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85f03bcc KL |
1 | /* |
2 | w83l786ng.c - Linux kernel driver for hardware monitoring | |
3 | Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation - version 2. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | 02110-1301 USA. | |
18 | */ | |
19 | ||
20 | /* | |
21 | Supports following chips: | |
22 | ||
23 | Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA | |
24 | w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <linux/hwmon.h> | |
32 | #include <linux/hwmon-vid.h> | |
33 | #include <linux/hwmon-sysfs.h> | |
34 | #include <linux/err.h> | |
35 | #include <linux/mutex.h> | |
36 | ||
37 | /* Addresses to scan */ | |
25e9c86d | 38 | static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; |
85f03bcc KL |
39 | |
40 | /* Insmod parameters */ | |
85f03bcc KL |
41 | |
42 | static int reset; | |
43 | module_param(reset, bool, 0); | |
44 | MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); | |
45 | ||
46 | #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) | |
47 | #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) | |
48 | #define W83L786NG_REG_IN(nr) ((nr) + 0x20) | |
49 | ||
50 | #define W83L786NG_REG_FAN(nr) ((nr) + 0x28) | |
51 | #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) | |
52 | ||
53 | #define W83L786NG_REG_CONFIG 0x40 | |
54 | #define W83L786NG_REG_ALARM1 0x41 | |
55 | #define W83L786NG_REG_ALARM2 0x42 | |
56 | #define W83L786NG_REG_GPIO_EN 0x47 | |
57 | #define W83L786NG_REG_MAN_ID2 0x4C | |
58 | #define W83L786NG_REG_MAN_ID1 0x4D | |
59 | #define W83L786NG_REG_CHIP_ID 0x4E | |
60 | ||
61 | #define W83L786NG_REG_DIODE 0x53 | |
62 | #define W83L786NG_REG_FAN_DIV 0x54 | |
63 | #define W83L786NG_REG_FAN_CFG 0x80 | |
64 | ||
65 | #define W83L786NG_REG_TOLERANCE 0x8D | |
66 | ||
67 | static const u8 W83L786NG_REG_TEMP[2][3] = { | |
68 | { 0x25, /* TEMP 0 in DataSheet */ | |
69 | 0x35, /* TEMP 0 Over in DataSheet */ | |
70 | 0x36 }, /* TEMP 0 Hyst in DataSheet */ | |
71 | { 0x26, /* TEMP 1 in DataSheet */ | |
72 | 0x37, /* TEMP 1 Over in DataSheet */ | |
73 | 0x38 } /* TEMP 1 Hyst in DataSheet */ | |
74 | }; | |
75 | ||
76 | static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; | |
77 | static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; | |
78 | ||
79 | /* FAN Duty Cycle, be used to control */ | |
80 | static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; | |
81 | ||
82 | ||
83 | static inline u8 | |
84 | FAN_TO_REG(long rpm, int div) | |
85 | { | |
86 | if (rpm == 0) | |
87 | return 255; | |
88 | rpm = SENSORS_LIMIT(rpm, 1, 1000000); | |
89 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
90 | } | |
91 | ||
92 | #define FAN_FROM_REG(val,div) ((val) == 0 ? -1 : \ | |
93 | ((val) == 255 ? 0 : \ | |
94 | 1350000 / ((val) * (div)))) | |
95 | ||
96 | /* for temp */ | |
97 | #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (val)+0x100*1000 \ | |
98 | : (val)) / 1000, 0, 0xff)) | |
99 | #define TEMP_FROM_REG(val) (((val) & 0x80 ? (val)-0x100 : (val)) * 1000) | |
100 | ||
101 | /* The analog voltage inputs have 8mV LSB. Since the sysfs output is | |
102 | in mV as would be measured on the chip input pin, need to just | |
103 | multiply/divide by 8 to translate from/to register values. */ | |
104 | #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 4) / 8), 0, 255)) | |
105 | #define IN_FROM_REG(val) ((val) * 8) | |
106 | ||
107 | #define DIV_FROM_REG(val) (1 << (val)) | |
108 | ||
109 | static inline u8 | |
110 | DIV_TO_REG(long val) | |
111 | { | |
112 | int i; | |
113 | val = SENSORS_LIMIT(val, 1, 128) >> 1; | |
114 | for (i = 0; i < 7; i++) { | |
115 | if (val == 0) | |
116 | break; | |
117 | val >>= 1; | |
118 | } | |
119 | return ((u8) i); | |
120 | } | |
121 | ||
122 | struct w83l786ng_data { | |
85f03bcc KL |
123 | struct device *hwmon_dev; |
124 | struct mutex update_lock; | |
125 | char valid; /* !=0 if following fields are valid */ | |
126 | unsigned long last_updated; /* In jiffies */ | |
127 | unsigned long last_nonvolatile; /* In jiffies, last time we update the | |
128 | nonvolatile registers */ | |
129 | ||
130 | u8 in[3]; | |
131 | u8 in_max[3]; | |
132 | u8 in_min[3]; | |
133 | u8 fan[2]; | |
134 | u8 fan_div[2]; | |
135 | u8 fan_min[2]; | |
136 | u8 temp_type[2]; | |
137 | u8 temp[2][3]; | |
138 | u8 pwm[2]; | |
139 | u8 pwm_mode[2]; /* 0->DC variable voltage | |
140 | 1->PWM variable duty cycle */ | |
141 | ||
142 | u8 pwm_enable[2]; /* 1->manual | |
143 | 2->thermal cruise (also called SmartFan I) */ | |
144 | u8 tolerance[2]; | |
145 | }; | |
146 | ||
33468e76 JD |
147 | static int w83l786ng_probe(struct i2c_client *client, |
148 | const struct i2c_device_id *id); | |
310ec792 | 149 | static int w83l786ng_detect(struct i2c_client *client, |
33468e76 JD |
150 | struct i2c_board_info *info); |
151 | static int w83l786ng_remove(struct i2c_client *client); | |
85f03bcc KL |
152 | static void w83l786ng_init_client(struct i2c_client *client); |
153 | static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); | |
154 | ||
33468e76 | 155 | static const struct i2c_device_id w83l786ng_id[] = { |
1f86df49 | 156 | { "w83l786ng", 0 }, |
33468e76 JD |
157 | { } |
158 | }; | |
159 | MODULE_DEVICE_TABLE(i2c, w83l786ng_id); | |
160 | ||
85f03bcc | 161 | static struct i2c_driver w83l786ng_driver = { |
33468e76 | 162 | .class = I2C_CLASS_HWMON, |
85f03bcc KL |
163 | .driver = { |
164 | .name = "w83l786ng", | |
165 | }, | |
33468e76 JD |
166 | .probe = w83l786ng_probe, |
167 | .remove = w83l786ng_remove, | |
168 | .id_table = w83l786ng_id, | |
169 | .detect = w83l786ng_detect, | |
c3813d6a | 170 | .address_list = normal_i2c, |
85f03bcc KL |
171 | }; |
172 | ||
173 | static u8 | |
174 | w83l786ng_read_value(struct i2c_client *client, u8 reg) | |
175 | { | |
176 | return i2c_smbus_read_byte_data(client, reg); | |
177 | } | |
178 | ||
179 | static int | |
180 | w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) | |
181 | { | |
182 | return i2c_smbus_write_byte_data(client, reg, value); | |
183 | } | |
184 | ||
185 | /* following are the sysfs callback functions */ | |
186 | #define show_in_reg(reg) \ | |
187 | static ssize_t \ | |
188 | show_##reg(struct device *dev, struct device_attribute *attr, \ | |
189 | char *buf) \ | |
190 | { \ | |
191 | int nr = to_sensor_dev_attr(attr)->index; \ | |
192 | struct w83l786ng_data *data = w83l786ng_update_device(dev); \ | |
193 | return sprintf(buf,"%d\n", IN_FROM_REG(data->reg[nr])); \ | |
194 | } | |
195 | ||
196 | show_in_reg(in) | |
197 | show_in_reg(in_min) | |
198 | show_in_reg(in_max) | |
199 | ||
200 | #define store_in_reg(REG, reg) \ | |
201 | static ssize_t \ | |
202 | store_in_##reg (struct device *dev, struct device_attribute *attr, \ | |
203 | const char *buf, size_t count) \ | |
204 | { \ | |
205 | int nr = to_sensor_dev_attr(attr)->index; \ | |
206 | struct i2c_client *client = to_i2c_client(dev); \ | |
207 | struct w83l786ng_data *data = i2c_get_clientdata(client); \ | |
208 | unsigned long val = simple_strtoul(buf, NULL, 10); \ | |
209 | mutex_lock(&data->update_lock); \ | |
210 | data->in_##reg[nr] = IN_TO_REG(val); \ | |
211 | w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ | |
212 | data->in_##reg[nr]); \ | |
213 | mutex_unlock(&data->update_lock); \ | |
214 | return count; \ | |
215 | } | |
216 | ||
217 | store_in_reg(MIN, min) | |
218 | store_in_reg(MAX, max) | |
219 | ||
220 | static struct sensor_device_attribute sda_in_input[] = { | |
221 | SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), | |
222 | SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), | |
223 | SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), | |
224 | }; | |
225 | ||
226 | static struct sensor_device_attribute sda_in_min[] = { | |
227 | SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), | |
228 | SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), | |
229 | SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), | |
230 | }; | |
231 | ||
232 | static struct sensor_device_attribute sda_in_max[] = { | |
233 | SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), | |
234 | SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), | |
235 | SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), | |
236 | }; | |
237 | ||
238 | #define show_fan_reg(reg) \ | |
239 | static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ | |
240 | char *buf) \ | |
241 | { \ | |
242 | int nr = to_sensor_dev_attr(attr)->index; \ | |
243 | struct w83l786ng_data *data = w83l786ng_update_device(dev); \ | |
244 | return sprintf(buf,"%d\n", \ | |
245 | FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ | |
246 | } | |
247 | ||
248 | show_fan_reg(fan); | |
249 | show_fan_reg(fan_min); | |
250 | ||
251 | static ssize_t | |
252 | store_fan_min(struct device *dev, struct device_attribute *attr, | |
253 | const char *buf, size_t count) | |
254 | { | |
255 | int nr = to_sensor_dev_attr(attr)->index; | |
256 | struct i2c_client *client = to_i2c_client(dev); | |
257 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
258 | u32 val; | |
259 | ||
260 | val = simple_strtoul(buf, NULL, 10); | |
261 | mutex_lock(&data->update_lock); | |
262 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); | |
263 | w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), | |
264 | data->fan_min[nr]); | |
265 | mutex_unlock(&data->update_lock); | |
266 | ||
267 | return count; | |
268 | } | |
269 | ||
270 | static ssize_t | |
271 | show_fan_div(struct device *dev, struct device_attribute *attr, | |
272 | char *buf) | |
273 | { | |
274 | int nr = to_sensor_dev_attr(attr)->index; | |
275 | struct w83l786ng_data *data = w83l786ng_update_device(dev); | |
276 | return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); | |
277 | } | |
278 | ||
279 | /* Note: we save and restore the fan minimum here, because its value is | |
280 | determined in part by the fan divisor. This follows the principle of | |
281 | least surprise; the user doesn't expect the fan minimum to change just | |
282 | because the divisor changed. */ | |
283 | static ssize_t | |
284 | store_fan_div(struct device *dev, struct device_attribute *attr, | |
285 | const char *buf, size_t count) | |
286 | { | |
287 | int nr = to_sensor_dev_attr(attr)->index; | |
288 | struct i2c_client *client = to_i2c_client(dev); | |
289 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
290 | ||
291 | unsigned long min; | |
292 | u8 tmp_fan_div; | |
293 | u8 fan_div_reg; | |
294 | u8 keep_mask = 0; | |
295 | u8 new_shift = 0; | |
296 | ||
297 | /* Save fan_min */ | |
298 | mutex_lock(&data->update_lock); | |
299 | min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); | |
300 | ||
301 | data->fan_div[nr] = DIV_TO_REG(simple_strtoul(buf, NULL, 10)); | |
302 | ||
303 | switch (nr) { | |
304 | case 0: | |
305 | keep_mask = 0xf8; | |
306 | new_shift = 0; | |
307 | break; | |
308 | case 1: | |
309 | keep_mask = 0x8f; | |
310 | new_shift = 4; | |
311 | break; | |
312 | } | |
313 | ||
314 | fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) | |
315 | & keep_mask; | |
316 | ||
317 | tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; | |
318 | ||
319 | w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, | |
320 | fan_div_reg | tmp_fan_div); | |
321 | ||
322 | /* Restore fan_min */ | |
323 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
324 | w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), | |
325 | data->fan_min[nr]); | |
326 | mutex_unlock(&data->update_lock); | |
327 | ||
328 | return count; | |
329 | } | |
330 | ||
331 | static struct sensor_device_attribute sda_fan_input[] = { | |
332 | SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), | |
333 | SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), | |
334 | }; | |
335 | ||
336 | static struct sensor_device_attribute sda_fan_min[] = { | |
337 | SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, | |
338 | store_fan_min, 0), | |
339 | SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, | |
340 | store_fan_min, 1), | |
341 | }; | |
342 | ||
343 | static struct sensor_device_attribute sda_fan_div[] = { | |
344 | SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, | |
345 | store_fan_div, 0), | |
346 | SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, | |
347 | store_fan_div, 1), | |
348 | }; | |
349 | ||
350 | ||
351 | /* read/write the temperature, includes measured value and limits */ | |
352 | ||
353 | static ssize_t | |
354 | show_temp(struct device *dev, struct device_attribute *attr, char *buf) | |
355 | { | |
356 | struct sensor_device_attribute_2 *sensor_attr = | |
357 | to_sensor_dev_attr_2(attr); | |
358 | int nr = sensor_attr->nr; | |
359 | int index = sensor_attr->index; | |
360 | struct w83l786ng_data *data = w83l786ng_update_device(dev); | |
361 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); | |
362 | } | |
363 | ||
364 | static ssize_t | |
365 | store_temp(struct device *dev, struct device_attribute *attr, | |
366 | const char *buf, size_t count) | |
367 | { | |
368 | struct sensor_device_attribute_2 *sensor_attr = | |
369 | to_sensor_dev_attr_2(attr); | |
370 | int nr = sensor_attr->nr; | |
371 | int index = sensor_attr->index; | |
372 | struct i2c_client *client = to_i2c_client(dev); | |
373 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
374 | s32 val; | |
375 | ||
376 | val = simple_strtol(buf, NULL, 10); | |
377 | mutex_lock(&data->update_lock); | |
378 | data->temp[nr][index] = TEMP_TO_REG(val); | |
379 | w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], | |
380 | data->temp[nr][index]); | |
381 | mutex_unlock(&data->update_lock); | |
382 | ||
383 | return count; | |
384 | } | |
385 | ||
386 | static struct sensor_device_attribute_2 sda_temp_input[] = { | |
387 | SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), | |
388 | SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), | |
389 | }; | |
390 | ||
391 | static struct sensor_device_attribute_2 sda_temp_max[] = { | |
392 | SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, | |
393 | show_temp, store_temp, 0, 1), | |
394 | SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, | |
395 | show_temp, store_temp, 1, 1), | |
396 | }; | |
397 | ||
398 | static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { | |
399 | SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
400 | show_temp, store_temp, 0, 2), | |
401 | SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, | |
402 | show_temp, store_temp, 1, 2), | |
403 | }; | |
404 | ||
405 | #define show_pwm_reg(reg) \ | |
406 | static ssize_t show_##reg (struct device *dev, struct device_attribute *attr, \ | |
407 | char *buf) \ | |
408 | { \ | |
409 | struct w83l786ng_data *data = w83l786ng_update_device(dev); \ | |
410 | int nr = to_sensor_dev_attr(attr)->index; \ | |
411 | return sprintf(buf, "%d\n", data->reg[nr]); \ | |
412 | } | |
413 | ||
414 | show_pwm_reg(pwm_mode) | |
415 | show_pwm_reg(pwm_enable) | |
416 | show_pwm_reg(pwm) | |
417 | ||
418 | static ssize_t | |
419 | store_pwm_mode(struct device *dev, struct device_attribute *attr, | |
420 | const char *buf, size_t count) | |
421 | { | |
422 | int nr = to_sensor_dev_attr(attr)->index; | |
423 | struct i2c_client *client = to_i2c_client(dev); | |
424 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
425 | u32 val = simple_strtoul(buf, NULL, 10); | |
426 | u8 reg; | |
427 | ||
428 | if (val > 1) | |
429 | return -EINVAL; | |
430 | mutex_lock(&data->update_lock); | |
431 | data->pwm_mode[nr] = val; | |
432 | reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); | |
433 | reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); | |
434 | if (!val) | |
435 | reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; | |
436 | w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); | |
437 | mutex_unlock(&data->update_lock); | |
438 | return count; | |
439 | } | |
440 | ||
441 | static ssize_t | |
442 | store_pwm(struct device *dev, struct device_attribute *attr, | |
443 | const char *buf, size_t count) | |
444 | { | |
445 | int nr = to_sensor_dev_attr(attr)->index; | |
446 | struct i2c_client *client = to_i2c_client(dev); | |
447 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
448 | u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 255); | |
449 | ||
450 | mutex_lock(&data->update_lock); | |
451 | data->pwm[nr] = val; | |
452 | w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); | |
453 | mutex_unlock(&data->update_lock); | |
454 | return count; | |
455 | } | |
456 | ||
457 | static ssize_t | |
458 | store_pwm_enable(struct device *dev, struct device_attribute *attr, | |
459 | const char *buf, size_t count) | |
460 | { | |
461 | int nr = to_sensor_dev_attr(attr)->index; | |
462 | struct i2c_client *client = to_i2c_client(dev); | |
463 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
464 | u32 val = simple_strtoul(buf, NULL, 10); | |
465 | ||
466 | u8 reg; | |
467 | ||
468 | if (!val || (val > 2)) /* only modes 1 and 2 are supported */ | |
469 | return -EINVAL; | |
470 | ||
471 | mutex_lock(&data->update_lock); | |
472 | reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); | |
473 | data->pwm_enable[nr] = val; | |
474 | reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]); | |
475 | reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; | |
476 | w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); | |
477 | mutex_unlock(&data->update_lock); | |
478 | return count; | |
479 | } | |
480 | ||
481 | static struct sensor_device_attribute sda_pwm[] = { | |
482 | SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), | |
483 | SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), | |
484 | }; | |
485 | ||
486 | static struct sensor_device_attribute sda_pwm_mode[] = { | |
487 | SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, | |
488 | store_pwm_mode, 0), | |
489 | SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, | |
490 | store_pwm_mode, 1), | |
491 | }; | |
492 | ||
493 | static struct sensor_device_attribute sda_pwm_enable[] = { | |
494 | SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, | |
495 | store_pwm_enable, 0), | |
496 | SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, | |
497 | store_pwm_enable, 1), | |
498 | }; | |
499 | ||
500 | /* For Smart Fan I/Thermal Cruise and Smart Fan II */ | |
501 | static ssize_t | |
502 | show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) | |
503 | { | |
504 | int nr = to_sensor_dev_attr(attr)->index; | |
505 | struct w83l786ng_data *data = w83l786ng_update_device(dev); | |
506 | return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); | |
507 | } | |
508 | ||
509 | static ssize_t | |
510 | store_tolerance(struct device *dev, struct device_attribute *attr, | |
511 | const char *buf, size_t count) | |
512 | { | |
513 | int nr = to_sensor_dev_attr(attr)->index; | |
514 | struct i2c_client *client = to_i2c_client(dev); | |
515 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
516 | u32 val; | |
517 | u8 tol_tmp, tol_mask; | |
518 | ||
519 | val = simple_strtoul(buf, NULL, 10); | |
520 | ||
521 | mutex_lock(&data->update_lock); | |
522 | tol_mask = w83l786ng_read_value(client, | |
523 | W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); | |
524 | tol_tmp = SENSORS_LIMIT(val, 0, 15); | |
525 | tol_tmp &= 0x0f; | |
526 | data->tolerance[nr] = tol_tmp; | |
527 | if (nr == 1) { | |
528 | tol_tmp <<= 4; | |
529 | } | |
530 | ||
531 | w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, | |
532 | tol_mask | tol_tmp); | |
533 | mutex_unlock(&data->update_lock); | |
534 | return count; | |
535 | } | |
536 | ||
537 | static struct sensor_device_attribute sda_tolerance[] = { | |
538 | SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, | |
539 | show_tolerance, store_tolerance, 0), | |
540 | SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, | |
541 | show_tolerance, store_tolerance, 1), | |
542 | }; | |
543 | ||
544 | ||
545 | #define IN_UNIT_ATTRS(X) \ | |
546 | &sda_in_input[X].dev_attr.attr, \ | |
547 | &sda_in_min[X].dev_attr.attr, \ | |
548 | &sda_in_max[X].dev_attr.attr | |
549 | ||
550 | #define FAN_UNIT_ATTRS(X) \ | |
551 | &sda_fan_input[X].dev_attr.attr, \ | |
552 | &sda_fan_min[X].dev_attr.attr, \ | |
553 | &sda_fan_div[X].dev_attr.attr | |
554 | ||
555 | #define TEMP_UNIT_ATTRS(X) \ | |
556 | &sda_temp_input[X].dev_attr.attr, \ | |
557 | &sda_temp_max[X].dev_attr.attr, \ | |
558 | &sda_temp_max_hyst[X].dev_attr.attr | |
559 | ||
560 | #define PWM_UNIT_ATTRS(X) \ | |
561 | &sda_pwm[X].dev_attr.attr, \ | |
562 | &sda_pwm_mode[X].dev_attr.attr, \ | |
563 | &sda_pwm_enable[X].dev_attr.attr | |
564 | ||
565 | #define TOLERANCE_UNIT_ATTRS(X) \ | |
566 | &sda_tolerance[X].dev_attr.attr | |
567 | ||
568 | static struct attribute *w83l786ng_attributes[] = { | |
569 | IN_UNIT_ATTRS(0), | |
570 | IN_UNIT_ATTRS(1), | |
571 | IN_UNIT_ATTRS(2), | |
572 | FAN_UNIT_ATTRS(0), | |
573 | FAN_UNIT_ATTRS(1), | |
574 | TEMP_UNIT_ATTRS(0), | |
575 | TEMP_UNIT_ATTRS(1), | |
576 | PWM_UNIT_ATTRS(0), | |
577 | PWM_UNIT_ATTRS(1), | |
578 | TOLERANCE_UNIT_ATTRS(0), | |
579 | TOLERANCE_UNIT_ATTRS(1), | |
580 | NULL | |
581 | }; | |
582 | ||
583 | static const struct attribute_group w83l786ng_group = { | |
584 | .attrs = w83l786ng_attributes, | |
585 | }; | |
586 | ||
587 | static int | |
310ec792 | 588 | w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) |
85f03bcc | 589 | { |
33468e76 | 590 | struct i2c_adapter *adapter = client->adapter; |
52df6440 JD |
591 | u16 man_id; |
592 | u8 chip_id; | |
85f03bcc KL |
593 | |
594 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
33468e76 | 595 | return -ENODEV; |
85f03bcc KL |
596 | } |
597 | ||
52df6440 JD |
598 | /* Detection */ |
599 | if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { | |
600 | dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", | |
601 | client->addr); | |
602 | return -ENODEV; | |
85f03bcc KL |
603 | } |
604 | ||
52df6440 JD |
605 | /* Identification */ |
606 | man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + | |
607 | w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); | |
608 | chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); | |
609 | ||
610 | if (man_id != 0x5CA3 || /* Winbond */ | |
611 | chip_id != 0x80) { /* W83L786NG */ | |
612 | dev_dbg(&adapter->dev, | |
613 | "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", | |
614 | man_id, chip_id); | |
615 | return -ENODEV; | |
85f03bcc KL |
616 | } |
617 | ||
33468e76 | 618 | strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); |
85f03bcc | 619 | |
33468e76 JD |
620 | return 0; |
621 | } | |
622 | ||
623 | static int | |
624 | w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
625 | { | |
626 | struct device *dev = &client->dev; | |
627 | struct w83l786ng_data *data; | |
628 | int i, err = 0; | |
629 | u8 reg_tmp; | |
630 | ||
631 | data = kzalloc(sizeof(struct w83l786ng_data), GFP_KERNEL); | |
632 | if (!data) { | |
633 | err = -ENOMEM; | |
634 | goto exit; | |
635 | } | |
636 | ||
637 | i2c_set_clientdata(client, data); | |
638 | mutex_init(&data->update_lock); | |
85f03bcc KL |
639 | |
640 | /* Initialize the chip */ | |
641 | w83l786ng_init_client(client); | |
642 | ||
643 | /* A few vars need to be filled upon startup */ | |
644 | for (i = 0; i < 2; i++) { | |
645 | data->fan_min[i] = w83l786ng_read_value(client, | |
646 | W83L786NG_REG_FAN_MIN(i)); | |
647 | } | |
648 | ||
649 | /* Update the fan divisor */ | |
650 | reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); | |
651 | data->fan_div[0] = reg_tmp & 0x07; | |
652 | data->fan_div[1] = (reg_tmp >> 4) & 0x07; | |
653 | ||
654 | /* Register sysfs hooks */ | |
655 | if ((err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group))) | |
656 | goto exit_remove; | |
657 | ||
658 | data->hwmon_dev = hwmon_device_register(dev); | |
659 | if (IS_ERR(data->hwmon_dev)) { | |
660 | err = PTR_ERR(data->hwmon_dev); | |
661 | goto exit_remove; | |
662 | } | |
663 | ||
664 | return 0; | |
665 | ||
666 | /* Unregister sysfs hooks */ | |
667 | ||
668 | exit_remove: | |
669 | sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); | |
85f03bcc KL |
670 | kfree(data); |
671 | exit: | |
672 | return err; | |
673 | } | |
674 | ||
675 | static int | |
33468e76 | 676 | w83l786ng_remove(struct i2c_client *client) |
85f03bcc KL |
677 | { |
678 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
85f03bcc KL |
679 | |
680 | hwmon_device_unregister(data->hwmon_dev); | |
681 | sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); | |
682 | ||
85f03bcc KL |
683 | kfree(data); |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | static void | |
689 | w83l786ng_init_client(struct i2c_client *client) | |
690 | { | |
691 | u8 tmp; | |
692 | ||
693 | if (reset) | |
694 | w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); | |
695 | ||
696 | /* Start monitoring */ | |
697 | tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); | |
698 | if (!(tmp & 0x01)) | |
699 | w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); | |
700 | } | |
701 | ||
702 | static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) | |
703 | { | |
704 | struct i2c_client *client = to_i2c_client(dev); | |
705 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
706 | int i, j; | |
707 | u8 reg_tmp, pwmcfg; | |
708 | ||
709 | mutex_lock(&data->update_lock); | |
710 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
711 | || !data->valid) { | |
712 | dev_dbg(&client->dev, "Updating w83l786ng data.\n"); | |
713 | ||
714 | /* Update the voltages measured value and limits */ | |
715 | for (i = 0; i < 3; i++) { | |
716 | data->in[i] = w83l786ng_read_value(client, | |
717 | W83L786NG_REG_IN(i)); | |
718 | data->in_min[i] = w83l786ng_read_value(client, | |
719 | W83L786NG_REG_IN_MIN(i)); | |
720 | data->in_max[i] = w83l786ng_read_value(client, | |
721 | W83L786NG_REG_IN_MAX(i)); | |
722 | } | |
723 | ||
724 | /* Update the fan counts and limits */ | |
725 | for (i = 0; i < 2; i++) { | |
726 | data->fan[i] = w83l786ng_read_value(client, | |
727 | W83L786NG_REG_FAN(i)); | |
728 | data->fan_min[i] = w83l786ng_read_value(client, | |
729 | W83L786NG_REG_FAN_MIN(i)); | |
730 | } | |
731 | ||
732 | /* Update the fan divisor */ | |
733 | reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); | |
734 | data->fan_div[0] = reg_tmp & 0x07; | |
735 | data->fan_div[1] = (reg_tmp >> 4) & 0x07; | |
736 | ||
737 | pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); | |
738 | for (i = 0; i < 2; i++) { | |
739 | data->pwm_mode[i] = | |
740 | ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) | |
741 | ? 0 : 1; | |
742 | data->pwm_enable[i] = | |
743 | ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1; | |
744 | data->pwm[i] = w83l786ng_read_value(client, | |
745 | W83L786NG_REG_PWM[i]); | |
746 | } | |
747 | ||
748 | ||
749 | /* Update the temperature sensors */ | |
750 | for (i = 0; i < 2; i++) { | |
751 | for (j = 0; j < 3; j++) { | |
752 | data->temp[i][j] = w83l786ng_read_value(client, | |
753 | W83L786NG_REG_TEMP[i][j]); | |
754 | } | |
755 | } | |
756 | ||
757 | /* Update Smart Fan I/II tolerance */ | |
758 | reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); | |
759 | data->tolerance[0] = reg_tmp & 0x0f; | |
760 | data->tolerance[1] = (reg_tmp >> 4) & 0x0f; | |
761 | ||
762 | data->last_updated = jiffies; | |
763 | data->valid = 1; | |
764 | ||
765 | } | |
766 | ||
767 | mutex_unlock(&data->update_lock); | |
768 | ||
769 | return data; | |
770 | } | |
771 | ||
772 | static int __init | |
773 | sensors_w83l786ng_init(void) | |
774 | { | |
775 | return i2c_add_driver(&w83l786ng_driver); | |
776 | } | |
777 | ||
778 | static void __exit | |
779 | sensors_w83l786ng_exit(void) | |
780 | { | |
781 | i2c_del_driver(&w83l786ng_driver); | |
782 | } | |
783 | ||
784 | MODULE_AUTHOR("Kevin Lo"); | |
785 | MODULE_DESCRIPTION("w83l786ng driver"); | |
786 | MODULE_LICENSE("GPL"); | |
787 | ||
788 | module_init(sensors_w83l786ng_init); | |
789 | module_exit(sensors_w83l786ng_exit); |