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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Device driver for the i2c thermostat found on the iBook G4, Albook G4
3 *
4 * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt
5 *
Justin P. Mattock631dd1a2010-10-18 11:03:14 +02006 * Documentation from 115254175ADT7467_pra.pdf and 3686221171167ADT7460_b.pdf
7 * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7467
8 * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7460
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
10 */
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/types.h>
13#include <linux/module.h>
14#include <linux/errno.h>
15#include <linux/kernel.h>
16#include <linux/delay.h>
17#include <linux/sched.h>
18#include <linux/i2c.h>
19#include <linux/slab.h>
20#include <linux/init.h>
21#include <linux/spinlock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/wait.h>
23#include <linux/suspend.h>
24#include <linux/kthread.h>
25#include <linux/moduleparam.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080026#include <linux/freezer.h>
Stephen Rothwellad9e05a2008-05-23 16:27:02 +100027#include <linux/of_platform.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29#include <asm/prom.h>
30#include <asm/machdep.h>
31#include <asm/io.h>
32#include <asm/system.h>
33#include <asm/sections.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
35#undef DEBUG
36
37#define CONFIG_REG 0x40
38#define MANUAL_MASK 0xe0
39#define AUTO_MASK 0x20
Michel Dänzer0512a9a2009-05-22 10:59:10 +000040#define INVERT_MASK 0x10
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Colin Leroyd20c5072005-05-25 12:31:35 -070042static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */
43static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070044static u8 MANUAL_MODE[2] = {0x5c, 0x5d};
45static u8 REM_CONTROL[2] = {0x00, 0x40};
46static u8 FAN_SPEED[2] = {0x28, 0x2a};
47static u8 FAN_SPD_SET[2] = {0x30, 0x31};
48
Colin Leroyd20c5072005-05-25 12:31:35 -070049static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */
50static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */
Olaf Hering87275852007-02-10 21:35:12 +010051static const char *sensor_location[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Olaf Hering87275852007-02-10 21:35:12 +010053static int limit_adjust;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054static int fan_speed = -1;
Olaf Hering87275852007-02-10 21:35:12 +010055static int verbose;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57MODULE_AUTHOR("Colin Leroy <colin@colino.net>");
58MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and "
59 "Powerbook G4 Alu");
60MODULE_LICENSE("GPL");
61
62module_param(limit_adjust, int, 0644);
Colin Leroyd20c5072005-05-25 12:31:35 -070063MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) "
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 "by N degrees.");
65
66module_param(fan_speed, int, 0644);
67MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) "
68 "(default 64)");
69
Ben Collins9f6d4b02006-01-06 00:11:40 -080070module_param(verbose, bool, 0);
71MODULE_PARM_DESC(verbose,"Verbose log operations "
72 "(default 0)");
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074struct thermostat {
Jean Delvare2e613e72009-06-15 18:01:51 +020075 struct i2c_client *clt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 u8 temps[3];
77 u8 cached_temp[3];
78 u8 initial_limits[3];
79 u8 limits[3];
80 int last_speed[2];
81 int last_var[2];
Darrick J. Wong1496e892009-12-03 16:19:59 +000082 int pwm_inv[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -070083};
84
85static enum {ADT7460, ADT7467} therm_type;
86static int therm_bus, therm_address;
Grant Likely2dc11582010-08-06 09:25:50 -060087static struct platform_device * of_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088static struct thermostat* thermostat;
89static struct task_struct *thread_therm = NULL;
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091static void write_both_fan_speed(struct thermostat *th, int speed);
92static void write_fan_speed(struct thermostat *th, int speed, int fan);
Jean Delvare33a470f2010-01-31 04:00:30 +000093static void thermostat_create_files(void);
94static void thermostat_remove_files(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
96static int
97write_reg(struct thermostat* th, int reg, u8 data)
98{
99 u8 tmp[2];
100 int rc;
101
102 tmp[0] = reg;
103 tmp[1] = data;
Jean Delvare2e613e72009-06-15 18:01:51 +0200104 rc = i2c_master_send(th->clt, (const char *)tmp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 if (rc < 0)
106 return rc;
107 if (rc != 2)
108 return -ENODEV;
109 return 0;
110}
111
112static int
113read_reg(struct thermostat* th, int reg)
114{
115 u8 reg_addr, data;
116 int rc;
117
118 reg_addr = (u8)reg;
Jean Delvare2e613e72009-06-15 18:01:51 +0200119 rc = i2c_master_send(th->clt, &reg_addr, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 if (rc < 0)
121 return rc;
122 if (rc != 1)
123 return -ENODEV;
Jean Delvare2e613e72009-06-15 18:01:51 +0200124 rc = i2c_master_recv(th->clt, (char *)&data, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 if (rc < 0)
126 return rc;
127 return data;
128}
129
Jean Delvare6f6b35e2009-10-04 22:53:46 +0200130static struct i2c_driver thermostat_driver;
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132static int
133attach_thermostat(struct i2c_adapter *adapter)
134{
135 unsigned long bus_no;
Jean Delvare2e613e72009-06-15 18:01:51 +0200136 struct i2c_board_info info;
137 struct i2c_client *client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139 if (strncmp(adapter->name, "uni-n", 5))
140 return -ENODEV;
141 bus_no = simple_strtoul(adapter->name + 6, NULL, 10);
142 if (bus_no != therm_bus)
143 return -ENODEV;
Jean Delvare2e613e72009-06-15 18:01:51 +0200144
145 memset(&info, 0, sizeof(struct i2c_board_info));
146 strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE);
147 info.addr = therm_address;
148 client = i2c_new_device(adapter, &info);
149 if (!client)
150 return -ENODEV;
151
152 /*
153 * Let i2c-core delete that device on driver removal.
154 * This is safe because i2c-core holds the core_lock mutex for us.
155 */
Jean Delvare6f6b35e2009-10-04 22:53:46 +0200156 list_add_tail(&client->detected, &thermostat_driver.clients);
Jean Delvare2e613e72009-06-15 18:01:51 +0200157 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158}
159
160static int
Jean Delvare2e613e72009-06-15 18:01:51 +0200161remove_thermostat(struct i2c_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162{
Jean Delvare2e613e72009-06-15 18:01:51 +0200163 struct thermostat *th = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 int i;
165
Jean Delvare33a470f2010-01-31 04:00:30 +0000166 thermostat_remove_files();
167
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 if (thread_therm != NULL) {
169 kthread_stop(thread_therm);
170 }
Ben Collins9f6d4b02006-01-06 00:11:40 -0800171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 printk(KERN_INFO "adt746x: Putting max temperatures back from "
173 "%d, %d, %d to %d, %d, %d\n",
174 th->limits[0], th->limits[1], th->limits[2],
175 th->initial_limits[0], th->initial_limits[1],
176 th->initial_limits[2]);
Ben Collins9f6d4b02006-01-06 00:11:40 -0800177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 for (i = 0; i < 3; i++)
179 write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
180
181 write_both_fan_speed(th, -1);
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 thermostat = NULL;
184
185 kfree(th);
186
187 return 0;
188}
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190static int read_fan_speed(struct thermostat *th, u8 addr)
191{
192 u8 tmp[2];
193 u16 res;
194
195 /* should start with low byte */
196 tmp[1] = read_reg(th, addr);
197 tmp[0] = read_reg(th, addr + 1);
198
199 res = tmp[1] + (tmp[0] << 8);
200 /* "a value of 0xffff means that the fan has stopped" */
201 return (res == 0xffff ? 0 : (90000*60)/res);
202}
203
204static void write_both_fan_speed(struct thermostat *th, int speed)
205{
206 write_fan_speed(th, speed, 0);
207 if (therm_type == ADT7460)
208 write_fan_speed(th, speed, 1);
209}
210
211static void write_fan_speed(struct thermostat *th, int speed, int fan)
212{
213 u8 manual;
214
215 if (speed > 0xff)
216 speed = 0xff;
217 else if (speed < -1)
218 speed = 0;
219
220 if (therm_type == ADT7467 && fan == 1)
221 return;
222
223 if (th->last_speed[fan] != speed) {
Ben Collins9f6d4b02006-01-06 00:11:40 -0800224 if (verbose) {
225 if (speed == -1)
226 printk(KERN_DEBUG "adt746x: Setting speed to automatic "
227 "for %s fan.\n", sensor_location[fan+1]);
228 else
229 printk(KERN_DEBUG "adt746x: Setting speed to %d "
230 "for %s fan.\n", speed, sensor_location[fan+1]);
231 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 } else
233 return;
234
235 if (speed >= 0) {
236 manual = read_reg(th, MANUAL_MODE[fan]);
Darrick J. Wong1496e892009-12-03 16:19:59 +0000237 manual &= ~INVERT_MASK;
Michel Dänzer0512a9a2009-05-22 10:59:10 +0000238 write_reg(th, MANUAL_MODE[fan],
Darrick J. Wong1496e892009-12-03 16:19:59 +0000239 manual | MANUAL_MASK | th->pwm_inv[fan]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 write_reg(th, FAN_SPD_SET[fan], speed);
241 } else {
242 /* back to automatic */
243 if(therm_type == ADT7460) {
244 manual = read_reg(th,
245 MANUAL_MODE[fan]) & (~MANUAL_MASK);
Darrick J. Wong1496e892009-12-03 16:19:59 +0000246 manual &= ~INVERT_MASK;
247 manual |= th->pwm_inv[fan];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 write_reg(th,
249 MANUAL_MODE[fan], manual|REM_CONTROL[fan]);
250 } else {
251 manual = read_reg(th, MANUAL_MODE[fan]);
Darrick J. Wong1496e892009-12-03 16:19:59 +0000252 manual &= ~INVERT_MASK;
253 manual |= th->pwm_inv[fan];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK));
255 }
256 }
257
258 th->last_speed[fan] = speed;
259}
260
261static void read_sensors(struct thermostat *th)
262{
263 int i = 0;
264
265 for (i = 0; i < 3; i++)
266 th->temps[i] = read_reg(th, TEMP_REG[i]);
267}
268
269#ifdef DEBUG
270static void display_stats(struct thermostat *th)
271{
272 if (th->temps[0] != th->cached_temp[0]
273 || th->temps[1] != th->cached_temp[1]
274 || th->temps[2] != th->cached_temp[2]) {
275 printk(KERN_INFO "adt746x: Temperature infos:"
276 " thermostats: %d,%d,%d;"
277 " limits: %d,%d,%d;"
278 " fan speed: %d RPM\n",
279 th->temps[0], th->temps[1], th->temps[2],
280 th->limits[0], th->limits[1], th->limits[2],
281 read_fan_speed(th, FAN_SPEED[0]));
282 }
283 th->cached_temp[0] = th->temps[0];
284 th->cached_temp[1] = th->temps[1];
285 th->cached_temp[2] = th->temps[2];
286}
287#endif
288
289static void update_fans_speed (struct thermostat *th)
290{
291 int lastvar = 0; /* last variation, for iBook */
292 int i = 0;
293
294 /* we don't care about local sensor, so we start at sensor 1 */
295 for (i = 1; i < 3; i++) {
296 int started = 0;
297 int fan_number = (therm_type == ADT7460 && i == 2);
298 int var = th->temps[i] - th->limits[i];
299
300 if (var > -1) {
301 int step = (255 - fan_speed) / 7;
302 int new_speed = 0;
303
304 /* hysteresis : change fan speed only if variation is
305 * more than two degrees */
306 if (abs(var - th->last_var[fan_number]) < 2)
307 continue;
308
309 started = 1;
310 new_speed = fan_speed + ((var-1)*step);
311
312 if (new_speed < fan_speed)
313 new_speed = fan_speed;
314 if (new_speed > 255)
315 new_speed = 255;
316
Ben Collins9f6d4b02006-01-06 00:11:40 -0800317 if (verbose)
318 printk(KERN_DEBUG "adt746x: Setting fans speed to %d "
Frans Pop8354be92010-02-06 07:47:20 +0000319 "(limit exceeded by %d on %s)\n",
Ben Collins9f6d4b02006-01-06 00:11:40 -0800320 new_speed, var,
321 sensor_location[fan_number+1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 write_both_fan_speed(th, new_speed);
323 th->last_var[fan_number] = var;
324 } else if (var < -2) {
Colin Leroyd20c5072005-05-25 12:31:35 -0700325 /* don't stop fan if sensor2 is cold and sensor1 is not
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 * so cold (lastvar >= -1) */
327 if (i == 2 && lastvar < -1) {
328 if (th->last_speed[fan_number] != 0)
Ben Collins9f6d4b02006-01-06 00:11:40 -0800329 if (verbose)
330 printk(KERN_DEBUG "adt746x: Stopping "
331 "fans.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 write_both_fan_speed(th, 0);
333 }
334 }
335
336 lastvar = var;
337
338 if (started)
339 return; /* we don't want to re-stop the fan
Colin Leroyd20c5072005-05-25 12:31:35 -0700340 * if sensor1 is heating and sensor2 is not */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 }
342}
343
344static int monitor_task(void *arg)
345{
346 struct thermostat* th = arg;
347
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700348 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 while(!kthread_should_stop()) {
Christoph Lameter3e1d1d22005-06-24 23:13:50 -0700350 try_to_freeze();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 msleep_interruptible(2000);
352
353#ifndef DEBUG
354 if (fan_speed != -1)
355 read_sensors(th);
356#else
357 read_sensors(th);
358#endif
359
360 if (fan_speed != -1)
361 update_fans_speed(th);
362
363#ifdef DEBUG
364 display_stats(th);
365#endif
366
367 }
368
369 return 0;
370}
371
372static void set_limit(struct thermostat *th, int i)
373{
Colin Leroyd20c5072005-05-25 12:31:35 -0700374 /* Set sensor1 limit higher to avoid powerdowns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 th->limits[i] = default_limits_chip[i] + limit_adjust;
376 write_reg(th, LIMIT_REG[i], th->limits[i]);
377
378 /* set our limits to normal */
379 th->limits[i] = default_limits_local[i] + limit_adjust;
380}
381
Jean Delvare2e613e72009-06-15 18:01:51 +0200382static int probe_thermostat(struct i2c_client *client,
383 const struct i2c_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
385 struct thermostat* th;
386 int rc;
387 int i;
388
389 if (thermostat)
390 return 0;
391
Mariusz Kozlowskicc61f952007-08-01 08:10:03 +1000392 th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 if (!th)
394 return -ENOMEM;
395
Jean Delvare2e613e72009-06-15 18:01:51 +0200396 i2c_set_clientdata(client, th);
397 th->clt = client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
Jean Delvare99ca177a2009-10-14 05:31:32 +0000399 rc = read_reg(th, CONFIG_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 if (rc < 0) {
Jean Delvare2e613e72009-06-15 18:01:51 +0200401 dev_err(&client->dev, "Thermostat failed to read config!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 kfree(th);
403 return -ENODEV;
404 }
405
406 /* force manual control to start the fan quieter */
407 if (fan_speed == -1)
408 fan_speed = 64;
409
410 if(therm_type == ADT7460) {
411 printk(KERN_INFO "adt746x: ADT7460 initializing\n");
412 /* The 7460 needs to be started explicitly */
413 write_reg(th, CONFIG_REG, 1);
414 } else
415 printk(KERN_INFO "adt746x: ADT7467 initializing\n");
416
417 for (i = 0; i < 3; i++) {
418 th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
419 set_limit(th, i);
420 }
Ben Collins9f6d4b02006-01-06 00:11:40 -0800421
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
423 " to %d, %d, %d\n",
424 th->initial_limits[0], th->initial_limits[1],
425 th->initial_limits[2], th->limits[0], th->limits[1],
426 th->limits[2]);
427
428 thermostat = th;
429
Darrick J. Wong1496e892009-12-03 16:19:59 +0000430 /* record invert bit status because fw can corrupt it after suspend */
431 th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
432 th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 /* be sure to really write fan speed the first time */
435 th->last_speed[0] = -2;
436 th->last_speed[1] = -2;
437 th->last_var[0] = -80;
438 th->last_var[1] = -80;
439
440 if (fan_speed != -1) {
441 /* manual mode, stop fans */
442 write_both_fan_speed(th, 0);
443 } else {
444 /* automatic mode */
445 write_both_fan_speed(th, -1);
446 }
447
448 thread_therm = kthread_run(monitor_task, th, "kfand");
449
450 if (thread_therm == ERR_PTR(-ENOMEM)) {
451 printk(KERN_INFO "adt746x: Kthread creation failed\n");
452 thread_therm = NULL;
453 return -ENOMEM;
454 }
455
Jean Delvare33a470f2010-01-31 04:00:30 +0000456 thermostat_create_files();
457
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 return 0;
459}
460
Jean Delvare2e613e72009-06-15 18:01:51 +0200461static const struct i2c_device_id therm_adt746x_id[] = {
462 { "therm_adt746x", 0 },
463 { }
464};
465
466static struct i2c_driver thermostat_driver = {
467 .driver = {
468 .name = "therm_adt746x",
469 },
470 .attach_adapter = attach_thermostat,
471 .probe = probe_thermostat,
472 .remove = remove_thermostat,
473 .id_table = therm_adt746x_id,
474};
475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476/*
477 * Now, unfortunately, sysfs doesn't give us a nice void * we could
478 * pass around to the attribute functions, so we don't really have
479 * choice but implement a bunch of them...
480 *
Yani Ioannoue404e272005-05-17 06:42:58 -0400481 * FIXME, it does now...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 */
483#define BUILD_SHOW_FUNC_INT(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400484static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{ \
486 return sprintf(buf, "%d\n", data); \
487}
488
Colin Leroyd20c5072005-05-25 12:31:35 -0700489#define BUILD_SHOW_FUNC_STR(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400490static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
Colin Leroyd20c5072005-05-25 12:31:35 -0700491{ \
492 return sprintf(buf, "%s\n", data); \
493}
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495#define BUILD_SHOW_FUNC_FAN(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400496static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497{ \
498 return sprintf(buf, "%d (%d rpm)\n", \
499 thermostat->last_speed[data], \
500 read_fan_speed(thermostat, FAN_SPEED[data]) \
501 ); \
502}
503
504#define BUILD_STORE_FUNC_DEG(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400505static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{ \
507 int val; \
508 int i; \
509 val = simple_strtol(buf, NULL, 10); \
Colin Leroyd20c5072005-05-25 12:31:35 -0700510 printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 limit_adjust = val; \
512 for (i=0; i < 3; i++) \
513 set_limit(thermostat, i); \
514 return n; \
515}
516
517#define BUILD_STORE_FUNC_INT(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400518static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{ \
roel kluin2e747782009-01-18 02:03:47 +0000520 int val; \
521 val = simple_strtol(buf, NULL, 10); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (val < 0 || val > 255) \
523 return -EINVAL; \
524 printk(KERN_INFO "Setting specified fan speed to %d\n", val); \
525 data = val; \
526 return n; \
527}
528
Colin Leroyd20c5072005-05-25 12:31:35 -0700529BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1])))
530BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2])))
531BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1])
532BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2])
533BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1])
534BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
536BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed)
Colin Leroyd20c5072005-05-25 12:31:35 -0700537BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0)
538BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
540BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
541BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust)
542BUILD_STORE_FUNC_DEG(limit_adjust, thermostat)
543
Colin Leroyd20c5072005-05-25 12:31:35 -0700544static DEVICE_ATTR(sensor1_temperature, S_IRUGO,
545 show_sensor1_temperature,NULL);
546static DEVICE_ATTR(sensor2_temperature, S_IRUGO,
547 show_sensor2_temperature,NULL);
548static DEVICE_ATTR(sensor1_limit, S_IRUGO,
549 show_sensor1_limit, NULL);
550static DEVICE_ATTR(sensor2_limit, S_IRUGO,
551 show_sensor2_limit, NULL);
552static DEVICE_ATTR(sensor1_location, S_IRUGO,
553 show_sensor1_location, NULL);
554static DEVICE_ATTR(sensor2_location, S_IRUGO,
555 show_sensor2_location, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
557static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
558 show_specified_fan_speed,store_specified_fan_speed);
559
Colin Leroyd20c5072005-05-25 12:31:35 -0700560static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO,
561 show_sensor1_fan_speed, NULL);
562static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO,
563 show_sensor2_fan_speed, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
566 show_limit_adjust, store_limit_adjust);
567
568
569static int __init
570thermostat_init(void)
571{
572 struct device_node* np;
Jeremy Kerr018a3d12006-07-12 15:40:29 +1000573 const u32 *prop;
Colin Leroyd20c5072005-05-25 12:31:35 -0700574 int i = 0, offset = 0;
Nicolas Palix44ea9c82009-01-06 14:41:35 -0800575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 np = of_find_node_by_name(NULL, "fan");
577 if (!np)
578 return -ENODEV;
Stephen Rothwell55b61fe2007-05-03 17:26:52 +1000579 if (of_device_is_compatible(np, "adt7460"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 therm_type = ADT7460;
Stephen Rothwell55b61fe2007-05-03 17:26:52 +1000581 else if (of_device_is_compatible(np, "adt7467"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 therm_type = ADT7467;
Julia Lawall958a65f2008-06-09 22:21:51 +1000583 else {
584 of_node_put(np);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 return -ENODEV;
Julia Lawall958a65f2008-06-09 22:21:51 +1000586 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Stephen Rothwell01b27262007-04-27 13:41:15 +1000588 prop = of_get_property(np, "hwsensor-params-version", NULL);
Colin Leroya8bacec2005-05-25 12:31:34 -0700589 printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop,
590 (*prop == 1)?"":"un");
Julia Lawall958a65f2008-06-09 22:21:51 +1000591 if (*prop != 1) {
592 of_node_put(np);
Colin Leroya8bacec2005-05-25 12:31:34 -0700593 return -ENODEV;
Julia Lawall958a65f2008-06-09 22:21:51 +1000594 }
Colin Leroya8bacec2005-05-25 12:31:34 -0700595
Stephen Rothwell01b27262007-04-27 13:41:15 +1000596 prop = of_get_property(np, "reg", NULL);
Julia Lawall958a65f2008-06-09 22:21:51 +1000597 if (!prop) {
598 of_node_put(np);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 return -ENODEV;
Julia Lawall958a65f2008-06-09 22:21:51 +1000600 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
602 /* look for bus either by path or using "reg" */
603 if (strstr(np->full_name, "/i2c-bus@") != NULL) {
604 const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9);
605 therm_bus = tmp_bus[0]-'0';
606 } else {
607 therm_bus = ((*prop) >> 8) & 0x0f;
608 }
609
610 therm_address = ((*prop) & 0xff) >> 1;
611
612 printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, "
613 "limit_adjust: %d, fan_speed: %d\n",
614 therm_bus, therm_address, limit_adjust, fan_speed);
615
Stephen Rothwell01b27262007-04-27 13:41:15 +1000616 if (of_get_property(np, "hwsensor-location", NULL)) {
Colin Leroyd20c5072005-05-25 12:31:35 -0700617 for (i = 0; i < 3; i++) {
Stephen Rothwell01b27262007-04-27 13:41:15 +1000618 sensor_location[i] = of_get_property(np,
Colin Leroyd20c5072005-05-25 12:31:35 -0700619 "hwsensor-location", NULL) + offset;
620
621 if (sensor_location[i] == NULL)
622 sensor_location[i] = "";
623
624 printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]);
625 offset += strlen(sensor_location[i]) + 1;
626 }
627 } else {
628 sensor_location[0] = "?";
629 sensor_location[1] = "?";
630 sensor_location[2] = "?";
631 }
632
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700633 of_dev = of_platform_device_create(np, "temperatures", NULL);
Nicolas Palix44ea9c82009-01-06 14:41:35 -0800634 of_node_put(np);
635
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 if (of_dev == NULL) {
637 printk(KERN_ERR "Can't register temperatures device !\n");
638 return -ENODEV;
639 }
Nicolas Palix44ea9c82009-01-06 14:41:35 -0800640
Jean Delvare33a470f2010-01-31 04:00:30 +0000641#ifndef CONFIG_I2C_POWERMAC
642 request_module("i2c-powermac");
643#endif
644
645 return i2c_add_driver(&thermostat_driver);
646}
647
648static void thermostat_create_files(void)
649{
650 int err;
651
Stephen Rothwell10804f02008-01-03 15:17:12 +1100652 err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature);
653 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature);
654 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit);
655 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit);
656 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location);
657 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location);
658 err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust);
659 err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed);
660 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 if(therm_type == ADT7460)
Stephen Rothwell10804f02008-01-03 15:17:12 +1100662 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed);
663 if (err)
664 printk(KERN_WARNING
665 "Failed to create tempertaure attribute file(s).\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666}
667
Jean Delvare33a470f2010-01-31 04:00:30 +0000668static void thermostat_remove_files(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669{
670 if (of_dev) {
Colin Leroyd20c5072005-05-25 12:31:35 -0700671 device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature);
672 device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature);
673 device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit);
674 device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit);
675 device_remove_file(&of_dev->dev, &dev_attr_sensor1_location);
676 device_remove_file(&of_dev->dev, &dev_attr_sensor2_location);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 device_remove_file(&of_dev->dev, &dev_attr_limit_adjust);
678 device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed);
Colin Leroyd20c5072005-05-25 12:31:35 -0700679 device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
681 if(therm_type == ADT7460)
682 device_remove_file(&of_dev->dev,
Colin Leroyd20c5072005-05-25 12:31:35 -0700683 &dev_attr_sensor2_fan_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 }
Jean Delvare33a470f2010-01-31 04:00:30 +0000686}
687
688static void __exit
689thermostat_exit(void)
690{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 i2c_del_driver(&thermostat_driver);
Jean Delvare33a470f2010-01-31 04:00:30 +0000692 of_device_unregister(of_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693}
694
695module_init(thermostat_init);
696module_exit(thermostat_exit);