[mirror_ubuntu-artful-kernel.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 initialized (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);


static ssize_t wusb_phy_rate_show(struct device *dev,
				  struct device_attribute *attr,
				  char *buf)
{
	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);

	return sprintf(buf, "%d\n", wusbhc->phy_rate);
}

static ssize_t wusb_phy_rate_store(struct device *dev,
				   struct device_attribute *attr,
				   const char *buf, size_t size)
{
	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	uint8_t phy_rate;
	ssize_t result;

	result = sscanf(buf, "%hhu", &phy_rate);
	if (result != 1)
		return -EINVAL;
	if (phy_rate >= UWB_PHY_RATE_INVALID)
		return -EINVAL;

	wusbhc->phy_rate = phy_rate;
	return size;
}
static DEVICE_ATTR(wusb_phy_rate, 0644, wusb_phy_rate_show, wusb_phy_rate_store);

/* Group all the WUSBHC attributes */
static struct attribute *wusbhc_attrs[] = {
		&dev_attr_wusb_trust_timeout.attr,
		&dev_attr_wusb_chid.attr,
		&dev_attr_wusb_phy_rate.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;
	wusbhc->phy_rate = UWB_PHY_RATE_INVALID - 1;

	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
421f91d2	29	* the HC specific stuff has to be already initialized (like sysfs
90ff96f2 IPG	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
c3f22d92 DV	150
	151	static ssize_t wusb_phy_rate_show(struct device *dev,
	152	struct device_attribute *attr,
	153	char *buf)
	154	{
	155	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	156
	157	return sprintf(buf, "%d\n", wusbhc->phy_rate);
	158	}
	159
	160	static ssize_t wusb_phy_rate_store(struct device *dev,
	161	struct device_attribute *attr,
	162	const char *buf, size_t size)
	163	{
	164	struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
	165	uint8_t phy_rate;
	166	ssize_t result;
	167
	168	result = sscanf(buf, "%hhu", &phy_rate);
	169	if (result != 1)
	170	return -EINVAL;
	171	if (phy_rate >= UWB_PHY_RATE_INVALID)
	172	return -EINVAL;
	173
	174	wusbhc->phy_rate = phy_rate;
	175	return size;
	176	}
	177	static DEVICE_ATTR(wusb_phy_rate, 0644, wusb_phy_rate_show, wusb_phy_rate_store);
	178
90ff96f2 IPG	179	/* Group all the WUSBHC attributes */
	180	static struct attribute *wusbhc_attrs[] = {
	181	&dev_attr_wusb_trust_timeout.attr,
	182	&dev_attr_wusb_chid.attr,
c3f22d92	183	&dev_attr_wusb_phy_rate.attr,
90ff96f2 IPG	184	NULL,
	185	};
	186
	187	static struct attribute_group wusbhc_attr_group = {
	188	.name = NULL, /* we want them in the same directory */
	189	.attrs = wusbhc_attrs,
	190	};
	191
	192	/*
	193	* Create a wusbhc instance
	194	*
	195	* NOTEs:
	196	*
	197	* - assumes *wusbhc has been zeroed and wusbhc->usb_hcd has been
	198	* initialized but not added.
	199	*
	200	* - fill out ports_max, mmcies_max and mmcie_{add,rm} before calling.
	201	*
	202	* - fill out wusbhc->uwb_rc and refcount it before calling
	203	* - fill out the wusbhc->sec_modes array
	204	*/
	205	int wusbhc_create(struct wusbhc *wusbhc)
	206	{
	207	int result = 0;
	208
	209	wusbhc->trust_timeout = WUSB_TRUST_TIMEOUT_MS;
c3f22d92 DV	210	wusbhc->phy_rate = UWB_PHY_RATE_INVALID - 1;
c3f22d92 DV	211
90ff96f2 IPG	212	mutex_init(&wusbhc->mutex);
	213	result = wusbhc_mmcie_create(wusbhc);
	214	if (result < 0)
	215	goto error_mmcie_create;
	216	result = wusbhc_devconnect_create(wusbhc);
	217	if (result < 0)
	218	goto error_devconnect_create;
	219	result = wusbhc_rh_create(wusbhc);
	220	if (result < 0)
	221	goto error_rh_create;
	222	result = wusbhc_sec_create(wusbhc);
	223	if (result < 0)
	224	goto error_sec_create;
90ff96f2 IPG	225	return 0;
90ff96f2 IPG	226
90ff96f2 IPG	227	error_sec_create:
	228	wusbhc_rh_destroy(wusbhc);
	229	error_rh_create:
	230	wusbhc_devconnect_destroy(wusbhc);
	231	error_devconnect_create:
	232	wusbhc_mmcie_destroy(wusbhc);
	233	error_mmcie_create:
	234	return result;
	235	}
	236	EXPORT_SYMBOL_GPL(wusbhc_create);
	237
	238	static inline struct kobject wusbhc_kobj(struct wusbhc wusbhc)
	239	{
	240	return &wusbhc->usb_hcd.self.controller->kobj;
	241	}
	242
	243	/*
	244	* Phase B of a wusbhc instance creation
	245	*
	246	* Creates fields that depend on wusbhc->usb_hcd having been
	247	* added. This is where we create the sysfs files in
	248	* /sys/class/usb_host/usb_hostX/.
	249	*
	250	* NOTE: Assumes wusbhc->usb_hcd has been already added by the upper
	251	* layer (hwahc or whci)
	252	*/
	253	int wusbhc_b_create(struct wusbhc *wusbhc)
	254	{
	255	int result = 0;
	256	struct device *dev = wusbhc->usb_hcd.self.controller;
	257
	258	result = sysfs_create_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
	259	if (result < 0) {
	260	dev_err(dev, "Cannot register WUSBHC attributes: %d\n", result);
	261	goto error_create_attr_group;
	262	}
b60066c1 DV	263
	264	result = wusbhc_pal_register(wusbhc);
	265	if (result < 0)
	266	goto error_pal_register;
	267	return 0;
	268
	269	error_pal_register:
	270	sysfs_remove_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
90ff96f2 IPG	271	error_create_attr_group:
	272	return result;
	273	}
	274	EXPORT_SYMBOL_GPL(wusbhc_b_create);
	275
	276	void wusbhc_b_destroy(struct wusbhc *wusbhc)
	277	{
b60066c1	278	wusbhc_pal_unregister(wusbhc);
90ff96f2 IPG	279	sysfs_remove_group(wusbhc_kobj(wusbhc), &wusbhc_attr_group);
	280	}
	281	EXPORT_SYMBOL_GPL(wusbhc_b_destroy);
	282
	283	void wusbhc_destroy(struct wusbhc *wusbhc)
	284	{
90ff96f2 IPG	285	wusbhc_sec_destroy(wusbhc);
	286	wusbhc_rh_destroy(wusbhc);
	287	wusbhc_devconnect_destroy(wusbhc);
	288	wusbhc_mmcie_destroy(wusbhc);
	289	}
	290	EXPORT_SYMBOL_GPL(wusbhc_destroy);
	291
	292	struct workqueue_struct *wusbd;
	293	EXPORT_SYMBOL_GPL(wusbd);
	294
	295	/*
	296	* WUSB Cluster ID allocation map
	297	*
	298	* Each WUSB bus in a channel is identified with a Cluster Id in the
	299	* unauth address pace (WUSB1.0[4.3]). We take the range 0xe0 to 0xff
	300	* (that's space for 31 WUSB controllers, as 0xff can't be taken). We
	301	* start taking from 0xff, 0xfe, 0xfd... (hence the += or -= 0xff).
	302	*
	303	* For each one we taken, we pin it in the bitap
	304	*/
	305	#define CLUSTER_IDS 32
	306	static DECLARE_BITMAP(wusb_cluster_id_table, CLUSTER_IDS);
	307	static DEFINE_SPINLOCK(wusb_cluster_ids_lock);
	308
	309	/*
	310	* Get a WUSB Cluster ID
	311	*
	312	* Need to release with wusb_cluster_id_put() when done w/ it.
	313	*/
	314	/* FIXME: coordinate with the choose_addres() from the USB stack */
	315	/* we want to leave the top of the 128 range for cluster addresses and
	316	* the bottom for device addresses (as we map them one on one with
	317	* ports). */
	318	u8 wusb_cluster_id_get(void)
	319	{
	320	u8 id;
	321	spin_lock(&wusb_cluster_ids_lock);
	322	id = find_first_zero_bit(wusb_cluster_id_table, CLUSTER_IDS);
	323	if (id > CLUSTER_IDS) {
	324	id = 0;
	325	goto out;
	326	}
	327	set_bit(id, wusb_cluster_id_table);
	328	id = (u8) 0xff - id;
	329	out:
	330	spin_unlock(&wusb_cluster_ids_lock);
	331	return id;
	332
	333	}
	334	EXPORT_SYMBOL_GPL(wusb_cluster_id_get);
	335
	336	/*
	337	* Release a WUSB Cluster ID
	338	*
	339	* Obtained it with wusb_cluster_id_get()
	340	*/
	341	void wusb_cluster_id_put(u8 id)
	342	{
	343	id = 0xff - id;
	344	BUG_ON(id >= CLUSTER_IDS);
	345	spin_lock(&wusb_cluster_ids_lock);
	346	WARN_ON(!test_bit(id, wusb_cluster_id_table));
	347	clear_bit(id, wusb_cluster_id_table);
	348	spin_unlock(&wusb_cluster_ids_lock);
349	}
350	EXPORT_SYMBOL_GPL(wusb_cluster_id_put);
351
352	/**
353	* wusbhc_giveback_urb - return an URB to the USB core
354	* @wusbhc: the host controller the URB is from.
355	* @urb: the URB.
356	* @status: the URB's status.
357	*
358	* Return an URB to the USB core doing some additional WUSB specific
359	* processing.
360	*
361	* - After a successful transfer, update the trust timeout timestamp
362	* for the WUSB device.
363	*
364	* - [WUSB] sections 4.13 and 7.5.1 specifies the stop retrasmittion
365	* condition for the WCONNECTACK_IE is that the host has observed
366	* the associated device responding to a control transfer.
367	*/
368	void wusbhc_giveback_urb(struct wusbhc wusbhc, struct urb urb, int status)
369	{
370	struct wusb_dev *wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev);
371
5936ac7f	372	if (status == 0 && wusb_dev) {
90ff96f2 IPG	373	wusb_dev->entry_ts = jiffies;
90ff96f2 IPG	374
5936ac7f	375	/* wusbhc_devconnect_acked() can't be called from
90ff96f2 IPG	376	atomic context so defer it to a work queue. */
	377	if (!list_empty(&wusb_dev->cack_node))
	378	queue_work(wusbd, &wusb_dev->devconnect_acked_work);
5936ac7f DV	379	else
5936ac7f DV	380	wusb_dev_put(wusb_dev);
90ff96f2 IPG	381	}
	382
	383	usb_hcd_giveback_urb(&wusbhc->usb_hcd, urb, status);
	384	}
	385	EXPORT_SYMBOL_GPL(wusbhc_giveback_urb);
	386
	387	/**
	388	* wusbhc_reset_all - reset the HC hardware
	389	* @wusbhc: the host controller to reset.
	390	*
	391	* Request a full hardware reset of the chip. This will also reset
	392	* the radio controller and any other PALs.
	393	*/
	394	void wusbhc_reset_all(struct wusbhc *wusbhc)
	395	{
	396	uwb_rc_reset_all(wusbhc->uwb_rc);
	397	}
	398	EXPORT_SYMBOL_GPL(wusbhc_reset_all);
	399
	400	static struct notifier_block wusb_usb_notifier = {
	401	.notifier_call = wusb_usb_ncb,
	402	.priority = INT_MAX /* Need to be called first of all */
	403	};
	404
	405	static int __init wusbcore_init(void)
	406	{
	407	int result;
	408	result = wusb_crypto_init();
	409	if (result < 0)
	410	goto error_crypto_init;
	411	/* WQ is singlethread because we need to serialize notifications */
	412	wusbd = create_singlethread_workqueue("wusbd");
	413	if (wusbd == NULL) {
	414	result = -ENOMEM;
	415	printk(KERN_ERR "WUSB-core: Cannot create wusbd workqueue\n");
	416	goto error_wusbd_create;
	417	}
	418	usb_register_notify(&wusb_usb_notifier);
	419	bitmap_zero(wusb_cluster_id_table, CLUSTER_IDS);
	420	set_bit(0, wusb_cluster_id_table); /* reserve Cluster ID 0xff */
	421	return 0;
	422
	423	error_wusbd_create:
	424	wusb_crypto_exit();
	425	error_crypto_init:
	426	return result;
	427
	428	}
	429	module_init(wusbcore_init);
	430
	431	static void __exit wusbcore_exit(void)
	432	{
	433	clear_bit(0, wusb_cluster_id_table);
	434	if (!bitmap_empty(wusb_cluster_id_table, CLUSTER_IDS)) {
	435	char buf[256];
	436	bitmap_scnprintf(buf, sizeof(buf), wusb_cluster_id_table,
	437	CLUSTER_IDS);
	438	printk(KERN_ERR "BUG: WUSB Cluster IDs not released "
	439	"on exit: %s\n", buf);
	440	WARN_ON(1);
	441	}
	442	usb_unregister_notify(&wusb_usb_notifier);
	443	destroy_workqueue(wusbd);
	444	wusb_crypto_exit();
445	}
446	module_exit(wusbcore_exit);
447
448	MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
449	MODULE_DESCRIPTION("Wireless USB core");
450	MODULE_LICENSE("GPL");