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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * lm63.c - driver for the National Semiconductor LM63 temperature sensor | |
3 | * with integrated fan control | |
bc51ae11 | 4 | * Copyright (C) 2004-2005 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
5 | * Based on the lm90 driver. |
6 | * | |
7 | * The LM63 is a sensor chip made by National Semiconductor. It measures | |
8 | * two temperatures (its own and one external one) and the speed of one | |
9 | * fan, those speed it can additionally control. Complete datasheet can be | |
10 | * obtained from National's website at: | |
11 | * http://www.national.com/pf/LM/LM63.html | |
12 | * | |
13 | * The LM63 is basically an LM86 with fan speed monitoring and control | |
14 | * capabilities added. It misses some of the LM86 features though: | |
15 | * - No low limit for local temperature. | |
16 | * - No critical limit for local temperature. | |
17 | * - Critical limit for remote temperature can be changed only once. We | |
18 | * will consider that the critical limit is read-only. | |
19 | * | |
20 | * The datasheet isn't very clear about what the tachometer reading is. | |
21 | * I had a explanation from National Semiconductor though. The two lower | |
22 | * bits of the read value have to be masked out. The value is still 16 bit | |
23 | * in width. | |
24 | * | |
25 | * This program is free software; you can redistribute it and/or modify | |
26 | * it under the terms of the GNU General Public License as published by | |
27 | * the Free Software Foundation; either version 2 of the License, or | |
28 | * (at your option) any later version. | |
29 | * | |
30 | * This program is distributed in the hope that it will be useful, | |
31 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
32 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
33 | * GNU General Public License for more details. | |
34 | * | |
35 | * You should have received a copy of the GNU General Public License | |
36 | * along with this program; if not, write to the Free Software | |
37 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
38 | */ | |
39 | ||
1da177e4 LT |
40 | #include <linux/module.h> |
41 | #include <linux/init.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/jiffies.h> | |
44 | #include <linux/i2c.h> | |
45 | #include <linux/i2c-sensor.h> | |
bc51ae11 | 46 | #include <linux/i2c-sysfs.h> |
1da177e4 LT |
47 | |
48 | /* | |
49 | * Addresses to scan | |
50 | * Address is fully defined internally and cannot be changed. | |
51 | */ | |
52 | ||
53 | static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; | |
54 | static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; | |
55 | ||
56 | /* | |
57 | * Insmod parameters | |
58 | */ | |
59 | ||
60 | SENSORS_INSMOD_1(lm63); | |
61 | ||
62 | /* | |
63 | * The LM63 registers | |
64 | */ | |
65 | ||
66 | #define LM63_REG_CONFIG1 0x03 | |
67 | #define LM63_REG_CONFIG2 0xBF | |
68 | #define LM63_REG_CONFIG_FAN 0x4A | |
69 | ||
70 | #define LM63_REG_TACH_COUNT_MSB 0x47 | |
71 | #define LM63_REG_TACH_COUNT_LSB 0x46 | |
72 | #define LM63_REG_TACH_LIMIT_MSB 0x49 | |
73 | #define LM63_REG_TACH_LIMIT_LSB 0x48 | |
74 | ||
75 | #define LM63_REG_PWM_VALUE 0x4C | |
76 | #define LM63_REG_PWM_FREQ 0x4D | |
77 | ||
78 | #define LM63_REG_LOCAL_TEMP 0x00 | |
79 | #define LM63_REG_LOCAL_HIGH 0x05 | |
80 | ||
81 | #define LM63_REG_REMOTE_TEMP_MSB 0x01 | |
82 | #define LM63_REG_REMOTE_TEMP_LSB 0x10 | |
83 | #define LM63_REG_REMOTE_OFFSET_MSB 0x11 | |
84 | #define LM63_REG_REMOTE_OFFSET_LSB 0x12 | |
85 | #define LM63_REG_REMOTE_HIGH_MSB 0x07 | |
86 | #define LM63_REG_REMOTE_HIGH_LSB 0x13 | |
87 | #define LM63_REG_REMOTE_LOW_MSB 0x08 | |
88 | #define LM63_REG_REMOTE_LOW_LSB 0x14 | |
89 | #define LM63_REG_REMOTE_TCRIT 0x19 | |
90 | #define LM63_REG_REMOTE_TCRIT_HYST 0x21 | |
91 | ||
92 | #define LM63_REG_ALERT_STATUS 0x02 | |
93 | #define LM63_REG_ALERT_MASK 0x16 | |
94 | ||
95 | #define LM63_REG_MAN_ID 0xFE | |
96 | #define LM63_REG_CHIP_ID 0xFF | |
97 | ||
98 | /* | |
99 | * Conversions and various macros | |
100 | * For tachometer counts, the LM63 uses 16-bit values. | |
101 | * For local temperature and high limit, remote critical limit and hysteresis | |
44bbe87e | 102 | * value, it uses signed 8-bit values with LSB = 1 degree Celsius. |
1da177e4 | 103 | * For remote temperature, low and high limits, it uses signed 11-bit values |
44bbe87e | 104 | * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. |
1da177e4 LT |
105 | */ |
106 | ||
107 | #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ | |
108 | 5400000 / (reg)) | |
109 | #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ | |
110 | (5400000 / (val)) & 0xFFFC) | |
111 | #define TEMP8_FROM_REG(reg) ((reg) * 1000) | |
112 | #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \ | |
113 | (val) >= 127000 ? 127 : \ | |
114 | (val) < 0 ? ((val) - 500) / 1000 : \ | |
115 | ((val) + 500) / 1000) | |
116 | #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) | |
117 | #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \ | |
118 | (val) >= 127875 ? 0x7FE0 : \ | |
119 | (val) < 0 ? ((val) - 62) / 125 * 32 : \ | |
120 | ((val) + 62) / 125 * 32) | |
121 | #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \ | |
122 | (val) >= 127000 ? 127 : \ | |
123 | ((val) + 500) / 1000) | |
124 | ||
125 | /* | |
126 | * Functions declaration | |
127 | */ | |
128 | ||
129 | static int lm63_attach_adapter(struct i2c_adapter *adapter); | |
130 | static int lm63_detach_client(struct i2c_client *client); | |
131 | ||
132 | static struct lm63_data *lm63_update_device(struct device *dev); | |
133 | ||
134 | static int lm63_detect(struct i2c_adapter *adapter, int address, int kind); | |
135 | static void lm63_init_client(struct i2c_client *client); | |
136 | ||
137 | /* | |
138 | * Driver data (common to all clients) | |
139 | */ | |
140 | ||
141 | static struct i2c_driver lm63_driver = { | |
142 | .owner = THIS_MODULE, | |
143 | .name = "lm63", | |
144 | .flags = I2C_DF_NOTIFY, | |
145 | .attach_adapter = lm63_attach_adapter, | |
146 | .detach_client = lm63_detach_client, | |
147 | }; | |
148 | ||
149 | /* | |
150 | * Client data (each client gets its own) | |
151 | */ | |
152 | ||
153 | struct lm63_data { | |
154 | struct i2c_client client; | |
155 | struct semaphore update_lock; | |
156 | char valid; /* zero until following fields are valid */ | |
157 | unsigned long last_updated; /* in jiffies */ | |
158 | ||
159 | /* registers values */ | |
160 | u8 config, config_fan; | |
bc51ae11 JD |
161 | u16 fan[2]; /* 0: input |
162 | 1: low limit */ | |
1da177e4 LT |
163 | u8 pwm1_freq; |
164 | u8 pwm1_value; | |
bc51ae11 JD |
165 | s8 temp8[3]; /* 0: local input |
166 | 1: local high limit | |
167 | 2: remote critical limit */ | |
168 | s16 temp11[3]; /* 0: remote input | |
169 | 1: remote low limit | |
170 | 2: remote high limit */ | |
1da177e4 LT |
171 | u8 temp2_crit_hyst; |
172 | u8 alarms; | |
173 | }; | |
174 | ||
175 | /* | |
176 | * Sysfs callback functions and files | |
177 | */ | |
178 | ||
bc51ae11 JD |
179 | static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, |
180 | char *buf) | |
181 | { | |
182 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
183 | struct lm63_data *data = lm63_update_device(dev); | |
184 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); | |
1da177e4 | 185 | } |
1da177e4 | 186 | |
bc51ae11 JD |
187 | static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, |
188 | const char *buf, size_t count) | |
1da177e4 LT |
189 | { |
190 | struct i2c_client *client = to_i2c_client(dev); | |
191 | struct lm63_data *data = i2c_get_clientdata(client); | |
192 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
193 | ||
194 | down(&data->update_lock); | |
bc51ae11 | 195 | data->fan[1] = FAN_TO_REG(val); |
1da177e4 | 196 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, |
bc51ae11 | 197 | data->fan[1] & 0xFF); |
1da177e4 | 198 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, |
bc51ae11 | 199 | data->fan[1] >> 8); |
1da177e4 LT |
200 | up(&data->update_lock); |
201 | return count; | |
202 | } | |
203 | ||
bc51ae11 JD |
204 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, |
205 | char *buf) | |
1da177e4 LT |
206 | { |
207 | struct lm63_data *data = lm63_update_device(dev); | |
208 | return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? | |
209 | 255 : (data->pwm1_value * 255 + data->pwm1_freq) / | |
210 | (2 * data->pwm1_freq)); | |
211 | } | |
212 | ||
bc51ae11 JD |
213 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, |
214 | const char *buf, size_t count) | |
1da177e4 LT |
215 | { |
216 | struct i2c_client *client = to_i2c_client(dev); | |
217 | struct lm63_data *data = i2c_get_clientdata(client); | |
218 | unsigned long val; | |
219 | ||
220 | if (!(data->config_fan & 0x20)) /* register is read-only */ | |
221 | return -EPERM; | |
222 | ||
223 | val = simple_strtoul(buf, NULL, 10); | |
224 | down(&data->update_lock); | |
225 | data->pwm1_value = val <= 0 ? 0 : | |
226 | val >= 255 ? 2 * data->pwm1_freq : | |
227 | (val * data->pwm1_freq * 2 + 127) / 255; | |
228 | i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); | |
229 | up(&data->update_lock); | |
230 | return count; | |
231 | } | |
232 | ||
bc51ae11 JD |
233 | static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy, |
234 | char *buf) | |
1da177e4 LT |
235 | { |
236 | struct lm63_data *data = lm63_update_device(dev); | |
237 | return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); | |
238 | } | |
239 | ||
bc51ae11 JD |
240 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
241 | char *buf) | |
242 | { | |
243 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
244 | struct lm63_data *data = lm63_update_device(dev); | |
245 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); | |
1da177e4 | 246 | } |
bc51ae11 JD |
247 | |
248 | static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy, | |
249 | const char *buf, size_t count) | |
250 | { | |
251 | struct i2c_client *client = to_i2c_client(dev); | |
252 | struct lm63_data *data = i2c_get_clientdata(client); | |
253 | long val = simple_strtol(buf, NULL, 10); | |
254 | ||
255 | down(&data->update_lock); | |
256 | data->temp8[1] = TEMP8_TO_REG(val); | |
257 | i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]); | |
258 | up(&data->update_lock); | |
259 | return count; | |
1da177e4 | 260 | } |
bc51ae11 JD |
261 | |
262 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
263 | char *buf) | |
264 | { | |
265 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
266 | struct lm63_data *data = lm63_update_device(dev); | |
267 | return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])); | |
1da177e4 | 268 | } |
bc51ae11 JD |
269 | |
270 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
271 | const char *buf, size_t count) | |
272 | { | |
273 | static const u8 reg[4] = { | |
274 | LM63_REG_REMOTE_LOW_MSB, | |
275 | LM63_REG_REMOTE_LOW_LSB, | |
276 | LM63_REG_REMOTE_HIGH_MSB, | |
277 | LM63_REG_REMOTE_HIGH_LSB, | |
278 | }; | |
279 | ||
280 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
281 | struct i2c_client *client = to_i2c_client(dev); | |
282 | struct lm63_data *data = i2c_get_clientdata(client); | |
283 | long val = simple_strtol(buf, NULL, 10); | |
284 | int nr = attr->index; | |
285 | ||
286 | down(&data->update_lock); | |
287 | data->temp11[nr] = TEMP11_TO_REG(val); | |
288 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], | |
289 | data->temp11[nr] >> 8); | |
290 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], | |
291 | data->temp11[nr] & 0xff); | |
292 | up(&data->update_lock); | |
293 | return count; | |
1da177e4 | 294 | } |
1da177e4 LT |
295 | |
296 | /* Hysteresis register holds a relative value, while we want to present | |
297 | an absolute to user-space */ | |
bc51ae11 JD |
298 | static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
299 | char *buf) | |
1da177e4 LT |
300 | { |
301 | struct lm63_data *data = lm63_update_device(dev); | |
bc51ae11 | 302 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) |
1da177e4 LT |
303 | - TEMP8_FROM_REG(data->temp2_crit_hyst)); |
304 | } | |
305 | ||
306 | /* And now the other way around, user-space provides an absolute | |
307 | hysteresis value and we have to store a relative one */ | |
bc51ae11 JD |
308 | static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
309 | const char *buf, size_t count) | |
1da177e4 LT |
310 | { |
311 | struct i2c_client *client = to_i2c_client(dev); | |
312 | struct lm63_data *data = i2c_get_clientdata(client); | |
313 | long val = simple_strtol(buf, NULL, 10); | |
314 | long hyst; | |
315 | ||
316 | down(&data->update_lock); | |
bc51ae11 | 317 | hyst = TEMP8_FROM_REG(data->temp8[2]) - val; |
1da177e4 LT |
318 | i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, |
319 | HYST_TO_REG(hyst)); | |
320 | up(&data->update_lock); | |
321 | return count; | |
322 | } | |
323 | ||
bc51ae11 JD |
324 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
325 | char *buf) | |
1da177e4 LT |
326 | { |
327 | struct lm63_data *data = lm63_update_device(dev); | |
328 | return sprintf(buf, "%u\n", data->alarms); | |
329 | } | |
330 | ||
bc51ae11 JD |
331 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
332 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, | |
333 | set_fan, 1); | |
1da177e4 LT |
334 | |
335 | static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); | |
336 | static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); | |
337 | ||
bc51ae11 JD |
338 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0); |
339 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, | |
340 | set_temp8, 1); | |
1da177e4 | 341 | |
bc51ae11 JD |
342 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
343 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, | |
344 | set_temp11, 1); | |
345 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, | |
346 | set_temp11, 2); | |
347 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2); | |
1da177e4 LT |
348 | static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, |
349 | set_temp2_crit_hyst); | |
350 | ||
351 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
352 | ||
353 | /* | |
354 | * Real code | |
355 | */ | |
356 | ||
357 | static int lm63_attach_adapter(struct i2c_adapter *adapter) | |
358 | { | |
359 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
360 | return 0; | |
361 | return i2c_detect(adapter, &addr_data, lm63_detect); | |
362 | } | |
363 | ||
364 | /* | |
365 | * The following function does more than just detection. If detection | |
366 | * succeeds, it also registers the new chip. | |
367 | */ | |
368 | static int lm63_detect(struct i2c_adapter *adapter, int address, int kind) | |
369 | { | |
370 | struct i2c_client *new_client; | |
371 | struct lm63_data *data; | |
372 | int err = 0; | |
373 | ||
374 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
375 | goto exit; | |
376 | ||
377 | if (!(data = kmalloc(sizeof(struct lm63_data), GFP_KERNEL))) { | |
378 | err = -ENOMEM; | |
379 | goto exit; | |
380 | } | |
381 | memset(data, 0, sizeof(struct lm63_data)); | |
382 | ||
383 | /* The common I2C client data is placed right before the | |
384 | LM63-specific data. */ | |
385 | new_client = &data->client; | |
386 | i2c_set_clientdata(new_client, data); | |
387 | new_client->addr = address; | |
388 | new_client->adapter = adapter; | |
389 | new_client->driver = &lm63_driver; | |
390 | new_client->flags = 0; | |
391 | ||
392 | /* Default to an LM63 if forced */ | |
393 | if (kind == 0) | |
394 | kind = lm63; | |
395 | ||
396 | if (kind < 0) { /* must identify */ | |
397 | u8 man_id, chip_id, reg_config1, reg_config2; | |
398 | u8 reg_alert_status, reg_alert_mask; | |
399 | ||
400 | man_id = i2c_smbus_read_byte_data(new_client, | |
401 | LM63_REG_MAN_ID); | |
402 | chip_id = i2c_smbus_read_byte_data(new_client, | |
403 | LM63_REG_CHIP_ID); | |
404 | reg_config1 = i2c_smbus_read_byte_data(new_client, | |
405 | LM63_REG_CONFIG1); | |
406 | reg_config2 = i2c_smbus_read_byte_data(new_client, | |
407 | LM63_REG_CONFIG2); | |
408 | reg_alert_status = i2c_smbus_read_byte_data(new_client, | |
409 | LM63_REG_ALERT_STATUS); | |
410 | reg_alert_mask = i2c_smbus_read_byte_data(new_client, | |
411 | LM63_REG_ALERT_MASK); | |
412 | ||
413 | if (man_id == 0x01 /* National Semiconductor */ | |
414 | && chip_id == 0x41 /* LM63 */ | |
415 | && (reg_config1 & 0x18) == 0x00 | |
416 | && (reg_config2 & 0xF8) == 0x00 | |
417 | && (reg_alert_status & 0x20) == 0x00 | |
418 | && (reg_alert_mask & 0xA4) == 0xA4) { | |
419 | kind = lm63; | |
420 | } else { /* failed */ | |
421 | dev_dbg(&adapter->dev, "Unsupported chip " | |
422 | "(man_id=0x%02X, chip_id=0x%02X).\n", | |
423 | man_id, chip_id); | |
424 | goto exit_free; | |
425 | } | |
426 | } | |
427 | ||
428 | strlcpy(new_client->name, "lm63", I2C_NAME_SIZE); | |
429 | data->valid = 0; | |
430 | init_MUTEX(&data->update_lock); | |
431 | ||
432 | /* Tell the I2C layer a new client has arrived */ | |
433 | if ((err = i2c_attach_client(new_client))) | |
434 | goto exit_free; | |
435 | ||
436 | /* Initialize the LM63 chip */ | |
437 | lm63_init_client(new_client); | |
438 | ||
439 | /* Register sysfs hooks */ | |
440 | if (data->config & 0x04) { /* tachometer enabled */ | |
bc51ae11 JD |
441 | device_create_file(&new_client->dev, |
442 | &sensor_dev_attr_fan1_input.dev_attr); | |
443 | device_create_file(&new_client->dev, | |
444 | &sensor_dev_attr_fan1_min.dev_attr); | |
1da177e4 LT |
445 | } |
446 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
447 | device_create_file(&new_client->dev, &dev_attr_pwm1_enable); | |
bc51ae11 JD |
448 | device_create_file(&new_client->dev, |
449 | &sensor_dev_attr_temp1_input.dev_attr); | |
450 | device_create_file(&new_client->dev, | |
451 | &sensor_dev_attr_temp2_input.dev_attr); | |
452 | device_create_file(&new_client->dev, | |
453 | &sensor_dev_attr_temp2_min.dev_attr); | |
454 | device_create_file(&new_client->dev, | |
455 | &sensor_dev_attr_temp1_max.dev_attr); | |
456 | device_create_file(&new_client->dev, | |
457 | &sensor_dev_attr_temp2_max.dev_attr); | |
458 | device_create_file(&new_client->dev, | |
459 | &sensor_dev_attr_temp2_crit.dev_attr); | |
1da177e4 LT |
460 | device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst); |
461 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
462 | ||
463 | return 0; | |
464 | ||
465 | exit_free: | |
466 | kfree(data); | |
467 | exit: | |
468 | return err; | |
469 | } | |
470 | ||
471 | /* Idealy we shouldn't have to initialize anything, since the BIOS | |
472 | should have taken care of everything */ | |
473 | static void lm63_init_client(struct i2c_client *client) | |
474 | { | |
475 | struct lm63_data *data = i2c_get_clientdata(client); | |
476 | ||
477 | data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); | |
478 | data->config_fan = i2c_smbus_read_byte_data(client, | |
479 | LM63_REG_CONFIG_FAN); | |
480 | ||
481 | /* Start converting if needed */ | |
482 | if (data->config & 0x40) { /* standby */ | |
483 | dev_dbg(&client->dev, "Switching to operational mode"); | |
484 | data->config &= 0xA7; | |
485 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, | |
486 | data->config); | |
487 | } | |
488 | ||
489 | /* We may need pwm1_freq before ever updating the client data */ | |
490 | data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); | |
491 | if (data->pwm1_freq == 0) | |
492 | data->pwm1_freq = 1; | |
493 | ||
494 | /* Show some debug info about the LM63 configuration */ | |
495 | dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", | |
496 | (data->config & 0x04) ? "tachometer input" : | |
497 | "alert output"); | |
498 | dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", | |
499 | (data->config_fan & 0x08) ? "1.4" : "360", | |
500 | ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); | |
501 | dev_dbg(&client->dev, "PWM output active %s, %s mode\n", | |
502 | (data->config_fan & 0x10) ? "low" : "high", | |
503 | (data->config_fan & 0x20) ? "manual" : "auto"); | |
504 | } | |
505 | ||
506 | static int lm63_detach_client(struct i2c_client *client) | |
507 | { | |
508 | int err; | |
509 | ||
510 | if ((err = i2c_detach_client(client))) { | |
511 | dev_err(&client->dev, "Client deregistration failed, " | |
512 | "client not detached\n"); | |
513 | return err; | |
514 | } | |
515 | ||
516 | kfree(i2c_get_clientdata(client)); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static struct lm63_data *lm63_update_device(struct device *dev) | |
521 | { | |
522 | struct i2c_client *client = to_i2c_client(dev); | |
523 | struct lm63_data *data = i2c_get_clientdata(client); | |
524 | ||
525 | down(&data->update_lock); | |
526 | ||
527 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
528 | if (data->config & 0x04) { /* tachometer enabled */ | |
529 | /* order matters for fan1_input */ | |
bc51ae11 JD |
530 | data->fan[0] = i2c_smbus_read_byte_data(client, |
531 | LM63_REG_TACH_COUNT_LSB) & 0xFC; | |
532 | data->fan[0] |= i2c_smbus_read_byte_data(client, | |
533 | LM63_REG_TACH_COUNT_MSB) << 8; | |
534 | data->fan[1] = (i2c_smbus_read_byte_data(client, | |
535 | LM63_REG_TACH_LIMIT_LSB) & 0xFC) | |
536 | | (i2c_smbus_read_byte_data(client, | |
537 | LM63_REG_TACH_LIMIT_MSB) << 8); | |
1da177e4 LT |
538 | } |
539 | ||
540 | data->pwm1_freq = i2c_smbus_read_byte_data(client, | |
541 | LM63_REG_PWM_FREQ); | |
542 | if (data->pwm1_freq == 0) | |
543 | data->pwm1_freq = 1; | |
544 | data->pwm1_value = i2c_smbus_read_byte_data(client, | |
545 | LM63_REG_PWM_VALUE); | |
546 | ||
bc51ae11 JD |
547 | data->temp8[0] = i2c_smbus_read_byte_data(client, |
548 | LM63_REG_LOCAL_TEMP); | |
549 | data->temp8[1] = i2c_smbus_read_byte_data(client, | |
550 | LM63_REG_LOCAL_HIGH); | |
1da177e4 LT |
551 | |
552 | /* order matters for temp2_input */ | |
bc51ae11 JD |
553 | data->temp11[0] = i2c_smbus_read_byte_data(client, |
554 | LM63_REG_REMOTE_TEMP_MSB) << 8; | |
555 | data->temp11[0] |= i2c_smbus_read_byte_data(client, | |
556 | LM63_REG_REMOTE_TEMP_LSB); | |
557 | data->temp11[1] = (i2c_smbus_read_byte_data(client, | |
1da177e4 LT |
558 | LM63_REG_REMOTE_LOW_MSB) << 8) |
559 | | i2c_smbus_read_byte_data(client, | |
560 | LM63_REG_REMOTE_LOW_LSB); | |
bc51ae11 JD |
561 | data->temp11[2] = (i2c_smbus_read_byte_data(client, |
562 | LM63_REG_REMOTE_HIGH_MSB) << 8) | |
563 | | i2c_smbus_read_byte_data(client, | |
564 | LM63_REG_REMOTE_HIGH_LSB); | |
565 | data->temp8[2] = i2c_smbus_read_byte_data(client, | |
566 | LM63_REG_REMOTE_TCRIT); | |
1da177e4 LT |
567 | data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, |
568 | LM63_REG_REMOTE_TCRIT_HYST); | |
569 | ||
570 | data->alarms = i2c_smbus_read_byte_data(client, | |
571 | LM63_REG_ALERT_STATUS) & 0x7F; | |
572 | ||
573 | data->last_updated = jiffies; | |
574 | data->valid = 1; | |
575 | } | |
576 | ||
577 | up(&data->update_lock); | |
578 | ||
579 | return data; | |
580 | } | |
581 | ||
582 | static int __init sensors_lm63_init(void) | |
583 | { | |
584 | return i2c_add_driver(&lm63_driver); | |
585 | } | |
586 | ||
587 | static void __exit sensors_lm63_exit(void) | |
588 | { | |
589 | i2c_del_driver(&lm63_driver); | |
590 | } | |
591 | ||
592 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
593 | MODULE_DESCRIPTION("LM63 driver"); | |
594 | MODULE_LICENSE("GPL"); | |
595 | ||
596 | module_init(sensors_lm63_init); | |
597 | module_exit(sensors_lm63_exit); |