u_int32_t
pmc_eeprom_read (long addr, long mem_offset)
{
u_int32_t data; /* */
if (!ByteReverseBuilt)
BuildByteReverse ();
mem_offset = ByteReverse[0x7F & mem_offset]; /* */
/*
*/
mem_offset <<= 2; /* */
mem_offset |= EPROM_READ; /* */
eeprom_put_byte (addr, mem_offset, SIZE_ADDR_OP); /* */
data = eeprom_get_byte (addr); /* */
pci_write_32 ((u_int32_t *) addr, 0); /*
*/
return (data & 0x000000FF);
}
u_int32_t
pmc_eeprom_read (long addr, long mem_offset)
{
u_int32_t data; /* Data from chip */
if (!ByteReverseBuilt)
BuildByteReverse ();
mem_offset = ByteReverse[0x7F & mem_offset]; /* Reverse address */
/*
* NOTE: The max offset address is 128 or half the reversal table. So the
* LSB is always zero and counts as a built in shift of one bit. So even
* though we need to shift 3 bits to make room for the command, we only
* need to shift twice more because of the built in shift.
*/
mem_offset <<= 2; /* Shift for command */
mem_offset |= EPROM_READ; /* Add command */
eeprom_put_byte (addr, mem_offset, SIZE_ADDR_OP); /* Output chip address */
data = eeprom_get_byte (addr); /* Read chip data */
pci_write_32 ((u_int32_t *) addr, 0); /* Remove Chip Select from
* EEPROM */
return (data & 0x000000FF);
}
int
pmc_eeprom_write (long addr, long mem_offset, u_int32_t data)
{
volatile u_int32_t temp;
int count;
if (!ByteReverseBuilt)
BuildByteReverse ();
mem_offset = ByteReverse[0x7F & mem_offset];
mem_offset <<= 2;
mem_offset |= EPROM_WRITE;
eeprom_put_byte (addr, mem_offset, SIZE_ADDR_OP);
data = ByteReverse[0xFF & data];
eeprom_put_byte (addr, data, NUM_OF_BITS);
pci_write_32 ((u_int32_t *) addr, 0);
pci_write_32 ((u_int32_t *) addr, EPROM_ENCS);
temp = pci_read_32 ((u_int32_t *) addr);
temp = pci_read_32 ((u_int32_t *) addr);
if (temp & EPROM_ACTIVE_IN_BIT)
{
temp = pci_read_32 ((u_int32_t *) addr);
if (temp & EPROM_ACTIVE_IN_BIT)
{
pci_write_32 ((u_int32_t *) addr, 0);
return (1);
}
}
count = 1000;
while (count--)
{
for (temp = 0; temp < 0x10; temp++)
OS_uwait_dummy ();
if (pci_read_32 ((u_int32_t *) addr) & EPROM_ACTIVE_IN_BIT)
break;
}
if (count == -1)
return (2);
return (0);
}
int
pmc_eeprom_write (long addr, long mem_offset, u_int32_t data)
{
volatile u_int32_t temp;
int count;
if (!ByteReverseBuilt)
BuildByteReverse ();
mem_offset = ByteReverse[0x7F & mem_offset]; /* Reverse address */
/*
* NOTE: The max offset address is 128 or half the reversal table. So the
* LSB is always zero and counts as a built in shift of one bit. So even
* though we need to shift 3 bits to make room for the command, we only
* need to shift twice more because of the built in shift.
*/
mem_offset <<= 2; /* Shift for command */
mem_offset |= EPROM_WRITE; /* Add command */
eeprom_put_byte (addr, mem_offset, SIZE_ADDR_OP); /* Output chip address */
data = ByteReverse[0xFF & data];/* Reverse data */
eeprom_put_byte (addr, data, NUM_OF_BITS); /* Output chip data */
pci_write_32 ((u_int32_t *) addr, 0); /* Remove Chip Select from
* EEPROM */
/*
** Must see Data In at a low state before completing this transaction.
**
** Afterwards, the data bit will return to a high state, ~6 ms, terminating
** the operation.
*/
pci_write_32 ((u_int32_t *) addr, EPROM_ENCS); /* Re-enable Chip Select */
temp = pci_read_32 ((u_int32_t *) addr); /* discard first read */
temp = pci_read_32 ((u_int32_t *) addr);
if (temp & EPROM_ACTIVE_IN_BIT)
{
temp = pci_read_32 ((u_int32_t *) addr);
if (temp & EPROM_ACTIVE_IN_BIT)
{
pci_write_32 ((u_int32_t *) addr, 0); /* Remove Chip Select
* from EEPROM */
return (1);
}
}
count = 1000;
while (count--)
{
for (temp = 0; temp < 0x10; temp++)
OS_uwait_dummy ();
if (pci_read_32 ((u_int32_t *) addr) & EPROM_ACTIVE_IN_BIT)
break;
}
if (count == -1)
return (2);
return (0);
}
