431 lines
12 KiB
C
431 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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) 2008-2009 Pavel Machek
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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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/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/uaccess.h>
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#include <linux/leds.h>
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#include <linux/atomic.h>
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#include <linux/acpi.h>
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#include <linux/i8042.h>
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#include <linux/serio.h>
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#include "../../misc/lis3lv02d/lis3lv02d.h"
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#define DRIVER_NAME "hp_accel"
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#define ACPI_MDPS_CLASS "accelerometer"
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/* Delayed LEDs infrastructure ------------------------------------ */
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/* Special LED class that can defer work */
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struct delayed_led_classdev {
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struct led_classdev led_classdev;
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struct work_struct work;
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enum led_brightness new_brightness;
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unsigned int led; /* For driver */
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void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
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};
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static inline void delayed_set_status_worker(struct work_struct *work)
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{
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struct delayed_led_classdev *data =
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container_of(work, struct delayed_led_classdev, work);
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data->set_brightness(data, data->new_brightness);
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}
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static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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struct delayed_led_classdev *data = container_of(led_cdev,
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struct delayed_led_classdev, led_classdev);
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data->new_brightness = brightness;
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schedule_work(&data->work);
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}
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/* HP-specific accelerometer driver ------------------------------------ */
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/* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
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* HPQ6000 sends through the keyboard bus */
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#define ACCEL_1 0x25
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#define ACCEL_2 0x26
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#define ACCEL_3 0x27
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#define ACCEL_4 0x28
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/* For automatic insertion of the module */
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static const struct acpi_device_id lis3lv02d_device_ids[] = {
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{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
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{"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
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{"HPQ6007", 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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* @lis3: pointer to the device struct
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*
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* Returns 0 on success.
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*/
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static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
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{
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struct acpi_device *dev = lis3->bus_priv;
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if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
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NULL, NULL) != AE_OK)
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return -EINVAL;
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return 0;
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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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* @lis3: pointer to the device struct
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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 0 on success.
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*/
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static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
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{
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struct acpi_device *dev = lis3->bus_priv;
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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(dev->handle, "ALRD", &args, &lret);
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if (ACPI_FAILURE(status))
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return -EINVAL;
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*ret = lret;
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return 0;
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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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* @lis3: pointer to the device struct
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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 0 on success.
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*/
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static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
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{
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struct acpi_device *dev = lis3->bus_priv;
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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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if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
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return -EINVAL;
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return 0;
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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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lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
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pr_info("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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#define DEFINE_CONV(name, x, y, z) \
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static union axis_conversion lis3lv02d_axis_##name = \
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{ .as_array = { x, y, z } }
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DEFINE_CONV(normal, 1, 2, 3);
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DEFINE_CONV(y_inverted, 1, -2, 3);
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DEFINE_CONV(x_inverted, -1, 2, 3);
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DEFINE_CONV(x_inverted_usd, -1, 2, -3);
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DEFINE_CONV(z_inverted, 1, 2, -3);
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DEFINE_CONV(xy_swap, 2, 1, 3);
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DEFINE_CONV(xy_rotated_left, -2, 1, 3);
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DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
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DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
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DEFINE_CONV(xy_rotated_right, 2, -1, 3);
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DEFINE_CONV(xy_swap_yz_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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#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
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_class2, _name2, \
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_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_##_class1, _name1), \
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DMI_MATCH(DMI_##_class2, _name2), \
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}, \
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.driver_data = &lis3lv02d_axis_##_axis \
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}
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static const 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("NC2710", "HP Compaq 2710", xy_swap),
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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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AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
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AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
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AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
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AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
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AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
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AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
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AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
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AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
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AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
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AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
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AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
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/* Intel-based HP Pavilion dv5 */
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AXIS_DMI_MATCH2("HPDV5_I",
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PRODUCT_NAME, "HP Pavilion dv5",
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BOARD_NAME, "3603",
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x_inverted),
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/* AMD-based HP Pavilion dv5 */
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AXIS_DMI_MATCH2("HPDV5_A",
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PRODUCT_NAME, "HP Pavilion dv5",
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BOARD_NAME, "3600",
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y_inverted),
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AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
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AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
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AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
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AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
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AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
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AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
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AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
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AXIS_DMI_MATCH("HPB450G0", "HP ProBook 450 G0", x_inverted),
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AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
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AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
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AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
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AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
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AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
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AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
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AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
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AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
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AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
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AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
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AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
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{ NULL, }
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/* Laptop models without axis info (yet):
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* "NC6910" "HP Compaq 6910"
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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 void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
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{
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struct acpi_device *dev = lis3_dev.bus_priv;
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unsigned long long ret; /* Not used when writing */
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union acpi_object in_obj[1];
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struct acpi_object_list args = { 1, in_obj };
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in_obj[0].type = ACPI_TYPE_INTEGER;
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in_obj[0].integer.value = !!value;
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acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
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}
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static struct delayed_led_classdev hpled_led = {
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.led_classdev = {
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.name = "hp::hddprotect",
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.default_trigger = "none",
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.brightness_set = delayed_sysfs_set,
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.flags = LED_CORE_SUSPENDRESUME,
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},
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.set_brightness = hpled_set,
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};
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static acpi_status
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lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
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{
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if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
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struct acpi_resource_extended_irq *irq;
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u32 *device_irq = context;
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irq = &resource->data.extended_irq;
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*device_irq = irq->interrupts[0];
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}
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return AE_OK;
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}
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static void lis3lv02d_enum_resources(struct acpi_device *device)
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{
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acpi_status status;
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status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
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lis3lv02d_get_resource, &lis3_dev.irq);
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if (ACPI_FAILURE(status))
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printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
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}
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static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
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struct serio *port)
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{
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static bool extended;
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if (str & I8042_STR_AUXDATA)
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return false;
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if (data == 0xe0) {
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extended = true;
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return true;
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} else if (unlikely(extended)) {
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extended = false;
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switch (data) {
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case ACCEL_1:
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case ACCEL_2:
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case ACCEL_3:
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case ACCEL_4:
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return true;
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default:
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serio_interrupt(port, 0xe0, 0);
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return false;
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}
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}
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return false;
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}
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static int lis3lv02d_add(struct acpi_device *device)
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{
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int ret;
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if (!device)
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return -EINVAL;
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lis3_dev.bus_priv = device;
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lis3_dev.init = lis3lv02d_acpi_init;
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lis3_dev.read = lis3lv02d_acpi_read;
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lis3_dev.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 = &lis3_dev;
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/* obtain IRQ number of our device from ACPI */
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lis3lv02d_enum_resources(device);
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/* If possible use a "standard" axes order */
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if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
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pr_info("Using custom axes %d,%d,%d\n",
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lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
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} else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
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pr_info("laptop model unknown, using default axes configuration\n");
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lis3_dev.ac = lis3lv02d_axis_normal;
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}
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/* call the core layer do its init */
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ret = lis3lv02d_init_device(&lis3_dev);
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if (ret)
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return ret;
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/* filter to remove HPQ6000 accelerometer data
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* from keyboard bus stream */
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if (strstr(dev_name(&device->dev), "HPQ6000"))
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i8042_install_filter(hp_accel_i8042_filter);
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INIT_WORK(&hpled_led.work, delayed_set_status_worker);
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ret = led_classdev_register(NULL, &hpled_led.led_classdev);
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if (ret) {
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lis3lv02d_joystick_disable(&lis3_dev);
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lis3lv02d_poweroff(&lis3_dev);
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flush_work(&hpled_led.work);
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return ret;
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}
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return ret;
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}
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static int lis3lv02d_remove(struct acpi_device *device)
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{
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if (!device)
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return -EINVAL;
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i8042_remove_filter(hp_accel_i8042_filter);
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lis3lv02d_joystick_disable(&lis3_dev);
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lis3lv02d_poweroff(&lis3_dev);
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led_classdev_unregister(&hpled_led.led_classdev);
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flush_work(&hpled_led.work);
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return lis3lv02d_remove_fs(&lis3_dev);
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}
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#ifdef CONFIG_PM_SLEEP
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static int lis3lv02d_suspend(struct device *dev)
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{
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/* make sure the device is off when we suspend */
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lis3lv02d_poweroff(&lis3_dev);
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return 0;
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}
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static int lis3lv02d_resume(struct device *dev)
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{
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lis3lv02d_poweron(&lis3_dev);
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
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#define HP_ACCEL_PM (&hp_accel_pm)
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#else
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#define HP_ACCEL_PM 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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},
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.drv.pm = HP_ACCEL_PM,
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};
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module_acpi_driver(lis3lv02d_driver);
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MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
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MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
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MODULE_LICENSE("GPL");
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