[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 */
int pciehp_debug;
int pciehp_poll_mode;
int pciehp_poll_time;
int pciehp_force;
struct workqueue_struct *pciehp_wq;
struct workqueue_struct *pciehp_ordered_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_ordered_wq = alloc_ordered_workqueue("pciehp_ordered", 0);
	if (!pciehp_ordered_wq) {
		destroy_workqueue(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_ordered_wq);
		destroy_workqueue(pciehp_wq);
		dbg("Failure to register service\n");
	}
	return retval;
}

static void __exit pcied_cleanup(void)
{
	dbg("unload_pciehpd()\n");
	destroy_workqueue(pciehp_ordered_wq);
	destroy_workqueue(pciehp_wq);
	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
	40	/* Global variables */
	41	int pciehp_debug;
	42	int pciehp_poll_mode;
	43	int pciehp_poll_time;
a3a45ec8	44	int pciehp_force;
5d386e1a	45	struct workqueue_struct *pciehp_wq;
a827ea30	46	struct workqueue_struct *pciehp_ordered_wq;
1da177e4 LT	47
	48	#define DRIVER_VERSION "0.4"
	49	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	50	#define DRIVER_DESC "PCI Express Hot Plug Controller Driver"
	51
	52	MODULE_AUTHOR(DRIVER_AUTHOR);
	53	MODULE_DESCRIPTION(DRIVER_DESC);
	54	MODULE_LICENSE("GPL");
	55
	56	module_param(pciehp_debug, bool, 0644);
	57	module_param(pciehp_poll_mode, bool, 0644);
	58	module_param(pciehp_poll_time, int, 0644);
a3a45ec8	59	module_param(pciehp_force, bool, 0644);
1da177e4 LT	60	MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
	61	MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
	62	MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
28eb5f27	63	MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
1da177e4 LT	64
	65	#define PCIE_MODULE_NAME "pciehp"
	66
1da177e4 LT	67	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	68	static int enable_slot (struct hotplug_slot *slot);
	69	static int disable_slot (struct hotplug_slot *slot);
	70	static int get_power_status (struct hotplug_slot slot, u8 value);
	71	static int get_attention_status (struct hotplug_slot slot, u8 value);
	72	static int get_latch_status (struct hotplug_slot slot, u8 value);
	73	static int get_adapter_status (struct hotplug_slot slot, u8 value);
1da177e4	74
b308240b DS	75	/**
	76	* release_slot - free up the memory used by a slot
	77	* @hotplug_slot: slot to free
	78	*/
	79	static void release_slot(struct hotplug_slot *hotplug_slot)
	80	{
7f2feec1 TI	81	struct slot *slot = hotplug_slot->private;
7f2feec1 TI	82
18b341b7	83	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	84	__func__, hotplug_slot_name(hotplug_slot));
b308240b	85
586f1d66	86	kfree(hotplug_slot->ops);
c4635eb0 KK	87	kfree(hotplug_slot->info);
c4635eb0 KK	88	kfree(hotplug_slot);
a0b17257 KK	89	}
a0b17257 KK	90
8720d27d	91	static int init_slot(struct controller *ctrl)
1da177e4	92	{
8720d27d KK	93	struct slot *slot = ctrl->slot;
	94	struct hotplug_slot *hotplug = NULL;
	95	struct hotplug_slot_info *info = NULL;
586f1d66	96	struct hotplug_slot_ops *ops = NULL;
e1acb24f	97	char name[SLOT_NAME_SIZE];
a0b17257	98	int retval = -ENOMEM;
1da177e4	99
8720d27d KK	100	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
	101	if (!hotplug)
	102	goto out;
	103
	104	info = kzalloc(sizeof(*info), GFP_KERNEL);
	105	if (!info)
	106	goto out;
	107
586f1d66 KK	108	/* Setup hotplug slot ops */
	109	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
	110	if (!ops)
	111	goto out;
	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;
586f1d66 KK	116	if (MRL_SENS(ctrl))
	117	ops->get_latch_status = get_latch_status;
	118	if (ATTN_LED(ctrl)) {
	119	ops->get_attention_status = get_attention_status;
	120	ops->set_attention_status = set_attention_status;
	121	}
	122
8720d27d KK	123	/* register this slot with the hotplug pci core */
	124	hotplug->info = info;
	125	hotplug->private = slot;
	126	hotplug->release = &release_slot;
586f1d66	127	hotplug->ops = ops;
8720d27d	128	slot->hotplug_slot = hotplug;
07a09694	129	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	130
a2359a33	131	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
385e2491	132	pci_domain_nr(ctrl->pcie->port->subordinate),
07a09694	133	ctrl->pcie->port->subordinate->number, PSN(ctrl));
8720d27d	134	retval = pci_hp_register(hotplug,
385e2491	135	ctrl->pcie->port->subordinate, 0, name);
445f7985	136	if (retval)
8720d27d KK	137	ctrl_err(ctrl,
8720d27d KK	138	"pci_hp_register failed with 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
18b341b7	160	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	161	__func__, slot_name(slot));
1da177e4	162
445f7985	163	return pciehp_set_attention_status(slot, status);
1da177e4 LT	164	}
	165
	166
	167	static int enable_slot(struct hotplug_slot *hotplug_slot)
	168	{
	169	struct slot *slot = hotplug_slot->private;
	170
18b341b7	171	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	172	__func__, slot_name(slot));
1da177e4	173
5d386e1a	174	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	175	}
	176
	177
	178	static int disable_slot(struct hotplug_slot *hotplug_slot)
	179	{
	180	struct slot *slot = hotplug_slot->private;
	181
18b341b7	182	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	183	__func__, slot_name(slot));
1da177e4	184
5d386e1a	185	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	186	}
	187
	188	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	189	{
	190	struct slot *slot = hotplug_slot->private;
1da177e4	191
18b341b7	192	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	193	__func__, slot_name(slot));
1da177e4	194
445f7985	195	return pciehp_get_power_status(slot, value);
1da177e4 LT	196	}
	197
	198	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	199	{
	200	struct slot *slot = hotplug_slot->private;
1da177e4	201
18b341b7	202	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	203	__func__, slot_name(slot));
1da177e4	204
445f7985	205	return pciehp_get_attention_status(slot, value);
1da177e4 LT	206	}
	207
	208	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	209	{
	210	struct slot *slot = hotplug_slot->private;
1da177e4	211
18b341b7	212	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	213	__func__, slot_name(slot));
1da177e4	214
445f7985	215	return pciehp_get_latch_status(slot, value);
1da177e4 LT	216	}
	217
	218	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	219	{
	220	struct slot *slot = hotplug_slot->private;
1da177e4	221
18b341b7	222	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	223	__func__, slot_name(slot));
1da177e4	224
445f7985	225	return pciehp_get_adapter_status(slot, value);
1da177e4 LT	226	}
1da177e4 LT	227
0516c8bc	228	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	229	{
	230	int rc;
	231	struct controller *ctrl;
8720d27d	232	struct slot *slot;
8792e11f	233	u8 occupied, poweron;
125c39f7 KK	234
125c39f7 KK	235	if (pciehp_force)
7f2feec1 TI	236	dev_info(&dev->device,
7f2feec1 TI	237	"Bypassing BIOS check for pciehp use on %s\n",
8792e11f	238	pci_name(dev->port));
28eb5f27	239	else if (pciehp_acpi_slot_detection_check(dev->port))
125c39f7	240	goto err_out_none;
a073a826	241
c4635eb0	242	ctrl = pcie_init(dev);
1da177e4	243	if (!ctrl) {
18b341b7	244	dev_err(&dev->device, "Controller initialization failed\n");
c4635eb0	245	goto err_out_none;
1da177e4	246	}
b9708940	247	set_service_data(dev, ctrl);
1da177e4	248
1da177e4	249	/* Setup the slot information structures */
8720d27d	250	rc = init_slot(ctrl);
1da177e4	251	if (rc) {
f46753c5	252	if (rc == -EBUSY)
18b341b7	253	ctrl_warn(ctrl, "Slot already registered by another "
7f2feec1	254	"hotplug driver\n");
f46753c5	255	else
18b341b7	256	ctrl_err(ctrl, "Slot initialization failed\n");
a8c2b635	257	goto err_out_release_ctlr;
1da177e4 LT	258	}
1da177e4 LT	259
dbc7e1e5 EB	260	/* Enable events after we have setup the data structures */
	261	rc = pcie_init_notification(ctrl);
	262	if (rc) {
	263	ctrl_err(ctrl, "Notification initialization failed\n");
65b947bc	264	goto err_out_free_ctrl_slot;
dbc7e1e5 EB	265	}
dbc7e1e5 EB	266
db9aaf0b	267	/* Check if slot is occupied */
8720d27d	268	slot = ctrl->slot;
8792e11f KK	269	pciehp_get_adapter_status(slot, &occupied);
	270	pciehp_get_power_status(slot, &poweron);
	271	if (occupied && pciehp_force)
	272	pciehp_enable_slot(slot);
	273	/* If empty slot's power status is on, turn power off */
	274	if (!occupied && poweron && POWER_CTRL(ctrl))
	275	pciehp_power_off_slot(slot);
1da177e4	276
1da177e4 LT	277	return 0;
	278
	279	err_out_free_ctrl_slot:
8720d27d	280	cleanup_slot(ctrl);
a8c2b635	281	err_out_release_ctlr:
82a9e79e	282	pciehp_release_ctrl(ctrl);
1da177e4 LT	283	err_out_none:
	284	return -ENODEV;
	285	}
	286
82a9e79e	287	static void pciehp_remove(struct pcie_device *dev)
1da177e4	288	{
b9708940	289	struct controller *ctrl = get_service_data(dev);
1da177e4	290
8720d27d	291	cleanup_slot(ctrl);
82a9e79e	292	pciehp_release_ctrl(ctrl);
1da177e4 LT	293	}
	294
	295	#ifdef CONFIG_PM
3a3c244c	296	static int pciehp_suspend (struct pcie_device *dev)
1da177e4	297	{
7f2feec1	298	dev_info(&dev->device, "%s ENTRY\n", __func__);
1da177e4 LT	299	return 0;
	300	}
	301
	302	static int pciehp_resume (struct pcie_device *dev)
	303	{
7f2feec1	304	dev_info(&dev->device, "%s ENTRY\n", __func__);
cd2fe83a	305	if (pciehp_force) {
b9708940	306	struct controller *ctrl = get_service_data(dev);
8720d27d	307	struct slot *slot;
cd2fe83a ML	308	u8 status;
	309
	310	/* reinitialize the chipset's event detection logic */
c4635eb0	311	pcie_enable_notification(ctrl);
cd2fe83a	312
8720d27d	313	slot = ctrl->slot;
cd2fe83a ML	314
cd2fe83a ML	315	/* Check if slot is occupied */
82a9e79e	316	pciehp_get_adapter_status(slot, &status);
cd2fe83a	317	if (status)
8720d27d	318	pciehp_enable_slot(slot);
cd2fe83a	319	else
8720d27d	320	pciehp_disable_slot(slot);
cd2fe83a	321	}
1da177e4 LT	322	return 0;
1da177e4 LT	323	}
3a3c244c	324	#endif /* PM */
1da177e4	325
1da177e4	326	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	327	.name = PCIE_MODULE_NAME,
22106368 RW	328	.port_type = PCIE_ANY_PORT,
22106368 RW	329	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	330
	331	.probe = pciehp_probe,
	332	.remove = pciehp_remove,
	333
	334	#ifdef CONFIG_PM
	335	.suspend = pciehp_suspend,
	336	.resume = pciehp_resume,
	337	#endif /* PM */
	338	};
	339
	340	static int __init pcied_init(void)
	341	{
	342	int retval = 0;
	343
a827ea30 TH	344	pciehp_wq = alloc_workqueue("pciehp", 0, 0);
	345	if (!pciehp_wq)
	346	return -ENOMEM;
	347
	348	pciehp_ordered_wq = alloc_ordered_workqueue("pciehp_ordered", 0);
	349	if (!pciehp_ordered_wq) {
	350	destroy_workqueue(pciehp_wq);
	351	return -ENOMEM;
	352	}
	353
c9ffa5a5	354	pciehp_firmware_init();
a8a2be94	355	retval = pcie_port_service_register(&hpdriver_portdrv);
	356	dbg("pcie_port_service_register = %d\n", retval);
	357	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
a827ea30 TH	358	if (retval) {
	359	destroy_workqueue(pciehp_ordered_wq);
	360	destroy_workqueue(pciehp_wq);
18b341b7	361	dbg("Failure to register service\n");
a827ea30	362	}
1da177e4 LT	363	return retval;
	364	}
	365
	366	static void __exit pcied_cleanup(void)
	367	{
	368	dbg("unload_pciehpd()\n");
a827ea30 TH	369	destroy_workqueue(pciehp_ordered_wq);
a827ea30 TH	370	destroy_workqueue(pciehp_wq);
1da177e4	371	pcie_port_service_unregister(&hpdriver_portdrv);
1da177e4 LT	372	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	373	}
	374
	375	module_init(pcied_init);
	376	module_exit(pcied_cleanup);