/***********************license start***************
* SPDX-License-Identifier: BSD-3-Clause
*
* 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
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* OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
*
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*
***********************license end**************************************/
/**
* @file
*
* Interface to the EBH-30xx specific devices
*
* <hr>$Revision: 41586 $<hr>
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/timespec.h>
#include <sys/clock.h>
#include <sys/libkern.h>
#include <contrib/octeon-sdk/cvmx.h>
#include <contrib/octeon-sdk/cvmx-cn3010-evb-hs5.h>
#include <contrib/octeon-sdk/cvmx-twsi.h>
#define CT_CHECK(_expr, _msg) \
do { \
if (_expr) { \
cvmx_dprintf("Warning: RTC has invalid %s field\n", (_msg)); \
rc = -1; \
} \
} while(0);
static int validate_ct_struct(struct clocktime *ct)
{
int rc = 0;
if (!ct)
return -1;
CT_CHECK(ct->sec < 0 || ct->sec > 60, "second"); /* + Leap sec */
CT_CHECK(ct->min < 0 || ct->min > 59, "minute");
CT_CHECK(ct->hour < 0 || ct->hour > 23, "hour");
CT_CHECK(ct->day < 1 || ct->day > 31, "day");
CT_CHECK(ct->dow < 0 || ct->dow > 6, "day of week");
CT_CHECK(ct->mon < 1 || ct->mon > 12, "month");
CT_CHECK(ct->year > 2037,"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;
uint8_t reg[8];
uint8_t sec;
struct clocktime ct;
struct timespec ts;
memset(®, 0, sizeof(reg));
memset(&ct, 0, sizeof(ct));
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 */
}
ct.sec = bcd2bin(reg[0] & 0x7f);
ct.min = bcd2bin(reg[1] & 0x7f);
ct.hour = bcd2bin(reg[2] & 0x3f);
if ((reg[2] & 0x40) && (reg[2] & 0x20)) /* AM/PM format and is PM time */
{
ct.hour = (ct.hour + 12) % 24;
}
ct.dow = (reg[3] & 0x7) - 1; /* Day of week field is 0..6 */
ct.day = bcd2bin(reg[4] & 0x3f);
ct.mon = bcd2bin(reg[5] & 0x1f); /* Month field is 1..12 */
#if defined(OCTEON_BOARD_CAPK_0100ND)
/*
* CAPK-0100ND uses DS1307 that does not have century bit
*/
ct.year = 2000 + bcd2bin(reg[6]);
#else
ct.year = ((reg[5] & 0x80) ? 2000 : 1900) + bcd2bin(reg[6]);
#endif
if (validate_ct_struct(&ct))
cvmx_dprintf("Warning: RTC calendar is not configured properly\n");
if (clock_ct_to_ts(&ct, &ts) != 0) {
cvmx_dprintf("Warning: RTC calendar is not configured properly\n");
return 0;
}
return ts.tv_sec;
}
/*
* 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)
{
struct clocktime ct;
struct timespec ts;
int i, rc, retry;
uint8_t reg[8];
uint8_t sec;
ts.tv_sec = time;
ts.tv_nsec = 0;
clock_ts_to_ct(&ts, &ct);
if (validate_ct_struct(&ct))
{
cvmx_dprintf("Error: RTC was passed wrong calendar values, write failed\n");
goto ct_invalid;
}
reg[0] = bin2bcd(ct.sec);
reg[1] = bin2bcd(ct.min);
reg[2] = bin2bcd(ct.hour); /* Force 0..23 format even if using AM/PM */
reg[3] = bin2bcd(ct.dow + 1);
reg[4] = bin2bcd(ct.day);
reg[5] = bin2bcd(ct.mon);
#if !defined(OCTEON_BOARD_CAPK_0100ND)
if (ct.year >= 2000) /* Set century bit*/
{
reg[5] |= 0x80;
}
#endif
reg[6] = bin2bcd(ct.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);
ct_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 */
