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20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/jiffies.h>
26#include <linux/platform_device.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/err.h>
30#include <linux/mutex.h>
31#include <linux/io.h>
32#include <linux/acpi.h>
33#include <linux/delay.h>
34
35#define DRVNAME "sch5627"
36#define DEVNAME DRVNAME
37
38#define SIO_SCH5627_EM_LD 0x0C
39#define SIO_UNLOCK_KEY 0x55
40#define SIO_LOCK_KEY 0xAA
41
42#define SIO_REG_LDSEL 0x07
43#define SIO_REG_DEVID 0x20
44#define SIO_REG_ENABLE 0x30
45#define SIO_REG_ADDR 0x66
46
47#define SIO_SCH5627_ID 0xC6
48
49#define REGION_LENGTH 9
50
51#define SCH5627_HWMON_ID 0xa5
52#define SCH5627_COMPANY_ID 0x5c
53#define SCH5627_PRIMARY_ID 0xa0
54
55#define SCH5627_REG_BUILD_CODE 0x39
56#define SCH5627_REG_BUILD_ID 0x3a
57#define SCH5627_REG_HWMON_ID 0x3c
58#define SCH5627_REG_HWMON_REV 0x3d
59#define SCH5627_REG_COMPANY_ID 0x3e
60#define SCH5627_REG_PRIMARY_ID 0x3f
61#define SCH5627_REG_CTRL 0x40
62
63#define SCH5627_NO_TEMPS 8
64#define SCH5627_NO_FANS 4
65#define SCH5627_NO_IN 5
66
67static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
68 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
69static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
70 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
71static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
72 0, 0, 1, 1, 0, 0, 0, 1 };
73static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
74 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
75static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
76 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
77
78static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
79 0x2C, 0x2E, 0x30, 0x32 };
80static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
81 0x62, 0x64, 0x66, 0x68 };
82
83static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
84 0x22, 0x23, 0x24, 0x25, 0x189 };
85static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
86 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
87static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
88 1, 0, 1, 0, 1 };
89static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
90 10745, 3660, 9765, 10745, 3660 };
91static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
92 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
93
94struct sch5627_data {
95 unsigned short addr;
96 struct device *hwmon_dev;
97 u8 temp_max[SCH5627_NO_TEMPS];
98 u8 temp_crit[SCH5627_NO_TEMPS];
99 u16 fan_min[SCH5627_NO_FANS];
100
101 struct mutex update_lock;
102 char valid;
103 unsigned long last_updated;
104 u16 temp[SCH5627_NO_TEMPS];
105 u16 fan[SCH5627_NO_FANS];
106 u16 in[SCH5627_NO_IN];
107};
108
109static struct platform_device *sch5627_pdev;
110
111
112static inline int superio_inb(int base, int reg)
113{
114 outb(reg, base);
115 return inb(base + 1);
116}
117
118static inline int superio_enter(int base)
119{
120
121 if (!request_muxed_region(base, 2, DRVNAME)) {
122 pr_err("I/O address 0x%04x already in use\n", base);
123 return -EBUSY;
124 }
125
126 outb(SIO_UNLOCK_KEY, base);
127
128 return 0;
129}
130
131static inline void superio_select(int base, int ld)
132{
133 outb(SIO_REG_LDSEL, base);
134 outb(ld, base + 1);
135}
136
137static inline void superio_exit(int base)
138{
139 outb(SIO_LOCK_KEY, base);
140 release_region(base, 2);
141}
142
143static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
144{
145 u8 val;
146 int i;
147
148
149
150
151
152
153
154 const int max_busy_polls = 64;
155 const int max_lazy_polls = 32;
156
157
158 val = inb(data->addr + 1);
159 outb(val, data->addr + 1);
160
161
162 outb(0x00, data->addr + 2);
163 outb(0x80, data->addr + 3);
164
165
166 outb(0x02, data->addr + 4);
167 outb(0x01, data->addr + 5);
168 outb(0x04, data->addr + 2);
169
170
171 outb(reg & 0xff, data->addr + 6);
172 outb(reg >> 8, data->addr + 7);
173
174
175 outb(0x01, data->addr);
176
177
178 for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
179 if (i >= max_busy_polls)
180 msleep(1);
181
182 val = inb(data->addr + 8);
183
184 if (val)
185 outb(val, data->addr + 8);
186
187 if (val & 0x01)
188 break;
189 }
190 if (i == max_busy_polls + max_lazy_polls) {
191 pr_err("Max retries exceeded reading virtual "
192 "register 0x%04hx (%d)\n", reg, 1);
193 return -EIO;
194 }
195
196
197
198
199
200 for (i = 0; i < max_busy_polls; i++) {
201
202 val = inb(data->addr + 1);
203
204 if (val == 0x01)
205 break;
206
207 if (i == 0)
208 pr_warn("EC reports: 0x%02x reading virtual register "
209 "0x%04hx\n", (unsigned int)val, reg);
210 }
211 if (i == max_busy_polls) {
212 pr_err("Max retries exceeded reading virtual "
213 "register 0x%04hx (%d)\n", reg, 2);
214 return -EIO;
215 }
216
217
218
219
220
221
222
223
224
225
226
227
228 return inb(data->addr + 4);
229}
230
231static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
232{
233 int lsb, msb;
234
235
236 lsb = sch5627_read_virtual_reg(data, reg);
237 if (lsb < 0)
238 return lsb;
239
240 msb = sch5627_read_virtual_reg(data, reg + 1);
241 if (msb < 0)
242 return msb;
243
244 return lsb | (msb << 8);
245}
246
247static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg,
248 u16 lsn_reg, int high_nibble)
249{
250 int msb, lsn;
251
252
253 msb = sch5627_read_virtual_reg(data, msb_reg);
254 if (msb < 0)
255 return msb;
256
257 lsn = sch5627_read_virtual_reg(data, lsn_reg);
258 if (lsn < 0)
259 return lsn;
260
261 if (high_nibble)
262 return (msb << 4) | (lsn >> 4);
263 else
264 return (msb << 4) | (lsn & 0x0f);
265}
266
267static struct sch5627_data *sch5627_update_device(struct device *dev)
268{
269 struct sch5627_data *data = dev_get_drvdata(dev);
270 struct sch5627_data *ret = data;
271 int i, val;
272
273 mutex_lock(&data->update_lock);
274
275
276 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
277 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
278 val = sch5627_read_virtual_reg12(data,
279 SCH5627_REG_TEMP_MSB[i],
280 SCH5627_REG_TEMP_LSN[i],
281 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
282 if (unlikely(val < 0)) {
283 ret = ERR_PTR(val);
284 goto abort;
285 }
286 data->temp[i] = val;
287 }
288
289 for (i = 0; i < SCH5627_NO_FANS; i++) {
290 val = sch5627_read_virtual_reg16(data,
291 SCH5627_REG_FAN[i]);
292 if (unlikely(val < 0)) {
293 ret = ERR_PTR(val);
294 goto abort;
295 }
296 data->fan[i] = val;
297 }
298
299 for (i = 0; i < SCH5627_NO_IN; i++) {
300 val = sch5627_read_virtual_reg12(data,
301 SCH5627_REG_IN_MSB[i],
302 SCH5627_REG_IN_LSN[i],
303 SCH5627_REG_IN_HIGH_NIBBLE[i]);
304 if (unlikely(val < 0)) {
305 ret = ERR_PTR(val);
306 goto abort;
307 }
308 data->in[i] = val;
309 }
310
311 data->last_updated = jiffies;
312 data->valid = 1;
313 }
314abort:
315 mutex_unlock(&data->update_lock);
316 return ret;
317}
318
319static int __devinit sch5627_read_limits(struct sch5627_data *data)
320{
321 int i, val;
322
323 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
324
325
326
327
328 val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]);
329 if (val < 0)
330 return val;
331 data->temp_max[i] = val;
332
333 val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]);
334 if (val < 0)
335 return val;
336 data->temp_crit[i] = val;
337 }
338 for (i = 0; i < SCH5627_NO_FANS; i++) {
339 val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]);
340 if (val < 0)
341 return val;
342 data->fan_min[i] = val;
343 }
344
345 return 0;
346}
347
348static int reg_to_temp(u16 reg)
349{
350 return (reg * 625) / 10 - 64000;
351}
352
353static int reg_to_temp_limit(u8 reg)
354{
355 return (reg - 64) * 1000;
356}
357
358static int reg_to_rpm(u16 reg)
359{
360 if (reg == 0)
361 return -EIO;
362 if (reg == 0xffff)
363 return 0;
364
365 return 5400540 / reg;
366}
367
368static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
369 char *buf)
370{
371 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
372}
373
374static ssize_t show_temp(struct device *dev, struct device_attribute
375 *devattr, char *buf)
376{
377 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
378 struct sch5627_data *data = sch5627_update_device(dev);
379 int val;
380
381 if (IS_ERR(data))
382 return PTR_ERR(data);
383
384 val = reg_to_temp(data->temp[attr->index]);
385 return snprintf(buf, PAGE_SIZE, "%d\n", val);
386}
387
388static ssize_t show_temp_fault(struct device *dev, struct device_attribute
389 *devattr, char *buf)
390{
391 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
392 struct sch5627_data *data = sch5627_update_device(dev);
393
394 if (IS_ERR(data))
395 return PTR_ERR(data);
396
397 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
398}
399
400static ssize_t show_temp_max(struct device *dev, struct device_attribute
401 *devattr, char *buf)
402{
403 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
404 struct sch5627_data *data = dev_get_drvdata(dev);
405 int val;
406
407 val = reg_to_temp_limit(data->temp_max[attr->index]);
408 return snprintf(buf, PAGE_SIZE, "%d\n", val);
409}
410
411static ssize_t show_temp_crit(struct device *dev, struct device_attribute
412 *devattr, char *buf)
413{
414 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
415 struct sch5627_data *data = dev_get_drvdata(dev);
416 int val;
417
418 val = reg_to_temp_limit(data->temp_crit[attr->index]);
419 return snprintf(buf, PAGE_SIZE, "%d\n", val);
420}
421
422static ssize_t show_fan(struct device *dev, struct device_attribute
423 *devattr, char *buf)
424{
425 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
426 struct sch5627_data *data = sch5627_update_device(dev);
427 int val;
428
429 if (IS_ERR(data))
430 return PTR_ERR(data);
431
432 val = reg_to_rpm(data->fan[attr->index]);
433 if (val < 0)
434 return val;
435
436 return snprintf(buf, PAGE_SIZE, "%d\n", val);
437}
438
439static ssize_t show_fan_fault(struct device *dev, struct device_attribute
440 *devattr, char *buf)
441{
442 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
443 struct sch5627_data *data = sch5627_update_device(dev);
444
445 if (IS_ERR(data))
446 return PTR_ERR(data);
447
448 return snprintf(buf, PAGE_SIZE, "%d\n",
449 data->fan[attr->index] == 0xffff);
450}
451
452static ssize_t show_fan_min(struct device *dev, struct device_attribute
453 *devattr, char *buf)
454{
455 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
456 struct sch5627_data *data = dev_get_drvdata(dev);
457 int val = reg_to_rpm(data->fan_min[attr->index]);
458 if (val < 0)
459 return val;
460
461 return snprintf(buf, PAGE_SIZE, "%d\n", val);
462}
463
464static ssize_t show_in(struct device *dev, struct device_attribute
465 *devattr, char *buf)
466{
467 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
468 struct sch5627_data *data = sch5627_update_device(dev);
469 int val;
470
471 if (IS_ERR(data))
472 return PTR_ERR(data);
473
474 val = DIV_ROUND_CLOSEST(
475 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
476 10000);
477 return snprintf(buf, PAGE_SIZE, "%d\n", val);
478}
479
480static ssize_t show_in_label(struct device *dev, struct device_attribute
481 *devattr, char *buf)
482{
483 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
484
485 return snprintf(buf, PAGE_SIZE, "%s\n",
486 SCH5627_IN_LABELS[attr->index]);
487}
488
489static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
490static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
491static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
492static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
493static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
494static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
495static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
496static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
497static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
498static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
499static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
500static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
501static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
502static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
503static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
504static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
505static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
506static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
507static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
508static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
509static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
510static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
511static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
512static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
513static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
514static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
515static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
516static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
517static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
518static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
519static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
520static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
521static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
522
523static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
524static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
525static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
526static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
527static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
528static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
529static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
530static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
531static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
532static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
533static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
534static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
535
536static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
537static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
538static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
539static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
540static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
541static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
542static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
543static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
544static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
545
546static struct attribute *sch5627_attributes[] = {
547 &dev_attr_name.attr,
548
549 &sensor_dev_attr_temp1_input.dev_attr.attr,
550 &sensor_dev_attr_temp2_input.dev_attr.attr,
551 &sensor_dev_attr_temp3_input.dev_attr.attr,
552 &sensor_dev_attr_temp4_input.dev_attr.attr,
553 &sensor_dev_attr_temp5_input.dev_attr.attr,
554 &sensor_dev_attr_temp6_input.dev_attr.attr,
555 &sensor_dev_attr_temp7_input.dev_attr.attr,
556 &sensor_dev_attr_temp8_input.dev_attr.attr,
557 &sensor_dev_attr_temp1_fault.dev_attr.attr,
558 &sensor_dev_attr_temp2_fault.dev_attr.attr,
559 &sensor_dev_attr_temp3_fault.dev_attr.attr,
560 &sensor_dev_attr_temp4_fault.dev_attr.attr,
561 &sensor_dev_attr_temp5_fault.dev_attr.attr,
562 &sensor_dev_attr_temp6_fault.dev_attr.attr,
563 &sensor_dev_attr_temp7_fault.dev_attr.attr,
564 &sensor_dev_attr_temp8_fault.dev_attr.attr,
565 &sensor_dev_attr_temp1_max.dev_attr.attr,
566 &sensor_dev_attr_temp2_max.dev_attr.attr,
567 &sensor_dev_attr_temp3_max.dev_attr.attr,
568 &sensor_dev_attr_temp4_max.dev_attr.attr,
569 &sensor_dev_attr_temp5_max.dev_attr.attr,
570 &sensor_dev_attr_temp6_max.dev_attr.attr,
571 &sensor_dev_attr_temp7_max.dev_attr.attr,
572 &sensor_dev_attr_temp8_max.dev_attr.attr,
573 &sensor_dev_attr_temp1_crit.dev_attr.attr,
574 &sensor_dev_attr_temp2_crit.dev_attr.attr,
575 &sensor_dev_attr_temp3_crit.dev_attr.attr,
576 &sensor_dev_attr_temp4_crit.dev_attr.attr,
577 &sensor_dev_attr_temp5_crit.dev_attr.attr,
578 &sensor_dev_attr_temp6_crit.dev_attr.attr,
579 &sensor_dev_attr_temp7_crit.dev_attr.attr,
580 &sensor_dev_attr_temp8_crit.dev_attr.attr,
581
582 &sensor_dev_attr_fan1_input.dev_attr.attr,
583 &sensor_dev_attr_fan2_input.dev_attr.attr,
584 &sensor_dev_attr_fan3_input.dev_attr.attr,
585 &sensor_dev_attr_fan4_input.dev_attr.attr,
586 &sensor_dev_attr_fan1_fault.dev_attr.attr,
587 &sensor_dev_attr_fan2_fault.dev_attr.attr,
588 &sensor_dev_attr_fan3_fault.dev_attr.attr,
589 &sensor_dev_attr_fan4_fault.dev_attr.attr,
590 &sensor_dev_attr_fan1_min.dev_attr.attr,
591 &sensor_dev_attr_fan2_min.dev_attr.attr,
592 &sensor_dev_attr_fan3_min.dev_attr.attr,
593 &sensor_dev_attr_fan4_min.dev_attr.attr,
594
595 &sensor_dev_attr_in0_input.dev_attr.attr,
596 &sensor_dev_attr_in1_input.dev_attr.attr,
597 &sensor_dev_attr_in2_input.dev_attr.attr,
598 &sensor_dev_attr_in3_input.dev_attr.attr,
599 &sensor_dev_attr_in4_input.dev_attr.attr,
600 &sensor_dev_attr_in0_label.dev_attr.attr,
601 &sensor_dev_attr_in1_label.dev_attr.attr,
602 &sensor_dev_attr_in2_label.dev_attr.attr,
603 &sensor_dev_attr_in3_label.dev_attr.attr,
604
605
606 NULL
607};
608
609static const struct attribute_group sch5627_group = {
610 .attrs = sch5627_attributes,
611};
612
613static int sch5627_remove(struct platform_device *pdev)
614{
615 struct sch5627_data *data = platform_get_drvdata(pdev);
616
617 if (data->hwmon_dev)
618 hwmon_device_unregister(data->hwmon_dev);
619
620 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
621 platform_set_drvdata(pdev, NULL);
622 kfree(data);
623
624 return 0;
625}
626
627static int __devinit sch5627_probe(struct platform_device *pdev)
628{
629 struct sch5627_data *data;
630 int err, build_code, build_id, hwmon_rev, val;
631
632 data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL);
633 if (!data)
634 return -ENOMEM;
635
636 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
637 mutex_init(&data->update_lock);
638 platform_set_drvdata(pdev, data);
639
640 val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID);
641 if (val < 0) {
642 err = val;
643 goto error;
644 }
645 if (val != SCH5627_HWMON_ID) {
646 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
647 val, SCH5627_HWMON_ID);
648 err = -ENODEV;
649 goto error;
650 }
651
652 val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID);
653 if (val < 0) {
654 err = val;
655 goto error;
656 }
657 if (val != SCH5627_COMPANY_ID) {
658 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
659 val, SCH5627_COMPANY_ID);
660 err = -ENODEV;
661 goto error;
662 }
663
664 val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID);
665 if (val < 0) {
666 err = val;
667 goto error;
668 }
669 if (val != SCH5627_PRIMARY_ID) {
670 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
671 val, SCH5627_PRIMARY_ID);
672 err = -ENODEV;
673 goto error;
674 }
675
676 build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE);
677 if (build_code < 0) {
678 err = build_code;
679 goto error;
680 }
681
682 build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID);
683 if (build_id < 0) {
684 err = build_id;
685 goto error;
686 }
687
688 hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV);
689 if (hwmon_rev < 0) {
690 err = hwmon_rev;
691 goto error;
692 }
693
694 val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL);
695 if (val < 0) {
696 err = val;
697 goto error;
698 }
699 if (!(val & 0x01)) {
700 pr_err("hardware monitoring not enabled\n");
701 err = -ENODEV;
702 goto error;
703 }
704
705
706
707
708
709 err = sch5627_read_limits(data);
710 if (err)
711 goto error;
712
713 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
714 build_code, build_id, hwmon_rev);
715
716
717 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
718 if (err)
719 goto error;
720
721 data->hwmon_dev = hwmon_device_register(&pdev->dev);
722 if (IS_ERR(data->hwmon_dev)) {
723 err = PTR_ERR(data->hwmon_dev);
724 data->hwmon_dev = NULL;
725 goto error;
726 }
727
728 return 0;
729
730error:
731 sch5627_remove(pdev);
732 return err;
733}
734
735static int __init sch5627_find(int sioaddr, unsigned short *address)
736{
737 u8 devid;
738 int err = superio_enter(sioaddr);
739 if (err)
740 return err;
741
742 devid = superio_inb(sioaddr, SIO_REG_DEVID);
743 if (devid != SIO_SCH5627_ID) {
744 pr_debug("Unsupported device id: 0x%02x\n",
745 (unsigned int)devid);
746 err = -ENODEV;
747 goto exit;
748 }
749
750 superio_select(sioaddr, SIO_SCH5627_EM_LD);
751
752 if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
753 pr_warn("Device not activated\n");
754 err = -ENODEV;
755 goto exit;
756 }
757
758
759
760
761
762 *address = superio_inb(sioaddr, SIO_REG_ADDR) |
763 superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
764 if (*address == 0) {
765 pr_warn("Base address not set\n");
766 err = -ENODEV;
767 goto exit;
768 }
769
770 pr_info("Found %s chip at %#hx\n", DEVNAME, *address);
771exit:
772 superio_exit(sioaddr);
773 return err;
774}
775
776static int __init sch5627_device_add(unsigned short address)
777{
778 struct resource res = {
779 .start = address,
780 .end = address + REGION_LENGTH - 1,
781 .flags = IORESOURCE_IO,
782 };
783 int err;
784
785 sch5627_pdev = platform_device_alloc(DRVNAME, address);
786 if (!sch5627_pdev)
787 return -ENOMEM;
788
789 res.name = sch5627_pdev->name;
790 err = acpi_check_resource_conflict(&res);
791 if (err)
792 goto exit_device_put;
793
794 err = platform_device_add_resources(sch5627_pdev, &res, 1);
795 if (err) {
796 pr_err("Device resource addition failed\n");
797 goto exit_device_put;
798 }
799
800 err = platform_device_add(sch5627_pdev);
801 if (err) {
802 pr_err("Device addition failed\n");
803 goto exit_device_put;
804 }
805
806 return 0;
807
808exit_device_put:
809 platform_device_put(sch5627_pdev);
810
811 return err;
812}
813
814static struct platform_driver sch5627_driver = {
815 .driver = {
816 .owner = THIS_MODULE,
817 .name = DRVNAME,
818 },
819 .probe = sch5627_probe,
820 .remove = sch5627_remove,
821};
822
823static int __init sch5627_init(void)
824{
825 int err = -ENODEV;
826 unsigned short address;
827
828 if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address))
829 goto exit;
830
831 err = platform_driver_register(&sch5627_driver);
832 if (err)
833 goto exit;
834
835 err = sch5627_device_add(address);
836 if (err)
837 goto exit_driver;
838
839 return 0;
840
841exit_driver:
842 platform_driver_unregister(&sch5627_driver);
843exit:
844 return err;
845}
846
847static void __exit sch5627_exit(void)
848{
849 platform_device_unregister(sch5627_pdev);
850 platform_driver_unregister(&sch5627_driver);
851}
852
853MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
854MODULE_AUTHOR("Hans de Goede (hdegoede@redhat.com)");
855MODULE_LICENSE("GPL");
856
857module_init(sch5627_init);
858module_exit(sch5627_exit);
859
