Commit | Line | Data |
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85f03bcc | 1 | /* |
01d9def5 GR |
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 | */ | |
85f03bcc KL |
19 | |
20 | /* | |
01d9def5 GR |
21 | * Supports following chips: |
22 | * | |
4101ece3 | 23 | * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA |
01d9def5 GR |
24 | * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no |
25 | */ | |
85f03bcc KL |
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> | |
dcd8f392 | 36 | #include <linux/jiffies.h> |
85f03bcc KL |
37 | |
38 | /* Addresses to scan */ | |
25e9c86d | 39 | static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; |
85f03bcc KL |
40 | |
41 | /* Insmod parameters */ | |
85f03bcc | 42 | |
90ab5ee9 | 43 | static bool reset; |
85f03bcc KL |
44 | module_param(reset, bool, 0); |
45 | MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); | |
46 | ||
47 | #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) | |
48 | #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) | |
49 | #define W83L786NG_REG_IN(nr) ((nr) + 0x20) | |
50 | ||
51 | #define W83L786NG_REG_FAN(nr) ((nr) + 0x28) | |
52 | #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) | |
53 | ||
54 | #define W83L786NG_REG_CONFIG 0x40 | |
55 | #define W83L786NG_REG_ALARM1 0x41 | |
ca3ccad8 | 56 | #define W83L786NG_REG_ALARM2 0x42 |
85f03bcc KL |
57 | #define W83L786NG_REG_GPIO_EN 0x47 |
58 | #define W83L786NG_REG_MAN_ID2 0x4C | |
59 | #define W83L786NG_REG_MAN_ID1 0x4D | |
60 | #define W83L786NG_REG_CHIP_ID 0x4E | |
61 | ||
62 | #define W83L786NG_REG_DIODE 0x53 | |
63 | #define W83L786NG_REG_FAN_DIV 0x54 | |
64 | #define W83L786NG_REG_FAN_CFG 0x80 | |
65 | ||
66 | #define W83L786NG_REG_TOLERANCE 0x8D | |
67 | ||
68 | static const u8 W83L786NG_REG_TEMP[2][3] = { | |
69 | { 0x25, /* TEMP 0 in DataSheet */ | |
70 | 0x35, /* TEMP 0 Over in DataSheet */ | |
71 | 0x36 }, /* TEMP 0 Hyst in DataSheet */ | |
72 | { 0x26, /* TEMP 1 in DataSheet */ | |
73 | 0x37, /* TEMP 1 Over in DataSheet */ | |
74 | 0x38 } /* TEMP 1 Hyst in DataSheet */ | |
75 | }; | |
76 | ||
77 | static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; | |
78 | static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; | |
79 | ||
80 | /* FAN Duty Cycle, be used to control */ | |
81 | static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; | |
82 | ||
83 | ||
84 | static inline u8 | |
85 | FAN_TO_REG(long rpm, int div) | |
86 | { | |
87 | if (rpm == 0) | |
88 | return 255; | |
2a844c14 GR |
89 | rpm = clamp_val(rpm, 1, 1000000); |
90 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
85f03bcc KL |
91 | } |
92 | ||
ca3ccad8 | 93 | #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ |
85f03bcc KL |
94 | ((val) == 255 ? 0 : \ |
95 | 1350000 / ((val) * (div)))) | |
96 | ||
97 | /* for temp */ | |
2a844c14 GR |
98 | #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \ |
99 | : (val)) / 1000, 0, 0xff)) | |
ca3ccad8 GR |
100 | #define TEMP_FROM_REG(val) (((val) & 0x80 ? \ |
101 | (val) - 0x100 : (val)) * 1000) | |
85f03bcc | 102 | |
01d9def5 GR |
103 | /* |
104 | * The analog voltage inputs have 8mV LSB. Since the sysfs output is | |
105 | * in mV as would be measured on the chip input pin, need to just | |
106 | * multiply/divide by 8 to translate from/to register values. | |
107 | */ | |
2a844c14 | 108 | #define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255)) |
85f03bcc KL |
109 | #define IN_FROM_REG(val) ((val) * 8) |
110 | ||
111 | #define DIV_FROM_REG(val) (1 << (val)) | |
112 | ||
113 | static inline u8 | |
114 | DIV_TO_REG(long val) | |
115 | { | |
116 | int i; | |
2a844c14 | 117 | val = clamp_val(val, 1, 128) >> 1; |
85f03bcc KL |
118 | for (i = 0; i < 7; i++) { |
119 | if (val == 0) | |
120 | break; | |
121 | val >>= 1; | |
122 | } | |
7fe83ad8 | 123 | return (u8)i; |
85f03bcc KL |
124 | } |
125 | ||
126 | struct w83l786ng_data { | |
85f03bcc KL |
127 | struct device *hwmon_dev; |
128 | struct mutex update_lock; | |
129 | char valid; /* !=0 if following fields are valid */ | |
130 | unsigned long last_updated; /* In jiffies */ | |
131 | unsigned long last_nonvolatile; /* In jiffies, last time we update the | |
01d9def5 | 132 | * nonvolatile registers */ |
85f03bcc KL |
133 | |
134 | u8 in[3]; | |
135 | u8 in_max[3]; | |
136 | u8 in_min[3]; | |
137 | u8 fan[2]; | |
138 | u8 fan_div[2]; | |
139 | u8 fan_min[2]; | |
140 | u8 temp_type[2]; | |
141 | u8 temp[2][3]; | |
142 | u8 pwm[2]; | |
143 | u8 pwm_mode[2]; /* 0->DC variable voltage | |
01d9def5 | 144 | * 1->PWM variable duty cycle */ |
85f03bcc KL |
145 | |
146 | u8 pwm_enable[2]; /* 1->manual | |
01d9def5 | 147 | * 2->thermal cruise (also called SmartFan I) */ |
85f03bcc KL |
148 | u8 tolerance[2]; |
149 | }; | |
150 | ||
33468e76 JD |
151 | static int w83l786ng_probe(struct i2c_client *client, |
152 | const struct i2c_device_id *id); | |
310ec792 | 153 | static int w83l786ng_detect(struct i2c_client *client, |
33468e76 JD |
154 | struct i2c_board_info *info); |
155 | static int w83l786ng_remove(struct i2c_client *client); | |
85f03bcc KL |
156 | static void w83l786ng_init_client(struct i2c_client *client); |
157 | static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); | |
158 | ||
33468e76 | 159 | static const struct i2c_device_id w83l786ng_id[] = { |
1f86df49 | 160 | { "w83l786ng", 0 }, |
33468e76 JD |
161 | { } |
162 | }; | |
163 | MODULE_DEVICE_TABLE(i2c, w83l786ng_id); | |
164 | ||
85f03bcc | 165 | static struct i2c_driver w83l786ng_driver = { |
33468e76 | 166 | .class = I2C_CLASS_HWMON, |
85f03bcc KL |
167 | .driver = { |
168 | .name = "w83l786ng", | |
169 | }, | |
33468e76 JD |
170 | .probe = w83l786ng_probe, |
171 | .remove = w83l786ng_remove, | |
172 | .id_table = w83l786ng_id, | |
173 | .detect = w83l786ng_detect, | |
c3813d6a | 174 | .address_list = normal_i2c, |
85f03bcc KL |
175 | }; |
176 | ||
177 | static u8 | |
178 | w83l786ng_read_value(struct i2c_client *client, u8 reg) | |
179 | { | |
180 | return i2c_smbus_read_byte_data(client, reg); | |
181 | } | |
182 | ||
183 | static int | |
184 | w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) | |
185 | { | |
186 | return i2c_smbus_write_byte_data(client, reg, value); | |
187 | } | |
188 | ||
189 | /* following are the sysfs callback functions */ | |
190 | #define show_in_reg(reg) \ | |
191 | static ssize_t \ | |
192 | show_##reg(struct device *dev, struct device_attribute *attr, \ | |
ca3ccad8 | 193 | char *buf) \ |
85f03bcc KL |
194 | { \ |
195 | int nr = to_sensor_dev_attr(attr)->index; \ | |
196 | struct w83l786ng_data *data = w83l786ng_update_device(dev); \ | |
ca3ccad8 | 197 | return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ |
85f03bcc KL |
198 | } |
199 | ||
200 | show_in_reg(in) | |
201 | show_in_reg(in_min) | |
202 | show_in_reg(in_max) | |
203 | ||
204 | #define store_in_reg(REG, reg) \ | |
205 | static ssize_t \ | |
ca3ccad8 GR |
206 | store_in_##reg(struct device *dev, struct device_attribute *attr, \ |
207 | const char *buf, size_t count) \ | |
85f03bcc KL |
208 | { \ |
209 | int nr = to_sensor_dev_attr(attr)->index; \ | |
210 | struct i2c_client *client = to_i2c_client(dev); \ | |
211 | struct w83l786ng_data *data = i2c_get_clientdata(client); \ | |
ca3ccad8 GR |
212 | unsigned long val; \ |
213 | int err = kstrtoul(buf, 10, &val); \ | |
214 | if (err) \ | |
215 | return err; \ | |
85f03bcc KL |
216 | mutex_lock(&data->update_lock); \ |
217 | data->in_##reg[nr] = IN_TO_REG(val); \ | |
218 | w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ | |
219 | data->in_##reg[nr]); \ | |
220 | mutex_unlock(&data->update_lock); \ | |
221 | return count; \ | |
222 | } | |
223 | ||
224 | store_in_reg(MIN, min) | |
225 | store_in_reg(MAX, max) | |
226 | ||
227 | static struct sensor_device_attribute sda_in_input[] = { | |
228 | SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), | |
229 | SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), | |
230 | SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), | |
231 | }; | |
232 | ||
233 | static struct sensor_device_attribute sda_in_min[] = { | |
234 | SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), | |
235 | SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), | |
236 | SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), | |
237 | }; | |
238 | ||
239 | static struct sensor_device_attribute sda_in_max[] = { | |
240 | SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), | |
241 | SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), | |
242 | SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), | |
243 | }; | |
244 | ||
245 | #define show_fan_reg(reg) \ | |
246 | static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ | |
247 | char *buf) \ | |
248 | { \ | |
249 | int nr = to_sensor_dev_attr(attr)->index; \ | |
250 | struct w83l786ng_data *data = w83l786ng_update_device(dev); \ | |
ca3ccad8 GR |
251 | return sprintf(buf, "%d\n", \ |
252 | FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ | |
85f03bcc KL |
253 | } |
254 | ||
255 | show_fan_reg(fan); | |
256 | show_fan_reg(fan_min); | |
257 | ||
258 | static ssize_t | |
259 | store_fan_min(struct device *dev, struct device_attribute *attr, | |
260 | const char *buf, size_t count) | |
261 | { | |
262 | int nr = to_sensor_dev_attr(attr)->index; | |
263 | struct i2c_client *client = to_i2c_client(dev); | |
264 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
ca3ccad8 GR |
265 | unsigned long val; |
266 | int err; | |
267 | ||
268 | err = kstrtoul(buf, 10, &val); | |
269 | if (err) | |
270 | return err; | |
85f03bcc | 271 | |
85f03bcc KL |
272 | mutex_lock(&data->update_lock); |
273 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); | |
274 | w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), | |
275 | data->fan_min[nr]); | |
276 | mutex_unlock(&data->update_lock); | |
277 | ||
278 | return count; | |
279 | } | |
280 | ||
281 | static ssize_t | |
282 | show_fan_div(struct device *dev, struct device_attribute *attr, | |
283 | char *buf) | |
284 | { | |
285 | int nr = to_sensor_dev_attr(attr)->index; | |
286 | struct w83l786ng_data *data = w83l786ng_update_device(dev); | |
287 | return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); | |
288 | } | |
289 | ||
01d9def5 GR |
290 | /* |
291 | * Note: we save and restore the fan minimum here, because its value is | |
292 | * determined in part by the fan divisor. This follows the principle of | |
293 | * least surprise; the user doesn't expect the fan minimum to change just | |
294 | * because the divisor changed. | |
295 | */ | |
85f03bcc KL |
296 | static ssize_t |
297 | store_fan_div(struct device *dev, struct device_attribute *attr, | |
298 | const char *buf, size_t count) | |
299 | { | |
300 | int nr = to_sensor_dev_attr(attr)->index; | |
301 | struct i2c_client *client = to_i2c_client(dev); | |
302 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
303 | ||
304 | unsigned long min; | |
305 | u8 tmp_fan_div; | |
306 | u8 fan_div_reg; | |
307 | u8 keep_mask = 0; | |
308 | u8 new_shift = 0; | |
309 | ||
ca3ccad8 GR |
310 | unsigned long val; |
311 | int err; | |
312 | ||
313 | err = kstrtoul(buf, 10, &val); | |
314 | if (err) | |
315 | return err; | |
316 | ||
85f03bcc KL |
317 | /* Save fan_min */ |
318 | mutex_lock(&data->update_lock); | |
319 | min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); | |
320 | ||
ca3ccad8 | 321 | data->fan_div[nr] = DIV_TO_REG(val); |
85f03bcc KL |
322 | |
323 | switch (nr) { | |
324 | case 0: | |
325 | keep_mask = 0xf8; | |
326 | new_shift = 0; | |
327 | break; | |
328 | case 1: | |
329 | keep_mask = 0x8f; | |
330 | new_shift = 4; | |
331 | break; | |
332 | } | |
333 | ||
334 | fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) | |
335 | & keep_mask; | |
336 | ||
337 | tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; | |
338 | ||
339 | w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, | |
340 | fan_div_reg | tmp_fan_div); | |
341 | ||
342 | /* Restore fan_min */ | |
343 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
344 | w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), | |
345 | data->fan_min[nr]); | |
346 | mutex_unlock(&data->update_lock); | |
347 | ||
348 | return count; | |
349 | } | |
350 | ||
351 | static struct sensor_device_attribute sda_fan_input[] = { | |
352 | SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), | |
353 | SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), | |
354 | }; | |
355 | ||
356 | static struct sensor_device_attribute sda_fan_min[] = { | |
357 | SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, | |
358 | store_fan_min, 0), | |
359 | SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, | |
360 | store_fan_min, 1), | |
361 | }; | |
362 | ||
363 | static struct sensor_device_attribute sda_fan_div[] = { | |
364 | SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, | |
365 | store_fan_div, 0), | |
366 | SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, | |
367 | store_fan_div, 1), | |
368 | }; | |
369 | ||
370 | ||
371 | /* read/write the temperature, includes measured value and limits */ | |
372 | ||
373 | static ssize_t | |
374 | show_temp(struct device *dev, struct device_attribute *attr, char *buf) | |
375 | { | |
376 | struct sensor_device_attribute_2 *sensor_attr = | |
377 | to_sensor_dev_attr_2(attr); | |
378 | int nr = sensor_attr->nr; | |
379 | int index = sensor_attr->index; | |
380 | struct w83l786ng_data *data = w83l786ng_update_device(dev); | |
381 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); | |
382 | } | |
383 | ||
384 | static ssize_t | |
385 | store_temp(struct device *dev, struct device_attribute *attr, | |
386 | const char *buf, size_t count) | |
387 | { | |
388 | struct sensor_device_attribute_2 *sensor_attr = | |
389 | to_sensor_dev_attr_2(attr); | |
390 | int nr = sensor_attr->nr; | |
391 | int index = sensor_attr->index; | |
392 | struct i2c_client *client = to_i2c_client(dev); | |
393 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
ca3ccad8 GR |
394 | long val; |
395 | int err; | |
396 | ||
397 | err = kstrtol(buf, 10, &val); | |
398 | if (err) | |
399 | return err; | |
85f03bcc | 400 | |
85f03bcc KL |
401 | mutex_lock(&data->update_lock); |
402 | data->temp[nr][index] = TEMP_TO_REG(val); | |
403 | w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], | |
404 | data->temp[nr][index]); | |
405 | mutex_unlock(&data->update_lock); | |
406 | ||
ca3ccad8 | 407 | return count; |
85f03bcc KL |
408 | } |
409 | ||
410 | static struct sensor_device_attribute_2 sda_temp_input[] = { | |
411 | SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), | |
412 | SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), | |
413 | }; | |
414 | ||
415 | static struct sensor_device_attribute_2 sda_temp_max[] = { | |
416 | SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, | |
417 | show_temp, store_temp, 0, 1), | |
418 | SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, | |
419 | show_temp, store_temp, 1, 1), | |
420 | }; | |
421 | ||
422 | static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { | |
423 | SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
424 | show_temp, store_temp, 0, 2), | |
425 | SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, | |
426 | show_temp, store_temp, 1, 2), | |
427 | }; | |
428 | ||
429 | #define show_pwm_reg(reg) \ | |
ca3ccad8 GR |
430 | static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
431 | char *buf) \ | |
85f03bcc KL |
432 | { \ |
433 | struct w83l786ng_data *data = w83l786ng_update_device(dev); \ | |
434 | int nr = to_sensor_dev_attr(attr)->index; \ | |
435 | return sprintf(buf, "%d\n", data->reg[nr]); \ | |
436 | } | |
437 | ||
438 | show_pwm_reg(pwm_mode) | |
439 | show_pwm_reg(pwm_enable) | |
440 | show_pwm_reg(pwm) | |
441 | ||
442 | static ssize_t | |
443 | store_pwm_mode(struct device *dev, struct device_attribute *attr, | |
444 | const char *buf, size_t count) | |
445 | { | |
446 | int nr = to_sensor_dev_attr(attr)->index; | |
447 | struct i2c_client *client = to_i2c_client(dev); | |
448 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
85f03bcc | 449 | u8 reg; |
ca3ccad8 GR |
450 | unsigned long val; |
451 | int err; | |
452 | ||
453 | err = kstrtoul(buf, 10, &val); | |
454 | if (err) | |
455 | return err; | |
85f03bcc KL |
456 | |
457 | if (val > 1) | |
458 | return -EINVAL; | |
459 | mutex_lock(&data->update_lock); | |
460 | data->pwm_mode[nr] = val; | |
461 | reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); | |
462 | reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); | |
463 | if (!val) | |
464 | reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; | |
465 | w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); | |
466 | mutex_unlock(&data->update_lock); | |
467 | return count; | |
468 | } | |
469 | ||
470 | static ssize_t | |
471 | store_pwm(struct device *dev, struct device_attribute *attr, | |
472 | const char *buf, size_t count) | |
473 | { | |
474 | int nr = to_sensor_dev_attr(attr)->index; | |
475 | struct i2c_client *client = to_i2c_client(dev); | |
476 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
ca3ccad8 GR |
477 | unsigned long val; |
478 | int err; | |
479 | ||
480 | err = kstrtoul(buf, 10, &val); | |
481 | if (err) | |
482 | return err; | |
2a844c14 | 483 | val = clamp_val(val, 0, 255); |
85f03bcc KL |
484 | |
485 | mutex_lock(&data->update_lock); | |
486 | data->pwm[nr] = val; | |
487 | w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); | |
488 | mutex_unlock(&data->update_lock); | |
489 | return count; | |
490 | } | |
491 | ||
492 | static ssize_t | |
493 | store_pwm_enable(struct device *dev, struct device_attribute *attr, | |
494 | const char *buf, size_t count) | |
495 | { | |
496 | int nr = to_sensor_dev_attr(attr)->index; | |
497 | struct i2c_client *client = to_i2c_client(dev); | |
498 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
85f03bcc | 499 | u8 reg; |
ca3ccad8 GR |
500 | unsigned long val; |
501 | int err; | |
85f03bcc | 502 | |
ca3ccad8 GR |
503 | err = kstrtoul(buf, 10, &val); |
504 | if (err) | |
505 | return err; | |
506 | ||
507 | if (!val || val > 2) /* only modes 1 and 2 are supported */ | |
85f03bcc KL |
508 | return -EINVAL; |
509 | ||
510 | mutex_lock(&data->update_lock); | |
511 | reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); | |
512 | data->pwm_enable[nr] = val; | |
513 | reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]); | |
514 | reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; | |
515 | w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); | |
516 | mutex_unlock(&data->update_lock); | |
517 | return count; | |
518 | } | |
519 | ||
520 | static struct sensor_device_attribute sda_pwm[] = { | |
521 | SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), | |
522 | SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), | |
523 | }; | |
524 | ||
525 | static struct sensor_device_attribute sda_pwm_mode[] = { | |
526 | SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, | |
527 | store_pwm_mode, 0), | |
528 | SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, | |
529 | store_pwm_mode, 1), | |
530 | }; | |
531 | ||
532 | static struct sensor_device_attribute sda_pwm_enable[] = { | |
533 | SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, | |
534 | store_pwm_enable, 0), | |
535 | SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, | |
536 | store_pwm_enable, 1), | |
537 | }; | |
538 | ||
539 | /* For Smart Fan I/Thermal Cruise and Smart Fan II */ | |
540 | static ssize_t | |
541 | show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) | |
542 | { | |
543 | int nr = to_sensor_dev_attr(attr)->index; | |
544 | struct w83l786ng_data *data = w83l786ng_update_device(dev); | |
545 | return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); | |
546 | } | |
547 | ||
548 | static ssize_t | |
549 | store_tolerance(struct device *dev, struct device_attribute *attr, | |
550 | const char *buf, size_t count) | |
551 | { | |
552 | int nr = to_sensor_dev_attr(attr)->index; | |
553 | struct i2c_client *client = to_i2c_client(dev); | |
554 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
85f03bcc | 555 | u8 tol_tmp, tol_mask; |
ca3ccad8 GR |
556 | unsigned long val; |
557 | int err; | |
85f03bcc | 558 | |
ca3ccad8 GR |
559 | err = kstrtoul(buf, 10, &val); |
560 | if (err) | |
561 | return err; | |
85f03bcc KL |
562 | |
563 | mutex_lock(&data->update_lock); | |
564 | tol_mask = w83l786ng_read_value(client, | |
565 | W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); | |
2a844c14 | 566 | tol_tmp = clamp_val(val, 0, 15); |
85f03bcc KL |
567 | tol_tmp &= 0x0f; |
568 | data->tolerance[nr] = tol_tmp; | |
ca3ccad8 | 569 | if (nr == 1) |
85f03bcc | 570 | tol_tmp <<= 4; |
85f03bcc KL |
571 | |
572 | w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, | |
573 | tol_mask | tol_tmp); | |
574 | mutex_unlock(&data->update_lock); | |
575 | return count; | |
576 | } | |
577 | ||
578 | static struct sensor_device_attribute sda_tolerance[] = { | |
579 | SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, | |
580 | show_tolerance, store_tolerance, 0), | |
581 | SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, | |
582 | show_tolerance, store_tolerance, 1), | |
583 | }; | |
584 | ||
585 | ||
586 | #define IN_UNIT_ATTRS(X) \ | |
587 | &sda_in_input[X].dev_attr.attr, \ | |
588 | &sda_in_min[X].dev_attr.attr, \ | |
589 | &sda_in_max[X].dev_attr.attr | |
590 | ||
591 | #define FAN_UNIT_ATTRS(X) \ | |
592 | &sda_fan_input[X].dev_attr.attr, \ | |
593 | &sda_fan_min[X].dev_attr.attr, \ | |
594 | &sda_fan_div[X].dev_attr.attr | |
595 | ||
596 | #define TEMP_UNIT_ATTRS(X) \ | |
597 | &sda_temp_input[X].dev_attr.attr, \ | |
598 | &sda_temp_max[X].dev_attr.attr, \ | |
599 | &sda_temp_max_hyst[X].dev_attr.attr | |
600 | ||
601 | #define PWM_UNIT_ATTRS(X) \ | |
602 | &sda_pwm[X].dev_attr.attr, \ | |
603 | &sda_pwm_mode[X].dev_attr.attr, \ | |
604 | &sda_pwm_enable[X].dev_attr.attr | |
605 | ||
606 | #define TOLERANCE_UNIT_ATTRS(X) \ | |
607 | &sda_tolerance[X].dev_attr.attr | |
608 | ||
609 | static struct attribute *w83l786ng_attributes[] = { | |
610 | IN_UNIT_ATTRS(0), | |
611 | IN_UNIT_ATTRS(1), | |
612 | IN_UNIT_ATTRS(2), | |
613 | FAN_UNIT_ATTRS(0), | |
614 | FAN_UNIT_ATTRS(1), | |
615 | TEMP_UNIT_ATTRS(0), | |
616 | TEMP_UNIT_ATTRS(1), | |
617 | PWM_UNIT_ATTRS(0), | |
618 | PWM_UNIT_ATTRS(1), | |
619 | TOLERANCE_UNIT_ATTRS(0), | |
620 | TOLERANCE_UNIT_ATTRS(1), | |
621 | NULL | |
622 | }; | |
623 | ||
624 | static const struct attribute_group w83l786ng_group = { | |
625 | .attrs = w83l786ng_attributes, | |
626 | }; | |
627 | ||
628 | static int | |
310ec792 | 629 | w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) |
85f03bcc | 630 | { |
33468e76 | 631 | struct i2c_adapter *adapter = client->adapter; |
52df6440 JD |
632 | u16 man_id; |
633 | u8 chip_id; | |
85f03bcc | 634 | |
ca3ccad8 | 635 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
33468e76 | 636 | return -ENODEV; |
85f03bcc | 637 | |
52df6440 JD |
638 | /* Detection */ |
639 | if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { | |
640 | dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", | |
641 | client->addr); | |
642 | return -ENODEV; | |
85f03bcc KL |
643 | } |
644 | ||
52df6440 JD |
645 | /* Identification */ |
646 | man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + | |
647 | w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); | |
648 | chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); | |
649 | ||
650 | if (man_id != 0x5CA3 || /* Winbond */ | |
651 | chip_id != 0x80) { /* W83L786NG */ | |
652 | dev_dbg(&adapter->dev, | |
653 | "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", | |
654 | man_id, chip_id); | |
655 | return -ENODEV; | |
85f03bcc KL |
656 | } |
657 | ||
33468e76 | 658 | strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); |
85f03bcc | 659 | |
33468e76 JD |
660 | return 0; |
661 | } | |
662 | ||
663 | static int | |
664 | w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
665 | { | |
666 | struct device *dev = &client->dev; | |
667 | struct w83l786ng_data *data; | |
668 | int i, err = 0; | |
669 | u8 reg_tmp; | |
670 | ||
816864d9 GR |
671 | data = devm_kzalloc(&client->dev, sizeof(struct w83l786ng_data), |
672 | GFP_KERNEL); | |
673 | if (!data) | |
674 | return -ENOMEM; | |
33468e76 JD |
675 | |
676 | i2c_set_clientdata(client, data); | |
677 | mutex_init(&data->update_lock); | |
85f03bcc KL |
678 | |
679 | /* Initialize the chip */ | |
680 | w83l786ng_init_client(client); | |
681 | ||
682 | /* A few vars need to be filled upon startup */ | |
683 | for (i = 0; i < 2; i++) { | |
684 | data->fan_min[i] = w83l786ng_read_value(client, | |
685 | W83L786NG_REG_FAN_MIN(i)); | |
686 | } | |
687 | ||
688 | /* Update the fan divisor */ | |
689 | reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); | |
690 | data->fan_div[0] = reg_tmp & 0x07; | |
691 | data->fan_div[1] = (reg_tmp >> 4) & 0x07; | |
692 | ||
693 | /* Register sysfs hooks */ | |
ca3ccad8 GR |
694 | err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group); |
695 | if (err) | |
85f03bcc KL |
696 | goto exit_remove; |
697 | ||
698 | data->hwmon_dev = hwmon_device_register(dev); | |
699 | if (IS_ERR(data->hwmon_dev)) { | |
700 | err = PTR_ERR(data->hwmon_dev); | |
701 | goto exit_remove; | |
702 | } | |
703 | ||
704 | return 0; | |
705 | ||
706 | /* Unregister sysfs hooks */ | |
707 | ||
708 | exit_remove: | |
709 | sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); | |
85f03bcc KL |
710 | return err; |
711 | } | |
712 | ||
713 | static int | |
33468e76 | 714 | w83l786ng_remove(struct i2c_client *client) |
85f03bcc KL |
715 | { |
716 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
85f03bcc KL |
717 | |
718 | hwmon_device_unregister(data->hwmon_dev); | |
719 | sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); | |
720 | ||
85f03bcc KL |
721 | return 0; |
722 | } | |
723 | ||
724 | static void | |
725 | w83l786ng_init_client(struct i2c_client *client) | |
726 | { | |
727 | u8 tmp; | |
728 | ||
729 | if (reset) | |
730 | w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); | |
731 | ||
732 | /* Start monitoring */ | |
733 | tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); | |
734 | if (!(tmp & 0x01)) | |
735 | w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); | |
736 | } | |
737 | ||
738 | static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) | |
739 | { | |
740 | struct i2c_client *client = to_i2c_client(dev); | |
741 | struct w83l786ng_data *data = i2c_get_clientdata(client); | |
742 | int i, j; | |
743 | u8 reg_tmp, pwmcfg; | |
744 | ||
745 | mutex_lock(&data->update_lock); | |
746 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
747 | || !data->valid) { | |
748 | dev_dbg(&client->dev, "Updating w83l786ng data.\n"); | |
749 | ||
750 | /* Update the voltages measured value and limits */ | |
751 | for (i = 0; i < 3; i++) { | |
752 | data->in[i] = w83l786ng_read_value(client, | |
753 | W83L786NG_REG_IN(i)); | |
754 | data->in_min[i] = w83l786ng_read_value(client, | |
755 | W83L786NG_REG_IN_MIN(i)); | |
756 | data->in_max[i] = w83l786ng_read_value(client, | |
757 | W83L786NG_REG_IN_MAX(i)); | |
758 | } | |
759 | ||
760 | /* Update the fan counts and limits */ | |
761 | for (i = 0; i < 2; i++) { | |
762 | data->fan[i] = w83l786ng_read_value(client, | |
763 | W83L786NG_REG_FAN(i)); | |
764 | data->fan_min[i] = w83l786ng_read_value(client, | |
765 | W83L786NG_REG_FAN_MIN(i)); | |
766 | } | |
767 | ||
768 | /* Update the fan divisor */ | |
769 | reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); | |
770 | data->fan_div[0] = reg_tmp & 0x07; | |
771 | data->fan_div[1] = (reg_tmp >> 4) & 0x07; | |
772 | ||
773 | pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); | |
774 | for (i = 0; i < 2; i++) { | |
775 | data->pwm_mode[i] = | |
776 | ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) | |
777 | ? 0 : 1; | |
778 | data->pwm_enable[i] = | |
779 | ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1; | |
780 | data->pwm[i] = w83l786ng_read_value(client, | |
781 | W83L786NG_REG_PWM[i]); | |
782 | } | |
783 | ||
784 | ||
785 | /* Update the temperature sensors */ | |
786 | for (i = 0; i < 2; i++) { | |
787 | for (j = 0; j < 3; j++) { | |
788 | data->temp[i][j] = w83l786ng_read_value(client, | |
789 | W83L786NG_REG_TEMP[i][j]); | |
790 | } | |
791 | } | |
792 | ||
793 | /* Update Smart Fan I/II tolerance */ | |
794 | reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); | |
795 | data->tolerance[0] = reg_tmp & 0x0f; | |
796 | data->tolerance[1] = (reg_tmp >> 4) & 0x0f; | |
797 | ||
798 | data->last_updated = jiffies; | |
799 | data->valid = 1; | |
800 | ||
801 | } | |
802 | ||
803 | mutex_unlock(&data->update_lock); | |
804 | ||
805 | return data; | |
806 | } | |
807 | ||
f0967eea | 808 | module_i2c_driver(w83l786ng_driver); |
85f03bcc KL |
809 | |
810 | MODULE_AUTHOR("Kevin Lo"); | |
811 | MODULE_DESCRIPTION("w83l786ng driver"); | |
812 | MODULE_LICENSE("GPL"); |