1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware |
4 | * monitoring |
5 | * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and |
6 | * Kyosti Malkki <kmalkki@cc.hut.fi> |
7 | * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and |
8 | * Jean Delvare <jdelvare@suse.de> |
9 | * |
10 | * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare |
11 | * and advice of Greg Kroah-Hartman. |
12 | * |
13 | * Notes about the port: |
14 | * Release 0x00 of the GL518SM chipset doesn't support reading of in0, |
15 | * in1 nor in2. The original driver had an ugly workaround to get them |
16 | * anyway (changing limits and watching alarms trigger and wear off). |
17 | * We did not keep that part of the original driver in the Linux 2.6 |
18 | * version, since it was making the driver significantly more complex |
19 | * with no real benefit. |
20 | */ |
21 | |
22 | #include <linux/module.h> |
23 | #include <linux/init.h> |
24 | #include <linux/slab.h> |
25 | #include <linux/jiffies.h> |
26 | #include <linux/i2c.h> |
27 | #include <linux/hwmon.h> |
28 | #include <linux/hwmon-sysfs.h> |
29 | #include <linux/err.h> |
30 | #include <linux/mutex.h> |
31 | #include <linux/sysfs.h> |
32 | |
33 | /* Addresses to scan */ |
34 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; |
35 | |
36 | enum chips { gl518sm_r00, gl518sm_r80 }; |
37 | |
38 | /* Many GL518 constants specified below */ |
39 | |
40 | /* The GL518 registers */ |
41 | #define GL518_REG_CHIP_ID 0x00 |
42 | #define GL518_REG_REVISION 0x01 |
43 | #define GL518_REG_VENDOR_ID 0x02 |
44 | #define GL518_REG_CONF 0x03 |
45 | #define GL518_REG_TEMP_IN 0x04 |
46 | #define GL518_REG_TEMP_MAX 0x05 |
47 | #define GL518_REG_TEMP_HYST 0x06 |
48 | #define GL518_REG_FAN_COUNT 0x07 |
49 | #define GL518_REG_FAN_LIMIT 0x08 |
50 | #define GL518_REG_VIN1_LIMIT 0x09 |
51 | #define GL518_REG_VIN2_LIMIT 0x0a |
52 | #define GL518_REG_VIN3_LIMIT 0x0b |
53 | #define GL518_REG_VDD_LIMIT 0x0c |
54 | #define GL518_REG_VIN3 0x0d |
55 | #define GL518_REG_MISC 0x0f |
56 | #define GL518_REG_ALARM 0x10 |
57 | #define GL518_REG_MASK 0x11 |
58 | #define GL518_REG_INT 0x12 |
59 | #define GL518_REG_VIN2 0x13 |
60 | #define GL518_REG_VIN1 0x14 |
61 | #define GL518_REG_VDD 0x15 |
62 | |
63 | |
64 | /* |
65 | * Conversions. Rounding and limit checking is only done on the TO_REG |
66 | * variants. Note that you should be a bit careful with which arguments |
67 | * these macros are called: arguments may be evaluated more than once. |
68 | * Fixing this is just not worth it. |
69 | */ |
70 | |
71 | #define RAW_FROM_REG(val) val |
72 | |
73 | #define BOOL_FROM_REG(val) ((val) ? 0 : 1) |
74 | #define BOOL_TO_REG(val) ((val) ? 0 : 1) |
75 | |
76 | #define TEMP_CLAMP(val) clamp_val(val, -119000, 136000) |
77 | #define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 119) |
78 | #define TEMP_FROM_REG(val) (((val) - 119) * 1000) |
79 | |
80 | static inline u8 FAN_TO_REG(long rpm, int div) |
81 | { |
82 | long rpmdiv; |
83 | if (rpm == 0) |
84 | return 0; |
85 | rpmdiv = clamp_val(rpm, 1, 960000) * div; |
86 | return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255); |
87 | } |
88 | #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div)))) |
89 | |
90 | #define IN_CLAMP(val) clamp_val(val, 0, 255 * 19) |
91 | #define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19) |
92 | #define IN_FROM_REG(val) ((val) * 19) |
93 | |
94 | #define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4) |
95 | #define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95) |
96 | #define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4) |
97 | |
98 | #define DIV_FROM_REG(val) (1 << (val)) |
99 | |
100 | #define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) |
101 | #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f) |
102 | |
103 | /* Each client has this additional data */ |
104 | struct gl518_data { |
105 | struct i2c_client *client; |
106 | const struct attribute_group *groups[3]; |
107 | enum chips type; |
108 | |
109 | struct mutex update_lock; |
110 | bool valid; /* true if following fields are valid */ |
111 | unsigned long last_updated; /* In jiffies */ |
112 | |
113 | u8 voltage_in[4]; /* Register values; [0] = VDD */ |
114 | u8 voltage_min[4]; /* Register values; [0] = VDD */ |
115 | u8 voltage_max[4]; /* Register values; [0] = VDD */ |
116 | u8 fan_in[2]; |
117 | u8 fan_min[2]; |
118 | u8 fan_div[2]; /* Register encoding, shifted right */ |
119 | u8 fan_auto1; /* Boolean */ |
120 | u8 temp_in; /* Register values */ |
121 | u8 temp_max; /* Register values */ |
122 | u8 temp_hyst; /* Register values */ |
123 | u8 alarms; /* Register value */ |
124 | u8 alarm_mask; |
125 | u8 beep_mask; /* Register value */ |
126 | u8 beep_enable; /* Boolean */ |
127 | }; |
128 | |
129 | /* |
130 | * Registers 0x07 to 0x0c are word-sized, others are byte-sized |
131 | * GL518 uses a high-byte first convention, which is exactly opposite to |
132 | * the SMBus standard. |
133 | */ |
134 | static int gl518_read_value(struct i2c_client *client, u8 reg) |
135 | { |
136 | if ((reg >= 0x07) && (reg <= 0x0c)) |
137 | return i2c_smbus_read_word_swapped(client, command: reg); |
138 | else |
139 | return i2c_smbus_read_byte_data(client, command: reg); |
140 | } |
141 | |
142 | static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) |
143 | { |
144 | if ((reg >= 0x07) && (reg <= 0x0c)) |
145 | return i2c_smbus_write_word_swapped(client, command: reg, value); |
146 | else |
147 | return i2c_smbus_write_byte_data(client, command: reg, value); |
148 | } |
149 | |
150 | static struct gl518_data *gl518_update_device(struct device *dev) |
151 | { |
152 | struct gl518_data *data = dev_get_drvdata(dev); |
153 | struct i2c_client *client = data->client; |
154 | int val; |
155 | |
156 | mutex_lock(&data->update_lock); |
157 | |
158 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
159 | || !data->valid) { |
160 | dev_dbg(&client->dev, "Starting gl518 update\n" ); |
161 | |
162 | data->alarms = gl518_read_value(client, GL518_REG_INT); |
163 | data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); |
164 | |
165 | val = gl518_read_value(client, GL518_REG_VDD_LIMIT); |
166 | data->voltage_min[0] = val & 0xff; |
167 | data->voltage_max[0] = (val >> 8) & 0xff; |
168 | val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); |
169 | data->voltage_min[1] = val & 0xff; |
170 | data->voltage_max[1] = (val >> 8) & 0xff; |
171 | val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); |
172 | data->voltage_min[2] = val & 0xff; |
173 | data->voltage_max[2] = (val >> 8) & 0xff; |
174 | val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); |
175 | data->voltage_min[3] = val & 0xff; |
176 | data->voltage_max[3] = (val >> 8) & 0xff; |
177 | |
178 | val = gl518_read_value(client, GL518_REG_FAN_COUNT); |
179 | data->fan_in[0] = (val >> 8) & 0xff; |
180 | data->fan_in[1] = val & 0xff; |
181 | |
182 | val = gl518_read_value(client, GL518_REG_FAN_LIMIT); |
183 | data->fan_min[0] = (val >> 8) & 0xff; |
184 | data->fan_min[1] = val & 0xff; |
185 | |
186 | data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); |
187 | data->temp_max = |
188 | gl518_read_value(client, GL518_REG_TEMP_MAX); |
189 | data->temp_hyst = |
190 | gl518_read_value(client, GL518_REG_TEMP_HYST); |
191 | |
192 | val = gl518_read_value(client, GL518_REG_MISC); |
193 | data->fan_div[0] = (val >> 6) & 0x03; |
194 | data->fan_div[1] = (val >> 4) & 0x03; |
195 | data->fan_auto1 = (val >> 3) & 0x01; |
196 | |
197 | data->alarms &= data->alarm_mask; |
198 | |
199 | val = gl518_read_value(client, GL518_REG_CONF); |
200 | data->beep_enable = (val >> 2) & 1; |
201 | |
202 | if (data->type != gl518sm_r00) { |
203 | data->voltage_in[0] = |
204 | gl518_read_value(client, GL518_REG_VDD); |
205 | data->voltage_in[1] = |
206 | gl518_read_value(client, GL518_REG_VIN1); |
207 | data->voltage_in[2] = |
208 | gl518_read_value(client, GL518_REG_VIN2); |
209 | } |
210 | data->voltage_in[3] = |
211 | gl518_read_value(client, GL518_REG_VIN3); |
212 | |
213 | data->last_updated = jiffies; |
214 | data->valid = true; |
215 | } |
216 | |
217 | mutex_unlock(lock: &data->update_lock); |
218 | |
219 | return data; |
220 | } |
221 | |
222 | /* |
223 | * Sysfs stuff |
224 | */ |
225 | |
226 | #define show(type, suffix, value) \ |
227 | static ssize_t show_##suffix(struct device *dev, \ |
228 | struct device_attribute *attr, char *buf) \ |
229 | { \ |
230 | struct gl518_data *data = gl518_update_device(dev); \ |
231 | return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ |
232 | } |
233 | |
234 | show(TEMP, temp_input1, temp_in); |
235 | show(TEMP, temp_max1, temp_max); |
236 | show(TEMP, temp_hyst1, temp_hyst); |
237 | show(BOOL, fan_auto1, fan_auto1); |
238 | show(VDD, in_input0, voltage_in[0]); |
239 | show(IN, in_input1, voltage_in[1]); |
240 | show(IN, in_input2, voltage_in[2]); |
241 | show(IN, in_input3, voltage_in[3]); |
242 | show(VDD, in_min0, voltage_min[0]); |
243 | show(IN, in_min1, voltage_min[1]); |
244 | show(IN, in_min2, voltage_min[2]); |
245 | show(IN, in_min3, voltage_min[3]); |
246 | show(VDD, in_max0, voltage_max[0]); |
247 | show(IN, in_max1, voltage_max[1]); |
248 | show(IN, in_max2, voltage_max[2]); |
249 | show(IN, in_max3, voltage_max[3]); |
250 | show(RAW, alarms, alarms); |
251 | show(BOOL, beep_enable, beep_enable); |
252 | show(BEEP_MASK, beep_mask, beep_mask); |
253 | |
254 | static ssize_t fan_input_show(struct device *dev, |
255 | struct device_attribute *attr, char *buf) |
256 | { |
257 | int nr = to_sensor_dev_attr(attr)->index; |
258 | struct gl518_data *data = gl518_update_device(dev); |
259 | return sprintf(buf, fmt: "%d\n" , FAN_FROM_REG(data->fan_in[nr], |
260 | DIV_FROM_REG(data->fan_div[nr]))); |
261 | } |
262 | |
263 | static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, |
264 | char *buf) |
265 | { |
266 | int nr = to_sensor_dev_attr(attr)->index; |
267 | struct gl518_data *data = gl518_update_device(dev); |
268 | return sprintf(buf, fmt: "%d\n" , FAN_FROM_REG(data->fan_min[nr], |
269 | DIV_FROM_REG(data->fan_div[nr]))); |
270 | } |
271 | |
272 | static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr, |
273 | char *buf) |
274 | { |
275 | int nr = to_sensor_dev_attr(attr)->index; |
276 | struct gl518_data *data = gl518_update_device(dev); |
277 | return sprintf(buf, fmt: "%d\n" , DIV_FROM_REG(data->fan_div[nr])); |
278 | } |
279 | |
280 | #define set(type, suffix, value, reg) \ |
281 | static ssize_t set_##suffix(struct device *dev, \ |
282 | struct device_attribute *attr, \ |
283 | const char *buf, size_t count) \ |
284 | { \ |
285 | struct gl518_data *data = dev_get_drvdata(dev); \ |
286 | struct i2c_client *client = data->client; \ |
287 | long val; \ |
288 | int err = kstrtol(buf, 10, &val); \ |
289 | if (err) \ |
290 | return err; \ |
291 | \ |
292 | mutex_lock(&data->update_lock); \ |
293 | data->value = type##_TO_REG(val); \ |
294 | gl518_write_value(client, reg, data->value); \ |
295 | mutex_unlock(&data->update_lock); \ |
296 | return count; \ |
297 | } |
298 | |
299 | #define set_bits(type, suffix, value, reg, mask, shift) \ |
300 | static ssize_t set_##suffix(struct device *dev, \ |
301 | struct device_attribute *attr, \ |
302 | const char *buf, size_t count) \ |
303 | { \ |
304 | struct gl518_data *data = dev_get_drvdata(dev); \ |
305 | struct i2c_client *client = data->client; \ |
306 | int regvalue; \ |
307 | unsigned long val; \ |
308 | int err = kstrtoul(buf, 10, &val); \ |
309 | if (err) \ |
310 | return err; \ |
311 | \ |
312 | mutex_lock(&data->update_lock); \ |
313 | regvalue = gl518_read_value(client, reg); \ |
314 | data->value = type##_TO_REG(val); \ |
315 | regvalue = (regvalue & ~mask) | (data->value << shift); \ |
316 | gl518_write_value(client, reg, regvalue); \ |
317 | mutex_unlock(&data->update_lock); \ |
318 | return count; \ |
319 | } |
320 | |
321 | #define set_low(type, suffix, value, reg) \ |
322 | set_bits(type, suffix, value, reg, 0x00ff, 0) |
323 | #define set_high(type, suffix, value, reg) \ |
324 | set_bits(type, suffix, value, reg, 0xff00, 8) |
325 | |
326 | set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); |
327 | set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); |
328 | set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); |
329 | set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); |
330 | set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); |
331 | set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); |
332 | set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); |
333 | set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); |
334 | set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); |
335 | set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); |
336 | set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); |
337 | set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); |
338 | set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); |
339 | |
340 | static ssize_t fan_min_store(struct device *dev, |
341 | struct device_attribute *attr, const char *buf, |
342 | size_t count) |
343 | { |
344 | struct gl518_data *data = dev_get_drvdata(dev); |
345 | struct i2c_client *client = data->client; |
346 | int nr = to_sensor_dev_attr(attr)->index; |
347 | int regvalue; |
348 | unsigned long val; |
349 | int err; |
350 | |
351 | err = kstrtoul(s: buf, base: 10, res: &val); |
352 | if (err) |
353 | return err; |
354 | |
355 | mutex_lock(&data->update_lock); |
356 | regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); |
357 | data->fan_min[nr] = FAN_TO_REG(rpm: val, DIV_FROM_REG(data->fan_div[nr])); |
358 | regvalue = (regvalue & (0xff << (8 * nr))) |
359 | | (data->fan_min[nr] << (8 * (1 - nr))); |
360 | gl518_write_value(client, GL518_REG_FAN_LIMIT, value: regvalue); |
361 | |
362 | data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); |
363 | if (data->fan_min[nr] == 0) |
364 | data->alarm_mask &= ~(0x20 << nr); |
365 | else |
366 | data->alarm_mask |= (0x20 << nr); |
367 | data->beep_mask &= data->alarm_mask; |
368 | gl518_write_value(client, GL518_REG_ALARM, value: data->beep_mask); |
369 | |
370 | mutex_unlock(lock: &data->update_lock); |
371 | return count; |
372 | } |
373 | |
374 | static ssize_t fan_div_store(struct device *dev, |
375 | struct device_attribute *attr, const char *buf, |
376 | size_t count) |
377 | { |
378 | struct gl518_data *data = dev_get_drvdata(dev); |
379 | struct i2c_client *client = data->client; |
380 | int nr = to_sensor_dev_attr(attr)->index; |
381 | int regvalue; |
382 | unsigned long val; |
383 | int err; |
384 | |
385 | err = kstrtoul(s: buf, base: 10, res: &val); |
386 | if (err) |
387 | return err; |
388 | |
389 | switch (val) { |
390 | case 1: |
391 | val = 0; |
392 | break; |
393 | case 2: |
394 | val = 1; |
395 | break; |
396 | case 4: |
397 | val = 2; |
398 | break; |
399 | case 8: |
400 | val = 3; |
401 | break; |
402 | default: |
403 | dev_err(dev, |
404 | "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n" , |
405 | val); |
406 | return -EINVAL; |
407 | } |
408 | |
409 | mutex_lock(&data->update_lock); |
410 | regvalue = gl518_read_value(client, GL518_REG_MISC); |
411 | data->fan_div[nr] = val; |
412 | regvalue = (regvalue & ~(0xc0 >> (2 * nr))) |
413 | | (data->fan_div[nr] << (6 - 2 * nr)); |
414 | gl518_write_value(client, GL518_REG_MISC, value: regvalue); |
415 | mutex_unlock(lock: &data->update_lock); |
416 | return count; |
417 | } |
418 | |
419 | static DEVICE_ATTR(temp1_input, 0444, show_temp_input1, NULL); |
420 | static DEVICE_ATTR(temp1_max, 0644, show_temp_max1, set_temp_max1); |
421 | static DEVICE_ATTR(temp1_max_hyst, 0644, |
422 | show_temp_hyst1, set_temp_hyst1); |
423 | static DEVICE_ATTR(fan1_auto, 0644, show_fan_auto1, set_fan_auto1); |
424 | static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0); |
425 | static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1); |
426 | static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); |
427 | static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); |
428 | static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); |
429 | static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); |
430 | static DEVICE_ATTR(in0_input, 0444, show_in_input0, NULL); |
431 | static DEVICE_ATTR(in1_input, 0444, show_in_input1, NULL); |
432 | static DEVICE_ATTR(in2_input, 0444, show_in_input2, NULL); |
433 | static DEVICE_ATTR(in3_input, 0444, show_in_input3, NULL); |
434 | static DEVICE_ATTR(in0_min, 0644, show_in_min0, set_in_min0); |
435 | static DEVICE_ATTR(in1_min, 0644, show_in_min1, set_in_min1); |
436 | static DEVICE_ATTR(in2_min, 0644, show_in_min2, set_in_min2); |
437 | static DEVICE_ATTR(in3_min, 0644, show_in_min3, set_in_min3); |
438 | static DEVICE_ATTR(in0_max, 0644, show_in_max0, set_in_max0); |
439 | static DEVICE_ATTR(in1_max, 0644, show_in_max1, set_in_max1); |
440 | static DEVICE_ATTR(in2_max, 0644, show_in_max2, set_in_max2); |
441 | static DEVICE_ATTR(in3_max, 0644, show_in_max3, set_in_max3); |
442 | static DEVICE_ATTR(alarms, 0444, show_alarms, NULL); |
443 | static DEVICE_ATTR(beep_enable, 0644, |
444 | show_beep_enable, set_beep_enable); |
445 | static DEVICE_ATTR(beep_mask, 0644, |
446 | show_beep_mask, set_beep_mask); |
447 | |
448 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
449 | char *buf) |
450 | { |
451 | int bitnr = to_sensor_dev_attr(attr)->index; |
452 | struct gl518_data *data = gl518_update_device(dev); |
453 | return sprintf(buf, fmt: "%u\n" , (data->alarms >> bitnr) & 1); |
454 | } |
455 | |
456 | static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); |
457 | static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); |
458 | static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); |
459 | static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); |
460 | static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); |
461 | static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5); |
462 | static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6); |
463 | |
464 | static ssize_t beep_show(struct device *dev, struct device_attribute *attr, |
465 | char *buf) |
466 | { |
467 | int bitnr = to_sensor_dev_attr(attr)->index; |
468 | struct gl518_data *data = gl518_update_device(dev); |
469 | return sprintf(buf, fmt: "%u\n" , (data->beep_mask >> bitnr) & 1); |
470 | } |
471 | |
472 | static ssize_t beep_store(struct device *dev, struct device_attribute *attr, |
473 | const char *buf, size_t count) |
474 | { |
475 | struct gl518_data *data = dev_get_drvdata(dev); |
476 | struct i2c_client *client = data->client; |
477 | int bitnr = to_sensor_dev_attr(attr)->index; |
478 | unsigned long bit; |
479 | int err; |
480 | |
481 | err = kstrtoul(s: buf, base: 10, res: &bit); |
482 | if (err) |
483 | return err; |
484 | |
485 | if (bit & ~1) |
486 | return -EINVAL; |
487 | |
488 | mutex_lock(&data->update_lock); |
489 | data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); |
490 | if (bit) |
491 | data->beep_mask |= (1 << bitnr); |
492 | else |
493 | data->beep_mask &= ~(1 << bitnr); |
494 | gl518_write_value(client, GL518_REG_ALARM, value: data->beep_mask); |
495 | mutex_unlock(lock: &data->update_lock); |
496 | return count; |
497 | } |
498 | |
499 | static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0); |
500 | static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1); |
501 | static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2); |
502 | static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3); |
503 | static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4); |
504 | static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5); |
505 | static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6); |
506 | |
507 | static struct attribute *gl518_attributes[] = { |
508 | &dev_attr_in3_input.attr, |
509 | &dev_attr_in0_min.attr, |
510 | &dev_attr_in1_min.attr, |
511 | &dev_attr_in2_min.attr, |
512 | &dev_attr_in3_min.attr, |
513 | &dev_attr_in0_max.attr, |
514 | &dev_attr_in1_max.attr, |
515 | &dev_attr_in2_max.attr, |
516 | &dev_attr_in3_max.attr, |
517 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
518 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
519 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
520 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
521 | &sensor_dev_attr_in0_beep.dev_attr.attr, |
522 | &sensor_dev_attr_in1_beep.dev_attr.attr, |
523 | &sensor_dev_attr_in2_beep.dev_attr.attr, |
524 | &sensor_dev_attr_in3_beep.dev_attr.attr, |
525 | |
526 | &dev_attr_fan1_auto.attr, |
527 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
528 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
529 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
530 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
531 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
532 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
533 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
534 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
535 | &sensor_dev_attr_fan1_beep.dev_attr.attr, |
536 | &sensor_dev_attr_fan2_beep.dev_attr.attr, |
537 | |
538 | &dev_attr_temp1_input.attr, |
539 | &dev_attr_temp1_max.attr, |
540 | &dev_attr_temp1_max_hyst.attr, |
541 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
542 | &sensor_dev_attr_temp1_beep.dev_attr.attr, |
543 | |
544 | &dev_attr_alarms.attr, |
545 | &dev_attr_beep_enable.attr, |
546 | &dev_attr_beep_mask.attr, |
547 | NULL |
548 | }; |
549 | |
550 | static const struct attribute_group gl518_group = { |
551 | .attrs = gl518_attributes, |
552 | }; |
553 | |
554 | static struct attribute *gl518_attributes_r80[] = { |
555 | &dev_attr_in0_input.attr, |
556 | &dev_attr_in1_input.attr, |
557 | &dev_attr_in2_input.attr, |
558 | NULL |
559 | }; |
560 | |
561 | static const struct attribute_group gl518_group_r80 = { |
562 | .attrs = gl518_attributes_r80, |
563 | }; |
564 | |
565 | /* |
566 | * Real code |
567 | */ |
568 | |
569 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
570 | static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) |
571 | { |
572 | struct i2c_adapter *adapter = client->adapter; |
573 | int rev; |
574 | |
575 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
576 | I2C_FUNC_SMBUS_WORD_DATA)) |
577 | return -ENODEV; |
578 | |
579 | /* Now, we do the remaining detection. */ |
580 | if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) |
581 | || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) |
582 | return -ENODEV; |
583 | |
584 | /* Determine the chip type. */ |
585 | rev = gl518_read_value(client, GL518_REG_REVISION); |
586 | if (rev != 0x00 && rev != 0x80) |
587 | return -ENODEV; |
588 | |
589 | strscpy(info->type, "gl518sm" , I2C_NAME_SIZE); |
590 | |
591 | return 0; |
592 | } |
593 | |
594 | /* |
595 | * Called when we have found a new GL518SM. |
596 | * Note that we preserve D4:NoFan2 and D2:beep_enable. |
597 | */ |
598 | static void gl518_init_client(struct i2c_client *client) |
599 | { |
600 | /* Make sure we leave D7:Reset untouched */ |
601 | u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; |
602 | |
603 | /* Comparator mode (D3=0), standby mode (D6=0) */ |
604 | gl518_write_value(client, GL518_REG_CONF, value: (regvalue &= 0x37)); |
605 | |
606 | /* Never interrupts */ |
607 | gl518_write_value(client, GL518_REG_MASK, value: 0x00); |
608 | |
609 | /* Clear status register (D5=1), start (D6=1) */ |
610 | gl518_write_value(client, GL518_REG_CONF, value: 0x20 | regvalue); |
611 | gl518_write_value(client, GL518_REG_CONF, value: 0x40 | regvalue); |
612 | } |
613 | |
614 | static int gl518_probe(struct i2c_client *client) |
615 | { |
616 | struct device *dev = &client->dev; |
617 | struct device *hwmon_dev; |
618 | struct gl518_data *data; |
619 | int revision; |
620 | |
621 | data = devm_kzalloc(dev, size: sizeof(struct gl518_data), GFP_KERNEL); |
622 | if (!data) |
623 | return -ENOMEM; |
624 | |
625 | data->client = client; |
626 | revision = gl518_read_value(client, GL518_REG_REVISION); |
627 | data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; |
628 | mutex_init(&data->update_lock); |
629 | |
630 | /* Initialize the GL518SM chip */ |
631 | data->alarm_mask = 0xff; |
632 | gl518_init_client(client); |
633 | |
634 | /* sysfs hooks */ |
635 | data->groups[0] = &gl518_group; |
636 | if (data->type == gl518sm_r80) |
637 | data->groups[1] = &gl518_group_r80; |
638 | |
639 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, name: client->name, |
640 | drvdata: data, groups: data->groups); |
641 | return PTR_ERR_OR_ZERO(ptr: hwmon_dev); |
642 | } |
643 | |
644 | static const struct i2c_device_id gl518_id[] = { |
645 | { "gl518sm" , 0 }, |
646 | { } |
647 | }; |
648 | MODULE_DEVICE_TABLE(i2c, gl518_id); |
649 | |
650 | static struct i2c_driver gl518_driver = { |
651 | .class = I2C_CLASS_HWMON, |
652 | .driver = { |
653 | .name = "gl518sm" , |
654 | }, |
655 | .probe = gl518_probe, |
656 | .id_table = gl518_id, |
657 | .detect = gl518_detect, |
658 | .address_list = normal_i2c, |
659 | }; |
660 | |
661 | module_i2c_driver(gl518_driver); |
662 | |
663 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " |
664 | "Kyosti Malkki <kmalkki@cc.hut.fi> and " |
665 | "Hong-Gunn Chew <hglinux@gunnet.org>" ); |
666 | MODULE_DESCRIPTION("GL518SM driver" ); |
667 | MODULE_LICENSE("GPL" ); |
668 | |