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1da177e4 LT |
1 | /* |
2 | lm78.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | monitoring | |
4 | Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/init.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/jiffies.h> | |
25 | #include <linux/i2c.h> | |
26 | #include <linux/i2c-sensor.h> | |
27 | #include <asm/io.h> | |
28 | ||
29 | /* Addresses to scan */ | |
30 | static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24, | |
31 | 0x25, 0x26, 0x27, 0x28, 0x29, | |
32 | 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, | |
33 | 0x2f, I2C_CLIENT_END }; | |
34 | static unsigned int normal_isa[] = { 0x0290, I2C_CLIENT_ISA_END }; | |
35 | ||
36 | /* Insmod parameters */ | |
37 | SENSORS_INSMOD_3(lm78, lm78j, lm79); | |
38 | ||
39 | /* Many LM78 constants specified below */ | |
40 | ||
41 | /* Length of ISA address segment */ | |
42 | #define LM78_EXTENT 8 | |
43 | ||
44 | /* Where are the ISA address/data registers relative to the base address */ | |
45 | #define LM78_ADDR_REG_OFFSET 5 | |
46 | #define LM78_DATA_REG_OFFSET 6 | |
47 | ||
48 | /* The LM78 registers */ | |
49 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
50 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
51 | #define LM78_REG_IN(nr) (0x20 + (nr)) | |
52 | ||
53 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) | |
54 | #define LM78_REG_FAN(nr) (0x28 + (nr)) | |
55 | ||
56 | #define LM78_REG_TEMP 0x27 | |
57 | #define LM78_REG_TEMP_OVER 0x39 | |
58 | #define LM78_REG_TEMP_HYST 0x3a | |
59 | ||
60 | #define LM78_REG_ALARM1 0x41 | |
61 | #define LM78_REG_ALARM2 0x42 | |
62 | ||
63 | #define LM78_REG_VID_FANDIV 0x47 | |
64 | ||
65 | #define LM78_REG_CONFIG 0x40 | |
66 | #define LM78_REG_CHIPID 0x49 | |
67 | #define LM78_REG_I2C_ADDR 0x48 | |
68 | ||
69 | ||
70 | /* Conversions. Rounding and limit checking is only done on the TO_REG | |
71 | variants. */ | |
72 | ||
73 | /* IN: mV, (0V to 4.08V) | |
74 | REG: 16mV/bit */ | |
75 | static inline u8 IN_TO_REG(unsigned long val) | |
76 | { | |
77 | unsigned long nval = SENSORS_LIMIT(val, 0, 4080); | |
78 | return (nval + 8) / 16; | |
79 | } | |
80 | #define IN_FROM_REG(val) ((val) * 16) | |
81 | ||
82 | static inline u8 FAN_TO_REG(long rpm, int div) | |
83 | { | |
84 | if (rpm <= 0) | |
85 | return 255; | |
86 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
87 | } | |
88 | ||
89 | static inline int FAN_FROM_REG(u8 val, int div) | |
90 | { | |
91 | return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); | |
92 | } | |
93 | ||
94 | /* TEMP: mC (-128C to +127C) | |
95 | REG: 1C/bit, two's complement */ | |
96 | static inline s8 TEMP_TO_REG(int val) | |
97 | { | |
98 | int nval = SENSORS_LIMIT(val, -128000, 127000) ; | |
99 | return nval<0 ? (nval-500)/1000 : (nval+500)/1000; | |
100 | } | |
101 | ||
102 | static inline int TEMP_FROM_REG(s8 val) | |
103 | { | |
104 | return val * 1000; | |
105 | } | |
106 | ||
107 | /* VID: mV | |
108 | REG: (see doc/vid) */ | |
109 | static inline int VID_FROM_REG(u8 val) | |
110 | { | |
111 | return val==0x1f ? 0 : val>=0x10 ? 5100-val*100 : 2050-val*50; | |
112 | } | |
113 | ||
114 | #define DIV_FROM_REG(val) (1 << (val)) | |
115 | ||
116 | /* There are some complications in a module like this. First off, LM78 chips | |
117 | may be both present on the SMBus and the ISA bus, and we have to handle | |
118 | those cases separately at some places. Second, there might be several | |
119 | LM78 chips available (well, actually, that is probably never done; but | |
120 | it is a clean illustration of how to handle a case like that). Finally, | |
121 | a specific chip may be attached to *both* ISA and SMBus, and we would | |
122 | not like to detect it double. Fortunately, in the case of the LM78 at | |
123 | least, a register tells us what SMBus address we are on, so that helps | |
124 | a bit - except if there could be more than one SMBus. Groan. No solution | |
125 | for this yet. */ | |
126 | ||
127 | /* This module may seem overly long and complicated. In fact, it is not so | |
128 | bad. Quite a lot of bookkeeping is done. A real driver can often cut | |
129 | some corners. */ | |
130 | ||
131 | /* For each registered LM78, we need to keep some data in memory. That | |
132 | data is pointed to by lm78_list[NR]->data. The structure itself is | |
133 | dynamically allocated, at the same time when a new lm78 client is | |
134 | allocated. */ | |
135 | struct lm78_data { | |
136 | struct i2c_client client; | |
137 | struct semaphore lock; | |
138 | enum chips type; | |
139 | ||
140 | struct semaphore update_lock; | |
141 | char valid; /* !=0 if following fields are valid */ | |
142 | unsigned long last_updated; /* In jiffies */ | |
143 | ||
144 | u8 in[7]; /* Register value */ | |
145 | u8 in_max[7]; /* Register value */ | |
146 | u8 in_min[7]; /* Register value */ | |
147 | u8 fan[3]; /* Register value */ | |
148 | u8 fan_min[3]; /* Register value */ | |
149 | s8 temp; /* Register value */ | |
150 | s8 temp_over; /* Register value */ | |
151 | s8 temp_hyst; /* Register value */ | |
152 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
153 | u8 vid; /* Register encoding, combined */ | |
154 | u16 alarms; /* Register encoding, combined */ | |
155 | }; | |
156 | ||
157 | ||
158 | static int lm78_attach_adapter(struct i2c_adapter *adapter); | |
159 | static int lm78_detect(struct i2c_adapter *adapter, int address, int kind); | |
160 | static int lm78_detach_client(struct i2c_client *client); | |
161 | ||
162 | static int lm78_read_value(struct i2c_client *client, u8 register); | |
163 | static int lm78_write_value(struct i2c_client *client, u8 register, u8 value); | |
164 | static struct lm78_data *lm78_update_device(struct device *dev); | |
165 | static void lm78_init_client(struct i2c_client *client); | |
166 | ||
167 | ||
168 | static struct i2c_driver lm78_driver = { | |
169 | .owner = THIS_MODULE, | |
170 | .name = "lm78", | |
171 | .id = I2C_DRIVERID_LM78, | |
172 | .flags = I2C_DF_NOTIFY, | |
173 | .attach_adapter = lm78_attach_adapter, | |
174 | .detach_client = lm78_detach_client, | |
175 | }; | |
176 | ||
177 | /* 7 Voltages */ | |
178 | static ssize_t show_in(struct device *dev, char *buf, int nr) | |
179 | { | |
180 | struct lm78_data *data = lm78_update_device(dev); | |
181 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); | |
182 | } | |
183 | ||
184 | static ssize_t show_in_min(struct device *dev, char *buf, int nr) | |
185 | { | |
186 | struct lm78_data *data = lm78_update_device(dev); | |
187 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); | |
188 | } | |
189 | ||
190 | static ssize_t show_in_max(struct device *dev, char *buf, int nr) | |
191 | { | |
192 | struct lm78_data *data = lm78_update_device(dev); | |
193 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); | |
194 | } | |
195 | ||
196 | static ssize_t set_in_min(struct device *dev, const char *buf, | |
197 | size_t count, int nr) | |
198 | { | |
199 | struct i2c_client *client = to_i2c_client(dev); | |
200 | struct lm78_data *data = i2c_get_clientdata(client); | |
201 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
202 | ||
203 | down(&data->update_lock); | |
204 | data->in_min[nr] = IN_TO_REG(val); | |
205 | lm78_write_value(client, LM78_REG_IN_MIN(nr), data->in_min[nr]); | |
206 | up(&data->update_lock); | |
207 | return count; | |
208 | } | |
209 | ||
210 | static ssize_t set_in_max(struct device *dev, const char *buf, | |
211 | size_t count, int nr) | |
212 | { | |
213 | struct i2c_client *client = to_i2c_client(dev); | |
214 | struct lm78_data *data = i2c_get_clientdata(client); | |
215 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
216 | ||
217 | down(&data->update_lock); | |
218 | data->in_max[nr] = IN_TO_REG(val); | |
219 | lm78_write_value(client, LM78_REG_IN_MAX(nr), data->in_max[nr]); | |
220 | up(&data->update_lock); | |
221 | return count; | |
222 | } | |
223 | ||
224 | #define show_in_offset(offset) \ | |
225 | static ssize_t \ | |
8627f9ba | 226 | show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
227 | { \ |
228 | return show_in(dev, buf, offset); \ | |
229 | } \ | |
230 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, \ | |
231 | show_in##offset, NULL); \ | |
232 | static ssize_t \ | |
8627f9ba | 233 | show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
234 | { \ |
235 | return show_in_min(dev, buf, offset); \ | |
236 | } \ | |
237 | static ssize_t \ | |
8627f9ba | 238 | show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
239 | { \ |
240 | return show_in_max(dev, buf, offset); \ | |
241 | } \ | |
8627f9ba | 242 | static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
243 | const char *buf, size_t count) \ |
244 | { \ | |
245 | return set_in_min(dev, buf, count, offset); \ | |
246 | } \ | |
8627f9ba | 247 | static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
248 | const char *buf, size_t count) \ |
249 | { \ | |
250 | return set_in_max(dev, buf, count, offset); \ | |
251 | } \ | |
252 | static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
253 | show_in##offset##_min, set_in##offset##_min); \ | |
254 | static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
255 | show_in##offset##_max, set_in##offset##_max); | |
256 | ||
257 | show_in_offset(0); | |
258 | show_in_offset(1); | |
259 | show_in_offset(2); | |
260 | show_in_offset(3); | |
261 | show_in_offset(4); | |
262 | show_in_offset(5); | |
263 | show_in_offset(6); | |
264 | ||
265 | /* Temperature */ | |
8627f9ba | 266 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
267 | { |
268 | struct lm78_data *data = lm78_update_device(dev); | |
269 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
270 | } | |
271 | ||
8627f9ba | 272 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
273 | { |
274 | struct lm78_data *data = lm78_update_device(dev); | |
275 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
276 | } | |
277 | ||
8627f9ba | 278 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
279 | { |
280 | struct i2c_client *client = to_i2c_client(dev); | |
281 | struct lm78_data *data = i2c_get_clientdata(client); | |
282 | long val = simple_strtol(buf, NULL, 10); | |
283 | ||
284 | down(&data->update_lock); | |
285 | data->temp_over = TEMP_TO_REG(val); | |
286 | lm78_write_value(client, LM78_REG_TEMP_OVER, data->temp_over); | |
287 | up(&data->update_lock); | |
288 | return count; | |
289 | } | |
290 | ||
8627f9ba | 291 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
292 | { |
293 | struct lm78_data *data = lm78_update_device(dev); | |
294 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
295 | } | |
296 | ||
8627f9ba | 297 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
298 | { |
299 | struct i2c_client *client = to_i2c_client(dev); | |
300 | struct lm78_data *data = i2c_get_clientdata(client); | |
301 | long val = simple_strtol(buf, NULL, 10); | |
302 | ||
303 | down(&data->update_lock); | |
304 | data->temp_hyst = TEMP_TO_REG(val); | |
305 | lm78_write_value(client, LM78_REG_TEMP_HYST, data->temp_hyst); | |
306 | up(&data->update_lock); | |
307 | return count; | |
308 | } | |
309 | ||
310 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
311 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, | |
312 | show_temp_over, set_temp_over); | |
313 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
314 | show_temp_hyst, set_temp_hyst); | |
315 | ||
316 | /* 3 Fans */ | |
317 | static ssize_t show_fan(struct device *dev, char *buf, int nr) | |
318 | { | |
319 | struct lm78_data *data = lm78_update_device(dev); | |
320 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], | |
321 | DIV_FROM_REG(data->fan_div[nr])) ); | |
322 | } | |
323 | ||
324 | static ssize_t show_fan_min(struct device *dev, char *buf, int nr) | |
325 | { | |
326 | struct lm78_data *data = lm78_update_device(dev); | |
327 | return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr], | |
328 | DIV_FROM_REG(data->fan_div[nr])) ); | |
329 | } | |
330 | ||
331 | static ssize_t set_fan_min(struct device *dev, const char *buf, | |
332 | size_t count, int nr) | |
333 | { | |
334 | struct i2c_client *client = to_i2c_client(dev); | |
335 | struct lm78_data *data = i2c_get_clientdata(client); | |
336 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
337 | ||
338 | down(&data->update_lock); | |
339 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); | |
340 | lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); | |
341 | up(&data->update_lock); | |
342 | return count; | |
343 | } | |
344 | ||
345 | static ssize_t show_fan_div(struct device *dev, char *buf, int nr) | |
346 | { | |
347 | struct lm78_data *data = lm78_update_device(dev); | |
348 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); | |
349 | } | |
350 | ||
351 | /* Note: we save and restore the fan minimum here, because its value is | |
352 | determined in part by the fan divisor. This follows the principle of | |
353 | least suprise; the user doesn't expect the fan minimum to change just | |
354 | because the divisor changed. */ | |
355 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
356 | size_t count, int nr) | |
357 | { | |
358 | struct i2c_client *client = to_i2c_client(dev); | |
359 | struct lm78_data *data = i2c_get_clientdata(client); | |
360 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
361 | unsigned long min; | |
362 | u8 reg; | |
363 | ||
364 | down(&data->update_lock); | |
365 | min = FAN_FROM_REG(data->fan_min[nr], | |
366 | DIV_FROM_REG(data->fan_div[nr])); | |
367 | ||
368 | switch (val) { | |
369 | case 1: data->fan_div[nr] = 0; break; | |
370 | case 2: data->fan_div[nr] = 1; break; | |
371 | case 4: data->fan_div[nr] = 2; break; | |
372 | case 8: data->fan_div[nr] = 3; break; | |
373 | default: | |
374 | dev_err(&client->dev, "fan_div value %ld not " | |
375 | "supported. Choose one of 1, 2, 4 or 8!\n", val); | |
376 | up(&data->update_lock); | |
377 | return -EINVAL; | |
378 | } | |
379 | ||
380 | reg = lm78_read_value(client, LM78_REG_VID_FANDIV); | |
381 | switch (nr) { | |
382 | case 0: | |
383 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
384 | break; | |
385 | case 1: | |
386 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
387 | break; | |
388 | } | |
389 | lm78_write_value(client, LM78_REG_VID_FANDIV, reg); | |
390 | ||
391 | data->fan_min[nr] = | |
392 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
393 | lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); | |
394 | up(&data->update_lock); | |
395 | ||
396 | return count; | |
397 | } | |
398 | ||
399 | #define show_fan_offset(offset) \ | |
8627f9ba | 400 | static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
401 | { \ |
402 | return show_fan(dev, buf, offset - 1); \ | |
403 | } \ | |
8627f9ba | 404 | static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
405 | { \ |
406 | return show_fan_min(dev, buf, offset - 1); \ | |
407 | } \ | |
8627f9ba | 408 | static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
409 | { \ |
410 | return show_fan_div(dev, buf, offset - 1); \ | |
411 | } \ | |
8627f9ba | 412 | static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
413 | const char *buf, size_t count) \ |
414 | { \ | |
415 | return set_fan_min(dev, buf, count, offset - 1); \ | |
416 | } \ | |
417 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\ | |
418 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
419 | show_fan_##offset##_min, set_fan_##offset##_min); | |
420 | ||
8627f9ba | 421 | static ssize_t set_fan_1_div(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
422 | size_t count) |
423 | { | |
424 | return set_fan_div(dev, buf, count, 0) ; | |
425 | } | |
426 | ||
8627f9ba | 427 | static ssize_t set_fan_2_div(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
428 | size_t count) |
429 | { | |
430 | return set_fan_div(dev, buf, count, 1) ; | |
431 | } | |
432 | ||
433 | show_fan_offset(1); | |
434 | show_fan_offset(2); | |
435 | show_fan_offset(3); | |
436 | ||
437 | /* Fan 3 divisor is locked in H/W */ | |
438 | static DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, | |
439 | show_fan_1_div, set_fan_1_div); | |
440 | static DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
441 | show_fan_2_div, set_fan_2_div); | |
442 | static DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_3_div, NULL); | |
443 | ||
444 | /* VID */ | |
8627f9ba | 445 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
446 | { |
447 | struct lm78_data *data = lm78_update_device(dev); | |
448 | return sprintf(buf, "%d\n", VID_FROM_REG(data->vid)); | |
449 | } | |
450 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
451 | ||
452 | /* Alarms */ | |
8627f9ba | 453 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
454 | { |
455 | struct lm78_data *data = lm78_update_device(dev); | |
456 | return sprintf(buf, "%u\n", data->alarms); | |
457 | } | |
458 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
459 | ||
460 | /* This function is called when: | |
461 | * lm78_driver is inserted (when this module is loaded), for each | |
462 | available adapter | |
463 | * when a new adapter is inserted (and lm78_driver is still present) */ | |
464 | static int lm78_attach_adapter(struct i2c_adapter *adapter) | |
465 | { | |
466 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
467 | return 0; | |
468 | return i2c_detect(adapter, &addr_data, lm78_detect); | |
469 | } | |
470 | ||
471 | /* This function is called by i2c_detect */ | |
472 | int lm78_detect(struct i2c_adapter *adapter, int address, int kind) | |
473 | { | |
474 | int i, err; | |
475 | struct i2c_client *new_client; | |
476 | struct lm78_data *data; | |
477 | const char *client_name = ""; | |
478 | int is_isa = i2c_is_isa_adapter(adapter); | |
479 | ||
480 | if (!is_isa && | |
481 | !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
482 | err = -ENODEV; | |
483 | goto ERROR0; | |
484 | } | |
485 | ||
486 | /* Reserve the ISA region */ | |
487 | if (is_isa) | |
488 | if (!request_region(address, LM78_EXTENT, lm78_driver.name)) { | |
489 | err = -EBUSY; | |
490 | goto ERROR0; | |
491 | } | |
492 | ||
493 | /* Probe whether there is anything available on this address. Already | |
494 | done for SMBus clients */ | |
495 | if (kind < 0) { | |
496 | if (is_isa) { | |
497 | ||
498 | #define REALLY_SLOW_IO | |
499 | /* We need the timeouts for at least some LM78-like | |
500 | chips. But only if we read 'undefined' registers. */ | |
501 | i = inb_p(address + 1); | |
502 | if (inb_p(address + 2) != i) { | |
503 | err = -ENODEV; | |
504 | goto ERROR1; | |
505 | } | |
506 | if (inb_p(address + 3) != i) { | |
507 | err = -ENODEV; | |
508 | goto ERROR1; | |
509 | } | |
510 | if (inb_p(address + 7) != i) { | |
511 | err = -ENODEV; | |
512 | goto ERROR1; | |
513 | } | |
514 | #undef REALLY_SLOW_IO | |
515 | ||
516 | /* Let's just hope nothing breaks here */ | |
517 | i = inb_p(address + 5) & 0x7f; | |
518 | outb_p(~i & 0x7f, address + 5); | |
519 | if ((inb_p(address + 5) & 0x7f) != (~i & 0x7f)) { | |
520 | outb_p(i, address + 5); | |
521 | err = -ENODEV; | |
522 | goto ERROR1; | |
523 | } | |
524 | } | |
525 | } | |
526 | ||
527 | /* OK. For now, we presume we have a valid client. We now create the | |
528 | client structure, even though we cannot fill it completely yet. | |
529 | But it allows us to access lm78_{read,write}_value. */ | |
530 | ||
531 | if (!(data = kmalloc(sizeof(struct lm78_data), GFP_KERNEL))) { | |
532 | err = -ENOMEM; | |
533 | goto ERROR1; | |
534 | } | |
535 | memset(data, 0, sizeof(struct lm78_data)); | |
536 | ||
537 | new_client = &data->client; | |
538 | if (is_isa) | |
539 | init_MUTEX(&data->lock); | |
540 | i2c_set_clientdata(new_client, data); | |
541 | new_client->addr = address; | |
542 | new_client->adapter = adapter; | |
543 | new_client->driver = &lm78_driver; | |
544 | new_client->flags = 0; | |
545 | ||
546 | /* Now, we do the remaining detection. */ | |
547 | if (kind < 0) { | |
548 | if (lm78_read_value(new_client, LM78_REG_CONFIG) & 0x80) { | |
549 | err = -ENODEV; | |
550 | goto ERROR2; | |
551 | } | |
552 | if (!is_isa && (lm78_read_value( | |
553 | new_client, LM78_REG_I2C_ADDR) != address)) { | |
554 | err = -ENODEV; | |
555 | goto ERROR2; | |
556 | } | |
557 | } | |
558 | ||
559 | /* Determine the chip type. */ | |
560 | if (kind <= 0) { | |
561 | i = lm78_read_value(new_client, LM78_REG_CHIPID); | |
562 | if (i == 0x00 || i == 0x20) | |
563 | kind = lm78; | |
564 | else if (i == 0x40) | |
565 | kind = lm78j; | |
566 | else if ((i & 0xfe) == 0xc0) | |
567 | kind = lm79; | |
568 | else { | |
569 | if (kind == 0) | |
570 | dev_warn(&adapter->dev, "Ignoring 'force' " | |
571 | "parameter for unknown chip at " | |
572 | "adapter %d, address 0x%02x\n", | |
573 | i2c_adapter_id(adapter), address); | |
574 | err = -ENODEV; | |
575 | goto ERROR2; | |
576 | } | |
577 | } | |
578 | ||
579 | if (kind == lm78) { | |
580 | client_name = "lm78"; | |
581 | } else if (kind == lm78j) { | |
582 | client_name = "lm78-j"; | |
583 | } else if (kind == lm79) { | |
584 | client_name = "lm79"; | |
585 | } | |
586 | ||
587 | /* Fill in the remaining client fields and put into the global list */ | |
588 | strlcpy(new_client->name, client_name, I2C_NAME_SIZE); | |
589 | data->type = kind; | |
590 | ||
591 | data->valid = 0; | |
592 | init_MUTEX(&data->update_lock); | |
593 | ||
594 | /* Tell the I2C layer a new client has arrived */ | |
595 | if ((err = i2c_attach_client(new_client))) | |
596 | goto ERROR2; | |
597 | ||
598 | /* Initialize the LM78 chip */ | |
599 | lm78_init_client(new_client); | |
600 | ||
601 | /* A few vars need to be filled upon startup */ | |
602 | for (i = 0; i < 3; i++) { | |
603 | data->fan_min[i] = lm78_read_value(new_client, | |
604 | LM78_REG_FAN_MIN(i)); | |
605 | } | |
606 | ||
607 | /* Register sysfs hooks */ | |
608 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
609 | device_create_file(&new_client->dev, &dev_attr_in0_min); | |
610 | device_create_file(&new_client->dev, &dev_attr_in0_max); | |
611 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
612 | device_create_file(&new_client->dev, &dev_attr_in1_min); | |
613 | device_create_file(&new_client->dev, &dev_attr_in1_max); | |
614 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
615 | device_create_file(&new_client->dev, &dev_attr_in2_min); | |
616 | device_create_file(&new_client->dev, &dev_attr_in2_max); | |
617 | device_create_file(&new_client->dev, &dev_attr_in3_input); | |
618 | device_create_file(&new_client->dev, &dev_attr_in3_min); | |
619 | device_create_file(&new_client->dev, &dev_attr_in3_max); | |
620 | device_create_file(&new_client->dev, &dev_attr_in4_input); | |
621 | device_create_file(&new_client->dev, &dev_attr_in4_min); | |
622 | device_create_file(&new_client->dev, &dev_attr_in4_max); | |
623 | device_create_file(&new_client->dev, &dev_attr_in5_input); | |
624 | device_create_file(&new_client->dev, &dev_attr_in5_min); | |
625 | device_create_file(&new_client->dev, &dev_attr_in5_max); | |
626 | device_create_file(&new_client->dev, &dev_attr_in6_input); | |
627 | device_create_file(&new_client->dev, &dev_attr_in6_min); | |
628 | device_create_file(&new_client->dev, &dev_attr_in6_max); | |
629 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
630 | device_create_file(&new_client->dev, &dev_attr_temp1_max); | |
631 | device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); | |
632 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
633 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
634 | device_create_file(&new_client->dev, &dev_attr_fan1_div); | |
635 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
636 | device_create_file(&new_client->dev, &dev_attr_fan2_min); | |
637 | device_create_file(&new_client->dev, &dev_attr_fan2_div); | |
638 | device_create_file(&new_client->dev, &dev_attr_fan3_input); | |
639 | device_create_file(&new_client->dev, &dev_attr_fan3_min); | |
640 | device_create_file(&new_client->dev, &dev_attr_fan3_div); | |
641 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
642 | device_create_file(&new_client->dev, &dev_attr_cpu0_vid); | |
643 | ||
644 | return 0; | |
645 | ||
646 | ERROR2: | |
647 | kfree(data); | |
648 | ERROR1: | |
649 | if (is_isa) | |
650 | release_region(address, LM78_EXTENT); | |
651 | ERROR0: | |
652 | return err; | |
653 | } | |
654 | ||
655 | static int lm78_detach_client(struct i2c_client *client) | |
656 | { | |
657 | int err; | |
658 | ||
659 | if ((err = i2c_detach_client(client))) { | |
660 | dev_err(&client->dev, | |
661 | "Client deregistration failed, client not detached.\n"); | |
662 | return err; | |
663 | } | |
664 | ||
665 | if(i2c_is_isa_client(client)) | |
666 | release_region(client->addr, LM78_EXTENT); | |
667 | ||
668 | kfree(i2c_get_clientdata(client)); | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
44bbe87e | 673 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
1da177e4 LT |
674 | We don't want to lock the whole ISA bus, so we lock each client |
675 | separately. | |
676 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
677 | would slow down the LM78 access and should not be necessary. */ | |
678 | static int lm78_read_value(struct i2c_client *client, u8 reg) | |
679 | { | |
680 | int res; | |
681 | if (i2c_is_isa_client(client)) { | |
682 | struct lm78_data *data = i2c_get_clientdata(client); | |
683 | down(&data->lock); | |
684 | outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET); | |
685 | res = inb_p(client->addr + LM78_DATA_REG_OFFSET); | |
686 | up(&data->lock); | |
687 | return res; | |
688 | } else | |
689 | return i2c_smbus_read_byte_data(client, reg); | |
690 | } | |
691 | ||
44bbe87e | 692 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
1da177e4 LT |
693 | We don't want to lock the whole ISA bus, so we lock each client |
694 | separately. | |
695 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
696 | would slow down the LM78 access and should not be necessary. | |
697 | There are some ugly typecasts here, but the good new is - they should | |
698 | nowhere else be necessary! */ | |
699 | static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value) | |
700 | { | |
701 | if (i2c_is_isa_client(client)) { | |
702 | struct lm78_data *data = i2c_get_clientdata(client); | |
703 | down(&data->lock); | |
704 | outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET); | |
705 | outb_p(value, client->addr + LM78_DATA_REG_OFFSET); | |
706 | up(&data->lock); | |
707 | return 0; | |
708 | } else | |
709 | return i2c_smbus_write_byte_data(client, reg, value); | |
710 | } | |
711 | ||
712 | /* Called when we have found a new LM78. It should set limits, etc. */ | |
713 | static void lm78_init_client(struct i2c_client *client) | |
714 | { | |
715 | u8 config = lm78_read_value(client, LM78_REG_CONFIG); | |
716 | ||
717 | /* Start monitoring */ | |
718 | if (!(config & 0x01)) | |
719 | lm78_write_value(client, LM78_REG_CONFIG, | |
720 | (config & 0xf7) | 0x01); | |
721 | } | |
722 | ||
723 | static struct lm78_data *lm78_update_device(struct device *dev) | |
724 | { | |
725 | struct i2c_client *client = to_i2c_client(dev); | |
726 | struct lm78_data *data = i2c_get_clientdata(client); | |
727 | int i; | |
728 | ||
729 | down(&data->update_lock); | |
730 | ||
731 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
732 | || !data->valid) { | |
733 | ||
734 | dev_dbg(&client->dev, "Starting lm78 update\n"); | |
735 | ||
736 | for (i = 0; i <= 6; i++) { | |
737 | data->in[i] = | |
738 | lm78_read_value(client, LM78_REG_IN(i)); | |
739 | data->in_min[i] = | |
740 | lm78_read_value(client, LM78_REG_IN_MIN(i)); | |
741 | data->in_max[i] = | |
742 | lm78_read_value(client, LM78_REG_IN_MAX(i)); | |
743 | } | |
744 | for (i = 0; i < 3; i++) { | |
745 | data->fan[i] = | |
746 | lm78_read_value(client, LM78_REG_FAN(i)); | |
747 | data->fan_min[i] = | |
748 | lm78_read_value(client, LM78_REG_FAN_MIN(i)); | |
749 | } | |
750 | data->temp = lm78_read_value(client, LM78_REG_TEMP); | |
751 | data->temp_over = | |
752 | lm78_read_value(client, LM78_REG_TEMP_OVER); | |
753 | data->temp_hyst = | |
754 | lm78_read_value(client, LM78_REG_TEMP_HYST); | |
755 | i = lm78_read_value(client, LM78_REG_VID_FANDIV); | |
756 | data->vid = i & 0x0f; | |
757 | if (data->type == lm79) | |
758 | data->vid |= | |
759 | (lm78_read_value(client, LM78_REG_CHIPID) & | |
760 | 0x01) << 4; | |
761 | else | |
762 | data->vid |= 0x10; | |
763 | data->fan_div[0] = (i >> 4) & 0x03; | |
764 | data->fan_div[1] = i >> 6; | |
765 | data->alarms = lm78_read_value(client, LM78_REG_ALARM1) + | |
766 | (lm78_read_value(client, LM78_REG_ALARM2) << 8); | |
767 | data->last_updated = jiffies; | |
768 | data->valid = 1; | |
769 | ||
770 | data->fan_div[2] = 1; | |
771 | } | |
772 | ||
773 | up(&data->update_lock); | |
774 | ||
775 | return data; | |
776 | } | |
777 | ||
778 | static int __init sm_lm78_init(void) | |
779 | { | |
780 | return i2c_add_driver(&lm78_driver); | |
781 | } | |
782 | ||
783 | static void __exit sm_lm78_exit(void) | |
784 | { | |
785 | i2c_del_driver(&lm78_driver); | |
786 | } | |
787 | ||
788 | ||
789 | ||
790 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>"); | |
791 | MODULE_DESCRIPTION("LM78, LM78-J and LM79 driver"); | |
792 | MODULE_LICENSE("GPL"); | |
793 | ||
794 | module_init(sm_lm78_init); | |
795 | module_exit(sm_lm78_exit); |