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
|
/*
* This file is part of the coreboot project.
*
* 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; version 2 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.
*/
#include <delay.h>
#include <timer.h>
#include <console/console.h>
#include <device/device.h>
#include <device/i2c_bus.h>
#include "lm96000.h"
#include "chip.h"
static inline int lm96000_read(struct device *const dev, const u8 reg)
{
return i2c_dev_readb_at(dev, reg);
}
static inline int lm96000_write(struct device *const dev,
const u8 reg, const u8 value)
{
return i2c_dev_writeb_at(dev, reg, value);
}
static inline int lm96000_update(struct device *const dev, const u8 reg,
const u8 clear_mask, const u8 set_mask)
{
const int val = i2c_dev_readb_at(dev, reg);
if (val < 0)
return val;
return i2c_dev_writeb_at(dev, reg, (val & ~clear_mask) | set_mask);
}
static const unsigned int ref_mv[] = { 2500, 2250, 3300, 5000, 12000 };
static u8 lm96000_to_low_limit(const enum lm96000_vin ref, const u16 limit)
{
const unsigned int reg =
(unsigned int)limit * 0xc0 / ref_mv[ref];
return reg < 0xff ? reg : 0xff;
}
static u8 lm96000_to_high_limit(const enum lm96000_vin ref, const u16 limit)
{
const unsigned int reg =
DIV_ROUND_UP((unsigned int)limit * 0xc0, ref_mv[ref]);
return reg < 0xff ? reg : 0xff;
}
static void lm96000_set_vin_limits(struct device *const dev,
const struct drivers_i2c_lm96000_config *const config)
{
unsigned int i;
for (i = 0; i < LM96000_VIN_CNT; ++i) {
lm96000_write(dev, LM96000_VIN_LOW_LIMIT(i),
lm96000_to_low_limit(i, config->vin[i].low));
if (config->vin[i].high > config->vin[i].low)
lm96000_write(dev, LM96000_VIN_HIGH_LIMIT(i),
lm96000_to_high_limit(i, config->vin[i].high));
else
lm96000_write(dev, LM96000_VIN_HIGH_LIMIT(i), 0xff);
}
}
static void lm96000_set_temp_limits(struct device *const dev,
const struct drivers_i2c_lm96000_config *const config)
{
unsigned int i;
for (i = 0; i < LM96000_TEMP_IN_CNT; ++i) {
lm96000_write(dev, LM96000_TEMP_LOW_LIMIT(i),
config->temp_in[i].low);
if (config->temp_in[i].high > config->temp_in[i].low)
lm96000_write(dev, LM96000_TEMP_HIGH_LIMIT(i),
config->temp_in[i].high);
else
lm96000_write(dev, LM96000_TEMP_HIGH_LIMIT(i), 0x7f);
}
}
static u16 lm96000_rpm_to_tach(const u16 rpm)
{
return rpm ? (60 * 90000 / rpm) & 0xfffc : 0xfffc;
}
static void lm96000_set_fan_limits(struct device *const dev,
const struct drivers_i2c_lm96000_config *const config)
{
unsigned int i;
for (i = 0; i < LM96000_FAN_IN_CNT; ++i) {
const u16 tach = lm96000_rpm_to_tach(config->fan_in[i].low);
lm96000_write(dev, LM96000_FAN_LOW_LIMIT(i), tach & 0xff);
lm96000_write(dev, LM96000_FAN_LOW_LIMIT(i) + 1, tach >> 8);
}
}
static u8 lm96000_to_duty(const u8 duty_cycle)
{
return duty_cycle * 255 / 100;
}
static void lm96000_configure_pwm(struct device *const dev,
const unsigned int fan,
const struct lm96000_fan_config *const config)
{
lm96000_update(dev, LM96000_FAN_CFG(fan),
LM96000_FAN_CFG_MODE_MASK | LM96000_FAN_CFG_PWM_INVERT |
LM96000_FAN_CFG_SPINUP_MASK,
((config->mode << LM96000_FAN_CFG_MODE_SHIFT)
& LM96000_FAN_CFG_MODE_MASK) |
(config->invert ? LM96000_FAN_CFG_PWM_INVERT : 0) |
config->spinup);
lm96000_update(dev, LM96000_FAN_FREQ(fan),
LM96000_FAN_FREQ_MASK, config->freq);
lm96000_update(dev, LM96000_TACH_MONITOR_MODE,
LM96000_TACH_MODE_FAN_MASK(fan),
config->freq <= LM96000_PWM_94HZ
? config->tach << LM96000_TACH_MODE_FAN_SHIFT(fan) : 0);
switch (config->mode) {
case LM96000_FAN_ZONE_1_AUTO:
case LM96000_FAN_ZONE_2_AUTO:
case LM96000_FAN_ZONE_3_AUTO:
case LM96000_FAN_HOTTEST_23:
case LM96000_FAN_HOTTEST_123:
lm96000_write(dev, LM96000_FAN_MIN_PWM(fan),
lm96000_to_duty(config->min_duty));
break;
case LM96000_FAN_MANUAL:
lm96000_write(dev, LM96000_FAN_DUTY(fan),
lm96000_to_duty(config->duty_cycle));
break;
default:
break;
}
}
static void lm96000_configure_temp_zone(struct device *const dev,
const unsigned int zone,
const struct lm96000_temp_zone *const config)
{
static const u8 temp_range[] =
{ 2, 3, 3, 4, 5, 7, 8, 10, 13, 16, 20, 27, 32, 40, 53, 80 };
unsigned int i;
/* find longest range that starts from `low_temp` */
for (i = ARRAY_SIZE(temp_range) - 1; i > 0; --i) {
if (config->low_temp + temp_range[i] <= config->target_temp)
break;
}
lm96000_update(dev, LM96000_ZONE_RANGE(zone),
LM96000_ZONE_RANGE_MASK, i << LM96000_ZONE_RANGE_SHIFT);
lm96000_write(dev, LM96000_ZONE_TEMP_LOW(zone),
config->target_temp >= temp_range[i]
? config->target_temp - temp_range[i]
: 0);
lm96000_write(dev, LM96000_ZONE_TEMP_PANIC(zone),
config->panic_temp ? config->panic_temp : 100);
lm96000_update(dev, LM96000_ZONE_SMOOTH(zone),
LM96000_ZONE_SMOOTH_MASK(zone),
LM96000_ZONE_SMOOTH_EN(zone) | 0); /* 0: 35s */
lm96000_update(dev, LM96000_FAN_MIN_OFF,
LM96000_FAN_MIN(zone),
config->min_off ? LM96000_FAN_MIN(zone) : 0);
lm96000_update(dev, LM96000_ZONE_HYSTERESIS(zone),
LM96000_ZONE_HYST_MASK(zone),
config->hysteresis << LM96000_ZONE_HYST_SHIFT(zone)
& LM96000_ZONE_HYST_MASK(zone));
}
static void lm96000_init(struct device *const dev)
{
const struct drivers_i2c_lm96000_config *const config = dev->chip_info;
unsigned int i;
int lm_config;
struct stopwatch sw;
printk(BIOS_DEBUG, "lm96000: Initialization hardware monitoring.\n");
stopwatch_init_msecs_expire(&sw, 1000);
lm_config = lm96000_read(dev, LM96000_CONFIG);
while ((lm_config < 0 || !((unsigned int)lm_config & LM96000_READY))) {
mdelay(1);
lm_config = lm96000_read(dev, LM96000_CONFIG);
if (stopwatch_expired(&sw))
break;
}
if (lm_config < 0 || !((unsigned int)lm_config & LM96000_READY)) {
printk(BIOS_INFO, "lm96000: Not ready after 1s.\n");
return;
}
lm96000_set_vin_limits(dev, config);
lm96000_set_temp_limits(dev, config);
lm96000_set_fan_limits(dev, config);
for (i = 0; i < LM96000_PWM_CTL_CNT; ++i) {
if (config->fan[i].mode != LM96000_FAN_IGNORE)
lm96000_configure_pwm(dev, i, config->fan + i);
}
for (i = 0; i < LM96000_TEMP_ZONE_CNT; ++i)
lm96000_configure_temp_zone(dev, i, config->zone + i);
lm96000_update(dev, LM96000_CONFIG, 0, LM96000_START);
}
static struct device_operations lm96000_ops = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
.init = lm96000_init,
};
static void lm96000_enable(struct device *const dev)
{
dev->ops = &lm96000_ops;
}
struct chip_operations drivers_i2c_lm96000_ops = {
CHIP_NAME("LM96000")
.enable_dev = lm96000_enable
};
|
