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_12B 3
75 #define LIS3_DEFAULT_FLAT_12B 3
76 #define LIS3_DEFAULT_FUZZ_8B 1
77 #define LIS3_DEFAULT_FLAT_8B 1
79 struct lis3lv02d lis3_dev = {
80 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
83 EXPORT_SYMBOL_GPL(lis3_dev);
85 /* just like param_set_int() but does sanity-check so that it won't point
86 * over the axis array size
88 static int param_set_axis(const char *val, const struct kernel_param *kp)
90 int ret = param_set_int(val, kp);
92 int val = *(int *)kp->arg;
101 static struct kernel_param_ops param_ops_axis = {
102 .set = param_set_axis,
103 .get = param_get_int,
106 module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
107 MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
109 static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
112 if (lis3->read(lis3, reg, &lo) < 0)
118 static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
122 lis3->read(lis3, reg - 1, &lo);
123 lis3->read(lis3, reg, &hi);
124 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
125 return (s16)((hi << 8) | lo);
129 * lis3lv02d_get_axis - For the given axis, give the value converted
130 * @axis: 1,2,3 - can also be negative
131 * @hw_values: raw values returned by the hardware
133 * Returns the converted value.
135 static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
138 return hw_values[axis - 1];
140 return -hw_values[-axis - 1];
144 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
145 * @lis3: pointer to the device struct
146 * @x: where to store the X axis value
147 * @y: where to store the Y axis value
148 * @z: where to store the Z axis value
150 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
152 static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
157 position[0] = lis3->read_data(lis3, OUTX);
158 position[1] = lis3->read_data(lis3, OUTY);
159 position[2] = lis3->read_data(lis3, OUTZ);
161 for (i = 0; i < 3; i++)
162 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
164 *x = lis3lv02d_get_axis(lis3->ac.x, position);
165 *y = lis3lv02d_get_axis(lis3->ac.y, position);
166 *z = lis3lv02d_get_axis(lis3->ac.z, position);
169 /* conversion btw sampling rate and the register values */
170 static int lis3_12_rates[4] = {40, 160, 640, 2560};
171 static int lis3_8_rates[2] = {100, 400};
172 static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
174 /* ODR is Output Data Rate */
175 static int lis3lv02d_get_odr(void)
180 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
181 ctrl &= lis3_dev.odr_mask;
182 shift = ffs(lis3_dev.odr_mask) - 1;
183 return lis3_dev.odrs[(ctrl >> shift)];
186 static int lis3lv02d_set_odr(int rate)
194 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
195 ctrl &= ~lis3_dev.odr_mask;
196 len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
197 shift = ffs(lis3_dev.odr_mask) - 1;
199 for (i = 0; i < len; i++)
200 if (lis3_dev.odrs[i] == rate) {
201 lis3_dev.write(&lis3_dev, CTRL_REG1,
202 ctrl | (i << shift));
208 static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
215 mutex_lock(&lis3->mutex);
216 if (lis3_dev.whoami == WAI_3DC) {
218 selftest = CTRL4_ST0;
221 if (lis3_dev.whoami == WAI_12B)
224 selftest = CTRL1_STP;
227 lis3->read(lis3, ctlreg, ®);
228 lis3->write(lis3, ctlreg, (reg | selftest));
229 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
231 /* Read directly to avoid axis remap */
232 x = lis3->read_data(lis3, OUTX);
233 y = lis3->read_data(lis3, OUTY);
234 z = lis3->read_data(lis3, OUTZ);
236 /* back to normal settings */
237 lis3->write(lis3, ctlreg, reg);
238 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
240 results[0] = x - lis3->read_data(lis3, OUTX);
241 results[1] = y - lis3->read_data(lis3, OUTY);
242 results[2] = z - lis3->read_data(lis3, OUTZ);
247 for (i = 0; i < 3; i++) {
248 /* Check against selftest acceptance limits */
249 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
250 (results[i] > lis3->pdata->st_max_limits[i])) {
259 mutex_unlock(&lis3->mutex);
264 * Order of registers in the list affects to order of the restore process.
265 * Perhaps it is a good idea to set interrupt enable register as a last one
266 * after all other configurations
268 static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
269 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
270 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
271 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
272 CTRL_REG1, CTRL_REG2, CTRL_REG3};
274 static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
275 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
276 DD_THSE_L, DD_THSE_H,
277 CTRL_REG1, CTRL_REG3, CTRL_REG2};
279 static inline void lis3_context_save(struct lis3lv02d *lis3)
282 for (i = 0; i < lis3->regs_size; i++)
283 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
284 lis3->regs_stored = true;
287 static inline void lis3_context_restore(struct lis3lv02d *lis3)
290 if (lis3->regs_stored)
291 for (i = 0; i < lis3->regs_size; i++)
292 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
295 void lis3lv02d_poweroff(struct lis3lv02d *lis3)
298 lis3_context_save(lis3);
299 /* disable X,Y,Z axis and power down */
300 lis3->write(lis3, CTRL_REG1, 0x00);
302 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
304 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
306 void lis3lv02d_poweron(struct lis3lv02d *lis3)
313 * Common configuration
314 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
315 * both have been read. So the value read will always be correct.
316 * Set BOOT bit to refresh factory tuning values.
318 lis3->read(lis3, CTRL_REG2, ®);
319 if (lis3->whoami == WAI_12B)
320 reg |= CTRL2_BDU | CTRL2_BOOT;
322 reg |= CTRL2_BOOT_8B;
323 lis3->write(lis3, CTRL_REG2, reg);
325 /* LIS3 power on delay is quite long */
326 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
329 lis3_context_restore(lis3);
331 EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
334 static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
338 mutex_lock(&lis3_dev.mutex);
339 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
340 input_report_abs(pidev->input, ABS_X, x);
341 input_report_abs(pidev->input, ABS_Y, y);
342 input_report_abs(pidev->input, ABS_Z, z);
343 input_sync(pidev->input);
344 mutex_unlock(&lis3_dev.mutex);
347 static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
350 pm_runtime_get_sync(lis3_dev.pm_dev);
352 if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev)
353 atomic_set(&lis3_dev.wake_thread, 1);
355 * Update coordinates for the case where poll interval is 0 and
356 * the chip in running purely under interrupt control
358 lis3lv02d_joystick_poll(pidev);
361 static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
363 atomic_set(&lis3_dev.wake_thread, 0);
365 pm_runtime_put(lis3_dev.pm_dev);
368 static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
370 if (!test_bit(0, &lis3_dev.misc_opened))
374 * Be careful: on some HP laptops the bios force DD when on battery and
375 * the lid is closed. This leads to interrupts as soon as a little move
378 atomic_inc(&lis3_dev.count);
380 wake_up_interruptible(&lis3_dev.misc_wait);
381 kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
383 if (atomic_read(&lis3_dev.wake_thread))
384 return IRQ_WAKE_THREAD;
388 static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
390 struct input_dev *dev = lis3->idev->input;
393 mutex_lock(&lis3->mutex);
394 lis3->read(lis3, CLICK_SRC, &click_src);
396 if (click_src & CLICK_SINGLE_X) {
397 input_report_key(dev, lis3->mapped_btns[0], 1);
398 input_report_key(dev, lis3->mapped_btns[0], 0);
401 if (click_src & CLICK_SINGLE_Y) {
402 input_report_key(dev, lis3->mapped_btns[1], 1);
403 input_report_key(dev, lis3->mapped_btns[1], 0);
406 if (click_src & CLICK_SINGLE_Z) {
407 input_report_key(dev, lis3->mapped_btns[2], 1);
408 input_report_key(dev, lis3->mapped_btns[2], 0);
411 mutex_unlock(&lis3->mutex);
414 static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
417 struct lis3lv02d *lis3 = data;
419 if ((lis3->irq_cfg & LIS3_IRQ1_MASK) == LIS3_IRQ1_CLICK)
420 lis302dl_interrupt_handle_click(lis3);
422 lis3lv02d_joystick_poll(lis3->idev);
427 static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
430 struct lis3lv02d *lis3 = data;
432 if ((lis3->irq_cfg & LIS3_IRQ2_MASK) == LIS3_IRQ2_CLICK)
433 lis302dl_interrupt_handle_click(lis3);
435 lis3lv02d_joystick_poll(lis3->idev);
440 static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
442 if (test_and_set_bit(0, &lis3_dev.misc_opened))
443 return -EBUSY; /* already open */
446 pm_runtime_get_sync(lis3_dev.pm_dev);
448 atomic_set(&lis3_dev.count, 0);
452 static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
454 fasync_helper(-1, file, 0, &lis3_dev.async_queue);
455 clear_bit(0, &lis3_dev.misc_opened); /* release the device */
457 pm_runtime_put(lis3_dev.pm_dev);
461 static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
462 size_t count, loff_t *pos)
464 DECLARE_WAITQUEUE(wait, current);
466 unsigned char byte_data;
472 add_wait_queue(&lis3_dev.misc_wait, &wait);
474 set_current_state(TASK_INTERRUPTIBLE);
475 data = atomic_xchg(&lis3_dev.count, 0);
479 if (file->f_flags & O_NONBLOCK) {
484 if (signal_pending(current)) {
485 retval = -ERESTARTSYS;
497 /* make sure we are not going into copy_to_user() with
498 * TASK_INTERRUPTIBLE state */
499 set_current_state(TASK_RUNNING);
500 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
504 __set_current_state(TASK_RUNNING);
505 remove_wait_queue(&lis3_dev.misc_wait, &wait);
510 static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
512 poll_wait(file, &lis3_dev.misc_wait, wait);
513 if (atomic_read(&lis3_dev.count))
514 return POLLIN | POLLRDNORM;
518 static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
520 return fasync_helper(fd, file, on, &lis3_dev.async_queue);
523 static const struct file_operations lis3lv02d_misc_fops = {
524 .owner = THIS_MODULE,
526 .read = lis3lv02d_misc_read,
527 .open = lis3lv02d_misc_open,
528 .release = lis3lv02d_misc_release,
529 .poll = lis3lv02d_misc_poll,
530 .fasync = lis3lv02d_misc_fasync,
533 static struct miscdevice lis3lv02d_misc_device = {
534 .minor = MISC_DYNAMIC_MINOR,
536 .fops = &lis3lv02d_misc_fops,
539 int lis3lv02d_joystick_enable(void)
541 struct input_dev *input_dev;
543 int max_val, fuzz, flat;
544 int btns[] = {BTN_X, BTN_Y, BTN_Z};
549 lis3_dev.idev = input_allocate_polled_device();
553 lis3_dev.idev->poll = lis3lv02d_joystick_poll;
554 lis3_dev.idev->open = lis3lv02d_joystick_open;
555 lis3_dev.idev->close = lis3lv02d_joystick_close;
556 lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
557 lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
558 lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
559 input_dev = lis3_dev.idev->input;
561 input_dev->name = "ST LIS3LV02DL Accelerometer";
562 input_dev->phys = DRIVER_NAME "/input0";
563 input_dev->id.bustype = BUS_HOST;
564 input_dev->id.vendor = 0;
565 input_dev->dev.parent = &lis3_dev.pdev->dev;
567 set_bit(EV_ABS, input_dev->evbit);
568 max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
569 if (lis3_dev.whoami == WAI_12B) {
570 fuzz = LIS3_DEFAULT_FUZZ_12B;
571 flat = LIS3_DEFAULT_FLAT_12B;
573 fuzz = LIS3_DEFAULT_FUZZ_8B;
574 flat = LIS3_DEFAULT_FLAT_8B;
576 fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
577 flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
579 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
580 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
581 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
583 lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns);
584 lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns);
585 lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns);
587 err = input_register_polled_device(lis3_dev.idev);
589 input_free_polled_device(lis3_dev.idev);
590 lis3_dev.idev = NULL;
595 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
597 void lis3lv02d_joystick_disable(void)
600 free_irq(lis3_dev.irq, &lis3_dev);
601 if (lis3_dev.pdata && lis3_dev.pdata->irq2)
602 free_irq(lis3_dev.pdata->irq2, &lis3_dev);
608 misc_deregister(&lis3lv02d_misc_device);
609 input_unregister_polled_device(lis3_dev.idev);
610 input_free_polled_device(lis3_dev.idev);
611 lis3_dev.idev = NULL;
613 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
616 static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
619 * SYSFS functions are fast visitors so put-call
620 * immediately after the get-call. However, keep
621 * chip running for a while and schedule delayed
622 * suspend. This way periodic sysfs calls doesn't
623 * suffer from relatively long power up time.
627 pm_runtime_get_sync(lis3->pm_dev);
628 pm_runtime_put_noidle(lis3->pm_dev);
629 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
633 static ssize_t lis3lv02d_selftest_show(struct device *dev,
634 struct device_attribute *attr, char *buf)
639 lis3lv02d_sysfs_poweron(&lis3_dev);
640 result = lis3lv02d_selftest(&lis3_dev, values);
641 return sprintf(buf, "%s %d %d %d\n", result == 0 ? "OK" : "FAIL",
642 values[0], values[1], values[2]);
645 static ssize_t lis3lv02d_position_show(struct device *dev,
646 struct device_attribute *attr, char *buf)
650 lis3lv02d_sysfs_poweron(&lis3_dev);
651 mutex_lock(&lis3_dev.mutex);
652 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
653 mutex_unlock(&lis3_dev.mutex);
654 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
657 static ssize_t lis3lv02d_rate_show(struct device *dev,
658 struct device_attribute *attr, char *buf)
660 lis3lv02d_sysfs_poweron(&lis3_dev);
661 return sprintf(buf, "%d\n", lis3lv02d_get_odr());
664 static ssize_t lis3lv02d_rate_set(struct device *dev,
665 struct device_attribute *attr, const char *buf,
670 if (strict_strtoul(buf, 0, &rate))
673 lis3lv02d_sysfs_poweron(&lis3_dev);
674 if (lis3lv02d_set_odr(rate))
680 static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
681 static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
682 static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
685 static struct attribute *lis3lv02d_attributes[] = {
686 &dev_attr_selftest.attr,
687 &dev_attr_position.attr,
692 static struct attribute_group lis3lv02d_attribute_group = {
693 .attrs = lis3lv02d_attributes
697 static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
699 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
700 if (IS_ERR(lis3->pdev))
701 return PTR_ERR(lis3->pdev);
703 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
706 int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
708 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
709 platform_device_unregister(lis3->pdev);
711 /* Barrier after the sysfs remove */
712 pm_runtime_barrier(lis3->pm_dev);
714 /* SYSFS may have left chip running. Turn off if necessary */
715 if (!pm_runtime_suspended(lis3->pm_dev))
716 lis3lv02d_poweroff(&lis3_dev);
718 pm_runtime_disable(lis3->pm_dev);
719 pm_runtime_set_suspended(lis3->pm_dev);
721 kfree(lis3->reg_cache);
724 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
726 static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
727 struct lis3lv02d_platform_data *p)
730 int ctrl2 = p->hipass_ctrl;
732 if (p->click_flags) {
733 dev->write(dev, CLICK_CFG, p->click_flags);
734 dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
735 dev->write(dev, CLICK_LATENCY, p->click_latency);
736 dev->write(dev, CLICK_WINDOW, p->click_window);
737 dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
738 dev->write(dev, CLICK_THSY_X,
739 (p->click_thresh_x & 0xf) |
740 (p->click_thresh_y << 4));
743 struct input_dev *input_dev = lis3_dev.idev->input;
744 input_set_capability(input_dev, EV_KEY, BTN_X);
745 input_set_capability(input_dev, EV_KEY, BTN_Y);
746 input_set_capability(input_dev, EV_KEY, BTN_Z);
750 if (p->wakeup_flags) {
751 dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
752 dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
753 /* pdata value + 1 to keep this backward compatible*/
754 dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
755 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
758 if (p->wakeup_flags2) {
759 dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
760 dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
761 /* pdata value + 1 to keep this backward compatible*/
762 dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
763 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
765 /* Configure hipass filters */
766 dev->write(dev, CTRL_REG2, ctrl2);
769 err = request_threaded_irq(p->irq2,
771 lis302dl_interrupt_thread2_8b,
772 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
773 (p->irq_flags2 & IRQF_TRIGGER_MASK),
774 DRIVER_NAME, &lis3_dev);
776 printk(KERN_ERR DRIVER_NAME
777 "No second IRQ. Limited functionality\n");
782 * Initialise the accelerometer and the various subsystems.
783 * Should be rather independent of the bus system.
785 int lis3lv02d_init_device(struct lis3lv02d *dev)
788 irq_handler_t thread_fn;
791 dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
793 switch (dev->whoami) {
795 printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n");
796 dev->read_data = lis3lv02d_read_12;
797 dev->mdps_max_val = 2048;
798 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
799 dev->odrs = lis3_12_rates;
800 dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
801 dev->scale = LIS3_SENSITIVITY_12B;
802 dev->regs = lis3_wai12_regs;
803 dev->regs_size = ARRAY_SIZE(lis3_wai12_regs);
806 printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n");
807 dev->read_data = lis3lv02d_read_8;
808 dev->mdps_max_val = 128;
809 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
810 dev->odrs = lis3_8_rates;
811 dev->odr_mask = CTRL1_DR;
812 dev->scale = LIS3_SENSITIVITY_8B;
813 dev->regs = lis3_wai8_regs;
814 dev->regs_size = ARRAY_SIZE(lis3_wai8_regs);
817 printk(KERN_INFO DRIVER_NAME ": 8 bits 3DC sensor found\n");
818 dev->read_data = lis3lv02d_read_8;
819 dev->mdps_max_val = 128;
820 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
821 dev->odrs = lis3_3dc_rates;
822 dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
823 dev->scale = LIS3_SENSITIVITY_8B;
826 printk(KERN_ERR DRIVER_NAME
827 ": unknown sensor type 0x%X\n", dev->whoami);
831 dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
832 sizeof(lis3_wai12_regs)), GFP_KERNEL);
834 if (dev->reg_cache == NULL) {
835 printk(KERN_ERR DRIVER_NAME "out of memory\n");
839 mutex_init(&dev->mutex);
840 atomic_set(&dev->wake_thread, 0);
842 lis3lv02d_add_fs(dev);
843 lis3lv02d_poweron(dev);
846 pm_runtime_set_active(dev->pm_dev);
847 pm_runtime_enable(dev->pm_dev);
850 if (lis3lv02d_joystick_enable())
851 printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
853 /* passing in platform specific data is purely optional and only
854 * used by the SPI transport layer at the moment */
856 struct lis3lv02d_platform_data *p = dev->pdata;
858 if (dev->whoami == WAI_8B)
859 lis3lv02d_8b_configure(dev, p);
861 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
863 dev->irq_cfg = p->irq_cfg;
865 dev->write(dev, CTRL_REG3, p->irq_cfg);
868 lis3lv02d_set_odr(p->default_rate);
871 /* bail if we did not get an IRQ from the bus layer */
873 printk(KERN_ERR DRIVER_NAME
874 ": No IRQ. Disabling /dev/freefall\n");
879 * The sensor can generate interrupts for free-fall and direction
880 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
881 * the things simple and _fast_ we activate it only for free-fall, so
882 * no need to read register (very slow with ACPI). For the same reason,
883 * we forbid shared interrupts.
885 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
886 * io-apic is not configurable (and generates a warning) but I keep it
887 * in case of support for other hardware.
889 if (dev->pdata && dev->whoami == WAI_8B)
890 thread_fn = lis302dl_interrupt_thread1_8b;
894 err = request_threaded_irq(dev->irq, lis302dl_interrupt,
896 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
898 DRIVER_NAME, &lis3_dev);
901 printk(KERN_ERR DRIVER_NAME "Cannot get IRQ\n");
905 if (misc_register(&lis3lv02d_misc_device))
906 printk(KERN_ERR DRIVER_NAME ": misc_register failed\n");
910 EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
912 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
913 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
914 MODULE_LICENSE("GPL");