Commit | Line | Data |
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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
9b03079f GR |
3 | * lm78.c - Part of lm_sensors, Linux kernel modules for hardware |
4 | * monitoring | |
5 | * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
7c81c60f | 6 | * Copyright (c) 2007, 2011 Jean Delvare <jdelvare@suse.de> |
9b03079f | 7 | */ |
1da177e4 | 8 | |
ce47da74 JP |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
10 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/jiffies.h> | |
15 | #include <linux/i2c.h> | |
943b0830 | 16 | #include <linux/hwmon.h> |
19f673ed | 17 | #include <linux/hwmon-vid.h> |
247dde4c | 18 | #include <linux/hwmon-sysfs.h> |
943b0830 | 19 | #include <linux/err.h> |
9a61bf63 | 20 | #include <linux/mutex.h> |
1da177e4 | 21 | |
90534c5c JD |
22 | #ifdef CONFIG_ISA |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/ioport.h> | |
25 | #include <linux/io.h> | |
26 | #endif | |
c40769fe | 27 | |
1da177e4 | 28 | /* Addresses to scan */ |
25e9c86d MH |
29 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
30 | 0x2e, 0x2f, I2C_CLIENT_END }; | |
e5e9f44c | 31 | enum chips { lm78, lm79 }; |
1da177e4 LT |
32 | |
33 | /* Many LM78 constants specified below */ | |
34 | ||
35 | /* Length of ISA address segment */ | |
36 | #define LM78_EXTENT 8 | |
37 | ||
38 | /* Where are the ISA address/data registers relative to the base address */ | |
39 | #define LM78_ADDR_REG_OFFSET 5 | |
40 | #define LM78_DATA_REG_OFFSET 6 | |
41 | ||
42 | /* The LM78 registers */ | |
43 | #define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
44 | #define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
45 | #define LM78_REG_IN(nr) (0x20 + (nr)) | |
46 | ||
47 | #define LM78_REG_FAN_MIN(nr) (0x3b + (nr)) | |
48 | #define LM78_REG_FAN(nr) (0x28 + (nr)) | |
49 | ||
50 | #define LM78_REG_TEMP 0x27 | |
51 | #define LM78_REG_TEMP_OVER 0x39 | |
52 | #define LM78_REG_TEMP_HYST 0x3a | |
53 | ||
54 | #define LM78_REG_ALARM1 0x41 | |
55 | #define LM78_REG_ALARM2 0x42 | |
56 | ||
57 | #define LM78_REG_VID_FANDIV 0x47 | |
58 | ||
59 | #define LM78_REG_CONFIG 0x40 | |
60 | #define LM78_REG_CHIPID 0x49 | |
61 | #define LM78_REG_I2C_ADDR 0x48 | |
62 | ||
9b03079f GR |
63 | /* |
64 | * Conversions. Rounding and limit checking is only done on the TO_REG | |
65 | * variants. | |
66 | */ | |
1da177e4 | 67 | |
9b03079f GR |
68 | /* |
69 | * IN: mV (0V to 4.08V) | |
70 | * REG: 16mV/bit | |
71 | */ | |
1da177e4 LT |
72 | static inline u8 IN_TO_REG(unsigned long val) |
73 | { | |
2a844c14 | 74 | unsigned long nval = clamp_val(val, 0, 4080); |
1da177e4 LT |
75 | return (nval + 8) / 16; |
76 | } | |
77 | #define IN_FROM_REG(val) ((val) * 16) | |
78 | ||
79 | static inline u8 FAN_TO_REG(long rpm, int div) | |
80 | { | |
81 | if (rpm <= 0) | |
82 | return 255; | |
3806b45b DC |
83 | if (rpm > 1350000) |
84 | return 1; | |
2a844c14 | 85 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); |
1da177e4 LT |
86 | } |
87 | ||
88 | static inline int FAN_FROM_REG(u8 val, int div) | |
89 | { | |
9b03079f | 90 | return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); |
1da177e4 LT |
91 | } |
92 | ||
9b03079f GR |
93 | /* |
94 | * TEMP: mC (-128C to +127C) | |
95 | * REG: 1C/bit, two's complement | |
96 | */ | |
1074d683 | 97 | static inline s8 TEMP_TO_REG(long val) |
1da177e4 | 98 | { |
2a844c14 | 99 | int nval = clamp_val(val, -128000, 127000) ; |
9b03079f | 100 | return nval < 0 ? (nval - 500) / 1000 : (nval + 500) / 1000; |
1da177e4 LT |
101 | } |
102 | ||
103 | static inline int TEMP_FROM_REG(s8 val) | |
104 | { | |
105 | return val * 1000; | |
106 | } | |
107 | ||
1da177e4 LT |
108 | #define DIV_FROM_REG(val) (1 << (val)) |
109 | ||
1da177e4 | 110 | struct lm78_data { |
0c6e9731 | 111 | struct i2c_client *client; |
9a61bf63 | 112 | struct mutex lock; |
1da177e4 LT |
113 | enum chips type; |
114 | ||
6e1b5029 JD |
115 | /* For ISA device only */ |
116 | const char *name; | |
117 | int isa_addr; | |
118 | ||
9a61bf63 | 119 | struct mutex update_lock; |
1da177e4 LT |
120 | char valid; /* !=0 if following fields are valid */ |
121 | unsigned long last_updated; /* In jiffies */ | |
122 | ||
123 | u8 in[7]; /* Register value */ | |
124 | u8 in_max[7]; /* Register value */ | |
125 | u8 in_min[7]; /* Register value */ | |
126 | u8 fan[3]; /* Register value */ | |
127 | u8 fan_min[3]; /* Register value */ | |
128 | s8 temp; /* Register value */ | |
129 | s8 temp_over; /* Register value */ | |
130 | s8 temp_hyst; /* Register value */ | |
131 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
132 | u8 vid; /* Register encoding, combined */ | |
133 | u16 alarms; /* Register encoding, combined */ | |
134 | }; | |
135 | ||
c59cc301 JD |
136 | static int lm78_read_value(struct lm78_data *data, u8 reg); |
137 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value); | |
1da177e4 | 138 | static struct lm78_data *lm78_update_device(struct device *dev); |
c59cc301 | 139 | static void lm78_init_device(struct lm78_data *data); |
1da177e4 | 140 | |
1da177e4 | 141 | /* 7 Voltages */ |
e7655cfd | 142 | static ssize_t in_show(struct device *dev, struct device_attribute *da, |
247dde4c | 143 | char *buf) |
1da177e4 | 144 | { |
247dde4c | 145 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 146 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 147 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index])); |
1da177e4 LT |
148 | } |
149 | ||
e7655cfd | 150 | static ssize_t in_min_show(struct device *dev, struct device_attribute *da, |
247dde4c | 151 | char *buf) |
1da177e4 | 152 | { |
247dde4c | 153 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 154 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 155 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index])); |
1da177e4 LT |
156 | } |
157 | ||
e7655cfd | 158 | static ssize_t in_max_show(struct device *dev, struct device_attribute *da, |
247dde4c | 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_max[attr->index])); |
1da177e4 LT |
164 | } |
165 | ||
e7655cfd GR |
166 | static ssize_t in_min_store(struct device *dev, struct device_attribute *da, |
167 | const char *buf, size_t count) | |
1da177e4 | 168 | { |
247dde4c | 169 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 170 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 171 | int nr = attr->index; |
9b03079f GR |
172 | unsigned long val; |
173 | int err; | |
174 | ||
175 | err = kstrtoul(buf, 10, &val); | |
176 | if (err) | |
177 | return err; | |
1da177e4 | 178 | |
9a61bf63 | 179 | mutex_lock(&data->update_lock); |
1da177e4 | 180 | data->in_min[nr] = IN_TO_REG(val); |
c59cc301 | 181 | lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]); |
9a61bf63 | 182 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
183 | return count; |
184 | } | |
185 | ||
e7655cfd GR |
186 | static ssize_t in_max_store(struct device *dev, struct device_attribute *da, |
187 | const char *buf, size_t count) | |
1da177e4 | 188 | { |
247dde4c | 189 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 190 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 191 | int nr = attr->index; |
9b03079f GR |
192 | unsigned long val; |
193 | int err; | |
194 | ||
195 | err = kstrtoul(buf, 10, &val); | |
196 | if (err) | |
197 | return err; | |
1da177e4 | 198 | |
9a61bf63 | 199 | mutex_lock(&data->update_lock); |
1da177e4 | 200 | data->in_max[nr] = IN_TO_REG(val); |
c59cc301 | 201 | lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]); |
9a61bf63 | 202 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
203 | return count; |
204 | } | |
9b03079f | 205 | |
e7655cfd GR |
206 | static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); |
207 | static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); | |
208 | static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); | |
209 | static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); | |
210 | static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); | |
211 | static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); | |
212 | static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); | |
213 | static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); | |
214 | static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); | |
215 | static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); | |
216 | static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); | |
217 | static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); | |
218 | static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); | |
219 | static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); | |
220 | static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); | |
221 | static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); | |
222 | static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); | |
223 | static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); | |
224 | static SENSOR_DEVICE_ATTR_RO(in6_input, in, 6); | |
225 | static SENSOR_DEVICE_ATTR_RW(in6_min, in_min, 6); | |
226 | static SENSOR_DEVICE_ATTR_RW(in6_max, in_max, 6); | |
1da177e4 LT |
227 | |
228 | /* Temperature */ | |
eabb6f15 JL |
229 | static ssize_t temp1_input_show(struct device *dev, |
230 | struct device_attribute *da, char *buf) | |
1da177e4 LT |
231 | { |
232 | struct lm78_data *data = lm78_update_device(dev); | |
233 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); | |
234 | } | |
235 | ||
eabb6f15 | 236 | static ssize_t temp1_max_show(struct device *dev, struct device_attribute *da, |
247dde4c | 237 | char *buf) |
1da177e4 LT |
238 | { |
239 | struct lm78_data *data = lm78_update_device(dev); | |
240 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); | |
241 | } | |
242 | ||
eabb6f15 JL |
243 | static ssize_t temp1_max_store(struct device *dev, |
244 | struct device_attribute *da, const char *buf, | |
245 | size_t count) | |
1da177e4 | 246 | { |
c40769fe | 247 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
248 | long val; |
249 | int err; | |
250 | ||
251 | err = kstrtol(buf, 10, &val); | |
252 | if (err) | |
253 | return err; | |
1da177e4 | 254 | |
9a61bf63 | 255 | mutex_lock(&data->update_lock); |
1da177e4 | 256 | data->temp_over = TEMP_TO_REG(val); |
c59cc301 | 257 | lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over); |
9a61bf63 | 258 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
259 | return count; |
260 | } | |
261 | ||
eabb6f15 JL |
262 | static ssize_t temp1_max_hyst_show(struct device *dev, |
263 | struct device_attribute *da, char *buf) | |
1da177e4 LT |
264 | { |
265 | struct lm78_data *data = lm78_update_device(dev); | |
266 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); | |
267 | } | |
268 | ||
eabb6f15 JL |
269 | static ssize_t temp1_max_hyst_store(struct device *dev, |
270 | struct device_attribute *da, | |
271 | const char *buf, size_t count) | |
1da177e4 | 272 | { |
c40769fe | 273 | struct lm78_data *data = dev_get_drvdata(dev); |
9b03079f GR |
274 | long val; |
275 | int err; | |
276 | ||
277 | err = kstrtol(buf, 10, &val); | |
278 | if (err) | |
279 | return err; | |
1da177e4 | 280 | |
9a61bf63 | 281 | mutex_lock(&data->update_lock); |
1da177e4 | 282 | data->temp_hyst = TEMP_TO_REG(val); |
c59cc301 | 283 | lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst); |
9a61bf63 | 284 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
285 | return count; |
286 | } | |
287 | ||
eabb6f15 JL |
288 | static DEVICE_ATTR_RO(temp1_input); |
289 | static DEVICE_ATTR_RW(temp1_max); | |
290 | static DEVICE_ATTR_RW(temp1_max_hyst); | |
1da177e4 LT |
291 | |
292 | /* 3 Fans */ | |
e7655cfd | 293 | static ssize_t fan_show(struct device *dev, struct device_attribute *da, |
247dde4c | 294 | char *buf) |
1da177e4 | 295 | { |
247dde4c | 296 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 297 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 298 | int nr = attr->index; |
1da177e4 | 299 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
9b03079f | 300 | DIV_FROM_REG(data->fan_div[nr]))); |
1da177e4 LT |
301 | } |
302 | ||
e7655cfd | 303 | static ssize_t fan_min_show(struct device *dev, struct device_attribute *da, |
247dde4c | 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; |
9b03079f GR |
309 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], |
310 | DIV_FROM_REG(data->fan_div[nr]))); | |
1da177e4 LT |
311 | } |
312 | ||
e7655cfd GR |
313 | static ssize_t fan_min_store(struct device *dev, struct device_attribute *da, |
314 | const char *buf, size_t count) | |
1da177e4 | 315 | { |
247dde4c | 316 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 317 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 318 | int nr = attr->index; |
9b03079f GR |
319 | unsigned long val; |
320 | int err; | |
321 | ||
322 | err = kstrtoul(buf, 10, &val); | |
323 | if (err) | |
324 | return err; | |
1da177e4 | 325 | |
9a61bf63 | 326 | mutex_lock(&data->update_lock); |
1da177e4 | 327 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
c59cc301 | 328 | lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]); |
9a61bf63 | 329 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
330 | return count; |
331 | } | |
332 | ||
e7655cfd | 333 | static ssize_t fan_div_show(struct device *dev, struct device_attribute *da, |
247dde4c | 334 | char *buf) |
1da177e4 | 335 | { |
247dde4c | 336 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
1da177e4 | 337 | struct lm78_data *data = lm78_update_device(dev); |
247dde4c | 338 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
339 | } |
340 | ||
9b03079f GR |
341 | /* |
342 | * Note: we save and restore the fan minimum here, because its value is | |
343 | * determined in part by the fan divisor. This follows the principle of | |
344 | * least surprise; the user doesn't expect the fan minimum to change just | |
345 | * because the divisor changed. | |
346 | */ | |
e7655cfd GR |
347 | static ssize_t fan_div_store(struct device *dev, struct device_attribute *da, |
348 | const char *buf, size_t count) | |
1da177e4 | 349 | { |
247dde4c | 350 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
c40769fe | 351 | struct lm78_data *data = dev_get_drvdata(dev); |
247dde4c | 352 | int nr = attr->index; |
1da177e4 LT |
353 | unsigned long min; |
354 | u8 reg; | |
9b03079f GR |
355 | unsigned long val; |
356 | int err; | |
357 | ||
358 | err = kstrtoul(buf, 10, &val); | |
359 | if (err) | |
360 | return err; | |
1da177e4 | 361 | |
9a61bf63 | 362 | mutex_lock(&data->update_lock); |
1da177e4 LT |
363 | min = FAN_FROM_REG(data->fan_min[nr], |
364 | DIV_FROM_REG(data->fan_div[nr])); | |
365 | ||
366 | switch (val) { | |
9b03079f GR |
367 | case 1: |
368 | data->fan_div[nr] = 0; | |
369 | break; | |
370 | case 2: | |
371 | data->fan_div[nr] = 1; | |
372 | break; | |
373 | case 4: | |
374 | data->fan_div[nr] = 2; | |
375 | break; | |
376 | case 8: | |
377 | data->fan_div[nr] = 3; | |
378 | break; | |
1da177e4 | 379 | default: |
b55f3757 GR |
380 | dev_err(dev, |
381 | "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", | |
382 | 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 | ||
e7655cfd GR |
406 | static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); |
407 | static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); | |
408 | static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); | |
409 | static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); | |
410 | static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2); | |
411 | static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2); | |
1da177e4 LT |
412 | |
413 | /* Fan 3 divisor is locked in H/W */ | |
e7655cfd GR |
414 | static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); |
415 | static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); | |
416 | static SENSOR_DEVICE_ATTR_RO(fan3_div, fan_div, 2); | |
1da177e4 LT |
417 | |
418 | /* VID */ | |
eabb6f15 JL |
419 | static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *da, |
420 | char *buf) | |
1da177e4 LT |
421 | { |
422 | struct lm78_data *data = lm78_update_device(dev); | |
d0d3cd69 | 423 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82)); |
1da177e4 | 424 | } |
eabb6f15 | 425 | static DEVICE_ATTR_RO(cpu0_vid); |
1da177e4 LT |
426 | |
427 | /* Alarms */ | |
eabb6f15 | 428 | static ssize_t alarms_show(struct device *dev, struct device_attribute *da, |
247dde4c | 429 | char *buf) |
1da177e4 LT |
430 | { |
431 | struct lm78_data *data = lm78_update_device(dev); | |
432 | return sprintf(buf, "%u\n", data->alarms); | |
433 | } | |
eabb6f15 | 434 | static DEVICE_ATTR_RO(alarms); |
1da177e4 | 435 | |
e7655cfd | 436 | static ssize_t alarm_show(struct device *dev, struct device_attribute *da, |
428a7039 JD |
437 | char *buf) |
438 | { | |
439 | struct lm78_data *data = lm78_update_device(dev); | |
440 | int nr = to_sensor_dev_attr(da)->index; | |
441 | return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); | |
442 | } | |
e7655cfd GR |
443 | static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); |
444 | static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); | |
445 | static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); | |
446 | static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); | |
447 | static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); | |
448 | static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9); | |
449 | static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 10); | |
450 | static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); | |
451 | static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); | |
452 | static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, 11); | |
453 | static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); | |
428a7039 | 454 | |
8eb40610 | 455 | static struct attribute *lm78_attrs[] = { |
247dde4c JD |
456 | &sensor_dev_attr_in0_input.dev_attr.attr, |
457 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
458 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
428a7039 | 459 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
247dde4c JD |
460 | &sensor_dev_attr_in1_input.dev_attr.attr, |
461 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
462 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
428a7039 | 463 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
247dde4c JD |
464 | &sensor_dev_attr_in2_input.dev_attr.attr, |
465 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
466 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
428a7039 | 467 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
247dde4c JD |
468 | &sensor_dev_attr_in3_input.dev_attr.attr, |
469 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
470 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
428a7039 | 471 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
247dde4c JD |
472 | &sensor_dev_attr_in4_input.dev_attr.attr, |
473 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
474 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
428a7039 | 475 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
247dde4c JD |
476 | &sensor_dev_attr_in5_input.dev_attr.attr, |
477 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
478 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
428a7039 | 479 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
247dde4c JD |
480 | &sensor_dev_attr_in6_input.dev_attr.attr, |
481 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
482 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
428a7039 | 483 | &sensor_dev_attr_in6_alarm.dev_attr.attr, |
c1685f61 MH |
484 | &dev_attr_temp1_input.attr, |
485 | &dev_attr_temp1_max.attr, | |
486 | &dev_attr_temp1_max_hyst.attr, | |
428a7039 | 487 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
247dde4c JD |
488 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
489 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
490 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
428a7039 | 491 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
247dde4c JD |
492 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
493 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
494 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
428a7039 | 495 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
247dde4c JD |
496 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
497 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
498 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
428a7039 | 499 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
c1685f61 MH |
500 | &dev_attr_alarms.attr, |
501 | &dev_attr_cpu0_vid.attr, | |
502 | ||
503 | NULL | |
504 | }; | |
505 | ||
8eb40610 | 506 | ATTRIBUTE_GROUPS(lm78); |
c1685f61 | 507 | |
90534c5c JD |
508 | /* |
509 | * ISA related code | |
510 | */ | |
511 | #ifdef CONFIG_ISA | |
512 | ||
513 | /* ISA device, if found */ | |
514 | static struct platform_device *pdev; | |
515 | ||
516 | static unsigned short isa_address = 0x290; | |
517 | ||
90534c5c JD |
518 | static struct lm78_data *lm78_data_if_isa(void) |
519 | { | |
520 | return pdev ? platform_get_drvdata(pdev) : NULL; | |
521 | } | |
522 | ||
18c73f90 JD |
523 | /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ |
524 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
525 | { | |
0c6e9731 | 526 | struct lm78_data *isa; |
18c73f90 JD |
527 | int i; |
528 | ||
529 | if (!pdev) /* No ISA chip */ | |
530 | return 0; | |
18c73f90 JD |
531 | isa = platform_get_drvdata(pdev); |
532 | ||
533 | if (lm78_read_value(isa, LM78_REG_I2C_ADDR) != client->addr) | |
534 | return 0; /* Address doesn't match */ | |
535 | if ((lm78_read_value(isa, LM78_REG_CHIPID) & 0xfe) != (chipid & 0xfe)) | |
536 | return 0; /* Chip type doesn't match */ | |
537 | ||
9b03079f GR |
538 | /* |
539 | * We compare all the limit registers, the config register and the | |
540 | * interrupt mask registers | |
541 | */ | |
18c73f90 | 542 | for (i = 0x2b; i <= 0x3d; i++) { |
0c6e9731 JD |
543 | if (lm78_read_value(isa, i) != |
544 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
545 | return 0; |
546 | } | |
547 | if (lm78_read_value(isa, LM78_REG_CONFIG) != | |
0c6e9731 | 548 | i2c_smbus_read_byte_data(client, LM78_REG_CONFIG)) |
18c73f90 JD |
549 | return 0; |
550 | for (i = 0x43; i <= 0x46; i++) { | |
0c6e9731 JD |
551 | if (lm78_read_value(isa, i) != |
552 | i2c_smbus_read_byte_data(client, i)) | |
18c73f90 JD |
553 | return 0; |
554 | } | |
555 | ||
556 | return 1; | |
557 | } | |
90534c5c JD |
558 | #else /* !CONFIG_ISA */ |
559 | ||
560 | static int lm78_alias_detect(struct i2c_client *client, u8 chipid) | |
561 | { | |
562 | return 0; | |
563 | } | |
564 | ||
565 | static struct lm78_data *lm78_data_if_isa(void) | |
566 | { | |
567 | return NULL; | |
568 | } | |
569 | #endif /* CONFIG_ISA */ | |
18c73f90 | 570 | |
310ec792 | 571 | static int lm78_i2c_detect(struct i2c_client *client, |
0c6e9731 | 572 | struct i2c_board_info *info) |
1da177e4 | 573 | { |
0c6e9731 | 574 | int i; |
90534c5c | 575 | struct lm78_data *isa = lm78_data_if_isa(); |
0c6e9731 JD |
576 | const char *client_name; |
577 | struct i2c_adapter *adapter = client->adapter; | |
578 | int address = client->addr; | |
1da177e4 | 579 | |
0c6e9731 JD |
580 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
581 | return -ENODEV; | |
1da177e4 | 582 | |
9b03079f GR |
583 | /* |
584 | * We block updates of the ISA device to minimize the risk of | |
585 | * concurrent access to the same LM78 chip through different | |
586 | * interfaces. | |
587 | */ | |
0c6e9731 JD |
588 | if (isa) |
589 | mutex_lock(&isa->update_lock); | |
1da177e4 | 590 | |
52df6440 JD |
591 | if ((i2c_smbus_read_byte_data(client, LM78_REG_CONFIG) & 0x80) |
592 | || i2c_smbus_read_byte_data(client, LM78_REG_I2C_ADDR) != address) | |
593 | goto err_nodev; | |
594 | ||
595 | /* Explicitly prevent the misdetection of Winbond chips */ | |
596 | i = i2c_smbus_read_byte_data(client, 0x4f); | |
597 | if (i == 0xa3 || i == 0x5c) | |
598 | goto err_nodev; | |
1da177e4 LT |
599 | |
600 | /* Determine the chip type. */ | |
52df6440 JD |
601 | i = i2c_smbus_read_byte_data(client, LM78_REG_CHIPID); |
602 | if (i == 0x00 || i == 0x20 /* LM78 */ | |
603 | || i == 0x40) /* LM78-J */ | |
604 | client_name = "lm78"; | |
605 | else if ((i & 0xfe) == 0xc0) | |
606 | client_name = "lm79"; | |
607 | else | |
608 | goto err_nodev; | |
609 | ||
610 | if (lm78_alias_detect(client, i)) { | |
b55f3757 GR |
611 | dev_dbg(&adapter->dev, |
612 | "Device at 0x%02x appears to be the same as ISA device\n", | |
613 | address); | |
52df6440 | 614 | goto err_nodev; |
1da177e4 LT |
615 | } |
616 | ||
0c6e9731 JD |
617 | if (isa) |
618 | mutex_unlock(&isa->update_lock); | |
619 | ||
0c6e9731 | 620 | strlcpy(info->type, client_name, I2C_NAME_SIZE); |
1da177e4 | 621 | |
0c6e9731 | 622 | return 0; |
1da177e4 | 623 | |
0c6e9731 JD |
624 | err_nodev: |
625 | if (isa) | |
626 | mutex_unlock(&isa->update_lock); | |
627 | return -ENODEV; | |
628 | } | |
629 | ||
630 | static int lm78_i2c_probe(struct i2c_client *client, | |
631 | const struct i2c_device_id *id) | |
632 | { | |
8eb40610 AL |
633 | struct device *dev = &client->dev; |
634 | struct device *hwmon_dev; | |
0c6e9731 | 635 | struct lm78_data *data; |
0c6e9731 | 636 | |
8eb40610 | 637 | data = devm_kzalloc(dev, sizeof(struct lm78_data), GFP_KERNEL); |
0c6e9731 JD |
638 | if (!data) |
639 | return -ENOMEM; | |
640 | ||
0c6e9731 JD |
641 | data->client = client; |
642 | data->type = id->driver_data; | |
1da177e4 LT |
643 | |
644 | /* Initialize the LM78 chip */ | |
c59cc301 | 645 | lm78_init_device(data); |
1da177e4 | 646 | |
8eb40610 AL |
647 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
648 | data, lm78_groups); | |
649 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
c40769fe JD |
650 | } |
651 | ||
ed4cebdf JD |
652 | static const struct i2c_device_id lm78_i2c_id[] = { |
653 | { "lm78", lm78 }, | |
654 | { "lm79", lm79 }, | |
655 | { } | |
656 | }; | |
657 | MODULE_DEVICE_TABLE(i2c, lm78_i2c_id); | |
6e1b5029 | 658 | |
ed4cebdf JD |
659 | static struct i2c_driver lm78_driver = { |
660 | .class = I2C_CLASS_HWMON, | |
661 | .driver = { | |
662 | .name = "lm78", | |
663 | }, | |
664 | .probe = lm78_i2c_probe, | |
ed4cebdf JD |
665 | .id_table = lm78_i2c_id, |
666 | .detect = lm78_i2c_detect, | |
667 | .address_list = normal_i2c, | |
668 | }; | |
1da177e4 | 669 | |
9b03079f GR |
670 | /* |
671 | * The SMBus locks itself, but ISA access must be locked explicitly! | |
672 | * We don't want to lock the whole ISA bus, so we lock each client | |
673 | * separately. | |
674 | * We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks, | |
675 | * would slow down the LM78 access and should not be necessary. | |
676 | */ | |
c59cc301 | 677 | static int lm78_read_value(struct lm78_data *data, u8 reg) |
1da177e4 | 678 | { |
0c6e9731 | 679 | struct i2c_client *client = data->client; |
c59cc301 | 680 | |
90534c5c | 681 | #ifdef CONFIG_ISA |
0c6e9731 | 682 | if (!client) { /* ISA device */ |
c59cc301 | 683 | int res; |
9a61bf63 | 684 | mutex_lock(&data->lock); |
6e1b5029 JD |
685 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
686 | res = inb_p(data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 687 | mutex_unlock(&data->lock); |
1da177e4 LT |
688 | return res; |
689 | } else | |
90534c5c | 690 | #endif |
1da177e4 LT |
691 | return i2c_smbus_read_byte_data(client, reg); |
692 | } | |
693 | ||
c59cc301 | 694 | static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value) |
1da177e4 | 695 | { |
0c6e9731 | 696 | struct i2c_client *client = data->client; |
c59cc301 | 697 | |
90534c5c | 698 | #ifdef CONFIG_ISA |
0c6e9731 | 699 | if (!client) { /* ISA device */ |
9a61bf63 | 700 | mutex_lock(&data->lock); |
6e1b5029 JD |
701 | outb_p(reg, data->isa_addr + LM78_ADDR_REG_OFFSET); |
702 | outb_p(value, data->isa_addr + LM78_DATA_REG_OFFSET); | |
9a61bf63 | 703 | mutex_unlock(&data->lock); |
1da177e4 LT |
704 | return 0; |
705 | } else | |
90534c5c | 706 | #endif |
1da177e4 LT |
707 | return i2c_smbus_write_byte_data(client, reg, value); |
708 | } | |
709 | ||
c59cc301 | 710 | static void lm78_init_device(struct lm78_data *data) |
1da177e4 | 711 | { |
c40769fe JD |
712 | u8 config; |
713 | int i; | |
1da177e4 LT |
714 | |
715 | /* Start monitoring */ | |
c59cc301 | 716 | config = lm78_read_value(data, LM78_REG_CONFIG); |
c40769fe | 717 | if ((config & 0x09) != 0x01) |
c59cc301 | 718 | lm78_write_value(data, LM78_REG_CONFIG, |
1da177e4 | 719 | (config & 0xf7) | 0x01); |
c40769fe JD |
720 | |
721 | /* A few vars need to be filled upon startup */ | |
722 | for (i = 0; i < 3; i++) { | |
c59cc301 | 723 | data->fan_min[i] = lm78_read_value(data, |
c40769fe JD |
724 | LM78_REG_FAN_MIN(i)); |
725 | } | |
726 | ||
727 | mutex_init(&data->update_lock); | |
1da177e4 LT |
728 | } |
729 | ||
730 | static struct lm78_data *lm78_update_device(struct device *dev) | |
731 | { | |
c40769fe | 732 | struct lm78_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
733 | int i; |
734 | ||
9a61bf63 | 735 | mutex_lock(&data->update_lock); |
1da177e4 LT |
736 | |
737 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
738 | || !data->valid) { | |
739 | ||
c40769fe | 740 | dev_dbg(dev, "Starting lm78 update\n"); |
1da177e4 LT |
741 | |
742 | for (i = 0; i <= 6; i++) { | |
743 | data->in[i] = | |
c59cc301 | 744 | lm78_read_value(data, LM78_REG_IN(i)); |
1da177e4 | 745 | data->in_min[i] = |
c59cc301 | 746 | lm78_read_value(data, LM78_REG_IN_MIN(i)); |
1da177e4 | 747 | data->in_max[i] = |
c59cc301 | 748 | lm78_read_value(data, LM78_REG_IN_MAX(i)); |
1da177e4 LT |
749 | } |
750 | for (i = 0; i < 3; i++) { | |
751 | data->fan[i] = | |
c59cc301 | 752 | lm78_read_value(data, LM78_REG_FAN(i)); |
1da177e4 | 753 | data->fan_min[i] = |
c59cc301 | 754 | lm78_read_value(data, LM78_REG_FAN_MIN(i)); |
1da177e4 | 755 | } |
c59cc301 | 756 | data->temp = lm78_read_value(data, LM78_REG_TEMP); |
1da177e4 | 757 | data->temp_over = |
c59cc301 | 758 | lm78_read_value(data, LM78_REG_TEMP_OVER); |
1da177e4 | 759 | data->temp_hyst = |
c59cc301 JD |
760 | lm78_read_value(data, LM78_REG_TEMP_HYST); |
761 | i = lm78_read_value(data, LM78_REG_VID_FANDIV); | |
1da177e4 LT |
762 | data->vid = i & 0x0f; |
763 | if (data->type == lm79) | |
764 | data->vid |= | |
c59cc301 | 765 | (lm78_read_value(data, LM78_REG_CHIPID) & |
1da177e4 LT |
766 | 0x01) << 4; |
767 | else | |
768 | data->vid |= 0x10; | |
769 | data->fan_div[0] = (i >> 4) & 0x03; | |
770 | data->fan_div[1] = i >> 6; | |
c59cc301 JD |
771 | data->alarms = lm78_read_value(data, LM78_REG_ALARM1) + |
772 | (lm78_read_value(data, LM78_REG_ALARM2) << 8); | |
1da177e4 LT |
773 | data->last_updated = jiffies; |
774 | data->valid = 1; | |
775 | ||
776 | data->fan_div[2] = 1; | |
777 | } | |
778 | ||
9a61bf63 | 779 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
780 | |
781 | return data; | |
782 | } | |
783 | ||
90534c5c | 784 | #ifdef CONFIG_ISA |
6c931ae1 | 785 | static int lm78_isa_probe(struct platform_device *pdev) |
ed4cebdf | 786 | { |
8eb40610 AL |
787 | struct device *dev = &pdev->dev; |
788 | struct device *hwmon_dev; | |
ed4cebdf JD |
789 | struct lm78_data *data; |
790 | struct resource *res; | |
791 | ||
792 | /* Reserve the ISA region */ | |
793 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
8eb40610 | 794 | if (!devm_request_region(dev, res->start + LM78_ADDR_REG_OFFSET, |
7b7bb90c GR |
795 | 2, "lm78")) |
796 | return -EBUSY; | |
797 | ||
8eb40610 | 798 | data = devm_kzalloc(dev, sizeof(struct lm78_data), GFP_KERNEL); |
7b7bb90c GR |
799 | if (!data) |
800 | return -ENOMEM; | |
ed4cebdf | 801 | |
ed4cebdf JD |
802 | mutex_init(&data->lock); |
803 | data->isa_addr = res->start; | |
804 | platform_set_drvdata(pdev, data); | |
805 | ||
806 | if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) { | |
807 | data->type = lm79; | |
808 | data->name = "lm79"; | |
809 | } else { | |
810 | data->type = lm78; | |
811 | data->name = "lm78"; | |
812 | } | |
813 | ||
814 | /* Initialize the LM78 chip */ | |
815 | lm78_init_device(data); | |
816 | ||
8eb40610 AL |
817 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, data->name, |
818 | data, lm78_groups); | |
819 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
ed4cebdf JD |
820 | } |
821 | ||
822 | static struct platform_driver lm78_isa_driver = { | |
823 | .driver = { | |
ed4cebdf JD |
824 | .name = "lm78", |
825 | }, | |
826 | .probe = lm78_isa_probe, | |
ed4cebdf JD |
827 | }; |
828 | ||
c40769fe JD |
829 | /* return 1 if a supported chip is found, 0 otherwise */ |
830 | static int __init lm78_isa_found(unsigned short address) | |
831 | { | |
832 | int val, save, found = 0; | |
197027e6 JD |
833 | int port; |
834 | ||
9b03079f GR |
835 | /* |
836 | * Some boards declare base+0 to base+7 as a PNP device, some base+4 | |
197027e6 | 837 | * to base+7 and some base+5 to base+6. So we better request each port |
9b03079f GR |
838 | * individually for the probing phase. |
839 | */ | |
197027e6 JD |
840 | for (port = address; port < address + LM78_EXTENT; port++) { |
841 | if (!request_region(port, 1, "lm78")) { | |
ce47da74 | 842 | pr_debug("Failed to request port 0x%x\n", port); |
197027e6 JD |
843 | goto release; |
844 | } | |
47c15532 | 845 | } |
c40769fe JD |
846 | |
847 | #define REALLY_SLOW_IO | |
9b03079f GR |
848 | /* |
849 | * We need the timeouts for at least some LM78-like | |
850 | * chips. But only if we read 'undefined' registers. | |
851 | */ | |
c40769fe JD |
852 | val = inb_p(address + 1); |
853 | if (inb_p(address + 2) != val | |
854 | || inb_p(address + 3) != val | |
855 | || inb_p(address + 7) != val) | |
856 | goto release; | |
857 | #undef REALLY_SLOW_IO | |
858 | ||
9b03079f GR |
859 | /* |
860 | * We should be able to change the 7 LSB of the address port. The | |
861 | * MSB (busy flag) should be clear initially, set after the write. | |
862 | */ | |
c40769fe JD |
863 | save = inb_p(address + LM78_ADDR_REG_OFFSET); |
864 | if (save & 0x80) | |
865 | goto release; | |
866 | val = ~save & 0x7f; | |
867 | outb_p(val, address + LM78_ADDR_REG_OFFSET); | |
868 | if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) { | |
869 | outb_p(save, address + LM78_ADDR_REG_OFFSET); | |
870 | goto release; | |
871 | } | |
872 | ||
873 | /* We found a device, now see if it could be an LM78 */ | |
874 | outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET); | |
875 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
876 | if (val & 0x80) | |
877 | goto release; | |
878 | outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET); | |
879 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
880 | if (val < 0x03 || val > 0x77) /* Not a valid I2C address */ | |
881 | goto release; | |
882 | ||
883 | /* The busy flag should be clear again */ | |
884 | if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80) | |
885 | goto release; | |
886 | ||
887 | /* Explicitly prevent the misdetection of Winbond chips */ | |
888 | outb_p(0x4f, address + LM78_ADDR_REG_OFFSET); | |
889 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
890 | if (val == 0xa3 || val == 0x5c) | |
891 | goto release; | |
892 | ||
893 | /* Explicitly prevent the misdetection of ITE chips */ | |
894 | outb_p(0x58, address + LM78_ADDR_REG_OFFSET); | |
895 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
896 | if (val == 0x90) | |
897 | goto release; | |
898 | ||
899 | /* Determine the chip type */ | |
900 | outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET); | |
901 | val = inb_p(address + LM78_DATA_REG_OFFSET); | |
acf346a3 | 902 | if (val == 0x00 || val == 0x20 /* LM78 */ |
c40769fe JD |
903 | || val == 0x40 /* LM78-J */ |
904 | || (val & 0xfe) == 0xc0) /* LM79 */ | |
905 | found = 1; | |
906 | ||
907 | if (found) | |
ce47da74 | 908 | pr_info("Found an %s chip at %#x\n", |
c40769fe JD |
909 | val & 0x80 ? "LM79" : "LM78", (int)address); |
910 | ||
911 | release: | |
197027e6 JD |
912 | for (port--; port >= address; port--) |
913 | release_region(port, 1); | |
c40769fe JD |
914 | return found; |
915 | } | |
916 | ||
917 | static int __init lm78_isa_device_add(unsigned short address) | |
918 | { | |
919 | struct resource res = { | |
920 | .start = address, | |
15bde2f1 | 921 | .end = address + LM78_EXTENT - 1, |
c40769fe JD |
922 | .name = "lm78", |
923 | .flags = IORESOURCE_IO, | |
924 | }; | |
925 | int err; | |
926 | ||
927 | pdev = platform_device_alloc("lm78", address); | |
928 | if (!pdev) { | |
929 | err = -ENOMEM; | |
ce47da74 | 930 | pr_err("Device allocation failed\n"); |
c40769fe JD |
931 | goto exit; |
932 | } | |
933 | ||
934 | err = platform_device_add_resources(pdev, &res, 1); | |
935 | if (err) { | |
ce47da74 | 936 | pr_err("Device resource addition failed (%d)\n", err); |
c40769fe JD |
937 | goto exit_device_put; |
938 | } | |
939 | ||
940 | err = platform_device_add(pdev); | |
941 | if (err) { | |
ce47da74 | 942 | pr_err("Device addition failed (%d)\n", err); |
c40769fe JD |
943 | goto exit_device_put; |
944 | } | |
945 | ||
946 | return 0; | |
947 | ||
948 | exit_device_put: | |
949 | platform_device_put(pdev); | |
950 | exit: | |
951 | pdev = NULL; | |
952 | return err; | |
953 | } | |
954 | ||
90534c5c | 955 | static int __init lm78_isa_register(void) |
1da177e4 | 956 | { |
fde09509 JD |
957 | int res; |
958 | ||
c40769fe JD |
959 | if (lm78_isa_found(isa_address)) { |
960 | res = platform_driver_register(&lm78_isa_driver); | |
961 | if (res) | |
18c73f90 | 962 | goto exit; |
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); | |
c40769fe JD |
974 | exit: |
975 | return res; | |
1da177e4 LT |
976 | } |
977 | ||
90534c5c | 978 | static void lm78_isa_unregister(void) |
1da177e4 | 979 | { |
c40769fe JD |
980 | if (pdev) { |
981 | platform_device_unregister(pdev); | |
982 | platform_driver_unregister(&lm78_isa_driver); | |
983 | } | |
90534c5c JD |
984 | } |
985 | #else /* !CONFIG_ISA */ | |
986 | ||
987 | static int __init lm78_isa_register(void) | |
988 | { | |
989 | return 0; | |
990 | } | |
991 | ||
992 | static void lm78_isa_unregister(void) | |
993 | { | |
994 | } | |
995 | #endif /* CONFIG_ISA */ | |
996 | ||
997 | static int __init sm_lm78_init(void) | |
998 | { | |
999 | int res; | |
1000 | ||
9b03079f GR |
1001 | /* |
1002 | * We register the ISA device first, so that we can skip the | |
1003 | * registration of an I2C interface to the same device. | |
1004 | */ | |
90534c5c JD |
1005 | res = lm78_isa_register(); |
1006 | if (res) | |
1007 | goto exit; | |
1008 | ||
1009 | res = i2c_add_driver(&lm78_driver); | |
1010 | if (res) | |
1011 | goto exit_unreg_isa_device; | |
1012 | ||
1013 | return 0; | |
1014 | ||
1015 | exit_unreg_isa_device: | |
1016 | lm78_isa_unregister(); | |
1017 | exit: | |
1018 | return res; | |
1019 | } | |
1020 | ||
1021 | static void __exit sm_lm78_exit(void) | |
1022 | { | |
1023 | lm78_isa_unregister(); | |
1da177e4 LT |
1024 | i2c_del_driver(&lm78_driver); |
1025 | } | |
1026 | ||
7c81c60f | 1027 | MODULE_AUTHOR("Frodo Looijaard, Jean Delvare <jdelvare@suse.de>"); |
27fe048e | 1028 | MODULE_DESCRIPTION("LM78/LM79 driver"); |
1da177e4 LT |
1029 | MODULE_LICENSE("GPL"); |
1030 | ||
1031 | module_init(sm_lm78_init); | |
1032 | module_exit(sm_lm78_exit); |