[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / pci / hotplug / acpiphp_core.c

/*
 * ACPI PCI Hot Plug Controller Driver
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
 * Copyright (C) 2002,2003 NEC Corporation
 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
 * Copyright (C) 2003-2005 Hewlett Packard
 *
 * All rights reserved.
 *
 * 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, GOOD TITLE or
 * NON INFRINGEMENT.  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.
 *
 * Send feedback to <kristen.c.accardi@intel.com>
 *
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include "pci_hotplug.h"
#include "acpiphp.h"

#define MY_NAME	"acpiphp"

static int debug;
int acpiphp_debug;

/* local variables */
static int num_slots;
static struct acpiphp_attention_info *attention_info;

#define DRIVER_VERSION	"0.5"
#define DRIVER_AUTHOR	"Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@hp.com>"
#define DRIVER_DESC	"ACPI Hot Plug PCI Controller Driver"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
module_param(debug, bool, 0644);

/* export the attention callback registration methods */
EXPORT_SYMBOL_GPL(acpiphp_register_attention);
EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);

static int enable_slot		(struct hotplug_slot *slot);
static int disable_slot		(struct hotplug_slot *slot);
static int set_attention_status (struct hotplug_slot *slot, u8 value);
static int get_power_status	(struct hotplug_slot *slot, u8 *value);
static int get_attention_status (struct hotplug_slot *slot, u8 *value);
static int get_address		(struct hotplug_slot *slot, u32 *value);
static int get_latch_status	(struct hotplug_slot *slot, u8 *value);
static int get_adapter_status	(struct hotplug_slot *slot, u8 *value);

static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
	.owner			= THIS_MODULE,
	.enable_slot		= enable_slot,
	.disable_slot		= disable_slot,
	.set_attention_status	= set_attention_status,
	.get_power_status	= get_power_status,
	.get_attention_status	= get_attention_status,
	.get_latch_status	= get_latch_status,
	.get_adapter_status	= get_adapter_status,
	.get_address		= get_address,
};


/**
 * acpiphp_register_attention - set attention LED callback
 * @info: must be completely filled with LED callbacks
 *
 * Description: this is used to register a hardware specific ACPI
 * driver that manipulates the attention LED.  All the fields in
 * info must be set.
 **/
int acpiphp_register_attention(struct acpiphp_attention_info *info)
{
	int retval = -EINVAL;

	if (info && info->owner && info->set_attn &&
			info->get_attn && !attention_info) {
		retval = 0;
		attention_info = info;
	}
	return retval;
}


/**
 * acpiphp_unregister_attention - unset attention LED callback
 * @info: must match the pointer used to register
 *
 * Description: this is used to un-register a hardware specific acpi
 * driver that manipulates the attention LED.  The pointer to the 
 * info struct must be the same as the one used to set it.
 **/
int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
{
	int retval = -EINVAL;

	if (info && attention_info == info) {
		attention_info = NULL;
		retval = 0;
	}
	return retval;
}


/**
 * enable_slot - power on and enable a slot
 * @hotplug_slot: slot to enable
 *
 * Actual tasks are done in acpiphp_enable_slot()
 *
 */
static int enable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	/* enable the specified slot */
	return acpiphp_enable_slot(slot->acpi_slot);
}


/**
 * disable_slot - disable and power off a slot
 * @hotplug_slot: slot to disable
 *
 * Actual tasks are done in acpiphp_disable_slot()
 *
 */
static int disable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	/* disable the specified slot */
	return acpiphp_disable_slot(slot->acpi_slot);
}


 /**
  * set_attention_status - set attention LED
 * @hotplug_slot: slot to set attention LED on
 * @status: value to set attention LED to (0 or 1)
 *
 * attention status LED, so we use a callback that
 * was registered with us.  This allows hardware specific
 * ACPI implementations to blink the light for us.
 **/
 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
 {
	int retval = -ENODEV;

 	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 
	if (attention_info && try_module_get(attention_info->owner)) {
		retval = attention_info->set_attn(hotplug_slot, status);
		module_put(attention_info->owner);
	} else
		attention_info = NULL;
	return retval;
 }
 

/**
 * get_power_status - get power status of a slot
 * @hotplug_slot: slot to get status
 * @value: pointer to store status
 *
 * Some platforms may not implement _STA method properly.
 * In that case, the value returned may not be reliable.
 *
 */
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	*value = acpiphp_get_power_status(slot->acpi_slot);

	return 0;
}


 /**
 * get_attention_status - get attention LED status
 * @hotplug_slot: slot to get status from
 * @value: returns with value of attention LED
 *
 * ACPI doesn't have known method to determine the state
 * of the attention status LED, so we use a callback that
 * was registered with us.  This allows hardware specific
 * ACPI implementations to determine its state
 **/
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	int retval = -EINVAL;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	if (attention_info && try_module_get(attention_info->owner)) {
		retval = attention_info->get_attn(hotplug_slot, value);
		module_put(attention_info->owner);
	} else
		attention_info = NULL;
	return retval;
}


/**
 * get_latch_status - get latch status of a slot
 * @hotplug_slot: slot to get status
 * @value: pointer to store status
 *
 * ACPI doesn't provide any formal means to access latch status.
 * Instead, we fake latch status from _STA
 *
 */
static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	*value = acpiphp_get_latch_status(slot->acpi_slot);

	return 0;
}


/**
 * get_adapter_status - get adapter status of a slot
 * @hotplug_slot: slot to get status
 * @value: pointer to store status
 *
 * ACPI doesn't provide any formal means to access adapter status.
 * Instead, we fake adapter status from _STA
 *
 */
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	*value = acpiphp_get_adapter_status(slot->acpi_slot);

	return 0;
}


/**
 * get_address - get pci address of a slot
 * @hotplug_slot: slot to get status
 * @value: pointer to struct pci_busdev (seg, bus, dev)
 */
static int get_address(struct hotplug_slot *hotplug_slot, u32 *value)
{
	struct slot *slot = hotplug_slot->private;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	*value = acpiphp_get_address(slot->acpi_slot);

	return 0;
}

static int __init init_acpi(void)
{
	int retval;

	/* initialize internal data structure etc. */
	retval = acpiphp_glue_init();

	/* read initial number of slots */
	if (!retval) {
		num_slots = acpiphp_get_num_slots();
		if (num_slots == 0)
			retval = -ENODEV;
	}

	return retval;
}


/**
 * make_slot_name - make a slot name that appears in pcihpfs
 * @slot: slot to name
 *
 */
static void make_slot_name(struct slot *slot)
{
	snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%u",
		 slot->acpi_slot->sun);
}

/**
 * release_slot - free up the memory used by a slot
 * @hotplug_slot: slot to free
 */
static void release_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	kfree(slot->hotplug_slot->info);
	kfree(slot->hotplug_slot->name);
	kfree(slot->hotplug_slot);
	kfree(slot);
}

/* callback routine to initialize 'struct slot' for each slot */
int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
{
	struct slot *slot;
	struct hotplug_slot *hotplug_slot;
	struct hotplug_slot_info *hotplug_slot_info;
	int retval = -ENOMEM;

	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
	if (!slot)
		goto error;

	slot->hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
	if (!slot->hotplug_slot)
		goto error_slot;

	slot->hotplug_slot->info = kzalloc(sizeof(*hotplug_slot_info),
					   GFP_KERNEL);
	if (!slot->hotplug_slot->info)
		goto error_hpslot;

	slot->hotplug_slot->name = kzalloc(SLOT_NAME_SIZE, GFP_KERNEL);
	if (!slot->hotplug_slot->name)
		goto error_info;

	slot->hotplug_slot->private = slot;
	slot->hotplug_slot->release = &release_slot;
	slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;

	slot->acpi_slot = acpiphp_slot;
	slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
	slot->hotplug_slot->info->attention_status = 0;
	slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
	slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
	slot->hotplug_slot->info->max_bus_speed = PCI_SPEED_UNKNOWN;
	slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;

	acpiphp_slot->slot = slot;
	make_slot_name(slot);

	retval = pci_hp_register(slot->hotplug_slot);
	if (retval) {
		err("pci_hp_register failed with error %d\n", retval);
		goto error_name;
 	}

	info("Slot [%s] registered\n", slot->hotplug_slot->name);

	return 0;
error_name:
	kfree(slot->hotplug_slot->name);
error_info:
	kfree(slot->hotplug_slot->info);
error_hpslot:
	kfree(slot->hotplug_slot);
error_slot:
	kfree(slot);
error:
	return retval;
}


void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
{
	struct slot *slot = acpiphp_slot->slot;
	int retval = 0;

	info ("Slot [%s] unregistered\n", slot->hotplug_slot->name);

	retval = pci_hp_deregister(slot->hotplug_slot);
	if (retval)
		err("pci_hp_deregister failed with error %d\n", retval);
}


static int __init acpiphp_init(void)
{
	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");

	acpiphp_debug = debug;

	/* read all the ACPI info from the system */
	return init_acpi();
}


static void __exit acpiphp_exit(void)
{
	/* deallocate internal data structures etc. */
	acpiphp_glue_exit();
}

module_init(acpiphp_init);
module_exit(acpiphp_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ACPI PCI Hot Plug Controller Driver
	3	*
	4	* Copyright (C) 1995,2001 Compaq Computer Corporation
	5	* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
	6	* Copyright (C) 2001 IBM Corp.
	7	* Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
	8	* Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
	9	* Copyright (C) 2002,2003 NEC Corporation
42f49a6a RS	10	* Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
42f49a6a RS	11	* Copyright (C) 2003-2005 Hewlett Packard
1da177e4 LT	12	*
	13	* All rights reserved.
	14	*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License as published by
	17	* the Free Software Foundation; either version 2 of the License, or (at
	18	* your option) any later version.
	19	*
	20	* This program is distributed in the hope that it will be useful, but
	21	* WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	23	* NON INFRINGEMENT. See the GNU General Public License for more
	24	* details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	29	*
998be20f	30	* Send feedback to <kristen.c.accardi@intel.com>
1da177e4 LT	31	*
	32	*/
	33
	34	#include <linux/init.h>
	35	#include <linux/module.h>
	36	#include <linux/moduleparam.h>
	37
	38	#include <linux/kernel.h>
	39	#include <linux/pci.h>
	40	#include <linux/slab.h>
	41	#include <linux/smp.h>
	42	#include <linux/smp_lock.h>
	43	#include "pci_hotplug.h"
	44	#include "acpiphp.h"
	45
1da177e4 LT	46	#define MY_NAME "acpiphp"
	47
	48	static int debug;
	49	int acpiphp_debug;
	50
	51	/* local variables */
	52	static int num_slots;
	53	static struct acpiphp_attention_info *attention_info;
	54
42f49a6a RS	55	#define DRIVER_VERSION "0.5"
42f49a6a RS	56	#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@hp.com>"
1da177e4 LT	57	#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
	58
	59	MODULE_AUTHOR(DRIVER_AUTHOR);
	60	MODULE_DESCRIPTION(DRIVER_DESC);
	61	MODULE_LICENSE("GPL");
	62	MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
	63	module_param(debug, bool, 0644);
	64
	65	/* export the attention callback registration methods */
	66	EXPORT_SYMBOL_GPL(acpiphp_register_attention);
	67	EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);
	68
	69	static int enable_slot (struct hotplug_slot *slot);
	70	static int disable_slot (struct hotplug_slot *slot);
	71	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	72	static int get_power_status (struct hotplug_slot slot, u8 value);
	73	static int get_attention_status (struct hotplug_slot slot, u8 value);
	74	static int get_address (struct hotplug_slot slot, u32 value);
	75	static int get_latch_status (struct hotplug_slot slot, u8 value);
	76	static int get_adapter_status (struct hotplug_slot slot, u8 value);
	77
	78	static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
	79	.owner = THIS_MODULE,
	80	.enable_slot = enable_slot,
	81	.disable_slot = disable_slot,
	82	.set_attention_status = set_attention_status,
	83	.get_power_status = get_power_status,
	84	.get_attention_status = get_attention_status,
	85	.get_latch_status = get_latch_status,
	86	.get_adapter_status = get_adapter_status,
	87	.get_address = get_address,
	88	};
	89
	90
	91	/**
	92	* acpiphp_register_attention - set attention LED callback
	93	* @info: must be completely filled with LED callbacks
	94	*
	95	* Description: this is used to register a hardware specific ACPI
	96	* driver that manipulates the attention LED. All the fields in
	97	* info must be set.
	98	**/
	99	int acpiphp_register_attention(struct acpiphp_attention_info *info)
	100	{
	101	int retval = -EINVAL;
	102
	103	if (info && info->owner && info->set_attn &&
	104	info->get_attn && !attention_info) {
	105	retval = 0;
	106	attention_info = info;
	107	}
	108	return retval;
	109	}
	110
	111
	112	/**
	113	* acpiphp_unregister_attention - unset attention LED callback
	114	* @info: must match the pointer used to register
	115	*
	116	* Description: this is used to un-register a hardware specific acpi
	117	* driver that manipulates the attention LED. The pointer to the
	118	* info struct must be the same as the one used to set it.
	119	**/
	120	int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
121	{
122	int retval = -EINVAL;
123
124	if (info && attention_info == info) {
125	attention_info = NULL;
126	retval = 0;
127	}
128	return retval;
129	}
130
131
132	/**
133	* enable_slot - power on and enable a slot
134	* @hotplug_slot: slot to enable
135	*
136	* Actual tasks are done in acpiphp_enable_slot()
137	*
138	*/
139	static int enable_slot(struct hotplug_slot *hotplug_slot)
140	{
141	struct slot *slot = hotplug_slot->private;
142
143	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
144
145	/* enable the specified slot */
146	return acpiphp_enable_slot(slot->acpi_slot);
147	}
148
149
150	/**
151	* disable_slot - disable and power off a slot
152	* @hotplug_slot: slot to disable
153	*
154	* Actual tasks are done in acpiphp_disable_slot()
155	*
156	*/
157	static int disable_slot(struct hotplug_slot *hotplug_slot)
158	{
159	struct slot *slot = hotplug_slot->private;
160
161	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
162
163	/* disable the specified slot */
164	return acpiphp_disable_slot(slot->acpi_slot);
165	}
166
167
168	/**
169	* set_attention_status - set attention LED
170	* @hotplug_slot: slot to set attention LED on
171	* @status: value to set attention LED to (0 or 1)
172	*
173	* attention status LED, so we use a callback that
174	* was registered with us. This allows hardware specific
175	* ACPI implementations to blink the light for us.
176	**/
177	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
178	{
179	int retval = -ENODEV;
180
181	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
182
183	if (attention_info && try_module_get(attention_info->owner)) {
184	retval = attention_info->set_attn(hotplug_slot, status);
185	module_put(attention_info->owner);
186	} else
187	attention_info = NULL;
188	return retval;
189	}
190
191
192	/**
193	* get_power_status - get power status of a slot
194	* @hotplug_slot: slot to get status
195	* @value: pointer to store status
196	*
197	* Some platforms may not implement _STA method properly.
198	* In that case, the value returned may not be reliable.
199	*
200	*/
201	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
202	{
203	struct slot *slot = hotplug_slot->private;
204
205	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
206
207	*value = acpiphp_get_power_status(slot->acpi_slot);
208
209	return 0;
210	}
211
212
213	/**
214	* get_attention_status - get attention LED status
215	* @hotplug_slot: slot to get status from
216	* @value: returns with value of attention LED
217	*
218	* ACPI doesn't have known method to determine the state
219	* of the attention status LED, so we use a callback that
220	* was registered with us. This allows hardware specific
221	* ACPI implementations to determine its state
222	**/
223	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
224	{
225	int retval = -EINVAL;
226
227	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
228
229	if (attention_info && try_module_get(attention_info->owner)) {
230	retval = attention_info->get_attn(hotplug_slot, value);
231	module_put(attention_info->owner);
232	} else
233	attention_info = NULL;
234	return retval;
235	}
236
237
238	/**
239	* get_latch_status - get latch status of a slot
240	* @hotplug_slot: slot to get status
241	* @value: pointer to store status
242	*
243	* ACPI doesn't provide any formal means to access latch status.
244	* Instead, we fake latch status from _STA
245	*
246	*/
247	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
248	{
249	struct slot *slot = hotplug_slot->private;
250
251	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
252
253	*value = acpiphp_get_latch_status(slot->acpi_slot);
254
255	return 0;
256	}
257
258
259	/**
260	* get_adapter_status - get adapter status of a slot
261	* @hotplug_slot: slot to get status
262	* @value: pointer to store status
263	*
264	* ACPI doesn't provide any formal means to access adapter status.
265	* Instead, we fake adapter status from _STA
266	*
267	*/
268	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
269	{
270	struct slot *slot = hotplug_slot->private;
271
272	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
273
274	*value = acpiphp_get_adapter_status(slot->acpi_slot);
275
276	return 0;
277	}
278
279
280	/**
281	* get_address - get pci address of a slot
282	* @hotplug_slot: slot to get status
42f49a6a	283	* @value: pointer to struct pci_busdev (seg, bus, dev)
1da177e4 LT	284	*/
	285	static int get_address(struct hotplug_slot hotplug_slot, u32 value)
	286	{
	287	struct slot *slot = hotplug_slot->private;
	288
	289	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	290
	291	*value = acpiphp_get_address(slot->acpi_slot);
	292
	293	return 0;
	294	}
	295
	296	static int __init init_acpi(void)
	297	{
	298	int retval;
	299
	300	/* initialize internal data structure etc. */
	301	retval = acpiphp_glue_init();
	302
	303	/* read initial number of slots */
	304	if (!retval) {
	305	num_slots = acpiphp_get_num_slots();
	306	if (num_slots == 0)
	307	retval = -ENODEV;
	308	}
	309
	310	return retval;
	311	}
	312
	313
	314	/**
	315	* make_slot_name - make a slot name that appears in pcihpfs
	316	* @slot: slot to name
	317	*
	318	*/
	319	static void make_slot_name(struct slot *slot)
	320	{
	321	snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%u",
	322	slot->acpi_slot->sun);
	323	}
	324
	325	/**
	326	* release_slot - free up the memory used by a slot
	327	* @hotplug_slot: slot to free
	328	*/
	329	static void release_slot(struct hotplug_slot *hotplug_slot)
	330	{
	331	struct slot *slot = hotplug_slot->private;
	332
	333	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	334
	335	kfree(slot->hotplug_slot->info);
	336	kfree(slot->hotplug_slot->name);
	337	kfree(slot->hotplug_slot);
	338	kfree(slot);
	339	}
	340
e27da381 MT	341	/* callback routine to initialize 'struct slot' for each slot */
e27da381 MT	342	int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
1da177e4 LT	343	{
1da177e4 LT	344	struct slot *slot;
e27da381 MT	345	struct hotplug_slot *hotplug_slot;
e27da381 MT	346	struct hotplug_slot_info *hotplug_slot_info;
1da177e4	347	int retval = -ENOMEM;
e27da381 MT	348
	349	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
	350	if (!slot)
	351	goto error;
	352
	353	slot->hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
	354	if (!slot->hotplug_slot)
	355	goto error_slot;
	356
	357	slot->hotplug_slot->info = kzalloc(sizeof(*hotplug_slot_info),
	358	GFP_KERNEL);
	359	if (!slot->hotplug_slot->info)
	360	goto error_hpslot;
	361
	362	slot->hotplug_slot->name = kzalloc(SLOT_NAME_SIZE, GFP_KERNEL);
	363	if (!slot->hotplug_slot->name)
	364	goto error_info;
	365
	366	slot->hotplug_slot->private = slot;
	367	slot->hotplug_slot->release = &release_slot;
	368	slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
	369
	370	slot->acpi_slot = acpiphp_slot;
	371	slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
	372	slot->hotplug_slot->info->attention_status = 0;
	373	slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
	374	slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
	375	slot->hotplug_slot->info->max_bus_speed = PCI_SPEED_UNKNOWN;
	376	slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
	377
	378	acpiphp_slot->slot = slot;
	379	make_slot_name(slot);
	380
	381	retval = pci_hp_register(slot->hotplug_slot);
	382	if (retval) {
	383	err("pci_hp_register failed with error %d\n", retval);
	384	goto error_name;
	385	}
	386
	387	info("Slot [%s] registered\n", slot->hotplug_slot->name);
1da177e4 LT	388
	389	return 0;
	390	error_name:
	391	kfree(slot->hotplug_slot->name);
	392	error_info:
	393	kfree(slot->hotplug_slot->info);
	394	error_hpslot:
	395	kfree(slot->hotplug_slot);
	396	error_slot:
	397	kfree(slot);
	398	error:
	399	return retval;
	400	}
	401
	402
e27da381	403	void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
1da177e4	404	{
e27da381 MT	405	struct slot *slot = acpiphp_slot->slot;
e27da381 MT	406	int retval = 0;
1da177e4	407
e27da381 MT	408	info ("Slot [%s] unregistered\n", slot->hotplug_slot->name);
	409
	410	retval = pci_hp_deregister(slot->hotplug_slot);
	411	if (retval)
	412	err("pci_hp_deregister failed with error %d\n", retval);
1da177e4 LT	413	}
	414
	415
	416	static int __init acpiphp_init(void)
	417	{
1da177e4 LT	418	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	419
	420	acpiphp_debug = debug;
	421
	422	/* read all the ACPI info from the system */
4e8662bb	423	return init_acpi();
1da177e4 LT	424	}
	425
	426
	427	static void __exit acpiphp_exit(void)
	428	{
1da177e4 LT	429	/* deallocate internal data structures etc. */
	430	acpiphp_glue_exit();
	431	}
	432
	433	module_init(acpiphp_init);
	434	module_exit(acpiphp_exit);