include/linux/eeprom_93cx6.h

   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  */
  59 struct 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
  74 extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
  75         const u8 word, u16 *data);
  76 extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
  77         const u8 word, __le16 *data, const u16 words);
  78
  79 extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
  80
  81 extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
  82                                u8 addr, u16 data);