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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 | |
44 | /* | |
45 | * The sensor can also generate interrupts (DRDY) but it's pretty pointless | |
bc62c147 | 46 | * because they are generated even if the data do not change. So it's better |
455fbdd3 PM |
47 | * to keep the interrupt for the free-fall event. The values are updated at |
48 | * 40Hz (at the lowest frequency), but as it can be pretty time consuming on | |
49 | * some low processor, we poll the sensor only at 20Hz... enough for the | |
50 | * joystick. | |
51 | */ | |
52 | ||
a38da2ed | 53 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 54 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 PM |
55 | }; |
56 | ||
be84cfc5 | 57 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 58 | |
a38da2ed DM |
59 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
60 | { | |
61 | s8 lo; | |
62 | if (lis3->read(lis3, reg, &lo) < 0) | |
63 | return 0; | |
64 | ||
65 | return lo; | |
66 | } | |
67 | ||
bc62c147 | 68 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
69 | { |
70 | u8 lo, hi; | |
71 | ||
a38da2ed DM |
72 | lis3->read(lis3, reg - 1, &lo); |
73 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
74 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
75 | return (s16)((hi << 8) | lo); | |
76 | } | |
77 | ||
455fbdd3 PM |
78 | /** |
79 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
80 | * @axis: 1,2,3 - can also be negative | |
81 | * @hw_values: raw values returned by the hardware | |
82 | * | |
83 | * Returns the converted value. | |
84 | */ | |
85 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
86 | { | |
87 | if (axis > 0) | |
88 | return hw_values[axis - 1]; | |
89 | else | |
90 | return -hw_values[-axis - 1]; | |
91 | } | |
92 | ||
93 | /** | |
94 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
a38da2ed DM |
95 | * @lis3: pointer to the device struct |
96 | * @x: where to store the X axis value | |
97 | * @y: where to store the Y axis value | |
98 | * @z: where to store the Z axis value | |
455fbdd3 PM |
99 | * |
100 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
101 | */ | |
a38da2ed | 102 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
103 | { |
104 | int position[3]; | |
105 | ||
a002ee89 EP |
106 | position[0] = lis3->read_data(lis3, OUTX); |
107 | position[1] = lis3->read_data(lis3, OUTY); | |
108 | position[2] = lis3->read_data(lis3, OUTZ); | |
455fbdd3 | 109 | |
a002ee89 EP |
110 | *x = lis3lv02d_get_axis(lis3->ac.x, position); |
111 | *y = lis3lv02d_get_axis(lis3->ac.y, position); | |
112 | *z = lis3lv02d_get_axis(lis3->ac.z, position); | |
455fbdd3 PM |
113 | } |
114 | ||
a38da2ed | 115 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
455fbdd3 | 116 | { |
a002ee89 EP |
117 | /* disable X,Y,Z axis and power down */ |
118 | lis3->write(lis3, CTRL_REG1, 0x00); | |
455fbdd3 | 119 | } |
cfce41a6 | 120 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
455fbdd3 | 121 | |
a38da2ed | 122 | void lis3lv02d_poweron(struct lis3lv02d *lis3) |
455fbdd3 | 123 | { |
a002ee89 | 124 | u8 reg; |
455fbdd3 | 125 | |
a002ee89 | 126 | lis3->init(lis3); |
455fbdd3 | 127 | |
a002ee89 EP |
128 | /* |
129 | * Common configuration | |
4b5d95b3 ÉP |
130 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
131 | * both have been read. So the value read will always be correct. | |
a002ee89 | 132 | */ |
4b5d95b3 ÉP |
133 | if (lis3->whoami == WAI_12B) { |
134 | lis3->read(lis3, CTRL_REG2, ®); | |
135 | reg |= CTRL2_BDU; | |
136 | lis3->write(lis3, CTRL_REG2, reg); | |
137 | } | |
455fbdd3 | 138 | } |
a002ee89 EP |
139 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
140 | ||
455fbdd3 | 141 | |
ef2cfc79 PM |
142 | static irqreturn_t lis302dl_interrupt(int irq, void *dummy) |
143 | { | |
144 | /* | |
145 | * Be careful: on some HP laptops the bios force DD when on battery and | |
146 | * the lid is closed. This leads to interrupts as soon as a little move | |
147 | * is done. | |
148 | */ | |
be84cfc5 | 149 | atomic_inc(&lis3_dev.count); |
ef2cfc79 | 150 | |
be84cfc5 PM |
151 | wake_up_interruptible(&lis3_dev.misc_wait); |
152 | kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); | |
ef2cfc79 PM |
153 | return IRQ_HANDLED; |
154 | } | |
155 | ||
156 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
157 | { | |
158 | int ret; | |
159 | ||
be84cfc5 | 160 | if (test_and_set_bit(0, &lis3_dev.misc_opened)) |
ef2cfc79 PM |
161 | return -EBUSY; /* already open */ |
162 | ||
be84cfc5 | 163 | atomic_set(&lis3_dev.count, 0); |
ef2cfc79 PM |
164 | |
165 | /* | |
166 | * The sensor can generate interrupts for free-fall and direction | |
167 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep | |
168 | * the things simple and _fast_ we activate it only for free-fall, so | |
169 | * no need to read register (very slow with ACPI). For the same reason, | |
170 | * we forbid shared interrupts. | |
171 | * | |
172 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the | |
173 | * io-apic is not configurable (and generates a warning) but I keep it | |
174 | * in case of support for other hardware. | |
175 | */ | |
be84cfc5 PM |
176 | ret = request_irq(lis3_dev.irq, lis302dl_interrupt, IRQF_TRIGGER_RISING, |
177 | DRIVER_NAME, &lis3_dev); | |
ef2cfc79 PM |
178 | |
179 | if (ret) { | |
be84cfc5 PM |
180 | clear_bit(0, &lis3_dev.misc_opened); |
181 | printk(KERN_ERR DRIVER_NAME ": IRQ%d allocation failed\n", lis3_dev.irq); | |
ef2cfc79 PM |
182 | return -EBUSY; |
183 | } | |
ef2cfc79 PM |
184 | return 0; |
185 | } | |
186 | ||
187 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
188 | { | |
be84cfc5 | 189 | fasync_helper(-1, file, 0, &lis3_dev.async_queue); |
be84cfc5 PM |
190 | free_irq(lis3_dev.irq, &lis3_dev); |
191 | clear_bit(0, &lis3_dev.misc_opened); /* release the device */ | |
ef2cfc79 PM |
192 | return 0; |
193 | } | |
194 | ||
195 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, | |
196 | size_t count, loff_t *pos) | |
197 | { | |
198 | DECLARE_WAITQUEUE(wait, current); | |
199 | u32 data; | |
200 | unsigned char byte_data; | |
201 | ssize_t retval = 1; | |
202 | ||
203 | if (count < 1) | |
204 | return -EINVAL; | |
205 | ||
be84cfc5 | 206 | add_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
207 | while (true) { |
208 | set_current_state(TASK_INTERRUPTIBLE); | |
be84cfc5 | 209 | data = atomic_xchg(&lis3_dev.count, 0); |
ef2cfc79 PM |
210 | if (data) |
211 | break; | |
212 | ||
213 | if (file->f_flags & O_NONBLOCK) { | |
214 | retval = -EAGAIN; | |
215 | goto out; | |
216 | } | |
217 | ||
218 | if (signal_pending(current)) { | |
219 | retval = -ERESTARTSYS; | |
220 | goto out; | |
221 | } | |
222 | ||
223 | schedule(); | |
224 | } | |
225 | ||
226 | if (data < 255) | |
227 | byte_data = data; | |
228 | else | |
229 | byte_data = 255; | |
230 | ||
231 | /* make sure we are not going into copy_to_user() with | |
232 | * TASK_INTERRUPTIBLE state */ | |
233 | set_current_state(TASK_RUNNING); | |
234 | if (copy_to_user(buf, &byte_data, sizeof(byte_data))) | |
235 | retval = -EFAULT; | |
236 | ||
237 | out: | |
238 | __set_current_state(TASK_RUNNING); | |
be84cfc5 | 239 | remove_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
240 | |
241 | return retval; | |
242 | } | |
243 | ||
244 | static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait) | |
245 | { | |
be84cfc5 PM |
246 | poll_wait(file, &lis3_dev.misc_wait, wait); |
247 | if (atomic_read(&lis3_dev.count)) | |
ef2cfc79 PM |
248 | return POLLIN | POLLRDNORM; |
249 | return 0; | |
250 | } | |
251 | ||
252 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) | |
253 | { | |
be84cfc5 | 254 | return fasync_helper(fd, file, on, &lis3_dev.async_queue); |
ef2cfc79 PM |
255 | } |
256 | ||
257 | static const struct file_operations lis3lv02d_misc_fops = { | |
258 | .owner = THIS_MODULE, | |
259 | .llseek = no_llseek, | |
260 | .read = lis3lv02d_misc_read, | |
261 | .open = lis3lv02d_misc_open, | |
262 | .release = lis3lv02d_misc_release, | |
263 | .poll = lis3lv02d_misc_poll, | |
264 | .fasync = lis3lv02d_misc_fasync, | |
265 | }; | |
266 | ||
267 | static struct miscdevice lis3lv02d_misc_device = { | |
268 | .minor = MISC_DYNAMIC_MINOR, | |
269 | .name = "freefall", | |
270 | .fops = &lis3lv02d_misc_fops, | |
271 | }; | |
272 | ||
dc6ea97b | 273 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
455fbdd3 PM |
274 | { |
275 | int x, y, z; | |
276 | ||
dc6ea97b EP |
277 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
278 | input_report_abs(pidev->input, ABS_X, x - lis3_dev.xcalib); | |
279 | input_report_abs(pidev->input, ABS_Y, y - lis3_dev.ycalib); | |
280 | input_report_abs(pidev->input, ABS_Z, z - lis3_dev.zcalib); | |
d25a8c81 | 281 | input_sync(pidev->input); |
455fbdd3 PM |
282 | } |
283 | ||
455fbdd3 | 284 | |
455fbdd3 PM |
285 | static inline void lis3lv02d_calibrate_joystick(void) |
286 | { | |
a38da2ed DM |
287 | lis3lv02d_get_xyz(&lis3_dev, |
288 | &lis3_dev.xcalib, &lis3_dev.ycalib, &lis3_dev.zcalib); | |
455fbdd3 PM |
289 | } |
290 | ||
cfce41a6 | 291 | int lis3lv02d_joystick_enable(void) |
455fbdd3 | 292 | { |
dc6ea97b | 293 | struct input_dev *input_dev; |
455fbdd3 PM |
294 | int err; |
295 | ||
be84cfc5 | 296 | if (lis3_dev.idev) |
455fbdd3 PM |
297 | return -EINVAL; |
298 | ||
dc6ea97b | 299 | lis3_dev.idev = input_allocate_polled_device(); |
be84cfc5 | 300 | if (!lis3_dev.idev) |
455fbdd3 PM |
301 | return -ENOMEM; |
302 | ||
dc6ea97b EP |
303 | lis3_dev.idev->poll = lis3lv02d_joystick_poll; |
304 | lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL; | |
305 | input_dev = lis3_dev.idev->input; | |
306 | ||
455fbdd3 PM |
307 | lis3lv02d_calibrate_joystick(); |
308 | ||
dc6ea97b EP |
309 | input_dev->name = "ST LIS3LV02DL Accelerometer"; |
310 | input_dev->phys = DRIVER_NAME "/input0"; | |
311 | input_dev->id.bustype = BUS_HOST; | |
312 | input_dev->id.vendor = 0; | |
313 | input_dev->dev.parent = &lis3_dev.pdev->dev; | |
455fbdd3 | 314 | |
dc6ea97b EP |
315 | set_bit(EV_ABS, input_dev->evbit); |
316 | input_set_abs_params(input_dev, ABS_X, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3); | |
317 | input_set_abs_params(input_dev, ABS_Y, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3); | |
318 | input_set_abs_params(input_dev, ABS_Z, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3); | |
455fbdd3 | 319 | |
dc6ea97b | 320 | err = input_register_polled_device(lis3_dev.idev); |
455fbdd3 | 321 | if (err) { |
dc6ea97b | 322 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 323 | lis3_dev.idev = NULL; |
455fbdd3 PM |
324 | } |
325 | ||
326 | return err; | |
327 | } | |
cfce41a6 | 328 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
455fbdd3 | 329 | |
cfce41a6 | 330 | void lis3lv02d_joystick_disable(void) |
455fbdd3 | 331 | { |
be84cfc5 | 332 | if (!lis3_dev.idev) |
455fbdd3 PM |
333 | return; |
334 | ||
c2884242 EP |
335 | if (lis3_dev.irq) |
336 | misc_deregister(&lis3lv02d_misc_device); | |
dc6ea97b | 337 | input_unregister_polled_device(lis3_dev.idev); |
66c8569b | 338 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 339 | lis3_dev.idev = NULL; |
455fbdd3 | 340 | } |
cfce41a6 | 341 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
455fbdd3 | 342 | |
455fbdd3 PM |
343 | /* Sysfs stuff */ |
344 | static ssize_t lis3lv02d_position_show(struct device *dev, | |
345 | struct device_attribute *attr, char *buf) | |
346 | { | |
347 | int x, y, z; | |
348 | ||
a38da2ed | 349 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
455fbdd3 PM |
350 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
351 | } | |
352 | ||
353 | static ssize_t lis3lv02d_calibrate_show(struct device *dev, | |
354 | struct device_attribute *attr, char *buf) | |
355 | { | |
be84cfc5 | 356 | return sprintf(buf, "(%d,%d,%d)\n", lis3_dev.xcalib, lis3_dev.ycalib, lis3_dev.zcalib); |
455fbdd3 PM |
357 | } |
358 | ||
359 | static ssize_t lis3lv02d_calibrate_store(struct device *dev, | |
360 | struct device_attribute *attr, | |
361 | const char *buf, size_t count) | |
362 | { | |
455fbdd3 | 363 | lis3lv02d_calibrate_joystick(); |
455fbdd3 PM |
364 | return count; |
365 | } | |
366 | ||
367 | /* conversion btw sampling rate and the register values */ | |
4b5d95b3 ÉP |
368 | static int lis3_12_rates[4] = {40, 160, 640, 2560}; |
369 | static int lis3_8_rates[2] = {100, 400}; | |
455fbdd3 PM |
370 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
371 | struct device_attribute *attr, char *buf) | |
372 | { | |
373 | u8 ctrl; | |
374 | int val; | |
375 | ||
a38da2ed | 376 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); |
4b5d95b3 ÉP |
377 | |
378 | if (lis3_dev.whoami == WAI_12B) | |
379 | val = lis3_12_rates[(ctrl & (CTRL1_DF0 | CTRL1_DF1)) >> 4]; | |
380 | else | |
381 | val = lis3_8_rates[(ctrl & CTRL1_DR) >> 7]; | |
382 | ||
383 | return sprintf(buf, "%d\n", val); | |
455fbdd3 PM |
384 | } |
385 | ||
386 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); | |
387 | static DEVICE_ATTR(calibrate, S_IRUGO|S_IWUSR, lis3lv02d_calibrate_show, | |
388 | lis3lv02d_calibrate_store); | |
389 | static DEVICE_ATTR(rate, S_IRUGO, lis3lv02d_rate_show, NULL); | |
390 | ||
391 | static struct attribute *lis3lv02d_attributes[] = { | |
392 | &dev_attr_position.attr, | |
393 | &dev_attr_calibrate.attr, | |
394 | &dev_attr_rate.attr, | |
395 | NULL | |
396 | }; | |
397 | ||
398 | static struct attribute_group lis3lv02d_attribute_group = { | |
399 | .attrs = lis3lv02d_attributes | |
400 | }; | |
401 | ||
cfce41a6 | 402 | |
a38da2ed | 403 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 404 | { |
a002ee89 EP |
405 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
406 | if (IS_ERR(lis3->pdev)) | |
407 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 408 | |
a002ee89 | 409 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
410 | } |
411 | ||
a002ee89 | 412 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 413 | { |
a002ee89 EP |
414 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
415 | platform_device_unregister(lis3->pdev); | |
455fbdd3 PM |
416 | return 0; |
417 | } | |
cfce41a6 | 418 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 419 | |
ab337a63 DM |
420 | /* |
421 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 422 | * Should be rather independent of the bus system. |
ab337a63 | 423 | */ |
a38da2ed | 424 | int lis3lv02d_init_device(struct lis3lv02d *dev) |
ab337a63 | 425 | { |
a38da2ed DM |
426 | dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I); |
427 | ||
428 | switch (dev->whoami) { | |
bc62c147 ÉP |
429 | case WAI_12B: |
430 | printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n"); | |
431 | dev->read_data = lis3lv02d_read_12; | |
a38da2ed DM |
432 | dev->mdps_max_val = 2048; |
433 | break; | |
bc62c147 ÉP |
434 | case WAI_8B: |
435 | printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n"); | |
a38da2ed DM |
436 | dev->read_data = lis3lv02d_read_8; |
437 | dev->mdps_max_val = 128; | |
438 | break; | |
439 | default: | |
440 | printk(KERN_ERR DRIVER_NAME | |
a002ee89 | 441 | ": unknown sensor type 0x%X\n", dev->whoami); |
a38da2ed DM |
442 | return -EINVAL; |
443 | } | |
444 | ||
a38da2ed | 445 | lis3lv02d_add_fs(dev); |
a002ee89 | 446 | lis3lv02d_poweron(dev); |
ab337a63 DM |
447 | |
448 | if (lis3lv02d_joystick_enable()) | |
449 | printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n"); | |
450 | ||
8f3128e7 DM |
451 | /* passing in platform specific data is purely optional and only |
452 | * used by the SPI transport layer at the moment */ | |
453 | if (dev->pdata) { | |
454 | struct lis3lv02d_platform_data *p = dev->pdata; | |
455 | ||
bc62c147 | 456 | if (p->click_flags && (dev->whoami == WAI_8B)) { |
8f3128e7 DM |
457 | dev->write(dev, CLICK_CFG, p->click_flags); |
458 | dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit); | |
459 | dev->write(dev, CLICK_LATENCY, p->click_latency); | |
460 | dev->write(dev, CLICK_WINDOW, p->click_window); | |
461 | dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf); | |
462 | dev->write(dev, CLICK_THSY_X, | |
463 | (p->click_thresh_x & 0xf) | | |
464 | (p->click_thresh_y << 4)); | |
465 | } | |
466 | ||
bc62c147 | 467 | if (p->wakeup_flags && (dev->whoami == WAI_8B)) { |
8873c334 DM |
468 | dev->write(dev, FF_WU_CFG_1, p->wakeup_flags); |
469 | dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
470 | /* default to 2.5ms for now */ | |
471 | dev->write(dev, FF_WU_DURATION_1, 1); | |
472 | /* enable high pass filter for both free-fall units */ | |
473 | dev->write(dev, CTRL_REG2, HP_FF_WU1 | HP_FF_WU2); | |
474 | } | |
475 | ||
8f3128e7 DM |
476 | if (p->irq_cfg) |
477 | dev->write(dev, CTRL_REG3, p->irq_cfg); | |
478 | } | |
479 | ||
a38da2ed | 480 | /* bail if we did not get an IRQ from the bus layer */ |
ab337a63 DM |
481 | if (!dev->irq) { |
482 | printk(KERN_ERR DRIVER_NAME | |
a38da2ed | 483 | ": No IRQ. Disabling /dev/freefall\n"); |
ab337a63 DM |
484 | goto out; |
485 | } | |
486 | ||
ab337a63 DM |
487 | if (misc_register(&lis3lv02d_misc_device)) |
488 | printk(KERN_ERR DRIVER_NAME ": misc_register failed\n"); | |
489 | out: | |
ab337a63 DM |
490 | return 0; |
491 | } | |
492 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); | |
493 | ||
455fbdd3 | 494 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); |
ef2cfc79 | 495 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
455fbdd3 PM |
496 | MODULE_LICENSE("GPL"); |
497 |