2 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
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.
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.
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
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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"
44 #define DRIVER_NAME "lis3lv02d"
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
51 #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
54 #define SELFTEST_FAIL -1
55 #define SELFTEST_IRQ -2
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
69 #define LIS3_PWRON_DELAY_WAI_12B (5000)
70 #define LIS3_PWRON_DELAY_WAI_8B (3000)
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.
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)
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.
89 #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
90 #define SHIFT_ADJ_2G 4
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
97 struct lis3lv02d lis3_dev = {
98 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
100 EXPORT_SYMBOL_GPL(lis3_dev);
102 /* just like param_set_int() but does sanity-check so that it won't point
103 * over the axis array size
105 static int param_set_axis(const char *val, const struct kernel_param *kp)
107 int ret = param_set_int(val, kp);
109 int val = *(int *)kp->arg;
118 static const struct kernel_param_ops param_ops_axis = {
119 .set = param_set_axis,
120 .get = param_get_int,
123 #define param_check_axis(name, p) param_check_int(name, p)
125 module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
126 MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
128 static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
131 if (lis3->read(lis3, reg, &lo) < 0)
137 static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
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);
147 /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */
148 static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg)
153 lis3->read(lis3, reg - 1, &lo);
154 lis3->read(lis3, reg, &hi);
155 v = (int) ((hi << 8) | lo);
157 return (s16) v >> lis3->shift_adj;
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
165 * Returns the converted value.
167 static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
170 return hw_values[axis - 1];
172 return -hw_values[-axis - 1];
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
182 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
184 static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
190 if (lis3->whoami == WAI_12B) {
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]);
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];
203 position[0] = lis3->read_data(lis3, OUTX);
204 position[1] = lis3->read_data(lis3, OUTY);
205 position[2] = lis3->read_data(lis3, OUTZ);
208 for (i = 0; i < 3; i++)
209 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
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);
216 /* conversion btw sampling rate and the register values */
217 static int lis3_12_rates[4] = {40, 160, 640, 2560};
218 static int lis3_8_rates[2] = {100, 400};
219 static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
220 static int lis3_3dlh_rates[4] = {50, 100, 400, 1000};
222 /* ODR is Output Data Rate */
223 static int lis3lv02d_get_odr_index(struct lis3lv02d *lis3)
228 lis3->read(lis3, CTRL_REG1, &ctrl);
229 ctrl &= lis3->odr_mask;
230 shift = ffs(lis3->odr_mask) - 1;
231 return (ctrl >> shift);
234 static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3)
236 int odr_idx = lis3lv02d_get_odr_index(lis3);
237 int div = lis3->odrs[odr_idx];
241 /* Power-down mode, not sampling no need to sleep */
245 dev_err(&lis3->pdev->dev, "Error unknown odrs-index: %d\n", odr_idx);
249 /* LIS3 power on delay is quite long */
250 msleep(lis3->pwron_delay / div);
254 static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate)
262 lis3->read(lis3, CTRL_REG1, &ctrl);
263 ctrl &= ~lis3->odr_mask;
264 len = 1 << hweight_long(lis3->odr_mask); /* # of possible values */
265 shift = ffs(lis3->odr_mask) - 1;
267 for (i = 0; i < len; i++)
268 if (lis3->odrs[i] == rate) {
269 lis3->write(lis3, CTRL_REG1,
270 ctrl | (i << shift));
276 static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
283 unsigned char irq_cfg;
285 mutex_lock(&lis3->mutex);
287 irq_cfg = lis3->irq_cfg;
288 if (lis3->whoami == WAI_8B) {
289 lis3->data_ready_count[IRQ_LINE0] = 0;
290 lis3->data_ready_count[IRQ_LINE1] = 0;
292 /* Change interrupt cfg to data ready for selftest */
293 atomic_inc(&lis3->wake_thread);
294 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
295 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
296 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
297 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
298 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
301 if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) {
303 selftest = CTRL4_ST0;
306 if (lis3->whoami == WAI_12B)
309 selftest = CTRL1_STP;
312 lis3->read(lis3, ctlreg, ®);
313 lis3->write(lis3, ctlreg, (reg | selftest));
314 ret = lis3lv02d_get_pwron_wait(lis3);
318 /* Read directly to avoid axis remap */
319 x = lis3->read_data(lis3, OUTX);
320 y = lis3->read_data(lis3, OUTY);
321 z = lis3->read_data(lis3, OUTZ);
323 /* back to normal settings */
324 lis3->write(lis3, ctlreg, reg);
325 ret = lis3lv02d_get_pwron_wait(lis3);
329 results[0] = x - lis3->read_data(lis3, OUTX);
330 results[1] = y - lis3->read_data(lis3, OUTY);
331 results[2] = z - lis3->read_data(lis3, OUTZ);
335 if (lis3->whoami == WAI_8B) {
336 /* Restore original interrupt configuration */
337 atomic_dec(&lis3->wake_thread);
338 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
339 lis3->irq_cfg = irq_cfg;
341 if ((irq_cfg & LIS3_IRQ1_MASK) &&
342 lis3->data_ready_count[IRQ_LINE0] < 2) {
347 if ((irq_cfg & LIS3_IRQ2_MASK) &&
348 lis3->data_ready_count[IRQ_LINE1] < 2) {
356 for (i = 0; i < 3; i++) {
357 /* Check against selftest acceptance limits */
358 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
359 (results[i] > lis3->pdata->st_max_limits[i])) {
368 mutex_unlock(&lis3->mutex);
373 * Order of registers in the list affects to order of the restore process.
374 * Perhaps it is a good idea to set interrupt enable register as a last one
375 * after all other configurations
377 static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
378 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
379 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
380 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
381 CTRL_REG1, CTRL_REG2, CTRL_REG3};
383 static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
384 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
385 DD_THSE_L, DD_THSE_H,
386 CTRL_REG1, CTRL_REG3, CTRL_REG2};
388 static inline void lis3_context_save(struct lis3lv02d *lis3)
391 for (i = 0; i < lis3->regs_size; i++)
392 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
393 lis3->regs_stored = true;
396 static inline void lis3_context_restore(struct lis3lv02d *lis3)
399 if (lis3->regs_stored)
400 for (i = 0; i < lis3->regs_size; i++)
401 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
404 void lis3lv02d_poweroff(struct lis3lv02d *lis3)
407 lis3_context_save(lis3);
408 /* disable X,Y,Z axis and power down */
409 lis3->write(lis3, CTRL_REG1, 0x00);
411 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
413 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
415 int lis3lv02d_poweron(struct lis3lv02d *lis3)
423 * Common configuration
424 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
425 * both have been read. So the value read will always be correct.
426 * Set BOOT bit to refresh factory tuning values.
429 lis3->read(lis3, CTRL_REG2, ®);
430 if (lis3->whoami == WAI_12B)
431 reg |= CTRL2_BDU | CTRL2_BOOT;
432 else if (lis3->whoami == WAI_3DLH)
433 reg |= CTRL2_BOOT_3DLH;
435 reg |= CTRL2_BOOT_8B;
436 lis3->write(lis3, CTRL_REG2, reg);
438 if (lis3->whoami == WAI_3DLH) {
439 lis3->read(lis3, CTRL_REG4, ®);
441 lis3->write(lis3, CTRL_REG4, reg);
445 err = lis3lv02d_get_pwron_wait(lis3);
450 lis3_context_restore(lis3);
454 EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
457 static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
459 struct lis3lv02d *lis3 = pidev->private;
462 mutex_lock(&lis3->mutex);
463 lis3lv02d_get_xyz(lis3, &x, &y, &z);
464 input_report_abs(pidev->input, ABS_X, x);
465 input_report_abs(pidev->input, ABS_Y, y);
466 input_report_abs(pidev->input, ABS_Z, z);
467 input_sync(pidev->input);
468 mutex_unlock(&lis3->mutex);
471 static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
473 struct lis3lv02d *lis3 = pidev->private;
476 pm_runtime_get_sync(lis3->pm_dev);
478 if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev)
479 atomic_set(&lis3->wake_thread, 1);
481 * Update coordinates for the case where poll interval is 0 and
482 * the chip in running purely under interrupt control
484 lis3lv02d_joystick_poll(pidev);
487 static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
489 struct lis3lv02d *lis3 = pidev->private;
491 atomic_set(&lis3->wake_thread, 0);
493 pm_runtime_put(lis3->pm_dev);
496 static irqreturn_t lis302dl_interrupt(int irq, void *data)
498 struct lis3lv02d *lis3 = data;
500 if (!test_bit(0, &lis3->misc_opened))
504 * Be careful: on some HP laptops the bios force DD when on battery and
505 * the lid is closed. This leads to interrupts as soon as a little move
508 atomic_inc(&lis3->count);
510 wake_up_interruptible(&lis3->misc_wait);
511 kill_fasync(&lis3->async_queue, SIGIO, POLL_IN);
513 if (atomic_read(&lis3->wake_thread))
514 return IRQ_WAKE_THREAD;
518 static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
520 struct input_dev *dev = lis3->idev->input;
523 mutex_lock(&lis3->mutex);
524 lis3->read(lis3, CLICK_SRC, &click_src);
526 if (click_src & CLICK_SINGLE_X) {
527 input_report_key(dev, lis3->mapped_btns[0], 1);
528 input_report_key(dev, lis3->mapped_btns[0], 0);
531 if (click_src & CLICK_SINGLE_Y) {
532 input_report_key(dev, lis3->mapped_btns[1], 1);
533 input_report_key(dev, lis3->mapped_btns[1], 0);
536 if (click_src & CLICK_SINGLE_Z) {
537 input_report_key(dev, lis3->mapped_btns[2], 1);
538 input_report_key(dev, lis3->mapped_btns[2], 0);
541 mutex_unlock(&lis3->mutex);
544 static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
548 /* Dummy read to ack interrupt */
549 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
550 lis3->data_ready_count[index]++;
553 static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
555 struct lis3lv02d *lis3 = data;
556 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
558 if (irq_cfg == LIS3_IRQ1_CLICK)
559 lis302dl_interrupt_handle_click(lis3);
560 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
561 lis302dl_data_ready(lis3, IRQ_LINE0);
563 lis3lv02d_joystick_poll(lis3->idev);
568 static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
570 struct lis3lv02d *lis3 = data;
571 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
573 if (irq_cfg == LIS3_IRQ2_CLICK)
574 lis302dl_interrupt_handle_click(lis3);
575 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
576 lis302dl_data_ready(lis3, IRQ_LINE1);
578 lis3lv02d_joystick_poll(lis3->idev);
583 static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
585 struct lis3lv02d *lis3 = container_of(file->private_data,
586 struct lis3lv02d, miscdev);
588 if (test_and_set_bit(0, &lis3->misc_opened))
589 return -EBUSY; /* already open */
592 pm_runtime_get_sync(lis3->pm_dev);
594 atomic_set(&lis3->count, 0);
598 static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
600 struct lis3lv02d *lis3 = container_of(file->private_data,
601 struct lis3lv02d, miscdev);
603 clear_bit(0, &lis3->misc_opened); /* release the device */
605 pm_runtime_put(lis3->pm_dev);
609 static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
610 size_t count, loff_t *pos)
612 struct lis3lv02d *lis3 = container_of(file->private_data,
613 struct lis3lv02d, miscdev);
615 DECLARE_WAITQUEUE(wait, current);
617 unsigned char byte_data;
623 add_wait_queue(&lis3->misc_wait, &wait);
625 set_current_state(TASK_INTERRUPTIBLE);
626 data = atomic_xchg(&lis3->count, 0);
630 if (file->f_flags & O_NONBLOCK) {
635 if (signal_pending(current)) {
636 retval = -ERESTARTSYS;
648 /* make sure we are not going into copy_to_user() with
649 * TASK_INTERRUPTIBLE state */
650 set_current_state(TASK_RUNNING);
651 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
655 __set_current_state(TASK_RUNNING);
656 remove_wait_queue(&lis3->misc_wait, &wait);
661 static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
663 struct lis3lv02d *lis3 = container_of(file->private_data,
664 struct lis3lv02d, miscdev);
666 poll_wait(file, &lis3->misc_wait, wait);
667 if (atomic_read(&lis3->count))
668 return POLLIN | POLLRDNORM;
672 static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
674 struct lis3lv02d *lis3 = container_of(file->private_data,
675 struct lis3lv02d, miscdev);
677 return fasync_helper(fd, file, on, &lis3->async_queue);
680 static const struct file_operations lis3lv02d_misc_fops = {
681 .owner = THIS_MODULE,
683 .read = lis3lv02d_misc_read,
684 .open = lis3lv02d_misc_open,
685 .release = lis3lv02d_misc_release,
686 .poll = lis3lv02d_misc_poll,
687 .fasync = lis3lv02d_misc_fasync,
690 int lis3lv02d_joystick_enable(struct lis3lv02d *lis3)
692 struct input_dev *input_dev;
694 int max_val, fuzz, flat;
695 int btns[] = {BTN_X, BTN_Y, BTN_Z};
700 lis3->idev = input_allocate_polled_device();
704 lis3->idev->poll = lis3lv02d_joystick_poll;
705 lis3->idev->open = lis3lv02d_joystick_open;
706 lis3->idev->close = lis3lv02d_joystick_close;
707 lis3->idev->poll_interval = MDPS_POLL_INTERVAL;
708 lis3->idev->poll_interval_min = MDPS_POLL_MIN;
709 lis3->idev->poll_interval_max = MDPS_POLL_MAX;
710 lis3->idev->private = lis3;
711 input_dev = lis3->idev->input;
713 input_dev->name = "ST LIS3LV02DL Accelerometer";
714 input_dev->phys = DRIVER_NAME "/input0";
715 input_dev->id.bustype = BUS_HOST;
716 input_dev->id.vendor = 0;
717 input_dev->dev.parent = &lis3->pdev->dev;
719 set_bit(EV_ABS, input_dev->evbit);
720 max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY;
721 if (lis3->whoami == WAI_12B) {
722 fuzz = LIS3_DEFAULT_FUZZ_12B;
723 flat = LIS3_DEFAULT_FLAT_12B;
725 fuzz = LIS3_DEFAULT_FUZZ_8B;
726 flat = LIS3_DEFAULT_FLAT_8B;
728 fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY;
729 flat = (flat * lis3->scale) / LIS3_ACCURACY;
731 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
732 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
733 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
735 lis3->mapped_btns[0] = lis3lv02d_get_axis(abs(lis3->ac.x), btns);
736 lis3->mapped_btns[1] = lis3lv02d_get_axis(abs(lis3->ac.y), btns);
737 lis3->mapped_btns[2] = lis3lv02d_get_axis(abs(lis3->ac.z), btns);
739 err = input_register_polled_device(lis3->idev);
741 input_free_polled_device(lis3->idev);
747 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
749 void lis3lv02d_joystick_disable(struct lis3lv02d *lis3)
752 free_irq(lis3->irq, lis3);
753 if (lis3->pdata && lis3->pdata->irq2)
754 free_irq(lis3->pdata->irq2, lis3);
760 misc_deregister(&lis3->miscdev);
761 input_unregister_polled_device(lis3->idev);
762 input_free_polled_device(lis3->idev);
765 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
768 static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
771 * SYSFS functions are fast visitors so put-call
772 * immediately after the get-call. However, keep
773 * chip running for a while and schedule delayed
774 * suspend. This way periodic sysfs calls doesn't
775 * suffer from relatively long power up time.
779 pm_runtime_get_sync(lis3->pm_dev);
780 pm_runtime_put_noidle(lis3->pm_dev);
781 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
785 static ssize_t lis3lv02d_selftest_show(struct device *dev,
786 struct device_attribute *attr, char *buf)
788 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
791 static const char ok[] = "OK";
792 static const char fail[] = "FAIL";
793 static const char irq[] = "FAIL_IRQ";
796 lis3lv02d_sysfs_poweron(lis3);
797 switch (lis3lv02d_selftest(lis3, values)) {
809 return sprintf(buf, "%s %d %d %d\n", res,
810 values[0], values[1], values[2]);
813 static ssize_t lis3lv02d_position_show(struct device *dev,
814 struct device_attribute *attr, char *buf)
816 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
819 lis3lv02d_sysfs_poweron(lis3);
820 mutex_lock(&lis3->mutex);
821 lis3lv02d_get_xyz(lis3, &x, &y, &z);
822 mutex_unlock(&lis3->mutex);
823 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
826 static ssize_t lis3lv02d_rate_show(struct device *dev,
827 struct device_attribute *attr, char *buf)
829 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
832 lis3lv02d_sysfs_poweron(lis3);
834 odr_idx = lis3lv02d_get_odr_index(lis3);
835 return sprintf(buf, "%d\n", lis3->odrs[odr_idx]);
838 static ssize_t lis3lv02d_rate_set(struct device *dev,
839 struct device_attribute *attr, const char *buf,
842 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
846 ret = kstrtoul(buf, 0, &rate);
850 lis3lv02d_sysfs_poweron(lis3);
851 if (lis3lv02d_set_odr(lis3, rate))
857 static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
858 static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
859 static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
862 static struct attribute *lis3lv02d_attributes[] = {
863 &dev_attr_selftest.attr,
864 &dev_attr_position.attr,
869 static struct attribute_group lis3lv02d_attribute_group = {
870 .attrs = lis3lv02d_attributes
874 static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
876 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
877 if (IS_ERR(lis3->pdev))
878 return PTR_ERR(lis3->pdev);
880 platform_set_drvdata(lis3->pdev, lis3);
881 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
884 int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
886 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
887 platform_device_unregister(lis3->pdev);
889 /* Barrier after the sysfs remove */
890 pm_runtime_barrier(lis3->pm_dev);
892 /* SYSFS may have left chip running. Turn off if necessary */
893 if (!pm_runtime_suspended(lis3->pm_dev))
894 lis3lv02d_poweroff(lis3);
896 pm_runtime_disable(lis3->pm_dev);
897 pm_runtime_set_suspended(lis3->pm_dev);
899 kfree(lis3->reg_cache);
902 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
904 static void lis3lv02d_8b_configure(struct lis3lv02d *lis3,
905 struct lis3lv02d_platform_data *p)
908 int ctrl2 = p->hipass_ctrl;
910 if (p->click_flags) {
911 lis3->write(lis3, CLICK_CFG, p->click_flags);
912 lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit);
913 lis3->write(lis3, CLICK_LATENCY, p->click_latency);
914 lis3->write(lis3, CLICK_WINDOW, p->click_window);
915 lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf);
916 lis3->write(lis3, CLICK_THSY_X,
917 (p->click_thresh_x & 0xf) |
918 (p->click_thresh_y << 4));
921 struct input_dev *input_dev = lis3->idev->input;
922 input_set_capability(input_dev, EV_KEY, BTN_X);
923 input_set_capability(input_dev, EV_KEY, BTN_Y);
924 input_set_capability(input_dev, EV_KEY, BTN_Z);
928 if (p->wakeup_flags) {
929 lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags);
930 lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
931 /* pdata value + 1 to keep this backward compatible*/
932 lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1);
933 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
936 if (p->wakeup_flags2) {
937 lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2);
938 lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
939 /* pdata value + 1 to keep this backward compatible*/
940 lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1);
941 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
943 /* Configure hipass filters */
944 lis3->write(lis3, CTRL_REG2, ctrl2);
947 err = request_threaded_irq(p->irq2,
949 lis302dl_interrupt_thread2_8b,
950 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
951 (p->irq_flags2 & IRQF_TRIGGER_MASK),
954 pr_err("No second IRQ. Limited functionality\n");
959 int lis3lv02d_init_dt(struct lis3lv02d *lis3)
961 struct lis3lv02d_platform_data *pdata;
962 struct device_node *np = lis3->of_node;
969 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
973 if (of_get_property(np, "st,click-single-x", NULL))
974 pdata->click_flags |= LIS3_CLICK_SINGLE_X;
975 if (of_get_property(np, "st,click-double-x", NULL))
976 pdata->click_flags |= LIS3_CLICK_DOUBLE_X;
978 if (of_get_property(np, "st,click-single-y", NULL))
979 pdata->click_flags |= LIS3_CLICK_SINGLE_Y;
980 if (of_get_property(np, "st,click-double-y", NULL))
981 pdata->click_flags |= LIS3_CLICK_DOUBLE_Y;
983 if (of_get_property(np, "st,click-single-z", NULL))
984 pdata->click_flags |= LIS3_CLICK_SINGLE_Z;
985 if (of_get_property(np, "st,click-double-z", NULL))
986 pdata->click_flags |= LIS3_CLICK_DOUBLE_Z;
988 if (!of_property_read_u32(np, "st,click-threshold-x", &val))
989 pdata->click_thresh_x = val;
990 if (!of_property_read_u32(np, "st,click-threshold-y", &val))
991 pdata->click_thresh_y = val;
992 if (!of_property_read_u32(np, "st,click-threshold-z", &val))
993 pdata->click_thresh_z = val;
995 if (!of_property_read_u32(np, "st,click-time-limit", &val))
996 pdata->click_time_limit = val;
997 if (!of_property_read_u32(np, "st,click-latency", &val))
998 pdata->click_latency = val;
999 if (!of_property_read_u32(np, "st,click-window", &val))
1000 pdata->click_window = val;
1002 if (of_get_property(np, "st,irq1-disable", NULL))
1003 pdata->irq_cfg |= LIS3_IRQ1_DISABLE;
1004 if (of_get_property(np, "st,irq1-ff-wu-1", NULL))
1005 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1;
1006 if (of_get_property(np, "st,irq1-ff-wu-2", NULL))
1007 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2;
1008 if (of_get_property(np, "st,irq1-data-ready", NULL))
1009 pdata->irq_cfg |= LIS3_IRQ1_DATA_READY;
1010 if (of_get_property(np, "st,irq1-click", NULL))
1011 pdata->irq_cfg |= LIS3_IRQ1_CLICK;
1013 if (of_get_property(np, "st,irq2-disable", NULL))
1014 pdata->irq_cfg |= LIS3_IRQ2_DISABLE;
1015 if (of_get_property(np, "st,irq2-ff-wu-1", NULL))
1016 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1;
1017 if (of_get_property(np, "st,irq2-ff-wu-2", NULL))
1018 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2;
1019 if (of_get_property(np, "st,irq2-data-ready", NULL))
1020 pdata->irq_cfg |= LIS3_IRQ2_DATA_READY;
1021 if (of_get_property(np, "st,irq2-click", NULL))
1022 pdata->irq_cfg |= LIS3_IRQ2_CLICK;
1024 if (of_get_property(np, "st,irq-open-drain", NULL))
1025 pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN;
1026 if (of_get_property(np, "st,irq-active-low", NULL))
1027 pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW;
1029 if (!of_property_read_u32(np, "st,wu-duration-1", &val))
1030 pdata->duration1 = val;
1031 if (!of_property_read_u32(np, "st,wu-duration-2", &val))
1032 pdata->duration2 = val;
1034 if (of_get_property(np, "st,wakeup-x-lo", NULL))
1035 pdata->wakeup_flags |= LIS3_WAKEUP_X_LO;
1036 if (of_get_property(np, "st,wakeup-x-hi", NULL))
1037 pdata->wakeup_flags |= LIS3_WAKEUP_X_HI;
1038 if (of_get_property(np, "st,wakeup-y-lo", NULL))
1039 pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO;
1040 if (of_get_property(np, "st,wakeup-y-hi", NULL))
1041 pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI;
1042 if (of_get_property(np, "st,wakeup-z-lo", NULL))
1043 pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO;
1044 if (of_get_property(np, "st,wakeup-z-hi", NULL))
1045 pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI;
1046 if (of_get_property(np, "st,wakeup-threshold", &val))
1047 pdata->wakeup_thresh = val;
1049 if (of_get_property(np, "st,wakeup2-x-lo", NULL))
1050 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_LO;
1051 if (of_get_property(np, "st,wakeup2-x-hi", NULL))
1052 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_HI;
1053 if (of_get_property(np, "st,wakeup2-y-lo", NULL))
1054 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_LO;
1055 if (of_get_property(np, "st,wakeup2-y-hi", NULL))
1056 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_HI;
1057 if (of_get_property(np, "st,wakeup2-z-lo", NULL))
1058 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_LO;
1059 if (of_get_property(np, "st,wakeup2-z-hi", NULL))
1060 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_HI;
1061 if (of_get_property(np, "st,wakeup2-threshold", &val))
1062 pdata->wakeup_thresh2 = val;
1064 if (!of_property_read_u32(np, "st,highpass-cutoff-hz", &val)) {
1067 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ;
1070 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ;
1073 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ;
1076 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ;
1081 if (of_get_property(np, "st,hipass1-disable", NULL))
1082 pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE;
1083 if (of_get_property(np, "st,hipass2-disable", NULL))
1084 pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE;
1086 if (of_property_read_s32(np, "st,axis-x", &sval) == 0)
1087 pdata->axis_x = sval;
1088 if (of_property_read_s32(np, "st,axis-y", &sval) == 0)
1089 pdata->axis_y = sval;
1090 if (of_property_read_s32(np, "st,axis-z", &sval) == 0)
1091 pdata->axis_z = sval;
1093 if (of_get_property(np, "st,default-rate", NULL))
1094 pdata->default_rate = val;
1096 if (of_property_read_s32(np, "st,min-limit-x", &sval) == 0)
1097 pdata->st_min_limits[0] = sval;
1098 if (of_property_read_s32(np, "st,min-limit-y", &sval) == 0)
1099 pdata->st_min_limits[1] = sval;
1100 if (of_property_read_s32(np, "st,min-limit-z", &sval) == 0)
1101 pdata->st_min_limits[2] = sval;
1103 if (of_property_read_s32(np, "st,max-limit-x", &sval) == 0)
1104 pdata->st_max_limits[0] = sval;
1105 if (of_property_read_s32(np, "st,max-limit-y", &sval) == 0)
1106 pdata->st_max_limits[1] = sval;
1107 if (of_property_read_s32(np, "st,max-limit-z", &sval) == 0)
1108 pdata->st_max_limits[2] = sval;
1111 lis3->pdata = pdata;
1117 int lis3lv02d_init_dt(struct lis3lv02d *lis3)
1122 EXPORT_SYMBOL_GPL(lis3lv02d_init_dt);
1125 * Initialise the accelerometer and the various subsystems.
1126 * Should be rather independent of the bus system.
1128 int lis3lv02d_init_device(struct lis3lv02d *lis3)
1131 irq_handler_t thread_fn;
1134 lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I);
1136 switch (lis3->whoami) {
1138 pr_info("12 bits sensor found\n");
1139 lis3->read_data = lis3lv02d_read_12;
1140 lis3->mdps_max_val = 2048;
1141 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
1142 lis3->odrs = lis3_12_rates;
1143 lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1;
1144 lis3->scale = LIS3_SENSITIVITY_12B;
1145 lis3->regs = lis3_wai12_regs;
1146 lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs);
1149 pr_info("8 bits 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_8_rates;
1154 lis3->odr_mask = CTRL1_DR;
1155 lis3->scale = LIS3_SENSITIVITY_8B;
1156 lis3->regs = lis3_wai8_regs;
1157 lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs);
1160 pr_info("8 bits 3DC sensor found\n");
1161 lis3->read_data = lis3lv02d_read_8;
1162 lis3->mdps_max_val = 128;
1163 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1164 lis3->odrs = lis3_3dc_rates;
1165 lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
1166 lis3->scale = LIS3_SENSITIVITY_8B;
1169 pr_info("16 bits lis331dlh sensor found\n");
1170 lis3->read_data = lis331dlh_read_data;
1171 lis3->mdps_max_val = 2048; /* 12 bits for 2G */
1172 lis3->shift_adj = SHIFT_ADJ_2G;
1173 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1174 lis3->odrs = lis3_3dlh_rates;
1175 lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1;
1176 lis3->scale = LIS3DLH_SENSITIVITY_2G;
1179 pr_err("unknown sensor type 0x%X\n", lis3->whoami);
1183 lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
1184 sizeof(lis3_wai12_regs)), GFP_KERNEL);
1186 if (lis3->reg_cache == NULL) {
1187 printk(KERN_ERR DRIVER_NAME "out of memory\n");
1191 mutex_init(&lis3->mutex);
1192 atomic_set(&lis3->wake_thread, 0);
1194 lis3lv02d_add_fs(lis3);
1195 err = lis3lv02d_poweron(lis3);
1197 lis3lv02d_remove_fs(lis3);
1202 pm_runtime_set_active(lis3->pm_dev);
1203 pm_runtime_enable(lis3->pm_dev);
1206 if (lis3lv02d_joystick_enable(lis3))
1207 pr_err("joystick initialization failed\n");
1209 /* passing in platform specific data is purely optional and only
1210 * used by the SPI transport layer at the moment */
1212 struct lis3lv02d_platform_data *p = lis3->pdata;
1214 if (lis3->whoami == WAI_8B)
1215 lis3lv02d_8b_configure(lis3, p);
1217 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
1219 lis3->irq_cfg = p->irq_cfg;
1221 lis3->write(lis3, CTRL_REG3, p->irq_cfg);
1223 if (p->default_rate)
1224 lis3lv02d_set_odr(lis3, p->default_rate);
1227 /* bail if we did not get an IRQ from the bus layer */
1229 pr_debug("No IRQ. Disabling /dev/freefall\n");
1234 * The sensor can generate interrupts for free-fall and direction
1235 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
1236 * the things simple and _fast_ we activate it only for free-fall, so
1237 * no need to read register (very slow with ACPI). For the same reason,
1238 * we forbid shared interrupts.
1240 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
1241 * io-apic is not configurable (and generates a warning) but I keep it
1242 * in case of support for other hardware.
1244 if (lis3->pdata && lis3->whoami == WAI_8B)
1245 thread_fn = lis302dl_interrupt_thread1_8b;
1249 err = request_threaded_irq(lis3->irq, lis302dl_interrupt,
1251 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
1256 pr_err("Cannot get IRQ\n");
1260 lis3->miscdev.minor = MISC_DYNAMIC_MINOR;
1261 lis3->miscdev.name = "freefall";
1262 lis3->miscdev.fops = &lis3lv02d_misc_fops;
1264 if (misc_register(&lis3->miscdev))
1265 pr_err("misc_register failed\n");
1269 EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
1271 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1272 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1273 MODULE_LICENSE("GPL");