linux/drivers/usb/host/hwa-hc.c
Alan Stern 541c7d432f USB: convert usb_hcd bitfields into atomic flags
This patch (as1393) converts several of the single-bit fields in
struct usb_hcd to atomic flags.  This is for safety's sake; not all
CPUs can update bitfield values atomically, and these flags are used
in multiple contexts.

The flag fields that are set only during registration or removal can
remain as they are, since non-atomic accesses at those times will not
cause any problems.

(Strictly speaking, the authorized_default flag should become atomic
as well.  I didn't bother with it because it gets changed only via
sysfs.  It can be done later, if anyone wants.)

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-10 14:35:37 -07:00

856 lines
26 KiB
C

/*
* Host Wire Adapter:
* Driver glue, HWA-specific functions, bridges to WAHC and WUSBHC
*
* 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.
*
*
* The HWA driver is a simple layer that forwards requests to the WAHC
* (Wire Adater Host Controller) or WUSBHC (Wireless USB Host
* Controller) layers.
*
* Host Wire Adapter is the 'WUSB 1.0 standard' name for Wireless-USB
* Host Controller that is connected to your system via USB (a USB
* dongle that implements a USB host...). There is also a Device Wired
* Adaptor, DWA (Wireless USB hub) that uses the same mechanism for
* transferring data (it is after all a USB host connected via
* Wireless USB), we have a common layer called Wire Adapter Host
* Controller that does all the hard work. The WUSBHC (Wireless USB
* Host Controller) is the part common to WUSB Host Controllers, the
* HWA and the PCI-based one, that is implemented following the WHCI
* spec. All these layers are implemented in ../wusbcore.
*
* The main functions are hwahc_op_urb_{en,de}queue(), that pass the
* job of converting a URB to a Wire Adapter
*
* Entry points:
*
* hwahc_driver_*() Driver initialization, registration and
* teardown.
*
* hwahc_probe() New device came up, create an instance for
* it [from device enumeration].
*
* hwahc_disconnect() Remove device instance [from device
* enumeration].
*
* [__]hwahc_op_*() Host-Wire-Adaptor specific functions for
* starting/stopping/etc (some might be made also
* DWA).
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/wait.h>
#include <linux/completion.h>
#include "../wusbcore/wa-hc.h"
#include "../wusbcore/wusbhc.h"
struct hwahc {
struct wusbhc wusbhc; /* has to be 1st */
struct wahc wa;
};
/*
* FIXME should be wusbhc
*
* NOTE: we need to cache the Cluster ID because later...there is no
* way to get it :)
*/
static int __hwahc_set_cluster_id(struct hwahc *hwahc, u8 cluster_id)
{
int result;
struct wusbhc *wusbhc = &hwahc->wusbhc;
struct wahc *wa = &hwahc->wa;
struct device *dev = &wa->usb_iface->dev;
result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_SET_CLUSTER_ID,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
cluster_id,
wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
NULL, 0, 1000 /* FIXME: arbitrary */);
if (result < 0)
dev_err(dev, "Cannot set WUSB Cluster ID to 0x%02x: %d\n",
cluster_id, result);
else
wusbhc->cluster_id = cluster_id;
dev_info(dev, "Wireless USB Cluster ID set to 0x%02x\n", cluster_id);
return result;
}
static int __hwahc_op_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
{
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_SET_NUM_DNTS,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
interval << 8 | slots,
wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
NULL, 0, 1000 /* FIXME: arbitrary */);
}
/*
* Reset a WUSB host controller and wait for it to complete doing it.
*
* @usb_hcd: Pointer to WUSB Host Controller instance.
*
*/
static int hwahc_op_reset(struct usb_hcd *usb_hcd)
{
int result;
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct device *dev = &hwahc->wa.usb_iface->dev;
mutex_lock(&wusbhc->mutex);
wa_nep_disarm(&hwahc->wa);
result = __wa_set_feature(&hwahc->wa, WA_RESET);
if (result < 0) {
dev_err(dev, "error commanding HC to reset: %d\n", result);
goto error_unlock;
}
result = __wa_wait_status(&hwahc->wa, WA_STATUS_RESETTING, 0);
if (result < 0) {
dev_err(dev, "error waiting for HC to reset: %d\n", result);
goto error_unlock;
}
error_unlock:
mutex_unlock(&wusbhc->mutex);
return result;
}
/*
* FIXME: break this function up
*/
static int hwahc_op_start(struct usb_hcd *usb_hcd)
{
u8 addr;
int result;
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
result = -ENOSPC;
mutex_lock(&wusbhc->mutex);
addr = wusb_cluster_id_get();
if (addr == 0)
goto error_cluster_id_get;
result = __hwahc_set_cluster_id(hwahc, addr);
if (result < 0)
goto error_set_cluster_id;
usb_hcd->uses_new_polling = 1;
set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags);
usb_hcd->state = HC_STATE_RUNNING;
result = 0;
out:
mutex_unlock(&wusbhc->mutex);
return result;
error_set_cluster_id:
wusb_cluster_id_put(wusbhc->cluster_id);
error_cluster_id_get:
goto out;
}
/*
* No need to abort pipes, as when this is called, all the children
* has been disconnected and that has done it [through
* usb_disable_interface() -> usb_disable_endpoint() ->
* hwahc_op_ep_disable() - >rpipe_ep_disable()].
*/
static void hwahc_op_stop(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
mutex_lock(&wusbhc->mutex);
wusb_cluster_id_put(wusbhc->cluster_id);
mutex_unlock(&wusbhc->mutex);
}
static int hwahc_op_get_frame_number(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
usb_hcd, hwahc);
return -ENOSYS;
}
static int hwahc_op_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
gfp_t gfp)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
return wa_urb_enqueue(&hwahc->wa, urb->ep, urb, gfp);
}
static int hwahc_op_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb,
int status)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
return wa_urb_dequeue(&hwahc->wa, urb);
}
/*
* Release resources allocated for an endpoint
*
* If there is an associated rpipe to this endpoint, go ahead and put it.
*/
static void hwahc_op_endpoint_disable(struct usb_hcd *usb_hcd,
struct usb_host_endpoint *ep)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
rpipe_ep_disable(&hwahc->wa, ep);
}
static int __hwahc_op_wusbhc_start(struct wusbhc *wusbhc)
{
int result;
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct device *dev = &hwahc->wa.usb_iface->dev;
result = __wa_set_feature(&hwahc->wa, WA_ENABLE);
if (result < 0) {
dev_err(dev, "error commanding HC to start: %d\n", result);
goto error_stop;
}
result = __wa_wait_status(&hwahc->wa, WA_ENABLE, WA_ENABLE);
if (result < 0) {
dev_err(dev, "error waiting for HC to start: %d\n", result);
goto error_stop;
}
result = wa_nep_arm(&hwahc->wa, GFP_KERNEL);
if (result < 0) {
dev_err(dev, "cannot listen to notifications: %d\n", result);
goto error_stop;
}
return result;
error_stop:
__wa_clear_feature(&hwahc->wa, WA_ENABLE);
return result;
}
static void __hwahc_op_wusbhc_stop(struct wusbhc *wusbhc, int delay)
{
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
int ret;
ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_CHAN_STOP,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
delay * 1000,
iface_no,
NULL, 0, 1000 /* FIXME: arbitrary */);
if (ret == 0)
msleep(delay);
wa_nep_disarm(&hwahc->wa);
__wa_stop(&hwahc->wa);
}
/*
* Set the UWB MAS allocation for the WUSB cluster
*
* @stream_index: stream to use (-1 for cancelling the allocation)
* @mas: mas bitmap to use
*/
static int __hwahc_op_bwa_set(struct wusbhc *wusbhc, s8 stream_index,
const struct uwb_mas_bm *mas)
{
int result;
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
struct device *dev = &wa->usb_iface->dev;
u8 mas_le[UWB_NUM_MAS/8];
/* Set the stream index */
result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_SET_STREAM_IDX,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
stream_index,
wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
NULL, 0, 1000 /* FIXME: arbitrary */);
if (result < 0) {
dev_err(dev, "Cannot set WUSB stream index: %d\n", result);
goto out;
}
uwb_mas_bm_copy_le(mas_le, mas);
/* Set the MAS allocation */
result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_SET_WUSB_MAS,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
mas_le, 32, 1000 /* FIXME: arbitrary */);
if (result < 0)
dev_err(dev, "Cannot set WUSB MAS allocation: %d\n", result);
out:
return result;
}
/*
* Add an IE to the host's MMC
*
* @interval: See WUSB1.0[8.5.3.1]
* @repeat_cnt: See WUSB1.0[8.5.3.1]
* @handle: See WUSB1.0[8.5.3.1]
* @wuie: Pointer to the header of the WUSB IE data to add.
* MUST BE allocated in a kmalloc buffer (no stack or
* vmalloc).
*
* NOTE: the format of the WUSB IEs for MMCs are different to the
* normal MBOA MAC IEs (IE Id + Length in MBOA MAC vs. Length +
* Id in WUSB IEs). Standards...you gotta love'em.
*/
static int __hwahc_op_mmcie_add(struct wusbhc *wusbhc, u8 interval,
u8 repeat_cnt, u8 handle,
struct wuie_hdr *wuie)
{
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_ADD_MMC_IE,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
interval << 8 | repeat_cnt,
handle << 8 | iface_no,
wuie, wuie->bLength, 1000 /* FIXME: arbitrary */);
}
/*
* Remove an IE to the host's MMC
*
* @handle: See WUSB1.0[8.5.3.1]
*/
static int __hwahc_op_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
{
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_REMOVE_MMC_IE,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, handle << 8 | iface_no,
NULL, 0, 1000 /* FIXME: arbitrary */);
}
/*
* Update device information for a given fake port
*
* @port_idx: Fake port to which device is connected (wusbhc index, not
* USB port number).
*/
static int __hwahc_op_dev_info_set(struct wusbhc *wusbhc,
struct wusb_dev *wusb_dev)
{
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
struct hwa_dev_info *dev_info;
int ret;
/* fill out the Device Info buffer and send it */
dev_info = kzalloc(sizeof(struct hwa_dev_info), GFP_KERNEL);
if (!dev_info)
return -ENOMEM;
uwb_mas_bm_copy_le(dev_info->bmDeviceAvailability,
&wusb_dev->availability);
dev_info->bDeviceAddress = wusb_dev->addr;
/*
* If the descriptors haven't been read yet, use a default PHY
* rate of 53.3 Mbit/s only. The correct value will be used
* when this will be called again as part of the
* authentication process (which occurs after the descriptors
* have been read).
*/
if (wusb_dev->wusb_cap_descr)
dev_info->wPHYRates = wusb_dev->wusb_cap_descr->wPHYRates;
else
dev_info->wPHYRates = cpu_to_le16(USB_WIRELESS_PHY_53);
ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
WUSB_REQ_SET_DEV_INFO,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, wusb_dev->port_idx << 8 | iface_no,
dev_info, sizeof(struct hwa_dev_info),
1000 /* FIXME: arbitrary */);
kfree(dev_info);
return ret;
}
/*
* Set host's idea of which encryption (and key) method to use when
* talking to ad evice on a given port.
*
* If key is NULL, it means disable encryption for that "virtual port"
* (used when we disconnect).
*/
static int __hwahc_dev_set_key(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
const void *key, size_t key_size,
u8 key_idx)
{
int result = -ENOMEM;
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
struct usb_key_descriptor *keyd;
size_t keyd_len;
keyd_len = sizeof(*keyd) + key_size;
keyd = kzalloc(keyd_len, GFP_KERNEL);
if (keyd == NULL)
return -ENOMEM;
keyd->bLength = keyd_len;
keyd->bDescriptorType = USB_DT_KEY;
keyd->tTKID[0] = (tkid >> 0) & 0xff;
keyd->tTKID[1] = (tkid >> 8) & 0xff;
keyd->tTKID[2] = (tkid >> 16) & 0xff;
memcpy(keyd->bKeyData, key, key_size);
result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
USB_REQ_SET_DESCRIPTOR,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
USB_DT_KEY << 8 | key_idx,
port_idx << 8 | iface_no,
keyd, keyd_len, 1000 /* FIXME: arbitrary */);
kzfree(keyd); /* clear keys etc. */
return result;
}
/*
* Set host's idea of which encryption (and key) method to use when
* talking to ad evice on a given port.
*
* If key is NULL, it means disable encryption for that "virtual port"
* (used when we disconnect).
*/
static int __hwahc_op_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
const void *key, size_t key_size)
{
int result = -ENOMEM;
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
u8 encryption_value;
/* Tell the host which key to use to talk to the device */
if (key) {
u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_PTK,
WUSB_KEY_INDEX_ORIGINATOR_HOST);
result = __hwahc_dev_set_key(wusbhc, port_idx, tkid,
key, key_size, key_idx);
if (result < 0)
goto error_set_key;
encryption_value = wusbhc->ccm1_etd->bEncryptionValue;
} else {
/* FIXME: this should come from wusbhc->etd[UNSECURE].value */
encryption_value = 0;
}
/* Set the encryption type for commmunicating with the device */
result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
USB_REQ_SET_ENCRYPTION,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
encryption_value, port_idx << 8 | iface_no,
NULL, 0, 1000 /* FIXME: arbitrary */);
if (result < 0)
dev_err(wusbhc->dev, "Can't set host's WUSB encryption for "
"port index %u to %s (value %d): %d\n", port_idx,
wusb_et_name(wusbhc->ccm1_etd->bEncryptionType),
wusbhc->ccm1_etd->bEncryptionValue, result);
error_set_key:
return result;
}
/*
* Set host's GTK key
*/
static int __hwahc_op_set_gtk(struct wusbhc *wusbhc, u32 tkid,
const void *key, size_t key_size)
{
u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_GTK,
WUSB_KEY_INDEX_ORIGINATOR_HOST);
return __hwahc_dev_set_key(wusbhc, 0, tkid, key, key_size, key_idx);
}
/*
* Get the Wire Adapter class-specific descriptor
*
* NOTE: this descriptor comes with the big bundled configuration
* descriptor that includes the interfaces' and endpoints', so
* we just look for it in the cached copy kept by the USB stack.
*
* NOTE2: We convert LE fields to CPU order.
*/
static int wa_fill_descr(struct wahc *wa)
{
int result;
struct device *dev = &wa->usb_iface->dev;
char *itr;
struct usb_device *usb_dev = wa->usb_dev;
struct usb_descriptor_header *hdr;
struct usb_wa_descriptor *wa_descr;
size_t itr_size, actconfig_idx;
actconfig_idx = (usb_dev->actconfig - usb_dev->config) /
sizeof(usb_dev->config[0]);
itr = usb_dev->rawdescriptors[actconfig_idx];
itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
while (itr_size >= sizeof(*hdr)) {
hdr = (struct usb_descriptor_header *) itr;
dev_dbg(dev, "Extra device descriptor: "
"type %02x/%u bytes @ %zu (%zu left)\n",
hdr->bDescriptorType, hdr->bLength,
(itr - usb_dev->rawdescriptors[actconfig_idx]),
itr_size);
if (hdr->bDescriptorType == USB_DT_WIRE_ADAPTER)
goto found;
itr += hdr->bLength;
itr_size -= hdr->bLength;
}
dev_err(dev, "cannot find Wire Adapter Class descriptor\n");
return -ENODEV;
found:
result = -EINVAL;
if (hdr->bLength > itr_size) { /* is it available? */
dev_err(dev, "incomplete Wire Adapter Class descriptor "
"(%zu bytes left, %u needed)\n",
itr_size, hdr->bLength);
goto error;
}
if (hdr->bLength < sizeof(*wa->wa_descr)) {
dev_err(dev, "short Wire Adapter Class descriptor\n");
goto error;
}
wa->wa_descr = wa_descr = (struct usb_wa_descriptor *) hdr;
/* Make LE fields CPU order */
wa_descr->bcdWAVersion = le16_to_cpu(wa_descr->bcdWAVersion);
wa_descr->wNumRPipes = le16_to_cpu(wa_descr->wNumRPipes);
wa_descr->wRPipeMaxBlock = le16_to_cpu(wa_descr->wRPipeMaxBlock);
if (wa_descr->bcdWAVersion > 0x0100)
dev_warn(dev, "Wire Adapter v%d.%d newer than groked v1.0\n",
wa_descr->bcdWAVersion & 0xff00 >> 8,
wa_descr->bcdWAVersion & 0x00ff);
result = 0;
error:
return result;
}
static struct hc_driver hwahc_hc_driver = {
.description = "hwa-hcd",
.product_desc = "Wireless USB HWA host controller",
.hcd_priv_size = sizeof(struct hwahc) - sizeof(struct usb_hcd),
.irq = NULL, /* FIXME */
.flags = HCD_USB2, /* FIXME */
.reset = hwahc_op_reset,
.start = hwahc_op_start,
.stop = hwahc_op_stop,
.get_frame_number = hwahc_op_get_frame_number,
.urb_enqueue = hwahc_op_urb_enqueue,
.urb_dequeue = hwahc_op_urb_dequeue,
.endpoint_disable = hwahc_op_endpoint_disable,
.hub_status_data = wusbhc_rh_status_data,
.hub_control = wusbhc_rh_control,
.bus_suspend = wusbhc_rh_suspend,
.bus_resume = wusbhc_rh_resume,
.start_port_reset = wusbhc_rh_start_port_reset,
};
static int hwahc_security_create(struct hwahc *hwahc)
{
int result;
struct wusbhc *wusbhc = &hwahc->wusbhc;
struct usb_device *usb_dev = hwahc->wa.usb_dev;
struct device *dev = &usb_dev->dev;
struct usb_security_descriptor *secd;
struct usb_encryption_descriptor *etd;
void *itr, *top;
size_t itr_size, needed, bytes;
u8 index;
char buf[64];
/* Find the host's security descriptors in the config descr bundle */
index = (usb_dev->actconfig - usb_dev->config) /
sizeof(usb_dev->config[0]);
itr = usb_dev->rawdescriptors[index];
itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
top = itr + itr_size;
result = __usb_get_extra_descriptor(usb_dev->rawdescriptors[index],
le16_to_cpu(usb_dev->actconfig->desc.wTotalLength),
USB_DT_SECURITY, (void **) &secd);
if (result == -1) {
dev_warn(dev, "BUG? WUSB host has no security descriptors\n");
return 0;
}
needed = sizeof(*secd);
if (top - (void *)secd < needed) {
dev_err(dev, "BUG? Not enough data to process security "
"descriptor header (%zu bytes left vs %zu needed)\n",
top - (void *) secd, needed);
return 0;
}
needed = le16_to_cpu(secd->wTotalLength);
if (top - (void *)secd < needed) {
dev_err(dev, "BUG? Not enough data to process security "
"descriptors (%zu bytes left vs %zu needed)\n",
top - (void *) secd, needed);
return 0;
}
/* Walk over the sec descriptors and store CCM1's on wusbhc */
itr = (void *) secd + sizeof(*secd);
top = (void *) secd + le16_to_cpu(secd->wTotalLength);
index = 0;
bytes = 0;
while (itr < top) {
etd = itr;
if (top - itr < sizeof(*etd)) {
dev_err(dev, "BUG: bad host security descriptor; "
"not enough data (%zu vs %zu left)\n",
top - itr, sizeof(*etd));
break;
}
if (etd->bLength < sizeof(*etd)) {
dev_err(dev, "BUG: bad host encryption descriptor; "
"descriptor is too short "
"(%zu vs %zu needed)\n",
(size_t)etd->bLength, sizeof(*etd));
break;
}
itr += etd->bLength;
bytes += snprintf(buf + bytes, sizeof(buf) - bytes,
"%s (0x%02x) ",
wusb_et_name(etd->bEncryptionType),
etd->bEncryptionValue);
wusbhc->ccm1_etd = etd;
}
dev_info(dev, "supported encryption types: %s\n", buf);
if (wusbhc->ccm1_etd == NULL) {
dev_err(dev, "E: host doesn't support CCM-1 crypto\n");
return 0;
}
/* Pretty print what we support */
return 0;
}
static void hwahc_security_release(struct hwahc *hwahc)
{
/* nothing to do here so far... */
}
static int hwahc_create(struct hwahc *hwahc, struct usb_interface *iface)
{
int result;
struct device *dev = &iface->dev;
struct wusbhc *wusbhc = &hwahc->wusbhc;
struct wahc *wa = &hwahc->wa;
struct usb_device *usb_dev = interface_to_usbdev(iface);
wa->usb_dev = usb_get_dev(usb_dev); /* bind the USB device */
wa->usb_iface = usb_get_intf(iface);
wusbhc->dev = dev;
wusbhc->uwb_rc = uwb_rc_get_by_grandpa(iface->dev.parent);
if (wusbhc->uwb_rc == NULL) {
result = -ENODEV;
dev_err(dev, "Cannot get associated UWB Host Controller\n");
goto error_rc_get;
}
result = wa_fill_descr(wa); /* Get the device descriptor */
if (result < 0)
goto error_fill_descriptor;
if (wa->wa_descr->bNumPorts > USB_MAXCHILDREN) {
dev_err(dev, "FIXME: USB_MAXCHILDREN too low for WUSB "
"adapter (%u ports)\n", wa->wa_descr->bNumPorts);
wusbhc->ports_max = USB_MAXCHILDREN;
} else {
wusbhc->ports_max = wa->wa_descr->bNumPorts;
}
wusbhc->mmcies_max = wa->wa_descr->bNumMMCIEs;
wusbhc->start = __hwahc_op_wusbhc_start;
wusbhc->stop = __hwahc_op_wusbhc_stop;
wusbhc->mmcie_add = __hwahc_op_mmcie_add;
wusbhc->mmcie_rm = __hwahc_op_mmcie_rm;
wusbhc->dev_info_set = __hwahc_op_dev_info_set;
wusbhc->bwa_set = __hwahc_op_bwa_set;
wusbhc->set_num_dnts = __hwahc_op_set_num_dnts;
wusbhc->set_ptk = __hwahc_op_set_ptk;
wusbhc->set_gtk = __hwahc_op_set_gtk;
result = hwahc_security_create(hwahc);
if (result < 0) {
dev_err(dev, "Can't initialize security: %d\n", result);
goto error_security_create;
}
wa->wusb = wusbhc; /* FIXME: ugly, need to fix */
result = wusbhc_create(&hwahc->wusbhc);
if (result < 0) {
dev_err(dev, "Can't create WUSB HC structures: %d\n", result);
goto error_wusbhc_create;
}
result = wa_create(&hwahc->wa, iface);
if (result < 0)
goto error_wa_create;
return 0;
error_wa_create:
wusbhc_destroy(&hwahc->wusbhc);
error_wusbhc_create:
/* WA Descr fill allocs no resources */
error_security_create:
error_fill_descriptor:
uwb_rc_put(wusbhc->uwb_rc);
error_rc_get:
usb_put_intf(iface);
usb_put_dev(usb_dev);
return result;
}
static void hwahc_destroy(struct hwahc *hwahc)
{
struct wusbhc *wusbhc = &hwahc->wusbhc;
mutex_lock(&wusbhc->mutex);
__wa_destroy(&hwahc->wa);
wusbhc_destroy(&hwahc->wusbhc);
hwahc_security_release(hwahc);
hwahc->wusbhc.dev = NULL;
uwb_rc_put(wusbhc->uwb_rc);
usb_put_intf(hwahc->wa.usb_iface);
usb_put_dev(hwahc->wa.usb_dev);
mutex_unlock(&wusbhc->mutex);
}
static void hwahc_init(struct hwahc *hwahc)
{
wa_init(&hwahc->wa);
}
static int hwahc_probe(struct usb_interface *usb_iface,
const struct usb_device_id *id)
{
int result;
struct usb_hcd *usb_hcd;
struct wusbhc *wusbhc;
struct hwahc *hwahc;
struct device *dev = &usb_iface->dev;
result = -ENOMEM;
usb_hcd = usb_create_hcd(&hwahc_hc_driver, &usb_iface->dev, "wusb-hwa");
if (usb_hcd == NULL) {
dev_err(dev, "unable to allocate instance\n");
goto error_alloc;
}
usb_hcd->wireless = 1;
set_bit(HCD_FLAG_SAW_IRQ, &usb_hcd->flags);
wusbhc = usb_hcd_to_wusbhc(usb_hcd);
hwahc = container_of(wusbhc, struct hwahc, wusbhc);
hwahc_init(hwahc);
result = hwahc_create(hwahc, usb_iface);
if (result < 0) {
dev_err(dev, "Cannot initialize internals: %d\n", result);
goto error_hwahc_create;
}
result = usb_add_hcd(usb_hcd, 0, 0);
if (result < 0) {
dev_err(dev, "Cannot add HCD: %d\n", result);
goto error_add_hcd;
}
result = wusbhc_b_create(&hwahc->wusbhc);
if (result < 0) {
dev_err(dev, "Cannot setup phase B of WUSBHC: %d\n", result);
goto error_wusbhc_b_create;
}
return 0;
error_wusbhc_b_create:
usb_remove_hcd(usb_hcd);
error_add_hcd:
hwahc_destroy(hwahc);
error_hwahc_create:
usb_put_hcd(usb_hcd);
error_alloc:
return result;
}
static void hwahc_disconnect(struct usb_interface *usb_iface)
{
struct usb_hcd *usb_hcd;
struct wusbhc *wusbhc;
struct hwahc *hwahc;
usb_hcd = usb_get_intfdata(usb_iface);
wusbhc = usb_hcd_to_wusbhc(usb_hcd);
hwahc = container_of(wusbhc, struct hwahc, wusbhc);
wusbhc_b_destroy(&hwahc->wusbhc);
usb_remove_hcd(usb_hcd);
hwahc_destroy(hwahc);
usb_put_hcd(usb_hcd);
}
static struct usb_device_id hwahc_id_table[] = {
/* FIXME: use class labels for this */
{ USB_INTERFACE_INFO(0xe0, 0x02, 0x01), },
{},
};
MODULE_DEVICE_TABLE(usb, hwahc_id_table);
static struct usb_driver hwahc_driver = {
.name = "hwa-hc",
.probe = hwahc_probe,
.disconnect = hwahc_disconnect,
.id_table = hwahc_id_table,
};
static int __init hwahc_driver_init(void)
{
return usb_register(&hwahc_driver);
}
module_init(hwahc_driver_init);
static void __exit hwahc_driver_exit(void)
{
usb_deregister(&hwahc_driver);
}
module_exit(hwahc_driver_exit);
MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
MODULE_DESCRIPTION("Host Wired Adapter USB Host Control Driver");
MODULE_LICENSE("GPL");