📄 nf.c
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/*C**************************************************************************
* $RCSfile: nf.c,v $
*----------------------------------------------------------------------------
* Copyright (c) 2002 Atmel.
*----------------------------------------------------------------------------
* RELEASE: $Name: DEMO_FAT_1_9_9 $
* REVISION: $Revision: 1.11 $
* FILE_CVSID: $Id: nf.c,v 1.11 2002/09/06 13:17:19 njourdan Exp $
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the high level NF routines
*****************************************************************************/
/*_____ I N C L U D E S ____________________________________________________*/
#include "..\src\system\config.h" /* system configuration */
#include "..\..\lib_demob\board.h" /* board definition */
#include "..\..\lib\usb\usb_drv.h" /* usb driver definition */
#include "..\..\lib_mem\nf\nf.h" /* NF definition */
#include "..\..\lib_mem\mmc\mmc.h" /* MMC definition */
extern void fat_format (bit );
/*_____ M A C R O S ________________________________________________________*/
/*_____ D E F I N I T I O N ________________________________________________*/
xdata Byte nf_send_cmd At(NF_CMD_LATCH_ENABLE_ADD); /* Command */
xdata Byte nf_send_add At(NF_ADD_LATCH_ENABLE_ADD); /* Address */
xdata Byte volatile nf_data At(NF_ADDRESS_CMD_DATA);/* Data */
/* Card Identification System definition */
code Byte nf_cis_table[]=
{
0x01, 0x03, 0xD9, 0x01, 0xFF, 0x18, 0x02, 0xDF, 0x01, 0x20, 0x04, 0x00, 0x00, 0x00, 0x00, 0x21,
0x02, 0x04, 0x01, 0x22, 0x02, 0x01, 0x01, 0x22, 0x03, 0x02, 0x04, 0x07, 0x1A, 0x05, 0x01, 0x03,
0x00, 0x02, 0x0F, 0x1B, 0x08, 0xC0, 0xC0, 0xA1, 0x01, 0x55, 0x08, 0x00, 0x20, 0x1B, 0x0A, 0xC1,
0x41, 0x99, 0x01, 0x55, 0x64, 0xF0, 0xFF, 0xFF, 0x20, 0x1B, 0x0C, 0x82, 0x41, 0x18, 0xEA, 0x61,
0xF0, 0x01, 0x07, 0xF6, 0x03, 0x01, 0xEE, 0x1B, 0x0C, 0x83, 0x41, 0x18, 0xEA, 0x61, 0x70, 0x01,
0x07, 0x76, 0x03, 0x01, 0xEE, 0x15, 0x14, 0x05, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x00, 0x20, 0x20, 0x20, 0x20, 0x00, 0x30, 0x2E, 0x30, 0x00, 0xFF, 0x14, 0x00, 0xFF, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/*_____ D E C L A R A T I O N ______________________________________________*/
extern data Uint32 gl_ptr_mem; /* memory data pointer */
extern pdata Byte gl_buffer[];
data Uint32 current_physical_sector_addr; /* give the address of the current sector */
data Uint32 address; /* general address variable */
data Uint16 look_up_table_block; /* look up table address (block) */
data Byte nf_zone; /* current zone number */
data Byte gl_buf_idx;
data Byte gl_buf_free_idx ;
bdata bit block_used; /* Set when a block was used */
bdata bit nf_busy; /* indicate that nand flash is busy */
bdata bit lut_modified; /* indicate that LUT have been modified */
bdata bit zone_change; /* indicate that we have to change zone */
xdata Uint16 logical_block; /* Current logical block value */
xdata Uint16 lut_block[NF_ZONE_MAX]; /* LUT address (block value) */
xdata Uint16 buf_free[24]; /* contain free physical block address */
xdata Uint16 spare_block; /* number of free block */
xdata Uint16 block_to_be_deleted; /* give the address of the next deleted block */
xdata Uint16 block_min; /* address of the first block in the buffer */
xdata Uint16 block_max; /* address of the last block in the buffer */
xdata Union16 buf[NF_BUFFER_SIZE]; /* Buffer for write operation */
xdata Byte nf_old_zone; /* for zone change */
xdata Byte lut_index[NF_ZONE_MAX]; /* give the index for updating LUT */
xdata Byte nf_spare_block_number[NF_ZONE_MAX];/* Number of free spare block in each zone */
idata Uint16 redundant_logical_block_value; /* Logical block value in the redundant area */
idata Uint16 gl_cpt_page; /* internal page counter (byte access) */
idata Byte gl_buf_idx_max; /* max index for updating LUT */
/*F**************************************************************************
* NAME: read_spare_byte
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* read spare data byte and construct the look up table.
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void read_spare_byte(void)
{
data Uint16 block;
data Uint16 j; /* counter */
data Uint16 i; /* counter */
bit block_valid;
xdata Uint32 temp_address;
xdata Byte byte_0, byte_5, byte_6;
xdata Uint16 free_bloc_pos;
xdata Uint16 last_physical_used_block[NF_ZONE_MAX]; /* Last physical block used */
xdata Uint16 start; /* start value for the construction of the LUT */
xdata Uint16 end; /* final value */
xdata Byte lut_is_present;
xdata Union16 block2;
Nf_CS_ON();
Nf_wait_busy();
/* Global media initialization */
block_min = 0xFFFF; /* Starting buffer value */
gl_buf_idx_max = 0; /* Max index in the buffer */
lut_modified = FALSE; /* Buffer change flag */
gl_buf_idx = 0; /* Main buffer index */
gl_buf_free_idx = 0; /* Free physical buffer idx */
nf_old_zone = 0xFF; /* Previous zone number */
for (i = 0; i < NF_ZONE_MAX; i++)
{
lut_index[i] = 0; /* LUT index */
}
lut_is_present = 0x00;
/***************************************************/
/* For each zone, this following lines : */
/* Search bad block */
/* Determine if a LUT is present */
/* Determine the last physical block */
/***************************************************/
address = 0; /* Start from physical sector 0 */
for (i = 0; i < NF_ZONE_MAX; i++) /* for each zone */
{
nf_spare_block_number[i] = 23; /* Initialize the spare block table */
last_physical_used_block[i] = (Uint16)(i) << 10;/* Initialize the last used physical block value */
for (j = NF_BLOCK_PER_ZONE; j != 0; j--) /* for each block */
{
Nf_send_command(NF_READ_C_AREA_CMD); /* C Area : redundant data */
Nf_send_address(0x00); /* */
Nf_send_address ( ((Byte*)&address)[3] ); /* 2nd address cycle */
Nf_send_address ( ((Byte*)&address)[2] ); /* 3rd address cycle */
if (NF_4_CYCLE_ADDRESS) /* Size of card >= 64Mbytes ?*/
Nf_send_address ( ((Byte*)&address)[1] ); /* 4th address cycle */
Nf_wait_busy();
byte_0 = Nf_rd_byte(); /* Byte 0 : User data byte */
Nf_rd_byte(); /* Byte 1 : User data byte */
Nf_rd_byte(); /* Byte 2 : User data byte */
Nf_rd_byte(); /* Byte 3 : */
Nf_rd_byte(); /* Byte 4 : */
byte_5 = Nf_rd_byte(); /* Byte 5 : Block status data */
if ( byte_5 != 0xFF ) /* block status data : valid/invalid block */
{
nf_spare_block_number[i]--; /* Defect block */
}
else /* Block is valid */
{
/* Determine is the block is a specific block */
byte_6 = Nf_rd_byte();
if ( (byte_6 == 0x00) || /* 0x00 = specific block */
( (byte_6 != 0xFF) && ( (byte_6 & 0xF8) != 0x10 ) && /* Value in redundant spare area not correct */
(byte_6 != 0xE8) ) /* Don't care about LUT block */
)
{
nf_spare_block_number[i]--; /* specific or invalid block */
}
else
{
/* Determine if the block is the look up table */
if (byte_6 == 0xE8) /* look up table ? */
{
lut_is_present |= (0x01) << i;
lut_block[i] = address >> 5;
}
/* Determine the last physical used block */
if ( (byte_6 & 0xF8) == 0x10) /* Used block */
{
last_physical_used_block[i] = address >> 5;
}
}
}
address += 32;
}
}
for (i = 0; i < NF_ZONE_MAX; i++)
{ /* Determine the index for each correct lut */
if ((lut_is_present & (0x01 << i)))
{
address = (Uint32)(lut_block[i]) << 5;
do
{
Nf_send_command(NF_READ_C_AREA_CMD); /* Send READ C Area command */
Nf_send_address( 0x00);
Nf_send_address ( ((Byte*)&address)[3] ); /* 2nd address cycle */
Nf_send_address ( ((Byte*)&address)[2] ); /* 3rd address cycle */
if (NF_4_CYCLE_ADDRESS) /* Size of card >= 64Mbytes ? */
Nf_send_address ( ((Byte*)&address)[1] ); /* 4th address cycle */
Nf_wait_busy();
byte_0 = Nf_rd_byte(); /* Byte 0 : User data byte */
Nf_rd_byte(); /* Byte 1 : User data byte */
Nf_rd_byte(); /* Byte 2 : User data byte */
Nf_rd_byte(); /* Byte 3 : */
Nf_rd_byte(); /* Byte 4 : */
byte_5 = Nf_rd_byte(); /* Byte 5 : Block status data */
byte_6 = Nf_rd_byte();
if (byte_6 == 0xE8)
lut_index[i]++;
address+=4;
}
while (byte_6 == 0xE8);
lut_index[i]--;
address = address - 4;
Nf_send_command(NF_READ_C_AREA_CMD); /* Send READ C Area command */
Nf_send_address( 0x00);
Nf_send_address ( ((Byte*)&address)[3] ); /* 2nd address cycle */
Nf_send_address ( ((Byte*)&address)[2] ); /* 3rd address cycle */
if (NF_4_CYCLE_ADDRESS) /* Size of card >= 64Mbytes ? */
Nf_send_address ( ((Byte*)&address)[1] ); /* 4th address cycle */
Nf_wait_busy();
byte_0 = Nf_rd_byte(); /* Byte 0 : User data byte */
if (byte_0 != 0xFF) /* LUT have been modified */
{
nf_block_erase(address);
lut_is_present &= ~((0x01) << i); /* Reset bi */
Nf_wait_busy();
lut_index[i] = 0;
}
}
}
/*****************************************************************/
/* Find free physical block for LUT for each zone */
/*****************************************************************/
for (i = 0; i < NF_ZONE_MAX; i++)
{
if (!(lut_is_present && (0x01 << i)))
{
block = last_physical_used_block[i];
start = (Uint16)(i) << 10; /* starting value for each zone */
if (block == start) /* starting block for scan */
{
block = start + 1023;
}
block_valid = FALSE; /* init flag block valid */
Nf_wait_busy();
do
{
address = (Uint32)(block) << 5;
Nf_send_command(NF_READ_C_AREA_CMD); /* Send READ C Area command */
Nf_send_address( 0x05 );
Nf_send_address ( ((Byte*)&address)[3] ); /* 2nd address cycle */
Nf_send_address ( ((Byte*)&address)[2] ); /* 3rd address cycle */
if (NF_4_CYCLE_ADDRESS) /* Size of card >= 64Mbytes ? */
Nf_send_address ( ((Byte*)&address)[1] ); /* 4th address cycle */
Nf_wait_busy();
byte_5 = Nf_rd_byte();
byte_6 = Nf_rd_byte();
if ( (byte_5 == 0xFF) && (byte_6 == 0xFF) ) /* not assigned and valid block */
{
block_valid = TRUE; /* find a correct block */
}
else /* else decrease block number */
{
if (block == start)
{
block = start + 1023;
}
else
{
block--;
}
}
}
while ( !block_valid );
lut_block[i] = block; /* Update look up table address */
}
}
/**********************************************************/
/* Create the look-up table */
/* Process is done zone per zone and by step of 256 blocks*/
/* ********************************************************/
for (nf_zone = 0; nf_zone < NF_ZONE_MAX; nf_zone++) /* for each zone */
{
if ( !(lut_is_present & (0x01 << nf_zone))) /* If not LUT */
{
start = 0x00;
end = 0x80; /* 256 bytes for gl_buffer <-> 128 blocks */
free_bloc_pos = (Uint16)(last_physical_used_block[nf_zone]);
address = (Uint32)(lut_block[nf_zone]) << 5;
do
{
nf_init_buffer(); /* Reinitialize the buffer */
temp_address = (Uint32)(nf_zone) << 15; /* We start at the beginning */
block = (Uint16)(nf_zone) << 10;
Nf_wait_busy();
for (j = NF_BLOCK_PER_ZONE; j != 0 ; j--) /* for each block */
{
Nf_send_command (NF_READ_C_AREA_CMD); /* Read Spare data value */
Nf_send_address ( 0x05 );
Nf_send_address ( ((Byte*)&temp_address)[3] ); /* 2nd address cycle */
Nf_send_address ( ((Byte*)&temp_address)[2] ); /* 3rd address cycle */
if (NF_4_CYCLE_ADDRESS) /* Size of card >= 64Mbytes ? */
Nf_send_address ( ((Byte*)&temp_address)[1] );/* 4th address cycle */
Nf_wait_busy();
byte_5 = Nf_rd_byte(); /* Block status byte */
if (byte_5 == 0xFF) /* If not a bad block */
{
block2.b[0] = Nf_rd_byte(); /* Read logical block address */
block2.b[1] = Nf_rd_byte();
if ( (block2.b[0] & 0xF8) == 0x10)
{
block2.w = (block2.w & 0x0FFF) >> 1;
if ( (block2.w < end) && (block2.w >= start))
{ /* Save logical block value in the buffer */
gl_buffer[2 * block2.b[1]] = block >> 8;
gl_buffer[2 * block2.b[1] + 1] = block;
}
}
}
temp_address += 32;
block++;
}
/* affect to the free physical block a fictive logical block */
/* free physical block => gl_buffer[x] = 0xFF */
temp_address = (Uint32)(free_bloc_pos) << 5;
for (i = 0; i <= 0xFE; i+=2)
{
if (gl_buffer[i] == 0xFF)
{
do /* Search free physical block */
{
temp_address += 32;
if (temp_address >= ((Uint32)(nf_zone + 1) << 15) )
temp_address = (Uint32)(nf_zone) << 15;
Nf_send_command(NF_READ_C_AREA_CMD);
Nf_send_address(0x05);
Nf_send_address ( ((Byte*)&temp_address)[3] ); /* 2nd address cycle */
Nf_send_address ( ((Byte*)&temp_address)[2] ); /* 3rd address cycle */
if (NF_4_CYCLE_ADDRESS) /* Size of card >= 64Mbytes ?*/
Nf_send_address ( ((Byte*)&temp_address)[1] );/* 4th address cycle */
Nf_wait_busy();
byte_5 = Nf_rd_byte(); /* Invalid/Valid block */
byte_6 = Nf_rd_byte(); /* Used/Unused block */
}
while ( ( (byte_6 != 0xFF) && (byte_6 != 0xE8) ) || (byte_5 != 0xFF) );
free_bloc_pos = temp_address >> 5;
gl_buffer[i] = (free_bloc_pos >> 8) + 0x80;
gl_buffer[i + 1] = free_bloc_pos;
}
}
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