cvmx-cn3010-evb-hs5.c revision 215990
1252995Sdteske/***********************license start*************** 2252995Sdteske * Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights 3263791Sdteske * reserved. 4252995Sdteske * 5252995Sdteske * 6252995Sdteske * Redistribution and use in source and binary forms, with or without 7252995Sdteske * modification, are permitted provided that the following conditions are 8252995Sdteske * met: 9252995Sdteske * 10252995Sdteske * * Redistributions of source code must retain the above copyright 11252995Sdteske * notice, this list of conditions and the following disclaimer. 12252995Sdteske * 13252995Sdteske * * Redistributions in binary form must reproduce the above 14252995Sdteske * copyright notice, this list of conditions and the following 15252995Sdteske * disclaimer in the documentation and/or other materials provided 16252995Sdteske * with the distribution. 17252995Sdteske 18252995Sdteske * * Neither the name of Cavium Networks nor the names of 19252995Sdteske * its contributors may be used to endorse or promote products 20252995Sdteske * derived from this software without specific prior written 21252995Sdteske * permission. 22252995Sdteske 23252995Sdteske * This Software, including technical data, may be subject to U.S. export control 24252995Sdteske * laws, including the U.S. Export Administration Act and its associated 25252995Sdteske * regulations, and may be subject to export or import regulations in other 26252995Sdteske * countries. 27252995Sdteske 28252995Sdteske * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" 29252995Sdteske * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR 30252995Sdteske * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO 31252995Sdteske * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR 32252995Sdteske * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM 33252995Sdteske * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, 34252995Sdteske * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF 35252995Sdteske * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR 36252995Sdteske * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR 37252995Sdteske * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. 38252995Sdteske ***********************license end**************************************/ 39252995Sdteske 40252995Sdteske 41252995Sdteske 42252995Sdteske 43252995Sdteske 44252995Sdteske 45252995Sdteske 46252995Sdteske/** 47252995Sdteske * @file 48252995Sdteske * 49252995Sdteske * Interface to the EBH-30xx specific devices 50252995Sdteske * 51252995Sdteske * <hr>$Revision: 49448 $<hr> 52252995Sdteske * 53252995Sdteske */ 54252995Sdteske 55252995Sdteske#include <time.h> 56252995Sdteske#include "cvmx-config.h" 57252995Sdteske#include "cvmx.h" 58252995Sdteske#include "cvmx-sysinfo.h" 59252995Sdteske#include "cvmx-cn3010-evb-hs5.h" 60252995Sdteske#include "cvmx-twsi.h" 61252995Sdteske 62252995Sdteske 63252995Sdteskestatic inline uint8_t bin2bcd(uint8_t bin) 64252995Sdteske{ 65252995Sdteske return (bin / 10) << 4 | (bin % 10); 66252995Sdteske} 67252995Sdteske 68252995Sdteskestatic inline uint8_t bcd2bin(uint8_t bcd) 69252995Sdteske{ 70252995Sdteske return (bcd >> 4) * 10 + (bcd & 0xf); 71252995Sdteske} 72252995Sdteske 73252995Sdteske#define TM_CHECK(_expr, _msg) \ 74252995Sdteske do { \ 75252995Sdteske if (_expr) { \ 76252995Sdteske cvmx_dprintf("Warning: RTC has invalid %s field\n", (_msg)); \ 77263791Sdteske rc = -1; \ 78263791Sdteske } \ 79263791Sdteske } while(0); 80263791Sdteske 81263791Sdteskestatic int validate_tm_struct(struct tm * tms) 82263791Sdteske{ 83263791Sdteske int rc = 0; 84263791Sdteske 85263791Sdteske if (!tms) 86263791Sdteske return -1; 87263791Sdteske 88263791Sdteske TM_CHECK(tms->tm_sec < 0 || tms->tm_sec > 60, "second"); /* + Leap sec */ 89252995Sdteske TM_CHECK(tms->tm_min < 0 || tms->tm_min > 59, "minute"); 90252995Sdteske TM_CHECK(tms->tm_hour < 0 || tms->tm_hour > 23, "hour"); 91252995Sdteske TM_CHECK(tms->tm_mday < 1 || tms->tm_mday > 31, "day"); 92252995Sdteske TM_CHECK(tms->tm_wday < 0 || tms->tm_wday > 6, "day of week"); 93252995Sdteske TM_CHECK(tms->tm_mon < 0 || tms->tm_mon > 11, "month"); 94252995Sdteske TM_CHECK(tms->tm_year < 0 || tms->tm_year > 200,"year"); 95252995Sdteske 96252995Sdteske return rc; 97252995Sdteske} 98252995Sdteske 99252995Sdteske/* 100252995Sdteske * Board-specifc RTC read 101252995Sdteske * Time is expressed in seconds from epoch (Jan 1 1970 at 00:00:00 UTC) 102252995Sdteske * and converted internally to calendar format. 103252995Sdteske */ 104252995Sdteskeuint32_t cvmx_rtc_ds1337_read(void) 105252995Sdteske{ 106252995Sdteske int i, retry; 107252995Sdteske uint32_t time; 108252995Sdteske uint8_t reg[8]; 109252995Sdteske uint8_t sec; 110252995Sdteske struct tm tms; 111252995Sdteske 112252995Sdteske 113252995Sdteske memset(®, 0, sizeof(reg)); 114252995Sdteske memset(&tms, 0, sizeof(struct tm)); 115252995Sdteske 116252995Sdteske for(retry=0; retry<2; retry++) 117252995Sdteske { 118252995Sdteske /* Lockless read: detects the infrequent roll-over and retries */ 119252995Sdteske reg[0] = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0); 120252995Sdteske for(i=1; i<7; i++) 121252995Sdteske reg[i] = cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR); 122252995Sdteske 123252995Sdteske sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0); 124252995Sdteske if ((sec & 0xf) == (reg[0] & 0xf)) 125252995Sdteske break; /* Time did not roll-over, value is correct */ 126252995Sdteske } 127252995Sdteske 128252995Sdteske tms.tm_sec = bcd2bin(reg[0] & 0x7f); 129252995Sdteske tms.tm_min = bcd2bin(reg[1] & 0x7f); 130252995Sdteske tms.tm_hour = bcd2bin(reg[2] & 0x3f); 131252995Sdteske if ((reg[2] & 0x40) && (reg[2] & 0x20)) /* AM/PM format and is PM time */ 132252995Sdteske { 133252995Sdteske tms.tm_hour = (tms.tm_hour + 12) % 24; 134252995Sdteske } 135252995Sdteske tms.tm_wday = (reg[3] & 0x7) - 1; /* Day of week field is 0..6 */ 136252995Sdteske tms.tm_mday = bcd2bin(reg[4] & 0x3f); 137252995Sdteske tms.tm_mon = bcd2bin(reg[5] & 0x1f) - 1; /* Month field is 0..11 */ 138252995Sdteske tms.tm_year = ((reg[5] & 0x80) ? 100 : 0) + bcd2bin(reg[6]); 139252995Sdteske 140252995Sdteske 141252995Sdteske if (validate_tm_struct(&tms)) 142252995Sdteske cvmx_dprintf("Warning: RTC calendar is not configured properly\n"); 143252995Sdteske 144252995Sdteske time = mktime(&tms); 145252995Sdteske 146252995Sdteske return time; 147252995Sdteske} 148252995Sdteske 149252995Sdteske/* 150252995Sdteske * Board-specific RTC write 151252995Sdteske * Time returned is in seconds from epoch (Jan 1 1970 at 00:00:00 UTC) 152252995Sdteske */ 153252995Sdteskeint cvmx_rtc_ds1337_write(uint32_t time) 154252995Sdteske{ 155252995Sdteske int i, rc, retry; 156252995Sdteske struct tm tms; 157252995Sdteske uint8_t reg[8]; 158252995Sdteske uint8_t sec; 159252995Sdteske time_t time_from_epoch = time; 160252995Sdteske 161252995Sdteske 162252995Sdteske localtime_r(&time_from_epoch, &tms); 163252995Sdteske 164252995Sdteske if (validate_tm_struct(&tms)) 165252995Sdteske { 166252995Sdteske cvmx_dprintf("Error: RTC was passed wrong calendar values, write failed\n"); 167252995Sdteske goto tm_invalid; 168252995Sdteske } 169252995Sdteske 170252995Sdteske reg[0] = bin2bcd(tms.tm_sec); 171252995Sdteske reg[1] = bin2bcd(tms.tm_min); 172252995Sdteske reg[2] = bin2bcd(tms.tm_hour); /* Force 0..23 format even if using AM/PM */ 173252995Sdteske reg[3] = bin2bcd(tms.tm_wday + 1); 174252995Sdteske reg[4] = bin2bcd(tms.tm_mday); 175252995Sdteske reg[5] = bin2bcd(tms.tm_mon + 1); 176252995Sdteske if (tms.tm_year >= 100) /* Set century bit*/ 177252995Sdteske { 178252995Sdteske reg[5] |= 0x80; 179252995Sdteske } 180252995Sdteske reg[6] = bin2bcd(tms.tm_year % 100); 181252995Sdteske 182252995Sdteske /* Lockless write: detects the infrequent roll-over and retries */ 183252995Sdteske for(retry=0; retry<2; retry++) 184252995Sdteske { 185252995Sdteske rc = 0; 186252995Sdteske for(i=0; i<7; i++) 187252995Sdteske { 188252995Sdteske rc |= cvmx_twsi_write8(CVMX_RTC_DS1337_ADDR, i, reg[i]); 189252995Sdteske } 190252995Sdteske 191252995Sdteske sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0); 192252995Sdteske if ((sec & 0xf) == (reg[0] & 0xf)) 193252995Sdteske break; /* Time did not roll-over, value is correct */ 194252995Sdteske } 195252995Sdteske 196252995Sdteske return (rc ? -1 : 0); 197252995Sdteske 198252995Sdteske tm_invalid: 199252995Sdteske return -1; 200252995Sdteske} 201252995Sdteske 202252995Sdteske#ifdef CVMX_RTC_DEBUG 203252995Sdteske 204252995Sdteskevoid cvmx_rtc_ds1337_dump_state(void) 205252995Sdteske{ 206252995Sdteske int i = 0; 207252995Sdteske 208252995Sdteske printf("RTC:\n"); 209252995Sdteske printf("%d : %02X ", i, cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0)); 210253168Sdteske for(i=1; i<16; i++) { 211253168Sdteske printf("%02X ", cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR)); 212252995Sdteske } 213252995Sdteske printf("\n"); 214252995Sdteske} 215252995Sdteske 216252995Sdteske#endif /* CVMX_RTC_DEBUG */ 217252995Sdteske