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ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / drivers / hwmon / sch5627.c
blob3494a4cce414304784fb95dadec1379c010286c4
1 /***************************************************************************
2 * Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> *
3 * *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
8 * *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
13 * *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
19
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 /* We only support one model */
37
38 #define SIO_SCH5627_EM_LD 0x0C /* Embedded Microcontroller LD */
39 #define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */
40 #define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
41
42 #define SIO_REG_LDSEL 0x07 /* Logical device select */
43 #define SIO_REG_DEVID 0x20 /* Device ID */
44 #define SIO_REG_ENABLE 0x30 /* Logical device enable */
45 #define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */
46
47 #define SIO_SCH5627_ID 0xC6 /* Chipset ID */
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_CMD_READ 0x02
56 #define SCH5627_CMD_WRITE 0x03
57
58 #define SCH5627_REG_BUILD_CODE 0x39
59 #define SCH5627_REG_BUILD_ID 0x3a
60 #define SCH5627_REG_HWMON_ID 0x3c
61 #define SCH5627_REG_HWMON_REV 0x3d
62 #define SCH5627_REG_COMPANY_ID 0x3e
63 #define SCH5627_REG_PRIMARY_ID 0x3f
64 #define SCH5627_REG_CTRL 0x40
65
66 #define SCH5627_NO_TEMPS 8
67 #define SCH5627_NO_FANS 4
68 #define SCH5627_NO_IN 5
69
70 static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
71 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
72 static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
73 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
74 static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
75 0, 0, 1, 1, 0, 0, 0, 1 };
76 static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
77 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
78 static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
79 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
80
81 static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
82 0x2C, 0x2E, 0x30, 0x32 };
83 static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
84 0x62, 0x64, 0x66, 0x68 };
85
86 static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
87 0x22, 0x23, 0x24, 0x25, 0x189 };
88 static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
89 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
90 static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
91 1, 0, 1, 0, 1 };
92 static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
93 10745, 3660, 9765, 10745, 3660 };
94 static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
95 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
96
97 struct sch5627_data {
98 unsigned short addr;
99 struct device *hwmon_dev;
100 u8 control;
101 u8 temp_max[SCH5627_NO_TEMPS];
102 u8 temp_crit[SCH5627_NO_TEMPS];
103 u16 fan_min[SCH5627_NO_FANS];
104
105 struct mutex update_lock;
106 unsigned long last_battery; /* In jiffies */
107 char valid; /* !=0 if following fields are valid */
108 unsigned long last_updated; /* In jiffies */
109 u16 temp[SCH5627_NO_TEMPS];
110 u16 fan[SCH5627_NO_FANS];
111 u16 in[SCH5627_NO_IN];
112 };
113
114 static struct platform_device *sch5627_pdev;
115
116 /* Super I/O functions */
117 static inline int superio_inb(int base, int reg)
118 {
119 outb(reg, base);
120 return inb(base + 1);
121 }
122
123 static inline int superio_enter(int base)
124 {
125 /* Don't step on other drivers' I/O space by accident */
126 if (!request_muxed_region(base, 2, DRVNAME)) {
127 pr_err("I/O address 0x%04x already in use\n", base);
128 return -EBUSY;
129 }
130
131 outb(SIO_UNLOCK_KEY, base);
132
133 return 0;
134 }
135
136 static inline void superio_select(int base, int ld)
137 {
138 outb(SIO_REG_LDSEL, base);
139 outb(ld, base + 1);
140 }
141
142 static inline void superio_exit(int base)
143 {
144 outb(SIO_LOCK_KEY, base);
145 release_region(base, 2);
146 }
147
148 static int sch5627_send_cmd(struct sch5627_data *data, u8 cmd, u16 reg, u8 v)
149 {
150 u8 val;
151 int i;
152 /*
153 * According to SMSC for the commands we use the maximum time for
154 * the EM to respond is 15 ms, but testing shows in practice it
155 * responds within 15-32 reads, so we first busy poll, and if
156 * that fails sleep a bit and try again until we are way past
157 * the 15 ms maximum response time.
158 */
159 const int max_busy_polls = 64;
160 const int max_lazy_polls = 32;
161
162 /* (Optional) Write-Clear the EC to Host Mailbox Register */
163 val = inb(data->addr + 1);
164 outb(val, data->addr + 1);
165
166 /* Set Mailbox Address Pointer to first location in Region 1 */
167 outb(0x00, data->addr + 2);
168 outb(0x80, data->addr + 3);
169
170 /* Write Request Packet Header */
171 outb(cmd, data->addr + 4); /* VREG Access Type read:0x02 write:0x03 */
172 outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */
173 outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */
174
175 /* Write Value field */
176 if (cmd == SCH5627_CMD_WRITE)
177 outb(v, data->addr + 4);
178
179 /* Write Address field */
180 outb(reg & 0xff, data->addr + 6);
181 outb(reg >> 8, data->addr + 7);
182
183 /* Execute the Random Access Command */
184 outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */
185
186 /* EM Interface Polling "Algorithm" */
187 for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
188 if (i >= max_busy_polls)
189 msleep(1);
190 /* Read Interrupt source Register */
191 val = inb(data->addr + 8);
192 /* Write Clear the interrupt source bits */
193 if (val)
194 outb(val, data->addr + 8);
195 /* Command Completed ? */
196 if (val & 0x01)
197 break;
198 }
199 if (i == max_busy_polls + max_lazy_polls) {
200 pr_err("Max retries exceeded reading virtual "
201 "register 0x%04hx (%d)\n", reg, 1);
202 return -EIO;
203 }
204
205 /*
206 * According to SMSC we may need to retry this, but sofar I've always
207 * seen this succeed in 1 try.
208 */
209 for (i = 0; i < max_busy_polls; i++) {
210 /* Read EC-to-Host Register */
211 val = inb(data->addr + 1);
212 /* Command Completed ? */
213 if (val == 0x01)
214 break;
215
216 if (i == 0)
217 pr_warn("EC reports: 0x%02x reading virtual register "
218 "0x%04hx\n", (unsigned int)val, reg);
219 }
220 if (i == max_busy_polls) {
221 pr_err("Max retries exceeded reading virtual "
222 "register 0x%04hx (%d)\n", reg, 2);
223 return -EIO;
224 }
225
226 /*
227 * According to the SMSC app note we should now do:
228 *
229 * Set Mailbox Address Pointer to first location in Region 1 *
230 * outb(0x00, data->addr + 2);
231 * outb(0x80, data->addr + 3);
232 *
233 * But if we do that things don't work, so let's not.
234 */
235
236 /* Read Value field */
237 if (cmd == SCH5627_CMD_READ)
238 return inb(data->addr + 4);
239
240 return 0;
241 }
242
243 static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
244 {
245 return sch5627_send_cmd(data, SCH5627_CMD_READ, reg, 0);
246 }
247
248 static int sch5627_write_virtual_reg(struct sch5627_data *data,
249 u16 reg, u8 val)
250 {
251 return sch5627_send_cmd(data, SCH5627_CMD_WRITE, reg, val);
252 }
253
254 static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
255 {
256 int lsb, msb;
257
258 /* Read LSB first, this will cause the matching MSB to be latched */
259 lsb = sch5627_read_virtual_reg(data, reg);
260 if (lsb < 0)
261 return lsb;
262
263 msb = sch5627_read_virtual_reg(data, reg + 1);
264 if (msb < 0)
265 return msb;
266
267 return lsb | (msb << 8);
268 }
269
270 static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg,
271 u16 lsn_reg, int high_nibble)
272 {
273 int msb, lsn;
274
275 /* Read MSB first, this will cause the matching LSN to be latched */
276 msb = sch5627_read_virtual_reg(data, msb_reg);
277 if (msb < 0)
278 return msb;
279
280 lsn = sch5627_read_virtual_reg(data, lsn_reg);
281 if (lsn < 0)
282 return lsn;
283
284 if (high_nibble)
285 return (msb << 4) | (lsn >> 4);
286 else
287 return (msb << 4) | (lsn & 0x0f);
288 }
289
290 static struct sch5627_data *sch5627_update_device(struct device *dev)
291 {
292 struct sch5627_data *data = dev_get_drvdata(dev);
293 struct sch5627_data *ret = data;
294 int i, val;
295
296 mutex_lock(&data->update_lock);
297
298 /* Trigger a Vbat voltage measurement every 5 minutes */
299 if (time_after(jiffies, data->last_battery + 300 * HZ)) {
300 sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
301 data->control | 0x10);
302 data->last_battery = jiffies;
303 }
304
305 /* Cache the values for 1 second */
306 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
307 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
308 val = sch5627_read_virtual_reg12(data,
309 SCH5627_REG_TEMP_MSB[i],
310 SCH5627_REG_TEMP_LSN[i],
311 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
312 if (unlikely(val < 0)) {
313 ret = ERR_PTR(val);
314 goto abort;
315 }
316 data->temp[i] = val;
317 }
318
319 for (i = 0; i < SCH5627_NO_FANS; i++) {
320 val = sch5627_read_virtual_reg16(data,
321 SCH5627_REG_FAN[i]);
322 if (unlikely(val < 0)) {
323 ret = ERR_PTR(val);
324 goto abort;
325 }
326 data->fan[i] = val;
327 }
328
329 for (i = 0; i < SCH5627_NO_IN; i++) {
330 val = sch5627_read_virtual_reg12(data,
331 SCH5627_REG_IN_MSB[i],
332 SCH5627_REG_IN_LSN[i],
333 SCH5627_REG_IN_HIGH_NIBBLE[i]);
334 if (unlikely(val < 0)) {
335 ret = ERR_PTR(val);
336 goto abort;
337 }
338 data->in[i] = val;
339 }
340
341 data->last_updated = jiffies;
342 data->valid = 1;
343 }
344 abort:
345 mutex_unlock(&data->update_lock);
346 return ret;
347 }
348
349 static int __devinit sch5627_read_limits(struct sch5627_data *data)
350 {
351 int i, val;
352
353 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
354 /*
355 * Note what SMSC calls ABS, is what lm_sensors calls max
356 * (aka high), and HIGH is what lm_sensors calls crit.
357 */
358 val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]);
359 if (val < 0)
360 return val;
361 data->temp_max[i] = val;
362
363 val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]);
364 if (val < 0)
365 return val;
366 data->temp_crit[i] = val;
367 }
368 for (i = 0; i < SCH5627_NO_FANS; i++) {
369 val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]);
370 if (val < 0)
371 return val;
372 data->fan_min[i] = val;
373 }
374
375 return 0;
376 }
377
378 static int reg_to_temp(u16 reg)
379 {
380 return (reg * 625) / 10 - 64000;
381 }
382
383 static int reg_to_temp_limit(u8 reg)
384 {
385 return (reg - 64) * 1000;
386 }
387
388 static int reg_to_rpm(u16 reg)
389 {
390 if (reg == 0)
391 return -EIO;
392 if (reg == 0xffff)
393 return 0;
394
395 return 5400540 / reg;
396 }
397
398 static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
399 char *buf)
400 {
401 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
402 }
403
404 static ssize_t show_temp(struct device *dev, struct device_attribute
405 *devattr, char *buf)
406 {
407 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
408 struct sch5627_data *data = sch5627_update_device(dev);
409 int val;
410
411 if (IS_ERR(data))
412 return PTR_ERR(data);
413
414 val = reg_to_temp(data->temp[attr->index]);
415 return snprintf(buf, PAGE_SIZE, "%d\n", val);
416 }
417
418 static ssize_t show_temp_fault(struct device *dev, struct device_attribute
419 *devattr, char *buf)
420 {
421 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
422 struct sch5627_data *data = sch5627_update_device(dev);
423
424 if (IS_ERR(data))
425 return PTR_ERR(data);
426
427 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
428 }
429
430 static ssize_t show_temp_max(struct device *dev, struct device_attribute
431 *devattr, char *buf)
432 {
433 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
434 struct sch5627_data *data = dev_get_drvdata(dev);
435 int val;
436
437 val = reg_to_temp_limit(data->temp_max[attr->index]);
438 return snprintf(buf, PAGE_SIZE, "%d\n", val);
439 }
440
441 static ssize_t show_temp_crit(struct device *dev, struct device_attribute
442 *devattr, char *buf)
443 {
444 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
445 struct sch5627_data *data = dev_get_drvdata(dev);
446 int val;
447
448 val = reg_to_temp_limit(data->temp_crit[attr->index]);
449 return snprintf(buf, PAGE_SIZE, "%d\n", val);
450 }
451
452 static ssize_t show_fan(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 = sch5627_update_device(dev);
457 int val;
458
459 if (IS_ERR(data))
460 return PTR_ERR(data);
461
462 val = reg_to_rpm(data->fan[attr->index]);
463 if (val < 0)
464 return val;
465
466 return snprintf(buf, PAGE_SIZE, "%d\n", val);
467 }
468
469 static ssize_t show_fan_fault(struct device *dev, struct device_attribute
470 *devattr, char *buf)
471 {
472 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
473 struct sch5627_data *data = sch5627_update_device(dev);
474
475 if (IS_ERR(data))
476 return PTR_ERR(data);
477
478 return snprintf(buf, PAGE_SIZE, "%d\n",
479 data->fan[attr->index] == 0xffff);
480 }
481
482 static ssize_t show_fan_min(struct device *dev, struct device_attribute
483 *devattr, char *buf)
484 {
485 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
486 struct sch5627_data *data = dev_get_drvdata(dev);
487 int val = reg_to_rpm(data->fan_min[attr->index]);
488 if (val < 0)
489 return val;
490
491 return snprintf(buf, PAGE_SIZE, "%d\n", val);
492 }
493
494 static ssize_t show_in(struct device *dev, struct device_attribute
495 *devattr, char *buf)
496 {
497 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
498 struct sch5627_data *data = sch5627_update_device(dev);
499 int val;
500
501 if (IS_ERR(data))
502 return PTR_ERR(data);
503
504 val = DIV_ROUND_CLOSEST(
505 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
506 10000);
507 return snprintf(buf, PAGE_SIZE, "%d\n", val);
508 }
509
510 static ssize_t show_in_label(struct device *dev, struct device_attribute
511 *devattr, char *buf)
512 {
513 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
514
515 return snprintf(buf, PAGE_SIZE, "%s\n",
516 SCH5627_IN_LABELS[attr->index]);
517 }
518
519 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
520 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
521 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
522 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
523 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
524 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
525 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
526 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
527 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
528 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
529 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
530 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
531 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
532 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
533 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
534 static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
535 static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
536 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
537 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
538 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
539 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
540 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
541 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
542 static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
543 static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
544 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
545 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
546 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
547 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
548 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
549 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
550 static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
551 static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
552
553 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
554 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
555 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
556 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
557 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
558 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
559 static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
560 static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
561 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
562 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
563 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
564 static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
565
566 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
567 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
568 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
569 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
570 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
571 static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
572 static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
573 static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
574 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
575
576 static struct attribute *sch5627_attributes[] = {
577 &dev_attr_name.attr,
578
579 &sensor_dev_attr_temp1_input.dev_attr.attr,
580 &sensor_dev_attr_temp2_input.dev_attr.attr,
581 &sensor_dev_attr_temp3_input.dev_attr.attr,
582 &sensor_dev_attr_temp4_input.dev_attr.attr,
583 &sensor_dev_attr_temp5_input.dev_attr.attr,
584 &sensor_dev_attr_temp6_input.dev_attr.attr,
585 &sensor_dev_attr_temp7_input.dev_attr.attr,
586 &sensor_dev_attr_temp8_input.dev_attr.attr,
587 &sensor_dev_attr_temp1_fault.dev_attr.attr,
588 &sensor_dev_attr_temp2_fault.dev_attr.attr,
589 &sensor_dev_attr_temp3_fault.dev_attr.attr,
590 &sensor_dev_attr_temp4_fault.dev_attr.attr,
591 &sensor_dev_attr_temp5_fault.dev_attr.attr,
592 &sensor_dev_attr_temp6_fault.dev_attr.attr,
593 &sensor_dev_attr_temp7_fault.dev_attr.attr,
594 &sensor_dev_attr_temp8_fault.dev_attr.attr,
595 &sensor_dev_attr_temp1_max.dev_attr.attr,
596 &sensor_dev_attr_temp2_max.dev_attr.attr,
597 &sensor_dev_attr_temp3_max.dev_attr.attr,
598 &sensor_dev_attr_temp4_max.dev_attr.attr,
599 &sensor_dev_attr_temp5_max.dev_attr.attr,
600 &sensor_dev_attr_temp6_max.dev_attr.attr,
601 &sensor_dev_attr_temp7_max.dev_attr.attr,
602 &sensor_dev_attr_temp8_max.dev_attr.attr,
603 &sensor_dev_attr_temp1_crit.dev_attr.attr,
604 &sensor_dev_attr_temp2_crit.dev_attr.attr,
605 &sensor_dev_attr_temp3_crit.dev_attr.attr,
606 &sensor_dev_attr_temp4_crit.dev_attr.attr,
607 &sensor_dev_attr_temp5_crit.dev_attr.attr,
608 &sensor_dev_attr_temp6_crit.dev_attr.attr,
609 &sensor_dev_attr_temp7_crit.dev_attr.attr,
610 &sensor_dev_attr_temp8_crit.dev_attr.attr,
611
612 &sensor_dev_attr_fan1_input.dev_attr.attr,
613 &sensor_dev_attr_fan2_input.dev_attr.attr,
614 &sensor_dev_attr_fan3_input.dev_attr.attr,
615 &sensor_dev_attr_fan4_input.dev_attr.attr,
616 &sensor_dev_attr_fan1_fault.dev_attr.attr,
617 &sensor_dev_attr_fan2_fault.dev_attr.attr,
618 &sensor_dev_attr_fan3_fault.dev_attr.attr,
619 &sensor_dev_attr_fan4_fault.dev_attr.attr,
620 &sensor_dev_attr_fan1_min.dev_attr.attr,
621 &sensor_dev_attr_fan2_min.dev_attr.attr,
622 &sensor_dev_attr_fan3_min.dev_attr.attr,
623 &sensor_dev_attr_fan4_min.dev_attr.attr,
624
625 &sensor_dev_attr_in0_input.dev_attr.attr,
626 &sensor_dev_attr_in1_input.dev_attr.attr,
627 &sensor_dev_attr_in2_input.dev_attr.attr,
628 &sensor_dev_attr_in3_input.dev_attr.attr,
629 &sensor_dev_attr_in4_input.dev_attr.attr,
630 &sensor_dev_attr_in0_label.dev_attr.attr,
631 &sensor_dev_attr_in1_label.dev_attr.attr,
632 &sensor_dev_attr_in2_label.dev_attr.attr,
633 &sensor_dev_attr_in3_label.dev_attr.attr,
634 /* No in4_label as in4 is a generic input pin */
635
636 NULL
637 };
638
639 static const struct attribute_group sch5627_group = {
640 .attrs = sch5627_attributes,
641 };
642
643 static int sch5627_remove(struct platform_device *pdev)
644 {
645 struct sch5627_data *data = platform_get_drvdata(pdev);
646
647 if (data->hwmon_dev)
648 hwmon_device_unregister(data->hwmon_dev);
649
650 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
651 platform_set_drvdata(pdev, NULL);
652 kfree(data);
653
654 return 0;
655 }
656
657 static int __devinit sch5627_probe(struct platform_device *pdev)
658 {
659 struct sch5627_data *data;
660 int err, build_code, build_id, hwmon_rev, val;
661
662 data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL);
663 if (!data)
664 return -ENOMEM;
665
666 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
667 mutex_init(&data->update_lock);
668 platform_set_drvdata(pdev, data);
669
670 val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID);
671 if (val < 0) {
672 err = val;
673 goto error;
674 }
675 if (val != SCH5627_HWMON_ID) {
676 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
677 val, SCH5627_HWMON_ID);
678 err = -ENODEV;
679 goto error;
680 }
681
682 val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID);
683 if (val < 0) {
684 err = val;
685 goto error;
686 }
687 if (val != SCH5627_COMPANY_ID) {
688 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
689 val, SCH5627_COMPANY_ID);
690 err = -ENODEV;
691 goto error;
692 }
693
694 val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID);
695 if (val < 0) {
696 err = val;
697 goto error;
698 }
699 if (val != SCH5627_PRIMARY_ID) {
700 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
701 val, SCH5627_PRIMARY_ID);
702 err = -ENODEV;
703 goto error;
704 }
705
706 build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE);
707 if (build_code < 0) {
708 err = build_code;
709 goto error;
710 }
711
712 build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID);
713 if (build_id < 0) {
714 err = build_id;
715 goto error;
716 }
717
718 hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV);
719 if (hwmon_rev < 0) {
720 err = hwmon_rev;
721 goto error;
722 }
723
724 val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL);
725 if (val < 0) {
726 err = val;
727 goto error;
728 }
729 data->control = val;
730 if (!(data->control & 0x01)) {
731 pr_err("hardware monitoring not enabled\n");
732 err = -ENODEV;
733 goto error;
734 }
735 /* Trigger a Vbat voltage measurement, so that we get a valid reading
736 the first time we read Vbat */
737 sch5627_write_virtual_reg(data, SCH5627_REG_CTRL,
738 data->control | 0x10);
739 data->last_battery = jiffies;
740
741 /*
742 * Read limits, we do this only once as reading a register on
743 * the sch5627 is quite expensive (and they don't change).
744 */
745 err = sch5627_read_limits(data);
746 if (err)
747 goto error;
748
749 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
750 build_code, build_id, hwmon_rev);
751
752 /* Register sysfs interface files */
753 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
754 if (err)
755 goto error;
756
757 data->hwmon_dev = hwmon_device_register(&pdev->dev);
758 if (IS_ERR(data->hwmon_dev)) {
759 err = PTR_ERR(data->hwmon_dev);
760 data->hwmon_dev = NULL;
761 goto error;
762 }
763
764 return 0;
765
766 error:
767 sch5627_remove(pdev);
768 return err;
769 }
770
771 static int __init sch5627_find(int sioaddr, unsigned short *address)
772 {
773 u8 devid;
774 int err = superio_enter(sioaddr);
775 if (err)
776 return err;
777
778 devid = superio_inb(sioaddr, SIO_REG_DEVID);
779 if (devid != SIO_SCH5627_ID) {
780 pr_debug("Unsupported device id: 0x%02x\n",
781 (unsigned int)devid);
782 err = -ENODEV;
783 goto exit;
784 }
785
786 superio_select(sioaddr, SIO_SCH5627_EM_LD);
787
788 if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
789 pr_warn("Device not activated\n");
790 err = -ENODEV;
791 goto exit;
792 }
793
794 /*
795 * Warning the order of the low / high byte is the other way around
796 * as on most other superio devices!!
797 */
798 *address = superio_inb(sioaddr, SIO_REG_ADDR) |
799 superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
800 if (*address == 0) {
801 pr_warn("Base address not set\n");
802 err = -ENODEV;
803 goto exit;
804 }
805
806 pr_info("Found %s chip at %#hx\n", DEVNAME, *address);
807 exit:
808 superio_exit(sioaddr);
809 return err;
810 }
811
812 static int __init sch5627_device_add(unsigned short address)
813 {
814 struct resource res = {
815 .start = address,
816 .end = address + REGION_LENGTH - 1,
817 .flags = IORESOURCE_IO,
818 };
819 int err;
820
821 sch5627_pdev = platform_device_alloc(DRVNAME, address);
822 if (!sch5627_pdev)
823 return -ENOMEM;
824
825 res.name = sch5627_pdev->name;
826 err = acpi_check_resource_conflict(&res);
827 if (err)
828 goto exit_device_put;
829
830 err = platform_device_add_resources(sch5627_pdev, &res, 1);
831 if (err) {
832 pr_err("Device resource addition failed\n");
833 goto exit_device_put;
834 }
835
836 err = platform_device_add(sch5627_pdev);
837 if (err) {
838 pr_err("Device addition failed\n");
839 goto exit_device_put;
840 }
841
842 return 0;
843
844 exit_device_put:
845 platform_device_put(sch5627_pdev);
846
847 return err;
848 }
849
850 static struct platform_driver sch5627_driver = {
851 .driver = {
852 .owner = THIS_MODULE,
853 .name = DRVNAME,
854 },
855 .probe = sch5627_probe,
856 .remove = sch5627_remove,
857 };
858
859 static int __init sch5627_init(void)
860 {
861 int err = -ENODEV;
862 unsigned short address;
863
864 if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address))
865 goto exit;
866
867 err = platform_driver_register(&sch5627_driver);
868 if (err)
869 goto exit;
870
871 err = sch5627_device_add(address);
872 if (err)
873 goto exit_driver;
874
875 return 0;
876
877 exit_driver:
878 platform_driver_unregister(&sch5627_driver);
879 exit:
880 return err;
881 }
882
883 static void __exit sch5627_exit(void)
884 {
885 platform_device_unregister(sch5627_pdev);
886 platform_driver_unregister(&sch5627_driver);
887 }
888
889 MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
890 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
891 MODULE_LICENSE("GPL");
892
893 module_init(sch5627_init);
894 module_exit(sch5627_exit);
Linux with added FPC-III support