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22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/kernel.h>
26#include <linux/dmi.h>
27#include <linux/module.h>
28#include <linux/types.h>
29#include <linux/platform_device.h>
30#include <linux/interrupt.h>
31#include <linux/input-polldev.h>
32#include <linux/delay.h>
33#include <linux/wait.h>
34#include <linux/poll.h>
35#include <linux/slab.h>
36#include <linux/freezer.h>
37#include <linux/uaccess.h>
38#include <linux/miscdevice.h>
39#include <linux/pm_runtime.h>
40#include <linux/atomic.h>
41#include <linux/of_device.h>
42#include "lis3lv02d.h"
43
44#define DRIVER_NAME "lis3lv02d"
45
46
47#define MDPS_POLL_INTERVAL 50
48#define MDPS_POLL_MIN 0
49#define MDPS_POLL_MAX 2000
50
51#define LIS3_SYSFS_POWERDOWN_DELAY 5000
52
53#define SELFTEST_OK 0
54#define SELFTEST_FAIL -1
55#define SELFTEST_IRQ -2
56
57#define IRQ_LINE0 0
58#define IRQ_LINE1 1
59
60
61
62
63
64
65
66
67
68
69#define LIS3_PWRON_DELAY_WAI_12B (5000)
70#define LIS3_PWRON_DELAY_WAI_8B (3000)
71
72
73
74
75
76
77
78#define LIS3_ACCURACY 1024
79
80#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
81#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
82
83
84
85
86
87
88
89#define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
90#define SHIFT_ADJ_2G 4
91
92#define LIS3_DEFAULT_FUZZ_12B 3
93#define LIS3_DEFAULT_FLAT_12B 3
94#define LIS3_DEFAULT_FUZZ_8B 1
95#define LIS3_DEFAULT_FLAT_8B 1
96
97struct lis3lv02d lis3_dev = {
98 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
99};
100EXPORT_SYMBOL_GPL(lis3_dev);
101
102
103
104
105static int param_set_axis(const char *val, const struct kernel_param *kp)
106{
107 int ret = param_set_int(val, kp);
108 if (!ret) {
109 int val = *(int *)kp->arg;
110 if (val < 0)
111 val = -val;
112 if (!val || val > 3)
113 return -EINVAL;
114 }
115 return ret;
116}
117
118static const struct kernel_param_ops param_ops_axis = {
119 .set = param_set_axis,
120 .get = param_get_int,
121};
122
123#define param_check_axis(name, p) param_check_int(name, p)
124
125module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
126MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
127
128static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
129{
130 s8 lo;
131 if (lis3->read(lis3, reg, &lo) < 0)
132 return 0;
133
134 return lo;
135}
136
137static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
138{
139 u8 lo, hi;
140
141 lis3->read(lis3, reg - 1, &lo);
142 lis3->read(lis3, reg, &hi);
143
144 return (s16)((hi << 8) | lo);
145}
146
147
148static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg)
149{
150 u8 lo, hi;
151 int v;
152
153 lis3->read(lis3, reg - 1, &lo);
154 lis3->read(lis3, reg, &hi);
155 v = (int) ((hi << 8) | lo);
156
157 return (s16) v >> lis3->shift_adj;
158}
159
160
161
162
163
164
165
166
167static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
168{
169 if (axis > 0)
170 return hw_values[axis - 1];
171 else
172 return -hw_values[-axis - 1];
173}
174
175
176
177
178
179
180
181
182
183
184static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
185{
186 int position[3];
187 int i;
188
189 if (lis3->blkread) {
190 if (lis3->whoami == WAI_12B) {
191 u16 data[3];
192 lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
193 for (i = 0; i < 3; i++)
194 position[i] = (s16)le16_to_cpu(data[i]);
195 } else {
196 u8 data[5];
197
198 lis3->blkread(lis3, OUTX, 5, data);
199 for (i = 0; i < 3; i++)
200 position[i] = (s8)data[i * 2];
201 }
202 } else {
203 position[0] = lis3->read_data(lis3, OUTX);
204 position[1] = lis3->read_data(lis3, OUTY);
205 position[2] = lis3->read_data(lis3, OUTZ);
206 }
207
208 for (i = 0; i < 3; i++)
209 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
210
211 *x = lis3lv02d_get_axis(lis3->ac.x, position);
212 *y = lis3lv02d_get_axis(lis3->ac.y, position);
213 *z = lis3lv02d_get_axis(lis3->ac.z, position);
214}
215
216
217static int lis3_12_rates[4] = {40, 160, 640, 2560};
218static int lis3_8_rates[2] = {100, 400};
219static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
220static int lis3_3dlh_rates[4] = {50, 100, 400, 1000};
221
222
223static int lis3lv02d_get_odr(struct lis3lv02d *lis3)
224{
225 u8 ctrl;
226 int shift;
227
228 lis3->read(lis3, CTRL_REG1, &ctrl);
229 ctrl &= lis3->odr_mask;
230 shift = ffs(lis3->odr_mask) - 1;
231 return lis3->odrs[(ctrl >> shift)];
232}
233
234static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3)
235{
236 int div = lis3lv02d_get_odr(lis3);
237
238 if (WARN_ONCE(div == 0, "device returned spurious data"))
239 return -ENXIO;
240
241
242 msleep(lis3->pwron_delay / div);
243 return 0;
244}
245
246static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate)
247{
248 u8 ctrl;
249 int i, len, shift;
250
251 if (!rate)
252 return -EINVAL;
253
254 lis3->read(lis3, CTRL_REG1, &ctrl);
255 ctrl &= ~lis3->odr_mask;
256 len = 1 << hweight_long(lis3->odr_mask);
257 shift = ffs(lis3->odr_mask) - 1;
258
259 for (i = 0; i < len; i++)
260 if (lis3->odrs[i] == rate) {
261 lis3->write(lis3, CTRL_REG1,
262 ctrl | (i << shift));
263 return 0;
264 }
265 return -EINVAL;
266}
267
268static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
269{
270 u8 ctlreg, reg;
271 s16 x, y, z;
272 u8 selftest;
273 int ret;
274 u8 ctrl_reg_data;
275 unsigned char irq_cfg;
276
277 mutex_lock(&lis3->mutex);
278
279 irq_cfg = lis3->irq_cfg;
280 if (lis3->whoami == WAI_8B) {
281 lis3->data_ready_count[IRQ_LINE0] = 0;
282 lis3->data_ready_count[IRQ_LINE1] = 0;
283
284
285 atomic_inc(&lis3->wake_thread);
286 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
287 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
288 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
289 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
290 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
291 }
292
293 if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) {
294 ctlreg = CTRL_REG4;
295 selftest = CTRL4_ST0;
296 } else {
297 ctlreg = CTRL_REG1;
298 if (lis3->whoami == WAI_12B)
299 selftest = CTRL1_ST;
300 else
301 selftest = CTRL1_STP;
302 }
303
304 lis3->read(lis3, ctlreg, ®);
305 lis3->write(lis3, ctlreg, (reg | selftest));
306 ret = lis3lv02d_get_pwron_wait(lis3);
307 if (ret)
308 goto fail;
309
310
311 x = lis3->read_data(lis3, OUTX);
312 y = lis3->read_data(lis3, OUTY);
313 z = lis3->read_data(lis3, OUTZ);
314
315
316 lis3->write(lis3, ctlreg, reg);
317 ret = lis3lv02d_get_pwron_wait(lis3);
318 if (ret)
319 goto fail;
320
321 results[0] = x - lis3->read_data(lis3, OUTX);
322 results[1] = y - lis3->read_data(lis3, OUTY);
323 results[2] = z - lis3->read_data(lis3, OUTZ);
324
325 ret = 0;
326
327 if (lis3->whoami == WAI_8B) {
328
329 atomic_dec(&lis3->wake_thread);
330 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
331 lis3->irq_cfg = irq_cfg;
332
333 if ((irq_cfg & LIS3_IRQ1_MASK) &&
334 lis3->data_ready_count[IRQ_LINE0] < 2) {
335 ret = SELFTEST_IRQ;
336 goto fail;
337 }
338
339 if ((irq_cfg & LIS3_IRQ2_MASK) &&
340 lis3->data_ready_count[IRQ_LINE1] < 2) {
341 ret = SELFTEST_IRQ;
342 goto fail;
343 }
344 }
345
346 if (lis3->pdata) {
347 int i;
348 for (i = 0; i < 3; i++) {
349
350 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
351 (results[i] > lis3->pdata->st_max_limits[i])) {
352 ret = SELFTEST_FAIL;
353 goto fail;
354 }
355 }
356 }
357
358
359fail:
360 mutex_unlock(&lis3->mutex);
361 return ret;
362}
363
364
365
366
367
368
369static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
370 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
371 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
372 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
373 CTRL_REG1, CTRL_REG2, CTRL_REG3};
374
375static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
376 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
377 DD_THSE_L, DD_THSE_H,
378 CTRL_REG1, CTRL_REG3, CTRL_REG2};
379
380static inline void lis3_context_save(struct lis3lv02d *lis3)
381{
382 int i;
383 for (i = 0; i < lis3->regs_size; i++)
384 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
385 lis3->regs_stored = true;
386}
387
388static inline void lis3_context_restore(struct lis3lv02d *lis3)
389{
390 int i;
391 if (lis3->regs_stored)
392 for (i = 0; i < lis3->regs_size; i++)
393 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
394}
395
396void lis3lv02d_poweroff(struct lis3lv02d *lis3)
397{
398 if (lis3->reg_ctrl)
399 lis3_context_save(lis3);
400
401 lis3->write(lis3, CTRL_REG1, 0x00);
402 if (lis3->reg_ctrl)
403 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
404}
405EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
406
407int lis3lv02d_poweron(struct lis3lv02d *lis3)
408{
409 int err;
410 u8 reg;
411
412 lis3->init(lis3);
413
414
415
416
417
418
419
420 if (lis3->pdata) {
421 lis3->read(lis3, CTRL_REG2, ®);
422 if (lis3->whoami == WAI_12B)
423 reg |= CTRL2_BDU | CTRL2_BOOT;
424 else if (lis3->whoami == WAI_3DLH)
425 reg |= CTRL2_BOOT_3DLH;
426 else
427 reg |= CTRL2_BOOT_8B;
428 lis3->write(lis3, CTRL_REG2, reg);
429
430 if (lis3->whoami == WAI_3DLH) {
431 lis3->read(lis3, CTRL_REG4, ®);
432 reg |= CTRL4_BDU;
433 lis3->write(lis3, CTRL_REG4, reg);
434 }
435 }
436
437 err = lis3lv02d_get_pwron_wait(lis3);
438 if (err)
439 return err;
440
441 if (lis3->reg_ctrl)
442 lis3_context_restore(lis3);
443
444 return 0;
445}
446EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
447
448
449static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
450{
451 struct lis3lv02d *lis3 = pidev->private;
452 int x, y, z;
453
454 mutex_lock(&lis3->mutex);
455 lis3lv02d_get_xyz(lis3, &x, &y, &z);
456 input_report_abs(pidev->input, ABS_X, x);
457 input_report_abs(pidev->input, ABS_Y, y);
458 input_report_abs(pidev->input, ABS_Z, z);
459 input_sync(pidev->input);
460 mutex_unlock(&lis3->mutex);
461}
462
463static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
464{
465 struct lis3lv02d *lis3 = pidev->private;
466
467 if (lis3->pm_dev)
468 pm_runtime_get_sync(lis3->pm_dev);
469
470 if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev)
471 atomic_set(&lis3->wake_thread, 1);
472
473
474
475
476 lis3lv02d_joystick_poll(pidev);
477}
478
479static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
480{
481 struct lis3lv02d *lis3 = pidev->private;
482
483 atomic_set(&lis3->wake_thread, 0);
484 if (lis3->pm_dev)
485 pm_runtime_put(lis3->pm_dev);
486}
487
488static irqreturn_t lis302dl_interrupt(int irq, void *data)
489{
490 struct lis3lv02d *lis3 = data;
491
492 if (!test_bit(0, &lis3->misc_opened))
493 goto out;
494
495
496
497
498
499
500 atomic_inc(&lis3->count);
501
502 wake_up_interruptible(&lis3->misc_wait);
503 kill_fasync(&lis3->async_queue, SIGIO, POLL_IN);
504out:
505 if (atomic_read(&lis3->wake_thread))
506 return IRQ_WAKE_THREAD;
507 return IRQ_HANDLED;
508}
509
510static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
511{
512 struct input_dev *dev = lis3->idev->input;
513 u8 click_src;
514
515 mutex_lock(&lis3->mutex);
516 lis3->read(lis3, CLICK_SRC, &click_src);
517
518 if (click_src & CLICK_SINGLE_X) {
519 input_report_key(dev, lis3->mapped_btns[0], 1);
520 input_report_key(dev, lis3->mapped_btns[0], 0);
521 }
522
523 if (click_src & CLICK_SINGLE_Y) {
524 input_report_key(dev, lis3->mapped_btns[1], 1);
525 input_report_key(dev, lis3->mapped_btns[1], 0);
526 }
527
528 if (click_src & CLICK_SINGLE_Z) {
529 input_report_key(dev, lis3->mapped_btns[2], 1);
530 input_report_key(dev, lis3->mapped_btns[2], 0);
531 }
532 input_sync(dev);
533 mutex_unlock(&lis3->mutex);
534}
535
536static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
537{
538 int dummy;
539
540
541 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
542 lis3->data_ready_count[index]++;
543}
544
545static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
546{
547 struct lis3lv02d *lis3 = data;
548 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
549
550 if (irq_cfg == LIS3_IRQ1_CLICK)
551 lis302dl_interrupt_handle_click(lis3);
552 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
553 lis302dl_data_ready(lis3, IRQ_LINE0);
554 else
555 lis3lv02d_joystick_poll(lis3->idev);
556
557 return IRQ_HANDLED;
558}
559
560static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
561{
562 struct lis3lv02d *lis3 = data;
563 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
564
565 if (irq_cfg == LIS3_IRQ2_CLICK)
566 lis302dl_interrupt_handle_click(lis3);
567 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
568 lis302dl_data_ready(lis3, IRQ_LINE1);
569 else
570 lis3lv02d_joystick_poll(lis3->idev);
571
572 return IRQ_HANDLED;
573}
574
575static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
576{
577 struct lis3lv02d *lis3 = container_of(file->private_data,
578 struct lis3lv02d, miscdev);
579
580 if (test_and_set_bit(0, &lis3->misc_opened))
581 return -EBUSY;
582
583 if (lis3->pm_dev)
584 pm_runtime_get_sync(lis3->pm_dev);
585
586 atomic_set(&lis3->count, 0);
587 return 0;
588}
589
590static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
591{
592 struct lis3lv02d *lis3 = container_of(file->private_data,
593 struct lis3lv02d, miscdev);
594
595 clear_bit(0, &lis3->misc_opened);
596 if (lis3->pm_dev)
597 pm_runtime_put(lis3->pm_dev);
598 return 0;
599}
600
601static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
602 size_t count, loff_t *pos)
603{
604 struct lis3lv02d *lis3 = container_of(file->private_data,
605 struct lis3lv02d, miscdev);
606
607 DECLARE_WAITQUEUE(wait, current);
608 u32 data;
609 unsigned char byte_data;
610 ssize_t retval = 1;
611
612 if (count < 1)
613 return -EINVAL;
614
615 add_wait_queue(&lis3->misc_wait, &wait);
616 while (true) {
617 set_current_state(TASK_INTERRUPTIBLE);
618 data = atomic_xchg(&lis3->count, 0);
619 if (data)
620 break;
621
622 if (file->f_flags & O_NONBLOCK) {
623 retval = -EAGAIN;
624 goto out;
625 }
626
627 if (signal_pending(current)) {
628 retval = -ERESTARTSYS;
629 goto out;
630 }
631
632 schedule();
633 }
634
635 if (data < 255)
636 byte_data = data;
637 else
638 byte_data = 255;
639
640
641
642 set_current_state(TASK_RUNNING);
643 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
644 retval = -EFAULT;
645
646out:
647 __set_current_state(TASK_RUNNING);
648 remove_wait_queue(&lis3->misc_wait, &wait);
649
650 return retval;
651}
652
653static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
654{
655 struct lis3lv02d *lis3 = container_of(file->private_data,
656 struct lis3lv02d, miscdev);
657
658 poll_wait(file, &lis3->misc_wait, wait);
659 if (atomic_read(&lis3->count))
660 return POLLIN | POLLRDNORM;
661 return 0;
662}
663
664static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
665{
666 struct lis3lv02d *lis3 = container_of(file->private_data,
667 struct lis3lv02d, miscdev);
668
669 return fasync_helper(fd, file, on, &lis3->async_queue);
670}
671
672static const struct file_operations lis3lv02d_misc_fops = {
673 .owner = THIS_MODULE,
674 .llseek = no_llseek,
675 .read = lis3lv02d_misc_read,
676 .open = lis3lv02d_misc_open,
677 .release = lis3lv02d_misc_release,
678 .poll = lis3lv02d_misc_poll,
679 .fasync = lis3lv02d_misc_fasync,
680};
681
682int lis3lv02d_joystick_enable(struct lis3lv02d *lis3)
683{
684 struct input_dev *input_dev;
685 int err;
686 int max_val, fuzz, flat;
687 int btns[] = {BTN_X, BTN_Y, BTN_Z};
688
689 if (lis3->idev)
690 return -EINVAL;
691
692 lis3->idev = input_allocate_polled_device();
693 if (!lis3->idev)
694 return -ENOMEM;
695
696 lis3->idev->poll = lis3lv02d_joystick_poll;
697 lis3->idev->open = lis3lv02d_joystick_open;
698 lis3->idev->close = lis3lv02d_joystick_close;
699 lis3->idev->poll_interval = MDPS_POLL_INTERVAL;
700 lis3->idev->poll_interval_min = MDPS_POLL_MIN;
701 lis3->idev->poll_interval_max = MDPS_POLL_MAX;
702 lis3->idev->private = lis3;
703 input_dev = lis3->idev->input;
704
705 input_dev->name = "ST LIS3LV02DL Accelerometer";
706 input_dev->phys = DRIVER_NAME "/input0";
707 input_dev->id.bustype = BUS_HOST;
708 input_dev->id.vendor = 0;
709 input_dev->dev.parent = &lis3->pdev->dev;
710
711 set_bit(EV_ABS, input_dev->evbit);
712 max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY;
713 if (lis3->whoami == WAI_12B) {
714 fuzz = LIS3_DEFAULT_FUZZ_12B;
715 flat = LIS3_DEFAULT_FLAT_12B;
716 } else {
717 fuzz = LIS3_DEFAULT_FUZZ_8B;
718 flat = LIS3_DEFAULT_FLAT_8B;
719 }
720 fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY;
721 flat = (flat * lis3->scale) / LIS3_ACCURACY;
722
723 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
724 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
725 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
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_polled_device(lis3->idev);
732 if (err) {
733 input_free_polled_device(lis3->idev);
734 lis3->idev = NULL;
735 }
736
737 return err;
738}
739EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
740
741void lis3lv02d_joystick_disable(struct lis3lv02d *lis3)
742{
743 if (lis3->irq)
744 free_irq(lis3->irq, lis3);
745 if (lis3->pdata && lis3->pdata->irq2)
746 free_irq(lis3->pdata->irq2, lis3);
747
748 if (!lis3->idev)
749 return;
750
751 if (lis3->irq)
752 misc_deregister(&lis3->miscdev);
753 input_unregister_polled_device(lis3->idev);
754 input_free_polled_device(lis3->idev);
755 lis3->idev = NULL;
756}
757EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
758
759
760static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
761{
762
763
764
765
766
767
768
769
770 if (lis3->pm_dev) {
771 pm_runtime_get_sync(lis3->pm_dev);
772 pm_runtime_put_noidle(lis3->pm_dev);
773 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
774 }
775}
776
777static ssize_t lis3lv02d_selftest_show(struct device *dev,
778 struct device_attribute *attr, char *buf)
779{
780 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
781 s16 values[3];
782
783 static const char ok[] = "OK";
784 static const char fail[] = "FAIL";
785 static const char irq[] = "FAIL_IRQ";
786 const char *res;
787
788 lis3lv02d_sysfs_poweron(lis3);
789 switch (lis3lv02d_selftest(lis3, values)) {
790 case SELFTEST_FAIL:
791 res = fail;
792 break;
793 case SELFTEST_IRQ:
794 res = irq;
795 break;
796 case SELFTEST_OK:
797 default:
798 res = ok;
799 break;
800 }
801 return sprintf(buf, "%s %d %d %d\n", res,
802 values[0], values[1], values[2]);
803}
804
805static ssize_t lis3lv02d_position_show(struct device *dev,
806 struct device_attribute *attr, char *buf)
807{
808 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
809 int x, y, z;
810
811 lis3lv02d_sysfs_poweron(lis3);
812 mutex_lock(&lis3->mutex);
813 lis3lv02d_get_xyz(lis3, &x, &y, &z);
814 mutex_unlock(&lis3->mutex);
815 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
816}
817
818static ssize_t lis3lv02d_rate_show(struct device *dev,
819 struct device_attribute *attr, char *buf)
820{
821 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
822
823 lis3lv02d_sysfs_poweron(lis3);
824 return sprintf(buf, "%d\n", lis3lv02d_get_odr(lis3));
825}
826
827static ssize_t lis3lv02d_rate_set(struct device *dev,
828 struct device_attribute *attr, const char *buf,
829 size_t count)
830{
831 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
832 unsigned long rate;
833 int ret;
834
835 ret = kstrtoul(buf, 0, &rate);
836 if (ret)
837 return ret;
838
839 lis3lv02d_sysfs_poweron(lis3);
840 if (lis3lv02d_set_odr(lis3, rate))
841 return -EINVAL;
842
843 return count;
844}
845
846static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
847static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
848static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
849 lis3lv02d_rate_set);
850
851static struct attribute *lis3lv02d_attributes[] = {
852 &dev_attr_selftest.attr,
853 &dev_attr_position.attr,
854 &dev_attr_rate.attr,
855 NULL
856};
857
858static struct attribute_group lis3lv02d_attribute_group = {
859 .attrs = lis3lv02d_attributes
860};
861
862
863static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
864{
865 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
866 if (IS_ERR(lis3->pdev))
867 return PTR_ERR(lis3->pdev);
868
869 platform_set_drvdata(lis3->pdev, lis3);
870 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
871}
872
873int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
874{
875 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
876 platform_device_unregister(lis3->pdev);
877 if (lis3->pm_dev) {
878
879 pm_runtime_barrier(lis3->pm_dev);
880
881
882 if (!pm_runtime_suspended(lis3->pm_dev))
883 lis3lv02d_poweroff(lis3);
884
885 pm_runtime_disable(lis3->pm_dev);
886 pm_runtime_set_suspended(lis3->pm_dev);
887 }
888 kfree(lis3->reg_cache);
889 return 0;
890}
891EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
892
893static 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 struct input_dev *input_dev = lis3->idev->input;
911 input_set_capability(input_dev, EV_KEY, BTN_X);
912 input_set_capability(input_dev, EV_KEY, BTN_Y);
913 input_set_capability(input_dev, EV_KEY, BTN_Z);
914 }
915 }
916
917 if (p->wakeup_flags) {
918 lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags);
919 lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
920
921 lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1);
922 ctrl2 ^= HP_FF_WU1;
923 }
924
925 if (p->wakeup_flags2) {
926 lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2);
927 lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
928
929 lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1);
930 ctrl2 ^= HP_FF_WU2;
931 }
932
933 lis3->write(lis3, CTRL_REG2, ctrl2);
934
935 if (p->irq2) {
936 err = request_threaded_irq(p->irq2,
937 NULL,
938 lis302dl_interrupt_thread2_8b,
939 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
940 (p->irq_flags2 & IRQF_TRIGGER_MASK),
941 DRIVER_NAME, lis3);
942 if (err < 0)
943 pr_err("No second IRQ. Limited functionality\n");
944 }
945}
946
947#ifdef CONFIG_OF
948int lis3lv02d_init_dt(struct lis3lv02d *lis3)
949{
950 struct lis3lv02d_platform_data *pdata;
951 struct device_node *np = lis3->of_node;
952 u32 val;
953 s32 sval;
954
955 if (!lis3->of_node)
956 return 0;
957
958 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
959 if (!pdata)
960 return -ENOMEM;
961
962 if (of_get_property(np, "st,click-single-x", NULL))
963 pdata->click_flags |= LIS3_CLICK_SINGLE_X;
964 if (of_get_property(np, "st,click-double-x", NULL))
965 pdata->click_flags |= LIS3_CLICK_DOUBLE_X;
966
967 if (of_get_property(np, "st,click-single-y", NULL))
968 pdata->click_flags |= LIS3_CLICK_SINGLE_Y;
969 if (of_get_property(np, "st,click-double-y", NULL))
970 pdata->click_flags |= LIS3_CLICK_DOUBLE_Y;
971
972 if (of_get_property(np, "st,click-single-z", NULL))
973 pdata->click_flags |= LIS3_CLICK_SINGLE_Z;
974 if (of_get_property(np, "st,click-double-z", NULL))
975 pdata->click_flags |= LIS3_CLICK_DOUBLE_Z;
976
977 if (!of_property_read_u32(np, "st,click-threshold-x", &val))
978 pdata->click_thresh_x = val;
979 if (!of_property_read_u32(np, "st,click-threshold-y", &val))
980 pdata->click_thresh_y = val;
981 if (!of_property_read_u32(np, "st,click-threshold-z", &val))
982 pdata->click_thresh_z = val;
983
984 if (!of_property_read_u32(np, "st,click-time-limit", &val))
985 pdata->click_time_limit = val;
986 if (!of_property_read_u32(np, "st,click-latency", &val))
987 pdata->click_latency = val;
988 if (!of_property_read_u32(np, "st,click-window", &val))
989 pdata->click_window = val;
990
991 if (of_get_property(np, "st,irq1-disable", NULL))
992 pdata->irq_cfg |= LIS3_IRQ1_DISABLE;
993 if (of_get_property(np, "st,irq1-ff-wu-1", NULL))
994 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1;
995 if (of_get_property(np, "st,irq1-ff-wu-2", NULL))
996 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2;
997 if (of_get_property(np, "st,irq1-data-ready", NULL))
998 pdata->irq_cfg |= LIS3_IRQ1_DATA_READY;
999 if (of_get_property(np, "st,irq1-click", NULL))
1000 pdata->irq_cfg |= LIS3_IRQ1_CLICK;
1001
1002 if (of_get_property(np, "st,irq2-disable", NULL))
1003 pdata->irq_cfg |= LIS3_IRQ2_DISABLE;
1004 if (of_get_property(np, "st,irq2-ff-wu-1", NULL))
1005 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1;
1006 if (of_get_property(np, "st,irq2-ff-wu-2", NULL))
1007 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2;
1008 if (of_get_property(np, "st,irq2-data-ready", NULL))
1009 pdata->irq_cfg |= LIS3_IRQ2_DATA_READY;
1010 if (of_get_property(np, "st,irq2-click", NULL))
1011 pdata->irq_cfg |= LIS3_IRQ2_CLICK;
1012
1013 if (of_get_property(np, "st,irq-open-drain", NULL))
1014 pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN;
1015 if (of_get_property(np, "st,irq-active-low", NULL))
1016 pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW;
1017
1018 if (!of_property_read_u32(np, "st,wu-duration-1", &val))
1019 pdata->duration1 = val;
1020 if (!of_property_read_u32(np, "st,wu-duration-2", &val))
1021 pdata->duration2 = val;
1022
1023 if (of_get_property(np, "st,wakeup-x-lo", NULL))
1024 pdata->wakeup_flags |= LIS3_WAKEUP_X_LO;
1025 if (of_get_property(np, "st,wakeup-x-hi", NULL))
1026 pdata->wakeup_flags |= LIS3_WAKEUP_X_HI;
1027 if (of_get_property(np, "st,wakeup-y-lo", NULL))
1028 pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO;
1029 if (of_get_property(np, "st,wakeup-y-hi", NULL))
1030 pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI;
1031 if (of_get_property(np, "st,wakeup-z-lo", NULL))
1032 pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO;
1033 if (of_get_property(np, "st,wakeup-z-hi", NULL))
1034 pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI;
1035 if (of_get_property(np, "st,wakeup-threshold", &val))
1036 pdata->wakeup_thresh = val;
1037
1038 if (of_get_property(np, "st,wakeup2-x-lo", NULL))
1039 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_LO;
1040 if (of_get_property(np, "st,wakeup2-x-hi", NULL))
1041 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_HI;
1042 if (of_get_property(np, "st,wakeup2-y-lo", NULL))
1043 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_LO;
1044 if (of_get_property(np, "st,wakeup2-y-hi", NULL))
1045 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_HI;
1046 if (of_get_property(np, "st,wakeup2-z-lo", NULL))
1047 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_LO;
1048 if (of_get_property(np, "st,wakeup2-z-hi", NULL))
1049 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_HI;
1050 if (of_get_property(np, "st,wakeup2-threshold", &val))
1051 pdata->wakeup_thresh2 = val;
1052
1053 if (!of_property_read_u32(np, "st,highpass-cutoff-hz", &val)) {
1054 switch (val) {
1055 case 1:
1056 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ;
1057 break;
1058 case 2:
1059 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ;
1060 break;
1061 case 4:
1062 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ;
1063 break;
1064 case 8:
1065 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ;
1066 break;
1067 }
1068 }
1069
1070 if (of_get_property(np, "st,hipass1-disable", NULL))
1071 pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE;
1072 if (of_get_property(np, "st,hipass2-disable", NULL))
1073 pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE;
1074
1075 if (of_property_read_s32(np, "st,axis-x", &sval) == 0)
1076 pdata->axis_x = sval;
1077 if (of_property_read_s32(np, "st,axis-y", &sval) == 0)
1078 pdata->axis_y = sval;
1079 if (of_property_read_s32(np, "st,axis-z", &sval) == 0)
1080 pdata->axis_z = sval;
1081
1082 if (of_get_property(np, "st,default-rate", NULL))
1083 pdata->default_rate = val;
1084
1085 if (of_property_read_s32(np, "st,min-limit-x", &sval) == 0)
1086 pdata->st_min_limits[0] = sval;
1087 if (of_property_read_s32(np, "st,min-limit-y", &sval) == 0)
1088 pdata->st_min_limits[1] = sval;
1089 if (of_property_read_s32(np, "st,min-limit-z", &sval) == 0)
1090 pdata->st_min_limits[2] = sval;
1091
1092 if (of_property_read_s32(np, "st,max-limit-x", &sval) == 0)
1093 pdata->st_max_limits[0] = sval;
1094 if (of_property_read_s32(np, "st,max-limit-y", &sval) == 0)
1095 pdata->st_max_limits[1] = sval;
1096 if (of_property_read_s32(np, "st,max-limit-z", &sval) == 0)
1097 pdata->st_max_limits[2] = sval;
1098
1099
1100 lis3->pdata = pdata;
1101
1102 return 0;
1103}
1104
1105#else
1106int lis3lv02d_init_dt(struct lis3lv02d *lis3)
1107{
1108 return 0;
1109}
1110#endif
1111EXPORT_SYMBOL_GPL(lis3lv02d_init_dt);
1112
1113
1114
1115
1116
1117int lis3lv02d_init_device(struct lis3lv02d *lis3)
1118{
1119 int err;
1120 irq_handler_t thread_fn;
1121 int irq_flags = 0;
1122
1123 lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I);
1124
1125 switch (lis3->whoami) {
1126 case WAI_12B:
1127 pr_info("12 bits sensor found\n");
1128 lis3->read_data = lis3lv02d_read_12;
1129 lis3->mdps_max_val = 2048;
1130 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
1131 lis3->odrs = lis3_12_rates;
1132 lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1;
1133 lis3->scale = LIS3_SENSITIVITY_12B;
1134 lis3->regs = lis3_wai12_regs;
1135 lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs);
1136 break;
1137 case WAI_8B:
1138 pr_info("8 bits sensor found\n");
1139 lis3->read_data = lis3lv02d_read_8;
1140 lis3->mdps_max_val = 128;
1141 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1142 lis3->odrs = lis3_8_rates;
1143 lis3->odr_mask = CTRL1_DR;
1144 lis3->scale = LIS3_SENSITIVITY_8B;
1145 lis3->regs = lis3_wai8_regs;
1146 lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs);
1147 break;
1148 case WAI_3DC:
1149 pr_info("8 bits 3DC sensor found\n");
1150 lis3->read_data = lis3lv02d_read_8;
1151 lis3->mdps_max_val = 128;
1152 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1153 lis3->odrs = lis3_3dc_rates;
1154 lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
1155 lis3->scale = LIS3_SENSITIVITY_8B;
1156 break;
1157 case WAI_3DLH:
1158 pr_info("16 bits lis331dlh sensor found\n");
1159 lis3->read_data = lis331dlh_read_data;
1160 lis3->mdps_max_val = 2048;
1161 lis3->shift_adj = SHIFT_ADJ_2G;
1162 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1163 lis3->odrs = lis3_3dlh_rates;
1164 lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1;
1165 lis3->scale = LIS3DLH_SENSITIVITY_2G;
1166 break;
1167 default:
1168 pr_err("unknown sensor type 0x%X\n", lis3->whoami);
1169 return -EINVAL;
1170 }
1171
1172 lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
1173 sizeof(lis3_wai12_regs)), GFP_KERNEL);
1174
1175 if (lis3->reg_cache == NULL) {
1176 printk(KERN_ERR DRIVER_NAME "out of memory\n");
1177 return -ENOMEM;
1178 }
1179
1180 mutex_init(&lis3->mutex);
1181 atomic_set(&lis3->wake_thread, 0);
1182
1183 lis3lv02d_add_fs(lis3);
1184 err = lis3lv02d_poweron(lis3);
1185 if (err) {
1186 lis3lv02d_remove_fs(lis3);
1187 return err;
1188 }
1189
1190 if (lis3->pm_dev) {
1191 pm_runtime_set_active(lis3->pm_dev);
1192 pm_runtime_enable(lis3->pm_dev);
1193 }
1194
1195 if (lis3lv02d_joystick_enable(lis3))
1196 pr_err("joystick initialization failed\n");
1197
1198
1199
1200 if (lis3->pdata) {
1201 struct lis3lv02d_platform_data *p = lis3->pdata;
1202
1203 if (lis3->whoami == WAI_8B)
1204 lis3lv02d_8b_configure(lis3, p);
1205
1206 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
1207
1208 lis3->irq_cfg = p->irq_cfg;
1209 if (p->irq_cfg)
1210 lis3->write(lis3, CTRL_REG3, p->irq_cfg);
1211
1212 if (p->default_rate)
1213 lis3lv02d_set_odr(lis3, p->default_rate);
1214 }
1215
1216
1217 if (!lis3->irq) {
1218 pr_debug("No IRQ. Disabling /dev/freefall\n");
1219 goto out;
1220 }
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233 if (lis3->pdata && lis3->whoami == WAI_8B)
1234 thread_fn = lis302dl_interrupt_thread1_8b;
1235 else
1236 thread_fn = NULL;
1237
1238 err = request_threaded_irq(lis3->irq, lis302dl_interrupt,
1239 thread_fn,
1240 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
1241 irq_flags,
1242 DRIVER_NAME, lis3);
1243
1244 if (err < 0) {
1245 pr_err("Cannot get IRQ\n");
1246 goto out;
1247 }
1248
1249 lis3->miscdev.minor = MISC_DYNAMIC_MINOR;
1250 lis3->miscdev.name = "freefall";
1251 lis3->miscdev.fops = &lis3lv02d_misc_fops;
1252
1253 if (misc_register(&lis3->miscdev))
1254 pr_err("misc_register failed\n");
1255out:
1256 return 0;
1257}
1258EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
1259
1260MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1261MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1262MODULE_LICENSE("GPL");
1263
