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bna: fix interrupts storm caused by erroneous packets
[linux/fpc-iii.git] / drivers / hwmon / pc87427.c
blobcb9fdd37bd0d9c5111a4481255022e4ec26e5d4c
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 <jdelvare@suse.de>
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,
631 "Can't set PWM%d duty cycle while not in manual mode\n",
632 nr + 1);
633 mutex_unlock(&data->lock);
634 return -EPERM;
635 }
636
637 /* We may have to change the mode */
638 if (mode == PWM_MODE_MANUAL && val == 0) {
639 /* Transition from Manual to Off */
640 update_pwm_enable(data, nr, PWM_MODE_OFF);
641 mode = PWM_MODE_OFF;
642 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
643 "manual", "off");
644 } else if (mode == PWM_MODE_OFF && val != 0) {
645 /* Transition from Off to Manual */
646 update_pwm_enable(data, nr, PWM_MODE_MANUAL);
647 mode = PWM_MODE_MANUAL;
648 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
649 "off", "manual");
650 }
651
652 data->pwm[nr] = val;
653 if (mode == PWM_MODE_MANUAL)
654 outb(val, iobase + PC87427_REG_PWM_DUTY);
655 mutex_unlock(&data->lock);
656
657 return count;
658 }
659
660 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
661 show_pwm_enable, set_pwm_enable, 0);
662 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
663 show_pwm_enable, set_pwm_enable, 1);
664 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
665 show_pwm_enable, set_pwm_enable, 2);
666 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO,
667 show_pwm_enable, set_pwm_enable, 3);
668
669 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
670 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
671 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
672 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
673
674 static struct attribute *pc87427_attributes_pwm[4][3] = {
675 {
676 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
677 &sensor_dev_attr_pwm1.dev_attr.attr,
678 NULL
679 }, {
680 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
681 &sensor_dev_attr_pwm2.dev_attr.attr,
682 NULL
683 }, {
684 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
685 &sensor_dev_attr_pwm3.dev_attr.attr,
686 NULL
687 }, {
688 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
689 &sensor_dev_attr_pwm4.dev_attr.attr,
690 NULL
691 }
692 };
693
694 static const struct attribute_group pc87427_group_pwm[4] = {
695 { .attrs = pc87427_attributes_pwm[0] },
696 { .attrs = pc87427_attributes_pwm[1] },
697 { .attrs = pc87427_attributes_pwm[2] },
698 { .attrs = pc87427_attributes_pwm[3] },
699 };
700
701 static ssize_t show_temp_input(struct device *dev, struct device_attribute
702 *devattr, char *buf)
703 {
704 struct pc87427_data *data = pc87427_update_device(dev);
705 int nr = to_sensor_dev_attr(devattr)->index;
706
707 return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
708 }
709
710 static ssize_t show_temp_min(struct device *dev, struct device_attribute
711 *devattr, char *buf)
712 {
713 struct pc87427_data *data = pc87427_update_device(dev);
714 int nr = to_sensor_dev_attr(devattr)->index;
715
716 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));
717 }
718
719 static ssize_t show_temp_max(struct device *dev, struct device_attribute
720 *devattr, char *buf)
721 {
722 struct pc87427_data *data = pc87427_update_device(dev);
723 int nr = to_sensor_dev_attr(devattr)->index;
724
725 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));
726 }
727
728 static ssize_t show_temp_crit(struct device *dev, struct device_attribute
729 *devattr, char *buf)
730 {
731 struct pc87427_data *data = pc87427_update_device(dev);
732 int nr = to_sensor_dev_attr(devattr)->index;
733
734 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));
735 }
736
737 static ssize_t show_temp_type(struct device *dev, struct device_attribute
738 *devattr, char *buf)
739 {
740 struct pc87427_data *data = pc87427_update_device(dev);
741 int nr = to_sensor_dev_attr(devattr)->index;
742
743 return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));
744 }
745
746 static ssize_t show_temp_min_alarm(struct device *dev, struct device_attribute
747 *devattr, char *buf)
748 {
749 struct pc87427_data *data = pc87427_update_device(dev);
750 int nr = to_sensor_dev_attr(devattr)->index;
751
752 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
753 & TEMP_STATUS_LOWFLG));
754 }
755
756 static ssize_t show_temp_max_alarm(struct device *dev, struct device_attribute
757 *devattr, char *buf)
758 {
759 struct pc87427_data *data = pc87427_update_device(dev);
760 int nr = to_sensor_dev_attr(devattr)->index;
761
762 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
763 & TEMP_STATUS_HIGHFLG));
764 }
765
766 static ssize_t show_temp_crit_alarm(struct device *dev, struct device_attribute
767 *devattr, char *buf)
768 {
769 struct pc87427_data *data = pc87427_update_device(dev);
770 int nr = to_sensor_dev_attr(devattr)->index;
771
772 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
773 & TEMP_STATUS_CRITFLG));
774 }
775
776 static ssize_t show_temp_fault(struct device *dev, struct device_attribute
777 *devattr, char *buf)
778 {
779 struct pc87427_data *data = pc87427_update_device(dev);
780 int nr = to_sensor_dev_attr(devattr)->index;
781
782 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
783 & TEMP_STATUS_SENSERR));
784 }
785
786 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
787 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
788 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2);
789 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3);
790 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4);
791 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5);
792
793 static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp_min, NULL, 0);
794 static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp_min, NULL, 1);
795 static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp_min, NULL, 2);
796 static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO, show_temp_min, NULL, 3);
797 static SENSOR_DEVICE_ATTR(temp5_min, S_IRUGO, show_temp_min, NULL, 4);
798 static SENSOR_DEVICE_ATTR(temp6_min, S_IRUGO, show_temp_min, NULL, 5);
799
800 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
801 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
802 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
803 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
804 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
805 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
806
807 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
808 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
809 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
810 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
811 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
812 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
813
814 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0);
815 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1);
816 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2);
817 static SENSOR_DEVICE_ATTR(temp4_type, S_IRUGO, show_temp_type, NULL, 3);
818 static SENSOR_DEVICE_ATTR(temp5_type, S_IRUGO, show_temp_type, NULL, 4);
819 static SENSOR_DEVICE_ATTR(temp6_type, S_IRUGO, show_temp_type, NULL, 5);
820
821 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
822 show_temp_min_alarm, NULL, 0);
823 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
824 show_temp_min_alarm, NULL, 1);
825 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO,
826 show_temp_min_alarm, NULL, 2);
827 static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO,
828 show_temp_min_alarm, NULL, 3);
829 static SENSOR_DEVICE_ATTR(temp5_min_alarm, S_IRUGO,
830 show_temp_min_alarm, NULL, 4);
831 static SENSOR_DEVICE_ATTR(temp6_min_alarm, S_IRUGO,
832 show_temp_min_alarm, NULL, 5);
833
834 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
835 show_temp_max_alarm, NULL, 0);
836 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
837 show_temp_max_alarm, NULL, 1);
838 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO,
839 show_temp_max_alarm, NULL, 2);
840 static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO,
841 show_temp_max_alarm, NULL, 3);
842 static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO,
843 show_temp_max_alarm, NULL, 4);
844 static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO,
845 show_temp_max_alarm, NULL, 5);
846
847 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
848 show_temp_crit_alarm, NULL, 0);
849 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
850 show_temp_crit_alarm, NULL, 1);
851 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO,
852 show_temp_crit_alarm, NULL, 2);
853 static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO,
854 show_temp_crit_alarm, NULL, 3);
855 static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO,
856 show_temp_crit_alarm, NULL, 4);
857 static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO,
858 show_temp_crit_alarm, NULL, 5);
859
860 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
861 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
862 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
863 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
864 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
865 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
866
867 static struct attribute *pc87427_attributes_temp[6][10] = {
868 {
869 &sensor_dev_attr_temp1_input.dev_attr.attr,
870 &sensor_dev_attr_temp1_min.dev_attr.attr,
871 &sensor_dev_attr_temp1_max.dev_attr.attr,
872 &sensor_dev_attr_temp1_crit.dev_attr.attr,
873 &sensor_dev_attr_temp1_type.dev_attr.attr,
874 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
875 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
876 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
877 &sensor_dev_attr_temp1_fault.dev_attr.attr,
878 NULL
879 }, {
880 &sensor_dev_attr_temp2_input.dev_attr.attr,
881 &sensor_dev_attr_temp2_min.dev_attr.attr,
882 &sensor_dev_attr_temp2_max.dev_attr.attr,
883 &sensor_dev_attr_temp2_crit.dev_attr.attr,
884 &sensor_dev_attr_temp2_type.dev_attr.attr,
885 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
886 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
887 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
888 &sensor_dev_attr_temp2_fault.dev_attr.attr,
889 NULL
890 }, {
891 &sensor_dev_attr_temp3_input.dev_attr.attr,
892 &sensor_dev_attr_temp3_min.dev_attr.attr,
893 &sensor_dev_attr_temp3_max.dev_attr.attr,
894 &sensor_dev_attr_temp3_crit.dev_attr.attr,
895 &sensor_dev_attr_temp3_type.dev_attr.attr,
896 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
897 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
898 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
899 &sensor_dev_attr_temp3_fault.dev_attr.attr,
900 NULL
901 }, {
902 &sensor_dev_attr_temp4_input.dev_attr.attr,
903 &sensor_dev_attr_temp4_min.dev_attr.attr,
904 &sensor_dev_attr_temp4_max.dev_attr.attr,
905 &sensor_dev_attr_temp4_crit.dev_attr.attr,
906 &sensor_dev_attr_temp4_type.dev_attr.attr,
907 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
908 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
909 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
910 &sensor_dev_attr_temp4_fault.dev_attr.attr,
911 NULL
912 }, {
913 &sensor_dev_attr_temp5_input.dev_attr.attr,
914 &sensor_dev_attr_temp5_min.dev_attr.attr,
915 &sensor_dev_attr_temp5_max.dev_attr.attr,
916 &sensor_dev_attr_temp5_crit.dev_attr.attr,
917 &sensor_dev_attr_temp5_type.dev_attr.attr,
918 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
919 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
920 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
921 &sensor_dev_attr_temp5_fault.dev_attr.attr,
922 NULL
923 }, {
924 &sensor_dev_attr_temp6_input.dev_attr.attr,
925 &sensor_dev_attr_temp6_min.dev_attr.attr,
926 &sensor_dev_attr_temp6_max.dev_attr.attr,
927 &sensor_dev_attr_temp6_crit.dev_attr.attr,
928 &sensor_dev_attr_temp6_type.dev_attr.attr,
929 &sensor_dev_attr_temp6_min_alarm.dev_attr.attr,
930 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
931 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
932 &sensor_dev_attr_temp6_fault.dev_attr.attr,
933 NULL
934 }
935 };
936
937 static const struct attribute_group pc87427_group_temp[6] = {
938 { .attrs = pc87427_attributes_temp[0] },
939 { .attrs = pc87427_attributes_temp[1] },
940 { .attrs = pc87427_attributes_temp[2] },
941 { .attrs = pc87427_attributes_temp[3] },
942 { .attrs = pc87427_attributes_temp[4] },
943 { .attrs = pc87427_attributes_temp[5] },
944 };
945
946 static ssize_t show_name(struct device *dev, struct device_attribute
947 *devattr, char *buf)
948 {
949 struct pc87427_data *data = dev_get_drvdata(dev);
950
951 return sprintf(buf, "%s\n", data->name);
952 }
953 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
954
955
956 /*
957 * Device detection, attach and detach
958 */
959
960 static int pc87427_request_regions(struct platform_device *pdev,
961 int count)
962 {
963 struct resource *res;
964 int i;
965
966 for (i = 0; i < count; i++) {
967 res = platform_get_resource(pdev, IORESOURCE_IO, i);
968 if (!res) {
969 dev_err(&pdev->dev, "Missing resource #%d\n", i);
970 return -ENOENT;
971 }
972 if (!devm_request_region(&pdev->dev, res->start,
973 resource_size(res), DRVNAME)) {
974 dev_err(&pdev->dev,
975 "Failed to request region 0x%lx-0x%lx\n",
976 (unsigned long)res->start,
977 (unsigned long)res->end);
978 return -EBUSY;
979 }
980 }
981 return 0;
982 }
983
984 static void pc87427_init_device(struct device *dev)
985 {
986 struct pc87427_sio_data *sio_data = dev_get_platdata(dev);
987 struct pc87427_data *data = dev_get_drvdata(dev);
988 int i;
989 u8 reg;
990
991 /* The FMC module should be ready */
992 reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
993 if (!(reg & 0x80))
994 dev_warn(dev, "%s module not ready!\n", "FMC");
995
996 /* Check which fans are enabled */
997 for (i = 0; i < 8; i++) {
998 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
999 continue;
1000 reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
1001 PC87427_REG_FAN_STATUS);
1002 if (reg & FAN_STATUS_MONEN)
1003 data->fan_enabled |= (1 << i);
1004 }
1005
1006 if (!data->fan_enabled) {
1007 dev_dbg(dev, "Enabling monitoring of all fans\n");
1008 for (i = 0; i < 8; i++) {
1009 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
1010 continue;
1011 pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
1012 PC87427_REG_FAN_STATUS,
1013 FAN_STATUS_MONEN);
1014 }
1015 data->fan_enabled = sio_data->has_fanin;
1016 }
1017
1018 /* Check which PWM outputs are enabled */
1019 for (i = 0; i < 4; i++) {
1020 if (!(sio_data->has_fanout & (1 << i))) /* Not wired */
1021 continue;
1022 reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
1023 PC87427_REG_PWM_ENABLE);
1024 if (reg & PWM_ENABLE_CTLEN)
1025 data->pwm_enabled |= (1 << i);
1026
1027 /*
1028 * We don't expose an interface to reconfigure the automatic
1029 * fan control mode, so only allow to return to this mode if
1030 * it was originally set.
1031 */
1032 if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
1033 dev_dbg(dev, "PWM%d is in automatic control mode\n",
1034 i + 1);
1035 data->pwm_auto_ok |= (1 << i);
1036 }
1037 }
1038
1039 /* The HMC module should be ready */
1040 reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);
1041 if (!(reg & 0x80))
1042 dev_warn(dev, "%s module not ready!\n", "HMC");
1043
1044 /* Check which temperature channels are enabled */
1045 for (i = 0; i < 6; i++) {
1046 reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),
1047 PC87427_REG_TEMP_STATUS);
1048 if (reg & TEMP_STATUS_CHANEN)
1049 data->temp_enabled |= (1 << i);
1050 }
1051 }
1052
1053 static void pc87427_remove_files(struct device *dev)
1054 {
1055 struct pc87427_data *data = dev_get_drvdata(dev);
1056 int i;
1057
1058 device_remove_file(dev, &dev_attr_name);
1059 for (i = 0; i < 8; i++) {
1060 if (!(data->fan_enabled & (1 << i)))
1061 continue;
1062 sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);
1063 }
1064 for (i = 0; i < 4; i++) {
1065 if (!(data->pwm_enabled & (1 << i)))
1066 continue;
1067 sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);
1068 }
1069 for (i = 0; i < 6; i++) {
1070 if (!(data->temp_enabled & (1 << i)))
1071 continue;
1072 sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);
1073 }
1074 }
1075
1076 static int pc87427_probe(struct platform_device *pdev)
1077 {
1078 struct pc87427_sio_data *sio_data = dev_get_platdata(&pdev->dev);
1079 struct pc87427_data *data;
1080 int i, err, res_count;
1081
1082 data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
1083 GFP_KERNEL);
1084 if (!data)
1085 return -ENOMEM;
1086
1087 data->address[0] = sio_data->address[0];
1088 data->address[1] = sio_data->address[1];
1089 res_count = (data->address[0] != 0) + (data->address[1] != 0);
1090
1091 err = pc87427_request_regions(pdev, res_count);
1092 if (err)
1093 return err;
1094
1095 mutex_init(&data->lock);
1096 data->name = "pc87427";
1097 platform_set_drvdata(pdev, data);
1098 pc87427_init_device(&pdev->dev);
1099
1100 /* Register sysfs hooks */
1101 err = device_create_file(&pdev->dev, &dev_attr_name);
1102 if (err)
1103 return err;
1104 for (i = 0; i < 8; i++) {
1105 if (!(data->fan_enabled & (1 << i)))
1106 continue;
1107 err = sysfs_create_group(&pdev->dev.kobj,
1108 &pc87427_group_fan[i]);
1109 if (err)
1110 goto exit_remove_files;
1111 }
1112 for (i = 0; i < 4; i++) {
1113 if (!(data->pwm_enabled & (1 << i)))
1114 continue;
1115 err = sysfs_create_group(&pdev->dev.kobj,
1116 &pc87427_group_pwm[i]);
1117 if (err)
1118 goto exit_remove_files;
1119 }
1120 for (i = 0; i < 6; i++) {
1121 if (!(data->temp_enabled & (1 << i)))
1122 continue;
1123 err = sysfs_create_group(&pdev->dev.kobj,
1124 &pc87427_group_temp[i]);
1125 if (err)
1126 goto exit_remove_files;
1127 }
1128
1129 data->hwmon_dev = hwmon_device_register(&pdev->dev);
1130 if (IS_ERR(data->hwmon_dev)) {
1131 err = PTR_ERR(data->hwmon_dev);
1132 dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
1133 goto exit_remove_files;
1134 }
1135
1136 return 0;
1137
1138 exit_remove_files:
1139 pc87427_remove_files(&pdev->dev);
1140 return err;
1141 }
1142
1143 static int pc87427_remove(struct platform_device *pdev)
1144 {
1145 struct pc87427_data *data = platform_get_drvdata(pdev);
1146
1147 hwmon_device_unregister(data->hwmon_dev);
1148 pc87427_remove_files(&pdev->dev);
1149
1150 return 0;
1151 }
1152
1153
1154 static struct platform_driver pc87427_driver = {
1155 .driver = {
1156 .name = DRVNAME,
1157 },
1158 .probe = pc87427_probe,
1159 .remove = pc87427_remove,
1160 };
1161
1162 static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
1163 {
1164 struct resource res[2] = {
1165 { .flags = IORESOURCE_IO },
1166 { .flags = IORESOURCE_IO },
1167 };
1168 int err, i, res_count;
1169
1170 res_count = 0;
1171 for (i = 0; i < 2; i++) {
1172 if (!sio_data->address[i])
1173 continue;
1174 res[res_count].start = sio_data->address[i];
1175 res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
1176 res[res_count].name = logdev_str[i];
1177
1178 err = acpi_check_resource_conflict(&res[res_count]);
1179 if (err)
1180 goto exit;
1181
1182 res_count++;
1183 }
1184
1185 pdev = platform_device_alloc(DRVNAME, res[0].start);
1186 if (!pdev) {
1187 err = -ENOMEM;
1188 pr_err("Device allocation failed\n");
1189 goto exit;
1190 }
1191
1192 err = platform_device_add_resources(pdev, res, res_count);
1193 if (err) {
1194 pr_err("Device resource addition failed (%d)\n", err);
1195 goto exit_device_put;
1196 }
1197
1198 err = platform_device_add_data(pdev, sio_data,
1199 sizeof(struct pc87427_sio_data));
1200 if (err) {
1201 pr_err("Platform data allocation failed\n");
1202 goto exit_device_put;
1203 }
1204
1205 err = platform_device_add(pdev);
1206 if (err) {
1207 pr_err("Device addition failed (%d)\n", err);
1208 goto exit_device_put;
1209 }
1210
1211 return 0;
1212
1213 exit_device_put:
1214 platform_device_put(pdev);
1215 exit:
1216 return err;
1217 }
1218
1219 static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
1220 {
1221 u16 val;
1222 u8 cfg, cfg_b;
1223 int i, err = 0;
1224
1225 /* Identify device */
1226 val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
1227 if (val != 0xf2) { /* PC87427 */
1228 err = -ENODEV;
1229 goto exit;
1230 }
1231
1232 for (i = 0; i < 2; i++) {
1233 sio_data->address[i] = 0;
1234 /* Select logical device */
1235 superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
1236
1237 val = superio_inb(sioaddr, SIOREG_ACT);
1238 if (!(val & 0x01)) {
1239 pr_info("Logical device 0x%02x not activated\n",
1240 logdev[i]);
1241 continue;
1242 }
1243
1244 val = superio_inb(sioaddr, SIOREG_MAP);
1245 if (val & 0x01) {
1246 pr_warn("Logical device 0x%02x is memory-mapped, can't use\n",
1247 logdev[i]);
1248 continue;
1249 }
1250
1251 val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
1252 | superio_inb(sioaddr, SIOREG_IOBASE + 1);
1253 if (!val) {
1254 pr_info("I/O base address not set for logical device 0x%02x\n",
1255 logdev[i]);
1256 continue;
1257 }
1258 sio_data->address[i] = val;
1259 }
1260
1261 /* No point in loading the driver if everything is disabled */
1262 if (!sio_data->address[0] && !sio_data->address[1]) {
1263 err = -ENODEV;
1264 goto exit;
1265 }
1266
1267 /* Check which fan inputs are wired */
1268 sio_data->has_fanin = (1 << 2) | (1 << 3); /* FANIN2, FANIN3 */
1269
1270 cfg = superio_inb(sioaddr, SIOREG_CF2);
1271 if (!(cfg & (1 << 3)))
1272 sio_data->has_fanin |= (1 << 0); /* FANIN0 */
1273 if (!(cfg & (1 << 2)))
1274 sio_data->has_fanin |= (1 << 4); /* FANIN4 */
1275
1276 cfg = superio_inb(sioaddr, SIOREG_CFD);
1277 if (!(cfg & (1 << 0)))
1278 sio_data->has_fanin |= (1 << 1); /* FANIN1 */
1279
1280 cfg = superio_inb(sioaddr, SIOREG_CF4);
1281 if (!(cfg & (1 << 0)))
1282 sio_data->has_fanin |= (1 << 7); /* FANIN7 */
1283 cfg_b = superio_inb(sioaddr, SIOREG_CFB);
1284 if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
1285 sio_data->has_fanin |= (1 << 5); /* FANIN5 */
1286 cfg = superio_inb(sioaddr, SIOREG_CF3);
1287 if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
1288 sio_data->has_fanin |= (1 << 6); /* FANIN6 */
1289
1290 /* Check which fan outputs are wired */
1291 sio_data->has_fanout = (1 << 0); /* FANOUT0 */
1292 if (cfg_b & (1 << 0))
1293 sio_data->has_fanout |= (1 << 3); /* FANOUT3 */
1294
1295 cfg = superio_inb(sioaddr, SIOREG_CFC);
1296 if (!(cfg & (1 << 4))) {
1297 if (cfg_b & (1 << 1))
1298 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1299 if (cfg_b & (1 << 2))
1300 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1301 }
1302
1303 /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
1304 cfg = superio_inb(sioaddr, SIOREG_CF5);
1305 if (cfg & (1 << 6))
1306 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1307 if (cfg & (1 << 5))
1308 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1309
1310 exit:
1311 superio_exit(sioaddr);
1312 return err;
1313 }
1314
1315 static int __init pc87427_init(void)
1316 {
1317 int err;
1318 struct pc87427_sio_data sio_data;
1319
1320 if (pc87427_find(0x2e, &sio_data)
1321 && pc87427_find(0x4e, &sio_data))
1322 return -ENODEV;
1323
1324 err = platform_driver_register(&pc87427_driver);
1325 if (err)
1326 goto exit;
1327
1328 /* Sets global pdev as a side effect */
1329 err = pc87427_device_add(&sio_data);
1330 if (err)
1331 goto exit_driver;
1332
1333 return 0;
1334
1335 exit_driver:
1336 platform_driver_unregister(&pc87427_driver);
1337 exit:
1338 return err;
1339 }
1340
1341 static void __exit pc87427_exit(void)
1342 {
1343 platform_device_unregister(pdev);
1344 platform_driver_unregister(&pc87427_driver);
1345 }
1346
1347 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1348 MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
1349 MODULE_LICENSE("GPL");
1350
1351 module_init(pc87427_init);
1352 module_exit(pc87427_exit);
Linux with added FPC-III support