LXR linux/include/linux/eeprom

   1/*
   2        Copyright (C) 2004 - 2006 rt2x00 SourceForge Project
   3        <http://rt2x00.serialmonkey.com>
   4
   5        This program is free software; you can redistribute it and/or modify
   6        it under the terms of the GNU General Public License as published by
   7        the Free Software Foundation; either version 2 of the License, or
   8        (at your option) any later version.
   9
  10        This program is distributed in the hope that it will be useful,
  11        but WITHOUT ANY WARRANTY; without even the implied warranty of
  12        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13        GNU General Public License for more details.
  14
  15        You should have received a copy of the GNU General Public License
  16        along with this program; if not, write to the
  17        Free Software Foundation, Inc.,
  18        59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19 */
  20
  21/*
  22        Module: eeprom_93cx6
  23        Abstract: EEPROM reader datastructures for 93cx6 chipsets.
  24        Supported chipsets: 93c46, 93c56 and 93c66.
  25 */
  26
  27/*
  28 * EEPROM operation defines.
  29 */
  30#define PCI_EEPROM_WIDTH_93C46  6
  31#define PCI_EEPROM_WIDTH_93C56  8
  32#define PCI_EEPROM_WIDTH_93C66  8
  33#define PCI_EEPROM_WIDTH_OPCODE 3
  34#define PCI_EEPROM_WRITE_OPCODE 0x05
  35#define PCI_EEPROM_READ_OPCODE  0x06
  36#define PCI_EEPROM_EWDS_OPCODE  0x10
  37#define PCI_EEPROM_EWEN_OPCODE  0x13
  38
  39/**
  40 * struct eeprom_93cx6 - control structure for setting the commands
  41 * for reading the eeprom data.
  42 * @data: private pointer for the driver.
  43 * @register_read(struct eeprom_93cx6 *eeprom): handler to
  44 * read the eeprom register, this function should set all reg_* fields.
  45 * @register_write(struct eeprom_93cx6 *eeprom): handler to
  46 * write to the eeprom register by using all reg_* fields.
  47 * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines
  48 * @reg_data_in: register field to indicate data input
  49 * @reg_data_out: register field to indicate data output
  50 * @reg_data_clock: register field to set the data clock
  51 * @reg_chip_select: register field to set the chip select
  52 *
  53 * This structure is used for the communication between the driver
  54 * and the eeprom_93cx6 handlers for reading the eeprom.
  55 */
  56struct eeprom_93cx6 {
  57        void *data;
  58
  59        void (*register_read)(struct eeprom_93cx6 *eeprom);
  60        void (*register_write)(struct eeprom_93cx6 *eeprom);
  61
  62        int width;
  63
  64        char reg_data_in;
  65        char reg_data_out;
  66        char reg_data_clock;
  67        char reg_chip_select;
  68};
  69
  70extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
  71        const u8 word, u16 *data);
  72extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
  73        const u8 word, __le16 *data, const u16 words);
  74