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 | |
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 | ||
641615ab SO |
53 | #define LIS3_PWRON_DELAY_WAI_12B (5000) |
54 | #define LIS3_PWRON_DELAY_WAI_8B (3000) | |
55 | ||
a38da2ed | 56 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 57 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 PM |
58 | }; |
59 | ||
be84cfc5 | 60 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 61 | |
a38da2ed DM |
62 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
63 | { | |
64 | s8 lo; | |
65 | if (lis3->read(lis3, reg, &lo) < 0) | |
66 | return 0; | |
67 | ||
68 | return lo; | |
69 | } | |
70 | ||
bc62c147 | 71 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
72 | { |
73 | u8 lo, hi; | |
74 | ||
a38da2ed DM |
75 | lis3->read(lis3, reg - 1, &lo); |
76 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
77 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
78 | return (s16)((hi << 8) | lo); | |
79 | } | |
80 | ||
455fbdd3 PM |
81 | /** |
82 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
83 | * @axis: 1,2,3 - can also be negative | |
84 | * @hw_values: raw values returned by the hardware | |
85 | * | |
86 | * Returns the converted value. | |
87 | */ | |
88 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
89 | { | |
90 | if (axis > 0) | |
91 | return hw_values[axis - 1]; | |
92 | else | |
93 | return -hw_values[-axis - 1]; | |
94 | } | |
95 | ||
96 | /** | |
97 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
a38da2ed DM |
98 | * @lis3: pointer to the device struct |
99 | * @x: where to store the X axis value | |
100 | * @y: where to store the Y axis value | |
101 | * @z: where to store the Z axis value | |
455fbdd3 PM |
102 | * |
103 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
104 | */ | |
a38da2ed | 105 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
106 | { |
107 | int position[3]; | |
108 | ||
2db4a76d | 109 | mutex_lock(&lis3->mutex); |
a002ee89 EP |
110 | position[0] = lis3->read_data(lis3, OUTX); |
111 | position[1] = lis3->read_data(lis3, OUTY); | |
112 | position[2] = lis3->read_data(lis3, OUTZ); | |
2db4a76d | 113 | mutex_unlock(&lis3->mutex); |
455fbdd3 | 114 | |
a002ee89 EP |
115 | *x = lis3lv02d_get_axis(lis3->ac.x, position); |
116 | *y = lis3lv02d_get_axis(lis3->ac.y, position); | |
117 | *z = lis3lv02d_get_axis(lis3->ac.z, position); | |
455fbdd3 PM |
118 | } |
119 | ||
641615ab SO |
120 | /* conversion btw sampling rate and the register values */ |
121 | static int lis3_12_rates[4] = {40, 160, 640, 2560}; | |
122 | static int lis3_8_rates[2] = {100, 400}; | |
123 | ||
124 | static int lis3lv02d_get_odr(void) | |
125 | { | |
126 | u8 ctrl; | |
127 | int val; | |
128 | ||
129 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); | |
130 | ||
131 | if (lis3_dev.whoami == WAI_12B) | |
132 | val = lis3_12_rates[(ctrl & (CTRL1_DF0 | CTRL1_DF1)) >> 4]; | |
133 | else | |
134 | val = lis3_8_rates[(ctrl & CTRL1_DR) >> 7]; | |
135 | return val; | |
136 | } | |
137 | ||
2db4a76d SO |
138 | static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
139 | { | |
140 | u8 reg; | |
141 | s16 x, y, z; | |
142 | u8 selftest; | |
143 | int ret; | |
144 | ||
145 | mutex_lock(&lis3->mutex); | |
146 | if (lis3_dev.whoami == WAI_12B) | |
147 | selftest = CTRL1_ST; | |
148 | else | |
149 | selftest = CTRL1_STP; | |
150 | ||
151 | lis3->read(lis3, CTRL_REG1, ®); | |
152 | lis3->write(lis3, CTRL_REG1, (reg | selftest)); | |
153 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
154 | ||
155 | /* Read directly to avoid axis remap */ | |
156 | x = lis3->read_data(lis3, OUTX); | |
157 | y = lis3->read_data(lis3, OUTY); | |
158 | z = lis3->read_data(lis3, OUTZ); | |
159 | ||
160 | /* back to normal settings */ | |
161 | lis3->write(lis3, CTRL_REG1, reg); | |
162 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
163 | ||
164 | results[0] = x - lis3->read_data(lis3, OUTX); | |
165 | results[1] = y - lis3->read_data(lis3, OUTY); | |
166 | results[2] = z - lis3->read_data(lis3, OUTZ); | |
167 | ||
168 | ret = 0; | |
169 | if (lis3->pdata) { | |
170 | int i; | |
171 | for (i = 0; i < 3; i++) { | |
172 | /* Check against selftest acceptance limits */ | |
173 | if ((results[i] < lis3->pdata->st_min_limits[i]) || | |
174 | (results[i] > lis3->pdata->st_max_limits[i])) { | |
175 | ret = -EIO; | |
176 | goto fail; | |
177 | } | |
178 | } | |
179 | } | |
180 | ||
181 | /* test passed */ | |
182 | fail: | |
183 | mutex_unlock(&lis3->mutex); | |
184 | return ret; | |
185 | } | |
186 | ||
a38da2ed | 187 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
455fbdd3 | 188 | { |
a002ee89 EP |
189 | /* disable X,Y,Z axis and power down */ |
190 | lis3->write(lis3, CTRL_REG1, 0x00); | |
455fbdd3 | 191 | } |
cfce41a6 | 192 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
455fbdd3 | 193 | |
a38da2ed | 194 | void lis3lv02d_poweron(struct lis3lv02d *lis3) |
455fbdd3 | 195 | { |
a002ee89 | 196 | u8 reg; |
455fbdd3 | 197 | |
a002ee89 | 198 | lis3->init(lis3); |
455fbdd3 | 199 | |
641615ab SO |
200 | /* LIS3 power on delay is quite long */ |
201 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
202 | ||
a002ee89 EP |
203 | /* |
204 | * Common configuration | |
4b5d95b3 ÉP |
205 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
206 | * both have been read. So the value read will always be correct. | |
a002ee89 | 207 | */ |
4b5d95b3 ÉP |
208 | if (lis3->whoami == WAI_12B) { |
209 | lis3->read(lis3, CTRL_REG2, ®); | |
210 | reg |= CTRL2_BDU; | |
211 | lis3->write(lis3, CTRL_REG2, reg); | |
212 | } | |
455fbdd3 | 213 | } |
a002ee89 EP |
214 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
215 | ||
455fbdd3 | 216 | |
ef2cfc79 PM |
217 | static irqreturn_t lis302dl_interrupt(int irq, void *dummy) |
218 | { | |
219 | /* | |
220 | * Be careful: on some HP laptops the bios force DD when on battery and | |
221 | * the lid is closed. This leads to interrupts as soon as a little move | |
222 | * is done. | |
223 | */ | |
be84cfc5 | 224 | atomic_inc(&lis3_dev.count); |
ef2cfc79 | 225 | |
be84cfc5 PM |
226 | wake_up_interruptible(&lis3_dev.misc_wait); |
227 | kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); | |
ef2cfc79 PM |
228 | return IRQ_HANDLED; |
229 | } | |
230 | ||
231 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
232 | { | |
233 | int ret; | |
234 | ||
be84cfc5 | 235 | if (test_and_set_bit(0, &lis3_dev.misc_opened)) |
ef2cfc79 PM |
236 | return -EBUSY; /* already open */ |
237 | ||
be84cfc5 | 238 | atomic_set(&lis3_dev.count, 0); |
ef2cfc79 PM |
239 | |
240 | /* | |
241 | * The sensor can generate interrupts for free-fall and direction | |
242 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep | |
243 | * the things simple and _fast_ we activate it only for free-fall, so | |
244 | * no need to read register (very slow with ACPI). For the same reason, | |
245 | * we forbid shared interrupts. | |
246 | * | |
247 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the | |
248 | * io-apic is not configurable (and generates a warning) but I keep it | |
249 | * in case of support for other hardware. | |
250 | */ | |
be84cfc5 PM |
251 | ret = request_irq(lis3_dev.irq, lis302dl_interrupt, IRQF_TRIGGER_RISING, |
252 | DRIVER_NAME, &lis3_dev); | |
ef2cfc79 PM |
253 | |
254 | if (ret) { | |
be84cfc5 PM |
255 | clear_bit(0, &lis3_dev.misc_opened); |
256 | printk(KERN_ERR DRIVER_NAME ": IRQ%d allocation failed\n", lis3_dev.irq); | |
ef2cfc79 PM |
257 | return -EBUSY; |
258 | } | |
ef2cfc79 PM |
259 | return 0; |
260 | } | |
261 | ||
262 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
263 | { | |
be84cfc5 | 264 | fasync_helper(-1, file, 0, &lis3_dev.async_queue); |
be84cfc5 PM |
265 | free_irq(lis3_dev.irq, &lis3_dev); |
266 | clear_bit(0, &lis3_dev.misc_opened); /* release the device */ | |
ef2cfc79 PM |
267 | return 0; |
268 | } | |
269 | ||
270 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, | |
271 | size_t count, loff_t *pos) | |
272 | { | |
273 | DECLARE_WAITQUEUE(wait, current); | |
274 | u32 data; | |
275 | unsigned char byte_data; | |
276 | ssize_t retval = 1; | |
277 | ||
278 | if (count < 1) | |
279 | return -EINVAL; | |
280 | ||
be84cfc5 | 281 | add_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
282 | while (true) { |
283 | set_current_state(TASK_INTERRUPTIBLE); | |
be84cfc5 | 284 | data = atomic_xchg(&lis3_dev.count, 0); |
ef2cfc79 PM |
285 | if (data) |
286 | break; | |
287 | ||
288 | if (file->f_flags & O_NONBLOCK) { | |
289 | retval = -EAGAIN; | |
290 | goto out; | |
291 | } | |
292 | ||
293 | if (signal_pending(current)) { | |
294 | retval = -ERESTARTSYS; | |
295 | goto out; | |
296 | } | |
297 | ||
298 | schedule(); | |
299 | } | |
300 | ||
301 | if (data < 255) | |
302 | byte_data = data; | |
303 | else | |
304 | byte_data = 255; | |
305 | ||
306 | /* make sure we are not going into copy_to_user() with | |
307 | * TASK_INTERRUPTIBLE state */ | |
308 | set_current_state(TASK_RUNNING); | |
309 | if (copy_to_user(buf, &byte_data, sizeof(byte_data))) | |
310 | retval = -EFAULT; | |
311 | ||
312 | out: | |
313 | __set_current_state(TASK_RUNNING); | |
be84cfc5 | 314 | remove_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
315 | |
316 | return retval; | |
317 | } | |
318 | ||
319 | static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait) | |
320 | { | |
be84cfc5 PM |
321 | poll_wait(file, &lis3_dev.misc_wait, wait); |
322 | if (atomic_read(&lis3_dev.count)) | |
ef2cfc79 PM |
323 | return POLLIN | POLLRDNORM; |
324 | return 0; | |
325 | } | |
326 | ||
327 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) | |
328 | { | |
be84cfc5 | 329 | return fasync_helper(fd, file, on, &lis3_dev.async_queue); |
ef2cfc79 PM |
330 | } |
331 | ||
332 | static const struct file_operations lis3lv02d_misc_fops = { | |
333 | .owner = THIS_MODULE, | |
334 | .llseek = no_llseek, | |
335 | .read = lis3lv02d_misc_read, | |
336 | .open = lis3lv02d_misc_open, | |
337 | .release = lis3lv02d_misc_release, | |
338 | .poll = lis3lv02d_misc_poll, | |
339 | .fasync = lis3lv02d_misc_fasync, | |
340 | }; | |
341 | ||
342 | static struct miscdevice lis3lv02d_misc_device = { | |
343 | .minor = MISC_DYNAMIC_MINOR, | |
344 | .name = "freefall", | |
345 | .fops = &lis3lv02d_misc_fops, | |
346 | }; | |
347 | ||
dc6ea97b | 348 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
455fbdd3 PM |
349 | { |
350 | int x, y, z; | |
351 | ||
dc6ea97b | 352 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
53995412 SO |
353 | input_report_abs(pidev->input, ABS_X, x); |
354 | input_report_abs(pidev->input, ABS_Y, y); | |
355 | input_report_abs(pidev->input, ABS_Z, z); | |
d25a8c81 | 356 | input_sync(pidev->input); |
455fbdd3 PM |
357 | } |
358 | ||
cfce41a6 | 359 | int lis3lv02d_joystick_enable(void) |
455fbdd3 | 360 | { |
dc6ea97b | 361 | struct input_dev *input_dev; |
455fbdd3 PM |
362 | int err; |
363 | ||
be84cfc5 | 364 | if (lis3_dev.idev) |
455fbdd3 PM |
365 | return -EINVAL; |
366 | ||
dc6ea97b | 367 | lis3_dev.idev = input_allocate_polled_device(); |
be84cfc5 | 368 | if (!lis3_dev.idev) |
455fbdd3 PM |
369 | return -ENOMEM; |
370 | ||
dc6ea97b EP |
371 | lis3_dev.idev->poll = lis3lv02d_joystick_poll; |
372 | lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL; | |
373 | input_dev = lis3_dev.idev->input; | |
374 | ||
dc6ea97b EP |
375 | input_dev->name = "ST LIS3LV02DL Accelerometer"; |
376 | input_dev->phys = DRIVER_NAME "/input0"; | |
377 | input_dev->id.bustype = BUS_HOST; | |
378 | input_dev->id.vendor = 0; | |
379 | input_dev->dev.parent = &lis3_dev.pdev->dev; | |
455fbdd3 | 380 | |
dc6ea97b EP |
381 | set_bit(EV_ABS, input_dev->evbit); |
382 | input_set_abs_params(input_dev, ABS_X, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3); | |
383 | input_set_abs_params(input_dev, ABS_Y, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3); | |
384 | input_set_abs_params(input_dev, ABS_Z, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3); | |
455fbdd3 | 385 | |
dc6ea97b | 386 | err = input_register_polled_device(lis3_dev.idev); |
455fbdd3 | 387 | if (err) { |
dc6ea97b | 388 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 389 | lis3_dev.idev = NULL; |
455fbdd3 PM |
390 | } |
391 | ||
392 | return err; | |
393 | } | |
cfce41a6 | 394 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
455fbdd3 | 395 | |
cfce41a6 | 396 | void lis3lv02d_joystick_disable(void) |
455fbdd3 | 397 | { |
be84cfc5 | 398 | if (!lis3_dev.idev) |
455fbdd3 PM |
399 | return; |
400 | ||
c2884242 EP |
401 | if (lis3_dev.irq) |
402 | misc_deregister(&lis3lv02d_misc_device); | |
dc6ea97b | 403 | input_unregister_polled_device(lis3_dev.idev); |
66c8569b | 404 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 405 | lis3_dev.idev = NULL; |
455fbdd3 | 406 | } |
cfce41a6 | 407 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
455fbdd3 | 408 | |
455fbdd3 | 409 | /* Sysfs stuff */ |
2db4a76d SO |
410 | static ssize_t lis3lv02d_selftest_show(struct device *dev, |
411 | struct device_attribute *attr, char *buf) | |
412 | { | |
413 | int result; | |
414 | s16 values[3]; | |
415 | ||
416 | result = lis3lv02d_selftest(&lis3_dev, values); | |
417 | return sprintf(buf, "%s %d %d %d\n", result == 0 ? "OK" : "FAIL", | |
418 | values[0], values[1], values[2]); | |
419 | } | |
420 | ||
455fbdd3 PM |
421 | static ssize_t lis3lv02d_position_show(struct device *dev, |
422 | struct device_attribute *attr, char *buf) | |
423 | { | |
424 | int x, y, z; | |
425 | ||
a38da2ed | 426 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
455fbdd3 PM |
427 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
428 | } | |
429 | ||
455fbdd3 PM |
430 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
431 | struct device_attribute *attr, char *buf) | |
432 | { | |
641615ab | 433 | return sprintf(buf, "%d\n", lis3lv02d_get_odr()); |
455fbdd3 PM |
434 | } |
435 | ||
2db4a76d | 436 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
455fbdd3 | 437 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
455fbdd3 PM |
438 | static DEVICE_ATTR(rate, S_IRUGO, lis3lv02d_rate_show, NULL); |
439 | ||
440 | static struct attribute *lis3lv02d_attributes[] = { | |
2db4a76d | 441 | &dev_attr_selftest.attr, |
455fbdd3 | 442 | &dev_attr_position.attr, |
455fbdd3 PM |
443 | &dev_attr_rate.attr, |
444 | NULL | |
445 | }; | |
446 | ||
447 | static struct attribute_group lis3lv02d_attribute_group = { | |
448 | .attrs = lis3lv02d_attributes | |
449 | }; | |
450 | ||
cfce41a6 | 451 | |
a38da2ed | 452 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 453 | { |
a002ee89 EP |
454 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
455 | if (IS_ERR(lis3->pdev)) | |
456 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 457 | |
a002ee89 | 458 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
459 | } |
460 | ||
a002ee89 | 461 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 462 | { |
a002ee89 EP |
463 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
464 | platform_device_unregister(lis3->pdev); | |
455fbdd3 PM |
465 | return 0; |
466 | } | |
cfce41a6 | 467 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 468 | |
ab337a63 DM |
469 | /* |
470 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 471 | * Should be rather independent of the bus system. |
ab337a63 | 472 | */ |
a38da2ed | 473 | int lis3lv02d_init_device(struct lis3lv02d *dev) |
ab337a63 | 474 | { |
a38da2ed DM |
475 | dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I); |
476 | ||
477 | switch (dev->whoami) { | |
bc62c147 ÉP |
478 | case WAI_12B: |
479 | printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n"); | |
480 | dev->read_data = lis3lv02d_read_12; | |
a38da2ed | 481 | dev->mdps_max_val = 2048; |
641615ab | 482 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; |
a38da2ed | 483 | break; |
bc62c147 ÉP |
484 | case WAI_8B: |
485 | printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n"); | |
a38da2ed DM |
486 | dev->read_data = lis3lv02d_read_8; |
487 | dev->mdps_max_val = 128; | |
641615ab | 488 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
a38da2ed DM |
489 | break; |
490 | default: | |
491 | printk(KERN_ERR DRIVER_NAME | |
a002ee89 | 492 | ": unknown sensor type 0x%X\n", dev->whoami); |
a38da2ed DM |
493 | return -EINVAL; |
494 | } | |
495 | ||
2db4a76d SO |
496 | mutex_init(&dev->mutex); |
497 | ||
a38da2ed | 498 | lis3lv02d_add_fs(dev); |
a002ee89 | 499 | lis3lv02d_poweron(dev); |
ab337a63 DM |
500 | |
501 | if (lis3lv02d_joystick_enable()) | |
502 | printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n"); | |
503 | ||
8f3128e7 DM |
504 | /* passing in platform specific data is purely optional and only |
505 | * used by the SPI transport layer at the moment */ | |
506 | if (dev->pdata) { | |
507 | struct lis3lv02d_platform_data *p = dev->pdata; | |
508 | ||
bc62c147 | 509 | if (p->click_flags && (dev->whoami == WAI_8B)) { |
8f3128e7 DM |
510 | dev->write(dev, CLICK_CFG, p->click_flags); |
511 | dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit); | |
512 | dev->write(dev, CLICK_LATENCY, p->click_latency); | |
513 | dev->write(dev, CLICK_WINDOW, p->click_window); | |
514 | dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf); | |
515 | dev->write(dev, CLICK_THSY_X, | |
516 | (p->click_thresh_x & 0xf) | | |
517 | (p->click_thresh_y << 4)); | |
518 | } | |
519 | ||
bc62c147 | 520 | if (p->wakeup_flags && (dev->whoami == WAI_8B)) { |
8873c334 DM |
521 | dev->write(dev, FF_WU_CFG_1, p->wakeup_flags); |
522 | dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
523 | /* default to 2.5ms for now */ | |
524 | dev->write(dev, FF_WU_DURATION_1, 1); | |
525 | /* enable high pass filter for both free-fall units */ | |
526 | dev->write(dev, CTRL_REG2, HP_FF_WU1 | HP_FF_WU2); | |
527 | } | |
528 | ||
8f3128e7 DM |
529 | if (p->irq_cfg) |
530 | dev->write(dev, CTRL_REG3, p->irq_cfg); | |
531 | } | |
532 | ||
a38da2ed | 533 | /* bail if we did not get an IRQ from the bus layer */ |
ab337a63 DM |
534 | if (!dev->irq) { |
535 | printk(KERN_ERR DRIVER_NAME | |
a38da2ed | 536 | ": No IRQ. Disabling /dev/freefall\n"); |
ab337a63 DM |
537 | goto out; |
538 | } | |
539 | ||
ab337a63 DM |
540 | if (misc_register(&lis3lv02d_misc_device)) |
541 | printk(KERN_ERR DRIVER_NAME ": misc_register failed\n"); | |
542 | out: | |
ab337a63 DM |
543 | return 0; |
544 | } | |
545 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); | |
546 | ||
455fbdd3 | 547 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); |
ef2cfc79 | 548 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
455fbdd3 | 549 | MODULE_LICENSE("GPL"); |