drivers/staging/comedi/drivers/addi-data/addi_amcc_S5920.c

   1 /**
   2 @verbatim
   3
   4 Copyright (C) 2004,2005  ADDI-DATA GmbH for the source code of this module.
   5
   6         ADDI-DATA GmbH
   7         Dieselstrasse 3
   8         D-77833 Ottersweier
   9         Tel: +19(0)7223/9493-0
  10         Fax: +49(0)7223/9493-92
  11         http://www.addi-data.com
  12         info@addi-data.com
  13
  14 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
  15
  16 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19
  20 You should also find the complete GPL in the COPYING file accompanying this source code.
  21
  22 @endverbatim
  23 */
  24 /*
  25   +-----------------------------------------------------------------------+
  26   | (C) ADDI-DATA GmbH          Dieselstraße 3       D-77833 Ottersweier  |
  27   +-----------------------------------------------------------------------+
  28   | Tel : +49 (0) 7223/9493-0     | email    : info@addi-data.com         |
  29   | Fax : +49 (0) 7223/9493-92    | Internet : http://www.addi-data.com   |
  30   +-------------------------------+---------------------------------------+
  31   | Project : ADDI HEADER READ WRITER |     Compiler   : Visual C++       |
  32   | Module name : S5920.cpp           |     Version    : 6.0              |
  33   +-------------------------------+---------------------------------------+
  34   | Author : E. LIBS                      Date : 02/05/2002               |
  35   +-----------------------------------------------------------------------+
  36   | Description   : DLL with the S5920 PCI Controller functions           |
  37   +-----------------------------------------------------------------------+
  38   |                             UPDATE'S                                  |
  39   +-----------------------------------------------------------------------+
  40   |   Date   |   Author  |          Description of updates                |
  41   +----------+-----------+------------------------------------------------+
  42   | 28/08/02 | LIBS Eric | Add return codes each time a function of the   |
  43   |          |           | Addi Library is called                         |
  44   +-----------------------------------------------------------------------+
  45   | 31/07/03 | KRAUTH J. | Changes for the MSX-Box                        |
  46   +-----------------------------------------------------------------------+
  47 */
  48
  49 #include "addi_amcc_S5920.h"
  50
  51 /*+----------------------------------------------------------------------------+*/
  52 /*| Function   Name   : int i_AddiHeaderRW_ReadEeprom                          |*/
  53 /*|                               (int    i_NbOfWordsToRead,                   |*/
  54 /*|                                unsigned int dw_PCIBoardEepromAddress,             |*/
  55 /*|                                unsigned short   w_EepromStartAddress,                |*/
  56 /*|                                unsigned short * pw_DataRead)                          |*/
  57 /*+----------------------------------------------------------------------------+*/
  58 /*| Task              : Read word from the 5920 eeprom.                        |*/
  59 /*+----------------------------------------------------------------------------+*/
  60 /*| Input Parameters  : int    i_NbOfWordsToRead : Nbr. of word to read        |*/
  61 /*|                     unsigned int dw_PCIBoardEepromAddress : Address of the eeprom |*/
  62 /*|                     unsigned short   w_EepromStartAddress : Eeprom strat address     |*/
  63 /*+----------------------------------------------------------------------------+*/
  64 /*| Output Parameters : unsigned short * pw_DataRead : Read data                          |*/
  65 /*+----------------------------------------------------------------------------+*/
  66 /*| Return Value      : -                                                      |*/
  67 /*+----------------------------------------------------------------------------+*/
  68
  69 int i_AddiHeaderRW_ReadEeprom(int i_NbOfWordsToRead,
  70         unsigned int dw_PCIBoardEepromAddress,
  71         unsigned short w_EepromStartAddress, unsigned short *pw_DataRead)
  72 {
  73         unsigned int dw_eeprom_busy = 0;
  74         int i_Counter = 0;
  75         int i_WordCounter;
  76         int i;
  77         unsigned char pb_ReadByte[1];
  78         unsigned char b_ReadLowByte = 0;
  79         unsigned char b_ReadHighByte = 0;
  80         unsigned char b_SelectedAddressLow = 0;
  81         unsigned char b_SelectedAddressHigh = 0;
  82         unsigned short w_ReadWord = 0;
  83
  84         for (i_WordCounter = 0; i_WordCounter < i_NbOfWordsToRead;
  85                 i_WordCounter++) {
  86                 do {
  87                         dw_eeprom_busy =
  88                                 inl(dw_PCIBoardEepromAddress +
  89                                 AMCC_OP_REG_MCSR);
  90                         dw_eeprom_busy = dw_eeprom_busy & EEPROM_BUSY;
  91                 } while (dw_eeprom_busy == EEPROM_BUSY);
  92
  93                 for (i_Counter = 0; i_Counter < 2; i_Counter++) {
  94                         b_SelectedAddressLow = (w_EepromStartAddress + i_Counter) % 256;        /* Read the low 8 bit part */
  95                         b_SelectedAddressHigh = (w_EepromStartAddress + i_Counter) / 256;       /* Read the high 8 bit part */
  96
  97                         /* Select the load low address mode */
  98                         outb(NVCMD_LOAD_LOW,
  99                                 dw_PCIBoardEepromAddress + AMCC_OP_REG_MCSR +
 100                                 3);
 101
 102                         /* Wait on busy */
 103                         do {
 104                                 dw_eeprom_busy =
 105                                         inl(dw_PCIBoardEepromAddress +
 106                                         AMCC_OP_REG_MCSR);
 107                                 dw_eeprom_busy = dw_eeprom_busy & EEPROM_BUSY;
 108                         } while (dw_eeprom_busy == EEPROM_BUSY);
 109
 110                         /* Load the low address */
 111                         outb(b_SelectedAddressLow,
 112                                 dw_PCIBoardEepromAddress + AMCC_OP_REG_MCSR +
 113                                 2);
 114
 115                         /* Wait on busy */
 116                         do {
 117                                 dw_eeprom_busy =
 118                                         inl(dw_PCIBoardEepromAddress +
 119                                         AMCC_OP_REG_MCSR);
 120                                 dw_eeprom_busy = dw_eeprom_busy & EEPROM_BUSY;
 121                         } while (dw_eeprom_busy == EEPROM_BUSY);
 122
 123                         /* Select the load high address mode */
 124                         outb(NVCMD_LOAD_HIGH,
 125                                 dw_PCIBoardEepromAddress + AMCC_OP_REG_MCSR +
 126                                 3);
 127
 128                         /* Wait on busy */
 129                         do {
 130                                 dw_eeprom_busy =
 131                                         inl(dw_PCIBoardEepromAddress +
 132                                         AMCC_OP_REG_MCSR);
 133                                 dw_eeprom_busy = dw_eeprom_busy & EEPROM_BUSY;
 134                         } while (dw_eeprom_busy == EEPROM_BUSY);
 135
 136                         /* Load the high address */
 137                         outb(b_SelectedAddressHigh,
 138                                 dw_PCIBoardEepromAddress + AMCC_OP_REG_MCSR +
 139                                 2);
 140
 141                         /* Wait on busy */
 142                         do {
 143                                 dw_eeprom_busy =
 144                                         inl(dw_PCIBoardEepromAddress +
 145                                         AMCC_OP_REG_MCSR);
 146                                 dw_eeprom_busy = dw_eeprom_busy & EEPROM_BUSY;
 147                         } while (dw_eeprom_busy == EEPROM_BUSY);
 148
 149                         /* Select the READ mode */
 150                         outb(NVCMD_BEGIN_READ,
 151                                 dw_PCIBoardEepromAddress + AMCC_OP_REG_MCSR +
 152                                 3);
 153
 154                         /* Wait on busy */
 155                         do {
 156                                 dw_eeprom_busy =
 157                                         inl(dw_PCIBoardEepromAddress +
 158                                         AMCC_OP_REG_MCSR);
 159                                 dw_eeprom_busy = dw_eeprom_busy & EEPROM_BUSY;
 160                         } while (dw_eeprom_busy == EEPROM_BUSY);
 161
 162                         /* Read data into the EEPROM */
 163                         *pb_ReadByte =
 164                                 inb(dw_PCIBoardEepromAddress +
 165                                 AMCC_OP_REG_MCSR + 2);
 166
 167                         /* Wait on busy */
 168                         do {
 169                                 dw_eeprom_busy =
 170                                         inl(dw_PCIBoardEepromAddress +
 171                                         AMCC_OP_REG_MCSR);
 172                                 dw_eeprom_busy = dw_eeprom_busy & EEPROM_BUSY;
 173                         } while (dw_eeprom_busy == EEPROM_BUSY);
 174
 175                         /* Select the upper address part */
 176                         if (i_Counter == 0)
 177                                 b_ReadLowByte = pb_ReadByte[0];
 178                         else
 179                                 b_ReadHighByte = pb_ReadByte[0];
 180
 181                         /* Sleep */
 182                         msleep(1);
 183
 184                 }
 185                 w_ReadWord =
 186                         (b_ReadLowByte | (((unsigned short)b_ReadHighByte) *
 187                                 256));
 188
 189                 pw_DataRead[i_WordCounter] = w_ReadWord;
 190
 191                 w_EepromStartAddress += 2;      /*  to read the next word */
 192
 193         }                       /*  for (...) i_NbOfWordsToRead */
 194         return 0;
 195 }