Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | lm78.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | monitoring | |
4 | Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
90534c5c | 5 | Copyright (c) 2007, 2011 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
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 | */ | |
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 | ||
77 | /* Conversions. Rounding and limit checking is only done on the TO_REG | |
78 | variants. */ | |
79 | ||
80 | /* IN: mV, (0V to 4.08V) | |
81 | REG: 16mV/bit */ | |
82 | static inline u8 IN_TO_REG(unsigned long val) | |
83 | { | |
84 | unsigned long nval = SENSORS_LIMIT(val, 0, 4080); | |
85 | return (nval + 8) / 16; | |
86 | } | |
87 | #define IN_FROM_REG(val) ((val) * 16) | |
88 | ||
89 | static inline u8 FAN_TO_REG(long rpm, int div) | |
90 | { | |
91 | if (rpm <= 0) | |
92 | return 255; | |
93 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
94 | } | |
95 | ||
96 | static inline int FAN_FROM_REG(u8 val, int div) | |
97 | { | |
98 | return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); | |
99 | } | |
100 | ||
101 | /* TEMP: mC (-128C to +127C) | |
102 | REG: 1C/bit, two's complement */ | |
103 | static inline s8 TEMP_TO_REG(int val) | |
104 | { | |
105 | int nval = SENSORS_LIMIT(val, -128000, 127000) ; | |
106 | return nval<0 ? (nval-500)/1000 : (nval+500)/1000; | |
107 | } | |
108 | ||
109 | static inline int TEMP_FROM_REG(s8 val) | |
110 | { | |
111 | return val * 1000; | |
112 | } | |
113 | ||
1da177e4 LT |
114 | #define DIV_FROM_REG(val) (1 << (val)) |
115 | ||
1da177e4 | 116 | struct lm78_data { |
0c6e9731 | 117 | struct i2c_client *client; |
1beeffe4 | 118 | struct device *hwmon_dev; |
9a61bf63 | 119 | struct mutex lock; |
1da177e4 LT |
120 | enum chips type; |
121 | ||
6e1b5029 JD |
122 | /* For ISA device only */ |
123 | const char *name; | |
124 | int isa_addr; | |
125 | ||
9a61bf63 | 126 | struct mutex update_lock; |
1da177e4 LT |
127 | char valid; /* !=0 if following fields are valid */ |
128 | unsigned long last_updated; /* In jiffies */ | |
129 | ||
130 | u8 in[7]; /* Register value */ | |
131 | u8 in_max[7]; /* Register value */ | |
132 | u8 in_min[7]; /* Register value */ | |
133 | u8 fan[3]; /* Register value */ | |
134 | u8 fan_min[3]; /* Register value */ | |
135 | s8 temp; /* Register value */ | |
136 | s8 temp_over; /* Register value */ | |
137 | s8 temp_hyst; /* Register value */ | |
138 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
139 | u8 vid; /* Register encoding, combined */ | |
140 | u16 alarms; /* Register encoding, combined */ | |
141 | }; | |
142 | ||
143 | ||
c59cc301 JD |
144 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
145 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 146 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 147 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 LT |
148 | |
149 | ||
1da177e4 | 150 | /* 7 Voltages */ |
247dde4c JD |
151 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
152 | char *buf) | |
1da177e4 | 153 | { |
247dde4c | 154 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 155 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 156 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
1da177e4 LT |
157 | } |
158 | ||
247dde4c JD |
159 | static ssize_t show_in_min(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_min[attr->index])); |
1da177e4 LT |
165 | } |
166 | ||
247dde4c JD |
167 | static ssize_t show_in_max(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_max[attr->index])); |
1da177e4 LT |
173 | } |
174 | ||
247dde4c JD |
175 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
176 | const char *buf, size_t count) | |
1da177e4 | 177 | { |
247dde4c | 178 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 179 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 | 180 | unsigned long val = simple_strtoul(buf, NULL, 10); |
247dde4c | 181 | int nr = attr->index; |
1da177e4 | 182 | |
9a61bf63 | 183 | mutex_lock(&data->update_lock); |
1da177e4 | 184 | data->in_min[nr] = IN_TO_REG(val); |
c59cc301 | 185 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
9a61bf63 | 186 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
187 | return count; |
188 | } | |
189 | ||
247dde4c JD |
190 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
191 | const char *buf, size_t count) | |
1da177e4 | 192 | { |
247dde4c | 193 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 194 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 | 195 | unsigned long val = simple_strtoul(buf, NULL, 10); |
247dde4c | 196 | int nr = attr->index; |
1da177e4 | 197 | |
9a61bf63 | 198 | mutex_lock(&data->update_lock); |
1da177e4 | 199 | data->in_max[nr] = IN_TO_REG(val); |
c59cc301 | 200 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
9a61bf63 | 201 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
202 | return count; |
203 | } | |
204 | ||
205 | #define show_in_offset(offset) \ | |
247dde4c JD |
206 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
207 | show_in, NULL, offset); \ | |
208 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
209 | show_in_min, set_in_min, offset); \ | |
210 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
211 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
212 | |
213 | show_in_offset(0); | |
214 | show_in_offset(1); | |
215 | show_in_offset(2); | |
216 | show_in_offset(3); | |
217 | show_in_offset(4); | |
218 | show_in_offset(5); | |
219 | show_in_offset(6); | |
220 | ||
221 | /* Temperature */ | |
247dde4c JD |
222 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
223 | char *buf) | |
1da177e4 LT |
224 | { |
225 | struct lm78_data *data = lm78_update_device(dev); | |
226 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
227 | } | |
228 | ||
247dde4c JD |
229 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
230 | char *buf) | |
1da177e4 LT |
231 | { |
232 | struct lm78_data *data = lm78_update_device(dev); | |
233 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
234 | } | |
235 | ||
247dde4c JD |
236 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
237 | const char *buf, size_t count) | |
1da177e4 | 238 | { |
c40769fe | 239 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
240 | long val = simple_strtol(buf, NULL, 10); |
241 | ||
9a61bf63 | 242 | mutex_lock(&data->update_lock); |
1da177e4 | 243 | data->temp_over = TEMP_TO_REG(val); |
c59cc301 | 244 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
9a61bf63 | 245 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
246 | return count; |
247 | } | |
248 | ||
247dde4c JD |
249 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
250 | char *buf) | |
1da177e4 LT |
251 | { |
252 | struct lm78_data *data = lm78_update_device(dev); | |
253 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
254 | } | |
255 | ||
247dde4c JD |
256 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
257 | const char *buf, size_t count) | |
1da177e4 | 258 | { |
c40769fe | 259 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
260 | long val = simple_strtol(buf, NULL, 10); |
261 | ||
9a61bf63 | 262 | mutex_lock(&data->update_lock); |
1da177e4 | 263 | data->temp_hyst = TEMP_TO_REG(val); |
c59cc301 | 264 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
9a61bf63 | 265 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
266 | return count; |
267 | } | |
268 | ||
269 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
270 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, | |
271 | show_temp_over, set_temp_over); | |
272 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
273 | show_temp_hyst, set_temp_hyst); | |
274 | ||
275 | /* 3 Fans */ | |
247dde4c JD |
276 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
277 | char *buf) | |
1da177e4 | 278 | { |
247dde4c | 279 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 280 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 281 | int nr = attr->index; |
1da177e4 LT |
282 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
283 | DIV_FROM_REG(data->fan_div[nr])) ); | |
284 | } | |
285 | ||
247dde4c JD |
286 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
287 | char *buf) | |
1da177e4 | 288 | { |
247dde4c | 289 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 290 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 291 | int nr = attr->index; |
1da177e4 LT |
292 | return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr], |
293 | DIV_FROM_REG(data->fan_div[nr])) ); | |
294 | } | |
295 | ||
247dde4c JD |
296 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
297 | const char *buf, size_t count) | |
1da177e4 | 298 | { |
247dde4c | 299 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 300 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 301 | int nr = attr->index; |
1da177e4 LT |
302 | unsigned long val = simple_strtoul(buf, NULL, 10); |
303 | ||
9a61bf63 | 304 | mutex_lock(&data->update_lock); |
1da177e4 | 305 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
c59cc301 | 306 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 307 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
308 | return count; |
309 | } | |
310 | ||
247dde4c JD |
311 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
312 | char *buf) | |
1da177e4 | 313 | { |
247dde4c | 314 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 315 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 316 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
317 | } |
318 | ||
319 | /* Note: we save and restore the fan minimum here, because its value is | |
320 | determined in part by the fan divisor. This follows the principle of | |
d6e05edc | 321 | least surprise; the user doesn't expect the fan minimum to change just |
1da177e4 | 322 | because the divisor changed. */ |
247dde4c JD |
323 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
324 | const char *buf, size_t count) | |
1da177e4 | 325 | { |
247dde4c | 326 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 327 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 328 | int nr = attr->index; |
1da177e4 LT |
329 | unsigned long val = simple_strtoul(buf, NULL, 10); |
330 | unsigned long min; | |
331 | u8 reg; | |
332 | ||
9a61bf63 | 333 | mutex_lock(&data->update_lock); |
1da177e4 LT |
334 | min = FAN_FROM_REG(data->fan_min[nr], |
335 | DIV_FROM_REG(data->fan_div[nr])); | |
336 | ||
337 | switch (val) { | |
338 | case 1: data->fan_div[nr] = 0; break; | |
339 | case 2: data->fan_div[nr] = 1; break; | |
340 | case 4: data->fan_div[nr] = 2; break; | |
341 | case 8: data->fan_div[nr] = 3; break; | |
342 | default: | |
c40769fe | 343 | dev_err(dev, "fan_div value %ld not " |
1da177e4 | 344 | "supported. Choose one of 1, 2, 4 or 8!\n", val); |
9a61bf63 | 345 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
346 | return -EINVAL; |
347 | } | |
348 | ||
c59cc301 | 349 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
1da177e4 LT |
350 | switch (nr) { |
351 | case 0: | |
352 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
353 | break; | |
354 | case 1: | |
355 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
356 | break; | |
357 | } | |
c59cc301 | 358 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
1da177e4 LT |
359 | |
360 | data->fan_min[nr] = | |
361 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
c59cc301 | 362 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 363 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
364 | |
365 | return count; | |
366 | } | |
367 | ||
247dde4c JD |
368 | #define show_fan_offset(offset) \ |
369 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
370 | show_fan, NULL, offset - 1); \ | |
371 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
372 | show_fan_min, set_fan_min, offset - 1); | |
1da177e4 LT |
373 | |
374 | show_fan_offset(1); | |
375 | show_fan_offset(2); | |
376 | show_fan_offset(3); | |
377 | ||
378 | /* Fan 3 divisor is locked in H/W */ | |
247dde4c JD |
379 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
380 | show_fan_div, set_fan_div, 0); | |
381 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
382 | show_fan_div, set_fan_div, 1); | |
383 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); | |
1da177e4 LT |
384 | |
385 | /* VID */ | |
247dde4c JD |
386 | static ssize_t show_vid(struct device *dev, struct device_attribute *da, |
387 | char *buf) | |
1da177e4 LT |
388 | { |
389 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 390 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 LT |
391 | } |
392 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
393 | ||
394 | /* Alarms */ | |
247dde4c JD |
395 | static ssize_t show_alarms(struct device *dev, struct device_attribute *da, |
396 | char *buf) | |
1da177e4 LT |
397 | { |
398 | struct lm78_data *data = lm78_update_device(dev); | |
399 | return sprintf(buf, "%u\n", data->alarms); | |
400 | } | |
401 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
402 | ||
428a7039 JD |
403 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
404 | char *buf) | |
405 | { | |
406 | struct lm78_data *data = lm78_update_device(dev); | |
407 | int nr = to_sensor_dev_attr(da)->index; | |
408 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
409 | } | |
410 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
411 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
412 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
413 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
414 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
415 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
416 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); | |
417 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
418 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
419 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
420 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
421 | ||
c1685f61 | 422 | static struct attribute *lm78_attributes[] = { |
247dde4c JD |
423 | &sensor_dev_attr_in0_input.dev_attr.attr, |
424 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
425 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 426 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
427 | &sensor_dev_attr_in1_input.dev_attr.attr, |
428 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
429 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 430 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
431 | &sensor_dev_attr_in2_input.dev_attr.attr, |
432 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
433 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 434 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
435 | &sensor_dev_attr_in3_input.dev_attr.attr, |
436 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
437 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 438 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
439 | &sensor_dev_attr_in4_input.dev_attr.attr, |
440 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
441 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 442 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
443 | &sensor_dev_attr_in5_input.dev_attr.attr, |
444 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
445 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 446 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
447 | &sensor_dev_attr_in6_input.dev_attr.attr, |
448 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
449 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 450 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
451 | &dev_attr_temp1_input.attr, |
452 | &dev_attr_temp1_max.attr, | |
453 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 454 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
455 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
456 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
457 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 458 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
459 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
460 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
461 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 462 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
463 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
464 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
465 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 466 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
467 | &dev_attr_alarms.attr, |
468 | &dev_attr_cpu0_vid.attr, | |
469 | ||
470 | NULL | |
471 | }; | |
472 | ||
473 | static const struct attribute_group lm78_group = { | |
474 | .attrs = lm78_attributes, | |
475 | }; | |
476 | ||
90534c5c JD |
477 | /* |
478 | * ISA related code | |
479 | */ | |
480 | #ifdef CONFIG_ISA | |
481 | ||
482 | /* ISA device, if found */ | |
483 | static struct platform_device *pdev; | |
484 | ||
485 | static unsigned short isa_address = 0x290; | |
486 | ||
c40769fe JD |
487 | /* I2C devices get this name attribute automatically, but for ISA devices |
488 | we must create it by ourselves. */ | |
489 | static ssize_t show_name(struct device *dev, struct device_attribute | |
490 | *devattr, char *buf) | |
491 | { | |
492 | struct lm78_data *data = dev_get_drvdata(dev); | |
493 | ||
6e1b5029 | 494 | return sprintf(buf, "%s\n", data->name); |
c40769fe JD |
495 | } |
496 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
497 | ||
90534c5c JD |
498 | static struct lm78_data *lm78_data_if_isa(void) |
499 | { | |
500 | return pdev ? platform_get_drvdata(pdev) : NULL; | |
501 | } | |
502 | ||
18c73f90 JD |
503 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
504 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
505 | { | |
0c6e9731 | 506 | struct lm78_data *isa; |
18c73f90 JD |
507 | int i; |
508 | ||
509 | if (!pdev) /* No ISA chip */ | |
510 | return 0; | |
18c73f90 JD |
511 | isa = platform_get_drvdata(pdev); |
512 | ||
513 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
514 | return 0; /* Address doesn't match */ | |
515 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
516 | return 0; /* Chip type doesn't match */ | |
517 | ||
518 | /* We compare all the limit registers, the config register and the | |
519 | * interrupt mask registers */ | |
520 | for (i = 0x2b; i <= 0x3d; i++) { | |
0c6e9731 JD |
521 | if (lm78_read_value(isa, i) != |
522 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
523 | return 0; |
524 | } | |
525 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 526 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
527 | return 0; |
528 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
529 | if (lm78_read_value(isa, i) != |
530 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
531 | return 0; |
532 | } | |
533 | ||
534 | return 1; | |
535 | } | |
90534c5c JD |
536 | #else /* !CONFIG_ISA */ |
537 | ||
538 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
539 | { | |
540 | return 0; | |
541 | } | |
542 | ||
543 | static struct lm78_data *lm78_data_if_isa(void) | |
544 | { | |
545 | return NULL; | |
546 | } | |
547 | #endif /* CONFIG_ISA */ | |
18c73f90 | 548 | |
310ec792 | 549 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 550 | struct i2c_board_info *info) |
1da177e4 | 551 | { |
0c6e9731 | 552 | int i; |
90534c5c | 553 | struct lm78_data *isa = lm78_data_if_isa(); |
0c6e9731 JD |
554 | const char *client_name; |
555 | struct i2c_adapter *adapter = client->adapter; | |
556 | int address = client->addr; | |
1da177e4 | 557 | |
0c6e9731 JD |
558 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
559 | return -ENODEV; | |
1da177e4 | 560 | |
0c6e9731 JD |
561 | /* We block updates of the ISA device to minimize the risk of |
562 | concurrent access to the same LM78 chip through different | |
563 | interfaces. */ | |
564 | if (isa) | |
565 | mutex_lock(&isa->update_lock); | |
1da177e4 | 566 | |
52df6440 JD |
567 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
568 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
569 | goto err_nodev; | |
570 | ||
571 | /* Explicitly prevent the misdetection of Winbond chips */ | |
572 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
573 | if (i == 0xa3 || i == 0x5c) | |
574 | goto err_nodev; | |
1da177e4 LT |
575 | |
576 | /* Determine the chip type. */ | |
52df6440 JD |
577 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
578 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
579 | || i == 0x40) /* LM78-J */ | |
580 | client_name = "lm78"; | |
581 | else if ((i & 0xfe) == 0xc0) | |
582 | client_name = "lm79"; | |
583 | else | |
584 | goto err_nodev; | |
585 | ||
586 | if (lm78_alias_detect(client, i)) { | |
587 | dev_dbg(&adapter->dev, "Device at 0x%02x appears to " | |
588 | "be the same as ISA device\n", address); | |
589 | goto err_nodev; | |
1da177e4 LT |
590 | } |
591 | ||
0c6e9731 JD |
592 | if (isa) |
593 | mutex_unlock(&isa->update_lock); | |
594 | ||
0c6e9731 | 595 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 596 | |
0c6e9731 | 597 | return 0; |
1da177e4 | 598 | |
0c6e9731 JD |
599 | err_nodev: |
600 | if (isa) | |
601 | mutex_unlock(&isa->update_lock); | |
602 | return -ENODEV; | |
603 | } | |
604 | ||
605 | static int lm78_i2c_probe(struct i2c_client *client, | |
606 | const struct i2c_device_id *id) | |
607 | { | |
608 | struct lm78_data *data; | |
609 | int err; | |
610 | ||
611 | data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL); | |
612 | if (!data) | |
613 | return -ENOMEM; | |
614 | ||
615 | i2c_set_clientdata(client, data); | |
616 | data->client = client; | |
617 | data->type = id->driver_data; | |
1da177e4 LT |
618 | |
619 | /* Initialize the LM78 chip */ | |
c59cc301 | 620 | lm78_init_device(data); |
1da177e4 | 621 | |
1da177e4 | 622 | /* Register sysfs hooks */ |
0c6e9731 JD |
623 | err = sysfs_create_group(&client->dev.kobj, &lm78_group); |
624 | if (err) | |
c1685f61 MH |
625 | goto ERROR3; |
626 | ||
0c6e9731 | 627 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
628 | if (IS_ERR(data->hwmon_dev)) { |
629 | err = PTR_ERR(data->hwmon_dev); | |
c1685f61 | 630 | goto ERROR4; |
943b0830 MH |
631 | } |
632 | ||
1da177e4 LT |
633 | return 0; |
634 | ||
c1685f61 | 635 | ERROR4: |
0c6e9731 | 636 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
943b0830 | 637 | ERROR3: |
1da177e4 | 638 | kfree(data); |
1da177e4 LT |
639 | return err; |
640 | } | |
641 | ||
0c6e9731 | 642 | static int lm78_i2c_remove(struct i2c_client *client) |
1da177e4 | 643 | { |
943b0830 | 644 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 | 645 | |
1beeffe4 | 646 | hwmon_device_unregister(data->hwmon_dev); |
c1685f61 | 647 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
c40769fe JD |
648 | kfree(data); |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
ed4cebdf JD |
653 | static const struct i2c_device_id lm78_i2c_id[] = { |
654 | { "lm78", lm78 }, | |
655 | { "lm79", lm79 }, | |
656 | { } | |
657 | }; | |
658 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
6e1b5029 | 659 | |
ed4cebdf JD |
660 | static struct i2c_driver lm78_driver = { |
661 | .class = I2C_CLASS_HWMON, | |
662 | .driver = { | |
663 | .name = "lm78", | |
664 | }, | |
665 | .probe = lm78_i2c_probe, | |
666 | .remove = lm78_i2c_remove, | |
667 | .id_table = lm78_i2c_id, | |
668 | .detect = lm78_i2c_detect, | |
669 | .address_list = normal_i2c, | |
670 | }; | |
1da177e4 | 671 | |
44bbe87e | 672 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
1da177e4 LT |
673 | We don't want to lock the whole ISA bus, so we lock each client |
674 | separately. | |
675 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
676 | would slow down the LM78 access and should not be necessary. */ | |
c59cc301 | 677 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 678 | { |
0c6e9731 | 679 | struct i2c_client *client = data->client; |
c59cc301 | 680 | |
90534c5c | 681 | #ifdef CONFIG_ISA |
0c6e9731 | 682 | if (!client) { /* ISA device */ |
c59cc301 | 683 | int res; |
9a61bf63 | 684 | mutex_lock(&data->lock); |
6e1b5029 JD |
685 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
686 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 687 | mutex_unlock(&data->lock); |
1da177e4 LT |
688 | return res; |
689 | } else | |
90534c5c | 690 | #endif |
1da177e4 LT |
691 | return i2c_smbus_read_byte_data(client, reg); |
692 | } | |
693 | ||
44bbe87e | 694 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
1da177e4 LT |
695 | We don't want to lock the whole ISA bus, so we lock each client |
696 | separately. | |
697 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
698 | would slow down the LM78 access and should not be necessary. | |
699 | There are some ugly typecasts here, but the good new is - they should | |
700 | nowhere else be necessary! */ | |
c59cc301 | 701 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 702 | { |
0c6e9731 | 703 | struct i2c_client *client = data->client; |
c59cc301 | 704 | |
90534c5c | 705 | #ifdef CONFIG_ISA |
0c6e9731 | 706 | if (!client) { /* ISA device */ |
9a61bf63 | 707 | mutex_lock(&data->lock); |
6e1b5029 JD |
708 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
709 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 710 | mutex_unlock(&data->lock); |
1da177e4 LT |
711 | return 0; |
712 | } else | |
90534c5c | 713 | #endif |
1da177e4 LT |
714 | return i2c_smbus_write_byte_data(client, reg, value); |
715 | } | |
716 | ||
c59cc301 | 717 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 718 | { |
c40769fe JD |
719 | u8 config; |
720 | int i; | |
1da177e4 LT |
721 | |
722 | /* Start monitoring */ | |
c59cc301 | 723 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 724 | if ((config & 0x09) != 0x01) |
c59cc301 | 725 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 726 | (config & 0xf7) | 0x01); |
c40769fe JD |
727 | |
728 | /* A few vars need to be filled upon startup */ | |
729 | for (i = 0; i < 3; i++) { | |
c59cc301 | 730 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
731 | LM78_REG_FAN_MIN(i)); |
732 | } | |
733 | ||
734 | mutex_init(&data->update_lock); | |
1da177e4 LT |
735 | } |
736 | ||
737 | static struct lm78_data *lm78_update_device(struct device *dev) | |
738 | { | |
c40769fe | 739 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
740 | int i; |
741 | ||
9a61bf63 | 742 | mutex_lock(&data->update_lock); |
1da177e4 LT |
743 | |
744 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
745 | || !data->valid) { | |
746 | ||
c40769fe | 747 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
748 | |
749 | for (i = 0; i <= 6; i++) { | |
750 | data->in[i] = | |
c59cc301 | 751 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 752 | data->in_min[i] = |
c59cc301 | 753 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 754 | data->in_max[i] = |
c59cc301 | 755 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
756 | } |
757 | for (i = 0; i < 3; i++) { | |
758 | data->fan[i] = | |
c59cc301 | 759 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 760 | data->fan_min[i] = |
c59cc301 | 761 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 762 | } |
c59cc301 | 763 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 764 | data->temp_over = |
c59cc301 | 765 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 766 | data->temp_hyst = |
c59cc301 JD |
767 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
768 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
769 | data->vid = i & 0x0f; |
770 | if (data->type == lm79) | |
771 | data->vid |= | |
c59cc301 | 772 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
773 | 0x01) << 4; |
774 | else | |
775 | data->vid |= 0x10; | |
776 | data->fan_div[0] = (i >> 4) & 0x03; | |
777 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
778 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
779 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
780 | data->last_updated = jiffies; |
781 | data->valid = 1; | |
782 | ||
783 | data->fan_div[2] = 1; | |
784 | } | |
785 | ||
9a61bf63 | 786 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
787 | |
788 | return data; | |
789 | } | |
790 | ||
90534c5c | 791 | #ifdef CONFIG_ISA |
ed4cebdf JD |
792 | static int __devinit lm78_isa_probe(struct platform_device *pdev) |
793 | { | |
794 | int err; | |
795 | struct lm78_data *data; | |
796 | struct resource *res; | |
797 | ||
798 | /* Reserve the ISA region */ | |
799 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
800 | if (!request_region(res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) { | |
801 | err = -EBUSY; | |
802 | goto exit; | |
803 | } | |
804 | ||
805 | data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL); | |
806 | if (!data) { | |
807 | err = -ENOMEM; | |
808 | goto exit_release_region; | |
809 | } | |
810 | mutex_init(&data->lock); | |
811 | data->isa_addr = res->start; | |
812 | platform_set_drvdata(pdev, data); | |
813 | ||
814 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { | |
815 | data->type = lm79; | |
816 | data->name = "lm79"; | |
817 | } else { | |
818 | data->type = lm78; | |
819 | data->name = "lm78"; | |
820 | } | |
821 | ||
822 | /* Initialize the LM78 chip */ | |
823 | lm78_init_device(data); | |
824 | ||
825 | /* Register sysfs hooks */ | |
826 | if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group)) | |
827 | || (err = device_create_file(&pdev->dev, &dev_attr_name))) | |
828 | goto exit_remove_files; | |
829 | ||
830 | data->hwmon_dev = hwmon_device_register(&pdev->dev); | |
831 | if (IS_ERR(data->hwmon_dev)) { | |
832 | err = PTR_ERR(data->hwmon_dev); | |
833 | goto exit_remove_files; | |
834 | } | |
835 | ||
836 | return 0; | |
837 | ||
838 | exit_remove_files: | |
839 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
840 | device_remove_file(&pdev->dev, &dev_attr_name); | |
841 | kfree(data); | |
842 | exit_release_region: | |
843 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); | |
844 | exit: | |
845 | return err; | |
846 | } | |
847 | ||
848 | static int __devexit lm78_isa_remove(struct platform_device *pdev) | |
849 | { | |
850 | struct lm78_data *data = platform_get_drvdata(pdev); | |
851 | struct resource *res; | |
852 | ||
853 | hwmon_device_unregister(data->hwmon_dev); | |
854 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
855 | device_remove_file(&pdev->dev, &dev_attr_name); | |
856 | kfree(data); | |
857 | ||
858 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
859 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | static struct platform_driver lm78_isa_driver = { | |
865 | .driver = { | |
866 | .owner = THIS_MODULE, | |
867 | .name = "lm78", | |
868 | }, | |
869 | .probe = lm78_isa_probe, | |
870 | .remove = __devexit_p(lm78_isa_remove), | |
871 | }; | |
872 | ||
c40769fe JD |
873 | /* return 1 if a supported chip is found, 0 otherwise */ |
874 | static int __init lm78_isa_found(unsigned short address) | |
875 | { | |
876 | int val, save, found = 0; | |
197027e6 JD |
877 | int port; |
878 | ||
879 | /* Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
880 | * to base+7 and some base+5 to base+6. So we better request each port | |
881 | * individually for the probing phase. */ | |
882 | for (port = address; port < address + LM78_EXTENT; port++) { | |
883 | if (!request_region(port, 1, "lm78")) { | |
ce47da74 | 884 | pr_debug("Failed to request port 0x%x\n", port); |
197027e6 JD |
885 | goto release; |
886 | } | |
47c15532 | 887 | } |
c40769fe JD |
888 | |
889 | #define REALLY_SLOW_IO | |
890 | /* We need the timeouts for at least some LM78-like | |
891 | chips. But only if we read 'undefined' registers. */ | |
892 | val = inb_p(address + 1); | |
893 | if (inb_p(address + 2) != val | |
894 | || inb_p(address + 3) != val | |
895 | || inb_p(address + 7) != val) | |
896 | goto release; | |
897 | #undef REALLY_SLOW_IO | |
898 | ||
899 | /* We should be able to change the 7 LSB of the address port. The | |
900 | MSB (busy flag) should be clear initially, set after the write. */ | |
901 | save = inb_p(address + LM78_ADDR_REG_OFFSET); | |
902 | if (save & 0x80) | |
903 | goto release; | |
904 | val = ~save & 0x7f; | |
905 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
906 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
907 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
908 | goto release; | |
909 | } | |
910 | ||
911 | /* We found a device, now see if it could be an LM78 */ | |
912 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
913 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
914 | if (val & 0x80) | |
915 | goto release; | |
916 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
917 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
918 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
919 | goto release; | |
920 | ||
921 | /* The busy flag should be clear again */ | |
922 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
923 | goto release; | |
924 | ||
925 | /* Explicitly prevent the misdetection of Winbond chips */ | |
926 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
927 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
928 | if (val == 0xa3 || val == 0x5c) | |
929 | goto release; | |
930 | ||
931 | /* Explicitly prevent the misdetection of ITE chips */ | |
932 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
933 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
934 | if (val == 0x90) | |
935 | goto release; | |
936 | ||
937 | /* Determine the chip type */ | |
938 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
939 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 940 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
941 | || val == 0x40 /* LM78-J */ |
942 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
943 | found = 1; | |
944 | ||
945 | if (found) | |
ce47da74 | 946 | pr_info("Found an %s chip at %#x\n", |
c40769fe JD |
947 | val & 0x80 ? "LM79" : "LM78", (int)address); |
948 | ||
949 | release: | |
197027e6 JD |
950 | for (port--; port >= address; port--) |
951 | release_region(port, 1); | |
c40769fe JD |
952 | return found; |
953 | } | |
954 | ||
955 | static int __init lm78_isa_device_add(unsigned short address) | |
956 | { | |
957 | struct resource res = { | |
958 | .start = address, | |
15bde2f1 | 959 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
960 | .name = "lm78", |
961 | .flags = IORESOURCE_IO, | |
962 | }; | |
963 | int err; | |
964 | ||
965 | pdev = platform_device_alloc("lm78", address); | |
966 | if (!pdev) { | |
967 | err = -ENOMEM; | |
ce47da74 | 968 | pr_err("Device allocation failed\n"); |
c40769fe JD |
969 | goto exit; |
970 | } | |
971 | ||
972 | err = platform_device_add_resources(pdev, &res, 1); | |
973 | if (err) { | |
ce47da74 | 974 | pr_err("Device resource addition failed (%d)\n", err); |
c40769fe JD |
975 | goto exit_device_put; |
976 | } | |
977 | ||
978 | err = platform_device_add(pdev); | |
979 | if (err) { | |
ce47da74 | 980 | pr_err("Device addition failed (%d)\n", err); |
c40769fe JD |
981 | goto exit_device_put; |
982 | } | |
983 | ||
984 | return 0; | |
985 | ||
986 | exit_device_put: | |
987 | platform_device_put(pdev); | |
988 | exit: | |
989 | pdev = NULL; | |
990 | return err; | |
991 | } | |
992 | ||
90534c5c | 993 | static int __init lm78_isa_register(void) |
1da177e4 | 994 | { |
fde09509 JD |
995 | int res; |
996 | ||
c40769fe JD |
997 | if (lm78_isa_found(isa_address)) { |
998 | res = platform_driver_register(&lm78_isa_driver); | |
999 | if (res) | |
18c73f90 | 1000 | goto exit; |
fde09509 | 1001 | |
c40769fe JD |
1002 | /* Sets global pdev as a side effect */ |
1003 | res = lm78_isa_device_add(isa_address); | |
1004 | if (res) | |
1005 | goto exit_unreg_isa_driver; | |
1006 | } | |
fde09509 JD |
1007 | |
1008 | return 0; | |
c40769fe JD |
1009 | |
1010 | exit_unreg_isa_driver: | |
1011 | platform_driver_unregister(&lm78_isa_driver); | |
c40769fe JD |
1012 | exit: |
1013 | return res; | |
1da177e4 LT |
1014 | } |
1015 | ||
90534c5c | 1016 | static void lm78_isa_unregister(void) |
1da177e4 | 1017 | { |
c40769fe JD |
1018 | if (pdev) { |
1019 | platform_device_unregister(pdev); | |
1020 | platform_driver_unregister(&lm78_isa_driver); | |
1021 | } | |
90534c5c JD |
1022 | } |
1023 | #else /* !CONFIG_ISA */ | |
1024 | ||
1025 | static int __init lm78_isa_register(void) | |
1026 | { | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static void lm78_isa_unregister(void) | |
1031 | { | |
1032 | } | |
1033 | #endif /* CONFIG_ISA */ | |
1034 | ||
1035 | static int __init sm_lm78_init(void) | |
1036 | { | |
1037 | int res; | |
1038 | ||
1039 | /* We register the ISA device first, so that we can skip the | |
1040 | * registration of an I2C interface to the same device. */ | |
1041 | res = lm78_isa_register(); | |
1042 | if (res) | |
1043 | goto exit; | |
1044 | ||
1045 | res = i2c_add_driver(&lm78_driver); | |
1046 | if (res) | |
1047 | goto exit_unreg_isa_device; | |
1048 | ||
1049 | return 0; | |
1050 | ||
1051 | exit_unreg_isa_device: | |
1052 | lm78_isa_unregister(); | |
1053 | exit: | |
1054 | return res; | |
1055 | } | |
1056 | ||
1057 | static void __exit sm_lm78_exit(void) | |
1058 | { | |
1059 | lm78_isa_unregister(); | |
1da177e4 LT |
1060 | i2c_del_driver(&lm78_driver); |
1061 | } | |
1062 | ||
156e2d1a | 1063 | MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <khali@linux-fr.org>"); |
27fe048e | 1064 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
1065 | MODULE_LICENSE("GPL"); |
1066 | ||
1067 | module_init(sm_lm78_init); | |
1068 | module_exit(sm_lm78_exit); |