S3C6410+K9GAG08的H-JTAG的驱动

/*================================================================================================= NOTE: This file implements all the operations for S3C6410+K9GAG08. To use on other hardware platforms, please modify accordingly. ==================================================================================================*/ #include "Types.h" #include "Comm.h" #include "Flash.h" /*================================================================================================= FUNCTION: nand_wait() DESCRIPTION: Used to check if device is busy or ready for new command. Return only when the device is ready. ARGUMENTS PASSED: None RETURN VALUE: None ==================================================================================================*/ void nand_wait(void) { while( !(*SysAddr32(NFSTAT) & 0x1) ); } /*================================================================================================= FUNCTION: nand_init() DESCRIPTION: Used to do some initialization. User can put any initialization inside this function. ARGUMENTS PASSED: None RETURN VALUE: None ==================================================================================================*/ void nand_init(void) { //Config *SysAddr32(NFCONF) = 0x01007770; //Control *SysAddr32(NFCTRL) = 0x000400C5; //Reset nand_wait(); *SysAddr32(NFCMD) = 0xFF; nand_wait(); } /*================================================================================================= FUNCTION: nand_read_id() DESCRIPTION: Used to read the flash ID. ARGUMENTS PASSED: None RETURN VALUE: U32 id - Read flash ID. ==================================================================================================*/ U32 nand_read_id(void) { U8 id1; U8 id2; //Read ID nand_wait(); *SysAddr32(NFCMD) = 0x90; *SysAddr32(NFADDR) = 0x00; nand_wait(); id1 = *SysAddr8(NFDATA); id2 = *SysAddr8(NFDATA); return ((id2<<16) | id1); } /*================================================================================================= FUNCTION: nand_read_page() DESCRIPTION: Used to read one page. ARGUMENTS PASSED: U32 blockidx - [i] Block index/number for read operation. U32 pageidx - [i] Page index/number for read operation. RETURN VALUE: None ==================================================================================================*/ void nand_read_page(U32 blockidx, U32 pageidx) { int i; U32 blkpgnum; U32 *ptr32; U8 data[4]; ptr32 = (U32*)data; blkpgnum = blockidx*NAND_BLOCK_PAGE_NUM + pageidx; //Read a page nand_wait(); *SysAddr32(NFCMD) = 0x00; *SysAddr32(NFADDR) = 0x00; *SysAddr32(NFADDR) = 0x00; *SysAddr32(NFADDR) = (blkpgnum>>0) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>8) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>16) & 0xFF; *SysAddr32(NFCMD) = 0x30; nand_wait(); for(i = 0; i < NAND_PAGE_SIZE; i += 4){ data[0] = *SysAddr8(NFDATA); data[1] = *SysAddr8(NFDATA); data[2] = *SysAddr8(NFDATA); data[3] = *SysAddr8(NFDATA); write_to_host(*ptr32); } } /*================================================================================================= FUNCTION: nand_program_page() DESCRIPTION: Used to program one page. ARGUMENTS PASSED: U32 blockidx - [i] Block index/number for program operation. U32 pageidx - [i] Page index/number for program operation. RETURN VALUE: U32 0 - Program the page successfully. 1 - Program the page unsuccessfully. ==================================================================================================*/ U32 nand_program_page(U32 blockidx, U32 pageidx) { int i; U32 blkpgnum; U32 *ptr32; U8 data[4]; ptr32 = (U32*)data; blkpgnum = blockidx*NAND_BLOCK_PAGE_NUM + pageidx; //Program a page nand_wait(); *SysAddr32(NFCMD) = 0x80; *SysAddr32(NFADDR) = 0x00; *SysAddr32(NFADDR) = 0x00; *SysAddr32(NFADDR) = (blkpgnum>>0) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>8) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>16) & 0xFF; for(i = 0; i < NAND_PAGE_SIZE; i += 4){ *ptr32 = read_from_host(); *SysAddr8(NFDATA) = data[0]; *SysAddr8(NFDATA) = data[1]; *SysAddr8(NFDATA) = data[2]; *SysAddr8(NFDATA) = data[3]; } *SysAddr32(NFCMD) = 0x10; nand_wait(); //Read status *SysAddr32(NFCMD) = 0x70; nand_wait(); if(*SysAddr8(NFDATA) & 0x1) return 1; return 0; } /*================================================================================================= FUNCTION: nand_erase_block() DESCRIPTION: Used to erase one block. If can't erase, mark as bad/invalid block. ARGUMENTS PASSED: U32 blockidx - [i] Block index/number for erase operation. RETURN VALUE: U32 0 - Erase the block successfully. 1 - Erase the block unsuccessfully. ==================================================================================================*/ U32 nand_erase_block(U32 blockidx) { U32 blkpgnum; blkpgnum = blockidx * NAND_BLOCK_PAGE_NUM; //Erase a block nand_wait(); *SysAddr32(NFCMD) = 0x60; *SysAddr32(NFADDR) = (blkpgnum>>0) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>8) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>16) & 0xFF; *SysAddr32(NFCMD) = 0xD0; nand_wait(); //Read status *SysAddr32(NFCMD) = 0x70; nand_wait(); if(*SysAddr8(NFDATA) & 0x1){ nand_mark_badblock(blockidx); return 1; } return 0; } /*================================================================================================= FUNCTION: nand_check_blank() DESCRIPTION: Used to check if a block is blank or not. ARGUMENTS PASSED: U32 blockidx - [i] Block index/number for blank check operation. RETURN VALUE: U32 0 - The specified block is blank. 1 - The specified block is NOT blank. ==================================================================================================*/ U32 nand_check_blank(U32 blockidx) { int i; U32 pageidx; U32 blkpgnum; U32 *ptr32; U8 data[4]; ptr32 = (U32*)data; blkpgnum = blockidx*NAND_BLOCK_PAGE_NUM; //Read a page for(pageidx = 0; pageidx < NAND_BLOCK_PAGE_NUM; pageidx += 1){ nand_wait(); *SysAddr32(NFCMD) = 0x00; *SysAddr32(NFADDR) = 0x00; *SysAddr32(NFADDR) = 0x00; *SysAddr32(NFADDR) = (blkpgnum>>0) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>8) & 0xFF; *SysAddr32(NFADDR) = (blkpgnum>>16) & 0xFF; *SysAddr32(NFCMD) = 0x30; nand_wait(); for(i = 0; i < NAND_PAGE_SIZE; i += 4){ data[0] = *SysAddr8(NFDATA); data[1] = *SysAddr8(NFDATA); data[2] = *SysAddr8(NFDATA); data[3] = *SysAddr8(NFDATA); if(*ptr32 != 0xFFFFFFFF) return 1; } blkpgnum += 1; } return 0; } /*================================================================================================= FUNCTION: nand_mark_badblock() DESCRIPTION: Used to mark a bad/invalid block. ARGUMENTS PASSED: U32 blockidx - [i] Block index/number to be marked. RETURN VALUE: U32 0 - Mark successfully. 1 - Mark unsuccessfully. ==================================================================================================*/ U32 nand_mark_badblock(U32 blockidx) { return 0; } /*================================================================================================= FUNCTION: nand_is_badblock() DESCRIPTION: Used to check if a block is bad/invalid or not. ARGUMENTS PASSED: U32 blockidx - [i] Block index/number to be checked. RETURN VALUE: U32 0 - The specified block