1 /*
2 * vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
3 * monitoring features
4 * Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com>
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) (clamp_val((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) clamp_val( \
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 clamp_val((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
superio_outb(int sio_cip,int reg,int val)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
superio_inb(int sio_cip,int reg)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
superio_select(int sio_cip,int ldn)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
superio_enter(int sio_cip)229 static inline void superio_enter(int sio_cip)
230 {
231 outb(0x87, sio_cip);
232 outb(0x87, sio_cip);
233 }
234
superio_exit(int sio_cip)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
vt1211_read8(struct vt1211_data * data,u8 reg)244 static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
245 {
246 return inb(data->addr + reg);
247 }
248
vt1211_write8(struct vt1211_data * data,u8 reg,u8 val)249 static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
250 {
251 outb(val, data->addr + reg);
252 }
253
vt1211_update_device(struct device * dev)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
show_in(struct device * dev,struct device_attribute * attr,char * buf)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
set_in(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
show_temp(struct device * dev,struct device_attribute * attr,char * buf)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
set_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
show_fan(struct device * dev,struct device_attribute * attr,char * buf)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
set_fan(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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,
575 "fan div value %ld not supported. Choose one of 1, 2, 4, or 8.\n",
576 val);
577 goto EXIT;
578 }
579 vt1211_write8(data, VT1211_REG_FAN_DIV,
580 ((data->fan_div[1] << 6) |
581 (data->fan_div[0] << 4) |
582 data->fan_ctl));
583 break;
584 default:
585 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
586 }
587
588 EXIT:
589 mutex_unlock(&data->update_lock);
590 return count;
591 }
592
593 /* ---------------------------------------------------------------------
594 * PWM sysfs interfaces
595 * ix = [0-1]
596 * --------------------------------------------------------------------- */
597
598 #define SHOW_PWM 0
599 #define SHOW_SET_PWM_ENABLE 1
600 #define SHOW_SET_PWM_FREQ 2
601 #define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
602
show_pwm(struct device * dev,struct device_attribute * attr,char * buf)603 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
604 char *buf)
605 {
606 struct vt1211_data *data = vt1211_update_device(dev);
607 struct sensor_device_attribute_2 *sensor_attr_2 =
608 to_sensor_dev_attr_2(attr);
609 int ix = sensor_attr_2->index;
610 int fn = sensor_attr_2->nr;
611 int res;
612
613 switch (fn) {
614 case SHOW_PWM:
615 res = data->pwm[ix];
616 break;
617 case SHOW_SET_PWM_ENABLE:
618 res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
619 break;
620 case SHOW_SET_PWM_FREQ:
621 res = 90000 >> (data->pwm_clk & 7);
622 break;
623 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
624 res = (data->pwm_ctl[ix] & 7) + 1;
625 break;
626 default:
627 res = 0;
628 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
629 }
630
631 return sprintf(buf, "%d\n", res);
632 }
633
set_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)634 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
635 const char *buf, size_t count)
636 {
637 struct vt1211_data *data = dev_get_drvdata(dev);
638 struct sensor_device_attribute_2 *sensor_attr_2 =
639 to_sensor_dev_attr_2(attr);
640 int ix = sensor_attr_2->index;
641 int fn = sensor_attr_2->nr;
642 int tmp, reg;
643 unsigned long val;
644 int err;
645
646 err = kstrtoul(buf, 10, &val);
647 if (err)
648 return err;
649
650 mutex_lock(&data->update_lock);
651
652 switch (fn) {
653 case SHOW_SET_PWM_ENABLE:
654 /* sync the data cache */
655 reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
656 data->fan_div[0] = (reg >> 4) & 3;
657 data->fan_div[1] = (reg >> 6) & 3;
658 data->fan_ctl = reg & 0xf;
659 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
660 data->pwm_ctl[0] = reg & 0xf;
661 data->pwm_ctl[1] = (reg >> 4) & 0xf;
662 switch (val) {
663 case 0:
664 data->pwm_ctl[ix] &= 7;
665 /*
666 * disable SmartGuardian if both PWM outputs are
667 * disabled
668 */
669 if ((data->pwm_ctl[ix ^ 1] & 1) == 0)
670 data->fan_ctl &= 0xe;
671 break;
672 case 2:
673 data->pwm_ctl[ix] |= 8;
674 data->fan_ctl |= 1;
675 break;
676 default:
677 count = -EINVAL;
678 dev_warn(dev,
679 "pwm mode %ld not supported. Choose one of 0 or 2.\n",
680 val);
681 goto EXIT;
682 }
683 vt1211_write8(data, VT1211_REG_PWM_CTL,
684 ((data->pwm_ctl[1] << 4) |
685 data->pwm_ctl[0]));
686 vt1211_write8(data, VT1211_REG_FAN_DIV,
687 ((data->fan_div[1] << 6) |
688 (data->fan_div[0] << 4) |
689 data->fan_ctl));
690 break;
691 case SHOW_SET_PWM_FREQ:
692 val = 135000 / clamp_val(val, 135000 >> 7, 135000);
693 /* calculate tmp = log2(val) */
694 tmp = 0;
695 for (val >>= 1; val > 0; val >>= 1)
696 tmp++;
697 /* sync the data cache */
698 reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
699 data->pwm_clk = (reg & 0xf8) | tmp;
700 vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
701 break;
702 case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
703 if (val < 1 || val > 7) {
704 count = -EINVAL;
705 dev_warn(dev,
706 "temp channel %ld not supported. Choose a value between 1 and 7.\n",
707 val);
708 goto EXIT;
709 }
710 if (!ISTEMP(val - 1, data->uch_config)) {
711 count = -EINVAL;
712 dev_warn(dev, "temp channel %ld is not available.\n",
713 val);
714 goto EXIT;
715 }
716 /* sync the data cache */
717 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
718 data->pwm_ctl[0] = reg & 0xf;
719 data->pwm_ctl[1] = (reg >> 4) & 0xf;
720 data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
721 vt1211_write8(data, VT1211_REG_PWM_CTL,
722 ((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
723 break;
724 default:
725 dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
726 }
727
728 EXIT:
729 mutex_unlock(&data->update_lock);
730 return count;
731 }
732
733 /* ---------------------------------------------------------------------
734 * PWM auto point definitions
735 * ix = [0-1]
736 * ap = [0-3]
737 * --------------------------------------------------------------------- */
738
739 /*
740 * pwm[ix+1]_auto_point[ap+1]_temp mapping table:
741 * Note that there is only a single set of temp auto points that controls both
742 * PWM controllers. We still create 2 sets of sysfs files to make it look
743 * more consistent even though they map to the same registers.
744 *
745 * ix ap : description
746 * -------------------
747 * 0 0 : pwm1/2 off temperature (pwm_auto_temp[0])
748 * 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
749 * 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
750 * 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
751 * 1 0 : pwm1/2 off temperature (pwm_auto_temp[0])
752 * 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
753 * 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
754 * 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
755 */
756
show_pwm_auto_point_temp(struct device * dev,struct device_attribute * attr,char * buf)757 static ssize_t show_pwm_auto_point_temp(struct device *dev,
758 struct device_attribute *attr,
759 char *buf)
760 {
761 struct vt1211_data *data = vt1211_update_device(dev);
762 struct sensor_device_attribute_2 *sensor_attr_2 =
763 to_sensor_dev_attr_2(attr);
764 int ix = sensor_attr_2->index;
765 int ap = sensor_attr_2->nr;
766
767 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
768 data->pwm_auto_temp[ap]));
769 }
770
set_pwm_auto_point_temp(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)771 static ssize_t set_pwm_auto_point_temp(struct device *dev,
772 struct device_attribute *attr,
773 const char *buf, size_t count)
774 {
775 struct vt1211_data *data = dev_get_drvdata(dev);
776 struct sensor_device_attribute_2 *sensor_attr_2 =
777 to_sensor_dev_attr_2(attr);
778 int ix = sensor_attr_2->index;
779 int ap = sensor_attr_2->nr;
780 int reg;
781 long val;
782 int err;
783
784 err = kstrtol(buf, 10, &val);
785 if (err)
786 return err;
787
788
789 mutex_lock(&data->update_lock);
790
791 /* sync the data cache */
792 reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
793 data->pwm_ctl[0] = reg & 0xf;
794 data->pwm_ctl[1] = (reg >> 4) & 0xf;
795
796 data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
797 vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
798 data->pwm_auto_temp[ap]);
799 mutex_unlock(&data->update_lock);
800
801 return count;
802 }
803
804 /*
805 * pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
806 * Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
807 * be changed.
808 *
809 * ix ap : description
810 * -------------------
811 * 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0)
812 * 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1])
813 * 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
814 * 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255)
815 * 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0)
816 * 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1])
817 * 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
818 * 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255)
819 */
820
show_pwm_auto_point_pwm(struct device * dev,struct device_attribute * attr,char * buf)821 static ssize_t show_pwm_auto_point_pwm(struct device *dev,
822 struct device_attribute *attr,
823 char *buf)
824 {
825 struct vt1211_data *data = vt1211_update_device(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
831 return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
832 }
833
set_pwm_auto_point_pwm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)834 static ssize_t set_pwm_auto_point_pwm(struct device *dev,
835 struct device_attribute *attr,
836 const char *buf, size_t count)
837 {
838 struct vt1211_data *data = dev_get_drvdata(dev);
839 struct sensor_device_attribute_2 *sensor_attr_2 =
840 to_sensor_dev_attr_2(attr);
841 int ix = sensor_attr_2->index;
842 int ap = sensor_attr_2->nr;
843 unsigned long val;
844 int err;
845
846 err = kstrtoul(buf, 10, &val);
847 if (err)
848 return err;
849
850 mutex_lock(&data->update_lock);
851 data->pwm_auto_pwm[ix][ap] = clamp_val(val, 0, 255);
852 vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
853 data->pwm_auto_pwm[ix][ap]);
854 mutex_unlock(&data->update_lock);
855
856 return count;
857 }
858
859 /* ---------------------------------------------------------------------
860 * Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
861 * --------------------------------------------------------------------- */
862
show_vrm(struct device * dev,struct device_attribute * attr,char * buf)863 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
864 char *buf)
865 {
866 struct vt1211_data *data = dev_get_drvdata(dev);
867
868 return sprintf(buf, "%d\n", data->vrm);
869 }
870
set_vrm(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)871 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
872 const char *buf, size_t count)
873 {
874 struct vt1211_data *data = dev_get_drvdata(dev);
875 unsigned long val;
876 int err;
877
878 err = kstrtoul(buf, 10, &val);
879 if (err)
880 return err;
881
882 if (val > 255)
883 return -EINVAL;
884
885 data->vrm = val;
886
887 return count;
888 }
889
show_vid(struct device * dev,struct device_attribute * attr,char * buf)890 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
891 char *buf)
892 {
893 struct vt1211_data *data = dev_get_drvdata(dev);
894
895 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
896 }
897
show_name(struct device * dev,struct device_attribute * attr,char * buf)898 static ssize_t show_name(struct device *dev,
899 struct device_attribute *attr, char *buf)
900 {
901 struct vt1211_data *data = dev_get_drvdata(dev);
902
903 return sprintf(buf, "%s\n", data->name);
904 }
905
show_alarms(struct device * dev,struct device_attribute * attr,char * buf)906 static ssize_t show_alarms(struct device *dev,
907 struct device_attribute *attr, char *buf)
908 {
909 struct vt1211_data *data = vt1211_update_device(dev);
910
911 return sprintf(buf, "%d\n", data->alarms);
912 }
913
914 /* ---------------------------------------------------------------------
915 * Device attribute structs
916 * --------------------------------------------------------------------- */
917
918 #define SENSOR_ATTR_IN(ix) \
919 { SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
920 show_in, NULL, SHOW_IN_INPUT, ix), \
921 SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
922 show_in, set_in, SHOW_SET_IN_MIN, ix), \
923 SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
924 show_in, set_in, SHOW_SET_IN_MAX, ix), \
925 SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
926 show_in, NULL, SHOW_IN_ALARM, ix) \
927 }
928
929 static struct sensor_device_attribute_2 vt1211_sysfs_in[][4] = {
930 SENSOR_ATTR_IN(0),
931 SENSOR_ATTR_IN(1),
932 SENSOR_ATTR_IN(2),
933 SENSOR_ATTR_IN(3),
934 SENSOR_ATTR_IN(4),
935 SENSOR_ATTR_IN(5)
936 };
937
938 #define IN_UNIT_ATTRS(X) \
939 { &vt1211_sysfs_in[X][0].dev_attr.attr, \
940 &vt1211_sysfs_in[X][1].dev_attr.attr, \
941 &vt1211_sysfs_in[X][2].dev_attr.attr, \
942 &vt1211_sysfs_in[X][3].dev_attr.attr, \
943 NULL \
944 }
945
946 static struct attribute *vt1211_in_attr[][5] = {
947 IN_UNIT_ATTRS(0),
948 IN_UNIT_ATTRS(1),
949 IN_UNIT_ATTRS(2),
950 IN_UNIT_ATTRS(3),
951 IN_UNIT_ATTRS(4),
952 IN_UNIT_ATTRS(5)
953 };
954
955 static const struct attribute_group vt1211_in_attr_group[] = {
956 { .attrs = vt1211_in_attr[0] },
957 { .attrs = vt1211_in_attr[1] },
958 { .attrs = vt1211_in_attr[2] },
959 { .attrs = vt1211_in_attr[3] },
960 { .attrs = vt1211_in_attr[4] },
961 { .attrs = vt1211_in_attr[5] }
962 };
963
964 #define SENSOR_ATTR_TEMP(ix) \
965 { SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
966 show_temp, NULL, SHOW_TEMP_INPUT, ix-1), \
967 SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
968 show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1), \
969 SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
970 show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1), \
971 SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
972 show_temp, NULL, SHOW_TEMP_ALARM, ix-1) \
973 }
974
975 static struct sensor_device_attribute_2 vt1211_sysfs_temp[][4] = {
976 SENSOR_ATTR_TEMP(1),
977 SENSOR_ATTR_TEMP(2),
978 SENSOR_ATTR_TEMP(3),
979 SENSOR_ATTR_TEMP(4),
980 SENSOR_ATTR_TEMP(5),
981 SENSOR_ATTR_TEMP(6),
982 SENSOR_ATTR_TEMP(7),
983 };
984
985 #define TEMP_UNIT_ATTRS(X) \
986 { &vt1211_sysfs_temp[X][0].dev_attr.attr, \
987 &vt1211_sysfs_temp[X][1].dev_attr.attr, \
988 &vt1211_sysfs_temp[X][2].dev_attr.attr, \
989 &vt1211_sysfs_temp[X][3].dev_attr.attr, \
990 NULL \
991 }
992
993 static struct attribute *vt1211_temp_attr[][5] = {
994 TEMP_UNIT_ATTRS(0),
995 TEMP_UNIT_ATTRS(1),
996 TEMP_UNIT_ATTRS(2),
997 TEMP_UNIT_ATTRS(3),
998 TEMP_UNIT_ATTRS(4),
999 TEMP_UNIT_ATTRS(5),
1000 TEMP_UNIT_ATTRS(6)
1001 };
1002
1003 static const struct attribute_group vt1211_temp_attr_group[] = {
1004 { .attrs = vt1211_temp_attr[0] },
1005 { .attrs = vt1211_temp_attr[1] },
1006 { .attrs = vt1211_temp_attr[2] },
1007 { .attrs = vt1211_temp_attr[3] },
1008 { .attrs = vt1211_temp_attr[4] },
1009 { .attrs = vt1211_temp_attr[5] },
1010 { .attrs = vt1211_temp_attr[6] }
1011 };
1012
1013 #define SENSOR_ATTR_FAN(ix) \
1014 SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
1015 show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
1016 SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1017 show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
1018 SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
1019 show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
1020 SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1021 show_fan, NULL, SHOW_FAN_ALARM, ix-1)
1022
1023 #define SENSOR_ATTR_PWM(ix) \
1024 SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
1025 show_pwm, NULL, SHOW_PWM, ix-1), \
1026 SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
1027 show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
1028 SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
1029 show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
1030
1031 #define SENSOR_ATTR_PWM_FREQ(ix) \
1032 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
1033 show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
1034
1035 #define SENSOR_ATTR_PWM_FREQ_RO(ix) \
1036 SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1037 show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
1038
1039 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
1040 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
1041 show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
1042 ap-1, ix-1)
1043
1044 #define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
1045 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
1046 show_pwm_auto_point_temp, NULL, \
1047 ap-1, ix-1)
1048
1049 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
1050 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
1051 show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
1052 ap-1, ix-1)
1053
1054 #define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
1055 SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
1056 show_pwm_auto_point_pwm, NULL, \
1057 ap-1, ix-1)
1058
1059 static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
1060 SENSOR_ATTR_FAN(1),
1061 SENSOR_ATTR_FAN(2),
1062 SENSOR_ATTR_PWM(1),
1063 SENSOR_ATTR_PWM(2),
1064 SENSOR_ATTR_PWM_FREQ(1),
1065 SENSOR_ATTR_PWM_FREQ_RO(2),
1066 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
1067 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
1068 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
1069 SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
1070 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
1071 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
1072 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
1073 SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
1074 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
1075 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
1076 SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
1077 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
1078 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
1079 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
1080 SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
1081 SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
1082 };
1083
1084 static struct device_attribute vt1211_sysfs_misc[] = {
1085 __ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
1086 __ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
1087 __ATTR(name, S_IRUGO, show_name, NULL),
1088 __ATTR(alarms, S_IRUGO, show_alarms, NULL),
1089 };
1090
1091 /* ---------------------------------------------------------------------
1092 * Device registration and initialization
1093 * --------------------------------------------------------------------- */
1094
vt1211_init_device(struct vt1211_data * data)1095 static void vt1211_init_device(struct vt1211_data *data)
1096 {
1097 /* set VRM */
1098 data->vrm = vid_which_vrm();
1099
1100 /* Read (and initialize) UCH config */
1101 data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
1102 if (uch_config > -1) {
1103 data->uch_config = (data->uch_config & 0x83) |
1104 (uch_config << 2);
1105 vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
1106 }
1107
1108 /*
1109 * Initialize the interrupt mode (if request at module load time).
1110 * The VT1211 implements 3 different modes for clearing interrupts:
1111 * 0: Clear INT when status register is read. Regenerate INT as long
1112 * as temp stays above hysteresis limit.
1113 * 1: Clear INT when status register is read. DON'T regenerate INT
1114 * until temp falls below hysteresis limit and exceeds hot limit
1115 * again.
1116 * 2: Clear INT when temp falls below max limit.
1117 *
1118 * The driver only allows to force mode 0 since that's the only one
1119 * that makes sense for 'sensors'
1120 */
1121 if (int_mode == 0) {
1122 vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
1123 vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
1124 }
1125
1126 /* Fill in some hard wired values into our data struct */
1127 data->pwm_auto_pwm[0][3] = 255;
1128 data->pwm_auto_pwm[1][3] = 255;
1129 }
1130
vt1211_remove_sysfs(struct platform_device * pdev)1131 static void vt1211_remove_sysfs(struct platform_device *pdev)
1132 {
1133 struct device *dev = &pdev->dev;
1134 int i;
1135
1136 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++)
1137 sysfs_remove_group(&dev->kobj, &vt1211_in_attr_group[i]);
1138
1139 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++)
1140 sysfs_remove_group(&dev->kobj, &vt1211_temp_attr_group[i]);
1141
1142 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1143 device_remove_file(dev,
1144 &vt1211_sysfs_fan_pwm[i].dev_attr);
1145 }
1146 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++)
1147 device_remove_file(dev, &vt1211_sysfs_misc[i]);
1148 }
1149
vt1211_probe(struct platform_device * pdev)1150 static int vt1211_probe(struct platform_device *pdev)
1151 {
1152 struct device *dev = &pdev->dev;
1153 struct vt1211_data *data;
1154 struct resource *res;
1155 int i, err;
1156
1157 data = devm_kzalloc(dev, sizeof(struct vt1211_data), GFP_KERNEL);
1158 if (!data)
1159 return -ENOMEM;
1160
1161 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1162 if (!devm_request_region(dev, res->start, resource_size(res),
1163 DRVNAME)) {
1164 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1165 (unsigned long)res->start, (unsigned long)res->end);
1166 return -EBUSY;
1167 }
1168 data->addr = res->start;
1169 data->name = DRVNAME;
1170 mutex_init(&data->update_lock);
1171
1172 platform_set_drvdata(pdev, data);
1173
1174 /* Initialize the VT1211 chip */
1175 vt1211_init_device(data);
1176
1177 /* Create sysfs interface files */
1178 for (i = 0; i < ARRAY_SIZE(vt1211_in_attr_group); i++) {
1179 if (ISVOLT(i, data->uch_config)) {
1180 err = sysfs_create_group(&dev->kobj,
1181 &vt1211_in_attr_group[i]);
1182 if (err)
1183 goto EXIT_DEV_REMOVE;
1184 }
1185 }
1186 for (i = 0; i < ARRAY_SIZE(vt1211_temp_attr_group); i++) {
1187 if (ISTEMP(i, data->uch_config)) {
1188 err = sysfs_create_group(&dev->kobj,
1189 &vt1211_temp_attr_group[i]);
1190 if (err)
1191 goto EXIT_DEV_REMOVE;
1192 }
1193 }
1194 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
1195 err = device_create_file(dev,
1196 &vt1211_sysfs_fan_pwm[i].dev_attr);
1197 if (err)
1198 goto EXIT_DEV_REMOVE;
1199 }
1200 for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
1201 err = device_create_file(dev,
1202 &vt1211_sysfs_misc[i]);
1203 if (err)
1204 goto EXIT_DEV_REMOVE;
1205 }
1206
1207 /* Register device */
1208 data->hwmon_dev = hwmon_device_register(dev);
1209 if (IS_ERR(data->hwmon_dev)) {
1210 err = PTR_ERR(data->hwmon_dev);
1211 dev_err(dev, "Class registration failed (%d)\n", err);
1212 goto EXIT_DEV_REMOVE_SILENT;
1213 }
1214
1215 return 0;
1216
1217 EXIT_DEV_REMOVE:
1218 dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
1219 EXIT_DEV_REMOVE_SILENT:
1220 vt1211_remove_sysfs(pdev);
1221 return err;
1222 }
1223
vt1211_remove(struct platform_device * pdev)1224 static int vt1211_remove(struct platform_device *pdev)
1225 {
1226 struct vt1211_data *data = platform_get_drvdata(pdev);
1227
1228 hwmon_device_unregister(data->hwmon_dev);
1229 vt1211_remove_sysfs(pdev);
1230
1231 return 0;
1232 }
1233
1234 static struct platform_driver vt1211_driver = {
1235 .driver = {
1236 .name = DRVNAME,
1237 },
1238 .probe = vt1211_probe,
1239 .remove = vt1211_remove,
1240 };
1241
vt1211_device_add(unsigned short address)1242 static int __init vt1211_device_add(unsigned short address)
1243 {
1244 struct resource res = {
1245 .start = address,
1246 .end = address + 0x7f,
1247 .flags = IORESOURCE_IO,
1248 };
1249 int err;
1250
1251 pdev = platform_device_alloc(DRVNAME, address);
1252 if (!pdev) {
1253 err = -ENOMEM;
1254 pr_err("Device allocation failed (%d)\n", err);
1255 goto EXIT;
1256 }
1257
1258 res.name = pdev->name;
1259 err = acpi_check_resource_conflict(&res);
1260 if (err)
1261 goto EXIT_DEV_PUT;
1262
1263 err = platform_device_add_resources(pdev, &res, 1);
1264 if (err) {
1265 pr_err("Device resource addition failed (%d)\n", err);
1266 goto EXIT_DEV_PUT;
1267 }
1268
1269 err = platform_device_add(pdev);
1270 if (err) {
1271 pr_err("Device addition failed (%d)\n", err);
1272 goto EXIT_DEV_PUT;
1273 }
1274
1275 return 0;
1276
1277 EXIT_DEV_PUT:
1278 platform_device_put(pdev);
1279 EXIT:
1280 return err;
1281 }
1282
vt1211_find(int sio_cip,unsigned short * address)1283 static int __init vt1211_find(int sio_cip, unsigned short *address)
1284 {
1285 int err = -ENODEV;
1286 int devid;
1287
1288 superio_enter(sio_cip);
1289
1290 devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
1291 if (devid != SIO_VT1211_ID)
1292 goto EXIT;
1293
1294 superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
1295
1296 if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
1297 pr_warn("HW monitor is disabled, skipping\n");
1298 goto EXIT;
1299 }
1300
1301 *address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
1302 (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
1303 if (*address == 0) {
1304 pr_warn("Base address is not set, skipping\n");
1305 goto EXIT;
1306 }
1307
1308 err = 0;
1309 pr_info("Found VT1211 chip at 0x%04x, revision %u\n",
1310 *address, superio_inb(sio_cip, SIO_VT1211_DEVREV));
1311
1312 EXIT:
1313 superio_exit(sio_cip);
1314 return err;
1315 }
1316
vt1211_init(void)1317 static int __init vt1211_init(void)
1318 {
1319 int err;
1320 unsigned short address = 0;
1321
1322 err = vt1211_find(SIO_REG_CIP1, &address);
1323 if (err) {
1324 err = vt1211_find(SIO_REG_CIP2, &address);
1325 if (err)
1326 goto EXIT;
1327 }
1328
1329 if ((uch_config < -1) || (uch_config > 31)) {
1330 err = -EINVAL;
1331 pr_warn("Invalid UCH configuration %d. Choose a value between 0 and 31.\n",
1332 uch_config);
1333 goto EXIT;
1334 }
1335
1336 if ((int_mode < -1) || (int_mode > 0)) {
1337 err = -EINVAL;
1338 pr_warn("Invalid interrupt mode %d. Only mode 0 is supported.\n",
1339 int_mode);
1340 goto EXIT;
1341 }
1342
1343 err = platform_driver_register(&vt1211_driver);
1344 if (err)
1345 goto EXIT;
1346
1347 /* Sets global pdev as a side effect */
1348 err = vt1211_device_add(address);
1349 if (err)
1350 goto EXIT_DRV_UNREGISTER;
1351
1352 return 0;
1353
1354 EXIT_DRV_UNREGISTER:
1355 platform_driver_unregister(&vt1211_driver);
1356 EXIT:
1357 return err;
1358 }
1359
vt1211_exit(void)1360 static void __exit vt1211_exit(void)
1361 {
1362 platform_device_unregister(pdev);
1363 platform_driver_unregister(&vt1211_driver);
1364 }
1365
1366 MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
1367 MODULE_DESCRIPTION("VT1211 sensors");
1368 MODULE_LICENSE("GPL");
1369
1370 module_init(vt1211_init);
1371 module_exit(vt1211_exit);
1372
