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> | |
36 | #include <asm/io.h> | |
37 | ||
38 | #define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */ | |
393ad299 | 39 | #define HDAPS_NR_PORTS 0x30 /* number of ports: 0x1600 - 0x162f */ |
860e1d6b RL |
40 | |
41 | #define HDAPS_PORT_STATE 0x1611 /* device state */ | |
42 | #define HDAPS_PORT_YPOS 0x1612 /* y-axis position */ | |
43 | #define HDAPS_PORT_XPOS 0x1614 /* x-axis position */ | |
0a704681 | 44 | #define HDAPS_PORT_TEMP1 0x1616 /* device temperature, in Celsius */ |
860e1d6b RL |
45 | #define HDAPS_PORT_YVAR 0x1617 /* y-axis variance (what is this?) */ |
46 | #define HDAPS_PORT_XVAR 0x1619 /* x-axis variance (what is this?) */ | |
47 | #define HDAPS_PORT_TEMP2 0x161b /* device temperature (again?) */ | |
48 | #define HDAPS_PORT_UNKNOWN 0x161c /* what is this? */ | |
49 | #define HDAPS_PORT_KMACT 0x161d /* keyboard or mouse activity */ | |
50 | ||
393ad299 | 51 | #define STATE_FRESH 0x50 /* accelerometer data is fresh */ |
860e1d6b RL |
52 | |
53 | #define KEYBD_MASK 0x20 /* set if keyboard activity */ | |
54 | #define MOUSE_MASK 0x40 /* set if mouse activity */ | |
55 | #define KEYBD_ISSET(n) (!! (n & KEYBD_MASK)) /* keyboard used? */ | |
56 | #define MOUSE_ISSET(n) (!! (n & MOUSE_MASK)) /* mouse used? */ | |
57 | ||
58 | #define INIT_TIMEOUT_MSECS 4000 /* wait up to 4s for device init ... */ | |
59 | #define INIT_WAIT_MSECS 200 /* ... in 200ms increments */ | |
60 | ||
393ad299 RL |
61 | #define HDAPS_POLL_PERIOD (HZ/20) /* poll for input every 1/20s */ |
62 | #define HDAPS_INPUT_FUZZ 4 /* input event threshold */ | |
d12eb7e1 | 63 | #define HDAPS_INPUT_FLAT 4 |
393ad299 | 64 | |
860e1d6b | 65 | static struct timer_list hdaps_timer; |
393ad299 | 66 | static struct platform_device *pdev; |
d12eb7e1 | 67 | static struct input_dev *hdaps_idev; |
860e1d6b RL |
68 | static unsigned int hdaps_invert; |
69 | static u8 km_activity; | |
70 | static int rest_x; | |
71 | static int rest_y; | |
72 | ||
597a7679 | 73 | static DECLARE_MUTEX(hdaps_sem); |
860e1d6b RL |
74 | |
75 | /* | |
597a7679 | 76 | * __get_latch - Get the value from a given port. Callers must hold hdaps_sem. |
860e1d6b RL |
77 | */ |
78 | static inline u8 __get_latch(u16 port) | |
79 | { | |
393ad299 | 80 | return inb(port) & 0xff; |
860e1d6b RL |
81 | } |
82 | ||
83 | /* | |
393ad299 | 84 | * __check_latch - Check a port latch for a given value. Returns zero if the |
597a7679 | 85 | * port contains the given value. Callers must hold hdaps_sem. |
860e1d6b | 86 | */ |
393ad299 | 87 | static inline int __check_latch(u16 port, u8 val) |
860e1d6b RL |
88 | { |
89 | if (__get_latch(port) == val) | |
90 | return 0; | |
91 | return -EINVAL; | |
92 | } | |
93 | ||
94 | /* | |
95 | * __wait_latch - Wait up to 100us for a port latch to get a certain value, | |
597a7679 | 96 | * returning zero if the value is obtained. Callers must hold hdaps_sem. |
860e1d6b | 97 | */ |
393ad299 | 98 | static int __wait_latch(u16 port, u8 val) |
860e1d6b RL |
99 | { |
100 | unsigned int i; | |
101 | ||
102 | for (i = 0; i < 20; i++) { | |
103 | if (!__check_latch(port, val)) | |
104 | return 0; | |
105 | udelay(5); | |
106 | } | |
107 | ||
393ad299 | 108 | return -EIO; |
860e1d6b RL |
109 | } |
110 | ||
111 | /* | |
393ad299 | 112 | * __device_refresh - request a refresh from the accelerometer. Does not wait |
597a7679 | 113 | * for refresh to complete. Callers must hold hdaps_sem. |
860e1d6b | 114 | */ |
393ad299 | 115 | static void __device_refresh(void) |
860e1d6b | 116 | { |
393ad299 RL |
117 | udelay(200); |
118 | if (inb(0x1604) != STATE_FRESH) { | |
119 | outb(0x11, 0x1610); | |
120 | outb(0x01, 0x161f); | |
121 | } | |
122 | } | |
860e1d6b | 123 | |
393ad299 RL |
124 | /* |
125 | * __device_refresh_sync - request a synchronous refresh from the | |
126 | * accelerometer. We wait for the refresh to complete. Returns zero if | |
597a7679 | 127 | * successful and nonzero on error. Callers must hold hdaps_sem. |
393ad299 RL |
128 | */ |
129 | static int __device_refresh_sync(void) | |
130 | { | |
131 | __device_refresh(); | |
860e1d6b RL |
132 | return __wait_latch(0x1604, STATE_FRESH); |
133 | } | |
134 | ||
135 | /* | |
393ad299 | 136 | * __device_complete - indicate to the accelerometer that we are done reading |
597a7679 | 137 | * data, and then initiate an async refresh. Callers must hold hdaps_sem. |
860e1d6b RL |
138 | */ |
139 | static inline void __device_complete(void) | |
140 | { | |
141 | inb(0x161f); | |
142 | inb(0x1604); | |
393ad299 | 143 | __device_refresh(); |
860e1d6b RL |
144 | } |
145 | ||
146 | /* | |
147 | * hdaps_readb_one - reads a byte from a single I/O port, placing the value in | |
148 | * the given pointer. Returns zero on success or a negative error on failure. | |
149 | * Can sleep. | |
150 | */ | |
151 | static int hdaps_readb_one(unsigned int port, u8 *val) | |
152 | { | |
153 | int ret; | |
154 | ||
597a7679 | 155 | down(&hdaps_sem); |
860e1d6b | 156 | |
393ad299 RL |
157 | /* do a sync refresh -- we need to be sure that we read fresh data */ |
158 | ret = __device_refresh_sync(); | |
159 | if (ret) | |
160 | goto out; | |
161 | ||
162 | *val = inb(port); | |
163 | __device_complete(); | |
164 | ||
165 | out: | |
597a7679 | 166 | up(&hdaps_sem); |
860e1d6b RL |
167 | return ret; |
168 | } | |
169 | ||
393ad299 | 170 | /* __hdaps_read_pair - internal lockless helper for hdaps_read_pair(). */ |
860e1d6b RL |
171 | static int __hdaps_read_pair(unsigned int port1, unsigned int port2, |
172 | int *x, int *y) | |
173 | { | |
174 | /* do a sync refresh -- we need to be sure that we read fresh data */ | |
393ad299 | 175 | if (__device_refresh_sync()) |
860e1d6b RL |
176 | return -EIO; |
177 | ||
178 | *y = inw(port2); | |
179 | *x = inw(port1); | |
180 | km_activity = inb(HDAPS_PORT_KMACT); | |
181 | __device_complete(); | |
182 | ||
183 | /* if hdaps_invert is set, negate the two values */ | |
184 | if (hdaps_invert) { | |
185 | *x = -*x; | |
186 | *y = -*y; | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | /* | |
193 | * hdaps_read_pair - reads the values from a pair of ports, placing the values | |
194 | * in the given pointers. Returns zero on success. Can sleep. | |
195 | */ | |
196 | static int hdaps_read_pair(unsigned int port1, unsigned int port2, | |
197 | int *val1, int *val2) | |
198 | { | |
199 | int ret; | |
200 | ||
597a7679 | 201 | down(&hdaps_sem); |
860e1d6b | 202 | ret = __hdaps_read_pair(port1, port2, val1, val2); |
597a7679 | 203 | up(&hdaps_sem); |
860e1d6b RL |
204 | |
205 | return ret; | |
206 | } | |
207 | ||
393ad299 RL |
208 | /* |
209 | * hdaps_device_init - initialize the accelerometer. Returns zero on success | |
210 | * and negative error code on failure. Can sleep. | |
211 | */ | |
860e1d6b RL |
212 | static int hdaps_device_init(void) |
213 | { | |
393ad299 | 214 | int total, ret = -ENXIO; |
860e1d6b | 215 | |
597a7679 | 216 | down(&hdaps_sem); |
860e1d6b RL |
217 | |
218 | outb(0x13, 0x1610); | |
219 | outb(0x01, 0x161f); | |
220 | if (__wait_latch(0x161f, 0x00)) | |
221 | goto out; | |
222 | ||
223 | /* | |
393ad299 RL |
224 | * Most ThinkPads return 0x01. |
225 | * | |
226 | * Others--namely the R50p, T41p, and T42p--return 0x03. These laptops | |
227 | * have "inverted" axises. | |
860e1d6b RL |
228 | * |
229 | * The 0x02 value occurs when the chip has been previously initialized. | |
230 | */ | |
231 | if (__check_latch(0x1611, 0x03) && | |
232 | __check_latch(0x1611, 0x02) && | |
233 | __check_latch(0x1611, 0x01)) | |
234 | goto out; | |
235 | ||
236 | printk(KERN_DEBUG "hdaps: initial latch check good (0x%02x).\n", | |
237 | __get_latch(0x1611)); | |
238 | ||
239 | outb(0x17, 0x1610); | |
240 | outb(0x81, 0x1611); | |
241 | outb(0x01, 0x161f); | |
242 | if (__wait_latch(0x161f, 0x00)) | |
243 | goto out; | |
244 | if (__wait_latch(0x1611, 0x00)) | |
245 | goto out; | |
246 | if (__wait_latch(0x1612, 0x60)) | |
247 | goto out; | |
248 | if (__wait_latch(0x1613, 0x00)) | |
249 | goto out; | |
250 | outb(0x14, 0x1610); | |
251 | outb(0x01, 0x1611); | |
252 | outb(0x01, 0x161f); | |
253 | if (__wait_latch(0x161f, 0x00)) | |
254 | goto out; | |
255 | outb(0x10, 0x1610); | |
256 | outb(0xc8, 0x1611); | |
257 | outb(0x00, 0x1612); | |
258 | outb(0x02, 0x1613); | |
259 | outb(0x01, 0x161f); | |
260 | if (__wait_latch(0x161f, 0x00)) | |
261 | goto out; | |
393ad299 | 262 | if (__device_refresh_sync()) |
860e1d6b RL |
263 | goto out; |
264 | if (__wait_latch(0x1611, 0x00)) | |
265 | goto out; | |
266 | ||
267 | /* we have done our dance, now let's wait for the applause */ | |
393ad299 RL |
268 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
269 | int x, y; | |
860e1d6b RL |
270 | |
271 | /* a read of the device helps push it into action */ | |
393ad299 | 272 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); |
860e1d6b RL |
273 | if (!__wait_latch(0x1611, 0x02)) { |
274 | ret = 0; | |
275 | break; | |
276 | } | |
277 | ||
278 | msleep(INIT_WAIT_MSECS); | |
860e1d6b RL |
279 | } |
280 | ||
281 | out: | |
597a7679 | 282 | up(&hdaps_sem); |
860e1d6b RL |
283 | return ret; |
284 | } | |
285 | ||
286 | ||
860e1d6b RL |
287 | /* Device model stuff */ |
288 | ||
3ae5eaec | 289 | static int hdaps_probe(struct platform_device *dev) |
860e1d6b RL |
290 | { |
291 | int ret; | |
292 | ||
293 | ret = hdaps_device_init(); | |
294 | if (ret) | |
295 | return ret; | |
296 | ||
297 | printk(KERN_INFO "hdaps: device successfully initialized.\n"); | |
298 | return 0; | |
299 | } | |
300 | ||
3ae5eaec | 301 | static int hdaps_resume(struct platform_device *dev) |
860e1d6b | 302 | { |
9480e307 | 303 | return hdaps_device_init(); |
860e1d6b RL |
304 | } |
305 | ||
3ae5eaec | 306 | static struct platform_driver hdaps_driver = { |
860e1d6b | 307 | .probe = hdaps_probe, |
3ae5eaec RK |
308 | .resume = hdaps_resume, |
309 | .driver = { | |
310 | .name = "hdaps", | |
311 | .owner = THIS_MODULE, | |
312 | }, | |
860e1d6b RL |
313 | }; |
314 | ||
393ad299 | 315 | /* |
597a7679 | 316 | * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_sem. |
393ad299 RL |
317 | */ |
318 | static void hdaps_calibrate(void) | |
319 | { | |
320 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &rest_x, &rest_y); | |
321 | } | |
322 | ||
323 | static void hdaps_mousedev_poll(unsigned long unused) | |
324 | { | |
325 | int x, y; | |
326 | ||
327 | /* Cannot sleep. Try nonblockingly. If we fail, try again later. */ | |
597a7679 | 328 | if (down_trylock(&hdaps_sem)) { |
393ad299 RL |
329 | mod_timer(&hdaps_timer,jiffies + HDAPS_POLL_PERIOD); |
330 | return; | |
331 | } | |
332 | ||
333 | if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y)) | |
334 | goto out; | |
335 | ||
d12eb7e1 DT |
336 | input_report_abs(hdaps_idev, ABS_X, x - rest_x); |
337 | input_report_abs(hdaps_idev, ABS_Y, y - rest_y); | |
338 | input_sync(hdaps_idev); | |
393ad299 RL |
339 | |
340 | mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD); | |
341 | ||
342 | out: | |
597a7679 | 343 | up(&hdaps_sem); |
393ad299 RL |
344 | } |
345 | ||
860e1d6b RL |
346 | |
347 | /* Sysfs Files */ | |
348 | ||
349 | static ssize_t hdaps_position_show(struct device *dev, | |
350 | struct device_attribute *attr, char *buf) | |
351 | { | |
352 | int ret, x, y; | |
353 | ||
354 | ret = hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); | |
355 | if (ret) | |
356 | return ret; | |
357 | ||
358 | return sprintf(buf, "(%d,%d)\n", x, y); | |
359 | } | |
360 | ||
361 | static ssize_t hdaps_variance_show(struct device *dev, | |
362 | struct device_attribute *attr, char *buf) | |
363 | { | |
364 | int ret, x, y; | |
365 | ||
366 | ret = hdaps_read_pair(HDAPS_PORT_XVAR, HDAPS_PORT_YVAR, &x, &y); | |
367 | if (ret) | |
368 | return ret; | |
369 | ||
370 | return sprintf(buf, "(%d,%d)\n", x, y); | |
371 | } | |
372 | ||
373 | static ssize_t hdaps_temp1_show(struct device *dev, | |
374 | struct device_attribute *attr, char *buf) | |
375 | { | |
376 | u8 temp; | |
377 | int ret; | |
378 | ||
379 | ret = hdaps_readb_one(HDAPS_PORT_TEMP1, &temp); | |
380 | if (ret < 0) | |
381 | return ret; | |
382 | ||
383 | return sprintf(buf, "%u\n", temp); | |
384 | } | |
385 | ||
386 | static ssize_t hdaps_temp2_show(struct device *dev, | |
387 | struct device_attribute *attr, char *buf) | |
388 | { | |
389 | u8 temp; | |
390 | int ret; | |
391 | ||
392 | ret = hdaps_readb_one(HDAPS_PORT_TEMP2, &temp); | |
393 | if (ret < 0) | |
394 | return ret; | |
395 | ||
396 | return sprintf(buf, "%u\n", temp); | |
397 | } | |
398 | ||
399 | static ssize_t hdaps_keyboard_activity_show(struct device *dev, | |
400 | struct device_attribute *attr, | |
401 | char *buf) | |
402 | { | |
403 | return sprintf(buf, "%u\n", KEYBD_ISSET(km_activity)); | |
404 | } | |
405 | ||
406 | static ssize_t hdaps_mouse_activity_show(struct device *dev, | |
407 | struct device_attribute *attr, | |
408 | char *buf) | |
409 | { | |
410 | return sprintf(buf, "%u\n", MOUSE_ISSET(km_activity)); | |
411 | } | |
412 | ||
413 | static ssize_t hdaps_calibrate_show(struct device *dev, | |
414 | struct device_attribute *attr, char *buf) | |
415 | { | |
416 | return sprintf(buf, "(%d,%d)\n", rest_x, rest_y); | |
417 | } | |
418 | ||
419 | static ssize_t hdaps_calibrate_store(struct device *dev, | |
420 | struct device_attribute *attr, | |
421 | const char *buf, size_t count) | |
422 | { | |
597a7679 | 423 | down(&hdaps_sem); |
860e1d6b | 424 | hdaps_calibrate(); |
597a7679 | 425 | up(&hdaps_sem); |
860e1d6b RL |
426 | |
427 | return count; | |
428 | } | |
429 | ||
430 | static ssize_t hdaps_invert_show(struct device *dev, | |
431 | struct device_attribute *attr, char *buf) | |
432 | { | |
433 | return sprintf(buf, "%u\n", hdaps_invert); | |
434 | } | |
435 | ||
436 | static ssize_t hdaps_invert_store(struct device *dev, | |
437 | struct device_attribute *attr, | |
438 | const char *buf, size_t count) | |
439 | { | |
440 | int invert; | |
441 | ||
442 | if (sscanf(buf, "%d", &invert) != 1 || (invert != 1 && invert != 0)) | |
443 | return -EINVAL; | |
444 | ||
445 | hdaps_invert = invert; | |
446 | hdaps_calibrate(); | |
447 | ||
448 | return count; | |
449 | } | |
450 | ||
860e1d6b RL |
451 | static DEVICE_ATTR(position, 0444, hdaps_position_show, NULL); |
452 | static DEVICE_ATTR(variance, 0444, hdaps_variance_show, NULL); | |
453 | static DEVICE_ATTR(temp1, 0444, hdaps_temp1_show, NULL); | |
454 | static DEVICE_ATTR(temp2, 0444, hdaps_temp2_show, NULL); | |
455 | static DEVICE_ATTR(keyboard_activity, 0444, hdaps_keyboard_activity_show, NULL); | |
456 | static DEVICE_ATTR(mouse_activity, 0444, hdaps_mouse_activity_show, NULL); | |
457 | static DEVICE_ATTR(calibrate, 0644, hdaps_calibrate_show,hdaps_calibrate_store); | |
458 | static DEVICE_ATTR(invert, 0644, hdaps_invert_show, hdaps_invert_store); | |
860e1d6b RL |
459 | |
460 | static struct attribute *hdaps_attributes[] = { | |
461 | &dev_attr_position.attr, | |
462 | &dev_attr_variance.attr, | |
463 | &dev_attr_temp1.attr, | |
464 | &dev_attr_temp2.attr, | |
465 | &dev_attr_keyboard_activity.attr, | |
466 | &dev_attr_mouse_activity.attr, | |
467 | &dev_attr_calibrate.attr, | |
860e1d6b RL |
468 | &dev_attr_invert.attr, |
469 | NULL, | |
470 | }; | |
471 | ||
472 | static struct attribute_group hdaps_attribute_group = { | |
473 | .attrs = hdaps_attributes, | |
474 | }; | |
475 | ||
476 | ||
477 | /* Module stuff */ | |
478 | ||
4c87b74c | 479 | /* hdaps_dmi_match - found a match. return one, short-circuiting the hunt. */ |
860e1d6b RL |
480 | static int hdaps_dmi_match(struct dmi_system_id *id) |
481 | { | |
482 | printk(KERN_INFO "hdaps: %s detected.\n", id->ident); | |
4c87b74c | 483 | return 1; |
860e1d6b RL |
484 | } |
485 | ||
4c87b74c | 486 | /* hdaps_dmi_match_invert - found an inverted match. */ |
860e1d6b RL |
487 | static int hdaps_dmi_match_invert(struct dmi_system_id *id) |
488 | { | |
489 | hdaps_invert = 1; | |
490 | printk(KERN_INFO "hdaps: inverting axis readings.\n"); | |
4c87b74c | 491 | return hdaps_dmi_match(id); |
860e1d6b RL |
492 | } |
493 | ||
494 | #define HDAPS_DMI_MATCH_NORMAL(model) { \ | |
495 | .ident = "IBM " model, \ | |
496 | .callback = hdaps_dmi_match, \ | |
497 | .matches = { \ | |
498 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), \ | |
499 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ | |
500 | } \ | |
501 | } | |
502 | ||
503 | #define HDAPS_DMI_MATCH_INVERT(model) { \ | |
504 | .ident = "IBM " model, \ | |
505 | .callback = hdaps_dmi_match_invert, \ | |
506 | .matches = { \ | |
507 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), \ | |
508 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ | |
509 | } \ | |
510 | } | |
511 | ||
0f6c840d RL |
512 | #define HDAPS_DMI_MATCH_LENOVO(model) { \ |
513 | .ident = "Lenovo " model, \ | |
514 | .callback = hdaps_dmi_match_invert, \ | |
515 | .matches = { \ | |
516 | DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), \ | |
517 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ | |
518 | } \ | |
519 | } | |
520 | ||
860e1d6b RL |
521 | static int __init hdaps_init(void) |
522 | { | |
523 | int ret; | |
524 | ||
4f507ea1 JD |
525 | /* Note that HDAPS_DMI_MATCH_NORMAL("ThinkPad T42") would match |
526 | "ThinkPad T42p", so the order of the entries matters */ | |
860e1d6b | 527 | struct dmi_system_id hdaps_whitelist[] = { |
653edba1 | 528 | HDAPS_DMI_MATCH_NORMAL("ThinkPad H"), |
860e1d6b RL |
529 | HDAPS_DMI_MATCH_INVERT("ThinkPad R50p"), |
530 | HDAPS_DMI_MATCH_NORMAL("ThinkPad R50"), | |
531 | HDAPS_DMI_MATCH_NORMAL("ThinkPad R51"), | |
4c87b74c | 532 | HDAPS_DMI_MATCH_NORMAL("ThinkPad R52"), |
4f507ea1 | 533 | HDAPS_DMI_MATCH_NORMAL("ThinkPad H"), /* R52 (1846AQG) */ |
860e1d6b RL |
534 | HDAPS_DMI_MATCH_INVERT("ThinkPad T41p"), |
535 | HDAPS_DMI_MATCH_NORMAL("ThinkPad T41"), | |
536 | HDAPS_DMI_MATCH_INVERT("ThinkPad T42p"), | |
537 | HDAPS_DMI_MATCH_NORMAL("ThinkPad T42"), | |
538 | HDAPS_DMI_MATCH_NORMAL("ThinkPad T43"), | |
0f6c840d | 539 | HDAPS_DMI_MATCH_LENOVO("ThinkPad T60p"), |
860e1d6b | 540 | HDAPS_DMI_MATCH_NORMAL("ThinkPad X40"), |
4c87b74c | 541 | HDAPS_DMI_MATCH_NORMAL("ThinkPad X41"), |
0f6c840d | 542 | HDAPS_DMI_MATCH_LENOVO("ThinkPad X60"), |
4f507ea1 | 543 | HDAPS_DMI_MATCH_NORMAL("ThinkPad Z60m"), |
860e1d6b RL |
544 | { .ident = NULL } |
545 | }; | |
546 | ||
547 | if (!dmi_check_system(hdaps_whitelist)) { | |
548 | printk(KERN_WARNING "hdaps: supported laptop not found!\n"); | |
b3f28a9a | 549 | ret = -ENODEV; |
860e1d6b RL |
550 | goto out; |
551 | } | |
552 | ||
553 | if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "hdaps")) { | |
554 | ret = -ENXIO; | |
555 | goto out; | |
556 | } | |
557 | ||
3ae5eaec | 558 | ret = platform_driver_register(&hdaps_driver); |
860e1d6b RL |
559 | if (ret) |
560 | goto out_region; | |
561 | ||
562 | pdev = platform_device_register_simple("hdaps", -1, NULL, 0); | |
563 | if (IS_ERR(pdev)) { | |
564 | ret = PTR_ERR(pdev); | |
565 | goto out_driver; | |
566 | } | |
567 | ||
568 | ret = sysfs_create_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
569 | if (ret) | |
570 | goto out_device; | |
571 | ||
d12eb7e1 DT |
572 | hdaps_idev = input_allocate_device(); |
573 | if (!hdaps_idev) { | |
574 | ret = -ENOMEM; | |
575 | goto out_group; | |
576 | } | |
577 | ||
393ad299 RL |
578 | /* initial calibrate for the input device */ |
579 | hdaps_calibrate(); | |
580 | ||
581 | /* initialize the input class */ | |
d12eb7e1 DT |
582 | hdaps_idev->name = "hdaps"; |
583 | hdaps_idev->cdev.dev = &pdev->dev; | |
584 | hdaps_idev->evbit[0] = BIT(EV_ABS); | |
585 | input_set_abs_params(hdaps_idev, ABS_X, | |
586 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); | |
657a19eb | 587 | input_set_abs_params(hdaps_idev, ABS_Y, |
d12eb7e1 DT |
588 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); |
589 | ||
590 | input_register_device(hdaps_idev); | |
393ad299 RL |
591 | |
592 | /* start up our timer for the input device */ | |
593 | init_timer(&hdaps_timer); | |
594 | hdaps_timer.function = hdaps_mousedev_poll; | |
595 | hdaps_timer.expires = jiffies + HDAPS_POLL_PERIOD; | |
596 | add_timer(&hdaps_timer); | |
860e1d6b RL |
597 | |
598 | printk(KERN_INFO "hdaps: driver successfully loaded.\n"); | |
599 | return 0; | |
600 | ||
d12eb7e1 DT |
601 | out_group: |
602 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
860e1d6b RL |
603 | out_device: |
604 | platform_device_unregister(pdev); | |
605 | out_driver: | |
3ae5eaec | 606 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
607 | out_region: |
608 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); | |
609 | out: | |
610 | printk(KERN_WARNING "hdaps: driver init failed (ret=%d)!\n", ret); | |
611 | return ret; | |
612 | } | |
613 | ||
614 | static void __exit hdaps_exit(void) | |
615 | { | |
393ad299 | 616 | del_timer_sync(&hdaps_timer); |
d12eb7e1 | 617 | input_unregister_device(hdaps_idev); |
860e1d6b RL |
618 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); |
619 | platform_device_unregister(pdev); | |
3ae5eaec | 620 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
621 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); |
622 | ||
623 | printk(KERN_INFO "hdaps: driver unloaded.\n"); | |
624 | } | |
625 | ||
626 | module_init(hdaps_init); | |
627 | module_exit(hdaps_exit); | |
628 | ||
860e1d6b RL |
629 | module_param_named(invert, hdaps_invert, bool, 0); |
630 | MODULE_PARM_DESC(invert, "invert data along each axis"); | |
631 | ||
632 | MODULE_AUTHOR("Robert Love"); | |
633 | MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver"); | |
634 | MODULE_LICENSE("GPL v2"); |