[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / system.c

/*
 *  acpi_system.c - ACPI System Driver ($Revision: 63 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <asm/uaccess.h>

#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("system");
#ifdef MODULE_PARAM_PREFIX
#undef MODULE_PARAM_PREFIX
#endif
#define MODULE_PARAM_PREFIX "acpi."

#define ACPI_SYSTEM_CLASS		"system"
#define ACPI_SYSTEM_DEVICE_NAME		"System"

u32 acpi_irq_handled;

/*
 * Make ACPICA version work as module param
 */
static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
{
	int result;

	result = sprintf(buffer, "%x", ACPI_CA_VERSION);

	return result;
}

module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);

/* --------------------------------------------------------------------------
                              FS Interface (/sys)
   -------------------------------------------------------------------------- */
static LIST_HEAD(acpi_table_attr_list);
static struct kobject *tables_kobj;

struct acpi_table_attr {
	struct bin_attribute attr;
	char name[8];
	int instance;
	struct list_head node;
};

static ssize_t acpi_table_show(struct kobject *kobj,
			       struct bin_attribute *bin_attr, char *buf,
			       loff_t offset, size_t count)
{
	struct acpi_table_attr *table_attr =
	    container_of(bin_attr, struct acpi_table_attr, attr);
	struct acpi_table_header *table_header = NULL;
	acpi_status status;

	status =
	    acpi_get_table(table_attr->name, table_attr->instance,
			   &table_header);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	return memory_read_from_buffer(buf, count, &offset,
					table_header, table_header->length);
}

static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
				 struct acpi_table_header *table_header)
{
	struct acpi_table_header *header = NULL;
	struct acpi_table_attr *attr = NULL;

	memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE);

	list_for_each_entry(attr, &acpi_table_attr_list, node) {
		if (!memcmp(table_header->signature, attr->name,
			    ACPI_NAME_SIZE))
			if (table_attr->instance < attr->instance)
				table_attr->instance = attr->instance;
	}
	table_attr->instance++;

	if (table_attr->instance > 1 || (table_attr->instance == 1 &&
					 !acpi_get_table(table_header->
							 signature, 2,
							 &header)))
		sprintf(table_attr->name + 4, "%d", table_attr->instance);

	table_attr->attr.size = 0;
	table_attr->attr.read = acpi_table_show;
	table_attr->attr.attr.name = table_attr->name;
	table_attr->attr.attr.mode = 0444;
	table_attr->attr.attr.owner = THIS_MODULE;

	return;
}

static int acpi_system_sysfs_init(void)
{
	struct acpi_table_attr *table_attr;
	struct acpi_table_header *table_header = NULL;
	int table_index = 0;
	int result;

	tables_kobj = kobject_create_and_add("tables", acpi_kobj);
	if (!tables_kobj)
		return -ENOMEM;

	do {
		result = acpi_get_table_by_index(table_index, &table_header);
		if (!result) {
			table_index++;
			table_attr = NULL;
			table_attr =
			    kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
			if (!table_attr)
				return -ENOMEM;

			acpi_table_attr_init(table_attr, table_header);
			result =
			    sysfs_create_bin_file(tables_kobj,
						  &table_attr->attr);
			if (result) {
				kfree(table_attr);
				return result;
			} else
				list_add_tail(&table_attr->node,
					      &acpi_table_attr_list);
		}
	} while (!result);
	kobject_uevent(tables_kobj, KOBJ_ADD);

	return 0;
}

/*
 * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
 * See Documentation/ABI/testing/sysfs-firmware-acpi
 */

#define COUNT_GPE 0
#define COUNT_SCI 1	/* acpi_irq_handled */
#define COUNT_ERROR 2	/* other */
#define NUM_COUNTERS_EXTRA 3

static u32 *all_counters;
static u32 num_gpes;
static u32 num_counters;
static struct attribute **all_attrs;
static u32 acpi_gpe_count;

static struct attribute_group interrupt_stats_attr_group = {
	.name = "interrupts",
};
static struct kobj_attribute *counter_attrs;

static int count_num_gpes(void)
{
	int count = 0;
	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
	struct acpi_gpe_block_info *gpe_block;
	acpi_cpu_flags flags;

	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);

	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
	while (gpe_xrupt_info) {
		gpe_block = gpe_xrupt_info->gpe_block_list_head;
		while (gpe_block) {
			count += gpe_block->register_count *
			    ACPI_GPE_REGISTER_WIDTH;
			gpe_block = gpe_block->next;
		}
		gpe_xrupt_info = gpe_xrupt_info->next;
	}
	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);

	return count;
}

static void delete_gpe_attr_array(void)
{
	u32 *tmp = all_counters;

	all_counters = NULL;
	kfree(tmp);

	if (counter_attrs) {
		int i;

		for (i = 0; i < num_gpes; i++)
			kfree(counter_attrs[i].attr.name);

		kfree(counter_attrs);
	}
	kfree(all_attrs);

	return;
}

void acpi_os_gpe_count(u32 gpe_number)
{
	acpi_gpe_count++;

	if (!all_counters)
		return;

	if (gpe_number < num_gpes)
		all_counters[gpe_number]++;
	else
		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;

	return;
}

void acpi_os_fixed_event_count(u32 event_number)
{
	if (!all_counters)
		return;

	if (event_number < ACPI_NUM_FIXED_EVENTS)
		all_counters[num_gpes + event_number]++;
	else
		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;

	return;
}

static ssize_t counter_show(struct kobject *kobj,
	struct kobj_attribute *attr, char *buf)
{
	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI] =
		acpi_irq_handled;
	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE] =
		acpi_gpe_count;

	return sprintf(buf, "%d\n", all_counters[attr - counter_attrs]);
}

/*
 * counter_set() sets the specified counter.
 * setting the total "sci" file to any value clears all counters.
 */
static ssize_t counter_set(struct kobject *kobj,
	struct kobj_attribute *attr, const char *buf, size_t size)
{
	int index = attr - counter_attrs;

	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
		int i;
		for (i = 0; i < num_counters; ++i)
			all_counters[i] = 0;
		acpi_gpe_count = 0;
		acpi_irq_handled = 0;

	} else
		all_counters[index] = strtoul(buf, NULL, 0);

	return size;
}

void acpi_irq_stats_init(void)
{
	int i;

	if (all_counters)
		return;

	num_gpes = count_num_gpes();
	num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;

	all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
			GFP_KERNEL);
	if (all_attrs == NULL)
		return;

	all_counters = kzalloc(sizeof(u32) * (num_counters), GFP_KERNEL);
	if (all_counters == NULL)
		goto fail;

	counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
			GFP_KERNEL);
	if (counter_attrs == NULL)
		goto fail;

	for (i = 0; i < num_counters; ++i) {
		char buffer[12];
		char *name;

		if (i < num_gpes)
			sprintf(buffer, "gpe%02X", i);
		else if (i == num_gpes + ACPI_EVENT_PMTIMER)
			sprintf(buffer, "ff_pmtimer");
		else if (i == num_gpes + ACPI_EVENT_GLOBAL)
			sprintf(buffer, "ff_gbl_lock");
		else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
			sprintf(buffer, "ff_pwr_btn");
		else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
			sprintf(buffer, "ff_slp_btn");
		else if (i == num_gpes + ACPI_EVENT_RTC)
			sprintf(buffer, "ff_rt_clk");
		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
			sprintf(buffer, "gpe_all");
		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
			sprintf(buffer, "sci");
		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
			sprintf(buffer, "error");
		else
			sprintf(buffer, "bug%02X", i);

		name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
		if (name == NULL)
			goto fail;
		strncpy(name, buffer, strlen(buffer) + 1);

		counter_attrs[i].attr.name = name;
		counter_attrs[i].attr.mode = 0644;
		counter_attrs[i].show = counter_show;
		counter_attrs[i].store = counter_set;

		all_attrs[i] = &counter_attrs[i].attr;
	}

	interrupt_stats_attr_group.attrs = all_attrs;
	if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
		return;

fail:
	delete_gpe_attr_array();
	return;
}

static void __exit interrupt_stats_exit(void)
{
	sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);

	delete_gpe_attr_array();

	return;
}

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS
#define ACPI_SYSTEM_FILE_INFO		"info"
#define ACPI_SYSTEM_FILE_EVENT		"event"
#define ACPI_SYSTEM_FILE_DSDT		"dsdt"
#define ACPI_SYSTEM_FILE_FADT		"fadt"

static int acpi_system_read_info(struct seq_file *seq, void *offset)
{

	seq_printf(seq, "version:                 %x\n", ACPI_CA_VERSION);
	return 0;
}

static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_system_read_info, PDE(inode)->data);
}

static const struct file_operations acpi_system_info_ops = {
	.owner = THIS_MODULE,
	.open = acpi_system_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
				     loff_t *);

static const struct file_operations acpi_system_dsdt_ops = {
	.owner = THIS_MODULE,
	.read = acpi_system_read_dsdt,
};

static ssize_t
acpi_system_read_dsdt(struct file *file,
		      char __user * buffer, size_t count, loff_t * ppos)
{
	acpi_status status = AE_OK;
	struct acpi_table_header *dsdt = NULL;
	ssize_t res;

	status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);

	return res;
}

static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
				     loff_t *);

static const struct file_operations acpi_system_fadt_ops = {
	.owner = THIS_MODULE,
	.read = acpi_system_read_fadt,
};

static ssize_t
acpi_system_read_fadt(struct file *file,
		      char __user * buffer, size_t count, loff_t * ppos)
{
	acpi_status status = AE_OK;
	struct acpi_table_header *fadt = NULL;
	ssize_t res;

	status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);

	return res;
}

static int acpi_system_procfs_init(void)
{
	struct proc_dir_entry *entry;
	int error = 0;

	/* 'info' [R] */
	entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
			    &acpi_system_info_ops);
	if (!entry)
		goto Error;

	/* 'dsdt' [R] */
	entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
			    &acpi_system_dsdt_ops);
	if (!entry)
		goto Error;

	/* 'fadt' [R] */
	entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
			    &acpi_system_fadt_ops);
	if (!entry)
		goto Error;

      Done:
	return error;

      Error:
	remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
	remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
	remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);

	error = -EFAULT;
	goto Done;
}
#else
static int acpi_system_procfs_init(void)
{
	return 0;
}
#endif

static int __init acpi_system_init(void)
{
	int result = 0;

	if (acpi_disabled)
		return 0;

	result = acpi_system_procfs_init();
	if (result)
		return result;

	result = acpi_system_sysfs_init();

	return result;
}

subsys_initcall(acpi_system_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* acpi_system.c - ACPI System Driver ($Revision: 63 $)
	3	*
	4	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	6	*
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	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 (at
	12	* your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#include <linux/proc_fs.h>
	27	#include <linux/seq_file.h>
	28	#include <linux/init.h>
	29	#include <asm/uaccess.h>
	30
	31	#include <acpi/acpi_drivers.h>
	32
1da177e4	33	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	34	ACPI_MODULE_NAME("system");
5bb730fd ZR	35	#ifdef MODULE_PARAM_PREFIX
	36	#undef MODULE_PARAM_PREFIX
	37	#endif
	38	#define MODULE_PARAM_PREFIX "acpi."
	39
1da177e4	40	#define ACPI_SYSTEM_CLASS "system"
1da177e4	41	#define ACPI_SYSTEM_DEVICE_NAME "System"
1da177e4	42
5229e87d LB	43	u32 acpi_irq_handled;
5229e87d LB	44
5bb730fd ZR	45	/*
	46	* Make ACPICA version work as module param
	47	*/
d4c5f047 ZR	48	static int param_get_acpica_version(char buffer, struct kernel_param kp)
d4c5f047 ZR	49	{
5bb730fd ZR	50	int result;
	51
	52	result = sprintf(buffer, "%x", ACPI_CA_VERSION);
	53
	54	return result;
	55	}
	56
	57	module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
	58
d4c5f047 ZR	59	/* --------------------------------------------------------------------------
	60	FS Interface (/sys)
	61	-------------------------------------------------------------------------- */
	62	static LIST_HEAD(acpi_table_attr_list);
a77aa28a	63	static struct kobject *tables_kobj;
d4c5f047 ZR	64
	65	struct acpi_table_attr {
	66	struct bin_attribute attr;
	67	char name[8];
	68	int instance;
	69	struct list_head node;
	70	};
	71
	72	static ssize_t acpi_table_show(struct kobject *kobj,
	73	struct bin_attribute bin_attr, char buf,
	74	loff_t offset, size_t count)
	75	{
	76	struct acpi_table_attr *table_attr =
	77	container_of(bin_attr, struct acpi_table_attr, attr);
	78	struct acpi_table_header *table_header = NULL;
	79	acpi_status status;
d4c5f047 ZR	80
	81	status =
	82	acpi_get_table(table_attr->name, table_attr->instance,
	83	&table_header);
	84	if (ACPI_FAILURE(status))
	85	return -ENODEV;
	86
46a21e46 AM	87	return memory_read_from_buffer(buf, count, &offset,
46a21e46 AM	88	table_header, table_header->length);
d4c5f047 ZR	89	}
	90
	91	static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
	92	struct acpi_table_header *table_header)
	93	{
	94	struct acpi_table_header *header = NULL;
	95	struct acpi_table_attr *attr = NULL;
	96
	97	memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE);
	98
	99	list_for_each_entry(attr, &acpi_table_attr_list, node) {
	100	if (!memcmp(table_header->signature, attr->name,
	101	ACPI_NAME_SIZE))
	102	if (table_attr->instance < attr->instance)
	103	table_attr->instance = attr->instance;
	104	}
	105	table_attr->instance++;
	106
	107	if (table_attr->instance > 1 \|\| (table_attr->instance == 1 &&
	108	!acpi_get_table(table_header->
	109	signature, 2,
	110	&header)))
	111	sprintf(table_attr->name + 4, "%d", table_attr->instance);
	112
	113	table_attr->attr.size = 0;
	114	table_attr->attr.read = acpi_table_show;
	115	table_attr->attr.attr.name = table_attr->name;
	116	table_attr->attr.attr.mode = 0444;
	117	table_attr->attr.attr.owner = THIS_MODULE;
	118
	119	return;
	120	}
	121
	122	static int acpi_system_sysfs_init(void)
	123	{
	124	struct acpi_table_attr *table_attr;
	125	struct acpi_table_header *table_header = NULL;
	126	int table_index = 0;
	127	int result;
	128
a77aa28a GKH	129	tables_kobj = kobject_create_and_add("tables", acpi_kobj);
	130	if (!tables_kobj)
	131	return -ENOMEM;
d4c5f047 ZR	132
	133	do {
	134	result = acpi_get_table_by_index(table_index, &table_header);
	135	if (!result) {
	136	table_index++;
	137	table_attr = NULL;
	138	table_attr =
	139	kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
	140	if (!table_attr)
	141	return -ENOMEM;
	142
	143	acpi_table_attr_init(table_attr, table_header);
	144	result =
a77aa28a	145	sysfs_create_bin_file(tables_kobj,
d4c5f047 ZR	146	&table_attr->attr);
	147	if (result) {
	148	kfree(table_attr);
	149	return result;
	150	} else
	151	list_add_tail(&table_attr->node,
	152	&acpi_table_attr_list);
	153	}
	154	} while (!result);
a77aa28a	155	kobject_uevent(tables_kobj, KOBJ_ADD);
d4c5f047 ZR	156
	157	return 0;
	158	}
	159
5229e87d LB	160	/*
	161	* Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
	162	* See Documentation/ABI/testing/sysfs-firmware-acpi
	163	*/
	164
	165	#define COUNT_GPE 0
	166	#define COUNT_SCI 1 /* acpi_irq_handled */
	167	#define COUNT_ERROR 2 /* other */
	168	#define NUM_COUNTERS_EXTRA 3
	169
	170	static u32 *all_counters;
	171	static u32 num_gpes;
	172	static u32 num_counters;
	173	static struct attribute **all_attrs;
	174	static u32 acpi_gpe_count;
	175
	176	static struct attribute_group interrupt_stats_attr_group = {
	177	.name = "interrupts",
	178	};
	179	static struct kobj_attribute *counter_attrs;
	180
	181	static int count_num_gpes(void)
	182	{
	183	int count = 0;
	184	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
	185	struct acpi_gpe_block_info *gpe_block;
	186	acpi_cpu_flags flags;
	187
	188	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
	189
	190	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
	191	while (gpe_xrupt_info) {
	192	gpe_block = gpe_xrupt_info->gpe_block_list_head;
	193	while (gpe_block) {
	194	count += gpe_block->register_count *
	195	ACPI_GPE_REGISTER_WIDTH;
	196	gpe_block = gpe_block->next;
	197	}
	198	gpe_xrupt_info = gpe_xrupt_info->next;
	199	}
	200	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
	201
	202	return count;
	203	}
	204
	205	static void delete_gpe_attr_array(void)
	206	{
	207	u32 *tmp = all_counters;
	208
	209	all_counters = NULL;
	210	kfree(tmp);
	211
	212	if (counter_attrs) {
	213	int i;
	214
	215	for (i = 0; i < num_gpes; i++)
	216	kfree(counter_attrs[i].attr.name);
	217
	218	kfree(counter_attrs);
	219	}
	220	kfree(all_attrs);
	221
	222	return;
	223	}
224
225	void acpi_os_gpe_count(u32 gpe_number)
226	{
227	acpi_gpe_count++;
228
229	if (!all_counters)
230	return;
231
232	if (gpe_number < num_gpes)
233	all_counters[gpe_number]++;
234	else
235	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
236
237	return;
238	}
239
240	void acpi_os_fixed_event_count(u32 event_number)
241	{
242	if (!all_counters)
243	return;
244
245	if (event_number < ACPI_NUM_FIXED_EVENTS)
246	all_counters[num_gpes + event_number]++;
247	else
248	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
249
250	return;
251	}
252
253	static ssize_t counter_show(struct kobject *kobj,
254	struct kobj_attribute attr, char buf)
255	{
256	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI] =
257	acpi_irq_handled;
258	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE] =
259	acpi_gpe_count;
260
261	return sprintf(buf, "%d\n", all_counters[attr - counter_attrs]);
262	}
263
264	/*
265	* counter_set() sets the specified counter.
266	* setting the total "sci" file to any value clears all counters.
267	*/
268	static ssize_t counter_set(struct kobject *kobj,
269	struct kobj_attribute attr, const char buf, size_t size)
270	{
271	int index = attr - counter_attrs;
272
273	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
274	int i;
275	for (i = 0; i < num_counters; ++i)
276	all_counters[i] = 0;
277	acpi_gpe_count = 0;
278	acpi_irq_handled = 0;
279
280	} else
281	all_counters[index] = strtoul(buf, NULL, 0);
282
283	return size;
284	}
285
286	void acpi_irq_stats_init(void)
287	{
288	int i;
289
290	if (all_counters)
291	return;
292
293	num_gpes = count_num_gpes();
294	num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
295
296	all_attrs = kzalloc(sizeof(struct attribute ) (num_counters + 1),
297	GFP_KERNEL);
298	if (all_attrs == NULL)
299	return;
300
301	all_counters = kzalloc(sizeof(u32) * (num_counters), GFP_KERNEL);
302	if (all_counters == NULL)
303	goto fail;
304
305	counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
306	GFP_KERNEL);
307	if (counter_attrs == NULL)
308	goto fail;
309
310	for (i = 0; i < num_counters; ++i) {
c8dc9de1	311	char buffer[12];
5229e87d LB	312	char *name;
	313
	314	if (i < num_gpes)
	315	sprintf(buffer, "gpe%02X", i);
	316	else if (i == num_gpes + ACPI_EVENT_PMTIMER)
	317	sprintf(buffer, "ff_pmtimer");
	318	else if (i == num_gpes + ACPI_EVENT_GLOBAL)
	319	sprintf(buffer, "ff_gbl_lock");
	320	else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
	321	sprintf(buffer, "ff_pwr_btn");
	322	else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
	323	sprintf(buffer, "ff_slp_btn");
	324	else if (i == num_gpes + ACPI_EVENT_RTC)
	325	sprintf(buffer, "ff_rt_clk");
	326	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
	327	sprintf(buffer, "gpe_all");
	328	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
	329	sprintf(buffer, "sci");
	330	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
	331	sprintf(buffer, "error");
	332	else
	333	sprintf(buffer, "bug%02X", i);
	334
	335	name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
	336	if (name == NULL)
	337	goto fail;
	338	strncpy(name, buffer, strlen(buffer) + 1);
	339
	340	counter_attrs[i].attr.name = name;
	341	counter_attrs[i].attr.mode = 0644;
	342	counter_attrs[i].show = counter_show;
	343	counter_attrs[i].store = counter_set;
	344
	345	all_attrs[i] = &counter_attrs[i].attr;
	346	}
	347
	348	interrupt_stats_attr_group.attrs = all_attrs;
b7143156 LB	349	if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
b7143156 LB	350	return;
5229e87d LB	351
	352	fail:
	353	delete_gpe_attr_array();
	354	return;
	355	}
	356
	357	static void __exit interrupt_stats_exit(void)
	358	{
	359	sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
	360
	361	delete_gpe_attr_array();
	362
	363	return;
	364	}
	365
1da177e4 LT	366	/* --------------------------------------------------------------------------
	367	FS Interface (/proc)
	368	-------------------------------------------------------------------------- */
5bb730fd	369	#ifdef CONFIG_ACPI_PROCFS
d4c5f047 ZR	370	#define ACPI_SYSTEM_FILE_INFO "info"
	371	#define ACPI_SYSTEM_FILE_EVENT "event"
	372	#define ACPI_SYSTEM_FILE_DSDT "dsdt"
	373	#define ACPI_SYSTEM_FILE_FADT "fadt"
1da177e4	374
4be44fcd	375	static int acpi_system_read_info(struct seq_file seq, void offset)
1da177e4	376	{
1da177e4 LT	377
1da177e4 LT	378	seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
d550d98d	379	return 0;
1da177e4 LT	380	}
	381
	382	static int acpi_system_info_open_fs(struct inode inode, struct file file)
	383	{
	384	return single_open(file, acpi_system_read_info, PDE(inode)->data);
	385	}
	386
d7508032	387	static const struct file_operations acpi_system_info_ops = {
cf7acfab	388	.owner = THIS_MODULE,
4be44fcd LB	389	.open = acpi_system_info_open_fs,
	390	.read = seq_read,
	391	.llseek = seq_lseek,
	392	.release = single_release,
1da177e4 LT	393	};
1da177e4 LT	394
4be44fcd LB	395	static ssize_t acpi_system_read_dsdt(struct file , char __user , size_t,
4be44fcd LB	396	loff_t *);
1da177e4	397
d7508032	398	static const struct file_operations acpi_system_dsdt_ops = {
cf7acfab	399	.owner = THIS_MODULE,
4be44fcd	400	.read = acpi_system_read_dsdt,
1da177e4 LT	401	};
	402
	403	static ssize_t
4be44fcd LB	404	acpi_system_read_dsdt(struct file *file,
4be44fcd LB	405	char __user * buffer, size_t count, loff_t * ppos)
1da177e4	406	{
4be44fcd	407	acpi_status status = AE_OK;
ad71860a	408	struct acpi_table_header *dsdt = NULL;
4be44fcd	409	ssize_t res;
1da177e4	410
ad71860a	411	status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
1da177e4	412	if (ACPI_FAILURE(status))
d550d98d	413	return -ENODEV;
1da177e4	414
d4c5f047	415	res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
1da177e4	416
d550d98d	417	return res;
1da177e4 LT	418	}
1da177e4 LT	419
4be44fcd LB	420	static ssize_t acpi_system_read_fadt(struct file , char __user , size_t,
4be44fcd LB	421	loff_t *);
1da177e4	422
d7508032	423	static const struct file_operations acpi_system_fadt_ops = {
cf7acfab	424	.owner = THIS_MODULE,
4be44fcd	425	.read = acpi_system_read_fadt,
1da177e4 LT	426	};
	427
	428	static ssize_t
4be44fcd LB	429	acpi_system_read_fadt(struct file *file,
4be44fcd LB	430	char __user * buffer, size_t count, loff_t * ppos)
1da177e4	431	{
4be44fcd	432	acpi_status status = AE_OK;
ad71860a	433	struct acpi_table_header *fadt = NULL;
4be44fcd	434	ssize_t res;
1da177e4	435
ad71860a	436	status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
1da177e4	437	if (ACPI_FAILURE(status))
d550d98d	438	return -ENODEV;
1da177e4	439
d4c5f047	440	res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
1da177e4	441
d550d98d	442	return res;
1da177e4 LT	443	}
1da177e4 LT	444
d4c5f047	445	static int acpi_system_procfs_init(void)
1da177e4	446	{
4be44fcd	447	struct proc_dir_entry *entry;
1da177e4	448	int error = 0;
1da177e4	449
1da177e4	450	/* 'info' [R] */
cf7acfab DL	451	entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
cf7acfab DL	452	&acpi_system_info_ops);
1da177e4 LT	453	if (!entry)
1da177e4 LT	454	goto Error;
1da177e4 LT	455
1da177e4 LT	456	/* 'dsdt' [R] */
cf7acfab DL	457	entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
	458	&acpi_system_dsdt_ops);
	459	if (!entry)
1da177e4 LT	460	goto Error;
	461
	462	/* 'fadt' [R] */
cf7acfab DL	463	entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
	464	&acpi_system_fadt_ops);
	465	if (!entry)
1da177e4 LT	466	goto Error;
1da177e4 LT	467
4be44fcd	468	Done:
d550d98d	469	return error;
1da177e4	470
4be44fcd	471	Error:
1da177e4 LT	472	remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
	473	remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
	474	remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
	475
	476	error = -EFAULT;
	477	goto Done;
	478	}
d4c5f047 ZR	479	#else
	480	static int acpi_system_procfs_init(void)
	481	{
	482	return 0;
	483	}
	484	#endif
	485
	486	static int __init acpi_system_init(void)
	487	{
	488	int result = 0;
	489
	490	if (acpi_disabled)
	491	return 0;
	492
	493	result = acpi_system_procfs_init();
	494	if (result)
	495	return result;
	496
	497	result = acpi_system_sysfs_init();
	498
	499	return result;
	500	}
1da177e4	501
1da177e4	502	subsys_initcall(acpi_system_init);