[linux-2.6-block.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 = {
	.owner =		THIS_MODULE,
	.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;

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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;
	int retval = -ENOMEM;
	int i, len, dup = 1;

	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;

		hotplug_slot->name = slot->name;

		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(slot->name, SLOT_NAME_SIZE, "%d", slot->number);
		hotplug_slot->ops = &shpchp_hotplug_slot_ops;

		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);

		dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x "
		    "slot_device_offset=%x\n", slot->bus, slot->device,
		    slot->hp_slot, slot->number, ctrl->slot_device_offset);
duplicate_name:
		retval = pci_hp_register(slot->hotplug_slot,
				ctrl->pci_dev->subordinate, slot->device);
		if (retval) {
			/*
			 * If slot N already exists, we'll try to create
			 * slot N-1, N-2 ... N-M, until we overflow.
			 */
			if (retval == -EEXIST) {
				len = snprintf(slot->name, SLOT_NAME_SIZE,
					       "%d-%d", slot->number, dup++);
				if (len < SLOT_NAME_SIZE)
					goto duplicate_name;
				else
					err("duplicate slot name overflow\n");
			}
			err("pci_hp_register failed with error %d\n", retval);
			goto error_info;
		}

		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);

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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);

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	return shpchp_sysfs_enable_slot(slot);
}

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

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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;

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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;

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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;

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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;

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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;

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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;

	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);

	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) {
		err("%s : out of memory\n", __func__);
		goto err_out_none;
	}
	INIT_LIST_HEAD(&ctrl->slot_list);

	rc = shpc_init(ctrl, pdev);
	if (rc) {
		dbg("%s: controller initialization failed\n",
		    SHPC_MODULE_NAME);
		goto err_out_free_ctrl;
	}

	pci_set_drvdata(pdev, ctrl);

	/* Setup the slot information structures */
	rc = init_slots(ctrl);
	if (rc) {
		err("%s: slot initialization failed\n", SHPC_MODULE_NAME);
		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 = {
	72	.owner = THIS_MODULE,
	73	.set_attention_status = set_attention_status,
	74	.enable_slot = enable_slot,
	75	.disable_slot = disable_slot,
	76	.get_power_status = get_power_status,
	77	.get_attention_status = get_attention_status,
	78	.get_latch_status = get_latch_status,
	79	.get_adapter_status = get_adapter_status,
	80	.get_max_bus_speed = get_max_bus_speed,
	81	.get_cur_bus_speed = get_cur_bus_speed,
	82	};
	83
	84	/**
	85	* release_slot - free up the memory used by a slot
	86	* @hotplug_slot: slot to free
	87	*/
	88	static void release_slot(struct hotplug_slot *hotplug_slot)
	89	{
ee17fd93	90	struct slot *slot = hotplug_slot->private;
1da177e4	91
66bef8c0	92	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
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;
926030f6	104	int retval = -ENOMEM;
d6a9e9b4	105	int i, len, dup = 1;
926030f6 KK	106
926030f6 KK	107	for (i = 0; i < ctrl->num_slots; i++) {
57c95c0d	108	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
926030f6	109	if (!slot)
1da177e4 LT	110	goto error;
1da177e4 LT	111
57c95c0d	112	hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
926030f6	113	if (!hotplug_slot)
1da177e4	114	goto error_slot;
926030f6	115	slot->hotplug_slot = hotplug_slot;
1da177e4	116
57c95c0d	117	info = kzalloc(sizeof(*info), GFP_KERNEL);
926030f6	118	if (!info)
1da177e4	119	goto error_hpslot;
926030f6 KK	120	hotplug_slot->info = info;
926030f6 KK	121
bbe779db	122	hotplug_slot->name = slot->name;
1da177e4	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);
a246fa4e	130	mutex_init(&slot->lock);
e325e1f0	131	INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);
1da177e4 LT	132
1da177e4 LT	133	/* register this slot with the hotplug pci core */
926030f6 KK	134	hotplug_slot->private = slot;
926030f6 KK	135	hotplug_slot->release = &release_slot;
d6a9e9b4	136	snprintf(slot->name, SLOT_NAME_SIZE, "%d", slot->number);
926030f6 KK	137	hotplug_slot->ops = &shpchp_hotplug_slot_ops;
	138
	139	get_power_status(hotplug_slot, &info->power_status);
	140	get_attention_status(hotplug_slot, &info->attention_status);
	141	get_latch_status(hotplug_slot, &info->latch_status);
	142	get_adapter_status(hotplug_slot, &info->adapter_status);
	143
	144	dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x "
	145	"slot_device_offset=%x\n", slot->bus, slot->device,
	146	slot->hp_slot, slot->number, ctrl->slot_device_offset);
d6a9e9b4	147	duplicate_name:
f46753c5 AC	148	retval = pci_hp_register(slot->hotplug_slot,
f46753c5 AC	149	ctrl->pci_dev->subordinate, slot->device);
926030f6	150	if (retval) {
d6a9e9b4 AC	151	/*
	152	* If slot N already exists, we'll try to create
	153	* slot N-1, N-2 ... N-M, until we overflow.
	154	*/
	155	if (retval == -EEXIST) {
	156	len = snprintf(slot->name, SLOT_NAME_SIZE,
	157	"%d-%d", slot->number, dup++);
	158	if (len < SLOT_NAME_SIZE)
	159	goto duplicate_name;
	160	else
	161	err("duplicate slot name overflow\n");
	162	}
926030f6	163	err("pci_hp_register failed with error %d\n", retval);
bbe779db	164	goto error_info;
1da177e4 LT	165	}
1da177e4 LT	166
5b1a960d	167	list_add(&slot->slot_list, &ctrl->slot_list);
1da177e4 LT	168	}
	169
	170	return 0;
1da177e4	171	error_info:
926030f6	172	kfree(info);
1da177e4	173	error_hpslot:
926030f6	174	kfree(hotplug_slot);
1da177e4	175	error_slot:
926030f6	176	kfree(slot);
1da177e4	177	error:
926030f6	178	return retval;
1da177e4 LT	179	}
1da177e4 LT	180
f7391f53	181	void cleanup_slots(struct controller *ctrl)
1da177e4	182	{
5b1a960d KK	183	struct list_head *tmp;
	184	struct list_head *next;
	185	struct slot *slot;
1da177e4	186
5b1a960d KK	187	list_for_each_safe(tmp, next, &ctrl->slot_list) {
	188	slot = list_entry(tmp, struct slot, slot_list);
	189	list_del(&slot->slot_list);
f7391f53	190	cancel_delayed_work(&slot->work);
a246fa4e	191	flush_scheduled_work();
f7391f53	192	flush_workqueue(shpchp_wq);
5b1a960d	193	pci_hp_deregister(slot->hotplug_slot);
1da177e4 LT	194	}
	195	}
	196
1da177e4 LT	197	/*
	198	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	199	*/
	200	static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
	201	{
8352e04e	202	struct slot *slot = get_slot(hotplug_slot);
1da177e4	203
66bef8c0	204	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
1da177e4 LT	205
	206	hotplug_slot->info->attention_status = status;
	207	slot->hpc_ops->set_attention_status(slot, status);
	208
	209	return 0;
	210	}
	211
1da177e4 LT	212	static int enable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	213	{
8352e04e	214	struct slot *slot = get_slot(hotplug_slot);
1da177e4	215
66bef8c0	216	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
1da177e4	217
a246fa4e	218	return shpchp_sysfs_enable_slot(slot);
1da177e4 LT	219	}
1da177e4 LT	220
1da177e4 LT	221	static int disable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	222	{
8352e04e	223	struct slot *slot = get_slot(hotplug_slot);
1da177e4	224
66bef8c0	225	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
1da177e4	226
a246fa4e	227	return shpchp_sysfs_disable_slot(slot);
1da177e4 LT	228	}
	229
	230	static int get_power_status (struct hotplug_slot hotplug_slot, u8 value)
	231	{
8352e04e	232	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	233	int retval;
1da177e4 LT	234
66bef8c0	235	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
1da177e4 LT	236
	237	retval = slot->hpc_ops->get_power_status(slot, value);
	238	if (retval < 0)
	239	*value = hotplug_slot->info->power_status;
	240
	241	return 0;
	242	}
	243
	244	static int get_attention_status (struct hotplug_slot hotplug_slot, u8 value)
	245	{
8352e04e	246	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	247	int retval;
1da177e4 LT	248
66bef8c0	249	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
1da177e4 LT	250
	251	retval = slot->hpc_ops->get_attention_status(slot, value);
	252	if (retval < 0)
	253	*value = hotplug_slot->info->attention_status;
	254
	255	return 0;
	256	}
	257
	258	static int get_latch_status (struct hotplug_slot hotplug_slot, u8 value)
	259	{
8352e04e	260	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	261	int retval;
1da177e4 LT	262
66bef8c0	263	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
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
	272	static int get_adapter_status (struct hotplug_slot hotplug_slot, u8 value)
	273	{
8352e04e	274	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	275	int retval;
1da177e4 LT	276
66bef8c0	277	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
1da177e4 LT	278
	279	retval = slot->hpc_ops->get_adapter_status(slot, value);
	280	if (retval < 0)
	281	*value = hotplug_slot->info->adapter_status;
	282
	283	return 0;
	284	}
	285
f46753c5 AC	286	static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
f46753c5 AC	287	enum pci_bus_speed *value)
1da177e4	288	{
8352e04e	289	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	290	int retval;
1da177e4 LT	291
66bef8c0	292	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
dfcd5f68	293
1da177e4 LT	294	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
	295	if (retval < 0)
	296	*value = PCI_SPEED_UNKNOWN;
	297
	298	return 0;
	299	}
	300
	301	static int get_cur_bus_speed (struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	302	{
8352e04e	303	struct slot *slot = get_slot(hotplug_slot);
1da177e4 LT	304	int retval;
1da177e4 LT	305
66bef8c0	306	dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
dfcd5f68	307
1da177e4 LT	308	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
	309	if (retval < 0)
	310	*value = PCI_SPEED_UNKNOWN;
	311
	312	return 0;
	313	}
	314
1410dc1c	315	static int is_shpc_capable(struct pci_dev *dev)
1410dc1c	316	{
ac9c052d KK	317	if ((dev->vendor == PCI_VENDOR_ID_AMD) \|\| (dev->device ==
	318	PCI_DEVICE_ID_AMD_GOLAM_7450))
	319	return 1;
	320	if (!pci_find_capability(dev, PCI_CAP_ID_SHPC))
	321	return 0;
	322	if (get_hp_hw_control_from_firmware(dev))
	323	return 0;
	324	return 1;
1410dc1c	325	}
1410dc1c	326
1da177e4 LT	327	static int shpc_probe(struct pci_dev pdev, const struct pci_device_id ent)
	328	{
	329	int rc;
	330	struct controller *ctrl;
1da177e4	331
1410dc1c	332	if (!is_shpc_capable(pdev))
	333	return -ENODEV;
	334
57c95c0d	335	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
1da177e4	336	if (!ctrl) {
66bef8c0	337	err("%s : out of memory\n", __func__);
1da177e4 LT	338	goto err_out_none;
1da177e4 LT	339	}
5b1a960d	340	INIT_LIST_HEAD(&ctrl->slot_list);
1da177e4	341
ee138334	342	rc = shpc_init(ctrl, pdev);
1da177e4	343	if (rc) {
dfcd5f68 KK	344	dbg("%s: controller initialization failed\n",
dfcd5f68 KK	345	SHPC_MODULE_NAME);
1da177e4 LT	346	goto err_out_free_ctrl;
	347	}
	348
1da177e4 LT	349	pci_set_drvdata(pdev, ctrl);
1da177e4 LT	350
1da177e4 LT	351	/* Setup the slot information structures */
	352	rc = init_slots(ctrl);
	353	if (rc) {
8352e04e	354	err("%s: slot initialization failed\n", SHPC_MODULE_NAME);
f7391f53	355	goto err_out_release_ctlr;
1da177e4 LT	356	}
1da177e4 LT	357
e1b95dc6 GKH	358	rc = shpchp_create_ctrl_files(ctrl);
	359	if (rc)
	360	goto err_cleanup_slots;
1da177e4 LT	361
	362	return 0;
	363
e1b95dc6 GKH	364	err_cleanup_slots:
e1b95dc6 GKH	365	cleanup_slots(ctrl);
f7391f53	366	err_out_release_ctlr:
1da177e4 LT	367	ctrl->hpc_ops->release_ctlr(ctrl);
	368	err_out_free_ctrl:
	369	kfree(ctrl);
	370	err_out_none:
	371	return -ENODEV;
	372	}
	373
e6b82b13	374	static void shpc_remove(struct pci_dev *dev)
1da177e4	375	{
e6b82b13	376	struct controller *ctrl = pci_get_drvdata(dev);
1da177e4	377
e6b82b13 KK	378	shpchp_remove_ctrl_files(ctrl);
	379	ctrl->hpc_ops->release_ctlr(ctrl);
	380	kfree(ctrl);
1da177e4 LT	381	}
1da177e4 LT	382
1da177e4	383	static struct pci_device_id shpcd_pci_tbl[] = {
dfcd5f68	384	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) \| 0x00), ~0)},
1da177e4 LT	385	{ /* end: all zeroes */ }
1da177e4 LT	386	};
1da177e4 LT	387	MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);
1da177e4 LT	388
1da177e4 LT	389	static struct pci_driver shpc_driver = {
	390	.name = SHPC_MODULE_NAME,
	391	.id_table = shpcd_pci_tbl,
	392	.probe = shpc_probe,
e6b82b13	393	.remove = shpc_remove,
1da177e4 LT	394	};
1da177e4 LT	395
1da177e4 LT	396	static int __init shpcd_init(void)
	397	{
	398	int retval = 0;
	399
424600f9	400	retval = pci_register_driver(&shpc_driver);
66bef8c0	401	dbg("%s: pci_register_driver = %d\n", __func__, retval);
424600f9	402	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1da177e4 LT	403	return retval;
	404	}
	405
	406	static void __exit shpcd_cleanup(void)
	407	{
	408	dbg("unload_shpchpd()\n");
1da177e4	409	pci_unregister_driver(&shpc_driver);
1da177e4 LT	410	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	411	}
	412
	413	module_init(shpcd_init);
	414	module_exit(shpcd_cleanup);