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 (defaults to 2)
157 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
158 */
DIV_TO_REG(int val)159 static inline u8 DIV_TO_REG(int val)
160 {
161 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
162 }
163 #define DIV_FROM_REG(val) (1 << (val))
164
165 /*
166 * For each registered chip, we need to keep some data in memory.
167 * The structure is dynamically allocated.
168 */
169 struct sis5595_data {
170 unsigned short addr;
171 const char *name;
172 struct device *hwmon_dev;
173 struct mutex lock;
174
175 struct mutex update_lock;
176 bool valid; /* true if following fields are valid */
177 unsigned long last_updated; /* In jiffies */
178 char maxins; /* == 3 if temp enabled, otherwise == 4 */
179 u8 revision; /* Reg. value */
180
181 u8 in[5]; /* Register value */
182 u8 in_max[5]; /* Register value */
183 u8 in_min[5]; /* Register value */
184 u8 fan[2]; /* Register value */
185 u8 fan_min[2]; /* Register value */
186 s8 temp; /* Register value */
187 s8 temp_over; /* Register value */
188 s8 temp_hyst; /* Register value */
189 u8 fan_div[2]; /* Register encoding, shifted right */
190 u16 alarms; /* Register encoding, combined */
191 };
192
193 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
194
195 /* ISA access must be locked explicitly. */
sis5595_read_value(struct sis5595_data * data,u8 reg)196 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
197 {
198 int res;
199
200 mutex_lock(&data->lock);
201 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
202 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
203 mutex_unlock(&data->lock);
204 return res;
205 }
206
sis5595_write_value(struct sis5595_data * data,u8 reg,u8 value)207 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
208 {
209 mutex_lock(&data->lock);
210 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
211 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
212 mutex_unlock(&data->lock);
213 }
214
sis5595_update_device(struct device * dev)215 static struct sis5595_data *sis5595_update_device(struct device *dev)
216 {
217 struct sis5595_data *data = dev_get_drvdata(dev);
218 int i;
219
220 mutex_lock(&data->update_lock);
221
222 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
223 || !data->valid) {
224
225 for (i = 0; i <= data->maxins; i++) {
226 data->in[i] =
227 sis5595_read_value(data, SIS5595_REG_IN(i));
228 data->in_min[i] =
229 sis5595_read_value(data,
230 SIS5595_REG_IN_MIN(i));
231 data->in_max[i] =
232 sis5595_read_value(data,
233 SIS5595_REG_IN_MAX(i));
234 }
235 for (i = 0; i < 2; i++) {
236 data->fan[i] =
237 sis5595_read_value(data, SIS5595_REG_FAN(i));
238 data->fan_min[i] =
239 sis5595_read_value(data,
240 SIS5595_REG_FAN_MIN(i));
241 }
242 if (data->maxins == 3) {
243 data->temp =
244 sis5595_read_value(data, SIS5595_REG_TEMP);
245 data->temp_over =
246 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
247 data->temp_hyst =
248 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
249 }
250 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
251 data->fan_div[0] = (i >> 4) & 0x03;
252 data->fan_div[1] = i >> 6;
253 data->alarms =
254 sis5595_read_value(data, SIS5595_REG_ALARM1) |
255 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
256 data->last_updated = jiffies;
257 data->valid = true;
258 }
259
260 mutex_unlock(&data->update_lock);
261
262 return data;
263 }
264
265 /* 4 Voltages */
in_show(struct device * dev,struct device_attribute * da,char * buf)266 static ssize_t in_show(struct device *dev, struct device_attribute *da,
267 char *buf)
268 {
269 struct sis5595_data *data = sis5595_update_device(dev);
270 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
271 int nr = attr->index;
272 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
273 }
274
in_min_show(struct device * dev,struct device_attribute * da,char * buf)275 static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
276 char *buf)
277 {
278 struct sis5595_data *data = sis5595_update_device(dev);
279 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
280 int nr = attr->index;
281 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
282 }
283
in_max_show(struct device * dev,struct device_attribute * da,char * buf)284 static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
285 char *buf)
286 {
287 struct sis5595_data *data = sis5595_update_device(dev);
288 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
289 int nr = attr->index;
290 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
291 }
292
in_min_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)293 static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
294 const char *buf, size_t count)
295 {
296 struct sis5595_data *data = dev_get_drvdata(dev);
297 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
298 int nr = attr->index;
299 unsigned long val;
300 int err;
301
302 err = kstrtoul(buf, 10, &val);
303 if (err)
304 return err;
305
306 mutex_lock(&data->update_lock);
307 data->in_min[nr] = IN_TO_REG(val);
308 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
309 mutex_unlock(&data->update_lock);
310 return count;
311 }
312
in_max_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)313 static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
314 const char *buf, size_t count)
315 {
316 struct sis5595_data *data = dev_get_drvdata(dev);
317 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
318 int nr = attr->index;
319 unsigned long val;
320 int err;
321
322 err = kstrtoul(buf, 10, &val);
323 if (err)
324 return err;
325
326 mutex_lock(&data->update_lock);
327 data->in_max[nr] = IN_TO_REG(val);
328 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
329 mutex_unlock(&data->update_lock);
330 return count;
331 }
332
333 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
334 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
335 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
336 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
337 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
338 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
339 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
340 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
341 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
342 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
343 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
344 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
345 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
346 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
347 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
348
349 /* Temperature */
temp1_input_show(struct device * dev,struct device_attribute * attr,char * buf)350 static ssize_t temp1_input_show(struct device *dev,
351 struct device_attribute *attr, char *buf)
352 {
353 struct sis5595_data *data = sis5595_update_device(dev);
354 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
355 }
356
temp1_max_show(struct device * dev,struct device_attribute * attr,char * buf)357 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
358 char *buf)
359 {
360 struct sis5595_data *data = sis5595_update_device(dev);
361 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
362 }
363
temp1_max_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)364 static ssize_t temp1_max_store(struct device *dev,
365 struct device_attribute *attr, const char *buf,
366 size_t count)
367 {
368 struct sis5595_data *data = dev_get_drvdata(dev);
369 long val;
370 int err;
371
372 err = kstrtol(buf, 10, &val);
373 if (err)
374 return err;
375
376 mutex_lock(&data->update_lock);
377 data->temp_over = TEMP_TO_REG(val);
378 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
379 mutex_unlock(&data->update_lock);
380 return count;
381 }
382
temp1_max_hyst_show(struct device * dev,struct device_attribute * attr,char * buf)383 static ssize_t temp1_max_hyst_show(struct device *dev,
384 struct device_attribute *attr, char *buf)
385 {
386 struct sis5595_data *data = sis5595_update_device(dev);
387 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
388 }
389
temp1_max_hyst_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)390 static ssize_t temp1_max_hyst_store(struct device *dev,
391 struct device_attribute *attr,
392 const char *buf, size_t count)
393 {
394 struct sis5595_data *data = dev_get_drvdata(dev);
395 long val;
396 int err;
397
398 err = kstrtol(buf, 10, &val);
399 if (err)
400 return err;
401
402 mutex_lock(&data->update_lock);
403 data->temp_hyst = TEMP_TO_REG(val);
404 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
405 mutex_unlock(&data->update_lock);
406 return count;
407 }
408
409 static DEVICE_ATTR_RO(temp1_input);
410 static DEVICE_ATTR_RW(temp1_max);
411 static DEVICE_ATTR_RW(temp1_max_hyst);
412
413 /* 2 Fans */
fan_show(struct device * dev,struct device_attribute * da,char * buf)414 static ssize_t fan_show(struct device *dev, struct device_attribute *da,
415 char *buf)
416 {
417 struct sis5595_data *data = sis5595_update_device(dev);
418 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
419 int nr = attr->index;
420 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
421 DIV_FROM_REG(data->fan_div[nr])));
422 }
423
fan_min_show(struct device * dev,struct device_attribute * da,char * buf)424 static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
425 char *buf)
426 {
427 struct sis5595_data *data = sis5595_update_device(dev);
428 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
429 int nr = attr->index;
430 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
431 DIV_FROM_REG(data->fan_div[nr])));
432 }
433
fan_min_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)434 static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,
435 const char *buf, size_t count)
436 {
437 struct sis5595_data *data = dev_get_drvdata(dev);
438 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
439 int nr = attr->index;
440 unsigned long val;
441 int err;
442
443 err = kstrtoul(buf, 10, &val);
444 if (err)
445 return err;
446
447 mutex_lock(&data->update_lock);
448 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
449 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
450 mutex_unlock(&data->update_lock);
451 return count;
452 }
453
fan_div_show(struct device * dev,struct device_attribute * da,char * buf)454 static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
455 char *buf)
456 {
457 struct sis5595_data *data = sis5595_update_device(dev);
458 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
459 int nr = attr->index;
460 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
461 }
462
463 /*
464 * Note: we save and restore the fan minimum here, because its value is
465 * determined in part by the fan divisor. This follows the principle of
466 * least surprise; the user doesn't expect the fan minimum to change just
467 * because the divisor changed.
468 */
fan_div_store(struct device * dev,struct device_attribute * da,const char * buf,size_t count)469 static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,
470 const char *buf, size_t count)
471 {
472 struct sis5595_data *data = dev_get_drvdata(dev);
473 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
474 int nr = attr->index;
475 unsigned long min;
476 int reg;
477 unsigned long val;
478 int err;
479
480 err = kstrtoul(buf, 10, &val);
481 if (err)
482 return err;
483
484 mutex_lock(&data->update_lock);
485 min = FAN_FROM_REG(data->fan_min[nr],
486 DIV_FROM_REG(data->fan_div[nr]));
487 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
488
489 switch (val) {
490 case 1:
491 data->fan_div[nr] = 0;
492 break;
493 case 2:
494 data->fan_div[nr] = 1;
495 break;
496 case 4:
497 data->fan_div[nr] = 2;
498 break;
499 case 8:
500 data->fan_div[nr] = 3;
501 break;
502 default:
503 dev_err(dev,
504 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
505 val);
506 mutex_unlock(&data->update_lock);
507 return -EINVAL;
508 }
509
510 switch (nr) {
511 case 0:
512 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
513 break;
514 case 1:
515 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
516 break;
517 }
518 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
519 data->fan_min[nr] =
520 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
521 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
522 mutex_unlock(&data->update_lock);
523 return count;
524 }
525
526 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
527 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
528 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
529 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
530 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
531 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
532
533 /* Alarms */
alarms_show(struct device * dev,struct device_attribute * attr,char * buf)534 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
535 char *buf)
536 {
537 struct sis5595_data *data = sis5595_update_device(dev);
538 return sprintf(buf, "%d\n", data->alarms);
539 }
540 static DEVICE_ATTR_RO(alarms);
541
alarm_show(struct device * dev,struct device_attribute * da,char * buf)542 static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
543 char *buf)
544 {
545 struct sis5595_data *data = sis5595_update_device(dev);
546 int nr = to_sensor_dev_attr(da)->index;
547 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
548 }
549 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
550 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
551 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
552 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
553 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
554 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
555 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
556 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
557
name_show(struct device * dev,struct device_attribute * attr,char * buf)558 static ssize_t name_show(struct device *dev, struct device_attribute *attr,
559 char *buf)
560 {
561 struct sis5595_data *data = dev_get_drvdata(dev);
562 return sprintf(buf, "%s\n", data->name);
563 }
564 static DEVICE_ATTR_RO(name);
565
566 static struct attribute *sis5595_attributes[] = {
567 &sensor_dev_attr_in0_input.dev_attr.attr,
568 &sensor_dev_attr_in0_min.dev_attr.attr,
569 &sensor_dev_attr_in0_max.dev_attr.attr,
570 &sensor_dev_attr_in0_alarm.dev_attr.attr,
571 &sensor_dev_attr_in1_input.dev_attr.attr,
572 &sensor_dev_attr_in1_min.dev_attr.attr,
573 &sensor_dev_attr_in1_max.dev_attr.attr,
574 &sensor_dev_attr_in1_alarm.dev_attr.attr,
575 &sensor_dev_attr_in2_input.dev_attr.attr,
576 &sensor_dev_attr_in2_min.dev_attr.attr,
577 &sensor_dev_attr_in2_max.dev_attr.attr,
578 &sensor_dev_attr_in2_alarm.dev_attr.attr,
579 &sensor_dev_attr_in3_input.dev_attr.attr,
580 &sensor_dev_attr_in3_min.dev_attr.attr,
581 &sensor_dev_attr_in3_max.dev_attr.attr,
582 &sensor_dev_attr_in3_alarm.dev_attr.attr,
583
584 &sensor_dev_attr_fan1_input.dev_attr.attr,
585 &sensor_dev_attr_fan1_min.dev_attr.attr,
586 &sensor_dev_attr_fan1_div.dev_attr.attr,
587 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
588 &sensor_dev_attr_fan2_input.dev_attr.attr,
589 &sensor_dev_attr_fan2_min.dev_attr.attr,
590 &sensor_dev_attr_fan2_div.dev_attr.attr,
591 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
592
593 &dev_attr_alarms.attr,
594 &dev_attr_name.attr,
595 NULL
596 };
597
598 static const struct attribute_group sis5595_group = {
599 .attrs = sis5595_attributes,
600 };
601
602 static struct attribute *sis5595_attributes_in4[] = {
603 &sensor_dev_attr_in4_input.dev_attr.attr,
604 &sensor_dev_attr_in4_min.dev_attr.attr,
605 &sensor_dev_attr_in4_max.dev_attr.attr,
606 &sensor_dev_attr_in4_alarm.dev_attr.attr,
607 NULL
608 };
609
610 static const struct attribute_group sis5595_group_in4 = {
611 .attrs = sis5595_attributes_in4,
612 };
613
614 static struct attribute *sis5595_attributes_temp1[] = {
615 &dev_attr_temp1_input.attr,
616 &dev_attr_temp1_max.attr,
617 &dev_attr_temp1_max_hyst.attr,
618 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
619 NULL
620 };
621
622 static const struct attribute_group sis5595_group_temp1 = {
623 .attrs = sis5595_attributes_temp1,
624 };
625
626 /* Called when we have found a new SIS5595. */
sis5595_init_device(struct sis5595_data * data)627 static void sis5595_init_device(struct sis5595_data *data)
628 {
629 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
630 if (!(config & 0x01))
631 sis5595_write_value(data, SIS5595_REG_CONFIG,
632 (config & 0xf7) | 0x01);
633 }
634
635 /* This is called when the module is loaded */
sis5595_probe(struct platform_device * pdev)636 static int sis5595_probe(struct platform_device *pdev)
637 {
638 int err = 0;
639 int i;
640 struct sis5595_data *data;
641 struct resource *res;
642 char val;
643
644 /* Reserve the ISA region */
645 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
646 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
647 DRIVER_NAME))
648 return -EBUSY;
649
650 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
651 GFP_KERNEL);
652 if (!data)
653 return -ENOMEM;
654
655 mutex_init(&data->lock);
656 mutex_init(&data->update_lock);
657 data->addr = res->start;
658 data->name = DRIVER_NAME;
659 platform_set_drvdata(pdev, data);
660
661 /*
662 * Check revision and pin registers to determine whether 4 or 5 voltages
663 */
664 data->revision = s_bridge->revision;
665 /* 4 voltages, 1 temp */
666 data->maxins = 3;
667 if (data->revision >= REV2MIN) {
668 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
669 if (!(val & 0x80))
670 /* 5 voltages, no temps */
671 data->maxins = 4;
672 }
673
674 /* Initialize the SIS5595 chip */
675 sis5595_init_device(data);
676
677 /* A few vars need to be filled upon startup */
678 for (i = 0; i < 2; i++) {
679 data->fan_min[i] = sis5595_read_value(data,
680 SIS5595_REG_FAN_MIN(i));
681 }
682
683 /* Register sysfs hooks */
684 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
685 if (err)
686 return err;
687 if (data->maxins == 4) {
688 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
689 if (err)
690 goto exit_remove_files;
691 } else {
692 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
693 if (err)
694 goto exit_remove_files;
695 }
696
697 data->hwmon_dev = hwmon_device_register(&pdev->dev);
698 if (IS_ERR(data->hwmon_dev)) {
699 err = PTR_ERR(data->hwmon_dev);
700 goto exit_remove_files;
701 }
702
703 return 0;
704
705 exit_remove_files:
706 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
707 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
708 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
709 return err;
710 }
711
sis5595_remove(struct platform_device * pdev)712 static int sis5595_remove(struct platform_device *pdev)
713 {
714 struct sis5595_data *data = platform_get_drvdata(pdev);
715
716 hwmon_device_unregister(data->hwmon_dev);
717 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
718 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
719 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
720
721 return 0;
722 }
723
724 static const struct pci_device_id sis5595_pci_ids[] = {
725 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
726 { 0, }
727 };
728
729 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
730
731 static int blacklist[] = {
732 PCI_DEVICE_ID_SI_540,
733 PCI_DEVICE_ID_SI_550,
734 PCI_DEVICE_ID_SI_630,
735 PCI_DEVICE_ID_SI_645,
736 PCI_DEVICE_ID_SI_730,
737 PCI_DEVICE_ID_SI_735,
738 PCI_DEVICE_ID_SI_5511, /*
739 * 5513 chip has the 0008 device but
740 * that ID shows up in other chips so we
741 * use the 5511 ID for recognition
742 */
743 PCI_DEVICE_ID_SI_5597,
744 PCI_DEVICE_ID_SI_5598,
745 0 };
746
sis5595_device_add(unsigned short address)747 static int sis5595_device_add(unsigned short address)
748 {
749 struct resource res = {
750 .start = address,
751 .end = address + SIS5595_EXTENT - 1,
752 .name = DRIVER_NAME,
753 .flags = IORESOURCE_IO,
754 };
755 int err;
756
757 err = acpi_check_resource_conflict(&res);
758 if (err)
759 goto exit;
760
761 pdev = platform_device_alloc(DRIVER_NAME, address);
762 if (!pdev) {
763 err = -ENOMEM;
764 pr_err("Device allocation failed\n");
765 goto exit;
766 }
767
768 err = platform_device_add_resources(pdev, &res, 1);
769 if (err) {
770 pr_err("Device resource addition failed (%d)\n", err);
771 goto exit_device_put;
772 }
773
774 err = platform_device_add(pdev);
775 if (err) {
776 pr_err("Device addition failed (%d)\n", err);
777 goto exit_device_put;
778 }
779
780 return 0;
781
782 exit_device_put:
783 platform_device_put(pdev);
784 exit:
785 return err;
786 }
787
788 static struct platform_driver sis5595_driver = {
789 .driver = {
790 .name = DRIVER_NAME,
791 },
792 .probe = sis5595_probe,
793 .remove = sis5595_remove,
794 };
795
sis5595_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)796 static int sis5595_pci_probe(struct pci_dev *dev,
797 const struct pci_device_id *id)
798 {
799 u16 address;
800 u8 enable;
801 int *i, err;
802
803 for (i = blacklist; *i != 0; i++) {
804 struct pci_dev *d;
805 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
806 if (d) {
807 dev_err(&d->dev,
808 "Looked for SIS5595 but found unsupported device %.4x\n",
809 *i);
810 pci_dev_put(d);
811 return -ENODEV;
812 }
813 }
814
815 force_addr &= ~(SIS5595_EXTENT - 1);
816 if (force_addr) {
817 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
818 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
819 }
820
821 err = pci_read_config_word(dev, SIS5595_BASE_REG, &address);
822 if (err != PCIBIOS_SUCCESSFUL) {
823 dev_err(&dev->dev, "Failed to read ISA address\n");
824 return -ENODEV;
825 }
826
827 address &= ~(SIS5595_EXTENT - 1);
828 if (!address) {
829 dev_err(&dev->dev,
830 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
831 return -ENODEV;
832 }
833 if (force_addr && address != force_addr) {
834 /* doesn't work for some chips? */
835 dev_err(&dev->dev, "Failed to force ISA address\n");
836 return -ENODEV;
837 }
838
839 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
840 if (err != PCIBIOS_SUCCESSFUL) {
841 dev_err(&dev->dev, "Failed to read enable register\n");
842 return -ENODEV;
843 }
844 if (!(enable & 0x80)) {
845 err = pci_write_config_byte(dev, SIS5595_ENABLE_REG, enable | 0x80);
846 if (err != PCIBIOS_SUCCESSFUL)
847 goto enable_fail;
848
849 err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
850 if (err != PCIBIOS_SUCCESSFUL)
851 goto enable_fail;
852
853 /* doesn't work for some chips! */
854 if (!(enable & 0x80))
855 goto enable_fail;
856 }
857
858 if (platform_driver_register(&sis5595_driver)) {
859 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
860 goto exit;
861 }
862
863 s_bridge = pci_dev_get(dev);
864 /* Sets global pdev as a side effect */
865 if (sis5595_device_add(address))
866 goto exit_unregister;
867
868 /*
869 * Always return failure here. This is to allow other drivers to bind
870 * to this pci device. We don't really want to have control over the
871 * pci device, we only wanted to read as few register values from it.
872 */
873 return -ENODEV;
874
875 enable_fail:
876 dev_err(&dev->dev, "Failed to enable HWM device\n");
877 goto exit;
878
879 exit_unregister:
880 pci_dev_put(dev);
881 platform_driver_unregister(&sis5595_driver);
882 exit:
883 return -ENODEV;
884 }
885
886 static struct pci_driver sis5595_pci_driver = {
887 .name = DRIVER_NAME,
888 .id_table = sis5595_pci_ids,
889 .probe = sis5595_pci_probe,
890 };
891
sm_sis5595_init(void)892 static int __init sm_sis5595_init(void)
893 {
894 return pci_register_driver(&sis5595_pci_driver);
895 }
896
sm_sis5595_exit(void)897 static void __exit sm_sis5595_exit(void)
898 {
899 pci_unregister_driver(&sis5595_pci_driver);
900 if (s_bridge != NULL) {
901 platform_device_unregister(pdev);
902 platform_driver_unregister(&sis5595_driver);
903 pci_dev_put(s_bridge);
904 s_bridge = NULL;
905 }
906 }
907
908 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
909 MODULE_DESCRIPTION("SiS 5595 Sensor device");
910 MODULE_LICENSE("GPL");
911
912 module_init(sm_sis5595_init);
913 module_exit(sm_sis5595_exit);
914