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> | |
c40769fe | 5 | Copyright (c) 2007 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> | |
c40769fe JD |
29 | #include <linux/platform_device.h> |
30 | #include <linux/ioport.h> | |
943b0830 | 31 | #include <linux/hwmon.h> |
19f673ed | 32 | #include <linux/hwmon-vid.h> |
247dde4c | 33 | #include <linux/hwmon-sysfs.h> |
943b0830 | 34 | #include <linux/err.h> |
9a61bf63 | 35 | #include <linux/mutex.h> |
6055fae8 | 36 | #include <linux/io.h> |
1da177e4 | 37 | |
c40769fe JD |
38 | /* ISA device, if found */ |
39 | static struct platform_device *pdev; | |
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 }; | |
2d8672c5 | 44 | static unsigned short isa_address = 0x290; |
1da177e4 | 45 | |
e5e9f44c | 46 | enum chips { lm78, lm79 }; |
1da177e4 LT |
47 | |
48 | /* Many LM78 constants specified below */ | |
49 | ||
50 | /* Length of ISA address segment */ | |
51 | #define LM78_EXTENT 8 | |
52 | ||
53 | /* Where are the ISA address/data registers relative to the base address */ | |
54 | #define LM78_ADDR_REG_OFFSET 5 | |
55 | #define LM78_DATA_REG_OFFSET 6 | |
56 | ||
57 | /* The LM78 registers */ | |
58 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
59 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
60 | #define LM78_REG_IN(nr) (0x20 + (nr)) | |
61 | ||
62 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) | |
63 | #define LM78_REG_FAN(nr) (0x28 + (nr)) | |
64 | ||
65 | #define LM78_REG_TEMP 0x27 | |
66 | #define LM78_REG_TEMP_OVER 0x39 | |
67 | #define LM78_REG_TEMP_HYST 0x3a | |
68 | ||
69 | #define LM78_REG_ALARM1 0x41 | |
70 | #define LM78_REG_ALARM2 0x42 | |
71 | ||
72 | #define LM78_REG_VID_FANDIV 0x47 | |
73 | ||
74 | #define LM78_REG_CONFIG 0x40 | |
75 | #define LM78_REG_CHIPID 0x49 | |
76 | #define LM78_REG_I2C_ADDR 0x48 | |
77 | ||
78 | ||
79 | /* Conversions. Rounding and limit checking is only done on the TO_REG | |
80 | variants. */ | |
81 | ||
82 | /* IN: mV, (0V to 4.08V) | |
83 | REG: 16mV/bit */ | |
84 | static inline u8 IN_TO_REG(unsigned long val) | |
85 | { | |
86 | unsigned long nval = SENSORS_LIMIT(val, 0, 4080); | |
87 | return (nval + 8) / 16; | |
88 | } | |
89 | #define IN_FROM_REG(val) ((val) * 16) | |
90 | ||
91 | static inline u8 FAN_TO_REG(long rpm, int div) | |
92 | { | |
93 | if (rpm <= 0) | |
94 | return 255; | |
95 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
96 | } | |
97 | ||
98 | static inline int FAN_FROM_REG(u8 val, int div) | |
99 | { | |
100 | return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); | |
101 | } | |
102 | ||
103 | /* TEMP: mC (-128C to +127C) | |
104 | REG: 1C/bit, two's complement */ | |
105 | static inline s8 TEMP_TO_REG(int val) | |
106 | { | |
107 | int nval = SENSORS_LIMIT(val, -128000, 127000) ; | |
108 | return nval<0 ? (nval-500)/1000 : (nval+500)/1000; | |
109 | } | |
110 | ||
111 | static inline int TEMP_FROM_REG(s8 val) | |
112 | { | |
113 | return val * 1000; | |
114 | } | |
115 | ||
1da177e4 LT |
116 | #define DIV_FROM_REG(val) (1 << (val)) |
117 | ||
1da177e4 | 118 | struct lm78_data { |
0c6e9731 | 119 | struct i2c_client *client; |
1beeffe4 | 120 | struct device *hwmon_dev; |
9a61bf63 | 121 | struct mutex lock; |
1da177e4 LT |
122 | enum chips type; |
123 | ||
6e1b5029 JD |
124 | /* For ISA device only */ |
125 | const char *name; | |
126 | int isa_addr; | |
127 | ||
9a61bf63 | 128 | struct mutex update_lock; |
1da177e4 LT |
129 | char valid; /* !=0 if following fields are valid */ |
130 | unsigned long last_updated; /* In jiffies */ | |
131 | ||
132 | u8 in[7]; /* Register value */ | |
133 | u8 in_max[7]; /* Register value */ | |
134 | u8 in_min[7]; /* Register value */ | |
135 | u8 fan[3]; /* Register value */ | |
136 | u8 fan_min[3]; /* Register value */ | |
137 | s8 temp; /* Register value */ | |
138 | s8 temp_over; /* Register value */ | |
139 | s8 temp_hyst; /* Register value */ | |
140 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
141 | u8 vid; /* Register encoding, combined */ | |
142 | u16 alarms; /* Register encoding, combined */ | |
143 | }; | |
144 | ||
145 | ||
310ec792 | 146 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 JD |
147 | struct i2c_board_info *info); |
148 | static int lm78_i2c_probe(struct i2c_client *client, | |
149 | const struct i2c_device_id *id); | |
150 | static int lm78_i2c_remove(struct i2c_client *client); | |
1da177e4 | 151 | |
c40769fe JD |
152 | static int __devinit lm78_isa_probe(struct platform_device *pdev); |
153 | static int __devexit lm78_isa_remove(struct platform_device *pdev); | |
154 | ||
c59cc301 JD |
155 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
156 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 157 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 158 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 LT |
159 | |
160 | ||
0c6e9731 JD |
161 | static const struct i2c_device_id lm78_i2c_id[] = { |
162 | { "lm78", lm78 }, | |
163 | { "lm79", lm79 }, | |
164 | { } | |
165 | }; | |
166 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
167 | ||
1da177e4 | 168 | static struct i2c_driver lm78_driver = { |
0c6e9731 | 169 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 170 | .driver = { |
cdaf7934 LR |
171 | .name = "lm78", |
172 | }, | |
0c6e9731 JD |
173 | .probe = lm78_i2c_probe, |
174 | .remove = lm78_i2c_remove, | |
175 | .id_table = lm78_i2c_id, | |
176 | .detect = lm78_i2c_detect, | |
c3813d6a | 177 | .address_list = normal_i2c, |
1da177e4 LT |
178 | }; |
179 | ||
c40769fe | 180 | static struct platform_driver lm78_isa_driver = { |
cdaf7934 | 181 | .driver = { |
87218842 | 182 | .owner = THIS_MODULE, |
c40769fe | 183 | .name = "lm78", |
cdaf7934 | 184 | }, |
c40769fe | 185 | .probe = lm78_isa_probe, |
39d8bbed | 186 | .remove = __devexit_p(lm78_isa_remove), |
fde09509 JD |
187 | }; |
188 | ||
189 | ||
1da177e4 | 190 | /* 7 Voltages */ |
247dde4c JD |
191 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
192 | char *buf) | |
1da177e4 | 193 | { |
247dde4c | 194 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 195 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 196 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
1da177e4 LT |
197 | } |
198 | ||
247dde4c JD |
199 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
200 | char *buf) | |
1da177e4 | 201 | { |
247dde4c | 202 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 203 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 204 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index])); |
1da177e4 LT |
205 | } |
206 | ||
247dde4c JD |
207 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
208 | char *buf) | |
1da177e4 | 209 | { |
247dde4c | 210 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 211 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 212 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index])); |
1da177e4 LT |
213 | } |
214 | ||
247dde4c JD |
215 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
216 | const char *buf, size_t count) | |
1da177e4 | 217 | { |
247dde4c | 218 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 219 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 | 220 | unsigned long val = simple_strtoul(buf, NULL, 10); |
247dde4c | 221 | int nr = attr->index; |
1da177e4 | 222 | |
9a61bf63 | 223 | mutex_lock(&data->update_lock); |
1da177e4 | 224 | data->in_min[nr] = IN_TO_REG(val); |
c59cc301 | 225 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
9a61bf63 | 226 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
227 | return count; |
228 | } | |
229 | ||
247dde4c JD |
230 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
231 | const char *buf, size_t count) | |
1da177e4 | 232 | { |
247dde4c | 233 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 234 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 | 235 | unsigned long val = simple_strtoul(buf, NULL, 10); |
247dde4c | 236 | int nr = attr->index; |
1da177e4 | 237 | |
9a61bf63 | 238 | mutex_lock(&data->update_lock); |
1da177e4 | 239 | data->in_max[nr] = IN_TO_REG(val); |
c59cc301 | 240 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
9a61bf63 | 241 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
242 | return count; |
243 | } | |
244 | ||
245 | #define show_in_offset(offset) \ | |
247dde4c JD |
246 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
247 | show_in, NULL, offset); \ | |
248 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
249 | show_in_min, set_in_min, offset); \ | |
250 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
251 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
252 | |
253 | show_in_offset(0); | |
254 | show_in_offset(1); | |
255 | show_in_offset(2); | |
256 | show_in_offset(3); | |
257 | show_in_offset(4); | |
258 | show_in_offset(5); | |
259 | show_in_offset(6); | |
260 | ||
261 | /* Temperature */ | |
247dde4c JD |
262 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
263 | char *buf) | |
1da177e4 LT |
264 | { |
265 | struct lm78_data *data = lm78_update_device(dev); | |
266 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
267 | } | |
268 | ||
247dde4c JD |
269 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
270 | char *buf) | |
1da177e4 LT |
271 | { |
272 | struct lm78_data *data = lm78_update_device(dev); | |
273 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
274 | } | |
275 | ||
247dde4c JD |
276 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
277 | const char *buf, size_t count) | |
1da177e4 | 278 | { |
c40769fe | 279 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
280 | long val = simple_strtol(buf, NULL, 10); |
281 | ||
9a61bf63 | 282 | mutex_lock(&data->update_lock); |
1da177e4 | 283 | data->temp_over = TEMP_TO_REG(val); |
c59cc301 | 284 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
9a61bf63 | 285 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
286 | return count; |
287 | } | |
288 | ||
247dde4c JD |
289 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
290 | char *buf) | |
1da177e4 LT |
291 | { |
292 | struct lm78_data *data = lm78_update_device(dev); | |
293 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
294 | } | |
295 | ||
247dde4c JD |
296 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
297 | const char *buf, size_t count) | |
1da177e4 | 298 | { |
c40769fe | 299 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
300 | long val = simple_strtol(buf, NULL, 10); |
301 | ||
9a61bf63 | 302 | mutex_lock(&data->update_lock); |
1da177e4 | 303 | data->temp_hyst = TEMP_TO_REG(val); |
c59cc301 | 304 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
9a61bf63 | 305 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
306 | return count; |
307 | } | |
308 | ||
309 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
310 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, | |
311 | show_temp_over, set_temp_over); | |
312 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
313 | show_temp_hyst, set_temp_hyst); | |
314 | ||
315 | /* 3 Fans */ | |
247dde4c JD |
316 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
317 | char *buf) | |
1da177e4 | 318 | { |
247dde4c | 319 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 320 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 321 | int nr = attr->index; |
1da177e4 LT |
322 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
323 | DIV_FROM_REG(data->fan_div[nr])) ); | |
324 | } | |
325 | ||
247dde4c JD |
326 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
327 | char *buf) | |
1da177e4 | 328 | { |
247dde4c | 329 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 330 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 331 | int nr = attr->index; |
1da177e4 LT |
332 | return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr], |
333 | DIV_FROM_REG(data->fan_div[nr])) ); | |
334 | } | |
335 | ||
247dde4c JD |
336 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
337 | const char *buf, size_t count) | |
1da177e4 | 338 | { |
247dde4c | 339 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 340 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 341 | int nr = attr->index; |
1da177e4 LT |
342 | unsigned long val = simple_strtoul(buf, NULL, 10); |
343 | ||
9a61bf63 | 344 | mutex_lock(&data->update_lock); |
1da177e4 | 345 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
c59cc301 | 346 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 347 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
348 | return count; |
349 | } | |
350 | ||
247dde4c JD |
351 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
352 | char *buf) | |
1da177e4 | 353 | { |
247dde4c | 354 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 355 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 356 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
357 | } |
358 | ||
359 | /* Note: we save and restore the fan minimum here, because its value is | |
360 | determined in part by the fan divisor. This follows the principle of | |
d6e05edc | 361 | least surprise; the user doesn't expect the fan minimum to change just |
1da177e4 | 362 | because the divisor changed. */ |
247dde4c JD |
363 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
364 | const char *buf, size_t count) | |
1da177e4 | 365 | { |
247dde4c | 366 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 367 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 368 | int nr = attr->index; |
1da177e4 LT |
369 | unsigned long val = simple_strtoul(buf, NULL, 10); |
370 | unsigned long min; | |
371 | u8 reg; | |
372 | ||
9a61bf63 | 373 | mutex_lock(&data->update_lock); |
1da177e4 LT |
374 | min = FAN_FROM_REG(data->fan_min[nr], |
375 | DIV_FROM_REG(data->fan_div[nr])); | |
376 | ||
377 | switch (val) { | |
378 | case 1: data->fan_div[nr] = 0; break; | |
379 | case 2: data->fan_div[nr] = 1; break; | |
380 | case 4: data->fan_div[nr] = 2; break; | |
381 | case 8: data->fan_div[nr] = 3; break; | |
382 | default: | |
c40769fe | 383 | dev_err(dev, "fan_div value %ld not " |
1da177e4 | 384 | "supported. Choose one of 1, 2, 4 or 8!\n", val); |
9a61bf63 | 385 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
386 | return -EINVAL; |
387 | } | |
388 | ||
c59cc301 | 389 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
1da177e4 LT |
390 | switch (nr) { |
391 | case 0: | |
392 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
393 | break; | |
394 | case 1: | |
395 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
396 | break; | |
397 | } | |
c59cc301 | 398 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
1da177e4 LT |
399 | |
400 | data->fan_min[nr] = | |
401 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
c59cc301 | 402 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 403 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
404 | |
405 | return count; | |
406 | } | |
407 | ||
247dde4c JD |
408 | #define show_fan_offset(offset) \ |
409 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
410 | show_fan, NULL, offset - 1); \ | |
411 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
412 | show_fan_min, set_fan_min, offset - 1); | |
1da177e4 LT |
413 | |
414 | show_fan_offset(1); | |
415 | show_fan_offset(2); | |
416 | show_fan_offset(3); | |
417 | ||
418 | /* Fan 3 divisor is locked in H/W */ | |
247dde4c JD |
419 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
420 | show_fan_div, set_fan_div, 0); | |
421 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
422 | show_fan_div, set_fan_div, 1); | |
423 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); | |
1da177e4 LT |
424 | |
425 | /* VID */ | |
247dde4c JD |
426 | static ssize_t show_vid(struct device *dev, struct device_attribute *da, |
427 | char *buf) | |
1da177e4 LT |
428 | { |
429 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 430 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 LT |
431 | } |
432 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
433 | ||
434 | /* Alarms */ | |
247dde4c JD |
435 | static ssize_t show_alarms(struct device *dev, struct device_attribute *da, |
436 | char *buf) | |
1da177e4 LT |
437 | { |
438 | struct lm78_data *data = lm78_update_device(dev); | |
439 | return sprintf(buf, "%u\n", data->alarms); | |
440 | } | |
441 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
442 | ||
428a7039 JD |
443 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
444 | char *buf) | |
445 | { | |
446 | struct lm78_data *data = lm78_update_device(dev); | |
447 | int nr = to_sensor_dev_attr(da)->index; | |
448 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
449 | } | |
450 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
451 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
452 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
453 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
454 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
455 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
456 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); | |
457 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
458 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
459 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
460 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
461 | ||
c1685f61 | 462 | static struct attribute *lm78_attributes[] = { |
247dde4c JD |
463 | &sensor_dev_attr_in0_input.dev_attr.attr, |
464 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
465 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 466 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
467 | &sensor_dev_attr_in1_input.dev_attr.attr, |
468 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
469 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 470 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
471 | &sensor_dev_attr_in2_input.dev_attr.attr, |
472 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
473 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 474 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
475 | &sensor_dev_attr_in3_input.dev_attr.attr, |
476 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
477 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 478 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
479 | &sensor_dev_attr_in4_input.dev_attr.attr, |
480 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
481 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 482 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
483 | &sensor_dev_attr_in5_input.dev_attr.attr, |
484 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
485 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 486 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
487 | &sensor_dev_attr_in6_input.dev_attr.attr, |
488 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
489 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 490 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
491 | &dev_attr_temp1_input.attr, |
492 | &dev_attr_temp1_max.attr, | |
493 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 494 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
495 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
496 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
497 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 498 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
499 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
500 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
501 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 502 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
503 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
504 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
505 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 506 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
507 | &dev_attr_alarms.attr, |
508 | &dev_attr_cpu0_vid.attr, | |
509 | ||
510 | NULL | |
511 | }; | |
512 | ||
513 | static const struct attribute_group lm78_group = { | |
514 | .attrs = lm78_attributes, | |
515 | }; | |
516 | ||
c40769fe JD |
517 | /* I2C devices get this name attribute automatically, but for ISA devices |
518 | we must create it by ourselves. */ | |
519 | static ssize_t show_name(struct device *dev, struct device_attribute | |
520 | *devattr, char *buf) | |
521 | { | |
522 | struct lm78_data *data = dev_get_drvdata(dev); | |
523 | ||
6e1b5029 | 524 | return sprintf(buf, "%s\n", data->name); |
c40769fe JD |
525 | } |
526 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
527 | ||
18c73f90 JD |
528 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
529 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
530 | { | |
0c6e9731 | 531 | struct lm78_data *isa; |
18c73f90 JD |
532 | int i; |
533 | ||
534 | if (!pdev) /* No ISA chip */ | |
535 | return 0; | |
18c73f90 JD |
536 | isa = platform_get_drvdata(pdev); |
537 | ||
538 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
539 | return 0; /* Address doesn't match */ | |
540 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
541 | return 0; /* Chip type doesn't match */ | |
542 | ||
543 | /* We compare all the limit registers, the config register and the | |
544 | * interrupt mask registers */ | |
545 | for (i = 0x2b; i <= 0x3d; i++) { | |
0c6e9731 JD |
546 | if (lm78_read_value(isa, i) != |
547 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
548 | return 0; |
549 | } | |
550 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 551 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
552 | return 0; |
553 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
554 | if (lm78_read_value(isa, i) != |
555 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
556 | return 0; |
557 | } | |
558 | ||
559 | return 1; | |
560 | } | |
561 | ||
310ec792 | 562 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 563 | struct i2c_board_info *info) |
1da177e4 | 564 | { |
0c6e9731 JD |
565 | int i; |
566 | struct lm78_data *isa = pdev ? platform_get_drvdata(pdev) : NULL; | |
567 | const char *client_name; | |
568 | struct i2c_adapter *adapter = client->adapter; | |
569 | int address = client->addr; | |
1da177e4 | 570 | |
0c6e9731 JD |
571 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
572 | return -ENODEV; | |
1da177e4 | 573 | |
0c6e9731 JD |
574 | /* We block updates of the ISA device to minimize the risk of |
575 | concurrent access to the same LM78 chip through different | |
576 | interfaces. */ | |
577 | if (isa) | |
578 | mutex_lock(&isa->update_lock); | |
1da177e4 | 579 | |
52df6440 JD |
580 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
581 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
582 | goto err_nodev; | |
583 | ||
584 | /* Explicitly prevent the misdetection of Winbond chips */ | |
585 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
586 | if (i == 0xa3 || i == 0x5c) | |
587 | goto err_nodev; | |
1da177e4 LT |
588 | |
589 | /* Determine the chip type. */ | |
52df6440 JD |
590 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
591 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
592 | || i == 0x40) /* LM78-J */ | |
593 | client_name = "lm78"; | |
594 | else if ((i & 0xfe) == 0xc0) | |
595 | client_name = "lm79"; | |
596 | else | |
597 | goto err_nodev; | |
598 | ||
599 | if (lm78_alias_detect(client, i)) { | |
600 | dev_dbg(&adapter->dev, "Device at 0x%02x appears to " | |
601 | "be the same as ISA device\n", address); | |
602 | goto err_nodev; | |
1da177e4 LT |
603 | } |
604 | ||
0c6e9731 JD |
605 | if (isa) |
606 | mutex_unlock(&isa->update_lock); | |
607 | ||
0c6e9731 | 608 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 609 | |
0c6e9731 | 610 | return 0; |
1da177e4 | 611 | |
0c6e9731 JD |
612 | err_nodev: |
613 | if (isa) | |
614 | mutex_unlock(&isa->update_lock); | |
615 | return -ENODEV; | |
616 | } | |
617 | ||
618 | static int lm78_i2c_probe(struct i2c_client *client, | |
619 | const struct i2c_device_id *id) | |
620 | { | |
621 | struct lm78_data *data; | |
622 | int err; | |
623 | ||
624 | data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL); | |
625 | if (!data) | |
626 | return -ENOMEM; | |
627 | ||
628 | i2c_set_clientdata(client, data); | |
629 | data->client = client; | |
630 | data->type = id->driver_data; | |
1da177e4 LT |
631 | |
632 | /* Initialize the LM78 chip */ | |
c59cc301 | 633 | lm78_init_device(data); |
1da177e4 | 634 | |
1da177e4 | 635 | /* Register sysfs hooks */ |
0c6e9731 JD |
636 | err = sysfs_create_group(&client->dev.kobj, &lm78_group); |
637 | if (err) | |
c1685f61 MH |
638 | goto ERROR3; |
639 | ||
0c6e9731 | 640 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
641 | if (IS_ERR(data->hwmon_dev)) { |
642 | err = PTR_ERR(data->hwmon_dev); | |
c1685f61 | 643 | goto ERROR4; |
943b0830 MH |
644 | } |
645 | ||
1da177e4 LT |
646 | return 0; |
647 | ||
c1685f61 | 648 | ERROR4: |
0c6e9731 | 649 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
943b0830 | 650 | ERROR3: |
1da177e4 | 651 | kfree(data); |
1da177e4 LT |
652 | return err; |
653 | } | |
654 | ||
0c6e9731 | 655 | static int lm78_i2c_remove(struct i2c_client *client) |
1da177e4 | 656 | { |
943b0830 | 657 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 | 658 | |
1beeffe4 | 659 | hwmon_device_unregister(data->hwmon_dev); |
c1685f61 | 660 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
c40769fe JD |
661 | kfree(data); |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | static int __devinit lm78_isa_probe(struct platform_device *pdev) | |
667 | { | |
668 | int err; | |
669 | struct lm78_data *data; | |
670 | struct resource *res; | |
c40769fe JD |
671 | |
672 | /* Reserve the ISA region */ | |
673 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
47c15532 | 674 | if (!request_region(res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) { |
c40769fe JD |
675 | err = -EBUSY; |
676 | goto exit; | |
677 | } | |
678 | ||
679 | if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) { | |
680 | err = -ENOMEM; | |
681 | goto exit_release_region; | |
682 | } | |
683 | mutex_init(&data->lock); | |
6e1b5029 | 684 | data->isa_addr = res->start; |
c40769fe JD |
685 | platform_set_drvdata(pdev, data); |
686 | ||
c59cc301 | 687 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { |
c40769fe | 688 | data->type = lm79; |
6e1b5029 | 689 | data->name = "lm79"; |
c40769fe JD |
690 | } else { |
691 | data->type = lm78; | |
6e1b5029 | 692 | data->name = "lm78"; |
c40769fe | 693 | } |
c40769fe JD |
694 | |
695 | /* Initialize the LM78 chip */ | |
c59cc301 | 696 | lm78_init_device(data); |
c40769fe JD |
697 | |
698 | /* Register sysfs hooks */ | |
699 | if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group)) | |
700 | || (err = device_create_file(&pdev->dev, &dev_attr_name))) | |
701 | goto exit_remove_files; | |
702 | ||
1beeffe4 TJ |
703 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
704 | if (IS_ERR(data->hwmon_dev)) { | |
705 | err = PTR_ERR(data->hwmon_dev); | |
c40769fe JD |
706 | goto exit_remove_files; |
707 | } | |
708 | ||
709 | return 0; | |
710 | ||
711 | exit_remove_files: | |
712 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
713 | device_remove_file(&pdev->dev, &dev_attr_name); | |
714 | kfree(data); | |
715 | exit_release_region: | |
47c15532 | 716 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); |
c40769fe JD |
717 | exit: |
718 | return err; | |
719 | } | |
720 | ||
721 | static int __devexit lm78_isa_remove(struct platform_device *pdev) | |
722 | { | |
723 | struct lm78_data *data = platform_get_drvdata(pdev); | |
6e1b5029 | 724 | struct resource *res; |
1da177e4 | 725 | |
1beeffe4 | 726 | hwmon_device_unregister(data->hwmon_dev); |
c40769fe JD |
727 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); |
728 | device_remove_file(&pdev->dev, &dev_attr_name); | |
943b0830 | 729 | kfree(data); |
1da177e4 | 730 | |
6e1b5029 JD |
731 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
732 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); | |
733 | ||
1da177e4 LT |
734 | return 0; |
735 | } | |
736 | ||
44bbe87e | 737 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
1da177e4 LT |
738 | We don't want to lock the whole ISA bus, so we lock each client |
739 | separately. | |
740 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
741 | would slow down the LM78 access and should not be necessary. */ | |
c59cc301 | 742 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 743 | { |
0c6e9731 | 744 | struct i2c_client *client = data->client; |
c59cc301 | 745 | |
0c6e9731 | 746 | if (!client) { /* ISA device */ |
c59cc301 | 747 | int res; |
9a61bf63 | 748 | mutex_lock(&data->lock); |
6e1b5029 JD |
749 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
750 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 751 | mutex_unlock(&data->lock); |
1da177e4 LT |
752 | return res; |
753 | } else | |
754 | return i2c_smbus_read_byte_data(client, reg); | |
755 | } | |
756 | ||
44bbe87e | 757 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
1da177e4 LT |
758 | We don't want to lock the whole ISA bus, so we lock each client |
759 | separately. | |
760 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
761 | would slow down the LM78 access and should not be necessary. | |
762 | There are some ugly typecasts here, but the good new is - they should | |
763 | nowhere else be necessary! */ | |
c59cc301 | 764 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 765 | { |
0c6e9731 | 766 | struct i2c_client *client = data->client; |
c59cc301 | 767 | |
0c6e9731 | 768 | if (!client) { /* ISA device */ |
9a61bf63 | 769 | mutex_lock(&data->lock); |
6e1b5029 JD |
770 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
771 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 772 | mutex_unlock(&data->lock); |
1da177e4 LT |
773 | return 0; |
774 | } else | |
775 | return i2c_smbus_write_byte_data(client, reg, value); | |
776 | } | |
777 | ||
c59cc301 | 778 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 779 | { |
c40769fe JD |
780 | u8 config; |
781 | int i; | |
1da177e4 LT |
782 | |
783 | /* Start monitoring */ | |
c59cc301 | 784 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 785 | if ((config & 0x09) != 0x01) |
c59cc301 | 786 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 787 | (config & 0xf7) | 0x01); |
c40769fe JD |
788 | |
789 | /* A few vars need to be filled upon startup */ | |
790 | for (i = 0; i < 3; i++) { | |
c59cc301 | 791 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
792 | LM78_REG_FAN_MIN(i)); |
793 | } | |
794 | ||
795 | mutex_init(&data->update_lock); | |
1da177e4 LT |
796 | } |
797 | ||
798 | static struct lm78_data *lm78_update_device(struct device *dev) | |
799 | { | |
c40769fe | 800 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
801 | int i; |
802 | ||
9a61bf63 | 803 | mutex_lock(&data->update_lock); |
1da177e4 LT |
804 | |
805 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
806 | || !data->valid) { | |
807 | ||
c40769fe | 808 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
809 | |
810 | for (i = 0; i <= 6; i++) { | |
811 | data->in[i] = | |
c59cc301 | 812 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 813 | data->in_min[i] = |
c59cc301 | 814 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 815 | data->in_max[i] = |
c59cc301 | 816 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
817 | } |
818 | for (i = 0; i < 3; i++) { | |
819 | data->fan[i] = | |
c59cc301 | 820 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 821 | data->fan_min[i] = |
c59cc301 | 822 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 823 | } |
c59cc301 | 824 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 825 | data->temp_over = |
c59cc301 | 826 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 827 | data->temp_hyst = |
c59cc301 JD |
828 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
829 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
830 | data->vid = i & 0x0f; |
831 | if (data->type == lm79) | |
832 | data->vid |= | |
c59cc301 | 833 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
834 | 0x01) << 4; |
835 | else | |
836 | data->vid |= 0x10; | |
837 | data->fan_div[0] = (i >> 4) & 0x03; | |
838 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
839 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
840 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
841 | data->last_updated = jiffies; |
842 | data->valid = 1; | |
843 | ||
844 | data->fan_div[2] = 1; | |
845 | } | |
846 | ||
9a61bf63 | 847 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
848 | |
849 | return data; | |
850 | } | |
851 | ||
c40769fe JD |
852 | /* return 1 if a supported chip is found, 0 otherwise */ |
853 | static int __init lm78_isa_found(unsigned short address) | |
854 | { | |
855 | int val, save, found = 0; | |
197027e6 JD |
856 | int port; |
857 | ||
858 | /* Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
859 | * to base+7 and some base+5 to base+6. So we better request each port | |
860 | * individually for the probing phase. */ | |
861 | for (port = address; port < address + LM78_EXTENT; port++) { | |
862 | if (!request_region(port, 1, "lm78")) { | |
ce47da74 | 863 | pr_debug("Failed to request port 0x%x\n", port); |
197027e6 JD |
864 | goto release; |
865 | } | |
47c15532 | 866 | } |
c40769fe JD |
867 | |
868 | #define REALLY_SLOW_IO | |
869 | /* We need the timeouts for at least some LM78-like | |
870 | chips. But only if we read 'undefined' registers. */ | |
871 | val = inb_p(address + 1); | |
872 | if (inb_p(address + 2) != val | |
873 | || inb_p(address + 3) != val | |
874 | || inb_p(address + 7) != val) | |
875 | goto release; | |
876 | #undef REALLY_SLOW_IO | |
877 | ||
878 | /* We should be able to change the 7 LSB of the address port. The | |
879 | MSB (busy flag) should be clear initially, set after the write. */ | |
880 | save = inb_p(address + LM78_ADDR_REG_OFFSET); | |
881 | if (save & 0x80) | |
882 | goto release; | |
883 | val = ~save & 0x7f; | |
884 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
885 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
886 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
887 | goto release; | |
888 | } | |
889 | ||
890 | /* We found a device, now see if it could be an LM78 */ | |
891 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
892 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
893 | if (val & 0x80) | |
894 | goto release; | |
895 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
896 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
897 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
898 | goto release; | |
899 | ||
900 | /* The busy flag should be clear again */ | |
901 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
902 | goto release; | |
903 | ||
904 | /* Explicitly prevent the misdetection of Winbond chips */ | |
905 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
906 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
907 | if (val == 0xa3 || val == 0x5c) | |
908 | goto release; | |
909 | ||
910 | /* Explicitly prevent the misdetection of ITE chips */ | |
911 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
912 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
913 | if (val == 0x90) | |
914 | goto release; | |
915 | ||
916 | /* Determine the chip type */ | |
917 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
918 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 919 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
920 | || val == 0x40 /* LM78-J */ |
921 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
922 | found = 1; | |
923 | ||
924 | if (found) | |
ce47da74 | 925 | pr_info("Found an %s chip at %#x\n", |
c40769fe JD |
926 | val & 0x80 ? "LM79" : "LM78", (int)address); |
927 | ||
928 | release: | |
197027e6 JD |
929 | for (port--; port >= address; port--) |
930 | release_region(port, 1); | |
c40769fe JD |
931 | return found; |
932 | } | |
933 | ||
934 | static int __init lm78_isa_device_add(unsigned short address) | |
935 | { | |
936 | struct resource res = { | |
937 | .start = address, | |
15bde2f1 | 938 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
939 | .name = "lm78", |
940 | .flags = IORESOURCE_IO, | |
941 | }; | |
942 | int err; | |
943 | ||
944 | pdev = platform_device_alloc("lm78", address); | |
945 | if (!pdev) { | |
946 | err = -ENOMEM; | |
ce47da74 | 947 | pr_err("Device allocation failed\n"); |
c40769fe JD |
948 | goto exit; |
949 | } | |
950 | ||
951 | err = platform_device_add_resources(pdev, &res, 1); | |
952 | if (err) { | |
ce47da74 | 953 | pr_err("Device resource addition failed (%d)\n", err); |
c40769fe JD |
954 | goto exit_device_put; |
955 | } | |
956 | ||
957 | err = platform_device_add(pdev); | |
958 | if (err) { | |
ce47da74 | 959 | pr_err("Device addition failed (%d)\n", err); |
c40769fe JD |
960 | goto exit_device_put; |
961 | } | |
962 | ||
963 | return 0; | |
964 | ||
965 | exit_device_put: | |
966 | platform_device_put(pdev); | |
967 | exit: | |
968 | pdev = NULL; | |
969 | return err; | |
970 | } | |
971 | ||
1da177e4 LT |
972 | static int __init sm_lm78_init(void) |
973 | { | |
fde09509 JD |
974 | int res; |
975 | ||
18c73f90 JD |
976 | /* We register the ISA device first, so that we can skip the |
977 | * registration of an I2C interface to the same device. */ | |
c40769fe JD |
978 | if (lm78_isa_found(isa_address)) { |
979 | res = platform_driver_register(&lm78_isa_driver); | |
980 | if (res) | |
18c73f90 | 981 | goto exit; |
fde09509 | 982 | |
c40769fe JD |
983 | /* Sets global pdev as a side effect */ |
984 | res = lm78_isa_device_add(isa_address); | |
985 | if (res) | |
986 | goto exit_unreg_isa_driver; | |
987 | } | |
fde09509 | 988 | |
18c73f90 JD |
989 | res = i2c_add_driver(&lm78_driver); |
990 | if (res) | |
991 | goto exit_unreg_isa_device; | |
992 | ||
fde09509 | 993 | return 0; |
c40769fe | 994 | |
18c73f90 JD |
995 | exit_unreg_isa_device: |
996 | platform_device_unregister(pdev); | |
c40769fe JD |
997 | exit_unreg_isa_driver: |
998 | platform_driver_unregister(&lm78_isa_driver); | |
c40769fe JD |
999 | exit: |
1000 | return res; | |
1da177e4 LT |
1001 | } |
1002 | ||
1003 | static void __exit sm_lm78_exit(void) | |
1004 | { | |
c40769fe JD |
1005 | if (pdev) { |
1006 | platform_device_unregister(pdev); | |
1007 | platform_driver_unregister(&lm78_isa_driver); | |
1008 | } | |
1da177e4 LT |
1009 | i2c_del_driver(&lm78_driver); |
1010 | } | |
1011 | ||
1012 | ||
1013 | ||
1014 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>"); | |
27fe048e | 1015 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
1016 | MODULE_LICENSE("GPL"); |
1017 | ||
1018 | module_init(sm_lm78_init); | |
1019 | module_exit(sm_lm78_exit); |