTK_INFO(fmt, ...)    \
    do {if (btmtk_log_lvl >= BTMTK_LOG_LEVEL_INFO) pr_warn("btmtk_info: "fmt"\n", ##__VA_ARGS__); } while (0)
#define BTMTK_DBG(fmt, ...)     \
    do {if (btmtk_log_lvl >= BTMTK_LOG_LEVEL_DEBUG) pr_warn("btmtk_debug: "fmt"\n", ##__VA_ARGS__); } while (0)


#endif