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