[mirror_ubuntu-bionic-kernel.git] / drivers / acpi / sony_acpi.c

/*
 * ACPI Sony Notebook Control Driver (SNC)
 *
 * Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net>
 *
 * Parts of this driver inspired from asus_acpi.c and ibm_acpi.c
 * which are copyrighted by their respective authors.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/backlight.h>
#include <linux/err.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>

#define ACPI_SNC_CLASS		"sony"
#define ACPI_SNC_HID		"SNY5001"
#define ACPI_SNC_DRIVER_NAME	"ACPI Sony Notebook Control Driver v0.3"

/* the device uses 1-based values, while the backlight subsystem uses
   0-based values */
#define SONY_MAX_BRIGHTNESS	8

#define LOG_PFX			KERN_WARNING "sony_acpi: "

MODULE_AUTHOR("Stelian Pop");
MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME);
MODULE_LICENSE("GPL");

static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
			"the development of this driver");

static acpi_handle sony_acpi_handle;
static struct proc_dir_entry *sony_acpi_dir;
static struct acpi_device *sony_acpi_acpi_device = NULL;

static int sony_backlight_update_status(struct backlight_device *bd);
static int sony_backlight_get_brightness(struct backlight_device *bd);
static struct backlight_device *sony_backlight_device;
static struct backlight_properties sony_backlight_properties = {
	.owner		= THIS_MODULE,
	.update_status	= sony_backlight_update_status,
	.get_brightness	= sony_backlight_get_brightness,
	.max_brightness	= SONY_MAX_BRIGHTNESS - 1,
};

static struct sony_acpi_value {
	char			*name;	 /* name of the entry */
	struct proc_dir_entry	*proc;	 /* /proc entry */
	char			*acpiget;/* name of the ACPI get function */
	char			*acpiset;/* name of the ACPI get function */
	int 			min;	 /* minimum allowed value or -1 */
	int			max;	 /* maximum allowed value or -1 */
	int			value;	 /* current setting */
	int			valid;	 /* Has ever been set */
	int			debug;	 /* active only in debug mode ? */
} sony_acpi_values[] = {
	{
		/* for backward compatibility only */
		.name		= "brightness",
		.acpiget	= "GBRT",
		.acpiset	= "SBRT",
		.min		= 1,
		.max		= SONY_MAX_BRIGHTNESS,
		.debug		= 0,
	},
	{
		.name		= "brightness_default",
		.acpiget	= "GPBR",
		.acpiset	= "SPBR",
		.min		= 1,
		.max		= SONY_MAX_BRIGHTNESS,
		.debug		= 0,
	},
	{
		.name           = "fnkey",
		.acpiget        = "GHKE",
		.debug          = 0,
	},
	{
		.name		= "cdpower",
		.acpiget	= "GCDP",
		.acpiset	= "SCDP",
		.min		= 0,
		.max		= 1,
		.debug		= 0,
	},
	{
		.name		= "cdpower",
		.acpiget	= "GCDP",
		.acpiset	= "CDPW",
		.min		= 0,
		.max		= 1,
		.debug		= 0,
	},
	{
		.name           = "audiopower",
		.acpiget        = "GAZP",
		.acpiset        = "AZPW",
		.min            = 0,
		.max            = 1,
		.debug          = 0,
	},
	{
		.name           = "lanpower",
		.acpiget        = "GLNP",
		.acpiset        = "LNPW",
		.min            = 0,
		.max            = 1,
		.debug          = 1,
	},
	{
		.name		= "PID",
		.acpiget	= "GPID",
		.debug		= 1,
	},
	{
		.name		= "CTR",
		.acpiget	= "GCTR",
		.acpiset	= "SCTR",
		.min		= -1,
		.max		= -1,
		.debug		= 1,
	},
	{
		.name		= "PCR",
		.acpiget	= "GPCR",
		.acpiset	= "SPCR",
		.min		= -1,
		.max		= -1,
		.debug		= 1,
	},
	{
		.name		= "CMI",
		.acpiget	= "GCMI",
		.acpiset	= "SCMI",
		.min		= -1,
		.max		= -1,
		.debug		= 1,
	},
	{
		.name		= NULL,
	}
};

static int acpi_callgetfunc(acpi_handle handle, char *name, int *result)
{
	struct acpi_buffer output;
	union acpi_object out_obj;
	acpi_status status;

	output.length = sizeof(out_obj);
	output.pointer = &out_obj;

	status = acpi_evaluate_object(handle, name, NULL, &output);
	if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) {
		*result = out_obj.integer.value;
		return 0;
	}

	printk(LOG_PFX "acpi_callreadfunc failed\n");

	return -1;
}

static int acpi_callsetfunc(acpi_handle handle, char *name, int value,
			    int *result)
{
	struct acpi_object_list params;
	union acpi_object in_obj;
	struct acpi_buffer output;
	union acpi_object out_obj;
	acpi_status status;

	params.count = 1;
	params.pointer = &in_obj;
	in_obj.type = ACPI_TYPE_INTEGER;
	in_obj.integer.value = value;

	output.length = sizeof(out_obj);
	output.pointer = &out_obj;

	status = acpi_evaluate_object(handle, name, &params, &output);
	if (status == AE_OK) {
		if (result != NULL) {
			if (out_obj.type != ACPI_TYPE_INTEGER) {
				printk(LOG_PFX "acpi_evaluate_object bad "
				       "return type\n");
				return -1;
			}
			*result = out_obj.integer.value;
		}
		return 0;
	}

	printk(LOG_PFX "acpi_evaluate_object failed\n");

	return -1;
}

static int parse_buffer(const char __user *buffer, unsigned long count,
			int *val) {
	char s[32];
	int ret;

	if (count > 31)
		return -EINVAL;
	if (copy_from_user(s, buffer, count))
		return -EFAULT;
	s[count] = '\0';
	ret = simple_strtoul(s, NULL, 10);
	*val = ret;
	return 0;
}

static int sony_acpi_read(char* page, char** start, off_t off, int count,
			  int* eof, void *data)
{
	struct sony_acpi_value *item = data;
	int value;

	if (!item->acpiget)
		return -EIO;

	if (acpi_callgetfunc(sony_acpi_handle, item->acpiget, &value) < 0)
		return -EIO;

	return sprintf(page, "%d\n", value);
}

static int sony_acpi_write(struct file *file, const char __user *buffer,
			   unsigned long count, void *data)
{
	struct sony_acpi_value *item = data;
	int result;
	int value;

	if (!item->acpiset)
		return -EIO;

	if ((result = parse_buffer(buffer, count, &value)) < 0)
		return result;

	if (item->min != -1 && value < item->min)
		return -EINVAL;
	if (item->max != -1 && value > item->max)
		return -EINVAL;

	if (acpi_callsetfunc(sony_acpi_handle, item->acpiset, value, NULL) < 0)
		return -EIO;
	item->value = value;
	item->valid = 1;
	return count;
}

static int sony_acpi_resume(struct acpi_device *device)
{
	struct sony_acpi_value *item;

	for (item = sony_acpi_values; item->name; item++) {
		int ret;

		if (!item->valid)
			continue;
		ret = acpi_callsetfunc(sony_acpi_handle, item->acpiset,
					item->value, NULL);
		if (ret < 0) {
			printk("%s: %d\n", __FUNCTION__, ret);
			break;
		}
	}
	return 0;
}

static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
{
	if (debug)
		printk(LOG_PFX "sony_acpi_notify, event: %d\n", event);
	acpi_bus_generate_event(sony_acpi_acpi_device, 1, event);
}

static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
				      void *context, void **return_value)
{
	struct acpi_namespace_node *node;
	union acpi_operand_object *operand;

	node = (struct acpi_namespace_node *) handle;
	operand = (union acpi_operand_object *) node->object;

	printk(LOG_PFX "method: name: %4.4s, args %X\n", node->name.ascii,
	       (u32) operand->method.param_count);

	return AE_OK;
}

static int sony_acpi_add(struct acpi_device *device)
{
	acpi_status status;
	int result;
	acpi_handle handle;
	mode_t proc_file_mode;
	struct sony_acpi_value *item;

	sony_acpi_acpi_device = device;

	sony_acpi_handle = device->handle;

	acpi_driver_data(device) = NULL;
	acpi_device_dir(device) = sony_acpi_dir;

	if (debug) {
		status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_acpi_handle,
					     1, sony_walk_callback, NULL, NULL);
		if (ACPI_FAILURE(status)) {
			printk(LOG_PFX "unable to walk acpi resources\n");
			result = -ENODEV;
			goto outwalk;
		}
	}

	status = acpi_install_notify_handler(sony_acpi_handle,
					     ACPI_DEVICE_NOTIFY,
					     sony_acpi_notify,
					     NULL);
	if (ACPI_FAILURE(status)) {
		printk(LOG_PFX "unable to install notify handler\n");
		result = -ENODEV;
		goto outnotify;
	}

	if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) {
		sony_backlight_device = backlight_device_register("sony", NULL,
					NULL, &sony_backlight_properties);
	        if (IS_ERR(sony_backlight_device)) {
        	        printk(LOG_PFX "unable to register backlight device\n");
		}
	}

	for (item = sony_acpi_values; item->name; ++item) {
		proc_file_mode = 0;

		if (!debug && item->debug)
			continue;

		if (item->acpiget) {
			if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
							item->acpiget, &handle)))
				continue;

			proc_file_mode |= S_IRUSR;
		}

		if (item->acpiset) {
			if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
							item->acpiset, &handle)))
				continue;

			proc_file_mode |= S_IWUSR;
		}

		item->proc = create_proc_entry(item->name, proc_file_mode,
				acpi_device_dir(device));
		if (!item->proc) {
			printk(LOG_PFX "unable to create proc entry\n");
			result = -EIO;
			goto outproc;
		}

		item->proc->read_proc = sony_acpi_read;
		item->proc->write_proc = sony_acpi_write;
		item->proc->data = item;
		item->proc->owner = THIS_MODULE;
	}

	printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n");

	return 0;

outproc:
	for (item = sony_acpi_values; item->name; ++item)
		if (item->proc)
			remove_proc_entry(item->name, acpi_device_dir(device));
outnotify:
	status = acpi_remove_notify_handler(sony_acpi_handle,
					    ACPI_DEVICE_NOTIFY,
					    sony_acpi_notify);
	if (ACPI_FAILURE(status))
		printk(LOG_PFX "unable to remove notify handler\n");
outwalk:
	return result;
}

static int sony_acpi_remove(struct acpi_device *device, int type)
{
	acpi_status status;
	struct sony_acpi_value *item;

	if (sony_backlight_device)
		backlight_device_unregister(sony_backlight_device);

	sony_acpi_acpi_device = NULL;

	status = acpi_remove_notify_handler(sony_acpi_handle,
					    ACPI_DEVICE_NOTIFY,
					    sony_acpi_notify);
	if (ACPI_FAILURE(status))
		printk(LOG_PFX "unable to remove notify handler\n");

	for (item = sony_acpi_values; item->name; ++item)
		if (item->proc)
			remove_proc_entry(item->name, acpi_device_dir(device));

	printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n");

	return 0;
}

static int sony_backlight_update_status(struct backlight_device *bd)
{
	return acpi_callsetfunc(sony_acpi_handle, "SBRT",
				bd->props->brightness + 1,
				NULL);
}

static int sony_backlight_get_brightness(struct backlight_device *bd)
{
	int value;

	if (acpi_callgetfunc(sony_acpi_handle, "GBRT", &value))
		return 0;
	/* brightness levels are 1-based, while backlight ones are 0-based */
	return value - 1;
}

static struct acpi_driver sony_acpi_driver = {
	.name	= ACPI_SNC_DRIVER_NAME,
	.class	= ACPI_SNC_CLASS,
	.ids	= ACPI_SNC_HID,
	.ops	= {
			.add	= sony_acpi_add,
			.remove	= sony_acpi_remove,
			.resume = sony_acpi_resume,
		  },
};

static int __init sony_acpi_init(void)
{
	int result;

	sony_acpi_dir = proc_mkdir("sony", acpi_root_dir);
	if (!sony_acpi_dir) {
		printk(LOG_PFX "unable to create /proc entry\n");
		return -ENODEV;
	}
	sony_acpi_dir->owner = THIS_MODULE;

	result = acpi_bus_register_driver(&sony_acpi_driver);
	if (result < 0) {
		remove_proc_entry("sony", acpi_root_dir);
		return -ENODEV;
	}
	return 0;
}


static void __exit sony_acpi_exit(void)
{
	acpi_bus_unregister_driver(&sony_acpi_driver);
	remove_proc_entry("sony", acpi_root_dir);
}

module_init(sony_acpi_init);
module_exit(sony_acpi_exit);
Commit	Line	Data
7f09c432 SP	1	/*
	2	* ACPI Sony Notebook Control Driver (SNC)
	3	*
	4	* Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net>
	5	*
	6	* Parts of this driver inspired from asus_acpi.c and ibm_acpi.c
	7	* which are copyrighted by their respective authors.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22	*
	23	*/
	24
	25	#include <linux/kernel.h>
	26	#include <linux/module.h>
	27	#include <linux/moduleparam.h>
	28	#include <linux/init.h>
	29	#include <linux/types.h>
50f62afb AG	30	#include <linux/backlight.h>
50f62afb AG	31	#include <linux/err.h>
7f09c432 SP	32	#include <acpi/acpi_drivers.h>
	33	#include <acpi/acpi_bus.h>
	34	#include <asm/uaccess.h>
	35
	36	#define ACPI_SNC_CLASS "sony"
	37	#define ACPI_SNC_HID "SNY5001"
50f62afb AG	38	#define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.3"
	39
	40	/* the device uses 1-based values, while the backlight subsystem uses
	41	0-based values */
	42	#define SONY_MAX_BRIGHTNESS 8
7f09c432 SP	43
	44	#define LOG_PFX KERN_WARNING "sony_acpi: "
	45
	46	MODULE_AUTHOR("Stelian Pop");
	47	MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME);
	48	MODULE_LICENSE("GPL");
	49
	50	static int debug;
	51	module_param(debug, int, 0);
	52	MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
	53	"the development of this driver");
	54
7f09c432 SP	55	static acpi_handle sony_acpi_handle;
7f09c432 SP	56	static struct proc_dir_entry *sony_acpi_dir;
c561162f	57	static struct acpi_device *sony_acpi_acpi_device = NULL;
7f09c432	58
50f62afb AG	59	static int sony_backlight_update_status(struct backlight_device *bd);
	60	static int sony_backlight_get_brightness(struct backlight_device *bd);
	61	static struct backlight_device *sony_backlight_device;
	62	static struct backlight_properties sony_backlight_properties = {
	63	.owner = THIS_MODULE,
	64	.update_status = sony_backlight_update_status,
	65	.get_brightness = sony_backlight_get_brightness,
	66	.max_brightness = SONY_MAX_BRIGHTNESS - 1,
	67	};
	68
7f09c432 SP	69	static struct sony_acpi_value {
7f09c432 SP	70	char name; / name of the entry */
57ede701	71	struct proc_dir_entry proc; / /proc entry */
7f09c432 SP	72	char acpiget;/ name of the ACPI get function */
	73	char acpiset;/ name of the ACPI get function */
	74	int min; /* minimum allowed value or -1 */
	75	int max; /* maximum allowed value or -1 */
3f4f461f AM	76	int value; /* current setting */
3f4f461f AM	77	int valid; /* Has ever been set */
7f09c432 SP	78	int debug; /* active only in debug mode ? */
7f09c432 SP	79	} sony_acpi_values[] = {
243e8b19	80	{
57ede701	81	/* for backward compatibility only */
243e8b19 AG	82	.name = "brightness",
	83	.acpiget = "GBRT",
	84	.acpiset = "SBRT",
	85	.min = 1,
	86	.max = SONY_MAX_BRIGHTNESS,
	87	.debug = 0,
	88	},
7f09c432 SP	89	{
	90	.name = "brightness_default",
	91	.acpiget = "GPBR",
	92	.acpiset = "SPBR",
	93	.min = 1,
50f62afb	94	.max = SONY_MAX_BRIGHTNESS,
7f09c432 SP	95	.debug = 0,
	96	},
	97	{
	98	.name = "fnkey",
	99	.acpiget = "GHKE",
	100	.debug = 0,
	101	},
	102	{
	103	.name = "cdpower",
	104	.acpiget = "GCDP",
	105	.acpiset = "SCDP",
4465857d MD	106	.min = 0,
4465857d MD	107	.max = 1,
7f09c432 SP	108	.debug = 0,
7f09c432 SP	109	},
57ede701 MD	110	{
	111	.name = "cdpower",
	112	.acpiget = "GCDP",
	113	.acpiset = "CDPW",
	114	.min = 0,
	115	.max = 1,
	116	.debug = 0,
	117	},
4465857d MD	118	{
	119	.name = "audiopower",
	120	.acpiget = "GAZP",
	121	.acpiset = "AZPW",
	122	.min = 0,
	123	.max = 1,
	124	.debug = 0,
	125	},
	126	{
	127	.name = "lanpower",
	128	.acpiget = "GLNP",
	129	.acpiset = "LNPW",
	130	.min = 0,
	131	.max = 1,
	132	.debug = 1,
	133	},
7f09c432 SP	134	{
	135	.name = "PID",
	136	.acpiget = "GPID",
	137	.debug = 1,
	138	},
	139	{
	140	.name = "CTR",
	141	.acpiget = "GCTR",
	142	.acpiset = "SCTR",
	143	.min = -1,
	144	.max = -1,
	145	.debug = 1,
	146	},
	147	{
	148	.name = "PCR",
	149	.acpiget = "GPCR",
	150	.acpiset = "SPCR",
	151	.min = -1,
	152	.max = -1,
	153	.debug = 1,
	154	},
	155	{
	156	.name = "CMI",
	157	.acpiget = "GCMI",
	158	.acpiset = "SCMI",
	159	.min = -1,
	160	.max = -1,
	161	.debug = 1,
	162	},
	163	{
	164	.name = NULL,
	165	}
	166	};
	167
	168	static int acpi_callgetfunc(acpi_handle handle, char name, int result)
	169	{
	170	struct acpi_buffer output;
	171	union acpi_object out_obj;
	172	acpi_status status;
	173
	174	output.length = sizeof(out_obj);
	175	output.pointer = &out_obj;
	176
	177	status = acpi_evaluate_object(handle, name, NULL, &output);
	178	if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) {
	179	*result = out_obj.integer.value;
	180	return 0;
	181	}
	182
	183	printk(LOG_PFX "acpi_callreadfunc failed\n");
	184
	185	return -1;
	186	}
	187
	188	static int acpi_callsetfunc(acpi_handle handle, char *name, int value,
	189	int *result)
	190	{
	191	struct acpi_object_list params;
	192	union acpi_object in_obj;
	193	struct acpi_buffer output;
	194	union acpi_object out_obj;
	195	acpi_status status;
	196
	197	params.count = 1;
198	params.pointer = &in_obj;
199	in_obj.type = ACPI_TYPE_INTEGER;
200	in_obj.integer.value = value;
201
202	output.length = sizeof(out_obj);
203	output.pointer = &out_obj;
204
205	status = acpi_evaluate_object(handle, name, &params, &output);
206	if (status == AE_OK) {
207	if (result != NULL) {
208	if (out_obj.type != ACPI_TYPE_INTEGER) {
209	printk(LOG_PFX "acpi_evaluate_object bad "
210	"return type\n");
211	return -1;
212	}
213	*result = out_obj.integer.value;
214	}
215	return 0;
216	}
217
218	printk(LOG_PFX "acpi_evaluate_object failed\n");
219
220	return -1;
221	}
222
223	static int parse_buffer(const char __user *buffer, unsigned long count,
224	int *val) {
225	char s[32];
226	int ret;
227
228	if (count > 31)
229	return -EINVAL;
230	if (copy_from_user(s, buffer, count))
231	return -EFAULT;
232	s[count] = '\0';
233	ret = simple_strtoul(s, NULL, 10);
234	*val = ret;
235	return 0;
236	}
237
238	static int sony_acpi_read(char* page, char** start, off_t off, int count,
239	int* eof, void *data)
240	{
241	struct sony_acpi_value *item = data;
242	int value;
243
244	if (!item->acpiget)
245	return -EIO;
246
247	if (acpi_callgetfunc(sony_acpi_handle, item->acpiget, &value) < 0)
248	return -EIO;
249
250	return sprintf(page, "%d\n", value);
251	}
252
253	static int sony_acpi_write(struct file file, const char __user buffer,
254	unsigned long count, void *data)
255	{
256	struct sony_acpi_value *item = data;
257	int result;
258	int value;
259
260	if (!item->acpiset)
261	return -EIO;
262
263	if ((result = parse_buffer(buffer, count, &value)) < 0)
264	return result;
265
266	if (item->min != -1 && value < item->min)
267	return -EINVAL;
268	if (item->max != -1 && value > item->max)
269	return -EINVAL;
270
271	if (acpi_callsetfunc(sony_acpi_handle, item->acpiset, value, NULL) < 0)
272	return -EIO;
3f4f461f AM	273	item->value = value;
3f4f461f AM	274	item->valid = 1;
7f09c432 SP	275	return count;
	276	}
	277
fac35061	278	static int sony_acpi_resume(struct acpi_device *device)
3f4f461f AM	279	{
	280	struct sony_acpi_value *item;
	281
	282	for (item = sony_acpi_values; item->name; item++) {
	283	int ret;
	284
	285	if (!item->valid)
	286	continue;
	287	ret = acpi_callsetfunc(sony_acpi_handle, item->acpiset,
	288	item->value, NULL);
	289	if (ret < 0) {
	290	printk("%s: %d\n", __FUNCTION__, ret);
	291	break;
	292	}
	293	}
	294	return 0;
	295	}
	296
7f09c432 SP	297	static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
7f09c432 SP	298	{
c561162f SP	299	if (debug)
	300	printk(LOG_PFX "sony_acpi_notify, event: %d\n", event);
	301	acpi_bus_generate_event(sony_acpi_acpi_device, 1, event);
7f09c432 SP	302	}
	303
	304	static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
	305	void context, void *return_value)
	306	{
	307	struct acpi_namespace_node *node;
	308	union acpi_operand_object *operand;
	309
	310	node = (struct acpi_namespace_node *) handle;
	311	operand = (union acpi_operand_object *) node->object;
	312
	313	printk(LOG_PFX "method: name: %4.4s, args %X\n", node->name.ascii,
	314	(u32) operand->method.param_count);
	315
	316	return AE_OK;
	317	}
	318
	319	static int sony_acpi_add(struct acpi_device *device)
	320	{
	321	acpi_status status;
	322	int result;
50f62afb	323	acpi_handle handle;
05e2d827	324	mode_t proc_file_mode;
7f09c432 SP	325	struct sony_acpi_value *item;
7f09c432 SP	326
c561162f SP	327	sony_acpi_acpi_device = device;
c561162f SP	328
7f09c432 SP	329	sony_acpi_handle = device->handle;
	330
	331	acpi_driver_data(device) = NULL;
	332	acpi_device_dir(device) = sony_acpi_dir;
	333
	334	if (debug) {
	335	status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_acpi_handle,
	336	1, sony_walk_callback, NULL, NULL);
	337	if (ACPI_FAILURE(status)) {
	338	printk(LOG_PFX "unable to walk acpi resources\n");
	339	result = -ENODEV;
	340	goto outwalk;
	341	}
c561162f	342	}
7f09c432	343
c561162f SP	344	status = acpi_install_notify_handler(sony_acpi_handle,
	345	ACPI_DEVICE_NOTIFY,
	346	sony_acpi_notify,
	347	NULL);
	348	if (ACPI_FAILURE(status)) {
	349	printk(LOG_PFX "unable to install notify handler\n");
	350	result = -ENODEV;
	351	goto outnotify;
7f09c432 SP	352	}
7f09c432 SP	353
50f62afb AG	354	if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) {
50f62afb AG	355	sony_backlight_device = backlight_device_register("sony", NULL,
82c47731	356	NULL, &sony_backlight_properties);
50f62afb AG	357	if (IS_ERR(sony_backlight_device)) {
	358	printk(LOG_PFX "unable to register backlight device\n");
	359	}
	360	}
7f09c432	361
50f62afb	362	for (item = sony_acpi_values; item->name; ++item) {
05e2d827 MD	363	proc_file_mode = 0;
05e2d827 MD	364
7f09c432 SP	365	if (!debug && item->debug)
	366	continue;
	367
57ede701 MD	368	if (item->acpiget) {
	369	if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
	370	item->acpiget, &handle)))
	371	continue;
05e2d827	372
57ede701 MD	373	proc_file_mode \|= S_IRUSR;
	374	}
	375
	376	if (item->acpiset) {
	377	if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
	378	item->acpiset, &handle)))
	379	continue;
	380
	381	proc_file_mode \|= S_IWUSR;
	382	}
7f09c432	383
05e2d827	384	item->proc = create_proc_entry(item->name, proc_file_mode,
57ede701	385	acpi_device_dir(device));
7f09c432 SP	386	if (!item->proc) {
	387	printk(LOG_PFX "unable to create proc entry\n");
	388	result = -EIO;
	389	goto outproc;
	390	}
	391
	392	item->proc->read_proc = sony_acpi_read;
	393	item->proc->write_proc = sony_acpi_write;
	394	item->proc->data = item;
	395	item->proc->owner = THIS_MODULE;
	396	}
	397
	398	printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n");
	399
	400	return 0;
	401
	402	outproc:
05e2d827 MD	403	for (item = sony_acpi_values; item->name; ++item)
	404	if (item->proc)
	405	remove_proc_entry(item->name, acpi_device_dir(device));
	406	outnotify:
c561162f SP	407	status = acpi_remove_notify_handler(sony_acpi_handle,
	408	ACPI_DEVICE_NOTIFY,
	409	sony_acpi_notify);
	410	if (ACPI_FAILURE(status))
	411	printk(LOG_PFX "unable to remove notify handler\n");
7f09c432 SP	412	outwalk:
	413	return result;
	414	}
	415
7f09c432 SP	416	static int sony_acpi_remove(struct acpi_device *device, int type)
	417	{
	418	acpi_status status;
	419	struct sony_acpi_value *item;
	420
50f62afb AG	421	if (sony_backlight_device)
	422	backlight_device_unregister(sony_backlight_device);
	423
c561162f SP	424	sony_acpi_acpi_device = NULL;
	425
	426	status = acpi_remove_notify_handler(sony_acpi_handle,
	427	ACPI_DEVICE_NOTIFY,
	428	sony_acpi_notify);
	429	if (ACPI_FAILURE(status))
	430	printk(LOG_PFX "unable to remove notify handler\n");
7f09c432 SP	431
	432	for (item = sony_acpi_values; item->name; ++item)
	433	if (item->proc)
	434	remove_proc_entry(item->name, acpi_device_dir(device));
	435
	436	printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n");
	437
	438	return 0;
	439	}
	440
50f62afb AG	441	static int sony_backlight_update_status(struct backlight_device *bd)
	442	{
	443	return acpi_callsetfunc(sony_acpi_handle, "SBRT",
	444	bd->props->brightness + 1,
	445	NULL);
	446	}
	447
	448	static int sony_backlight_get_brightness(struct backlight_device *bd)
	449	{
	450	int value;
	451
	452	if (acpi_callgetfunc(sony_acpi_handle, "GBRT", &value))
	453	return 0;
	454	/* brightness levels are 1-based, while backlight ones are 0-based */
	455	return value - 1;
	456	}
	457
3f4f461f AM	458	static struct acpi_driver sony_acpi_driver = {
	459	.name = ACPI_SNC_DRIVER_NAME,
	460	.class = ACPI_SNC_CLASS,
	461	.ids = ACPI_SNC_HID,
	462	.ops = {
	463	.add = sony_acpi_add,
	464	.remove = sony_acpi_remove,
	465	.resume = sony_acpi_resume,
	466	},
	467	};
	468
7f09c432 SP	469	static int __init sony_acpi_init(void)
	470	{
	471	int result;
	472
	473	sony_acpi_dir = proc_mkdir("sony", acpi_root_dir);
	474	if (!sony_acpi_dir) {
	475	printk(LOG_PFX "unable to create /proc entry\n");
	476	return -ENODEV;
	477	}
	478	sony_acpi_dir->owner = THIS_MODULE;
	479
	480	result = acpi_bus_register_driver(&sony_acpi_driver);
	481	if (result < 0) {
	482	remove_proc_entry("sony", acpi_root_dir);
	483	return -ENODEV;
	484	}
	485	return 0;
	486	}
	487
	488
	489	static void __exit sony_acpi_exit(void)
	490	{
	491	acpi_bus_unregister_driver(&sony_acpi_driver);
	492	remove_proc_entry("sony", acpi_root_dir);
	493	}
	494
	495	module_init(sony_acpi_init);
	496	module_exit(sony_acpi_exit);