/*********************************************************************************



Copyright(c) 2005 Analog Devices, Inc. All Rights Reserved. 



This software is proprietary and confidential.  By using this software you agree

to the terms of the associated Analog Devices License Agreement.  



Description:

			 Configures the Power Management and EBIU modules for the 

			 ADSP-BF537 EZ-KIT LITE.

			 

*********************************************************************************/



#include "PowerDemo.h"



static void InitPower(void);

static void InitSDRAM(void);



/*********************************************************************



	Function:		Init



	Description:	Performs Processor specific initialization



*********************************************************************/

void Init(void)

{

	// Initialize the EBIU module (SDRAM)

	InitSDRAM();

	

	// Initialize the power management module

	InitPower();	

}



/*********************************************************************



	Function:		InitPower



	Description:	Initializes the Power Management module and sets 

				    the power settings for 0.85V



*********************************************************************/

static void InitPower(void)

{

	ADI_PWR_RESULT 	PWRResult;

	

	// The following command table describes the configuration for the ADSP-BF537 EZ-KIT.

	// All commands (except ADI_PWR_CMD_END) are equivalent to the single command 

	//		{ ADI_PWR_CMD_SET_EZKIT, (void*)ADI_PWR_EZKIT_BF537_600MHZ }

	//

	ADI_PWR_COMMAND_PAIR ezkit_power[] = {	

		{ ADI_PWR_CMD_SET_PROC_VARIANT, (void*)ADI_PWR_PROC_BF537SKBC1600 },	// Processor variant

		{ ADI_PWR_CMD_SET_PACKAGE,      (void*)ADI_PWR_PACKAGE_MBGA       },   // Packaging type of processor

		{ ADI_PWR_CMD_SET_VDDEXT,       (void*)ADI_PWR_VDDEXT_330         },	// External voltage supply (3.3V)

		{ ADI_PWR_CMD_SET_CLKIN,        (void*)25 /* MHz */               },   // 25Mhz oscillator connected to CLKIN

		{ ADI_PWR_CMD_END, (void*)0}											// No more commands

	};	

	//

	// All commands (except ADI_PWR_CMD_END) are equivalent to the single command 

	//		{ ADI_PWR_CMD_SET_EZKIT, (void*)ADI_PWR_EZKIT_BF537_600MHZ }

	

	// Pass the above table to the Intialization routine

	

	PWRResult = adi_pwr_Init( ezkit_power );

	if ((PWRResult != ADI_PWR_RESULT_SUCCESS) && (PWRResult != ADI_PWR_RESULT_CALL_IGNORED)) {

		ezErrorCheck(1);

	}



	// set the processor to give the fastest clock frequencies for the

	// lowest voltage level.

	

	adi_pwr_SetMaxFreqForVolt( ADI_PWR_VLEV_085 );

	

}



////////////////////////////////////////////////////////////////////////////

// variables required to configure the timing specifications for the 

// Micron MT48LC32M8A2-75 memory modules

//

static ADI_EBIU_TIMING_VALUE sdram_refresh = { 											// SDRAM Refresh rate: 

												8192, 									// 8192 cycles

												{ 64, ADI_EBIU_TIMING_UNIT_MILLISEC	} 	// 64 milliseconds

};



static ADI_EBIU_SDRAM_BANK_VALUE bank_size =  {0, ADI_EBIU_SDRAM_BANK_64MB};			// 64MB 



// cast to first union member is used to avoid warning message from compiler

static ADI_EBIU_SDRAM_BANK_VALUE bank_caw = {0, (ADI_EBIU_SDRAM_BANK_SIZE)ADI_EBIU_SDRAM_BANK_COL_10BIT}; // 10 bit column addess width



static ADI_EBIU_TIME ebiu_44_nanosecs = {44, ADI_EBIU_TIMING_UNIT_NANOSEC};				// 44 nanoseconds

static ADI_EBIU_TIME ebiu_20_nanosecs = {20, ADI_EBIU_TIMING_UNIT_NANOSEC};				// 20 nanoseconds

static ADI_EBIU_TIMING_VALUE twr_min = { 												// Minimum TWR value

												1, 										// 1 cycle

												{7500, ADI_EBIU_TIMING_UNIT_PICOSEC} 	// 7.5 nanoseconds

};



#define DO_NOT_CHANGE_MMR_SETTINGS 0



/*********************************************************************



	Function:		InitSDRAM



	Description:	Initializes the EBIU module with the required SDRAM 

				    settings.



*********************************************************************/

static void InitSDRAM(void)

{

	ADI_EBIU_RESULT EBIUResult;

	

	// The following command table describes the configuration for the ADSP-BF537 EZ-KIT, 

	// which uses two Micron MT48LC32M8A2-75 (8Meg x 8 x 4 banks) memory modules to give

	// a total of 64MB.

	//

	// This is the most general specification, as the values can be set according to the 

	// datasheet of the memory modules to be configured.

	//

	ADI_EBIU_COMMAND_PAIR ezkit_sdram[] = {	

		{ ADI_EBIU_CMD_SET_SDRAM_BANK_SIZE,		(void*)&bank_size     		},

		{ ADI_EBIU_CMD_SET_SDRAM_BANK_COL_WIDTH,(void*)&bank_caw    		}, 

		{ ADI_EBIU_CMD_SET_SDRAM_CL_THRESHOLD,	(void*)100      		},

		{ ADI_EBIU_CMD_SET_SDRAM_TRASMIN,		(void*)&ebiu_44_nanosecs   	},

		{ ADI_EBIU_CMD_SET_SDRAM_TRPMIN,		(void*)&ebiu_20_nanosecs   	},

		{ ADI_EBIU_CMD_SET_SDRAM_TRCDMIN,		(void*)&ebiu_20_nanosecs   	},

		{ ADI_EBIU_CMD_SET_SDRAM_TWRMIN,		(void*)&twr_min 	        },

		{ ADI_EBIU_CMD_SET_SDRAM_REFRESH,		(void*)&sdram_refresh 		},

		// The next command disables Fast back to back read/write sequences

		// which is safe for all systems

		{ ADI_EBIU_CMD_SET_SDRAM_FBBRW, 		(void*)0					},

		{ ADI_EBIU_CMD_END, 0}

	};

	// 

	// If a Micron memory module is used. the following commands will suffice

	//		{ ADI_EBIU_CMD_SET_SDRAM_BANK_SIZE,		(void*)&bank_size                            },

	//		{ ADI_EBIU_CMD_SET_SDRAM_MODULE, 		(void*)ADI_EBIU_SDRAM_MODULE_MT48LC32M8A2_75 },

	//		{ ADI_EBIU_CMD_END, 0}

	//

	// Finally, when the BF537 EZ-KIT is to be used the above can be replaced by

	//		{ ADI_EBIU_CMD_SET_EZKIT, (void*)ADI_EBIU_EZKIT_BF537 }

	//		{ ADI_EBIU_CMD_END, 0}

	//

	// when the .

	//

	

	

	// Pass the above table to the Intialization routine

	

	EBIUResult = adi_ebiu_Init( ezkit_sdram, DO_NOT_CHANGE_MMR_SETTINGS );

	if ((EBIUResult != ADI_EBIU_RESULT_SUCCESS) && (EBIUResult != ADI_EBIU_RESULT_CALL_IGNORED)) {

		ezErrorCheck(1);

	}

}