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