/*****************************************************************************
*  Copyright Statement:
*  --------------------
*  This software is protected by Copyright and the information contained
*  herein is confidential. The software may not be copied and the information
*  contained herein may not be used or disclosed except with the written
*  permission of MediaTek Inc. (C) 2001
*
*****************************************************************************/

/*****************************************************************************
 *
 * Filename:
 * ---------
 *   us_timer.h
 *
 * Project:
 * --------
 *   MAUI
 *
 * Description:
 * ------------
 *   Header file for providing timer of microsecond precision.
 *
 * Author:
 * -------
 * -------
 *
 *============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *------------------------------------------------------------------------------
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *------------------------------------------------------------------------------
 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *============================================================================
 ****************************************************************************/

#if !defined(__US_TIMER_H__)
#define __US_TIMER_H__

#if defined(MT6268) || defined(MT6270A) || defined(MT6276) || defined(MT6573) || defined(MT6575) || defined(MT6250) || defined(MT6260) || defined(MT6261) || defined(MT2501) || defined(MT2502)
#define __HW_US_TIMER_SUPPORT__
#endif

#include "reg_base.h"
//For L1 simulation
#include "l1_interface.h"

/*******************************************************************************
 * Define registers.
 *******************************************************************************/
#if defined(MT6268)
#define __ALIGN_2G_CLOCK__
#define USCNT_CON          (volatile kal_uint16 *)(CONFIG_base+0x5000)
#define F32K_FM            (volatile kal_uint32 *)(CONFIG_base+0x5004)
#define USCNTI_VAL         (volatile kal_uint32 *)(CONFIG_base+0x5008)
#define USCNTF_VAL         (volatile kal_uint32 *)(CONFIG_base+0x500C)
#define USCNT_FREQ         3250000
#define USCNT_TO_FRAME(us) ((us)/15000)
#define FRAME_TO_USCNT(fr) ((fr)*15000)
#define USCNT_TO_QBIT(us)  ((us)/3)       /*Error rate: 0, allowd max log duration: 82s */
#define USCNT_WRAP         0x0FFFFFFF
#define USCNT_START_CODE   0x6269
#define USCNT_STOP_CODE    0x6268
#elif defined(MT6270A) || defined(MT6276) || defined(MT6573) || defined(MT6575) || defined(MT6250) || defined(MT6260) || defined(MT6261) || defined(MT2501) || defined(MT2502)
#if defined (MT6250) || defined(MT6260) || defined(MT6261) || defined(MT2501) || defined(MT2502)
#define TOPSM_base          MCU_TOPSM_base
#endif
#define USCNT_CON          (volatile kal_uint32 *)(TOPSM_base+0x0080)
#define F32K_FM            (volatile kal_uint32 *)(TOPSM_base+0x0084)
#define USCNTI_VAL         (volatile kal_uint32 *)(TOPSM_base+0x0088)
#define USCNT_FREQ         1000000
#define USCNT_TO_FRAME(sus) (((sus)*58161)>>28) /* Error rate: 0.0000266% */
#define USCNT_TO_QBIT(us)  (((us)*1109)>>10)  /*Error rate: 1 qbit error per 3000 qbits, allowd max log duration: 4s */
#define USCNT_WRAP         0xFFFFFFFF

#if defined(MT6270A) || defined(MT6276)
#define USCNT_START_CODE   0x62760001
#define USCNT_STOP_CODE    0x62760000
#elif defined(MT6573)
#define USCNT_START_CODE   0x65730001
#define USCNT_STOP_CODE    0x65730000
#elif defined(MT6575)
#define USCNT_START_CODE   0x65750001
#define USCNT_STOP_CODE    0x65750000
#else //afterward, (0x1153<<16) is the default key, instead of chip-specified key.
#define USCNT_START_CODE   ((0x1153<<16) | 0x01)
#define USCNT_STOP_CODE    (0x1153<<16)
#endif

#endif

#define US_TD_Timer        (volatile kal_uint16 *)(TDMA_base + 0x00)
#define US_TD_Wrape        (volatile kal_uint16 *)(TDMA_base + 0x04)


/*******************************************************************************
 * Define macros.
 *******************************************************************************/
#if defined(__HW_US_TIMER_SUPPORT__)
extern void USC_Start( void );
extern void USC_Stop( void );
extern void USC_Cal_32KFM( kal_uint32 Cal_32K, kal_uint32 Cal_26M);
extern kal_uint32 USC_Get_TimeStamp( void );
extern kal_uint32 USC_Get_TimeStamp_CNT( void);
//AB: software workaround for us counter hw issue during waking up
#if defined(MT6268_S00)
extern unsigned int USC_Get_Int(void);
#define ust_get_current_time() USC_Get_Int()
#else
#define ust_get_current_time() HW_READ(USCNTI_VAL)
#endif
#define ust_get_duration(prev, cur)  USCNT_TO_QBIT((((cur) >= (prev))? (((cur) - (prev))): ((USCNT_WRAP - (prev) + (cur)))))

#else   /* __HW_US_TIMER_SUPPORT__ */

/*
 * There is no HW support.
 * Use TDMA TQCNT to approximate it.
 */
#define ust_get_current_time() HW_READ(US_TD_Timer)
#define ust_get_duration(prev, cur) (((cur) >= (prev))? ((cur) - (prev)): ((HW_READ(US_TD_Wrape)) - (prev) + (cur)))

#endif  /* __HW_US_TIMER_SUPPORT__ */

/**
 * ust_busy_wait - a busy loop wait for a period
 * @us: microseconds to wait
 *
 * This macro contains a busy loop to wait a period of specified microsends.
 * There is a maximal iteration count in the busy loop to prevent from infinite loop. 
 * (EX: timer is not working.)
 */
#define ust_busy_wait(us)   \
        do {    \
            kal_uint32 t1, t2, zerocount = 0xffff;\
            if ((us) == 0) {    \
                break;  \
            }   \
            t1 = ust_get_current_time();    \
            do {    \
                t2 = ust_get_current_time();    \
                if (t1 == t2) { zerocount--; }  \
                else if (ust_get_duration(t1, t2) >= (us)) { break; } \
	       	else { continue; }   \
            } while (zerocount);    \
        } while (0)


#endif  /* !__US_TIMER_H__ */