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22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/kernel.h>
26#include <linux/sched/signal.h>
27#include <linux/dmi.h>
28#include <linux/module.h>
29#include <linux/types.h>
30#include <linux/platform_device.h>
31#include <linux/interrupt.h>
32#include <linux/input-polldev.h>
33#include <linux/delay.h>
34#include <linux/wait.h>
35#include <linux/poll.h>
36#include <linux/slab.h>
37#include <linux/freezer.h>
38#include <linux/uaccess.h>
39#include <linux/miscdevice.h>
40#include <linux/pm_runtime.h>
41#include <linux/atomic.h>
42#include <linux/of_device.h>
43#include "lis3lv02d.h"
44
45#define DRIVER_NAME "lis3lv02d"
46
47
48#define MDPS_POLL_INTERVAL 50
49#define MDPS_POLL_MIN 0
50#define MDPS_POLL_MAX 2000
51
52#define LIS3_SYSFS_POWERDOWN_DELAY 5000
53
54#define SELFTEST_OK 0
55#define SELFTEST_FAIL -1
56#define SELFTEST_IRQ -2
57
58#define IRQ_LINE0 0
59#define IRQ_LINE1 1
60
61
62
63
64
65
66
67
68
69
70#define LIS3_PWRON_DELAY_WAI_12B (5000)
71#define LIS3_PWRON_DELAY_WAI_8B (3000)
72
73
74
75
76
77
78
79#define LIS3_ACCURACY 1024
80
81#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
82#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
83
84
85
86
87
88
89
90#define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
91#define SHIFT_ADJ_2G 4
92
93#define LIS3_DEFAULT_FUZZ_12B 3
94#define LIS3_DEFAULT_FLAT_12B 3
95#define LIS3_DEFAULT_FUZZ_8B 1
96#define LIS3_DEFAULT_FLAT_8B 1
97
98struct lis3lv02d lis3_dev = {
99 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
100};
101EXPORT_SYMBOL_GPL(lis3_dev);
102
103
104
105
106static int param_set_axis(const char *val, const struct kernel_param *kp)
107{
108 int ret = param_set_int(val, kp);
109 if (!ret) {
110 int val = *(int *)kp->arg;
111 if (val < 0)
112 val = -val;
113 if (!val || val > 3)
114 return -EINVAL;
115 }
116 return ret;
117}
118
119static const struct kernel_param_ops param_ops_axis = {
120 .set = param_set_axis,
121 .get = param_get_int,
122};
123
124#define param_check_axis(name, p) param_check_int(name, p)
125
126module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
127MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
128
129static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
130{
131 s8 lo;
132 if (lis3->read(lis3, reg, &lo) < 0)
133 return 0;
134
135 return lo;
136}
137
138static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
139{
140 u8 lo, hi;
141
142 lis3->read(lis3, reg - 1, &lo);
143 lis3->read(lis3, reg, &hi);
144
145 return (s16)((hi << 8) | lo);
146}
147
148
149static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg)
150{
151 u8 lo, hi;
152 int v;
153
154 lis3->read(lis3, reg - 1, &lo);
155 lis3->read(lis3, reg, &hi);
156 v = (int) ((hi << 8) | lo);
157
158 return (s16) v >> lis3->shift_adj;
159}
160
161
162
163
164
165
166
167
168static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
169{
170 if (axis > 0)
171 return hw_values[axis - 1];
172 else
173 return -hw_values[-axis - 1];
174}
175
176
177
178
179
180
181
182
183
184
185static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
186{
187 int position[3];
188 int i;
189
190 if (lis3->blkread) {
191 if (lis3->whoami == WAI_12B) {
192 u16 data[3];
193 lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
194 for (i = 0; i < 3; i++)
195 position[i] = (s16)le16_to_cpu(data[i]);
196 } else {
197 u8 data[5];
198
199 lis3->blkread(lis3, OUTX, 5, data);
200 for (i = 0; i < 3; i++)
201 position[i] = (s8)data[i * 2];
202 }
203 } else {
204 position[0] = lis3->read_data(lis3, OUTX);
205 position[1] = lis3->read_data(lis3, OUTY);
206 position[2] = lis3->read_data(lis3, OUTZ);
207 }
208
209 for (i = 0; i < 3; i++)
210 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
211
212 *x = lis3lv02d_get_axis(lis3->ac.x, position);
213 *y = lis3lv02d_get_axis(lis3->ac.y, position);
214 *z = lis3lv02d_get_axis(lis3->ac.z, position);
215}
216
217
218static int lis3_12_rates[4] = {40, 160, 640, 2560};
219static int lis3_8_rates[2] = {100, 400};
220static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
221static int lis3_3dlh_rates[4] = {50, 100, 400, 1000};
222
223
224static int lis3lv02d_get_odr(struct lis3lv02d *lis3)
225{
226 u8 ctrl;
227 int shift;
228
229 lis3->read(lis3, CTRL_REG1, &ctrl);
230 ctrl &= lis3->odr_mask;
231 shift = ffs(lis3->odr_mask) - 1;
232 return lis3->odrs[(ctrl >> shift)];
233}
234
235static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3)
236{
237 int div = lis3lv02d_get_odr(lis3);
238
239 if (WARN_ONCE(div == 0, "device returned spurious data"))
240 return -ENXIO;
241
242
243 msleep(lis3->pwron_delay / div);
244 return 0;
245}
246
247static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate)
248{
249 u8 ctrl;
250 int i, len, shift;
251
252 if (!rate)
253 return -EINVAL;
254
255 lis3->read(lis3, CTRL_REG1, &ctrl);
256 ctrl &= ~lis3->odr_mask;
257 len = 1 << hweight_long(lis3->odr_mask);
258 shift = ffs(lis3->odr_mask) - 1;
259
260 for (i = 0; i < len; i++)
261 if (lis3->odrs[i] == rate) {
262 lis3->write(lis3, CTRL_REG1,
263 ctrl | (i << shift));
264 return 0;
265 }
266 return -EINVAL;
267}
268
269static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
270{
271 u8 ctlreg, reg;
272 s16 x, y, z;
273 u8 selftest;
274 int ret;
275 u8 ctrl_reg_data;
276 unsigned char irq_cfg;
277
278 mutex_lock(&lis3->mutex);
279
280 irq_cfg = lis3->irq_cfg;
281 if (lis3->whoami == WAI_8B) {
282 lis3->data_ready_count[IRQ_LINE0] = 0;
283 lis3->data_ready_count[IRQ_LINE1] = 0;
284
285
286 atomic_inc(&lis3->wake_thread);
287 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
288 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
289 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
290 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
291 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
292 }
293
294 if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) {
295 ctlreg = CTRL_REG4;
296 selftest = CTRL4_ST0;
297 } else {
298 ctlreg = CTRL_REG1;
299 if (lis3->whoami == WAI_12B)
300 selftest = CTRL1_ST;
301 else
302 selftest = CTRL1_STP;
303 }
304
305 lis3->read(lis3, ctlreg, ®);
306 lis3->write(lis3, ctlreg, (reg | selftest));
307 ret = lis3lv02d_get_pwron_wait(lis3);
308 if (ret)
309 goto fail;
310
311
312 x = lis3->read_data(lis3, OUTX);
313 y = lis3->read_data(lis3, OUTY);
314 z = lis3->read_data(lis3, OUTZ);
315
316
317 lis3->write(lis3, ctlreg, reg);
318 ret = lis3lv02d_get_pwron_wait(lis3);
319 if (ret)
320 goto fail;
321
322 results[0] = x - lis3->read_data(lis3, OUTX);
323 results[1] = y - lis3->read_data(lis3, OUTY);
324 results[2] = z - lis3->read_data(lis3, OUTZ);
325
326 ret = 0;
327
328 if (lis3->whoami == WAI_8B) {
329
330 atomic_dec(&lis3->wake_thread);
331 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
332 lis3->irq_cfg = irq_cfg;
333
334 if ((irq_cfg & LIS3_IRQ1_MASK) &&
335 lis3->data_ready_count[IRQ_LINE0] < 2) {
336 ret = SELFTEST_IRQ;
337 goto fail;
338 }
339
340 if ((irq_cfg & LIS3_IRQ2_MASK) &&
341 lis3->data_ready_count[IRQ_LINE1] < 2) {
342 ret = SELFTEST_IRQ;
343 goto fail;
344 }
345 }
346
347 if (lis3->pdata) {
348 int i;
349 for (i = 0; i < 3; i++) {
350
351 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
352 (results[i] > lis3->pdata->st_max_limits[i])) {
353 ret = SELFTEST_FAIL;
354 goto fail;
355 }
356 }
357 }
358
359
360fail:
361 mutex_unlock(&lis3->mutex);
362 return ret;
363}
364
365
366
367
368
369
370static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
371 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
372 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
373 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
374 CTRL_REG1, CTRL_REG2, CTRL_REG3};
375
376static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
377 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
378 DD_THSE_L, DD_THSE_H,
379 CTRL_REG1, CTRL_REG3, CTRL_REG2};
380
381static inline void lis3_context_save(struct lis3lv02d *lis3)
382{
383 int i;
384 for (i = 0; i < lis3->regs_size; i++)
385 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
386 lis3->regs_stored = true;
387}
388
389static inline void lis3_context_restore(struct lis3lv02d *lis3)
390{
391 int i;
392 if (lis3->regs_stored)
393 for (i = 0; i < lis3->regs_size; i++)
394 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
395}
396
397void lis3lv02d_poweroff(struct lis3lv02d *lis3)
398{
399 if (lis3->reg_ctrl)
400 lis3_context_save(lis3);
401
402 lis3->write(lis3, CTRL_REG1, 0x00);
403 if (lis3->reg_ctrl)
404 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
405}
406EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
407
408int lis3lv02d_poweron(struct lis3lv02d *lis3)
409{
410 int err;
411 u8 reg;
412
413 lis3->init(lis3);
414
415
416
417
418
419
420
421 if (lis3->pdata) {
422 lis3->read(lis3, CTRL_REG2, ®);
423 if (lis3->whoami == WAI_12B)
424 reg |= CTRL2_BDU | CTRL2_BOOT;
425 else if (lis3->whoami == WAI_3DLH)
426 reg |= CTRL2_BOOT_3DLH;
427 else
428 reg |= CTRL2_BOOT_8B;
429 lis3->write(lis3, CTRL_REG2, reg);
430
431 if (lis3->whoami == WAI_3DLH) {
432 lis3->read(lis3, CTRL_REG4, ®);
433 reg |= CTRL4_BDU;
434 lis3->write(lis3, CTRL_REG4, reg);
435 }
436 }
437
438 err = lis3lv02d_get_pwron_wait(lis3);
439 if (err)
440 return err;
441
442 if (lis3->reg_ctrl)
443 lis3_context_restore(lis3);
444
445 return 0;
446}
447EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
448
449
450static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
451{
452 struct lis3lv02d *lis3 = pidev->private;
453 int x, y, z;
454
455 mutex_lock(&lis3->mutex);
456 lis3lv02d_get_xyz(lis3, &x, &y, &z);
457 input_report_abs(pidev->input, ABS_X, x);
458 input_report_abs(pidev->input, ABS_Y, y);
459 input_report_abs(pidev->input, ABS_Z, z);
460 input_sync(pidev->input);
461 mutex_unlock(&lis3->mutex);
462}
463
464static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
465{
466 struct lis3lv02d *lis3 = pidev->private;
467
468 if (lis3->pm_dev)
469 pm_runtime_get_sync(lis3->pm_dev);
470
471 if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev)
472 atomic_set(&lis3->wake_thread, 1);
473
474
475
476
477 lis3lv02d_joystick_poll(pidev);
478}
479
480static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
481{
482 struct lis3lv02d *lis3 = pidev->private;
483
484 atomic_set(&lis3->wake_thread, 0);
485 if (lis3->pm_dev)
486 pm_runtime_put(lis3->pm_dev);
487}
488
489static irqreturn_t lis302dl_interrupt(int irq, void *data)
490{
491 struct lis3lv02d *lis3 = data;
492
493 if (!test_bit(0, &lis3->misc_opened))
494 goto out;
495
496
497
498
499
500
501 atomic_inc(&lis3->count);
502
503 wake_up_interruptible(&lis3->misc_wait);
504 kill_fasync(&lis3->async_queue, SIGIO, POLL_IN);
505out:
506 if (atomic_read(&lis3->wake_thread))
507 return IRQ_WAKE_THREAD;
508 return IRQ_HANDLED;
509}
510
511static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
512{
513 struct input_dev *dev = lis3->idev->input;
514 u8 click_src;
515
516 mutex_lock(&lis3->mutex);
517 lis3->read(lis3, CLICK_SRC, &click_src);
518
519 if (click_src & CLICK_SINGLE_X) {
520 input_report_key(dev, lis3->mapped_btns[0], 1);
521 input_report_key(dev, lis3->mapped_btns[0], 0);
522 }
523
524 if (click_src & CLICK_SINGLE_Y) {
525 input_report_key(dev, lis3->mapped_btns[1], 1);
526 input_report_key(dev, lis3->mapped_btns[1], 0);
527 }
528
529 if (click_src & CLICK_SINGLE_Z) {
530 input_report_key(dev, lis3->mapped_btns[2], 1);
531 input_report_key(dev, lis3->mapped_btns[2], 0);
532 }
533 input_sync(dev);
534 mutex_unlock(&lis3->mutex);
535}
536
537static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
538{
539 int dummy;
540
541
542 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
543 lis3->data_ready_count[index]++;
544}
545
546static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
547{
548 struct lis3lv02d *lis3 = data;
549 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
550
551 if (irq_cfg == LIS3_IRQ1_CLICK)
552 lis302dl_interrupt_handle_click(lis3);
553 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
554 lis302dl_data_ready(lis3, IRQ_LINE0);
555 else
556 lis3lv02d_joystick_poll(lis3->idev);
557
558 return IRQ_HANDLED;
559}
560
561static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
562{
563 struct lis3lv02d *lis3 = data;
564 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
565
566 if (irq_cfg == LIS3_IRQ2_CLICK)
567 lis302dl_interrupt_handle_click(lis3);
568 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
569 lis302dl_data_ready(lis3, IRQ_LINE1);
570 else
571 lis3lv02d_joystick_poll(lis3->idev);
572
573 return IRQ_HANDLED;
574}
575
576static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
577{
578 struct lis3lv02d *lis3 = container_of(file->private_data,
579 struct lis3lv02d, miscdev);
580
581 if (test_and_set_bit(0, &lis3->misc_opened))
582 return -EBUSY;
583
584 if (lis3->pm_dev)
585 pm_runtime_get_sync(lis3->pm_dev);
586
587 atomic_set(&lis3->count, 0);
588 return 0;
589}
590
591static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
592{
593 struct lis3lv02d *lis3 = container_of(file->private_data,
594 struct lis3lv02d, miscdev);
595
596 clear_bit(0, &lis3->misc_opened);
597 if (lis3->pm_dev)
598 pm_runtime_put(lis3->pm_dev);
599 return 0;
600}
601
602static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
603 size_t count, loff_t *pos)
604{
605 struct lis3lv02d *lis3 = container_of(file->private_data,
606 struct lis3lv02d, miscdev);
607
608 DECLARE_WAITQUEUE(wait, current);
609 u32 data;
610 unsigned char byte_data;
611 ssize_t retval = 1;
612
613 if (count < 1)
614 return -EINVAL;
615
616 add_wait_queue(&lis3->misc_wait, &wait);
617 while (true) {
618 set_current_state(TASK_INTERRUPTIBLE);
619 data = atomic_xchg(&lis3->count, 0);
620 if (data)
621 break;
622
623 if (file->f_flags & O_NONBLOCK) {
624 retval = -EAGAIN;
625 goto out;
626 }
627
628 if (signal_pending(current)) {
629 retval = -ERESTARTSYS;
630 goto out;
631 }
632
633 schedule();
634 }
635
636 if (data < 255)
637 byte_data = data;
638 else
639 byte_data = 255;
640
641
642
643 set_current_state(TASK_RUNNING);
644 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
645 retval = -EFAULT;
646
647out:
648 __set_current_state(TASK_RUNNING);
649 remove_wait_queue(&lis3->misc_wait, &wait);
650
651 return retval;
652}
653
654static __poll_t lis3lv02d_misc_poll(struct file *file, poll_table *wait)
655{
656 struct lis3lv02d *lis3 = container_of(file->private_data,
657 struct lis3lv02d, miscdev);
658
659 poll_wait(file, &lis3->misc_wait, wait);
660 if (atomic_read(&lis3->count))
661 return EPOLLIN | EPOLLRDNORM;
662 return 0;
663}
664
665static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
666{
667 struct lis3lv02d *lis3 = container_of(file->private_data,
668 struct lis3lv02d, miscdev);
669
670 return fasync_helper(fd, file, on, &lis3->async_queue);
671}
672
673static const struct file_operations lis3lv02d_misc_fops = {
674 .owner = THIS_MODULE,
675 .llseek = no_llseek,
676 .read = lis3lv02d_misc_read,
677 .open = lis3lv02d_misc_open,
678 .release = lis3lv02d_misc_release,
679 .poll = lis3lv02d_misc_poll,
680 .fasync = lis3lv02d_misc_fasync,
681};
682
683int lis3lv02d_joystick_enable(struct lis3lv02d *lis3)
684{
685 struct input_dev *input_dev;
686 int err;
687 int max_val, fuzz, flat;
688 int btns[] = {BTN_X, BTN_Y, BTN_Z};
689
690 if (lis3->idev)
691 return -EINVAL;
692
693 lis3->idev = input_allocate_polled_device();
694 if (!lis3->idev)
695 return -ENOMEM;
696
697 lis3->idev->poll = lis3lv02d_joystick_poll;
698 lis3->idev->open = lis3lv02d_joystick_open;
699 lis3->idev->close = lis3lv02d_joystick_close;
700 lis3->idev->poll_interval = MDPS_POLL_INTERVAL;
701 lis3->idev->poll_interval_min = MDPS_POLL_MIN;
702 lis3->idev->poll_interval_max = MDPS_POLL_MAX;
703 lis3->idev->private = lis3;
704 input_dev = lis3->idev->input;
705
706 input_dev->name = "ST LIS3LV02DL Accelerometer";
707 input_dev->phys = DRIVER_NAME "/input0";
708 input_dev->id.bustype = BUS_HOST;
709 input_dev->id.vendor = 0;
710 input_dev->dev.parent = &lis3->pdev->dev;
711
712 set_bit(EV_ABS, input_dev->evbit);
713 max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY;
714 if (lis3->whoami == WAI_12B) {
715 fuzz = LIS3_DEFAULT_FUZZ_12B;
716 flat = LIS3_DEFAULT_FLAT_12B;
717 } else {
718 fuzz = LIS3_DEFAULT_FUZZ_8B;
719 flat = LIS3_DEFAULT_FLAT_8B;
720 }
721 fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY;
722 flat = (flat * lis3->scale) / LIS3_ACCURACY;
723
724 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
725 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
726 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
727
728 lis3->mapped_btns[0] = lis3lv02d_get_axis(abs(lis3->ac.x), btns);
729 lis3->mapped_btns[1] = lis3lv02d_get_axis(abs(lis3->ac.y), btns);
730 lis3->mapped_btns[2] = lis3lv02d_get_axis(abs(lis3->ac.z), btns);
731
732 err = input_register_polled_device(lis3->idev);
733 if (err) {
734 input_free_polled_device(lis3->idev);
735 lis3->idev = NULL;
736 }
737
738 return err;
739}
740EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
741
742void lis3lv02d_joystick_disable(struct lis3lv02d *lis3)
743{
744 if (lis3->irq)
745 free_irq(lis3->irq, lis3);
746 if (lis3->pdata && lis3->pdata->irq2)
747 free_irq(lis3->pdata->irq2, lis3);
748
749 if (!lis3->idev)
750 return;
751
752 if (lis3->irq)
753 misc_deregister(&lis3->miscdev);
754 input_unregister_polled_device(lis3->idev);
755 input_free_polled_device(lis3->idev);
756 lis3->idev = NULL;
757}
758EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
759
760
761static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
762{
763
764
765
766
767
768
769
770
771 if (lis3->pm_dev) {
772 pm_runtime_get_sync(lis3->pm_dev);
773 pm_runtime_put_noidle(lis3->pm_dev);
774 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
775 }
776}
777
778static ssize_t lis3lv02d_selftest_show(struct device *dev,
779 struct device_attribute *attr, char *buf)
780{
781 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
782 s16 values[3];
783
784 static const char ok[] = "OK";
785 static const char fail[] = "FAIL";
786 static const char irq[] = "FAIL_IRQ";
787 const char *res;
788
789 lis3lv02d_sysfs_poweron(lis3);
790 switch (lis3lv02d_selftest(lis3, values)) {
791 case SELFTEST_FAIL:
792 res = fail;
793 break;
794 case SELFTEST_IRQ:
795 res = irq;
796 break;
797 case SELFTEST_OK:
798 default:
799 res = ok;
800 break;
801 }
802 return sprintf(buf, "%s %d %d %d\n", res,
803 values[0], values[1], values[2]);
804}
805
806static ssize_t lis3lv02d_position_show(struct device *dev,
807 struct device_attribute *attr, char *buf)
808{
809 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
810 int x, y, z;
811
812 lis3lv02d_sysfs_poweron(lis3);
813 mutex_lock(&lis3->mutex);
814 lis3lv02d_get_xyz(lis3, &x, &y, &z);
815 mutex_unlock(&lis3->mutex);
816 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
817}
818
819static ssize_t lis3lv02d_rate_show(struct device *dev,
820 struct device_attribute *attr, char *buf)
821{
822 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
823
824 lis3lv02d_sysfs_poweron(lis3);
825 return sprintf(buf, "%d\n", lis3lv02d_get_odr(lis3));
826}
827
828static ssize_t lis3lv02d_rate_set(struct device *dev,
829 struct device_attribute *attr, const char *buf,
830 size_t count)
831{
832 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
833 unsigned long rate;
834 int ret;
835
836 ret = kstrtoul(buf, 0, &rate);
837 if (ret)
838 return ret;
839
840 lis3lv02d_sysfs_poweron(lis3);
841 if (lis3lv02d_set_odr(lis3, rate))
842 return -EINVAL;
843
844 return count;
845}
846
847static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
848static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
849static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
850 lis3lv02d_rate_set);
851
852static struct attribute *lis3lv02d_attributes[] = {
853 &dev_attr_selftest.attr,
854 &dev_attr_position.attr,
855 &dev_attr_rate.attr,
856 NULL
857};
858
859static const struct attribute_group lis3lv02d_attribute_group = {
860 .attrs = lis3lv02d_attributes
861};
862
863
864static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
865{
866 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
867 if (IS_ERR(lis3->pdev))
868 return PTR_ERR(lis3->pdev);
869
870 platform_set_drvdata(lis3->pdev, lis3);
871 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
872}
873
874int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
875{
876 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
877 platform_device_unregister(lis3->pdev);
878 if (lis3->pm_dev) {
879
880 pm_runtime_barrier(lis3->pm_dev);
881
882
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 return 0;
891}
892EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
893
894static void lis3lv02d_8b_configure(struct lis3lv02d *lis3,
895 struct lis3lv02d_platform_data *p)
896{
897 int err;
898 int ctrl2 = p->hipass_ctrl;
899
900 if (p->click_flags) {
901 lis3->write(lis3, CLICK_CFG, p->click_flags);
902 lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit);
903 lis3->write(lis3, CLICK_LATENCY, p->click_latency);
904 lis3->write(lis3, CLICK_WINDOW, p->click_window);
905 lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf);
906 lis3->write(lis3, CLICK_THSY_X,
907 (p->click_thresh_x & 0xf) |
908 (p->click_thresh_y << 4));
909
910 if (lis3->idev) {
911 struct input_dev *input_dev = lis3->idev->input;
912 input_set_capability(input_dev, EV_KEY, BTN_X);
913 input_set_capability(input_dev, EV_KEY, BTN_Y);
914 input_set_capability(input_dev, EV_KEY, BTN_Z);
915 }
916 }
917
918 if (p->wakeup_flags) {
919 lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags);
920 lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
921
922 lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1);
923 ctrl2 ^= HP_FF_WU1;
924 }
925
926 if (p->wakeup_flags2) {
927 lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2);
928 lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
929
930 lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1);
931 ctrl2 ^= HP_FF_WU2;
932 }
933
934 lis3->write(lis3, CTRL_REG2, ctrl2);
935
936 if (p->irq2) {
937 err = request_threaded_irq(p->irq2,
938 NULL,
939 lis302dl_interrupt_thread2_8b,
940 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
941 (p->irq_flags2 & IRQF_TRIGGER_MASK),
942 DRIVER_NAME, lis3);
943 if (err < 0)
944 pr_err("No second IRQ. Limited functionality\n");
945 }
946}
947
948#ifdef CONFIG_OF
949int lis3lv02d_init_dt(struct lis3lv02d *lis3)
950{
951 struct lis3lv02d_platform_data *pdata;
952 struct device_node *np = lis3->of_node;
953 u32 val;
954 s32 sval;
955
956 if (!lis3->of_node)
957 return 0;
958
959 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
960 if (!pdata)
961 return -ENOMEM;
962
963 if (of_get_property(np, "st,click-single-x", NULL))
964 pdata->click_flags |= LIS3_CLICK_SINGLE_X;
965 if (of_get_property(np, "st,click-double-x", NULL))
966 pdata->click_flags |= LIS3_CLICK_DOUBLE_X;
967
968 if (of_get_property(np, "st,click-single-y", NULL))
969 pdata->click_flags |= LIS3_CLICK_SINGLE_Y;
970 if (of_get_property(np, "st,click-double-y", NULL))
971 pdata->click_flags |= LIS3_CLICK_DOUBLE_Y;
972
973 if (of_get_property(np, "st,click-single-z", NULL))
974 pdata->click_flags |= LIS3_CLICK_SINGLE_Z;
975 if (of_get_property(np, "st,click-double-z", NULL))
976 pdata->click_flags |= LIS3_CLICK_DOUBLE_Z;
977
978 if (!of_property_read_u32(np, "st,click-threshold-x", &val))
979 pdata->click_thresh_x = val;
980 if (!of_property_read_u32(np, "st,click-threshold-y", &val))
981 pdata->click_thresh_y = val;
982 if (!of_property_read_u32(np, "st,click-threshold-z", &val))
983 pdata->click_thresh_z = val;
984
985 if (!of_property_read_u32(np, "st,click-time-limit", &val))
986 pdata->click_time_limit = val;
987 if (!of_property_read_u32(np, "st,click-latency", &val))
988 pdata->click_latency = val;
989 if (!of_property_read_u32(np, "st,click-window", &val))
990 pdata->click_window = val;
991
992 if (of_get_property(np, "st,irq1-disable", NULL))
993 pdata->irq_cfg |= LIS3_IRQ1_DISABLE;
994 if (of_get_property(np, "st,irq1-ff-wu-1", NULL))
995 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1;
996 if (of_get_property(np, "st,irq1-ff-wu-2", NULL))
997 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2;
998 if (of_get_property(np, "st,irq1-data-ready", NULL))
999 pdata->irq_cfg |= LIS3_IRQ1_DATA_READY;
1000 if (of_get_property(np, "st,irq1-click", NULL))
1001 pdata->irq_cfg |= LIS3_IRQ1_CLICK;
1002
1003 if (of_get_property(np, "st,irq2-disable", NULL))
1004 pdata->irq_cfg |= LIS3_IRQ2_DISABLE;
1005 if (of_get_property(np, "st,irq2-ff-wu-1", NULL))
1006 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1;
1007 if (of_get_property(np, "st,irq2-ff-wu-2", NULL))
1008 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2;
1009 if (of_get_property(np, "st,irq2-data-ready", NULL))
1010 pdata->irq_cfg |= LIS3_IRQ2_DATA_READY;
1011 if (of_get_property(np, "st,irq2-click", NULL))
1012 pdata->irq_cfg |= LIS3_IRQ2_CLICK;
1013
1014 if (of_get_property(np, "st,irq-open-drain", NULL))
1015 pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN;
1016 if (of_get_property(np, "st,irq-active-low", NULL))
1017 pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW;
1018
1019 if (!of_property_read_u32(np, "st,wu-duration-1", &val))
1020 pdata->duration1 = val;
1021 if (!of_property_read_u32(np, "st,wu-duration-2", &val))
1022 pdata->duration2 = val;
1023
1024 if (of_get_property(np, "st,wakeup-x-lo", NULL))
1025 pdata->wakeup_flags |= LIS3_WAKEUP_X_LO;
1026 if (of_get_property(np, "st,wakeup-x-hi", NULL))
1027 pdata->wakeup_flags |= LIS3_WAKEUP_X_HI;
1028 if (of_get_property(np, "st,wakeup-y-lo", NULL))
1029 pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO;
1030 if (of_get_property(np, "st,wakeup-y-hi", NULL))
1031 pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI;
1032 if (of_get_property(np, "st,wakeup-z-lo", NULL))
1033 pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO;
1034 if (of_get_property(np, "st,wakeup-z-hi", NULL))
1035 pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI;
1036 if (of_get_property(np, "st,wakeup-threshold", &val))
1037 pdata->wakeup_thresh = val;
1038
1039 if (of_get_property(np, "st,wakeup2-x-lo", NULL))
1040 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_LO;
1041 if (of_get_property(np, "st,wakeup2-x-hi", NULL))
1042 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_HI;
1043 if (of_get_property(np, "st,wakeup2-y-lo", NULL))
1044 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_LO;
1045 if (of_get_property(np, "st,wakeup2-y-hi", NULL))
1046 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_HI;
1047 if (of_get_property(np, "st,wakeup2-z-lo", NULL))
1048 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_LO;
1049 if (of_get_property(np, "st,wakeup2-z-hi", NULL))
1050 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_HI;
1051 if (of_get_property(np, "st,wakeup2-threshold", &val))
1052 pdata->wakeup_thresh2 = val;
1053
1054 if (!of_property_read_u32(np, "st,highpass-cutoff-hz", &val)) {
1055 switch (val) {
1056 case 1:
1057 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ;
1058 break;
1059 case 2:
1060 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ;
1061 break;
1062 case 4:
1063 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ;
1064 break;
1065 case 8:
1066 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ;
1067 break;
1068 }
1069 }
1070
1071 if (of_get_property(np, "st,hipass1-disable", NULL))
1072 pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE;
1073 if (of_get_property(np, "st,hipass2-disable", NULL))
1074 pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE;
1075
1076 if (of_property_read_s32(np, "st,axis-x", &sval) == 0)
1077 pdata->axis_x = sval;
1078 if (of_property_read_s32(np, "st,axis-y", &sval) == 0)
1079 pdata->axis_y = sval;
1080 if (of_property_read_s32(np, "st,axis-z", &sval) == 0)
1081 pdata->axis_z = sval;
1082
1083 if (of_get_property(np, "st,default-rate", NULL))
1084 pdata->default_rate = val;
1085
1086 if (of_property_read_s32(np, "st,min-limit-x", &sval) == 0)
1087 pdata->st_min_limits[0] = sval;
1088 if (of_property_read_s32(np, "st,min-limit-y", &sval) == 0)
1089 pdata->st_min_limits[1] = sval;
1090 if (of_property_read_s32(np, "st,min-limit-z", &sval) == 0)
1091 pdata->st_min_limits[2] = sval;
1092
1093 if (of_property_read_s32(np, "st,max-limit-x", &sval) == 0)
1094 pdata->st_max_limits[0] = sval;
1095 if (of_property_read_s32(np, "st,max-limit-y", &sval) == 0)
1096 pdata->st_max_limits[1] = sval;
1097 if (of_property_read_s32(np, "st,max-limit-z", &sval) == 0)
1098 pdata->st_max_limits[2] = sval;
1099
1100
1101 lis3->pdata = pdata;
1102
1103 return 0;
1104}
1105
1106#else
1107int lis3lv02d_init_dt(struct lis3lv02d *lis3)
1108{
1109 return 0;
1110}
1111#endif
1112EXPORT_SYMBOL_GPL(lis3lv02d_init_dt);
1113
1114
1115
1116
1117
1118int lis3lv02d_init_device(struct lis3lv02d *lis3)
1119{
1120 int err;
1121 irq_handler_t thread_fn;
1122 int irq_flags = 0;
1123
1124 lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I);
1125
1126 switch (lis3->whoami) {
1127 case WAI_12B:
1128 pr_info("12 bits sensor found\n");
1129 lis3->read_data = lis3lv02d_read_12;
1130 lis3->mdps_max_val = 2048;
1131 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
1132 lis3->odrs = lis3_12_rates;
1133 lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1;
1134 lis3->scale = LIS3_SENSITIVITY_12B;
1135 lis3->regs = lis3_wai12_regs;
1136 lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs);
1137 break;
1138 case WAI_8B:
1139 pr_info("8 bits sensor found\n");
1140 lis3->read_data = lis3lv02d_read_8;
1141 lis3->mdps_max_val = 128;
1142 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1143 lis3->odrs = lis3_8_rates;
1144 lis3->odr_mask = CTRL1_DR;
1145 lis3->scale = LIS3_SENSITIVITY_8B;
1146 lis3->regs = lis3_wai8_regs;
1147 lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs);
1148 break;
1149 case WAI_3DC:
1150 pr_info("8 bits 3DC sensor found\n");
1151 lis3->read_data = lis3lv02d_read_8;
1152 lis3->mdps_max_val = 128;
1153 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1154 lis3->odrs = lis3_3dc_rates;
1155 lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
1156 lis3->scale = LIS3_SENSITIVITY_8B;
1157 break;
1158 case WAI_3DLH:
1159 pr_info("16 bits lis331dlh sensor found\n");
1160 lis3->read_data = lis331dlh_read_data;
1161 lis3->mdps_max_val = 2048;
1162 lis3->shift_adj = SHIFT_ADJ_2G;
1163 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1164 lis3->odrs = lis3_3dlh_rates;
1165 lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1;
1166 lis3->scale = LIS3DLH_SENSITIVITY_2G;
1167 break;
1168 default:
1169 pr_err("unknown sensor type 0x%X\n", lis3->whoami);
1170 return -EINVAL;
1171 }
1172
1173 lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
1174 sizeof(lis3_wai12_regs)), GFP_KERNEL);
1175
1176 if (lis3->reg_cache == NULL) {
1177 printk(KERN_ERR DRIVER_NAME "out of memory\n");
1178 return -ENOMEM;
1179 }
1180
1181 mutex_init(&lis3->mutex);
1182 atomic_set(&lis3->wake_thread, 0);
1183
1184 lis3lv02d_add_fs(lis3);
1185 err = lis3lv02d_poweron(lis3);
1186 if (err) {
1187 lis3lv02d_remove_fs(lis3);
1188 return err;
1189 }
1190
1191 if (lis3->pm_dev) {
1192 pm_runtime_set_active(lis3->pm_dev);
1193 pm_runtime_enable(lis3->pm_dev);
1194 }
1195
1196 if (lis3lv02d_joystick_enable(lis3))
1197 pr_err("joystick initialization failed\n");
1198
1199
1200
1201 if (lis3->pdata) {
1202 struct lis3lv02d_platform_data *p = lis3->pdata;
1203
1204 if (lis3->whoami == WAI_8B)
1205 lis3lv02d_8b_configure(lis3, p);
1206
1207 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
1208
1209 lis3->irq_cfg = p->irq_cfg;
1210 if (p->irq_cfg)
1211 lis3->write(lis3, CTRL_REG3, p->irq_cfg);
1212
1213 if (p->default_rate)
1214 lis3lv02d_set_odr(lis3, p->default_rate);
1215 }
1216
1217
1218 if (!lis3->irq) {
1219 pr_debug("No IRQ. Disabling /dev/freefall\n");
1220 goto out;
1221 }
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234 if (lis3->pdata && lis3->whoami == WAI_8B)
1235 thread_fn = lis302dl_interrupt_thread1_8b;
1236 else
1237 thread_fn = NULL;
1238
1239 err = request_threaded_irq(lis3->irq, lis302dl_interrupt,
1240 thread_fn,
1241 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
1242 irq_flags,
1243 DRIVER_NAME, lis3);
1244
1245 if (err < 0) {
1246 pr_err("Cannot get IRQ\n");
1247 goto out;
1248 }
1249
1250 lis3->miscdev.minor = MISC_DYNAMIC_MINOR;
1251 lis3->miscdev.name = "freefall";
1252 lis3->miscdev.fops = &lis3lv02d_misc_fops;
1253
1254 if (misc_register(&lis3->miscdev))
1255 pr_err("misc_register failed\n");
1256out:
1257 return 0;
1258}
1259EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
1260
1261MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1262MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1263MODULE_LICENSE("GPL");
1264
