1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/***********************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 $<hr>
*
*/
#include <sys/cdefs.h>
__FBSDID("$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 < 0 || ct->mon > 11, "month");
CT_CHECK(ct->year < 0 || ct->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;
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) - 1; /* Month field is 0..11 */
ct.year = ((reg[5] & 0x80) ? 100 : 0) + bcd2bin(reg[6]);
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 + 1);
if (ct.year >= 100) /* Set century bit*/
{
reg[5] |= 0x80;
}
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 */
|
