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1 | /* | |
2 | * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring | |
4 | * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and | |
5 | * Kyosti Malkki <kmalkki@cc.hut.fi> | |
6 | * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and | |
7 | * Jean Delvare <jdelvare@suse.de> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare | |
24 | * and advice of Greg Kroah-Hartman. | |
25 | * | |
26 | * Notes about the port: | |
27 | * Release 0x00 of the GL518SM chipset doesn't support reading of in0, | |
28 | * in1 nor in2. The original driver had an ugly workaround to get them | |
29 | * anyway (changing limits and watching alarms trigger and wear off). | |
30 | * We did not keep that part of the original driver in the Linux 2.6 | |
31 | * version, since it was making the driver significantly more complex | |
32 | * with no real benefit. | |
33 | */ | |
34 | ||
35 | #include <linux/module.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/jiffies.h> | |
39 | #include <linux/i2c.h> | |
40 | #include <linux/hwmon.h> | |
41 | #include <linux/hwmon-sysfs.h> | |
42 | #include <linux/err.h> | |
43 | #include <linux/mutex.h> | |
44 | #include <linux/sysfs.h> | |
45 | ||
46 | /* Addresses to scan */ | |
47 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; | |
48 | ||
49 | enum chips { gl518sm_r00, gl518sm_r80 }; | |
50 | ||
51 | /* Many GL518 constants specified below */ | |
52 | ||
53 | /* The GL518 registers */ | |
54 | #define GL518_REG_CHIP_ID 0x00 | |
55 | #define GL518_REG_REVISION 0x01 | |
56 | #define GL518_REG_VENDOR_ID 0x02 | |
57 | #define GL518_REG_CONF 0x03 | |
58 | #define GL518_REG_TEMP_IN 0x04 | |
59 | #define GL518_REG_TEMP_MAX 0x05 | |
60 | #define GL518_REG_TEMP_HYST 0x06 | |
61 | #define GL518_REG_FAN_COUNT 0x07 | |
62 | #define GL518_REG_FAN_LIMIT 0x08 | |
63 | #define GL518_REG_VIN1_LIMIT 0x09 | |
64 | #define GL518_REG_VIN2_LIMIT 0x0a | |
65 | #define GL518_REG_VIN3_LIMIT 0x0b | |
66 | #define GL518_REG_VDD_LIMIT 0x0c | |
67 | #define GL518_REG_VIN3 0x0d | |
68 | #define GL518_REG_MISC 0x0f | |
69 | #define GL518_REG_ALARM 0x10 | |
70 | #define GL518_REG_MASK 0x11 | |
71 | #define GL518_REG_INT 0x12 | |
72 | #define GL518_REG_VIN2 0x13 | |
73 | #define GL518_REG_VIN1 0x14 | |
74 | #define GL518_REG_VDD 0x15 | |
75 | ||
76 | ||
77 | /* | |
78 | * Conversions. Rounding and limit checking is only done on the TO_REG | |
79 | * variants. Note that you should be a bit careful with which arguments | |
80 | * these macros are called: arguments may be evaluated more than once. | |
81 | * Fixing this is just not worth it. | |
82 | */ | |
83 | ||
84 | #define RAW_FROM_REG(val) val | |
85 | ||
86 | #define BOOL_FROM_REG(val) ((val) ? 0 : 1) | |
87 | #define BOOL_TO_REG(val) ((val) ? 0 : 1) | |
88 | ||
89 | #define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \ | |
90 | (val) - 500 : \ | |
91 | (val) + 500) / 1000) + 119), 0, 255) | |
92 | #define TEMP_FROM_REG(val) (((val) - 119) * 1000) | |
93 | ||
94 | static inline u8 FAN_TO_REG(long rpm, int div) | |
95 | { | |
96 | long rpmdiv; | |
97 | if (rpm == 0) | |
98 | return 0; | |
99 | rpmdiv = clamp_val(rpm, 1, 960000) * div; | |
100 | return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255); | |
101 | } | |
102 | #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div)))) | |
103 | ||
104 | #define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255) | |
105 | #define IN_FROM_REG(val) ((val) * 19) | |
106 | ||
107 | #define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255) | |
108 | #define VDD_FROM_REG(val) (((val) * 95 + 2) / 4) | |
109 | ||
110 | #define DIV_FROM_REG(val) (1 << (val)) | |
111 | ||
112 | #define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask) | |
113 | #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f) | |
114 | ||
115 | /* Each client has this additional data */ | |
116 | struct gl518_data { | |
117 | struct i2c_client *client; | |
118 | const struct attribute_group *groups[3]; | |
119 | enum chips type; | |
120 | ||
121 | struct mutex update_lock; | |
122 | char valid; /* !=0 if following fields are valid */ | |
123 | unsigned long last_updated; /* In jiffies */ | |
124 | ||
125 | u8 voltage_in[4]; /* Register values; [0] = VDD */ | |
126 | u8 voltage_min[4]; /* Register values; [0] = VDD */ | |
127 | u8 voltage_max[4]; /* Register values; [0] = VDD */ | |
128 | u8 fan_in[2]; | |
129 | u8 fan_min[2]; | |
130 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
131 | u8 fan_auto1; /* Boolean */ | |
132 | u8 temp_in; /* Register values */ | |
133 | u8 temp_max; /* Register values */ | |
134 | u8 temp_hyst; /* Register values */ | |
135 | u8 alarms; /* Register value */ | |
136 | u8 alarm_mask; | |
137 | u8 beep_mask; /* Register value */ | |
138 | u8 beep_enable; /* Boolean */ | |
139 | }; | |
140 | ||
141 | /* | |
142 | * Registers 0x07 to 0x0c are word-sized, others are byte-sized | |
143 | * GL518 uses a high-byte first convention, which is exactly opposite to | |
144 | * the SMBus standard. | |
145 | */ | |
146 | static int gl518_read_value(struct i2c_client *client, u8 reg) | |
147 | { | |
148 | if ((reg >= 0x07) && (reg <= 0x0c)) | |
149 | return i2c_smbus_read_word_swapped(client, reg); | |
150 | else | |
151 | return i2c_smbus_read_byte_data(client, reg); | |
152 | } | |
153 | ||
154 | static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) | |
155 | { | |
156 | if ((reg >= 0x07) && (reg <= 0x0c)) | |
157 | return i2c_smbus_write_word_swapped(client, reg, value); | |
158 | else | |
159 | return i2c_smbus_write_byte_data(client, reg, value); | |
160 | } | |
161 | ||
162 | static struct gl518_data *gl518_update_device(struct device *dev) | |
163 | { | |
164 | struct gl518_data *data = dev_get_drvdata(dev); | |
165 | struct i2c_client *client = data->client; | |
166 | int val; | |
167 | ||
168 | mutex_lock(&data->update_lock); | |
169 | ||
170 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
171 | || !data->valid) { | |
172 | dev_dbg(&client->dev, "Starting gl518 update\n"); | |
173 | ||
174 | data->alarms = gl518_read_value(client, GL518_REG_INT); | |
175 | data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); | |
176 | ||
177 | val = gl518_read_value(client, GL518_REG_VDD_LIMIT); | |
178 | data->voltage_min[0] = val & 0xff; | |
179 | data->voltage_max[0] = (val >> 8) & 0xff; | |
180 | val = gl518_read_value(client, GL518_REG_VIN1_LIMIT); | |
181 | data->voltage_min[1] = val & 0xff; | |
182 | data->voltage_max[1] = (val >> 8) & 0xff; | |
183 | val = gl518_read_value(client, GL518_REG_VIN2_LIMIT); | |
184 | data->voltage_min[2] = val & 0xff; | |
185 | data->voltage_max[2] = (val >> 8) & 0xff; | |
186 | val = gl518_read_value(client, GL518_REG_VIN3_LIMIT); | |
187 | data->voltage_min[3] = val & 0xff; | |
188 | data->voltage_max[3] = (val >> 8) & 0xff; | |
189 | ||
190 | val = gl518_read_value(client, GL518_REG_FAN_COUNT); | |
191 | data->fan_in[0] = (val >> 8) & 0xff; | |
192 | data->fan_in[1] = val & 0xff; | |
193 | ||
194 | val = gl518_read_value(client, GL518_REG_FAN_LIMIT); | |
195 | data->fan_min[0] = (val >> 8) & 0xff; | |
196 | data->fan_min[1] = val & 0xff; | |
197 | ||
198 | data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN); | |
199 | data->temp_max = | |
200 | gl518_read_value(client, GL518_REG_TEMP_MAX); | |
201 | data->temp_hyst = | |
202 | gl518_read_value(client, GL518_REG_TEMP_HYST); | |
203 | ||
204 | val = gl518_read_value(client, GL518_REG_MISC); | |
205 | data->fan_div[0] = (val >> 6) & 0x03; | |
206 | data->fan_div[1] = (val >> 4) & 0x03; | |
207 | data->fan_auto1 = (val >> 3) & 0x01; | |
208 | ||
209 | data->alarms &= data->alarm_mask; | |
210 | ||
211 | val = gl518_read_value(client, GL518_REG_CONF); | |
212 | data->beep_enable = (val >> 2) & 1; | |
213 | ||
214 | if (data->type != gl518sm_r00) { | |
215 | data->voltage_in[0] = | |
216 | gl518_read_value(client, GL518_REG_VDD); | |
217 | data->voltage_in[1] = | |
218 | gl518_read_value(client, GL518_REG_VIN1); | |
219 | data->voltage_in[2] = | |
220 | gl518_read_value(client, GL518_REG_VIN2); | |
221 | } | |
222 | data->voltage_in[3] = | |
223 | gl518_read_value(client, GL518_REG_VIN3); | |
224 | ||
225 | data->last_updated = jiffies; | |
226 | data->valid = 1; | |
227 | } | |
228 | ||
229 | mutex_unlock(&data->update_lock); | |
230 | ||
231 | return data; | |
232 | } | |
233 | ||
234 | /* | |
235 | * Sysfs stuff | |
236 | */ | |
237 | ||
238 | #define show(type, suffix, value) \ | |
239 | static ssize_t show_##suffix(struct device *dev, \ | |
240 | struct device_attribute *attr, char *buf) \ | |
241 | { \ | |
242 | struct gl518_data *data = gl518_update_device(dev); \ | |
243 | return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \ | |
244 | } | |
245 | ||
246 | show(TEMP, temp_input1, temp_in); | |
247 | show(TEMP, temp_max1, temp_max); | |
248 | show(TEMP, temp_hyst1, temp_hyst); | |
249 | show(BOOL, fan_auto1, fan_auto1); | |
250 | show(VDD, in_input0, voltage_in[0]); | |
251 | show(IN, in_input1, voltage_in[1]); | |
252 | show(IN, in_input2, voltage_in[2]); | |
253 | show(IN, in_input3, voltage_in[3]); | |
254 | show(VDD, in_min0, voltage_min[0]); | |
255 | show(IN, in_min1, voltage_min[1]); | |
256 | show(IN, in_min2, voltage_min[2]); | |
257 | show(IN, in_min3, voltage_min[3]); | |
258 | show(VDD, in_max0, voltage_max[0]); | |
259 | show(IN, in_max1, voltage_max[1]); | |
260 | show(IN, in_max2, voltage_max[2]); | |
261 | show(IN, in_max3, voltage_max[3]); | |
262 | show(RAW, alarms, alarms); | |
263 | show(BOOL, beep_enable, beep_enable); | |
264 | show(BEEP_MASK, beep_mask, beep_mask); | |
265 | ||
266 | static ssize_t show_fan_input(struct device *dev, | |
267 | struct device_attribute *attr, char *buf) | |
268 | { | |
269 | int nr = to_sensor_dev_attr(attr)->index; | |
270 | struct gl518_data *data = gl518_update_device(dev); | |
271 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr], | |
272 | DIV_FROM_REG(data->fan_div[nr]))); | |
273 | } | |
274 | ||
275 | static ssize_t show_fan_min(struct device *dev, | |
276 | struct device_attribute *attr, char *buf) | |
277 | { | |
278 | int nr = to_sensor_dev_attr(attr)->index; | |
279 | struct gl518_data *data = gl518_update_device(dev); | |
280 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], | |
281 | DIV_FROM_REG(data->fan_div[nr]))); | |
282 | } | |
283 | ||
284 | static ssize_t show_fan_div(struct device *dev, | |
285 | struct device_attribute *attr, char *buf) | |
286 | { | |
287 | int nr = to_sensor_dev_attr(attr)->index; | |
288 | struct gl518_data *data = gl518_update_device(dev); | |
289 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); | |
290 | } | |
291 | ||
292 | #define set(type, suffix, value, reg) \ | |
293 | static ssize_t set_##suffix(struct device *dev, \ | |
294 | struct device_attribute *attr, \ | |
295 | const char *buf, size_t count) \ | |
296 | { \ | |
297 | struct gl518_data *data = dev_get_drvdata(dev); \ | |
298 | struct i2c_client *client = data->client; \ | |
299 | long val; \ | |
300 | int err = kstrtol(buf, 10, &val); \ | |
301 | if (err) \ | |
302 | return err; \ | |
303 | \ | |
304 | mutex_lock(&data->update_lock); \ | |
305 | data->value = type##_TO_REG(val); \ | |
306 | gl518_write_value(client, reg, data->value); \ | |
307 | mutex_unlock(&data->update_lock); \ | |
308 | return count; \ | |
309 | } | |
310 | ||
311 | #define set_bits(type, suffix, value, reg, mask, shift) \ | |
312 | static ssize_t set_##suffix(struct device *dev, \ | |
313 | struct device_attribute *attr, \ | |
314 | const char *buf, size_t count) \ | |
315 | { \ | |
316 | struct gl518_data *data = dev_get_drvdata(dev); \ | |
317 | struct i2c_client *client = data->client; \ | |
318 | int regvalue; \ | |
319 | unsigned long val; \ | |
320 | int err = kstrtoul(buf, 10, &val); \ | |
321 | if (err) \ | |
322 | return err; \ | |
323 | \ | |
324 | mutex_lock(&data->update_lock); \ | |
325 | regvalue = gl518_read_value(client, reg); \ | |
326 | data->value = type##_TO_REG(val); \ | |
327 | regvalue = (regvalue & ~mask) | (data->value << shift); \ | |
328 | gl518_write_value(client, reg, regvalue); \ | |
329 | mutex_unlock(&data->update_lock); \ | |
330 | return count; \ | |
331 | } | |
332 | ||
333 | #define set_low(type, suffix, value, reg) \ | |
334 | set_bits(type, suffix, value, reg, 0x00ff, 0) | |
335 | #define set_high(type, suffix, value, reg) \ | |
336 | set_bits(type, suffix, value, reg, 0xff00, 8) | |
337 | ||
338 | set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX); | |
339 | set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST); | |
340 | set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3); | |
341 | set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT); | |
342 | set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT); | |
343 | set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT); | |
344 | set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT); | |
345 | set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT); | |
346 | set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT); | |
347 | set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT); | |
348 | set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT); | |
349 | set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2); | |
350 | set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM); | |
351 | ||
352 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, | |
353 | const char *buf, size_t count) | |
354 | { | |
355 | struct gl518_data *data = dev_get_drvdata(dev); | |
356 | struct i2c_client *client = data->client; | |
357 | int nr = to_sensor_dev_attr(attr)->index; | |
358 | int regvalue; | |
359 | unsigned long val; | |
360 | int err; | |
361 | ||
362 | err = kstrtoul(buf, 10, &val); | |
363 | if (err) | |
364 | return err; | |
365 | ||
366 | mutex_lock(&data->update_lock); | |
367 | regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); | |
368 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); | |
369 | regvalue = (regvalue & (0xff << (8 * nr))) | |
370 | | (data->fan_min[nr] << (8 * (1 - nr))); | |
371 | gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); | |
372 | ||
373 | data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); | |
374 | if (data->fan_min[nr] == 0) | |
375 | data->alarm_mask &= ~(0x20 << nr); | |
376 | else | |
377 | data->alarm_mask |= (0x20 << nr); | |
378 | data->beep_mask &= data->alarm_mask; | |
379 | gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); | |
380 | ||
381 | mutex_unlock(&data->update_lock); | |
382 | return count; | |
383 | } | |
384 | ||
385 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, | |
386 | const char *buf, size_t count) | |
387 | { | |
388 | struct gl518_data *data = dev_get_drvdata(dev); | |
389 | struct i2c_client *client = data->client; | |
390 | int nr = to_sensor_dev_attr(attr)->index; | |
391 | int regvalue; | |
392 | unsigned long val; | |
393 | int err; | |
394 | ||
395 | err = kstrtoul(buf, 10, &val); | |
396 | if (err) | |
397 | return err; | |
398 | ||
399 | switch (val) { | |
400 | case 1: | |
401 | val = 0; | |
402 | break; | |
403 | case 2: | |
404 | val = 1; | |
405 | break; | |
406 | case 4: | |
407 | val = 2; | |
408 | break; | |
409 | case 8: | |
410 | val = 3; | |
411 | break; | |
412 | default: | |
413 | dev_err(dev, | |
414 | "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n", | |
415 | val); | |
416 | return -EINVAL; | |
417 | } | |
418 | ||
419 | mutex_lock(&data->update_lock); | |
420 | regvalue = gl518_read_value(client, GL518_REG_MISC); | |
421 | data->fan_div[nr] = val; | |
422 | regvalue = (regvalue & ~(0xc0 >> (2 * nr))) | |
423 | | (data->fan_div[nr] << (6 - 2 * nr)); | |
424 | gl518_write_value(client, GL518_REG_MISC, regvalue); | |
425 | mutex_unlock(&data->update_lock); | |
426 | return count; | |
427 | } | |
428 | ||
429 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); | |
430 | static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1); | |
431 | static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO, | |
432 | show_temp_hyst1, set_temp_hyst1); | |
433 | static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1); | |
434 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); | |
435 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); | |
436 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, | |
437 | show_fan_min, set_fan_min, 0); | |
438 | static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, | |
439 | show_fan_min, set_fan_min, 1); | |
440 | static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, | |
441 | show_fan_div, set_fan_div, 0); | |
442 | static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, | |
443 | show_fan_div, set_fan_div, 1); | |
444 | static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); | |
445 | static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); | |
446 | static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); | |
447 | static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); | |
448 | static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0); | |
449 | static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1); | |
450 | static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2); | |
451 | static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3); | |
452 | static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0); | |
453 | static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1); | |
454 | static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2); | |
455 | static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3); | |
456 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
457 | static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO, | |
458 | show_beep_enable, set_beep_enable); | |
459 | static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO, | |
460 | show_beep_mask, set_beep_mask); | |
461 | ||
462 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, | |
463 | char *buf) | |
464 | { | |
465 | int bitnr = to_sensor_dev_attr(attr)->index; | |
466 | struct gl518_data *data = gl518_update_device(dev); | |
467 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
468 | } | |
469 | ||
470 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
471 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
472 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
473 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
474 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
475 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5); | |
476 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6); | |
477 | ||
478 | static ssize_t show_beep(struct device *dev, struct device_attribute *attr, | |
479 | char *buf) | |
480 | { | |
481 | int bitnr = to_sensor_dev_attr(attr)->index; | |
482 | struct gl518_data *data = gl518_update_device(dev); | |
483 | return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1); | |
484 | } | |
485 | ||
486 | static ssize_t set_beep(struct device *dev, struct device_attribute *attr, | |
487 | const char *buf, size_t count) | |
488 | { | |
489 | struct gl518_data *data = dev_get_drvdata(dev); | |
490 | struct i2c_client *client = data->client; | |
491 | int bitnr = to_sensor_dev_attr(attr)->index; | |
492 | unsigned long bit; | |
493 | int err; | |
494 | ||
495 | err = kstrtoul(buf, 10, &bit); | |
496 | if (err) | |
497 | return err; | |
498 | ||
499 | if (bit & ~1) | |
500 | return -EINVAL; | |
501 | ||
502 | mutex_lock(&data->update_lock); | |
503 | data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); | |
504 | if (bit) | |
505 | data->beep_mask |= (1 << bitnr); | |
506 | else | |
507 | data->beep_mask &= ~(1 << bitnr); | |
508 | gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); | |
509 | mutex_unlock(&data->update_lock); | |
510 | return count; | |
511 | } | |
512 | ||
513 | static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0); | |
514 | static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1); | |
515 | static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2); | |
516 | static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3); | |
517 | static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4); | |
518 | static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5); | |
519 | static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6); | |
520 | ||
521 | static struct attribute *gl518_attributes[] = { | |
522 | &dev_attr_in3_input.attr, | |
523 | &dev_attr_in0_min.attr, | |
524 | &dev_attr_in1_min.attr, | |
525 | &dev_attr_in2_min.attr, | |
526 | &dev_attr_in3_min.attr, | |
527 | &dev_attr_in0_max.attr, | |
528 | &dev_attr_in1_max.attr, | |
529 | &dev_attr_in2_max.attr, | |
530 | &dev_attr_in3_max.attr, | |
531 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
532 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
533 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
534 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
535 | &sensor_dev_attr_in0_beep.dev_attr.attr, | |
536 | &sensor_dev_attr_in1_beep.dev_attr.attr, | |
537 | &sensor_dev_attr_in2_beep.dev_attr.attr, | |
538 | &sensor_dev_attr_in3_beep.dev_attr.attr, | |
539 | ||
540 | &dev_attr_fan1_auto.attr, | |
541 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
542 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
543 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
544 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
545 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
546 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
547 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, | |
548 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, | |
549 | &sensor_dev_attr_fan1_beep.dev_attr.attr, | |
550 | &sensor_dev_attr_fan2_beep.dev_attr.attr, | |
551 | ||
552 | &dev_attr_temp1_input.attr, | |
553 | &dev_attr_temp1_max.attr, | |
554 | &dev_attr_temp1_max_hyst.attr, | |
555 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, | |
556 | &sensor_dev_attr_temp1_beep.dev_attr.attr, | |
557 | ||
558 | &dev_attr_alarms.attr, | |
559 | &dev_attr_beep_enable.attr, | |
560 | &dev_attr_beep_mask.attr, | |
561 | NULL | |
562 | }; | |
563 | ||
564 | static const struct attribute_group gl518_group = { | |
565 | .attrs = gl518_attributes, | |
566 | }; | |
567 | ||
568 | static struct attribute *gl518_attributes_r80[] = { | |
569 | &dev_attr_in0_input.attr, | |
570 | &dev_attr_in1_input.attr, | |
571 | &dev_attr_in2_input.attr, | |
572 | NULL | |
573 | }; | |
574 | ||
575 | static const struct attribute_group gl518_group_r80 = { | |
576 | .attrs = gl518_attributes_r80, | |
577 | }; | |
578 | ||
579 | /* | |
580 | * Real code | |
581 | */ | |
582 | ||
583 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
584 | static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info) | |
585 | { | |
586 | struct i2c_adapter *adapter = client->adapter; | |
587 | int rev; | |
588 | ||
589 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | | |
590 | I2C_FUNC_SMBUS_WORD_DATA)) | |
591 | return -ENODEV; | |
592 | ||
593 | /* Now, we do the remaining detection. */ | |
594 | if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80) | |
595 | || (gl518_read_value(client, GL518_REG_CONF) & 0x80)) | |
596 | return -ENODEV; | |
597 | ||
598 | /* Determine the chip type. */ | |
599 | rev = gl518_read_value(client, GL518_REG_REVISION); | |
600 | if (rev != 0x00 && rev != 0x80) | |
601 | return -ENODEV; | |
602 | ||
603 | strlcpy(info->type, "gl518sm", I2C_NAME_SIZE); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
608 | /* | |
609 | * Called when we have found a new GL518SM. | |
610 | * Note that we preserve D4:NoFan2 and D2:beep_enable. | |
611 | */ | |
612 | static void gl518_init_client(struct i2c_client *client) | |
613 | { | |
614 | /* Make sure we leave D7:Reset untouched */ | |
615 | u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f; | |
616 | ||
617 | /* Comparator mode (D3=0), standby mode (D6=0) */ | |
618 | gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37)); | |
619 | ||
620 | /* Never interrupts */ | |
621 | gl518_write_value(client, GL518_REG_MASK, 0x00); | |
622 | ||
623 | /* Clear status register (D5=1), start (D6=1) */ | |
624 | gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue); | |
625 | gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue); | |
626 | } | |
627 | ||
628 | static int gl518_probe(struct i2c_client *client, | |
629 | const struct i2c_device_id *id) | |
630 | { | |
631 | struct device *dev = &client->dev; | |
632 | struct device *hwmon_dev; | |
633 | struct gl518_data *data; | |
634 | int revision; | |
635 | ||
636 | data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL); | |
637 | if (!data) | |
638 | return -ENOMEM; | |
639 | ||
640 | data->client = client; | |
641 | revision = gl518_read_value(client, GL518_REG_REVISION); | |
642 | data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00; | |
643 | mutex_init(&data->update_lock); | |
644 | ||
645 | /* Initialize the GL518SM chip */ | |
646 | data->alarm_mask = 0xff; | |
647 | gl518_init_client(client); | |
648 | ||
649 | /* sysfs hooks */ | |
650 | data->groups[0] = &gl518_group; | |
651 | if (data->type == gl518sm_r80) | |
652 | data->groups[1] = &gl518_group_r80; | |
653 | ||
654 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, | |
655 | data, data->groups); | |
656 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
657 | } | |
658 | ||
659 | static const struct i2c_device_id gl518_id[] = { | |
660 | { "gl518sm", 0 }, | |
661 | { } | |
662 | }; | |
663 | MODULE_DEVICE_TABLE(i2c, gl518_id); | |
664 | ||
665 | static struct i2c_driver gl518_driver = { | |
666 | .class = I2C_CLASS_HWMON, | |
667 | .driver = { | |
668 | .name = "gl518sm", | |
669 | }, | |
670 | .probe = gl518_probe, | |
671 | .id_table = gl518_id, | |
672 | .detect = gl518_detect, | |
673 | .address_list = normal_i2c, | |
674 | }; | |
675 | ||
676 | module_i2c_driver(gl518_driver); | |
677 | ||
678 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " | |
679 | "Kyosti Malkki <kmalkki@cc.hut.fi> and " | |
680 | "Hong-Gunn Chew <hglinux@gunnet.org>"); | |
681 | MODULE_DESCRIPTION("GL518SM driver"); | |
682 | MODULE_LICENSE("GPL"); |