[deliverable/linux.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;
struct workqueue_struct *pciehp_wq;

#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)
{
	dev_info(&dev->device, "%s ENTRY\n", __func__);
	return 0;
}

static int pciehp_resume (struct pcie_device *dev)
{
	dev_info(&dev->device, "%s ENTRY\n", __func__);
	if (pciehp_force) {
		struct controller *ctrl = get_service_data(dev);
		struct slot *slot;
		u8 status;

		/* 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_wq = alloc_workqueue("pciehp", 0, 0);
	if (!pciehp_wq)
		return -ENOMEM;

	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) {
		destroy_workqueue(pciehp_wq);
		dbg("Failure to register service\n");
	}
	return retval;
}

static void __exit pcied_cleanup(void)
{
	dbg("unload_pciehpd()\n");
	pcie_port_service_unregister(&hpdriver_portdrv);
	destroy_workqueue(pciehp_wq);
	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;
5d386e1a	45	struct workqueue_struct *pciehp_wq;
1da177e4 LT	46
	47	#define DRIVER_VERSION "0.4"
	48	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	49	#define DRIVER_DESC "PCI Express Hot Plug Controller Driver"
	50
	51	MODULE_AUTHOR(DRIVER_AUTHOR);
	52	MODULE_DESCRIPTION(DRIVER_DESC);
	53	MODULE_LICENSE("GPL");
	54
	55	module_param(pciehp_debug, bool, 0644);
	56	module_param(pciehp_poll_mode, bool, 0644);
	57	module_param(pciehp_poll_time, int, 0644);
a3a45ec8	58	module_param(pciehp_force, bool, 0644);
1da177e4 LT	59	MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
	60	MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
	61	MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
28eb5f27	62	MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
1da177e4 LT	63
	64	#define PCIE_MODULE_NAME "pciehp"
	65
1da177e4 LT	66	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	67	static int enable_slot (struct hotplug_slot *slot);
	68	static int disable_slot (struct hotplug_slot *slot);
	69	static int get_power_status (struct hotplug_slot slot, u8 value);
	70	static int get_attention_status (struct hotplug_slot slot, u8 value);
	71	static int get_latch_status (struct hotplug_slot slot, u8 value);
	72	static int get_adapter_status (struct hotplug_slot slot, u8 value);
1da177e4	73
b308240b DS	74	/**
	75	* release_slot - free up the memory used by a slot
	76	* @hotplug_slot: slot to free
	77	*/
	78	static void release_slot(struct hotplug_slot *hotplug_slot)
	79	{
7f2feec1 TI	80	struct slot *slot = hotplug_slot->private;
7f2feec1 TI	81
18b341b7	82	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	83	__func__, hotplug_slot_name(hotplug_slot));
b308240b	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;
	111	ops->enable_slot = enable_slot;
	112	ops->disable_slot = disable_slot;
	113	ops->get_power_status = get_power_status;
	114	ops->get_adapter_status = get_adapter_status;
586f1d66 KK	115	if (MRL_SENS(ctrl))
	116	ops->get_latch_status = get_latch_status;
	117	if (ATTN_LED(ctrl)) {
	118	ops->get_attention_status = get_attention_status;
	119	ops->set_attention_status = set_attention_status;
	120	}
	121
8720d27d KK	122	/* register this slot with the hotplug pci core */
	123	hotplug->info = info;
	124	hotplug->private = slot;
	125	hotplug->release = &release_slot;
586f1d66	126	hotplug->ops = ops;
8720d27d	127	slot->hotplug_slot = hotplug;
07a09694	128	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	129
a2359a33	130	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
385e2491	131	pci_domain_nr(ctrl->pcie->port->subordinate),
07a09694	132	ctrl->pcie->port->subordinate->number, PSN(ctrl));
8720d27d	133	retval = pci_hp_register(hotplug,
385e2491	134	ctrl->pcie->port->subordinate, 0, name);
445f7985	135	if (retval)
8720d27d KK	136	ctrl_err(ctrl,
8720d27d KK	137	"pci_hp_register failed with error %d\n", retval);
8720d27d KK	138	out:
8720d27d KK	139	if (retval) {
586f1d66	140	kfree(ops);
8720d27d KK	141	kfree(info);
8720d27d KK	142	kfree(hotplug);
1da177e4	143	}
a0b17257	144	return retval;
1da177e4 LT	145	}
1da177e4 LT	146
8720d27d	147	static void cleanup_slot(struct controller *ctrl)
1da177e4	148	{
8720d27d	149	pci_hp_deregister(ctrl->slot->hotplug_slot);
1da177e4 LT	150	}
1da177e4 LT	151
1da177e4 LT	152	/*
	153	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	154	*/
	155	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	156	{
	157	struct slot *slot = hotplug_slot->private;
	158
18b341b7	159	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	160	__func__, slot_name(slot));
1da177e4	161
445f7985	162	return pciehp_set_attention_status(slot, status);
1da177e4 LT	163	}
	164
	165
	166	static int enable_slot(struct hotplug_slot *hotplug_slot)
	167	{
	168	struct slot *slot = hotplug_slot->private;
	169
18b341b7	170	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	171	__func__, slot_name(slot));
1da177e4	172
5d386e1a	173	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	174	}
	175
	176
	177	static int disable_slot(struct hotplug_slot *hotplug_slot)
	178	{
	179	struct slot *slot = hotplug_slot->private;
	180
18b341b7	181	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	182	__func__, slot_name(slot));
1da177e4	183
5d386e1a	184	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	185	}
	186
	187	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	188	{
	189	struct slot *slot = hotplug_slot->private;
1da177e4	190
18b341b7	191	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	192	__func__, slot_name(slot));
1da177e4	193
445f7985	194	return pciehp_get_power_status(slot, value);
1da177e4 LT	195	}
	196
	197	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	198	{
	199	struct slot *slot = hotplug_slot->private;
1da177e4	200
18b341b7	201	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	202	__func__, slot_name(slot));
1da177e4	203
445f7985	204	return pciehp_get_attention_status(slot, value);
1da177e4 LT	205	}
	206
	207	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	208	{
	209	struct slot *slot = hotplug_slot->private;
1da177e4	210
18b341b7	211	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	212	__func__, slot_name(slot));
1da177e4	213
445f7985	214	return pciehp_get_latch_status(slot, value);
1da177e4 LT	215	}
	216
	217	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	218	{
	219	struct slot *slot = hotplug_slot->private;
1da177e4	220
18b341b7	221	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	222	__func__, slot_name(slot));
1da177e4	223
445f7985	224	return pciehp_get_adapter_status(slot, value);
1da177e4 LT	225	}
1da177e4 LT	226
0516c8bc	227	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	228	{
	229	int rc;
	230	struct controller *ctrl;
8720d27d	231	struct slot *slot;
8792e11f	232	u8 occupied, poweron;
125c39f7 KK	233
125c39f7 KK	234	if (pciehp_force)
7f2feec1 TI	235	dev_info(&dev->device,
7f2feec1 TI	236	"Bypassing BIOS check for pciehp use on %s\n",
8792e11f	237	pci_name(dev->port));
28eb5f27	238	else if (pciehp_acpi_slot_detection_check(dev->port))
125c39f7	239	goto err_out_none;
a073a826	240
c4635eb0	241	ctrl = pcie_init(dev);
1da177e4	242	if (!ctrl) {
18b341b7	243	dev_err(&dev->device, "Controller initialization failed\n");
c4635eb0	244	goto err_out_none;
1da177e4	245	}
b9708940	246	set_service_data(dev, ctrl);
1da177e4	247
1da177e4	248	/* Setup the slot information structures */
8720d27d	249	rc = init_slot(ctrl);
1da177e4	250	if (rc) {
f46753c5	251	if (rc == -EBUSY)
18b341b7	252	ctrl_warn(ctrl, "Slot already registered by another "
7f2feec1	253	"hotplug driver\n");
f46753c5	254	else
18b341b7	255	ctrl_err(ctrl, "Slot initialization failed\n");
a8c2b635	256	goto err_out_release_ctlr;
1da177e4 LT	257	}
1da177e4 LT	258
dbc7e1e5 EB	259	/* Enable events after we have setup the data structures */
	260	rc = pcie_init_notification(ctrl);
	261	if (rc) {
	262	ctrl_err(ctrl, "Notification initialization failed\n");
65b947bc	263	goto err_out_free_ctrl_slot;
dbc7e1e5 EB	264	}
dbc7e1e5 EB	265
db9aaf0b	266	/* Check if slot is occupied */
8720d27d	267	slot = ctrl->slot;
8792e11f KK	268	pciehp_get_adapter_status(slot, &occupied);
	269	pciehp_get_power_status(slot, &poweron);
	270	if (occupied && pciehp_force)
	271	pciehp_enable_slot(slot);
	272	/* If empty slot's power status is on, turn power off */
	273	if (!occupied && poweron && POWER_CTRL(ctrl))
	274	pciehp_power_off_slot(slot);
1da177e4	275
1da177e4 LT	276	return 0;
	277
	278	err_out_free_ctrl_slot:
8720d27d	279	cleanup_slot(ctrl);
a8c2b635	280	err_out_release_ctlr:
82a9e79e	281	pciehp_release_ctrl(ctrl);
1da177e4 LT	282	err_out_none:
	283	return -ENODEV;
	284	}
	285
82a9e79e	286	static void pciehp_remove(struct pcie_device *dev)
1da177e4	287	{
b9708940	288	struct controller *ctrl = get_service_data(dev);
1da177e4	289
8720d27d	290	cleanup_slot(ctrl);
82a9e79e	291	pciehp_release_ctrl(ctrl);
1da177e4 LT	292	}
	293
	294	#ifdef CONFIG_PM
3a3c244c	295	static int pciehp_suspend (struct pcie_device *dev)
1da177e4	296	{
7f2feec1	297	dev_info(&dev->device, "%s ENTRY\n", __func__);
1da177e4 LT	298	return 0;
	299	}
	300
	301	static int pciehp_resume (struct pcie_device *dev)
	302	{
7f2feec1	303	dev_info(&dev->device, "%s ENTRY\n", __func__);
cd2fe83a	304	if (pciehp_force) {
b9708940	305	struct controller *ctrl = get_service_data(dev);
8720d27d	306	struct slot *slot;
cd2fe83a ML	307	u8 status;
	308
	309	/* reinitialize the chipset's event detection logic */
c4635eb0	310	pcie_enable_notification(ctrl);
cd2fe83a	311
8720d27d	312	slot = ctrl->slot;
cd2fe83a ML	313
cd2fe83a ML	314	/* Check if slot is occupied */
82a9e79e	315	pciehp_get_adapter_status(slot, &status);
cd2fe83a	316	if (status)
8720d27d	317	pciehp_enable_slot(slot);
cd2fe83a	318	else
8720d27d	319	pciehp_disable_slot(slot);
cd2fe83a	320	}
1da177e4 LT	321	return 0;
1da177e4 LT	322	}
3a3c244c	323	#endif /* PM */
1da177e4	324
1da177e4	325	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	326	.name = PCIE_MODULE_NAME,
22106368 RW	327	.port_type = PCIE_ANY_PORT,
22106368 RW	328	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	329
	330	.probe = pciehp_probe,
	331	.remove = pciehp_remove,
	332
	333	#ifdef CONFIG_PM
	334	.suspend = pciehp_suspend,
	335	.resume = pciehp_resume,
	336	#endif /* PM */
	337	};
	338
	339	static int __init pcied_init(void)
	340	{
	341	int retval = 0;
	342
a827ea30 TH	343	pciehp_wq = alloc_workqueue("pciehp", 0, 0);
	344	if (!pciehp_wq)
	345	return -ENOMEM;
	346
c9ffa5a5	347	pciehp_firmware_init();
a8a2be94	348	retval = pcie_port_service_register(&hpdriver_portdrv);
	349	dbg("pcie_port_service_register = %d\n", retval);
	350	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
a827ea30	351	if (retval) {
a827ea30	352	destroy_workqueue(pciehp_wq);
18b341b7	353	dbg("Failure to register service\n");
a827ea30	354	}
1da177e4 LT	355	return retval;
	356	}
	357
	358	static void __exit pcied_cleanup(void)
	359	{
	360	dbg("unload_pciehpd()\n");
027e8d52	361	pcie_port_service_unregister(&hpdriver_portdrv);
a827ea30	362	destroy_workqueue(pciehp_wq);
1da177e4 LT	363	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	364	}
	365
	366	module_init(pcied_init);
	367	module_exit(pcied_cleanup);