222 lines
6.1 KiB
C
222 lines
6.1 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of Cavium Networks nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS
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* OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
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* RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
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* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
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* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
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* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
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* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET
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* POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT
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* OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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*
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*
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* For any questions regarding licensing please contact marketing@caviumnetworks.com
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*
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***********************license end**************************************/
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/**
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* @file
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*
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* Interface to the EBH-30xx specific devices
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*
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* <hr>$Revision: 41586 $<hr>
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/timespec.h>
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#include <sys/clock.h>
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#include <sys/libkern.h>
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#include <contrib/octeon-sdk/cvmx.h>
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#include <contrib/octeon-sdk/cvmx-cn3010-evb-hs5.h>
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#include <contrib/octeon-sdk/cvmx-twsi.h>
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#define CT_CHECK(_expr, _msg) \
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do { \
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if (_expr) { \
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cvmx_dprintf("Warning: RTC has invalid %s field\n", (_msg)); \
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rc = -1; \
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} \
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} while(0);
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static int validate_ct_struct(struct clocktime *ct)
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{
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int rc = 0;
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if (!ct)
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return -1;
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CT_CHECK(ct->sec < 0 || ct->sec > 60, "second"); /* + Leap sec */
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CT_CHECK(ct->min < 0 || ct->min > 59, "minute");
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CT_CHECK(ct->hour < 0 || ct->hour > 23, "hour");
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CT_CHECK(ct->day < 1 || ct->day > 31, "day");
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CT_CHECK(ct->dow < 0 || ct->dow > 6, "day of week");
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CT_CHECK(ct->mon < 1 || ct->mon > 12, "month");
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CT_CHECK(ct->year > 2037,"year");
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return rc;
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}
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/*
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* Board-specifc RTC read
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* Time is expressed in seconds from epoch (Jan 1 1970 at 00:00:00 UTC)
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* and converted internally to calendar format.
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*/
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uint32_t cvmx_rtc_ds1337_read(void)
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{
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int i, retry;
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uint8_t reg[8];
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uint8_t sec;
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struct clocktime ct;
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struct timespec ts;
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memset(®, 0, sizeof(reg));
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memset(&ct, 0, sizeof(ct));
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for(retry=0; retry<2; retry++)
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{
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/* Lockless read: detects the infrequent roll-over and retries */
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reg[0] = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0);
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for(i=1; i<7; i++)
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reg[i] = cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR);
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sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0);
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if ((sec & 0xf) == (reg[0] & 0xf))
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break; /* Time did not roll-over, value is correct */
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}
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ct.sec = bcd2bin(reg[0] & 0x7f);
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ct.min = bcd2bin(reg[1] & 0x7f);
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ct.hour = bcd2bin(reg[2] & 0x3f);
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if ((reg[2] & 0x40) && (reg[2] & 0x20)) /* AM/PM format and is PM time */
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{
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ct.hour = (ct.hour + 12) % 24;
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}
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ct.dow = (reg[3] & 0x7) - 1; /* Day of week field is 0..6 */
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ct.day = bcd2bin(reg[4] & 0x3f);
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ct.mon = bcd2bin(reg[5] & 0x1f); /* Month field is 1..12 */
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#if defined(OCTEON_BOARD_CAPK_0100ND)
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/*
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* CAPK-0100ND uses DS1307 that does not have century bit
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*/
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ct.year = 2000 + bcd2bin(reg[6]);
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#else
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ct.year = ((reg[5] & 0x80) ? 2000 : 1900) + bcd2bin(reg[6]);
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#endif
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if (validate_ct_struct(&ct))
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cvmx_dprintf("Warning: RTC calendar is not configured properly\n");
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if (clock_ct_to_ts(&ct, &ts) != 0) {
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cvmx_dprintf("Warning: RTC calendar is not configured properly\n");
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return 0;
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}
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return ts.tv_sec;
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}
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/*
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* Board-specific RTC write
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* Time returned is in seconds from epoch (Jan 1 1970 at 00:00:00 UTC)
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*/
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int cvmx_rtc_ds1337_write(uint32_t time)
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{
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struct clocktime ct;
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struct timespec ts;
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int i, rc, retry;
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uint8_t reg[8];
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uint8_t sec;
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ts.tv_sec = time;
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ts.tv_nsec = 0;
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clock_ts_to_ct(&ts, &ct);
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if (validate_ct_struct(&ct))
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{
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cvmx_dprintf("Error: RTC was passed wrong calendar values, write failed\n");
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goto ct_invalid;
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}
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reg[0] = bin2bcd(ct.sec);
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reg[1] = bin2bcd(ct.min);
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reg[2] = bin2bcd(ct.hour); /* Force 0..23 format even if using AM/PM */
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reg[3] = bin2bcd(ct.dow + 1);
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reg[4] = bin2bcd(ct.day);
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reg[5] = bin2bcd(ct.mon);
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#if !defined(OCTEON_BOARD_CAPK_0100ND)
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if (ct.year >= 2000) /* Set century bit*/
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{
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reg[5] |= 0x80;
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}
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#endif
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reg[6] = bin2bcd(ct.year % 100);
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/* Lockless write: detects the infrequent roll-over and retries */
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for(retry=0; retry<2; retry++)
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{
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rc = 0;
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for(i=0; i<7; i++)
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{
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rc |= cvmx_twsi_write8(CVMX_RTC_DS1337_ADDR, i, reg[i]);
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}
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sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0);
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if ((sec & 0xf) == (reg[0] & 0xf))
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break; /* Time did not roll-over, value is correct */
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}
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return (rc ? -1 : 0);
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ct_invalid:
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return -1;
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}
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#ifdef CVMX_RTC_DEBUG
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void cvmx_rtc_ds1337_dump_state(void)
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{
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int i = 0;
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printf("RTC:\n");
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printf("%d : %02X ", i, cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0));
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for(i=1; i<16; i++) {
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printf("%02X ", cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR));
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}
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printf("\n");
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}
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#endif /* CVMX_RTC_DEBUG */
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