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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 | ||
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/init.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/jiffies.h> | |
26 | #include <linux/i2c.h> | |
c40769fe JD |
27 | #include <linux/platform_device.h> |
28 | #include <linux/ioport.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> |
6055fae8 | 34 | #include <linux/io.h> |
1da177e4 | 35 | |
c40769fe JD |
36 | /* ISA device, if found */ |
37 | static struct platform_device *pdev; | |
38 | ||
1da177e4 | 39 | /* Addresses to scan */ |
25e9c86d MH |
40 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
41 | 0x2e, 0x2f, I2C_CLIENT_END }; | |
2d8672c5 | 42 | static unsigned short isa_address = 0x290; |
1da177e4 | 43 | |
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 | ||
310ec792 | 144 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 JD |
145 | struct i2c_board_info *info); |
146 | static int lm78_i2c_probe(struct i2c_client *client, | |
147 | const struct i2c_device_id *id); | |
148 | static int lm78_i2c_remove(struct i2c_client *client); | |
1da177e4 | 149 | |
c40769fe JD |
150 | static int __devinit lm78_isa_probe(struct platform_device *pdev); |
151 | static int __devexit lm78_isa_remove(struct platform_device *pdev); | |
152 | ||
c59cc301 JD |
153 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
154 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 155 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 156 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 LT |
157 | |
158 | ||
0c6e9731 JD |
159 | static const struct i2c_device_id lm78_i2c_id[] = { |
160 | { "lm78", lm78 }, | |
161 | { "lm79", lm79 }, | |
162 | { } | |
163 | }; | |
164 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
165 | ||
1da177e4 | 166 | static struct i2c_driver lm78_driver = { |
0c6e9731 | 167 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 168 | .driver = { |
cdaf7934 LR |
169 | .name = "lm78", |
170 | }, | |
0c6e9731 JD |
171 | .probe = lm78_i2c_probe, |
172 | .remove = lm78_i2c_remove, | |
173 | .id_table = lm78_i2c_id, | |
174 | .detect = lm78_i2c_detect, | |
c3813d6a | 175 | .address_list = normal_i2c, |
1da177e4 LT |
176 | }; |
177 | ||
c40769fe | 178 | static struct platform_driver lm78_isa_driver = { |
cdaf7934 | 179 | .driver = { |
87218842 | 180 | .owner = THIS_MODULE, |
c40769fe | 181 | .name = "lm78", |
cdaf7934 | 182 | }, |
c40769fe | 183 | .probe = lm78_isa_probe, |
39d8bbed | 184 | .remove = __devexit_p(lm78_isa_remove), |
fde09509 JD |
185 | }; |
186 | ||
187 | ||
1da177e4 | 188 | /* 7 Voltages */ |
247dde4c JD |
189 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
190 | char *buf) | |
1da177e4 | 191 | { |
247dde4c | 192 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 193 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 194 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
1da177e4 LT |
195 | } |
196 | ||
247dde4c JD |
197 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
198 | char *buf) | |
1da177e4 | 199 | { |
247dde4c | 200 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 201 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 202 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index])); |
1da177e4 LT |
203 | } |
204 | ||
247dde4c JD |
205 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
206 | char *buf) | |
1da177e4 | 207 | { |
247dde4c | 208 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 209 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 210 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index])); |
1da177e4 LT |
211 | } |
212 | ||
247dde4c JD |
213 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
214 | const char *buf, size_t count) | |
1da177e4 | 215 | { |
247dde4c | 216 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 217 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 | 218 | unsigned long val = simple_strtoul(buf, NULL, 10); |
247dde4c | 219 | int nr = attr->index; |
1da177e4 | 220 | |
9a61bf63 | 221 | mutex_lock(&data->update_lock); |
1da177e4 | 222 | data->in_min[nr] = IN_TO_REG(val); |
c59cc301 | 223 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
9a61bf63 | 224 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
225 | return count; |
226 | } | |
227 | ||
247dde4c JD |
228 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
229 | const char *buf, size_t count) | |
1da177e4 | 230 | { |
247dde4c | 231 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 232 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 | 233 | unsigned long val = simple_strtoul(buf, NULL, 10); |
247dde4c | 234 | int nr = attr->index; |
1da177e4 | 235 | |
9a61bf63 | 236 | mutex_lock(&data->update_lock); |
1da177e4 | 237 | data->in_max[nr] = IN_TO_REG(val); |
c59cc301 | 238 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
9a61bf63 | 239 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
240 | return count; |
241 | } | |
242 | ||
243 | #define show_in_offset(offset) \ | |
247dde4c JD |
244 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
245 | show_in, NULL, offset); \ | |
246 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
247 | show_in_min, set_in_min, offset); \ | |
248 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
249 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
250 | |
251 | show_in_offset(0); | |
252 | show_in_offset(1); | |
253 | show_in_offset(2); | |
254 | show_in_offset(3); | |
255 | show_in_offset(4); | |
256 | show_in_offset(5); | |
257 | show_in_offset(6); | |
258 | ||
259 | /* Temperature */ | |
247dde4c JD |
260 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
261 | char *buf) | |
1da177e4 LT |
262 | { |
263 | struct lm78_data *data = lm78_update_device(dev); | |
264 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
265 | } | |
266 | ||
247dde4c JD |
267 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
268 | char *buf) | |
1da177e4 LT |
269 | { |
270 | struct lm78_data *data = lm78_update_device(dev); | |
271 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
272 | } | |
273 | ||
247dde4c JD |
274 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
275 | const char *buf, size_t count) | |
1da177e4 | 276 | { |
c40769fe | 277 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
278 | long val = simple_strtol(buf, NULL, 10); |
279 | ||
9a61bf63 | 280 | mutex_lock(&data->update_lock); |
1da177e4 | 281 | data->temp_over = TEMP_TO_REG(val); |
c59cc301 | 282 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
9a61bf63 | 283 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
284 | return count; |
285 | } | |
286 | ||
247dde4c JD |
287 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
288 | char *buf) | |
1da177e4 LT |
289 | { |
290 | struct lm78_data *data = lm78_update_device(dev); | |
291 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
292 | } | |
293 | ||
247dde4c JD |
294 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
295 | const char *buf, size_t count) | |
1da177e4 | 296 | { |
c40769fe | 297 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
298 | long val = simple_strtol(buf, NULL, 10); |
299 | ||
9a61bf63 | 300 | mutex_lock(&data->update_lock); |
1da177e4 | 301 | data->temp_hyst = TEMP_TO_REG(val); |
c59cc301 | 302 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
9a61bf63 | 303 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
304 | return count; |
305 | } | |
306 | ||
307 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); | |
308 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, | |
309 | show_temp_over, set_temp_over); | |
310 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, | |
311 | show_temp_hyst, set_temp_hyst); | |
312 | ||
313 | /* 3 Fans */ | |
247dde4c JD |
314 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
315 | char *buf) | |
1da177e4 | 316 | { |
247dde4c | 317 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 318 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 319 | int nr = attr->index; |
1da177e4 LT |
320 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
321 | DIV_FROM_REG(data->fan_div[nr])) ); | |
322 | } | |
323 | ||
247dde4c JD |
324 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
325 | char *buf) | |
1da177e4 | 326 | { |
247dde4c | 327 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 328 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 329 | int nr = attr->index; |
1da177e4 LT |
330 | return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr], |
331 | DIV_FROM_REG(data->fan_div[nr])) ); | |
332 | } | |
333 | ||
247dde4c JD |
334 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
335 | const char *buf, size_t count) | |
1da177e4 | 336 | { |
247dde4c | 337 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 338 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 339 | int nr = attr->index; |
1da177e4 LT |
340 | unsigned long val = simple_strtoul(buf, NULL, 10); |
341 | ||
9a61bf63 | 342 | mutex_lock(&data->update_lock); |
1da177e4 | 343 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
c59cc301 | 344 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 345 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
346 | return count; |
347 | } | |
348 | ||
247dde4c JD |
349 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
350 | char *buf) | |
1da177e4 | 351 | { |
247dde4c | 352 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 353 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 354 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
355 | } |
356 | ||
357 | /* Note: we save and restore the fan minimum here, because its value is | |
358 | determined in part by the fan divisor. This follows the principle of | |
d6e05edc | 359 | least surprise; the user doesn't expect the fan minimum to change just |
1da177e4 | 360 | because the divisor changed. */ |
247dde4c JD |
361 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
362 | const char *buf, size_t count) | |
1da177e4 | 363 | { |
247dde4c | 364 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 365 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 366 | int nr = attr->index; |
1da177e4 LT |
367 | unsigned long val = simple_strtoul(buf, NULL, 10); |
368 | unsigned long min; | |
369 | u8 reg; | |
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) { | |
376 | case 1: data->fan_div[nr] = 0; break; | |
377 | case 2: data->fan_div[nr] = 1; break; | |
378 | case 4: data->fan_div[nr] = 2; break; | |
379 | case 8: data->fan_div[nr] = 3; break; | |
380 | default: | |
c40769fe | 381 | dev_err(dev, "fan_div value %ld not " |
1da177e4 | 382 | "supported. Choose one of 1, 2, 4 or 8!\n", val); |
9a61bf63 | 383 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
384 | return -EINVAL; |
385 | } | |
386 | ||
c59cc301 | 387 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
1da177e4 LT |
388 | switch (nr) { |
389 | case 0: | |
390 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
391 | break; | |
392 | case 1: | |
393 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
394 | break; | |
395 | } | |
c59cc301 | 396 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
1da177e4 LT |
397 | |
398 | data->fan_min[nr] = | |
399 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
c59cc301 | 400 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 401 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
402 | |
403 | return count; | |
404 | } | |
405 | ||
247dde4c JD |
406 | #define show_fan_offset(offset) \ |
407 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
408 | show_fan, NULL, offset - 1); \ | |
409 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
410 | show_fan_min, set_fan_min, offset - 1); | |
1da177e4 LT |
411 | |
412 | show_fan_offset(1); | |
413 | show_fan_offset(2); | |
414 | show_fan_offset(3); | |
415 | ||
416 | /* Fan 3 divisor is locked in H/W */ | |
247dde4c JD |
417 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
418 | show_fan_div, set_fan_div, 0); | |
419 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
420 | show_fan_div, set_fan_div, 1); | |
421 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); | |
1da177e4 LT |
422 | |
423 | /* VID */ | |
247dde4c JD |
424 | static ssize_t show_vid(struct device *dev, struct device_attribute *da, |
425 | char *buf) | |
1da177e4 LT |
426 | { |
427 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 428 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 LT |
429 | } |
430 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
431 | ||
432 | /* Alarms */ | |
247dde4c JD |
433 | static ssize_t show_alarms(struct device *dev, struct device_attribute *da, |
434 | char *buf) | |
1da177e4 LT |
435 | { |
436 | struct lm78_data *data = lm78_update_device(dev); | |
437 | return sprintf(buf, "%u\n", data->alarms); | |
438 | } | |
439 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
440 | ||
428a7039 JD |
441 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
442 | char *buf) | |
443 | { | |
444 | struct lm78_data *data = lm78_update_device(dev); | |
445 | int nr = to_sensor_dev_attr(da)->index; | |
446 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
447 | } | |
448 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
449 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
450 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
451 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
452 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
453 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
454 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); | |
455 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
456 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
457 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
458 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
459 | ||
c1685f61 | 460 | static struct attribute *lm78_attributes[] = { |
247dde4c JD |
461 | &sensor_dev_attr_in0_input.dev_attr.attr, |
462 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
463 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 464 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
465 | &sensor_dev_attr_in1_input.dev_attr.attr, |
466 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
467 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 468 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
469 | &sensor_dev_attr_in2_input.dev_attr.attr, |
470 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
471 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 472 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
473 | &sensor_dev_attr_in3_input.dev_attr.attr, |
474 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
475 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 476 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
477 | &sensor_dev_attr_in4_input.dev_attr.attr, |
478 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
479 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 480 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
481 | &sensor_dev_attr_in5_input.dev_attr.attr, |
482 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
483 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 484 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
485 | &sensor_dev_attr_in6_input.dev_attr.attr, |
486 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
487 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 488 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
489 | &dev_attr_temp1_input.attr, |
490 | &dev_attr_temp1_max.attr, | |
491 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 492 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
493 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
494 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
495 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 496 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
497 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
498 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
499 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 500 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
501 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
502 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
503 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 504 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
505 | &dev_attr_alarms.attr, |
506 | &dev_attr_cpu0_vid.attr, | |
507 | ||
508 | NULL | |
509 | }; | |
510 | ||
511 | static const struct attribute_group lm78_group = { | |
512 | .attrs = lm78_attributes, | |
513 | }; | |
514 | ||
c40769fe JD |
515 | /* I2C devices get this name attribute automatically, but for ISA devices |
516 | we must create it by ourselves. */ | |
517 | static ssize_t show_name(struct device *dev, struct device_attribute | |
518 | *devattr, char *buf) | |
519 | { | |
520 | struct lm78_data *data = dev_get_drvdata(dev); | |
521 | ||
6e1b5029 | 522 | return sprintf(buf, "%s\n", data->name); |
c40769fe JD |
523 | } |
524 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
525 | ||
18c73f90 JD |
526 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
527 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
528 | { | |
0c6e9731 | 529 | struct lm78_data *isa; |
18c73f90 JD |
530 | int i; |
531 | ||
532 | if (!pdev) /* No ISA chip */ | |
533 | return 0; | |
18c73f90 JD |
534 | isa = platform_get_drvdata(pdev); |
535 | ||
536 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
537 | return 0; /* Address doesn't match */ | |
538 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
539 | return 0; /* Chip type doesn't match */ | |
540 | ||
541 | /* We compare all the limit registers, the config register and the | |
542 | * interrupt mask registers */ | |
543 | for (i = 0x2b; i <= 0x3d; i++) { | |
0c6e9731 JD |
544 | if (lm78_read_value(isa, i) != |
545 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
546 | return 0; |
547 | } | |
548 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 549 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
550 | return 0; |
551 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
552 | if (lm78_read_value(isa, i) != |
553 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
554 | return 0; |
555 | } | |
556 | ||
557 | return 1; | |
558 | } | |
559 | ||
310ec792 | 560 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 561 | struct i2c_board_info *info) |
1da177e4 | 562 | { |
0c6e9731 JD |
563 | int i; |
564 | struct lm78_data *isa = pdev ? platform_get_drvdata(pdev) : NULL; | |
565 | const char *client_name; | |
566 | struct i2c_adapter *adapter = client->adapter; | |
567 | int address = client->addr; | |
1da177e4 | 568 | |
0c6e9731 JD |
569 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
570 | return -ENODEV; | |
1da177e4 | 571 | |
0c6e9731 JD |
572 | /* We block updates of the ISA device to minimize the risk of |
573 | concurrent access to the same LM78 chip through different | |
574 | interfaces. */ | |
575 | if (isa) | |
576 | mutex_lock(&isa->update_lock); | |
1da177e4 | 577 | |
52df6440 JD |
578 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
579 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
580 | goto err_nodev; | |
581 | ||
582 | /* Explicitly prevent the misdetection of Winbond chips */ | |
583 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
584 | if (i == 0xa3 || i == 0x5c) | |
585 | goto err_nodev; | |
1da177e4 LT |
586 | |
587 | /* Determine the chip type. */ | |
52df6440 JD |
588 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
589 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
590 | || i == 0x40) /* LM78-J */ | |
591 | client_name = "lm78"; | |
592 | else if ((i & 0xfe) == 0xc0) | |
593 | client_name = "lm79"; | |
594 | else | |
595 | goto err_nodev; | |
596 | ||
597 | if (lm78_alias_detect(client, i)) { | |
598 | dev_dbg(&adapter->dev, "Device at 0x%02x appears to " | |
599 | "be the same as ISA device\n", address); | |
600 | goto err_nodev; | |
1da177e4 LT |
601 | } |
602 | ||
0c6e9731 JD |
603 | if (isa) |
604 | mutex_unlock(&isa->update_lock); | |
605 | ||
0c6e9731 | 606 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 607 | |
0c6e9731 | 608 | return 0; |
1da177e4 | 609 | |
0c6e9731 JD |
610 | err_nodev: |
611 | if (isa) | |
612 | mutex_unlock(&isa->update_lock); | |
613 | return -ENODEV; | |
614 | } | |
615 | ||
616 | static int lm78_i2c_probe(struct i2c_client *client, | |
617 | const struct i2c_device_id *id) | |
618 | { | |
619 | struct lm78_data *data; | |
620 | int err; | |
621 | ||
622 | data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL); | |
623 | if (!data) | |
624 | return -ENOMEM; | |
625 | ||
626 | i2c_set_clientdata(client, data); | |
627 | data->client = client; | |
628 | data->type = id->driver_data; | |
1da177e4 LT |
629 | |
630 | /* Initialize the LM78 chip */ | |
c59cc301 | 631 | lm78_init_device(data); |
1da177e4 | 632 | |
1da177e4 | 633 | /* Register sysfs hooks */ |
0c6e9731 JD |
634 | err = sysfs_create_group(&client->dev.kobj, &lm78_group); |
635 | if (err) | |
c1685f61 MH |
636 | goto ERROR3; |
637 | ||
0c6e9731 | 638 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
639 | if (IS_ERR(data->hwmon_dev)) { |
640 | err = PTR_ERR(data->hwmon_dev); | |
c1685f61 | 641 | goto ERROR4; |
943b0830 MH |
642 | } |
643 | ||
1da177e4 LT |
644 | return 0; |
645 | ||
c1685f61 | 646 | ERROR4: |
0c6e9731 | 647 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
943b0830 | 648 | ERROR3: |
1da177e4 | 649 | kfree(data); |
1da177e4 LT |
650 | return err; |
651 | } | |
652 | ||
0c6e9731 | 653 | static int lm78_i2c_remove(struct i2c_client *client) |
1da177e4 | 654 | { |
943b0830 | 655 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 | 656 | |
1beeffe4 | 657 | hwmon_device_unregister(data->hwmon_dev); |
c1685f61 | 658 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
c40769fe JD |
659 | kfree(data); |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static int __devinit lm78_isa_probe(struct platform_device *pdev) | |
665 | { | |
666 | int err; | |
667 | struct lm78_data *data; | |
668 | struct resource *res; | |
c40769fe JD |
669 | |
670 | /* Reserve the ISA region */ | |
671 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
47c15532 | 672 | if (!request_region(res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) { |
c40769fe JD |
673 | err = -EBUSY; |
674 | goto exit; | |
675 | } | |
676 | ||
677 | if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) { | |
678 | err = -ENOMEM; | |
679 | goto exit_release_region; | |
680 | } | |
681 | mutex_init(&data->lock); | |
6e1b5029 | 682 | data->isa_addr = res->start; |
c40769fe JD |
683 | platform_set_drvdata(pdev, data); |
684 | ||
c59cc301 | 685 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { |
c40769fe | 686 | data->type = lm79; |
6e1b5029 | 687 | data->name = "lm79"; |
c40769fe JD |
688 | } else { |
689 | data->type = lm78; | |
6e1b5029 | 690 | data->name = "lm78"; |
c40769fe | 691 | } |
c40769fe JD |
692 | |
693 | /* Initialize the LM78 chip */ | |
c59cc301 | 694 | lm78_init_device(data); |
c40769fe JD |
695 | |
696 | /* Register sysfs hooks */ | |
697 | if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group)) | |
698 | || (err = device_create_file(&pdev->dev, &dev_attr_name))) | |
699 | goto exit_remove_files; | |
700 | ||
1beeffe4 TJ |
701 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
702 | if (IS_ERR(data->hwmon_dev)) { | |
703 | err = PTR_ERR(data->hwmon_dev); | |
c40769fe JD |
704 | goto exit_remove_files; |
705 | } | |
706 | ||
707 | return 0; | |
708 | ||
709 | exit_remove_files: | |
710 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
711 | device_remove_file(&pdev->dev, &dev_attr_name); | |
712 | kfree(data); | |
713 | exit_release_region: | |
47c15532 | 714 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); |
c40769fe JD |
715 | exit: |
716 | return err; | |
717 | } | |
718 | ||
719 | static int __devexit lm78_isa_remove(struct platform_device *pdev) | |
720 | { | |
721 | struct lm78_data *data = platform_get_drvdata(pdev); | |
6e1b5029 | 722 | struct resource *res; |
1da177e4 | 723 | |
1beeffe4 | 724 | hwmon_device_unregister(data->hwmon_dev); |
c40769fe JD |
725 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); |
726 | device_remove_file(&pdev->dev, &dev_attr_name); | |
943b0830 | 727 | kfree(data); |
1da177e4 | 728 | |
6e1b5029 JD |
729 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
730 | release_region(res->start + LM78_ADDR_REG_OFFSET, 2); | |
731 | ||
1da177e4 LT |
732 | return 0; |
733 | } | |
734 | ||
44bbe87e | 735 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
1da177e4 LT |
736 | We don't want to lock the whole ISA bus, so we lock each client |
737 | separately. | |
738 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
739 | would slow down the LM78 access and should not be necessary. */ | |
c59cc301 | 740 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 741 | { |
0c6e9731 | 742 | struct i2c_client *client = data->client; |
c59cc301 | 743 | |
0c6e9731 | 744 | if (!client) { /* ISA device */ |
c59cc301 | 745 | int res; |
9a61bf63 | 746 | mutex_lock(&data->lock); |
6e1b5029 JD |
747 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
748 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 749 | mutex_unlock(&data->lock); |
1da177e4 LT |
750 | return res; |
751 | } else | |
752 | return i2c_smbus_read_byte_data(client, reg); | |
753 | } | |
754 | ||
44bbe87e | 755 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
1da177e4 LT |
756 | We don't want to lock the whole ISA bus, so we lock each client |
757 | separately. | |
758 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
759 | would slow down the LM78 access and should not be necessary. | |
760 | There are some ugly typecasts here, but the good new is - they should | |
761 | nowhere else be necessary! */ | |
c59cc301 | 762 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 763 | { |
0c6e9731 | 764 | struct i2c_client *client = data->client; |
c59cc301 | 765 | |
0c6e9731 | 766 | if (!client) { /* ISA device */ |
9a61bf63 | 767 | mutex_lock(&data->lock); |
6e1b5029 JD |
768 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
769 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 770 | mutex_unlock(&data->lock); |
1da177e4 LT |
771 | return 0; |
772 | } else | |
773 | return i2c_smbus_write_byte_data(client, reg, value); | |
774 | } | |
775 | ||
c59cc301 | 776 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 777 | { |
c40769fe JD |
778 | u8 config; |
779 | int i; | |
1da177e4 LT |
780 | |
781 | /* Start monitoring */ | |
c59cc301 | 782 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 783 | if ((config & 0x09) != 0x01) |
c59cc301 | 784 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 785 | (config & 0xf7) | 0x01); |
c40769fe JD |
786 | |
787 | /* A few vars need to be filled upon startup */ | |
788 | for (i = 0; i < 3; i++) { | |
c59cc301 | 789 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
790 | LM78_REG_FAN_MIN(i)); |
791 | } | |
792 | ||
793 | mutex_init(&data->update_lock); | |
1da177e4 LT |
794 | } |
795 | ||
796 | static struct lm78_data *lm78_update_device(struct device *dev) | |
797 | { | |
c40769fe | 798 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
799 | int i; |
800 | ||
9a61bf63 | 801 | mutex_lock(&data->update_lock); |
1da177e4 LT |
802 | |
803 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
804 | || !data->valid) { | |
805 | ||
c40769fe | 806 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
807 | |
808 | for (i = 0; i <= 6; i++) { | |
809 | data->in[i] = | |
c59cc301 | 810 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 811 | data->in_min[i] = |
c59cc301 | 812 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 813 | data->in_max[i] = |
c59cc301 | 814 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
815 | } |
816 | for (i = 0; i < 3; i++) { | |
817 | data->fan[i] = | |
c59cc301 | 818 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 819 | data->fan_min[i] = |
c59cc301 | 820 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 821 | } |
c59cc301 | 822 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 823 | data->temp_over = |
c59cc301 | 824 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 825 | data->temp_hyst = |
c59cc301 JD |
826 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
827 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
828 | data->vid = i & 0x0f; |
829 | if (data->type == lm79) | |
830 | data->vid |= | |
c59cc301 | 831 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
832 | 0x01) << 4; |
833 | else | |
834 | data->vid |= 0x10; | |
835 | data->fan_div[0] = (i >> 4) & 0x03; | |
836 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
837 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
838 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
839 | data->last_updated = jiffies; |
840 | data->valid = 1; | |
841 | ||
842 | data->fan_div[2] = 1; | |
843 | } | |
844 | ||
9a61bf63 | 845 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
846 | |
847 | return data; | |
848 | } | |
849 | ||
c40769fe JD |
850 | /* return 1 if a supported chip is found, 0 otherwise */ |
851 | static int __init lm78_isa_found(unsigned short address) | |
852 | { | |
853 | int val, save, found = 0; | |
197027e6 JD |
854 | int port; |
855 | ||
856 | /* Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
857 | * to base+7 and some base+5 to base+6. So we better request each port | |
858 | * individually for the probing phase. */ | |
859 | for (port = address; port < address + LM78_EXTENT; port++) { | |
860 | if (!request_region(port, 1, "lm78")) { | |
861 | pr_debug("lm78: Failed to request port 0x%x\n", port); | |
862 | goto release; | |
863 | } | |
47c15532 | 864 | } |
c40769fe JD |
865 | |
866 | #define REALLY_SLOW_IO | |
867 | /* We need the timeouts for at least some LM78-like | |
868 | chips. But only if we read 'undefined' registers. */ | |
869 | val = inb_p(address + 1); | |
870 | if (inb_p(address + 2) != val | |
871 | || inb_p(address + 3) != val | |
872 | || inb_p(address + 7) != val) | |
873 | goto release; | |
874 | #undef REALLY_SLOW_IO | |
875 | ||
876 | /* We should be able to change the 7 LSB of the address port. The | |
877 | MSB (busy flag) should be clear initially, set after the write. */ | |
878 | save = inb_p(address + LM78_ADDR_REG_OFFSET); | |
879 | if (save & 0x80) | |
880 | goto release; | |
881 | val = ~save & 0x7f; | |
882 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
883 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
884 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
885 | goto release; | |
886 | } | |
887 | ||
888 | /* We found a device, now see if it could be an LM78 */ | |
889 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
890 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
891 | if (val & 0x80) | |
892 | goto release; | |
893 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
894 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
895 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
896 | goto release; | |
897 | ||
898 | /* The busy flag should be clear again */ | |
899 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
900 | goto release; | |
901 | ||
902 | /* Explicitly prevent the misdetection of Winbond chips */ | |
903 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
904 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
905 | if (val == 0xa3 || val == 0x5c) | |
906 | goto release; | |
907 | ||
908 | /* Explicitly prevent the misdetection of ITE chips */ | |
909 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
910 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
911 | if (val == 0x90) | |
912 | goto release; | |
913 | ||
914 | /* Determine the chip type */ | |
915 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
916 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 917 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
918 | || val == 0x40 /* LM78-J */ |
919 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
920 | found = 1; | |
921 | ||
922 | if (found) | |
923 | pr_info("lm78: Found an %s chip at %#x\n", | |
924 | val & 0x80 ? "LM79" : "LM78", (int)address); | |
925 | ||
926 | release: | |
197027e6 JD |
927 | for (port--; port >= address; port--) |
928 | release_region(port, 1); | |
c40769fe JD |
929 | return found; |
930 | } | |
931 | ||
932 | static int __init lm78_isa_device_add(unsigned short address) | |
933 | { | |
934 | struct resource res = { | |
935 | .start = address, | |
15bde2f1 | 936 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
937 | .name = "lm78", |
938 | .flags = IORESOURCE_IO, | |
939 | }; | |
940 | int err; | |
941 | ||
942 | pdev = platform_device_alloc("lm78", address); | |
943 | if (!pdev) { | |
944 | err = -ENOMEM; | |
945 | printk(KERN_ERR "lm78: Device allocation failed\n"); | |
946 | goto exit; | |
947 | } | |
948 | ||
949 | err = platform_device_add_resources(pdev, &res, 1); | |
950 | if (err) { | |
951 | printk(KERN_ERR "lm78: Device resource addition failed " | |
952 | "(%d)\n", err); | |
953 | goto exit_device_put; | |
954 | } | |
955 | ||
956 | err = platform_device_add(pdev); | |
957 | if (err) { | |
958 | printk(KERN_ERR "lm78: Device addition failed (%d)\n", | |
959 | err); | |
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); |