| /* |
| * hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS |
| * |
| * 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/delay.h> |
| #include <linux/wait.h> |
| #include <linux/poll.h> |
| #include <linux/freezer.h> |
| #include <linux/uaccess.h> |
| #include <linux/leds.h> |
| #include <linux/atomic.h> |
| #include <acpi/acpi_drivers.h> |
| #include "../../misc/lis3lv02d/lis3lv02d.h" |
| |
| #define DRIVER_NAME "hp_accel" |
| #define ACPI_MDPS_CLASS "accelerometer" |
| |
| /* Delayed LEDs infrastructure ------------------------------------ */ |
| |
| /* Special LED class that can defer work */ |
| struct delayed_led_classdev { |
| struct led_classdev led_classdev; |
| struct work_struct work; |
| enum led_brightness new_brightness; |
| |
| unsigned int led; /* For driver */ |
| void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value); |
| }; |
| |
| static inline void delayed_set_status_worker(struct work_struct *work) |
| { |
| struct delayed_led_classdev *data = |
| container_of(work, struct delayed_led_classdev, work); |
| |
| data->set_brightness(data, data->new_brightness); |
| } |
| |
| static inline void delayed_sysfs_set(struct led_classdev *led_cdev, |
| enum led_brightness brightness) |
| { |
| struct delayed_led_classdev *data = container_of(led_cdev, |
| struct delayed_led_classdev, led_classdev); |
| data->new_brightness = brightness; |
| schedule_work(&data->work); |
| } |
| |
| /* HP-specific accelerometer driver ------------------------------------ */ |
| |
| /* For automatic insertion of the module */ |
| static struct acpi_device_id lis3lv02d_device_ids[] = { |
| {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ |
| {"", 0}, |
| }; |
| MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); |
| |
| |
| /** |
| * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. |
| * @lis3: pointer to the device struct |
| * |
| * Returns 0 on success. |
| */ |
| int lis3lv02d_acpi_init(struct lis3lv02d *lis3) |
| { |
| struct acpi_device *dev = lis3->bus_priv; |
| if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI, |
| NULL, NULL) != AE_OK) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| /** |
| * lis3lv02d_acpi_read - ACPI ALRD method: read a register |
| * @lis3: pointer to the device struct |
| * @reg: the register to read |
| * @ret: result of the operation |
| * |
| * Returns 0 on success. |
| */ |
| int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret) |
| { |
| struct acpi_device *dev = lis3->bus_priv; |
| union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
| struct acpi_object_list args = { 1, &arg0 }; |
| unsigned long long lret; |
| acpi_status status; |
| |
| arg0.integer.value = reg; |
| |
| status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret); |
| *ret = lret; |
| return (status != AE_OK) ? -EINVAL : 0; |
| } |
| |
| /** |
| * lis3lv02d_acpi_write - ACPI ALWR method: write to a register |
| * @lis3: pointer to the device struct |
| * @reg: the register to write to |
| * @val: the value to write |
| * |
| * Returns 0 on success. |
| */ |
| int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val) |
| { |
| struct acpi_device *dev = lis3->bus_priv; |
| unsigned long long ret; /* Not used when writting */ |
| union acpi_object in_obj[2]; |
| struct acpi_object_list args = { 2, 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; |
| |
| if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) |
| { |
| lis3_dev.ac = *((union axis_conversion *)dmi->driver_data); |
| pr_info("hardware type %s found\n", dmi->ident); |
| |
| return 1; |
| } |
| |
| /* Represents, for each axis seen by userspace, the corresponding hw axis (+1). |
| * If the value is negative, the opposite of the hw value is used. */ |
| #define DEFINE_CONV(name, x, y, z) \ |
| static union axis_conversion lis3lv02d_axis_##name = \ |
| { .as_array = { x, y, z } } |
| DEFINE_CONV(normal, 1, 2, 3); |
| DEFINE_CONV(y_inverted, 1, -2, 3); |
| DEFINE_CONV(x_inverted, -1, 2, 3); |
| DEFINE_CONV(z_inverted, 1, 2, -3); |
| DEFINE_CONV(xy_swap, 2, 1, 3); |
| DEFINE_CONV(xy_rotated_left, -2, 1, 3); |
| DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3); |
| DEFINE_CONV(xy_swap_inverted, -2, -1, 3); |
| DEFINE_CONV(xy_rotated_right, 2, -1, 3); |
| DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3); |
| |
| #define AXIS_DMI_MATCH(_ident, _name, _axis) { \ |
| .ident = _ident, \ |
| .callback = lis3lv02d_dmi_matched, \ |
| .matches = { \ |
| DMI_MATCH(DMI_PRODUCT_NAME, _name) \ |
| }, \ |
| .driver_data = &lis3lv02d_axis_##_axis \ |
| } |
| |
| #define AXIS_DMI_MATCH2(_ident, _class1, _name1, \ |
| _class2, _name2, \ |
| _axis) { \ |
| .ident = _ident, \ |
| .callback = lis3lv02d_dmi_matched, \ |
| .matches = { \ |
| DMI_MATCH(DMI_##_class1, _name1), \ |
| DMI_MATCH(DMI_##_class2, _name2), \ |
| }, \ |
| .driver_data = &lis3lv02d_axis_##_axis \ |
| } |
| static struct dmi_system_id lis3lv02d_dmi_ids[] = { |
| /* product names are truncated to match all kinds of a same model */ |
| AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), |
| AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), |
| AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), |
| AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), |
| AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), |
| AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap), |
| AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), |
| AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), |
| AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted), |
| AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd), |
| AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd), |
| AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap), |
| AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right), |
| AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted), |
| AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted), |
| AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right), |
| AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap), |
| AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted), |
| AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted), |
| /* Intel-based HP Pavilion dv5 */ |
| AXIS_DMI_MATCH2("HPDV5_I", |
| PRODUCT_NAME, "HP Pavilion dv5", |
| BOARD_NAME, "3603", |
| x_inverted), |
| /* AMD-based HP Pavilion dv5 */ |
| AXIS_DMI_MATCH2("HPDV5_A", |
| PRODUCT_NAME, "HP Pavilion dv5", |
| BOARD_NAME, "3600", |
| y_inverted), |
| AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted), |
| AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted), |
| AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted), |
| AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left), |
| AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left), |
| AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted), |
| AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap), |
| AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted), |
| AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted), |
| AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd), |
| { NULL, } |
| /* Laptop models without axis info (yet): |
| * "NC6910" "HP Compaq 6910" |
| * "NC2400" "HP Compaq nc2400" |
| * "NX74x0" "HP Compaq nx74" |
| * "NX6325" "HP Compaq nx6325" |
| * "NC4400" "HP Compaq nc4400" |
| */ |
| }; |
| |
| static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value) |
| { |
| struct acpi_device *dev = lis3_dev.bus_priv; |
| unsigned long long ret; /* Not used when writing */ |
| union acpi_object in_obj[1]; |
| struct acpi_object_list args = { 1, in_obj }; |
| |
| in_obj[0].type = ACPI_TYPE_INTEGER; |
| in_obj[0].integer.value = !!value; |
| |
| acpi_evaluate_integer(dev->handle, "ALED", &args, &ret); |
| } |
| |
| static struct delayed_led_classdev hpled_led = { |
| .led_classdev = { |
| .name = "hp::hddprotect", |
| .default_trigger = "none", |
| .brightness_set = delayed_sysfs_set, |
| .flags = LED_CORE_SUSPENDRESUME, |
| }, |
| .set_brightness = hpled_set, |
| }; |
| |
| static acpi_status |
| lis3lv02d_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 lis3lv02d_enum_resources(struct acpi_device *device) |
| { |
| acpi_status status; |
| |
| status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, |
| lis3lv02d_get_resource, &lis3_dev.irq); |
| if (ACPI_FAILURE(status)) |
| printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); |
| } |
| |
| static int lis3lv02d_add(struct acpi_device *device) |
| { |
| int ret; |
| |
| if (!device) |
| return -EINVAL; |
| |
| lis3_dev.bus_priv = device; |
| lis3_dev.init = lis3lv02d_acpi_init; |
| lis3_dev.read = lis3lv02d_acpi_read; |
| lis3_dev.write = lis3lv02d_acpi_write; |
| strcpy(acpi_device_name(device), DRIVER_NAME); |
| strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); |
| device->driver_data = &lis3_dev; |
| |
| /* obtain IRQ number of our device from ACPI */ |
| lis3lv02d_enum_resources(device); |
| |
| /* If possible use a "standard" axes order */ |
| if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) { |
| pr_info("Using custom axes %d,%d,%d\n", |
| lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z); |
| } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { |
| pr_info("laptop model unknown, using default axes configuration\n"); |
| lis3_dev.ac = lis3lv02d_axis_normal; |
| } |
| |
| /* call the core layer do its init */ |
| ret = lis3lv02d_init_device(&lis3_dev); |
| if (ret) |
| return ret; |
| |
| INIT_WORK(&hpled_led.work, delayed_set_status_worker); |
| ret = led_classdev_register(NULL, &hpled_led.led_classdev); |
| if (ret) { |
| lis3lv02d_joystick_disable(&lis3_dev); |
| lis3lv02d_poweroff(&lis3_dev); |
| flush_work(&hpled_led.work); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| static int lis3lv02d_remove(struct acpi_device *device, int type) |
| { |
| if (!device) |
| return -EINVAL; |
| |
| lis3lv02d_joystick_disable(&lis3_dev); |
| lis3lv02d_poweroff(&lis3_dev); |
| |
| led_classdev_unregister(&hpled_led.led_classdev); |
| flush_work(&hpled_led.work); |
| |
| return lis3lv02d_remove_fs(&lis3_dev); |
| } |
| |
| |
| #ifdef CONFIG_PM |
| static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) |
| { |
| /* make sure the device is off when we suspend */ |
| lis3lv02d_poweroff(&lis3_dev); |
| return 0; |
| } |
| |
| static int lis3lv02d_resume(struct acpi_device *device) |
| { |
| return lis3lv02d_poweron(&lis3_dev); |
| } |
| #else |
| #define lis3lv02d_suspend NULL |
| #define lis3lv02d_resume NULL |
| #endif |
| |
| /* For the HP MDPS aka 3D Driveguard */ |
| static struct acpi_driver lis3lv02d_driver = { |
| .name = DRIVER_NAME, |
| .class = ACPI_MDPS_CLASS, |
| .ids = lis3lv02d_device_ids, |
| .ops = { |
| .add = lis3lv02d_add, |
| .remove = lis3lv02d_remove, |
| .suspend = lis3lv02d_suspend, |
| .resume = lis3lv02d_resume, |
| } |
| }; |
| |
| static int __init lis3lv02d_init_module(void) |
| { |
| int ret; |
| |
| if (acpi_disabled) |
| return -ENODEV; |
| |
| ret = acpi_bus_register_driver(&lis3lv02d_driver); |
| if (ret < 0) |
| return ret; |
| |
| pr_info("driver loaded\n"); |
| |
| return 0; |
| } |
| |
| static void __exit lis3lv02d_exit_module(void) |
| { |
| acpi_bus_unregister_driver(&lis3lv02d_driver); |
| } |
| |
| MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); |
| MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(lis3lv02d_init_module); |
| module_exit(lis3lv02d_exit_module); |