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1da177e4 LT |
1 | /* |
2 | via686a.c - Part of lm_sensors, Linux kernel modules | |
6328c0e1 | 3 | for hardware monitoring |
be8992c2 | 4 | |
1da177e4 | 5 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
96de0e25 | 6 | Kyösti Mälkki <kmalkki@cc.hut.fi>, |
1da177e4 LT |
7 | Mark Studebaker <mdsxyz123@yahoo.com>, |
8 | and Bob Dougherty <bobd@stanford.edu> | |
be8992c2 | 9 | (Some conversion-factor data were contributed by Jonathan Teh Soon Yew |
1da177e4 LT |
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 | ||
1da177e4 LT |
33 | #include <linux/module.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/pci.h> | |
1da177e4 | 36 | #include <linux/jiffies.h> |
2ec342e6 | 37 | #include <linux/platform_device.h> |
943b0830 | 38 | #include <linux/hwmon.h> |
1e71a5a2 | 39 | #include <linux/hwmon-sysfs.h> |
943b0830 | 40 | #include <linux/err.h> |
1da177e4 | 41 | #include <linux/init.h> |
9a61bf63 | 42 | #include <linux/mutex.h> |
a5ebe668 | 43 | #include <linux/sysfs.h> |
1da177e4 LT |
44 | #include <asm/io.h> |
45 | ||
46 | ||
47 | /* If force_addr is set to anything different from 0, we forcibly enable | |
48 | the device at the given address. */ | |
02002963 | 49 | static unsigned short force_addr; |
1da177e4 LT |
50 | module_param(force_addr, ushort, 0); |
51 | MODULE_PARM_DESC(force_addr, | |
52 | "Initialize the base address of the sensors"); | |
53 | ||
2ec342e6 | 54 | static struct platform_device *pdev; |
1da177e4 LT |
55 | |
56 | /* | |
57 | The Via 686a southbridge has a LM78-like chip integrated on the same IC. | |
58 | This driver is a customized copy of lm78.c | |
59 | */ | |
60 | ||
61 | /* Many VIA686A constants specified below */ | |
62 | ||
63 | /* Length of ISA address segment */ | |
be8992c2 JD |
64 | #define VIA686A_EXTENT 0x80 |
65 | #define VIA686A_BASE_REG 0x70 | |
66 | #define VIA686A_ENABLE_REG 0x74 | |
1da177e4 LT |
67 | |
68 | /* The VIA686A registers */ | |
69 | /* ins numbered 0-4 */ | |
be8992c2 JD |
70 | #define VIA686A_REG_IN_MAX(nr) (0x2b + ((nr) * 2)) |
71 | #define VIA686A_REG_IN_MIN(nr) (0x2c + ((nr) * 2)) | |
72 | #define VIA686A_REG_IN(nr) (0x22 + (nr)) | |
1da177e4 LT |
73 | |
74 | /* fans numbered 1-2 */ | |
be8992c2 JD |
75 | #define VIA686A_REG_FAN_MIN(nr) (0x3a + (nr)) |
76 | #define VIA686A_REG_FAN(nr) (0x28 + (nr)) | |
1da177e4 | 77 | |
1da177e4 | 78 | /* temps numbered 1-3 */ |
563db2fe JD |
79 | static const u8 VIA686A_REG_TEMP[] = { 0x20, 0x21, 0x1f }; |
80 | static const u8 VIA686A_REG_TEMP_OVER[] = { 0x39, 0x3d, 0x1d }; | |
81 | static const u8 VIA686A_REG_TEMP_HYST[] = { 0x3a, 0x3e, 0x1e }; | |
be8992c2 JD |
82 | /* bits 7-6 */ |
83 | #define VIA686A_REG_TEMP_LOW1 0x4b | |
84 | /* 2 = bits 5-4, 3 = bits 7-6 */ | |
85 | #define VIA686A_REG_TEMP_LOW23 0x49 | |
86 | ||
87 | #define VIA686A_REG_ALARM1 0x41 | |
88 | #define VIA686A_REG_ALARM2 0x42 | |
89 | #define VIA686A_REG_FANDIV 0x47 | |
90 | #define VIA686A_REG_CONFIG 0x40 | |
91 | /* The following register sets temp interrupt mode (bits 1-0 for temp1, | |
1da177e4 LT |
92 | 3-2 for temp2, 5-4 for temp3). Modes are: |
93 | 00 interrupt stays as long as value is out-of-range | |
94 | 01 interrupt is cleared once register is read (default) | |
95 | 10 comparator mode- like 00, but ignores hysteresis | |
96 | 11 same as 00 */ | |
be8992c2 | 97 | #define VIA686A_REG_TEMP_MODE 0x4b |
1da177e4 | 98 | /* We'll just assume that you want to set all 3 simultaneously: */ |
be8992c2 JD |
99 | #define VIA686A_TEMP_MODE_MASK 0x3F |
100 | #define VIA686A_TEMP_MODE_CONTINUOUS 0x00 | |
1da177e4 LT |
101 | |
102 | /* Conversions. Limit checking is only done on the TO_REG | |
be8992c2 | 103 | variants. |
1da177e4 LT |
104 | |
105 | ********* VOLTAGE CONVERSIONS (Bob Dougherty) ******** | |
106 | From HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew): | |
107 | voltagefactor[0]=1.25/2628; (2628/1.25=2102.4) // Vccp | |
108 | voltagefactor[1]=1.25/2628; (2628/1.25=2102.4) // +2.5V | |
109 | voltagefactor[2]=1.67/2628; (2628/1.67=1573.7) // +3.3V | |
110 | voltagefactor[3]=2.6/2628; (2628/2.60=1010.8) // +5V | |
111 | voltagefactor[4]=6.3/2628; (2628/6.30=417.14) // +12V | |
112 | in[i]=(data[i+2]*25.0+133)*voltagefactor[i]; | |
113 | That is: | |
114 | volts = (25*regVal+133)*factor | |
115 | regVal = (volts/factor-133)/25 | |
be8992c2 | 116 | (These conversions were contributed by Jonathan Teh Soon Yew |
1da177e4 LT |
117 | <j.teh@iname.com>) */ |
118 | static inline u8 IN_TO_REG(long val, int inNum) | |
119 | { | |
120 | /* To avoid floating point, we multiply constants by 10 (100 for +12V). | |
121 | Rounding is done (120500 is actually 133000 - 12500). | |
122 | Remember that val is expressed in 0.001V/bit, which is why we divide | |
123 | by an additional 10000 (100000 for +12V): 1000 for val and 10 (100) | |
124 | for the constants. */ | |
125 | if (inNum <= 1) | |
126 | return (u8) | |
127 | SENSORS_LIMIT((val * 21024 - 1205000) / 250000, 0, 255); | |
128 | else if (inNum == 2) | |
129 | return (u8) | |
130 | SENSORS_LIMIT((val * 15737 - 1205000) / 250000, 0, 255); | |
131 | else if (inNum == 3) | |
132 | return (u8) | |
133 | SENSORS_LIMIT((val * 10108 - 1205000) / 250000, 0, 255); | |
134 | else | |
135 | return (u8) | |
136 | SENSORS_LIMIT((val * 41714 - 12050000) / 2500000, 0, 255); | |
137 | } | |
138 | ||
139 | static inline long IN_FROM_REG(u8 val, int inNum) | |
140 | { | |
141 | /* To avoid floating point, we multiply constants by 10 (100 for +12V). | |
142 | We also multiply them by 1000 because we want 0.001V/bit for the | |
143 | output value. Rounding is done. */ | |
144 | if (inNum <= 1) | |
145 | return (long) ((250000 * val + 1330000 + 21024 / 2) / 21024); | |
146 | else if (inNum == 2) | |
147 | return (long) ((250000 * val + 1330000 + 15737 / 2) / 15737); | |
148 | else if (inNum == 3) | |
149 | return (long) ((250000 * val + 1330000 + 10108 / 2) / 10108); | |
150 | else | |
151 | return (long) ((2500000 * val + 13300000 + 41714 / 2) / 41714); | |
152 | } | |
153 | ||
154 | /********* FAN RPM CONVERSIONS ********/ | |
155 | /* Higher register values = slower fans (the fan's strobe gates a counter). | |
156 | But this chip saturates back at 0, not at 255 like all the other chips. | |
157 | So, 0 means 0 RPM */ | |
158 | static inline u8 FAN_TO_REG(long rpm, int div) | |
159 | { | |
160 | if (rpm == 0) | |
161 | return 0; | |
162 | rpm = SENSORS_LIMIT(rpm, 1, 1000000); | |
163 | return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 255); | |
164 | } | |
165 | ||
166 | #define FAN_FROM_REG(val,div) ((val)==0?0:(val)==255?0:1350000/((val)*(div))) | |
167 | ||
168 | /******** TEMP CONVERSIONS (Bob Dougherty) *********/ | |
169 | /* linear fits from HWMon.cpp (Copyright 1998-2000 Jonathan Teh Soon Yew) | |
170 | if(temp<169) | |
6328c0e1 | 171 | return double(temp)*0.427-32.08; |
1da177e4 | 172 | else if(temp>=169 && temp<=202) |
6328c0e1 | 173 | return double(temp)*0.582-58.16; |
1da177e4 | 174 | else |
6328c0e1 | 175 | return double(temp)*0.924-127.33; |
1da177e4 | 176 | |
be8992c2 JD |
177 | A fifth-order polynomial fits the unofficial data (provided by Alex van |
178 | Kaam <darkside@chello.nl>) a bit better. It also give more reasonable | |
179 | numbers on my machine (ie. they agree with what my BIOS tells me). | |
1da177e4 | 180 | Here's the fifth-order fit to the 8-bit data: |
be8992c2 | 181 | temp = 1.625093e-10*val^5 - 1.001632e-07*val^4 + 2.457653e-05*val^3 - |
6328c0e1 | 182 | 2.967619e-03*val^2 + 2.175144e-01*val - 7.090067e+0. |
1da177e4 | 183 | |
be8992c2 | 184 | (2000-10-25- RFD: thanks to Uwe Andersen <uandersen@mayah.com> for |
1da177e4 LT |
185 | finding my typos in this formula!) |
186 | ||
be8992c2 JD |
187 | Alas, none of the elegant function-fit solutions will work because we |
188 | aren't allowed to use floating point in the kernel and doing it with | |
189 | integers doesn't provide enough precision. So we'll do boring old | |
190 | look-up table stuff. The unofficial data (see below) have effectively | |
191 | 7-bit resolution (they are rounded to the nearest degree). I'm assuming | |
192 | that the transfer function of the device is monotonic and smooth, so a | |
193 | smooth function fit to the data will allow us to get better precision. | |
1da177e4 | 194 | I used the 5th-order poly fit described above and solved for |
be8992c2 JD |
195 | VIA register values 0-255. I *10 before rounding, so we get tenth-degree |
196 | precision. (I could have done all 1024 values for our 10-bit readings, | |
197 | but the function is very linear in the useful range (0-80 deg C), so | |
198 | we'll just use linear interpolation for 10-bit readings.) So, tempLUT | |
1da177e4 | 199 | is the temp at via register values 0-255: */ |
088341bd | 200 | static const s16 tempLUT[] = |
be8992c2 JD |
201 | { -709, -688, -667, -646, -627, -607, -589, -570, -553, -536, -519, |
202 | -503, -487, -471, -456, -442, -428, -414, -400, -387, -375, | |
203 | -362, -350, -339, -327, -316, -305, -295, -285, -275, -265, | |
204 | -255, -246, -237, -229, -220, -212, -204, -196, -188, -180, | |
205 | -173, -166, -159, -152, -145, -139, -132, -126, -120, -114, | |
206 | -108, -102, -96, -91, -85, -80, -74, -69, -64, -59, -54, -49, | |
207 | -44, -39, -34, -29, -25, -20, -15, -11, -6, -2, 3, 7, 12, 16, | |
208 | 20, 25, 29, 33, 37, 42, 46, 50, 54, 59, 63, 67, 71, 75, 79, 84, | |
209 | 88, 92, 96, 100, 104, 109, 113, 117, 121, 125, 130, 134, 138, | |
210 | 142, 146, 151, 155, 159, 163, 168, 172, 176, 181, 185, 189, | |
211 | 193, 198, 202, 206, 211, 215, 219, 224, 228, 232, 237, 241, | |
212 | 245, 250, 254, 259, 263, 267, 272, 276, 281, 285, 290, 294, | |
213 | 299, 303, 307, 312, 316, 321, 325, 330, 334, 339, 344, 348, | |
214 | 353, 357, 362, 366, 371, 376, 380, 385, 390, 395, 399, 404, | |
215 | 409, 414, 419, 423, 428, 433, 438, 443, 449, 454, 459, 464, | |
216 | 469, 475, 480, 486, 491, 497, 502, 508, 514, 520, 526, 532, | |
217 | 538, 544, 551, 557, 564, 571, 578, 584, 592, 599, 606, 614, | |
218 | 621, 629, 637, 645, 654, 662, 671, 680, 689, 698, 708, 718, | |
219 | 728, 738, 749, 759, 770, 782, 793, 805, 818, 830, 843, 856, | |
220 | 870, 883, 898, 912, 927, 943, 958, 975, 991, 1008, 1026, 1044, | |
221 | 1062, 1081, 1101, 1121, 1141, 1162, 1184, 1206, 1229, 1252, | |
222 | 1276, 1301, 1326, 1352, 1378, 1406, 1434, 1462 | |
1da177e4 LT |
223 | }; |
224 | ||
be8992c2 | 225 | /* the original LUT values from Alex van Kaam <darkside@chello.nl> |
1da177e4 LT |
226 | (for via register values 12-240): |
227 | {-50,-49,-47,-45,-43,-41,-39,-38,-37,-35,-34,-33,-32,-31, | |
228 | -30,-29,-28,-27,-26,-25,-24,-24,-23,-22,-21,-20,-20,-19,-18,-17,-17,-16,-15, | |
229 | -15,-14,-14,-13,-12,-12,-11,-11,-10,-9,-9,-8,-8,-7,-7,-6,-6,-5,-5,-4,-4,-3, | |
230 | -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, | |
231 | 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, | |
232 | 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, | |
233 | 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, | |
234 | 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, | |
235 | 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, | |
236 | 85,86,88,89,91,92,94,96,97,99,101,103,105,107,109,110}; | |
237 | ||
238 | ||
239 | Here's the reverse LUT. I got it by doing a 6-th order poly fit (needed | |
be8992c2 JD |
240 | an extra term for a good fit to these inverse data!) and then |
241 | solving for each temp value from -50 to 110 (the useable range for | |
242 | this chip). Here's the fit: | |
243 | viaRegVal = -1.160370e-10*val^6 +3.193693e-08*val^5 - 1.464447e-06*val^4 | |
1da177e4 LT |
244 | - 2.525453e-04*val^3 + 1.424593e-02*val^2 + 2.148941e+00*val +7.275808e+01) |
245 | Note that n=161: */ | |
246 | static const u8 viaLUT[] = | |
be8992c2 JD |
247 | { 12, 12, 13, 14, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, |
248 | 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 39, 40, | |
249 | 41, 43, 45, 46, 48, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, | |
250 | 69, 71, 73, 75, 77, 79, 82, 84, 86, 88, 91, 93, 95, 98, 100, | |
251 | 103, 105, 107, 110, 112, 115, 117, 119, 122, 124, 126, 129, | |
252 | 131, 134, 136, 138, 140, 143, 145, 147, 150, 152, 154, 156, | |
253 | 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, | |
254 | 182, 183, 185, 187, 188, 190, 192, 193, 195, 196, 198, 199, | |
255 | 200, 202, 203, 205, 206, 207, 208, 209, 210, 211, 212, 213, | |
256 | 214, 215, 216, 217, 218, 219, 220, 221, 222, 222, 223, 224, | |
257 | 225, 226, 226, 227, 228, 228, 229, 230, 230, 231, 232, 232, | |
258 | 233, 233, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, | |
259 | 239, 240 | |
1da177e4 LT |
260 | }; |
261 | ||
262 | /* Converting temps to (8-bit) hyst and over registers | |
263 | No interpolation here. | |
264 | The +50 is because the temps start at -50 */ | |
265 | static inline u8 TEMP_TO_REG(long val) | |
266 | { | |
be8992c2 | 267 | return viaLUT[val <= -50000 ? 0 : val >= 110000 ? 160 : |
1da177e4 LT |
268 | (val < 0 ? val - 500 : val + 500) / 1000 + 50]; |
269 | } | |
270 | ||
271 | /* for 8-bit temperature hyst and over registers */ | |
088341bd | 272 | #define TEMP_FROM_REG(val) ((long)tempLUT[val] * 100) |
1da177e4 LT |
273 | |
274 | /* for 10-bit temperature readings */ | |
275 | static inline long TEMP_FROM_REG10(u16 val) | |
276 | { | |
277 | u16 eightBits = val >> 2; | |
278 | u16 twoBits = val & 3; | |
279 | ||
280 | /* no interpolation for these */ | |
281 | if (twoBits == 0 || eightBits == 255) | |
282 | return TEMP_FROM_REG(eightBits); | |
283 | ||
284 | /* do some linear interpolation */ | |
285 | return (tempLUT[eightBits] * (4 - twoBits) + | |
be8992c2 | 286 | tempLUT[eightBits + 1] * twoBits) * 25; |
1da177e4 LT |
287 | } |
288 | ||
1da177e4 LT |
289 | #define DIV_FROM_REG(val) (1 << (val)) |
290 | #define DIV_TO_REG(val) ((val)==8?3:(val)==4?2:(val)==1?0:1) | |
291 | ||
ed6bafbf JD |
292 | /* For each registered chip, we need to keep some data in memory. |
293 | The structure is dynamically allocated. */ | |
1da177e4 | 294 | struct via686a_data { |
2ec342e6 JD |
295 | unsigned short addr; |
296 | const char *name; | |
1beeffe4 | 297 | struct device *hwmon_dev; |
9a61bf63 | 298 | struct mutex update_lock; |
1da177e4 LT |
299 | char valid; /* !=0 if following fields are valid */ |
300 | unsigned long last_updated; /* In jiffies */ | |
301 | ||
302 | u8 in[5]; /* Register value */ | |
303 | u8 in_max[5]; /* Register value */ | |
304 | u8 in_min[5]; /* Register value */ | |
305 | u8 fan[2]; /* Register value */ | |
306 | u8 fan_min[2]; /* Register value */ | |
307 | u16 temp[3]; /* Register value 10 bit */ | |
308 | u8 temp_over[3]; /* Register value */ | |
309 | u8 temp_hyst[3]; /* Register value */ | |
310 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
311 | u16 alarms; /* Register encoding, combined */ | |
312 | }; | |
313 | ||
314 | static struct pci_dev *s_bridge; /* pointer to the (only) via686a */ | |
315 | ||
2ec342e6 | 316 | static int via686a_probe(struct platform_device *pdev); |
d0546128 | 317 | static int __devexit via686a_remove(struct platform_device *pdev); |
1da177e4 | 318 | |
2ec342e6 | 319 | static inline int via686a_read_value(struct via686a_data *data, u8 reg) |
1da177e4 | 320 | { |
2ec342e6 | 321 | return inb_p(data->addr + reg); |
1da177e4 LT |
322 | } |
323 | ||
2ec342e6 | 324 | static inline void via686a_write_value(struct via686a_data *data, u8 reg, |
1da177e4 LT |
325 | u8 value) |
326 | { | |
2ec342e6 | 327 | outb_p(value, data->addr + reg); |
1da177e4 LT |
328 | } |
329 | ||
330 | static struct via686a_data *via686a_update_device(struct device *dev); | |
2ec342e6 | 331 | static void via686a_init_device(struct via686a_data *data); |
1da177e4 LT |
332 | |
333 | /* following are the sysfs callback functions */ | |
334 | ||
335 | /* 7 voltage sensors */ | |
1e71a5a2 JD |
336 | static ssize_t show_in(struct device *dev, struct device_attribute *da, |
337 | char *buf) { | |
1da177e4 | 338 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
339 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
340 | int nr = attr->index; | |
1da177e4 LT |
341 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in[nr], nr)); |
342 | } | |
343 | ||
1e71a5a2 JD |
344 | static ssize_t show_in_min(struct device *dev, struct device_attribute *da, |
345 | char *buf) { | |
1da177e4 | 346 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
347 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
348 | int nr = attr->index; | |
1da177e4 LT |
349 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_min[nr], nr)); |
350 | } | |
351 | ||
1e71a5a2 JD |
352 | static ssize_t show_in_max(struct device *dev, struct device_attribute *da, |
353 | char *buf) { | |
1da177e4 | 354 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
355 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
356 | int nr = attr->index; | |
1da177e4 LT |
357 | return sprintf(buf, "%ld\n", IN_FROM_REG(data->in_max[nr], nr)); |
358 | } | |
359 | ||
1e71a5a2 JD |
360 | static ssize_t set_in_min(struct device *dev, struct device_attribute *da, |
361 | const char *buf, size_t count) { | |
2ec342e6 | 362 | struct via686a_data *data = dev_get_drvdata(dev); |
1e71a5a2 JD |
363 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
364 | int nr = attr->index; | |
1da177e4 LT |
365 | unsigned long val = simple_strtoul(buf, NULL, 10); |
366 | ||
9a61bf63 | 367 | mutex_lock(&data->update_lock); |
be8992c2 | 368 | data->in_min[nr] = IN_TO_REG(val, nr); |
2ec342e6 | 369 | via686a_write_value(data, VIA686A_REG_IN_MIN(nr), |
1da177e4 | 370 | data->in_min[nr]); |
9a61bf63 | 371 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
372 | return count; |
373 | } | |
1e71a5a2 JD |
374 | static ssize_t set_in_max(struct device *dev, struct device_attribute *da, |
375 | const char *buf, size_t count) { | |
2ec342e6 | 376 | struct via686a_data *data = dev_get_drvdata(dev); |
1e71a5a2 JD |
377 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
378 | int nr = attr->index; | |
1da177e4 LT |
379 | unsigned long val = simple_strtoul(buf, NULL, 10); |
380 | ||
9a61bf63 | 381 | mutex_lock(&data->update_lock); |
be8992c2 | 382 | data->in_max[nr] = IN_TO_REG(val, nr); |
2ec342e6 | 383 | via686a_write_value(data, VIA686A_REG_IN_MAX(nr), |
1da177e4 | 384 | data->in_max[nr]); |
9a61bf63 | 385 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
386 | return count; |
387 | } | |
388 | #define show_in_offset(offset) \ | |
1e71a5a2 JD |
389 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ |
390 | show_in, NULL, offset); \ | |
391 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
392 | show_in_min, set_in_min, offset); \ | |
393 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
394 | show_in_max, set_in_max, offset); | |
1da177e4 LT |
395 | |
396 | show_in_offset(0); | |
397 | show_in_offset(1); | |
398 | show_in_offset(2); | |
399 | show_in_offset(3); | |
400 | show_in_offset(4); | |
401 | ||
402 | /* 3 temperatures */ | |
1e71a5a2 JD |
403 | static ssize_t show_temp(struct device *dev, struct device_attribute *da, |
404 | char *buf) { | |
1da177e4 | 405 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
406 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
407 | int nr = attr->index; | |
1da177e4 LT |
408 | return sprintf(buf, "%ld\n", TEMP_FROM_REG10(data->temp[nr])); |
409 | } | |
1e71a5a2 JD |
410 | static ssize_t show_temp_over(struct device *dev, struct device_attribute *da, |
411 | char *buf) { | |
1da177e4 | 412 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
413 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
414 | int nr = attr->index; | |
1da177e4 LT |
415 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_over[nr])); |
416 | } | |
1e71a5a2 JD |
417 | static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da, |
418 | char *buf) { | |
1da177e4 | 419 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
420 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
421 | int nr = attr->index; | |
1da177e4 LT |
422 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp_hyst[nr])); |
423 | } | |
1e71a5a2 JD |
424 | static ssize_t set_temp_over(struct device *dev, struct device_attribute *da, |
425 | const char *buf, size_t count) { | |
2ec342e6 | 426 | struct via686a_data *data = dev_get_drvdata(dev); |
1e71a5a2 JD |
427 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
428 | int nr = attr->index; | |
1da177e4 LT |
429 | int val = simple_strtol(buf, NULL, 10); |
430 | ||
9a61bf63 | 431 | mutex_lock(&data->update_lock); |
1da177e4 | 432 | data->temp_over[nr] = TEMP_TO_REG(val); |
2ec342e6 | 433 | via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr], |
563db2fe | 434 | data->temp_over[nr]); |
9a61bf63 | 435 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
436 | return count; |
437 | } | |
1e71a5a2 JD |
438 | static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da, |
439 | const char *buf, size_t count) { | |
2ec342e6 | 440 | struct via686a_data *data = dev_get_drvdata(dev); |
1e71a5a2 JD |
441 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
442 | int nr = attr->index; | |
1da177e4 LT |
443 | int val = simple_strtol(buf, NULL, 10); |
444 | ||
9a61bf63 | 445 | mutex_lock(&data->update_lock); |
1da177e4 | 446 | data->temp_hyst[nr] = TEMP_TO_REG(val); |
2ec342e6 | 447 | via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr], |
563db2fe | 448 | data->temp_hyst[nr]); |
9a61bf63 | 449 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
450 | return count; |
451 | } | |
452 | #define show_temp_offset(offset) \ | |
1e71a5a2 JD |
453 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ |
454 | show_temp, NULL, offset - 1); \ | |
455 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ | |
456 | show_temp_over, set_temp_over, offset - 1); \ | |
457 | static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ | |
458 | show_temp_hyst, set_temp_hyst, offset - 1); | |
1da177e4 LT |
459 | |
460 | show_temp_offset(1); | |
461 | show_temp_offset(2); | |
462 | show_temp_offset(3); | |
463 | ||
464 | /* 2 Fans */ | |
1e71a5a2 JD |
465 | static ssize_t show_fan(struct device *dev, struct device_attribute *da, |
466 | char *buf) { | |
1da177e4 | 467 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
468 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
469 | int nr = attr->index; | |
be8992c2 | 470 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], |
1da177e4 LT |
471 | DIV_FROM_REG(data->fan_div[nr])) ); |
472 | } | |
1e71a5a2 JD |
473 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *da, |
474 | char *buf) { | |
1da177e4 | 475 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
476 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
477 | int nr = attr->index; | |
be8992c2 | 478 | return sprintf(buf, "%d\n", |
1da177e4 LT |
479 | FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])) ); |
480 | } | |
1e71a5a2 JD |
481 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, |
482 | char *buf) { | |
1da177e4 | 483 | struct via686a_data *data = via686a_update_device(dev); |
1e71a5a2 JD |
484 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
485 | int nr = attr->index; | |
be8992c2 | 486 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) ); |
1da177e4 | 487 | } |
1e71a5a2 JD |
488 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, |
489 | const char *buf, size_t count) { | |
2ec342e6 | 490 | struct via686a_data *data = dev_get_drvdata(dev); |
1e71a5a2 JD |
491 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
492 | int nr = attr->index; | |
1da177e4 LT |
493 | int val = simple_strtol(buf, NULL, 10); |
494 | ||
9a61bf63 | 495 | mutex_lock(&data->update_lock); |
1da177e4 | 496 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
2ec342e6 | 497 | via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]); |
9a61bf63 | 498 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
499 | return count; |
500 | } | |
1e71a5a2 JD |
501 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, |
502 | const char *buf, size_t count) { | |
2ec342e6 | 503 | struct via686a_data *data = dev_get_drvdata(dev); |
1e71a5a2 JD |
504 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); |
505 | int nr = attr->index; | |
1da177e4 LT |
506 | int val = simple_strtol(buf, NULL, 10); |
507 | int old; | |
508 | ||
9a61bf63 | 509 | mutex_lock(&data->update_lock); |
2ec342e6 | 510 | old = via686a_read_value(data, VIA686A_REG_FANDIV); |
1da177e4 LT |
511 | data->fan_div[nr] = DIV_TO_REG(val); |
512 | old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); | |
2ec342e6 | 513 | via686a_write_value(data, VIA686A_REG_FANDIV, old); |
9a61bf63 | 514 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
515 | return count; |
516 | } | |
517 | ||
518 | #define show_fan_offset(offset) \ | |
1e71a5a2 JD |
519 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ |
520 | show_fan, NULL, offset - 1); \ | |
521 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
522 | show_fan_min, set_fan_min, offset - 1); \ | |
523 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
524 | show_fan_div, set_fan_div, offset - 1); | |
1da177e4 LT |
525 | |
526 | show_fan_offset(1); | |
527 | show_fan_offset(2); | |
528 | ||
529 | /* Alarms */ | |
a5099cfc | 530 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) { |
1da177e4 | 531 | struct via686a_data *data = via686a_update_device(dev); |
68188ba7 | 532 | return sprintf(buf, "%u\n", data->alarms); |
1da177e4 | 533 | } |
1d66c64c | 534 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
1da177e4 | 535 | |
2ec342e6 JD |
536 | static ssize_t show_name(struct device *dev, struct device_attribute |
537 | *devattr, char *buf) | |
538 | { | |
539 | struct via686a_data *data = dev_get_drvdata(dev); | |
540 | return sprintf(buf, "%s\n", data->name); | |
541 | } | |
542 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
543 | ||
a5ebe668 | 544 | static struct attribute *via686a_attributes[] = { |
1e71a5a2 JD |
545 | &sensor_dev_attr_in0_input.dev_attr.attr, |
546 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
547 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
548 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
549 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
550 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
551 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
552 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
553 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
554 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
555 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
556 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
557 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
558 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
559 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
560 | ||
561 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
562 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
563 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
564 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
565 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
566 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
567 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
568 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, | |
569 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, | |
570 | ||
571 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
572 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
573 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
574 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
575 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
576 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
a5ebe668 JD |
577 | |
578 | &dev_attr_alarms.attr, | |
2ec342e6 | 579 | &dev_attr_name.attr, |
a5ebe668 JD |
580 | NULL |
581 | }; | |
582 | ||
583 | static const struct attribute_group via686a_group = { | |
584 | .attrs = via686a_attributes, | |
585 | }; | |
586 | ||
2ec342e6 | 587 | static struct platform_driver via686a_driver = { |
cdaf7934 | 588 | .driver = { |
87218842 | 589 | .owner = THIS_MODULE, |
cdaf7934 LR |
590 | .name = "via686a", |
591 | }, | |
2ec342e6 JD |
592 | .probe = via686a_probe, |
593 | .remove = __devexit_p(via686a_remove), | |
1da177e4 LT |
594 | }; |
595 | ||
596 | ||
597 | /* This is called when the module is loaded */ | |
2ec342e6 | 598 | static int __devinit via686a_probe(struct platform_device *pdev) |
1da177e4 | 599 | { |
1da177e4 | 600 | struct via686a_data *data; |
2ec342e6 JD |
601 | struct resource *res; |
602 | int err; | |
1da177e4 LT |
603 | |
604 | /* Reserve the ISA region */ | |
2ec342e6 JD |
605 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
606 | if (!request_region(res->start, VIA686A_EXTENT, | |
cdaf7934 | 607 | via686a_driver.driver.name)) { |
2ec342e6 JD |
608 | dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n", |
609 | (unsigned long)res->start, (unsigned long)res->end); | |
1da177e4 LT |
610 | return -ENODEV; |
611 | } | |
612 | ||
ba9c2e8d | 613 | if (!(data = kzalloc(sizeof(struct via686a_data), GFP_KERNEL))) { |
1da177e4 | 614 | err = -ENOMEM; |
943b0830 | 615 | goto exit_release; |
1da177e4 | 616 | } |
1da177e4 | 617 | |
2ec342e6 JD |
618 | platform_set_drvdata(pdev, data); |
619 | data->addr = res->start; | |
620 | data->name = "via686a"; | |
9a61bf63 | 621 | mutex_init(&data->update_lock); |
be8992c2 | 622 | |
1da177e4 | 623 | /* Initialize the VIA686A chip */ |
2ec342e6 | 624 | via686a_init_device(data); |
1da177e4 LT |
625 | |
626 | /* Register sysfs hooks */ | |
2ec342e6 JD |
627 | if ((err = sysfs_create_group(&pdev->dev.kobj, &via686a_group))) |
628 | goto exit_free; | |
a5ebe668 | 629 | |
1beeffe4 TJ |
630 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
631 | if (IS_ERR(data->hwmon_dev)) { | |
632 | err = PTR_ERR(data->hwmon_dev); | |
a5ebe668 | 633 | goto exit_remove_files; |
943b0830 MH |
634 | } |
635 | ||
1da177e4 LT |
636 | return 0; |
637 | ||
a5ebe668 | 638 | exit_remove_files: |
2ec342e6 | 639 | sysfs_remove_group(&pdev->dev.kobj, &via686a_group); |
943b0830 | 640 | exit_free: |
1da177e4 | 641 | kfree(data); |
943b0830 | 642 | exit_release: |
2ec342e6 | 643 | release_region(res->start, VIA686A_EXTENT); |
1da177e4 LT |
644 | return err; |
645 | } | |
646 | ||
2ec342e6 | 647 | static int __devexit via686a_remove(struct platform_device *pdev) |
1da177e4 | 648 | { |
2ec342e6 | 649 | struct via686a_data *data = platform_get_drvdata(pdev); |
1da177e4 | 650 | |
1beeffe4 | 651 | hwmon_device_unregister(data->hwmon_dev); |
2ec342e6 | 652 | sysfs_remove_group(&pdev->dev.kobj, &via686a_group); |
943b0830 | 653 | |
2ec342e6 JD |
654 | release_region(data->addr, VIA686A_EXTENT); |
655 | platform_set_drvdata(pdev, NULL); | |
943b0830 | 656 | kfree(data); |
1da177e4 LT |
657 | |
658 | return 0; | |
659 | } | |
660 | ||
2ec342e6 | 661 | static void __devinit via686a_init_device(struct via686a_data *data) |
1da177e4 LT |
662 | { |
663 | u8 reg; | |
664 | ||
665 | /* Start monitoring */ | |
2ec342e6 JD |
666 | reg = via686a_read_value(data, VIA686A_REG_CONFIG); |
667 | via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F); | |
1da177e4 LT |
668 | |
669 | /* Configure temp interrupt mode for continuous-interrupt operation */ | |
2ec342e6 JD |
670 | reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE); |
671 | via686a_write_value(data, VIA686A_REG_TEMP_MODE, | |
58fe0809 JD |
672 | (reg & ~VIA686A_TEMP_MODE_MASK) |
673 | | VIA686A_TEMP_MODE_CONTINUOUS); | |
1da177e4 LT |
674 | } |
675 | ||
676 | static struct via686a_data *via686a_update_device(struct device *dev) | |
677 | { | |
2ec342e6 | 678 | struct via686a_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
679 | int i; |
680 | ||
9a61bf63 | 681 | mutex_lock(&data->update_lock); |
1da177e4 LT |
682 | |
683 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
684 | || !data->valid) { | |
685 | for (i = 0; i <= 4; i++) { | |
686 | data->in[i] = | |
2ec342e6 JD |
687 | via686a_read_value(data, VIA686A_REG_IN(i)); |
688 | data->in_min[i] = via686a_read_value(data, | |
1da177e4 LT |
689 | VIA686A_REG_IN_MIN |
690 | (i)); | |
691 | data->in_max[i] = | |
2ec342e6 | 692 | via686a_read_value(data, VIA686A_REG_IN_MAX(i)); |
1da177e4 LT |
693 | } |
694 | for (i = 1; i <= 2; i++) { | |
695 | data->fan[i - 1] = | |
2ec342e6 JD |
696 | via686a_read_value(data, VIA686A_REG_FAN(i)); |
697 | data->fan_min[i - 1] = via686a_read_value(data, | |
1da177e4 LT |
698 | VIA686A_REG_FAN_MIN(i)); |
699 | } | |
700 | for (i = 0; i <= 2; i++) { | |
2ec342e6 | 701 | data->temp[i] = via686a_read_value(data, |
563db2fe | 702 | VIA686A_REG_TEMP[i]) << 2; |
1da177e4 | 703 | data->temp_over[i] = |
2ec342e6 | 704 | via686a_read_value(data, |
563db2fe | 705 | VIA686A_REG_TEMP_OVER[i]); |
1da177e4 | 706 | data->temp_hyst[i] = |
2ec342e6 | 707 | via686a_read_value(data, |
563db2fe | 708 | VIA686A_REG_TEMP_HYST[i]); |
1da177e4 | 709 | } |
be8992c2 | 710 | /* add in lower 2 bits |
1da177e4 LT |
711 | temp1 uses bits 7-6 of VIA686A_REG_TEMP_LOW1 |
712 | temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23 | |
713 | temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23 | |
714 | */ | |
2ec342e6 | 715 | data->temp[0] |= (via686a_read_value(data, |
1da177e4 LT |
716 | VIA686A_REG_TEMP_LOW1) |
717 | & 0xc0) >> 6; | |
718 | data->temp[1] |= | |
2ec342e6 | 719 | (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & |
1da177e4 LT |
720 | 0x30) >> 4; |
721 | data->temp[2] |= | |
2ec342e6 | 722 | (via686a_read_value(data, VIA686A_REG_TEMP_LOW23) & |
1da177e4 LT |
723 | 0xc0) >> 6; |
724 | ||
2ec342e6 | 725 | i = via686a_read_value(data, VIA686A_REG_FANDIV); |
1da177e4 LT |
726 | data->fan_div[0] = (i >> 4) & 0x03; |
727 | data->fan_div[1] = i >> 6; | |
728 | data->alarms = | |
2ec342e6 | 729 | via686a_read_value(data, |
1da177e4 | 730 | VIA686A_REG_ALARM1) | |
2ec342e6 | 731 | (via686a_read_value(data, VIA686A_REG_ALARM2) << 8); |
1da177e4 LT |
732 | data->last_updated = jiffies; |
733 | data->valid = 1; | |
734 | } | |
735 | ||
9a61bf63 | 736 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
737 | |
738 | return data; | |
739 | } | |
740 | ||
741 | static struct pci_device_id via686a_pci_ids[] = { | |
be8992c2 JD |
742 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4) }, |
743 | { 0, } | |
1da177e4 LT |
744 | }; |
745 | ||
746 | MODULE_DEVICE_TABLE(pci, via686a_pci_ids); | |
747 | ||
2ec342e6 JD |
748 | static int __devinit via686a_device_add(unsigned short address) |
749 | { | |
750 | struct resource res = { | |
751 | .start = address, | |
752 | .end = address + VIA686A_EXTENT - 1, | |
753 | .name = "via686a", | |
754 | .flags = IORESOURCE_IO, | |
755 | }; | |
756 | int err; | |
757 | ||
758 | pdev = platform_device_alloc("via686a", address); | |
759 | if (!pdev) { | |
760 | err = -ENOMEM; | |
761 | printk(KERN_ERR "via686a: Device allocation failed\n"); | |
762 | goto exit; | |
763 | } | |
764 | ||
765 | err = platform_device_add_resources(pdev, &res, 1); | |
766 | if (err) { | |
767 | printk(KERN_ERR "via686a: Device resource addition failed " | |
768 | "(%d)\n", err); | |
769 | goto exit_device_put; | |
770 | } | |
771 | ||
772 | err = platform_device_add(pdev); | |
773 | if (err) { | |
774 | printk(KERN_ERR "via686a: Device addition failed (%d)\n", | |
775 | err); | |
776 | goto exit_device_put; | |
777 | } | |
778 | ||
779 | return 0; | |
780 | ||
781 | exit_device_put: | |
782 | platform_device_put(pdev); | |
783 | exit: | |
784 | return err; | |
785 | } | |
786 | ||
1da177e4 | 787 | static int __devinit via686a_pci_probe(struct pci_dev *dev, |
be8992c2 | 788 | const struct pci_device_id *id) |
1da177e4 | 789 | { |
2ec342e6 | 790 | u16 address, val; |
be8992c2 | 791 | |
2ec342e6 JD |
792 | if (force_addr) { |
793 | address = force_addr & ~(VIA686A_EXTENT - 1); | |
794 | dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address); | |
795 | if (PCIBIOS_SUCCESSFUL != | |
796 | pci_write_config_word(dev, VIA686A_BASE_REG, address | 1)) | |
797 | return -ENODEV; | |
798 | } | |
be8992c2 JD |
799 | if (PCIBIOS_SUCCESSFUL != |
800 | pci_read_config_word(dev, VIA686A_BASE_REG, &val)) | |
801 | return -ENODEV; | |
802 | ||
2d8672c5 | 803 | address = val & ~(VIA686A_EXTENT - 1); |
2ec342e6 | 804 | if (address == 0) { |
be8992c2 JD |
805 | dev_err(&dev->dev, "base address not set - upgrade BIOS " |
806 | "or use force_addr=0xaddr\n"); | |
807 | return -ENODEV; | |
808 | } | |
be8992c2 | 809 | |
2ec342e6 JD |
810 | if (PCIBIOS_SUCCESSFUL != |
811 | pci_read_config_word(dev, VIA686A_ENABLE_REG, &val)) | |
812 | return -ENODEV; | |
813 | if (!(val & 0x0001)) { | |
814 | if (!force_addr) { | |
815 | dev_warn(&dev->dev, "Sensors disabled, enable " | |
816 | "with force_addr=0x%x\n", address); | |
817 | return -ENODEV; | |
818 | } | |
819 | ||
820 | dev_warn(&dev->dev, "Enabling sensors\n"); | |
821 | if (PCIBIOS_SUCCESSFUL != | |
822 | pci_write_config_word(dev, VIA686A_ENABLE_REG, | |
823 | val | 0x0001)) | |
824 | return -ENODEV; | |
1da177e4 LT |
825 | } |
826 | ||
2ec342e6 JD |
827 | if (platform_driver_register(&via686a_driver)) |
828 | goto exit; | |
829 | ||
830 | /* Sets global pdev as a side effect */ | |
831 | if (via686a_device_add(address)) | |
832 | goto exit_unregister; | |
833 | ||
1da177e4 LT |
834 | /* Always return failure here. This is to allow other drivers to bind |
835 | * to this pci device. We don't really want to have control over the | |
836 | * pci device, we only wanted to read as few register values from it. | |
837 | */ | |
2ec342e6 JD |
838 | s_bridge = pci_dev_get(dev); |
839 | return -ENODEV; | |
840 | ||
841 | exit_unregister: | |
842 | platform_driver_unregister(&via686a_driver); | |
843 | exit: | |
1da177e4 LT |
844 | return -ENODEV; |
845 | } | |
846 | ||
847 | static struct pci_driver via686a_pci_driver = { | |
be8992c2 JD |
848 | .name = "via686a", |
849 | .id_table = via686a_pci_ids, | |
850 | .probe = via686a_pci_probe, | |
1da177e4 LT |
851 | }; |
852 | ||
853 | static int __init sm_via686a_init(void) | |
854 | { | |
be8992c2 | 855 | return pci_register_driver(&via686a_pci_driver); |
1da177e4 LT |
856 | } |
857 | ||
858 | static void __exit sm_via686a_exit(void) | |
859 | { | |
860 | pci_unregister_driver(&via686a_pci_driver); | |
861 | if (s_bridge != NULL) { | |
2ec342e6 JD |
862 | platform_device_unregister(pdev); |
863 | platform_driver_unregister(&via686a_driver); | |
1da177e4 LT |
864 | pci_dev_put(s_bridge); |
865 | s_bridge = NULL; | |
866 | } | |
867 | } | |
868 | ||
96de0e25 | 869 | MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>, " |
be8992c2 JD |
870 | "Mark Studebaker <mdsxyz123@yahoo.com> " |
871 | "and Bob Dougherty <bobd@stanford.edu>"); | |
1da177e4 LT |
872 | MODULE_DESCRIPTION("VIA 686A Sensor device"); |
873 | MODULE_LICENSE("GPL"); | |
874 | ||
875 | module_init(sm_via686a_init); | |
876 | module_exit(sm_via686a_exit); |