1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * asb100.c - Part of lm_sensors, Linux kernel modules for hardware |
4 | * monitoring |
5 | * |
6 | * Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com> |
7 | * |
8 | * (derived from w83781d.c) |
9 | * |
10 | * Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>, |
11 | * Philip Edelbrock <phil@netroedge.com>, and |
12 | * Mark Studebaker <mdsxyz123@yahoo.com> |
13 | */ |
14 | |
15 | /* |
16 | * This driver supports the hardware sensor chips: Asus ASB100 and |
17 | * ASB100-A "BACH". |
18 | * |
19 | * ASB100-A supports pwm1, while plain ASB100 does not. There is no known |
20 | * way for the driver to tell which one is there. |
21 | * |
22 | * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA |
23 | * asb100 7 3 1 4 0x31 0x0694 yes no |
24 | */ |
25 | |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | |
28 | #include <linux/module.h> |
29 | #include <linux/slab.h> |
30 | #include <linux/i2c.h> |
31 | #include <linux/hwmon.h> |
32 | #include <linux/hwmon-sysfs.h> |
33 | #include <linux/hwmon-vid.h> |
34 | #include <linux/err.h> |
35 | #include <linux/init.h> |
36 | #include <linux/jiffies.h> |
37 | #include <linux/mutex.h> |
38 | #include "lm75.h" |
39 | |
40 | /* I2C addresses to scan */ |
41 | static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END }; |
42 | |
43 | static unsigned short force_subclients[4]; |
44 | module_param_array(force_subclients, short, NULL, 0); |
45 | MODULE_PARM_DESC(force_subclients, |
46 | "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}" ); |
47 | |
48 | /* Voltage IN registers 0-6 */ |
49 | #define ASB100_REG_IN(nr) (0x20 + (nr)) |
50 | #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2)) |
51 | #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2)) |
52 | |
53 | /* FAN IN registers 1-3 */ |
54 | #define ASB100_REG_FAN(nr) (0x28 + (nr)) |
55 | #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr)) |
56 | |
57 | /* TEMPERATURE registers 1-4 */ |
58 | static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17}; |
59 | static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18}; |
60 | static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19}; |
61 | |
62 | #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr]) |
63 | #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr]) |
64 | #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr]) |
65 | |
66 | #define ASB100_REG_TEMP2_CONFIG 0x0152 |
67 | #define ASB100_REG_TEMP3_CONFIG 0x0252 |
68 | |
69 | |
70 | #define ASB100_REG_CONFIG 0x40 |
71 | #define ASB100_REG_ALARM1 0x41 |
72 | #define ASB100_REG_ALARM2 0x42 |
73 | #define ASB100_REG_SMIM1 0x43 |
74 | #define ASB100_REG_SMIM2 0x44 |
75 | #define ASB100_REG_VID_FANDIV 0x47 |
76 | #define ASB100_REG_I2C_ADDR 0x48 |
77 | #define ASB100_REG_CHIPID 0x49 |
78 | #define ASB100_REG_I2C_SUBADDR 0x4a |
79 | #define ASB100_REG_PIN 0x4b |
80 | #define ASB100_REG_IRQ 0x4c |
81 | #define ASB100_REG_BANK 0x4e |
82 | #define ASB100_REG_CHIPMAN 0x4f |
83 | |
84 | #define ASB100_REG_WCHIPID 0x58 |
85 | |
86 | /* bit 7 -> enable, bits 0-3 -> duty cycle */ |
87 | #define ASB100_REG_PWM1 0x59 |
88 | |
89 | /* |
90 | * CONVERSIONS |
91 | * Rounding and limit checking is only done on the TO_REG variants. |
92 | */ |
93 | |
94 | /* These constants are a guess, consistent w/ w83781d */ |
95 | #define ASB100_IN_MIN 0 |
96 | #define ASB100_IN_MAX 4080 |
97 | |
98 | /* |
99 | * IN: 1/1000 V (0V to 4.08V) |
100 | * REG: 16mV/bit |
101 | */ |
102 | static u8 IN_TO_REG(unsigned val) |
103 | { |
104 | unsigned nval = clamp_val(val, ASB100_IN_MIN, ASB100_IN_MAX); |
105 | return (nval + 8) / 16; |
106 | } |
107 | |
108 | static unsigned IN_FROM_REG(u8 reg) |
109 | { |
110 | return reg * 16; |
111 | } |
112 | |
113 | static u8 FAN_TO_REG(long rpm, int div) |
114 | { |
115 | if (rpm == -1) |
116 | return 0; |
117 | if (rpm == 0) |
118 | return 255; |
119 | rpm = clamp_val(rpm, 1, 1000000); |
120 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
121 | } |
122 | |
123 | static int FAN_FROM_REG(u8 val, int div) |
124 | { |
125 | return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); |
126 | } |
127 | |
128 | /* These constants are a guess, consistent w/ w83781d */ |
129 | #define ASB100_TEMP_MIN -128000 |
130 | #define ASB100_TEMP_MAX 127000 |
131 | |
132 | /* |
133 | * TEMP: 0.001C/bit (-128C to +127C) |
134 | * REG: 1C/bit, two's complement |
135 | */ |
136 | static u8 TEMP_TO_REG(long temp) |
137 | { |
138 | int ntemp = clamp_val(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX); |
139 | ntemp += (ntemp < 0 ? -500 : 500); |
140 | return (u8)(ntemp / 1000); |
141 | } |
142 | |
143 | static int TEMP_FROM_REG(u8 reg) |
144 | { |
145 | return (s8)reg * 1000; |
146 | } |
147 | |
148 | /* |
149 | * PWM: 0 - 255 per sensors documentation |
150 | * REG: (6.25% duty cycle per bit) |
151 | */ |
152 | static u8 ASB100_PWM_TO_REG(int pwm) |
153 | { |
154 | pwm = clamp_val(pwm, 0, 255); |
155 | return (u8)(pwm / 16); |
156 | } |
157 | |
158 | static int ASB100_PWM_FROM_REG(u8 reg) |
159 | { |
160 | return reg * 16; |
161 | } |
162 | |
163 | #define DIV_FROM_REG(val) (1 << (val)) |
164 | |
165 | /* |
166 | * FAN DIV: 1, 2, 4, or 8 (defaults to 2) |
167 | * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) |
168 | */ |
169 | static u8 DIV_TO_REG(long val) |
170 | { |
171 | return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; |
172 | } |
173 | |
174 | /* |
175 | * For each registered client, we need to keep some data in memory. That |
176 | * data is pointed to by client->data. The structure itself is |
177 | * dynamically allocated, at the same time the client itself is allocated. |
178 | */ |
179 | struct asb100_data { |
180 | struct device *hwmon_dev; |
181 | struct mutex lock; |
182 | |
183 | struct mutex update_lock; |
184 | unsigned long last_updated; /* In jiffies */ |
185 | |
186 | /* array of 2 pointers to subclients */ |
187 | struct i2c_client *lm75[2]; |
188 | |
189 | bool valid; /* true if following fields are valid */ |
190 | u8 in[7]; /* Register value */ |
191 | u8 in_max[7]; /* Register value */ |
192 | u8 in_min[7]; /* Register value */ |
193 | u8 fan[3]; /* Register value */ |
194 | u8 fan_min[3]; /* Register value */ |
195 | u16 temp[4]; /* Register value (0 and 3 are u8 only) */ |
196 | u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */ |
197 | u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */ |
198 | u8 fan_div[3]; /* Register encoding, right justified */ |
199 | u8 pwm; /* Register encoding */ |
200 | u8 vid; /* Register encoding, combined */ |
201 | u32 alarms; /* Register encoding, combined */ |
202 | u8 vrm; |
203 | }; |
204 | |
205 | static int asb100_read_value(struct i2c_client *client, u16 reg); |
206 | static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val); |
207 | |
208 | static int asb100_probe(struct i2c_client *client); |
209 | static int asb100_detect(struct i2c_client *client, |
210 | struct i2c_board_info *info); |
211 | static void asb100_remove(struct i2c_client *client); |
212 | static struct asb100_data *asb100_update_device(struct device *dev); |
213 | static void asb100_init_client(struct i2c_client *client); |
214 | |
215 | static const struct i2c_device_id asb100_id[] = { |
216 | { "asb100" , 0 }, |
217 | { } |
218 | }; |
219 | MODULE_DEVICE_TABLE(i2c, asb100_id); |
220 | |
221 | static struct i2c_driver asb100_driver = { |
222 | .class = I2C_CLASS_HWMON, |
223 | .driver = { |
224 | .name = "asb100" , |
225 | }, |
226 | .probe = asb100_probe, |
227 | .remove = asb100_remove, |
228 | .id_table = asb100_id, |
229 | .detect = asb100_detect, |
230 | .address_list = normal_i2c, |
231 | }; |
232 | |
233 | /* 7 Voltages */ |
234 | #define show_in_reg(reg) \ |
235 | static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
236 | char *buf) \ |
237 | { \ |
238 | int nr = to_sensor_dev_attr(attr)->index; \ |
239 | struct asb100_data *data = asb100_update_device(dev); \ |
240 | return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ |
241 | } |
242 | |
243 | show_in_reg(in) |
244 | show_in_reg(in_min) |
245 | show_in_reg(in_max) |
246 | |
247 | #define set_in_reg(REG, reg) \ |
248 | static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \ |
249 | const char *buf, size_t count) \ |
250 | { \ |
251 | int nr = to_sensor_dev_attr(attr)->index; \ |
252 | struct i2c_client *client = to_i2c_client(dev); \ |
253 | struct asb100_data *data = i2c_get_clientdata(client); \ |
254 | unsigned long val; \ |
255 | int err = kstrtoul(buf, 10, &val); \ |
256 | if (err) \ |
257 | return err; \ |
258 | mutex_lock(&data->update_lock); \ |
259 | data->in_##reg[nr] = IN_TO_REG(val); \ |
260 | asb100_write_value(client, ASB100_REG_IN_##REG(nr), \ |
261 | data->in_##reg[nr]); \ |
262 | mutex_unlock(&data->update_lock); \ |
263 | return count; \ |
264 | } |
265 | |
266 | set_in_reg(MIN, min) |
267 | set_in_reg(MAX, max) |
268 | |
269 | #define sysfs_in(offset) \ |
270 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
271 | show_in, NULL, offset); \ |
272 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
273 | show_in_min, set_in_min, offset); \ |
274 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ |
275 | show_in_max, set_in_max, offset) |
276 | |
277 | sysfs_in(0); |
278 | sysfs_in(1); |
279 | sysfs_in(2); |
280 | sysfs_in(3); |
281 | sysfs_in(4); |
282 | sysfs_in(5); |
283 | sysfs_in(6); |
284 | |
285 | /* 3 Fans */ |
286 | static ssize_t show_fan(struct device *dev, struct device_attribute *attr, |
287 | char *buf) |
288 | { |
289 | int nr = to_sensor_dev_attr(attr)->index; |
290 | struct asb100_data *data = asb100_update_device(dev); |
291 | return sprintf(buf, fmt: "%d\n" , FAN_FROM_REG(val: data->fan[nr], |
292 | DIV_FROM_REG(data->fan_div[nr]))); |
293 | } |
294 | |
295 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, |
296 | char *buf) |
297 | { |
298 | int nr = to_sensor_dev_attr(attr)->index; |
299 | struct asb100_data *data = asb100_update_device(dev); |
300 | return sprintf(buf, fmt: "%d\n" , FAN_FROM_REG(val: data->fan_min[nr], |
301 | DIV_FROM_REG(data->fan_div[nr]))); |
302 | } |
303 | |
304 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, |
305 | char *buf) |
306 | { |
307 | int nr = to_sensor_dev_attr(attr)->index; |
308 | struct asb100_data *data = asb100_update_device(dev); |
309 | return sprintf(buf, fmt: "%d\n" , DIV_FROM_REG(data->fan_div[nr])); |
310 | } |
311 | |
312 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, |
313 | const char *buf, size_t count) |
314 | { |
315 | int nr = to_sensor_dev_attr(attr)->index; |
316 | struct i2c_client *client = to_i2c_client(dev); |
317 | struct asb100_data *data = i2c_get_clientdata(client); |
318 | unsigned long val; |
319 | int err; |
320 | |
321 | err = kstrtoul(s: buf, base: 10, res: &val); |
322 | if (err) |
323 | return err; |
324 | |
325 | mutex_lock(&data->update_lock); |
326 | data->fan_min[nr] = FAN_TO_REG(rpm: val, DIV_FROM_REG(data->fan_div[nr])); |
327 | asb100_write_value(client, ASB100_REG_FAN_MIN(nr), val: data->fan_min[nr]); |
328 | mutex_unlock(lock: &data->update_lock); |
329 | return count; |
330 | } |
331 | |
332 | /* |
333 | * Note: we save and restore the fan minimum here, because its value is |
334 | * determined in part by the fan divisor. This follows the principle of |
335 | * least surprise; the user doesn't expect the fan minimum to change just |
336 | * because the divisor changed. |
337 | */ |
338 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, |
339 | const char *buf, size_t count) |
340 | { |
341 | int nr = to_sensor_dev_attr(attr)->index; |
342 | struct i2c_client *client = to_i2c_client(dev); |
343 | struct asb100_data *data = i2c_get_clientdata(client); |
344 | unsigned long min; |
345 | int reg; |
346 | unsigned long val; |
347 | int err; |
348 | |
349 | err = kstrtoul(s: buf, base: 10, res: &val); |
350 | if (err) |
351 | return err; |
352 | |
353 | mutex_lock(&data->update_lock); |
354 | |
355 | min = FAN_FROM_REG(val: data->fan_min[nr], |
356 | DIV_FROM_REG(data->fan_div[nr])); |
357 | data->fan_div[nr] = DIV_TO_REG(val); |
358 | |
359 | switch (nr) { |
360 | case 0: /* fan 1 */ |
361 | reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); |
362 | reg = (reg & 0xcf) | (data->fan_div[0] << 4); |
363 | asb100_write_value(client, ASB100_REG_VID_FANDIV, val: reg); |
364 | break; |
365 | |
366 | case 1: /* fan 2 */ |
367 | reg = asb100_read_value(client, ASB100_REG_VID_FANDIV); |
368 | reg = (reg & 0x3f) | (data->fan_div[1] << 6); |
369 | asb100_write_value(client, ASB100_REG_VID_FANDIV, val: reg); |
370 | break; |
371 | |
372 | case 2: /* fan 3 */ |
373 | reg = asb100_read_value(client, ASB100_REG_PIN); |
374 | reg = (reg & 0x3f) | (data->fan_div[2] << 6); |
375 | asb100_write_value(client, ASB100_REG_PIN, val: reg); |
376 | break; |
377 | } |
378 | |
379 | data->fan_min[nr] = |
380 | FAN_TO_REG(rpm: min, DIV_FROM_REG(data->fan_div[nr])); |
381 | asb100_write_value(client, ASB100_REG_FAN_MIN(nr), val: data->fan_min[nr]); |
382 | |
383 | mutex_unlock(lock: &data->update_lock); |
384 | |
385 | return count; |
386 | } |
387 | |
388 | #define sysfs_fan(offset) \ |
389 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ |
390 | show_fan, NULL, offset - 1); \ |
391 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
392 | show_fan_min, set_fan_min, offset - 1); \ |
393 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ |
394 | show_fan_div, set_fan_div, offset - 1) |
395 | |
396 | sysfs_fan(1); |
397 | sysfs_fan(2); |
398 | sysfs_fan(3); |
399 | |
400 | /* 4 Temp. Sensors */ |
401 | static int sprintf_temp_from_reg(u16 reg, char *buf, int nr) |
402 | { |
403 | int ret = 0; |
404 | |
405 | switch (nr) { |
406 | case 1: case 2: |
407 | ret = sprintf(buf, fmt: "%d\n" , LM75_TEMP_FROM_REG(reg)); |
408 | break; |
409 | case 0: case 3: default: |
410 | ret = sprintf(buf, fmt: "%d\n" , TEMP_FROM_REG(reg)); |
411 | break; |
412 | } |
413 | return ret; |
414 | } |
415 | |
416 | #define show_temp_reg(reg) \ |
417 | static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ |
418 | char *buf) \ |
419 | { \ |
420 | int nr = to_sensor_dev_attr(attr)->index; \ |
421 | struct asb100_data *data = asb100_update_device(dev); \ |
422 | return sprintf_temp_from_reg(data->reg[nr], buf, nr); \ |
423 | } |
424 | |
425 | show_temp_reg(temp); |
426 | show_temp_reg(temp_max); |
427 | show_temp_reg(temp_hyst); |
428 | |
429 | #define set_temp_reg(REG, reg) \ |
430 | static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \ |
431 | const char *buf, size_t count) \ |
432 | { \ |
433 | int nr = to_sensor_dev_attr(attr)->index; \ |
434 | struct i2c_client *client = to_i2c_client(dev); \ |
435 | struct asb100_data *data = i2c_get_clientdata(client); \ |
436 | long val; \ |
437 | int err = kstrtol(buf, 10, &val); \ |
438 | if (err) \ |
439 | return err; \ |
440 | mutex_lock(&data->update_lock); \ |
441 | switch (nr) { \ |
442 | case 1: case 2: \ |
443 | data->reg[nr] = LM75_TEMP_TO_REG(val); \ |
444 | break; \ |
445 | case 0: case 3: default: \ |
446 | data->reg[nr] = TEMP_TO_REG(val); \ |
447 | break; \ |
448 | } \ |
449 | asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \ |
450 | data->reg[nr]); \ |
451 | mutex_unlock(&data->update_lock); \ |
452 | return count; \ |
453 | } |
454 | |
455 | set_temp_reg(MAX, temp_max); |
456 | set_temp_reg(HYST, temp_hyst); |
457 | |
458 | #define sysfs_temp(num) \ |
459 | static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \ |
460 | show_temp, NULL, num - 1); \ |
461 | static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \ |
462 | show_temp_max, set_temp_max, num - 1); \ |
463 | static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \ |
464 | show_temp_hyst, set_temp_hyst, num - 1) |
465 | |
466 | sysfs_temp(1); |
467 | sysfs_temp(2); |
468 | sysfs_temp(3); |
469 | sysfs_temp(4); |
470 | |
471 | /* VID */ |
472 | static ssize_t cpu0_vid_show(struct device *dev, |
473 | struct device_attribute *attr, char *buf) |
474 | { |
475 | struct asb100_data *data = asb100_update_device(dev); |
476 | return sprintf(buf, fmt: "%d\n" , vid_from_reg(val: data->vid, vrm: data->vrm)); |
477 | } |
478 | |
479 | static DEVICE_ATTR_RO(cpu0_vid); |
480 | |
481 | /* VRM */ |
482 | static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, |
483 | char *buf) |
484 | { |
485 | struct asb100_data *data = dev_get_drvdata(dev); |
486 | return sprintf(buf, fmt: "%d\n" , data->vrm); |
487 | } |
488 | |
489 | static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, |
490 | const char *buf, size_t count) |
491 | { |
492 | struct asb100_data *data = dev_get_drvdata(dev); |
493 | unsigned long val; |
494 | int err; |
495 | |
496 | err = kstrtoul(s: buf, base: 10, res: &val); |
497 | if (err) |
498 | return err; |
499 | |
500 | if (val > 255) |
501 | return -EINVAL; |
502 | |
503 | data->vrm = val; |
504 | return count; |
505 | } |
506 | |
507 | /* Alarms */ |
508 | static DEVICE_ATTR_RW(vrm); |
509 | |
510 | static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, |
511 | char *buf) |
512 | { |
513 | struct asb100_data *data = asb100_update_device(dev); |
514 | return sprintf(buf, fmt: "%u\n" , data->alarms); |
515 | } |
516 | |
517 | static DEVICE_ATTR_RO(alarms); |
518 | |
519 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
520 | char *buf) |
521 | { |
522 | int bitnr = to_sensor_dev_attr(attr)->index; |
523 | struct asb100_data *data = asb100_update_device(dev); |
524 | return sprintf(buf, fmt: "%u\n" , (data->alarms >> bitnr) & 1); |
525 | } |
526 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
527 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); |
528 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); |
529 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); |
530 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); |
531 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); |
532 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); |
533 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); |
534 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); |
535 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); |
536 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13); |
537 | |
538 | /* 1 PWM */ |
539 | static ssize_t pwm1_show(struct device *dev, struct device_attribute *attr, |
540 | char *buf) |
541 | { |
542 | struct asb100_data *data = asb100_update_device(dev); |
543 | return sprintf(buf, fmt: "%d\n" , ASB100_PWM_FROM_REG(reg: data->pwm & 0x0f)); |
544 | } |
545 | |
546 | static ssize_t pwm1_store(struct device *dev, struct device_attribute *attr, |
547 | const char *buf, size_t count) |
548 | { |
549 | struct i2c_client *client = to_i2c_client(dev); |
550 | struct asb100_data *data = i2c_get_clientdata(client); |
551 | unsigned long val; |
552 | int err; |
553 | |
554 | err = kstrtoul(s: buf, base: 10, res: &val); |
555 | if (err) |
556 | return err; |
557 | |
558 | mutex_lock(&data->update_lock); |
559 | data->pwm &= 0x80; /* keep the enable bit */ |
560 | data->pwm |= (0x0f & ASB100_PWM_TO_REG(pwm: val)); |
561 | asb100_write_value(client, ASB100_REG_PWM1, val: data->pwm); |
562 | mutex_unlock(lock: &data->update_lock); |
563 | return count; |
564 | } |
565 | |
566 | static ssize_t pwm1_enable_show(struct device *dev, |
567 | struct device_attribute *attr, char *buf) |
568 | { |
569 | struct asb100_data *data = asb100_update_device(dev); |
570 | return sprintf(buf, fmt: "%d\n" , (data->pwm & 0x80) ? 1 : 0); |
571 | } |
572 | |
573 | static ssize_t pwm1_enable_store(struct device *dev, |
574 | struct device_attribute *attr, |
575 | const char *buf, size_t count) |
576 | { |
577 | struct i2c_client *client = to_i2c_client(dev); |
578 | struct asb100_data *data = i2c_get_clientdata(client); |
579 | unsigned long val; |
580 | int err; |
581 | |
582 | err = kstrtoul(s: buf, base: 10, res: &val); |
583 | if (err) |
584 | return err; |
585 | |
586 | mutex_lock(&data->update_lock); |
587 | data->pwm &= 0x0f; /* keep the duty cycle bits */ |
588 | data->pwm |= (val ? 0x80 : 0x00); |
589 | asb100_write_value(client, ASB100_REG_PWM1, val: data->pwm); |
590 | mutex_unlock(lock: &data->update_lock); |
591 | return count; |
592 | } |
593 | |
594 | static DEVICE_ATTR_RW(pwm1); |
595 | static DEVICE_ATTR_RW(pwm1_enable); |
596 | |
597 | static struct attribute *asb100_attributes[] = { |
598 | &sensor_dev_attr_in0_input.dev_attr.attr, |
599 | &sensor_dev_attr_in0_min.dev_attr.attr, |
600 | &sensor_dev_attr_in0_max.dev_attr.attr, |
601 | &sensor_dev_attr_in1_input.dev_attr.attr, |
602 | &sensor_dev_attr_in1_min.dev_attr.attr, |
603 | &sensor_dev_attr_in1_max.dev_attr.attr, |
604 | &sensor_dev_attr_in2_input.dev_attr.attr, |
605 | &sensor_dev_attr_in2_min.dev_attr.attr, |
606 | &sensor_dev_attr_in2_max.dev_attr.attr, |
607 | &sensor_dev_attr_in3_input.dev_attr.attr, |
608 | &sensor_dev_attr_in3_min.dev_attr.attr, |
609 | &sensor_dev_attr_in3_max.dev_attr.attr, |
610 | &sensor_dev_attr_in4_input.dev_attr.attr, |
611 | &sensor_dev_attr_in4_min.dev_attr.attr, |
612 | &sensor_dev_attr_in4_max.dev_attr.attr, |
613 | &sensor_dev_attr_in5_input.dev_attr.attr, |
614 | &sensor_dev_attr_in5_min.dev_attr.attr, |
615 | &sensor_dev_attr_in5_max.dev_attr.attr, |
616 | &sensor_dev_attr_in6_input.dev_attr.attr, |
617 | &sensor_dev_attr_in6_min.dev_attr.attr, |
618 | &sensor_dev_attr_in6_max.dev_attr.attr, |
619 | |
620 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
621 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
622 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
623 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
624 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
625 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
626 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
627 | &sensor_dev_attr_fan3_min.dev_attr.attr, |
628 | &sensor_dev_attr_fan3_div.dev_attr.attr, |
629 | |
630 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
631 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
632 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
633 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
634 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
635 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, |
636 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
637 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
638 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, |
639 | &sensor_dev_attr_temp4_input.dev_attr.attr, |
640 | &sensor_dev_attr_temp4_max.dev_attr.attr, |
641 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, |
642 | |
643 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
644 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
645 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
646 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
647 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
648 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
649 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
650 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
651 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
652 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
653 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
654 | |
655 | &dev_attr_cpu0_vid.attr, |
656 | &dev_attr_vrm.attr, |
657 | &dev_attr_alarms.attr, |
658 | &dev_attr_pwm1.attr, |
659 | &dev_attr_pwm1_enable.attr, |
660 | |
661 | NULL |
662 | }; |
663 | |
664 | static const struct attribute_group asb100_group = { |
665 | .attrs = asb100_attributes, |
666 | }; |
667 | |
668 | static int asb100_detect_subclients(struct i2c_client *client) |
669 | { |
670 | int i, id, err; |
671 | int address = client->addr; |
672 | unsigned short sc_addr[2]; |
673 | struct asb100_data *data = i2c_get_clientdata(client); |
674 | struct i2c_adapter *adapter = client->adapter; |
675 | |
676 | id = i2c_adapter_id(adap: adapter); |
677 | |
678 | if (force_subclients[0] == id && force_subclients[1] == address) { |
679 | for (i = 2; i <= 3; i++) { |
680 | if (force_subclients[i] < 0x48 || |
681 | force_subclients[i] > 0x4f) { |
682 | dev_err(&client->dev, |
683 | "invalid subclient address %d; must be 0x48-0x4f\n" , |
684 | force_subclients[i]); |
685 | err = -ENODEV; |
686 | goto ERROR_SC_2; |
687 | } |
688 | } |
689 | asb100_write_value(client, ASB100_REG_I2C_SUBADDR, |
690 | val: (force_subclients[2] & 0x07) | |
691 | ((force_subclients[3] & 0x07) << 4)); |
692 | sc_addr[0] = force_subclients[2]; |
693 | sc_addr[1] = force_subclients[3]; |
694 | } else { |
695 | int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR); |
696 | sc_addr[0] = 0x48 + (val & 0x07); |
697 | sc_addr[1] = 0x48 + ((val >> 4) & 0x07); |
698 | } |
699 | |
700 | if (sc_addr[0] == sc_addr[1]) { |
701 | dev_err(&client->dev, |
702 | "duplicate addresses 0x%x for subclients\n" , |
703 | sc_addr[0]); |
704 | err = -ENODEV; |
705 | goto ERROR_SC_2; |
706 | } |
707 | |
708 | data->lm75[0] = i2c_new_dummy_device(adapter, address: sc_addr[0]); |
709 | if (IS_ERR(ptr: data->lm75[0])) { |
710 | dev_err(&client->dev, |
711 | "subclient %d registration at address 0x%x failed.\n" , |
712 | 1, sc_addr[0]); |
713 | err = PTR_ERR(ptr: data->lm75[0]); |
714 | goto ERROR_SC_2; |
715 | } |
716 | |
717 | data->lm75[1] = i2c_new_dummy_device(adapter, address: sc_addr[1]); |
718 | if (IS_ERR(ptr: data->lm75[1])) { |
719 | dev_err(&client->dev, |
720 | "subclient %d registration at address 0x%x failed.\n" , |
721 | 2, sc_addr[1]); |
722 | err = PTR_ERR(ptr: data->lm75[1]); |
723 | goto ERROR_SC_3; |
724 | } |
725 | |
726 | return 0; |
727 | |
728 | /* Undo inits in case of errors */ |
729 | ERROR_SC_3: |
730 | i2c_unregister_device(client: data->lm75[0]); |
731 | ERROR_SC_2: |
732 | return err; |
733 | } |
734 | |
735 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
736 | static int asb100_detect(struct i2c_client *client, |
737 | struct i2c_board_info *info) |
738 | { |
739 | struct i2c_adapter *adapter = client->adapter; |
740 | int val1, val2; |
741 | |
742 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
743 | pr_debug("detect failed, smbus byte data not supported!\n" ); |
744 | return -ENODEV; |
745 | } |
746 | |
747 | val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK); |
748 | val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); |
749 | |
750 | /* If we're in bank 0 */ |
751 | if ((!(val1 & 0x07)) && |
752 | /* Check for ASB100 ID (low byte) */ |
753 | (((!(val1 & 0x80)) && (val2 != 0x94)) || |
754 | /* Check for ASB100 ID (high byte ) */ |
755 | ((val1 & 0x80) && (val2 != 0x06)))) { |
756 | pr_debug("detect failed, bad chip id 0x%02x!\n" , val2); |
757 | return -ENODEV; |
758 | } |
759 | |
760 | /* Put it now into bank 0 and Vendor ID High Byte */ |
761 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, |
762 | value: (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78) |
763 | | 0x80); |
764 | |
765 | /* Determine the chip type. */ |
766 | val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID); |
767 | val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); |
768 | |
769 | if (val1 != 0x31 || val2 != 0x06) |
770 | return -ENODEV; |
771 | |
772 | strscpy(p: info->type, q: "asb100" , I2C_NAME_SIZE); |
773 | |
774 | return 0; |
775 | } |
776 | |
777 | static int asb100_probe(struct i2c_client *client) |
778 | { |
779 | int err; |
780 | struct asb100_data *data; |
781 | |
782 | data = devm_kzalloc(dev: &client->dev, size: sizeof(struct asb100_data), |
783 | GFP_KERNEL); |
784 | if (!data) |
785 | return -ENOMEM; |
786 | |
787 | i2c_set_clientdata(client, data); |
788 | mutex_init(&data->lock); |
789 | mutex_init(&data->update_lock); |
790 | |
791 | /* Attach secondary lm75 clients */ |
792 | err = asb100_detect_subclients(client); |
793 | if (err) |
794 | return err; |
795 | |
796 | /* Initialize the chip */ |
797 | asb100_init_client(client); |
798 | |
799 | /* A few vars need to be filled upon startup */ |
800 | data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0)); |
801 | data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1)); |
802 | data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2)); |
803 | |
804 | /* Register sysfs hooks */ |
805 | err = sysfs_create_group(kobj: &client->dev.kobj, grp: &asb100_group); |
806 | if (err) |
807 | goto ERROR3; |
808 | |
809 | data->hwmon_dev = hwmon_device_register(dev: &client->dev); |
810 | if (IS_ERR(ptr: data->hwmon_dev)) { |
811 | err = PTR_ERR(ptr: data->hwmon_dev); |
812 | goto ERROR4; |
813 | } |
814 | |
815 | return 0; |
816 | |
817 | ERROR4: |
818 | sysfs_remove_group(kobj: &client->dev.kobj, grp: &asb100_group); |
819 | ERROR3: |
820 | i2c_unregister_device(client: data->lm75[1]); |
821 | i2c_unregister_device(client: data->lm75[0]); |
822 | return err; |
823 | } |
824 | |
825 | static void asb100_remove(struct i2c_client *client) |
826 | { |
827 | struct asb100_data *data = i2c_get_clientdata(client); |
828 | |
829 | hwmon_device_unregister(dev: data->hwmon_dev); |
830 | sysfs_remove_group(kobj: &client->dev.kobj, grp: &asb100_group); |
831 | |
832 | i2c_unregister_device(client: data->lm75[1]); |
833 | i2c_unregister_device(client: data->lm75[0]); |
834 | } |
835 | |
836 | /* |
837 | * The SMBus locks itself, usually, but nothing may access the chip between |
838 | * bank switches. |
839 | */ |
840 | static int asb100_read_value(struct i2c_client *client, u16 reg) |
841 | { |
842 | struct asb100_data *data = i2c_get_clientdata(client); |
843 | struct i2c_client *cl; |
844 | int res, bank; |
845 | |
846 | mutex_lock(&data->lock); |
847 | |
848 | bank = (reg >> 8) & 0x0f; |
849 | if (bank > 2) |
850 | /* switch banks */ |
851 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, value: bank); |
852 | |
853 | if (bank == 0 || bank > 2) { |
854 | res = i2c_smbus_read_byte_data(client, command: reg & 0xff); |
855 | } else { |
856 | /* switch to subclient */ |
857 | cl = data->lm75[bank - 1]; |
858 | |
859 | /* convert from ISA to LM75 I2C addresses */ |
860 | switch (reg & 0xff) { |
861 | case 0x50: /* TEMP */ |
862 | res = i2c_smbus_read_word_swapped(client: cl, command: 0); |
863 | break; |
864 | case 0x52: /* CONFIG */ |
865 | res = i2c_smbus_read_byte_data(client: cl, command: 1); |
866 | break; |
867 | case 0x53: /* HYST */ |
868 | res = i2c_smbus_read_word_swapped(client: cl, command: 2); |
869 | break; |
870 | case 0x55: /* MAX */ |
871 | default: |
872 | res = i2c_smbus_read_word_swapped(client: cl, command: 3); |
873 | break; |
874 | } |
875 | } |
876 | |
877 | if (bank > 2) |
878 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, value: 0); |
879 | |
880 | mutex_unlock(lock: &data->lock); |
881 | |
882 | return res; |
883 | } |
884 | |
885 | static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value) |
886 | { |
887 | struct asb100_data *data = i2c_get_clientdata(client); |
888 | struct i2c_client *cl; |
889 | int bank; |
890 | |
891 | mutex_lock(&data->lock); |
892 | |
893 | bank = (reg >> 8) & 0x0f; |
894 | if (bank > 2) |
895 | /* switch banks */ |
896 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, value: bank); |
897 | |
898 | if (bank == 0 || bank > 2) { |
899 | i2c_smbus_write_byte_data(client, command: reg & 0xff, value: value & 0xff); |
900 | } else { |
901 | /* switch to subclient */ |
902 | cl = data->lm75[bank - 1]; |
903 | |
904 | /* convert from ISA to LM75 I2C addresses */ |
905 | switch (reg & 0xff) { |
906 | case 0x52: /* CONFIG */ |
907 | i2c_smbus_write_byte_data(client: cl, command: 1, value: value & 0xff); |
908 | break; |
909 | case 0x53: /* HYST */ |
910 | i2c_smbus_write_word_swapped(client: cl, command: 2, value); |
911 | break; |
912 | case 0x55: /* MAX */ |
913 | i2c_smbus_write_word_swapped(client: cl, command: 3, value); |
914 | break; |
915 | } |
916 | } |
917 | |
918 | if (bank > 2) |
919 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, value: 0); |
920 | |
921 | mutex_unlock(lock: &data->lock); |
922 | } |
923 | |
924 | static void asb100_init_client(struct i2c_client *client) |
925 | { |
926 | struct asb100_data *data = i2c_get_clientdata(client); |
927 | |
928 | data->vrm = vid_which_vrm(); |
929 | |
930 | /* Start monitoring */ |
931 | asb100_write_value(client, ASB100_REG_CONFIG, |
932 | value: (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01); |
933 | } |
934 | |
935 | static struct asb100_data *asb100_update_device(struct device *dev) |
936 | { |
937 | struct i2c_client *client = to_i2c_client(dev); |
938 | struct asb100_data *data = i2c_get_clientdata(client); |
939 | int i; |
940 | |
941 | mutex_lock(&data->update_lock); |
942 | |
943 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
944 | || !data->valid) { |
945 | |
946 | dev_dbg(&client->dev, "starting device update...\n" ); |
947 | |
948 | /* 7 voltage inputs */ |
949 | for (i = 0; i < 7; i++) { |
950 | data->in[i] = asb100_read_value(client, |
951 | ASB100_REG_IN(i)); |
952 | data->in_min[i] = asb100_read_value(client, |
953 | ASB100_REG_IN_MIN(i)); |
954 | data->in_max[i] = asb100_read_value(client, |
955 | ASB100_REG_IN_MAX(i)); |
956 | } |
957 | |
958 | /* 3 fan inputs */ |
959 | for (i = 0; i < 3; i++) { |
960 | data->fan[i] = asb100_read_value(client, |
961 | ASB100_REG_FAN(i)); |
962 | data->fan_min[i] = asb100_read_value(client, |
963 | ASB100_REG_FAN_MIN(i)); |
964 | } |
965 | |
966 | /* 4 temperature inputs */ |
967 | for (i = 1; i <= 4; i++) { |
968 | data->temp[i-1] = asb100_read_value(client, |
969 | ASB100_REG_TEMP(i)); |
970 | data->temp_max[i-1] = asb100_read_value(client, |
971 | ASB100_REG_TEMP_MAX(i)); |
972 | data->temp_hyst[i-1] = asb100_read_value(client, |
973 | ASB100_REG_TEMP_HYST(i)); |
974 | } |
975 | |
976 | /* VID and fan divisors */ |
977 | i = asb100_read_value(client, ASB100_REG_VID_FANDIV); |
978 | data->vid = i & 0x0f; |
979 | data->vid |= (asb100_read_value(client, |
980 | ASB100_REG_CHIPID) & 0x01) << 4; |
981 | data->fan_div[0] = (i >> 4) & 0x03; |
982 | data->fan_div[1] = (i >> 6) & 0x03; |
983 | data->fan_div[2] = (asb100_read_value(client, |
984 | ASB100_REG_PIN) >> 6) & 0x03; |
985 | |
986 | /* PWM */ |
987 | data->pwm = asb100_read_value(client, ASB100_REG_PWM1); |
988 | |
989 | /* alarms */ |
990 | data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) + |
991 | (asb100_read_value(client, ASB100_REG_ALARM2) << 8); |
992 | |
993 | data->last_updated = jiffies; |
994 | data->valid = true; |
995 | |
996 | dev_dbg(&client->dev, "... device update complete\n" ); |
997 | } |
998 | |
999 | mutex_unlock(lock: &data->update_lock); |
1000 | |
1001 | return data; |
1002 | } |
1003 | |
1004 | module_i2c_driver(asb100_driver); |
1005 | |
1006 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>" ); |
1007 | MODULE_DESCRIPTION("ASB100 Bach driver" ); |
1008 | MODULE_LICENSE("GPL" ); |
1009 | |