Mercurial > flash_v2

annotate packages/io/flash/current/src/flash.c @ 1675:e1d094896914

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Don't check if the flash is write protected before performing a read.
author asl
date Sun, 20 Jun 2004 12:46:16 +0000
parents 707a873489c8
children 3845779eca10
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1 //==========================================================================
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2 //
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3 // flash.c
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4 //
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5 // Flash programming
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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 // Copyright (C) 2003 Gary Thomas
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13 //
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14 // eCos is free software; you can redistribute it and/or modify it under
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15 // the terms of the GNU General Public License as published by the Free
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16 // Software Foundation; either version 2 or (at your option) any later version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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19 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License along
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24 // with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use macros
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28 // or inline functions from this file, or you compile this file and link it
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29 // with other works to produce a work based on this file, this file does not
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30 // by itself cause the resulting work to be covered by the GNU General Public
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31 // License. However the source code for this file must still be made available
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32 // in accordance with section (3) of the GNU General Public License.
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33 //
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34 // This exception does not invalidate any other reasons why a work based on
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35 // this file might be covered by the GNU General Public License.
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36 //
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37 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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38 // at http://sources.redhat.com/ecos/ecos-license/
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39 // -------------------------------------------
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40 //####ECOSGPLCOPYRIGHTEND####
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41 //==========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): gthomas
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45 // Contributors: gthomas
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46 // Date: 2000-07-26
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47 // Purpose:
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48 // Description:
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //==========================================================================
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53
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54 #include <pkgconf/system.h>
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55 #include <pkgconf/io_flash.h>
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56
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57 #include <cyg/hal/hal_arch.h>
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58 #include <cyg/hal/hal_intr.h>
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59 #include <cyg/hal/hal_cache.h>
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60 #include <string.h>
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61
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62 #define _FLASH_PRIVATE_
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63 #include <cyg/io/flash.h>
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64
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65 // When this flag is set, do not actually jump to the relocated code.
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66 // This can be used for running the function in place (RAM startup only),
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67 // allowing calls to diag_printf() and similar.
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68 #undef RAM_FLASH_DEV_DEBUG
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69 #if !defined(CYG_HAL_STARTUP_RAM) && defined(RAM_FLASH_DEV_DEBUG)
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70 # warning "Can only enable the flash debugging when configured for RAM startup"
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71 #endif
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72
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73 struct flash_info flash_info;
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74
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75 // These are the functions in the HW specific driver we need to call.
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76 typedef void code_fun(void*);
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77
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78 externC code_fun flash_query;
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79 externC code_fun flash_erase_block;
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80 externC code_fun flash_program_buf;
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81 externC code_fun flash_read_buf;
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82 externC code_fun flash_lock_block;
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83 externC code_fun flash_unlock_block;
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84
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85 int
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86 flash_init(_printf *pf)
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87 {
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88 int err;
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89
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90 if (flash_info.init) return FLASH_ERR_OK;
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91 flash_info.pf = pf; // Do this before calling into the driver
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92 if ((err = flash_hwr_init()) != FLASH_ERR_OK) {
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93 return err;
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94 }
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95 flash_info.block_mask = ~(flash_info.block_size-1);
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96 flash_info.init = 1;
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97 return FLASH_ERR_OK;
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98 }
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100 // Use this function to make function pointers anonymous - forcing the
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101 // compiler to use jumps instead of branches when calling driver
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102 // services.
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103 static void* __anonymizer(void* p)
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104 {
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105 return p;
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106 }
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108 // FIXME: Want to change all drivers to use this function. But it may
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109 // make sense to wait till device structure pointer arguments get
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110 // added as well.
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111 void
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112 flash_dev_query(void* data)
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113 {
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114 typedef void code_fun(void*);
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115 code_fun *_flash_query;
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116 int d_cache, i_cache;
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117
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118 _flash_query = (code_fun*) __anonymizer(&flash_query);
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119
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120 HAL_FLASH_CACHES_OFF(d_cache, i_cache);
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121 (*_flash_query)(data);
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122 HAL_FLASH_CACHES_ON(d_cache, i_cache);
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123 }
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125 int
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126 flash_verify_addr(void *target)
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127 {
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128 if (!flash_info.init) {
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129 return FLASH_ERR_NOT_INIT;
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130 }
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131 if (((CYG_ADDRESS)target >= (CYG_ADDRESS)flash_info.start) &&
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132 ((CYG_ADDRESS)target <= ( ((CYG_ADDRESS)flash_info.end) - 1) )) {
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133 return FLASH_ERR_OK;
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134 } else {
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135 return FLASH_ERR_INVALID;
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136 }
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137 }
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139 int
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140 flash_get_limits(void *target, void **start, void **end)
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141 {
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142 if (!flash_info.init) {
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143 return FLASH_ERR_NOT_INIT;
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144 }
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145 *start = flash_info.start;
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146 *end = flash_info.end;
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147 return FLASH_ERR_OK;
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148 }
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149
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150 int
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151 flash_get_block_info(int *block_size, int *blocks)
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152 {
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153 if (!flash_info.init) {
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154 return FLASH_ERR_NOT_INIT;
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155 }
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156 *block_size = flash_info.block_size;
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157 *blocks = flash_info.blocks;
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158 return FLASH_ERR_OK;
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159 }
157
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160
115
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161 int
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162 flash_erase(void *addr, int len, void **err_addr)
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163 {
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164 unsigned short *block, *end_addr;
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165 int stat = 0;
151
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166 typedef int code_fun(unsigned short *, unsigned int);
115
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167 code_fun *_flash_erase_block;
141
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168 int d_cache, i_cache;
115
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169
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170 if (!flash_info.init) {
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171 return FLASH_ERR_NOT_INIT;
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172 }
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173
174
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174 #ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
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175 if (plf_flash_query_soft_wp(addr,len))
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176 return FLASH_ERR_PROTECT;
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177 #endif
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178
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179 _flash_erase_block = (code_fun*) __anonymizer(&flash_erase_block);
154
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180
174
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181 block = (unsigned short *)((CYG_ADDRESS)addr & flash_info.block_mask);
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182 end_addr = (unsigned short *)((CYG_ADDRESS)addr+len);
115
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183
208
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184 /* Check to see if end_addr overflowed */
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185 if( (end_addr < block) && (len > 0) ){
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186 end_addr = (unsigned short *) ((CYG_ADDRESS) flash_info.end - 1);
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187 }
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188
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189 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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190 (*flash_info.pf)("... Erase from %p-%p: ", (void*)block, (void*)end_addr);
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191 #endif
115
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192
154
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193 HAL_FLASH_CACHES_OFF(d_cache, i_cache);
156
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194 FLASH_Enable(block, end_addr);
115
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195 while (block < end_addr) {
151
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196 // Supply the blocksize for a gross check for erase success
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197 unsigned short *tmp_block;
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198 #if !defined(CYGSEM_IO_FLASH_READ_INDIRECT)
195
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199 int i;
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200 unsigned char *dp;
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201 bool erased = true;
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202
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203 dp = (unsigned char *)block;
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204 for (i = 0; i < flash_info.block_size; i++) {
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205 if (*dp++ != (unsigned char)0xFF) {
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206 erased = false;
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207 break;
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208 }
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209 }
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210 #else
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211 bool erased = false;
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212 #endif
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213
195
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214 if (!erased) {
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215 stat = (*_flash_erase_block)(block, flash_info.block_size);
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216 stat = flash_hwr_map_error(stat);
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217 }
115
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218 if (stat) {
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219 *err_addr = (void *)block;
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220 break;
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221 }
208
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222
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223 // Check to see if block will overflow
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224 tmp_block = block + flash_info.block_size / sizeof(*block);
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225 if(tmp_block < block){
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226 // If block address overflows, set block value to end on this loop
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227 block = end_addr;
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228 }
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229 else{
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230 block = tmp_block;
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231 }
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232 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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233 (*flash_info.pf)(".");
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234 #endif
115
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235 }
156
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236 FLASH_Disable(block, end_addr);
141
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237 HAL_FLASH_CACHES_ON(d_cache, i_cache);
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238 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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239 (*flash_info.pf)("\n");
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240 #endif
115
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241 return (stat);
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242 }
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243
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244 int
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245 flash_program(void *_addr, void *_data, int len, void **err_addr)
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246 {
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247 int stat = 0;
154
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248 int size;
174
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249 typedef int code_fun(void *, void *, int, unsigned long, int);
115
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250 code_fun *_flash_program_buf;
174
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251 unsigned char *addr = (unsigned char *)_addr;
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252 unsigned char *data = (unsigned char *)_data;
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253 CYG_ADDRESS tmp;
141
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254 int d_cache, i_cache;
115
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255
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256 if (!flash_info.init) {
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257 return FLASH_ERR_NOT_INIT;
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258 }
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259
174
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260 #ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
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261 if (plf_flash_query_soft_wp(addr,len))
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262 return FLASH_ERR_PROTECT;
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263 #endif
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264
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265 _flash_program_buf = (code_fun*) __anonymizer(&flash_program_buf);
154
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266
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267 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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268 (*flash_info.pf)("... Program from %p-%p at %p: ", (void*)data,
174
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269 (void*)(((CYG_ADDRESS)data)+len), (void*)addr);
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270 #endif
154
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271
141
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272 HAL_FLASH_CACHES_OFF(d_cache, i_cache);
174
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273 FLASH_Enable((unsigned short*)addr, (unsigned short *)(addr+len));
115
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274 while (len > 0) {
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275 size = len;
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276 if (size > flash_info.block_size) size = flash_info.block_size;
154
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277
174
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278 tmp = (CYG_ADDRESS)addr & ~flash_info.block_mask;
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279 if (tmp) {
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280 tmp = flash_info.block_size - tmp;
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281 if (size>tmp) size = tmp;
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282
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283 }
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284
156
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285 stat = (*_flash_program_buf)(addr, data, size,
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286 flash_info.block_mask, flash_info.buffer_size);
115
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287 stat = flash_hwr_map_error(stat);
157
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288 #ifdef CYGSEM_IO_FLASH_VERIFY_PROGRAM
163
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289 if (0 == stat) // Claims to be OK
195
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290 if (memcmp(addr, data, size) != 0) {
163
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291 stat = 0x0BAD;
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292 #ifdef CYGSEM_IO_FLASH_CHATTER
163
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293 (*flash_info.pf)("V");
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294 #endif
163
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295 }
157
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296 #endif
115
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297 if (stat) {
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298 *err_addr = (void *)addr;
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299 break;
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300 }
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301 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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302 (*flash_info.pf)(".");
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303 #endif
115
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304 len -= size;
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305 addr += size/sizeof(*addr);
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306 data += size/sizeof(*data);
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307 }
174
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308 FLASH_Disable((unsigned short*)addr, (unsigned short *)(addr+len));
141
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309 HAL_FLASH_CACHES_ON(d_cache, i_cache);
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310 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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311 (*flash_info.pf)("\n");
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312 #endif
115
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313 return (stat);
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314 }
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315
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316 int
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317 flash_read(void *_addr, void *_data, int len, void **err_addr)
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318 {
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319 #ifdef CYGSEM_IO_FLASH_READ_INDIRECT
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320 int stat = 0;
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321 int size;
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322 typedef int code_fun(void *, void *, int, unsigned long, int);
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323 code_fun *_flash_read_buf;
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324 unsigned char *addr = (unsigned char *)_addr;
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325 unsigned char *data = (unsigned char *)_data;
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326 CYG_ADDRESS tmp;
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327 int d_cache, i_cache;
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328
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329 if (!flash_info.init) {
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330 return FLASH_ERR_NOT_INIT;
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331 }
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332
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333 _flash_read_buf = (code_fun*) __anonymizer(&flash_read_buf);
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334
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335 #ifdef CYGSEM_IO_FLASH_CHATTER
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336 (*flash_info.pf)("... Read from %p-%p at %p: ", (void*)data,
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337 (void*)(((CYG_ADDRESS)data)+len), (void*)addr);
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338 #endif
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339
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340 HAL_FLASH_CACHES_OFF(d_cache, i_cache);
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341 FLASH_Enable((unsigned short*)addr, (unsigned short *)(addr+len));
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342 while (len > 0) {
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343 size = len;
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344 if (size > flash_info.block_size) size = flash_info.block_size;
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345
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346 tmp = (CYG_ADDRESS)addr & ~flash_info.block_mask;
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347 if (tmp) {
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348 tmp = flash_info.block_size - tmp;
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349 if (size>tmp) size = tmp;
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350
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351 }
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352
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353 stat = (*_flash_read_buf)(addr, data, size,
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354 flash_info.block_mask, flash_info.buffer_size);
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355 stat = flash_hwr_map_error(stat);
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356 #ifdef CYGSEM_IO_FLASH_VERIFY_PROGRAM_
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357 if (0 == stat) // Claims to be OK
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358 if (memcmp(addr, data, size) != 0) {
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359 stat = 0x0BAD;
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360 #ifdef CYGSEM_IO_FLASH_CHATTER
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361 (*flash_info.pf)("V");
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362 #endif
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363 }
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364 #endif
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365 if (stat) {
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366 *err_addr = (void *)addr;
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367 break;
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368 }
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369 #ifdef CYGSEM_IO_FLASH_CHATTER
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370 (*flash_info.pf)(".");
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371 #endif
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372 len -= size;
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373 addr += size/sizeof(*addr);
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374 data += size/sizeof(*data);
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375 }
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376 FLASH_Disable((unsigned short*)addr, (unsigned short *)(addr+len));
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377 HAL_FLASH_CACHES_ON(d_cache, i_cache);
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378 #ifdef CYGSEM_IO_FLASH_CHATTER
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379 (*flash_info.pf)("\n");
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380 #endif
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381 return (stat);
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382 #else // CYGSEM_IO_FLASH_READ_INDIRECT
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383 // Direct access to FLASH memory is possible - just move the requested bytes
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384 if (!flash_info.init) {
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385 return FLASH_ERR_NOT_INIT;
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386 }
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387 memcpy(_data, _addr, len);
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388 return FLASH_ERR_OK;
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389 #endif
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390 }
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391
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392 #ifdef CYGHWR_IO_FLASH_BLOCK_LOCKING
119
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393
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394 int
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395 flash_lock(void *addr, int len, void **err_addr)
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396 {
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397 unsigned short *block, *end_addr;
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398 int stat = 0;
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399 typedef int code_fun(unsigned short *);
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400 code_fun *_flash_lock_block;
141
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401 int d_cache, i_cache;
119
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402
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403 if (!flash_info.init) {
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404 return FLASH_ERR_NOT_INIT;
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405 }
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406
174
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407 #ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
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408 if (plf_flash_query_soft_wp(addr,len))
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409 return FLASH_ERR_PROTECT;
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410 #endif
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411
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412 _flash_lock_block = (code_fun*) __anonymizer(&flash_lock_block);
119
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413
174
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414 block = (unsigned short *)((CYG_ADDRESS)addr & flash_info.block_mask);
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415 end_addr = (unsigned short *)((CYG_ADDRESS)addr+len);
119
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416
208
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417 /* Check to see if end_addr overflowed */
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418 if( (end_addr < block) && (len > 0) ){
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419 end_addr = (unsigned short *) ((CYG_ADDRESS) flash_info.end - 1);
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420 }
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421
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422 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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423 (*flash_info.pf)("... Lock from %p-%p: ", block, end_addr);
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424 #endif
119
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diff changeset
425
154
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426 HAL_FLASH_CACHES_OFF(d_cache, i_cache);
156
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427 FLASH_Enable(block, end_addr);
119
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428 while (block < end_addr) {
208
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diff changeset
429 unsigned short *tmp_block;
119
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430 stat = (*_flash_lock_block)(block);
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431 stat = flash_hwr_map_error(stat);
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diff changeset
432 if (stat) {
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433 *err_addr = (void *)block;
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434 break;
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diff changeset
435 }
208
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diff changeset
436
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diff changeset
437 // Check to see if block will overflow
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diff changeset
438 tmp_block = block + flash_info.block_size / sizeof(*block);
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439 if(tmp_block < block){
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diff changeset
440 // If block address overflows, set block value to end on this loop
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diff changeset
441 block = end_addr;
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442 }
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diff changeset
443 else{
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444 block = tmp_block;
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445 }
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446 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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447 (*flash_info.pf)(".");
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448 #endif
119
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449 }
156
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450 FLASH_Disable(block, end_addr);
141
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451 HAL_FLASH_CACHES_ON(d_cache, i_cache);
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452 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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453 (*flash_info.pf)("\n");
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454 #endif
119
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455 return (stat);
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456 }
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457
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diff changeset
458 int
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459 flash_unlock(void *addr, int len, void **err_addr)
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diff changeset
460 {
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461 unsigned short *block, *end_addr;
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462 int stat = 0;
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463 typedef int code_fun(unsigned short *, int, int);
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diff changeset
464 code_fun *_flash_unlock_block;
141
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diff changeset
465 int d_cache, i_cache;
119
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diff changeset
466
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467 if (!flash_info.init) {
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468 return FLASH_ERR_NOT_INIT;
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469 }
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470
174
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471 #ifdef CYGSEM_IO_FLASH_SOFT_WRITE_PROTECT
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472 if (plf_flash_query_soft_wp(addr,len))
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473 return FLASH_ERR_PROTECT;
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474 #endif
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475
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diff changeset
476 _flash_unlock_block = (code_fun*) __anonymizer(&flash_unlock_block);
119
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477
174
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diff changeset
478 block = (unsigned short *)((CYG_ADDRESS)addr & flash_info.block_mask);
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479 end_addr = (unsigned short *)((CYG_ADDRESS)addr+len);
119
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diff changeset
480
208
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481 /* Check to see if end_addr overflowed */
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482 if( (end_addr < block) && (len > 0) ){
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diff changeset
483 end_addr = (unsigned short *) ((CYG_ADDRESS) flash_info.end - 1);
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484 }
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485
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486 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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487 (*flash_info.pf)("... Unlock from %p-%p: ", block, end_addr);
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488 #endif
119
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489
154
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490 HAL_FLASH_CACHES_OFF(d_cache, i_cache);
156
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491 FLASH_Enable(block, end_addr);
119
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492 while (block < end_addr) {
208
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diff changeset
493 unsigned short *tmp_block;
119
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diff changeset
494 stat = (*_flash_unlock_block)(block, flash_info.block_size, flash_info.blocks);
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diff changeset
495 stat = flash_hwr_map_error(stat);
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diff changeset
496 if (stat) {
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497 *err_addr = (void *)block;
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diff changeset
498 break;
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499 }
208
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500
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501 tmp_block = block + flash_info.block_size / sizeof(*block);
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502 if(tmp_block < block){
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503 // If block address overflows, set block value to end on this loop
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504 block = end_addr;
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505 }
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506 else{
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diff changeset
507 block = tmp_block;
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diff changeset
508 }
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diff changeset
509 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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diff changeset
510 (*flash_info.pf)(".");
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511 #endif
119
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diff changeset
512 }
156
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diff changeset
513 FLASH_Disable(block, end_addr);
141
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diff changeset
514 HAL_FLASH_CACHES_ON(d_cache, i_cache);
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515 #ifdef CYGSEM_IO_FLASH_CHATTER
162
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diff changeset
516 (*flash_info.pf)("\n");
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517 #endif
119
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diff changeset
518 return (stat);
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diff changeset
519 }
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diff changeset
520 #endif
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diff changeset
521
115
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parents:
diff changeset
522 char *
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523 flash_errmsg(int err)
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parents:
diff changeset
524 {
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525 switch (err) {
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parents:
diff changeset
526 case FLASH_ERR_OK:
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parents:
diff changeset
527 return "No error - operation complete";
136
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diff changeset
528 case FLASH_ERR_ERASE_SUSPEND:
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parents: 121
diff changeset
529 return "Device is in erase suspend state";
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diff changeset
530 case FLASH_ERR_PROGRAM_SUSPEND:
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diff changeset
531 return "Device is in program suspend state";
115
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parents:
diff changeset
532 case FLASH_ERR_INVALID:
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parents:
diff changeset
533 return "Invalid FLASH address";
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parents:
diff changeset
534 case FLASH_ERR_ERASE:
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parents:
diff changeset
535 return "Error trying to erase";
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parents:
diff changeset
536 case FLASH_ERR_LOCK:
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parents:
diff changeset
537 return "Error trying to lock/unlock";
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jlarmour
parents:
diff changeset
538 case FLASH_ERR_PROGRAM:
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parents:
diff changeset
539 return "Error trying to program";
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parents:
diff changeset
540 case FLASH_ERR_PROTOCOL:
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parents:
diff changeset
541 return "Generic error";
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jlarmour
parents:
diff changeset
542 case FLASH_ERR_PROTECT:
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parents:
diff changeset
543 return "Device/region is write-protected";
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parents:
diff changeset
544 case FLASH_ERR_NOT_INIT:
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parents:
diff changeset
545 return "FLASH sub-system not initialized";
143
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jlarmour
parents: 141
diff changeset
546 case FLASH_ERR_DRV_VERIFY:
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parents: 141
diff changeset
547 return "Data verify failed after operation";
154
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jlarmour
parents: 151
diff changeset
548 case FLASH_ERR_DRV_TIMEOUT:
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jlarmour
parents: 151
diff changeset
549 return "Driver timed out waiting for device";
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parents: 151
diff changeset
550 case FLASH_ERR_DRV_WRONG_PART:
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parents: 151
diff changeset
551 return "Driver does not support device";
156
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parents: 154
diff changeset
552 case FLASH_ERR_LOW_VOLTAGE:
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parents: 154
diff changeset
553 return "Device reports low voltage";
115
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parents:
diff changeset
554 default:
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parents:
diff changeset
555 return "Unknown error";
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jlarmour
parents:
diff changeset
556 }
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parents:
diff changeset
557 }
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
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parents: 143
diff changeset
558
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diff changeset
559 // EOF io/flash/..../flash.c