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 #define SELFTEST_FAIL -1
53 #define SELFTEST_IRQ -2
59 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
60 * because they are generated even if the data do not change. So it's better
61 * to keep the interrupt for the free-fall event. The values are updated at
62 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
63 * some low processor, we poll the sensor only at 20Hz... enough for the
67 #define LIS3_PWRON_DELAY_WAI_12B (5000)
68 #define LIS3_PWRON_DELAY_WAI_8B (3000)
71 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
72 * LIS302D spec says: 18 mG / digit
73 * LIS3_ACCURACY is used to increase accuracy of the intermediate
74 * calculation results.
76 #define LIS3_ACCURACY 1024
77 /* Sensitivity values for -2G +2G scale */
78 #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
79 #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
81 #define LIS3_DEFAULT_FUZZ_12B 3
82 #define LIS3_DEFAULT_FLAT_12B 3
83 #define LIS3_DEFAULT_FUZZ_8B 1
84 #define LIS3_DEFAULT_FLAT_8B 1
86 struct lis3lv02d lis3_dev = {
87 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
90 EXPORT_SYMBOL_GPL(lis3_dev);
92 /* just like param_set_int() but does sanity-check so that it won't point
93 * over the axis array size
95 static int param_set_axis(const char *val, const struct kernel_param *kp)
97 int ret = param_set_int(val, kp);
99 int val = *(int *)kp->arg;
108 static struct kernel_param_ops param_ops_axis = {
109 .set = param_set_axis,
110 .get = param_get_int,
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);
136 * lis3lv02d_get_axis - For the given axis, give the value converted
137 * @axis: 1,2,3 - can also be negative
138 * @hw_values: raw values returned by the hardware
140 * Returns the converted value.
142 static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
145 return hw_values[axis - 1];
147 return -hw_values[-axis - 1];
151 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
152 * @lis3: pointer to the device struct
153 * @x: where to store the X axis value
154 * @y: where to store the Y axis value
155 * @z: where to store the Z axis value
157 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
159 static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
165 if (lis3_dev.whoami == WAI_12B) {
167 lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
168 for (i = 0; i < 3; i++)
169 position[i] = (s16)le16_to_cpu(data[i]);
172 /* Data: x, dummy, y, dummy, z */
173 lis3->blkread(lis3, OUTX, 5, data);
174 for (i = 0; i < 3; i++)
175 position[i] = (s8)data[i * 2];
178 position[0] = lis3->read_data(lis3, OUTX);
179 position[1] = lis3->read_data(lis3, OUTY);
180 position[2] = lis3->read_data(lis3, OUTZ);
183 for (i = 0; i < 3; i++)
184 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
186 *x = lis3lv02d_get_axis(lis3->ac.x, position);
187 *y = lis3lv02d_get_axis(lis3->ac.y, position);
188 *z = lis3lv02d_get_axis(lis3->ac.z, position);
191 /* conversion btw sampling rate and the register values */
192 static int lis3_12_rates[4] = {40, 160, 640, 2560};
193 static int lis3_8_rates[2] = {100, 400};
194 static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
196 /* ODR is Output Data Rate */
197 static int lis3lv02d_get_odr(void)
202 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
203 ctrl &= lis3_dev.odr_mask;
204 shift = ffs(lis3_dev.odr_mask) - 1;
205 return lis3_dev.odrs[(ctrl >> shift)];
208 static int lis3lv02d_set_odr(int rate)
216 lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
217 ctrl &= ~lis3_dev.odr_mask;
218 len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
219 shift = ffs(lis3_dev.odr_mask) - 1;
221 for (i = 0; i < len; i++)
222 if (lis3_dev.odrs[i] == rate) {
223 lis3_dev.write(&lis3_dev, CTRL_REG1,
224 ctrl | (i << shift));
230 static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
237 unsigned char irq_cfg;
239 mutex_lock(&lis3->mutex);
241 irq_cfg = lis3->irq_cfg;
242 if (lis3_dev.whoami == WAI_8B) {
243 lis3->data_ready_count[IRQ_LINE0] = 0;
244 lis3->data_ready_count[IRQ_LINE1] = 0;
246 /* Change interrupt cfg to data ready for selftest */
247 atomic_inc(&lis3_dev.wake_thread);
248 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
249 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
250 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
251 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
252 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
255 if (lis3_dev.whoami == WAI_3DC) {
257 selftest = CTRL4_ST0;
260 if (lis3_dev.whoami == WAI_12B)
263 selftest = CTRL1_STP;
266 lis3->read(lis3, ctlreg, ®);
267 lis3->write(lis3, ctlreg, (reg | selftest));
268 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
270 /* Read directly to avoid axis remap */
271 x = lis3->read_data(lis3, OUTX);
272 y = lis3->read_data(lis3, OUTY);
273 z = lis3->read_data(lis3, OUTZ);
275 /* back to normal settings */
276 lis3->write(lis3, ctlreg, reg);
277 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
279 results[0] = x - lis3->read_data(lis3, OUTX);
280 results[1] = y - lis3->read_data(lis3, OUTY);
281 results[2] = z - lis3->read_data(lis3, OUTZ);
285 if (lis3_dev.whoami == WAI_8B) {
286 /* Restore original interrupt configuration */
287 atomic_dec(&lis3_dev.wake_thread);
288 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
289 lis3->irq_cfg = irq_cfg;
291 if ((irq_cfg & LIS3_IRQ1_MASK) &&
292 lis3->data_ready_count[IRQ_LINE0] < 2) {
297 if ((irq_cfg & LIS3_IRQ2_MASK) &&
298 lis3->data_ready_count[IRQ_LINE1] < 2) {
306 for (i = 0; i < 3; i++) {
307 /* Check against selftest acceptance limits */
308 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
309 (results[i] > lis3->pdata->st_max_limits[i])) {
318 mutex_unlock(&lis3->mutex);
323 * Order of registers in the list affects to order of the restore process.
324 * Perhaps it is a good idea to set interrupt enable register as a last one
325 * after all other configurations
327 static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
328 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
329 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
330 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
331 CTRL_REG1, CTRL_REG2, CTRL_REG3};
333 static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
334 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
335 DD_THSE_L, DD_THSE_H,
336 CTRL_REG1, CTRL_REG3, CTRL_REG2};
338 static inline void lis3_context_save(struct lis3lv02d *lis3)
341 for (i = 0; i < lis3->regs_size; i++)
342 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
343 lis3->regs_stored = true;
346 static inline void lis3_context_restore(struct lis3lv02d *lis3)
349 if (lis3->regs_stored)
350 for (i = 0; i < lis3->regs_size; i++)
351 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
354 void lis3lv02d_poweroff(struct lis3lv02d *lis3)
357 lis3_context_save(lis3);
358 /* disable X,Y,Z axis and power down */
359 lis3->write(lis3, CTRL_REG1, 0x00);
361 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
363 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
365 void lis3lv02d_poweron(struct lis3lv02d *lis3)
372 * Common configuration
373 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
374 * both have been read. So the value read will always be correct.
375 * Set BOOT bit to refresh factory tuning values.
377 lis3->read(lis3, CTRL_REG2, ®);
378 if (lis3->whoami == WAI_12B)
379 reg |= CTRL2_BDU | CTRL2_BOOT;
381 reg |= CTRL2_BOOT_8B;
382 lis3->write(lis3, CTRL_REG2, reg);
384 /* LIS3 power on delay is quite long */
385 msleep(lis3->pwron_delay / lis3lv02d_get_odr());
388 lis3_context_restore(lis3);
390 EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
393 static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
397 mutex_lock(&lis3_dev.mutex);
398 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
399 input_report_abs(pidev->input, ABS_X, x);
400 input_report_abs(pidev->input, ABS_Y, y);
401 input_report_abs(pidev->input, ABS_Z, z);
402 input_sync(pidev->input);
403 mutex_unlock(&lis3_dev.mutex);
406 static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
409 pm_runtime_get_sync(lis3_dev.pm_dev);
411 if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev)
412 atomic_set(&lis3_dev.wake_thread, 1);
414 * Update coordinates for the case where poll interval is 0 and
415 * the chip in running purely under interrupt control
417 lis3lv02d_joystick_poll(pidev);
420 static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
422 atomic_set(&lis3_dev.wake_thread, 0);
424 pm_runtime_put(lis3_dev.pm_dev);
427 static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
429 if (!test_bit(0, &lis3_dev.misc_opened))
433 * Be careful: on some HP laptops the bios force DD when on battery and
434 * the lid is closed. This leads to interrupts as soon as a little move
437 atomic_inc(&lis3_dev.count);
439 wake_up_interruptible(&lis3_dev.misc_wait);
440 kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
442 if (atomic_read(&lis3_dev.wake_thread))
443 return IRQ_WAKE_THREAD;
447 static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
449 struct input_dev *dev = lis3->idev->input;
452 mutex_lock(&lis3->mutex);
453 lis3->read(lis3, CLICK_SRC, &click_src);
455 if (click_src & CLICK_SINGLE_X) {
456 input_report_key(dev, lis3->mapped_btns[0], 1);
457 input_report_key(dev, lis3->mapped_btns[0], 0);
460 if (click_src & CLICK_SINGLE_Y) {
461 input_report_key(dev, lis3->mapped_btns[1], 1);
462 input_report_key(dev, lis3->mapped_btns[1], 0);
465 if (click_src & CLICK_SINGLE_Z) {
466 input_report_key(dev, lis3->mapped_btns[2], 1);
467 input_report_key(dev, lis3->mapped_btns[2], 0);
470 mutex_unlock(&lis3->mutex);
473 static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
477 /* Dummy read to ack interrupt */
478 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
479 lis3->data_ready_count[index]++;
482 static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
484 struct lis3lv02d *lis3 = data;
485 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
487 if (irq_cfg == LIS3_IRQ1_CLICK)
488 lis302dl_interrupt_handle_click(lis3);
489 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
490 lis302dl_data_ready(lis3, IRQ_LINE0);
492 lis3lv02d_joystick_poll(lis3->idev);
497 static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
499 struct lis3lv02d *lis3 = data;
500 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
502 if (irq_cfg == LIS3_IRQ2_CLICK)
503 lis302dl_interrupt_handle_click(lis3);
504 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
505 lis302dl_data_ready(lis3, IRQ_LINE1);
507 lis3lv02d_joystick_poll(lis3->idev);
512 static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
514 if (test_and_set_bit(0, &lis3_dev.misc_opened))
515 return -EBUSY; /* already open */
518 pm_runtime_get_sync(lis3_dev.pm_dev);
520 atomic_set(&lis3_dev.count, 0);
524 static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
526 fasync_helper(-1, file, 0, &lis3_dev.async_queue);
527 clear_bit(0, &lis3_dev.misc_opened); /* release the device */
529 pm_runtime_put(lis3_dev.pm_dev);
533 static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
534 size_t count, loff_t *pos)
536 DECLARE_WAITQUEUE(wait, current);
538 unsigned char byte_data;
544 add_wait_queue(&lis3_dev.misc_wait, &wait);
546 set_current_state(TASK_INTERRUPTIBLE);
547 data = atomic_xchg(&lis3_dev.count, 0);
551 if (file->f_flags & O_NONBLOCK) {
556 if (signal_pending(current)) {
557 retval = -ERESTARTSYS;
569 /* make sure we are not going into copy_to_user() with
570 * TASK_INTERRUPTIBLE state */
571 set_current_state(TASK_RUNNING);
572 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
576 __set_current_state(TASK_RUNNING);
577 remove_wait_queue(&lis3_dev.misc_wait, &wait);
582 static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
584 poll_wait(file, &lis3_dev.misc_wait, wait);
585 if (atomic_read(&lis3_dev.count))
586 return POLLIN | POLLRDNORM;
590 static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
592 return fasync_helper(fd, file, on, &lis3_dev.async_queue);
595 static const struct file_operations lis3lv02d_misc_fops = {
596 .owner = THIS_MODULE,
598 .read = lis3lv02d_misc_read,
599 .open = lis3lv02d_misc_open,
600 .release = lis3lv02d_misc_release,
601 .poll = lis3lv02d_misc_poll,
602 .fasync = lis3lv02d_misc_fasync,
605 static struct miscdevice lis3lv02d_misc_device = {
606 .minor = MISC_DYNAMIC_MINOR,
608 .fops = &lis3lv02d_misc_fops,
611 int lis3lv02d_joystick_enable(void)
613 struct input_dev *input_dev;
615 int max_val, fuzz, flat;
616 int btns[] = {BTN_X, BTN_Y, BTN_Z};
621 lis3_dev.idev = input_allocate_polled_device();
625 lis3_dev.idev->poll = lis3lv02d_joystick_poll;
626 lis3_dev.idev->open = lis3lv02d_joystick_open;
627 lis3_dev.idev->close = lis3lv02d_joystick_close;
628 lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
629 lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
630 lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
631 input_dev = lis3_dev.idev->input;
633 input_dev->name = "ST LIS3LV02DL Accelerometer";
634 input_dev->phys = DRIVER_NAME "/input0";
635 input_dev->id.bustype = BUS_HOST;
636 input_dev->id.vendor = 0;
637 input_dev->dev.parent = &lis3_dev.pdev->dev;
639 set_bit(EV_ABS, input_dev->evbit);
640 max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
641 if (lis3_dev.whoami == WAI_12B) {
642 fuzz = LIS3_DEFAULT_FUZZ_12B;
643 flat = LIS3_DEFAULT_FLAT_12B;
645 fuzz = LIS3_DEFAULT_FUZZ_8B;
646 flat = LIS3_DEFAULT_FLAT_8B;
648 fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
649 flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
651 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
652 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
653 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
655 lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns);
656 lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns);
657 lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns);
659 err = input_register_polled_device(lis3_dev.idev);
661 input_free_polled_device(lis3_dev.idev);
662 lis3_dev.idev = NULL;
667 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
669 void lis3lv02d_joystick_disable(void)
672 free_irq(lis3_dev.irq, &lis3_dev);
673 if (lis3_dev.pdata && lis3_dev.pdata->irq2)
674 free_irq(lis3_dev.pdata->irq2, &lis3_dev);
680 misc_deregister(&lis3lv02d_misc_device);
681 input_unregister_polled_device(lis3_dev.idev);
682 input_free_polled_device(lis3_dev.idev);
683 lis3_dev.idev = NULL;
685 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
688 static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
691 * SYSFS functions are fast visitors so put-call
692 * immediately after the get-call. However, keep
693 * chip running for a while and schedule delayed
694 * suspend. This way periodic sysfs calls doesn't
695 * suffer from relatively long power up time.
699 pm_runtime_get_sync(lis3->pm_dev);
700 pm_runtime_put_noidle(lis3->pm_dev);
701 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
705 static ssize_t lis3lv02d_selftest_show(struct device *dev,
706 struct device_attribute *attr, char *buf)
710 static const char ok[] = "OK";
711 static const char fail[] = "FAIL";
712 static const char irq[] = "FAIL_IRQ";
715 lis3lv02d_sysfs_poweron(&lis3_dev);
716 switch (lis3lv02d_selftest(&lis3_dev, values)) {
728 return sprintf(buf, "%s %d %d %d\n", res,
729 values[0], values[1], values[2]);
732 static ssize_t lis3lv02d_position_show(struct device *dev,
733 struct device_attribute *attr, char *buf)
737 lis3lv02d_sysfs_poweron(&lis3_dev);
738 mutex_lock(&lis3_dev.mutex);
739 lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
740 mutex_unlock(&lis3_dev.mutex);
741 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
744 static ssize_t lis3lv02d_rate_show(struct device *dev,
745 struct device_attribute *attr, char *buf)
747 lis3lv02d_sysfs_poweron(&lis3_dev);
748 return sprintf(buf, "%d\n", lis3lv02d_get_odr());
751 static ssize_t lis3lv02d_rate_set(struct device *dev,
752 struct device_attribute *attr, const char *buf,
757 if (strict_strtoul(buf, 0, &rate))
760 lis3lv02d_sysfs_poweron(&lis3_dev);
761 if (lis3lv02d_set_odr(rate))
767 static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
768 static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
769 static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
772 static struct attribute *lis3lv02d_attributes[] = {
773 &dev_attr_selftest.attr,
774 &dev_attr_position.attr,
779 static struct attribute_group lis3lv02d_attribute_group = {
780 .attrs = lis3lv02d_attributes
784 static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
786 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
787 if (IS_ERR(lis3->pdev))
788 return PTR_ERR(lis3->pdev);
790 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
793 int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
795 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
796 platform_device_unregister(lis3->pdev);
798 /* Barrier after the sysfs remove */
799 pm_runtime_barrier(lis3->pm_dev);
801 /* SYSFS may have left chip running. Turn off if necessary */
802 if (!pm_runtime_suspended(lis3->pm_dev))
803 lis3lv02d_poweroff(&lis3_dev);
805 pm_runtime_disable(lis3->pm_dev);
806 pm_runtime_set_suspended(lis3->pm_dev);
808 kfree(lis3->reg_cache);
811 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
813 static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
814 struct lis3lv02d_platform_data *p)
817 int ctrl2 = p->hipass_ctrl;
819 if (p->click_flags) {
820 dev->write(dev, CLICK_CFG, p->click_flags);
821 dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
822 dev->write(dev, CLICK_LATENCY, p->click_latency);
823 dev->write(dev, CLICK_WINDOW, p->click_window);
824 dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
825 dev->write(dev, CLICK_THSY_X,
826 (p->click_thresh_x & 0xf) |
827 (p->click_thresh_y << 4));
830 struct input_dev *input_dev = lis3_dev.idev->input;
831 input_set_capability(input_dev, EV_KEY, BTN_X);
832 input_set_capability(input_dev, EV_KEY, BTN_Y);
833 input_set_capability(input_dev, EV_KEY, BTN_Z);
837 if (p->wakeup_flags) {
838 dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
839 dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
840 /* pdata value + 1 to keep this backward compatible*/
841 dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
842 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
845 if (p->wakeup_flags2) {
846 dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
847 dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
848 /* pdata value + 1 to keep this backward compatible*/
849 dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
850 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
852 /* Configure hipass filters */
853 dev->write(dev, CTRL_REG2, ctrl2);
856 err = request_threaded_irq(p->irq2,
858 lis302dl_interrupt_thread2_8b,
859 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
860 (p->irq_flags2 & IRQF_TRIGGER_MASK),
861 DRIVER_NAME, &lis3_dev);
863 printk(KERN_ERR DRIVER_NAME
864 "No second IRQ. Limited functionality\n");
869 * Initialise the accelerometer and the various subsystems.
870 * Should be rather independent of the bus system.
872 int lis3lv02d_init_device(struct lis3lv02d *dev)
875 irq_handler_t thread_fn;
878 dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
880 switch (dev->whoami) {
882 printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n");
883 dev->read_data = lis3lv02d_read_12;
884 dev->mdps_max_val = 2048;
885 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
886 dev->odrs = lis3_12_rates;
887 dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
888 dev->scale = LIS3_SENSITIVITY_12B;
889 dev->regs = lis3_wai12_regs;
890 dev->regs_size = ARRAY_SIZE(lis3_wai12_regs);
893 printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n");
894 dev->read_data = lis3lv02d_read_8;
895 dev->mdps_max_val = 128;
896 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
897 dev->odrs = lis3_8_rates;
898 dev->odr_mask = CTRL1_DR;
899 dev->scale = LIS3_SENSITIVITY_8B;
900 dev->regs = lis3_wai8_regs;
901 dev->regs_size = ARRAY_SIZE(lis3_wai8_regs);
904 printk(KERN_INFO DRIVER_NAME ": 8 bits 3DC sensor found\n");
905 dev->read_data = lis3lv02d_read_8;
906 dev->mdps_max_val = 128;
907 dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
908 dev->odrs = lis3_3dc_rates;
909 dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
910 dev->scale = LIS3_SENSITIVITY_8B;
913 printk(KERN_ERR DRIVER_NAME
914 ": unknown sensor type 0x%X\n", dev->whoami);
918 dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
919 sizeof(lis3_wai12_regs)), GFP_KERNEL);
921 if (dev->reg_cache == NULL) {
922 printk(KERN_ERR DRIVER_NAME "out of memory\n");
926 mutex_init(&dev->mutex);
927 atomic_set(&dev->wake_thread, 0);
929 lis3lv02d_add_fs(dev);
930 lis3lv02d_poweron(dev);
933 pm_runtime_set_active(dev->pm_dev);
934 pm_runtime_enable(dev->pm_dev);
937 if (lis3lv02d_joystick_enable())
938 printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
940 /* passing in platform specific data is purely optional and only
941 * used by the SPI transport layer at the moment */
943 struct lis3lv02d_platform_data *p = dev->pdata;
945 if (dev->whoami == WAI_8B)
946 lis3lv02d_8b_configure(dev, p);
948 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
950 dev->irq_cfg = p->irq_cfg;
952 dev->write(dev, CTRL_REG3, p->irq_cfg);
955 lis3lv02d_set_odr(p->default_rate);
958 /* bail if we did not get an IRQ from the bus layer */
960 printk(KERN_ERR DRIVER_NAME
961 ": No IRQ. Disabling /dev/freefall\n");
966 * The sensor can generate interrupts for free-fall and direction
967 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
968 * the things simple and _fast_ we activate it only for free-fall, so
969 * no need to read register (very slow with ACPI). For the same reason,
970 * we forbid shared interrupts.
972 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
973 * io-apic is not configurable (and generates a warning) but I keep it
974 * in case of support for other hardware.
976 if (dev->pdata && dev->whoami == WAI_8B)
977 thread_fn = lis302dl_interrupt_thread1_8b;
981 err = request_threaded_irq(dev->irq, lis302dl_interrupt,
983 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
985 DRIVER_NAME, &lis3_dev);
988 printk(KERN_ERR DRIVER_NAME "Cannot get IRQ\n");
992 if (misc_register(&lis3lv02d_misc_device))
993 printk(KERN_ERR DRIVER_NAME ": misc_register failed\n");
997 EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
999 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1000 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1001 MODULE_LICENSE("GPL");