[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;
static 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);
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;

	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;
	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;
	}

	/* 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));

	pciehp_set_attention_status(slot, status);
	return 0;
}


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));

	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;

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

	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;

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

	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;

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

	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;

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

	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 (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) {
		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);
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);
	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;

	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;
0b950f0f	44	static 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);
2e35afae	72	static int reset_slot (struct hotplug_slot *slot, int probe);
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;
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;
	122	}
	123
8720d27d KK	124	/* register this slot with the hotplug pci core */
	125	hotplug->info = info;
	126	hotplug->private = slot;
	127	hotplug->release = &release_slot;
586f1d66	128	hotplug->ops = ops;
8720d27d	129	slot->hotplug_slot = hotplug;
07a09694	130	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
8720d27d	131
a2359a33	132	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
385e2491	133	pci_domain_nr(ctrl->pcie->port->subordinate),
07a09694	134	ctrl->pcie->port->subordinate->number, PSN(ctrl));
8720d27d	135	retval = pci_hp_register(hotplug,
385e2491	136	ctrl->pcie->port->subordinate, 0, name);
445f7985	137	if (retval)
8720d27d KK	138	ctrl_err(ctrl,
8720d27d KK	139	"pci_hp_register failed with error %d\n", retval);
8720d27d KK	140	out:
8720d27d KK	141	if (retval) {
586f1d66	142	kfree(ops);
8720d27d KK	143	kfree(info);
8720d27d KK	144	kfree(hotplug);
1da177e4	145	}
a0b17257	146	return retval;
1da177e4 LT	147	}
1da177e4 LT	148
8720d27d	149	static void cleanup_slot(struct controller *ctrl)
1da177e4	150	{
8720d27d	151	pci_hp_deregister(ctrl->slot->hotplug_slot);
1da177e4 LT	152	}
1da177e4 LT	153
1da177e4 LT	154	/*
	155	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	156	*/
	157	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	158	{
	159	struct slot *slot = hotplug_slot->private;
	160
18b341b7	161	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	162	__func__, slot_name(slot));
1da177e4	163
6dae6202 BH	164	pciehp_set_attention_status(slot, status);
6dae6202 BH	165	return 0;
1da177e4 LT	166	}
	167
	168
	169	static int enable_slot(struct hotplug_slot *hotplug_slot)
	170	{
	171	struct slot *slot = hotplug_slot->private;
	172
18b341b7	173	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	174	__func__, slot_name(slot));
1da177e4	175
5d386e1a	176	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	177	}
	178
	179
	180	static int disable_slot(struct hotplug_slot *hotplug_slot)
	181	{
	182	struct slot *slot = hotplug_slot->private;
	183
18b341b7	184	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	185	__func__, slot_name(slot));
1da177e4	186
5d386e1a	187	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	188	}
	189
	190	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	191	{
	192	struct slot *slot = hotplug_slot->private;
1da177e4	193
18b341b7	194	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	195	__func__, slot_name(slot));
1da177e4	196
6dae6202 BH	197	pciehp_get_power_status(slot, value);
6dae6202 BH	198	return 0;
1da177e4 LT	199	}
	200
	201	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	202	{
	203	struct slot *slot = hotplug_slot->private;
1da177e4	204
18b341b7	205	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	206	__func__, slot_name(slot));
1da177e4	207
6dae6202 BH	208	pciehp_get_attention_status(slot, value);
6dae6202 BH	209	return 0;
1da177e4 LT	210	}
	211
	212	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	213	{
	214	struct slot *slot = hotplug_slot->private;
1da177e4	215
18b341b7	216	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	217	__func__, slot_name(slot));
1da177e4	218
6dae6202 BH	219	pciehp_get_latch_status(slot, value);
6dae6202 BH	220	return 0;
1da177e4 LT	221	}
	222
	223	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	224	{
	225	struct slot *slot = hotplug_slot->private;
1da177e4	226
18b341b7	227	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	228	__func__, slot_name(slot));
1da177e4	229
6dae6202 BH	230	pciehp_get_adapter_status(slot, value);
6dae6202 BH	231	return 0;
1da177e4 LT	232	}
1da177e4 LT	233
2e35afae AW	234	static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
	235	{
	236	struct slot *slot = hotplug_slot->private;
	237
	238	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
	239	__func__, slot_name(slot));
	240
	241	return pciehp_reset_slot(slot, probe);
	242	}
	243
0516c8bc	244	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	245	{
	246	int rc;
	247	struct controller *ctrl;
8720d27d	248	struct slot *slot;
8792e11f	249	u8 occupied, poweron;
125c39f7 KK	250
125c39f7 KK	251	if (pciehp_force)
7f2feec1 TI	252	dev_info(&dev->device,
7f2feec1 TI	253	"Bypassing BIOS check for pciehp use on %s\n",
8792e11f	254	pci_name(dev->port));
28eb5f27	255	else if (pciehp_acpi_slot_detection_check(dev->port))
125c39f7	256	goto err_out_none;
a073a826	257
c4635eb0	258	ctrl = pcie_init(dev);
1da177e4	259	if (!ctrl) {
18b341b7	260	dev_err(&dev->device, "Controller initialization failed\n");
c4635eb0	261	goto err_out_none;
1da177e4	262	}
b9708940	263	set_service_data(dev, ctrl);
1da177e4	264
1da177e4	265	/* Setup the slot information structures */
8720d27d	266	rc = init_slot(ctrl);
1da177e4	267	if (rc) {
f46753c5	268	if (rc == -EBUSY)
227f0647	269	ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
f46753c5	270	else
18b341b7	271	ctrl_err(ctrl, "Slot initialization failed\n");
a8c2b635	272	goto err_out_release_ctlr;
1da177e4 LT	273	}
1da177e4 LT	274
dbc7e1e5 EB	275	/* Enable events after we have setup the data structures */
	276	rc = pcie_init_notification(ctrl);
	277	if (rc) {
	278	ctrl_err(ctrl, "Notification initialization failed\n");
65b947bc	279	goto err_out_free_ctrl_slot;
dbc7e1e5 EB	280	}
dbc7e1e5 EB	281
db9aaf0b	282	/* Check if slot is occupied */
8720d27d	283	slot = ctrl->slot;
8792e11f KK	284	pciehp_get_adapter_status(slot, &occupied);
8792e11f KK	285	pciehp_get_power_status(slot, &poweron);
50b52fde RJ	286	if (occupied && pciehp_force) {
50b52fde RJ	287	mutex_lock(&slot->hotplug_lock);
8792e11f	288	pciehp_enable_slot(slot);
50b52fde RJ	289	mutex_unlock(&slot->hotplug_lock);
50b52fde RJ	290	}
8792e11f KK	291	/* If empty slot's power status is on, turn power off */
	292	if (!occupied && poweron && POWER_CTRL(ctrl))
	293	pciehp_power_off_slot(slot);
1da177e4	294
1da177e4 LT	295	return 0;
	296
	297	err_out_free_ctrl_slot:
8720d27d	298	cleanup_slot(ctrl);
a8c2b635	299	err_out_release_ctlr:
82a9e79e	300	pciehp_release_ctrl(ctrl);
1da177e4 LT	301	err_out_none:
	302	return -ENODEV;
	303	}
	304
82a9e79e	305	static void pciehp_remove(struct pcie_device *dev)
1da177e4	306	{
b9708940	307	struct controller *ctrl = get_service_data(dev);
1da177e4	308
8720d27d	309	cleanup_slot(ctrl);
82a9e79e	310	pciehp_release_ctrl(ctrl);
1da177e4 LT	311	}
	312
	313	#ifdef CONFIG_PM
3c78bc61	314	static int pciehp_suspend(struct pcie_device *dev)
1da177e4	315	{
1da177e4 LT	316	return 0;
	317	}
	318
3c78bc61	319	static int pciehp_resume(struct pcie_device *dev)
1da177e4	320	{
87683e22 ON	321	struct controller *ctrl;
	322	struct slot *slot;
	323	u8 status;
	324
87683e22	325	ctrl = get_service_data(dev);
cd2fe83a	326
87683e22 ON	327	/* reinitialize the chipset's event detection logic */
87683e22 ON	328	pcie_enable_notification(ctrl);
cd2fe83a	329
87683e22	330	slot = ctrl->slot;
cd2fe83a	331
87683e22 ON	332	/* Check if slot is occupied */
87683e22 ON	333	pciehp_get_adapter_status(slot, &status);
50b52fde	334	mutex_lock(&slot->hotplug_lock);
87683e22 ON	335	if (status)
	336	pciehp_enable_slot(slot);
	337	else
	338	pciehp_disable_slot(slot);
50b52fde	339	mutex_unlock(&slot->hotplug_lock);
1da177e4 LT	340	return 0;
1da177e4 LT	341	}
3a3c244c	342	#endif /* PM */
1da177e4	343
1da177e4	344	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	345	.name = PCIE_MODULE_NAME,
22106368 RW	346	.port_type = PCIE_ANY_PORT,
22106368 RW	347	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	348
	349	.probe = pciehp_probe,
	350	.remove = pciehp_remove,
	351
	352	#ifdef CONFIG_PM
	353	.suspend = pciehp_suspend,
	354	.resume = pciehp_resume,
	355	#endif /* PM */
	356	};
	357
	358	static int __init pcied_init(void)
	359	{
	360	int retval = 0;
	361
c9ffa5a5	362	pciehp_firmware_init();
a8a2be94	363	retval = pcie_port_service_register(&hpdriver_portdrv);
f7625980 BH	364	dbg("pcie_port_service_register = %d\n", retval);
f7625980 BH	365	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
c2be6f93	366	if (retval)
18b341b7	367	dbg("Failure to register service\n");
c2be6f93	368
1da177e4 LT	369	return retval;
	370	}
	371
	372	static void __exit pcied_cleanup(void)
	373	{
	374	dbg("unload_pciehpd()\n");
027e8d52	375	pcie_port_service_unregister(&hpdriver_portdrv);
1da177e4 LT	376	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	377	}
	378
	379	module_init(pcied_init);
	380	module_exit(pcied_cleanup);