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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/sections.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34#undef DEBUG
35
36#define CONFIG_REG 0x40
37#define MANUAL_MASK 0xe0
38#define AUTO_MASK 0x20
Michel Dänzer0512a9a2009-05-22 10:59:10 +000039#define INVERT_MASK 0x10
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Colin Leroyd20c5072005-05-25 12:31:35 -070041static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */
42static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070043static u8 MANUAL_MODE[2] = {0x5c, 0x5d};
44static u8 REM_CONTROL[2] = {0x00, 0x40};
45static u8 FAN_SPEED[2] = {0x28, 0x2a};
46static u8 FAN_SPD_SET[2] = {0x30, 0x31};
47
Colin Leroyd20c5072005-05-25 12:31:35 -070048static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */
49static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */
Olaf Hering87275852007-02-10 21:35:12 +010050static const char *sensor_location[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Olaf Hering87275852007-02-10 21:35:12 +010052static int limit_adjust;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053static int fan_speed = -1;
Rusty Russell90ab5ee2012-01-13 09:32:20 +103054static bool verbose;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56MODULE_AUTHOR("Colin Leroy <colin@colino.net>");
57MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and "
58 "Powerbook G4 Alu");
59MODULE_LICENSE("GPL");
60
61module_param(limit_adjust, int, 0644);
Colin Leroyd20c5072005-05-25 12:31:35 -070062MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) "
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 "by N degrees.");
64
65module_param(fan_speed, int, 0644);
66MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) "
67 "(default 64)");
68
Ben Collins9f6d4b02006-01-06 00:11:40 -080069module_param(verbose, bool, 0);
70MODULE_PARM_DESC(verbose,"Verbose log operations "
71 "(default 0)");
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073struct thermostat {
Jean Delvare2e613e72009-06-15 18:01:51 +020074 struct i2c_client *clt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 u8 temps[3];
76 u8 cached_temp[3];
77 u8 initial_limits[3];
78 u8 limits[3];
79 int last_speed[2];
80 int last_var[2];
Darrick J. Wong1496e892009-12-03 16:19:59 +000081 int pwm_inv[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -070082};
83
84static enum {ADT7460, ADT7467} therm_type;
85static int therm_bus, therm_address;
Grant Likely2dc11582010-08-06 09:25:50 -060086static struct platform_device * of_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087static struct thermostat* thermostat;
88static struct task_struct *thread_therm = NULL;
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090static void write_both_fan_speed(struct thermostat *th, int speed);
91static void write_fan_speed(struct thermostat *th, int speed, int fan);
Jean Delvare33a470f2010-01-31 04:00:30 +000092static void thermostat_create_files(void);
93static void thermostat_remove_files(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95static int
96write_reg(struct thermostat* th, int reg, u8 data)
97{
98 u8 tmp[2];
99 int rc;
100
101 tmp[0] = reg;
102 tmp[1] = data;
Jean Delvare2e613e72009-06-15 18:01:51 +0200103 rc = i2c_master_send(th->clt, (const char *)tmp, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 if (rc < 0)
105 return rc;
106 if (rc != 2)
107 return -ENODEV;
108 return 0;
109}
110
111static int
112read_reg(struct thermostat* th, int reg)
113{
114 u8 reg_addr, data;
115 int rc;
116
117 reg_addr = (u8)reg;
Jean Delvare2e613e72009-06-15 18:01:51 +0200118 rc = i2c_master_send(th->clt, &reg_addr, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 if (rc < 0)
120 return rc;
121 if (rc != 1)
122 return -ENODEV;
Jean Delvare2e613e72009-06-15 18:01:51 +0200123 rc = i2c_master_recv(th->clt, (char *)&data, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 if (rc < 0)
125 return rc;
126 return data;
127}
128
Jean Delvare6f6b35e2009-10-04 22:53:46 +0200129static struct i2c_driver thermostat_driver;
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131static int
132attach_thermostat(struct i2c_adapter *adapter)
133{
134 unsigned long bus_no;
Jean Delvare2e613e72009-06-15 18:01:51 +0200135 struct i2c_board_info info;
136 struct i2c_client *client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138 if (strncmp(adapter->name, "uni-n", 5))
139 return -ENODEV;
140 bus_no = simple_strtoul(adapter->name + 6, NULL, 10);
141 if (bus_no != therm_bus)
142 return -ENODEV;
Jean Delvare2e613e72009-06-15 18:01:51 +0200143
144 memset(&info, 0, sizeof(struct i2c_board_info));
145 strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE);
146 info.addr = therm_address;
147 client = i2c_new_device(adapter, &info);
148 if (!client)
149 return -ENODEV;
150
151 /*
152 * Let i2c-core delete that device on driver removal.
153 * This is safe because i2c-core holds the core_lock mutex for us.
154 */
Jean Delvare6f6b35e2009-10-04 22:53:46 +0200155 list_add_tail(&client->detected, &thermostat_driver.clients);
Jean Delvare2e613e72009-06-15 18:01:51 +0200156 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157}
158
159static int
Jean Delvare2e613e72009-06-15 18:01:51 +0200160remove_thermostat(struct i2c_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161{
Jean Delvare2e613e72009-06-15 18:01:51 +0200162 struct thermostat *th = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 int i;
164
Jean Delvare33a470f2010-01-31 04:00:30 +0000165 thermostat_remove_files();
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 if (thread_therm != NULL) {
168 kthread_stop(thread_therm);
169 }
Ben Collins9f6d4b02006-01-06 00:11:40 -0800170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 printk(KERN_INFO "adt746x: Putting max temperatures back from "
172 "%d, %d, %d to %d, %d, %d\n",
173 th->limits[0], th->limits[1], th->limits[2],
174 th->initial_limits[0], th->initial_limits[1],
175 th->initial_limits[2]);
Ben Collins9f6d4b02006-01-06 00:11:40 -0800176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 for (i = 0; i < 3; i++)
178 write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
179
180 write_both_fan_speed(th, -1);
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 thermostat = NULL;
183
184 kfree(th);
185
186 return 0;
187}
188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189static int read_fan_speed(struct thermostat *th, u8 addr)
190{
191 u8 tmp[2];
192 u16 res;
193
194 /* should start with low byte */
195 tmp[1] = read_reg(th, addr);
196 tmp[0] = read_reg(th, addr + 1);
197
198 res = tmp[1] + (tmp[0] << 8);
199 /* "a value of 0xffff means that the fan has stopped" */
200 return (res == 0xffff ? 0 : (90000*60)/res);
201}
202
203static void write_both_fan_speed(struct thermostat *th, int speed)
204{
205 write_fan_speed(th, speed, 0);
206 if (therm_type == ADT7460)
207 write_fan_speed(th, speed, 1);
208}
209
210static void write_fan_speed(struct thermostat *th, int speed, int fan)
211{
212 u8 manual;
213
214 if (speed > 0xff)
215 speed = 0xff;
216 else if (speed < -1)
217 speed = 0;
218
219 if (therm_type == ADT7467 && fan == 1)
220 return;
221
222 if (th->last_speed[fan] != speed) {
Ben Collins9f6d4b02006-01-06 00:11:40 -0800223 if (verbose) {
224 if (speed == -1)
225 printk(KERN_DEBUG "adt746x: Setting speed to automatic "
226 "for %s fan.\n", sensor_location[fan+1]);
227 else
228 printk(KERN_DEBUG "adt746x: Setting speed to %d "
229 "for %s fan.\n", speed, sensor_location[fan+1]);
230 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 } else
232 return;
233
234 if (speed >= 0) {
235 manual = read_reg(th, MANUAL_MODE[fan]);
Darrick J. Wong1496e892009-12-03 16:19:59 +0000236 manual &= ~INVERT_MASK;
Michel Dänzer0512a9a2009-05-22 10:59:10 +0000237 write_reg(th, MANUAL_MODE[fan],
Darrick J. Wong1496e892009-12-03 16:19:59 +0000238 manual | MANUAL_MASK | th->pwm_inv[fan]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 write_reg(th, FAN_SPD_SET[fan], speed);
240 } else {
241 /* back to automatic */
242 if(therm_type == ADT7460) {
243 manual = read_reg(th,
244 MANUAL_MODE[fan]) & (~MANUAL_MASK);
Darrick J. Wong1496e892009-12-03 16:19:59 +0000245 manual &= ~INVERT_MASK;
246 manual |= th->pwm_inv[fan];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 write_reg(th,
248 MANUAL_MODE[fan], manual|REM_CONTROL[fan]);
249 } else {
250 manual = read_reg(th, MANUAL_MODE[fan]);
Darrick J. Wong1496e892009-12-03 16:19:59 +0000251 manual &= ~INVERT_MASK;
252 manual |= th->pwm_inv[fan];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK));
254 }
255 }
256
257 th->last_speed[fan] = speed;
258}
259
260static void read_sensors(struct thermostat *th)
261{
262 int i = 0;
263
264 for (i = 0; i < 3; i++)
265 th->temps[i] = read_reg(th, TEMP_REG[i]);
266}
267
268#ifdef DEBUG
269static void display_stats(struct thermostat *th)
270{
271 if (th->temps[0] != th->cached_temp[0]
272 || th->temps[1] != th->cached_temp[1]
273 || th->temps[2] != th->cached_temp[2]) {
274 printk(KERN_INFO "adt746x: Temperature infos:"
275 " thermostats: %d,%d,%d;"
276 " limits: %d,%d,%d;"
277 " fan speed: %d RPM\n",
278 th->temps[0], th->temps[1], th->temps[2],
279 th->limits[0], th->limits[1], th->limits[2],
280 read_fan_speed(th, FAN_SPEED[0]));
281 }
282 th->cached_temp[0] = th->temps[0];
283 th->cached_temp[1] = th->temps[1];
284 th->cached_temp[2] = th->temps[2];
285}
286#endif
287
288static void update_fans_speed (struct thermostat *th)
289{
290 int lastvar = 0; /* last variation, for iBook */
291 int i = 0;
292
293 /* we don't care about local sensor, so we start at sensor 1 */
294 for (i = 1; i < 3; i++) {
295 int started = 0;
296 int fan_number = (therm_type == ADT7460 && i == 2);
297 int var = th->temps[i] - th->limits[i];
298
299 if (var > -1) {
300 int step = (255 - fan_speed) / 7;
301 int new_speed = 0;
302
303 /* hysteresis : change fan speed only if variation is
304 * more than two degrees */
305 if (abs(var - th->last_var[fan_number]) < 2)
306 continue;
307
308 started = 1;
309 new_speed = fan_speed + ((var-1)*step);
310
311 if (new_speed < fan_speed)
312 new_speed = fan_speed;
313 if (new_speed > 255)
314 new_speed = 255;
315
Ben Collins9f6d4b02006-01-06 00:11:40 -0800316 if (verbose)
317 printk(KERN_DEBUG "adt746x: Setting fans speed to %d "
Frans Pop8354be92010-02-06 07:47:20 +0000318 "(limit exceeded by %d on %s)\n",
Ben Collins9f6d4b02006-01-06 00:11:40 -0800319 new_speed, var,
320 sensor_location[fan_number+1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 write_both_fan_speed(th, new_speed);
322 th->last_var[fan_number] = var;
323 } else if (var < -2) {
Colin Leroyd20c5072005-05-25 12:31:35 -0700324 /* don't stop fan if sensor2 is cold and sensor1 is not
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 * so cold (lastvar >= -1) */
326 if (i == 2 && lastvar < -1) {
327 if (th->last_speed[fan_number] != 0)
Ben Collins9f6d4b02006-01-06 00:11:40 -0800328 if (verbose)
329 printk(KERN_DEBUG "adt746x: Stopping "
330 "fans.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 write_both_fan_speed(th, 0);
332 }
333 }
334
335 lastvar = var;
336
337 if (started)
338 return; /* we don't want to re-stop the fan
Colin Leroyd20c5072005-05-25 12:31:35 -0700339 * if sensor1 is heating and sensor2 is not */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 }
341}
342
343static int monitor_task(void *arg)
344{
345 struct thermostat* th = arg;
346
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700347 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 while(!kthread_should_stop()) {
Christoph Lameter3e1d1d22005-06-24 23:13:50 -0700349 try_to_freeze();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 msleep_interruptible(2000);
351
352#ifndef DEBUG
353 if (fan_speed != -1)
354 read_sensors(th);
355#else
356 read_sensors(th);
357#endif
358
359 if (fan_speed != -1)
360 update_fans_speed(th);
361
362#ifdef DEBUG
363 display_stats(th);
364#endif
365
366 }
367
368 return 0;
369}
370
371static void set_limit(struct thermostat *th, int i)
372{
Colin Leroyd20c5072005-05-25 12:31:35 -0700373 /* Set sensor1 limit higher to avoid powerdowns */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 th->limits[i] = default_limits_chip[i] + limit_adjust;
375 write_reg(th, LIMIT_REG[i], th->limits[i]);
376
377 /* set our limits to normal */
378 th->limits[i] = default_limits_local[i] + limit_adjust;
379}
380
Jean Delvare2e613e72009-06-15 18:01:51 +0200381static int probe_thermostat(struct i2c_client *client,
382 const struct i2c_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
384 struct thermostat* th;
385 int rc;
386 int i;
387
388 if (thermostat)
389 return 0;
390
Mariusz Kozlowskicc61f952007-08-01 08:10:03 +1000391 th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (!th)
393 return -ENOMEM;
394
Jean Delvare2e613e72009-06-15 18:01:51 +0200395 i2c_set_clientdata(client, th);
396 th->clt = client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
Jean Delvare99ca177a2009-10-14 05:31:32 +0000398 rc = read_reg(th, CONFIG_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 if (rc < 0) {
Jean Delvare2e613e72009-06-15 18:01:51 +0200400 dev_err(&client->dev, "Thermostat failed to read config!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 kfree(th);
402 return -ENODEV;
403 }
404
405 /* force manual control to start the fan quieter */
406 if (fan_speed == -1)
407 fan_speed = 64;
408
409 if(therm_type == ADT7460) {
410 printk(KERN_INFO "adt746x: ADT7460 initializing\n");
411 /* The 7460 needs to be started explicitly */
412 write_reg(th, CONFIG_REG, 1);
413 } else
414 printk(KERN_INFO "adt746x: ADT7467 initializing\n");
415
416 for (i = 0; i < 3; i++) {
417 th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
418 set_limit(th, i);
419 }
Ben Collins9f6d4b02006-01-06 00:11:40 -0800420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
422 " to %d, %d, %d\n",
423 th->initial_limits[0], th->initial_limits[1],
424 th->initial_limits[2], th->limits[0], th->limits[1],
425 th->limits[2]);
426
427 thermostat = th;
428
Darrick J. Wong1496e892009-12-03 16:19:59 +0000429 /* record invert bit status because fw can corrupt it after suspend */
430 th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
431 th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 /* be sure to really write fan speed the first time */
434 th->last_speed[0] = -2;
435 th->last_speed[1] = -2;
436 th->last_var[0] = -80;
437 th->last_var[1] = -80;
438
439 if (fan_speed != -1) {
440 /* manual mode, stop fans */
441 write_both_fan_speed(th, 0);
442 } else {
443 /* automatic mode */
444 write_both_fan_speed(th, -1);
445 }
446
447 thread_therm = kthread_run(monitor_task, th, "kfand");
448
449 if (thread_therm == ERR_PTR(-ENOMEM)) {
450 printk(KERN_INFO "adt746x: Kthread creation failed\n");
451 thread_therm = NULL;
452 return -ENOMEM;
453 }
454
Jean Delvare33a470f2010-01-31 04:00:30 +0000455 thermostat_create_files();
456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 return 0;
458}
459
Jean Delvare2e613e72009-06-15 18:01:51 +0200460static const struct i2c_device_id therm_adt746x_id[] = {
461 { "therm_adt746x", 0 },
462 { }
463};
464
465static struct i2c_driver thermostat_driver = {
466 .driver = {
467 .name = "therm_adt746x",
468 },
469 .attach_adapter = attach_thermostat,
470 .probe = probe_thermostat,
471 .remove = remove_thermostat,
472 .id_table = therm_adt746x_id,
473};
474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475/*
476 * Now, unfortunately, sysfs doesn't give us a nice void * we could
477 * pass around to the attribute functions, so we don't really have
478 * choice but implement a bunch of them...
479 *
Yani Ioannoue404e272005-05-17 06:42:58 -0400480 * FIXME, it does now...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 */
482#define BUILD_SHOW_FUNC_INT(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400483static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484{ \
485 return sprintf(buf, "%d\n", data); \
486}
487
Colin Leroyd20c5072005-05-25 12:31:35 -0700488#define BUILD_SHOW_FUNC_STR(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400489static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
Colin Leroyd20c5072005-05-25 12:31:35 -0700490{ \
491 return sprintf(buf, "%s\n", data); \
492}
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494#define BUILD_SHOW_FUNC_FAN(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400495static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496{ \
497 return sprintf(buf, "%d (%d rpm)\n", \
498 thermostat->last_speed[data], \
499 read_fan_speed(thermostat, FAN_SPEED[data]) \
500 ); \
501}
502
503#define BUILD_STORE_FUNC_DEG(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400504static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505{ \
506 int val; \
507 int i; \
508 val = simple_strtol(buf, NULL, 10); \
Colin Leroyd20c5072005-05-25 12:31:35 -0700509 printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 limit_adjust = val; \
511 for (i=0; i < 3; i++) \
512 set_limit(thermostat, i); \
513 return n; \
514}
515
516#define BUILD_STORE_FUNC_INT(name, data) \
Yani Ioannoue404e272005-05-17 06:42:58 -0400517static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518{ \
roel kluin2e747782009-01-18 02:03:47 +0000519 int val; \
520 val = simple_strtol(buf, NULL, 10); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 if (val < 0 || val > 255) \
522 return -EINVAL; \
523 printk(KERN_INFO "Setting specified fan speed to %d\n", val); \
524 data = val; \
525 return n; \
526}
527
Colin Leroyd20c5072005-05-25 12:31:35 -0700528BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1])))
529BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2])))
530BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1])
531BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2])
532BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1])
533BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed)
Colin Leroyd20c5072005-05-25 12:31:35 -0700536BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0)
537BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
539BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
540BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust)
541BUILD_STORE_FUNC_DEG(limit_adjust, thermostat)
542
Colin Leroyd20c5072005-05-25 12:31:35 -0700543static DEVICE_ATTR(sensor1_temperature, S_IRUGO,
544 show_sensor1_temperature,NULL);
545static DEVICE_ATTR(sensor2_temperature, S_IRUGO,
546 show_sensor2_temperature,NULL);
547static DEVICE_ATTR(sensor1_limit, S_IRUGO,
548 show_sensor1_limit, NULL);
549static DEVICE_ATTR(sensor2_limit, S_IRUGO,
550 show_sensor2_limit, NULL);
551static DEVICE_ATTR(sensor1_location, S_IRUGO,
552 show_sensor1_location, NULL);
553static DEVICE_ATTR(sensor2_location, S_IRUGO,
554 show_sensor2_location, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
556static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
557 show_specified_fan_speed,store_specified_fan_speed);
558
Colin Leroyd20c5072005-05-25 12:31:35 -0700559static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO,
560 show_sensor1_fan_speed, NULL);
561static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO,
562 show_sensor2_fan_speed, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
564static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
565 show_limit_adjust, store_limit_adjust);
566
567
568static int __init
569thermostat_init(void)
570{
571 struct device_node* np;
Jeremy Kerr018a3d12006-07-12 15:40:29 +1000572 const u32 *prop;
Colin Leroyd20c5072005-05-25 12:31:35 -0700573 int i = 0, offset = 0;
Nicolas Palix44ea9c82009-01-06 14:41:35 -0800574
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 np = of_find_node_by_name(NULL, "fan");
576 if (!np)
577 return -ENODEV;
Stephen Rothwell55b61fe2007-05-03 17:26:52 +1000578 if (of_device_is_compatible(np, "adt7460"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 therm_type = ADT7460;
Stephen Rothwell55b61fe2007-05-03 17:26:52 +1000580 else if (of_device_is_compatible(np, "adt7467"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 therm_type = ADT7467;
Julia Lawall958a65f2008-06-09 22:21:51 +1000582 else {
583 of_node_put(np);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 return -ENODEV;
Julia Lawall958a65f2008-06-09 22:21:51 +1000585 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
Stephen Rothwell01b27262007-04-27 13:41:15 +1000587 prop = of_get_property(np, "hwsensor-params-version", NULL);
Colin Leroya8bacec2005-05-25 12:31:34 -0700588 printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop,
589 (*prop == 1)?"":"un");
Julia Lawall958a65f2008-06-09 22:21:51 +1000590 if (*prop != 1) {
591 of_node_put(np);
Colin Leroya8bacec2005-05-25 12:31:34 -0700592 return -ENODEV;
Julia Lawall958a65f2008-06-09 22:21:51 +1000593 }
Colin Leroya8bacec2005-05-25 12:31:34 -0700594
Stephen Rothwell01b27262007-04-27 13:41:15 +1000595 prop = of_get_property(np, "reg", NULL);
Julia Lawall958a65f2008-06-09 22:21:51 +1000596 if (!prop) {
597 of_node_put(np);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 return -ENODEV;
Julia Lawall958a65f2008-06-09 22:21:51 +1000599 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
601 /* look for bus either by path or using "reg" */
602 if (strstr(np->full_name, "/i2c-bus@") != NULL) {
603 const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9);
604 therm_bus = tmp_bus[0]-'0';
605 } else {
606 therm_bus = ((*prop) >> 8) & 0x0f;
607 }
608
609 therm_address = ((*prop) & 0xff) >> 1;
610
611 printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, "
612 "limit_adjust: %d, fan_speed: %d\n",
613 therm_bus, therm_address, limit_adjust, fan_speed);
614
Stephen Rothwell01b27262007-04-27 13:41:15 +1000615 if (of_get_property(np, "hwsensor-location", NULL)) {
Colin Leroyd20c5072005-05-25 12:31:35 -0700616 for (i = 0; i < 3; i++) {
Stephen Rothwell01b27262007-04-27 13:41:15 +1000617 sensor_location[i] = of_get_property(np,
Colin Leroyd20c5072005-05-25 12:31:35 -0700618 "hwsensor-location", NULL) + offset;
619
620 if (sensor_location[i] == NULL)
621 sensor_location[i] = "";
622
623 printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]);
624 offset += strlen(sensor_location[i]) + 1;
625 }
626 } else {
627 sensor_location[0] = "?";
628 sensor_location[1] = "?";
629 sensor_location[2] = "?";
630 }
631
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700632 of_dev = of_platform_device_create(np, "temperatures", NULL);
Nicolas Palix44ea9c82009-01-06 14:41:35 -0800633 of_node_put(np);
634
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 if (of_dev == NULL) {
636 printk(KERN_ERR "Can't register temperatures device !\n");
637 return -ENODEV;
638 }
Nicolas Palix44ea9c82009-01-06 14:41:35 -0800639
Jean Delvare33a470f2010-01-31 04:00:30 +0000640#ifndef CONFIG_I2C_POWERMAC
641 request_module("i2c-powermac");
642#endif
643
644 return i2c_add_driver(&thermostat_driver);
645}
646
647static void thermostat_create_files(void)
648{
649 int err;
650
Stephen Rothwell10804f02008-01-03 15:17:12 +1100651 err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature);
652 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature);
653 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit);
654 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_limit);
655 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_location);
656 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_location);
657 err |= device_create_file(&of_dev->dev, &dev_attr_limit_adjust);
658 err |= device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed);
659 err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 if(therm_type == ADT7460)
Stephen Rothwell10804f02008-01-03 15:17:12 +1100661 err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed);
662 if (err)
663 printk(KERN_WARNING
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300664 "Failed to create temperature attribute file(s).\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665}
666
Jean Delvare33a470f2010-01-31 04:00:30 +0000667static void thermostat_remove_files(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668{
669 if (of_dev) {
Colin Leroyd20c5072005-05-25 12:31:35 -0700670 device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature);
671 device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature);
672 device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit);
673 device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit);
674 device_remove_file(&of_dev->dev, &dev_attr_sensor1_location);
675 device_remove_file(&of_dev->dev, &dev_attr_sensor2_location);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 device_remove_file(&of_dev->dev, &dev_attr_limit_adjust);
677 device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed);
Colin Leroyd20c5072005-05-25 12:31:35 -0700678 device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
680 if(therm_type == ADT7460)
681 device_remove_file(&of_dev->dev,
Colin Leroyd20c5072005-05-25 12:31:35 -0700682 &dev_attr_sensor2_fan_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 }
Jean Delvare33a470f2010-01-31 04:00:30 +0000685}
686
687static void __exit
688thermostat_exit(void)
689{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 i2c_del_driver(&thermostat_driver);
Jean Delvare33a470f2010-01-31 04:00:30 +0000691 of_device_unregister(of_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692}
693
694module_init(thermostat_init);
695module_exit(thermostat_exit);