Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | smsc47m1.c - Part of lm_sensors, Linux kernel modules | |
3 | for hardware monitoring | |
4 | ||
0db9714a | 5 | Supports the SMSC LPC47B27x, LPC47M10x, LPC47M13x, LPC47M14x, |
b890a07f | 6 | LPC47M15x, LPC47M192 and LPC47M997 Super-I/O chips. |
1da177e4 LT |
7 | |
8 | Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> | |
9 | Copyright (C) 2004 Jean Delvare <khali@linux-fr.org> | |
10 | Ported to Linux 2.6 by Gabriele Gorla <gorlik@yahoo.com> | |
11 | and Jean Delvare | |
12 | ||
13 | This program is free software; you can redistribute it and/or modify | |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation; either version 2 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | This program is distributed in the hope that it will be useful, | |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
24 | along with this program; if not, write to the Free Software | |
25 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | */ | |
27 | ||
28 | #include <linux/module.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/ioport.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/i2c.h> | |
fde09509 | 33 | #include <linux/i2c-isa.h> |
943b0830 MH |
34 | #include <linux/hwmon.h> |
35 | #include <linux/err.h> | |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <asm/io.h> | |
38 | ||
1da177e4 | 39 | /* Address is autodetected, there is no default value */ |
2d8672c5 | 40 | static unsigned short address; |
1da177e4 LT |
41 | |
42 | /* Super-I/0 registers and commands */ | |
43 | ||
44 | #define REG 0x2e /* The register to read/write */ | |
45 | #define VAL 0x2f /* The value to read/write */ | |
46 | ||
47 | static inline void | |
48 | superio_outb(int reg, int val) | |
49 | { | |
50 | outb(reg, REG); | |
51 | outb(val, VAL); | |
52 | } | |
53 | ||
54 | static inline int | |
55 | superio_inb(int reg) | |
56 | { | |
57 | outb(reg, REG); | |
58 | return inb(VAL); | |
59 | } | |
60 | ||
61 | /* logical device for fans is 0x0A */ | |
62 | #define superio_select() superio_outb(0x07, 0x0A) | |
63 | ||
64 | static inline void | |
65 | superio_enter(void) | |
66 | { | |
67 | outb(0x55, REG); | |
68 | } | |
69 | ||
70 | static inline void | |
71 | superio_exit(void) | |
72 | { | |
73 | outb(0xAA, REG); | |
74 | } | |
75 | ||
76 | #define SUPERIO_REG_ACT 0x30 | |
77 | #define SUPERIO_REG_BASE 0x60 | |
78 | #define SUPERIO_REG_DEVID 0x20 | |
79 | ||
80 | /* Logical device registers */ | |
81 | ||
82 | #define SMSC_EXTENT 0x80 | |
83 | ||
84 | /* nr is 0 or 1 in the macros below */ | |
85 | #define SMSC47M1_REG_ALARM 0x04 | |
86 | #define SMSC47M1_REG_TPIN(nr) (0x34 - (nr)) | |
87 | #define SMSC47M1_REG_PPIN(nr) (0x36 - (nr)) | |
88 | #define SMSC47M1_REG_PWM(nr) (0x56 + (nr)) | |
89 | #define SMSC47M1_REG_FANDIV 0x58 | |
90 | #define SMSC47M1_REG_FAN(nr) (0x59 + (nr)) | |
91 | #define SMSC47M1_REG_FAN_PRELOAD(nr) (0x5B + (nr)) | |
92 | ||
93 | #define MIN_FROM_REG(reg,div) ((reg)>=192 ? 0 : \ | |
94 | 983040/((192-(reg))*(div))) | |
95 | #define FAN_FROM_REG(reg,div,preload) ((reg)<=(preload) || (reg)==255 ? 0 : \ | |
96 | 983040/(((reg)-(preload))*(div))) | |
97 | #define DIV_FROM_REG(reg) (1 << (reg)) | |
98 | #define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1) | |
99 | #define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01) | |
100 | #define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E) | |
101 | ||
102 | struct smsc47m1_data { | |
103 | struct i2c_client client; | |
943b0830 | 104 | struct class_device *class_dev; |
1da177e4 LT |
105 | struct semaphore lock; |
106 | ||
107 | struct semaphore update_lock; | |
108 | unsigned long last_updated; /* In jiffies */ | |
109 | ||
110 | u8 fan[2]; /* Register value */ | |
111 | u8 fan_preload[2]; /* Register value */ | |
112 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
113 | u8 alarms; /* Register encoding */ | |
114 | u8 pwm[2]; /* Register value (bit 7 is enable) */ | |
115 | }; | |
116 | ||
117 | ||
2d8672c5 | 118 | static int smsc47m1_detect(struct i2c_adapter *adapter); |
1da177e4 LT |
119 | static int smsc47m1_detach_client(struct i2c_client *client); |
120 | ||
121 | static int smsc47m1_read_value(struct i2c_client *client, u8 reg); | |
122 | static void smsc47m1_write_value(struct i2c_client *client, u8 reg, u8 value); | |
123 | ||
124 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, | |
125 | int init); | |
126 | ||
127 | ||
128 | static struct i2c_driver smsc47m1_driver = { | |
cdaf7934 | 129 | .driver = { |
cdaf7934 LR |
130 | .name = "smsc47m1", |
131 | }, | |
2d8672c5 | 132 | .attach_adapter = smsc47m1_detect, |
1da177e4 LT |
133 | .detach_client = smsc47m1_detach_client, |
134 | }; | |
135 | ||
136 | /* nr is 0 or 1 in the callback functions below */ | |
137 | ||
138 | static ssize_t get_fan(struct device *dev, char *buf, int nr) | |
139 | { | |
140 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
141 | /* This chip (stupidly) stops monitoring fan speed if PWM is | |
142 | enabled and duty cycle is 0%. This is fine if the monitoring | |
143 | and control concern the same fan, but troublesome if they are | |
144 | not (which could as well happen). */ | |
145 | int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 : | |
146 | FAN_FROM_REG(data->fan[nr], | |
147 | DIV_FROM_REG(data->fan_div[nr]), | |
148 | data->fan_preload[nr]); | |
149 | return sprintf(buf, "%d\n", rpm); | |
150 | } | |
151 | ||
152 | static ssize_t get_fan_min(struct device *dev, char *buf, int nr) | |
153 | { | |
154 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
155 | int rpm = MIN_FROM_REG(data->fan_preload[nr], | |
156 | DIV_FROM_REG(data->fan_div[nr])); | |
157 | return sprintf(buf, "%d\n", rpm); | |
158 | } | |
159 | ||
160 | static ssize_t get_fan_div(struct device *dev, char *buf, int nr) | |
161 | { | |
162 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
163 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); | |
164 | } | |
165 | ||
166 | static ssize_t get_pwm(struct device *dev, char *buf, int nr) | |
167 | { | |
168 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
169 | return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr])); | |
170 | } | |
171 | ||
172 | static ssize_t get_pwm_en(struct device *dev, char *buf, int nr) | |
173 | { | |
174 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
175 | return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[nr])); | |
176 | } | |
177 | ||
a5099cfc | 178 | static ssize_t get_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
179 | { |
180 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
181 | return sprintf(buf, "%d\n", data->alarms); | |
182 | } | |
183 | ||
184 | static ssize_t set_fan_min(struct device *dev, const char *buf, | |
185 | size_t count, int nr) | |
186 | { | |
187 | struct i2c_client *client = to_i2c_client(dev); | |
188 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
189 | long rpmdiv, val = simple_strtol(buf, NULL, 10); | |
190 | ||
191 | down(&data->update_lock); | |
192 | rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]); | |
193 | ||
194 | if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) { | |
195 | up(&data->update_lock); | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv); | |
200 | smsc47m1_write_value(client, SMSC47M1_REG_FAN_PRELOAD(nr), | |
201 | data->fan_preload[nr]); | |
202 | up(&data->update_lock); | |
203 | ||
204 | return count; | |
205 | } | |
206 | ||
207 | /* Note: we save and restore the fan minimum here, because its value is | |
208 | determined in part by the fan clock divider. This follows the principle | |
209 | of least suprise; the user doesn't expect the fan minimum to change just | |
210 | because the divider changed. */ | |
211 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
212 | size_t count, int nr) | |
213 | { | |
214 | struct i2c_client *client = to_i2c_client(dev); | |
215 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
216 | ||
217 | long new_div = simple_strtol(buf, NULL, 10), tmp; | |
218 | u8 old_div = DIV_FROM_REG(data->fan_div[nr]); | |
219 | ||
220 | if (new_div == old_div) /* No change */ | |
221 | return count; | |
222 | ||
223 | down(&data->update_lock); | |
224 | switch (new_div) { | |
225 | case 1: data->fan_div[nr] = 0; break; | |
226 | case 2: data->fan_div[nr] = 1; break; | |
227 | case 4: data->fan_div[nr] = 2; break; | |
228 | case 8: data->fan_div[nr] = 3; break; | |
229 | default: | |
230 | up(&data->update_lock); | |
231 | return -EINVAL; | |
232 | } | |
233 | ||
234 | tmp = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV) & 0x0F; | |
235 | tmp |= (data->fan_div[0] << 4) | (data->fan_div[1] << 6); | |
236 | smsc47m1_write_value(client, SMSC47M1_REG_FANDIV, tmp); | |
237 | ||
238 | /* Preserve fan min */ | |
239 | tmp = 192 - (old_div * (192 - data->fan_preload[nr]) | |
240 | + new_div / 2) / new_div; | |
241 | data->fan_preload[nr] = SENSORS_LIMIT(tmp, 0, 191); | |
242 | smsc47m1_write_value(client, SMSC47M1_REG_FAN_PRELOAD(nr), | |
243 | data->fan_preload[nr]); | |
244 | up(&data->update_lock); | |
245 | ||
246 | return count; | |
247 | } | |
248 | ||
249 | static ssize_t set_pwm(struct device *dev, const char *buf, | |
250 | size_t count, int nr) | |
251 | { | |
252 | struct i2c_client *client = to_i2c_client(dev); | |
253 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
254 | ||
255 | long val = simple_strtol(buf, NULL, 10); | |
256 | ||
257 | if (val < 0 || val > 255) | |
258 | return -EINVAL; | |
259 | ||
260 | down(&data->update_lock); | |
261 | data->pwm[nr] &= 0x81; /* Preserve additional bits */ | |
262 | data->pwm[nr] |= PWM_TO_REG(val); | |
263 | smsc47m1_write_value(client, SMSC47M1_REG_PWM(nr), | |
264 | data->pwm[nr]); | |
265 | up(&data->update_lock); | |
266 | ||
267 | return count; | |
268 | } | |
269 | ||
270 | static ssize_t set_pwm_en(struct device *dev, const char *buf, | |
271 | size_t count, int nr) | |
272 | { | |
273 | struct i2c_client *client = to_i2c_client(dev); | |
274 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
275 | ||
276 | long val = simple_strtol(buf, NULL, 10); | |
277 | ||
278 | if (val != 0 && val != 1) | |
279 | return -EINVAL; | |
280 | ||
281 | down(&data->update_lock); | |
282 | data->pwm[nr] &= 0xFE; /* preserve the other bits */ | |
283 | data->pwm[nr] |= !val; | |
284 | smsc47m1_write_value(client, SMSC47M1_REG_PWM(nr), | |
285 | data->pwm[nr]); | |
286 | up(&data->update_lock); | |
287 | ||
288 | return count; | |
289 | } | |
290 | ||
291 | #define fan_present(offset) \ | |
a5099cfc | 292 | static ssize_t get_fan##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
293 | { \ |
294 | return get_fan(dev, buf, offset - 1); \ | |
295 | } \ | |
a5099cfc | 296 | static ssize_t get_fan##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
297 | { \ |
298 | return get_fan_min(dev, buf, offset - 1); \ | |
299 | } \ | |
a5099cfc | 300 | static ssize_t set_fan##offset##_min (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
301 | const char *buf, size_t count) \ |
302 | { \ | |
303 | return set_fan_min(dev, buf, count, offset - 1); \ | |
304 | } \ | |
a5099cfc | 305 | static ssize_t get_fan##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
306 | { \ |
307 | return get_fan_div(dev, buf, offset - 1); \ | |
308 | } \ | |
a5099cfc | 309 | static ssize_t set_fan##offset##_div (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
310 | const char *buf, size_t count) \ |
311 | { \ | |
312 | return set_fan_div(dev, buf, count, offset - 1); \ | |
313 | } \ | |
a5099cfc | 314 | static ssize_t get_pwm##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
315 | { \ |
316 | return get_pwm(dev, buf, offset - 1); \ | |
317 | } \ | |
a5099cfc | 318 | static ssize_t set_pwm##offset (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
319 | const char *buf, size_t count) \ |
320 | { \ | |
321 | return set_pwm(dev, buf, count, offset - 1); \ | |
322 | } \ | |
a5099cfc | 323 | static ssize_t get_pwm##offset##_en (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
324 | { \ |
325 | return get_pwm_en(dev, buf, offset - 1); \ | |
326 | } \ | |
a5099cfc | 327 | static ssize_t set_pwm##offset##_en (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
328 | const char *buf, size_t count) \ |
329 | { \ | |
330 | return set_pwm_en(dev, buf, count, offset - 1); \ | |
331 | } \ | |
332 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan##offset, \ | |
333 | NULL); \ | |
334 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
335 | get_fan##offset##_min, set_fan##offset##_min); \ | |
336 | static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
337 | get_fan##offset##_div, set_fan##offset##_div); \ | |
338 | static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ | |
339 | get_pwm##offset, set_pwm##offset); \ | |
340 | static DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ | |
341 | get_pwm##offset##_en, set_pwm##offset##_en); | |
342 | ||
343 | fan_present(1); | |
344 | fan_present(2); | |
345 | ||
346 | static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); | |
347 | ||
e6cfb3ad | 348 | static int __init smsc47m1_find(unsigned short *addr) |
1da177e4 LT |
349 | { |
350 | u8 val; | |
351 | ||
352 | superio_enter(); | |
353 | val = superio_inb(SUPERIO_REG_DEVID); | |
354 | ||
355 | /* | |
356 | * SMSC LPC47M10x/LPC47M13x (device id 0x59), LPC47M14x (device id | |
357 | * 0x5F) and LPC47B27x (device id 0x51) have fan control. | |
358 | * The LPC47M15x and LPC47M192 chips "with hardware monitoring block" | |
ec5ce552 | 359 | * can do much more besides (device id 0x60). |
b890a07f JD |
360 | * The LPC47M997 is undocumented, but seems to be compatible with |
361 | * the LPC47M192, and has the same device id. | |
1da177e4 LT |
362 | */ |
363 | if (val == 0x51) | |
ec5ce552 | 364 | printk(KERN_INFO "smsc47m1: Found SMSC LPC47B27x\n"); |
1da177e4 | 365 | else if (val == 0x59) |
ec5ce552 | 366 | printk(KERN_INFO "smsc47m1: Found SMSC LPC47M10x/LPC47M13x\n"); |
1da177e4 | 367 | else if (val == 0x5F) |
ec5ce552 JD |
368 | printk(KERN_INFO "smsc47m1: Found SMSC LPC47M14x\n"); |
369 | else if (val == 0x60) | |
b890a07f JD |
370 | printk(KERN_INFO "smsc47m1: Found SMSC " |
371 | "LPC47M15x/LPC47M192/LPC47M997\n"); | |
1da177e4 LT |
372 | else { |
373 | superio_exit(); | |
374 | return -ENODEV; | |
375 | } | |
376 | ||
377 | superio_select(); | |
2d8672c5 JD |
378 | *addr = (superio_inb(SUPERIO_REG_BASE) << 8) |
379 | | superio_inb(SUPERIO_REG_BASE + 1); | |
1da177e4 | 380 | val = superio_inb(SUPERIO_REG_ACT); |
2d8672c5 | 381 | if (*addr == 0 || (val & 0x01) == 0) { |
1da177e4 LT |
382 | printk(KERN_INFO "smsc47m1: Device is disabled, will not use\n"); |
383 | superio_exit(); | |
384 | return -ENODEV; | |
385 | } | |
386 | ||
387 | superio_exit(); | |
388 | return 0; | |
389 | } | |
390 | ||
2d8672c5 | 391 | static int smsc47m1_detect(struct i2c_adapter *adapter) |
1da177e4 LT |
392 | { |
393 | struct i2c_client *new_client; | |
394 | struct smsc47m1_data *data; | |
395 | int err = 0; | |
396 | int fan1, fan2, pwm1, pwm2; | |
397 | ||
cdaf7934 | 398 | if (!request_region(address, SMSC_EXTENT, smsc47m1_driver.driver.name)) { |
1da177e4 LT |
399 | dev_err(&adapter->dev, "Region 0x%x already in use!\n", address); |
400 | return -EBUSY; | |
401 | } | |
402 | ||
ba9c2e8d | 403 | if (!(data = kzalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) { |
1da177e4 LT |
404 | err = -ENOMEM; |
405 | goto error_release; | |
406 | } | |
1da177e4 LT |
407 | |
408 | new_client = &data->client; | |
409 | i2c_set_clientdata(new_client, data); | |
410 | new_client->addr = address; | |
411 | init_MUTEX(&data->lock); | |
412 | new_client->adapter = adapter; | |
413 | new_client->driver = &smsc47m1_driver; | |
414 | new_client->flags = 0; | |
415 | ||
416 | strlcpy(new_client->name, "smsc47m1", I2C_NAME_SIZE); | |
417 | init_MUTEX(&data->update_lock); | |
418 | ||
419 | /* If no function is properly configured, there's no point in | |
420 | actually registering the chip. */ | |
421 | fan1 = (smsc47m1_read_value(new_client, SMSC47M1_REG_TPIN(0)) & 0x05) | |
422 | == 0x05; | |
423 | fan2 = (smsc47m1_read_value(new_client, SMSC47M1_REG_TPIN(1)) & 0x05) | |
424 | == 0x05; | |
425 | pwm1 = (smsc47m1_read_value(new_client, SMSC47M1_REG_PPIN(0)) & 0x05) | |
426 | == 0x04; | |
427 | pwm2 = (smsc47m1_read_value(new_client, SMSC47M1_REG_PPIN(1)) & 0x05) | |
428 | == 0x04; | |
429 | if (!(fan1 || fan2 || pwm1 || pwm2)) { | |
430 | dev_warn(&new_client->dev, "Device is not configured, will not use\n"); | |
431 | err = -ENODEV; | |
432 | goto error_free; | |
433 | } | |
434 | ||
435 | if ((err = i2c_attach_client(new_client))) | |
436 | goto error_free; | |
437 | ||
438 | /* Some values (fan min, clock dividers, pwm registers) may be | |
439 | needed before any update is triggered, so we better read them | |
440 | at least once here. We don't usually do it that way, but in | |
441 | this particular case, manually reading 5 registers out of 8 | |
442 | doesn't make much sense and we're better using the existing | |
443 | function. */ | |
444 | smsc47m1_update_device(&new_client->dev, 1); | |
445 | ||
943b0830 MH |
446 | /* Register sysfs hooks */ |
447 | data->class_dev = hwmon_device_register(&new_client->dev); | |
448 | if (IS_ERR(data->class_dev)) { | |
449 | err = PTR_ERR(data->class_dev); | |
450 | goto error_detach; | |
451 | } | |
452 | ||
1da177e4 LT |
453 | if (fan1) { |
454 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
455 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
456 | device_create_file(&new_client->dev, &dev_attr_fan1_div); | |
457 | } else | |
458 | dev_dbg(&new_client->dev, "Fan 1 not enabled by hardware, " | |
459 | "skipping\n"); | |
460 | ||
461 | if (fan2) { | |
462 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
463 | device_create_file(&new_client->dev, &dev_attr_fan2_min); | |
464 | device_create_file(&new_client->dev, &dev_attr_fan2_div); | |
465 | } else | |
466 | dev_dbg(&new_client->dev, "Fan 2 not enabled by hardware, " | |
467 | "skipping\n"); | |
468 | ||
469 | if (pwm1) { | |
470 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
471 | device_create_file(&new_client->dev, &dev_attr_pwm1_enable); | |
472 | } else | |
473 | dev_dbg(&new_client->dev, "PWM 1 not enabled by hardware, " | |
474 | "skipping\n"); | |
475 | if (pwm2) { | |
476 | device_create_file(&new_client->dev, &dev_attr_pwm2); | |
477 | device_create_file(&new_client->dev, &dev_attr_pwm2_enable); | |
478 | } else | |
479 | dev_dbg(&new_client->dev, "PWM 2 not enabled by hardware, " | |
480 | "skipping\n"); | |
481 | ||
482 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
483 | ||
484 | return 0; | |
485 | ||
943b0830 MH |
486 | error_detach: |
487 | i2c_detach_client(new_client); | |
1da177e4 | 488 | error_free: |
1f57ff89 | 489 | kfree(data); |
1da177e4 LT |
490 | error_release: |
491 | release_region(address, SMSC_EXTENT); | |
492 | return err; | |
493 | } | |
494 | ||
495 | static int smsc47m1_detach_client(struct i2c_client *client) | |
496 | { | |
943b0830 | 497 | struct smsc47m1_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
498 | int err; |
499 | ||
943b0830 MH |
500 | hwmon_device_unregister(data->class_dev); |
501 | ||
7bef5594 | 502 | if ((err = i2c_detach_client(client))) |
1da177e4 | 503 | return err; |
1da177e4 LT |
504 | |
505 | release_region(client->addr, SMSC_EXTENT); | |
943b0830 | 506 | kfree(data); |
1da177e4 LT |
507 | |
508 | return 0; | |
509 | } | |
510 | ||
511 | static int smsc47m1_read_value(struct i2c_client *client, u8 reg) | |
512 | { | |
513 | int res; | |
514 | ||
515 | down(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
516 | res = inb_p(client->addr + reg); | |
517 | up(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
518 | return res; | |
519 | } | |
520 | ||
521 | static void smsc47m1_write_value(struct i2c_client *client, u8 reg, u8 value) | |
522 | { | |
523 | down(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
524 | outb_p(value, client->addr + reg); | |
525 | up(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
526 | } | |
527 | ||
528 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, | |
529 | int init) | |
530 | { | |
531 | struct i2c_client *client = to_i2c_client(dev); | |
532 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
533 | ||
534 | down(&data->update_lock); | |
535 | ||
536 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) { | |
537 | int i; | |
538 | ||
539 | for (i = 0; i < 2; i++) { | |
540 | data->fan[i] = smsc47m1_read_value(client, | |
541 | SMSC47M1_REG_FAN(i)); | |
542 | data->fan_preload[i] = smsc47m1_read_value(client, | |
543 | SMSC47M1_REG_FAN_PRELOAD(i)); | |
544 | data->pwm[i] = smsc47m1_read_value(client, | |
545 | SMSC47M1_REG_PWM(i)); | |
546 | } | |
547 | ||
548 | i = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV); | |
549 | data->fan_div[0] = (i >> 4) & 0x03; | |
550 | data->fan_div[1] = i >> 6; | |
551 | ||
552 | data->alarms = smsc47m1_read_value(client, | |
553 | SMSC47M1_REG_ALARM) >> 6; | |
554 | /* Clear alarms if needed */ | |
555 | if (data->alarms) | |
556 | smsc47m1_write_value(client, SMSC47M1_REG_ALARM, 0xC0); | |
557 | ||
558 | data->last_updated = jiffies; | |
559 | } | |
560 | ||
561 | up(&data->update_lock); | |
562 | return data; | |
563 | } | |
564 | ||
565 | static int __init sm_smsc47m1_init(void) | |
566 | { | |
2d8672c5 | 567 | if (smsc47m1_find(&address)) { |
1da177e4 LT |
568 | return -ENODEV; |
569 | } | |
570 | ||
fde09509 | 571 | return i2c_isa_add_driver(&smsc47m1_driver); |
1da177e4 LT |
572 | } |
573 | ||
574 | static void __exit sm_smsc47m1_exit(void) | |
575 | { | |
fde09509 | 576 | i2c_isa_del_driver(&smsc47m1_driver); |
1da177e4 LT |
577 | } |
578 | ||
579 | MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>"); | |
580 | MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver"); | |
581 | MODULE_LICENSE("GPL"); | |
582 | ||
583 | module_init(sm_smsc47m1_init); | |
584 | module_exit(sm_smsc47m1_exit); |