[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>
 *
 */

#include <linux/module.h>
#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;
bool pciehp_force;

#define DRIVER_VERSION	"0.4"
#define DRIVER_AUTHOR	"Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
#define DRIVER_DESC	"PCI Express Hot Plug Controller Driver"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

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);

/**
 * 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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, hotplug_slot_name(hotplug_slot));

	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;
	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;
	}

	/* 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));

	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
		 pci_domain_nr(ctrl->pcie->port->subordinate),
		 ctrl->pcie->port->subordinate->number, PSN(ctrl));
	retval = pci_hp_register(hotplug,
				 ctrl->pcie->port->subordinate, 0, name);
	if (retval)
		ctrl_err(ctrl,
			 "pci_hp_register failed with 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;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	return pciehp_set_attention_status(slot, status);
}


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

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	return pciehp_sysfs_enable_slot(slot);
}


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

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	return pciehp_sysfs_disable_slot(slot);
}

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

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	return pciehp_get_power_status(slot, value);
}

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

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		  __func__, slot_name(slot));

	return pciehp_get_attention_status(slot, value);
}

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

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	return pciehp_get_latch_status(slot, value);
}

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

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	return pciehp_get_adapter_status(slot, value);
}

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

	if (pciehp_force)
		dev_info(&dev->device,
			 "Bypassing BIOS check for pciehp use on %s\n",
			 pci_name(dev->port));
	else if (pciehp_acpi_slot_detection_check(dev->port))
		goto err_out_none;

	ctrl = pcie_init(dev);
	if (!ctrl) {
		dev_err(&dev->device, "Controller initialization failed\n");
		goto err_out_none;
	}
	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\n");
		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\n");
		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)
		pciehp_enable_slot(slot);
	/* 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);
err_out_none:
	return -ENODEV;
}

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

	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_enable_notification(ctrl);

	slot = ctrl->slot;

	/* Check if slot is occupied */
	pciehp_get_adapter_status(slot, &status);
	if (status)
		pciehp_enable_slot(slot);
	else
		pciehp_disable_slot(slot);
	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;

	pciehp_firmware_init();
	retval = pcie_port_service_register(&hpdriver_portdrv);
 	dbg("pcie_port_service_register = %d\n", retval);
  	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	if (retval)
		dbg("Failure to register service\n");

	return retval;
}

static void __exit pcied_cleanup(void)
{
	dbg("unload_pciehpd()\n");
	pcie_port_service_unregister(&hpdriver_portdrv);
	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}

module_init(pcied_init);
module_exit(pcied_cleanup);
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 LT	27	*
	28	*/
	29
1da177e4 LT	30	#include <linux/module.h>
	31	#include <linux/moduleparam.h>
	32	#include <linux/kernel.h>
5a0e3ad6	33	#include <linux/slab.h>
1da177e4	34	#include <linux/types.h>
1da177e4	35	#include <linux/pci.h>
1da177e4	36	#include "pciehp.h"
1da177e4	37	#include <linux/interrupt.h>
34d03419	38	#include <linux/time.h>
1da177e4 LT	39
1da177e4 LT	40	/* Global variables */
90ab5ee9 RR	41	bool pciehp_debug;
90ab5ee9 RR	42	bool pciehp_poll_mode;
1da177e4	43	int pciehp_poll_time;
90ab5ee9	44	bool pciehp_force;
1da177e4 LT	45
	46	#define DRIVER_VERSION "0.4"
	47	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	48	#define DRIVER_DESC "PCI Express Hot Plug Controller Driver"
	49
	50	MODULE_AUTHOR(DRIVER_AUTHOR);
	51	MODULE_DESCRIPTION(DRIVER_DESC);
	52	MODULE_LICENSE("GPL");
	53
	54	module_param(pciehp_debug, bool, 0644);
	55	module_param(pciehp_poll_mode, bool, 0644);
	56	module_param(pciehp_poll_time, int, 0644);
a3a45ec8	57	module_param(pciehp_force, bool, 0644);
1da177e4 LT	58	MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
	59	MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
	60	MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
28eb5f27	61	MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
1da177e4 LT	62
	63	#define PCIE_MODULE_NAME "pciehp"
	64
1da177e4 LT	65	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	66	static int enable_slot (struct hotplug_slot *slot);
	67	static int disable_slot (struct hotplug_slot *slot);
	68	static int get_power_status (struct hotplug_slot slot, u8 value);
	69	static int get_attention_status (struct hotplug_slot slot, u8 value);
	70	static int get_latch_status (struct hotplug_slot slot, u8 value);
	71	static int get_adapter_status (struct hotplug_slot slot, u8 value);
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	{
7f2feec1 TI	79	struct slot *slot = hotplug_slot->private;
7f2feec1 TI	80
18b341b7	81	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	82	__func__, hotplug_slot_name(hotplug_slot));
b308240b	83
586f1d66	84	kfree(hotplug_slot->ops);
c4635eb0 KK	85	kfree(hotplug_slot->info);
c4635eb0 KK	86	kfree(hotplug_slot);
a0b17257 KK	87	}
a0b17257 KK	88
8720d27d	89	static int init_slot(struct controller *ctrl)
1da177e4	90	{
8720d27d KK	91	struct slot *slot = ctrl->slot;
	92	struct hotplug_slot *hotplug = NULL;
	93	struct hotplug_slot_info *info = NULL;
586f1d66	94	struct hotplug_slot_ops *ops = NULL;
e1acb24f	95	char name[SLOT_NAME_SIZE];
a0b17257	96	int retval = -ENOMEM;
1da177e4	97
8720d27d KK	98	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	99	if (!hotplug)
	100	goto out;
	101
	102	info = kzalloc(sizeof(*info), GFP_KERNEL);
	103	if (!info)
	104	goto out;
	105
586f1d66 KK	106	/* Setup hotplug slot ops */
	107	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
	108	if (!ops)
	109	goto out;
	110	ops->enable_slot = enable_slot;
	111	ops->disable_slot = disable_slot;
	112	ops->get_power_status = get_power_status;
	113	ops->get_adapter_status = get_adapter_status;
586f1d66 KK	114	if (MRL_SENS(ctrl))
	115	ops->get_latch_status = get_latch_status;
	116	if (ATTN_LED(ctrl)) {
	117	ops->get_attention_status = get_attention_status;
	118	ops->set_attention_status = set_attention_status;
	119	}
	120
8720d27d KK	121	/* register this slot with the hotplug pci core */
	122	hotplug->info = info;
	123	hotplug->private = slot;
	124	hotplug->release = &release_slot;
586f1d66	125	hotplug->ops = ops;
8720d27d	126	slot->hotplug_slot = hotplug;
07a09694	127	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	128
a2359a33	129	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
385e2491	130	pci_domain_nr(ctrl->pcie->port->subordinate),
07a09694	131	ctrl->pcie->port->subordinate->number, PSN(ctrl));
8720d27d	132	retval = pci_hp_register(hotplug,
385e2491	133	ctrl->pcie->port->subordinate, 0, name);
445f7985	134	if (retval)
8720d27d KK	135	ctrl_err(ctrl,
8720d27d KK	136	"pci_hp_register failed with error %d\n", retval);
8720d27d KK	137	out:
8720d27d KK	138	if (retval) {
586f1d66	139	kfree(ops);
8720d27d KK	140	kfree(info);
8720d27d KK	141	kfree(hotplug);
1da177e4	142	}
a0b17257	143	return retval;
1da177e4 LT	144	}
1da177e4 LT	145
8720d27d	146	static void cleanup_slot(struct controller *ctrl)
1da177e4	147	{
8720d27d	148	pci_hp_deregister(ctrl->slot->hotplug_slot);
1da177e4 LT	149	}
1da177e4 LT	150
1da177e4 LT	151	/*
	152	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	153	*/
	154	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	155	{
	156	struct slot *slot = hotplug_slot->private;
	157
18b341b7	158	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	159	__func__, slot_name(slot));
1da177e4	160
445f7985	161	return pciehp_set_attention_status(slot, status);
1da177e4 LT	162	}
	163
	164
	165	static int enable_slot(struct hotplug_slot *hotplug_slot)
	166	{
	167	struct slot *slot = hotplug_slot->private;
	168
18b341b7	169	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	170	__func__, slot_name(slot));
1da177e4	171
5d386e1a	172	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	173	}
	174
	175
	176	static int disable_slot(struct hotplug_slot *hotplug_slot)
	177	{
	178	struct slot *slot = hotplug_slot->private;
	179
18b341b7	180	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	181	__func__, slot_name(slot));
1da177e4	182
5d386e1a	183	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	184	}
	185
	186	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	187	{
	188	struct slot *slot = hotplug_slot->private;
1da177e4	189
18b341b7	190	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	191	__func__, slot_name(slot));
1da177e4	192
445f7985	193	return pciehp_get_power_status(slot, value);
1da177e4 LT	194	}
	195
	196	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	197	{
	198	struct slot *slot = hotplug_slot->private;
1da177e4	199
18b341b7	200	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	201	__func__, slot_name(slot));
1da177e4	202
445f7985	203	return pciehp_get_attention_status(slot, value);
1da177e4 LT	204	}
	205
	206	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	207	{
	208	struct slot *slot = hotplug_slot->private;
1da177e4	209
18b341b7	210	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	211	__func__, slot_name(slot));
1da177e4	212
445f7985	213	return pciehp_get_latch_status(slot, value);
1da177e4 LT	214	}
	215
	216	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	217	{
	218	struct slot *slot = hotplug_slot->private;
1da177e4	219
18b341b7	220	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	221	__func__, slot_name(slot));
1da177e4	222
445f7985	223	return pciehp_get_adapter_status(slot, value);
1da177e4 LT	224	}
1da177e4 LT	225
0516c8bc	226	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	227	{
	228	int rc;
	229	struct controller *ctrl;
8720d27d	230	struct slot *slot;
8792e11f	231	u8 occupied, poweron;
125c39f7 KK	232
125c39f7 KK	233	if (pciehp_force)
7f2feec1 TI	234	dev_info(&dev->device,
7f2feec1 TI	235	"Bypassing BIOS check for pciehp use on %s\n",
8792e11f	236	pci_name(dev->port));
28eb5f27	237	else if (pciehp_acpi_slot_detection_check(dev->port))
125c39f7	238	goto err_out_none;
a073a826	239
c4635eb0	240	ctrl = pcie_init(dev);
1da177e4	241	if (!ctrl) {
18b341b7	242	dev_err(&dev->device, "Controller initialization failed\n");
c4635eb0	243	goto err_out_none;
1da177e4	244	}
b9708940	245	set_service_data(dev, ctrl);
1da177e4	246
1da177e4	247	/* Setup the slot information structures */
8720d27d	248	rc = init_slot(ctrl);
1da177e4	249	if (rc) {
f46753c5	250	if (rc == -EBUSY)
18b341b7	251	ctrl_warn(ctrl, "Slot already registered by another "
7f2feec1	252	"hotplug driver\n");
f46753c5	253	else
18b341b7	254	ctrl_err(ctrl, "Slot initialization failed\n");
a8c2b635	255	goto err_out_release_ctlr;
1da177e4 LT	256	}
1da177e4 LT	257
dbc7e1e5 EB	258	/* Enable events after we have setup the data structures */
	259	rc = pcie_init_notification(ctrl);
	260	if (rc) {
	261	ctrl_err(ctrl, "Notification initialization failed\n");
65b947bc	262	goto err_out_free_ctrl_slot;
dbc7e1e5 EB	263	}
dbc7e1e5 EB	264
db9aaf0b	265	/* Check if slot is occupied */
8720d27d	266	slot = ctrl->slot;
8792e11f KK	267	pciehp_get_adapter_status(slot, &occupied);
	268	pciehp_get_power_status(slot, &poweron);
	269	if (occupied && pciehp_force)
	270	pciehp_enable_slot(slot);
	271	/* If empty slot's power status is on, turn power off */
	272	if (!occupied && poweron && POWER_CTRL(ctrl))
	273	pciehp_power_off_slot(slot);
1da177e4	274
1da177e4 LT	275	return 0;
	276
	277	err_out_free_ctrl_slot:
8720d27d	278	cleanup_slot(ctrl);
a8c2b635	279	err_out_release_ctlr:
82a9e79e	280	pciehp_release_ctrl(ctrl);
1da177e4 LT	281	err_out_none:
	282	return -ENODEV;
	283	}
	284
82a9e79e	285	static void pciehp_remove(struct pcie_device *dev)
1da177e4	286	{
b9708940	287	struct controller *ctrl = get_service_data(dev);
1da177e4	288
8720d27d	289	cleanup_slot(ctrl);
82a9e79e	290	pciehp_release_ctrl(ctrl);
1da177e4 LT	291	}
	292
	293	#ifdef CONFIG_PM
3a3c244c	294	static int pciehp_suspend (struct pcie_device *dev)
1da177e4	295	{
1da177e4 LT	296	return 0;
	297	}
	298
	299	static int pciehp_resume (struct pcie_device *dev)
	300	{
87683e22 ON	301	struct controller *ctrl;
	302	struct slot *slot;
	303	u8 status;
	304
87683e22	305	ctrl = get_service_data(dev);
cd2fe83a	306
87683e22 ON	307	/* reinitialize the chipset's event detection logic */
87683e22 ON	308	pcie_enable_notification(ctrl);
cd2fe83a	309
87683e22	310	slot = ctrl->slot;
cd2fe83a	311
87683e22 ON	312	/* Check if slot is occupied */
	313	pciehp_get_adapter_status(slot, &status);
	314	if (status)
	315	pciehp_enable_slot(slot);
	316	else
	317	pciehp_disable_slot(slot);
1da177e4 LT	318	return 0;
1da177e4 LT	319	}
3a3c244c	320	#endif /* PM */
1da177e4	321
1da177e4	322	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	323	.name = PCIE_MODULE_NAME,
22106368 RW	324	.port_type = PCIE_ANY_PORT,
22106368 RW	325	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	326
	327	.probe = pciehp_probe,
	328	.remove = pciehp_remove,
	329
	330	#ifdef CONFIG_PM
	331	.suspend = pciehp_suspend,
	332	.resume = pciehp_resume,
	333	#endif /* PM */
	334	};
	335
	336	static int __init pcied_init(void)
	337	{
	338	int retval = 0;
	339
c9ffa5a5	340	pciehp_firmware_init();
a8a2be94 RS	341	retval = pcie_port_service_register(&hpdriver_portdrv);
	342	dbg("pcie_port_service_register = %d\n", retval);
	343	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
c2be6f93	344	if (retval)
18b341b7	345	dbg("Failure to register service\n");
c2be6f93	346
1da177e4 LT	347	return retval;
	348	}
	349
	350	static void __exit pcied_cleanup(void)
	351	{
	352	dbg("unload_pciehpd()\n");
027e8d52	353	pcie_port_service_unregister(&hpdriver_portdrv);
1da177e4 LT	354	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	355	}
	356
	357	module_init(pcied_init);
	358	module_exit(pcied_cleanup);