svn commit: r208931 - user/jmallett/octeon/sys/mips/cavium
Juli Mallett
jmallett at FreeBSD.org
Wed Jun 9 02:04:42 UTC 2010
Author: jmallett
Date: Wed Jun 9 02:04:41 2010
New Revision: 208931
URL: http://svn.freebsd.org/changeset/base/208931
Log:
Copy cvmx-cn3010-evb-hs5.c from the Simple Executive to octeon_ds1337.c, which
will implement those functions in a way appropriate for the FreeBSD kernel.
Added:
user/jmallett/octeon/sys/mips/cavium/octeon_ds1337.c
Added: user/jmallett/octeon/sys/mips/cavium/octeon_ds1337.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/jmallett/octeon/sys/mips/cavium/octeon_ds1337.c Wed Jun 9 02:04:41 2010 (r208931)
@@ -0,0 +1,214 @@
+/***********************license start***************
+ * Copyright (c) 2003-2008 Cavium Networks (support at 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 at 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 */
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