Commit | Line | Data |
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455fbdd3 PM |
1 | /* |
2 | * lis3lv02d.c - ST LIS3LV02DL accelerometer driver | |
3 | * | |
4 | * Copyright (C) 2007-2008 Yan Burman | |
5 | * Copyright (C) 2008 Eric Piel | |
ef2cfc79 | 6 | * Copyright (C) 2008-2009 Pavel Machek |
455fbdd3 PM |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/dmi.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/interrupt.h> | |
dc6ea97b | 30 | #include <linux/input-polldev.h> |
455fbdd3 PM |
31 | #include <linux/delay.h> |
32 | #include <linux/wait.h> | |
33 | #include <linux/poll.h> | |
34 | #include <linux/freezer.h> | |
455fbdd3 | 35 | #include <linux/uaccess.h> |
ef2cfc79 | 36 | #include <linux/miscdevice.h> |
455fbdd3 PM |
37 | #include <asm/atomic.h> |
38 | #include "lis3lv02d.h" | |
39 | ||
40 | #define DRIVER_NAME "lis3lv02d" | |
455fbdd3 PM |
41 | |
42 | /* joystick device poll interval in milliseconds */ | |
43 | #define MDPS_POLL_INTERVAL 50 | |
4a70a413 SO |
44 | #define MDPS_POLL_MIN 0 |
45 | #define MDPS_POLL_MAX 2000 | |
455fbdd3 PM |
46 | /* |
47 | * The sensor can also generate interrupts (DRDY) but it's pretty pointless | |
bc62c147 | 48 | * because they are generated even if the data do not change. So it's better |
455fbdd3 PM |
49 | * to keep the interrupt for the free-fall event. The values are updated at |
50 | * 40Hz (at the lowest frequency), but as it can be pretty time consuming on | |
51 | * some low processor, we poll the sensor only at 20Hz... enough for the | |
52 | * joystick. | |
53 | */ | |
54 | ||
641615ab SO |
55 | #define LIS3_PWRON_DELAY_WAI_12B (5000) |
56 | #define LIS3_PWRON_DELAY_WAI_8B (3000) | |
57 | ||
32496c76 SO |
58 | /* |
59 | * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG | |
60 | * LIS302D spec says: 18 mG / digit | |
61 | * LIS3_ACCURACY is used to increase accuracy of the intermediate | |
62 | * calculation results. | |
63 | */ | |
64 | #define LIS3_ACCURACY 1024 | |
65 | /* Sensitivity values for -2G +2G scale */ | |
66 | #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024) | |
67 | #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY) | |
68 | ||
69 | #define LIS3_DEFAULT_FUZZ 3 | |
70 | #define LIS3_DEFAULT_FLAT 3 | |
71 | ||
a38da2ed | 72 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 73 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 PM |
74 | }; |
75 | ||
be84cfc5 | 76 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 77 | |
a38da2ed DM |
78 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
79 | { | |
80 | s8 lo; | |
81 | if (lis3->read(lis3, reg, &lo) < 0) | |
82 | return 0; | |
83 | ||
84 | return lo; | |
85 | } | |
86 | ||
bc62c147 | 87 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
88 | { |
89 | u8 lo, hi; | |
90 | ||
a38da2ed DM |
91 | lis3->read(lis3, reg - 1, &lo); |
92 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
93 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
94 | return (s16)((hi << 8) | lo); | |
95 | } | |
96 | ||
455fbdd3 PM |
97 | /** |
98 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
99 | * @axis: 1,2,3 - can also be negative | |
100 | * @hw_values: raw values returned by the hardware | |
101 | * | |
102 | * Returns the converted value. | |
103 | */ | |
104 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
105 | { | |
106 | if (axis > 0) | |
107 | return hw_values[axis - 1]; | |
108 | else | |
109 | return -hw_values[-axis - 1]; | |
110 | } | |
111 | ||
112 | /** | |
113 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
a38da2ed DM |
114 | * @lis3: pointer to the device struct |
115 | * @x: where to store the X axis value | |
116 | * @y: where to store the Y axis value | |
117 | * @z: where to store the Z axis value | |
455fbdd3 PM |
118 | * |
119 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
120 | */ | |
a38da2ed | 121 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
122 | { |
123 | int position[3]; | |
32496c76 | 124 | int i; |
455fbdd3 | 125 | |
a002ee89 EP |
126 | position[0] = lis3->read_data(lis3, OUTX); |
127 | position[1] = lis3->read_data(lis3, OUTY); | |
128 | position[2] = lis3->read_data(lis3, OUTZ); | |
455fbdd3 | 129 | |
32496c76 SO |
130 | for (i = 0; i < 3; i++) |
131 | position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY; | |
132 | ||
a002ee89 EP |
133 | *x = lis3lv02d_get_axis(lis3->ac.x, position); |
134 | *y = lis3lv02d_get_axis(lis3->ac.y, position); | |
135 | *z = lis3lv02d_get_axis(lis3->ac.z, position); | |
455fbdd3 PM |
136 | } |
137 | ||
641615ab SO |
138 | /* conversion btw sampling rate and the register values */ |
139 | static int lis3_12_rates[4] = {40, 160, 640, 2560}; | |
140 | static int lis3_8_rates[2] = {100, 400}; | |
141 | ||
a253aaef | 142 | /* ODR is Output Data Rate */ |
641615ab SO |
143 | static int lis3lv02d_get_odr(void) |
144 | { | |
145 | u8 ctrl; | |
a253aaef | 146 | int shift; |
641615ab SO |
147 | |
148 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); | |
a253aaef SO |
149 | ctrl &= lis3_dev.odr_mask; |
150 | shift = ffs(lis3_dev.odr_mask) - 1; | |
151 | return lis3_dev.odrs[(ctrl >> shift)]; | |
152 | } | |
641615ab | 153 | |
a253aaef SO |
154 | static int lis3lv02d_set_odr(int rate) |
155 | { | |
156 | u8 ctrl; | |
157 | int i, len, shift; | |
158 | ||
159 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); | |
160 | ctrl &= ~lis3_dev.odr_mask; | |
161 | len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */ | |
162 | shift = ffs(lis3_dev.odr_mask) - 1; | |
163 | ||
164 | for (i = 0; i < len; i++) | |
165 | if (lis3_dev.odrs[i] == rate) { | |
166 | lis3_dev.write(&lis3_dev, CTRL_REG1, | |
167 | ctrl | (i << shift)); | |
168 | return 0; | |
169 | } | |
170 | return -EINVAL; | |
641615ab SO |
171 | } |
172 | ||
2db4a76d SO |
173 | static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
174 | { | |
175 | u8 reg; | |
176 | s16 x, y, z; | |
177 | u8 selftest; | |
178 | int ret; | |
179 | ||
180 | mutex_lock(&lis3->mutex); | |
181 | if (lis3_dev.whoami == WAI_12B) | |
182 | selftest = CTRL1_ST; | |
183 | else | |
184 | selftest = CTRL1_STP; | |
185 | ||
186 | lis3->read(lis3, CTRL_REG1, ®); | |
187 | lis3->write(lis3, CTRL_REG1, (reg | selftest)); | |
188 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
189 | ||
190 | /* Read directly to avoid axis remap */ | |
191 | x = lis3->read_data(lis3, OUTX); | |
192 | y = lis3->read_data(lis3, OUTY); | |
193 | z = lis3->read_data(lis3, OUTZ); | |
194 | ||
195 | /* back to normal settings */ | |
196 | lis3->write(lis3, CTRL_REG1, reg); | |
197 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
198 | ||
199 | results[0] = x - lis3->read_data(lis3, OUTX); | |
200 | results[1] = y - lis3->read_data(lis3, OUTY); | |
201 | results[2] = z - lis3->read_data(lis3, OUTZ); | |
202 | ||
203 | ret = 0; | |
204 | if (lis3->pdata) { | |
205 | int i; | |
206 | for (i = 0; i < 3; i++) { | |
207 | /* Check against selftest acceptance limits */ | |
208 | if ((results[i] < lis3->pdata->st_min_limits[i]) || | |
209 | (results[i] > lis3->pdata->st_max_limits[i])) { | |
210 | ret = -EIO; | |
211 | goto fail; | |
212 | } | |
213 | } | |
214 | } | |
215 | ||
216 | /* test passed */ | |
217 | fail: | |
218 | mutex_unlock(&lis3->mutex); | |
219 | return ret; | |
220 | } | |
221 | ||
a38da2ed | 222 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
455fbdd3 | 223 | { |
a002ee89 EP |
224 | /* disable X,Y,Z axis and power down */ |
225 | lis3->write(lis3, CTRL_REG1, 0x00); | |
455fbdd3 | 226 | } |
cfce41a6 | 227 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
455fbdd3 | 228 | |
a38da2ed | 229 | void lis3lv02d_poweron(struct lis3lv02d *lis3) |
455fbdd3 | 230 | { |
a002ee89 | 231 | u8 reg; |
455fbdd3 | 232 | |
a002ee89 | 233 | lis3->init(lis3); |
455fbdd3 | 234 | |
641615ab SO |
235 | /* LIS3 power on delay is quite long */ |
236 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
237 | ||
a002ee89 EP |
238 | /* |
239 | * Common configuration | |
4b5d95b3 ÉP |
240 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
241 | * both have been read. So the value read will always be correct. | |
a002ee89 | 242 | */ |
4b5d95b3 ÉP |
243 | if (lis3->whoami == WAI_12B) { |
244 | lis3->read(lis3, CTRL_REG2, ®); | |
245 | reg |= CTRL2_BDU; | |
246 | lis3->write(lis3, CTRL_REG2, reg); | |
247 | } | |
455fbdd3 | 248 | } |
a002ee89 EP |
249 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
250 | ||
455fbdd3 | 251 | |
6d94d408 SO |
252 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
253 | { | |
254 | int x, y, z; | |
255 | ||
256 | mutex_lock(&lis3_dev.mutex); | |
257 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); | |
258 | input_report_abs(pidev->input, ABS_X, x); | |
259 | input_report_abs(pidev->input, ABS_Y, y); | |
260 | input_report_abs(pidev->input, ABS_Z, z); | |
261 | input_sync(pidev->input); | |
262 | mutex_unlock(&lis3_dev.mutex); | |
263 | } | |
264 | ||
ef2cfc79 PM |
265 | static irqreturn_t lis302dl_interrupt(int irq, void *dummy) |
266 | { | |
92ba4fe4 SO |
267 | if (!test_bit(0, &lis3_dev.misc_opened)) |
268 | goto out; | |
269 | ||
ef2cfc79 PM |
270 | /* |
271 | * Be careful: on some HP laptops the bios force DD when on battery and | |
272 | * the lid is closed. This leads to interrupts as soon as a little move | |
273 | * is done. | |
274 | */ | |
be84cfc5 | 275 | atomic_inc(&lis3_dev.count); |
ef2cfc79 | 276 | |
be84cfc5 PM |
277 | wake_up_interruptible(&lis3_dev.misc_wait); |
278 | kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); | |
92ba4fe4 SO |
279 | out: |
280 | if (lis3_dev.whoami == WAI_8B && lis3_dev.idev && | |
281 | lis3_dev.idev->input->users) | |
282 | return IRQ_WAKE_THREAD; | |
ef2cfc79 PM |
283 | return IRQ_HANDLED; |
284 | } | |
285 | ||
6d94d408 SO |
286 | static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) |
287 | { | |
288 | struct input_dev *dev = lis3->idev->input; | |
289 | u8 click_src; | |
290 | ||
291 | mutex_lock(&lis3->mutex); | |
292 | lis3->read(lis3, CLICK_SRC, &click_src); | |
293 | ||
294 | if (click_src & CLICK_SINGLE_X) { | |
295 | input_report_key(dev, lis3->mapped_btns[0], 1); | |
296 | input_report_key(dev, lis3->mapped_btns[0], 0); | |
297 | } | |
298 | ||
299 | if (click_src & CLICK_SINGLE_Y) { | |
300 | input_report_key(dev, lis3->mapped_btns[1], 1); | |
301 | input_report_key(dev, lis3->mapped_btns[1], 0); | |
302 | } | |
303 | ||
304 | if (click_src & CLICK_SINGLE_Z) { | |
305 | input_report_key(dev, lis3->mapped_btns[2], 1); | |
306 | input_report_key(dev, lis3->mapped_btns[2], 0); | |
307 | } | |
308 | input_sync(dev); | |
309 | mutex_unlock(&lis3->mutex); | |
310 | } | |
311 | ||
312 | static void lis302dl_interrupt_handle_ff_wu(struct lis3lv02d *lis3) | |
313 | { | |
314 | u8 wu1_src; | |
315 | u8 wu2_src; | |
316 | ||
317 | lis3->read(lis3, FF_WU_SRC_1, &wu1_src); | |
318 | lis3->read(lis3, FF_WU_SRC_2, &wu2_src); | |
319 | ||
320 | wu1_src = wu1_src & FF_WU_SRC_IA ? wu1_src : 0; | |
321 | wu2_src = wu2_src & FF_WU_SRC_IA ? wu2_src : 0; | |
322 | ||
323 | /* joystick poll is internally protected by the lis3->mutex. */ | |
324 | if (wu1_src || wu2_src) | |
325 | lis3lv02d_joystick_poll(lis3_dev.idev); | |
326 | } | |
327 | ||
92ba4fe4 | 328 | static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) |
ef2cfc79 | 329 | { |
6d94d408 SO |
330 | |
331 | struct lis3lv02d *lis3 = data; | |
332 | ||
333 | if ((lis3->pdata->irq_cfg & LIS3_IRQ1_MASK) == LIS3_IRQ1_CLICK) | |
334 | lis302dl_interrupt_handle_click(lis3); | |
335 | else | |
336 | lis302dl_interrupt_handle_ff_wu(lis3); | |
337 | ||
92ba4fe4 SO |
338 | return IRQ_HANDLED; |
339 | } | |
ef2cfc79 | 340 | |
92ba4fe4 SO |
341 | static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) |
342 | { | |
6d94d408 SO |
343 | |
344 | struct lis3lv02d *lis3 = data; | |
345 | ||
346 | if ((lis3->pdata->irq_cfg & LIS3_IRQ2_MASK) == LIS3_IRQ2_CLICK) | |
347 | lis302dl_interrupt_handle_click(lis3); | |
348 | else | |
349 | lis302dl_interrupt_handle_ff_wu(lis3); | |
350 | ||
92ba4fe4 SO |
351 | return IRQ_HANDLED; |
352 | } | |
353 | ||
354 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
355 | { | |
be84cfc5 | 356 | if (test_and_set_bit(0, &lis3_dev.misc_opened)) |
ef2cfc79 PM |
357 | return -EBUSY; /* already open */ |
358 | ||
be84cfc5 | 359 | atomic_set(&lis3_dev.count, 0); |
ef2cfc79 PM |
360 | return 0; |
361 | } | |
362 | ||
363 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
364 | { | |
be84cfc5 | 365 | fasync_helper(-1, file, 0, &lis3_dev.async_queue); |
be84cfc5 | 366 | clear_bit(0, &lis3_dev.misc_opened); /* release the device */ |
ef2cfc79 PM |
367 | return 0; |
368 | } | |
369 | ||
370 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, | |
371 | size_t count, loff_t *pos) | |
372 | { | |
373 | DECLARE_WAITQUEUE(wait, current); | |
374 | u32 data; | |
375 | unsigned char byte_data; | |
376 | ssize_t retval = 1; | |
377 | ||
378 | if (count < 1) | |
379 | return -EINVAL; | |
380 | ||
be84cfc5 | 381 | add_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
382 | while (true) { |
383 | set_current_state(TASK_INTERRUPTIBLE); | |
be84cfc5 | 384 | data = atomic_xchg(&lis3_dev.count, 0); |
ef2cfc79 PM |
385 | if (data) |
386 | break; | |
387 | ||
388 | if (file->f_flags & O_NONBLOCK) { | |
389 | retval = -EAGAIN; | |
390 | goto out; | |
391 | } | |
392 | ||
393 | if (signal_pending(current)) { | |
394 | retval = -ERESTARTSYS; | |
395 | goto out; | |
396 | } | |
397 | ||
398 | schedule(); | |
399 | } | |
400 | ||
401 | if (data < 255) | |
402 | byte_data = data; | |
403 | else | |
404 | byte_data = 255; | |
405 | ||
406 | /* make sure we are not going into copy_to_user() with | |
407 | * TASK_INTERRUPTIBLE state */ | |
408 | set_current_state(TASK_RUNNING); | |
409 | if (copy_to_user(buf, &byte_data, sizeof(byte_data))) | |
410 | retval = -EFAULT; | |
411 | ||
412 | out: | |
413 | __set_current_state(TASK_RUNNING); | |
be84cfc5 | 414 | remove_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
415 | |
416 | return retval; | |
417 | } | |
418 | ||
419 | static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait) | |
420 | { | |
be84cfc5 PM |
421 | poll_wait(file, &lis3_dev.misc_wait, wait); |
422 | if (atomic_read(&lis3_dev.count)) | |
ef2cfc79 PM |
423 | return POLLIN | POLLRDNORM; |
424 | return 0; | |
425 | } | |
426 | ||
427 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) | |
428 | { | |
be84cfc5 | 429 | return fasync_helper(fd, file, on, &lis3_dev.async_queue); |
ef2cfc79 PM |
430 | } |
431 | ||
432 | static const struct file_operations lis3lv02d_misc_fops = { | |
433 | .owner = THIS_MODULE, | |
434 | .llseek = no_llseek, | |
435 | .read = lis3lv02d_misc_read, | |
436 | .open = lis3lv02d_misc_open, | |
437 | .release = lis3lv02d_misc_release, | |
438 | .poll = lis3lv02d_misc_poll, | |
439 | .fasync = lis3lv02d_misc_fasync, | |
440 | }; | |
441 | ||
442 | static struct miscdevice lis3lv02d_misc_device = { | |
443 | .minor = MISC_DYNAMIC_MINOR, | |
444 | .name = "freefall", | |
445 | .fops = &lis3lv02d_misc_fops, | |
446 | }; | |
447 | ||
cfce41a6 | 448 | int lis3lv02d_joystick_enable(void) |
455fbdd3 | 449 | { |
dc6ea97b | 450 | struct input_dev *input_dev; |
455fbdd3 | 451 | int err; |
32496c76 | 452 | int max_val, fuzz, flat; |
6d94d408 | 453 | int btns[] = {BTN_X, BTN_Y, BTN_Z}; |
455fbdd3 | 454 | |
be84cfc5 | 455 | if (lis3_dev.idev) |
455fbdd3 PM |
456 | return -EINVAL; |
457 | ||
dc6ea97b | 458 | lis3_dev.idev = input_allocate_polled_device(); |
be84cfc5 | 459 | if (!lis3_dev.idev) |
455fbdd3 PM |
460 | return -ENOMEM; |
461 | ||
dc6ea97b EP |
462 | lis3_dev.idev->poll = lis3lv02d_joystick_poll; |
463 | lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL; | |
4a70a413 SO |
464 | lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN; |
465 | lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX; | |
dc6ea97b EP |
466 | input_dev = lis3_dev.idev->input; |
467 | ||
dc6ea97b EP |
468 | input_dev->name = "ST LIS3LV02DL Accelerometer"; |
469 | input_dev->phys = DRIVER_NAME "/input0"; | |
470 | input_dev->id.bustype = BUS_HOST; | |
471 | input_dev->id.vendor = 0; | |
472 | input_dev->dev.parent = &lis3_dev.pdev->dev; | |
455fbdd3 | 473 | |
dc6ea97b | 474 | set_bit(EV_ABS, input_dev->evbit); |
32496c76 SO |
475 | max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY; |
476 | fuzz = (LIS3_DEFAULT_FUZZ * lis3_dev.scale) / LIS3_ACCURACY; | |
477 | flat = (LIS3_DEFAULT_FLAT * lis3_dev.scale) / LIS3_ACCURACY; | |
478 | input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat); | |
479 | input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat); | |
480 | input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat); | |
455fbdd3 | 481 | |
6d94d408 SO |
482 | lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns); |
483 | lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns); | |
484 | lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns); | |
485 | ||
dc6ea97b | 486 | err = input_register_polled_device(lis3_dev.idev); |
455fbdd3 | 487 | if (err) { |
dc6ea97b | 488 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 489 | lis3_dev.idev = NULL; |
455fbdd3 PM |
490 | } |
491 | ||
492 | return err; | |
493 | } | |
cfce41a6 | 494 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
455fbdd3 | 495 | |
cfce41a6 | 496 | void lis3lv02d_joystick_disable(void) |
455fbdd3 | 497 | { |
92ba4fe4 SO |
498 | if (lis3_dev.irq) |
499 | free_irq(lis3_dev.irq, &lis3_dev); | |
500 | if (lis3_dev.pdata && lis3_dev.pdata->irq2) | |
501 | free_irq(lis3_dev.pdata->irq2, &lis3_dev); | |
502 | ||
be84cfc5 | 503 | if (!lis3_dev.idev) |
455fbdd3 PM |
504 | return; |
505 | ||
c2884242 EP |
506 | if (lis3_dev.irq) |
507 | misc_deregister(&lis3lv02d_misc_device); | |
dc6ea97b | 508 | input_unregister_polled_device(lis3_dev.idev); |
66c8569b | 509 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 510 | lis3_dev.idev = NULL; |
455fbdd3 | 511 | } |
cfce41a6 | 512 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
455fbdd3 | 513 | |
455fbdd3 | 514 | /* Sysfs stuff */ |
2db4a76d SO |
515 | static ssize_t lis3lv02d_selftest_show(struct device *dev, |
516 | struct device_attribute *attr, char *buf) | |
517 | { | |
518 | int result; | |
519 | s16 values[3]; | |
520 | ||
521 | result = lis3lv02d_selftest(&lis3_dev, values); | |
522 | return sprintf(buf, "%s %d %d %d\n", result == 0 ? "OK" : "FAIL", | |
523 | values[0], values[1], values[2]); | |
524 | } | |
525 | ||
455fbdd3 PM |
526 | static ssize_t lis3lv02d_position_show(struct device *dev, |
527 | struct device_attribute *attr, char *buf) | |
528 | { | |
529 | int x, y, z; | |
530 | ||
6d94d408 | 531 | mutex_lock(&lis3_dev.mutex); |
a38da2ed | 532 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
6d94d408 | 533 | mutex_unlock(&lis3_dev.mutex); |
455fbdd3 PM |
534 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
535 | } | |
536 | ||
455fbdd3 PM |
537 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
538 | struct device_attribute *attr, char *buf) | |
539 | { | |
641615ab | 540 | return sprintf(buf, "%d\n", lis3lv02d_get_odr()); |
455fbdd3 PM |
541 | } |
542 | ||
a253aaef SO |
543 | static ssize_t lis3lv02d_rate_set(struct device *dev, |
544 | struct device_attribute *attr, const char *buf, | |
545 | size_t count) | |
546 | { | |
547 | unsigned long rate; | |
548 | ||
549 | if (strict_strtoul(buf, 0, &rate)) | |
550 | return -EINVAL; | |
551 | ||
552 | if (lis3lv02d_set_odr(rate)) | |
553 | return -EINVAL; | |
554 | ||
555 | return count; | |
556 | } | |
557 | ||
2db4a76d | 558 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
455fbdd3 | 559 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
a253aaef SO |
560 | static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
561 | lis3lv02d_rate_set); | |
455fbdd3 PM |
562 | |
563 | static struct attribute *lis3lv02d_attributes[] = { | |
2db4a76d | 564 | &dev_attr_selftest.attr, |
455fbdd3 | 565 | &dev_attr_position.attr, |
455fbdd3 PM |
566 | &dev_attr_rate.attr, |
567 | NULL | |
568 | }; | |
569 | ||
570 | static struct attribute_group lis3lv02d_attribute_group = { | |
571 | .attrs = lis3lv02d_attributes | |
572 | }; | |
573 | ||
cfce41a6 | 574 | |
a38da2ed | 575 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 576 | { |
a002ee89 EP |
577 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
578 | if (IS_ERR(lis3->pdev)) | |
579 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 580 | |
a002ee89 | 581 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
582 | } |
583 | ||
a002ee89 | 584 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 585 | { |
a002ee89 EP |
586 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
587 | platform_device_unregister(lis3->pdev); | |
455fbdd3 PM |
588 | return 0; |
589 | } | |
cfce41a6 | 590 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 591 | |
ecc437ae SO |
592 | static void lis3lv02d_8b_configure(struct lis3lv02d *dev, |
593 | struct lis3lv02d_platform_data *p) | |
594 | { | |
92ba4fe4 | 595 | int err; |
342c5f12 SO |
596 | int ctrl2 = p->hipass_ctrl; |
597 | ||
ecc437ae SO |
598 | if (p->click_flags) { |
599 | dev->write(dev, CLICK_CFG, p->click_flags); | |
600 | dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit); | |
601 | dev->write(dev, CLICK_LATENCY, p->click_latency); | |
602 | dev->write(dev, CLICK_WINDOW, p->click_window); | |
603 | dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf); | |
604 | dev->write(dev, CLICK_THSY_X, | |
605 | (p->click_thresh_x & 0xf) | | |
606 | (p->click_thresh_y << 4)); | |
6d94d408 SO |
607 | |
608 | if (dev->idev) { | |
609 | struct input_dev *input_dev = lis3_dev.idev->input; | |
610 | input_set_capability(input_dev, EV_KEY, BTN_X); | |
611 | input_set_capability(input_dev, EV_KEY, BTN_Y); | |
612 | input_set_capability(input_dev, EV_KEY, BTN_Z); | |
613 | } | |
ecc437ae SO |
614 | } |
615 | ||
616 | if (p->wakeup_flags) { | |
617 | dev->write(dev, FF_WU_CFG_1, p->wakeup_flags); | |
618 | dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
619 | /* default to 2.5ms for now */ | |
620 | dev->write(dev, FF_WU_DURATION_1, 1); | |
342c5f12 SO |
621 | ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/ |
622 | } | |
623 | ||
624 | if (p->wakeup_flags2) { | |
625 | dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2); | |
626 | dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f); | |
627 | /* default to 2.5ms for now */ | |
628 | dev->write(dev, FF_WU_DURATION_2, 1); | |
629 | ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/ | |
ecc437ae | 630 | } |
342c5f12 SO |
631 | /* Configure hipass filters */ |
632 | dev->write(dev, CTRL_REG2, ctrl2); | |
92ba4fe4 SO |
633 | |
634 | if (p->irq2) { | |
635 | err = request_threaded_irq(p->irq2, | |
636 | NULL, | |
637 | lis302dl_interrupt_thread2_8b, | |
638 | IRQF_TRIGGER_RISING | | |
639 | IRQF_ONESHOT, | |
640 | DRIVER_NAME, &lis3_dev); | |
641 | if (err < 0) | |
642 | printk(KERN_ERR DRIVER_NAME | |
643 | "No second IRQ. Limited functionality\n"); | |
644 | } | |
ecc437ae SO |
645 | } |
646 | ||
ab337a63 DM |
647 | /* |
648 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 649 | * Should be rather independent of the bus system. |
ab337a63 | 650 | */ |
a38da2ed | 651 | int lis3lv02d_init_device(struct lis3lv02d *dev) |
ab337a63 | 652 | { |
92ba4fe4 SO |
653 | int err; |
654 | irq_handler_t thread_fn; | |
655 | ||
a38da2ed DM |
656 | dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I); |
657 | ||
658 | switch (dev->whoami) { | |
bc62c147 ÉP |
659 | case WAI_12B: |
660 | printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n"); | |
661 | dev->read_data = lis3lv02d_read_12; | |
a38da2ed | 662 | dev->mdps_max_val = 2048; |
641615ab | 663 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; |
a253aaef SO |
664 | dev->odrs = lis3_12_rates; |
665 | dev->odr_mask = CTRL1_DF0 | CTRL1_DF1; | |
32496c76 | 666 | dev->scale = LIS3_SENSITIVITY_12B; |
a38da2ed | 667 | break; |
bc62c147 ÉP |
668 | case WAI_8B: |
669 | printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n"); | |
a38da2ed DM |
670 | dev->read_data = lis3lv02d_read_8; |
671 | dev->mdps_max_val = 128; | |
641615ab | 672 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
a253aaef SO |
673 | dev->odrs = lis3_8_rates; |
674 | dev->odr_mask = CTRL1_DR; | |
32496c76 | 675 | dev->scale = LIS3_SENSITIVITY_8B; |
a38da2ed DM |
676 | break; |
677 | default: | |
678 | printk(KERN_ERR DRIVER_NAME | |
a002ee89 | 679 | ": unknown sensor type 0x%X\n", dev->whoami); |
a38da2ed DM |
680 | return -EINVAL; |
681 | } | |
682 | ||
2db4a76d SO |
683 | mutex_init(&dev->mutex); |
684 | ||
a38da2ed | 685 | lis3lv02d_add_fs(dev); |
a002ee89 | 686 | lis3lv02d_poweron(dev); |
ab337a63 DM |
687 | |
688 | if (lis3lv02d_joystick_enable()) | |
689 | printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n"); | |
690 | ||
8f3128e7 DM |
691 | /* passing in platform specific data is purely optional and only |
692 | * used by the SPI transport layer at the moment */ | |
693 | if (dev->pdata) { | |
694 | struct lis3lv02d_platform_data *p = dev->pdata; | |
695 | ||
ecc437ae SO |
696 | if (dev->whoami == WAI_8B) |
697 | lis3lv02d_8b_configure(dev, p); | |
8873c334 | 698 | |
8f3128e7 DM |
699 | if (p->irq_cfg) |
700 | dev->write(dev, CTRL_REG3, p->irq_cfg); | |
701 | } | |
702 | ||
a38da2ed | 703 | /* bail if we did not get an IRQ from the bus layer */ |
ab337a63 DM |
704 | if (!dev->irq) { |
705 | printk(KERN_ERR DRIVER_NAME | |
a38da2ed | 706 | ": No IRQ. Disabling /dev/freefall\n"); |
ab337a63 DM |
707 | goto out; |
708 | } | |
709 | ||
92ba4fe4 SO |
710 | /* |
711 | * The sensor can generate interrupts for free-fall and direction | |
712 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep | |
713 | * the things simple and _fast_ we activate it only for free-fall, so | |
714 | * no need to read register (very slow with ACPI). For the same reason, | |
715 | * we forbid shared interrupts. | |
716 | * | |
717 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the | |
718 | * io-apic is not configurable (and generates a warning) but I keep it | |
719 | * in case of support for other hardware. | |
720 | */ | |
721 | if (dev->whoami == WAI_8B) | |
722 | thread_fn = lis302dl_interrupt_thread1_8b; | |
723 | else | |
724 | thread_fn = NULL; | |
725 | ||
726 | err = request_threaded_irq(dev->irq, lis302dl_interrupt, | |
727 | thread_fn, | |
728 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, | |
729 | DRIVER_NAME, &lis3_dev); | |
730 | ||
731 | if (err < 0) { | |
732 | printk(KERN_ERR DRIVER_NAME "Cannot get IRQ\n"); | |
733 | goto out; | |
734 | } | |
735 | ||
ab337a63 DM |
736 | if (misc_register(&lis3lv02d_misc_device)) |
737 | printk(KERN_ERR DRIVER_NAME ": misc_register failed\n"); | |
738 | out: | |
ab337a63 DM |
739 | return 0; |
740 | } | |
741 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); | |
742 | ||
455fbdd3 | 743 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); |
ef2cfc79 | 744 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
455fbdd3 | 745 | MODULE_LICENSE("GPL"); |