1 /* 2 * arch/mips/pmc-sierra/yosemite/atmel_read_eeprom.c 3 * 4 * Copyright (C) 2003 PMC-Sierra Inc. 5 * Author: Manish Lachwani (lachwani@pmc-sierra.com) 6 * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org) 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 16 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 19 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 * 24 * You should have received a copy of the GNU General Public License along 25 * with this program; if not, write to the Free Software Foundation, Inc., 26 * 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 /* 30 * Header file for atmel_read_eeprom.c 31 */ 32 33 #include <linux/types.h> 34 #include <linux/pci.h> 35 #include <linux/kernel.h> 36 #include <linux/slab.h> 37 #include <asm/pci.h> 38 #include <asm/io.h> 39 #include <linux/init.h> 40 #include <asm/termios.h> 41 #include <asm/ioctls.h> 42 #include <linux/ioctl.h> 43 #include <linux/fcntl.h> 44 45 #define DEFAULT_PORT "/dev/ttyS0" /* Port to open */ 46 #define TXX 0 /* Dummy loop for spinning */ 47 48 #define BLOCK_SEL 0x00 49 #define SLAVE_ADDR 0xa0 50 #define READ_BIT 0x01 51 #define WRITE_BIT 0x00 52 #define R_HEADER SLAVE_ADDR + BLOCK_SEL + READ_BIT 53 #define W_HEADER SLAVE_ADDR + BLOCK_SEL + WRITE_BIT 54 55 /* 56 * Clock, Voltages and Data 57 */ 58 #define vcc_off (ioctl(fd, TIOCSBRK, 0)) 59 #define vcc_on (ioctl(fd, TIOCCBRK, 0)) 60 #define sda_hi (ioctl(fd, TIOCMBIS, &dtr)) 61 #define sda_lo (ioctl(fd, TIOCMBIC, &dtr)) 62 #define scl_lo (ioctl(fd, TIOCMBIC, &rts)) 63 #define scl_hi (ioctl(fd, TIOCMBIS, &rts)) 64 65 const char rts = TIOCM_RTS; 66 const char dtr = TIOCM_DTR; 67 int fd; 68 69