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annotate packages/io/flash/current/src/flashiodev.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children a2dfa8bf3c57
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1 //==========================================================================
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2 //
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3 // flashiodev.c
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4 //
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5 // Flash device interface to I/O subsystem
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6 //
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7 //==========================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): jlarmour
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44 // Contributors:
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45 // Date: 2002-01-16
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46 // Purpose:
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47 // Description:
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //==========================================================================
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52
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53 #define _FLASH_PRIVATE_
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54 #include <pkgconf/io_flash.h>
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55
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56 #include <errno.h>
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57 #include <cyg/infra/cyg_type.h>
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58 #include <cyg/io/devtab.h>
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59 #include <cyg/io/config_keys.h>
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60 #include <cyg/io/flash.h>
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61 #include <string.h> // memcpy
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62
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63 #define MIN(x,y) ((x)<(y) ? (x) : (y))
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64
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65 // 1 per devtab entry, so only 1 for now
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66 static char flashiodev_workspaces[1][FLASH_MIN_WORKSPACE];
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67
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68 static int dummy_printf( const char *fmt, ... ) {return 0;}
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69
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70 static bool
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71 flashiodev_init( struct cyg_devtab_entry *tab )
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72 {
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73 char *ws = (char *)tab->priv;
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74 int stat = flash_init( ws, FLASH_MIN_WORKSPACE, &dummy_printf );
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75
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76 if ( stat == 0 )
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77 return true;
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78 else
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79 return false;
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80 } // flashiodev_init()
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81
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82 #if 0
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83 static Cyg_ErrNo
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84 flashiodev_lookup( struct cyg_devtab_entry **tab,
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85 struct cyg_devtab_entry *sub_tab,
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86 const char *name)
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87 {
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88 } // flashiodev_lookup()
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89 #endif
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90
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91 static Cyg_ErrNo
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92 flashiodev_bread( cyg_io_handle_t handle, void *buf, cyg_uint32 *len,
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93 cyg_uint32 pos)
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94 {
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95 char *startpos = (char *)flash_info.start + pos +
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96 CYGNUM_IO_FLASH_BLOCK_OFFSET_1;
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97
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98 #ifdef CYGPKG_INFRA_DEBUG // don't bother checking this all the time
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99 char *endpos = startpos + *len - 1;
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100 char *flashend = MIN( (char *)flash_info.end,
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101 ((char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 +
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102 CYGNUM_IO_FLASH_BLOCK_LENGTH_1));
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103 if ( startpos < (char *)flash_info.start+CYGNUM_IO_FLASH_BLOCK_OFFSET_1 )
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104 return -EINVAL;
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105 if ( endpos > flashend )
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106 return -EINVAL;
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107 #endif
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108 memcpy( buf, startpos, *len );
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109
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110 return ENOERR;
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111 } // flashiodev_bread()
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112
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113 static Cyg_ErrNo
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114 flashiodev_bwrite( cyg_io_handle_t handle, const void *buf, cyg_uint32 *len,
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115 cyg_uint32 pos )
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116 {
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117 Cyg_ErrNo err = ENOERR;
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118 void *erraddr;
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119
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120 char *startpos = (char *)flash_info.start + pos + CYGNUM_IO_FLASH_BLOCK_OFFSET_1;
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121
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122 #ifdef CYGPKG_INFRA_DEBUG // don't bother checking this all the time
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123 char *endpos = startpos + *len - 1;
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124 char *flashend = MIN( (char *)flash_info.end,
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125 ((char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 +
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126 CYGNUM_IO_FLASH_BLOCK_LENGTH_1));
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127 if ( startpos < (char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 )
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128 return -EINVAL;
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129 if ( endpos > flashend )
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130 return -EINVAL;
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131 #endif
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132 err = flash_program( startpos,
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133 (void *)buf, *len, &erraddr );
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134
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135 if ( err )
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136 err = -EIO; // just something sane
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137 return err;
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138 } // flashiodev_bwrite()
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139
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140 static Cyg_ErrNo
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141 flashiodev_get_config( cyg_io_handle_t handle,
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142 cyg_uint32 key,
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143 void* buf,
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144 cyg_uint32* len)
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145 {
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146 switch (key) {
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147 case CYG_IO_GET_CONFIG_FLASH_ERASE:
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148 {
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149 if ( *len != sizeof( cyg_io_flash_getconfig_erase_t ) )
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150 return -EINVAL;
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151 {
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152 cyg_io_flash_getconfig_erase_t *e =
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153 (cyg_io_flash_getconfig_erase_t *)buf;
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154 char *startpos = (char *)flash_info.start + e->offset + CYGNUM_IO_FLASH_BLOCK_OFFSET_1;
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155
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156 #ifdef CYGPKG_INFRA_DEBUG // don't bother checking this all the time
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157 char *endpos = startpos + e->len - 1;
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158 char *flashend = MIN( (char *)flash_info.end,
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159 ((char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 +
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160 CYGNUM_IO_FLASH_BLOCK_LENGTH_1));
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161 if ( startpos < (char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 )
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162 return -EINVAL;
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163 if ( endpos > flashend )
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164 return -EINVAL;
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165 #endif
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166 e->flasherr = flash_erase( startpos, e->len, e->err_address );
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167 }
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168 return ENOERR;
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169 }
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170 case CYG_IO_GET_CONFIG_FLASH_DEVSIZE:
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171 {
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172 if ( *len != sizeof( cyg_io_flash_getconfig_devsize_t ) )
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173 return -EINVAL;
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174 {
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175 cyg_io_flash_getconfig_devsize_t *d =
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176 (cyg_io_flash_getconfig_devsize_t *)buf;
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177
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178 //d->dev_size = flash_info.blocks * flash_info.block_size;
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179 d->dev_size = CYGNUM_IO_FLASH_BLOCK_LENGTH_1;
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180 }
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181 return ENOERR;
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182 }
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183
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184 case CYG_IO_GET_CONFIG_FLASH_BLOCKSIZE:
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185 {
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186 cyg_io_flash_getconfig_blocksize_t *b =
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187 (cyg_io_flash_getconfig_blocksize_t *)buf;
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188 char *startpos = (char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 + b->offset;
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189 #ifdef CYGPKG_INFRA_DEBUG // don't bother checking this all the time
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190 char *flashend = MIN( (char *)flash_info.end,
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191 ((char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 +
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192 CYGNUM_IO_FLASH_BLOCK_LENGTH_1));
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193 if ( startpos < (char *)flash_info.start + CYGNUM_IO_FLASH_BLOCK_OFFSET_1 )
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194 return -EINVAL;
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195 if ( startpos > flashend )
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196 return -EINVAL;
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197 #endif
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198 if ( *len != sizeof( cyg_io_flash_getconfig_blocksize_t ) )
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199 return -EINVAL;
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200
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201 // offset unused for now
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202 b->block_size = flash_info.block_size;
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203 return ENOERR;
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204 }
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205
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206 default:
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207 return -EINVAL;
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208 }
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209 } // flashiodev_get_config()
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210
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211 #if 0
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212 static Cyg_ErrNo
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213 flashiodev_set_config( cyg_io_handle_t handle,
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214 cyg_uint32 key,
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215 const void* buf,
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216 cyg_uint32* len)
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217 {
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218 switch (key) {
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219 default:
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220 return -EINVAL;
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221 }
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222 } // flashiodev_set_config()
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223 #endif
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224
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225 // get_config/set_config should be added later to provide the other flash
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226 // operations possible, like erase etc.
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227
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228 BLOCK_DEVIO_TABLE( cyg_io_flashdev1_ops,
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229 &flashiodev_bwrite,
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230 &flashiodev_bread,
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231 0, // no select
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232 &flashiodev_get_config,
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233 0 // &flashiodev_set_config
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234 );
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235
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236
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237 BLOCK_DEVTAB_ENTRY( cyg_io_flashdev1,
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238 CYGDAT_IO_FLASH_BLOCK_DEVICE_NAME_1,
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239 0,
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240 &cyg_io_flashdev1_ops,
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241 &flashiodev_init,
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242 0, // No lookup required
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243 &flashiodev_workspaces[0] );
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244
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245 // EOF flashiodev.c