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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, | |
59 | "List of subclient addresses: {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 cpu0_vid_show(struct device *dev, | |
487 | struct device_attribute *attr, 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_RO(cpu0_vid); | |
494 | ||
495 | /* VRM */ | |
496 | static ssize_t vrm_show(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 vrm_store(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 | ||
514 | if (val > 255) | |
515 | return -EINVAL; | |
516 | ||
517 | data->vrm = val; | |
518 | return count; | |
519 | } | |
520 | ||
521 | /* Alarms */ | |
522 | static DEVICE_ATTR_RW(vrm); | |
523 | ||
524 | static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, | |
525 | char *buf) | |
526 | { | |
527 | struct asb100_data *data = asb100_update_device(dev); | |
528 | return sprintf(buf, "%u\n", data->alarms); | |
529 | } | |
530 | ||
531 | static DEVICE_ATTR_RO(alarms); | |
532 | ||
533 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, | |
534 | char *buf) | |
535 | { | |
536 | int bitnr = to_sensor_dev_attr(attr)->index; | |
537 | struct asb100_data *data = asb100_update_device(dev); | |
538 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
539 | } | |
540 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
541 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
542 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
543 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
544 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
545 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
546 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
547 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
548 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
549 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); | |
550 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13); | |
551 | ||
552 | /* 1 PWM */ | |
553 | static ssize_t pwm1_show(struct device *dev, struct device_attribute *attr, | |
554 | char *buf) | |
555 | { | |
556 | struct asb100_data *data = asb100_update_device(dev); | |
557 | return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f)); | |
558 | } | |
559 | ||
560 | static ssize_t pwm1_store(struct device *dev, struct device_attribute *attr, | |
561 | const char *buf, size_t count) | |
562 | { | |
563 | struct i2c_client *client = to_i2c_client(dev); | |
564 | struct asb100_data *data = i2c_get_clientdata(client); | |
565 | unsigned long val; | |
566 | int err; | |
567 | ||
568 | err = kstrtoul(buf, 10, &val); | |
569 | if (err) | |
570 | return err; | |
571 | ||
572 | mutex_lock(&data->update_lock); | |
573 | data->pwm &= 0x80; /* keep the enable bit */ | |
574 | data->pwm |= (0x0f & ASB100_PWM_TO_REG(val)); | |
575 | asb100_write_value(client, ASB100_REG_PWM1, data->pwm); | |
576 | mutex_unlock(&data->update_lock); | |
577 | return count; | |
578 | } | |
579 | ||
580 | static ssize_t pwm1_enable_show(struct device *dev, | |
581 | struct device_attribute *attr, char *buf) | |
582 | { | |
583 | struct asb100_data *data = asb100_update_device(dev); | |
584 | return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0); | |
585 | } | |
586 | ||
587 | static ssize_t pwm1_enable_store(struct device *dev, | |
588 | struct device_attribute *attr, | |
589 | const char *buf, size_t count) | |
590 | { | |
591 | struct i2c_client *client = to_i2c_client(dev); | |
592 | struct asb100_data *data = i2c_get_clientdata(client); | |
593 | unsigned long val; | |
594 | int err; | |
595 | ||
596 | err = kstrtoul(buf, 10, &val); | |
597 | if (err) | |
598 | return err; | |
599 | ||
600 | mutex_lock(&data->update_lock); | |
601 | data->pwm &= 0x0f; /* keep the duty cycle bits */ | |
602 | data->pwm |= (val ? 0x80 : 0x00); | |
603 | asb100_write_value(client, ASB100_REG_PWM1, data->pwm); | |
604 | mutex_unlock(&data->update_lock); | |
605 | return count; | |
606 | } | |
607 | ||
608 | static DEVICE_ATTR_RW(pwm1); | |
609 | static DEVICE_ATTR_RW(pwm1_enable); | |
610 | ||
611 | static struct attribute *asb100_attributes[] = { | |
612 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
613 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
614 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
615 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
616 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
617 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
618 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
619 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
620 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
621 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
622 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
623 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
624 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
625 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
626 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
627 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
628 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
629 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
630 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
631 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
632 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
633 | ||
634 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
635 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
636 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
637 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
638 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
639 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
640 | &sensor_dev_attr_fan3_input.dev_attr.attr, | |
641 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
642 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
643 | ||
644 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
645 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
646 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
647 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
648 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
649 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, | |
650 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
651 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
652 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, | |
653 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
654 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
655 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, | |
656 | ||
657 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
658 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
659 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
660 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
661 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
662 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, | |
663 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, | |
664 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, | |
665 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, | |
666 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
667 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, | |
668 | ||
669 | &dev_attr_cpu0_vid.attr, | |
670 | &dev_attr_vrm.attr, | |
671 | &dev_attr_alarms.attr, | |
672 | &dev_attr_pwm1.attr, | |
673 | &dev_attr_pwm1_enable.attr, | |
674 | ||
675 | NULL | |
676 | }; | |
677 | ||
678 | static const struct attribute_group asb100_group = { | |
679 | .attrs = asb100_attributes, | |
680 | }; | |
681 | ||
682 | static int asb100_detect_subclients(struct i2c_client *client) | |
683 | { | |
684 | int i, id, err; | |
685 | int address = client->addr; | |
686 | unsigned short sc_addr[2]; | |
687 | struct asb100_data *data = i2c_get_clientdata(client); | |
688 | struct i2c_adapter *adapter = client->adapter; | |
689 | ||
690 | id = i2c_adapter_id(adapter); | |
691 | ||
692 | if (force_subclients[0] == id && force_subclients[1] == address) { | |
693 | for (i = 2; i <= 3; i++) { | |
694 | if (force_subclients[i] < 0x48 || | |
695 | force_subclients[i] > 0x4f) { | |
696 | dev_err(&client->dev, | |
697 | "invalid subclient address %d; must be 0x48-0x4f\n", | |
698 | force_subclients[i]); | |
699 | err = -ENODEV; | |
700 | goto ERROR_SC_2; | |
701 | } | |
702 | } | |
703 | asb100_write_value(client, ASB100_REG_I2C_SUBADDR, | |
704 | (force_subclients[2] & 0x07) | | |
705 | ((force_subclients[3] & 0x07) << 4)); | |
706 | sc_addr[0] = force_subclients[2]; | |
707 | sc_addr[1] = force_subclients[3]; | |
708 | } else { | |
709 | int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR); | |
710 | sc_addr[0] = 0x48 + (val & 0x07); | |
711 | sc_addr[1] = 0x48 + ((val >> 4) & 0x07); | |
712 | } | |
713 | ||
714 | if (sc_addr[0] == sc_addr[1]) { | |
715 | dev_err(&client->dev, | |
716 | "duplicate addresses 0x%x for subclients\n", | |
717 | sc_addr[0]); | |
718 | err = -ENODEV; | |
719 | goto ERROR_SC_2; | |
720 | } | |
721 | ||
722 | data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]); | |
723 | if (!data->lm75[0]) { | |
724 | dev_err(&client->dev, | |
725 | "subclient %d registration at address 0x%x failed.\n", | |
726 | 1, sc_addr[0]); | |
727 | err = -ENOMEM; | |
728 | goto ERROR_SC_2; | |
729 | } | |
730 | ||
731 | data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]); | |
732 | if (!data->lm75[1]) { | |
733 | dev_err(&client->dev, | |
734 | "subclient %d registration at address 0x%x failed.\n", | |
735 | 2, sc_addr[1]); | |
736 | err = -ENOMEM; | |
737 | goto ERROR_SC_3; | |
738 | } | |
739 | ||
740 | return 0; | |
741 | ||
742 | /* Undo inits in case of errors */ | |
743 | ERROR_SC_3: | |
744 | i2c_unregister_device(data->lm75[0]); | |
745 | ERROR_SC_2: | |
746 | return err; | |
747 | } | |
748 | ||
749 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
750 | static int asb100_detect(struct i2c_client *client, | |
751 | struct i2c_board_info *info) | |
752 | { | |
753 | struct i2c_adapter *adapter = client->adapter; | |
754 | int val1, val2; | |
755 | ||
756 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
757 | pr_debug("detect failed, smbus byte data not supported!\n"); | |
758 | return -ENODEV; | |
759 | } | |
760 | ||
761 | val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK); | |
762 | val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); | |
763 | ||
764 | /* If we're in bank 0 */ | |
765 | if ((!(val1 & 0x07)) && | |
766 | /* Check for ASB100 ID (low byte) */ | |
767 | (((!(val1 & 0x80)) && (val2 != 0x94)) || | |
768 | /* Check for ASB100 ID (high byte ) */ | |
769 | ((val1 & 0x80) && (val2 != 0x06)))) { | |
770 | pr_debug("detect failed, bad chip id 0x%02x!\n", val2); | |
771 | return -ENODEV; | |
772 | } | |
773 | ||
774 | /* Put it now into bank 0 and Vendor ID High Byte */ | |
775 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, | |
776 | (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78) | |
777 | | 0x80); | |
778 | ||
779 | /* Determine the chip type. */ | |
780 | val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID); | |
781 | val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN); | |
782 | ||
783 | if (val1 != 0x31 || val2 != 0x06) | |
784 | return -ENODEV; | |
785 | ||
786 | strlcpy(info->type, "asb100", I2C_NAME_SIZE); | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | static int asb100_probe(struct i2c_client *client, | |
792 | const struct i2c_device_id *id) | |
793 | { | |
794 | int err; | |
795 | struct asb100_data *data; | |
796 | ||
797 | data = devm_kzalloc(&client->dev, sizeof(struct asb100_data), | |
798 | GFP_KERNEL); | |
799 | if (!data) | |
800 | return -ENOMEM; | |
801 | ||
802 | i2c_set_clientdata(client, data); | |
803 | mutex_init(&data->lock); | |
804 | mutex_init(&data->update_lock); | |
805 | ||
806 | /* Attach secondary lm75 clients */ | |
807 | err = asb100_detect_subclients(client); | |
808 | if (err) | |
809 | return err; | |
810 | ||
811 | /* Initialize the chip */ | |
812 | asb100_init_client(client); | |
813 | ||
814 | /* A few vars need to be filled upon startup */ | |
815 | data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0)); | |
816 | data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1)); | |
817 | data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2)); | |
818 | ||
819 | /* Register sysfs hooks */ | |
820 | err = sysfs_create_group(&client->dev.kobj, &asb100_group); | |
821 | if (err) | |
822 | goto ERROR3; | |
823 | ||
824 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
825 | if (IS_ERR(data->hwmon_dev)) { | |
826 | err = PTR_ERR(data->hwmon_dev); | |
827 | goto ERROR4; | |
828 | } | |
829 | ||
830 | return 0; | |
831 | ||
832 | ERROR4: | |
833 | sysfs_remove_group(&client->dev.kobj, &asb100_group); | |
834 | ERROR3: | |
835 | i2c_unregister_device(data->lm75[1]); | |
836 | i2c_unregister_device(data->lm75[0]); | |
837 | return err; | |
838 | } | |
839 | ||
840 | static int asb100_remove(struct i2c_client *client) | |
841 | { | |
842 | struct asb100_data *data = i2c_get_clientdata(client); | |
843 | ||
844 | hwmon_device_unregister(data->hwmon_dev); | |
845 | sysfs_remove_group(&client->dev.kobj, &asb100_group); | |
846 | ||
847 | i2c_unregister_device(data->lm75[1]); | |
848 | i2c_unregister_device(data->lm75[0]); | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | /* | |
854 | * The SMBus locks itself, usually, but nothing may access the chip between | |
855 | * bank switches. | |
856 | */ | |
857 | static int asb100_read_value(struct i2c_client *client, u16 reg) | |
858 | { | |
859 | struct asb100_data *data = i2c_get_clientdata(client); | |
860 | struct i2c_client *cl; | |
861 | int res, bank; | |
862 | ||
863 | mutex_lock(&data->lock); | |
864 | ||
865 | bank = (reg >> 8) & 0x0f; | |
866 | if (bank > 2) | |
867 | /* switch banks */ | |
868 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); | |
869 | ||
870 | if (bank == 0 || bank > 2) { | |
871 | res = i2c_smbus_read_byte_data(client, reg & 0xff); | |
872 | } else { | |
873 | /* switch to subclient */ | |
874 | cl = data->lm75[bank - 1]; | |
875 | ||
876 | /* convert from ISA to LM75 I2C addresses */ | |
877 | switch (reg & 0xff) { | |
878 | case 0x50: /* TEMP */ | |
879 | res = i2c_smbus_read_word_swapped(cl, 0); | |
880 | break; | |
881 | case 0x52: /* CONFIG */ | |
882 | res = i2c_smbus_read_byte_data(cl, 1); | |
883 | break; | |
884 | case 0x53: /* HYST */ | |
885 | res = i2c_smbus_read_word_swapped(cl, 2); | |
886 | break; | |
887 | case 0x55: /* MAX */ | |
888 | default: | |
889 | res = i2c_smbus_read_word_swapped(cl, 3); | |
890 | break; | |
891 | } | |
892 | } | |
893 | ||
894 | if (bank > 2) | |
895 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); | |
896 | ||
897 | mutex_unlock(&data->lock); | |
898 | ||
899 | return res; | |
900 | } | |
901 | ||
902 | static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value) | |
903 | { | |
904 | struct asb100_data *data = i2c_get_clientdata(client); | |
905 | struct i2c_client *cl; | |
906 | int bank; | |
907 | ||
908 | mutex_lock(&data->lock); | |
909 | ||
910 | bank = (reg >> 8) & 0x0f; | |
911 | if (bank > 2) | |
912 | /* switch banks */ | |
913 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank); | |
914 | ||
915 | if (bank == 0 || bank > 2) { | |
916 | i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff); | |
917 | } else { | |
918 | /* switch to subclient */ | |
919 | cl = data->lm75[bank - 1]; | |
920 | ||
921 | /* convert from ISA to LM75 I2C addresses */ | |
922 | switch (reg & 0xff) { | |
923 | case 0x52: /* CONFIG */ | |
924 | i2c_smbus_write_byte_data(cl, 1, value & 0xff); | |
925 | break; | |
926 | case 0x53: /* HYST */ | |
927 | i2c_smbus_write_word_swapped(cl, 2, value); | |
928 | break; | |
929 | case 0x55: /* MAX */ | |
930 | i2c_smbus_write_word_swapped(cl, 3, value); | |
931 | break; | |
932 | } | |
933 | } | |
934 | ||
935 | if (bank > 2) | |
936 | i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0); | |
937 | ||
938 | mutex_unlock(&data->lock); | |
939 | } | |
940 | ||
941 | static void asb100_init_client(struct i2c_client *client) | |
942 | { | |
943 | struct asb100_data *data = i2c_get_clientdata(client); | |
944 | ||
945 | data->vrm = vid_which_vrm(); | |
946 | ||
947 | /* Start monitoring */ | |
948 | asb100_write_value(client, ASB100_REG_CONFIG, | |
949 | (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01); | |
950 | } | |
951 | ||
952 | static struct asb100_data *asb100_update_device(struct device *dev) | |
953 | { | |
954 | struct i2c_client *client = to_i2c_client(dev); | |
955 | struct asb100_data *data = i2c_get_clientdata(client); | |
956 | int i; | |
957 | ||
958 | mutex_lock(&data->update_lock); | |
959 | ||
960 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
961 | || !data->valid) { | |
962 | ||
963 | dev_dbg(&client->dev, "starting device update...\n"); | |
964 | ||
965 | /* 7 voltage inputs */ | |
966 | for (i = 0; i < 7; i++) { | |
967 | data->in[i] = asb100_read_value(client, | |
968 | ASB100_REG_IN(i)); | |
969 | data->in_min[i] = asb100_read_value(client, | |
970 | ASB100_REG_IN_MIN(i)); | |
971 | data->in_max[i] = asb100_read_value(client, | |
972 | ASB100_REG_IN_MAX(i)); | |
973 | } | |
974 | ||
975 | /* 3 fan inputs */ | |
976 | for (i = 0; i < 3; i++) { | |
977 | data->fan[i] = asb100_read_value(client, | |
978 | ASB100_REG_FAN(i)); | |
979 | data->fan_min[i] = asb100_read_value(client, | |
980 | ASB100_REG_FAN_MIN(i)); | |
981 | } | |
982 | ||
983 | /* 4 temperature inputs */ | |
984 | for (i = 1; i <= 4; i++) { | |
985 | data->temp[i-1] = asb100_read_value(client, | |
986 | ASB100_REG_TEMP(i)); | |
987 | data->temp_max[i-1] = asb100_read_value(client, | |
988 | ASB100_REG_TEMP_MAX(i)); | |
989 | data->temp_hyst[i-1] = asb100_read_value(client, | |
990 | ASB100_REG_TEMP_HYST(i)); | |
991 | } | |
992 | ||
993 | /* VID and fan divisors */ | |
994 | i = asb100_read_value(client, ASB100_REG_VID_FANDIV); | |
995 | data->vid = i & 0x0f; | |
996 | data->vid |= (asb100_read_value(client, | |
997 | ASB100_REG_CHIPID) & 0x01) << 4; | |
998 | data->fan_div[0] = (i >> 4) & 0x03; | |
999 | data->fan_div[1] = (i >> 6) & 0x03; | |
1000 | data->fan_div[2] = (asb100_read_value(client, | |
1001 | ASB100_REG_PIN) >> 6) & 0x03; | |
1002 | ||
1003 | /* PWM */ | |
1004 | data->pwm = asb100_read_value(client, ASB100_REG_PWM1); | |
1005 | ||
1006 | /* alarms */ | |
1007 | data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) + | |
1008 | (asb100_read_value(client, ASB100_REG_ALARM2) << 8); | |
1009 | ||
1010 | data->last_updated = jiffies; | |
1011 | data->valid = 1; | |
1012 | ||
1013 | dev_dbg(&client->dev, "... device update complete\n"); | |
1014 | } | |
1015 | ||
1016 | mutex_unlock(&data->update_lock); | |
1017 | ||
1018 | return data; | |
1019 | } | |
1020 | ||
1021 | module_i2c_driver(asb100_driver); | |
1022 | ||
1023 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); | |
1024 | MODULE_DESCRIPTION("ASB100 Bach driver"); | |
1025 | MODULE_LICENSE("GPL"); |