include/linux/eeprom_93cx6.h

   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  */
  46 struct 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
  61 extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
  62         const u8 word, u16 *data);
  63 extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
  64         const u8 word, __le16 *data, const u16 words);
  65 extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom,
  66         const u8 byte, u8 *data);
  67 extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom,
  68         const u8 byte, u8 *data, const u16 bytes);
  69
  70 extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
  71
  72 extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
  73                                u8 addr, u16 data);