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si4713-i2c: avoid potential buffer overflow on si4713
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / hwmon / sch5627.c
blob9a51dcca9b0db6410779c1bccb26b13d584b6676
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_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
67 static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
68 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
69 static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
70 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
71 static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
72 0, 0, 1, 1, 0, 0, 0, 1 };
73 static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
74 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
75 static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
76 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
77
78 static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
79 0x2C, 0x2E, 0x30, 0x32 };
80 static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
81 0x62, 0x64, 0x66, 0x68 };
82
83 static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
84 0x22, 0x23, 0x24, 0x25, 0x189 };
85 static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
86 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
87 static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
88 1, 0, 1, 0, 1 };
89 static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
90 10745, 3660, 9765, 10745, 3660 };
91 static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
92 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
93
94 struct 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; /* !=0 if following fields are valid */
103 unsigned long last_updated; /* In jiffies */
104 u16 temp[SCH5627_NO_TEMPS];
105 u16 fan[SCH5627_NO_FANS];
106 u16 in[SCH5627_NO_IN];
107 };
108
109 static struct platform_device *sch5627_pdev;
110
111 /* Super I/O functions */
112 static inline int superio_inb(int base, int reg)
113 {
114 outb(reg, base);
115 return inb(base + 1);
116 }
117
118 static inline int superio_enter(int base)
119 {
120 /* Don't step on other drivers' I/O space by accident */
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
131 static inline void superio_select(int base, int ld)
132 {
133 outb(SIO_REG_LDSEL, base);
134 outb(ld, base + 1);
135 }
136
137 static inline void superio_exit(int base)
138 {
139 outb(SIO_LOCK_KEY, base);
140 release_region(base, 2);
141 }
142
143 static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
144 {
145 u8 val;
146 int i;
147 /*
148 * According to SMSC for the commands we use the maximum time for
149 * the EM to respond is 15 ms, but testing shows in practice it
150 * responds within 15-32 reads, so we first busy poll, and if
151 * that fails sleep a bit and try again until we are way past
152 * the 15 ms maximum response time.
153 */
154 const int max_busy_polls = 64;
155 const int max_lazy_polls = 32;
156
157 /* (Optional) Write-Clear the EC to Host Mailbox Register */
158 val = inb(data->addr + 1);
159 outb(val, data->addr + 1);
160
161 /* Set Mailbox Address Pointer to first location in Region 1 */
162 outb(0x00, data->addr + 2);
163 outb(0x80, data->addr + 3);
164
165 /* Write Request Packet Header */
166 outb(0x02, data->addr + 4); /* Access Type: VREG read */
167 outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */
168 outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */
169
170 /* Write Address field */
171 outb(reg & 0xff, data->addr + 6);
172 outb(reg >> 8, data->addr + 7);
173
174 /* Execute the Random Access Command */
175 outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */
176
177 /* EM Interface Polling "Algorithm" */
178 for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
179 if (i >= max_busy_polls)
180 msleep(1);
181 /* Read Interrupt source Register */
182 val = inb(data->addr + 8);
183 /* Write Clear the interrupt source bits */
184 if (val)
185 outb(val, data->addr + 8);
186 /* Command Completed ? */
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 * According to SMSC we may need to retry this, but sofar I've always
198 * seen this succeed in 1 try.
199 */
200 for (i = 0; i < max_busy_polls; i++) {
201 /* Read EC-to-Host Register */
202 val = inb(data->addr + 1);
203 /* Command Completed ? */
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 * According to the SMSC app note we should now do:
219 *
220 * Set Mailbox Address Pointer to first location in Region 1 *
221 * outb(0x00, data->addr + 2);
222 * outb(0x80, data->addr + 3);
223 *
224 * But if we do that things don't work, so let's not.
225 */
226
227 /* Read Data from Mailbox */
228 return inb(data->addr + 4);
229 }
230
231 static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
232 {
233 int lsb, msb;
234
235 /* Read LSB first, this will cause the matching MSB to be latched */
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
247 static 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 /* Read MSB first, this will cause the matching LSN to be latched */
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
267 static 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 /* Cache the values for 1 second */
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 }
314 abort:
315 mutex_unlock(&data->update_lock);
316 return ret;
317 }
318
319 static 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 * Note what SMSC calls ABS, is what lm_sensors calls max
326 * (aka high), and HIGH is what lm_sensors calls crit.
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
348 static int reg_to_temp(u16 reg)
349 {
350 return (reg * 625) / 10 - 64000;
351 }
352
353 static int reg_to_temp_limit(u8 reg)
354 {
355 return (reg - 64) * 1000;
356 }
357
358 static 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
368 static 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
374 static 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
388 static 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
400 static 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
411 static 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
422 static 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
439 static 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
452 static 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
464 static 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
480 static 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
489 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
490 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
491 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
492 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
493 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
494 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
495 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
496 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
497 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
498 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
499 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
500 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
501 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
502 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
503 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
504 static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
505 static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
506 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
507 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
508 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
509 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
510 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
511 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
512 static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
513 static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
514 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
515 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
516 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
517 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
518 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
519 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
520 static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
521 static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
522
523 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
524 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
525 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
526 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
527 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
528 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
529 static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
530 static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
531 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
532 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
533 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
534 static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
535
536 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
537 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
538 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
539 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
540 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
541 static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
542 static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
543 static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
544 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
545
546 static 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 /* No in4_label as in4 is a generic input pin */
605
606 NULL
607 };
608
609 static const struct attribute_group sch5627_group = {
610 .attrs = sch5627_attributes,
611 };
612
613 static 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
627 static 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 * Read limits, we do this only once as reading a register on
707 * the sch5627 is quite expensive (and they don't change).
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 /* Register sysfs interface files */
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
730 error:
731 sch5627_remove(pdev);
732 return err;
733 }
734
735 static 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 * Warning the order of the low / high byte is the other way around
760 * as on most other superio devices!!
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);
771 exit:
772 superio_exit(sioaddr);
773 return err;
774 }
775
776 static 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
808 exit_device_put:
809 platform_device_put(sch5627_pdev);
810
811 return err;
812 }
813
814 static 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
823 static 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
841 exit_driver:
842 platform_driver_unregister(&sch5627_driver);
843 exit:
844 return err;
845 }
846
847 static void __exit sch5627_exit(void)
848 {
849 platform_device_unregister(sch5627_pdev);
850 platform_driver_unregister(&sch5627_driver);
851 }
852
853 MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
854 MODULE_AUTHOR("Hans de Goede (hdegoede@redhat.com)");
855 MODULE_LICENSE("GPL");
856
857 module_init(sch5627_init);
858 module_exit(sch5627_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree