[mirror_ubuntu-bionic-kernel.git] / drivers / pci / hotplug / pciehp_core.c

/*
 * PCI Express 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) 2003-2004 Intel Corporation
 *
 * 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 <greg@kroah.com>, <kristen.c.accardi@intel.com>
 *
 * Authors:
 *   Dan Zink <dan.zink@compaq.com>
 *   Greg Kroah-Hartman <greg@kroah.com>
 *   Dely Sy <dely.l.sy@intel.com>"
 */

#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "pciehp.h"
#include <linux/interrupt.h>
#include <linux/time.h>

/* Global variables */
bool pciehp_debug;
bool pciehp_poll_mode;
int pciehp_poll_time;
static bool pciehp_force;

/*
 * not really modular, but the easiest way to keep compat with existing
 * bootargs behaviour is to continue using module_param here.
 */
module_param(pciehp_debug, bool, 0644);
module_param(pciehp_poll_mode, bool, 0644);
module_param(pciehp_poll_time, int, 0644);
module_param(pciehp_force, bool, 0644);
MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");

#define PCIE_MODULE_NAME "pciehp"

static int set_attention_status(struct hotplug_slot *slot, u8 value);
static int enable_slot(struct hotplug_slot *slot);
static int disable_slot(struct hotplug_slot *slot);
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_latch_status(struct hotplug_slot *slot, u8 *value);
static int get_adapter_status(struct hotplug_slot *slot, u8 *value);
static int reset_slot(struct hotplug_slot *slot, int probe);

/**
 * 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;

	/* queued work needs hotplug_slot name */
	cancel_delayed_work(&slot->work);
	drain_workqueue(slot->wq);

	kfree(hotplug_slot->ops);
	kfree(hotplug_slot->info);
	kfree(hotplug_slot);
}

static int init_slot(struct controller *ctrl)
{
	struct slot *slot = ctrl->slot;
	struct hotplug_slot *hotplug = NULL;
	struct hotplug_slot_info *info = NULL;
	struct hotplug_slot_ops *ops = NULL;
	char name[SLOT_NAME_SIZE];
	int retval = -ENOMEM;

	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	if (!hotplug)
		goto out;

	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		goto out;

	/* Setup hotplug slot ops */
	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
	if (!ops)
		goto out;

	ops->enable_slot = enable_slot;
	ops->disable_slot = disable_slot;
	ops->get_power_status = get_power_status;
	ops->get_adapter_status = get_adapter_status;
	ops->reset_slot = reset_slot;
	if (MRL_SENS(ctrl))
		ops->get_latch_status = get_latch_status;
	if (ATTN_LED(ctrl)) {
		ops->get_attention_status = get_attention_status;
		ops->set_attention_status = set_attention_status;
	} else if (ctrl->pcie->port->hotplug_user_indicators) {
		ops->get_attention_status = pciehp_get_raw_indicator_status;
		ops->set_attention_status = pciehp_set_raw_indicator_status;
	}

	/* register this slot with the hotplug pci core */
	hotplug->info = info;
	hotplug->private = slot;
	hotplug->release = &release_slot;
	hotplug->ops = ops;
	slot->hotplug_slot = hotplug;
	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));

	retval = pci_hp_register(hotplug,
				 ctrl->pcie->port->subordinate, 0, name);
	if (retval)
		ctrl_err(ctrl, "pci_hp_register failed: error %d\n", retval);
out:
	if (retval) {
		kfree(ops);
		kfree(info);
		kfree(hotplug);
	}
	return retval;
}

static void cleanup_slot(struct controller *ctrl)
{
	pci_hp_deregister(ctrl->slot->hotplug_slot);
}

/*
 * set_attention_status - Turns the Amber LED for a slot on, off or blink
 */
static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
{
	struct slot *slot = hotplug_slot->private;

	pciehp_set_attention_status(slot, status);
	return 0;
}


static int enable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	return pciehp_sysfs_enable_slot(slot);
}


static int disable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	return pciehp_sysfs_disable_slot(slot);
}

static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;

	pciehp_get_power_status(slot, value);
	return 0;
}

static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;

	pciehp_get_attention_status(slot, value);
	return 0;
}

static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;

	pciehp_get_latch_status(slot, value);
	return 0;
}

static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = hotplug_slot->private;

	pciehp_get_adapter_status(slot, value);
	return 0;
}

static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
{
	struct slot *slot = hotplug_slot->private;

	return pciehp_reset_slot(slot, probe);
}

static int pciehp_probe(struct pcie_device *dev)
{
	int rc;
	struct controller *ctrl;
	struct slot *slot;
	u8 occupied, poweron;

	/* If this is not a "hotplug" service, we have no business here. */
	if (dev->service != PCIE_PORT_SERVICE_HP)
		return -ENODEV;

	if (!dev->port->subordinate) {
		/* Can happen if we run out of bus numbers during probe */
		dev_err(&dev->device,
			"Hotplug bridge without secondary bus, ignoring\n");
		return -ENODEV;
	}

	ctrl = pcie_init(dev);
	if (!ctrl) {
		dev_err(&dev->device, "Controller initialization failed\n");
		return -ENODEV;
	}
	set_service_data(dev, ctrl);

	/* Setup the slot information structures */
	rc = init_slot(ctrl);
	if (rc) {
		if (rc == -EBUSY)
			ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
		else
			ctrl_err(ctrl, "Slot initialization failed (%d)\n", rc);
		goto err_out_release_ctlr;
	}

	/* Enable events after we have setup the data structures */
	rc = pcie_init_notification(ctrl);
	if (rc) {
		ctrl_err(ctrl, "Notification initialization failed (%d)\n", rc);
		goto err_out_free_ctrl_slot;
	}

	/* Check if slot is occupied */
	slot = ctrl->slot;
	pciehp_get_adapter_status(slot, &occupied);
	pciehp_get_power_status(slot, &poweron);
	if (occupied && pciehp_force) {
		mutex_lock(&slot->hotplug_lock);
		pciehp_enable_slot(slot);
		mutex_unlock(&slot->hotplug_lock);
	}
	/* If empty slot's power status is on, turn power off */
	if (!occupied && poweron && POWER_CTRL(ctrl))
		pciehp_power_off_slot(slot);

	return 0;

err_out_free_ctrl_slot:
	cleanup_slot(ctrl);
err_out_release_ctlr:
	pciehp_release_ctrl(ctrl);
	return -ENODEV;
}

static void pciehp_remove(struct pcie_device *dev)
{
	struct controller *ctrl = get_service_data(dev);

	pcie_shutdown_notification(ctrl);
	cleanup_slot(ctrl);
	pciehp_release_ctrl(ctrl);
}

#ifdef CONFIG_PM
static int pciehp_suspend(struct pcie_device *dev)
{
	return 0;
}

static int pciehp_resume(struct pcie_device *dev)
{
	struct controller *ctrl;
	struct slot *slot;
	u8 status;

	ctrl = get_service_data(dev);

	/* reinitialize the chipset's event detection logic */
	pcie_reenable_notification(ctrl);

	slot = ctrl->slot;

	/* Check if slot is occupied */
	pciehp_get_adapter_status(slot, &status);
	mutex_lock(&slot->hotplug_lock);
	if (status)
		pciehp_enable_slot(slot);
	else
		pciehp_disable_slot(slot);
	mutex_unlock(&slot->hotplug_lock);
	return 0;
}
#endif /* PM */

static struct pcie_port_service_driver hpdriver_portdrv = {
	.name		= PCIE_MODULE_NAME,
	.port_type	= PCIE_ANY_PORT,
	.service	= PCIE_PORT_SERVICE_HP,

	.probe		= pciehp_probe,
	.remove		= pciehp_remove,

#ifdef	CONFIG_PM
	.suspend	= pciehp_suspend,
	.resume		= pciehp_resume,
#endif	/* PM */
};

static int __init pcied_init(void)
{
	int retval = 0;

	retval = pcie_port_service_register(&hpdriver_portdrv);
	dbg("pcie_port_service_register = %d\n", retval);
	if (retval)
		dbg("Failure to register service\n");

	return retval;
}
device_initcall(pcied_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* PCI Express 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) 2003-2004 Intel Corporation
	8	*
	9	* All rights reserved.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or (at
	14	* your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful, but
	17	* WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	19	* NON INFRINGEMENT. See the GNU General Public License for more
	20	* details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	25	*
8cf4c195	26	* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
1da177e4	27	*
5fbeef63 BH	28	* Authors:
	29	* Dan Zink <dan.zink@compaq.com>
	30	* Greg Kroah-Hartman <greg@kroah.com>
	31	* Dely Sy <dely.l.sy@intel.com>"
1da177e4 LT	32	*/
1da177e4 LT	33
1da177e4 LT	34	#include <linux/moduleparam.h>
1da177e4 LT	35	#include <linux/kernel.h>
5a0e3ad6	36	#include <linux/slab.h>
1da177e4	37	#include <linux/types.h>
1da177e4	38	#include <linux/pci.h>
1da177e4	39	#include "pciehp.h"
1da177e4	40	#include <linux/interrupt.h>
34d03419	41	#include <linux/time.h>
1da177e4 LT	42
1da177e4 LT	43	/* Global variables */
90ab5ee9 RR	44	bool pciehp_debug;
90ab5ee9 RR	45	bool pciehp_poll_mode;
1da177e4	46	int pciehp_poll_time;
0b950f0f	47	static bool pciehp_force;
1da177e4	48
70626d88 PG	49	/*
	50	* not really modular, but the easiest way to keep compat with existing
	51	* bootargs behaviour is to continue using module_param here.
	52	*/
1da177e4 LT	53	module_param(pciehp_debug, bool, 0644);
	54	module_param(pciehp_poll_mode, bool, 0644);
	55	module_param(pciehp_poll_time, int, 0644);
a3a45ec8	56	module_param(pciehp_force, bool, 0644);
1da177e4 LT	57	MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
	58	MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
	59	MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
28eb5f27	60	MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
1da177e4 LT	61
	62	#define PCIE_MODULE_NAME "pciehp"
	63
ff3ce480 BS	64	static int set_attention_status(struct hotplug_slot *slot, u8 value);
	65	static int enable_slot(struct hotplug_slot *slot);
	66	static int disable_slot(struct hotplug_slot *slot);
	67	static int get_power_status(struct hotplug_slot slot, u8 value);
	68	static int get_attention_status(struct hotplug_slot slot, u8 value);
	69	static int get_latch_status(struct hotplug_slot slot, u8 value);
	70	static int get_adapter_status(struct hotplug_slot slot, u8 value);
	71	static int reset_slot(struct hotplug_slot *slot, int probe);
1da177e4	72
b308240b DS	73	/**
	74	* release_slot - free up the memory used by a slot
	75	* @hotplug_slot: slot to free
	76	*/
	77	static void release_slot(struct hotplug_slot *hotplug_slot)
	78	{
270a1039 LW	79	struct slot *slot = hotplug_slot->private;
	80
	81	/* queued work needs hotplug_slot name */
	82	cancel_delayed_work(&slot->work);
	83	drain_workqueue(slot->wq);
	84
586f1d66	85	kfree(hotplug_slot->ops);
c4635eb0 KK	86	kfree(hotplug_slot->info);
c4635eb0 KK	87	kfree(hotplug_slot);
a0b17257 KK	88	}
a0b17257 KK	89
8720d27d	90	static int init_slot(struct controller *ctrl)
1da177e4	91	{
8720d27d KK	92	struct slot *slot = ctrl->slot;
	93	struct hotplug_slot *hotplug = NULL;
	94	struct hotplug_slot_info *info = NULL;
586f1d66	95	struct hotplug_slot_ops *ops = NULL;
e1acb24f	96	char name[SLOT_NAME_SIZE];
a0b17257	97	int retval = -ENOMEM;
1da177e4	98
8720d27d KK	99	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	100	if (!hotplug)
	101	goto out;
	102
	103	info = kzalloc(sizeof(*info), GFP_KERNEL);
	104	if (!info)
	105	goto out;
	106
586f1d66 KK	107	/* Setup hotplug slot ops */
	108	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
	109	if (!ops)
	110	goto out;
9cad7f58	111
586f1d66 KK	112	ops->enable_slot = enable_slot;
	113	ops->disable_slot = disable_slot;
	114	ops->get_power_status = get_power_status;
	115	ops->get_adapter_status = get_adapter_status;
2e35afae	116	ops->reset_slot = reset_slot;
586f1d66 KK	117	if (MRL_SENS(ctrl))
	118	ops->get_latch_status = get_latch_status;
	119	if (ATTN_LED(ctrl)) {
	120	ops->get_attention_status = get_attention_status;
	121	ops->set_attention_status = set_attention_status;
576243b3 KB	122	} else if (ctrl->pcie->port->hotplug_user_indicators) {
	123	ops->get_attention_status = pciehp_get_raw_indicator_status;
	124	ops->set_attention_status = pciehp_set_raw_indicator_status;
586f1d66 KK	125	}
586f1d66 KK	126
8720d27d KK	127	/* register this slot with the hotplug pci core */
	128	hotplug->info = info;
	129	hotplug->private = slot;
	130	hotplug->release = &release_slot;
586f1d66	131	hotplug->ops = ops;
8720d27d	132	slot->hotplug_slot = hotplug;
07a09694	133	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	134
8720d27d	135	retval = pci_hp_register(hotplug,
385e2491	136	ctrl->pcie->port->subordinate, 0, name);
445f7985	137	if (retval)
3784e0c6	138	ctrl_err(ctrl, "pci_hp_register failed: error %d\n", retval);
8720d27d KK	139	out:
8720d27d KK	140	if (retval) {
586f1d66	141	kfree(ops);
8720d27d KK	142	kfree(info);
8720d27d KK	143	kfree(hotplug);
1da177e4	144	}
a0b17257	145	return retval;
1da177e4 LT	146	}
1da177e4 LT	147
8720d27d	148	static void cleanup_slot(struct controller *ctrl)
1da177e4	149	{
8720d27d	150	pci_hp_deregister(ctrl->slot->hotplug_slot);
1da177e4 LT	151	}
1da177e4 LT	152
1da177e4 LT	153	/*
	154	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	155	*/
	156	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	157	{
	158	struct slot *slot = hotplug_slot->private;
	159
6dae6202 BH	160	pciehp_set_attention_status(slot, status);
6dae6202 BH	161	return 0;
1da177e4 LT	162	}
	163
	164
	165	static int enable_slot(struct hotplug_slot *hotplug_slot)
	166	{
	167	struct slot *slot = hotplug_slot->private;
	168
5d386e1a	169	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	170	}
	171
	172
	173	static int disable_slot(struct hotplug_slot *hotplug_slot)
	174	{
	175	struct slot *slot = hotplug_slot->private;
	176
5d386e1a	177	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	178	}
	179
	180	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	181	{
	182	struct slot *slot = hotplug_slot->private;
1da177e4	183
6dae6202 BH	184	pciehp_get_power_status(slot, value);
6dae6202 BH	185	return 0;
1da177e4 LT	186	}
	187
	188	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	189	{
	190	struct slot *slot = hotplug_slot->private;
1da177e4	191
6dae6202 BH	192	pciehp_get_attention_status(slot, value);
6dae6202 BH	193	return 0;
1da177e4 LT	194	}
	195
	196	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	197	{
	198	struct slot *slot = hotplug_slot->private;
1da177e4	199
6dae6202 BH	200	pciehp_get_latch_status(slot, value);
6dae6202 BH	201	return 0;
1da177e4 LT	202	}
	203
	204	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	205	{
	206	struct slot *slot = hotplug_slot->private;
1da177e4	207
6dae6202 BH	208	pciehp_get_adapter_status(slot, value);
6dae6202 BH	209	return 0;
1da177e4 LT	210	}
1da177e4 LT	211
2e35afae AW	212	static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
	213	{
	214	struct slot *slot = hotplug_slot->private;
	215
2e35afae AW	216	return pciehp_reset_slot(slot, probe);
	217	}
	218
0516c8bc	219	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	220	{
	221	int rc;
	222	struct controller *ctrl;
8720d27d	223	struct slot *slot;
8792e11f	224	u8 occupied, poweron;
125c39f7	225
e705c295 RW	226	/* If this is not a "hotplug" service, we have no business here. */
	227	if (dev->service != PCIE_PORT_SERVICE_HP)
	228	return -ENODEV;
a073a826	229
62e4492c AN	230	if (!dev->port->subordinate) {
	231	/* Can happen if we run out of bus numbers during probe */
	232	dev_err(&dev->device,
	233	"Hotplug bridge without secondary bus, ignoring\n");
2af31f41	234	return -ENODEV;
62e4492c AN	235	}
62e4492c AN	236
c4635eb0	237	ctrl = pcie_init(dev);
1da177e4	238	if (!ctrl) {
18b341b7	239	dev_err(&dev->device, "Controller initialization failed\n");
2af31f41	240	return -ENODEV;
1da177e4	241	}
b9708940	242	set_service_data(dev, ctrl);
1da177e4	243
1da177e4	244	/* Setup the slot information structures */
8720d27d	245	rc = init_slot(ctrl);
1da177e4	246	if (rc) {
f46753c5	247	if (rc == -EBUSY)
227f0647	248	ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
f46753c5	249	else
3784e0c6	250	ctrl_err(ctrl, "Slot initialization failed (%d)\n", rc);
a8c2b635	251	goto err_out_release_ctlr;
1da177e4 LT	252	}
1da177e4 LT	253
dbc7e1e5 EB	254	/* Enable events after we have setup the data structures */
	255	rc = pcie_init_notification(ctrl);
	256	if (rc) {
3784e0c6	257	ctrl_err(ctrl, "Notification initialization failed (%d)\n", rc);
65b947bc	258	goto err_out_free_ctrl_slot;
dbc7e1e5 EB	259	}
dbc7e1e5 EB	260
db9aaf0b	261	/* Check if slot is occupied */
8720d27d	262	slot = ctrl->slot;
8792e11f KK	263	pciehp_get_adapter_status(slot, &occupied);
8792e11f KK	264	pciehp_get_power_status(slot, &poweron);
50b52fde RJ	265	if (occupied && pciehp_force) {
50b52fde RJ	266	mutex_lock(&slot->hotplug_lock);
8792e11f	267	pciehp_enable_slot(slot);
50b52fde RJ	268	mutex_unlock(&slot->hotplug_lock);
50b52fde RJ	269	}
8792e11f KK	270	/* If empty slot's power status is on, turn power off */
	271	if (!occupied && poweron && POWER_CTRL(ctrl))
	272	pciehp_power_off_slot(slot);
1da177e4	273
1da177e4 LT	274	return 0;
	275
	276	err_out_free_ctrl_slot:
8720d27d	277	cleanup_slot(ctrl);
a8c2b635	278	err_out_release_ctlr:
82a9e79e	279	pciehp_release_ctrl(ctrl);
1da177e4 LT	280	return -ENODEV;
	281	}
	282
82a9e79e	283	static void pciehp_remove(struct pcie_device *dev)
1da177e4	284	{
b9708940	285	struct controller *ctrl = get_service_data(dev);
1da177e4	286
270a1039	287	pcie_shutdown_notification(ctrl);
8720d27d	288	cleanup_slot(ctrl);
82a9e79e	289	pciehp_release_ctrl(ctrl);
1da177e4 LT	290	}
	291
	292	#ifdef CONFIG_PM
3c78bc61	293	static int pciehp_suspend(struct pcie_device *dev)
1da177e4	294	{
1da177e4 LT	295	return 0;
	296	}
	297
3c78bc61	298	static int pciehp_resume(struct pcie_device *dev)
1da177e4	299	{
87683e22 ON	300	struct controller *ctrl;
	301	struct slot *slot;
	302	u8 status;
	303
87683e22	304	ctrl = get_service_data(dev);
cd2fe83a	305
87683e22	306	/* reinitialize the chipset's event detection logic */
83d19c06	307	pcie_reenable_notification(ctrl);
cd2fe83a	308
87683e22	309	slot = ctrl->slot;
cd2fe83a	310
87683e22 ON	311	/* Check if slot is occupied */
87683e22 ON	312	pciehp_get_adapter_status(slot, &status);
50b52fde	313	mutex_lock(&slot->hotplug_lock);
87683e22 ON	314	if (status)
	315	pciehp_enable_slot(slot);
	316	else
	317	pciehp_disable_slot(slot);
50b52fde	318	mutex_unlock(&slot->hotplug_lock);
1da177e4 LT	319	return 0;
1da177e4 LT	320	}
3a3c244c	321	#endif /* PM */
1da177e4	322
1da177e4	323	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	324	.name = PCIE_MODULE_NAME,
22106368 RW	325	.port_type = PCIE_ANY_PORT,
22106368 RW	326	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	327
	328	.probe = pciehp_probe,
	329	.remove = pciehp_remove,
	330
	331	#ifdef CONFIG_PM
	332	.suspend = pciehp_suspend,
	333	.resume = pciehp_resume,
	334	#endif /* PM */
	335	};
	336
	337	static int __init pcied_init(void)
	338	{
	339	int retval = 0;
	340
a8a2be94	341	retval = pcie_port_service_register(&hpdriver_portdrv);
f7625980	342	dbg("pcie_port_service_register = %d\n", retval);
c2be6f93	343	if (retval)
18b341b7	344	dbg("Failure to register service\n");
c2be6f93	345
1da177e4 LT	346	return retval;
1da177e4 LT	347	}
70626d88	348	device_initcall(pcied_init);