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1 | /* |
2 | * abituguru.c Copyright (c) 2005-2006 Hans de Goede <hdegoede@redhat.com> |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by |
6 | * the Free Software Foundation; either version 2 of the License, or |
7 | * (at your option) any later version. |
8 | * |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | * GNU General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software |
16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
17 | */ |
18 | /* |
19 | * This driver supports the sensor part of the first and second revision of |
20 | * the custom Abit uGuru chip found on Abit uGuru motherboards. Note: because |
21 | * of lack of specs the CPU/RAM voltage & frequency control is not supported! |
22 | */ |
23 | |
24 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
25 | |
26 | #include <linux/module.h> |
27 | #include <linux/sched.h> |
28 | #include <linux/init.h> |
29 | #include <linux/slab.h> |
30 | #include <linux/jiffies.h> |
31 | #include <linux/mutex.h> |
32 | #include <linux/err.h> |
33 | #include <linux/delay.h> |
34 | #include <linux/platform_device.h> |
35 | #include <linux/hwmon.h> |
36 | #include <linux/hwmon-sysfs.h> |
37 | #include <linux/dmi.h> |
38 | #include <linux/io.h> |
39 | |
40 | /* Banks */ |
41 | #define ABIT_UGURU_ALARM_BANK 0x20 /* 1x 3 bytes */ |
42 | #define ABIT_UGURU_SENSOR_BANK1 0x21 /* 16x volt and temp */ |
43 | #define ABIT_UGURU_FAN_PWM 0x24 /* 3x 5 bytes */ |
44 | #define ABIT_UGURU_SENSOR_BANK2 0x26 /* fans */ |
45 | /* max nr of sensors in bank1, a bank1 sensor can be in, temp or nc */ |
46 | #define ABIT_UGURU_MAX_BANK1_SENSORS 16 |
47 | /* |
48 | * Warning if you increase one of the 2 MAX defines below to 10 or higher you |
49 | * should adjust the belonging _NAMES_LENGTH macro for the 2 digit number! |
50 | */ |
51 | /* max nr of sensors in bank2, currently mb's with max 6 fans are known */ |
52 | #define ABIT_UGURU_MAX_BANK2_SENSORS 6 |
53 | /* max nr of pwm outputs, currently mb's with max 5 pwm outputs are known */ |
54 | #define ABIT_UGURU_MAX_PWMS 5 |
55 | /* uGuru sensor bank 1 flags */ /* Alarm if: */ |
56 | #define ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE 0x01 /* temp over warn */ |
57 | #define ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE 0x02 /* volt over max */ |
58 | #define ABIT_UGURU_VOLT_LOW_ALARM_ENABLE 0x04 /* volt under min */ |
59 | #define ABIT_UGURU_TEMP_HIGH_ALARM_FLAG 0x10 /* temp is over warn */ |
60 | #define ABIT_UGURU_VOLT_HIGH_ALARM_FLAG 0x20 /* volt is over max */ |
61 | #define ABIT_UGURU_VOLT_LOW_ALARM_FLAG 0x40 /* volt is under min */ |
62 | /* uGuru sensor bank 2 flags */ /* Alarm if: */ |
63 | #define ABIT_UGURU_FAN_LOW_ALARM_ENABLE 0x01 /* fan under min */ |
64 | /* uGuru sensor bank common flags */ |
65 | #define ABIT_UGURU_BEEP_ENABLE 0x08 /* beep if alarm */ |
66 | #define ABIT_UGURU_SHUTDOWN_ENABLE 0x80 /* shutdown if alarm */ |
67 | /* uGuru fan PWM (speed control) flags */ |
68 | #define ABIT_UGURU_FAN_PWM_ENABLE 0x80 /* enable speed control */ |
69 | /* Values used for conversion */ |
70 | #define ABIT_UGURU_FAN_MAX 15300 /* RPM */ |
71 | /* Bank1 sensor types */ |
72 | #define ABIT_UGURU_IN_SENSOR 0 |
73 | #define ABIT_UGURU_TEMP_SENSOR 1 |
74 | #define ABIT_UGURU_NC 2 |
75 | /* |
76 | * In many cases we need to wait for the uGuru to reach a certain status, most |
77 | * of the time it will reach this status within 30 - 90 ISA reads, and thus we |
78 | * can best busy wait. This define gives the total amount of reads to try. |
79 | */ |
80 | #define ABIT_UGURU_WAIT_TIMEOUT 125 |
81 | /* |
82 | * However sometimes older versions of the uGuru seem to be distracted and they |
83 | * do not respond for a long time. To handle this we sleep before each of the |
84 | * last ABIT_UGURU_WAIT_TIMEOUT_SLEEP tries. |
85 | */ |
86 | #define ABIT_UGURU_WAIT_TIMEOUT_SLEEP 5 |
87 | /* |
88 | * Normally all expected status in abituguru_ready, are reported after the |
89 | * first read, but sometimes not and we need to poll. |
90 | */ |
91 | #define ABIT_UGURU_READY_TIMEOUT 5 |
92 | /* Maximum 3 retries on timedout reads/writes, delay 200 ms before retrying */ |
93 | #define ABIT_UGURU_MAX_RETRIES 3 |
94 | #define ABIT_UGURU_RETRY_DELAY (HZ/5) |
95 | /* Maximum 2 timeouts in abituguru_update_device, iow 3 in a row is an error */ |
96 | #define ABIT_UGURU_MAX_TIMEOUTS 2 |
97 | /* utility macros */ |
98 | #define ABIT_UGURU_NAME "abituguru" |
99 | #define ABIT_UGURU_DEBUG(level, format, arg...) \ |
100 | if (level <= verbose) \ |
101 | printk(KERN_DEBUG ABIT_UGURU_NAME ": " format , ## arg) |
102 | /* Macros to help calculate the sysfs_names array length */ |
103 | /* |
104 | * sum of strlen of: in??_input\0, in??_{min,max}\0, in??_{min,max}_alarm\0, |
105 | * in??_{min,max}_alarm_enable\0, in??_beep\0, in??_shutdown\0 |
106 | */ |
107 | #define ABITUGURU_IN_NAMES_LENGTH (11 + 2 * 9 + 2 * 15 + 2 * 22 + 10 + 14) |
108 | /* |
109 | * sum of strlen of: temp??_input\0, temp??_max\0, temp??_crit\0, |
110 | * temp??_alarm\0, temp??_alarm_enable\0, temp??_beep\0, temp??_shutdown\0 |
111 | */ |
112 | #define ABITUGURU_TEMP_NAMES_LENGTH (13 + 11 + 12 + 13 + 20 + 12 + 16) |
113 | /* |
114 | * sum of strlen of: fan?_input\0, fan?_min\0, fan?_alarm\0, |
115 | * fan?_alarm_enable\0, fan?_beep\0, fan?_shutdown\0 |
116 | */ |
117 | #define ABITUGURU_FAN_NAMES_LENGTH (11 + 9 + 11 + 18 + 10 + 14) |
118 | /* |
119 | * sum of strlen of: pwm?_enable\0, pwm?_auto_channels_temp\0, |
120 | * pwm?_auto_point{1,2}_pwm\0, pwm?_auto_point{1,2}_temp\0 |
121 | */ |
122 | #define ABITUGURU_PWM_NAMES_LENGTH (12 + 24 + 2 * 21 + 2 * 22) |
123 | /* IN_NAMES_LENGTH > TEMP_NAMES_LENGTH so assume all bank1 sensors are in */ |
124 | #define ABITUGURU_SYSFS_NAMES_LENGTH ( \ |
125 | ABIT_UGURU_MAX_BANK1_SENSORS * ABITUGURU_IN_NAMES_LENGTH + \ |
126 | ABIT_UGURU_MAX_BANK2_SENSORS * ABITUGURU_FAN_NAMES_LENGTH + \ |
127 | ABIT_UGURU_MAX_PWMS * ABITUGURU_PWM_NAMES_LENGTH) |
128 | |
129 | /* |
130 | * All the macros below are named identical to the oguru and oguru2 programs |
131 | * reverse engineered by Olle Sandberg, hence the names might not be 100% |
132 | * logical. I could come up with better names, but I prefer keeping the names |
133 | * identical so that this driver can be compared with his work more easily. |
134 | */ |
135 | /* Two i/o-ports are used by uGuru */ |
136 | #define ABIT_UGURU_BASE 0x00E0 |
137 | /* Used to tell uGuru what to read and to read the actual data */ |
138 | #define ABIT_UGURU_CMD 0x00 |
139 | /* Mostly used to check if uGuru is busy */ |
140 | #define ABIT_UGURU_DATA 0x04 |
141 | #define ABIT_UGURU_REGION_LENGTH 5 |
142 | /* uGuru status' */ |
143 | #define ABIT_UGURU_STATUS_WRITE 0x00 /* Ready to be written */ |
144 | #define ABIT_UGURU_STATUS_READ 0x01 /* Ready to be read */ |
145 | #define ABIT_UGURU_STATUS_INPUT 0x08 /* More input */ |
146 | #define ABIT_UGURU_STATUS_READY 0x09 /* Ready to be written */ |
147 | |
148 | /* Constants */ |
149 | /* in (Volt) sensors go up to 3494 mV, temp to 255000 millidegrees Celsius */ |
150 | static const int abituguru_bank1_max_value[2] = { 3494, 255000 }; |
151 | /* |
152 | * Min / Max allowed values for sensor2 (fan) alarm threshold, these values |
153 | * correspond to 300-3000 RPM |
154 | */ |
155 | static const u8 abituguru_bank2_min_threshold = 5; |
156 | static const u8 abituguru_bank2_max_threshold = 50; |
157 | /* |
158 | * Register 0 is a bitfield, 1 and 2 are pwm settings (255 = 100%), 3 and 4 |
159 | * are temperature trip points. |
160 | */ |
161 | static const int abituguru_pwm_settings_multiplier[5] = { 0, 1, 1, 1000, 1000 }; |
162 | /* |
163 | * Min / Max allowed values for pwm_settings. Note: pwm1 (CPU fan) is a |
164 | * special case the minium allowed pwm% setting for this is 30% (77) on |
165 | * some MB's this special case is handled in the code! |
166 | */ |
167 | static const u8 abituguru_pwm_min[5] = { 0, 170, 170, 25, 25 }; |
168 | static const u8 abituguru_pwm_max[5] = { 0, 255, 255, 75, 75 }; |
169 | |
170 | |
171 | /* Insmod parameters */ |
172 | static bool force; |
173 | module_param(force, bool, 0); |
174 | MODULE_PARM_DESC(force, "Set to one to force detection."); |
175 | static int bank1_types[ABIT_UGURU_MAX_BANK1_SENSORS] = { -1, -1, -1, -1, -1, |
176 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }; |
177 | module_param_array(bank1_types, int, NULL, 0); |
178 | MODULE_PARM_DESC(bank1_types, "Bank1 sensortype autodetection override:\n" |
179 | " -1 autodetect\n" |
180 | " 0 volt sensor\n" |
181 | " 1 temp sensor\n" |
182 | " 2 not connected"); |
183 | static int fan_sensors; |
184 | module_param(fan_sensors, int, 0); |
185 | MODULE_PARM_DESC(fan_sensors, "Number of fan sensors on the uGuru " |
186 | "(0 = autodetect)"); |
187 | static int pwms; |
188 | module_param(pwms, int, 0); |
189 | MODULE_PARM_DESC(pwms, "Number of PWMs on the uGuru " |
190 | "(0 = autodetect)"); |
191 | |
192 | /* Default verbose is 2, since this driver is still in the testing phase */ |
193 | static int verbose = 2; |
194 | module_param(verbose, int, 0644); |
195 | MODULE_PARM_DESC(verbose, "How verbose should the driver be? (0-3):\n" |
196 | " 0 normal output\n" |
197 | " 1 + verbose error reporting\n" |
198 | " 2 + sensors type probing info\n" |
199 | " 3 + retryable error reporting"); |
200 | |
201 | |
202 | /* |
203 | * For the Abit uGuru, we need to keep some data in memory. |
204 | * The structure is dynamically allocated, at the same time when a new |
205 | * abituguru device is allocated. |
206 | */ |
207 | struct abituguru_data { |
208 | struct device *hwmon_dev; /* hwmon registered device */ |
209 | struct mutex update_lock; /* protect access to data and uGuru */ |
210 | unsigned long last_updated; /* In jiffies */ |
211 | unsigned short addr; /* uguru base address */ |
212 | char uguru_ready; /* is the uguru in ready state? */ |
213 | unsigned char update_timeouts; /* |
214 | * number of update timeouts since last |
215 | * successful update |
216 | */ |
217 | |
218 | /* |
219 | * The sysfs attr and their names are generated automatically, for bank1 |
220 | * we cannot use a predefined array because we don't know beforehand |
221 | * of a sensor is a volt or a temp sensor, for bank2 and the pwms its |
222 | * easier todo things the same way. For in sensors we have 9 (temp 7) |
223 | * sysfs entries per sensor, for bank2 and pwms 6. |
224 | */ |
225 | struct sensor_device_attribute_2 sysfs_attr[ |
226 | ABIT_UGURU_MAX_BANK1_SENSORS * 9 + |
227 | ABIT_UGURU_MAX_BANK2_SENSORS * 6 + ABIT_UGURU_MAX_PWMS * 6]; |
228 | /* Buffer to store the dynamically generated sysfs names */ |
229 | char sysfs_names[ABITUGURU_SYSFS_NAMES_LENGTH]; |
230 | |
231 | /* Bank 1 data */ |
232 | /* number of and addresses of [0] in, [1] temp sensors */ |
233 | u8 bank1_sensors[2]; |
234 | u8 bank1_address[2][ABIT_UGURU_MAX_BANK1_SENSORS]; |
235 | u8 bank1_value[ABIT_UGURU_MAX_BANK1_SENSORS]; |
236 | /* |
237 | * This array holds 3 entries per sensor for the bank 1 sensor settings |
238 | * (flags, min, max for voltage / flags, warn, shutdown for temp). |
239 | */ |
240 | u8 bank1_settings[ABIT_UGURU_MAX_BANK1_SENSORS][3]; |
241 | /* |
242 | * Maximum value for each sensor used for scaling in mV/millidegrees |
243 | * Celsius. |
244 | */ |
245 | int bank1_max_value[ABIT_UGURU_MAX_BANK1_SENSORS]; |
246 | |
247 | /* Bank 2 data, ABIT_UGURU_MAX_BANK2_SENSORS entries for bank2 */ |
248 | u8 bank2_sensors; /* actual number of bank2 sensors found */ |
249 | u8 bank2_value[ABIT_UGURU_MAX_BANK2_SENSORS]; |
250 | u8 bank2_settings[ABIT_UGURU_MAX_BANK2_SENSORS][2]; /* flags, min */ |
251 | |
252 | /* Alarms 2 bytes for bank1, 1 byte for bank2 */ |
253 | u8 alarms[3]; |
254 | |
255 | /* Fan PWM (speed control) 5 bytes per PWM */ |
256 | u8 pwms; /* actual number of pwms found */ |
257 | u8 pwm_settings[ABIT_UGURU_MAX_PWMS][5]; |
258 | }; |
259 | |
260 | static const char *never_happen = "This should never happen."; |
261 | static const char *report_this = |
262 | "Please report this to the abituguru maintainer (see MAINTAINERS)"; |
263 | |
264 | /* wait till the uguru is in the specified state */ |
265 | static int abituguru_wait(struct abituguru_data *data, u8 state) |
266 | { |
267 | int timeout = ABIT_UGURU_WAIT_TIMEOUT; |
268 | |
269 | while (inb_p(data->addr + ABIT_UGURU_DATA) != state) { |
270 | timeout--; |
271 | if (timeout == 0) |
272 | return -EBUSY; |
273 | /* |
274 | * sleep a bit before our last few tries, see the comment on |
275 | * this where ABIT_UGURU_WAIT_TIMEOUT_SLEEP is defined. |
276 | */ |
277 | if (timeout <= ABIT_UGURU_WAIT_TIMEOUT_SLEEP) |
278 | msleep(0); |
279 | } |
280 | return 0; |
281 | } |
282 | |
283 | /* Put the uguru in ready for input state */ |
284 | static int abituguru_ready(struct abituguru_data *data) |
285 | { |
286 | int timeout = ABIT_UGURU_READY_TIMEOUT; |
287 | |
288 | if (data->uguru_ready) |
289 | return 0; |
290 | |
291 | /* Reset? / Prepare for next read/write cycle */ |
292 | outb(0x00, data->addr + ABIT_UGURU_DATA); |
293 | |
294 | /* Wait till the uguru is ready */ |
295 | if (abituguru_wait(data, ABIT_UGURU_STATUS_READY)) { |
296 | ABIT_UGURU_DEBUG(1, |
297 | "timeout exceeded waiting for ready state\n"); |
298 | return -EIO; |
299 | } |
300 | |
301 | /* Cmd port MUST be read now and should contain 0xAC */ |
302 | while (inb_p(data->addr + ABIT_UGURU_CMD) != 0xAC) { |
303 | timeout--; |
304 | if (timeout == 0) { |
305 | ABIT_UGURU_DEBUG(1, |
306 | "CMD reg does not hold 0xAC after ready command\n"); |
307 | return -EIO; |
308 | } |
309 | msleep(0); |
310 | } |
311 | |
312 | /* |
313 | * After this the ABIT_UGURU_DATA port should contain |
314 | * ABIT_UGURU_STATUS_INPUT |
315 | */ |
316 | timeout = ABIT_UGURU_READY_TIMEOUT; |
317 | while (inb_p(data->addr + ABIT_UGURU_DATA) != ABIT_UGURU_STATUS_INPUT) { |
318 | timeout--; |
319 | if (timeout == 0) { |
320 | ABIT_UGURU_DEBUG(1, |
321 | "state != more input after ready command\n"); |
322 | return -EIO; |
323 | } |
324 | msleep(0); |
325 | } |
326 | |
327 | data->uguru_ready = 1; |
328 | return 0; |
329 | } |
330 | |
331 | /* |
332 | * Send the bank and then sensor address to the uGuru for the next read/write |
333 | * cycle. This function gets called as the first part of a read/write by |
334 | * abituguru_read and abituguru_write. This function should never be |
335 | * called by any other function. |
336 | */ |
337 | static int abituguru_send_address(struct abituguru_data *data, |
338 | u8 bank_addr, u8 sensor_addr, int retries) |
339 | { |
340 | /* |
341 | * assume the caller does error handling itself if it has not requested |
342 | * any retries, and thus be quiet. |
343 | */ |
344 | int report_errors = retries; |
345 | |
346 | for (;;) { |
347 | /* |
348 | * Make sure the uguru is ready and then send the bank address, |
349 | * after this the uguru is no longer "ready". |
350 | */ |
351 | if (abituguru_ready(data) != 0) |
352 | return -EIO; |
353 | outb(bank_addr, data->addr + ABIT_UGURU_DATA); |
354 | data->uguru_ready = 0; |
355 | |
356 | /* |
357 | * Wait till the uguru is ABIT_UGURU_STATUS_INPUT state again |
358 | * and send the sensor addr |
359 | */ |
360 | if (abituguru_wait(data, ABIT_UGURU_STATUS_INPUT)) { |
361 | if (retries) { |
362 | ABIT_UGURU_DEBUG(3, "timeout exceeded " |
363 | "waiting for more input state, %d " |
364 | "tries remaining\n", retries); |
365 | set_current_state(TASK_UNINTERRUPTIBLE); |
366 | schedule_timeout(ABIT_UGURU_RETRY_DELAY); |
367 | retries--; |
368 | continue; |
369 | } |
370 | if (report_errors) |
371 | ABIT_UGURU_DEBUG(1, "timeout exceeded " |
372 | "waiting for more input state " |
373 | "(bank: %d)\n", (int)bank_addr); |
374 | return -EBUSY; |
375 | } |
376 | outb(sensor_addr, data->addr + ABIT_UGURU_CMD); |
377 | return 0; |
378 | } |
379 | } |
380 | |
381 | /* |
382 | * Read count bytes from sensor sensor_addr in bank bank_addr and store the |
383 | * result in buf, retry the send address part of the read retries times. |
384 | */ |
385 | static int abituguru_read(struct abituguru_data *data, |
386 | u8 bank_addr, u8 sensor_addr, u8 *buf, int count, int retries) |
387 | { |
388 | int i; |
389 | |
390 | /* Send the address */ |
391 | i = abituguru_send_address(data, bank_addr, sensor_addr, retries); |
392 | if (i) |
393 | return i; |
394 | |
395 | /* And read the data */ |
396 | for (i = 0; i < count; i++) { |
397 | if (abituguru_wait(data, ABIT_UGURU_STATUS_READ)) { |
398 | ABIT_UGURU_DEBUG(retries ? 1 : 3, |
399 | "timeout exceeded waiting for " |
400 | "read state (bank: %d, sensor: %d)\n", |
401 | (int)bank_addr, (int)sensor_addr); |
402 | break; |
403 | } |
404 | buf[i] = inb(data->addr + ABIT_UGURU_CMD); |
405 | } |
406 | |
407 | /* Last put the chip back in ready state */ |
408 | abituguru_ready(data); |
409 | |
410 | return i; |
411 | } |
412 | |
413 | /* |
414 | * Write count bytes from buf to sensor sensor_addr in bank bank_addr, the send |
415 | * address part of the write is always retried ABIT_UGURU_MAX_RETRIES times. |
416 | */ |
417 | static int abituguru_write(struct abituguru_data *data, |
418 | u8 bank_addr, u8 sensor_addr, u8 *buf, int count) |
419 | { |
420 | /* |
421 | * We use the ready timeout as we have to wait for 0xAC just like the |
422 | * ready function |
423 | */ |
424 | int i, timeout = ABIT_UGURU_READY_TIMEOUT; |
425 | |
426 | /* Send the address */ |
427 | i = abituguru_send_address(data, bank_addr, sensor_addr, |
428 | ABIT_UGURU_MAX_RETRIES); |
429 | if (i) |
430 | return i; |
431 | |
432 | /* And write the data */ |
433 | for (i = 0; i < count; i++) { |
434 | if (abituguru_wait(data, ABIT_UGURU_STATUS_WRITE)) { |
435 | ABIT_UGURU_DEBUG(1, "timeout exceeded waiting for " |
436 | "write state (bank: %d, sensor: %d)\n", |
437 | (int)bank_addr, (int)sensor_addr); |
438 | break; |
439 | } |
440 | outb(buf[i], data->addr + ABIT_UGURU_CMD); |
441 | } |
442 | |
443 | /* |
444 | * Now we need to wait till the chip is ready to be read again, |
445 | * so that we can read 0xAC as confirmation that our write has |
446 | * succeeded. |
447 | */ |
448 | if (abituguru_wait(data, ABIT_UGURU_STATUS_READ)) { |
449 | ABIT_UGURU_DEBUG(1, "timeout exceeded waiting for read state " |
450 | "after write (bank: %d, sensor: %d)\n", (int)bank_addr, |
451 | (int)sensor_addr); |
452 | return -EIO; |
453 | } |
454 | |
455 | /* Cmd port MUST be read now and should contain 0xAC */ |
456 | while (inb_p(data->addr + ABIT_UGURU_CMD) != 0xAC) { |
457 | timeout--; |
458 | if (timeout == 0) { |
459 | ABIT_UGURU_DEBUG(1, "CMD reg does not hold 0xAC after " |
460 | "write (bank: %d, sensor: %d)\n", |
461 | (int)bank_addr, (int)sensor_addr); |
462 | return -EIO; |
463 | } |
464 | msleep(0); |
465 | } |
466 | |
467 | /* Last put the chip back in ready state */ |
468 | abituguru_ready(data); |
469 | |
470 | return i; |
471 | } |
472 | |
473 | /* |
474 | * Detect sensor type. Temp and Volt sensors are enabled with |
475 | * different masks and will ignore enable masks not meant for them. |
476 | * This enables us to test what kind of sensor we're dealing with. |
477 | * By setting the alarm thresholds so that we will always get an |
478 | * alarm for sensor type X and then enabling the sensor as sensor type |
479 | * X, if we then get an alarm it is a sensor of type X. |
480 | */ |
481 | static int |
482 | abituguru_detect_bank1_sensor_type(struct abituguru_data *data, |
483 | u8 sensor_addr) |
484 | { |
485 | u8 val, test_flag, buf[3]; |
486 | int i, ret = -ENODEV; /* error is the most common used retval :| */ |
487 | |
488 | /* If overriden by the user return the user selected type */ |
489 | if (bank1_types[sensor_addr] >= ABIT_UGURU_IN_SENSOR && |
490 | bank1_types[sensor_addr] <= ABIT_UGURU_NC) { |
491 | ABIT_UGURU_DEBUG(2, "assuming sensor type %d for bank1 sensor " |
492 | "%d because of \"bank1_types\" module param\n", |
493 | bank1_types[sensor_addr], (int)sensor_addr); |
494 | return bank1_types[sensor_addr]; |
495 | } |
496 | |
497 | /* First read the sensor and the current settings */ |
498 | if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1, sensor_addr, &val, |
499 | 1, ABIT_UGURU_MAX_RETRIES) != 1) |
500 | return -ENODEV; |
501 | |
502 | /* Test val is sane / usable for sensor type detection. */ |
503 | if ((val < 10u) || (val > 250u)) { |
504 | pr_warn("bank1-sensor: %d reading (%d) too close to limits, " |
505 | "unable to determine sensor type, skipping sensor\n", |
506 | (int)sensor_addr, (int)val); |
507 | /* |
508 | * assume no sensor is there for sensors for which we can't |
509 | * determine the sensor type because their reading is too close |
510 | * to their limits, this usually means no sensor is there. |
511 | */ |
512 | return ABIT_UGURU_NC; |
513 | } |
514 | |
515 | ABIT_UGURU_DEBUG(2, "testing bank1 sensor %d\n", (int)sensor_addr); |
516 | /* |
517 | * Volt sensor test, enable volt low alarm, set min value ridicously |
518 | * high, or vica versa if the reading is very high. If its a volt |
519 | * sensor this should always give us an alarm. |
520 | */ |
521 | if (val <= 240u) { |
522 | buf[0] = ABIT_UGURU_VOLT_LOW_ALARM_ENABLE; |
523 | buf[1] = 245; |
524 | buf[2] = 250; |
525 | test_flag = ABIT_UGURU_VOLT_LOW_ALARM_FLAG; |
526 | } else { |
527 | buf[0] = ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE; |
528 | buf[1] = 5; |
529 | buf[2] = 10; |
530 | test_flag = ABIT_UGURU_VOLT_HIGH_ALARM_FLAG; |
531 | } |
532 | |
533 | if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, sensor_addr, |
534 | buf, 3) != 3) |
535 | goto abituguru_detect_bank1_sensor_type_exit; |
536 | /* |
537 | * Now we need 20 ms to give the uguru time to read the sensors |
538 | * and raise a voltage alarm |
539 | */ |
540 | set_current_state(TASK_UNINTERRUPTIBLE); |
541 | schedule_timeout(HZ/50); |
542 | /* Check for alarm and check the alarm is a volt low alarm. */ |
543 | if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, buf, 3, |
544 | ABIT_UGURU_MAX_RETRIES) != 3) |
545 | goto abituguru_detect_bank1_sensor_type_exit; |
546 | if (buf[sensor_addr/8] & (0x01 << (sensor_addr % 8))) { |
547 | if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1, |
548 | sensor_addr, buf, 3, |
549 | ABIT_UGURU_MAX_RETRIES) != 3) |
550 | goto abituguru_detect_bank1_sensor_type_exit; |
551 | if (buf[0] & test_flag) { |
552 | ABIT_UGURU_DEBUG(2, " found volt sensor\n"); |
553 | ret = ABIT_UGURU_IN_SENSOR; |
554 | goto abituguru_detect_bank1_sensor_type_exit; |
555 | } else |
556 | ABIT_UGURU_DEBUG(2, " alarm raised during volt " |
557 | "sensor test, but volt range flag not set\n"); |
558 | } else |
559 | ABIT_UGURU_DEBUG(2, " alarm not raised during volt sensor " |
560 | "test\n"); |
561 | |
562 | /* |
563 | * Temp sensor test, enable sensor as a temp sensor, set beep value |
564 | * ridicously low (but not too low, otherwise uguru ignores it). |
565 | * If its a temp sensor this should always give us an alarm. |
566 | */ |
567 | buf[0] = ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE; |
568 | buf[1] = 5; |
569 | buf[2] = 10; |
570 | if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, sensor_addr, |
571 | buf, 3) != 3) |
572 | goto abituguru_detect_bank1_sensor_type_exit; |
573 | /* |
574 | * Now we need 50 ms to give the uguru time to read the sensors |
575 | * and raise a temp alarm |
576 | */ |
577 | set_current_state(TASK_UNINTERRUPTIBLE); |
578 | schedule_timeout(HZ/20); |
579 | /* Check for alarm and check the alarm is a temp high alarm. */ |
580 | if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, buf, 3, |
581 | ABIT_UGURU_MAX_RETRIES) != 3) |
582 | goto abituguru_detect_bank1_sensor_type_exit; |
583 | if (buf[sensor_addr/8] & (0x01 << (sensor_addr % 8))) { |
584 | if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1, |
585 | sensor_addr, buf, 3, |
586 | ABIT_UGURU_MAX_RETRIES) != 3) |
587 | goto abituguru_detect_bank1_sensor_type_exit; |
588 | if (buf[0] & ABIT_UGURU_TEMP_HIGH_ALARM_FLAG) { |
589 | ABIT_UGURU_DEBUG(2, " found temp sensor\n"); |
590 | ret = ABIT_UGURU_TEMP_SENSOR; |
591 | goto abituguru_detect_bank1_sensor_type_exit; |
592 | } else |
593 | ABIT_UGURU_DEBUG(2, " alarm raised during temp " |
594 | "sensor test, but temp high flag not set\n"); |
595 | } else |
596 | ABIT_UGURU_DEBUG(2, " alarm not raised during temp sensor " |
597 | "test\n"); |
598 | |
599 | ret = ABIT_UGURU_NC; |
600 | abituguru_detect_bank1_sensor_type_exit: |
601 | /* |
602 | * Restore original settings, failing here is really BAD, it has been |
603 | * reported that some BIOS-es hang when entering the uGuru menu with |
604 | * invalid settings present in the uGuru, so we try this 3 times. |
605 | */ |
606 | for (i = 0; i < 3; i++) |
607 | if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, |
608 | sensor_addr, data->bank1_settings[sensor_addr], |
609 | 3) == 3) |
610 | break; |
611 | if (i == 3) { |
612 | pr_err("Fatal error could not restore original settings. %s %s\n", |
613 | never_happen, report_this); |
614 | return -ENODEV; |
615 | } |
616 | return ret; |
617 | } |
618 | |
619 | /* |
620 | * These functions try to find out how many sensors there are in bank2 and how |
621 | * many pwms there are. The purpose of this is to make sure that we don't give |
622 | * the user the possibility to change settings for non-existent sensors / pwm. |
623 | * The uGuru will happily read / write whatever memory happens to be after the |
624 | * memory storing the PWM settings when reading/writing to a PWM which is not |
625 | * there. Notice even if we detect a PWM which doesn't exist we normally won't |
626 | * write to it, unless the user tries to change the settings. |
627 | * |
628 | * Although the uGuru allows reading (settings) from non existing bank2 |
629 | * sensors, my version of the uGuru does seem to stop writing to them, the |
630 | * write function above aborts in this case with: |
631 | * "CMD reg does not hold 0xAC after write" |
632 | * |
633 | * Notice these 2 tests are non destructive iow read-only tests, otherwise |
634 | * they would defeat their purpose. Although for the bank2_sensors detection a |
635 | * read/write test would be feasible because of the reaction above, I've |
636 | * however opted to stay on the safe side. |
637 | */ |
638 | static void |
639 | abituguru_detect_no_bank2_sensors(struct abituguru_data *data) |
640 | { |
641 | int i; |
642 | |
643 | if (fan_sensors > 0 && fan_sensors <= ABIT_UGURU_MAX_BANK2_SENSORS) { |
644 | data->bank2_sensors = fan_sensors; |
645 | ABIT_UGURU_DEBUG(2, "assuming %d fan sensors because of " |
646 | "\"fan_sensors\" module param\n", |
647 | (int)data->bank2_sensors); |
648 | return; |
649 | } |
650 | |
651 | ABIT_UGURU_DEBUG(2, "detecting number of fan sensors\n"); |
652 | for (i = 0; i < ABIT_UGURU_MAX_BANK2_SENSORS; i++) { |
653 | /* |
654 | * 0x89 are the known used bits: |
655 | * -0x80 enable shutdown |
656 | * -0x08 enable beep |
657 | * -0x01 enable alarm |
658 | * All other bits should be 0, but on some motherboards |
659 | * 0x40 (bit 6) is also high for some of the fans?? |
660 | */ |
661 | if (data->bank2_settings[i][0] & ~0xC9) { |
662 | ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem " |
663 | "to be a fan sensor: settings[0] = %02X\n", |
664 | i, (unsigned int)data->bank2_settings[i][0]); |
665 | break; |
666 | } |
667 | |
668 | /* check if the threshold is within the allowed range */ |
669 | if (data->bank2_settings[i][1] < |
670 | abituguru_bank2_min_threshold) { |
671 | ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem " |
672 | "to be a fan sensor: the threshold (%d) is " |
673 | "below the minimum (%d)\n", i, |
674 | (int)data->bank2_settings[i][1], |
675 | (int)abituguru_bank2_min_threshold); |
676 | break; |
677 | } |
678 | if (data->bank2_settings[i][1] > |
679 | abituguru_bank2_max_threshold) { |
680 | ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem " |
681 | "to be a fan sensor: the threshold (%d) is " |
682 | "above the maximum (%d)\n", i, |
683 | (int)data->bank2_settings[i][1], |
684 | (int)abituguru_bank2_max_threshold); |
685 | break; |
686 | } |
687 | } |
688 | |
689 | data->bank2_sensors = i; |
690 | ABIT_UGURU_DEBUG(2, " found: %d fan sensors\n", |
691 | (int)data->bank2_sensors); |
692 | } |
693 | |
694 | static void |
695 | abituguru_detect_no_pwms(struct abituguru_data *data) |
696 | { |
697 | int i, j; |
698 | |
699 | if (pwms > 0 && pwms <= ABIT_UGURU_MAX_PWMS) { |
700 | data->pwms = pwms; |
701 | ABIT_UGURU_DEBUG(2, "assuming %d PWM outputs because of " |
702 | "\"pwms\" module param\n", (int)data->pwms); |
703 | return; |
704 | } |
705 | |
706 | ABIT_UGURU_DEBUG(2, "detecting number of PWM outputs\n"); |
707 | for (i = 0; i < ABIT_UGURU_MAX_PWMS; i++) { |
708 | /* |
709 | * 0x80 is the enable bit and the low |
710 | * nibble is which temp sensor to use, |
711 | * the other bits should be 0 |
712 | */ |
713 | if (data->pwm_settings[i][0] & ~0x8F) { |
714 | ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem " |
715 | "to be a pwm channel: settings[0] = %02X\n", |
716 | i, (unsigned int)data->pwm_settings[i][0]); |
717 | break; |
718 | } |
719 | |
720 | /* |
721 | * the low nibble must correspond to one of the temp sensors |
722 | * we've found |
723 | */ |
724 | for (j = 0; j < data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]; |
725 | j++) { |
726 | if (data->bank1_address[ABIT_UGURU_TEMP_SENSOR][j] == |
727 | (data->pwm_settings[i][0] & 0x0F)) |
728 | break; |
729 | } |
730 | if (j == data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]) { |
731 | ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem " |
732 | "to be a pwm channel: %d is not a valid temp " |
733 | "sensor address\n", i, |
734 | data->pwm_settings[i][0] & 0x0F); |
735 | break; |
736 | } |
737 | |
738 | /* check if all other settings are within the allowed range */ |
739 | for (j = 1; j < 5; j++) { |
740 | u8 min; |
741 | /* special case pwm1 min pwm% */ |
742 | if ((i == 0) && ((j == 1) || (j == 2))) |
743 | min = 77; |
744 | else |
745 | min = abituguru_pwm_min[j]; |
746 | if (data->pwm_settings[i][j] < min) { |
747 | ABIT_UGURU_DEBUG(2, " pwm channel %d does " |
748 | "not seem to be a pwm channel: " |
749 | "setting %d (%d) is below the minimum " |
750 | "value (%d)\n", i, j, |
751 | (int)data->pwm_settings[i][j], |
752 | (int)min); |
753 | goto abituguru_detect_no_pwms_exit; |
754 | } |
755 | if (data->pwm_settings[i][j] > abituguru_pwm_max[j]) { |
756 | ABIT_UGURU_DEBUG(2, " pwm channel %d does " |
757 | "not seem to be a pwm channel: " |
758 | "setting %d (%d) is above the maximum " |
759 | "value (%d)\n", i, j, |
760 | (int)data->pwm_settings[i][j], |
761 | (int)abituguru_pwm_max[j]); |
762 | goto abituguru_detect_no_pwms_exit; |
763 | } |
764 | } |
765 | |
766 | /* check that min temp < max temp and min pwm < max pwm */ |
767 | if (data->pwm_settings[i][1] >= data->pwm_settings[i][2]) { |
768 | ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem " |
769 | "to be a pwm channel: min pwm (%d) >= " |
770 | "max pwm (%d)\n", i, |
771 | (int)data->pwm_settings[i][1], |
772 | (int)data->pwm_settings[i][2]); |
773 | break; |
774 | } |
775 | if (data->pwm_settings[i][3] >= data->pwm_settings[i][4]) { |
776 | ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem " |
777 | "to be a pwm channel: min temp (%d) >= " |
778 | "max temp (%d)\n", i, |
779 | (int)data->pwm_settings[i][3], |
780 | (int)data->pwm_settings[i][4]); |
781 | break; |
782 | } |
783 | } |
784 | |
785 | abituguru_detect_no_pwms_exit: |
786 | data->pwms = i; |
787 | ABIT_UGURU_DEBUG(2, " found: %d PWM outputs\n", (int)data->pwms); |
788 | } |
789 | |
790 | /* |
791 | * Following are the sysfs callback functions. These functions expect: |
792 | * sensor_device_attribute_2->index: sensor address/offset in the bank |
793 | * sensor_device_attribute_2->nr: register offset, bitmask or NA. |
794 | */ |
795 | static struct abituguru_data *abituguru_update_device(struct device *dev); |
796 | |
797 | static ssize_t show_bank1_value(struct device *dev, |
798 | struct device_attribute *devattr, char *buf) |
799 | { |
800 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
801 | struct abituguru_data *data = abituguru_update_device(dev); |
802 | if (!data) |
803 | return -EIO; |
804 | return sprintf(buf, "%d\n", (data->bank1_value[attr->index] * |
805 | data->bank1_max_value[attr->index] + 128) / 255); |
806 | } |
807 | |
808 | static ssize_t show_bank1_setting(struct device *dev, |
809 | struct device_attribute *devattr, char *buf) |
810 | { |
811 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
812 | struct abituguru_data *data = dev_get_drvdata(dev); |
813 | return sprintf(buf, "%d\n", |
814 | (data->bank1_settings[attr->index][attr->nr] * |
815 | data->bank1_max_value[attr->index] + 128) / 255); |
816 | } |
817 | |
818 | static ssize_t show_bank2_value(struct device *dev, |
819 | struct device_attribute *devattr, char *buf) |
820 | { |
821 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
822 | struct abituguru_data *data = abituguru_update_device(dev); |
823 | if (!data) |
824 | return -EIO; |
825 | return sprintf(buf, "%d\n", (data->bank2_value[attr->index] * |
826 | ABIT_UGURU_FAN_MAX + 128) / 255); |
827 | } |
828 | |
829 | static ssize_t show_bank2_setting(struct device *dev, |
830 | struct device_attribute *devattr, char *buf) |
831 | { |
832 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
833 | struct abituguru_data *data = dev_get_drvdata(dev); |
834 | return sprintf(buf, "%d\n", |
835 | (data->bank2_settings[attr->index][attr->nr] * |
836 | ABIT_UGURU_FAN_MAX + 128) / 255); |
837 | } |
838 | |
839 | static ssize_t store_bank1_setting(struct device *dev, struct device_attribute |
840 | *devattr, const char *buf, size_t count) |
841 | { |
842 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
843 | struct abituguru_data *data = dev_get_drvdata(dev); |
844 | unsigned long val; |
845 | ssize_t ret; |
846 | |
847 | ret = kstrtoul(buf, 10, &val); |
848 | if (ret) |
849 | return ret; |
850 | |
851 | ret = count; |
852 | val = (val * 255 + data->bank1_max_value[attr->index] / 2) / |
853 | data->bank1_max_value[attr->index]; |
854 | if (val > 255) |
855 | return -EINVAL; |
856 | |
857 | mutex_lock(&data->update_lock); |
858 | if (data->bank1_settings[attr->index][attr->nr] != val) { |
859 | u8 orig_val = data->bank1_settings[attr->index][attr->nr]; |
860 | data->bank1_settings[attr->index][attr->nr] = val; |
861 | if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, |
862 | attr->index, data->bank1_settings[attr->index], |
863 | 3) <= attr->nr) { |
864 | data->bank1_settings[attr->index][attr->nr] = orig_val; |
865 | ret = -EIO; |
866 | } |
867 | } |
868 | mutex_unlock(&data->update_lock); |
869 | return ret; |
870 | } |
871 | |
872 | static ssize_t store_bank2_setting(struct device *dev, struct device_attribute |
873 | *devattr, const char *buf, size_t count) |
874 | { |
875 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
876 | struct abituguru_data *data = dev_get_drvdata(dev); |
877 | unsigned long val; |
878 | ssize_t ret; |
879 | |
880 | ret = kstrtoul(buf, 10, &val); |
881 | if (ret) |
882 | return ret; |
883 | |
884 | ret = count; |
885 | val = (val * 255 + ABIT_UGURU_FAN_MAX / 2) / ABIT_UGURU_FAN_MAX; |
886 | |
887 | /* this check can be done before taking the lock */ |
888 | if (val < abituguru_bank2_min_threshold || |
889 | val > abituguru_bank2_max_threshold) |
890 | return -EINVAL; |
891 | |
892 | mutex_lock(&data->update_lock); |
893 | if (data->bank2_settings[attr->index][attr->nr] != val) { |
894 | u8 orig_val = data->bank2_settings[attr->index][attr->nr]; |
895 | data->bank2_settings[attr->index][attr->nr] = val; |
896 | if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK2 + 2, |
897 | attr->index, data->bank2_settings[attr->index], |
898 | 2) <= attr->nr) { |
899 | data->bank2_settings[attr->index][attr->nr] = orig_val; |
900 | ret = -EIO; |
901 | } |
902 | } |
903 | mutex_unlock(&data->update_lock); |
904 | return ret; |
905 | } |
906 | |
907 | static ssize_t show_bank1_alarm(struct device *dev, |
908 | struct device_attribute *devattr, char *buf) |
909 | { |
910 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
911 | struct abituguru_data *data = abituguru_update_device(dev); |
912 | if (!data) |
913 | return -EIO; |
914 | /* |
915 | * See if the alarm bit for this sensor is set, and if the |
916 | * alarm matches the type of alarm we're looking for (for volt |
917 | * it can be either low or high). The type is stored in a few |
918 | * readonly bits in the settings part of the relevant sensor. |
919 | * The bitmask of the type is passed to us in attr->nr. |
920 | */ |
921 | if ((data->alarms[attr->index / 8] & (0x01 << (attr->index % 8))) && |
922 | (data->bank1_settings[attr->index][0] & attr->nr)) |
923 | return sprintf(buf, "1\n"); |
924 | else |
925 | return sprintf(buf, "0\n"); |
926 | } |
927 | |
928 | static ssize_t show_bank2_alarm(struct device *dev, |
929 | struct device_attribute *devattr, char *buf) |
930 | { |
931 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
932 | struct abituguru_data *data = abituguru_update_device(dev); |
933 | if (!data) |
934 | return -EIO; |
935 | if (data->alarms[2] & (0x01 << attr->index)) |
936 | return sprintf(buf, "1\n"); |
937 | else |
938 | return sprintf(buf, "0\n"); |
939 | } |
940 | |
941 | static ssize_t show_bank1_mask(struct device *dev, |
942 | struct device_attribute *devattr, char *buf) |
943 | { |
944 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
945 | struct abituguru_data *data = dev_get_drvdata(dev); |
946 | if (data->bank1_settings[attr->index][0] & attr->nr) |
947 | return sprintf(buf, "1\n"); |
948 | else |
949 | return sprintf(buf, "0\n"); |
950 | } |
951 | |
952 | static ssize_t show_bank2_mask(struct device *dev, |
953 | struct device_attribute *devattr, char *buf) |
954 | { |
955 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
956 | struct abituguru_data *data = dev_get_drvdata(dev); |
957 | if (data->bank2_settings[attr->index][0] & attr->nr) |
958 | return sprintf(buf, "1\n"); |
959 | else |
960 | return sprintf(buf, "0\n"); |
961 | } |
962 | |
963 | static ssize_t store_bank1_mask(struct device *dev, |
964 | struct device_attribute *devattr, const char *buf, size_t count) |
965 | { |
966 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
967 | struct abituguru_data *data = dev_get_drvdata(dev); |
968 | ssize_t ret; |
969 | u8 orig_val; |
970 | unsigned long mask; |
971 | |
972 | ret = kstrtoul(buf, 10, &mask); |
973 | if (ret) |
974 | return ret; |
975 | |
976 | ret = count; |
977 | mutex_lock(&data->update_lock); |
978 | orig_val = data->bank1_settings[attr->index][0]; |
979 | |
980 | if (mask) |
981 | data->bank1_settings[attr->index][0] |= attr->nr; |
982 | else |
983 | data->bank1_settings[attr->index][0] &= ~attr->nr; |
984 | |
985 | if ((data->bank1_settings[attr->index][0] != orig_val) && |
986 | (abituguru_write(data, |
987 | ABIT_UGURU_SENSOR_BANK1 + 2, attr->index, |
988 | data->bank1_settings[attr->index], 3) < 1)) { |
989 | data->bank1_settings[attr->index][0] = orig_val; |
990 | ret = -EIO; |
991 | } |
992 | mutex_unlock(&data->update_lock); |
993 | return ret; |
994 | } |
995 | |
996 | static ssize_t store_bank2_mask(struct device *dev, |
997 | struct device_attribute *devattr, const char *buf, size_t count) |
998 | { |
999 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1000 | struct abituguru_data *data = dev_get_drvdata(dev); |
1001 | ssize_t ret; |
1002 | u8 orig_val; |
1003 | unsigned long mask; |
1004 | |
1005 | ret = kstrtoul(buf, 10, &mask); |
1006 | if (ret) |
1007 | return ret; |
1008 | |
1009 | ret = count; |
1010 | mutex_lock(&data->update_lock); |
1011 | orig_val = data->bank2_settings[attr->index][0]; |
1012 | |
1013 | if (mask) |
1014 | data->bank2_settings[attr->index][0] |= attr->nr; |
1015 | else |
1016 | data->bank2_settings[attr->index][0] &= ~attr->nr; |
1017 | |
1018 | if ((data->bank2_settings[attr->index][0] != orig_val) && |
1019 | (abituguru_write(data, |
1020 | ABIT_UGURU_SENSOR_BANK2 + 2, attr->index, |
1021 | data->bank2_settings[attr->index], 2) < 1)) { |
1022 | data->bank2_settings[attr->index][0] = orig_val; |
1023 | ret = -EIO; |
1024 | } |
1025 | mutex_unlock(&data->update_lock); |
1026 | return ret; |
1027 | } |
1028 | |
1029 | /* Fan PWM (speed control) */ |
1030 | static ssize_t show_pwm_setting(struct device *dev, |
1031 | struct device_attribute *devattr, char *buf) |
1032 | { |
1033 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1034 | struct abituguru_data *data = dev_get_drvdata(dev); |
1035 | return sprintf(buf, "%d\n", data->pwm_settings[attr->index][attr->nr] * |
1036 | abituguru_pwm_settings_multiplier[attr->nr]); |
1037 | } |
1038 | |
1039 | static ssize_t store_pwm_setting(struct device *dev, struct device_attribute |
1040 | *devattr, const char *buf, size_t count) |
1041 | { |
1042 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1043 | struct abituguru_data *data = dev_get_drvdata(dev); |
1044 | u8 min; |
1045 | unsigned long val; |
1046 | ssize_t ret; |
1047 | |
1048 | ret = kstrtoul(buf, 10, &val); |
1049 | if (ret) |
1050 | return ret; |
1051 | |
1052 | ret = count; |
1053 | val = (val + abituguru_pwm_settings_multiplier[attr->nr] / 2) / |
1054 | abituguru_pwm_settings_multiplier[attr->nr]; |
1055 | |
1056 | /* special case pwm1 min pwm% */ |
1057 | if ((attr->index == 0) && ((attr->nr == 1) || (attr->nr == 2))) |
1058 | min = 77; |
1059 | else |
1060 | min = abituguru_pwm_min[attr->nr]; |
1061 | |
1062 | /* this check can be done before taking the lock */ |
1063 | if (val < min || val > abituguru_pwm_max[attr->nr]) |
1064 | return -EINVAL; |
1065 | |
1066 | mutex_lock(&data->update_lock); |
1067 | /* this check needs to be done after taking the lock */ |
1068 | if ((attr->nr & 1) && |
1069 | (val >= data->pwm_settings[attr->index][attr->nr + 1])) |
1070 | ret = -EINVAL; |
1071 | else if (!(attr->nr & 1) && |
1072 | (val <= data->pwm_settings[attr->index][attr->nr - 1])) |
1073 | ret = -EINVAL; |
1074 | else if (data->pwm_settings[attr->index][attr->nr] != val) { |
1075 | u8 orig_val = data->pwm_settings[attr->index][attr->nr]; |
1076 | data->pwm_settings[attr->index][attr->nr] = val; |
1077 | if (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1, |
1078 | attr->index, data->pwm_settings[attr->index], |
1079 | 5) <= attr->nr) { |
1080 | data->pwm_settings[attr->index][attr->nr] = |
1081 | orig_val; |
1082 | ret = -EIO; |
1083 | } |
1084 | } |
1085 | mutex_unlock(&data->update_lock); |
1086 | return ret; |
1087 | } |
1088 | |
1089 | static ssize_t show_pwm_sensor(struct device *dev, |
1090 | struct device_attribute *devattr, char *buf) |
1091 | { |
1092 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1093 | struct abituguru_data *data = dev_get_drvdata(dev); |
1094 | int i; |
1095 | /* |
1096 | * We need to walk to the temp sensor addresses to find what |
1097 | * the userspace id of the configured temp sensor is. |
1098 | */ |
1099 | for (i = 0; i < data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]; i++) |
1100 | if (data->bank1_address[ABIT_UGURU_TEMP_SENSOR][i] == |
1101 | (data->pwm_settings[attr->index][0] & 0x0F)) |
1102 | return sprintf(buf, "%d\n", i+1); |
1103 | |
1104 | return -ENXIO; |
1105 | } |
1106 | |
1107 | static ssize_t store_pwm_sensor(struct device *dev, struct device_attribute |
1108 | *devattr, const char *buf, size_t count) |
1109 | { |
1110 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1111 | struct abituguru_data *data = dev_get_drvdata(dev); |
1112 | ssize_t ret; |
1113 | unsigned long val; |
1114 | u8 orig_val; |
1115 | u8 address; |
1116 | |
1117 | ret = kstrtoul(buf, 10, &val); |
1118 | if (ret) |
1119 | return ret; |
1120 | |
1121 | if (val == 0 || val > data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]) |
1122 | return -EINVAL; |
1123 | |
1124 | val -= 1; |
1125 | ret = count; |
1126 | mutex_lock(&data->update_lock); |
1127 | orig_val = data->pwm_settings[attr->index][0]; |
1128 | address = data->bank1_address[ABIT_UGURU_TEMP_SENSOR][val]; |
1129 | data->pwm_settings[attr->index][0] &= 0xF0; |
1130 | data->pwm_settings[attr->index][0] |= address; |
1131 | if (data->pwm_settings[attr->index][0] != orig_val) { |
1132 | if (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1, attr->index, |
1133 | data->pwm_settings[attr->index], 5) < 1) { |
1134 | data->pwm_settings[attr->index][0] = orig_val; |
1135 | ret = -EIO; |
1136 | } |
1137 | } |
1138 | mutex_unlock(&data->update_lock); |
1139 | return ret; |
1140 | } |
1141 | |
1142 | static ssize_t show_pwm_enable(struct device *dev, |
1143 | struct device_attribute *devattr, char *buf) |
1144 | { |
1145 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1146 | struct abituguru_data *data = dev_get_drvdata(dev); |
1147 | int res = 0; |
1148 | if (data->pwm_settings[attr->index][0] & ABIT_UGURU_FAN_PWM_ENABLE) |
1149 | res = 2; |
1150 | return sprintf(buf, "%d\n", res); |
1151 | } |
1152 | |
1153 | static ssize_t store_pwm_enable(struct device *dev, struct device_attribute |
1154 | *devattr, const char *buf, size_t count) |
1155 | { |
1156 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
1157 | struct abituguru_data *data = dev_get_drvdata(dev); |
1158 | u8 orig_val; |
1159 | ssize_t ret; |
1160 | unsigned long user_val; |
1161 | |
1162 | ret = kstrtoul(buf, 10, &user_val); |
1163 | if (ret) |
1164 | return ret; |
1165 | |
1166 | ret = count; |
1167 | mutex_lock(&data->update_lock); |
1168 | orig_val = data->pwm_settings[attr->index][0]; |
1169 | switch (user_val) { |
1170 | case 0: |
1171 | data->pwm_settings[attr->index][0] &= |
1172 | ~ABIT_UGURU_FAN_PWM_ENABLE; |
1173 | break; |
1174 | case 2: |
1175 | data->pwm_settings[attr->index][0] |= ABIT_UGURU_FAN_PWM_ENABLE; |
1176 | break; |
1177 | default: |
1178 | ret = -EINVAL; |
1179 | } |
1180 | if ((data->pwm_settings[attr->index][0] != orig_val) && |
1181 | (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1, |
1182 | attr->index, data->pwm_settings[attr->index], |
1183 | 5) < 1)) { |
1184 | data->pwm_settings[attr->index][0] = orig_val; |
1185 | ret = -EIO; |
1186 | } |
1187 | mutex_unlock(&data->update_lock); |
1188 | return ret; |
1189 | } |
1190 | |
1191 | static ssize_t show_name(struct device *dev, |
1192 | struct device_attribute *devattr, char *buf) |
1193 | { |
1194 | return sprintf(buf, "%s\n", ABIT_UGURU_NAME); |
1195 | } |
1196 | |
1197 | /* Sysfs attr templates, the real entries are generated automatically. */ |
1198 | static const |
1199 | struct sensor_device_attribute_2 abituguru_sysfs_bank1_templ[2][9] = { |
1200 | { |
1201 | SENSOR_ATTR_2(in%d_input, 0444, show_bank1_value, NULL, 0, 0), |
1202 | SENSOR_ATTR_2(in%d_min, 0644, show_bank1_setting, |
1203 | store_bank1_setting, 1, 0), |
1204 | SENSOR_ATTR_2(in%d_min_alarm, 0444, show_bank1_alarm, NULL, |
1205 | ABIT_UGURU_VOLT_LOW_ALARM_FLAG, 0), |
1206 | SENSOR_ATTR_2(in%d_max, 0644, show_bank1_setting, |
1207 | store_bank1_setting, 2, 0), |
1208 | SENSOR_ATTR_2(in%d_max_alarm, 0444, show_bank1_alarm, NULL, |
1209 | ABIT_UGURU_VOLT_HIGH_ALARM_FLAG, 0), |
1210 | SENSOR_ATTR_2(in%d_beep, 0644, show_bank1_mask, |
1211 | store_bank1_mask, ABIT_UGURU_BEEP_ENABLE, 0), |
1212 | SENSOR_ATTR_2(in%d_shutdown, 0644, show_bank1_mask, |
1213 | store_bank1_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0), |
1214 | SENSOR_ATTR_2(in%d_min_alarm_enable, 0644, show_bank1_mask, |
1215 | store_bank1_mask, ABIT_UGURU_VOLT_LOW_ALARM_ENABLE, 0), |
1216 | SENSOR_ATTR_2(in%d_max_alarm_enable, 0644, show_bank1_mask, |
1217 | store_bank1_mask, ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE, 0), |
1218 | }, { |
1219 | SENSOR_ATTR_2(temp%d_input, 0444, show_bank1_value, NULL, 0, 0), |
1220 | SENSOR_ATTR_2(temp%d_alarm, 0444, show_bank1_alarm, NULL, |
1221 | ABIT_UGURU_TEMP_HIGH_ALARM_FLAG, 0), |
1222 | SENSOR_ATTR_2(temp%d_max, 0644, show_bank1_setting, |
1223 | store_bank1_setting, 1, 0), |
1224 | SENSOR_ATTR_2(temp%d_crit, 0644, show_bank1_setting, |
1225 | store_bank1_setting, 2, 0), |
1226 | SENSOR_ATTR_2(temp%d_beep, 0644, show_bank1_mask, |
1227 | store_bank1_mask, ABIT_UGURU_BEEP_ENABLE, 0), |
1228 | SENSOR_ATTR_2(temp%d_shutdown, 0644, show_bank1_mask, |
1229 | store_bank1_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0), |
1230 | SENSOR_ATTR_2(temp%d_alarm_enable, 0644, show_bank1_mask, |
1231 | store_bank1_mask, ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE, 0), |
1232 | } |
1233 | }; |
1234 | |
1235 | static const struct sensor_device_attribute_2 abituguru_sysfs_fan_templ[6] = { |
1236 | SENSOR_ATTR_2(fan%d_input, 0444, show_bank2_value, NULL, 0, 0), |
1237 | SENSOR_ATTR_2(fan%d_alarm, 0444, show_bank2_alarm, NULL, 0, 0), |
1238 | SENSOR_ATTR_2(fan%d_min, 0644, show_bank2_setting, |
1239 | store_bank2_setting, 1, 0), |
1240 | SENSOR_ATTR_2(fan%d_beep, 0644, show_bank2_mask, |
1241 | store_bank2_mask, ABIT_UGURU_BEEP_ENABLE, 0), |
1242 | SENSOR_ATTR_2(fan%d_shutdown, 0644, show_bank2_mask, |
1243 | store_bank2_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0), |
1244 | SENSOR_ATTR_2(fan%d_alarm_enable, 0644, show_bank2_mask, |
1245 | store_bank2_mask, ABIT_UGURU_FAN_LOW_ALARM_ENABLE, 0), |
1246 | }; |
1247 | |
1248 | static const struct sensor_device_attribute_2 abituguru_sysfs_pwm_templ[6] = { |
1249 | SENSOR_ATTR_2(pwm%d_enable, 0644, show_pwm_enable, |
1250 | store_pwm_enable, 0, 0), |
1251 | SENSOR_ATTR_2(pwm%d_auto_channels_temp, 0644, show_pwm_sensor, |
1252 | store_pwm_sensor, 0, 0), |
1253 | SENSOR_ATTR_2(pwm%d_auto_point1_pwm, 0644, show_pwm_setting, |
1254 | store_pwm_setting, 1, 0), |
1255 | SENSOR_ATTR_2(pwm%d_auto_point2_pwm, 0644, show_pwm_setting, |
1256 | store_pwm_setting, 2, 0), |
1257 | SENSOR_ATTR_2(pwm%d_auto_point1_temp, 0644, show_pwm_setting, |
1258 | store_pwm_setting, 3, 0), |
1259 | SENSOR_ATTR_2(pwm%d_auto_point2_temp, 0644, show_pwm_setting, |
1260 | store_pwm_setting, 4, 0), |
1261 | }; |
1262 | |
1263 | static struct sensor_device_attribute_2 abituguru_sysfs_attr[] = { |
1264 | SENSOR_ATTR_2(name, 0444, show_name, NULL, 0, 0), |
1265 | }; |
1266 | |
1267 | static int abituguru_probe(struct platform_device *pdev) |
1268 | { |
1269 | struct abituguru_data *data; |
1270 | int i, j, used, sysfs_names_free, sysfs_attr_i, res = -ENODEV; |
1271 | char *sysfs_filename; |
1272 | |
1273 | /* |
1274 | * El weirdo probe order, to keep the sysfs order identical to the |
1275 | * BIOS and window-appliction listing order. |
1276 | */ |
1277 | const u8 probe_order[ABIT_UGURU_MAX_BANK1_SENSORS] = { |
1278 | 0x00, 0x01, 0x03, 0x04, 0x0A, 0x08, 0x0E, 0x02, |
1279 | 0x09, 0x06, 0x05, 0x0B, 0x0F, 0x0D, 0x07, 0x0C }; |
1280 | |
1281 | data = devm_kzalloc(&pdev->dev, sizeof(struct abituguru_data), |
1282 | GFP_KERNEL); |
1283 | if (!data) |
1284 | return -ENOMEM; |
1285 | |
1286 | data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start; |
1287 | mutex_init(&data->update_lock); |
1288 | platform_set_drvdata(pdev, data); |
1289 | |
1290 | /* See if the uGuru is ready */ |
1291 | if (inb_p(data->addr + ABIT_UGURU_DATA) == ABIT_UGURU_STATUS_INPUT) |
1292 | data->uguru_ready = 1; |
1293 | |
1294 | /* |
1295 | * Completely read the uGuru this has 2 purposes: |
1296 | * - testread / see if one really is there. |
1297 | * - make an in memory copy of all the uguru settings for future use. |
1298 | */ |
1299 | if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, |
1300 | data->alarms, 3, ABIT_UGURU_MAX_RETRIES) != 3) |
1301 | goto abituguru_probe_error; |
1302 | |
1303 | for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) { |
1304 | if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1, i, |
1305 | &data->bank1_value[i], 1, |
1306 | ABIT_UGURU_MAX_RETRIES) != 1) |
1307 | goto abituguru_probe_error; |
1308 | if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1+1, i, |
1309 | data->bank1_settings[i], 3, |
1310 | ABIT_UGURU_MAX_RETRIES) != 3) |
1311 | goto abituguru_probe_error; |
1312 | } |
1313 | /* |
1314 | * Note: We don't know how many bank2 sensors / pwms there really are, |
1315 | * but in order to "detect" this we need to read the maximum amount |
1316 | * anyways. If we read sensors/pwms not there we'll just read crap |
1317 | * this can't hurt. We need the detection because we don't want |
1318 | * unwanted writes, which will hurt! |
1319 | */ |
1320 | for (i = 0; i < ABIT_UGURU_MAX_BANK2_SENSORS; i++) { |
1321 | if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK2, i, |
1322 | &data->bank2_value[i], 1, |
1323 | ABIT_UGURU_MAX_RETRIES) != 1) |
1324 | goto abituguru_probe_error; |
1325 | if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK2+1, i, |
1326 | data->bank2_settings[i], 2, |
1327 | ABIT_UGURU_MAX_RETRIES) != 2) |
1328 | goto abituguru_probe_error; |
1329 | } |
1330 | for (i = 0; i < ABIT_UGURU_MAX_PWMS; i++) { |
1331 | if (abituguru_read(data, ABIT_UGURU_FAN_PWM, i, |
1332 | data->pwm_settings[i], 5, |
1333 | ABIT_UGURU_MAX_RETRIES) != 5) |
1334 | goto abituguru_probe_error; |
1335 | } |
1336 | data->last_updated = jiffies; |
1337 | |
1338 | /* Detect sensor types and fill the sysfs attr for bank1 */ |
1339 | sysfs_attr_i = 0; |
1340 | sysfs_filename = data->sysfs_names; |
1341 | sysfs_names_free = ABITUGURU_SYSFS_NAMES_LENGTH; |
1342 | for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) { |
1343 | res = abituguru_detect_bank1_sensor_type(data, probe_order[i]); |
1344 | if (res < 0) |
1345 | goto abituguru_probe_error; |
1346 | if (res == ABIT_UGURU_NC) |
1347 | continue; |
1348 | |
1349 | /* res 1 (temp) sensors have 7 sysfs entries, 0 (in) 9 */ |
1350 | for (j = 0; j < (res ? 7 : 9); j++) { |
1351 | used = snprintf(sysfs_filename, sysfs_names_free, |
1352 | abituguru_sysfs_bank1_templ[res][j].dev_attr. |
1353 | attr.name, data->bank1_sensors[res] + res) |
1354 | + 1; |
1355 | data->sysfs_attr[sysfs_attr_i] = |
1356 | abituguru_sysfs_bank1_templ[res][j]; |
1357 | data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name = |
1358 | sysfs_filename; |
1359 | data->sysfs_attr[sysfs_attr_i].index = probe_order[i]; |
1360 | sysfs_filename += used; |
1361 | sysfs_names_free -= used; |
1362 | sysfs_attr_i++; |
1363 | } |
1364 | data->bank1_max_value[probe_order[i]] = |
1365 | abituguru_bank1_max_value[res]; |
1366 | data->bank1_address[res][data->bank1_sensors[res]] = |
1367 | probe_order[i]; |
1368 | data->bank1_sensors[res]++; |
1369 | } |
1370 | /* Detect number of sensors and fill the sysfs attr for bank2 (fans) */ |
1371 | abituguru_detect_no_bank2_sensors(data); |
1372 | for (i = 0; i < data->bank2_sensors; i++) { |
1373 | for (j = 0; j < ARRAY_SIZE(abituguru_sysfs_fan_templ); j++) { |
1374 | used = snprintf(sysfs_filename, sysfs_names_free, |
1375 | abituguru_sysfs_fan_templ[j].dev_attr.attr.name, |
1376 | i + 1) + 1; |
1377 | data->sysfs_attr[sysfs_attr_i] = |
1378 | abituguru_sysfs_fan_templ[j]; |
1379 | data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name = |
1380 | sysfs_filename; |
1381 | data->sysfs_attr[sysfs_attr_i].index = i; |
1382 | sysfs_filename += used; |
1383 | sysfs_names_free -= used; |
1384 | sysfs_attr_i++; |
1385 | } |
1386 | } |
1387 | /* Detect number of sensors and fill the sysfs attr for pwms */ |
1388 | abituguru_detect_no_pwms(data); |
1389 | for (i = 0; i < data->pwms; i++) { |
1390 | for (j = 0; j < ARRAY_SIZE(abituguru_sysfs_pwm_templ); j++) { |
1391 | used = snprintf(sysfs_filename, sysfs_names_free, |
1392 | abituguru_sysfs_pwm_templ[j].dev_attr.attr.name, |
1393 | i + 1) + 1; |
1394 | data->sysfs_attr[sysfs_attr_i] = |
1395 | abituguru_sysfs_pwm_templ[j]; |
1396 | data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name = |
1397 | sysfs_filename; |
1398 | data->sysfs_attr[sysfs_attr_i].index = i; |
1399 | sysfs_filename += used; |
1400 | sysfs_names_free -= used; |
1401 | sysfs_attr_i++; |
1402 | } |
1403 | } |
1404 | /* Fail safe check, this should never happen! */ |
1405 | if (sysfs_names_free < 0) { |
1406 | pr_err("Fatal error ran out of space for sysfs attr names. %s %s", |
1407 | never_happen, report_this); |
1408 | res = -ENAMETOOLONG; |
1409 | goto abituguru_probe_error; |
1410 | } |
1411 | pr_info("found Abit uGuru\n"); |
1412 | |
1413 | /* Register sysfs hooks */ |
1414 | for (i = 0; i < sysfs_attr_i; i++) |
1415 | if (device_create_file(&pdev->dev, |
1416 | &data->sysfs_attr[i].dev_attr)) |
1417 | goto abituguru_probe_error; |
1418 | for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++) |
1419 | if (device_create_file(&pdev->dev, |
1420 | &abituguru_sysfs_attr[i].dev_attr)) |
1421 | goto abituguru_probe_error; |
1422 | |
1423 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
1424 | if (!IS_ERR(data->hwmon_dev)) |
1425 | return 0; /* success */ |
1426 | |
1427 | res = PTR_ERR(data->hwmon_dev); |
1428 | abituguru_probe_error: |
1429 | for (i = 0; data->sysfs_attr[i].dev_attr.attr.name; i++) |
1430 | device_remove_file(&pdev->dev, &data->sysfs_attr[i].dev_attr); |
1431 | for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++) |
1432 | device_remove_file(&pdev->dev, |
1433 | &abituguru_sysfs_attr[i].dev_attr); |
1434 | return res; |
1435 | } |
1436 | |
1437 | static int abituguru_remove(struct platform_device *pdev) |
1438 | { |
1439 | int i; |
1440 | struct abituguru_data *data = platform_get_drvdata(pdev); |
1441 | |
1442 | hwmon_device_unregister(data->hwmon_dev); |
1443 | for (i = 0; data->sysfs_attr[i].dev_attr.attr.name; i++) |
1444 | device_remove_file(&pdev->dev, &data->sysfs_attr[i].dev_attr); |
1445 | for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++) |
1446 | device_remove_file(&pdev->dev, |
1447 | &abituguru_sysfs_attr[i].dev_attr); |
1448 | |
1449 | return 0; |
1450 | } |
1451 | |
1452 | static struct abituguru_data *abituguru_update_device(struct device *dev) |
1453 | { |
1454 | int i, err; |
1455 | struct abituguru_data *data = dev_get_drvdata(dev); |
1456 | /* fake a complete successful read if no update necessary. */ |
1457 | char success = 1; |
1458 | |
1459 | mutex_lock(&data->update_lock); |
1460 | if (time_after(jiffies, data->last_updated + HZ)) { |
1461 | success = 0; |
1462 | err = abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, |
1463 | data->alarms, 3, 0); |
1464 | if (err != 3) |
1465 | goto LEAVE_UPDATE; |
1466 | for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) { |
1467 | err = abituguru_read(data, ABIT_UGURU_SENSOR_BANK1, |
1468 | i, &data->bank1_value[i], 1, 0); |
1469 | if (err != 1) |
1470 | goto LEAVE_UPDATE; |
1471 | err = abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1, |
1472 | i, data->bank1_settings[i], 3, 0); |
1473 | if (err != 3) |
1474 | goto LEAVE_UPDATE; |
1475 | } |
1476 | for (i = 0; i < data->bank2_sensors; i++) { |
1477 | err = abituguru_read(data, ABIT_UGURU_SENSOR_BANK2, i, |
1478 | &data->bank2_value[i], 1, 0); |
1479 | if (err != 1) |
1480 | goto LEAVE_UPDATE; |
1481 | } |
1482 | /* success! */ |
1483 | success = 1; |
1484 | data->update_timeouts = 0; |
1485 | LEAVE_UPDATE: |
1486 | /* handle timeout condition */ |
1487 | if (!success && (err == -EBUSY || err >= 0)) { |
1488 | /* No overflow please */ |
1489 | if (data->update_timeouts < 255u) |
1490 | data->update_timeouts++; |
1491 | if (data->update_timeouts <= ABIT_UGURU_MAX_TIMEOUTS) { |
1492 | ABIT_UGURU_DEBUG(3, "timeout exceeded, will " |
1493 | "try again next update\n"); |
1494 | /* Just a timeout, fake a successful read */ |
1495 | success = 1; |
1496 | } else |
1497 | ABIT_UGURU_DEBUG(1, "timeout exceeded %d " |
1498 | "times waiting for more input state\n", |
1499 | (int)data->update_timeouts); |
1500 | } |
1501 | /* On success set last_updated */ |
1502 | if (success) |
1503 | data->last_updated = jiffies; |
1504 | } |
1505 | mutex_unlock(&data->update_lock); |
1506 | |
1507 | if (success) |
1508 | return data; |
1509 | else |
1510 | return NULL; |
1511 | } |
1512 | |
1513 | #ifdef CONFIG_PM_SLEEP |
1514 | static int abituguru_suspend(struct device *dev) |
1515 | { |
1516 | struct abituguru_data *data = dev_get_drvdata(dev); |
1517 | /* |
1518 | * make sure all communications with the uguru are done and no new |
1519 | * ones are started |
1520 | */ |
1521 | mutex_lock(&data->update_lock); |
1522 | return 0; |
1523 | } |
1524 | |
1525 | static int abituguru_resume(struct device *dev) |
1526 | { |
1527 | struct abituguru_data *data = dev_get_drvdata(dev); |
1528 | /* See if the uGuru is still ready */ |
1529 | if (inb_p(data->addr + ABIT_UGURU_DATA) != ABIT_UGURU_STATUS_INPUT) |
1530 | data->uguru_ready = 0; |
1531 | mutex_unlock(&data->update_lock); |
1532 | return 0; |
1533 | } |
1534 | |
1535 | static SIMPLE_DEV_PM_OPS(abituguru_pm, abituguru_suspend, abituguru_resume); |
1536 | #define ABIT_UGURU_PM &abituguru_pm |
1537 | #else |
1538 | #define ABIT_UGURU_PM NULL |
1539 | #endif /* CONFIG_PM */ |
1540 | |
1541 | static struct platform_driver abituguru_driver = { |
1542 | .driver = { |
1543 | .owner = THIS_MODULE, |
1544 | .name = ABIT_UGURU_NAME, |
1545 | .pm = ABIT_UGURU_PM, |
1546 | }, |
1547 | .probe = abituguru_probe, |
1548 | .remove = abituguru_remove, |
1549 | }; |
1550 | |
1551 | static int __init abituguru_detect(void) |
1552 | { |
1553 | /* |
1554 | * See if there is an uguru there. After a reboot uGuru will hold 0x00 |
1555 | * at DATA and 0xAC, when this driver has already been loaded once |
1556 | * DATA will hold 0x08. For most uGuru's CMD will hold 0xAC in either |
1557 | * scenario but some will hold 0x00. |
1558 | * Some uGuru's initially hold 0x09 at DATA and will only hold 0x08 |
1559 | * after reading CMD first, so CMD must be read first! |
1560 | */ |
1561 | u8 cmd_val = inb_p(ABIT_UGURU_BASE + ABIT_UGURU_CMD); |
1562 | u8 data_val = inb_p(ABIT_UGURU_BASE + ABIT_UGURU_DATA); |
1563 | if (((data_val == 0x00) || (data_val == 0x08)) && |
1564 | ((cmd_val == 0x00) || (cmd_val == 0xAC))) |
1565 | return ABIT_UGURU_BASE; |
1566 | |
1567 | ABIT_UGURU_DEBUG(2, "no Abit uGuru found, data = 0x%02X, cmd = " |
1568 | "0x%02X\n", (unsigned int)data_val, (unsigned int)cmd_val); |
1569 | |
1570 | if (force) { |
1571 | pr_info("Assuming Abit uGuru is present because of \"force\" parameter\n"); |
1572 | return ABIT_UGURU_BASE; |
1573 | } |
1574 | |
1575 | /* No uGuru found */ |
1576 | return -ENODEV; |
1577 | } |
1578 | |
1579 | static struct platform_device *abituguru_pdev; |
1580 | |
1581 | static int __init abituguru_init(void) |
1582 | { |
1583 | int address, err; |
1584 | struct resource res = { .flags = IORESOURCE_IO }; |
1585 | const char *board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR); |
1586 | |
1587 | /* safety check, refuse to load on non Abit motherboards */ |
1588 | if (!force && (!board_vendor || |
1589 | strcmp(board_vendor, "http://www.abit.com.tw/"))) |
1590 | return -ENODEV; |
1591 | |
1592 | address = abituguru_detect(); |
1593 | if (address < 0) |
1594 | return address; |
1595 | |
1596 | err = platform_driver_register(&abituguru_driver); |
1597 | if (err) |
1598 | goto exit; |
1599 | |
1600 | abituguru_pdev = platform_device_alloc(ABIT_UGURU_NAME, address); |
1601 | if (!abituguru_pdev) { |
1602 | pr_err("Device allocation failed\n"); |
1603 | err = -ENOMEM; |
1604 | goto exit_driver_unregister; |
1605 | } |
1606 | |
1607 | res.start = address; |
1608 | res.end = address + ABIT_UGURU_REGION_LENGTH - 1; |
1609 | res.name = ABIT_UGURU_NAME; |
1610 | |
1611 | err = platform_device_add_resources(abituguru_pdev, &res, 1); |
1612 | if (err) { |
1613 | pr_err("Device resource addition failed (%d)\n", err); |
1614 | goto exit_device_put; |
1615 | } |
1616 | |
1617 | err = platform_device_add(abituguru_pdev); |
1618 | if (err) { |
1619 | pr_err("Device addition failed (%d)\n", err); |
1620 | goto exit_device_put; |
1621 | } |
1622 | |
1623 | return 0; |
1624 | |
1625 | exit_device_put: |
1626 | platform_device_put(abituguru_pdev); |
1627 | exit_driver_unregister: |
1628 | platform_driver_unregister(&abituguru_driver); |
1629 | exit: |
1630 | return err; |
1631 | } |
1632 | |
1633 | static void __exit abituguru_exit(void) |
1634 | { |
1635 | platform_device_unregister(abituguru_pdev); |
1636 | platform_driver_unregister(&abituguru_driver); |
1637 | } |
1638 | |
1639 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); |
1640 | MODULE_DESCRIPTION("Abit uGuru Sensor device"); |
1641 | MODULE_LICENSE("GPL"); |
1642 | |
1643 | module_init(abituguru_init); |
1644 | module_exit(abituguru_exit); |
1645 |
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