Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/hwmon/sis5595.c

  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 <jdelvare@suse.de>
 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 /*
 72  * If force_addr is set to anything different from 0, we forcibly enable
 73  * the device at the given address.
 74  */
 75 static u16 force_addr;
 76 module_param(force_addr, ushort, 0);
 77 MODULE_PARM_DESC(force_addr,
 78                  "Initialize the base address of the sensors");
 79 
 80 static struct platform_device *pdev;
 81 
 82 /* Many SIS5595 constants specified below */
 83 
 84 /* Length of ISA address segment */
 85 #define SIS5595_EXTENT 8
 86 /* PCI Config Registers */
 87 #define SIS5595_BASE_REG 0x68
 88 #define SIS5595_PIN_REG 0x7A
 89 #define SIS5595_ENABLE_REG 0x7B
 90 
 91 /* Where are the ISA address/data registers relative to the base address */
 92 #define SIS5595_ADDR_REG_OFFSET 5
 93 #define SIS5595_DATA_REG_OFFSET 6
 94 
 95 /* The SIS5595 registers */
 96 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
 97 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
 98 #define SIS5595_REG_IN(nr) (0x20 + (nr))
 99 
100 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
101 #define SIS5595_REG_FAN(nr) (0x28 + (nr))
102 
103 /*
104  * On the first version of the chip, the temp registers are separate.
105  * On the second version,
106  * TEMP pin is shared with IN4, configured in PCI register 0x7A.
107  * The registers are the same as well.
108  * OVER and HYST are really MAX and MIN.
109  */
110 
111 #define REV2MIN 0xb0
112 #define SIS5595_REG_TEMP        (((data->revision) >= REV2MIN) ? \
113                                         SIS5595_REG_IN(4) : 0x27)
114 #define SIS5595_REG_TEMP_OVER   (((data->revision) >= REV2MIN) ? \
115                                         SIS5595_REG_IN_MAX(4) : 0x39)
116 #define SIS5595_REG_TEMP_HYST   (((data->revision) >= REV2MIN) ? \
117                                         SIS5595_REG_IN_MIN(4) : 0x3a)
118 
119 #define SIS5595_REG_CONFIG 0x40
120 #define SIS5595_REG_ALARM1 0x41
121 #define SIS5595_REG_ALARM2 0x42
122 #define SIS5595_REG_FANDIV 0x47
123 
124 /*
125  * Conversions. Limit checking is only done on the TO_REG
126  * variants.
127  */
128 
129 /*
130  * IN: mV, (0V to 4.08V)
131  * REG: 16mV/bit
132  */
133 static inline u8 IN_TO_REG(unsigned long val)
134 {
135         unsigned long nval = clamp_val(val, 0, 4080);
136         return (nval + 8) / 16;
137 }
138 #define IN_FROM_REG(val) ((val) *  16)
139 
140 static inline u8 FAN_TO_REG(long rpm, int div)
141 {
142         if (rpm <= 0)
143                 return 255;
144         if (rpm > 1350000)
145                 return 1;
146         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
147 }
148 
149 static inline int FAN_FROM_REG(u8 val, int div)
150 {
151         return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
152 }
153 
154 /*
155  * TEMP: mC (-54.12C to +157.53C)
156  * REG: 0.83C/bit + 52.12, two's complement
157  */
158 static inline int TEMP_FROM_REG(s8 val)
159 {
160         return val * 830 + 52120;
161 }
162 static inline s8 TEMP_TO_REG(long val)
163 {
164         int nval = clamp_val(val, -54120, 157530) ;
165         return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
166 }
167 
168 /*
169  * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
170  * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
171  */
172 static inline u8 DIV_TO_REG(int val)
173 {
174         return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
175 }
176 #define DIV_FROM_REG(val) (1 << (val))
177 
178 /*
179  * For each registered chip, we need to keep some data in memory.
180  * The structure is dynamically allocated.
181  */
182 struct sis5595_data {
183         unsigned short addr;
184         const char *name;
185         struct device *hwmon_dev;
186         struct mutex lock;
187 
188         struct mutex update_lock;
189         char valid;             /* !=0 if following fields are valid */
190         unsigned long last_updated;     /* In jiffies */
191         char maxins;            /* == 3 if temp enabled, otherwise == 4 */
192         u8 revision;            /* Reg. value */
193 
194         u8 in[5];               /* Register value */
195         u8 in_max[5];           /* Register value */
196         u8 in_min[5];           /* Register value */
197         u8 fan[2];              /* Register value */
198         u8 fan_min[2];          /* Register value */
199         s8 temp;                /* Register value */
200         s8 temp_over;           /* Register value */
201         s8 temp_hyst;           /* Register value */
202         u8 fan_div[2];          /* Register encoding, shifted right */
203         u16 alarms;             /* Register encoding, combined */
204 };
205 
206 static struct pci_dev *s_bridge;        /* pointer to the (only) sis5595 */
207 
208 static int sis5595_probe(struct platform_device *pdev);
209 static int sis5595_remove(struct platform_device *pdev);
210 
211 static int sis5595_read_value(struct sis5595_data *data, u8 reg);
212 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
213 static struct sis5595_data *sis5595_update_device(struct device *dev);
214 static void sis5595_init_device(struct sis5595_data *data);
215 
216 static struct platform_driver sis5595_driver = {
217         .driver = {
218                 .owner  = THIS_MODULE,
219                 .name   = "sis5595",
220         },
221         .probe          = sis5595_probe,
222         .remove         = sis5595_remove,
223 };
224 
225 /* 4 Voltages */
226 static ssize_t show_in(struct device *dev, struct device_attribute *da,
227                        char *buf)
228 {
229         struct sis5595_data *data = sis5595_update_device(dev);
230         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
231         int nr = attr->index;
232         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
233 }
234 
235 static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
236                            char *buf)
237 {
238         struct sis5595_data *data = sis5595_update_device(dev);
239         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
240         int nr = attr->index;
241         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
242 }
243 
244 static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
245                            char *buf)
246 {
247         struct sis5595_data *data = sis5595_update_device(dev);
248         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
249         int nr = attr->index;
250         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
251 }
252 
253 static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
254                           const char *buf, size_t count)
255 {
256         struct sis5595_data *data = dev_get_drvdata(dev);
257         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
258         int nr = attr->index;
259         unsigned long val;
260         int err;
261 
262         err = kstrtoul(buf, 10, &val);
263         if (err)
264                 return err;
265 
266         mutex_lock(&data->update_lock);
267         data->in_min[nr] = IN_TO_REG(val);
268         sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
269         mutex_unlock(&data->update_lock);
270         return count;
271 }
272 
273 static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
274                           const char *buf, size_t count)
275 {
276         struct sis5595_data *data = dev_get_drvdata(dev);
277         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
278         int nr = attr->index;
279         unsigned long val;
280         int err;
281 
282         err = kstrtoul(buf, 10, &val);
283         if (err)
284                 return err;
285 
286         mutex_lock(&data->update_lock);
287         data->in_max[nr] = IN_TO_REG(val);
288         sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
289         mutex_unlock(&data->update_lock);
290         return count;
291 }
292 
293 #define show_in_offset(offset)                                  \
294 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
295                 show_in, NULL, offset);                         \
296 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
297                 show_in_min, set_in_min, offset);               \
298 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
299                 show_in_max, set_in_max, offset);
300 
301 show_in_offset(0);
302 show_in_offset(1);
303 show_in_offset(2);
304 show_in_offset(3);
305 show_in_offset(4);
306 
307 /* Temperature */
308 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
309                          char *buf)
310 {
311         struct sis5595_data *data = sis5595_update_device(dev);
312         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
313 }
314 
315 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr,
316                               char *buf)
317 {
318         struct sis5595_data *data = sis5595_update_device(dev);
319         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
320 }
321 
322 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr,
323                              const char *buf, size_t count)
324 {
325         struct sis5595_data *data = dev_get_drvdata(dev);
326         long val;
327         int err;
328 
329         err = kstrtol(buf, 10, &val);
330         if (err)
331                 return err;
332 
333         mutex_lock(&data->update_lock);
334         data->temp_over = TEMP_TO_REG(val);
335         sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
336         mutex_unlock(&data->update_lock);
337         return count;
338 }
339 
340 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr,
341                               char *buf)
342 {
343         struct sis5595_data *data = sis5595_update_device(dev);
344         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
345 }
346 
347 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr,
348                              const char *buf, size_t count)
349 {
350         struct sis5595_data *data = dev_get_drvdata(dev);
351         long val;
352         int err;
353 
354         err = kstrtol(buf, 10, &val);
355         if (err)
356                 return err;
357 
358         mutex_lock(&data->update_lock);
359         data->temp_hyst = TEMP_TO_REG(val);
360         sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
361         mutex_unlock(&data->update_lock);
362         return count;
363 }
364 
365 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
366 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
367                 show_temp_over, set_temp_over);
368 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
369                 show_temp_hyst, set_temp_hyst);
370 
371 /* 2 Fans */
372 static ssize_t show_fan(struct device *dev, struct device_attribute *da,
373                         char *buf)
374 {
375         struct sis5595_data *data = sis5595_update_device(dev);
376         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
377         int nr = attr->index;
378         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
379                 DIV_FROM_REG(data->fan_div[nr])));
380 }
381 
382 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
383                             char *buf)
384 {
385         struct sis5595_data *data = sis5595_update_device(dev);
386         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
387         int nr = attr->index;
388         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
389                 DIV_FROM_REG(data->fan_div[nr])));
390 }
391 
392 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
393                            const char *buf, size_t count)
394 {
395         struct sis5595_data *data = dev_get_drvdata(dev);
396         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
397         int nr = attr->index;
398         unsigned long val;
399         int err;
400 
401         err = kstrtoul(buf, 10, &val);
402         if (err)
403                 return err;
404 
405         mutex_lock(&data->update_lock);
406         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
407         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
408         mutex_unlock(&data->update_lock);
409         return count;
410 }
411 
412 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
413                             char *buf)
414 {
415         struct sis5595_data *data = sis5595_update_device(dev);
416         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
417         int nr = attr->index;
418         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
419 }
420 
421 /*
422  * Note: we save and restore the fan minimum here, because its value is
423  * determined in part by the fan divisor.  This follows the principle of
424  * least surprise; the user doesn't expect the fan minimum to change just
425  * because the divisor changed.
426  */
427 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
428                            const char *buf, size_t count)
429 {
430         struct sis5595_data *data = dev_get_drvdata(dev);
431         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
432         int nr = attr->index;
433         unsigned long min;
434         int reg;
435         unsigned long val;
436         int err;
437 
438         err = kstrtoul(buf, 10, &val);
439         if (err)
440                 return err;
441 
442         mutex_lock(&data->update_lock);
443         min = FAN_FROM_REG(data->fan_min[nr],
444                         DIV_FROM_REG(data->fan_div[nr]));
445         reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
446 
447         switch (val) {
448         case 1:
449                 data->fan_div[nr] = 0;
450                 break;
451         case 2:
452                 data->fan_div[nr] = 1;
453                 break;
454         case 4:
455                 data->fan_div[nr] = 2;
456                 break;
457         case 8:
458                 data->fan_div[nr] = 3;
459                 break;
460         default:
461                 dev_err(dev,
462                         "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
463                         val);
464                 mutex_unlock(&data->update_lock);
465                 return -EINVAL;
466         }
467 
468         switch (nr) {
469         case 0:
470                 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
471                 break;
472         case 1:
473                 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
474                 break;
475         }
476         sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
477         data->fan_min[nr] =
478                 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
479         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
480         mutex_unlock(&data->update_lock);
481         return count;
482 }
483 
484 #define show_fan_offset(offset)                                         \
485 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \
486                 show_fan, NULL, offset - 1);                            \
487 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \
488                 show_fan_min, set_fan_min, offset - 1);                 \
489 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,         \
490                 show_fan_div, set_fan_div, offset - 1);
491 
492 show_fan_offset(1);
493 show_fan_offset(2);
494 
495 /* Alarms */
496 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
497                            char *buf)
498 {
499         struct sis5595_data *data = sis5595_update_device(dev);
500         return sprintf(buf, "%d\n", data->alarms);
501 }
502 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
503 
504 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
505                           char *buf)
506 {
507         struct sis5595_data *data = sis5595_update_device(dev);
508         int nr = to_sensor_dev_attr(da)->index;
509         return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
510 }
511 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
512 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
513 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
514 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
515 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
516 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
517 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
518 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
519 
520 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
521                          char *buf)
522 {
523         struct sis5595_data *data = dev_get_drvdata(dev);
524         return sprintf(buf, "%s\n", data->name);
525 }
526 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
527 
528 static struct attribute *sis5595_attributes[] = {
529         &sensor_dev_attr_in0_input.dev_attr.attr,
530         &sensor_dev_attr_in0_min.dev_attr.attr,
531         &sensor_dev_attr_in0_max.dev_attr.attr,
532         &sensor_dev_attr_in0_alarm.dev_attr.attr,
533         &sensor_dev_attr_in1_input.dev_attr.attr,
534         &sensor_dev_attr_in1_min.dev_attr.attr,
535         &sensor_dev_attr_in1_max.dev_attr.attr,
536         &sensor_dev_attr_in1_alarm.dev_attr.attr,
537         &sensor_dev_attr_in2_input.dev_attr.attr,
538         &sensor_dev_attr_in2_min.dev_attr.attr,
539         &sensor_dev_attr_in2_max.dev_attr.attr,
540         &sensor_dev_attr_in2_alarm.dev_attr.attr,
541         &sensor_dev_attr_in3_input.dev_attr.attr,
542         &sensor_dev_attr_in3_min.dev_attr.attr,
543         &sensor_dev_attr_in3_max.dev_attr.attr,
544         &sensor_dev_attr_in3_alarm.dev_attr.attr,
545 
546         &sensor_dev_attr_fan1_input.dev_attr.attr,
547         &sensor_dev_attr_fan1_min.dev_attr.attr,
548         &sensor_dev_attr_fan1_div.dev_attr.attr,
549         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
550         &sensor_dev_attr_fan2_input.dev_attr.attr,
551         &sensor_dev_attr_fan2_min.dev_attr.attr,
552         &sensor_dev_attr_fan2_div.dev_attr.attr,
553         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
554 
555         &dev_attr_alarms.attr,
556         &dev_attr_name.attr,
557         NULL
558 };
559 
560 static const struct attribute_group sis5595_group = {
561         .attrs = sis5595_attributes,
562 };
563 
564 static struct attribute *sis5595_attributes_in4[] = {
565         &sensor_dev_attr_in4_input.dev_attr.attr,
566         &sensor_dev_attr_in4_min.dev_attr.attr,
567         &sensor_dev_attr_in4_max.dev_attr.attr,
568         &sensor_dev_attr_in4_alarm.dev_attr.attr,
569         NULL
570 };
571 
572 static const struct attribute_group sis5595_group_in4 = {
573         .attrs = sis5595_attributes_in4,
574 };
575 
576 static struct attribute *sis5595_attributes_temp1[] = {
577         &dev_attr_temp1_input.attr,
578         &dev_attr_temp1_max.attr,
579         &dev_attr_temp1_max_hyst.attr,
580         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
581         NULL
582 };
583 
584 static const struct attribute_group sis5595_group_temp1 = {
585         .attrs = sis5595_attributes_temp1,
586 };
587 
588 /* This is called when the module is loaded */
589 static int sis5595_probe(struct platform_device *pdev)
590 {
591         int err = 0;
592         int i;
593         struct sis5595_data *data;
594         struct resource *res;
595         char val;
596 
597         /* Reserve the ISA region */
598         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
599         if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
600                                  sis5595_driver.driver.name))
601                 return -EBUSY;
602 
603         data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
604                             GFP_KERNEL);
605         if (!data)
606                 return -ENOMEM;
607 
608         mutex_init(&data->lock);
609         mutex_init(&data->update_lock);
610         data->addr = res->start;
611         data->name = "sis5595";
612         platform_set_drvdata(pdev, data);
613 
614         /*
615          * Check revision and pin registers to determine whether 4 or 5 voltages
616          */
617         data->revision = s_bridge->revision;
618         /* 4 voltages, 1 temp */
619         data->maxins = 3;
620         if (data->revision >= REV2MIN) {
621                 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
622                 if (!(val & 0x80))
623                         /* 5 voltages, no temps */
624                         data->maxins = 4;
625         }
626 
627         /* Initialize the SIS5595 chip */
628         sis5595_init_device(data);
629 
630         /* A few vars need to be filled upon startup */
631         for (i = 0; i < 2; i++) {
632                 data->fan_min[i] = sis5595_read_value(data,
633                                         SIS5595_REG_FAN_MIN(i));
634         }
635 
636         /* Register sysfs hooks */
637         err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
638         if (err)
639                 return err;
640         if (data->maxins == 4) {
641                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
642                 if (err)
643                         goto exit_remove_files;
644         } else {
645                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
646                 if (err)
647                         goto exit_remove_files;
648         }
649 
650         data->hwmon_dev = hwmon_device_register(&pdev->dev);
651         if (IS_ERR(data->hwmon_dev)) {
652                 err = PTR_ERR(data->hwmon_dev);
653                 goto exit_remove_files;
654         }
655 
656         return 0;
657 
658 exit_remove_files:
659         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
660         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
661         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
662         return err;
663 }
664 
665 static int sis5595_remove(struct platform_device *pdev)
666 {
667         struct sis5595_data *data = platform_get_drvdata(pdev);
668 
669         hwmon_device_unregister(data->hwmon_dev);
670         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
671         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
672         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
673 
674         return 0;
675 }
676 
677 
678 /* ISA access must be locked explicitly. */
679 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
680 {
681         int res;
682 
683         mutex_lock(&data->lock);
684         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
685         res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
686         mutex_unlock(&data->lock);
687         return res;
688 }
689 
690 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
691 {
692         mutex_lock(&data->lock);
693         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
694         outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
695         mutex_unlock(&data->lock);
696 }
697 
698 /* Called when we have found a new SIS5595. */
699 static void sis5595_init_device(struct sis5595_data *data)
700 {
701         u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
702         if (!(config & 0x01))
703                 sis5595_write_value(data, SIS5595_REG_CONFIG,
704                                 (config & 0xf7) | 0x01);
705 }
706 
707 static struct sis5595_data *sis5595_update_device(struct device *dev)
708 {
709         struct sis5595_data *data = dev_get_drvdata(dev);
710         int i;
711 
712         mutex_lock(&data->update_lock);
713 
714         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
715             || !data->valid) {
716 
717                 for (i = 0; i <= data->maxins; i++) {
718                         data->in[i] =
719                             sis5595_read_value(data, SIS5595_REG_IN(i));
720                         data->in_min[i] =
721                             sis5595_read_value(data,
722                                                SIS5595_REG_IN_MIN(i));
723                         data->in_max[i] =
724                             sis5595_read_value(data,
725                                                SIS5595_REG_IN_MAX(i));
726                 }
727                 for (i = 0; i < 2; i++) {
728                         data->fan[i] =
729                             sis5595_read_value(data, SIS5595_REG_FAN(i));
730                         data->fan_min[i] =
731                             sis5595_read_value(data,
732                                                SIS5595_REG_FAN_MIN(i));
733                 }
734                 if (data->maxins == 3) {
735                         data->temp =
736                             sis5595_read_value(data, SIS5595_REG_TEMP);
737                         data->temp_over =
738                             sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
739                         data->temp_hyst =
740                             sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
741                 }
742                 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
743                 data->fan_div[0] = (i >> 4) & 0x03;
744                 data->fan_div[1] = i >> 6;
745                 data->alarms =
746                     sis5595_read_value(data, SIS5595_REG_ALARM1) |
747                     (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
748                 data->last_updated = jiffies;
749                 data->valid = 1;
750         }
751 
752         mutex_unlock(&data->update_lock);
753 
754         return data;
755 }
756 
757 static const struct pci_device_id sis5595_pci_ids[] = {
758         { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
759         { 0, }
760 };
761 
762 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
763 
764 static int blacklist[] = {
765         PCI_DEVICE_ID_SI_540,
766         PCI_DEVICE_ID_SI_550,
767         PCI_DEVICE_ID_SI_630,
768         PCI_DEVICE_ID_SI_645,
769         PCI_DEVICE_ID_SI_730,
770         PCI_DEVICE_ID_SI_735,
771         PCI_DEVICE_ID_SI_5511, /*
772                                 * 5513 chip has the 0008 device but
773                                 * that ID shows up in other chips so we
774                                 * use the 5511 ID for recognition
775                                 */
776         PCI_DEVICE_ID_SI_5597,
777         PCI_DEVICE_ID_SI_5598,
778         0 };
779 
780 static int sis5595_device_add(unsigned short address)
781 {
782         struct resource res = {
783                 .start  = address,
784                 .end    = address + SIS5595_EXTENT - 1,
785                 .name   = "sis5595",
786                 .flags  = IORESOURCE_IO,
787         };
788         int err;
789 
790         err = acpi_check_resource_conflict(&res);
791         if (err)
792                 goto exit;
793 
794         pdev = platform_device_alloc("sis5595", address);
795         if (!pdev) {
796                 err = -ENOMEM;
797                 pr_err("Device allocation failed\n");
798                 goto exit;
799         }
800 
801         err = platform_device_add_resources(pdev, &res, 1);
802         if (err) {
803                 pr_err("Device resource addition failed (%d)\n", err);
804                 goto exit_device_put;
805         }
806 
807         err = platform_device_add(pdev);
808         if (err) {
809                 pr_err("Device addition failed (%d)\n", err);
810                 goto exit_device_put;
811         }
812 
813         return 0;
814 
815 exit_device_put:
816         platform_device_put(pdev);
817 exit:
818         return err;
819 }
820 
821 static int sis5595_pci_probe(struct pci_dev *dev,
822                                        const struct pci_device_id *id)
823 {
824         u16 address;
825         u8 enable;
826         int *i;
827 
828         for (i = blacklist; *i != 0; i++) {
829                 struct pci_dev *d;
830                 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
831                 if (d) {
832                         dev_err(&d->dev,
833                                 "Looked for SIS5595 but found unsupported device %.4x\n",
834                                 *i);
835                         pci_dev_put(d);
836                         return -ENODEV;
837                 }
838         }
839 
840         force_addr &= ~(SIS5595_EXTENT - 1);
841         if (force_addr) {
842                 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
843                 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
844         }
845 
846         if (PCIBIOS_SUCCESSFUL !=
847             pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
848                 dev_err(&dev->dev, "Failed to read ISA address\n");
849                 return -ENODEV;
850         }
851 
852         address &= ~(SIS5595_EXTENT - 1);
853         if (!address) {
854                 dev_err(&dev->dev,
855                         "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
856                 return -ENODEV;
857         }
858         if (force_addr && address != force_addr) {
859                 /* doesn't work for some chips? */
860                 dev_err(&dev->dev, "Failed to force ISA address\n");
861                 return -ENODEV;
862         }
863 
864         if (PCIBIOS_SUCCESSFUL !=
865             pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
866                 dev_err(&dev->dev, "Failed to read enable register\n");
867                 return -ENODEV;
868         }
869         if (!(enable & 0x80)) {
870                 if ((PCIBIOS_SUCCESSFUL !=
871                      pci_write_config_byte(dev, SIS5595_ENABLE_REG,
872                                            enable | 0x80))
873                  || (PCIBIOS_SUCCESSFUL !=
874                      pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
875                  || (!(enable & 0x80))) {
876                         /* doesn't work for some chips! */
877                         dev_err(&dev->dev, "Failed to enable HWM device\n");
878                         return -ENODEV;
879                 }
880         }
881 
882         if (platform_driver_register(&sis5595_driver)) {
883                 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
884                 goto exit;
885         }
886 
887         s_bridge = pci_dev_get(dev);
888         /* Sets global pdev as a side effect */
889         if (sis5595_device_add(address))
890                 goto exit_unregister;
891 
892         /*
893          * Always return failure here.  This is to allow other drivers to bind
894          * to this pci device.  We don't really want to have control over the
895          * pci device, we only wanted to read as few register values from it.
896          */
897         return -ENODEV;
898 
899 exit_unregister:
900         pci_dev_put(dev);
901         platform_driver_unregister(&sis5595_driver);
902 exit:
903         return -ENODEV;
904 }
905 
906 static struct pci_driver sis5595_pci_driver = {
907         .name            = "sis5595",
908         .id_table        = sis5595_pci_ids,
909         .probe           = sis5595_pci_probe,
910 };
911 
912 static int __init sm_sis5595_init(void)
913 {
914         return pci_register_driver(&sis5595_pci_driver);
915 }
916 
917 static void __exit sm_sis5595_exit(void)
918 {
919         pci_unregister_driver(&sis5595_pci_driver);
920         if (s_bridge != NULL) {
921                 platform_device_unregister(pdev);
922                 platform_driver_unregister(&sis5595_driver);
923                 pci_dev_put(s_bridge);
924                 s_bridge = NULL;
925         }
926 }
927 
928 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
929 MODULE_DESCRIPTION("SiS 5595 Sensor device");
930 MODULE_LICENSE("GPL");
931 
932 module_init(sm_sis5595_init);
933 module_exit(sm_sis5595_exit);
934 

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