1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
4 * monitoring features
5 * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com>
6 *
7 * This driver is based on the driver for kernel 2.4 by Mark D. Studebaker
8 * and its port to kernel 2.6 by Lars Ekman.
9 */
10
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/jiffies.h>
17 #include <linux/platform_device.h>
18 #include <linux/hwmon.h>
19 #include <linux/hwmon-sysfs.h>
20 #include <linux/hwmon-vid.h>
21 #include <linux/err.h>
22 #include <linux/mutex.h>
23 #include <linux/ioport.h>
24 #include <linux/acpi.h>
25 #include <linux/io.h>
26
27 static int uch_config = -1;
28 module_param(uch_config, int, 0);
29 MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");
30
31 static int int_mode = -1;
32 module_param(int_mode, int, 0);
33 MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");
34
35 static unsigned short force_id;
36 module_param(force_id, ushort, 0);
37 MODULE_PARM_DESC(force_id, "Override the detected device ID");
38
39 static struct platform_device *pdev;
40
41 #define DRVNAME "vt1211"
42
43 /* ---------------------------------------------------------------------
44 * Registers
45 *
46 * The sensors are defined as follows.
47 *
48 * Sensor Voltage Mode Temp Mode Notes (from the datasheet)
49 * -------- ------------ --------- --------------------------
50 * Reading 1 temp1 Intel thermal diode
51 * Reading 3 temp2 Internal thermal diode
52 * UCH1/Reading2 in0 temp3 NTC type thermistor
53 * UCH2 in1 temp4 +2.5V
54 * UCH3 in2 temp5 VccP
55 * UCH4 in3 temp6 +5V
56 * UCH5 in4 temp7 +12V
57 * 3.3V in5 Internal VDD (+3.3V)
58 *
59 * --------------------------------------------------------------------- */
60
61 /* Voltages (in) numbered 0-5 (ix) */
62 #define VT1211_REG_IN(ix) (0x21 + (ix))
63 #define VT1211_REG_IN_MIN(ix) ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
64 #define VT1211_REG_IN_MAX(ix) ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))
65
66 /* Temperatures (temp) numbered 0-6 (ix) */
67 static u8 regtemp[] = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
68 static u8 regtempmax[] = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
69 static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};
70
71 /* Fans numbered 0-1 (ix) */
72 #define VT1211_REG_FAN(ix) (0x29 + (ix))
73 #define VT1211_REG_FAN_MIN(ix) (0x3b + (ix))
74 #define VT1211_REG_FAN_DIV 0x47
75
76 /* PWMs numbered 0-1 (ix) */
77 /* Auto points numbered 0-3 (ap) */
78 #define VT1211_REG_PWM(ix) (0x60 + (ix))
79 #define VT1211_REG_PWM_CLK 0x50
80 #define VT1211_REG_PWM_CTL 0x51
81 #define VT1211_REG_PWM_AUTO_TEMP(ap) (0x55 - (ap))
82 #define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap))
83
84 /* Miscellaneous registers */
85 #define VT1211_REG_CONFIG 0x40
86 #define VT1211_REG_ALARM1 0x41
87 #define VT1211_REG_ALARM2 0x42
88 #define VT1211_REG_VID 0x45
89 #define VT1211_REG_UCH_CONFIG 0x4a
90 #define VT1211_REG_TEMP1_CONFIG 0x4b
91 #define VT1211_REG_TEMP2_CONFIG 0x4c
92
93 /* In, temp & fan alarm bits */
94 static const u8 bitalarmin[] = {11, 0, 1, 3, 8, 2, 9};
95 static const u8 bitalarmtemp[] = {4, 15, 11, 0, 1, 3, 8};
96 static const u8 bitalarmfan[] = {6, 7};
97
98 /* ---------------------------------------------------------------------
99 * Data structures and manipulation thereof
100 * --------------------------------------------------------------------- */
101
102 struct vt1211_data {
103 unsigned short addr;
104 const char *name;
105 struct device *hwmon_dev;
106
107 struct mutex update_lock;
108 bool valid; /* true if following fields are valid */
109 unsigned long last_updated; /* In jiffies */
110
111 /* Register values */
112 u8 in[6];
113 u8 in_max[6];
114 u8 in_min[6];
115 u8 temp[7];
116 u8 temp_max[7];
117 u8 temp_hyst[7];
118 u8 fan[2];
119 u8 fan_min[2];
120 u8 fan_div[2];
121 u8 fan_ctl;
122 u8 pwm[2];
123 u8 pwm_ctl[2];
124 u8 pwm_clk;
125 u8 pwm_auto_temp[4];
126 u8 pwm_auto_pwm[2][4];
127 u8 vid; /* Read once at init time */
128 u8 vrm;
129 u8 uch_config; /* Read once at init time */
130 u16 alarms;
131 };
132
133 /* ix = [0-5] */
134 #define ISVOLT(ix, uch_config) ((ix) > 4 ? 1 : \
135 !(((uch_config) >> ((ix) + 2)) & 1))
136
137 /* ix = [0-6] */
138 #define ISTEMP(ix, uch_config) ((ix) < 2 ? 1 : \
139 ((uch_config) >> (ix)) & 1)
140
141 /*
142 * in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
143 * driver according to the VT1211 BIOS porting guide
144 */
145 #define IN_FROM_REG(ix, reg) ((reg) < 3 ? 0 : (ix) == 5 ? \
146 (((reg) - 3) * 15882 + 479) / 958 : \
147 (((reg) - 3) * 10000 + 479) / 958)
148 #define IN_TO_REG(ix, val) (clamp_val((ix) == 5 ? \
149 ((val) * 958 + 7941) / 15882 + 3 : \
150 ((val) * 958 + 5000) / 10000 + 3, 0, 255))
151
152 /*
153 * temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
154 * temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
155 * according to some measurements that I took on an EPIA M10000.
156 * temp3-7 are thermistor based so the driver returns the voltage measured at
157 * the pin (range 0V - 2.2V).
158 */
159 #define TEMP_FROM_REG(ix, reg) ((ix) == 0 ? (reg) * 1000 : \
160 (ix) == 1 ? (reg) < 51 ? 0 : \
161 ((reg) - 51) * 1000 : \
162 ((253 - (reg)) * 2200 + 105) / 210)
163 #define TEMP_TO_REG(ix, val) clamp_val( \
164 ((ix) == 0 ? ((val) + 500) / 1000 : \
165 (ix) == 1 ? ((val) + 500) / 1000 + 51 : \
166 253 - ((val) * 210 + 1100) / 2200), 0, 255)
167
168 #define DIV_FROM_REG(reg) (1 << (reg))
169
170 #define RPM_FROM_REG(reg, div) (((reg) == 0) || ((reg) == 255) ? 0 : \
171 1310720 / (reg) / DIV_FROM_REG(div))
172 #define RPM_TO_REG(val, div) ((val) == 0 ? 255 : \
173 clamp_val((1310720 / (val) / \
174 DIV_FROM_REG(div)), 1, 254))
175
176 /* ---------------------------------------------------------------------
177 * Super-I/O constants and functions
178 * --------------------------------------------------------------------- */
179
180 /*
181 * Configuration index port registers
182 * The vt1211 can live at 2 different addresses so we need to probe both
183 */
184 #define SIO_REG_CIP1 0x2e
185 #define SIO_REG_CIP2 0x4e
186
187 /* Configuration registers */
188 #define SIO_VT1211_LDN 0x07 /* logical device number */
189 #define SIO_VT1211_DEVID 0x20 /* device ID */
190 #define SIO_VT1211_DEVREV 0x21 /* device revision */
191 #define SIO_VT1211_ACTIVE 0x30 /* HW monitor active */
192 #define SIO_VT1211_BADDR 0x60 /* base I/O address */
193 #define SIO_VT1211_ID 0x3c /* VT1211 device ID */
194
195 /* VT1211 logical device numbers */
196 #define SIO_VT1211_LDN_HWMON 0x0b /* HW monitor */
197
superio_inb(int sio_cip,int reg)198 static inline int superio_inb(int sio_cip, int reg)
199 {
200 outb(reg, sio_cip);
201 return inb(sio_cip + 1);
202 }
203
superio_select(int sio_cip,int ldn)204 static inline void superio_select(int sio_cip, int ldn)
205 {
206 outb(SIO_VT1211_LDN, sio_cip);
207 outb(ldn, sio_cip + 1);
208 }
209
superio_enter(int sio_cip)210 static inline int superio_enter(int sio_cip)
211 {
212 if (!request_muxed_region(sio_cip, 2, DRVNAME))
213 return -EBUSY;
214
215 outb(0x87, sio_cip);
216 outb(0x87, sio_cip);
217
218 return 0;
219 }
220
superio_exit(int sio_cip)221 static inline void superio_exit(int sio_cip)
222 {
223 outb(0xaa, sio_cip);
224 release_region(sio_cip, 2);
225 }
226
227 /* ---------------------------------------------------------------------
228 * Device I/O access
229 * --------------------------------------------------------------------- */
230
vt1211_read8(struct vt1211_data * data,u8 reg)231 static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
232 {
233 return inb(data->addr + reg);
234 }
235
vt1211_write8(struct vt1211_data * data,u8 reg,u8 val)236 static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
237 {
238 outb(val, data->addr + reg);
239 }
240
vt1211_update_device(struct device * dev)241 static struct vt1211_data *vt1211_update_device(struct device *dev)
242 {
243 struct vt1211_data *data = dev_get_drvdata(dev);
244 int ix, val;
245
246 mutex_lock(&data->update_lock);
247
248 /* registers cache is refreshed after 1 second */
249 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
250 /* read VID */
251 data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
252
253 /* voltage (in) registers */
254 for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
255 if (ISVOLT(ix, data->uch_config)) {
256 data->in[ix] = vt1211_read8(data,
257 VT1211_REG_IN(ix));
258 data->in_min[ix] = vt1211_read8(data,
259 VT1211_REG_IN_MIN(ix));
260 data->in_max[ix] = vt1211_read8(data,
261 VT1211_REG_IN_MAX(ix));
262 }
263 }
264
265 /* temp registers */
266 for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
267 if (ISTEMP(ix, data->uch_config)) {
268 data->temp[ix] = vt1211_read8(data,
269 regtemp[ix]);
270 data->temp_max[ix] = vt1211_read8(data,
271 regtempmax[ix]);
272 data->temp_hyst[ix] = vt1211_read8(data,
273 regtemphyst[ix]);
274 }
275 }
276
277 /* fan & pwm registers */
278 for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
279 data->fan[ix] = vt1211_read8(data,
280 VT1211_REG_FAN(ix));
281 data->fan_min[ix] = vt1211_read8(data,
282 VT1211_REG_FAN_MIN(ix));
283 data->pwm[ix] = vt1211_read8(data,
284 VT1211_REG_PWM(ix));
285 }
286 val = vt1211_read8(data, VT1211_REG_FAN_DIV);
287 data->fan_div[0] = (val >> 4) & 3;
288 data->fan_div[1] = (val >> 6) & 3;
289 data->fan_ctl = val & 0xf;
290
291 val = vt1211_read8(data, VT1211_REG_PWM_CTL);
292 data->pwm_ctl[0] = val & 0xf;
293 data->pwm_ctl[1] = (val >> 4) & 0xf;
294
295 data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
296
297 /* pwm & temp auto point registers */
298 data->pwm_auto_pwm[0][1] = vt1211_read8(data,
299 VT1211_REG_PWM_AUTO_PWM(0, 1));
300 data->pwm_auto_pwm[0][2] = vt1211_read8(data,
301 VT1211_REG_PWM_AUTO_PWM(0, 2));
302 data->pwm_auto_pwm[1][1] = vt1211_read8(data,
303 VT1211_REG_PWM_AUTO_PWM(1, 1));
304 data->pwm_auto_pwm[1][2] = vt1211_read8(data,
305 VT1211_REG_PWM_AUTO_PWM(1, 2));
306 for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
307 data->pwm_auto_temp[ix] = vt1211_read8(data,
308 VT1211_REG_PWM_AUTO_TEMP(ix));
309 }
310
311 /* alarm registers */
312 data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
313 vt1211_read8(data, VT1211_REG_ALARM1);
314
315 data->last_updated = jiffies;
316 data->valid = true;
317 }
318
319 mutex_unlock(&data->update_lock);
320
321 return data;
322 }
323
324 /* ---------------------------------------------------------------------
325 * Voltage sysfs interfaces
326 * ix = [0-5]
327 * --------------------------------------------------------------------- */
328
329 #define SHOW_IN_INPUT 0
330 #define SHOW_SET_IN_MIN 1
331 #define SHOW_SET_IN_MAX 2
332 #define SHOW_IN_ALARM 3
333
show_in(struct device * dev,struct device_attribute * attr,char * buf)334 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
335 char *buf)
336 {
337 struct vt1211_data *data = vt1211_update_device(dev);
338 struct sensor_device_attribute_2 *sensor_attr_2 =
339 to_sensor_dev_attr_2(attr);
340 int ix = sensor_attr_2->index;
341 int fn = sensor_attr_2->nr;
342 int res;
343
344 switch (fn) {
345 case SHOW_IN_INPUT:
346 res = IN_FROM_REG(ix, data->in[ix]);
347 break;
348 case SHOW_SET_IN_MIN:
349 res = IN_FROM_REG(ix, data->in_min[ix]);
350 break;
351 case SHOW_SET_IN_MAX:
352 res = IN_FROM_REG(ix, data->in_max[ix]);
353 break;
354 case SHOW_IN_ALARM:
355 res = (data->alarms >> bitalarmin[ix]) & 1;
356 break;
357 default:
358 res = 0;
359 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
360 }
361
362 return sprintf(buf, "%d\n", res);
363 }
364
set_in(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)365 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
366 const char *buf, size_t count)
367 {
368 struct vt1211_data *data = dev_get_drvdata(dev);
369 struct sensor_device_attribute_2 *sensor_attr_2 =
370 to_sensor_dev_attr_2(attr);
371 int ix = sensor_attr_2->index;
372 int fn = sensor_attr_2->nr;
373 long val;
374 int err;
375
376 err = kstrtol(buf, 10, &val);
377 if (err)
378 return err;
379
380 mutex_lock(&data->update_lock);
381 switch (fn) {
382 case SHOW_SET_IN_MIN:
383 data->in_min[ix] = IN_TO_REG(ix, val);
384 vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
385 break;
386 case SHOW_SET_IN_MAX:
387 data->in_max[ix] = IN_TO_REG(ix, val);
388 vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
389 break;
390 default:
391 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
392 }
393 mutex_unlock(&data->update_lock);
394
395 return count;
396 }
397
398 /* ---------------------------------------------------------------------
399 * Temperature sysfs interfaces
400 * ix = [0-6]
401 * --------------------------------------------------------------------- */
402
403 #define SHOW_TEMP_INPUT 0
404 #define SHOW_SET_TEMP_MAX 1
405 #define SHOW_SET_TEMP_MAX_HYST 2
406 #define SHOW_TEMP_ALARM 3
407
show_temp(struct device * dev,struct device_attribute * attr,char * buf)408 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
409 char *buf)
410 {
411 struct vt1211_data *data = vt1211_update_device(dev);
412 struct sensor_device_attribute_2 *sensor_attr_2 =
413 to_sensor_dev_attr_2(attr);
414 int ix = sensor_attr_2->index;
415 int fn = sensor_attr_2->nr;
416 int res;
417
418 switch (fn) {
419 case SHOW_TEMP_INPUT:
420 res = TEMP_FROM_REG(ix, data->temp[ix]);
421 break;
422 case SHOW_SET_TEMP_MAX:
423 res = TEMP_FROM_REG(ix, data->temp_max[ix]);
424 break;
425 case SHOW_SET_TEMP_MAX_HYST:
426 res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
427 break;
428 case SHOW_TEMP_ALARM:
429 res = (data->alarms >> bitalarmtemp[ix]) & 1;
430 break;
431 default:
432 res = 0;
433 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
434 }
435
436 return sprintf(buf, "%d\n", res);
437 }
438
set_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)439 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
440 const char *buf, size_t count)
441 {
442 struct vt1211_data *data = dev_get_drvdata(dev);
443 struct sensor_device_attribute_2 *sensor_attr_2 =
444 to_sensor_dev_attr_2(attr);
445 int ix = sensor_attr_2->index;
446 int fn = sensor_attr_2->nr;
447 long val;
448 int err;
449
450 err = kstrtol(buf, 10, &val);
451 if (err)
452 return err;
453
454 mutex_lock(&data->update_lock);
455 switch (fn) {
456 case SHOW_SET_TEMP_MAX:
457 data->temp_max[ix] = TEMP_TO_REG(ix, val);
458 vt1211_write8(data, regtempmax[ix],
459 data->temp_max[ix]);
460 break;
461 case SHOW_SET_TEMP_MAX_HYST:
462 data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
463 vt1211_write8(data, regtemphyst[ix],
464 data->temp_hyst[ix]);
465 break;
466 default:
467 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
468 }
469 mutex_unlock(&data->update_lock);
470
471 return count;
472 }
473
474 /* ---------------------------------------------------------------------
475 * Fan sysfs interfaces
476 * ix = [0-1]
477 * --------------------------------------------------------------------- */
478
479 #define SHOW_FAN_INPUT 0
480 #define SHOW_SET_FAN_MIN 1
481 #define SHOW_SET_FAN_DIV 2
482 #define SHOW_FAN_ALARM 3
483
show_fan(struct device * dev,struct device_attribute * attr,char * buf)484 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
485 char *buf)
486 {
487 struct vt1211_data *data = vt1211_update_device(dev);
488 struct sensor_device_attribute_2 *sensor_attr_2 =
489 to_sensor_dev_attr_2(attr);
490 int ix = sensor_attr_2->index;
491 int fn = sensor_attr_2->nr;
492 int res;
493
494 switch (fn) {
495 case SHOW_FAN_INPUT:
496 res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
497 break;
498 case SHOW_SET_FAN_MIN:
499 res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
500 break;
501 case SHOW_SET_FAN_DIV:
502 res = DIV_FROM_REG(data->fan_div[ix]);
503 break;
504 case SHOW_FAN_ALARM:
505 res = (data->alarms >> bitalarmfan[ix]) & 1;
506 break;
507 default:
508 res = 0;
509 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
510 }
511
512 return sprintf(buf, "%d\n", res);
513 }
514
set_fan(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)515 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
516 const char *buf, size_t count)
517 {
518 struct vt1211_data *data = dev_get_drvdata(dev);
519 struct sensor_device_attribute_2 *sensor_attr_2 =
520 to_sensor_dev_attr_2(attr);
521 int ix = sensor_attr_2->index;
522 int fn = sensor_attr_2->nr;
523 int reg;
524 unsigned long val;
525 int err;
526
527 err = kstrtoul(buf, 10, &val);
528 if (err)
529 return err;
530
531 mutex_lock(&data->update_lock);
532
533 /* sync the data cache */
534 reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
535 data->fan_div[0] = (reg >> 4) & 3;
536 data->fan_div[1] = (reg >> 6) & 3;
537 data->fan_ctl = reg & 0xf;
538
539 switch (fn) {
540 case SHOW_SET_FAN_MIN:
541 data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
542 vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
543 data->fan_min[ix]);
544 break;
545 case SHOW_SET_FAN_DIV:
546 switch (val) {
547 case 1:
548 data->fan_div[ix] = 0;
549 break;
550 case 2:
551 data->fan_div[ix] = 1;
552 break;
553 case 4:
554 data->fan_div[ix] = 2;
555 break;
556 case 8:
557 data->fan_div[ix] = 3;
558 break;
559 default:
560 count = -EINVAL;
561 dev_warn(dev,
562 "fan div value %ld not supported. Choose one of 1, 2, 4, or 8.\n",
563 val);
564 goto EXIT;
565 }
566 vt1211_write8(data, VT1211_REG_FAN_DIV,
567 ((data->fan_div[1] << 6) |
568 (data->fan_div[0] << 4) |
569 data->fan_ctl));
570 break;
571 default:
572 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
573 }
574
575 EXIT:
576 mutex_unlock(&data->update_lock);
577 return count;
578 }
579
580 /* ---------------------------------------------------------------------
581 * PWM sysfs interfaces
582 * ix = [0-1]
583 * --------------------------------------------------------------------- */
584
585 #define SHOW_PWM 0
586 #define SHOW_SET_PWM_ENABLE 1
587 #define SHOW_SET_PWM_FREQ 2
588 #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
589
show_pwm(struct device * dev,struct device_attribute * attr,char * buf)590 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
591 char *buf)
592 {
593 struct vt1211_data *data = vt1211_update_device(dev);
594 struct sensor_device_attribute_2 *sensor_attr_2 =
595 to_sensor_dev_attr_2(attr);
596 int ix = sensor_attr_2->index;
597 int fn = sensor_attr_2->nr;
598 int res;
599
600 switch (fn) {
601 case SHOW_PWM:
602 res = data->pwm[ix];
603 break;
604 case SHOW_SET_PWM_ENABLE:
605 res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
606 break;
607 case SHOW_SET_PWM_FREQ:
608 res = 90000 >> (data->pwm_clk & 7);
609 break;
610 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
611 res = (data->pwm_ctl[ix] & 7) + 1;
612 break;
613 default:
614 res = 0;
615 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
616 }
617
618 return sprintf(buf, "%d\n", res);
619 }
620
set_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)621 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
622 const char *buf, size_t count)
623 {
624 struct vt1211_data *data = dev_get_drvdata(dev);
625 struct sensor_device_attribute_2 *sensor_attr_2 =
626 to_sensor_dev_attr_2(attr);
627 int ix = sensor_attr_2->index;
628 int fn = sensor_attr_2->nr;
629 int tmp, reg;
630 unsigned long val;
631 int err;
632
633 err = kstrtoul(buf, 10, &val);
634 if (err)
635 return err;
636
637 mutex_lock(&data->update_lock);
638
639 switch (fn) {
640 case SHOW_SET_PWM_ENABLE:
641 /* sync the data cache */
642 reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
643 data->fan_div[0] = (reg >> 4) & 3;
644 data->fan_div[1] = (reg >> 6) & 3;
645 data->fan_ctl = reg & 0xf;
646 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
647 data->pwm_ctl[0] = reg & 0xf;
648 data->pwm_ctl[1] = (reg >> 4) & 0xf;
649 switch (val) {
650 case 0:
651 data->pwm_ctl[ix] &= 7;
652 /*
653 * disable SmartGuardian if both PWM outputs are
654 * disabled
655 */
656 if ((data->pwm_ctl[ix ^ 1] & 1) == 0)
657 data->fan_ctl &= 0xe;
658 break;
659 case 2:
660 data->pwm_ctl[ix] |= 8;
661 data->fan_ctl |= 1;
662 break;
663 default:
664 count = -EINVAL;
665 dev_warn(dev,
666 "pwm mode %ld not supported. Choose one of 0 or 2.\n",
667 val);
668 goto EXIT;
669 }
670 vt1211_write8(data, VT1211_REG_PWM_CTL,
671 ((data->pwm_ctl[1] << 4) |
672 data->pwm_ctl[0]));
673 vt1211_write8(data, VT1211_REG_FAN_DIV,
674 ((data->fan_div[1] << 6) |
675 (data->fan_div[0] << 4) |
676 data->fan_ctl));
677 break;
678 case SHOW_SET_PWM_FREQ:
679 val = 135000 / clamp_val(val, 135000 >> 7, 135000);
680 /* calculate tmp = log2(val) */
681 tmp = 0;
682 for (val >>= 1; val > 0; val >>= 1)
683 tmp++;
684 /* sync the data cache */
685 reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
686 data->pwm_clk = (reg & 0xf8) | tmp;
687 vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
688 break;
689 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
690 if (val < 1 || val > 7) {
691 count = -EINVAL;
692 dev_warn(dev,
693 "temp channel %ld not supported. Choose a value between 1 and 7.\n",
694 val);
695 goto EXIT;
696 }
697 if (!ISTEMP(val - 1, data->uch_config)) {
698 count = -EINVAL;
699 dev_warn(dev, "temp channel %ld is not available.\n",
700 val);
701 goto EXIT;
702 }
703 /* sync the data cache */
704 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
705 data->pwm_ctl[0] = reg & 0xf;
706 data->pwm_ctl[1] = (reg >> 4) & 0xf;
707 data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
708 vt1211_write8(data, VT1211_REG_PWM_CTL,
709 ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
710 break;
711 default:
712 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
713 }
714
715 EXIT:
716 mutex_unlock(&data->update_lock);
717 return count;
718 }
719
720 /* ---------------------------------------------------------------------
721 * PWM auto point definitions
722 * ix = [0-1]
723 * ap = [0-3]
724 * --------------------------------------------------------------------- */
725
726 /*
727 * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
728 * Note that there is only a single set of temp auto points that controls both
729 * PWM controllers. We still create 2 sets of sysfs files to make it look
730 * more consistent even though they map to the same registers.
731 *
732 * ix ap : description
733 * -------------------
734 * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0])
735 * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
736 * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
737 * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
738 * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0])
739 * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
740 * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
741 * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
742 */
743
show_pwm_auto_point_temp(struct device * dev,struct device_attribute * attr,char * buf)744 static ssize_t show_pwm_auto_point_temp(struct device *dev,
745 struct device_attribute *attr,
746 char *buf)
747 {
748 struct vt1211_data *data = vt1211_update_device(dev);
749 struct sensor_device_attribute_2 *sensor_attr_2 =
750 to_sensor_dev_attr_2(attr);
751 int ix = sensor_attr_2->index;
752 int ap = sensor_attr_2->nr;
753
754 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
755 data->pwm_auto_temp[ap]));
756 }
757
set_pwm_auto_point_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)758 static ssize_t set_pwm_auto_point_temp(struct device *dev,
759 struct device_attribute *attr,
760 const char *buf, size_t count)
761 {
762 struct vt1211_data *data = dev_get_drvdata(dev);
763 struct sensor_device_attribute_2 *sensor_attr_2 =
764 to_sensor_dev_attr_2(attr);
765 int ix = sensor_attr_2->index;
766 int ap = sensor_attr_2->nr;
767 int reg;
768 long val;
769 int err;
770
771 err = kstrtol(buf, 10, &val);
772 if (err)
773 return err;
774
775
776 mutex_lock(&data->update_lock);
777
778 /* sync the data cache */
779 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
780 data->pwm_ctl[0] = reg & 0xf;
781 data->pwm_ctl[1] = (reg >> 4) & 0xf;
782
783 data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
784 vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
785 data->pwm_auto_temp[ap]);
786 mutex_unlock(&data->update_lock);
787
788 return count;
789 }
790
791 /*
792 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
793 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
794 * be changed.
795 *
796 * ix ap : description
797 * -------------------
798 * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0)
799 * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1])
800 * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
801 * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255)
802 * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0)
803 * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1])
804 * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
805 * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255)
806 */
807
show_pwm_auto_point_pwm(struct device * dev,struct device_attribute * attr,char * buf)808 static ssize_t show_pwm_auto_point_pwm(struct device *dev,
809 struct device_attribute *attr,
810 char *buf)
811 {
812 struct vt1211_data *data = vt1211_update_device(dev);
813 struct sensor_device_attribute_2 *sensor_attr_2 =
814 to_sensor_dev_attr_2(attr);
815 int ix = sensor_attr_2->index;
816 int ap = sensor_attr_2->nr;
817
818 return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
819 }
820
set_pwm_auto_point_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)821 static ssize_t set_pwm_auto_point_pwm(struct device *dev,
822 struct device_attribute *attr,
823 const char *buf, size_t count)
824 {
825 struct vt1211_data *data = dev_get_drvdata(dev);
826 struct sensor_device_attribute_2 *sensor_attr_2 =
827 to_sensor_dev_attr_2(attr);
828 int ix = sensor_attr_2->index;
829 int ap = sensor_attr_2->nr;
830 unsigned long val;
831 int err;
832
833 err = kstrtoul(buf, 10, &val);
834 if (err)
835 return err;
836
837 mutex_lock(&data->update_lock);
838 data->pwm_auto_pwm[ix][ap] = clamp_val(val, 0, 255);
839 vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
840 data->pwm_auto_pwm[ix][ap]);
841 mutex_unlock(&data->update_lock);
842
843 return count;
844 }
845
846 /* ---------------------------------------------------------------------
847 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
848 * --------------------------------------------------------------------- */
849
show_vrm(struct device * dev,struct device_attribute * attr,char * buf)850 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
851 char *buf)
852 {
853 struct vt1211_data *data = dev_get_drvdata(dev);
854
855 return sprintf(buf, "%d\n", data->vrm);
856 }
857
set_vrm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)858 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
859 const char *buf, size_t count)
860 {
861 struct vt1211_data *data = dev_get_drvdata(dev);
862 unsigned long val;
863 int err;
864
865 err = kstrtoul(buf, 10, &val);
866 if (err)
867 return err;
868
869 if (val > 255)
870 return -EINVAL;
871
872 data->vrm = val;
873
874 return count;
875 }
876
show_vid(struct device * dev,struct device_attribute * attr,char * buf)877 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
878 char *buf)
879 {
880 struct vt1211_data *data = dev_get_drvdata(dev);
881
882 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
883 }
884
show_name(struct device * dev,struct device_attribute * attr,char * buf)885 static ssize_t show_name(struct device *dev,
886 struct device_attribute *attr, char *buf)
887 {
888 struct vt1211_data *data = dev_get_drvdata(dev);
889
890 return sprintf(buf, "%s\n", data->name);
891 }
892
show_alarms(struct device * dev,struct device_attribute * attr,char * buf)893 static ssize_t show_alarms(struct device *dev,
894 struct device_attribute *attr, char *buf)
895 {
896 struct vt1211_data *data = vt1211_update_device(dev);
897
898 return sprintf(buf, "%d\n", data->alarms);
899 }
900
901 /* ---------------------------------------------------------------------
902 * Device attribute structs
903 * --------------------------------------------------------------------- */
904
905 #define SENSOR_ATTR_IN(ix) \
906 { SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
907 show_in, NULL, SHOW_IN_INPUT, ix), \
908 SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
909 show_in, set_in, SHOW_SET_IN_MIN, ix), \
910 SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
911 show_in, set_in, SHOW_SET_IN_MAX, ix), \
912 SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
913 show_in, NULL, SHOW_IN_ALARM, ix) \
914 }
915
916 static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = {
917 SENSOR_ATTR_IN(0),
918 SENSOR_ATTR_IN(1),
919 SENSOR_ATTR_IN(2),
920 SENSOR_ATTR_IN(3),
921 SENSOR_ATTR_IN(4),
922 SENSOR_ATTR_IN(5)
923 };
924
925 #define IN_UNIT_ATTRS(X) \
926 { &vt1211_sysfs_in[X][0].dev_attr.attr, \
927 &vt1211_sysfs_in[X][1].dev_attr.attr, \
928 &vt1211_sysfs_in[X][2].dev_attr.attr, \
929 &vt1211_sysfs_in[X][3].dev_attr.attr, \
930 NULL \
931 }
932
933 static struct attribute *vt1211_in_attr[][5] = {
934 IN_UNIT_ATTRS(0),
935 IN_UNIT_ATTRS(1),
936 IN_UNIT_ATTRS(2),
937 IN_UNIT_ATTRS(3),
938 IN_UNIT_ATTRS(4),
939 IN_UNIT_ATTRS(5)
940 };
941
942 static const struct attribute_group vt1211_in_attr_group[] = {
943 { .attrs = vt1211_in_attr[0] },
944 { .attrs = vt1211_in_attr[1] },
945 { .attrs = vt1211_in_attr[2] },
946 { .attrs = vt1211_in_attr[3] },
947 { .attrs = vt1211_in_attr[4] },
948 { .attrs = vt1211_in_attr[5] }
949 };
950
951 #define SENSOR_ATTR_TEMP(ix) \
952 { SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
953 show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
954 SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
955 show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
956 SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
957 show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
958 SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
959 show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \
960 }
961
962 static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = {
963 SENSOR_ATTR_TEMP(1),
964 SENSOR_ATTR_TEMP(2),
965 SENSOR_ATTR_TEMP(3),
966 SENSOR_ATTR_TEMP(4),
967 SENSOR_ATTR_TEMP(5),
968 SENSOR_ATTR_TEMP(6),
969 SENSOR_ATTR_TEMP(7),
970 };
971
972 #define TEMP_UNIT_ATTRS(X) \
973 { &vt1211_sysfs_temp[X][0].dev_attr.attr, \
974 &vt1211_sysfs_temp[X][1].dev_attr.attr, \
975 &vt1211_sysfs_temp[X][2].dev_attr.attr, \
976 &vt1211_sysfs_temp[X][3].dev_attr.attr, \
977 NULL \
978 }
979
980 static struct attribute *vt1211_temp_attr[][5] = {
981 TEMP_UNIT_ATTRS(0),
982 TEMP_UNIT_ATTRS(1),
983 TEMP_UNIT_ATTRS(2),
984 TEMP_UNIT_ATTRS(3),
985 TEMP_UNIT_ATTRS(4),
986 TEMP_UNIT_ATTRS(5),
987 TEMP_UNIT_ATTRS(6)
988 };
989
990 static const struct attribute_group vt1211_temp_attr_group[] = {
991 { .attrs = vt1211_temp_attr[0] },
992 { .attrs = vt1211_temp_attr[1] },
993 { .attrs = vt1211_temp_attr[2] },
994 { .attrs = vt1211_temp_attr[3] },
995 { .attrs = vt1211_temp_attr[4] },
996 { .attrs = vt1211_temp_attr[5] },
997 { .attrs = vt1211_temp_attr[6] }
998 };
999
1000 #define SENSOR_ATTR_FAN(ix) \
1001 SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
1002 show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
1003 SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1004 show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
1005 SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
1006 show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
1007 SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1008 show_fan, NULL, SHOW_FAN_ALARM, ix-1)
1009
1010 #define SENSOR_ATTR_PWM(ix) \
1011 SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
1012 show_pwm, NULL, SHOW_PWM, ix-1), \
1013 SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
1014 show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
1015 SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
1016 show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
1017
1018 #define SENSOR_ATTR_PWM_FREQ(ix) \
1019 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
1020 show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
1021
1022 #define SENSOR_ATTR_PWM_FREQ_RO(ix) \
1023 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1024 show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
1025
1026 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1027 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1028 show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1029 ap-1, ix-1)
1030
1031 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1032 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1033 show_pwm_auto_point_temp, NULL, \
1034 ap-1, ix-1)
1035
1036 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1037 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1038 show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1039 ap-1, ix-1)
1040
1041 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1042 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1043 show_pwm_auto_point_pwm, NULL, \
1044 ap-1, ix-1)
1045
1046 static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1047 SENSOR_ATTR_FAN(1),
1048 SENSOR_ATTR_FAN(2),
1049 SENSOR_ATTR_PWM(1),
1050 SENSOR_ATTR_PWM(2),
1051 SENSOR_ATTR_PWM_FREQ(1),
1052 SENSOR_ATTR_PWM_FREQ_RO(2),
1053 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1054 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1055 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1056 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1057 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1058 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1059 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1060 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1061 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1062 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1063 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1064 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1065 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1066 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1067 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1068 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1069 };
1070
1071 static struct device_attribute vt1211_sysfs_misc[] = {
1072 __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1073 __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1074 __ATTR(name, S_IRUGO, show_name, NULL),
1075 __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1076 };
1077
1078 /* ---------------------------------------------------------------------
1079 * Device registration and initialization
1080 * --------------------------------------------------------------------- */
1081
vt1211_init_device(struct vt1211_data * data)1082 static void vt1211_init_device(struct vt1211_data *data)
1083 {
1084 /* set VRM */
1085 data->vrm = vid_which_vrm();
1086
1087 /* Read (and initialize) UCH config */
1088 data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1089 if (uch_config > -1) {
1090 data->uch_config = (data->uch_config & 0x83) |
1091 (uch_config << 2);
1092 vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1093 }
1094
1095 /*
1096 * Initialize the interrupt mode (if request at module load time).
1097 * The VT1211 implements 3 different modes for clearing interrupts:
1098 * 0: Clear INT when status register is read. Regenerate INT as long
1099 * as temp stays above hysteresis limit.
1100 * 1: Clear INT when status register is read. DON'T regenerate INT
1101 * until temp falls below hysteresis limit and exceeds hot limit
1102 * again.
1103 * 2: Clear INT when temp falls below max limit.
1104 *
1105 * The driver only allows to force mode 0 since that's the only one
1106 * that makes sense for 'sensors'
1107 */
1108 if (int_mode == 0) {
1109 vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1110 vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1111 }
1112
1113 /* Fill in some hard wired values into our data struct */
1114 data->pwm_auto_pwm[0][3] = 255;
1115 data->pwm_auto_pwm[1][3] = 255;
1116 }
1117
vt1211_remove_sysfs(struct platform_device * pdev)1118 static void vt1211_remove_sysfs(struct platform_device *pdev)
1119 {
1120 struct device *dev = &pdev->dev;
1121 int i;
1122
1123 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++)
1124 sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
1125
1126 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
1127 sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
1128
1129 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1130 device_remove_file(dev,
1131 &vt1211_sysfs_fan_pwm[i].dev_attr);
1132 }
1133 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++)
1134 device_remove_file(dev, &vt1211_sysfs_misc[i]);
1135 }
1136
vt1211_probe(struct platform_device * pdev)1137 static int vt1211_probe(struct platform_device *pdev)
1138 {
1139 struct device *dev = &pdev->dev;
1140 struct vt1211_data *data;
1141 struct resource *res;
1142 int i, err;
1143
1144 data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
1145 if (!data)
1146 return -ENOMEM;
1147
1148 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1149 if (!devm_request_region(dev, res->start, resource_size(res),
1150 DRVNAME)) {
1151 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1152 (unsigned long)res->start, (unsigned long)res->end);
1153 return -EBUSY;
1154 }
1155 data->addr = res->start;
1156 data->name = DRVNAME;
1157 mutex_init(&data->update_lock);
1158
1159 platform_set_drvdata(pdev, data);
1160
1161 /* Initialize the VT1211 chip */
1162 vt1211_init_device(data);
1163
1164 /* Create sysfs interface files */
1165 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) {
1166 if (ISVOLT(i, data->uch_config)) {
1167 err = sysfs_create_group(&dev->kobj,
1168 &vt1211_in_attr_group[i]);
1169 if (err)
1170 goto EXIT_DEV_REMOVE;
1171 }
1172 }
1173 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
1174 if (ISTEMP(i, data->uch_config)) {
1175 err = sysfs_create_group(&dev->kobj,
1176 &vt1211_temp_attr_group[i]);
1177 if (err)
1178 goto EXIT_DEV_REMOVE;
1179 }
1180 }
1181 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1182 err = device_create_file(dev,
1183 &vt1211_sysfs_fan_pwm[i].dev_attr);
1184 if (err)
1185 goto EXIT_DEV_REMOVE;
1186 }
1187 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1188 err = device_create_file(dev,
1189 &vt1211_sysfs_misc[i]);
1190 if (err)
1191 goto EXIT_DEV_REMOVE;
1192 }
1193
1194 /* Register device */
1195 data->hwmon_dev = hwmon_device_register(dev);
1196 if (IS_ERR(data->hwmon_dev)) {
1197 err = PTR_ERR(data->hwmon_dev);
1198 dev_err(dev, "Class registration failed (%d)\n", err);
1199 goto EXIT_DEV_REMOVE_SILENT;
1200 }
1201
1202 return 0;
1203
1204 EXIT_DEV_REMOVE:
1205 dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1206 EXIT_DEV_REMOVE_SILENT:
1207 vt1211_remove_sysfs(pdev);
1208 return err;
1209 }
1210
vt1211_remove(struct platform_device * pdev)1211 static int vt1211_remove(struct platform_device *pdev)
1212 {
1213 struct vt1211_data *data = platform_get_drvdata(pdev);
1214
1215 hwmon_device_unregister(data->hwmon_dev);
1216 vt1211_remove_sysfs(pdev);
1217
1218 return 0;
1219 }
1220
1221 static struct platform_driver vt1211_driver = {
1222 .driver = {
1223 .name = DRVNAME,
1224 },
1225 .probe = vt1211_probe,
1226 .remove = vt1211_remove,
1227 };
1228
vt1211_device_add(unsigned short address)1229 static int __init vt1211_device_add(unsigned short address)
1230 {
1231 struct resource res = {
1232 .start = address,
1233 .end = address + 0x7f,
1234 .flags = IORESOURCE_IO,
1235 };
1236 int err;
1237
1238 pdev = platform_device_alloc(DRVNAME, address);
1239 if (!pdev) {
1240 err = -ENOMEM;
1241 pr_err("Device allocation failed (%d)\n", err);
1242 goto EXIT;
1243 }
1244
1245 res.name = pdev->name;
1246 err = acpi_check_resource_conflict(&res);
1247 if (err)
1248 goto EXIT_DEV_PUT;
1249
1250 err = platform_device_add_resources(pdev, &res, 1);
1251 if (err) {
1252 pr_err("Device resource addition failed (%d)\n", err);
1253 goto EXIT_DEV_PUT;
1254 }
1255
1256 err = platform_device_add(pdev);
1257 if (err) {
1258 pr_err("Device addition failed (%d)\n", err);
1259 goto EXIT_DEV_PUT;
1260 }
1261
1262 return 0;
1263
1264 EXIT_DEV_PUT:
1265 platform_device_put(pdev);
1266 EXIT:
1267 return err;
1268 }
1269
vt1211_find(int sio_cip,unsigned short * address)1270 static int __init vt1211_find(int sio_cip, unsigned short *address)
1271 {
1272 int err;
1273 int devid;
1274
1275 err = superio_enter(sio_cip);
1276 if (err)
1277 return err;
1278
1279 err = -ENODEV;
1280 devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1281 if (devid != SIO_VT1211_ID)
1282 goto EXIT;
1283
1284 superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1285
1286 if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1287 pr_warn("HW monitor is disabled, skipping\n");
1288 goto EXIT;
1289 }
1290
1291 *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1292 (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1293 if (*address == 0) {
1294 pr_warn("Base address is not set, skipping\n");
1295 goto EXIT;
1296 }
1297
1298 err = 0;
1299 pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
1300 *address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
1301
1302 EXIT:
1303 superio_exit(sio_cip);
1304 return err;
1305 }
1306
vt1211_init(void)1307 static int __init vt1211_init(void)
1308 {
1309 int err;
1310 unsigned short address = 0;
1311
1312 err = vt1211_find(SIO_REG_CIP1, &address);
1313 if (err) {
1314 err = vt1211_find(SIO_REG_CIP2, &address);
1315 if (err)
1316 goto EXIT;
1317 }
1318
1319 if ((uch_config < -1) || (uch_config > 31)) {
1320 err = -EINVAL;
1321 pr_warn("Invalid UCH configuration %d. Choose a value between 0 and 31.\n",
1322 uch_config);
1323 goto EXIT;
1324 }
1325
1326 if ((int_mode < -1) || (int_mode > 0)) {
1327 err = -EINVAL;
1328 pr_warn("Invalid interrupt mode %d. Only mode 0 is supported.\n",
1329 int_mode);
1330 goto EXIT;
1331 }
1332
1333 err = platform_driver_register(&vt1211_driver);
1334 if (err)
1335 goto EXIT;
1336
1337 /* Sets global pdev as a side effect */
1338 err = vt1211_device_add(address);
1339 if (err)
1340 goto EXIT_DRV_UNREGISTER;
1341
1342 return 0;
1343
1344 EXIT_DRV_UNREGISTER:
1345 platform_driver_unregister(&vt1211_driver);
1346 EXIT:
1347 return err;
1348 }
1349
vt1211_exit(void)1350 static void __exit vt1211_exit(void)
1351 {
1352 platform_device_unregister(pdev);
1353 platform_driver_unregister(&vt1211_driver);
1354 }
1355
1356 MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
1357 MODULE_DESCRIPTION("VT1211 sensors");
1358 MODULE_LICENSE("GPL");
1359
1360 module_init(vt1211_init);
1361 module_exit(vt1211_exit);
1362
