Root/
1 | /* |
2 | via686a.c - Part of lm_sensors, Linux kernel modules |
3 | for hardware monitoring |
4 | |
5 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
6 | Kyösti Mälkki <kmalkki@cc.hut.fi>, |
7 | Mark Studebaker <mdsxyz123@yahoo.com>, |
8 | and Bob Dougherty <bobd@stanford.edu> |
9 | (Some conversion-factor data were contributed by Jonathan Teh Soon Yew |
10 | <j.teh@iname.com> and Alex van Kaam <darkside@chello.nl>.) |
11 | |
12 | This program is free software; you can redistribute it and/or modify |
13 | it under the terms of the GNU General Public License as published by |
14 | the Free Software Foundation; either version 2 of the License, or |
15 | (at your option) any later version. |
16 | |
17 | This program is distributed in the hope that it will be useful, |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | GNU General Public License for more details. |
21 | |
22 | You should have received a copy of the GNU General Public License |
23 | along with this program; if not, write to the Free Software |
24 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
25 | */ |
26 | |
27 | /* |
28 | Supports the Via VT82C686A, VT82C686B south bridges. |
29 | Reports all as a 686A. |
30 | Warning - only supports a single device. |
31 | */ |
32 | |
33 | #include <linux/module.h> |
34 | #include <linux/slab.h> |
35 | #include <linux/pci.h> |
36 | #include <linux/jiffies.h> |
37 | #include <linux/platform_device.h> |
38 | #include <linux/hwmon.h> |
39 | #include <linux/hwmon-sysfs.h> |
40 | #include <linux/err.h> |
41 | #include <linux/init.h> |
42 | #include <linux/mutex.h> |
43 | #include <linux/sysfs.h> |
44 | #include <linux/acpi.h> |
45 | #include <linux/io.h> |
46 | |
47 | |
48 | /* If force_addr is set to anything different from 0, we forcibly enable |
49 | the device at the given address. */ |
50 | static unsigned short force_addr; |
51 | module_param(force_addr, ushort, 0); |
52 | MODULE_PARM_DESC(force_addr, |
53 | "Initialize the base address of the sensors"); |
54 | |
55 | static struct platform_device *pdev; |
56 | |
57 | /* |
58 | The Via 686a southbridge has a LM78-like chip integrated on the same IC. |
59 | This driver is a customized copy of lm78.c |
60 | */ |
61 | |
62 | /* Many VIA686A constants specified below */ |
63 | |
64 | /* Length of ISA address segment */ |
65 | #define VIA686A_EXTENT 0x80 |
66 | #define VIA686A_BASE_REG 0x70 |
67 | #define VIA686A_ENABLE_REG 0x74 |
68 | |
69 | /* The VIA686A registers */ |
70 | /* ins numbered 0-4 */ |
71 | #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) |
72 | #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) |
73 | #define VIA686A_REG_IN(nr) (0x22 + (nr)) |
74 | |
75 | /* fans numbered 1-2 */ |
76 | #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) |
77 | #define VIA686A_REG_FAN(nr) (0x28 + (nr)) |
78 | |
79 | /* temps numbered 1-3 */ |
80 | static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f }; |
81 | static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d }; |
82 | static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e }; |
83 | /* bits 7-6 */ |
84 | #define VIA686A_REG_TEMP_LOW1 0x4b |
85 | /* 2 = bits 5-4, 3 = bits 7-6 */ |
86 | #define VIA686A_REG_TEMP_LOW23 0x49 |
87 | |
88 | #define VIA686A_REG_ALARM1 0x41 |
89 | #define VIA686A_REG_ALARM2 0x42 |
90 | #define VIA686A_REG_FANDIV 0x47 |
91 | #define VIA686A_REG_CONFIG 0x40 |
92 | /* The following register sets temp interrupt mode (bits 1-0 for temp1, |
93 | 3-2 for temp2, 5-4 for temp3). Modes are: |
94 | 00 interrupt stays as long as value is out-of-range |
95 | 01 interrupt is cleared once register is read (default) |
96 | 10 comparator mode- like 00, but ignores hysteresis |
97 | 11 same as 00 */ |
98 | #define VIA686A_REG_TEMP_MODE 0x4b |
99 | /* We'll just assume that you want to set all 3 simultaneously: */ |
100 | #define VIA686A_TEMP_MODE_MASK 0x3F |
101 | #define VIA686A_TEMP_MODE_CONTINUOUS 0x00 |
102 | |
103 | /* Conversions. Limit checking is only done on the TO_REG |
104 | variants. |
105 | |
106 | ********* VOLTAGE CONVERSIONS (Bob Dougherty) ******** |
107 | From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew): |
108 | voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp |
109 | voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V |
110 | voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V |
111 | voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V |
112 | voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V |
113 | in[i]=(data[i+2]*25.0+133)*voltagefactor[i]; |
114 | That is: |
115 | volts = (25*regVal+133)*factor |
116 | regVal = (volts/factor-133)/25 |
117 | (These conversions were contributed by Jonathan Teh Soon Yew |
118 | <j.teh@iname.com>) */ |
119 | static inline u8 IN_TO_REG(long val, int inNum) |
120 | { |
121 | /* To avoid floating point, we multiply constants by 10 (100 for +12V). |
122 | Rounding is done (120500 is actually 133000 - 12500). |
123 | Remember that val is expressed in 0.001V/bit, which is why we divide |
124 | by an additional 10000 (100000 for +12V): 1000 for val and 10 (100) |
125 | for the constants. */ |
126 | if (inNum <= 1) |
127 | return (u8) |
128 | SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255); |
129 | else if (inNum == 2) |
130 | return (u8) |
131 | SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255); |
132 | else if (inNum == 3) |
133 | return (u8) |
134 | SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255); |
135 | else |
136 | return (u8) |
137 | SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255); |
138 | } |
139 | |
140 | static inline long IN_FROM_REG(u8 val, int inNum) |
141 | { |
142 | /* To avoid floating point, we multiply constants by 10 (100 for +12V). |
143 | We also multiply them by 1000 because we want 0.001V/bit for the |
144 | output value. Rounding is done. */ |
145 | if (inNum <= 1) |
146 | return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024); |
147 | else if (inNum == 2) |
148 | return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737); |
149 | else if (inNum == 3) |
150 | return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108); |
151 | else |
152 | return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714); |
153 | } |
154 | |
155 | /********* FAN RPM CONVERSIONS ********/ |
156 | /* Higher register values = slower fans (the fan's strobe gates a counter). |
157 | But this chip saturates back at 0, not at 255 like all the other chips. |
158 | So, 0 means 0 RPM */ |
159 | static inline u8 FAN_TO_REG(long rpm, int div) |
160 | { |
161 | if (rpm == 0) |
162 | return 0; |
163 | rpm = SENSORS_LIMIT(rpm, 1, 1000000); |
164 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255); |
165 | } |
166 | |
167 | #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div))) |
168 | |
169 | /******** TEMP CONVERSIONS (Bob Dougherty) *********/ |
170 | /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) |
171 | if(temp<169) |
172 | return double(temp)*0.427-32.08; |
173 | else if(temp>=169 && temp<=202) |
174 | return double(temp)*0.582-58.16; |
175 | else |
176 | return double(temp)*0.924-127.33; |
177 | |
178 | A fifth-order polynomial fits the unofficial data (provided by Alex van |
179 | Kaam <darkside@chello.nl>) a bit better. It also give more reasonable |
180 | numbers on my machine (ie. they agree with what my BIOS tells me). |
181 | Here's the fifth-order fit to the 8-bit data: |
182 | temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - |
183 | 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. |
184 | |
185 | (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for |
186 | finding my typos in this formula!) |
187 | |
188 | Alas, none of the elegant function-fit solutions will work because we |
189 | aren't allowed to use floating point in the kernel and doing it with |
190 | integers doesn't provide enough precision. So we'll do boring old |
191 | look-up table stuff. The unofficial data (see below) have effectively |
192 | 7-bit resolution (they are rounded to the nearest degree). I'm assuming |
193 | that the transfer function of the device is monotonic and smooth, so a |
194 | smooth function fit to the data will allow us to get better precision. |
195 | I used the 5th-order poly fit described above and solved for |
196 | VIA register values 0-255. I *10 before rounding, so we get tenth-degree |
197 | precision. (I could have done all 1024 values for our 10-bit readings, |
198 | but the function is very linear in the useful range (0-80 deg C), so |
199 | we'll just use linear interpolation for 10-bit readings.) So, tempLUT |
200 | is the temp at via register values 0-255: */ |
201 | static const s16 tempLUT[] = |
202 | { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, |
203 | -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, |
204 | -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, |
205 | -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, |
206 | -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, |
207 | -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, |
208 | -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, |
209 | 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, |
210 | 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, |
211 | 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, |
212 | 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, |
213 | 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, |
214 | 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, |
215 | 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, |
216 | 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, |
217 | 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, |
218 | 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, |
219 | 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, |
220 | 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, |
221 | 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, |
222 | 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, |
223 | 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 |
224 | }; |
225 | |
226 | /* the original LUT values from Alex van Kaam <darkside@chello.nl> |
227 | (for via register values 12-240): |
228 | {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, |
229 | -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, |
230 | -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, |
231 | -3,-2,-2,-1,-1,0,0,1,1,1,3,3,3,4,4,4,5,5,5,6,6,7,7,8,8,9,9,9,10,10,11,11,12, |
232 | 12,12,13,13,13,14,14,15,15,16,16,16,17,17,18,18,19,19,20,20,21,21,21,22,22, |
233 | 22,23,23,24,24,25,25,26,26,26,27,27,27,28,28,29,29,30,30,30,31,31,32,32,33, |
234 | 33,34,34,35,35,35,36,36,37,37,38,38,39,39,40,40,41,41,42,42,43,43,44,44,45, |
235 | 45,46,46,47,48,48,49,49,50,51,51,52,52,53,53,54,55,55,56,57,57,58,59,59,60, |
236 | 61,62,62,63,64,65,66,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,83,84, |
237 | 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; |
238 | |
239 | |
240 | Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed |
241 | an extra term for a good fit to these inverse data!) and then |
242 | solving for each temp value from -50 to 110 (the useable range for |
243 | this chip). Here's the fit: |
244 | viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 |
245 | - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) |
246 | Note that n=161: */ |
247 | static const u8 viaLUT[] = |
248 | { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, |
249 | 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, |
250 | 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, |
251 | 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, |
252 | 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, |
253 | 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, |
254 | 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, |
255 | 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, |
256 | 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, |
257 | 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, |
258 | 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, |
259 | 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, |
260 | 239, 240 |
261 | }; |
262 | |
263 | /* Converting temps to (8-bit) hyst and over registers |
264 | No interpolation here. |
265 | The +50 is because the temps start at -50 */ |
266 | static inline u8 TEMP_TO_REG(long val) |
267 | { |
268 | return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 : |
269 | (val < 0 ? val - 500 : val + 500) / 1000 + 50]; |
270 | } |
271 | |
272 | /* for 8-bit temperature hyst and over registers */ |
273 | #define TEMP_FROM_REG(val) ((long)tempLUT[val] * 100) |
274 | |
275 | /* for 10-bit temperature readings */ |
276 | static inline long TEMP_FROM_REG10(u16 val) |
277 | { |
278 | u16 eightBits = val >> 2; |
279 | u16 twoBits = val & 3; |
280 | |
281 | /* no interpolation for these */ |
282 | if (twoBits == 0 || eightBits == 255) |
283 | return TEMP_FROM_REG(eightBits); |
284 | |
285 | /* do some linear interpolation */ |
286 | return (tempLUT[eightBits] * (4 - twoBits) + |
287 | tempLUT[eightBits + 1] * twoBits) * 25; |
288 | } |
289 | |
290 | #define DIV_FROM_REG(val) (1 << (val)) |
291 | #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) |
292 | |
293 | /* For each registered chip, we need to keep some data in memory. |
294 | The structure is dynamically allocated. */ |
295 | struct via686a_data { |
296 | unsigned short addr; |
297 | const char *name; |
298 | struct device *hwmon_dev; |
299 | struct mutex update_lock; |
300 | char valid; /* !=0 if following fields are valid */ |
301 | unsigned long last_updated; /* In jiffies */ |
302 | |
303 | u8 in[5]; /* Register value */ |
304 | u8 in_max[5]; /* Register value */ |
305 | u8 in_min[5]; /* Register value */ |
306 | u8 fan[2]; /* Register value */ |
307 | u8 fan_min[2]; /* Register value */ |
308 | u16 temp[3]; /* Register value 10 bit */ |
309 | u8 temp_over[3]; /* Register value */ |
310 | u8 temp_hyst[3]; /* Register value */ |
311 | u8 fan_div[2]; /* Register encoding, shifted right */ |
312 | u16 alarms; /* Register encoding, combined */ |
313 | }; |
314 | |
315 | static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ |
316 | |
317 | static int via686a_probe(struct platform_device *pdev); |
318 | static int __devexit via686a_remove(struct platform_device *pdev); |
319 | |
320 | static inline int via686a_read_value(struct via686a_data *data, u8 reg) |
321 | { |
322 | return inb_p(data->addr + reg); |
323 | } |
324 | |
325 | static inline void via686a_write_value(struct via686a_data *data, u8 reg, |
326 | u8 value) |
327 | { |
328 | outb_p(value, data->addr + reg); |
329 | } |
330 | |
331 | static struct via686a_data *via686a_update_device(struct device *dev); |
332 | static void via686a_init_device(struct via686a_data *data); |
333 | |
334 | /* following are the sysfs callback functions */ |
335 | |
336 | /* 7 voltage sensors */ |
337 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
338 | char *buf) { |
339 | struct via686a_data *data = via686a_update_device(dev); |
340 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
341 | int nr = attr->index; |
342 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr)); |
343 | } |
344 | |
345 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
346 | char *buf) { |
347 | struct via686a_data *data = via686a_update_device(dev); |
348 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
349 | int nr = attr->index; |
350 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr)); |
351 | } |
352 | |
353 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
354 | char *buf) { |
355 | struct via686a_data *data = via686a_update_device(dev); |
356 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
357 | int nr = attr->index; |
358 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr)); |
359 | } |
360 | |
361 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
362 | const char *buf, size_t count) { |
363 | struct via686a_data *data = dev_get_drvdata(dev); |
364 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
365 | int nr = attr->index; |
366 | unsigned long val = simple_strtoul(buf, NULL, 10); |
367 | |
368 | mutex_lock(&data->update_lock); |
369 | data->in_min[nr] = IN_TO_REG(val, nr); |
370 | via686a_write_value(data, VIA686A_REG_IN_MIN(nr), |
371 | data->in_min[nr]); |
372 | mutex_unlock(&data->update_lock); |
373 | return count; |
374 | } |
375 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
376 | const char *buf, size_t count) { |
377 | struct via686a_data *data = dev_get_drvdata(dev); |
378 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
379 | int nr = attr->index; |
380 | unsigned long val = simple_strtoul(buf, NULL, 10); |
381 | |
382 | mutex_lock(&data->update_lock); |
383 | data->in_max[nr] = IN_TO_REG(val, nr); |
384 | via686a_write_value(data, VIA686A_REG_IN_MAX(nr), |
385 | data->in_max[nr]); |
386 | mutex_unlock(&data->update_lock); |
387 | return count; |
388 | } |
389 | #define show_in_offset(offset) \ |
390 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
391 | show_in, NULL, offset); \ |
392 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ |
393 | show_in_min, set_in_min, offset); \ |
394 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ |
395 | show_in_max, set_in_max, offset); |
396 | |
397 | show_in_offset(0); |
398 | show_in_offset(1); |
399 | show_in_offset(2); |
400 | show_in_offset(3); |
401 | show_in_offset(4); |
402 | |
403 | /* 3 temperatures */ |
404 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
405 | char *buf) { |
406 | struct via686a_data *data = via686a_update_device(dev); |
407 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
408 | int nr = attr->index; |
409 | return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr])); |
410 | } |
411 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
412 | char *buf) { |
413 | struct via686a_data *data = via686a_update_device(dev); |
414 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
415 | int nr = attr->index; |
416 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr])); |
417 | } |
418 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
419 | char *buf) { |
420 | struct via686a_data *data = via686a_update_device(dev); |
421 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
422 | int nr = attr->index; |
423 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr])); |
424 | } |
425 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
426 | const char *buf, size_t count) { |
427 | struct via686a_data *data = dev_get_drvdata(dev); |
428 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
429 | int nr = attr->index; |
430 | int val = simple_strtol(buf, NULL, 10); |
431 | |
432 | mutex_lock(&data->update_lock); |
433 | data->temp_over[nr] = TEMP_TO_REG(val); |
434 | via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr], |
435 | data->temp_over[nr]); |
436 | mutex_unlock(&data->update_lock); |
437 | return count; |
438 | } |
439 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
440 | const char *buf, size_t count) { |
441 | struct via686a_data *data = dev_get_drvdata(dev); |
442 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
443 | int nr = attr->index; |
444 | int val = simple_strtol(buf, NULL, 10); |
445 | |
446 | mutex_lock(&data->update_lock); |
447 | data->temp_hyst[nr] = TEMP_TO_REG(val); |
448 | via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr], |
449 | data->temp_hyst[nr]); |
450 | mutex_unlock(&data->update_lock); |
451 | return count; |
452 | } |
453 | #define show_temp_offset(offset) \ |
454 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
455 | show_temp, NULL, offset - 1); \ |
456 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ |
457 | show_temp_over, set_temp_over, offset - 1); \ |
458 | static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ |
459 | show_temp_hyst, set_temp_hyst, offset - 1); |
460 | |
461 | show_temp_offset(1); |
462 | show_temp_offset(2); |
463 | show_temp_offset(3); |
464 | |
465 | /* 2 Fans */ |
466 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
467 | char *buf) { |
468 | struct via686a_data *data = via686a_update_device(dev); |
469 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
470 | int nr = attr->index; |
471 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
472 | DIV_FROM_REG(data->fan_div[nr])) ); |
473 | } |
474 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
475 | char *buf) { |
476 | struct via686a_data *data = via686a_update_device(dev); |
477 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
478 | int nr = attr->index; |
479 | return sprintf(buf, "%d\n", |
480 | FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) ); |
481 | } |
482 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
483 | char *buf) { |
484 | struct via686a_data *data = via686a_update_device(dev); |
485 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
486 | int nr = attr->index; |
487 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); |
488 | } |
489 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
490 | const char *buf, size_t count) { |
491 | struct via686a_data *data = dev_get_drvdata(dev); |
492 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
493 | int nr = attr->index; |
494 | int val = simple_strtol(buf, NULL, 10); |
495 | |
496 | mutex_lock(&data->update_lock); |
497 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
498 | via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]); |
499 | mutex_unlock(&data->update_lock); |
500 | return count; |
501 | } |
502 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
503 | const char *buf, size_t count) { |
504 | struct via686a_data *data = dev_get_drvdata(dev); |
505 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
506 | int nr = attr->index; |
507 | int val = simple_strtol(buf, NULL, 10); |
508 | int old; |
509 | |
510 | mutex_lock(&data->update_lock); |
511 | old = via686a_read_value(data, VIA686A_REG_FANDIV); |
512 | data->fan_div[nr] = DIV_TO_REG(val); |
513 | old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); |
514 | via686a_write_value(data, VIA686A_REG_FANDIV, old); |
515 | mutex_unlock(&data->update_lock); |
516 | return count; |
517 | } |
518 | |
519 | #define show_fan_offset(offset) \ |
520 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ |
521 | show_fan, NULL, offset - 1); \ |
522 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ |
523 | show_fan_min, set_fan_min, offset - 1); \ |
524 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ |
525 | show_fan_div, set_fan_div, offset - 1); |
526 | |
527 | show_fan_offset(1); |
528 | show_fan_offset(2); |
529 | |
530 | /* Alarms */ |
531 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { |
532 | struct via686a_data *data = via686a_update_device(dev); |
533 | return sprintf(buf, "%u\n", data->alarms); |
534 | } |
535 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
536 | |
537 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
538 | char *buf) |
539 | { |
540 | int bitnr = to_sensor_dev_attr(attr)->index; |
541 | struct via686a_data *data = via686a_update_device(dev); |
542 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
543 | } |
544 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
545 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); |
546 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); |
547 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); |
548 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); |
549 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); |
550 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 11); |
551 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 15); |
552 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); |
553 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); |
554 | |
555 | static ssize_t show_name(struct device *dev, struct device_attribute |
556 | *devattr, char *buf) |
557 | { |
558 | struct via686a_data *data = dev_get_drvdata(dev); |
559 | return sprintf(buf, "%s\n", data->name); |
560 | } |
561 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
562 | |
563 | static struct attribute *via686a_attributes[] = { |
564 | &sensor_dev_attr_in0_input.dev_attr.attr, |
565 | &sensor_dev_attr_in1_input.dev_attr.attr, |
566 | &sensor_dev_attr_in2_input.dev_attr.attr, |
567 | &sensor_dev_attr_in3_input.dev_attr.attr, |
568 | &sensor_dev_attr_in4_input.dev_attr.attr, |
569 | &sensor_dev_attr_in0_min.dev_attr.attr, |
570 | &sensor_dev_attr_in1_min.dev_attr.attr, |
571 | &sensor_dev_attr_in2_min.dev_attr.attr, |
572 | &sensor_dev_attr_in3_min.dev_attr.attr, |
573 | &sensor_dev_attr_in4_min.dev_attr.attr, |
574 | &sensor_dev_attr_in0_max.dev_attr.attr, |
575 | &sensor_dev_attr_in1_max.dev_attr.attr, |
576 | &sensor_dev_attr_in2_max.dev_attr.attr, |
577 | &sensor_dev_attr_in3_max.dev_attr.attr, |
578 | &sensor_dev_attr_in4_max.dev_attr.attr, |
579 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
580 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
581 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
582 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
583 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
584 | |
585 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
586 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
587 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
588 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
589 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
590 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
591 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, |
592 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, |
593 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, |
594 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
595 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
596 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
597 | |
598 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
599 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
600 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
601 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
602 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
603 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
604 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
605 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
606 | |
607 | &dev_attr_alarms.attr, |
608 | &dev_attr_name.attr, |
609 | NULL |
610 | }; |
611 | |
612 | static const struct attribute_group via686a_group = { |
613 | .attrs = via686a_attributes, |
614 | }; |
615 | |
616 | static struct platform_driver via686a_driver = { |
617 | .driver = { |
618 | .owner = THIS_MODULE, |
619 | .name = "via686a", |
620 | }, |
621 | .probe = via686a_probe, |
622 | .remove = __devexit_p(via686a_remove), |
623 | }; |
624 | |
625 | |
626 | /* This is called when the module is loaded */ |
627 | static int __devinit via686a_probe(struct platform_device *pdev) |
628 | { |
629 | struct via686a_data *data; |
630 | struct resource *res; |
631 | int err; |
632 | |
633 | /* Reserve the ISA region */ |
634 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
635 | if (!request_region(res->start, VIA686A_EXTENT, |
636 | via686a_driver.driver.name)) { |
637 | dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", |
638 | (unsigned long)res->start, (unsigned long)res->end); |
639 | return -ENODEV; |
640 | } |
641 | |
642 | if (!(data = kzalloc(sizeof(struct via686a_data), GFP_KERNEL))) { |
643 | err = -ENOMEM; |
644 | goto exit_release; |
645 | } |
646 | |
647 | platform_set_drvdata(pdev, data); |
648 | data->addr = res->start; |
649 | data->name = "via686a"; |
650 | mutex_init(&data->update_lock); |
651 | |
652 | /* Initialize the VIA686A chip */ |
653 | via686a_init_device(data); |
654 | |
655 | /* Register sysfs hooks */ |
656 | if ((err = sysfs_create_group(&pdev->dev.kobj, &via686a_group))) |
657 | goto exit_free; |
658 | |
659 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
660 | if (IS_ERR(data->hwmon_dev)) { |
661 | err = PTR_ERR(data->hwmon_dev); |
662 | goto exit_remove_files; |
663 | } |
664 | |
665 | return 0; |
666 | |
667 | exit_remove_files: |
668 | sysfs_remove_group(&pdev->dev.kobj, &via686a_group); |
669 | exit_free: |
670 | kfree(data); |
671 | exit_release: |
672 | release_region(res->start, VIA686A_EXTENT); |
673 | return err; |
674 | } |
675 | |
676 | static int __devexit via686a_remove(struct platform_device *pdev) |
677 | { |
678 | struct via686a_data *data = platform_get_drvdata(pdev); |
679 | |
680 | hwmon_device_unregister(data->hwmon_dev); |
681 | sysfs_remove_group(&pdev->dev.kobj, &via686a_group); |
682 | |
683 | release_region(data->addr, VIA686A_EXTENT); |
684 | platform_set_drvdata(pdev, NULL); |
685 | kfree(data); |
686 | |
687 | return 0; |
688 | } |
689 | |
690 | static void __devinit via686a_init_device(struct via686a_data *data) |
691 | { |
692 | u8 reg; |
693 | |
694 | /* Start monitoring */ |
695 | reg = via686a_read_value(data, VIA686A_REG_CONFIG); |
696 | via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F); |
697 | |
698 | /* Configure temp interrupt mode for continuous-interrupt operation */ |
699 | reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE); |
700 | via686a_write_value(data, VIA686A_REG_TEMP_MODE, |
701 | (reg & ~VIA686A_TEMP_MODE_MASK) |
702 | | VIA686A_TEMP_MODE_CONTINUOUS); |
703 | } |
704 | |
705 | static struct via686a_data *via686a_update_device(struct device *dev) |
706 | { |
707 | struct via686a_data *data = dev_get_drvdata(dev); |
708 | int i; |
709 | |
710 | mutex_lock(&data->update_lock); |
711 | |
712 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
713 | || !data->valid) { |
714 | for (i = 0; i <= 4; i++) { |
715 | data->in[i] = |
716 | via686a_read_value(data, VIA686A_REG_IN(i)); |
717 | data->in_min[i] = via686a_read_value(data, |
718 | VIA686A_REG_IN_MIN |
719 | (i)); |
720 | data->in_max[i] = |
721 | via686a_read_value(data, VIA686A_REG_IN_MAX(i)); |
722 | } |
723 | for (i = 1; i <= 2; i++) { |
724 | data->fan[i - 1] = |
725 | via686a_read_value(data, VIA686A_REG_FAN(i)); |
726 | data->fan_min[i - 1] = via686a_read_value(data, |
727 | VIA686A_REG_FAN_MIN(i)); |
728 | } |
729 | for (i = 0; i <= 2; i++) { |
730 | data->temp[i] = via686a_read_value(data, |
731 | VIA686A_REG_TEMP[i]) << 2; |
732 | data->temp_over[i] = |
733 | via686a_read_value(data, |
734 | VIA686A_REG_TEMP_OVER[i]); |
735 | data->temp_hyst[i] = |
736 | via686a_read_value(data, |
737 | VIA686A_REG_TEMP_HYST[i]); |
738 | } |
739 | /* add in lower 2 bits |
740 | temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 |
741 | temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 |
742 | temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 |
743 | */ |
744 | data->temp[0] |= (via686a_read_value(data, |
745 | VIA686A_REG_TEMP_LOW1) |
746 | & 0xc0) >> 6; |
747 | data->temp[1] |= |
748 | (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & |
749 | 0x30) >> 4; |
750 | data->temp[2] |= |
751 | (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & |
752 | 0xc0) >> 6; |
753 | |
754 | i = via686a_read_value(data, VIA686A_REG_FANDIV); |
755 | data->fan_div[0] = (i >> 4) & 0x03; |
756 | data->fan_div[1] = i >> 6; |
757 | data->alarms = |
758 | via686a_read_value(data, |
759 | VIA686A_REG_ALARM1) | |
760 | (via686a_read_value(data, VIA686A_REG_ALARM2) << 8); |
761 | data->last_updated = jiffies; |
762 | data->valid = 1; |
763 | } |
764 | |
765 | mutex_unlock(&data->update_lock); |
766 | |
767 | return data; |
768 | } |
769 | |
770 | static const struct pci_device_id via686a_pci_ids[] = { |
771 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) }, |
772 | { 0, } |
773 | }; |
774 | |
775 | MODULE_DEVICE_TABLE(pci, via686a_pci_ids); |
776 | |
777 | static int __devinit via686a_device_add(unsigned short address) |
778 | { |
779 | struct resource res = { |
780 | .start = address, |
781 | .end = address + VIA686A_EXTENT - 1, |
782 | .name = "via686a", |
783 | .flags = IORESOURCE_IO, |
784 | }; |
785 | int err; |
786 | |
787 | err = acpi_check_resource_conflict(&res); |
788 | if (err) |
789 | goto exit; |
790 | |
791 | pdev = platform_device_alloc("via686a", address); |
792 | if (!pdev) { |
793 | err = -ENOMEM; |
794 | printk(KERN_ERR "via686a: Device allocation failed\n"); |
795 | goto exit; |
796 | } |
797 | |
798 | err = platform_device_add_resources(pdev, &res, 1); |
799 | if (err) { |
800 | printk(KERN_ERR "via686a: Device resource addition failed " |
801 | "(%d)\n", err); |
802 | goto exit_device_put; |
803 | } |
804 | |
805 | err = platform_device_add(pdev); |
806 | if (err) { |
807 | printk(KERN_ERR "via686a: Device addition failed (%d)\n", |
808 | err); |
809 | goto exit_device_put; |
810 | } |
811 | |
812 | return 0; |
813 | |
814 | exit_device_put: |
815 | platform_device_put(pdev); |
816 | exit: |
817 | return err; |
818 | } |
819 | |
820 | static int __devinit via686a_pci_probe(struct pci_dev *dev, |
821 | const struct pci_device_id *id) |
822 | { |
823 | u16 address, val; |
824 | |
825 | if (force_addr) { |
826 | address = force_addr & ~(VIA686A_EXTENT - 1); |
827 | dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address); |
828 | if (PCIBIOS_SUCCESSFUL != |
829 | pci_write_config_word(dev, VIA686A_BASE_REG, address | 1)) |
830 | return -ENODEV; |
831 | } |
832 | if (PCIBIOS_SUCCESSFUL != |
833 | pci_read_config_word(dev, VIA686A_BASE_REG, &val)) |
834 | return -ENODEV; |
835 | |
836 | address = val & ~(VIA686A_EXTENT - 1); |
837 | if (address == 0) { |
838 | dev_err(&dev->dev, "base address not set - upgrade BIOS " |
839 | "or use force_addr=0xaddr\n"); |
840 | return -ENODEV; |
841 | } |
842 | |
843 | if (PCIBIOS_SUCCESSFUL != |
844 | pci_read_config_word(dev, VIA686A_ENABLE_REG, &val)) |
845 | return -ENODEV; |
846 | if (!(val & 0x0001)) { |
847 | if (!force_addr) { |
848 | dev_warn(&dev->dev, "Sensors disabled, enable " |
849 | "with force_addr=0x%x\n", address); |
850 | return -ENODEV; |
851 | } |
852 | |
853 | dev_warn(&dev->dev, "Enabling sensors\n"); |
854 | if (PCIBIOS_SUCCESSFUL != |
855 | pci_write_config_word(dev, VIA686A_ENABLE_REG, |
856 | val | 0x0001)) |
857 | return -ENODEV; |
858 | } |
859 | |
860 | if (platform_driver_register(&via686a_driver)) |
861 | goto exit; |
862 | |
863 | /* Sets global pdev as a side effect */ |
864 | if (via686a_device_add(address)) |
865 | goto exit_unregister; |
866 | |
867 | /* Always return failure here. This is to allow other drivers to bind |
868 | * to this pci device. We don't really want to have control over the |
869 | * pci device, we only wanted to read as few register values from it. |
870 | */ |
871 | s_bridge = pci_dev_get(dev); |
872 | return -ENODEV; |
873 | |
874 | exit_unregister: |
875 | platform_driver_unregister(&via686a_driver); |
876 | exit: |
877 | return -ENODEV; |
878 | } |
879 | |
880 | static struct pci_driver via686a_pci_driver = { |
881 | .name = "via686a", |
882 | .id_table = via686a_pci_ids, |
883 | .probe = via686a_pci_probe, |
884 | }; |
885 | |
886 | static int __init sm_via686a_init(void) |
887 | { |
888 | return pci_register_driver(&via686a_pci_driver); |
889 | } |
890 | |
891 | static void __exit sm_via686a_exit(void) |
892 | { |
893 | pci_unregister_driver(&via686a_pci_driver); |
894 | if (s_bridge != NULL) { |
895 | platform_device_unregister(pdev); |
896 | platform_driver_unregister(&via686a_driver); |
897 | pci_dev_put(s_bridge); |
898 | s_bridge = NULL; |
899 | } |
900 | } |
901 | |
902 | MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, " |
903 | "Mark Studebaker <mdsxyz123@yahoo.com> " |
904 | "and Bob Dougherty <bobd@stanford.edu>"); |
905 | MODULE_DESCRIPTION("VIA 686A Sensor device"); |
906 | MODULE_LICENSE("GPL"); |
907 | |
908 | module_init(sm_via686a_init); |
909 | module_exit(sm_via686a_exit); |
910 |
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