Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vt1211.c
Go to the documentation of this file.
1 /*
2  * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
3  * monitoring features
4  * Copyright (C) 2006 Juerg Haefliger <[email protected]>
5  *
6  * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker
7  * and its port to kernel 2.6 by Lars Ekman.
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22  */
23 
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/jiffies.h>
30 #include <linux/platform_device.h>
31 #include <linux/hwmon.h>
32 #include <linux/hwmon-sysfs.h>
33 #include <linux/hwmon-vid.h>
34 #include <linux/err.h>
35 #include <linux/mutex.h>
36 #include <linux/ioport.h>
37 #include <linux/acpi.h>
38 #include <linux/io.h>
39 
40 static int uch_config = -1;
41 module_param(uch_config, int, 0);
42 MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");
43 
44 static int int_mode = -1;
45 module_param(int_mode, int, 0);
46 MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");
47 
48 static unsigned short force_id;
49 module_param(force_id, ushort, 0);
50 MODULE_PARM_DESC(force_id, "Override the detected device ID");
51 
52 static struct platform_device *pdev;
53 
54 #define DRVNAME "vt1211"
55 
56 /* ---------------------------------------------------------------------
57  * Registers
58  *
59  * The sensors are defined as follows.
60  *
61  * Sensor Voltage Mode Temp Mode Notes (from the datasheet)
62  * -------- ------------ --------- --------------------------
63  * Reading 1 temp1 Intel thermal diode
64  * Reading 3 temp2 Internal thermal diode
65  * UCH1/Reading2 in0 temp3 NTC type thermistor
66  * UCH2 in1 temp4 +2.5V
67  * UCH3 in2 temp5 VccP
68  * UCH4 in3 temp6 +5V
69  * UCH5 in4 temp7 +12V
70  * 3.3V in5 Internal VDD (+3.3V)
71  *
72  * --------------------------------------------------------------------- */
73 
74 /* Voltages (in) numbered 0-5 (ix) */
75 #define VT1211_REG_IN(ix) (0x21 + (ix))
76 #define VT1211_REG_IN_MIN(ix) ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
77 #define VT1211_REG_IN_MAX(ix) ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))
78 
79 /* Temperatures (temp) numbered 0-6 (ix) */
80 static u8 regtemp[] = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
81 static u8 regtempmax[] = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
82 static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};
83 
84 /* Fans numbered 0-1 (ix) */
85 #define VT1211_REG_FAN(ix) (0x29 + (ix))
86 #define VT1211_REG_FAN_MIN(ix) (0x3b + (ix))
87 #define VT1211_REG_FAN_DIV 0x47
88 
89 /* PWMs numbered 0-1 (ix) */
90 /* Auto points numbered 0-3 (ap) */
91 #define VT1211_REG_PWM(ix) (0x60 + (ix))
92 #define VT1211_REG_PWM_CLK 0x50
93 #define VT1211_REG_PWM_CTL 0x51
94 #define VT1211_REG_PWM_AUTO_TEMP(ap) (0x55 - (ap))
95 #define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap))
96 
97 /* Miscellaneous registers */
98 #define VT1211_REG_CONFIG 0x40
99 #define VT1211_REG_ALARM1 0x41
100 #define VT1211_REG_ALARM2 0x42
101 #define VT1211_REG_VID 0x45
102 #define VT1211_REG_UCH_CONFIG 0x4a
103 #define VT1211_REG_TEMP1_CONFIG 0x4b
104 #define VT1211_REG_TEMP2_CONFIG 0x4c
105 
106 /* In, temp & fan alarm bits */
107 static const u8 bitalarmin[] = {11, 0, 1, 3, 8, 2, 9};
108 static const u8 bitalarmtemp[] = {4, 15, 11, 0, 1, 3, 8};
109 static const u8 bitalarmfan[] = {6, 7};
110 
111 /* ---------------------------------------------------------------------
112  * Data structures and manipulation thereof
113  * --------------------------------------------------------------------- */
114 
115 struct vt1211_data {
116  unsigned short addr;
117  const char *name;
118  struct device *hwmon_dev;
119 
120  struct mutex update_lock;
121  char valid; /* !=0 if following fields are valid */
122  unsigned long last_updated; /* In jiffies */
123 
124  /* Register values */
125  u8 in[6];
126  u8 in_max[6];
127  u8 in_min[6];
128  u8 temp[7];
129  u8 temp_max[7];
130  u8 temp_hyst[7];
131  u8 fan[2];
132  u8 fan_min[2];
133  u8 fan_div[2];
134  u8 fan_ctl;
135  u8 pwm[2];
136  u8 pwm_ctl[2];
137  u8 pwm_clk;
138  u8 pwm_auto_temp[4];
139  u8 pwm_auto_pwm[2][4];
140  u8 vid; /* Read once at init time */
141  u8 vrm;
142  u8 uch_config; /* Read once at init time */
143  u16 alarms;
144 };
145 
146 /* ix = [0-5] */
147 #define ISVOLT(ix, uch_config) ((ix) > 4 ? 1 : \
148  !(((uch_config) >> ((ix) + 2)) & 1))
149 
150 /* ix = [0-6] */
151 #define ISTEMP(ix, uch_config) ((ix) < 2 ? 1 : \
152  ((uch_config) >> (ix)) & 1)
153 
154 /*
155  * in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
156  * driver according to the VT1211 BIOS porting guide
157  */
158 #define IN_FROM_REG(ix, reg) ((reg) < 3 ? 0 : (ix) == 5 ? \
159  (((reg) - 3) * 15882 + 479) / 958 : \
160  (((reg) - 3) * 10000 + 479) / 958)
161 #define IN_TO_REG(ix, val) (SENSORS_LIMIT((ix) == 5 ? \
162  ((val) * 958 + 7941) / 15882 + 3 : \
163  ((val) * 958 + 5000) / 10000 + 3, 0, 255))
164 
165 /*
166  * temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
167  * temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
168  * according to some measurements that I took on an EPIA M10000.
169  * temp3-7 are thermistor based so the driver returns the voltage measured at
170  * the pin (range 0V - 2.2V).
171  */
172 #define TEMP_FROM_REG(ix, reg) ((ix) == 0 ? (reg) * 1000 : \
173  (ix) == 1 ? (reg) < 51 ? 0 : \
174  ((reg) - 51) * 1000 : \
175  ((253 - (reg)) * 2200 + 105) / 210)
176 #define TEMP_TO_REG(ix, val) SENSORS_LIMIT( \
177  ((ix) == 0 ? ((val) + 500) / 1000 : \
178  (ix) == 1 ? ((val) + 500) / 1000 + 51 : \
179  253 - ((val) * 210 + 1100) / 2200), 0, 255)
180 
181 #define DIV_FROM_REG(reg) (1 << (reg))
182 
183 #define RPM_FROM_REG(reg, div) (((reg) == 0) || ((reg) == 255) ? 0 : \
184  1310720 / (reg) / DIV_FROM_REG(div))
185 #define RPM_TO_REG(val, div) ((val) == 0 ? 255 : \
186  SENSORS_LIMIT((1310720 / (val) / \
187  DIV_FROM_REG(div)), 1, 254))
188 
189 /* ---------------------------------------------------------------------
190  * Super-I/O constants and functions
191  * --------------------------------------------------------------------- */
192 
193 /*
194  * Configuration index port registers
195  * The vt1211 can live at 2 different addresses so we need to probe both
196  */
197 #define SIO_REG_CIP1 0x2e
198 #define SIO_REG_CIP2 0x4e
199 
200 /* Configuration registers */
201 #define SIO_VT1211_LDN 0x07 /* logical device number */
202 #define SIO_VT1211_DEVID 0x20 /* device ID */
203 #define SIO_VT1211_DEVREV 0x21 /* device revision */
204 #define SIO_VT1211_ACTIVE 0x30 /* HW monitor active */
205 #define SIO_VT1211_BADDR 0x60 /* base I/O address */
206 #define SIO_VT1211_ID 0x3c /* VT1211 device ID */
207 
208 /* VT1211 logical device numbers */
209 #define SIO_VT1211_LDN_HWMON 0x0b /* HW monitor */
210 
211 static inline void superio_outb(int sio_cip, int reg, int val)
212 {
213  outb(reg, sio_cip);
214  outb(val, sio_cip + 1);
215 }
216 
217 static inline int superio_inb(int sio_cip, int reg)
218 {
219  outb(reg, sio_cip);
220  return inb(sio_cip + 1);
221 }
222 
223 static inline void superio_select(int sio_cip, int ldn)
224 {
225  outb(SIO_VT1211_LDN, sio_cip);
226  outb(ldn, sio_cip + 1);
227 }
228 
229 static inline void superio_enter(int sio_cip)
230 {
231  outb(0x87, sio_cip);
232  outb(0x87, sio_cip);
233 }
234 
235 static inline void superio_exit(int sio_cip)
236 {
237  outb(0xaa, sio_cip);
238 }
239 
240 /* ---------------------------------------------------------------------
241  * Device I/O access
242  * --------------------------------------------------------------------- */
243 
244 static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
245 {
246  return inb(data->addr + reg);
247 }
248 
249 static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
250 {
251  outb(val, data->addr + reg);
252 }
253 
254 static struct vt1211_data *vt1211_update_device(struct device *dev)
255 {
256  struct vt1211_data *data = dev_get_drvdata(dev);
257  int ix, val;
258 
259  mutex_lock(&data->update_lock);
260 
261  /* registers cache is refreshed after 1 second */
262  if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
263  /* read VID */
264  data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
265 
266  /* voltage (in) registers */
267  for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
268  if (ISVOLT(ix, data->uch_config)) {
269  data->in[ix] = vt1211_read8(data,
270  VT1211_REG_IN(ix));
271  data->in_min[ix] = vt1211_read8(data,
272  VT1211_REG_IN_MIN(ix));
273  data->in_max[ix] = vt1211_read8(data,
274  VT1211_REG_IN_MAX(ix));
275  }
276  }
277 
278  /* temp registers */
279  for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
280  if (ISTEMP(ix, data->uch_config)) {
281  data->temp[ix] = vt1211_read8(data,
282  regtemp[ix]);
283  data->temp_max[ix] = vt1211_read8(data,
284  regtempmax[ix]);
285  data->temp_hyst[ix] = vt1211_read8(data,
286  regtemphyst[ix]);
287  }
288  }
289 
290  /* fan & pwm registers */
291  for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
292  data->fan[ix] = vt1211_read8(data,
293  VT1211_REG_FAN(ix));
294  data->fan_min[ix] = vt1211_read8(data,
295  VT1211_REG_FAN_MIN(ix));
296  data->pwm[ix] = vt1211_read8(data,
297  VT1211_REG_PWM(ix));
298  }
299  val = vt1211_read8(data, VT1211_REG_FAN_DIV);
300  data->fan_div[0] = (val >> 4) & 3;
301  data->fan_div[1] = (val >> 6) & 3;
302  data->fan_ctl = val & 0xf;
303 
304  val = vt1211_read8(data, VT1211_REG_PWM_CTL);
305  data->pwm_ctl[0] = val & 0xf;
306  data->pwm_ctl[1] = (val >> 4) & 0xf;
307 
308  data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
309 
310  /* pwm & temp auto point registers */
311  data->pwm_auto_pwm[0][1] = vt1211_read8(data,
312  VT1211_REG_PWM_AUTO_PWM(0, 1));
313  data->pwm_auto_pwm[0][2] = vt1211_read8(data,
314  VT1211_REG_PWM_AUTO_PWM(0, 2));
315  data->pwm_auto_pwm[1][1] = vt1211_read8(data,
316  VT1211_REG_PWM_AUTO_PWM(1, 1));
317  data->pwm_auto_pwm[1][2] = vt1211_read8(data,
318  VT1211_REG_PWM_AUTO_PWM(1, 2));
319  for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
320  data->pwm_auto_temp[ix] = vt1211_read8(data,
321  VT1211_REG_PWM_AUTO_TEMP(ix));
322  }
323 
324  /* alarm registers */
325  data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
326  vt1211_read8(data, VT1211_REG_ALARM1);
327 
328  data->last_updated = jiffies;
329  data->valid = 1;
330  }
331 
332  mutex_unlock(&data->update_lock);
333 
334  return data;
335 }
336 
337 /* ---------------------------------------------------------------------
338  * Voltage sysfs interfaces
339  * ix = [0-5]
340  * --------------------------------------------------------------------- */
341 
342 #define SHOW_IN_INPUT 0
343 #define SHOW_SET_IN_MIN 1
344 #define SHOW_SET_IN_MAX 2
345 #define SHOW_IN_ALARM 3
346 
347 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
348  char *buf)
349 {
350  struct vt1211_data *data = vt1211_update_device(dev);
351  struct sensor_device_attribute_2 *sensor_attr_2 =
352  to_sensor_dev_attr_2(attr);
353  int ix = sensor_attr_2->index;
354  int fn = sensor_attr_2->nr;
355  int res;
356 
357  switch (fn) {
358  case SHOW_IN_INPUT:
359  res = IN_FROM_REG(ix, data->in[ix]);
360  break;
361  case SHOW_SET_IN_MIN:
362  res = IN_FROM_REG(ix, data->in_min[ix]);
363  break;
364  case SHOW_SET_IN_MAX:
365  res = IN_FROM_REG(ix, data->in_max[ix]);
366  break;
367  case SHOW_IN_ALARM:
368  res = (data->alarms >> bitalarmin[ix]) & 1;
369  break;
370  default:
371  res = 0;
372  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
373  }
374 
375  return sprintf(buf, "%d\n", res);
376 }
377 
378 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
379  const char *buf, size_t count)
380 {
381  struct vt1211_data *data = dev_get_drvdata(dev);
382  struct sensor_device_attribute_2 *sensor_attr_2 =
383  to_sensor_dev_attr_2(attr);
384  int ix = sensor_attr_2->index;
385  int fn = sensor_attr_2->nr;
386  long val;
387  int err;
388 
389  err = kstrtol(buf, 10, &val);
390  if (err)
391  return err;
392 
393  mutex_lock(&data->update_lock);
394  switch (fn) {
395  case SHOW_SET_IN_MIN:
396  data->in_min[ix] = IN_TO_REG(ix, val);
397  vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
398  break;
399  case SHOW_SET_IN_MAX:
400  data->in_max[ix] = IN_TO_REG(ix, val);
401  vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
402  break;
403  default:
404  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
405  }
406  mutex_unlock(&data->update_lock);
407 
408  return count;
409 }
410 
411 /* ---------------------------------------------------------------------
412  * Temperature sysfs interfaces
413  * ix = [0-6]
414  * --------------------------------------------------------------------- */
415 
416 #define SHOW_TEMP_INPUT 0
417 #define SHOW_SET_TEMP_MAX 1
418 #define SHOW_SET_TEMP_MAX_HYST 2
419 #define SHOW_TEMP_ALARM 3
420 
421 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
422  char *buf)
423 {
424  struct vt1211_data *data = vt1211_update_device(dev);
425  struct sensor_device_attribute_2 *sensor_attr_2 =
426  to_sensor_dev_attr_2(attr);
427  int ix = sensor_attr_2->index;
428  int fn = sensor_attr_2->nr;
429  int res;
430 
431  switch (fn) {
432  case SHOW_TEMP_INPUT:
433  res = TEMP_FROM_REG(ix, data->temp[ix]);
434  break;
435  case SHOW_SET_TEMP_MAX:
436  res = TEMP_FROM_REG(ix, data->temp_max[ix]);
437  break;
438  case SHOW_SET_TEMP_MAX_HYST:
439  res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
440  break;
441  case SHOW_TEMP_ALARM:
442  res = (data->alarms >> bitalarmtemp[ix]) & 1;
443  break;
444  default:
445  res = 0;
446  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
447  }
448 
449  return sprintf(buf, "%d\n", res);
450 }
451 
452 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
453  const char *buf, size_t count)
454 {
455  struct vt1211_data *data = dev_get_drvdata(dev);
456  struct sensor_device_attribute_2 *sensor_attr_2 =
457  to_sensor_dev_attr_2(attr);
458  int ix = sensor_attr_2->index;
459  int fn = sensor_attr_2->nr;
460  long val;
461  int err;
462 
463  err = kstrtol(buf, 10, &val);
464  if (err)
465  return err;
466 
467  mutex_lock(&data->update_lock);
468  switch (fn) {
469  case SHOW_SET_TEMP_MAX:
470  data->temp_max[ix] = TEMP_TO_REG(ix, val);
471  vt1211_write8(data, regtempmax[ix],
472  data->temp_max[ix]);
473  break;
474  case SHOW_SET_TEMP_MAX_HYST:
475  data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
476  vt1211_write8(data, regtemphyst[ix],
477  data->temp_hyst[ix]);
478  break;
479  default:
480  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
481  }
482  mutex_unlock(&data->update_lock);
483 
484  return count;
485 }
486 
487 /* ---------------------------------------------------------------------
488  * Fan sysfs interfaces
489  * ix = [0-1]
490  * --------------------------------------------------------------------- */
491 
492 #define SHOW_FAN_INPUT 0
493 #define SHOW_SET_FAN_MIN 1
494 #define SHOW_SET_FAN_DIV 2
495 #define SHOW_FAN_ALARM 3
496 
497 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
498  char *buf)
499 {
500  struct vt1211_data *data = vt1211_update_device(dev);
501  struct sensor_device_attribute_2 *sensor_attr_2 =
502  to_sensor_dev_attr_2(attr);
503  int ix = sensor_attr_2->index;
504  int fn = sensor_attr_2->nr;
505  int res;
506 
507  switch (fn) {
508  case SHOW_FAN_INPUT:
509  res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
510  break;
511  case SHOW_SET_FAN_MIN:
512  res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
513  break;
514  case SHOW_SET_FAN_DIV:
515  res = DIV_FROM_REG(data->fan_div[ix]);
516  break;
517  case SHOW_FAN_ALARM:
518  res = (data->alarms >> bitalarmfan[ix]) & 1;
519  break;
520  default:
521  res = 0;
522  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
523  }
524 
525  return sprintf(buf, "%d\n", res);
526 }
527 
528 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
529  const char *buf, size_t count)
530 {
531  struct vt1211_data *data = dev_get_drvdata(dev);
532  struct sensor_device_attribute_2 *sensor_attr_2 =
533  to_sensor_dev_attr_2(attr);
534  int ix = sensor_attr_2->index;
535  int fn = sensor_attr_2->nr;
536  int reg;
537  unsigned long val;
538  int err;
539 
540  err = kstrtoul(buf, 10, &val);
541  if (err)
542  return err;
543 
544  mutex_lock(&data->update_lock);
545 
546  /* sync the data cache */
547  reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
548  data->fan_div[0] = (reg >> 4) & 3;
549  data->fan_div[1] = (reg >> 6) & 3;
550  data->fan_ctl = reg & 0xf;
551 
552  switch (fn) {
553  case SHOW_SET_FAN_MIN:
554  data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
555  vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
556  data->fan_min[ix]);
557  break;
558  case SHOW_SET_FAN_DIV:
559  switch (val) {
560  case 1:
561  data->fan_div[ix] = 0;
562  break;
563  case 2:
564  data->fan_div[ix] = 1;
565  break;
566  case 4:
567  data->fan_div[ix] = 2;
568  break;
569  case 8:
570  data->fan_div[ix] = 3;
571  break;
572  default:
573  count = -EINVAL;
574  dev_warn(dev, "fan div value %ld not supported. "
575  "Choose one of 1, 2, 4, or 8.\n", val);
576  goto EXIT;
577  }
578  vt1211_write8(data, VT1211_REG_FAN_DIV,
579  ((data->fan_div[1] << 6) |
580  (data->fan_div[0] << 4) |
581  data->fan_ctl));
582  break;
583  default:
584  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
585  }
586 
587 EXIT:
588  mutex_unlock(&data->update_lock);
589  return count;
590 }
591 
592 /* ---------------------------------------------------------------------
593  * PWM sysfs interfaces
594  * ix = [0-1]
595  * --------------------------------------------------------------------- */
596 
597 #define SHOW_PWM 0
598 #define SHOW_SET_PWM_ENABLE 1
599 #define SHOW_SET_PWM_FREQ 2
600 #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
601 
602 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
603  char *buf)
604 {
605  struct vt1211_data *data = vt1211_update_device(dev);
606  struct sensor_device_attribute_2 *sensor_attr_2 =
607  to_sensor_dev_attr_2(attr);
608  int ix = sensor_attr_2->index;
609  int fn = sensor_attr_2->nr;
610  int res;
611 
612  switch (fn) {
613  case SHOW_PWM:
614  res = data->pwm[ix];
615  break;
616  case SHOW_SET_PWM_ENABLE:
617  res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
618  break;
619  case SHOW_SET_PWM_FREQ:
620  res = 90000 >> (data->pwm_clk & 7);
621  break;
622  case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
623  res = (data->pwm_ctl[ix] & 7) + 1;
624  break;
625  default:
626  res = 0;
627  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
628  }
629 
630  return sprintf(buf, "%d\n", res);
631 }
632 
633 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
634  const char *buf, size_t count)
635 {
636  struct vt1211_data *data = dev_get_drvdata(dev);
637  struct sensor_device_attribute_2 *sensor_attr_2 =
638  to_sensor_dev_attr_2(attr);
639  int ix = sensor_attr_2->index;
640  int fn = sensor_attr_2->nr;
641  int tmp, reg;
642  unsigned long val;
643  int err;
644 
645  err = kstrtoul(buf, 10, &val);
646  if (err)
647  return err;
648 
649  mutex_lock(&data->update_lock);
650 
651  switch (fn) {
652  case SHOW_SET_PWM_ENABLE:
653  /* sync the data cache */
654  reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
655  data->fan_div[0] = (reg >> 4) & 3;
656  data->fan_div[1] = (reg >> 6) & 3;
657  data->fan_ctl = reg & 0xf;
658  reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
659  data->pwm_ctl[0] = reg & 0xf;
660  data->pwm_ctl[1] = (reg >> 4) & 0xf;
661  switch (val) {
662  case 0:
663  data->pwm_ctl[ix] &= 7;
664  /*
665  * disable SmartGuardian if both PWM outputs are
666  * disabled
667  */
668  if ((data->pwm_ctl[ix ^ 1] & 1) == 0)
669  data->fan_ctl &= 0xe;
670  break;
671  case 2:
672  data->pwm_ctl[ix] |= 8;
673  data->fan_ctl |= 1;
674  break;
675  default:
676  count = -EINVAL;
677  dev_warn(dev, "pwm mode %ld not supported. "
678  "Choose one of 0 or 2.\n", val);
679  goto EXIT;
680  }
681  vt1211_write8(data, VT1211_REG_PWM_CTL,
682  ((data->pwm_ctl[1] << 4) |
683  data->pwm_ctl[0]));
684  vt1211_write8(data, VT1211_REG_FAN_DIV,
685  ((data->fan_div[1] << 6) |
686  (data->fan_div[0] << 4) |
687  data->fan_ctl));
688  break;
689  case SHOW_SET_PWM_FREQ:
690  val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000);
691  /* calculate tmp = log2(val) */
692  tmp = 0;
693  for (val >>= 1; val > 0; val >>= 1)
694  tmp++;
695  /* sync the data cache */
696  reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
697  data->pwm_clk = (reg & 0xf8) | tmp;
698  vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
699  break;
700  case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
701  if (val < 1 || val > 7) {
702  count = -EINVAL;
703  dev_warn(dev, "temp channel %ld not supported. "
704  "Choose a value between 1 and 7.\n", val);
705  goto EXIT;
706  }
707  if (!ISTEMP(val - 1, data->uch_config)) {
708  count = -EINVAL;
709  dev_warn(dev, "temp channel %ld is not available.\n",
710  val);
711  goto EXIT;
712  }
713  /* sync the data cache */
714  reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
715  data->pwm_ctl[0] = reg & 0xf;
716  data->pwm_ctl[1] = (reg >> 4) & 0xf;
717  data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
718  vt1211_write8(data, VT1211_REG_PWM_CTL,
719  ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
720  break;
721  default:
722  dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
723  }
724 
725 EXIT:
726  mutex_unlock(&data->update_lock);
727  return count;
728 }
729 
730 /* ---------------------------------------------------------------------
731  * PWM auto point definitions
732  * ix = [0-1]
733  * ap = [0-3]
734  * --------------------------------------------------------------------- */
735 
736 /*
737  * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
738  * Note that there is only a single set of temp auto points that controls both
739  * PWM controllers. We still create 2 sets of sysfs files to make it look
740  * more consistent even though they map to the same registers.
741  *
742  * ix ap : description
743  * -------------------
744  * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0])
745  * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
746  * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
747  * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
748  * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0])
749  * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
750  * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
751  * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
752  */
753 
754 static ssize_t show_pwm_auto_point_temp(struct device *dev,
755  struct device_attribute *attr,
756  char *buf)
757 {
758  struct vt1211_data *data = vt1211_update_device(dev);
759  struct sensor_device_attribute_2 *sensor_attr_2 =
760  to_sensor_dev_attr_2(attr);
761  int ix = sensor_attr_2->index;
762  int ap = sensor_attr_2->nr;
763 
764  return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
765  data->pwm_auto_temp[ap]));
766 }
767 
768 static ssize_t set_pwm_auto_point_temp(struct device *dev,
769  struct device_attribute *attr,
770  const char *buf, size_t count)
771 {
772  struct vt1211_data *data = dev_get_drvdata(dev);
773  struct sensor_device_attribute_2 *sensor_attr_2 =
774  to_sensor_dev_attr_2(attr);
775  int ix = sensor_attr_2->index;
776  int ap = sensor_attr_2->nr;
777  int reg;
778  long val;
779  int err;
780 
781  err = kstrtol(buf, 10, &val);
782  if (err)
783  return err;
784 
785 
786  mutex_lock(&data->update_lock);
787 
788  /* sync the data cache */
789  reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
790  data->pwm_ctl[0] = reg & 0xf;
791  data->pwm_ctl[1] = (reg >> 4) & 0xf;
792 
793  data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
794  vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
795  data->pwm_auto_temp[ap]);
796  mutex_unlock(&data->update_lock);
797 
798  return count;
799 }
800 
801 /*
802  * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
803  * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
804  * be changed.
805  *
806  * ix ap : description
807  * -------------------
808  * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0)
809  * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1])
810  * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
811  * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255)
812  * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0)
813  * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1])
814  * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
815  * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255)
816  */
817 
818 static ssize_t show_pwm_auto_point_pwm(struct device *dev,
819  struct device_attribute *attr,
820  char *buf)
821 {
822  struct vt1211_data *data = vt1211_update_device(dev);
823  struct sensor_device_attribute_2 *sensor_attr_2 =
824  to_sensor_dev_attr_2(attr);
825  int ix = sensor_attr_2->index;
826  int ap = sensor_attr_2->nr;
827 
828  return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
829 }
830 
831 static ssize_t set_pwm_auto_point_pwm(struct device *dev,
832  struct device_attribute *attr,
833  const char *buf, size_t count)
834 {
835  struct vt1211_data *data = dev_get_drvdata(dev);
836  struct sensor_device_attribute_2 *sensor_attr_2 =
837  to_sensor_dev_attr_2(attr);
838  int ix = sensor_attr_2->index;
839  int ap = sensor_attr_2->nr;
840  unsigned long val;
841  int err;
842 
843  err = kstrtoul(buf, 10, &val);
844  if (err)
845  return err;
846 
847  mutex_lock(&data->update_lock);
848  data->pwm_auto_pwm[ix][ap] = SENSORS_LIMIT(val, 0, 255);
849  vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
850  data->pwm_auto_pwm[ix][ap]);
851  mutex_unlock(&data->update_lock);
852 
853  return count;
854 }
855 
856 /* ---------------------------------------------------------------------
857  * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
858  * --------------------------------------------------------------------- */
859 
860 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
861  char *buf)
862 {
863  struct vt1211_data *data = dev_get_drvdata(dev);
864 
865  return sprintf(buf, "%d\n", data->vrm);
866 }
867 
868 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
869  const char *buf, size_t count)
870 {
871  struct vt1211_data *data = dev_get_drvdata(dev);
872  unsigned long val;
873  int err;
874 
875  err = kstrtoul(buf, 10, &val);
876  if (err)
877  return err;
878 
879  data->vrm = val;
880 
881  return count;
882 }
883 
884 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
885  char *buf)
886 {
887  struct vt1211_data *data = dev_get_drvdata(dev);
888 
889  return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
890 }
891 
892 static ssize_t show_name(struct device *dev,
893  struct device_attribute *attr, char *buf)
894 {
895  struct vt1211_data *data = dev_get_drvdata(dev);
896 
897  return sprintf(buf, "%s\n", data->name);
898 }
899 
900 static ssize_t show_alarms(struct device *dev,
901  struct device_attribute *attr, char *buf)
902 {
903  struct vt1211_data *data = vt1211_update_device(dev);
904 
905  return sprintf(buf, "%d\n", data->alarms);
906 }
907 
908 /* ---------------------------------------------------------------------
909  * Device attribute structs
910  * --------------------------------------------------------------------- */
911 
912 #define SENSOR_ATTR_IN(ix) \
913 { SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
914  show_in, NULL, SHOW_IN_INPUT, ix), \
915  SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
916  show_in, set_in, SHOW_SET_IN_MIN, ix), \
917  SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
918  show_in, set_in, SHOW_SET_IN_MAX, ix), \
919  SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
920  show_in, NULL, SHOW_IN_ALARM, ix) \
921 }
922 
923 static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = {
924  SENSOR_ATTR_IN(0),
925  SENSOR_ATTR_IN(1),
926  SENSOR_ATTR_IN(2),
927  SENSOR_ATTR_IN(3),
928  SENSOR_ATTR_IN(4),
929  SENSOR_ATTR_IN(5)
930 };
931 
932 #define IN_UNIT_ATTRS(X) \
933 { &vt1211_sysfs_in[X][0].dev_attr.attr, \
934  &vt1211_sysfs_in[X][1].dev_attr.attr, \
935  &vt1211_sysfs_in[X][2].dev_attr.attr, \
936  &vt1211_sysfs_in[X][3].dev_attr.attr, \
937  NULL \
938 }
939 
940 static struct attribute *vt1211_in_attr[][5] = {
941  IN_UNIT_ATTRS(0),
942  IN_UNIT_ATTRS(1),
943  IN_UNIT_ATTRS(2),
944  IN_UNIT_ATTRS(3),
945  IN_UNIT_ATTRS(4),
946  IN_UNIT_ATTRS(5)
947 };
948 
949 static const struct attribute_group vt1211_in_attr_group[] = {
950  { .attrs = vt1211_in_attr[0] },
951  { .attrs = vt1211_in_attr[1] },
952  { .attrs = vt1211_in_attr[2] },
953  { .attrs = vt1211_in_attr[3] },
954  { .attrs = vt1211_in_attr[4] },
955  { .attrs = vt1211_in_attr[5] }
956 };
957 
958 #define SENSOR_ATTR_TEMP(ix) \
959 { SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
960  show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
961  SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
962  show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
963  SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
964  show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
965  SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
966  show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \
967 }
968 
969 static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = {
970  SENSOR_ATTR_TEMP(1),
971  SENSOR_ATTR_TEMP(2),
972  SENSOR_ATTR_TEMP(3),
973  SENSOR_ATTR_TEMP(4),
974  SENSOR_ATTR_TEMP(5),
975  SENSOR_ATTR_TEMP(6),
976  SENSOR_ATTR_TEMP(7),
977 };
978 
979 #define TEMP_UNIT_ATTRS(X) \
980 { &vt1211_sysfs_temp[X][0].dev_attr.attr, \
981  &vt1211_sysfs_temp[X][1].dev_attr.attr, \
982  &vt1211_sysfs_temp[X][2].dev_attr.attr, \
983  &vt1211_sysfs_temp[X][3].dev_attr.attr, \
984  NULL \
985 }
986 
987 static struct attribute *vt1211_temp_attr[][5] = {
988  TEMP_UNIT_ATTRS(0),
989  TEMP_UNIT_ATTRS(1),
990  TEMP_UNIT_ATTRS(2),
991  TEMP_UNIT_ATTRS(3),
992  TEMP_UNIT_ATTRS(4),
993  TEMP_UNIT_ATTRS(5),
994  TEMP_UNIT_ATTRS(6)
995 };
996 
997 static const struct attribute_group vt1211_temp_attr_group[] = {
998  { .attrs = vt1211_temp_attr[0] },
999  { .attrs = vt1211_temp_attr[1] },
1000  { .attrs = vt1211_temp_attr[2] },
1001  { .attrs = vt1211_temp_attr[3] },
1002  { .attrs = vt1211_temp_attr[4] },
1003  { .attrs = vt1211_temp_attr[5] },
1004  { .attrs = vt1211_temp_attr[6] }
1005 };
1006 
1007 #define SENSOR_ATTR_FAN(ix) \
1008  SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
1009  show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
1010  SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1011  show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
1012  SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
1013  show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
1014  SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1015  show_fan, NULL, SHOW_FAN_ALARM, ix-1)
1016 
1017 #define SENSOR_ATTR_PWM(ix) \
1018  SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
1019  show_pwm, NULL, SHOW_PWM, ix-1), \
1020  SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
1021  show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
1022  SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
1023  show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
1024 
1025 #define SENSOR_ATTR_PWM_FREQ(ix) \
1026  SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
1027  show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
1028 
1029 #define SENSOR_ATTR_PWM_FREQ_RO(ix) \
1030  SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1031  show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
1032 
1033 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1034  SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1035  show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1036  ap-1, ix-1)
1037 
1038 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1039  SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1040  show_pwm_auto_point_temp, NULL, \
1041  ap-1, ix-1)
1042 
1043 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1044  SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1045  show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1046  ap-1, ix-1)
1047 
1048 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1049  SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1050  show_pwm_auto_point_pwm, NULL, \
1051  ap-1, ix-1)
1052 
1053 static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1054  SENSOR_ATTR_FAN(1),
1055  SENSOR_ATTR_FAN(2),
1056  SENSOR_ATTR_PWM(1),
1057  SENSOR_ATTR_PWM(2),
1058  SENSOR_ATTR_PWM_FREQ(1),
1059  SENSOR_ATTR_PWM_FREQ_RO(2),
1060  SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1061  SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1062  SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1063  SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1064  SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1065  SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1066  SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1067  SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1068  SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1069  SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1070  SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1071  SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1072  SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1073  SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1074  SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1075  SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1076 };
1077 
1078 static struct device_attribute vt1211_sysfs_misc[] = {
1079  __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1080  __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1081  __ATTR(name, S_IRUGO, show_name, NULL),
1082  __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1083 };
1084 
1085 /* ---------------------------------------------------------------------
1086  * Device registration and initialization
1087  * --------------------------------------------------------------------- */
1088 
1089 static void __devinit vt1211_init_device(struct vt1211_data *data)
1090 {
1091  /* set VRM */
1092  data->vrm = vid_which_vrm();
1093 
1094  /* Read (and initialize) UCH config */
1095  data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1096  if (uch_config > -1) {
1097  data->uch_config = (data->uch_config & 0x83) |
1098  (uch_config << 2);
1099  vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1100  }
1101 
1102  /*
1103  * Initialize the interrupt mode (if request at module load time).
1104  * The VT1211 implements 3 different modes for clearing interrupts:
1105  * 0: Clear INT when status register is read. Regenerate INT as long
1106  * as temp stays above hysteresis limit.
1107  * 1: Clear INT when status register is read. DON'T regenerate INT
1108  * until temp falls below hysteresis limit and exceeds hot limit
1109  * again.
1110  * 2: Clear INT when temp falls below max limit.
1111  *
1112  * The driver only allows to force mode 0 since that's the only one
1113  * that makes sense for 'sensors'
1114  */
1115  if (int_mode == 0) {
1116  vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1117  vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1118  }
1119 
1120  /* Fill in some hard wired values into our data struct */
1121  data->pwm_auto_pwm[0][3] = 255;
1122  data->pwm_auto_pwm[1][3] = 255;
1123 }
1124 
1125 static void vt1211_remove_sysfs(struct platform_device *pdev)
1126 {
1127  struct device *dev = &pdev->dev;
1128  int i;
1129 
1130  for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++)
1131  sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
1132 
1133  for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
1134  sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
1135 
1136  for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1137  device_remove_file(dev,
1138  &vt1211_sysfs_fan_pwm[i].dev_attr);
1139  }
1140  for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++)
1141  device_remove_file(dev, &vt1211_sysfs_misc[i]);
1142 }
1143 
1144 static int __devinit vt1211_probe(struct platform_device *pdev)
1145 {
1146  struct device *dev = &pdev->dev;
1147  struct vt1211_data *data;
1148  struct resource *res;
1149  int i, err;
1150 
1151  data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
1152  if (!data) {
1153  dev_err(dev, "Out of memory\n");
1154  return -ENOMEM;
1155  }
1156 
1157  res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1158  if (!devm_request_region(dev, res->start, resource_size(res),
1159  DRVNAME)) {
1160  dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1161  (unsigned long)res->start, (unsigned long)res->end);
1162  return -EBUSY;
1163  }
1164  data->addr = res->start;
1165  data->name = DRVNAME;
1166  mutex_init(&data->update_lock);
1167 
1168  platform_set_drvdata(pdev, data);
1169 
1170  /* Initialize the VT1211 chip */
1171  vt1211_init_device(data);
1172 
1173  /* Create sysfs interface files */
1174  for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) {
1175  if (ISVOLT(i, data->uch_config)) {
1176  err = sysfs_create_group(&dev->kobj,
1177  &vt1211_in_attr_group[i]);
1178  if (err)
1179  goto EXIT_DEV_REMOVE;
1180  }
1181  }
1182  for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
1183  if (ISTEMP(i, data->uch_config)) {
1184  err = sysfs_create_group(&dev->kobj,
1185  &vt1211_temp_attr_group[i]);
1186  if (err)
1187  goto EXIT_DEV_REMOVE;
1188  }
1189  }
1190  for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1191  err = device_create_file(dev,
1192  &vt1211_sysfs_fan_pwm[i].dev_attr);
1193  if (err)
1194  goto EXIT_DEV_REMOVE;
1195  }
1196  for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1197  err = device_create_file(dev,
1198  &vt1211_sysfs_misc[i]);
1199  if (err)
1200  goto EXIT_DEV_REMOVE;
1201  }
1202 
1203  /* Register device */
1204  data->hwmon_dev = hwmon_device_register(dev);
1205  if (IS_ERR(data->hwmon_dev)) {
1206  err = PTR_ERR(data->hwmon_dev);
1207  dev_err(dev, "Class registration failed (%d)\n", err);
1208  goto EXIT_DEV_REMOVE_SILENT;
1209  }
1210 
1211  return 0;
1212 
1213 EXIT_DEV_REMOVE:
1214  dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1215 EXIT_DEV_REMOVE_SILENT:
1216  vt1211_remove_sysfs(pdev);
1217  return err;
1218 }
1219 
1220 static int __devexit vt1211_remove(struct platform_device *pdev)
1221 {
1222  struct vt1211_data *data = platform_get_drvdata(pdev);
1223 
1224  hwmon_device_unregister(data->hwmon_dev);
1225  vt1211_remove_sysfs(pdev);
1226 
1227  return 0;
1228 }
1229 
1230 static struct platform_driver vt1211_driver = {
1231  .driver = {
1232  .owner = THIS_MODULE,
1233  .name = DRVNAME,
1234  },
1235  .probe = vt1211_probe,
1236  .remove = __devexit_p(vt1211_remove),
1237 };
1238 
1239 static int __init vt1211_device_add(unsigned short address)
1240 {
1241  struct resource res = {
1242  .start = address,
1243  .end = address + 0x7f,
1244  .flags = IORESOURCE_IO,
1245  };
1246  int err;
1247 
1248  pdev = platform_device_alloc(DRVNAME, address);
1249  if (!pdev) {
1250  err = -ENOMEM;
1251  pr_err("Device allocation failed (%d)\n", err);
1252  goto EXIT;
1253  }
1254 
1255  res.name = pdev->name;
1256  err = acpi_check_resource_conflict(&res);
1257  if (err)
1258  goto EXIT_DEV_PUT;
1259 
1260  err = platform_device_add_resources(pdev, &res, 1);
1261  if (err) {
1262  pr_err("Device resource addition failed (%d)\n", err);
1263  goto EXIT_DEV_PUT;
1264  }
1265 
1266  err = platform_device_add(pdev);
1267  if (err) {
1268  pr_err("Device addition failed (%d)\n", err);
1269  goto EXIT_DEV_PUT;
1270  }
1271 
1272  return 0;
1273 
1274 EXIT_DEV_PUT:
1275  platform_device_put(pdev);
1276 EXIT:
1277  return err;
1278 }
1279 
1280 static int __init vt1211_find(int sio_cip, unsigned short *address)
1281 {
1282  int err = -ENODEV;
1283  int devid;
1284 
1285  superio_enter(sio_cip);
1286 
1287  devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1288  if (devid != SIO_VT1211_ID)
1289  goto EXIT;
1290 
1291  superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1292 
1293  if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1294  pr_warn("HW monitor is disabled, skipping\n");
1295  goto EXIT;
1296  }
1297 
1298  *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1299  (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1300  if (*address == 0) {
1301  pr_warn("Base address is not set, skipping\n");
1302  goto EXIT;
1303  }
1304 
1305  err = 0;
1306  pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
1307  *address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
1308 
1309 EXIT:
1310  superio_exit(sio_cip);
1311  return err;
1312 }
1313 
1314 static int __init vt1211_init(void)
1315 {
1316  int err;
1317  unsigned short address = 0;
1318 
1319  err = vt1211_find(SIO_REG_CIP1, &address);
1320  if (err) {
1321  err = vt1211_find(SIO_REG_CIP2, &address);
1322  if (err)
1323  goto EXIT;
1324  }
1325 
1326  if ((uch_config < -1) || (uch_config > 31)) {
1327  err = -EINVAL;
1328  pr_warn("Invalid UCH configuration %d. "
1329  "Choose a value between 0 and 31.\n", uch_config);
1330  goto EXIT;
1331  }
1332 
1333  if ((int_mode < -1) || (int_mode > 0)) {
1334  err = -EINVAL;
1335  pr_warn("Invalid interrupt mode %d. "
1336  "Only mode 0 is supported.\n", int_mode);
1337  goto EXIT;
1338  }
1339 
1340  err = platform_driver_register(&vt1211_driver);
1341  if (err)
1342  goto EXIT;
1343 
1344  /* Sets global pdev as a side effect */
1345  err = vt1211_device_add(address);
1346  if (err)
1347  goto EXIT_DRV_UNREGISTER;
1348 
1349  return 0;
1350 
1351 EXIT_DRV_UNREGISTER:
1352  platform_driver_unregister(&vt1211_driver);
1353 EXIT:
1354  return err;
1355 }
1356 
1357 static void __exit vt1211_exit(void)
1358 {
1359  platform_device_unregister(pdev);
1360  platform_driver_unregister(&vt1211_driver);
1361 }
1362 
1363 MODULE_AUTHOR("Juerg Haefliger <[email protected]>");
1364 MODULE_DESCRIPTION("VT1211 sensors");
1365 MODULE_LICENSE("GPL");
1366 
1367 module_init(vt1211_init);
1368 module_exit(vt1211_exit);
Generated on Thu Jan 10 2013 13:35:19 for Linux Kernel by   doxygen 1.8.2