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1/*
2 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
3 *
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/kernel.h>
26#include <linux/init.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 "lis3lv02d.h"
43
44#define DRIVER_NAME "lis3lv02d"
45
46/* joystick device poll interval in milliseconds */
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 /* In milliseconds */
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 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
62 * because they are generated even if the data do not change. So it's better
63 * to keep the interrupt for the free-fall event. The values are updated at
64 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
65 * some low processor, we poll the sensor only at 20Hz... enough for the
66 * joystick.
67 */
68
69#define LIS3_PWRON_DELAY_WAI_12B (5000)
70#define LIS3_PWRON_DELAY_WAI_8B (3000)
71
72/*
73 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
74 * LIS302D spec says: 18 mG / digit
75 * LIS3_ACCURACY is used to increase accuracy of the intermediate
76 * calculation results.
77 */
78#define LIS3_ACCURACY 1024
79/* Sensitivity values for -2G +2G scale */
80#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
81#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
82
83#define LIS3_DEFAULT_FUZZ_12B 3
84#define LIS3_DEFAULT_FLAT_12B 3
85#define LIS3_DEFAULT_FUZZ_8B 1
86#define LIS3_DEFAULT_FLAT_8B 1
87
88struct lis3lv02d lis3_dev = {
89 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
90};
91EXPORT_SYMBOL_GPL(lis3_dev);
92
93/* just like param_set_int() but does sanity-check so that it won't point
94 * over the axis array size
95 */
96static int param_set_axis(const char *val, const struct kernel_param *kp)
97{
98 int ret = param_set_int(val, kp);
99 if (!ret) {
100 int val = *(int *)kp->arg;
101 if (val < 0)
102 val = -val;
103 if (!val || val > 3)
104 return -EINVAL;
105 }
106 return ret;
107}
108
109static struct kernel_param_ops param_ops_axis = {
110 .set = param_set_axis,
111 .get = param_get_int,
112};
113
114module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
115MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
116
117static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
118{
119 s8 lo;
120 if (lis3->read(lis3, reg, &lo) < 0)
121 return 0;
122
123 return lo;
124}
125
126static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
127{
128 u8 lo, hi;
129
130 lis3->read(lis3, reg - 1, &lo);
131 lis3->read(lis3, reg, &hi);
132 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
133 return (s16)((hi << 8) | lo);
134}
135
136/**
137 * lis3lv02d_get_axis - For the given axis, give the value converted
138 * @axis: 1,2,3 - can also be negative
139 * @hw_values: raw values returned by the hardware
140 *
141 * Returns the converted value.
142 */
143static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
144{
145 if (axis > 0)
146 return hw_values[axis - 1];
147 else
148 return -hw_values[-axis - 1];
149}
150
151/**
152 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
153 * @lis3: pointer to the device struct
154 * @x: where to store the X axis value
155 * @y: where to store the Y axis value
156 * @z: where to store the Z axis value
157 *
158 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
159 */
160static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
161{
162 int position[3];
163 int i;
164
165 if (lis3->blkread) {
166 if (lis3_dev.whoami == WAI_12B) {
167 u16 data[3];
168 lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
169 for (i = 0; i < 3; i++)
170 position[i] = (s16)le16_to_cpu(data[i]);
171 } else {
172 u8 data[5];
173 /* Data: x, dummy, y, dummy, z */
174 lis3->blkread(lis3, OUTX, 5, data);
175 for (i = 0; i < 3; i++)
176 position[i] = (s8)data[i * 2];
177 }
178 } else {
179 position[0] = lis3->read_data(lis3, OUTX);
180 position[1] = lis3->read_data(lis3, OUTY);
181 position[2] = lis3->read_data(lis3, OUTZ);
182 }
183
184 for (i = 0; i < 3; i++)
185 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
186
187 *x = lis3lv02d_get_axis(lis3->ac.x, position);
188 *y = lis3lv02d_get_axis(lis3->ac.y, position);
189 *z = lis3lv02d_get_axis(lis3->ac.z, position);
190}
191
192/* conversion btw sampling rate and the register values */
193static int lis3_12_rates[4] = {40, 160, 640, 2560};
194static int lis3_8_rates[2] = {100, 400};
195static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
196
197/* ODR is Output Data Rate */
198static int lis3lv02d_get_odr(void)
199{
200 u8 ctrl;
201 int shift;
202
203 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
204 ctrl &= lis3_dev.odr_mask;
205 shift = ffs(lis3_dev.odr_mask) - 1;
206 return lis3_dev.odrs[(ctrl >> shift)];
207}
208
209static int lis3lv02d_set_odr(int rate)
210{
211 u8 ctrl;
212 int i, len, shift;
213
214 if (!rate)
215 return -EINVAL;
216
217 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
218 ctrl &= ~lis3_dev.odr_mask;
219 len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
220 shift = ffs(lis3_dev.odr_mask) - 1;
221
222 for (i = 0; i < len; i++)
223 if (lis3_dev.odrs[i] == rate) {
224 lis3_dev.write(&lis3_dev, CTRL_REG1,
225 ctrl | (i << shift));
226 return 0;
227 }
228 return -EINVAL;
229}
230
231static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
232{
233 u8 ctlreg, reg;
234 s16 x, y, z;
235 u8 selftest;
236 int ret;
237 u8 ctrl_reg_data;
238 unsigned char irq_cfg;
239
240 mutex_lock(&lis3->mutex);
241
242 irq_cfg = lis3->irq_cfg;
243 if (lis3_dev.whoami == WAI_8B) {
244 lis3->data_ready_count[IRQ_LINE0] = 0;
245 lis3->data_ready_count[IRQ_LINE1] = 0;
246
247 /* Change interrupt cfg to data ready for selftest */
248 atomic_inc(&lis3_dev.wake_thread);
249 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
250 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
251 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
252 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
253 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
254 }
255
256 if (lis3_dev.whoami == WAI_3DC) {
257 ctlreg = CTRL_REG4;
258 selftest = CTRL4_ST0;
259 } else {
260 ctlreg = CTRL_REG1;
261 if (lis3_dev.whoami == WAI_12B)
262 selftest = CTRL1_ST;
263 else
264 selftest = CTRL1_STP;
265 }
266
267 lis3->read(lis3, ctlreg, ®);
268 lis3->write(lis3, ctlreg, (reg | selftest));
269 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
270
271 /* Read directly to avoid axis remap */
272 x = lis3->read_data(lis3, OUTX);
273 y = lis3->read_data(lis3, OUTY);
274 z = lis3->read_data(lis3, OUTZ);
275
276 /* back to normal settings */
277 lis3->write(lis3, ctlreg, reg);
278 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
279
280 results[0] = x - lis3->read_data(lis3, OUTX);
281 results[1] = y - lis3->read_data(lis3, OUTY);
282 results[2] = z - lis3->read_data(lis3, OUTZ);
283
284 ret = 0;
285
286 if (lis3_dev.whoami == WAI_8B) {
287 /* Restore original interrupt configuration */
288 atomic_dec(&lis3_dev.wake_thread);
289 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
290 lis3->irq_cfg = irq_cfg;
291
292 if ((irq_cfg & LIS3_IRQ1_MASK) &&
293 lis3->data_ready_count[IRQ_LINE0] < 2) {
294 ret = SELFTEST_IRQ;
295 goto fail;
296 }
297
298 if ((irq_cfg & LIS3_IRQ2_MASK) &&
299 lis3->data_ready_count[IRQ_LINE1] < 2) {
300 ret = SELFTEST_IRQ;
301 goto fail;
302 }
303 }
304
305 if (lis3->pdata) {
306 int i;
307 for (i = 0; i < 3; i++) {
308 /* Check against selftest acceptance limits */
309 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
310 (results[i] > lis3->pdata->st_max_limits[i])) {
311 ret = SELFTEST_FAIL;
312 goto fail;
313 }
314 }
315 }
316
317 /* test passed */
318fail:
319 mutex_unlock(&lis3->mutex);
320 return ret;
321}
322
323/*
324 * Order of registers in the list affects to order of the restore process.
325 * Perhaps it is a good idea to set interrupt enable register as a last one
326 * after all other configurations
327 */
328static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
329 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
330 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
331 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
332 CTRL_REG1, CTRL_REG2, CTRL_REG3};
333
334static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
335 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
336 DD_THSE_L, DD_THSE_H,
337 CTRL_REG1, CTRL_REG3, CTRL_REG2};
338
339static inline void lis3_context_save(struct lis3lv02d *lis3)
340{
341 int i;
342 for (i = 0; i < lis3->regs_size; i++)
343 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
344 lis3->regs_stored = true;
345}
346
347static inline void lis3_context_restore(struct lis3lv02d *lis3)
348{
349 int i;
350 if (lis3->regs_stored)
351 for (i = 0; i < lis3->regs_size; i++)
352 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
353}
354
355void lis3lv02d_poweroff(struct lis3lv02d *lis3)
356{
357 if (lis3->reg_ctrl)
358 lis3_context_save(lis3);
359 /* disable X,Y,Z axis and power down */
360 lis3->write(lis3, CTRL_REG1, 0x00);
361 if (lis3->reg_ctrl)
362 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
363}
364EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
365
366void lis3lv02d_poweron(struct lis3lv02d *lis3)
367{
368 u8 reg;
369
370 lis3->init(lis3);
371
372 /*
373 * Common configuration
374 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
375 * both have been read. So the value read will always be correct.
376 * Set BOOT bit to refresh factory tuning values.
377 */
378 if (lis3->pdata) {
379 lis3->read(lis3, CTRL_REG2, ®);
380 if (lis3->whoami == WAI_12B)
381 reg |= CTRL2_BDU | CTRL2_BOOT;
382 else
383 reg |= CTRL2_BOOT_8B;
384 lis3->write(lis3, CTRL_REG2, reg);
385 }
386
387 /* LIS3 power on delay is quite long */
388 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
389
390 if (lis3->reg_ctrl)
391 lis3_context_restore(lis3);
392}
393EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
394
395
396static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
397{
398 int x, y, z;
399
400 mutex_lock(&lis3_dev.mutex);
401 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
402 input_report_abs(pidev->input, ABS_X, x);
403 input_report_abs(pidev->input, ABS_Y, y);
404 input_report_abs(pidev->input, ABS_Z, z);
405 input_sync(pidev->input);
406 mutex_unlock(&lis3_dev.mutex);
407}
408
409static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
410{
411 if (lis3_dev.pm_dev)
412 pm_runtime_get_sync(lis3_dev.pm_dev);
413
414 if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev)
415 atomic_set(&lis3_dev.wake_thread, 1);
416 /*
417 * Update coordinates for the case where poll interval is 0 and
418 * the chip in running purely under interrupt control
419 */
420 lis3lv02d_joystick_poll(pidev);
421}
422
423static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
424{
425 atomic_set(&lis3_dev.wake_thread, 0);
426 if (lis3_dev.pm_dev)
427 pm_runtime_put(lis3_dev.pm_dev);
428}
429
430static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
431{
432 if (!test_bit(0, &lis3_dev.misc_opened))
433 goto out;
434
435 /*
436 * Be careful: on some HP laptops the bios force DD when on battery and
437 * the lid is closed. This leads to interrupts as soon as a little move
438 * is done.
439 */
440 atomic_inc(&lis3_dev.count);
441
442 wake_up_interruptible(&lis3_dev.misc_wait);
443 kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
444out:
445 if (atomic_read(&lis3_dev.wake_thread))
446 return IRQ_WAKE_THREAD;
447 return IRQ_HANDLED;
448}
449
450static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
451{
452 struct input_dev *dev = lis3->idev->input;
453 u8 click_src;
454
455 mutex_lock(&lis3->mutex);
456 lis3->read(lis3, CLICK_SRC, &click_src);
457
458 if (click_src & CLICK_SINGLE_X) {
459 input_report_key(dev, lis3->mapped_btns[0], 1);
460 input_report_key(dev, lis3->mapped_btns[0], 0);
461 }
462
463 if (click_src & CLICK_SINGLE_Y) {
464 input_report_key(dev, lis3->mapped_btns[1], 1);
465 input_report_key(dev, lis3->mapped_btns[1], 0);
466 }
467
468 if (click_src & CLICK_SINGLE_Z) {
469 input_report_key(dev, lis3->mapped_btns[2], 1);
470 input_report_key(dev, lis3->mapped_btns[2], 0);
471 }
472 input_sync(dev);
473 mutex_unlock(&lis3->mutex);
474}
475
476static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
477{
478 int dummy;
479
480 /* Dummy read to ack interrupt */
481 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
482 lis3->data_ready_count[index]++;
483}
484
485static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
486{
487 struct lis3lv02d *lis3 = data;
488 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
489
490 if (irq_cfg == LIS3_IRQ1_CLICK)
491 lis302dl_interrupt_handle_click(lis3);
492 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
493 lis302dl_data_ready(lis3, IRQ_LINE0);
494 else
495 lis3lv02d_joystick_poll(lis3->idev);
496
497 return IRQ_HANDLED;
498}
499
500static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
501{
502 struct lis3lv02d *lis3 = data;
503 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
504
505 if (irq_cfg == LIS3_IRQ2_CLICK)
506 lis302dl_interrupt_handle_click(lis3);
507 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
508 lis302dl_data_ready(lis3, IRQ_LINE1);
509 else
510 lis3lv02d_joystick_poll(lis3->idev);
511
512 return IRQ_HANDLED;
513}
514
515static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
516{
517 if (test_and_set_bit(0, &lis3_dev.misc_opened))
518 return -EBUSY; /* already open */
519
520 if (lis3_dev.pm_dev)
521 pm_runtime_get_sync(lis3_dev.pm_dev);
522
523 atomic_set(&lis3_dev.count, 0);
524 return 0;
525}
526
527static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
528{
529 fasync_helper(-1, file, 0, &lis3_dev.async_queue);
530 clear_bit(0, &lis3_dev.misc_opened); /* release the device */
531 if (lis3_dev.pm_dev)
532 pm_runtime_put(lis3_dev.pm_dev);
533 return 0;
534}
535
536static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
537 size_t count, loff_t *pos)
538{
539 DECLARE_WAITQUEUE(wait, current);
540 u32 data;
541 unsigned char byte_data;
542 ssize_t retval = 1;
543
544 if (count < 1)
545 return -EINVAL;
546
547 add_wait_queue(&lis3_dev.misc_wait, &wait);
548 while (true) {
549 set_current_state(TASK_INTERRUPTIBLE);
550 data = atomic_xchg(&lis3_dev.count, 0);
551 if (data)
552 break;
553
554 if (file->f_flags & O_NONBLOCK) {
555 retval = -EAGAIN;
556 goto out;
557 }
558
559 if (signal_pending(current)) {
560 retval = -ERESTARTSYS;
561 goto out;
562 }
563
564 schedule();
565 }
566
567 if (data < 255)
568 byte_data = data;
569 else
570 byte_data = 255;
571
572 /* make sure we are not going into copy_to_user() with
573 * TASK_INTERRUPTIBLE state */
574 set_current_state(TASK_RUNNING);
575 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
576 retval = -EFAULT;
577
578out:
579 __set_current_state(TASK_RUNNING);
580 remove_wait_queue(&lis3_dev.misc_wait, &wait);
581
582 return retval;
583}
584
585static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
586{
587 poll_wait(file, &lis3_dev.misc_wait, wait);
588 if (atomic_read(&lis3_dev.count))
589 return POLLIN | POLLRDNORM;
590 return 0;
591}
592
593static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
594{
595 return fasync_helper(fd, file, on, &lis3_dev.async_queue);
596}
597
598static const struct file_operations lis3lv02d_misc_fops = {
599 .owner = THIS_MODULE,
600 .llseek = no_llseek,
601 .read = lis3lv02d_misc_read,
602 .open = lis3lv02d_misc_open,
603 .release = lis3lv02d_misc_release,
604 .poll = lis3lv02d_misc_poll,
605 .fasync = lis3lv02d_misc_fasync,
606};
607
608static struct miscdevice lis3lv02d_misc_device = {
609 .minor = MISC_DYNAMIC_MINOR,
610 .name = "freefall",
611 .fops = &lis3lv02d_misc_fops,
612};
613
614int lis3lv02d_joystick_enable(void)
615{
616 struct input_dev *input_dev;
617 int err;
618 int max_val, fuzz, flat;
619 int btns[] = {BTN_X, BTN_Y, BTN_Z};
620
621 if (lis3_dev.idev)
622 return -EINVAL;
623
624 lis3_dev.idev = input_allocate_polled_device();
625 if (!lis3_dev.idev)
626 return -ENOMEM;
627
628 lis3_dev.idev->poll = lis3lv02d_joystick_poll;
629 lis3_dev.idev->open = lis3lv02d_joystick_open;
630 lis3_dev.idev->close = lis3lv02d_joystick_close;
631 lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
632 lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
633 lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
634 input_dev = lis3_dev.idev->input;
635
636 input_dev->name = "ST LIS3LV02DL Accelerometer";
637 input_dev->phys = DRIVER_NAME "/input0";
638 input_dev->id.bustype = BUS_HOST;
639 input_dev->id.vendor = 0;
640 input_dev->dev.parent = &lis3_dev.pdev->dev;
641
642 set_bit(EV_ABS, input_dev->evbit);
643 max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
644 if (lis3_dev.whoami == WAI_12B) {
645 fuzz = LIS3_DEFAULT_FUZZ_12B;
646 flat = LIS3_DEFAULT_FLAT_12B;
647 } else {
648 fuzz = LIS3_DEFAULT_FUZZ_8B;
649 flat = LIS3_DEFAULT_FLAT_8B;
650 }
651 fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
652 flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
653
654 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
655 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
656 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
657
658 lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns);
659 lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns);
660 lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns);
661
662 err = input_register_polled_device(lis3_dev.idev);
663 if (err) {
664 input_free_polled_device(lis3_dev.idev);
665 lis3_dev.idev = NULL;
666 }
667
668 return err;
669}
670EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
671
672void lis3lv02d_joystick_disable(void)
673{
674 if (lis3_dev.irq)
675 free_irq(lis3_dev.irq, &lis3_dev);
676 if (lis3_dev.pdata && lis3_dev.pdata->irq2)
677 free_irq(lis3_dev.pdata->irq2, &lis3_dev);
678
679 if (!lis3_dev.idev)
680 return;
681
682 if (lis3_dev.irq)
683 misc_deregister(&lis3lv02d_misc_device);
684 input_unregister_polled_device(lis3_dev.idev);
685 input_free_polled_device(lis3_dev.idev);
686 lis3_dev.idev = NULL;
687}
688EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
689
690/* Sysfs stuff */
691static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
692{
693 /*
694 * SYSFS functions are fast visitors so put-call
695 * immediately after the get-call. However, keep
696 * chip running for a while and schedule delayed
697 * suspend. This way periodic sysfs calls doesn't
698 * suffer from relatively long power up time.
699 */
700
701 if (lis3->pm_dev) {
702 pm_runtime_get_sync(lis3->pm_dev);
703 pm_runtime_put_noidle(lis3->pm_dev);
704 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
705 }
706}
707
708static ssize_t lis3lv02d_selftest_show(struct device *dev,
709 struct device_attribute *attr, char *buf)
710{
711 s16 values[3];
712
713 static const char ok[] = "OK";
714 static const char fail[] = "FAIL";
715 static const char irq[] = "FAIL_IRQ";
716 const char *res;
717
718 lis3lv02d_sysfs_poweron(&lis3_dev);
719 switch (lis3lv02d_selftest(&lis3_dev, values)) {
720 case SELFTEST_FAIL:
721 res = fail;
722 break;
723 case SELFTEST_IRQ:
724 res = irq;
725 break;
726 case SELFTEST_OK:
727 default:
728 res = ok;
729 break;
730 }
731 return sprintf(buf, "%s %d %d %d\n", res,
732 values[0], values[1], values[2]);
733}
734
735static ssize_t lis3lv02d_position_show(struct device *dev,
736 struct device_attribute *attr, char *buf)
737{
738 int x, y, z;
739
740 lis3lv02d_sysfs_poweron(&lis3_dev);
741 mutex_lock(&lis3_dev.mutex);
742 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
743 mutex_unlock(&lis3_dev.mutex);
744 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
745}
746
747static ssize_t lis3lv02d_rate_show(struct device *dev,
748 struct device_attribute *attr, char *buf)
749{
750 lis3lv02d_sysfs_poweron(&lis3_dev);
751 return sprintf(buf, "%d\n", lis3lv02d_get_odr());
752}
753
754static ssize_t lis3lv02d_rate_set(struct device *dev,
755 struct device_attribute *attr, const char *buf,
756 size_t count)
757{
758 unsigned long rate;
759
760 if (strict_strtoul(buf, 0, &rate))
761 return -EINVAL;
762
763 lis3lv02d_sysfs_poweron(&lis3_dev);
764 if (lis3lv02d_set_odr(rate))
765 return -EINVAL;
766
767 return count;
768}
769
770static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
771static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
772static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
773 lis3lv02d_rate_set);
774
775static struct attribute *lis3lv02d_attributes[] = {
776 &dev_attr_selftest.attr,
777 &dev_attr_position.attr,
778 &dev_attr_rate.attr,
779 NULL
780};
781
782static struct attribute_group lis3lv02d_attribute_group = {
783 .attrs = lis3lv02d_attributes
784};
785
786
787static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
788{
789 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
790 if (IS_ERR(lis3->pdev))
791 return PTR_ERR(lis3->pdev);
792
793 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
794}
795
796int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
797{
798 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
799 platform_device_unregister(lis3->pdev);
800 if (lis3->pm_dev) {
801 /* Barrier after the sysfs remove */
802 pm_runtime_barrier(lis3->pm_dev);
803
804 /* SYSFS may have left chip running. Turn off if necessary */
805 if (!pm_runtime_suspended(lis3->pm_dev))
806 lis3lv02d_poweroff(&lis3_dev);
807
808 pm_runtime_disable(lis3->pm_dev);
809 pm_runtime_set_suspended(lis3->pm_dev);
810 }
811 kfree(lis3->reg_cache);
812 return 0;
813}
814EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
815
816static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
817 struct lis3lv02d_platform_data *p)
818{
819 int err;
820 int ctrl2 = p->hipass_ctrl;
821
822 if (p->click_flags) {
823 dev->write(dev, CLICK_CFG, p->click_flags);
824 dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
825 dev->write(dev, CLICK_LATENCY, p->click_latency);
826 dev->write(dev, CLICK_WINDOW, p->click_window);
827 dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
828 dev->write(dev, CLICK_THSY_X,
829 (p->click_thresh_x & 0xf) |
830 (p->click_thresh_y << 4));
831
832 if (dev->idev) {
833 struct input_dev *input_dev = lis3_dev.idev->input;
834 input_set_capability(input_dev, EV_KEY, BTN_X);
835 input_set_capability(input_dev, EV_KEY, BTN_Y);
836 input_set_capability(input_dev, EV_KEY, BTN_Z);
837 }
838 }
839
840 if (p->wakeup_flags) {
841 dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
842 dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
843 /* pdata value + 1 to keep this backward compatible*/
844 dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
845 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
846 }
847
848 if (p->wakeup_flags2) {
849 dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
850 dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
851 /* pdata value + 1 to keep this backward compatible*/
852 dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
853 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
854 }
855 /* Configure hipass filters */
856 dev->write(dev, CTRL_REG2, ctrl2);
857
858 if (p->irq2) {
859 err = request_threaded_irq(p->irq2,
860 NULL,
861 lis302dl_interrupt_thread2_8b,
862 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
863 (p->irq_flags2 & IRQF_TRIGGER_MASK),
864 DRIVER_NAME, &lis3_dev);
865 if (err < 0)
866 pr_err("No second IRQ. Limited functionality\n");
867 }
868}
869
870/*
871 * Initialise the accelerometer and the various subsystems.
872 * Should be rather independent of the bus system.
873 */
874int lis3lv02d_init_device(struct lis3lv02d *dev)
875{
876 int err;
877 irq_handler_t thread_fn;
878 int irq_flags = 0;
879
880 dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
881
882 switch (dev->whoami) {
883 case WAI_12B:
884 pr_info("12 bits sensor found\n");
885 dev->read_data = lis3lv02d_read_12;
886 dev->mdps_max_val = 2048;
887 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
888 dev->odrs = lis3_12_rates;
889 dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
890 dev->scale = LIS3_SENSITIVITY_12B;
891 dev->regs = lis3_wai12_regs;
892 dev->regs_size = ARRAY_SIZE(lis3_wai12_regs);
893 break;
894 case WAI_8B:
895 pr_info("8 bits sensor found\n");
896 dev->read_data = lis3lv02d_read_8;
897 dev->mdps_max_val = 128;
898 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
899 dev->odrs = lis3_8_rates;
900 dev->odr_mask = CTRL1_DR;
901 dev->scale = LIS3_SENSITIVITY_8B;
902 dev->regs = lis3_wai8_regs;
903 dev->regs_size = ARRAY_SIZE(lis3_wai8_regs);
904 break;
905 case WAI_3DC:
906 pr_info("8 bits 3DC sensor found\n");
907 dev->read_data = lis3lv02d_read_8;
908 dev->mdps_max_val = 128;
909 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
910 dev->odrs = lis3_3dc_rates;
911 dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
912 dev->scale = LIS3_SENSITIVITY_8B;
913 break;
914 default:
915 pr_err("unknown sensor type 0x%X\n", dev->whoami);
916 return -EINVAL;
917 }
918
919 dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
920 sizeof(lis3_wai12_regs)), GFP_KERNEL);
921
922 if (dev->reg_cache == NULL) {
923 printk(KERN_ERR DRIVER_NAME "out of memory\n");
924 return -ENOMEM;
925 }
926
927 mutex_init(&dev->mutex);
928 atomic_set(&dev->wake_thread, 0);
929
930 lis3lv02d_add_fs(dev);
931 lis3lv02d_poweron(dev);
932
933 if (dev->pm_dev) {
934 pm_runtime_set_active(dev->pm_dev);
935 pm_runtime_enable(dev->pm_dev);
936 }
937
938 if (lis3lv02d_joystick_enable())
939 pr_err("joystick initialization failed\n");
940
941 /* passing in platform specific data is purely optional and only
942 * used by the SPI transport layer at the moment */
943 if (dev->pdata) {
944 struct lis3lv02d_platform_data *p = dev->pdata;
945
946 if (dev->whoami == WAI_8B)
947 lis3lv02d_8b_configure(dev, p);
948
949 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
950
951 dev->irq_cfg = p->irq_cfg;
952 if (p->irq_cfg)
953 dev->write(dev, CTRL_REG3, p->irq_cfg);
954
955 if (p->default_rate)
956 lis3lv02d_set_odr(p->default_rate);
957 }
958
959 /* bail if we did not get an IRQ from the bus layer */
960 if (!dev->irq) {
961 pr_debug("No IRQ. Disabling /dev/freefall\n");
962 goto out;
963 }
964
965 /*
966 * The sensor can generate interrupts for free-fall and direction
967 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
968 * the things simple and _fast_ we activate it only for free-fall, so
969 * no need to read register (very slow with ACPI). For the same reason,
970 * we forbid shared interrupts.
971 *
972 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
973 * io-apic is not configurable (and generates a warning) but I keep it
974 * in case of support for other hardware.
975 */
976 if (dev->pdata && dev->whoami == WAI_8B)
977 thread_fn = lis302dl_interrupt_thread1_8b;
978 else
979 thread_fn = NULL;
980
981 err = request_threaded_irq(dev->irq, lis302dl_interrupt,
982 thread_fn,
983 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
984 irq_flags,
985 DRIVER_NAME, &lis3_dev);
986
987 if (err < 0) {
988 pr_err("Cannot get IRQ\n");
989 goto out;
990 }
991
992 if (misc_register(&lis3lv02d_misc_device))
993 pr_err("misc_register failed\n");
994out:
995 return 0;
996}
997EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
998
999MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1000MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1001MODULE_LICENSE("GPL");
1/*
2 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
3 *
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#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/* joystick device poll interval in milliseconds */
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 /* In milliseconds */
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 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
62 * because they are generated even if the data do not change. So it's better
63 * to keep the interrupt for the free-fall event. The values are updated at
64 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
65 * some low processor, we poll the sensor only at 20Hz... enough for the
66 * joystick.
67 */
68
69#define LIS3_PWRON_DELAY_WAI_12B (5000)
70#define LIS3_PWRON_DELAY_WAI_8B (3000)
71
72/*
73 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
74 * LIS302D spec says: 18 mG / digit
75 * LIS3_ACCURACY is used to increase accuracy of the intermediate
76 * calculation results.
77 */
78#define LIS3_ACCURACY 1024
79/* Sensitivity values for -2G +2G scale */
80#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
81#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
82
83/*
84 * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG.
85 * Below macros defines sensitivity values for +/-2G. Dataout bits for
86 * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit
87 * data from 16bit value. Currently this driver supports only 2G range.
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/* just like param_set_int() but does sanity-check so that it won't point
103 * over the axis array size
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 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
144 return (s16)((hi << 8) | lo);
145}
146
147/* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */
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 * lis3lv02d_get_axis - For the given axis, give the value converted
162 * @axis: 1,2,3 - can also be negative
163 * @hw_values: raw values returned by the hardware
164 *
165 * Returns the converted value.
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 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
177 * @lis3: pointer to the device struct
178 * @x: where to store the X axis value
179 * @y: where to store the Y axis value
180 * @z: where to store the Z axis value
181 *
182 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
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 /* Data: x, dummy, y, dummy, z */
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/* conversion btw sampling rate and the register values */
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/* ODR is Output Data Rate */
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 /* LIS3 power on delay is quite long */
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); /* # of possible values */
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 /* Change interrupt cfg to data ready for selftest */
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 /* Read directly to avoid axis remap */
311 x = lis3->read_data(lis3, OUTX);
312 y = lis3->read_data(lis3, OUTY);
313 z = lis3->read_data(lis3, OUTZ);
314
315 /* back to normal settings */
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 /* Restore original interrupt configuration */
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 /* Check against selftest acceptance limits */
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 /* test passed */
359fail:
360 mutex_unlock(&lis3->mutex);
361 return ret;
362}
363
364/*
365 * Order of registers in the list affects to order of the restore process.
366 * Perhaps it is a good idea to set interrupt enable register as a last one
367 * after all other configurations
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 /* disable X,Y,Z axis and power down */
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 * Common configuration
416 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
417 * both have been read. So the value read will always be correct.
418 * Set BOOT bit to refresh factory tuning values.
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 * Update coordinates for the case where poll interval is 0 and
474 * the chip in running purely under interrupt control
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 * Be careful: on some HP laptops the bios force DD when on battery and
497 * the lid is closed. This leads to interrupts as soon as a little move
498 * is done.
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 /* Dummy read to ack interrupt */
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; /* already open */
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); /* release the device */
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 /* make sure we are not going into copy_to_user() with
641 * TASK_INTERRUPTIBLE state */
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/* Sysfs stuff */
760static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
761{
762 /*
763 * SYSFS functions are fast visitors so put-call
764 * immediately after the get-call. However, keep
765 * chip running for a while and schedule delayed
766 * suspend. This way periodic sysfs calls doesn't
767 * suffer from relatively long power up time.
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 /* Barrier after the sysfs remove */
879 pm_runtime_barrier(lis3->pm_dev);
880
881 /* SYSFS may have left chip running. Turn off if necessary */
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 /* pdata value + 1 to keep this backward compatible*/
921 lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1);
922 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
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 /* pdata value + 1 to keep this backward compatible*/
929 lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1);
930 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
931 }
932 /* Configure hipass filters */
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 * Initialise the accelerometer and the various subsystems.
1115 * Should be rather independent of the bus system.
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; /* 12 bits for 2G */
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 /* passing in platform specific data is purely optional and only
1199 * used by the SPI transport layer at the moment */
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 /* bail if we did not get an IRQ from the bus layer */
1217 if (!lis3->irq) {
1218 pr_debug("No IRQ. Disabling /dev/freefall\n");
1219 goto out;
1220 }
1221
1222 /*
1223 * The sensor can generate interrupts for free-fall and direction
1224 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
1225 * the things simple and _fast_ we activate it only for free-fall, so
1226 * no need to read register (very slow with ACPI). For the same reason,
1227 * we forbid shared interrupts.
1228 *
1229 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
1230 * io-apic is not configurable (and generates a warning) but I keep it
1231 * in case of support for other hardware.
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");