/* * Copyright (C) 2009 Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> * * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <linux/init.h> #include <linux/module.h> #include <linux/workqueue.h> #include <acpi/acpi_drivers.h> #include <linux/backlight.h> #include <linux/input.h> MODULE_LICENSE("GPL"); struct cmpc_accel { int sensitivity; }; #define CMPC_ACCEL_SENSITIVITY_DEFAULT 5 #define CMPC_ACCEL_HID "ACCE0000" #define CMPC_TABLET_HID "TBLT0000" #define CMPC_BL_HID "IPML200" #define CMPC_KEYS_HID "FnBT0000" /* * Generic input device code. */ typedef void (*input_device_init)(struct input_dev *dev); static int cmpc_add_acpi_notify_device(struct acpi_device *acpi, char *name, input_device_init idev_init) { struct input_dev *inputdev; int error; inputdev = input_allocate_device(); if (!inputdev) return -ENOMEM; inputdev->name = name; inputdev->dev.parent = &acpi->dev; idev_init(inputdev); error = input_register_device(inputdev); if (error) { input_free_device(inputdev); return error; } dev_set_drvdata(&acpi->dev, inputdev); return 0; } static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi) { struct input_dev *inputdev = dev_get_drvdata(&acpi->dev); input_unregister_device(inputdev); return 0; } /* * Accelerometer code. */ static acpi_status cmpc_start_accel(acpi_handle handle) { union acpi_object param[2]; struct acpi_object_list input; acpi_status status; param[0].type = ACPI_TYPE_INTEGER; param[0].integer.value = 0x3; param[1].type = ACPI_TYPE_INTEGER; input.count = 2; input.pointer = param; status = acpi_evaluate_object(handle, "ACMD", &input, NULL); return status; } static acpi_status cmpc_stop_accel(acpi_handle handle) { union acpi_object param[2]; struct acpi_object_list input; acpi_status status; param[0].type = ACPI_TYPE_INTEGER; param[0].integer.value = 0x4; param[1].type = ACPI_TYPE_INTEGER; input.count = 2; input.pointer = param; status = acpi_evaluate_object(handle, "ACMD", &input, NULL); return status; } static acpi_status cmpc_accel_set_sensitivity(acpi_handle handle, int val) { union acpi_object param[2]; struct acpi_object_list input; param[0].type = ACPI_TYPE_INTEGER; param[0].integer.value = 0x02; param[1].type = ACPI_TYPE_INTEGER; param[1].integer.value = val; input.count = 2; input.pointer = param; return acpi_evaluate_object(handle, "ACMD", &input, NULL); } static acpi_status cmpc_get_accel(acpi_handle handle, unsigned char *x, unsigned char *y, unsigned char *z) { union acpi_object param[2]; struct acpi_object_list input; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, 0 }; unsigned char *locs; acpi_status status; param[0].type = ACPI_TYPE_INTEGER; param[0].integer.value = 0x01; param[1].type = ACPI_TYPE_INTEGER; input.count = 2; input.pointer = param; status = acpi_evaluate_object(handle, "ACMD", &input, &output); if (ACPI_SUCCESS(status)) { union acpi_object *obj; obj = output.pointer; locs = obj->buffer.pointer; *x = locs[0]; *y = locs[1]; *z = locs[2]; kfree(output.pointer); } return status; } static void cmpc_accel_handler(struct acpi_device *dev, u32 event) { if (event == 0x81) { unsigned char x, y, z; acpi_status status; status = cmpc_get_accel(dev->handle, &x, &y, &z); if (ACPI_SUCCESS(status)) { struct input_dev *inputdev = dev_get_drvdata(&dev->dev); input_report_abs(inputdev, ABS_X, x); input_report_abs(inputdev, ABS_Y, y); input_report_abs(inputdev, ABS_Z, z); input_sync(inputdev); } } } static ssize_t cmpc_accel_sensitivity_show(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi; struct input_dev *inputdev; struct cmpc_accel *accel; acpi = to_acpi_device(dev); inputdev = dev_get_drvdata(&acpi->dev); accel = dev_get_drvdata(&inputdev->dev); return sprintf(buf, "%d\n", accel->sensitivity); } static ssize_t cmpc_accel_sensitivity_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi; struct input_dev *inputdev; struct cmpc_accel *accel; unsigned long sensitivity; int r; acpi = to_acpi_device(dev); inputdev = dev_get_drvdata(&acpi->dev); accel = dev_get_drvdata(&inputdev->dev); r = strict_strtoul(buf, 0, &sensitivity); if (r) return r; accel->sensitivity = sensitivity; cmpc_accel_set_sensitivity(acpi->handle, sensitivity); return strnlen(buf, count); } struct device_attribute cmpc_accel_sensitivity_attr = { .attr = { .name = "sensitivity", .mode = 0660 }, .show = cmpc_accel_sensitivity_show, .store = cmpc_accel_sensitivity_store }; static int cmpc_accel_open(struct input_dev *input) { struct acpi_device *acpi; acpi = to_acpi_device(input->dev.parent); if (ACPI_SUCCESS(cmpc_start_accel(acpi->handle))) return 0; return -EIO; } static void cmpc_accel_close(struct input_dev *input) { struct acpi_device *acpi; acpi = to_acpi_device(input->dev.parent); cmpc_stop_accel(acpi->handle); } static void cmpc_accel_idev_init(struct input_dev *inputdev) { set_bit(EV_ABS, inputdev->evbit); input_set_abs_params(inputdev, ABS_X, 0, 255, 8, 0); input_set_abs_params(inputdev, ABS_Y, 0, 255, 8, 0); input_set_abs_params(inputdev, ABS_Z, 0, 255, 8, 0); inputdev->open = cmpc_accel_open; inputdev->close = cmpc_accel_close; } static int cmpc_accel_add(struct acpi_device *acpi) { int error; struct input_dev *inputdev; struct cmpc_accel *accel; accel = kmalloc(sizeof(*accel), GFP_KERNEL); if (!accel) return -ENOMEM; accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT; cmpc_accel_set_sensitivity(acpi->handle, accel->sensitivity); error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr); if (error) goto failed_file; error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel", cmpc_accel_idev_init); if (error) goto failed_input; inputdev = dev_get_drvdata(&acpi->dev); dev_set_drvdata(&inputdev->dev, accel); return 0; failed_input: device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr); failed_file: kfree(accel); return error; } static int cmpc_accel_remove(struct acpi_device *acpi, int type) { struct input_dev *inputdev; struct cmpc_accel *accel; inputdev = dev_get_drvdata(&acpi->dev); accel = dev_get_drvdata(&inputdev->dev); device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr); return cmpc_remove_acpi_notify_device(acpi); } static const struct acpi_device_id cmpc_accel_device_ids[] = { {CMPC_ACCEL_HID, 0}, {"", 0} }; static struct acpi_driver cmpc_accel_acpi_driver = { .owner = THIS_MODULE, .name = "cmpc_accel", .class = "cmpc_accel", .ids = cmpc_accel_device_ids, .ops = { .add = cmpc_accel_add, .remove = cmpc_accel_remove, .notify = cmpc_accel_handler, } }; /* * Tablet mode code. */ static acpi_status cmpc_get_tablet(acpi_handle handle, unsigned long long *value) { union acpi_object param; struct acpi_object_list input; unsigned long long output; acpi_status status; param.type = ACPI_TYPE_INTEGER; param.integer.value = 0x01; input.count = 1; input.pointer = ¶m; status = acpi_evaluate_integer(handle, "TCMD", &input, &output); if (ACPI_SUCCESS(status)) *value = output; return status; } static void cmpc_tablet_handler(struct acpi_device *dev, u32 event) { unsigned long long val = 0; struct input_dev *inputdev = dev_get_drvdata(&dev->dev); if (event == 0x81) { if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val))) input_report_switch(inputdev, SW_TABLET_MODE, !val); } } static void cmpc_tablet_idev_init(struct input_dev *inputdev) { unsigned long long val = 0; struct acpi_device *acpi; set_bit(EV_SW, inputdev->evbit); set_bit(SW_TABLET_MODE, inputdev->swbit); acpi = to_acpi_device(inputdev->dev.parent); if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val))) input_report_switch(inputdev, SW_TABLET_MODE, !val); } static int cmpc_tablet_add(struct acpi_device *acpi) { return cmpc_add_acpi_notify_device(acpi, "cmpc_tablet", cmpc_tablet_idev_init); } static int cmpc_tablet_remove(struct acpi_device *acpi, int type) { return cmpc_remove_acpi_notify_device(acpi); } static int cmpc_tablet_resume(struct acpi_device *acpi) { struct input_dev *inputdev = dev_get_drvdata(&acpi->dev); unsigned long long val = 0; if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val))) input_report_switch(inputdev, SW_TABLET_MODE, !val); return 0; } static const struct acpi_device_id cmpc_tablet_device_ids[] = { {CMPC_TABLET_HID, 0}, {"", 0} }; static struct acpi_driver cmpc_tablet_acpi_driver = { .owner = THIS_MODULE, .name = "cmpc_tablet", .class = "cmpc_tablet", .ids = cmpc_tablet_device_ids, .ops = { .add = cmpc_tablet_add, .remove = cmpc_tablet_remove, .resume = cmpc_tablet_resume, .notify = cmpc_tablet_handler, } }; /* * Backlight code. */ static acpi_status cmpc_get_brightness(acpi_handle handle, unsigned long long *value) { union acpi_object param; struct acpi_object_list input; unsigned long long output; acpi_status status; param.type = ACPI_TYPE_INTEGER; param.integer.value = 0xC0; input.count = 1; input.pointer = ¶m; status = acpi_evaluate_integer(handle, "GRDI", &input, &output); if (ACPI_SUCCESS(status)) *value = output; return status; } static acpi_status cmpc_set_brightness(acpi_handle handle, unsigned long long value) { union acpi_object param[2]; struct acpi_object_list input; acpi_status status; unsigned long long output; param[0].type = ACPI_TYPE_INTEGER; param[0].integer.value = 0xC0; param[1].type = ACPI_TYPE_INTEGER; param[1].integer.value = value; input.count = 2; input.pointer = param; status = acpi_evaluate_integer(handle, "GWRI", &input, &output); return status; } static int cmpc_bl_get_brightness(struct backlight_device *bd) { acpi_status status; acpi_handle handle; unsigned long long brightness; handle = bl_get_data(bd); status = cmpc_get_brightness(handle, &brightness); if (ACPI_SUCCESS(status)) return brightness; else return -1; } static int cmpc_bl_update_status(struct backlight_device *bd) { acpi_status status; acpi_handle handle; handle = bl_get_data(bd); status = cmpc_set_brightness(handle, bd->props.brightness); if (ACPI_SUCCESS(status)) return 0; else return -1; } static struct backlight_ops cmpc_bl_ops = { .get_brightness = cmpc_bl_get_brightness, .update_status = cmpc_bl_update_status }; static int cmpc_bl_add(struct acpi_device *acpi) { struct backlight_device *bd; bd = backlight_device_register("cmpc_bl", &acpi->dev, acpi->handle, &cmpc_bl_ops); bd->props.max_brightness = 7; dev_set_drvdata(&acpi->dev, bd); return 0; } static int cmpc_bl_remove(struct acpi_device *acpi, int type) { struct backlight_device *bd; bd = dev_get_drvdata(&acpi->dev); backlight_device_unregister(bd); return 0; } static const struct acpi_device_id cmpc_bl_device_ids[] = { {CMPC_BL_HID, 0}, {"", 0} }; static struct acpi_driver cmpc_bl_acpi_driver = { .owner = THIS_MODULE, .name = "cmpc", .class = "cmpc", .ids = cmpc_bl_device_ids, .ops = { .add = cmpc_bl_add, .remove = cmpc_bl_remove } }; /* * Extra keys code. */ static int cmpc_keys_codes[] = { KEY_UNKNOWN, KEY_WLAN, KEY_SWITCHVIDEOMODE, KEY_BRIGHTNESSDOWN, KEY_BRIGHTNESSUP, KEY_VENDOR, KEY_MAX }; static void cmpc_keys_handler(struct acpi_device *dev, u32 event) { struct input_dev *inputdev; int code = KEY_MAX; if ((event & 0x0F) < ARRAY_SIZE(cmpc_keys_codes)) code = cmpc_keys_codes[event & 0x0F]; inputdev = dev_get_drvdata(&dev->dev);; input_report_key(inputdev, code, !(event & 0x10)); } static void cmpc_keys_idev_init(struct input_dev *inputdev) { int i; set_bit(EV_KEY, inputdev->evbit); for (i = 0; cmpc_keys_codes[i] != KEY_MAX; i++) set_bit(cmpc_keys_codes[i], inputdev->keybit); } static int cmpc_keys_add(struct acpi_device *acpi) { return cmpc_add_acpi_notify_device(acpi, "cmpc_keys", cmpc_keys_idev_init); } static int cmpc_keys_remove(struct acpi_device *acpi, int type) { return cmpc_remove_acpi_notify_device(acpi); } static const struct acpi_device_id cmpc_keys_device_ids[] = { {CMPC_KEYS_HID, 0}, {"", 0} }; static struct acpi_driver cmpc_keys_acpi_driver = { .owner = THIS_MODULE, .name = "cmpc_keys", .class = "cmpc_keys", .ids = cmpc_keys_device_ids, .ops = { .add = cmpc_keys_add, .remove = cmpc_keys_remove, .notify = cmpc_keys_handler, } }; /* * General init/exit code. */ static int cmpc_init(void) { int r; r = acpi_bus_register_driver(&cmpc_keys_acpi_driver); if (r) goto failed_keys; r = acpi_bus_register_driver(&cmpc_bl_acpi_driver); if (r) goto failed_bl; r = acpi_bus_register_driver(&cmpc_tablet_acpi_driver); if (r) goto failed_tablet; r = acpi_bus_register_driver(&cmpc_accel_acpi_driver); if (r) goto failed_accel; return r; failed_accel: acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver); failed_tablet: acpi_bus_unregister_driver(&cmpc_bl_acpi_driver); failed_bl: acpi_bus_unregister_driver(&cmpc_keys_acpi_driver); failed_keys: return r; } static void cmpc_exit(void) { acpi_bus_unregister_driver(&cmpc_accel_acpi_driver); acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver); acpi_bus_unregister_driver(&cmpc_bl_acpi_driver); acpi_bus_unregister_driver(&cmpc_keys_acpi_driver); } module_init(cmpc_init); module_exit(cmpc_exit); static const struct acpi_device_id cmpc_device_ids[] = { {CMPC_ACCEL_HID, 0}, {CMPC_TABLET_HID, 0}, {CMPC_BL_HID, 0}, {CMPC_KEYS_HID, 0}, {"", 0} }; MODULE_DEVICE_TABLE(acpi, cmpc_device_ids);