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1da177e4 LT |
1 | /* |
2 | * lm80.c - From lm_sensors, Linux kernel modules for hardware | |
1160631b | 3 | * monitoring |
1da177e4 | 4 | * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> |
1160631b | 5 | * and Philip Edelbrock <phil@netroedge.com> |
1da177e4 LT |
6 | * |
7 | * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/i2c.h> | |
943b0830 | 29 | #include <linux/hwmon.h> |
f8181762 | 30 | #include <linux/hwmon-sysfs.h> |
943b0830 | 31 | #include <linux/err.h> |
9a61bf63 | 32 | #include <linux/mutex.h> |
1da177e4 LT |
33 | |
34 | /* Addresses to scan */ | |
25e9c86d MH |
35 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
36 | 0x2e, 0x2f, I2C_CLIENT_END }; | |
1da177e4 | 37 | |
1da177e4 LT |
38 | /* Many LM80 constants specified below */ |
39 | ||
40 | /* The LM80 registers */ | |
41 | #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2) | |
42 | #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2) | |
43 | #define LM80_REG_IN(nr) (0x20 + (nr)) | |
44 | ||
45 | #define LM80_REG_FAN1 0x28 | |
46 | #define LM80_REG_FAN2 0x29 | |
47 | #define LM80_REG_FAN_MIN(nr) (0x3b + (nr)) | |
48 | ||
49 | #define LM80_REG_TEMP 0x27 | |
50 | #define LM80_REG_TEMP_HOT_MAX 0x38 | |
51 | #define LM80_REG_TEMP_HOT_HYST 0x39 | |
52 | #define LM80_REG_TEMP_OS_MAX 0x3a | |
53 | #define LM80_REG_TEMP_OS_HYST 0x3b | |
54 | ||
55 | #define LM80_REG_CONFIG 0x00 | |
56 | #define LM80_REG_ALARM1 0x01 | |
57 | #define LM80_REG_ALARM2 0x02 | |
58 | #define LM80_REG_MASK1 0x03 | |
59 | #define LM80_REG_MASK2 0x04 | |
60 | #define LM80_REG_FANDIV 0x05 | |
61 | #define LM80_REG_RES 0x06 | |
62 | ||
9908ad4c JD |
63 | #define LM96080_REG_CONV_RATE 0x07 |
64 | #define LM96080_REG_MAN_ID 0x3e | |
65 | #define LM96080_REG_DEV_ID 0x3f | |
66 | ||
1da177e4 | 67 | |
1160631b GR |
68 | /* |
69 | * Conversions. Rounding and limit checking is only done on the TO_REG | |
70 | * variants. Note that you should be a bit careful with which arguments | |
71 | * these macros are called: arguments may be evaluated more than once. | |
72 | * Fixing this is just not worth it. | |
73 | */ | |
1da177e4 | 74 | |
2a844c14 | 75 | #define IN_TO_REG(val) (clamp_val(((val) + 5) / 10, 0, 255)) |
66b3b1f7 | 76 | #define IN_FROM_REG(val) ((val) * 10) |
1da177e4 LT |
77 | |
78 | static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div) | |
79 | { | |
80 | if (rpm == 0) | |
81 | return 255; | |
2a844c14 GR |
82 | rpm = clamp_val(rpm, 1, 1000000); |
83 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
1da177e4 LT |
84 | } |
85 | ||
66b3b1f7 FM |
86 | #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ |
87 | (val) == 255 ? 0 : 1350000/((div) * (val))) | |
1da177e4 | 88 | |
688a3174 GR |
89 | #define TEMP_FROM_REG(reg) ((reg) * 125 / 32) |
90 | #define TEMP_TO_REG(temp) (DIV_ROUND_CLOSEST(clamp_val((temp), \ | |
91 | -128000, 127000), 1000) << 8) | |
1da177e4 LT |
92 | |
93 | #define DIV_FROM_REG(val) (1 << (val)) | |
94 | ||
9711bcdd GR |
95 | enum temp_index { |
96 | t_input = 0, | |
97 | t_hot_max, | |
98 | t_hot_hyst, | |
99 | t_os_max, | |
100 | t_os_hyst, | |
101 | t_num_temp | |
102 | }; | |
103 | ||
104 | static const u8 temp_regs[t_num_temp] = { | |
105 | [t_input] = LM80_REG_TEMP, | |
106 | [t_hot_max] = LM80_REG_TEMP_HOT_MAX, | |
107 | [t_hot_hyst] = LM80_REG_TEMP_HOT_HYST, | |
108 | [t_os_max] = LM80_REG_TEMP_OS_MAX, | |
109 | [t_os_hyst] = LM80_REG_TEMP_OS_HYST, | |
110 | }; | |
111 | ||
1adf3a3e GR |
112 | enum in_index { |
113 | i_input = 0, | |
114 | i_max, | |
115 | i_min, | |
116 | i_num_in | |
117 | }; | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Client data (each client gets its own) | |
121 | */ | |
122 | ||
123 | struct lm80_data { | |
118c9a61 | 124 | struct i2c_client *client; |
9a61bf63 | 125 | struct mutex update_lock; |
96585f1a | 126 | char error; /* !=0 if error occurred during last update */ |
1da177e4 LT |
127 | char valid; /* !=0 if following fields are valid */ |
128 | unsigned long last_updated; /* In jiffies */ | |
129 | ||
1adf3a3e | 130 | u8 in[i_num_in][7]; /* Register value, 1st index is enum in_index */ |
1da177e4 LT |
131 | u8 fan[2]; /* Register value */ |
132 | u8 fan_min[2]; /* Register value */ | |
133 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
9711bcdd | 134 | s16 temp[t_num_temp]; /* Register values, normalized to 16 bit */ |
1da177e4 LT |
135 | u16 alarms; /* Register encoding, combined */ |
136 | }; | |
137 | ||
6cc37ee5 | 138 | /* |
1da177e4 LT |
139 | * Functions declaration |
140 | */ | |
141 | ||
8c8bacc8 JD |
142 | static int lm80_probe(struct i2c_client *client, |
143 | const struct i2c_device_id *id); | |
310ec792 | 144 | static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info); |
1da177e4 | 145 | static void lm80_init_client(struct i2c_client *client); |
1da177e4 LT |
146 | static struct lm80_data *lm80_update_device(struct device *dev); |
147 | static int lm80_read_value(struct i2c_client *client, u8 reg); | |
148 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value); | |
149 | ||
150 | /* | |
151 | * Driver data (common to all clients) | |
152 | */ | |
153 | ||
8c8bacc8 | 154 | static const struct i2c_device_id lm80_id[] = { |
1f86df49 | 155 | { "lm80", 0 }, |
9908ad4c | 156 | { "lm96080", 1 }, |
8c8bacc8 JD |
157 | { } |
158 | }; | |
159 | MODULE_DEVICE_TABLE(i2c, lm80_id); | |
160 | ||
1da177e4 | 161 | static struct i2c_driver lm80_driver = { |
8c8bacc8 | 162 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 163 | .driver = { |
cdaf7934 LR |
164 | .name = "lm80", |
165 | }, | |
8c8bacc8 | 166 | .probe = lm80_probe, |
8c8bacc8 JD |
167 | .id_table = lm80_id, |
168 | .detect = lm80_detect, | |
c3813d6a | 169 | .address_list = normal_i2c, |
1da177e4 LT |
170 | }; |
171 | ||
172 | /* | |
173 | * Sysfs stuff | |
174 | */ | |
175 | ||
1adf3a3e GR |
176 | static ssize_t show_in(struct device *dev, struct device_attribute *attr, |
177 | char *buf) | |
178 | { | |
179 | struct lm80_data *data = lm80_update_device(dev); | |
180 | int index = to_sensor_dev_attr_2(attr)->index; | |
181 | int nr = to_sensor_dev_attr_2(attr)->nr; | |
182 | ||
183 | if (IS_ERR(data)) | |
184 | return PTR_ERR(data); | |
185 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr][index])); | |
1da177e4 | 186 | } |
1da177e4 | 187 | |
1adf3a3e GR |
188 | static ssize_t set_in(struct device *dev, struct device_attribute *attr, |
189 | const char *buf, size_t count) | |
190 | { | |
191 | struct lm80_data *data = dev_get_drvdata(dev); | |
192 | struct i2c_client *client = data->client; | |
193 | int index = to_sensor_dev_attr_2(attr)->index; | |
194 | int nr = to_sensor_dev_attr_2(attr)->nr; | |
195 | long val; | |
196 | u8 reg; | |
197 | int err = kstrtol(buf, 10, &val); | |
198 | if (err < 0) | |
199 | return err; | |
200 | ||
201 | reg = nr == i_min ? LM80_REG_IN_MIN(index) : LM80_REG_IN_MAX(index); | |
202 | ||
203 | mutex_lock(&data->update_lock); | |
204 | data->in[nr][index] = IN_TO_REG(val); | |
205 | lm80_write_value(client, reg, data->in[nr][index]); | |
206 | mutex_unlock(&data->update_lock); | |
207 | return count; | |
1da177e4 | 208 | } |
f8181762 JD |
209 | |
210 | #define show_fan(suffix, value) \ | |
66b3b1f7 FM |
211 | static ssize_t show_fan_##suffix(struct device *dev, \ |
212 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 213 | { \ |
f8181762 | 214 | int nr = to_sensor_dev_attr(attr)->index; \ |
1da177e4 | 215 | struct lm80_data *data = lm80_update_device(dev); \ |
2faaa931 FM |
216 | if (IS_ERR(data)) \ |
217 | return PTR_ERR(data); \ | |
f8181762 JD |
218 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \ |
219 | DIV_FROM_REG(data->fan_div[nr]))); \ | |
1da177e4 | 220 | } |
f8181762 JD |
221 | show_fan(min, fan_min) |
222 | show_fan(input, fan) | |
1da177e4 | 223 | |
f8181762 JD |
224 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, |
225 | char *buf) | |
226 | { | |
227 | int nr = to_sensor_dev_attr(attr)->index; | |
228 | struct lm80_data *data = lm80_update_device(dev); | |
2faaa931 FM |
229 | if (IS_ERR(data)) |
230 | return PTR_ERR(data); | |
f8181762 | 231 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); |
1da177e4 | 232 | } |
1da177e4 | 233 | |
f8181762 JD |
234 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, |
235 | const char *buf, size_t count) | |
236 | { | |
237 | int nr = to_sensor_dev_attr(attr)->index; | |
118c9a61 GR |
238 | struct lm80_data *data = dev_get_drvdata(dev); |
239 | struct i2c_client *client = data->client; | |
6a9e7c4c FM |
240 | unsigned long val; |
241 | int err = kstrtoul(buf, 10, &val); | |
242 | if (err < 0) | |
243 | return err; | |
f8181762 JD |
244 | |
245 | mutex_lock(&data->update_lock); | |
246 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); | |
247 | lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]); | |
248 | mutex_unlock(&data->update_lock); | |
249 | return count; | |
1da177e4 | 250 | } |
1da177e4 | 251 | |
1160631b GR |
252 | /* |
253 | * Note: we save and restore the fan minimum here, because its value is | |
254 | * determined in part by the fan divisor. This follows the principle of | |
255 | * least surprise; the user doesn't expect the fan minimum to change just | |
256 | * because the divisor changed. | |
257 | */ | |
f8181762 JD |
258 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, |
259 | const char *buf, size_t count) | |
1da177e4 | 260 | { |
f8181762 | 261 | int nr = to_sensor_dev_attr(attr)->index; |
118c9a61 GR |
262 | struct lm80_data *data = dev_get_drvdata(dev); |
263 | struct i2c_client *client = data->client; | |
6a9e7c4c | 264 | unsigned long min, val; |
1da177e4 | 265 | u8 reg; |
6a9e7c4c FM |
266 | int err = kstrtoul(buf, 10, &val); |
267 | if (err < 0) | |
268 | return err; | |
1da177e4 LT |
269 | |
270 | /* Save fan_min */ | |
9a61bf63 | 271 | mutex_lock(&data->update_lock); |
1da177e4 LT |
272 | min = FAN_FROM_REG(data->fan_min[nr], |
273 | DIV_FROM_REG(data->fan_div[nr])); | |
274 | ||
275 | switch (val) { | |
66b3b1f7 FM |
276 | case 1: |
277 | data->fan_div[nr] = 0; | |
278 | break; | |
279 | case 2: | |
280 | data->fan_div[nr] = 1; | |
281 | break; | |
282 | case 4: | |
283 | data->fan_div[nr] = 2; | |
284 | break; | |
285 | case 8: | |
286 | data->fan_div[nr] = 3; | |
287 | break; | |
1da177e4 | 288 | default: |
118c9a61 | 289 | dev_err(dev, |
b55f3757 GR |
290 | "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", |
291 | val); | |
9a61bf63 | 292 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
293 | return -EINVAL; |
294 | } | |
295 | ||
296 | reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1)))) | |
297 | | (data->fan_div[nr] << (2 * (nr + 1))); | |
298 | lm80_write_value(client, LM80_REG_FANDIV, reg); | |
299 | ||
300 | /* Restore fan_min */ | |
301 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
302 | lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]); | |
9a61bf63 | 303 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
304 | |
305 | return count; | |
306 | } | |
307 | ||
9711bcdd GR |
308 | static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, |
309 | char *buf) | |
1da177e4 | 310 | { |
9711bcdd | 311 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 312 | struct lm80_data *data = lm80_update_device(dev); |
2faaa931 FM |
313 | if (IS_ERR(data)) |
314 | return PTR_ERR(data); | |
9711bcdd | 315 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index])); |
1da177e4 LT |
316 | } |
317 | ||
9711bcdd GR |
318 | static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, |
319 | const char *buf, size_t count) | |
320 | { | |
321 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
322 | struct lm80_data *data = dev_get_drvdata(dev); | |
323 | struct i2c_client *client = data->client; | |
324 | int nr = attr->index; | |
325 | long val; | |
326 | int err = kstrtol(buf, 10, &val); | |
327 | if (err < 0) | |
328 | return err; | |
1da177e4 | 329 | |
9711bcdd GR |
330 | mutex_lock(&data->update_lock); |
331 | data->temp[nr] = TEMP_TO_REG(val); | |
332 | lm80_write_value(client, temp_regs[nr], data->temp[nr] >> 8); | |
333 | mutex_unlock(&data->update_lock); | |
334 | return count; | |
1da177e4 | 335 | } |
1da177e4 | 336 | |
6cc37ee5 JD |
337 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, |
338 | char *buf) | |
1da177e4 LT |
339 | { |
340 | struct lm80_data *data = lm80_update_device(dev); | |
2faaa931 FM |
341 | if (IS_ERR(data)) |
342 | return PTR_ERR(data); | |
1da177e4 LT |
343 | return sprintf(buf, "%u\n", data->alarms); |
344 | } | |
345 | ||
e84542f5 JD |
346 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
347 | char *buf) | |
348 | { | |
349 | int bitnr = to_sensor_dev_attr(attr)->index; | |
350 | struct lm80_data *data = lm80_update_device(dev); | |
2faaa931 FM |
351 | if (IS_ERR(data)) |
352 | return PTR_ERR(data); | |
e84542f5 JD |
353 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
354 | } | |
355 | ||
1adf3a3e GR |
356 | static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, |
357 | show_in, set_in, i_min, 0); | |
358 | static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, | |
359 | show_in, set_in, i_min, 1); | |
360 | static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, | |
361 | show_in, set_in, i_min, 2); | |
362 | static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, | |
363 | show_in, set_in, i_min, 3); | |
364 | static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, | |
365 | show_in, set_in, i_min, 4); | |
366 | static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, | |
367 | show_in, set_in, i_min, 5); | |
368 | static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, | |
369 | show_in, set_in, i_min, 6); | |
370 | static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, | |
371 | show_in, set_in, i_max, 0); | |
372 | static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, | |
373 | show_in, set_in, i_max, 1); | |
374 | static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, | |
375 | show_in, set_in, i_max, 2); | |
376 | static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, | |
377 | show_in, set_in, i_max, 3); | |
378 | static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, | |
379 | show_in, set_in, i_max, 4); | |
380 | static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, | |
381 | show_in, set_in, i_max, 5); | |
382 | static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, | |
383 | show_in, set_in, i_max, 6); | |
384 | static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, i_input, 0); | |
385 | static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, i_input, 1); | |
386 | static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, i_input, 2); | |
387 | static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, i_input, 3); | |
388 | static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, i_input, 4); | |
389 | static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, i_input, 5); | |
390 | static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, i_input, 6); | |
f8181762 JD |
391 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, |
392 | show_fan_min, set_fan_min, 0); | |
393 | static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, | |
394 | show_fan_min, set_fan_min, 1); | |
395 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); | |
396 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); | |
397 | static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, | |
398 | show_fan_div, set_fan_div, 0); | |
399 | static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, | |
400 | show_fan_div, set_fan_div, 1); | |
9711bcdd GR |
401 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input); |
402 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp, | |
403 | set_temp, t_hot_max); | |
404 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp, | |
405 | set_temp, t_hot_hyst); | |
406 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp, | |
407 | set_temp, t_os_max); | |
408 | static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp, | |
409 | set_temp, t_os_hyst); | |
1da177e4 | 410 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
e84542f5 JD |
411 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
412 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
413 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
414 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
415 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4); | |
416 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5); | |
417 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); | |
418 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10); | |
419 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11); | |
420 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8); | |
421 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13); | |
1da177e4 LT |
422 | |
423 | /* | |
424 | * Real code | |
425 | */ | |
426 | ||
118c9a61 | 427 | static struct attribute *lm80_attrs[] = { |
f8181762 JD |
428 | &sensor_dev_attr_in0_min.dev_attr.attr, |
429 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
430 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
431 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
432 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
433 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
434 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
435 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
436 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
437 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
438 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
439 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
440 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
441 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
442 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
443 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
444 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
445 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
446 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
447 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
448 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
449 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
450 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
451 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
452 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
453 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
454 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
9711bcdd GR |
455 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
456 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
457 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
458 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
459 | &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, | |
0501a381 | 460 | &dev_attr_alarms.attr, |
e84542f5 JD |
461 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
462 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
463 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
464 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
465 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
466 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
467 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
468 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, | |
469 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, | |
470 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
471 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
0501a381 MH |
472 | NULL |
473 | }; | |
118c9a61 | 474 | ATTRIBUTE_GROUPS(lm80); |
0501a381 | 475 | |
8c8bacc8 | 476 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 477 | static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info) |
1da177e4 | 478 | { |
8c8bacc8 | 479 | struct i2c_adapter *adapter = client->adapter; |
9908ad4c JD |
480 | int i, cur, man_id, dev_id; |
481 | const char *name = NULL; | |
1da177e4 LT |
482 | |
483 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
8c8bacc8 | 484 | return -ENODEV; |
1da177e4 | 485 | |
9908ad4c JD |
486 | /* First check for unused bits, common to both chip types */ |
487 | if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0) | |
488 | || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80)) | |
8c8bacc8 | 489 | return -ENODEV; |
9908ad4c JD |
490 | |
491 | /* | |
492 | * The LM96080 has manufacturer and stepping/die rev registers so we | |
493 | * can just check that. The LM80 does not have such registers so we | |
494 | * have to use a more expensive trick. | |
495 | */ | |
496 | man_id = lm80_read_value(client, LM96080_REG_MAN_ID); | |
497 | dev_id = lm80_read_value(client, LM96080_REG_DEV_ID); | |
498 | if (man_id == 0x01 && dev_id == 0x08) { | |
499 | /* Check more unused bits for confirmation */ | |
500 | if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe) | |
66b3b1f7 | 501 | return -ENODEV; |
9908ad4c JD |
502 | |
503 | name = "lm96080"; | |
504 | } else { | |
505 | /* Check 6-bit addressing */ | |
506 | for (i = 0x2a; i <= 0x3d; i++) { | |
507 | cur = i2c_smbus_read_byte_data(client, i); | |
508 | if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur) | |
509 | || (i2c_smbus_read_byte_data(client, i + 0x80) != cur) | |
510 | || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur)) | |
511 | return -ENODEV; | |
512 | } | |
513 | ||
514 | name = "lm80"; | |
1da177e4 LT |
515 | } |
516 | ||
9908ad4c | 517 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1da177e4 | 518 | |
8c8bacc8 JD |
519 | return 0; |
520 | } | |
1da177e4 | 521 | |
8c8bacc8 JD |
522 | static int lm80_probe(struct i2c_client *client, |
523 | const struct i2c_device_id *id) | |
524 | { | |
118c9a61 GR |
525 | struct device *dev = &client->dev; |
526 | struct device *hwmon_dev; | |
8c8bacc8 | 527 | struct lm80_data *data; |
8c8bacc8 | 528 | |
118c9a61 | 529 | data = devm_kzalloc(dev, sizeof(struct lm80_data), GFP_KERNEL); |
c38b2820 GR |
530 | if (!data) |
531 | return -ENOMEM; | |
8c8bacc8 | 532 | |
118c9a61 | 533 | data->client = client; |
8c8bacc8 | 534 | mutex_init(&data->update_lock); |
1da177e4 LT |
535 | |
536 | /* Initialize the LM80 chip */ | |
6cc37ee5 | 537 | lm80_init_client(client); |
1da177e4 LT |
538 | |
539 | /* A few vars need to be filled upon startup */ | |
6cc37ee5 JD |
540 | data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1)); |
541 | data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2)); | |
1da177e4 | 542 | |
118c9a61 GR |
543 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
544 | data, lm80_groups); | |
943b0830 | 545 | |
118c9a61 | 546 | return PTR_ERR_OR_ZERO(hwmon_dev); |
1da177e4 LT |
547 | } |
548 | ||
549 | static int lm80_read_value(struct i2c_client *client, u8 reg) | |
550 | { | |
551 | return i2c_smbus_read_byte_data(client, reg); | |
552 | } | |
553 | ||
554 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value) | |
555 | { | |
556 | return i2c_smbus_write_byte_data(client, reg, value); | |
557 | } | |
558 | ||
559 | /* Called when we have found a new LM80. */ | |
560 | static void lm80_init_client(struct i2c_client *client) | |
561 | { | |
1160631b GR |
562 | /* |
563 | * Reset all except Watchdog values and last conversion values | |
564 | * This sets fan-divs to 2, among others. This makes most other | |
565 | * initializations unnecessary | |
566 | */ | |
1da177e4 LT |
567 | lm80_write_value(client, LM80_REG_CONFIG, 0x80); |
568 | /* Set 11-bit temperature resolution */ | |
569 | lm80_write_value(client, LM80_REG_RES, 0x08); | |
570 | ||
571 | /* Start monitoring */ | |
572 | lm80_write_value(client, LM80_REG_CONFIG, 0x01); | |
573 | } | |
574 | ||
575 | static struct lm80_data *lm80_update_device(struct device *dev) | |
576 | { | |
118c9a61 GR |
577 | struct lm80_data *data = dev_get_drvdata(dev); |
578 | struct i2c_client *client = data->client; | |
1da177e4 | 579 | int i; |
2faaa931 FM |
580 | int rv; |
581 | int prev_rv; | |
582 | struct lm80_data *ret = data; | |
1da177e4 | 583 | |
9a61bf63 | 584 | mutex_lock(&data->update_lock); |
1da177e4 | 585 | |
96585f1a FM |
586 | if (data->error) |
587 | lm80_init_client(client); | |
588 | ||
1da177e4 | 589 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
118c9a61 | 590 | dev_dbg(dev, "Starting lm80 update\n"); |
1da177e4 | 591 | for (i = 0; i <= 6; i++) { |
2faaa931 FM |
592 | rv = lm80_read_value(client, LM80_REG_IN(i)); |
593 | if (rv < 0) | |
594 | goto abort; | |
1adf3a3e | 595 | data->in[i_input][i] = rv; |
2faaa931 FM |
596 | |
597 | rv = lm80_read_value(client, LM80_REG_IN_MIN(i)); | |
598 | if (rv < 0) | |
599 | goto abort; | |
1adf3a3e | 600 | data->in[i_min][i] = rv; |
2faaa931 FM |
601 | |
602 | rv = lm80_read_value(client, LM80_REG_IN_MAX(i)); | |
603 | if (rv < 0) | |
604 | goto abort; | |
1adf3a3e | 605 | data->in[i_max][i] = rv; |
1da177e4 | 606 | } |
2faaa931 FM |
607 | |
608 | rv = lm80_read_value(client, LM80_REG_FAN1); | |
609 | if (rv < 0) | |
610 | goto abort; | |
611 | data->fan[0] = rv; | |
612 | ||
613 | rv = lm80_read_value(client, LM80_REG_FAN_MIN(1)); | |
614 | if (rv < 0) | |
615 | goto abort; | |
616 | data->fan_min[0] = rv; | |
617 | ||
618 | rv = lm80_read_value(client, LM80_REG_FAN2); | |
619 | if (rv < 0) | |
620 | goto abort; | |
621 | data->fan[1] = rv; | |
622 | ||
623 | rv = lm80_read_value(client, LM80_REG_FAN_MIN(2)); | |
624 | if (rv < 0) | |
625 | goto abort; | |
626 | data->fan_min[1] = rv; | |
627 | ||
628 | prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP); | |
629 | if (rv < 0) | |
630 | goto abort; | |
631 | rv = lm80_read_value(client, LM80_REG_RES); | |
632 | if (rv < 0) | |
633 | goto abort; | |
9711bcdd | 634 | data->temp[t_input] = (prev_rv << 8) | (rv & 0xf0); |
2faaa931 | 635 | |
9711bcdd GR |
636 | for (i = t_input + 1; i < t_num_temp; i++) { |
637 | rv = lm80_read_value(client, temp_regs[i]); | |
638 | if (rv < 0) | |
639 | goto abort; | |
640 | data->temp[i] = rv << 8; | |
641 | } | |
2faaa931 FM |
642 | |
643 | rv = lm80_read_value(client, LM80_REG_FANDIV); | |
644 | if (rv < 0) | |
645 | goto abort; | |
646 | data->fan_div[0] = (rv >> 2) & 0x03; | |
647 | data->fan_div[1] = (rv >> 4) & 0x03; | |
648 | ||
649 | prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1); | |
650 | if (rv < 0) | |
651 | goto abort; | |
652 | rv = lm80_read_value(client, LM80_REG_ALARM2); | |
653 | if (rv < 0) | |
654 | goto abort; | |
655 | data->alarms = prev_rv + (rv << 8); | |
656 | ||
1da177e4 LT |
657 | data->last_updated = jiffies; |
658 | data->valid = 1; | |
96585f1a | 659 | data->error = 0; |
1da177e4 | 660 | } |
2faaa931 FM |
661 | goto done; |
662 | ||
663 | abort: | |
664 | ret = ERR_PTR(rv); | |
665 | data->valid = 0; | |
96585f1a | 666 | data->error = 1; |
1da177e4 | 667 | |
2faaa931 | 668 | done: |
9a61bf63 | 669 | mutex_unlock(&data->update_lock); |
1da177e4 | 670 | |
2faaa931 | 671 | return ret; |
1da177e4 LT |
672 | } |
673 | ||
f0967eea | 674 | module_i2c_driver(lm80_driver); |
1da177e4 LT |
675 | |
676 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and " | |
677 | "Philip Edelbrock <phil@netroedge.com>"); | |
678 | MODULE_DESCRIPTION("LM80 driver"); | |
679 | MODULE_LICENSE("GPL"); |