[linux-2.6-block.git] / drivers / usb / wusbcore / wusbhc.c

/*
 * Wireless USB Host Controller
 * sysfs glue, wusbcore module support and life cycle management
 *
 *
 * Copyright (C) 2005-2006 Intel Corporation
 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * 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.  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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 *
 * Creation/destruction of wusbhc is split in two parts; that that
 * doesn't require the HCD to be added (wusbhc_{create,destroy}) and
 * the one that requires (phase B, wusbhc_b_{create,destroy}).
 *
 * This is so because usb_add_hcd() will start the HC, and thus, all
 * the HC specific stuff has to be already initialiazed (like sysfs
 * thingies).
 */
#include <linux/device.h>
#include <linux/module.h>
#include "wusbhc.h"

/**
 * Extract the wusbhc that corresponds to a USB Host Controller class device
 *
 * WARNING! Apply only if @dev is that of a
 *          wusbhc.usb_hcd.self->class_dev; otherwise, you loose.
 */
static struct wusbhc *usbhc_dev_to_wusbhc(struct device *dev)
{
	struct usb_bus *usb_bus = dev_get_drvdata(dev);
	struct usb_hcd *usb_hcd = bus_to_hcd(usb_bus);
	return usb_hcd_to_wusbhc(usb_hcd);
}

/*
 * Show & store the current WUSB trust timeout
 *
 * We don't do locking--it is an 'atomic' value.
 *
 * The units that we store/show are always MILLISECONDS. However, the
 * value of trust_timeout is jiffies.
 */
static ssize_t wusb_trust_timeout_show(struct device *dev,
				       struct device_attribute *attr, char *buf)
{
	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);

	return scnprintf(buf, PAGE_SIZE, "%u\n", wusbhc->trust_timeout);
}

static ssize_t wusb_trust_timeout_store(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t size)
{
	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	ssize_t result = -ENOSYS;
	unsigned trust_timeout;

	result = sscanf(buf, "%u", &trust_timeout);
	if (result != 1) {
		result = -EINVAL;
		goto out;
	}
	/* FIXME: maybe we should check for range validity? */
	wusbhc->trust_timeout = trust_timeout;
	cancel_delayed_work(&wusbhc->keep_alive_timer);
	flush_workqueue(wusbd);
	queue_delayed_work(wusbd, &wusbhc->keep_alive_timer,
			   (trust_timeout * CONFIG_HZ)/1000/2);
out:
	return result < 0 ? result : size;
}
static DEVICE_ATTR(wusb_trust_timeout, 0644, wusb_trust_timeout_show,
					     wusb_trust_timeout_store);

/*
 * Show the current WUSB CHID.
 */
static ssize_t wusb_chid_show(struct device *dev,
			      struct device_attribute *attr, char *buf)
{
	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	const struct wusb_ckhdid *chid;
	ssize_t result = 0;

	if (wusbhc->wuie_host_info != NULL)
		chid = &wusbhc->wuie_host_info->CHID;
	else
		chid = &wusb_ckhdid_zero;

	result += ckhdid_printf(buf, PAGE_SIZE, chid);
	result += sprintf(buf + result, "\n");

	return result;
}

/*
 * Store a new CHID.
 *
 * - Write an all zeros CHID and it will stop the controller
 * - Write a non-zero CHID and it will start it.
 *
 * See wusbhc_chid_set() for more info.
 */
static ssize_t wusb_chid_store(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t size)
{
	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	struct wusb_ckhdid chid;
	ssize_t result;

	result = sscanf(buf,
			"%02hhx %02hhx %02hhx %02hhx "
			"%02hhx %02hhx %02hhx %02hhx "
			"%02hhx %02hhx %02hhx %02hhx "
			"%02hhx %02hhx %02hhx %02hhx\n",
			&chid.data[0] , &chid.data[1] ,
			&chid.data[2] , &chid.data[3] ,
			&chid.data[4] , &chid.data[5] ,
			&chid.data[6] , &chid.data[7] ,
			&chid.data[8] , &chid.data[9] ,
			&chid.data[10], &chid.data[11],
			&chid.data[12], &chid.data[13],
			&chid.data[14], &chid.data[15]);
	if (result != 16) {
		dev_err(dev, "Unrecognized CHID (need 16 8-bit hex digits): "
			"%d\n", (int)result);
		return -EINVAL;
	}
	result = wusbhc_chid_set(wusbhc, &chid);
	return result < 0 ? result : size;
}
static DEVICE_ATTR(wusb_chid, 0644, wusb_chid_show, wusb_chid_store);

/* Group all the WUSBHC attributes */
static struct attribute *wusbhc_attrs[] = {
		&dev_attr_wusb_trust_timeout.attr,
		&dev_attr_wusb_chid.attr,
		NULL,
};

static struct attribute_group wusbhc_attr_group = {
	.name = NULL,	/* we want them in the same directory */
	.attrs = wusbhc_attrs,
};

/*
 * Create a wusbhc instance
 *
 * NOTEs:
 *
 *  - assumes *wusbhc has been zeroed and wusbhc->usb_hcd has been
 *    initialized but not added.
 *
 *  - fill out ports_max, mmcies_max and mmcie_{add,rm} before calling.
 *
 *  - fill out wusbhc->uwb_rc and refcount it before calling
 *  - fill out the wusbhc->sec_modes array
 */
int wusbhc_create(struct wusbhc *wusbhc)
{
	int result = 0;

	wusbhc->trust_timeout = WUSB_TRUST_TIMEOUT_MS;
	mutex_init(&wusbhc->mutex);
	result = wusbhc_mmcie_create(wusbhc);
	if (result < 0)
		goto error_mmcie_create;
	result = wusbhc_devconnect_create(wusbhc);
	if (result < 0)
		goto error_devconnect_create;
	result = wusbhc_rh_create(wusbhc);
	if (result < 0)
		goto error_rh_create;
	result = wusbhc_sec_create(wusbhc);
	if (result < 0)
		goto error_sec_create;
	return 0;

error_sec_create:
	wusbhc_rh_destroy(wusbhc);
error_rh_create:
	wusbhc_devconnect_destroy(wusbhc);
error_devconnect_create:
	wusbhc_mmcie_destroy(wusbhc);
error_mmcie_create:
	return result;
}
EXPORT_SYMBOL_GPL(wusbhc_create);

static inline struct kobject *wusbhc_kobj(struct wusbhc *wusbhc)
{
	return &wusbhc->usb_hcd.self.controller->kobj;
}

/*
 * Phase B of a wusbhc instance creation
 *
 * Creates fields that depend on wusbhc->usb_hcd having been
 * added. This is where we create the sysfs files in
 * /sys/class/usb_host/usb_hostX/.
 *
 * NOTE: Assumes wusbhc->usb_hcd has been already added by the upper
 *       layer (hwahc or whci)
 */
int wusbhc_b_create(struct wusbhc *wusbhc)
{
	int result = 0;
	struct device *dev = wusbhc->usb_hcd.self.controller;

	result = sysfs_create_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
	if (result < 0) {
		dev_err(dev, "Cannot register WUSBHC attributes: %d\n", result);
		goto error_create_attr_group;
	}

	result = wusbhc_pal_register(wusbhc);
	if (result < 0)
		goto error_pal_register;
	return 0;

error_pal_register:
	sysfs_remove_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
error_create_attr_group:
	return result;
}
EXPORT_SYMBOL_GPL(wusbhc_b_create);

void wusbhc_b_destroy(struct wusbhc *wusbhc)
{
	wusbhc_pal_unregister(wusbhc);
	sysfs_remove_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
}
EXPORT_SYMBOL_GPL(wusbhc_b_destroy);

void wusbhc_destroy(struct wusbhc *wusbhc)
{
	wusbhc_sec_destroy(wusbhc);
	wusbhc_rh_destroy(wusbhc);
	wusbhc_devconnect_destroy(wusbhc);
	wusbhc_mmcie_destroy(wusbhc);
}
EXPORT_SYMBOL_GPL(wusbhc_destroy);

struct workqueue_struct *wusbd;
EXPORT_SYMBOL_GPL(wusbd);

/*
 * WUSB Cluster ID allocation map
 *
 * Each WUSB bus in a channel is identified with a Cluster Id in the
 * unauth address pace (WUSB1.0[4.3]). We take the range 0xe0 to 0xff
 * (that's space for 31 WUSB controllers, as 0xff can't be taken). We
 * start taking from 0xff, 0xfe, 0xfd... (hence the += or -= 0xff).
 *
 * For each one we taken, we pin it in the bitap
 */
#define CLUSTER_IDS 32
static DECLARE_BITMAP(wusb_cluster_id_table, CLUSTER_IDS);
static DEFINE_SPINLOCK(wusb_cluster_ids_lock);

/*
 * Get a WUSB Cluster ID
 *
 * Need to release with wusb_cluster_id_put() when done w/ it.
 */
/* FIXME: coordinate with the choose_addres() from the USB stack */
/* we want to leave the top of the 128 range for cluster addresses and
 * the bottom for device addresses (as we map them one on one with
 * ports). */
u8 wusb_cluster_id_get(void)
{
	u8 id;
	spin_lock(&wusb_cluster_ids_lock);
	id = find_first_zero_bit(wusb_cluster_id_table, CLUSTER_IDS);
	if (id > CLUSTER_IDS) {
		id = 0;
		goto out;
	}
	set_bit(id, wusb_cluster_id_table);
	id = (u8) 0xff - id;
out:
	spin_unlock(&wusb_cluster_ids_lock);
	return id;

}
EXPORT_SYMBOL_GPL(wusb_cluster_id_get);

/*
 * Release a WUSB Cluster ID
 *
 * Obtained it with wusb_cluster_id_get()
 */
void wusb_cluster_id_put(u8 id)
{
	id = 0xff - id;
	BUG_ON(id >= CLUSTER_IDS);
	spin_lock(&wusb_cluster_ids_lock);
	WARN_ON(!test_bit(id, wusb_cluster_id_table));
	clear_bit(id, wusb_cluster_id_table);
	spin_unlock(&wusb_cluster_ids_lock);
}
EXPORT_SYMBOL_GPL(wusb_cluster_id_put);

/**
 * wusbhc_giveback_urb - return an URB to the USB core
 * @wusbhc: the host controller the URB is from.
 * @urb:    the URB.
 * @status: the URB's status.
 *
 * Return an URB to the USB core doing some additional WUSB specific
 * processing.
 *
 *  - After a successful transfer, update the trust timeout timestamp
 *    for the WUSB device.
 *
 *  - [WUSB] sections 4.13 and 7.5.1 specifies the stop retrasmittion
 *    condition for the WCONNECTACK_IE is that the host has observed
 *    the associated device responding to a control transfer.
 */
void wusbhc_giveback_urb(struct wusbhc *wusbhc, struct urb *urb, int status)
{
	struct wusb_dev *wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev);

	if (status == 0 && wusb_dev) {
		wusb_dev->entry_ts = jiffies;

		/* wusbhc_devconnect_acked() can't be called from
		   atomic context so defer it to a work queue. */
		if (!list_empty(&wusb_dev->cack_node))
			queue_work(wusbd, &wusb_dev->devconnect_acked_work);
		else
			wusb_dev_put(wusb_dev);
	}

	usb_hcd_giveback_urb(&wusbhc->usb_hcd, urb, status);
}
EXPORT_SYMBOL_GPL(wusbhc_giveback_urb);

/**
 * wusbhc_reset_all - reset the HC hardware
 * @wusbhc: the host controller to reset.
 *
 * Request a full hardware reset of the chip.  This will also reset
 * the radio controller and any other PALs.
 */
void wusbhc_reset_all(struct wusbhc *wusbhc)
{
	uwb_rc_reset_all(wusbhc->uwb_rc);
}
EXPORT_SYMBOL_GPL(wusbhc_reset_all);

static struct notifier_block wusb_usb_notifier = {
	.notifier_call = wusb_usb_ncb,
	.priority = INT_MAX	/* Need to be called first of all */
};

static int __init wusbcore_init(void)
{
	int result;
	result = wusb_crypto_init();
	if (result < 0)
		goto error_crypto_init;
	/* WQ is singlethread because we need to serialize notifications */
	wusbd = create_singlethread_workqueue("wusbd");
	if (wusbd == NULL) {
		result = -ENOMEM;
		printk(KERN_ERR "WUSB-core: Cannot create wusbd workqueue\n");
		goto error_wusbd_create;
	}
	usb_register_notify(&wusb_usb_notifier);
	bitmap_zero(wusb_cluster_id_table, CLUSTER_IDS);
	set_bit(0, wusb_cluster_id_table);	/* reserve Cluster ID 0xff */
	return 0;

error_wusbd_create:
	wusb_crypto_exit();
error_crypto_init:
	return result;

}
module_init(wusbcore_init);

static void __exit wusbcore_exit(void)
{
	clear_bit(0, wusb_cluster_id_table);
	if (!bitmap_empty(wusb_cluster_id_table, CLUSTER_IDS)) {
		char buf[256];
		bitmap_scnprintf(buf, sizeof(buf), wusb_cluster_id_table,
				 CLUSTER_IDS);
		printk(KERN_ERR "BUG: WUSB Cluster IDs not released "
		       "on exit: %s\n", buf);
		WARN_ON(1);
	}
	usb_unregister_notify(&wusb_usb_notifier);
	destroy_workqueue(wusbd);
	wusb_crypto_exit();
}
module_exit(wusbcore_exit);

MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
MODULE_DESCRIPTION("Wireless USB core");
MODULE_LICENSE("GPL");
Commit	Line	Data
90ff96f2 IPG	1	/*
	2	* Wireless USB Host Controller
	3	* sysfs glue, wusbcore module support and life cycle management
	4	*
	5	*
	6	* Copyright (C) 2005-2006 Intel Corporation
	7	* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License version
	11	* 2 as published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	21	* 02110-1301, USA.
	22	*
	23	*
	24	* Creation/destruction of wusbhc is split in two parts; that that
	25	* doesn't require the HCD to be added (wusbhc_{create,destroy}) and
	26	* the one that requires (phase B, wusbhc_b_{create,destroy}).
	27	*
	28	* This is so because usb_add_hcd() will start the HC, and thus, all
	29	* the HC specific stuff has to be already initialiazed (like sysfs
	30	* thingies).
	31	*/
	32	#include <linux/device.h>
	33	#include <linux/module.h>
	34	#include "wusbhc.h"
	35
	36	/**
	37	* Extract the wusbhc that corresponds to a USB Host Controller class device
	38	*
	39	* WARNING! Apply only if @dev is that of a
	40	* wusbhc.usb_hcd.self->class_dev; otherwise, you loose.
	41	*/
	42	static struct wusbhc usbhc_dev_to_wusbhc(struct device dev)
	43	{
	44	struct usb_bus *usb_bus = dev_get_drvdata(dev);
	45	struct usb_hcd *usb_hcd = bus_to_hcd(usb_bus);
	46	return usb_hcd_to_wusbhc(usb_hcd);
	47	}
	48
	49	/*
	50	* Show & store the current WUSB trust timeout
	51	*
	52	* We don't do locking--it is an 'atomic' value.
	53	*
	54	* The units that we store/show are always MILLISECONDS. However, the
	55	* value of trust_timeout is jiffies.
	56	*/
	57	static ssize_t wusb_trust_timeout_show(struct device *dev,
	58	struct device_attribute attr, char buf)
	59	{
	60	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	61
	62	return scnprintf(buf, PAGE_SIZE, "%u\n", wusbhc->trust_timeout);
	63	}
	64
65	static ssize_t wusb_trust_timeout_store(struct device *dev,
66	struct device_attribute *attr,
67	const char *buf, size_t size)
68	{
69	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
70	ssize_t result = -ENOSYS;
71	unsigned trust_timeout;
72
73	result = sscanf(buf, "%u", &trust_timeout);
74	if (result != 1) {
75	result = -EINVAL;
76	goto out;
77	}
78	/* FIXME: maybe we should check for range validity? */
79	wusbhc->trust_timeout = trust_timeout;
80	cancel_delayed_work(&wusbhc->keep_alive_timer);
81	flush_workqueue(wusbd);
82	queue_delayed_work(wusbd, &wusbhc->keep_alive_timer,
83	(trust_timeout * CONFIG_HZ)/1000/2);
84	out:
85	return result < 0 ? result : size;
86	}
87	static DEVICE_ATTR(wusb_trust_timeout, 0644, wusb_trust_timeout_show,
88	wusb_trust_timeout_store);
89
90	/*
fca10c81	91	* Show the current WUSB CHID.
90ff96f2 IPG	92	*/
	93	static ssize_t wusb_chid_show(struct device *dev,
	94	struct device_attribute attr, char buf)
	95	{
	96	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
fca10c81	97	const struct wusb_ckhdid *chid;
90ff96f2 IPG	98	ssize_t result = 0;
	99
	100	if (wusbhc->wuie_host_info != NULL)
fca10c81 DV	101	chid = &wusbhc->wuie_host_info->CHID;
	102	else
	103	chid = &wusb_ckhdid_zero;
	104
	105	result += ckhdid_printf(buf, PAGE_SIZE, chid);
	106	result += sprintf(buf + result, "\n");
	107
90ff96f2 IPG	108	return result;
	109	}
	110
	111	/*
fca10c81	112	* Store a new CHID.
90ff96f2	113	*
fca10c81 DV	114	* - Write an all zeros CHID and it will stop the controller
fca10c81 DV	115	* - Write a non-zero CHID and it will start it.
90ff96f2 IPG	116	*
	117	* See wusbhc_chid_set() for more info.
	118	*/
	119	static ssize_t wusb_chid_store(struct device *dev,
	120	struct device_attribute *attr,
	121	const char *buf, size_t size)
	122	{
	123	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	124	struct wusb_ckhdid chid;
	125	ssize_t result;
	126
	127	result = sscanf(buf,
	128	"%02hhx %02hhx %02hhx %02hhx "
	129	"%02hhx %02hhx %02hhx %02hhx "
	130	"%02hhx %02hhx %02hhx %02hhx "
	131	"%02hhx %02hhx %02hhx %02hhx\n",
	132	&chid.data[0] , &chid.data[1] ,
	133	&chid.data[2] , &chid.data[3] ,
	134	&chid.data[4] , &chid.data[5] ,
	135	&chid.data[6] , &chid.data[7] ,
	136	&chid.data[8] , &chid.data[9] ,
	137	&chid.data[10], &chid.data[11],
	138	&chid.data[12], &chid.data[13],
	139	&chid.data[14], &chid.data[15]);
	140	if (result != 16) {
	141	dev_err(dev, "Unrecognized CHID (need 16 8-bit hex digits): "
	142	"%d\n", (int)result);
	143	return -EINVAL;
	144	}
	145	result = wusbhc_chid_set(wusbhc, &chid);
	146	return result < 0 ? result : size;
	147	}
	148	static DEVICE_ATTR(wusb_chid, 0644, wusb_chid_show, wusb_chid_store);
	149
	150	/* Group all the WUSBHC attributes */
	151	static struct attribute *wusbhc_attrs[] = {
	152	&dev_attr_wusb_trust_timeout.attr,
	153	&dev_attr_wusb_chid.attr,
	154	NULL,
	155	};
	156
	157	static struct attribute_group wusbhc_attr_group = {
	158	.name = NULL, /* we want them in the same directory */
	159	.attrs = wusbhc_attrs,
	160	};
	161
	162	/*
	163	* Create a wusbhc instance
	164	*
	165	* NOTEs:
	166	*
	167	* - assumes *wusbhc has been zeroed and wusbhc->usb_hcd has been
	168	* initialized but not added.
	169	*
	170	* - fill out ports_max, mmcies_max and mmcie_{add,rm} before calling.
	171	*
	172	* - fill out wusbhc->uwb_rc and refcount it before calling
	173	* - fill out the wusbhc->sec_modes array
	174	*/
	175	int wusbhc_create(struct wusbhc *wusbhc)
	176	{
	177	int result = 0;
	178
	179	wusbhc->trust_timeout = WUSB_TRUST_TIMEOUT_MS;
180	mutex_init(&wusbhc->mutex);
181	result = wusbhc_mmcie_create(wusbhc);
182	if (result < 0)
183	goto error_mmcie_create;
184	result = wusbhc_devconnect_create(wusbhc);
185	if (result < 0)
186	goto error_devconnect_create;
187	result = wusbhc_rh_create(wusbhc);
188	if (result < 0)
189	goto error_rh_create;
190	result = wusbhc_sec_create(wusbhc);
191	if (result < 0)
192	goto error_sec_create;
90ff96f2 IPG	193	return 0;
90ff96f2 IPG	194
90ff96f2 IPG	195	error_sec_create:
	196	wusbhc_rh_destroy(wusbhc);
	197	error_rh_create:
	198	wusbhc_devconnect_destroy(wusbhc);
	199	error_devconnect_create:
	200	wusbhc_mmcie_destroy(wusbhc);
	201	error_mmcie_create:
	202	return result;
	203	}
	204	EXPORT_SYMBOL_GPL(wusbhc_create);
	205
	206	static inline struct kobject wusbhc_kobj(struct wusbhc wusbhc)
	207	{
	208	return &wusbhc->usb_hcd.self.controller->kobj;
	209	}
	210
	211	/*
	212	* Phase B of a wusbhc instance creation
	213	*
	214	* Creates fields that depend on wusbhc->usb_hcd having been
	215	* added. This is where we create the sysfs files in
	216	* /sys/class/usb_host/usb_hostX/.
	217	*
	218	* NOTE: Assumes wusbhc->usb_hcd has been already added by the upper
	219	* layer (hwahc or whci)
	220	*/
	221	int wusbhc_b_create(struct wusbhc *wusbhc)
	222	{
	223	int result = 0;
	224	struct device *dev = wusbhc->usb_hcd.self.controller;
	225
	226	result = sysfs_create_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
	227	if (result < 0) {
	228	dev_err(dev, "Cannot register WUSBHC attributes: %d\n", result);
	229	goto error_create_attr_group;
	230	}
b60066c1 DV	231
	232	result = wusbhc_pal_register(wusbhc);
	233	if (result < 0)
	234	goto error_pal_register;
	235	return 0;
	236
	237	error_pal_register:
	238	sysfs_remove_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
90ff96f2 IPG	239	error_create_attr_group:
	240	return result;
	241	}
	242	EXPORT_SYMBOL_GPL(wusbhc_b_create);
	243
	244	void wusbhc_b_destroy(struct wusbhc *wusbhc)
	245	{
b60066c1	246	wusbhc_pal_unregister(wusbhc);
90ff96f2 IPG	247	sysfs_remove_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
	248	}
	249	EXPORT_SYMBOL_GPL(wusbhc_b_destroy);
	250
	251	void wusbhc_destroy(struct wusbhc *wusbhc)
	252	{
90ff96f2 IPG	253	wusbhc_sec_destroy(wusbhc);
	254	wusbhc_rh_destroy(wusbhc);
	255	wusbhc_devconnect_destroy(wusbhc);
	256	wusbhc_mmcie_destroy(wusbhc);
	257	}
	258	EXPORT_SYMBOL_GPL(wusbhc_destroy);
	259
	260	struct workqueue_struct *wusbd;
	261	EXPORT_SYMBOL_GPL(wusbd);
	262
	263	/*
	264	* WUSB Cluster ID allocation map
	265	*
	266	* Each WUSB bus in a channel is identified with a Cluster Id in the
	267	* unauth address pace (WUSB1.0[4.3]). We take the range 0xe0 to 0xff
	268	* (that's space for 31 WUSB controllers, as 0xff can't be taken). We
	269	* start taking from 0xff, 0xfe, 0xfd... (hence the += or -= 0xff).
	270	*
	271	* For each one we taken, we pin it in the bitap
	272	*/
	273	#define CLUSTER_IDS 32
	274	static DECLARE_BITMAP(wusb_cluster_id_table, CLUSTER_IDS);
	275	static DEFINE_SPINLOCK(wusb_cluster_ids_lock);
	276
	277	/*
	278	* Get a WUSB Cluster ID
	279	*
	280	* Need to release with wusb_cluster_id_put() when done w/ it.
	281	*/
	282	/* FIXME: coordinate with the choose_addres() from the USB stack */
	283	/* we want to leave the top of the 128 range for cluster addresses and
	284	* the bottom for device addresses (as we map them one on one with
	285	* ports). */
	286	u8 wusb_cluster_id_get(void)
	287	{
	288	u8 id;
	289	spin_lock(&wusb_cluster_ids_lock);
	290	id = find_first_zero_bit(wusb_cluster_id_table, CLUSTER_IDS);
	291	if (id > CLUSTER_IDS) {
	292	id = 0;
	293	goto out;
	294	}
	295	set_bit(id, wusb_cluster_id_table);
	296	id = (u8) 0xff - id;
	297	out:
	298	spin_unlock(&wusb_cluster_ids_lock);
	299	return id;
	300
	301	}
	302	EXPORT_SYMBOL_GPL(wusb_cluster_id_get);
	303
	304	/*
	305	* Release a WUSB Cluster ID
	306	*
	307	* Obtained it with wusb_cluster_id_get()
	308	*/
	309	void wusb_cluster_id_put(u8 id)
	310	{
	311	id = 0xff - id;
	312	BUG_ON(id >= CLUSTER_IDS);
	313	spin_lock(&wusb_cluster_ids_lock);
	314	WARN_ON(!test_bit(id, wusb_cluster_id_table));
	315	clear_bit(id, wusb_cluster_id_table);
	316	spin_unlock(&wusb_cluster_ids_lock);
317	}
318	EXPORT_SYMBOL_GPL(wusb_cluster_id_put);
319
320	/**
321	* wusbhc_giveback_urb - return an URB to the USB core
322	* @wusbhc: the host controller the URB is from.
323	* @urb: the URB.
324	* @status: the URB's status.
325	*
326	* Return an URB to the USB core doing some additional WUSB specific
327	* processing.
328	*
329	* - After a successful transfer, update the trust timeout timestamp
330	* for the WUSB device.
331	*
332	* - [WUSB] sections 4.13 and 7.5.1 specifies the stop retrasmittion
333	* condition for the WCONNECTACK_IE is that the host has observed
334	* the associated device responding to a control transfer.
335	*/
336	void wusbhc_giveback_urb(struct wusbhc wusbhc, struct urb urb, int status)
337	{
338	struct wusb_dev *wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev);
339
5936ac7f	340	if (status == 0 && wusb_dev) {
90ff96f2 IPG	341	wusb_dev->entry_ts = jiffies;
90ff96f2 IPG	342
5936ac7f	343	/* wusbhc_devconnect_acked() can't be called from
90ff96f2 IPG	344	atomic context so defer it to a work queue. */
	345	if (!list_empty(&wusb_dev->cack_node))
	346	queue_work(wusbd, &wusb_dev->devconnect_acked_work);
5936ac7f DV	347	else
5936ac7f DV	348	wusb_dev_put(wusb_dev);
90ff96f2 IPG	349	}
	350
	351	usb_hcd_giveback_urb(&wusbhc->usb_hcd, urb, status);
	352	}
	353	EXPORT_SYMBOL_GPL(wusbhc_giveback_urb);
	354
	355	/**
	356	* wusbhc_reset_all - reset the HC hardware
	357	* @wusbhc: the host controller to reset.
	358	*
	359	* Request a full hardware reset of the chip. This will also reset
	360	* the radio controller and any other PALs.
	361	*/
	362	void wusbhc_reset_all(struct wusbhc *wusbhc)
	363	{
	364	uwb_rc_reset_all(wusbhc->uwb_rc);
	365	}
	366	EXPORT_SYMBOL_GPL(wusbhc_reset_all);
	367
	368	static struct notifier_block wusb_usb_notifier = {
	369	.notifier_call = wusb_usb_ncb,
	370	.priority = INT_MAX /* Need to be called first of all */
	371	};
	372
	373	static int __init wusbcore_init(void)
	374	{
	375	int result;
	376	result = wusb_crypto_init();
	377	if (result < 0)
	378	goto error_crypto_init;
	379	/* WQ is singlethread because we need to serialize notifications */
	380	wusbd = create_singlethread_workqueue("wusbd");
	381	if (wusbd == NULL) {
	382	result = -ENOMEM;
	383	printk(KERN_ERR "WUSB-core: Cannot create wusbd workqueue\n");
	384	goto error_wusbd_create;
	385	}
	386	usb_register_notify(&wusb_usb_notifier);
	387	bitmap_zero(wusb_cluster_id_table, CLUSTER_IDS);
	388	set_bit(0, wusb_cluster_id_table); /* reserve Cluster ID 0xff */
	389	return 0;
	390
	391	error_wusbd_create:
	392	wusb_crypto_exit();
	393	error_crypto_init:
	394	return result;
	395
	396	}
	397	module_init(wusbcore_init);
	398
	399	static void __exit wusbcore_exit(void)
	400	{
	401	clear_bit(0, wusb_cluster_id_table);
	402	if (!bitmap_empty(wusb_cluster_id_table, CLUSTER_IDS)) {
	403	char buf[256];
	404	bitmap_scnprintf(buf, sizeof(buf), wusb_cluster_id_table,
	405	CLUSTER_IDS);
	406	printk(KERN_ERR "BUG: WUSB Cluster IDs not released "
	407	"on exit: %s\n", buf);
	408	WARN_ON(1);
	409	}
	410	usb_unregister_notify(&wusb_usb_notifier);
	411	destroy_workqueue(wusbd);
	412	wusb_crypto_exit();
413	}
414	module_exit(wusbcore_exit);
415
416	MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
417	MODULE_DESCRIPTION("Wireless USB core");
418	MODULE_LICENSE("GPL");