Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | smsc47m1.c - Part of lm_sensors, Linux kernel modules | |
3 | for hardware monitoring | |
4 | ||
5 | Supports the SMSC LPC47B27x, LPC47M10x, LPC47M13x and LPC47M14x | |
6 | Super-I/O chips. | |
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> |
1da177e4 | 34 | #include <linux/i2c-sensor.h> |
943b0830 MH |
35 | #include <linux/hwmon.h> |
36 | #include <linux/err.h> | |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <asm/io.h> | |
39 | ||
40 | static unsigned short normal_i2c[] = { I2C_CLIENT_END }; | |
41 | /* Address is autodetected, there is no default value */ | |
42 | static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END }; | |
43 | static struct i2c_force_data forces[] = {{NULL}}; | |
44 | ||
45 | enum chips { any_chip, smsc47m1 }; | |
46 | static struct i2c_address_data addr_data = { | |
47 | .normal_i2c = normal_i2c, | |
48 | .normal_isa = normal_isa, | |
49 | .forces = forces, | |
50 | }; | |
51 | ||
52 | /* Super-I/0 registers and commands */ | |
53 | ||
54 | #define REG 0x2e /* The register to read/write */ | |
55 | #define VAL 0x2f /* The value to read/write */ | |
56 | ||
57 | static inline void | |
58 | superio_outb(int reg, int val) | |
59 | { | |
60 | outb(reg, REG); | |
61 | outb(val, VAL); | |
62 | } | |
63 | ||
64 | static inline int | |
65 | superio_inb(int reg) | |
66 | { | |
67 | outb(reg, REG); | |
68 | return inb(VAL); | |
69 | } | |
70 | ||
71 | /* logical device for fans is 0x0A */ | |
72 | #define superio_select() superio_outb(0x07, 0x0A) | |
73 | ||
74 | static inline void | |
75 | superio_enter(void) | |
76 | { | |
77 | outb(0x55, REG); | |
78 | } | |
79 | ||
80 | static inline void | |
81 | superio_exit(void) | |
82 | { | |
83 | outb(0xAA, REG); | |
84 | } | |
85 | ||
86 | #define SUPERIO_REG_ACT 0x30 | |
87 | #define SUPERIO_REG_BASE 0x60 | |
88 | #define SUPERIO_REG_DEVID 0x20 | |
89 | ||
90 | /* Logical device registers */ | |
91 | ||
92 | #define SMSC_EXTENT 0x80 | |
93 | ||
94 | /* nr is 0 or 1 in the macros below */ | |
95 | #define SMSC47M1_REG_ALARM 0x04 | |
96 | #define SMSC47M1_REG_TPIN(nr) (0x34 - (nr)) | |
97 | #define SMSC47M1_REG_PPIN(nr) (0x36 - (nr)) | |
98 | #define SMSC47M1_REG_PWM(nr) (0x56 + (nr)) | |
99 | #define SMSC47M1_REG_FANDIV 0x58 | |
100 | #define SMSC47M1_REG_FAN(nr) (0x59 + (nr)) | |
101 | #define SMSC47M1_REG_FAN_PRELOAD(nr) (0x5B + (nr)) | |
102 | ||
103 | #define MIN_FROM_REG(reg,div) ((reg)>=192 ? 0 : \ | |
104 | 983040/((192-(reg))*(div))) | |
105 | #define FAN_FROM_REG(reg,div,preload) ((reg)<=(preload) || (reg)==255 ? 0 : \ | |
106 | 983040/(((reg)-(preload))*(div))) | |
107 | #define DIV_FROM_REG(reg) (1 << (reg)) | |
108 | #define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1) | |
109 | #define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01) | |
110 | #define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E) | |
111 | ||
112 | struct smsc47m1_data { | |
113 | struct i2c_client client; | |
943b0830 | 114 | struct class_device *class_dev; |
1da177e4 LT |
115 | struct semaphore lock; |
116 | ||
117 | struct semaphore update_lock; | |
118 | unsigned long last_updated; /* In jiffies */ | |
119 | ||
120 | u8 fan[2]; /* Register value */ | |
121 | u8 fan_preload[2]; /* Register value */ | |
122 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
123 | u8 alarms; /* Register encoding */ | |
124 | u8 pwm[2]; /* Register value (bit 7 is enable) */ | |
125 | }; | |
126 | ||
127 | ||
128 | static int smsc47m1_attach_adapter(struct i2c_adapter *adapter); | |
129 | static int smsc47m1_find(int *address); | |
130 | static int smsc47m1_detect(struct i2c_adapter *adapter, int address, int kind); | |
131 | static int smsc47m1_detach_client(struct i2c_client *client); | |
132 | ||
133 | static int smsc47m1_read_value(struct i2c_client *client, u8 reg); | |
134 | static void smsc47m1_write_value(struct i2c_client *client, u8 reg, u8 value); | |
135 | ||
136 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, | |
137 | int init); | |
138 | ||
139 | ||
140 | static struct i2c_driver smsc47m1_driver = { | |
141 | .owner = THIS_MODULE, | |
142 | .name = "smsc47m1", | |
143 | .id = I2C_DRIVERID_SMSC47M1, | |
144 | .flags = I2C_DF_NOTIFY, | |
145 | .attach_adapter = smsc47m1_attach_adapter, | |
146 | .detach_client = smsc47m1_detach_client, | |
147 | }; | |
148 | ||
149 | /* nr is 0 or 1 in the callback functions below */ | |
150 | ||
151 | static ssize_t get_fan(struct device *dev, char *buf, int nr) | |
152 | { | |
153 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
154 | /* This chip (stupidly) stops monitoring fan speed if PWM is | |
155 | enabled and duty cycle is 0%. This is fine if the monitoring | |
156 | and control concern the same fan, but troublesome if they are | |
157 | not (which could as well happen). */ | |
158 | int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 : | |
159 | FAN_FROM_REG(data->fan[nr], | |
160 | DIV_FROM_REG(data->fan_div[nr]), | |
161 | data->fan_preload[nr]); | |
162 | return sprintf(buf, "%d\n", rpm); | |
163 | } | |
164 | ||
165 | static ssize_t get_fan_min(struct device *dev, char *buf, int nr) | |
166 | { | |
167 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
168 | int rpm = MIN_FROM_REG(data->fan_preload[nr], | |
169 | DIV_FROM_REG(data->fan_div[nr])); | |
170 | return sprintf(buf, "%d\n", rpm); | |
171 | } | |
172 | ||
173 | static ssize_t get_fan_div(struct device *dev, char *buf, int nr) | |
174 | { | |
175 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
176 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); | |
177 | } | |
178 | ||
179 | static ssize_t get_pwm(struct device *dev, char *buf, int nr) | |
180 | { | |
181 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
182 | return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr])); | |
183 | } | |
184 | ||
185 | static ssize_t get_pwm_en(struct device *dev, char *buf, int nr) | |
186 | { | |
187 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
188 | return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[nr])); | |
189 | } | |
190 | ||
a5099cfc | 191 | static ssize_t get_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
192 | { |
193 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
194 | return sprintf(buf, "%d\n", data->alarms); | |
195 | } | |
196 | ||
197 | static ssize_t set_fan_min(struct device *dev, const char *buf, | |
198 | size_t count, int nr) | |
199 | { | |
200 | struct i2c_client *client = to_i2c_client(dev); | |
201 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
202 | long rpmdiv, val = simple_strtol(buf, NULL, 10); | |
203 | ||
204 | down(&data->update_lock); | |
205 | rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]); | |
206 | ||
207 | if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) { | |
208 | up(&data->update_lock); | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
212 | data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv); | |
213 | smsc47m1_write_value(client, SMSC47M1_REG_FAN_PRELOAD(nr), | |
214 | data->fan_preload[nr]); | |
215 | up(&data->update_lock); | |
216 | ||
217 | return count; | |
218 | } | |
219 | ||
220 | /* Note: we save and restore the fan minimum here, because its value is | |
221 | determined in part by the fan clock divider. This follows the principle | |
222 | of least suprise; the user doesn't expect the fan minimum to change just | |
223 | because the divider changed. */ | |
224 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
225 | size_t count, int nr) | |
226 | { | |
227 | struct i2c_client *client = to_i2c_client(dev); | |
228 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
229 | ||
230 | long new_div = simple_strtol(buf, NULL, 10), tmp; | |
231 | u8 old_div = DIV_FROM_REG(data->fan_div[nr]); | |
232 | ||
233 | if (new_div == old_div) /* No change */ | |
234 | return count; | |
235 | ||
236 | down(&data->update_lock); | |
237 | switch (new_div) { | |
238 | case 1: data->fan_div[nr] = 0; break; | |
239 | case 2: data->fan_div[nr] = 1; break; | |
240 | case 4: data->fan_div[nr] = 2; break; | |
241 | case 8: data->fan_div[nr] = 3; break; | |
242 | default: | |
243 | up(&data->update_lock); | |
244 | return -EINVAL; | |
245 | } | |
246 | ||
247 | tmp = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV) & 0x0F; | |
248 | tmp |= (data->fan_div[0] << 4) | (data->fan_div[1] << 6); | |
249 | smsc47m1_write_value(client, SMSC47M1_REG_FANDIV, tmp); | |
250 | ||
251 | /* Preserve fan min */ | |
252 | tmp = 192 - (old_div * (192 - data->fan_preload[nr]) | |
253 | + new_div / 2) / new_div; | |
254 | data->fan_preload[nr] = SENSORS_LIMIT(tmp, 0, 191); | |
255 | smsc47m1_write_value(client, SMSC47M1_REG_FAN_PRELOAD(nr), | |
256 | data->fan_preload[nr]); | |
257 | up(&data->update_lock); | |
258 | ||
259 | return count; | |
260 | } | |
261 | ||
262 | static ssize_t set_pwm(struct device *dev, const char *buf, | |
263 | size_t count, int nr) | |
264 | { | |
265 | struct i2c_client *client = to_i2c_client(dev); | |
266 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
267 | ||
268 | long val = simple_strtol(buf, NULL, 10); | |
269 | ||
270 | if (val < 0 || val > 255) | |
271 | return -EINVAL; | |
272 | ||
273 | down(&data->update_lock); | |
274 | data->pwm[nr] &= 0x81; /* Preserve additional bits */ | |
275 | data->pwm[nr] |= PWM_TO_REG(val); | |
276 | smsc47m1_write_value(client, SMSC47M1_REG_PWM(nr), | |
277 | data->pwm[nr]); | |
278 | up(&data->update_lock); | |
279 | ||
280 | return count; | |
281 | } | |
282 | ||
283 | static ssize_t set_pwm_en(struct device *dev, const char *buf, | |
284 | size_t count, int nr) | |
285 | { | |
286 | struct i2c_client *client = to_i2c_client(dev); | |
287 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
288 | ||
289 | long val = simple_strtol(buf, NULL, 10); | |
290 | ||
291 | if (val != 0 && val != 1) | |
292 | return -EINVAL; | |
293 | ||
294 | down(&data->update_lock); | |
295 | data->pwm[nr] &= 0xFE; /* preserve the other bits */ | |
296 | data->pwm[nr] |= !val; | |
297 | smsc47m1_write_value(client, SMSC47M1_REG_PWM(nr), | |
298 | data->pwm[nr]); | |
299 | up(&data->update_lock); | |
300 | ||
301 | return count; | |
302 | } | |
303 | ||
304 | #define fan_present(offset) \ | |
a5099cfc | 305 | static ssize_t get_fan##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
306 | { \ |
307 | return get_fan(dev, buf, offset - 1); \ | |
308 | } \ | |
a5099cfc | 309 | static ssize_t get_fan##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
310 | { \ |
311 | return get_fan_min(dev, buf, offset - 1); \ | |
312 | } \ | |
a5099cfc | 313 | static ssize_t set_fan##offset##_min (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
314 | const char *buf, size_t count) \ |
315 | { \ | |
316 | return set_fan_min(dev, buf, count, offset - 1); \ | |
317 | } \ | |
a5099cfc | 318 | static ssize_t get_fan##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
319 | { \ |
320 | return get_fan_div(dev, buf, offset - 1); \ | |
321 | } \ | |
a5099cfc | 322 | static ssize_t set_fan##offset##_div (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
323 | const char *buf, size_t count) \ |
324 | { \ | |
325 | return set_fan_div(dev, buf, count, offset - 1); \ | |
326 | } \ | |
a5099cfc | 327 | static ssize_t get_pwm##offset (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
328 | { \ |
329 | return get_pwm(dev, buf, offset - 1); \ | |
330 | } \ | |
a5099cfc | 331 | static ssize_t set_pwm##offset (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
332 | const char *buf, size_t count) \ |
333 | { \ | |
334 | return set_pwm(dev, buf, count, offset - 1); \ | |
335 | } \ | |
a5099cfc | 336 | static ssize_t get_pwm##offset##_en (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
337 | { \ |
338 | return get_pwm_en(dev, buf, offset - 1); \ | |
339 | } \ | |
a5099cfc | 340 | static ssize_t set_pwm##offset##_en (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
341 | const char *buf, size_t count) \ |
342 | { \ | |
343 | return set_pwm_en(dev, buf, count, offset - 1); \ | |
344 | } \ | |
345 | static DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan##offset, \ | |
346 | NULL); \ | |
347 | static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
348 | get_fan##offset##_min, set_fan##offset##_min); \ | |
349 | static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
350 | get_fan##offset##_div, set_fan##offset##_div); \ | |
351 | static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ | |
352 | get_pwm##offset, set_pwm##offset); \ | |
353 | static DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ | |
354 | get_pwm##offset##_en, set_pwm##offset##_en); | |
355 | ||
356 | fan_present(1); | |
357 | fan_present(2); | |
358 | ||
359 | static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); | |
360 | ||
361 | static int smsc47m1_attach_adapter(struct i2c_adapter *adapter) | |
362 | { | |
363 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
364 | return 0; | |
365 | return i2c_detect(adapter, &addr_data, smsc47m1_detect); | |
366 | } | |
367 | ||
368 | static int smsc47m1_find(int *address) | |
369 | { | |
370 | u8 val; | |
371 | ||
372 | superio_enter(); | |
373 | val = superio_inb(SUPERIO_REG_DEVID); | |
374 | ||
375 | /* | |
376 | * SMSC LPC47M10x/LPC47M13x (device id 0x59), LPC47M14x (device id | |
377 | * 0x5F) and LPC47B27x (device id 0x51) have fan control. | |
378 | * The LPC47M15x and LPC47M192 chips "with hardware monitoring block" | |
ec5ce552 | 379 | * can do much more besides (device id 0x60). |
1da177e4 LT |
380 | */ |
381 | if (val == 0x51) | |
ec5ce552 | 382 | printk(KERN_INFO "smsc47m1: Found SMSC LPC47B27x\n"); |
1da177e4 | 383 | else if (val == 0x59) |
ec5ce552 | 384 | printk(KERN_INFO "smsc47m1: Found SMSC LPC47M10x/LPC47M13x\n"); |
1da177e4 | 385 | else if (val == 0x5F) |
ec5ce552 JD |
386 | printk(KERN_INFO "smsc47m1: Found SMSC LPC47M14x\n"); |
387 | else if (val == 0x60) | |
388 | printk(KERN_INFO "smsc47m1: Found SMSC LPC47M15x/LPC47M192\n"); | |
1da177e4 LT |
389 | else { |
390 | superio_exit(); | |
391 | return -ENODEV; | |
392 | } | |
393 | ||
394 | superio_select(); | |
395 | *address = (superio_inb(SUPERIO_REG_BASE) << 8) | |
396 | | superio_inb(SUPERIO_REG_BASE + 1); | |
397 | val = superio_inb(SUPERIO_REG_ACT); | |
398 | if (*address == 0 || (val & 0x01) == 0) { | |
399 | printk(KERN_INFO "smsc47m1: Device is disabled, will not use\n"); | |
400 | superio_exit(); | |
401 | return -ENODEV; | |
402 | } | |
403 | ||
404 | superio_exit(); | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static int smsc47m1_detect(struct i2c_adapter *adapter, int address, int kind) | |
409 | { | |
410 | struct i2c_client *new_client; | |
411 | struct smsc47m1_data *data; | |
412 | int err = 0; | |
413 | int fan1, fan2, pwm1, pwm2; | |
414 | ||
415 | if (!i2c_is_isa_adapter(adapter)) { | |
416 | return 0; | |
417 | } | |
418 | ||
419 | if (!request_region(address, SMSC_EXTENT, smsc47m1_driver.name)) { | |
420 | dev_err(&adapter->dev, "Region 0x%x already in use!\n", address); | |
421 | return -EBUSY; | |
422 | } | |
423 | ||
424 | if (!(data = kmalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) { | |
425 | err = -ENOMEM; | |
426 | goto error_release; | |
427 | } | |
428 | memset(data, 0x00, sizeof(struct smsc47m1_data)); | |
429 | ||
430 | new_client = &data->client; | |
431 | i2c_set_clientdata(new_client, data); | |
432 | new_client->addr = address; | |
433 | init_MUTEX(&data->lock); | |
434 | new_client->adapter = adapter; | |
435 | new_client->driver = &smsc47m1_driver; | |
436 | new_client->flags = 0; | |
437 | ||
438 | strlcpy(new_client->name, "smsc47m1", I2C_NAME_SIZE); | |
439 | init_MUTEX(&data->update_lock); | |
440 | ||
441 | /* If no function is properly configured, there's no point in | |
442 | actually registering the chip. */ | |
443 | fan1 = (smsc47m1_read_value(new_client, SMSC47M1_REG_TPIN(0)) & 0x05) | |
444 | == 0x05; | |
445 | fan2 = (smsc47m1_read_value(new_client, SMSC47M1_REG_TPIN(1)) & 0x05) | |
446 | == 0x05; | |
447 | pwm1 = (smsc47m1_read_value(new_client, SMSC47M1_REG_PPIN(0)) & 0x05) | |
448 | == 0x04; | |
449 | pwm2 = (smsc47m1_read_value(new_client, SMSC47M1_REG_PPIN(1)) & 0x05) | |
450 | == 0x04; | |
451 | if (!(fan1 || fan2 || pwm1 || pwm2)) { | |
452 | dev_warn(&new_client->dev, "Device is not configured, will not use\n"); | |
453 | err = -ENODEV; | |
454 | goto error_free; | |
455 | } | |
456 | ||
457 | if ((err = i2c_attach_client(new_client))) | |
458 | goto error_free; | |
459 | ||
460 | /* Some values (fan min, clock dividers, pwm registers) may be | |
461 | needed before any update is triggered, so we better read them | |
462 | at least once here. We don't usually do it that way, but in | |
463 | this particular case, manually reading 5 registers out of 8 | |
464 | doesn't make much sense and we're better using the existing | |
465 | function. */ | |
466 | smsc47m1_update_device(&new_client->dev, 1); | |
467 | ||
943b0830 MH |
468 | /* Register sysfs hooks */ |
469 | data->class_dev = hwmon_device_register(&new_client->dev); | |
470 | if (IS_ERR(data->class_dev)) { | |
471 | err = PTR_ERR(data->class_dev); | |
472 | goto error_detach; | |
473 | } | |
474 | ||
1da177e4 LT |
475 | if (fan1) { |
476 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
477 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
478 | device_create_file(&new_client->dev, &dev_attr_fan1_div); | |
479 | } else | |
480 | dev_dbg(&new_client->dev, "Fan 1 not enabled by hardware, " | |
481 | "skipping\n"); | |
482 | ||
483 | if (fan2) { | |
484 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
485 | device_create_file(&new_client->dev, &dev_attr_fan2_min); | |
486 | device_create_file(&new_client->dev, &dev_attr_fan2_div); | |
487 | } else | |
488 | dev_dbg(&new_client->dev, "Fan 2 not enabled by hardware, " | |
489 | "skipping\n"); | |
490 | ||
491 | if (pwm1) { | |
492 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
493 | device_create_file(&new_client->dev, &dev_attr_pwm1_enable); | |
494 | } else | |
495 | dev_dbg(&new_client->dev, "PWM 1 not enabled by hardware, " | |
496 | "skipping\n"); | |
497 | if (pwm2) { | |
498 | device_create_file(&new_client->dev, &dev_attr_pwm2); | |
499 | device_create_file(&new_client->dev, &dev_attr_pwm2_enable); | |
500 | } else | |
501 | dev_dbg(&new_client->dev, "PWM 2 not enabled by hardware, " | |
502 | "skipping\n"); | |
503 | ||
504 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
505 | ||
506 | return 0; | |
507 | ||
943b0830 MH |
508 | error_detach: |
509 | i2c_detach_client(new_client); | |
1da177e4 | 510 | error_free: |
1f57ff89 | 511 | kfree(data); |
1da177e4 LT |
512 | error_release: |
513 | release_region(address, SMSC_EXTENT); | |
514 | return err; | |
515 | } | |
516 | ||
517 | static int smsc47m1_detach_client(struct i2c_client *client) | |
518 | { | |
943b0830 | 519 | struct smsc47m1_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
520 | int err; |
521 | ||
943b0830 MH |
522 | hwmon_device_unregister(data->class_dev); |
523 | ||
1da177e4 LT |
524 | if ((err = i2c_detach_client(client))) { |
525 | dev_err(&client->dev, "Client deregistration failed, " | |
526 | "client not detached.\n"); | |
527 | return err; | |
528 | } | |
529 | ||
530 | release_region(client->addr, SMSC_EXTENT); | |
943b0830 | 531 | kfree(data); |
1da177e4 LT |
532 | |
533 | return 0; | |
534 | } | |
535 | ||
536 | static int smsc47m1_read_value(struct i2c_client *client, u8 reg) | |
537 | { | |
538 | int res; | |
539 | ||
540 | down(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
541 | res = inb_p(client->addr + reg); | |
542 | up(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
543 | return res; | |
544 | } | |
545 | ||
546 | static void smsc47m1_write_value(struct i2c_client *client, u8 reg, u8 value) | |
547 | { | |
548 | down(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
549 | outb_p(value, client->addr + reg); | |
550 | up(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); | |
551 | } | |
552 | ||
553 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, | |
554 | int init) | |
555 | { | |
556 | struct i2c_client *client = to_i2c_client(dev); | |
557 | struct smsc47m1_data *data = i2c_get_clientdata(client); | |
558 | ||
559 | down(&data->update_lock); | |
560 | ||
561 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) { | |
562 | int i; | |
563 | ||
564 | for (i = 0; i < 2; i++) { | |
565 | data->fan[i] = smsc47m1_read_value(client, | |
566 | SMSC47M1_REG_FAN(i)); | |
567 | data->fan_preload[i] = smsc47m1_read_value(client, | |
568 | SMSC47M1_REG_FAN_PRELOAD(i)); | |
569 | data->pwm[i] = smsc47m1_read_value(client, | |
570 | SMSC47M1_REG_PWM(i)); | |
571 | } | |
572 | ||
573 | i = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV); | |
574 | data->fan_div[0] = (i >> 4) & 0x03; | |
575 | data->fan_div[1] = i >> 6; | |
576 | ||
577 | data->alarms = smsc47m1_read_value(client, | |
578 | SMSC47M1_REG_ALARM) >> 6; | |
579 | /* Clear alarms if needed */ | |
580 | if (data->alarms) | |
581 | smsc47m1_write_value(client, SMSC47M1_REG_ALARM, 0xC0); | |
582 | ||
583 | data->last_updated = jiffies; | |
584 | } | |
585 | ||
586 | up(&data->update_lock); | |
587 | return data; | |
588 | } | |
589 | ||
590 | static int __init sm_smsc47m1_init(void) | |
591 | { | |
592 | if (smsc47m1_find(normal_isa)) { | |
593 | return -ENODEV; | |
594 | } | |
595 | ||
fde09509 | 596 | return i2c_isa_add_driver(&smsc47m1_driver); |
1da177e4 LT |
597 | } |
598 | ||
599 | static void __exit sm_smsc47m1_exit(void) | |
600 | { | |
fde09509 | 601 | i2c_isa_del_driver(&smsc47m1_driver); |
1da177e4 LT |
602 | } |
603 | ||
604 | MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>"); | |
605 | MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver"); | |
606 | MODULE_LICENSE("GPL"); | |
607 | ||
608 | module_init(sm_smsc47m1_init); | |
609 | module_exit(sm_smsc47m1_exit); |