Commit | Line | Data |
---|---|---|
9de2e2e8 GR |
1 | /* |
2 | * nct6775 - Driver for the hardware monitoring functionality of | |
3 | * Nuvoton NCT677x Super-I/O chips | |
4 | * | |
5 | * Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net> | |
6 | * | |
7 | * Derived from w83627ehf driver | |
8 | * Copyright (C) 2005-2012 Jean Delvare <khali@linux-fr.org> | |
9 | * Copyright (C) 2006 Yuan Mu (Winbond), | |
10 | * Rudolf Marek <r.marek@assembler.cz> | |
11 | * David Hubbard <david.c.hubbard@gmail.com> | |
12 | * Daniel J Blueman <daniel.blueman@gmail.com> | |
13 | * Copyright (C) 2010 Sheng-Yuan Huang (Nuvoton) (PS00) | |
14 | * | |
15 | * Shamelessly ripped from the w83627hf driver | |
16 | * Copyright (C) 2003 Mark Studebaker | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation; either version 2 of the License, or | |
21 | * (at your option) any later version. | |
22 | * | |
23 | * This program is distributed in the hope that it will be useful, | |
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | * GNU General Public License for more details. | |
27 | * | |
28 | * You should have received a copy of the GNU General Public License | |
29 | * along with this program; if not, write to the Free Software | |
30 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
31 | * | |
32 | * | |
33 | * Supports the following chips: | |
34 | * | |
35 | * Chip #vin #fan #pwm #temp chip IDs man ID | |
36 | * nct6775f 9 4 3 6+3 0xb470 0xc1 0x5ca3 | |
37 | * nct6776f 9 5 3 6+3 0xc330 0xc1 0x5ca3 | |
38 | * nct6779d 15 5 5 2+6 0xc560 0xc1 0x5ca3 | |
39 | * | |
40 | * #temp lists the number of monitored temperature sources (first value) plus | |
41 | * the number of directly connectable temperature sensors (second value). | |
42 | */ | |
43 | ||
44 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
45 | ||
46 | #include <linux/module.h> | |
47 | #include <linux/init.h> | |
48 | #include <linux/slab.h> | |
49 | #include <linux/jiffies.h> | |
50 | #include <linux/platform_device.h> | |
51 | #include <linux/hwmon.h> | |
52 | #include <linux/hwmon-sysfs.h> | |
53 | #include <linux/hwmon-vid.h> | |
54 | #include <linux/err.h> | |
55 | #include <linux/mutex.h> | |
56 | #include <linux/acpi.h> | |
57 | #include <linux/io.h> | |
58 | #include "lm75.h" | |
59 | ||
60 | enum kinds { nct6775, nct6776, nct6779 }; | |
61 | ||
62 | /* used to set data->name = nct6775_device_names[data->sio_kind] */ | |
63 | static const char * const nct6775_device_names[] = { | |
64 | "nct6775", | |
65 | "nct6776", | |
66 | "nct6779", | |
67 | }; | |
68 | ||
69 | static unsigned short force_id; | |
70 | module_param(force_id, ushort, 0); | |
71 | MODULE_PARM_DESC(force_id, "Override the detected device ID"); | |
72 | ||
73 | #define DRVNAME "nct6775" | |
74 | ||
75 | /* | |
76 | * Super-I/O constants and functions | |
77 | */ | |
78 | ||
a6bd5878 | 79 | #define NCT6775_LD_ACPI 0x0a |
9de2e2e8 GR |
80 | #define NCT6775_LD_HWM 0x0b |
81 | #define NCT6775_LD_VID 0x0d | |
82 | ||
83 | #define SIO_REG_LDSEL 0x07 /* Logical device select */ | |
84 | #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */ | |
85 | #define SIO_REG_ENABLE 0x30 /* Logical device enable */ | |
86 | #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */ | |
87 | ||
88 | #define SIO_NCT6775_ID 0xb470 | |
89 | #define SIO_NCT6776_ID 0xc330 | |
90 | #define SIO_NCT6779_ID 0xc560 | |
91 | #define SIO_ID_MASK 0xFFF0 | |
92 | ||
93 | static inline void | |
94 | superio_outb(int ioreg, int reg, int val) | |
95 | { | |
96 | outb(reg, ioreg); | |
97 | outb(val, ioreg + 1); | |
98 | } | |
99 | ||
100 | static inline int | |
101 | superio_inb(int ioreg, int reg) | |
102 | { | |
103 | outb(reg, ioreg); | |
104 | return inb(ioreg + 1); | |
105 | } | |
106 | ||
107 | static inline void | |
108 | superio_select(int ioreg, int ld) | |
109 | { | |
110 | outb(SIO_REG_LDSEL, ioreg); | |
111 | outb(ld, ioreg + 1); | |
112 | } | |
113 | ||
114 | static inline int | |
115 | superio_enter(int ioreg) | |
116 | { | |
117 | /* | |
118 | * Try to reserve <ioreg> and <ioreg + 1> for exclusive access. | |
119 | */ | |
120 | if (!request_muxed_region(ioreg, 2, DRVNAME)) | |
121 | return -EBUSY; | |
122 | ||
123 | outb(0x87, ioreg); | |
124 | outb(0x87, ioreg); | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | static inline void | |
130 | superio_exit(int ioreg) | |
131 | { | |
132 | outb(0xaa, ioreg); | |
133 | outb(0x02, ioreg); | |
134 | outb(0x02, ioreg + 1); | |
135 | release_region(ioreg, 2); | |
136 | } | |
137 | ||
138 | /* | |
139 | * ISA constants | |
140 | */ | |
141 | ||
142 | #define IOREGION_ALIGNMENT (~7) | |
143 | #define IOREGION_OFFSET 5 | |
144 | #define IOREGION_LENGTH 2 | |
145 | #define ADDR_REG_OFFSET 0 | |
146 | #define DATA_REG_OFFSET 1 | |
147 | ||
148 | #define NCT6775_REG_BANK 0x4E | |
149 | #define NCT6775_REG_CONFIG 0x40 | |
150 | ||
151 | /* | |
152 | * Not currently used: | |
153 | * REG_MAN_ID has the value 0x5ca3 for all supported chips. | |
154 | * REG_CHIP_ID == 0x88/0xa1/0xc1 depending on chip model. | |
155 | * REG_MAN_ID is at port 0x4f | |
156 | * REG_CHIP_ID is at port 0x58 | |
157 | */ | |
158 | ||
159 | #define NUM_REG_ALARM 4 /* Max number of alarm registers */ | |
160 | ||
161 | /* Common and NCT6775 specific data */ | |
162 | ||
163 | /* Voltage min/max registers for nr=7..14 are in bank 5 */ | |
164 | ||
165 | static const u16 NCT6775_REG_IN_MAX[] = { | |
166 | 0x2b, 0x2d, 0x2f, 0x31, 0x33, 0x35, 0x37, 0x554, 0x556, 0x558, 0x55a, | |
167 | 0x55c, 0x55e, 0x560, 0x562 }; | |
168 | static const u16 NCT6775_REG_IN_MIN[] = { | |
169 | 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x555, 0x557, 0x559, 0x55b, | |
170 | 0x55d, 0x55f, 0x561, 0x563 }; | |
171 | static const u16 NCT6775_REG_IN[] = { | |
172 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x550, 0x551, 0x552 | |
173 | }; | |
174 | ||
175 | #define NCT6775_REG_VBAT 0x5D | |
176 | ||
177 | static const u16 NCT6775_REG_ALARM[NUM_REG_ALARM] = { 0x459, 0x45A, 0x45B }; | |
178 | ||
179 | /* 0..15 voltages, 16..23 fans, 24..31 temperatures */ | |
180 | ||
181 | static const s8 NCT6775_ALARM_BITS[] = { | |
182 | 0, 1, 2, 3, 8, 21, 20, 16, /* in0.. in7 */ | |
183 | 17, -1, -1, -1, -1, -1, -1, /* in8..in14 */ | |
184 | -1, /* unused */ | |
185 | 6, 7, 11, 10, 23, /* fan1..fan5 */ | |
186 | -1, -1, -1, /* unused */ | |
187 | 4, 5, 13, -1, -1, -1, /* temp1..temp6 */ | |
188 | 12, -1 }; /* intrusion0, intrusion1 */ | |
189 | ||
a6bd5878 GR |
190 | #define INTRUSION_ALARM_BASE 30 |
191 | ||
192 | static const u8 NCT6775_REG_CR_CASEOPEN_CLR[] = { 0xe6, 0xee }; | |
193 | static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = { 0x20, 0x01 }; | |
194 | ||
9de2e2e8 GR |
195 | /* NCT6776 specific data */ |
196 | ||
197 | static const s8 NCT6776_ALARM_BITS[] = { | |
198 | 0, 1, 2, 3, 8, 21, 20, 16, /* in0.. in7 */ | |
199 | 17, -1, -1, -1, -1, -1, -1, /* in8..in14 */ | |
200 | -1, /* unused */ | |
201 | 6, 7, 11, 10, 23, /* fan1..fan5 */ | |
202 | -1, -1, -1, /* unused */ | |
203 | 4, 5, 13, -1, -1, -1, /* temp1..temp6 */ | |
204 | 12, 9 }; /* intrusion0, intrusion1 */ | |
205 | ||
206 | /* NCT6779 specific data */ | |
207 | ||
208 | static const u16 NCT6779_REG_IN[] = { | |
209 | 0x480, 0x481, 0x482, 0x483, 0x484, 0x485, 0x486, 0x487, | |
210 | 0x488, 0x489, 0x48a, 0x48b, 0x48c, 0x48d, 0x48e }; | |
211 | ||
212 | static const u16 NCT6779_REG_ALARM[NUM_REG_ALARM] = { | |
213 | 0x459, 0x45A, 0x45B, 0x568 }; | |
214 | ||
215 | static const s8 NCT6779_ALARM_BITS[] = { | |
216 | 0, 1, 2, 3, 8, 21, 20, 16, /* in0.. in7 */ | |
217 | 17, 24, 25, 26, 27, 28, 29, /* in8..in14 */ | |
218 | -1, /* unused */ | |
219 | 6, 7, 11, 10, 23, /* fan1..fan5 */ | |
220 | -1, -1, -1, /* unused */ | |
221 | 4, 5, 13, -1, -1, -1, /* temp1..temp6 */ | |
222 | 12, 9 }; /* intrusion0, intrusion1 */ | |
223 | ||
224 | /* | |
225 | * Conversions | |
226 | */ | |
227 | ||
228 | /* | |
229 | * Some of the voltage inputs have internal scaling, the tables below | |
230 | * contain 8 (the ADC LSB in mV) * scaling factor * 100 | |
231 | */ | |
232 | static const u16 scale_in[15] = { | |
233 | 800, 800, 1600, 1600, 800, 800, 800, 1600, 1600, 800, 800, 800, 800, | |
234 | 800, 800 | |
235 | }; | |
236 | ||
237 | static inline long in_from_reg(u8 reg, u8 nr) | |
238 | { | |
239 | return DIV_ROUND_CLOSEST(reg * scale_in[nr], 100); | |
240 | } | |
241 | ||
242 | static inline u8 in_to_reg(u32 val, u8 nr) | |
243 | { | |
244 | return clamp_val(DIV_ROUND_CLOSEST(val * 100, scale_in[nr]), 0, 255); | |
245 | } | |
246 | ||
247 | /* | |
248 | * Data structures and manipulation thereof | |
249 | */ | |
250 | ||
251 | struct nct6775_data { | |
252 | int addr; /* IO base of hw monitor block */ | |
253 | enum kinds kind; | |
254 | const char *name; | |
255 | ||
256 | struct device *hwmon_dev; | |
257 | struct mutex lock; | |
258 | ||
259 | u16 REG_CONFIG; | |
260 | u16 REG_VBAT; | |
261 | ||
262 | const s8 *ALARM_BITS; | |
263 | ||
264 | const u16 *REG_VIN; | |
265 | const u16 *REG_IN_MINMAX[2]; | |
266 | ||
267 | const u16 *REG_ALARM; | |
268 | ||
269 | struct mutex update_lock; | |
270 | bool valid; /* true if following fields are valid */ | |
271 | unsigned long last_updated; /* In jiffies */ | |
272 | ||
273 | /* Register values */ | |
274 | u8 bank; /* current register bank */ | |
275 | u8 in_num; /* number of in inputs we have */ | |
276 | u8 in[15][3]; /* [0]=in, [1]=in_max, [2]=in_min */ | |
277 | ||
278 | u64 alarms; | |
279 | ||
280 | u8 vid; | |
281 | u8 vrm; | |
282 | ||
283 | u16 have_in; | |
284 | }; | |
285 | ||
286 | struct nct6775_sio_data { | |
287 | int sioreg; | |
288 | enum kinds kind; | |
289 | }; | |
290 | ||
291 | static bool is_word_sized(struct nct6775_data *data, u16 reg) | |
292 | { | |
293 | switch (data->kind) { | |
294 | case nct6775: | |
295 | return (((reg & 0xff00) == 0x100 || | |
296 | (reg & 0xff00) == 0x200) && | |
297 | ((reg & 0x00ff) == 0x50 || | |
298 | (reg & 0x00ff) == 0x53 || | |
299 | (reg & 0x00ff) == 0x55)) || | |
300 | (reg & 0xfff0) == 0x630 || | |
301 | reg == 0x640 || reg == 0x642 || | |
302 | reg == 0x662 || | |
303 | ((reg & 0xfff0) == 0x650 && (reg & 0x000f) >= 0x06) || | |
304 | reg == 0x73 || reg == 0x75 || reg == 0x77; | |
305 | case nct6776: | |
306 | return (((reg & 0xff00) == 0x100 || | |
307 | (reg & 0xff00) == 0x200) && | |
308 | ((reg & 0x00ff) == 0x50 || | |
309 | (reg & 0x00ff) == 0x53 || | |
310 | (reg & 0x00ff) == 0x55)) || | |
311 | (reg & 0xfff0) == 0x630 || | |
312 | reg == 0x402 || | |
313 | reg == 0x640 || reg == 0x642 || | |
314 | ((reg & 0xfff0) == 0x650 && (reg & 0x000f) >= 0x06) || | |
315 | reg == 0x73 || reg == 0x75 || reg == 0x77; | |
316 | case nct6779: | |
317 | return reg == 0x150 || reg == 0x153 || reg == 0x155 || | |
318 | ((reg & 0xfff0) == 0x4b0 && (reg & 0x000f) < 0x09) || | |
319 | reg == 0x402 || | |
320 | reg == 0x63a || reg == 0x63c || reg == 0x63e || | |
321 | reg == 0x640 || reg == 0x642 || | |
322 | reg == 0x73 || reg == 0x75 || reg == 0x77 || reg == 0x79 || | |
323 | reg == 0x7b; | |
324 | } | |
325 | return false; | |
326 | } | |
327 | ||
328 | /* | |
329 | * On older chips, only registers 0x50-0x5f are banked. | |
330 | * On more recent chips, all registers are banked. | |
331 | * Assume that is the case and set the bank number for each access. | |
332 | * Cache the bank number so it only needs to be set if it changes. | |
333 | */ | |
334 | static inline void nct6775_set_bank(struct nct6775_data *data, u16 reg) | |
335 | { | |
336 | u8 bank = reg >> 8; | |
337 | if (data->bank != bank) { | |
338 | outb_p(NCT6775_REG_BANK, data->addr + ADDR_REG_OFFSET); | |
339 | outb_p(bank, data->addr + DATA_REG_OFFSET); | |
340 | data->bank = bank; | |
341 | } | |
342 | } | |
343 | ||
344 | static u16 nct6775_read_value(struct nct6775_data *data, u16 reg) | |
345 | { | |
346 | int res, word_sized = is_word_sized(data, reg); | |
347 | ||
348 | mutex_lock(&data->lock); | |
349 | ||
350 | nct6775_set_bank(data, reg); | |
351 | outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET); | |
352 | res = inb_p(data->addr + DATA_REG_OFFSET); | |
353 | if (word_sized) { | |
354 | outb_p((reg & 0xff) + 1, | |
355 | data->addr + ADDR_REG_OFFSET); | |
356 | res = (res << 8) + inb_p(data->addr + DATA_REG_OFFSET); | |
357 | } | |
358 | ||
359 | mutex_unlock(&data->lock); | |
360 | return res; | |
361 | } | |
362 | ||
363 | static int nct6775_write_value(struct nct6775_data *data, u16 reg, u16 value) | |
364 | { | |
365 | int word_sized = is_word_sized(data, reg); | |
366 | ||
367 | mutex_lock(&data->lock); | |
368 | ||
369 | nct6775_set_bank(data, reg); | |
370 | outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET); | |
371 | if (word_sized) { | |
372 | outb_p(value >> 8, data->addr + DATA_REG_OFFSET); | |
373 | outb_p((reg & 0xff) + 1, | |
374 | data->addr + ADDR_REG_OFFSET); | |
375 | } | |
376 | outb_p(value & 0xff, data->addr + DATA_REG_OFFSET); | |
377 | ||
378 | mutex_unlock(&data->lock); | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static struct nct6775_data *nct6775_update_device(struct device *dev) | |
383 | { | |
384 | struct nct6775_data *data = dev_get_drvdata(dev); | |
385 | int i; | |
386 | ||
387 | mutex_lock(&data->update_lock); | |
388 | ||
389 | if (time_after(jiffies, data->last_updated + HZ + HZ/2) | |
390 | || !data->valid) { | |
391 | /* Measured voltages and limits */ | |
392 | for (i = 0; i < data->in_num; i++) { | |
393 | if (!(data->have_in & (1 << i))) | |
394 | continue; | |
395 | ||
396 | data->in[i][0] = nct6775_read_value(data, | |
397 | data->REG_VIN[i]); | |
398 | data->in[i][1] = nct6775_read_value(data, | |
399 | data->REG_IN_MINMAX[0][i]); | |
400 | data->in[i][2] = nct6775_read_value(data, | |
401 | data->REG_IN_MINMAX[1][i]); | |
402 | } | |
403 | ||
404 | data->alarms = 0; | |
405 | for (i = 0; i < NUM_REG_ALARM; i++) { | |
406 | u8 alarm; | |
407 | if (!data->REG_ALARM[i]) | |
408 | continue; | |
409 | alarm = nct6775_read_value(data, data->REG_ALARM[i]); | |
410 | data->alarms |= ((u64)alarm) << (i << 3); | |
411 | } | |
412 | ||
413 | data->last_updated = jiffies; | |
414 | data->valid = true; | |
415 | } | |
416 | ||
417 | mutex_unlock(&data->update_lock); | |
418 | return data; | |
419 | } | |
420 | ||
421 | /* | |
422 | * Sysfs callback functions | |
423 | */ | |
424 | static ssize_t | |
425 | show_in_reg(struct device *dev, struct device_attribute *attr, char *buf) | |
426 | { | |
427 | struct nct6775_data *data = nct6775_update_device(dev); | |
428 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
429 | int nr = sattr->nr; | |
430 | int index = sattr->index; | |
431 | return sprintf(buf, "%ld\n", in_from_reg(data->in[nr][index], nr)); | |
432 | } | |
433 | ||
434 | static ssize_t | |
435 | store_in_reg(struct device *dev, struct device_attribute *attr, const char *buf, | |
436 | size_t count) | |
437 | { | |
438 | struct nct6775_data *data = dev_get_drvdata(dev); | |
439 | struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); | |
440 | int nr = sattr->nr; | |
441 | int index = sattr->index; | |
442 | unsigned long val; | |
443 | int err = kstrtoul(buf, 10, &val); | |
444 | if (err < 0) | |
445 | return err; | |
446 | mutex_lock(&data->update_lock); | |
447 | data->in[nr][index] = in_to_reg(val, nr); | |
448 | nct6775_write_value(data, data->REG_IN_MINMAX[index-1][nr], | |
449 | data->in[nr][index]); | |
450 | mutex_unlock(&data->update_lock); | |
451 | return count; | |
452 | } | |
453 | ||
454 | static ssize_t | |
455 | show_alarm(struct device *dev, struct device_attribute *attr, char *buf) | |
456 | { | |
457 | struct nct6775_data *data = nct6775_update_device(dev); | |
458 | struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); | |
459 | int nr = data->ALARM_BITS[sattr->index]; | |
460 | return sprintf(buf, "%u\n", | |
461 | (unsigned int)((data->alarms >> nr) & 0x01)); | |
462 | } | |
463 | ||
464 | static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in_reg, NULL, 0, 0); | |
465 | static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in_reg, NULL, 1, 0); | |
466 | static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in_reg, NULL, 2, 0); | |
467 | static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in_reg, NULL, 3, 0); | |
468 | static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in_reg, NULL, 4, 0); | |
469 | static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in_reg, NULL, 5, 0); | |
470 | static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in_reg, NULL, 6, 0); | |
471 | static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in_reg, NULL, 7, 0); | |
472 | static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in_reg, NULL, 8, 0); | |
473 | static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in_reg, NULL, 9, 0); | |
474 | static SENSOR_DEVICE_ATTR_2(in10_input, S_IRUGO, show_in_reg, NULL, 10, 0); | |
475 | static SENSOR_DEVICE_ATTR_2(in11_input, S_IRUGO, show_in_reg, NULL, 11, 0); | |
476 | static SENSOR_DEVICE_ATTR_2(in12_input, S_IRUGO, show_in_reg, NULL, 12, 0); | |
477 | static SENSOR_DEVICE_ATTR_2(in13_input, S_IRUGO, show_in_reg, NULL, 13, 0); | |
478 | static SENSOR_DEVICE_ATTR_2(in14_input, S_IRUGO, show_in_reg, NULL, 14, 0); | |
479 | ||
480 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
481 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
482 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
483 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
484 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4); | |
485 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5); | |
486 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); | |
487 | static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7); | |
488 | static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 8); | |
489 | static SENSOR_DEVICE_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 9); | |
490 | static SENSOR_DEVICE_ATTR(in10_alarm, S_IRUGO, show_alarm, NULL, 10); | |
491 | static SENSOR_DEVICE_ATTR(in11_alarm, S_IRUGO, show_alarm, NULL, 11); | |
492 | static SENSOR_DEVICE_ATTR(in12_alarm, S_IRUGO, show_alarm, NULL, 12); | |
493 | static SENSOR_DEVICE_ATTR(in13_alarm, S_IRUGO, show_alarm, NULL, 13); | |
494 | static SENSOR_DEVICE_ATTR(in14_alarm, S_IRUGO, show_alarm, NULL, 14); | |
495 | ||
496 | static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, show_in_reg, | |
497 | store_in_reg, 0, 1); | |
498 | static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, show_in_reg, | |
499 | store_in_reg, 1, 1); | |
500 | static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, show_in_reg, | |
501 | store_in_reg, 2, 1); | |
502 | static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, show_in_reg, | |
503 | store_in_reg, 3, 1); | |
504 | static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, show_in_reg, | |
505 | store_in_reg, 4, 1); | |
506 | static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, show_in_reg, | |
507 | store_in_reg, 5, 1); | |
508 | static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, show_in_reg, | |
509 | store_in_reg, 6, 1); | |
510 | static SENSOR_DEVICE_ATTR_2(in7_min, S_IWUSR | S_IRUGO, show_in_reg, | |
511 | store_in_reg, 7, 1); | |
512 | static SENSOR_DEVICE_ATTR_2(in8_min, S_IWUSR | S_IRUGO, show_in_reg, | |
513 | store_in_reg, 8, 1); | |
514 | static SENSOR_DEVICE_ATTR_2(in9_min, S_IWUSR | S_IRUGO, show_in_reg, | |
515 | store_in_reg, 9, 1); | |
516 | static SENSOR_DEVICE_ATTR_2(in10_min, S_IWUSR | S_IRUGO, show_in_reg, | |
517 | store_in_reg, 10, 1); | |
518 | static SENSOR_DEVICE_ATTR_2(in11_min, S_IWUSR | S_IRUGO, show_in_reg, | |
519 | store_in_reg, 11, 1); | |
520 | static SENSOR_DEVICE_ATTR_2(in12_min, S_IWUSR | S_IRUGO, show_in_reg, | |
521 | store_in_reg, 12, 1); | |
522 | static SENSOR_DEVICE_ATTR_2(in13_min, S_IWUSR | S_IRUGO, show_in_reg, | |
523 | store_in_reg, 13, 1); | |
524 | static SENSOR_DEVICE_ATTR_2(in14_min, S_IWUSR | S_IRUGO, show_in_reg, | |
525 | store_in_reg, 14, 1); | |
526 | ||
527 | static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, show_in_reg, | |
528 | store_in_reg, 0, 2); | |
529 | static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, show_in_reg, | |
530 | store_in_reg, 1, 2); | |
531 | static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, show_in_reg, | |
532 | store_in_reg, 2, 2); | |
533 | static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, show_in_reg, | |
534 | store_in_reg, 3, 2); | |
535 | static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, show_in_reg, | |
536 | store_in_reg, 4, 2); | |
537 | static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, show_in_reg, | |
538 | store_in_reg, 5, 2); | |
539 | static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, show_in_reg, | |
540 | store_in_reg, 6, 2); | |
541 | static SENSOR_DEVICE_ATTR_2(in7_max, S_IWUSR | S_IRUGO, show_in_reg, | |
542 | store_in_reg, 7, 2); | |
543 | static SENSOR_DEVICE_ATTR_2(in8_max, S_IWUSR | S_IRUGO, show_in_reg, | |
544 | store_in_reg, 8, 2); | |
545 | static SENSOR_DEVICE_ATTR_2(in9_max, S_IWUSR | S_IRUGO, show_in_reg, | |
546 | store_in_reg, 9, 2); | |
547 | static SENSOR_DEVICE_ATTR_2(in10_max, S_IWUSR | S_IRUGO, show_in_reg, | |
548 | store_in_reg, 10, 2); | |
549 | static SENSOR_DEVICE_ATTR_2(in11_max, S_IWUSR | S_IRUGO, show_in_reg, | |
550 | store_in_reg, 11, 2); | |
551 | static SENSOR_DEVICE_ATTR_2(in12_max, S_IWUSR | S_IRUGO, show_in_reg, | |
552 | store_in_reg, 12, 2); | |
553 | static SENSOR_DEVICE_ATTR_2(in13_max, S_IWUSR | S_IRUGO, show_in_reg, | |
554 | store_in_reg, 13, 2); | |
555 | static SENSOR_DEVICE_ATTR_2(in14_max, S_IWUSR | S_IRUGO, show_in_reg, | |
556 | store_in_reg, 14, 2); | |
557 | ||
558 | static struct attribute *nct6775_attributes_in[15][5] = { | |
559 | { | |
560 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
561 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
562 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
563 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
564 | NULL | |
565 | }, | |
566 | { | |
567 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
568 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
569 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
570 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
571 | NULL | |
572 | }, | |
573 | { | |
574 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
575 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
576 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
577 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
578 | NULL | |
579 | }, | |
580 | { | |
581 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
582 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
583 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
584 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
585 | NULL | |
586 | }, | |
587 | { | |
588 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
589 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
590 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
591 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
592 | NULL | |
593 | }, | |
594 | { | |
595 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
596 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
597 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
598 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
599 | NULL | |
600 | }, | |
601 | { | |
602 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
603 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
604 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
605 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
606 | NULL | |
607 | }, | |
608 | { | |
609 | &sensor_dev_attr_in7_input.dev_attr.attr, | |
610 | &sensor_dev_attr_in7_min.dev_attr.attr, | |
611 | &sensor_dev_attr_in7_max.dev_attr.attr, | |
612 | &sensor_dev_attr_in7_alarm.dev_attr.attr, | |
613 | NULL | |
614 | }, | |
615 | { | |
616 | &sensor_dev_attr_in8_input.dev_attr.attr, | |
617 | &sensor_dev_attr_in8_min.dev_attr.attr, | |
618 | &sensor_dev_attr_in8_max.dev_attr.attr, | |
619 | &sensor_dev_attr_in8_alarm.dev_attr.attr, | |
620 | NULL | |
621 | }, | |
622 | { | |
623 | &sensor_dev_attr_in9_input.dev_attr.attr, | |
624 | &sensor_dev_attr_in9_min.dev_attr.attr, | |
625 | &sensor_dev_attr_in9_max.dev_attr.attr, | |
626 | &sensor_dev_attr_in9_alarm.dev_attr.attr, | |
627 | NULL | |
628 | }, | |
629 | { | |
630 | &sensor_dev_attr_in10_input.dev_attr.attr, | |
631 | &sensor_dev_attr_in10_min.dev_attr.attr, | |
632 | &sensor_dev_attr_in10_max.dev_attr.attr, | |
633 | &sensor_dev_attr_in10_alarm.dev_attr.attr, | |
634 | NULL | |
635 | }, | |
636 | { | |
637 | &sensor_dev_attr_in11_input.dev_attr.attr, | |
638 | &sensor_dev_attr_in11_min.dev_attr.attr, | |
639 | &sensor_dev_attr_in11_max.dev_attr.attr, | |
640 | &sensor_dev_attr_in11_alarm.dev_attr.attr, | |
641 | NULL | |
642 | }, | |
643 | { | |
644 | &sensor_dev_attr_in12_input.dev_attr.attr, | |
645 | &sensor_dev_attr_in12_min.dev_attr.attr, | |
646 | &sensor_dev_attr_in12_max.dev_attr.attr, | |
647 | &sensor_dev_attr_in12_alarm.dev_attr.attr, | |
648 | NULL | |
649 | }, | |
650 | { | |
651 | &sensor_dev_attr_in13_input.dev_attr.attr, | |
652 | &sensor_dev_attr_in13_min.dev_attr.attr, | |
653 | &sensor_dev_attr_in13_max.dev_attr.attr, | |
654 | &sensor_dev_attr_in13_alarm.dev_attr.attr, | |
655 | NULL | |
656 | }, | |
657 | { | |
658 | &sensor_dev_attr_in14_input.dev_attr.attr, | |
659 | &sensor_dev_attr_in14_min.dev_attr.attr, | |
660 | &sensor_dev_attr_in14_max.dev_attr.attr, | |
661 | &sensor_dev_attr_in14_alarm.dev_attr.attr, | |
662 | NULL | |
663 | }, | |
664 | }; | |
665 | ||
666 | static const struct attribute_group nct6775_group_in[15] = { | |
667 | { .attrs = nct6775_attributes_in[0] }, | |
668 | { .attrs = nct6775_attributes_in[1] }, | |
669 | { .attrs = nct6775_attributes_in[2] }, | |
670 | { .attrs = nct6775_attributes_in[3] }, | |
671 | { .attrs = nct6775_attributes_in[4] }, | |
672 | { .attrs = nct6775_attributes_in[5] }, | |
673 | { .attrs = nct6775_attributes_in[6] }, | |
674 | { .attrs = nct6775_attributes_in[7] }, | |
675 | { .attrs = nct6775_attributes_in[8] }, | |
676 | { .attrs = nct6775_attributes_in[9] }, | |
677 | { .attrs = nct6775_attributes_in[10] }, | |
678 | { .attrs = nct6775_attributes_in[11] }, | |
679 | { .attrs = nct6775_attributes_in[12] }, | |
680 | { .attrs = nct6775_attributes_in[13] }, | |
681 | { .attrs = nct6775_attributes_in[14] }, | |
682 | }; | |
683 | ||
684 | static ssize_t | |
685 | show_name(struct device *dev, struct device_attribute *attr, char *buf) | |
686 | { | |
687 | struct nct6775_data *data = dev_get_drvdata(dev); | |
688 | ||
689 | return sprintf(buf, "%s\n", data->name); | |
690 | } | |
691 | ||
692 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
693 | ||
694 | static ssize_t | |
695 | show_vid(struct device *dev, struct device_attribute *attr, char *buf) | |
696 | { | |
697 | struct nct6775_data *data = dev_get_drvdata(dev); | |
698 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
699 | } | |
700 | ||
701 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
702 | ||
a6bd5878 GR |
703 | /* Case open detection */ |
704 | ||
705 | static ssize_t | |
706 | clear_caseopen(struct device *dev, struct device_attribute *attr, | |
707 | const char *buf, size_t count) | |
708 | { | |
709 | struct nct6775_data *data = dev_get_drvdata(dev); | |
710 | struct nct6775_sio_data *sio_data = dev->platform_data; | |
711 | int nr = to_sensor_dev_attr(attr)->index - INTRUSION_ALARM_BASE; | |
712 | unsigned long val; | |
713 | u8 reg; | |
714 | int ret; | |
715 | ||
716 | if (kstrtoul(buf, 10, &val) || val != 0) | |
717 | return -EINVAL; | |
718 | ||
719 | mutex_lock(&data->update_lock); | |
720 | ||
721 | /* | |
722 | * Use CR registers to clear caseopen status. | |
723 | * The CR registers are the same for all chips, and not all chips | |
724 | * support clearing the caseopen status through "regular" registers. | |
725 | */ | |
726 | ret = superio_enter(sio_data->sioreg); | |
727 | if (ret) { | |
728 | count = ret; | |
729 | goto error; | |
730 | } | |
731 | ||
732 | superio_select(sio_data->sioreg, NCT6775_LD_ACPI); | |
733 | reg = superio_inb(sio_data->sioreg, NCT6775_REG_CR_CASEOPEN_CLR[nr]); | |
734 | reg |= NCT6775_CR_CASEOPEN_CLR_MASK[nr]; | |
735 | superio_outb(sio_data->sioreg, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg); | |
736 | reg &= ~NCT6775_CR_CASEOPEN_CLR_MASK[nr]; | |
737 | superio_outb(sio_data->sioreg, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg); | |
738 | superio_exit(sio_data->sioreg); | |
739 | ||
740 | data->valid = false; /* Force cache refresh */ | |
741 | error: | |
742 | mutex_unlock(&data->update_lock); | |
743 | return count; | |
744 | } | |
745 | ||
746 | static struct sensor_device_attribute sda_caseopen[] = { | |
747 | SENSOR_ATTR(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm, | |
748 | clear_caseopen, INTRUSION_ALARM_BASE), | |
749 | SENSOR_ATTR(intrusion1_alarm, S_IWUSR | S_IRUGO, show_alarm, | |
750 | clear_caseopen, INTRUSION_ALARM_BASE + 1), | |
751 | }; | |
752 | ||
9de2e2e8 GR |
753 | /* |
754 | * Driver and device management | |
755 | */ | |
756 | ||
757 | static void nct6775_device_remove_files(struct device *dev) | |
758 | { | |
759 | /* | |
760 | * some entries in the following arrays may not have been used in | |
761 | * device_create_file(), but device_remove_file() will ignore them | |
762 | */ | |
763 | int i; | |
764 | struct nct6775_data *data = dev_get_drvdata(dev); | |
765 | ||
766 | for (i = 0; i < data->in_num; i++) | |
767 | sysfs_remove_group(&dev->kobj, &nct6775_group_in[i]); | |
768 | ||
a6bd5878 GR |
769 | device_remove_file(dev, &sda_caseopen[0].dev_attr); |
770 | device_remove_file(dev, &sda_caseopen[1].dev_attr); | |
771 | ||
9de2e2e8 GR |
772 | device_remove_file(dev, &dev_attr_name); |
773 | device_remove_file(dev, &dev_attr_cpu0_vid); | |
774 | } | |
775 | ||
776 | /* Get the monitoring functions started */ | |
777 | static inline void nct6775_init_device(struct nct6775_data *data) | |
778 | { | |
779 | u8 tmp; | |
780 | ||
781 | /* Start monitoring if needed */ | |
782 | if (data->REG_CONFIG) { | |
783 | tmp = nct6775_read_value(data, data->REG_CONFIG); | |
784 | if (!(tmp & 0x01)) | |
785 | nct6775_write_value(data, data->REG_CONFIG, tmp | 0x01); | |
786 | } | |
787 | ||
788 | /* Enable VBAT monitoring if needed */ | |
789 | tmp = nct6775_read_value(data, data->REG_VBAT); | |
790 | if (!(tmp & 0x01)) | |
791 | nct6775_write_value(data, data->REG_VBAT, tmp | 0x01); | |
792 | } | |
793 | ||
794 | static int nct6775_probe(struct platform_device *pdev) | |
795 | { | |
796 | struct device *dev = &pdev->dev; | |
797 | struct nct6775_sio_data *sio_data = dev->platform_data; | |
798 | struct nct6775_data *data; | |
799 | struct resource *res; | |
800 | int i, err = 0; | |
801 | ||
802 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
803 | if (!devm_request_region(&pdev->dev, res->start, IOREGION_LENGTH, | |
804 | DRVNAME)) | |
805 | return -EBUSY; | |
806 | ||
807 | data = devm_kzalloc(&pdev->dev, sizeof(struct nct6775_data), | |
808 | GFP_KERNEL); | |
809 | if (!data) | |
810 | return -ENOMEM; | |
811 | ||
812 | data->kind = sio_data->kind; | |
813 | data->addr = res->start; | |
814 | mutex_init(&data->lock); | |
815 | mutex_init(&data->update_lock); | |
816 | data->name = nct6775_device_names[data->kind]; | |
817 | data->bank = 0xff; /* Force initial bank selection */ | |
818 | platform_set_drvdata(pdev, data); | |
819 | ||
820 | switch (data->kind) { | |
821 | case nct6775: | |
822 | data->in_num = 9; | |
823 | ||
824 | data->ALARM_BITS = NCT6775_ALARM_BITS; | |
825 | ||
826 | data->REG_CONFIG = NCT6775_REG_CONFIG; | |
827 | data->REG_VBAT = NCT6775_REG_VBAT; | |
828 | data->REG_VIN = NCT6775_REG_IN; | |
829 | data->REG_IN_MINMAX[0] = NCT6775_REG_IN_MIN; | |
830 | data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX; | |
831 | data->REG_ALARM = NCT6775_REG_ALARM; | |
832 | break; | |
833 | case nct6776: | |
834 | data->in_num = 9; | |
835 | ||
836 | data->ALARM_BITS = NCT6776_ALARM_BITS; | |
837 | ||
838 | data->REG_CONFIG = NCT6775_REG_CONFIG; | |
839 | data->REG_VBAT = NCT6775_REG_VBAT; | |
840 | data->REG_VIN = NCT6775_REG_IN; | |
841 | data->REG_IN_MINMAX[0] = NCT6775_REG_IN_MIN; | |
842 | data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX; | |
843 | data->REG_ALARM = NCT6775_REG_ALARM; | |
844 | break; | |
845 | case nct6779: | |
846 | data->in_num = 15; | |
847 | ||
848 | data->ALARM_BITS = NCT6779_ALARM_BITS; | |
849 | ||
850 | data->REG_CONFIG = NCT6775_REG_CONFIG; | |
851 | data->REG_VBAT = NCT6775_REG_VBAT; | |
852 | data->REG_VIN = NCT6779_REG_IN; | |
853 | data->REG_IN_MINMAX[0] = NCT6775_REG_IN_MIN; | |
854 | data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX; | |
855 | data->REG_ALARM = NCT6779_REG_ALARM; | |
856 | break; | |
857 | default: | |
858 | return -ENODEV; | |
859 | } | |
860 | data->have_in = (1 << data->in_num) - 1; | |
861 | ||
862 | /* Initialize the chip */ | |
863 | nct6775_init_device(data); | |
864 | ||
865 | data->vrm = vid_which_vrm(); | |
866 | err = superio_enter(sio_data->sioreg); | |
867 | if (err) | |
868 | return err; | |
869 | ||
870 | /* | |
871 | * Read VID value | |
872 | * We can get the VID input values directly at logical device D 0xe3. | |
873 | */ | |
874 | superio_select(sio_data->sioreg, NCT6775_LD_VID); | |
875 | data->vid = superio_inb(sio_data->sioreg, 0xe3); | |
876 | superio_exit(sio_data->sioreg); | |
877 | ||
878 | err = device_create_file(dev, &dev_attr_cpu0_vid); | |
879 | if (err) | |
880 | return err; | |
881 | ||
882 | for (i = 0; i < data->in_num; i++) { | |
883 | if (!(data->have_in & (1 << i))) | |
884 | continue; | |
885 | err = sysfs_create_group(&dev->kobj, &nct6775_group_in[i]); | |
886 | if (err) | |
887 | goto exit_remove; | |
888 | } | |
889 | ||
a6bd5878 GR |
890 | for (i = 0; i < ARRAY_SIZE(sda_caseopen); i++) { |
891 | if (data->ALARM_BITS[INTRUSION_ALARM_BASE + i] < 0) | |
892 | continue; | |
893 | err = device_create_file(dev, &sda_caseopen[i].dev_attr); | |
894 | if (err) | |
895 | goto exit_remove; | |
896 | } | |
897 | ||
9de2e2e8 GR |
898 | err = device_create_file(dev, &dev_attr_name); |
899 | if (err) | |
900 | goto exit_remove; | |
901 | ||
902 | data->hwmon_dev = hwmon_device_register(dev); | |
903 | if (IS_ERR(data->hwmon_dev)) { | |
904 | err = PTR_ERR(data->hwmon_dev); | |
905 | goto exit_remove; | |
906 | } | |
907 | ||
908 | return 0; | |
909 | ||
910 | exit_remove: | |
911 | nct6775_device_remove_files(dev); | |
912 | return err; | |
913 | } | |
914 | ||
915 | static int nct6775_remove(struct platform_device *pdev) | |
916 | { | |
917 | struct nct6775_data *data = platform_get_drvdata(pdev); | |
918 | ||
919 | hwmon_device_unregister(data->hwmon_dev); | |
920 | nct6775_device_remove_files(&pdev->dev); | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | static struct platform_driver nct6775_driver = { | |
926 | .driver = { | |
927 | .owner = THIS_MODULE, | |
928 | .name = DRVNAME, | |
929 | }, | |
930 | .probe = nct6775_probe, | |
931 | .remove = nct6775_remove, | |
932 | }; | |
933 | ||
934 | /* nct6775_find() looks for a '627 in the Super-I/O config space */ | |
935 | static int __init nct6775_find(int sioaddr, unsigned short *addr, | |
936 | struct nct6775_sio_data *sio_data) | |
937 | { | |
938 | static const char sio_name_NCT6775[] __initconst = "NCT6775F"; | |
939 | static const char sio_name_NCT6776[] __initconst = "NCT6776F"; | |
940 | static const char sio_name_NCT6779[] __initconst = "NCT6779D"; | |
941 | ||
942 | u16 val; | |
943 | const char *sio_name; | |
944 | int err; | |
945 | ||
946 | err = superio_enter(sioaddr); | |
947 | if (err) | |
948 | return err; | |
949 | ||
950 | if (force_id) | |
951 | val = force_id; | |
952 | else | |
953 | val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8) | |
954 | | superio_inb(sioaddr, SIO_REG_DEVID + 1); | |
955 | switch (val & SIO_ID_MASK) { | |
956 | case SIO_NCT6775_ID: | |
957 | sio_data->kind = nct6775; | |
958 | sio_name = sio_name_NCT6775; | |
959 | break; | |
960 | case SIO_NCT6776_ID: | |
961 | sio_data->kind = nct6776; | |
962 | sio_name = sio_name_NCT6776; | |
963 | break; | |
964 | case SIO_NCT6779_ID: | |
965 | sio_data->kind = nct6779; | |
966 | sio_name = sio_name_NCT6779; | |
967 | break; | |
968 | default: | |
969 | if (val != 0xffff) | |
970 | pr_debug("unsupported chip ID: 0x%04x\n", val); | |
971 | superio_exit(sioaddr); | |
972 | return -ENODEV; | |
973 | } | |
974 | ||
975 | /* We have a known chip, find the HWM I/O address */ | |
976 | superio_select(sioaddr, NCT6775_LD_HWM); | |
977 | val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8) | |
978 | | superio_inb(sioaddr, SIO_REG_ADDR + 1); | |
979 | *addr = val & IOREGION_ALIGNMENT; | |
980 | if (*addr == 0) { | |
981 | pr_err("Refusing to enable a Super-I/O device with a base I/O port 0\n"); | |
982 | superio_exit(sioaddr); | |
983 | return -ENODEV; | |
984 | } | |
985 | ||
986 | /* Activate logical device if needed */ | |
987 | val = superio_inb(sioaddr, SIO_REG_ENABLE); | |
988 | if (!(val & 0x01)) { | |
989 | pr_warn("Forcibly enabling Super-I/O. Sensor is probably unusable.\n"); | |
990 | superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01); | |
991 | } | |
992 | ||
993 | superio_exit(sioaddr); | |
994 | pr_info("Found %s chip at %#x\n", sio_name, *addr); | |
995 | sio_data->sioreg = sioaddr; | |
996 | ||
997 | return 0; | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * when Super-I/O functions move to a separate file, the Super-I/O | |
1002 | * bus will manage the lifetime of the device and this module will only keep | |
1003 | * track of the nct6775 driver. But since we platform_device_alloc(), we | |
1004 | * must keep track of the device | |
1005 | */ | |
1006 | static struct platform_device *pdev; | |
1007 | ||
1008 | static int __init sensors_nct6775_init(void) | |
1009 | { | |
1010 | int err; | |
1011 | unsigned short address; | |
1012 | struct resource res; | |
1013 | struct nct6775_sio_data sio_data; | |
1014 | ||
1015 | /* | |
1016 | * initialize sio_data->kind and sio_data->sioreg. | |
1017 | * | |
1018 | * when Super-I/O functions move to a separate file, the Super-I/O | |
1019 | * driver will probe 0x2e and 0x4e and auto-detect the presence of a | |
1020 | * nct6775 hardware monitor, and call probe() | |
1021 | */ | |
1022 | if (nct6775_find(0x2e, &address, &sio_data) && | |
1023 | nct6775_find(0x4e, &address, &sio_data)) | |
1024 | return -ENODEV; | |
1025 | ||
1026 | err = platform_driver_register(&nct6775_driver); | |
1027 | if (err) | |
1028 | goto exit; | |
1029 | ||
1030 | pdev = platform_device_alloc(DRVNAME, address); | |
1031 | if (!pdev) { | |
1032 | err = -ENOMEM; | |
1033 | pr_err("Device allocation failed\n"); | |
1034 | goto exit_unregister; | |
1035 | } | |
1036 | ||
1037 | err = platform_device_add_data(pdev, &sio_data, | |
1038 | sizeof(struct nct6775_sio_data)); | |
1039 | if (err) { | |
1040 | pr_err("Platform data allocation failed\n"); | |
1041 | goto exit_device_put; | |
1042 | } | |
1043 | ||
1044 | memset(&res, 0, sizeof(res)); | |
1045 | res.name = DRVNAME; | |
1046 | res.start = address + IOREGION_OFFSET; | |
1047 | res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1; | |
1048 | res.flags = IORESOURCE_IO; | |
1049 | ||
1050 | err = acpi_check_resource_conflict(&res); | |
1051 | if (err) | |
1052 | goto exit_device_put; | |
1053 | ||
1054 | err = platform_device_add_resources(pdev, &res, 1); | |
1055 | if (err) { | |
1056 | pr_err("Device resource addition failed (%d)\n", err); | |
1057 | goto exit_device_put; | |
1058 | } | |
1059 | ||
1060 | /* platform_device_add calls probe() */ | |
1061 | err = platform_device_add(pdev); | |
1062 | if (err) { | |
1063 | pr_err("Device addition failed (%d)\n", err); | |
1064 | goto exit_device_put; | |
1065 | } | |
1066 | ||
1067 | return 0; | |
1068 | ||
1069 | exit_device_put: | |
1070 | platform_device_put(pdev); | |
1071 | exit_unregister: | |
1072 | platform_driver_unregister(&nct6775_driver); | |
1073 | exit: | |
1074 | return err; | |
1075 | } | |
1076 | ||
1077 | static void __exit sensors_nct6775_exit(void) | |
1078 | { | |
1079 | platform_device_unregister(pdev); | |
1080 | platform_driver_unregister(&nct6775_driver); | |
1081 | } | |
1082 | ||
1083 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); | |
1084 | MODULE_DESCRIPTION("NCT6775F/NCT6776F/NCT6779D driver"); | |
1085 | MODULE_LICENSE("GPL"); | |
1086 | ||
1087 | module_init(sensors_nct6775_init); | |
1088 | module_exit(sensors_nct6775_exit); |