void eeprom_write_byte(unsigned char *addr, unsigned char val)
{
eeprom_write_enable();
eeprom_generic_write(addr, val);
eeprom_write_disable();
}
void eeprom_write_block(const void *buf, void *addr, size_t n)
{
unsigned char *p, *s;
p = (unsigned char *) addr;
s = (unsigned char *) buf;
eeprom_write_enable();
while (n-- > 0)
eeprom_generic_write(p++, *(s++));
eeprom_write_disable();
}
void eeprom_erase_all(void)
{
signed char i;
unsigned short cmd;
eeprom_write_enable();
eeprom_enable();
cmd = 0x0900;
for (i = 11; i >= 0; --i)
eeprom_pulse(EEPROM_MASK(cmd, bitmask[i]));
eeprom_disable();
eeprom_enable();
while (EEPROM_DO == 0);
eeprom_disable();
eeprom_write_disable();
}
void eeprom_erase(unsigned char *addr)
{
signed char i;
unsigned short cmd;
eeprom_write_enable();
eeprom_enable();
cmd = 0x0e00 | (size_t) addr;
for (i = 11; i >= 0; --i)
eeprom_pulse(EEPROM_MASK(cmd, bitmask[i]));
eeprom_disable();
eeprom_enable();
while (EEPROM_DO == 0);
eeprom_disable();
eeprom_write_disable();
}
void eeprom_fill_all(const unsigned char c)
{
signed char i;
unsigned short cmd;
eeprom_write_enable();
eeprom_enable();
cmd = 0x0880;
for (i = 11; i >= 0; --i)
eeprom_pulse(EEPROM_MASK(cmd, bitmask[i]));
for (i = 7; i >= 0; --i)
eeprom_pulse(EEPROM_MASK(c, bitmask[i]));
eeprom_disable();
eeprom_enable();
while (EEPROM_DO == 0);
eeprom_disable();
eeprom_write_disable();
}
/*-------------------------------------------------------------
* Function: int eeprom_write ()
*
* Action: Write data from p_data to the eeprom
*
* Returns: OK if write worked, EEPROM_NOT_RESPONDING if
* write failed.
*-------------------------------------------------------------*/
int eeprom_write (unsigned long pci_base,/* PCI Base address */
int eeprom_addr, /* word offset from start of eeprom */
unsigned short *p_data,/* data source in memory */
int nwords /* number of 16bit words to read */
)
{
int status; /* result code */
int i; /* loop variable */
int check_cntr;
unsigned short data;
/*
* Make sure caller isn't requesting a read beyond the end of the
* eeprom.
*/
if ((eeprom_addr + nwords) > EEPROM_WORD_SIZE)
return (EEPROM_TO_SMALL);
/* enable eeprom writes */
if ((status = eeprom_write_enable(pci_base)) != OK)
return(status);
/* Read in desired number of words */
for (i = 0; i < nwords; i++, eeprom_addr++)
{
/* Select the serial EEPROM */
SELECT_557_EEP(pci_base);
/* Wait CS setup time */
eeprom_delay (SELECT_SETUP_TIME);
/* Send start/write command to begin the read */
if (((status = eeprom_send_start (pci_base, EEPROM_WRITE)) != OK) ||
/* Send address */
((status = eeprom_send_addr (pci_base, eeprom_addr)) != OK))
return (status);
data = *p_data++;
if ((status = eeprom_put_word (pci_base, data)) != OK)
return (status);
/* De-Select the serial EEPROM */
DESELECT_557_EEP(pci_base);
/* wait the required de-select time between commands */
eeprom_delay (DESELECT_TIME);
/* Re-Select the serial EEPROM */
SELECT_557_EEP(pci_base);
/* now that the write command/data have been clocked into the EEPROM
we must wait for the BUSY indicator (DO driven low) to indicate
READY (DO driven high) */
check_cntr = 0;
while (1)
{
check_cntr++;
if (get_sda_line (pci_base) == HIGH) break; /* programming complete */
if (check_cntr > 100000) /* timeout */
{
/* De-Select the serial EEPROM */
DESELECT_557_EEP(pci_base);
/* wait the required de-select time between commands */
eeprom_delay (DESELECT_TIME);
return (EEPROM_ERROR);
}
}
/* De-Select the serial EEPROM */
DESELECT_557_EEP(pci_base);
/* wait the required de-select time between commands */
eeprom_delay (DESELECT_TIME);
}
/* disable eeprom writes */
if ((status = eeprom_write_disable(pci_base)) != OK)
return(status);
return (OK);
}
