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 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/dmi.h>
26 #include <linux/module.h>
27 #include <linux/types.h>
28 #include <linux/platform_device.h>
29 #include <linux/interrupt.h>
30 #include <linux/input-polldev.h>
31 #include <linux/delay.h>
32 #include <linux/wait.h>
33 #include <linux/poll.h>
34 #include <linux/slab.h>
35 #include <linux/freezer.h>
36 #include <linux/uaccess.h>
37 #include <linux/miscdevice.h>
38 #include <linux/pm_runtime.h>
39 #include <asm/atomic.h>
40 #include "lis3lv02d.h"
42 #define DRIVER_NAME "lis3lv02d"
44 /* joystick device poll interval in milliseconds */
45 #define MDPS_POLL_INTERVAL 50
46 #define MDPS_POLL_MIN 0
47 #define MDPS_POLL_MAX 2000
49 #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
52 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
53 * because they are generated even if the data do not change. So it's better
54 * to keep the interrupt for the free-fall event. The values are updated at
55 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
56 * some low processor, we poll the sensor only at 20Hz... enough for the
60 #define LIS3_PWRON_DELAY_WAI_12B (5000)
61 #define LIS3_PWRON_DELAY_WAI_8B (3000)
64 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
65 * LIS302D spec says: 18 mG / digit
66 * LIS3_ACCURACY is used to increase accuracy of the intermediate
67 * calculation results.
69 #define LIS3_ACCURACY 1024
70 /* Sensitivity values for -2G +2G scale */
71 #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
72 #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
74 #define LIS3_DEFAULT_FUZZ 3
75 #define LIS3_DEFAULT_FLAT 3
77 struct lis3lv02d lis3_dev
= {
78 .misc_wait
= __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev
.misc_wait
),
81 EXPORT_SYMBOL_GPL(lis3_dev
);
83 /* just like param_set_int() but does sanity-check so that it won't point
84 * over the axis array size
86 static int param_set_axis(const char *val
, const struct kernel_param
*kp
)
88 int ret
= param_set_int(val
, kp
);
90 int val
= *(int *)kp
->arg
;
99 static struct kernel_param_ops param_ops_axis
= {
100 .set
= param_set_axis
,
101 .get
= param_get_int
,
104 module_param_array_named(axes
, lis3_dev
.ac
.as_array
, axis
, NULL
, 0644);
105 MODULE_PARM_DESC(axes
, "Axis-mapping for x,y,z directions");
107 static s16
lis3lv02d_read_8(struct lis3lv02d
*lis3
, int reg
)
110 if (lis3
->read(lis3
, reg
, &lo
) < 0)
116 static s16
lis3lv02d_read_12(struct lis3lv02d
*lis3
, int reg
)
120 lis3
->read(lis3
, reg
- 1, &lo
);
121 lis3
->read(lis3
, reg
, &hi
);
122 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
123 return (s16
)((hi
<< 8) | lo
);
127 * lis3lv02d_get_axis - For the given axis, give the value converted
128 * @axis: 1,2,3 - can also be negative
129 * @hw_values: raw values returned by the hardware
131 * Returns the converted value.
133 static inline int lis3lv02d_get_axis(s8 axis
, int hw_values
[3])
136 return hw_values
[axis
- 1];
138 return -hw_values
[-axis
- 1];
142 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
143 * @lis3: pointer to the device struct
144 * @x: where to store the X axis value
145 * @y: where to store the Y axis value
146 * @z: where to store the Z axis value
148 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
150 static void lis3lv02d_get_xyz(struct lis3lv02d
*lis3
, int *x
, int *y
, int *z
)
155 position
[0] = lis3
->read_data(lis3
, OUTX
);
156 position
[1] = lis3
->read_data(lis3
, OUTY
);
157 position
[2] = lis3
->read_data(lis3
, OUTZ
);
159 for (i
= 0; i
< 3; i
++)
160 position
[i
] = (position
[i
] * lis3
->scale
) / LIS3_ACCURACY
;
162 *x
= lis3lv02d_get_axis(lis3
->ac
.x
, position
);
163 *y
= lis3lv02d_get_axis(lis3
->ac
.y
, position
);
164 *z
= lis3lv02d_get_axis(lis3
->ac
.z
, position
);
167 /* conversion btw sampling rate and the register values */
168 static int lis3_12_rates
[4] = {40, 160, 640, 2560};
169 static int lis3_8_rates
[2] = {100, 400};
170 static int lis3_3dc_rates
[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
172 /* ODR is Output Data Rate */
173 static int lis3lv02d_get_odr(void)
178 lis3_dev
.read(&lis3_dev
, CTRL_REG1
, &ctrl
);
179 ctrl
&= lis3_dev
.odr_mask
;
180 shift
= ffs(lis3_dev
.odr_mask
) - 1;
181 return lis3_dev
.odrs
[(ctrl
>> shift
)];
184 static int lis3lv02d_set_odr(int rate
)
192 lis3_dev
.read(&lis3_dev
, CTRL_REG1
, &ctrl
);
193 ctrl
&= ~lis3_dev
.odr_mask
;
194 len
= 1 << hweight_long(lis3_dev
.odr_mask
); /* # of possible values */
195 shift
= ffs(lis3_dev
.odr_mask
) - 1;
197 for (i
= 0; i
< len
; i
++)
198 if (lis3_dev
.odrs
[i
] == rate
) {
199 lis3_dev
.write(&lis3_dev
, CTRL_REG1
,
200 ctrl
| (i
<< shift
));
206 static int lis3lv02d_selftest(struct lis3lv02d
*lis3
, s16 results
[3])
213 mutex_lock(&lis3
->mutex
);
214 if (lis3_dev
.whoami
== WAI_3DC
) {
216 selftest
= CTRL4_ST0
;
219 if (lis3_dev
.whoami
== WAI_12B
)
222 selftest
= CTRL1_STP
;
225 lis3
->read(lis3
, ctlreg
, ®
);
226 lis3
->write(lis3
, ctlreg
, (reg
| selftest
));
227 msleep(lis3
->pwron_delay
/ lis3lv02d_get_odr());
229 /* Read directly to avoid axis remap */
230 x
= lis3
->read_data(lis3
, OUTX
);
231 y
= lis3
->read_data(lis3
, OUTY
);
232 z
= lis3
->read_data(lis3
, OUTZ
);
234 /* back to normal settings */
235 lis3
->write(lis3
, ctlreg
, reg
);
236 msleep(lis3
->pwron_delay
/ lis3lv02d_get_odr());
238 results
[0] = x
- lis3
->read_data(lis3
, OUTX
);
239 results
[1] = y
- lis3
->read_data(lis3
, OUTY
);
240 results
[2] = z
- lis3
->read_data(lis3
, OUTZ
);
245 for (i
= 0; i
< 3; i
++) {
246 /* Check against selftest acceptance limits */
247 if ((results
[i
] < lis3
->pdata
->st_min_limits
[i
]) ||
248 (results
[i
] > lis3
->pdata
->st_max_limits
[i
])) {
257 mutex_unlock(&lis3
->mutex
);
262 * Order of registers in the list affects to order of the restore process.
263 * Perhaps it is a good idea to set interrupt enable register as a last one
264 * after all other configurations
266 static u8 lis3_wai8_regs
[] = { FF_WU_CFG_1
, FF_WU_THS_1
, FF_WU_DURATION_1
,
267 FF_WU_CFG_2
, FF_WU_THS_2
, FF_WU_DURATION_2
,
268 CLICK_CFG
, CLICK_SRC
, CLICK_THSY_X
, CLICK_THSZ
,
269 CLICK_TIMELIMIT
, CLICK_LATENCY
, CLICK_WINDOW
,
270 CTRL_REG1
, CTRL_REG2
, CTRL_REG3
};
272 static u8 lis3_wai12_regs
[] = {FF_WU_CFG
, FF_WU_THS_L
, FF_WU_THS_H
,
273 FF_WU_DURATION
, DD_CFG
, DD_THSI_L
, DD_THSI_H
,
274 DD_THSE_L
, DD_THSE_H
,
275 CTRL_REG1
, CTRL_REG3
, CTRL_REG2
};
277 static inline void lis3_context_save(struct lis3lv02d
*lis3
)
280 for (i
= 0; i
< lis3
->regs_size
; i
++)
281 lis3
->read(lis3
, lis3
->regs
[i
], &lis3
->reg_cache
[i
]);
282 lis3
->regs_stored
= true;
285 static inline void lis3_context_restore(struct lis3lv02d
*lis3
)
288 if (lis3
->regs_stored
)
289 for (i
= 0; i
< lis3
->regs_size
; i
++)
290 lis3
->write(lis3
, lis3
->regs
[i
], lis3
->reg_cache
[i
]);
293 void lis3lv02d_poweroff(struct lis3lv02d
*lis3
)
296 lis3_context_save(lis3
);
297 /* disable X,Y,Z axis and power down */
298 lis3
->write(lis3
, CTRL_REG1
, 0x00);
300 lis3
->reg_ctrl(lis3
, LIS3_REG_OFF
);
302 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff
);
304 void lis3lv02d_poweron(struct lis3lv02d
*lis3
)
310 /* LIS3 power on delay is quite long */
311 msleep(lis3
->pwron_delay
/ lis3lv02d_get_odr());
314 * Common configuration
315 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
316 * both have been read. So the value read will always be correct.
318 if (lis3
->whoami
== WAI_12B
) {
319 lis3
->read(lis3
, CTRL_REG2
, ®
);
321 lis3
->write(lis3
, CTRL_REG2
, reg
);
324 lis3_context_restore(lis3
);
326 EXPORT_SYMBOL_GPL(lis3lv02d_poweron
);
329 static void lis3lv02d_joystick_poll(struct input_polled_dev
*pidev
)
333 mutex_lock(&lis3_dev
.mutex
);
334 lis3lv02d_get_xyz(&lis3_dev
, &x
, &y
, &z
);
335 input_report_abs(pidev
->input
, ABS_X
, x
);
336 input_report_abs(pidev
->input
, ABS_Y
, y
);
337 input_report_abs(pidev
->input
, ABS_Z
, z
);
338 input_sync(pidev
->input
);
339 mutex_unlock(&lis3_dev
.mutex
);
342 static void lis3lv02d_joystick_open(struct input_polled_dev
*pidev
)
345 pm_runtime_get_sync(lis3_dev
.pm_dev
);
348 static void lis3lv02d_joystick_close(struct input_polled_dev
*pidev
)
351 pm_runtime_put(lis3_dev
.pm_dev
);
354 static irqreturn_t
lis302dl_interrupt(int irq
, void *dummy
)
356 if (!test_bit(0, &lis3_dev
.misc_opened
))
360 * Be careful: on some HP laptops the bios force DD when on battery and
361 * the lid is closed. This leads to interrupts as soon as a little move
364 atomic_inc(&lis3_dev
.count
);
366 wake_up_interruptible(&lis3_dev
.misc_wait
);
367 kill_fasync(&lis3_dev
.async_queue
, SIGIO
, POLL_IN
);
369 if (lis3_dev
.pdata
&& lis3_dev
.whoami
== WAI_8B
&& lis3_dev
.idev
&&
370 lis3_dev
.idev
->input
->users
)
371 return IRQ_WAKE_THREAD
;
375 static void lis302dl_interrupt_handle_click(struct lis3lv02d
*lis3
)
377 struct input_dev
*dev
= lis3
->idev
->input
;
380 mutex_lock(&lis3
->mutex
);
381 lis3
->read(lis3
, CLICK_SRC
, &click_src
);
383 if (click_src
& CLICK_SINGLE_X
) {
384 input_report_key(dev
, lis3
->mapped_btns
[0], 1);
385 input_report_key(dev
, lis3
->mapped_btns
[0], 0);
388 if (click_src
& CLICK_SINGLE_Y
) {
389 input_report_key(dev
, lis3
->mapped_btns
[1], 1);
390 input_report_key(dev
, lis3
->mapped_btns
[1], 0);
393 if (click_src
& CLICK_SINGLE_Z
) {
394 input_report_key(dev
, lis3
->mapped_btns
[2], 1);
395 input_report_key(dev
, lis3
->mapped_btns
[2], 0);
398 mutex_unlock(&lis3
->mutex
);
401 static void lis302dl_interrupt_handle_ff_wu(struct lis3lv02d
*lis3
)
406 lis3
->read(lis3
, FF_WU_SRC_1
, &wu1_src
);
407 lis3
->read(lis3
, FF_WU_SRC_2
, &wu2_src
);
409 wu1_src
= wu1_src
& FF_WU_SRC_IA
? wu1_src
: 0;
410 wu2_src
= wu2_src
& FF_WU_SRC_IA
? wu2_src
: 0;
412 /* joystick poll is internally protected by the lis3->mutex. */
413 if (wu1_src
|| wu2_src
)
414 lis3lv02d_joystick_poll(lis3_dev
.idev
);
417 static irqreturn_t
lis302dl_interrupt_thread1_8b(int irq
, void *data
)
420 struct lis3lv02d
*lis3
= data
;
422 if ((lis3
->pdata
->irq_cfg
& LIS3_IRQ1_MASK
) == LIS3_IRQ1_CLICK
)
423 lis302dl_interrupt_handle_click(lis3
);
425 lis302dl_interrupt_handle_ff_wu(lis3
);
430 static irqreturn_t
lis302dl_interrupt_thread2_8b(int irq
, void *data
)
433 struct lis3lv02d
*lis3
= data
;
435 if ((lis3
->pdata
->irq_cfg
& LIS3_IRQ2_MASK
) == LIS3_IRQ2_CLICK
)
436 lis302dl_interrupt_handle_click(lis3
);
438 lis302dl_interrupt_handle_ff_wu(lis3
);
443 static int lis3lv02d_misc_open(struct inode
*inode
, struct file
*file
)
445 if (test_and_set_bit(0, &lis3_dev
.misc_opened
))
446 return -EBUSY
; /* already open */
449 pm_runtime_get_sync(lis3_dev
.pm_dev
);
451 atomic_set(&lis3_dev
.count
, 0);
455 static int lis3lv02d_misc_release(struct inode
*inode
, struct file
*file
)
457 fasync_helper(-1, file
, 0, &lis3_dev
.async_queue
);
458 clear_bit(0, &lis3_dev
.misc_opened
); /* release the device */
460 pm_runtime_put(lis3_dev
.pm_dev
);
464 static ssize_t
lis3lv02d_misc_read(struct file
*file
, char __user
*buf
,
465 size_t count
, loff_t
*pos
)
467 DECLARE_WAITQUEUE(wait
, current
);
469 unsigned char byte_data
;
475 add_wait_queue(&lis3_dev
.misc_wait
, &wait
);
477 set_current_state(TASK_INTERRUPTIBLE
);
478 data
= atomic_xchg(&lis3_dev
.count
, 0);
482 if (file
->f_flags
& O_NONBLOCK
) {
487 if (signal_pending(current
)) {
488 retval
= -ERESTARTSYS
;
500 /* make sure we are not going into copy_to_user() with
501 * TASK_INTERRUPTIBLE state */
502 set_current_state(TASK_RUNNING
);
503 if (copy_to_user(buf
, &byte_data
, sizeof(byte_data
)))
507 __set_current_state(TASK_RUNNING
);
508 remove_wait_queue(&lis3_dev
.misc_wait
, &wait
);
513 static unsigned int lis3lv02d_misc_poll(struct file
*file
, poll_table
*wait
)
515 poll_wait(file
, &lis3_dev
.misc_wait
, wait
);
516 if (atomic_read(&lis3_dev
.count
))
517 return POLLIN
| POLLRDNORM
;
521 static int lis3lv02d_misc_fasync(int fd
, struct file
*file
, int on
)
523 return fasync_helper(fd
, file
, on
, &lis3_dev
.async_queue
);
526 static const struct file_operations lis3lv02d_misc_fops
= {
527 .owner
= THIS_MODULE
,
529 .read
= lis3lv02d_misc_read
,
530 .open
= lis3lv02d_misc_open
,
531 .release
= lis3lv02d_misc_release
,
532 .poll
= lis3lv02d_misc_poll
,
533 .fasync
= lis3lv02d_misc_fasync
,
536 static struct miscdevice lis3lv02d_misc_device
= {
537 .minor
= MISC_DYNAMIC_MINOR
,
539 .fops
= &lis3lv02d_misc_fops
,
542 int lis3lv02d_joystick_enable(void)
544 struct input_dev
*input_dev
;
546 int max_val
, fuzz
, flat
;
547 int btns
[] = {BTN_X
, BTN_Y
, BTN_Z
};
552 lis3_dev
.idev
= input_allocate_polled_device();
556 lis3_dev
.idev
->poll
= lis3lv02d_joystick_poll
;
557 lis3_dev
.idev
->open
= lis3lv02d_joystick_open
;
558 lis3_dev
.idev
->close
= lis3lv02d_joystick_close
;
559 lis3_dev
.idev
->poll_interval
= MDPS_POLL_INTERVAL
;
560 lis3_dev
.idev
->poll_interval_min
= MDPS_POLL_MIN
;
561 lis3_dev
.idev
->poll_interval_max
= MDPS_POLL_MAX
;
562 input_dev
= lis3_dev
.idev
->input
;
564 input_dev
->name
= "ST LIS3LV02DL Accelerometer";
565 input_dev
->phys
= DRIVER_NAME
"/input0";
566 input_dev
->id
.bustype
= BUS_HOST
;
567 input_dev
->id
.vendor
= 0;
568 input_dev
->dev
.parent
= &lis3_dev
.pdev
->dev
;
570 set_bit(EV_ABS
, input_dev
->evbit
);
571 max_val
= (lis3_dev
.mdps_max_val
* lis3_dev
.scale
) / LIS3_ACCURACY
;
572 fuzz
= (LIS3_DEFAULT_FUZZ
* lis3_dev
.scale
) / LIS3_ACCURACY
;
573 flat
= (LIS3_DEFAULT_FLAT
* lis3_dev
.scale
) / LIS3_ACCURACY
;
574 input_set_abs_params(input_dev
, ABS_X
, -max_val
, max_val
, fuzz
, flat
);
575 input_set_abs_params(input_dev
, ABS_Y
, -max_val
, max_val
, fuzz
, flat
);
576 input_set_abs_params(input_dev
, ABS_Z
, -max_val
, max_val
, fuzz
, flat
);
578 lis3_dev
.mapped_btns
[0] = lis3lv02d_get_axis(abs(lis3_dev
.ac
.x
), btns
);
579 lis3_dev
.mapped_btns
[1] = lis3lv02d_get_axis(abs(lis3_dev
.ac
.y
), btns
);
580 lis3_dev
.mapped_btns
[2] = lis3lv02d_get_axis(abs(lis3_dev
.ac
.z
), btns
);
582 err
= input_register_polled_device(lis3_dev
.idev
);
584 input_free_polled_device(lis3_dev
.idev
);
585 lis3_dev
.idev
= NULL
;
590 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable
);
592 void lis3lv02d_joystick_disable(void)
595 free_irq(lis3_dev
.irq
, &lis3_dev
);
596 if (lis3_dev
.pdata
&& lis3_dev
.pdata
->irq2
)
597 free_irq(lis3_dev
.pdata
->irq2
, &lis3_dev
);
603 misc_deregister(&lis3lv02d_misc_device
);
604 input_unregister_polled_device(lis3_dev
.idev
);
605 input_free_polled_device(lis3_dev
.idev
);
606 lis3_dev
.idev
= NULL
;
608 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable
);
611 static void lis3lv02d_sysfs_poweron(struct lis3lv02d
*lis3
)
614 * SYSFS functions are fast visitors so put-call
615 * immediately after the get-call. However, keep
616 * chip running for a while and schedule delayed
617 * suspend. This way periodic sysfs calls doesn't
618 * suffer from relatively long power up time.
622 pm_runtime_get_sync(lis3
->pm_dev
);
623 pm_runtime_put_noidle(lis3
->pm_dev
);
624 pm_schedule_suspend(lis3
->pm_dev
, LIS3_SYSFS_POWERDOWN_DELAY
);
628 static ssize_t
lis3lv02d_selftest_show(struct device
*dev
,
629 struct device_attribute
*attr
, char *buf
)
634 lis3lv02d_sysfs_poweron(&lis3_dev
);
635 result
= lis3lv02d_selftest(&lis3_dev
, values
);
636 return sprintf(buf
, "%s %d %d %d\n", result
== 0 ? "OK" : "FAIL",
637 values
[0], values
[1], values
[2]);
640 static ssize_t
lis3lv02d_position_show(struct device
*dev
,
641 struct device_attribute
*attr
, char *buf
)
645 lis3lv02d_sysfs_poweron(&lis3_dev
);
646 mutex_lock(&lis3_dev
.mutex
);
647 lis3lv02d_get_xyz(&lis3_dev
, &x
, &y
, &z
);
648 mutex_unlock(&lis3_dev
.mutex
);
649 return sprintf(buf
, "(%d,%d,%d)\n", x
, y
, z
);
652 static ssize_t
lis3lv02d_rate_show(struct device
*dev
,
653 struct device_attribute
*attr
, char *buf
)
655 lis3lv02d_sysfs_poweron(&lis3_dev
);
656 return sprintf(buf
, "%d\n", lis3lv02d_get_odr());
659 static ssize_t
lis3lv02d_rate_set(struct device
*dev
,
660 struct device_attribute
*attr
, const char *buf
,
665 if (strict_strtoul(buf
, 0, &rate
))
668 lis3lv02d_sysfs_poweron(&lis3_dev
);
669 if (lis3lv02d_set_odr(rate
))
675 static DEVICE_ATTR(selftest
, S_IRUSR
, lis3lv02d_selftest_show
, NULL
);
676 static DEVICE_ATTR(position
, S_IRUGO
, lis3lv02d_position_show
, NULL
);
677 static DEVICE_ATTR(rate
, S_IRUGO
| S_IWUSR
, lis3lv02d_rate_show
,
680 static struct attribute
*lis3lv02d_attributes
[] = {
681 &dev_attr_selftest
.attr
,
682 &dev_attr_position
.attr
,
687 static struct attribute_group lis3lv02d_attribute_group
= {
688 .attrs
= lis3lv02d_attributes
692 static int lis3lv02d_add_fs(struct lis3lv02d
*lis3
)
694 lis3
->pdev
= platform_device_register_simple(DRIVER_NAME
, -1, NULL
, 0);
695 if (IS_ERR(lis3
->pdev
))
696 return PTR_ERR(lis3
->pdev
);
698 return sysfs_create_group(&lis3
->pdev
->dev
.kobj
, &lis3lv02d_attribute_group
);
701 int lis3lv02d_remove_fs(struct lis3lv02d
*lis3
)
703 sysfs_remove_group(&lis3
->pdev
->dev
.kobj
, &lis3lv02d_attribute_group
);
704 platform_device_unregister(lis3
->pdev
);
706 /* Barrier after the sysfs remove */
707 pm_runtime_barrier(lis3
->pm_dev
);
709 /* SYSFS may have left chip running. Turn off if necessary */
710 if (!pm_runtime_suspended(lis3
->pm_dev
))
711 lis3lv02d_poweroff(&lis3_dev
);
713 pm_runtime_disable(lis3
->pm_dev
);
714 pm_runtime_set_suspended(lis3
->pm_dev
);
716 kfree(lis3
->reg_cache
);
719 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs
);
721 static void lis3lv02d_8b_configure(struct lis3lv02d
*dev
,
722 struct lis3lv02d_platform_data
*p
)
725 int ctrl2
= p
->hipass_ctrl
;
727 if (p
->click_flags
) {
728 dev
->write(dev
, CLICK_CFG
, p
->click_flags
);
729 dev
->write(dev
, CLICK_TIMELIMIT
, p
->click_time_limit
);
730 dev
->write(dev
, CLICK_LATENCY
, p
->click_latency
);
731 dev
->write(dev
, CLICK_WINDOW
, p
->click_window
);
732 dev
->write(dev
, CLICK_THSZ
, p
->click_thresh_z
& 0xf);
733 dev
->write(dev
, CLICK_THSY_X
,
734 (p
->click_thresh_x
& 0xf) |
735 (p
->click_thresh_y
<< 4));
738 struct input_dev
*input_dev
= lis3_dev
.idev
->input
;
739 input_set_capability(input_dev
, EV_KEY
, BTN_X
);
740 input_set_capability(input_dev
, EV_KEY
, BTN_Y
);
741 input_set_capability(input_dev
, EV_KEY
, BTN_Z
);
745 if (p
->wakeup_flags
) {
746 dev
->write(dev
, FF_WU_CFG_1
, p
->wakeup_flags
);
747 dev
->write(dev
, FF_WU_THS_1
, p
->wakeup_thresh
& 0x7f);
748 /* default to 2.5ms for now */
749 dev
->write(dev
, FF_WU_DURATION_1
, 1);
750 ctrl2
^= HP_FF_WU1
; /* Xor to keep compatible with old pdata*/
753 if (p
->wakeup_flags2
) {
754 dev
->write(dev
, FF_WU_CFG_2
, p
->wakeup_flags2
);
755 dev
->write(dev
, FF_WU_THS_2
, p
->wakeup_thresh2
& 0x7f);
756 /* default to 2.5ms for now */
757 dev
->write(dev
, FF_WU_DURATION_2
, 1);
758 ctrl2
^= HP_FF_WU2
; /* Xor to keep compatible with old pdata*/
760 /* Configure hipass filters */
761 dev
->write(dev
, CTRL_REG2
, ctrl2
);
764 err
= request_threaded_irq(p
->irq2
,
766 lis302dl_interrupt_thread2_8b
,
767 IRQF_TRIGGER_RISING
|
769 DRIVER_NAME
, &lis3_dev
);
771 printk(KERN_ERR DRIVER_NAME
772 "No second IRQ. Limited functionality\n");
777 * Initialise the accelerometer and the various subsystems.
778 * Should be rather independent of the bus system.
780 int lis3lv02d_init_device(struct lis3lv02d
*dev
)
783 irq_handler_t thread_fn
;
785 dev
->whoami
= lis3lv02d_read_8(dev
, WHO_AM_I
);
787 switch (dev
->whoami
) {
789 printk(KERN_INFO DRIVER_NAME
": 12 bits sensor found\n");
790 dev
->read_data
= lis3lv02d_read_12
;
791 dev
->mdps_max_val
= 2048;
792 dev
->pwron_delay
= LIS3_PWRON_DELAY_WAI_12B
;
793 dev
->odrs
= lis3_12_rates
;
794 dev
->odr_mask
= CTRL1_DF0
| CTRL1_DF1
;
795 dev
->scale
= LIS3_SENSITIVITY_12B
;
796 dev
->regs
= lis3_wai12_regs
;
797 dev
->regs_size
= ARRAY_SIZE(lis3_wai12_regs
);
800 printk(KERN_INFO DRIVER_NAME
": 8 bits sensor found\n");
801 dev
->read_data
= lis3lv02d_read_8
;
802 dev
->mdps_max_val
= 128;
803 dev
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
804 dev
->odrs
= lis3_8_rates
;
805 dev
->odr_mask
= CTRL1_DR
;
806 dev
->scale
= LIS3_SENSITIVITY_8B
;
807 dev
->regs
= lis3_wai8_regs
;
808 dev
->regs_size
= ARRAY_SIZE(lis3_wai8_regs
);
811 printk(KERN_INFO DRIVER_NAME
": 8 bits 3DC sensor found\n");
812 dev
->read_data
= lis3lv02d_read_8
;
813 dev
->mdps_max_val
= 128;
814 dev
->pwron_delay
= LIS3_PWRON_DELAY_WAI_8B
;
815 dev
->odrs
= lis3_3dc_rates
;
816 dev
->odr_mask
= CTRL1_ODR0
|CTRL1_ODR1
|CTRL1_ODR2
|CTRL1_ODR3
;
817 dev
->scale
= LIS3_SENSITIVITY_8B
;
820 printk(KERN_ERR DRIVER_NAME
821 ": unknown sensor type 0x%X\n", dev
->whoami
);
825 dev
->reg_cache
= kzalloc(max(sizeof(lis3_wai8_regs
),
826 sizeof(lis3_wai12_regs
)), GFP_KERNEL
);
828 if (dev
->reg_cache
== NULL
) {
829 printk(KERN_ERR DRIVER_NAME
"out of memory\n");
833 mutex_init(&dev
->mutex
);
835 lis3lv02d_add_fs(dev
);
836 lis3lv02d_poweron(dev
);
839 pm_runtime_set_active(dev
->pm_dev
);
840 pm_runtime_enable(dev
->pm_dev
);
843 if (lis3lv02d_joystick_enable())
844 printk(KERN_ERR DRIVER_NAME
": joystick initialization failed\n");
846 /* passing in platform specific data is purely optional and only
847 * used by the SPI transport layer at the moment */
849 struct lis3lv02d_platform_data
*p
= dev
->pdata
;
851 if (dev
->whoami
== WAI_8B
)
852 lis3lv02d_8b_configure(dev
, p
);
855 dev
->write(dev
, CTRL_REG3
, p
->irq_cfg
);
858 /* bail if we did not get an IRQ from the bus layer */
860 printk(KERN_ERR DRIVER_NAME
861 ": No IRQ. Disabling /dev/freefall\n");
866 * The sensor can generate interrupts for free-fall and direction
867 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
868 * the things simple and _fast_ we activate it only for free-fall, so
869 * no need to read register (very slow with ACPI). For the same reason,
870 * we forbid shared interrupts.
872 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
873 * io-apic is not configurable (and generates a warning) but I keep it
874 * in case of support for other hardware.
876 if (dev
->pdata
&& dev
->whoami
== WAI_8B
)
877 thread_fn
= lis302dl_interrupt_thread1_8b
;
881 err
= request_threaded_irq(dev
->irq
, lis302dl_interrupt
,
883 IRQF_TRIGGER_RISING
| IRQF_ONESHOT
,
884 DRIVER_NAME
, &lis3_dev
);
887 printk(KERN_ERR DRIVER_NAME
"Cannot get IRQ\n");
891 if (misc_register(&lis3lv02d_misc_device
))
892 printk(KERN_ERR DRIVER_NAME
": misc_register failed\n");
896 EXPORT_SYMBOL_GPL(lis3lv02d_init_device
);
898 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
899 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
900 MODULE_LICENSE("GPL");