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1 | /* |
2 | * asb100.c - Part of lm_sensors, Linux kernel modules for hardware |
3 | * monitoring |
4 | * |
5 | * Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com> |
6 | * |
7 | * (derived from w83781d.c) |
8 | * |
9 | * Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>, |
10 | * Philip Edelbrock <phil@netroedge.com>, and |
11 | * Mark Studebaker <mdsxyz123@yahoo.com> |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License as published by |
15 | * the Free Software Foundation; either version 2 of the License, or |
16 | * (at your option) any later version. |
17 | * |
18 | * This program is distributed in the hope that it will be useful, |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
21 | * GNU General Public License for more details. |
22 | * |
23 | * You should have received a copy of the GNU General Public License |
24 | * along with this program; if not, write to the Free Software |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
26 | */ |
27 | |
28 | /* |
29 | * This driver supports the hardware sensor chips: Asus ASB100 and |
30 | * ASB100-A "BACH". |
31 | * |
32 | * ASB100-A supports pwm1, while plain ASB100 does not. There is no known |
33 | * way for the driver to tell which one is there. |
34 | * |
35 | * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA |
36 | * asb100 7 3 1 4 0x31 0x0694 yes no |
37 | */ |
38 | |
39 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
40 | |
41 | #include <linux/module.h> |
42 | #include <linux/slab.h> |
43 | #include <linux/i2c.h> |
44 | #include <linux/hwmon.h> |
45 | #include <linux/hwmon-sysfs.h> |
46 | #include <linux/hwmon-vid.h> |
47 | #include <linux/err.h> |
48 | #include <linux/init.h> |
49 | #include <linux/jiffies.h> |
50 | #include <linux/mutex.h> |
51 | #include "lm75.h" |
52 | |
53 | /* I2C addresses to scan */ |
54 | static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END }; |
55 | |
56 | static unsigned short force_subclients[4]; |
57 | module_param_array(force_subclients, short, NULL, 0); |
58 | MODULE_PARM_DESC(force_subclients, "List of subclient addresses: " |
59 | "{bus, clientaddr, subclientaddr1, subclientaddr2}"); |
60 | |
61 | /* Voltage IN registers 0-6 */ |
62 | #define ASB100_REG_IN(nr) (0x20 + (nr)) |
63 | #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2)) |
64 | #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2)) |
65 | |
66 | /* FAN IN registers 1-3 */ |
67 | #define ASB100_REG_FAN(nr) (0x28 + (nr)) |
68 | #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr)) |
69 | |
70 | /* TEMPERATURE registers 1-4 */ |
71 | static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17}; |
72 | static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18}; |
73 | static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19}; |
74 | |
75 | #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr]) |
76 | #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr]) |
77 | #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr]) |
78 | |
79 | #define ASB100_REG_TEMP2_CONFIG 0x0152 |
80 | #define ASB100_REG_TEMP3_CONFIG 0x0252 |
81 | |
82 | |
83 | #define ASB100_REG_CONFIG 0x40 |
84 | #define ASB100_REG_ALARM1 0x41 |
85 | #define ASB100_REG_ALARM2 0x42 |
86 | #define ASB100_REG_SMIM1 0x43 |
87 | #define ASB100_REG_SMIM2 0x44 |
88 | #define ASB100_REG_VID_FANDIV 0x47 |
89 | #define ASB100_REG_I2C_ADDR 0x48 |
90 | #define ASB100_REG_CHIPID 0x49 |
91 | #define ASB100_REG_I2C_SUBADDR 0x4a |
92 | #define ASB100_REG_PIN 0x4b |
93 | #define ASB100_REG_IRQ 0x4c |
94 | #define ASB100_REG_BANK 0x4e |
95 | #define ASB100_REG_CHIPMAN 0x4f |
96 | |
97 | #define ASB100_REG_WCHIPID 0x58 |
98 | |
99 | /* bit 7 -> enable, bits 0-3 -> duty cycle */ |
100 | #define ASB100_REG_PWM1 0x59 |
101 | |
102 | /* |
103 | * CONVERSIONS |
104 | * Rounding and limit checking is only done on the TO_REG variants. |
105 | */ |
106 | |
107 | /* These constants are a guess, consistent w/ w83781d */ |
108 | #define ASB100_IN_MIN 0 |
109 | #define ASB100_IN_MAX 4080 |
110 | |
111 | /* |
112 | * IN: 1/1000 V (0V to 4.08V) |
113 | * REG: 16mV/bit |
114 | */ |
115 | static u8 IN_TO_REG(unsigned val) |
116 | { |
117 | unsigned nval = clamp_val(val, ASB100_IN_MIN, ASB100_IN_MAX); |
118 | return (nval + 8) / 16; |
119 | } |
120 | |
121 | static unsigned IN_FROM_REG(u8 reg) |
122 | { |
123 | return reg * 16; |
124 | } |
125 | |
126 | static u8 FAN_TO_REG(long rpm, int div) |
127 | { |
128 | if (rpm == -1) |
129 | return 0; |
130 | if (rpm == 0) |
131 | return 255; |
132 | rpm = clamp_val(rpm, 1, 1000000); |
133 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
134 | } |
135 | |
136 | static int FAN_FROM_REG(u8 val, int div) |
137 | { |
138 | return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); |
139 | } |
140 | |
141 | /* These constants are a guess, consistent w/ w83781d */ |
142 | #define ASB100_TEMP_MIN -128000 |
143 | #define ASB100_TEMP_MAX 127000 |
144 | |
145 | /* |
146 | * TEMP: 0.001C/bit (-128C to +127C) |
147 | * REG: 1C/bit, two's complement |
148 | */ |
149 | static u8 TEMP_TO_REG(long temp) |
150 | { |
151 | int ntemp = clamp_val(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX); |
152 | ntemp += (ntemp < 0 ? -500 : 500); |
153 | return (u8)(ntemp / 1000); |
154 | } |
155 | |
156 | static int TEMP_FROM_REG(u8 reg) |
157 | { |
158 | return (s8)reg * 1000; |
159 | } |
160 | |
161 | /* |
162 | * PWM: 0 - 255 per sensors documentation |
163 | * REG: (6.25% duty cycle per bit) |
164 | */ |
165 | static u8 ASB100_PWM_TO_REG(int pwm) |
166 | { |
167 | pwm = clamp_val(pwm, 0, 255); |
168 | return (u8)(pwm / 16); |
169 | } |
170 | |
171 | static int ASB100_PWM_FROM_REG(u8 reg) |
172 | { |
173 | return reg * 16; |
174 | } |
175 | |
176 | #define DIV_FROM_REG(val) (1 << (val)) |
177 | |
178 | /* |
179 | * FAN DIV: 1, 2, 4, or 8 (defaults to 2) |
180 | * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) |
181 | */ |
182 | static u8 DIV_TO_REG(long val) |
183 | { |
184 | return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; |
185 | } |
186 | |
187 | /* |
188 | * For each registered client, we need to keep some data in memory. That |
189 | * data is pointed to by client->data. The structure itself is |
190 | * dynamically allocated, at the same time the client itself is allocated. |
191 | */ |
192 | struct asb100_data { |
193 | struct device *hwmon_dev; |
194 | struct mutex lock; |
195 | |
196 | struct mutex update_lock; |
197 | unsigned long last_updated; /* In jiffies */ |
198 | |
199 | /* array of 2 pointers to subclients */ |
200 | struct i2c_client *lm75[2]; |
201 | |
202 | char valid; /* !=0 if following fields are valid */ |
203 | u8 in[7]; /* Register value */ |
204 | u8 in_max[7]; /* Register value */ |
205 | u8 in_min[7]; /* Register value */ |
206 | u8 fan[3]; /* Register value */ |
207 | u8 fan_min[3]; /* Register value */ |
208 | u16 temp[4]; /* Register value (0 and 3 are u8 only) */ |
209 | u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */ |
210 | u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */ |
211 | u8 fan_div[3]; /* Register encoding, right justified */ |
212 | u8 pwm; /* Register encoding */ |
213 | u8 vid; /* Register encoding, combined */ |
214 | u32 alarms; /* Register encoding, combined */ |
215 | u8 vrm; |
216 | }; |
217 | |
218 | static int asb100_read_value(struct i2c_client *client, u16 reg); |
219 | static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val); |
220 | |
221 | static int asb100_probe(struct i2c_client *client, |
222 | const struct i2c_device_id *id); |
223 | static int asb100_detect(struct i2c_client *client, |
224 | struct i2c_board_info *info); |
225 | static int asb100_remove(struct i2c_client *client); |
226 | static struct asb100_data *asb100_update_device(struct device *dev); |
227 | static void asb100_init_client(struct i2c_client *client); |
228 | |
229 | static const struct i2c_device_id asb100_id[] = { |
230 | { "asb100", 0 }, |
231 | { } |
232 | }; |
233 | MODULE_DEVICE_TABLE(i2c, asb100_id); |
234 | |
235 | static struct i2c_driver asb100_driver = { |
236 | .class = I2C_CLASS_HWMON, |
237 | .driver = { |
238 | .name = "asb100", |
239 | }, |
240 | .probe = asb100_probe, |
241 | .remove = asb100_remove, |
242 | .id_table = asb100_id, |
243 | .detect = asb100_detect, |
244 | .address_list = normal_i2c, |
245 | }; |
246 | |
247 | /* 7 Voltages */ |
248 | #define show_in_reg(reg) \ |
249 | static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
250 | char *buf) \ |
251 | { \ |
252 | int nr = to_sensor_dev_attr(attr)->index; \ |
253 | struct asb100_data *data = asb100_update_device(dev); \ |
254 | return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ |
255 | } |
256 | |
257 | show_in_reg(in) |
258 | show_in_reg(in_min) |
259 | show_in_reg(in_max) |
260 | |
261 | #define set_in_reg(REG, reg) \ |
262 | static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \ |
263 | const char *buf, size_t count) \ |
264 | { \ |
265 | int nr = to_sensor_dev_attr(attr)->index; \ |
266 | struct i2c_client *client = to_i2c_client(dev); \ |
267 | struct asb100_data *data = i2c_get_clientdata(client); \ |
268 | unsigned long val; \ |
269 | int err = kstrtoul(buf, 10, &val); \ |
270 | if (err) \ |
271 | return err; \ |
272 | mutex_lock(&data->update_lock); \ |
273 | data->in_##reg[nr] = IN_TO_REG(val); \ |
274 | asb100_write_value(client, ASB100_REG_IN_##REG(nr), \ |
275 | data->in_##reg[nr]); \ |
276 | mutex_unlock(&data->update_lock); \ |
277 | return count; \ |
278 | } |
279 | |
280 | set_in_reg(MIN, min) |
281 | set_in_reg(MAX, max) |
282 | |
283 | #define sysfs_in(offset) \ |
284 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
285 | show_in, NULL, offset); \ |
286 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
287 | show_in_min, set_in_min, offset); \ |
288 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ |
289 | show_in_max, set_in_max, offset) |
290 | |
291 | sysfs_in(0); |
292 | sysfs_in(1); |
293 | sysfs_in(2); |
294 | sysfs_in(3); |
295 | sysfs_in(4); |
296 | sysfs_in(5); |
297 | sysfs_in(6); |
298 | |
299 | /* 3 Fans */ |
300 | static ssize_t show_fan(struct device *dev, struct device_attribute *attr, |
301 | char *buf) |
302 | { |
303 | int nr = to_sensor_dev_attr(attr)->index; |
304 | struct asb100_data *data = asb100_update_device(dev); |
305 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
306 | DIV_FROM_REG(data->fan_div[nr]))); |
307 | } |
308 | |
309 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, |
310 | char *buf) |
311 | { |
312 | int nr = to_sensor_dev_attr(attr)->index; |
313 | struct asb100_data *data = asb100_update_device(dev); |
314 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
315 | DIV_FROM_REG(data->fan_div[nr]))); |
316 | } |
317 | |
318 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, |
319 | char *buf) |
320 | { |
321 | int nr = to_sensor_dev_attr(attr)->index; |
322 | struct asb100_data *data = asb100_update_device(dev); |
323 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); |
324 | } |
325 | |
326 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, |
327 | const char *buf, size_t count) |
328 | { |
329 | int nr = to_sensor_dev_attr(attr)->index; |
330 | struct i2c_client *client = to_i2c_client(dev); |
331 | struct asb100_data *data = i2c_get_clientdata(client); |
332 | unsigned long val; |
333 | int err; |
334 | |
335 | err = kstrtoul(buf, 10, &val); |
336 | if (err) |
337 | return err; |
338 | |
339 | mutex_lock(&data->update_lock); |
340 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
341 | asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); |
342 | mutex_unlock(&data->update_lock); |
343 | return count; |
344 | } |
345 | |
346 | /* |
347 | * Note: we save and restore the fan minimum here, because its value is |
348 | * determined in part by the fan divisor. This follows the principle of |
349 | * least surprise; the user doesn't expect the fan minimum to change just |
350 | * because the divisor changed. |
351 | */ |
352 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, |
353 | const char *buf, size_t count) |
354 | { |
355 | int nr = to_sensor_dev_attr(attr)->index; |
356 | struct i2c_client *client = to_i2c_client(dev); |
357 | struct asb100_data *data = i2c_get_clientdata(client); |
358 | unsigned long min; |
359 | int reg; |
360 | unsigned long val; |
361 | int err; |
362 | |
363 | err = kstrtoul(buf, 10, &val); |
364 | if (err) |
365 | return err; |
366 | |
367 | mutex_lock(&data->update_lock); |
368 | |
369 | min = FAN_FROM_REG(data->fan_min[nr], |
370 | DIV_FROM_REG(data->fan_div[nr])); |
371 | data->fan_div[nr] = DIV_TO_REG(val); |
372 | |
373 | switch (nr) { |
374 | case 0: /* fan 1 */ |
375 | reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); |
376 | reg = (reg & 0xcf) | (data->fan_div[0] << 4); |
377 | asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); |
378 | break; |
379 | |
380 | case 1: /* fan 2 */ |
381 | reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); |
382 | reg = (reg & 0x3f) | (data->fan_div[1] << 6); |
383 | asb100_write_value(client, ASB100_REG_VID_FANDIV, reg); |
384 | break; |
385 | |
386 | case 2: /* fan 3 */ |
387 | reg = asb100_read_value(client, ASB100_REG_PIN); |
388 | reg = (reg & 0x3f) | (data->fan_div[2] << 6); |
389 | asb100_write_value(client, ASB100_REG_PIN, reg); |
390 | break; |
391 | } |
392 | |
393 | data->fan_min[nr] = |
394 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); |
395 | asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]); |
396 | |
397 | mutex_unlock(&data->update_lock); |
398 | |
399 | return count; |
400 | } |
401 | |
402 | #define sysfs_fan(offset) \ |
403 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ |
404 | show_fan, NULL, offset - 1); \ |
405 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
406 | show_fan_min, set_fan_min, offset - 1); \ |
407 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ |
408 | show_fan_div, set_fan_div, offset - 1) |
409 | |
410 | sysfs_fan(1); |
411 | sysfs_fan(2); |
412 | sysfs_fan(3); |
413 | |
414 | /* 4 Temp. Sensors */ |
415 | static int sprintf_temp_from_reg(u16 reg, char *buf, int nr) |
416 | { |
417 | int ret = 0; |
418 | |
419 | switch (nr) { |
420 | case 1: case 2: |
421 | ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg)); |
422 | break; |
423 | case 0: case 3: default: |
424 | ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg)); |
425 | break; |
426 | } |
427 | return ret; |
428 | } |
429 | |
430 | #define show_temp_reg(reg) \ |
431 | static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
432 | char *buf) \ |
433 | { \ |
434 | int nr = to_sensor_dev_attr(attr)->index; \ |
435 | struct asb100_data *data = asb100_update_device(dev); \ |
436 | return sprintf_temp_from_reg(data->reg[nr], buf, nr); \ |
437 | } |
438 | |
439 | show_temp_reg(temp); |
440 | show_temp_reg(temp_max); |
441 | show_temp_reg(temp_hyst); |
442 | |
443 | #define set_temp_reg(REG, reg) \ |
444 | static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \ |
445 | const char *buf, size_t count) \ |
446 | { \ |
447 | int nr = to_sensor_dev_attr(attr)->index; \ |
448 | struct i2c_client *client = to_i2c_client(dev); \ |
449 | struct asb100_data *data = i2c_get_clientdata(client); \ |
450 | long val; \ |
451 | int err = kstrtol(buf, 10, &val); \ |
452 | if (err) \ |
453 | return err; \ |
454 | mutex_lock(&data->update_lock); \ |
455 | switch (nr) { \ |
456 | case 1: case 2: \ |
457 | data->reg[nr] = LM75_TEMP_TO_REG(val); \ |
458 | break; \ |
459 | case 0: case 3: default: \ |
460 | data->reg[nr] = TEMP_TO_REG(val); \ |
461 | break; \ |
462 | } \ |
463 | asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \ |
464 | data->reg[nr]); \ |
465 | mutex_unlock(&data->update_lock); \ |
466 | return count; \ |
467 | } |
468 | |
469 | set_temp_reg(MAX, temp_max); |
470 | set_temp_reg(HYST, temp_hyst); |
471 | |
472 | #define sysfs_temp(num) \ |
473 | static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \ |
474 | show_temp, NULL, num - 1); \ |
475 | static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \ |
476 | show_temp_max, set_temp_max, num - 1); \ |
477 | static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \ |
478 | show_temp_hyst, set_temp_hyst, num - 1) |
479 | |
480 | sysfs_temp(1); |
481 | sysfs_temp(2); |
482 | sysfs_temp(3); |
483 | sysfs_temp(4); |
484 | |
485 | /* VID */ |
486 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, |
487 | char *buf) |
488 | { |
489 | struct asb100_data *data = asb100_update_device(dev); |
490 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); |
491 | } |
492 | |
493 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
494 | |
495 | /* VRM */ |
496 | static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, |
497 | char *buf) |
498 | { |
499 | struct asb100_data *data = dev_get_drvdata(dev); |
500 | return sprintf(buf, "%d\n", data->vrm); |
501 | } |
502 | |
503 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, |
504 | const char *buf, size_t count) |
505 | { |
506 | struct asb100_data *data = dev_get_drvdata(dev); |
507 | unsigned long val; |
508 | int err; |
509 | |
510 | err = kstrtoul(buf, 10, &val); |
511 | if (err) |
512 | return err; |
513 | data->vrm = val; |
514 | return count; |
515 | } |
516 | |
517 | /* Alarms */ |
518 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); |
519 | |
520 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, |
521 | char *buf) |
522 | { |
523 | struct asb100_data *data = asb100_update_device(dev); |
524 | return sprintf(buf, "%u\n", data->alarms); |
525 | } |
526 | |
527 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
528 | |
529 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
530 | char *buf) |
531 | { |
532 | int bitnr = to_sensor_dev_attr(attr)->index; |
533 | struct asb100_data *data = asb100_update_device(dev); |
534 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
535 | } |
536 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
537 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); |
538 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); |
539 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); |
540 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); |
541 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); |
542 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); |
543 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); |
544 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); |
545 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); |
546 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13); |
547 | |
548 | /* 1 PWM */ |
549 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, |
550 | char *buf) |
551 | { |
552 | struct asb100_data *data = asb100_update_device(dev); |
553 | return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f)); |
554 | } |
555 | |
556 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, |
557 | const char *buf, size_t count) |
558 | { |
559 | struct i2c_client *client = to_i2c_client(dev); |
560 | struct asb100_data *data = i2c_get_clientdata(client); |
561 | unsigned long val; |
562 | int err; |
563 | |
564 | err = kstrtoul(buf, 10, &val); |
565 | if (err) |
566 | return err; |
567 | |
568 | mutex_lock(&data->update_lock); |
569 | data->pwm &= 0x80; /* keep the enable bit */ |
570 | data->pwm |= (0x0f & ASB100_PWM_TO_REG(val)); |
571 | asb100_write_value(client, ASB100_REG_PWM1, data->pwm); |
572 | mutex_unlock(&data->update_lock); |
573 | return count; |
574 | } |
575 | |
576 | static ssize_t show_pwm_enable1(struct device *dev, |
577 | struct device_attribute *attr, char *buf) |
578 | { |
579 | struct asb100_data *data = asb100_update_device(dev); |
580 | return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0); |
581 | } |
582 | |
583 | static ssize_t set_pwm_enable1(struct device *dev, |
584 | struct device_attribute *attr, const char *buf, size_t count) |
585 | { |
586 | struct i2c_client *client = to_i2c_client(dev); |
587 | struct asb100_data *data = i2c_get_clientdata(client); |
588 | unsigned long val; |
589 | int err; |
590 | |
591 | err = kstrtoul(buf, 10, &val); |
592 | if (err) |
593 | return err; |
594 | |
595 | mutex_lock(&data->update_lock); |
596 | data->pwm &= 0x0f; /* keep the duty cycle bits */ |
597 | data->pwm |= (val ? 0x80 : 0x00); |
598 | asb100_write_value(client, ASB100_REG_PWM1, data->pwm); |
599 | mutex_unlock(&data->update_lock); |
600 | return count; |
601 | } |
602 | |
603 | static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1); |
604 | static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, |
605 | show_pwm_enable1, set_pwm_enable1); |
606 | |
607 | static struct attribute *asb100_attributes[] = { |
608 | &sensor_dev_attr_in0_input.dev_attr.attr, |
609 | &sensor_dev_attr_in0_min.dev_attr.attr, |
610 | &sensor_dev_attr_in0_max.dev_attr.attr, |
611 | &sensor_dev_attr_in1_input.dev_attr.attr, |
612 | &sensor_dev_attr_in1_min.dev_attr.attr, |
613 | &sensor_dev_attr_in1_max.dev_attr.attr, |
614 | &sensor_dev_attr_in2_input.dev_attr.attr, |
615 | &sensor_dev_attr_in2_min.dev_attr.attr, |
616 | &sensor_dev_attr_in2_max.dev_attr.attr, |
617 | &sensor_dev_attr_in3_input.dev_attr.attr, |
618 | &sensor_dev_attr_in3_min.dev_attr.attr, |
619 | &sensor_dev_attr_in3_max.dev_attr.attr, |
620 | &sensor_dev_attr_in4_input.dev_attr.attr, |
621 | &sensor_dev_attr_in4_min.dev_attr.attr, |
622 | &sensor_dev_attr_in4_max.dev_attr.attr, |
623 | &sensor_dev_attr_in5_input.dev_attr.attr, |
624 | &sensor_dev_attr_in5_min.dev_attr.attr, |
625 | &sensor_dev_attr_in5_max.dev_attr.attr, |
626 | &sensor_dev_attr_in6_input.dev_attr.attr, |
627 | &sensor_dev_attr_in6_min.dev_attr.attr, |
628 | &sensor_dev_attr_in6_max.dev_attr.attr, |
629 | |
630 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
631 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
632 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
633 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
634 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
635 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
636 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
637 | &sensor_dev_attr_fan3_min.dev_attr.attr, |
638 | &sensor_dev_attr_fan3_div.dev_attr.attr, |
639 | |
640 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
641 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
642 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
643 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
644 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
645 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, |
646 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
647 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
648 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, |
649 | &sensor_dev_attr_temp4_input.dev_attr.attr, |
650 | &sensor_dev_attr_temp4_max.dev_attr.attr, |
651 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, |
652 | |
653 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
654 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
655 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
656 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
657 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
658 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
659 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
660 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
661 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
662 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
663 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
664 | |
665 | &dev_attr_cpu0_vid.attr, |
666 | &dev_attr_vrm.attr, |
667 | &dev_attr_alarms.attr, |
668 | &dev_attr_pwm1.attr, |
669 | &dev_attr_pwm1_enable.attr, |
670 | |
671 | NULL |
672 | }; |
673 | |
674 | static const struct attribute_group asb100_group = { |
675 | .attrs = asb100_attributes, |
676 | }; |
677 | |
678 | static int asb100_detect_subclients(struct i2c_client *client) |
679 | { |
680 | int i, id, err; |
681 | int address = client->addr; |
682 | unsigned short sc_addr[2]; |
683 | struct asb100_data *data = i2c_get_clientdata(client); |
684 | struct i2c_adapter *adapter = client->adapter; |
685 | |
686 | id = i2c_adapter_id(adapter); |
687 | |
688 | if (force_subclients[0] == id && force_subclients[1] == address) { |
689 | for (i = 2; i <= 3; i++) { |
690 | if (force_subclients[i] < 0x48 || |
691 | force_subclients[i] > 0x4f) { |
692 | dev_err(&client->dev, "invalid subclient " |
693 | "address %d; must be 0x48-0x4f\n", |
694 | force_subclients[i]); |
695 | err = -ENODEV; |
696 | goto ERROR_SC_2; |
697 | } |
698 | } |
699 | asb100_write_value(client, ASB100_REG_I2C_SUBADDR, |
700 | (force_subclients[2] & 0x07) | |
701 | ((force_subclients[3] & 0x07) << 4)); |
702 | sc_addr[0] = force_subclients[2]; |
703 | sc_addr[1] = force_subclients[3]; |
704 | } else { |
705 | int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR); |
706 | sc_addr[0] = 0x48 + (val & 0x07); |
707 | sc_addr[1] = 0x48 + ((val >> 4) & 0x07); |
708 | } |
709 | |
710 | if (sc_addr[0] == sc_addr[1]) { |
711 | dev_err(&client->dev, "duplicate addresses 0x%x " |
712 | "for subclients\n", sc_addr[0]); |
713 | err = -ENODEV; |
714 | goto ERROR_SC_2; |
715 | } |
716 | |
717 | data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]); |
718 | if (!data->lm75[0]) { |
719 | dev_err(&client->dev, "subclient %d registration " |
720 | "at address 0x%x failed.\n", 1, sc_addr[0]); |
721 | err = -ENOMEM; |
722 | goto ERROR_SC_2; |
723 | } |
724 | |
725 | data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]); |
726 | if (!data->lm75[1]) { |
727 | dev_err(&client->dev, "subclient %d registration " |
728 | "at address 0x%x failed.\n", 2, sc_addr[1]); |
729 | err = -ENOMEM; |
730 | goto ERROR_SC_3; |
731 | } |
732 | |
733 | return 0; |
734 | |
735 | /* Undo inits in case of errors */ |
736 | ERROR_SC_3: |
737 | i2c_unregister_device(data->lm75[0]); |
738 | ERROR_SC_2: |
739 | return err; |
740 | } |
741 | |
742 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
743 | static int asb100_detect(struct i2c_client *client, |
744 | struct i2c_board_info *info) |
745 | { |
746 | struct i2c_adapter *adapter = client->adapter; |
747 | int val1, val2; |
748 | |
749 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
750 | pr_debug("detect failed, smbus byte data not supported!\n"); |
751 | return -ENODEV; |
752 | } |
753 | |
754 | val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK); |
755 | val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); |
756 | |
757 | /* If we're in bank 0 */ |
758 | if ((!(val1 & 0x07)) && |
759 | /* Check for ASB100 ID (low byte) */ |
760 | (((!(val1 & 0x80)) && (val2 != 0x94)) || |
761 | /* Check for ASB100 ID (high byte ) */ |
762 | ((val1 & 0x80) && (val2 != 0x06)))) { |
763 | pr_debug("detect failed, bad chip id 0x%02x!\n", val2); |
764 | return -ENODEV; |
765 | } |
766 | |
767 | /* Put it now into bank 0 and Vendor ID High Byte */ |
768 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, |
769 | (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78) |
770 | | 0x80); |
771 | |
772 | /* Determine the chip type. */ |
773 | val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID); |
774 | val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); |
775 | |
776 | if (val1 != 0x31 || val2 != 0x06) |
777 | return -ENODEV; |
778 | |
779 | strlcpy(info->type, "asb100", I2C_NAME_SIZE); |
780 | |
781 | return 0; |
782 | } |
783 | |
784 | static int asb100_probe(struct i2c_client *client, |
785 | const struct i2c_device_id *id) |
786 | { |
787 | int err; |
788 | struct asb100_data *data; |
789 | |
790 | data = devm_kzalloc(&client->dev, sizeof(struct asb100_data), |
791 | GFP_KERNEL); |
792 | if (!data) |
793 | return -ENOMEM; |
794 | |
795 | i2c_set_clientdata(client, data); |
796 | mutex_init(&data->lock); |
797 | mutex_init(&data->update_lock); |
798 | |
799 | /* Attach secondary lm75 clients */ |
800 | err = asb100_detect_subclients(client); |
801 | if (err) |
802 | return err; |
803 | |
804 | /* Initialize the chip */ |
805 | asb100_init_client(client); |
806 | |
807 | /* A few vars need to be filled upon startup */ |
808 | data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0)); |
809 | data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1)); |
810 | data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2)); |
811 | |
812 | /* Register sysfs hooks */ |
813 | err = sysfs_create_group(&client->dev.kobj, &asb100_group); |
814 | if (err) |
815 | goto ERROR3; |
816 | |
817 | data->hwmon_dev = hwmon_device_register(&client->dev); |
818 | if (IS_ERR(data->hwmon_dev)) { |
819 | err = PTR_ERR(data->hwmon_dev); |
820 | goto ERROR4; |
821 | } |
822 | |
823 | return 0; |
824 | |
825 | ERROR4: |
826 | sysfs_remove_group(&client->dev.kobj, &asb100_group); |
827 | ERROR3: |
828 | i2c_unregister_device(data->lm75[1]); |
829 | i2c_unregister_device(data->lm75[0]); |
830 | return err; |
831 | } |
832 | |
833 | static int asb100_remove(struct i2c_client *client) |
834 | { |
835 | struct asb100_data *data = i2c_get_clientdata(client); |
836 | |
837 | hwmon_device_unregister(data->hwmon_dev); |
838 | sysfs_remove_group(&client->dev.kobj, &asb100_group); |
839 | |
840 | i2c_unregister_device(data->lm75[1]); |
841 | i2c_unregister_device(data->lm75[0]); |
842 | |
843 | return 0; |
844 | } |
845 | |
846 | /* |
847 | * The SMBus locks itself, usually, but nothing may access the chip between |
848 | * bank switches. |
849 | */ |
850 | static int asb100_read_value(struct i2c_client *client, u16 reg) |
851 | { |
852 | struct asb100_data *data = i2c_get_clientdata(client); |
853 | struct i2c_client *cl; |
854 | int res, bank; |
855 | |
856 | mutex_lock(&data->lock); |
857 | |
858 | bank = (reg >> 8) & 0x0f; |
859 | if (bank > 2) |
860 | /* switch banks */ |
861 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); |
862 | |
863 | if (bank == 0 || bank > 2) { |
864 | res = i2c_smbus_read_byte_data(client, reg & 0xff); |
865 | } else { |
866 | /* switch to subclient */ |
867 | cl = data->lm75[bank - 1]; |
868 | |
869 | /* convert from ISA to LM75 I2C addresses */ |
870 | switch (reg & 0xff) { |
871 | case 0x50: /* TEMP */ |
872 | res = i2c_smbus_read_word_swapped(cl, 0); |
873 | break; |
874 | case 0x52: /* CONFIG */ |
875 | res = i2c_smbus_read_byte_data(cl, 1); |
876 | break; |
877 | case 0x53: /* HYST */ |
878 | res = i2c_smbus_read_word_swapped(cl, 2); |
879 | break; |
880 | case 0x55: /* MAX */ |
881 | default: |
882 | res = i2c_smbus_read_word_swapped(cl, 3); |
883 | break; |
884 | } |
885 | } |
886 | |
887 | if (bank > 2) |
888 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); |
889 | |
890 | mutex_unlock(&data->lock); |
891 | |
892 | return res; |
893 | } |
894 | |
895 | static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value) |
896 | { |
897 | struct asb100_data *data = i2c_get_clientdata(client); |
898 | struct i2c_client *cl; |
899 | int bank; |
900 | |
901 | mutex_lock(&data->lock); |
902 | |
903 | bank = (reg >> 8) & 0x0f; |
904 | if (bank > 2) |
905 | /* switch banks */ |
906 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); |
907 | |
908 | if (bank == 0 || bank > 2) { |
909 | i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff); |
910 | } else { |
911 | /* switch to subclient */ |
912 | cl = data->lm75[bank - 1]; |
913 | |
914 | /* convert from ISA to LM75 I2C addresses */ |
915 | switch (reg & 0xff) { |
916 | case 0x52: /* CONFIG */ |
917 | i2c_smbus_write_byte_data(cl, 1, value & 0xff); |
918 | break; |
919 | case 0x53: /* HYST */ |
920 | i2c_smbus_write_word_swapped(cl, 2, value); |
921 | break; |
922 | case 0x55: /* MAX */ |
923 | i2c_smbus_write_word_swapped(cl, 3, value); |
924 | break; |
925 | } |
926 | } |
927 | |
928 | if (bank > 2) |
929 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); |
930 | |
931 | mutex_unlock(&data->lock); |
932 | } |
933 | |
934 | static void asb100_init_client(struct i2c_client *client) |
935 | { |
936 | struct asb100_data *data = i2c_get_clientdata(client); |
937 | |
938 | data->vrm = vid_which_vrm(); |
939 | |
940 | /* Start monitoring */ |
941 | asb100_write_value(client, ASB100_REG_CONFIG, |
942 | (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01); |
943 | } |
944 | |
945 | static struct asb100_data *asb100_update_device(struct device *dev) |
946 | { |
947 | struct i2c_client *client = to_i2c_client(dev); |
948 | struct asb100_data *data = i2c_get_clientdata(client); |
949 | int i; |
950 | |
951 | mutex_lock(&data->update_lock); |
952 | |
953 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
954 | || !data->valid) { |
955 | |
956 | dev_dbg(&client->dev, "starting device update...\n"); |
957 | |
958 | /* 7 voltage inputs */ |
959 | for (i = 0; i < 7; i++) { |
960 | data->in[i] = asb100_read_value(client, |
961 | ASB100_REG_IN(i)); |
962 | data->in_min[i] = asb100_read_value(client, |
963 | ASB100_REG_IN_MIN(i)); |
964 | data->in_max[i] = asb100_read_value(client, |
965 | ASB100_REG_IN_MAX(i)); |
966 | } |
967 | |
968 | /* 3 fan inputs */ |
969 | for (i = 0; i < 3; i++) { |
970 | data->fan[i] = asb100_read_value(client, |
971 | ASB100_REG_FAN(i)); |
972 | data->fan_min[i] = asb100_read_value(client, |
973 | ASB100_REG_FAN_MIN(i)); |
974 | } |
975 | |
976 | /* 4 temperature inputs */ |
977 | for (i = 1; i <= 4; i++) { |
978 | data->temp[i-1] = asb100_read_value(client, |
979 | ASB100_REG_TEMP(i)); |
980 | data->temp_max[i-1] = asb100_read_value(client, |
981 | ASB100_REG_TEMP_MAX(i)); |
982 | data->temp_hyst[i-1] = asb100_read_value(client, |
983 | ASB100_REG_TEMP_HYST(i)); |
984 | } |
985 | |
986 | /* VID and fan divisors */ |
987 | i = asb100_read_value(client, ASB100_REG_VID_FANDIV); |
988 | data->vid = i & 0x0f; |
989 | data->vid |= (asb100_read_value(client, |
990 | ASB100_REG_CHIPID) & 0x01) << 4; |
991 | data->fan_div[0] = (i >> 4) & 0x03; |
992 | data->fan_div[1] = (i >> 6) & 0x03; |
993 | data->fan_div[2] = (asb100_read_value(client, |
994 | ASB100_REG_PIN) >> 6) & 0x03; |
995 | |
996 | /* PWM */ |
997 | data->pwm = asb100_read_value(client, ASB100_REG_PWM1); |
998 | |
999 | /* alarms */ |
1000 | data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) + |
1001 | (asb100_read_value(client, ASB100_REG_ALARM2) << 8); |
1002 | |
1003 | data->last_updated = jiffies; |
1004 | data->valid = 1; |
1005 | |
1006 | dev_dbg(&client->dev, "... device update complete\n"); |
1007 | } |
1008 | |
1009 | mutex_unlock(&data->update_lock); |
1010 | |
1011 | return data; |
1012 | } |
1013 | |
1014 | module_i2c_driver(asb100_driver); |
1015 | |
1016 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); |
1017 | MODULE_DESCRIPTION("ASB100 Bach driver"); |
1018 | MODULE_LICENSE("GPL"); |
1019 |
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