📄 nf.c
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/*C**************************************************************************
* NAME: nf.c
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE: snd1c-refd-nf-4_0_3
* REVISION: 1.26
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the high level NF routines
*****************************************************************************/
/*_____ I N C L U D E S ____________________________________________________*/
#include "config.h" /* system configuration */
#include "board.h" /* board definition */
#include "lib_mcu\usb\usb_drv.h" /* usb driver definition */
#include "nf.h" /* NF definition */
/*_____ M A C R O S ________________________________________________________*/
#ifndef NF_CAPACITY_AUTO_DETECT
#error NF_CAPACITY_AUTO_DETECT must be defined in board.h
#endif
#if NF_CONFIG != NF_1X_512B
#error NF_CONFIG must be defined with NF_1X_512B in config.h
#endif
#ifndef NF_FULL_CHIP_ERASE
#error NF_FULL_CHIP_ERASE must be set to TRUE or FALSE in config.h
#endif
#ifndef MEM_RESERVED_SIZE
#error MEM_RESERVED_SIZE must be defined in config.h
#endif
/*_____ 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 */
/*_____ 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[];
extern bit reserved_disk_space;
data Uint32 nf_current_physical_sector_addr; /* address of current phys. sect. */
data Uint32 gl_address; /* general address variable */
data Uint16 nf_look_up_table_block; /* lut address (block) */
data Byte nf_zone; /* current zone number */
data Byte nf_gl_buf_idx; /* idx for cache */
data Byte gl_buf_free_idx ; /* idx for cache for free blocks */
data Uint16 gl_cpt_page; /* internal page counter */
bdata bit nf_block_used; /* set when a block was used */
bdata bit nf_busy; /* nand flash busy flag */
bdata bit nf_lut_modified; /* LUT modified flag */
bdata bit nf_reserved_space = FALSE;
idata Uint16 nf_logical_block; /* current logical block */
idata Byte nf_gl_buf_idx_max; /* max index for updating lut */
xdata Byte nf_spare_block; /* number of free block */
xdata Uint16 nf_lut_block[NF_ZONE_MAX]; /* lut address / zone (block) */
xdata Uint16 nf_buf_free[24]; /* contain free physical block address */
xdata Uint16 nf_block_to_be_deleted; /* give the address of the next deleted block */
xdata Uint16 nf_block_min; /* first address block in the buffer */
xdata Uint16 nf_block_max; /* last address block in the buffer */
xdata Union16 nf_buf[NF_BUFFER_SIZE]; /* cache for write operation */
xdata Byte nf_old_zone; /* for zone change */
xdata Byte nf_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 */
extern idata Uint16 nf_redundant_logical_block_value;/* Logical block value in the redundant area */
#if (NF_CAPACITY_AUTO_DETECT == TRUE) /* If autodetect capacity nand flash is active */
xdata Byte nf_zone_max; /* nf_zone_max definition */
xdata Byte nf_device_type; /* nf_device_type definition */
bdata bit nf_4_cycle_address; /* nf_4_cycle_address definition */
#endif
xdata Uint32 nf_mem_size;
xdata Uint32 nf_reserved_space_start;
/*F**************************************************************************
* NAME: nf_read_spare_byte
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
* OK : LUT construction complete
* KO : pb for LUT
*----------------------------------------------------------------------------
* PURPOSE:
* read spare data byte and construct the look up table.
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit nf_read_spare_byte(void)
{
Byte byte_5;
Byte byte_6;
Byte lut_is_present;
Uint16 block;
Uint16 j; /* counter */
Union16 block2;
bit block_valid;
xdata Uint16 last_physical_used_block[NF_ZONE_MAX]; /* Last physical block used */
#define half_page block_valid
#define temp_address gl_ptr_mem
#define i nf_zone
#define start gl_cpt_page
#define end nf_look_up_table_block
#define free_bloc_pos nf_logical_block
Nf_CS_ON();
Nf_wait_busy();
/* Global media initialization */
nf_block_min = 0xFFFF; /* Starting buffer value */
nf_gl_buf_idx_max = 0; /* Max index in the buffer */
nf_lut_modified = FALSE; /* Buffer change flag */
nf_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_CPT; i++)
{
nf_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 */
/***************************************************/
gl_address = 0; /* Start from physical sector 0 */
for (i = 0; i < NF_ZONE_MAX_CPT; 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_read_open_C_area(gl_address, 0x05);
if ( Nf_rd_byte() != 0xFF ) /* block status data : valid/invalid block */
{
nf_spare_block_number[i]--; /* Defect block */
}
else /* Block is valid */
{
/* Determine if 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 */
if (nf_spare_block_number[i] < 4)
return KO;
}
else
{
/* Determine if the block is the look up table */
if (byte_6 == 0xE8) /* look up table ? */
{
lut_is_present |= (0x01) << i;
nf_lut_block[i] = gl_address >> 5;
}
/* Determine the last physical used block */
if ((byte_6 & 0xF8) == 0x10) /* Used block */
{
last_physical_used_block[i] = gl_address >> 5;
}
}
}
gl_address += 32;
}
}
for (i = 0; i < NF_ZONE_MAX_CPT; i++)
{ /* Determine the index for each correct lut */
if ((lut_is_present & (0x01 << i)))
{
gl_address = (Uint32)(nf_lut_block[i]) << 5;
do
{
Nf_wait_busy();
Nf_read_open_C_area(gl_address, 0x06);
nf_lut_index[i]++;
gl_address+=4;
}
while (Nf_rd_byte() == 0xE8);
nf_lut_index[i]-=2;
gl_address = gl_address - 8;
Nf_read_open_C_area(gl_address, 0x00);
if (Nf_rd_byte() != 0xFF) /* LUT has been modified */
{
nf_block_erase(gl_address);
lut_is_present &= ~((0x01) << i); /* Reset bit */
nf_lut_index[i] = 0;
}
}
}
/*****************************************************************/
/* Find free physical block for LUT for each zone */
/*****************************************************************/
for (i = 0; i < NF_ZONE_MAX_CPT; i++)
{
if (!(lut_is_present & (0x01 << i)))
{
block = last_physical_used_block[i];
start = (Uint16)(i) << 10; /* starting value for each zone */
j = 0;
if (block == start) /* starting block for scan */
{
block = start + 1023;
}
block_valid = FALSE; /* init flag block valid */
Nf_wait_busy();
do
{
gl_address = (Uint32)(block) << 5;
Nf_read_open_C_area(gl_address, 0x05);
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--;
}
}
j++;
}
while ((!block_valid ) && (j < 1024));
if (j == 1024)
return KO;
nf_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_CPT; nf_zone++) /* for each zone */
{
half_page = 0;
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]);
gl_address = (Uint32)(nf_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_read_open_C_area(temp_address, 0x05);
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 (j = 0; j <= 0xFE; j += 2)
{
if (gl_buffer[j] == 0xFF)
{
do /* Search free physical block */
{
temp_address += 32;
if (temp_address >= ((Uint32)(nf_zone + 1) << 15))
temp_address = (Uint32)(nf_zone) << 15;
Nf_read_open_C_area(temp_address, 0x05);
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[j] = (free_bloc_pos >> 8) | 0x80;
gl_buffer[j + 1] = free_bloc_pos;
}
}
if (half_page == 0)
{
Nf_write_open_A_area(gl_address, 0x00); /* Write first part of LUT */
nf_download_buffer(); /* Write buffer */
Nf_send_command(NF_PAGE_PROGRAM_CMD); /* Launch programmation */
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