Commit | Line | Data |
---|---|---|
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 | { | |
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; | |
2a844c14 | 97 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
1da177e4 LT |
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 | { | |
2a844c14 | 111 | int nval = clamp_val(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: |
b55f3757 GR |
389 | dev_err(dev, |
390 | "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", | |
391 | val); | |
9a61bf63 | 392 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
393 | return -EINVAL; |
394 | } | |
395 | ||
c59cc301 | 396 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
1da177e4 LT |
397 | switch (nr) { |
398 | case 0: | |
399 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
400 | break; | |
401 | case 1: | |
402 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
403 | break; | |
404 | } | |
c59cc301 | 405 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
1da177e4 LT |
406 | |
407 | data->fan_min[nr] = | |
408 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
c59cc301 | 409 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 410 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
411 | |
412 | return count; | |
413 | } | |
414 | ||
247dde4c JD |
415 | #define show_fan_offset(offset) \ |
416 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
417 | show_fan, NULL, offset - 1); \ | |
418 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
419 | show_fan_min, set_fan_min, offset - 1); | |
1da177e4 LT |
420 | |
421 | show_fan_offset(1); | |
422 | show_fan_offset(2); | |
423 | show_fan_offset(3); | |
424 | ||
425 | /* Fan 3 divisor is locked in H/W */ | |
247dde4c JD |
426 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
427 | show_fan_div, set_fan_div, 0); | |
428 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
429 | show_fan_div, set_fan_div, 1); | |
430 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); | |
1da177e4 LT |
431 | |
432 | /* VID */ | |
247dde4c JD |
433 | static ssize_t show_vid(struct device *dev, struct device_attribute *da, |
434 | char *buf) | |
1da177e4 LT |
435 | { |
436 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 437 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 LT |
438 | } |
439 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
440 | ||
441 | /* Alarms */ | |
247dde4c JD |
442 | static ssize_t show_alarms(struct device *dev, struct device_attribute *da, |
443 | char *buf) | |
1da177e4 LT |
444 | { |
445 | struct lm78_data *data = lm78_update_device(dev); | |
446 | return sprintf(buf, "%u\n", data->alarms); | |
447 | } | |
448 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
449 | ||
428a7039 JD |
450 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
451 | char *buf) | |
452 | { | |
453 | struct lm78_data *data = lm78_update_device(dev); | |
454 | int nr = to_sensor_dev_attr(da)->index; | |
455 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
456 | } | |
457 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
458 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
459 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
460 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
461 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
462 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
463 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); | |
464 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
465 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
466 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
467 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
468 | ||
c1685f61 | 469 | static struct attribute *lm78_attributes[] = { |
247dde4c JD |
470 | &sensor_dev_attr_in0_input.dev_attr.attr, |
471 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
472 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 473 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
474 | &sensor_dev_attr_in1_input.dev_attr.attr, |
475 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
476 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 477 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
478 | &sensor_dev_attr_in2_input.dev_attr.attr, |
479 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
480 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 481 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
482 | &sensor_dev_attr_in3_input.dev_attr.attr, |
483 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
484 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 485 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
486 | &sensor_dev_attr_in4_input.dev_attr.attr, |
487 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
488 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 489 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
490 | &sensor_dev_attr_in5_input.dev_attr.attr, |
491 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
492 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 493 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
494 | &sensor_dev_attr_in6_input.dev_attr.attr, |
495 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
496 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 497 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
498 | &dev_attr_temp1_input.attr, |
499 | &dev_attr_temp1_max.attr, | |
500 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 501 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
502 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
503 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
504 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 505 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
506 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
507 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
508 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 509 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
510 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
511 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
512 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 513 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
514 | &dev_attr_alarms.attr, |
515 | &dev_attr_cpu0_vid.attr, | |
516 | ||
517 | NULL | |
518 | }; | |
519 | ||
520 | static const struct attribute_group lm78_group = { | |
521 | .attrs = lm78_attributes, | |
522 | }; | |
523 | ||
90534c5c JD |
524 | /* |
525 | * ISA related code | |
526 | */ | |
527 | #ifdef CONFIG_ISA | |
528 | ||
529 | /* ISA device, if found */ | |
530 | static struct platform_device *pdev; | |
531 | ||
532 | static unsigned short isa_address = 0x290; | |
533 | ||
9b03079f GR |
534 | /* |
535 | * I2C devices get this name attribute automatically, but for ISA devices | |
536 | * we must create it by ourselves. | |
537 | */ | |
c40769fe JD |
538 | static ssize_t show_name(struct device *dev, struct device_attribute |
539 | *devattr, char *buf) | |
540 | { | |
541 | struct lm78_data *data = dev_get_drvdata(dev); | |
542 | ||
6e1b5029 | 543 | return sprintf(buf, "%s\n", data->name); |
c40769fe JD |
544 | } |
545 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
546 | ||
90534c5c JD |
547 | static struct lm78_data *lm78_data_if_isa(void) |
548 | { | |
549 | return pdev ? platform_get_drvdata(pdev) : NULL; | |
550 | } | |
551 | ||
18c73f90 JD |
552 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
553 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
554 | { | |
0c6e9731 | 555 | struct lm78_data *isa; |
18c73f90 JD |
556 | int i; |
557 | ||
558 | if (!pdev) /* No ISA chip */ | |
559 | return 0; | |
18c73f90 JD |
560 | isa = platform_get_drvdata(pdev); |
561 | ||
562 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
563 | return 0; /* Address doesn't match */ | |
564 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
565 | return 0; /* Chip type doesn't match */ | |
566 | ||
9b03079f GR |
567 | /* |
568 | * We compare all the limit registers, the config register and the | |
569 | * interrupt mask registers | |
570 | */ | |
18c73f90 | 571 | for (i = 0x2b; i <= 0x3d; i++) { |
0c6e9731 JD |
572 | if (lm78_read_value(isa, i) != |
573 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
574 | return 0; |
575 | } | |
576 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 577 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
578 | return 0; |
579 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
580 | if (lm78_read_value(isa, i) != |
581 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
582 | return 0; |
583 | } | |
584 | ||
585 | return 1; | |
586 | } | |
90534c5c JD |
587 | #else /* !CONFIG_ISA */ |
588 | ||
589 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
590 | { | |
591 | return 0; | |
592 | } | |
593 | ||
594 | static struct lm78_data *lm78_data_if_isa(void) | |
595 | { | |
596 | return NULL; | |
597 | } | |
598 | #endif /* CONFIG_ISA */ | |
18c73f90 | 599 | |
310ec792 | 600 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 601 | struct i2c_board_info *info) |
1da177e4 | 602 | { |
0c6e9731 | 603 | int i; |
90534c5c | 604 | struct lm78_data *isa = lm78_data_if_isa(); |
0c6e9731 JD |
605 | const char *client_name; |
606 | struct i2c_adapter *adapter = client->adapter; | |
607 | int address = client->addr; | |
1da177e4 | 608 | |
0c6e9731 JD |
609 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
610 | return -ENODEV; | |
1da177e4 | 611 | |
9b03079f GR |
612 | /* |
613 | * We block updates of the ISA device to minimize the risk of | |
614 | * concurrent access to the same LM78 chip through different | |
615 | * interfaces. | |
616 | */ | |
0c6e9731 JD |
617 | if (isa) |
618 | mutex_lock(&isa->update_lock); | |
1da177e4 | 619 | |
52df6440 JD |
620 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
621 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
622 | goto err_nodev; | |
623 | ||
624 | /* Explicitly prevent the misdetection of Winbond chips */ | |
625 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
626 | if (i == 0xa3 || i == 0x5c) | |
627 | goto err_nodev; | |
1da177e4 LT |
628 | |
629 | /* Determine the chip type. */ | |
52df6440 JD |
630 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
631 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
632 | || i == 0x40) /* LM78-J */ | |
633 | client_name = "lm78"; | |
634 | else if ((i & 0xfe) == 0xc0) | |
635 | client_name = "lm79"; | |
636 | else | |
637 | goto err_nodev; | |
638 | ||
639 | if (lm78_alias_detect(client, i)) { | |
b55f3757 GR |
640 | dev_dbg(&adapter->dev, |
641 | "Device at 0x%02x appears to be the same as ISA device\n", | |
642 | address); | |
52df6440 | 643 | goto err_nodev; |
1da177e4 LT |
644 | } |
645 | ||
0c6e9731 JD |
646 | if (isa) |
647 | mutex_unlock(&isa->update_lock); | |
648 | ||
0c6e9731 | 649 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 650 | |
0c6e9731 | 651 | return 0; |
1da177e4 | 652 | |
0c6e9731 JD |
653 | err_nodev: |
654 | if (isa) | |
655 | mutex_unlock(&isa->update_lock); | |
656 | return -ENODEV; | |
657 | } | |
658 | ||
659 | static int lm78_i2c_probe(struct i2c_client *client, | |
660 | const struct i2c_device_id *id) | |
661 | { | |
662 | struct lm78_data *data; | |
663 | int err; | |
664 | ||
7b7bb90c | 665 | data = devm_kzalloc(&client->dev, sizeof(struct lm78_data), GFP_KERNEL); |
0c6e9731 JD |
666 | if (!data) |
667 | return -ENOMEM; | |
668 | ||
669 | i2c_set_clientdata(client, data); | |
670 | data->client = client; | |
671 | data->type = id->driver_data; | |
1da177e4 LT |
672 | |
673 | /* Initialize the LM78 chip */ | |
c59cc301 | 674 | lm78_init_device(data); |
1da177e4 | 675 | |
1da177e4 | 676 | /* Register sysfs hooks */ |
0c6e9731 JD |
677 | err = sysfs_create_group(&client->dev.kobj, &lm78_group); |
678 | if (err) | |
7b7bb90c | 679 | return err; |
c1685f61 | 680 | |
0c6e9731 | 681 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
682 | if (IS_ERR(data->hwmon_dev)) { |
683 | err = PTR_ERR(data->hwmon_dev); | |
7b7bb90c | 684 | goto error; |
943b0830 MH |
685 | } |
686 | ||
1da177e4 LT |
687 | return 0; |
688 | ||
7b7bb90c | 689 | error: |
0c6e9731 | 690 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
1da177e4 LT |
691 | return err; |
692 | } | |
693 | ||
0c6e9731 | 694 | static int lm78_i2c_remove(struct i2c_client *client) |
1da177e4 | 695 | { |
943b0830 | 696 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 | 697 | |
1beeffe4 | 698 | hwmon_device_unregister(data->hwmon_dev); |
c1685f61 | 699 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
c40769fe JD |
700 | |
701 | return 0; | |
702 | } | |
703 | ||
ed4cebdf JD |
704 | static const struct i2c_device_id lm78_i2c_id[] = { |
705 | { "lm78", lm78 }, | |
706 | { "lm79", lm79 }, | |
707 | { } | |
708 | }; | |
709 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
6e1b5029 | 710 | |
ed4cebdf JD |
711 | static struct i2c_driver lm78_driver = { |
712 | .class = I2C_CLASS_HWMON, | |
713 | .driver = { | |
714 | .name = "lm78", | |
715 | }, | |
716 | .probe = lm78_i2c_probe, | |
717 | .remove = lm78_i2c_remove, | |
718 | .id_table = lm78_i2c_id, | |
719 | .detect = lm78_i2c_detect, | |
720 | .address_list = normal_i2c, | |
721 | }; | |
1da177e4 | 722 | |
9b03079f GR |
723 | /* |
724 | * The SMBus locks itself, but ISA access must be locked explicitly! | |
725 | * We don't want to lock the whole ISA bus, so we lock each client | |
726 | * separately. | |
727 | * We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
728 | * would slow down the LM78 access and should not be necessary. | |
729 | */ | |
c59cc301 | 730 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 731 | { |
0c6e9731 | 732 | struct i2c_client *client = data->client; |
c59cc301 | 733 | |
90534c5c | 734 | #ifdef CONFIG_ISA |
0c6e9731 | 735 | if (!client) { /* ISA device */ |
c59cc301 | 736 | int res; |
9a61bf63 | 737 | mutex_lock(&data->lock); |
6e1b5029 JD |
738 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
739 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 740 | mutex_unlock(&data->lock); |
1da177e4 LT |
741 | return res; |
742 | } else | |
90534c5c | 743 | #endif |
1da177e4 LT |
744 | return i2c_smbus_read_byte_data(client, reg); |
745 | } | |
746 | ||
c59cc301 | 747 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 748 | { |
0c6e9731 | 749 | struct i2c_client *client = data->client; |
c59cc301 | 750 | |
90534c5c | 751 | #ifdef CONFIG_ISA |
0c6e9731 | 752 | if (!client) { /* ISA device */ |
9a61bf63 | 753 | mutex_lock(&data->lock); |
6e1b5029 JD |
754 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
755 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 756 | mutex_unlock(&data->lock); |
1da177e4 LT |
757 | return 0; |
758 | } else | |
90534c5c | 759 | #endif |
1da177e4 LT |
760 | return i2c_smbus_write_byte_data(client, reg, value); |
761 | } | |
762 | ||
c59cc301 | 763 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 764 | { |
c40769fe JD |
765 | u8 config; |
766 | int i; | |
1da177e4 LT |
767 | |
768 | /* Start monitoring */ | |
c59cc301 | 769 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 770 | if ((config & 0x09) != 0x01) |
c59cc301 | 771 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 772 | (config & 0xf7) | 0x01); |
c40769fe JD |
773 | |
774 | /* A few vars need to be filled upon startup */ | |
775 | for (i = 0; i < 3; i++) { | |
c59cc301 | 776 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
777 | LM78_REG_FAN_MIN(i)); |
778 | } | |
779 | ||
780 | mutex_init(&data->update_lock); | |
1da177e4 LT |
781 | } |
782 | ||
783 | static struct lm78_data *lm78_update_device(struct device *dev) | |
784 | { | |
c40769fe | 785 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
786 | int i; |
787 | ||
9a61bf63 | 788 | mutex_lock(&data->update_lock); |
1da177e4 LT |
789 | |
790 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
791 | || !data->valid) { | |
792 | ||
c40769fe | 793 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
794 | |
795 | for (i = 0; i <= 6; i++) { | |
796 | data->in[i] = | |
c59cc301 | 797 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 798 | data->in_min[i] = |
c59cc301 | 799 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 800 | data->in_max[i] = |
c59cc301 | 801 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
802 | } |
803 | for (i = 0; i < 3; i++) { | |
804 | data->fan[i] = | |
c59cc301 | 805 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 806 | data->fan_min[i] = |
c59cc301 | 807 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 808 | } |
c59cc301 | 809 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 810 | data->temp_over = |
c59cc301 | 811 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 812 | data->temp_hyst = |
c59cc301 JD |
813 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
814 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
815 | data->vid = i & 0x0f; |
816 | if (data->type == lm79) | |
817 | data->vid |= | |
c59cc301 | 818 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
819 | 0x01) << 4; |
820 | else | |
821 | data->vid |= 0x10; | |
822 | data->fan_div[0] = (i >> 4) & 0x03; | |
823 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
824 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
825 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
826 | data->last_updated = jiffies; |
827 | data->valid = 1; | |
828 | ||
829 | data->fan_div[2] = 1; | |
830 | } | |
831 | ||
9a61bf63 | 832 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
833 | |
834 | return data; | |
835 | } | |
836 | ||
90534c5c | 837 | #ifdef CONFIG_ISA |
6c931ae1 | 838 | static int lm78_isa_probe(struct platform_device *pdev) |
ed4cebdf JD |
839 | { |
840 | int err; | |
841 | struct lm78_data *data; | |
842 | struct resource *res; | |
843 | ||
844 | /* Reserve the ISA region */ | |
845 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
7b7bb90c GR |
846 | if (!devm_request_region(&pdev->dev, res->start + LM78_ADDR_REG_OFFSET, |
847 | 2, "lm78")) | |
848 | return -EBUSY; | |
849 | ||
850 | data = devm_kzalloc(&pdev->dev, sizeof(struct lm78_data), GFP_KERNEL); | |
851 | if (!data) | |
852 | return -ENOMEM; | |
ed4cebdf | 853 | |
ed4cebdf JD |
854 | mutex_init(&data->lock); |
855 | data->isa_addr = res->start; | |
856 | platform_set_drvdata(pdev, data); | |
857 | ||
858 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { | |
859 | data->type = lm79; | |
860 | data->name = "lm79"; | |
861 | } else { | |
862 | data->type = lm78; | |
863 | data->name = "lm78"; | |
864 | } | |
865 | ||
866 | /* Initialize the LM78 chip */ | |
867 | lm78_init_device(data); | |
868 | ||
869 | /* Register sysfs hooks */ | |
9b03079f GR |
870 | err = sysfs_create_group(&pdev->dev.kobj, &lm78_group); |
871 | if (err) | |
872 | goto exit_remove_files; | |
873 | err = device_create_file(&pdev->dev, &dev_attr_name); | |
874 | if (err) | |
ed4cebdf JD |
875 | goto exit_remove_files; |
876 | ||
877 | data->hwmon_dev = hwmon_device_register(&pdev->dev); | |
878 | if (IS_ERR(data->hwmon_dev)) { | |
879 | err = PTR_ERR(data->hwmon_dev); | |
880 | goto exit_remove_files; | |
881 | } | |
882 | ||
883 | return 0; | |
884 | ||
885 | exit_remove_files: | |
886 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
887 | device_remove_file(&pdev->dev, &dev_attr_name); | |
ed4cebdf JD |
888 | return err; |
889 | } | |
890 | ||
281dfd0b | 891 | static int lm78_isa_remove(struct platform_device *pdev) |
ed4cebdf JD |
892 | { |
893 | struct lm78_data *data = platform_get_drvdata(pdev); | |
ed4cebdf JD |
894 | |
895 | hwmon_device_unregister(data->hwmon_dev); | |
896 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
897 | device_remove_file(&pdev->dev, &dev_attr_name); | |
ed4cebdf JD |
898 | |
899 | return 0; | |
900 | } | |
901 | ||
902 | static struct platform_driver lm78_isa_driver = { | |
903 | .driver = { | |
904 | .owner = THIS_MODULE, | |
905 | .name = "lm78", | |
906 | }, | |
907 | .probe = lm78_isa_probe, | |
9e5e9b7a | 908 | .remove = lm78_isa_remove, |
ed4cebdf JD |
909 | }; |
910 | ||
c40769fe JD |
911 | /* return 1 if a supported chip is found, 0 otherwise */ |
912 | static int __init lm78_isa_found(unsigned short address) | |
913 | { | |
914 | int val, save, found = 0; | |
197027e6 JD |
915 | int port; |
916 | ||
9b03079f GR |
917 | /* |
918 | * Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
197027e6 | 919 | * to base+7 and some base+5 to base+6. So we better request each port |
9b03079f GR |
920 | * individually for the probing phase. |
921 | */ | |
197027e6 JD |
922 | for (port = address; port < address + LM78_EXTENT; port++) { |
923 | if (!request_region(port, 1, "lm78")) { | |
ce47da74 | 924 | pr_debug("Failed to request port 0x%x\n", port); |
197027e6 JD |
925 | goto release; |
926 | } | |
47c15532 | 927 | } |
c40769fe JD |
928 | |
929 | #define REALLY_SLOW_IO | |
9b03079f GR |
930 | /* |
931 | * We need the timeouts for at least some LM78-like | |
932 | * chips. But only if we read 'undefined' registers. | |
933 | */ | |
c40769fe JD |
934 | val = inb_p(address + 1); |
935 | if (inb_p(address + 2) != val | |
936 | || inb_p(address + 3) != val | |
937 | || inb_p(address + 7) != val) | |
938 | goto release; | |
939 | #undef REALLY_SLOW_IO | |
940 | ||
9b03079f GR |
941 | /* |
942 | * We should be able to change the 7 LSB of the address port. The | |
943 | * MSB (busy flag) should be clear initially, set after the write. | |
944 | */ | |
c40769fe JD |
945 | save = inb_p(address + LM78_ADDR_REG_OFFSET); |
946 | if (save & 0x80) | |
947 | goto release; | |
948 | val = ~save & 0x7f; | |
949 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
950 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
951 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
952 | goto release; | |
953 | } | |
954 | ||
955 | /* We found a device, now see if it could be an LM78 */ | |
956 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
957 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
958 | if (val & 0x80) | |
959 | goto release; | |
960 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
961 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
962 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
963 | goto release; | |
964 | ||
965 | /* The busy flag should be clear again */ | |
966 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
967 | goto release; | |
968 | ||
969 | /* Explicitly prevent the misdetection of Winbond chips */ | |
970 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
971 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
972 | if (val == 0xa3 || val == 0x5c) | |
973 | goto release; | |
974 | ||
975 | /* Explicitly prevent the misdetection of ITE chips */ | |
976 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
977 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
978 | if (val == 0x90) | |
979 | goto release; | |
980 | ||
981 | /* Determine the chip type */ | |
982 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
983 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 984 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
985 | || val == 0x40 /* LM78-J */ |
986 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
987 | found = 1; | |
988 | ||
989 | if (found) | |
ce47da74 | 990 | pr_info("Found an %s chip at %#x\n", |
c40769fe JD |
991 | val & 0x80 ? "LM79" : "LM78", (int)address); |
992 | ||
993 | release: | |
197027e6 JD |
994 | for (port--; port >= address; port--) |
995 | release_region(port, 1); | |
c40769fe JD |
996 | return found; |
997 | } | |
998 | ||
999 | static int __init lm78_isa_device_add(unsigned short address) | |
1000 | { | |
1001 | struct resource res = { | |
1002 | .start = address, | |
15bde2f1 | 1003 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
1004 | .name = "lm78", |
1005 | .flags = IORESOURCE_IO, | |
1006 | }; | |
1007 | int err; | |
1008 | ||
1009 | pdev = platform_device_alloc("lm78", address); | |
1010 | if (!pdev) { | |
1011 | err = -ENOMEM; | |
ce47da74 | 1012 | pr_err("Device allocation failed\n"); |
c40769fe JD |
1013 | goto exit; |
1014 | } | |
1015 | ||
1016 | err = platform_device_add_resources(pdev, &res, 1); | |
1017 | if (err) { | |
ce47da74 | 1018 | pr_err("Device resource addition failed (%d)\n", err); |
c40769fe JD |
1019 | goto exit_device_put; |
1020 | } | |
1021 | ||
1022 | err = platform_device_add(pdev); | |
1023 | if (err) { | |
ce47da74 | 1024 | pr_err("Device addition failed (%d)\n", err); |
c40769fe JD |
1025 | goto exit_device_put; |
1026 | } | |
1027 | ||
1028 | return 0; | |
1029 | ||
1030 | exit_device_put: | |
1031 | platform_device_put(pdev); | |
1032 | exit: | |
1033 | pdev = NULL; | |
1034 | return err; | |
1035 | } | |
1036 | ||
90534c5c | 1037 | static int __init lm78_isa_register(void) |
1da177e4 | 1038 | { |
fde09509 JD |
1039 | int res; |
1040 | ||
c40769fe JD |
1041 | if (lm78_isa_found(isa_address)) { |
1042 | res = platform_driver_register(&lm78_isa_driver); | |
1043 | if (res) | |
18c73f90 | 1044 | goto exit; |
fde09509 | 1045 | |
c40769fe JD |
1046 | /* Sets global pdev as a side effect */ |
1047 | res = lm78_isa_device_add(isa_address); | |
1048 | if (res) | |
1049 | goto exit_unreg_isa_driver; | |
1050 | } | |
fde09509 JD |
1051 | |
1052 | return 0; | |
c40769fe JD |
1053 | |
1054 | exit_unreg_isa_driver: | |
1055 | platform_driver_unregister(&lm78_isa_driver); | |
c40769fe JD |
1056 | exit: |
1057 | return res; | |
1da177e4 LT |
1058 | } |
1059 | ||
90534c5c | 1060 | static void lm78_isa_unregister(void) |
1da177e4 | 1061 | { |
c40769fe JD |
1062 | if (pdev) { |
1063 | platform_device_unregister(pdev); | |
1064 | platform_driver_unregister(&lm78_isa_driver); | |
1065 | } | |
90534c5c JD |
1066 | } |
1067 | #else /* !CONFIG_ISA */ | |
1068 | ||
1069 | static int __init lm78_isa_register(void) | |
1070 | { | |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static void lm78_isa_unregister(void) | |
1075 | { | |
1076 | } | |
1077 | #endif /* CONFIG_ISA */ | |
1078 | ||
1079 | static int __init sm_lm78_init(void) | |
1080 | { | |
1081 | int res; | |
1082 | ||
9b03079f GR |
1083 | /* |
1084 | * We register the ISA device first, so that we can skip the | |
1085 | * registration of an I2C interface to the same device. | |
1086 | */ | |
90534c5c JD |
1087 | res = lm78_isa_register(); |
1088 | if (res) | |
1089 | goto exit; | |
1090 | ||
1091 | res = i2c_add_driver(&lm78_driver); | |
1092 | if (res) | |
1093 | goto exit_unreg_isa_device; | |
1094 | ||
1095 | return 0; | |
1096 | ||
1097 | exit_unreg_isa_device: | |
1098 | lm78_isa_unregister(); | |
1099 | exit: | |
1100 | return res; | |
1101 | } | |
1102 | ||
1103 | static void __exit sm_lm78_exit(void) | |
1104 | { | |
1105 | lm78_isa_unregister(); | |
1da177e4 LT |
1106 | i2c_del_driver(&lm78_driver); |
1107 | } | |
1108 | ||
156e2d1a | 1109 | MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <khali@linux-fr.org>"); |
27fe048e | 1110 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
1111 | MODULE_LICENSE("GPL"); |
1112 | ||
1113 | module_init(sm_lm78_init); | |
1114 | module_exit(sm_lm78_exit); |