[linux-2.6-block.git] / 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);
Commit	Line	Data
6da4cd46 AA	1	/*
	2	* quickstart.c - ACPI Direct App Launch driver
	3	*
	4	*
	5	* Copyright (C) 2007-2010 Angelo Arrifano <miknix@gmail.com>
	6	*
5c9ed5be	7	* Information gathered from disassembled dsdt and from here:
f94fdeaa	8	* <http://www.microsoft.com/whdc/system/platform/firmware/DirAppLaunch.mspx>
6da4cd46 AA	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*
	24	*/
	25
af5728e0	26	#define QUICKSTART_VERSION "1.04"
6da4cd46	27
74eabe4c SJ	28	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
74eabe4c SJ	29
6da4cd46 AA	30	#include <linux/kernel.h>
	31	#include <linux/module.h>
	32	#include <linux/init.h>
	33	#include <linux/types.h>
8b48463f	34	#include <linux/acpi.h>
6da4cd46 AA	35	#include <linux/platform_device.h>
	36	#include <linux/input.h>
	37
	38	MODULE_AUTHOR("Angelo Arrifano");
	39	MODULE_DESCRIPTION("ACPI Direct App Launch driver");
	40	MODULE_LICENSE("GPL");
	41
5c9ed5be SJ	42	#define QUICKSTART_ACPI_DEVICE_NAME "quickstart"
	43	#define QUICKSTART_ACPI_CLASS "quickstart"
	44	#define QUICKSTART_ACPI_HID "PNP0C32"
6da4cd46	45
5c9ed5be SJ	46	#define QUICKSTART_PF_DRIVER_NAME "quickstart"
5c9ed5be SJ	47	#define QUICKSTART_PF_DEVICE_NAME "quickstart"
6da4cd46	48
5c9ed5be SJ	49	/*
	50	* There will be two events:
	51	* 0x02 - A hot button was pressed while device was off/sleeping.
	52	* 0x80 - A hot button was pressed while device was up.
	53	*/
	54	#define QUICKSTART_EVENT_WAKE 0x02
	55	#define QUICKSTART_EVENT_RUNTIME 0x80
6da4cd46	56
3c92e38d	57	struct quickstart_button {
6da4cd46 AA	58	char *name;
6da4cd46 AA	59	unsigned int id;
505d2ad2	60	struct list_head list;
6da4cd46 AA	61	};
6da4cd46 AA	62
6da4cd46 AA	63	struct quickstart_acpi {
6da4cd46 AA	64	struct acpi_device *device;
3c92e38d	65	struct quickstart_button *button;
6da4cd46	66	};
6da4cd46	67
505d2ad2	68	static LIST_HEAD(buttons);
3c92e38d	69	static struct quickstart_button *pressed;
6da4cd46	70
1692caa9	71	static struct input_dev *quickstart_input;
6da4cd46	72
5c9ed5be	73	/* Platform driver functions */
3b7cf04f GKH	74	static ssize_t buttons_show(struct device dev, struct device_attribute attr,
3b7cf04f GKH	75	char *buf)
6da4cd46 AA	76	{
6da4cd46 AA	77	int count = 0;
3c92e38d	78	struct quickstart_button *b;
6da4cd46	79
505d2ad2	80	if (list_empty(&buttons))
6da4cd46 AA	81	return snprintf(buf, PAGE_SIZE, "none");
6da4cd46 AA	82
505d2ad2	83	list_for_each_entry(b, &buttons, list) {
21c1ddf3	84	count += snprintf(buf + count, PAGE_SIZE - count, "%u\t%s\n",
505d2ad2 SJ	85	b->id, b->name);
	86
	87	if (count >= PAGE_SIZE) {
	88	count = PAGE_SIZE;
	89	break;
6da4cd46	90	}
6da4cd46 AA	91	}
	92
	93	return count;
	94	}
	95
3b7cf04f GKH	96	static ssize_t pressed_button_show(struct device *dev,
3b7cf04f GKH	97	struct device_attribute attr, char buf)
6da4cd46	98	{
e66912af	99	return scnprintf(buf, PAGE_SIZE, "%s\n",
3991eae9	100	(pressed ? pressed->name : "none"));
6da4cd46 AA	101	}
	102
	103
3b7cf04f GKH	104	static ssize_t pressed_button_store(struct device *dev,
	105	struct device_attribute *attr,
	106	const char *buf, size_t count)
6da4cd46 AA	107	{
	108	if (count < 2)
	109	return -EINVAL;
	110
	111	if (strncasecmp(buf, "none", 4) != 0)
	112	return -EINVAL;
	113
3991eae9	114	pressed = NULL;
6da4cd46 AA	115	return count;
	116	}
	117
5c9ed5be	118	/* Helper functions */
3c92e38d	119	static struct quickstart_button *quickstart_buttons_add(void)
6da4cd46	120	{
3c92e38d	121	struct quickstart_button *b;
6da4cd46	122
505d2ad2 SJ	123	b = kzalloc(sizeof(*b), GFP_KERNEL);
	124	if (!b)
	125	return NULL;
6da4cd46	126
505d2ad2	127	list_add_tail(&b->list, &buttons);
6da4cd46	128
505d2ad2	129	return b;
6da4cd46 AA	130	}
6da4cd46 AA	131
3c92e38d	132	static void quickstart_button_del(struct quickstart_button *data)
6da4cd46	133	{
6da4cd46 AA	134	if (!data)
	135	return;
	136
505d2ad2 SJ	137	list_del(&data->list);
	138	kfree(data->name);
	139	kfree(data);
6da4cd46 AA	140	}
6da4cd46 AA	141
505d2ad2	142	static void quickstart_buttons_free(void)
6da4cd46	143	{
3c92e38d	144	struct quickstart_button b, n;
6da4cd46	145
505d2ad2 SJ	146	list_for_each_entry_safe(b, n, &buttons, list)
505d2ad2 SJ	147	quickstart_button_del(b);
6da4cd46 AA	148	}
	149
	150	/* ACPI Driver functions */
	151	static void quickstart_acpi_notify(acpi_handle handle, u32 event, void *data)
	152	{
	153	struct quickstart_acpi *quickstart = data;
	154
	155	if (!quickstart)
	156	return;
	157
55e40369 SJ	158	switch (event) {
55e40369 SJ	159	case QUICKSTART_EVENT_WAKE:
3c92e38d	160	pressed = quickstart->button;
55e40369 SJ	161	break;
55e40369 SJ	162	case QUICKSTART_EVENT_RUNTIME:
3c92e38d	163	input_report_key(quickstart_input, quickstart->button->id, 1);
6da4cd46	164	input_sync(quickstart_input);
3c92e38d	165	input_report_key(quickstart_input, quickstart->button->id, 0);
6da4cd46	166	input_sync(quickstart_input);
55e40369 SJ	167	break;
55e40369 SJ	168	default:
74eabe4c	169	pr_err("Unexpected ACPI event notify (%u)\n", event);
55e40369	170	break;
6da4cd46	171	}
6da4cd46 AA	172	}
6da4cd46 AA	173
2ac16967	174	static int quickstart_acpi_ghid(struct quickstart_acpi *quickstart)
6da4cd46 AA	175	{
	176	acpi_status status;
	177	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
2ac16967	178	int ret = 0;
6da4cd46	179
5c9ed5be SJ	180	/*
	181	* This returns a buffer telling the button usage ID,
	182	* and triggers pending notify events (The ones before booting).
	183	*/
	184	status = acpi_evaluate_object(quickstart->device->handle, "GHID", NULL,
	185	&buffer);
2ac16967	186	if (ACPI_FAILURE(status)) {
74eabe4c	187	pr_err("%s GHID method failed\n", quickstart->button->name);
2ac16967	188	return -EINVAL;
6da4cd46 AA	189	}
6da4cd46 AA	190
5c9ed5be SJ	191	/*
5c9ed5be SJ	192	* <<The GHID method can return a BYTE, WORD, or DWORD.
6da4cd46	193	* The value must be encoded in little-endian byte
5c9ed5be SJ	194	* order (least significant byte first).>>
5c9ed5be SJ	195	*/
2ac16967 SJ	196	switch (buffer.length) {
2ac16967 SJ	197	case 1:
3c92e38d	198	quickstart->button->id = (uint8_t )buffer.pointer;
2ac16967 SJ	199	break;
2ac16967 SJ	200	case 2:
3c92e38d	201	quickstart->button->id = (uint16_t )buffer.pointer;
2ac16967 SJ	202	break;
2ac16967 SJ	203	case 4:
3c92e38d	204	quickstart->button->id = (uint32_t )buffer.pointer;
2ac16967 SJ	205	break;
2ac16967 SJ	206	case 8:
3c92e38d	207	quickstart->button->id = (uint64_t )buffer.pointer;
2ac16967 SJ	208	break;
2ac16967 SJ	209	default:
5f01f7f3 SJ	210	pr_err("%s GHID method returned buffer of unexpected length %lu\n",
	211	quickstart->button->name,
	212	(unsigned long)buffer.length);
2ac16967 SJ	213	ret = -EINVAL;
	214	break;
	215	}
6da4cd46 AA	216
6da4cd46 AA	217	kfree(buffer.pointer);
2ac16967 SJ	218
2ac16967 SJ	219	return ret;
6da4cd46 AA	220	}
6da4cd46 AA	221
ffe1c056	222	static int quickstart_acpi_config(struct quickstart_acpi *quickstart)
6da4cd46	223	{
ffe1c056 SJ	224	char *bid = acpi_device_bid(quickstart->device);
ffe1c056 SJ	225	char *name;
6da4cd46	226
ffe1c056 SJ	227	name = kmalloc(strlen(bid) + 1, GFP_KERNEL);
	228	if (!name)
	229	return -ENOMEM;
	230
505d2ad2	231	/* Add new button to list */
3c92e38d SJ	232	quickstart->button = quickstart_buttons_add();
3c92e38d SJ	233	if (!quickstart->button) {
ffe1c056	234	kfree(name);
505d2ad2	235	return -ENOMEM;
6da4cd46	236	}
ffe1c056	237
3c92e38d SJ	238	quickstart->button->name = name;
3c92e38d SJ	239	strcpy(quickstart->button->name, bid);
6da4cd46 AA	240
	241	return 0;
	242	}
	243
	244	static int quickstart_acpi_add(struct acpi_device *device)
	245	{
f27a5519 SJ	246	int ret;
	247	acpi_status status;
	248	struct quickstart_acpi *quickstart;
6da4cd46 AA	249
	250	if (!device)
	251	return -EINVAL;
	252
f27a5519	253	quickstart = kzalloc(sizeof(*quickstart), GFP_KERNEL);
6da4cd46 AA	254	if (!quickstart)
	255	return -ENOMEM;
	256
	257	quickstart->device = device;
f27a5519	258
6da4cd46 AA	259	strcpy(acpi_device_name(device), QUICKSTART_ACPI_DEVICE_NAME);
	260	strcpy(acpi_device_class(device), QUICKSTART_ACPI_CLASS);
	261	device->driver_data = quickstart;
	262
	263	/* Add button to list and initialize some stuff */
ffe1c056	264	ret = quickstart_acpi_config(quickstart);
f27a5519	265	if (ret < 0)
6da4cd46 AA	266	goto fail_config;
6da4cd46 AA	267
f27a5519	268	status = acpi_install_notify_handler(device->handle, ACPI_ALL_NOTIFY,
6da4cd46 AA	269	quickstart_acpi_notify,
	270	quickstart);
	271	if (ACPI_FAILURE(status)) {
74eabe4c	272	pr_err("Notify handler install error\n");
6da4cd46 AA	273	ret = -ENODEV;
	274	goto fail_installnotify;
	275	}
	276
f27a5519 SJ	277	ret = quickstart_acpi_ghid(quickstart);
	278	if (ret < 0)
	279	goto fail_ghid;
6da4cd46 AA	280
	281	return 0;
	282
f27a5519 SJ	283	fail_ghid:
	284	acpi_remove_notify_handler(device->handle, ACPI_ALL_NOTIFY,
	285	quickstart_acpi_notify);
	286
6da4cd46	287	fail_installnotify:
3c92e38d	288	quickstart_button_del(quickstart->button);
6da4cd46 AA	289
	290	fail_config:
	291
	292	kfree(quickstart);
	293
	294	return ret;
	295	}
	296
51fac838	297	static int quickstart_acpi_remove(struct acpi_device *device)
6da4cd46	298	{
60955f15 SJ	299	acpi_status status;
60955f15 SJ	300	struct quickstart_acpi *quickstart;
6da4cd46	301
60955f15	302	if (!device)
6da4cd46 AA	303	return -EINVAL;
	304
	305	quickstart = acpi_driver_data(device);
60955f15 SJ	306	if (!quickstart)
60955f15 SJ	307	return -EINVAL;
6da4cd46	308
5c9ed5be SJ	309	status = acpi_remove_notify_handler(device->handle, ACPI_ALL_NOTIFY,
5c9ed5be SJ	310	quickstart_acpi_notify);
6da4cd46	311	if (ACPI_FAILURE(status))
74eabe4c	312	pr_err("Error removing notify handler\n");
6da4cd46	313
6da4cd46 AA	314	kfree(quickstart);
	315
	316	return 0;
	317	}
	318
605926ef	319	/* Platform driver structs */
3b7cf04f GKH	320	static DEVICE_ATTR_RW(pressed_button);
3b7cf04f GKH	321	static DEVICE_ATTR_RO(buttons);
605926ef SJ	322	static struct platform_device *pf_device;
	323	static struct platform_driver pf_driver = {
	324	.driver = {
	325	.name = QUICKSTART_PF_DRIVER_NAME,
	326	.owner = THIS_MODULE,
	327	}
	328	};
	329
	330	static const struct acpi_device_id quickstart_device_ids[] = {
	331	{QUICKSTART_ACPI_HID, 0},
	332	{"", 0},
	333	};
	334
	335	static struct acpi_driver quickstart_acpi_driver = {
	336	.name = "quickstart",
	337	.class = QUICKSTART_ACPI_CLASS,
	338	.ids = quickstart_device_ids,
	339	.ops = {
	340	.add = quickstart_acpi_add,
	341	.remove = quickstart_acpi_remove,
	342	},
	343	};
	344
6da4cd46	345	/* Module functions */
6da4cd46 AA	346	static void quickstart_exit(void)
	347	{
	348	input_unregister_device(quickstart_input);
6da4cd46 AA	349
	350	device_remove_file(&pf_device->dev, &dev_attr_pressed_button);
	351	device_remove_file(&pf_device->dev, &dev_attr_buttons);
	352
	353	platform_device_unregister(pf_device);
	354
	355	platform_driver_unregister(&pf_driver);
	356
	357	acpi_bus_unregister_driver(&quickstart_acpi_driver);
	358
505d2ad2	359	quickstart_buttons_free();
6da4cd46 AA	360	}
	361
	362	static int __init quickstart_init_input(void)
	363	{
3c92e38d	364	struct quickstart_button *b;
ebba26f4	365	int ret;
6da4cd46 AA	366
	367	quickstart_input = input_allocate_device();
	368
	369	if (!quickstart_input)
	370	return -ENOMEM;
	371
	372	quickstart_input->name = "Quickstart ACPI Buttons";
	373	quickstart_input->id.bustype = BUS_HOST;
	374
505d2ad2	375	list_for_each_entry(b, &buttons, list) {
6da4cd46	376	set_bit(EV_KEY, quickstart_input->evbit);
505d2ad2	377	set_bit(b->id, quickstart_input->keybit);
6da4cd46 AA	378	}
6da4cd46 AA	379
ebba26f4 DC	380	ret = input_register_device(quickstart_input);
	381	if (ret) {
	382	input_free_device(quickstart_input);
	383	return ret;
	384	}
	385
	386	return 0;
6da4cd46 AA	387	}
	388
	389	static int __init quickstart_init(void)
	390	{
	391	int ret;
6da4cd46	392
6da4cd46	393	/* ACPI driver register */
f0903863 DC	394	ret = acpi_bus_register_driver(&quickstart_acpi_driver);
	395	if (ret)
	396	return ret;
6da4cd46 AA	397
6da4cd46 AA	398	/* If existing bus with no devices */
505d2ad2	399	if (list_empty(&buttons)) {
6da4cd46 AA	400	ret = -ENODEV;
	401	goto fail_pfdrv_reg;
	402	}
	403
	404	/* Platform driver register */
	405	ret = platform_driver_register(&pf_driver);
	406	if (ret)
	407	goto fail_pfdrv_reg;
	408
	409	/* Platform device register */
	410	pf_device = platform_device_alloc(QUICKSTART_PF_DEVICE_NAME, -1);
	411	if (!pf_device) {
	412	ret = -ENOMEM;
	413	goto fail_pfdev_alloc;
	414	}
	415	ret = platform_device_add(pf_device);
	416	if (ret)
	417	goto fail_pfdev_add;
	418
	419	/* Create device sysfs file */
	420	ret = device_create_file(&pf_device->dev, &dev_attr_pressed_button);
	421	if (ret)
	422	goto fail_dev_file;
	423
	424	ret = device_create_file(&pf_device->dev, &dev_attr_buttons);
	425	if (ret)
	426	goto fail_dev_file2;
	427
6da4cd46 AA	428	/* Input device */
	429	ret = quickstart_init_input();
	430	if (ret)
	431	goto fail_input;
	432
74eabe4c	433	pr_info("ACPI Direct App Launch ver %s\n", QUICKSTART_VERSION);
6da4cd46 AA	434
	435	return 0;
	436	fail_input:
	437	device_remove_file(&pf_device->dev, &dev_attr_buttons);
	438
	439	fail_dev_file2:
	440	device_remove_file(&pf_device->dev, &dev_attr_pressed_button);
	441
	442	fail_dev_file:
	443	platform_device_del(pf_device);
	444
	445	fail_pfdev_add:
	446	platform_device_put(pf_device);
	447
	448	fail_pfdev_alloc:
	449	platform_driver_unregister(&pf_driver);
	450
	451	fail_pfdrv_reg:
	452	acpi_bus_unregister_driver(&quickstart_acpi_driver);
	453
	454	return ret;
	455	}
	456
	457	module_init(quickstart_init);
	458	module_exit(quickstart_exit);