1 /***********************license start***************
2 * Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights
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7 * modification, are permitted provided that the following conditions are
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16 * with the distribution.
18 * * Neither the name of Cavium Networks nor the names of
19 * its contributors may be used to endorse or promote products
20 * derived from this software without specific prior written
23 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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32 * OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
35 * For any questions regarding licensing please contact marketing@caviumnetworks.com
37 ***********************license end**************************************/
47 * Interface to the EBH-30xx specific devices
49 * <hr>$Revision: 41586 $<hr>
53 #include <sys/cdefs.h>
54 __FBSDID("$FreeBSD$");
56 #include <sys/param.h>
57 #include <sys/timespec.h>
58 #include <sys/clock.h>
59 #include <sys/libkern.h>
61 #include <contrib/octeon-sdk/cvmx.h>
62 #include <contrib/octeon-sdk/cvmx-cn3010-evb-hs5.h>
63 #include <contrib/octeon-sdk/cvmx-twsi.h>
65 #define CT_CHECK(_expr, _msg) \
68 cvmx_dprintf("Warning: RTC has invalid %s field\n", (_msg)); \
73 static int validate_ct_struct(struct clocktime *ct)
80 CT_CHECK(ct->sec < 0 || ct->sec > 60, "second"); /* + Leap sec */
81 CT_CHECK(ct->min < 0 || ct->min > 59, "minute");
82 CT_CHECK(ct->hour < 0 || ct->hour > 23, "hour");
83 CT_CHECK(ct->day < 1 || ct->day > 31, "day");
84 CT_CHECK(ct->dow < 0 || ct->dow > 6, "day of week");
85 CT_CHECK(ct->mon < 0 || ct->mon > 11, "month");
86 CT_CHECK(ct->year < 0 || ct->year > 200,"year");
92 * Board-specifc RTC read
93 * Time is expressed in seconds from epoch (Jan 1 1970 at 00:00:00 UTC)
94 * and converted internally to calendar format.
96 uint32_t cvmx_rtc_ds1337_read(void)
105 memset(®, 0, sizeof(reg));
106 memset(&ct, 0, sizeof(ct));
108 for(retry=0; retry<2; retry++)
110 /* Lockless read: detects the infrequent roll-over and retries */
111 reg[0] = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0);
113 reg[i] = cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR);
115 sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0);
116 if ((sec & 0xf) == (reg[0] & 0xf))
117 break; /* Time did not roll-over, value is correct */
120 ct.sec = bcd2bin(reg[0] & 0x7f);
121 ct.min = bcd2bin(reg[1] & 0x7f);
122 ct.hour = bcd2bin(reg[2] & 0x3f);
123 if ((reg[2] & 0x40) && (reg[2] & 0x20)) /* AM/PM format and is PM time */
125 ct.hour = (ct.hour + 12) % 24;
127 ct.dow = (reg[3] & 0x7) - 1; /* Day of week field is 0..6 */
128 ct.day = bcd2bin(reg[4] & 0x3f);
129 ct.mon = bcd2bin(reg[5] & 0x1f) - 1; /* Month field is 0..11 */
130 ct.year = ((reg[5] & 0x80) ? 100 : 0) + bcd2bin(reg[6]);
133 if (validate_ct_struct(&ct))
134 cvmx_dprintf("Warning: RTC calendar is not configured properly\n");
136 if (clock_ct_to_ts(&ct, &ts) != 0) {
137 cvmx_dprintf("Warning: RTC calendar is not configured properly\n");
145 * Board-specific RTC write
146 * Time returned is in seconds from epoch (Jan 1 1970 at 00:00:00 UTC)
148 int cvmx_rtc_ds1337_write(uint32_t time)
159 clock_ts_to_ct(&ts, &ct);
161 if (validate_ct_struct(&ct))
163 cvmx_dprintf("Error: RTC was passed wrong calendar values, write failed\n");
167 reg[0] = bin2bcd(ct.sec);
168 reg[1] = bin2bcd(ct.min);
169 reg[2] = bin2bcd(ct.hour); /* Force 0..23 format even if using AM/PM */
170 reg[3] = bin2bcd(ct.dow + 1);
171 reg[4] = bin2bcd(ct.day);
172 reg[5] = bin2bcd(ct.mon + 1);
173 if (ct.year >= 100) /* Set century bit*/
177 reg[6] = bin2bcd(ct.year % 100);
179 /* Lockless write: detects the infrequent roll-over and retries */
180 for(retry=0; retry<2; retry++)
185 rc |= cvmx_twsi_write8(CVMX_RTC_DS1337_ADDR, i, reg[i]);
188 sec = cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0);
189 if ((sec & 0xf) == (reg[0] & 0xf))
190 break; /* Time did not roll-over, value is correct */
193 return (rc ? -1 : 0);
199 #ifdef CVMX_RTC_DEBUG
201 void cvmx_rtc_ds1337_dump_state(void)
206 printf("%d : %02X ", i, cvmx_twsi_read8(CVMX_RTC_DS1337_ADDR, 0x0));
207 for(i=1; i<16; i++) {
208 printf("%02X ", cvmx_twsi_read8_cur_addr(CVMX_RTC_DS1337_ADDR));
213 #endif /* CVMX_RTC_DEBUG */