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
|
/*
* Texas Instruments TMP105 temperature sensor.
*
* Copyright (C) 2008 Nokia Corporation
* Written by Andrzej Zaborowski <andrew@openedhand.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 or
* (at your option) version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "hw.h"
#include "i2c.h"
struct tmp105_s {
i2c_slave i2c;
int len;
uint8_t buf[2];
qemu_irq pin;
uint8_t pointer;
uint8_t config;
int16_t temperature;
int16_t limit[2];
int faults;
int alarm;
};
static void tmp105_interrupt_update(struct tmp105_s *s)
{
qemu_set_irq(s->pin, s->alarm ^ ((~s->config >> 2) & 1)); /* POL */
}
static void tmp105_alarm_update(struct tmp105_s *s)
{
if ((s->config >> 0) & 1) { /* SD */
if ((s->config >> 7) & 1) /* OS */
s->config &= ~(1 << 7); /* OS */
else
return;
}
if ((s->config >> 1) & 1) { /* TM */
if (s->temperature >= s->limit[1])
s->alarm = 1;
else if (s->temperature < s->limit[0])
s->alarm = 1;
} else {
if (s->temperature >= s->limit[1])
s->alarm = 1;
else if (s->temperature < s->limit[0])
s->alarm = 0;
}
tmp105_interrupt_update(s);
}
/* Units are 0.001 centigrades relative to 0 C. */
void tmp105_set(i2c_slave *i2c, int temp)
{
struct tmp105_s *s = (struct tmp105_s *) i2c;
if (temp >= 128000 || temp < -128000) {
fprintf(stderr, "%s: values is out of range (%i.%03i C)\n",
__FUNCTION__, temp / 1000, temp % 1000);
exit(-1);
}
s->temperature = ((int16_t) (temp * 0x800 / 128000)) << 4;
tmp105_alarm_update(s);
}
static const int tmp105_faultq[4] = { 1, 2, 4, 6 };
static void tmp105_read(struct tmp105_s *s)
{
s->len = 0;
if ((s->config >> 1) & 1) { /* TM */
s->alarm = 0;
tmp105_interrupt_update(s);
}
switch (s->pointer & 3) {
case 0: /* Temperature */
s->buf[s->len ++] = (((uint16_t) s->temperature) >> 8);
s->buf[s->len ++] = (((uint16_t) s->temperature) >> 0) &
(0xf0 << ((~s->config >> 5) & 3)); /* R */
break;
case 1: /* Configuration */
s->buf[s->len ++] = s->config;
break;
case 2: /* T_LOW */
s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 8;
s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 0;
break;
case 3: /* T_HIGH */
s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 8;
s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 0;
break;
}
}
static void tmp105_write(struct tmp105_s *s)
{
switch (s->pointer & 3) {
case 0: /* Temperature */
break;
case 1: /* Configuration */
if (s->buf[0] & ~s->config & (1 << 0)) /* SD */
printf("%s: TMP105 shutdown\n", __FUNCTION__);
s->config = s->buf[0];
s->faults = tmp105_faultq[(s->config >> 3) & 3]; /* F */
tmp105_alarm_update(s);
break;
case 2: /* T_LOW */
case 3: /* T_HIGH */
if (s->len >= 3)
s->limit[s->pointer & 1] = (int16_t)
((((uint16_t) s->buf[0]) << 8) | s->buf[1]);
tmp105_alarm_update(s);
break;
}
}
static int tmp105_rx(i2c_slave *i2c)
{
struct tmp105_s *s = (struct tmp105_s *) i2c;
if (s->len < 2)
return s->buf[s->len ++];
else
return 0xff;
}
static int tmp105_tx(i2c_slave *i2c, uint8_t data)
{
struct tmp105_s *s = (struct tmp105_s *) i2c;
if (!s->len ++)
s->pointer = data;
else {
if (s->len <= 2)
s->buf[s->len - 1] = data;
tmp105_write(s);
}
return 0;
}
static void tmp105_event(i2c_slave *i2c, enum i2c_event event)
{
struct tmp105_s *s = (struct tmp105_s *) i2c;
if (event == I2C_START_RECV)
tmp105_read(s);
s->len = 0;
}
static void tmp105_save(QEMUFile *f, void *opaque)
{
struct tmp105_s *s = (struct tmp105_s *) opaque;
qemu_put_byte(f, s->len);
qemu_put_8s(f, &s->buf[0]);
qemu_put_8s(f, &s->buf[1]);
qemu_put_8s(f, &s->pointer);
qemu_put_8s(f, &s->config);
qemu_put_sbe16s(f, &s->temperature);
qemu_put_sbe16s(f, &s->limit[0]);
qemu_put_sbe16s(f, &s->limit[1]);
qemu_put_byte(f, s->alarm);
s->faults = tmp105_faultq[(s->config >> 3) & 3]; /* F */
i2c_slave_save(f, &s->i2c);
}
static int tmp105_load(QEMUFile *f, void *opaque, int version_id)
{
struct tmp105_s *s = (struct tmp105_s *) opaque;
s->len = qemu_get_byte(f);
qemu_get_8s(f, &s->buf[0]);
qemu_get_8s(f, &s->buf[1]);
qemu_get_8s(f, &s->pointer);
qemu_get_8s(f, &s->config);
qemu_get_sbe16s(f, &s->temperature);
qemu_get_sbe16s(f, &s->limit[0]);
qemu_get_sbe16s(f, &s->limit[1]);
s->alarm = qemu_get_byte(f);
tmp105_interrupt_update(s);
i2c_slave_load(f, &s->i2c);
return 0;
}
void tmp105_reset(i2c_slave *i2c)
{
struct tmp105_s *s = (struct tmp105_s *) i2c;
s->temperature = 0;
s->pointer = 0;
s->config = 0;
s->faults = tmp105_faultq[(s->config >> 3) & 3];
s->alarm = 0;
tmp105_interrupt_update(s);
}
struct i2c_slave *tmp105_init(i2c_bus *bus, qemu_irq alarm)
{
struct tmp105_s *s = (struct tmp105_s *)
i2c_slave_init(bus, 0, sizeof(struct tmp105_s));
s->i2c.event = tmp105_event;
s->i2c.recv = tmp105_rx;
s->i2c.send = tmp105_tx;
s->pin = alarm;
tmp105_reset(&s->i2c);
register_savevm("TMP105", -1, 0, tmp105_save, tmp105_load, s);
return &s->i2c;
}
|
