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1de9e371 RL |
1 | /* |
2 | vt8231.c - Part of lm_sensors, Linux kernel modules | |
3 | for hardware monitoring | |
4 | ||
5 | Copyright (c) 2005 Roger Lucas <roger@planbit.co.uk> | |
6 | Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> | |
7 | Aaron M. Marsh <amarsh@sdf.lonestar.org> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | /* Supports VIA VT8231 South Bridge embedded sensors | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/pci.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/i2c.h> | |
33 | #include <linux/i2c-isa.h> | |
34 | #include <linux/hwmon.h> | |
35 | #include <linux/hwmon-sysfs.h> | |
36 | #include <linux/hwmon-vid.h> | |
37 | #include <linux/err.h> | |
9a61bf63 | 38 | #include <linux/mutex.h> |
1de9e371 RL |
39 | #include <asm/io.h> |
40 | ||
41 | static int force_addr; | |
42 | module_param(force_addr, int, 0); | |
43 | MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors"); | |
44 | ||
45 | /* Device address | |
46 | Note that we can't determine the ISA address until we have initialized | |
47 | our module */ | |
48 | static unsigned short isa_address; | |
49 | ||
50 | #define VT8231_EXTENT 0x80 | |
51 | #define VT8231_BASE_REG 0x70 | |
52 | #define VT8231_ENABLE_REG 0x74 | |
53 | ||
54 | /* The VT8231 registers | |
55 | ||
56 | The reset value for the input channel configuration is used (Reg 0x4A=0x07) | |
57 | which sets the selected inputs marked with '*' below if multiple options are | |
58 | possible: | |
59 | ||
60 | Voltage Mode Temperature Mode | |
61 | Sensor Linux Id Linux Id VIA Id | |
62 | -------- -------- -------- ------ | |
63 | CPU Diode N/A temp1 0 | |
64 | UIC1 in0 temp2 * 1 | |
65 | UIC2 in1 * temp3 2 | |
66 | UIC3 in2 * temp4 3 | |
67 | UIC4 in3 * temp5 4 | |
68 | UIC5 in4 * temp6 5 | |
69 | 3.3V in5 N/A | |
70 | ||
71 | Note that the BIOS may set the configuration register to a different value | |
72 | to match the motherboard configuration. | |
73 | */ | |
74 | ||
75 | /* fans numbered 0-1 */ | |
76 | #define VT8231_REG_FAN_MIN(nr) (0x3b + (nr)) | |
77 | #define VT8231_REG_FAN(nr) (0x29 + (nr)) | |
78 | ||
79 | /* Voltage inputs numbered 0-5 */ | |
80 | ||
81 | static const u8 regvolt[] = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 }; | |
82 | static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 }; | |
83 | static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 }; | |
84 | ||
85 | /* Temperatures are numbered 1-6 according to the Linux kernel specification. | |
86 | ** | |
87 | ** In the VIA datasheet, however, the temperatures are numbered from zero. | |
88 | ** Since it is important that this driver can easily be compared to the VIA | |
89 | ** datasheet, we will use the VIA numbering within this driver and map the | |
90 | ** kernel sysfs device name to the VIA number in the sysfs callback. | |
91 | */ | |
92 | ||
93 | #define VT8231_REG_TEMP_LOW01 0x49 | |
94 | #define VT8231_REG_TEMP_LOW25 0x4d | |
95 | ||
96 | static const u8 regtemp[] = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 }; | |
97 | static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 }; | |
98 | static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 }; | |
99 | ||
100 | #define TEMP_FROM_REG(reg) (((253 * 4 - (reg)) * 550 + 105) / 210) | |
101 | #define TEMP_MAXMIN_FROM_REG(reg) (((253 - (reg)) * 2200 + 105) / 210) | |
102 | #define TEMP_MAXMIN_TO_REG(val) (253 - ((val) * 210 + 1100) / 2200) | |
103 | ||
104 | #define VT8231_REG_CONFIG 0x40 | |
105 | #define VT8231_REG_ALARM1 0x41 | |
106 | #define VT8231_REG_ALARM2 0x42 | |
107 | #define VT8231_REG_FANDIV 0x47 | |
108 | #define VT8231_REG_UCH_CONFIG 0x4a | |
109 | #define VT8231_REG_TEMP1_CONFIG 0x4b | |
110 | #define VT8231_REG_TEMP2_CONFIG 0x4c | |
111 | ||
112 | /* temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux | |
113 | ** numbering | |
114 | */ | |
115 | #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \ | |
116 | ((ch_config) >> ((i)+1)) & 0x01) | |
117 | /* voltages 0-5 */ | |
118 | #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \ | |
119 | !(((ch_config) >> ((i)+2)) & 0x01)) | |
120 | ||
121 | #define DIV_FROM_REG(val) (1 << (val)) | |
122 | ||
123 | /* NB The values returned here are NOT temperatures. The calibration curves | |
124 | ** for the thermistor curves are board-specific and must go in the | |
125 | ** sensors.conf file. Temperature sensors are actually ten bits, but the | |
126 | ** VIA datasheet only considers the 8 MSBs obtained from the regtemp[] | |
127 | ** register. The temperature value returned should have a magnitude of 3, | |
128 | ** so we use the VIA scaling as the "true" scaling and use the remaining 2 | |
129 | ** LSBs as fractional precision. | |
130 | ** | |
131 | ** All the on-chip hardware temperature comparisons for the alarms are only | |
132 | ** 8-bits wide, and compare against the 8 MSBs of the temperature. The bits | |
133 | ** in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are | |
134 | ** ignored. | |
135 | */ | |
136 | ||
137 | /******** FAN RPM CONVERSIONS ******** | |
138 | ** This chip saturates back at 0, not at 255 like many the other chips. | |
139 | ** So, 0 means 0 RPM | |
140 | */ | |
141 | static inline u8 FAN_TO_REG(long rpm, int div) | |
142 | { | |
143 | if (rpm == 0) | |
144 | return 0; | |
145 | return SENSORS_LIMIT(1310720 / (rpm * div), 1, 255); | |
146 | } | |
147 | ||
148 | #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div))) | |
149 | ||
150 | struct vt8231_data { | |
151 | struct i2c_client client; | |
9a61bf63 | 152 | struct mutex update_lock; |
1de9e371 RL |
153 | struct class_device *class_dev; |
154 | char valid; /* !=0 if following fields are valid */ | |
155 | unsigned long last_updated; /* In jiffies */ | |
156 | ||
157 | u8 in[6]; /* Register value */ | |
158 | u8 in_max[6]; /* Register value */ | |
159 | u8 in_min[6]; /* Register value */ | |
160 | u16 temp[6]; /* Register value 10 bit, right aligned */ | |
161 | u8 temp_max[6]; /* Register value */ | |
162 | u8 temp_min[6]; /* Register value */ | |
163 | u8 fan[2]; /* Register value */ | |
164 | u8 fan_min[2]; /* Register value */ | |
165 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
166 | u16 alarms; /* Register encoding */ | |
167 | u8 uch_config; | |
168 | }; | |
169 | ||
170 | static struct pci_dev *s_bridge; | |
171 | static int vt8231_detect(struct i2c_adapter *adapter); | |
172 | static int vt8231_detach_client(struct i2c_client *client); | |
173 | static struct vt8231_data *vt8231_update_device(struct device *dev); | |
174 | static void vt8231_init_client(struct i2c_client *client); | |
175 | ||
176 | static inline int vt8231_read_value(struct i2c_client *client, u8 reg) | |
177 | { | |
178 | return inb_p(client->addr + reg); | |
179 | } | |
180 | ||
181 | static inline void vt8231_write_value(struct i2c_client *client, u8 reg, | |
182 | u8 value) | |
183 | { | |
184 | outb_p(value, client->addr + reg); | |
185 | } | |
186 | ||
187 | /* following are the sysfs callback functions */ | |
188 | static ssize_t show_in(struct device *dev, struct device_attribute *attr, | |
189 | char *buf) | |
190 | { | |
191 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
192 | int nr = sensor_attr->index; | |
193 | struct vt8231_data *data = vt8231_update_device(dev); | |
194 | ||
195 | return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958); | |
196 | } | |
197 | ||
198 | static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, | |
199 | char *buf) | |
200 | { | |
201 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
202 | int nr = sensor_attr->index; | |
203 | struct vt8231_data *data = vt8231_update_device(dev); | |
204 | ||
205 | return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958); | |
206 | } | |
207 | ||
208 | static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, | |
209 | char *buf) | |
210 | { | |
211 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
212 | int nr = sensor_attr->index; | |
213 | struct vt8231_data *data = vt8231_update_device(dev); | |
214 | ||
215 | return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958)); | |
216 | } | |
217 | ||
218 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, | |
219 | const char *buf, size_t count) | |
220 | { | |
221 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
222 | int nr = sensor_attr->index; | |
223 | struct i2c_client *client = to_i2c_client(dev); | |
224 | struct vt8231_data *data = i2c_get_clientdata(client); | |
225 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
226 | ||
9a61bf63 | 227 | mutex_lock(&data->update_lock); |
1de9e371 RL |
228 | data->in_min[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); |
229 | vt8231_write_value(client, regvoltmin[nr], data->in_min[nr]); | |
9a61bf63 | 230 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
231 | return count; |
232 | } | |
233 | ||
234 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, | |
235 | const char *buf, size_t count) | |
236 | { | |
237 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
238 | int nr = sensor_attr->index; | |
239 | struct i2c_client *client = to_i2c_client(dev); | |
240 | struct vt8231_data *data = i2c_get_clientdata(client); | |
241 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
242 | ||
9a61bf63 | 243 | mutex_lock(&data->update_lock); |
1de9e371 RL |
244 | data->in_max[nr] = SENSORS_LIMIT(((val * 958) / 10000) + 3, 0, 255); |
245 | vt8231_write_value(client, regvoltmax[nr], data->in_max[nr]); | |
9a61bf63 | 246 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
247 | return count; |
248 | } | |
249 | ||
250 | /* Special case for input 5 as this has 3.3V scaling built into the chip */ | |
251 | static ssize_t show_in5(struct device *dev, struct device_attribute *attr, | |
252 | char *buf) | |
253 | { | |
254 | struct vt8231_data *data = vt8231_update_device(dev); | |
255 | ||
256 | return sprintf(buf, "%d\n", | |
257 | (((data->in[5] - 3) * 10000 * 54) / (958 * 34))); | |
258 | } | |
259 | ||
260 | static ssize_t show_in5_min(struct device *dev, struct device_attribute *attr, | |
261 | char *buf) | |
262 | { | |
263 | struct vt8231_data *data = vt8231_update_device(dev); | |
264 | ||
265 | return sprintf(buf, "%d\n", | |
266 | (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34))); | |
267 | } | |
268 | ||
269 | static ssize_t show_in5_max(struct device *dev, struct device_attribute *attr, | |
270 | char *buf) | |
271 | { | |
272 | struct vt8231_data *data = vt8231_update_device(dev); | |
273 | ||
274 | return sprintf(buf, "%d\n", | |
275 | (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34))); | |
276 | } | |
277 | ||
278 | static ssize_t set_in5_min(struct device *dev, struct device_attribute *attr, | |
279 | const char *buf, size_t count) | |
280 | { | |
281 | struct i2c_client *client = to_i2c_client(dev); | |
282 | struct vt8231_data *data = i2c_get_clientdata(client); | |
283 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
284 | ||
9a61bf63 | 285 | mutex_lock(&data->update_lock); |
1de9e371 RL |
286 | data->in_min[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, |
287 | 0, 255); | |
288 | vt8231_write_value(client, regvoltmin[5], data->in_min[5]); | |
9a61bf63 | 289 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
290 | return count; |
291 | } | |
292 | ||
293 | static ssize_t set_in5_max(struct device *dev, struct device_attribute *attr, | |
294 | const char *buf, size_t count) | |
295 | { | |
296 | struct i2c_client *client = to_i2c_client(dev); | |
297 | struct vt8231_data *data = i2c_get_clientdata(client); | |
298 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
299 | ||
9a61bf63 | 300 | mutex_lock(&data->update_lock); |
1de9e371 RL |
301 | data->in_max[5] = SENSORS_LIMIT(((val * 958 * 34) / (10000 * 54)) + 3, |
302 | 0, 255); | |
303 | vt8231_write_value(client, regvoltmax[5], data->in_max[5]); | |
9a61bf63 | 304 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
305 | return count; |
306 | } | |
307 | ||
308 | #define define_voltage_sysfs(offset) \ | |
309 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ | |
310 | show_in, NULL, offset); \ | |
311 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ | |
312 | show_in_min, set_in_min, offset); \ | |
313 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ | |
314 | show_in_max, set_in_max, offset) | |
315 | ||
316 | define_voltage_sysfs(0); | |
317 | define_voltage_sysfs(1); | |
318 | define_voltage_sysfs(2); | |
319 | define_voltage_sysfs(3); | |
320 | define_voltage_sysfs(4); | |
321 | ||
322 | static DEVICE_ATTR(in5_input, S_IRUGO, show_in5, NULL); | |
323 | static DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR, show_in5_min, set_in5_min); | |
324 | static DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR, show_in5_max, set_in5_max); | |
325 | ||
326 | /* Temperatures */ | |
327 | static ssize_t show_temp0(struct device *dev, struct device_attribute *attr, | |
328 | char *buf) | |
329 | { | |
330 | struct vt8231_data *data = vt8231_update_device(dev); | |
331 | return sprintf(buf, "%d\n", data->temp[0] * 250); | |
332 | } | |
333 | ||
334 | static ssize_t show_temp0_max(struct device *dev, struct device_attribute *attr, | |
335 | char *buf) | |
336 | { | |
337 | struct vt8231_data *data = vt8231_update_device(dev); | |
338 | return sprintf(buf, "%d\n", data->temp_max[0] * 1000); | |
339 | } | |
340 | ||
341 | static ssize_t show_temp0_min(struct device *dev, struct device_attribute *attr, | |
342 | char *buf) | |
343 | { | |
344 | struct vt8231_data *data = vt8231_update_device(dev); | |
345 | return sprintf(buf, "%d\n", data->temp_min[0] * 1000); | |
346 | } | |
347 | ||
348 | static ssize_t set_temp0_max(struct device *dev, struct device_attribute *attr, | |
349 | const char *buf, size_t count) | |
350 | { | |
351 | struct i2c_client *client = to_i2c_client(dev); | |
352 | struct vt8231_data *data = i2c_get_clientdata(client); | |
353 | int val = simple_strtol(buf, NULL, 10); | |
354 | ||
9a61bf63 | 355 | mutex_lock(&data->update_lock); |
1de9e371 RL |
356 | data->temp_max[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); |
357 | vt8231_write_value(client, regtempmax[0], data->temp_max[0]); | |
9a61bf63 | 358 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
359 | return count; |
360 | } | |
361 | static ssize_t set_temp0_min(struct device *dev, struct device_attribute *attr, | |
362 | const char *buf, size_t count) | |
363 | { | |
364 | struct i2c_client *client = to_i2c_client(dev); | |
365 | struct vt8231_data *data = i2c_get_clientdata(client); | |
366 | int val = simple_strtol(buf, NULL, 10); | |
367 | ||
9a61bf63 | 368 | mutex_lock(&data->update_lock); |
1de9e371 RL |
369 | data->temp_min[0] = SENSORS_LIMIT((val + 500) / 1000, 0, 255); |
370 | vt8231_write_value(client, regtempmin[0], data->temp_min[0]); | |
9a61bf63 | 371 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
372 | return count; |
373 | } | |
374 | ||
375 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, | |
376 | char *buf) | |
377 | { | |
378 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
379 | int nr = sensor_attr->index; | |
380 | struct vt8231_data *data = vt8231_update_device(dev); | |
381 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); | |
382 | } | |
383 | ||
384 | static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, | |
385 | char *buf) | |
386 | { | |
387 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
388 | int nr = sensor_attr->index; | |
389 | struct vt8231_data *data = vt8231_update_device(dev); | |
390 | return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr])); | |
391 | } | |
392 | ||
393 | static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, | |
394 | char *buf) | |
395 | { | |
396 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
397 | int nr = sensor_attr->index; | |
398 | struct vt8231_data *data = vt8231_update_device(dev); | |
399 | return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr])); | |
400 | } | |
401 | ||
402 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
403 | const char *buf, size_t count) | |
404 | { | |
405 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
406 | int nr = sensor_attr->index; | |
407 | struct i2c_client *client = to_i2c_client(dev); | |
408 | struct vt8231_data *data = i2c_get_clientdata(client); | |
409 | int val = simple_strtol(buf, NULL, 10); | |
410 | ||
9a61bf63 | 411 | mutex_lock(&data->update_lock); |
1de9e371 RL |
412 | data->temp_max[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); |
413 | vt8231_write_value(client, regtempmax[nr], data->temp_max[nr]); | |
9a61bf63 | 414 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
415 | return count; |
416 | } | |
417 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, | |
418 | const char *buf, size_t count) | |
419 | { | |
420 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
421 | int nr = sensor_attr->index; | |
422 | struct i2c_client *client = to_i2c_client(dev); | |
423 | struct vt8231_data *data = i2c_get_clientdata(client); | |
424 | int val = simple_strtol(buf, NULL, 10); | |
425 | ||
9a61bf63 | 426 | mutex_lock(&data->update_lock); |
1de9e371 RL |
427 | data->temp_min[nr] = SENSORS_LIMIT(TEMP_MAXMIN_TO_REG(val), 0, 255); |
428 | vt8231_write_value(client, regtempmin[nr], data->temp_min[nr]); | |
9a61bf63 | 429 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
430 | return count; |
431 | } | |
432 | ||
433 | /* Note that these map the Linux temperature sensor numbering (1-6) to the VIA | |
434 | ** temperature sensor numbering (0-5) | |
435 | */ | |
436 | #define define_temperature_sysfs(offset) \ | |
437 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ | |
438 | show_temp, NULL, offset - 1); \ | |
439 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ | |
440 | show_temp_max, set_temp_max, offset - 1); \ | |
e3efa5a7 | 441 | static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \ |
1de9e371 RL |
442 | show_temp_min, set_temp_min, offset - 1) |
443 | ||
444 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp0, NULL); | |
445 | static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp0_max, set_temp0_max); | |
e3efa5a7 | 446 | static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, show_temp0_min, set_temp0_min); |
1de9e371 RL |
447 | |
448 | define_temperature_sysfs(2); | |
449 | define_temperature_sysfs(3); | |
450 | define_temperature_sysfs(4); | |
451 | define_temperature_sysfs(5); | |
452 | define_temperature_sysfs(6); | |
453 | ||
1de9e371 RL |
454 | /* Fans */ |
455 | static ssize_t show_fan(struct device *dev, struct device_attribute *attr, | |
456 | char *buf) | |
457 | { | |
458 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
459 | int nr = sensor_attr->index; | |
460 | struct vt8231_data *data = vt8231_update_device(dev); | |
461 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], | |
462 | DIV_FROM_REG(data->fan_div[nr]))); | |
463 | } | |
464 | ||
465 | static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, | |
466 | char *buf) | |
467 | { | |
468 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
469 | int nr = sensor_attr->index; | |
470 | struct vt8231_data *data = vt8231_update_device(dev); | |
471 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], | |
472 | DIV_FROM_REG(data->fan_div[nr]))); | |
473 | } | |
474 | ||
475 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, | |
476 | char *buf) | |
477 | { | |
478 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
479 | int nr = sensor_attr->index; | |
480 | struct vt8231_data *data = vt8231_update_device(dev); | |
481 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); | |
482 | } | |
483 | ||
484 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, | |
485 | const char *buf, size_t count) | |
486 | { | |
487 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
488 | int nr = sensor_attr->index; | |
489 | struct i2c_client *client = to_i2c_client(dev); | |
490 | struct vt8231_data *data = i2c_get_clientdata(client); | |
491 | int val = simple_strtoul(buf, NULL, 10); | |
492 | ||
9a61bf63 | 493 | mutex_lock(&data->update_lock); |
1de9e371 RL |
494 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); |
495 | vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); | |
9a61bf63 | 496 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
497 | return count; |
498 | } | |
499 | ||
500 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, | |
501 | const char *buf, size_t count) | |
502 | { | |
503 | struct i2c_client *client = to_i2c_client(dev); | |
504 | struct vt8231_data *data = i2c_get_clientdata(client); | |
505 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
506 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
507 | int nr = sensor_attr->index; | |
508 | int old = vt8231_read_value(client, VT8231_REG_FANDIV); | |
509 | long min = FAN_FROM_REG(data->fan_min[nr], | |
510 | DIV_FROM_REG(data->fan_div[nr])); | |
511 | ||
9a61bf63 | 512 | mutex_lock(&data->update_lock); |
1de9e371 RL |
513 | switch (val) { |
514 | case 1: data->fan_div[nr] = 0; break; | |
515 | case 2: data->fan_div[nr] = 1; break; | |
516 | case 4: data->fan_div[nr] = 2; break; | |
517 | case 8: data->fan_div[nr] = 3; break; | |
518 | default: | |
519 | dev_err(&client->dev, "fan_div value %ld not supported." | |
520 | "Choose one of 1, 2, 4 or 8!\n", val); | |
9a61bf63 | 521 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
522 | return -EINVAL; |
523 | } | |
524 | ||
525 | /* Correct the fan minimum speed */ | |
526 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
527 | vt8231_write_value(client, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]); | |
528 | ||
529 | old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4); | |
530 | vt8231_write_value(client, VT8231_REG_FANDIV, old); | |
9a61bf63 | 531 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
532 | return count; |
533 | } | |
534 | ||
535 | ||
536 | #define define_fan_sysfs(offset) \ | |
537 | static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ | |
538 | show_fan, NULL, offset - 1); \ | |
539 | static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ | |
540 | show_fan_div, set_fan_div, offset - 1); \ | |
541 | static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ | |
542 | show_fan_min, set_fan_min, offset - 1) | |
543 | ||
544 | define_fan_sysfs(1); | |
545 | define_fan_sysfs(2); | |
546 | ||
547 | /* Alarms */ | |
548 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, | |
549 | char *buf) | |
550 | { | |
551 | struct vt8231_data *data = vt8231_update_device(dev); | |
552 | return sprintf(buf, "%d\n", data->alarms); | |
553 | } | |
554 | ||
555 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
556 | ||
cbeeb5b7 RL |
557 | static struct attribute *vt8231_attributes_temps[6][4] = { |
558 | { | |
559 | &dev_attr_temp1_input.attr, | |
560 | &dev_attr_temp1_max_hyst.attr, | |
561 | &dev_attr_temp1_max.attr, | |
562 | NULL | |
563 | }, { | |
564 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
565 | &sensor_dev_attr_temp2_max_hyst.dev_attr.attr, | |
566 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
567 | NULL | |
568 | }, { | |
569 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
570 | &sensor_dev_attr_temp3_max_hyst.dev_attr.attr, | |
571 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
572 | NULL | |
573 | }, { | |
574 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
575 | &sensor_dev_attr_temp4_max_hyst.dev_attr.attr, | |
576 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
577 | NULL | |
578 | }, { | |
579 | &sensor_dev_attr_temp5_input.dev_attr.attr, | |
580 | &sensor_dev_attr_temp5_max_hyst.dev_attr.attr, | |
581 | &sensor_dev_attr_temp5_max.dev_attr.attr, | |
582 | NULL | |
583 | }, { | |
584 | &sensor_dev_attr_temp6_input.dev_attr.attr, | |
585 | &sensor_dev_attr_temp6_max_hyst.dev_attr.attr, | |
586 | &sensor_dev_attr_temp6_max.dev_attr.attr, | |
587 | NULL | |
588 | } | |
589 | }; | |
590 | ||
591 | static const struct attribute_group vt8231_group_temps[6] = { | |
592 | { .attrs = vt8231_attributes_temps[0] }, | |
593 | { .attrs = vt8231_attributes_temps[1] }, | |
594 | { .attrs = vt8231_attributes_temps[2] }, | |
595 | { .attrs = vt8231_attributes_temps[3] }, | |
596 | { .attrs = vt8231_attributes_temps[4] }, | |
597 | { .attrs = vt8231_attributes_temps[5] }, | |
598 | }; | |
599 | ||
600 | static struct attribute *vt8231_attributes_volts[6][4] = { | |
601 | { | |
602 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
603 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
604 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
605 | NULL | |
606 | }, { | |
607 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
608 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
609 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
610 | NULL | |
611 | }, { | |
612 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
613 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
614 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
615 | NULL | |
616 | }, { | |
617 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
618 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
619 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
620 | NULL | |
621 | }, { | |
622 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
623 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
624 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
625 | NULL | |
626 | }, { | |
627 | &dev_attr_in5_input.attr, | |
628 | &dev_attr_in5_min.attr, | |
629 | &dev_attr_in5_max.attr, | |
630 | NULL | |
631 | } | |
632 | }; | |
633 | ||
634 | static const struct attribute_group vt8231_group_volts[6] = { | |
635 | { .attrs = vt8231_attributes_volts[0] }, | |
636 | { .attrs = vt8231_attributes_volts[1] }, | |
637 | { .attrs = vt8231_attributes_volts[2] }, | |
638 | { .attrs = vt8231_attributes_volts[3] }, | |
639 | { .attrs = vt8231_attributes_volts[4] }, | |
640 | { .attrs = vt8231_attributes_volts[5] }, | |
641 | }; | |
642 | ||
643 | static struct attribute *vt8231_attributes[] = { | |
644 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
645 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
646 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
647 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
648 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
649 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
650 | &dev_attr_alarms.attr, | |
651 | NULL | |
652 | }; | |
653 | ||
654 | static const struct attribute_group vt8231_group = { | |
655 | .attrs = vt8231_attributes, | |
656 | }; | |
657 | ||
1de9e371 | 658 | static struct i2c_driver vt8231_driver = { |
cdaf7934 | 659 | .driver = { |
87218842 | 660 | .owner = THIS_MODULE, |
cdaf7934 LR |
661 | .name = "vt8231", |
662 | }, | |
1de9e371 RL |
663 | .attach_adapter = vt8231_detect, |
664 | .detach_client = vt8231_detach_client, | |
665 | }; | |
666 | ||
667 | static struct pci_device_id vt8231_pci_ids[] = { | |
668 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) }, | |
669 | { 0, } | |
670 | }; | |
671 | ||
672 | MODULE_DEVICE_TABLE(pci, vt8231_pci_ids); | |
673 | ||
674 | static int __devinit vt8231_pci_probe(struct pci_dev *dev, | |
675 | const struct pci_device_id *id); | |
676 | ||
677 | static struct pci_driver vt8231_pci_driver = { | |
678 | .name = "vt8231", | |
679 | .id_table = vt8231_pci_ids, | |
680 | .probe = vt8231_pci_probe, | |
681 | }; | |
682 | ||
683 | int vt8231_detect(struct i2c_adapter *adapter) | |
684 | { | |
685 | struct i2c_client *client; | |
686 | struct vt8231_data *data; | |
687 | int err = 0, i; | |
688 | u16 val; | |
689 | ||
690 | /* 8231 requires multiple of 256 */ | |
691 | if (force_addr) { | |
692 | isa_address = force_addr & 0xFF00; | |
693 | dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n", | |
694 | isa_address); | |
695 | if (PCIBIOS_SUCCESSFUL != pci_write_config_word(s_bridge, | |
696 | VT8231_BASE_REG, isa_address)) | |
697 | return -ENODEV; | |
698 | } | |
699 | ||
700 | if (PCIBIOS_SUCCESSFUL != | |
701 | pci_read_config_word(s_bridge, VT8231_ENABLE_REG, &val)) | |
702 | return -ENODEV; | |
703 | ||
704 | if (!(val & 0x0001)) { | |
705 | dev_warn(&adapter->dev, "enabling sensors\n"); | |
706 | if (PCIBIOS_SUCCESSFUL != | |
707 | pci_write_config_word(s_bridge, VT8231_ENABLE_REG, | |
708 | val | 0x0001)) | |
709 | return -ENODEV; | |
710 | } | |
711 | ||
712 | /* Reserve the ISA region */ | |
713 | if (!request_region(isa_address, VT8231_EXTENT, | |
714 | vt8231_pci_driver.name)) { | |
715 | dev_err(&adapter->dev, "region 0x%x already in use!\n", | |
716 | isa_address); | |
717 | return -ENODEV; | |
718 | } | |
719 | ||
720 | if (!(data = kzalloc(sizeof(struct vt8231_data), GFP_KERNEL))) { | |
721 | err = -ENOMEM; | |
722 | goto exit_release; | |
723 | } | |
724 | ||
725 | client = &data->client; | |
726 | i2c_set_clientdata(client, data); | |
727 | client->addr = isa_address; | |
728 | client->adapter = adapter; | |
729 | client->driver = &vt8231_driver; | |
730 | client->dev.parent = &adapter->dev; | |
731 | ||
732 | /* Fill in the remaining client fields and put into the global list */ | |
733 | strlcpy(client->name, "vt8231", I2C_NAME_SIZE); | |
734 | ||
9a61bf63 | 735 | mutex_init(&data->update_lock); |
1de9e371 RL |
736 | |
737 | /* Tell the I2C layer a new client has arrived */ | |
738 | if ((err = i2c_attach_client(client))) | |
739 | goto exit_free; | |
740 | ||
741 | vt8231_init_client(client); | |
742 | ||
743 | /* Register sysfs hooks */ | |
cbeeb5b7 | 744 | if ((err = sysfs_create_group(&client->dev.kobj, &vt8231_group))) |
1de9e371 | 745 | goto exit_detach; |
1de9e371 RL |
746 | |
747 | /* Must update device information to find out the config field */ | |
748 | data->uch_config = vt8231_read_value(client, VT8231_REG_UCH_CONFIG); | |
749 | ||
cbeeb5b7 | 750 | for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) { |
1de9e371 | 751 | if (ISTEMP(i, data->uch_config)) { |
cbeeb5b7 RL |
752 | if ((err = sysfs_create_group(&client->dev.kobj, |
753 | &vt8231_group_temps[i]))) | |
754 | goto exit_remove_files; | |
1de9e371 RL |
755 | } |
756 | } | |
757 | ||
cbeeb5b7 | 758 | for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) { |
1de9e371 | 759 | if (ISVOLT(i, data->uch_config)) { |
cbeeb5b7 RL |
760 | if ((err = sysfs_create_group(&client->dev.kobj, |
761 | &vt8231_group_volts[i]))) | |
762 | goto exit_remove_files; | |
1de9e371 RL |
763 | } |
764 | } | |
765 | ||
cbeeb5b7 RL |
766 | data->class_dev = hwmon_device_register(&client->dev); |
767 | if (IS_ERR(data->class_dev)) { | |
768 | err = PTR_ERR(data->class_dev); | |
769 | goto exit_remove_files; | |
770 | } | |
1de9e371 RL |
771 | return 0; |
772 | ||
cbeeb5b7 RL |
773 | exit_remove_files: |
774 | for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) | |
775 | sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]); | |
776 | ||
777 | for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) | |
778 | sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]); | |
779 | ||
780 | sysfs_remove_group(&client->dev.kobj, &vt8231_group); | |
1de9e371 RL |
781 | exit_detach: |
782 | i2c_detach_client(client); | |
783 | exit_free: | |
784 | kfree(data); | |
785 | exit_release: | |
786 | release_region(isa_address, VT8231_EXTENT); | |
787 | return err; | |
788 | } | |
789 | ||
790 | static int vt8231_detach_client(struct i2c_client *client) | |
791 | { | |
792 | struct vt8231_data *data = i2c_get_clientdata(client); | |
cbeeb5b7 | 793 | int err, i; |
1de9e371 RL |
794 | |
795 | hwmon_device_unregister(data->class_dev); | |
796 | ||
cbeeb5b7 RL |
797 | for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) |
798 | sysfs_remove_group(&client->dev.kobj, &vt8231_group_volts[i]); | |
799 | ||
800 | for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) | |
801 | sysfs_remove_group(&client->dev.kobj, &vt8231_group_temps[i]); | |
802 | ||
803 | sysfs_remove_group(&client->dev.kobj, &vt8231_group); | |
804 | ||
1de9e371 RL |
805 | if ((err = i2c_detach_client(client))) { |
806 | return err; | |
807 | } | |
808 | ||
809 | release_region(client->addr, VT8231_EXTENT); | |
810 | kfree(data); | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | static void vt8231_init_client(struct i2c_client *client) | |
816 | { | |
817 | vt8231_write_value(client, VT8231_REG_TEMP1_CONFIG, 0); | |
818 | vt8231_write_value(client, VT8231_REG_TEMP2_CONFIG, 0); | |
819 | } | |
820 | ||
821 | static struct vt8231_data *vt8231_update_device(struct device *dev) | |
822 | { | |
823 | struct i2c_client *client = to_i2c_client(dev); | |
824 | struct vt8231_data *data = i2c_get_clientdata(client); | |
825 | int i; | |
826 | u16 low; | |
827 | ||
9a61bf63 | 828 | mutex_lock(&data->update_lock); |
1de9e371 RL |
829 | |
830 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
831 | || !data->valid) { | |
832 | for (i = 0; i < 6; i++) { | |
833 | if (ISVOLT(i, data->uch_config)) { | |
834 | data->in[i] = vt8231_read_value(client, | |
835 | regvolt[i]); | |
836 | data->in_min[i] = vt8231_read_value(client, | |
837 | regvoltmin[i]); | |
838 | data->in_max[i] = vt8231_read_value(client, | |
839 | regvoltmax[i]); | |
840 | } | |
841 | } | |
842 | for (i = 0; i < 2; i++) { | |
843 | data->fan[i] = vt8231_read_value(client, | |
844 | VT8231_REG_FAN(i)); | |
845 | data->fan_min[i] = vt8231_read_value(client, | |
846 | VT8231_REG_FAN_MIN(i)); | |
847 | } | |
848 | ||
849 | low = vt8231_read_value(client, VT8231_REG_TEMP_LOW01); | |
850 | low = (low >> 6) | ((low & 0x30) >> 2) | |
851 | | (vt8231_read_value(client, VT8231_REG_TEMP_LOW25) << 4); | |
852 | for (i = 0; i < 6; i++) { | |
853 | if (ISTEMP(i, data->uch_config)) { | |
854 | data->temp[i] = (vt8231_read_value(client, | |
855 | regtemp[i]) << 2) | |
856 | | ((low >> (2 * i)) & 0x03); | |
857 | data->temp_max[i] = vt8231_read_value(client, | |
858 | regtempmax[i]); | |
859 | data->temp_min[i] = vt8231_read_value(client, | |
860 | regtempmin[i]); | |
861 | } | |
862 | } | |
863 | ||
864 | i = vt8231_read_value(client, VT8231_REG_FANDIV); | |
865 | data->fan_div[0] = (i >> 4) & 0x03; | |
866 | data->fan_div[1] = i >> 6; | |
867 | data->alarms = vt8231_read_value(client, VT8231_REG_ALARM1) | | |
868 | (vt8231_read_value(client, VT8231_REG_ALARM2) << 8); | |
869 | ||
870 | /* Set alarm flags correctly */ | |
871 | if (!data->fan[0] && data->fan_min[0]) { | |
872 | data->alarms |= 0x40; | |
873 | } else if (data->fan[0] && !data->fan_min[0]) { | |
874 | data->alarms &= ~0x40; | |
875 | } | |
876 | ||
877 | if (!data->fan[1] && data->fan_min[1]) { | |
878 | data->alarms |= 0x80; | |
879 | } else if (data->fan[1] && !data->fan_min[1]) { | |
880 | data->alarms &= ~0x80; | |
881 | } | |
882 | ||
883 | data->last_updated = jiffies; | |
884 | data->valid = 1; | |
885 | } | |
886 | ||
9a61bf63 | 887 | mutex_unlock(&data->update_lock); |
1de9e371 RL |
888 | |
889 | return data; | |
890 | } | |
891 | ||
892 | static int __devinit vt8231_pci_probe(struct pci_dev *dev, | |
893 | const struct pci_device_id *id) | |
894 | { | |
895 | u16 val; | |
896 | ||
897 | if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG, | |
898 | &val)) | |
899 | return -ENODEV; | |
900 | ||
901 | isa_address = val & ~(VT8231_EXTENT - 1); | |
902 | if (isa_address == 0 && force_addr == 0) { | |
903 | dev_err(&dev->dev, "base address not set -\ | |
904 | upgrade BIOS or use force_addr=0xaddr\n"); | |
905 | return -ENODEV; | |
906 | } | |
907 | ||
908 | s_bridge = pci_dev_get(dev); | |
909 | ||
910 | if (i2c_isa_add_driver(&vt8231_driver)) { | |
911 | pci_dev_put(s_bridge); | |
912 | s_bridge = NULL; | |
913 | } | |
914 | ||
915 | /* Always return failure here. This is to allow other drivers to bind | |
916 | * to this pci device. We don't really want to have control over the | |
917 | * pci device, we only wanted to read as few register values from it. | |
918 | */ | |
919 | return -ENODEV; | |
920 | } | |
921 | ||
922 | static int __init sm_vt8231_init(void) | |
923 | { | |
93b47684 | 924 | return pci_register_driver(&vt8231_pci_driver); |
1de9e371 RL |
925 | } |
926 | ||
927 | static void __exit sm_vt8231_exit(void) | |
928 | { | |
929 | pci_unregister_driver(&vt8231_pci_driver); | |
930 | if (s_bridge != NULL) { | |
931 | i2c_isa_del_driver(&vt8231_driver); | |
932 | pci_dev_put(s_bridge); | |
933 | s_bridge = NULL; | |
934 | } | |
935 | } | |
936 | ||
937 | MODULE_AUTHOR("Roger Lucas <roger@planbit.co.uk>"); | |
938 | MODULE_DESCRIPTION("VT8231 sensors"); | |
939 | MODULE_LICENSE("GPL"); | |
940 | ||
941 | module_init(sm_vt8231_init); | |
942 | module_exit(sm_vt8231_exit); |