1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
5 * Copyright (C) 2007-2008 Yan Burman
6 * Copyright (C) 2008 Eric Piel
7 * Copyright (C) 2008-2009 Pavel Machek
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/kernel.h>
13 #include <linux/sched/signal.h>
14 #include <linux/dmi.h>
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/platform_device.h>
18 #include <linux/interrupt.h>
19 #include <linux/input-polldev.h>
20 #include <linux/delay.h>
21 #include <linux/wait.h>
22 #include <linux/poll.h>
23 #include <linux/slab.h>
24 #include <linux/freezer.h>
25 #include <linux/uaccess.h>
26 #include <linux/miscdevice.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/atomic.h>
29 #include <linux/of_device.h>
30 #include "lis3lv02d.h"
32 #define DRIVER_NAME "lis3lv02d"
34 /* joystick device poll interval in milliseconds */
35 #define MDPS_POLL_INTERVAL 50
36 #define MDPS_POLL_MIN 0
37 #define MDPS_POLL_MAX 2000
39 #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
42 #define SELFTEST_FAIL -1
43 #define SELFTEST_IRQ -2
49 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
50 * because they are generated even if the data do not change. So it's better
51 * to keep the interrupt for the free-fall event. The values are updated at
52 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
53 * some low processor, we poll the sensor only at 20Hz... enough for the
57 #define LIS3_PWRON_DELAY_WAI_12B (5000)
58 #define LIS3_PWRON_DELAY_WAI_8B (3000)
61 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
62 * LIS302D spec says: 18 mG / digit
63 * LIS3_ACCURACY is used to increase accuracy of the intermediate
64 * calculation results.
66 #define LIS3_ACCURACY 1024
67 /* Sensitivity values for -2G +2G scale */
68 #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
69 #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
72 * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG.
73 * Below macros defines sensitivity values for +/-2G. Dataout bits for
74 * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit
75 * data from 16bit value. Currently this driver supports only 2G range.
77 #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
78 #define SHIFT_ADJ_2G 4
80 #define LIS3_DEFAULT_FUZZ_12B 3
81 #define LIS3_DEFAULT_FLAT_12B 3
82 #define LIS3_DEFAULT_FUZZ_8B 1
83 #define LIS3_DEFAULT_FLAT_8B 1
85 struct lis3lv02d lis3_dev
= {
86 .misc_wait
= __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev
.misc_wait
),
88 EXPORT_SYMBOL_GPL(lis3_dev
);
90 /* just like param_set_int() but does sanity-check so that it won't point
91 * over the axis array size
93 static int param_set_axis(const char *val
, const struct kernel_param
*kp
)
95 int ret
= param_set_int(val
, kp
);
97 int val
= *(int *)kp
->arg
;
106 static const struct kernel_param_ops param_ops_axis
= {
107 .set
= param_set_axis
,
108 .get
= param_get_int
,
111 #define param_check_axis(name, p) param_check_int(name, p)
113 module_param_array_named(axes
, lis3_dev
.ac
.as_array
, axis
, NULL
, 0644);
114 MODULE_PARM_DESC(axes
, "Axis-mapping for x,y,z directions");
116 static s16
lis3lv02d_read_8(struct lis3lv02d
*lis3
, int reg
)
119 if (lis3
->read(lis3
, reg
, &lo
) < 0)
125 static s16
lis3lv02d_read_12(struct lis3lv02d
*lis3
, int reg
)
129 lis3
->read(lis3
, reg
- 1, &lo
);
130 lis3
->read(lis3
, reg
, &hi
);
131 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
132 return (s16
)((hi
<< 8) | lo
);
135 /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */
136 static s16
lis331dlh_read_data(struct lis3lv02d
*lis3
, int reg
)
141 lis3
->read(lis3
, reg
- 1, &lo
);
142 lis3
->read(lis3
, reg
, &hi
);
143 v
= (int) ((hi
<< 8) | lo
);
145 return (s16
) v
>> lis3
->shift_adj
;
149 * lis3lv02d_get_axis - For the given axis, give the value converted
150 * @axis: 1,2,3 - can also be negative
151 * @hw_values: raw values returned by the hardware
153 * Returns the converted value.
155 static inline int lis3lv02d_get_axis(s8 axis
, int hw_values
[3])
158 return hw_values
[axis
- 1];
160 return -hw_values
[-axis
- 1];
164 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
165 * @lis3: pointer to the device struct
166 * @x: where to store the X axis value
167 * @y: where to store the Y axis value
168 * @z: where to store the Z axis value
170 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
172 static void lis3lv02d_get_xyz(struct lis3lv02d
*lis3
, int *x
, int *y
, int *z
)
178 if (lis3
->whoami
== WAI_12B
) {
180 lis3
->blkread(lis3
, OUTX_L
, 6, (u8
*)data
);
181 for (i
= 0; i
< 3; i
++)
182 position
[i
] = (s16
)le16_to_cpu(data
[i
]);
185 /* Data: x, dummy, y, dummy, z */
186 lis3
->blkread(lis3
, OUTX
, 5, data
);
187 for (i
= 0; i
< 3; i
++)
188 position
[i
] = (s8
)data
[i
* 2];
191 position
[0] = lis3
->read_data(lis3
, OUTX
);
192 position
[1] = lis3
->read_data(lis3
, OUTY
);
193 position
[2] = lis3
->read_data(lis3
, OUTZ
);
196 for (i
= 0; i
< 3; i
++)
197 position
[i
] = (position
[i
] * lis3
->scale
) / LIS3_ACCURACY
;
199 *x
= lis3lv02d_get_axis(lis3
->ac
.x
, position
);
200 *y
= lis3lv02d_get_axis(lis3
->ac
.y
, position
);
201 *z
= lis3lv02d_get_axis(lis3
->ac
.z
, position
);
204 /* conversion btw sampling rate and the register values */
205 static int lis3_12_rates
[4] = {40, 160, 640, 2560};
206 static int lis3_8_rates
[2] = {100, 400};
207 static int lis3_3dc_rates
[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
208 static int lis3_3dlh_rates
[4] = {50, 100, 400, 1000};
210 /* ODR is Output Data Rate */
211 static int lis3lv02d_get_odr(struct lis3lv02d
*lis3
)
216 lis3
->read(lis3
, CTRL_REG1
, &ctrl
);
217 ctrl
&= lis3
->odr_mask
;
218 shift
= ffs(lis3
->odr_mask
) - 1;
219 return lis3
->odrs
[(ctrl
>> shift
)];
222 static int lis3lv02d_get_pwron_wait(struct lis3lv02d
*lis3
)
224 int div
= lis3lv02d_get_odr(lis3
);
226 if (WARN_ONCE(div
== 0, "device returned spurious data"))
229 /* LIS3 power on delay is quite long */
230 msleep(lis3
->pwron_delay
/ div
);
234 static int lis3lv02d_set_odr(struct lis3lv02d
*lis3
, int rate
)
242 lis3
->read(lis3
, CTRL_REG1
, &ctrl
);
243 ctrl
&= ~lis3
->odr_mask
;
244 len
= 1 << hweight_long(lis3
->odr_mask
); /* # of possible values */
245 shift
= ffs(lis3
->odr_mask
) - 1;
247 for (i
= 0; i
< len
; i
++)
248 if (lis3
->odrs
[i
] == rate
) {
249 lis3
->write(lis3
, CTRL_REG1
,
250 ctrl
| (i
<< shift
));
256 static int lis3lv02d_selftest(struct lis3lv02d
*lis3
, s16 results
[3])
263 unsigned char irq_cfg
;
265 mutex_lock(&lis3
->mutex
);
267 irq_cfg
= lis3
->irq_cfg
;
268 if (lis3
->whoami
== WAI_8B
) {
269 lis3
->data_ready_count
[IRQ_LINE0
] = 0;
270 lis3
->data_ready_count
[IRQ_LINE1
] = 0;
272 /* Change interrupt cfg to data ready for selftest */
273 atomic_inc(&lis3
->wake_thread
);
274 lis3
->irq_cfg
= LIS3_IRQ1_DATA_READY
| LIS3_IRQ2_DATA_READY
;
275 lis3
->read(lis3
, CTRL_REG3
, &ctrl_reg_data
);
276 lis3
->write(lis3
, CTRL_REG3
, (ctrl_reg_data
&
277 ~(LIS3_IRQ1_MASK
| LIS3_IRQ2_MASK
)) |
278 (LIS3_IRQ1_DATA_READY
| LIS3_IRQ2_DATA_READY
));
281 if ((lis3
->whoami
== WAI_3DC
) || (lis3
->whoami
== WAI_3DLH
)) {
283 selftest
= CTRL4_ST0
;
286 if (lis3
->whoami
== WAI_12B
)
289 selftest
= CTRL1_STP
;
292 lis3
->read(lis3
, ctlreg
, ®
);
293 lis3
->write(lis3
, ctlreg
, (reg
| selftest
));
294 ret
= lis3lv02d_get_pwron_wait(lis3
);
298 /* Read directly to avoid axis remap */
299 x
= lis3
->read_data(lis3
, OUTX
);
300 y
= lis3
->read_data(lis3
, OUTY
);
301 z
= lis3
->read_data(lis3
, OUTZ
);
303 /* back to normal settings */
304 lis3
->write(lis3
, ctlreg
, reg
);
305 ret
= lis3lv02d_get_pwron_wait(lis3
);
309 results
[0] = x
- lis3
->read_data(lis3
, OUTX
);
310 results
[1] = y
- lis3
->read_data(lis3
, OUTY
);
311 results
[2] = z
- lis3
->read_data(lis3
, OUTZ
);
315 if (lis3
->whoami
== WAI_8B
) {
316 /* Restore original interrupt configuration */
317 atomic_dec(&lis3
->wake_thread
);
318 lis3
->write(lis3
, CTRL_REG3
, ctrl_reg_data
);
319 lis3
->irq_cfg
= irq_cfg
;
321 if ((irq_cfg
& LIS3_IRQ1_MASK
) &&
322 lis3
->data_ready_count
[IRQ_LINE0
] < 2) {
327 if ((irq_cfg
& LIS3_IRQ2_MASK
) &&
328 lis3
->data_ready_count
[IRQ_LINE1
] < 2) {
336 for (i
= 0; i
< 3; i
++) {
337 /* Check against selftest acceptance limits */
338 if ((results
[i
] < lis3
->pdata
->st_min_limits
[i
]) ||
339 (results
[i
] > lis3
->pdata
->st_max_limits
[i
])) {
348 mutex_unlock(&lis3
->mutex
);
353 * Order of registers in the list affects to order of the restore process.
354 * Perhaps it is a good idea to set interrupt enable register as a last one
355 * after all other configurations
357 static u8 lis3_wai8_regs
[] = { FF_WU_CFG_1
, FF_WU_THS_1
, FF_WU_DURATION_1
,
358 FF_WU_CFG_2
, FF_WU_THS_2
, FF_WU_DURATION_2
,
359 CLICK_CFG
, CLICK_SRC
, CLICK_THSY_X
, CLICK_THSZ
,
360 CLICK_TIMELIMIT
, CLICK_LATENCY
, CLICK_WINDOW
,
361 CTRL_REG1
, CTRL_REG2
, CTRL_REG3
};
363 static u8 lis3_wai12_regs
[] = {FF_WU_CFG
, FF_WU_THS_L
, FF_WU_THS_H
,
364 FF_WU_DURATION
, DD_CFG
, DD_THSI_L
, DD_THSI_H
,
365 DD_THSE_L
, DD_THSE_H
,
366 CTRL_REG1
, CTRL_REG3
, CTRL_REG2
};
368 static inline void lis3_context_save(struct lis3lv02d
*lis3
)
371 for (i
= 0; i
< lis3
->regs_size
; i
++)
372 lis3
->read(lis3
, lis3
->regs
[i
], &lis3
->reg_cache
[i
]);
373 lis3
->regs_stored
= true;
376 static inline void lis3_context_restore(struct lis3lv02d
*lis3
)
379 if (lis3
->regs_stored
)
380 for (i
= 0; i
< lis3
->regs_size
; i
++)
381 lis3
->write(lis3
, lis3
->regs
[i
], lis3
->reg_cache
[i
]);
384 void lis3lv02d_poweroff(struct lis3lv02d
*lis3
)
387 lis3_context_save(lis3
);
388 /* disable X,Y,Z axis and power down */
389 lis3
->write(lis3
, CTRL_REG1
, 0x00);
391 lis3
->reg_ctrl(lis3
, LIS3_REG_OFF
);
393 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff
);
395 int lis3lv02d_poweron(struct lis3lv02d
*lis3
)
403 * Common configuration
404 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
405 * both have been read. So the value read will always be correct.
406 * Set BOOT bit to refresh factory tuning values.
409 lis3
->read(lis3
, CTRL_REG2
, ®
);
410 if (lis3
->whoami
== WAI_12B
)
411 reg
|= CTRL2_BDU
| CTRL2_BOOT
;
412 else if (lis3
->whoami
== WAI_3DLH
)
413 reg
|= CTRL2_BOOT_3DLH
;
415 reg
|= CTRL2_BOOT_8B
;
416 lis3
->write(lis3
, CTRL_REG2
, reg
);
418 if (lis3
->whoami
== WAI_3DLH
) {
419 lis3
->read(lis3
, CTRL_REG4
, ®
);
421 lis3
->write(lis3
, CTRL_REG4
, reg
);
425 err
= lis3lv02d_get_pwron_wait(lis3
);
430 lis3_context_restore(lis3
);
434 EXPORT_SYMBOL_GPL(lis3lv02d_poweron
);
437 static void lis3lv02d_joystick_poll(struct input_polled_dev
*pidev
)
439 struct lis3lv02d
*lis3
= pidev
->private;
442 mutex_lock(&lis3
->mutex
);
443 lis3lv02d_get_xyz(lis3
, &x
, &y
, &z
);
444 input_report_abs(pidev
->input
, ABS_X
, x
);
445 input_report_abs(pidev
->input
, ABS_Y
, y
);
446 input_report_abs(pidev
->input
, ABS_Z
, z
);
447 input_sync(pidev
->input
);
448 mutex_unlock(&lis3
->mutex
);
451 static void lis3lv02d_joystick_open(struct input_polled_dev
*pidev
)
453 struct lis3lv02d
*lis3
= pidev
->private;
456 pm_runtime_get_sync(lis3
->pm_dev
);
458 if (lis3
->pdata
&& lis3
->whoami
== WAI_8B
&& lis3
->idev
)
459 atomic_set(&lis3
->wake_thread
, 1);
461 * Update coordinates for the case where poll interval is 0 and
462 * the chip in running purely under interrupt control
464 lis3lv02d_joystick_poll(pidev
);
467 static void lis3lv02d_joystick_close(struct input_polled_dev
*pidev
)
469 struct lis3lv02d
*lis3
= pidev
->private;
471 atomic_set(&lis3
->wake_thread
, 0);
473 pm_runtime_put(lis3
->pm_dev
);
476 static irqreturn_t
lis302dl_interrupt(int irq
, void *data
)
478 struct lis3lv02d
*lis3
= data
;
480 if (!test_bit(0, &lis3
->misc_opened
))
484 * Be careful: on some HP laptops the bios force DD when on battery and
485 * the lid is closed. This leads to interrupts as soon as a little move
488 atomic_inc(&lis3
->count
);
490 wake_up_interruptible(&lis3
->misc_wait
);
491 kill_fasync(&lis3
->async_queue
, SIGIO
, POLL_IN
);
493 if (atomic_read(&lis3
->wake_thread
))
494 return IRQ_WAKE_THREAD
;
498 static void lis302dl_interrupt_handle_click(struct lis3lv02d
*lis3
)
500 struct input_dev
*dev
= lis3
->idev
->input
;
503 mutex_lock(&lis3
->mutex
);
504 lis3
->read(lis3
, CLICK_SRC
, &click_src
);
506 if (click_src
& CLICK_SINGLE_X
) {
507 input_report_key(dev
, lis3
->mapped_btns
[0], 1);
508 input_report_key(dev
, lis3
->mapped_btns
[0], 0);
511 if (click_src
& CLICK_SINGLE_Y
) {
512 input_report_key(dev
, lis3
->mapped_btns
[1], 1);
513 input_report_key(dev
, lis3
->mapped_btns
[1], 0);
516 if (click_src
& CLICK_SINGLE_Z
) {
517 input_report_key(dev
, lis3
->mapped_btns
[2], 1);
518 input_report_key(dev
, lis3
->mapped_btns
[2], 0);
521 mutex_unlock(&lis3
->mutex
);
524 static inline void lis302dl_data_ready(struct lis3lv02d
*lis3
, int index
)
528 /* Dummy read to ack interrupt */
529 lis3lv02d_get_xyz(lis3
, &dummy
, &dummy
, &dummy
);
530 lis3
->data_ready_count
[index
]++;
533 static irqreturn_t
lis302dl_interrupt_thread1_8b(int irq
, void *data
)
535 struct lis3lv02d
*lis3
= data
;
536 u8 irq_cfg
= lis3
->irq_cfg
& LIS3_IRQ1_MASK
;
538 if (irq_cfg
== LIS3_IRQ1_CLICK
)
539 lis302dl_interrupt_handle_click(lis3
);
540 else if (unlikely(irq_cfg
== LIS3_IRQ1_DATA_READY
))
541 lis302dl_data_ready(lis3
, IRQ_LINE0
);
543 lis3lv02d_joystick_poll(lis3
->idev
);
548 static irqreturn_t
lis302dl_interrupt_thread2_8b(int irq
, void *data
)
550 struct lis3lv02d
*lis3
= data
;
551 u8 irq_cfg
= lis3
->irq_cfg
& LIS3_IRQ2_MASK
;
553 if (irq_cfg
== LIS3_IRQ2_CLICK
)
554 lis302dl_interrupt_handle_click(lis3
);
555 else if (unlikely(irq_cfg
== LIS3_IRQ2_DATA_READY
))
556 lis302dl_data_ready(lis3
, IRQ_LINE1
);
558 lis3lv02d_joystick_poll(lis3
->idev
);
563 static int lis3lv02d_misc_open(struct inode
*inode
, struct file
*file
)
565 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
566 struct lis3lv02d
, miscdev
);
568 if (test_and_set_bit(0, &lis3
->misc_opened
))
569 return -EBUSY
; /* already open */
572 pm_runtime_get_sync(lis3
->pm_dev
);
574 atomic_set(&lis3
->count
, 0);
578 static int lis3lv02d_misc_release(struct inode
*inode
, struct file
*file
)
580 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
581 struct lis3lv02d
, miscdev
);
583 clear_bit(0, &lis3
->misc_opened
); /* release the device */
585 pm_runtime_put(lis3
->pm_dev
);
589 static ssize_t
lis3lv02d_misc_read(struct file
*file
, char __user
*buf
,
590 size_t count
, loff_t
*pos
)
592 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
593 struct lis3lv02d
, miscdev
);
595 DECLARE_WAITQUEUE(wait
, current
);
597 unsigned char byte_data
;
603 add_wait_queue(&lis3
->misc_wait
, &wait
);
605 set_current_state(TASK_INTERRUPTIBLE
);
606 data
= atomic_xchg(&lis3
->count
, 0);
610 if (file
->f_flags
& O_NONBLOCK
) {
615 if (signal_pending(current
)) {
616 retval
= -ERESTARTSYS
;
628 /* make sure we are not going into copy_to_user() with
629 * TASK_INTERRUPTIBLE state */
630 set_current_state(TASK_RUNNING
);
631 if (copy_to_user(buf
, &byte_data
, sizeof(byte_data
)))
635 __set_current_state(TASK_RUNNING
);
636 remove_wait_queue(&lis3
->misc_wait
, &wait
);
641 static __poll_t
lis3lv02d_misc_poll(struct file
*file
, poll_table
*wait
)
643 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
644 struct lis3lv02d
, miscdev
);
646 poll_wait(file
, &lis3
->misc_wait
, wait
);
647 if (atomic_read(&lis3
->count
))
648 return EPOLLIN
| EPOLLRDNORM
;
652 static int lis3lv02d_misc_fasync(int fd
, struct file
*file
, int on
)
654 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
655 struct lis3lv02d
, miscdev
);
657 return fasync_helper(fd
, file
, on
, &lis3
->async_queue
);
660 static const struct file_operations lis3lv02d_misc_fops
= {
661 .owner
= THIS_MODULE
,
663 .read
= lis3lv02d_misc_read
,
664 .open
= lis3lv02d_misc_open
,
665 .release
= lis3lv02d_misc_release
,
666 .poll
= lis3lv02d_misc_poll
,
667 .fasync
= lis3lv02d_misc_fasync
,
670 int lis3lv02d_joystick_enable(struct lis3lv02d
*lis3
)
672 struct input_dev
*input_dev
;
674 int max_val
, fuzz
, flat
;
675 int btns
[] = {BTN_X
, BTN_Y
, BTN_Z
};
680 lis3
->idev
= input_allocate_polled_device();
684 lis3
->idev
->poll
= lis3lv02d_joystick_poll
;
685 lis3
->idev
->open
= lis3lv02d_joystick_open
;
686 lis3
->idev
->close
= lis3lv02d_joystick_close
;
687 lis3
->idev
->poll_interval
= MDPS_POLL_INTERVAL
;
688 lis3
->idev
->poll_interval_min
= MDPS_POLL_MIN
;
689 lis3
->idev
->poll_interval_max
= MDPS_POLL_MAX
;
690 lis3
->idev
->private = lis3
;
691 input_dev
= lis3
->idev
->input
;
693 input_dev
->name
= "ST LIS3LV02DL Accelerometer";
694 input_dev
->phys
= DRIVER_NAME
"/input0";
695 input_dev
->id
.bustype
= BUS_HOST
;
696 input_dev
->id
.vendor
= 0;
697 input_dev
->dev
.parent
= &lis3
->pdev
->dev
;
699 set_bit(EV_ABS
, input_dev
->evbit
);
700 max_val
= (lis3
->mdps_max_val
* lis3
->scale
) / LIS3_ACCURACY
;
701 if (lis3
->whoami
== WAI_12B
) {
702 fuzz
= LIS3_DEFAULT_FUZZ_12B
;
703 flat
= LIS3_DEFAULT_FLAT_12B
;
705 fuzz
= LIS3_DEFAULT_FUZZ_8B
;
706 flat
= LIS3_DEFAULT_FLAT_8B
;
708 fuzz
= (fuzz
* lis3
->scale
) / LIS3_ACCURACY
;
709 flat
= (flat
* lis3
->scale
) / LIS3_ACCURACY
;
711 input_set_abs_params(input_dev
, ABS_X
, -max_val
, max_val
, fuzz
, flat
);
712 input_set_abs_params(input_dev
, ABS_Y
, -max_val
, max_val
, fuzz
, flat
);
713 input_set_abs_params(input_dev
, ABS_Z
, -max_val
, max_val
, fuzz
, flat
);
715 lis3
->mapped_btns
[0] = lis3lv02d_get_axis(abs(lis3
->ac
.x
), btns
);
716 lis3
->mapped_btns
[1] = lis3lv02d_get_axis(abs(lis3
->ac
.y
), btns
);
717 lis3
->mapped_btns
[2] = lis3lv02d_get_axis(abs(lis3
->ac
.z
), btns
);
719 err
= input_register_polled_device(lis3
->idev
);
721 input_free_polled_device(lis3
->idev
);
727 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable
);
729 void lis3lv02d_joystick_disable(struct lis3lv02d
*lis3
)
732 free_irq(lis3
->irq
, lis3
);
733 if (lis3
->pdata
&& lis3
->pdata
->irq2
)
734 free_irq(lis3
->pdata
->irq2
, lis3
);
740 misc_deregister(&lis3
->miscdev
);
741 input_unregister_polled_device(lis3
->idev
);
742 input_free_polled_device(lis3
->idev
);
745 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable
);
748 static void lis3lv02d_sysfs_poweron(struct lis3lv02d
*lis3
)
751 * SYSFS functions are fast visitors so put-call
752 * immediately after the get-call. However, keep
753 * chip running for a while and schedule delayed
754 * suspend. This way periodic sysfs calls doesn't
755 * suffer from relatively long power up time.
759 pm_runtime_get_sync(lis3
->pm_dev
);
760 pm_runtime_put_noidle(lis3
->pm_dev
);
761 pm_schedule_suspend(lis3
->pm_dev
, LIS3_SYSFS_POWERDOWN_DELAY
);
765 static ssize_t
lis3lv02d_selftest_show(struct device
*dev
,
766 struct device_attribute
*attr
, char *buf
)
768 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
771 static const char ok
[] = "OK";
772 static const char fail
[] = "FAIL";
773 static const char irq
[] = "FAIL_IRQ";
776 lis3lv02d_sysfs_poweron(lis3
);
777 switch (lis3lv02d_selftest(lis3
, values
)) {
789 return sprintf(buf
, "%s %d %d %d\n", res
,
790 values
[0], values
[1], values
[2]);
793 static ssize_t
lis3lv02d_position_show(struct device
*dev
,
794 struct device_attribute
*attr
, char *buf
)
796 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
799 lis3lv02d_sysfs_poweron(lis3
);
800 mutex_lock(&lis3
->mutex
);
801 lis3lv02d_get_xyz(lis3
, &x
, &y
, &z
);
802 mutex_unlock(&lis3
->mutex
);
803 return sprintf(buf
, "(%d,%d,%d)\n", x
, y
, z
);
806 static ssize_t
lis3lv02d_rate_show(struct device
*dev
,
807 struct device_attribute
*attr
, char *buf
)
809 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
811 lis3lv02d_sysfs_poweron(lis3
);
812 return sprintf(buf
, "%d\n", lis3lv02d_get_odr(lis3
));
815 static ssize_t
lis3lv02d_rate_set(struct device
*dev
,
816 struct device_attribute
*attr
, const char *buf
,
819 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
823 ret
= kstrtoul(buf
, 0, &rate
);
827 lis3lv02d_sysfs_poweron(lis3
);
828 if (lis3lv02d_set_odr(lis3
, rate
))
834 static DEVICE_ATTR(selftest
, S_IRUSR
, lis3lv02d_selftest_show
, NULL
);
835 static DEVICE_ATTR(position
, S_IRUGO
, lis3lv02d_position_show
, NULL
);
836 static DEVICE_ATTR(rate
, S_IRUGO
| S_IWUSR
, lis3lv02d_rate_show
,
839 static struct attribute
*lis3lv02d_attributes
[] = {
840 &dev_attr_selftest
.attr
,
841 &dev_attr_position
.attr
,
846 static const struct attribute_group lis3lv02d_attribute_group
= {
847 .attrs
= lis3lv02d_attributes
851 static int lis3lv02d_add_fs(struct lis3lv02d
*lis3
)
853 lis3
->pdev
= platform_device_register_simple(DRIVER_NAME
, -1, NULL
, 0);
854 if (IS_ERR(lis3
->pdev
))
855 return PTR_ERR(lis3
->pdev
);
857 platform_set_drvdata(lis3
->pdev
, lis3
);
858 return sysfs_create_group(&lis3
->pdev
->dev
.kobj
, &lis3lv02d_attribute_group
);
861 int lis3lv02d_remove_fs(struct lis3lv02d
*lis3
)
863 sysfs_remove_group(&lis3
->pdev
->dev
.kobj
, &lis3lv02d_attribute_group
);
864 platform_device_unregister(lis3
->pdev
);
866 /* Barrier after the sysfs remove */
867 pm_runtime_barrier(lis3
->pm_dev
);
869 /* SYSFS may have left chip running. Turn off if necessary */
870 if (!pm_runtime_suspended(lis3
->pm_dev
))
871 lis3lv02d_poweroff(lis3
);
873 pm_runtime_disable(lis3
->pm_dev
);
874 pm_runtime_set_suspended(lis3
->pm_dev
);
876 kfree(lis3
->reg_cache
);
879 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs
);
881 static void lis3lv02d_8b_configure(struct lis3lv02d
*lis3
,
882 struct lis3lv02d_platform_data
*p
)
885 int ctrl2
= p
->hipass_ctrl
;
887 if (p
->click_flags
) {
888 lis3
->write(lis3
, CLICK_CFG
, p
->click_flags
);
889 lis3
->write(lis3
, CLICK_TIMELIMIT
, p
->click_time_limit
);
890 lis3
->write(lis3
, CLICK_LATENCY
, p
->click_latency
);
891 lis3
->write(lis3
, CLICK_WINDOW
, p
->click_window
);
892 lis3
->write(lis3
, CLICK_THSZ
, p
->click_thresh_z
& 0xf);
893 lis3
->write(lis3
, CLICK_THSY_X
,
894 (p
->click_thresh_x
& 0xf) |
895 (p
->click_thresh_y
<< 4));
898 struct input_dev
*input_dev
= lis3
->idev
->input
;
899 input_set_capability(input_dev
, EV_KEY
, BTN_X
);
900 input_set_capability(input_dev
, EV_KEY
, BTN_Y
);
901 input_set_capability(input_dev
, EV_KEY
, BTN_Z
);
905 if (p
->wakeup_flags
) {
906 lis3
->write(lis3
, FF_WU_CFG_1
, p
->wakeup_flags
);
907 lis3
->write(lis3
, FF_WU_THS_1
, p
->wakeup_thresh
& 0x7f);
908 /* pdata value + 1 to keep this backward compatible*/
909 lis3
->write(lis3
, FF_WU_DURATION_1
, p
->duration1
+ 1);
910 ctrl2
^= HP_FF_WU1
; /* Xor to keep compatible with old pdata*/
913 if (p
->wakeup_flags2
) {
914 lis3
->write(lis3
, FF_WU_CFG_2
, p
->wakeup_flags2
);
915 lis3
->write(lis3
, FF_WU_THS_2
, p
->wakeup_thresh2
& 0x7f);
916 /* pdata value + 1 to keep this backward compatible*/
917 lis3
->write(lis3
, FF_WU_DURATION_2
, p
->duration2
+ 1);
918 ctrl2
^= HP_FF_WU2
; /* Xor to keep compatible with old pdata*/
920 /* Configure hipass filters */
921 lis3
->write(lis3
, CTRL_REG2
, ctrl2
);
924 err
= request_threaded_irq(p
->irq2
,
926 lis302dl_interrupt_thread2_8b
,
927 IRQF_TRIGGER_RISING
| IRQF_ONESHOT
|
928 (p
->irq_flags2
& IRQF_TRIGGER_MASK
),
931 pr_err("No second IRQ. Limited functionality\n");
936 int lis3lv02d_init_dt(struct lis3lv02d
*lis3
)
938 struct lis3lv02d_platform_data
*pdata
;
939 struct device_node
*np
= lis3
->of_node
;
946 pdata
= kzalloc(sizeof(*pdata
), GFP_KERNEL
);
950 if (of_get_property(np
, "st,click-single-x", NULL
))
951 pdata
->click_flags
|= LIS3_CLICK_SINGLE_X
;
952 if (of_get_property(np
, "st,click-double-x", NULL
))
953 pdata
->click_flags
|= LIS3_CLICK_DOUBLE_X
;
955 if (of_get_property(np
, "st,click-single-y", NULL
))
956 pdata
->click_flags
|= LIS3_CLICK_SINGLE_Y
;
957 if (of_get_property(np
, "st,click-double-y", NULL
))
958 pdata
->click_flags
|= LIS3_CLICK_DOUBLE_Y
;
960 if (of_get_property(np
, "st,click-single-z", NULL
))
961 pdata
->click_flags
|= LIS3_CLICK_SINGLE_Z
;
962 if (of_get_property(np
, "st,click-double-z", NULL
))
963 pdata
->click_flags
|= LIS3_CLICK_DOUBLE_Z
;
965 if (!of_property_read_u32(np
, "st,click-threshold-x", &val
))
966 pdata
->click_thresh_x
= val
;
967 if (!of_property_read_u32(np
, "st,click-threshold-y", &val
))
968 pdata
->click_thresh_y
= val
;
969 if (!of_property_read_u32(np
, "st,click-threshold-z", &val
))
970 pdata
->click_thresh_z
= val
;
972 if (!of_property_read_u32(np
, "st,click-time-limit", &val
))
973 pdata
->click_time_limit
= val
;
974 if (!of_property_read_u32(np
, "st,click-latency", &val
))
975 pdata
->click_latency
= val
;
976 if (!of_property_read_u32(np
, "st,click-window", &val
))
977 pdata
->click_window
= val
;
979 if (of_get_property(np
, "st,irq1-disable", NULL
))
980 pdata
->irq_cfg
|= LIS3_IRQ1_DISABLE
;
981 if (of_get_property(np
, "st,irq1-ff-wu-1", NULL
))
982 pdata
->irq_cfg
|= LIS3_IRQ1_FF_WU_1
;
983 if (of_get_property(np
, "st,irq1-ff-wu-2", NULL
))
984 pdata
->irq_cfg
|= LIS3_IRQ1_FF_WU_2
;
985 if (of_get_property(np
, "st,irq1-data-ready", NULL
))
986 pdata
->irq_cfg
|= LIS3_IRQ1_DATA_READY
;
987 if (of_get_property(np
, "st,irq1-click", NULL
))
988 pdata
->irq_cfg
|= LIS3_IRQ1_CLICK
;
990 if (of_get_property(np
, "st,irq2-disable", NULL
))
991 pdata
->irq_cfg
|= LIS3_IRQ2_DISABLE
;
992 if (of_get_property(np
, "st,irq2-ff-wu-1", NULL
))
993 pdata
->irq_cfg
|= LIS3_IRQ2_FF_WU_1
;
994 if (of_get_property(np
, "st,irq2-ff-wu-2", NULL
))
995 pdata
->irq_cfg
|= LIS3_IRQ2_FF_WU_2
;
996 if (of_get_property(np
, "st,irq2-data-ready", NULL
))
997 pdata
->irq_cfg
|= LIS3_IRQ2_DATA_READY
;
998 if (of_get_property(np
, "st,irq2-click", NULL
))
999 pdata
->irq_cfg
|= LIS3_IRQ2_CLICK
;
1001 if (of_get_property(np
, "st,irq-open-drain", NULL
))
1002 pdata
->irq_cfg
|= LIS3_IRQ_OPEN_DRAIN
;
1003 if (of_get_property(np
, "st,irq-active-low", NULL
))
1004 pdata
->irq_cfg
|= LIS3_IRQ_ACTIVE_LOW
;
1006 if (!of_property_read_u32(np
, "st,wu-duration-1", &val
))
1007 pdata
->duration1
= val
;
1008 if (!of_property_read_u32(np
, "st,wu-duration-2", &val
))
1009 pdata
->duration2
= val
;
1011 if (of_get_property(np
, "st,wakeup-x-lo", NULL
))
1012 pdata
->wakeup_flags
|= LIS3_WAKEUP_X_LO
;
1013 if (of_get_property(np
, "st,wakeup-x-hi", NULL
))
1014 pdata
->wakeup_flags
|= LIS3_WAKEUP_X_HI
;
1015 if (of_get_property(np
, "st,wakeup-y-lo", NULL
))
1016 pdata
->wakeup_flags
|= LIS3_WAKEUP_Y_LO
;
1017 if (of_get_property(np
, "st,wakeup-y-hi", NULL
))
1018 pdata
->wakeup_flags
|= LIS3_WAKEUP_Y_HI
;
1019 if (of_get_property(np
, "st,wakeup-z-lo", NULL
))
1020 pdata
->wakeup_flags
|= LIS3_WAKEUP_Z_LO
;
1021 if (of_get_property(np
, "st,wakeup-z-hi", NULL
))
1022 pdata
->wakeup_flags
|= LIS3_WAKEUP_Z_HI
;
1023 if (of_get_property(np
, "st,wakeup-threshold", &val
))
1024 pdata
->wakeup_thresh
= val
;
1026 if (of_get_property(np
, "st,wakeup2-x-lo", NULL
))
1027 pdata
->wakeup_flags2
|= LIS3_WAKEUP_X_LO
;
1028 if (of_get_property(np
, "st,wakeup2-x-hi", NULL
))
1029 pdata
->wakeup_flags2
|= LIS3_WAKEUP_X_HI
;
1030 if (of_get_property(np
, "st,wakeup2-y-lo", NULL
))
1031 pdata
->wakeup_flags2
|= LIS3_WAKEUP_Y_LO
;
1032 if (of_get_property(np
, "st,wakeup2-y-hi", NULL
))
1033 pdata
->wakeup_flags2
|= LIS3_WAKEUP_Y_HI
;
1034 if (of_get_property(np
, "st,wakeup2-z-lo", NULL
))
1035 pdata
->wakeup_flags2
|= LIS3_WAKEUP_Z_LO
;
1036 if (of_get_property(np
, "st,wakeup2-z-hi", NULL
))
1037 pdata
->wakeup_flags2
|= LIS3_WAKEUP_Z_HI
;
1038 if (of_get_property(np
, "st,wakeup2-threshold", &val
))
1039 pdata
->wakeup_thresh2
= val
;
1041 if (!of_property_read_u32(np
, "st,highpass-cutoff-hz", &val
)) {
1044 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_1HZ
;
1047 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_2HZ
;
1050 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_4HZ
;
1053 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_8HZ
;
1058 if (of_get_property(np
, "st,hipass1-disable", NULL
))
1059 pdata
->hipass_ctrl
|= LIS3_HIPASS1_DISABLE
;
1060 if (of_get_property(np
, "st,hipass2-disable", NULL
))
1061 pdata
->hipass_ctrl
|= LIS3_HIPASS2_DISABLE
;
1063 if (of_property_read_s32(np
, "st,axis-x", &sval
) == 0)
1064 pdata
->axis_x
= sval
;
1065 if (of_property_read_s32(np
, "st,axis-y", &sval
) == 0)
1066 pdata
->axis_y
= sval
;
1067 if (of_property_read_s32(np
, "st,axis-z", &sval
) == 0)
1068 pdata
->axis_z
= sval
;
1070 if (of_get_property(np
, "st,default-rate", NULL
))
1071 pdata
->default_rate
= val
;
1073 if (of_property_read_s32(np
, "st,min-limit-x", &sval
) == 0)
1074 pdata
->st_min_limits
[0] = sval
;
1075 if (of_property_read_s32(np
, "st,min-limit-y", &sval
) == 0)
1076 pdata
->st_min_limits
[1] = sval
;
1077 if (of_property_read_s32(np
, "st,min-limit-z", &sval
) == 0)
1078 pdata
->st_min_limits
[2] = sval
;
1080 if (of_property_read_s32(np
, "st,max-limit-x", &sval
) == 0)
1081 pdata
->st_max_limits
[0] = sval
;
1082 if (of_property_read_s32(np
, "st,max-limit-y", &sval
) == 0)
1083 pdata
->st_max_limits
[1] = sval
;
1084 if (of_property_read_s32(np
, "st,max-limit-z", &sval
) == 0)
1085 pdata
->st_max_limits
[2] = sval
;
1088 lis3
->pdata
= pdata
;
1094 int lis3lv02d_init_dt(struct lis3lv02d
*lis3
)
1099 EXPORT_SYMBOL_GPL(lis3lv02d_init_dt
);
1102 * Initialise the accelerometer and the various subsystems.
1103 * Should be rather independent of the bus system.
1105 int lis3lv02d_init_device(struct lis3lv02d
*lis3
)
1108 irq_handler_t thread_fn
;
1111 lis3
->whoami
= lis3lv02d_read_8(lis3
, WHO_AM_I
);
1113 switch (lis3
->whoami
) {
1115 pr_info("12 bits sensor found\n");
1116 lis3
->read_data
= lis3lv02d_read_12
;
1117 lis3
->mdps_max_val
= 2048;
1118 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_12B
;
1119 lis3
->odrs
= lis3_12_rates
;
1120 lis3
->odr_mask
= CTRL1_DF0
| CTRL1_DF1
;
1121 lis3
->scale
= LIS3_SENSITIVITY_12B
;
1122 lis3
->regs
= lis3_wai12_regs
;
1123 lis3
->regs_size
= ARRAY_SIZE(lis3_wai12_regs
);
1126 pr_info("8 bits sensor found\n");
1127 lis3
->read_data
= lis3lv02d_read_8
;
1128 lis3
->mdps_max_val
= 128;
1129 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
1130 lis3
->odrs
= lis3_8_rates
;
1131 lis3
->odr_mask
= CTRL1_DR
;
1132 lis3
->scale
= LIS3_SENSITIVITY_8B
;
1133 lis3
->regs
= lis3_wai8_regs
;
1134 lis3
->regs_size
= ARRAY_SIZE(lis3_wai8_regs
);
1137 pr_info("8 bits 3DC sensor found\n");
1138 lis3
->read_data
= lis3lv02d_read_8
;
1139 lis3
->mdps_max_val
= 128;
1140 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
1141 lis3
->odrs
= lis3_3dc_rates
;
1142 lis3
->odr_mask
= CTRL1_ODR0
|CTRL1_ODR1
|CTRL1_ODR2
|CTRL1_ODR3
;
1143 lis3
->scale
= LIS3_SENSITIVITY_8B
;
1146 pr_info("16 bits lis331dlh sensor found\n");
1147 lis3
->read_data
= lis331dlh_read_data
;
1148 lis3
->mdps_max_val
= 2048; /* 12 bits for 2G */
1149 lis3
->shift_adj
= SHIFT_ADJ_2G
;
1150 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
1151 lis3
->odrs
= lis3_3dlh_rates
;
1152 lis3
->odr_mask
= CTRL1_DR0
| CTRL1_DR1
;
1153 lis3
->scale
= LIS3DLH_SENSITIVITY_2G
;
1156 pr_err("unknown sensor type 0x%X\n", lis3
->whoami
);
1160 lis3
->reg_cache
= kzalloc(max(sizeof(lis3_wai8_regs
),
1161 sizeof(lis3_wai12_regs
)), GFP_KERNEL
);
1163 if (lis3
->reg_cache
== NULL
) {
1164 printk(KERN_ERR DRIVER_NAME
"out of memory\n");
1168 mutex_init(&lis3
->mutex
);
1169 atomic_set(&lis3
->wake_thread
, 0);
1171 lis3lv02d_add_fs(lis3
);
1172 err
= lis3lv02d_poweron(lis3
);
1174 lis3lv02d_remove_fs(lis3
);
1179 pm_runtime_set_active(lis3
->pm_dev
);
1180 pm_runtime_enable(lis3
->pm_dev
);
1183 if (lis3lv02d_joystick_enable(lis3
))
1184 pr_err("joystick initialization failed\n");
1186 /* passing in platform specific data is purely optional and only
1187 * used by the SPI transport layer at the moment */
1189 struct lis3lv02d_platform_data
*p
= lis3
->pdata
;
1191 if (lis3
->whoami
== WAI_8B
)
1192 lis3lv02d_8b_configure(lis3
, p
);
1194 irq_flags
= p
->irq_flags1
& IRQF_TRIGGER_MASK
;
1196 lis3
->irq_cfg
= p
->irq_cfg
;
1198 lis3
->write(lis3
, CTRL_REG3
, p
->irq_cfg
);
1200 if (p
->default_rate
)
1201 lis3lv02d_set_odr(lis3
, p
->default_rate
);
1204 /* bail if we did not get an IRQ from the bus layer */
1206 pr_debug("No IRQ. Disabling /dev/freefall\n");
1211 * The sensor can generate interrupts for free-fall and direction
1212 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
1213 * the things simple and _fast_ we activate it only for free-fall, so
1214 * no need to read register (very slow with ACPI). For the same reason,
1215 * we forbid shared interrupts.
1217 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
1218 * io-apic is not configurable (and generates a warning) but I keep it
1219 * in case of support for other hardware.
1221 if (lis3
->pdata
&& lis3
->whoami
== WAI_8B
)
1222 thread_fn
= lis302dl_interrupt_thread1_8b
;
1226 err
= request_threaded_irq(lis3
->irq
, lis302dl_interrupt
,
1228 IRQF_TRIGGER_RISING
| IRQF_ONESHOT
|
1233 pr_err("Cannot get IRQ\n");
1237 lis3
->miscdev
.minor
= MISC_DYNAMIC_MINOR
;
1238 lis3
->miscdev
.name
= "freefall";
1239 lis3
->miscdev
.fops
= &lis3lv02d_misc_fops
;
1241 if (misc_register(&lis3
->miscdev
))
1242 pr_err("misc_register failed\n");
1246 EXPORT_SYMBOL_GPL(lis3lv02d_init_device
);
1248 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1249 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1250 MODULE_LICENSE("GPL");