pll.c
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/*****************************************************************************
* 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) 2005
*
* BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
* NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
* SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
* BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
* LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
* THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
* WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
* LAWS PRINCIPLES. ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
* RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
* THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
*
*****************************************************************************/
/*****************************************************************************
*
* Filename:
* ---------
* pll.c
*
* Project:
* --------
* Maui_Software
*
* Description:
* ------------
* This Module defines the HW initialization.
*
* Author:
* -------
* -------
*
*============================================================================
* HISTORY
* Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
*------------------------------------------------------------------------------
*------------------------------------------------------------------------------
* Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
*============================================================================
****************************************************************************/
/*******************************************************************************
* Include header files
*******************************************************************************/
#if !defined(bool)
#define bool int
typedef int bool_t;
#define FALSE (1==0)
#define TRUE (!FALSE)
#endif
#if !defined(U32)
#define U32 unsigned int
typedef int U32_t;
#endif
////////////////////////////////////////////////////////////////////////////////
// GPT
////////////////////////////////////////////////////////////////////////////////
#if !defined (GPT_base)
#define GPT_base (0xA00C0000) /*General Purpose Timer */
#endif
#define GPT4_CON ((volatile unsigned int *)(GPT_base + 0x28))
#define GPT4_DAT ((volatile unsigned int *)(GPT_base + 0x2C))
#define GPT4_EN (1<<0)
#define GPT4_LOCK (1<<1)
#define GPT4_MAX_TICK_CNT ((U32)0xFFFFFFFF)
// 26MHz setting
#define GPT4_MAX_US_TIMEOUT ((U32)164926744) // 0xFFFFFFFF * 38.4ns / 1000
#define GPT4_1US_TICK ((U32)26) // 1000 / 38.4ns = 26.042
// 26MHz: 1us = 26.042 ticks
#define TIME_TO_TICK_US(us) ((us)*GPT4_1US_TICK + ((us)*42 + (1000-1))/1000)
void gpt4_busy_wait_us(U32 timeout_us);
#define GPT4_STOP() do { *GPT4_CON = 0; } while(0)
#define GPT4_INIT() \
do { \
/* default power on GPT */ \
\
/* // clear GPT4 first */ \
*GPT4_CON = 0; \
\
/* // enable GPT4 without lock */ \
*GPT4_CON |= (GPT4_EN); \
} while(0)
#define GPT4_GET_CURRENT_TICK() (*GPT4_DAT)
#ifdef __MTK_TARGET__
#pragma arm section code = "EMIINITCODE"
#endif /* __MTK_TARGET__ */
void gpt4_busy_wait_us(U32 timeout_us)
{
U32 start_tick, timeout_tick;
register U32 cur_tick;
register U32 elapse_tick;
GPT4_INIT();
// get timeout tick
timeout_tick = TIME_TO_TICK_US(timeout_us);
start_tick = GPT4_GET_CURRENT_TICK();
// wait for timeout
do {
// get current tick
cur_tick = GPT4_GET_CURRENT_TICK();
// check elapse time
if( start_tick <= cur_tick ) {
elapse_tick = cur_tick - start_tick;
}
else {
elapse_tick = (GPT4_MAX_TICK_CNT-start_tick) + cur_tick;
}
// check if timeout
} while ( timeout_tick > elapse_tick );
}
#ifdef __MTK_TARGET__
#pragma arm section code
#endif /* __MTK_TARGET__ */
#if defined (MT6250) || defined (MT6260)
#include "./mt6250_mt6260_pll.c"
#elif defined(MT6261)
#include "./mt6261_pll.c"
#else
#error "pll driver not yet implemented !! \n"
#endif