00001 /* 00002 * Copyright 2010 by egnite 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/morphoq1.c 00037 * \brief Morphoq 1 board initialization. 00038 * 00039 * \verbatim 00040 * $Id$ 00041 * \endverbatim 00042 */ 00043 00044 #include <arch/arm.h> 00045 00046 #define PHY_STRAP_AD0 _BV(PB7_ERXER_A) 00047 #define PHY_STRAP_AD1 _BV(PB17_ERXCK_A) 00048 #define PHY_STRAP_AD2 _BV(PB14_ERX3_A) 00049 00050 #define PHY_STRAP_MODE0 _BV(PB5_ERX0_A) 00051 #define PHY_STRAP_MODE1 _BV(PB6_ERX1_A) 00052 #define PHY_STRAP_MODE2 _BV(PB16_ECOL_A) 00053 00054 #define PHY_STRAP_RMIISEL _BV(PB13_ERX2_A) 00055 00056 #define PHY_STRAP ( \ 00057 PHY_STRAP_AD0 | PHY_STRAP_AD1 | PHY_STRAP_AD2 | \ 00058 PHY_STRAP_MODE0 | PHY_STRAP_MODE1 | PHY_STRAP_MODE2 | \ 00059 PHY_STRAP_RMIISEL ) 00060 00066 static void MorphoqDelay(int n) 00067 { 00068 int l; 00069 00070 for (l = 0; l < n; l++) { 00071 _NOP(); 00072 } 00073 } 00074 00078 static void MorphoqClockInit(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 MorphoqReset(void) 00089 { 00090 unsigned int mr; 00091 00092 /* Save initial configuration. */ 00093 mr = inr(RSTC_MR) & ~RSTC_KEY_MSK; 00094 /* Set reset pulse length to 250us, disable user reset. */ 00095 outr(RSTC_MR, RSTC_KEY | (2 << RSTC_ERSTL_LSB)); 00096 /* Invoke external reset. */ 00097 outr(RSTC_CR, RSTC_KEY | RSTC_EXTRST); 00098 /* If we have 10k/100n RC, we need to wait 25us (1200 cycles) 00099 ** for NRST becoming low. */ 00100 MorphoqDelay(250); 00101 /* Wait until reset pin is released. */ 00102 while ((inr(RSTC_SR) & RSTC_NRSTL) == 0); 00103 /* Due to the RC filter, the pin is rising very slowly. */ 00104 MorphoqDelay(25000); 00105 /* Restore initial configuration. */ 00106 outr(RSTC_MR, RSTC_KEY | mr); 00107 } 00108 00117 static void MorphoqPhyInit(void) 00118 { 00119 /* The PHY needs 25ms for powering up. */ 00120 MorphoqDelay(250000); 00121 /* Disable pull-ups. */ 00122 outr(PIOB_PUDR, PHY_STRAP); 00123 outr(PIOB_ODR, PHY_STRAP); 00124 outr(PIOB_PER, PHY_STRAP); 00125 /* Toggle reset line. */ 00126 MorphoqReset(); 00127 /* Re-enable the pull-ups. */ 00128 outr(PIOB_PUER, PHY_STRAP); 00129 } 00130 00136 void NutBoardInit(void) 00137 { 00138 MorphoqClockInit(); 00139 MorphoqPhyInit(); 00140 }