eeprom.c
上传用户:aoeyumen
上传日期:2007-01-06
资源大小:3329k
文件大小:3k
- /*
- **********************************************************************
- *
- * Copyright 1999, 2000 Creative Labs, Inc.
- *
- **********************************************************************
- *
- * Date Author Summary of changes
- * ---- ------ ------------------
- * October 20, 1999 Andrew de Quincey Rewrote and extended
- * Lucien Murray-Pitts original incomplete
- * driver.
- *
- * April 18, 1999 Andrew Veliath Original Driver
- * implementation
- *
- **********************************************************************
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
- * USA.
- *
- **********************************************************************
- */
- /**
- *
- * Overall driver for the Creative DXR2 card
- * Functions for accessing the Atmel Serial EEPROM
- *
- */
- #include <linux/delay.h>
- #include <dxr2.h>
- #include <vxp524.h>
- #include "eeprom.h"
- /**
- *
- * Read a byte from the EEPROM
- *
- * @param instance VXP524 instance to use
- * @param addr Addresst to read from
- *
- * @return value (>=0) on success, or error (<0)
- *
- */
- extern int dxr2_eeprom_read_byte(vxp524_t* instance, int addr)
- {
- return(vxp524_i2c_read_reg(instance, EEPROM_CHIPID, addr));
- }
- /**
- *
- * Read a byte from the EEPROM
- *
- * @param instance VXP524 instance to use
- * @param addr Addresst to use
- * @param val Value to write
- *
- * @return 0 on success, or <0 on error
- *
- */
- extern int dxr2_eeprom_write_byte(vxp524_t* instance, int addr, int val)
- {
- int status;
- // write register
- status = vxp524_i2c_write_reg(instance, EEPROM_CHIPID, addr, val);
- // wait a bit.. eeprom seems to need a bit of time to recover
- udelay(1000);
- // return status
- return(status);
- }
-
-