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tuntap: switch to use rtnl_dereference()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / hwmon / pc87427.c
blob6086ad039d7d3e4968a26943315ebf6683e10a51
1 /*
2 * pc87427.c - hardware monitoring driver for the
3 * National Semiconductor PC87427 Super-I/O chip
4 * Copyright (C) 2006, 2008, 2010 Jean Delvare <khali@linux-fr.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * Supports the following chips:
16 *
17 * Chip #vin #fan #pwm #temp devid
18 * PC87427 - 8 4 6 0xF2
19 *
20 * This driver assumes that no more than one chip is present.
21 * Only fans are fully supported so far. Temperatures are in read-only
22 * mode, and voltages aren't supported at all.
23 */
24
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/jiffies.h>
31 #include <linux/platform_device.h>
32 #include <linux/hwmon.h>
33 #include <linux/hwmon-sysfs.h>
34 #include <linux/err.h>
35 #include <linux/mutex.h>
36 #include <linux/sysfs.h>
37 #include <linux/ioport.h>
38 #include <linux/acpi.h>
39 #include <linux/io.h>
40
41 static unsigned short force_id;
42 module_param(force_id, ushort, 0);
43 MODULE_PARM_DESC(force_id, "Override the detected device ID");
44
45 static struct platform_device *pdev;
46
47 #define DRVNAME "pc87427"
48
49 /*
50 * The lock mutex protects both the I/O accesses (needed because the
51 * device is using banked registers) and the register cache (needed to keep
52 * the data in the registers and the cache in sync at any time).
53 */
54 struct pc87427_data {
55 struct device *hwmon_dev;
56 struct mutex lock;
57 int address[2];
58 const char *name;
59
60 unsigned long last_updated; /* in jiffies */
61 u8 fan_enabled; /* bit vector */
62 u16 fan[8]; /* register values */
63 u16 fan_min[8]; /* register values */
64 u8 fan_status[8]; /* register values */
65
66 u8 pwm_enabled; /* bit vector */
67 u8 pwm_auto_ok; /* bit vector */
68 u8 pwm_enable[4]; /* register values */
69 u8 pwm[4]; /* register values */
70
71 u8 temp_enabled; /* bit vector */
72 s16 temp[6]; /* register values */
73 s8 temp_min[6]; /* register values */
74 s8 temp_max[6]; /* register values */
75 s8 temp_crit[6]; /* register values */
76 u8 temp_status[6]; /* register values */
77 u8 temp_type[6]; /* register values */
78 };
79
80 struct pc87427_sio_data {
81 unsigned short address[2];
82 u8 has_fanin;
83 u8 has_fanout;
84 };
85
86 /*
87 * Super-I/O registers and operations
88 */
89
90 #define SIOREG_LDSEL 0x07 /* Logical device select */
91 #define SIOREG_DEVID 0x20 /* Device ID */
92 #define SIOREG_CF2 0x22 /* Configuration 2 */
93 #define SIOREG_CF3 0x23 /* Configuration 3 */
94 #define SIOREG_CF4 0x24 /* Configuration 4 */
95 #define SIOREG_CF5 0x25 /* Configuration 5 */
96 #define SIOREG_CFB 0x2B /* Configuration B */
97 #define SIOREG_CFC 0x2C /* Configuration C */
98 #define SIOREG_CFD 0x2D /* Configuration D */
99 #define SIOREG_ACT 0x30 /* Device activation */
100 #define SIOREG_MAP 0x50 /* I/O or memory mapping */
101 #define SIOREG_IOBASE 0x60 /* I/O base address */
102
103 static const u8 logdev[2] = { 0x09, 0x14 };
104 static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
105 #define LD_FAN 0
106 #define LD_IN 1
107 #define LD_TEMP 1
108
109 static inline void superio_outb(int sioaddr, int reg, int val)
110 {
111 outb(reg, sioaddr);
112 outb(val, sioaddr + 1);
113 }
114
115 static inline int superio_inb(int sioaddr, int reg)
116 {
117 outb(reg, sioaddr);
118 return inb(sioaddr + 1);
119 }
120
121 static inline void superio_exit(int sioaddr)
122 {
123 outb(0x02, sioaddr);
124 outb(0x02, sioaddr + 1);
125 }
126
127 /*
128 * Logical devices
129 */
130
131 #define REGION_LENGTH 32
132 #define PC87427_REG_BANK 0x0f
133 #define BANK_FM(nr) (nr)
134 #define BANK_FT(nr) (0x08 + (nr))
135 #define BANK_FC(nr) (0x10 + (nr) * 2)
136 #define BANK_TM(nr) (nr)
137 #define BANK_VM(nr) (0x08 + (nr))
138
139 /*
140 * I/O access functions
141 */
142
143 /* ldi is the logical device index */
144 static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)
145 {
146 return inb(data->address[ldi] + reg);
147 }
148
149 /* Must be called with data->lock held, except during init */
150 static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,
151 u8 bank, u8 reg)
152 {
153 outb(bank, data->address[ldi] + PC87427_REG_BANK);
154 return inb(data->address[ldi] + reg);
155 }
156
157 /* Must be called with data->lock held, except during init */
158 static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,
159 u8 bank, u8 reg, u8 value)
160 {
161 outb(bank, data->address[ldi] + PC87427_REG_BANK);
162 outb(value, data->address[ldi] + reg);
163 }
164
165 /*
166 * Fan registers and conversions
167 */
168
169 /* fan data registers are 16-bit wide */
170 #define PC87427_REG_FAN 0x12
171 #define PC87427_REG_FAN_MIN 0x14
172 #define PC87427_REG_FAN_STATUS 0x10
173
174 #define FAN_STATUS_STALL (1 << 3)
175 #define FAN_STATUS_LOSPD (1 << 1)
176 #define FAN_STATUS_MONEN (1 << 0)
177
178 /*
179 * Dedicated function to read all registers related to a given fan input.
180 * This saves us quite a few locks and bank selections.
181 * Must be called with data->lock held.
182 * nr is from 0 to 7
183 */
184 static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
185 {
186 int iobase = data->address[LD_FAN];
187
188 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
189 data->fan[nr] = inw(iobase + PC87427_REG_FAN);
190 data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);
191 data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);
192 /* Clear fan alarm bits */
193 outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);
194 }
195
196 /*
197 * The 2 LSB of fan speed registers are used for something different.
198 * The actual 2 LSB of the measurements are not available.
199 */
200 static inline unsigned long fan_from_reg(u16 reg)
201 {
202 reg &= 0xfffc;
203 if (reg == 0x0000 || reg == 0xfffc)
204 return 0;
205 return 5400000UL / reg;
206 }
207
208 /* The 2 LSB of the fan speed limit registers are not significant. */
209 static inline u16 fan_to_reg(unsigned long val)
210 {
211 if (val < 83UL)
212 return 0xffff;
213 if (val >= 1350000UL)
214 return 0x0004;
215 return ((1350000UL + val / 2) / val) << 2;
216 }
217
218 /*
219 * PWM registers and conversions
220 */
221
222 #define PC87427_REG_PWM_ENABLE 0x10
223 #define PC87427_REG_PWM_DUTY 0x12
224
225 #define PWM_ENABLE_MODE_MASK (7 << 4)
226 #define PWM_ENABLE_CTLEN (1 << 0)
227
228 #define PWM_MODE_MANUAL (0 << 4)
229 #define PWM_MODE_AUTO (1 << 4)
230 #define PWM_MODE_OFF (2 << 4)
231 #define PWM_MODE_ON (7 << 4)
232
233 /*
234 * Dedicated function to read all registers related to a given PWM output.
235 * This saves us quite a few locks and bank selections.
236 * Must be called with data->lock held.
237 * nr is from 0 to 3
238 */
239 static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr)
240 {
241 int iobase = data->address[LD_FAN];
242
243 outb(BANK_FC(nr), iobase + PC87427_REG_BANK);
244 data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE);
245 data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY);
246 }
247
248 static inline int pwm_enable_from_reg(u8 reg)
249 {
250 switch (reg & PWM_ENABLE_MODE_MASK) {
251 case PWM_MODE_ON:
252 return 0;
253 case PWM_MODE_MANUAL:
254 case PWM_MODE_OFF:
255 return 1;
256 case PWM_MODE_AUTO:
257 return 2;
258 default:
259 return -EPROTO;
260 }
261 }
262
263 static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval)
264 {
265 switch (val) {
266 default:
267 return PWM_MODE_ON;
268 case 1:
269 return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF;
270 case 2:
271 return PWM_MODE_AUTO;
272 }
273 }
274
275 /*
276 * Temperature registers and conversions
277 */
278
279 #define PC87427_REG_TEMP_STATUS 0x10
280 #define PC87427_REG_TEMP 0x14
281 #define PC87427_REG_TEMP_MAX 0x18
282 #define PC87427_REG_TEMP_MIN 0x19
283 #define PC87427_REG_TEMP_CRIT 0x1a
284 #define PC87427_REG_TEMP_TYPE 0x1d
285
286 #define TEMP_STATUS_CHANEN (1 << 0)
287 #define TEMP_STATUS_LOWFLG (1 << 1)
288 #define TEMP_STATUS_HIGHFLG (1 << 2)
289 #define TEMP_STATUS_CRITFLG (1 << 3)
290 #define TEMP_STATUS_SENSERR (1 << 5)
291 #define TEMP_TYPE_MASK (3 << 5)
292
293 #define TEMP_TYPE_THERMISTOR (1 << 5)
294 #define TEMP_TYPE_REMOTE_DIODE (2 << 5)
295 #define TEMP_TYPE_LOCAL_DIODE (3 << 5)
296
297 /*
298 * Dedicated function to read all registers related to a given temperature
299 * input. This saves us quite a few locks and bank selections.
300 * Must be called with data->lock held.
301 * nr is from 0 to 5
302 */
303 static void pc87427_readall_temp(struct pc87427_data *data, u8 nr)
304 {
305 int iobase = data->address[LD_TEMP];
306
307 outb(BANK_TM(nr), iobase + PC87427_REG_BANK);
308 data->temp[nr] = le16_to_cpu(inw(iobase + PC87427_REG_TEMP));
309 data->temp_max[nr] = inb(iobase + PC87427_REG_TEMP_MAX);
310 data->temp_min[nr] = inb(iobase + PC87427_REG_TEMP_MIN);
311 data->temp_crit[nr] = inb(iobase + PC87427_REG_TEMP_CRIT);
312 data->temp_type[nr] = inb(iobase + PC87427_REG_TEMP_TYPE);
313 data->temp_status[nr] = inb(iobase + PC87427_REG_TEMP_STATUS);
314 /* Clear fan alarm bits */
315 outb(data->temp_status[nr], iobase + PC87427_REG_TEMP_STATUS);
316 }
317
318 static inline unsigned int temp_type_from_reg(u8 reg)
319 {
320 switch (reg & TEMP_TYPE_MASK) {
321 case TEMP_TYPE_THERMISTOR:
322 return 4;
323 case TEMP_TYPE_REMOTE_DIODE:
324 case TEMP_TYPE_LOCAL_DIODE:
325 return 3;
326 default:
327 return 0;
328 }
329 }
330
331 /*
332 * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible
333 * too, but I have no idea how to figure out when they are used.
334 */
335 static inline long temp_from_reg(s16 reg)
336 {
337 return reg * 1000 / 256;
338 }
339
340 static inline long temp_from_reg8(s8 reg)
341 {
342 return reg * 1000;
343 }
344
345 /*
346 * Data interface
347 */
348
349 static struct pc87427_data *pc87427_update_device(struct device *dev)
350 {
351 struct pc87427_data *data = dev_get_drvdata(dev);
352 int i;
353
354 mutex_lock(&data->lock);
355 if (!time_after(jiffies, data->last_updated + HZ)
356 && data->last_updated)
357 goto done;
358
359 /* Fans */
360 for (i = 0; i < 8; i++) {
361 if (!(data->fan_enabled & (1 << i)))
362 continue;
363 pc87427_readall_fan(data, i);
364 }
365
366 /* PWM outputs */
367 for (i = 0; i < 4; i++) {
368 if (!(data->pwm_enabled & (1 << i)))
369 continue;
370 pc87427_readall_pwm(data, i);
371 }
372
373 /* Temperature channels */
374 for (i = 0; i < 6; i++) {
375 if (!(data->temp_enabled & (1 << i)))
376 continue;
377 pc87427_readall_temp(data, i);
378 }
379
380 data->last_updated = jiffies;
381
382 done:
383 mutex_unlock(&data->lock);
384 return data;
385 }
386
387 static ssize_t show_fan_input(struct device *dev, struct device_attribute
388 *devattr, char *buf)
389 {
390 struct pc87427_data *data = pc87427_update_device(dev);
391 int nr = to_sensor_dev_attr(devattr)->index;
392
393 return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));
394 }
395
396 static ssize_t show_fan_min(struct device *dev, struct device_attribute
397 *devattr, char *buf)
398 {
399 struct pc87427_data *data = pc87427_update_device(dev);
400 int nr = to_sensor_dev_attr(devattr)->index;
401
402 return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));
403 }
404
405 static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
406 *devattr, char *buf)
407 {
408 struct pc87427_data *data = pc87427_update_device(dev);
409 int nr = to_sensor_dev_attr(devattr)->index;
410
411 return sprintf(buf, "%d\n", !!(data->fan_status[nr]
412 & FAN_STATUS_LOSPD));
413 }
414
415 static ssize_t show_fan_fault(struct device *dev, struct device_attribute
416 *devattr, char *buf)
417 {
418 struct pc87427_data *data = pc87427_update_device(dev);
419 int nr = to_sensor_dev_attr(devattr)->index;
420
421 return sprintf(buf, "%d\n", !!(data->fan_status[nr]
422 & FAN_STATUS_STALL));
423 }
424
425 static ssize_t set_fan_min(struct device *dev, struct device_attribute
426 *devattr, const char *buf, size_t count)
427 {
428 struct pc87427_data *data = dev_get_drvdata(dev);
429 int nr = to_sensor_dev_attr(devattr)->index;
430 unsigned long val;
431 int iobase = data->address[LD_FAN];
432
433 if (kstrtoul(buf, 10, &val) < 0)
434 return -EINVAL;
435
436 mutex_lock(&data->lock);
437 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
438 /*
439 * The low speed limit registers are read-only while monitoring
440 * is enabled, so we have to disable monitoring, then change the
441 * limit, and finally enable monitoring again.
442 */
443 outb(0, iobase + PC87427_REG_FAN_STATUS);
444 data->fan_min[nr] = fan_to_reg(val);
445 outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
446 outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
447 mutex_unlock(&data->lock);
448
449 return count;
450 }
451
452 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
453 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
454 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2);
455 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3);
456 static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4);
457 static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5);
458 static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6);
459 static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7);
460
461 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
462 show_fan_min, set_fan_min, 0);
463 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
464 show_fan_min, set_fan_min, 1);
465 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO,
466 show_fan_min, set_fan_min, 2);
467 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO,
468 show_fan_min, set_fan_min, 3);
469 static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO,
470 show_fan_min, set_fan_min, 4);
471 static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO,
472 show_fan_min, set_fan_min, 5);
473 static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO,
474 show_fan_min, set_fan_min, 6);
475 static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO,
476 show_fan_min, set_fan_min, 7);
477
478 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0);
479 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1);
480 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2);
481 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3);
482 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4);
483 static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5);
484 static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6);
485 static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7);
486
487 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
488 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
489 static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
490 static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
491 static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4);
492 static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5);
493 static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6);
494 static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7);
495
496 static struct attribute *pc87427_attributes_fan[8][5] = {
497 {
498 &sensor_dev_attr_fan1_input.dev_attr.attr,
499 &sensor_dev_attr_fan1_min.dev_attr.attr,
500 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
501 &sensor_dev_attr_fan1_fault.dev_attr.attr,
502 NULL
503 }, {
504 &sensor_dev_attr_fan2_input.dev_attr.attr,
505 &sensor_dev_attr_fan2_min.dev_attr.attr,
506 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
507 &sensor_dev_attr_fan2_fault.dev_attr.attr,
508 NULL
509 }, {
510 &sensor_dev_attr_fan3_input.dev_attr.attr,
511 &sensor_dev_attr_fan3_min.dev_attr.attr,
512 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
513 &sensor_dev_attr_fan3_fault.dev_attr.attr,
514 NULL
515 }, {
516 &sensor_dev_attr_fan4_input.dev_attr.attr,
517 &sensor_dev_attr_fan4_min.dev_attr.attr,
518 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
519 &sensor_dev_attr_fan4_fault.dev_attr.attr,
520 NULL
521 }, {
522 &sensor_dev_attr_fan5_input.dev_attr.attr,
523 &sensor_dev_attr_fan5_min.dev_attr.attr,
524 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
525 &sensor_dev_attr_fan5_fault.dev_attr.attr,
526 NULL
527 }, {
528 &sensor_dev_attr_fan6_input.dev_attr.attr,
529 &sensor_dev_attr_fan6_min.dev_attr.attr,
530 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
531 &sensor_dev_attr_fan6_fault.dev_attr.attr,
532 NULL
533 }, {
534 &sensor_dev_attr_fan7_input.dev_attr.attr,
535 &sensor_dev_attr_fan7_min.dev_attr.attr,
536 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
537 &sensor_dev_attr_fan7_fault.dev_attr.attr,
538 NULL
539 }, {
540 &sensor_dev_attr_fan8_input.dev_attr.attr,
541 &sensor_dev_attr_fan8_min.dev_attr.attr,
542 &sensor_dev_attr_fan8_alarm.dev_attr.attr,
543 &sensor_dev_attr_fan8_fault.dev_attr.attr,
544 NULL
545 }
546 };
547
548 static const struct attribute_group pc87427_group_fan[8] = {
549 { .attrs = pc87427_attributes_fan[0] },
550 { .attrs = pc87427_attributes_fan[1] },
551 { .attrs = pc87427_attributes_fan[2] },
552 { .attrs = pc87427_attributes_fan[3] },
553 { .attrs = pc87427_attributes_fan[4] },
554 { .attrs = pc87427_attributes_fan[5] },
555 { .attrs = pc87427_attributes_fan[6] },
556 { .attrs = pc87427_attributes_fan[7] },
557 };
558
559 /*
560 * Must be called with data->lock held and pc87427_readall_pwm() freshly
561 * called
562 */
563 static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
564 {
565 int iobase = data->address[LD_FAN];
566 data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;
567 data->pwm_enable[nr] |= mode;
568 outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);
569 }
570
571 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
572 *devattr, char *buf)
573 {
574 struct pc87427_data *data = pc87427_update_device(dev);
575 int nr = to_sensor_dev_attr(devattr)->index;
576 int pwm_enable;
577
578 pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);
579 if (pwm_enable < 0)
580 return pwm_enable;
581 return sprintf(buf, "%d\n", pwm_enable);
582 }
583
584 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
585 *devattr, const char *buf, size_t count)
586 {
587 struct pc87427_data *data = dev_get_drvdata(dev);
588 int nr = to_sensor_dev_attr(devattr)->index;
589 unsigned long val;
590
591 if (kstrtoul(buf, 10, &val) < 0 || val > 2)
592 return -EINVAL;
593 /* Can't go to automatic mode if it isn't configured */
594 if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))
595 return -EINVAL;
596
597 mutex_lock(&data->lock);
598 pc87427_readall_pwm(data, nr);
599 update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));
600 mutex_unlock(&data->lock);
601
602 return count;
603 }
604
605 static ssize_t show_pwm(struct device *dev, struct device_attribute
606 *devattr, char *buf)
607 {
608 struct pc87427_data *data = pc87427_update_device(dev);
609 int nr = to_sensor_dev_attr(devattr)->index;
610
611 return sprintf(buf, "%d\n", (int)data->pwm[nr]);
612 }
613
614 static ssize_t set_pwm(struct device *dev, struct device_attribute
615 *devattr, const char *buf, size_t count)
616 {
617 struct pc87427_data *data = dev_get_drvdata(dev);
618 int nr = to_sensor_dev_attr(devattr)->index;
619 unsigned long val;
620 int iobase = data->address[LD_FAN];
621 u8 mode;
622
623 if (kstrtoul(buf, 10, &val) < 0 || val > 0xff)
624 return -EINVAL;
625
626 mutex_lock(&data->lock);
627 pc87427_readall_pwm(data, nr);
628 mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;
629 if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {
630 dev_notice(dev, "Can't set PWM%d duty cycle while not in "
631 "manual mode\n", nr + 1);
632 mutex_unlock(&data->lock);
633 return -EPERM;
634 }
635
636 /* We may have to change the mode */
637 if (mode == PWM_MODE_MANUAL && val == 0) {
638 /* Transition from Manual to Off */
639 update_pwm_enable(data, nr, PWM_MODE_OFF);
640 mode = PWM_MODE_OFF;
641 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
642 "manual", "off");
643 } else if (mode == PWM_MODE_OFF && val != 0) {
644 /* Transition from Off to Manual */
645 update_pwm_enable(data, nr, PWM_MODE_MANUAL);
646 mode = PWM_MODE_MANUAL;
647 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
648 "off", "manual");
649 }
650
651 data->pwm[nr] = val;
652 if (mode == PWM_MODE_MANUAL)
653 outb(val, iobase + PC87427_REG_PWM_DUTY);
654 mutex_unlock(&data->lock);
655
656 return count;
657 }
658
659 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
660 show_pwm_enable, set_pwm_enable, 0);
661 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
662 show_pwm_enable, set_pwm_enable, 1);
663 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
664 show_pwm_enable, set_pwm_enable, 2);
665 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO,
666 show_pwm_enable, set_pwm_enable, 3);
667
668 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
669 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
670 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
671 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
672
673 static struct attribute *pc87427_attributes_pwm[4][3] = {
674 {
675 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
676 &sensor_dev_attr_pwm1.dev_attr.attr,
677 NULL
678 }, {
679 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
680 &sensor_dev_attr_pwm2.dev_attr.attr,
681 NULL
682 }, {
683 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
684 &sensor_dev_attr_pwm3.dev_attr.attr,
685 NULL
686 }, {
687 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
688 &sensor_dev_attr_pwm4.dev_attr.attr,
689 NULL
690 }
691 };
692
693 static const struct attribute_group pc87427_group_pwm[4] = {
694 { .attrs = pc87427_attributes_pwm[0] },
695 { .attrs = pc87427_attributes_pwm[1] },
696 { .attrs = pc87427_attributes_pwm[2] },
697 { .attrs = pc87427_attributes_pwm[3] },
698 };
699
700 static ssize_t show_temp_input(struct device *dev, struct device_attribute
701 *devattr, char *buf)
702 {
703 struct pc87427_data *data = pc87427_update_device(dev);
704 int nr = to_sensor_dev_attr(devattr)->index;
705
706 return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
707 }
708
709 static ssize_t show_temp_min(struct device *dev, struct device_attribute
710 *devattr, char *buf)
711 {
712 struct pc87427_data *data = pc87427_update_device(dev);
713 int nr = to_sensor_dev_attr(devattr)->index;
714
715 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));
716 }
717
718 static ssize_t show_temp_max(struct device *dev, struct device_attribute
719 *devattr, char *buf)
720 {
721 struct pc87427_data *data = pc87427_update_device(dev);
722 int nr = to_sensor_dev_attr(devattr)->index;
723
724 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));
725 }
726
727 static ssize_t show_temp_crit(struct device *dev, struct device_attribute
728 *devattr, char *buf)
729 {
730 struct pc87427_data *data = pc87427_update_device(dev);
731 int nr = to_sensor_dev_attr(devattr)->index;
732
733 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));
734 }
735
736 static ssize_t show_temp_type(struct device *dev, struct device_attribute
737 *devattr, char *buf)
738 {
739 struct pc87427_data *data = pc87427_update_device(dev);
740 int nr = to_sensor_dev_attr(devattr)->index;
741
742 return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));
743 }
744
745 static ssize_t show_temp_min_alarm(struct device *dev, struct device_attribute
746 *devattr, char *buf)
747 {
748 struct pc87427_data *data = pc87427_update_device(dev);
749 int nr = to_sensor_dev_attr(devattr)->index;
750
751 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
752 & TEMP_STATUS_LOWFLG));
753 }
754
755 static ssize_t show_temp_max_alarm(struct device *dev, struct device_attribute
756 *devattr, char *buf)
757 {
758 struct pc87427_data *data = pc87427_update_device(dev);
759 int nr = to_sensor_dev_attr(devattr)->index;
760
761 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
762 & TEMP_STATUS_HIGHFLG));
763 }
764
765 static ssize_t show_temp_crit_alarm(struct device *dev, struct device_attribute
766 *devattr, char *buf)
767 {
768 struct pc87427_data *data = pc87427_update_device(dev);
769 int nr = to_sensor_dev_attr(devattr)->index;
770
771 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
772 & TEMP_STATUS_CRITFLG));
773 }
774
775 static ssize_t show_temp_fault(struct device *dev, struct device_attribute
776 *devattr, char *buf)
777 {
778 struct pc87427_data *data = pc87427_update_device(dev);
779 int nr = to_sensor_dev_attr(devattr)->index;
780
781 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
782 & TEMP_STATUS_SENSERR));
783 }
784
785 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
786 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
787 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2);
788 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3);
789 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4);
790 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5);
791
792 static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp_min, NULL, 0);
793 static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp_min, NULL, 1);
794 static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp_min, NULL, 2);
795 static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO, show_temp_min, NULL, 3);
796 static SENSOR_DEVICE_ATTR(temp5_min, S_IRUGO, show_temp_min, NULL, 4);
797 static SENSOR_DEVICE_ATTR(temp6_min, S_IRUGO, show_temp_min, NULL, 5);
798
799 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
800 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
801 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
802 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
803 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
804 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
805
806 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
807 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
808 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
809 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
810 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
811 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
812
813 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0);
814 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1);
815 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2);
816 static SENSOR_DEVICE_ATTR(temp4_type, S_IRUGO, show_temp_type, NULL, 3);
817 static SENSOR_DEVICE_ATTR(temp5_type, S_IRUGO, show_temp_type, NULL, 4);
818 static SENSOR_DEVICE_ATTR(temp6_type, S_IRUGO, show_temp_type, NULL, 5);
819
820 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
821 show_temp_min_alarm, NULL, 0);
822 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
823 show_temp_min_alarm, NULL, 1);
824 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO,
825 show_temp_min_alarm, NULL, 2);
826 static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO,
827 show_temp_min_alarm, NULL, 3);
828 static SENSOR_DEVICE_ATTR(temp5_min_alarm, S_IRUGO,
829 show_temp_min_alarm, NULL, 4);
830 static SENSOR_DEVICE_ATTR(temp6_min_alarm, S_IRUGO,
831 show_temp_min_alarm, NULL, 5);
832
833 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
834 show_temp_max_alarm, NULL, 0);
835 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
836 show_temp_max_alarm, NULL, 1);
837 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO,
838 show_temp_max_alarm, NULL, 2);
839 static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO,
840 show_temp_max_alarm, NULL, 3);
841 static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO,
842 show_temp_max_alarm, NULL, 4);
843 static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO,
844 show_temp_max_alarm, NULL, 5);
845
846 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
847 show_temp_crit_alarm, NULL, 0);
848 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
849 show_temp_crit_alarm, NULL, 1);
850 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO,
851 show_temp_crit_alarm, NULL, 2);
852 static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO,
853 show_temp_crit_alarm, NULL, 3);
854 static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO,
855 show_temp_crit_alarm, NULL, 4);
856 static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO,
857 show_temp_crit_alarm, NULL, 5);
858
859 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
860 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
861 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
862 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
863 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
864 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
865
866 static struct attribute *pc87427_attributes_temp[6][10] = {
867 {
868 &sensor_dev_attr_temp1_input.dev_attr.attr,
869 &sensor_dev_attr_temp1_min.dev_attr.attr,
870 &sensor_dev_attr_temp1_max.dev_attr.attr,
871 &sensor_dev_attr_temp1_crit.dev_attr.attr,
872 &sensor_dev_attr_temp1_type.dev_attr.attr,
873 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
874 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
875 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
876 &sensor_dev_attr_temp1_fault.dev_attr.attr,
877 NULL
878 }, {
879 &sensor_dev_attr_temp2_input.dev_attr.attr,
880 &sensor_dev_attr_temp2_min.dev_attr.attr,
881 &sensor_dev_attr_temp2_max.dev_attr.attr,
882 &sensor_dev_attr_temp2_crit.dev_attr.attr,
883 &sensor_dev_attr_temp2_type.dev_attr.attr,
884 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
885 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
886 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
887 &sensor_dev_attr_temp2_fault.dev_attr.attr,
888 NULL
889 }, {
890 &sensor_dev_attr_temp3_input.dev_attr.attr,
891 &sensor_dev_attr_temp3_min.dev_attr.attr,
892 &sensor_dev_attr_temp3_max.dev_attr.attr,
893 &sensor_dev_attr_temp3_crit.dev_attr.attr,
894 &sensor_dev_attr_temp3_type.dev_attr.attr,
895 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
896 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
897 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
898 &sensor_dev_attr_temp3_fault.dev_attr.attr,
899 NULL
900 }, {
901 &sensor_dev_attr_temp4_input.dev_attr.attr,
902 &sensor_dev_attr_temp4_min.dev_attr.attr,
903 &sensor_dev_attr_temp4_max.dev_attr.attr,
904 &sensor_dev_attr_temp4_crit.dev_attr.attr,
905 &sensor_dev_attr_temp4_type.dev_attr.attr,
906 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
907 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
908 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
909 &sensor_dev_attr_temp4_fault.dev_attr.attr,
910 NULL
911 }, {
912 &sensor_dev_attr_temp5_input.dev_attr.attr,
913 &sensor_dev_attr_temp5_min.dev_attr.attr,
914 &sensor_dev_attr_temp5_max.dev_attr.attr,
915 &sensor_dev_attr_temp5_crit.dev_attr.attr,
916 &sensor_dev_attr_temp5_type.dev_attr.attr,
917 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
918 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
919 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
920 &sensor_dev_attr_temp5_fault.dev_attr.attr,
921 NULL
922 }, {
923 &sensor_dev_attr_temp6_input.dev_attr.attr,
924 &sensor_dev_attr_temp6_min.dev_attr.attr,
925 &sensor_dev_attr_temp6_max.dev_attr.attr,
926 &sensor_dev_attr_temp6_crit.dev_attr.attr,
927 &sensor_dev_attr_temp6_type.dev_attr.attr,
928 &sensor_dev_attr_temp6_min_alarm.dev_attr.attr,
929 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
930 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
931 &sensor_dev_attr_temp6_fault.dev_attr.attr,
932 NULL
933 }
934 };
935
936 static const struct attribute_group pc87427_group_temp[6] = {
937 { .attrs = pc87427_attributes_temp[0] },
938 { .attrs = pc87427_attributes_temp[1] },
939 { .attrs = pc87427_attributes_temp[2] },
940 { .attrs = pc87427_attributes_temp[3] },
941 { .attrs = pc87427_attributes_temp[4] },
942 { .attrs = pc87427_attributes_temp[5] },
943 };
944
945 static ssize_t show_name(struct device *dev, struct device_attribute
946 *devattr, char *buf)
947 {
948 struct pc87427_data *data = dev_get_drvdata(dev);
949
950 return sprintf(buf, "%s\n", data->name);
951 }
952 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
953
954
955 /*
956 * Device detection, attach and detach
957 */
958
959 static int pc87427_request_regions(struct platform_device *pdev,
960 int count)
961 {
962 struct resource *res;
963 int i;
964
965 for (i = 0; i < count; i++) {
966 res = platform_get_resource(pdev, IORESOURCE_IO, i);
967 if (!res) {
968 dev_err(&pdev->dev, "Missing resource #%d\n", i);
969 return -ENOENT;
970 }
971 if (!devm_request_region(&pdev->dev, res->start,
972 resource_size(res), DRVNAME)) {
973 dev_err(&pdev->dev,
974 "Failed to request region 0x%lx-0x%lx\n",
975 (unsigned long)res->start,
976 (unsigned long)res->end);
977 return -EBUSY;
978 }
979 }
980 return 0;
981 }
982
983 static void pc87427_init_device(struct device *dev)
984 {
985 struct pc87427_sio_data *sio_data = dev->platform_data;
986 struct pc87427_data *data = dev_get_drvdata(dev);
987 int i;
988 u8 reg;
989
990 /* The FMC module should be ready */
991 reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
992 if (!(reg & 0x80))
993 dev_warn(dev, "%s module not ready!\n", "FMC");
994
995 /* Check which fans are enabled */
996 for (i = 0; i < 8; i++) {
997 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
998 continue;
999 reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
1000 PC87427_REG_FAN_STATUS);
1001 if (reg & FAN_STATUS_MONEN)
1002 data->fan_enabled |= (1 << i);
1003 }
1004
1005 if (!data->fan_enabled) {
1006 dev_dbg(dev, "Enabling monitoring of all fans\n");
1007 for (i = 0; i < 8; i++) {
1008 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
1009 continue;
1010 pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
1011 PC87427_REG_FAN_STATUS,
1012 FAN_STATUS_MONEN);
1013 }
1014 data->fan_enabled = sio_data->has_fanin;
1015 }
1016
1017 /* Check which PWM outputs are enabled */
1018 for (i = 0; i < 4; i++) {
1019 if (!(sio_data->has_fanout & (1 << i))) /* Not wired */
1020 continue;
1021 reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
1022 PC87427_REG_PWM_ENABLE);
1023 if (reg & PWM_ENABLE_CTLEN)
1024 data->pwm_enabled |= (1 << i);
1025
1026 /*
1027 * We don't expose an interface to reconfigure the automatic
1028 * fan control mode, so only allow to return to this mode if
1029 * it was originally set.
1030 */
1031 if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
1032 dev_dbg(dev, "PWM%d is in automatic control mode\n",
1033 i + 1);
1034 data->pwm_auto_ok |= (1 << i);
1035 }
1036 }
1037
1038 /* The HMC module should be ready */
1039 reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);
1040 if (!(reg & 0x80))
1041 dev_warn(dev, "%s module not ready!\n", "HMC");
1042
1043 /* Check which temperature channels are enabled */
1044 for (i = 0; i < 6; i++) {
1045 reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),
1046 PC87427_REG_TEMP_STATUS);
1047 if (reg & TEMP_STATUS_CHANEN)
1048 data->temp_enabled |= (1 << i);
1049 }
1050 }
1051
1052 static void pc87427_remove_files(struct device *dev)
1053 {
1054 struct pc87427_data *data = dev_get_drvdata(dev);
1055 int i;
1056
1057 device_remove_file(dev, &dev_attr_name);
1058 for (i = 0; i < 8; i++) {
1059 if (!(data->fan_enabled & (1 << i)))
1060 continue;
1061 sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);
1062 }
1063 for (i = 0; i < 4; i++) {
1064 if (!(data->pwm_enabled & (1 << i)))
1065 continue;
1066 sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);
1067 }
1068 for (i = 0; i < 6; i++) {
1069 if (!(data->temp_enabled & (1 << i)))
1070 continue;
1071 sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);
1072 }
1073 }
1074
1075 static int pc87427_probe(struct platform_device *pdev)
1076 {
1077 struct pc87427_sio_data *sio_data = pdev->dev.platform_data;
1078 struct pc87427_data *data;
1079 int i, err, res_count;
1080
1081 data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
1082 GFP_KERNEL);
1083 if (!data) {
1084 pr_err("Out of memory\n");
1085 return -ENOMEM;
1086 }
1087
1088 data->address[0] = sio_data->address[0];
1089 data->address[1] = sio_data->address[1];
1090 res_count = (data->address[0] != 0) + (data->address[1] != 0);
1091
1092 err = pc87427_request_regions(pdev, res_count);
1093 if (err)
1094 return err;
1095
1096 mutex_init(&data->lock);
1097 data->name = "pc87427";
1098 platform_set_drvdata(pdev, data);
1099 pc87427_init_device(&pdev->dev);
1100
1101 /* Register sysfs hooks */
1102 err = device_create_file(&pdev->dev, &dev_attr_name);
1103 if (err)
1104 return err;
1105 for (i = 0; i < 8; i++) {
1106 if (!(data->fan_enabled & (1 << i)))
1107 continue;
1108 err = sysfs_create_group(&pdev->dev.kobj,
1109 &pc87427_group_fan[i]);
1110 if (err)
1111 goto exit_remove_files;
1112 }
1113 for (i = 0; i < 4; i++) {
1114 if (!(data->pwm_enabled & (1 << i)))
1115 continue;
1116 err = sysfs_create_group(&pdev->dev.kobj,
1117 &pc87427_group_pwm[i]);
1118 if (err)
1119 goto exit_remove_files;
1120 }
1121 for (i = 0; i < 6; i++) {
1122 if (!(data->temp_enabled & (1 << i)))
1123 continue;
1124 err = sysfs_create_group(&pdev->dev.kobj,
1125 &pc87427_group_temp[i]);
1126 if (err)
1127 goto exit_remove_files;
1128 }
1129
1130 data->hwmon_dev = hwmon_device_register(&pdev->dev);
1131 if (IS_ERR(data->hwmon_dev)) {
1132 err = PTR_ERR(data->hwmon_dev);
1133 dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
1134 goto exit_remove_files;
1135 }
1136
1137 return 0;
1138
1139 exit_remove_files:
1140 pc87427_remove_files(&pdev->dev);
1141 return err;
1142 }
1143
1144 static int pc87427_remove(struct platform_device *pdev)
1145 {
1146 struct pc87427_data *data = platform_get_drvdata(pdev);
1147
1148 hwmon_device_unregister(data->hwmon_dev);
1149 pc87427_remove_files(&pdev->dev);
1150
1151 return 0;
1152 }
1153
1154
1155 static struct platform_driver pc87427_driver = {
1156 .driver = {
1157 .owner = THIS_MODULE,
1158 .name = DRVNAME,
1159 },
1160 .probe = pc87427_probe,
1161 .remove = pc87427_remove,
1162 };
1163
1164 static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
1165 {
1166 struct resource res[2] = {
1167 { .flags = IORESOURCE_IO },
1168 { .flags = IORESOURCE_IO },
1169 };
1170 int err, i, res_count;
1171
1172 res_count = 0;
1173 for (i = 0; i < 2; i++) {
1174 if (!sio_data->address[i])
1175 continue;
1176 res[res_count].start = sio_data->address[i];
1177 res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
1178 res[res_count].name = logdev_str[i];
1179
1180 err = acpi_check_resource_conflict(&res[res_count]);
1181 if (err)
1182 goto exit;
1183
1184 res_count++;
1185 }
1186
1187 pdev = platform_device_alloc(DRVNAME, res[0].start);
1188 if (!pdev) {
1189 err = -ENOMEM;
1190 pr_err("Device allocation failed\n");
1191 goto exit;
1192 }
1193
1194 err = platform_device_add_resources(pdev, res, res_count);
1195 if (err) {
1196 pr_err("Device resource addition failed (%d)\n", err);
1197 goto exit_device_put;
1198 }
1199
1200 err = platform_device_add_data(pdev, sio_data,
1201 sizeof(struct pc87427_sio_data));
1202 if (err) {
1203 pr_err("Platform data allocation failed\n");
1204 goto exit_device_put;
1205 }
1206
1207 err = platform_device_add(pdev);
1208 if (err) {
1209 pr_err("Device addition failed (%d)\n", err);
1210 goto exit_device_put;
1211 }
1212
1213 return 0;
1214
1215 exit_device_put:
1216 platform_device_put(pdev);
1217 exit:
1218 return err;
1219 }
1220
1221 static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
1222 {
1223 u16 val;
1224 u8 cfg, cfg_b;
1225 int i, err = 0;
1226
1227 /* Identify device */
1228 val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
1229 if (val != 0xf2) { /* PC87427 */
1230 err = -ENODEV;
1231 goto exit;
1232 }
1233
1234 for (i = 0; i < 2; i++) {
1235 sio_data->address[i] = 0;
1236 /* Select logical device */
1237 superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
1238
1239 val = superio_inb(sioaddr, SIOREG_ACT);
1240 if (!(val & 0x01)) {
1241 pr_info("Logical device 0x%02x not activated\n",
1242 logdev[i]);
1243 continue;
1244 }
1245
1246 val = superio_inb(sioaddr, SIOREG_MAP);
1247 if (val & 0x01) {
1248 pr_warn("Logical device 0x%02x is memory-mapped, "
1249 "can't use\n", logdev[i]);
1250 continue;
1251 }
1252
1253 val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
1254 | superio_inb(sioaddr, SIOREG_IOBASE + 1);
1255 if (!val) {
1256 pr_info("I/O base address not set for logical device "
1257 "0x%02x\n", logdev[i]);
1258 continue;
1259 }
1260 sio_data->address[i] = val;
1261 }
1262
1263 /* No point in loading the driver if everything is disabled */
1264 if (!sio_data->address[0] && !sio_data->address[1]) {
1265 err = -ENODEV;
1266 goto exit;
1267 }
1268
1269 /* Check which fan inputs are wired */
1270 sio_data->has_fanin = (1 << 2) | (1 << 3); /* FANIN2, FANIN3 */
1271
1272 cfg = superio_inb(sioaddr, SIOREG_CF2);
1273 if (!(cfg & (1 << 3)))
1274 sio_data->has_fanin |= (1 << 0); /* FANIN0 */
1275 if (!(cfg & (1 << 2)))
1276 sio_data->has_fanin |= (1 << 4); /* FANIN4 */
1277
1278 cfg = superio_inb(sioaddr, SIOREG_CFD);
1279 if (!(cfg & (1 << 0)))
1280 sio_data->has_fanin |= (1 << 1); /* FANIN1 */
1281
1282 cfg = superio_inb(sioaddr, SIOREG_CF4);
1283 if (!(cfg & (1 << 0)))
1284 sio_data->has_fanin |= (1 << 7); /* FANIN7 */
1285 cfg_b = superio_inb(sioaddr, SIOREG_CFB);
1286 if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
1287 sio_data->has_fanin |= (1 << 5); /* FANIN5 */
1288 cfg = superio_inb(sioaddr, SIOREG_CF3);
1289 if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
1290 sio_data->has_fanin |= (1 << 6); /* FANIN6 */
1291
1292 /* Check which fan outputs are wired */
1293 sio_data->has_fanout = (1 << 0); /* FANOUT0 */
1294 if (cfg_b & (1 << 0))
1295 sio_data->has_fanout |= (1 << 3); /* FANOUT3 */
1296
1297 cfg = superio_inb(sioaddr, SIOREG_CFC);
1298 if (!(cfg & (1 << 4))) {
1299 if (cfg_b & (1 << 1))
1300 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1301 if (cfg_b & (1 << 2))
1302 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1303 }
1304
1305 /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
1306 cfg = superio_inb(sioaddr, SIOREG_CF5);
1307 if (cfg & (1 << 6))
1308 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1309 if (cfg & (1 << 5))
1310 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1311
1312 exit:
1313 superio_exit(sioaddr);
1314 return err;
1315 }
1316
1317 static int __init pc87427_init(void)
1318 {
1319 int err;
1320 struct pc87427_sio_data sio_data;
1321
1322 if (pc87427_find(0x2e, &sio_data)
1323 && pc87427_find(0x4e, &sio_data))
1324 return -ENODEV;
1325
1326 err = platform_driver_register(&pc87427_driver);
1327 if (err)
1328 goto exit;
1329
1330 /* Sets global pdev as a side effect */
1331 err = pc87427_device_add(&sio_data);
1332 if (err)
1333 goto exit_driver;
1334
1335 return 0;
1336
1337 exit_driver:
1338 platform_driver_unregister(&pc87427_driver);
1339 exit:
1340 return err;
1341 }
1342
1343 static void __exit pc87427_exit(void)
1344 {
1345 platform_device_unregister(pdev);
1346 platform_driver_unregister(&pc87427_driver);
1347 }
1348
1349 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
1350 MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
1351 MODULE_LICENSE("GPL");
1352
1353 module_init(pc87427_init);
1354 module_exit(pc87427_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree