1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
4 *
5 * Copyright (C) 2007-2008 Yan Burman
6 * Copyright (C) 2008 Eric Piel
7 * Copyright (C) 2008-2009 Pavel Machek
8 */
9
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12 #include <linux/kernel.h>
13 #include <linux/sched/signal.h>
14 #include <linux/dmi.h>
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/interrupt.h>
18 #include <linux/input.h>
19 #include <linux/delay.h>
20 #include <linux/wait.h>
21 #include <linux/poll.h>
22 #include <linux/slab.h>
23 #include <linux/freezer.h>
24 #include <linux/uaccess.h>
25 #include <linux/miscdevice.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/atomic.h>
28 #include <linux/of.h>
29 #include "lis3lv02d.h"
30
31 #define DRIVER_NAME "lis3lv02d"
32
33 /* joystick device poll interval in milliseconds */
34 #define MDPS_POLL_INTERVAL 50
35 #define MDPS_POLL_MIN 0
36 #define MDPS_POLL_MAX 2000
37
38 #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
39
40 #define SELFTEST_OK 0
41 #define SELFTEST_FAIL -1
42 #define SELFTEST_IRQ -2
43
44 #define IRQ_LINE0 0
45 #define IRQ_LINE1 1
46
47 /*
48 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
49 * because they are generated even if the data do not change. So it's better
50 * to keep the interrupt for the free-fall event. The values are updated at
51 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
52 * some low processor, we poll the sensor only at 20Hz... enough for the
53 * joystick.
54 */
55
56 #define LIS3_PWRON_DELAY_WAI_12B (5000)
57 #define LIS3_PWRON_DELAY_WAI_8B (3000)
58
59 /*
60 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
61 * LIS302D spec says: 18 mG / digit
62 * LIS3_ACCURACY is used to increase accuracy of the intermediate
63 * calculation results.
64 */
65 #define LIS3_ACCURACY 1024
66 /* Sensitivity values for -2G +2G scale */
67 #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
68 #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
69
70 /*
71 * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG.
72 * Below macros defines sensitivity values for +/-2G. Dataout bits for
73 * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit
74 * data from 16bit value. Currently this driver supports only 2G range.
75 */
76 #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
77 #define SHIFT_ADJ_2G 4
78
79 #define LIS3_DEFAULT_FUZZ_12B 3
80 #define LIS3_DEFAULT_FLAT_12B 3
81 #define LIS3_DEFAULT_FUZZ_8B 1
82 #define LIS3_DEFAULT_FLAT_8B 1
83
84 struct lis3lv02d lis3_dev = {
85 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
86 };
87 EXPORT_SYMBOL_GPL(lis3_dev);
88
89 /* just like param_set_int() but does sanity-check so that it won't point
90 * over the axis array size
91 */
param_set_axis(const char * val,const struct kernel_param * kp)92 static int param_set_axis(const char *val, const struct kernel_param *kp)
93 {
94 int ret = param_set_int(val, kp);
95 if (!ret) {
96 int val = *(int *)kp->arg;
97 if (val < 0)
98 val = -val;
99 if (!val || val > 3)
100 return -EINVAL;
101 }
102 return ret;
103 }
104
105 static const struct kernel_param_ops param_ops_axis = {
106 .set = param_set_axis,
107 .get = param_get_int,
108 };
109
110 #define param_check_axis(name, p) param_check_int(name, p)
111
112 module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
113 MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
114
lis3lv02d_read_8(struct lis3lv02d * lis3,int reg)115 static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
116 {
117 s8 lo;
118 if (lis3->read(lis3, reg, &lo) < 0)
119 return 0;
120
121 return lo;
122 }
123
lis3lv02d_read_12(struct lis3lv02d * lis3,int reg)124 static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
125 {
126 u8 lo, hi;
127
128 lis3->read(lis3, reg - 1, &lo);
129 lis3->read(lis3, reg, &hi);
130 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
131 return (s16)((hi << 8) | lo);
132 }
133
134 /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */
lis331dlh_read_data(struct lis3lv02d * lis3,int reg)135 static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg)
136 {
137 u8 lo, hi;
138 int v;
139
140 lis3->read(lis3, reg - 1, &lo);
141 lis3->read(lis3, reg, &hi);
142 v = (int) ((hi << 8) | lo);
143
144 return (s16) v >> lis3->shift_adj;
145 }
146
147 /**
148 * lis3lv02d_get_axis - For the given axis, give the value converted
149 * @axis: 1,2,3 - can also be negative
150 * @hw_values: raw values returned by the hardware
151 *
152 * Returns the converted value.
153 */
lis3lv02d_get_axis(s8 axis,int hw_values[3])154 static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
155 {
156 if (axis > 0)
157 return hw_values[axis - 1];
158 else
159 return -hw_values[-axis - 1];
160 }
161
162 /**
163 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
164 * @lis3: pointer to the device struct
165 * @x: where to store the X axis value
166 * @y: where to store the Y axis value
167 * @z: where to store the Z axis value
168 *
169 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
170 */
lis3lv02d_get_xyz(struct lis3lv02d * lis3,int * x,int * y,int * z)171 static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
172 {
173 int position[3];
174 int i;
175
176 if (lis3->blkread) {
177 if (lis3->whoami == WAI_12B) {
178 u16 data[3];
179 lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
180 for (i = 0; i < 3; i++)
181 position[i] = (s16)le16_to_cpu(data[i]);
182 } else {
183 u8 data[5];
184 /* Data: x, dummy, y, dummy, z */
185 lis3->blkread(lis3, OUTX, 5, data);
186 for (i = 0; i < 3; i++)
187 position[i] = (s8)data[i * 2];
188 }
189 } else {
190 position[0] = lis3->read_data(lis3, OUTX);
191 position[1] = lis3->read_data(lis3, OUTY);
192 position[2] = lis3->read_data(lis3, OUTZ);
193 }
194
195 for (i = 0; i < 3; i++)
196 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
197
198 *x = lis3lv02d_get_axis(lis3->ac.x, position);
199 *y = lis3lv02d_get_axis(lis3->ac.y, position);
200 *z = lis3lv02d_get_axis(lis3->ac.z, position);
201 }
202
203 /* conversion btw sampling rate and the register values */
204 static int lis3_12_rates[4] = {40, 160, 640, 2560};
205 static int lis3_8_rates[2] = {100, 400};
206 static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
207 static int lis3_3dlh_rates[4] = {50, 100, 400, 1000};
208
209 /* ODR is Output Data Rate */
lis3lv02d_get_odr_index(struct lis3lv02d * lis3)210 static int lis3lv02d_get_odr_index(struct lis3lv02d *lis3)
211 {
212 u8 ctrl;
213 int shift;
214
215 lis3->read(lis3, CTRL_REG1, &ctrl);
216 ctrl &= lis3->odr_mask;
217 shift = ffs(lis3->odr_mask) - 1;
218 return (ctrl >> shift);
219 }
220
lis3lv02d_get_pwron_wait(struct lis3lv02d * lis3)221 static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3)
222 {
223 int odr_idx = lis3lv02d_get_odr_index(lis3);
224 int div = lis3->odrs[odr_idx];
225
226 if (div == 0) {
227 if (odr_idx == 0) {
228 /* Power-down mode, not sampling no need to sleep */
229 return 0;
230 }
231
232 dev_err(&lis3->fdev->dev, "Error unknown odrs-index: %d\n", odr_idx);
233 return -ENXIO;
234 }
235
236 /* LIS3 power on delay is quite long */
237 msleep(lis3->pwron_delay / div);
238 return 0;
239 }
240
lis3lv02d_set_odr(struct lis3lv02d * lis3,int rate)241 static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate)
242 {
243 u8 ctrl;
244 int i, len, shift;
245
246 if (!rate)
247 return -EINVAL;
248
249 lis3->read(lis3, CTRL_REG1, &ctrl);
250 ctrl &= ~lis3->odr_mask;
251 len = 1 << hweight_long(lis3->odr_mask); /* # of possible values */
252 shift = ffs(lis3->odr_mask) - 1;
253
254 for (i = 0; i < len; i++)
255 if (lis3->odrs[i] == rate) {
256 lis3->write(lis3, CTRL_REG1,
257 ctrl | (i << shift));
258 return 0;
259 }
260 return -EINVAL;
261 }
262
lis3lv02d_selftest(struct lis3lv02d * lis3,s16 results[3])263 static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
264 {
265 u8 ctlreg, reg;
266 s16 x, y, z;
267 u8 selftest;
268 int ret;
269 u8 ctrl_reg_data;
270 unsigned char irq_cfg;
271
272 mutex_lock(&lis3->mutex);
273
274 irq_cfg = lis3->irq_cfg;
275 if (lis3->whoami == WAI_8B) {
276 lis3->data_ready_count[IRQ_LINE0] = 0;
277 lis3->data_ready_count[IRQ_LINE1] = 0;
278
279 /* Change interrupt cfg to data ready for selftest */
280 atomic_inc(&lis3->wake_thread);
281 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
282 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
283 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
284 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
285 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
286 }
287
288 if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) {
289 ctlreg = CTRL_REG4;
290 selftest = CTRL4_ST0;
291 } else {
292 ctlreg = CTRL_REG1;
293 if (lis3->whoami == WAI_12B)
294 selftest = CTRL1_ST;
295 else
296 selftest = CTRL1_STP;
297 }
298
299 lis3->read(lis3, ctlreg, ®);
300 lis3->write(lis3, ctlreg, (reg | selftest));
301 ret = lis3lv02d_get_pwron_wait(lis3);
302 if (ret)
303 goto fail;
304
305 /* Read directly to avoid axis remap */
306 x = lis3->read_data(lis3, OUTX);
307 y = lis3->read_data(lis3, OUTY);
308 z = lis3->read_data(lis3, OUTZ);
309
310 /* back to normal settings */
311 lis3->write(lis3, ctlreg, reg);
312 ret = lis3lv02d_get_pwron_wait(lis3);
313 if (ret)
314 goto fail;
315
316 results[0] = x - lis3->read_data(lis3, OUTX);
317 results[1] = y - lis3->read_data(lis3, OUTY);
318 results[2] = z - lis3->read_data(lis3, OUTZ);
319
320 ret = 0;
321
322 if (lis3->whoami == WAI_8B) {
323 /* Restore original interrupt configuration */
324 atomic_dec(&lis3->wake_thread);
325 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
326 lis3->irq_cfg = irq_cfg;
327
328 if ((irq_cfg & LIS3_IRQ1_MASK) &&
329 lis3->data_ready_count[IRQ_LINE0] < 2) {
330 ret = SELFTEST_IRQ;
331 goto fail;
332 }
333
334 if ((irq_cfg & LIS3_IRQ2_MASK) &&
335 lis3->data_ready_count[IRQ_LINE1] < 2) {
336 ret = SELFTEST_IRQ;
337 goto fail;
338 }
339 }
340
341 if (lis3->pdata) {
342 int i;
343 for (i = 0; i < 3; i++) {
344 /* Check against selftest acceptance limits */
345 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
346 (results[i] > lis3->pdata->st_max_limits[i])) {
347 ret = SELFTEST_FAIL;
348 goto fail;
349 }
350 }
351 }
352
353 /* test passed */
354 fail:
355 mutex_unlock(&lis3->mutex);
356 return ret;
357 }
358
359 /*
360 * Order of registers in the list affects to order of the restore process.
361 * Perhaps it is a good idea to set interrupt enable register as a last one
362 * after all other configurations
363 */
364 static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
365 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
366 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
367 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
368 CTRL_REG1, CTRL_REG2, CTRL_REG3};
369
370 static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
371 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
372 DD_THSE_L, DD_THSE_H,
373 CTRL_REG1, CTRL_REG3, CTRL_REG2};
374
lis3_context_save(struct lis3lv02d * lis3)375 static inline void lis3_context_save(struct lis3lv02d *lis3)
376 {
377 int i;
378 for (i = 0; i < lis3->regs_size; i++)
379 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
380 lis3->regs_stored = true;
381 }
382
lis3_context_restore(struct lis3lv02d * lis3)383 static inline void lis3_context_restore(struct lis3lv02d *lis3)
384 {
385 int i;
386 if (lis3->regs_stored)
387 for (i = 0; i < lis3->regs_size; i++)
388 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
389 }
390
lis3lv02d_poweroff(struct lis3lv02d * lis3)391 void lis3lv02d_poweroff(struct lis3lv02d *lis3)
392 {
393 if (lis3->reg_ctrl)
394 lis3_context_save(lis3);
395 /* disable X,Y,Z axis and power down */
396 lis3->write(lis3, CTRL_REG1, 0x00);
397 if (lis3->reg_ctrl)
398 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
399 }
400 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
401
lis3lv02d_poweron(struct lis3lv02d * lis3)402 int lis3lv02d_poweron(struct lis3lv02d *lis3)
403 {
404 int err;
405 u8 reg;
406
407 lis3->init(lis3);
408
409 /*
410 * Common configuration
411 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
412 * both have been read. So the value read will always be correct.
413 * Set BOOT bit to refresh factory tuning values.
414 */
415 if (lis3->pdata) {
416 lis3->read(lis3, CTRL_REG2, ®);
417 if (lis3->whoami == WAI_12B)
418 reg |= CTRL2_BDU | CTRL2_BOOT;
419 else if (lis3->whoami == WAI_3DLH)
420 reg |= CTRL2_BOOT_3DLH;
421 else
422 reg |= CTRL2_BOOT_8B;
423 lis3->write(lis3, CTRL_REG2, reg);
424
425 if (lis3->whoami == WAI_3DLH) {
426 lis3->read(lis3, CTRL_REG4, ®);
427 reg |= CTRL4_BDU;
428 lis3->write(lis3, CTRL_REG4, reg);
429 }
430 }
431
432 err = lis3lv02d_get_pwron_wait(lis3);
433 if (err)
434 return err;
435
436 if (lis3->reg_ctrl)
437 lis3_context_restore(lis3);
438
439 return 0;
440 }
441 EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
442
443
lis3lv02d_joystick_poll(struct input_dev * input)444 static void lis3lv02d_joystick_poll(struct input_dev *input)
445 {
446 struct lis3lv02d *lis3 = input_get_drvdata(input);
447 int x, y, z;
448
449 mutex_lock(&lis3->mutex);
450 lis3lv02d_get_xyz(lis3, &x, &y, &z);
451 input_report_abs(input, ABS_X, x);
452 input_report_abs(input, ABS_Y, y);
453 input_report_abs(input, ABS_Z, z);
454 input_sync(input);
455 mutex_unlock(&lis3->mutex);
456 }
457
lis3lv02d_joystick_open(struct input_dev * input)458 static int lis3lv02d_joystick_open(struct input_dev *input)
459 {
460 struct lis3lv02d *lis3 = input_get_drvdata(input);
461
462 if (lis3->pm_dev)
463 pm_runtime_get_sync(lis3->pm_dev);
464
465 if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev)
466 atomic_set(&lis3->wake_thread, 1);
467 /*
468 * Update coordinates for the case where poll interval is 0 and
469 * the chip in running purely under interrupt control
470 */
471 lis3lv02d_joystick_poll(input);
472
473 return 0;
474 }
475
lis3lv02d_joystick_close(struct input_dev * input)476 static void lis3lv02d_joystick_close(struct input_dev *input)
477 {
478 struct lis3lv02d *lis3 = input_get_drvdata(input);
479
480 atomic_set(&lis3->wake_thread, 0);
481 if (lis3->pm_dev)
482 pm_runtime_put(lis3->pm_dev);
483 }
484
lis302dl_interrupt(int irq,void * data)485 static irqreturn_t lis302dl_interrupt(int irq, void *data)
486 {
487 struct lis3lv02d *lis3 = data;
488
489 if (!test_bit(0, &lis3->misc_opened))
490 goto out;
491
492 /*
493 * Be careful: on some HP laptops the bios force DD when on battery and
494 * the lid is closed. This leads to interrupts as soon as a little move
495 * is done.
496 */
497 atomic_inc(&lis3->count);
498
499 wake_up_interruptible(&lis3->misc_wait);
500 kill_fasync(&lis3->async_queue, SIGIO, POLL_IN);
501 out:
502 if (atomic_read(&lis3->wake_thread))
503 return IRQ_WAKE_THREAD;
504 return IRQ_HANDLED;
505 }
506
lis302dl_interrupt_handle_click(struct lis3lv02d * lis3)507 static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
508 {
509 struct input_dev *dev = lis3->idev;
510 u8 click_src;
511
512 mutex_lock(&lis3->mutex);
513 lis3->read(lis3, CLICK_SRC, &click_src);
514
515 if (click_src & CLICK_SINGLE_X) {
516 input_report_key(dev, lis3->mapped_btns[0], 1);
517 input_report_key(dev, lis3->mapped_btns[0], 0);
518 }
519
520 if (click_src & CLICK_SINGLE_Y) {
521 input_report_key(dev, lis3->mapped_btns[1], 1);
522 input_report_key(dev, lis3->mapped_btns[1], 0);
523 }
524
525 if (click_src & CLICK_SINGLE_Z) {
526 input_report_key(dev, lis3->mapped_btns[2], 1);
527 input_report_key(dev, lis3->mapped_btns[2], 0);
528 }
529 input_sync(dev);
530 mutex_unlock(&lis3->mutex);
531 }
532
lis302dl_data_ready(struct lis3lv02d * lis3,int index)533 static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
534 {
535 int dummy;
536
537 /* Dummy read to ack interrupt */
538 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
539 lis3->data_ready_count[index]++;
540 }
541
lis302dl_interrupt_thread1_8b(int irq,void * data)542 static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
543 {
544 struct lis3lv02d *lis3 = data;
545 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
546
547 if (irq_cfg == LIS3_IRQ1_CLICK)
548 lis302dl_interrupt_handle_click(lis3);
549 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
550 lis302dl_data_ready(lis3, IRQ_LINE0);
551 else
552 lis3lv02d_joystick_poll(lis3->idev);
553
554 return IRQ_HANDLED;
555 }
556
lis302dl_interrupt_thread2_8b(int irq,void * data)557 static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
558 {
559 struct lis3lv02d *lis3 = data;
560 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
561
562 if (irq_cfg == LIS3_IRQ2_CLICK)
563 lis302dl_interrupt_handle_click(lis3);
564 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
565 lis302dl_data_ready(lis3, IRQ_LINE1);
566 else
567 lis3lv02d_joystick_poll(lis3->idev);
568
569 return IRQ_HANDLED;
570 }
571
lis3lv02d_misc_open(struct inode * inode,struct file * file)572 static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
573 {
574 struct lis3lv02d *lis3 = container_of(file->private_data,
575 struct lis3lv02d, miscdev);
576
577 if (test_and_set_bit(0, &lis3->misc_opened))
578 return -EBUSY; /* already open */
579
580 if (lis3->pm_dev)
581 pm_runtime_get_sync(lis3->pm_dev);
582
583 atomic_set(&lis3->count, 0);
584 return 0;
585 }
586
lis3lv02d_misc_release(struct inode * inode,struct file * file)587 static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
588 {
589 struct lis3lv02d *lis3 = container_of(file->private_data,
590 struct lis3lv02d, miscdev);
591
592 clear_bit(0, &lis3->misc_opened); /* release the device */
593 if (lis3->pm_dev)
594 pm_runtime_put(lis3->pm_dev);
595 return 0;
596 }
597
lis3lv02d_misc_read(struct file * file,char __user * buf,size_t count,loff_t * pos)598 static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
599 size_t count, loff_t *pos)
600 {
601 struct lis3lv02d *lis3 = container_of(file->private_data,
602 struct lis3lv02d, miscdev);
603
604 DECLARE_WAITQUEUE(wait, current);
605 u32 data;
606 unsigned char byte_data;
607 ssize_t retval = 1;
608
609 if (count < 1)
610 return -EINVAL;
611
612 add_wait_queue(&lis3->misc_wait, &wait);
613 while (true) {
614 set_current_state(TASK_INTERRUPTIBLE);
615 data = atomic_xchg(&lis3->count, 0);
616 if (data)
617 break;
618
619 if (file->f_flags & O_NONBLOCK) {
620 retval = -EAGAIN;
621 goto out;
622 }
623
624 if (signal_pending(current)) {
625 retval = -ERESTARTSYS;
626 goto out;
627 }
628
629 schedule();
630 }
631
632 if (data < 255)
633 byte_data = data;
634 else
635 byte_data = 255;
636
637 /* make sure we are not going into copy_to_user() with
638 * TASK_INTERRUPTIBLE state */
639 set_current_state(TASK_RUNNING);
640 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
641 retval = -EFAULT;
642
643 out:
644 __set_current_state(TASK_RUNNING);
645 remove_wait_queue(&lis3->misc_wait, &wait);
646
647 return retval;
648 }
649
lis3lv02d_misc_poll(struct file * file,poll_table * wait)650 static __poll_t lis3lv02d_misc_poll(struct file *file, poll_table *wait)
651 {
652 struct lis3lv02d *lis3 = container_of(file->private_data,
653 struct lis3lv02d, miscdev);
654
655 poll_wait(file, &lis3->misc_wait, wait);
656 if (atomic_read(&lis3->count))
657 return EPOLLIN | EPOLLRDNORM;
658 return 0;
659 }
660
lis3lv02d_misc_fasync(int fd,struct file * file,int on)661 static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
662 {
663 struct lis3lv02d *lis3 = container_of(file->private_data,
664 struct lis3lv02d, miscdev);
665
666 return fasync_helper(fd, file, on, &lis3->async_queue);
667 }
668
669 static const struct file_operations lis3lv02d_misc_fops = {
670 .owner = THIS_MODULE,
671 .read = lis3lv02d_misc_read,
672 .open = lis3lv02d_misc_open,
673 .release = lis3lv02d_misc_release,
674 .poll = lis3lv02d_misc_poll,
675 .fasync = lis3lv02d_misc_fasync,
676 };
677
lis3lv02d_joystick_enable(struct lis3lv02d * lis3)678 int lis3lv02d_joystick_enable(struct lis3lv02d *lis3)
679 {
680 struct input_dev *input_dev;
681 int err;
682 int max_val, fuzz, flat;
683 int btns[] = {BTN_X, BTN_Y, BTN_Z};
684
685 if (lis3->idev)
686 return -EINVAL;
687
688 input_dev = input_allocate_device();
689 if (!input_dev)
690 return -ENOMEM;
691
692 input_dev->name = "ST LIS3LV02DL Accelerometer";
693 input_dev->phys = DRIVER_NAME "/input0";
694 input_dev->id.bustype = BUS_HOST;
695 input_dev->id.vendor = 0;
696 input_dev->dev.parent = &lis3->fdev->dev;
697
698 input_dev->open = lis3lv02d_joystick_open;
699 input_dev->close = lis3lv02d_joystick_close;
700
701 max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY;
702 if (lis3->whoami == WAI_12B) {
703 fuzz = LIS3_DEFAULT_FUZZ_12B;
704 flat = LIS3_DEFAULT_FLAT_12B;
705 } else {
706 fuzz = LIS3_DEFAULT_FUZZ_8B;
707 flat = LIS3_DEFAULT_FLAT_8B;
708 }
709 fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY;
710 flat = (flat * lis3->scale) / LIS3_ACCURACY;
711
712 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
713 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
714 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
715
716 input_set_drvdata(input_dev, lis3);
717 lis3->idev = input_dev;
718
719 err = input_setup_polling(input_dev, lis3lv02d_joystick_poll);
720 if (err)
721 goto err_free_input;
722
723 input_set_poll_interval(input_dev, MDPS_POLL_INTERVAL);
724 input_set_min_poll_interval(input_dev, MDPS_POLL_MIN);
725 input_set_max_poll_interval(input_dev, MDPS_POLL_MAX);
726
727 lis3->mapped_btns[0] = lis3lv02d_get_axis(abs(lis3->ac.x), btns);
728 lis3->mapped_btns[1] = lis3lv02d_get_axis(abs(lis3->ac.y), btns);
729 lis3->mapped_btns[2] = lis3lv02d_get_axis(abs(lis3->ac.z), btns);
730
731 err = input_register_device(lis3->idev);
732 if (err)
733 goto err_free_input;
734
735 return 0;
736
737 err_free_input:
738 input_free_device(input_dev);
739 lis3->idev = NULL;
740 return err;
741
742 }
743 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
744
lis3lv02d_joystick_disable(struct lis3lv02d * lis3)745 void lis3lv02d_joystick_disable(struct lis3lv02d *lis3)
746 {
747 if (lis3->irq)
748 free_irq(lis3->irq, lis3);
749 if (lis3->pdata && lis3->pdata->irq2)
750 free_irq(lis3->pdata->irq2, lis3);
751
752 if (!lis3->idev)
753 return;
754
755 if (lis3->irq)
756 misc_deregister(&lis3->miscdev);
757 input_unregister_device(lis3->idev);
758 lis3->idev = NULL;
759 }
760 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
761
762 /* Sysfs stuff */
lis3lv02d_sysfs_poweron(struct lis3lv02d * lis3)763 static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
764 {
765 /*
766 * SYSFS functions are fast visitors so put-call
767 * immediately after the get-call. However, keep
768 * chip running for a while and schedule delayed
769 * suspend. This way periodic sysfs calls doesn't
770 * suffer from relatively long power up time.
771 */
772
773 if (lis3->pm_dev) {
774 pm_runtime_get_sync(lis3->pm_dev);
775 pm_runtime_put_noidle(lis3->pm_dev);
776 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
777 }
778 }
779
lis3lv02d_selftest_show(struct device * dev,struct device_attribute * attr,char * buf)780 static ssize_t lis3lv02d_selftest_show(struct device *dev,
781 struct device_attribute *attr, char *buf)
782 {
783 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
784 s16 values[3];
785
786 static const char ok[] = "OK";
787 static const char fail[] = "FAIL";
788 static const char irq[] = "FAIL_IRQ";
789 const char *res;
790
791 lis3lv02d_sysfs_poweron(lis3);
792 switch (lis3lv02d_selftest(lis3, values)) {
793 case SELFTEST_FAIL:
794 res = fail;
795 break;
796 case SELFTEST_IRQ:
797 res = irq;
798 break;
799 case SELFTEST_OK:
800 default:
801 res = ok;
802 break;
803 }
804 return sprintf(buf, "%s %d %d %d\n", res,
805 values[0], values[1], values[2]);
806 }
807
lis3lv02d_position_show(struct device * dev,struct device_attribute * attr,char * buf)808 static ssize_t lis3lv02d_position_show(struct device *dev,
809 struct device_attribute *attr, char *buf)
810 {
811 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
812 int x, y, z;
813
814 lis3lv02d_sysfs_poweron(lis3);
815 mutex_lock(&lis3->mutex);
816 lis3lv02d_get_xyz(lis3, &x, &y, &z);
817 mutex_unlock(&lis3->mutex);
818 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
819 }
820
lis3lv02d_rate_show(struct device * dev,struct device_attribute * attr,char * buf)821 static ssize_t lis3lv02d_rate_show(struct device *dev,
822 struct device_attribute *attr, char *buf)
823 {
824 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
825 int odr_idx;
826
827 lis3lv02d_sysfs_poweron(lis3);
828
829 odr_idx = lis3lv02d_get_odr_index(lis3);
830 return sprintf(buf, "%d\n", lis3->odrs[odr_idx]);
831 }
832
lis3lv02d_rate_set(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)833 static ssize_t lis3lv02d_rate_set(struct device *dev,
834 struct device_attribute *attr, const char *buf,
835 size_t count)
836 {
837 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
838 unsigned long rate;
839 int ret;
840
841 ret = kstrtoul(buf, 0, &rate);
842 if (ret)
843 return ret;
844
845 lis3lv02d_sysfs_poweron(lis3);
846 if (lis3lv02d_set_odr(lis3, rate))
847 return -EINVAL;
848
849 return count;
850 }
851
852 static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
853 static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
854 static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
855 lis3lv02d_rate_set);
856
857 static struct attribute *lis3lv02d_attrs[] = {
858 &dev_attr_selftest.attr,
859 &dev_attr_position.attr,
860 &dev_attr_rate.attr,
861 NULL
862 };
863 ATTRIBUTE_GROUPS(lis3lv02d);
864
lis3lv02d_add_fs(struct lis3lv02d * lis3)865 static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
866 {
867 lis3->fdev = faux_device_create_with_groups(DRIVER_NAME, NULL, NULL, lis3lv02d_groups);
868 if (!lis3->fdev)
869 return -ENODEV;
870
871 faux_device_set_drvdata(lis3->fdev, lis3);
872 return 0;
873 }
874
lis3lv02d_remove_fs(struct lis3lv02d * lis3)875 void lis3lv02d_remove_fs(struct lis3lv02d *lis3)
876 {
877 faux_device_destroy(lis3->fdev);
878 if (lis3->pm_dev) {
879 /* Barrier after the sysfs remove */
880 pm_runtime_barrier(lis3->pm_dev);
881
882 /* SYSFS may have left chip running. Turn off if necessary */
883 if (!pm_runtime_suspended(lis3->pm_dev))
884 lis3lv02d_poweroff(lis3);
885
886 pm_runtime_disable(lis3->pm_dev);
887 pm_runtime_set_suspended(lis3->pm_dev);
888 }
889 kfree(lis3->reg_cache);
890 }
891 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
892
lis3lv02d_8b_configure(struct lis3lv02d * lis3,struct lis3lv02d_platform_data * p)893 static void lis3lv02d_8b_configure(struct lis3lv02d *lis3,
894 struct lis3lv02d_platform_data *p)
895 {
896 int err;
897 int ctrl2 = p->hipass_ctrl;
898
899 if (p->click_flags) {
900 lis3->write(lis3, CLICK_CFG, p->click_flags);
901 lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit);
902 lis3->write(lis3, CLICK_LATENCY, p->click_latency);
903 lis3->write(lis3, CLICK_WINDOW, p->click_window);
904 lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf);
905 lis3->write(lis3, CLICK_THSY_X,
906 (p->click_thresh_x & 0xf) |
907 (p->click_thresh_y << 4));
908
909 if (lis3->idev) {
910 input_set_capability(lis3->idev, EV_KEY, BTN_X);
911 input_set_capability(lis3->idev, EV_KEY, BTN_Y);
912 input_set_capability(lis3->idev, EV_KEY, BTN_Z);
913 }
914 }
915
916 if (p->wakeup_flags) {
917 lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags);
918 lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
919 /* pdata value + 1 to keep this backward compatible*/
920 lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1);
921 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
922 }
923
924 if (p->wakeup_flags2) {
925 lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2);
926 lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
927 /* pdata value + 1 to keep this backward compatible*/
928 lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1);
929 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
930 }
931 /* Configure hipass filters */
932 lis3->write(lis3, CTRL_REG2, ctrl2);
933
934 if (p->irq2) {
935 err = request_threaded_irq(p->irq2,
936 NULL,
937 lis302dl_interrupt_thread2_8b,
938 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
939 (p->irq_flags2 & IRQF_TRIGGER_MASK),
940 DRIVER_NAME, lis3);
941 if (err < 0)
942 pr_err("No second IRQ. Limited functionality\n");
943 }
944 }
945
946 #ifdef CONFIG_OF
lis3lv02d_init_dt(struct lis3lv02d * lis3)947 int lis3lv02d_init_dt(struct lis3lv02d *lis3)
948 {
949 struct lis3lv02d_platform_data *pdata;
950 struct device_node *np = lis3->of_node;
951 u32 val;
952 s32 sval;
953
954 if (!lis3->of_node)
955 return 0;
956
957 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
958 if (!pdata)
959 return -ENOMEM;
960
961 if (of_property_read_bool(np, "st,click-single-x"))
962 pdata->click_flags |= LIS3_CLICK_SINGLE_X;
963 if (of_property_read_bool(np, "st,click-double-x"))
964 pdata->click_flags |= LIS3_CLICK_DOUBLE_X;
965
966 if (of_property_read_bool(np, "st,click-single-y"))
967 pdata->click_flags |= LIS3_CLICK_SINGLE_Y;
968 if (of_property_read_bool(np, "st,click-double-y"))
969 pdata->click_flags |= LIS3_CLICK_DOUBLE_Y;
970
971 if (of_property_read_bool(np, "st,click-single-z"))
972 pdata->click_flags |= LIS3_CLICK_SINGLE_Z;
973 if (of_property_read_bool(np, "st,click-double-z"))
974 pdata->click_flags |= LIS3_CLICK_DOUBLE_Z;
975
976 if (!of_property_read_u32(np, "st,click-threshold-x", &val))
977 pdata->click_thresh_x = val;
978 if (!of_property_read_u32(np, "st,click-threshold-y", &val))
979 pdata->click_thresh_y = val;
980 if (!of_property_read_u32(np, "st,click-threshold-z", &val))
981 pdata->click_thresh_z = val;
982
983 if (!of_property_read_u32(np, "st,click-time-limit", &val))
984 pdata->click_time_limit = val;
985 if (!of_property_read_u32(np, "st,click-latency", &val))
986 pdata->click_latency = val;
987 if (!of_property_read_u32(np, "st,click-window", &val))
988 pdata->click_window = val;
989
990 if (of_property_read_bool(np, "st,irq1-disable"))
991 pdata->irq_cfg |= LIS3_IRQ1_DISABLE;
992 if (of_property_read_bool(np, "st,irq1-ff-wu-1"))
993 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1;
994 if (of_property_read_bool(np, "st,irq1-ff-wu-2"))
995 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2;
996 if (of_property_read_bool(np, "st,irq1-data-ready"))
997 pdata->irq_cfg |= LIS3_IRQ1_DATA_READY;
998 if (of_property_read_bool(np, "st,irq1-click"))
999 pdata->irq_cfg |= LIS3_IRQ1_CLICK;
1000
1001 if (of_property_read_bool(np, "st,irq2-disable"))
1002 pdata->irq_cfg |= LIS3_IRQ2_DISABLE;
1003 if (of_property_read_bool(np, "st,irq2-ff-wu-1"))
1004 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1;
1005 if (of_property_read_bool(np, "st,irq2-ff-wu-2"))
1006 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2;
1007 if (of_property_read_bool(np, "st,irq2-data-ready"))
1008 pdata->irq_cfg |= LIS3_IRQ2_DATA_READY;
1009 if (of_property_read_bool(np, "st,irq2-click"))
1010 pdata->irq_cfg |= LIS3_IRQ2_CLICK;
1011
1012 if (of_property_read_bool(np, "st,irq-open-drain"))
1013 pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN;
1014 if (of_property_read_bool(np, "st,irq-active-low"))
1015 pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW;
1016
1017 if (!of_property_read_u32(np, "st,wu-duration-1", &val))
1018 pdata->duration1 = val;
1019 if (!of_property_read_u32(np, "st,wu-duration-2", &val))
1020 pdata->duration2 = val;
1021
1022 if (of_property_read_bool(np, "st,wakeup-x-lo"))
1023 pdata->wakeup_flags |= LIS3_WAKEUP_X_LO;
1024 if (of_property_read_bool(np, "st,wakeup-x-hi"))
1025 pdata->wakeup_flags |= LIS3_WAKEUP_X_HI;
1026 if (of_property_read_bool(np, "st,wakeup-y-lo"))
1027 pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO;
1028 if (of_property_read_bool(np, "st,wakeup-y-hi"))
1029 pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI;
1030 if (of_property_read_bool(np, "st,wakeup-z-lo"))
1031 pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO;
1032 if (of_property_read_bool(np, "st,wakeup-z-hi"))
1033 pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI;
1034 if (!of_property_read_u32(np, "st,wakeup-threshold", &val))
1035 pdata->wakeup_thresh = val;
1036
1037 if (of_property_read_bool(np, "st,wakeup2-x-lo"))
1038 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_LO;
1039 if (of_property_read_bool(np, "st,wakeup2-x-hi"))
1040 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_HI;
1041 if (of_property_read_bool(np, "st,wakeup2-y-lo"))
1042 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_LO;
1043 if (of_property_read_bool(np, "st,wakeup2-y-hi"))
1044 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_HI;
1045 if (of_property_read_bool(np, "st,wakeup2-z-lo"))
1046 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_LO;
1047 if (of_property_read_bool(np, "st,wakeup2-z-hi"))
1048 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_HI;
1049 if (!of_property_read_u32(np, "st,wakeup2-threshold", &val))
1050 pdata->wakeup_thresh2 = val;
1051
1052 if (!of_property_read_u32(np, "st,highpass-cutoff-hz", &val)) {
1053 switch (val) {
1054 case 1:
1055 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ;
1056 break;
1057 case 2:
1058 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ;
1059 break;
1060 case 4:
1061 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ;
1062 break;
1063 case 8:
1064 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ;
1065 break;
1066 }
1067 }
1068
1069 if (of_property_read_bool(np, "st,hipass1-disable"))
1070 pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE;
1071 if (of_property_read_bool(np, "st,hipass2-disable"))
1072 pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE;
1073
1074 if (of_property_read_s32(np, "st,axis-x", &sval) == 0)
1075 pdata->axis_x = sval;
1076 if (of_property_read_s32(np, "st,axis-y", &sval) == 0)
1077 pdata->axis_y = sval;
1078 if (of_property_read_s32(np, "st,axis-z", &sval) == 0)
1079 pdata->axis_z = sval;
1080
1081 if (of_property_read_u32(np, "st,default-rate", &val) == 0)
1082 pdata->default_rate = val;
1083
1084 if (of_property_read_s32(np, "st,min-limit-x", &sval) == 0)
1085 pdata->st_min_limits[0] = sval;
1086 if (of_property_read_s32(np, "st,min-limit-y", &sval) == 0)
1087 pdata->st_min_limits[1] = sval;
1088 if (of_property_read_s32(np, "st,min-limit-z", &sval) == 0)
1089 pdata->st_min_limits[2] = sval;
1090
1091 if (of_property_read_s32(np, "st,max-limit-x", &sval) == 0)
1092 pdata->st_max_limits[0] = sval;
1093 if (of_property_read_s32(np, "st,max-limit-y", &sval) == 0)
1094 pdata->st_max_limits[1] = sval;
1095 if (of_property_read_s32(np, "st,max-limit-z", &sval) == 0)
1096 pdata->st_max_limits[2] = sval;
1097
1098
1099 lis3->pdata = pdata;
1100
1101 return 0;
1102 }
1103
1104 #else
lis3lv02d_init_dt(struct lis3lv02d * lis3)1105 int lis3lv02d_init_dt(struct lis3lv02d *lis3)
1106 {
1107 return 0;
1108 }
1109 #endif
1110 EXPORT_SYMBOL_GPL(lis3lv02d_init_dt);
1111
1112 /*
1113 * Initialise the accelerometer and the various subsystems.
1114 * Should be rather independent of the bus system.
1115 */
lis3lv02d_init_device(struct lis3lv02d * lis3)1116 int lis3lv02d_init_device(struct lis3lv02d *lis3)
1117 {
1118 int err;
1119 irq_handler_t thread_fn;
1120 int irq_flags = 0;
1121
1122 lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I);
1123
1124 switch (lis3->whoami) {
1125 case WAI_12B:
1126 pr_info("12 bits sensor found\n");
1127 lis3->read_data = lis3lv02d_read_12;
1128 lis3->mdps_max_val = 2048;
1129 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
1130 lis3->odrs = lis3_12_rates;
1131 lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1;
1132 lis3->scale = LIS3_SENSITIVITY_12B;
1133 lis3->regs = lis3_wai12_regs;
1134 lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs);
1135 break;
1136 case WAI_8B:
1137 pr_info("8 bits sensor found\n");
1138 lis3->read_data = lis3lv02d_read_8;
1139 lis3->mdps_max_val = 128;
1140 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1141 lis3->odrs = lis3_8_rates;
1142 lis3->odr_mask = CTRL1_DR;
1143 lis3->scale = LIS3_SENSITIVITY_8B;
1144 lis3->regs = lis3_wai8_regs;
1145 lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs);
1146 break;
1147 case WAI_3DC:
1148 pr_info("8 bits 3DC sensor found\n");
1149 lis3->read_data = lis3lv02d_read_8;
1150 lis3->mdps_max_val = 128;
1151 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1152 lis3->odrs = lis3_3dc_rates;
1153 lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
1154 lis3->scale = LIS3_SENSITIVITY_8B;
1155 break;
1156 case WAI_3DLH:
1157 pr_info("16 bits lis331dlh sensor found\n");
1158 lis3->read_data = lis331dlh_read_data;
1159 lis3->mdps_max_val = 2048; /* 12 bits for 2G */
1160 lis3->shift_adj = SHIFT_ADJ_2G;
1161 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1162 lis3->odrs = lis3_3dlh_rates;
1163 lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1;
1164 lis3->scale = LIS3DLH_SENSITIVITY_2G;
1165 break;
1166 default:
1167 pr_err("unknown sensor type 0x%X\n", lis3->whoami);
1168 return -ENODEV;
1169 }
1170
1171 lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
1172 sizeof(lis3_wai12_regs)), GFP_KERNEL);
1173
1174 if (lis3->reg_cache == NULL)
1175 return -ENOMEM;
1176
1177 mutex_init(&lis3->mutex);
1178 atomic_set(&lis3->wake_thread, 0);
1179
1180 lis3lv02d_add_fs(lis3);
1181 err = lis3lv02d_poweron(lis3);
1182 if (err) {
1183 lis3lv02d_remove_fs(lis3);
1184 return err;
1185 }
1186
1187 if (lis3->pm_dev) {
1188 pm_runtime_set_active(lis3->pm_dev);
1189 pm_runtime_enable(lis3->pm_dev);
1190 }
1191
1192 if (lis3lv02d_joystick_enable(lis3))
1193 pr_err("joystick initialization failed\n");
1194
1195 /* passing in platform specific data is purely optional and only
1196 * used by the SPI transport layer at the moment */
1197 if (lis3->pdata) {
1198 struct lis3lv02d_platform_data *p = lis3->pdata;
1199
1200 if (lis3->whoami == WAI_8B)
1201 lis3lv02d_8b_configure(lis3, p);
1202
1203 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
1204
1205 lis3->irq_cfg = p->irq_cfg;
1206 if (p->irq_cfg)
1207 lis3->write(lis3, CTRL_REG3, p->irq_cfg);
1208
1209 if (p->default_rate)
1210 lis3lv02d_set_odr(lis3, p->default_rate);
1211 }
1212
1213 /* bail if we did not get an IRQ from the bus layer */
1214 if (!lis3->irq) {
1215 pr_debug("No IRQ. Disabling /dev/freefall\n");
1216 goto out;
1217 }
1218
1219 /*
1220 * The sensor can generate interrupts for free-fall and direction
1221 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
1222 * the things simple and _fast_ we activate it only for free-fall, so
1223 * no need to read register (very slow with ACPI). For the same reason,
1224 * we forbid shared interrupts.
1225 *
1226 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
1227 * io-apic is not configurable (and generates a warning) but I keep it
1228 * in case of support for other hardware.
1229 */
1230 if (lis3->pdata && lis3->whoami == WAI_8B)
1231 thread_fn = lis302dl_interrupt_thread1_8b;
1232 else
1233 thread_fn = NULL;
1234
1235 err = request_threaded_irq(lis3->irq, lis302dl_interrupt,
1236 thread_fn,
1237 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
1238 irq_flags,
1239 DRIVER_NAME, lis3);
1240
1241 if (err < 0) {
1242 pr_err("Cannot get IRQ\n");
1243 goto out;
1244 }
1245
1246 lis3->miscdev.minor = MISC_DYNAMIC_MINOR;
1247 lis3->miscdev.name = "freefall";
1248 lis3->miscdev.fops = &lis3lv02d_misc_fops;
1249
1250 if (misc_register(&lis3->miscdev))
1251 pr_err("misc_register failed\n");
1252 out:
1253 return 0;
1254 }
1255 EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
1256
1257 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1258 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1259 MODULE_LICENSE("GPL");
1260