diff options
Diffstat (limited to 'drivers/staging/quickstart/quickstart.c')
| -rw-r--r-- | drivers/staging/quickstart/quickstart.c | 458 |
1 files changed, 0 insertions, 458 deletions
diff --git a/drivers/staging/quickstart/quickstart.c b/drivers/staging/quickstart/quickstart.c deleted file mode 100644 index a85c3d68c462..000000000000 --- a/drivers/staging/quickstart/quickstart.c +++ /dev/null @@ -1,458 +0,0 @@ -/* - * quickstart.c - ACPI Direct App Launch driver - * - * - * Copyright (C) 2007-2010 Angelo Arrifano <miknix@gmail.com> - * - * Information gathered from disassembled dsdt and from here: - * <http://www.microsoft.com/whdc/system/platform/firmware/DirAppLaunch.mspx> - * - * 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 QUICKSTART_VERSION "1.04" - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/acpi.h> -#include <linux/platform_device.h> -#include <linux/input.h> - -MODULE_AUTHOR("Angelo Arrifano"); -MODULE_DESCRIPTION("ACPI Direct App Launch driver"); -MODULE_LICENSE("GPL"); - -#define QUICKSTART_ACPI_DEVICE_NAME "quickstart" -#define QUICKSTART_ACPI_CLASS "quickstart" -#define QUICKSTART_ACPI_HID "PNP0C32" - -#define QUICKSTART_PF_DRIVER_NAME "quickstart" -#define QUICKSTART_PF_DEVICE_NAME "quickstart" - -/* - * There will be two events: - * 0x02 - A hot button was pressed while device was off/sleeping. - * 0x80 - A hot button was pressed while device was up. - */ -#define QUICKSTART_EVENT_WAKE 0x02 -#define QUICKSTART_EVENT_RUNTIME 0x80 - -struct quickstart_button { - char *name; - unsigned int id; - struct list_head list; -}; - -struct quickstart_acpi { - struct acpi_device *device; - struct quickstart_button *button; -}; - -static LIST_HEAD(buttons); -static struct quickstart_button *pressed; - -static struct input_dev *quickstart_input; - -/* Platform driver functions */ -static ssize_t buttons_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - int count = 0; - struct quickstart_button *b; - - if (list_empty(&buttons)) - return snprintf(buf, PAGE_SIZE, "none"); - - list_for_each_entry(b, &buttons, list) { - count += snprintf(buf + count, PAGE_SIZE - count, "%u\t%s\n", - b->id, b->name); - - if (count >= PAGE_SIZE) { - count = PAGE_SIZE; - break; - } - } - - return count; -} - -static ssize_t pressed_button_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return scnprintf(buf, PAGE_SIZE, "%s\n", - (pressed ? pressed->name : "none")); -} - - -static ssize_t pressed_button_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - if (count < 2) - return -EINVAL; - - if (strncasecmp(buf, "none", 4) != 0) - return -EINVAL; - - pressed = NULL; - return count; -} - -/* Helper functions */ -static struct quickstart_button *quickstart_buttons_add(void) -{ - struct quickstart_button *b; - - b = kzalloc(sizeof(*b), GFP_KERNEL); - if (!b) - return NULL; - - list_add_tail(&b->list, &buttons); - - return b; -} - -static void quickstart_button_del(struct quickstart_button *data) -{ - if (!data) - return; - - list_del(&data->list); - kfree(data->name); - kfree(data); -} - -static void quickstart_buttons_free(void) -{ - struct quickstart_button *b, *n; - - list_for_each_entry_safe(b, n, &buttons, list) - quickstart_button_del(b); -} - -/* ACPI Driver functions */ -static void quickstart_acpi_notify(acpi_handle handle, u32 event, void *data) -{ - struct quickstart_acpi *quickstart = data; - - if (!quickstart) - return; - - switch (event) { - case QUICKSTART_EVENT_WAKE: - pressed = quickstart->button; - break; - case QUICKSTART_EVENT_RUNTIME: - input_report_key(quickstart_input, quickstart->button->id, 1); - input_sync(quickstart_input); - input_report_key(quickstart_input, quickstart->button->id, 0); - input_sync(quickstart_input); - break; - default: - pr_err("Unexpected ACPI event notify (%u)\n", event); - break; - } -} - -static int quickstart_acpi_ghid(struct quickstart_acpi *quickstart) -{ - acpi_status status; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - int ret = 0; - - /* - * This returns a buffer telling the button usage ID, - * and triggers pending notify events (The ones before booting). - */ - status = acpi_evaluate_object(quickstart->device->handle, "GHID", NULL, - &buffer); - if (ACPI_FAILURE(status)) { - pr_err("%s GHID method failed\n", quickstart->button->name); - return -EINVAL; - } - - /* - * <<The GHID method can return a BYTE, WORD, or DWORD. - * The value must be encoded in little-endian byte - * order (least significant byte first).>> - */ - switch (buffer.length) { - case 1: - quickstart->button->id = *(uint8_t *)buffer.pointer; - break; - case 2: - quickstart->button->id = *(uint16_t *)buffer.pointer; - break; - case 4: - quickstart->button->id = *(uint32_t *)buffer.pointer; - break; - case 8: - quickstart->button->id = *(uint64_t *)buffer.pointer; - break; - default: - pr_err("%s GHID method returned buffer of unexpected length %lu\n", - quickstart->button->name, - (unsigned long)buffer.length); - ret = -EINVAL; - break; - } - - kfree(buffer.pointer); - - return ret; -} - -static int quickstart_acpi_config(struct quickstart_acpi *quickstart) -{ - char *bid = acpi_device_bid(quickstart->device); - char *name; - - name = kmalloc(strlen(bid) + 1, GFP_KERNEL); - if (!name) - return -ENOMEM; - - /* Add new button to list */ - quickstart->button = quickstart_buttons_add(); - if (!quickstart->button) { - kfree(name); - return -ENOMEM; - } - - quickstart->button->name = name; - strcpy(quickstart->button->name, bid); - - return 0; -} - -static int quickstart_acpi_add(struct acpi_device *device) -{ - int ret; - acpi_status status; - struct quickstart_acpi *quickstart; - - if (!device) - return -EINVAL; - - quickstart = kzalloc(sizeof(*quickstart), GFP_KERNEL); - if (!quickstart) - return -ENOMEM; - - quickstart->device = device; - - strcpy(acpi_device_name(device), QUICKSTART_ACPI_DEVICE_NAME); - strcpy(acpi_device_class(device), QUICKSTART_ACPI_CLASS); - device->driver_data = quickstart; - - /* Add button to list and initialize some stuff */ - ret = quickstart_acpi_config(quickstart); - if (ret < 0) - goto fail_config; - - status = acpi_install_notify_handler(device->handle, ACPI_ALL_NOTIFY, - quickstart_acpi_notify, - quickstart); - if (ACPI_FAILURE(status)) { - pr_err("Notify handler install error\n"); - ret = -ENODEV; - goto fail_installnotify; - } - - ret = quickstart_acpi_ghid(quickstart); - if (ret < 0) - goto fail_ghid; - - return 0; - -fail_ghid: - acpi_remove_notify_handler(device->handle, ACPI_ALL_NOTIFY, - quickstart_acpi_notify); - -fail_installnotify: - quickstart_button_del(quickstart->button); - -fail_config: - - kfree(quickstart); - - return ret; -} - -static int quickstart_acpi_remove(struct acpi_device *device) -{ - acpi_status status; - struct quickstart_acpi *quickstart; - - if (!device) - return -EINVAL; - - quickstart = acpi_driver_data(device); - if (!quickstart) - return -EINVAL; - - status = acpi_remove_notify_handler(device->handle, ACPI_ALL_NOTIFY, - quickstart_acpi_notify); - if (ACPI_FAILURE(status)) - pr_err("Error removing notify handler\n"); - - kfree(quickstart); - - return 0; -} - -/* Platform driver structs */ -static DEVICE_ATTR_RW(pressed_button); -static DEVICE_ATTR_RO(buttons); -static struct platform_device *pf_device; -static struct platform_driver pf_driver = { - .driver = { - .name = QUICKSTART_PF_DRIVER_NAME, - .owner = THIS_MODULE, - } -}; - -static const struct acpi_device_id quickstart_device_ids[] = { - {QUICKSTART_ACPI_HID, 0}, - {"", 0}, -}; - -static struct acpi_driver quickstart_acpi_driver = { - .name = "quickstart", - .class = QUICKSTART_ACPI_CLASS, - .ids = quickstart_device_ids, - .ops = { - .add = quickstart_acpi_add, - .remove = quickstart_acpi_remove, - }, -}; - -/* Module functions */ -static void quickstart_exit(void) -{ - input_unregister_device(quickstart_input); - - device_remove_file(&pf_device->dev, &dev_attr_pressed_button); - device_remove_file(&pf_device->dev, &dev_attr_buttons); - - platform_device_unregister(pf_device); - - platform_driver_unregister(&pf_driver); - - acpi_bus_unregister_driver(&quickstart_acpi_driver); - - quickstart_buttons_free(); -} - -static int __init quickstart_init_input(void) -{ - struct quickstart_button *b; - int ret; - - quickstart_input = input_allocate_device(); - - if (!quickstart_input) - return -ENOMEM; - - quickstart_input->name = "Quickstart ACPI Buttons"; - quickstart_input->id.bustype = BUS_HOST; - - list_for_each_entry(b, &buttons, list) { - set_bit(EV_KEY, quickstart_input->evbit); - set_bit(b->id, quickstart_input->keybit); - } - - ret = input_register_device(quickstart_input); - if (ret) { - input_free_device(quickstart_input); - return ret; - } - - return 0; -} - -static int __init quickstart_init(void) -{ - int ret; - - /* ACPI driver register */ - ret = acpi_bus_register_driver(&quickstart_acpi_driver); - if (ret) - return ret; - - /* If existing bus with no devices */ - if (list_empty(&buttons)) { - ret = -ENODEV; - goto fail_pfdrv_reg; - } - - /* Platform driver register */ - ret = platform_driver_register(&pf_driver); - if (ret) - goto fail_pfdrv_reg; - - /* Platform device register */ - pf_device = platform_device_alloc(QUICKSTART_PF_DEVICE_NAME, -1); - if (!pf_device) { - ret = -ENOMEM; - goto fail_pfdev_alloc; - } - ret = platform_device_add(pf_device); - if (ret) - goto fail_pfdev_add; - - /* Create device sysfs file */ - ret = device_create_file(&pf_device->dev, &dev_attr_pressed_button); - if (ret) - goto fail_dev_file; - - ret = device_create_file(&pf_device->dev, &dev_attr_buttons); - if (ret) - goto fail_dev_file2; - - /* Input device */ - ret = quickstart_init_input(); - if (ret) - goto fail_input; - - pr_info("ACPI Direct App Launch ver %s\n", QUICKSTART_VERSION); - - return 0; -fail_input: - device_remove_file(&pf_device->dev, &dev_attr_buttons); - -fail_dev_file2: - device_remove_file(&pf_device->dev, &dev_attr_pressed_button); - -fail_dev_file: - platform_device_del(pf_device); - -fail_pfdev_add: - platform_device_put(pf_device); - -fail_pfdev_alloc: - platform_driver_unregister(&pf_driver); - -fail_pfdrv_reg: - acpi_bus_unregister_driver(&quickstart_acpi_driver); - - return ret; -} - -module_init(quickstart_init); -module_exit(quickstart_exit); |