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Commit | Line | Data |
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1da177e4 | 1 | /* |
9b03079f GR |
2 | * lm78.c - Part of lm_sensors, Linux kernel modules for hardware |
3 | * monitoring | |
4 | * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
7c81c60f | 5 | * Copyright (c) 2007, 2011 Jean Delvare <jdelvare@suse.de> |
9b03079f GR |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
1da177e4 | 21 | |
ce47da74 JP |
22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
23 | ||
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/i2c.h> | |
943b0830 | 29 | #include <linux/hwmon.h> |
19f673ed | 30 | #include <linux/hwmon-vid.h> |
247dde4c | 31 | #include <linux/hwmon-sysfs.h> |
943b0830 | 32 | #include <linux/err.h> |
9a61bf63 | 33 | #include <linux/mutex.h> |
1da177e4 | 34 | |
90534c5c JD |
35 | #ifdef CONFIG_ISA |
36 | #include <linux/platform_device.h> | |
37 | #include <linux/ioport.h> | |
38 | #include <linux/io.h> | |
39 | #endif | |
c40769fe | 40 | |
1da177e4 | 41 | /* Addresses to scan */ |
25e9c86d MH |
42 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
43 | 0x2e, 0x2f, I2C_CLIENT_END }; | |
e5e9f44c | 44 | enum chips { lm78, lm79 }; |
1da177e4 LT |
45 | |
46 | /* Many LM78 constants specified below */ | |
47 | ||
48 | /* Length of ISA address segment */ | |
49 | #define LM78_EXTENT 8 | |
50 | ||
51 | /* Where are the ISA address/data registers relative to the base address */ | |
52 | #define LM78_ADDR_REG_OFFSET 5 | |
53 | #define LM78_DATA_REG_OFFSET 6 | |
54 | ||
55 | /* The LM78 registers */ | |
56 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
57 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
58 | #define LM78_REG_IN(nr) (0x20 + (nr)) | |
59 | ||
60 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) | |
61 | #define LM78_REG_FAN(nr) (0x28 + (nr)) | |
62 | ||
63 | #define LM78_REG_TEMP 0x27 | |
64 | #define LM78_REG_TEMP_OVER 0x39 | |
65 | #define LM78_REG_TEMP_HYST 0x3a | |
66 | ||
67 | #define LM78_REG_ALARM1 0x41 | |
68 | #define LM78_REG_ALARM2 0x42 | |
69 | ||
70 | #define LM78_REG_VID_FANDIV 0x47 | |
71 | ||
72 | #define LM78_REG_CONFIG 0x40 | |
73 | #define LM78_REG_CHIPID 0x49 | |
74 | #define LM78_REG_I2C_ADDR 0x48 | |
75 | ||
76 | ||
9b03079f GR |
77 | /* |
78 | * Conversions. Rounding and limit checking is only done on the TO_REG | |
79 | * variants. | |
80 | */ | |
1da177e4 | 81 | |
9b03079f GR |
82 | /* |
83 | * IN: mV (0V to 4.08V) | |
84 | * REG: 16mV/bit | |
85 | */ | |
1da177e4 LT |
86 | static inline u8 IN_TO_REG(unsigned long val) |
87 | { | |
2a844c14 | 88 | unsigned long nval = clamp_val(val, 0, 4080); |
1da177e4 LT |
89 | return (nval + 8) / 16; |
90 | } | |
91 | #define IN_FROM_REG(val) ((val) * 16) | |
92 | ||
93 | static inline u8 FAN_TO_REG(long rpm, int div) | |
94 | { | |
95 | if (rpm <= 0) | |
96 | return 255; | |
3806b45b DC |
97 | if (rpm > 1350000) |
98 | return 1; | |
2a844c14 | 99 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
1da177e4 LT |
100 | } |
101 | ||
102 | static inline int FAN_FROM_REG(u8 val, int div) | |
103 | { | |
9b03079f | 104 | return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); |
1da177e4 LT |
105 | } |
106 | ||
9b03079f GR |
107 | /* |
108 | * TEMP: mC (-128C to +127C) | |
109 | * REG: 1C/bit, two's complement | |
110 | */ | |
1074d683 | 111 | static inline s8 TEMP_TO_REG(long val) |
1da177e4 | 112 | { |
2a844c14 | 113 | int nval = clamp_val(val, -128000, 127000) ; |
9b03079f | 114 | return nval < 0 ? (nval - 500) / 1000 : (nval + 500) / 1000; |
1da177e4 LT |
115 | } |
116 | ||
117 | static inline int TEMP_FROM_REG(s8 val) | |
118 | { | |
119 | return val * 1000; | |
120 | } | |
121 | ||
1da177e4 LT |
122 | #define DIV_FROM_REG(val) (1 << (val)) |
123 | ||
1da177e4 | 124 | struct lm78_data { |
0c6e9731 | 125 | struct i2c_client *client; |
9a61bf63 | 126 | struct mutex lock; |
1da177e4 LT |
127 | enum chips type; |
128 | ||
6e1b5029 JD |
129 | /* For ISA device only */ |
130 | const char *name; | |
131 | int isa_addr; | |
132 | ||
9a61bf63 | 133 | struct mutex update_lock; |
1da177e4 LT |
134 | char valid; /* !=0 if following fields are valid */ |
135 | unsigned long last_updated; /* In jiffies */ | |
136 | ||
137 | u8 in[7]; /* Register value */ | |
138 | u8 in_max[7]; /* Register value */ | |
139 | u8 in_min[7]; /* Register value */ | |
140 | u8 fan[3]; /* Register value */ | |
141 | u8 fan_min[3]; /* Register value */ | |
142 | s8 temp; /* Register value */ | |
143 | s8 temp_over; /* Register value */ | |
144 | s8 temp_hyst; /* Register value */ | |
145 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
146 | u8 vid; /* Register encoding, combined */ | |
147 | u16 alarms; /* Register encoding, combined */ | |
148 | }; | |
149 | ||
150 | ||
c59cc301 JD |
151 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
152 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 153 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 154 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 LT |
155 | |
156 | ||
1da177e4 | 157 | /* 7 Voltages */ |
247dde4c JD |
158 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
159 | char *buf) | |
1da177e4 | 160 | { |
247dde4c | 161 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 162 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 163 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
1da177e4 LT |
164 | } |
165 | ||
247dde4c JD |
166 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
167 | char *buf) | |
1da177e4 | 168 | { |
247dde4c | 169 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 170 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 171 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index])); |
1da177e4 LT |
172 | } |
173 | ||
247dde4c JD |
174 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
175 | char *buf) | |
1da177e4 | 176 | { |
247dde4c | 177 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 178 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 179 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index])); |
1da177e4 LT |
180 | } |
181 | ||
247dde4c JD |
182 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
183 | const char *buf, size_t count) | |
1da177e4 | 184 | { |
247dde4c | 185 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 186 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 187 | int nr = attr->index; |
9b03079f GR |
188 | unsigned long val; |
189 | int err; | |
190 | ||
191 | err = kstrtoul(buf, 10, &val); | |
192 | if (err) | |
193 | return err; | |
1da177e4 | 194 | |
9a61bf63 | 195 | mutex_lock(&data->update_lock); |
1da177e4 | 196 | data->in_min[nr] = IN_TO_REG(val); |
c59cc301 | 197 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
9a61bf63 | 198 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
199 | return count; |
200 | } | |
201 | ||
247dde4c JD |
202 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
203 | const char *buf, size_t count) | |
1da177e4 | 204 | { |
247dde4c | 205 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 206 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 207 | int nr = attr->index; |
9b03079f GR |
208 | unsigned long val; |
209 | int err; | |
210 | ||
211 | err = kstrtoul(buf, 10, &val); | |
212 | if (err) | |
213 | return err; | |
1da177e4 | 214 | |
9a61bf63 | 215 | mutex_lock(&data->update_lock); |
1da177e4 | 216 | data->in_max[nr] = IN_TO_REG(val); |
c59cc301 | 217 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
9a61bf63 | 218 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
219 | return count; |
220 | } | |
9b03079f | 221 | |
1da177e4 | 222 | #define show_in_offset(offset) \ |
247dde4c JD |
223 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
224 | show_in, NULL, offset); \ | |
225 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
226 | show_in_min, set_in_min, offset); \ | |
227 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
228 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
229 | |
230 | show_in_offset(0); | |
231 | show_in_offset(1); | |
232 | show_in_offset(2); | |
233 | show_in_offset(3); | |
234 | show_in_offset(4); | |
235 | show_in_offset(5); | |
236 | show_in_offset(6); | |
237 | ||
238 | /* Temperature */ | |
eabb6f15 JL |
239 | static ssize_t temp1_input_show(struct device *dev, |
240 | struct device_attribute *da, char *buf) | |
1da177e4 LT |
241 | { |
242 | struct lm78_data *data = lm78_update_device(dev); | |
243 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
244 | } | |
245 | ||
eabb6f15 | 246 | static ssize_t temp1_max_show(struct device *dev, struct device_attribute *da, |
247dde4c | 247 | char *buf) |
1da177e4 LT |
248 | { |
249 | struct lm78_data *data = lm78_update_device(dev); | |
250 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
251 | } | |
252 | ||
eabb6f15 JL |
253 | static ssize_t temp1_max_store(struct device *dev, |
254 | struct device_attribute *da, const char *buf, | |
255 | size_t count) | |
1da177e4 | 256 | { |
c40769fe | 257 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
258 | long val; |
259 | int err; | |
260 | ||
261 | err = kstrtol(buf, 10, &val); | |
262 | if (err) | |
263 | return err; | |
1da177e4 | 264 | |
9a61bf63 | 265 | mutex_lock(&data->update_lock); |
1da177e4 | 266 | data->temp_over = TEMP_TO_REG(val); |
c59cc301 | 267 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
9a61bf63 | 268 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
269 | return count; |
270 | } | |
271 | ||
eabb6f15 JL |
272 | static ssize_t temp1_max_hyst_show(struct device *dev, |
273 | struct device_attribute *da, char *buf) | |
1da177e4 LT |
274 | { |
275 | struct lm78_data *data = lm78_update_device(dev); | |
276 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
277 | } | |
278 | ||
eabb6f15 JL |
279 | static ssize_t temp1_max_hyst_store(struct device *dev, |
280 | struct device_attribute *da, | |
281 | const char *buf, size_t count) | |
1da177e4 | 282 | { |
c40769fe | 283 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
284 | long val; |
285 | int err; | |
286 | ||
287 | err = kstrtol(buf, 10, &val); | |
288 | if (err) | |
289 | return err; | |
1da177e4 | 290 | |
9a61bf63 | 291 | mutex_lock(&data->update_lock); |
1da177e4 | 292 | data->temp_hyst = TEMP_TO_REG(val); |
c59cc301 | 293 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
9a61bf63 | 294 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
295 | return count; |
296 | } | |
297 | ||
eabb6f15 JL |
298 | static DEVICE_ATTR_RO(temp1_input); |
299 | static DEVICE_ATTR_RW(temp1_max); | |
300 | static DEVICE_ATTR_RW(temp1_max_hyst); | |
1da177e4 LT |
301 | |
302 | /* 3 Fans */ | |
247dde4c JD |
303 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
304 | char *buf) | |
1da177e4 | 305 | { |
247dde4c | 306 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 307 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 308 | int nr = attr->index; |
1da177e4 | 309 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
9b03079f | 310 | DIV_FROM_REG(data->fan_div[nr]))); |
1da177e4 LT |
311 | } |
312 | ||
247dde4c JD |
313 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
314 | char *buf) | |
1da177e4 | 315 | { |
247dde4c | 316 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 317 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 318 | int nr = attr->index; |
9b03079f GR |
319 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
320 | DIV_FROM_REG(data->fan_div[nr]))); | |
1da177e4 LT |
321 | } |
322 | ||
247dde4c JD |
323 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
324 | const char *buf, size_t count) | |
1da177e4 | 325 | { |
247dde4c | 326 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 327 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 328 | int nr = attr->index; |
9b03079f GR |
329 | unsigned long val; |
330 | int err; | |
331 | ||
332 | err = kstrtoul(buf, 10, &val); | |
333 | if (err) | |
334 | return err; | |
1da177e4 | 335 | |
9a61bf63 | 336 | mutex_lock(&data->update_lock); |
1da177e4 | 337 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
c59cc301 | 338 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 339 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
340 | return count; |
341 | } | |
342 | ||
247dde4c JD |
343 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
344 | char *buf) | |
1da177e4 | 345 | { |
247dde4c | 346 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 347 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 348 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
349 | } |
350 | ||
9b03079f GR |
351 | /* |
352 | * Note: we save and restore the fan minimum here, because its value is | |
353 | * determined in part by the fan divisor. This follows the principle of | |
354 | * least surprise; the user doesn't expect the fan minimum to change just | |
355 | * because the divisor changed. | |
356 | */ | |
247dde4c JD |
357 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
358 | const char *buf, size_t count) | |
1da177e4 | 359 | { |
247dde4c | 360 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 361 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 362 | int nr = attr->index; |
1da177e4 LT |
363 | unsigned long min; |
364 | u8 reg; | |
9b03079f GR |
365 | unsigned long val; |
366 | int err; | |
367 | ||
368 | err = kstrtoul(buf, 10, &val); | |
369 | if (err) | |
370 | return err; | |
1da177e4 | 371 | |
9a61bf63 | 372 | mutex_lock(&data->update_lock); |
1da177e4 LT |
373 | min = FAN_FROM_REG(data->fan_min[nr], |
374 | DIV_FROM_REG(data->fan_div[nr])); | |
375 | ||
376 | switch (val) { | |
9b03079f GR |
377 | case 1: |
378 | data->fan_div[nr] = 0; | |
379 | break; | |
380 | case 2: | |
381 | data->fan_div[nr] = 1; | |
382 | break; | |
383 | case 4: | |
384 | data->fan_div[nr] = 2; | |
385 | break; | |
386 | case 8: | |
387 | data->fan_div[nr] = 3; | |
388 | break; | |
1da177e4 | 389 | default: |
b55f3757 GR |
390 | dev_err(dev, |
391 | "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", | |
392 | val); | |
9a61bf63 | 393 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
394 | return -EINVAL; |
395 | } | |
396 | ||
c59cc301 | 397 | reg = lm78_read_value(data, LM78_REG_VID_FANDIV); |
1da177e4 LT |
398 | switch (nr) { |
399 | case 0: | |
400 | reg = (reg & 0xcf) | (data->fan_div[nr] << 4); | |
401 | break; | |
402 | case 1: | |
403 | reg = (reg & 0x3f) | (data->fan_div[nr] << 6); | |
404 | break; | |
405 | } | |
c59cc301 | 406 | lm78_write_value(data, LM78_REG_VID_FANDIV, reg); |
1da177e4 LT |
407 | |
408 | data->fan_min[nr] = | |
409 | FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
c59cc301 | 410 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 411 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
412 | |
413 | return count; | |
414 | } | |
415 | ||
247dde4c JD |
416 | #define show_fan_offset(offset) \ |
417 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
418 | show_fan, NULL, offset - 1); \ | |
419 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
420 | show_fan_min, set_fan_min, offset - 1); | |
1da177e4 LT |
421 | |
422 | show_fan_offset(1); | |
423 | show_fan_offset(2); | |
424 | show_fan_offset(3); | |
425 | ||
426 | /* Fan 3 divisor is locked in H/W */ | |
247dde4c JD |
427 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
428 | show_fan_div, set_fan_div, 0); | |
429 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, | |
430 | show_fan_div, set_fan_div, 1); | |
431 | static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2); | |
1da177e4 LT |
432 | |
433 | /* VID */ | |
eabb6f15 JL |
434 | static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *da, |
435 | char *buf) | |
1da177e4 LT |
436 | { |
437 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 438 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 | 439 | } |
eabb6f15 | 440 | static DEVICE_ATTR_RO(cpu0_vid); |
1da177e4 LT |
441 | |
442 | /* Alarms */ | |
eabb6f15 | 443 | static ssize_t alarms_show(struct device *dev, struct device_attribute *da, |
247dde4c | 444 | char *buf) |
1da177e4 LT |
445 | { |
446 | struct lm78_data *data = lm78_update_device(dev); | |
447 | return sprintf(buf, "%u\n", data->alarms); | |
448 | } | |
eabb6f15 | 449 | static DEVICE_ATTR_RO(alarms); |
1da177e4 | 450 | |
428a7039 JD |
451 | static ssize_t show_alarm(struct device *dev, struct device_attribute *da, |
452 | char *buf) | |
453 | { | |
454 | struct lm78_data *data = lm78_update_device(dev); | |
455 | int nr = to_sensor_dev_attr(da)->index; | |
456 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
457 | } | |
458 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
459 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
460 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
461 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
462 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
463 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
464 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10); | |
465 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
466 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
467 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11); | |
468 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
469 | ||
8eb40610 | 470 | static struct attribute *lm78_attrs[] = { |
247dde4c JD |
471 | &sensor_dev_attr_in0_input.dev_attr.attr, |
472 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
473 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 474 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
475 | &sensor_dev_attr_in1_input.dev_attr.attr, |
476 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
477 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 478 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
479 | &sensor_dev_attr_in2_input.dev_attr.attr, |
480 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
481 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 482 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
483 | &sensor_dev_attr_in3_input.dev_attr.attr, |
484 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
485 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 486 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
487 | &sensor_dev_attr_in4_input.dev_attr.attr, |
488 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
489 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 490 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
491 | &sensor_dev_attr_in5_input.dev_attr.attr, |
492 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
493 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 494 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
495 | &sensor_dev_attr_in6_input.dev_attr.attr, |
496 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
497 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 498 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
499 | &dev_attr_temp1_input.attr, |
500 | &dev_attr_temp1_max.attr, | |
501 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 502 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
503 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
504 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
505 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 506 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
507 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
508 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
509 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 510 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
511 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
512 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
513 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 514 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
515 | &dev_attr_alarms.attr, |
516 | &dev_attr_cpu0_vid.attr, | |
517 | ||
518 | NULL | |
519 | }; | |
520 | ||
8eb40610 | 521 | ATTRIBUTE_GROUPS(lm78); |
c1685f61 | 522 | |
90534c5c JD |
523 | /* |
524 | * ISA related code | |
525 | */ | |
526 | #ifdef CONFIG_ISA | |
527 | ||
528 | /* ISA device, if found */ | |
529 | static struct platform_device *pdev; | |
530 | ||
531 | static unsigned short isa_address = 0x290; | |
532 | ||
90534c5c JD |
533 | static struct lm78_data *lm78_data_if_isa(void) |
534 | { | |
535 | return pdev ? platform_get_drvdata(pdev) : NULL; | |
536 | } | |
537 | ||
18c73f90 JD |
538 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
539 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
540 | { | |
0c6e9731 | 541 | struct lm78_data *isa; |
18c73f90 JD |
542 | int i; |
543 | ||
544 | if (!pdev) /* No ISA chip */ | |
545 | return 0; | |
18c73f90 JD |
546 | isa = platform_get_drvdata(pdev); |
547 | ||
548 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
549 | return 0; /* Address doesn't match */ | |
550 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
551 | return 0; /* Chip type doesn't match */ | |
552 | ||
9b03079f GR |
553 | /* |
554 | * We compare all the limit registers, the config register and the | |
555 | * interrupt mask registers | |
556 | */ | |
18c73f90 | 557 | for (i = 0x2b; i <= 0x3d; i++) { |
0c6e9731 JD |
558 | if (lm78_read_value(isa, i) != |
559 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
560 | return 0; |
561 | } | |
562 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 563 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
564 | return 0; |
565 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
566 | if (lm78_read_value(isa, i) != |
567 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
568 | return 0; |
569 | } | |
570 | ||
571 | return 1; | |
572 | } | |
90534c5c JD |
573 | #else /* !CONFIG_ISA */ |
574 | ||
575 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
576 | { | |
577 | return 0; | |
578 | } | |
579 | ||
580 | static struct lm78_data *lm78_data_if_isa(void) | |
581 | { | |
582 | return NULL; | |
583 | } | |
584 | #endif /* CONFIG_ISA */ | |
18c73f90 | 585 | |
310ec792 | 586 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 587 | struct i2c_board_info *info) |
1da177e4 | 588 | { |
0c6e9731 | 589 | int i; |
90534c5c | 590 | struct lm78_data *isa = lm78_data_if_isa(); |
0c6e9731 JD |
591 | const char *client_name; |
592 | struct i2c_adapter *adapter = client->adapter; | |
593 | int address = client->addr; | |
1da177e4 | 594 | |
0c6e9731 JD |
595 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
596 | return -ENODEV; | |
1da177e4 | 597 | |
9b03079f GR |
598 | /* |
599 | * We block updates of the ISA device to minimize the risk of | |
600 | * concurrent access to the same LM78 chip through different | |
601 | * interfaces. | |
602 | */ | |
0c6e9731 JD |
603 | if (isa) |
604 | mutex_lock(&isa->update_lock); | |
1da177e4 | 605 | |
52df6440 JD |
606 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
607 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
608 | goto err_nodev; | |
609 | ||
610 | /* Explicitly prevent the misdetection of Winbond chips */ | |
611 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
612 | if (i == 0xa3 || i == 0x5c) | |
613 | goto err_nodev; | |
1da177e4 LT |
614 | |
615 | /* Determine the chip type. */ | |
52df6440 JD |
616 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
617 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
618 | || i == 0x40) /* LM78-J */ | |
619 | client_name = "lm78"; | |
620 | else if ((i & 0xfe) == 0xc0) | |
621 | client_name = "lm79"; | |
622 | else | |
623 | goto err_nodev; | |
624 | ||
625 | if (lm78_alias_detect(client, i)) { | |
b55f3757 GR |
626 | dev_dbg(&adapter->dev, |
627 | "Device at 0x%02x appears to be the same as ISA device\n", | |
628 | address); | |
52df6440 | 629 | goto err_nodev; |
1da177e4 LT |
630 | } |
631 | ||
0c6e9731 JD |
632 | if (isa) |
633 | mutex_unlock(&isa->update_lock); | |
634 | ||
0c6e9731 | 635 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 636 | |
0c6e9731 | 637 | return 0; |
1da177e4 | 638 | |
0c6e9731 JD |
639 | err_nodev: |
640 | if (isa) | |
641 | mutex_unlock(&isa->update_lock); | |
642 | return -ENODEV; | |
643 | } | |
644 | ||
645 | static int lm78_i2c_probe(struct i2c_client *client, | |
646 | const struct i2c_device_id *id) | |
647 | { | |
8eb40610 AL |
648 | struct device *dev = &client->dev; |
649 | struct device *hwmon_dev; | |
0c6e9731 | 650 | struct lm78_data *data; |
0c6e9731 | 651 | |
8eb40610 | 652 | data = devm_kzalloc(dev, sizeof(struct lm78_data), GFP_KERNEL); |
0c6e9731 JD |
653 | if (!data) |
654 | return -ENOMEM; | |
655 | ||
0c6e9731 JD |
656 | data->client = client; |
657 | data->type = id->driver_data; | |
1da177e4 LT |
658 | |
659 | /* Initialize the LM78 chip */ | |
c59cc301 | 660 | lm78_init_device(data); |
1da177e4 | 661 | |
8eb40610 AL |
662 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
663 | data, lm78_groups); | |
664 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
c40769fe JD |
665 | } |
666 | ||
ed4cebdf JD |
667 | static const struct i2c_device_id lm78_i2c_id[] = { |
668 | { "lm78", lm78 }, | |
669 | { "lm79", lm79 }, | |
670 | { } | |
671 | }; | |
672 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
6e1b5029 | 673 | |
ed4cebdf JD |
674 | static struct i2c_driver lm78_driver = { |
675 | .class = I2C_CLASS_HWMON, | |
676 | .driver = { | |
677 | .name = "lm78", | |
678 | }, | |
679 | .probe = lm78_i2c_probe, | |
ed4cebdf JD |
680 | .id_table = lm78_i2c_id, |
681 | .detect = lm78_i2c_detect, | |
682 | .address_list = normal_i2c, | |
683 | }; | |
1da177e4 | 684 | |
9b03079f GR |
685 | /* |
686 | * The SMBus locks itself, but ISA access must be locked explicitly! | |
687 | * We don't want to lock the whole ISA bus, so we lock each client | |
688 | * separately. | |
689 | * We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
690 | * would slow down the LM78 access and should not be necessary. | |
691 | */ | |
c59cc301 | 692 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 693 | { |
0c6e9731 | 694 | struct i2c_client *client = data->client; |
c59cc301 | 695 | |
90534c5c | 696 | #ifdef CONFIG_ISA |
0c6e9731 | 697 | if (!client) { /* ISA device */ |
c59cc301 | 698 | int res; |
9a61bf63 | 699 | mutex_lock(&data->lock); |
6e1b5029 JD |
700 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
701 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 702 | mutex_unlock(&data->lock); |
1da177e4 LT |
703 | return res; |
704 | } else | |
90534c5c | 705 | #endif |
1da177e4 LT |
706 | return i2c_smbus_read_byte_data(client, reg); |
707 | } | |
708 | ||
c59cc301 | 709 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 710 | { |
0c6e9731 | 711 | struct i2c_client *client = data->client; |
c59cc301 | 712 | |
90534c5c | 713 | #ifdef CONFIG_ISA |
0c6e9731 | 714 | if (!client) { /* ISA device */ |
9a61bf63 | 715 | mutex_lock(&data->lock); |
6e1b5029 JD |
716 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
717 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 718 | mutex_unlock(&data->lock); |
1da177e4 LT |
719 | return 0; |
720 | } else | |
90534c5c | 721 | #endif |
1da177e4 LT |
722 | return i2c_smbus_write_byte_data(client, reg, value); |
723 | } | |
724 | ||
c59cc301 | 725 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 726 | { |
c40769fe JD |
727 | u8 config; |
728 | int i; | |
1da177e4 LT |
729 | |
730 | /* Start monitoring */ | |
c59cc301 | 731 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 732 | if ((config & 0x09) != 0x01) |
c59cc301 | 733 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 734 | (config & 0xf7) | 0x01); |
c40769fe JD |
735 | |
736 | /* A few vars need to be filled upon startup */ | |
737 | for (i = 0; i < 3; i++) { | |
c59cc301 | 738 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
739 | LM78_REG_FAN_MIN(i)); |
740 | } | |
741 | ||
742 | mutex_init(&data->update_lock); | |
1da177e4 LT |
743 | } |
744 | ||
745 | static struct lm78_data *lm78_update_device(struct device *dev) | |
746 | { | |
c40769fe | 747 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
748 | int i; |
749 | ||
9a61bf63 | 750 | mutex_lock(&data->update_lock); |
1da177e4 LT |
751 | |
752 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
753 | || !data->valid) { | |
754 | ||
c40769fe | 755 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
756 | |
757 | for (i = 0; i <= 6; i++) { | |
758 | data->in[i] = | |
c59cc301 | 759 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 760 | data->in_min[i] = |
c59cc301 | 761 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 762 | data->in_max[i] = |
c59cc301 | 763 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
764 | } |
765 | for (i = 0; i < 3; i++) { | |
766 | data->fan[i] = | |
c59cc301 | 767 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 768 | data->fan_min[i] = |
c59cc301 | 769 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 770 | } |
c59cc301 | 771 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 772 | data->temp_over = |
c59cc301 | 773 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 774 | data->temp_hyst = |
c59cc301 JD |
775 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
776 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
777 | data->vid = i & 0x0f; |
778 | if (data->type == lm79) | |
779 | data->vid |= | |
c59cc301 | 780 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
781 | 0x01) << 4; |
782 | else | |
783 | data->vid |= 0x10; | |
784 | data->fan_div[0] = (i >> 4) & 0x03; | |
785 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
786 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
787 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
788 | data->last_updated = jiffies; |
789 | data->valid = 1; | |
790 | ||
791 | data->fan_div[2] = 1; | |
792 | } | |
793 | ||
9a61bf63 | 794 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
795 | |
796 | return data; | |
797 | } | |
798 | ||
90534c5c | 799 | #ifdef CONFIG_ISA |
6c931ae1 | 800 | static int lm78_isa_probe(struct platform_device *pdev) |
ed4cebdf | 801 | { |
8eb40610 AL |
802 | struct device *dev = &pdev->dev; |
803 | struct device *hwmon_dev; | |
ed4cebdf JD |
804 | struct lm78_data *data; |
805 | struct resource *res; | |
806 | ||
807 | /* Reserve the ISA region */ | |
808 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
8eb40610 | 809 | if (!devm_request_region(dev, res->start + LM78_ADDR_REG_OFFSET, |
7b7bb90c GR |
810 | 2, "lm78")) |
811 | return -EBUSY; | |
812 | ||
8eb40610 | 813 | data = devm_kzalloc(dev, sizeof(struct lm78_data), GFP_KERNEL); |
7b7bb90c GR |
814 | if (!data) |
815 | return -ENOMEM; | |
ed4cebdf | 816 | |
ed4cebdf JD |
817 | mutex_init(&data->lock); |
818 | data->isa_addr = res->start; | |
819 | platform_set_drvdata(pdev, data); | |
820 | ||
821 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { | |
822 | data->type = lm79; | |
823 | data->name = "lm79"; | |
824 | } else { | |
825 | data->type = lm78; | |
826 | data->name = "lm78"; | |
827 | } | |
828 | ||
829 | /* Initialize the LM78 chip */ | |
830 | lm78_init_device(data); | |
831 | ||
8eb40610 AL |
832 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, data->name, |
833 | data, lm78_groups); | |
834 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
ed4cebdf JD |
835 | } |
836 | ||
837 | static struct platform_driver lm78_isa_driver = { | |
838 | .driver = { | |
ed4cebdf JD |
839 | .name = "lm78", |
840 | }, | |
841 | .probe = lm78_isa_probe, | |
ed4cebdf JD |
842 | }; |
843 | ||
c40769fe JD |
844 | /* return 1 if a supported chip is found, 0 otherwise */ |
845 | static int __init lm78_isa_found(unsigned short address) | |
846 | { | |
847 | int val, save, found = 0; | |
197027e6 JD |
848 | int port; |
849 | ||
9b03079f GR |
850 | /* |
851 | * Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
197027e6 | 852 | * to base+7 and some base+5 to base+6. So we better request each port |
9b03079f GR |
853 | * individually for the probing phase. |
854 | */ | |
197027e6 JD |
855 | for (port = address; port < address + LM78_EXTENT; port++) { |
856 | if (!request_region(port, 1, "lm78")) { | |
ce47da74 | 857 | pr_debug("Failed to request port 0x%x\n", port); |
197027e6 JD |
858 | goto release; |
859 | } | |
47c15532 | 860 | } |
c40769fe JD |
861 | |
862 | #define REALLY_SLOW_IO | |
9b03079f GR |
863 | /* |
864 | * We need the timeouts for at least some LM78-like | |
865 | * chips. But only if we read 'undefined' registers. | |
866 | */ | |
c40769fe JD |
867 | val = inb_p(address + 1); |
868 | if (inb_p(address + 2) != val | |
869 | || inb_p(address + 3) != val | |
870 | || inb_p(address + 7) != val) | |
871 | goto release; | |
872 | #undef REALLY_SLOW_IO | |
873 | ||
9b03079f GR |
874 | /* |
875 | * We should be able to change the 7 LSB of the address port. The | |
876 | * MSB (busy flag) should be clear initially, set after the write. | |
877 | */ | |
c40769fe JD |
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) | |
ce47da74 | 923 | pr_info("Found an %s chip at %#x\n", |
c40769fe JD |
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; | |
ce47da74 | 945 | pr_err("Device allocation failed\n"); |
c40769fe JD |
946 | goto exit; |
947 | } | |
948 | ||
949 | err = platform_device_add_resources(pdev, &res, 1); | |
950 | if (err) { | |
ce47da74 | 951 | pr_err("Device resource addition failed (%d)\n", err); |
c40769fe JD |
952 | goto exit_device_put; |
953 | } | |
954 | ||
955 | err = platform_device_add(pdev); | |
956 | if (err) { | |
ce47da74 | 957 | pr_err("Device addition failed (%d)\n", err); |
c40769fe JD |
958 | goto exit_device_put; |
959 | } | |
960 | ||
961 | return 0; | |
962 | ||
963 | exit_device_put: | |
964 | platform_device_put(pdev); | |
965 | exit: | |
966 | pdev = NULL; | |
967 | return err; | |
968 | } | |
969 | ||
90534c5c | 970 | static int __init lm78_isa_register(void) |
1da177e4 | 971 | { |
fde09509 JD |
972 | int res; |
973 | ||
c40769fe JD |
974 | if (lm78_isa_found(isa_address)) { |
975 | res = platform_driver_register(&lm78_isa_driver); | |
976 | if (res) | |
18c73f90 | 977 | goto exit; |
fde09509 | 978 | |
c40769fe JD |
979 | /* Sets global pdev as a side effect */ |
980 | res = lm78_isa_device_add(isa_address); | |
981 | if (res) | |
982 | goto exit_unreg_isa_driver; | |
983 | } | |
fde09509 JD |
984 | |
985 | return 0; | |
c40769fe JD |
986 | |
987 | exit_unreg_isa_driver: | |
988 | platform_driver_unregister(&lm78_isa_driver); | |
c40769fe JD |
989 | exit: |
990 | return res; | |
1da177e4 LT |
991 | } |
992 | ||
90534c5c | 993 | static void lm78_isa_unregister(void) |
1da177e4 | 994 | { |
c40769fe JD |
995 | if (pdev) { |
996 | platform_device_unregister(pdev); | |
997 | platform_driver_unregister(&lm78_isa_driver); | |
998 | } | |
90534c5c JD |
999 | } |
1000 | #else /* !CONFIG_ISA */ | |
1001 | ||
1002 | static int __init lm78_isa_register(void) | |
1003 | { | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | static void lm78_isa_unregister(void) | |
1008 | { | |
1009 | } | |
1010 | #endif /* CONFIG_ISA */ | |
1011 | ||
1012 | static int __init sm_lm78_init(void) | |
1013 | { | |
1014 | int res; | |
1015 | ||
9b03079f GR |
1016 | /* |
1017 | * We register the ISA device first, so that we can skip the | |
1018 | * registration of an I2C interface to the same device. | |
1019 | */ | |
90534c5c JD |
1020 | res = lm78_isa_register(); |
1021 | if (res) | |
1022 | goto exit; | |
1023 | ||
1024 | res = i2c_add_driver(&lm78_driver); | |
1025 | if (res) | |
1026 | goto exit_unreg_isa_device; | |
1027 | ||
1028 | return 0; | |
1029 | ||
1030 | exit_unreg_isa_device: | |
1031 | lm78_isa_unregister(); | |
1032 | exit: | |
1033 | return res; | |
1034 | } | |
1035 | ||
1036 | static void __exit sm_lm78_exit(void) | |
1037 | { | |
1038 | lm78_isa_unregister(); | |
1da177e4 LT |
1039 | i2c_del_driver(&lm78_driver); |
1040 | } | |
1041 | ||
7c81c60f | 1042 | MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <jdelvare@suse.de>"); |
27fe048e | 1043 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
1044 | MODULE_LICENSE("GPL"); |
1045 | ||
1046 | module_init(sm_lm78_init); | |
1047 | module_exit(sm_lm78_exit); |