Commit | Line | Data |
---|---|---|
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 | ||
32496c76 SO |
56 | /* |
57 | * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG | |
58 | * LIS302D spec says: 18 mG / digit | |
59 | * LIS3_ACCURACY is used to increase accuracy of the intermediate | |
60 | * calculation results. | |
61 | */ | |
62 | #define LIS3_ACCURACY 1024 | |
63 | /* Sensitivity values for -2G +2G scale */ | |
64 | #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024) | |
65 | #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY) | |
66 | ||
67 | #define LIS3_DEFAULT_FUZZ 3 | |
68 | #define LIS3_DEFAULT_FLAT 3 | |
69 | ||
a38da2ed | 70 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 71 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 PM |
72 | }; |
73 | ||
be84cfc5 | 74 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 75 | |
a38da2ed DM |
76 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
77 | { | |
78 | s8 lo; | |
79 | if (lis3->read(lis3, reg, &lo) < 0) | |
80 | return 0; | |
81 | ||
82 | return lo; | |
83 | } | |
84 | ||
bc62c147 | 85 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
86 | { |
87 | u8 lo, hi; | |
88 | ||
a38da2ed DM |
89 | lis3->read(lis3, reg - 1, &lo); |
90 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
91 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
92 | return (s16)((hi << 8) | lo); | |
93 | } | |
94 | ||
455fbdd3 PM |
95 | /** |
96 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
97 | * @axis: 1,2,3 - can also be negative | |
98 | * @hw_values: raw values returned by the hardware | |
99 | * | |
100 | * Returns the converted value. | |
101 | */ | |
102 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
103 | { | |
104 | if (axis > 0) | |
105 | return hw_values[axis - 1]; | |
106 | else | |
107 | return -hw_values[-axis - 1]; | |
108 | } | |
109 | ||
110 | /** | |
111 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
a38da2ed DM |
112 | * @lis3: pointer to the device struct |
113 | * @x: where to store the X axis value | |
114 | * @y: where to store the Y axis value | |
115 | * @z: where to store the Z axis value | |
455fbdd3 PM |
116 | * |
117 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
118 | */ | |
a38da2ed | 119 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
120 | { |
121 | int position[3]; | |
32496c76 | 122 | int i; |
455fbdd3 | 123 | |
2db4a76d | 124 | mutex_lock(&lis3->mutex); |
a002ee89 EP |
125 | position[0] = lis3->read_data(lis3, OUTX); |
126 | position[1] = lis3->read_data(lis3, OUTY); | |
127 | position[2] = lis3->read_data(lis3, OUTZ); | |
2db4a76d | 128 | mutex_unlock(&lis3->mutex); |
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 | |
ef2cfc79 PM |
252 | static irqreturn_t lis302dl_interrupt(int irq, void *dummy) |
253 | { | |
254 | /* | |
255 | * Be careful: on some HP laptops the bios force DD when on battery and | |
256 | * the lid is closed. This leads to interrupts as soon as a little move | |
257 | * is done. | |
258 | */ | |
be84cfc5 | 259 | atomic_inc(&lis3_dev.count); |
ef2cfc79 | 260 | |
be84cfc5 PM |
261 | wake_up_interruptible(&lis3_dev.misc_wait); |
262 | kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); | |
ef2cfc79 PM |
263 | return IRQ_HANDLED; |
264 | } | |
265 | ||
266 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
267 | { | |
268 | int ret; | |
269 | ||
be84cfc5 | 270 | if (test_and_set_bit(0, &lis3_dev.misc_opened)) |
ef2cfc79 PM |
271 | return -EBUSY; /* already open */ |
272 | ||
be84cfc5 | 273 | atomic_set(&lis3_dev.count, 0); |
ef2cfc79 PM |
274 | |
275 | /* | |
276 | * The sensor can generate interrupts for free-fall and direction | |
277 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep | |
278 | * the things simple and _fast_ we activate it only for free-fall, so | |
279 | * no need to read register (very slow with ACPI). For the same reason, | |
280 | * we forbid shared interrupts. | |
281 | * | |
282 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the | |
283 | * io-apic is not configurable (and generates a warning) but I keep it | |
284 | * in case of support for other hardware. | |
285 | */ | |
be84cfc5 PM |
286 | ret = request_irq(lis3_dev.irq, lis302dl_interrupt, IRQF_TRIGGER_RISING, |
287 | DRIVER_NAME, &lis3_dev); | |
ef2cfc79 PM |
288 | |
289 | if (ret) { | |
be84cfc5 PM |
290 | clear_bit(0, &lis3_dev.misc_opened); |
291 | printk(KERN_ERR DRIVER_NAME ": IRQ%d allocation failed\n", lis3_dev.irq); | |
ef2cfc79 PM |
292 | return -EBUSY; |
293 | } | |
ef2cfc79 PM |
294 | return 0; |
295 | } | |
296 | ||
297 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
298 | { | |
be84cfc5 | 299 | fasync_helper(-1, file, 0, &lis3_dev.async_queue); |
be84cfc5 PM |
300 | free_irq(lis3_dev.irq, &lis3_dev); |
301 | clear_bit(0, &lis3_dev.misc_opened); /* release the device */ | |
ef2cfc79 PM |
302 | return 0; |
303 | } | |
304 | ||
305 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, | |
306 | size_t count, loff_t *pos) | |
307 | { | |
308 | DECLARE_WAITQUEUE(wait, current); | |
309 | u32 data; | |
310 | unsigned char byte_data; | |
311 | ssize_t retval = 1; | |
312 | ||
313 | if (count < 1) | |
314 | return -EINVAL; | |
315 | ||
be84cfc5 | 316 | add_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
317 | while (true) { |
318 | set_current_state(TASK_INTERRUPTIBLE); | |
be84cfc5 | 319 | data = atomic_xchg(&lis3_dev.count, 0); |
ef2cfc79 PM |
320 | if (data) |
321 | break; | |
322 | ||
323 | if (file->f_flags & O_NONBLOCK) { | |
324 | retval = -EAGAIN; | |
325 | goto out; | |
326 | } | |
327 | ||
328 | if (signal_pending(current)) { | |
329 | retval = -ERESTARTSYS; | |
330 | goto out; | |
331 | } | |
332 | ||
333 | schedule(); | |
334 | } | |
335 | ||
336 | if (data < 255) | |
337 | byte_data = data; | |
338 | else | |
339 | byte_data = 255; | |
340 | ||
341 | /* make sure we are not going into copy_to_user() with | |
342 | * TASK_INTERRUPTIBLE state */ | |
343 | set_current_state(TASK_RUNNING); | |
344 | if (copy_to_user(buf, &byte_data, sizeof(byte_data))) | |
345 | retval = -EFAULT; | |
346 | ||
347 | out: | |
348 | __set_current_state(TASK_RUNNING); | |
be84cfc5 | 349 | remove_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
350 | |
351 | return retval; | |
352 | } | |
353 | ||
354 | static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait) | |
355 | { | |
be84cfc5 PM |
356 | poll_wait(file, &lis3_dev.misc_wait, wait); |
357 | if (atomic_read(&lis3_dev.count)) | |
ef2cfc79 PM |
358 | return POLLIN | POLLRDNORM; |
359 | return 0; | |
360 | } | |
361 | ||
362 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) | |
363 | { | |
be84cfc5 | 364 | return fasync_helper(fd, file, on, &lis3_dev.async_queue); |
ef2cfc79 PM |
365 | } |
366 | ||
367 | static const struct file_operations lis3lv02d_misc_fops = { | |
368 | .owner = THIS_MODULE, | |
369 | .llseek = no_llseek, | |
370 | .read = lis3lv02d_misc_read, | |
371 | .open = lis3lv02d_misc_open, | |
372 | .release = lis3lv02d_misc_release, | |
373 | .poll = lis3lv02d_misc_poll, | |
374 | .fasync = lis3lv02d_misc_fasync, | |
375 | }; | |
376 | ||
377 | static struct miscdevice lis3lv02d_misc_device = { | |
378 | .minor = MISC_DYNAMIC_MINOR, | |
379 | .name = "freefall", | |
380 | .fops = &lis3lv02d_misc_fops, | |
381 | }; | |
382 | ||
dc6ea97b | 383 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
455fbdd3 PM |
384 | { |
385 | int x, y, z; | |
386 | ||
dc6ea97b | 387 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
53995412 SO |
388 | input_report_abs(pidev->input, ABS_X, x); |
389 | input_report_abs(pidev->input, ABS_Y, y); | |
390 | input_report_abs(pidev->input, ABS_Z, z); | |
d25a8c81 | 391 | input_sync(pidev->input); |
455fbdd3 PM |
392 | } |
393 | ||
cfce41a6 | 394 | int lis3lv02d_joystick_enable(void) |
455fbdd3 | 395 | { |
dc6ea97b | 396 | struct input_dev *input_dev; |
455fbdd3 | 397 | int err; |
32496c76 | 398 | int max_val, fuzz, flat; |
455fbdd3 | 399 | |
be84cfc5 | 400 | if (lis3_dev.idev) |
455fbdd3 PM |
401 | return -EINVAL; |
402 | ||
dc6ea97b | 403 | lis3_dev.idev = input_allocate_polled_device(); |
be84cfc5 | 404 | if (!lis3_dev.idev) |
455fbdd3 PM |
405 | return -ENOMEM; |
406 | ||
dc6ea97b EP |
407 | lis3_dev.idev->poll = lis3lv02d_joystick_poll; |
408 | lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL; | |
409 | input_dev = lis3_dev.idev->input; | |
410 | ||
dc6ea97b EP |
411 | input_dev->name = "ST LIS3LV02DL Accelerometer"; |
412 | input_dev->phys = DRIVER_NAME "/input0"; | |
413 | input_dev->id.bustype = BUS_HOST; | |
414 | input_dev->id.vendor = 0; | |
415 | input_dev->dev.parent = &lis3_dev.pdev->dev; | |
455fbdd3 | 416 | |
dc6ea97b | 417 | set_bit(EV_ABS, input_dev->evbit); |
32496c76 SO |
418 | max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY; |
419 | fuzz = (LIS3_DEFAULT_FUZZ * lis3_dev.scale) / LIS3_ACCURACY; | |
420 | flat = (LIS3_DEFAULT_FLAT * lis3_dev.scale) / LIS3_ACCURACY; | |
421 | input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat); | |
422 | input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat); | |
423 | input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat); | |
455fbdd3 | 424 | |
dc6ea97b | 425 | err = input_register_polled_device(lis3_dev.idev); |
455fbdd3 | 426 | if (err) { |
dc6ea97b | 427 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 428 | lis3_dev.idev = NULL; |
455fbdd3 PM |
429 | } |
430 | ||
431 | return err; | |
432 | } | |
cfce41a6 | 433 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
455fbdd3 | 434 | |
cfce41a6 | 435 | void lis3lv02d_joystick_disable(void) |
455fbdd3 | 436 | { |
be84cfc5 | 437 | if (!lis3_dev.idev) |
455fbdd3 PM |
438 | return; |
439 | ||
c2884242 EP |
440 | if (lis3_dev.irq) |
441 | misc_deregister(&lis3lv02d_misc_device); | |
dc6ea97b | 442 | input_unregister_polled_device(lis3_dev.idev); |
66c8569b | 443 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 444 | lis3_dev.idev = NULL; |
455fbdd3 | 445 | } |
cfce41a6 | 446 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
455fbdd3 | 447 | |
455fbdd3 | 448 | /* Sysfs stuff */ |
2db4a76d SO |
449 | static ssize_t lis3lv02d_selftest_show(struct device *dev, |
450 | struct device_attribute *attr, char *buf) | |
451 | { | |
452 | int result; | |
453 | s16 values[3]; | |
454 | ||
455 | result = lis3lv02d_selftest(&lis3_dev, values); | |
456 | return sprintf(buf, "%s %d %d %d\n", result == 0 ? "OK" : "FAIL", | |
457 | values[0], values[1], values[2]); | |
458 | } | |
459 | ||
455fbdd3 PM |
460 | static ssize_t lis3lv02d_position_show(struct device *dev, |
461 | struct device_attribute *attr, char *buf) | |
462 | { | |
463 | int x, y, z; | |
464 | ||
a38da2ed | 465 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
455fbdd3 PM |
466 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
467 | } | |
468 | ||
455fbdd3 PM |
469 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
470 | struct device_attribute *attr, char *buf) | |
471 | { | |
641615ab | 472 | return sprintf(buf, "%d\n", lis3lv02d_get_odr()); |
455fbdd3 PM |
473 | } |
474 | ||
a253aaef SO |
475 | static ssize_t lis3lv02d_rate_set(struct device *dev, |
476 | struct device_attribute *attr, const char *buf, | |
477 | size_t count) | |
478 | { | |
479 | unsigned long rate; | |
480 | ||
481 | if (strict_strtoul(buf, 0, &rate)) | |
482 | return -EINVAL; | |
483 | ||
484 | if (lis3lv02d_set_odr(rate)) | |
485 | return -EINVAL; | |
486 | ||
487 | return count; | |
488 | } | |
489 | ||
2db4a76d | 490 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
455fbdd3 | 491 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
a253aaef SO |
492 | static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
493 | lis3lv02d_rate_set); | |
455fbdd3 PM |
494 | |
495 | static struct attribute *lis3lv02d_attributes[] = { | |
2db4a76d | 496 | &dev_attr_selftest.attr, |
455fbdd3 | 497 | &dev_attr_position.attr, |
455fbdd3 PM |
498 | &dev_attr_rate.attr, |
499 | NULL | |
500 | }; | |
501 | ||
502 | static struct attribute_group lis3lv02d_attribute_group = { | |
503 | .attrs = lis3lv02d_attributes | |
504 | }; | |
505 | ||
cfce41a6 | 506 | |
a38da2ed | 507 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 508 | { |
a002ee89 EP |
509 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
510 | if (IS_ERR(lis3->pdev)) | |
511 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 512 | |
a002ee89 | 513 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
514 | } |
515 | ||
a002ee89 | 516 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 517 | { |
a002ee89 EP |
518 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
519 | platform_device_unregister(lis3->pdev); | |
455fbdd3 PM |
520 | return 0; |
521 | } | |
cfce41a6 | 522 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 523 | |
ab337a63 DM |
524 | /* |
525 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 526 | * Should be rather independent of the bus system. |
ab337a63 | 527 | */ |
a38da2ed | 528 | int lis3lv02d_init_device(struct lis3lv02d *dev) |
ab337a63 | 529 | { |
a38da2ed DM |
530 | dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I); |
531 | ||
532 | switch (dev->whoami) { | |
bc62c147 ÉP |
533 | case WAI_12B: |
534 | printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n"); | |
535 | dev->read_data = lis3lv02d_read_12; | |
a38da2ed | 536 | dev->mdps_max_val = 2048; |
641615ab | 537 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; |
a253aaef SO |
538 | dev->odrs = lis3_12_rates; |
539 | dev->odr_mask = CTRL1_DF0 | CTRL1_DF1; | |
32496c76 | 540 | dev->scale = LIS3_SENSITIVITY_12B; |
a38da2ed | 541 | break; |
bc62c147 ÉP |
542 | case WAI_8B: |
543 | printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n"); | |
a38da2ed DM |
544 | dev->read_data = lis3lv02d_read_8; |
545 | dev->mdps_max_val = 128; | |
641615ab | 546 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
a253aaef SO |
547 | dev->odrs = lis3_8_rates; |
548 | dev->odr_mask = CTRL1_DR; | |
32496c76 | 549 | dev->scale = LIS3_SENSITIVITY_8B; |
a38da2ed DM |
550 | break; |
551 | default: | |
552 | printk(KERN_ERR DRIVER_NAME | |
a002ee89 | 553 | ": unknown sensor type 0x%X\n", dev->whoami); |
a38da2ed DM |
554 | return -EINVAL; |
555 | } | |
556 | ||
2db4a76d SO |
557 | mutex_init(&dev->mutex); |
558 | ||
a38da2ed | 559 | lis3lv02d_add_fs(dev); |
a002ee89 | 560 | lis3lv02d_poweron(dev); |
ab337a63 DM |
561 | |
562 | if (lis3lv02d_joystick_enable()) | |
563 | printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n"); | |
564 | ||
8f3128e7 DM |
565 | /* passing in platform specific data is purely optional and only |
566 | * used by the SPI transport layer at the moment */ | |
567 | if (dev->pdata) { | |
568 | struct lis3lv02d_platform_data *p = dev->pdata; | |
569 | ||
bc62c147 | 570 | if (p->click_flags && (dev->whoami == WAI_8B)) { |
8f3128e7 DM |
571 | dev->write(dev, CLICK_CFG, p->click_flags); |
572 | dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit); | |
573 | dev->write(dev, CLICK_LATENCY, p->click_latency); | |
574 | dev->write(dev, CLICK_WINDOW, p->click_window); | |
575 | dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf); | |
576 | dev->write(dev, CLICK_THSY_X, | |
577 | (p->click_thresh_x & 0xf) | | |
578 | (p->click_thresh_y << 4)); | |
579 | } | |
580 | ||
bc62c147 | 581 | if (p->wakeup_flags && (dev->whoami == WAI_8B)) { |
8873c334 DM |
582 | dev->write(dev, FF_WU_CFG_1, p->wakeup_flags); |
583 | dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
584 | /* default to 2.5ms for now */ | |
585 | dev->write(dev, FF_WU_DURATION_1, 1); | |
586 | /* enable high pass filter for both free-fall units */ | |
587 | dev->write(dev, CTRL_REG2, HP_FF_WU1 | HP_FF_WU2); | |
588 | } | |
589 | ||
8f3128e7 DM |
590 | if (p->irq_cfg) |
591 | dev->write(dev, CTRL_REG3, p->irq_cfg); | |
592 | } | |
593 | ||
a38da2ed | 594 | /* bail if we did not get an IRQ from the bus layer */ |
ab337a63 DM |
595 | if (!dev->irq) { |
596 | printk(KERN_ERR DRIVER_NAME | |
a38da2ed | 597 | ": No IRQ. Disabling /dev/freefall\n"); |
ab337a63 DM |
598 | goto out; |
599 | } | |
600 | ||
ab337a63 DM |
601 | if (misc_register(&lis3lv02d_misc_device)) |
602 | printk(KERN_ERR DRIVER_NAME ": misc_register failed\n"); | |
603 | out: | |
ab337a63 DM |
604 | return 0; |
605 | } | |
606 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); | |
607 | ||
455fbdd3 | 608 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); |
ef2cfc79 | 609 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
455fbdd3 | 610 | MODULE_LICENSE("GPL"); |