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
|
/* $NetBSD: pcf8563.c,v 1.3 2012/01/07 21:02:15 phx Exp $ */
/*
* Copyright (c) 2011 Jonathan A. Kollasch
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pcf8563.c,v 1.3 2012/01/07 21:02:15 phx Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <dev/clock_subr.h>
#include <dev/i2c/i2cvar.h>
#include <dev/i2c/pcf8563reg.h>
struct pcf8563rtc_softc {
device_t sc_dev;
i2c_tag_t sc_tag;
int sc_addr;
struct todr_chip_handle sc_todr;
};
static int pcf8563rtc_match(device_t, cfdata_t, void *);
static void pcf8563rtc_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(pcf8563rtc, sizeof(struct pcf8563rtc_softc),
pcf8563rtc_match, pcf8563rtc_attach, NULL, NULL);
static int pcf8563rtc_clock_read(struct pcf8563rtc_softc *, struct clock_ymdhms *);
static int pcf8563rtc_clock_write(struct pcf8563rtc_softc *, struct clock_ymdhms *);
static int pcf8563rtc_gettime(struct todr_chip_handle *, struct clock_ymdhms *);
static int pcf8563rtc_settime(struct todr_chip_handle *, struct clock_ymdhms *);
static int
pcf8563rtc_match(device_t parent, cfdata_t cf, void *aux)
{
struct i2c_attach_args *ia = aux;
if (ia->ia_name) {
/* direct config - check name */
if (strcmp(ia->ia_name, "pcf8563rtc") == 0)
return 1;
} else {
/* indirect config - check typical address */
if (ia->ia_addr == PCF8563_ADDR)
return 1;
}
return 0;
}
static void
pcf8563rtc_attach(device_t parent, device_t self, void *aux)
{
struct pcf8563rtc_softc *sc = device_private(self);
struct i2c_attach_args *ia = aux;
aprint_naive(": Real-time Clock\n");
aprint_normal(": NXP PCF8563 Real-time Clock\n");
sc->sc_dev = self;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
sc->sc_todr.cookie = sc;
sc->sc_todr.todr_gettime_ymdhms = pcf8563rtc_gettime;
sc->sc_todr.todr_settime_ymdhms = pcf8563rtc_settime;
sc->sc_todr.todr_setwen = NULL;
todr_attach(&sc->sc_todr);
}
static int
pcf8563rtc_gettime(struct todr_chip_handle *ch, struct clock_ymdhms *dt)
{
struct pcf8563rtc_softc *sc = ch->cookie;
if (pcf8563rtc_clock_read(sc, dt) == 0)
return -1;
return 0;
}
static int
pcf8563rtc_settime(struct todr_chip_handle *ch, struct clock_ymdhms *dt)
{
struct pcf8563rtc_softc *sc = ch->cookie;
if (pcf8563rtc_clock_write(sc, dt) == 0)
return -1;
return 0;
}
static int
pcf8563rtc_clock_read(struct pcf8563rtc_softc *sc, struct clock_ymdhms *dt)
{
uint8_t bcd[PCF8563_NREGS];
uint8_t reg = PCF8563_R_CS1;
if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
device_printf(sc->sc_dev, "acquire bus for read failed\n");
return 0;
}
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, ®, 1,
&bcd[reg], PCF8563_R_YEAR - reg + 1, I2C_F_POLL)) {
iic_release_bus(sc->sc_tag, I2C_F_POLL);
device_printf(sc->sc_dev, "read failed\n");
return 0;
}
iic_release_bus(sc->sc_tag, I2C_F_POLL);
dt->dt_sec = FROMBCD(bcd[PCF8563_R_SECOND] & PCF8563_M_SECOND);
dt->dt_min = FROMBCD(bcd[PCF8563_R_MINUTE] & PCF8563_M_MINUTE);
dt->dt_hour = FROMBCD(bcd[PCF8563_R_HOUR] & PCF8563_M_HOUR);
dt->dt_day = FROMBCD(bcd[PCF8563_R_DAY] & PCF8563_M_DAY);
dt->dt_mon = FROMBCD(bcd[PCF8563_R_MONTH] & PCF8563_M_MONTH);
dt->dt_year = FROMBCD(bcd[PCF8563_R_YEAR] & PCF8563_M_YEAR);
dt->dt_year += 2000;
return 1;
}
static int
pcf8563rtc_clock_write(struct pcf8563rtc_softc *sc, struct clock_ymdhms *dt)
{
uint8_t bcd[PCF8563_NREGS];
uint8_t reg = PCF8563_R_SECOND;
bcd[PCF8563_R_SECOND] = TOBCD(dt->dt_sec);
bcd[PCF8563_R_MINUTE] = TOBCD(dt->dt_min);
bcd[PCF8563_R_HOUR] = TOBCD(dt->dt_hour);
bcd[PCF8563_R_DAY] = TOBCD(dt->dt_day);
bcd[PCF8563_R_WEEKDAY] = TOBCD(dt->dt_wday);
bcd[PCF8563_R_MONTH] = TOBCD(dt->dt_mon);
bcd[PCF8563_R_YEAR] = TOBCD(dt->dt_year % 100);
if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
device_printf(sc->sc_dev, "acquire bus for write failed\n");
return 0;
}
if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, ®, 1,
&bcd[reg], PCF8563_R_YEAR - reg + 1, I2C_F_POLL)) {
iic_release_bus(sc->sc_tag, I2C_F_POLL);
device_printf(sc->sc_dev, "write failed\n");
return 0;
}
iic_release_bus(sc->sc_tag, I2C_F_POLL);
return 1;
}
|