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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 "sch56xx-common.h"
32
33#define DRVNAME "sch5627"
34#define DEVNAME DRVNAME /* We only support one model */
35
36#define SCH5627_HWMON_ID 0xa5
37#define SCH5627_COMPANY_ID 0x5c
38#define SCH5627_PRIMARY_ID 0xa0
39
40#define SCH5627_REG_BUILD_CODE 0x39
41#define SCH5627_REG_BUILD_ID 0x3a
42#define SCH5627_REG_HWMON_ID 0x3c
43#define SCH5627_REG_HWMON_REV 0x3d
44#define SCH5627_REG_COMPANY_ID 0x3e
45#define SCH5627_REG_PRIMARY_ID 0x3f
46#define SCH5627_REG_CTRL 0x40
47
48#define SCH5627_NO_TEMPS 8
49#define SCH5627_NO_FANS 4
50#define SCH5627_NO_IN 5
51
52static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
53 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
54static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
55 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
56static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
57 0, 0, 1, 1, 0, 0, 0, 1 };
58static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
59 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
60static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
61 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
62
63static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
64 0x2C, 0x2E, 0x30, 0x32 };
65static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
66 0x62, 0x64, 0x66, 0x68 };
67
68static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
69 0x22, 0x23, 0x24, 0x25, 0x189 };
70static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
71 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
72static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
73 1, 0, 1, 0, 1 };
74static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
75 10745, 3660, 9765, 10745, 3660 };
76static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
77 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
78
79struct sch5627_data {
80 unsigned short addr;
81 struct device *hwmon_dev;
82 u8 control;
83 u8 temp_max[SCH5627_NO_TEMPS];
84 u8 temp_crit[SCH5627_NO_TEMPS];
85 u16 fan_min[SCH5627_NO_FANS];
86
87 struct mutex update_lock;
88 unsigned long last_battery; /* In jiffies */
89 char valid; /* !=0 if following fields are valid */
90 unsigned long last_updated; /* In jiffies */
91 u16 temp[SCH5627_NO_TEMPS];
92 u16 fan[SCH5627_NO_FANS];
93 u16 in[SCH5627_NO_IN];
94};
95
96static struct sch5627_data *sch5627_update_device(struct device *dev)
97{
98 struct sch5627_data *data = dev_get_drvdata(dev);
99 struct sch5627_data *ret = data;
100 int i, val;
101
102 mutex_lock(&data->update_lock);
103
104 /* Trigger a Vbat voltage measurement every 5 minutes */
105 if (time_after(jiffies, data->last_battery + 300 * HZ)) {
106 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
107 data->control | 0x10);
108 data->last_battery = jiffies;
109 }
110
111 /* Cache the values for 1 second */
112 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
113 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
114 val = sch56xx_read_virtual_reg12(data->addr,
115 SCH5627_REG_TEMP_MSB[i],
116 SCH5627_REG_TEMP_LSN[i],
117 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
118 if (unlikely(val < 0)) {
119 ret = ERR_PTR(val);
120 goto abort;
121 }
122 data->temp[i] = val;
123 }
124
125 for (i = 0; i < SCH5627_NO_FANS; i++) {
126 val = sch56xx_read_virtual_reg16(data->addr,
127 SCH5627_REG_FAN[i]);
128 if (unlikely(val < 0)) {
129 ret = ERR_PTR(val);
130 goto abort;
131 }
132 data->fan[i] = val;
133 }
134
135 for (i = 0; i < SCH5627_NO_IN; i++) {
136 val = sch56xx_read_virtual_reg12(data->addr,
137 SCH5627_REG_IN_MSB[i],
138 SCH5627_REG_IN_LSN[i],
139 SCH5627_REG_IN_HIGH_NIBBLE[i]);
140 if (unlikely(val < 0)) {
141 ret = ERR_PTR(val);
142 goto abort;
143 }
144 data->in[i] = val;
145 }
146
147 data->last_updated = jiffies;
148 data->valid = 1;
149 }
150abort:
151 mutex_unlock(&data->update_lock);
152 return ret;
153}
154
155static int __devinit sch5627_read_limits(struct sch5627_data *data)
156{
157 int i, val;
158
159 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
160 /*
161 * Note what SMSC calls ABS, is what lm_sensors calls max
162 * (aka high), and HIGH is what lm_sensors calls crit.
163 */
164 val = sch56xx_read_virtual_reg(data->addr,
165 SCH5627_REG_TEMP_ABS[i]);
166 if (val < 0)
167 return val;
168 data->temp_max[i] = val;
169
170 val = sch56xx_read_virtual_reg(data->addr,
171 SCH5627_REG_TEMP_HIGH[i]);
172 if (val < 0)
173 return val;
174 data->temp_crit[i] = val;
175 }
176 for (i = 0; i < SCH5627_NO_FANS; i++) {
177 val = sch56xx_read_virtual_reg16(data->addr,
178 SCH5627_REG_FAN_MIN[i]);
179 if (val < 0)
180 return val;
181 data->fan_min[i] = val;
182 }
183
184 return 0;
185}
186
187static int reg_to_temp(u16 reg)
188{
189 return (reg * 625) / 10 - 64000;
190}
191
192static int reg_to_temp_limit(u8 reg)
193{
194 return (reg - 64) * 1000;
195}
196
197static int reg_to_rpm(u16 reg)
198{
199 if (reg == 0)
200 return -EIO;
201 if (reg == 0xffff)
202 return 0;
203
204 return 5400540 / reg;
205}
206
207static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
208 char *buf)
209{
210 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
211}
212
213static ssize_t show_temp(struct device *dev, struct device_attribute
214 *devattr, char *buf)
215{
216 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
217 struct sch5627_data *data = sch5627_update_device(dev);
218 int val;
219
220 if (IS_ERR(data))
221 return PTR_ERR(data);
222
223 val = reg_to_temp(data->temp[attr->index]);
224 return snprintf(buf, PAGE_SIZE, "%d\n", val);
225}
226
227static ssize_t show_temp_fault(struct device *dev, struct device_attribute
228 *devattr, char *buf)
229{
230 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
231 struct sch5627_data *data = sch5627_update_device(dev);
232
233 if (IS_ERR(data))
234 return PTR_ERR(data);
235
236 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
237}
238
239static ssize_t show_temp_max(struct device *dev, struct device_attribute
240 *devattr, char *buf)
241{
242 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
243 struct sch5627_data *data = dev_get_drvdata(dev);
244 int val;
245
246 val = reg_to_temp_limit(data->temp_max[attr->index]);
247 return snprintf(buf, PAGE_SIZE, "%d\n", val);
248}
249
250static ssize_t show_temp_crit(struct device *dev, struct device_attribute
251 *devattr, char *buf)
252{
253 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
254 struct sch5627_data *data = dev_get_drvdata(dev);
255 int val;
256
257 val = reg_to_temp_limit(data->temp_crit[attr->index]);
258 return snprintf(buf, PAGE_SIZE, "%d\n", val);
259}
260
261static ssize_t show_fan(struct device *dev, struct device_attribute
262 *devattr, char *buf)
263{
264 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
265 struct sch5627_data *data = sch5627_update_device(dev);
266 int val;
267
268 if (IS_ERR(data))
269 return PTR_ERR(data);
270
271 val = reg_to_rpm(data->fan[attr->index]);
272 if (val < 0)
273 return val;
274
275 return snprintf(buf, PAGE_SIZE, "%d\n", val);
276}
277
278static ssize_t show_fan_fault(struct device *dev, struct device_attribute
279 *devattr, char *buf)
280{
281 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
282 struct sch5627_data *data = sch5627_update_device(dev);
283
284 if (IS_ERR(data))
285 return PTR_ERR(data);
286
287 return snprintf(buf, PAGE_SIZE, "%d\n",
288 data->fan[attr->index] == 0xffff);
289}
290
291static ssize_t show_fan_min(struct device *dev, struct device_attribute
292 *devattr, char *buf)
293{
294 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
295 struct sch5627_data *data = dev_get_drvdata(dev);
296 int val = reg_to_rpm(data->fan_min[attr->index]);
297 if (val < 0)
298 return val;
299
300 return snprintf(buf, PAGE_SIZE, "%d\n", val);
301}
302
303static ssize_t show_in(struct device *dev, struct device_attribute
304 *devattr, char *buf)
305{
306 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
307 struct sch5627_data *data = sch5627_update_device(dev);
308 int val;
309
310 if (IS_ERR(data))
311 return PTR_ERR(data);
312
313 val = DIV_ROUND_CLOSEST(
314 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
315 10000);
316 return snprintf(buf, PAGE_SIZE, "%d\n", val);
317}
318
319static ssize_t show_in_label(struct device *dev, struct device_attribute
320 *devattr, char *buf)
321{
322 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
323
324 return snprintf(buf, PAGE_SIZE, "%s\n",
325 SCH5627_IN_LABELS[attr->index]);
326}
327
328static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
329static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
330static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
331static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
332static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
333static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
334static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
335static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
336static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
337static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
338static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
339static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
340static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
341static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
342static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
343static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
344static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
345static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
346static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
347static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
348static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
349static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
350static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
351static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
352static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
353static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
354static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
355static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
356static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
357static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
358static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
359static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
360static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
361
362static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
363static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
364static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
365static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
366static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
367static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
368static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
369static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
370static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
371static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
372static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
373static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
374
375static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
376static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
377static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
378static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
379static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
380static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
381static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
382static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
383static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
384
385static struct attribute *sch5627_attributes[] = {
386 &dev_attr_name.attr,
387
388 &sensor_dev_attr_temp1_input.dev_attr.attr,
389 &sensor_dev_attr_temp2_input.dev_attr.attr,
390 &sensor_dev_attr_temp3_input.dev_attr.attr,
391 &sensor_dev_attr_temp4_input.dev_attr.attr,
392 &sensor_dev_attr_temp5_input.dev_attr.attr,
393 &sensor_dev_attr_temp6_input.dev_attr.attr,
394 &sensor_dev_attr_temp7_input.dev_attr.attr,
395 &sensor_dev_attr_temp8_input.dev_attr.attr,
396 &sensor_dev_attr_temp1_fault.dev_attr.attr,
397 &sensor_dev_attr_temp2_fault.dev_attr.attr,
398 &sensor_dev_attr_temp3_fault.dev_attr.attr,
399 &sensor_dev_attr_temp4_fault.dev_attr.attr,
400 &sensor_dev_attr_temp5_fault.dev_attr.attr,
401 &sensor_dev_attr_temp6_fault.dev_attr.attr,
402 &sensor_dev_attr_temp7_fault.dev_attr.attr,
403 &sensor_dev_attr_temp8_fault.dev_attr.attr,
404 &sensor_dev_attr_temp1_max.dev_attr.attr,
405 &sensor_dev_attr_temp2_max.dev_attr.attr,
406 &sensor_dev_attr_temp3_max.dev_attr.attr,
407 &sensor_dev_attr_temp4_max.dev_attr.attr,
408 &sensor_dev_attr_temp5_max.dev_attr.attr,
409 &sensor_dev_attr_temp6_max.dev_attr.attr,
410 &sensor_dev_attr_temp7_max.dev_attr.attr,
411 &sensor_dev_attr_temp8_max.dev_attr.attr,
412 &sensor_dev_attr_temp1_crit.dev_attr.attr,
413 &sensor_dev_attr_temp2_crit.dev_attr.attr,
414 &sensor_dev_attr_temp3_crit.dev_attr.attr,
415 &sensor_dev_attr_temp4_crit.dev_attr.attr,
416 &sensor_dev_attr_temp5_crit.dev_attr.attr,
417 &sensor_dev_attr_temp6_crit.dev_attr.attr,
418 &sensor_dev_attr_temp7_crit.dev_attr.attr,
419 &sensor_dev_attr_temp8_crit.dev_attr.attr,
420
421 &sensor_dev_attr_fan1_input.dev_attr.attr,
422 &sensor_dev_attr_fan2_input.dev_attr.attr,
423 &sensor_dev_attr_fan3_input.dev_attr.attr,
424 &sensor_dev_attr_fan4_input.dev_attr.attr,
425 &sensor_dev_attr_fan1_fault.dev_attr.attr,
426 &sensor_dev_attr_fan2_fault.dev_attr.attr,
427 &sensor_dev_attr_fan3_fault.dev_attr.attr,
428 &sensor_dev_attr_fan4_fault.dev_attr.attr,
429 &sensor_dev_attr_fan1_min.dev_attr.attr,
430 &sensor_dev_attr_fan2_min.dev_attr.attr,
431 &sensor_dev_attr_fan3_min.dev_attr.attr,
432 &sensor_dev_attr_fan4_min.dev_attr.attr,
433
434 &sensor_dev_attr_in0_input.dev_attr.attr,
435 &sensor_dev_attr_in1_input.dev_attr.attr,
436 &sensor_dev_attr_in2_input.dev_attr.attr,
437 &sensor_dev_attr_in3_input.dev_attr.attr,
438 &sensor_dev_attr_in4_input.dev_attr.attr,
439 &sensor_dev_attr_in0_label.dev_attr.attr,
440 &sensor_dev_attr_in1_label.dev_attr.attr,
441 &sensor_dev_attr_in2_label.dev_attr.attr,
442 &sensor_dev_attr_in3_label.dev_attr.attr,
443 /* No in4_label as in4 is a generic input pin */
444
445 NULL
446};
447
448static const struct attribute_group sch5627_group = {
449 .attrs = sch5627_attributes,
450};
451
452static int sch5627_remove(struct platform_device *pdev)
453{
454 struct sch5627_data *data = platform_get_drvdata(pdev);
455
456 if (data->hwmon_dev)
457 hwmon_device_unregister(data->hwmon_dev);
458
459 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
460 platform_set_drvdata(pdev, NULL);
461 kfree(data);
462
463 return 0;
464}
465
466static int __devinit sch5627_probe(struct platform_device *pdev)
467{
468 struct sch5627_data *data;
469 int err, build_code, build_id, hwmon_rev, val;
470
471 data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL);
472 if (!data)
473 return -ENOMEM;
474
475 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
476 mutex_init(&data->update_lock);
477 platform_set_drvdata(pdev, data);
478
479 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
480 if (val < 0) {
481 err = val;
482 goto error;
483 }
484 if (val != SCH5627_HWMON_ID) {
485 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
486 val, SCH5627_HWMON_ID);
487 err = -ENODEV;
488 goto error;
489 }
490
491 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
492 if (val < 0) {
493 err = val;
494 goto error;
495 }
496 if (val != SCH5627_COMPANY_ID) {
497 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
498 val, SCH5627_COMPANY_ID);
499 err = -ENODEV;
500 goto error;
501 }
502
503 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
504 if (val < 0) {
505 err = val;
506 goto error;
507 }
508 if (val != SCH5627_PRIMARY_ID) {
509 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
510 val, SCH5627_PRIMARY_ID);
511 err = -ENODEV;
512 goto error;
513 }
514
515 build_code = sch56xx_read_virtual_reg(data->addr,
516 SCH5627_REG_BUILD_CODE);
517 if (build_code < 0) {
518 err = build_code;
519 goto error;
520 }
521
522 build_id = sch56xx_read_virtual_reg16(data->addr,
523 SCH5627_REG_BUILD_ID);
524 if (build_id < 0) {
525 err = build_id;
526 goto error;
527 }
528
529 hwmon_rev = sch56xx_read_virtual_reg(data->addr,
530 SCH5627_REG_HWMON_REV);
531 if (hwmon_rev < 0) {
532 err = hwmon_rev;
533 goto error;
534 }
535
536 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
537 if (val < 0) {
538 err = val;
539 goto error;
540 }
541 data->control = val;
542 if (!(data->control & 0x01)) {
543 pr_err("hardware monitoring not enabled\n");
544 err = -ENODEV;
545 goto error;
546 }
547 /* Trigger a Vbat voltage measurement, so that we get a valid reading
548 the first time we read Vbat */
549 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
550 data->control | 0x10);
551 data->last_battery = jiffies;
552
553 /*
554 * Read limits, we do this only once as reading a register on
555 * the sch5627 is quite expensive (and they don't change).
556 */
557 err = sch5627_read_limits(data);
558 if (err)
559 goto error;
560
561 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
562 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
563 build_code, build_id, hwmon_rev);
564
565 /* Register sysfs interface files */
566 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
567 if (err)
568 goto error;
569
570 data->hwmon_dev = hwmon_device_register(&pdev->dev);
571 if (IS_ERR(data->hwmon_dev)) {
572 err = PTR_ERR(data->hwmon_dev);
573 data->hwmon_dev = NULL;
574 goto error;
575 }
576
577 return 0;
578
579error:
580 sch5627_remove(pdev);
581 return err;
582}
583
584static struct platform_driver sch5627_driver = {
585 .driver = {
586 .owner = THIS_MODULE,
587 .name = DRVNAME,
588 },
589 .probe = sch5627_probe,
590 .remove = sch5627_remove,
591};
592
593static int __init sch5627_init(void)
594{
595 return platform_driver_register(&sch5627_driver);
596}
597
598static void __exit sch5627_exit(void)
599{
600 platform_driver_unregister(&sch5627_driver);
601}
602
603MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
604MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
605MODULE_LICENSE("GPL");
606
607module_init(sch5627_init);
608module_exit(sch5627_exit);
1/***************************************************************************
2 * Copyright (C) 2010-2012 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 "sch56xx-common.h"
32
33#define DRVNAME "sch5627"
34#define DEVNAME DRVNAME /* We only support one model */
35
36#define SCH5627_HWMON_ID 0xa5
37#define SCH5627_COMPANY_ID 0x5c
38#define SCH5627_PRIMARY_ID 0xa0
39
40#define SCH5627_REG_BUILD_CODE 0x39
41#define SCH5627_REG_BUILD_ID 0x3a
42#define SCH5627_REG_HWMON_ID 0x3c
43#define SCH5627_REG_HWMON_REV 0x3d
44#define SCH5627_REG_COMPANY_ID 0x3e
45#define SCH5627_REG_PRIMARY_ID 0x3f
46#define SCH5627_REG_CTRL 0x40
47
48#define SCH5627_NO_TEMPS 8
49#define SCH5627_NO_FANS 4
50#define SCH5627_NO_IN 5
51
52static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
53 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
54static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
55 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
56static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
57 0, 0, 1, 1, 0, 0, 0, 1 };
58static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
59 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
60static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
61 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
62
63static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
64 0x2C, 0x2E, 0x30, 0x32 };
65static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
66 0x62, 0x64, 0x66, 0x68 };
67
68static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
69 0x22, 0x23, 0x24, 0x25, 0x189 };
70static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
71 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
72static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
73 1, 0, 1, 0, 1 };
74static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
75 10745, 3660, 9765, 10745, 3660 };
76static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
77 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
78
79struct sch5627_data {
80 unsigned short addr;
81 struct device *hwmon_dev;
82 struct sch56xx_watchdog_data *watchdog;
83 u8 control;
84 u8 temp_max[SCH5627_NO_TEMPS];
85 u8 temp_crit[SCH5627_NO_TEMPS];
86 u16 fan_min[SCH5627_NO_FANS];
87
88 struct mutex update_lock;
89 unsigned long last_battery; /* In jiffies */
90 char valid; /* !=0 if following fields are valid */
91 unsigned long last_updated; /* In jiffies */
92 u16 temp[SCH5627_NO_TEMPS];
93 u16 fan[SCH5627_NO_FANS];
94 u16 in[SCH5627_NO_IN];
95};
96
97static struct sch5627_data *sch5627_update_device(struct device *dev)
98{
99 struct sch5627_data *data = dev_get_drvdata(dev);
100 struct sch5627_data *ret = data;
101 int i, val;
102
103 mutex_lock(&data->update_lock);
104
105 /* Trigger a Vbat voltage measurement every 5 minutes */
106 if (time_after(jiffies, data->last_battery + 300 * HZ)) {
107 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
108 data->control | 0x10);
109 data->last_battery = jiffies;
110 }
111
112 /* Cache the values for 1 second */
113 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
114 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
115 val = sch56xx_read_virtual_reg12(data->addr,
116 SCH5627_REG_TEMP_MSB[i],
117 SCH5627_REG_TEMP_LSN[i],
118 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
119 if (unlikely(val < 0)) {
120 ret = ERR_PTR(val);
121 goto abort;
122 }
123 data->temp[i] = val;
124 }
125
126 for (i = 0; i < SCH5627_NO_FANS; i++) {
127 val = sch56xx_read_virtual_reg16(data->addr,
128 SCH5627_REG_FAN[i]);
129 if (unlikely(val < 0)) {
130 ret = ERR_PTR(val);
131 goto abort;
132 }
133 data->fan[i] = val;
134 }
135
136 for (i = 0; i < SCH5627_NO_IN; i++) {
137 val = sch56xx_read_virtual_reg12(data->addr,
138 SCH5627_REG_IN_MSB[i],
139 SCH5627_REG_IN_LSN[i],
140 SCH5627_REG_IN_HIGH_NIBBLE[i]);
141 if (unlikely(val < 0)) {
142 ret = ERR_PTR(val);
143 goto abort;
144 }
145 data->in[i] = val;
146 }
147
148 data->last_updated = jiffies;
149 data->valid = 1;
150 }
151abort:
152 mutex_unlock(&data->update_lock);
153 return ret;
154}
155
156static int __devinit sch5627_read_limits(struct sch5627_data *data)
157{
158 int i, val;
159
160 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
161 /*
162 * Note what SMSC calls ABS, is what lm_sensors calls max
163 * (aka high), and HIGH is what lm_sensors calls crit.
164 */
165 val = sch56xx_read_virtual_reg(data->addr,
166 SCH5627_REG_TEMP_ABS[i]);
167 if (val < 0)
168 return val;
169 data->temp_max[i] = val;
170
171 val = sch56xx_read_virtual_reg(data->addr,
172 SCH5627_REG_TEMP_HIGH[i]);
173 if (val < 0)
174 return val;
175 data->temp_crit[i] = val;
176 }
177 for (i = 0; i < SCH5627_NO_FANS; i++) {
178 val = sch56xx_read_virtual_reg16(data->addr,
179 SCH5627_REG_FAN_MIN[i]);
180 if (val < 0)
181 return val;
182 data->fan_min[i] = val;
183 }
184
185 return 0;
186}
187
188static int reg_to_temp(u16 reg)
189{
190 return (reg * 625) / 10 - 64000;
191}
192
193static int reg_to_temp_limit(u8 reg)
194{
195 return (reg - 64) * 1000;
196}
197
198static int reg_to_rpm(u16 reg)
199{
200 if (reg == 0)
201 return -EIO;
202 if (reg == 0xffff)
203 return 0;
204
205 return 5400540 / reg;
206}
207
208static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
209 char *buf)
210{
211 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
212}
213
214static ssize_t show_temp(struct device *dev, struct device_attribute
215 *devattr, char *buf)
216{
217 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
218 struct sch5627_data *data = sch5627_update_device(dev);
219 int val;
220
221 if (IS_ERR(data))
222 return PTR_ERR(data);
223
224 val = reg_to_temp(data->temp[attr->index]);
225 return snprintf(buf, PAGE_SIZE, "%d\n", val);
226}
227
228static ssize_t show_temp_fault(struct device *dev, struct device_attribute
229 *devattr, char *buf)
230{
231 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
232 struct sch5627_data *data = sch5627_update_device(dev);
233
234 if (IS_ERR(data))
235 return PTR_ERR(data);
236
237 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
238}
239
240static ssize_t show_temp_max(struct device *dev, struct device_attribute
241 *devattr, char *buf)
242{
243 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
244 struct sch5627_data *data = dev_get_drvdata(dev);
245 int val;
246
247 val = reg_to_temp_limit(data->temp_max[attr->index]);
248 return snprintf(buf, PAGE_SIZE, "%d\n", val);
249}
250
251static ssize_t show_temp_crit(struct device *dev, struct device_attribute
252 *devattr, char *buf)
253{
254 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
255 struct sch5627_data *data = dev_get_drvdata(dev);
256 int val;
257
258 val = reg_to_temp_limit(data->temp_crit[attr->index]);
259 return snprintf(buf, PAGE_SIZE, "%d\n", val);
260}
261
262static ssize_t show_fan(struct device *dev, struct device_attribute
263 *devattr, char *buf)
264{
265 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
266 struct sch5627_data *data = sch5627_update_device(dev);
267 int val;
268
269 if (IS_ERR(data))
270 return PTR_ERR(data);
271
272 val = reg_to_rpm(data->fan[attr->index]);
273 if (val < 0)
274 return val;
275
276 return snprintf(buf, PAGE_SIZE, "%d\n", val);
277}
278
279static ssize_t show_fan_fault(struct device *dev, struct device_attribute
280 *devattr, char *buf)
281{
282 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
283 struct sch5627_data *data = sch5627_update_device(dev);
284
285 if (IS_ERR(data))
286 return PTR_ERR(data);
287
288 return snprintf(buf, PAGE_SIZE, "%d\n",
289 data->fan[attr->index] == 0xffff);
290}
291
292static ssize_t show_fan_min(struct device *dev, struct device_attribute
293 *devattr, char *buf)
294{
295 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
296 struct sch5627_data *data = dev_get_drvdata(dev);
297 int val = reg_to_rpm(data->fan_min[attr->index]);
298 if (val < 0)
299 return val;
300
301 return snprintf(buf, PAGE_SIZE, "%d\n", val);
302}
303
304static ssize_t show_in(struct device *dev, struct device_attribute
305 *devattr, char *buf)
306{
307 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
308 struct sch5627_data *data = sch5627_update_device(dev);
309 int val;
310
311 if (IS_ERR(data))
312 return PTR_ERR(data);
313
314 val = DIV_ROUND_CLOSEST(
315 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
316 10000);
317 return snprintf(buf, PAGE_SIZE, "%d\n", val);
318}
319
320static ssize_t show_in_label(struct device *dev, struct device_attribute
321 *devattr, char *buf)
322{
323 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
324
325 return snprintf(buf, PAGE_SIZE, "%s\n",
326 SCH5627_IN_LABELS[attr->index]);
327}
328
329static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
330static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
331static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
332static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
333static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
334static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
335static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
336static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
337static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
338static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
339static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
340static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
341static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
342static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
343static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
344static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
345static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
346static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
347static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
348static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
349static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
350static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
351static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
352static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
353static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
354static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
355static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
356static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
357static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
358static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
359static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
360static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
361static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
362
363static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
364static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
365static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
366static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
367static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
368static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
369static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
370static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
371static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
372static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
373static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
374static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
375
376static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
377static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
378static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
379static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
380static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
381static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
382static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
383static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
384static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
385
386static struct attribute *sch5627_attributes[] = {
387 &dev_attr_name.attr,
388
389 &sensor_dev_attr_temp1_input.dev_attr.attr,
390 &sensor_dev_attr_temp2_input.dev_attr.attr,
391 &sensor_dev_attr_temp3_input.dev_attr.attr,
392 &sensor_dev_attr_temp4_input.dev_attr.attr,
393 &sensor_dev_attr_temp5_input.dev_attr.attr,
394 &sensor_dev_attr_temp6_input.dev_attr.attr,
395 &sensor_dev_attr_temp7_input.dev_attr.attr,
396 &sensor_dev_attr_temp8_input.dev_attr.attr,
397 &sensor_dev_attr_temp1_fault.dev_attr.attr,
398 &sensor_dev_attr_temp2_fault.dev_attr.attr,
399 &sensor_dev_attr_temp3_fault.dev_attr.attr,
400 &sensor_dev_attr_temp4_fault.dev_attr.attr,
401 &sensor_dev_attr_temp5_fault.dev_attr.attr,
402 &sensor_dev_attr_temp6_fault.dev_attr.attr,
403 &sensor_dev_attr_temp7_fault.dev_attr.attr,
404 &sensor_dev_attr_temp8_fault.dev_attr.attr,
405 &sensor_dev_attr_temp1_max.dev_attr.attr,
406 &sensor_dev_attr_temp2_max.dev_attr.attr,
407 &sensor_dev_attr_temp3_max.dev_attr.attr,
408 &sensor_dev_attr_temp4_max.dev_attr.attr,
409 &sensor_dev_attr_temp5_max.dev_attr.attr,
410 &sensor_dev_attr_temp6_max.dev_attr.attr,
411 &sensor_dev_attr_temp7_max.dev_attr.attr,
412 &sensor_dev_attr_temp8_max.dev_attr.attr,
413 &sensor_dev_attr_temp1_crit.dev_attr.attr,
414 &sensor_dev_attr_temp2_crit.dev_attr.attr,
415 &sensor_dev_attr_temp3_crit.dev_attr.attr,
416 &sensor_dev_attr_temp4_crit.dev_attr.attr,
417 &sensor_dev_attr_temp5_crit.dev_attr.attr,
418 &sensor_dev_attr_temp6_crit.dev_attr.attr,
419 &sensor_dev_attr_temp7_crit.dev_attr.attr,
420 &sensor_dev_attr_temp8_crit.dev_attr.attr,
421
422 &sensor_dev_attr_fan1_input.dev_attr.attr,
423 &sensor_dev_attr_fan2_input.dev_attr.attr,
424 &sensor_dev_attr_fan3_input.dev_attr.attr,
425 &sensor_dev_attr_fan4_input.dev_attr.attr,
426 &sensor_dev_attr_fan1_fault.dev_attr.attr,
427 &sensor_dev_attr_fan2_fault.dev_attr.attr,
428 &sensor_dev_attr_fan3_fault.dev_attr.attr,
429 &sensor_dev_attr_fan4_fault.dev_attr.attr,
430 &sensor_dev_attr_fan1_min.dev_attr.attr,
431 &sensor_dev_attr_fan2_min.dev_attr.attr,
432 &sensor_dev_attr_fan3_min.dev_attr.attr,
433 &sensor_dev_attr_fan4_min.dev_attr.attr,
434
435 &sensor_dev_attr_in0_input.dev_attr.attr,
436 &sensor_dev_attr_in1_input.dev_attr.attr,
437 &sensor_dev_attr_in2_input.dev_attr.attr,
438 &sensor_dev_attr_in3_input.dev_attr.attr,
439 &sensor_dev_attr_in4_input.dev_attr.attr,
440 &sensor_dev_attr_in0_label.dev_attr.attr,
441 &sensor_dev_attr_in1_label.dev_attr.attr,
442 &sensor_dev_attr_in2_label.dev_attr.attr,
443 &sensor_dev_attr_in3_label.dev_attr.attr,
444 /* No in4_label as in4 is a generic input pin */
445
446 NULL
447};
448
449static const struct attribute_group sch5627_group = {
450 .attrs = sch5627_attributes,
451};
452
453static int sch5627_remove(struct platform_device *pdev)
454{
455 struct sch5627_data *data = platform_get_drvdata(pdev);
456
457 if (data->watchdog)
458 sch56xx_watchdog_unregister(data->watchdog);
459
460 if (data->hwmon_dev)
461 hwmon_device_unregister(data->hwmon_dev);
462
463 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
464 platform_set_drvdata(pdev, NULL);
465 kfree(data);
466
467 return 0;
468}
469
470static int __devinit sch5627_probe(struct platform_device *pdev)
471{
472 struct sch5627_data *data;
473 int err, build_code, build_id, hwmon_rev, val;
474
475 data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL);
476 if (!data)
477 return -ENOMEM;
478
479 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
480 mutex_init(&data->update_lock);
481 platform_set_drvdata(pdev, data);
482
483 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
484 if (val < 0) {
485 err = val;
486 goto error;
487 }
488 if (val != SCH5627_HWMON_ID) {
489 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
490 val, SCH5627_HWMON_ID);
491 err = -ENODEV;
492 goto error;
493 }
494
495 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
496 if (val < 0) {
497 err = val;
498 goto error;
499 }
500 if (val != SCH5627_COMPANY_ID) {
501 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
502 val, SCH5627_COMPANY_ID);
503 err = -ENODEV;
504 goto error;
505 }
506
507 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
508 if (val < 0) {
509 err = val;
510 goto error;
511 }
512 if (val != SCH5627_PRIMARY_ID) {
513 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
514 val, SCH5627_PRIMARY_ID);
515 err = -ENODEV;
516 goto error;
517 }
518
519 build_code = sch56xx_read_virtual_reg(data->addr,
520 SCH5627_REG_BUILD_CODE);
521 if (build_code < 0) {
522 err = build_code;
523 goto error;
524 }
525
526 build_id = sch56xx_read_virtual_reg16(data->addr,
527 SCH5627_REG_BUILD_ID);
528 if (build_id < 0) {
529 err = build_id;
530 goto error;
531 }
532
533 hwmon_rev = sch56xx_read_virtual_reg(data->addr,
534 SCH5627_REG_HWMON_REV);
535 if (hwmon_rev < 0) {
536 err = hwmon_rev;
537 goto error;
538 }
539
540 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
541 if (val < 0) {
542 err = val;
543 goto error;
544 }
545 data->control = val;
546 if (!(data->control & 0x01)) {
547 pr_err("hardware monitoring not enabled\n");
548 err = -ENODEV;
549 goto error;
550 }
551 /* Trigger a Vbat voltage measurement, so that we get a valid reading
552 the first time we read Vbat */
553 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
554 data->control | 0x10);
555 data->last_battery = jiffies;
556
557 /*
558 * Read limits, we do this only once as reading a register on
559 * the sch5627 is quite expensive (and they don't change).
560 */
561 err = sch5627_read_limits(data);
562 if (err)
563 goto error;
564
565 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
566 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
567 build_code, build_id, hwmon_rev);
568
569 /* Register sysfs interface files */
570 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
571 if (err)
572 goto error;
573
574 data->hwmon_dev = hwmon_device_register(&pdev->dev);
575 if (IS_ERR(data->hwmon_dev)) {
576 err = PTR_ERR(data->hwmon_dev);
577 data->hwmon_dev = NULL;
578 goto error;
579 }
580
581 /* Note failing to register the watchdog is not a fatal error */
582 data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
583 (build_code << 24) | (build_id << 8) | hwmon_rev,
584 &data->update_lock, 1);
585
586 return 0;
587
588error:
589 sch5627_remove(pdev);
590 return err;
591}
592
593static struct platform_driver sch5627_driver = {
594 .driver = {
595 .owner = THIS_MODULE,
596 .name = DRVNAME,
597 },
598 .probe = sch5627_probe,
599 .remove = sch5627_remove,
600};
601
602module_platform_driver(sch5627_driver);
603
604MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
605MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
606MODULE_LICENSE("GPL");