/* * 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 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "lis3lv02d.h" #define DRIVER_NAME "lis3lv02d" #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. * @handle: the handle of the device * * Returns AE_OK on success. */ acpi_status lis3lv02d_acpi_init(acpi_handle handle) { return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL); } /** * lis3lv02d_acpi_read - ACPI ALRD method: read a register * @handle: the handle of the device * @reg: the register to read * @ret: result of the operation * * Returns AE_OK on success. */ acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret) { 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(handle, "ALRD", &args, &lret); *ret = lret; return status; } /** * lis3lv02d_acpi_write - ACPI ALWR method: write to a register * @handle: the handle of the device * @reg: the register to write to * @val: the value to write * * Returns AE_OK on success. */ acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val) { 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; return acpi_evaluate_integer(handle, "ALWR", &args, &ret); } static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) { adev.ac = *((struct axis_conversion *)dmi->driver_data); printk(KERN_INFO DRIVER_NAME ": 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. */ static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3}; static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3}; static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3}; static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3}; static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3}; static struct axis_conversion lis3lv02d_axis_xy_swap_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 \ } 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("NC8510", "HP Compaq 8510", xy_swap_inverted), AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), { NULL, } /* Laptop models without axis info (yet): * "NC651xx" "HP Compaq 651" * "NC671xx" "HP Compaq 671" * "NC6910" "HP Compaq 6910" * HP Compaq 8710x Notebook PC / Mobile Workstation * "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) { acpi_handle handle = adev.device->handle; 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(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 int lis3lv02d_add(struct acpi_device *device) { u8 val; int ret; if (!device) return -EINVAL; adev.device = device; adev.init = lis3lv02d_acpi_init; adev.read = lis3lv02d_acpi_read; adev.write = lis3lv02d_acpi_write; strcpy(acpi_device_name(device), DRIVER_NAME); strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); device->driver_data = &adev; lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val); if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) { printk(KERN_ERR DRIVER_NAME ": Accelerometer chip not LIS3LV02D{L,Q}\n"); } /* If possible use a "standard" axes order */ if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " "using default axes configuration\n"); adev.ac = lis3lv02d_axis_normal; } INIT_WORK(&hpled_led.work, delayed_set_status_worker); ret = led_classdev_register(NULL, &hpled_led.led_classdev); if (ret) return ret; ret = lis3lv02d_init_device(&adev); if (ret) { flush_work(&hpled_led.work); led_classdev_unregister(&hpled_led.led_classdev); return ret; } return ret; } static int lis3lv02d_remove(struct acpi_device *device, int type) { if (!device) return -EINVAL; lis3lv02d_joystick_disable(); lis3lv02d_poweroff(device->handle); flush_work(&hpled_led.work); led_classdev_unregister(&hpled_led.led_classdev); return lis3lv02d_remove_fs(); } #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(device->handle); return 0; } static int lis3lv02d_resume(struct acpi_device *device) { /* put back the device in the right state (ACPI might turn it on) */ mutex_lock(&adev.lock); if (adev.usage > 0) lis3lv02d_poweron(device->handle); else lis3lv02d_poweroff(device->handle); mutex_unlock(&adev.lock); return 0; } #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; printk(KERN_INFO DRIVER_NAME " 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);