1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * sis5595.c - Part of lm_sensors, Linux kernel modules
4 * for hardware monitoring
5 *
6 * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
7 * Kyösti Mälkki <kmalkki@cc.hut.fi>, and
8 * Mark D. Studebaker <mdsxyz123@yahoo.com>
9 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
10 * the help of Jean Delvare <jdelvare@suse.de>
11 */
12
13 /*
14 * SiS southbridge has a LM78-like chip integrated on the same IC.
15 * This driver is a customized copy of lm78.c
16 *
17 * Supports following revisions:
18 * Version PCI ID PCI Revision
19 * 1 1039/0008 AF or less
20 * 2 1039/0008 B0 or greater
21 *
22 * Note: these chips contain a 0008 device which is incompatible with the
23 * 5595. We recognize these by the presence of the listed
24 * "blacklist" PCI ID and refuse to load.
25 *
26 * NOT SUPPORTED PCI ID BLACKLIST PCI ID
27 * 540 0008 0540
28 * 550 0008 0550
29 * 5513 0008 5511
30 * 5581 0008 5597
31 * 5582 0008 5597
32 * 5597 0008 5597
33 * 5598 0008 5597/5598
34 * 630 0008 0630
35 * 645 0008 0645
36 * 730 0008 0730
37 * 735 0008 0735
38 */
39
40 #define DRIVER_NAME "sis5595"
41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
43 #include <linux/module.h>
44 #include <linux/slab.h>
45 #include <linux/ioport.h>
46 #include <linux/pci.h>
47 #include <linux/platform_device.h>
48 #include <linux/hwmon.h>
49 #include <linux/hwmon-sysfs.h>
50 #include <linux/err.h>
51 #include <linux/init.h>
52 #include <linux/jiffies.h>
53 #include <linux/mutex.h>
54 #include <linux/sysfs.h>
55 #include <linux/acpi.h>
56 #include <linux/io.h>
57
58 /*
59 * If force_addr is set to anything different from 0, we forcibly enable
60 * the device at the given address.
61 */
62 static u16 force_addr;
63 module_param(force_addr, ushort, 0);
64 MODULE_PARM_DESC(force_addr,
65 "Initialize the base address of the sensors");
66
67 static struct platform_device *pdev;
68
69 /* Many SIS5595 constants specified below */
70
71 /* Length of ISA address segment */
72 #define SIS5595_EXTENT 8
73 /* PCI Config Registers */
74 #define SIS5595_BASE_REG 0x68
75 #define SIS5595_PIN_REG 0x7A
76 #define SIS5595_ENABLE_REG 0x7B
77
78 /* Where are the ISA address/data registers relative to the base address */
79 #define SIS5595_ADDR_REG_OFFSET 5
80 #define SIS5595_DATA_REG_OFFSET 6
81
82 /* The SIS5595 registers */
83 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
84 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
85 #define SIS5595_REG_IN(nr) (0x20 + (nr))
86
87 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
88 #define SIS5595_REG_FAN(nr) (0x28 + (nr))
89
90 /*
91 * On the first version of the chip, the temp registers are separate.
92 * On the second version,
93 * TEMP pin is shared with IN4, configured in PCI register 0x7A.
94 * The registers are the same as well.
95 * OVER and HYST are really MAX and MIN.
96 */
97
98 #define REV2MIN 0xb0
99 #define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
100 SIS5595_REG_IN(4) : 0x27)
101 #define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
102 SIS5595_REG_IN_MAX(4) : 0x39)
103 #define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
104 SIS5595_REG_IN_MIN(4) : 0x3a)
105
106 #define SIS5595_REG_CONFIG 0x40
107 #define SIS5595_REG_ALARM1 0x41
108 #define SIS5595_REG_ALARM2 0x42
109 #define SIS5595_REG_FANDIV 0x47
110
111 /*
112 * Conversions. Limit checking is only done on the TO_REG
113 * variants.
114 */
115
116 /*
117 * IN: mV, (0V to 4.08V)
118 * REG: 16mV/bit
119 */
IN_TO_REG(unsigned long val)120 static inline u8 IN_TO_REG(unsigned long val)
121 {
122 unsigned long nval = clamp_val(val, 0, 4080);
123 return (nval + 8) / 16;
124 }
125 #define IN_FROM_REG(val) ((val) * 16)
126
FAN_TO_REG(long rpm,int div)127 static inline u8 FAN_TO_REG(long rpm, int div)
128 {
129 if (rpm <= 0)
130 return 255;
131 if (rpm > 1350000)
132 return 1;
133 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
134 }
135
FAN_FROM_REG(u8 val,int div)136 static inline int FAN_FROM_REG(u8 val, int div)
137 {
138 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
139 }
140
141 /*
142 * TEMP: mC (-54.12C to +157.53C)
143 * REG: 0.83C/bit + 52.12, two's complement
144 */
TEMP_FROM_REG(s8 val)145 static inline int TEMP_FROM_REG(s8 val)
146 {
147 return val * 830 + 52120;
148 }
TEMP_TO_REG(long val)149 static inline s8 TEMP_TO_REG(long val)
150 {
151 int nval = clamp_val(val, -54120, 157530) ;
152 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
153 }
154
155 /*
156 * FAN DIV: 1, 2, 4, or 8
157 * REG: 0, 1, 2, or 3 (respectively)
158 */
159 #define DIV_FROM_REG(val) (1 << (val))
160
161 /*
162 * For each registered chip, we need to keep some data in memory.
163 * The structure is dynamically allocated.
164 */
165 struct sis5595_data {
166 unsigned short addr;
167 const char *name;
168 struct device *hwmon_dev;
169 struct mutex lock;
170
171 struct mutex update_lock;
172 bool valid; /* true if following fields are valid */
173 unsigned long last_updated; /* In jiffies */
174 char maxins; /* == 3 if temp enabled, otherwise == 4 */
175 u8 revision; /* Reg. value */
176
177 u8 in[5]; /* Register value */
178 u8 in_max[5]; /* Register value */
179 u8 in_min[5]; /* Register value */
180 u8 fan[2]; /* Register value */
181 u8 fan_min[2]; /* Register value */
182 s8 temp; /* Register value */
183 s8 temp_over; /* Register value */
184 s8 temp_hyst; /* Register value */
185 u8 fan_div[2]; /* Register encoding, shifted right */
186 u16 alarms; /* Register encoding, combined */
187 };
188
189 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
190
191 /* ISA access must be locked explicitly. */
sis5595_read_value(struct sis5595_data * data,u8 reg)192 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
193 {
194 int res;
195
196 mutex_lock(&data->lock);
197 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
198 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
199 mutex_unlock(&data->lock);
200 return res;
201 }
202
sis5595_write_value(struct sis5595_data * data,u8 reg,u8 value)203 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
204 {
205 mutex_lock(&data->lock);
206 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
207 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
208 mutex_unlock(&data->lock);
209 }
210
sis5595_update_device(struct device * dev)211 static struct sis5595_data *sis5595_update_device(struct device *dev)
212 {
213 struct sis5595_data *data = dev_get_drvdata(dev);
214 int i;
215
216 mutex_lock(&data->update_lock);
217
218 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
219 || !data->valid) {
220
221 for (i = 0; i <= data->maxins; i++) {
222 data->in[i] =
223 sis5595_read_value(data, SIS5595_REG_IN(i));
224 data->in_min[i] =
225 sis5595_read_value(data,
226 SIS5595_REG_IN_MIN(i));
227 data->in_max[i] =
228 sis5595_read_value(data,
229 SIS5595_REG_IN_MAX(i));
230 }
231 for (i = 0; i < 2; i++) {
232 data->fan[i] =
233 sis5595_read_value(data, SIS5595_REG_FAN(i));
234 data->fan_min[i] =
235 sis5595_read_value(data,
236 SIS5595_REG_FAN_MIN(i));
237 }
238 if (data->maxins == 3) {
239 data->temp =
240 sis5595_read_value(data, SIS5595_REG_TEMP);
241 data->temp_over =
242 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
243 data->temp_hyst =
244 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
245 }
246 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
247 data->fan_div[0] = (i >> 4) & 0x03;
248 data->fan_div[1] = i >> 6;
249 data->alarms =
250 sis5595_read_value(data, SIS5595_REG_ALARM1) |
251 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
252 data->last_updated = jiffies;
253 data->valid = true;
254 }
255
256 mutex_unlock(&data->update_lock);
257
258 return data;
259 }
260
261 /* 4 Voltages */
in_show(struct device * dev,struct device_attribute * da,char * buf)262 static ssize_t in_show(struct device *dev, struct device_attribute *da,
263 char *buf)
264 {
265 struct sis5595_data *data = sis5595_update_device(dev);
266 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
267 int nr = attr->index;
268 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
269 }
270
in_min_show(struct device * dev,struct device_attribute * da,char * buf)271 static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
272 char *buf)
273 {
274 struct sis5595_data *data = sis5595_update_device(dev);
275 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
276 int nr = attr->index;
277 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
278 }
279
in_max_show(struct device * dev,struct device_attribute * da,char * buf)280 static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
281 char *buf)
282 {
283 struct sis5595_data *data = sis5595_update_device(dev);
284 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
285 int nr = attr->index;
286 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
287 }
288
in_min_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)289 static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
290 const char *buf, size_t count)
291 {
292 struct sis5595_data *data = dev_get_drvdata(dev);
293 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
294 int nr = attr->index;
295 unsigned long val;
296 int err;
297
298 err = kstrtoul(buf, 10, &val);
299 if (err)
300 return err;
301
302 mutex_lock(&data->update_lock);
303 data->in_min[nr] = IN_TO_REG(val);
304 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
305 mutex_unlock(&data->update_lock);
306 return count;
307 }
308
in_max_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)309 static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
310 const char *buf, size_t count)
311 {
312 struct sis5595_data *data = dev_get_drvdata(dev);
313 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
314 int nr = attr->index;
315 unsigned long val;
316 int err;
317
318 err = kstrtoul(buf, 10, &val);
319 if (err)
320 return err;
321
322 mutex_lock(&data->update_lock);
323 data->in_max[nr] = IN_TO_REG(val);
324 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
325 mutex_unlock(&data->update_lock);
326 return count;
327 }
328
329 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
330 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
331 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
332 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
333 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
334 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
335 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
336 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
337 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
338 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
339 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
340 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
341 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
342 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
343 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
344
345 /* Temperature */
temp1_input_show(struct device * dev,struct device_attribute * attr,char * buf)346 static ssize_t temp1_input_show(struct device *dev,
347 struct device_attribute *attr, char *buf)
348 {
349 struct sis5595_data *data = sis5595_update_device(dev);
350 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
351 }
352
temp1_max_show(struct device * dev,struct device_attribute * attr,char * buf)353 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
354 char *buf)
355 {
356 struct sis5595_data *data = sis5595_update_device(dev);
357 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
358 }
359
temp1_max_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)360 static ssize_t temp1_max_store(struct device *dev,
361 struct device_attribute *attr, const char *buf,
362 size_t count)
363 {
364 struct sis5595_data *data = dev_get_drvdata(dev);
365 long val;
366 int err;
367
368 err = kstrtol(buf, 10, &val);
369 if (err)
370 return err;
371
372 mutex_lock(&data->update_lock);
373 data->temp_over = TEMP_TO_REG(val);
374 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
375 mutex_unlock(&data->update_lock);
376 return count;
377 }
378
temp1_max_hyst_show(struct device * dev,struct device_attribute * attr,char * buf)379 static ssize_t temp1_max_hyst_show(struct device *dev,
380 struct device_attribute *attr, char *buf)
381 {
382 struct sis5595_data *data = sis5595_update_device(dev);
383 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
384 }
385
temp1_max_hyst_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)386 static ssize_t temp1_max_hyst_store(struct device *dev,
387 struct device_attribute *attr,
388 const char *buf, size_t count)
389 {
390 struct sis5595_data *data = dev_get_drvdata(dev);
391 long val;
392 int err;
393
394 err = kstrtol(buf, 10, &val);
395 if (err)
396 return err;
397
398 mutex_lock(&data->update_lock);
399 data->temp_hyst = TEMP_TO_REG(val);
400 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
401 mutex_unlock(&data->update_lock);
402 return count;
403 }
404
405 static DEVICE_ATTR_RO(temp1_input);
406 static DEVICE_ATTR_RW(temp1_max);
407 static DEVICE_ATTR_RW(temp1_max_hyst);
408
409 /* 2 Fans */
fan_show(struct device * dev,struct device_attribute * da,char * buf)410 static ssize_t fan_show(struct device *dev, struct device_attribute *da,
411 char *buf)
412 {
413 struct sis5595_data *data = sis5595_update_device(dev);
414 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
415 int nr = attr->index;
416 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
417 DIV_FROM_REG(data->fan_div[nr])));
418 }
419
fan_min_show(struct device * dev,struct device_attribute * da,char * buf)420 static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
421 char *buf)
422 {
423 struct sis5595_data *data = sis5595_update_device(dev);
424 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
425 int nr = attr->index;
426 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
427 DIV_FROM_REG(data->fan_div[nr])));
428 }
429
fan_min_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)430 static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,
431 const char *buf, size_t count)
432 {
433 struct sis5595_data *data = dev_get_drvdata(dev);
434 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
435 int nr = attr->index;
436 unsigned long val;
437 int err;
438
439 err = kstrtoul(buf, 10, &val);
440 if (err)
441 return err;
442
443 mutex_lock(&data->update_lock);
444 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
445 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
446 mutex_unlock(&data->update_lock);
447 return count;
448 }
449
fan_div_show(struct device * dev,struct device_attribute * da,char * buf)450 static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
451 char *buf)
452 {
453 struct sis5595_data *data = sis5595_update_device(dev);
454 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
455 int nr = attr->index;
456 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
457 }
458
459 /*
460 * Note: we save and restore the fan minimum here, because its value is
461 * determined in part by the fan divisor. This follows the principle of
462 * least surprise; the user doesn't expect the fan minimum to change just
463 * because the divisor changed.
464 */
fan_div_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)465 static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,
466 const char *buf, size_t count)
467 {
468 struct sis5595_data *data = dev_get_drvdata(dev);
469 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
470 int nr = attr->index;
471 unsigned long min;
472 int reg;
473 unsigned long val;
474 int err;
475
476 err = kstrtoul(buf, 10, &val);
477 if (err)
478 return err;
479
480 mutex_lock(&data->update_lock);
481 min = FAN_FROM_REG(data->fan_min[nr],
482 DIV_FROM_REG(data->fan_div[nr]));
483 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
484
485 switch (val) {
486 case 1:
487 data->fan_div[nr] = 0;
488 break;
489 case 2:
490 data->fan_div[nr] = 1;
491 break;
492 case 4:
493 data->fan_div[nr] = 2;
494 break;
495 case 8:
496 data->fan_div[nr] = 3;
497 break;
498 default:
499 dev_err(dev,
500 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
501 val);
502 mutex_unlock(&data->update_lock);
503 return -EINVAL;
504 }
505
506 switch (nr) {
507 case 0:
508 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
509 break;
510 case 1:
511 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
512 break;
513 }
514 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
515 data->fan_min[nr] =
516 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
517 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
518 mutex_unlock(&data->update_lock);
519 return count;
520 }
521
522 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
523 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
524 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
525 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
526 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
527 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
528
529 /* Alarms */
alarms_show(struct device * dev,struct device_attribute * attr,char * buf)530 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
531 char *buf)
532 {
533 struct sis5595_data *data = sis5595_update_device(dev);
534 return sprintf(buf, "%d\n", data->alarms);
535 }
536 static DEVICE_ATTR_RO(alarms);
537
alarm_show(struct device * dev,struct device_attribute * da,char * buf)538 static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
539 char *buf)
540 {
541 struct sis5595_data *data = sis5595_update_device(dev);
542 int nr = to_sensor_dev_attr(da)->index;
543 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
544 }
545 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
546 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
547 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
548 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
549 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
550 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
551 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
552 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
553
name_show(struct device * dev,struct device_attribute * attr,char * buf)554 static ssize_t name_show(struct device *dev, struct device_attribute *attr,
555 char *buf)
556 {
557 struct sis5595_data *data = dev_get_drvdata(dev);
558 return sprintf(buf, "%s\n", data->name);
559 }
560 static DEVICE_ATTR_RO(name);
561
562 static struct attribute *sis5595_attributes[] = {
563 &sensor_dev_attr_in0_input.dev_attr.attr,
564 &sensor_dev_attr_in0_min.dev_attr.attr,
565 &sensor_dev_attr_in0_max.dev_attr.attr,
566 &sensor_dev_attr_in0_alarm.dev_attr.attr,
567 &sensor_dev_attr_in1_input.dev_attr.attr,
568 &sensor_dev_attr_in1_min.dev_attr.attr,
569 &sensor_dev_attr_in1_max.dev_attr.attr,
570 &sensor_dev_attr_in1_alarm.dev_attr.attr,
571 &sensor_dev_attr_in2_input.dev_attr.attr,
572 &sensor_dev_attr_in2_min.dev_attr.attr,
573 &sensor_dev_attr_in2_max.dev_attr.attr,
574 &sensor_dev_attr_in2_alarm.dev_attr.attr,
575 &sensor_dev_attr_in3_input.dev_attr.attr,
576 &sensor_dev_attr_in3_min.dev_attr.attr,
577 &sensor_dev_attr_in3_max.dev_attr.attr,
578 &sensor_dev_attr_in3_alarm.dev_attr.attr,
579
580 &sensor_dev_attr_fan1_input.dev_attr.attr,
581 &sensor_dev_attr_fan1_min.dev_attr.attr,
582 &sensor_dev_attr_fan1_div.dev_attr.attr,
583 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
584 &sensor_dev_attr_fan2_input.dev_attr.attr,
585 &sensor_dev_attr_fan2_min.dev_attr.attr,
586 &sensor_dev_attr_fan2_div.dev_attr.attr,
587 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
588
589 &dev_attr_alarms.attr,
590 &dev_attr_name.attr,
591 NULL
592 };
593
594 static const struct attribute_group sis5595_group = {
595 .attrs = sis5595_attributes,
596 };
597
598 static struct attribute *sis5595_attributes_in4[] = {
599 &sensor_dev_attr_in4_input.dev_attr.attr,
600 &sensor_dev_attr_in4_min.dev_attr.attr,
601 &sensor_dev_attr_in4_max.dev_attr.attr,
602 &sensor_dev_attr_in4_alarm.dev_attr.attr,
603 NULL
604 };
605
606 static const struct attribute_group sis5595_group_in4 = {
607 .attrs = sis5595_attributes_in4,
608 };
609
610 static struct attribute *sis5595_attributes_temp1[] = {
611 &dev_attr_temp1_input.attr,
612 &dev_attr_temp1_max.attr,
613 &dev_attr_temp1_max_hyst.attr,
614 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
615 NULL
616 };
617
618 static const struct attribute_group sis5595_group_temp1 = {
619 .attrs = sis5595_attributes_temp1,
620 };
621
622 /* Called when we have found a new SIS5595. */
sis5595_init_device(struct sis5595_data * data)623 static void sis5595_init_device(struct sis5595_data *data)
624 {
625 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
626 if (!(config & 0x01))
627 sis5595_write_value(data, SIS5595_REG_CONFIG,
628 (config & 0xf7) | 0x01);
629 }
630
631 /* This is called when the module is loaded */
sis5595_probe(struct platform_device * pdev)632 static int sis5595_probe(struct platform_device *pdev)
633 {
634 int err = 0;
635 int i;
636 struct sis5595_data *data;
637 struct resource *res;
638 char val;
639
640 /* Reserve the ISA region */
641 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
642 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
643 DRIVER_NAME))
644 return -EBUSY;
645
646 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
647 GFP_KERNEL);
648 if (!data)
649 return -ENOMEM;
650
651 mutex_init(&data->lock);
652 mutex_init(&data->update_lock);
653 data->addr = res->start;
654 data->name = DRIVER_NAME;
655 platform_set_drvdata(pdev, data);
656
657 /*
658 * Check revision and pin registers to determine whether 4 or 5 voltages
659 */
660 data->revision = s_bridge->revision;
661 /* 4 voltages, 1 temp */
662 data->maxins = 3;
663 if (data->revision >= REV2MIN) {
664 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
665 if (!(val & 0x80))
666 /* 5 voltages, no temps */
667 data->maxins = 4;
668 }
669
670 /* Initialize the SIS5595 chip */
671 sis5595_init_device(data);
672
673 /* A few vars need to be filled upon startup */
674 for (i = 0; i < 2; i++) {
675 data->fan_min[i] = sis5595_read_value(data,
676 SIS5595_REG_FAN_MIN(i));
677 }
678
679 /* Register sysfs hooks */
680 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
681 if (err)
682 return err;
683 if (data->maxins == 4) {
684 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
685 if (err)
686 goto exit_remove_files;
687 } else {
688 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
689 if (err)
690 goto exit_remove_files;
691 }
692
693 data->hwmon_dev = hwmon_device_register(&pdev->dev);
694 if (IS_ERR(data->hwmon_dev)) {
695 err = PTR_ERR(data->hwmon_dev);
696 goto exit_remove_files;
697 }
698
699 return 0;
700
701 exit_remove_files:
702 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
703 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
704 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
705 return err;
706 }
707
sis5595_remove(struct platform_device * pdev)708 static void sis5595_remove(struct platform_device *pdev)
709 {
710 struct sis5595_data *data = platform_get_drvdata(pdev);
711
712 hwmon_device_unregister(data->hwmon_dev);
713 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
714 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
715 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
716 }
717
718 static const struct pci_device_id sis5595_pci_ids[] = {
719 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
720 { 0, }
721 };
722
723 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
724
725 static int blacklist[] = {
726 PCI_DEVICE_ID_SI_540,
727 PCI_DEVICE_ID_SI_550,
728 PCI_DEVICE_ID_SI_630,
729 PCI_DEVICE_ID_SI_645,
730 PCI_DEVICE_ID_SI_730,
731 PCI_DEVICE_ID_SI_735,
732 PCI_DEVICE_ID_SI_5511, /*
733 * 5513 chip has the 0008 device but
734 * that ID shows up in other chips so we
735 * use the 5511 ID for recognition
736 */
737 PCI_DEVICE_ID_SI_5597,
738 PCI_DEVICE_ID_SI_5598,
739 0 };
740
sis5595_device_add(unsigned short address)741 static int sis5595_device_add(unsigned short address)
742 {
743 struct resource res = {
744 .start = address,
745 .end = address + SIS5595_EXTENT - 1,
746 .name = DRIVER_NAME,
747 .flags = IORESOURCE_IO,
748 };
749 int err;
750
751 err = acpi_check_resource_conflict(&res);
752 if (err)
753 goto exit;
754
755 pdev = platform_device_alloc(DRIVER_NAME, address);
756 if (!pdev) {
757 err = -ENOMEM;
758 pr_err("Device allocation failed\n");
759 goto exit;
760 }
761
762 err = platform_device_add_resources(pdev, &res, 1);
763 if (err) {
764 pr_err("Device resource addition failed (%d)\n", err);
765 goto exit_device_put;
766 }
767
768 err = platform_device_add(pdev);
769 if (err) {
770 pr_err("Device addition failed (%d)\n", err);
771 goto exit_device_put;
772 }
773
774 return 0;
775
776 exit_device_put:
777 platform_device_put(pdev);
778 exit:
779 return err;
780 }
781
782 static struct platform_driver sis5595_driver = {
783 .driver = {
784 .name = DRIVER_NAME,
785 },
786 .probe = sis5595_probe,
787 .remove_new = sis5595_remove,
788 };
789
sis5595_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)790 static int sis5595_pci_probe(struct pci_dev *dev,
791 const struct pci_device_id *id)
792 {
793 u16 address;
794 u8 enable;
795 int *i, err;
796
797 for (i = blacklist; *i != 0; i++) {
798 struct pci_dev *d;
799 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
800 if (d) {
801 dev_err(&d->dev,
802 "Looked for SIS5595 but found unsupported device %.4x\n",
803 *i);
804 pci_dev_put(d);
805 return -ENODEV;
806 }
807 }
808
809 force_addr &= ~(SIS5595_EXTENT - 1);
810 if (force_addr) {
811 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
812 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
813 }
814
815 err = pci_read_config_word(dev, SIS5595_BASE_REG, &address);
816 if (err != PCIBIOS_SUCCESSFUL) {
817 dev_err(&dev->dev, "Failed to read ISA address\n");
818 return -ENODEV;
819 }
820
821 address &= ~(SIS5595_EXTENT - 1);
822 if (!address) {
823 dev_err(&dev->dev,
824 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
825 return -ENODEV;
826 }
827 if (force_addr && address != force_addr) {
828 /* doesn't work for some chips? */
829 dev_err(&dev->dev, "Failed to force ISA address\n");
830 return -ENODEV;
831 }
832
833 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
834 if (err != PCIBIOS_SUCCESSFUL) {
835 dev_err(&dev->dev, "Failed to read enable register\n");
836 return -ENODEV;
837 }
838 if (!(enable & 0x80)) {
839 err = pci_write_config_byte(dev, SIS5595_ENABLE_REG, enable | 0x80);
840 if (err != PCIBIOS_SUCCESSFUL)
841 goto enable_fail;
842
843 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
844 if (err != PCIBIOS_SUCCESSFUL)
845 goto enable_fail;
846
847 /* doesn't work for some chips! */
848 if (!(enable & 0x80))
849 goto enable_fail;
850 }
851
852 if (platform_driver_register(&sis5595_driver)) {
853 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
854 goto exit;
855 }
856
857 s_bridge = pci_dev_get(dev);
858 /* Sets global pdev as a side effect */
859 if (sis5595_device_add(address))
860 goto exit_unregister;
861
862 /*
863 * Always return failure here. This is to allow other drivers to bind
864 * to this pci device. We don't really want to have control over the
865 * pci device, we only wanted to read as few register values from it.
866 */
867 return -ENODEV;
868
869 enable_fail:
870 dev_err(&dev->dev, "Failed to enable HWM device\n");
871 goto exit;
872
873 exit_unregister:
874 pci_dev_put(dev);
875 platform_driver_unregister(&sis5595_driver);
876 exit:
877 return -ENODEV;
878 }
879
880 static struct pci_driver sis5595_pci_driver = {
881 .name = DRIVER_NAME,
882 .id_table = sis5595_pci_ids,
883 .probe = sis5595_pci_probe,
884 };
885
sm_sis5595_init(void)886 static int __init sm_sis5595_init(void)
887 {
888 return pci_register_driver(&sis5595_pci_driver);
889 }
890
sm_sis5595_exit(void)891 static void __exit sm_sis5595_exit(void)
892 {
893 pci_unregister_driver(&sis5595_pci_driver);
894 if (s_bridge != NULL) {
895 platform_device_unregister(pdev);
896 platform_driver_unregister(&sis5595_driver);
897 pci_dev_put(s_bridge);
898 s_bridge = NULL;
899 }
900 }
901
902 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
903 MODULE_DESCRIPTION("SiS 5595 Sensor device");
904 MODULE_LICENSE("GPL");
905
906 module_init(sm_sis5595_init);
907 module_exit(sm_sis5595_exit);
908