[GitHub/mt8127/android_kernel_alcatel_ttab.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/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 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 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,
	.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__, 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 get_max_bus_speed(struct hotplug_slot *hotplug_slot,
				enum pci_bus_speed *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_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 = get_slot(hotplug_slot);
	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 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>
1da177e4	34	#include <linux/pci.h>
f7391f53	35	#include <linux/workqueue.h>
1da177e4	36	#include "shpchp.h"
1da177e4 LT	37
	38	/* Global variables */
	39	int shpchp_debug;
	40	int shpchp_poll_mode;
	41	int shpchp_poll_time;
f7391f53	42	struct workqueue_struct *shpchp_wq;
1da177e4 LT	43
	44	#define DRIVER_VERSION "0.4"
	45	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	46	#define DRIVER_DESC "Standard Hot Plug PCI Controller Driver"
	47
	48	MODULE_AUTHOR(DRIVER_AUTHOR);
	49	MODULE_DESCRIPTION(DRIVER_DESC);
	50	MODULE_LICENSE("GPL");
	51
	52	module_param(shpchp_debug, bool, 0644);
	53	module_param(shpchp_poll_mode, bool, 0644);
	54	module_param(shpchp_poll_time, int, 0644);
	55	MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
	56	MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
	57	MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");
	58
	59	#define SHPC_MODULE_NAME "shpchp"
	60
1da177e4 LT	61	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	62	static int enable_slot (struct hotplug_slot *slot);
	63	static int disable_slot (struct hotplug_slot *slot);
	64	static int get_power_status (struct hotplug_slot slot, u8 value);
	65	static int get_attention_status (struct hotplug_slot slot, u8 value);
	66	static int get_latch_status (struct hotplug_slot slot, u8 value);
	67	static int get_adapter_status (struct hotplug_slot slot, u8 value);
	68	static int get_max_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	69	static int get_cur_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	70
	71	static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
1da177e4 LT	72	.set_attention_status = set_attention_status,
	73	.enable_slot = enable_slot,
	74	.disable_slot = disable_slot,
	75	.get_power_status = get_power_status,
	76	.get_attention_status = get_attention_status,
	77	.get_latch_status = get_latch_status,
	78	.get_adapter_status = get_adapter_status,
	79	.get_max_bus_speed = get_max_bus_speed,
	80	.get_cur_bus_speed = get_cur_bus_speed,
	81	};
	82
	83	/**
	84	* release_slot - free up the memory used by a slot
	85	* @hotplug_slot: slot to free
	86	*/
	87	static void release_slot(struct hotplug_slot *hotplug_slot)
	88	{
ee17fd93	89	struct slot *slot = hotplug_slot->private;
1da177e4	90
be7bce25	91	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	92	__func__, slot_name(slot));
1da177e4 LT	93
1da177e4 LT	94	kfree(slot->hotplug_slot->info);
1da177e4 LT	95	kfree(slot->hotplug_slot);
	96	kfree(slot);
	97	}
	98
	99	static int init_slots(struct controller *ctrl)
	100	{
926030f6 KK	101	struct slot *slot;
	102	struct hotplug_slot *hotplug_slot;
	103	struct hotplug_slot_info *info;
66f17055	104	char name[SLOT_NAME_SIZE];
926030f6	105	int retval = -ENOMEM;
5fe6cc60	106	int i;
926030f6 KK	107
926030f6 KK	108	for (i = 0; i < ctrl->num_slots; i++) {
57c95c0d	109	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
926030f6	110	if (!slot)
1da177e4 LT	111	goto error;
1da177e4 LT	112
57c95c0d	113	hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
926030f6	114	if (!hotplug_slot)
1da177e4	115	goto error_slot;
926030f6	116	slot->hotplug_slot = hotplug_slot;
1da177e4	117
57c95c0d	118	info = kzalloc(sizeof(*info), GFP_KERNEL);
926030f6	119	if (!info)
1da177e4	120	goto error_hpslot;
926030f6 KK	121	hotplug_slot->info = info;
926030f6 KK	122
926030f6	123	slot->hp_slot = i;
926030f6	124	slot->ctrl = ctrl;
227b84c7	125	slot->bus = ctrl->pci_dev->subordinate->number;
926030f6 KK	126	slot->device = ctrl->slot_device_offset + i;
926030f6 KK	127	slot->hpc_ops = ctrl->hpc_ops;
6f39be2e	128	slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);
a246fa4e	129	mutex_init(&slot->lock);
e325e1f0	130	INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);
1da177e4 LT	131
1da177e4 LT	132	/* register this slot with the hotplug pci core */
926030f6 KK	133	hotplug_slot->private = slot;
926030f6 KK	134	hotplug_slot->release = &release_slot;
66f17055	135	snprintf(name, SLOT_NAME_SIZE, "%d", slot->number);
926030f6 KK	136	hotplug_slot->ops = &shpchp_hotplug_slot_ops;
926030f6 KK	137
be7bce25 TI	138	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x "
	139	"hp_slot=%x sun=%x slot_device_offset=%x\n",
	140	pci_domain_nr(ctrl->pci_dev->subordinate),
	141	slot->bus, slot->device, slot->hp_slot, slot->number,
	142	ctrl->slot_device_offset);
f46753c5	143	retval = pci_hp_register(slot->hotplug_slot,
66f17055	144	ctrl->pci_dev->subordinate, slot->device, name);
926030f6	145	if (retval) {
f98ca311 TI	146	ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
f98ca311 TI	147	retval);
bbe779db	148	goto error_info;
1da177e4 LT	149	}
1da177e4 LT	150
66f17055 AC	151	get_power_status(hotplug_slot, &info->power_status);
	152	get_attention_status(hotplug_slot, &info->attention_status);
	153	get_latch_status(hotplug_slot, &info->latch_status);
	154	get_adapter_status(hotplug_slot, &info->adapter_status);
	155
5b1a960d	156	list_add(&slot->slot_list, &ctrl->slot_list);
1da177e4 LT	157	}
	158
	159	return 0;
1da177e4	160	error_info:
926030f6	161	kfree(info);
1da177e4	162	error_hpslot:
926030f6	163	kfree(hotplug_slot);
1da177e4	164	error_slot:
926030f6	165	kfree(slot);
1da177e4	166	error:
926030f6	167	return retval;
1da177e4 LT	168	}
1da177e4 LT	169
f7391f53	170	void cleanup_slots(struct controller *ctrl)
1da177e4	171	{
5b1a960d KK	172	struct list_head *tmp;
	173	struct list_head *next;
	174	struct slot *slot;
1da177e4	175
5b1a960d KK	176	list_for_each_safe(tmp, next, &ctrl->slot_list) {
	177	slot = list_entry(tmp, struct slot, slot_list);
	178	list_del(&slot->slot_list);
f7391f53	179	cancel_delayed_work(&slot->work);
a246fa4e	180	flush_scheduled_work();
f7391f53	181	flush_workqueue(shpchp_wq);
5b1a960d	182	pci_hp_deregister(slot->hotplug_slot);
1da177e4 LT	183	}
	184	}
	185
1da177e4 LT	186	/*
	187	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	188	*/
	189	static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
	190	{
8352e04e	191	struct slot *slot = get_slot(hotplug_slot);
1da177e4	192
be7bce25	193	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	194	__func__, slot_name(slot));
1da177e4 LT	195
	196	hotplug_slot->info->attention_status = status;
	197	slot->hpc_ops->set_attention_status(slot, status);
	198
	199	return 0;
	200	}
	201
1da177e4 LT	202	static int enable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	203	{
8352e04e	204	struct slot *slot = get_slot(hotplug_slot);
1da177e4	205
be7bce25	206	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	207	__func__, slot_name(slot));
1da177e4	208
a246fa4e	209	return shpchp_sysfs_enable_slot(slot);
1da177e4 LT	210	}
1da177e4 LT	211
1da177e4 LT	212	static int disable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	213	{
8352e04e	214	struct slot *slot = get_slot(hotplug_slot);
1da177e4	215
be7bce25	216	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	217	__func__, slot_name(slot));
1da177e4	218
a246fa4e	219	return shpchp_sysfs_disable_slot(slot);
1da177e4 LT	220	}
	221
	222	static int get_power_status (struct hotplug_slot hotplug_slot, u8 value)
	223	{
8352e04e	224	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	225	int retval;
1da177e4 LT	226
be7bce25	227	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	228	__func__, slot_name(slot));
1da177e4 LT	229
	230	retval = slot->hpc_ops->get_power_status(slot, value);
	231	if (retval < 0)
	232	*value = hotplug_slot->info->power_status;
	233
	234	return 0;
	235	}
	236
	237	static int get_attention_status (struct hotplug_slot hotplug_slot, u8 value)
	238	{
8352e04e	239	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	240	int retval;
1da177e4 LT	241
be7bce25	242	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	243	__func__, slot_name(slot));
1da177e4 LT	244
	245	retval = slot->hpc_ops->get_attention_status(slot, value);
	246	if (retval < 0)
	247	*value = hotplug_slot->info->attention_status;
	248
	249	return 0;
	250	}
	251
	252	static int get_latch_status (struct hotplug_slot hotplug_slot, u8 value)
	253	{
8352e04e	254	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	255	int retval;
1da177e4 LT	256
be7bce25	257	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	258	__func__, slot_name(slot));
1da177e4 LT	259
	260	retval = slot->hpc_ops->get_latch_status(slot, value);
	261	if (retval < 0)
	262	*value = hotplug_slot->info->latch_status;
	263
	264	return 0;
	265	}
	266
	267	static int get_adapter_status (struct hotplug_slot hotplug_slot, u8 value)
	268	{
8352e04e	269	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	270	int retval;
1da177e4 LT	271
be7bce25	272	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	273	__func__, slot_name(slot));
1da177e4 LT	274
	275	retval = slot->hpc_ops->get_adapter_status(slot, value);
	276	if (retval < 0)
	277	*value = hotplug_slot->info->adapter_status;
	278
	279	return 0;
	280	}
	281
f46753c5 AC	282	static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
f46753c5 AC	283	enum pci_bus_speed *value)
1da177e4	284	{
8352e04e	285	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	286	int retval;
1da177e4 LT	287
be7bce25	288	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	289	__func__, slot_name(slot));
dfcd5f68	290
1da177e4 LT	291	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
	292	if (retval < 0)
	293	*value = PCI_SPEED_UNKNOWN;
	294
	295	return 0;
	296	}
	297
	298	static int get_cur_bus_speed (struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	299	{
8352e04e	300	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	301	int retval;
1da177e4 LT	302
be7bce25	303	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
f98ca311	304	__func__, slot_name(slot));
dfcd5f68	305
1da177e4 LT	306	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
	307	if (retval < 0)
	308	*value = PCI_SPEED_UNKNOWN;
	309
	310	return 0;
	311	}
	312
1410dc1c RS	313	static int is_shpc_capable(struct pci_dev *dev)
1410dc1c RS	314	{
ac9c052d KK	315	if ((dev->vendor == PCI_VENDOR_ID_AMD) \|\| (dev->device ==
	316	PCI_DEVICE_ID_AMD_GOLAM_7450))
	317	return 1;
	318	if (!pci_find_capability(dev, PCI_CAP_ID_SHPC))
	319	return 0;
	320	if (get_hp_hw_control_from_firmware(dev))
	321	return 0;
	322	return 1;
1410dc1c RS	323	}
1410dc1c RS	324
1da177e4 LT	325	static int shpc_probe(struct pci_dev pdev, const struct pci_device_id ent)
	326	{
	327	int rc;
	328	struct controller *ctrl;
1da177e4	329
1410dc1c RS	330	if (!is_shpc_capable(pdev))
	331	return -ENODEV;
	332
57c95c0d	333	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
1da177e4	334	if (!ctrl) {
be7bce25	335	dev_err(&pdev->dev, "%s: Out of memory\n", __func__);
1da177e4 LT	336	goto err_out_none;
1da177e4 LT	337	}
5b1a960d	338	INIT_LIST_HEAD(&ctrl->slot_list);
1da177e4	339
ee138334	340	rc = shpc_init(ctrl, pdev);
1da177e4	341	if (rc) {
be7bce25	342	ctrl_dbg(ctrl, "Controller initialization failed\n");
1da177e4 LT	343	goto err_out_free_ctrl;
	344	}
	345
1da177e4 LT	346	pci_set_drvdata(pdev, ctrl);
1da177e4 LT	347
1da177e4 LT	348	/* Setup the slot information structures */
	349	rc = init_slots(ctrl);
	350	if (rc) {
be7bce25	351	ctrl_err(ctrl, "Slot initialization failed\n");
f7391f53	352	goto err_out_release_ctlr;
1da177e4 LT	353	}
1da177e4 LT	354
e1b95dc6 GKH	355	rc = shpchp_create_ctrl_files(ctrl);
	356	if (rc)
	357	goto err_cleanup_slots;
1da177e4 LT	358
	359	return 0;
	360
e1b95dc6 GKH	361	err_cleanup_slots:
e1b95dc6 GKH	362	cleanup_slots(ctrl);
f7391f53	363	err_out_release_ctlr:
1da177e4 LT	364	ctrl->hpc_ops->release_ctlr(ctrl);
	365	err_out_free_ctrl:
	366	kfree(ctrl);
	367	err_out_none:
	368	return -ENODEV;
	369	}
	370
e6b82b13	371	static void shpc_remove(struct pci_dev *dev)
1da177e4	372	{
e6b82b13	373	struct controller *ctrl = pci_get_drvdata(dev);
1da177e4	374
e6b82b13 KK	375	shpchp_remove_ctrl_files(ctrl);
	376	ctrl->hpc_ops->release_ctlr(ctrl);
	377	kfree(ctrl);
1da177e4 LT	378	}
1da177e4 LT	379
1da177e4	380	static struct pci_device_id shpcd_pci_tbl[] = {
dfcd5f68	381	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) \| 0x00), ~0)},
1da177e4 LT	382	{ /* end: all zeroes */ }
1da177e4 LT	383	};
1da177e4 LT	384	MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);
1da177e4 LT	385
1da177e4 LT	386	static struct pci_driver shpc_driver = {
	387	.name = SHPC_MODULE_NAME,
	388	.id_table = shpcd_pci_tbl,
	389	.probe = shpc_probe,
e6b82b13	390	.remove = shpc_remove,
1da177e4 LT	391	};
1da177e4 LT	392
1da177e4 LT	393	static int __init shpcd_init(void)
	394	{
	395	int retval = 0;
	396
424600f9	397	retval = pci_register_driver(&shpc_driver);
66bef8c0	398	dbg("%s: pci_register_driver = %d\n", __func__, retval);
424600f9	399	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1da177e4 LT	400	return retval;
	401	}
	402
	403	static void __exit shpcd_cleanup(void)
	404	{
	405	dbg("unload_shpchpd()\n");
1da177e4	406	pci_unregister_driver(&shpc_driver);
1da177e4 LT	407	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	408	}
	409
	410	module_init(shpcd_init);
	411	module_exit(shpcd_cleanup);