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Hans de Goedef2b84bb2006-06-04 20:22:24 +02001/*
Hans de Goede93d0cc52011-03-21 17:59:36 +01002 abituguru.c Copyright (c) 2005-2006 Hans de Goede <hdegoede@redhat.com>
Hans de Goedef2b84bb2006-06-04 20:22:24 +02003
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/*
Hans de Goede3faa1ff2007-06-17 00:28:45 +020019 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!
Hans de Goedef2b84bb2006-06-04 20:22:24 +020022*/
Joe Perches28ebfa12010-10-20 06:51:25 +000023
24#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
Hans de Goedef2b84bb2006-06-04 20:22:24 +020026#include <linux/module.h>
Al Virof6a57032006-10-18 01:47:25 -040027#include <linux/sched.h>
Hans de Goedef2b84bb2006-06-04 20:22:24 +020028#include <linux/init.h>
29#include <linux/slab.h>
30#include <linux/jiffies.h>
31#include <linux/mutex.h>
32#include <linux/err.h>
Hans de Goedefaf9b612006-08-25 10:24:20 +020033#include <linux/delay.h>
Hans de Goedef2b84bb2006-06-04 20:22:24 +020034#include <linux/platform_device.h>
35#include <linux/hwmon.h>
36#include <linux/hwmon-sysfs.h>
Hans de Goedec182f5b2007-07-10 17:09:57 +020037#include <linux/dmi.h>
H Hartley Sweeten6055fae2009-09-15 17:18:13 +020038#include <linux/io.h>
Hans de Goedef2b84bb2006-06-04 20:22:24 +020039
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 */
Hans de Goedea2392e02006-06-04 20:23:01 +020045/* max nr of sensors in bank1, a bank1 sensor can be in, temp or nc */
46#define ABIT_UGURU_MAX_BANK1_SENSORS 16
47/* Warning if you increase one of the 2 MAX defines below to 10 or higher you
48 should adjust the belonging _NAMES_LENGTH macro for the 2 digit number! */
Hans de Goedef2b84bb2006-06-04 20:22:24 +020049/* max nr of sensors in bank2, currently mb's with max 6 fans are known */
50#define ABIT_UGURU_MAX_BANK2_SENSORS 6
51/* max nr of pwm outputs, currently mb's with max 5 pwm outputs are known */
52#define ABIT_UGURU_MAX_PWMS 5
53/* uGuru sensor bank 1 flags */ /* Alarm if: */
54#define ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE 0x01 /* temp over warn */
55#define ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE 0x02 /* volt over max */
56#define ABIT_UGURU_VOLT_LOW_ALARM_ENABLE 0x04 /* volt under min */
57#define ABIT_UGURU_TEMP_HIGH_ALARM_FLAG 0x10 /* temp is over warn */
58#define ABIT_UGURU_VOLT_HIGH_ALARM_FLAG 0x20 /* volt is over max */
59#define ABIT_UGURU_VOLT_LOW_ALARM_FLAG 0x40 /* volt is under min */
60/* uGuru sensor bank 2 flags */ /* Alarm if: */
61#define ABIT_UGURU_FAN_LOW_ALARM_ENABLE 0x01 /* fan under min */
62/* uGuru sensor bank common flags */
63#define ABIT_UGURU_BEEP_ENABLE 0x08 /* beep if alarm */
64#define ABIT_UGURU_SHUTDOWN_ENABLE 0x80 /* shutdown if alarm */
65/* uGuru fan PWM (speed control) flags */
66#define ABIT_UGURU_FAN_PWM_ENABLE 0x80 /* enable speed control */
67/* Values used for conversion */
68#define ABIT_UGURU_FAN_MAX 15300 /* RPM */
69/* Bank1 sensor types */
70#define ABIT_UGURU_IN_SENSOR 0
71#define ABIT_UGURU_TEMP_SENSOR 1
72#define ABIT_UGURU_NC 2
Hans de Goedefaf9b612006-08-25 10:24:20 +020073/* In many cases we need to wait for the uGuru to reach a certain status, most
74 of the time it will reach this status within 30 - 90 ISA reads, and thus we
75 can best busy wait. This define gives the total amount of reads to try. */
76#define ABIT_UGURU_WAIT_TIMEOUT 125
77/* However sometimes older versions of the uGuru seem to be distracted and they
78 do not respond for a long time. To handle this we sleep before each of the
79 last ABIT_UGURU_WAIT_TIMEOUT_SLEEP tries. */
80#define ABIT_UGURU_WAIT_TIMEOUT_SLEEP 5
Hans de Goedef2b84bb2006-06-04 20:22:24 +020081/* Normally all expected status in abituguru_ready, are reported after the
Hans de Goedefaf9b612006-08-25 10:24:20 +020082 first read, but sometimes not and we need to poll. */
83#define ABIT_UGURU_READY_TIMEOUT 5
Hans de Goedef2b84bb2006-06-04 20:22:24 +020084/* Maximum 3 retries on timedout reads/writes, delay 200 ms before retrying */
85#define ABIT_UGURU_MAX_RETRIES 3
86#define ABIT_UGURU_RETRY_DELAY (HZ/5)
Hans de Goedea2392e02006-06-04 20:23:01 +020087/* Maximum 2 timeouts in abituguru_update_device, iow 3 in a row is an error */
Hans de Goedef2b84bb2006-06-04 20:22:24 +020088#define ABIT_UGURU_MAX_TIMEOUTS 2
Hans de Goedea2392e02006-06-04 20:23:01 +020089/* utility macros */
90#define ABIT_UGURU_NAME "abituguru"
91#define ABIT_UGURU_DEBUG(level, format, arg...) \
92 if (level <= verbose) \
93 printk(KERN_DEBUG ABIT_UGURU_NAME ": " format , ## arg)
94/* Macros to help calculate the sysfs_names array length */
95/* sum of strlen of: in??_input\0, in??_{min,max}\0, in??_{min,max}_alarm\0,
96 in??_{min,max}_alarm_enable\0, in??_beep\0, in??_shutdown\0 */
97#define ABITUGURU_IN_NAMES_LENGTH (11 + 2 * 9 + 2 * 15 + 2 * 22 + 10 + 14)
98/* sum of strlen of: temp??_input\0, temp??_max\0, temp??_crit\0,
99 temp??_alarm\0, temp??_alarm_enable\0, temp??_beep\0, temp??_shutdown\0 */
100#define ABITUGURU_TEMP_NAMES_LENGTH (13 + 11 + 12 + 13 + 20 + 12 + 16)
101/* sum of strlen of: fan?_input\0, fan?_min\0, fan?_alarm\0,
102 fan?_alarm_enable\0, fan?_beep\0, fan?_shutdown\0 */
103#define ABITUGURU_FAN_NAMES_LENGTH (11 + 9 + 11 + 18 + 10 + 14)
104/* sum of strlen of: pwm?_enable\0, pwm?_auto_channels_temp\0,
105 pwm?_auto_point{1,2}_pwm\0, pwm?_auto_point{1,2}_temp\0 */
106#define ABITUGURU_PWM_NAMES_LENGTH (12 + 24 + 2 * 21 + 2 * 22)
107/* IN_NAMES_LENGTH > TEMP_NAMES_LENGTH so assume all bank1 sensors are in */
108#define ABITUGURU_SYSFS_NAMES_LENGTH ( \
109 ABIT_UGURU_MAX_BANK1_SENSORS * ABITUGURU_IN_NAMES_LENGTH + \
110 ABIT_UGURU_MAX_BANK2_SENSORS * ABITUGURU_FAN_NAMES_LENGTH + \
111 ABIT_UGURU_MAX_PWMS * ABITUGURU_PWM_NAMES_LENGTH)
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200112
Hans de Goedea2392e02006-06-04 20:23:01 +0200113/* All the macros below are named identical to the oguru and oguru2 programs
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200114 reverse engineered by Olle Sandberg, hence the names might not be 100%
115 logical. I could come up with better names, but I prefer keeping the names
116 identical so that this driver can be compared with his work more easily. */
117/* Two i/o-ports are used by uGuru */
118#define ABIT_UGURU_BASE 0x00E0
119/* Used to tell uGuru what to read and to read the actual data */
120#define ABIT_UGURU_CMD 0x00
121/* Mostly used to check if uGuru is busy */
122#define ABIT_UGURU_DATA 0x04
123#define ABIT_UGURU_REGION_LENGTH 5
124/* uGuru status' */
125#define ABIT_UGURU_STATUS_WRITE 0x00 /* Ready to be written */
126#define ABIT_UGURU_STATUS_READ 0x01 /* Ready to be read */
127#define ABIT_UGURU_STATUS_INPUT 0x08 /* More input */
128#define ABIT_UGURU_STATUS_READY 0x09 /* Ready to be written */
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200129
130/* Constants */
131/* in (Volt) sensors go up to 3494 mV, temp to 255000 millidegrees Celsius */
132static const int abituguru_bank1_max_value[2] = { 3494, 255000 };
133/* Min / Max allowed values for sensor2 (fan) alarm threshold, these values
134 correspond to 300-3000 RPM */
135static const u8 abituguru_bank2_min_threshold = 5;
136static const u8 abituguru_bank2_max_threshold = 50;
137/* Register 0 is a bitfield, 1 and 2 are pwm settings (255 = 100%), 3 and 4
138 are temperature trip points. */
139static const int abituguru_pwm_settings_multiplier[5] = { 0, 1, 1, 1000, 1000 };
140/* Min / Max allowed values for pwm_settings. Note: pwm1 (CPU fan) is a
141 special case the minium allowed pwm% setting for this is 30% (77) on
142 some MB's this special case is handled in the code! */
143static const u8 abituguru_pwm_min[5] = { 0, 170, 170, 25, 25 };
144static const u8 abituguru_pwm_max[5] = { 0, 255, 255, 75, 75 };
145
146
147/* Insmod parameters */
148static int force;
149module_param(force, bool, 0);
150MODULE_PARM_DESC(force, "Set to one to force detection.");
Hans de Goede9b2ad122006-07-05 18:07:49 +0200151static int bank1_types[ABIT_UGURU_MAX_BANK1_SENSORS] = { -1, -1, -1, -1, -1,
152 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };
153module_param_array(bank1_types, int, NULL, 0);
154MODULE_PARM_DESC(bank1_types, "Bank1 sensortype autodetection override:\n"
155 " -1 autodetect\n"
156 " 0 volt sensor\n"
157 " 1 temp sensor\n"
158 " 2 not connected");
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200159static int fan_sensors;
160module_param(fan_sensors, int, 0);
161MODULE_PARM_DESC(fan_sensors, "Number of fan sensors on the uGuru "
162 "(0 = autodetect)");
163static int pwms;
164module_param(pwms, int, 0);
165MODULE_PARM_DESC(pwms, "Number of PWMs on the uGuru "
166 "(0 = autodetect)");
167
168/* Default verbose is 2, since this driver is still in the testing phase */
169static int verbose = 2;
170module_param(verbose, int, 0644);
171MODULE_PARM_DESC(verbose, "How verbose should the driver be? (0-3):\n"
172 " 0 normal output\n"
173 " 1 + verbose error reporting\n"
174 " 2 + sensors type probing info\n"
175 " 3 + retryable error reporting");
176
177
178/* For the Abit uGuru, we need to keep some data in memory.
179 The structure is dynamically allocated, at the same time when a new
180 abituguru device is allocated. */
181struct abituguru_data {
Tony Jones1beeffe2007-08-20 13:46:20 -0700182 struct device *hwmon_dev; /* hwmon registered device */
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200183 struct mutex update_lock; /* protect access to data and uGuru */
184 unsigned long last_updated; /* In jiffies */
185 unsigned short addr; /* uguru base address */
186 char uguru_ready; /* is the uguru in ready state? */
187 unsigned char update_timeouts; /* number of update timeouts since last
188 successful update */
189
190 /* The sysfs attr and their names are generated automatically, for bank1
191 we cannot use a predefined array because we don't know beforehand
192 of a sensor is a volt or a temp sensor, for bank2 and the pwms its
193 easier todo things the same way. For in sensors we have 9 (temp 7)
194 sysfs entries per sensor, for bank2 and pwms 6. */
Hans de Goedea2392e02006-06-04 20:23:01 +0200195 struct sensor_device_attribute_2 sysfs_attr[
196 ABIT_UGURU_MAX_BANK1_SENSORS * 9 +
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200197 ABIT_UGURU_MAX_BANK2_SENSORS * 6 + ABIT_UGURU_MAX_PWMS * 6];
Hans de Goedea2392e02006-06-04 20:23:01 +0200198 /* Buffer to store the dynamically generated sysfs names */
199 char sysfs_names[ABITUGURU_SYSFS_NAMES_LENGTH];
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200200
201 /* Bank 1 data */
Hans de Goedea2392e02006-06-04 20:23:01 +0200202 /* number of and addresses of [0] in, [1] temp sensors */
203 u8 bank1_sensors[2];
204 u8 bank1_address[2][ABIT_UGURU_MAX_BANK1_SENSORS];
205 u8 bank1_value[ABIT_UGURU_MAX_BANK1_SENSORS];
206 /* This array holds 3 entries per sensor for the bank 1 sensor settings
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200207 (flags, min, max for voltage / flags, warn, shutdown for temp). */
Hans de Goedea2392e02006-06-04 20:23:01 +0200208 u8 bank1_settings[ABIT_UGURU_MAX_BANK1_SENSORS][3];
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200209 /* Maximum value for each sensor used for scaling in mV/millidegrees
210 Celsius. */
Hans de Goedea2392e02006-06-04 20:23:01 +0200211 int bank1_max_value[ABIT_UGURU_MAX_BANK1_SENSORS];
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200212
213 /* Bank 2 data, ABIT_UGURU_MAX_BANK2_SENSORS entries for bank2 */
214 u8 bank2_sensors; /* actual number of bank2 sensors found */
215 u8 bank2_value[ABIT_UGURU_MAX_BANK2_SENSORS];
216 u8 bank2_settings[ABIT_UGURU_MAX_BANK2_SENSORS][2]; /* flags, min */
217
218 /* Alarms 2 bytes for bank1, 1 byte for bank2 */
219 u8 alarms[3];
220
221 /* Fan PWM (speed control) 5 bytes per PWM */
222 u8 pwms; /* actual number of pwms found */
223 u8 pwm_settings[ABIT_UGURU_MAX_PWMS][5];
224};
225
Joe Perches28ebfa12010-10-20 06:51:25 +0000226static const char *never_happen = "This should never happen.";
227static const char *report_this =
228 "Please report this to the abituguru maintainer (see MAINTAINERS)";
229
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200230/* wait till the uguru is in the specified state */
231static int abituguru_wait(struct abituguru_data *data, u8 state)
232{
233 int timeout = ABIT_UGURU_WAIT_TIMEOUT;
234
235 while (inb_p(data->addr + ABIT_UGURU_DATA) != state) {
236 timeout--;
237 if (timeout == 0)
238 return -EBUSY;
Hans de Goedefaf9b612006-08-25 10:24:20 +0200239 /* sleep a bit before our last few tries, see the comment on
240 this where ABIT_UGURU_WAIT_TIMEOUT_SLEEP is defined. */
241 if (timeout <= ABIT_UGURU_WAIT_TIMEOUT_SLEEP)
242 msleep(0);
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200243 }
244 return 0;
245}
246
247/* Put the uguru in ready for input state */
248static int abituguru_ready(struct abituguru_data *data)
249{
250 int timeout = ABIT_UGURU_READY_TIMEOUT;
251
252 if (data->uguru_ready)
253 return 0;
254
255 /* Reset? / Prepare for next read/write cycle */
256 outb(0x00, data->addr + ABIT_UGURU_DATA);
257
258 /* Wait till the uguru is ready */
259 if (abituguru_wait(data, ABIT_UGURU_STATUS_READY)) {
260 ABIT_UGURU_DEBUG(1,
261 "timeout exceeded waiting for ready state\n");
262 return -EIO;
263 }
264
265 /* Cmd port MUST be read now and should contain 0xAC */
266 while (inb_p(data->addr + ABIT_UGURU_CMD) != 0xAC) {
267 timeout--;
268 if (timeout == 0) {
269 ABIT_UGURU_DEBUG(1,
270 "CMD reg does not hold 0xAC after ready command\n");
271 return -EIO;
272 }
Hans de Goedefaf9b612006-08-25 10:24:20 +0200273 msleep(0);
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200274 }
275
276 /* After this the ABIT_UGURU_DATA port should contain
277 ABIT_UGURU_STATUS_INPUT */
278 timeout = ABIT_UGURU_READY_TIMEOUT;
279 while (inb_p(data->addr + ABIT_UGURU_DATA) != ABIT_UGURU_STATUS_INPUT) {
280 timeout--;
281 if (timeout == 0) {
282 ABIT_UGURU_DEBUG(1,
283 "state != more input after ready command\n");
284 return -EIO;
285 }
Hans de Goedefaf9b612006-08-25 10:24:20 +0200286 msleep(0);
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200287 }
288
289 data->uguru_ready = 1;
290 return 0;
291}
292
293/* Send the bank and then sensor address to the uGuru for the next read/write
294 cycle. This function gets called as the first part of a read/write by
295 abituguru_read and abituguru_write. This function should never be
296 called by any other function. */
297static int abituguru_send_address(struct abituguru_data *data,
298 u8 bank_addr, u8 sensor_addr, int retries)
299{
300 /* assume the caller does error handling itself if it has not requested
301 any retries, and thus be quiet. */
302 int report_errors = retries;
303
304 for (;;) {
305 /* Make sure the uguru is ready and then send the bank address,
306 after this the uguru is no longer "ready". */
307 if (abituguru_ready(data) != 0)
308 return -EIO;
309 outb(bank_addr, data->addr + ABIT_UGURU_DATA);
310 data->uguru_ready = 0;
311
312 /* Wait till the uguru is ABIT_UGURU_STATUS_INPUT state again
313 and send the sensor addr */
314 if (abituguru_wait(data, ABIT_UGURU_STATUS_INPUT)) {
315 if (retries) {
316 ABIT_UGURU_DEBUG(3, "timeout exceeded "
317 "waiting for more input state, %d "
318 "tries remaining\n", retries);
319 set_current_state(TASK_UNINTERRUPTIBLE);
320 schedule_timeout(ABIT_UGURU_RETRY_DELAY);
321 retries--;
322 continue;
323 }
324 if (report_errors)
325 ABIT_UGURU_DEBUG(1, "timeout exceeded "
326 "waiting for more input state "
327 "(bank: %d)\n", (int)bank_addr);
328 return -EBUSY;
329 }
330 outb(sensor_addr, data->addr + ABIT_UGURU_CMD);
331 return 0;
332 }
333}
334
335/* Read count bytes from sensor sensor_addr in bank bank_addr and store the
336 result in buf, retry the send address part of the read retries times. */
337static int abituguru_read(struct abituguru_data *data,
338 u8 bank_addr, u8 sensor_addr, u8 *buf, int count, int retries)
339{
340 int i;
341
342 /* Send the address */
343 i = abituguru_send_address(data, bank_addr, sensor_addr, retries);
344 if (i)
345 return i;
346
347 /* And read the data */
348 for (i = 0; i < count; i++) {
349 if (abituguru_wait(data, ABIT_UGURU_STATUS_READ)) {
Hans de Goedefaf9b612006-08-25 10:24:20 +0200350 ABIT_UGURU_DEBUG(retries ? 1 : 3,
351 "timeout exceeded waiting for "
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200352 "read state (bank: %d, sensor: %d)\n",
353 (int)bank_addr, (int)sensor_addr);
354 break;
355 }
356 buf[i] = inb(data->addr + ABIT_UGURU_CMD);
357 }
358
359 /* Last put the chip back in ready state */
360 abituguru_ready(data);
361
362 return i;
363}
364
365/* Write count bytes from buf to sensor sensor_addr in bank bank_addr, the send
366 address part of the write is always retried ABIT_UGURU_MAX_RETRIES times. */
367static int abituguru_write(struct abituguru_data *data,
368 u8 bank_addr, u8 sensor_addr, u8 *buf, int count)
369{
Hans de Goedefaf9b612006-08-25 10:24:20 +0200370 /* We use the ready timeout as we have to wait for 0xAC just like the
371 ready function */
372 int i, timeout = ABIT_UGURU_READY_TIMEOUT;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200373
374 /* Send the address */
375 i = abituguru_send_address(data, bank_addr, sensor_addr,
376 ABIT_UGURU_MAX_RETRIES);
377 if (i)
378 return i;
379
380 /* And write the data */
381 for (i = 0; i < count; i++) {
382 if (abituguru_wait(data, ABIT_UGURU_STATUS_WRITE)) {
383 ABIT_UGURU_DEBUG(1, "timeout exceeded waiting for "
384 "write state (bank: %d, sensor: %d)\n",
385 (int)bank_addr, (int)sensor_addr);
386 break;
387 }
388 outb(buf[i], data->addr + ABIT_UGURU_CMD);
389 }
390
391 /* Now we need to wait till the chip is ready to be read again,
Hans de Goedefaf9b612006-08-25 10:24:20 +0200392 so that we can read 0xAC as confirmation that our write has
393 succeeded. */
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200394 if (abituguru_wait(data, ABIT_UGURU_STATUS_READ)) {
395 ABIT_UGURU_DEBUG(1, "timeout exceeded waiting for read state "
396 "after write (bank: %d, sensor: %d)\n", (int)bank_addr,
397 (int)sensor_addr);
398 return -EIO;
399 }
400
401 /* Cmd port MUST be read now and should contain 0xAC */
Hans de Goedefaf9b612006-08-25 10:24:20 +0200402 while (inb_p(data->addr + ABIT_UGURU_CMD) != 0xAC) {
403 timeout--;
404 if (timeout == 0) {
405 ABIT_UGURU_DEBUG(1, "CMD reg does not hold 0xAC after "
406 "write (bank: %d, sensor: %d)\n",
407 (int)bank_addr, (int)sensor_addr);
408 return -EIO;
409 }
410 msleep(0);
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200411 }
412
413 /* Last put the chip back in ready state */
414 abituguru_ready(data);
415
416 return i;
417}
418
419/* Detect sensor type. Temp and Volt sensors are enabled with
420 different masks and will ignore enable masks not meant for them.
421 This enables us to test what kind of sensor we're dealing with.
422 By setting the alarm thresholds so that we will always get an
423 alarm for sensor type X and then enabling the sensor as sensor type
424 X, if we then get an alarm it is a sensor of type X. */
425static int __devinit
426abituguru_detect_bank1_sensor_type(struct abituguru_data *data,
427 u8 sensor_addr)
428{
Hans de Goedee432dc82007-06-18 22:59:34 +0200429 u8 val, test_flag, buf[3];
Hans de Goedefaf9b612006-08-25 10:24:20 +0200430 int i, ret = -ENODEV; /* error is the most common used retval :| */
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200431
Hans de Goede9b2ad122006-07-05 18:07:49 +0200432 /* If overriden by the user return the user selected type */
433 if (bank1_types[sensor_addr] >= ABIT_UGURU_IN_SENSOR &&
434 bank1_types[sensor_addr] <= ABIT_UGURU_NC) {
435 ABIT_UGURU_DEBUG(2, "assuming sensor type %d for bank1 sensor "
436 "%d because of \"bank1_types\" module param\n",
437 bank1_types[sensor_addr], (int)sensor_addr);
438 return bank1_types[sensor_addr];
439 }
440
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200441 /* First read the sensor and the current settings */
442 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1, sensor_addr, &val,
443 1, ABIT_UGURU_MAX_RETRIES) != 1)
Hans de Goedea2392e02006-06-04 20:23:01 +0200444 return -ENODEV;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200445
446 /* Test val is sane / usable for sensor type detection. */
Hans de Goedee432dc82007-06-18 22:59:34 +0200447 if ((val < 10u) || (val > 250u)) {
Joe Perches28ebfa12010-10-20 06:51:25 +0000448 pr_warn("bank1-sensor: %d reading (%d) too close to limits, "
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200449 "unable to determine sensor type, skipping sensor\n",
450 (int)sensor_addr, (int)val);
451 /* assume no sensor is there for sensors for which we can't
452 determine the sensor type because their reading is too close
453 to their limits, this usually means no sensor is there. */
454 return ABIT_UGURU_NC;
455 }
456
457 ABIT_UGURU_DEBUG(2, "testing bank1 sensor %d\n", (int)sensor_addr);
458 /* Volt sensor test, enable volt low alarm, set min value ridicously
Hans de Goedee432dc82007-06-18 22:59:34 +0200459 high, or vica versa if the reading is very high. If its a volt
460 sensor this should always give us an alarm. */
461 if (val <= 240u) {
462 buf[0] = ABIT_UGURU_VOLT_LOW_ALARM_ENABLE;
463 buf[1] = 245;
464 buf[2] = 250;
465 test_flag = ABIT_UGURU_VOLT_LOW_ALARM_FLAG;
466 } else {
467 buf[0] = ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE;
468 buf[1] = 5;
469 buf[2] = 10;
470 test_flag = ABIT_UGURU_VOLT_HIGH_ALARM_FLAG;
471 }
472
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200473 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, sensor_addr,
474 buf, 3) != 3)
Hans de Goedefaf9b612006-08-25 10:24:20 +0200475 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200476 /* Now we need 20 ms to give the uguru time to read the sensors
477 and raise a voltage alarm */
478 set_current_state(TASK_UNINTERRUPTIBLE);
479 schedule_timeout(HZ/50);
480 /* Check for alarm and check the alarm is a volt low alarm. */
481 if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, buf, 3,
482 ABIT_UGURU_MAX_RETRIES) != 3)
Hans de Goedefaf9b612006-08-25 10:24:20 +0200483 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200484 if (buf[sensor_addr/8] & (0x01 << (sensor_addr % 8))) {
485 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1,
486 sensor_addr, buf, 3,
487 ABIT_UGURU_MAX_RETRIES) != 3)
Hans de Goedefaf9b612006-08-25 10:24:20 +0200488 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedee432dc82007-06-18 22:59:34 +0200489 if (buf[0] & test_flag) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200490 ABIT_UGURU_DEBUG(2, " found volt sensor\n");
Hans de Goedefaf9b612006-08-25 10:24:20 +0200491 ret = ABIT_UGURU_IN_SENSOR;
492 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200493 } else
494 ABIT_UGURU_DEBUG(2, " alarm raised during volt "
Hans de Goedee432dc82007-06-18 22:59:34 +0200495 "sensor test, but volt range flag not set\n");
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200496 } else
497 ABIT_UGURU_DEBUG(2, " alarm not raised during volt sensor "
498 "test\n");
499
500 /* Temp sensor test, enable sensor as a temp sensor, set beep value
501 ridicously low (but not too low, otherwise uguru ignores it).
502 If its a temp sensor this should always give us an alarm. */
503 buf[0] = ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE;
504 buf[1] = 5;
505 buf[2] = 10;
506 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2, sensor_addr,
507 buf, 3) != 3)
Hans de Goedefaf9b612006-08-25 10:24:20 +0200508 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200509 /* Now we need 50 ms to give the uguru time to read the sensors
510 and raise a temp alarm */
511 set_current_state(TASK_UNINTERRUPTIBLE);
512 schedule_timeout(HZ/20);
513 /* Check for alarm and check the alarm is a temp high alarm. */
514 if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0, buf, 3,
515 ABIT_UGURU_MAX_RETRIES) != 3)
Hans de Goedefaf9b612006-08-25 10:24:20 +0200516 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200517 if (buf[sensor_addr/8] & (0x01 << (sensor_addr % 8))) {
518 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1 + 1,
519 sensor_addr, buf, 3,
520 ABIT_UGURU_MAX_RETRIES) != 3)
Hans de Goedefaf9b612006-08-25 10:24:20 +0200521 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200522 if (buf[0] & ABIT_UGURU_TEMP_HIGH_ALARM_FLAG) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200523 ABIT_UGURU_DEBUG(2, " found temp sensor\n");
Hans de Goedefaf9b612006-08-25 10:24:20 +0200524 ret = ABIT_UGURU_TEMP_SENSOR;
525 goto abituguru_detect_bank1_sensor_type_exit;
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200526 } else
527 ABIT_UGURU_DEBUG(2, " alarm raised during temp "
528 "sensor test, but temp high flag not set\n");
529 } else
530 ABIT_UGURU_DEBUG(2, " alarm not raised during temp sensor "
531 "test\n");
532
Hans de Goedefaf9b612006-08-25 10:24:20 +0200533 ret = ABIT_UGURU_NC;
534abituguru_detect_bank1_sensor_type_exit:
535 /* Restore original settings, failing here is really BAD, it has been
536 reported that some BIOS-es hang when entering the uGuru menu with
537 invalid settings present in the uGuru, so we try this 3 times. */
538 for (i = 0; i < 3; i++)
539 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2,
540 sensor_addr, data->bank1_settings[sensor_addr],
541 3) == 3)
542 break;
543 if (i == 3) {
Joe Perches28ebfa12010-10-20 06:51:25 +0000544 pr_err("Fatal error could not restore original settings. %s %s\n",
545 never_happen, report_this);
Hans de Goedea2392e02006-06-04 20:23:01 +0200546 return -ENODEV;
Hans de Goedefaf9b612006-08-25 10:24:20 +0200547 }
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200548 return ret;
549}
550
551/* These functions try to find out how many sensors there are in bank2 and how
552 many pwms there are. The purpose of this is to make sure that we don't give
553 the user the possibility to change settings for non-existent sensors / pwm.
554 The uGuru will happily read / write whatever memory happens to be after the
555 memory storing the PWM settings when reading/writing to a PWM which is not
556 there. Notice even if we detect a PWM which doesn't exist we normally won't
557 write to it, unless the user tries to change the settings.
558
559 Although the uGuru allows reading (settings) from non existing bank2
560 sensors, my version of the uGuru does seem to stop writing to them, the
561 write function above aborts in this case with:
562 "CMD reg does not hold 0xAC after write"
563
564 Notice these 2 tests are non destructive iow read-only tests, otherwise
565 they would defeat their purpose. Although for the bank2_sensors detection a
566 read/write test would be feasible because of the reaction above, I've
567 however opted to stay on the safe side. */
568static void __devinit
569abituguru_detect_no_bank2_sensors(struct abituguru_data *data)
570{
571 int i;
572
Hans de Goede9b2ad122006-07-05 18:07:49 +0200573 if (fan_sensors > 0 && fan_sensors <= ABIT_UGURU_MAX_BANK2_SENSORS) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200574 data->bank2_sensors = fan_sensors;
575 ABIT_UGURU_DEBUG(2, "assuming %d fan sensors because of "
576 "\"fan_sensors\" module param\n",
577 (int)data->bank2_sensors);
578 return;
579 }
580
581 ABIT_UGURU_DEBUG(2, "detecting number of fan sensors\n");
582 for (i = 0; i < ABIT_UGURU_MAX_BANK2_SENSORS; i++) {
583 /* 0x89 are the known used bits:
584 -0x80 enable shutdown
585 -0x08 enable beep
586 -0x01 enable alarm
587 All other bits should be 0, but on some motherboards
Hans de Goedeb7c06602006-06-04 20:24:11 +0200588 0x40 (bit 6) is also high for some of the fans?? */
589 if (data->bank2_settings[i][0] & ~0xC9) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200590 ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem "
591 "to be a fan sensor: settings[0] = %02X\n",
592 i, (unsigned int)data->bank2_settings[i][0]);
593 break;
594 }
595
596 /* check if the threshold is within the allowed range */
597 if (data->bank2_settings[i][1] <
598 abituguru_bank2_min_threshold) {
599 ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem "
600 "to be a fan sensor: the threshold (%d) is "
601 "below the minimum (%d)\n", i,
602 (int)data->bank2_settings[i][1],
603 (int)abituguru_bank2_min_threshold);
604 break;
605 }
606 if (data->bank2_settings[i][1] >
607 abituguru_bank2_max_threshold) {
608 ABIT_UGURU_DEBUG(2, " bank2 sensor %d does not seem "
609 "to be a fan sensor: the threshold (%d) is "
610 "above the maximum (%d)\n", i,
611 (int)data->bank2_settings[i][1],
612 (int)abituguru_bank2_max_threshold);
613 break;
614 }
615 }
616
617 data->bank2_sensors = i;
618 ABIT_UGURU_DEBUG(2, " found: %d fan sensors\n",
619 (int)data->bank2_sensors);
620}
621
622static void __devinit
623abituguru_detect_no_pwms(struct abituguru_data *data)
624{
625 int i, j;
626
Hans de Goede9b2ad122006-07-05 18:07:49 +0200627 if (pwms > 0 && pwms <= ABIT_UGURU_MAX_PWMS) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +0200628 data->pwms = pwms;
629 ABIT_UGURU_DEBUG(2, "assuming %d PWM outputs because of "
630 "\"pwms\" module param\n", (int)data->pwms);
631 return;
632 }
633
634 ABIT_UGURU_DEBUG(2, "detecting number of PWM outputs\n");
635 for (i = 0; i < ABIT_UGURU_MAX_PWMS; i++) {
636 /* 0x80 is the enable bit and the low
637 nibble is which temp sensor to use,
638 the other bits should be 0 */
639 if (data->pwm_settings[i][0] & ~0x8F) {
640 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "
641 "to be a pwm channel: settings[0] = %02X\n",
642 i, (unsigned int)data->pwm_settings[i][0]);
643 break;
644 }
645
646 /* the low nibble must correspond to one of the temp sensors
647 we've found */
648 for (j = 0; j < data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR];
649 j++) {
650 if (data->bank1_address[ABIT_UGURU_TEMP_SENSOR][j] ==
651 (data->pwm_settings[i][0] & 0x0F))
652 break;
653 }
654 if (j == data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]) {
655 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "
656 "to be a pwm channel: %d is not a valid temp "
657 "sensor address\n", i,
658 data->pwm_settings[i][0] & 0x0F);
659 break;
660 }
661
662 /* check if all other settings are within the allowed range */
663 for (j = 1; j < 5; j++) {
664 u8 min;
665 /* special case pwm1 min pwm% */
666 if ((i == 0) && ((j == 1) || (j == 2)))
667 min = 77;
668 else
669 min = abituguru_pwm_min[j];
670 if (data->pwm_settings[i][j] < min) {
671 ABIT_UGURU_DEBUG(2, " pwm channel %d does "
672 "not seem to be a pwm channel: "
673 "setting %d (%d) is below the minimum "
674 "value (%d)\n", i, j,
675 (int)data->pwm_settings[i][j],
676 (int)min);
677 goto abituguru_detect_no_pwms_exit;
678 }
679 if (data->pwm_settings[i][j] > abituguru_pwm_max[j]) {
680 ABIT_UGURU_DEBUG(2, " pwm channel %d does "
681 "not seem to be a pwm channel: "
682 "setting %d (%d) is above the maximum "
683 "value (%d)\n", i, j,
684 (int)data->pwm_settings[i][j],
685 (int)abituguru_pwm_max[j]);
686 goto abituguru_detect_no_pwms_exit;
687 }
688 }
689
690 /* check that min temp < max temp and min pwm < max pwm */
691 if (data->pwm_settings[i][1] >= data->pwm_settings[i][2]) {
692 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "
693 "to be a pwm channel: min pwm (%d) >= "
694 "max pwm (%d)\n", i,
695 (int)data->pwm_settings[i][1],
696 (int)data->pwm_settings[i][2]);
697 break;
698 }
699 if (data->pwm_settings[i][3] >= data->pwm_settings[i][4]) {
700 ABIT_UGURU_DEBUG(2, " pwm channel %d does not seem "
701 "to be a pwm channel: min temp (%d) >= "
702 "max temp (%d)\n", i,
703 (int)data->pwm_settings[i][3],
704 (int)data->pwm_settings[i][4]);
705 break;
706 }
707 }
708
709abituguru_detect_no_pwms_exit:
710 data->pwms = i;
711 ABIT_UGURU_DEBUG(2, " found: %d PWM outputs\n", (int)data->pwms);
712}
713
714/* Following are the sysfs callback functions. These functions expect:
715 sensor_device_attribute_2->index: sensor address/offset in the bank
716 sensor_device_attribute_2->nr: register offset, bitmask or NA. */
717static struct abituguru_data *abituguru_update_device(struct device *dev);
718
719static ssize_t show_bank1_value(struct device *dev,
720 struct device_attribute *devattr, char *buf)
721{
722 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
723 struct abituguru_data *data = abituguru_update_device(dev);
724 if (!data)
725 return -EIO;
726 return sprintf(buf, "%d\n", (data->bank1_value[attr->index] *
727 data->bank1_max_value[attr->index] + 128) / 255);
728}
729
730static ssize_t show_bank1_setting(struct device *dev,
731 struct device_attribute *devattr, char *buf)
732{
733 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
734 struct abituguru_data *data = dev_get_drvdata(dev);
735 return sprintf(buf, "%d\n",
736 (data->bank1_settings[attr->index][attr->nr] *
737 data->bank1_max_value[attr->index] + 128) / 255);
738}
739
740static ssize_t show_bank2_value(struct device *dev,
741 struct device_attribute *devattr, char *buf)
742{
743 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
744 struct abituguru_data *data = abituguru_update_device(dev);
745 if (!data)
746 return -EIO;
747 return sprintf(buf, "%d\n", (data->bank2_value[attr->index] *
748 ABIT_UGURU_FAN_MAX + 128) / 255);
749}
750
751static ssize_t show_bank2_setting(struct device *dev,
752 struct device_attribute *devattr, char *buf)
753{
754 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
755 struct abituguru_data *data = dev_get_drvdata(dev);
756 return sprintf(buf, "%d\n",
757 (data->bank2_settings[attr->index][attr->nr] *
758 ABIT_UGURU_FAN_MAX + 128) / 255);
759}
760
761static ssize_t store_bank1_setting(struct device *dev, struct device_attribute
762 *devattr, const char *buf, size_t count)
763{
764 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
765 struct abituguru_data *data = dev_get_drvdata(dev);
766 u8 val = (simple_strtoul(buf, NULL, 10) * 255 +
767 data->bank1_max_value[attr->index]/2) /
768 data->bank1_max_value[attr->index];
769 ssize_t ret = count;
770
771 mutex_lock(&data->update_lock);
772 if (data->bank1_settings[attr->index][attr->nr] != val) {
773 u8 orig_val = data->bank1_settings[attr->index][attr->nr];
774 data->bank1_settings[attr->index][attr->nr] = val;
775 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK1 + 2,
776 attr->index, data->bank1_settings[attr->index],
777 3) <= attr->nr) {
778 data->bank1_settings[attr->index][attr->nr] = orig_val;
779 ret = -EIO;
780 }
781 }
782 mutex_unlock(&data->update_lock);
783 return ret;
784}
785
786static ssize_t store_bank2_setting(struct device *dev, struct device_attribute
787 *devattr, const char *buf, size_t count)
788{
789 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
790 struct abituguru_data *data = dev_get_drvdata(dev);
791 u8 val = (simple_strtoul(buf, NULL, 10)*255 + ABIT_UGURU_FAN_MAX/2) /
792 ABIT_UGURU_FAN_MAX;
793 ssize_t ret = count;
794
795 /* this check can be done before taking the lock */
796 if ((val < abituguru_bank2_min_threshold) ||
797 (val > abituguru_bank2_max_threshold))
798 return -EINVAL;
799
800 mutex_lock(&data->update_lock);
801 if (data->bank2_settings[attr->index][attr->nr] != val) {
802 u8 orig_val = data->bank2_settings[attr->index][attr->nr];
803 data->bank2_settings[attr->index][attr->nr] = val;
804 if (abituguru_write(data, ABIT_UGURU_SENSOR_BANK2 + 2,
805 attr->index, data->bank2_settings[attr->index],
806 2) <= attr->nr) {
807 data->bank2_settings[attr->index][attr->nr] = orig_val;
808 ret = -EIO;
809 }
810 }
811 mutex_unlock(&data->update_lock);
812 return ret;
813}
814
815static ssize_t show_bank1_alarm(struct device *dev,
816 struct device_attribute *devattr, char *buf)
817{
818 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
819 struct abituguru_data *data = abituguru_update_device(dev);
820 if (!data)
821 return -EIO;
822 /* See if the alarm bit for this sensor is set, and if the
823 alarm matches the type of alarm we're looking for (for volt
824 it can be either low or high). The type is stored in a few
825 readonly bits in the settings part of the relevant sensor.
826 The bitmask of the type is passed to us in attr->nr. */
827 if ((data->alarms[attr->index / 8] & (0x01 << (attr->index % 8))) &&
828 (data->bank1_settings[attr->index][0] & attr->nr))
829 return sprintf(buf, "1\n");
830 else
831 return sprintf(buf, "0\n");
832}
833
834static ssize_t show_bank2_alarm(struct device *dev,
835 struct device_attribute *devattr, char *buf)
836{
837 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
838 struct abituguru_data *data = abituguru_update_device(dev);
839 if (!data)
840 return -EIO;
841 if (data->alarms[2] & (0x01 << attr->index))
842 return sprintf(buf, "1\n");
843 else
844 return sprintf(buf, "0\n");
845}
846
847static ssize_t show_bank1_mask(struct device *dev,
848 struct device_attribute *devattr, char *buf)
849{
850 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
851 struct abituguru_data *data = dev_get_drvdata(dev);
852 if (data->bank1_settings[attr->index][0] & attr->nr)
853 return sprintf(buf, "1\n");
854 else
855 return sprintf(buf, "0\n");
856}
857
858static ssize_t show_bank2_mask(struct device *dev,
859 struct device_attribute *devattr, char *buf)
860{
861 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
862 struct abituguru_data *data = dev_get_drvdata(dev);
863 if (data->bank2_settings[attr->index][0] & attr->nr)
864 return sprintf(buf, "1\n");
865 else
866 return sprintf(buf, "0\n");
867}
868
869static ssize_t store_bank1_mask(struct device *dev,
870 struct device_attribute *devattr, const char *buf, size_t count)
871{
872 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
873 struct abituguru_data *data = dev_get_drvdata(dev);
874 int mask = simple_strtoul(buf, NULL, 10);
875 ssize_t ret = count;
876 u8 orig_val;
877
878 mutex_lock(&data->update_lock);
879 orig_val = data->bank1_settings[attr->index][0];
880
881 if (mask)
882 data->bank1_settings[attr->index][0] |= attr->nr;
883 else
884 data->bank1_settings[attr->index][0] &= ~attr->nr;
885
886 if ((data->bank1_settings[attr->index][0] != orig_val) &&
887 (abituguru_write(data,
888 ABIT_UGURU_SENSOR_BANK1 + 2, attr->index,
889 data->bank1_settings[attr->index], 3) < 1)) {
890 data->bank1_settings[attr->index][0] = orig_val;
891 ret = -EIO;
892 }
893 mutex_unlock(&data->update_lock);
894 return ret;
895}
896
897static ssize_t store_bank2_mask(struct device *dev,
898 struct device_attribute *devattr, const char *buf, size_t count)
899{
900 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
901 struct abituguru_data *data = dev_get_drvdata(dev);
902 int mask = simple_strtoul(buf, NULL, 10);
903 ssize_t ret = count;
904 u8 orig_val;
905
906 mutex_lock(&data->update_lock);
907 orig_val = data->bank2_settings[attr->index][0];
908
909 if (mask)
910 data->bank2_settings[attr->index][0] |= attr->nr;
911 else
912 data->bank2_settings[attr->index][0] &= ~attr->nr;
913
914 if ((data->bank2_settings[attr->index][0] != orig_val) &&
915 (abituguru_write(data,
916 ABIT_UGURU_SENSOR_BANK2 + 2, attr->index,
917 data->bank2_settings[attr->index], 2) < 1)) {
918 data->bank2_settings[attr->index][0] = orig_val;
919 ret = -EIO;
920 }
921 mutex_unlock(&data->update_lock);
922 return ret;
923}
924
925/* Fan PWM (speed control) */
926static ssize_t show_pwm_setting(struct device *dev,
927 struct device_attribute *devattr, char *buf)
928{
929 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
930 struct abituguru_data *data = dev_get_drvdata(dev);
931 return sprintf(buf, "%d\n", data->pwm_settings[attr->index][attr->nr] *
932 abituguru_pwm_settings_multiplier[attr->nr]);
933}
934
935static ssize_t store_pwm_setting(struct device *dev, struct device_attribute
936 *devattr, const char *buf, size_t count)
937{
938 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
939 struct abituguru_data *data = dev_get_drvdata(dev);
940 u8 min, val = (simple_strtoul(buf, NULL, 10) +
941 abituguru_pwm_settings_multiplier[attr->nr]/2) /
942 abituguru_pwm_settings_multiplier[attr->nr];
943 ssize_t ret = count;
944
945 /* special case pwm1 min pwm% */
946 if ((attr->index == 0) && ((attr->nr == 1) || (attr->nr == 2)))
947 min = 77;
948 else
949 min = abituguru_pwm_min[attr->nr];
950
951 /* this check can be done before taking the lock */
952 if ((val < min) || (val > abituguru_pwm_max[attr->nr]))
953 return -EINVAL;
954
955 mutex_lock(&data->update_lock);
956 /* this check needs to be done after taking the lock */
957 if ((attr->nr & 1) &&
958 (val >= data->pwm_settings[attr->index][attr->nr + 1]))
959 ret = -EINVAL;
960 else if (!(attr->nr & 1) &&
961 (val <= data->pwm_settings[attr->index][attr->nr - 1]))
962 ret = -EINVAL;
963 else if (data->pwm_settings[attr->index][attr->nr] != val) {
964 u8 orig_val = data->pwm_settings[attr->index][attr->nr];
965 data->pwm_settings[attr->index][attr->nr] = val;
966 if (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1,
967 attr->index, data->pwm_settings[attr->index],
968 5) <= attr->nr) {
969 data->pwm_settings[attr->index][attr->nr] =
970 orig_val;
971 ret = -EIO;
972 }
973 }
974 mutex_unlock(&data->update_lock);
975 return ret;
976}
977
978static ssize_t show_pwm_sensor(struct device *dev,
979 struct device_attribute *devattr, char *buf)
980{
981 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
982 struct abituguru_data *data = dev_get_drvdata(dev);
983 int i;
984 /* We need to walk to the temp sensor addresses to find what
985 the userspace id of the configured temp sensor is. */
986 for (i = 0; i < data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]; i++)
987 if (data->bank1_address[ABIT_UGURU_TEMP_SENSOR][i] ==
988 (data->pwm_settings[attr->index][0] & 0x0F))
989 return sprintf(buf, "%d\n", i+1);
990
991 return -ENXIO;
992}
993
994static ssize_t store_pwm_sensor(struct device *dev, struct device_attribute
995 *devattr, const char *buf, size_t count)
996{
997 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
998 struct abituguru_data *data = dev_get_drvdata(dev);
999 unsigned long val = simple_strtoul(buf, NULL, 10) - 1;
1000 ssize_t ret = count;
1001
1002 mutex_lock(&data->update_lock);
1003 if (val < data->bank1_sensors[ABIT_UGURU_TEMP_SENSOR]) {
1004 u8 orig_val = data->pwm_settings[attr->index][0];
1005 u8 address = data->bank1_address[ABIT_UGURU_TEMP_SENSOR][val];
1006 data->pwm_settings[attr->index][0] &= 0xF0;
1007 data->pwm_settings[attr->index][0] |= address;
1008 if (data->pwm_settings[attr->index][0] != orig_val) {
1009 if (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1,
1010 attr->index,
1011 data->pwm_settings[attr->index],
1012 5) < 1) {
1013 data->pwm_settings[attr->index][0] = orig_val;
1014 ret = -EIO;
1015 }
1016 }
1017 }
1018 else
1019 ret = -EINVAL;
1020 mutex_unlock(&data->update_lock);
1021 return ret;
1022}
1023
1024static ssize_t show_pwm_enable(struct device *dev,
1025 struct device_attribute *devattr, char *buf)
1026{
1027 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
1028 struct abituguru_data *data = dev_get_drvdata(dev);
1029 int res = 0;
1030 if (data->pwm_settings[attr->index][0] & ABIT_UGURU_FAN_PWM_ENABLE)
1031 res = 2;
1032 return sprintf(buf, "%d\n", res);
1033}
1034
1035static ssize_t store_pwm_enable(struct device *dev, struct device_attribute
1036 *devattr, const char *buf, size_t count)
1037{
1038 struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
1039 struct abituguru_data *data = dev_get_drvdata(dev);
1040 u8 orig_val, user_val = simple_strtoul(buf, NULL, 10);
1041 ssize_t ret = count;
1042
1043 mutex_lock(&data->update_lock);
1044 orig_val = data->pwm_settings[attr->index][0];
1045 switch (user_val) {
1046 case 0:
1047 data->pwm_settings[attr->index][0] &=
1048 ~ABIT_UGURU_FAN_PWM_ENABLE;
1049 break;
1050 case 2:
1051 data->pwm_settings[attr->index][0] |=
1052 ABIT_UGURU_FAN_PWM_ENABLE;
1053 break;
1054 default:
1055 ret = -EINVAL;
1056 }
1057 if ((data->pwm_settings[attr->index][0] != orig_val) &&
1058 (abituguru_write(data, ABIT_UGURU_FAN_PWM + 1,
1059 attr->index, data->pwm_settings[attr->index],
1060 5) < 1)) {
1061 data->pwm_settings[attr->index][0] = orig_val;
1062 ret = -EIO;
1063 }
1064 mutex_unlock(&data->update_lock);
1065 return ret;
1066}
1067
1068static ssize_t show_name(struct device *dev,
1069 struct device_attribute *devattr, char *buf)
1070{
1071 return sprintf(buf, "%s\n", ABIT_UGURU_NAME);
1072}
1073
1074/* Sysfs attr templates, the real entries are generated automatically. */
1075static const
1076struct sensor_device_attribute_2 abituguru_sysfs_bank1_templ[2][9] = {
1077 {
1078 SENSOR_ATTR_2(in%d_input, 0444, show_bank1_value, NULL, 0, 0),
1079 SENSOR_ATTR_2(in%d_min, 0644, show_bank1_setting,
1080 store_bank1_setting, 1, 0),
1081 SENSOR_ATTR_2(in%d_min_alarm, 0444, show_bank1_alarm, NULL,
1082 ABIT_UGURU_VOLT_LOW_ALARM_FLAG, 0),
1083 SENSOR_ATTR_2(in%d_max, 0644, show_bank1_setting,
1084 store_bank1_setting, 2, 0),
1085 SENSOR_ATTR_2(in%d_max_alarm, 0444, show_bank1_alarm, NULL,
1086 ABIT_UGURU_VOLT_HIGH_ALARM_FLAG, 0),
1087 SENSOR_ATTR_2(in%d_beep, 0644, show_bank1_mask,
1088 store_bank1_mask, ABIT_UGURU_BEEP_ENABLE, 0),
1089 SENSOR_ATTR_2(in%d_shutdown, 0644, show_bank1_mask,
1090 store_bank1_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0),
1091 SENSOR_ATTR_2(in%d_min_alarm_enable, 0644, show_bank1_mask,
1092 store_bank1_mask, ABIT_UGURU_VOLT_LOW_ALARM_ENABLE, 0),
1093 SENSOR_ATTR_2(in%d_max_alarm_enable, 0644, show_bank1_mask,
1094 store_bank1_mask, ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE, 0),
1095 }, {
1096 SENSOR_ATTR_2(temp%d_input, 0444, show_bank1_value, NULL, 0, 0),
1097 SENSOR_ATTR_2(temp%d_alarm, 0444, show_bank1_alarm, NULL,
1098 ABIT_UGURU_TEMP_HIGH_ALARM_FLAG, 0),
1099 SENSOR_ATTR_2(temp%d_max, 0644, show_bank1_setting,
1100 store_bank1_setting, 1, 0),
1101 SENSOR_ATTR_2(temp%d_crit, 0644, show_bank1_setting,
1102 store_bank1_setting, 2, 0),
1103 SENSOR_ATTR_2(temp%d_beep, 0644, show_bank1_mask,
1104 store_bank1_mask, ABIT_UGURU_BEEP_ENABLE, 0),
1105 SENSOR_ATTR_2(temp%d_shutdown, 0644, show_bank1_mask,
1106 store_bank1_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0),
1107 SENSOR_ATTR_2(temp%d_alarm_enable, 0644, show_bank1_mask,
1108 store_bank1_mask, ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE, 0),
1109 }
1110};
1111
1112static const struct sensor_device_attribute_2 abituguru_sysfs_fan_templ[6] = {
1113 SENSOR_ATTR_2(fan%d_input, 0444, show_bank2_value, NULL, 0, 0),
1114 SENSOR_ATTR_2(fan%d_alarm, 0444, show_bank2_alarm, NULL, 0, 0),
1115 SENSOR_ATTR_2(fan%d_min, 0644, show_bank2_setting,
1116 store_bank2_setting, 1, 0),
1117 SENSOR_ATTR_2(fan%d_beep, 0644, show_bank2_mask,
1118 store_bank2_mask, ABIT_UGURU_BEEP_ENABLE, 0),
1119 SENSOR_ATTR_2(fan%d_shutdown, 0644, show_bank2_mask,
1120 store_bank2_mask, ABIT_UGURU_SHUTDOWN_ENABLE, 0),
1121 SENSOR_ATTR_2(fan%d_alarm_enable, 0644, show_bank2_mask,
1122 store_bank2_mask, ABIT_UGURU_FAN_LOW_ALARM_ENABLE, 0),
1123};
1124
1125static const struct sensor_device_attribute_2 abituguru_sysfs_pwm_templ[6] = {
1126 SENSOR_ATTR_2(pwm%d_enable, 0644, show_pwm_enable,
1127 store_pwm_enable, 0, 0),
1128 SENSOR_ATTR_2(pwm%d_auto_channels_temp, 0644, show_pwm_sensor,
1129 store_pwm_sensor, 0, 0),
1130 SENSOR_ATTR_2(pwm%d_auto_point1_pwm, 0644, show_pwm_setting,
1131 store_pwm_setting, 1, 0),
1132 SENSOR_ATTR_2(pwm%d_auto_point2_pwm, 0644, show_pwm_setting,
1133 store_pwm_setting, 2, 0),
1134 SENSOR_ATTR_2(pwm%d_auto_point1_temp, 0644, show_pwm_setting,
1135 store_pwm_setting, 3, 0),
1136 SENSOR_ATTR_2(pwm%d_auto_point2_temp, 0644, show_pwm_setting,
1137 store_pwm_setting, 4, 0),
1138};
1139
Hans de Goedea2392e02006-06-04 20:23:01 +02001140static struct sensor_device_attribute_2 abituguru_sysfs_attr[] = {
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001141 SENSOR_ATTR_2(name, 0444, show_name, NULL, 0, 0),
1142};
1143
1144static int __devinit abituguru_probe(struct platform_device *pdev)
1145{
1146 struct abituguru_data *data;
Hans de Goedea2392e02006-06-04 20:23:01 +02001147 int i, j, used, sysfs_names_free, sysfs_attr_i, res = -ENODEV;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001148 char *sysfs_filename;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001149
1150 /* El weirdo probe order, to keep the sysfs order identical to the
1151 BIOS and window-appliction listing order. */
Hans de Goedea2392e02006-06-04 20:23:01 +02001152 const u8 probe_order[ABIT_UGURU_MAX_BANK1_SENSORS] = {
1153 0x00, 0x01, 0x03, 0x04, 0x0A, 0x08, 0x0E, 0x02,
1154 0x09, 0x06, 0x05, 0x0B, 0x0F, 0x0D, 0x07, 0x0C };
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001155
1156 if (!(data = kzalloc(sizeof(struct abituguru_data), GFP_KERNEL)))
1157 return -ENOMEM;
1158
1159 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
1160 mutex_init(&data->update_lock);
1161 platform_set_drvdata(pdev, data);
1162
1163 /* See if the uGuru is ready */
1164 if (inb_p(data->addr + ABIT_UGURU_DATA) == ABIT_UGURU_STATUS_INPUT)
1165 data->uguru_ready = 1;
1166
1167 /* Completely read the uGuru this has 2 purposes:
1168 - testread / see if one really is there.
1169 - make an in memory copy of all the uguru settings for future use. */
1170 if (abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0,
Hans de Goedea2392e02006-06-04 20:23:01 +02001171 data->alarms, 3, ABIT_UGURU_MAX_RETRIES) != 3)
1172 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001173
Hans de Goedea2392e02006-06-04 20:23:01 +02001174 for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001175 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1, i,
1176 &data->bank1_value[i], 1,
Hans de Goedea2392e02006-06-04 20:23:01 +02001177 ABIT_UGURU_MAX_RETRIES) != 1)
1178 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001179 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK1+1, i,
1180 data->bank1_settings[i], 3,
Hans de Goedea2392e02006-06-04 20:23:01 +02001181 ABIT_UGURU_MAX_RETRIES) != 3)
1182 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001183 }
1184 /* Note: We don't know how many bank2 sensors / pwms there really are,
1185 but in order to "detect" this we need to read the maximum amount
1186 anyways. If we read sensors/pwms not there we'll just read crap
1187 this can't hurt. We need the detection because we don't want
1188 unwanted writes, which will hurt! */
1189 for (i = 0; i < ABIT_UGURU_MAX_BANK2_SENSORS; i++) {
1190 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK2, i,
1191 &data->bank2_value[i], 1,
Hans de Goedea2392e02006-06-04 20:23:01 +02001192 ABIT_UGURU_MAX_RETRIES) != 1)
1193 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001194 if (abituguru_read(data, ABIT_UGURU_SENSOR_BANK2+1, i,
1195 data->bank2_settings[i], 2,
Hans de Goedea2392e02006-06-04 20:23:01 +02001196 ABIT_UGURU_MAX_RETRIES) != 2)
1197 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001198 }
1199 for (i = 0; i < ABIT_UGURU_MAX_PWMS; i++) {
1200 if (abituguru_read(data, ABIT_UGURU_FAN_PWM, i,
1201 data->pwm_settings[i], 5,
Hans de Goedea2392e02006-06-04 20:23:01 +02001202 ABIT_UGURU_MAX_RETRIES) != 5)
1203 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001204 }
1205 data->last_updated = jiffies;
1206
1207 /* Detect sensor types and fill the sysfs attr for bank1 */
Hans de Goedea2392e02006-06-04 20:23:01 +02001208 sysfs_attr_i = 0;
1209 sysfs_filename = data->sysfs_names;
1210 sysfs_names_free = ABITUGURU_SYSFS_NAMES_LENGTH;
1211 for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001212 res = abituguru_detect_bank1_sensor_type(data, probe_order[i]);
Hans de Goedea2392e02006-06-04 20:23:01 +02001213 if (res < 0)
1214 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001215 if (res == ABIT_UGURU_NC)
1216 continue;
1217
Hans de Goedea2392e02006-06-04 20:23:01 +02001218 /* res 1 (temp) sensors have 7 sysfs entries, 0 (in) 9 */
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001219 for (j = 0; j < (res ? 7 : 9); j++) {
Hans de Goedea2392e02006-06-04 20:23:01 +02001220 used = snprintf(sysfs_filename, sysfs_names_free,
1221 abituguru_sysfs_bank1_templ[res][j].dev_attr.
1222 attr.name, data->bank1_sensors[res] + res)
1223 + 1;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001224 data->sysfs_attr[sysfs_attr_i] =
1225 abituguru_sysfs_bank1_templ[res][j];
1226 data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name =
1227 sysfs_filename;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001228 data->sysfs_attr[sysfs_attr_i].index = probe_order[i];
Hans de Goedea2392e02006-06-04 20:23:01 +02001229 sysfs_filename += used;
1230 sysfs_names_free -= used;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001231 sysfs_attr_i++;
1232 }
1233 data->bank1_max_value[probe_order[i]] =
1234 abituguru_bank1_max_value[res];
1235 data->bank1_address[res][data->bank1_sensors[res]] =
1236 probe_order[i];
1237 data->bank1_sensors[res]++;
1238 }
1239 /* Detect number of sensors and fill the sysfs attr for bank2 (fans) */
1240 abituguru_detect_no_bank2_sensors(data);
1241 for (i = 0; i < data->bank2_sensors; i++) {
Hans de Goedea2392e02006-06-04 20:23:01 +02001242 for (j = 0; j < ARRAY_SIZE(abituguru_sysfs_fan_templ); j++) {
1243 used = snprintf(sysfs_filename, sysfs_names_free,
1244 abituguru_sysfs_fan_templ[j].dev_attr.attr.name,
1245 i + 1) + 1;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001246 data->sysfs_attr[sysfs_attr_i] =
1247 abituguru_sysfs_fan_templ[j];
1248 data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name =
1249 sysfs_filename;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001250 data->sysfs_attr[sysfs_attr_i].index = i;
Hans de Goedea2392e02006-06-04 20:23:01 +02001251 sysfs_filename += used;
1252 sysfs_names_free -= used;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001253 sysfs_attr_i++;
1254 }
1255 }
1256 /* Detect number of sensors and fill the sysfs attr for pwms */
1257 abituguru_detect_no_pwms(data);
1258 for (i = 0; i < data->pwms; i++) {
Hans de Goedea2392e02006-06-04 20:23:01 +02001259 for (j = 0; j < ARRAY_SIZE(abituguru_sysfs_pwm_templ); j++) {
1260 used = snprintf(sysfs_filename, sysfs_names_free,
1261 abituguru_sysfs_pwm_templ[j].dev_attr.attr.name,
1262 i + 1) + 1;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001263 data->sysfs_attr[sysfs_attr_i] =
1264 abituguru_sysfs_pwm_templ[j];
1265 data->sysfs_attr[sysfs_attr_i].dev_attr.attr.name =
1266 sysfs_filename;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001267 data->sysfs_attr[sysfs_attr_i].index = i;
Hans de Goedea2392e02006-06-04 20:23:01 +02001268 sysfs_filename += used;
1269 sysfs_names_free -= used;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001270 sysfs_attr_i++;
1271 }
1272 }
Hans de Goedea2392e02006-06-04 20:23:01 +02001273 /* Fail safe check, this should never happen! */
1274 if (sysfs_names_free < 0) {
Joe Perches28ebfa12010-10-20 06:51:25 +00001275 pr_err("Fatal error ran out of space for sysfs attr names. %s %s",
1276 never_happen, report_this);
Hans de Goedea2392e02006-06-04 20:23:01 +02001277 res = -ENAMETOOLONG;
1278 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001279 }
Joe Perches28ebfa12010-10-20 06:51:25 +00001280 pr_info("found Abit uGuru\n");
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001281
1282 /* Register sysfs hooks */
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001283 for (i = 0; i < sysfs_attr_i; i++)
Hans de Goedebc8f0a22007-02-14 21:15:05 +01001284 if (device_create_file(&pdev->dev,
1285 &data->sysfs_attr[i].dev_attr))
1286 goto abituguru_probe_error;
Hans de Goedea2392e02006-06-04 20:23:01 +02001287 for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++)
Hans de Goedebc8f0a22007-02-14 21:15:05 +01001288 if (device_create_file(&pdev->dev,
1289 &abituguru_sysfs_attr[i].dev_attr))
1290 goto abituguru_probe_error;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001291
Tony Jones1beeffe2007-08-20 13:46:20 -07001292 data->hwmon_dev = hwmon_device_register(&pdev->dev);
1293 if (!IS_ERR(data->hwmon_dev))
Hans de Goedebc8f0a22007-02-14 21:15:05 +01001294 return 0; /* success */
Hans de Goedea2392e02006-06-04 20:23:01 +02001295
Tony Jones1beeffe2007-08-20 13:46:20 -07001296 res = PTR_ERR(data->hwmon_dev);
Hans de Goedea2392e02006-06-04 20:23:01 +02001297abituguru_probe_error:
Hans de Goedebc8f0a22007-02-14 21:15:05 +01001298 for (i = 0; data->sysfs_attr[i].dev_attr.attr.name; i++)
1299 device_remove_file(&pdev->dev, &data->sysfs_attr[i].dev_attr);
1300 for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++)
1301 device_remove_file(&pdev->dev,
1302 &abituguru_sysfs_attr[i].dev_attr);
Jean Delvare04a62172007-06-12 13:57:19 +02001303 platform_set_drvdata(pdev, NULL);
Hans de Goedea2392e02006-06-04 20:23:01 +02001304 kfree(data);
1305 return res;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001306}
1307
1308static int __devexit abituguru_remove(struct platform_device *pdev)
1309{
Hans de Goedebc8f0a22007-02-14 21:15:05 +01001310 int i;
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001311 struct abituguru_data *data = platform_get_drvdata(pdev);
1312
Tony Jones1beeffe2007-08-20 13:46:20 -07001313 hwmon_device_unregister(data->hwmon_dev);
Hans de Goedebc8f0a22007-02-14 21:15:05 +01001314 for (i = 0; data->sysfs_attr[i].dev_attr.attr.name; i++)
1315 device_remove_file(&pdev->dev, &data->sysfs_attr[i].dev_attr);
1316 for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++)
1317 device_remove_file(&pdev->dev,
1318 &abituguru_sysfs_attr[i].dev_attr);
Jean Delvare04a62172007-06-12 13:57:19 +02001319 platform_set_drvdata(pdev, NULL);
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001320 kfree(data);
1321
1322 return 0;
1323}
1324
1325static struct abituguru_data *abituguru_update_device(struct device *dev)
1326{
1327 int i, err;
1328 struct abituguru_data *data = dev_get_drvdata(dev);
1329 /* fake a complete successful read if no update necessary. */
1330 char success = 1;
1331
1332 mutex_lock(&data->update_lock);
1333 if (time_after(jiffies, data->last_updated + HZ)) {
1334 success = 0;
1335 if ((err = abituguru_read(data, ABIT_UGURU_ALARM_BANK, 0,
1336 data->alarms, 3, 0)) != 3)
1337 goto LEAVE_UPDATE;
Hans de Goedea2392e02006-06-04 20:23:01 +02001338 for (i = 0; i < ABIT_UGURU_MAX_BANK1_SENSORS; i++) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001339 if ((err = abituguru_read(data,
1340 ABIT_UGURU_SENSOR_BANK1, i,
1341 &data->bank1_value[i], 1, 0)) != 1)
1342 goto LEAVE_UPDATE;
1343 if ((err = abituguru_read(data,
1344 ABIT_UGURU_SENSOR_BANK1 + 1, i,
1345 data->bank1_settings[i], 3, 0)) != 3)
1346 goto LEAVE_UPDATE;
1347 }
1348 for (i = 0; i < data->bank2_sensors; i++)
1349 if ((err = abituguru_read(data,
1350 ABIT_UGURU_SENSOR_BANK2, i,
1351 &data->bank2_value[i], 1, 0)) != 1)
1352 goto LEAVE_UPDATE;
1353 /* success! */
1354 success = 1;
1355 data->update_timeouts = 0;
1356LEAVE_UPDATE:
1357 /* handle timeout condition */
Hans de Goedefaf9b612006-08-25 10:24:20 +02001358 if (!success && (err == -EBUSY || err >= 0)) {
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001359 /* No overflow please */
1360 if (data->update_timeouts < 255u)
1361 data->update_timeouts++;
1362 if (data->update_timeouts <= ABIT_UGURU_MAX_TIMEOUTS) {
1363 ABIT_UGURU_DEBUG(3, "timeout exceeded, will "
1364 "try again next update\n");
1365 /* Just a timeout, fake a successful read */
1366 success = 1;
1367 } else
1368 ABIT_UGURU_DEBUG(1, "timeout exceeded %d "
1369 "times waiting for more input state\n",
1370 (int)data->update_timeouts);
1371 }
1372 /* On success set last_updated */
1373 if (success)
1374 data->last_updated = jiffies;
1375 }
1376 mutex_unlock(&data->update_lock);
1377
1378 if (success)
1379 return data;
1380 else
1381 return NULL;
1382}
1383
Hans de Goede360b9ab2006-08-28 14:42:24 +02001384#ifdef CONFIG_PM
1385static int abituguru_suspend(struct platform_device *pdev, pm_message_t state)
1386{
1387 struct abituguru_data *data = platform_get_drvdata(pdev);
1388 /* make sure all communications with the uguru are done and no new
1389 ones are started */
1390 mutex_lock(&data->update_lock);
1391 return 0;
1392}
1393
1394static int abituguru_resume(struct platform_device *pdev)
1395{
1396 struct abituguru_data *data = platform_get_drvdata(pdev);
1397 /* See if the uGuru is still ready */
1398 if (inb_p(data->addr + ABIT_UGURU_DATA) != ABIT_UGURU_STATUS_INPUT)
1399 data->uguru_ready = 0;
1400 mutex_unlock(&data->update_lock);
1401 return 0;
1402}
1403#else
1404#define abituguru_suspend NULL
1405#define abituguru_resume NULL
1406#endif /* CONFIG_PM */
1407
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001408static struct platform_driver abituguru_driver = {
1409 .driver = {
1410 .owner = THIS_MODULE,
1411 .name = ABIT_UGURU_NAME,
1412 },
Hans de Goede360b9ab2006-08-28 14:42:24 +02001413 .probe = abituguru_probe,
1414 .remove = __devexit_p(abituguru_remove),
1415 .suspend = abituguru_suspend,
1416 .resume = abituguru_resume,
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001417};
1418
1419static int __init abituguru_detect(void)
1420{
1421 /* See if there is an uguru there. After a reboot uGuru will hold 0x00
1422 at DATA and 0xAC, when this driver has already been loaded once
1423 DATA will hold 0x08. For most uGuru's CMD will hold 0xAC in either
1424 scenario but some will hold 0x00.
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001425 Some uGuru's initially hold 0x09 at DATA and will only hold 0x08
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001426 after reading CMD first, so CMD must be read first! */
1427 u8 cmd_val = inb_p(ABIT_UGURU_BASE + ABIT_UGURU_CMD);
1428 u8 data_val = inb_p(ABIT_UGURU_BASE + ABIT_UGURU_DATA);
1429 if (((data_val == 0x00) || (data_val == 0x08)) &&
1430 ((cmd_val == 0x00) || (cmd_val == 0xAC)))
1431 return ABIT_UGURU_BASE;
1432
1433 ABIT_UGURU_DEBUG(2, "no Abit uGuru found, data = 0x%02X, cmd = "
1434 "0x%02X\n", (unsigned int)data_val, (unsigned int)cmd_val);
1435
1436 if (force) {
Joe Perches28ebfa12010-10-20 06:51:25 +00001437 pr_info("Assuming Abit uGuru is present because of \"force\" parameter\n");
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001438 return ABIT_UGURU_BASE;
1439 }
1440
1441 /* No uGuru found */
1442 return -ENODEV;
1443}
1444
1445static struct platform_device *abituguru_pdev;
1446
1447static int __init abituguru_init(void)
1448{
1449 int address, err;
1450 struct resource res = { .flags = IORESOURCE_IO };
1451
Hans de Goedec182f5b2007-07-10 17:09:57 +02001452#ifdef CONFIG_DMI
Jeff Garzik18552562007-10-03 15:15:40 -04001453 const char *board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
Hans de Goedec182f5b2007-07-10 17:09:57 +02001454
1455 /* safety check, refuse to load on non Abit motherboards */
1456 if (!force && (!board_vendor ||
1457 strcmp(board_vendor, "http://www.abit.com.tw/")))
1458 return -ENODEV;
1459#endif
1460
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001461 address = abituguru_detect();
1462 if (address < 0)
1463 return address;
1464
1465 err = platform_driver_register(&abituguru_driver);
1466 if (err)
1467 goto exit;
1468
1469 abituguru_pdev = platform_device_alloc(ABIT_UGURU_NAME, address);
1470 if (!abituguru_pdev) {
Joe Perches28ebfa12010-10-20 06:51:25 +00001471 pr_err("Device allocation failed\n");
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001472 err = -ENOMEM;
1473 goto exit_driver_unregister;
1474 }
1475
1476 res.start = address;
1477 res.end = address + ABIT_UGURU_REGION_LENGTH - 1;
1478 res.name = ABIT_UGURU_NAME;
1479
1480 err = platform_device_add_resources(abituguru_pdev, &res, 1);
1481 if (err) {
Joe Perches28ebfa12010-10-20 06:51:25 +00001482 pr_err("Device resource addition failed (%d)\n", err);
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001483 goto exit_device_put;
1484 }
1485
1486 err = platform_device_add(abituguru_pdev);
1487 if (err) {
Joe Perches28ebfa12010-10-20 06:51:25 +00001488 pr_err("Device addition failed (%d)\n", err);
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001489 goto exit_device_put;
1490 }
1491
1492 return 0;
1493
1494exit_device_put:
1495 platform_device_put(abituguru_pdev);
1496exit_driver_unregister:
1497 platform_driver_unregister(&abituguru_driver);
1498exit:
1499 return err;
1500}
1501
1502static void __exit abituguru_exit(void)
1503{
1504 platform_device_unregister(abituguru_pdev);
1505 platform_driver_unregister(&abituguru_driver);
1506}
1507
Hans de Goede93d0cc52011-03-21 17:59:36 +01001508MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
Hans de Goedef2b84bb2006-06-04 20:22:24 +02001509MODULE_DESCRIPTION("Abit uGuru Sensor device");
1510MODULE_LICENSE("GPL");
1511
1512module_init(abituguru_init);
1513module_exit(abituguru_exit);