00001 /* 00002 * Copyright 2011 by Thermotemp GmbH 00003 * 00004 * All rights reserved. 00005 * 00006 * Redistribution and use in source and binary forms, with or without 00007 * modification, are permitted provided that the following conditions 00008 * are met: 00009 * 00010 * 1. Redistributions of source code must retain the above copyright 00011 * notice, this list of conditions and the following disclaimer. 00012 * 2. Redistributions in binary form must reproduce the above copyright 00013 * notice, this list of conditions and the following disclaimer in the 00014 * documentation and/or other materials provided with the distribution. 00015 * 3. Neither the name of the copyright holders nor the names of 00016 * contributors may be used to endorse or promote products derived 00017 * from this software without specific prior written permission. 00018 * 00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00020 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00021 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00022 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 00023 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00024 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00025 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00026 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00027 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00028 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00029 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00030 * SUCH DAMAGE. 00031 * 00032 * For additional information see http://www.ethernut.de/ 00033 */ 00034 00035 /* 00036 * \file arch/arm/board/enet_sam7x.c 00037 * \brief eNet-sam7X board initialization. 00038 * 00039 * \verbatim 00040 * $Id$ 00041 * \endverbatim 00042 */ 00043 00044 #include <arch/arm.h> 00045 #include <inttypes.h> 00046 00047 #define PHY_STRAP_AD0 _BV(PB5_ERX0_A) 00048 #define PHY_STRAP_AD1 _BV(PB6_ERX1_A) 00049 #define PHY_STRAP_AD2 _BV(PB13_ERX2_A) 00050 #define PHY_STRAP_AD3 _BV(PB14_ERX3_A) 00051 #define PHY_STRAP_AD4 _BV(PB4_ECRS_A) 00052 #define PHY_STRAP_TESTMODE _BV(PB15_ERXDV_ECRSDV_A) 00053 #define PHY_STRAP_RMIISEL _BV(PB16_ECOL_A) 00054 00055 #define PHY_STRAP ( \ 00056 PHY_STRAP_AD0 | PHY_STRAP_AD1 | PHY_STRAP_AD2 | \ 00057 PHY_STRAP_AD3 | PHY_STRAP_AD4 | PHY_STRAP_TESTMODE | \ 00058 PHY_STRAP_RMIISEL ) 00059 00066 static void eNet_sam7X_Delay(int n) 00067 { 00068 int l; 00069 00070 for (l = 0; l < n; l++) { 00071 _NOP(); 00072 } 00073 } 00074 00078 static void eNet_sam7X_ClockInit(void) 00079 { 00080 outr(PMC_PCER, _BV(PIOA_ID)); 00081 outr(PMC_PCER, _BV(PIOB_ID)); 00082 outr(PMC_PCER, _BV(EMAC_ID)); 00083 } 00084 00088 static void eNet_sam7X_Reset(void) 00089 { 00090 uint32_t rstcr_tmp = inr(RSTC_MR) & 0x00FFFFFF; 00091 00092 /* Set reset pulse length to 250us, disable user reset. */ 00093 outr(RSTC_MR, RSTC_KEY | (2 << RSTC_ERSTL_LSB)); 00094 /* Invoke external reset. */ 00095 outr(RSTC_CR, RSTC_KEY | RSTC_EXTRST); 00096 while ((inr(RSTC_SR) & RSTC_NRSTL) == 0); 00097 /* If we have 10k/100n RC, we need to wait 25us (1200 cycles) 00098 ** for NRST becoming low. */ 00099 eNet_sam7X_Delay(250); 00100 /* Wait until reset pin is released. */ 00101 while ((inr(RSTC_SR) & RSTC_NRSTL) == 0); 00102 /* Due to the RC filter, the pin is rising very slowly. */ 00103 eNet_sam7X_Delay(25000); 00104 outr(RSTC_MR, RSTC_KEY | rstcr_tmp); 00105 } 00106 00107 00116 static void eNet_sam7X_PhyInit(void) 00117 { 00118 /* Allow the PHY to power up (25ms) */ 00119 eNet_sam7X_Delay(250000); 00120 /* Disable pull-ups. */ 00121 outr(PIOB_PUDR, PHY_STRAP); 00122 outr(PIOB_ODR, PHY_STRAP); 00123 outr(PIOB_PER, PHY_STRAP); 00124 /* Toggle reset line. */ 00125 eNet_sam7X_Reset(); 00126 /* Re-enable the pull-ups. */ 00127 outr(PIOB_PUER, PHY_STRAP); 00128 } 00129 00135 void NutBoardInit(void) 00136 { 00137 eNet_sam7X_ClockInit(); 00138 eNet_sam7X_PhyInit(); 00139 }