[net-next-2.6.git] / drivers / pci / hotplug / shpchp_core.c

/*
 * Standard 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/slab.h>
#include <linux/pci.h>
#include <linux/workqueue.h>
#include "shpchp.h"

/* Global variables */
int shpchp_debug;
int shpchp_poll_mode;
int shpchp_poll_time;
struct workqueue_struct *shpchp_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	"Standard Hot Plug PCI Controller Driver"

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

module_param(shpchp_debug, bool, 0644);
module_param(shpchp_poll_mode, bool, 0644);
module_param(shpchp_poll_time, int, 0644);
MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");

#define SHPC_MODULE_NAME "shpchp"

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 struct hotplug_slot_ops shpchp_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,
};

/**
 * 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__, slot_name(slot));

	kfree(slot->hotplug_slot->info);
	kfree(slot->hotplug_slot);
	kfree(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;
	int i;

	for (i = 0; i < ctrl->num_slots; i++) {
		slot = kzalloc(sizeof(*slot), GFP_KERNEL);
		if (!slot)
			goto error;

		hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
		if (!hotplug_slot)
			goto error_slot;
		slot->hotplug_slot = hotplug_slot;

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

		slot->hp_slot = i;
		slot->ctrl = ctrl;
		slot->bus = ctrl->pci_dev->subordinate->number;
		slot->device = ctrl->slot_device_offset + i;
		slot->hpc_ops = ctrl->hpc_ops;
		slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);
		mutex_init(&slot->lock);
		INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);

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

 		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(slot->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);

		list_add(&slot->slot_list, &ctrl->slot_list);
	}

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

void cleanup_slots(struct controller *ctrl)
{
	struct list_head *tmp;
	struct list_head *next;
	struct slot *slot;

	list_for_each_safe(tmp, next, &ctrl->slot_list) {
		slot = list_entry(tmp, struct slot, slot_list);
		list_del(&slot->slot_list);
		cancel_delayed_work(&slot->work);
		flush_scheduled_work();
		flush_workqueue(shpchp_wq);
		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 = get_slot(hotplug_slot);

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

	hotplug_slot->info->attention_status = status;
	slot->hpc_ops->set_attention_status(slot, status);

	return 0;
}

static int enable_slot (struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = get_slot(hotplug_slot);

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

	return shpchp_sysfs_enable_slot(slot);
}

static int disable_slot (struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = get_slot(hotplug_slot);

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

	return shpchp_sysfs_disable_slot(slot);
}

static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot);
	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 = get_slot(hotplug_slot);
	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 = get_slot(hotplug_slot);
	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 = get_slot(hotplug_slot);
	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 is_shpc_capable(struct pci_dev *dev)
{
	if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device ==
						PCI_DEVICE_ID_AMD_GOLAM_7450))
		return 1;
	if (!pci_find_capability(dev, PCI_CAP_ID_SHPC))
		return 0;
	if (get_hp_hw_control_from_firmware(dev))
		return 0;
	return 1;
}

static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int rc;
	struct controller *ctrl;

	if (!is_shpc_capable(pdev))
		return -ENODEV;

	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
	if (!ctrl) {
		dev_err(&pdev->dev, "%s: Out of memory\n", __func__);
		goto err_out_none;
	}
	INIT_LIST_HEAD(&ctrl->slot_list);

	rc = shpc_init(ctrl, pdev);
	if (rc) {
		ctrl_dbg(ctrl, "Controller initialization failed\n");
		goto err_out_free_ctrl;
	}

	pci_set_drvdata(pdev, ctrl);

	/* Setup the slot information structures */
	rc = init_slots(ctrl);
	if (rc) {
		ctrl_err(ctrl, "Slot initialization failed\n");
		goto err_out_release_ctlr;
	}

	rc = shpchp_create_ctrl_files(ctrl);
	if (rc)
		goto err_cleanup_slots;

	return 0;

err_cleanup_slots:
	cleanup_slots(ctrl);
err_out_release_ctlr:
	ctrl->hpc_ops->release_ctlr(ctrl);
err_out_free_ctrl:
	kfree(ctrl);
err_out_none:
	return -ENODEV;
}

static void shpc_remove(struct pci_dev *dev)
{
	struct controller *ctrl = pci_get_drvdata(dev);

	shpchp_remove_ctrl_files(ctrl);
	ctrl->hpc_ops->release_ctlr(ctrl);
	kfree(ctrl);
}

static struct pci_device_id shpcd_pci_tbl[] = {
	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)},
	{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);

static struct pci_driver shpc_driver = {
	.name =		SHPC_MODULE_NAME,
	.id_table =	shpcd_pci_tbl,
	.probe =	shpc_probe,
	.remove =	shpc_remove,
};

static int __init shpcd_init(void)
{
	int retval = 0;

	retval = pci_register_driver(&shpc_driver);
	dbg("%s: pci_register_driver = %d\n", __func__, retval);
	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	return retval;
}

static void __exit shpcd_cleanup(void)
{
	dbg("unload_shpchpd()\n");
	pci_unregister_driver(&shpc_driver);
	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}

module_init(shpcd_init);
module_exit(shpcd_cleanup);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Standard 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>
5a0e3ad6	34	#include <linux/slab.h>
1da177e4	35	#include <linux/pci.h>
f7391f53	36	#include <linux/workqueue.h>
1da177e4	37	#include "shpchp.h"
1da177e4 LT	38
	39	/* Global variables */
	40	int shpchp_debug;
	41	int shpchp_poll_mode;
	42	int shpchp_poll_time;
f7391f53	43	struct workqueue_struct *shpchp_wq;
1da177e4 LT	44
	45	#define DRIVER_VERSION "0.4"
	46	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	47	#define DRIVER_DESC "Standard Hot Plug PCI Controller Driver"
	48
	49	MODULE_AUTHOR(DRIVER_AUTHOR);
	50	MODULE_DESCRIPTION(DRIVER_DESC);
	51	MODULE_LICENSE("GPL");
	52
	53	module_param(shpchp_debug, bool, 0644);
	54	module_param(shpchp_poll_mode, bool, 0644);
	55	module_param(shpchp_poll_time, int, 0644);
	56	MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
	57	MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
	58	MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");
	59
	60	#define SHPC_MODULE_NAME "shpchp"
	61
1da177e4 LT	62	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	63	static int enable_slot (struct hotplug_slot *slot);
	64	static int disable_slot (struct hotplug_slot *slot);
	65	static int get_power_status (struct hotplug_slot slot, u8 value);
	66	static int get_attention_status (struct hotplug_slot slot, u8 value);
	67	static int get_latch_status (struct hotplug_slot slot, u8 value);
	68	static int get_adapter_status (struct hotplug_slot slot, u8 value);
1da177e4 LT	69
1da177e4 LT	70	static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
1da177e4 LT	71	.set_attention_status = set_attention_status,
	72	.enable_slot = enable_slot,
	73	.disable_slot = disable_slot,
	74	.get_power_status = get_power_status,
	75	.get_attention_status = get_attention_status,
	76	.get_latch_status = get_latch_status,
	77	.get_adapter_status = get_adapter_status,
1da177e4 LT	78	};
	79
	80	/**
	81	* release_slot - free up the memory used by a slot
	82	* @hotplug_slot: slot to free
	83	*/
	84	static void release_slot(struct hotplug_slot *hotplug_slot)
	85	{
ee17fd93	86	struct slot *slot = hotplug_slot->private;
1da177e4	87
be7bce25	88	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	89	__func__, slot_name(slot));
1da177e4 LT	90
1da177e4 LT	91	kfree(slot->hotplug_slot->info);
1da177e4 LT	92	kfree(slot->hotplug_slot);
	93	kfree(slot);
	94	}
	95
	96	static int init_slots(struct controller *ctrl)
	97	{
926030f6 KK	98	struct slot *slot;
	99	struct hotplug_slot *hotplug_slot;
	100	struct hotplug_slot_info *info;
66f17055	101	char name[SLOT_NAME_SIZE];
926030f6	102	int retval = -ENOMEM;
5fe6cc60	103	int i;
926030f6 KK	104
926030f6 KK	105	for (i = 0; i < ctrl->num_slots; i++) {
57c95c0d	106	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
926030f6	107	if (!slot)
1da177e4 LT	108	goto error;
1da177e4 LT	109
57c95c0d	110	hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
926030f6	111	if (!hotplug_slot)
1da177e4	112	goto error_slot;
926030f6	113	slot->hotplug_slot = hotplug_slot;
1da177e4	114
57c95c0d	115	info = kzalloc(sizeof(*info), GFP_KERNEL);
926030f6	116	if (!info)
1da177e4	117	goto error_hpslot;
926030f6 KK	118	hotplug_slot->info = info;
926030f6 KK	119
926030f6	120	slot->hp_slot = i;
926030f6	121	slot->ctrl = ctrl;
227b84c7	122	slot->bus = ctrl->pci_dev->subordinate->number;
926030f6 KK	123	slot->device = ctrl->slot_device_offset + i;
926030f6 KK	124	slot->hpc_ops = ctrl->hpc_ops;
6f39be2e	125	slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);
a246fa4e	126	mutex_init(&slot->lock);
e325e1f0	127	INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);
1da177e4 LT	128
1da177e4 LT	129	/* register this slot with the hotplug pci core */
926030f6 KK	130	hotplug_slot->private = slot;
926030f6 KK	131	hotplug_slot->release = &release_slot;
66f17055	132	snprintf(name, SLOT_NAME_SIZE, "%d", slot->number);
926030f6 KK	133	hotplug_slot->ops = &shpchp_hotplug_slot_ops;
926030f6 KK	134
be7bce25 TI	135	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x "
	136	"hp_slot=%x sun=%x slot_device_offset=%x\n",
	137	pci_domain_nr(ctrl->pci_dev->subordinate),
	138	slot->bus, slot->device, slot->hp_slot, slot->number,
	139	ctrl->slot_device_offset);
f46753c5	140	retval = pci_hp_register(slot->hotplug_slot,
66f17055	141	ctrl->pci_dev->subordinate, slot->device, name);
926030f6	142	if (retval) {
f98ca311 TI	143	ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
f98ca311 TI	144	retval);
bbe779db	145	goto error_info;
1da177e4 LT	146	}
1da177e4 LT	147
66f17055 AC	148	get_power_status(hotplug_slot, &info->power_status);
	149	get_attention_status(hotplug_slot, &info->attention_status);
	150	get_latch_status(hotplug_slot, &info->latch_status);
	151	get_adapter_status(hotplug_slot, &info->adapter_status);
	152
5b1a960d	153	list_add(&slot->slot_list, &ctrl->slot_list);
1da177e4 LT	154	}
	155
	156	return 0;
1da177e4	157	error_info:
926030f6	158	kfree(info);
1da177e4	159	error_hpslot:
926030f6	160	kfree(hotplug_slot);
1da177e4	161	error_slot:
926030f6	162	kfree(slot);
1da177e4	163	error:
926030f6	164	return retval;
1da177e4 LT	165	}
1da177e4 LT	166
f7391f53	167	void cleanup_slots(struct controller *ctrl)
1da177e4	168	{
5b1a960d KK	169	struct list_head *tmp;
	170	struct list_head *next;
	171	struct slot *slot;
1da177e4	172
5b1a960d KK	173	list_for_each_safe(tmp, next, &ctrl->slot_list) {
	174	slot = list_entry(tmp, struct slot, slot_list);
	175	list_del(&slot->slot_list);
f7391f53	176	cancel_delayed_work(&slot->work);
a246fa4e	177	flush_scheduled_work();
f7391f53	178	flush_workqueue(shpchp_wq);
5b1a960d	179	pci_hp_deregister(slot->hotplug_slot);
1da177e4 LT	180	}
	181	}
	182
1da177e4 LT	183	/*
	184	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	185	*/
	186	static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
	187	{
8352e04e	188	struct slot *slot = get_slot(hotplug_slot);
1da177e4	189
be7bce25	190	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	191	__func__, slot_name(slot));
1da177e4 LT	192
	193	hotplug_slot->info->attention_status = status;
	194	slot->hpc_ops->set_attention_status(slot, status);
	195
	196	return 0;
	197	}
	198
1da177e4 LT	199	static int enable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	200	{
8352e04e	201	struct slot *slot = get_slot(hotplug_slot);
1da177e4	202
be7bce25	203	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	204	__func__, slot_name(slot));
1da177e4	205
a246fa4e	206	return shpchp_sysfs_enable_slot(slot);
1da177e4 LT	207	}
1da177e4 LT	208
1da177e4 LT	209	static int disable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	210	{
8352e04e	211	struct slot *slot = get_slot(hotplug_slot);
1da177e4	212
be7bce25	213	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	214	__func__, slot_name(slot));
1da177e4	215
a246fa4e	216	return shpchp_sysfs_disable_slot(slot);
1da177e4 LT	217	}
	218
	219	static int get_power_status (struct hotplug_slot hotplug_slot, u8 value)
	220	{
8352e04e	221	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	222	int retval;
1da177e4 LT	223
be7bce25	224	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	225	__func__, slot_name(slot));
1da177e4 LT	226
	227	retval = slot->hpc_ops->get_power_status(slot, value);
	228	if (retval < 0)
	229	*value = hotplug_slot->info->power_status;
	230
	231	return 0;
	232	}
	233
	234	static int get_attention_status (struct hotplug_slot hotplug_slot, u8 value)
	235	{
8352e04e	236	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	237	int retval;
1da177e4 LT	238
be7bce25	239	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	240	__func__, slot_name(slot));
1da177e4 LT	241
	242	retval = slot->hpc_ops->get_attention_status(slot, value);
	243	if (retval < 0)
	244	*value = hotplug_slot->info->attention_status;
	245
	246	return 0;
	247	}
	248
	249	static int get_latch_status (struct hotplug_slot hotplug_slot, u8 value)
	250	{
8352e04e	251	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	252	int retval;
1da177e4 LT	253
be7bce25	254	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	255	__func__, slot_name(slot));
1da177e4 LT	256
	257	retval = slot->hpc_ops->get_latch_status(slot, value);
	258	if (retval < 0)
	259	*value = hotplug_slot->info->latch_status;
	260
	261	return 0;
	262	}
	263
	264	static int get_adapter_status (struct hotplug_slot hotplug_slot, u8 value)
	265	{
8352e04e	266	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	267	int retval;
1da177e4 LT	268
be7bce25	269	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	270	__func__, slot_name(slot));
1da177e4 LT	271
	272	retval = slot->hpc_ops->get_adapter_status(slot, value);
	273	if (retval < 0)
	274	*value = hotplug_slot->info->adapter_status;
	275
	276	return 0;
	277	}
	278
1410dc1c RS	279	static int is_shpc_capable(struct pci_dev *dev)
1410dc1c RS	280	{
ac9c052d KK	281	if ((dev->vendor == PCI_VENDOR_ID_AMD) \|\| (dev->device ==
	282	PCI_DEVICE_ID_AMD_GOLAM_7450))
	283	return 1;
	284	if (!pci_find_capability(dev, PCI_CAP_ID_SHPC))
	285	return 0;
	286	if (get_hp_hw_control_from_firmware(dev))
	287	return 0;
	288	return 1;
1410dc1c RS	289	}
1410dc1c RS	290
1da177e4 LT	291	static int shpc_probe(struct pci_dev pdev, const struct pci_device_id ent)
	292	{
	293	int rc;
	294	struct controller *ctrl;
1da177e4	295
1410dc1c RS	296	if (!is_shpc_capable(pdev))
	297	return -ENODEV;
	298
57c95c0d	299	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
1da177e4	300	if (!ctrl) {
be7bce25	301	dev_err(&pdev->dev, "%s: Out of memory\n", __func__);
1da177e4 LT	302	goto err_out_none;
1da177e4 LT	303	}
5b1a960d	304	INIT_LIST_HEAD(&ctrl->slot_list);
1da177e4	305
ee138334	306	rc = shpc_init(ctrl, pdev);
1da177e4	307	if (rc) {
be7bce25	308	ctrl_dbg(ctrl, "Controller initialization failed\n");
1da177e4 LT	309	goto err_out_free_ctrl;
	310	}
	311
1da177e4 LT	312	pci_set_drvdata(pdev, ctrl);
1da177e4 LT	313
1da177e4 LT	314	/* Setup the slot information structures */
	315	rc = init_slots(ctrl);
	316	if (rc) {
be7bce25	317	ctrl_err(ctrl, "Slot initialization failed\n");
f7391f53	318	goto err_out_release_ctlr;
1da177e4 LT	319	}
1da177e4 LT	320
e1b95dc6 GKH	321	rc = shpchp_create_ctrl_files(ctrl);
	322	if (rc)
	323	goto err_cleanup_slots;
1da177e4 LT	324
	325	return 0;
	326
e1b95dc6 GKH	327	err_cleanup_slots:
e1b95dc6 GKH	328	cleanup_slots(ctrl);
f7391f53	329	err_out_release_ctlr:
1da177e4 LT	330	ctrl->hpc_ops->release_ctlr(ctrl);
	331	err_out_free_ctrl:
	332	kfree(ctrl);
	333	err_out_none:
	334	return -ENODEV;
	335	}
	336
e6b82b13	337	static void shpc_remove(struct pci_dev *dev)
1da177e4	338	{
e6b82b13	339	struct controller *ctrl = pci_get_drvdata(dev);
1da177e4	340
e6b82b13 KK	341	shpchp_remove_ctrl_files(ctrl);
	342	ctrl->hpc_ops->release_ctlr(ctrl);
	343	kfree(ctrl);
1da177e4 LT	344	}
1da177e4 LT	345
1da177e4	346	static struct pci_device_id shpcd_pci_tbl[] = {
dfcd5f68	347	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) \| 0x00), ~0)},
1da177e4 LT	348	{ /* end: all zeroes */ }
1da177e4 LT	349	};
1da177e4 LT	350	MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);
1da177e4 LT	351
1da177e4 LT	352	static struct pci_driver shpc_driver = {
	353	.name = SHPC_MODULE_NAME,
	354	.id_table = shpcd_pci_tbl,
	355	.probe = shpc_probe,
e6b82b13	356	.remove = shpc_remove,
1da177e4 LT	357	};
1da177e4 LT	358
1da177e4 LT	359	static int __init shpcd_init(void)
	360	{
	361	int retval = 0;
	362
424600f9	363	retval = pci_register_driver(&shpc_driver);
66bef8c0	364	dbg("%s: pci_register_driver = %d\n", __func__, retval);
424600f9	365	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1da177e4 LT	366	return retval;
	367	}
	368
	369	static void __exit shpcd_cleanup(void)
	370	{
	371	dbg("unload_shpchpd()\n");
1da177e4	372	pci_unregister_driver(&shpc_driver);
1da177e4 LT	373	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	374	}
	375
	376	module_init(shpcd_init);
	377	module_exit(shpcd_cleanup);