Commit | Line | Data |
---|---|---|
860e1d6b | 1 | /* |
bd9fc3a7 | 2 | * hdaps.c - driver for IBM's Hard Drive Active Protection System |
860e1d6b RL |
3 | * |
4 | * Copyright (C) 2005 Robert Love <rml@novell.com> | |
e4332e8e | 5 | * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net> |
860e1d6b | 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 | ||
611f5763 JP |
29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
30 | ||
860e1d6b | 31 | #include <linux/delay.h> |
d052d1be | 32 | #include <linux/platform_device.h> |
aefca8ba | 33 | #include <linux/input-polldev.h> |
860e1d6b | 34 | #include <linux/kernel.h> |
6acc369a | 35 | #include <linux/mutex.h> |
860e1d6b RL |
36 | #include <linux/module.h> |
37 | #include <linux/timer.h> | |
38 | #include <linux/dmi.h> | |
914e2637 | 39 | #include <linux/jiffies.h> |
6055fae8 | 40 | #include <linux/io.h> |
860e1d6b RL |
41 | |
42 | #define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */ | |
393ad299 | 43 | #define HDAPS_NR_PORTS 0x30 /* number of ports: 0x1600 - 0x162f */ |
860e1d6b RL |
44 | |
45 | #define HDAPS_PORT_STATE 0x1611 /* device state */ | |
46 | #define HDAPS_PORT_YPOS 0x1612 /* y-axis position */ | |
47 | #define HDAPS_PORT_XPOS 0x1614 /* x-axis position */ | |
0a704681 | 48 | #define HDAPS_PORT_TEMP1 0x1616 /* device temperature, in Celsius */ |
860e1d6b RL |
49 | #define HDAPS_PORT_YVAR 0x1617 /* y-axis variance (what is this?) */ |
50 | #define HDAPS_PORT_XVAR 0x1619 /* x-axis variance (what is this?) */ | |
51 | #define HDAPS_PORT_TEMP2 0x161b /* device temperature (again?) */ | |
52 | #define HDAPS_PORT_UNKNOWN 0x161c /* what is this? */ | |
53 | #define HDAPS_PORT_KMACT 0x161d /* keyboard or mouse activity */ | |
54 | ||
393ad299 | 55 | #define STATE_FRESH 0x50 /* accelerometer data is fresh */ |
860e1d6b RL |
56 | |
57 | #define KEYBD_MASK 0x20 /* set if keyboard activity */ | |
58 | #define MOUSE_MASK 0x40 /* set if mouse activity */ | |
59 | #define KEYBD_ISSET(n) (!! (n & KEYBD_MASK)) /* keyboard used? */ | |
60 | #define MOUSE_ISSET(n) (!! (n & MOUSE_MASK)) /* mouse used? */ | |
61 | ||
62 | #define INIT_TIMEOUT_MSECS 4000 /* wait up to 4s for device init ... */ | |
63 | #define INIT_WAIT_MSECS 200 /* ... in 200ms increments */ | |
64 | ||
aefca8ba | 65 | #define HDAPS_POLL_INTERVAL 50 /* poll for input every 1/20s (50 ms)*/ |
393ad299 | 66 | #define HDAPS_INPUT_FUZZ 4 /* input event threshold */ |
d12eb7e1 | 67 | #define HDAPS_INPUT_FLAT 4 |
393ad299 | 68 | |
2b8cf3e8 FS |
69 | #define HDAPS_X_AXIS (1 << 0) |
70 | #define HDAPS_Y_AXIS (1 << 1) | |
71 | #define HDAPS_BOTH_AXES (HDAPS_X_AXIS | HDAPS_Y_AXIS) | |
72 | ||
393ad299 | 73 | static struct platform_device *pdev; |
aefca8ba | 74 | static struct input_polled_dev *hdaps_idev; |
860e1d6b RL |
75 | static unsigned int hdaps_invert; |
76 | static u8 km_activity; | |
77 | static int rest_x; | |
78 | static int rest_y; | |
79 | ||
6acc369a | 80 | static DEFINE_MUTEX(hdaps_mtx); |
860e1d6b RL |
81 | |
82 | /* | |
6acc369a | 83 | * __get_latch - Get the value from a given port. Callers must hold hdaps_mtx. |
860e1d6b RL |
84 | */ |
85 | static inline u8 __get_latch(u16 port) | |
86 | { | |
393ad299 | 87 | return inb(port) & 0xff; |
860e1d6b RL |
88 | } |
89 | ||
90 | /* | |
393ad299 | 91 | * __check_latch - Check a port latch for a given value. Returns zero if the |
6acc369a | 92 | * port contains the given value. Callers must hold hdaps_mtx. |
860e1d6b | 93 | */ |
393ad299 | 94 | static inline int __check_latch(u16 port, u8 val) |
860e1d6b RL |
95 | { |
96 | if (__get_latch(port) == val) | |
97 | return 0; | |
98 | return -EINVAL; | |
99 | } | |
100 | ||
101 | /* | |
102 | * __wait_latch - Wait up to 100us for a port latch to get a certain value, | |
6acc369a | 103 | * returning zero if the value is obtained. Callers must hold hdaps_mtx. |
860e1d6b | 104 | */ |
393ad299 | 105 | static int __wait_latch(u16 port, u8 val) |
860e1d6b RL |
106 | { |
107 | unsigned int i; | |
108 | ||
109 | for (i = 0; i < 20; i++) { | |
110 | if (!__check_latch(port, val)) | |
111 | return 0; | |
112 | udelay(5); | |
113 | } | |
114 | ||
393ad299 | 115 | return -EIO; |
860e1d6b RL |
116 | } |
117 | ||
118 | /* | |
393ad299 | 119 | * __device_refresh - request a refresh from the accelerometer. Does not wait |
6acc369a | 120 | * for refresh to complete. Callers must hold hdaps_mtx. |
860e1d6b | 121 | */ |
393ad299 | 122 | static void __device_refresh(void) |
860e1d6b | 123 | { |
393ad299 RL |
124 | udelay(200); |
125 | if (inb(0x1604) != STATE_FRESH) { | |
126 | outb(0x11, 0x1610); | |
127 | outb(0x01, 0x161f); | |
128 | } | |
129 | } | |
860e1d6b | 130 | |
393ad299 RL |
131 | /* |
132 | * __device_refresh_sync - request a synchronous refresh from the | |
133 | * accelerometer. We wait for the refresh to complete. Returns zero if | |
6acc369a | 134 | * successful and nonzero on error. Callers must hold hdaps_mtx. |
393ad299 RL |
135 | */ |
136 | static int __device_refresh_sync(void) | |
137 | { | |
138 | __device_refresh(); | |
860e1d6b RL |
139 | return __wait_latch(0x1604, STATE_FRESH); |
140 | } | |
141 | ||
142 | /* | |
393ad299 | 143 | * __device_complete - indicate to the accelerometer that we are done reading |
6acc369a | 144 | * data, and then initiate an async refresh. Callers must hold hdaps_mtx. |
860e1d6b RL |
145 | */ |
146 | static inline void __device_complete(void) | |
147 | { | |
148 | inb(0x161f); | |
149 | inb(0x1604); | |
393ad299 | 150 | __device_refresh(); |
860e1d6b RL |
151 | } |
152 | ||
153 | /* | |
154 | * hdaps_readb_one - reads a byte from a single I/O port, placing the value in | |
155 | * the given pointer. Returns zero on success or a negative error on failure. | |
156 | * Can sleep. | |
157 | */ | |
158 | static int hdaps_readb_one(unsigned int port, u8 *val) | |
159 | { | |
160 | int ret; | |
161 | ||
6acc369a | 162 | mutex_lock(&hdaps_mtx); |
860e1d6b | 163 | |
393ad299 RL |
164 | /* do a sync refresh -- we need to be sure that we read fresh data */ |
165 | ret = __device_refresh_sync(); | |
166 | if (ret) | |
167 | goto out; | |
168 | ||
169 | *val = inb(port); | |
170 | __device_complete(); | |
171 | ||
172 | out: | |
6acc369a | 173 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
174 | return ret; |
175 | } | |
176 | ||
393ad299 | 177 | /* __hdaps_read_pair - internal lockless helper for hdaps_read_pair(). */ |
860e1d6b RL |
178 | static int __hdaps_read_pair(unsigned int port1, unsigned int port2, |
179 | int *x, int *y) | |
180 | { | |
181 | /* do a sync refresh -- we need to be sure that we read fresh data */ | |
393ad299 | 182 | if (__device_refresh_sync()) |
860e1d6b RL |
183 | return -EIO; |
184 | ||
185 | *y = inw(port2); | |
186 | *x = inw(port1); | |
187 | km_activity = inb(HDAPS_PORT_KMACT); | |
188 | __device_complete(); | |
189 | ||
2b8cf3e8 FS |
190 | /* hdaps_invert is a bitvector to negate the axes */ |
191 | if (hdaps_invert & HDAPS_X_AXIS) | |
860e1d6b | 192 | *x = -*x; |
2b8cf3e8 | 193 | if (hdaps_invert & HDAPS_Y_AXIS) |
860e1d6b | 194 | *y = -*y; |
860e1d6b RL |
195 | |
196 | return 0; | |
197 | } | |
198 | ||
199 | /* | |
200 | * hdaps_read_pair - reads the values from a pair of ports, placing the values | |
201 | * in the given pointers. Returns zero on success. Can sleep. | |
202 | */ | |
203 | static int hdaps_read_pair(unsigned int port1, unsigned int port2, | |
204 | int *val1, int *val2) | |
205 | { | |
206 | int ret; | |
207 | ||
6acc369a | 208 | mutex_lock(&hdaps_mtx); |
860e1d6b | 209 | ret = __hdaps_read_pair(port1, port2, val1, val2); |
6acc369a | 210 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
211 | |
212 | return ret; | |
213 | } | |
214 | ||
393ad299 RL |
215 | /* |
216 | * hdaps_device_init - initialize the accelerometer. Returns zero on success | |
217 | * and negative error code on failure. Can sleep. | |
218 | */ | |
860e1d6b RL |
219 | static int hdaps_device_init(void) |
220 | { | |
393ad299 | 221 | int total, ret = -ENXIO; |
860e1d6b | 222 | |
6acc369a | 223 | mutex_lock(&hdaps_mtx); |
860e1d6b RL |
224 | |
225 | outb(0x13, 0x1610); | |
226 | outb(0x01, 0x161f); | |
227 | if (__wait_latch(0x161f, 0x00)) | |
228 | goto out; | |
229 | ||
230 | /* | |
393ad299 RL |
231 | * Most ThinkPads return 0x01. |
232 | * | |
233 | * Others--namely the R50p, T41p, and T42p--return 0x03. These laptops | |
234 | * have "inverted" axises. | |
860e1d6b RL |
235 | * |
236 | * The 0x02 value occurs when the chip has been previously initialized. | |
237 | */ | |
238 | if (__check_latch(0x1611, 0x03) && | |
239 | __check_latch(0x1611, 0x02) && | |
240 | __check_latch(0x1611, 0x01)) | |
241 | goto out; | |
242 | ||
611f5763 | 243 | printk(KERN_DEBUG "hdaps: initial latch check good (0x%02x)\n", |
860e1d6b RL |
244 | __get_latch(0x1611)); |
245 | ||
246 | outb(0x17, 0x1610); | |
247 | outb(0x81, 0x1611); | |
248 | outb(0x01, 0x161f); | |
249 | if (__wait_latch(0x161f, 0x00)) | |
250 | goto out; | |
251 | if (__wait_latch(0x1611, 0x00)) | |
252 | goto out; | |
253 | if (__wait_latch(0x1612, 0x60)) | |
254 | goto out; | |
255 | if (__wait_latch(0x1613, 0x00)) | |
256 | goto out; | |
257 | outb(0x14, 0x1610); | |
258 | outb(0x01, 0x1611); | |
259 | outb(0x01, 0x161f); | |
260 | if (__wait_latch(0x161f, 0x00)) | |
261 | goto out; | |
262 | outb(0x10, 0x1610); | |
263 | outb(0xc8, 0x1611); | |
264 | outb(0x00, 0x1612); | |
265 | outb(0x02, 0x1613); | |
266 | outb(0x01, 0x161f); | |
267 | if (__wait_latch(0x161f, 0x00)) | |
268 | goto out; | |
393ad299 | 269 | if (__device_refresh_sync()) |
860e1d6b RL |
270 | goto out; |
271 | if (__wait_latch(0x1611, 0x00)) | |
272 | goto out; | |
273 | ||
274 | /* we have done our dance, now let's wait for the applause */ | |
393ad299 RL |
275 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
276 | int x, y; | |
860e1d6b RL |
277 | |
278 | /* a read of the device helps push it into action */ | |
393ad299 | 279 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); |
860e1d6b RL |
280 | if (!__wait_latch(0x1611, 0x02)) { |
281 | ret = 0; | |
282 | break; | |
283 | } | |
284 | ||
285 | msleep(INIT_WAIT_MSECS); | |
860e1d6b RL |
286 | } |
287 | ||
288 | out: | |
6acc369a | 289 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
290 | return ret; |
291 | } | |
292 | ||
293 | ||
860e1d6b RL |
294 | /* Device model stuff */ |
295 | ||
3ae5eaec | 296 | static int hdaps_probe(struct platform_device *dev) |
860e1d6b RL |
297 | { |
298 | int ret; | |
299 | ||
300 | ret = hdaps_device_init(); | |
301 | if (ret) | |
302 | return ret; | |
303 | ||
611f5763 | 304 | pr_info("device successfully initialized\n"); |
860e1d6b RL |
305 | return 0; |
306 | } | |
307 | ||
3567a4e2 | 308 | #ifdef CONFIG_PM_SLEEP |
e25d5c11 | 309 | static int hdaps_resume(struct device *dev) |
860e1d6b | 310 | { |
9480e307 | 311 | return hdaps_device_init(); |
860e1d6b | 312 | } |
3567a4e2 | 313 | #endif |
860e1d6b | 314 | |
e25d5c11 RW |
315 | static SIMPLE_DEV_PM_OPS(hdaps_pm, NULL, hdaps_resume); |
316 | ||
3ae5eaec | 317 | static struct platform_driver hdaps_driver = { |
860e1d6b | 318 | .probe = hdaps_probe, |
3ae5eaec RK |
319 | .driver = { |
320 | .name = "hdaps", | |
e25d5c11 | 321 | .pm = &hdaps_pm, |
3ae5eaec | 322 | }, |
860e1d6b RL |
323 | }; |
324 | ||
393ad299 | 325 | /* |
6acc369a | 326 | * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_mtx. |
393ad299 RL |
327 | */ |
328 | static void hdaps_calibrate(void) | |
329 | { | |
330 | __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &rest_x, &rest_y); | |
331 | } | |
332 | ||
aefca8ba | 333 | static void hdaps_mousedev_poll(struct input_polled_dev *dev) |
393ad299 | 334 | { |
aefca8ba | 335 | struct input_dev *input_dev = dev->input; |
393ad299 RL |
336 | int x, y; |
337 | ||
aefca8ba | 338 | mutex_lock(&hdaps_mtx); |
393ad299 RL |
339 | |
340 | if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y)) | |
341 | goto out; | |
342 | ||
aefca8ba DT |
343 | input_report_abs(input_dev, ABS_X, x - rest_x); |
344 | input_report_abs(input_dev, ABS_Y, y - rest_y); | |
345 | input_sync(input_dev); | |
393ad299 RL |
346 | |
347 | out: | |
6acc369a | 348 | mutex_unlock(&hdaps_mtx); |
393ad299 RL |
349 | } |
350 | ||
860e1d6b RL |
351 | |
352 | /* Sysfs Files */ | |
353 | ||
354 | static ssize_t hdaps_position_show(struct device *dev, | |
355 | struct device_attribute *attr, char *buf) | |
356 | { | |
357 | int ret, x, y; | |
358 | ||
359 | ret = hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y); | |
360 | if (ret) | |
361 | return ret; | |
362 | ||
363 | return sprintf(buf, "(%d,%d)\n", x, y); | |
364 | } | |
365 | ||
366 | static ssize_t hdaps_variance_show(struct device *dev, | |
367 | struct device_attribute *attr, char *buf) | |
368 | { | |
369 | int ret, x, y; | |
370 | ||
371 | ret = hdaps_read_pair(HDAPS_PORT_XVAR, HDAPS_PORT_YVAR, &x, &y); | |
372 | if (ret) | |
373 | return ret; | |
374 | ||
375 | return sprintf(buf, "(%d,%d)\n", x, y); | |
376 | } | |
377 | ||
378 | static ssize_t hdaps_temp1_show(struct device *dev, | |
379 | struct device_attribute *attr, char *buf) | |
380 | { | |
b94e88bc | 381 | u8 uninitialized_var(temp); |
860e1d6b RL |
382 | int ret; |
383 | ||
384 | ret = hdaps_readb_one(HDAPS_PORT_TEMP1, &temp); | |
a938406b | 385 | if (ret) |
860e1d6b RL |
386 | return ret; |
387 | ||
388 | return sprintf(buf, "%u\n", temp); | |
389 | } | |
390 | ||
391 | static ssize_t hdaps_temp2_show(struct device *dev, | |
392 | struct device_attribute *attr, char *buf) | |
393 | { | |
b94e88bc | 394 | u8 uninitialized_var(temp); |
860e1d6b RL |
395 | int ret; |
396 | ||
397 | ret = hdaps_readb_one(HDAPS_PORT_TEMP2, &temp); | |
a938406b | 398 | if (ret) |
860e1d6b RL |
399 | return ret; |
400 | ||
401 | return sprintf(buf, "%u\n", temp); | |
402 | } | |
403 | ||
404 | static ssize_t hdaps_keyboard_activity_show(struct device *dev, | |
405 | struct device_attribute *attr, | |
406 | char *buf) | |
407 | { | |
408 | return sprintf(buf, "%u\n", KEYBD_ISSET(km_activity)); | |
409 | } | |
410 | ||
411 | static ssize_t hdaps_mouse_activity_show(struct device *dev, | |
412 | struct device_attribute *attr, | |
413 | char *buf) | |
414 | { | |
415 | return sprintf(buf, "%u\n", MOUSE_ISSET(km_activity)); | |
416 | } | |
417 | ||
418 | static ssize_t hdaps_calibrate_show(struct device *dev, | |
419 | struct device_attribute *attr, char *buf) | |
420 | { | |
421 | return sprintf(buf, "(%d,%d)\n", rest_x, rest_y); | |
422 | } | |
423 | ||
424 | static ssize_t hdaps_calibrate_store(struct device *dev, | |
425 | struct device_attribute *attr, | |
426 | const char *buf, size_t count) | |
427 | { | |
6acc369a | 428 | mutex_lock(&hdaps_mtx); |
860e1d6b | 429 | hdaps_calibrate(); |
6acc369a | 430 | mutex_unlock(&hdaps_mtx); |
860e1d6b RL |
431 | |
432 | return count; | |
433 | } | |
434 | ||
435 | static ssize_t hdaps_invert_show(struct device *dev, | |
436 | struct device_attribute *attr, char *buf) | |
437 | { | |
438 | return sprintf(buf, "%u\n", hdaps_invert); | |
439 | } | |
440 | ||
441 | static ssize_t hdaps_invert_store(struct device *dev, | |
442 | struct device_attribute *attr, | |
443 | const char *buf, size_t count) | |
444 | { | |
445 | int invert; | |
446 | ||
2b8cf3e8 FS |
447 | if (sscanf(buf, "%d", &invert) != 1 || |
448 | invert < 0 || invert > HDAPS_BOTH_AXES) | |
860e1d6b RL |
449 | return -EINVAL; |
450 | ||
451 | hdaps_invert = invert; | |
452 | hdaps_calibrate(); | |
453 | ||
454 | return count; | |
455 | } | |
456 | ||
860e1d6b RL |
457 | static DEVICE_ATTR(position, 0444, hdaps_position_show, NULL); |
458 | static DEVICE_ATTR(variance, 0444, hdaps_variance_show, NULL); | |
459 | static DEVICE_ATTR(temp1, 0444, hdaps_temp1_show, NULL); | |
460 | static DEVICE_ATTR(temp2, 0444, hdaps_temp2_show, NULL); | |
461 | static DEVICE_ATTR(keyboard_activity, 0444, hdaps_keyboard_activity_show, NULL); | |
462 | static DEVICE_ATTR(mouse_activity, 0444, hdaps_mouse_activity_show, NULL); | |
463 | static DEVICE_ATTR(calibrate, 0644, hdaps_calibrate_show,hdaps_calibrate_store); | |
464 | static DEVICE_ATTR(invert, 0644, hdaps_invert_show, hdaps_invert_store); | |
860e1d6b RL |
465 | |
466 | static struct attribute *hdaps_attributes[] = { | |
467 | &dev_attr_position.attr, | |
468 | &dev_attr_variance.attr, | |
469 | &dev_attr_temp1.attr, | |
470 | &dev_attr_temp2.attr, | |
471 | &dev_attr_keyboard_activity.attr, | |
472 | &dev_attr_mouse_activity.attr, | |
473 | &dev_attr_calibrate.attr, | |
860e1d6b RL |
474 | &dev_attr_invert.attr, |
475 | NULL, | |
476 | }; | |
477 | ||
478 | static struct attribute_group hdaps_attribute_group = { | |
479 | .attrs = hdaps_attributes, | |
480 | }; | |
481 | ||
482 | ||
483 | /* Module stuff */ | |
484 | ||
4c87b74c | 485 | /* hdaps_dmi_match - found a match. return one, short-circuiting the hunt. */ |
1855256c | 486 | static int __init hdaps_dmi_match(const struct dmi_system_id *id) |
860e1d6b | 487 | { |
611f5763 | 488 | pr_info("%s detected\n", id->ident); |
4c87b74c | 489 | return 1; |
860e1d6b RL |
490 | } |
491 | ||
4c87b74c | 492 | /* hdaps_dmi_match_invert - found an inverted match. */ |
1855256c | 493 | static int __init hdaps_dmi_match_invert(const struct dmi_system_id *id) |
860e1d6b | 494 | { |
2b8cf3e8 | 495 | hdaps_invert = (unsigned long)id->driver_data; |
611f5763 | 496 | pr_info("inverting axis (%u) readings\n", hdaps_invert); |
4c87b74c | 497 | return hdaps_dmi_match(id); |
860e1d6b RL |
498 | } |
499 | ||
2b8cf3e8 | 500 | #define HDAPS_DMI_MATCH_INVERT(vendor, model, axes) { \ |
509a5e85 | 501 | .ident = vendor " " model, \ |
860e1d6b | 502 | .callback = hdaps_dmi_match_invert, \ |
2b8cf3e8 | 503 | .driver_data = (void *)axes, \ |
860e1d6b | 504 | .matches = { \ |
509a5e85 | 505 | DMI_MATCH(DMI_BOARD_VENDOR, vendor), \ |
860e1d6b RL |
506 | DMI_MATCH(DMI_PRODUCT_VERSION, model) \ |
507 | } \ | |
508 | } | |
509 | ||
2b8cf3e8 FS |
510 | #define HDAPS_DMI_MATCH_NORMAL(vendor, model) \ |
511 | HDAPS_DMI_MATCH_INVERT(vendor, model, 0) | |
512 | ||
509a5e85 | 513 | /* Note that HDAPS_DMI_MATCH_NORMAL("ThinkPad T42") would match |
0f23e50a SB |
514 | "ThinkPad T42p", so the order of the entries matters. |
515 | If your ThinkPad is not recognized, please update to latest | |
516 | BIOS. This is especially the case for some R52 ThinkPads. */ | |
509a5e85 | 517 | static struct dmi_system_id __initdata hdaps_whitelist[] = { |
2b8cf3e8 | 518 | HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad R50p", HDAPS_BOTH_AXES), |
509a5e85 JD |
519 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R50"), |
520 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R51"), | |
521 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R52"), | |
2b8cf3e8 FS |
522 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad R61i", HDAPS_BOTH_AXES), |
523 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad R61", HDAPS_BOTH_AXES), | |
524 | HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T41p", HDAPS_BOTH_AXES), | |
509a5e85 | 525 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T41"), |
2b8cf3e8 | 526 | HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T42p", HDAPS_BOTH_AXES), |
509a5e85 JD |
527 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T42"), |
528 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T43"), | |
5f1209a1 | 529 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T400", HDAPS_BOTH_AXES), |
2b8cf3e8 FS |
530 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T60", HDAPS_BOTH_AXES), |
531 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61p", HDAPS_BOTH_AXES), | |
532 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61", HDAPS_BOTH_AXES), | |
509a5e85 | 533 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad X40"), |
b6a33fe2 | 534 | HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad X41", HDAPS_Y_AXIS), |
2b8cf3e8 FS |
535 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X60", HDAPS_BOTH_AXES), |
536 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X61s", HDAPS_BOTH_AXES), | |
537 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X61", HDAPS_BOTH_AXES), | |
509a5e85 | 538 | HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad Z60m"), |
2b8cf3e8 FS |
539 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad Z61m", HDAPS_BOTH_AXES), |
540 | HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad Z61p", HDAPS_BOTH_AXES), | |
509a5e85 JD |
541 | { .ident = NULL } |
542 | }; | |
0f6c840d | 543 | |
860e1d6b RL |
544 | static int __init hdaps_init(void) |
545 | { | |
aefca8ba | 546 | struct input_dev *idev; |
860e1d6b RL |
547 | int ret; |
548 | ||
860e1d6b | 549 | if (!dmi_check_system(hdaps_whitelist)) { |
611f5763 | 550 | pr_warn("supported laptop not found!\n"); |
b3f28a9a | 551 | ret = -ENODEV; |
860e1d6b RL |
552 | goto out; |
553 | } | |
554 | ||
555 | if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "hdaps")) { | |
556 | ret = -ENXIO; | |
557 | goto out; | |
558 | } | |
559 | ||
3ae5eaec | 560 | ret = platform_driver_register(&hdaps_driver); |
860e1d6b RL |
561 | if (ret) |
562 | goto out_region; | |
563 | ||
564 | pdev = platform_device_register_simple("hdaps", -1, NULL, 0); | |
565 | if (IS_ERR(pdev)) { | |
566 | ret = PTR_ERR(pdev); | |
567 | goto out_driver; | |
568 | } | |
569 | ||
570 | ret = sysfs_create_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
571 | if (ret) | |
572 | goto out_device; | |
573 | ||
aefca8ba | 574 | hdaps_idev = input_allocate_polled_device(); |
d12eb7e1 DT |
575 | if (!hdaps_idev) { |
576 | ret = -ENOMEM; | |
577 | goto out_group; | |
578 | } | |
579 | ||
aefca8ba DT |
580 | hdaps_idev->poll = hdaps_mousedev_poll; |
581 | hdaps_idev->poll_interval = HDAPS_POLL_INTERVAL; | |
582 | ||
393ad299 RL |
583 | /* initial calibrate for the input device */ |
584 | hdaps_calibrate(); | |
585 | ||
586 | /* initialize the input class */ | |
aefca8ba DT |
587 | idev = hdaps_idev->input; |
588 | idev->name = "hdaps"; | |
d2fc60d6 DT |
589 | idev->phys = "isa1600/input0"; |
590 | idev->id.bustype = BUS_ISA; | |
aefca8ba | 591 | idev->dev.parent = &pdev->dev; |
7b19ada2 | 592 | idev->evbit[0] = BIT_MASK(EV_ABS); |
aefca8ba | 593 | input_set_abs_params(idev, ABS_X, |
d12eb7e1 | 594 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); |
aefca8ba | 595 | input_set_abs_params(idev, ABS_Y, |
d12eb7e1 DT |
596 | -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT); |
597 | ||
aefca8ba | 598 | ret = input_register_polled_device(hdaps_idev); |
b25a1063 DT |
599 | if (ret) |
600 | goto out_idev; | |
393ad299 | 601 | |
611f5763 | 602 | pr_info("driver successfully loaded\n"); |
860e1d6b RL |
603 | return 0; |
604 | ||
b25a1063 | 605 | out_idev: |
aefca8ba | 606 | input_free_polled_device(hdaps_idev); |
d12eb7e1 DT |
607 | out_group: |
608 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); | |
860e1d6b RL |
609 | out_device: |
610 | platform_device_unregister(pdev); | |
611 | out_driver: | |
3ae5eaec | 612 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
613 | out_region: |
614 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); | |
615 | out: | |
611f5763 | 616 | pr_warn("driver init failed (ret=%d)!\n", ret); |
860e1d6b RL |
617 | return ret; |
618 | } | |
619 | ||
620 | static void __exit hdaps_exit(void) | |
621 | { | |
aefca8ba DT |
622 | input_unregister_polled_device(hdaps_idev); |
623 | input_free_polled_device(hdaps_idev); | |
860e1d6b RL |
624 | sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group); |
625 | platform_device_unregister(pdev); | |
3ae5eaec | 626 | platform_driver_unregister(&hdaps_driver); |
860e1d6b RL |
627 | release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS); |
628 | ||
611f5763 | 629 | pr_info("driver unloaded\n"); |
860e1d6b RL |
630 | } |
631 | ||
632 | module_init(hdaps_init); | |
633 | module_exit(hdaps_exit); | |
634 | ||
2b8cf3e8 FS |
635 | module_param_named(invert, hdaps_invert, int, 0); |
636 | MODULE_PARM_DESC(invert, "invert data along each axis. 1 invert x-axis, " | |
637 | "2 invert y-axis, 3 invert both axes."); | |
860e1d6b RL |
638 | |
639 | MODULE_AUTHOR("Robert Love"); | |
640 | MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver"); | |
641 | MODULE_LICENSE("GPL v2"); |