LXR linux/include/linux/eeprom

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3        Copyright (C) 2004 - 2006 rt2x00 SourceForge Project
   4        <http://rt2x00.serialmonkey.com>
   5
   6 */
   7
   8/*
   9        Module: eeprom_93cx6
  10        Abstract: EEPROM reader datastructures for 93cx6 chipsets.
  11        Supported chipsets: 93c46, 93c56 and 93c66.
  12 */
  13
  14/*
  15 * EEPROM operation defines.
  16 */
  17#define PCI_EEPROM_WIDTH_93C46  6
  18#define PCI_EEPROM_WIDTH_93C56  8
  19#define PCI_EEPROM_WIDTH_93C66  8
  20#define PCI_EEPROM_WIDTH_93C86  8
  21#define PCI_EEPROM_WIDTH_OPCODE 3
  22#define PCI_EEPROM_WRITE_OPCODE 0x05
  23#define PCI_EEPROM_ERASE_OPCODE 0x07
  24#define PCI_EEPROM_READ_OPCODE  0x06
  25#define PCI_EEPROM_EWDS_OPCODE  0x10
  26#define PCI_EEPROM_EWEN_OPCODE  0x13
  27
  28/**
  29 * struct eeprom_93cx6 - control structure for setting the commands
  30 * for reading the eeprom data.
  31 * @data: private pointer for the driver.
  32 * @register_read(struct eeprom_93cx6 *eeprom): handler to
  33 * read the eeprom register, this function should set all reg_* fields.
  34 * @register_write(struct eeprom_93cx6 *eeprom): handler to
  35 * write to the eeprom register by using all reg_* fields.
  36 * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines
  37 * @drive_data: Set if we're driving the data line.
  38 * @reg_data_in: register field to indicate data input
  39 * @reg_data_out: register field to indicate data output
  40 * @reg_data_clock: register field to set the data clock
  41 * @reg_chip_select: register field to set the chip select
  42 *
  43 * This structure is used for the communication between the driver
  44 * and the eeprom_93cx6 handlers for reading the eeprom.
  45 */
  46struct eeprom_93cx6 {
  47        void *data;
  48
  49        void (*register_read)(struct eeprom_93cx6 *eeprom);
  50        void (*register_write)(struct eeprom_93cx6 *eeprom);
  51
  52        int width;
  53
  54        char drive_data;
  55        char reg_data_in;
  56        char reg_data_out;
  57        char reg_data_clock;
  58        char reg_chip_select;
  59};
  60
  61extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
  62        const u8 word, u16 *data);
  63extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
  64        const u8 word, __le16 *data, const u16 words);
  65extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom,
  66        const u8 byte, u8 *data);
  67extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom,
  68        const u8 byte, u8 *data, const u16 bytes);
  69
  70extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
  71
  72extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
  73                               u8 addr, u16 data);
  74