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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> | |
33 | #include <linux/module.h> | |
34 | #include <linux/timer.h> | |
35 | #include <linux/dmi.h> | |
9a61bf63 | 36 | #include <linux/mutex.h> |
860e1d6b RL |
37 | #include <asm/io.h> |
38 | ||
39 | #define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */ | |
393ad299 | 40 | #define HDAPS_NR_PORTS 0x30 /* number of ports: 0x1600 - 0x162f */ |
860e1d6b RL |
41 | |
42 | #define HDAPS_PORT_STATE 0x1611 /* device state */ | |
43 | #define HDAPS_PORT_YPOS 0x1612 /* y-axis position */ | |
44 | #define HDAPS_PORT_XPOS 0x1614 /* x-axis position */ | |
45 | #define HDAPS_PORT_TEMP1 0x1616 /* device temperature, in celcius */ | |
46 | #define HDAPS_PORT_YVAR 0x1617 /* y-axis variance (what is this?) */ | |
47 | #define HDAPS_PORT_XVAR 0x1619 /* x-axis variance (what is this?) */ | |
48 | #define HDAPS_PORT_TEMP2 0x161b /* device temperature (again?) */ | |
49 | #define HDAPS_PORT_UNKNOWN 0x161c /* what is this? */ | |
50 | #define HDAPS_PORT_KMACT 0x161d /* keyboard or mouse activity */ | |
51 | ||
393ad299 | 52 | #define STATE_FRESH 0x50 /* accelerometer data is fresh */ |
860e1d6b RL |
53 | |
54 | #define KEYBD_MASK 0x20 /* set if keyboard activity */ | |
55 | #define MOUSE_MASK 0x40 /* set if mouse activity */ | |
56 | #define KEYBD_ISSET(n) (!! (n & KEYBD_MASK)) /* keyboard used? */ | |
57 | #define MOUSE_ISSET(n) (!! (n & MOUSE_MASK)) /* mouse used? */ | |
58 | ||
59 | #define INIT_TIMEOUT_MSECS 4000 /* wait up to 4s for device init ... */ | |
60 | #define INIT_WAIT_MSECS 200 /* ... in 200ms increments */ | |
61 | ||
393ad299 RL |
62 | #define HDAPS_POLL_PERIOD (HZ/20) /* poll for input every 1/20s */ |
63 | #define HDAPS_INPUT_FUZZ 4 /* input event threshold */ | |
d12eb7e1 | 64 | #define HDAPS_INPUT_FLAT 4 |
393ad299 | 65 | |
860e1d6b | 66 | static struct timer_list hdaps_timer; |
393ad299 | 67 | static struct platform_device *pdev; |
d12eb7e1 | 68 | static struct input_dev *hdaps_idev; |
860e1d6b RL |
69 | static unsigned int hdaps_invert; |
70 | static u8 km_activity; | |
71 | static int rest_x; | |
72 | static int rest_y; | |
73 | ||
9a61bf63 | 74 | static DEFINE_MUTEX(hdaps_mutex); |
860e1d6b RL |
75 | |
76 | /* | |
9a61bf63 | 77 | * __get_latch - Get the value from a given port. Callers must hold hdaps_mutex. |
860e1d6b RL |
78 | */ |
79 | static inline u8 __get_latch(u16 port) | |
80 | { | |
393ad299 | 81 | return inb(port) & 0xff; |
860e1d6b RL |
82 | } |
83 | ||
84 | /* | |
393ad299 | 85 | * __check_latch - Check a port latch for a given value. Returns zero if the |
9a61bf63 | 86 | * port contains the given value. Callers must hold hdaps_mutex. |
860e1d6b | 87 | */ |
393ad299 | 88 | static inline int __check_latch(u16 port, u8 val) |
860e1d6b RL |
89 | { |
90 | if (__get_latch(port) == val) | |
91 | return 0; | |
92 | return -EINVAL; | |
93 | } | |
94 | ||
95 | /* | |
96 | * __wait_latch - Wait up to 100us for a port latch to get a certain value, | |
9a61bf63 | 97 | * returning zero if the value is obtained. Callers must hold hdaps_mutex. |
860e1d6b | 98 | */ |
393ad299 | 99 | static int __wait_latch(u16 port, u8 val) |
860e1d6b RL |
100 | { |
101 | unsigned int i; | |
102 | ||
103 | for (i = 0; i < 20; i++) { | |
104 | if (!__check_latch(port, val)) | |
105 | return 0; | |
106 | udelay(5); | |
107 | } | |
108 | ||
393ad299 | 109 | return -EIO; |
860e1d6b RL |
110 | } |
111 | ||
112 | /* | |
393ad299 | 113 | * __device_refresh - request a refresh from the accelerometer. Does not wait |
9a61bf63 | 114 | * for refresh to complete. Callers must hold hdaps_mutex. |
860e1d6b | 115 | */ |
393ad299 | 116 | static void __device_refresh(void) |
860e1d6b | 117 | { |
393ad299 RL |
118 | udelay(200); |
119 | if (inb(0x1604) != STATE_FRESH) { | |
120 | outb(0x11, 0x1610); | |
121 | outb(0x01, 0x161f); | |
122 | } | |
123 | } | |
860e1d6b | 124 | |
393ad299 RL |
125 | /* |
126 | * __device_refresh_sync - request a synchronous refresh from the | |
127 | * accelerometer. We wait for the refresh to complete. Returns zero if | |
9a61bf63 | 128 | * successful and nonzero on error. Callers must hold hdaps_mutex. |
393ad299 RL |
129 | */ |
130 | static int __device_refresh_sync(void) | |
131 | { | |
132 | __device_refresh(); | |
860e1d6b RL |
133 | return __wait_latch(0x1604, STATE_FRESH); |
134 | } | |
135 | ||
136 | /* | |
393ad299 | 137 | * __device_complete - indicate to the accelerometer that we are done reading |
9a61bf63 | 138 | * data, and then initiate an async refresh. Callers must hold hdaps_mutex. |
860e1d6b RL |
139 | */ |
140 | static inline void __device_complete(void) | |
141 | { | |
142 | inb(0x161f); | |
143 | inb(0x1604); | |
393ad299 | 144 | __device_refresh(); |
860e1d6b RL |
145 | } |
146 | ||
147 | /* | |
148 | * hdaps_readb_one - reads a byte from a single I/O port, placing the value in | |
149 | * the given pointer. Returns zero on success or a negative error on failure. | |
150 | * Can sleep. | |
151 | */ | |
152 | static int hdaps_readb_one(unsigned int port, u8 *val) | |
153 | { | |
154 | int ret; | |
155 | ||
9a61bf63 | 156 | mutex_lock(&hdaps_mutex); |
860e1d6b | 157 | |
393ad299 RL |
158 | /* do a sync refresh -- we need to be sure that we read fresh data */ |
159 | ret = __device_refresh_sync(); | |
160 | if (ret) | |
161 | goto out; | |
162 | ||
163 | *val = inb(port); | |
164 | __device_complete(); | |
165 | ||
166 | out: | |
9a61bf63 | 167 | mutex_unlock(&hdaps_mutex); |
860e1d6b RL |
168 | return ret; |
169 | } | |
170 | ||
393ad299 | 171 | /* __hdaps_read_pair - internal lockless helper for hdaps_read_pair(). */ |
860e1d6b RL |
172 | static int __hdaps_read_pair(unsigned int port1, unsigned int port2, |
173 | int *x, int *y) | |
174 | { | |
175 | /* do a sync refresh -- we need to be sure that we read fresh data */ | |
393ad299 | 176 | if (__device_refresh_sync()) |
860e1d6b RL |
177 | return -EIO; |
178 | ||
179 | *y = inw(port2); | |
180 | *x = inw(port1); | |
181 | km_activity = inb(HDAPS_PORT_KMACT); | |
182 | __device_complete(); | |
183 | ||
184 | /* if hdaps_invert is set, negate the two values */ | |
185 | if (hdaps_invert) { | |
186 | *x = -*x; | |
187 | *y = -*y; | |
188 | } | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | /* | |
194 | * hdaps_read_pair - reads the values from a pair of ports, placing the values | |
195 | * in the given pointers. Returns zero on success. Can sleep. | |
196 | */ | |
197 | static int hdaps_read_pair(unsigned int port1, unsigned int port2, | |
198 | int *val1, int *val2) | |
199 | { | |
200 | int ret; | |
201 | ||
9a61bf63 | 202 | mutex_lock(&hdaps_mutex); |
860e1d6b | 203 | ret = __hdaps_read_pair(port1, port2, val1, val2); |
9a61bf63 | 204 | mutex_unlock(&hdaps_mutex); |
860e1d6b RL |
205 | |
206 | return ret; | |
207 | } | |
208 | ||
393ad299 RL |
209 | /* |
210 | * hdaps_device_init - initialize the accelerometer. Returns zero on success | |
211 | * and negative error code on failure. Can sleep. | |
212 | */ | |
860e1d6b RL |
213 | static int hdaps_device_init(void) |
214 | { | |
393ad299 | 215 | int total, ret = -ENXIO; |
860e1d6b | 216 | |
9a61bf63 | 217 | mutex_lock(&hdaps_mutex); |
860e1d6b RL |
218 | |
219 | outb(0x13, 0x1610); | |
220 | outb(0x01, 0x161f); | |
221 | if (__wait_latch(0x161f, 0x00)) | |
222 | goto out; | |
223 | ||
224 | /* | |
393ad299 RL |
225 | * Most ThinkPads return 0x01. |
226 | * | |
227 | * Others--namely the R50p, T41p, and T42p--return 0x03. These laptops | |
228 | * have "inverted" axises. | |
860e1d6b RL |
229 | * |
230 | * The 0x02 value occurs when the chip has been previously initialized. | |
231 | */ | |
232 | if (__check_latch(0x1611, 0x03) && | |
233 | __check_latch(0x1611, 0x02) && | |
234 | __check_latch(0x1611, 0x01)) | |
235 | goto out; | |
236 | ||
237 | printk(KERN_DEBUG "hdaps: initial latch check good (0x%02x).\n", | |
238 | __get_latch(0x1611)); | |
239 | ||
240 | outb(0x17, 0x1610); | |
241 | outb(0x81, 0x1611); | |
242 | outb(0x01, 0x161f); | |
243 | if (__wait_latch(0x161f, 0x00)) | |
244 | goto out; | |
245 | if (__wait_latch(0x1611, 0x00)) | |
246 | goto out; | |
247 | if (__wait_latch(0x1612, 0x60)) | |
248 | goto out; | |
249 | if (__wait_latch(0x1613, 0x00)) | |
250 | goto out; | |
251 | outb(0x14, 0x1610); | |
252 | outb(0x01, 0x1611); | |
253 | outb(0x01, 0x161f); | |
254 | if (__wait_latch(0x161f, 0x00)) | |
255 | goto out; | |
256 | outb(0x10, 0x1610); | |
257 | outb(0xc8, 0x1611); | |
258 | outb(0x00, 0x1612); | |
259 | outb(0x02, 0x1613); | |
260 | outb(0x01, 0x161f); | |
261 | if (__wait_latch(0x161f, 0x00)) | |
262 | goto out; | |
393ad299 | 263 | if (__device_refresh_sync()) |
860e1d6b RL |
264 | goto out; |
265 | if (__wait_latch(0x1611, 0x00)) | |
266 | goto out; | |
267 | ||
268 | /* we have done our dance, now let's wait for the applause */ | |
393ad299 RL |
269 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
270 | int x, y; | |
860e1d6b RL |
271 | |
272 | /* a read of the device helps push it into action */ | |
393ad299 | 273 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); |
860e1d6b RL |
274 | if (!__wait_latch(0x1611, 0x02)) { |
275 | ret = 0; | |
276 | break; | |
277 | } | |
278 | ||
279 | msleep(INIT_WAIT_MSECS); | |
860e1d6b RL |
280 | } |
281 | ||
282 | out: | |
9a61bf63 | 283 | mutex_unlock(&hdaps_mutex); |
860e1d6b RL |
284 | return ret; |
285 | } | |
286 | ||
287 | ||
860e1d6b RL |
288 | /* Device model stuff */ |
289 | ||
3ae5eaec | 290 | static int hdaps_probe(struct platform_device *dev) |
860e1d6b RL |
291 | { |
292 | int ret; | |
293 | ||
294 | ret = hdaps_device_init(); | |
295 | if (ret) | |
296 | return ret; | |
297 | ||
298 | printk(KERN_INFO "hdaps: device successfully initialized.\n"); | |
299 | return 0; | |
300 | } | |
301 | ||
3ae5eaec | 302 | static int hdaps_resume(struct platform_device *dev) |
860e1d6b | 303 | { |
9480e307 | 304 | return hdaps_device_init(); |
860e1d6b RL |
305 | } |
306 | ||
3ae5eaec | 307 | static struct platform_driver hdaps_driver = { |
860e1d6b | 308 | .probe = hdaps_probe, |
3ae5eaec RK |
309 | .resume = hdaps_resume, |
310 | .driver = { | |
311 | .name = "hdaps", | |
312 | .owner = THIS_MODULE, | |
313 | }, | |
860e1d6b RL |
314 | }; |
315 | ||
393ad299 | 316 | /* |
9a61bf63 | 317 | * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_mutex. |
393ad299 RL |
318 | */ |
319 | static void hdaps_calibrate(void) | |
320 | { | |
321 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &rest_x, &rest_y); | |
322 | } | |
323 | ||
324 | static void hdaps_mousedev_poll(unsigned long unused) | |
325 | { | |
326 | int x, y; | |
327 | ||
328 | /* Cannot sleep. Try nonblockingly. If we fail, try again later. */ | |
9a61bf63 | 329 | if (!mutex_trylock(&hdaps_mutex)) { |
393ad299 RL |
330 | mod_timer(&hdaps_timer,jiffies + HDAPS_POLL_PERIOD); |
331 | return; | |
332 | } | |
333 | ||
334 | if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y)) | |
335 | goto out; | |
336 | ||
d12eb7e1 DT |
337 | input_report_abs(hdaps_idev, ABS_X, x - rest_x); |
338 | input_report_abs(hdaps_idev, ABS_Y, y - rest_y); | |
339 | input_sync(hdaps_idev); | |
393ad299 RL |
340 | |
341 | mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD); | |
342 | ||
343 | out: | |
9a61bf63 | 344 | mutex_unlock(&hdaps_mutex); |
393ad299 RL |
345 | } |
346 | ||
860e1d6b RL |
347 | |
348 | /* Sysfs Files */ | |
349 | ||
350 | static ssize_t hdaps_position_show(struct device *dev, | |
351 | struct device_attribute *attr, char *buf) | |
352 | { | |
353 | int ret, x, y; | |
354 | ||
355 | ret = hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); | |
356 | if (ret) | |
357 | return ret; | |
358 | ||
359 | return sprintf(buf, "(%d,%d)\n", x, y); | |
360 | } | |
361 | ||
362 | static ssize_t hdaps_variance_show(struct device *dev, | |
363 | struct device_attribute *attr, char *buf) | |
364 | { | |
365 | int ret, x, y; | |
366 | ||
367 | ret = hdaps_read_pair(HDAPS_PORT_XVAR, HDAPS_PORT_YVAR, &x, &y); | |
368 | if (ret) | |
369 | return ret; | |
370 | ||
371 | return sprintf(buf, "(%d,%d)\n", x, y); | |
372 | } | |
373 | ||
374 | static ssize_t hdaps_temp1_show(struct device *dev, | |
375 | struct device_attribute *attr, char *buf) | |
376 | { | |
377 | u8 temp; | |
378 | int ret; | |
379 | ||
380 | ret = hdaps_readb_one(HDAPS_PORT_TEMP1, &temp); | |
381 | if (ret < 0) | |
382 | return ret; | |
383 | ||
384 | return sprintf(buf, "%u\n", temp); | |
385 | } | |
386 | ||
387 | static ssize_t hdaps_temp2_show(struct device *dev, | |
388 | struct device_attribute *attr, char *buf) | |
389 | { | |
390 | u8 temp; | |
391 | int ret; | |
392 | ||
393 | ret = hdaps_readb_one(HDAPS_PORT_TEMP2, &temp); | |
394 | if (ret < 0) | |
395 | return ret; | |
396 | ||
397 | return sprintf(buf, "%u\n", temp); | |
398 | } | |
399 | ||
400 | static ssize_t hdaps_keyboard_activity_show(struct device *dev, | |
401 | struct device_attribute *attr, | |
402 | char *buf) | |
403 | { | |
404 | return sprintf(buf, "%u\n", KEYBD_ISSET(km_activity)); | |
405 | } | |
406 | ||
407 | static ssize_t hdaps_mouse_activity_show(struct device *dev, | |
408 | struct device_attribute *attr, | |
409 | char *buf) | |
410 | { | |
411 | return sprintf(buf, "%u\n", MOUSE_ISSET(km_activity)); | |
412 | } | |
413 | ||
414 | static ssize_t hdaps_calibrate_show(struct device *dev, | |
415 | struct device_attribute *attr, char *buf) | |
416 | { | |
417 | return sprintf(buf, "(%d,%d)\n", rest_x, rest_y); | |
418 | } | |
419 | ||
420 | static ssize_t hdaps_calibrate_store(struct device *dev, | |
421 | struct device_attribute *attr, | |
422 | const char *buf, size_t count) | |
423 | { | |
9a61bf63 | 424 | mutex_lock(&hdaps_mutex); |
860e1d6b | 425 | hdaps_calibrate(); |
9a61bf63 | 426 | mutex_unlock(&hdaps_mutex); |
860e1d6b RL |
427 | |
428 | return count; | |
429 | } | |
430 | ||
431 | static ssize_t hdaps_invert_show(struct device *dev, | |
432 | struct device_attribute *attr, char *buf) | |
433 | { | |
434 | return sprintf(buf, "%u\n", hdaps_invert); | |
435 | } | |
436 | ||
437 | static ssize_t hdaps_invert_store(struct device *dev, | |
438 | struct device_attribute *attr, | |
439 | const char *buf, size_t count) | |
440 | { | |
441 | int invert; | |
442 | ||
443 | if (sscanf(buf, "%d", &invert) != 1 || (invert != 1 && invert != 0)) | |
444 | return -EINVAL; | |
445 | ||
446 | hdaps_invert = invert; | |
447 | hdaps_calibrate(); | |
448 | ||
449 | return count; | |
450 | } | |
451 | ||
860e1d6b RL |
452 | static DEVICE_ATTR(position, 0444, hdaps_position_show, NULL); |
453 | static DEVICE_ATTR(variance, 0444, hdaps_variance_show, NULL); | |
454 | static DEVICE_ATTR(temp1, 0444, hdaps_temp1_show, NULL); | |
455 | static DEVICE_ATTR(temp2, 0444, hdaps_temp2_show, NULL); | |
456 | static DEVICE_ATTR(keyboard_activity, 0444, hdaps_keyboard_activity_show, NULL); | |
457 | static DEVICE_ATTR(mouse_activity, 0444, hdaps_mouse_activity_show, NULL); | |
458 | static DEVICE_ATTR(calibrate, 0644, hdaps_calibrate_show,hdaps_calibrate_store); | |
459 | static DEVICE_ATTR(invert, 0644, hdaps_invert_show, hdaps_invert_store); | |
860e1d6b RL |
460 | |
461 | static struct attribute *hdaps_attributes[] = { | |
462 | &dev_attr_position.attr, | |
463 | &dev_attr_variance.attr, | |
464 | &dev_attr_temp1.attr, | |
465 | &dev_attr_temp2.attr, | |
466 | &dev_attr_keyboard_activity.attr, | |
467 | &dev_attr_mouse_activity.attr, | |
468 | &dev_attr_calibrate.attr, | |
860e1d6b RL |
469 | &dev_attr_invert.attr, |
470 | NULL, | |
471 | }; | |
472 | ||
473 | static struct attribute_group hdaps_attribute_group = { | |
474 | .attrs = hdaps_attributes, | |
475 | }; | |
476 | ||
477 | ||
478 | /* Module stuff */ | |
479 | ||
4c87b74c | 480 | /* hdaps_dmi_match - found a match. return one, short-circuiting the hunt. */ |
860e1d6b RL |
481 | static int hdaps_dmi_match(struct dmi_system_id *id) |
482 | { | |
483 | printk(KERN_INFO "hdaps: %s detected.\n", id->ident); | |
4c87b74c | 484 | return 1; |
860e1d6b RL |
485 | } |
486 | ||
4c87b74c | 487 | /* hdaps_dmi_match_invert - found an inverted match. */ |
860e1d6b RL |
488 | static int hdaps_dmi_match_invert(struct dmi_system_id *id) |
489 | { | |
490 | hdaps_invert = 1; | |
491 | printk(KERN_INFO "hdaps: inverting axis readings.\n"); | |
4c87b74c | 492 | return hdaps_dmi_match(id); |
860e1d6b RL |
493 | } |
494 | ||
495 | #define HDAPS_DMI_MATCH_NORMAL(model) { \ | |
496 | .ident = "IBM " model, \ | |
497 | .callback = hdaps_dmi_match, \ | |
498 | .matches = { \ | |
499 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), \ | |
500 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ | |
501 | } \ | |
502 | } | |
503 | ||
504 | #define HDAPS_DMI_MATCH_INVERT(model) { \ | |
505 | .ident = "IBM " model, \ | |
506 | .callback = hdaps_dmi_match_invert, \ | |
507 | .matches = { \ | |
508 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), \ | |
509 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ | |
510 | } \ | |
511 | } | |
512 | ||
513 | static int __init hdaps_init(void) | |
514 | { | |
515 | int ret; | |
516 | ||
517 | /* Note that DMI_MATCH(...,"ThinkPad T42") will match "ThinkPad T42p" */ | |
518 | struct dmi_system_id hdaps_whitelist[] = { | |
519 | HDAPS_DMI_MATCH_INVERT("ThinkPad R50p"), | |
520 | HDAPS_DMI_MATCH_NORMAL("ThinkPad R50"), | |
521 | HDAPS_DMI_MATCH_NORMAL("ThinkPad R51"), | |
4c87b74c | 522 | HDAPS_DMI_MATCH_NORMAL("ThinkPad R52"), |
860e1d6b RL |
523 | HDAPS_DMI_MATCH_INVERT("ThinkPad T41p"), |
524 | HDAPS_DMI_MATCH_NORMAL("ThinkPad T41"), | |
525 | HDAPS_DMI_MATCH_INVERT("ThinkPad T42p"), | |
526 | HDAPS_DMI_MATCH_NORMAL("ThinkPad T42"), | |
527 | HDAPS_DMI_MATCH_NORMAL("ThinkPad T43"), | |
528 | HDAPS_DMI_MATCH_NORMAL("ThinkPad X40"), | |
393ad299 | 529 | HDAPS_DMI_MATCH_NORMAL("ThinkPad X41 Tablet"), |
4c87b74c | 530 | HDAPS_DMI_MATCH_NORMAL("ThinkPad X41"), |
860e1d6b RL |
531 | { .ident = NULL } |
532 | }; | |
533 | ||
534 | if (!dmi_check_system(hdaps_whitelist)) { | |
535 | printk(KERN_WARNING "hdaps: supported laptop not found!\n"); | |
536 | ret = -ENXIO; | |
537 | goto out; | |
538 | } | |
539 | ||
540 | if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "hdaps")) { | |
541 | ret = -ENXIO; | |
542 | goto out; | |
543 | } | |
544 | ||
3ae5eaec | 545 | ret = platform_driver_register(&hdaps_driver); |
860e1d6b RL |
546 | if (ret) |
547 | goto out_region; | |
548 | ||
549 | pdev = platform_device_register_simple("hdaps", -1, NULL, 0); | |
550 | if (IS_ERR(pdev)) { | |
551 | ret = PTR_ERR(pdev); | |
552 | goto out_driver; | |
553 | } | |
554 | ||
555 | ret = sysfs_create_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
556 | if (ret) | |
557 | goto out_device; | |
558 | ||
d12eb7e1 DT |
559 | hdaps_idev = input_allocate_device(); |
560 | if (!hdaps_idev) { | |
561 | ret = -ENOMEM; | |
562 | goto out_group; | |
563 | } | |
564 | ||
393ad299 RL |
565 | /* initial calibrate for the input device */ |
566 | hdaps_calibrate(); | |
567 | ||
568 | /* initialize the input class */ | |
d12eb7e1 DT |
569 | hdaps_idev->name = "hdaps"; |
570 | hdaps_idev->cdev.dev = &pdev->dev; | |
571 | hdaps_idev->evbit[0] = BIT(EV_ABS); | |
572 | input_set_abs_params(hdaps_idev, ABS_X, | |
573 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); | |
657a19eb | 574 | input_set_abs_params(hdaps_idev, ABS_Y, |
d12eb7e1 DT |
575 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); |
576 | ||
577 | input_register_device(hdaps_idev); | |
393ad299 RL |
578 | |
579 | /* start up our timer for the input device */ | |
580 | init_timer(&hdaps_timer); | |
581 | hdaps_timer.function = hdaps_mousedev_poll; | |
582 | hdaps_timer.expires = jiffies + HDAPS_POLL_PERIOD; | |
583 | add_timer(&hdaps_timer); | |
860e1d6b RL |
584 | |
585 | printk(KERN_INFO "hdaps: driver successfully loaded.\n"); | |
586 | return 0; | |
587 | ||
d12eb7e1 DT |
588 | out_group: |
589 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
860e1d6b RL |
590 | out_device: |
591 | platform_device_unregister(pdev); | |
592 | out_driver: | |
3ae5eaec | 593 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
594 | out_region: |
595 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); | |
596 | out: | |
597 | printk(KERN_WARNING "hdaps: driver init failed (ret=%d)!\n", ret); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | static void __exit hdaps_exit(void) | |
602 | { | |
393ad299 | 603 | del_timer_sync(&hdaps_timer); |
d12eb7e1 | 604 | input_unregister_device(hdaps_idev); |
860e1d6b RL |
605 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); |
606 | platform_device_unregister(pdev); | |
3ae5eaec | 607 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
608 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); |
609 | ||
610 | printk(KERN_INFO "hdaps: driver unloaded.\n"); | |
611 | } | |
612 | ||
613 | module_init(hdaps_init); | |
614 | module_exit(hdaps_exit); | |
615 | ||
860e1d6b RL |
616 | module_param_named(invert, hdaps_invert, bool, 0); |
617 | MODULE_PARM_DESC(invert, "invert data along each axis"); | |
618 | ||
619 | MODULE_AUTHOR("Robert Love"); | |
620 | MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver"); | |
621 | MODULE_LICENSE("GPL v2"); |