Hi.
I finally got 2.6.19-rc2 to work on my laptop and it apparently fixed a bug
related
to MDPS's IRQ handling, so I was able to register the IRQ handler.
I created a newer version of my driver that can now act on interrupts
from the device instead of doing polling on the position that the
accelerometer
reports.
I wrote an interface that is still compatible with hdapsd + made a misc
device that acts similar to /dev/rtc - I also wrote a user space daemon
(it's very
easy now) that can print something like "your laptop is falling: press any
key to catch it"
whenever I drop it 10-15 cm and catch it.
Attached is the patch that applies to 2.6.18 and 2.6.19-rc{2,3}.
I didn't inline the patch, since hotmail screws it up.
Any comments are welcome.
Also, should I send it perhaps to the hwmon maintainer as well?
From: Alan Cox <[email protected]>
To: Burman Yan <[email protected]>
CC: [email protected], [email protected], [email protected],
[email protected], [email protected]
Subject: Re: [PATCH] HP mobile data protection system driver
Date: Fri, 13 Oct 2006 21:34:45 +0100
Ar Gwe, 2006-10-13 am 20:59 +0200, ysgrifennodd Burman Yan:
> I guess it may be a good idea after all to change the sysfs file it to
hdaps
> for now.
Perhaps it would be better to provide a new they all provide which
indicates 2 v 3 dimensions and also provides a scaled data source so
that you don't get confusion or have to adjust the daemon for each user.
If HDAPS is an IBM^WLeonovo mark thats another reason the final generic
file shouldn't be called HDAPS
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HP Mobile Data Protection System 3D ACPI driver. Similar to hdaps in functionality.
This driver provides 4 kinds of functionality:
1) Creates a misc device /dev/acel that acts similar to /dev/rtc and unblocks
the process reading from it when the device detects free-fall interrupt
2) Functions as an input class device to provide similar functionality to
hdaps, in order to be able to use the laptop as a joystick
3) Provides an interface similar to hdaps, so that hdapsd could work with it
4) A misc character device similar in interface to /dev/rtc that reacts on
free fall interrupts received from the device.
For comments mail to: [email protected]
Signed-off-by: Yan Burman <[email protected]>
diff -Nrubp linux-2.6.18.orig/drivers/hwmon/Kconfig linux-2.6.18.mdps/drivers/hwmon/Kconfig
--- linux-2.6.18.orig/drivers/hwmon/Kconfig 2006-10-11 14:20:08.000000000 +0200
+++ linux-2.6.18.mdps/drivers/hwmon/Kconfig 2006-11-02 21:13:41.000000000 +0200
@@ -507,6 +507,26 @@ config SENSORS_HDAPS
Say Y here if you have an applicable laptop and want to experience
the awesome power of hdaps.
+config SENSORS_MDPS
+ tristate "HP Mobile Data Protection System 3D (mdps)"
+ depends on ACPI && HWMON && INPUT && X86
+ default n
+ help
+ This driver provides support for the HP Mobile Data Protection
+ System 3D (mdps), which is an accelerometer. Only HP nc6400 and nc6420
+ is supported right now, but it may work on other models as well. The
+ accelerometer data is readable via /sys/devices/platform/mdps.
+
+ This driver also provides an absolute input class device, allowing
+ the laptop to act as a pinball machine-esque joystick.
+
+ Another feature of the driver is misc device called mdps that acts
+ similar to /dev/rtc and reacts on free-fall interrupts received from
+ the device.
+
+ This driver can also be built as a module. If so, the module
+ will be called mdps.
+
config HWMON_DEBUG_CHIP
bool "Hardware Monitoring Chip debugging messages"
depends on HWMON
diff -Nrubp linux-2.6.18.orig/drivers/hwmon/Makefile linux-2.6.18.mdps/drivers/hwmon/Makefile
--- linux-2.6.18.orig/drivers/hwmon/Makefile 2006-10-11 14:20:08.000000000 +0200
+++ linux-2.6.18.mdps/drivers/hwmon/Makefile 2006-10-13 10:14:10.000000000 +0200
@@ -26,6 +26,7 @@ obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
+obj-$(CONFIG_SENSORS_MDPS) += mdps.o
obj-$(CONFIG_SENSORS_IT87) += it87.o
obj-$(CONFIG_SENSORS_LM63) += lm63.o
obj-$(CONFIG_SENSORS_LM70) += lm70.o
diff -Nrubp linux-2.6.18.orig/drivers/hwmon/mdps.c linux-2.6.18.mdps/drivers/hwmon/mdps.c
--- linux-2.6.18.orig/drivers/hwmon/mdps.c 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.18.mdps/drivers/hwmon/mdps.c 2006-11-02 21:11:13.000000000 +0200
@@ -0,0 +1,689 @@
+/*
+ * mdps.c - HP Mobile Data Protection System 3D ACPI driver
+ *
+ * Copyright (C) 2006 Yan Burman
+ *
+ * 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
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/kthread.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <linux/miscdevice.h>
+
+#include <acpi/acpi_drivers.h>
+#include <acpi/acnamesp.h>
+
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+
+#define VERSION "0.4"
+
+#define DRIVER_NAME "mdps"
+#define ACPI_MDPS_CLASS "accelerometer"
+#define ACPI_MDPS_ID "HPQ0004"
+
+/* The actual chip is STMicroelectronics LIS3LV02DL or LIS3LV02DQ */
+
+#define MDPS_WHO_AM_I 0x0F /*r 00111010 */
+#define MDPS_OFFSET_X 0x16 /*rw */
+#define MDPS_OFFSET_Y 0x17 /*rw */
+#define MDPS_OFFSET_Z 0x18 /*rw */
+#define MDPS_GAIN_X 0x19 /*rw */
+#define MDPS_GAIN_Y 0x1A /*rw */
+#define MDPS_GAIN_Z 0x1B /*rw */
+#define MDPS_CTRL_REG1 0x20 /*rw 00000111 */
+#define MDPS_CTRL_REG2 0x21 /*rw 00000000 */
+#define MDPS_CTRL_REG3 0x22 /*rw 00001000 */
+#define MDPS_HP_FILTER RESET 0x23 /*r */
+#define MDPS_STATUS_REG 0x27 /*rw 00000000 */
+#define MDPS_OUTX_L 0x28 /*r */
+#define MDPS_OUTX_H 0x29 /*r */
+#define MDPS_OUTY_L 0x2A /*r */
+#define MDPS_OUTY_H 0x2B /*r */
+#define MDPS_OUTZ_L 0x2C /*r */
+#define MDPS_OUTZ_H 0x2D /*r */
+#define MDPS_FF_WU_CFG 0x30 /*rw 00000000 */
+#define MDPS_FF_WU_SRC 0x31 /*rw 00000000 */
+#define MDPS_FF_WU_ACK 0x32 /*r */
+#define MDPS_FF_WU_THS_L 0x34 /*rw 00000000 */
+#define MDPS_FF_WU_THS_H 0x35 /*rw 00000000 */
+#define MDPS_FF_WU_DURATION 0x36 /*rw 00000000 */
+#define MDPS_DD_CFG 0x38 /*rw 00000000 */
+#define MDPS_DD_SRC 0x39 /*rw 00000000 */
+#define MDPS_DD_ACK 0x3A /*r */
+#define MDPS_DD_THSI_L 0x3C /*rw 00000000 */
+#define MDPS_DD_THSI_H 0x3D /*rw 00000000 */
+#define MDPS_DD_THSE_L 0x3E /*rw 00000000 */
+#define MDPS_DD_THSE_H 0x3F /*rw 00000000 */
+
+#define MDPS_ID 0x3A
+
+/* mouse device poll interval in milliseconds */
+#define MDPS_POLL_INTERVAL 30
+
+static unsigned int mouse = 0;
+module_param(mouse, bool, S_IRUGO);
+MODULE_PARM_DESC(mouse, "Enable the input class device on module load");
+
+static unsigned int power_off = 0;
+module_param(power_off, bool, S_IRUGO);
+MODULE_PARM_DESC(power_off, "Turn off device on module load");
+
+struct acpi_mdps
+{
+ struct acpi_device* device; /* The ACPI device */
+ u32 irq; /* IRQ number */
+ struct input_dev* idev; /* input device */
+ struct task_struct* kthread; /* kthread for input */
+ int xcalib; /* calibrated null value for x */
+ int ycalib; /* calibrated null value for y */
+ int is_on; /* whether the device is on or off */
+ struct platform_device* pdev; /* platform device */
+ atomic_t count; /* how many times we got interrupts after the last read */
+ struct completion complete; /* we wait on this in read */
+ int reader_waiting;
+};
+
+static atomic_t mdps_available = ATOMIC_INIT(1);
+
+static struct acpi_mdps mdps;
+
+static int mdps_add(struct acpi_device *device);
+static int mdps_remove(struct acpi_device *device, int type);
+static int mdps_suspend(struct acpi_device * device, int state);
+static int mdps_resume(struct acpi_device * device, int state);
+static int mdps_remove_fs(void);
+static int mdps_add_fs(struct acpi_device *device);
+static void mdps_mouse_enable(void);
+static void mdps_mouse_disable(void);
+
+static struct acpi_driver mdps_driver =
+{
+ .name = DRIVER_NAME,
+ .class = ACPI_MDPS_CLASS,
+ .ids = ACPI_MDPS_ID,
+ .ops = {
+ .add = mdps_add,
+ .remove = mdps_remove,
+#ifdef CONFIG_PM
+ .suspend = mdps_suspend,
+ .resume = mdps_resume
+#endif
+ }
+};
+
+static DEFINE_SPINLOCK(mdps_lock);
+
+/** Create a single value from 2 bytes received from the accelerometer
+ * @param hi the high byte
+ * @param lo the low byte
+ * @return the resulting value
+ */
+static inline s16 mdps_glue_bytes(unsigned long hi, unsigned long lo)
+{
+ /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
+ if (hi & 0x10)
+ hi |= 0xE0;
+ return (s16)(lo | ((hi << 8)));
+}
+
+static acpi_status read_acpi_int_param(acpi_handle handle, acpi_string method,
+ int val, unsigned long* ret)
+{
+ union acpi_object arg0 = { ACPI_TYPE_INTEGER };
+ struct acpi_object_list args = { 1, &arg0 };
+
+ arg0.integer.value = val;
+
+ return acpi_evaluate_integer(handle, method, &args, ret);
+}
+
+/** ACPI _STA method: get device status
+ * @param handle the handle of the device
+ * @param[out] ret result of the operation
+ * @return AE_OK on success
+ */
+static inline acpi_status mdps__STA(acpi_handle handle, unsigned long* ret)
+{
+ return acpi_evaluate_integer(handle, METHOD_NAME__STA, NULL, ret);
+}
+
+/** ACPI ALRD method: read a register
+ * @param handle the handle of the device
+ * @param reg the register to read
+ * @param[out] ret result of the operation
+ * @return AE_OK on success
+ */
+static inline acpi_status mdps_ALRD(acpi_handle handle, int reg,
+ unsigned long* ret)
+{
+ return read_acpi_int_param(handle, "ALRD", reg, ret);
+}
+
+/** ACPI _INI method: initialize the device.
+ * @param handle the handle of the device
+ * @return 0 on success
+ */
+static inline acpi_status mdps__INI(acpi_handle handle)
+{
+ return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
+}
+
+/** ACPI ALWR method: write to a register
+ * @param handle the handle of the device
+ * @param reg the register to write to
+ * @param val the value to write
+ * @param[out] ret result of the operation
+ * @return AE_OK on success
+ */
+static acpi_status mdps_ALWR(acpi_handle handle, int reg, int val,
+ unsigned long* ret)
+{
+ union acpi_object in_obj[2];
+ struct acpi_object_list args;
+
+ args.count = 2;
+ args.pointer = in_obj;
+ in_obj[0].type = ACPI_TYPE_INTEGER;
+ in_obj[0].integer.value = reg;
+ in_obj[1].type = ACPI_TYPE_INTEGER;
+ in_obj[1].integer.value = val;
+
+ return acpi_evaluate_integer(handle, "ALWR", &args, ret);
+}
+
+static void mdps_get_xy(acpi_handle handle, int* x, int* y)
+{
+ unsigned long x_lo, x_hi, y_lo, y_hi;
+
+ mdps_ALRD(mdps.device->handle, MDPS_OUTX_L, &x_lo);
+ mdps_ALRD(mdps.device->handle, MDPS_OUTX_H, &x_hi);
+ mdps_ALRD(mdps.device->handle, MDPS_OUTY_L, &y_lo);
+ mdps_ALRD(mdps.device->handle, MDPS_OUTY_H, &y_hi);
+
+ *x = mdps_glue_bytes(x_hi, x_lo);
+ *y = mdps_glue_bytes(y_hi, y_lo);
+}
+
+/** Kthread polling function
+ * @param data unused - here to conform to threadfn prototype
+ * @return 0 unused - here to conform to threadfn prototype
+ */
+static int mdps_mouse_kthread(void *data)
+{
+ int x, y;
+
+ while (!kthread_should_stop()) {
+ mdps_get_xy(mdps.device->handle, &x, &y);
+
+ /* need to invert the X axis for this to look natural */
+ input_report_abs(mdps.idev, ABS_X, -(x - mdps.xcalib));
+ input_report_abs(mdps.idev, ABS_Y, y - mdps.ycalib);
+
+ input_sync(mdps.idev);
+
+ msleep(MDPS_POLL_INTERVAL);
+ }
+
+ return 0;
+}
+
+static inline void mdps_poweroff(acpi_handle handle)
+{
+ unsigned long ret;
+ mdps.is_on = 0;
+ mdps_ALWR(handle, MDPS_CTRL_REG1, 0x00, &ret);
+}
+
+static inline void mdps_poweron(acpi_handle handle)
+{
+ mdps.is_on = 1;
+ mdps__INI(handle);
+}
+
+#ifdef CONFIG_PM
+int mdps_suspend(struct acpi_device * device, int state)
+{
+ mdps_poweroff(mdps.device->handle);
+ mdps_mouse_disable();
+
+ return 0;
+}
+#endif
+
+int mdps_resume(struct acpi_device * device, int state)
+{
+ mdps_poweron(mdps.device->handle);
+
+ if (mouse)
+ mdps_mouse_enable();
+
+ return 0;
+}
+
+static irqreturn_t mdps_irq(int irq, void *dev_id)
+{
+ atomic_inc(&mdps.count);
+
+ spin_lock(&mdps_lock);
+ /* If we have a reader waiting, signal him */
+ if (mdps.reader_waiting) {
+ mdps.reader_waiting = 0;
+ complete(&mdps.complete);
+ }
+ spin_unlock(&mdps_lock);
+
+ return IRQ_HANDLED;
+}
+
+static int mdps_misc_release(struct inode *inode, struct file *file)
+{
+ atomic_inc(&mdps_available); /* release the device */
+ return 0;
+}
+
+static int mdps_misc_open(struct inode *inode, struct file *file)
+{
+ if (!atomic_dec_and_test(&mdps_available)) {
+ atomic_inc(&mdps_available);
+ return -EBUSY; /* already open */
+ }
+
+ atomic_set(&mdps.count, 0);
+ return 0;
+}
+
+static ssize_t mdps_misc_read(struct file *file, char __user *buf,
+ size_t count, loff_t *pos)
+{
+ u32 tmp;
+ int ret;
+ unsigned long flags;
+ u32* user_buf = (u32*)buf;
+
+ if (count != sizeof(u32))
+ return -EINVAL;
+
+ init_completion(&mdps.complete);
+
+ spin_lock_irqsave(&mdps_lock, flags);
+ mdps.reader_waiting = 1;
+ spin_unlock_irqrestore(&mdps_lock, flags);
+
+ ret = wait_for_completion_interruptible(&mdps.complete);
+ if (ret)
+ return ret;
+ tmp = atomic_read(&mdps.count);
+ atomic_set(&mdps.count, 0);
+
+ if (put_user(tmp, user_buf))
+ return -EFAULT;
+
+ return count;
+}
+
+static const struct file_operations mdps_misc_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = mdps_misc_read,
+ .open = mdps_misc_open,
+ .release = mdps_misc_release
+};
+
+static struct miscdevice mdps_misc_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "acel",
+ .fops = &mdps_misc_fops,
+};
+
+static acpi_status
+mdps_get_resource(struct acpi_resource *resource, void *context)
+{
+ if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
+ struct acpi_resource_extended_irq* irq;
+ u32* device_irq = context;
+
+ irq = &resource->data.extended_irq;
+ *device_irq = irq->interrupts[0];
+ }
+
+ return AE_OK;
+}
+
+static void mdps_enum_resources(struct acpi_device * device)
+{
+ acpi_status status;
+
+ status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+ mdps_get_resource, &mdps.irq);
+ if (ACPI_FAILURE(status))
+ printk(KERN_DEBUG "mdps: Error getting resources\n");
+}
+
+int mdps_add(struct acpi_device *device)
+{
+ unsigned long val;
+ int ret;
+
+ if (!device)
+ return -EINVAL;
+
+ mdps.device = device;
+ strcpy(acpi_device_name(device), DRIVER_NAME);
+ strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
+ acpi_driver_data(device) = &mdps;
+
+ mdps_ALRD(device->handle, MDPS_WHO_AM_I, &val);
+ if (val != MDPS_ID) {
+ printk(KERN_INFO "mdps: Accelerometer chip not LIS3LV02D{L,Q}\n");
+ return -ENODEV;
+ }
+
+ mdps_enum_resources(device);
+ mdps_add_fs(device);
+ mdps_resume(device, 3);
+
+ if (power_off)
+ mdps_poweroff(mdps.device->handle);
+
+ if (mdps.irq) {
+ ret = request_irq(mdps.irq, mdps_irq, 0, "mdps", mdps_irq);
+ if (ret) {
+ printk(KERN_INFO "mdps: (IRQ%d) allocation failed\n", mdps.irq);
+ mdps.irq = 0;
+ } else {
+ ret = misc_register(&mdps_misc_device);
+ if (ret) {
+ free_irq(mdps.irq, mdps_irq);
+ mdps.irq = 0;
+ printk(KERN_ERR "mdps: misc_register failed\n");
+ }
+ }
+ }
+
+ return 0;
+}
+
+int mdps_remove(struct acpi_device *device, int type)
+{
+ if (!device)
+ return -EINVAL;
+
+ if (mdps.irq) {
+ misc_deregister(&mdps_misc_device);
+ free_irq(mdps.irq, mdps_irq);
+ mdps.irq = 0;
+ }
+
+ if (mouse)
+ mdps_mouse_disable();
+
+ return mdps_remove_fs();
+}
+
+static void mdps_calibrate_mouse(void)
+{
+ int x, y;
+ mdps_get_xy(mdps.device->handle, &x, &y);
+
+ mdps.xcalib = x;
+ mdps.ycalib = y;
+}
+
+void mdps_mouse_enable(void)
+{
+ if (mdps.idev)
+ return;
+
+ mdps.idev = input_allocate_device();
+ if (!mdps.idev)
+ return;
+
+ mdps_calibrate_mouse();
+
+ mdps.idev->name = "HP Mobile Data Protection System";
+ mdps.idev->id.bustype = BUS_HOST;
+ mdps.idev->id.vendor = 0;
+
+ set_bit(EV_ABS, mdps.idev->evbit);
+ set_bit(EV_KEY, mdps.idev->evbit);
+
+ input_set_abs_params(mdps.idev, ABS_X, -2048, 2048, 3, 0);
+ input_set_abs_params(mdps.idev, ABS_Y, -2048, 2048, 3, 0);
+
+ if (input_register_device(mdps.idev)) {
+ input_free_device(mdps.idev);
+ mdps.idev = NULL;
+ return;
+ }
+
+ mdps.kthread = kthread_run(mdps_mouse_kthread, NULL, "kmdps");
+ if (IS_ERR(mdps.kthread)) {
+ input_unregister_device(mdps.idev);
+ mdps.idev = NULL;
+ return;
+ }
+
+ mouse = 1;
+}
+
+void mdps_mouse_disable(void)
+{
+ if (!mdps.idev)
+ return;
+
+ kthread_stop(mdps.kthread);
+
+ input_unregister_device(mdps.idev);
+ mdps.idev = NULL;
+}
+
+/* Sysfs stuff */
+static ssize_t mdps_position_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int x, y;
+ mdps_get_xy(mdps.device->handle, &x, &y);
+ return sprintf(buf, "(%d,%d)\n", x, y);
+}
+
+static ssize_t mdps_position3d_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long z_lo, z_hi;
+ int x, y, z;
+
+ mdps_get_xy(mdps.device->handle, &x, &y);
+
+ mdps_ALRD(mdps.device->handle, MDPS_OUTZ_L, &z_lo);
+ mdps_ALRD(mdps.device->handle, MDPS_OUTZ_H, &z_hi);
+ z = mdps_glue_bytes(z_hi, z_lo);
+
+ return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
+}
+
+static ssize_t mdps_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%s\n", (mdps.is_on ? "on" : "off"));
+}
+
+static ssize_t mdps_mouse_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%s\n", (mouse ? "enabled" : "disabled"));
+}
+
+static ssize_t mdps_calibrate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "(%d,%d)\n", mdps.xcalib, mdps.ycalib);
+}
+
+static ssize_t mdps_calibrate_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ mdps_calibrate_mouse();
+ return count;
+}
+
+static ssize_t mdps_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long ctrl;
+ int rate = 0;
+
+ mdps_ALRD(mdps.device->handle, MDPS_CTRL_REG1, &ctrl);
+
+ switch (ctrl & 0x30)
+ {
+ case 0x00:
+ rate = 40;
+ break;
+
+ case 0x10:
+ rate = 160;
+ break;
+
+ case 0x20:
+ rate = 640;
+ break;
+
+ case 0x30:
+ rate = 2560;
+ break;
+ }
+
+ return sprintf(buf, "%d\n", rate);
+}
+
+static ssize_t mdps_state_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int state;
+ if (sscanf(buf, "%d", &state) != 1 || (state != 1 && state != 0))
+ return -EINVAL;
+
+ mdps.is_on = state;
+
+ if (mdps.is_on)
+ mdps_poweron(mdps.device->handle);
+ else
+ mdps_poweroff(mdps.device->handle);
+
+ return count;
+}
+
+static ssize_t mdps_mouse_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ int tmp;
+ if (sscanf(buf, "%d", &tmp) != 1 || (tmp != 1 && tmp != 0))
+ return -EINVAL;
+
+ mouse = tmp;
+
+ if (mouse)
+ mdps_mouse_enable();
+ else
+ mdps_mouse_disable();
+
+ return count;
+}
+
+static DEVICE_ATTR(position, S_IRUGO, mdps_position_show, NULL);
+static DEVICE_ATTR(position3d, S_IRUGO, mdps_position3d_show, NULL);
+static DEVICE_ATTR(calibrate, S_IRUGO|S_IWUSR, mdps_calibrate_show, mdps_calibrate_store);
+static DEVICE_ATTR(rate, S_IRUGO, mdps_rate_show, NULL);
+static DEVICE_ATTR(state, S_IRUGO|S_IWUSR, mdps_state_show, mdps_state_store);
+static DEVICE_ATTR(mouse, S_IRUGO|S_IWUSR, mdps_mouse_show, mdps_mouse_store);
+
+static struct attribute *mdps_attributes[] = {
+ &dev_attr_position.attr,
+ &dev_attr_position3d.attr,
+ &dev_attr_calibrate.attr,
+ &dev_attr_rate.attr,
+ &dev_attr_state.attr,
+ &dev_attr_mouse.attr,
+ NULL
+};
+
+static struct attribute_group mdps_attribute_group = {
+ .attrs = mdps_attributes
+};
+
+int mdps_add_fs(struct acpi_device *device)
+{
+ mdps.pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
+ if (IS_ERR(mdps.pdev))
+ return PTR_ERR(mdps.pdev);
+
+ return sysfs_create_group(&mdps.pdev->dev.kobj, &mdps_attribute_group);
+}
+
+int mdps_remove_fs(void)
+{
+ sysfs_remove_group(&mdps.pdev->dev.kobj, &mdps_attribute_group);
+ platform_device_unregister(mdps.pdev);
+ return 0;
+}
+
+static int __init mdps_init_module(void)
+{
+ int ret;
+ acpi_status status;
+ acpi_handle handle = 0;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ /* device detection: see if our device is present */
+ status = acpi_get_handle(NULL, "\\_SB.C002.ACEL", &handle);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR "mdps: HP Mobile Data Protection System 3D device not found\n");
+ return -ENODEV;
+ }
+
+ ret = acpi_bus_register_driver(&mdps_driver);
+ if (ret < 0)
+ return ret;
+
+ printk(KERN_INFO "mdps: (" VERSION ") loaded.\n");
+
+ return 0;
+}
+
+static void __exit mdps_exit_module(void)
+{
+ acpi_bus_unregister_driver(&mdps_driver);
+}
+
+MODULE_DESCRIPTION("HP three-axis digital accelerometer ACPI driver");
+MODULE_AUTHOR("Yan Burman ([email protected])");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+
+module_init(mdps_init_module);
+module_exit(mdps_exit_module);
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