Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 | * |
| 6 | * Documentation from |
| 7 | * http://www.analog.com/UploadedFiles/Data_Sheets/115254175ADT7467_pra.pdf |
| 8 | * http://www.analog.com/UploadedFiles/Data_Sheets/3686221171167ADT7460_b.pdf |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/i2c.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/spinlock.h> |
| 23 | #include <linux/smp_lock.h> |
| 24 | #include <linux/wait.h> |
| 25 | #include <linux/suspend.h> |
| 26 | #include <linux/kthread.h> |
| 27 | #include <linux/moduleparam.h> |
| 28 | |
| 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> |
| 34 | #include <asm/of_device.h> |
| 35 | |
| 36 | #undef DEBUG |
| 37 | |
| 38 | #define CONFIG_REG 0x40 |
| 39 | #define MANUAL_MASK 0xe0 |
| 40 | #define AUTO_MASK 0x20 |
| 41 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 42 | static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */ |
| 43 | static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | static u8 MANUAL_MODE[2] = {0x5c, 0x5d}; |
| 45 | static u8 REM_CONTROL[2] = {0x00, 0x40}; |
| 46 | static u8 FAN_SPEED[2] = {0x28, 0x2a}; |
| 47 | static u8 FAN_SPD_SET[2] = {0x30, 0x31}; |
| 48 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 49 | static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */ |
| 50 | static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */ |
| 51 | static char *sensor_location[3] = {NULL, NULL, NULL}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | static int limit_adjust = 0; |
| 54 | static int fan_speed = -1; |
| 55 | |
| 56 | MODULE_AUTHOR("Colin Leroy <colin@colino.net>"); |
| 57 | MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and " |
| 58 | "Powerbook G4 Alu"); |
| 59 | MODULE_LICENSE("GPL"); |
| 60 | |
| 61 | module_param(limit_adjust, int, 0644); |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 62 | MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | "by N degrees."); |
| 64 | |
| 65 | module_param(fan_speed, int, 0644); |
| 66 | MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) " |
| 67 | "(default 64)"); |
| 68 | |
| 69 | struct thermostat { |
| 70 | struct i2c_client clt; |
| 71 | u8 temps[3]; |
| 72 | u8 cached_temp[3]; |
| 73 | u8 initial_limits[3]; |
| 74 | u8 limits[3]; |
| 75 | int last_speed[2]; |
| 76 | int last_var[2]; |
| 77 | }; |
| 78 | |
| 79 | static enum {ADT7460, ADT7467} therm_type; |
| 80 | static int therm_bus, therm_address; |
| 81 | static struct of_device * of_dev; |
| 82 | static struct thermostat* thermostat; |
| 83 | static struct task_struct *thread_therm = NULL; |
| 84 | |
| 85 | static int attach_one_thermostat(struct i2c_adapter *adapter, int addr, |
| 86 | int busno); |
| 87 | |
| 88 | static void write_both_fan_speed(struct thermostat *th, int speed); |
| 89 | static void write_fan_speed(struct thermostat *th, int speed, int fan); |
| 90 | |
| 91 | static int |
| 92 | write_reg(struct thermostat* th, int reg, u8 data) |
| 93 | { |
| 94 | u8 tmp[2]; |
| 95 | int rc; |
| 96 | |
| 97 | tmp[0] = reg; |
| 98 | tmp[1] = data; |
| 99 | rc = i2c_master_send(&th->clt, (const char *)tmp, 2); |
| 100 | if (rc < 0) |
| 101 | return rc; |
| 102 | if (rc != 2) |
| 103 | return -ENODEV; |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static int |
| 108 | read_reg(struct thermostat* th, int reg) |
| 109 | { |
| 110 | u8 reg_addr, data; |
| 111 | int rc; |
| 112 | |
| 113 | reg_addr = (u8)reg; |
| 114 | rc = i2c_master_send(&th->clt, ®_addr, 1); |
| 115 | if (rc < 0) |
| 116 | return rc; |
| 117 | if (rc != 1) |
| 118 | return -ENODEV; |
| 119 | rc = i2c_master_recv(&th->clt, (char *)&data, 1); |
| 120 | if (rc < 0) |
| 121 | return rc; |
| 122 | return data; |
| 123 | } |
| 124 | |
| 125 | static int |
| 126 | attach_thermostat(struct i2c_adapter *adapter) |
| 127 | { |
| 128 | unsigned long bus_no; |
| 129 | |
| 130 | if (strncmp(adapter->name, "uni-n", 5)) |
| 131 | return -ENODEV; |
| 132 | bus_no = simple_strtoul(adapter->name + 6, NULL, 10); |
| 133 | if (bus_no != therm_bus) |
| 134 | return -ENODEV; |
| 135 | return attach_one_thermostat(adapter, therm_address, bus_no); |
| 136 | } |
| 137 | |
| 138 | static int |
| 139 | detach_thermostat(struct i2c_adapter *adapter) |
| 140 | { |
| 141 | struct thermostat* th; |
| 142 | int i; |
| 143 | |
| 144 | if (thermostat == NULL) |
| 145 | return 0; |
| 146 | |
| 147 | th = thermostat; |
| 148 | |
| 149 | if (thread_therm != NULL) { |
| 150 | kthread_stop(thread_therm); |
| 151 | } |
| 152 | |
| 153 | printk(KERN_INFO "adt746x: Putting max temperatures back from " |
| 154 | "%d, %d, %d to %d, %d, %d\n", |
| 155 | th->limits[0], th->limits[1], th->limits[2], |
| 156 | th->initial_limits[0], th->initial_limits[1], |
| 157 | th->initial_limits[2]); |
| 158 | |
| 159 | for (i = 0; i < 3; i++) |
| 160 | write_reg(th, LIMIT_REG[i], th->initial_limits[i]); |
| 161 | |
| 162 | write_both_fan_speed(th, -1); |
| 163 | |
| 164 | i2c_detach_client(&th->clt); |
| 165 | |
| 166 | thermostat = NULL; |
| 167 | |
| 168 | kfree(th); |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static struct i2c_driver thermostat_driver = { |
| 174 | .owner = THIS_MODULE, |
| 175 | .name = "therm_adt746x", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | .attach_adapter = attach_thermostat, |
| 177 | .detach_adapter = detach_thermostat, |
| 178 | }; |
| 179 | |
| 180 | static int read_fan_speed(struct thermostat *th, u8 addr) |
| 181 | { |
| 182 | u8 tmp[2]; |
| 183 | u16 res; |
| 184 | |
| 185 | /* should start with low byte */ |
| 186 | tmp[1] = read_reg(th, addr); |
| 187 | tmp[0] = read_reg(th, addr + 1); |
| 188 | |
| 189 | res = tmp[1] + (tmp[0] << 8); |
| 190 | /* "a value of 0xffff means that the fan has stopped" */ |
| 191 | return (res == 0xffff ? 0 : (90000*60)/res); |
| 192 | } |
| 193 | |
| 194 | static void write_both_fan_speed(struct thermostat *th, int speed) |
| 195 | { |
| 196 | write_fan_speed(th, speed, 0); |
| 197 | if (therm_type == ADT7460) |
| 198 | write_fan_speed(th, speed, 1); |
| 199 | } |
| 200 | |
| 201 | static void write_fan_speed(struct thermostat *th, int speed, int fan) |
| 202 | { |
| 203 | u8 manual; |
| 204 | |
| 205 | if (speed > 0xff) |
| 206 | speed = 0xff; |
| 207 | else if (speed < -1) |
| 208 | speed = 0; |
| 209 | |
| 210 | if (therm_type == ADT7467 && fan == 1) |
| 211 | return; |
| 212 | |
| 213 | if (th->last_speed[fan] != speed) { |
| 214 | if (speed == -1) |
| 215 | printk(KERN_DEBUG "adt746x: Setting speed to automatic " |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 216 | "for %s fan.\n", sensor_location[fan+1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | else |
| 218 | printk(KERN_DEBUG "adt746x: Setting speed to %d " |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 219 | "for %s fan.\n", speed, sensor_location[fan+1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } else |
| 221 | return; |
| 222 | |
| 223 | if (speed >= 0) { |
| 224 | manual = read_reg(th, MANUAL_MODE[fan]); |
| 225 | write_reg(th, MANUAL_MODE[fan], manual|MANUAL_MASK); |
| 226 | write_reg(th, FAN_SPD_SET[fan], speed); |
| 227 | } else { |
| 228 | /* back to automatic */ |
| 229 | if(therm_type == ADT7460) { |
| 230 | manual = read_reg(th, |
| 231 | MANUAL_MODE[fan]) & (~MANUAL_MASK); |
| 232 | |
| 233 | write_reg(th, |
| 234 | MANUAL_MODE[fan], manual|REM_CONTROL[fan]); |
| 235 | } else { |
| 236 | manual = read_reg(th, MANUAL_MODE[fan]); |
| 237 | write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK)); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | th->last_speed[fan] = speed; |
| 242 | } |
| 243 | |
| 244 | static void read_sensors(struct thermostat *th) |
| 245 | { |
| 246 | int i = 0; |
| 247 | |
| 248 | for (i = 0; i < 3; i++) |
| 249 | th->temps[i] = read_reg(th, TEMP_REG[i]); |
| 250 | } |
| 251 | |
| 252 | #ifdef DEBUG |
| 253 | static void display_stats(struct thermostat *th) |
| 254 | { |
| 255 | if (th->temps[0] != th->cached_temp[0] |
| 256 | || th->temps[1] != th->cached_temp[1] |
| 257 | || th->temps[2] != th->cached_temp[2]) { |
| 258 | printk(KERN_INFO "adt746x: Temperature infos:" |
| 259 | " thermostats: %d,%d,%d;" |
| 260 | " limits: %d,%d,%d;" |
| 261 | " fan speed: %d RPM\n", |
| 262 | th->temps[0], th->temps[1], th->temps[2], |
| 263 | th->limits[0], th->limits[1], th->limits[2], |
| 264 | read_fan_speed(th, FAN_SPEED[0])); |
| 265 | } |
| 266 | th->cached_temp[0] = th->temps[0]; |
| 267 | th->cached_temp[1] = th->temps[1]; |
| 268 | th->cached_temp[2] = th->temps[2]; |
| 269 | } |
| 270 | #endif |
| 271 | |
| 272 | static void update_fans_speed (struct thermostat *th) |
| 273 | { |
| 274 | int lastvar = 0; /* last variation, for iBook */ |
| 275 | int i = 0; |
| 276 | |
| 277 | /* we don't care about local sensor, so we start at sensor 1 */ |
| 278 | for (i = 1; i < 3; i++) { |
| 279 | int started = 0; |
| 280 | int fan_number = (therm_type == ADT7460 && i == 2); |
| 281 | int var = th->temps[i] - th->limits[i]; |
| 282 | |
| 283 | if (var > -1) { |
| 284 | int step = (255 - fan_speed) / 7; |
| 285 | int new_speed = 0; |
| 286 | |
| 287 | /* hysteresis : change fan speed only if variation is |
| 288 | * more than two degrees */ |
| 289 | if (abs(var - th->last_var[fan_number]) < 2) |
| 290 | continue; |
| 291 | |
| 292 | started = 1; |
| 293 | new_speed = fan_speed + ((var-1)*step); |
| 294 | |
| 295 | if (new_speed < fan_speed) |
| 296 | new_speed = fan_speed; |
| 297 | if (new_speed > 255) |
| 298 | new_speed = 255; |
| 299 | |
| 300 | printk(KERN_DEBUG "adt746x: setting fans speed to %d " |
| 301 | "(limit exceeded by %d on %s) \n", |
| 302 | new_speed, var, |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 303 | sensor_location[fan_number+1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | write_both_fan_speed(th, new_speed); |
| 305 | th->last_var[fan_number] = var; |
| 306 | } else if (var < -2) { |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 307 | /* don't stop fan if sensor2 is cold and sensor1 is not |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | * so cold (lastvar >= -1) */ |
| 309 | if (i == 2 && lastvar < -1) { |
| 310 | if (th->last_speed[fan_number] != 0) |
| 311 | printk(KERN_DEBUG "adt746x: Stopping " |
| 312 | "fans.\n"); |
| 313 | write_both_fan_speed(th, 0); |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | lastvar = var; |
| 318 | |
| 319 | if (started) |
| 320 | return; /* we don't want to re-stop the fan |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 321 | * if sensor1 is heating and sensor2 is not */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | } |
| 323 | } |
| 324 | |
| 325 | static int monitor_task(void *arg) |
| 326 | { |
| 327 | struct thermostat* th = arg; |
| 328 | |
| 329 | while(!kthread_should_stop()) { |
Christoph Lameter | 3e1d1d2 | 2005-06-24 23:13:50 -0700 | [diff] [blame] | 330 | try_to_freeze(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | msleep_interruptible(2000); |
| 332 | |
| 333 | #ifndef DEBUG |
| 334 | if (fan_speed != -1) |
| 335 | read_sensors(th); |
| 336 | #else |
| 337 | read_sensors(th); |
| 338 | #endif |
| 339 | |
| 340 | if (fan_speed != -1) |
| 341 | update_fans_speed(th); |
| 342 | |
| 343 | #ifdef DEBUG |
| 344 | display_stats(th); |
| 345 | #endif |
| 346 | |
| 347 | } |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static void set_limit(struct thermostat *th, int i) |
| 353 | { |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 354 | /* Set sensor1 limit higher to avoid powerdowns */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | th->limits[i] = default_limits_chip[i] + limit_adjust; |
| 356 | write_reg(th, LIMIT_REG[i], th->limits[i]); |
| 357 | |
| 358 | /* set our limits to normal */ |
| 359 | th->limits[i] = default_limits_local[i] + limit_adjust; |
| 360 | } |
| 361 | |
| 362 | static int attach_one_thermostat(struct i2c_adapter *adapter, int addr, |
| 363 | int busno) |
| 364 | { |
| 365 | struct thermostat* th; |
| 366 | int rc; |
| 367 | int i; |
| 368 | |
| 369 | if (thermostat) |
| 370 | return 0; |
| 371 | |
| 372 | th = (struct thermostat *) |
| 373 | kmalloc(sizeof(struct thermostat), GFP_KERNEL); |
| 374 | |
| 375 | if (!th) |
| 376 | return -ENOMEM; |
| 377 | |
| 378 | memset(th, 0, sizeof(*th)); |
| 379 | th->clt.addr = addr; |
| 380 | th->clt.adapter = adapter; |
| 381 | th->clt.driver = &thermostat_driver; |
| 382 | strcpy(th->clt.name, "thermostat"); |
| 383 | |
| 384 | rc = read_reg(th, 0); |
| 385 | if (rc < 0) { |
| 386 | printk(KERN_ERR "adt746x: Thermostat failed to read config " |
| 387 | "from bus %d !\n", |
| 388 | busno); |
| 389 | kfree(th); |
| 390 | return -ENODEV; |
| 391 | } |
| 392 | |
| 393 | /* force manual control to start the fan quieter */ |
| 394 | if (fan_speed == -1) |
| 395 | fan_speed = 64; |
| 396 | |
| 397 | if(therm_type == ADT7460) { |
| 398 | printk(KERN_INFO "adt746x: ADT7460 initializing\n"); |
| 399 | /* The 7460 needs to be started explicitly */ |
| 400 | write_reg(th, CONFIG_REG, 1); |
| 401 | } else |
| 402 | printk(KERN_INFO "adt746x: ADT7467 initializing\n"); |
| 403 | |
| 404 | for (i = 0; i < 3; i++) { |
| 405 | th->initial_limits[i] = read_reg(th, LIMIT_REG[i]); |
| 406 | set_limit(th, i); |
| 407 | } |
| 408 | |
| 409 | printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d" |
| 410 | " to %d, %d, %d\n", |
| 411 | th->initial_limits[0], th->initial_limits[1], |
| 412 | th->initial_limits[2], th->limits[0], th->limits[1], |
| 413 | th->limits[2]); |
| 414 | |
| 415 | thermostat = th; |
| 416 | |
| 417 | if (i2c_attach_client(&th->clt)) { |
| 418 | printk(KERN_INFO "adt746x: Thermostat failed to attach " |
| 419 | "client !\n"); |
| 420 | thermostat = NULL; |
| 421 | kfree(th); |
| 422 | return -ENODEV; |
| 423 | } |
| 424 | |
| 425 | /* be sure to really write fan speed the first time */ |
| 426 | th->last_speed[0] = -2; |
| 427 | th->last_speed[1] = -2; |
| 428 | th->last_var[0] = -80; |
| 429 | th->last_var[1] = -80; |
| 430 | |
| 431 | if (fan_speed != -1) { |
| 432 | /* manual mode, stop fans */ |
| 433 | write_both_fan_speed(th, 0); |
| 434 | } else { |
| 435 | /* automatic mode */ |
| 436 | write_both_fan_speed(th, -1); |
| 437 | } |
| 438 | |
| 439 | thread_therm = kthread_run(monitor_task, th, "kfand"); |
| 440 | |
| 441 | if (thread_therm == ERR_PTR(-ENOMEM)) { |
| 442 | printk(KERN_INFO "adt746x: Kthread creation failed\n"); |
| 443 | thread_therm = NULL; |
| 444 | return -ENOMEM; |
| 445 | } |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * Now, unfortunately, sysfs doesn't give us a nice void * we could |
| 452 | * pass around to the attribute functions, so we don't really have |
| 453 | * choice but implement a bunch of them... |
| 454 | * |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 455 | * FIXME, it does now... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | */ |
| 457 | #define BUILD_SHOW_FUNC_INT(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 458 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | { \ |
| 460 | return sprintf(buf, "%d\n", data); \ |
| 461 | } |
| 462 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 463 | #define BUILD_SHOW_FUNC_STR(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 464 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 465 | { \ |
| 466 | return sprintf(buf, "%s\n", data); \ |
| 467 | } |
| 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | #define BUILD_SHOW_FUNC_FAN(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 470 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { \ |
| 472 | return sprintf(buf, "%d (%d rpm)\n", \ |
| 473 | thermostat->last_speed[data], \ |
| 474 | read_fan_speed(thermostat, FAN_SPEED[data]) \ |
| 475 | ); \ |
| 476 | } |
| 477 | |
| 478 | #define BUILD_STORE_FUNC_DEG(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 479 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | { \ |
| 481 | int val; \ |
| 482 | int i; \ |
| 483 | val = simple_strtol(buf, NULL, 10); \ |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 484 | printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | limit_adjust = val; \ |
| 486 | for (i=0; i < 3; i++) \ |
| 487 | set_limit(thermostat, i); \ |
| 488 | return n; \ |
| 489 | } |
| 490 | |
| 491 | #define BUILD_STORE_FUNC_INT(name, data) \ |
Yani Ioannou | e404e27 | 2005-05-17 06:42:58 -0400 | [diff] [blame] | 492 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { \ |
| 494 | u32 val; \ |
| 495 | val = simple_strtoul(buf, NULL, 10); \ |
| 496 | if (val < 0 || val > 255) \ |
| 497 | return -EINVAL; \ |
| 498 | printk(KERN_INFO "Setting specified fan speed to %d\n", val); \ |
| 499 | data = val; \ |
| 500 | return n; \ |
| 501 | } |
| 502 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 503 | BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1]))) |
| 504 | BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2]))) |
| 505 | BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1]) |
| 506 | BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2]) |
| 507 | BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1]) |
| 508 | BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
| 510 | BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed) |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 511 | BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0) |
| 512 | BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
| 514 | BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed) |
| 515 | BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust) |
| 516 | BUILD_STORE_FUNC_DEG(limit_adjust, thermostat) |
| 517 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 518 | static DEVICE_ATTR(sensor1_temperature, S_IRUGO, |
| 519 | show_sensor1_temperature,NULL); |
| 520 | static DEVICE_ATTR(sensor2_temperature, S_IRUGO, |
| 521 | show_sensor2_temperature,NULL); |
| 522 | static DEVICE_ATTR(sensor1_limit, S_IRUGO, |
| 523 | show_sensor1_limit, NULL); |
| 524 | static DEVICE_ATTR(sensor2_limit, S_IRUGO, |
| 525 | show_sensor2_limit, NULL); |
| 526 | static DEVICE_ATTR(sensor1_location, S_IRUGO, |
| 527 | show_sensor1_location, NULL); |
| 528 | static DEVICE_ATTR(sensor2_location, S_IRUGO, |
| 529 | show_sensor2_location, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
| 531 | static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
| 532 | show_specified_fan_speed,store_specified_fan_speed); |
| 533 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 534 | static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO, |
| 535 | show_sensor1_fan_speed, NULL); |
| 536 | static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO, |
| 537 | show_sensor2_fan_speed, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
| 539 | static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, |
| 540 | show_limit_adjust, store_limit_adjust); |
| 541 | |
| 542 | |
| 543 | static int __init |
| 544 | thermostat_init(void) |
| 545 | { |
| 546 | struct device_node* np; |
| 547 | u32 *prop; |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 548 | int i = 0, offset = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
| 550 | np = of_find_node_by_name(NULL, "fan"); |
| 551 | if (!np) |
| 552 | return -ENODEV; |
| 553 | if (device_is_compatible(np, "adt7460")) |
| 554 | therm_type = ADT7460; |
| 555 | else if (device_is_compatible(np, "adt7467")) |
| 556 | therm_type = ADT7467; |
| 557 | else |
| 558 | return -ENODEV; |
| 559 | |
Colin Leroy | a8bacec | 2005-05-25 12:31:34 -0700 | [diff] [blame] | 560 | prop = (u32 *)get_property(np, "hwsensor-params-version", NULL); |
| 561 | printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop, |
| 562 | (*prop == 1)?"":"un"); |
| 563 | if (*prop != 1) |
| 564 | return -ENODEV; |
| 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | prop = (u32 *)get_property(np, "reg", NULL); |
| 567 | if (!prop) |
| 568 | return -ENODEV; |
| 569 | |
| 570 | /* look for bus either by path or using "reg" */ |
| 571 | if (strstr(np->full_name, "/i2c-bus@") != NULL) { |
| 572 | const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9); |
| 573 | therm_bus = tmp_bus[0]-'0'; |
| 574 | } else { |
| 575 | therm_bus = ((*prop) >> 8) & 0x0f; |
| 576 | } |
| 577 | |
| 578 | therm_address = ((*prop) & 0xff) >> 1; |
| 579 | |
| 580 | printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, " |
| 581 | "limit_adjust: %d, fan_speed: %d\n", |
| 582 | therm_bus, therm_address, limit_adjust, fan_speed); |
| 583 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 584 | if (get_property(np, "hwsensor-location", NULL)) { |
| 585 | for (i = 0; i < 3; i++) { |
| 586 | sensor_location[i] = get_property(np, |
| 587 | "hwsensor-location", NULL) + offset; |
| 588 | |
| 589 | if (sensor_location[i] == NULL) |
| 590 | sensor_location[i] = ""; |
| 591 | |
| 592 | printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]); |
| 593 | offset += strlen(sensor_location[i]) + 1; |
| 594 | } |
| 595 | } else { |
| 596 | sensor_location[0] = "?"; |
| 597 | sensor_location[1] = "?"; |
| 598 | sensor_location[2] = "?"; |
| 599 | } |
| 600 | |
Benjamin Herrenschmidt | 0365ba7 | 2005-09-22 21:44:06 -0700 | [diff] [blame] | 601 | of_dev = of_platform_device_create(np, "temperatures", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
| 603 | if (of_dev == NULL) { |
| 604 | printk(KERN_ERR "Can't register temperatures device !\n"); |
| 605 | return -ENODEV; |
| 606 | } |
| 607 | |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 608 | device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
| 609 | device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
| 610 | device_create_file(&of_dev->dev, &dev_attr_sensor1_limit); |
| 611 | device_create_file(&of_dev->dev, &dev_attr_sensor2_limit); |
| 612 | device_create_file(&of_dev->dev, &dev_attr_sensor1_location); |
| 613 | device_create_file(&of_dev->dev, &dev_attr_sensor2_location); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | device_create_file(&of_dev->dev, &dev_attr_limit_adjust); |
| 615 | device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 616 | device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | if(therm_type == ADT7460) |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 618 | device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
| 620 | #ifndef CONFIG_I2C_KEYWEST |
| 621 | request_module("i2c-keywest"); |
| 622 | #endif |
| 623 | |
| 624 | return i2c_add_driver(&thermostat_driver); |
| 625 | } |
| 626 | |
| 627 | static void __exit |
| 628 | thermostat_exit(void) |
| 629 | { |
| 630 | if (of_dev) { |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 631 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
| 632 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature); |
| 633 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit); |
| 634 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit); |
| 635 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_location); |
| 636 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_location); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | device_remove_file(&of_dev->dev, &dev_attr_limit_adjust); |
| 638 | device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed); |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 639 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
| 641 | if(therm_type == ADT7460) |
| 642 | device_remove_file(&of_dev->dev, |
Colin Leroy | d20c507 | 2005-05-25 12:31:35 -0700 | [diff] [blame] | 643 | &dev_attr_sensor2_fan_speed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
| 645 | of_device_unregister(of_dev); |
| 646 | } |
| 647 | i2c_del_driver(&thermostat_driver); |
| 648 | } |
| 649 | |
| 650 | module_init(thermostat_init); |
| 651 | module_exit(thermostat_exit); |