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 char valid; /* !=0 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_outb(int sio_cip,int reg,int val)198 static inline void superio_outb(int sio_cip, int reg, int val)
199 {
200 outb(reg, sio_cip);
201 outb(val, sio_cip + 1);
202 }
203
superio_inb(int sio_cip,int reg)204 static inline int superio_inb(int sio_cip, int reg)
205 {
206 outb(reg, sio_cip);
207 return inb(sio_cip + 1);
208 }
209
superio_select(int sio_cip,int ldn)210 static inline void superio_select(int sio_cip, int ldn)
211 {
212 outb(SIO_VT1211_LDN, sio_cip);
213 outb(ldn, sio_cip + 1);
214 }
215
superio_enter(int sio_cip)216 static inline int superio_enter(int sio_cip)
217 {
218 if (!request_muxed_region(sio_cip, 2, DRVNAME))
219 return -EBUSY;
220
221 outb(0x87, sio_cip);
222 outb(0x87, sio_cip);
223
224 return 0;
225 }
226
superio_exit(int sio_cip)227 static inline void superio_exit(int sio_cip)
228 {
229 outb(0xaa, sio_cip);
230 release_region(sio_cip, 2);
231 }
232
233 /* ---------------------------------------------------------------------
234 * Device I/O access
235 * --------------------------------------------------------------------- */
236
vt1211_read8(struct vt1211_data * data,u8 reg)237 static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
238 {
239 return inb(data->addr + reg);
240 }
241
vt1211_write8(struct vt1211_data * data,u8 reg,u8 val)242 static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
243 {
244 outb(val, data->addr + reg);
245 }
246
vt1211_update_device(struct device * dev)247 static struct vt1211_data *vt1211_update_device(struct device *dev)
248 {
249 struct vt1211_data *data = dev_get_drvdata(dev);
250 int ix, val;
251
252 mutex_lock(&data->update_lock);
253
254 /* registers cache is refreshed after 1 second */
255 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
256 /* read VID */
257 data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
258
259 /* voltage (in) registers */
260 for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
261 if (ISVOLT(ix, data->uch_config)) {
262 data->in[ix] = vt1211_read8(data,
263 VT1211_REG_IN(ix));
264 data->in_min[ix] = vt1211_read8(data,
265 VT1211_REG_IN_MIN(ix));
266 data->in_max[ix] = vt1211_read8(data,
267 VT1211_REG_IN_MAX(ix));
268 }
269 }
270
271 /* temp registers */
272 for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
273 if (ISTEMP(ix, data->uch_config)) {
274 data->temp[ix] = vt1211_read8(data,
275 regtemp[ix]);
276 data->temp_max[ix] = vt1211_read8(data,
277 regtempmax[ix]);
278 data->temp_hyst[ix] = vt1211_read8(data,
279 regtemphyst[ix]);
280 }
281 }
282
283 /* fan & pwm registers */
284 for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
285 data->fan[ix] = vt1211_read8(data,
286 VT1211_REG_FAN(ix));
287 data->fan_min[ix] = vt1211_read8(data,
288 VT1211_REG_FAN_MIN(ix));
289 data->pwm[ix] = vt1211_read8(data,
290 VT1211_REG_PWM(ix));
291 }
292 val = vt1211_read8(data, VT1211_REG_FAN_DIV);
293 data->fan_div[0] = (val >> 4) & 3;
294 data->fan_div[1] = (val >> 6) & 3;
295 data->fan_ctl = val & 0xf;
296
297 val = vt1211_read8(data, VT1211_REG_PWM_CTL);
298 data->pwm_ctl[0] = val & 0xf;
299 data->pwm_ctl[1] = (val >> 4) & 0xf;
300
301 data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
302
303 /* pwm & temp auto point registers */
304 data->pwm_auto_pwm[0][1] = vt1211_read8(data,
305 VT1211_REG_PWM_AUTO_PWM(0, 1));
306 data->pwm_auto_pwm[0][2] = vt1211_read8(data,
307 VT1211_REG_PWM_AUTO_PWM(0, 2));
308 data->pwm_auto_pwm[1][1] = vt1211_read8(data,
309 VT1211_REG_PWM_AUTO_PWM(1, 1));
310 data->pwm_auto_pwm[1][2] = vt1211_read8(data,
311 VT1211_REG_PWM_AUTO_PWM(1, 2));
312 for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
313 data->pwm_auto_temp[ix] = vt1211_read8(data,
314 VT1211_REG_PWM_AUTO_TEMP(ix));
315 }
316
317 /* alarm registers */
318 data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
319 vt1211_read8(data, VT1211_REG_ALARM1);
320
321 data->last_updated = jiffies;
322 data->valid = 1;
323 }
324
325 mutex_unlock(&data->update_lock);
326
327 return data;
328 }
329
330 /* ---------------------------------------------------------------------
331 * Voltage sysfs interfaces
332 * ix = [0-5]
333 * --------------------------------------------------------------------- */
334
335 #define SHOW_IN_INPUT 0
336 #define SHOW_SET_IN_MIN 1
337 #define SHOW_SET_IN_MAX 2
338 #define SHOW_IN_ALARM 3
339
show_in(struct device * dev,struct device_attribute * attr,char * buf)340 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
341 char *buf)
342 {
343 struct vt1211_data *data = vt1211_update_device(dev);
344 struct sensor_device_attribute_2 *sensor_attr_2 =
345 to_sensor_dev_attr_2(attr);
346 int ix = sensor_attr_2->index;
347 int fn = sensor_attr_2->nr;
348 int res;
349
350 switch (fn) {
351 case SHOW_IN_INPUT:
352 res = IN_FROM_REG(ix, data->in[ix]);
353 break;
354 case SHOW_SET_IN_MIN:
355 res = IN_FROM_REG(ix, data->in_min[ix]);
356 break;
357 case SHOW_SET_IN_MAX:
358 res = IN_FROM_REG(ix, data->in_max[ix]);
359 break;
360 case SHOW_IN_ALARM:
361 res = (data->alarms >> bitalarmin[ix]) & 1;
362 break;
363 default:
364 res = 0;
365 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
366 }
367
368 return sprintf(buf, "%d\n", res);
369 }
370
set_in(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)371 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
372 const char *buf, size_t count)
373 {
374 struct vt1211_data *data = dev_get_drvdata(dev);
375 struct sensor_device_attribute_2 *sensor_attr_2 =
376 to_sensor_dev_attr_2(attr);
377 int ix = sensor_attr_2->index;
378 int fn = sensor_attr_2->nr;
379 long val;
380 int err;
381
382 err = kstrtol(buf, 10, &val);
383 if (err)
384 return err;
385
386 mutex_lock(&data->update_lock);
387 switch (fn) {
388 case SHOW_SET_IN_MIN:
389 data->in_min[ix] = IN_TO_REG(ix, val);
390 vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
391 break;
392 case SHOW_SET_IN_MAX:
393 data->in_max[ix] = IN_TO_REG(ix, val);
394 vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
395 break;
396 default:
397 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
398 }
399 mutex_unlock(&data->update_lock);
400
401 return count;
402 }
403
404 /* ---------------------------------------------------------------------
405 * Temperature sysfs interfaces
406 * ix = [0-6]
407 * --------------------------------------------------------------------- */
408
409 #define SHOW_TEMP_INPUT 0
410 #define SHOW_SET_TEMP_MAX 1
411 #define SHOW_SET_TEMP_MAX_HYST 2
412 #define SHOW_TEMP_ALARM 3
413
show_temp(struct device * dev,struct device_attribute * attr,char * buf)414 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
415 char *buf)
416 {
417 struct vt1211_data *data = vt1211_update_device(dev);
418 struct sensor_device_attribute_2 *sensor_attr_2 =
419 to_sensor_dev_attr_2(attr);
420 int ix = sensor_attr_2->index;
421 int fn = sensor_attr_2->nr;
422 int res;
423
424 switch (fn) {
425 case SHOW_TEMP_INPUT:
426 res = TEMP_FROM_REG(ix, data->temp[ix]);
427 break;
428 case SHOW_SET_TEMP_MAX:
429 res = TEMP_FROM_REG(ix, data->temp_max[ix]);
430 break;
431 case SHOW_SET_TEMP_MAX_HYST:
432 res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
433 break;
434 case SHOW_TEMP_ALARM:
435 res = (data->alarms >> bitalarmtemp[ix]) & 1;
436 break;
437 default:
438 res = 0;
439 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
440 }
441
442 return sprintf(buf, "%d\n", res);
443 }
444
set_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)445 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
446 const char *buf, size_t count)
447 {
448 struct vt1211_data *data = dev_get_drvdata(dev);
449 struct sensor_device_attribute_2 *sensor_attr_2 =
450 to_sensor_dev_attr_2(attr);
451 int ix = sensor_attr_2->index;
452 int fn = sensor_attr_2->nr;
453 long val;
454 int err;
455
456 err = kstrtol(buf, 10, &val);
457 if (err)
458 return err;
459
460 mutex_lock(&data->update_lock);
461 switch (fn) {
462 case SHOW_SET_TEMP_MAX:
463 data->temp_max[ix] = TEMP_TO_REG(ix, val);
464 vt1211_write8(data, regtempmax[ix],
465 data->temp_max[ix]);
466 break;
467 case SHOW_SET_TEMP_MAX_HYST:
468 data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
469 vt1211_write8(data, regtemphyst[ix],
470 data->temp_hyst[ix]);
471 break;
472 default:
473 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
474 }
475 mutex_unlock(&data->update_lock);
476
477 return count;
478 }
479
480 /* ---------------------------------------------------------------------
481 * Fan sysfs interfaces
482 * ix = [0-1]
483 * --------------------------------------------------------------------- */
484
485 #define SHOW_FAN_INPUT 0
486 #define SHOW_SET_FAN_MIN 1
487 #define SHOW_SET_FAN_DIV 2
488 #define SHOW_FAN_ALARM 3
489
show_fan(struct device * dev,struct device_attribute * attr,char * buf)490 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
491 char *buf)
492 {
493 struct vt1211_data *data = vt1211_update_device(dev);
494 struct sensor_device_attribute_2 *sensor_attr_2 =
495 to_sensor_dev_attr_2(attr);
496 int ix = sensor_attr_2->index;
497 int fn = sensor_attr_2->nr;
498 int res;
499
500 switch (fn) {
501 case SHOW_FAN_INPUT:
502 res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
503 break;
504 case SHOW_SET_FAN_MIN:
505 res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
506 break;
507 case SHOW_SET_FAN_DIV:
508 res = DIV_FROM_REG(data->fan_div[ix]);
509 break;
510 case SHOW_FAN_ALARM:
511 res = (data->alarms >> bitalarmfan[ix]) & 1;
512 break;
513 default:
514 res = 0;
515 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
516 }
517
518 return sprintf(buf, "%d\n", res);
519 }
520
set_fan(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)521 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
522 const char *buf, size_t count)
523 {
524 struct vt1211_data *data = dev_get_drvdata(dev);
525 struct sensor_device_attribute_2 *sensor_attr_2 =
526 to_sensor_dev_attr_2(attr);
527 int ix = sensor_attr_2->index;
528 int fn = sensor_attr_2->nr;
529 int reg;
530 unsigned long val;
531 int err;
532
533 err = kstrtoul(buf, 10, &val);
534 if (err)
535 return err;
536
537 mutex_lock(&data->update_lock);
538
539 /* sync the data cache */
540 reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
541 data->fan_div[0] = (reg >> 4) & 3;
542 data->fan_div[1] = (reg >> 6) & 3;
543 data->fan_ctl = reg & 0xf;
544
545 switch (fn) {
546 case SHOW_SET_FAN_MIN:
547 data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
548 vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
549 data->fan_min[ix]);
550 break;
551 case SHOW_SET_FAN_DIV:
552 switch (val) {
553 case 1:
554 data->fan_div[ix] = 0;
555 break;
556 case 2:
557 data->fan_div[ix] = 1;
558 break;
559 case 4:
560 data->fan_div[ix] = 2;
561 break;
562 case 8:
563 data->fan_div[ix] = 3;
564 break;
565 default:
566 count = -EINVAL;
567 dev_warn(dev,
568 "fan div value %ld not supported. Choose one of 1, 2, 4, or 8.\n",
569 val);
570 goto EXIT;
571 }
572 vt1211_write8(data, VT1211_REG_FAN_DIV,
573 ((data->fan_div[1] << 6) |
574 (data->fan_div[0] << 4) |
575 data->fan_ctl));
576 break;
577 default:
578 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
579 }
580
581 EXIT:
582 mutex_unlock(&data->update_lock);
583 return count;
584 }
585
586 /* ---------------------------------------------------------------------
587 * PWM sysfs interfaces
588 * ix = [0-1]
589 * --------------------------------------------------------------------- */
590
591 #define SHOW_PWM 0
592 #define SHOW_SET_PWM_ENABLE 1
593 #define SHOW_SET_PWM_FREQ 2
594 #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
595
show_pwm(struct device * dev,struct device_attribute * attr,char * buf)596 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
597 char *buf)
598 {
599 struct vt1211_data *data = vt1211_update_device(dev);
600 struct sensor_device_attribute_2 *sensor_attr_2 =
601 to_sensor_dev_attr_2(attr);
602 int ix = sensor_attr_2->index;
603 int fn = sensor_attr_2->nr;
604 int res;
605
606 switch (fn) {
607 case SHOW_PWM:
608 res = data->pwm[ix];
609 break;
610 case SHOW_SET_PWM_ENABLE:
611 res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
612 break;
613 case SHOW_SET_PWM_FREQ:
614 res = 90000 >> (data->pwm_clk & 7);
615 break;
616 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
617 res = (data->pwm_ctl[ix] & 7) + 1;
618 break;
619 default:
620 res = 0;
621 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
622 }
623
624 return sprintf(buf, "%d\n", res);
625 }
626
set_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)627 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
628 const char *buf, size_t count)
629 {
630 struct vt1211_data *data = dev_get_drvdata(dev);
631 struct sensor_device_attribute_2 *sensor_attr_2 =
632 to_sensor_dev_attr_2(attr);
633 int ix = sensor_attr_2->index;
634 int fn = sensor_attr_2->nr;
635 int tmp, reg;
636 unsigned long val;
637 int err;
638
639 err = kstrtoul(buf, 10, &val);
640 if (err)
641 return err;
642
643 mutex_lock(&data->update_lock);
644
645 switch (fn) {
646 case SHOW_SET_PWM_ENABLE:
647 /* sync the data cache */
648 reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
649 data->fan_div[0] = (reg >> 4) & 3;
650 data->fan_div[1] = (reg >> 6) & 3;
651 data->fan_ctl = reg & 0xf;
652 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
653 data->pwm_ctl[0] = reg & 0xf;
654 data->pwm_ctl[1] = (reg >> 4) & 0xf;
655 switch (val) {
656 case 0:
657 data->pwm_ctl[ix] &= 7;
658 /*
659 * disable SmartGuardian if both PWM outputs are
660 * disabled
661 */
662 if ((data->pwm_ctl[ix ^ 1] & 1) == 0)
663 data->fan_ctl &= 0xe;
664 break;
665 case 2:
666 data->pwm_ctl[ix] |= 8;
667 data->fan_ctl |= 1;
668 break;
669 default:
670 count = -EINVAL;
671 dev_warn(dev,
672 "pwm mode %ld not supported. Choose one of 0 or 2.\n",
673 val);
674 goto EXIT;
675 }
676 vt1211_write8(data, VT1211_REG_PWM_CTL,
677 ((data->pwm_ctl[1] << 4) |
678 data->pwm_ctl[0]));
679 vt1211_write8(data, VT1211_REG_FAN_DIV,
680 ((data->fan_div[1] << 6) |
681 (data->fan_div[0] << 4) |
682 data->fan_ctl));
683 break;
684 case SHOW_SET_PWM_FREQ:
685 val = 135000 / clamp_val(val, 135000 >> 7, 135000);
686 /* calculate tmp = log2(val) */
687 tmp = 0;
688 for (val >>= 1; val > 0; val >>= 1)
689 tmp++;
690 /* sync the data cache */
691 reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
692 data->pwm_clk = (reg & 0xf8) | tmp;
693 vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
694 break;
695 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
696 if (val < 1 || val > 7) {
697 count = -EINVAL;
698 dev_warn(dev,
699 "temp channel %ld not supported. Choose a value between 1 and 7.\n",
700 val);
701 goto EXIT;
702 }
703 if (!ISTEMP(val - 1, data->uch_config)) {
704 count = -EINVAL;
705 dev_warn(dev, "temp channel %ld is not available.\n",
706 val);
707 goto EXIT;
708 }
709 /* sync the data cache */
710 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
711 data->pwm_ctl[0] = reg & 0xf;
712 data->pwm_ctl[1] = (reg >> 4) & 0xf;
713 data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
714 vt1211_write8(data, VT1211_REG_PWM_CTL,
715 ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
716 break;
717 default:
718 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
719 }
720
721 EXIT:
722 mutex_unlock(&data->update_lock);
723 return count;
724 }
725
726 /* ---------------------------------------------------------------------
727 * PWM auto point definitions
728 * ix = [0-1]
729 * ap = [0-3]
730 * --------------------------------------------------------------------- */
731
732 /*
733 * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
734 * Note that there is only a single set of temp auto points that controls both
735 * PWM controllers. We still create 2 sets of sysfs files to make it look
736 * more consistent even though they map to the same registers.
737 *
738 * ix ap : description
739 * -------------------
740 * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0])
741 * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
742 * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
743 * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
744 * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0])
745 * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
746 * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
747 * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
748 */
749
show_pwm_auto_point_temp(struct device * dev,struct device_attribute * attr,char * buf)750 static ssize_t show_pwm_auto_point_temp(struct device *dev,
751 struct device_attribute *attr,
752 char *buf)
753 {
754 struct vt1211_data *data = vt1211_update_device(dev);
755 struct sensor_device_attribute_2 *sensor_attr_2 =
756 to_sensor_dev_attr_2(attr);
757 int ix = sensor_attr_2->index;
758 int ap = sensor_attr_2->nr;
759
760 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
761 data->pwm_auto_temp[ap]));
762 }
763
set_pwm_auto_point_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)764 static ssize_t set_pwm_auto_point_temp(struct device *dev,
765 struct device_attribute *attr,
766 const char *buf, size_t count)
767 {
768 struct vt1211_data *data = dev_get_drvdata(dev);
769 struct sensor_device_attribute_2 *sensor_attr_2 =
770 to_sensor_dev_attr_2(attr);
771 int ix = sensor_attr_2->index;
772 int ap = sensor_attr_2->nr;
773 int reg;
774 long val;
775 int err;
776
777 err = kstrtol(buf, 10, &val);
778 if (err)
779 return err;
780
781
782 mutex_lock(&data->update_lock);
783
784 /* sync the data cache */
785 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
786 data->pwm_ctl[0] = reg & 0xf;
787 data->pwm_ctl[1] = (reg >> 4) & 0xf;
788
789 data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
790 vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
791 data->pwm_auto_temp[ap]);
792 mutex_unlock(&data->update_lock);
793
794 return count;
795 }
796
797 /*
798 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
799 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
800 * be changed.
801 *
802 * ix ap : description
803 * -------------------
804 * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0)
805 * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1])
806 * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
807 * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255)
808 * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0)
809 * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1])
810 * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
811 * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255)
812 */
813
show_pwm_auto_point_pwm(struct device * dev,struct device_attribute * attr,char * buf)814 static ssize_t show_pwm_auto_point_pwm(struct device *dev,
815 struct device_attribute *attr,
816 char *buf)
817 {
818 struct vt1211_data *data = vt1211_update_device(dev);
819 struct sensor_device_attribute_2 *sensor_attr_2 =
820 to_sensor_dev_attr_2(attr);
821 int ix = sensor_attr_2->index;
822 int ap = sensor_attr_2->nr;
823
824 return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
825 }
826
set_pwm_auto_point_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)827 static ssize_t set_pwm_auto_point_pwm(struct device *dev,
828 struct device_attribute *attr,
829 const char *buf, size_t count)
830 {
831 struct vt1211_data *data = dev_get_drvdata(dev);
832 struct sensor_device_attribute_2 *sensor_attr_2 =
833 to_sensor_dev_attr_2(attr);
834 int ix = sensor_attr_2->index;
835 int ap = sensor_attr_2->nr;
836 unsigned long val;
837 int err;
838
839 err = kstrtoul(buf, 10, &val);
840 if (err)
841 return err;
842
843 mutex_lock(&data->update_lock);
844 data->pwm_auto_pwm[ix][ap] = clamp_val(val, 0, 255);
845 vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
846 data->pwm_auto_pwm[ix][ap]);
847 mutex_unlock(&data->update_lock);
848
849 return count;
850 }
851
852 /* ---------------------------------------------------------------------
853 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
854 * --------------------------------------------------------------------- */
855
show_vrm(struct device * dev,struct device_attribute * attr,char * buf)856 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
857 char *buf)
858 {
859 struct vt1211_data *data = dev_get_drvdata(dev);
860
861 return sprintf(buf, "%d\n", data->vrm);
862 }
863
set_vrm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)864 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
865 const char *buf, size_t count)
866 {
867 struct vt1211_data *data = dev_get_drvdata(dev);
868 unsigned long val;
869 int err;
870
871 err = kstrtoul(buf, 10, &val);
872 if (err)
873 return err;
874
875 if (val > 255)
876 return -EINVAL;
877
878 data->vrm = val;
879
880 return count;
881 }
882
show_vid(struct device * dev,struct device_attribute * attr,char * buf)883 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
884 char *buf)
885 {
886 struct vt1211_data *data = dev_get_drvdata(dev);
887
888 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
889 }
890
show_name(struct device * dev,struct device_attribute * attr,char * buf)891 static ssize_t show_name(struct device *dev,
892 struct device_attribute *attr, char *buf)
893 {
894 struct vt1211_data *data = dev_get_drvdata(dev);
895
896 return sprintf(buf, "%s\n", data->name);
897 }
898
show_alarms(struct device * dev,struct device_attribute * attr,char * buf)899 static ssize_t show_alarms(struct device *dev,
900 struct device_attribute *attr, char *buf)
901 {
902 struct vt1211_data *data = vt1211_update_device(dev);
903
904 return sprintf(buf, "%d\n", data->alarms);
905 }
906
907 /* ---------------------------------------------------------------------
908 * Device attribute structs
909 * --------------------------------------------------------------------- */
910
911 #define SENSOR_ATTR_IN(ix) \
912 { SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
913 show_in, NULL, SHOW_IN_INPUT, ix), \
914 SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
915 show_in, set_in, SHOW_SET_IN_MIN, ix), \
916 SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
917 show_in, set_in, SHOW_SET_IN_MAX, ix), \
918 SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
919 show_in, NULL, SHOW_IN_ALARM, ix) \
920 }
921
922 static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = {
923 SENSOR_ATTR_IN(0),
924 SENSOR_ATTR_IN(1),
925 SENSOR_ATTR_IN(2),
926 SENSOR_ATTR_IN(3),
927 SENSOR_ATTR_IN(4),
928 SENSOR_ATTR_IN(5)
929 };
930
931 #define IN_UNIT_ATTRS(X) \
932 { &vt1211_sysfs_in[X][0].dev_attr.attr, \
933 &vt1211_sysfs_in[X][1].dev_attr.attr, \
934 &vt1211_sysfs_in[X][2].dev_attr.attr, \
935 &vt1211_sysfs_in[X][3].dev_attr.attr, \
936 NULL \
937 }
938
939 static struct attribute *vt1211_in_attr[][5] = {
940 IN_UNIT_ATTRS(0),
941 IN_UNIT_ATTRS(1),
942 IN_UNIT_ATTRS(2),
943 IN_UNIT_ATTRS(3),
944 IN_UNIT_ATTRS(4),
945 IN_UNIT_ATTRS(5)
946 };
947
948 static const struct attribute_group vt1211_in_attr_group[] = {
949 { .attrs = vt1211_in_attr[0] },
950 { .attrs = vt1211_in_attr[1] },
951 { .attrs = vt1211_in_attr[2] },
952 { .attrs = vt1211_in_attr[3] },
953 { .attrs = vt1211_in_attr[4] },
954 { .attrs = vt1211_in_attr[5] }
955 };
956
957 #define SENSOR_ATTR_TEMP(ix) \
958 { SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
959 show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
960 SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
961 show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
962 SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
963 show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
964 SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
965 show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \
966 }
967
968 static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = {
969 SENSOR_ATTR_TEMP(1),
970 SENSOR_ATTR_TEMP(2),
971 SENSOR_ATTR_TEMP(3),
972 SENSOR_ATTR_TEMP(4),
973 SENSOR_ATTR_TEMP(5),
974 SENSOR_ATTR_TEMP(6),
975 SENSOR_ATTR_TEMP(7),
976 };
977
978 #define TEMP_UNIT_ATTRS(X) \
979 { &vt1211_sysfs_temp[X][0].dev_attr.attr, \
980 &vt1211_sysfs_temp[X][1].dev_attr.attr, \
981 &vt1211_sysfs_temp[X][2].dev_attr.attr, \
982 &vt1211_sysfs_temp[X][3].dev_attr.attr, \
983 NULL \
984 }
985
986 static struct attribute *vt1211_temp_attr[][5] = {
987 TEMP_UNIT_ATTRS(0),
988 TEMP_UNIT_ATTRS(1),
989 TEMP_UNIT_ATTRS(2),
990 TEMP_UNIT_ATTRS(3),
991 TEMP_UNIT_ATTRS(4),
992 TEMP_UNIT_ATTRS(5),
993 TEMP_UNIT_ATTRS(6)
994 };
995
996 static const struct attribute_group vt1211_temp_attr_group[] = {
997 { .attrs = vt1211_temp_attr[0] },
998 { .attrs = vt1211_temp_attr[1] },
999 { .attrs = vt1211_temp_attr[2] },
1000 { .attrs = vt1211_temp_attr[3] },
1001 { .attrs = vt1211_temp_attr[4] },
1002 { .attrs = vt1211_temp_attr[5] },
1003 { .attrs = vt1211_temp_attr[6] }
1004 };
1005
1006 #define SENSOR_ATTR_FAN(ix) \
1007 SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
1008 show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
1009 SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1010 show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
1011 SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
1012 show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
1013 SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1014 show_fan, NULL, SHOW_FAN_ALARM, ix-1)
1015
1016 #define SENSOR_ATTR_PWM(ix) \
1017 SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
1018 show_pwm, NULL, SHOW_PWM, ix-1), \
1019 SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
1020 show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
1021 SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
1022 show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
1023
1024 #define SENSOR_ATTR_PWM_FREQ(ix) \
1025 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
1026 show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
1027
1028 #define SENSOR_ATTR_PWM_FREQ_RO(ix) \
1029 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1030 show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
1031
1032 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1033 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1034 show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1035 ap-1, ix-1)
1036
1037 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1038 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1039 show_pwm_auto_point_temp, NULL, \
1040 ap-1, ix-1)
1041
1042 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1043 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1044 show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1045 ap-1, ix-1)
1046
1047 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1048 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1049 show_pwm_auto_point_pwm, NULL, \
1050 ap-1, ix-1)
1051
1052 static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1053 SENSOR_ATTR_FAN(1),
1054 SENSOR_ATTR_FAN(2),
1055 SENSOR_ATTR_PWM(1),
1056 SENSOR_ATTR_PWM(2),
1057 SENSOR_ATTR_PWM_FREQ(1),
1058 SENSOR_ATTR_PWM_FREQ_RO(2),
1059 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1060 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1061 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1062 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1063 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1064 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1065 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1066 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1067 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1068 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1069 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1070 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1071 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1072 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1073 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1074 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1075 };
1076
1077 static struct device_attribute vt1211_sysfs_misc[] = {
1078 __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1079 __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1080 __ATTR(name, S_IRUGO, show_name, NULL),
1081 __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1082 };
1083
1084 /* ---------------------------------------------------------------------
1085 * Device registration and initialization
1086 * --------------------------------------------------------------------- */
1087
vt1211_init_device(struct vt1211_data * data)1088 static void vt1211_init_device(struct vt1211_data *data)
1089 {
1090 /* set VRM */
1091 data->vrm = vid_which_vrm();
1092
1093 /* Read (and initialize) UCH config */
1094 data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1095 if (uch_config > -1) {
1096 data->uch_config = (data->uch_config & 0x83) |
1097 (uch_config << 2);
1098 vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1099 }
1100
1101 /*
1102 * Initialize the interrupt mode (if request at module load time).
1103 * The VT1211 implements 3 different modes for clearing interrupts:
1104 * 0: Clear INT when status register is read. Regenerate INT as long
1105 * as temp stays above hysteresis limit.
1106 * 1: Clear INT when status register is read. DON'T regenerate INT
1107 * until temp falls below hysteresis limit and exceeds hot limit
1108 * again.
1109 * 2: Clear INT when temp falls below max limit.
1110 *
1111 * The driver only allows to force mode 0 since that's the only one
1112 * that makes sense for 'sensors'
1113 */
1114 if (int_mode == 0) {
1115 vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1116 vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1117 }
1118
1119 /* Fill in some hard wired values into our data struct */
1120 data->pwm_auto_pwm[0][3] = 255;
1121 data->pwm_auto_pwm[1][3] = 255;
1122 }
1123
vt1211_remove_sysfs(struct platform_device * pdev)1124 static void vt1211_remove_sysfs(struct platform_device *pdev)
1125 {
1126 struct device *dev = &pdev->dev;
1127 int i;
1128
1129 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++)
1130 sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
1131
1132 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
1133 sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
1134
1135 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1136 device_remove_file(dev,
1137 &vt1211_sysfs_fan_pwm[i].dev_attr);
1138 }
1139 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++)
1140 device_remove_file(dev, &vt1211_sysfs_misc[i]);
1141 }
1142
vt1211_probe(struct platform_device * pdev)1143 static int vt1211_probe(struct platform_device *pdev)
1144 {
1145 struct device *dev = &pdev->dev;
1146 struct vt1211_data *data;
1147 struct resource *res;
1148 int i, err;
1149
1150 data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
1151 if (!data)
1152 return -ENOMEM;
1153
1154 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1155 if (!devm_request_region(dev, res->start, resource_size(res),
1156 DRVNAME)) {
1157 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1158 (unsigned long)res->start, (unsigned long)res->end);
1159 return -EBUSY;
1160 }
1161 data->addr = res->start;
1162 data->name = DRVNAME;
1163 mutex_init(&data->update_lock);
1164
1165 platform_set_drvdata(pdev, data);
1166
1167 /* Initialize the VT1211 chip */
1168 vt1211_init_device(data);
1169
1170 /* Create sysfs interface files */
1171 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) {
1172 if (ISVOLT(i, data->uch_config)) {
1173 err = sysfs_create_group(&dev->kobj,
1174 &vt1211_in_attr_group[i]);
1175 if (err)
1176 goto EXIT_DEV_REMOVE;
1177 }
1178 }
1179 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
1180 if (ISTEMP(i, data->uch_config)) {
1181 err = sysfs_create_group(&dev->kobj,
1182 &vt1211_temp_attr_group[i]);
1183 if (err)
1184 goto EXIT_DEV_REMOVE;
1185 }
1186 }
1187 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1188 err = device_create_file(dev,
1189 &vt1211_sysfs_fan_pwm[i].dev_attr);
1190 if (err)
1191 goto EXIT_DEV_REMOVE;
1192 }
1193 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1194 err = device_create_file(dev,
1195 &vt1211_sysfs_misc[i]);
1196 if (err)
1197 goto EXIT_DEV_REMOVE;
1198 }
1199
1200 /* Register device */
1201 data->hwmon_dev = hwmon_device_register(dev);
1202 if (IS_ERR(data->hwmon_dev)) {
1203 err = PTR_ERR(data->hwmon_dev);
1204 dev_err(dev, "Class registration failed (%d)\n", err);
1205 goto EXIT_DEV_REMOVE_SILENT;
1206 }
1207
1208 return 0;
1209
1210 EXIT_DEV_REMOVE:
1211 dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1212 EXIT_DEV_REMOVE_SILENT:
1213 vt1211_remove_sysfs(pdev);
1214 return err;
1215 }
1216
vt1211_remove(struct platform_device * pdev)1217 static int vt1211_remove(struct platform_device *pdev)
1218 {
1219 struct vt1211_data *data = platform_get_drvdata(pdev);
1220
1221 hwmon_device_unregister(data->hwmon_dev);
1222 vt1211_remove_sysfs(pdev);
1223
1224 return 0;
1225 }
1226
1227 static struct platform_driver vt1211_driver = {
1228 .driver = {
1229 .name = DRVNAME,
1230 },
1231 .probe = vt1211_probe,
1232 .remove = vt1211_remove,
1233 };
1234
vt1211_device_add(unsigned short address)1235 static int __init vt1211_device_add(unsigned short address)
1236 {
1237 struct resource res = {
1238 .start = address,
1239 .end = address + 0x7f,
1240 .flags = IORESOURCE_IO,
1241 };
1242 int err;
1243
1244 pdev = platform_device_alloc(DRVNAME, address);
1245 if (!pdev) {
1246 err = -ENOMEM;
1247 pr_err("Device allocation failed (%d)\n", err);
1248 goto EXIT;
1249 }
1250
1251 res.name = pdev->name;
1252 err = acpi_check_resource_conflict(&res);
1253 if (err)
1254 goto EXIT_DEV_PUT;
1255
1256 err = platform_device_add_resources(pdev, &res, 1);
1257 if (err) {
1258 pr_err("Device resource addition failed (%d)\n", err);
1259 goto EXIT_DEV_PUT;
1260 }
1261
1262 err = platform_device_add(pdev);
1263 if (err) {
1264 pr_err("Device addition failed (%d)\n", err);
1265 goto EXIT_DEV_PUT;
1266 }
1267
1268 return 0;
1269
1270 EXIT_DEV_PUT:
1271 platform_device_put(pdev);
1272 EXIT:
1273 return err;
1274 }
1275
vt1211_find(int sio_cip,unsigned short * address)1276 static int __init vt1211_find(int sio_cip, unsigned short *address)
1277 {
1278 int err;
1279 int devid;
1280
1281 err = superio_enter(sio_cip);
1282 if (err)
1283 return err;
1284
1285 err = -ENODEV;
1286 devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1287 if (devid != SIO_VT1211_ID)
1288 goto EXIT;
1289
1290 superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1291
1292 if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1293 pr_warn("HW monitor is disabled, skipping\n");
1294 goto EXIT;
1295 }
1296
1297 *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1298 (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1299 if (*address == 0) {
1300 pr_warn("Base address is not set, skipping\n");
1301 goto EXIT;
1302 }
1303
1304 err = 0;
1305 pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
1306 *address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
1307
1308 EXIT:
1309 superio_exit(sio_cip);
1310 return err;
1311 }
1312
vt1211_init(void)1313 static int __init vt1211_init(void)
1314 {
1315 int err;
1316 unsigned short address = 0;
1317
1318 err = vt1211_find(SIO_REG_CIP1, &address);
1319 if (err) {
1320 err = vt1211_find(SIO_REG_CIP2, &address);
1321 if (err)
1322 goto EXIT;
1323 }
1324
1325 if ((uch_config < -1) || (uch_config > 31)) {
1326 err = -EINVAL;
1327 pr_warn("Invalid UCH configuration %d. Choose a value between 0 and 31.\n",
1328 uch_config);
1329 goto EXIT;
1330 }
1331
1332 if ((int_mode < -1) || (int_mode > 0)) {
1333 err = -EINVAL;
1334 pr_warn("Invalid interrupt mode %d. Only mode 0 is supported.\n",
1335 int_mode);
1336 goto EXIT;
1337 }
1338
1339 err = platform_driver_register(&vt1211_driver);
1340 if (err)
1341 goto EXIT;
1342
1343 /* Sets global pdev as a side effect */
1344 err = vt1211_device_add(address);
1345 if (err)
1346 goto EXIT_DRV_UNREGISTER;
1347
1348 return 0;
1349
1350 EXIT_DRV_UNREGISTER:
1351 platform_driver_unregister(&vt1211_driver);
1352 EXIT:
1353 return err;
1354 }
1355
vt1211_exit(void)1356 static void __exit vt1211_exit(void)
1357 {
1358 platform_device_unregister(pdev);
1359 platform_driver_unregister(&vt1211_driver);
1360 }
1361
1362 MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
1363 MODULE_DESCRIPTION("VT1211 sensors");
1364 MODULE_LICENSE("GPL");
1365
1366 module_init(vt1211_init);
1367 module_exit(vt1211_exit);
1368