[deliverable/linux.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 "shpchp.h"

/* Global variables */
bool shpchp_debug;
bool shpchp_poll_mode;
int shpchp_poll_time;

#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;
	int i;

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

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

		info = kzalloc(sizeof(*info), GFP_KERNEL);
		if (!info) {
			retval = -ENOMEM;
			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);

		slot->wq = alloc_workqueue("shpchp-%d", 0, 0, slot->number);
		if (!slot->wq) {
			retval = -ENOMEM;
			goto error_info;
		}

		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_slotwq;
		}

		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_slotwq:
	destroy_workqueue(slot->wq);
error_info:
	kfree(info);
error_hpslot:
	kfree(hotplug_slot);
error_slot:
	kfree(slot);
error:
	return retval;
}

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

	list_for_each_entry_safe(slot, next, &ctrl->slot_list, slot_list) {
		list_del(&slot->slot_list);
		cancel_delayed_work(&slot->work);
		destroy_workqueue(slot->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;

	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>
1da177e4	36	#include "shpchp.h"
1da177e4 LT	37
1da177e4 LT	38	/* Global variables */
90ab5ee9 RR	39	bool shpchp_debug;
90ab5ee9 RR	40	bool shpchp_poll_mode;
1da177e4	41	int shpchp_poll_time;
1da177e4 LT	42
	43	#define DRIVER_VERSION "0.4"
	44	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	45	#define DRIVER_DESC "Standard Hot Plug PCI Controller Driver"
	46
	47	MODULE_AUTHOR(DRIVER_AUTHOR);
	48	MODULE_DESCRIPTION(DRIVER_DESC);
	49	MODULE_LICENSE("GPL");
	50
	51	module_param(shpchp_debug, bool, 0644);
	52	module_param(shpchp_poll_mode, bool, 0644);
	53	module_param(shpchp_poll_time, int, 0644);
	54	MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
	55	MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
	56	MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");
	57
	58	#define SHPC_MODULE_NAME "shpchp"
	59
ff3ce480 BS	60	static int set_attention_status(struct hotplug_slot *slot, u8 value);
	61	static int enable_slot(struct hotplug_slot *slot);
	62	static int disable_slot(struct hotplug_slot *slot);
	63	static int get_power_status(struct hotplug_slot slot, u8 value);
	64	static int get_attention_status(struct hotplug_slot slot, u8 value);
	65	static int get_latch_status(struct hotplug_slot slot, u8 value);
	66	static int get_adapter_status(struct hotplug_slot slot, u8 value);
1da177e4 LT	67
1da177e4 LT	68	static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
1da177e4 LT	69	.set_attention_status = set_attention_status,
	70	.enable_slot = enable_slot,
	71	.disable_slot = disable_slot,
	72	.get_power_status = get_power_status,
	73	.get_attention_status = get_attention_status,
	74	.get_latch_status = get_latch_status,
	75	.get_adapter_status = get_adapter_status,
1da177e4 LT	76	};
	77
	78	/**
	79	* release_slot - free up the memory used by a slot
	80	* @hotplug_slot: slot to free
	81	*/
	82	static void release_slot(struct hotplug_slot *hotplug_slot)
	83	{
ee17fd93	84	struct slot *slot = hotplug_slot->private;
1da177e4	85
be7bce25	86	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	87	__func__, slot_name(slot));
1da177e4 LT	88
1da177e4 LT	89	kfree(slot->hotplug_slot->info);
1da177e4 LT	90	kfree(slot->hotplug_slot);
	91	kfree(slot);
	92	}
	93
	94	static int init_slots(struct controller *ctrl)
	95	{
926030f6 KK	96	struct slot *slot;
	97	struct hotplug_slot *hotplug_slot;
	98	struct hotplug_slot_info *info;
66f17055	99	char name[SLOT_NAME_SIZE];
83d05710	100	int retval;
5fe6cc60	101	int i;
926030f6 KK	102
926030f6 KK	103	for (i = 0; i < ctrl->num_slots; i++) {
57c95c0d	104	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
83d05710 JL	105	if (!slot) {
83d05710 JL	106	retval = -ENOMEM;
1da177e4	107	goto error;
83d05710	108	}
1da177e4	109
57c95c0d	110	hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
83d05710 JL	111	if (!hotplug_slot) {
83d05710 JL	112	retval = -ENOMEM;
1da177e4	113	goto error_slot;
83d05710	114	}
926030f6	115	slot->hotplug_slot = hotplug_slot;
1da177e4	116
57c95c0d	117	info = kzalloc(sizeof(*info), GFP_KERNEL);
83d05710 JL	118	if (!info) {
83d05710 JL	119	retval = -ENOMEM;
1da177e4	120	goto error_hpslot;
83d05710	121	}
926030f6 KK	122	hotplug_slot->info = info;
926030f6 KK	123
926030f6	124	slot->hp_slot = i;
926030f6	125	slot->ctrl = ctrl;
227b84c7	126	slot->bus = ctrl->pci_dev->subordinate->number;
926030f6 KK	127	slot->device = ctrl->slot_device_offset + i;
926030f6 KK	128	slot->hpc_ops = ctrl->hpc_ops;
6f39be2e	129	slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);
f652e7d2	130
d8537548	131	slot->wq = alloc_workqueue("shpchp-%d", 0, 0, slot->number);
f652e7d2 BH	132	if (!slot->wq) {
	133	retval = -ENOMEM;
	134	goto error_info;
	135	}
	136
a246fa4e	137	mutex_init(&slot->lock);
e325e1f0	138	INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);
1da177e4 LT	139
1da177e4 LT	140	/* register this slot with the hotplug pci core */
926030f6 KK	141	hotplug_slot->private = slot;
926030f6 KK	142	hotplug_slot->release = &release_slot;
66f17055	143	snprintf(name, SLOT_NAME_SIZE, "%d", slot->number);
926030f6 KK	144	hotplug_slot->ops = &shpchp_hotplug_slot_ops;
926030f6 KK	145
227f0647	146	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x hp_slot=%x sun=%x slot_device_offset=%x\n",
f7625980 BH	147	pci_domain_nr(ctrl->pci_dev->subordinate),
	148	slot->bus, slot->device, slot->hp_slot, slot->number,
	149	ctrl->slot_device_offset);
f46753c5	150	retval = pci_hp_register(slot->hotplug_slot,
66f17055	151	ctrl->pci_dev->subordinate, slot->device, name);
926030f6	152	if (retval) {
f98ca311 TI	153	ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
f98ca311 TI	154	retval);
f652e7d2	155	goto error_slotwq;
1da177e4 LT	156	}
1da177e4 LT	157
66f17055 AC	158	get_power_status(hotplug_slot, &info->power_status);
	159	get_attention_status(hotplug_slot, &info->attention_status);
	160	get_latch_status(hotplug_slot, &info->latch_status);
	161	get_adapter_status(hotplug_slot, &info->adapter_status);
	162
5b1a960d	163	list_add(&slot->slot_list, &ctrl->slot_list);
1da177e4 LT	164	}
	165
	166	return 0;
f652e7d2 BH	167	error_slotwq:
f652e7d2 BH	168	destroy_workqueue(slot->wq);
1da177e4	169	error_info:
926030f6	170	kfree(info);
1da177e4	171	error_hpslot:
926030f6	172	kfree(hotplug_slot);
1da177e4	173	error_slot:
926030f6	174	kfree(slot);
1da177e4	175	error:
926030f6	176	return retval;
1da177e4 LT	177	}
1da177e4 LT	178
f7391f53	179	void cleanup_slots(struct controller *ctrl)
1da177e4	180	{
2ac83ccc	181	struct slot slot, next;
1da177e4	182
2ac83ccc	183	list_for_each_entry_safe(slot, next, &ctrl->slot_list, slot_list) {
5b1a960d	184	list_del(&slot->slot_list);
f7391f53	185	cancel_delayed_work(&slot->work);
f652e7d2	186	destroy_workqueue(slot->wq);
5b1a960d	187	pci_hp_deregister(slot->hotplug_slot);
1da177e4 LT	188	}
	189	}
	190
1da177e4 LT	191	/*
	192	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	193	*/
ff3ce480	194	static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
1da177e4	195	{
8352e04e	196	struct slot *slot = get_slot(hotplug_slot);
1da177e4	197
be7bce25	198	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	199	__func__, slot_name(slot));
1da177e4 LT	200
	201	hotplug_slot->info->attention_status = status;
	202	slot->hpc_ops->set_attention_status(slot, status);
	203
	204	return 0;
	205	}
	206
ff3ce480	207	static int enable_slot(struct hotplug_slot *hotplug_slot)
1da177e4	208	{
8352e04e	209	struct slot *slot = get_slot(hotplug_slot);
1da177e4	210
be7bce25	211	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	212	__func__, slot_name(slot));
1da177e4	213
a246fa4e	214	return shpchp_sysfs_enable_slot(slot);
1da177e4 LT	215	}
1da177e4 LT	216
ff3ce480	217	static int disable_slot(struct hotplug_slot *hotplug_slot)
1da177e4	218	{
8352e04e	219	struct slot *slot = get_slot(hotplug_slot);
1da177e4	220
be7bce25	221	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	222	__func__, slot_name(slot));
1da177e4	223
a246fa4e	224	return shpchp_sysfs_disable_slot(slot);
1da177e4 LT	225	}
1da177e4 LT	226
ff3ce480	227	static int get_power_status(struct hotplug_slot hotplug_slot, u8 value)
1da177e4	228	{
8352e04e	229	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	230	int retval;
1da177e4 LT	231
be7bce25	232	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	233	__func__, slot_name(slot));
1da177e4 LT	234
	235	retval = slot->hpc_ops->get_power_status(slot, value);
	236	if (retval < 0)
	237	*value = hotplug_slot->info->power_status;
	238
	239	return 0;
	240	}
	241
ff3ce480	242	static int get_attention_status(struct hotplug_slot hotplug_slot, u8 value)
1da177e4	243	{
8352e04e	244	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	245	int retval;
1da177e4 LT	246
be7bce25	247	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	248	__func__, slot_name(slot));
1da177e4 LT	249
	250	retval = slot->hpc_ops->get_attention_status(slot, value);
	251	if (retval < 0)
	252	*value = hotplug_slot->info->attention_status;
	253
	254	return 0;
	255	}
	256
ff3ce480	257	static int get_latch_status(struct hotplug_slot hotplug_slot, u8 value)
1da177e4	258	{
8352e04e	259	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	260	int retval;
1da177e4 LT	261
be7bce25	262	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	263	__func__, slot_name(slot));
1da177e4 LT	264
	265	retval = slot->hpc_ops->get_latch_status(slot, value);
	266	if (retval < 0)
	267	*value = hotplug_slot->info->latch_status;
	268
	269	return 0;
	270	}
	271
ff3ce480	272	static int get_adapter_status(struct hotplug_slot hotplug_slot, u8 value)
1da177e4	273	{
8352e04e	274	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	275	int retval;
1da177e4 LT	276
be7bce25	277	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	278	__func__, slot_name(slot));
1da177e4 LT	279
	280	retval = slot->hpc_ops->get_adapter_status(slot, value);
	281	if (retval < 0)
	282	*value = hotplug_slot->info->adapter_status;
	283
	284	return 0;
	285	}
	286
1410dc1c	287	static int is_shpc_capable(struct pci_dev *dev)
1410dc1c	288	{
4cac2eb1 BH	289	if (dev->vendor == PCI_VENDOR_ID_AMD &&
4cac2eb1 BH	290	dev->device == PCI_DEVICE_ID_AMD_GOLAM_7450)
ac9c052d KK	291	return 1;
	292	if (!pci_find_capability(dev, PCI_CAP_ID_SHPC))
	293	return 0;
	294	if (get_hp_hw_control_from_firmware(dev))
	295	return 0;
	296	return 1;
1410dc1c	297	}
1410dc1c	298
1da177e4 LT	299	static int shpc_probe(struct pci_dev pdev, const struct pci_device_id ent)
	300	{
	301	int rc;
	302	struct controller *ctrl;
1da177e4	303
1410dc1c	304	if (!is_shpc_capable(pdev))
	305	return -ENODEV;
	306
57c95c0d	307	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
1da177e4	308	if (!ctrl) {
be7bce25	309	dev_err(&pdev->dev, "%s: Out of memory\n", __func__);
1da177e4 LT	310	goto err_out_none;
1da177e4 LT	311	}
5b1a960d	312	INIT_LIST_HEAD(&ctrl->slot_list);
1da177e4	313
ee138334	314	rc = shpc_init(ctrl, pdev);
1da177e4	315	if (rc) {
be7bce25	316	ctrl_dbg(ctrl, "Controller initialization failed\n");
1da177e4 LT	317	goto err_out_free_ctrl;
	318	}
	319
1da177e4 LT	320	pci_set_drvdata(pdev, ctrl);
1da177e4 LT	321
1da177e4 LT	322	/* Setup the slot information structures */
	323	rc = init_slots(ctrl);
	324	if (rc) {
be7bce25	325	ctrl_err(ctrl, "Slot initialization failed\n");
f7391f53	326	goto err_out_release_ctlr;
1da177e4 LT	327	}
1da177e4 LT	328
e1b95dc6 GKH	329	rc = shpchp_create_ctrl_files(ctrl);
	330	if (rc)
	331	goto err_cleanup_slots;
1da177e4 LT	332
	333	return 0;
	334
e1b95dc6 GKH	335	err_cleanup_slots:
e1b95dc6 GKH	336	cleanup_slots(ctrl);
f7391f53	337	err_out_release_ctlr:
1da177e4 LT	338	ctrl->hpc_ops->release_ctlr(ctrl);
	339	err_out_free_ctrl:
	340	kfree(ctrl);
	341	err_out_none:
	342	return -ENODEV;
	343	}
	344
e6b82b13	345	static void shpc_remove(struct pci_dev *dev)
1da177e4	346	{
e6b82b13	347	struct controller *ctrl = pci_get_drvdata(dev);
1da177e4	348
e6b82b13 KK	349	shpchp_remove_ctrl_files(ctrl);
	350	ctrl->hpc_ops->release_ctlr(ctrl);
	351	kfree(ctrl);
1da177e4 LT	352	}
1da177e4 LT	353
1da177e4	354	static struct pci_device_id shpcd_pci_tbl[] = {
dfcd5f68	355	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) \| 0x00), ~0)},
1da177e4 LT	356	{ /* end: all zeroes */ }
1da177e4 LT	357	};
1da177e4 LT	358	MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);
1da177e4 LT	359
1da177e4 LT	360	static struct pci_driver shpc_driver = {
	361	.name = SHPC_MODULE_NAME,
	362	.id_table = shpcd_pci_tbl,
	363	.probe = shpc_probe,
e6b82b13	364	.remove = shpc_remove,
1da177e4 LT	365	};
1da177e4 LT	366
1da177e4 LT	367	static int __init shpcd_init(void)
1da177e4 LT	368	{
f652e7d2	369	int retval;
e24dcbef	370
424600f9	371	retval = pci_register_driver(&shpc_driver);
66bef8c0	372	dbg("%s: pci_register_driver = %d\n", __func__, retval);
424600f9	373	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
f652e7d2	374
1da177e4 LT	375	return retval;
	376	}
	377
	378	static void __exit shpcd_cleanup(void)
	379	{
	380	dbg("unload_shpchpd()\n");
1da177e4	381	pci_unregister_driver(&shpc_driver);
1da177e4 LT	382	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	383	}
	384
	385	module_init(shpcd_init);
	386	module_exit(shpcd_cleanup);