[net-next-2.6.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 <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 v0.2"

#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 int sony_acpi_add (struct acpi_device *device);
static int sony_acpi_remove (struct acpi_device *device, int type);

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,
		  },
};

static acpi_handle sony_acpi_handle;
static struct proc_dir_entry *sony_acpi_dir;

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			debug;	 /* active only in debug mode ? */
} sony_acpi_values[] = {
	{
		.name		= "brightness",
		.acpiget	= "GBRT",
		.acpiset	= "SBRT",
		.min		= 1,
		.max		= 8,
		.debug		= 0,
	},
	{
		.name		= "brightness_default",
		.acpiget	= "GPBR",
		.acpiset	= "SPBR",
		.min		= 1,
		.max		= 8,
		.debug		= 0,
	},
	{
		.name           = "fnkey",
		.acpiget        = "GHKE",
		.debug          = 0,
	},
	{
		.name		= "cdpower",
		.acpiget	= "GCDP",
		.acpiset	= "SCDP",
		.min		= -1,
		.max		= -1,
		.debug		= 0,
	},
	{
		.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;

	return count;
}

static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
{
	printk(LOG_PFX "sony_acpi_notify\n");
}

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;
	struct sony_acpi_value *item;

	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;
		}
	}

	for (item = sony_acpi_values; item->name; ++item) {
		acpi_handle handle;

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

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

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

		item->proc = create_proc_entry(item->name, 0600,
					       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:
	if (debug) {
		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");
	}
outnotify:
	for (item = sony_acpi_values; item->name; ++item)
		if (item->proc)
			remove_proc_entry(item->name, acpi_device_dir(device));
outwalk:
	return result;
}


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

	if (debug) {
		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 __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>
	30	#include <acpi/acpi_drivers.h>
	31	#include <acpi/acpi_bus.h>
	32	#include <asm/uaccess.h>
	33
	34	#define ACPI_SNC_CLASS "sony"
	35	#define ACPI_SNC_HID "SNY5001"
	36	#define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.2"
	37
	38	#define LOG_PFX KERN_WARNING "sony_acpi: "
	39
	40	MODULE_AUTHOR("Stelian Pop");
	41	MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME);
	42	MODULE_LICENSE("GPL");
	43
	44	static int debug;
	45	module_param(debug, int, 0);
	46	MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
	47	"the development of this driver");
	48
	49	static int sony_acpi_add (struct acpi_device *device);
	50	static int sony_acpi_remove (struct acpi_device *device, int type);
	51
	52	static struct acpi_driver sony_acpi_driver = {
	53	.name = ACPI_SNC_DRIVER_NAME,
	54	.class = ACPI_SNC_CLASS,
	55	.ids = ACPI_SNC_HID,
	56	.ops = {
	57	.add = sony_acpi_add,
	58	.remove = sony_acpi_remove,
	59	},
	60	};
	61
	62	static acpi_handle sony_acpi_handle;
	63	static struct proc_dir_entry *sony_acpi_dir;
	64
65	static struct sony_acpi_value {
66	char name; / name of the entry */
67	struct proc_dir_entry proc; / /proc entry */
68	char acpiget;/ name of the ACPI get function */
69	char acpiset;/ name of the ACPI get function */
70	int min; /* minimum allowed value or -1 */
71	int max; /* maximum allowed value or -1 */
72	int debug; /* active only in debug mode ? */
73	} sony_acpi_values[] = {
74	{
75	.name = "brightness",
76	.acpiget = "GBRT",
77	.acpiset = "SBRT",
78	.min = 1,
79	.max = 8,
80	.debug = 0,
81	},
82	{
83	.name = "brightness_default",
84	.acpiget = "GPBR",
85	.acpiset = "SPBR",
86	.min = 1,
87	.max = 8,
88	.debug = 0,
89	},
90	{
91	.name = "fnkey",
92	.acpiget = "GHKE",
93	.debug = 0,
94	},
95	{
96	.name = "cdpower",
97	.acpiget = "GCDP",
98	.acpiset = "SCDP",
99	.min = -1,
100	.max = -1,
101	.debug = 0,
102	},
103	{
104	.name = "PID",
105	.acpiget = "GPID",
106	.debug = 1,
107	},
108	{
109	.name = "CTR",
110	.acpiget = "GCTR",
111	.acpiset = "SCTR",
112	.min = -1,
113	.max = -1,
114	.debug = 1,
115	},
116	{
117	.name = "PCR",
118	.acpiget = "GPCR",
119	.acpiset = "SPCR",
120	.min = -1,
121	.max = -1,
122	.debug = 1,
123	},
124	{
125	.name = "CMI",
126	.acpiget = "GCMI",
127	.acpiset = "SCMI",
128	.min = -1,
129	.max = -1,
130	.debug = 1,
131	},
132	{
133	.name = NULL,
134	}
135	};
136
137	static int acpi_callgetfunc(acpi_handle handle, char name, int result)
138	{
139	struct acpi_buffer output;
140	union acpi_object out_obj;
141	acpi_status status;
142
143	output.length = sizeof(out_obj);
144	output.pointer = &out_obj;
145
146	status = acpi_evaluate_object(handle, name, NULL, &output);
147	if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) {
148	*result = out_obj.integer.value;
149	return 0;
150	}
151
152	printk(LOG_PFX "acpi_callreadfunc failed\n");
153
154	return -1;
155	}
156
157	static int acpi_callsetfunc(acpi_handle handle, char *name, int value,
158	int *result)
159	{
160	struct acpi_object_list params;
161	union acpi_object in_obj;
162	struct acpi_buffer output;
163	union acpi_object out_obj;
164	acpi_status status;
165
166	params.count = 1;
167	params.pointer = &in_obj;
168	in_obj.type = ACPI_TYPE_INTEGER;
169	in_obj.integer.value = value;
170
171	output.length = sizeof(out_obj);
172	output.pointer = &out_obj;
173
174	status = acpi_evaluate_object(handle, name, &params, &output);
175	if (status == AE_OK) {
176	if (result != NULL) {
177	if (out_obj.type != ACPI_TYPE_INTEGER) {
178	printk(LOG_PFX "acpi_evaluate_object bad "
179	"return type\n");
180	return -1;
181	}
182	*result = out_obj.integer.value;
183	}
184	return 0;
185	}
186
187	printk(LOG_PFX "acpi_evaluate_object failed\n");
188
189	return -1;
190	}
191
192	static int parse_buffer(const char __user *buffer, unsigned long count,
193	int *val) {
194	char s[32];
195	int ret;
196
197	if (count > 31)
198	return -EINVAL;
199	if (copy_from_user(s, buffer, count))
200	return -EFAULT;
201	s[count] = '\0';
202	ret = simple_strtoul(s, NULL, 10);
203	*val = ret;
204	return 0;
205	}
206
207	static int sony_acpi_read(char* page, char** start, off_t off, int count,
208	int* eof, void *data)
209	{
210	struct sony_acpi_value *item = data;
211	int value;
212
213	if (!item->acpiget)
214	return -EIO;
215
216	if (acpi_callgetfunc(sony_acpi_handle, item->acpiget, &value) < 0)
217	return -EIO;
218
219	return sprintf(page, "%d\n", value);
220	}
221
222	static int sony_acpi_write(struct file file, const char __user buffer,
223	unsigned long count, void *data)
224	{
225	struct sony_acpi_value *item = data;
226	int result;
227	int value;
228
229	if (!item->acpiset)
230	return -EIO;
231
232	if ((result = parse_buffer(buffer, count, &value)) < 0)
233	return result;
234
235	if (item->min != -1 && value < item->min)
236	return -EINVAL;
237	if (item->max != -1 && value > item->max)
238	return -EINVAL;
239
240	if (acpi_callsetfunc(sony_acpi_handle, item->acpiset, value, NULL) < 0)
241	return -EIO;
242
243	return count;
244	}
245
246	static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
247	{
248	printk(LOG_PFX "sony_acpi_notify\n");
249	}
250
251	static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
252	void context, void *return_value)
253	{
254	struct acpi_namespace_node *node;
255	union acpi_operand_object *operand;
256
257	node = (struct acpi_namespace_node *) handle;
258	operand = (union acpi_operand_object *) node->object;
259
260	printk(LOG_PFX "method: name: %4.4s, args %X\n", node->name.ascii,
261	(u32) operand->method.param_count);
262
263	return AE_OK;
264	}
265
266	static int sony_acpi_add(struct acpi_device *device)
267	{
268	acpi_status status;
269	int result;
270	struct sony_acpi_value *item;
271
272	sony_acpi_handle = device->handle;
273
274	acpi_driver_data(device) = NULL;
275	acpi_device_dir(device) = sony_acpi_dir;
276
277	if (debug) {
278	status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_acpi_handle,
279	1, sony_walk_callback, NULL, NULL);
280	if (ACPI_FAILURE(status)) {
281	printk(LOG_PFX "unable to walk acpi resources\n");
282	result = -ENODEV;
283	goto outwalk;
284	}
285
286	status = acpi_install_notify_handler(sony_acpi_handle,
287	ACPI_DEVICE_NOTIFY,
288	sony_acpi_notify,
289	NULL);
290	if (ACPI_FAILURE(status)) {
291	printk(LOG_PFX "unable to install notify handler\n");
292	result = -ENODEV;
293	goto outnotify;
294	}
295	}
296
297	for (item = sony_acpi_values; item->name; ++item) {
298	acpi_handle handle;
299
300	if (!debug && item->debug)
301	continue;
302
303	if (item->acpiget &&
304	ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
305	item->acpiget, &handle)))
306	continue;
307
308	if (item->acpiset &&
309	ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
310	item->acpiset, &handle)))
311	continue;
312
313	item->proc = create_proc_entry(item->name, 0600,
314	acpi_device_dir(device));
315	if (!item->proc) {
316	printk(LOG_PFX "unable to create proc entry\n");
317	result = -EIO;
318	goto outproc;
319	}
320
321	item->proc->read_proc = sony_acpi_read;
322	item->proc->write_proc = sony_acpi_write;
323	item->proc->data = item;
324	item->proc->owner = THIS_MODULE;
325	}
326
327	printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n");
328
329	return 0;
330
331	outproc:
332	if (debug) {
333	status = acpi_remove_notify_handler(sony_acpi_handle,
334	ACPI_DEVICE_NOTIFY,
335	sony_acpi_notify);
336	if (ACPI_FAILURE(status))
337	printk(LOG_PFX "unable to remove notify handler\n");
338	}
339	outnotify:
340	for (item = sony_acpi_values; item->name; ++item)
341	if (item->proc)
342	remove_proc_entry(item->name, acpi_device_dir(device));
343	outwalk:
344	return result;
345	}
346
347
348	static int sony_acpi_remove(struct acpi_device *device, int type)
349	{
350	acpi_status status;
351	struct sony_acpi_value *item;
352
353	if (debug) {
354	status = acpi_remove_notify_handler(sony_acpi_handle,
355	ACPI_DEVICE_NOTIFY,
356	sony_acpi_notify);
357	if (ACPI_FAILURE(status))
358	printk(LOG_PFX "unable to remove notify handler\n");
359	}
360
361	for (item = sony_acpi_values; item->name; ++item)
362	if (item->proc)
363	remove_proc_entry(item->name, acpi_device_dir(device));
364
365	printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n");
366
367	return 0;
368	}
369
370	static int __init sony_acpi_init(void)
371	{
372	int result;
373
374	sony_acpi_dir = proc_mkdir("sony", acpi_root_dir);
375	if (!sony_acpi_dir) {
376	printk(LOG_PFX "unable to create /proc entry\n");
377	return -ENODEV;
378	}
379	sony_acpi_dir->owner = THIS_MODULE;
380
381	result = acpi_bus_register_driver(&sony_acpi_driver);
382	if (result < 0) {
383	remove_proc_entry("sony", acpi_root_dir);
384	return -ENODEV;
385	}
386	return 0;
387	}
388
389
390	static void __exit sony_acpi_exit(void)
391	{
392	acpi_bus_unregister_driver(&sony_acpi_driver);
393	remove_proc_entry("sony", acpi_root_dir);
394	}
395
396	module_init(sony_acpi_init);
397	module_exit(sony_acpi_exit);