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24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/jiffies.h>
28#include <linux/platform_device.h>
29#include <linux/hwmon.h>
30#include <linux/hwmon-sysfs.h>
31#include <linux/err.h>
32#include <linux/mutex.h>
33#include <linux/sysfs.h>
34#include <linux/ioport.h>
35#include <linux/acpi.h>
36#include <asm/io.h>
37
38static unsigned short force_id;
39module_param(force_id, ushort, 0);
40MODULE_PARM_DESC(force_id, "Override the detected device ID");
41
42static struct platform_device *pdev;
43
44#define DRVNAME "pc87427"
45
46
47
48
49struct pc87427_data {
50 struct device *hwmon_dev;
51 struct mutex lock;
52 int address[2];
53 const char *name;
54
55 unsigned long last_updated;
56 u8 fan_enabled;
57 u16 fan[8];
58 u16 fan_min[8];
59 u8 fan_status[8];
60};
61
62
63
64
65
66#define SIOREG_LDSEL 0x07
67#define SIOREG_DEVID 0x20
68#define SIOREG_ACT 0x30
69#define SIOREG_MAP 0x50
70#define SIOREG_IOBASE 0x60
71
72static const u8 logdev[2] = { 0x09, 0x14 };
73static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
74#define LD_FAN 0
75#define LD_IN 1
76#define LD_TEMP 1
77
78static inline void superio_outb(int sioaddr, int reg, int val)
79{
80 outb(reg, sioaddr);
81 outb(val, sioaddr + 1);
82}
83
84static inline int superio_inb(int sioaddr, int reg)
85{
86 outb(reg, sioaddr);
87 return inb(sioaddr + 1);
88}
89
90static inline void superio_exit(int sioaddr)
91{
92 outb(0x02, sioaddr);
93 outb(0x02, sioaddr + 1);
94}
95
96
97
98
99
100#define REGION_LENGTH 32
101#define PC87427_REG_BANK 0x0f
102#define BANK_FM(nr) (nr)
103#define BANK_FT(nr) (0x08 + (nr))
104#define BANK_FC(nr) (0x10 + (nr) * 2)
105
106
107
108
109
110
111static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)
112{
113 return inb(data->address[ldi] + reg);
114}
115
116
117static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,
118 u8 bank, u8 reg)
119{
120 outb(bank, data->address[ldi] + PC87427_REG_BANK);
121 return inb(data->address[ldi] + reg);
122}
123
124
125static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,
126 u8 bank, u8 reg, u8 value)
127{
128 outb(bank, data->address[ldi] + PC87427_REG_BANK);
129 outb(value, data->address[ldi] + reg);
130}
131
132
133
134
135
136
137#define PC87427_REG_FAN 0x12
138#define PC87427_REG_FAN_MIN 0x14
139#define PC87427_REG_FAN_STATUS 0x10
140
141#define FAN_STATUS_STALL (1 << 3)
142#define FAN_STATUS_LOSPD (1 << 1)
143#define FAN_STATUS_MONEN (1 << 0)
144
145
146
147
148
149static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
150{
151 int iobase = data->address[LD_FAN];
152
153 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
154 data->fan[nr] = inw(iobase + PC87427_REG_FAN);
155 data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);
156 data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);
157
158 outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);
159}
160
161
162
163static inline unsigned long fan_from_reg(u16 reg)
164{
165 reg &= 0xfffc;
166 if (reg == 0x0000 || reg == 0xfffc)
167 return 0;
168 return 5400000UL / reg;
169}
170
171
172static inline u16 fan_to_reg(unsigned long val)
173{
174 if (val < 83UL)
175 return 0xffff;
176 if (val >= 1350000UL)
177 return 0x0004;
178 return ((1350000UL + val / 2) / val) << 2;
179}
180
181
182
183
184
185static struct pc87427_data *pc87427_update_device(struct device *dev)
186{
187 struct pc87427_data *data = dev_get_drvdata(dev);
188 int i;
189
190 mutex_lock(&data->lock);
191 if (!time_after(jiffies, data->last_updated + HZ)
192 && data->last_updated)
193 goto done;
194
195
196 for (i = 0; i < 8; i++) {
197 if (!(data->fan_enabled & (1 << i)))
198 continue;
199 pc87427_readall_fan(data, i);
200 }
201 data->last_updated = jiffies;
202
203done:
204 mutex_unlock(&data->lock);
205 return data;
206}
207
208static ssize_t show_fan_input(struct device *dev, struct device_attribute
209 *devattr, char *buf)
210{
211 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
212 struct pc87427_data *data = pc87427_update_device(dev);
213 int nr = attr->index;
214
215 return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));
216}
217
218static ssize_t show_fan_min(struct device *dev, struct device_attribute
219 *devattr, char *buf)
220{
221 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
222 struct pc87427_data *data = pc87427_update_device(dev);
223 int nr = attr->index;
224
225 return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));
226}
227
228static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
229 *devattr, char *buf)
230{
231 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
232 struct pc87427_data *data = pc87427_update_device(dev);
233 int nr = attr->index;
234
235 return sprintf(buf, "%d\n", !!(data->fan_status[nr]
236 & FAN_STATUS_LOSPD));
237}
238
239static ssize_t show_fan_fault(struct device *dev, struct device_attribute
240 *devattr, char *buf)
241{
242 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
243 struct pc87427_data *data = pc87427_update_device(dev);
244 int nr = attr->index;
245
246 return sprintf(buf, "%d\n", !!(data->fan_status[nr]
247 & FAN_STATUS_STALL));
248}
249
250static ssize_t set_fan_min(struct device *dev, struct device_attribute
251 *devattr, const char *buf, size_t count)
252{
253 struct pc87427_data *data = dev_get_drvdata(dev);
254 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
255 int nr = attr->index;
256 unsigned long val = simple_strtoul(buf, NULL, 10);
257 int iobase = data->address[LD_FAN];
258
259 mutex_lock(&data->lock);
260 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
261
262
263
264 outb(0, iobase + PC87427_REG_FAN_STATUS);
265 data->fan_min[nr] = fan_to_reg(val);
266 outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
267 outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
268 mutex_unlock(&data->lock);
269
270 return count;
271}
272
273static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
274static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
275static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2);
276static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3);
277static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4);
278static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5);
279static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6);
280static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7);
281
282static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
283 show_fan_min, set_fan_min, 0);
284static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
285 show_fan_min, set_fan_min, 1);
286static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO,
287 show_fan_min, set_fan_min, 2);
288static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO,
289 show_fan_min, set_fan_min, 3);
290static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO,
291 show_fan_min, set_fan_min, 4);
292static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO,
293 show_fan_min, set_fan_min, 5);
294static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO,
295 show_fan_min, set_fan_min, 6);
296static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO,
297 show_fan_min, set_fan_min, 7);
298
299static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0);
300static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1);
301static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2);
302static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3);
303static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4);
304static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5);
305static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6);
306static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7);
307
308static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
309static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
310static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
311static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
312static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4);
313static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5);
314static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6);
315static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7);
316
317static struct attribute *pc87427_attributes_fan[8][5] = {
318 {
319 &sensor_dev_attr_fan1_input.dev_attr.attr,
320 &sensor_dev_attr_fan1_min.dev_attr.attr,
321 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
322 &sensor_dev_attr_fan1_fault.dev_attr.attr,
323 NULL
324 }, {
325 &sensor_dev_attr_fan2_input.dev_attr.attr,
326 &sensor_dev_attr_fan2_min.dev_attr.attr,
327 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
328 &sensor_dev_attr_fan2_fault.dev_attr.attr,
329 NULL
330 }, {
331 &sensor_dev_attr_fan3_input.dev_attr.attr,
332 &sensor_dev_attr_fan3_min.dev_attr.attr,
333 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
334 &sensor_dev_attr_fan3_fault.dev_attr.attr,
335 NULL
336 }, {
337 &sensor_dev_attr_fan4_input.dev_attr.attr,
338 &sensor_dev_attr_fan4_min.dev_attr.attr,
339 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
340 &sensor_dev_attr_fan4_fault.dev_attr.attr,
341 NULL
342 }, {
343 &sensor_dev_attr_fan5_input.dev_attr.attr,
344 &sensor_dev_attr_fan5_min.dev_attr.attr,
345 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
346 &sensor_dev_attr_fan5_fault.dev_attr.attr,
347 NULL
348 }, {
349 &sensor_dev_attr_fan6_input.dev_attr.attr,
350 &sensor_dev_attr_fan6_min.dev_attr.attr,
351 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
352 &sensor_dev_attr_fan6_fault.dev_attr.attr,
353 NULL
354 }, {
355 &sensor_dev_attr_fan7_input.dev_attr.attr,
356 &sensor_dev_attr_fan7_min.dev_attr.attr,
357 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
358 &sensor_dev_attr_fan7_fault.dev_attr.attr,
359 NULL
360 }, {
361 &sensor_dev_attr_fan8_input.dev_attr.attr,
362 &sensor_dev_attr_fan8_min.dev_attr.attr,
363 &sensor_dev_attr_fan8_alarm.dev_attr.attr,
364 &sensor_dev_attr_fan8_fault.dev_attr.attr,
365 NULL
366 }
367};
368
369static const struct attribute_group pc87427_group_fan[8] = {
370 { .attrs = pc87427_attributes_fan[0] },
371 { .attrs = pc87427_attributes_fan[1] },
372 { .attrs = pc87427_attributes_fan[2] },
373 { .attrs = pc87427_attributes_fan[3] },
374 { .attrs = pc87427_attributes_fan[4] },
375 { .attrs = pc87427_attributes_fan[5] },
376 { .attrs = pc87427_attributes_fan[6] },
377 { .attrs = pc87427_attributes_fan[7] },
378};
379
380static ssize_t show_name(struct device *dev, struct device_attribute
381 *devattr, char *buf)
382{
383 struct pc87427_data *data = dev_get_drvdata(dev);
384
385 return sprintf(buf, "%s\n", data->name);
386}
387static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
388
389
390
391
392
393
394static void __devinit pc87427_init_device(struct device *dev)
395{
396 struct pc87427_data *data = dev_get_drvdata(dev);
397 int i;
398 u8 reg;
399
400
401 reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
402 if (!(reg & 0x80))
403 dev_warn(dev, "FMC module not ready!\n");
404
405
406 for (i = 0; i < 8; i++) {
407 reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
408 PC87427_REG_FAN_STATUS);
409 if (reg & FAN_STATUS_MONEN)
410 data->fan_enabled |= (1 << i);
411 }
412
413 if (!data->fan_enabled) {
414 dev_dbg(dev, "Enabling all fan inputs\n");
415 for (i = 0; i < 8; i++)
416 pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
417 PC87427_REG_FAN_STATUS,
418 FAN_STATUS_MONEN);
419 data->fan_enabled = 0xff;
420 }
421}
422
423static int __devinit pc87427_probe(struct platform_device *pdev)
424{
425 struct pc87427_data *data;
426 struct resource *res;
427 int i, err;
428
429 if (!(data = kzalloc(sizeof(struct pc87427_data), GFP_KERNEL))) {
430 err = -ENOMEM;
431 printk(KERN_ERR DRVNAME ": Out of memory\n");
432 goto exit;
433 }
434
435
436
437 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
438 if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) {
439 err = -EBUSY;
440 dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n",
441 (unsigned long)res->start, (unsigned long)res->end);
442 goto exit_kfree;
443 }
444 data->address[0] = res->start;
445
446 mutex_init(&data->lock);
447 data->name = "pc87427";
448 platform_set_drvdata(pdev, data);
449 pc87427_init_device(&pdev->dev);
450
451
452 if ((err = device_create_file(&pdev->dev, &dev_attr_name)))
453 goto exit_release_region;
454 for (i = 0; i < 8; i++) {
455 if (!(data->fan_enabled & (1 << i)))
456 continue;
457 if ((err = sysfs_create_group(&pdev->dev.kobj,
458 &pc87427_group_fan[i])))
459 goto exit_remove_files;
460 }
461
462 data->hwmon_dev = hwmon_device_register(&pdev->dev);
463 if (IS_ERR(data->hwmon_dev)) {
464 err = PTR_ERR(data->hwmon_dev);
465 dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
466 goto exit_remove_files;
467 }
468
469 return 0;
470
471exit_remove_files:
472 for (i = 0; i < 8; i++) {
473 if (!(data->fan_enabled & (1 << i)))
474 continue;
475 sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]);
476 }
477exit_release_region:
478 release_region(res->start, res->end - res->start + 1);
479exit_kfree:
480 platform_set_drvdata(pdev, NULL);
481 kfree(data);
482exit:
483 return err;
484}
485
486static int __devexit pc87427_remove(struct platform_device *pdev)
487{
488 struct pc87427_data *data = platform_get_drvdata(pdev);
489 struct resource *res;
490 int i;
491
492 hwmon_device_unregister(data->hwmon_dev);
493 device_remove_file(&pdev->dev, &dev_attr_name);
494 for (i = 0; i < 8; i++) {
495 if (!(data->fan_enabled & (1 << i)))
496 continue;
497 sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]);
498 }
499 platform_set_drvdata(pdev, NULL);
500 kfree(data);
501
502 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
503 release_region(res->start, res->end - res->start + 1);
504
505 return 0;
506}
507
508
509static struct platform_driver pc87427_driver = {
510 .driver = {
511 .owner = THIS_MODULE,
512 .name = DRVNAME,
513 },
514 .probe = pc87427_probe,
515 .remove = __devexit_p(pc87427_remove),
516};
517
518static int __init pc87427_device_add(unsigned short address)
519{
520 struct resource res = {
521 .start = address,
522 .end = address + REGION_LENGTH - 1,
523 .name = logdev_str[0],
524 .flags = IORESOURCE_IO,
525 };
526 int err;
527
528 err = acpi_check_resource_conflict(&res);
529 if (err)
530 goto exit;
531
532 pdev = platform_device_alloc(DRVNAME, address);
533 if (!pdev) {
534 err = -ENOMEM;
535 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
536 goto exit;
537 }
538
539 err = platform_device_add_resources(pdev, &res, 1);
540 if (err) {
541 printk(KERN_ERR DRVNAME ": Device resource addition failed "
542 "(%d)\n", err);
543 goto exit_device_put;
544 }
545
546 err = platform_device_add(pdev);
547 if (err) {
548 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
549 err);
550 goto exit_device_put;
551 }
552
553 return 0;
554
555exit_device_put:
556 platform_device_put(pdev);
557exit:
558 return err;
559}
560
561static int __init pc87427_find(int sioaddr, unsigned short *address)
562{
563 u16 val;
564 int i, err = 0;
565
566
567 val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
568 if (val != 0xf2) {
569 err = -ENODEV;
570 goto exit;
571 }
572
573 for (i = 0; i < 2; i++) {
574 address[i] = 0;
575
576 superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
577
578 val = superio_inb(sioaddr, SIOREG_ACT);
579 if (!(val & 0x01)) {
580 printk(KERN_INFO DRVNAME ": Logical device 0x%02x "
581 "not activated\n", logdev[i]);
582 continue;
583 }
584
585 val = superio_inb(sioaddr, SIOREG_MAP);
586 if (val & 0x01) {
587 printk(KERN_WARNING DRVNAME ": Logical device 0x%02x "
588 "is memory-mapped, can't use\n", logdev[i]);
589 continue;
590 }
591
592 val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
593 | superio_inb(sioaddr, SIOREG_IOBASE + 1);
594 if (!val) {
595 printk(KERN_INFO DRVNAME ": I/O base address not set "
596 "for logical device 0x%02x\n", logdev[i]);
597 continue;
598 }
599 address[i] = val;
600 }
601
602exit:
603 superio_exit(sioaddr);
604 return err;
605}
606
607static int __init pc87427_init(void)
608{
609 int err;
610 unsigned short address[2];
611
612 if (pc87427_find(0x2e, address)
613 && pc87427_find(0x4e, address))
614 return -ENODEV;
615
616
617
618 if (!address[0])
619 return -ENODEV;
620
621 err = platform_driver_register(&pc87427_driver);
622 if (err)
623 goto exit;
624
625
626 err = pc87427_device_add(address[0]);
627 if (err)
628 goto exit_driver;
629
630 return 0;
631
632exit_driver:
633 platform_driver_unregister(&pc87427_driver);
634exit:
635 return err;
636}
637
638static void __exit pc87427_exit(void)
639{
640 platform_device_unregister(pdev);
641 platform_driver_unregister(&pc87427_driver);
642}
643
644MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
645MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
646MODULE_LICENSE("GPL");
647
648module_init(pc87427_init);
649module_exit(pc87427_exit);
650
