1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * amc6821.c - Part of lm_sensors, Linux kernel modules for hardware |
4 | * monitoring |
5 | * Copyright (C) 2009 T. Mertelj <tomaz.mertelj@guest.arnes.si> |
6 | * |
7 | * Based on max6650.c: |
8 | * Copyright (C) 2007 Hans J. Koch <hjk@hansjkoch.de> |
9 | */ |
10 | |
11 | #include <linux/kernel.h> /* Needed for KERN_INFO */ |
12 | #include <linux/module.h> |
13 | #include <linux/init.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/jiffies.h> |
16 | #include <linux/i2c.h> |
17 | #include <linux/hwmon.h> |
18 | #include <linux/hwmon-sysfs.h> |
19 | #include <linux/err.h> |
20 | #include <linux/mutex.h> |
21 | |
22 | /* |
23 | * Addresses to scan. |
24 | */ |
25 | |
26 | static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, |
27 | 0x4c, 0x4d, 0x4e, I2C_CLIENT_END}; |
28 | |
29 | /* |
30 | * Insmod parameters |
31 | */ |
32 | |
33 | static int pwminv; /*Inverted PWM output. */ |
34 | module_param(pwminv, int, 0444); |
35 | |
36 | static int init = 1; /*Power-on initialization.*/ |
37 | module_param(init, int, 0444); |
38 | |
39 | enum chips { amc6821 }; |
40 | |
41 | #define AMC6821_REG_DEV_ID 0x3D |
42 | #define AMC6821_REG_COMP_ID 0x3E |
43 | #define AMC6821_REG_CONF1 0x00 |
44 | #define AMC6821_REG_CONF2 0x01 |
45 | #define AMC6821_REG_CONF3 0x3F |
46 | #define AMC6821_REG_CONF4 0x04 |
47 | #define AMC6821_REG_STAT1 0x02 |
48 | #define AMC6821_REG_STAT2 0x03 |
49 | #define AMC6821_REG_TDATA_LOW 0x08 |
50 | #define AMC6821_REG_TDATA_HI 0x09 |
51 | #define AMC6821_REG_LTEMP_HI 0x0A |
52 | #define AMC6821_REG_RTEMP_HI 0x0B |
53 | #define AMC6821_REG_LTEMP_LIMIT_MIN 0x15 |
54 | #define AMC6821_REG_LTEMP_LIMIT_MAX 0x14 |
55 | #define AMC6821_REG_RTEMP_LIMIT_MIN 0x19 |
56 | #define AMC6821_REG_RTEMP_LIMIT_MAX 0x18 |
57 | #define AMC6821_REG_LTEMP_CRIT 0x1B |
58 | #define AMC6821_REG_RTEMP_CRIT 0x1D |
59 | #define AMC6821_REG_PSV_TEMP 0x1C |
60 | #define AMC6821_REG_DCY 0x22 |
61 | #define AMC6821_REG_LTEMP_FAN_CTRL 0x24 |
62 | #define AMC6821_REG_RTEMP_FAN_CTRL 0x25 |
63 | #define AMC6821_REG_DCY_LOW_TEMP 0x21 |
64 | |
65 | #define AMC6821_REG_TACH_LLIMITL 0x10 |
66 | #define AMC6821_REG_TACH_LLIMITH 0x11 |
67 | #define AMC6821_REG_TACH_HLIMITL 0x12 |
68 | #define AMC6821_REG_TACH_HLIMITH 0x13 |
69 | |
70 | #define AMC6821_CONF1_START 0x01 |
71 | #define AMC6821_CONF1_FAN_INT_EN 0x02 |
72 | #define AMC6821_CONF1_FANIE 0x04 |
73 | #define AMC6821_CONF1_PWMINV 0x08 |
74 | #define AMC6821_CONF1_FAN_FAULT_EN 0x10 |
75 | #define AMC6821_CONF1_FDRC0 0x20 |
76 | #define AMC6821_CONF1_FDRC1 0x40 |
77 | #define AMC6821_CONF1_THERMOVIE 0x80 |
78 | |
79 | #define AMC6821_CONF2_PWM_EN 0x01 |
80 | #define AMC6821_CONF2_TACH_MODE 0x02 |
81 | #define AMC6821_CONF2_TACH_EN 0x04 |
82 | #define AMC6821_CONF2_RTFIE 0x08 |
83 | #define AMC6821_CONF2_LTOIE 0x10 |
84 | #define AMC6821_CONF2_RTOIE 0x20 |
85 | #define AMC6821_CONF2_PSVIE 0x40 |
86 | #define AMC6821_CONF2_RST 0x80 |
87 | |
88 | #define AMC6821_CONF3_THERM_FAN_EN 0x80 |
89 | #define AMC6821_CONF3_REV_MASK 0x0F |
90 | |
91 | #define AMC6821_CONF4_OVREN 0x10 |
92 | #define AMC6821_CONF4_TACH_FAST 0x20 |
93 | #define AMC6821_CONF4_PSPR 0x40 |
94 | #define AMC6821_CONF4_MODE 0x80 |
95 | |
96 | #define AMC6821_STAT1_RPM_ALARM 0x01 |
97 | #define AMC6821_STAT1_FANS 0x02 |
98 | #define AMC6821_STAT1_RTH 0x04 |
99 | #define AMC6821_STAT1_RTL 0x08 |
100 | #define AMC6821_STAT1_R_THERM 0x10 |
101 | #define AMC6821_STAT1_RTF 0x20 |
102 | #define AMC6821_STAT1_LTH 0x40 |
103 | #define AMC6821_STAT1_LTL 0x80 |
104 | |
105 | #define AMC6821_STAT2_RTC 0x08 |
106 | #define AMC6821_STAT2_LTC 0x10 |
107 | #define AMC6821_STAT2_LPSV 0x20 |
108 | #define AMC6821_STAT2_L_THERM 0x40 |
109 | #define AMC6821_STAT2_THERM_IN 0x80 |
110 | |
111 | enum {IDX_TEMP1_INPUT = 0, IDX_TEMP1_MIN, IDX_TEMP1_MAX, |
112 | IDX_TEMP1_CRIT, IDX_TEMP2_INPUT, IDX_TEMP2_MIN, |
113 | IDX_TEMP2_MAX, IDX_TEMP2_CRIT, |
114 | TEMP_IDX_LEN, }; |
115 | |
116 | static const u8 temp_reg[] = {AMC6821_REG_LTEMP_HI, |
117 | AMC6821_REG_LTEMP_LIMIT_MIN, |
118 | AMC6821_REG_LTEMP_LIMIT_MAX, |
119 | AMC6821_REG_LTEMP_CRIT, |
120 | AMC6821_REG_RTEMP_HI, |
121 | AMC6821_REG_RTEMP_LIMIT_MIN, |
122 | AMC6821_REG_RTEMP_LIMIT_MAX, |
123 | AMC6821_REG_RTEMP_CRIT, }; |
124 | |
125 | enum {IDX_FAN1_INPUT = 0, IDX_FAN1_MIN, IDX_FAN1_MAX, |
126 | FAN1_IDX_LEN, }; |
127 | |
128 | static const u8 fan_reg_low[] = {AMC6821_REG_TDATA_LOW, |
129 | AMC6821_REG_TACH_LLIMITL, |
130 | AMC6821_REG_TACH_HLIMITL, }; |
131 | |
132 | |
133 | static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI, |
134 | AMC6821_REG_TACH_LLIMITH, |
135 | AMC6821_REG_TACH_HLIMITH, }; |
136 | |
137 | /* |
138 | * Client data (each client gets its own) |
139 | */ |
140 | |
141 | struct amc6821_data { |
142 | struct i2c_client *client; |
143 | struct mutex update_lock; |
144 | bool valid; /* false until following fields are valid */ |
145 | unsigned long last_updated; /* in jiffies */ |
146 | |
147 | /* register values */ |
148 | int temp[TEMP_IDX_LEN]; |
149 | |
150 | u16 fan[FAN1_IDX_LEN]; |
151 | u8 fan1_div; |
152 | |
153 | u8 pwm1; |
154 | u8 temp1_auto_point_temp[3]; |
155 | u8 temp2_auto_point_temp[3]; |
156 | u8 pwm1_auto_point_pwm[3]; |
157 | u8 pwm1_enable; |
158 | u8 pwm1_auto_channels_temp; |
159 | |
160 | u8 stat1; |
161 | u8 stat2; |
162 | }; |
163 | |
164 | static struct amc6821_data *amc6821_update_device(struct device *dev) |
165 | { |
166 | struct amc6821_data *data = dev_get_drvdata(dev); |
167 | struct i2c_client *client = data->client; |
168 | int timeout = HZ; |
169 | u8 reg; |
170 | int i; |
171 | |
172 | mutex_lock(&data->update_lock); |
173 | |
174 | if (time_after(jiffies, data->last_updated + timeout) || |
175 | !data->valid) { |
176 | |
177 | for (i = 0; i < TEMP_IDX_LEN; i++) |
178 | data->temp[i] = (int8_t)i2c_smbus_read_byte_data( |
179 | client, command: temp_reg[i]); |
180 | |
181 | data->stat1 = i2c_smbus_read_byte_data(client, |
182 | AMC6821_REG_STAT1); |
183 | data->stat2 = i2c_smbus_read_byte_data(client, |
184 | AMC6821_REG_STAT2); |
185 | |
186 | data->pwm1 = i2c_smbus_read_byte_data(client, |
187 | AMC6821_REG_DCY); |
188 | for (i = 0; i < FAN1_IDX_LEN; i++) { |
189 | data->fan[i] = i2c_smbus_read_byte_data( |
190 | client, |
191 | command: fan_reg_low[i]); |
192 | data->fan[i] += i2c_smbus_read_byte_data( |
193 | client, |
194 | command: fan_reg_hi[i]) << 8; |
195 | } |
196 | data->fan1_div = i2c_smbus_read_byte_data(client, |
197 | AMC6821_REG_CONF4); |
198 | data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2; |
199 | |
200 | data->pwm1_auto_point_pwm[0] = 0; |
201 | data->pwm1_auto_point_pwm[2] = 255; |
202 | data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client, |
203 | AMC6821_REG_DCY_LOW_TEMP); |
204 | |
205 | data->temp1_auto_point_temp[0] = |
206 | i2c_smbus_read_byte_data(client, |
207 | AMC6821_REG_PSV_TEMP); |
208 | data->temp2_auto_point_temp[0] = |
209 | data->temp1_auto_point_temp[0]; |
210 | reg = i2c_smbus_read_byte_data(client, |
211 | AMC6821_REG_LTEMP_FAN_CTRL); |
212 | data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1; |
213 | reg &= 0x07; |
214 | reg = 0x20 >> reg; |
215 | if (reg > 0) |
216 | data->temp1_auto_point_temp[2] = |
217 | data->temp1_auto_point_temp[1] + |
218 | (data->pwm1_auto_point_pwm[2] - |
219 | data->pwm1_auto_point_pwm[1]) / reg; |
220 | else |
221 | data->temp1_auto_point_temp[2] = 255; |
222 | |
223 | reg = i2c_smbus_read_byte_data(client, |
224 | AMC6821_REG_RTEMP_FAN_CTRL); |
225 | data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1; |
226 | reg &= 0x07; |
227 | reg = 0x20 >> reg; |
228 | if (reg > 0) |
229 | data->temp2_auto_point_temp[2] = |
230 | data->temp2_auto_point_temp[1] + |
231 | (data->pwm1_auto_point_pwm[2] - |
232 | data->pwm1_auto_point_pwm[1]) / reg; |
233 | else |
234 | data->temp2_auto_point_temp[2] = 255; |
235 | |
236 | reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); |
237 | reg = (reg >> 5) & 0x3; |
238 | switch (reg) { |
239 | case 0: /*open loop: software sets pwm1*/ |
240 | data->pwm1_auto_channels_temp = 0; |
241 | data->pwm1_enable = 1; |
242 | break; |
243 | case 2: /*closed loop: remote T (temp2)*/ |
244 | data->pwm1_auto_channels_temp = 2; |
245 | data->pwm1_enable = 2; |
246 | break; |
247 | case 3: /*closed loop: local and remote T (temp2)*/ |
248 | data->pwm1_auto_channels_temp = 3; |
249 | data->pwm1_enable = 3; |
250 | break; |
251 | case 1: /* |
252 | * semi-open loop: software sets rpm, chip controls |
253 | * pwm1, currently not implemented |
254 | */ |
255 | data->pwm1_auto_channels_temp = 0; |
256 | data->pwm1_enable = 0; |
257 | break; |
258 | } |
259 | |
260 | data->last_updated = jiffies; |
261 | data->valid = true; |
262 | } |
263 | mutex_unlock(lock: &data->update_lock); |
264 | return data; |
265 | } |
266 | |
267 | static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, |
268 | char *buf) |
269 | { |
270 | struct amc6821_data *data = amc6821_update_device(dev); |
271 | int ix = to_sensor_dev_attr(devattr)->index; |
272 | |
273 | return sprintf(buf, fmt: "%d\n" , data->temp[ix] * 1000); |
274 | } |
275 | |
276 | static ssize_t temp_store(struct device *dev, struct device_attribute *attr, |
277 | const char *buf, size_t count) |
278 | { |
279 | struct amc6821_data *data = dev_get_drvdata(dev); |
280 | struct i2c_client *client = data->client; |
281 | int ix = to_sensor_dev_attr(attr)->index; |
282 | long val; |
283 | |
284 | int ret = kstrtol(s: buf, base: 10, res: &val); |
285 | if (ret) |
286 | return ret; |
287 | val = clamp_val(val / 1000, -128, 127); |
288 | |
289 | mutex_lock(&data->update_lock); |
290 | data->temp[ix] = val; |
291 | if (i2c_smbus_write_byte_data(client, command: temp_reg[ix], value: data->temp[ix])) { |
292 | dev_err(&client->dev, "Register write error, aborting.\n" ); |
293 | count = -EIO; |
294 | } |
295 | mutex_unlock(lock: &data->update_lock); |
296 | return count; |
297 | } |
298 | |
299 | static ssize_t temp_alarm_show(struct device *dev, |
300 | struct device_attribute *devattr, char *buf) |
301 | { |
302 | struct amc6821_data *data = amc6821_update_device(dev); |
303 | int ix = to_sensor_dev_attr(devattr)->index; |
304 | u8 flag; |
305 | |
306 | switch (ix) { |
307 | case IDX_TEMP1_MIN: |
308 | flag = data->stat1 & AMC6821_STAT1_LTL; |
309 | break; |
310 | case IDX_TEMP1_MAX: |
311 | flag = data->stat1 & AMC6821_STAT1_LTH; |
312 | break; |
313 | case IDX_TEMP1_CRIT: |
314 | flag = data->stat2 & AMC6821_STAT2_LTC; |
315 | break; |
316 | case IDX_TEMP2_MIN: |
317 | flag = data->stat1 & AMC6821_STAT1_RTL; |
318 | break; |
319 | case IDX_TEMP2_MAX: |
320 | flag = data->stat1 & AMC6821_STAT1_RTH; |
321 | break; |
322 | case IDX_TEMP2_CRIT: |
323 | flag = data->stat2 & AMC6821_STAT2_RTC; |
324 | break; |
325 | default: |
326 | dev_dbg(dev, "Unknown attr->index (%d).\n" , ix); |
327 | return -EINVAL; |
328 | } |
329 | if (flag) |
330 | return sprintf(buf, fmt: "1" ); |
331 | else |
332 | return sprintf(buf, fmt: "0" ); |
333 | } |
334 | |
335 | static ssize_t temp2_fault_show(struct device *dev, |
336 | struct device_attribute *devattr, char *buf) |
337 | { |
338 | struct amc6821_data *data = amc6821_update_device(dev); |
339 | if (data->stat1 & AMC6821_STAT1_RTF) |
340 | return sprintf(buf, fmt: "1" ); |
341 | else |
342 | return sprintf(buf, fmt: "0" ); |
343 | } |
344 | |
345 | static ssize_t pwm1_show(struct device *dev, struct device_attribute *devattr, |
346 | char *buf) |
347 | { |
348 | struct amc6821_data *data = amc6821_update_device(dev); |
349 | return sprintf(buf, fmt: "%d\n" , data->pwm1); |
350 | } |
351 | |
352 | static ssize_t pwm1_store(struct device *dev, |
353 | struct device_attribute *devattr, const char *buf, |
354 | size_t count) |
355 | { |
356 | struct amc6821_data *data = dev_get_drvdata(dev); |
357 | struct i2c_client *client = data->client; |
358 | long val; |
359 | int ret = kstrtol(s: buf, base: 10, res: &val); |
360 | if (ret) |
361 | return ret; |
362 | |
363 | mutex_lock(&data->update_lock); |
364 | data->pwm1 = clamp_val(val , 0, 255); |
365 | i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, value: data->pwm1); |
366 | mutex_unlock(lock: &data->update_lock); |
367 | return count; |
368 | } |
369 | |
370 | static ssize_t pwm1_enable_show(struct device *dev, |
371 | struct device_attribute *devattr, char *buf) |
372 | { |
373 | struct amc6821_data *data = amc6821_update_device(dev); |
374 | return sprintf(buf, fmt: "%d\n" , data->pwm1_enable); |
375 | } |
376 | |
377 | static ssize_t pwm1_enable_store(struct device *dev, |
378 | struct device_attribute *attr, |
379 | const char *buf, size_t count) |
380 | { |
381 | struct amc6821_data *data = dev_get_drvdata(dev); |
382 | struct i2c_client *client = data->client; |
383 | long val; |
384 | int config = kstrtol(s: buf, base: 10, res: &val); |
385 | if (config) |
386 | return config; |
387 | |
388 | mutex_lock(&data->update_lock); |
389 | config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); |
390 | if (config < 0) { |
391 | dev_err(&client->dev, |
392 | "Error reading configuration register, aborting.\n" ); |
393 | count = config; |
394 | goto unlock; |
395 | } |
396 | |
397 | switch (val) { |
398 | case 1: |
399 | config &= ~AMC6821_CONF1_FDRC0; |
400 | config &= ~AMC6821_CONF1_FDRC1; |
401 | break; |
402 | case 2: |
403 | config &= ~AMC6821_CONF1_FDRC0; |
404 | config |= AMC6821_CONF1_FDRC1; |
405 | break; |
406 | case 3: |
407 | config |= AMC6821_CONF1_FDRC0; |
408 | config |= AMC6821_CONF1_FDRC1; |
409 | break; |
410 | default: |
411 | count = -EINVAL; |
412 | goto unlock; |
413 | } |
414 | if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, value: config)) { |
415 | dev_err(&client->dev, |
416 | "Configuration register write error, aborting.\n" ); |
417 | count = -EIO; |
418 | } |
419 | unlock: |
420 | mutex_unlock(lock: &data->update_lock); |
421 | return count; |
422 | } |
423 | |
424 | static ssize_t pwm1_auto_channels_temp_show(struct device *dev, |
425 | struct device_attribute *devattr, |
426 | char *buf) |
427 | { |
428 | struct amc6821_data *data = amc6821_update_device(dev); |
429 | return sprintf(buf, fmt: "%d\n" , data->pwm1_auto_channels_temp); |
430 | } |
431 | |
432 | static ssize_t temp_auto_point_temp_show(struct device *dev, |
433 | struct device_attribute *devattr, |
434 | char *buf) |
435 | { |
436 | int ix = to_sensor_dev_attr_2(devattr)->index; |
437 | int nr = to_sensor_dev_attr_2(devattr)->nr; |
438 | struct amc6821_data *data = amc6821_update_device(dev); |
439 | switch (nr) { |
440 | case 1: |
441 | return sprintf(buf, fmt: "%d\n" , |
442 | data->temp1_auto_point_temp[ix] * 1000); |
443 | case 2: |
444 | return sprintf(buf, fmt: "%d\n" , |
445 | data->temp2_auto_point_temp[ix] * 1000); |
446 | default: |
447 | dev_dbg(dev, "Unknown attr->nr (%d).\n" , nr); |
448 | return -EINVAL; |
449 | } |
450 | } |
451 | |
452 | static ssize_t pwm1_auto_point_pwm_show(struct device *dev, |
453 | struct device_attribute *devattr, |
454 | char *buf) |
455 | { |
456 | int ix = to_sensor_dev_attr(devattr)->index; |
457 | struct amc6821_data *data = amc6821_update_device(dev); |
458 | return sprintf(buf, fmt: "%d\n" , data->pwm1_auto_point_pwm[ix]); |
459 | } |
460 | |
461 | static inline ssize_t set_slope_register(struct i2c_client *client, |
462 | u8 reg, |
463 | u8 dpwm, |
464 | u8 *ptemp) |
465 | { |
466 | int dt; |
467 | u8 tmp; |
468 | |
469 | dt = ptemp[2]-ptemp[1]; |
470 | for (tmp = 4; tmp > 0; tmp--) { |
471 | if (dt * (0x20 >> tmp) >= dpwm) |
472 | break; |
473 | } |
474 | tmp |= (ptemp[1] & 0x7C) << 1; |
475 | if (i2c_smbus_write_byte_data(client, |
476 | command: reg, value: tmp)) { |
477 | dev_err(&client->dev, "Register write error, aborting.\n" ); |
478 | return -EIO; |
479 | } |
480 | return 0; |
481 | } |
482 | |
483 | static ssize_t temp_auto_point_temp_store(struct device *dev, |
484 | struct device_attribute *attr, |
485 | const char *buf, size_t count) |
486 | { |
487 | struct amc6821_data *data = amc6821_update_device(dev); |
488 | struct i2c_client *client = data->client; |
489 | int ix = to_sensor_dev_attr_2(attr)->index; |
490 | int nr = to_sensor_dev_attr_2(attr)->nr; |
491 | u8 *ptemp; |
492 | u8 reg; |
493 | int dpwm; |
494 | long val; |
495 | int ret = kstrtol(s: buf, base: 10, res: &val); |
496 | if (ret) |
497 | return ret; |
498 | |
499 | switch (nr) { |
500 | case 1: |
501 | ptemp = data->temp1_auto_point_temp; |
502 | reg = AMC6821_REG_LTEMP_FAN_CTRL; |
503 | break; |
504 | case 2: |
505 | ptemp = data->temp2_auto_point_temp; |
506 | reg = AMC6821_REG_RTEMP_FAN_CTRL; |
507 | break; |
508 | default: |
509 | dev_dbg(dev, "Unknown attr->nr (%d).\n" , nr); |
510 | return -EINVAL; |
511 | } |
512 | |
513 | mutex_lock(&data->update_lock); |
514 | data->valid = false; |
515 | |
516 | switch (ix) { |
517 | case 0: |
518 | ptemp[0] = clamp_val(val / 1000, 0, |
519 | data->temp1_auto_point_temp[1]); |
520 | ptemp[0] = clamp_val(ptemp[0], 0, |
521 | data->temp2_auto_point_temp[1]); |
522 | ptemp[0] = clamp_val(ptemp[0], 0, 63); |
523 | if (i2c_smbus_write_byte_data( |
524 | client, |
525 | AMC6821_REG_PSV_TEMP, |
526 | value: ptemp[0])) { |
527 | dev_err(&client->dev, |
528 | "Register write error, aborting.\n" ); |
529 | count = -EIO; |
530 | } |
531 | goto EXIT; |
532 | case 1: |
533 | ptemp[1] = clamp_val(val / 1000, (ptemp[0] & 0x7C) + 4, 124); |
534 | ptemp[1] &= 0x7C; |
535 | ptemp[2] = clamp_val(ptemp[2], ptemp[1] + 1, 255); |
536 | break; |
537 | case 2: |
538 | ptemp[2] = clamp_val(val / 1000, ptemp[1]+1, 255); |
539 | break; |
540 | default: |
541 | dev_dbg(dev, "Unknown attr->index (%d).\n" , ix); |
542 | count = -EINVAL; |
543 | goto EXIT; |
544 | } |
545 | dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; |
546 | if (set_slope_register(client, reg, dpwm, ptemp)) |
547 | count = -EIO; |
548 | |
549 | EXIT: |
550 | mutex_unlock(lock: &data->update_lock); |
551 | return count; |
552 | } |
553 | |
554 | static ssize_t pwm1_auto_point_pwm_store(struct device *dev, |
555 | struct device_attribute *attr, |
556 | const char *buf, size_t count) |
557 | { |
558 | struct amc6821_data *data = dev_get_drvdata(dev); |
559 | struct i2c_client *client = data->client; |
560 | int dpwm; |
561 | long val; |
562 | int ret = kstrtol(s: buf, base: 10, res: &val); |
563 | if (ret) |
564 | return ret; |
565 | |
566 | mutex_lock(&data->update_lock); |
567 | data->pwm1_auto_point_pwm[1] = clamp_val(val, 0, 254); |
568 | if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP, |
569 | value: data->pwm1_auto_point_pwm[1])) { |
570 | dev_err(&client->dev, "Register write error, aborting.\n" ); |
571 | count = -EIO; |
572 | goto EXIT; |
573 | } |
574 | dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1]; |
575 | if (set_slope_register(client, AMC6821_REG_LTEMP_FAN_CTRL, dpwm, |
576 | ptemp: data->temp1_auto_point_temp)) { |
577 | count = -EIO; |
578 | goto EXIT; |
579 | } |
580 | if (set_slope_register(client, AMC6821_REG_RTEMP_FAN_CTRL, dpwm, |
581 | ptemp: data->temp2_auto_point_temp)) { |
582 | count = -EIO; |
583 | goto EXIT; |
584 | } |
585 | |
586 | EXIT: |
587 | data->valid = false; |
588 | mutex_unlock(lock: &data->update_lock); |
589 | return count; |
590 | } |
591 | |
592 | static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, |
593 | char *buf) |
594 | { |
595 | struct amc6821_data *data = amc6821_update_device(dev); |
596 | int ix = to_sensor_dev_attr(devattr)->index; |
597 | if (0 == data->fan[ix]) |
598 | return sprintf(buf, fmt: "0" ); |
599 | return sprintf(buf, fmt: "%d\n" , (int)(6000000 / data->fan[ix])); |
600 | } |
601 | |
602 | static ssize_t fan1_fault_show(struct device *dev, |
603 | struct device_attribute *devattr, char *buf) |
604 | { |
605 | struct amc6821_data *data = amc6821_update_device(dev); |
606 | if (data->stat1 & AMC6821_STAT1_FANS) |
607 | return sprintf(buf, fmt: "1" ); |
608 | else |
609 | return sprintf(buf, fmt: "0" ); |
610 | } |
611 | |
612 | static ssize_t fan_store(struct device *dev, struct device_attribute *attr, |
613 | const char *buf, size_t count) |
614 | { |
615 | struct amc6821_data *data = dev_get_drvdata(dev); |
616 | struct i2c_client *client = data->client; |
617 | long val; |
618 | int ix = to_sensor_dev_attr(attr)->index; |
619 | int ret = kstrtol(s: buf, base: 10, res: &val); |
620 | if (ret) |
621 | return ret; |
622 | val = 1 > val ? 0xFFFF : 6000000/val; |
623 | |
624 | mutex_lock(&data->update_lock); |
625 | data->fan[ix] = (u16) clamp_val(val, 1, 0xFFFF); |
626 | if (i2c_smbus_write_byte_data(client, command: fan_reg_low[ix], |
627 | value: data->fan[ix] & 0xFF)) { |
628 | dev_err(&client->dev, "Register write error, aborting.\n" ); |
629 | count = -EIO; |
630 | goto EXIT; |
631 | } |
632 | if (i2c_smbus_write_byte_data(client, |
633 | command: fan_reg_hi[ix], value: data->fan[ix] >> 8)) { |
634 | dev_err(&client->dev, "Register write error, aborting.\n" ); |
635 | count = -EIO; |
636 | } |
637 | EXIT: |
638 | mutex_unlock(lock: &data->update_lock); |
639 | return count; |
640 | } |
641 | |
642 | static ssize_t fan1_div_show(struct device *dev, |
643 | struct device_attribute *devattr, char *buf) |
644 | { |
645 | struct amc6821_data *data = amc6821_update_device(dev); |
646 | return sprintf(buf, fmt: "%d\n" , data->fan1_div); |
647 | } |
648 | |
649 | static ssize_t fan1_div_store(struct device *dev, |
650 | struct device_attribute *attr, const char *buf, |
651 | size_t count) |
652 | { |
653 | struct amc6821_data *data = dev_get_drvdata(dev); |
654 | struct i2c_client *client = data->client; |
655 | long val; |
656 | int config = kstrtol(s: buf, base: 10, res: &val); |
657 | if (config) |
658 | return config; |
659 | |
660 | mutex_lock(&data->update_lock); |
661 | config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); |
662 | if (config < 0) { |
663 | dev_err(&client->dev, |
664 | "Error reading configuration register, aborting.\n" ); |
665 | count = config; |
666 | goto EXIT; |
667 | } |
668 | switch (val) { |
669 | case 2: |
670 | config &= ~AMC6821_CONF4_PSPR; |
671 | data->fan1_div = 2; |
672 | break; |
673 | case 4: |
674 | config |= AMC6821_CONF4_PSPR; |
675 | data->fan1_div = 4; |
676 | break; |
677 | default: |
678 | count = -EINVAL; |
679 | goto EXIT; |
680 | } |
681 | if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, value: config)) { |
682 | dev_err(&client->dev, |
683 | "Configuration register write error, aborting.\n" ); |
684 | count = -EIO; |
685 | } |
686 | EXIT: |
687 | mutex_unlock(lock: &data->update_lock); |
688 | return count; |
689 | } |
690 | |
691 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, IDX_TEMP1_INPUT); |
692 | static SENSOR_DEVICE_ATTR_RW(temp1_min, temp, IDX_TEMP1_MIN); |
693 | static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, IDX_TEMP1_MAX); |
694 | static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp, IDX_TEMP1_CRIT); |
695 | static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_alarm, IDX_TEMP1_MIN); |
696 | static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_alarm, IDX_TEMP1_MAX); |
697 | static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, temp_alarm, IDX_TEMP1_CRIT); |
698 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, IDX_TEMP2_INPUT); |
699 | static SENSOR_DEVICE_ATTR_RW(temp2_min, temp, IDX_TEMP2_MIN); |
700 | static SENSOR_DEVICE_ATTR_RW(temp2_max, temp, IDX_TEMP2_MAX); |
701 | static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp, IDX_TEMP2_CRIT); |
702 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp2_fault, 0); |
703 | static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_alarm, IDX_TEMP2_MIN); |
704 | static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_alarm, IDX_TEMP2_MAX); |
705 | static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, temp_alarm, IDX_TEMP2_CRIT); |
706 | static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, IDX_FAN1_INPUT); |
707 | static SENSOR_DEVICE_ATTR_RW(fan1_min, fan, IDX_FAN1_MIN); |
708 | static SENSOR_DEVICE_ATTR_RW(fan1_max, fan, IDX_FAN1_MAX); |
709 | static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan1_fault, 0); |
710 | static SENSOR_DEVICE_ATTR_RW(fan1_div, fan1_div, 0); |
711 | |
712 | static SENSOR_DEVICE_ATTR_RW(pwm1, pwm1, 0); |
713 | static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm1_enable, 0); |
714 | static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point1_pwm, pwm1_auto_point_pwm, 0); |
715 | static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm1_auto_point_pwm, 1); |
716 | static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point3_pwm, pwm1_auto_point_pwm, 2); |
717 | static SENSOR_DEVICE_ATTR_RO(pwm1_auto_channels_temp, pwm1_auto_channels_temp, |
718 | 0); |
719 | static SENSOR_DEVICE_ATTR_2_RO(temp1_auto_point1_temp, temp_auto_point_temp, |
720 | 1, 0); |
721 | static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, temp_auto_point_temp, |
722 | 1, 1); |
723 | static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point3_temp, temp_auto_point_temp, |
724 | 1, 2); |
725 | |
726 | static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp_auto_point_temp, |
727 | 2, 0); |
728 | static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, temp_auto_point_temp, |
729 | 2, 1); |
730 | static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point3_temp, temp_auto_point_temp, |
731 | 2, 2); |
732 | |
733 | static struct attribute *amc6821_attrs[] = { |
734 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
735 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
736 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
737 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
738 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, |
739 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, |
740 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, |
741 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
742 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
743 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
744 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
745 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
746 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, |
747 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, |
748 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
749 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
750 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
751 | &sensor_dev_attr_fan1_max.dev_attr.attr, |
752 | &sensor_dev_attr_fan1_fault.dev_attr.attr, |
753 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
754 | &sensor_dev_attr_pwm1.dev_attr.attr, |
755 | &sensor_dev_attr_pwm1_enable.dev_attr.attr, |
756 | &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, |
757 | &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, |
758 | &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, |
759 | &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, |
760 | &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, |
761 | &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, |
762 | &sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr, |
763 | &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr, |
764 | &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, |
765 | &sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr, |
766 | NULL |
767 | }; |
768 | |
769 | ATTRIBUTE_GROUPS(amc6821); |
770 | |
771 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
772 | static int amc6821_detect( |
773 | struct i2c_client *client, |
774 | struct i2c_board_info *info) |
775 | { |
776 | struct i2c_adapter *adapter = client->adapter; |
777 | int address = client->addr; |
778 | int dev_id, comp_id; |
779 | |
780 | dev_dbg(&adapter->dev, "amc6821_detect called.\n" ); |
781 | |
782 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
783 | dev_dbg(&adapter->dev, |
784 | "amc6821: I2C bus doesn't support byte mode, " |
785 | "skipping.\n" ); |
786 | return -ENODEV; |
787 | } |
788 | |
789 | dev_id = i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID); |
790 | comp_id = i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID); |
791 | if (dev_id != 0x21 || comp_id != 0x49) { |
792 | dev_dbg(&adapter->dev, |
793 | "amc6821: detection failed at 0x%02x.\n" , |
794 | address); |
795 | return -ENODEV; |
796 | } |
797 | |
798 | /* |
799 | * Bit 7 of the address register is ignored, so we can check the |
800 | * ID registers again |
801 | */ |
802 | dev_id = i2c_smbus_read_byte_data(client, command: 0x80 | AMC6821_REG_DEV_ID); |
803 | comp_id = i2c_smbus_read_byte_data(client, command: 0x80 | AMC6821_REG_COMP_ID); |
804 | if (dev_id != 0x21 || comp_id != 0x49) { |
805 | dev_dbg(&adapter->dev, |
806 | "amc6821: detection failed at 0x%02x.\n" , |
807 | address); |
808 | return -ENODEV; |
809 | } |
810 | |
811 | dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n" , address); |
812 | strscpy(p: info->type, q: "amc6821" , I2C_NAME_SIZE); |
813 | |
814 | return 0; |
815 | } |
816 | |
817 | static int amc6821_init_client(struct i2c_client *client) |
818 | { |
819 | int config; |
820 | int err = -EIO; |
821 | |
822 | if (init) { |
823 | config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); |
824 | |
825 | if (config < 0) { |
826 | dev_err(&client->dev, |
827 | "Error reading configuration register, aborting.\n" ); |
828 | return err; |
829 | } |
830 | |
831 | config |= AMC6821_CONF4_MODE; |
832 | |
833 | if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, |
834 | value: config)) { |
835 | dev_err(&client->dev, |
836 | "Configuration register write error, aborting.\n" ); |
837 | return err; |
838 | } |
839 | |
840 | config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3); |
841 | |
842 | if (config < 0) { |
843 | dev_err(&client->dev, |
844 | "Error reading configuration register, aborting.\n" ); |
845 | return err; |
846 | } |
847 | |
848 | dev_info(&client->dev, "Revision %d\n" , config & 0x0f); |
849 | |
850 | config &= ~AMC6821_CONF3_THERM_FAN_EN; |
851 | |
852 | if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3, |
853 | value: config)) { |
854 | dev_err(&client->dev, |
855 | "Configuration register write error, aborting.\n" ); |
856 | return err; |
857 | } |
858 | |
859 | config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2); |
860 | |
861 | if (config < 0) { |
862 | dev_err(&client->dev, |
863 | "Error reading configuration register, aborting.\n" ); |
864 | return err; |
865 | } |
866 | |
867 | config &= ~AMC6821_CONF2_RTFIE; |
868 | config &= ~AMC6821_CONF2_LTOIE; |
869 | config &= ~AMC6821_CONF2_RTOIE; |
870 | if (i2c_smbus_write_byte_data(client, |
871 | AMC6821_REG_CONF2, value: config)) { |
872 | dev_err(&client->dev, |
873 | "Configuration register write error, aborting.\n" ); |
874 | return err; |
875 | } |
876 | |
877 | config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); |
878 | |
879 | if (config < 0) { |
880 | dev_err(&client->dev, |
881 | "Error reading configuration register, aborting.\n" ); |
882 | return err; |
883 | } |
884 | |
885 | config &= ~AMC6821_CONF1_THERMOVIE; |
886 | config &= ~AMC6821_CONF1_FANIE; |
887 | config |= AMC6821_CONF1_START; |
888 | if (pwminv) |
889 | config |= AMC6821_CONF1_PWMINV; |
890 | else |
891 | config &= ~AMC6821_CONF1_PWMINV; |
892 | |
893 | if (i2c_smbus_write_byte_data( |
894 | client, AMC6821_REG_CONF1, value: config)) { |
895 | dev_err(&client->dev, |
896 | "Configuration register write error, aborting.\n" ); |
897 | return err; |
898 | } |
899 | } |
900 | return 0; |
901 | } |
902 | |
903 | static int amc6821_probe(struct i2c_client *client) |
904 | { |
905 | struct device *dev = &client->dev; |
906 | struct amc6821_data *data; |
907 | struct device *hwmon_dev; |
908 | int err; |
909 | |
910 | data = devm_kzalloc(dev, size: sizeof(struct amc6821_data), GFP_KERNEL); |
911 | if (!data) |
912 | return -ENOMEM; |
913 | |
914 | data->client = client; |
915 | mutex_init(&data->update_lock); |
916 | |
917 | /* |
918 | * Initialize the amc6821 chip |
919 | */ |
920 | err = amc6821_init_client(client); |
921 | if (err) |
922 | return err; |
923 | |
924 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, name: client->name, |
925 | drvdata: data, |
926 | groups: amc6821_groups); |
927 | return PTR_ERR_OR_ZERO(ptr: hwmon_dev); |
928 | } |
929 | |
930 | static const struct i2c_device_id amc6821_id[] = { |
931 | { "amc6821" , amc6821 }, |
932 | { } |
933 | }; |
934 | |
935 | MODULE_DEVICE_TABLE(i2c, amc6821_id); |
936 | |
937 | static struct i2c_driver amc6821_driver = { |
938 | .class = I2C_CLASS_HWMON, |
939 | .driver = { |
940 | .name = "amc6821" , |
941 | }, |
942 | .probe = amc6821_probe, |
943 | .id_table = amc6821_id, |
944 | .detect = amc6821_detect, |
945 | .address_list = normal_i2c, |
946 | }; |
947 | |
948 | module_i2c_driver(amc6821_driver); |
949 | |
950 | MODULE_LICENSE("GPL" ); |
951 | MODULE_AUTHOR("T. Mertelj <tomaz.mertelj@guest.arnes.si>" ); |
952 | MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver" ); |
953 | |