2 FreeRTOS V7.5.0 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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6 ***************************************************************************
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8 * FreeRTOS provides completely free yet professionally developed, *
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9 * robust, strictly quality controlled, supported, and cross *
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10 * platform software that has become a de facto standard. *
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12 * Help yourself get started quickly and support the FreeRTOS *
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13 * project by purchasing a FreeRTOS tutorial book, reference *
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14 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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18 ***************************************************************************
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20 This file is part of the FreeRTOS distribution.
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22 FreeRTOS is free software; you can redistribute it and/or modify it under
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23 the terms of the GNU General Public License (version 2) as published by the
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24 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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26 >>! NOTE: The modification to the GPL is included to allow you to distribute
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27 >>! a combined work that includes FreeRTOS without being obliged to provide
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28 >>! the source code for proprietary components outside of the FreeRTOS
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31 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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32 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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33 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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34 link: http://www.freertos.org/a00114.html
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38 ***************************************************************************
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40 * Having a problem? Start by reading the FAQ "My application does *
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41 * not run, what could be wrong?" *
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43 * http://www.FreeRTOS.org/FAQHelp.html *
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45 ***************************************************************************
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47 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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48 license and Real Time Engineers Ltd. contact details.
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50 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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51 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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52 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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54 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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55 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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56 licenses offer ticketed support, indemnification and middleware.
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58 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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59 engineered and independently SIL3 certified version for use in safety and
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60 mission critical applications that require provable dependability.
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65 /* Kernel includes. */
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66 #include "FreeRTOS.h"
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70 /* Hardware includes. */
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73 #include "eth_phy.h"
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78 #include "uip_arp.h"
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80 /* Delay between polling the PHY to see if a link has been established. */
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81 #define fecLINK_DELAY ( 500 / portTICK_RATE_MS )
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83 /* Delay to wait for an MII access. */
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84 #define fecMII_DELAY ( 10 / portTICK_RATE_MS )
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85 #define fecMAX_POLLS ( 20 )
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87 /* Constants used to delay while waiting for a tx descriptor to be free. */
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88 #define fecMAX_WAIT_FOR_TX_BUFFER ( 200 / portTICK_RATE_MS )
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90 /* We only use a single Tx descriptor which can lead to Txed packets being sent
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91 twice (due to a bug in the FEC silicon). However, in this case the bug is used
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92 to our advantage in that it means the uip-split mechanism is not required. */
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93 #define fecNUM_FEC_TX_BUFFERS ( 1 )
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94 #define fecTX_BUFFER_TO_USE ( 0 )
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95 /*-----------------------------------------------------------*/
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97 /* The semaphore used to wake the uIP task when data arrives. */
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98 xSemaphoreHandle xFECSemaphore = NULL, xTxSemaphore = NULL;
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100 /* The buffer used by the uIP stack. In this case the pointer is used to
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101 point to one of the Rx buffers to effect a zero copy policy. */
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102 unsigned portCHAR *uip_buf;
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104 /* The DMA descriptors. This is a char array to allow us to align it correctly. */
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105 static unsigned portCHAR xFECTxDescriptors_unaligned[ ( fecNUM_FEC_TX_BUFFERS * sizeof( FECBD ) ) + 16 ];
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106 static unsigned portCHAR xFECRxDescriptors_unaligned[ ( configNUM_FEC_RX_BUFFERS * sizeof( FECBD ) ) + 16 ];
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107 static FECBD *xFECTxDescriptors;
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108 static FECBD *xFECRxDescriptors;
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110 /* The DMA buffers. These are char arrays to allow them to be aligned correctly. */
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111 static unsigned portCHAR ucFECRxBuffers[ ( configNUM_FEC_RX_BUFFERS * configFEC_BUFFER_SIZE ) + 16 ];
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112 static unsigned portBASE_TYPE uxNextRxBuffer = 0, uxIndexToBufferOwner = 0;
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114 /*-----------------------------------------------------------*/
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117 * Enable all the required interrupts in the FEC and in the interrupt controller.
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119 static void prvEnableFECInterrupts( void );
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122 * Reset the FEC if we get into an unrecoverable state.
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124 static void prvResetFEC( portBASE_TYPE xCalledFromISR );
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126 /********************************************************************/
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129 * FUNCTION ADAPTED FROM FREESCALE SUPPLIED SOURCE
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131 * Write a value to a PHY's MII register.
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135 * phy_addr Address of the PHY.
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136 * reg_addr Address of the register in the PHY.
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137 * data Data to be written to the PHY register.
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143 * Please refer to your PHY manual for registers and their meanings.
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144 * mii_write() polls for the FEC's MII interrupt event and clears it.
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145 * If after a suitable amount of time the event isn't triggered, a
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146 * value of 0 is returned.
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148 static int fec_mii_write( int phy_addr, int reg_addr, int data )
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150 int timeout, iReturn;
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153 /* Clear the MII interrupt bit */
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154 MCF_FEC_EIR = MCF_FEC_EIR_MII;
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156 /* Mask the MII interrupt */
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157 eimr = MCF_FEC_EIMR;
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158 MCF_FEC_EIMR &= ~MCF_FEC_EIMR_MII;
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160 /* Write to the MII Management Frame Register to kick-off the MII write */
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161 MCF_FEC_MMFR = MCF_FEC_MMFR_ST_01 | MCF_FEC_MMFR_OP_WRITE | MCF_FEC_MMFR_PA(phy_addr) | MCF_FEC_MMFR_RA(reg_addr) | MCF_FEC_MMFR_TA_10 | MCF_FEC_MMFR_DATA( data );
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163 /* Poll for the MII interrupt (interrupt should be masked) */
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164 for( timeout = 0; timeout < fecMAX_POLLS; timeout++ )
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166 if( MCF_FEC_EIR & MCF_FEC_EIR_MII )
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172 vTaskDelay( fecMII_DELAY );
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176 if( timeout == fecMAX_POLLS )
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185 /* Clear the MII interrupt bit */
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186 MCF_FEC_EIR = MCF_FEC_EIR_MII;
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188 /* Restore the EIMR */
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189 MCF_FEC_EIMR = eimr;
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194 /********************************************************************/
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196 * FUNCTION ADAPTED FROM FREESCALE SUPPLIED SOURCE
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198 * Read a value from a PHY's MII register.
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202 * phy_addr Address of the PHY.
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203 * reg_addr Address of the register in the PHY.
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204 * data Pointer to storage for the Data to be read
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205 * from the PHY register (passed by reference)
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211 * Please refer to your PHY manual for registers and their meanings.
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212 * mii_read() polls for the FEC's MII interrupt event and clears it.
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213 * If after a suitable amount of time the event isn't triggered, a
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214 * value of 0 is returned.
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216 static int fec_mii_read( int phy_addr, int reg_addr, unsigned portSHORT* data )
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218 int timeout, iReturn;
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221 /* Clear the MII interrupt bit */
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222 MCF_FEC_EIR = MCF_FEC_EIR_MII;
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224 /* Mask the MII interrupt */
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225 eimr = MCF_FEC_EIMR;
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226 MCF_FEC_EIMR &= ~MCF_FEC_EIMR_MII;
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228 /* Write to the MII Management Frame Register to kick-off the MII read */
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229 MCF_FEC_MMFR = MCF_FEC_MMFR_ST_01 | MCF_FEC_MMFR_OP_READ | MCF_FEC_MMFR_PA(phy_addr) | MCF_FEC_MMFR_RA(reg_addr) | MCF_FEC_MMFR_TA_10;
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231 /* Poll for the MII interrupt (interrupt should be masked) */
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232 for( timeout = 0; timeout < fecMAX_POLLS; timeout++ )
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234 if (MCF_FEC_EIR & MCF_FEC_EIR_MII)
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240 vTaskDelay( fecMII_DELAY );
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244 if( timeout == fecMAX_POLLS )
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250 *data = (uint16)(MCF_FEC_MMFR & 0x0000FFFF);
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254 /* Clear the MII interrupt bit */
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255 MCF_FEC_EIR = MCF_FEC_EIR_MII;
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257 /* Restore the EIMR */
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258 MCF_FEC_EIMR = eimr;
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264 /********************************************************************/
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266 * FUNCTION ADAPTED FROM FREESCALE SUPPLIED SOURCE
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268 * Generate the hash table settings for the given address
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271 * addr 48-bit (6 byte) Address to generate the hash for
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274 * The 6 most significant bits of the 32-bit CRC result
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276 static unsigned portCHAR fec_hash_address( const unsigned portCHAR* addr )
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278 unsigned portLONG crc;
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279 unsigned portCHAR byte;
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288 if((byte & 0x01)^(crc & 0x01))
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291 crc = crc ^ 0xEDB88320;
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302 return (unsigned portCHAR)(crc >> 26);
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305 /********************************************************************/
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307 * FUNCTION ADAPTED FROM FREESCALE SUPPLIED SOURCE
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309 * Set the Physical (Hardware) Address and the Individual Address
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310 * Hash in the selected FEC
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314 * pa Physical (Hardware) Address for the selected FEC
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316 static void fec_set_address( const unsigned portCHAR *pa )
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318 unsigned portCHAR crc;
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321 * Set the Physical Address
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323 /* Set the source address for the controller */
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324 MCF_FEC_PALR = ( pa[ 0 ] << 24 ) | ( pa[ 1 ] << 16 ) | ( pa[ 2 ] << 8 ) | ( pa[ 3 ] << 0 );
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325 MCF_FEC_PAUR = ( pa[ 4 ] << 24 ) | ( pa[ 5 ] << 16 );
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328 * Calculate and set the hash for given Physical Address
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329 * in the Individual Address Hash registers
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331 crc = fec_hash_address( pa );
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334 MCF_FEC_IAUR |= (unsigned portLONG)(1 << (crc - 32));
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338 MCF_FEC_IALR |= (unsigned portLONG)(1 << crc);
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341 /*-----------------------------------------------------------*/
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343 static void prvInitialiseFECBuffers( void )
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345 unsigned portBASE_TYPE ux;
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346 unsigned portCHAR *pcBufPointer;
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348 /* Correctly align the Tx descriptor pointer. */
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349 pcBufPointer = &( xFECTxDescriptors_unaligned[ 0 ] );
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350 while( ( ( unsigned portLONG ) pcBufPointer & 0x0fUL ) != 0 )
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355 xFECTxDescriptors = ( FECBD * ) pcBufPointer;
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357 /* Likewise the Rx descriptor pointer. */
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358 pcBufPointer = &( xFECRxDescriptors_unaligned[ 0 ] );
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359 while( ( ( unsigned portLONG ) pcBufPointer & 0x0fUL ) != 0 )
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364 xFECRxDescriptors = ( FECBD * ) pcBufPointer;
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367 /* Setup the Tx buffers and descriptors. There is no separate Tx buffer
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368 to point to (the Rx buffers are actually used) so the data member is
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369 set to NULL for now. */
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370 for( ux = 0; ux < fecNUM_FEC_TX_BUFFERS; ux++ )
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372 xFECTxDescriptors[ ux ].status = TX_BD_TC;
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373 xFECTxDescriptors[ ux ].data = NULL;
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374 xFECTxDescriptors[ ux ].length = 0;
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377 /* Setup the Rx buffers and descriptors, having first ensured correct
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379 pcBufPointer = &( ucFECRxBuffers[ 0 ] );
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380 while( ( ( unsigned portLONG ) pcBufPointer & 0x0fUL ) != 0 )
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385 for( ux = 0; ux < configNUM_FEC_RX_BUFFERS; ux++ )
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387 xFECRxDescriptors[ ux ].status = RX_BD_E;
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388 xFECRxDescriptors[ ux ].length = configFEC_BUFFER_SIZE;
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389 xFECRxDescriptors[ ux ].data = pcBufPointer;
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390 pcBufPointer += configFEC_BUFFER_SIZE;
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393 /* Set the wrap bit in the last descriptors to form a ring. */
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394 xFECTxDescriptors[ fecNUM_FEC_TX_BUFFERS - 1 ].status |= TX_BD_W;
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395 xFECRxDescriptors[ configNUM_FEC_RX_BUFFERS - 1 ].status |= RX_BD_W;
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397 uxNextRxBuffer = 0;
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399 /*-----------------------------------------------------------*/
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401 void vFECInit( void )
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403 unsigned portSHORT usData;
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404 struct uip_eth_addr xAddr;
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405 unsigned portBASE_TYPE ux;
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407 /* The MAC address is set at the foot of FreeRTOSConfig.h. */
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408 const unsigned portCHAR ucMACAddress[6] =
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410 configMAC_0, configMAC_1,configMAC_2, configMAC_3, configMAC_4, configMAC_5
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413 /* Create the semaphore used by the ISR to wake the uIP task. */
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414 vSemaphoreCreateBinary( xFECSemaphore );
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416 /* Create the semaphore used to unblock any tasks that might be waiting
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417 for a Tx descriptor. */
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418 vSemaphoreCreateBinary( xTxSemaphore );
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420 /* Initialise all the buffers and descriptors used by the DMA. */
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421 prvInitialiseFECBuffers();
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423 for( usData = 0; usData < 6; usData++ )
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425 xAddr.addr[ usData ] = ucMACAddress[ usData ];
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427 uip_setethaddr( xAddr );
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429 /* Set the Reset bit and clear the Enable bit */
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430 MCF_FEC_ECR = MCF_FEC_ECR_RESET;
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432 /* Wait at least 8 clock cycles */
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433 for( usData = 0; usData < 10; usData++ )
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438 /* Set MII speed to 2.5MHz. */
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439 MCF_FEC_MSCR = MCF_FEC_MSCR_MII_SPEED( ( ( ( configCPU_CLOCK_HZ / 1000000 ) / 5 ) + 1 ) );
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441 /* Initialize PLDPAR to enable Ethernet LEDs. */
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442 MCF_GPIO_PLDPAR = MCF_GPIO_PLDPAR_ACTLED_ACTLED | MCF_GPIO_PLDPAR_LINKLED_LINKLED | MCF_GPIO_PLDPAR_SPDLED_SPDLED
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443 | MCF_GPIO_PLDPAR_DUPLED_DUPLED | MCF_GPIO_PLDPAR_COLLED_COLLED | MCF_GPIO_PLDPAR_RXLED_RXLED
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444 | MCF_GPIO_PLDPAR_TXLED_TXLED;
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446 /* Initialize Port TA to enable Axcel control. */
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447 MCF_GPIO_PTAPAR = 0x00;
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448 MCF_GPIO_DDRTA = 0x0F;
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449 MCF_GPIO_PORTTA = 0x04;
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451 /* Set phy address to zero. */
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452 MCF_EPHY_EPHYCTL1 = MCF_EPHY_EPHYCTL1_PHYADD( 0 );
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454 /* Enable EPHY module with PHY clocks disabled. Do not turn on PHY clocks
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455 until both FEC and EPHY are completely setup (see Below). */
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456 MCF_EPHY_EPHYCTL0 = (uint8)(MCF_EPHY_EPHYCTL0_DIS100 | MCF_EPHY_EPHYCTL0_DIS10);
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458 /* Enable auto_neg at start-up */
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459 MCF_EPHY_EPHYCTL0 = (uint8)(MCF_EPHY_EPHYCTL0 & (MCF_EPHY_EPHYCTL0_ANDIS));
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461 /* Enable EPHY module. */
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462 MCF_EPHY_EPHYCTL0 = (uint8)(MCF_EPHY_EPHYCTL0_EPHYEN | MCF_EPHY_EPHYCTL0);
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464 /* Let PHY PLLs be determined by PHY. */
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465 MCF_EPHY_EPHYCTL0 = (uint8)(MCF_EPHY_EPHYCTL0 & ~(MCF_EPHY_EPHYCTL0_DIS100 | MCF_EPHY_EPHYCTL0_DIS10));
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468 vTaskDelay( fecLINK_DELAY );
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470 /* Can we talk to the PHY? */
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473 vTaskDelay( fecLINK_DELAY );
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475 fec_mii_read( configPHY_ADDRESS, PHY_PHYIDR1, &usData );
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477 } while( usData == 0xffff );
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481 /* Start auto negotiate. */
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482 fec_mii_write( configPHY_ADDRESS, PHY_BMCR, ( PHY_BMCR_AN_RESTART | PHY_BMCR_AN_ENABLE ) );
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484 /* Wait for auto negotiate to complete. */
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490 /* Hardware bug workaround! Force 100Mbps half duplex. */
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491 while( !fec_mii_read( configPHY_ADDRESS, 0, &usData ) ){};
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492 usData &= ~0x2000; /* 10Mbps */
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493 usData &= ~0x0100; /* Half Duplex */
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494 usData &= ~0x1000; /* Manual Mode */
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495 while( !fec_mii_write( configPHY_ADDRESS, 0, usData ) ){};
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496 while( !fec_mii_write( configPHY_ADDRESS, 0, (usData|0x0200) )){}; /* Force re-negotiate */
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499 vTaskDelay( fecLINK_DELAY );
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500 fec_mii_read( configPHY_ADDRESS, PHY_BMSR, &usData );
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502 } while( !( usData & PHY_BMSR_AN_COMPLETE ) );
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504 } while( 0 ); //while( !( usData & PHY_BMSR_LINK ) );
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506 /* When we get here we have a link - find out what has been negotiated. */
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507 fec_mii_read( configPHY_ADDRESS, PHY_ANLPAR, &usData );
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509 if( ( usData & PHY_ANLPAR_100BTX_FDX ) || ( usData & PHY_ANLPAR_100BTX ) )
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511 /* Speed is 100. */
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518 if( ( usData & PHY_ANLPAR_100BTX_FDX ) || ( usData & PHY_ANLPAR_10BTX_FDX ) )
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520 MCF_FEC_RCR &= (unsigned portLONG)~MCF_FEC_RCR_DRT;
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521 MCF_FEC_TCR |= MCF_FEC_TCR_FDEN;
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525 MCF_FEC_RCR |= MCF_FEC_RCR_DRT;
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526 MCF_FEC_TCR &= (unsigned portLONG)~MCF_FEC_TCR_FDEN;
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529 /* Clear the Individual and Group Address Hash registers */
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535 /* Set the Physical Address for the selected FEC */
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536 fec_set_address( ucMACAddress );
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538 /* Set Rx Buffer Size */
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539 MCF_FEC_EMRBR = (unsigned portSHORT)configFEC_BUFFER_SIZE;
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541 /* Point to the start of the circular Rx buffer descriptor queue */
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542 MCF_FEC_ERDSR = ( volatile unsigned portLONG ) &( xFECRxDescriptors[ 0 ] );
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544 /* Point to the start of the circular Tx buffer descriptor queue */
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545 MCF_FEC_ETSDR = ( volatile unsigned portLONG ) &( xFECTxDescriptors[ 0 ] );
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547 /* Mask all FEC interrupts */
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548 MCF_FEC_EIMR = ( unsigned portLONG ) -1;
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550 /* Clear all FEC interrupt events */
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551 MCF_FEC_EIR = ( unsigned portLONG ) -1;
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553 /* Initialize the Receive Control Register */
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554 MCF_FEC_RCR = MCF_FEC_RCR_MAX_FL(ETH_MAX_FRM) | MCF_FEC_RCR_FCE;
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556 MCF_FEC_RCR |= MCF_FEC_RCR_MII_MODE;
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558 #if( configUSE_PROMISCUOUS_MODE == 1 )
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560 MCF_FEC_RCR |= MCF_FEC_RCR_PROM;
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564 prvEnableFECInterrupts();
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566 /* Finally... enable. */
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567 MCF_FEC_ECR = MCF_FEC_ECR_ETHER_EN;
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568 MCF_FEC_RDAR = MCF_FEC_RDAR_R_DES_ACTIVE;
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570 /*-----------------------------------------------------------*/
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572 static void prvEnableFECInterrupts( void )
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574 const unsigned portBASE_TYPE uxFirstFECVector = 23, uxLastFECVector = 35;
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575 unsigned portBASE_TYPE ux;
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577 #if configFEC_INTERRUPT_PRIORITY > configMAX_SYSCALL_INTERRUPT_PRIORITY
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578 #error configFEC_INTERRUPT_PRIORITY must be less than or equal to configMAX_SYSCALL_INTERRUPT_PRIORITY
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581 /* Set the priority of each of the FEC interrupts. */
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582 for( ux = uxFirstFECVector; ux <= uxLastFECVector; ux++ )
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584 MCF_INTC0_ICR( ux ) = MCF_INTC_ICR_IL( configFEC_INTERRUPT_PRIORITY );
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587 /* Enable the FEC interrupts in the mask register */
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588 MCF_INTC0_IMRH &= ~( MCF_INTC_IMRH_INT_MASK33 | MCF_INTC_IMRH_INT_MASK34 | MCF_INTC_IMRH_INT_MASK35 );
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589 MCF_INTC0_IMRL &= ~( MCF_INTC_IMRL_INT_MASK25 | MCF_INTC_IMRL_INT_MASK26 | MCF_INTC_IMRL_INT_MASK27
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590 | MCF_INTC_IMRL_INT_MASK28 | MCF_INTC_IMRL_INT_MASK29 | MCF_INTC_IMRL_INT_MASK30
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591 | MCF_INTC_IMRL_INT_MASK31 | MCF_INTC_IMRL_INT_MASK23 | MCF_INTC_IMRL_INT_MASK24
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592 | MCF_INTC_IMRL_MASKALL );
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594 /* Clear any pending FEC interrupt events */
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595 MCF_FEC_EIR = MCF_FEC_EIR_CLEAR_ALL;
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597 /* Unmask all FEC interrupts */
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598 MCF_FEC_EIMR = MCF_FEC_EIMR_UNMASK_ALL;
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600 /*-----------------------------------------------------------*/
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602 static void prvResetFEC( portBASE_TYPE xCalledFromISR )
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606 /* A critical section is used unless this function is being called from
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608 if( xCalledFromISR == pdFALSE )
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610 taskENTER_CRITICAL();
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614 /* Reset all buffers and descriptors. */
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615 prvInitialiseFECBuffers();
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617 /* Set the Reset bit and clear the Enable bit */
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618 MCF_FEC_ECR = MCF_FEC_ECR_RESET;
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620 /* Wait at least 8 clock cycles */
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621 for( x = 0; x < 10; x++ )
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627 MCF_FEC_ECR = MCF_FEC_ECR_ETHER_EN;
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628 MCF_FEC_RDAR = MCF_FEC_RDAR_R_DES_ACTIVE;
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631 if( xCalledFromISR == pdFALSE )
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633 taskEXIT_CRITICAL();
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636 /*-----------------------------------------------------------*/
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638 unsigned short usFECGetRxedData( void )
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640 unsigned portSHORT usLen;
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642 /* Obtain the size of the packet and put it into the "len" variable. */
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643 usLen = xFECRxDescriptors[ uxNextRxBuffer ].length;
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645 if( ( usLen != 0 ) && ( ( xFECRxDescriptors[ uxNextRxBuffer ].status & RX_BD_E ) == 0 ) )
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647 uip_buf = xFECRxDescriptors[ uxNextRxBuffer ].data;
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656 /*-----------------------------------------------------------*/
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658 void vFECRxProcessingCompleted( void )
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660 /* Free the descriptor as the buffer it points to is no longer in use. */
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661 xFECRxDescriptors[ uxNextRxBuffer ].status |= RX_BD_E;
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662 MCF_FEC_RDAR = MCF_FEC_RDAR_R_DES_ACTIVE;
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664 if( uxNextRxBuffer >= configNUM_FEC_RX_BUFFERS )
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666 uxNextRxBuffer = 0;
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669 /*-----------------------------------------------------------*/
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671 void vFECSendData( void )
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673 /* Ensure no Tx frames are outstanding. */
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674 if( xSemaphoreTake( xTxSemaphore, fecMAX_WAIT_FOR_TX_BUFFER ) == pdPASS )
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676 /* Get a DMA buffer into which we can write the data to send. */
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677 if( xFECTxDescriptors[ fecTX_BUFFER_TO_USE ].status & TX_BD_R )
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679 /*** ERROR didn't expect this. Sledge hammer error handling. ***/
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680 prvResetFEC( pdFALSE );
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682 /* Make sure we leave the semaphore in the expected state as nothing
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683 is being transmitted this will not happen in the Tx ISR. */
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684 xSemaphoreGive( xTxSemaphore );
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688 /* Setup the buffer descriptor for transmission. The data being
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689 sent is actually stored in one of the Rx descriptor buffers,
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690 pointed to by uip_buf. */
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691 xFECTxDescriptors[ fecTX_BUFFER_TO_USE ].length = uip_len;
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692 xFECTxDescriptors[ fecTX_BUFFER_TO_USE ].status |= ( TX_BD_R | TX_BD_L );
\r
693 xFECTxDescriptors[ fecTX_BUFFER_TO_USE ].data = uip_buf;
\r
695 /* Remember which Rx descriptor owns the buffer we are sending. */
\r
696 uxIndexToBufferOwner = uxNextRxBuffer;
\r
698 /* We have finished with this Rx descriptor now. */
\r
700 if( uxNextRxBuffer >= configNUM_FEC_RX_BUFFERS )
\r
702 uxNextRxBuffer = 0;
\r
705 /* Continue the Tx DMA (in case it was waiting for a new TxBD) */
\r
706 MCF_FEC_TDAR = MCF_FEC_TDAR_X_DES_ACTIVE;
\r
711 /* Gave up waiting. Free the buffer back to the DMA. */
\r
712 vFECRxProcessingCompleted();
\r
715 /*-----------------------------------------------------------*/
\r
717 void vFEC_ISR( void )
\r
719 unsigned portLONG ulEvent;
\r
720 portBASE_TYPE xHighPriorityTaskWoken = pdFALSE;
\r
722 /* This handler is called in response to any of the many separate FEC
\r
725 /* Find the cause of the interrupt, then clear the interrupt. */
\r
726 ulEvent = MCF_FEC_EIR & MCF_FEC_EIMR;
\r
727 MCF_FEC_EIR = ulEvent;
\r
729 if( ( ulEvent & MCF_FEC_EIR_RXB ) || ( ulEvent & MCF_FEC_EIR_RXF ) )
\r
731 /* A packet has been received. Wake the handler task. */
\r
732 xSemaphoreGiveFromISR( xFECSemaphore, &xHighPriorityTaskWoken );
\r
735 if( ulEvent & ( MCF_FEC_EIR_UN | MCF_FEC_EIR_RL | MCF_FEC_EIR_LC | MCF_FEC_EIR_EBERR | MCF_FEC_EIR_BABT | MCF_FEC_EIR_BABR | MCF_FEC_EIR_HBERR ) )
\r
737 /* Sledge hammer error handling. */
\r
738 prvResetFEC( pdTRUE );
\r
741 if( ( ulEvent & MCF_FEC_EIR_TXF ) || ( ulEvent & MCF_FEC_EIR_TXB ) )
\r
743 /* The buffer being sent is pointed to by an Rx descriptor, now the
\r
744 buffer has been sent we can mark the Rx descriptor as free again. */
\r
745 xFECRxDescriptors[ uxIndexToBufferOwner ].status |= RX_BD_E;
\r
746 MCF_FEC_RDAR = MCF_FEC_RDAR_R_DES_ACTIVE;
\r
747 xSemaphoreGiveFromISR( xTxSemaphore, &xHighPriorityTaskWoken );
\r
750 portEND_SWITCHING_ISR( xHighPriorityTaskWoken );
\r
752 /*-----------------------------------------------------------*/
\r
754 /* Install the many different interrupt vectors, all of which call the same
\r
755 handler function. */
\r
756 void __attribute__ ((interrupt)) __cs3_isr_interrupt_87( void ) { vFEC_ISR(); }
\r
757 void __attribute__ ((interrupt)) __cs3_isr_interrupt_88( void ) { vFEC_ISR(); }
\r
758 void __attribute__ ((interrupt)) __cs3_isr_interrupt_89( void ) { vFEC_ISR(); }
\r
759 void __attribute__ ((interrupt)) __cs3_isr_interrupt_90( void ) { vFEC_ISR(); }
\r
760 void __attribute__ ((interrupt)) __cs3_isr_interrupt_91( void ) { vFEC_ISR(); }
\r
761 void __attribute__ ((interrupt)) __cs3_isr_interrupt_92( void ) { vFEC_ISR(); }
\r
762 void __attribute__ ((interrupt)) __cs3_isr_interrupt_93( void ) { vFEC_ISR(); }
\r
763 void __attribute__ ((interrupt)) __cs3_isr_interrupt_94( void ) { vFEC_ISR(); }
\r
764 void __attribute__ ((interrupt)) __cs3_isr_interrupt_95( void ) { vFEC_ISR(); }
\r
765 void __attribute__ ((interrupt)) __cs3_isr_interrupt_96( void ) { vFEC_ISR(); }
\r
766 void __attribute__ ((interrupt)) __cs3_isr_interrupt_97( void ) { vFEC_ISR(); }
\r
767 void __attribute__ ((interrupt)) __cs3_isr_interrupt_98( void ) { vFEC_ISR(); }
\r
768 void __attribute__ ((interrupt)) __cs3_isr_interrupt_99( void ) { vFEC_ISR(); }
\r