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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> | |
5 | * Copyright (c) 2007, 2011 Jean Delvare <khali@linux-fr.org> | |
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 | { | |
88 | unsigned long nval = SENSORS_LIMIT(val, 0, 4080); | |
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; | |
97 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
98 | } | |
99 | ||
100 | static inline int FAN_FROM_REG(u8 val, int div) | |
101 | { | |
9b03079f | 102 | return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); |
1da177e4 LT |
103 | } |
104 | ||
9b03079f GR |
105 | /* |
106 | * TEMP: mC (-128C to +127C) | |
107 | * REG: 1C/bit, two's complement | |
108 | */ | |
1da177e4 LT |
109 | static inline s8 TEMP_TO_REG(int val) |
110 | { | |
111 | int nval = SENSORS_LIMIT(val, -128000, 127000) ; | |
9b03079f | 112 | return nval < 0 ? (nval - 500) / 1000 : (nval + 500) / 1000; |
1da177e4 LT |
113 | } |
114 | ||
115 | static inline int TEMP_FROM_REG(s8 val) | |
116 | { | |
117 | return val * 1000; | |
118 | } | |
119 | ||
1da177e4 LT |
120 | #define DIV_FROM_REG(val) (1 << (val)) |
121 | ||
1da177e4 | 122 | struct lm78_data { |
0c6e9731 | 123 | struct i2c_client *client; |
1beeffe4 | 124 | struct device *hwmon_dev; |
9a61bf63 | 125 | struct mutex lock; |
1da177e4 LT |
126 | enum chips type; |
127 | ||
6e1b5029 JD |
128 | /* For ISA device only */ |
129 | const char *name; | |
130 | int isa_addr; | |
131 | ||
9a61bf63 | 132 | struct mutex update_lock; |
1da177e4 LT |
133 | char valid; /* !=0 if following fields are valid */ |
134 | unsigned long last_updated; /* In jiffies */ | |
135 | ||
136 | u8 in[7]; /* Register value */ | |
137 | u8 in_max[7]; /* Register value */ | |
138 | u8 in_min[7]; /* Register value */ | |
139 | u8 fan[3]; /* Register value */ | |
140 | u8 fan_min[3]; /* Register value */ | |
141 | s8 temp; /* Register value */ | |
142 | s8 temp_over; /* Register value */ | |
143 | s8 temp_hyst; /* Register value */ | |
144 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
145 | u8 vid; /* Register encoding, combined */ | |
146 | u16 alarms; /* Register encoding, combined */ | |
147 | }; | |
148 | ||
149 | ||
c59cc301 JD |
150 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
151 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 152 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 153 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 LT |
154 | |
155 | ||
1da177e4 | 156 | /* 7 Voltages */ |
247dde4c JD |
157 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
158 | char *buf) | |
1da177e4 | 159 | { |
247dde4c | 160 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 161 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 162 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
1da177e4 LT |
163 | } |
164 | ||
247dde4c JD |
165 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
166 | char *buf) | |
1da177e4 | 167 | { |
247dde4c | 168 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 169 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 170 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index])); |
1da177e4 LT |
171 | } |
172 | ||
247dde4c JD |
173 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
174 | char *buf) | |
1da177e4 | 175 | { |
247dde4c | 176 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 177 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 178 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index])); |
1da177e4 LT |
179 | } |
180 | ||
247dde4c JD |
181 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
182 | const char *buf, size_t count) | |
1da177e4 | 183 | { |
247dde4c | 184 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 185 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 186 | int nr = attr->index; |
9b03079f GR |
187 | unsigned long val; |
188 | int err; | |
189 | ||
190 | err = kstrtoul(buf, 10, &val); | |
191 | if (err) | |
192 | return err; | |
1da177e4 | 193 | |
9a61bf63 | 194 | mutex_lock(&data->update_lock); |
1da177e4 | 195 | data->in_min[nr] = IN_TO_REG(val); |
c59cc301 | 196 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
9a61bf63 | 197 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
198 | return count; |
199 | } | |
200 | ||
247dde4c JD |
201 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
202 | const char *buf, size_t count) | |
1da177e4 | 203 | { |
247dde4c | 204 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 205 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 206 | int nr = attr->index; |
9b03079f GR |
207 | unsigned long val; |
208 | int err; | |
209 | ||
210 | err = kstrtoul(buf, 10, &val); | |
211 | if (err) | |
212 | return err; | |
1da177e4 | 213 | |
9a61bf63 | 214 | mutex_lock(&data->update_lock); |
1da177e4 | 215 | data->in_max[nr] = IN_TO_REG(val); |
c59cc301 | 216 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
9a61bf63 | 217 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
218 | return count; |
219 | } | |
9b03079f | 220 | |
1da177e4 | 221 | #define show_in_offset(offset) \ |
247dde4c JD |
222 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
223 | show_in, NULL, offset); \ | |
224 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
225 | show_in_min, set_in_min, offset); \ | |
226 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
227 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
228 | |
229 | show_in_offset(0); | |
230 | show_in_offset(1); | |
231 | show_in_offset(2); | |
232 | show_in_offset(3); | |
233 | show_in_offset(4); | |
234 | show_in_offset(5); | |
235 | show_in_offset(6); | |
236 | ||
237 | /* Temperature */ | |
247dde4c JD |
238 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
239 | char *buf) | |
1da177e4 LT |
240 | { |
241 | struct lm78_data *data = lm78_update_device(dev); | |
242 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
243 | } | |
244 | ||
247dde4c JD |
245 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
246 | char *buf) | |
1da177e4 LT |
247 | { |
248 | struct lm78_data *data = lm78_update_device(dev); | |
249 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
250 | } | |
251 | ||
247dde4c JD |
252 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
253 | const char *buf, size_t count) | |
1da177e4 | 254 | { |
c40769fe | 255 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
256 | long val; |
257 | int err; | |
258 | ||
259 | err = kstrtol(buf, 10, &val); | |
260 | if (err) | |
261 | return err; | |
1da177e4 | 262 | |
9a61bf63 | 263 | mutex_lock(&data->update_lock); |
1da177e4 | 264 | data->temp_over = TEMP_TO_REG(val); |
c59cc301 | 265 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
9a61bf63 | 266 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
267 | return count; |
268 | } | |
269 | ||
247dde4c JD |
270 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
271 | char *buf) | |
1da177e4 LT |
272 | { |
273 | struct lm78_data *data = lm78_update_device(dev); | |
274 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
275 | } | |
276 | ||
247dde4c JD |
277 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
278 | const char *buf, size_t count) | |
1da177e4 | 279 | { |
c40769fe | 280 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
281 | long val; |
282 | int err; | |
283 | ||
284 | err = kstrtol(buf, 10, &val); | |
285 | if (err) | |
286 | return err; | |
1da177e4 | 287 | |
9a61bf63 | 288 | mutex_lock(&data->update_lock); |
1da177e4 | 289 | data->temp_hyst = TEMP_TO_REG(val); |
c59cc301 | 290 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
9a61bf63 | 291 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
292 | return count; |
293 | } | |
294 | ||
295 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
296 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, | |
297 | show_temp_over, set_temp_over); | |
298 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
299 | show_temp_hyst, set_temp_hyst); | |
300 | ||
301 | /* 3 Fans */ | |
247dde4c JD |
302 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
303 | char *buf) | |
1da177e4 | 304 | { |
247dde4c | 305 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 306 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 307 | int nr = attr->index; |
1da177e4 | 308 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
9b03079f | 309 | DIV_FROM_REG(data->fan_div[nr]))); |
1da177e4 LT |
310 | } |
311 | ||
247dde4c JD |
312 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
313 | char *buf) | |
1da177e4 | 314 | { |
247dde4c | 315 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 316 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 317 | int nr = attr->index; |
9b03079f GR |
318 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
319 | DIV_FROM_REG(data->fan_div[nr]))); | |
1da177e4 LT |
320 | } |
321 | ||
247dde4c JD |
322 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
323 | const char *buf, size_t count) | |
1da177e4 | 324 | { |
247dde4c | 325 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 326 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 327 | int nr = attr->index; |
9b03079f GR |
328 | unsigned long val; |
329 | int err; | |
330 | ||
331 | err = kstrtoul(buf, 10, &val); | |
332 | if (err) | |
333 | return err; | |
1da177e4 | 334 | |
9a61bf63 | 335 | mutex_lock(&data->update_lock); |
1da177e4 | 336 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
c59cc301 | 337 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 338 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
339 | return count; |
340 | } | |
341 | ||
247dde4c JD |
342 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
343 | char *buf) | |
1da177e4 | 344 | { |
247dde4c | 345 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 346 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 347 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
348 | } |
349 | ||
9b03079f GR |
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 surprise; the user doesn't expect the fan minimum to change just | |
354 | * because the divisor changed. | |
355 | */ | |
247dde4c JD |
356 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
357 | const char *buf, size_t count) | |
1da177e4 | 358 | { |
247dde4c | 359 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 360 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 361 | int nr = attr->index; |
1da177e4 LT |
362 | unsigned long min; |
363 | u8 reg; | |
9b03079f GR |
364 | unsigned long val; |
365 | int err; | |
366 | ||
367 | err = kstrtoul(buf, 10, &val); | |
368 | if (err) | |
369 | return err; | |
1da177e4 | 370 | |
9a61bf63 | 371 | mutex_lock(&data->update_lock); |
1da177e4 LT |
372 | min = FAN_FROM_REG(data->fan_min[nr], |
373 | DIV_FROM_REG(data->fan_div[nr])); | |
374 | ||
375 | switch (val) { | |
9b03079f GR |
376 | case 1: |
377 | data->fan_div[nr] = 0; | |
378 | break; | |
379 | case 2: | |
380 | data->fan_div[nr] = 1; | |
381 | break; | |
382 | case 4: | |
383 | data->fan_div[nr] = 2; | |
384 | break; | |
385 | case 8: | |
386 | data->fan_div[nr] = 3; | |
387 | break; | |
1da177e4 | 388 | default: |
c40769fe | 389 | dev_err(dev, "fan_div value %ld not " |
1da177e4 | 390 | "supported. Choose one of 1, 2, 4 or 8!\n", val); |
9a61bf63 | 391 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
392 | return -EINVAL; |
393 | } | |
394 | ||
c59cc301 | 395 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
1da177e4 LT |
396 | switch (nr) { |
397 | case 0: | |
398 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
399 | break; | |
400 | case 1: | |
401 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
402 | break; | |
403 | } | |
c59cc301 | 404 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
1da177e4 LT |
405 | |
406 | data->fan_min[nr] = | |
407 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
c59cc301 | 408 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 409 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
410 | |
411 | return count; | |
412 | } | |
413 | ||
247dde4c JD |
414 | #define show_fan_offset(offset) \ |
415 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
416 | show_fan, NULL, offset - 1); \ | |
417 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
418 | show_fan_min, set_fan_min, offset - 1); | |
1da177e4 LT |
419 | |
420 | show_fan_offset(1); | |
421 | show_fan_offset(2); | |
422 | show_fan_offset(3); | |
423 | ||
424 | /* Fan 3 divisor is locked in H/W */ | |
247dde4c JD |
425 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
426 | show_fan_div, set_fan_div, 0); | |
427 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
428 | show_fan_div, set_fan_div, 1); | |
429 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); | |
1da177e4 LT |
430 | |
431 | /* VID */ | |
247dde4c JD |
432 | static ssize_t show_vid(struct device *dev, struct device_attribute *da, |
433 | char *buf) | |
1da177e4 LT |
434 | { |
435 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 436 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 LT |
437 | } |
438 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
439 | ||
440 | /* Alarms */ | |
247dde4c JD |
441 | static ssize_t show_alarms(struct device *dev, struct device_attribute *da, |
442 | char *buf) | |
1da177e4 LT |
443 | { |
444 | struct lm78_data *data = lm78_update_device(dev); | |
445 | return sprintf(buf, "%u\n", data->alarms); | |
446 | } | |
447 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
448 | ||
428a7039 JD |
449 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
450 | char *buf) | |
451 | { | |
452 | struct lm78_data *data = lm78_update_device(dev); | |
453 | int nr = to_sensor_dev_attr(da)->index; | |
454 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
455 | } | |
456 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
457 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
458 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
459 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
460 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
461 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
462 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); | |
463 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
464 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
465 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
466 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
467 | ||
c1685f61 | 468 | static struct attribute *lm78_attributes[] = { |
247dde4c JD |
469 | &sensor_dev_attr_in0_input.dev_attr.attr, |
470 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
471 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 472 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
473 | &sensor_dev_attr_in1_input.dev_attr.attr, |
474 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
475 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 476 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
477 | &sensor_dev_attr_in2_input.dev_attr.attr, |
478 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
479 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 480 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
481 | &sensor_dev_attr_in3_input.dev_attr.attr, |
482 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
483 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 484 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
485 | &sensor_dev_attr_in4_input.dev_attr.attr, |
486 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
487 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 488 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
489 | &sensor_dev_attr_in5_input.dev_attr.attr, |
490 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
491 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 492 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
493 | &sensor_dev_attr_in6_input.dev_attr.attr, |
494 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
495 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 496 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
497 | &dev_attr_temp1_input.attr, |
498 | &dev_attr_temp1_max.attr, | |
499 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 500 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
501 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
502 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
503 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 504 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
505 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
506 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
507 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 508 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
509 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
510 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
511 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 512 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
513 | &dev_attr_alarms.attr, |
514 | &dev_attr_cpu0_vid.attr, | |
515 | ||
516 | NULL | |
517 | }; | |
518 | ||
519 | static const struct attribute_group lm78_group = { | |
520 | .attrs = lm78_attributes, | |
521 | }; | |
522 | ||
90534c5c JD |
523 | /* |
524 | * ISA related code | |
525 | */ | |
526 | #ifdef CONFIG_ISA | |
527 | ||
528 | /* ISA device, if found */ | |
529 | static struct platform_device *pdev; | |
530 | ||
531 | static unsigned short isa_address = 0x290; | |
532 | ||
9b03079f GR |
533 | /* |
534 | * I2C devices get this name attribute automatically, but for ISA devices | |
535 | * we must create it by ourselves. | |
536 | */ | |
c40769fe JD |
537 | static ssize_t show_name(struct device *dev, struct device_attribute |
538 | *devattr, char *buf) | |
539 | { | |
540 | struct lm78_data *data = dev_get_drvdata(dev); | |
541 | ||
6e1b5029 | 542 | return sprintf(buf, "%s\n", data->name); |
c40769fe JD |
543 | } |
544 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
545 | ||
90534c5c JD |
546 | static struct lm78_data *lm78_data_if_isa(void) |
547 | { | |
548 | return pdev ? platform_get_drvdata(pdev) : NULL; | |
549 | } | |
550 | ||
18c73f90 JD |
551 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
552 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
553 | { | |
0c6e9731 | 554 | struct lm78_data *isa; |
18c73f90 JD |
555 | int i; |
556 | ||
557 | if (!pdev) /* No ISA chip */ | |
558 | return 0; | |
18c73f90 JD |
559 | isa = platform_get_drvdata(pdev); |
560 | ||
561 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
562 | return 0; /* Address doesn't match */ | |
563 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
564 | return 0; /* Chip type doesn't match */ | |
565 | ||
9b03079f GR |
566 | /* |
567 | * We compare all the limit registers, the config register and the | |
568 | * interrupt mask registers | |
569 | */ | |
18c73f90 | 570 | for (i = 0x2b; i <= 0x3d; i++) { |
0c6e9731 JD |
571 | if (lm78_read_value(isa, i) != |
572 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
573 | return 0; |
574 | } | |
575 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 576 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
577 | return 0; |
578 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
579 | if (lm78_read_value(isa, i) != |
580 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
581 | return 0; |
582 | } | |
583 | ||
584 | return 1; | |
585 | } | |
90534c5c JD |
586 | #else /* !CONFIG_ISA */ |
587 | ||
588 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
589 | { | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static struct lm78_data *lm78_data_if_isa(void) | |
594 | { | |
595 | return NULL; | |
596 | } | |
597 | #endif /* CONFIG_ISA */ | |
18c73f90 | 598 | |
310ec792 | 599 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 600 | struct i2c_board_info *info) |
1da177e4 | 601 | { |
0c6e9731 | 602 | int i; |
90534c5c | 603 | struct lm78_data *isa = lm78_data_if_isa(); |
0c6e9731 JD |
604 | const char *client_name; |
605 | struct i2c_adapter *adapter = client->adapter; | |
606 | int address = client->addr; | |
1da177e4 | 607 | |
0c6e9731 JD |
608 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
609 | return -ENODEV; | |
1da177e4 | 610 | |
9b03079f GR |
611 | /* |
612 | * We block updates of the ISA device to minimize the risk of | |
613 | * concurrent access to the same LM78 chip through different | |
614 | * interfaces. | |
615 | */ | |
0c6e9731 JD |
616 | if (isa) |
617 | mutex_lock(&isa->update_lock); | |
1da177e4 | 618 | |
52df6440 JD |
619 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
620 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
621 | goto err_nodev; | |
622 | ||
623 | /* Explicitly prevent the misdetection of Winbond chips */ | |
624 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
625 | if (i == 0xa3 || i == 0x5c) | |
626 | goto err_nodev; | |
1da177e4 LT |
627 | |
628 | /* Determine the chip type. */ | |
52df6440 JD |
629 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
630 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
631 | || i == 0x40) /* LM78-J */ | |
632 | client_name = "lm78"; | |
633 | else if ((i & 0xfe) == 0xc0) | |
634 | client_name = "lm79"; | |
635 | else | |
636 | goto err_nodev; | |
637 | ||
638 | if (lm78_alias_detect(client, i)) { | |
639 | dev_dbg(&adapter->dev, "Device at 0x%02x appears to " | |
640 | "be the same as ISA device\n", address); | |
641 | goto err_nodev; | |
1da177e4 LT |
642 | } |
643 | ||
0c6e9731 JD |
644 | if (isa) |
645 | mutex_unlock(&isa->update_lock); | |
646 | ||
0c6e9731 | 647 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 648 | |
0c6e9731 | 649 | return 0; |
1da177e4 | 650 | |
0c6e9731 JD |
651 | err_nodev: |
652 | if (isa) | |
653 | mutex_unlock(&isa->update_lock); | |
654 | return -ENODEV; | |
655 | } | |
656 | ||
657 | static int lm78_i2c_probe(struct i2c_client *client, | |
658 | const struct i2c_device_id *id) | |
659 | { | |
660 | struct lm78_data *data; | |
661 | int err; | |
662 | ||
7b7bb90c | 663 | data = devm_kzalloc(&client->dev, sizeof(struct lm78_data), GFP_KERNEL); |
0c6e9731 JD |
664 | if (!data) |
665 | return -ENOMEM; | |
666 | ||
667 | i2c_set_clientdata(client, data); | |
668 | data->client = client; | |
669 | data->type = id->driver_data; | |
1da177e4 LT |
670 | |
671 | /* Initialize the LM78 chip */ | |
c59cc301 | 672 | lm78_init_device(data); |
1da177e4 | 673 | |
1da177e4 | 674 | /* Register sysfs hooks */ |
0c6e9731 JD |
675 | err = sysfs_create_group(&client->dev.kobj, &lm78_group); |
676 | if (err) | |
7b7bb90c | 677 | return err; |
c1685f61 | 678 | |
0c6e9731 | 679 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
680 | if (IS_ERR(data->hwmon_dev)) { |
681 | err = PTR_ERR(data->hwmon_dev); | |
7b7bb90c | 682 | goto error; |
943b0830 MH |
683 | } |
684 | ||
1da177e4 LT |
685 | return 0; |
686 | ||
7b7bb90c | 687 | error: |
0c6e9731 | 688 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
1da177e4 LT |
689 | return err; |
690 | } | |
691 | ||
0c6e9731 | 692 | static int lm78_i2c_remove(struct i2c_client *client) |
1da177e4 | 693 | { |
943b0830 | 694 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 | 695 | |
1beeffe4 | 696 | hwmon_device_unregister(data->hwmon_dev); |
c1685f61 | 697 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
c40769fe JD |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
ed4cebdf JD |
702 | static const struct i2c_device_id lm78_i2c_id[] = { |
703 | { "lm78", lm78 }, | |
704 | { "lm79", lm79 }, | |
705 | { } | |
706 | }; | |
707 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
6e1b5029 | 708 | |
ed4cebdf JD |
709 | static struct i2c_driver lm78_driver = { |
710 | .class = I2C_CLASS_HWMON, | |
711 | .driver = { | |
712 | .name = "lm78", | |
713 | }, | |
714 | .probe = lm78_i2c_probe, | |
715 | .remove = lm78_i2c_remove, | |
716 | .id_table = lm78_i2c_id, | |
717 | .detect = lm78_i2c_detect, | |
718 | .address_list = normal_i2c, | |
719 | }; | |
1da177e4 | 720 | |
9b03079f GR |
721 | /* |
722 | * The SMBus locks itself, but ISA access must be locked explicitly! | |
723 | * We don't want to lock the whole ISA bus, so we lock each client | |
724 | * separately. | |
725 | * We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
726 | * would slow down the LM78 access and should not be necessary. | |
727 | */ | |
c59cc301 | 728 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 729 | { |
0c6e9731 | 730 | struct i2c_client *client = data->client; |
c59cc301 | 731 | |
90534c5c | 732 | #ifdef CONFIG_ISA |
0c6e9731 | 733 | if (!client) { /* ISA device */ |
c59cc301 | 734 | int res; |
9a61bf63 | 735 | mutex_lock(&data->lock); |
6e1b5029 JD |
736 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
737 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 738 | mutex_unlock(&data->lock); |
1da177e4 LT |
739 | return res; |
740 | } else | |
90534c5c | 741 | #endif |
1da177e4 LT |
742 | return i2c_smbus_read_byte_data(client, reg); |
743 | } | |
744 | ||
c59cc301 | 745 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 746 | { |
0c6e9731 | 747 | struct i2c_client *client = data->client; |
c59cc301 | 748 | |
90534c5c | 749 | #ifdef CONFIG_ISA |
0c6e9731 | 750 | if (!client) { /* ISA device */ |
9a61bf63 | 751 | mutex_lock(&data->lock); |
6e1b5029 JD |
752 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
753 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 754 | mutex_unlock(&data->lock); |
1da177e4 LT |
755 | return 0; |
756 | } else | |
90534c5c | 757 | #endif |
1da177e4 LT |
758 | return i2c_smbus_write_byte_data(client, reg, value); |
759 | } | |
760 | ||
c59cc301 | 761 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 762 | { |
c40769fe JD |
763 | u8 config; |
764 | int i; | |
1da177e4 LT |
765 | |
766 | /* Start monitoring */ | |
c59cc301 | 767 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 768 | if ((config & 0x09) != 0x01) |
c59cc301 | 769 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 770 | (config & 0xf7) | 0x01); |
c40769fe JD |
771 | |
772 | /* A few vars need to be filled upon startup */ | |
773 | for (i = 0; i < 3; i++) { | |
c59cc301 | 774 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
775 | LM78_REG_FAN_MIN(i)); |
776 | } | |
777 | ||
778 | mutex_init(&data->update_lock); | |
1da177e4 LT |
779 | } |
780 | ||
781 | static struct lm78_data *lm78_update_device(struct device *dev) | |
782 | { | |
c40769fe | 783 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
784 | int i; |
785 | ||
9a61bf63 | 786 | mutex_lock(&data->update_lock); |
1da177e4 LT |
787 | |
788 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
789 | || !data->valid) { | |
790 | ||
c40769fe | 791 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
792 | |
793 | for (i = 0; i <= 6; i++) { | |
794 | data->in[i] = | |
c59cc301 | 795 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 796 | data->in_min[i] = |
c59cc301 | 797 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 798 | data->in_max[i] = |
c59cc301 | 799 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
800 | } |
801 | for (i = 0; i < 3; i++) { | |
802 | data->fan[i] = | |
c59cc301 | 803 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 804 | data->fan_min[i] = |
c59cc301 | 805 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 806 | } |
c59cc301 | 807 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 808 | data->temp_over = |
c59cc301 | 809 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 810 | data->temp_hyst = |
c59cc301 JD |
811 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
812 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
813 | data->vid = i & 0x0f; |
814 | if (data->type == lm79) | |
815 | data->vid |= | |
c59cc301 | 816 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
817 | 0x01) << 4; |
818 | else | |
819 | data->vid |= 0x10; | |
820 | data->fan_div[0] = (i >> 4) & 0x03; | |
821 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
822 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
823 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
824 | data->last_updated = jiffies; |
825 | data->valid = 1; | |
826 | ||
827 | data->fan_div[2] = 1; | |
828 | } | |
829 | ||
9a61bf63 | 830 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
831 | |
832 | return data; | |
833 | } | |
834 | ||
90534c5c | 835 | #ifdef CONFIG_ISA |
6c931ae1 | 836 | static int lm78_isa_probe(struct platform_device *pdev) |
ed4cebdf JD |
837 | { |
838 | int err; | |
839 | struct lm78_data *data; | |
840 | struct resource *res; | |
841 | ||
842 | /* Reserve the ISA region */ | |
843 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
7b7bb90c GR |
844 | if (!devm_request_region(&pdev->dev, res->start + LM78_ADDR_REG_OFFSET, |
845 | 2, "lm78")) | |
846 | return -EBUSY; | |
847 | ||
848 | data = devm_kzalloc(&pdev->dev, sizeof(struct lm78_data), GFP_KERNEL); | |
849 | if (!data) | |
850 | return -ENOMEM; | |
ed4cebdf | 851 | |
ed4cebdf JD |
852 | mutex_init(&data->lock); |
853 | data->isa_addr = res->start; | |
854 | platform_set_drvdata(pdev, data); | |
855 | ||
856 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { | |
857 | data->type = lm79; | |
858 | data->name = "lm79"; | |
859 | } else { | |
860 | data->type = lm78; | |
861 | data->name = "lm78"; | |
862 | } | |
863 | ||
864 | /* Initialize the LM78 chip */ | |
865 | lm78_init_device(data); | |
866 | ||
867 | /* Register sysfs hooks */ | |
9b03079f GR |
868 | err = sysfs_create_group(&pdev->dev.kobj, &lm78_group); |
869 | if (err) | |
870 | goto exit_remove_files; | |
871 | err = device_create_file(&pdev->dev, &dev_attr_name); | |
872 | if (err) | |
ed4cebdf JD |
873 | goto exit_remove_files; |
874 | ||
875 | data->hwmon_dev = hwmon_device_register(&pdev->dev); | |
876 | if (IS_ERR(data->hwmon_dev)) { | |
877 | err = PTR_ERR(data->hwmon_dev); | |
878 | goto exit_remove_files; | |
879 | } | |
880 | ||
881 | return 0; | |
882 | ||
883 | exit_remove_files: | |
884 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
885 | device_remove_file(&pdev->dev, &dev_attr_name); | |
ed4cebdf JD |
886 | return err; |
887 | } | |
888 | ||
281dfd0b | 889 | static int lm78_isa_remove(struct platform_device *pdev) |
ed4cebdf JD |
890 | { |
891 | struct lm78_data *data = platform_get_drvdata(pdev); | |
ed4cebdf JD |
892 | |
893 | hwmon_device_unregister(data->hwmon_dev); | |
894 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
895 | device_remove_file(&pdev->dev, &dev_attr_name); | |
ed4cebdf JD |
896 | |
897 | return 0; | |
898 | } | |
899 | ||
900 | static struct platform_driver lm78_isa_driver = { | |
901 | .driver = { | |
902 | .owner = THIS_MODULE, | |
903 | .name = "lm78", | |
904 | }, | |
905 | .probe = lm78_isa_probe, | |
9e5e9b7a | 906 | .remove = lm78_isa_remove, |
ed4cebdf JD |
907 | }; |
908 | ||
c40769fe JD |
909 | /* return 1 if a supported chip is found, 0 otherwise */ |
910 | static int __init lm78_isa_found(unsigned short address) | |
911 | { | |
912 | int val, save, found = 0; | |
197027e6 JD |
913 | int port; |
914 | ||
9b03079f GR |
915 | /* |
916 | * Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
197027e6 | 917 | * to base+7 and some base+5 to base+6. So we better request each port |
9b03079f GR |
918 | * individually for the probing phase. |
919 | */ | |
197027e6 JD |
920 | for (port = address; port < address + LM78_EXTENT; port++) { |
921 | if (!request_region(port, 1, "lm78")) { | |
ce47da74 | 922 | pr_debug("Failed to request port 0x%x\n", port); |
197027e6 JD |
923 | goto release; |
924 | } | |
47c15532 | 925 | } |
c40769fe JD |
926 | |
927 | #define REALLY_SLOW_IO | |
9b03079f GR |
928 | /* |
929 | * We need the timeouts for at least some LM78-like | |
930 | * chips. But only if we read 'undefined' registers. | |
931 | */ | |
c40769fe JD |
932 | val = inb_p(address + 1); |
933 | if (inb_p(address + 2) != val | |
934 | || inb_p(address + 3) != val | |
935 | || inb_p(address + 7) != val) | |
936 | goto release; | |
937 | #undef REALLY_SLOW_IO | |
938 | ||
9b03079f GR |
939 | /* |
940 | * We should be able to change the 7 LSB of the address port. The | |
941 | * MSB (busy flag) should be clear initially, set after the write. | |
942 | */ | |
c40769fe JD |
943 | save = inb_p(address + LM78_ADDR_REG_OFFSET); |
944 | if (save & 0x80) | |
945 | goto release; | |
946 | val = ~save & 0x7f; | |
947 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
948 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
949 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
950 | goto release; | |
951 | } | |
952 | ||
953 | /* We found a device, now see if it could be an LM78 */ | |
954 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
955 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
956 | if (val & 0x80) | |
957 | goto release; | |
958 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
959 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
960 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
961 | goto release; | |
962 | ||
963 | /* The busy flag should be clear again */ | |
964 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
965 | goto release; | |
966 | ||
967 | /* Explicitly prevent the misdetection of Winbond chips */ | |
968 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
969 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
970 | if (val == 0xa3 || val == 0x5c) | |
971 | goto release; | |
972 | ||
973 | /* Explicitly prevent the misdetection of ITE chips */ | |
974 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
975 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
976 | if (val == 0x90) | |
977 | goto release; | |
978 | ||
979 | /* Determine the chip type */ | |
980 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
981 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 982 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
983 | || val == 0x40 /* LM78-J */ |
984 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
985 | found = 1; | |
986 | ||
987 | if (found) | |
ce47da74 | 988 | pr_info("Found an %s chip at %#x\n", |
c40769fe JD |
989 | val & 0x80 ? "LM79" : "LM78", (int)address); |
990 | ||
991 | release: | |
197027e6 JD |
992 | for (port--; port >= address; port--) |
993 | release_region(port, 1); | |
c40769fe JD |
994 | return found; |
995 | } | |
996 | ||
997 | static int __init lm78_isa_device_add(unsigned short address) | |
998 | { | |
999 | struct resource res = { | |
1000 | .start = address, | |
15bde2f1 | 1001 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
1002 | .name = "lm78", |
1003 | .flags = IORESOURCE_IO, | |
1004 | }; | |
1005 | int err; | |
1006 | ||
1007 | pdev = platform_device_alloc("lm78", address); | |
1008 | if (!pdev) { | |
1009 | err = -ENOMEM; | |
ce47da74 | 1010 | pr_err("Device allocation failed\n"); |
c40769fe JD |
1011 | goto exit; |
1012 | } | |
1013 | ||
1014 | err = platform_device_add_resources(pdev, &res, 1); | |
1015 | if (err) { | |
ce47da74 | 1016 | pr_err("Device resource addition failed (%d)\n", err); |
c40769fe JD |
1017 | goto exit_device_put; |
1018 | } | |
1019 | ||
1020 | err = platform_device_add(pdev); | |
1021 | if (err) { | |
ce47da74 | 1022 | pr_err("Device addition failed (%d)\n", err); |
c40769fe JD |
1023 | goto exit_device_put; |
1024 | } | |
1025 | ||
1026 | return 0; | |
1027 | ||
1028 | exit_device_put: | |
1029 | platform_device_put(pdev); | |
1030 | exit: | |
1031 | pdev = NULL; | |
1032 | return err; | |
1033 | } | |
1034 | ||
90534c5c | 1035 | static int __init lm78_isa_register(void) |
1da177e4 | 1036 | { |
fde09509 JD |
1037 | int res; |
1038 | ||
c40769fe JD |
1039 | if (lm78_isa_found(isa_address)) { |
1040 | res = platform_driver_register(&lm78_isa_driver); | |
1041 | if (res) | |
18c73f90 | 1042 | goto exit; |
fde09509 | 1043 | |
c40769fe JD |
1044 | /* Sets global pdev as a side effect */ |
1045 | res = lm78_isa_device_add(isa_address); | |
1046 | if (res) | |
1047 | goto exit_unreg_isa_driver; | |
1048 | } | |
fde09509 JD |
1049 | |
1050 | return 0; | |
c40769fe JD |
1051 | |
1052 | exit_unreg_isa_driver: | |
1053 | platform_driver_unregister(&lm78_isa_driver); | |
c40769fe JD |
1054 | exit: |
1055 | return res; | |
1da177e4 LT |
1056 | } |
1057 | ||
90534c5c | 1058 | static void lm78_isa_unregister(void) |
1da177e4 | 1059 | { |
c40769fe JD |
1060 | if (pdev) { |
1061 | platform_device_unregister(pdev); | |
1062 | platform_driver_unregister(&lm78_isa_driver); | |
1063 | } | |
90534c5c JD |
1064 | } |
1065 | #else /* !CONFIG_ISA */ | |
1066 | ||
1067 | static int __init lm78_isa_register(void) | |
1068 | { | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | static void lm78_isa_unregister(void) | |
1073 | { | |
1074 | } | |
1075 | #endif /* CONFIG_ISA */ | |
1076 | ||
1077 | static int __init sm_lm78_init(void) | |
1078 | { | |
1079 | int res; | |
1080 | ||
9b03079f GR |
1081 | /* |
1082 | * We register the ISA device first, so that we can skip the | |
1083 | * registration of an I2C interface to the same device. | |
1084 | */ | |
90534c5c JD |
1085 | res = lm78_isa_register(); |
1086 | if (res) | |
1087 | goto exit; | |
1088 | ||
1089 | res = i2c_add_driver(&lm78_driver); | |
1090 | if (res) | |
1091 | goto exit_unreg_isa_device; | |
1092 | ||
1093 | return 0; | |
1094 | ||
1095 | exit_unreg_isa_device: | |
1096 | lm78_isa_unregister(); | |
1097 | exit: | |
1098 | return res; | |
1099 | } | |
1100 | ||
1101 | static void __exit sm_lm78_exit(void) | |
1102 | { | |
1103 | lm78_isa_unregister(); | |
1da177e4 LT |
1104 | i2c_del_driver(&lm78_driver); |
1105 | } | |
1106 | ||
156e2d1a | 1107 | MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <khali@linux-fr.org>"); |
27fe048e | 1108 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
1109 | MODULE_LICENSE("GPL"); |
1110 | ||
1111 | module_init(sm_lm78_init); | |
1112 | module_exit(sm_lm78_exit); |