diff options
Diffstat (limited to 'cvmx-cn3010-evb-hs5.c')
| -rw-r--r-- | cvmx-cn3010-evb-hs5.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/cvmx-cn3010-evb-hs5.c b/cvmx-cn3010-evb-hs5.c new file mode 100644 index 000000000000..3a3c43e241e4 --- /dev/null +++ b/cvmx-cn3010-evb-hs5.c @@ -0,0 +1,214 @@ +/***********************license start*************** + * Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights + * reserved. + * + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * * Neither the name of Cavium Networks nor the names of + * its contributors may be used to endorse or promote products + * derived from this software without specific prior written + * permission. + * + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" + * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS + * OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH + * RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY + * REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT + * DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES + * OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR + * PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET + * POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT + * OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU. + * + * + * For any questions regarding licensing please contact marketing@caviumnetworks.com + * + ***********************license end**************************************/ + + + + + + +/** + * @file + * + * Interface to the EBH-30xx specific devices + * + * <hr>$Revision: 41586 $<hr> + * + */ + +#include <time.h> +#include "cvmx-config.h" +#include "cvmx.h" +#include "cvmx-sysinfo.h" +#include "cvmx-cn3010-evb-hs5.h" +#include "cvmx-twsi.h" + + +static inline uint8_t bin2bcd(uint8_t bin) +{ + return (bin / 10) << 4 | (bin % 10); +} + +static inline uint8_t bcd2bin(uint8_t bcd) +{ + return (bcd >> 4) * 10 + (bcd & 0xf); +} + +#define TM_CHECK(_expr, _msg) \ + do { \ + if (_expr) { \ + cvmx_dprintf("Warning: RTC has invalid %s field\n", (_msg)); \ + rc = -1; \ + } \ + } while(0); + +static int validate_tm_struct(struct tm * tms) +{ + int rc = 0; + + if (!tms) + return -1; + + TM_CHECK(tms->tm_sec < 0 || tms->tm_sec > 60, "second"); /* + Leap sec */ + TM_CHECK(tms->tm_min < 0 || tms->tm_min > 59, "minute"); + TM_CHECK(tms->tm_hour < 0 || tms->tm_hour > 23, "hour"); + TM_CHECK(tms->tm_mday < 1 || tms->tm_mday > 31, "day"); + TM_CHECK(tms->tm_wday < 0 || tms->tm_wday > 6, "day of week"); + TM_CHECK(tms->tm_mon < 0 || tms->tm_mon > 11, "month"); + TM_CHECK(tms->tm_year < 0 || tms->tm_year > 200,"year"); + + return rc; +} + +/* + * Board-specifc RTC read + * Time is expressed in seconds from epoch (Jan 1 1970 at 00:00:00 UTC) + * and converted internally to calendar format. + */ +uint32_t cvmx_rtc_ds1337_read(void) +{ + int i, retry; + uint32_t time; + uint8_t reg[8]; + uint8_t sec; + struct tm tms; + + + memset(®, 0, sizeof(reg)); + memset(&tms, 0, sizeof(struct tm)); + + for(retry=0; retry<2; retry++) + { + /* Lockless read: detects the infrequent roll-over and retries */ + reg[0] = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0); + for(i=1; i<7; i++) + reg[i] = cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR); + + sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0); + if ((sec & 0xf) == (reg[0] & 0xf)) + break; /* Time did not roll-over, value is correct */ + } + + tms.tm_sec = bcd2bin(reg[0] & 0x7f); + tms.tm_min = bcd2bin(reg[1] & 0x7f); + tms.tm_hour = bcd2bin(reg[2] & 0x3f); + if ((reg[2] & 0x40) && (reg[2] & 0x20)) /* AM/PM format and is PM time */ + { + tms.tm_hour = (tms.tm_hour + 12) % 24; + } + tms.tm_wday = (reg[3] & 0x7) - 1; /* Day of week field is 0..6 */ + tms.tm_mday = bcd2bin(reg[4] & 0x3f); + tms.tm_mon = bcd2bin(reg[5] & 0x1f) - 1; /* Month field is 0..11 */ + tms.tm_year = ((reg[5] & 0x80) ? 100 : 0) + bcd2bin(reg[6]); + + + if (validate_tm_struct(&tms)) + cvmx_dprintf("Warning: RTC calendar is not configured properly\n"); + + time = mktime(&tms); + + return time; +} + +/* + * Board-specific RTC write + * Time returned is in seconds from epoch (Jan 1 1970 at 00:00:00 UTC) + */ +int cvmx_rtc_ds1337_write(uint32_t time) +{ + int i, rc, retry; + struct tm tms; + uint8_t reg[8]; + uint8_t sec; + time_t time_from_epoch = time; + + + localtime_r(&time_from_epoch, &tms); + + if (validate_tm_struct(&tms)) + { + cvmx_dprintf("Error: RTC was passed wrong calendar values, write failed\n"); + goto tm_invalid; + } + + reg[0] = bin2bcd(tms.tm_sec); + reg[1] = bin2bcd(tms.tm_min); + reg[2] = bin2bcd(tms.tm_hour); /* Force 0..23 format even if using AM/PM */ + reg[3] = bin2bcd(tms.tm_wday + 1); + reg[4] = bin2bcd(tms.tm_mday); + reg[5] = bin2bcd(tms.tm_mon + 1); + if (tms.tm_year >= 100) /* Set century bit*/ + { + reg[5] |= 0x80; + } + reg[6] = bin2bcd(tms.tm_year % 100); + + /* Lockless write: detects the infrequent roll-over and retries */ + for(retry=0; retry<2; retry++) + { + rc = 0; + for(i=0; i<7; i++) + { + rc |= cvmx_twsi_write8(CVMX_RTC_DS1337_ADDR, i, reg[i]); + } + + sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0); + if ((sec & 0xf) == (reg[0] & 0xf)) + break; /* Time did not roll-over, value is correct */ + } + + return (rc ? -1 : 0); + + tm_invalid: + return -1; +} + +#ifdef CVMX_RTC_DEBUG + +void cvmx_rtc_ds1337_dump_state(void) +{ + int i = 0; + + printf("RTC:\n"); + printf("%d : %02X ", i, cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0)); + for(i=1; i<16; i++) { + printf("%02X ", cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR)); + } + printf("\n"); +} + +#endif /* CVMX_RTC_DEBUG */ |