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Commit | Line | Data |
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1da177e4 | 1 | /* |
9b03079f GR |
2 | * lm78.c - Part of lm_sensors, Linux kernel modules for hardware |
3 | * monitoring | |
4 | * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
7c81c60f | 5 | * Copyright (c) 2007, 2011 Jean Delvare <jdelvare@suse.de> |
9b03079f GR |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
1da177e4 | 21 | |
ce47da74 JP |
22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
23 | ||
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/i2c.h> | |
943b0830 | 29 | #include <linux/hwmon.h> |
19f673ed | 30 | #include <linux/hwmon-vid.h> |
247dde4c | 31 | #include <linux/hwmon-sysfs.h> |
943b0830 | 32 | #include <linux/err.h> |
9a61bf63 | 33 | #include <linux/mutex.h> |
1da177e4 | 34 | |
90534c5c JD |
35 | #ifdef CONFIG_ISA |
36 | #include <linux/platform_device.h> | |
37 | #include <linux/ioport.h> | |
38 | #include <linux/io.h> | |
39 | #endif | |
c40769fe | 40 | |
1da177e4 | 41 | /* Addresses to scan */ |
25e9c86d MH |
42 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
43 | 0x2e, 0x2f, I2C_CLIENT_END }; | |
e5e9f44c | 44 | enum chips { lm78, lm79 }; |
1da177e4 LT |
45 | |
46 | /* Many LM78 constants specified below */ | |
47 | ||
48 | /* Length of ISA address segment */ | |
49 | #define LM78_EXTENT 8 | |
50 | ||
51 | /* Where are the ISA address/data registers relative to the base address */ | |
52 | #define LM78_ADDR_REG_OFFSET 5 | |
53 | #define LM78_DATA_REG_OFFSET 6 | |
54 | ||
55 | /* The LM78 registers */ | |
56 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
57 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
58 | #define LM78_REG_IN(nr) (0x20 + (nr)) | |
59 | ||
60 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) | |
61 | #define LM78_REG_FAN(nr) (0x28 + (nr)) | |
62 | ||
63 | #define LM78_REG_TEMP 0x27 | |
64 | #define LM78_REG_TEMP_OVER 0x39 | |
65 | #define LM78_REG_TEMP_HYST 0x3a | |
66 | ||
67 | #define LM78_REG_ALARM1 0x41 | |
68 | #define LM78_REG_ALARM2 0x42 | |
69 | ||
70 | #define LM78_REG_VID_FANDIV 0x47 | |
71 | ||
72 | #define LM78_REG_CONFIG 0x40 | |
73 | #define LM78_REG_CHIPID 0x49 | |
74 | #define LM78_REG_I2C_ADDR 0x48 | |
75 | ||
76 | ||
9b03079f GR |
77 | /* |
78 | * Conversions. Rounding and limit checking is only done on the TO_REG | |
79 | * variants. | |
80 | */ | |
1da177e4 | 81 | |
9b03079f GR |
82 | /* |
83 | * IN: mV (0V to 4.08V) | |
84 | * REG: 16mV/bit | |
85 | */ | |
1da177e4 LT |
86 | static inline u8 IN_TO_REG(unsigned long val) |
87 | { | |
2a844c14 | 88 | unsigned long nval = clamp_val(val, 0, 4080); |
1da177e4 LT |
89 | return (nval + 8) / 16; |
90 | } | |
91 | #define IN_FROM_REG(val) ((val) * 16) | |
92 | ||
93 | static inline u8 FAN_TO_REG(long rpm, int div) | |
94 | { | |
95 | if (rpm <= 0) | |
96 | return 255; | |
3806b45b DC |
97 | if (rpm > 1350000) |
98 | return 1; | |
2a844c14 | 99 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
1da177e4 LT |
100 | } |
101 | ||
102 | static inline int FAN_FROM_REG(u8 val, int div) | |
103 | { | |
9b03079f | 104 | return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); |
1da177e4 LT |
105 | } |
106 | ||
9b03079f GR |
107 | /* |
108 | * TEMP: mC (-128C to +127C) | |
109 | * REG: 1C/bit, two's complement | |
110 | */ | |
1da177e4 LT |
111 | static inline s8 TEMP_TO_REG(int val) |
112 | { | |
2a844c14 | 113 | int nval = clamp_val(val, -128000, 127000) ; |
9b03079f | 114 | return nval < 0 ? (nval - 500) / 1000 : (nval + 500) / 1000; |
1da177e4 LT |
115 | } |
116 | ||
117 | static inline int TEMP_FROM_REG(s8 val) | |
118 | { | |
119 | return val * 1000; | |
120 | } | |
121 | ||
1da177e4 LT |
122 | #define DIV_FROM_REG(val) (1 << (val)) |
123 | ||
1da177e4 | 124 | struct lm78_data { |
0c6e9731 | 125 | struct i2c_client *client; |
1beeffe4 | 126 | struct device *hwmon_dev; |
9a61bf63 | 127 | struct mutex lock; |
1da177e4 LT |
128 | enum chips type; |
129 | ||
6e1b5029 JD |
130 | /* For ISA device only */ |
131 | const char *name; | |
132 | int isa_addr; | |
133 | ||
9a61bf63 | 134 | struct mutex update_lock; |
1da177e4 LT |
135 | char valid; /* !=0 if following fields are valid */ |
136 | unsigned long last_updated; /* In jiffies */ | |
137 | ||
138 | u8 in[7]; /* Register value */ | |
139 | u8 in_max[7]; /* Register value */ | |
140 | u8 in_min[7]; /* Register value */ | |
141 | u8 fan[3]; /* Register value */ | |
142 | u8 fan_min[3]; /* Register value */ | |
143 | s8 temp; /* Register value */ | |
144 | s8 temp_over; /* Register value */ | |
145 | s8 temp_hyst; /* Register value */ | |
146 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
147 | u8 vid; /* Register encoding, combined */ | |
148 | u16 alarms; /* Register encoding, combined */ | |
149 | }; | |
150 | ||
151 | ||
c59cc301 JD |
152 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
153 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 154 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 155 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 LT |
156 | |
157 | ||
1da177e4 | 158 | /* 7 Voltages */ |
247dde4c JD |
159 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
160 | char *buf) | |
1da177e4 | 161 | { |
247dde4c | 162 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 163 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 164 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
1da177e4 LT |
165 | } |
166 | ||
247dde4c JD |
167 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
168 | char *buf) | |
1da177e4 | 169 | { |
247dde4c | 170 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 171 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 172 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index])); |
1da177e4 LT |
173 | } |
174 | ||
247dde4c JD |
175 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
176 | char *buf) | |
1da177e4 | 177 | { |
247dde4c | 178 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 179 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 180 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index])); |
1da177e4 LT |
181 | } |
182 | ||
247dde4c JD |
183 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
184 | const char *buf, size_t count) | |
1da177e4 | 185 | { |
247dde4c | 186 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 187 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 188 | int nr = attr->index; |
9b03079f GR |
189 | unsigned long val; |
190 | int err; | |
191 | ||
192 | err = kstrtoul(buf, 10, &val); | |
193 | if (err) | |
194 | return err; | |
1da177e4 | 195 | |
9a61bf63 | 196 | mutex_lock(&data->update_lock); |
1da177e4 | 197 | data->in_min[nr] = IN_TO_REG(val); |
c59cc301 | 198 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
9a61bf63 | 199 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
200 | return count; |
201 | } | |
202 | ||
247dde4c JD |
203 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
204 | const char *buf, size_t count) | |
1da177e4 | 205 | { |
247dde4c | 206 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 207 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 208 | int nr = attr->index; |
9b03079f GR |
209 | unsigned long val; |
210 | int err; | |
211 | ||
212 | err = kstrtoul(buf, 10, &val); | |
213 | if (err) | |
214 | return err; | |
1da177e4 | 215 | |
9a61bf63 | 216 | mutex_lock(&data->update_lock); |
1da177e4 | 217 | data->in_max[nr] = IN_TO_REG(val); |
c59cc301 | 218 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
9a61bf63 | 219 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
220 | return count; |
221 | } | |
9b03079f | 222 | |
1da177e4 | 223 | #define show_in_offset(offset) \ |
247dde4c JD |
224 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
225 | show_in, NULL, offset); \ | |
226 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
227 | show_in_min, set_in_min, offset); \ | |
228 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
229 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
230 | |
231 | show_in_offset(0); | |
232 | show_in_offset(1); | |
233 | show_in_offset(2); | |
234 | show_in_offset(3); | |
235 | show_in_offset(4); | |
236 | show_in_offset(5); | |
237 | show_in_offset(6); | |
238 | ||
239 | /* Temperature */ | |
247dde4c JD |
240 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
241 | char *buf) | |
1da177e4 LT |
242 | { |
243 | struct lm78_data *data = lm78_update_device(dev); | |
244 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
245 | } | |
246 | ||
247dde4c JD |
247 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
248 | char *buf) | |
1da177e4 LT |
249 | { |
250 | struct lm78_data *data = lm78_update_device(dev); | |
251 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
252 | } | |
253 | ||
247dde4c JD |
254 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
255 | const char *buf, size_t count) | |
1da177e4 | 256 | { |
c40769fe | 257 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
258 | long val; |
259 | int err; | |
260 | ||
261 | err = kstrtol(buf, 10, &val); | |
262 | if (err) | |
263 | return err; | |
1da177e4 | 264 | |
9a61bf63 | 265 | mutex_lock(&data->update_lock); |
1da177e4 | 266 | data->temp_over = TEMP_TO_REG(val); |
c59cc301 | 267 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
9a61bf63 | 268 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
269 | return count; |
270 | } | |
271 | ||
247dde4c JD |
272 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
273 | char *buf) | |
1da177e4 LT |
274 | { |
275 | struct lm78_data *data = lm78_update_device(dev); | |
276 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
277 | } | |
278 | ||
247dde4c JD |
279 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
280 | const char *buf, size_t count) | |
1da177e4 | 281 | { |
c40769fe | 282 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
283 | long val; |
284 | int err; | |
285 | ||
286 | err = kstrtol(buf, 10, &val); | |
287 | if (err) | |
288 | return err; | |
1da177e4 | 289 | |
9a61bf63 | 290 | mutex_lock(&data->update_lock); |
1da177e4 | 291 | data->temp_hyst = TEMP_TO_REG(val); |
c59cc301 | 292 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
9a61bf63 | 293 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
294 | return count; |
295 | } | |
296 | ||
297 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
298 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, | |
299 | show_temp_over, set_temp_over); | |
300 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
301 | show_temp_hyst, set_temp_hyst); | |
302 | ||
303 | /* 3 Fans */ | |
247dde4c JD |
304 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
305 | char *buf) | |
1da177e4 | 306 | { |
247dde4c | 307 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 308 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 309 | int nr = attr->index; |
1da177e4 | 310 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
9b03079f | 311 | DIV_FROM_REG(data->fan_div[nr]))); |
1da177e4 LT |
312 | } |
313 | ||
247dde4c JD |
314 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
315 | char *buf) | |
1da177e4 | 316 | { |
247dde4c | 317 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 318 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 319 | int nr = attr->index; |
9b03079f GR |
320 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
321 | DIV_FROM_REG(data->fan_div[nr]))); | |
1da177e4 LT |
322 | } |
323 | ||
247dde4c JD |
324 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
325 | const char *buf, size_t count) | |
1da177e4 | 326 | { |
247dde4c | 327 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 328 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 329 | int nr = attr->index; |
9b03079f GR |
330 | unsigned long val; |
331 | int err; | |
332 | ||
333 | err = kstrtoul(buf, 10, &val); | |
334 | if (err) | |
335 | return err; | |
1da177e4 | 336 | |
9a61bf63 | 337 | mutex_lock(&data->update_lock); |
1da177e4 | 338 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
c59cc301 | 339 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 340 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
341 | return count; |
342 | } | |
343 | ||
247dde4c JD |
344 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
345 | char *buf) | |
1da177e4 | 346 | { |
247dde4c | 347 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 348 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 349 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
350 | } |
351 | ||
9b03079f GR |
352 | /* |
353 | * Note: we save and restore the fan minimum here, because its value is | |
354 | * determined in part by the fan divisor. This follows the principle of | |
355 | * least surprise; the user doesn't expect the fan minimum to change just | |
356 | * because the divisor changed. | |
357 | */ | |
247dde4c JD |
358 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
359 | const char *buf, size_t count) | |
1da177e4 | 360 | { |
247dde4c | 361 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 362 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 363 | int nr = attr->index; |
1da177e4 LT |
364 | unsigned long min; |
365 | u8 reg; | |
9b03079f GR |
366 | unsigned long val; |
367 | int err; | |
368 | ||
369 | err = kstrtoul(buf, 10, &val); | |
370 | if (err) | |
371 | return err; | |
1da177e4 | 372 | |
9a61bf63 | 373 | mutex_lock(&data->update_lock); |
1da177e4 LT |
374 | min = FAN_FROM_REG(data->fan_min[nr], |
375 | DIV_FROM_REG(data->fan_div[nr])); | |
376 | ||
377 | switch (val) { | |
9b03079f GR |
378 | case 1: |
379 | data->fan_div[nr] = 0; | |
380 | break; | |
381 | case 2: | |
382 | data->fan_div[nr] = 1; | |
383 | break; | |
384 | case 4: | |
385 | data->fan_div[nr] = 2; | |
386 | break; | |
387 | case 8: | |
388 | data->fan_div[nr] = 3; | |
389 | break; | |
1da177e4 | 390 | default: |
b55f3757 GR |
391 | dev_err(dev, |
392 | "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", | |
393 | val); | |
9a61bf63 | 394 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
395 | return -EINVAL; |
396 | } | |
397 | ||
c59cc301 | 398 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
1da177e4 LT |
399 | switch (nr) { |
400 | case 0: | |
401 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
402 | break; | |
403 | case 1: | |
404 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
405 | break; | |
406 | } | |
c59cc301 | 407 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
1da177e4 LT |
408 | |
409 | data->fan_min[nr] = | |
410 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
c59cc301 | 411 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 412 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
413 | |
414 | return count; | |
415 | } | |
416 | ||
247dde4c JD |
417 | #define show_fan_offset(offset) \ |
418 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
419 | show_fan, NULL, offset - 1); \ | |
420 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
421 | show_fan_min, set_fan_min, offset - 1); | |
1da177e4 LT |
422 | |
423 | show_fan_offset(1); | |
424 | show_fan_offset(2); | |
425 | show_fan_offset(3); | |
426 | ||
427 | /* Fan 3 divisor is locked in H/W */ | |
247dde4c JD |
428 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
429 | show_fan_div, set_fan_div, 0); | |
430 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
431 | show_fan_div, set_fan_div, 1); | |
432 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); | |
1da177e4 LT |
433 | |
434 | /* VID */ | |
247dde4c JD |
435 | static ssize_t show_vid(struct device *dev, struct device_attribute *da, |
436 | char *buf) | |
1da177e4 LT |
437 | { |
438 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 439 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 LT |
440 | } |
441 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
442 | ||
443 | /* Alarms */ | |
247dde4c JD |
444 | static ssize_t show_alarms(struct device *dev, struct device_attribute *da, |
445 | char *buf) | |
1da177e4 LT |
446 | { |
447 | struct lm78_data *data = lm78_update_device(dev); | |
448 | return sprintf(buf, "%u\n", data->alarms); | |
449 | } | |
450 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
451 | ||
428a7039 JD |
452 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
453 | char *buf) | |
454 | { | |
455 | struct lm78_data *data = lm78_update_device(dev); | |
456 | int nr = to_sensor_dev_attr(da)->index; | |
457 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
458 | } | |
459 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
460 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
461 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
462 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
463 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
464 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
465 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); | |
466 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
467 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
468 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
469 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
470 | ||
c1685f61 | 471 | static struct attribute *lm78_attributes[] = { |
247dde4c JD |
472 | &sensor_dev_attr_in0_input.dev_attr.attr, |
473 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
474 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 475 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
476 | &sensor_dev_attr_in1_input.dev_attr.attr, |
477 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
478 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 479 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
480 | &sensor_dev_attr_in2_input.dev_attr.attr, |
481 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
482 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 483 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
484 | &sensor_dev_attr_in3_input.dev_attr.attr, |
485 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
486 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 487 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
488 | &sensor_dev_attr_in4_input.dev_attr.attr, |
489 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
490 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 491 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
492 | &sensor_dev_attr_in5_input.dev_attr.attr, |
493 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
494 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 495 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
496 | &sensor_dev_attr_in6_input.dev_attr.attr, |
497 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
498 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 499 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
500 | &dev_attr_temp1_input.attr, |
501 | &dev_attr_temp1_max.attr, | |
502 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 503 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
504 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
505 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
506 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 507 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
508 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
509 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
510 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 511 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
512 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
513 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
514 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 515 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
516 | &dev_attr_alarms.attr, |
517 | &dev_attr_cpu0_vid.attr, | |
518 | ||
519 | NULL | |
520 | }; | |
521 | ||
522 | static const struct attribute_group lm78_group = { | |
523 | .attrs = lm78_attributes, | |
524 | }; | |
525 | ||
90534c5c JD |
526 | /* |
527 | * ISA related code | |
528 | */ | |
529 | #ifdef CONFIG_ISA | |
530 | ||
531 | /* ISA device, if found */ | |
532 | static struct platform_device *pdev; | |
533 | ||
534 | static unsigned short isa_address = 0x290; | |
535 | ||
9b03079f GR |
536 | /* |
537 | * I2C devices get this name attribute automatically, but for ISA devices | |
538 | * we must create it by ourselves. | |
539 | */ | |
c40769fe JD |
540 | static ssize_t show_name(struct device *dev, struct device_attribute |
541 | *devattr, char *buf) | |
542 | { | |
543 | struct lm78_data *data = dev_get_drvdata(dev); | |
544 | ||
6e1b5029 | 545 | return sprintf(buf, "%s\n", data->name); |
c40769fe JD |
546 | } |
547 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
548 | ||
90534c5c JD |
549 | static struct lm78_data *lm78_data_if_isa(void) |
550 | { | |
551 | return pdev ? platform_get_drvdata(pdev) : NULL; | |
552 | } | |
553 | ||
18c73f90 JD |
554 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
555 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
556 | { | |
0c6e9731 | 557 | struct lm78_data *isa; |
18c73f90 JD |
558 | int i; |
559 | ||
560 | if (!pdev) /* No ISA chip */ | |
561 | return 0; | |
18c73f90 JD |
562 | isa = platform_get_drvdata(pdev); |
563 | ||
564 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
565 | return 0; /* Address doesn't match */ | |
566 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
567 | return 0; /* Chip type doesn't match */ | |
568 | ||
9b03079f GR |
569 | /* |
570 | * We compare all the limit registers, the config register and the | |
571 | * interrupt mask registers | |
572 | */ | |
18c73f90 | 573 | for (i = 0x2b; i <= 0x3d; i++) { |
0c6e9731 JD |
574 | if (lm78_read_value(isa, i) != |
575 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
576 | return 0; |
577 | } | |
578 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 579 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
580 | return 0; |
581 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
582 | if (lm78_read_value(isa, i) != |
583 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
584 | return 0; |
585 | } | |
586 | ||
587 | return 1; | |
588 | } | |
90534c5c JD |
589 | #else /* !CONFIG_ISA */ |
590 | ||
591 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
592 | { | |
593 | return 0; | |
594 | } | |
595 | ||
596 | static struct lm78_data *lm78_data_if_isa(void) | |
597 | { | |
598 | return NULL; | |
599 | } | |
600 | #endif /* CONFIG_ISA */ | |
18c73f90 | 601 | |
310ec792 | 602 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 603 | struct i2c_board_info *info) |
1da177e4 | 604 | { |
0c6e9731 | 605 | int i; |
90534c5c | 606 | struct lm78_data *isa = lm78_data_if_isa(); |
0c6e9731 JD |
607 | const char *client_name; |
608 | struct i2c_adapter *adapter = client->adapter; | |
609 | int address = client->addr; | |
1da177e4 | 610 | |
0c6e9731 JD |
611 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
612 | return -ENODEV; | |
1da177e4 | 613 | |
9b03079f GR |
614 | /* |
615 | * We block updates of the ISA device to minimize the risk of | |
616 | * concurrent access to the same LM78 chip through different | |
617 | * interfaces. | |
618 | */ | |
0c6e9731 JD |
619 | if (isa) |
620 | mutex_lock(&isa->update_lock); | |
1da177e4 | 621 | |
52df6440 JD |
622 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
623 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
624 | goto err_nodev; | |
625 | ||
626 | /* Explicitly prevent the misdetection of Winbond chips */ | |
627 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
628 | if (i == 0xa3 || i == 0x5c) | |
629 | goto err_nodev; | |
1da177e4 LT |
630 | |
631 | /* Determine the chip type. */ | |
52df6440 JD |
632 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
633 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
634 | || i == 0x40) /* LM78-J */ | |
635 | client_name = "lm78"; | |
636 | else if ((i & 0xfe) == 0xc0) | |
637 | client_name = "lm79"; | |
638 | else | |
639 | goto err_nodev; | |
640 | ||
641 | if (lm78_alias_detect(client, i)) { | |
b55f3757 GR |
642 | dev_dbg(&adapter->dev, |
643 | "Device at 0x%02x appears to be the same as ISA device\n", | |
644 | address); | |
52df6440 | 645 | goto err_nodev; |
1da177e4 LT |
646 | } |
647 | ||
0c6e9731 JD |
648 | if (isa) |
649 | mutex_unlock(&isa->update_lock); | |
650 | ||
0c6e9731 | 651 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 652 | |
0c6e9731 | 653 | return 0; |
1da177e4 | 654 | |
0c6e9731 JD |
655 | err_nodev: |
656 | if (isa) | |
657 | mutex_unlock(&isa->update_lock); | |
658 | return -ENODEV; | |
659 | } | |
660 | ||
661 | static int lm78_i2c_probe(struct i2c_client *client, | |
662 | const struct i2c_device_id *id) | |
663 | { | |
664 | struct lm78_data *data; | |
665 | int err; | |
666 | ||
7b7bb90c | 667 | data = devm_kzalloc(&client->dev, sizeof(struct lm78_data), GFP_KERNEL); |
0c6e9731 JD |
668 | if (!data) |
669 | return -ENOMEM; | |
670 | ||
671 | i2c_set_clientdata(client, data); | |
672 | data->client = client; | |
673 | data->type = id->driver_data; | |
1da177e4 LT |
674 | |
675 | /* Initialize the LM78 chip */ | |
c59cc301 | 676 | lm78_init_device(data); |
1da177e4 | 677 | |
1da177e4 | 678 | /* Register sysfs hooks */ |
0c6e9731 JD |
679 | err = sysfs_create_group(&client->dev.kobj, &lm78_group); |
680 | if (err) | |
7b7bb90c | 681 | return err; |
c1685f61 | 682 | |
0c6e9731 | 683 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
684 | if (IS_ERR(data->hwmon_dev)) { |
685 | err = PTR_ERR(data->hwmon_dev); | |
7b7bb90c | 686 | goto error; |
943b0830 MH |
687 | } |
688 | ||
1da177e4 LT |
689 | return 0; |
690 | ||
7b7bb90c | 691 | error: |
0c6e9731 | 692 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
1da177e4 LT |
693 | return err; |
694 | } | |
695 | ||
0c6e9731 | 696 | static int lm78_i2c_remove(struct i2c_client *client) |
1da177e4 | 697 | { |
943b0830 | 698 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 | 699 | |
1beeffe4 | 700 | hwmon_device_unregister(data->hwmon_dev); |
c1685f61 | 701 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
c40769fe JD |
702 | |
703 | return 0; | |
704 | } | |
705 | ||
ed4cebdf JD |
706 | static const struct i2c_device_id lm78_i2c_id[] = { |
707 | { "lm78", lm78 }, | |
708 | { "lm79", lm79 }, | |
709 | { } | |
710 | }; | |
711 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
6e1b5029 | 712 | |
ed4cebdf JD |
713 | static struct i2c_driver lm78_driver = { |
714 | .class = I2C_CLASS_HWMON, | |
715 | .driver = { | |
716 | .name = "lm78", | |
717 | }, | |
718 | .probe = lm78_i2c_probe, | |
719 | .remove = lm78_i2c_remove, | |
720 | .id_table = lm78_i2c_id, | |
721 | .detect = lm78_i2c_detect, | |
722 | .address_list = normal_i2c, | |
723 | }; | |
1da177e4 | 724 | |
9b03079f GR |
725 | /* |
726 | * The SMBus locks itself, but ISA access must be locked explicitly! | |
727 | * We don't want to lock the whole ISA bus, so we lock each client | |
728 | * separately. | |
729 | * We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
730 | * would slow down the LM78 access and should not be necessary. | |
731 | */ | |
c59cc301 | 732 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 733 | { |
0c6e9731 | 734 | struct i2c_client *client = data->client; |
c59cc301 | 735 | |
90534c5c | 736 | #ifdef CONFIG_ISA |
0c6e9731 | 737 | if (!client) { /* ISA device */ |
c59cc301 | 738 | int res; |
9a61bf63 | 739 | mutex_lock(&data->lock); |
6e1b5029 JD |
740 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
741 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 742 | mutex_unlock(&data->lock); |
1da177e4 LT |
743 | return res; |
744 | } else | |
90534c5c | 745 | #endif |
1da177e4 LT |
746 | return i2c_smbus_read_byte_data(client, reg); |
747 | } | |
748 | ||
c59cc301 | 749 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 750 | { |
0c6e9731 | 751 | struct i2c_client *client = data->client; |
c59cc301 | 752 | |
90534c5c | 753 | #ifdef CONFIG_ISA |
0c6e9731 | 754 | if (!client) { /* ISA device */ |
9a61bf63 | 755 | mutex_lock(&data->lock); |
6e1b5029 JD |
756 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
757 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 758 | mutex_unlock(&data->lock); |
1da177e4 LT |
759 | return 0; |
760 | } else | |
90534c5c | 761 | #endif |
1da177e4 LT |
762 | return i2c_smbus_write_byte_data(client, reg, value); |
763 | } | |
764 | ||
c59cc301 | 765 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 766 | { |
c40769fe JD |
767 | u8 config; |
768 | int i; | |
1da177e4 LT |
769 | |
770 | /* Start monitoring */ | |
c59cc301 | 771 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 772 | if ((config & 0x09) != 0x01) |
c59cc301 | 773 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 774 | (config & 0xf7) | 0x01); |
c40769fe JD |
775 | |
776 | /* A few vars need to be filled upon startup */ | |
777 | for (i = 0; i < 3; i++) { | |
c59cc301 | 778 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
779 | LM78_REG_FAN_MIN(i)); |
780 | } | |
781 | ||
782 | mutex_init(&data->update_lock); | |
1da177e4 LT |
783 | } |
784 | ||
785 | static struct lm78_data *lm78_update_device(struct device *dev) | |
786 | { | |
c40769fe | 787 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
788 | int i; |
789 | ||
9a61bf63 | 790 | mutex_lock(&data->update_lock); |
1da177e4 LT |
791 | |
792 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
793 | || !data->valid) { | |
794 | ||
c40769fe | 795 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
796 | |
797 | for (i = 0; i <= 6; i++) { | |
798 | data->in[i] = | |
c59cc301 | 799 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 800 | data->in_min[i] = |
c59cc301 | 801 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 802 | data->in_max[i] = |
c59cc301 | 803 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
804 | } |
805 | for (i = 0; i < 3; i++) { | |
806 | data->fan[i] = | |
c59cc301 | 807 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 808 | data->fan_min[i] = |
c59cc301 | 809 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 810 | } |
c59cc301 | 811 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 812 | data->temp_over = |
c59cc301 | 813 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 814 | data->temp_hyst = |
c59cc301 JD |
815 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
816 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
817 | data->vid = i & 0x0f; |
818 | if (data->type == lm79) | |
819 | data->vid |= | |
c59cc301 | 820 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
821 | 0x01) << 4; |
822 | else | |
823 | data->vid |= 0x10; | |
824 | data->fan_div[0] = (i >> 4) & 0x03; | |
825 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
826 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
827 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
828 | data->last_updated = jiffies; |
829 | data->valid = 1; | |
830 | ||
831 | data->fan_div[2] = 1; | |
832 | } | |
833 | ||
9a61bf63 | 834 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
835 | |
836 | return data; | |
837 | } | |
838 | ||
90534c5c | 839 | #ifdef CONFIG_ISA |
6c931ae1 | 840 | static int lm78_isa_probe(struct platform_device *pdev) |
ed4cebdf JD |
841 | { |
842 | int err; | |
843 | struct lm78_data *data; | |
844 | struct resource *res; | |
845 | ||
846 | /* Reserve the ISA region */ | |
847 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
7b7bb90c GR |
848 | if (!devm_request_region(&pdev->dev, res->start + LM78_ADDR_REG_OFFSET, |
849 | 2, "lm78")) | |
850 | return -EBUSY; | |
851 | ||
852 | data = devm_kzalloc(&pdev->dev, sizeof(struct lm78_data), GFP_KERNEL); | |
853 | if (!data) | |
854 | return -ENOMEM; | |
ed4cebdf | 855 | |
ed4cebdf JD |
856 | mutex_init(&data->lock); |
857 | data->isa_addr = res->start; | |
858 | platform_set_drvdata(pdev, data); | |
859 | ||
860 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { | |
861 | data->type = lm79; | |
862 | data->name = "lm79"; | |
863 | } else { | |
864 | data->type = lm78; | |
865 | data->name = "lm78"; | |
866 | } | |
867 | ||
868 | /* Initialize the LM78 chip */ | |
869 | lm78_init_device(data); | |
870 | ||
871 | /* Register sysfs hooks */ | |
9b03079f GR |
872 | err = sysfs_create_group(&pdev->dev.kobj, &lm78_group); |
873 | if (err) | |
874 | goto exit_remove_files; | |
875 | err = device_create_file(&pdev->dev, &dev_attr_name); | |
876 | if (err) | |
ed4cebdf JD |
877 | goto exit_remove_files; |
878 | ||
879 | data->hwmon_dev = hwmon_device_register(&pdev->dev); | |
880 | if (IS_ERR(data->hwmon_dev)) { | |
881 | err = PTR_ERR(data->hwmon_dev); | |
882 | goto exit_remove_files; | |
883 | } | |
884 | ||
885 | return 0; | |
886 | ||
887 | exit_remove_files: | |
888 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
889 | device_remove_file(&pdev->dev, &dev_attr_name); | |
ed4cebdf JD |
890 | return err; |
891 | } | |
892 | ||
281dfd0b | 893 | static int lm78_isa_remove(struct platform_device *pdev) |
ed4cebdf JD |
894 | { |
895 | struct lm78_data *data = platform_get_drvdata(pdev); | |
ed4cebdf JD |
896 | |
897 | hwmon_device_unregister(data->hwmon_dev); | |
898 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
899 | device_remove_file(&pdev->dev, &dev_attr_name); | |
ed4cebdf JD |
900 | |
901 | return 0; | |
902 | } | |
903 | ||
904 | static struct platform_driver lm78_isa_driver = { | |
905 | .driver = { | |
906 | .owner = THIS_MODULE, | |
907 | .name = "lm78", | |
908 | }, | |
909 | .probe = lm78_isa_probe, | |
9e5e9b7a | 910 | .remove = lm78_isa_remove, |
ed4cebdf JD |
911 | }; |
912 | ||
c40769fe JD |
913 | /* return 1 if a supported chip is found, 0 otherwise */ |
914 | static int __init lm78_isa_found(unsigned short address) | |
915 | { | |
916 | int val, save, found = 0; | |
197027e6 JD |
917 | int port; |
918 | ||
9b03079f GR |
919 | /* |
920 | * Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
197027e6 | 921 | * to base+7 and some base+5 to base+6. So we better request each port |
9b03079f GR |
922 | * individually for the probing phase. |
923 | */ | |
197027e6 JD |
924 | for (port = address; port < address + LM78_EXTENT; port++) { |
925 | if (!request_region(port, 1, "lm78")) { | |
ce47da74 | 926 | pr_debug("Failed to request port 0x%x\n", port); |
197027e6 JD |
927 | goto release; |
928 | } | |
47c15532 | 929 | } |
c40769fe JD |
930 | |
931 | #define REALLY_SLOW_IO | |
9b03079f GR |
932 | /* |
933 | * We need the timeouts for at least some LM78-like | |
934 | * chips. But only if we read 'undefined' registers. | |
935 | */ | |
c40769fe JD |
936 | val = inb_p(address + 1); |
937 | if (inb_p(address + 2) != val | |
938 | || inb_p(address + 3) != val | |
939 | || inb_p(address + 7) != val) | |
940 | goto release; | |
941 | #undef REALLY_SLOW_IO | |
942 | ||
9b03079f GR |
943 | /* |
944 | * We should be able to change the 7 LSB of the address port. The | |
945 | * MSB (busy flag) should be clear initially, set after the write. | |
946 | */ | |
c40769fe JD |
947 | save = inb_p(address + LM78_ADDR_REG_OFFSET); |
948 | if (save & 0x80) | |
949 | goto release; | |
950 | val = ~save & 0x7f; | |
951 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
952 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
953 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
954 | goto release; | |
955 | } | |
956 | ||
957 | /* We found a device, now see if it could be an LM78 */ | |
958 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
959 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
960 | if (val & 0x80) | |
961 | goto release; | |
962 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
963 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
964 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
965 | goto release; | |
966 | ||
967 | /* The busy flag should be clear again */ | |
968 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
969 | goto release; | |
970 | ||
971 | /* Explicitly prevent the misdetection of Winbond chips */ | |
972 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
973 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
974 | if (val == 0xa3 || val == 0x5c) | |
975 | goto release; | |
976 | ||
977 | /* Explicitly prevent the misdetection of ITE chips */ | |
978 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
979 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
980 | if (val == 0x90) | |
981 | goto release; | |
982 | ||
983 | /* Determine the chip type */ | |
984 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
985 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 986 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
987 | || val == 0x40 /* LM78-J */ |
988 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
989 | found = 1; | |
990 | ||
991 | if (found) | |
ce47da74 | 992 | pr_info("Found an %s chip at %#x\n", |
c40769fe JD |
993 | val & 0x80 ? "LM79" : "LM78", (int)address); |
994 | ||
995 | release: | |
197027e6 JD |
996 | for (port--; port >= address; port--) |
997 | release_region(port, 1); | |
c40769fe JD |
998 | return found; |
999 | } | |
1000 | ||
1001 | static int __init lm78_isa_device_add(unsigned short address) | |
1002 | { | |
1003 | struct resource res = { | |
1004 | .start = address, | |
15bde2f1 | 1005 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
1006 | .name = "lm78", |
1007 | .flags = IORESOURCE_IO, | |
1008 | }; | |
1009 | int err; | |
1010 | ||
1011 | pdev = platform_device_alloc("lm78", address); | |
1012 | if (!pdev) { | |
1013 | err = -ENOMEM; | |
ce47da74 | 1014 | pr_err("Device allocation failed\n"); |
c40769fe JD |
1015 | goto exit; |
1016 | } | |
1017 | ||
1018 | err = platform_device_add_resources(pdev, &res, 1); | |
1019 | if (err) { | |
ce47da74 | 1020 | pr_err("Device resource addition failed (%d)\n", err); |
c40769fe JD |
1021 | goto exit_device_put; |
1022 | } | |
1023 | ||
1024 | err = platform_device_add(pdev); | |
1025 | if (err) { | |
ce47da74 | 1026 | pr_err("Device addition failed (%d)\n", err); |
c40769fe JD |
1027 | goto exit_device_put; |
1028 | } | |
1029 | ||
1030 | return 0; | |
1031 | ||
1032 | exit_device_put: | |
1033 | platform_device_put(pdev); | |
1034 | exit: | |
1035 | pdev = NULL; | |
1036 | return err; | |
1037 | } | |
1038 | ||
90534c5c | 1039 | static int __init lm78_isa_register(void) |
1da177e4 | 1040 | { |
fde09509 JD |
1041 | int res; |
1042 | ||
c40769fe JD |
1043 | if (lm78_isa_found(isa_address)) { |
1044 | res = platform_driver_register(&lm78_isa_driver); | |
1045 | if (res) | |
18c73f90 | 1046 | goto exit; |
fde09509 | 1047 | |
c40769fe JD |
1048 | /* Sets global pdev as a side effect */ |
1049 | res = lm78_isa_device_add(isa_address); | |
1050 | if (res) | |
1051 | goto exit_unreg_isa_driver; | |
1052 | } | |
fde09509 JD |
1053 | |
1054 | return 0; | |
c40769fe JD |
1055 | |
1056 | exit_unreg_isa_driver: | |
1057 | platform_driver_unregister(&lm78_isa_driver); | |
c40769fe JD |
1058 | exit: |
1059 | return res; | |
1da177e4 LT |
1060 | } |
1061 | ||
90534c5c | 1062 | static void lm78_isa_unregister(void) |
1da177e4 | 1063 | { |
c40769fe JD |
1064 | if (pdev) { |
1065 | platform_device_unregister(pdev); | |
1066 | platform_driver_unregister(&lm78_isa_driver); | |
1067 | } | |
90534c5c JD |
1068 | } |
1069 | #else /* !CONFIG_ISA */ | |
1070 | ||
1071 | static int __init lm78_isa_register(void) | |
1072 | { | |
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | static void lm78_isa_unregister(void) | |
1077 | { | |
1078 | } | |
1079 | #endif /* CONFIG_ISA */ | |
1080 | ||
1081 | static int __init sm_lm78_init(void) | |
1082 | { | |
1083 | int res; | |
1084 | ||
9b03079f GR |
1085 | /* |
1086 | * We register the ISA device first, so that we can skip the | |
1087 | * registration of an I2C interface to the same device. | |
1088 | */ | |
90534c5c JD |
1089 | res = lm78_isa_register(); |
1090 | if (res) | |
1091 | goto exit; | |
1092 | ||
1093 | res = i2c_add_driver(&lm78_driver); | |
1094 | if (res) | |
1095 | goto exit_unreg_isa_device; | |
1096 | ||
1097 | return 0; | |
1098 | ||
1099 | exit_unreg_isa_device: | |
1100 | lm78_isa_unregister(); | |
1101 | exit: | |
1102 | return res; | |
1103 | } | |
1104 | ||
1105 | static void __exit sm_lm78_exit(void) | |
1106 | { | |
1107 | lm78_isa_unregister(); | |
1da177e4 LT |
1108 | i2c_del_driver(&lm78_driver); |
1109 | } | |
1110 | ||
7c81c60f | 1111 | MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <jdelvare@suse.de>"); |
27fe048e | 1112 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
1113 | MODULE_LICENSE("GPL"); |
1114 | ||
1115 | module_init(sm_lm78_init); | |
1116 | module_exit(sm_lm78_exit); |