1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /***************************************************************************
3 * Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *
5 ***************************************************************************/
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/jiffies.h>
13 #include <linux/platform_device.h>
14 #include <linux/hwmon.h>
15 #include <linux/hwmon-sysfs.h>
16 #include <linux/err.h>
17 #include <linux/mutex.h>
18 #include "sch56xx-common.h"
20 #define DRVNAME "sch5636"
21 #define DEVNAME "theseus" /* We only support one model for now */
23 #define SCH5636_REG_FUJITSU_ID 0x780
24 #define SCH5636_REG_FUJITSU_REV 0x783
26 #define SCH5636_NO_INS 5
27 #define SCH5636_NO_TEMPS 16
28 #define SCH5636_NO_FANS 8
30 static const u16 SCH5636_REG_IN_VAL
[SCH5636_NO_INS
] = {
31 0x22, 0x23, 0x24, 0x25, 0x189 };
32 static const u16 SCH5636_REG_IN_FACTORS
[SCH5636_NO_INS
] = {
33 4400, 1500, 4000, 4400, 16000 };
34 static const char * const SCH5636_IN_LABELS
[SCH5636_NO_INS
] = {
35 "3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
37 static const u16 SCH5636_REG_TEMP_VAL
[SCH5636_NO_TEMPS
] = {
38 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
39 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
40 #define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
41 #define SCH5636_TEMP_WORKING 0x01
42 #define SCH5636_TEMP_ALARM 0x02
43 #define SCH5636_TEMP_DEACTIVATED 0x80
45 static const u16 SCH5636_REG_FAN_VAL
[SCH5636_NO_FANS
] = {
46 0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
47 #define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
48 /* FAULT in datasheet, but acts as an alarm */
49 #define SCH5636_FAN_ALARM 0x04
50 #define SCH5636_FAN_NOT_PRESENT 0x08
51 #define SCH5636_FAN_DEACTIVATED 0x80
56 struct device
*hwmon_dev
;
58 struct mutex update_lock
;
59 char valid
; /* !=0 if following fields are valid */
60 unsigned long last_updated
; /* In jiffies */
61 u8 in
[SCH5636_NO_INS
];
62 u8 temp_val
[SCH5636_NO_TEMPS
];
63 u8 temp_ctrl
[SCH5636_NO_TEMPS
];
64 u16 fan_val
[SCH5636_NO_FANS
];
65 u8 fan_ctrl
[SCH5636_NO_FANS
];
68 static struct sch5636_data
*sch5636_update_device(struct device
*dev
)
70 struct sch5636_data
*data
= dev_get_drvdata(dev
);
71 struct sch5636_data
*ret
= data
;
74 mutex_lock(&data
->update_lock
);
76 /* Cache the values for 1 second */
77 if (data
->valid
&& !time_after(jiffies
, data
->last_updated
+ HZ
))
80 for (i
= 0; i
< SCH5636_NO_INS
; i
++) {
81 val
= sch56xx_read_virtual_reg(data
->addr
,
82 SCH5636_REG_IN_VAL
[i
]);
83 if (unlikely(val
< 0)) {
90 for (i
= 0; i
< SCH5636_NO_TEMPS
; i
++) {
91 if (data
->temp_ctrl
[i
] & SCH5636_TEMP_DEACTIVATED
)
94 val
= sch56xx_read_virtual_reg(data
->addr
,
95 SCH5636_REG_TEMP_VAL
[i
]);
96 if (unlikely(val
< 0)) {
100 data
->temp_val
[i
] = val
;
102 val
= sch56xx_read_virtual_reg(data
->addr
,
103 SCH5636_REG_TEMP_CTRL(i
));
104 if (unlikely(val
< 0)) {
108 data
->temp_ctrl
[i
] = val
;
109 /* Alarms need to be explicitly write-cleared */
110 if (val
& SCH5636_TEMP_ALARM
) {
111 sch56xx_write_virtual_reg(data
->addr
,
112 SCH5636_REG_TEMP_CTRL(i
), val
);
116 for (i
= 0; i
< SCH5636_NO_FANS
; i
++) {
117 if (data
->fan_ctrl
[i
] & SCH5636_FAN_DEACTIVATED
)
120 val
= sch56xx_read_virtual_reg16(data
->addr
,
121 SCH5636_REG_FAN_VAL
[i
]);
122 if (unlikely(val
< 0)) {
126 data
->fan_val
[i
] = val
;
128 val
= sch56xx_read_virtual_reg(data
->addr
,
129 SCH5636_REG_FAN_CTRL(i
));
130 if (unlikely(val
< 0)) {
134 data
->fan_ctrl
[i
] = val
;
135 /* Alarms need to be explicitly write-cleared */
136 if (val
& SCH5636_FAN_ALARM
) {
137 sch56xx_write_virtual_reg(data
->addr
,
138 SCH5636_REG_FAN_CTRL(i
), val
);
142 data
->last_updated
= jiffies
;
145 mutex_unlock(&data
->update_lock
);
149 static int reg_to_rpm(u16 reg
)
156 return 5400540 / reg
;
159 static ssize_t
name_show(struct device
*dev
, struct device_attribute
*devattr
,
162 return sysfs_emit(buf
, "%s\n", DEVNAME
);
165 static ssize_t
in_value_show(struct device
*dev
,
166 struct device_attribute
*devattr
, char *buf
)
168 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
169 struct sch5636_data
*data
= sch5636_update_device(dev
);
173 return PTR_ERR(data
);
175 val
= DIV_ROUND_CLOSEST(
176 data
->in
[attr
->index
] * SCH5636_REG_IN_FACTORS
[attr
->index
],
178 return sysfs_emit(buf
, "%d\n", val
);
181 static ssize_t
in_label_show(struct device
*dev
,
182 struct device_attribute
*devattr
, char *buf
)
184 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
186 return sysfs_emit(buf
, "%s\n",
187 SCH5636_IN_LABELS
[attr
->index
]);
190 static ssize_t
temp_value_show(struct device
*dev
,
191 struct device_attribute
*devattr
, char *buf
)
193 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
194 struct sch5636_data
*data
= sch5636_update_device(dev
);
198 return PTR_ERR(data
);
200 val
= (data
->temp_val
[attr
->index
] - 64) * 1000;
201 return sysfs_emit(buf
, "%d\n", val
);
204 static ssize_t
temp_fault_show(struct device
*dev
,
205 struct device_attribute
*devattr
, char *buf
)
207 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
208 struct sch5636_data
*data
= sch5636_update_device(dev
);
212 return PTR_ERR(data
);
214 val
= (data
->temp_ctrl
[attr
->index
] & SCH5636_TEMP_WORKING
) ? 0 : 1;
215 return sysfs_emit(buf
, "%d\n", val
);
218 static ssize_t
temp_alarm_show(struct device
*dev
,
219 struct device_attribute
*devattr
, char *buf
)
221 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
222 struct sch5636_data
*data
= sch5636_update_device(dev
);
226 return PTR_ERR(data
);
228 val
= (data
->temp_ctrl
[attr
->index
] & SCH5636_TEMP_ALARM
) ? 1 : 0;
229 return sysfs_emit(buf
, "%d\n", val
);
232 static ssize_t
fan_value_show(struct device
*dev
,
233 struct device_attribute
*devattr
, char *buf
)
235 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
236 struct sch5636_data
*data
= sch5636_update_device(dev
);
240 return PTR_ERR(data
);
242 val
= reg_to_rpm(data
->fan_val
[attr
->index
]);
246 return sysfs_emit(buf
, "%d\n", val
);
249 static ssize_t
fan_fault_show(struct device
*dev
,
250 struct device_attribute
*devattr
, char *buf
)
252 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
253 struct sch5636_data
*data
= sch5636_update_device(dev
);
257 return PTR_ERR(data
);
259 val
= (data
->fan_ctrl
[attr
->index
] & SCH5636_FAN_NOT_PRESENT
) ? 1 : 0;
260 return sysfs_emit(buf
, "%d\n", val
);
263 static ssize_t
fan_alarm_show(struct device
*dev
,
264 struct device_attribute
*devattr
, char *buf
)
266 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
267 struct sch5636_data
*data
= sch5636_update_device(dev
);
271 return PTR_ERR(data
);
273 val
= (data
->fan_ctrl
[attr
->index
] & SCH5636_FAN_ALARM
) ? 1 : 0;
274 return sysfs_emit(buf
, "%d\n", val
);
277 static struct sensor_device_attribute sch5636_attr
[] = {
278 SENSOR_ATTR_RO(name
, name
, 0),
279 SENSOR_ATTR_RO(in0_input
, in_value
, 0),
280 SENSOR_ATTR_RO(in0_label
, in_label
, 0),
281 SENSOR_ATTR_RO(in1_input
, in_value
, 1),
282 SENSOR_ATTR_RO(in1_label
, in_label
, 1),
283 SENSOR_ATTR_RO(in2_input
, in_value
, 2),
284 SENSOR_ATTR_RO(in2_label
, in_label
, 2),
285 SENSOR_ATTR_RO(in3_input
, in_value
, 3),
286 SENSOR_ATTR_RO(in3_label
, in_label
, 3),
287 SENSOR_ATTR_RO(in4_input
, in_value
, 4),
288 SENSOR_ATTR_RO(in4_label
, in_label
, 4),
291 static struct sensor_device_attribute sch5636_temp_attr
[] = {
292 SENSOR_ATTR_RO(temp1_input
, temp_value
, 0),
293 SENSOR_ATTR_RO(temp1_fault
, temp_fault
, 0),
294 SENSOR_ATTR_RO(temp1_alarm
, temp_alarm
, 0),
295 SENSOR_ATTR_RO(temp2_input
, temp_value
, 1),
296 SENSOR_ATTR_RO(temp2_fault
, temp_fault
, 1),
297 SENSOR_ATTR_RO(temp2_alarm
, temp_alarm
, 1),
298 SENSOR_ATTR_RO(temp3_input
, temp_value
, 2),
299 SENSOR_ATTR_RO(temp3_fault
, temp_fault
, 2),
300 SENSOR_ATTR_RO(temp3_alarm
, temp_alarm
, 2),
301 SENSOR_ATTR_RO(temp4_input
, temp_value
, 3),
302 SENSOR_ATTR_RO(temp4_fault
, temp_fault
, 3),
303 SENSOR_ATTR_RO(temp4_alarm
, temp_alarm
, 3),
304 SENSOR_ATTR_RO(temp5_input
, temp_value
, 4),
305 SENSOR_ATTR_RO(temp5_fault
, temp_fault
, 4),
306 SENSOR_ATTR_RO(temp5_alarm
, temp_alarm
, 4),
307 SENSOR_ATTR_RO(temp6_input
, temp_value
, 5),
308 SENSOR_ATTR_RO(temp6_fault
, temp_fault
, 5),
309 SENSOR_ATTR_RO(temp6_alarm
, temp_alarm
, 5),
310 SENSOR_ATTR_RO(temp7_input
, temp_value
, 6),
311 SENSOR_ATTR_RO(temp7_fault
, temp_fault
, 6),
312 SENSOR_ATTR_RO(temp7_alarm
, temp_alarm
, 6),
313 SENSOR_ATTR_RO(temp8_input
, temp_value
, 7),
314 SENSOR_ATTR_RO(temp8_fault
, temp_fault
, 7),
315 SENSOR_ATTR_RO(temp8_alarm
, temp_alarm
, 7),
316 SENSOR_ATTR_RO(temp9_input
, temp_value
, 8),
317 SENSOR_ATTR_RO(temp9_fault
, temp_fault
, 8),
318 SENSOR_ATTR_RO(temp9_alarm
, temp_alarm
, 8),
319 SENSOR_ATTR_RO(temp10_input
, temp_value
, 9),
320 SENSOR_ATTR_RO(temp10_fault
, temp_fault
, 9),
321 SENSOR_ATTR_RO(temp10_alarm
, temp_alarm
, 9),
322 SENSOR_ATTR_RO(temp11_input
, temp_value
, 10),
323 SENSOR_ATTR_RO(temp11_fault
, temp_fault
, 10),
324 SENSOR_ATTR_RO(temp11_alarm
, temp_alarm
, 10),
325 SENSOR_ATTR_RO(temp12_input
, temp_value
, 11),
326 SENSOR_ATTR_RO(temp12_fault
, temp_fault
, 11),
327 SENSOR_ATTR_RO(temp12_alarm
, temp_alarm
, 11),
328 SENSOR_ATTR_RO(temp13_input
, temp_value
, 12),
329 SENSOR_ATTR_RO(temp13_fault
, temp_fault
, 12),
330 SENSOR_ATTR_RO(temp13_alarm
, temp_alarm
, 12),
331 SENSOR_ATTR_RO(temp14_input
, temp_value
, 13),
332 SENSOR_ATTR_RO(temp14_fault
, temp_fault
, 13),
333 SENSOR_ATTR_RO(temp14_alarm
, temp_alarm
, 13),
334 SENSOR_ATTR_RO(temp15_input
, temp_value
, 14),
335 SENSOR_ATTR_RO(temp15_fault
, temp_fault
, 14),
336 SENSOR_ATTR_RO(temp15_alarm
, temp_alarm
, 14),
337 SENSOR_ATTR_RO(temp16_input
, temp_value
, 15),
338 SENSOR_ATTR_RO(temp16_fault
, temp_fault
, 15),
339 SENSOR_ATTR_RO(temp16_alarm
, temp_alarm
, 15),
342 static struct sensor_device_attribute sch5636_fan_attr
[] = {
343 SENSOR_ATTR_RO(fan1_input
, fan_value
, 0),
344 SENSOR_ATTR_RO(fan1_fault
, fan_fault
, 0),
345 SENSOR_ATTR_RO(fan1_alarm
, fan_alarm
, 0),
346 SENSOR_ATTR_RO(fan2_input
, fan_value
, 1),
347 SENSOR_ATTR_RO(fan2_fault
, fan_fault
, 1),
348 SENSOR_ATTR_RO(fan2_alarm
, fan_alarm
, 1),
349 SENSOR_ATTR_RO(fan3_input
, fan_value
, 2),
350 SENSOR_ATTR_RO(fan3_fault
, fan_fault
, 2),
351 SENSOR_ATTR_RO(fan3_alarm
, fan_alarm
, 2),
352 SENSOR_ATTR_RO(fan4_input
, fan_value
, 3),
353 SENSOR_ATTR_RO(fan4_fault
, fan_fault
, 3),
354 SENSOR_ATTR_RO(fan4_alarm
, fan_alarm
, 3),
355 SENSOR_ATTR_RO(fan5_input
, fan_value
, 4),
356 SENSOR_ATTR_RO(fan5_fault
, fan_fault
, 4),
357 SENSOR_ATTR_RO(fan5_alarm
, fan_alarm
, 4),
358 SENSOR_ATTR_RO(fan6_input
, fan_value
, 5),
359 SENSOR_ATTR_RO(fan6_fault
, fan_fault
, 5),
360 SENSOR_ATTR_RO(fan6_alarm
, fan_alarm
, 5),
361 SENSOR_ATTR_RO(fan7_input
, fan_value
, 6),
362 SENSOR_ATTR_RO(fan7_fault
, fan_fault
, 6),
363 SENSOR_ATTR_RO(fan7_alarm
, fan_alarm
, 6),
364 SENSOR_ATTR_RO(fan8_input
, fan_value
, 7),
365 SENSOR_ATTR_RO(fan8_fault
, fan_fault
, 7),
366 SENSOR_ATTR_RO(fan8_alarm
, fan_alarm
, 7),
369 static int sch5636_remove(struct platform_device
*pdev
)
371 struct sch5636_data
*data
= platform_get_drvdata(pdev
);
375 hwmon_device_unregister(data
->hwmon_dev
);
377 for (i
= 0; i
< ARRAY_SIZE(sch5636_attr
); i
++)
378 device_remove_file(&pdev
->dev
, &sch5636_attr
[i
].dev_attr
);
380 for (i
= 0; i
< SCH5636_NO_TEMPS
* 3; i
++)
381 device_remove_file(&pdev
->dev
,
382 &sch5636_temp_attr
[i
].dev_attr
);
384 for (i
= 0; i
< SCH5636_NO_FANS
* 3; i
++)
385 device_remove_file(&pdev
->dev
,
386 &sch5636_fan_attr
[i
].dev_attr
);
391 static int sch5636_probe(struct platform_device
*pdev
)
393 struct sch5636_data
*data
;
394 int i
, err
, val
, revision
[2];
397 data
= devm_kzalloc(&pdev
->dev
, sizeof(struct sch5636_data
),
402 data
->addr
= platform_get_resource(pdev
, IORESOURCE_IO
, 0)->start
;
403 mutex_init(&data
->update_lock
);
404 platform_set_drvdata(pdev
, data
);
406 for (i
= 0; i
< 3; i
++) {
407 val
= sch56xx_read_virtual_reg(data
->addr
,
408 SCH5636_REG_FUJITSU_ID
+ i
);
410 pr_err("Could not read Fujitsu id byte at %#x\n",
411 SCH5636_REG_FUJITSU_ID
+ i
);
419 if (strcmp(id
, "THS")) {
420 pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
421 id
[0], id
[1], id
[2]);
426 for (i
= 0; i
< 2; i
++) {
427 val
= sch56xx_read_virtual_reg(data
->addr
,
428 SCH5636_REG_FUJITSU_REV
+ i
);
435 pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME
,
436 data
->addr
, revision
[0], revision
[1]);
438 /* Read all temp + fan ctrl registers to determine which are active */
439 for (i
= 0; i
< SCH5636_NO_TEMPS
; i
++) {
440 val
= sch56xx_read_virtual_reg(data
->addr
,
441 SCH5636_REG_TEMP_CTRL(i
));
442 if (unlikely(val
< 0)) {
446 data
->temp_ctrl
[i
] = val
;
449 for (i
= 0; i
< SCH5636_NO_FANS
; i
++) {
450 val
= sch56xx_read_virtual_reg(data
->addr
,
451 SCH5636_REG_FAN_CTRL(i
));
452 if (unlikely(val
< 0)) {
456 data
->fan_ctrl
[i
] = val
;
459 for (i
= 0; i
< ARRAY_SIZE(sch5636_attr
); i
++) {
460 err
= device_create_file(&pdev
->dev
,
461 &sch5636_attr
[i
].dev_attr
);
466 for (i
= 0; i
< (SCH5636_NO_TEMPS
* 3); i
++) {
467 if (data
->temp_ctrl
[i
/3] & SCH5636_TEMP_DEACTIVATED
)
470 err
= device_create_file(&pdev
->dev
,
471 &sch5636_temp_attr
[i
].dev_attr
);
476 for (i
= 0; i
< (SCH5636_NO_FANS
* 3); i
++) {
477 if (data
->fan_ctrl
[i
/3] & SCH5636_FAN_DEACTIVATED
)
480 err
= device_create_file(&pdev
->dev
,
481 &sch5636_fan_attr
[i
].dev_attr
);
486 data
->hwmon_dev
= hwmon_device_register(&pdev
->dev
);
487 if (IS_ERR(data
->hwmon_dev
)) {
488 err
= PTR_ERR(data
->hwmon_dev
);
489 data
->hwmon_dev
= NULL
;
493 /* Note failing to register the watchdog is not a fatal error */
494 sch56xx_watchdog_register(&pdev
->dev
, data
->addr
, (revision
[0] << 8) | revision
[1],
495 &data
->update_lock
, 0);
500 sch5636_remove(pdev
);
504 static struct platform_driver sch5636_driver
= {
508 .probe
= sch5636_probe
,
509 .remove
= sch5636_remove
,
512 module_platform_driver(sch5636_driver
);
514 MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
515 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
516 MODULE_LICENSE("GPL");