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16#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17
18#include <linux/module.h>
19#include <linux/slab.h>
20#include <linux/ioport.h>
21#include <linux/jiffies.h>
22#include <linux/platform_device.h>
23#include <linux/hwmon.h>
24#include <linux/hwmon-sysfs.h>
25#include <linux/err.h>
26#include <linux/init.h>
27#include <linux/mutex.h>
28#include <linux/sysfs.h>
29#include <linux/acpi.h>
30#include <linux/io.h>
31
32static unsigned short force_id;
33module_param(force_id, ushort, 0);
34MODULE_PARM_DESC(force_id, "Override the detected device ID");
35
36static struct platform_device *pdev;
37
38#define DRVNAME "smsc47m1"
39enum chips { smsc47m1, smsc47m2 };
40
41
42
43#define REG 0x2e
44#define VAL 0x2f
45
46static inline void
47superio_outb(int reg, int val)
48{
49 outb(reg, REG);
50 outb(val, VAL);
51}
52
53static inline int
54superio_inb(int reg)
55{
56 outb(reg, REG);
57 return inb(VAL);
58}
59
60
61#define superio_select() superio_outb(0x07, 0x0A)
62
63static inline int
64superio_enter(void)
65{
66 if (!request_muxed_region(REG, 2, DRVNAME))
67 return -EBUSY;
68
69 outb(0x55, REG);
70 return 0;
71}
72
73static inline void
74superio_exit(void)
75{
76 outb(0xAA, REG);
77 release_region(REG, 2);
78}
79
80#define SUPERIO_REG_ACT 0x30
81#define SUPERIO_REG_BASE 0x60
82#define SUPERIO_REG_DEVID 0x20
83#define SUPERIO_REG_DEVREV 0x21
84
85
86
87#define SMSC_EXTENT 0x80
88
89
90#define SMSC47M1_REG_ALARM 0x04
91#define SMSC47M1_REG_TPIN(nr) (0x34 - (nr))
92#define SMSC47M1_REG_PPIN(nr) (0x36 - (nr))
93#define SMSC47M1_REG_FANDIV 0x58
94
95static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b };
96static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c };
97static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 };
98
99#define SMSC47M2_REG_ALARM6 0x09
100#define SMSC47M2_REG_TPIN1 0x38
101#define SMSC47M2_REG_TPIN2 0x37
102#define SMSC47M2_REG_TPIN3 0x2d
103#define SMSC47M2_REG_PPIN3 0x2c
104#define SMSC47M2_REG_FANDIV3 0x6a
105
106#define MIN_FROM_REG(reg, div) ((reg) >= 192 ? 0 : \
107 983040 / ((192 - (reg)) * (div)))
108#define FAN_FROM_REG(reg, div, preload) ((reg) <= (preload) || (reg) == 255 ? \
109 0 : \
110 983040 / (((reg) - (preload)) * (div)))
111#define DIV_FROM_REG(reg) (1 << (reg))
112#define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1)
113#define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01)
114#define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E)
115
116struct smsc47m1_data {
117 unsigned short addr;
118 const char *name;
119 enum chips type;
120 struct device *hwmon_dev;
121
122 struct mutex update_lock;
123 unsigned long last_updated;
124
125 u8 fan[3];
126 u8 fan_preload[3];
127 u8 fan_div[3];
128 u8 alarms;
129 u8 pwm[3];
130};
131
132struct smsc47m1_sio_data {
133 enum chips type;
134 u8 activate;
135};
136
137static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg)
138{
139 return inb_p(data->addr + reg);
140}
141
142static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg,
143 u8 value)
144{
145 outb_p(value, data->addr + reg);
146}
147
148static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
149 int init)
150{
151 struct smsc47m1_data *data = dev_get_drvdata(dev);
152
153 mutex_lock(&data->update_lock);
154
155 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) {
156 int i, fan_nr;
157 fan_nr = data->type == smsc47m2 ? 3 : 2;
158
159 for (i = 0; i < fan_nr; i++) {
160 data->fan[i] = smsc47m1_read_value(data,
161 SMSC47M1_REG_FAN[i]);
162 data->fan_preload[i] = smsc47m1_read_value(data,
163 SMSC47M1_REG_FAN_PRELOAD[i]);
164 data->pwm[i] = smsc47m1_read_value(data,
165 SMSC47M1_REG_PWM[i]);
166 }
167
168 i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV);
169 data->fan_div[0] = (i >> 4) & 0x03;
170 data->fan_div[1] = i >> 6;
171
172 data->alarms = smsc47m1_read_value(data,
173 SMSC47M1_REG_ALARM) >> 6;
174
175 if (data->alarms)
176 smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0);
177
178 if (fan_nr >= 3) {
179 data->fan_div[2] = (smsc47m1_read_value(data,
180 SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
181 data->alarms |= (smsc47m1_read_value(data,
182 SMSC47M2_REG_ALARM6) & 0x40) >> 4;
183
184 if (data->alarms & 0x04)
185 smsc47m1_write_value(data,
186 SMSC47M2_REG_ALARM6,
187 0x40);
188 }
189
190 data->last_updated = jiffies;
191 }
192
193 mutex_unlock(&data->update_lock);
194 return data;
195}
196
197static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
198 char *buf)
199{
200 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
201 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
202 int nr = attr->index;
203
204
205
206
207
208
209 int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 :
210 FAN_FROM_REG(data->fan[nr],
211 DIV_FROM_REG(data->fan_div[nr]),
212 data->fan_preload[nr]);
213 return sprintf(buf, "%d\n", rpm);
214}
215
216static ssize_t fan_min_show(struct device *dev,
217 struct device_attribute *devattr, char *buf)
218{
219 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
220 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
221 int nr = attr->index;
222 int rpm = MIN_FROM_REG(data->fan_preload[nr],
223 DIV_FROM_REG(data->fan_div[nr]));
224 return sprintf(buf, "%d\n", rpm);
225}
226
227static ssize_t fan_div_show(struct device *dev,
228 struct device_attribute *devattr, char *buf)
229{
230 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
231 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
232 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
233}
234
235static ssize_t fan_alarm_show(struct device *dev,
236 struct device_attribute *devattr, char *buf)
237{
238 int bitnr = to_sensor_dev_attr(devattr)->index;
239 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
240 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
241}
242
243static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
244 char *buf)
245{
246 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
247 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
248 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index]));
249}
250
251static ssize_t pwm_en_show(struct device *dev,
252 struct device_attribute *devattr, char *buf)
253{
254 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
255 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
256 return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index]));
257}
258
259static ssize_t alarms_show(struct device *dev,
260 struct device_attribute *devattr, char *buf)
261{
262 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
263 return sprintf(buf, "%d\n", data->alarms);
264}
265
266static ssize_t fan_min_store(struct device *dev,
267 struct device_attribute *devattr,
268 const char *buf, size_t count)
269{
270 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
271 struct smsc47m1_data *data = dev_get_drvdata(dev);
272 int nr = attr->index;
273 long rpmdiv;
274 long val;
275 int err;
276
277 err = kstrtol(buf, 10, &val);
278 if (err)
279 return err;
280
281 mutex_lock(&data->update_lock);
282 rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]);
283
284 if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) {
285 mutex_unlock(&data->update_lock);
286 return -EINVAL;
287 }
288
289 data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv);
290 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
291 data->fan_preload[nr]);
292 mutex_unlock(&data->update_lock);
293
294 return count;
295}
296
297
298
299
300
301
302
303static ssize_t fan_div_store(struct device *dev,
304 struct device_attribute *devattr,
305 const char *buf, size_t count)
306{
307 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
308 struct smsc47m1_data *data = dev_get_drvdata(dev);
309 int nr = attr->index;
310 long new_div;
311 int err;
312 long tmp;
313 u8 old_div = DIV_FROM_REG(data->fan_div[nr]);
314
315 err = kstrtol(buf, 10, &new_div);
316 if (err)
317 return err;
318
319 if (new_div == old_div)
320 return count;
321
322 mutex_lock(&data->update_lock);
323 switch (new_div) {
324 case 1:
325 data->fan_div[nr] = 0;
326 break;
327 case 2:
328 data->fan_div[nr] = 1;
329 break;
330 case 4:
331 data->fan_div[nr] = 2;
332 break;
333 case 8:
334 data->fan_div[nr] = 3;
335 break;
336 default:
337 mutex_unlock(&data->update_lock);
338 return -EINVAL;
339 }
340
341 switch (nr) {
342 case 0:
343 case 1:
344 tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV)
345 & ~(0x03 << (4 + 2 * nr));
346 tmp |= data->fan_div[nr] << (4 + 2 * nr);
347 smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp);
348 break;
349 case 2:
350 tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF;
351 tmp |= data->fan_div[2] << 4;
352 smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp);
353 break;
354 }
355
356
357 tmp = 192 - (old_div * (192 - data->fan_preload[nr])
358 + new_div / 2) / new_div;
359 data->fan_preload[nr] = clamp_val(tmp, 0, 191);
360 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
361 data->fan_preload[nr]);
362 mutex_unlock(&data->update_lock);
363
364 return count;
365}
366
367static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
368 const char *buf, size_t count)
369{
370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
371 struct smsc47m1_data *data = dev_get_drvdata(dev);
372 int nr = attr->index;
373 long val;
374 int err;
375
376 err = kstrtol(buf, 10, &val);
377 if (err)
378 return err;
379
380 if (val < 0 || val > 255)
381 return -EINVAL;
382
383 mutex_lock(&data->update_lock);
384 data->pwm[nr] &= 0x81;
385 data->pwm[nr] |= PWM_TO_REG(val);
386 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
387 data->pwm[nr]);
388 mutex_unlock(&data->update_lock);
389
390 return count;
391}
392
393static ssize_t pwm_en_store(struct device *dev,
394 struct device_attribute *devattr, const char *buf,
395 size_t count)
396{
397 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
398 struct smsc47m1_data *data = dev_get_drvdata(dev);
399 int nr = attr->index;
400 unsigned long val;
401 int err;
402
403 err = kstrtoul(buf, 10, &val);
404 if (err)
405 return err;
406
407 if (val > 1)
408 return -EINVAL;
409
410 mutex_lock(&data->update_lock);
411 data->pwm[nr] &= 0xFE;
412 data->pwm[nr] |= !val;
413 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
414 data->pwm[nr]);
415 mutex_unlock(&data->update_lock);
416
417 return count;
418}
419
420static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
421static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
422static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
423static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0);
424static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
425static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_en, 0);
426static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
427static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
428static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
429static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1);
430static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
431static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_en, 1);
432static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
433static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
434static SENSOR_DEVICE_ATTR_RW(fan3_div, fan_div, 2);
435static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2);
436static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
437static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_en, 2);
438
439static DEVICE_ATTR_RO(alarms);
440
441static ssize_t name_show(struct device *dev, struct device_attribute
442 *devattr, char *buf)
443{
444 struct smsc47m1_data *data = dev_get_drvdata(dev);
445
446 return sprintf(buf, "%s\n", data->name);
447}
448static DEVICE_ATTR_RO(name);
449
450static struct attribute *smsc47m1_attributes_fan1[] = {
451 &sensor_dev_attr_fan1_input.dev_attr.attr,
452 &sensor_dev_attr_fan1_min.dev_attr.attr,
453 &sensor_dev_attr_fan1_div.dev_attr.attr,
454 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
455 NULL
456};
457
458static const struct attribute_group smsc47m1_group_fan1 = {
459 .attrs = smsc47m1_attributes_fan1,
460};
461
462static struct attribute *smsc47m1_attributes_fan2[] = {
463 &sensor_dev_attr_fan2_input.dev_attr.attr,
464 &sensor_dev_attr_fan2_min.dev_attr.attr,
465 &sensor_dev_attr_fan2_div.dev_attr.attr,
466 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
467 NULL
468};
469
470static const struct attribute_group smsc47m1_group_fan2 = {
471 .attrs = smsc47m1_attributes_fan2,
472};
473
474static struct attribute *smsc47m1_attributes_fan3[] = {
475 &sensor_dev_attr_fan3_input.dev_attr.attr,
476 &sensor_dev_attr_fan3_min.dev_attr.attr,
477 &sensor_dev_attr_fan3_div.dev_attr.attr,
478 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
479 NULL
480};
481
482static const struct attribute_group smsc47m1_group_fan3 = {
483 .attrs = smsc47m1_attributes_fan3,
484};
485
486static struct attribute *smsc47m1_attributes_pwm1[] = {
487 &sensor_dev_attr_pwm1.dev_attr.attr,
488 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
489 NULL
490};
491
492static const struct attribute_group smsc47m1_group_pwm1 = {
493 .attrs = smsc47m1_attributes_pwm1,
494};
495
496static struct attribute *smsc47m1_attributes_pwm2[] = {
497 &sensor_dev_attr_pwm2.dev_attr.attr,
498 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
499 NULL
500};
501
502static const struct attribute_group smsc47m1_group_pwm2 = {
503 .attrs = smsc47m1_attributes_pwm2,
504};
505
506static struct attribute *smsc47m1_attributes_pwm3[] = {
507 &sensor_dev_attr_pwm3.dev_attr.attr,
508 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
509 NULL
510};
511
512static const struct attribute_group smsc47m1_group_pwm3 = {
513 .attrs = smsc47m1_attributes_pwm3,
514};
515
516static struct attribute *smsc47m1_attributes[] = {
517 &dev_attr_alarms.attr,
518 &dev_attr_name.attr,
519 NULL
520};
521
522static const struct attribute_group smsc47m1_group = {
523 .attrs = smsc47m1_attributes,
524};
525
526static int __init smsc47m1_find(struct smsc47m1_sio_data *sio_data)
527{
528 u8 val;
529 unsigned short addr;
530 int err;
531
532 err = superio_enter();
533 if (err)
534 return err;
535
536 val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552 switch (val) {
553 case 0x51:
554 pr_info("Found SMSC LPC47B27x\n");
555 sio_data->type = smsc47m1;
556 break;
557 case 0x59:
558 pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
559 sio_data->type = smsc47m1;
560 break;
561 case 0x5F:
562 pr_info("Found SMSC LPC47M14x\n");
563 sio_data->type = smsc47m1;
564 break;
565 case 0x60:
566 pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
567 sio_data->type = smsc47m1;
568 break;
569 case 0x6B:
570 if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) {
571 pr_debug("Found SMSC LPC47M233, unsupported\n");
572 superio_exit();
573 return -ENODEV;
574 }
575
576 pr_info("Found SMSC LPC47M292\n");
577 sio_data->type = smsc47m2;
578 break;
579 default:
580 superio_exit();
581 return -ENODEV;
582 }
583
584 superio_select();
585 addr = (superio_inb(SUPERIO_REG_BASE) << 8)
586 | superio_inb(SUPERIO_REG_BASE + 1);
587 if (addr == 0) {
588 pr_info("Device address not set, will not use\n");
589 superio_exit();
590 return -ENODEV;
591 }
592
593
594
595
596
597 sio_data->activate = superio_inb(SUPERIO_REG_ACT);
598 if ((sio_data->activate & 0x01) == 0) {
599 pr_info("Enabling device\n");
600 superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01);
601 }
602
603 superio_exit();
604 return addr;
605}
606
607
608static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
609{
610 if ((sio_data->activate & 0x01) == 0) {
611 if (!superio_enter()) {
612 superio_select();
613 pr_info("Disabling device\n");
614 superio_outb(SUPERIO_REG_ACT, sio_data->activate);
615 superio_exit();
616 } else {
617 pr_warn("Failed to disable device\n");
618 }
619 }
620}
621
622#define CHECK 1
623#define REQUEST 2
624
625
626
627
628
629
630
631
632static int __init smsc47m1_handle_resources(unsigned short address,
633 enum chips type, int action,
634 struct device *dev)
635{
636 static const u8 ports_m1[] = {
637
638 0x04, 1,
639 0x33, 4,
640 0x56, 7,
641 };
642
643 static const u8 ports_m2[] = {
644
645 0x04, 1,
646 0x09, 1,
647 0x2c, 2,
648 0x35, 4,
649 0x56, 7,
650 0x69, 4,
651 };
652
653 int i, ports_size, err;
654 const u8 *ports;
655
656 switch (type) {
657 case smsc47m1:
658 default:
659 ports = ports_m1;
660 ports_size = ARRAY_SIZE(ports_m1);
661 break;
662 case smsc47m2:
663 ports = ports_m2;
664 ports_size = ARRAY_SIZE(ports_m2);
665 break;
666 }
667
668 for (i = 0; i + 1 < ports_size; i += 2) {
669 unsigned short start = address + ports[i];
670 unsigned short len = ports[i + 1];
671
672 switch (action) {
673 case CHECK:
674
675 err = acpi_check_region(start, len, DRVNAME);
676 if (err)
677 return err;
678 break;
679 case REQUEST:
680
681 if (!devm_request_region(dev, start, len, DRVNAME)) {
682 dev_err(dev,
683 "Region 0x%hx-0x%hx already in use!\n",
684 start, start + len);
685 return -EBUSY;
686 }
687 break;
688 }
689 }
690
691 return 0;
692}
693
694static void smsc47m1_remove_files(struct device *dev)
695{
696 sysfs_remove_group(&dev->kobj, &smsc47m1_group);
697 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan1);
698 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan2);
699 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan3);
700 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm1);
701 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm2);
702 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm3);
703}
704
705static int __init smsc47m1_probe(struct platform_device *pdev)
706{
707 struct device *dev = &pdev->dev;
708 struct smsc47m1_sio_data *sio_data = dev_get_platdata(dev);
709 struct smsc47m1_data *data;
710 struct resource *res;
711 int err;
712 int fan1, fan2, fan3, pwm1, pwm2, pwm3;
713
714 static const char * const names[] = {
715 "smsc47m1",
716 "smsc47m2",
717 };
718
719 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
720 err = smsc47m1_handle_resources(res->start, sio_data->type,
721 REQUEST, dev);
722 if (err < 0)
723 return err;
724
725 data = devm_kzalloc(dev, sizeof(struct smsc47m1_data), GFP_KERNEL);
726 if (!data)
727 return -ENOMEM;
728
729 data->addr = res->start;
730 data->type = sio_data->type;
731 data->name = names[sio_data->type];
732 mutex_init(&data->update_lock);
733 platform_set_drvdata(pdev, data);
734
735
736
737
738
739 pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
740 == 0x04;
741 pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
742 == 0x04;
743 if (data->type == smsc47m2) {
744 fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
745 & 0x0d) == 0x09;
746 fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
747 & 0x0d) == 0x09;
748 fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
749 & 0x0d) == 0x0d;
750 pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
751 & 0x0d) == 0x08;
752 } else {
753 fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
754 & 0x05) == 0x05;
755 fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
756 & 0x05) == 0x05;
757 fan3 = 0;
758 pwm3 = 0;
759 }
760 if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
761 dev_warn(dev, "Device not configured, will not use\n");
762 return -ENODEV;
763 }
764
765
766
767
768
769
770
771
772
773 smsc47m1_update_device(dev, 1);
774
775
776 if (fan1) {
777 err = sysfs_create_group(&dev->kobj,
778 &smsc47m1_group_fan1);
779 if (err)
780 goto error_remove_files;
781 } else
782 dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
783
784 if (fan2) {
785 err = sysfs_create_group(&dev->kobj,
786 &smsc47m1_group_fan2);
787 if (err)
788 goto error_remove_files;
789 } else
790 dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
791
792 if (fan3) {
793 err = sysfs_create_group(&dev->kobj,
794 &smsc47m1_group_fan3);
795 if (err)
796 goto error_remove_files;
797 } else if (data->type == smsc47m2)
798 dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
799
800 if (pwm1) {
801 err = sysfs_create_group(&dev->kobj,
802 &smsc47m1_group_pwm1);
803 if (err)
804 goto error_remove_files;
805 } else
806 dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
807
808 if (pwm2) {
809 err = sysfs_create_group(&dev->kobj,
810 &smsc47m1_group_pwm2);
811 if (err)
812 goto error_remove_files;
813 } else
814 dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
815
816 if (pwm3) {
817 err = sysfs_create_group(&dev->kobj,
818 &smsc47m1_group_pwm3);
819 if (err)
820 goto error_remove_files;
821 } else if (data->type == smsc47m2)
822 dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
823
824 err = sysfs_create_group(&dev->kobj, &smsc47m1_group);
825 if (err)
826 goto error_remove_files;
827
828 data->hwmon_dev = hwmon_device_register(dev);
829 if (IS_ERR(data->hwmon_dev)) {
830 err = PTR_ERR(data->hwmon_dev);
831 goto error_remove_files;
832 }
833
834 return 0;
835
836error_remove_files:
837 smsc47m1_remove_files(dev);
838 return err;
839}
840
841static int __exit smsc47m1_remove(struct platform_device *pdev)
842{
843 struct smsc47m1_data *data = platform_get_drvdata(pdev);
844
845 hwmon_device_unregister(data->hwmon_dev);
846 smsc47m1_remove_files(&pdev->dev);
847
848 return 0;
849}
850
851static struct platform_driver smsc47m1_driver = {
852 .driver = {
853 .name = DRVNAME,
854 },
855 .remove = __exit_p(smsc47m1_remove),
856};
857
858static int __init smsc47m1_device_add(unsigned short address,
859 const struct smsc47m1_sio_data *sio_data)
860{
861 struct resource res = {
862 .start = address,
863 .end = address + SMSC_EXTENT - 1,
864 .name = DRVNAME,
865 .flags = IORESOURCE_IO,
866 };
867 int err;
868
869 err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL);
870 if (err)
871 goto exit;
872
873 pdev = platform_device_alloc(DRVNAME, address);
874 if (!pdev) {
875 err = -ENOMEM;
876 pr_err("Device allocation failed\n");
877 goto exit;
878 }
879
880 err = platform_device_add_resources(pdev, &res, 1);
881 if (err) {
882 pr_err("Device resource addition failed (%d)\n", err);
883 goto exit_device_put;
884 }
885
886 err = platform_device_add_data(pdev, sio_data,
887 sizeof(struct smsc47m1_sio_data));
888 if (err) {
889 pr_err("Platform data allocation failed\n");
890 goto exit_device_put;
891 }
892
893 err = platform_device_add(pdev);
894 if (err) {
895 pr_err("Device addition failed (%d)\n", err);
896 goto exit_device_put;
897 }
898
899 return 0;
900
901exit_device_put:
902 platform_device_put(pdev);
903exit:
904 return err;
905}
906
907static int __init sm_smsc47m1_init(void)
908{
909 int err;
910 unsigned short address;
911 struct smsc47m1_sio_data sio_data;
912
913 err = smsc47m1_find(&sio_data);
914 if (err < 0)
915 return err;
916 address = err;
917
918
919 err = smsc47m1_device_add(address, &sio_data);
920 if (err)
921 return err;
922
923 err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe);
924 if (err)
925 goto exit_device;
926
927 return 0;
928
929exit_device:
930 platform_device_unregister(pdev);
931 smsc47m1_restore(&sio_data);
932 return err;
933}
934
935static void __exit sm_smsc47m1_exit(void)
936{
937 platform_driver_unregister(&smsc47m1_driver);
938 smsc47m1_restore(dev_get_platdata(&pdev->dev));
939 platform_device_unregister(pdev);
940}
941
942MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
943MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
944MODULE_LICENSE("GPL");
945
946module_init(sm_smsc47m1_init);
947module_exit(sm_smsc47m1_exit);
948