654 lines
29 KiB
C
654 lines
29 KiB
C
/************************************************************************************//**
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* \file Demo\ARM7_LPC2000_Olimex_LPC_L2294_GCC\Boot\extflash.c
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* \brief Bootloader external flash driver source file.
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* \ingroup Boot_ARM7_LPC2000_Olimex_LPC_L2294_GCC
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* \internal
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*----------------------------------------------------------------------------------------
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* C O P Y R I G H T
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*----------------------------------------------------------------------------------------
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* Copyright (c) 2011 by Feaser http://www.feaser.com All rights reserved
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*
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*----------------------------------------------------------------------------------------
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* L I C E N S E
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*----------------------------------------------------------------------------------------
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* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You have received a copy of the GNU General Public License along with OpenBLT. It
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* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
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*
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* \endinternal
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****************************************************************************************/
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/****************************************************************************************
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* Include files
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****************************************************************************************/
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#include "boot.h" /* bootloader generic header */
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#if (BOOT_NVM_HOOKS_ENABLE > 0)
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/****************************************************************************************
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* Macro definitions
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****************************************************************************************/
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/** \brief Value for an invalid flash sector. */
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#define FLASH_INVALID_SECTOR (0xff)
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/** \brief Value for an invalid flash address. */
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#define FLASH_INVALID_ADDRESS (0xffffffff)
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/** \brief Standard size of a flash block for writing. */
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#define FLASH_WRITE_BLOCK_SIZE (512)
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/** \brief Total numbers of sectors in array flashLayout[]. */
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#define FLASH_TOTAL_SECTORS (sizeof(flashLayout)/sizeof(flashLayout[0]))
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/** \brief C3 Intel flash read array command. */
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#define FLASH_CMD_READ_ARRAY_MODE (0xFF)
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/** \brief C3 Intel flash read id command. */
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#define FLASH_CMD_READ_ID_MODE (0x90)
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/** \brief C3 Intel flash erase command. */
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#define FLASH_CMD_ERASE_MODE (0x20)
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/** \brief C3 Intel flash read status command. */
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#define FLASH_CMD_READ_STATUS_MODE (0x70)
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/** \brief C3 Intel flash change lock command. */
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#define FLASH_CMD_CHANGE_LOCK_MODE (0x60)
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/** \brief C3 Intel flash unlock sector command. */
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#define FLASH_CMD_UNLOCK_SECTOR (0xD0)
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/** \brief C3 Intel flash lock sector command. */
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#define FLASH_CMD_LOCK_SECTOR (0x01)
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/** \brief C3 Intel flash program command. */
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#define FLASH_CMD_PROGRAM_MODE (0x40)
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/** \brief C3 Intel flash erase confirm command. */
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#define FLASH_CMD_ERASE_CONFIRM (0xD0)
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/** \brief C3 Intel flash clear status command. */
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#define FLASH_CMD_CLEAR_STATUS (0x50)
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/** \brief C3 Intel flash lock bit. */
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#define FLASH_LOCK_BIT (0x01)
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/** \brief C3 Intel flash status ready bit. */
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#define FLASH_STATUS_READY_BIT (0x80)
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/** \brief C3 Intel flash locked error code. */
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#define FLASH_ERR_LOCKED (0x02)
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/** \brief C3 Intel flash Vpp range error code. */
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#define FLASH_ERR_VPP_RANGE (0x08)
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/** \brief C3 Intel flash program error code. */
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#define FLASH_ERR_PROGRAM (0x10)
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/** \brief C3 Intel flash command sequence error code. */
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#define FLASH_ERR_CMD_SEQ (0x10)
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/** \brief C3 Intel flash erase error code. */
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#define FLASH_ERR_ERASE (0x20)
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/** \brief Flash erase timeout value. */
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#define FLASH_ERASE_TIMEOUT ((blt_int32u)5000000)
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/** \brief Flash program timeout value. */
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#define FLASH_PROGRAM_TIMEOUT ((blt_int32u)1000000)
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/** \brief Supported Intel C3 flash manufacturer ID. */
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#define FLASH_DEV_MAN_ID ((blt_int16u)0x0089)
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/** \brief Supported Intel C3 flash device ID. */
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#define FLASH_DEV_ID ((blt_int16u)0x88c3)
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/** \brief Offset for reading manufacturer ID. */
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#define FLASH_DEVINFO_MAN_ID ((blt_int16u)0x0000)
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/** \brief Offset for reading device ID. */
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#define FLASH_DEVINFO_DEV_ID ((blt_int16u)0x0001)
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/** \brief Offset for reading lock status. */
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#define FLASH_DEVINFO_LOCK_STATUS ((blt_int16u)0x0002)
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/** \brief Runtime efficient macro for obtaining the manufacturer ID. */
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#define ExtFlashGetManID() (ExtFlashGetDeviceInfo(flashLayout[0].sector_start, \
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FLASH_DEVINFO_MAN_ID))
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/** \brief Runtime efficient macro for obtaining the device ID. */
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#define ExtFlashGetDevID() (ExtFlashGetDeviceInfo(flashLayout[0].sector_start, \
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FLASH_DEVINFO_DEV_ID))
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/** \brief Runtime efficient macro for obtaining the lock status. */
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#define ExtFlashGetLockStatus(base) (ExtFlashGetDeviceInfo(base, \
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FLASH_DEVINFO_LOCK_STATUS))
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/****************************************************************************************
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* Type definitions
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****************************************************************************************/
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/** \brief Flash sector descriptor type. */
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typedef struct
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{
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blt_addr sector_start; /**< sector start address */
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blt_int32u sector_size; /**< sector size in bytes */
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blt_int8u sector_num; /**< sector number */
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} tFlashSector;
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/** \brief Structure type for grouping flash block information.
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* \details Programming is done per block of max FLASH_WRITE_BLOCK_SIZE. for this a
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* flash block manager is implemented in this driver. this flash block manager
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* depends on this flash block info structure. It holds the base address of
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* the flash block and the data that should be programmed into the flash
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* block.
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*/
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typedef struct
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{
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blt_addr base_addr; /**< Base address for the flash operation.*/
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blt_int8u data[FLASH_WRITE_BLOCK_SIZE]; /**< Data array. */
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} tFlashBlockInfo;
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/****************************************************************************************
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* Function prototypes
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****************************************************************************************/
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static blt_bool ExtFlashInitBlock(tFlashBlockInfo *block, blt_addr address);
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static tFlashBlockInfo *ExtFlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr);
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static blt_bool ExtFlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
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blt_int8u *data, blt_int32u len);
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static blt_bool ExtFlashWriteBlock(tFlashBlockInfo *block);
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static blt_bool ExtFlashEraseSector(blt_addr sector_base);
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static blt_int16u ExtFlashGetDeviceInfo(blt_addr block_base, blt_int16u info);
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static void ExtFlashLockSector(blt_addr sector_base);
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static void ExtFlashUnlockSector(blt_addr sector_base);
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static blt_int8u ExtFlashGetSector(blt_addr address);
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/****************************************************************************************
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* Local constant declarations
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****************************************************************************************/
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/** \brief Array wit the layout of the flash memory.
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* \details The current layout supports the 2MB external C3 Intel flash:
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* - manufacturer id = 0x0089
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* - device id = 0x88c3 (16 Mbit bottom boot device)
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* Note that what Intel calls a block in the user manual, is called a sector in this
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* driver.
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*/
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static const tFlashSector flashLayout[] =
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{
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{ 0x80000000, 0x02000, 0}, /* flash sector 0 - 8 kbyte */
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{ 0x80002000, 0x02000, 1}, /* flash sector 1 - 8 kbyte */
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{ 0x80004000, 0x02000, 2}, /* flash sector 2 - 8 kbyte */
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{ 0x80006000, 0x02000, 3}, /* flash sector 3 - 8 kbyte */
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{ 0x80008000, 0x02000, 4}, /* flash sector 4 - 8 kbyte */
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{ 0x8000A000, 0x02000, 5}, /* flash sector 5 - 8 kbyte */
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{ 0x8000C000, 0x02000, 6}, /* flash sector 6 - 8 kbyte */
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{ 0x8000E000, 0x02000, 7}, /* flash sector 7 - 8 kbyte */
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{ 0x80010000, 0x10000, 8}, /* flash sector 8 - 64 kbyte */
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{ 0x80020000, 0x10000, 9}, /* flash sector 9 - 64 kbyte */
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{ 0x80030000, 0x10000, 10}, /* flash sector 10 - 64 kbyte */
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{ 0x80040000, 0x10000, 11}, /* flash sector 11 - 64 kbyte */
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{ 0x80050000, 0x10000, 12}, /* flash sector 12 - 64 kbyte */
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{ 0x80060000, 0x10000, 13}, /* flash sector 13 - 64 kbyte */
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{ 0x80070000, 0x10000, 14}, /* flash sector 14 - 64 kbyte */
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{ 0x80080000, 0x10000, 15}, /* flash sector 15 - 64 kbyte */
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{ 0x80090000, 0x10000, 16}, /* flash sector 16 - 64 kbyte */
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{ 0x800A0000, 0x10000, 17}, /* flash sector 17 - 64 kbyte */
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{ 0x800B0000, 0x10000, 18}, /* flash sector 18 - 64 kbyte */
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{ 0x800C0000, 0x10000, 19}, /* flash sector 19 - 64 kbyte */
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{ 0x800D0000, 0x10000, 20}, /* flash sector 20 - 64 kbyte */
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{ 0x800E0000, 0x10000, 21}, /* flash sector 21 - 64 kbyte */
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{ 0x800F0000, 0x10000, 22}, /* flash sector 22 - 64 kbyte */
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{ 0x80100000, 0x10000, 23}, /* flash sector 23 - 64 kbyte */
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{ 0x80110000, 0x10000, 24}, /* flash sector 24 - 64 kbyte */
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{ 0x80120000, 0x10000, 25}, /* flash sector 25 - 64 kbyte */
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{ 0x80130000, 0x10000, 26}, /* flash sector 26 - 64 kbyte */
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{ 0x80140000, 0x10000, 27}, /* flash sector 27 - 64 kbyte */
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{ 0x80150000, 0x10000, 28}, /* flash sector 28 - 64 kbyte */
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{ 0x80160000, 0x10000, 29}, /* flash sector 29 - 64 kbyte */
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{ 0x80170000, 0x10000, 30}, /* flash sector 30 - 64 kbyte */
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{ 0x80180000, 0x10000, 31}, /* flash sector 31 - 64 kbyte */
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{ 0x80190000, 0x10000, 32}, /* flash sector 32 - 64 kbyte */
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{ 0x801A0000, 0x10000, 33}, /* flash sector 33 - 64 kbyte */
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{ 0x801B0000, 0x10000, 34}, /* flash sector 34 - 64 kbyte */
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{ 0x801C0000, 0x10000, 35}, /* flash sector 35 - 64 kbyte */
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{ 0x801D0000, 0x10000, 36}, /* flash sector 36 - 64 kbyte */
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{ 0x801E0000, 0x10000, 37}, /* flash sector 37 - 64 kbyte */
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{ 0x801F0000, 0x10000, 38} /* flash sector 38 - 64 kbyte */
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};
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/****************************************************************************************
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* Local data declarations
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****************************************************************************************/
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/** \brief Local variable with information about the flash block that is currently
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* being operated on.
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* \details The smallest amount of flash that can be programmed is
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* FLASH_WRITE_BLOCK_SIZE. A flash block manager is implemented in this driver
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* and stores info in this variable. Whenever new data should be flashed, it
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* is first added to a RAM buffer, which is part of this variable. Whenever
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* the RAM buffer, which has the size of a flash block, is full or data needs
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* to be written to a different block, the contents of the RAM buffer are
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* programmed to flash. The flash block manager requires some software
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* overhead, yet results is faster flash programming because data is first
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* harvested, ideally until there is enough to program an entire flash block,
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* before the flash device is actually operated on.
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*/
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static tFlashBlockInfo blockInfo;
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/************************************************************************************//**
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** \brief Initializes the flash driver.
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** \return none.
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**
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****************************************************************************************/
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void ExtFlashInit(void)
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{
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/* init the flash block info struct by setting the address to an invalid address */
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blockInfo.base_addr = FLASH_INVALID_ADDRESS;
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/* check the flash device identification */
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if ((ExtFlashGetManID() != FLASH_DEV_MAN_ID) || (ExtFlashGetDevID() != FLASH_DEV_ID))
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{
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ASSERT_RT(BLT_FALSE);
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}
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} /*** end of ExtFlashInit ***/
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/************************************************************************************//**
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** \brief Writes the data to flash.
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** \param addr Start address.
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** \param len Length in bytes.
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** \param data Pointer to the data buffer.
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** \return BLT_NVM_OKAY if successful, BLT_NVM_NOT_IN_RANGE if the address is
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** not within the supported memory range, or BLT_NVM_ERROR is the write
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** operation failed.
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**
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****************************************************************************************/
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blt_int8u ExtFlashWrite(blt_addr addr, blt_int32u len, blt_int8u *data)
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{
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/* make sure the addresses are within the flash device */
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if ( (ExtFlashGetSector(addr) == FLASH_INVALID_SECTOR) || \
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(ExtFlashGetSector(addr+len-1) == FLASH_INVALID_SECTOR) )
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{
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return BLT_NVM_NOT_IN_RANGE;
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}
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/* let the block manager handle it */
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if (ExtFlashAddToBlock(&blockInfo, addr, data, len) == BLT_FALSE)
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{
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return BLT_NVM_ERROR;
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}
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return BLT_NVM_OKAY;
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} /*** end of FlashWrite ***/
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/************************************************************************************//**
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** \brief Erases the flash memory. Note that this function also checks that no
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** data is erased outside the flash memory region.
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** \param addr Start address.
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** \param len Length in bytes.
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** \return BLT_NVM_OKAY if successful, BLT_NVM_NOT_IN_RANGE if the address is
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** not within the supported memory range, or BLT_NVM_ERROR is the erase
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** operation failed.
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**
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****************************************************************************************/
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blt_int8u ExtFlashErase(blt_addr addr, blt_int32u len)
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{
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blt_int8u first_sector;
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blt_int8u last_sector;
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blt_int8u sectorIdx;
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/* obtain the first and last sector number */
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first_sector = ExtFlashGetSector(addr);
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last_sector = ExtFlashGetSector(addr+len-1);
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/* check them */
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if ( (first_sector == FLASH_INVALID_SECTOR) || (last_sector == FLASH_INVALID_SECTOR) )
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{
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return BLT_NVM_NOT_IN_RANGE;
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}
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/* erase the sectors one-by-one */
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for (sectorIdx = first_sector; sectorIdx <= last_sector; sectorIdx++)
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{
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/* keep the watchdog happy */
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CopService();
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/* erase the sector */
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if (ExtFlashEraseSector(flashLayout[sectorIdx].sector_start) == BLT_FALSE)
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{
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return BLT_NVM_ERROR;
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}
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}
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/* done so return the result of the operation */
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return BLT_NVM_OKAY;
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} /*** end of ExtFlashErase ***/
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/************************************************************************************//**
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** \brief Finalizes the flash driver operations.
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** \return BLT_TRUE is succesful, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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blt_bool ExtFlashDone(void)
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{
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/* check if there is still data waiting to be programmed */
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if (blockInfo.base_addr != FLASH_INVALID_ADDRESS)
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{
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if (ExtFlashWriteBlock(&blockInfo) == BLT_FALSE)
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{
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return BLT_FALSE;
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}
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}
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/* still here so all is okay */
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return BLT_TRUE;
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} /*** end of ExtFlashDone ***/
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/************************************************************************************//**
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** \brief Copies data currently in flash to the block->data and sets the
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** base address.
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** \param block Pointer to flash block info structure to operate on.
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** \param address Base address of the block data.
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** \return BLT_TRUE is succesful, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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static blt_bool ExtFlashInitBlock(tFlashBlockInfo *block, blt_addr address)
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{
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/* check address alignment */
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if ((address % FLASH_WRITE_BLOCK_SIZE) != 0)
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{
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return BLT_FALSE;
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}
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/* make sure that we are initializing a new block and not the same one */
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if (block->base_addr == address)
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{
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/* block already initialized, so nothing to do */
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return BLT_TRUE;
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}
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/* set the base address and copies the current data from flash */
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block->base_addr = address;
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CpuMemCopy((blt_addr)block->data, address, FLASH_WRITE_BLOCK_SIZE);
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return BLT_TRUE;
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} /*** end of ExtFlashInitBlock ***/
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/************************************************************************************//**
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** \brief Switches blocks by programming the current one and initializing the next.
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** \param block Pointer to flash block info structure to operate on.
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** \param base_addr Base address for the next block.
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** \return The pointer of the block info struct that is no being used, or a NULL
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** pointer in case of error.
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**
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****************************************************************************************/
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static tFlashBlockInfo *ExtFlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr)
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{
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/* need to switch to a new block, so program the current one and init the next */
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if (ExtFlashWriteBlock(block) == BLT_FALSE)
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{
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return BLT_NULL;
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}
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/* initialize the new block when necessary */
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if (ExtFlashInitBlock(block, base_addr) == BLT_FALSE)
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{
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return BLT_NULL;
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}
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/* still here to all is okay */
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return block;
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} /*** end of ExtFlashSwitchBlock ***/
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/************************************************************************************//**
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** \brief Programming is done per block. This function adds data to the block
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** that is currently collecting data to be written to flash. If the
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** address is outside of the current block, the current block is written
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** to flash an a new block is initialized.
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** \param block Pointer to flash block info structure to operate on.
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** \param address Flash destination address.
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** \param data Pointer to the byte array with data.
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** \param len Number of bytes to add to the block.
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** \return BLT_TRUE if successful, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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static blt_bool ExtFlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
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blt_int8u *data, blt_int32u len)
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{
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blt_addr current_base_addr;
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blt_int8u *dst;
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blt_int8u *src;
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/* determine the current base address */
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current_base_addr = (address/FLASH_WRITE_BLOCK_SIZE)*FLASH_WRITE_BLOCK_SIZE;
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/* make sure the blockInfo is not uninitialized */
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if (block->base_addr == FLASH_INVALID_ADDRESS)
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{
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/* initialize the blockInfo struct for the current block */
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if (ExtFlashInitBlock(block, current_base_addr) == BLT_FALSE)
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{
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return BLT_FALSE;
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}
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}
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/* check if the new data fits in the current block */
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if (block->base_addr != current_base_addr)
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{
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/* need to switch to a new block, so program the current one and init the next */
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block = ExtFlashSwitchBlock(block, current_base_addr);
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if (block == BLT_NULL)
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{
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return BLT_FALSE;
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}
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}
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/* add the data to the current block, but check for block overflow */
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dst = &(block->data[address - block->base_addr]);
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src = data;
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do
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{
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/* keep the watchdog happy */
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CopService();
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/* buffer overflow? */
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if ((blt_addr)(dst-&(block->data[0])) >= FLASH_WRITE_BLOCK_SIZE)
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{
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/* need to switch to a new block, so program the current one and init the next */
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block = ExtFlashSwitchBlock(block, current_base_addr+FLASH_WRITE_BLOCK_SIZE);
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if (block == BLT_NULL)
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{
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return BLT_FALSE;
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}
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/* reset destination pointer */
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dst = &(block->data[0]);
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}
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/* write the data to the buffer */
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*dst = *src;
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|
/* update pointers */
|
|
dst++;
|
|
src++;
|
|
/* decrement byte counter */
|
|
len--;
|
|
}
|
|
while (len > 0);
|
|
/* still here so all is good */
|
|
return BLT_TRUE;
|
|
} /*** end of ExtFlashAddToBlock ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Programs FLASH_WRITE_BLOCK_SIZE bytes to flash from the block->data array.
|
|
** \param block Pointer to flash block info structure to operate on.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool ExtFlashWriteBlock(tFlashBlockInfo *block)
|
|
{
|
|
volatile blt_int16u *pAddr;
|
|
volatile blt_int16u *pData;
|
|
blt_bool result = BLT_TRUE;
|
|
volatile blt_int32u timeout = 0;
|
|
|
|
/* unlock the sector */
|
|
ExtFlashUnlockSector(block->base_addr);
|
|
/* init pointer to valid address in the flash block */
|
|
pAddr = (blt_int16u *)block->base_addr;
|
|
/* init pointer to start of block data */
|
|
pData = (blt_int16u *)block->data;
|
|
/* program all block data 16-bits at a time */
|
|
while ((blt_addr)pAddr < (block->base_addr+FLASH_WRITE_BLOCK_SIZE))
|
|
{
|
|
/* keep the watchdog happy */
|
|
CopService();
|
|
/* issue program setup command */
|
|
*pAddr = FLASH_CMD_PROGRAM_MODE;
|
|
/* write 16-bit data that is to be programmed to start programming operation */
|
|
*pAddr = *pData;
|
|
/* check status register for completion */
|
|
*pAddr = FLASH_CMD_READ_STATUS_MODE;
|
|
/* wait for completion or timeout */
|
|
while( ((*pAddr & FLASH_STATUS_READY_BIT) == 0) && (timeout < FLASH_PROGRAM_TIMEOUT) )
|
|
{
|
|
timeout++;
|
|
}
|
|
/* check for possible errors */
|
|
if ( (timeout >= FLASH_ERASE_TIMEOUT) || \
|
|
((*pAddr & (FLASH_ERR_LOCKED | FLASH_ERR_VPP_RANGE | FLASH_ERR_PROGRAM))!= 0) )
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
/* clear the status register */
|
|
*pAddr = FLASH_CMD_CLEAR_STATUS;
|
|
/* increment address and data pointers */
|
|
pAddr++;
|
|
pData++;
|
|
}
|
|
/* lock the sector. this also switches back to read array mode */
|
|
ExtFlashLockSector(block->base_addr);
|
|
/* inform the caller about the result */
|
|
return result;
|
|
} /*** end of ExtFlashWriteBlock ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Erases the flash sector.
|
|
** \param sector_base Base address of the sector to erase.
|
|
** \return BLT_TRUE if successful, BLT_FALSE otherwise.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_bool ExtFlashEraseSector(blt_addr sector_base)
|
|
{
|
|
volatile blt_int16u *pAddr;
|
|
blt_bool result = BLT_TRUE;
|
|
volatile blt_int32u timeout = 0;
|
|
|
|
/* unlock the sector */
|
|
ExtFlashUnlockSector(sector_base);
|
|
/* init pointer to valid address in the flash sector */
|
|
pAddr = (blt_int16u *)sector_base;
|
|
/* issue erase setup command */
|
|
*pAddr = FLASH_CMD_ERASE_MODE;
|
|
/* issue erase confirm command */
|
|
*pAddr = FLASH_CMD_ERASE_CONFIRM;
|
|
/* check status register for completion */
|
|
*pAddr = FLASH_CMD_READ_STATUS_MODE;
|
|
/* wait for completion or timeout */
|
|
while( ((*pAddr & FLASH_STATUS_READY_BIT) == 0) && (timeout < FLASH_ERASE_TIMEOUT) )
|
|
{
|
|
timeout++;
|
|
}
|
|
/* check for possible errors */
|
|
if ( (timeout >= FLASH_ERASE_TIMEOUT) || \
|
|
((*pAddr & (FLASH_ERR_LOCKED | FLASH_ERR_VPP_RANGE | FLASH_ERR_ERASE))!= 0) )
|
|
{
|
|
result = BLT_FALSE;
|
|
}
|
|
/* clear the status register */
|
|
*pAddr = FLASH_CMD_CLEAR_STATUS;
|
|
/* lock the sector. this also switches back to read array mode */
|
|
ExtFlashLockSector(sector_base);
|
|
/* inform the caller about the result */
|
|
return result;
|
|
} /*** end of ExtFlashEraseSector ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Locks the flash sector.
|
|
** \param sector_base Base address of the sector to lock.
|
|
** \return none.
|
|
**
|
|
****************************************************************************************/
|
|
static void ExtFlashLockSector(blt_addr sector_base)
|
|
{
|
|
volatile blt_int16u *pAddr;
|
|
|
|
/* no need to lock a sector that is already locked */
|
|
if ((ExtFlashGetLockStatus(sector_base) & FLASH_LOCK_BIT) != 0)
|
|
{
|
|
return;
|
|
}
|
|
/* init pointer to valid address in the flash sector */
|
|
pAddr = (blt_int16u *)sector_base;
|
|
/* switch to change lock mode */
|
|
*pAddr = FLASH_CMD_CHANGE_LOCK_MODE;
|
|
/* unlock the sector */
|
|
*pAddr = FLASH_CMD_LOCK_SECTOR;
|
|
/* check that the sector is now actually locked */
|
|
ASSERT_RT((ExtFlashGetLockStatus(sector_base) & FLASH_LOCK_BIT) != 0);
|
|
} /*** end of ExtFlashLockSector ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Unlocks the flash sector.
|
|
** \param sector_base Base address of the sector to unlock.
|
|
** \return none.
|
|
**
|
|
****************************************************************************************/
|
|
static void ExtFlashUnlockSector(blt_addr sector_base)
|
|
{
|
|
volatile blt_int16u *pAddr;
|
|
|
|
/* no need to unlock a sector that is already unlocked */
|
|
if ((ExtFlashGetLockStatus(sector_base) & FLASH_LOCK_BIT) == 0)
|
|
{
|
|
return;
|
|
}
|
|
/* init pointer to valid address in the flash sector */
|
|
pAddr = (blt_int16u *)sector_base;
|
|
/* switch to change lock mode */
|
|
*pAddr = FLASH_CMD_CHANGE_LOCK_MODE;
|
|
/* unlock the sector */
|
|
*pAddr = FLASH_CMD_UNLOCK_SECTOR;
|
|
/* check that the sector is now actually unlocked */
|
|
ASSERT_RT((ExtFlashGetLockStatus(sector_base) & FLASH_LOCK_BIT) == 0);
|
|
} /*** end of ExtFlashUnlockSector ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Obtains device information from the flash device.
|
|
** \param sector_base Base address of the sector to get the info from.
|
|
** \param info Identifier to the type of info to obtain.
|
|
** \return Device info.
|
|
**
|
|
****************************************************************************************/
|
|
static blt_int16u ExtFlashGetDeviceInfo(blt_addr sector_base, blt_int16u info)
|
|
{
|
|
volatile blt_int16u *pAddr;
|
|
blt_int16u readData;
|
|
|
|
/* init pointer to any valid address in the flash device */
|
|
pAddr = (blt_int16u *)sector_base + info;
|
|
/* switch to read identifier mode */
|
|
*pAddr = FLASH_CMD_READ_ID_MODE;
|
|
/* read the info */
|
|
readData = *pAddr;
|
|
/* switch back to reading mode */
|
|
*pAddr = FLASH_CMD_READ_ARRAY_MODE;
|
|
/* return the result */
|
|
return readData;
|
|
} /*** end of ExtFlashGetDeviceInfo ***/
|
|
|
|
|
|
/************************************************************************************//**
|
|
** \brief Determines the flash sector the address is in.
|
|
** \param address Address in the flash sector.
|
|
** \return Flash sector number or FLASH_INVALID_SECTOR
|
|
**
|
|
****************************************************************************************/
|
|
static blt_int8u ExtFlashGetSector(blt_addr address)
|
|
{
|
|
blt_int8u sectorIdx;
|
|
|
|
/* search through the sectors to find the right one */
|
|
for (sectorIdx = 0; sectorIdx < FLASH_TOTAL_SECTORS; sectorIdx++)
|
|
{
|
|
/* keep the watchdog happy */
|
|
CopService();
|
|
/* is the address in this sector? */
|
|
if ( (address >= flashLayout[sectorIdx].sector_start) && \
|
|
(address < (flashLayout[sectorIdx].sector_start + \
|
|
flashLayout[sectorIdx].sector_size)) )
|
|
{
|
|
/* return the sector number */
|
|
return flashLayout[sectorIdx].sector_num;
|
|
}
|
|
}
|
|
/* still here so no valid sector found */
|
|
return FLASH_INVALID_SECTOR;
|
|
} /*** end of ExtFlashGetSector ***/
|
|
#endif
|
|
|
|
/*********************************** end of extflash.c *********************************/
|