initial_commit

1 files changed, 1001 insertions, 0 deletions

diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c
new file mode 100644
index 00000000..8b51cd62
--- /dev/null
+++ b/drivers/misc/lis3lv02d/lis3lv02d.c
@@ -0,0 +1,1001 @@
+/*
+ *  lis3lv02d.c - ST LIS3LV02DL accelerometer driver
+ *
+ *  Copyright (C) 2007-2008 Yan Burman
+ *  Copyright (C) 2008 Eric Piel
+ *  Copyright (C) 2008-2009 Pavel Machek
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/dmi.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/input-polldev.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/freezer.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/pm_runtime.h>
+#include <linux/atomic.h>
+#include "lis3lv02d.h"
+
+#define DRIVER_NAME     "lis3lv02d"
+
+/* joystick device poll interval in milliseconds */
+#define MDPS_POLL_INTERVAL 50
+#define MDPS_POLL_MIN	   0
+#define MDPS_POLL_MAX	   2000
+
+#define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
+
+#define SELFTEST_OK	       0
+#define SELFTEST_FAIL	       -1
+#define SELFTEST_IRQ	       -2
+
+#define IRQ_LINE0	       0
+#define IRQ_LINE1	       1
+
+/*
+ * The sensor can also generate interrupts (DRDY) but it's pretty pointless
+ * because they are generated even if the data do not change. So it's better
+ * to keep the interrupt for the free-fall event. The values are updated at
+ * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
+ * some low processor, we poll the sensor only at 20Hz... enough for the
+ * joystick.
+ */
+
+#define LIS3_PWRON_DELAY_WAI_12B	(5000)
+#define LIS3_PWRON_DELAY_WAI_8B		(3000)
+
+/*
+ * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
+ * LIS302D spec says: 18 mG / digit
+ * LIS3_ACCURACY is used to increase accuracy of the intermediate
+ * calculation results.
+ */
+#define LIS3_ACCURACY			1024
+/* Sensitivity values for -2G +2G scale */
+#define LIS3_SENSITIVITY_12B		((LIS3_ACCURACY * 1000) / 1024)
+#define LIS3_SENSITIVITY_8B		(18 * LIS3_ACCURACY)
+
+#define LIS3_DEFAULT_FUZZ_12B		3
+#define LIS3_DEFAULT_FLAT_12B		3
+#define LIS3_DEFAULT_FUZZ_8B		1
+#define LIS3_DEFAULT_FLAT_8B		1
+
+struct lis3lv02d lis3_dev = {
+	.misc_wait   = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
+};
+EXPORT_SYMBOL_GPL(lis3_dev);
+
+/* just like param_set_int() but does sanity-check so that it won't point
+ * over the axis array size
+ */
+static int param_set_axis(const char *val, const struct kernel_param *kp)
+{
+	int ret = param_set_int(val, kp);
+	if (!ret) {
+		int val = *(int *)kp->arg;
+		if (val < 0)
+			val = -val;
+		if (!val || val > 3)
+			return -EINVAL;
+	}
+	return ret;
+}
+
+static struct kernel_param_ops param_ops_axis = {
+	.set = param_set_axis,
+	.get = param_get_int,
+};
+
+module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
+MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
+
+static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
+{
+	s8 lo;
+	if (lis3->read(lis3, reg, &lo) < 0)
+		return 0;
+
+	return lo;
+}
+
+static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
+{
+	u8 lo, hi;
+
+	lis3->read(lis3, reg - 1, &lo);
+	lis3->read(lis3, reg, &hi);
+	/* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
+	return (s16)((hi << 8) | lo);
+}
+
+/**
+ * lis3lv02d_get_axis - For the given axis, give the value converted
+ * @axis:      1,2,3 - can also be negative
+ * @hw_values: raw values returned by the hardware
+ *
+ * Returns the converted value.
+ */
+static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
+{
+	if (axis > 0)
+		return hw_values[axis - 1];
+	else
+		return -hw_values[-axis - 1];
+}
+
+/**
+ * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
+ * @lis3: pointer to the device struct
+ * @x:    where to store the X axis value
+ * @y:    where to store the Y axis value
+ * @z:    where to store the Z axis value
+ *
+ * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
+ */
+static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
+{
+	int position[3];
+	int i;
+
+	if (lis3->blkread) {
+		if (lis3_dev.whoami == WAI_12B) {
+			u16 data[3];
+			lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
+			for (i = 0; i < 3; i++)
+				position[i] = (s16)le16_to_cpu(data[i]);
+		} else {
+			u8 data[5];
+			/* Data: x, dummy, y, dummy, z */
+			lis3->blkread(lis3, OUTX, 5, data);
+			for (i = 0; i < 3; i++)
+				position[i] = (s8)data[i * 2];
+		}
+	} else {
+		position[0] = lis3->read_data(lis3, OUTX);
+		position[1] = lis3->read_data(lis3, OUTY);
+		position[2] = lis3->read_data(lis3, OUTZ);
+	}
+
+	for (i = 0; i < 3; i++)
+		position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
+
+	*x = lis3lv02d_get_axis(lis3->ac.x, position);
+	*y = lis3lv02d_get_axis(lis3->ac.y, position);
+	*z = lis3lv02d_get_axis(lis3->ac.z, position);
+}
+
+/* conversion btw sampling rate and the register values */
+static int lis3_12_rates[4] = {40, 160, 640, 2560};
+static int lis3_8_rates[2] = {100, 400};
+static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
+
+/* ODR is Output Data Rate */
+static int lis3lv02d_get_odr(void)
+{
+	u8 ctrl;
+	int shift;
+
+	lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
+	ctrl &= lis3_dev.odr_mask;
+	shift = ffs(lis3_dev.odr_mask) - 1;
+	return lis3_dev.odrs[(ctrl >> shift)];
+}
+
+static int lis3lv02d_set_odr(int rate)
+{
+	u8 ctrl;
+	int i, len, shift;
+
+	if (!rate)
+		return -EINVAL;
+
+	lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
+	ctrl &= ~lis3_dev.odr_mask;
+	len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
+	shift = ffs(lis3_dev.odr_mask) - 1;
+
+	for (i = 0; i < len; i++)
+		if (lis3_dev.odrs[i] == rate) {
+			lis3_dev.write(&lis3_dev, CTRL_REG1,
+					ctrl | (i << shift));
+			return 0;
+		}
+	return -EINVAL;
+}
+
+static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
+{
+	u8 ctlreg, reg;
+	s16 x, y, z;
+	u8 selftest;
+	int ret;
+	u8 ctrl_reg_data;
+	unsigned char irq_cfg;
+
+	mutex_lock(&lis3->mutex);
+
+	irq_cfg = lis3->irq_cfg;
+	if (lis3_dev.whoami == WAI_8B) {
+		lis3->data_ready_count[IRQ_LINE0] = 0;
+		lis3->data_ready_count[IRQ_LINE1] = 0;
+
+		/* Change interrupt cfg to data ready for selftest */
+		atomic_inc(&lis3_dev.wake_thread);
+		lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
+		lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
+		lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
+				~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
+				(LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
+	}
+
+	if (lis3_dev.whoami == WAI_3DC) {
+		ctlreg = CTRL_REG4;
+		selftest = CTRL4_ST0;
+	} else {
+		ctlreg = CTRL_REG1;
+		if (lis3_dev.whoami == WAI_12B)
+			selftest = CTRL1_ST;
+		else
+			selftest = CTRL1_STP;
+	}
+
+	lis3->read(lis3, ctlreg, &reg);
+	lis3->write(lis3, ctlreg, (reg | selftest));
+	msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+
+	/* Read directly to avoid axis remap */
+	x = lis3->read_data(lis3, OUTX);
+	y = lis3->read_data(lis3, OUTY);
+	z = lis3->read_data(lis3, OUTZ);
+
+	/* back to normal settings */
+	lis3->write(lis3, ctlreg, reg);
+	msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+
+	results[0] = x - lis3->read_data(lis3, OUTX);
+	results[1] = y - lis3->read_data(lis3, OUTY);
+	results[2] = z - lis3->read_data(lis3, OUTZ);
+
+	ret = 0;
+
+	if (lis3_dev.whoami == WAI_8B) {
+		/* Restore original interrupt configuration */
+		atomic_dec(&lis3_dev.wake_thread);
+		lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
+		lis3->irq_cfg = irq_cfg;
+
+		if ((irq_cfg & LIS3_IRQ1_MASK) &&
+			lis3->data_ready_count[IRQ_LINE0] < 2) {
+			ret = SELFTEST_IRQ;
+			goto fail;
+		}
+
+		if ((irq_cfg & LIS3_IRQ2_MASK) &&
+			lis3->data_ready_count[IRQ_LINE1] < 2) {
+			ret = SELFTEST_IRQ;
+			goto fail;
+		}
+	}
+
+	if (lis3->pdata) {
+		int i;
+		for (i = 0; i < 3; i++) {
+			/* Check against selftest acceptance limits */
+			if ((results[i] < lis3->pdata->st_min_limits[i]) ||
+			    (results[i] > lis3->pdata->st_max_limits[i])) {
+				ret = SELFTEST_FAIL;
+				goto fail;
+			}
+		}
+	}
+
+	/* test passed */
+fail:
+	mutex_unlock(&lis3->mutex);
+	return ret;
+}
+
+/*
+ * Order of registers in the list affects to order of the restore process.
+ * Perhaps it is a good idea to set interrupt enable register as a last one
+ * after all other configurations
+ */
+static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
+			       FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
+			       CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
+			       CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
+			       CTRL_REG1, CTRL_REG2, CTRL_REG3};
+
+static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
+			       FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
+			       DD_THSE_L, DD_THSE_H,
+			       CTRL_REG1, CTRL_REG3, CTRL_REG2};
+
+static inline void lis3_context_save(struct lis3lv02d *lis3)
+{
+	int i;
+	for (i = 0; i < lis3->regs_size; i++)
+		lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
+	lis3->regs_stored = true;
+}
+
+static inline void lis3_context_restore(struct lis3lv02d *lis3)
+{
+	int i;
+	if (lis3->regs_stored)
+		for (i = 0; i < lis3->regs_size; i++)
+			lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
+}
+
+void lis3lv02d_poweroff(struct lis3lv02d *lis3)
+{
+	if (lis3->reg_ctrl)
+		lis3_context_save(lis3);
+	/* disable X,Y,Z axis and power down */
+	lis3->write(lis3, CTRL_REG1, 0x00);
+	if (lis3->reg_ctrl)
+		lis3->reg_ctrl(lis3, LIS3_REG_OFF);
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
+
+void lis3lv02d_poweron(struct lis3lv02d *lis3)
+{
+	u8 reg;
+
+	lis3->init(lis3);
+
+	/*
+	 * Common configuration
+	 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
+	 *      both have been read. So the value read will always be correct.
+	 * Set BOOT bit to refresh factory tuning values.
+	 */
+	if (lis3->pdata) {
+		lis3->read(lis3, CTRL_REG2, &reg);
+		if (lis3->whoami ==  WAI_12B)
+			reg |= CTRL2_BDU | CTRL2_BOOT;
+		else
+			reg |= CTRL2_BOOT_8B;
+		lis3->write(lis3, CTRL_REG2, reg);
+	}
+
+	/* LIS3 power on delay is quite long */
+	msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+
+	if (lis3->reg_ctrl)
+		lis3_context_restore(lis3);
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
+
+
+static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
+{
+	int x, y, z;
+
+	mutex_lock(&lis3_dev.mutex);
+	lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
+	input_report_abs(pidev->input, ABS_X, x);
+	input_report_abs(pidev->input, ABS_Y, y);
+	input_report_abs(pidev->input, ABS_Z, z);
+	input_sync(pidev->input);
+	mutex_unlock(&lis3_dev.mutex);
+}
+
+static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
+{
+	if (lis3_dev.pm_dev)
+		pm_runtime_get_sync(lis3_dev.pm_dev);
+
+	if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev)
+		atomic_set(&lis3_dev.wake_thread, 1);
+	/*
+	 * Update coordinates for the case where poll interval is 0 and
+	 * the chip in running purely under interrupt control
+	 */
+	lis3lv02d_joystick_poll(pidev);
+}
+
+static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
+{
+	atomic_set(&lis3_dev.wake_thread, 0);
+	if (lis3_dev.pm_dev)
+		pm_runtime_put(lis3_dev.pm_dev);
+}
+
+static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
+{
+	if (!test_bit(0, &lis3_dev.misc_opened))
+		goto out;
+
+	/*
+	 * Be careful: on some HP laptops the bios force DD when on battery and
+	 * the lid is closed. This leads to interrupts as soon as a little move
+	 * is done.
+	 */
+	atomic_inc(&lis3_dev.count);
+
+	wake_up_interruptible(&lis3_dev.misc_wait);
+	kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
+out:
+	if (atomic_read(&lis3_dev.wake_thread))
+		return IRQ_WAKE_THREAD;
+	return IRQ_HANDLED;
+}
+
+static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
+{
+	struct input_dev *dev = lis3->idev->input;
+	u8 click_src;
+
+	mutex_lock(&lis3->mutex);
+	lis3->read(lis3, CLICK_SRC, &click_src);
+
+	if (click_src & CLICK_SINGLE_X) {
+		input_report_key(dev, lis3->mapped_btns[0], 1);
+		input_report_key(dev, lis3->mapped_btns[0], 0);
+	}
+
+	if (click_src & CLICK_SINGLE_Y) {
+		input_report_key(dev, lis3->mapped_btns[1], 1);
+		input_report_key(dev, lis3->mapped_btns[1], 0);
+	}
+
+	if (click_src & CLICK_SINGLE_Z) {
+		input_report_key(dev, lis3->mapped_btns[2], 1);
+		input_report_key(dev, lis3->mapped_btns[2], 0);
+	}
+	input_sync(dev);
+	mutex_unlock(&lis3->mutex);
+}
+
+static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
+{
+	int dummy;
+
+	/* Dummy read to ack interrupt */
+	lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
+	lis3->data_ready_count[index]++;
+}
+
+static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
+{
+	struct lis3lv02d *lis3 = data;
+	u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
+
+	if (irq_cfg == LIS3_IRQ1_CLICK)
+		lis302dl_interrupt_handle_click(lis3);
+	else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
+		lis302dl_data_ready(lis3, IRQ_LINE0);
+	else
+		lis3lv02d_joystick_poll(lis3->idev);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
+{
+	struct lis3lv02d *lis3 = data;
+	u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
+
+	if (irq_cfg == LIS3_IRQ2_CLICK)
+		lis302dl_interrupt_handle_click(lis3);
+	else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
+		lis302dl_data_ready(lis3, IRQ_LINE1);
+	else
+		lis3lv02d_joystick_poll(lis3->idev);
+
+	return IRQ_HANDLED;
+}
+
+static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
+{
+	if (test_and_set_bit(0, &lis3_dev.misc_opened))
+		return -EBUSY; /* already open */
+
+	if (lis3_dev.pm_dev)
+		pm_runtime_get_sync(lis3_dev.pm_dev);
+
+	atomic_set(&lis3_dev.count, 0);
+	return 0;
+}
+
+static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
+{
+	fasync_helper(-1, file, 0, &lis3_dev.async_queue);
+	clear_bit(0, &lis3_dev.misc_opened); /* release the device */
+	if (lis3_dev.pm_dev)
+		pm_runtime_put(lis3_dev.pm_dev);
+	return 0;
+}
+
+static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
+				size_t count, loff_t *pos)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	u32 data;
+	unsigned char byte_data;
+	ssize_t retval = 1;
+
+	if (count < 1)
+		return -EINVAL;
+
+	add_wait_queue(&lis3_dev.misc_wait, &wait);
+	while (true) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		data = atomic_xchg(&lis3_dev.count, 0);
+		if (data)
+			break;
+
+		if (file->f_flags & O_NONBLOCK) {
+			retval = -EAGAIN;
+			goto out;
+		}
+
+		if (signal_pending(current)) {
+			retval = -ERESTARTSYS;
+			goto out;
+		}
+
+		schedule();
+	}
+
+	if (data < 255)
+		byte_data = data;
+	else
+		byte_data = 255;
+
+	/* make sure we are not going into copy_to_user() with
+	 * TASK_INTERRUPTIBLE state */
+	set_current_state(TASK_RUNNING);
+	if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
+		retval = -EFAULT;
+
+out:
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(&lis3_dev.misc_wait, &wait);
+
+	return retval;
+}
+
+static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
+{
+	poll_wait(file, &lis3_dev.misc_wait, wait);
+	if (atomic_read(&lis3_dev.count))
+		return POLLIN | POLLRDNORM;
+	return 0;
+}
+
+static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
+{
+	return fasync_helper(fd, file, on, &lis3_dev.async_queue);
+}
+
+static const struct file_operations lis3lv02d_misc_fops = {
+	.owner   = THIS_MODULE,
+	.llseek  = no_llseek,
+	.read    = lis3lv02d_misc_read,
+	.open    = lis3lv02d_misc_open,
+	.release = lis3lv02d_misc_release,
+	.poll    = lis3lv02d_misc_poll,
+	.fasync  = lis3lv02d_misc_fasync,
+};
+
+static struct miscdevice lis3lv02d_misc_device = {
+	.minor   = MISC_DYNAMIC_MINOR,
+	.name    = "freefall",
+	.fops    = &lis3lv02d_misc_fops,
+};
+
+int lis3lv02d_joystick_enable(void)
+{
+	struct input_dev *input_dev;
+	int err;
+	int max_val, fuzz, flat;
+	int btns[] = {BTN_X, BTN_Y, BTN_Z};
+
+	if (lis3_dev.idev)
+		return -EINVAL;
+
+	lis3_dev.idev = input_allocate_polled_device();
+	if (!lis3_dev.idev)
+		return -ENOMEM;
+
+	lis3_dev.idev->poll = lis3lv02d_joystick_poll;
+	lis3_dev.idev->open = lis3lv02d_joystick_open;
+	lis3_dev.idev->close = lis3lv02d_joystick_close;
+	lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
+	lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
+	lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
+	input_dev = lis3_dev.idev->input;
+
+	input_dev->name       = "ST LIS3LV02DL Accelerometer";
+	input_dev->phys       = DRIVER_NAME "/input0";
+	input_dev->id.bustype = BUS_HOST;
+	input_dev->id.vendor  = 0;
+	input_dev->dev.parent = &lis3_dev.pdev->dev;
+
+	set_bit(EV_ABS, input_dev->evbit);
+	max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
+	if (lis3_dev.whoami == WAI_12B) {
+		fuzz = LIS3_DEFAULT_FUZZ_12B;
+		flat = LIS3_DEFAULT_FLAT_12B;
+	} else {
+		fuzz = LIS3_DEFAULT_FUZZ_8B;
+		flat = LIS3_DEFAULT_FLAT_8B;
+	}
+	fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
+	flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
+
+	input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
+	input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
+	input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
+
+	lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns);
+	lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns);
+	lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns);
+
+	err = input_register_polled_device(lis3_dev.idev);
+	if (err) {
+		input_free_polled_device(lis3_dev.idev);
+		lis3_dev.idev = NULL;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
+
+void lis3lv02d_joystick_disable(void)
+{
+	if (lis3_dev.irq)
+		free_irq(lis3_dev.irq, &lis3_dev);
+	if (lis3_dev.pdata && lis3_dev.pdata->irq2)
+		free_irq(lis3_dev.pdata->irq2, &lis3_dev);
+
+	if (!lis3_dev.idev)
+		return;
+
+	if (lis3_dev.irq)
+		misc_deregister(&lis3lv02d_misc_device);
+	input_unregister_polled_device(lis3_dev.idev);
+	input_free_polled_device(lis3_dev.idev);
+	lis3_dev.idev = NULL;
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
+
+/* Sysfs stuff */
+static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
+{
+	/*
+	 * SYSFS functions are fast visitors so put-call
+	 * immediately after the get-call. However, keep
+	 * chip running for a while and schedule delayed
+	 * suspend. This way periodic sysfs calls doesn't
+	 * suffer from relatively long power up time.
+	 */
+
+	if (lis3->pm_dev) {
+		pm_runtime_get_sync(lis3->pm_dev);
+		pm_runtime_put_noidle(lis3->pm_dev);
+		pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
+	}
+}
+
+static ssize_t lis3lv02d_selftest_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	s16 values[3];
+
+	static const char ok[] = "OK";
+	static const char fail[] = "FAIL";
+	static const char irq[] = "FAIL_IRQ";
+	const char *res;
+
+	lis3lv02d_sysfs_poweron(&lis3_dev);
+	switch (lis3lv02d_selftest(&lis3_dev, values)) {
+	case SELFTEST_FAIL:
+		res = fail;
+		break;
+	case SELFTEST_IRQ:
+		res = irq;
+		break;
+	case SELFTEST_OK:
+	default:
+		res = ok;
+		break;
+	}
+	return sprintf(buf, "%s %d %d %d\n", res,
+		values[0], values[1], values[2]);
+}
+
+static ssize_t lis3lv02d_position_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	int x, y, z;
+
+	lis3lv02d_sysfs_poweron(&lis3_dev);
+	mutex_lock(&lis3_dev.mutex);
+	lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
+	mutex_unlock(&lis3_dev.mutex);
+	return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
+}
+
+static ssize_t lis3lv02d_rate_show(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	lis3lv02d_sysfs_poweron(&lis3_dev);
+	return sprintf(buf, "%d\n", lis3lv02d_get_odr());
+}
+
+static ssize_t lis3lv02d_rate_set(struct device *dev,
+				struct device_attribute *attr, const char *buf,
+				size_t count)
+{
+	unsigned long rate;
+
+	if (strict_strtoul(buf, 0, &rate))
+		return -EINVAL;
+
+	lis3lv02d_sysfs_poweron(&lis3_dev);
+	if (lis3lv02d_set_odr(rate))
+		return -EINVAL;
+
+	return count;
+}
+
+static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
+static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
+static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
+					    lis3lv02d_rate_set);
+
+static struct attribute *lis3lv02d_attributes[] = {
+	&dev_attr_selftest.attr,
+	&dev_attr_position.attr,
+	&dev_attr_rate.attr,
+	NULL
+};
+
+static struct attribute_group lis3lv02d_attribute_group = {
+	.attrs = lis3lv02d_attributes
+};
+
+
+static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
+{
+	lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
+	if (IS_ERR(lis3->pdev))
+		return PTR_ERR(lis3->pdev);
+
+	return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
+}
+
+int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
+{
+	sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
+	platform_device_unregister(lis3->pdev);
+	if (lis3->pm_dev) {
+		/* Barrier after the sysfs remove */
+		pm_runtime_barrier(lis3->pm_dev);
+
+		/* SYSFS may have left chip running. Turn off if necessary */
+		if (!pm_runtime_suspended(lis3->pm_dev))
+			lis3lv02d_poweroff(&lis3_dev);
+
+		pm_runtime_disable(lis3->pm_dev);
+		pm_runtime_set_suspended(lis3->pm_dev);
+	}
+	kfree(lis3->reg_cache);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
+
+static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
+				struct lis3lv02d_platform_data *p)
+{
+	int err;
+	int ctrl2 = p->hipass_ctrl;
+
+	if (p->click_flags) {
+		dev->write(dev, CLICK_CFG, p->click_flags);
+		dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
+		dev->write(dev, CLICK_LATENCY, p->click_latency);
+		dev->write(dev, CLICK_WINDOW, p->click_window);
+		dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
+		dev->write(dev, CLICK_THSY_X,
+			(p->click_thresh_x & 0xf) |
+			(p->click_thresh_y << 4));
+
+		if (dev->idev) {
+			struct input_dev *input_dev = lis3_dev.idev->input;
+			input_set_capability(input_dev, EV_KEY, BTN_X);
+			input_set_capability(input_dev, EV_KEY, BTN_Y);
+			input_set_capability(input_dev, EV_KEY, BTN_Z);
+		}
+	}
+
+	if (p->wakeup_flags) {
+		dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
+		dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
+		/* pdata value + 1 to keep this backward compatible*/
+		dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
+		ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
+	}
+
+	if (p->wakeup_flags2) {
+		dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
+		dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
+		/* pdata value + 1 to keep this backward compatible*/
+		dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
+		ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
+	}
+	/* Configure hipass filters */
+	dev->write(dev, CTRL_REG2, ctrl2);
+
+	if (p->irq2) {
+		err = request_threaded_irq(p->irq2,
+					NULL,
+					lis302dl_interrupt_thread2_8b,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT |
+					(p->irq_flags2 & IRQF_TRIGGER_MASK),
+					DRIVER_NAME, &lis3_dev);
+		if (err < 0)
+			pr_err("No second IRQ. Limited functionality\n");
+	}
+}
+
+/*
+ * Initialise the accelerometer and the various subsystems.
+ * Should be rather independent of the bus system.
+ */
+int lis3lv02d_init_device(struct lis3lv02d *dev)
+{
+	int err;
+	irq_handler_t thread_fn;
+	int irq_flags = 0;
+
+	dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
+
+	switch (dev->whoami) {
+	case WAI_12B:
+		pr_info("12 bits sensor found\n");
+		dev->read_data = lis3lv02d_read_12;
+		dev->mdps_max_val = 2048;
+		dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
+		dev->odrs = lis3_12_rates;
+		dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
+		dev->scale = LIS3_SENSITIVITY_12B;
+		dev->regs = lis3_wai12_regs;
+		dev->regs_size = ARRAY_SIZE(lis3_wai12_regs);
+		break;
+	case WAI_8B:
+		pr_info("8 bits sensor found\n");
+		dev->read_data = lis3lv02d_read_8;
+		dev->mdps_max_val = 128;
+		dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
+		dev->odrs = lis3_8_rates;
+		dev->odr_mask = CTRL1_DR;
+		dev->scale = LIS3_SENSITIVITY_8B;
+		dev->regs = lis3_wai8_regs;
+		dev->regs_size = ARRAY_SIZE(lis3_wai8_regs);
+		break;
+	case WAI_3DC:
+		pr_info("8 bits 3DC sensor found\n");
+		dev->read_data = lis3lv02d_read_8;
+		dev->mdps_max_val = 128;
+		dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
+		dev->odrs = lis3_3dc_rates;
+		dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
+		dev->scale = LIS3_SENSITIVITY_8B;
+		break;
+	default:
+		pr_err("unknown sensor type 0x%X\n", dev->whoami);
+		return -EINVAL;
+	}
+
+	dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
+				     sizeof(lis3_wai12_regs)), GFP_KERNEL);
+
+	if (dev->reg_cache == NULL) {
+		printk(KERN_ERR DRIVER_NAME "out of memory\n");
+		return -ENOMEM;
+	}
+
+	mutex_init(&dev->mutex);
+	atomic_set(&dev->wake_thread, 0);
+
+	lis3lv02d_add_fs(dev);
+	lis3lv02d_poweron(dev);
+
+	if (dev->pm_dev) {
+		pm_runtime_set_active(dev->pm_dev);
+		pm_runtime_enable(dev->pm_dev);
+	}
+
+	if (lis3lv02d_joystick_enable())
+		pr_err("joystick initialization failed\n");
+
+	/* passing in platform specific data is purely optional and only
+	 * used by the SPI transport layer at the moment */
+	if (dev->pdata) {
+		struct lis3lv02d_platform_data *p = dev->pdata;
+
+		if (dev->whoami == WAI_8B)
+			lis3lv02d_8b_configure(dev, p);
+
+		irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
+
+		dev->irq_cfg = p->irq_cfg;
+		if (p->irq_cfg)
+			dev->write(dev, CTRL_REG3, p->irq_cfg);
+
+		if (p->default_rate)
+			lis3lv02d_set_odr(p->default_rate);
+	}
+
+	/* bail if we did not get an IRQ from the bus layer */
+	if (!dev->irq) {
+		pr_debug("No IRQ. Disabling /dev/freefall\n");
+		goto out;
+	}
+
+	/*
+	 * The sensor can generate interrupts for free-fall and direction
+	 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
+	 * the things simple and _fast_ we activate it only for free-fall, so
+	 * no need to read register (very slow with ACPI). For the same reason,
+	 * we forbid shared interrupts.
+	 *
+	 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
+	 * io-apic is not configurable (and generates a warning) but I keep it
+	 * in case of support for other hardware.
+	 */
+	if (dev->pdata && dev->whoami == WAI_8B)
+		thread_fn = lis302dl_interrupt_thread1_8b;
+	else
+		thread_fn = NULL;
+
+	err = request_threaded_irq(dev->irq, lis302dl_interrupt,
+				thread_fn,
+				IRQF_TRIGGER_RISING | IRQF_ONESHOT |
+				irq_flags,
+				DRIVER_NAME, &lis3_dev);
+
+	if (err < 0) {
+		pr_err("Cannot get IRQ\n");
+		goto out;
+	}
+
+	if (misc_register(&lis3lv02d_misc_device))
+		pr_err("misc_register failed\n");
+out:
+	return 0;
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
+
+MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
+MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
+MODULE_LICENSE("GPL");