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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 | ||
6091780e | 5 | Supports the SMSC LPC47B27x, LPC47M10x, LPC47M112, LPC47M13x, |
8eccbb6f JD |
6 | LPC47M14x, LPC47M15x, LPC47M192, LPC47M292 and LPC47M997 |
7 | Super-I/O chips. | |
1da177e4 LT |
8 | |
9 | Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> | |
8eccbb6f | 10 | Copyright (C) 2004-2007 Jean Delvare <khali@linux-fr.org> |
1da177e4 LT |
11 | Ported to Linux 2.6 by Gabriele Gorla <gorlik@yahoo.com> |
12 | and Jean Delvare | |
13 | ||
14 | This program is free software; you can redistribute it and/or modify | |
15 | it under the terms of the GNU General Public License as published by | |
16 | the Free Software Foundation; either version 2 of the License, or | |
17 | (at your option) any later version. | |
18 | ||
19 | This program is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
25 | along with this program; if not, write to the Free Software | |
26 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/ioport.h> | |
32 | #include <linux/jiffies.h> | |
51f2cca1 | 33 | #include <linux/platform_device.h> |
943b0830 | 34 | #include <linux/hwmon.h> |
e84cfbcb | 35 | #include <linux/hwmon-sysfs.h> |
943b0830 | 36 | #include <linux/err.h> |
1da177e4 | 37 | #include <linux/init.h> |
9a61bf63 | 38 | #include <linux/mutex.h> |
ce8c6ce1 | 39 | #include <linux/sysfs.h> |
b9acb64a | 40 | #include <linux/acpi.h> |
1da177e4 LT |
41 | #include <asm/io.h> |
42 | ||
67b671bc JD |
43 | static unsigned short force_id; |
44 | module_param(force_id, ushort, 0); | |
45 | MODULE_PARM_DESC(force_id, "Override the detected device ID"); | |
46 | ||
51f2cca1 JD |
47 | static struct platform_device *pdev; |
48 | ||
49 | #define DRVNAME "smsc47m1" | |
8eccbb6f | 50 | enum chips { smsc47m1, smsc47m2 }; |
1da177e4 LT |
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 | |
1b54ab45 | 89 | #define SUPERIO_REG_DEVREV 0x21 |
1da177e4 LT |
90 | |
91 | /* Logical device registers */ | |
92 | ||
93 | #define SMSC_EXTENT 0x80 | |
94 | ||
95 | /* nr is 0 or 1 in the macros below */ | |
96 | #define SMSC47M1_REG_ALARM 0x04 | |
97 | #define SMSC47M1_REG_TPIN(nr) (0x34 - (nr)) | |
98 | #define SMSC47M1_REG_PPIN(nr) (0x36 - (nr)) | |
1da177e4 | 99 | #define SMSC47M1_REG_FANDIV 0x58 |
8eccbb6f JD |
100 | |
101 | static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b }; | |
102 | static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c }; | |
103 | static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 }; | |
104 | ||
105 | #define SMSC47M2_REG_ALARM6 0x09 | |
106 | #define SMSC47M2_REG_TPIN1 0x38 | |
107 | #define SMSC47M2_REG_TPIN2 0x37 | |
108 | #define SMSC47M2_REG_TPIN3 0x2d | |
109 | #define SMSC47M2_REG_PPIN3 0x2c | |
110 | #define SMSC47M2_REG_FANDIV3 0x6a | |
1da177e4 LT |
111 | |
112 | #define MIN_FROM_REG(reg,div) ((reg)>=192 ? 0 : \ | |
113 | 983040/((192-(reg))*(div))) | |
114 | #define FAN_FROM_REG(reg,div,preload) ((reg)<=(preload) || (reg)==255 ? 0 : \ | |
115 | 983040/(((reg)-(preload))*(div))) | |
116 | #define DIV_FROM_REG(reg) (1 << (reg)) | |
117 | #define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1) | |
118 | #define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01) | |
119 | #define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E) | |
120 | ||
121 | struct smsc47m1_data { | |
51f2cca1 JD |
122 | unsigned short addr; |
123 | const char *name; | |
8eccbb6f | 124 | enum chips type; |
1beeffe4 | 125 | struct device *hwmon_dev; |
1da177e4 | 126 | |
9a61bf63 | 127 | struct mutex update_lock; |
1da177e4 LT |
128 | unsigned long last_updated; /* In jiffies */ |
129 | ||
8eccbb6f JD |
130 | u8 fan[3]; /* Register value */ |
131 | u8 fan_preload[3]; /* Register value */ | |
132 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
1da177e4 | 133 | u8 alarms; /* Register encoding */ |
8eccbb6f | 134 | u8 pwm[3]; /* Register value (bit 0 is disable) */ |
1da177e4 LT |
135 | }; |
136 | ||
51f2cca1 JD |
137 | struct smsc47m1_sio_data { |
138 | enum chips type; | |
139 | }; | |
1da177e4 | 140 | |
51f2cca1 JD |
141 | |
142 | static int smsc47m1_probe(struct platform_device *pdev); | |
d0546128 | 143 | static int __devexit smsc47m1_remove(struct platform_device *pdev); |
1da177e4 LT |
144 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, |
145 | int init); | |
146 | ||
51f2cca1 | 147 | static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg) |
94e183fd | 148 | { |
51f2cca1 | 149 | return inb_p(data->addr + reg); |
94e183fd JD |
150 | } |
151 | ||
51f2cca1 | 152 | static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg, |
94e183fd JD |
153 | u8 value) |
154 | { | |
51f2cca1 | 155 | outb_p(value, data->addr + reg); |
94e183fd | 156 | } |
1da177e4 | 157 | |
51f2cca1 | 158 | static struct platform_driver smsc47m1_driver = { |
cdaf7934 | 159 | .driver = { |
87218842 | 160 | .owner = THIS_MODULE, |
51f2cca1 | 161 | .name = DRVNAME, |
cdaf7934 | 162 | }, |
51f2cca1 JD |
163 | .probe = smsc47m1_probe, |
164 | .remove = __devexit_p(smsc47m1_remove), | |
1da177e4 LT |
165 | }; |
166 | ||
e84cfbcb JD |
167 | static ssize_t get_fan(struct device *dev, struct device_attribute |
168 | *devattr, char *buf) | |
1da177e4 | 169 | { |
e84cfbcb | 170 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 171 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 172 | int nr = attr->index; |
1da177e4 LT |
173 | /* This chip (stupidly) stops monitoring fan speed if PWM is |
174 | enabled and duty cycle is 0%. This is fine if the monitoring | |
175 | and control concern the same fan, but troublesome if they are | |
176 | not (which could as well happen). */ | |
177 | int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 : | |
178 | FAN_FROM_REG(data->fan[nr], | |
179 | DIV_FROM_REG(data->fan_div[nr]), | |
180 | data->fan_preload[nr]); | |
181 | return sprintf(buf, "%d\n", rpm); | |
182 | } | |
183 | ||
e84cfbcb JD |
184 | static ssize_t get_fan_min(struct device *dev, struct device_attribute |
185 | *devattr, char *buf) | |
1da177e4 | 186 | { |
e84cfbcb | 187 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 188 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 189 | int nr = attr->index; |
1da177e4 LT |
190 | int rpm = MIN_FROM_REG(data->fan_preload[nr], |
191 | DIV_FROM_REG(data->fan_div[nr])); | |
192 | return sprintf(buf, "%d\n", rpm); | |
193 | } | |
194 | ||
e84cfbcb JD |
195 | static ssize_t get_fan_div(struct device *dev, struct device_attribute |
196 | *devattr, char *buf) | |
1da177e4 | 197 | { |
e84cfbcb | 198 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 199 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 200 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
201 | } |
202 | ||
1f08af7e JD |
203 | static ssize_t get_fan_alarm(struct device *dev, struct device_attribute |
204 | *devattr, char *buf) | |
205 | { | |
206 | int bitnr = to_sensor_dev_attr(devattr)->index; | |
207 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
208 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
209 | } | |
210 | ||
e84cfbcb JD |
211 | static ssize_t get_pwm(struct device *dev, struct device_attribute |
212 | *devattr, char *buf) | |
1da177e4 | 213 | { |
e84cfbcb | 214 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 215 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 216 | return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index])); |
1da177e4 LT |
217 | } |
218 | ||
e84cfbcb JD |
219 | static ssize_t get_pwm_en(struct device *dev, struct device_attribute |
220 | *devattr, char *buf) | |
1da177e4 | 221 | { |
e84cfbcb | 222 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 223 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 224 | return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index])); |
1da177e4 LT |
225 | } |
226 | ||
e84cfbcb JD |
227 | static ssize_t get_alarms(struct device *dev, struct device_attribute |
228 | *devattr, char *buf) | |
1da177e4 LT |
229 | { |
230 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
231 | return sprintf(buf, "%d\n", data->alarms); | |
232 | } | |
233 | ||
e84cfbcb JD |
234 | static ssize_t set_fan_min(struct device *dev, struct device_attribute |
235 | *devattr, const char *buf, size_t count) | |
1da177e4 | 236 | { |
e84cfbcb | 237 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 238 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 239 | int nr = attr->index; |
1da177e4 LT |
240 | long rpmdiv, val = simple_strtol(buf, NULL, 10); |
241 | ||
9a61bf63 | 242 | mutex_lock(&data->update_lock); |
1da177e4 LT |
243 | rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]); |
244 | ||
245 | if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) { | |
9a61bf63 | 246 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
247 | return -EINVAL; |
248 | } | |
249 | ||
250 | data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv); | |
51f2cca1 | 251 | smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr], |
1da177e4 | 252 | data->fan_preload[nr]); |
9a61bf63 | 253 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
254 | |
255 | return count; | |
256 | } | |
257 | ||
258 | /* Note: we save and restore the fan minimum here, because its value is | |
259 | determined in part by the fan clock divider. This follows the principle | |
d6e05edc | 260 | of least surprise; the user doesn't expect the fan minimum to change just |
1da177e4 | 261 | because the divider changed. */ |
e84cfbcb JD |
262 | static ssize_t set_fan_div(struct device *dev, struct device_attribute |
263 | *devattr, const char *buf, size_t count) | |
1da177e4 | 264 | { |
e84cfbcb | 265 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 266 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 267 | int nr = attr->index; |
1da177e4 LT |
268 | long new_div = simple_strtol(buf, NULL, 10), tmp; |
269 | u8 old_div = DIV_FROM_REG(data->fan_div[nr]); | |
270 | ||
271 | if (new_div == old_div) /* No change */ | |
272 | return count; | |
273 | ||
9a61bf63 | 274 | mutex_lock(&data->update_lock); |
1da177e4 LT |
275 | switch (new_div) { |
276 | case 1: data->fan_div[nr] = 0; break; | |
277 | case 2: data->fan_div[nr] = 1; break; | |
278 | case 4: data->fan_div[nr] = 2; break; | |
279 | case 8: data->fan_div[nr] = 3; break; | |
280 | default: | |
9a61bf63 | 281 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
282 | return -EINVAL; |
283 | } | |
284 | ||
8eccbb6f JD |
285 | switch (nr) { |
286 | case 0: | |
287 | case 1: | |
51f2cca1 | 288 | tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV) |
8eccbb6f JD |
289 | & ~(0x03 << (4 + 2 * nr)); |
290 | tmp |= data->fan_div[nr] << (4 + 2 * nr); | |
51f2cca1 | 291 | smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp); |
8eccbb6f JD |
292 | break; |
293 | case 2: | |
51f2cca1 | 294 | tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF; |
8eccbb6f | 295 | tmp |= data->fan_div[2] << 4; |
51f2cca1 | 296 | smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp); |
8eccbb6f JD |
297 | break; |
298 | } | |
1da177e4 LT |
299 | |
300 | /* Preserve fan min */ | |
301 | tmp = 192 - (old_div * (192 - data->fan_preload[nr]) | |
302 | + new_div / 2) / new_div; | |
303 | data->fan_preload[nr] = SENSORS_LIMIT(tmp, 0, 191); | |
51f2cca1 | 304 | smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr], |
1da177e4 | 305 | data->fan_preload[nr]); |
9a61bf63 | 306 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
307 | |
308 | return count; | |
309 | } | |
310 | ||
e84cfbcb JD |
311 | static ssize_t set_pwm(struct device *dev, struct device_attribute |
312 | *devattr, const char *buf, size_t count) | |
1da177e4 | 313 | { |
e84cfbcb | 314 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 315 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 316 | int nr = attr->index; |
1da177e4 LT |
317 | long val = simple_strtol(buf, NULL, 10); |
318 | ||
319 | if (val < 0 || val > 255) | |
320 | return -EINVAL; | |
321 | ||
9a61bf63 | 322 | mutex_lock(&data->update_lock); |
1da177e4 LT |
323 | data->pwm[nr] &= 0x81; /* Preserve additional bits */ |
324 | data->pwm[nr] |= PWM_TO_REG(val); | |
51f2cca1 | 325 | smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr], |
1da177e4 | 326 | data->pwm[nr]); |
9a61bf63 | 327 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
328 | |
329 | return count; | |
330 | } | |
331 | ||
e84cfbcb JD |
332 | static ssize_t set_pwm_en(struct device *dev, struct device_attribute |
333 | *devattr, const char *buf, size_t count) | |
1da177e4 | 334 | { |
e84cfbcb | 335 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 336 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 337 | int nr = attr->index; |
1da177e4 LT |
338 | long val = simple_strtol(buf, NULL, 10); |
339 | ||
340 | if (val != 0 && val != 1) | |
341 | return -EINVAL; | |
342 | ||
9a61bf63 | 343 | mutex_lock(&data->update_lock); |
1da177e4 LT |
344 | data->pwm[nr] &= 0xFE; /* preserve the other bits */ |
345 | data->pwm[nr] |= !val; | |
51f2cca1 | 346 | smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr], |
1da177e4 | 347 | data->pwm[nr]); |
9a61bf63 | 348 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
349 | |
350 | return count; | |
351 | } | |
352 | ||
353 | #define fan_present(offset) \ | |
e84cfbcb JD |
354 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan, \ |
355 | NULL, offset - 1); \ | |
356 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
357 | get_fan_min, set_fan_min, offset - 1); \ | |
358 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
359 | get_fan_div, set_fan_div, offset - 1); \ | |
1f08af7e JD |
360 | static SENSOR_DEVICE_ATTR(fan##offset##_alarm, S_IRUGO, get_fan_alarm, \ |
361 | NULL, offset - 1); \ | |
e84cfbcb JD |
362 | static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ |
363 | get_pwm, set_pwm, offset - 1); \ | |
364 | static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ | |
365 | get_pwm_en, set_pwm_en, offset - 1) | |
1da177e4 LT |
366 | |
367 | fan_present(1); | |
368 | fan_present(2); | |
8eccbb6f | 369 | fan_present(3); |
1da177e4 LT |
370 | |
371 | static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); | |
372 | ||
51f2cca1 JD |
373 | static ssize_t show_name(struct device *dev, struct device_attribute |
374 | *devattr, char *buf) | |
375 | { | |
376 | struct smsc47m1_data *data = dev_get_drvdata(dev); | |
377 | ||
378 | return sprintf(buf, "%s\n", data->name); | |
379 | } | |
380 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
381 | ||
ce8c6ce1 JD |
382 | /* Almost all sysfs files may or may not be created depending on the chip |
383 | setup so we create them individually. It is still convenient to define a | |
384 | group to remove them all at once. */ | |
385 | static struct attribute *smsc47m1_attributes[] = { | |
e84cfbcb JD |
386 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
387 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
388 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
1f08af7e | 389 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
e84cfbcb JD |
390 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
391 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
392 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
1f08af7e | 393 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
e84cfbcb JD |
394 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
395 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
396 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
1f08af7e | 397 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
e84cfbcb JD |
398 | |
399 | &sensor_dev_attr_pwm1.dev_attr.attr, | |
400 | &sensor_dev_attr_pwm1_enable.dev_attr.attr, | |
401 | &sensor_dev_attr_pwm2.dev_attr.attr, | |
402 | &sensor_dev_attr_pwm2_enable.dev_attr.attr, | |
403 | &sensor_dev_attr_pwm3.dev_attr.attr, | |
404 | &sensor_dev_attr_pwm3_enable.dev_attr.attr, | |
ce8c6ce1 JD |
405 | |
406 | &dev_attr_alarms.attr, | |
51f2cca1 | 407 | &dev_attr_name.attr, |
ce8c6ce1 JD |
408 | NULL |
409 | }; | |
410 | ||
411 | static const struct attribute_group smsc47m1_group = { | |
412 | .attrs = smsc47m1_attributes, | |
413 | }; | |
414 | ||
51f2cca1 JD |
415 | static int __init smsc47m1_find(unsigned short *addr, |
416 | struct smsc47m1_sio_data *sio_data) | |
1da177e4 LT |
417 | { |
418 | u8 val; | |
419 | ||
420 | superio_enter(); | |
67b671bc | 421 | val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID); |
1da177e4 LT |
422 | |
423 | /* | |
6091780e JD |
424 | * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x |
425 | * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control. | |
1da177e4 | 426 | * The LPC47M15x and LPC47M192 chips "with hardware monitoring block" |
ec5ce552 | 427 | * can do much more besides (device id 0x60). |
b890a07f JD |
428 | * The LPC47M997 is undocumented, but seems to be compatible with |
429 | * the LPC47M192, and has the same device id. | |
8eccbb6f JD |
430 | * The LPC47M292 (device id 0x6B) is somewhat compatible, but it |
431 | * supports a 3rd fan, and the pin configuration registers are | |
432 | * unfortunately different. | |
1b54ab45 JD |
433 | * The LPC47M233 has the same device id (0x6B) but is not compatible. |
434 | * We check the high bit of the device revision register to | |
435 | * differentiate them. | |
1da177e4 | 436 | */ |
51f2cca1 | 437 | switch (val) { |
8eccbb6f | 438 | case 0x51: |
620100cf | 439 | pr_info(DRVNAME ": Found SMSC LPC47B27x\n"); |
51f2cca1 | 440 | sio_data->type = smsc47m1; |
8eccbb6f JD |
441 | break; |
442 | case 0x59: | |
620100cf | 443 | pr_info(DRVNAME ": Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n"); |
51f2cca1 | 444 | sio_data->type = smsc47m1; |
8eccbb6f JD |
445 | break; |
446 | case 0x5F: | |
620100cf | 447 | pr_info(DRVNAME ": Found SMSC LPC47M14x\n"); |
51f2cca1 | 448 | sio_data->type = smsc47m1; |
8eccbb6f JD |
449 | break; |
450 | case 0x60: | |
620100cf | 451 | pr_info(DRVNAME ": Found SMSC LPC47M15x/LPC47M192/LPC47M997\n"); |
51f2cca1 | 452 | sio_data->type = smsc47m1; |
8eccbb6f JD |
453 | break; |
454 | case 0x6B: | |
1b54ab45 JD |
455 | if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) { |
456 | pr_debug(DRVNAME ": " | |
457 | "Found SMSC LPC47M233, unsupported\n"); | |
458 | superio_exit(); | |
459 | return -ENODEV; | |
460 | } | |
461 | ||
620100cf | 462 | pr_info(DRVNAME ": Found SMSC LPC47M292\n"); |
51f2cca1 | 463 | sio_data->type = smsc47m2; |
8eccbb6f JD |
464 | break; |
465 | default: | |
1da177e4 LT |
466 | superio_exit(); |
467 | return -ENODEV; | |
468 | } | |
469 | ||
470 | superio_select(); | |
2d8672c5 JD |
471 | *addr = (superio_inb(SUPERIO_REG_BASE) << 8) |
472 | | superio_inb(SUPERIO_REG_BASE + 1); | |
1da177e4 | 473 | val = superio_inb(SUPERIO_REG_ACT); |
2d8672c5 | 474 | if (*addr == 0 || (val & 0x01) == 0) { |
620100cf | 475 | pr_info(DRVNAME ": Device is disabled, will not use\n"); |
1da177e4 LT |
476 | superio_exit(); |
477 | return -ENODEV; | |
478 | } | |
479 | ||
480 | superio_exit(); | |
481 | return 0; | |
482 | } | |
483 | ||
51f2cca1 | 484 | static int __devinit smsc47m1_probe(struct platform_device *pdev) |
1da177e4 | 485 | { |
51f2cca1 JD |
486 | struct device *dev = &pdev->dev; |
487 | struct smsc47m1_sio_data *sio_data = dev->platform_data; | |
1da177e4 | 488 | struct smsc47m1_data *data; |
51f2cca1 | 489 | struct resource *res; |
1da177e4 | 490 | int err = 0; |
8eccbb6f | 491 | int fan1, fan2, fan3, pwm1, pwm2, pwm3; |
1da177e4 | 492 | |
51f2cca1 JD |
493 | static const char *names[] = { |
494 | "smsc47m1", | |
495 | "smsc47m2", | |
496 | }; | |
497 | ||
498 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
499 | if (!request_region(res->start, SMSC_EXTENT, DRVNAME)) { | |
500 | dev_err(dev, "Region 0x%lx-0x%lx already in use!\n", | |
501 | (unsigned long)res->start, | |
502 | (unsigned long)res->end); | |
1da177e4 LT |
503 | return -EBUSY; |
504 | } | |
505 | ||
ba9c2e8d | 506 | if (!(data = kzalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) { |
1da177e4 LT |
507 | err = -ENOMEM; |
508 | goto error_release; | |
509 | } | |
1da177e4 | 510 | |
51f2cca1 JD |
511 | data->addr = res->start; |
512 | data->type = sio_data->type; | |
513 | data->name = names[sio_data->type]; | |
9a61bf63 | 514 | mutex_init(&data->update_lock); |
51f2cca1 | 515 | platform_set_drvdata(pdev, data); |
1da177e4 LT |
516 | |
517 | /* If no function is properly configured, there's no point in | |
518 | actually registering the chip. */ | |
51f2cca1 | 519 | pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05) |
1da177e4 | 520 | == 0x04; |
51f2cca1 | 521 | pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05) |
1da177e4 | 522 | == 0x04; |
8eccbb6f | 523 | if (data->type == smsc47m2) { |
51f2cca1 | 524 | fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1) |
8eccbb6f | 525 | & 0x0d) == 0x09; |
51f2cca1 | 526 | fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2) |
8eccbb6f | 527 | & 0x0d) == 0x09; |
51f2cca1 | 528 | fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3) |
8eccbb6f | 529 | & 0x0d) == 0x0d; |
51f2cca1 | 530 | pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3) |
8eccbb6f JD |
531 | & 0x0d) == 0x08; |
532 | } else { | |
51f2cca1 | 533 | fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0)) |
8eccbb6f | 534 | & 0x05) == 0x05; |
51f2cca1 | 535 | fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1)) |
8eccbb6f JD |
536 | & 0x05) == 0x05; |
537 | fan3 = 0; | |
538 | pwm3 = 0; | |
539 | } | |
540 | if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) { | |
51f2cca1 | 541 | dev_warn(dev, "Device not configured, will not use\n"); |
1da177e4 LT |
542 | err = -ENODEV; |
543 | goto error_free; | |
544 | } | |
545 | ||
1da177e4 LT |
546 | /* Some values (fan min, clock dividers, pwm registers) may be |
547 | needed before any update is triggered, so we better read them | |
548 | at least once here. We don't usually do it that way, but in | |
549 | this particular case, manually reading 5 registers out of 8 | |
550 | doesn't make much sense and we're better using the existing | |
551 | function. */ | |
51f2cca1 | 552 | smsc47m1_update_device(dev, 1); |
1da177e4 | 553 | |
943b0830 | 554 | /* Register sysfs hooks */ |
1da177e4 | 555 | if (fan1) { |
e84cfbcb JD |
556 | if ((err = device_create_file(dev, |
557 | &sensor_dev_attr_fan1_input.dev_attr)) | |
558 | || (err = device_create_file(dev, | |
559 | &sensor_dev_attr_fan1_min.dev_attr)) | |
560 | || (err = device_create_file(dev, | |
1f08af7e JD |
561 | &sensor_dev_attr_fan1_div.dev_attr)) |
562 | || (err = device_create_file(dev, | |
563 | &sensor_dev_attr_fan1_alarm.dev_attr))) | |
ce8c6ce1 | 564 | goto error_remove_files; |
1da177e4 | 565 | } else |
51f2cca1 | 566 | dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n"); |
1da177e4 LT |
567 | |
568 | if (fan2) { | |
e84cfbcb JD |
569 | if ((err = device_create_file(dev, |
570 | &sensor_dev_attr_fan2_input.dev_attr)) | |
571 | || (err = device_create_file(dev, | |
572 | &sensor_dev_attr_fan2_min.dev_attr)) | |
573 | || (err = device_create_file(dev, | |
1f08af7e JD |
574 | &sensor_dev_attr_fan2_div.dev_attr)) |
575 | || (err = device_create_file(dev, | |
576 | &sensor_dev_attr_fan2_alarm.dev_attr))) | |
ce8c6ce1 | 577 | goto error_remove_files; |
1da177e4 | 578 | } else |
51f2cca1 | 579 | dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n"); |
1da177e4 | 580 | |
8eccbb6f | 581 | if (fan3) { |
e84cfbcb JD |
582 | if ((err = device_create_file(dev, |
583 | &sensor_dev_attr_fan3_input.dev_attr)) | |
584 | || (err = device_create_file(dev, | |
585 | &sensor_dev_attr_fan3_min.dev_attr)) | |
586 | || (err = device_create_file(dev, | |
1f08af7e JD |
587 | &sensor_dev_attr_fan3_div.dev_attr)) |
588 | || (err = device_create_file(dev, | |
589 | &sensor_dev_attr_fan3_alarm.dev_attr))) | |
8eccbb6f | 590 | goto error_remove_files; |
8477d026 | 591 | } else if (data->type == smsc47m2) |
51f2cca1 | 592 | dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n"); |
8eccbb6f | 593 | |
1da177e4 | 594 | if (pwm1) { |
e84cfbcb JD |
595 | if ((err = device_create_file(dev, |
596 | &sensor_dev_attr_pwm1.dev_attr)) | |
597 | || (err = device_create_file(dev, | |
598 | &sensor_dev_attr_pwm1_enable.dev_attr))) | |
ce8c6ce1 | 599 | goto error_remove_files; |
1da177e4 | 600 | } else |
51f2cca1 | 601 | dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n"); |
8eccbb6f | 602 | |
1da177e4 | 603 | if (pwm2) { |
e84cfbcb JD |
604 | if ((err = device_create_file(dev, |
605 | &sensor_dev_attr_pwm2.dev_attr)) | |
606 | || (err = device_create_file(dev, | |
607 | &sensor_dev_attr_pwm2_enable.dev_attr))) | |
ce8c6ce1 | 608 | goto error_remove_files; |
1da177e4 | 609 | } else |
51f2cca1 | 610 | dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n"); |
1da177e4 | 611 | |
8eccbb6f | 612 | if (pwm3) { |
e84cfbcb JD |
613 | if ((err = device_create_file(dev, |
614 | &sensor_dev_attr_pwm3.dev_attr)) | |
615 | || (err = device_create_file(dev, | |
616 | &sensor_dev_attr_pwm3_enable.dev_attr))) | |
8eccbb6f | 617 | goto error_remove_files; |
8477d026 | 618 | } else if (data->type == smsc47m2) |
51f2cca1 | 619 | dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n"); |
8eccbb6f | 620 | |
51f2cca1 | 621 | if ((err = device_create_file(dev, &dev_attr_alarms))) |
ce8c6ce1 | 622 | goto error_remove_files; |
68a50b56 JD |
623 | if ((err = device_create_file(dev, &dev_attr_name))) |
624 | goto error_remove_files; | |
ce8c6ce1 | 625 | |
1beeffe4 TJ |
626 | data->hwmon_dev = hwmon_device_register(dev); |
627 | if (IS_ERR(data->hwmon_dev)) { | |
628 | err = PTR_ERR(data->hwmon_dev); | |
ce8c6ce1 JD |
629 | goto error_remove_files; |
630 | } | |
1da177e4 LT |
631 | |
632 | return 0; | |
633 | ||
ce8c6ce1 | 634 | error_remove_files: |
51f2cca1 | 635 | sysfs_remove_group(&dev->kobj, &smsc47m1_group); |
1da177e4 | 636 | error_free: |
04a6217d | 637 | platform_set_drvdata(pdev, NULL); |
1f57ff89 | 638 | kfree(data); |
1da177e4 | 639 | error_release: |
51f2cca1 | 640 | release_region(res->start, SMSC_EXTENT); |
1da177e4 LT |
641 | return err; |
642 | } | |
643 | ||
51f2cca1 | 644 | static int __devexit smsc47m1_remove(struct platform_device *pdev) |
1da177e4 | 645 | { |
51f2cca1 JD |
646 | struct smsc47m1_data *data = platform_get_drvdata(pdev); |
647 | struct resource *res; | |
1da177e4 | 648 | |
1beeffe4 | 649 | hwmon_device_unregister(data->hwmon_dev); |
51f2cca1 | 650 | sysfs_remove_group(&pdev->dev.kobj, &smsc47m1_group); |
1da177e4 | 651 | |
51f2cca1 JD |
652 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
653 | release_region(res->start, SMSC_EXTENT); | |
04a6217d | 654 | platform_set_drvdata(pdev, NULL); |
943b0830 | 655 | kfree(data); |
1da177e4 LT |
656 | |
657 | return 0; | |
658 | } | |
659 | ||
1da177e4 LT |
660 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, |
661 | int init) | |
662 | { | |
51f2cca1 | 663 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
1da177e4 | 664 | |
9a61bf63 | 665 | mutex_lock(&data->update_lock); |
1da177e4 LT |
666 | |
667 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) { | |
8eccbb6f JD |
668 | int i, fan_nr; |
669 | fan_nr = data->type == smsc47m2 ? 3 : 2; | |
1da177e4 | 670 | |
8eccbb6f | 671 | for (i = 0; i < fan_nr; i++) { |
51f2cca1 | 672 | data->fan[i] = smsc47m1_read_value(data, |
8eccbb6f | 673 | SMSC47M1_REG_FAN[i]); |
51f2cca1 | 674 | data->fan_preload[i] = smsc47m1_read_value(data, |
8eccbb6f | 675 | SMSC47M1_REG_FAN_PRELOAD[i]); |
51f2cca1 | 676 | data->pwm[i] = smsc47m1_read_value(data, |
8eccbb6f | 677 | SMSC47M1_REG_PWM[i]); |
1da177e4 LT |
678 | } |
679 | ||
51f2cca1 | 680 | i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV); |
1da177e4 LT |
681 | data->fan_div[0] = (i >> 4) & 0x03; |
682 | data->fan_div[1] = i >> 6; | |
683 | ||
51f2cca1 | 684 | data->alarms = smsc47m1_read_value(data, |
1da177e4 LT |
685 | SMSC47M1_REG_ALARM) >> 6; |
686 | /* Clear alarms if needed */ | |
687 | if (data->alarms) | |
51f2cca1 | 688 | smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0); |
1da177e4 | 689 | |
8eccbb6f | 690 | if (fan_nr >= 3) { |
51f2cca1 | 691 | data->fan_div[2] = (smsc47m1_read_value(data, |
8eccbb6f | 692 | SMSC47M2_REG_FANDIV3) >> 4) & 0x03; |
51f2cca1 | 693 | data->alarms |= (smsc47m1_read_value(data, |
8eccbb6f JD |
694 | SMSC47M2_REG_ALARM6) & 0x40) >> 4; |
695 | /* Clear alarm if needed */ | |
696 | if (data->alarms & 0x04) | |
51f2cca1 | 697 | smsc47m1_write_value(data, |
8eccbb6f JD |
698 | SMSC47M2_REG_ALARM6, |
699 | 0x40); | |
700 | } | |
701 | ||
1da177e4 LT |
702 | data->last_updated = jiffies; |
703 | } | |
704 | ||
9a61bf63 | 705 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
706 | return data; |
707 | } | |
708 | ||
51f2cca1 JD |
709 | static int __init smsc47m1_device_add(unsigned short address, |
710 | const struct smsc47m1_sio_data *sio_data) | |
711 | { | |
712 | struct resource res = { | |
713 | .start = address, | |
714 | .end = address + SMSC_EXTENT - 1, | |
715 | .name = DRVNAME, | |
716 | .flags = IORESOURCE_IO, | |
717 | }; | |
718 | int err; | |
719 | ||
b9acb64a JD |
720 | err = acpi_check_resource_conflict(&res); |
721 | if (err) | |
722 | goto exit; | |
723 | ||
51f2cca1 JD |
724 | pdev = platform_device_alloc(DRVNAME, address); |
725 | if (!pdev) { | |
726 | err = -ENOMEM; | |
727 | printk(KERN_ERR DRVNAME ": Device allocation failed\n"); | |
728 | goto exit; | |
729 | } | |
730 | ||
731 | err = platform_device_add_resources(pdev, &res, 1); | |
732 | if (err) { | |
733 | printk(KERN_ERR DRVNAME ": Device resource addition failed " | |
734 | "(%d)\n", err); | |
735 | goto exit_device_put; | |
736 | } | |
737 | ||
2df6d811 JD |
738 | err = platform_device_add_data(pdev, sio_data, |
739 | sizeof(struct smsc47m1_sio_data)); | |
740 | if (err) { | |
51f2cca1 JD |
741 | printk(KERN_ERR DRVNAME ": Platform data allocation failed\n"); |
742 | goto exit_device_put; | |
743 | } | |
51f2cca1 JD |
744 | |
745 | err = platform_device_add(pdev); | |
746 | if (err) { | |
747 | printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", | |
748 | err); | |
749 | goto exit_device_put; | |
750 | } | |
751 | ||
752 | return 0; | |
753 | ||
754 | exit_device_put: | |
755 | platform_device_put(pdev); | |
756 | exit: | |
757 | return err; | |
758 | } | |
759 | ||
1da177e4 LT |
760 | static int __init sm_smsc47m1_init(void) |
761 | { | |
51f2cca1 JD |
762 | int err; |
763 | unsigned short address; | |
764 | struct smsc47m1_sio_data sio_data; | |
765 | ||
766 | if (smsc47m1_find(&address, &sio_data)) | |
1da177e4 | 767 | return -ENODEV; |
1da177e4 | 768 | |
51f2cca1 JD |
769 | err = platform_driver_register(&smsc47m1_driver); |
770 | if (err) | |
771 | goto exit; | |
772 | ||
773 | /* Sets global pdev as a side effect */ | |
774 | err = smsc47m1_device_add(address, &sio_data); | |
775 | if (err) | |
776 | goto exit_driver; | |
777 | ||
778 | return 0; | |
779 | ||
780 | exit_driver: | |
781 | platform_driver_unregister(&smsc47m1_driver); | |
782 | exit: | |
783 | return err; | |
1da177e4 LT |
784 | } |
785 | ||
786 | static void __exit sm_smsc47m1_exit(void) | |
787 | { | |
51f2cca1 JD |
788 | platform_device_unregister(pdev); |
789 | platform_driver_unregister(&smsc47m1_driver); | |
1da177e4 LT |
790 | } |
791 | ||
792 | MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>"); | |
793 | MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver"); | |
794 | MODULE_LICENSE("GPL"); | |
795 | ||
796 | module_init(sm_smsc47m1_init); | |
797 | module_exit(sm_smsc47m1_exit); |