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Merge tag 'regmap-fix-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / hwmon / sis5595.c
blob0c6741f949f5fd29a407fa972413f0c851634b58
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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41
42 #include <linux/module.h>
43 #include <linux/slab.h>
44 #include <linux/ioport.h>
45 #include <linux/pci.h>
46 #include <linux/platform_device.h>
47 #include <linux/hwmon.h>
48 #include <linux/hwmon-sysfs.h>
49 #include <linux/err.h>
50 #include <linux/init.h>
51 #include <linux/jiffies.h>
52 #include <linux/mutex.h>
53 #include <linux/sysfs.h>
54 #include <linux/acpi.h>
55 #include <linux/io.h>
56
57 /*
58 * If force_addr is set to anything different from 0, we forcibly enable
59 * the device at the given address.
60 */
61 static u16 force_addr;
62 module_param(force_addr, ushort, 0);
63 MODULE_PARM_DESC(force_addr,
64 "Initialize the base address of the sensors");
65
66 static struct platform_device *pdev;
67
68 /* Many SIS5595 constants specified below */
69
70 /* Length of ISA address segment */
71 #define SIS5595_EXTENT 8
72 /* PCI Config Registers */
73 #define SIS5595_BASE_REG 0x68
74 #define SIS5595_PIN_REG 0x7A
75 #define SIS5595_ENABLE_REG 0x7B
76
77 /* Where are the ISA address/data registers relative to the base address */
78 #define SIS5595_ADDR_REG_OFFSET 5
79 #define SIS5595_DATA_REG_OFFSET 6
80
81 /* The SIS5595 registers */
82 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
83 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
84 #define SIS5595_REG_IN(nr) (0x20 + (nr))
85
86 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
87 #define SIS5595_REG_FAN(nr) (0x28 + (nr))
88
89 /*
90 * On the first version of the chip, the temp registers are separate.
91 * On the second version,
92 * TEMP pin is shared with IN4, configured in PCI register 0x7A.
93 * The registers are the same as well.
94 * OVER and HYST are really MAX and MIN.
95 */
96
97 #define REV2MIN 0xb0
98 #define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
99 SIS5595_REG_IN(4) : 0x27)
100 #define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
101 SIS5595_REG_IN_MAX(4) : 0x39)
102 #define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
103 SIS5595_REG_IN_MIN(4) : 0x3a)
104
105 #define SIS5595_REG_CONFIG 0x40
106 #define SIS5595_REG_ALARM1 0x41
107 #define SIS5595_REG_ALARM2 0x42
108 #define SIS5595_REG_FANDIV 0x47
109
110 /*
111 * Conversions. Limit checking is only done on the TO_REG
112 * variants.
113 */
114
115 /*
116 * IN: mV, (0V to 4.08V)
117 * REG: 16mV/bit
118 */
119 static inline u8 IN_TO_REG(unsigned long val)
120 {
121 unsigned long nval = clamp_val(val, 0, 4080);
122 return (nval + 8) / 16;
123 }
124 #define IN_FROM_REG(val) ((val) * 16)
125
126 static inline u8 FAN_TO_REG(long rpm, int div)
127 {
128 if (rpm <= 0)
129 return 255;
130 if (rpm > 1350000)
131 return 1;
132 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
133 }
134
135 static inline int FAN_FROM_REG(u8 val, int div)
136 {
137 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
138 }
139
140 /*
141 * TEMP: mC (-54.12C to +157.53C)
142 * REG: 0.83C/bit + 52.12, two's complement
143 */
144 static inline int TEMP_FROM_REG(s8 val)
145 {
146 return val * 830 + 52120;
147 }
148 static inline s8 TEMP_TO_REG(long val)
149 {
150 int nval = clamp_val(val, -54120, 157530) ;
151 return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
152 }
153
154 /*
155 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
156 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
157 */
158 static inline u8 DIV_TO_REG(int val)
159 {
160 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
161 }
162 #define DIV_FROM_REG(val) (1 << (val))
163
164 /*
165 * For each registered chip, we need to keep some data in memory.
166 * The structure is dynamically allocated.
167 */
168 struct sis5595_data {
169 unsigned short addr;
170 const char *name;
171 struct device *hwmon_dev;
172 struct mutex lock;
173
174 struct mutex update_lock;
175 char valid; /* !=0 if following fields are valid */
176 unsigned long last_updated; /* In jiffies */
177 char maxins; /* == 3 if temp enabled, otherwise == 4 */
178 u8 revision; /* Reg. value */
179
180 u8 in[5]; /* Register value */
181 u8 in_max[5]; /* Register value */
182 u8 in_min[5]; /* Register value */
183 u8 fan[2]; /* Register value */
184 u8 fan_min[2]; /* Register value */
185 s8 temp; /* Register value */
186 s8 temp_over; /* Register value */
187 s8 temp_hyst; /* Register value */
188 u8 fan_div[2]; /* Register encoding, shifted right */
189 u16 alarms; /* Register encoding, combined */
190 };
191
192 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
193
194 static int sis5595_probe(struct platform_device *pdev);
195 static int sis5595_remove(struct platform_device *pdev);
196
197 static int sis5595_read_value(struct sis5595_data *data, u8 reg);
198 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
199 static struct sis5595_data *sis5595_update_device(struct device *dev);
200 static void sis5595_init_device(struct sis5595_data *data);
201
202 static struct platform_driver sis5595_driver = {
203 .driver = {
204 .name = "sis5595",
205 },
206 .probe = sis5595_probe,
207 .remove = sis5595_remove,
208 };
209
210 /* 4 Voltages */
211 static ssize_t in_show(struct device *dev, struct device_attribute *da,
212 char *buf)
213 {
214 struct sis5595_data *data = sis5595_update_device(dev);
215 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
216 int nr = attr->index;
217 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
218 }
219
220 static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
221 char *buf)
222 {
223 struct sis5595_data *data = sis5595_update_device(dev);
224 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
225 int nr = attr->index;
226 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
227 }
228
229 static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
230 char *buf)
231 {
232 struct sis5595_data *data = sis5595_update_device(dev);
233 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
234 int nr = attr->index;
235 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
236 }
237
238 static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
239 const char *buf, size_t count)
240 {
241 struct sis5595_data *data = dev_get_drvdata(dev);
242 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
243 int nr = attr->index;
244 unsigned long val;
245 int err;
246
247 err = kstrtoul(buf, 10, &val);
248 if (err)
249 return err;
250
251 mutex_lock(&data->update_lock);
252 data->in_min[nr] = IN_TO_REG(val);
253 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
254 mutex_unlock(&data->update_lock);
255 return count;
256 }
257
258 static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
259 const char *buf, size_t count)
260 {
261 struct sis5595_data *data = dev_get_drvdata(dev);
262 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
263 int nr = attr->index;
264 unsigned long val;
265 int err;
266
267 err = kstrtoul(buf, 10, &val);
268 if (err)
269 return err;
270
271 mutex_lock(&data->update_lock);
272 data->in_max[nr] = IN_TO_REG(val);
273 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
274 mutex_unlock(&data->update_lock);
275 return count;
276 }
277
278 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
279 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
280 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
281 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
282 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
283 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
284 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
285 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
286 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
287 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
288 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
289 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
290 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
291 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
292 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
293
294 /* Temperature */
295 static ssize_t temp1_input_show(struct device *dev,
296 struct device_attribute *attr, char *buf)
297 {
298 struct sis5595_data *data = sis5595_update_device(dev);
299 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
300 }
301
302 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
303 char *buf)
304 {
305 struct sis5595_data *data = sis5595_update_device(dev);
306 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
307 }
308
309 static ssize_t temp1_max_store(struct device *dev,
310 struct device_attribute *attr, const char *buf,
311 size_t count)
312 {
313 struct sis5595_data *data = dev_get_drvdata(dev);
314 long val;
315 int err;
316
317 err = kstrtol(buf, 10, &val);
318 if (err)
319 return err;
320
321 mutex_lock(&data->update_lock);
322 data->temp_over = TEMP_TO_REG(val);
323 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
324 mutex_unlock(&data->update_lock);
325 return count;
326 }
327
328 static ssize_t temp1_max_hyst_show(struct device *dev,
329 struct device_attribute *attr, char *buf)
330 {
331 struct sis5595_data *data = sis5595_update_device(dev);
332 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
333 }
334
335 static ssize_t temp1_max_hyst_store(struct device *dev,
336 struct device_attribute *attr,
337 const char *buf, size_t count)
338 {
339 struct sis5595_data *data = dev_get_drvdata(dev);
340 long val;
341 int err;
342
343 err = kstrtol(buf, 10, &val);
344 if (err)
345 return err;
346
347 mutex_lock(&data->update_lock);
348 data->temp_hyst = TEMP_TO_REG(val);
349 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
350 mutex_unlock(&data->update_lock);
351 return count;
352 }
353
354 static DEVICE_ATTR_RO(temp1_input);
355 static DEVICE_ATTR_RW(temp1_max);
356 static DEVICE_ATTR_RW(temp1_max_hyst);
357
358 /* 2 Fans */
359 static ssize_t fan_show(struct device *dev, struct device_attribute *da,
360 char *buf)
361 {
362 struct sis5595_data *data = sis5595_update_device(dev);
363 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
364 int nr = attr->index;
365 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
366 DIV_FROM_REG(data->fan_div[nr])));
367 }
368
369 static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
370 char *buf)
371 {
372 struct sis5595_data *data = sis5595_update_device(dev);
373 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
374 int nr = attr->index;
375 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
376 DIV_FROM_REG(data->fan_div[nr])));
377 }
378
379 static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,
380 const char *buf, size_t count)
381 {
382 struct sis5595_data *data = dev_get_drvdata(dev);
383 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
384 int nr = attr->index;
385 unsigned long val;
386 int err;
387
388 err = kstrtoul(buf, 10, &val);
389 if (err)
390 return err;
391
392 mutex_lock(&data->update_lock);
393 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
394 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
395 mutex_unlock(&data->update_lock);
396 return count;
397 }
398
399 static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
400 char *buf)
401 {
402 struct sis5595_data *data = sis5595_update_device(dev);
403 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
404 int nr = attr->index;
405 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
406 }
407
408 /*
409 * Note: we save and restore the fan minimum here, because its value is
410 * determined in part by the fan divisor. This follows the principle of
411 * least surprise; the user doesn't expect the fan minimum to change just
412 * because the divisor changed.
413 */
414 static ssize_t fan_div_store(struct device *dev, struct device_attribute *da,
415 const char *buf, size_t count)
416 {
417 struct sis5595_data *data = dev_get_drvdata(dev);
418 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
419 int nr = attr->index;
420 unsigned long min;
421 int reg;
422 unsigned long val;
423 int err;
424
425 err = kstrtoul(buf, 10, &val);
426 if (err)
427 return err;
428
429 mutex_lock(&data->update_lock);
430 min = FAN_FROM_REG(data->fan_min[nr],
431 DIV_FROM_REG(data->fan_div[nr]));
432 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
433
434 switch (val) {
435 case 1:
436 data->fan_div[nr] = 0;
437 break;
438 case 2:
439 data->fan_div[nr] = 1;
440 break;
441 case 4:
442 data->fan_div[nr] = 2;
443 break;
444 case 8:
445 data->fan_div[nr] = 3;
446 break;
447 default:
448 dev_err(dev,
449 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
450 val);
451 mutex_unlock(&data->update_lock);
452 return -EINVAL;
453 }
454
455 switch (nr) {
456 case 0:
457 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
458 break;
459 case 1:
460 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
461 break;
462 }
463 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
464 data->fan_min[nr] =
465 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
466 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
467 mutex_unlock(&data->update_lock);
468 return count;
469 }
470
471 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
472 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
473 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
474 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
475 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
476 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
477
478 /* Alarms */
479 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
480 char *buf)
481 {
482 struct sis5595_data *data = sis5595_update_device(dev);
483 return sprintf(buf, "%d\n", data->alarms);
484 }
485 static DEVICE_ATTR_RO(alarms);
486
487 static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
488 char *buf)
489 {
490 struct sis5595_data *data = sis5595_update_device(dev);
491 int nr = to_sensor_dev_attr(da)->index;
492 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
493 }
494 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
495 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
496 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
497 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
498 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
499 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
500 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
501 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
502
503 static ssize_t name_show(struct device *dev, struct device_attribute *attr,
504 char *buf)
505 {
506 struct sis5595_data *data = dev_get_drvdata(dev);
507 return sprintf(buf, "%s\n", data->name);
508 }
509 static DEVICE_ATTR_RO(name);
510
511 static struct attribute *sis5595_attributes[] = {
512 &sensor_dev_attr_in0_input.dev_attr.attr,
513 &sensor_dev_attr_in0_min.dev_attr.attr,
514 &sensor_dev_attr_in0_max.dev_attr.attr,
515 &sensor_dev_attr_in0_alarm.dev_attr.attr,
516 &sensor_dev_attr_in1_input.dev_attr.attr,
517 &sensor_dev_attr_in1_min.dev_attr.attr,
518 &sensor_dev_attr_in1_max.dev_attr.attr,
519 &sensor_dev_attr_in1_alarm.dev_attr.attr,
520 &sensor_dev_attr_in2_input.dev_attr.attr,
521 &sensor_dev_attr_in2_min.dev_attr.attr,
522 &sensor_dev_attr_in2_max.dev_attr.attr,
523 &sensor_dev_attr_in2_alarm.dev_attr.attr,
524 &sensor_dev_attr_in3_input.dev_attr.attr,
525 &sensor_dev_attr_in3_min.dev_attr.attr,
526 &sensor_dev_attr_in3_max.dev_attr.attr,
527 &sensor_dev_attr_in3_alarm.dev_attr.attr,
528
529 &sensor_dev_attr_fan1_input.dev_attr.attr,
530 &sensor_dev_attr_fan1_min.dev_attr.attr,
531 &sensor_dev_attr_fan1_div.dev_attr.attr,
532 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
533 &sensor_dev_attr_fan2_input.dev_attr.attr,
534 &sensor_dev_attr_fan2_min.dev_attr.attr,
535 &sensor_dev_attr_fan2_div.dev_attr.attr,
536 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
537
538 &dev_attr_alarms.attr,
539 &dev_attr_name.attr,
540 NULL
541 };
542
543 static const struct attribute_group sis5595_group = {
544 .attrs = sis5595_attributes,
545 };
546
547 static struct attribute *sis5595_attributes_in4[] = {
548 &sensor_dev_attr_in4_input.dev_attr.attr,
549 &sensor_dev_attr_in4_min.dev_attr.attr,
550 &sensor_dev_attr_in4_max.dev_attr.attr,
551 &sensor_dev_attr_in4_alarm.dev_attr.attr,
552 NULL
553 };
554
555 static const struct attribute_group sis5595_group_in4 = {
556 .attrs = sis5595_attributes_in4,
557 };
558
559 static struct attribute *sis5595_attributes_temp1[] = {
560 &dev_attr_temp1_input.attr,
561 &dev_attr_temp1_max.attr,
562 &dev_attr_temp1_max_hyst.attr,
563 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
564 NULL
565 };
566
567 static const struct attribute_group sis5595_group_temp1 = {
568 .attrs = sis5595_attributes_temp1,
569 };
570
571 /* This is called when the module is loaded */
572 static int sis5595_probe(struct platform_device *pdev)
573 {
574 int err = 0;
575 int i;
576 struct sis5595_data *data;
577 struct resource *res;
578 char val;
579
580 /* Reserve the ISA region */
581 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
582 if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
583 sis5595_driver.driver.name))
584 return -EBUSY;
585
586 data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
587 GFP_KERNEL);
588 if (!data)
589 return -ENOMEM;
590
591 mutex_init(&data->lock);
592 mutex_init(&data->update_lock);
593 data->addr = res->start;
594 data->name = "sis5595";
595 platform_set_drvdata(pdev, data);
596
597 /*
598 * Check revision and pin registers to determine whether 4 or 5 voltages
599 */
600 data->revision = s_bridge->revision;
601 /* 4 voltages, 1 temp */
602 data->maxins = 3;
603 if (data->revision >= REV2MIN) {
604 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
605 if (!(val & 0x80))
606 /* 5 voltages, no temps */
607 data->maxins = 4;
608 }
609
610 /* Initialize the SIS5595 chip */
611 sis5595_init_device(data);
612
613 /* A few vars need to be filled upon startup */
614 for (i = 0; i < 2; i++) {
615 data->fan_min[i] = sis5595_read_value(data,
616 SIS5595_REG_FAN_MIN(i));
617 }
618
619 /* Register sysfs hooks */
620 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
621 if (err)
622 return err;
623 if (data->maxins == 4) {
624 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
625 if (err)
626 goto exit_remove_files;
627 } else {
628 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
629 if (err)
630 goto exit_remove_files;
631 }
632
633 data->hwmon_dev = hwmon_device_register(&pdev->dev);
634 if (IS_ERR(data->hwmon_dev)) {
635 err = PTR_ERR(data->hwmon_dev);
636 goto exit_remove_files;
637 }
638
639 return 0;
640
641 exit_remove_files:
642 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
643 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
644 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
645 return err;
646 }
647
648 static int sis5595_remove(struct platform_device *pdev)
649 {
650 struct sis5595_data *data = platform_get_drvdata(pdev);
651
652 hwmon_device_unregister(data->hwmon_dev);
653 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
654 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
655 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
656
657 return 0;
658 }
659
660 /* ISA access must be locked explicitly. */
661 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
662 {
663 int res;
664
665 mutex_lock(&data->lock);
666 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
667 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
668 mutex_unlock(&data->lock);
669 return res;
670 }
671
672 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
673 {
674 mutex_lock(&data->lock);
675 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
676 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
677 mutex_unlock(&data->lock);
678 }
679
680 /* Called when we have found a new SIS5595. */
681 static void sis5595_init_device(struct sis5595_data *data)
682 {
683 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
684 if (!(config & 0x01))
685 sis5595_write_value(data, SIS5595_REG_CONFIG,
686 (config & 0xf7) | 0x01);
687 }
688
689 static struct sis5595_data *sis5595_update_device(struct device *dev)
690 {
691 struct sis5595_data *data = dev_get_drvdata(dev);
692 int i;
693
694 mutex_lock(&data->update_lock);
695
696 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
697 || !data->valid) {
698
699 for (i = 0; i <= data->maxins; i++) {
700 data->in[i] =
701 sis5595_read_value(data, SIS5595_REG_IN(i));
702 data->in_min[i] =
703 sis5595_read_value(data,
704 SIS5595_REG_IN_MIN(i));
705 data->in_max[i] =
706 sis5595_read_value(data,
707 SIS5595_REG_IN_MAX(i));
708 }
709 for (i = 0; i < 2; i++) {
710 data->fan[i] =
711 sis5595_read_value(data, SIS5595_REG_FAN(i));
712 data->fan_min[i] =
713 sis5595_read_value(data,
714 SIS5595_REG_FAN_MIN(i));
715 }
716 if (data->maxins == 3) {
717 data->temp =
718 sis5595_read_value(data, SIS5595_REG_TEMP);
719 data->temp_over =
720 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
721 data->temp_hyst =
722 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
723 }
724 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
725 data->fan_div[0] = (i >> 4) & 0x03;
726 data->fan_div[1] = i >> 6;
727 data->alarms =
728 sis5595_read_value(data, SIS5595_REG_ALARM1) |
729 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
730 data->last_updated = jiffies;
731 data->valid = 1;
732 }
733
734 mutex_unlock(&data->update_lock);
735
736 return data;
737 }
738
739 static const struct pci_device_id sis5595_pci_ids[] = {
740 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
741 { 0, }
742 };
743
744 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
745
746 static int blacklist[] = {
747 PCI_DEVICE_ID_SI_540,
748 PCI_DEVICE_ID_SI_550,
749 PCI_DEVICE_ID_SI_630,
750 PCI_DEVICE_ID_SI_645,
751 PCI_DEVICE_ID_SI_730,
752 PCI_DEVICE_ID_SI_735,
753 PCI_DEVICE_ID_SI_5511, /*
754 * 5513 chip has the 0008 device but
755 * that ID shows up in other chips so we
756 * use the 5511 ID for recognition
757 */
758 PCI_DEVICE_ID_SI_5597,
759 PCI_DEVICE_ID_SI_5598,
760 0 };
761
762 static int sis5595_device_add(unsigned short address)
763 {
764 struct resource res = {
765 .start = address,
766 .end = address + SIS5595_EXTENT - 1,
767 .name = "sis5595",
768 .flags = IORESOURCE_IO,
769 };
770 int err;
771
772 err = acpi_check_resource_conflict(&res);
773 if (err)
774 goto exit;
775
776 pdev = platform_device_alloc("sis5595", address);
777 if (!pdev) {
778 err = -ENOMEM;
779 pr_err("Device allocation failed\n");
780 goto exit;
781 }
782
783 err = platform_device_add_resources(pdev, &res, 1);
784 if (err) {
785 pr_err("Device resource addition failed (%d)\n", err);
786 goto exit_device_put;
787 }
788
789 err = platform_device_add(pdev);
790 if (err) {
791 pr_err("Device addition failed (%d)\n", err);
792 goto exit_device_put;
793 }
794
795 return 0;
796
797 exit_device_put:
798 platform_device_put(pdev);
799 exit:
800 return err;
801 }
802
803 static int sis5595_pci_probe(struct pci_dev *dev,
804 const struct pci_device_id *id)
805 {
806 u16 address;
807 u8 enable;
808 int *i;
809
810 for (i = blacklist; *i != 0; i++) {
811 struct pci_dev *d;
812 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
813 if (d) {
814 dev_err(&d->dev,
815 "Looked for SIS5595 but found unsupported device %.4x\n",
816 *i);
817 pci_dev_put(d);
818 return -ENODEV;
819 }
820 }
821
822 force_addr &= ~(SIS5595_EXTENT - 1);
823 if (force_addr) {
824 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
825 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
826 }
827
828 if (PCIBIOS_SUCCESSFUL !=
829 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
830 dev_err(&dev->dev, "Failed to read ISA address\n");
831 return -ENODEV;
832 }
833
834 address &= ~(SIS5595_EXTENT - 1);
835 if (!address) {
836 dev_err(&dev->dev,
837 "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
838 return -ENODEV;
839 }
840 if (force_addr && address != force_addr) {
841 /* doesn't work for some chips? */
842 dev_err(&dev->dev, "Failed to force ISA address\n");
843 return -ENODEV;
844 }
845
846 if (PCIBIOS_SUCCESSFUL !=
847 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
848 dev_err(&dev->dev, "Failed to read enable register\n");
849 return -ENODEV;
850 }
851 if (!(enable & 0x80)) {
852 if ((PCIBIOS_SUCCESSFUL !=
853 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
854 enable | 0x80))
855 || (PCIBIOS_SUCCESSFUL !=
856 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
857 || (!(enable & 0x80))) {
858 /* doesn't work for some chips! */
859 dev_err(&dev->dev, "Failed to enable HWM device\n");
860 return -ENODEV;
861 }
862 }
863
864 if (platform_driver_register(&sis5595_driver)) {
865 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
866 goto exit;
867 }
868
869 s_bridge = pci_dev_get(dev);
870 /* Sets global pdev as a side effect */
871 if (sis5595_device_add(address))
872 goto exit_unregister;
873
874 /*
875 * Always return failure here. This is to allow other drivers to bind
876 * to this pci device. We don't really want to have control over the
877 * pci device, we only wanted to read as few register values from it.
878 */
879 return -ENODEV;
880
881 exit_unregister:
882 pci_dev_put(dev);
883 platform_driver_unregister(&sis5595_driver);
884 exit:
885 return -ENODEV;
886 }
887
888 static struct pci_driver sis5595_pci_driver = {
889 .name = "sis5595",
890 .id_table = sis5595_pci_ids,
891 .probe = sis5595_pci_probe,
892 };
893
894 static int __init sm_sis5595_init(void)
895 {
896 return pci_register_driver(&sis5595_pci_driver);
897 }
898
899 static void __exit sm_sis5595_exit(void)
900 {
901 pci_unregister_driver(&sis5595_pci_driver);
902 if (s_bridge != NULL) {
903 platform_device_unregister(pdev);
904 platform_driver_unregister(&sis5595_driver);
905 pci_dev_put(s_bridge);
906 s_bridge = NULL;
907 }
908 }
909
910 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
911 MODULE_DESCRIPTION("SiS 5595 Sensor device");
912 MODULE_LICENSE("GPL");
913
914 module_init(sm_sis5595_init);
915 module_exit(sm_sis5595_exit);
Linux with added FPC-III support