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265 lines
7.3 KiB
265 lines
7.3 KiB
/*
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* hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
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*
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* Copyright (C) 2007-2008 Yan Burman
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* Copyright (C) 2008 Eric Piel
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* Copyright (C) 2008 Pavel Machek
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/dmi.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/kthread.h>
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#include <linux/semaphore.h>
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#include <linux/delay.h>
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#include <linux/wait.h>
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#include <linux/poll.h>
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#include <linux/freezer.h>
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#include <linux/version.h>
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#include <linux/uaccess.h>
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#include <acpi/acpi_drivers.h>
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#include <asm/atomic.h>
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#include "lis3lv02d.h"
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#define DRIVER_NAME "lis3lv02d"
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#define ACPI_MDPS_CLASS "accelerometer"
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/* For automatic insertion of the module */
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static struct acpi_device_id lis3lv02d_device_ids[] = {
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{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
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/**
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* lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
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* @handle: the handle of the device
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*
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* Returns AE_OK on success.
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*/
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acpi_status lis3lv02d_acpi_init(acpi_handle handle)
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{
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return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL);
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}
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/**
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* lis3lv02d_acpi_read - ACPI ALRD method: read a register
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* @handle: the handle of the device
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* @reg: the register to read
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* @ret: result of the operation
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*
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* Returns AE_OK on success.
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*/
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acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret)
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{
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union acpi_object arg0 = { ACPI_TYPE_INTEGER };
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struct acpi_object_list args = { 1, &arg0 };
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unsigned long long lret;
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acpi_status status;
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arg0.integer.value = reg;
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status = acpi_evaluate_integer(handle, "ALRD", &args, &lret);
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*ret = lret;
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return status;
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}
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/**
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* lis3lv02d_acpi_write - ACPI ALWR method: write to a register
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* @handle: the handle of the device
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* @reg: the register to write to
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* @val: the value to write
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*
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* Returns AE_OK on success.
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*/
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acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val)
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{
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unsigned long long ret; /* Not used when writting */
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union acpi_object in_obj[2];
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struct acpi_object_list args = { 2, in_obj };
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in_obj[0].type = ACPI_TYPE_INTEGER;
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in_obj[0].integer.value = reg;
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in_obj[1].type = ACPI_TYPE_INTEGER;
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in_obj[1].integer.value = val;
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return acpi_evaluate_integer(handle, "ALWR", &args, &ret);
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}
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static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
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{
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adev.ac = *((struct axis_conversion *)dmi->driver_data);
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printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
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return 1;
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}
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/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
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* If the value is negative, the opposite of the hw value is used. */
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static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
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static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
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static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
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static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
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static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
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static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
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#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
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.ident = _ident, \
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.callback = lis3lv02d_dmi_matched, \
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.matches = { \
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DMI_MATCH(DMI_PRODUCT_NAME, _name) \
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}, \
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.driver_data = &lis3lv02d_axis_##_axis \
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}
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static struct dmi_system_id lis3lv02d_dmi_ids[] = {
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/* product names are truncated to match all kinds of a same model */
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AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
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AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
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AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
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AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
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AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
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AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
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AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
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{ NULL, }
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/* Laptop models without axis info (yet):
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* "NC651xx" "HP Compaq 651"
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* "NC671xx" "HP Compaq 671"
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* "NC6910" "HP Compaq 6910"
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* HP Compaq 8710x Notebook PC / Mobile Workstation
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* "NC2400" "HP Compaq nc2400"
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* "NX74x0" "HP Compaq nx74"
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* "NX6325" "HP Compaq nx6325"
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* "NC4400" "HP Compaq nc4400"
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*/
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};
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static int lis3lv02d_add(struct acpi_device *device)
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{
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u8 val;
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if (!device)
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return -EINVAL;
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adev.device = device;
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adev.init = lis3lv02d_acpi_init;
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adev.read = lis3lv02d_acpi_read;
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adev.write = lis3lv02d_acpi_write;
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strcpy(acpi_device_name(device), DRIVER_NAME);
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strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
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device->driver_data = &adev;
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lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val);
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if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) {
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printk(KERN_ERR DRIVER_NAME
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": Accelerometer chip not LIS3LV02D{L,Q}\n");
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}
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/* If possible use a "standard" axes order */
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if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
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printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
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"using default axes configuration\n");
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adev.ac = lis3lv02d_axis_normal;
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}
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return lis3lv02d_init_device(&adev);
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}
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static int lis3lv02d_remove(struct acpi_device *device, int type)
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{
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if (!device)
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return -EINVAL;
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lis3lv02d_joystick_disable();
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lis3lv02d_poweroff(device->handle);
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return lis3lv02d_remove_fs();
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}
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#ifdef CONFIG_PM
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static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
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{
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/* make sure the device is off when we suspend */
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lis3lv02d_poweroff(device->handle);
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return 0;
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}
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static int lis3lv02d_resume(struct acpi_device *device)
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{
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/* put back the device in the right state (ACPI might turn it on) */
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mutex_lock(&adev.lock);
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if (adev.usage > 0)
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lis3lv02d_poweron(device->handle);
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else
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lis3lv02d_poweroff(device->handle);
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mutex_unlock(&adev.lock);
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return 0;
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}
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#else
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#define lis3lv02d_suspend NULL
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#define lis3lv02d_resume NULL
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#endif
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/* For the HP MDPS aka 3D Driveguard */
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static struct acpi_driver lis3lv02d_driver = {
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.name = DRIVER_NAME,
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.class = ACPI_MDPS_CLASS,
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.ids = lis3lv02d_device_ids,
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.ops = {
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.add = lis3lv02d_add,
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.remove = lis3lv02d_remove,
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.suspend = lis3lv02d_suspend,
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.resume = lis3lv02d_resume,
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}
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};
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static int __init lis3lv02d_init_module(void)
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{
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int ret;
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if (acpi_disabled)
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return -ENODEV;
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ret = acpi_bus_register_driver(&lis3lv02d_driver);
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if (ret < 0)
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return ret;
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printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
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return 0;
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}
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static void __exit lis3lv02d_exit_module(void)
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{
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acpi_bus_unregister_driver(&lis3lv02d_driver);
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}
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MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS");
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MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
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MODULE_LICENSE("GPL");
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module_init(lis3lv02d_init_module);
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module_exit(lis3lv02d_exit_module);
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