linux/include/linux/eeprom_93cx6.h
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   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_93C86  8
  34#define PCI_EEPROM_WIDTH_OPCODE 3
  35#define PCI_EEPROM_WRITE_OPCODE 0x05
  36#define PCI_EEPROM_ERASE_OPCODE 0x07
  37#define PCI_EEPROM_READ_OPCODE  0x06
  38#define PCI_EEPROM_EWDS_OPCODE  0x10
  39#define PCI_EEPROM_EWEN_OPCODE  0x13
  40
  41/**
  42 * struct eeprom_93cx6 - control structure for setting the commands
  43 * for reading the eeprom data.
  44 * @data: private pointer for the driver.
  45 * @register_read(struct eeprom_93cx6 *eeprom): handler to
  46 * read the eeprom register, this function should set all reg_* fields.
  47 * @register_write(struct eeprom_93cx6 *eeprom): handler to
  48 * write to the eeprom register by using all reg_* fields.
  49 * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines
  50 * @drive_data: Set if we're driving the data line.
  51 * @reg_data_in: register field to indicate data input
  52 * @reg_data_out: register field to indicate data output
  53 * @reg_data_clock: register field to set the data clock
  54 * @reg_chip_select: register field to set the chip select
  55 *
  56 * This structure is used for the communication between the driver
  57 * and the eeprom_93cx6 handlers for reading the eeprom.
  58 */
  59struct eeprom_93cx6 {
  60        void *data;
  61
  62        void (*register_read)(struct eeprom_93cx6 *eeprom);
  63        void (*register_write)(struct eeprom_93cx6 *eeprom);
  64
  65        int width;
  66
  67        char drive_data;
  68        char reg_data_in;
  69        char reg_data_out;
  70        char reg_data_clock;
  71        char reg_chip_select;
  72};
  73
  74extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
  75        const u8 word, u16 *data);
  76extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
  77        const u8 word, __le16 *data, const u16 words);
  78
  79extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
  80
  81extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
  82                               u8 addr, u16 data);
  83
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