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Commit | Line | Data |
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860e1d6b RL |
1 | /* |
2 | * drivers/hwmon/hdaps.c - driver for IBM's Hard Drive Active Protection System | |
3 | * | |
4 | * Copyright (C) 2005 Robert Love <rml@novell.com> | |
5 | * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com> | |
6 | * | |
4c87b74c RL |
7 | * The HardDisk Active Protection System (hdaps) is present in IBM ThinkPads |
8 | * starting with the R40, T41, and X40. It provides a basic two-axis | |
9 | * accelerometer and other data, such as the device's temperature. | |
860e1d6b | 10 | * |
393ad299 | 11 | * This driver is based on the document by Mark A. Smith available at |
860e1d6b RL |
12 | * http://www.almaden.ibm.com/cs/people/marksmith/tpaps.html and a lot of trial |
13 | * and error. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License v2 as published by the | |
17 | * Free Software Foundation. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
20 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
21 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
22 | * more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License along with | |
25 | * this program; if not, write to the Free Software Foundation, Inc., | |
26 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA | |
27 | */ | |
28 | ||
29 | #include <linux/delay.h> | |
d052d1be | 30 | #include <linux/platform_device.h> |
860e1d6b RL |
31 | #include <linux/input.h> |
32 | #include <linux/kernel.h> | |
6acc369a | 33 | #include <linux/mutex.h> |
860e1d6b RL |
34 | #include <linux/module.h> |
35 | #include <linux/timer.h> | |
36 | #include <linux/dmi.h> | |
914e2637 | 37 | #include <linux/jiffies.h> |
6acc369a | 38 | |
860e1d6b RL |
39 | #include <asm/io.h> |
40 | ||
41 | #define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */ | |
393ad299 | 42 | #define HDAPS_NR_PORTS 0x30 /* number of ports: 0x1600 - 0x162f */ |
860e1d6b RL |
43 | |
44 | #define HDAPS_PORT_STATE 0x1611 /* device state */ | |
45 | #define HDAPS_PORT_YPOS 0x1612 /* y-axis position */ | |
46 | #define HDAPS_PORT_XPOS 0x1614 /* x-axis position */ | |
0a704681 | 47 | #define HDAPS_PORT_TEMP1 0x1616 /* device temperature, in Celsius */ |
860e1d6b RL |
48 | #define HDAPS_PORT_YVAR 0x1617 /* y-axis variance (what is this?) */ |
49 | #define HDAPS_PORT_XVAR 0x1619 /* x-axis variance (what is this?) */ | |
50 | #define HDAPS_PORT_TEMP2 0x161b /* device temperature (again?) */ | |
51 | #define HDAPS_PORT_UNKNOWN 0x161c /* what is this? */ | |
52 | #define HDAPS_PORT_KMACT 0x161d /* keyboard or mouse activity */ | |
53 | ||
393ad299 | 54 | #define STATE_FRESH 0x50 /* accelerometer data is fresh */ |
860e1d6b RL |
55 | |
56 | #define KEYBD_MASK 0x20 /* set if keyboard activity */ | |
57 | #define MOUSE_MASK 0x40 /* set if mouse activity */ | |
58 | #define KEYBD_ISSET(n) (!! (n & KEYBD_MASK)) /* keyboard used? */ | |
59 | #define MOUSE_ISSET(n) (!! (n & MOUSE_MASK)) /* mouse used? */ | |
60 | ||
61 | #define INIT_TIMEOUT_MSECS 4000 /* wait up to 4s for device init ... */ | |
62 | #define INIT_WAIT_MSECS 200 /* ... in 200ms increments */ | |
63 | ||
393ad299 RL |
64 | #define HDAPS_POLL_PERIOD (HZ/20) /* poll for input every 1/20s */ |
65 | #define HDAPS_INPUT_FUZZ 4 /* input event threshold */ | |
d12eb7e1 | 66 | #define HDAPS_INPUT_FLAT 4 |
393ad299 | 67 | |
860e1d6b | 68 | static struct timer_list hdaps_timer; |
393ad299 | 69 | static struct platform_device *pdev; |
d12eb7e1 | 70 | static struct input_dev *hdaps_idev; |
860e1d6b RL |
71 | static unsigned int hdaps_invert; |
72 | static u8 km_activity; | |
73 | static int rest_x; | |
74 | static int rest_y; | |
75 | ||
6acc369a | 76 | static DEFINE_MUTEX(hdaps_mtx); |
860e1d6b RL |
77 | |
78 | /* | |
6acc369a | 79 | * __get_latch - Get the value from a given port. Callers must hold hdaps_mtx. |
860e1d6b RL |
80 | */ |
81 | static inline u8 __get_latch(u16 port) | |
82 | { | |
393ad299 | 83 | return inb(port) & 0xff; |
860e1d6b RL |
84 | } |
85 | ||
86 | /* | |
393ad299 | 87 | * __check_latch - Check a port latch for a given value. Returns zero if the |
6acc369a | 88 | * port contains the given value. Callers must hold hdaps_mtx. |
860e1d6b | 89 | */ |
393ad299 | 90 | static inline int __check_latch(u16 port, u8 val) |
860e1d6b RL |
91 | { |
92 | if (__get_latch(port) == val) | |
93 | return 0; | |
94 | return -EINVAL; | |
95 | } | |
96 | ||
97 | /* | |
98 | * __wait_latch - Wait up to 100us for a port latch to get a certain value, | |
6acc369a | 99 | * returning zero if the value is obtained. Callers must hold hdaps_mtx. |
860e1d6b | 100 | */ |
393ad299 | 101 | static int __wait_latch(u16 port, u8 val) |
860e1d6b RL |
102 | { |
103 | unsigned int i; | |
104 | ||
105 | for (i = 0; i < 20; i++) { | |
106 | if (!__check_latch(port, val)) | |
107 | return 0; | |
108 | udelay(5); | |
109 | } | |
110 | ||
393ad299 | 111 | return -EIO; |
860e1d6b RL |
112 | } |
113 | ||
114 | /* | |
393ad299 | 115 | * __device_refresh - request a refresh from the accelerometer. Does not wait |
6acc369a | 116 | * for refresh to complete. Callers must hold hdaps_mtx. |
860e1d6b | 117 | */ |
393ad299 | 118 | static void __device_refresh(void) |
860e1d6b | 119 | { |
393ad299 RL |
120 | udelay(200); |
121 | if (inb(0x1604) != STATE_FRESH) { | |
122 | outb(0x11, 0x1610); | |
123 | outb(0x01, 0x161f); | |
124 | } | |
125 | } | |
860e1d6b | 126 | |
393ad299 RL |
127 | /* |
128 | * __device_refresh_sync - request a synchronous refresh from the | |
129 | * accelerometer. We wait for the refresh to complete. Returns zero if | |
6acc369a | 130 | * successful and nonzero on error. Callers must hold hdaps_mtx. |
393ad299 RL |
131 | */ |
132 | static int __device_refresh_sync(void) | |
133 | { | |
134 | __device_refresh(); | |
860e1d6b RL |
135 | return __wait_latch(0x1604, STATE_FRESH); |
136 | } | |
137 | ||
138 | /* | |
393ad299 | 139 | * __device_complete - indicate to the accelerometer that we are done reading |
6acc369a | 140 | * data, and then initiate an async refresh. Callers must hold hdaps_mtx. |
860e1d6b RL |
141 | */ |
142 | static inline void __device_complete(void) | |
143 | { | |
144 | inb(0x161f); | |
145 | inb(0x1604); | |
393ad299 | 146 | __device_refresh(); |
860e1d6b RL |
147 | } |
148 | ||
149 | /* | |
150 | * hdaps_readb_one - reads a byte from a single I/O port, placing the value in | |
151 | * the given pointer. Returns zero on success or a negative error on failure. | |
152 | * Can sleep. | |
153 | */ | |
154 | static int hdaps_readb_one(unsigned int port, u8 *val) | |
155 | { | |
156 | int ret; | |
157 | ||
6acc369a | 158 | mutex_lock(&hdaps_mtx); |
860e1d6b | 159 | |
393ad299 RL |
160 | /* do a sync refresh -- we need to be sure that we read fresh data */ |
161 | ret = __device_refresh_sync(); | |
162 | if (ret) | |
163 | goto out; | |
164 | ||
165 | *val = inb(port); | |
166 | __device_complete(); | |
167 | ||
168 | out: | |
6acc369a | 169 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
170 | return ret; |
171 | } | |
172 | ||
393ad299 | 173 | /* __hdaps_read_pair - internal lockless helper for hdaps_read_pair(). */ |
860e1d6b RL |
174 | static int __hdaps_read_pair(unsigned int port1, unsigned int port2, |
175 | int *x, int *y) | |
176 | { | |
177 | /* do a sync refresh -- we need to be sure that we read fresh data */ | |
393ad299 | 178 | if (__device_refresh_sync()) |
860e1d6b RL |
179 | return -EIO; |
180 | ||
181 | *y = inw(port2); | |
182 | *x = inw(port1); | |
183 | km_activity = inb(HDAPS_PORT_KMACT); | |
184 | __device_complete(); | |
185 | ||
186 | /* if hdaps_invert is set, negate the two values */ | |
187 | if (hdaps_invert) { | |
188 | *x = -*x; | |
189 | *y = -*y; | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | /* | |
196 | * hdaps_read_pair - reads the values from a pair of ports, placing the values | |
197 | * in the given pointers. Returns zero on success. Can sleep. | |
198 | */ | |
199 | static int hdaps_read_pair(unsigned int port1, unsigned int port2, | |
200 | int *val1, int *val2) | |
201 | { | |
202 | int ret; | |
203 | ||
6acc369a | 204 | mutex_lock(&hdaps_mtx); |
860e1d6b | 205 | ret = __hdaps_read_pair(port1, port2, val1, val2); |
6acc369a | 206 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
207 | |
208 | return ret; | |
209 | } | |
210 | ||
393ad299 RL |
211 | /* |
212 | * hdaps_device_init - initialize the accelerometer. Returns zero on success | |
213 | * and negative error code on failure. Can sleep. | |
214 | */ | |
860e1d6b RL |
215 | static int hdaps_device_init(void) |
216 | { | |
393ad299 | 217 | int total, ret = -ENXIO; |
860e1d6b | 218 | |
6acc369a | 219 | mutex_lock(&hdaps_mtx); |
860e1d6b RL |
220 | |
221 | outb(0x13, 0x1610); | |
222 | outb(0x01, 0x161f); | |
223 | if (__wait_latch(0x161f, 0x00)) | |
224 | goto out; | |
225 | ||
226 | /* | |
393ad299 RL |
227 | * Most ThinkPads return 0x01. |
228 | * | |
229 | * Others--namely the R50p, T41p, and T42p--return 0x03. These laptops | |
230 | * have "inverted" axises. | |
860e1d6b RL |
231 | * |
232 | * The 0x02 value occurs when the chip has been previously initialized. | |
233 | */ | |
234 | if (__check_latch(0x1611, 0x03) && | |
235 | __check_latch(0x1611, 0x02) && | |
236 | __check_latch(0x1611, 0x01)) | |
237 | goto out; | |
238 | ||
239 | printk(KERN_DEBUG "hdaps: initial latch check good (0x%02x).\n", | |
240 | __get_latch(0x1611)); | |
241 | ||
242 | outb(0x17, 0x1610); | |
243 | outb(0x81, 0x1611); | |
244 | outb(0x01, 0x161f); | |
245 | if (__wait_latch(0x161f, 0x00)) | |
246 | goto out; | |
247 | if (__wait_latch(0x1611, 0x00)) | |
248 | goto out; | |
249 | if (__wait_latch(0x1612, 0x60)) | |
250 | goto out; | |
251 | if (__wait_latch(0x1613, 0x00)) | |
252 | goto out; | |
253 | outb(0x14, 0x1610); | |
254 | outb(0x01, 0x1611); | |
255 | outb(0x01, 0x161f); | |
256 | if (__wait_latch(0x161f, 0x00)) | |
257 | goto out; | |
258 | outb(0x10, 0x1610); | |
259 | outb(0xc8, 0x1611); | |
260 | outb(0x00, 0x1612); | |
261 | outb(0x02, 0x1613); | |
262 | outb(0x01, 0x161f); | |
263 | if (__wait_latch(0x161f, 0x00)) | |
264 | goto out; | |
393ad299 | 265 | if (__device_refresh_sync()) |
860e1d6b RL |
266 | goto out; |
267 | if (__wait_latch(0x1611, 0x00)) | |
268 | goto out; | |
269 | ||
270 | /* we have done our dance, now let's wait for the applause */ | |
393ad299 RL |
271 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
272 | int x, y; | |
860e1d6b RL |
273 | |
274 | /* a read of the device helps push it into action */ | |
393ad299 | 275 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); |
860e1d6b RL |
276 | if (!__wait_latch(0x1611, 0x02)) { |
277 | ret = 0; | |
278 | break; | |
279 | } | |
280 | ||
281 | msleep(INIT_WAIT_MSECS); | |
860e1d6b RL |
282 | } |
283 | ||
284 | out: | |
6acc369a | 285 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
286 | return ret; |
287 | } | |
288 | ||
289 | ||
860e1d6b RL |
290 | /* Device model stuff */ |
291 | ||
3ae5eaec | 292 | static int hdaps_probe(struct platform_device *dev) |
860e1d6b RL |
293 | { |
294 | int ret; | |
295 | ||
296 | ret = hdaps_device_init(); | |
297 | if (ret) | |
298 | return ret; | |
299 | ||
300 | printk(KERN_INFO "hdaps: device successfully initialized.\n"); | |
301 | return 0; | |
302 | } | |
303 | ||
3ae5eaec | 304 | static int hdaps_resume(struct platform_device *dev) |
860e1d6b | 305 | { |
9480e307 | 306 | return hdaps_device_init(); |
860e1d6b RL |
307 | } |
308 | ||
3ae5eaec | 309 | static struct platform_driver hdaps_driver = { |
860e1d6b | 310 | .probe = hdaps_probe, |
3ae5eaec RK |
311 | .resume = hdaps_resume, |
312 | .driver = { | |
313 | .name = "hdaps", | |
314 | .owner = THIS_MODULE, | |
315 | }, | |
860e1d6b RL |
316 | }; |
317 | ||
393ad299 | 318 | /* |
6acc369a | 319 | * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_mtx. |
393ad299 RL |
320 | */ |
321 | static void hdaps_calibrate(void) | |
322 | { | |
323 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &rest_x, &rest_y); | |
324 | } | |
325 | ||
326 | static void hdaps_mousedev_poll(unsigned long unused) | |
327 | { | |
328 | int x, y; | |
329 | ||
330 | /* Cannot sleep. Try nonblockingly. If we fail, try again later. */ | |
6acc369a | 331 | if (mutex_trylock(&hdaps_mtx)) { |
393ad299 RL |
332 | mod_timer(&hdaps_timer,jiffies + HDAPS_POLL_PERIOD); |
333 | return; | |
334 | } | |
335 | ||
336 | if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y)) | |
337 | goto out; | |
338 | ||
d12eb7e1 DT |
339 | input_report_abs(hdaps_idev, ABS_X, x - rest_x); |
340 | input_report_abs(hdaps_idev, ABS_Y, y - rest_y); | |
341 | input_sync(hdaps_idev); | |
393ad299 RL |
342 | |
343 | mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD); | |
344 | ||
345 | out: | |
6acc369a | 346 | mutex_unlock(&hdaps_mtx); |
393ad299 RL |
347 | } |
348 | ||
860e1d6b RL |
349 | |
350 | /* Sysfs Files */ | |
351 | ||
352 | static ssize_t hdaps_position_show(struct device *dev, | |
353 | struct device_attribute *attr, char *buf) | |
354 | { | |
355 | int ret, x, y; | |
356 | ||
357 | ret = hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); | |
358 | if (ret) | |
359 | return ret; | |
360 | ||
361 | return sprintf(buf, "(%d,%d)\n", x, y); | |
362 | } | |
363 | ||
364 | static ssize_t hdaps_variance_show(struct device *dev, | |
365 | struct device_attribute *attr, char *buf) | |
366 | { | |
367 | int ret, x, y; | |
368 | ||
369 | ret = hdaps_read_pair(HDAPS_PORT_XVAR, HDAPS_PORT_YVAR, &x, &y); | |
370 | if (ret) | |
371 | return ret; | |
372 | ||
373 | return sprintf(buf, "(%d,%d)\n", x, y); | |
374 | } | |
375 | ||
376 | static ssize_t hdaps_temp1_show(struct device *dev, | |
377 | struct device_attribute *attr, char *buf) | |
378 | { | |
379 | u8 temp; | |
380 | int ret; | |
381 | ||
382 | ret = hdaps_readb_one(HDAPS_PORT_TEMP1, &temp); | |
383 | if (ret < 0) | |
384 | return ret; | |
385 | ||
386 | return sprintf(buf, "%u\n", temp); | |
387 | } | |
388 | ||
389 | static ssize_t hdaps_temp2_show(struct device *dev, | |
390 | struct device_attribute *attr, char *buf) | |
391 | { | |
392 | u8 temp; | |
393 | int ret; | |
394 | ||
395 | ret = hdaps_readb_one(HDAPS_PORT_TEMP2, &temp); | |
396 | if (ret < 0) | |
397 | return ret; | |
398 | ||
399 | return sprintf(buf, "%u\n", temp); | |
400 | } | |
401 | ||
402 | static ssize_t hdaps_keyboard_activity_show(struct device *dev, | |
403 | struct device_attribute *attr, | |
404 | char *buf) | |
405 | { | |
406 | return sprintf(buf, "%u\n", KEYBD_ISSET(km_activity)); | |
407 | } | |
408 | ||
409 | static ssize_t hdaps_mouse_activity_show(struct device *dev, | |
410 | struct device_attribute *attr, | |
411 | char *buf) | |
412 | { | |
413 | return sprintf(buf, "%u\n", MOUSE_ISSET(km_activity)); | |
414 | } | |
415 | ||
416 | static ssize_t hdaps_calibrate_show(struct device *dev, | |
417 | struct device_attribute *attr, char *buf) | |
418 | { | |
419 | return sprintf(buf, "(%d,%d)\n", rest_x, rest_y); | |
420 | } | |
421 | ||
422 | static ssize_t hdaps_calibrate_store(struct device *dev, | |
423 | struct device_attribute *attr, | |
424 | const char *buf, size_t count) | |
425 | { | |
6acc369a | 426 | mutex_lock(&hdaps_mtx); |
860e1d6b | 427 | hdaps_calibrate(); |
6acc369a | 428 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
429 | |
430 | return count; | |
431 | } | |
432 | ||
433 | static ssize_t hdaps_invert_show(struct device *dev, | |
434 | struct device_attribute *attr, char *buf) | |
435 | { | |
436 | return sprintf(buf, "%u\n", hdaps_invert); | |
437 | } | |
438 | ||
439 | static ssize_t hdaps_invert_store(struct device *dev, | |
440 | struct device_attribute *attr, | |
441 | const char *buf, size_t count) | |
442 | { | |
443 | int invert; | |
444 | ||
445 | if (sscanf(buf, "%d", &invert) != 1 || (invert != 1 && invert != 0)) | |
446 | return -EINVAL; | |
447 | ||
448 | hdaps_invert = invert; | |
449 | hdaps_calibrate(); | |
450 | ||
451 | return count; | |
452 | } | |
453 | ||
860e1d6b RL |
454 | static DEVICE_ATTR(position, 0444, hdaps_position_show, NULL); |
455 | static DEVICE_ATTR(variance, 0444, hdaps_variance_show, NULL); | |
456 | static DEVICE_ATTR(temp1, 0444, hdaps_temp1_show, NULL); | |
457 | static DEVICE_ATTR(temp2, 0444, hdaps_temp2_show, NULL); | |
458 | static DEVICE_ATTR(keyboard_activity, 0444, hdaps_keyboard_activity_show, NULL); | |
459 | static DEVICE_ATTR(mouse_activity, 0444, hdaps_mouse_activity_show, NULL); | |
460 | static DEVICE_ATTR(calibrate, 0644, hdaps_calibrate_show,hdaps_calibrate_store); | |
461 | static DEVICE_ATTR(invert, 0644, hdaps_invert_show, hdaps_invert_store); | |
860e1d6b RL |
462 | |
463 | static struct attribute *hdaps_attributes[] = { | |
464 | &dev_attr_position.attr, | |
465 | &dev_attr_variance.attr, | |
466 | &dev_attr_temp1.attr, | |
467 | &dev_attr_temp2.attr, | |
468 | &dev_attr_keyboard_activity.attr, | |
469 | &dev_attr_mouse_activity.attr, | |
470 | &dev_attr_calibrate.attr, | |
860e1d6b RL |
471 | &dev_attr_invert.attr, |
472 | NULL, | |
473 | }; | |
474 | ||
475 | static struct attribute_group hdaps_attribute_group = { | |
476 | .attrs = hdaps_attributes, | |
477 | }; | |
478 | ||
479 | ||
480 | /* Module stuff */ | |
481 | ||
4c87b74c | 482 | /* hdaps_dmi_match - found a match. return one, short-circuiting the hunt. */ |
509a5e85 | 483 | static int __init hdaps_dmi_match(struct dmi_system_id *id) |
860e1d6b RL |
484 | { |
485 | printk(KERN_INFO "hdaps: %s detected.\n", id->ident); | |
4c87b74c | 486 | return 1; |
860e1d6b RL |
487 | } |
488 | ||
4c87b74c | 489 | /* hdaps_dmi_match_invert - found an inverted match. */ |
509a5e85 | 490 | static int __init hdaps_dmi_match_invert(struct dmi_system_id *id) |
860e1d6b RL |
491 | { |
492 | hdaps_invert = 1; | |
493 | printk(KERN_INFO "hdaps: inverting axis readings.\n"); | |
4c87b74c | 494 | return hdaps_dmi_match(id); |
860e1d6b RL |
495 | } |
496 | ||
509a5e85 JD |
497 | #define HDAPS_DMI_MATCH_NORMAL(vendor, model) { \ |
498 | .ident = vendor " " model, \ | |
860e1d6b RL |
499 | .callback = hdaps_dmi_match, \ |
500 | .matches = { \ | |
509a5e85 | 501 | DMI_MATCH(DMI_BOARD_VENDOR, vendor), \ |
860e1d6b RL |
502 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ |
503 | } \ | |
504 | } | |
505 | ||
509a5e85 JD |
506 | #define HDAPS_DMI_MATCH_INVERT(vendor, model) { \ |
507 | .ident = vendor " " model, \ | |
860e1d6b RL |
508 | .callback = hdaps_dmi_match_invert, \ |
509 | .matches = { \ | |
509a5e85 | 510 | DMI_MATCH(DMI_BOARD_VENDOR, vendor), \ |
860e1d6b RL |
511 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ |
512 | } \ | |
513 | } | |
514 | ||
509a5e85 | 515 | /* Note that HDAPS_DMI_MATCH_NORMAL("ThinkPad T42") would match |
0f23e50a SB |
516 | "ThinkPad T42p", so the order of the entries matters. |
517 | If your ThinkPad is not recognized, please update to latest | |
518 | BIOS. This is especially the case for some R52 ThinkPads. */ | |
509a5e85 | 519 | static struct dmi_system_id __initdata hdaps_whitelist[] = { |
509a5e85 JD |
520 | HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad R50p"), |
521 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R50"), | |
522 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R51"), | |
523 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R52"), | |
509a5e85 JD |
524 | HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T41p"), |
525 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T41"), | |
526 | HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T42p"), | |
527 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T42"), | |
528 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T43"), | |
529 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T60"), | |
530 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad X40"), | |
531 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad X41"), | |
532 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X60"), | |
533 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad Z60m"), | |
534 | { .ident = NULL } | |
535 | }; | |
0f6c840d | 536 | |
860e1d6b RL |
537 | static int __init hdaps_init(void) |
538 | { | |
539 | int ret; | |
540 | ||
860e1d6b RL |
541 | if (!dmi_check_system(hdaps_whitelist)) { |
542 | printk(KERN_WARNING "hdaps: supported laptop not found!\n"); | |
b3f28a9a | 543 | ret = -ENODEV; |
860e1d6b RL |
544 | goto out; |
545 | } | |
546 | ||
547 | if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "hdaps")) { | |
548 | ret = -ENXIO; | |
549 | goto out; | |
550 | } | |
551 | ||
3ae5eaec | 552 | ret = platform_driver_register(&hdaps_driver); |
860e1d6b RL |
553 | if (ret) |
554 | goto out_region; | |
555 | ||
556 | pdev = platform_device_register_simple("hdaps", -1, NULL, 0); | |
557 | if (IS_ERR(pdev)) { | |
558 | ret = PTR_ERR(pdev); | |
559 | goto out_driver; | |
560 | } | |
561 | ||
562 | ret = sysfs_create_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
563 | if (ret) | |
564 | goto out_device; | |
565 | ||
d12eb7e1 DT |
566 | hdaps_idev = input_allocate_device(); |
567 | if (!hdaps_idev) { | |
568 | ret = -ENOMEM; | |
569 | goto out_group; | |
570 | } | |
571 | ||
393ad299 RL |
572 | /* initial calibrate for the input device */ |
573 | hdaps_calibrate(); | |
574 | ||
575 | /* initialize the input class */ | |
d12eb7e1 | 576 | hdaps_idev->name = "hdaps"; |
c5ddb547 | 577 | hdaps_idev->dev.parent = &pdev->dev; |
d12eb7e1 DT |
578 | hdaps_idev->evbit[0] = BIT(EV_ABS); |
579 | input_set_abs_params(hdaps_idev, ABS_X, | |
580 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); | |
657a19eb | 581 | input_set_abs_params(hdaps_idev, ABS_Y, |
d12eb7e1 DT |
582 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); |
583 | ||
b25a1063 DT |
584 | ret = input_register_device(hdaps_idev); |
585 | if (ret) | |
586 | goto out_idev; | |
393ad299 RL |
587 | |
588 | /* start up our timer for the input device */ | |
589 | init_timer(&hdaps_timer); | |
590 | hdaps_timer.function = hdaps_mousedev_poll; | |
591 | hdaps_timer.expires = jiffies + HDAPS_POLL_PERIOD; | |
592 | add_timer(&hdaps_timer); | |
860e1d6b RL |
593 | |
594 | printk(KERN_INFO "hdaps: driver successfully loaded.\n"); | |
595 | return 0; | |
596 | ||
b25a1063 DT |
597 | out_idev: |
598 | input_free_device(hdaps_idev); | |
d12eb7e1 DT |
599 | out_group: |
600 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
860e1d6b RL |
601 | out_device: |
602 | platform_device_unregister(pdev); | |
603 | out_driver: | |
3ae5eaec | 604 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
605 | out_region: |
606 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); | |
607 | out: | |
608 | printk(KERN_WARNING "hdaps: driver init failed (ret=%d)!\n", ret); | |
609 | return ret; | |
610 | } | |
611 | ||
612 | static void __exit hdaps_exit(void) | |
613 | { | |
393ad299 | 614 | del_timer_sync(&hdaps_timer); |
d12eb7e1 | 615 | input_unregister_device(hdaps_idev); |
860e1d6b RL |
616 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); |
617 | platform_device_unregister(pdev); | |
3ae5eaec | 618 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
619 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); |
620 | ||
621 | printk(KERN_INFO "hdaps: driver unloaded.\n"); | |
622 | } | |
623 | ||
624 | module_init(hdaps_init); | |
625 | module_exit(hdaps_exit); | |
626 | ||
860e1d6b RL |
627 | module_param_named(invert, hdaps_invert, bool, 0); |
628 | MODULE_PARM_DESC(invert, "invert data along each axis"); | |
629 | ||
630 | MODULE_AUTHOR("Robert Love"); | |
631 | MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver"); | |
632 | MODULE_LICENSE("GPL v2"); |