staging: quickstart: remove driver

The driver hasn't been cleaned up and it doesn't look like anyone is
working on it anymore (including the original author). So remove the
driver from the kernel. If someone wants to work on cleaning it up and
moving it out of staging, this commit can be reverted.
Signed-off-by: NKristina Martšenko <kristina.martsenko@gmail.com>
Cc: Angelo Arrifano <miknix@gentoo.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/Kconfig

@@ -70,8 +70,6 @@ source "drivers/staging/iio/Kconfig"
 
 source "drivers/staging/xgifb/Kconfig"
 
-source "drivers/staging/quickstart/Kconfig"
-
 source "drivers/staging/emxx_udc/Kconfig"
 
 source "drivers/staging/bcm/Kconfig"

drivers/staging/Makefile

@@ -29,7 +29,6 @@ obj-$(CONFIG_VME_BUS)		+= vme/
 obj-$(CONFIG_DX_SEP)            += sep/
 obj-$(CONFIG_IIO)		+= iio/
 obj-$(CONFIG_FB_XGI)		+= xgifb/
-obj-$(CONFIG_ACPI_QUICKSTART)	+= quickstart/
 obj-$(CONFIG_USB_EMXX)		+= emxx_udc/
 obj-$(CONFIG_BCM_WIMAX)		+= bcm/
 obj-$(CONFIG_FT1000)		+= ft1000/

drivers/staging/quickstart/Kconfig

-config ACPI_QUICKSTART
-	tristate "ACPI Quickstart key driver"
-	depends on ACPI && INPUT
-	help
-	  Say Y here if you have a platform that supports the ACPI
-	  quickstart key protocol.
-
-	  To compile this driver as a module, choose M here: the module will be
-	  called quickstart.
-

drivers/staging/quickstart/Makefile

-obj-$(CONFIG_ACPI_QUICKSTART)		+= quickstart.o

drivers/staging/quickstart/quickstart.c

-/*
- *  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);