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/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 <linux/of_device.h>
43 #include "lis3lv02d.h"
45 #define DRIVER_NAME "lis3lv02d"
47 /* joystick device poll interval in milliseconds */
48 #define MDPS_POLL_INTERVAL 50
49 #define MDPS_POLL_MIN 0
50 #define MDPS_POLL_MAX 2000
52 #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
55 #define SELFTEST_FAIL -1
56 #define SELFTEST_IRQ -2
62 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
63 * because they are generated even if the data do not change. So it's better
64 * to keep the interrupt for the free-fall event. The values are updated at
65 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
66 * some low processor, we poll the sensor only at 20Hz... enough for the
70 #define LIS3_PWRON_DELAY_WAI_12B (5000)
71 #define LIS3_PWRON_DELAY_WAI_8B (3000)
74 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
75 * LIS302D spec says: 18 mG / digit
76 * LIS3_ACCURACY is used to increase accuracy of the intermediate
77 * calculation results.
79 #define LIS3_ACCURACY 1024
80 /* Sensitivity values for -2G +2G scale */
81 #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
82 #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
85 * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG.
86 * Below macros defines sensitivity values for +/-2G. Dataout bits for
87 * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit
88 * data from 16bit value. Currently this driver supports only 2G range.
90 #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
91 #define SHIFT_ADJ_2G 4
93 #define LIS3_DEFAULT_FUZZ_12B 3
94 #define LIS3_DEFAULT_FLAT_12B 3
95 #define LIS3_DEFAULT_FUZZ_8B 1
96 #define LIS3_DEFAULT_FLAT_8B 1
98 struct lis3lv02d lis3_dev
= {
99 .misc_wait
= __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev
.misc_wait
),
101 EXPORT_SYMBOL_GPL(lis3_dev
);
103 /* just like param_set_int() but does sanity-check so that it won't point
104 * over the axis array size
106 static int param_set_axis(const char *val
, const struct kernel_param
*kp
)
108 int ret
= param_set_int(val
, kp
);
110 int val
= *(int *)kp
->arg
;
119 static struct kernel_param_ops param_ops_axis
= {
120 .set
= param_set_axis
,
121 .get
= param_get_int
,
124 #define param_check_axis(name, p) param_check_int(name, p)
126 module_param_array_named(axes
, lis3_dev
.ac
.as_array
, axis
, NULL
, 0644);
127 MODULE_PARM_DESC(axes
, "Axis-mapping for x,y,z directions");
129 static s16
lis3lv02d_read_8(struct lis3lv02d
*lis3
, int reg
)
132 if (lis3
->read(lis3
, reg
, &lo
) < 0)
138 static s16
lis3lv02d_read_12(struct lis3lv02d
*lis3
, int reg
)
142 lis3
->read(lis3
, reg
- 1, &lo
);
143 lis3
->read(lis3
, reg
, &hi
);
144 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
145 return (s16
)((hi
<< 8) | lo
);
148 /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */
149 static s16
lis331dlh_read_data(struct lis3lv02d
*lis3
, int reg
)
154 lis3
->read(lis3
, reg
- 1, &lo
);
155 lis3
->read(lis3
, reg
, &hi
);
156 v
= (int) ((hi
<< 8) | lo
);
158 return (s16
) v
>> lis3
->shift_adj
;
162 * lis3lv02d_get_axis - For the given axis, give the value converted
163 * @axis: 1,2,3 - can also be negative
164 * @hw_values: raw values returned by the hardware
166 * Returns the converted value.
168 static inline int lis3lv02d_get_axis(s8 axis
, int hw_values
[3])
171 return hw_values
[axis
- 1];
173 return -hw_values
[-axis
- 1];
177 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
178 * @lis3: pointer to the device struct
179 * @x: where to store the X axis value
180 * @y: where to store the Y axis value
181 * @z: where to store the Z axis value
183 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
185 static void lis3lv02d_get_xyz(struct lis3lv02d
*lis3
, int *x
, int *y
, int *z
)
191 if (lis3
->whoami
== WAI_12B
) {
193 lis3
->blkread(lis3
, OUTX_L
, 6, (u8
*)data
);
194 for (i
= 0; i
< 3; i
++)
195 position
[i
] = (s16
)le16_to_cpu(data
[i
]);
198 /* Data: x, dummy, y, dummy, z */
199 lis3
->blkread(lis3
, OUTX
, 5, data
);
200 for (i
= 0; i
< 3; i
++)
201 position
[i
] = (s8
)data
[i
* 2];
204 position
[0] = lis3
->read_data(lis3
, OUTX
);
205 position
[1] = lis3
->read_data(lis3
, OUTY
);
206 position
[2] = lis3
->read_data(lis3
, OUTZ
);
209 for (i
= 0; i
< 3; i
++)
210 position
[i
] = (position
[i
] * lis3
->scale
) / LIS3_ACCURACY
;
212 *x
= lis3lv02d_get_axis(lis3
->ac
.x
, position
);
213 *y
= lis3lv02d_get_axis(lis3
->ac
.y
, position
);
214 *z
= lis3lv02d_get_axis(lis3
->ac
.z
, position
);
217 /* conversion btw sampling rate and the register values */
218 static int lis3_12_rates
[4] = {40, 160, 640, 2560};
219 static int lis3_8_rates
[2] = {100, 400};
220 static int lis3_3dc_rates
[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
221 static int lis3_3dlh_rates
[4] = {50, 100, 400, 1000};
223 /* ODR is Output Data Rate */
224 static int lis3lv02d_get_odr(struct lis3lv02d
*lis3
)
229 lis3
->read(lis3
, CTRL_REG1
, &ctrl
);
230 ctrl
&= lis3
->odr_mask
;
231 shift
= ffs(lis3
->odr_mask
) - 1;
232 return lis3
->odrs
[(ctrl
>> shift
)];
235 static int lis3lv02d_get_pwron_wait(struct lis3lv02d
*lis3
)
237 int div
= lis3lv02d_get_odr(lis3
);
239 if (WARN_ONCE(div
== 0, "device returned spurious data"))
242 /* LIS3 power on delay is quite long */
243 msleep(lis3
->pwron_delay
/ div
);
247 static int lis3lv02d_set_odr(struct lis3lv02d
*lis3
, int rate
)
255 lis3
->read(lis3
, CTRL_REG1
, &ctrl
);
256 ctrl
&= ~lis3
->odr_mask
;
257 len
= 1 << hweight_long(lis3
->odr_mask
); /* # of possible values */
258 shift
= ffs(lis3
->odr_mask
) - 1;
260 for (i
= 0; i
< len
; i
++)
261 if (lis3
->odrs
[i
] == rate
) {
262 lis3
->write(lis3
, CTRL_REG1
,
263 ctrl
| (i
<< shift
));
269 static int lis3lv02d_selftest(struct lis3lv02d
*lis3
, s16 results
[3])
276 unsigned char irq_cfg
;
278 mutex_lock(&lis3
->mutex
);
280 irq_cfg
= lis3
->irq_cfg
;
281 if (lis3
->whoami
== WAI_8B
) {
282 lis3
->data_ready_count
[IRQ_LINE0
] = 0;
283 lis3
->data_ready_count
[IRQ_LINE1
] = 0;
285 /* Change interrupt cfg to data ready for selftest */
286 atomic_inc(&lis3
->wake_thread
);
287 lis3
->irq_cfg
= LIS3_IRQ1_DATA_READY
| LIS3_IRQ2_DATA_READY
;
288 lis3
->read(lis3
, CTRL_REG3
, &ctrl_reg_data
);
289 lis3
->write(lis3
, CTRL_REG3
, (ctrl_reg_data
&
290 ~(LIS3_IRQ1_MASK
| LIS3_IRQ2_MASK
)) |
291 (LIS3_IRQ1_DATA_READY
| LIS3_IRQ2_DATA_READY
));
294 if ((lis3
->whoami
== WAI_3DC
) || (lis3
->whoami
== WAI_3DLH
)) {
296 selftest
= CTRL4_ST0
;
299 if (lis3
->whoami
== WAI_12B
)
302 selftest
= CTRL1_STP
;
305 lis3
->read(lis3
, ctlreg
, ®
);
306 lis3
->write(lis3
, ctlreg
, (reg
| selftest
));
307 ret
= lis3lv02d_get_pwron_wait(lis3
);
311 /* Read directly to avoid axis remap */
312 x
= lis3
->read_data(lis3
, OUTX
);
313 y
= lis3
->read_data(lis3
, OUTY
);
314 z
= lis3
->read_data(lis3
, OUTZ
);
316 /* back to normal settings */
317 lis3
->write(lis3
, ctlreg
, reg
);
318 ret
= lis3lv02d_get_pwron_wait(lis3
);
322 results
[0] = x
- lis3
->read_data(lis3
, OUTX
);
323 results
[1] = y
- lis3
->read_data(lis3
, OUTY
);
324 results
[2] = z
- lis3
->read_data(lis3
, OUTZ
);
328 if (lis3
->whoami
== WAI_8B
) {
329 /* Restore original interrupt configuration */
330 atomic_dec(&lis3
->wake_thread
);
331 lis3
->write(lis3
, CTRL_REG3
, ctrl_reg_data
);
332 lis3
->irq_cfg
= irq_cfg
;
334 if ((irq_cfg
& LIS3_IRQ1_MASK
) &&
335 lis3
->data_ready_count
[IRQ_LINE0
] < 2) {
340 if ((irq_cfg
& LIS3_IRQ2_MASK
) &&
341 lis3
->data_ready_count
[IRQ_LINE1
] < 2) {
349 for (i
= 0; i
< 3; i
++) {
350 /* Check against selftest acceptance limits */
351 if ((results
[i
] < lis3
->pdata
->st_min_limits
[i
]) ||
352 (results
[i
] > lis3
->pdata
->st_max_limits
[i
])) {
361 mutex_unlock(&lis3
->mutex
);
366 * Order of registers in the list affects to order of the restore process.
367 * Perhaps it is a good idea to set interrupt enable register as a last one
368 * after all other configurations
370 static u8 lis3_wai8_regs
[] = { FF_WU_CFG_1
, FF_WU_THS_1
, FF_WU_DURATION_1
,
371 FF_WU_CFG_2
, FF_WU_THS_2
, FF_WU_DURATION_2
,
372 CLICK_CFG
, CLICK_SRC
, CLICK_THSY_X
, CLICK_THSZ
,
373 CLICK_TIMELIMIT
, CLICK_LATENCY
, CLICK_WINDOW
,
374 CTRL_REG1
, CTRL_REG2
, CTRL_REG3
};
376 static u8 lis3_wai12_regs
[] = {FF_WU_CFG
, FF_WU_THS_L
, FF_WU_THS_H
,
377 FF_WU_DURATION
, DD_CFG
, DD_THSI_L
, DD_THSI_H
,
378 DD_THSE_L
, DD_THSE_H
,
379 CTRL_REG1
, CTRL_REG3
, CTRL_REG2
};
381 static inline void lis3_context_save(struct lis3lv02d
*lis3
)
384 for (i
= 0; i
< lis3
->regs_size
; i
++)
385 lis3
->read(lis3
, lis3
->regs
[i
], &lis3
->reg_cache
[i
]);
386 lis3
->regs_stored
= true;
389 static inline void lis3_context_restore(struct lis3lv02d
*lis3
)
392 if (lis3
->regs_stored
)
393 for (i
= 0; i
< lis3
->regs_size
; i
++)
394 lis3
->write(lis3
, lis3
->regs
[i
], lis3
->reg_cache
[i
]);
397 void lis3lv02d_poweroff(struct lis3lv02d
*lis3
)
400 lis3_context_save(lis3
);
401 /* disable X,Y,Z axis and power down */
402 lis3
->write(lis3
, CTRL_REG1
, 0x00);
404 lis3
->reg_ctrl(lis3
, LIS3_REG_OFF
);
406 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff
);
408 int lis3lv02d_poweron(struct lis3lv02d
*lis3
)
416 * Common configuration
417 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
418 * both have been read. So the value read will always be correct.
419 * Set BOOT bit to refresh factory tuning values.
422 lis3
->read(lis3
, CTRL_REG2
, ®
);
423 if (lis3
->whoami
== WAI_12B
)
424 reg
|= CTRL2_BDU
| CTRL2_BOOT
;
425 else if (lis3
->whoami
== WAI_3DLH
)
426 reg
|= CTRL2_BOOT_3DLH
;
428 reg
|= CTRL2_BOOT_8B
;
429 lis3
->write(lis3
, CTRL_REG2
, reg
);
431 if (lis3
->whoami
== WAI_3DLH
) {
432 lis3
->read(lis3
, CTRL_REG4
, ®
);
434 lis3
->write(lis3
, CTRL_REG4
, reg
);
438 err
= lis3lv02d_get_pwron_wait(lis3
);
443 lis3_context_restore(lis3
);
447 EXPORT_SYMBOL_GPL(lis3lv02d_poweron
);
450 static void lis3lv02d_joystick_poll(struct input_polled_dev
*pidev
)
452 struct lis3lv02d
*lis3
= pidev
->private;
455 mutex_lock(&lis3
->mutex
);
456 lis3lv02d_get_xyz(lis3
, &x
, &y
, &z
);
457 input_report_abs(pidev
->input
, ABS_X
, x
);
458 input_report_abs(pidev
->input
, ABS_Y
, y
);
459 input_report_abs(pidev
->input
, ABS_Z
, z
);
460 input_sync(pidev
->input
);
461 mutex_unlock(&lis3
->mutex
);
464 static void lis3lv02d_joystick_open(struct input_polled_dev
*pidev
)
466 struct lis3lv02d
*lis3
= pidev
->private;
469 pm_runtime_get_sync(lis3
->pm_dev
);
471 if (lis3
->pdata
&& lis3
->whoami
== WAI_8B
&& lis3
->idev
)
472 atomic_set(&lis3
->wake_thread
, 1);
474 * Update coordinates for the case where poll interval is 0 and
475 * the chip in running purely under interrupt control
477 lis3lv02d_joystick_poll(pidev
);
480 static void lis3lv02d_joystick_close(struct input_polled_dev
*pidev
)
482 struct lis3lv02d
*lis3
= pidev
->private;
484 atomic_set(&lis3
->wake_thread
, 0);
486 pm_runtime_put(lis3
->pm_dev
);
489 static irqreturn_t
lis302dl_interrupt(int irq
, void *data
)
491 struct lis3lv02d
*lis3
= data
;
493 if (!test_bit(0, &lis3
->misc_opened
))
497 * Be careful: on some HP laptops the bios force DD when on battery and
498 * the lid is closed. This leads to interrupts as soon as a little move
501 atomic_inc(&lis3
->count
);
503 wake_up_interruptible(&lis3
->misc_wait
);
504 kill_fasync(&lis3
->async_queue
, SIGIO
, POLL_IN
);
506 if (atomic_read(&lis3
->wake_thread
))
507 return IRQ_WAKE_THREAD
;
511 static void lis302dl_interrupt_handle_click(struct lis3lv02d
*lis3
)
513 struct input_dev
*dev
= lis3
->idev
->input
;
516 mutex_lock(&lis3
->mutex
);
517 lis3
->read(lis3
, CLICK_SRC
, &click_src
);
519 if (click_src
& CLICK_SINGLE_X
) {
520 input_report_key(dev
, lis3
->mapped_btns
[0], 1);
521 input_report_key(dev
, lis3
->mapped_btns
[0], 0);
524 if (click_src
& CLICK_SINGLE_Y
) {
525 input_report_key(dev
, lis3
->mapped_btns
[1], 1);
526 input_report_key(dev
, lis3
->mapped_btns
[1], 0);
529 if (click_src
& CLICK_SINGLE_Z
) {
530 input_report_key(dev
, lis3
->mapped_btns
[2], 1);
531 input_report_key(dev
, lis3
->mapped_btns
[2], 0);
534 mutex_unlock(&lis3
->mutex
);
537 static inline void lis302dl_data_ready(struct lis3lv02d
*lis3
, int index
)
541 /* Dummy read to ack interrupt */
542 lis3lv02d_get_xyz(lis3
, &dummy
, &dummy
, &dummy
);
543 lis3
->data_ready_count
[index
]++;
546 static irqreturn_t
lis302dl_interrupt_thread1_8b(int irq
, void *data
)
548 struct lis3lv02d
*lis3
= data
;
549 u8 irq_cfg
= lis3
->irq_cfg
& LIS3_IRQ1_MASK
;
551 if (irq_cfg
== LIS3_IRQ1_CLICK
)
552 lis302dl_interrupt_handle_click(lis3
);
553 else if (unlikely(irq_cfg
== LIS3_IRQ1_DATA_READY
))
554 lis302dl_data_ready(lis3
, IRQ_LINE0
);
556 lis3lv02d_joystick_poll(lis3
->idev
);
561 static irqreturn_t
lis302dl_interrupt_thread2_8b(int irq
, void *data
)
563 struct lis3lv02d
*lis3
= data
;
564 u8 irq_cfg
= lis3
->irq_cfg
& LIS3_IRQ2_MASK
;
566 if (irq_cfg
== LIS3_IRQ2_CLICK
)
567 lis302dl_interrupt_handle_click(lis3
);
568 else if (unlikely(irq_cfg
== LIS3_IRQ2_DATA_READY
))
569 lis302dl_data_ready(lis3
, IRQ_LINE1
);
571 lis3lv02d_joystick_poll(lis3
->idev
);
576 static int lis3lv02d_misc_open(struct inode
*inode
, struct file
*file
)
578 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
579 struct lis3lv02d
, miscdev
);
581 if (test_and_set_bit(0, &lis3
->misc_opened
))
582 return -EBUSY
; /* already open */
585 pm_runtime_get_sync(lis3
->pm_dev
);
587 atomic_set(&lis3
->count
, 0);
591 static int lis3lv02d_misc_release(struct inode
*inode
, struct file
*file
)
593 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
594 struct lis3lv02d
, miscdev
);
596 fasync_helper(-1, file
, 0, &lis3
->async_queue
);
597 clear_bit(0, &lis3
->misc_opened
); /* release the device */
599 pm_runtime_put(lis3
->pm_dev
);
603 static ssize_t
lis3lv02d_misc_read(struct file
*file
, char __user
*buf
,
604 size_t count
, loff_t
*pos
)
606 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
607 struct lis3lv02d
, miscdev
);
609 DECLARE_WAITQUEUE(wait
, current
);
611 unsigned char byte_data
;
617 add_wait_queue(&lis3
->misc_wait
, &wait
);
619 set_current_state(TASK_INTERRUPTIBLE
);
620 data
= atomic_xchg(&lis3
->count
, 0);
624 if (file
->f_flags
& O_NONBLOCK
) {
629 if (signal_pending(current
)) {
630 retval
= -ERESTARTSYS
;
642 /* make sure we are not going into copy_to_user() with
643 * TASK_INTERRUPTIBLE state */
644 set_current_state(TASK_RUNNING
);
645 if (copy_to_user(buf
, &byte_data
, sizeof(byte_data
)))
649 __set_current_state(TASK_RUNNING
);
650 remove_wait_queue(&lis3
->misc_wait
, &wait
);
655 static unsigned int lis3lv02d_misc_poll(struct file
*file
, poll_table
*wait
)
657 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
658 struct lis3lv02d
, miscdev
);
660 poll_wait(file
, &lis3
->misc_wait
, wait
);
661 if (atomic_read(&lis3
->count
))
662 return POLLIN
| POLLRDNORM
;
666 static int lis3lv02d_misc_fasync(int fd
, struct file
*file
, int on
)
668 struct lis3lv02d
*lis3
= container_of(file
->private_data
,
669 struct lis3lv02d
, miscdev
);
671 return fasync_helper(fd
, file
, on
, &lis3
->async_queue
);
674 static const struct file_operations lis3lv02d_misc_fops
= {
675 .owner
= THIS_MODULE
,
677 .read
= lis3lv02d_misc_read
,
678 .open
= lis3lv02d_misc_open
,
679 .release
= lis3lv02d_misc_release
,
680 .poll
= lis3lv02d_misc_poll
,
681 .fasync
= lis3lv02d_misc_fasync
,
684 int lis3lv02d_joystick_enable(struct lis3lv02d
*lis3
)
686 struct input_dev
*input_dev
;
688 int max_val
, fuzz
, flat
;
689 int btns
[] = {BTN_X
, BTN_Y
, BTN_Z
};
694 lis3
->idev
= input_allocate_polled_device();
698 lis3
->idev
->poll
= lis3lv02d_joystick_poll
;
699 lis3
->idev
->open
= lis3lv02d_joystick_open
;
700 lis3
->idev
->close
= lis3lv02d_joystick_close
;
701 lis3
->idev
->poll_interval
= MDPS_POLL_INTERVAL
;
702 lis3
->idev
->poll_interval_min
= MDPS_POLL_MIN
;
703 lis3
->idev
->poll_interval_max
= MDPS_POLL_MAX
;
704 lis3
->idev
->private = lis3
;
705 input_dev
= lis3
->idev
->input
;
707 input_dev
->name
= "ST LIS3LV02DL Accelerometer";
708 input_dev
->phys
= DRIVER_NAME
"/input0";
709 input_dev
->id
.bustype
= BUS_HOST
;
710 input_dev
->id
.vendor
= 0;
711 input_dev
->dev
.parent
= &lis3
->pdev
->dev
;
713 set_bit(EV_ABS
, input_dev
->evbit
);
714 max_val
= (lis3
->mdps_max_val
* lis3
->scale
) / LIS3_ACCURACY
;
715 if (lis3
->whoami
== WAI_12B
) {
716 fuzz
= LIS3_DEFAULT_FUZZ_12B
;
717 flat
= LIS3_DEFAULT_FLAT_12B
;
719 fuzz
= LIS3_DEFAULT_FUZZ_8B
;
720 flat
= LIS3_DEFAULT_FLAT_8B
;
722 fuzz
= (fuzz
* lis3
->scale
) / LIS3_ACCURACY
;
723 flat
= (flat
* lis3
->scale
) / LIS3_ACCURACY
;
725 input_set_abs_params(input_dev
, ABS_X
, -max_val
, max_val
, fuzz
, flat
);
726 input_set_abs_params(input_dev
, ABS_Y
, -max_val
, max_val
, fuzz
, flat
);
727 input_set_abs_params(input_dev
, ABS_Z
, -max_val
, max_val
, fuzz
, flat
);
729 lis3
->mapped_btns
[0] = lis3lv02d_get_axis(abs(lis3
->ac
.x
), btns
);
730 lis3
->mapped_btns
[1] = lis3lv02d_get_axis(abs(lis3
->ac
.y
), btns
);
731 lis3
->mapped_btns
[2] = lis3lv02d_get_axis(abs(lis3
->ac
.z
), btns
);
733 err
= input_register_polled_device(lis3
->idev
);
735 input_free_polled_device(lis3
->idev
);
741 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable
);
743 void lis3lv02d_joystick_disable(struct lis3lv02d
*lis3
)
746 free_irq(lis3
->irq
, lis3
);
747 if (lis3
->pdata
&& lis3
->pdata
->irq2
)
748 free_irq(lis3
->pdata
->irq2
, lis3
);
754 misc_deregister(&lis3
->miscdev
);
755 input_unregister_polled_device(lis3
->idev
);
756 input_free_polled_device(lis3
->idev
);
759 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable
);
762 static void lis3lv02d_sysfs_poweron(struct lis3lv02d
*lis3
)
765 * SYSFS functions are fast visitors so put-call
766 * immediately after the get-call. However, keep
767 * chip running for a while and schedule delayed
768 * suspend. This way periodic sysfs calls doesn't
769 * suffer from relatively long power up time.
773 pm_runtime_get_sync(lis3
->pm_dev
);
774 pm_runtime_put_noidle(lis3
->pm_dev
);
775 pm_schedule_suspend(lis3
->pm_dev
, LIS3_SYSFS_POWERDOWN_DELAY
);
779 static ssize_t
lis3lv02d_selftest_show(struct device
*dev
,
780 struct device_attribute
*attr
, char *buf
)
782 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
785 static const char ok
[] = "OK";
786 static const char fail
[] = "FAIL";
787 static const char irq
[] = "FAIL_IRQ";
790 lis3lv02d_sysfs_poweron(lis3
);
791 switch (lis3lv02d_selftest(lis3
, values
)) {
803 return sprintf(buf
, "%s %d %d %d\n", res
,
804 values
[0], values
[1], values
[2]);
807 static ssize_t
lis3lv02d_position_show(struct device
*dev
,
808 struct device_attribute
*attr
, char *buf
)
810 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
813 lis3lv02d_sysfs_poweron(lis3
);
814 mutex_lock(&lis3
->mutex
);
815 lis3lv02d_get_xyz(lis3
, &x
, &y
, &z
);
816 mutex_unlock(&lis3
->mutex
);
817 return sprintf(buf
, "(%d,%d,%d)\n", x
, y
, z
);
820 static ssize_t
lis3lv02d_rate_show(struct device
*dev
,
821 struct device_attribute
*attr
, char *buf
)
823 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
825 lis3lv02d_sysfs_poweron(lis3
);
826 return sprintf(buf
, "%d\n", lis3lv02d_get_odr(lis3
));
829 static ssize_t
lis3lv02d_rate_set(struct device
*dev
,
830 struct device_attribute
*attr
, const char *buf
,
833 struct lis3lv02d
*lis3
= dev_get_drvdata(dev
);
836 if (strict_strtoul(buf
, 0, &rate
))
839 lis3lv02d_sysfs_poweron(lis3
);
840 if (lis3lv02d_set_odr(lis3
, rate
))
846 static DEVICE_ATTR(selftest
, S_IRUSR
, lis3lv02d_selftest_show
, NULL
);
847 static DEVICE_ATTR(position
, S_IRUGO
, lis3lv02d_position_show
, NULL
);
848 static DEVICE_ATTR(rate
, S_IRUGO
| S_IWUSR
, lis3lv02d_rate_show
,
851 static struct attribute
*lis3lv02d_attributes
[] = {
852 &dev_attr_selftest
.attr
,
853 &dev_attr_position
.attr
,
858 static struct attribute_group lis3lv02d_attribute_group
= {
859 .attrs
= lis3lv02d_attributes
863 static int lis3lv02d_add_fs(struct lis3lv02d
*lis3
)
865 lis3
->pdev
= platform_device_register_simple(DRIVER_NAME
, -1, NULL
, 0);
866 if (IS_ERR(lis3
->pdev
))
867 return PTR_ERR(lis3
->pdev
);
869 platform_set_drvdata(lis3
->pdev
, lis3
);
870 return sysfs_create_group(&lis3
->pdev
->dev
.kobj
, &lis3lv02d_attribute_group
);
873 int lis3lv02d_remove_fs(struct lis3lv02d
*lis3
)
875 sysfs_remove_group(&lis3
->pdev
->dev
.kobj
, &lis3lv02d_attribute_group
);
876 platform_device_unregister(lis3
->pdev
);
878 /* Barrier after the sysfs remove */
879 pm_runtime_barrier(lis3
->pm_dev
);
881 /* SYSFS may have left chip running. Turn off if necessary */
882 if (!pm_runtime_suspended(lis3
->pm_dev
))
883 lis3lv02d_poweroff(lis3
);
885 pm_runtime_disable(lis3
->pm_dev
);
886 pm_runtime_set_suspended(lis3
->pm_dev
);
888 kfree(lis3
->reg_cache
);
891 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs
);
893 static void lis3lv02d_8b_configure(struct lis3lv02d
*lis3
,
894 struct lis3lv02d_platform_data
*p
)
897 int ctrl2
= p
->hipass_ctrl
;
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));
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
);
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*/
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*/
932 /* Configure hipass filters */
933 lis3
->write(lis3
, CTRL_REG2
, ctrl2
);
936 err
= request_threaded_irq(p
->irq2
,
938 lis302dl_interrupt_thread2_8b
,
939 IRQF_TRIGGER_RISING
| IRQF_ONESHOT
|
940 (p
->irq_flags2
& IRQF_TRIGGER_MASK
),
943 pr_err("No second IRQ. Limited functionality\n");
948 int lis3lv02d_init_dt(struct lis3lv02d
*lis3
)
950 struct lis3lv02d_platform_data
*pdata
;
951 struct device_node
*np
= lis3
->of_node
;
957 pdata
= kzalloc(sizeof(*pdata
), GFP_KERNEL
);
961 if (of_get_property(np
, "st,click-single-x", NULL
))
962 pdata
->click_flags
|= LIS3_CLICK_SINGLE_X
;
963 if (of_get_property(np
, "st,click-double-x", NULL
))
964 pdata
->click_flags
|= LIS3_CLICK_DOUBLE_X
;
966 if (of_get_property(np
, "st,click-single-y", NULL
))
967 pdata
->click_flags
|= LIS3_CLICK_SINGLE_Y
;
968 if (of_get_property(np
, "st,click-double-y", NULL
))
969 pdata
->click_flags
|= LIS3_CLICK_DOUBLE_Y
;
971 if (of_get_property(np
, "st,click-single-z", NULL
))
972 pdata
->click_flags
|= LIS3_CLICK_SINGLE_Z
;
973 if (of_get_property(np
, "st,click-double-z", NULL
))
974 pdata
->click_flags
|= LIS3_CLICK_DOUBLE_Z
;
976 if (!of_property_read_u32(np
, "st,click-threshold-x", &val
))
977 pdata
->click_thresh_x
= val
;
978 if (!of_property_read_u32(np
, "st,click-threshold-y", &val
))
979 pdata
->click_thresh_y
= val
;
980 if (!of_property_read_u32(np
, "st,click-threshold-z", &val
))
981 pdata
->click_thresh_z
= val
;
983 if (!of_property_read_u32(np
, "st,click-time-limit", &val
))
984 pdata
->click_time_limit
= val
;
985 if (!of_property_read_u32(np
, "st,click-latency", &val
))
986 pdata
->click_latency
= val
;
987 if (!of_property_read_u32(np
, "st,click-window", &val
))
988 pdata
->click_window
= val
;
990 if (of_get_property(np
, "st,irq1-disable", NULL
))
991 pdata
->irq_cfg
|= LIS3_IRQ1_DISABLE
;
992 if (of_get_property(np
, "st,irq1-ff-wu-1", NULL
))
993 pdata
->irq_cfg
|= LIS3_IRQ1_FF_WU_1
;
994 if (of_get_property(np
, "st,irq1-ff-wu-2", NULL
))
995 pdata
->irq_cfg
|= LIS3_IRQ1_FF_WU_2
;
996 if (of_get_property(np
, "st,irq1-data-ready", NULL
))
997 pdata
->irq_cfg
|= LIS3_IRQ1_DATA_READY
;
998 if (of_get_property(np
, "st,irq1-click", NULL
))
999 pdata
->irq_cfg
|= LIS3_IRQ1_CLICK
;
1001 if (of_get_property(np
, "st,irq2-disable", NULL
))
1002 pdata
->irq_cfg
|= LIS3_IRQ2_DISABLE
;
1003 if (of_get_property(np
, "st,irq2-ff-wu-1", NULL
))
1004 pdata
->irq_cfg
|= LIS3_IRQ2_FF_WU_1
;
1005 if (of_get_property(np
, "st,irq2-ff-wu-2", NULL
))
1006 pdata
->irq_cfg
|= LIS3_IRQ2_FF_WU_2
;
1007 if (of_get_property(np
, "st,irq2-data-ready", NULL
))
1008 pdata
->irq_cfg
|= LIS3_IRQ2_DATA_READY
;
1009 if (of_get_property(np
, "st,irq2-click", NULL
))
1010 pdata
->irq_cfg
|= LIS3_IRQ2_CLICK
;
1012 if (of_get_property(np
, "st,irq-open-drain", NULL
))
1013 pdata
->irq_cfg
|= LIS3_IRQ_OPEN_DRAIN
;
1014 if (of_get_property(np
, "st,irq-active-low", NULL
))
1015 pdata
->irq_cfg
|= LIS3_IRQ_ACTIVE_LOW
;
1017 if (!of_property_read_u32(np
, "st,wu-duration-1", &val
))
1018 pdata
->duration1
= val
;
1019 if (!of_property_read_u32(np
, "st,wu-duration-2", &val
))
1020 pdata
->duration2
= val
;
1022 if (of_get_property(np
, "st,wakeup-x-lo", NULL
))
1023 pdata
->wakeup_flags
|= LIS3_WAKEUP_X_LO
;
1024 if (of_get_property(np
, "st,wakeup-x-hi", NULL
))
1025 pdata
->wakeup_flags
|= LIS3_WAKEUP_X_HI
;
1026 if (of_get_property(np
, "st,wakeup-y-lo", NULL
))
1027 pdata
->wakeup_flags
|= LIS3_WAKEUP_Y_LO
;
1028 if (of_get_property(np
, "st,wakeup-y-hi", NULL
))
1029 pdata
->wakeup_flags
|= LIS3_WAKEUP_Y_HI
;
1030 if (of_get_property(np
, "st,wakeup-z-lo", NULL
))
1031 pdata
->wakeup_flags
|= LIS3_WAKEUP_Z_LO
;
1032 if (of_get_property(np
, "st,wakeup-z-hi", NULL
))
1033 pdata
->wakeup_flags
|= LIS3_WAKEUP_Z_HI
;
1035 if (!of_property_read_u32(np
, "st,highpass-cutoff-hz", &val
)) {
1038 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_1HZ
;
1041 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_2HZ
;
1044 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_4HZ
;
1047 pdata
->hipass_ctrl
= LIS3_HIPASS_CUTFF_8HZ
;
1052 if (of_get_property(np
, "st,hipass1-disable", NULL
))
1053 pdata
->hipass_ctrl
|= LIS3_HIPASS1_DISABLE
;
1054 if (of_get_property(np
, "st,hipass2-disable", NULL
))
1055 pdata
->hipass_ctrl
|= LIS3_HIPASS2_DISABLE
;
1057 if (of_get_property(np
, "st,axis-x", &val
))
1058 pdata
->axis_x
= val
;
1059 if (of_get_property(np
, "st,axis-y", &val
))
1060 pdata
->axis_y
= val
;
1061 if (of_get_property(np
, "st,axis-z", &val
))
1062 pdata
->axis_z
= val
;
1064 if (of_get_property(np
, "st,default-rate", NULL
))
1065 pdata
->default_rate
= val
;
1067 if (of_get_property(np
, "st,min-limit-x", &val
))
1068 pdata
->st_min_limits
[0] = val
;
1069 if (of_get_property(np
, "st,min-limit-y", &val
))
1070 pdata
->st_min_limits
[1] = val
;
1071 if (of_get_property(np
, "st,min-limit-z", &val
))
1072 pdata
->st_min_limits
[2] = val
;
1074 if (of_get_property(np
, "st,max-limit-x", &val
))
1075 pdata
->st_max_limits
[0] = val
;
1076 if (of_get_property(np
, "st,max-limit-y", &val
))
1077 pdata
->st_max_limits
[1] = val
;
1078 if (of_get_property(np
, "st,max-limit-z", &val
))
1079 pdata
->st_max_limits
[2] = val
;
1082 lis3
->pdata
= pdata
;
1088 int lis3lv02d_init_dt(struct lis3lv02d
*lis3
)
1093 EXPORT_SYMBOL_GPL(lis3lv02d_init_dt
);
1096 * Initialise the accelerometer and the various subsystems.
1097 * Should be rather independent of the bus system.
1099 int lis3lv02d_init_device(struct lis3lv02d
*lis3
)
1102 irq_handler_t thread_fn
;
1105 lis3
->whoami
= lis3lv02d_read_8(lis3
, WHO_AM_I
);
1107 switch (lis3
->whoami
) {
1109 pr_info("12 bits sensor found\n");
1110 lis3
->read_data
= lis3lv02d_read_12
;
1111 lis3
->mdps_max_val
= 2048;
1112 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_12B
;
1113 lis3
->odrs
= lis3_12_rates
;
1114 lis3
->odr_mask
= CTRL1_DF0
| CTRL1_DF1
;
1115 lis3
->scale
= LIS3_SENSITIVITY_12B
;
1116 lis3
->regs
= lis3_wai12_regs
;
1117 lis3
->regs_size
= ARRAY_SIZE(lis3_wai12_regs
);
1120 pr_info("8 bits sensor found\n");
1121 lis3
->read_data
= lis3lv02d_read_8
;
1122 lis3
->mdps_max_val
= 128;
1123 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
1124 lis3
->odrs
= lis3_8_rates
;
1125 lis3
->odr_mask
= CTRL1_DR
;
1126 lis3
->scale
= LIS3_SENSITIVITY_8B
;
1127 lis3
->regs
= lis3_wai8_regs
;
1128 lis3
->regs_size
= ARRAY_SIZE(lis3_wai8_regs
);
1131 pr_info("8 bits 3DC sensor found\n");
1132 lis3
->read_data
= lis3lv02d_read_8
;
1133 lis3
->mdps_max_val
= 128;
1134 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
1135 lis3
->odrs
= lis3_3dc_rates
;
1136 lis3
->odr_mask
= CTRL1_ODR0
|CTRL1_ODR1
|CTRL1_ODR2
|CTRL1_ODR3
;
1137 lis3
->scale
= LIS3_SENSITIVITY_8B
;
1140 pr_info("16 bits lis331dlh sensor found\n");
1141 lis3
->read_data
= lis331dlh_read_data
;
1142 lis3
->mdps_max_val
= 2048; /* 12 bits for 2G */
1143 lis3
->shift_adj
= SHIFT_ADJ_2G
;
1144 lis3
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
1145 lis3
->odrs
= lis3_3dlh_rates
;
1146 lis3
->odr_mask
= CTRL1_DR0
| CTRL1_DR1
;
1147 lis3
->scale
= LIS3DLH_SENSITIVITY_2G
;
1150 pr_err("unknown sensor type 0x%X\n", lis3
->whoami
);
1154 lis3
->reg_cache
= kzalloc(max(sizeof(lis3_wai8_regs
),
1155 sizeof(lis3_wai12_regs
)), GFP_KERNEL
);
1157 if (lis3
->reg_cache
== NULL
) {
1158 printk(KERN_ERR DRIVER_NAME
"out of memory\n");
1162 mutex_init(&lis3
->mutex
);
1163 atomic_set(&lis3
->wake_thread
, 0);
1165 lis3lv02d_add_fs(lis3
);
1166 err
= lis3lv02d_poweron(lis3
);
1168 lis3lv02d_remove_fs(lis3
);
1173 pm_runtime_set_active(lis3
->pm_dev
);
1174 pm_runtime_enable(lis3
->pm_dev
);
1177 if (lis3lv02d_joystick_enable(lis3
))
1178 pr_err("joystick initialization failed\n");
1180 /* passing in platform specific data is purely optional and only
1181 * used by the SPI transport layer at the moment */
1183 struct lis3lv02d_platform_data
*p
= lis3
->pdata
;
1185 if (lis3
->whoami
== WAI_8B
)
1186 lis3lv02d_8b_configure(lis3
, p
);
1188 irq_flags
= p
->irq_flags1
& IRQF_TRIGGER_MASK
;
1190 lis3
->irq_cfg
= p
->irq_cfg
;
1192 lis3
->write(lis3
, CTRL_REG3
, p
->irq_cfg
);
1194 if (p
->default_rate
)
1195 lis3lv02d_set_odr(lis3
, p
->default_rate
);
1198 /* bail if we did not get an IRQ from the bus layer */
1200 pr_debug("No IRQ. Disabling /dev/freefall\n");
1205 * The sensor can generate interrupts for free-fall and direction
1206 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
1207 * the things simple and _fast_ we activate it only for free-fall, so
1208 * no need to read register (very slow with ACPI). For the same reason,
1209 * we forbid shared interrupts.
1211 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
1212 * io-apic is not configurable (and generates a warning) but I keep it
1213 * in case of support for other hardware.
1215 if (lis3
->pdata
&& lis3
->whoami
== WAI_8B
)
1216 thread_fn
= lis302dl_interrupt_thread1_8b
;
1220 err
= request_threaded_irq(lis3
->irq
, lis302dl_interrupt
,
1222 IRQF_TRIGGER_RISING
| IRQF_ONESHOT
|
1227 pr_err("Cannot get IRQ\n");
1231 lis3
->miscdev
.minor
= MISC_DYNAMIC_MINOR
;
1232 lis3
->miscdev
.name
= "freefall";
1233 lis3
->miscdev
.fops
= &lis3lv02d_misc_fops
;
1235 if (misc_register(&lis3
->miscdev
))
1236 pr_err("misc_register failed\n");
1240 EXPORT_SYMBOL_GPL(lis3lv02d_init_device
);
1242 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1243 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1244 MODULE_LICENSE("GPL");