wusb: add HWA host controller driver
Add a driver for Wireless USB host controllers connected via USB (a Host Wire Adapter or HWA). Signed-off-by: David Vrabel <david.vrabel@csr.com>
This commit is contained in:
Inaky Perez-Gonzalez
David Vrabel
parent
df3654236e
commit
d09318b8ab
4 changed files with 941 additions and 0 deletions
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@ -16,6 +16,7 @@ obj-$(CONFIG_USB_UHCI_HCD) += host/
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obj-$(CONFIG_USB_SL811_HCD) += host/
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obj-$(CONFIG_USB_SL811_HCD) += host/
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obj-$(CONFIG_USB_U132_HCD) += host/
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obj-$(CONFIG_USB_U132_HCD) += host/
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obj-$(CONFIG_USB_R8A66597_HCD) += host/
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obj-$(CONFIG_USB_R8A66597_HCD) += host/
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obj-$(CONFIG_USB_HWA_HCD) += host/
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obj-$(CONFIG_USB_C67X00_HCD) += c67x00/
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obj-$(CONFIG_USB_C67X00_HCD) += c67x00/
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@ -317,3 +317,17 @@ config USB_WHCI_HCD
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To compile this driver a module, choose M here: the module
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To compile this driver a module, choose M here: the module
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will be called "whci-hcd".
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will be called "whci-hcd".
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config USB_HWA_HCD
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tristate "Host Wire Adapter (HWA) driver"
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depends on USB
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select USB_WUSB
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select UWB_HWA
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help
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This driver enables you to connect Wireless USB devices to
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your system using a Host Wire Adaptor USB dongle. This is an
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UWB Radio Controller and WUSB Host Controller connected to
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your machine via USB (specified in WUSB1.0).
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To compile this driver a module, choose M here: the module
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will be called "hwa-hc".
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@ -21,3 +21,4 @@ obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
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obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
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obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
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obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
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obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
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obj-$(CONFIG_USB_ISP1760_HCD) += isp1760.o
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obj-$(CONFIG_USB_ISP1760_HCD) += isp1760.o
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obj-$(CONFIG_USB_HWA_HCD) += hwa-hc.o
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925
drivers/usb/host/hwa-hc.c
Normal file
925
drivers/usb/host/hwa-hc.c
Normal file
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@ -0,0 +1,925 @@
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/*
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* Host Wire Adapter:
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* Driver glue, HWA-specific functions, bridges to WAHC and WUSBHC
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*
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* Copyright (C) 2005-2006 Intel Corporation
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*
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* The HWA driver is a simple layer that forwards requests to the WAHC
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* (Wire Adater Host Controller) or WUSBHC (Wireless USB Host
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* Controller) layers.
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*
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* Host Wire Adapter is the 'WUSB 1.0 standard' name for Wireless-USB
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* Host Controller that is connected to your system via USB (a USB
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* dongle that implements a USB host...). There is also a Device Wired
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* Adaptor, DWA (Wireless USB hub) that uses the same mechanism for
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* transferring data (it is after all a USB host connected via
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* Wireless USB), we have a common layer called Wire Adapter Host
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* Controller that does all the hard work. The WUSBHC (Wireless USB
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* Host Controller) is the part common to WUSB Host Controllers, the
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* HWA and the PCI-based one, that is implemented following the WHCI
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* spec. All these layers are implemented in ../wusbcore.
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*
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* The main functions are hwahc_op_urb_{en,de}queue(), that pass the
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* job of converting a URB to a Wire Adapter
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*
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* Entry points:
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*
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* hwahc_driver_*() Driver initialization, registration and
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* teardown.
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*
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* hwahc_probe() New device came up, create an instance for
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* it [from device enumeration].
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*
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* hwahc_disconnect() Remove device instance [from device
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* enumeration].
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*
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* [__]hwahc_op_*() Host-Wire-Adaptor specific functions for
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* starting/stopping/etc (some might be made also
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* DWA).
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*/
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#include <linux/kernel.h>
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#include <linux/version.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/workqueue.h>
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#include <linux/wait.h>
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#include <linux/completion.h>
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#include "../wusbcore/wa-hc.h"
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#include "../wusbcore/wusbhc.h"
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#define D_LOCAL 0
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#include <linux/uwb/debug.h>
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struct hwahc {
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struct wusbhc wusbhc; /* has to be 1st */
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struct wahc wa;
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u8 buffer[16]; /* for misc usb transactions */
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};
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/**
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* FIXME should be wusbhc
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*
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* NOTE: we need to cache the Cluster ID because later...there is no
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* way to get it :)
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*/
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static int __hwahc_set_cluster_id(struct hwahc *hwahc, u8 cluster_id)
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{
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int result;
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struct wusbhc *wusbhc = &hwahc->wusbhc;
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struct wahc *wa = &hwahc->wa;
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struct device *dev = &wa->usb_iface->dev;
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result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
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WUSB_REQ_SET_CLUSTER_ID,
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USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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cluster_id,
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wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
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NULL, 0, 1000 /* FIXME: arbitrary */);
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if (result < 0)
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dev_err(dev, "Cannot set WUSB Cluster ID to 0x%02x: %d\n",
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cluster_id, result);
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else
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wusbhc->cluster_id = cluster_id;
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dev_info(dev, "Wireless USB Cluster ID set to 0x%02x\n", cluster_id);
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return result;
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}
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static int __hwahc_op_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
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{
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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struct wahc *wa = &hwahc->wa;
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return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
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WUSB_REQ_SET_NUM_DNTS,
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USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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interval << 8 | slots,
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wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
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NULL, 0, 1000 /* FIXME: arbitrary */);
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}
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/*
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* Reset a WUSB host controller and wait for it to complete doing it.
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*
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* @usb_hcd: Pointer to WUSB Host Controller instance.
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*
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*/
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static int hwahc_op_reset(struct usb_hcd *usb_hcd)
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{
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int result;
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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struct device *dev = &hwahc->wa.usb_iface->dev;
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d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
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mutex_lock(&wusbhc->mutex);
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wa_nep_disarm(&hwahc->wa);
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result = __wa_set_feature(&hwahc->wa, WA_RESET);
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if (result < 0) {
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dev_err(dev, "error commanding HC to reset: %d\n", result);
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goto error_unlock;
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}
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d_printf(3, dev, "reset: waiting for device to change state\n");
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result = __wa_wait_status(&hwahc->wa, WA_STATUS_RESETTING, 0);
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if (result < 0) {
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dev_err(dev, "error waiting for HC to reset: %d\n", result);
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goto error_unlock;
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}
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error_unlock:
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mutex_unlock(&wusbhc->mutex);
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d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
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return result;
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}
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/*
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* FIXME: break this function up
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*/
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static int hwahc_op_start(struct usb_hcd *usb_hcd)
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{
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u8 addr;
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int result;
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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struct device *dev = &hwahc->wa.usb_iface->dev;
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/* Set up a Host Info WUSB Information Element */
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d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
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result = -ENOSPC;
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mutex_lock(&wusbhc->mutex);
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/* Start the numbering from the top so that the bottom
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* range of the unauth addr space is used for devices,
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* the top for HCs; use 0xfe - RC# */
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addr = wusb_cluster_id_get();
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if (addr == 0)
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goto error_cluster_id_get;
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result = __hwahc_set_cluster_id(hwahc, addr);
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if (result < 0)
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goto error_set_cluster_id;
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result = wa_nep_arm(&hwahc->wa, GFP_KERNEL);
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if (result < 0) {
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dev_err(dev, "cannot listen to notifications: %d\n", result);
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goto error_stop;
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}
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usb_hcd->uses_new_polling = 1;
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usb_hcd->poll_rh = 1;
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usb_hcd->state = HC_STATE_RUNNING;
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result = 0;
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out:
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mutex_unlock(&wusbhc->mutex);
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d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
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return result;
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error_stop:
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__wa_stop(&hwahc->wa);
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error_set_cluster_id:
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wusb_cluster_id_put(wusbhc->cluster_id);
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error_cluster_id_get:
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goto out;
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}
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/*
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* FIXME: break this function up
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*/
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static int __hwahc_op_wusbhc_start(struct wusbhc *wusbhc)
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{
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int result;
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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struct device *dev = &hwahc->wa.usb_iface->dev;
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/* Set up a Host Info WUSB Information Element */
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d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
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result = -ENOSPC;
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result = __wa_set_feature(&hwahc->wa, WA_ENABLE);
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if (result < 0) {
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dev_err(dev, "error commanding HC to start: %d\n", result);
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goto error_stop;
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}
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result = __wa_wait_status(&hwahc->wa, WA_ENABLE, WA_ENABLE);
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if (result < 0) {
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dev_err(dev, "error waiting for HC to start: %d\n", result);
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goto error_stop;
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}
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result = 0;
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out:
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d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
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return result;
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error_stop:
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result = __wa_clear_feature(&hwahc->wa, WA_ENABLE);
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goto out;
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}
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static int hwahc_op_suspend(struct usb_hcd *usb_hcd, pm_message_t msg)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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dev_err(wusbhc->dev, "%s (%p [%p], 0x%lx) UNIMPLEMENTED\n", __func__,
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usb_hcd, hwahc, *(unsigned long *) &msg);
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return -ENOSYS;
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}
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static int hwahc_op_resume(struct usb_hcd *usb_hcd)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
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usb_hcd, hwahc);
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return -ENOSYS;
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}
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static void __hwahc_op_wusbhc_stop(struct wusbhc *wusbhc)
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{
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int result;
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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struct device *dev = &hwahc->wa.usb_iface->dev;
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d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
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/* Nothing for now */
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d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
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return;
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}
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/*
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* No need to abort pipes, as when this is called, all the children
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* has been disconnected and that has done it [through
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* usb_disable_interface() -> usb_disable_endpoint() ->
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* hwahc_op_ep_disable() - >rpipe_ep_disable()].
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*/
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static void hwahc_op_stop(struct usb_hcd *usb_hcd)
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{
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int result;
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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struct wahc *wa = &hwahc->wa;
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struct device *dev = &wa->usb_iface->dev;
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d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
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mutex_lock(&wusbhc->mutex);
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wusbhc_stop(wusbhc);
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wa_nep_disarm(&hwahc->wa);
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result = __wa_stop(&hwahc->wa);
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wusb_cluster_id_put(wusbhc->cluster_id);
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mutex_unlock(&wusbhc->mutex);
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d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
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return;
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}
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static int hwahc_op_get_frame_number(struct usb_hcd *usb_hcd)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
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dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
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usb_hcd, hwahc);
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return -ENOSYS;
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}
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static int hwahc_op_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
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gfp_t gfp)
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{
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||||||
|
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);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 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 */);
|
||||||
|
|
||||||
|
memset(keyd, 0, sizeof(*keyd)); /* clear keys etc. */
|
||||||
|
kfree(keyd);
|
||||||
|
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;
|
||||||
|
d_printf(3, 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,
|
||||||
|
.pci_suspend = hwahc_op_suspend,
|
||||||
|
.pci_resume = hwahc_op_resume,
|
||||||
|
.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;
|
||||||
|
|
||||||
|
d_fnstart(1, NULL, "(hwahc %p)\n", hwahc);
|
||||||
|
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);
|
||||||
|
d_fnend(1, NULL, "(hwahc %p) = void\n", hwahc);
|
||||||
|
}
|
||||||
|
|
||||||
|
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;
|
||||||
|
|
||||||
|
d_fnstart(4, dev, "(%p, %p)\n", usb_iface, id);
|
||||||
|
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;
|
||||||
|
usb_hcd->flags |= HCD_FLAG_SAW_IRQ;
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
d_fnend(4, dev, "(%p, %p) = 0\n", usb_iface, id);
|
||||||
|
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:
|
||||||
|
d_fnend(4, dev, "(%p, %p) = %d\n", usb_iface, id, result);
|
||||||
|
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);
|
||||||
|
|
||||||
|
d_fnstart(1, NULL, "(hwahc %p [usb_iface %p])\n", hwahc, usb_iface);
|
||||||
|
wusbhc_b_destroy(&hwahc->wusbhc);
|
||||||
|
usb_remove_hcd(usb_hcd);
|
||||||
|
hwahc_destroy(hwahc);
|
||||||
|
usb_put_hcd(usb_hcd);
|
||||||
|
d_fnend(1, NULL, "(hwahc %p [usb_iface %p]) = void\n", hwahc,
|
||||||
|
usb_iface);
|
||||||
|
}
|
||||||
|
|
||||||
|
/** USB device ID's that we handle */
|
||||||
|
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)
|
||||||
|
{
|
||||||
|
int result;
|
||||||
|
result = usb_register(&hwahc_driver);
|
||||||
|
if (result < 0) {
|
||||||
|
printk(KERN_ERR "WA-CDS: Cannot register USB driver: %d\n",
|
||||||
|
result);
|
||||||
|
goto error_usb_register;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
error_usb_register:
|
||||||
|
return result;
|
||||||
|
|
||||||
|
}
|
||||||
|
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");
|
||||||
Loading…
Reference in a new issue