[GitHub/mt8127/android_kernel_alcatel_ttab.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/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;

#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 _OSC and OSHP are 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 get_max_bus_speed	(struct hotplug_slot *slot, enum pci_bus_speed *value);
static int get_cur_bus_speed	(struct hotplug_slot *slot, enum pci_bus_speed *value);

static struct hotplug_slot_ops pciehp_hotplug_slot_ops = {
	.set_attention_status =	set_attention_status,
	.enable_slot =		enable_slot,
	.disable_slot =		disable_slot,
	.get_power_status =	get_power_status,
	.get_attention_status =	get_attention_status,
	.get_latch_status =	get_latch_status,
	.get_adapter_status =	get_adapter_status,
  	.get_max_bus_speed =	get_max_bus_speed,
  	.get_cur_bus_speed =	get_cur_bus_speed,
};

/**
 * 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->info);
	kfree(hotplug_slot);
}

static int init_slots(struct controller *ctrl)
{
	struct slot *slot;
	struct hotplug_slot *hotplug_slot;
	struct hotplug_slot_info *info;
	char name[SLOT_NAME_SIZE];
	int retval = -ENOMEM;

	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
		hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
		if (!hotplug_slot)
			goto error;

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

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

 		ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x "
 			 "hp_slot=%x sun=%x slot_device_offset=%x\n",
 			 pci_domain_nr(ctrl->pci_dev->subordinate),
 			 slot->bus, slot->device, slot->hp_slot, slot->number,
 			 ctrl->slot_device_offset);
		retval = pci_hp_register(hotplug_slot,
					 ctrl->pci_dev->subordinate,
					 slot->device,
					 name);
		if (retval) {
			ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
				 retval);
			goto error_info;
		}
		get_power_status(hotplug_slot, &info->power_status);
		get_attention_status(hotplug_slot, &info->attention_status);
		get_latch_status(hotplug_slot, &info->latch_status);
		get_adapter_status(hotplug_slot, &info->adapter_status);
	}

	return 0;
error_info:
	kfree(info);
error_hpslot:
	kfree(hotplug_slot);
error:
	return retval;
}

static void cleanup_slots(struct controller *ctrl)
{
	struct slot *slot;
	list_for_each_entry(slot, &ctrl->slot_list, slot_list)
		pci_hp_deregister(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));

	hotplug_slot->info->attention_status = status;

	if (ATTN_LED(slot->ctrl))
		slot->hpc_ops->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;
	int retval;

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

	retval = slot->hpc_ops->get_power_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->power_status;

	return 0;
}

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

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

	retval = slot->hpc_ops->get_attention_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->attention_status;

	return 0;
}

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

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

	retval = slot->hpc_ops->get_latch_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->latch_status;

	return 0;
}

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

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

	retval = slot->hpc_ops->get_adapter_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->adapter_status;

	return 0;
}

static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
				enum pci_bus_speed *value)
{
	struct slot *slot = hotplug_slot->private;
	int retval;

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

	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
	if (retval < 0)
		*value = PCI_SPEED_UNKNOWN;

	return 0;
}

static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
{
	struct slot *slot = hotplug_slot->private;
	int retval;

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

	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
	if (retval < 0)
		*value = PCI_SPEED_UNKNOWN;

	return 0;
}

static int pciehp_probe(struct pcie_device *dev)
{
	int rc;
	struct controller *ctrl;
	struct slot *t_slot;
	u8 value;
	struct pci_dev *pdev = dev->port;

	if (pciehp_force)
		dev_info(&dev->device,
			 "Bypassing BIOS check for pciehp use on %s\n",
			 pci_name(pdev));
	else if (pciehp_get_hp_hw_control_from_firmware(pdev))
		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_slots(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_release_ctlr;
	}

	/* Check if slot is occupied */
	t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
	t_slot->hpc_ops->get_adapter_status(t_slot, &value);
	if (value) {
		if (pciehp_force)
			pciehp_enable_slot(t_slot);
	} else {
		/* Power off slot if not occupied */
		if (POWER_CTRL(ctrl)) {
			rc = t_slot->hpc_ops->power_off_slot(t_slot);
			if (rc)
				goto err_out_free_ctrl_slot;
		}
	}

	return 0;

err_out_free_ctrl_slot:
	cleanup_slots(ctrl);
err_out_release_ctlr:
	ctrl->hpc_ops->release_ctlr(ctrl);
err_out_none:
	return -ENODEV;
}

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

	cleanup_slots(ctrl);
	ctrl->hpc_ops->release_ctlr(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 *t_slot;
		u8 status;

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

		t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);

		/* Check if slot is occupied */
		t_slot->hpc_ops->get_adapter_status(t_slot, &status);
		if (status)
			pciehp_enable_slot(t_slot);
		else
			pciehp_disable_slot(t_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>
	33	#include <linux/types.h>
1da177e4	34	#include <linux/pci.h>
1da177e4	35	#include "pciehp.h"
1da177e4	36	#include <linux/interrupt.h>
34d03419	37	#include <linux/time.h>
1da177e4 LT	38
	39	/* Global variables */
	40	int pciehp_debug;
	41	int pciehp_poll_mode;
	42	int pciehp_poll_time;
a3a45ec8	43	int pciehp_force;
5d386e1a	44	struct workqueue_struct *pciehp_wq;
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");
a3a45ec8	61	MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are 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);
	72	static int get_max_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	73	static int get_cur_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	74
	75	static struct hotplug_slot_ops pciehp_hotplug_slot_ops = {
1da177e4 LT	76	.set_attention_status = set_attention_status,
	77	.enable_slot = enable_slot,
	78	.disable_slot = disable_slot,
	79	.get_power_status = get_power_status,
	80	.get_attention_status = get_attention_status,
	81	.get_latch_status = get_latch_status,
	82	.get_adapter_status = get_adapter_status,
	83	.get_max_bus_speed = get_max_bus_speed,
	84	.get_cur_bus_speed = get_cur_bus_speed,
	85	};
	86
b308240b DS	87	/**
	88	* release_slot - free up the memory used by a slot
	89	* @hotplug_slot: slot to free
	90	*/
	91	static void release_slot(struct hotplug_slot *hotplug_slot)
	92	{
7f2feec1 TI	93	struct slot *slot = hotplug_slot->private;
7f2feec1 TI	94
18b341b7	95	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	96	__func__, hotplug_slot_name(hotplug_slot));
b308240b	97
c4635eb0 KK	98	kfree(hotplug_slot->info);
c4635eb0 KK	99	kfree(hotplug_slot);
a0b17257 KK	100	}
a0b17257 KK	101
1da177e4 LT	102	static int init_slots(struct controller *ctrl)
1da177e4 LT	103	{
121082e2	104	struct slot *slot;
121082e2	105	struct hotplug_slot *hotplug_slot;
a0b17257	106	struct hotplug_slot_info *info;
e1acb24f	107	char name[SLOT_NAME_SIZE];
a0b17257	108	int retval = -ENOMEM;
1da177e4	109
c4635eb0	110	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
a0b17257 KK	111	hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
a0b17257 KK	112	if (!hotplug_slot)
c4635eb0	113	goto error;
1da177e4	114
a0b17257 KK	115	info = kzalloc(sizeof(*info), GFP_KERNEL);
a0b17257 KK	116	if (!info)
1da177e4	117	goto error_hpslot;
1da177e4 LT	118
1da177e4 LT	119	/* register this slot with the hotplug pci core */
c4635eb0	120	hotplug_slot->info = info;
121082e2 JJ	121	hotplug_slot->private = slot;
121082e2 JJ	122	hotplug_slot->release = &release_slot;
121082e2	123	hotplug_slot->ops = &pciehp_hotplug_slot_ops;
c4635eb0	124	slot->hotplug_slot = hotplug_slot;
e1acb24f	125	snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
121082e2	126
18b341b7 TI	127	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x "
	128	"hp_slot=%x sun=%x slot_device_offset=%x\n",
	129	pci_domain_nr(ctrl->pci_dev->subordinate),
	130	slot->bus, slot->device, slot->hp_slot, slot->number,
	131	ctrl->slot_device_offset);
f46753c5 AC	132	retval = pci_hp_register(hotplug_slot,
f46753c5 AC	133	ctrl->pci_dev->subordinate,
1359f270	134	slot->device,
e1acb24f	135	name);
a0b17257	136	if (retval) {
7f2feec1 TI	137	ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
7f2feec1 TI	138	retval);
a0b17257	139	goto error_info;
1da177e4	140	}
e1acb24f AC	141	get_power_status(hotplug_slot, &info->power_status);
	142	get_attention_status(hotplug_slot, &info->attention_status);
	143	get_latch_status(hotplug_slot, &info->latch_status);
	144	get_adapter_status(hotplug_slot, &info->adapter_status);
1da177e4 LT	145	}
	146
	147	return 0;
1da177e4	148	error_info:
a0b17257	149	kfree(info);
1da177e4	150	error_hpslot:
121082e2	151	kfree(hotplug_slot);
1da177e4	152	error:
a0b17257	153	return retval;
1da177e4 LT	154	}
1da177e4 LT	155
2410fa4e	156	static void cleanup_slots(struct controller *ctrl)
1da177e4	157	{
2410fa4e	158	struct slot *slot;
bd3d99c1	159	list_for_each_entry(slot, &ctrl->slot_list, slot_list)
2410fa4e	160	pci_hp_deregister(slot->hotplug_slot);
1da177e4 LT	161	}
1da177e4 LT	162
1da177e4 LT	163	/*
	164	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	165	*/
	166	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
	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 LT	172
1da177e4 LT	173	hotplug_slot->info->attention_status = status;
a073a826	174
ae416e6b	175	if (ATTN_LED(slot->ctrl))
1da177e4 LT	176	slot->hpc_ops->set_attention_status(slot, status);
	177
	178	return 0;
	179	}
	180
	181
	182	static int enable_slot(struct hotplug_slot *hotplug_slot)
	183	{
	184	struct slot *slot = hotplug_slot->private;
	185
18b341b7	186	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	187	__func__, slot_name(slot));
1da177e4	188
5d386e1a	189	return pciehp_sysfs_enable_slot(slot);
1da177e4 LT	190	}
	191
	192
	193	static int disable_slot(struct hotplug_slot *hotplug_slot)
	194	{
	195	struct slot *slot = hotplug_slot->private;
	196
18b341b7	197	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	198	__func__, slot_name(slot));
1da177e4	199
5d386e1a	200	return pciehp_sysfs_disable_slot(slot);
1da177e4 LT	201	}
	202
	203	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
	204	{
	205	struct slot *slot = hotplug_slot->private;
	206	int retval;
	207
18b341b7	208	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	209	__func__, slot_name(slot));
1da177e4 LT	210
	211	retval = slot->hpc_ops->get_power_status(slot, value);
	212	if (retval < 0)
	213	*value = hotplug_slot->info->power_status;
	214
	215	return 0;
	216	}
	217
	218	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
	219	{
	220	struct slot *slot = hotplug_slot->private;
	221	int retval;
	222
18b341b7	223	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	224	__func__, slot_name(slot));
1da177e4 LT	225
	226	retval = slot->hpc_ops->get_attention_status(slot, value);
	227	if (retval < 0)
	228	*value = hotplug_slot->info->attention_status;
	229
	230	return 0;
	231	}
	232
	233	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
	234	{
	235	struct slot *slot = hotplug_slot->private;
	236	int retval;
	237
18b341b7	238	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	239	__func__, slot_name(slot));
1da177e4 LT	240
	241	retval = slot->hpc_ops->get_latch_status(slot, value);
	242	if (retval < 0)
	243	*value = hotplug_slot->info->latch_status;
	244
	245	return 0;
	246	}
	247
	248	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
	249	{
	250	struct slot *slot = hotplug_slot->private;
	251	int retval;
	252
18b341b7	253	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	254	__func__, slot_name(slot));
1da177e4 LT	255
	256	retval = slot->hpc_ops->get_adapter_status(slot, value);
	257	if (retval < 0)
	258	*value = hotplug_slot->info->adapter_status;
	259
	260	return 0;
	261	}
	262
f46753c5 AC	263	static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
f46753c5 AC	264	enum pci_bus_speed *value)
1da177e4 LT	265	{
	266	struct slot *slot = hotplug_slot->private;
	267	int retval;
	268
18b341b7	269	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	270	__func__, slot_name(slot));
a073a826	271
1da177e4 LT	272	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
	273	if (retval < 0)
	274	*value = PCI_SPEED_UNKNOWN;
	275
	276	return 0;
	277	}
	278
	279	static int get_cur_bus_speed(struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	280	{
	281	struct slot *slot = hotplug_slot->private;
	282	int retval;
	283
18b341b7	284	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
e1acb24f	285	__func__, slot_name(slot));
a073a826	286
1da177e4 LT	287	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
	288	if (retval < 0)
	289	*value = PCI_SPEED_UNKNOWN;
	290
	291	return 0;
	292	}
	293
0516c8bc	294	static int pciehp_probe(struct pcie_device *dev)
1da177e4 LT	295	{
	296	int rc;
	297	struct controller *ctrl;
	298	struct slot *t_slot;
1da177e4	299	u8 value;
125c39f7 KK	300	struct pci_dev *pdev = dev->port;
	301
	302	if (pciehp_force)
7f2feec1 TI	303	dev_info(&dev->device,
	304	"Bypassing BIOS check for pciehp use on %s\n",
	305	pci_name(pdev));
125c39f7 KK	306	else if (pciehp_get_hp_hw_control_from_firmware(pdev))
125c39f7 KK	307	goto err_out_none;
a073a826	308
c4635eb0	309	ctrl = pcie_init(dev);
1da177e4	310	if (!ctrl) {
18b341b7	311	dev_err(&dev->device, "Controller initialization failed\n");
c4635eb0	312	goto err_out_none;
1da177e4	313	}
b9708940	314	set_service_data(dev, ctrl);
1da177e4	315
1da177e4 LT	316	/* Setup the slot information structures */
	317	rc = init_slots(ctrl);
	318	if (rc) {
f46753c5	319	if (rc == -EBUSY)
18b341b7	320	ctrl_warn(ctrl, "Slot already registered by another "
7f2feec1	321	"hotplug driver\n");
f46753c5	322	else
18b341b7	323	ctrl_err(ctrl, "Slot initialization failed\n");
a8c2b635	324	goto err_out_release_ctlr;
1da177e4 LT	325	}
1da177e4 LT	326
dbc7e1e5 EB	327	/* Enable events after we have setup the data structures */
	328	rc = pcie_init_notification(ctrl);
	329	if (rc) {
	330	ctrl_err(ctrl, "Notification initialization failed\n");
	331	goto err_out_release_ctlr;
	332	}
	333
db9aaf0b	334	/* Check if slot is occupied */
48fe3915	335	t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
db9aaf0b KK	336	t_slot->hpc_ops->get_adapter_status(t_slot, &value);
	337	if (value) {
	338	if (pciehp_force)
	339	pciehp_enable_slot(t_slot);
	340	} else {
	341	/* Power off slot if not occupied */
	342	if (POWER_CTRL(ctrl)) {
	343	rc = t_slot->hpc_ops->power_off_slot(t_slot);
	344	if (rc)
	345	goto err_out_free_ctrl_slot;
	346	}
1da177e4 LT	347	}
1da177e4 LT	348
1da177e4 LT	349	return 0;
	350
	351	err_out_free_ctrl_slot:
	352	cleanup_slots(ctrl);
a8c2b635	353	err_out_release_ctlr:
1da177e4	354	ctrl->hpc_ops->release_ctlr(ctrl);
1da177e4 LT	355	err_out_none:
	356	return -ENODEV;
	357	}
	358
92333526	359	static void pciehp_remove (struct pcie_device *dev)
1da177e4	360	{
b9708940	361	struct controller *ctrl = get_service_data(dev);
1da177e4	362
92333526 KK	363	cleanup_slots(ctrl);
92333526 KK	364	ctrl->hpc_ops->release_ctlr(ctrl);
1da177e4 LT	365	}
	366
	367	#ifdef CONFIG_PM
3a3c244c	368	static int pciehp_suspend (struct pcie_device *dev)
1da177e4	369	{
7f2feec1	370	dev_info(&dev->device, "%s ENTRY\n", __func__);
1da177e4 LT	371	return 0;
	372	}
	373
	374	static int pciehp_resume (struct pcie_device *dev)
	375	{
7f2feec1	376	dev_info(&dev->device, "%s ENTRY\n", __func__);
cd2fe83a	377	if (pciehp_force) {
b9708940	378	struct controller *ctrl = get_service_data(dev);
cd2fe83a ML	379	struct slot *t_slot;
	380	u8 status;
	381
	382	/* reinitialize the chipset's event detection logic */
c4635eb0	383	pcie_enable_notification(ctrl);
cd2fe83a ML	384
	385	t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
	386
	387	/* Check if slot is occupied */
	388	t_slot->hpc_ops->get_adapter_status(t_slot, &status);
	389	if (status)
	390	pciehp_enable_slot(t_slot);
	391	else
	392	pciehp_disable_slot(t_slot);
	393	}
1da177e4 LT	394	return 0;
1da177e4 LT	395	}
3a3c244c	396	#endif /* PM */
1da177e4	397
1da177e4	398	static struct pcie_port_service_driver hpdriver_portdrv = {
83e9ad54	399	.name = PCIE_MODULE_NAME,
22106368 RW	400	.port_type = PCIE_ANY_PORT,
22106368 RW	401	.service = PCIE_PORT_SERVICE_HP,
1da177e4 LT	402
	403	.probe = pciehp_probe,
	404	.remove = pciehp_remove,
	405
	406	#ifdef CONFIG_PM
	407	.suspend = pciehp_suspend,
	408	.resume = pciehp_resume,
	409	#endif /* PM */
	410	};
	411
	412	static int __init pcied_init(void)
	413	{
	414	int retval = 0;
	415
c9ffa5a5	416	pciehp_firmware_init();
a8a2be94 RS	417	retval = pcie_port_service_register(&hpdriver_portdrv);
	418	dbg("pcie_port_service_register = %d\n", retval);
	419	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	420	if (retval)
18b341b7	421	dbg("Failure to register service\n");
1da177e4 LT	422	return retval;
	423	}
	424
	425	static void __exit pcied_cleanup(void)
	426	{
	427	dbg("unload_pciehpd()\n");
1da177e4	428	pcie_port_service_unregister(&hpdriver_portdrv);
1da177e4 LT	429	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	430	}
	431
	432	module_init(pcied_init);
	433	module_exit(pcied_cleanup);