diff options
Diffstat (limited to 'drivers/i2c/chips/lm63.c')
-rw-r--r-- | drivers/i2c/chips/lm63.c | 597 |
1 files changed, 0 insertions, 597 deletions
diff --git a/drivers/i2c/chips/lm63.c b/drivers/i2c/chips/lm63.c deleted file mode 100644 index 7c6f9ea5a254..000000000000 --- a/drivers/i2c/chips/lm63.c +++ /dev/null | |||
@@ -1,597 +0,0 @@ | |||
1 | /* | ||
2 | * lm63.c - driver for the National Semiconductor LM63 temperature sensor | ||
3 | * with integrated fan control | ||
4 | * Copyright (C) 2004-2005 Jean Delvare <khali@linux-fr.org> | ||
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 | |||
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> | ||
46 | #include <linux/hwmon-sysfs.h> | ||
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 | ||
102 | * value, it uses signed 8-bit values with LSB = 1 degree Celsius. | ||
103 | * For remote temperature, low and high limits, it uses signed 11-bit values | ||
104 | * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. | ||
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; | ||
161 | u16 fan[2]; /* 0: input | ||
162 | 1: low limit */ | ||
163 | u8 pwm1_freq; | ||
164 | u8 pwm1_value; | ||
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 */ | ||
171 | u8 temp2_crit_hyst; | ||
172 | u8 alarms; | ||
173 | }; | ||
174 | |||
175 | /* | ||
176 | * Sysfs callback functions and files | ||
177 | */ | ||
178 | |||
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])); | ||
185 | } | ||
186 | |||
187 | static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, | ||
188 | const char *buf, size_t count) | ||
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); | ||
195 | data->fan[1] = FAN_TO_REG(val); | ||
196 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, | ||
197 | data->fan[1] & 0xFF); | ||
198 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, | ||
199 | data->fan[1] >> 8); | ||
200 | up(&data->update_lock); | ||
201 | return count; | ||
202 | } | ||
203 | |||
204 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, | ||
205 | char *buf) | ||
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 | |||
213 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, | ||
214 | const char *buf, size_t count) | ||
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 | |||
233 | static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy, | ||
234 | char *buf) | ||
235 | { | ||
236 | struct lm63_data *data = lm63_update_device(dev); | ||
237 | return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); | ||
238 | } | ||
239 | |||
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])); | ||
246 | } | ||
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; | ||
260 | } | ||
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])); | ||
268 | } | ||
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; | ||
294 | } | ||
295 | |||
296 | /* Hysteresis register holds a relative value, while we want to present | ||
297 | an absolute to user-space */ | ||
298 | static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, | ||
299 | char *buf) | ||
300 | { | ||
301 | struct lm63_data *data = lm63_update_device(dev); | ||
302 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) | ||
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 */ | ||
308 | static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, | ||
309 | const char *buf, size_t count) | ||
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); | ||
317 | hyst = TEMP8_FROM_REG(data->temp8[2]) - val; | ||
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 | |||
324 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, | ||
325 | char *buf) | ||
326 | { | ||
327 | struct lm63_data *data = lm63_update_device(dev); | ||
328 | return sprintf(buf, "%u\n", data->alarms); | ||
329 | } | ||
330 | |||
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); | ||
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 | |||
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); | ||
341 | |||
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); | ||
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 */ | ||
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); | ||
445 | } | ||
446 | device_create_file(&new_client->dev, &dev_attr_pwm1); | ||
447 | device_create_file(&new_client->dev, &dev_attr_pwm1_enable); | ||
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); | ||
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 */ | ||
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); | ||
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 | |||
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); | ||
551 | |||
552 | /* order matters for temp2_input */ | ||
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, | ||
558 | LM63_REG_REMOTE_LOW_MSB) << 8) | ||
559 | | i2c_smbus_read_byte_data(client, | ||
560 | LM63_REG_REMOTE_LOW_LSB); | ||
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); | ||
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); | ||