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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
/* $OpenBSD: dsrtc.c,v 1.3 2006/05/26 20:34:03 miod Exp $ */
/* $NetBSD: dsrtc.c,v 1.5 2003/03/23 14:12:26 chris Exp $ */
/*
* Copyright (c) 1998 Mark Brinicombe.
* Copyright (c) 1998 Causality Limited.
* All rights reserved.
*
* Written by Mark Brinicombe, Causality Limited
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe
* for the NetBSD Project.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CAUASLITY LIMITED ``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 CAUSALITY LIMITED 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <arm/footbridge/todclockvar.h>
#include <arm/footbridge/isa/ds1687reg.h>
#include <dev/isa/isavar.h>
#define NRTC_PORTS 2
struct dsrtc_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
void dsrtcattach (struct device *parent, struct device *self, void *aux);
int dsrtcmatch (struct device *parent, void *cf, void *aux);
int ds1687_read (struct dsrtc_softc *sc, int addr);
void ds1687_write (struct dsrtc_softc *sc, int addr, int data);
int ds1687_ram_read (struct dsrtc_softc *sc, int addr);
void ds1687_ram_write (struct dsrtc_softc *sc, int addr, int data);
static void ds1687_bank_select (struct dsrtc_softc *, int);
static int dsrtc_write (void *, rtc_t *);
static int dsrtc_read (void *, rtc_t *);
int
ds1687_read(sc, addr)
struct dsrtc_softc *sc;
int addr;
{
bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_ADDR_REG, addr);
return(bus_space_read_1(sc->sc_iot, sc->sc_ioh, RTC_DATA_REG));
}
void
ds1687_write(sc, addr, data)
struct dsrtc_softc *sc;
int addr;
int data;
{
bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_ADDR_REG, addr);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_DATA_REG, data);
}
static void
ds1687_bank_select(sc, bank)
struct dsrtc_softc *sc;
int bank;
{
int data;
data = ds1687_read(sc, RTC_REG_A);
data &= ~RTC_REG_A_BANK_MASK;
if (bank)
data |= RTC_REG_A_BANK1;
ds1687_write(sc, RTC_REG_A, data);
}
#if 0
/* Nothing uses these yet */
int
ds1687_ram_read(sc, addr)
struct dsrtc_softc *sc;
int addr;
{
if (addr < RTC_PC_RAM_SIZE)
return(ds1687_read(sc, RTC_PC_RAM_START + addr));
addr -= RTC_PC_RAM_SIZE;
if (addr < RTC_BANK0_RAM_SIZE)
return(ds1687_read(sc, RTC_BANK0_RAM_START + addr));
addr -= RTC_BANK0_RAM_SIZE;
if (addr < RTC_EXT_RAM_SIZE) {
int data;
ds1687_bank_select(sc, 1);
ds1687_write(sc, RTC_EXT_RAM_ADDRESS, addr);
data = ds1687_read(sc, RTC_EXT_RAM_DATA);
ds1687_bank_select(sc, 0);
return(data);
}
return(-1);
}
void
ds1687_ram_write(sc, addr, val)
struct dsrtc_softc *sc;
int addr;
int val;
{
if (addr < RTC_PC_RAM_SIZE)
return(ds1687_write(sc, RTC_PC_RAM_START + addr, val));
addr -= RTC_PC_RAM_SIZE;
if (addr < RTC_BANK0_RAM_SIZE)
return(ds1687_write(sc, RTC_BANK0_RAM_START + addr, val));
addr -= RTC_BANK0_RAM_SIZE;
if (addr < RTC_EXT_RAM_SIZE) {
ds1687_bank_select(sc, 1);
ds1687_write(sc, RTC_EXT_RAM_ADDRESS, addr);
ds1687_write(sc, RTC_EXT_RAM_DATA, val);
ds1687_bank_select(sc, 0);
}
}
#endif
static int
dsrtc_write(arg, rtc)
void *arg;
rtc_t *rtc;
{
struct dsrtc_softc *sc = arg;
ds1687_write(sc, RTC_SECONDS, rtc->rtc_sec);
ds1687_write(sc, RTC_MINUTES, rtc->rtc_min);
ds1687_write(sc, RTC_HOURS, rtc->rtc_hour);
ds1687_write(sc, RTC_DAYOFMONTH, rtc->rtc_day);
ds1687_write(sc, RTC_MONTH, rtc->rtc_mon);
ds1687_write(sc, RTC_YEAR, rtc->rtc_year);
ds1687_bank_select(sc, 1);
ds1687_write(sc, RTC_CENTURY, rtc->rtc_cen);
ds1687_bank_select(sc, 0);
return(1);
}
static int
dsrtc_read(arg, rtc)
void *arg;
rtc_t *rtc;
{
struct dsrtc_softc *sc = arg;
rtc->rtc_micro = 0;
rtc->rtc_centi = 0;
rtc->rtc_sec = ds1687_read(sc, RTC_SECONDS);
rtc->rtc_min = ds1687_read(sc, RTC_MINUTES);
rtc->rtc_hour = ds1687_read(sc, RTC_HOURS);
rtc->rtc_day = ds1687_read(sc, RTC_DAYOFMONTH);
rtc->rtc_mon = ds1687_read(sc, RTC_MONTH);
rtc->rtc_year = ds1687_read(sc, RTC_YEAR);
ds1687_bank_select(sc, 1);
rtc->rtc_cen = ds1687_read(sc, RTC_CENTURY);
ds1687_bank_select(sc, 0);
return(1);
}
/* device and attach structures */
struct cfattach ds1687rtc_ca = {
sizeof(struct dsrtc_softc), dsrtcmatch, dsrtcattach
};
struct cfdriver ds1687rtc_cd = {
NULL, "dsrtc", DV_DULL
};
/*
* dsrtcmatch()
*
* Validate the IIC address to make sure its an RTC we understand
*/
int
dsrtcmatch(parent, cf, aux)
struct device *parent;
void *cf;
void *aux;
{
struct isa_attach_args *ia = aux;
#ifdef __NetBSD__
if (ia->ia_nio < 1 ||
ia->ia_iobase == -1)
return (0);
ia->ia_nio = 1;
ia->ia_io[0].ir_size = NRTC_PORTS;
#else
ia->ia_iosize = NRTC_PORTS;
#endif
#if 0
ia->ia_niomem = 0;
ia->ia_nirq = 0;
ia->ia_ndrq = 0;
#endif
return(1);
}
/*
* dsrtcattach()
*
* Attach the rtc device
*/
void
dsrtcattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct dsrtc_softc *sc = (struct dsrtc_softc *)self;
struct isa_attach_args *ia = aux;
struct todclock_attach_args ta;
sc->sc_iot = ia->ia_iot;
if (bus_space_map(sc->sc_iot, ia->ia_iobase,
ia->ia_iosize, 0, &sc->sc_ioh)) {
printf(": cannot map I/O space\n");
return;
}
ds1687_write(sc, RTC_REG_A, RTC_REG_A_DV1);
ds1687_write(sc, RTC_REG_B, RTC_REG_B_BINARY | RTC_REG_B_24_HOUR);
if (!(ds1687_read(sc, RTC_REG_D) & RTC_REG_D_VRT))
printf(": lithium cell is dead, RTC unreliable");
printf("\n");
ta.ta_name = "todclock";
ta.ta_rtc_arg = sc;
ta.ta_rtc_write = dsrtc_write;
ta.ta_rtc_read = dsrtc_read;
ta.ta_flags = 0;
config_found(self, &ta, NULL);
}
/* End of dsrtc.c */
|
