1 /* ----------------------------------------------------------------------------
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2 * ATMEL Microcontroller Software Support
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3 * ----------------------------------------------------------------------------
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4 * Copyright (c) 2008, Atmel Corporation
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6 * All rights reserved.
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are met:
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11 * - Redistributions of source code must retain the above copyright notice,
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12 * this list of conditions and the disclaimer below.
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14 * Atmel's name may not be used to endorse or promote products derived from
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15 * this software without specific prior written permission.
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17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 * ----------------------------------------------------------------------------
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31 #define trace_LEVEL trace_INFO
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34 //------------------------------------------------------------------------------
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36 //------------------------------------------------------------------------------
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40 #ifdef BOARD_FLASH_EEFC
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42 #include <utility/assert.h>
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43 #include <utility/trace.h>
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45 //------------------------------------------------------------------------------
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47 //------------------------------------------------------------------------------
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49 //------------------------------------------------------------------------------
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50 /// Enables the flash ready interrupt source on the EEFC peripheral.
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51 //------------------------------------------------------------------------------
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52 void EFC_EnableFrdyIt(void)
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54 AT91C_BASE_EFC->EFC_FMR |= AT91C_EFC_FRDY;
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57 //------------------------------------------------------------------------------
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58 /// Disables the flash ready interrupt source on the EEFC peripheral.
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59 //------------------------------------------------------------------------------
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60 void EFC_DisableFrdyIt(void)
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62 AT91C_BASE_EFC->EFC_FMR &= ~AT91C_EFC_FRDY;
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65 //------------------------------------------------------------------------------
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66 /// Translates the given address page and offset values. The resulting
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67 /// values are stored in the provided variables if they are not null.
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68 /// \param address Address to translate.
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69 /// \param pPage First page accessed.
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70 /// \param pOffset Byte offset in first page.
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71 //------------------------------------------------------------------------------
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72 void EFC_TranslateAddress(
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73 unsigned int address,
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74 unsigned short *pPage,
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75 unsigned short *pOffset)
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77 unsigned short page;
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78 unsigned short offset;
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80 SANITY_CHECK(address >= AT91C_IFLASH);
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81 SANITY_CHECK(address <= (AT91C_IFLASH + AT91C_IFLASH_SIZE));
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83 // Calculate page & offset
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84 page = (address - AT91C_IFLASH) / AT91C_IFLASH_PAGE_SIZE;
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85 offset = (address - AT91C_IFLASH) % AT91C_IFLASH_PAGE_SIZE;
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86 trace_LOG(trace_DEBUG,
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87 "-D- Translated 0x%08X to page=%d and offset=%d\n\r",
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88 address, page, offset);
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101 //------------------------------------------------------------------------------
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102 /// Computes the address of a flash access given the page and offset.
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103 /// \param page Page number.
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104 /// \param offset Byte offset inside page.
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105 /// \param pAddress Computed address (optional).
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106 //------------------------------------------------------------------------------
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107 void EFC_ComputeAddress(
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108 unsigned short page,
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109 unsigned short offset,
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110 unsigned int *pAddress)
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112 unsigned int address;
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114 SANITY_CHECK(page <= AT91C_IFLASH_NB_OF_PAGES);
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115 SANITY_CHECK(offset < AT91C_IFLASH_PAGE_SIZE);
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118 address = AT91C_IFLASH + page * AT91C_IFLASH_PAGE_SIZE + offset;
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123 *pAddress = address;
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127 //------------------------------------------------------------------------------
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128 /// Starts the executing the given command on the EEFC. This function returns
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129 /// as soon as the command is started. It does NOT set the FMCN field automatically.
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130 /// \param command Command to execute.
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131 /// \param argument Command argument (should be 0 if not used).
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132 //------------------------------------------------------------------------------
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133 void EFC_StartCommand(unsigned char command, unsigned short argument)
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135 // Check command & argument
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138 case AT91C_EFC_FCMD_WP:
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139 case AT91C_EFC_FCMD_WPL:
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140 case AT91C_EFC_FCMD_EWP:
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141 case AT91C_EFC_FCMD_EWPL:
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142 case AT91C_EFC_FCMD_EPL:
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143 case AT91C_EFC_FCMD_EPA:
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144 case AT91C_EFC_FCMD_SLB:
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145 case AT91C_EFC_FCMD_CLB:
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146 ASSERT(argument < AT91C_IFLASH_NB_OF_PAGES,
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147 "-F- Embedded flash has only %d pages\n\r",
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148 AT91C_IFLASH_NB_OF_PAGES);
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151 case AT91C_EFC_FCMD_SFB:
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152 case AT91C_EFC_FCMD_CFB:
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153 ASSERT(argument < EFC_NUM_GPNVMS, "-F- Embedded flash has only %d GPNVMs\n\r", EFC_NUM_GPNVMS);
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156 case AT91C_EFC_FCMD_GETD:
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157 case AT91C_EFC_FCMD_EA:
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158 case AT91C_EFC_FCMD_GLB:
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159 case AT91C_EFC_FCMD_GFB:
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160 ASSERT(argument == 0, "-F- Argument is meaningless for the given command.\n\r");
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163 default: ASSERT(0, "-F- Unknown command %d\n\r", command);
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166 // Start commandEmbedded flash
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167 ASSERT((AT91C_BASE_EFC->EFC_FSR & AT91C_EFC_FRDY) == AT91C_EFC_FRDY, "-F- EEFC is not ready\n\r");
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168 AT91C_BASE_EFC->EFC_FCR = (0x5A << 24) | (argument << 8) | command;
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171 //------------------------------------------------------------------------------
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172 /// Performs the given command and wait until its completion (or an error).
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173 /// Returns 0 if successful; otherwise returns an error code.
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174 /// \param command Command to perform.
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175 /// \param argument Optional command argument.
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176 //------------------------------------------------------------------------------
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180 __attribute__ ((section (".ramfunc")))
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182 unsigned char EFC_PerformCommand(unsigned char command, unsigned short argument)
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184 unsigned int status;
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186 #ifdef BOARD_FLASH_IAP_ADDRESS
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187 // Pointer on IAP function in ROM
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188 static void (*IAP_PerformCommand)(unsigned int);
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189 IAP_PerformCommand = (void (*)(unsigned int)) *((unsigned int *) BOARD_FLASH_IAP_ADDRESS);
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191 // Check if IAP function is implemented (opcode in SWI != 'b' or 'ldr') */
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192 if ((((((unsigned long) IAP_PerformCommand >> 24) & 0xFF) != 0xEA) &&
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193 (((unsigned long) IAP_PerformCommand >> 24) & 0xFF) != 0xE5)) {
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195 IAP_PerformCommand((0x5A << 24) | (argument << 8) | command);
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196 return (AT91C_BASE_EFC->EFC_FSR & (AT91C_EFC_LOCKE | AT91C_EFC_FCMDE));
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200 AT91C_BASE_EFC->EFC_FCR = (0x5A << 24) | (argument << 8) | command;
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203 status = AT91C_BASE_EFC->EFC_FSR;
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205 while ((status & AT91C_EFC_FRDY) != AT91C_EFC_FRDY);
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207 return (status & (AT91C_EFC_LOCKE | AT91C_EFC_FCMDE));
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210 //------------------------------------------------------------------------------
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211 /// Returns the current status of the EEFC. Keep in mind that this function clears
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212 /// the value of some status bits (LOCKE, PROGE).
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213 //------------------------------------------------------------------------------
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214 unsigned int EFC_GetStatus(void)
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216 return AT91C_BASE_EFC->EFC_FSR;
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219 //------------------------------------------------------------------------------
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220 /// Returns the result of the last executed command.
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221 //------------------------------------------------------------------------------
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222 unsigned int EFC_GetResult(void) {
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224 return AT91C_BASE_EFC->EFC_FRR;
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227 #endif //#ifdef BOARD_FLASH_EEFC
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