staging: quickstart: remove driver (0be013e3) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/staging/Kconfig

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		@@ -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

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		@@ -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

deleted100644 → 0

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		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

deleted100644 → 0

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		obj-$(CONFIG_ACPI_QUICKSTART) += quickstart.o

drivers/staging/quickstart/quickstart.c

deleted100644 → 0

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		/*
		* 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);