Commit | Line | Data |
---|---|---|
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 | ||
512504e9 JP |
29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
30 | ||
1da177e4 LT |
31 | #include <linux/module.h> |
32 | #include <linux/slab.h> | |
33 | #include <linux/ioport.h> | |
34 | #include <linux/jiffies.h> | |
51f2cca1 | 35 | #include <linux/platform_device.h> |
943b0830 | 36 | #include <linux/hwmon.h> |
e84cfbcb | 37 | #include <linux/hwmon-sysfs.h> |
943b0830 | 38 | #include <linux/err.h> |
1da177e4 | 39 | #include <linux/init.h> |
9a61bf63 | 40 | #include <linux/mutex.h> |
ce8c6ce1 | 41 | #include <linux/sysfs.h> |
b9acb64a | 42 | #include <linux/acpi.h> |
6055fae8 | 43 | #include <linux/io.h> |
1da177e4 | 44 | |
67b671bc JD |
45 | static unsigned short force_id; |
46 | module_param(force_id, ushort, 0); | |
47 | MODULE_PARM_DESC(force_id, "Override the detected device ID"); | |
48 | ||
51f2cca1 JD |
49 | static struct platform_device *pdev; |
50 | ||
51 | #define DRVNAME "smsc47m1" | |
8eccbb6f | 52 | enum chips { smsc47m1, smsc47m2 }; |
1da177e4 LT |
53 | |
54 | /* Super-I/0 registers and commands */ | |
55 | ||
56 | #define REG 0x2e /* The register to read/write */ | |
57 | #define VAL 0x2f /* The value to read/write */ | |
58 | ||
59 | static inline void | |
60 | superio_outb(int reg, int val) | |
61 | { | |
62 | outb(reg, REG); | |
63 | outb(val, VAL); | |
64 | } | |
65 | ||
66 | static inline int | |
67 | superio_inb(int reg) | |
68 | { | |
69 | outb(reg, REG); | |
70 | return inb(VAL); | |
71 | } | |
72 | ||
73 | /* logical device for fans is 0x0A */ | |
74 | #define superio_select() superio_outb(0x07, 0x0A) | |
75 | ||
76 | static inline void | |
77 | superio_enter(void) | |
78 | { | |
79 | outb(0x55, REG); | |
80 | } | |
81 | ||
82 | static inline void | |
83 | superio_exit(void) | |
84 | { | |
85 | outb(0xAA, REG); | |
86 | } | |
87 | ||
88 | #define SUPERIO_REG_ACT 0x30 | |
89 | #define SUPERIO_REG_BASE 0x60 | |
90 | #define SUPERIO_REG_DEVID 0x20 | |
1b54ab45 | 91 | #define SUPERIO_REG_DEVREV 0x21 |
1da177e4 LT |
92 | |
93 | /* Logical device registers */ | |
94 | ||
95 | #define SMSC_EXTENT 0x80 | |
96 | ||
97 | /* nr is 0 or 1 in the macros below */ | |
98 | #define SMSC47M1_REG_ALARM 0x04 | |
99 | #define SMSC47M1_REG_TPIN(nr) (0x34 - (nr)) | |
100 | #define SMSC47M1_REG_PPIN(nr) (0x36 - (nr)) | |
1da177e4 | 101 | #define SMSC47M1_REG_FANDIV 0x58 |
8eccbb6f JD |
102 | |
103 | static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b }; | |
104 | static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c }; | |
105 | static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 }; | |
106 | ||
107 | #define SMSC47M2_REG_ALARM6 0x09 | |
108 | #define SMSC47M2_REG_TPIN1 0x38 | |
109 | #define SMSC47M2_REG_TPIN2 0x37 | |
110 | #define SMSC47M2_REG_TPIN3 0x2d | |
111 | #define SMSC47M2_REG_PPIN3 0x2c | |
112 | #define SMSC47M2_REG_FANDIV3 0x6a | |
1da177e4 LT |
113 | |
114 | #define MIN_FROM_REG(reg,div) ((reg)>=192 ? 0 : \ | |
115 | 983040/((192-(reg))*(div))) | |
116 | #define FAN_FROM_REG(reg,div,preload) ((reg)<=(preload) || (reg)==255 ? 0 : \ | |
117 | 983040/(((reg)-(preload))*(div))) | |
118 | #define DIV_FROM_REG(reg) (1 << (reg)) | |
119 | #define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1) | |
120 | #define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01) | |
121 | #define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E) | |
122 | ||
123 | struct smsc47m1_data { | |
51f2cca1 JD |
124 | unsigned short addr; |
125 | const char *name; | |
8eccbb6f | 126 | enum chips type; |
1beeffe4 | 127 | struct device *hwmon_dev; |
1da177e4 | 128 | |
9a61bf63 | 129 | struct mutex update_lock; |
1da177e4 LT |
130 | unsigned long last_updated; /* In jiffies */ |
131 | ||
8eccbb6f JD |
132 | u8 fan[3]; /* Register value */ |
133 | u8 fan_preload[3]; /* Register value */ | |
134 | u8 fan_div[3]; /* Register encoding, shifted right */ | |
1da177e4 | 135 | u8 alarms; /* Register encoding */ |
8eccbb6f | 136 | u8 pwm[3]; /* Register value (bit 0 is disable) */ |
1da177e4 LT |
137 | }; |
138 | ||
51f2cca1 JD |
139 | struct smsc47m1_sio_data { |
140 | enum chips type; | |
fa0bff02 | 141 | u8 activate; /* Remember initial device state */ |
51f2cca1 | 142 | }; |
1da177e4 | 143 | |
51f2cca1 | 144 | |
3ecf44b3 | 145 | static int __exit smsc47m1_remove(struct platform_device *pdev); |
1da177e4 LT |
146 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, |
147 | int init); | |
148 | ||
51f2cca1 | 149 | static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg) |
94e183fd | 150 | { |
51f2cca1 | 151 | return inb_p(data->addr + reg); |
94e183fd JD |
152 | } |
153 | ||
51f2cca1 | 154 | static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg, |
94e183fd JD |
155 | u8 value) |
156 | { | |
51f2cca1 | 157 | outb_p(value, data->addr + reg); |
94e183fd | 158 | } |
1da177e4 | 159 | |
51f2cca1 | 160 | static struct platform_driver smsc47m1_driver = { |
cdaf7934 | 161 | .driver = { |
87218842 | 162 | .owner = THIS_MODULE, |
51f2cca1 | 163 | .name = DRVNAME, |
cdaf7934 | 164 | }, |
3ecf44b3 | 165 | .remove = __exit_p(smsc47m1_remove), |
1da177e4 LT |
166 | }; |
167 | ||
e84cfbcb JD |
168 | static ssize_t get_fan(struct device *dev, struct device_attribute |
169 | *devattr, char *buf) | |
1da177e4 | 170 | { |
e84cfbcb | 171 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 172 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 173 | int nr = attr->index; |
1da177e4 LT |
174 | /* This chip (stupidly) stops monitoring fan speed if PWM is |
175 | enabled and duty cycle is 0%. This is fine if the monitoring | |
176 | and control concern the same fan, but troublesome if they are | |
177 | not (which could as well happen). */ | |
178 | int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 : | |
179 | FAN_FROM_REG(data->fan[nr], | |
180 | DIV_FROM_REG(data->fan_div[nr]), | |
181 | data->fan_preload[nr]); | |
182 | return sprintf(buf, "%d\n", rpm); | |
183 | } | |
184 | ||
e84cfbcb JD |
185 | static ssize_t get_fan_min(struct device *dev, struct device_attribute |
186 | *devattr, char *buf) | |
1da177e4 | 187 | { |
e84cfbcb | 188 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 189 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 190 | int nr = attr->index; |
1da177e4 LT |
191 | int rpm = MIN_FROM_REG(data->fan_preload[nr], |
192 | DIV_FROM_REG(data->fan_div[nr])); | |
193 | return sprintf(buf, "%d\n", rpm); | |
194 | } | |
195 | ||
e84cfbcb JD |
196 | static ssize_t get_fan_div(struct device *dev, struct device_attribute |
197 | *devattr, char *buf) | |
1da177e4 | 198 | { |
e84cfbcb | 199 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 200 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 201 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
1da177e4 LT |
202 | } |
203 | ||
1f08af7e JD |
204 | static ssize_t get_fan_alarm(struct device *dev, struct device_attribute |
205 | *devattr, char *buf) | |
206 | { | |
207 | int bitnr = to_sensor_dev_attr(devattr)->index; | |
208 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
209 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
210 | } | |
211 | ||
e84cfbcb JD |
212 | static ssize_t get_pwm(struct device *dev, struct device_attribute |
213 | *devattr, char *buf) | |
1da177e4 | 214 | { |
e84cfbcb | 215 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 216 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 217 | return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index])); |
1da177e4 LT |
218 | } |
219 | ||
e84cfbcb JD |
220 | static ssize_t get_pwm_en(struct device *dev, struct device_attribute |
221 | *devattr, char *buf) | |
1da177e4 | 222 | { |
e84cfbcb | 223 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 224 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); |
e84cfbcb | 225 | return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index])); |
1da177e4 LT |
226 | } |
227 | ||
e84cfbcb JD |
228 | static ssize_t get_alarms(struct device *dev, struct device_attribute |
229 | *devattr, char *buf) | |
1da177e4 LT |
230 | { |
231 | struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); | |
232 | return sprintf(buf, "%d\n", data->alarms); | |
233 | } | |
234 | ||
e84cfbcb JD |
235 | static ssize_t set_fan_min(struct device *dev, struct device_attribute |
236 | *devattr, const char *buf, size_t count) | |
1da177e4 | 237 | { |
e84cfbcb | 238 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 239 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 240 | int nr = attr->index; |
1da177e4 LT |
241 | long rpmdiv, val = simple_strtol(buf, NULL, 10); |
242 | ||
9a61bf63 | 243 | mutex_lock(&data->update_lock); |
1da177e4 LT |
244 | rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]); |
245 | ||
246 | if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) { | |
9a61bf63 | 247 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
248 | return -EINVAL; |
249 | } | |
250 | ||
251 | data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv); | |
51f2cca1 | 252 | smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr], |
1da177e4 | 253 | data->fan_preload[nr]); |
9a61bf63 | 254 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
255 | |
256 | return count; | |
257 | } | |
258 | ||
259 | /* Note: we save and restore the fan minimum here, because its value is | |
260 | determined in part by the fan clock divider. This follows the principle | |
d6e05edc | 261 | of least surprise; the user doesn't expect the fan minimum to change just |
1da177e4 | 262 | because the divider changed. */ |
e84cfbcb JD |
263 | static ssize_t set_fan_div(struct device *dev, struct device_attribute |
264 | *devattr, const char *buf, size_t count) | |
1da177e4 | 265 | { |
e84cfbcb | 266 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 267 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 268 | int nr = attr->index; |
1da177e4 LT |
269 | long new_div = simple_strtol(buf, NULL, 10), tmp; |
270 | u8 old_div = DIV_FROM_REG(data->fan_div[nr]); | |
271 | ||
272 | if (new_div == old_div) /* No change */ | |
273 | return count; | |
274 | ||
9a61bf63 | 275 | mutex_lock(&data->update_lock); |
1da177e4 LT |
276 | switch (new_div) { |
277 | case 1: data->fan_div[nr] = 0; break; | |
278 | case 2: data->fan_div[nr] = 1; break; | |
279 | case 4: data->fan_div[nr] = 2; break; | |
280 | case 8: data->fan_div[nr] = 3; break; | |
281 | default: | |
9a61bf63 | 282 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
283 | return -EINVAL; |
284 | } | |
285 | ||
8eccbb6f JD |
286 | switch (nr) { |
287 | case 0: | |
288 | case 1: | |
51f2cca1 | 289 | tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV) |
8eccbb6f JD |
290 | & ~(0x03 << (4 + 2 * nr)); |
291 | tmp |= data->fan_div[nr] << (4 + 2 * nr); | |
51f2cca1 | 292 | smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp); |
8eccbb6f JD |
293 | break; |
294 | case 2: | |
51f2cca1 | 295 | tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF; |
8eccbb6f | 296 | tmp |= data->fan_div[2] << 4; |
51f2cca1 | 297 | smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp); |
8eccbb6f JD |
298 | break; |
299 | } | |
1da177e4 LT |
300 | |
301 | /* Preserve fan min */ | |
302 | tmp = 192 - (old_div * (192 - data->fan_preload[nr]) | |
303 | + new_div / 2) / new_div; | |
304 | data->fan_preload[nr] = SENSORS_LIMIT(tmp, 0, 191); | |
51f2cca1 | 305 | smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr], |
1da177e4 | 306 | data->fan_preload[nr]); |
9a61bf63 | 307 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
308 | |
309 | return count; | |
310 | } | |
311 | ||
e84cfbcb JD |
312 | static ssize_t set_pwm(struct device *dev, struct device_attribute |
313 | *devattr, const char *buf, size_t count) | |
1da177e4 | 314 | { |
e84cfbcb | 315 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 316 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 317 | int nr = attr->index; |
1da177e4 LT |
318 | long val = simple_strtol(buf, NULL, 10); |
319 | ||
320 | if (val < 0 || val > 255) | |
321 | return -EINVAL; | |
322 | ||
9a61bf63 | 323 | mutex_lock(&data->update_lock); |
1da177e4 LT |
324 | data->pwm[nr] &= 0x81; /* Preserve additional bits */ |
325 | data->pwm[nr] |= PWM_TO_REG(val); | |
51f2cca1 | 326 | smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr], |
1da177e4 | 327 | data->pwm[nr]); |
9a61bf63 | 328 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
329 | |
330 | return count; | |
331 | } | |
332 | ||
e84cfbcb JD |
333 | static ssize_t set_pwm_en(struct device *dev, struct device_attribute |
334 | *devattr, const char *buf, size_t count) | |
1da177e4 | 335 | { |
e84cfbcb | 336 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
51f2cca1 | 337 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
e84cfbcb | 338 | int nr = attr->index; |
1da177e4 LT |
339 | long val = simple_strtol(buf, NULL, 10); |
340 | ||
341 | if (val != 0 && val != 1) | |
342 | return -EINVAL; | |
343 | ||
9a61bf63 | 344 | mutex_lock(&data->update_lock); |
1da177e4 LT |
345 | data->pwm[nr] &= 0xFE; /* preserve the other bits */ |
346 | data->pwm[nr] |= !val; | |
51f2cca1 | 347 | smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr], |
1da177e4 | 348 | data->pwm[nr]); |
9a61bf63 | 349 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
350 | |
351 | return count; | |
352 | } | |
353 | ||
354 | #define fan_present(offset) \ | |
e84cfbcb JD |
355 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan, \ |
356 | NULL, offset - 1); \ | |
357 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
358 | get_fan_min, set_fan_min, offset - 1); \ | |
359 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
360 | get_fan_div, set_fan_div, offset - 1); \ | |
1f08af7e JD |
361 | static SENSOR_DEVICE_ATTR(fan##offset##_alarm, S_IRUGO, get_fan_alarm, \ |
362 | NULL, offset - 1); \ | |
e84cfbcb JD |
363 | static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ |
364 | get_pwm, set_pwm, offset - 1); \ | |
365 | static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ | |
366 | get_pwm_en, set_pwm_en, offset - 1) | |
1da177e4 LT |
367 | |
368 | fan_present(1); | |
369 | fan_present(2); | |
8eccbb6f | 370 | fan_present(3); |
1da177e4 LT |
371 | |
372 | static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); | |
373 | ||
51f2cca1 JD |
374 | static ssize_t show_name(struct device *dev, struct device_attribute |
375 | *devattr, char *buf) | |
376 | { | |
377 | struct smsc47m1_data *data = dev_get_drvdata(dev); | |
378 | ||
379 | return sprintf(buf, "%s\n", data->name); | |
380 | } | |
381 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
382 | ||
ce8c6ce1 JD |
383 | /* Almost all sysfs files may or may not be created depending on the chip |
384 | setup so we create them individually. It is still convenient to define a | |
385 | group to remove them all at once. */ | |
386 | static struct attribute *smsc47m1_attributes[] = { | |
e84cfbcb JD |
387 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
388 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
389 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
1f08af7e | 390 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
e84cfbcb JD |
391 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
392 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
393 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
1f08af7e | 394 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
e84cfbcb JD |
395 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
396 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
397 | &sensor_dev_attr_fan3_div.dev_attr.attr, | |
1f08af7e | 398 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, |
e84cfbcb JD |
399 | |
400 | &sensor_dev_attr_pwm1.dev_attr.attr, | |
401 | &sensor_dev_attr_pwm1_enable.dev_attr.attr, | |
402 | &sensor_dev_attr_pwm2.dev_attr.attr, | |
403 | &sensor_dev_attr_pwm2_enable.dev_attr.attr, | |
404 | &sensor_dev_attr_pwm3.dev_attr.attr, | |
405 | &sensor_dev_attr_pwm3_enable.dev_attr.attr, | |
ce8c6ce1 JD |
406 | |
407 | &dev_attr_alarms.attr, | |
51f2cca1 | 408 | &dev_attr_name.attr, |
ce8c6ce1 JD |
409 | NULL |
410 | }; | |
411 | ||
412 | static const struct attribute_group smsc47m1_group = { | |
413 | .attrs = smsc47m1_attributes, | |
414 | }; | |
415 | ||
51f2cca1 JD |
416 | static int __init smsc47m1_find(unsigned short *addr, |
417 | struct smsc47m1_sio_data *sio_data) | |
1da177e4 LT |
418 | { |
419 | u8 val; | |
420 | ||
421 | superio_enter(); | |
67b671bc | 422 | val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID); |
1da177e4 LT |
423 | |
424 | /* | |
6091780e JD |
425 | * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x |
426 | * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control. | |
1da177e4 | 427 | * The LPC47M15x and LPC47M192 chips "with hardware monitoring block" |
ec5ce552 | 428 | * can do much more besides (device id 0x60). |
b890a07f JD |
429 | * The LPC47M997 is undocumented, but seems to be compatible with |
430 | * the LPC47M192, and has the same device id. | |
8eccbb6f JD |
431 | * The LPC47M292 (device id 0x6B) is somewhat compatible, but it |
432 | * supports a 3rd fan, and the pin configuration registers are | |
433 | * unfortunately different. | |
1b54ab45 JD |
434 | * The LPC47M233 has the same device id (0x6B) but is not compatible. |
435 | * We check the high bit of the device revision register to | |
436 | * differentiate them. | |
1da177e4 | 437 | */ |
51f2cca1 | 438 | switch (val) { |
8eccbb6f | 439 | case 0x51: |
512504e9 | 440 | pr_info("Found SMSC LPC47B27x\n"); |
51f2cca1 | 441 | sio_data->type = smsc47m1; |
8eccbb6f JD |
442 | break; |
443 | case 0x59: | |
512504e9 | 444 | pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n"); |
51f2cca1 | 445 | sio_data->type = smsc47m1; |
8eccbb6f JD |
446 | break; |
447 | case 0x5F: | |
512504e9 | 448 | pr_info("Found SMSC LPC47M14x\n"); |
51f2cca1 | 449 | sio_data->type = smsc47m1; |
8eccbb6f JD |
450 | break; |
451 | case 0x60: | |
512504e9 | 452 | pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n"); |
51f2cca1 | 453 | sio_data->type = smsc47m1; |
8eccbb6f JD |
454 | break; |
455 | case 0x6B: | |
1b54ab45 | 456 | if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) { |
512504e9 | 457 | pr_debug("Found SMSC LPC47M233, unsupported\n"); |
1b54ab45 JD |
458 | superio_exit(); |
459 | return -ENODEV; | |
460 | } | |
461 | ||
512504e9 | 462 | pr_info("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); | |
fa0bff02 | 473 | if (*addr == 0) { |
512504e9 | 474 | pr_info("Device address not set, will not use\n"); |
1da177e4 LT |
475 | superio_exit(); |
476 | return -ENODEV; | |
477 | } | |
478 | ||
fa0bff02 JD |
479 | /* Enable only if address is set (needed at least on the |
480 | * Compaq Presario S4000NX) */ | |
481 | sio_data->activate = superio_inb(SUPERIO_REG_ACT); | |
482 | if ((sio_data->activate & 0x01) == 0) { | |
512504e9 | 483 | pr_info("Enabling device\n"); |
fa0bff02 JD |
484 | superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01); |
485 | } | |
486 | ||
1da177e4 LT |
487 | superio_exit(); |
488 | return 0; | |
489 | } | |
490 | ||
fa0bff02 | 491 | /* Restore device to its initial state */ |
a00d643a | 492 | static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data) |
fa0bff02 JD |
493 | { |
494 | if ((sio_data->activate & 0x01) == 0) { | |
495 | superio_enter(); | |
496 | superio_select(); | |
497 | ||
512504e9 | 498 | pr_info("Disabling device\n"); |
fa0bff02 JD |
499 | superio_outb(SUPERIO_REG_ACT, sio_data->activate); |
500 | ||
501 | superio_exit(); | |
502 | } | |
503 | } | |
504 | ||
a0e92d70 JD |
505 | #define CHECK 1 |
506 | #define REQUEST 2 | |
507 | #define RELEASE 3 | |
508 | ||
509 | /* | |
510 | * This function can be used to: | |
511 | * - test for resource conflicts with ACPI | |
512 | * - request the resources | |
513 | * - release the resources | |
514 | * We only allocate the I/O ports we really need, to minimize the risk of | |
515 | * conflicts with ACPI or with other drivers. | |
516 | */ | |
517 | static int smsc47m1_handle_resources(unsigned short address, enum chips type, | |
518 | int action, struct device *dev) | |
519 | { | |
520 | static const u8 ports_m1[] = { | |
521 | /* register, region length */ | |
522 | 0x04, 1, | |
523 | 0x33, 4, | |
524 | 0x56, 7, | |
525 | }; | |
526 | ||
527 | static const u8 ports_m2[] = { | |
528 | /* register, region length */ | |
529 | 0x04, 1, | |
530 | 0x09, 1, | |
531 | 0x2c, 2, | |
532 | 0x35, 4, | |
533 | 0x56, 7, | |
534 | 0x69, 4, | |
535 | }; | |
536 | ||
537 | int i, ports_size, err; | |
538 | const u8 *ports; | |
539 | ||
540 | switch (type) { | |
541 | case smsc47m1: | |
542 | default: | |
543 | ports = ports_m1; | |
544 | ports_size = ARRAY_SIZE(ports_m1); | |
545 | break; | |
546 | case smsc47m2: | |
547 | ports = ports_m2; | |
548 | ports_size = ARRAY_SIZE(ports_m2); | |
549 | break; | |
550 | } | |
551 | ||
552 | for (i = 0; i + 1 < ports_size; i += 2) { | |
553 | unsigned short start = address + ports[i]; | |
554 | unsigned short len = ports[i + 1]; | |
555 | ||
556 | switch (action) { | |
557 | case CHECK: | |
558 | /* Only check for conflicts */ | |
559 | err = acpi_check_region(start, len, DRVNAME); | |
560 | if (err) | |
561 | return err; | |
562 | break; | |
563 | case REQUEST: | |
564 | /* Request the resources */ | |
565 | if (!request_region(start, len, DRVNAME)) { | |
566 | dev_err(dev, "Region 0x%hx-0x%hx already in " | |
567 | "use!\n", start, start + len); | |
568 | ||
569 | /* Undo all requests */ | |
570 | for (i -= 2; i >= 0; i -= 2) | |
571 | release_region(address + ports[i], | |
572 | ports[i + 1]); | |
573 | return -EBUSY; | |
574 | } | |
575 | break; | |
576 | case RELEASE: | |
577 | /* Release the resources */ | |
578 | release_region(start, len); | |
579 | break; | |
580 | } | |
581 | } | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
3ecf44b3 | 586 | static int __init smsc47m1_probe(struct platform_device *pdev) |
1da177e4 | 587 | { |
51f2cca1 JD |
588 | struct device *dev = &pdev->dev; |
589 | struct smsc47m1_sio_data *sio_data = dev->platform_data; | |
1da177e4 | 590 | struct smsc47m1_data *data; |
51f2cca1 | 591 | struct resource *res; |
a0e92d70 | 592 | int err; |
8eccbb6f | 593 | int fan1, fan2, fan3, pwm1, pwm2, pwm3; |
1da177e4 | 594 | |
51f2cca1 JD |
595 | static const char *names[] = { |
596 | "smsc47m1", | |
597 | "smsc47m2", | |
598 | }; | |
599 | ||
600 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
a0e92d70 JD |
601 | err = smsc47m1_handle_resources(res->start, sio_data->type, |
602 | REQUEST, dev); | |
603 | if (err < 0) | |
604 | return err; | |
1da177e4 | 605 | |
ba9c2e8d | 606 | if (!(data = kzalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) { |
1da177e4 LT |
607 | err = -ENOMEM; |
608 | goto error_release; | |
609 | } | |
1da177e4 | 610 | |
51f2cca1 JD |
611 | data->addr = res->start; |
612 | data->type = sio_data->type; | |
613 | data->name = names[sio_data->type]; | |
9a61bf63 | 614 | mutex_init(&data->update_lock); |
51f2cca1 | 615 | platform_set_drvdata(pdev, data); |
1da177e4 LT |
616 | |
617 | /* If no function is properly configured, there's no point in | |
618 | actually registering the chip. */ | |
51f2cca1 | 619 | pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05) |
1da177e4 | 620 | == 0x04; |
51f2cca1 | 621 | pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05) |
1da177e4 | 622 | == 0x04; |
8eccbb6f | 623 | if (data->type == smsc47m2) { |
51f2cca1 | 624 | fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1) |
8eccbb6f | 625 | & 0x0d) == 0x09; |
51f2cca1 | 626 | fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2) |
8eccbb6f | 627 | & 0x0d) == 0x09; |
51f2cca1 | 628 | fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3) |
8eccbb6f | 629 | & 0x0d) == 0x0d; |
51f2cca1 | 630 | pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3) |
8eccbb6f JD |
631 | & 0x0d) == 0x08; |
632 | } else { | |
51f2cca1 | 633 | fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0)) |
8eccbb6f | 634 | & 0x05) == 0x05; |
51f2cca1 | 635 | fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1)) |
8eccbb6f JD |
636 | & 0x05) == 0x05; |
637 | fan3 = 0; | |
638 | pwm3 = 0; | |
639 | } | |
640 | if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) { | |
51f2cca1 | 641 | dev_warn(dev, "Device not configured, will not use\n"); |
1da177e4 LT |
642 | err = -ENODEV; |
643 | goto error_free; | |
644 | } | |
645 | ||
1da177e4 LT |
646 | /* Some values (fan min, clock dividers, pwm registers) may be |
647 | needed before any update is triggered, so we better read them | |
648 | at least once here. We don't usually do it that way, but in | |
649 | this particular case, manually reading 5 registers out of 8 | |
650 | doesn't make much sense and we're better using the existing | |
651 | function. */ | |
51f2cca1 | 652 | smsc47m1_update_device(dev, 1); |
1da177e4 | 653 | |
943b0830 | 654 | /* Register sysfs hooks */ |
1da177e4 | 655 | if (fan1) { |
e84cfbcb JD |
656 | if ((err = device_create_file(dev, |
657 | &sensor_dev_attr_fan1_input.dev_attr)) | |
658 | || (err = device_create_file(dev, | |
659 | &sensor_dev_attr_fan1_min.dev_attr)) | |
660 | || (err = device_create_file(dev, | |
1f08af7e JD |
661 | &sensor_dev_attr_fan1_div.dev_attr)) |
662 | || (err = device_create_file(dev, | |
663 | &sensor_dev_attr_fan1_alarm.dev_attr))) | |
ce8c6ce1 | 664 | goto error_remove_files; |
1da177e4 | 665 | } else |
51f2cca1 | 666 | dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n"); |
1da177e4 LT |
667 | |
668 | if (fan2) { | |
e84cfbcb JD |
669 | if ((err = device_create_file(dev, |
670 | &sensor_dev_attr_fan2_input.dev_attr)) | |
671 | || (err = device_create_file(dev, | |
672 | &sensor_dev_attr_fan2_min.dev_attr)) | |
673 | || (err = device_create_file(dev, | |
1f08af7e JD |
674 | &sensor_dev_attr_fan2_div.dev_attr)) |
675 | || (err = device_create_file(dev, | |
676 | &sensor_dev_attr_fan2_alarm.dev_attr))) | |
ce8c6ce1 | 677 | goto error_remove_files; |
1da177e4 | 678 | } else |
51f2cca1 | 679 | dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n"); |
1da177e4 | 680 | |
8eccbb6f | 681 | if (fan3) { |
e84cfbcb JD |
682 | if ((err = device_create_file(dev, |
683 | &sensor_dev_attr_fan3_input.dev_attr)) | |
684 | || (err = device_create_file(dev, | |
685 | &sensor_dev_attr_fan3_min.dev_attr)) | |
686 | || (err = device_create_file(dev, | |
1f08af7e JD |
687 | &sensor_dev_attr_fan3_div.dev_attr)) |
688 | || (err = device_create_file(dev, | |
689 | &sensor_dev_attr_fan3_alarm.dev_attr))) | |
8eccbb6f | 690 | goto error_remove_files; |
8477d026 | 691 | } else if (data->type == smsc47m2) |
51f2cca1 | 692 | dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n"); |
8eccbb6f | 693 | |
1da177e4 | 694 | if (pwm1) { |
e84cfbcb JD |
695 | if ((err = device_create_file(dev, |
696 | &sensor_dev_attr_pwm1.dev_attr)) | |
697 | || (err = device_create_file(dev, | |
698 | &sensor_dev_attr_pwm1_enable.dev_attr))) | |
ce8c6ce1 | 699 | goto error_remove_files; |
1da177e4 | 700 | } else |
51f2cca1 | 701 | dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n"); |
8eccbb6f | 702 | |
1da177e4 | 703 | if (pwm2) { |
e84cfbcb JD |
704 | if ((err = device_create_file(dev, |
705 | &sensor_dev_attr_pwm2.dev_attr)) | |
706 | || (err = device_create_file(dev, | |
707 | &sensor_dev_attr_pwm2_enable.dev_attr))) | |
ce8c6ce1 | 708 | goto error_remove_files; |
1da177e4 | 709 | } else |
51f2cca1 | 710 | dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n"); |
1da177e4 | 711 | |
8eccbb6f | 712 | if (pwm3) { |
e84cfbcb JD |
713 | if ((err = device_create_file(dev, |
714 | &sensor_dev_attr_pwm3.dev_attr)) | |
715 | || (err = device_create_file(dev, | |
716 | &sensor_dev_attr_pwm3_enable.dev_attr))) | |
8eccbb6f | 717 | goto error_remove_files; |
8477d026 | 718 | } else if (data->type == smsc47m2) |
51f2cca1 | 719 | dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n"); |
8eccbb6f | 720 | |
51f2cca1 | 721 | if ((err = device_create_file(dev, &dev_attr_alarms))) |
ce8c6ce1 | 722 | goto error_remove_files; |
68a50b56 JD |
723 | if ((err = device_create_file(dev, &dev_attr_name))) |
724 | goto error_remove_files; | |
ce8c6ce1 | 725 | |
1beeffe4 TJ |
726 | data->hwmon_dev = hwmon_device_register(dev); |
727 | if (IS_ERR(data->hwmon_dev)) { | |
728 | err = PTR_ERR(data->hwmon_dev); | |
ce8c6ce1 JD |
729 | goto error_remove_files; |
730 | } | |
1da177e4 LT |
731 | |
732 | return 0; | |
733 | ||
ce8c6ce1 | 734 | error_remove_files: |
51f2cca1 | 735 | sysfs_remove_group(&dev->kobj, &smsc47m1_group); |
1da177e4 | 736 | error_free: |
04a6217d | 737 | platform_set_drvdata(pdev, NULL); |
1f57ff89 | 738 | kfree(data); |
1da177e4 | 739 | error_release: |
a0e92d70 | 740 | smsc47m1_handle_resources(res->start, sio_data->type, RELEASE, dev); |
1da177e4 LT |
741 | return err; |
742 | } | |
743 | ||
3ecf44b3 | 744 | static int __exit smsc47m1_remove(struct platform_device *pdev) |
1da177e4 | 745 | { |
51f2cca1 JD |
746 | struct smsc47m1_data *data = platform_get_drvdata(pdev); |
747 | struct resource *res; | |
1da177e4 | 748 | |
1beeffe4 | 749 | hwmon_device_unregister(data->hwmon_dev); |
51f2cca1 | 750 | sysfs_remove_group(&pdev->dev.kobj, &smsc47m1_group); |
1da177e4 | 751 | |
51f2cca1 | 752 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
a0e92d70 | 753 | smsc47m1_handle_resources(res->start, data->type, RELEASE, &pdev->dev); |
04a6217d | 754 | platform_set_drvdata(pdev, NULL); |
943b0830 | 755 | kfree(data); |
1da177e4 LT |
756 | |
757 | return 0; | |
758 | } | |
759 | ||
1da177e4 LT |
760 | static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, |
761 | int init) | |
762 | { | |
51f2cca1 | 763 | struct smsc47m1_data *data = dev_get_drvdata(dev); |
1da177e4 | 764 | |
9a61bf63 | 765 | mutex_lock(&data->update_lock); |
1da177e4 LT |
766 | |
767 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) { | |
8eccbb6f JD |
768 | int i, fan_nr; |
769 | fan_nr = data->type == smsc47m2 ? 3 : 2; | |
1da177e4 | 770 | |
8eccbb6f | 771 | for (i = 0; i < fan_nr; i++) { |
51f2cca1 | 772 | data->fan[i] = smsc47m1_read_value(data, |
8eccbb6f | 773 | SMSC47M1_REG_FAN[i]); |
51f2cca1 | 774 | data->fan_preload[i] = smsc47m1_read_value(data, |
8eccbb6f | 775 | SMSC47M1_REG_FAN_PRELOAD[i]); |
51f2cca1 | 776 | data->pwm[i] = smsc47m1_read_value(data, |
8eccbb6f | 777 | SMSC47M1_REG_PWM[i]); |
1da177e4 LT |
778 | } |
779 | ||
51f2cca1 | 780 | i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV); |
1da177e4 LT |
781 | data->fan_div[0] = (i >> 4) & 0x03; |
782 | data->fan_div[1] = i >> 6; | |
783 | ||
51f2cca1 | 784 | data->alarms = smsc47m1_read_value(data, |
1da177e4 LT |
785 | SMSC47M1_REG_ALARM) >> 6; |
786 | /* Clear alarms if needed */ | |
787 | if (data->alarms) | |
51f2cca1 | 788 | smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0); |
1da177e4 | 789 | |
8eccbb6f | 790 | if (fan_nr >= 3) { |
51f2cca1 | 791 | data->fan_div[2] = (smsc47m1_read_value(data, |
8eccbb6f | 792 | SMSC47M2_REG_FANDIV3) >> 4) & 0x03; |
51f2cca1 | 793 | data->alarms |= (smsc47m1_read_value(data, |
8eccbb6f JD |
794 | SMSC47M2_REG_ALARM6) & 0x40) >> 4; |
795 | /* Clear alarm if needed */ | |
796 | if (data->alarms & 0x04) | |
51f2cca1 | 797 | smsc47m1_write_value(data, |
8eccbb6f JD |
798 | SMSC47M2_REG_ALARM6, |
799 | 0x40); | |
800 | } | |
801 | ||
1da177e4 LT |
802 | data->last_updated = jiffies; |
803 | } | |
804 | ||
9a61bf63 | 805 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
806 | return data; |
807 | } | |
808 | ||
51f2cca1 JD |
809 | static int __init smsc47m1_device_add(unsigned short address, |
810 | const struct smsc47m1_sio_data *sio_data) | |
811 | { | |
812 | struct resource res = { | |
813 | .start = address, | |
814 | .end = address + SMSC_EXTENT - 1, | |
815 | .name = DRVNAME, | |
816 | .flags = IORESOURCE_IO, | |
817 | }; | |
818 | int err; | |
819 | ||
a0e92d70 | 820 | err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL); |
b9acb64a JD |
821 | if (err) |
822 | goto exit; | |
823 | ||
51f2cca1 JD |
824 | pdev = platform_device_alloc(DRVNAME, address); |
825 | if (!pdev) { | |
826 | err = -ENOMEM; | |
512504e9 | 827 | pr_err("Device allocation failed\n"); |
51f2cca1 JD |
828 | goto exit; |
829 | } | |
830 | ||
831 | err = platform_device_add_resources(pdev, &res, 1); | |
832 | if (err) { | |
512504e9 | 833 | pr_err("Device resource addition failed (%d)\n", err); |
51f2cca1 JD |
834 | goto exit_device_put; |
835 | } | |
836 | ||
2df6d811 JD |
837 | err = platform_device_add_data(pdev, sio_data, |
838 | sizeof(struct smsc47m1_sio_data)); | |
839 | if (err) { | |
512504e9 | 840 | pr_err("Platform data allocation failed\n"); |
51f2cca1 JD |
841 | goto exit_device_put; |
842 | } | |
51f2cca1 JD |
843 | |
844 | err = platform_device_add(pdev); | |
845 | if (err) { | |
512504e9 | 846 | pr_err("Device addition failed (%d)\n", err); |
51f2cca1 JD |
847 | goto exit_device_put; |
848 | } | |
849 | ||
850 | return 0; | |
851 | ||
852 | exit_device_put: | |
853 | platform_device_put(pdev); | |
854 | exit: | |
855 | return err; | |
856 | } | |
857 | ||
1da177e4 LT |
858 | static int __init sm_smsc47m1_init(void) |
859 | { | |
51f2cca1 JD |
860 | int err; |
861 | unsigned short address; | |
862 | struct smsc47m1_sio_data sio_data; | |
863 | ||
864 | if (smsc47m1_find(&address, &sio_data)) | |
1da177e4 | 865 | return -ENODEV; |
1da177e4 | 866 | |
3ecf44b3 JD |
867 | /* Sets global pdev as a side effect */ |
868 | err = smsc47m1_device_add(address, &sio_data); | |
51f2cca1 JD |
869 | if (err) |
870 | goto exit; | |
871 | ||
3ecf44b3 | 872 | err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe); |
51f2cca1 | 873 | if (err) |
3ecf44b3 | 874 | goto exit_device; |
51f2cca1 JD |
875 | |
876 | return 0; | |
877 | ||
3ecf44b3 JD |
878 | exit_device: |
879 | platform_device_unregister(pdev); | |
fa0bff02 | 880 | smsc47m1_restore(&sio_data); |
51f2cca1 JD |
881 | exit: |
882 | return err; | |
1da177e4 LT |
883 | } |
884 | ||
885 | static void __exit sm_smsc47m1_exit(void) | |
886 | { | |
51f2cca1 | 887 | platform_driver_unregister(&smsc47m1_driver); |
fa0bff02 | 888 | smsc47m1_restore(pdev->dev.platform_data); |
3ecf44b3 | 889 | platform_device_unregister(pdev); |
1da177e4 LT |
890 | } |
891 | ||
892 | MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>"); | |
893 | MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver"); | |
894 | MODULE_LICENSE("GPL"); | |
895 | ||
896 | module_init(sm_smsc47m1_init); | |
897 | module_exit(sm_smsc47m1_exit); |