?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / drivers / hwmon / sis5595.c
blob47d7ce9af8fb83121fafdb3b5c3ba8a3454740a5
1 /*
2 sis5595.c - Part of lm_sensors, Linux kernel modules
3 for hardware monitoring
4
5 Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
6 Kyösti Mälkki <kmalkki@cc.hut.fi>, and
7 Mark D. Studebaker <mdsxyz123@yahoo.com>
8 Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
9 the help of Jean Delvare <khali@linux-fr.org>
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26 /*
27 SiS southbridge has a LM78-like chip integrated on the same IC.
28 This driver is a customized copy of lm78.c
29
30 Supports following revisions:
31 Version PCI ID PCI Revision
32 1 1039/0008 AF or less
33 2 1039/0008 B0 or greater
34
35 Note: these chips contain a 0008 device which is incompatible with the
36 5595. We recognize these by the presence of the listed
37 "blacklist" PCI ID and refuse to load.
38
39 NOT SUPPORTED PCI ID BLACKLIST PCI ID
40 540 0008 0540
41 550 0008 0550
42 5513 0008 5511
43 5581 0008 5597
44 5582 0008 5597
45 5597 0008 5597
46 5598 0008 5597/5598
47 630 0008 0630
48 645 0008 0645
49 730 0008 0730
50 735 0008 0735
51 */
52
53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
54
55 #include <linux/module.h>
56 #include <linux/slab.h>
57 #include <linux/ioport.h>
58 #include <linux/pci.h>
59 #include <linux/platform_device.h>
60 #include <linux/hwmon.h>
61 #include <linux/hwmon-sysfs.h>
62 #include <linux/err.h>
63 #include <linux/init.h>
64 #include <linux/jiffies.h>
65 #include <linux/mutex.h>
66 #include <linux/sysfs.h>
67 #include <linux/acpi.h>
68 #include <linux/io.h>
69
70
71 /* If force_addr is set to anything different from 0, we forcibly enable
72 the device at the given address. */
73 static u16 force_addr;
74 module_param(force_addr, ushort, 0);
75 MODULE_PARM_DESC(force_addr,
76 "Initialize the base address of the sensors");
77
78 static struct platform_device *pdev;
79
80 /* Many SIS5595 constants specified below */
81
82 /* Length of ISA address segment */
83 #define SIS5595_EXTENT 8
84 /* PCI Config Registers */
85 #define SIS5595_BASE_REG 0x68
86 #define SIS5595_PIN_REG 0x7A
87 #define SIS5595_ENABLE_REG 0x7B
88
89 /* Where are the ISA address/data registers relative to the base address */
90 #define SIS5595_ADDR_REG_OFFSET 5
91 #define SIS5595_DATA_REG_OFFSET 6
92
93 /* The SIS5595 registers */
94 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
95 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
96 #define SIS5595_REG_IN(nr) (0x20 + (nr))
97
98 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
99 #define SIS5595_REG_FAN(nr) (0x28 + (nr))
100
101 /* On the first version of the chip, the temp registers are separate.
102 On the second version,
103 TEMP pin is shared with IN4, configured in PCI register 0x7A.
104 The registers are the same as well.
105 OVER and HYST are really MAX and MIN. */
106
107 #define REV2MIN 0xb0
108 #define SIS5595_REG_TEMP (( data->revision) >= REV2MIN) ? \
109 SIS5595_REG_IN(4) : 0x27
110 #define SIS5595_REG_TEMP_OVER (( data->revision) >= REV2MIN) ? \
111 SIS5595_REG_IN_MAX(4) : 0x39
112 #define SIS5595_REG_TEMP_HYST (( data->revision) >= REV2MIN) ? \
113 SIS5595_REG_IN_MIN(4) : 0x3a
114
115 #define SIS5595_REG_CONFIG 0x40
116 #define SIS5595_REG_ALARM1 0x41
117 #define SIS5595_REG_ALARM2 0x42
118 #define SIS5595_REG_FANDIV 0x47
119
120 /* Conversions. Limit checking is only done on the TO_REG
121 variants. */
122
123 /* IN: mV, (0V to 4.08V)
124 REG: 16mV/bit */
125 static inline u8 IN_TO_REG(unsigned long val)
126 {
127 unsigned long nval = SENSORS_LIMIT(val, 0, 4080);
128 return (nval + 8) / 16;
129 }
130 #define IN_FROM_REG(val) ((val) * 16)
131
132 static inline u8 FAN_TO_REG(long rpm, int div)
133 {
134 if (rpm <= 0)
135 return 255;
136 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
137 }
138
139 static inline int FAN_FROM_REG(u8 val, int div)
140 {
141 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
142 }
143
144 /* TEMP: mC (-54.12C to +157.53C)
145 REG: 0.83C/bit + 52.12, two's complement */
146 static inline int TEMP_FROM_REG(s8 val)
147 {
148 return val * 830 + 52120;
149 }
150 static inline s8 TEMP_TO_REG(int val)
151 {
152 int nval = SENSORS_LIMIT(val, -54120, 157530) ;
153 return nval<0 ? (nval-5212-415)/830 : (nval-5212+415)/830;
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 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 /* For each registered chip, we need to keep some data in memory.
165 The structure is dynamically allocated. */
166 struct sis5595_data {
167 unsigned short addr;
168 const char *name;
169 struct device *hwmon_dev;
170 struct mutex lock;
171
172 struct mutex update_lock;
173 char valid; /* !=0 if following fields are valid */
174 unsigned long last_updated; /* In jiffies */
175 char maxins; /* == 3 if temp enabled, otherwise == 4 */
176 u8 revision; /* Reg. value */
177
178 u8 in[5]; /* Register value */
179 u8 in_max[5]; /* Register value */
180 u8 in_min[5]; /* Register value */
181 u8 fan[2]; /* Register value */
182 u8 fan_min[2]; /* Register value */
183 s8 temp; /* Register value */
184 s8 temp_over; /* Register value */
185 s8 temp_hyst; /* Register value */
186 u8 fan_div[2]; /* Register encoding, shifted right */
187 u16 alarms; /* Register encoding, combined */
188 };
189
190 static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
191
192 static int sis5595_probe(struct platform_device *pdev);
193 static int __devexit sis5595_remove(struct platform_device *pdev);
194
195 static int sis5595_read_value(struct sis5595_data *data, u8 reg);
196 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
197 static struct sis5595_data *sis5595_update_device(struct device *dev);
198 static void sis5595_init_device(struct sis5595_data *data);
199
200 static struct platform_driver sis5595_driver = {
201 .driver = {
202 .owner = THIS_MODULE,
203 .name = "sis5595",
204 },
205 .probe = sis5595_probe,
206 .remove = __devexit_p(sis5595_remove),
207 };
208
209 /* 4 Voltages */
210 static ssize_t show_in(struct device *dev, struct device_attribute *da,
211 char *buf)
212 {
213 struct sis5595_data *data = sis5595_update_device(dev);
214 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
215 int nr = attr->index;
216 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
217 }
218
219 static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
220 char *buf)
221 {
222 struct sis5595_data *data = sis5595_update_device(dev);
223 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
224 int nr = attr->index;
225 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
226 }
227
228 static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
229 char *buf)
230 {
231 struct sis5595_data *data = sis5595_update_device(dev);
232 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
233 int nr = attr->index;
234 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
235 }
236
237 static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
238 const char *buf, size_t count)
239 {
240 struct sis5595_data *data = dev_get_drvdata(dev);
241 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
242 int nr = attr->index;
243 unsigned long val = simple_strtoul(buf, NULL, 10);
244
245 mutex_lock(&data->update_lock);
246 data->in_min[nr] = IN_TO_REG(val);
247 sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
248 mutex_unlock(&data->update_lock);
249 return count;
250 }
251
252 static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
253 const char *buf, size_t count)
254 {
255 struct sis5595_data *data = dev_get_drvdata(dev);
256 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
257 int nr = attr->index;
258 unsigned long val = simple_strtoul(buf, NULL, 10);
259
260 mutex_lock(&data->update_lock);
261 data->in_max[nr] = IN_TO_REG(val);
262 sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
263 mutex_unlock(&data->update_lock);
264 return count;
265 }
266
267 #define show_in_offset(offset) \
268 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
269 show_in, NULL, offset); \
270 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
271 show_in_min, set_in_min, offset); \
272 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
273 show_in_max, set_in_max, offset);
274
275 show_in_offset(0);
276 show_in_offset(1);
277 show_in_offset(2);
278 show_in_offset(3);
279 show_in_offset(4);
280
281 /* Temperature */
282 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf)
283 {
284 struct sis5595_data *data = sis5595_update_device(dev);
285 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
286 }
287
288 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, char *buf)
289 {
290 struct sis5595_data *data = sis5595_update_device(dev);
291 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
292 }
293
294 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
295 {
296 struct sis5595_data *data = dev_get_drvdata(dev);
297 long val = simple_strtol(buf, NULL, 10);
298
299 mutex_lock(&data->update_lock);
300 data->temp_over = TEMP_TO_REG(val);
301 sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
302 mutex_unlock(&data->update_lock);
303 return count;
304 }
305
306 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
307 {
308 struct sis5595_data *data = sis5595_update_device(dev);
309 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
310 }
311
312 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
313 {
314 struct sis5595_data *data = dev_get_drvdata(dev);
315 long val = simple_strtol(buf, NULL, 10);
316
317 mutex_lock(&data->update_lock);
318 data->temp_hyst = TEMP_TO_REG(val);
319 sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
320 mutex_unlock(&data->update_lock);
321 return count;
322 }
323
324 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
325 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
326 show_temp_over, set_temp_over);
327 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
328 show_temp_hyst, set_temp_hyst);
329
330 /* 2 Fans */
331 static ssize_t show_fan(struct device *dev, struct device_attribute *da,
332 char *buf)
333 {
334 struct sis5595_data *data = sis5595_update_device(dev);
335 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
336 int nr = attr->index;
337 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
338 DIV_FROM_REG(data->fan_div[nr])) );
339 }
340
341 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
342 char *buf)
343 {
344 struct sis5595_data *data = sis5595_update_device(dev);
345 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
346 int nr = attr->index;
347 return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr],
348 DIV_FROM_REG(data->fan_div[nr])) );
349 }
350
351 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
352 const char *buf, size_t count)
353 {
354 struct sis5595_data *data = dev_get_drvdata(dev);
355 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
356 int nr = attr->index;
357 unsigned long val = simple_strtoul(buf, NULL, 10);
358
359 mutex_lock(&data->update_lock);
360 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
361 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
362 mutex_unlock(&data->update_lock);
363 return count;
364 }
365
366 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
367 char *buf)
368 {
369 struct sis5595_data *data = sis5595_update_device(dev);
370 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
371 int nr = attr->index;
372 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
373 }
374
375 /* Note: we save and restore the fan minimum here, because its value is
376 determined in part by the fan divisor. This follows the principle of
377 least surprise; the user doesn't expect the fan minimum to change just
378 because the divisor changed. */
379 static ssize_t set_fan_div(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 min;
386 unsigned long val = simple_strtoul(buf, NULL, 10);
387 int reg;
388
389 mutex_lock(&data->update_lock);
390 min = FAN_FROM_REG(data->fan_min[nr],
391 DIV_FROM_REG(data->fan_div[nr]));
392 reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
393
394 switch (val) {
395 case 1: data->fan_div[nr] = 0; break;
396 case 2: data->fan_div[nr] = 1; break;
397 case 4: data->fan_div[nr] = 2; break;
398 case 8: data->fan_div[nr] = 3; break;
399 default:
400 dev_err(dev, "fan_div value %ld not "
401 "supported. Choose one of 1, 2, 4 or 8!\n", val);
402 mutex_unlock(&data->update_lock);
403 return -EINVAL;
404 }
405
406 switch (nr) {
407 case 0:
408 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
409 break;
410 case 1:
411 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
412 break;
413 }
414 sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
415 data->fan_min[nr] =
416 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
417 sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
418 mutex_unlock(&data->update_lock);
419 return count;
420 }
421
422 #define show_fan_offset(offset) \
423 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
424 show_fan, NULL, offset - 1); \
425 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
426 show_fan_min, set_fan_min, offset - 1); \
427 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
428 show_fan_div, set_fan_div, offset - 1);
429
430 show_fan_offset(1);
431 show_fan_offset(2);
432
433 /* Alarms */
434 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
435 {
436 struct sis5595_data *data = sis5595_update_device(dev);
437 return sprintf(buf, "%d\n", data->alarms);
438 }
439 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
440
441 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
442 char *buf)
443 {
444 struct sis5595_data *data = sis5595_update_device(dev);
445 int nr = to_sensor_dev_attr(da)->index;
446 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
447 }
448 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
449 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
450 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
451 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
452 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
453 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
454 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
455 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
456
457 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
458 char *buf)
459 {
460 struct sis5595_data *data = dev_get_drvdata(dev);
461 return sprintf(buf, "%s\n", data->name);
462 }
463 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
464
465 static struct attribute *sis5595_attributes[] = {
466 &sensor_dev_attr_in0_input.dev_attr.attr,
467 &sensor_dev_attr_in0_min.dev_attr.attr,
468 &sensor_dev_attr_in0_max.dev_attr.attr,
469 &sensor_dev_attr_in0_alarm.dev_attr.attr,
470 &sensor_dev_attr_in1_input.dev_attr.attr,
471 &sensor_dev_attr_in1_min.dev_attr.attr,
472 &sensor_dev_attr_in1_max.dev_attr.attr,
473 &sensor_dev_attr_in1_alarm.dev_attr.attr,
474 &sensor_dev_attr_in2_input.dev_attr.attr,
475 &sensor_dev_attr_in2_min.dev_attr.attr,
476 &sensor_dev_attr_in2_max.dev_attr.attr,
477 &sensor_dev_attr_in2_alarm.dev_attr.attr,
478 &sensor_dev_attr_in3_input.dev_attr.attr,
479 &sensor_dev_attr_in3_min.dev_attr.attr,
480 &sensor_dev_attr_in3_max.dev_attr.attr,
481 &sensor_dev_attr_in3_alarm.dev_attr.attr,
482
483 &sensor_dev_attr_fan1_input.dev_attr.attr,
484 &sensor_dev_attr_fan1_min.dev_attr.attr,
485 &sensor_dev_attr_fan1_div.dev_attr.attr,
486 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
487 &sensor_dev_attr_fan2_input.dev_attr.attr,
488 &sensor_dev_attr_fan2_min.dev_attr.attr,
489 &sensor_dev_attr_fan2_div.dev_attr.attr,
490 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
491
492 &dev_attr_alarms.attr,
493 &dev_attr_name.attr,
494 NULL
495 };
496
497 static const struct attribute_group sis5595_group = {
498 .attrs = sis5595_attributes,
499 };
500
501 static struct attribute *sis5595_attributes_in4[] = {
502 &sensor_dev_attr_in4_input.dev_attr.attr,
503 &sensor_dev_attr_in4_min.dev_attr.attr,
504 &sensor_dev_attr_in4_max.dev_attr.attr,
505 &sensor_dev_attr_in4_alarm.dev_attr.attr,
506 NULL
507 };
508
509 static const struct attribute_group sis5595_group_in4 = {
510 .attrs = sis5595_attributes_in4,
511 };
512
513 static struct attribute *sis5595_attributes_temp1[] = {
514 &dev_attr_temp1_input.attr,
515 &dev_attr_temp1_max.attr,
516 &dev_attr_temp1_max_hyst.attr,
517 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
518 NULL
519 };
520
521 static const struct attribute_group sis5595_group_temp1 = {
522 .attrs = sis5595_attributes_temp1,
523 };
524
525 /* This is called when the module is loaded */
526 static int __devinit sis5595_probe(struct platform_device *pdev)
527 {
528 int err = 0;
529 int i;
530 struct sis5595_data *data;
531 struct resource *res;
532 char val;
533
534 /* Reserve the ISA region */
535 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
536 if (!request_region(res->start, SIS5595_EXTENT,
537 sis5595_driver.driver.name)) {
538 err = -EBUSY;
539 goto exit;
540 }
541
542 if (!(data = kzalloc(sizeof(struct sis5595_data), GFP_KERNEL))) {
543 err = -ENOMEM;
544 goto exit_release;
545 }
546
547 mutex_init(&data->lock);
548 mutex_init(&data->update_lock);
549 data->addr = res->start;
550 data->name = "sis5595";
551 platform_set_drvdata(pdev, data);
552
553 /* Check revision and pin registers to determine whether 4 or 5 voltages */
554 data->revision = s_bridge->revision;
555 /* 4 voltages, 1 temp */
556 data->maxins = 3;
557 if (data->revision >= REV2MIN) {
558 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
559 if (!(val & 0x80))
560 /* 5 voltages, no temps */
561 data->maxins = 4;
562 }
563
564 /* Initialize the SIS5595 chip */
565 sis5595_init_device(data);
566
567 /* A few vars need to be filled upon startup */
568 for (i = 0; i < 2; i++) {
569 data->fan_min[i] = sis5595_read_value(data,
570 SIS5595_REG_FAN_MIN(i));
571 }
572
573 /* Register sysfs hooks */
574 if ((err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group)))
575 goto exit_free;
576 if (data->maxins == 4) {
577 if ((err = sysfs_create_group(&pdev->dev.kobj,
578 &sis5595_group_in4)))
579 goto exit_remove_files;
580 } else {
581 if ((err = sysfs_create_group(&pdev->dev.kobj,
582 &sis5595_group_temp1)))
583 goto exit_remove_files;
584 }
585
586 data->hwmon_dev = hwmon_device_register(&pdev->dev);
587 if (IS_ERR(data->hwmon_dev)) {
588 err = PTR_ERR(data->hwmon_dev);
589 goto exit_remove_files;
590 }
591
592 return 0;
593
594 exit_remove_files:
595 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
596 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
597 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
598 exit_free:
599 kfree(data);
600 exit_release:
601 release_region(res->start, SIS5595_EXTENT);
602 exit:
603 return err;
604 }
605
606 static int __devexit sis5595_remove(struct platform_device *pdev)
607 {
608 struct sis5595_data *data = platform_get_drvdata(pdev);
609
610 hwmon_device_unregister(data->hwmon_dev);
611 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
612 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
613 sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
614
615 release_region(data->addr, SIS5595_EXTENT);
616 platform_set_drvdata(pdev, NULL);
617 kfree(data);
618
619 return 0;
620 }
621
622
623 /* ISA access must be locked explicitly. */
624 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
625 {
626 int res;
627
628 mutex_lock(&data->lock);
629 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
630 res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
631 mutex_unlock(&data->lock);
632 return res;
633 }
634
635 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
636 {
637 mutex_lock(&data->lock);
638 outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
639 outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
640 mutex_unlock(&data->lock);
641 }
642
643 /* Called when we have found a new SIS5595. */
644 static void __devinit sis5595_init_device(struct sis5595_data *data)
645 {
646 u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
647 if (!(config & 0x01))
648 sis5595_write_value(data, SIS5595_REG_CONFIG,
649 (config & 0xf7) | 0x01);
650 }
651
652 static struct sis5595_data *sis5595_update_device(struct device *dev)
653 {
654 struct sis5595_data *data = dev_get_drvdata(dev);
655 int i;
656
657 mutex_lock(&data->update_lock);
658
659 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
660 || !data->valid) {
661
662 for (i = 0; i <= data->maxins; i++) {
663 data->in[i] =
664 sis5595_read_value(data, SIS5595_REG_IN(i));
665 data->in_min[i] =
666 sis5595_read_value(data,
667 SIS5595_REG_IN_MIN(i));
668 data->in_max[i] =
669 sis5595_read_value(data,
670 SIS5595_REG_IN_MAX(i));
671 }
672 for (i = 0; i < 2; i++) {
673 data->fan[i] =
674 sis5595_read_value(data, SIS5595_REG_FAN(i));
675 data->fan_min[i] =
676 sis5595_read_value(data,
677 SIS5595_REG_FAN_MIN(i));
678 }
679 if (data->maxins == 3) {
680 data->temp =
681 sis5595_read_value(data, SIS5595_REG_TEMP);
682 data->temp_over =
683 sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
684 data->temp_hyst =
685 sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
686 }
687 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
688 data->fan_div[0] = (i >> 4) & 0x03;
689 data->fan_div[1] = i >> 6;
690 data->alarms =
691 sis5595_read_value(data, SIS5595_REG_ALARM1) |
692 (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
693 data->last_updated = jiffies;
694 data->valid = 1;
695 }
696
697 mutex_unlock(&data->update_lock);
698
699 return data;
700 }
701
702 static const struct pci_device_id sis5595_pci_ids[] = {
703 { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
704 { 0, }
705 };
706
707 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
708
709 static int blacklist[] __devinitdata = {
710 PCI_DEVICE_ID_SI_540,
711 PCI_DEVICE_ID_SI_550,
712 PCI_DEVICE_ID_SI_630,
713 PCI_DEVICE_ID_SI_645,
714 PCI_DEVICE_ID_SI_730,
715 PCI_DEVICE_ID_SI_735,
716 PCI_DEVICE_ID_SI_5511, /* 5513 chip has the 0008 device but
717 that ID shows up in other chips so we
718 use the 5511 ID for recognition */
719 PCI_DEVICE_ID_SI_5597,
720 PCI_DEVICE_ID_SI_5598,
721 0 };
722
723 static int __devinit sis5595_device_add(unsigned short address)
724 {
725 struct resource res = {
726 .start = address,
727 .end = address + SIS5595_EXTENT - 1,
728 .name = "sis5595",
729 .flags = IORESOURCE_IO,
730 };
731 int err;
732
733 err = acpi_check_resource_conflict(&res);
734 if (err)
735 goto exit;
736
737 pdev = platform_device_alloc("sis5595", address);
738 if (!pdev) {
739 err = -ENOMEM;
740 pr_err("Device allocation failed\n");
741 goto exit;
742 }
743
744 err = platform_device_add_resources(pdev, &res, 1);
745 if (err) {
746 pr_err("Device resource addition failed (%d)\n", err);
747 goto exit_device_put;
748 }
749
750 err = platform_device_add(pdev);
751 if (err) {
752 pr_err("Device addition failed (%d)\n", err);
753 goto exit_device_put;
754 }
755
756 return 0;
757
758 exit_device_put:
759 platform_device_put(pdev);
760 exit:
761 return err;
762 }
763
764 static int __devinit sis5595_pci_probe(struct pci_dev *dev,
765 const struct pci_device_id *id)
766 {
767 u16 address;
768 u8 enable;
769 int *i;
770
771 for (i = blacklist; *i != 0; i++) {
772 struct pci_dev *d;
773 if ((d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL))) {
774 dev_err(&d->dev, "Looked for SIS5595 but found unsupported device %.4x\n", *i);
775 pci_dev_put(d);
776 return -ENODEV;
777 }
778 }
779
780 force_addr &= ~(SIS5595_EXTENT - 1);
781 if (force_addr) {
782 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
783 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
784 }
785
786 if (PCIBIOS_SUCCESSFUL !=
787 pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
788 dev_err(&dev->dev, "Failed to read ISA address\n");
789 return -ENODEV;
790 }
791
792 address &= ~(SIS5595_EXTENT - 1);
793 if (!address) {
794 dev_err(&dev->dev, "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
795 return -ENODEV;
796 }
797 if (force_addr && address != force_addr) {
798 /* doesn't work for some chips? */
799 dev_err(&dev->dev, "Failed to force ISA address\n");
800 return -ENODEV;
801 }
802
803 if (PCIBIOS_SUCCESSFUL !=
804 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
805 dev_err(&dev->dev, "Failed to read enable register\n");
806 return -ENODEV;
807 }
808 if (!(enable & 0x80)) {
809 if ((PCIBIOS_SUCCESSFUL !=
810 pci_write_config_byte(dev, SIS5595_ENABLE_REG,
811 enable | 0x80))
812 || (PCIBIOS_SUCCESSFUL !=
813 pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
814 || (!(enable & 0x80))) {
815 /* doesn't work for some chips! */
816 dev_err(&dev->dev, "Failed to enable HWM device\n");
817 return -ENODEV;
818 }
819 }
820
821 if (platform_driver_register(&sis5595_driver)) {
822 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
823 goto exit;
824 }
825
826 s_bridge = pci_dev_get(dev);
827 /* Sets global pdev as a side effect */
828 if (sis5595_device_add(address))
829 goto exit_unregister;
830
831 /* Always return failure here. This is to allow other drivers to bind
832 * to this pci device. We don't really want to have control over the
833 * pci device, we only wanted to read as few register values from it.
834 */
835 return -ENODEV;
836
837 exit_unregister:
838 pci_dev_put(dev);
839 platform_driver_unregister(&sis5595_driver);
840 exit:
841 return -ENODEV;
842 }
843
844 static struct pci_driver sis5595_pci_driver = {
845 .name = "sis5595",
846 .id_table = sis5595_pci_ids,
847 .probe = sis5595_pci_probe,
848 };
849
850 static int __init sm_sis5595_init(void)
851 {
852 return pci_register_driver(&sis5595_pci_driver);
853 }
854
855 static void __exit sm_sis5595_exit(void)
856 {
857 pci_unregister_driver(&sis5595_pci_driver);
858 if (s_bridge != NULL) {
859 platform_device_unregister(pdev);
860 platform_driver_unregister(&sis5595_driver);
861 pci_dev_put(s_bridge);
862 s_bridge = NULL;
863 }
864 }
865
866 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
867 MODULE_DESCRIPTION("SiS 5595 Sensor device");
868 MODULE_LICENSE("GPL");
869
870 module_init(sm_sis5595_init);
871 module_exit(sm_sis5595_exit);
Mirror of the linux-mips.org kernel tree