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);
}
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);
}
