예제 #1
0
/******************************************************************************
 * Writes a 16 bit word to a given offset in the EEPROM.
 *
 * hw - Struct containing variables accessed by shared code
 * reg - offset within the EEPROM to be written to
 * data - 16 bit word to be written to the EEPROM
 *
 * If ixgb_update_eeprom_checksum is not called after this function, the
 * EEPROM will most likely contain an invalid checksum.
 *
 *****************************************************************************/
void
ixgb_write_eeprom(struct ixgb_hw *hw, u16 offset, u16 data)
{
	struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom;

	/* Prepare the EEPROM for writing */
	ixgb_setup_eeprom(hw);

	/*  Send the 9-bit EWEN (write enable) command to the EEPROM (5-bit opcode
	 *  plus 4-bit dummy).  This puts the EEPROM into write/erase mode.
	 */
	ixgb_shift_out_bits(hw, EEPROM_EWEN_OPCODE, 5);
	ixgb_shift_out_bits(hw, 0, 4);

	/*  Prepare the EEPROM  */
	ixgb_standby_eeprom(hw);

	/*  Send the Write command (3-bit opcode + 6-bit addr)  */
	ixgb_shift_out_bits(hw, EEPROM_WRITE_OPCODE, 3);
	ixgb_shift_out_bits(hw, offset, 6);

	/*  Send the data  */
	ixgb_shift_out_bits(hw, data, 16);

	ixgb_wait_eeprom_command(hw);

	/*  Recover from write  */
	ixgb_standby_eeprom(hw);

	/* Send the 9-bit EWDS (write disable) command to the EEPROM (5-bit
	 * opcode plus 4-bit dummy).  This takes the EEPROM out of write/erase
	 * mode.
	 */
	ixgb_shift_out_bits(hw, EEPROM_EWDS_OPCODE, 5);
	ixgb_shift_out_bits(hw, 0, 4);

	/*  Done with writing  */
	ixgb_cleanup_eeprom(hw);

	/* clear the init_ctrl_reg_1 to signify that the cache is invalidated */
	ee_map->init_ctrl_reg_1 = cpu_to_le16(EEPROM_ICW1_SIGNATURE_CLEAR);

	return;
}
예제 #2
0
/******************************************************************************
 * Writes a 16 bit word to a given offset in the EEPROM.
 *
 * hw - Struct containing variables accessed by shared code
 * reg - offset within the EEPROM to be written to
 * data - 16 bit word to be writen to the EEPROM
 *
 * If ixgb_update_eeprom_checksum is not called after this function, the
 * EEPROM will most likely contain an invalid checksum.
 *
 *****************************************************************************/
void
ixgb_write_eeprom(struct ixgb_hw *hw,
                   uint16_t offset,
                   uint16_t data)
{
    /*  Prepare the EEPROM for writing  */
    ixgb_setup_eeprom(hw);

    /*  Send the 9-bit EWEN (write enable) command to the EEPROM (5-bit opcode
     *  plus 4-bit dummy).  This puts the EEPROM into write/erase mode.
     */
    ixgb_shift_out_bits(hw, EEPROM_EWEN_OPCODE, 5);
    ixgb_shift_out_bits(hw, 0, 4);

    /*  Prepare the EEPROM  */
    ixgb_standby_eeprom(hw);

    /*  Send the Write command (3-bit opcode + 6-bit addr)  */
    ixgb_shift_out_bits(hw, EEPROM_WRITE_OPCODE, 3);
    ixgb_shift_out_bits(hw, offset, 6);

    /*  Send the data  */
    ixgb_shift_out_bits(hw, data, 16);

    ixgb_wait_eeprom_command(hw);

    /*  Recover from write  */
    ixgb_standby_eeprom(hw);

    /* Send the 9-bit EWDS (write disable) command to the EEPROM (5-bit
     * opcode plus 4-bit dummy).  This takes the EEPROM out of write/erase
     * mode.
     */
    ixgb_shift_out_bits(hw, EEPROM_EWDS_OPCODE, 5);
    ixgb_shift_out_bits(hw, 0, 4);

    /*  Done with writing  */
    ixgb_cleanup_eeprom(hw);

    return;
}