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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> |
1da177e4 LT |
34 | #include <asm/io.h> |
35 | ||
c40769fe JD |
36 | /* ISA device, if found */ |
37 | static struct platform_device *pdev; | |
38 | ||
1da177e4 LT |
39 | /* Addresses to scan */ |
40 | static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24, | |
41 | 0x25, 0x26, 0x27, 0x28, 0x29, | |
42 | 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, | |
43 | 0x2f, I2C_CLIENT_END }; | |
2d8672c5 | 44 | static unsigned short isa_address = 0x290; |
1da177e4 LT |
45 | |
46 | /* Insmod parameters */ | |
f4b50261 | 47 | I2C_CLIENT_INSMOD_2(lm78, lm79); |
1da177e4 LT |
48 | |
49 | /* Many LM78 constants specified below */ | |
50 | ||
51 | /* Length of ISA address segment */ | |
52 | #define LM78_EXTENT 8 | |
53 | ||
54 | /* Where are the ISA address/data registers relative to the base address */ | |
55 | #define LM78_ADDR_REG_OFFSET 5 | |
56 | #define LM78_DATA_REG_OFFSET 6 | |
57 | ||
58 | /* The LM78 registers */ | |
59 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
60 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
61 | #define LM78_REG_IN(nr) (0x20 + (nr)) | |
62 | ||
63 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) | |
64 | #define LM78_REG_FAN(nr) (0x28 + (nr)) | |
65 | ||
66 | #define LM78_REG_TEMP 0x27 | |
67 | #define LM78_REG_TEMP_OVER 0x39 | |
68 | #define LM78_REG_TEMP_HYST 0x3a | |
69 | ||
70 | #define LM78_REG_ALARM1 0x41 | |
71 | #define LM78_REG_ALARM2 0x42 | |
72 | ||
73 | #define LM78_REG_VID_FANDIV 0x47 | |
74 | ||
75 | #define LM78_REG_CONFIG 0x40 | |
76 | #define LM78_REG_CHIPID 0x49 | |
77 | #define LM78_REG_I2C_ADDR 0x48 | |
78 | ||
79 | ||
80 | /* Conversions. Rounding and limit checking is only done on the TO_REG | |
81 | variants. */ | |
82 | ||
83 | /* IN: mV, (0V to 4.08V) | |
84 | REG: 16mV/bit */ | |
85 | static inline u8 IN_TO_REG(unsigned long val) | |
86 | { | |
87 | unsigned long nval = SENSORS_LIMIT(val, 0, 4080); | |
88 | return (nval + 8) / 16; | |
89 | } | |
90 | #define IN_FROM_REG(val) ((val) * 16) | |
91 | ||
92 | static inline u8 FAN_TO_REG(long rpm, int div) | |
93 | { | |
94 | if (rpm <= 0) | |
95 | return 255; | |
96 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
97 | } | |
98 | ||
99 | static inline int FAN_FROM_REG(u8 val, int div) | |
100 | { | |
101 | return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div); | |
102 | } | |
103 | ||
104 | /* TEMP: mC (-128C to +127C) | |
105 | REG: 1C/bit, two's complement */ | |
106 | static inline s8 TEMP_TO_REG(int val) | |
107 | { | |
108 | int nval = SENSORS_LIMIT(val, -128000, 127000) ; | |
109 | return nval<0 ? (nval-500)/1000 : (nval+500)/1000; | |
110 | } | |
111 | ||
112 | static inline int TEMP_FROM_REG(s8 val) | |
113 | { | |
114 | return val * 1000; | |
115 | } | |
116 | ||
1da177e4 LT |
117 | #define DIV_FROM_REG(val) (1 << (val)) |
118 | ||
119 | /* There are some complications in a module like this. First off, LM78 chips | |
120 | may be both present on the SMBus and the ISA bus, and we have to handle | |
121 | those cases separately at some places. Second, there might be several | |
122 | LM78 chips available (well, actually, that is probably never done; but | |
123 | it is a clean illustration of how to handle a case like that). Finally, | |
124 | a specific chip may be attached to *both* ISA and SMBus, and we would | |
125 | not like to detect it double. Fortunately, in the case of the LM78 at | |
126 | least, a register tells us what SMBus address we are on, so that helps | |
127 | a bit - except if there could be more than one SMBus. Groan. No solution | |
128 | for this yet. */ | |
129 | ||
c40769fe JD |
130 | /* For ISA chips, we abuse the i2c_client addr and name fields. We also use |
131 | the driver field to differentiate between I2C and ISA chips. */ | |
1da177e4 LT |
132 | struct lm78_data { |
133 | struct i2c_client client; | |
1beeffe4 | 134 | struct device *hwmon_dev; |
9a61bf63 | 135 | struct mutex lock; |
1da177e4 LT |
136 | enum chips type; |
137 | ||
9a61bf63 | 138 | struct mutex update_lock; |
1da177e4 LT |
139 | char valid; /* !=0 if following fields are valid */ |
140 | unsigned long last_updated; /* In jiffies */ | |
141 | ||
142 | u8 in[7]; /* Register value */ | |
143 | u8 in_max[7]; /* Register value */ | |
144 | u8 in_min[7]; /* Register value */ | |
145 | u8 fan[3]; /* Register value */ | |
146 | u8 fan_min[3]; /* Register value */ | |
147 | s8 temp; /* Register value */ | |
148 | s8 temp_over; /* Register value */ | |
149 | s8 temp_hyst; /* Register value */ | |
150 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
151 | u8 vid; /* Register encoding, combined */ | |
152 | u16 alarms; /* Register encoding, combined */ | |
153 | }; | |
154 | ||
155 | ||
156 | static int lm78_attach_adapter(struct i2c_adapter *adapter); | |
157 | static int lm78_detect(struct i2c_adapter *adapter, int address, int kind); | |
158 | static int lm78_detach_client(struct i2c_client *client); | |
159 | ||
c40769fe JD |
160 | static int __devinit lm78_isa_probe(struct platform_device *pdev); |
161 | static int __devexit lm78_isa_remove(struct platform_device *pdev); | |
162 | ||
c59cc301 JD |
163 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
164 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 165 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 166 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 LT |
167 | |
168 | ||
169 | static struct i2c_driver lm78_driver = { | |
cdaf7934 | 170 | .driver = { |
cdaf7934 LR |
171 | .name = "lm78", |
172 | }, | |
1da177e4 | 173 | .id = I2C_DRIVERID_LM78, |
1da177e4 LT |
174 | .attach_adapter = lm78_attach_adapter, |
175 | .detach_client = lm78_detach_client, | |
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 JD |
183 | .probe = lm78_isa_probe, |
184 | .remove = 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 | ||
1da177e4 LT |
460 | /* This function is called when: |
461 | * lm78_driver is inserted (when this module is loaded), for each | |
462 | available adapter | |
463 | * when a new adapter is inserted (and lm78_driver is still present) */ | |
464 | static int lm78_attach_adapter(struct i2c_adapter *adapter) | |
465 | { | |
466 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
467 | return 0; | |
2ed2dc3c | 468 | return i2c_probe(adapter, &addr_data, lm78_detect); |
1da177e4 LT |
469 | } |
470 | ||
c1685f61 | 471 | static struct attribute *lm78_attributes[] = { |
247dde4c JD |
472 | &sensor_dev_attr_in0_input.dev_attr.attr, |
473 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
474 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 475 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
476 | &sensor_dev_attr_in1_input.dev_attr.attr, |
477 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
478 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 479 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
480 | &sensor_dev_attr_in2_input.dev_attr.attr, |
481 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
482 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 483 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
484 | &sensor_dev_attr_in3_input.dev_attr.attr, |
485 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
486 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 487 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
488 | &sensor_dev_attr_in4_input.dev_attr.attr, |
489 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
490 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 491 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
492 | &sensor_dev_attr_in5_input.dev_attr.attr, |
493 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
494 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 495 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
496 | &sensor_dev_attr_in6_input.dev_attr.attr, |
497 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
498 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 499 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
500 | &dev_attr_temp1_input.attr, |
501 | &dev_attr_temp1_max.attr, | |
502 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 503 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
504 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
505 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
506 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 507 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
508 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
509 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
510 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 511 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
512 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
513 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
514 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 515 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
516 | &dev_attr_alarms.attr, |
517 | &dev_attr_cpu0_vid.attr, | |
518 | ||
519 | NULL | |
520 | }; | |
521 | ||
522 | static const struct attribute_group lm78_group = { | |
523 | .attrs = lm78_attributes, | |
524 | }; | |
525 | ||
c40769fe JD |
526 | /* I2C devices get this name attribute automatically, but for ISA devices |
527 | we must create it by ourselves. */ | |
528 | static ssize_t show_name(struct device *dev, struct device_attribute | |
529 | *devattr, char *buf) | |
530 | { | |
531 | struct lm78_data *data = dev_get_drvdata(dev); | |
532 | ||
533 | return sprintf(buf, "%s\n", data->client.name); | |
534 | } | |
535 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
536 | ||
2ed2dc3c | 537 | /* This function is called by i2c_probe */ |
d8d20615 | 538 | static int lm78_detect(struct i2c_adapter *adapter, int address, int kind) |
1da177e4 LT |
539 | { |
540 | int i, err; | |
541 | struct i2c_client *new_client; | |
542 | struct lm78_data *data; | |
543 | const char *client_name = ""; | |
1da177e4 | 544 | |
c40769fe | 545 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
1da177e4 | 546 | err = -ENODEV; |
c40769fe | 547 | goto ERROR1; |
1da177e4 LT |
548 | } |
549 | ||
550 | /* OK. For now, we presume we have a valid client. We now create the | |
551 | client structure, even though we cannot fill it completely yet. | |
552 | But it allows us to access lm78_{read,write}_value. */ | |
553 | ||
ba9c2e8d | 554 | if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) { |
1da177e4 LT |
555 | err = -ENOMEM; |
556 | goto ERROR1; | |
557 | } | |
1da177e4 LT |
558 | |
559 | new_client = &data->client; | |
1da177e4 LT |
560 | i2c_set_clientdata(new_client, data); |
561 | new_client->addr = address; | |
562 | new_client->adapter = adapter; | |
c40769fe | 563 | new_client->driver = &lm78_driver; |
1da177e4 LT |
564 | |
565 | /* Now, we do the remaining detection. */ | |
566 | if (kind < 0) { | |
c59cc301 | 567 | if (lm78_read_value(data, LM78_REG_CONFIG) & 0x80) { |
1da177e4 LT |
568 | err = -ENODEV; |
569 | goto ERROR2; | |
570 | } | |
c59cc301 | 571 | if (lm78_read_value(data, LM78_REG_I2C_ADDR) != |
c40769fe | 572 | address) { |
1da177e4 LT |
573 | err = -ENODEV; |
574 | goto ERROR2; | |
575 | } | |
576 | } | |
577 | ||
578 | /* Determine the chip type. */ | |
579 | if (kind <= 0) { | |
c59cc301 | 580 | i = lm78_read_value(data, LM78_REG_CHIPID); |
27fe048e JD |
581 | if (i == 0x00 || i == 0x20 /* LM78 */ |
582 | || i == 0x40) /* LM78-J */ | |
1da177e4 | 583 | kind = lm78; |
1da177e4 LT |
584 | else if ((i & 0xfe) == 0xc0) |
585 | kind = lm79; | |
586 | else { | |
587 | if (kind == 0) | |
588 | dev_warn(&adapter->dev, "Ignoring 'force' " | |
589 | "parameter for unknown chip at " | |
590 | "adapter %d, address 0x%02x\n", | |
591 | i2c_adapter_id(adapter), address); | |
592 | err = -ENODEV; | |
593 | goto ERROR2; | |
594 | } | |
595 | } | |
596 | ||
597 | if (kind == lm78) { | |
598 | client_name = "lm78"; | |
1da177e4 LT |
599 | } else if (kind == lm79) { |
600 | client_name = "lm79"; | |
601 | } | |
602 | ||
603 | /* Fill in the remaining client fields and put into the global list */ | |
604 | strlcpy(new_client->name, client_name, I2C_NAME_SIZE); | |
605 | data->type = kind; | |
606 | ||
1da177e4 LT |
607 | /* Tell the I2C layer a new client has arrived */ |
608 | if ((err = i2c_attach_client(new_client))) | |
609 | goto ERROR2; | |
610 | ||
611 | /* Initialize the LM78 chip */ | |
c59cc301 | 612 | lm78_init_device(data); |
1da177e4 | 613 | |
1da177e4 | 614 | /* Register sysfs hooks */ |
c1685f61 MH |
615 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm78_group))) |
616 | goto ERROR3; | |
617 | ||
1beeffe4 TJ |
618 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
619 | if (IS_ERR(data->hwmon_dev)) { | |
620 | err = PTR_ERR(data->hwmon_dev); | |
c1685f61 | 621 | goto ERROR4; |
943b0830 MH |
622 | } |
623 | ||
1da177e4 LT |
624 | return 0; |
625 | ||
c1685f61 MH |
626 | ERROR4: |
627 | sysfs_remove_group(&new_client->dev.kobj, &lm78_group); | |
943b0830 MH |
628 | ERROR3: |
629 | i2c_detach_client(new_client); | |
1da177e4 LT |
630 | ERROR2: |
631 | kfree(data); | |
632 | ERROR1: | |
1da177e4 LT |
633 | return err; |
634 | } | |
635 | ||
636 | static int lm78_detach_client(struct i2c_client *client) | |
637 | { | |
943b0830 | 638 | struct lm78_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
639 | int err; |
640 | ||
1beeffe4 | 641 | hwmon_device_unregister(data->hwmon_dev); |
c1685f61 | 642 | sysfs_remove_group(&client->dev.kobj, &lm78_group); |
943b0830 | 643 | |
7bef5594 | 644 | if ((err = i2c_detach_client(client))) |
1da177e4 | 645 | return err; |
1da177e4 | 646 | |
c40769fe JD |
647 | kfree(data); |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
652 | static int __devinit lm78_isa_probe(struct platform_device *pdev) | |
653 | { | |
654 | int err; | |
655 | struct lm78_data *data; | |
656 | struct resource *res; | |
657 | const char *name; | |
658 | ||
659 | /* Reserve the ISA region */ | |
660 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
661 | if (!request_region(res->start, LM78_EXTENT, "lm78")) { | |
662 | err = -EBUSY; | |
663 | goto exit; | |
664 | } | |
665 | ||
666 | if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) { | |
667 | err = -ENOMEM; | |
668 | goto exit_release_region; | |
669 | } | |
670 | mutex_init(&data->lock); | |
671 | data->client.addr = res->start; | |
672 | i2c_set_clientdata(&data->client, data); | |
673 | platform_set_drvdata(pdev, data); | |
674 | ||
c59cc301 | 675 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { |
c40769fe JD |
676 | data->type = lm79; |
677 | name = "lm79"; | |
678 | } else { | |
679 | data->type = lm78; | |
680 | name = "lm78"; | |
681 | } | |
682 | strlcpy(data->client.name, name, I2C_NAME_SIZE); | |
683 | ||
684 | /* Initialize the LM78 chip */ | |
c59cc301 | 685 | lm78_init_device(data); |
c40769fe JD |
686 | |
687 | /* Register sysfs hooks */ | |
688 | if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group)) | |
689 | || (err = device_create_file(&pdev->dev, &dev_attr_name))) | |
690 | goto exit_remove_files; | |
691 | ||
1beeffe4 TJ |
692 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
693 | if (IS_ERR(data->hwmon_dev)) { | |
694 | err = PTR_ERR(data->hwmon_dev); | |
c40769fe JD |
695 | goto exit_remove_files; |
696 | } | |
697 | ||
698 | return 0; | |
699 | ||
700 | exit_remove_files: | |
701 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); | |
702 | device_remove_file(&pdev->dev, &dev_attr_name); | |
703 | kfree(data); | |
704 | exit_release_region: | |
705 | release_region(res->start, LM78_EXTENT); | |
706 | exit: | |
707 | return err; | |
708 | } | |
709 | ||
710 | static int __devexit lm78_isa_remove(struct platform_device *pdev) | |
711 | { | |
712 | struct lm78_data *data = platform_get_drvdata(pdev); | |
1da177e4 | 713 | |
1beeffe4 | 714 | hwmon_device_unregister(data->hwmon_dev); |
c40769fe JD |
715 | sysfs_remove_group(&pdev->dev.kobj, &lm78_group); |
716 | device_remove_file(&pdev->dev, &dev_attr_name); | |
717 | release_region(data->client.addr, LM78_EXTENT); | |
943b0830 | 718 | kfree(data); |
1da177e4 LT |
719 | |
720 | return 0; | |
721 | } | |
722 | ||
44bbe87e | 723 | /* The SMBus locks itself, but ISA access must be locked explicitly! |
1da177e4 LT |
724 | We don't want to lock the whole ISA bus, so we lock each client |
725 | separately. | |
726 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
727 | would slow down the LM78 access and should not be necessary. */ | |
c59cc301 | 728 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 729 | { |
c59cc301 JD |
730 | struct i2c_client *client = &data->client; |
731 | ||
c40769fe | 732 | if (!client->driver) { /* ISA device */ |
c59cc301 | 733 | int res; |
9a61bf63 | 734 | mutex_lock(&data->lock); |
1da177e4 LT |
735 | outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET); |
736 | res = inb_p(client->addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 737 | mutex_unlock(&data->lock); |
1da177e4 LT |
738 | return res; |
739 | } else | |
740 | return i2c_smbus_read_byte_data(client, reg); | |
741 | } | |
742 | ||
44bbe87e | 743 | /* The SMBus locks itself, but ISA access muse be locked explicitly! |
1da177e4 LT |
744 | We don't want to lock the whole ISA bus, so we lock each client |
745 | separately. | |
746 | We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
747 | would slow down the LM78 access and should not be necessary. | |
748 | There are some ugly typecasts here, but the good new is - they should | |
749 | nowhere else be necessary! */ | |
c59cc301 | 750 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 751 | { |
c59cc301 JD |
752 | struct i2c_client *client = &data->client; |
753 | ||
c40769fe | 754 | if (!client->driver) { /* ISA device */ |
9a61bf63 | 755 | mutex_lock(&data->lock); |
1da177e4 LT |
756 | outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET); |
757 | outb_p(value, client->addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 758 | mutex_unlock(&data->lock); |
1da177e4 LT |
759 | return 0; |
760 | } else | |
761 | return i2c_smbus_write_byte_data(client, reg, value); | |
762 | } | |
763 | ||
c59cc301 | 764 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 765 | { |
c40769fe JD |
766 | u8 config; |
767 | int i; | |
1da177e4 LT |
768 | |
769 | /* Start monitoring */ | |
c59cc301 | 770 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 771 | if ((config & 0x09) != 0x01) |
c59cc301 | 772 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 773 | (config & 0xf7) | 0x01); |
c40769fe JD |
774 | |
775 | /* A few vars need to be filled upon startup */ | |
776 | for (i = 0; i < 3; i++) { | |
c59cc301 | 777 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
778 | LM78_REG_FAN_MIN(i)); |
779 | } | |
780 | ||
781 | mutex_init(&data->update_lock); | |
1da177e4 LT |
782 | } |
783 | ||
784 | static struct lm78_data *lm78_update_device(struct device *dev) | |
785 | { | |
c40769fe | 786 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
787 | int i; |
788 | ||
9a61bf63 | 789 | mutex_lock(&data->update_lock); |
1da177e4 LT |
790 | |
791 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
792 | || !data->valid) { | |
793 | ||
c40769fe | 794 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
795 | |
796 | for (i = 0; i <= 6; i++) { | |
797 | data->in[i] = | |
c59cc301 | 798 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 799 | data->in_min[i] = |
c59cc301 | 800 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 801 | data->in_max[i] = |
c59cc301 | 802 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
803 | } |
804 | for (i = 0; i < 3; i++) { | |
805 | data->fan[i] = | |
c59cc301 | 806 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 807 | data->fan_min[i] = |
c59cc301 | 808 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 809 | } |
c59cc301 | 810 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 811 | data->temp_over = |
c59cc301 | 812 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 813 | data->temp_hyst = |
c59cc301 JD |
814 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
815 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
816 | data->vid = i & 0x0f; |
817 | if (data->type == lm79) | |
818 | data->vid |= | |
c59cc301 | 819 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
820 | 0x01) << 4; |
821 | else | |
822 | data->vid |= 0x10; | |
823 | data->fan_div[0] = (i >> 4) & 0x03; | |
824 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
825 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
826 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
827 | data->last_updated = jiffies; |
828 | data->valid = 1; | |
829 | ||
830 | data->fan_div[2] = 1; | |
831 | } | |
832 | ||
9a61bf63 | 833 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
834 | |
835 | return data; | |
836 | } | |
837 | ||
c40769fe JD |
838 | /* return 1 if a supported chip is found, 0 otherwise */ |
839 | static int __init lm78_isa_found(unsigned short address) | |
840 | { | |
841 | int val, save, found = 0; | |
842 | ||
843 | if (!request_region(address, LM78_EXTENT, "lm78")) | |
844 | return 0; | |
845 | ||
846 | #define REALLY_SLOW_IO | |
847 | /* We need the timeouts for at least some LM78-like | |
848 | chips. But only if we read 'undefined' registers. */ | |
849 | val = inb_p(address + 1); | |
850 | if (inb_p(address + 2) != val | |
851 | || inb_p(address + 3) != val | |
852 | || inb_p(address + 7) != val) | |
853 | goto release; | |
854 | #undef REALLY_SLOW_IO | |
855 | ||
856 | /* We should be able to change the 7 LSB of the address port. The | |
857 | MSB (busy flag) should be clear initially, set after the write. */ | |
858 | save = inb_p(address + LM78_ADDR_REG_OFFSET); | |
859 | if (save & 0x80) | |
860 | goto release; | |
861 | val = ~save & 0x7f; | |
862 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
863 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
864 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
865 | goto release; | |
866 | } | |
867 | ||
868 | /* We found a device, now see if it could be an LM78 */ | |
869 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
870 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
871 | if (val & 0x80) | |
872 | goto release; | |
873 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
874 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
875 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
876 | goto release; | |
877 | ||
878 | /* The busy flag should be clear again */ | |
879 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
880 | goto release; | |
881 | ||
882 | /* Explicitly prevent the misdetection of Winbond chips */ | |
883 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
884 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
885 | if (val == 0xa3 || val == 0x5c) | |
886 | goto release; | |
887 | ||
888 | /* Explicitly prevent the misdetection of ITE chips */ | |
889 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
890 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
891 | if (val == 0x90) | |
892 | goto release; | |
893 | ||
894 | /* Determine the chip type */ | |
895 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
896 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 897 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
898 | || val == 0x40 /* LM78-J */ |
899 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
900 | found = 1; | |
901 | ||
902 | if (found) | |
903 | pr_info("lm78: Found an %s chip at %#x\n", | |
904 | val & 0x80 ? "LM79" : "LM78", (int)address); | |
905 | ||
906 | release: | |
907 | release_region(address, LM78_EXTENT); | |
908 | return found; | |
909 | } | |
910 | ||
911 | static int __init lm78_isa_device_add(unsigned short address) | |
912 | { | |
913 | struct resource res = { | |
914 | .start = address, | |
15bde2f1 | 915 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
916 | .name = "lm78", |
917 | .flags = IORESOURCE_IO, | |
918 | }; | |
919 | int err; | |
920 | ||
921 | pdev = platform_device_alloc("lm78", address); | |
922 | if (!pdev) { | |
923 | err = -ENOMEM; | |
924 | printk(KERN_ERR "lm78: Device allocation failed\n"); | |
925 | goto exit; | |
926 | } | |
927 | ||
928 | err = platform_device_add_resources(pdev, &res, 1); | |
929 | if (err) { | |
930 | printk(KERN_ERR "lm78: Device resource addition failed " | |
931 | "(%d)\n", err); | |
932 | goto exit_device_put; | |
933 | } | |
934 | ||
935 | err = platform_device_add(pdev); | |
936 | if (err) { | |
937 | printk(KERN_ERR "lm78: Device addition failed (%d)\n", | |
938 | err); | |
939 | goto exit_device_put; | |
940 | } | |
941 | ||
942 | return 0; | |
943 | ||
944 | exit_device_put: | |
945 | platform_device_put(pdev); | |
946 | exit: | |
947 | pdev = NULL; | |
948 | return err; | |
949 | } | |
950 | ||
1da177e4 LT |
951 | static int __init sm_lm78_init(void) |
952 | { | |
fde09509 JD |
953 | int res; |
954 | ||
955 | res = i2c_add_driver(&lm78_driver); | |
956 | if (res) | |
c40769fe JD |
957 | goto exit; |
958 | ||
959 | if (lm78_isa_found(isa_address)) { | |
960 | res = platform_driver_register(&lm78_isa_driver); | |
961 | if (res) | |
962 | goto exit_unreg_i2c_driver; | |
fde09509 | 963 | |
c40769fe JD |
964 | /* Sets global pdev as a side effect */ |
965 | res = lm78_isa_device_add(isa_address); | |
966 | if (res) | |
967 | goto exit_unreg_isa_driver; | |
968 | } | |
fde09509 JD |
969 | |
970 | return 0; | |
c40769fe JD |
971 | |
972 | exit_unreg_isa_driver: | |
973 | platform_driver_unregister(&lm78_isa_driver); | |
974 | exit_unreg_i2c_driver: | |
975 | i2c_del_driver(&lm78_driver); | |
976 | exit: | |
977 | return res; | |
1da177e4 LT |
978 | } |
979 | ||
980 | static void __exit sm_lm78_exit(void) | |
981 | { | |
c40769fe JD |
982 | if (pdev) { |
983 | platform_device_unregister(pdev); | |
984 | platform_driver_unregister(&lm78_isa_driver); | |
985 | } | |
1da177e4 LT |
986 | i2c_del_driver(&lm78_driver); |
987 | } | |
988 | ||
989 | ||
990 | ||
991 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>"); | |
27fe048e | 992 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
993 | MODULE_LICENSE("GPL"); |
994 | ||
995 | module_init(sm_lm78_init); | |
996 | module_exit(sm_lm78_exit); |