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提交 9779a832 编写于 作者: L Linus Torvalds
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Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb 

* 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb: (47 commits)
  uwb: wrong sizeof argument in mac address compare
  uwb: don't use printk_ratelimit() so often
  uwb: use kcalloc where appropriate
  uwb: use time_after() when purging stale beacons
  uwb: add credits for the original developers of the UWB/WUSB/WLP subsystems
  uwb: add entries in the MAINTAINERS file
  uwb: depend on EXPERIMENTAL
  wusb: wusb-cbaf (CBA driver) sysfs ABI simplification
  uwb: document UWB and WUSB sysfs files
  uwb: add symlinks in sysfs between radio controllers and PALs
  uwb: dont tranmit identification IEs
  uwb: i1480/GUWA100U: fix firmware download issues
  uwb: i1480: remove MAC/PHY information checking function
  uwb: add Intel i1480 HWA to the UWB RC quirk table
  uwb: disable command/event filtering for D-Link DUB-1210
  uwb: initialize the debug sub-system
  uwb: Fix handling IEs with empty IE data in uwb_est_get_size()
  wusb: fix bmRequestType for Abort RPipe request
  wusb: fix error path for wusb_set_dev_addr()
  wusb: add HWA host controller driver
  ...
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浏览文件 @ 9779a832
......@@ -598,6 +598,11 @@ S: Tamsui town, Taipei county,
S: Taiwan 251
S: Republic of China
N: Reinette Chatre
E: reinette.chatre@intel.com
D: WiMedia Link Protocol implementation
D: UWB stack bits and pieces
N: Michael Elizabeth Chastain
E: mec@shout.net
D: Configure, Menuconfig, xconfig
......@@ -2695,6 +2700,12 @@ S: Demonstratsii 8-382
S: Tula 300000
S: Russia
N: Inaky Perez-Gonzalez
E: inaky.perez-gonzalez@intel.com
D: UWB stack, HWA-RC driver and HWA-HC drivers
D: Wireless USB additions to the USB stack
D: WiMedia Link Protocol bits and pieces
N: Gordon Peters
E: GordPeters@smarttech.com
D: Isochronous receive for IEEE 1394 driver (OHCI module).
......
Documentation/ABI/testing/sysfs-bus-umc 0 → 100644
浏览文件 @ 9779a832
What: /sys/bus/umc/
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
The Wireless Host Controller Interface (WHCI)
specification describes a PCI-based device with
multiple capabilities; the UWB Multi-interface
Controller (UMC).
The umc bus presents each of the individual
capabilties as a device.
What: /sys/bus/umc/devices/.../capability_id
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
The ID of this capability, with 0 being the radio
controller capability.
What: /sys/bus/umc/devices/.../version
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
The specification version this capability's hardware
interface complies with.
Documentation/ABI/testing/sysfs-bus-usb
浏览文件 @ 9779a832
......@@ -101,3 +101,46 @@ Description:
Users:
USB PM tool
git://git.moblin.org/users/sarah/usb-pm-tool/
What: /sys/bus/usb/device/.../authorized
Date: July 2008
KernelVersion: 2.6.26
Contact: David Vrabel <david.vrabel@csr.com>
Description:
Authorized devices are available for use by device
drivers, non-authorized one are not. By default, wired
USB devices are authorized.
Certified Wireless USB devices are not authorized
initially and should be (by writing 1) after the
device has been authenticated.
What: /sys/bus/usb/device/.../wusb_cdid
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
For Certified Wireless USB devices only.
A devices's CDID, as 16 space-separated hex octets.
What: /sys/bus/usb/device/.../wusb_ck
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
For Certified Wireless USB devices only.
Write the device's connection key (CK) to start the
authentication of the device. The CK is 16
space-separated hex octets.
What: /sys/bus/usb/device/.../wusb_disconnect
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
For Certified Wireless USB devices only.
Write a 1 to force the device to disconnect
(equivalent to unplugging a wired USB device).
Documentation/ABI/testing/sysfs-class-usb_host 0 → 100644
浏览文件 @ 9779a832
What: /sys/class/usb_host/usb_hostN/wusb_chid
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
Write the CHID (16 space-separated hex octets) for this host controller.
This starts the host controller, allowing it to accept connection from
WUSB devices.
Set an all zero CHID to stop the host controller.
What: /sys/class/usb_host/usb_hostN/wusb_trust_timeout
Date: July 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
Devices that haven't sent a WUSB packet to the host
within 'wusb_trust_timeout' ms are considered to have
disconnected and are removed. The default value of
4000 ms is the value required by the WUSB
specification.
Since this relates to security (specifically, the
lifetime of PTKs and GTKs) it should not be changed
from the default.
Documentation/ABI/testing/sysfs-class-uwb_rc 0 → 100644
浏览文件 @ 9779a832
What: /sys/class/uwb_rc
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
Interfaces for WiMedia Ultra Wideband Common Radio
Platform (UWB) radio controllers.
Familiarity with the ECMA-368 'High Rate Ultra
Wideband MAC and PHY Specification' is assumed.
What: /sys/class/uwb_rc/beacon_timeout_ms
Date: July 2008
KernelVersion: 2.6.27
Description:
If no beacons are received from a device for at least
this time, the device will be considered to have gone
and it will be removed. The default is 3 superframes
(~197 ms) as required by the specification.
What: /sys/class/uwb_rc/uwbN/
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
An individual UWB radio controller.
What: /sys/class/uwb_rc/uwbN/beacon
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
Write:
<channel> [<bpst offset>]
to start beaconing on a specific channel, or stop
beaconing if <channel> is -1. Valid channels depends
on the radio controller's supported band groups.
<bpst offset> may be used to try and join a specific
beacon group if more than one was found during a scan.
What: /sys/class/uwb_rc/uwbN/scan
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
Write:
<channel> <type> [<bpst offset>]
to start (or stop) scanning on a channel. <type> is one of:
0 - scan
1 - scan outside BP
2 - scan while inactive
3 - scanning disabled
4 - scan (with start time of <bpst offset>)
What: /sys/class/uwb_rc/uwbN/mac_address
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
The EUI-48, in colon-separated hex octets, for this
radio controller. A write will change the radio
controller's EUI-48 but only do so while the device is
not beaconing or scanning.
What: /sys/class/uwb_rc/uwbN/wusbhc
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
A symlink to the device (if any) of the WUSB Host
Controller PAL using this radio controller.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
A neighbour UWB device that has either been detected
as part of a scan or is a member of the radio
controllers beacon group.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/BPST
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
The time (using the radio controllers internal 1 ms
interval superframe timer) of the last beacon from
this device was received.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/DevAddr
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
The current DevAddr of this device in colon separated
hex octets.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/EUI_48
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
The EUI-48 of this device in colon separated hex
octets.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/BPST
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
What: /sys/class/uwb_rc/uwbN/<EUI-48>/IEs
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
The latest IEs included in this device's beacon, in
space separated hex octets with one IE per line.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/LQE
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
Link Quality Estimate - the Signal to Noise Ratio
(SNR) of all packets received from this device in dB.
This gives an estimate on a suitable PHY rate. Refer
to [ECMA-368] section 13.3 for more details.
What: /sys/class/uwb_rc/uwbN/<EUI-48>/RSSI
Date: July 2008
KernelVersion: 2.6.27
Contact: linux-usb@vger.kernel.org
Description:
Received Signal Strength Indication - the strength of
the received signal in dB. LQE is a more useful
measure of the radio link quality.
Documentation/ABI/testing/sysfs-wusb_cbaf 0 → 100644
浏览文件 @ 9779a832
What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_*
Date: August 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
Various files for managing Cable Based Association of
(wireless) USB devices.
The sequence of operations should be:
1. Device is plugged in.
2. The connection manager (CM) sees a device with CBA capability.
(the wusb_chid etc. files in /sys/devices/blah/OURDEVICE).
3. The CM writes the host name, supported band groups,
and the CHID (host ID) into the wusb_host_name,
wusb_host_band_groups and wusb_chid files. These
get sent to the device and the CDID (if any) for
this host is requested.
4. The CM can verify that the device's supported band
groups (wusb_device_band_groups) are compatible
with the host.
5. The CM reads the wusb_cdid file.
6. The CM looks it up its database.
- If it has a matching CHID,CDID entry, the device
has been authorized before and nothing further
needs to be done.
- If the CDID is zero (or the CM doesn't find a
matching CDID in its database), the device is
assumed to be not known. The CM may associate
the host with device by: writing a randomly
generated CDID to wusb_cdid and then a random CK
to wusb_ck (this uploads the new CC to the
device).
CMD may choose to prompt the user before
associating with a new device.
7. Device is unplugged.
References:
[WUSB-AM] Association Models Supplement to the
Certified Wireless Universal Serial Bus
Specification, version 1.0.
What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_chid
Date: August 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
The CHID of the host formatted as 16 space-separated
hex octets.
Writes fetches device's supported band groups and the
the CDID for any existing association with this host.
What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_host_name
Date: August 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
A friendly name for the host as a UTF-8 encoded string.
What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_host_band_groups
Date: August 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
The band groups supported by the host, in the format
defined in [WUSB-AM].
What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_device_band_groups
Date: August 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
The band groups supported by the device, in the format
defined in [WUSB-AM].
What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_cdid
Date: August 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
The device's CDID formatted as 16 space-separated hex
octets.
What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_ck
Date: August 2008
KernelVersion: 2.6.27
Contact: David Vrabel <david.vrabel@csr.com>
Description:
Write 16 space-separated random, hex octets to
associate with the device.
Documentation/usb/WUSB-Design-overview.txt 0 → 100644
浏览文件 @ 9779a832
Linux UWB + Wireless USB + WiNET
(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.
Please visit http://bughost.org/thewiki/Design-overview.txt-1.8 for
updated content.
* Design-overview.txt-1.8
This code implements a Ultra Wide Band stack for Linux, as well as
drivers for the the USB based UWB radio controllers defined in the
Wireless USB 1.0 specification (including Wireless USB host controller
and an Intel WiNET controller).
1. Introduction
1. HWA: Host Wire adapters, your Wireless USB dongle
2. DWA: Device Wired Adaptor, a Wireless USB hub for wired
devices
3. WHCI: Wireless Host Controller Interface, the PCI WUSB host
adapter
2. The UWB stack
1. Devices and hosts: the basic structure
2. Host Controller life cycle
3. On the air: beacons and enumerating the radio neighborhood
4. Device lists
5. Bandwidth allocation
3. Wireless USB Host Controller drivers
4. Glossary
Introduction
UWB is a wide-band communication protocol that is to serve also as the
low-level protocol for others (much like TCP sits on IP). Currently
these others are Wireless USB and TCP/IP, but seems Bluetooth and
Firewire/1394 are coming along.
UWB uses a band from roughly 3 to 10 GHz, transmitting at a max of
~-41dB (or 0.074 uW/MHz--geography specific data is still being
negotiated w/ regulators, so watch for changes). That band is divided in
a bunch of ~1.5 GHz wide channels (or band groups) composed of three
subbands/subchannels (528 MHz each). Each channel is independent of each
other, so you could consider them different "busses". Initially this
driver considers them all a single one.
Radio time is divided in 65536 us long /superframes/, each one divided
in 256 256us long /MASs/ (Media Allocation Slots), which are the basic
time/media allocation units for transferring data. At the beginning of
each superframe there is a Beacon Period (BP), where every device
transmit its beacon on a single MAS. The length of the BP depends on how
many devices are present and the length of their beacons.
Devices have a MAC (fixed, 48 bit address) and a device (changeable, 16
bit address) and send periodic beacons to advertise themselves and pass
info on what they are and do. They advertise their capabilities and a
bunch of other stuff.
The different logical parts of this driver are:
*
*UWB*: the Ultra-Wide-Band stack -- manages the radio and
associated spectrum to allow for devices sharing it. Allows to
control bandwidth assingment, beaconing, scanning, etc
*
*WUSB*: the layer that sits on top of UWB to provide Wireless USB.
The Wireless USB spec defines means to control a UWB radio and to
do the actual WUSB.
HWA: Host Wire adapters, your Wireless USB dongle
WUSB also defines a device called a Host Wire Adaptor (HWA), which in
mere terms is a USB dongle that enables your PC to have UWB and Wireless
USB. The Wireless USB Host Controller in a HWA looks to the host like a
[Wireless] USB controller connected via USB (!)
The HWA itself is broken in two or three main interfaces:
*
*RC*: Radio control -- this implements an interface to the
Ultra-Wide-Band radio controller. The driver for this implements a
USB-based UWB Radio Controller to the UWB stack.
*
*HC*: the wireless USB host controller. It looks like a USB host
whose root port is the radio and the WUSB devices connect to it.
To the system it looks like a separate USB host. The driver (will)
implement a USB host controller (similar to UHCI, OHCI or EHCI)
for which the root hub is the radio...To reiterate: it is a USB
controller that is connected via USB instead of PCI.
*
*WINET*: some HW provide a WiNET interface (IP over UWB). This
package provides a driver for it (it looks like a network
interface, winetX). The driver detects when there is a link up for
their type and kick into gear.
DWA: Device Wired Adaptor, a Wireless USB hub for wired devices
These are the complement to HWAs. They are a USB host for connecting
wired devices, but it is connected to your PC connected via Wireless
USB. To the system it looks like yet another USB host. To the untrained
eye, it looks like a hub that connects upstream wirelessly.
We still offer no support for this; however, it should share a lot of
code with the HWA-RC driver; there is a bunch of factorization work that
has been done to support that in upcoming releases.
WHCI: Wireless Host Controller Interface, the PCI WUSB host adapter
This is your usual PCI device that implements WHCI. Similar in concept
to EHCI, it allows your wireless USB devices (including DWAs) to connect
to your host via a PCI interface. As in the case of the HWA, it has a
Radio Control interface and the WUSB Host Controller interface per se.
There is still no driver support for this, but will be in upcoming
releases.
The UWB stack
The main mission of the UWB stack is to keep a tally of which devices
are in radio proximity to allow drivers to connect to them. As well, it
provides an API for controlling the local radio controllers (RCs from
now on), such as to start/stop beaconing, scan, allocate bandwidth, etc.
Devices and hosts: the basic structure
The main building block here is the UWB device (struct uwb_dev). For
each device that pops up in radio presence (ie: the UWB host receives a
beacon from it) you get a struct uwb_dev that will show up in
/sys/class/uwb and in /sys/bus/uwb/devices.
For each RC that is detected, a new struct uwb_rc is created. In turn, a
RC is also a device, so they also show in /sys/class/uwb and
/sys/bus/uwb/devices, but at the same time, only radio controllers show
up in /sys/class/uwb_rc.
*
[*] The reason for RCs being also devices is that not only we can
see them while enumerating the system device tree, but also on the
radio (their beacons and stuff), so the handling has to be
likewise to that of a device.
Each RC driver is implemented by a separate driver that plugs into the
interface that the UWB stack provides through a struct uwb_rc_ops. The
spec creators have been nice enough to make the message format the same
for HWA and WHCI RCs, so the driver is really a very thin transport that
moves the requests from the UWB API to the device [/uwb_rc_ops->cmd()/]
and sends the replies and notifications back to the API
[/uwb_rc_neh_grok()/]. Notifications are handled to the UWB daemon, that
is chartered, among other things, to keep the tab of how the UWB radio
neighborhood looks, creating and destroying devices as they show up or
dissapear.
Command execution is very simple: a command block is sent and a event
block or reply is expected back. For sending/receiving command/events, a
handle called /neh/ (Notification/Event Handle) is opened with
/uwb_rc_neh_open()/.
The HWA-RC (USB dongle) driver (drivers/uwb/hwa-rc.c) does this job for
the USB connected HWA. Eventually, drivers/whci-rc.c will do the same
for the PCI connected WHCI controller.
Host Controller life cycle
So let's say we connect a dongle to the system: it is detected and
firmware uploaded if needed [for Intel's i1480
/drivers/uwb/ptc/usb.c:ptc_usb_probe()/] and then it is reenumerated.
Now we have a real HWA device connected and
/drivers/uwb/hwa-rc.c:hwarc_probe()/ picks it up, that will set up the
Wire-Adaptor environment and then suck it into the UWB stack's vision of
the world [/drivers/uwb/lc-rc.c:uwb_rc_add()/].
*
[*] The stack should put a new RC to scan for devices
[/uwb_rc_scan()/] so it finds what's available around and tries to
connect to them, but this is policy stuff and should be driven
from user space. As of now, the operator is expected to do it
manually; see the release notes for documentation on the procedure.
When a dongle is disconnected, /drivers/uwb/hwa-rc.c:hwarc_disconnect()/
takes time of tearing everything down safely (or not...).
On the air: beacons and enumerating the radio neighborhood
So assuming we have devices and we have agreed for a channel to connect
on (let's say 9), we put the new RC to beacon:
*
$ echo 9 0 > /sys/class/uwb_rc/uwb0/beacon
Now it is visible. If there were other devices in the same radio channel
and beacon group (that's what the zero is for), the dongle's radio
control interface will send beacon notifications on its
notification/event endpoint (NEEP). The beacon notifications are part of
the event stream that is funneled into the API with
/drivers/uwb/neh.c:uwb_rc_neh_grok()/ and delivered to the UWBD, the UWB
daemon through a notification list.
UWBD wakes up and scans the event list; finds a beacon and adds it to
the BEACON CACHE (/uwb_beca/). If he receives a number of beacons from
the same device, he considers it to be 'onair' and creates a new device
[/drivers/uwb/lc-dev.c:uwbd_dev_onair()/]. Similarly, when no beacons
are received in some time, the device is considered gone and wiped out
[uwbd calls periodically /uwb/beacon.c:uwb_beca_purge()/ that will purge
the beacon cache of dead devices].
Device lists
All UWB devices are kept in the list of the struct bus_type uwb_bus.
Bandwidth allocation
The UWB stack maintains a local copy of DRP availability through
processing of incoming *DRP Availability Change* notifications. This
local copy is currently used to present the current bandwidth
availability to the user through the sysfs file
/sys/class/uwb_rc/uwbx/bw_avail. In the future the bandwidth
availability information will be used by the bandwidth reservation
routines.
The bandwidth reservation routines are in progress and are thus not
present in the current release. When completed they will enable a user
to initiate DRP reservation requests through interaction with sysfs. DRP
reservation requests from remote UWB devices will also be handled. The
bandwidth management done by the UWB stack will include callbacks to the
higher layers will enable the higher layers to use the reservations upon
completion. [Note: The bandwidth reservation work is in progress and
subject to change.]
Wireless USB Host Controller drivers
*WARNING* This section needs a lot of work!
As explained above, there are three different types of HCs in the WUSB
world: HWA-HC, DWA-HC and WHCI-HC.
HWA-HC and DWA-HC share that they are Wire-Adapters (USB or WUSB
connected controllers), and their transfer management system is almost
identical. So is their notification delivery system.
HWA-HC and WHCI-HC share that they are both WUSB host controllers, so
they have to deal with WUSB device life cycle and maintenance, wireless
root-hub
HWA exposes a Host Controller interface (HWA-HC 0xe0/02/02). This has
three endpoints (Notifications, Data Transfer In and Data Transfer
Out--known as NEP, DTI and DTO in the code).
We reserve UWB bandwidth for our Wireless USB Cluster, create a Cluster
ID and tell the HC to use all that. Then we start it. This means the HC
starts sending MMCs.
*
The MMCs are blocks of data defined somewhere in the WUSB1.0 spec
that define a stream in the UWB channel time allocated for sending
WUSB IEs (host to device commands/notifications) and Device
Notifications (device initiated to host). Each host defines a
unique Wireless USB cluster through MMCs. Devices can connect to a
single cluster at the time. The IEs are Information Elements, and
among them are the bandwidth allocations that tell each device
when can they transmit or receive.
Now it all depends on external stimuli.
*New device connection*
A new device pops up, it scans the radio looking for MMCs that give out
the existence of Wireless USB channels. Once one (or more) are found,
selects which one to connect to. Sends a /DN_Connect/ (device
notification connect) during the DNTS (Device Notification Time
Slot--announced in the MMCs
HC picks the /DN_Connect/ out (nep module sends to notif.c for delivery
into /devconnect/). This process starts the authentication process for
the device. First we allocate a /fake port/ and assign an
unauthenticated address (128 to 255--what we really do is
0x80 | fake_port_idx). We fiddle with the fake port status and /khubd/
sees a new connection, so he moves on to enable the fake port with a reset.
So now we are in the reset path -- we know we have a non-yet enumerated
device with an unauthorized address; we ask user space to authenticate
(FIXME: not yet done, similar to bluetooth pairing), then we do the key
exchange (FIXME: not yet done) and issue a /set address 0/ to bring the
device to the default state. Device is authenticated.
From here, the USB stack takes control through the usb_hcd ops. khubd
has seen the port status changes, as we have been toggling them. It will
start enumerating and doing transfers through usb_hcd->urb_enqueue() to
read descriptors and move our data.
*Device life cycle and keep alives*
Everytime there is a succesful transfer to/from a device, we update a
per-device activity timestamp. If not, every now and then we check and
if the activity timestamp gets old, we ping the device by sending it a
Keep Alive IE; it responds with a /DN_Alive/ pong during the DNTS (this
arrives to us as a notification through
devconnect.c:wusb_handle_dn_alive(). If a device times out, we
disconnect it from the system (cleaning up internal information and
toggling the bits in the fake hub port, which kicks khubd into removing
the rest of the stuff).
This is done through devconnect:__wusb_check_devs(), which will scan the
device list looking for whom needs refreshing.
If the device wants to disconnect, it will either die (ugly) or send a
/DN_Disconnect/ that will prompt a disconnection from the system.
*Sending and receiving data*
Data is sent and received through /Remote Pipes/ (rpipes). An rpipe is
/aimed/ at an endpoint in a WUSB device. This is the same for HWAs and
DWAs.
Each HC has a number of rpipes and buffers that can be assigned to them;
when doing a data transfer (xfer), first the rpipe has to be aimed and
prepared (buffers assigned), then we can start queueing requests for
data in or out.
Data buffers have to be segmented out before sending--so we send first a
header (segment request) and then if there is any data, a data buffer
immediately after to the DTI interface (yep, even the request). If our
buffer is bigger than the max segment size, then we just do multiple
requests.
[This sucks, because doing USB scatter gatter in Linux is resource
intensive, if any...not that the current approach is not. It just has to
be cleaned up a lot :)].
If reading, we don't send data buffers, just the segment headers saying
we want to read segments.
When the xfer is executed, we receive a notification that says data is
ready in the DTI endpoint (handled through
xfer.c:wa_handle_notif_xfer()). In there we read from the DTI endpoint a
descriptor that gives us the status of the transfer, its identification
(given when we issued it) and the segment number. If it was a data read,
we issue another URB to read into the destination buffer the chunk of
data coming out of the remote endpoint. Done, wait for the next guy. The
callbacks for the URBs issued from here are the ones that will declare
the xfer complete at some point and call it's callback.
Seems simple, but the implementation is not trivial.
*
*WARNING* Old!!
The main xfer descriptor, wa_xfer (equivalent to a URB) contains an
array of segments, tallys on segments and buffers and callback
information. Buried in there is a lot of URBs for executing the segments
and buffer transfers.
For OUT xfers, there is an array of segments, one URB for each, another
one of buffer URB. When submitting, we submit URBs for segment request
1, buffer 1, segment 2, buffer 2...etc. Then we wait on the DTI for xfer
result data; when all the segments are complete, we call the callback to
finalize the transfer.
For IN xfers, we only issue URBs for the segments we want to read and
then wait for the xfer result data.
*URB mapping into xfers*
This is done by hwahc_op_urb_[en|de]queue(). In enqueue() we aim an
rpipe to the endpoint where we have to transmit, create a transfer
context (wa_xfer) and submit it. When the xfer is done, our callback is
called and we assign the status bits and release the xfer resources.
In dequeue() we are basically cancelling/aborting the transfer. We issue
a xfer abort request to the HC, cancell all the URBs we had submitted
and not yet done and when all that is done, the xfer callback will be
called--this will call the URB callback.
Glossary
*DWA* -- Device Wire Adapter
USB host, wired for downstream devices, upstream connects wirelessly
with Wireless USB.
*EVENT* -- Response to a command on the NEEP
*HWA* -- Host Wire Adapter / USB dongle for UWB and Wireless USB
*NEH* -- Notification/Event Handle
Handle/file descriptor for receiving notifications or events. The WA
code requires you to get one of this to listen for notifications or
events on the NEEP.
*NEEP* -- Notification/Event EndPoint
Stuff related to the management of the first endpoint of a HWA USB
dongle that is used to deliver an stream of events and notifications to
the host.
*NOTIFICATION* -- Message coming in the NEEP as response to something.
*RC* -- Radio Control
Design-overview.txt-1.8 (last edited 2006-11-04 12:22:24 by
InakyPerezGonzalez)
Documentation/usb/wusb-cbaf 0 → 100644
浏览文件 @ 9779a832
#! /bin/bash
#
set -e
progname=$(basename $0)
function help
{
cat <<EOF
Usage: $progname COMMAND DEVICEs [ARGS]
Command for manipulating the pairing/authentication credentials of a
Wireless USB device that supports wired-mode Cable-Based-Association.
Works in conjunction with the wusb-cba.ko driver from http://linuxuwb.org.
DEVICE
sysfs path to the device to authenticate; for example, both this
guys are the same:
/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4.4/1-4.4:1.1
/sys/bus/usb/drivers/wusb-cbaf/1-4.4:1.1
COMMAND/ARGS are
start
Start a WUSB host controller (by setting up a CHID)
set-chid DEVICE HOST-CHID HOST-BANDGROUP HOST-NAME
Sets host information in the device; after this you can call the
get-cdid to see how does this device report itself to us.
get-cdid DEVICE
Get the device ID associated to the HOST-CHDI we sent with
'set-chid'. We might not know about it.
set-cc DEVICE
If we allow the device to connect, set a random new CDID and CK
(connection key). Device saves them for the next time it wants to
connect wireless. We save them for that next time also so we can
authenticate the device (when we see the CDID he uses to id
itself) and the CK to crypto talk to it.
CHID is always 16 hex bytes in 'XX YY ZZ...' form
BANDGROUP is almost always 0001
Examples:
You can default most arguments to '' to get a sane value:
$ $progname set-chid '' '' '' "My host name"
A full sequence:
$ $progname set-chid '' '' '' "My host name"
$ $progname get-cdid ''
$ $progname set-cc ''
EOF
}
# Defaults
# FIXME: CHID should come from a database :), band group from the host
host_CHID="00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff"
host_band_group="0001"
host_name=$(hostname)
devs="$(echo /sys/bus/usb/drivers/wusb-cbaf/[0-9]*)"
hdevs="$(for h in /sys/class/uwb_rc/*/wusbhc; do readlink -f $h; done)"
result=0
case $1 in
start)
for dev in ${2:-$hdevs}
do
uwb_rc=$(readlink -f $dev/uwb_rc)
if cat $uwb_rc/beacon | grep -q -- "-1"
then
echo 13 0 > $uwb_rc/beacon
echo I: started beaconing on ch 13 on $(basename $uwb_rc) >&2
fi
echo $host_CHID > $dev/wusb_chid
echo I: started host $(basename $dev) >&2
done
;;
stop)
for dev in ${2:-$hdevs}
do
echo 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > $dev/wusb_chid
echo I: stopped host $(basename $dev) >&2
uwb_rc=$(readlink -f $dev/uwb_rc)
echo -1 | cat > $uwb_rc/beacon
echo I: stopped beaconing on $(basename $uwb_rc) >&2
done
;;
set-chid)
shift
for dev in ${2:-$devs}; do
echo "${4:-$host_name}" > $dev/wusb_host_name
echo "${3:-$host_band_group}" > $dev/wusb_host_band_groups
echo ${2:-$host_CHID} > $dev/wusb_chid
done
;;
get-cdid)
for dev in ${2:-$devs}
do
cat $dev/wusb_cdid
done
;;
set-cc)
for dev in ${2:-$devs}; do
shift
CDID="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
CK="$(head --bytes=16 /dev/urandom | od -tx1 -An)"
echo "$CDID" > $dev/wusb_cdid
echo "$CK" > $dev/wusb_ck
echo I: CC set >&2
echo "CHID: $(cat $dev/wusb_chid)"
echo "CDID:$CDID"
echo "CK: $CK"
done
;;
help|h|--help|-h)
help
;;
*)
echo "E: Unknown usage" 1>&2
help 1>&2
result=1
esac
exit $result
MAINTAINERS
浏览文件 @ 9779a832
......@@ -1053,6 +1053,12 @@ L: cbe-oss-dev@ozlabs.org
W: http://www.ibm.com/developerworks/power/cell/
S: Supported
CERTIFIED WIRELESS USB (WUSB) SUBSYSTEM:
P: David Vrabel
M: david.vrabel@csr.com
L: linux-usb@vger.kernel.org
S: Supported
CFAG12864B LCD DRIVER
P: Miguel Ojeda Sandonis
M: miguel.ojeda.sandonis@gmail.com
......@@ -4191,6 +4197,12 @@ L: sparclinux@vger.kernel.org
T: git kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6.git
S: Maintained
ULTRA-WIDEBAND (UWB) SUBSYSTEM:
P: David Vrabel
M: david.vrabel@csr.com
L: linux-usb@vger.kernel.org
S: Supported
UNIFORM CDROM DRIVER
P: Jens Axboe
M: axboe@kernel.dk
......@@ -4616,6 +4628,11 @@ M: zaga@fly.cc.fer.hr
L: linux-scsi@vger.kernel.org
S: Maintained
WIMEDIA LLC PROTOCOL (WLP) SUBSYSTEM
P: David Vrabel
M: david.vrabel@csr.com
S: Maintained
WISTRON LAPTOP BUTTON DRIVER
P: Miloslav Trmac
M: mitr@volny.cz
......
arch/arm/Kconfig
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......@@ -1256,6 +1256,8 @@ source "drivers/hid/Kconfig"
source "drivers/usb/Kconfig"
source "drivers/uwb/Kconfig"
source "drivers/mmc/Kconfig"
source "drivers/memstick/Kconfig"
......
arch/cris/Kconfig
浏览文件 @ 9779a832
......@@ -679,6 +679,8 @@ source "fs/Kconfig"
source "drivers/usb/Kconfig"
source "drivers/uwb/Kconfig"
source "arch/cris/Kconfig.debug"
source "security/Kconfig"
......
arch/h8300/Kconfig
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......@@ -216,6 +216,8 @@ source "drivers/hwmon/Kconfig"
source "drivers/usb/Kconfig"
source "drivers/uwb/Kconfig"
endmenu
source "fs/Kconfig"
......
drivers/Kconfig
浏览文件 @ 9779a832
......@@ -78,6 +78,8 @@ source "drivers/hid/Kconfig"
source "drivers/usb/Kconfig"
source "drivers/uwb/Kconfig"
source "drivers/mmc/Kconfig"
source "drivers/memstick/Kconfig"
......
drivers/Makefile
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......@@ -100,3 +100,4 @@ obj-$(CONFIG_SSB) += ssb/
obj-$(CONFIG_VIRTIO) += virtio/
obj-$(CONFIG_REGULATOR) += regulator/
obj-$(CONFIG_STAGING) += staging/
obj-$(CONFIG_UWB) += uwb/
drivers/usb/Kconfig
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......@@ -97,6 +97,8 @@ source "drivers/usb/core/Kconfig"
source "drivers/usb/mon/Kconfig"
source "drivers/usb/wusbcore/Kconfig"
source "drivers/usb/host/Kconfig"
source "drivers/usb/musb/Kconfig"
......
drivers/usb/Makefile
浏览文件 @ 9779a832
......@@ -16,9 +16,12 @@ obj-$(CONFIG_USB_UHCI_HCD) += host/
obj-$(CONFIG_USB_SL811_HCD) += host/
obj-$(CONFIG_USB_U132_HCD) += host/
obj-$(CONFIG_USB_R8A66597_HCD) += host/
obj-$(CONFIG_USB_HWA_HCD) += host/
obj-$(CONFIG_USB_C67X00_HCD) += c67x00/
obj-$(CONFIG_USB_WUSB) += wusbcore/
obj-$(CONFIG_USB_ACM) += class/
obj-$(CONFIG_USB_PRINTER) += class/
......
drivers/usb/host/Kconfig
浏览文件 @ 9779a832
......@@ -305,3 +305,31 @@ config SUPERH_ON_CHIP_R8A66597
help
This driver enables support for the on-chip R8A66597 in the
SH7366 and SH7723 processors.
config USB_WHCI_HCD
tristate "Wireless USB Host Controller Interface (WHCI) driver (EXPERIMENTAL)"
depends on EXPERIMENTAL
depends on PCI && USB
select USB_WUSB
select UWB_WHCI
help
A driver for PCI-based Wireless USB Host Controllers that are
compliant with the WHCI specification.
To compile this driver a module, choose M here: the module
will be called "whci-hcd".
config USB_HWA_HCD
tristate "Host Wire Adapter (HWA) driver (EXPERIMENTAL)"
depends on EXPERIMENTAL
depends on USB
select USB_WUSB
select UWB_HWA
help
This driver enables you to connect Wireless USB devices to
your system using a Host Wire Adaptor USB dongle. This is an
UWB Radio Controller and WUSB Host Controller connected to
your machine via USB (specified in WUSB1.0).
To compile this driver a module, choose M here: the module
will be called "hwa-hc".
drivers/usb/host/Makefile
浏览文件 @ 9779a832
......@@ -8,6 +8,8 @@ endif
isp1760-objs := isp1760-hcd.o isp1760-if.o
obj-$(CONFIG_USB_WHCI_HCD) += whci/
obj-$(CONFIG_PCI) += pci-quirks.o
obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
......@@ -19,3 +21,4 @@ obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
obj-$(CONFIG_USB_ISP1760_HCD) += isp1760.o
obj-$(CONFIG_USB_HWA_HCD) += hwa-hc.o
drivers/usb/host/hwa-hc.c 0 → 100644
浏览文件 @ 9779a832
此差异已折叠。
drivers/usb/host/whci/Kbuild 0 → 100644
浏览文件 @ 9779a832
obj-$(CONFIG_USB_WHCI_HCD) += whci-hcd.o
whci-hcd-y := \
asl.o \
hcd.o \
hw.o \
init.o \
int.o \
pzl.o \
qset.o \
wusb.o
drivers/usb/host/whci/asl.c 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) asynchronous schedule management.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/uwb/umc.h>
#include <linux/usb.h>
#define D_LOCAL 0
#include <linux/uwb/debug.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
#if D_LOCAL >= 4
static void dump_asl(struct whc *whc, const char *tag)
{
struct device *dev = &whc->umc->dev;
struct whc_qset *qset;
d_printf(4, dev, "ASL %s\n", tag);
list_for_each_entry(qset, &whc->async_list, list_node) {
dump_qset(qset, dev);
}
}
#else
static inline void dump_asl(struct whc *whc, const char *tag)
{
}
#endif
static void qset_get_next_prev(struct whc *whc, struct whc_qset *qset,
struct whc_qset **next, struct whc_qset **prev)
{
struct list_head *n, *p;
BUG_ON(list_empty(&whc->async_list));
n = qset->list_node.next;
if (n == &whc->async_list)
n = n->next;
p = qset->list_node.prev;
if (p == &whc->async_list)
p = p->prev;
*next = container_of(n, struct whc_qset, list_node);
*prev = container_of(p, struct whc_qset, list_node);
}
static void asl_qset_insert_begin(struct whc *whc, struct whc_qset *qset)
{
list_move(&qset->list_node, &whc->async_list);
qset->in_sw_list = true;
}
static void asl_qset_insert(struct whc *whc, struct whc_qset *qset)
{
struct whc_qset *next, *prev;
qset_clear(whc, qset);
/* Link into ASL. */
qset_get_next_prev(whc, qset, &next, &prev);
whc_qset_set_link_ptr(&qset->qh.link, next->qset_dma);
whc_qset_set_link_ptr(&prev->qh.link, qset->qset_dma);
qset->in_hw_list = true;
}
static void asl_qset_remove(struct whc *whc, struct whc_qset *qset)
{
struct whc_qset *prev, *next;
qset_get_next_prev(whc, qset, &next, &prev);
list_move(&qset->list_node, &whc->async_removed_list);
qset->in_sw_list = false;
/*
* No more qsets in the ASL? The caller must stop the ASL as
* it's no longer valid.
*/
if (list_empty(&whc->async_list))
return;
/* Remove from ASL. */
whc_qset_set_link_ptr(&prev->qh.link, next->qset_dma);
qset->in_hw_list = false;
}
/**
* process_qset - process any recently inactivated or halted qTDs in a
* qset.
*
* After inactive qTDs are removed, new qTDs can be added if the
* urb queue still contains URBs.
*
* Returns any additional WUSBCMD bits for the ASL sync command (i.e.,
* WUSBCMD_ASYNC_QSET_RM if a halted qset was removed).
*/
static uint32_t process_qset(struct whc *whc, struct whc_qset *qset)
{
enum whc_update update = 0;
uint32_t status = 0;
while (qset->ntds) {
struct whc_qtd *td;
int t;
t = qset->td_start;
td = &qset->qtd[qset->td_start];
status = le32_to_cpu(td->status);
/*
* Nothing to do with a still active qTD.
*/
if (status & QTD_STS_ACTIVE)
break;
if (status & QTD_STS_HALTED) {
/* Ug, an error. */
process_halted_qtd(whc, qset, td);
goto done;
}
/* Mmm, a completed qTD. */
process_inactive_qtd(whc, qset, td);
}
update |= qset_add_qtds(whc, qset);
done:
/*
* Remove this qset from the ASL if requested, but only if has
* no qTDs.
*/
if (qset->remove && qset->ntds == 0) {
asl_qset_remove(whc, qset);
update |= WHC_UPDATE_REMOVED;
}
return update;
}
void asl_start(struct whc *whc)
{
struct whc_qset *qset;
qset = list_first_entry(&whc->async_list, struct whc_qset, list_node);
le_writeq(qset->qset_dma | QH_LINK_NTDS(8), whc->base + WUSBASYNCLISTADDR);
whc_write_wusbcmd(whc, WUSBCMD_ASYNC_EN, WUSBCMD_ASYNC_EN);
whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
WUSBSTS_ASYNC_SCHED, WUSBSTS_ASYNC_SCHED,
1000, "start ASL");
}
void asl_stop(struct whc *whc)
{
whc_write_wusbcmd(whc, WUSBCMD_ASYNC_EN, 0);
whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
WUSBSTS_ASYNC_SCHED, 0,
1000, "stop ASL");
}
void asl_update(struct whc *whc, uint32_t wusbcmd)
{
whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
wait_event(whc->async_list_wq,
(le_readl(whc->base + WUSBCMD) & WUSBCMD_ASYNC_UPDATED) == 0);
}
/**
* scan_async_work - scan the ASL for qsets to process.
*
* Process each qset in the ASL in turn and then signal the WHC that
* the ASL has been updated.
*
* Then start, stop or update the asynchronous schedule as required.
*/
void scan_async_work(struct work_struct *work)
{
struct whc *whc = container_of(work, struct whc, async_work);
struct whc_qset *qset, *t;
enum whc_update update = 0;
spin_lock_irq(&whc->lock);
dump_asl(whc, "before processing");
/*
* Transerve the software list backwards so new qsets can be
* safely inserted into the ASL without making it non-circular.
*/
list_for_each_entry_safe_reverse(qset, t, &whc->async_list, list_node) {
if (!qset->in_hw_list) {
asl_qset_insert(whc, qset);
update |= WHC_UPDATE_ADDED;
}
update |= process_qset(whc, qset);
}
dump_asl(whc, "after processing");
spin_unlock_irq(&whc->lock);
if (update) {
uint32_t wusbcmd = WUSBCMD_ASYNC_UPDATED | WUSBCMD_ASYNC_SYNCED_DB;
if (update & WHC_UPDATE_REMOVED)
wusbcmd |= WUSBCMD_ASYNC_QSET_RM;
asl_update(whc, wusbcmd);
}
/*
* Now that the ASL is updated, complete the removal of any
* removed qsets.
*/
spin_lock(&whc->lock);
list_for_each_entry_safe(qset, t, &whc->async_removed_list, list_node) {
qset_remove_complete(whc, qset);
}
spin_unlock(&whc->lock);
}
/**
* asl_urb_enqueue - queue an URB onto the asynchronous list (ASL).
* @whc: the WHCI host controller
* @urb: the URB to enqueue
* @mem_flags: flags for any memory allocations
*
* The qset for the endpoint is obtained and the urb queued on to it.
*
* Work is scheduled to update the hardware's view of the ASL.
*/
int asl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags)
{
struct whc_qset *qset;
int err;
unsigned long flags;
spin_lock_irqsave(&whc->lock, flags);
qset = get_qset(whc, urb, GFP_ATOMIC);
if (qset == NULL)
err = -ENOMEM;
else
err = qset_add_urb(whc, qset, urb, GFP_ATOMIC);
if (!err) {
usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb);
if (!qset->in_sw_list)
asl_qset_insert_begin(whc, qset);
}
spin_unlock_irqrestore(&whc->lock, flags);
if (!err)
queue_work(whc->workqueue, &whc->async_work);
return 0;
}
/**
* asl_urb_dequeue - remove an URB (qset) from the async list.
* @whc: the WHCI host controller
* @urb: the URB to dequeue
* @status: the current status of the URB
*
* URBs that do yet have qTDs can simply be removed from the software
* queue, otherwise the qset must be removed from the ASL so the qTDs
* can be removed.
*/
int asl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
{
struct whc_urb *wurb = urb->hcpriv;
struct whc_qset *qset = wurb->qset;
struct whc_std *std, *t;
int ret;
unsigned long flags;
spin_lock_irqsave(&whc->lock, flags);
ret = usb_hcd_check_unlink_urb(&whc->wusbhc.usb_hcd, urb, status);
if (ret < 0)
goto out;
list_for_each_entry_safe(std, t, &qset->stds, list_node) {
if (std->urb == urb)
qset_free_std(whc, std);
else
std->qtd = NULL; /* so this std is re-added when the qset is */
}
asl_qset_remove(whc, qset);
wurb->status = status;
wurb->is_async = true;
queue_work(whc->workqueue, &wurb->dequeue_work);
out:
spin_unlock_irqrestore(&whc->lock, flags);
return ret;
}
/**
* asl_qset_delete - delete a qset from the ASL
*/
void asl_qset_delete(struct whc *whc, struct whc_qset *qset)
{
qset->remove = 1;
queue_work(whc->workqueue, &whc->async_work);
qset_delete(whc, qset);
}
/**
* asl_init - initialize the asynchronous schedule list
*
* A dummy qset with no qTDs is added to the ASL to simplify removing
* qsets (no need to stop the ASL when the last qset is removed).
*/
int asl_init(struct whc *whc)
{
struct whc_qset *qset;
qset = qset_alloc(whc, GFP_KERNEL);
if (qset == NULL)
return -ENOMEM;
asl_qset_insert_begin(whc, qset);
asl_qset_insert(whc, qset);
return 0;
}
/**
* asl_clean_up - free ASL resources
*
* The ASL is stopped and empty except for the dummy qset.
*/
void asl_clean_up(struct whc *whc)
{
struct whc_qset *qset;
if (!list_empty(&whc->async_list)) {
qset = list_first_entry(&whc->async_list, struct whc_qset, list_node);
list_del(&qset->list_node);
qset_free(whc, qset);
}
}
drivers/usb/host/whci/hcd.c 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) driver.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/uwb/umc.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
/*
* One time initialization.
*
* Nothing to do here.
*/
static int whc_reset(struct usb_hcd *usb_hcd)
{
return 0;
}
/*
* Start the wireless host controller.
*
* Start device notification.
*
* Put hc into run state, set DNTS parameters.
*/
static int whc_start(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
u8 bcid;
int ret;
mutex_lock(&wusbhc->mutex);
le_writel(WUSBINTR_GEN_CMD_DONE
| WUSBINTR_HOST_ERR
| WUSBINTR_ASYNC_SCHED_SYNCED
| WUSBINTR_DNTS_INT
| WUSBINTR_ERR_INT
| WUSBINTR_INT,
whc->base + WUSBINTR);
/* set cluster ID */
bcid = wusb_cluster_id_get();
ret = whc_set_cluster_id(whc, bcid);
if (ret < 0)
goto out;
wusbhc->cluster_id = bcid;
/* start HC */
whc_write_wusbcmd(whc, WUSBCMD_RUN, WUSBCMD_RUN);
usb_hcd->uses_new_polling = 1;
usb_hcd->poll_rh = 1;
usb_hcd->state = HC_STATE_RUNNING;
out:
mutex_unlock(&wusbhc->mutex);
return ret;
}
/*
* Stop the wireless host controller.
*
* Stop device notification.
*
* Wait for pending transfer to stop? Put hc into stop state?
*/
static void whc_stop(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
mutex_lock(&wusbhc->mutex);
wusbhc_stop(wusbhc);
/* stop HC */
le_writel(0, whc->base + WUSBINTR);
whc_write_wusbcmd(whc, WUSBCMD_RUN, 0);
whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
WUSBSTS_HCHALTED, WUSBSTS_HCHALTED,
100, "HC to halt");
wusb_cluster_id_put(wusbhc->cluster_id);
mutex_unlock(&wusbhc->mutex);
}
static int whc_get_frame_number(struct usb_hcd *usb_hcd)
{
/* Frame numbers are not applicable to WUSB. */
return -ENOSYS;
}
/*
* Queue an URB to the ASL or PZL
*/
static int whc_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
gfp_t mem_flags)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
int ret;
switch (usb_pipetype(urb->pipe)) {
case PIPE_INTERRUPT:
ret = pzl_urb_enqueue(whc, urb, mem_flags);
break;
case PIPE_ISOCHRONOUS:
dev_err(&whc->umc->dev, "isochronous transfers unsupported\n");
ret = -ENOTSUPP;
break;
case PIPE_CONTROL:
case PIPE_BULK:
default:
ret = asl_urb_enqueue(whc, urb, mem_flags);
break;
};
return ret;
}
/*
* Remove a queued URB from the ASL or PZL.
*/
static int whc_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb, int status)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
int ret;
switch (usb_pipetype(urb->pipe)) {
case PIPE_INTERRUPT:
ret = pzl_urb_dequeue(whc, urb, status);
break;
case PIPE_ISOCHRONOUS:
ret = -ENOTSUPP;
break;
case PIPE_CONTROL:
case PIPE_BULK:
default:
ret = asl_urb_dequeue(whc, urb, status);
break;
};
return ret;
}
/*
* Wait for all URBs to the endpoint to be completed, then delete the
* qset.
*/
static void whc_endpoint_disable(struct usb_hcd *usb_hcd,
struct usb_host_endpoint *ep)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
struct whc_qset *qset;
qset = ep->hcpriv;
if (qset) {
ep->hcpriv = NULL;
if (usb_endpoint_xfer_bulk(&ep->desc)
|| usb_endpoint_xfer_control(&ep->desc))
asl_qset_delete(whc, qset);
else
pzl_qset_delete(whc, qset);
}
}
static struct hc_driver whc_hc_driver = {
.description = "whci-hcd",
.product_desc = "Wireless host controller",
.hcd_priv_size = sizeof(struct whc) - sizeof(struct usb_hcd),
.irq = whc_int_handler,
.flags = HCD_USB2,
.reset = whc_reset,
.start = whc_start,
.stop = whc_stop,
.get_frame_number = whc_get_frame_number,
.urb_enqueue = whc_urb_enqueue,
.urb_dequeue = whc_urb_dequeue,
.endpoint_disable = whc_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 whc_probe(struct umc_dev *umc)
{
int ret = -ENOMEM;
struct usb_hcd *usb_hcd;
struct wusbhc *wusbhc = NULL;
struct whc *whc = NULL;
struct device *dev = &umc->dev;
usb_hcd = usb_create_hcd(&whc_hc_driver, dev, "whci");
if (usb_hcd == NULL) {
dev_err(dev, "unable to create hcd\n");
goto error;
}
usb_hcd->wireless = 1;
wusbhc = usb_hcd_to_wusbhc(usb_hcd);
whc = wusbhc_to_whc(wusbhc);
whc->umc = umc;
ret = whc_init(whc);
if (ret)
goto error;
wusbhc->dev = dev;
wusbhc->uwb_rc = uwb_rc_get_by_grandpa(umc->dev.parent);
if (!wusbhc->uwb_rc) {
ret = -ENODEV;
dev_err(dev, "cannot get radio controller\n");
goto error;
}
if (whc->n_devices > USB_MAXCHILDREN) {
dev_warn(dev, "USB_MAXCHILDREN too low for WUSB adapter (%u ports)\n",
whc->n_devices);
wusbhc->ports_max = USB_MAXCHILDREN;
} else
wusbhc->ports_max = whc->n_devices;
wusbhc->mmcies_max = whc->n_mmc_ies;
wusbhc->start = whc_wusbhc_start;
wusbhc->stop = whc_wusbhc_stop;
wusbhc->mmcie_add = whc_mmcie_add;
wusbhc->mmcie_rm = whc_mmcie_rm;
wusbhc->dev_info_set = whc_dev_info_set;
wusbhc->bwa_set = whc_bwa_set;
wusbhc->set_num_dnts = whc_set_num_dnts;
wusbhc->set_ptk = whc_set_ptk;
wusbhc->set_gtk = whc_set_gtk;
ret = wusbhc_create(wusbhc);
if (ret)
goto error_wusbhc_create;
ret = usb_add_hcd(usb_hcd, whc->umc->irq, IRQF_SHARED);
if (ret) {
dev_err(dev, "cannot add HCD: %d\n", ret);
goto error_usb_add_hcd;
}
ret = wusbhc_b_create(wusbhc);
if (ret) {
dev_err(dev, "WUSBHC phase B setup failed: %d\n", ret);
goto error_wusbhc_b_create;
}
return 0;
error_wusbhc_b_create:
usb_remove_hcd(usb_hcd);
error_usb_add_hcd:
wusbhc_destroy(wusbhc);
error_wusbhc_create:
uwb_rc_put(wusbhc->uwb_rc);
error:
whc_clean_up(whc);
if (usb_hcd)
usb_put_hcd(usb_hcd);
return ret;
}
static void whc_remove(struct umc_dev *umc)
{
struct usb_hcd *usb_hcd = dev_get_drvdata(&umc->dev);
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
if (usb_hcd) {
wusbhc_b_destroy(wusbhc);
usb_remove_hcd(usb_hcd);
wusbhc_destroy(wusbhc);
uwb_rc_put(wusbhc->uwb_rc);
whc_clean_up(whc);
usb_put_hcd(usb_hcd);
}
}
static struct umc_driver whci_hc_driver = {
.name = "whci-hcd",
.cap_id = UMC_CAP_ID_WHCI_WUSB_HC,
.probe = whc_probe,
.remove = whc_remove,
};
static int __init whci_hc_driver_init(void)
{
return umc_driver_register(&whci_hc_driver);
}
module_init(whci_hc_driver_init);
static void __exit whci_hc_driver_exit(void)
{
umc_driver_unregister(&whci_hc_driver);
}
module_exit(whci_hc_driver_exit);
/* PCI device ID's that we handle (so it gets loaded) */
static struct pci_device_id whci_hcd_id_table[] = {
{ PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) },
{ /* empty last entry */ }
};
MODULE_DEVICE_TABLE(pci, whci_hcd_id_table);
MODULE_DESCRIPTION("WHCI Wireless USB host controller driver");
MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
MODULE_LICENSE("GPL");
drivers/usb/host/whci/hw.c 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) hardware access helpers.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/uwb/umc.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
void whc_write_wusbcmd(struct whc *whc, u32 mask, u32 val)
{
unsigned long flags;
u32 cmd;
spin_lock_irqsave(&whc->lock, flags);
cmd = le_readl(whc->base + WUSBCMD);
cmd = (cmd & ~mask) | val;
le_writel(cmd, whc->base + WUSBCMD);
spin_unlock_irqrestore(&whc->lock, flags);
}
/**
* whc_do_gencmd - start a generic command via the WUSBGENCMDSTS register
* @whc: the WHCI HC
* @cmd: command to start.
* @params: parameters for the command (the WUSBGENCMDPARAMS register value).
* @addr: pointer to any data for the command (may be NULL).
* @len: length of the data (if any).
*/
int whc_do_gencmd(struct whc *whc, u32 cmd, u32 params, void *addr, size_t len)
{
unsigned long flags;
dma_addr_t dma_addr;
int t;
mutex_lock(&whc->mutex);
/* Wait for previous command to complete. */
t = wait_event_timeout(whc->cmd_wq,
(le_readl(whc->base + WUSBGENCMDSTS) & WUSBGENCMDSTS_ACTIVE) == 0,
WHC_GENCMD_TIMEOUT_MS);
if (t == 0) {
dev_err(&whc->umc->dev, "generic command timeout (%04x/%04x)\n",
le_readl(whc->base + WUSBGENCMDSTS),
le_readl(whc->base + WUSBGENCMDPARAMS));
return -ETIMEDOUT;
}
if (addr) {
memcpy(whc->gen_cmd_buf, addr, len);
dma_addr = whc->gen_cmd_buf_dma;
} else
dma_addr = 0;
/* Poke registers to start cmd. */
spin_lock_irqsave(&whc->lock, flags);
le_writel(params, whc->base + WUSBGENCMDPARAMS);
le_writeq(dma_addr, whc->base + WUSBGENADDR);
le_writel(WUSBGENCMDSTS_ACTIVE | WUSBGENCMDSTS_IOC | cmd,
whc->base + WUSBGENCMDSTS);
spin_unlock_irqrestore(&whc->lock, flags);
mutex_unlock(&whc->mutex);
return 0;
}
drivers/usb/host/whci/init.c 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) initialization.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/uwb/umc.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
/*
* Reset the host controller.
*/
static void whc_hw_reset(struct whc *whc)
{
le_writel(WUSBCMD_WHCRESET, whc->base + WUSBCMD);
whci_wait_for(&whc->umc->dev, whc->base + WUSBCMD, WUSBCMD_WHCRESET, 0,
100, "reset");
}
static void whc_hw_init_di_buf(struct whc *whc)
{
int d;
/* Disable all entries in the Device Information buffer. */
for (d = 0; d < whc->n_devices; d++)
whc->di_buf[d].addr_sec_info = WHC_DI_DISABLE;
le_writeq(whc->di_buf_dma, whc->base + WUSBDEVICEINFOADDR);
}
static void whc_hw_init_dn_buf(struct whc *whc)
{
/* Clear the Device Notification buffer to ensure the V (valid)
* bits are clear. */
memset(whc->dn_buf, 0, 4096);
le_writeq(whc->dn_buf_dma, whc->base + WUSBDNTSBUFADDR);
}
int whc_init(struct whc *whc)
{
u32 whcsparams;
int ret, i;
resource_size_t start, len;
spin_lock_init(&whc->lock);
mutex_init(&whc->mutex);
init_waitqueue_head(&whc->cmd_wq);
init_waitqueue_head(&whc->async_list_wq);
init_waitqueue_head(&whc->periodic_list_wq);
whc->workqueue = create_singlethread_workqueue(dev_name(&whc->umc->dev));
if (whc->workqueue == NULL) {
ret = -ENOMEM;
goto error;
}
INIT_WORK(&whc->dn_work, whc_dn_work);
INIT_WORK(&whc->async_work, scan_async_work);
INIT_LIST_HEAD(&whc->async_list);
INIT_LIST_HEAD(&whc->async_removed_list);
INIT_WORK(&whc->periodic_work, scan_periodic_work);
for (i = 0; i < 5; i++)
INIT_LIST_HEAD(&whc->periodic_list[i]);
INIT_LIST_HEAD(&whc->periodic_removed_list);
/* Map HC registers. */
start = whc->umc->resource.start;
len = whc->umc->resource.end - start + 1;
if (!request_mem_region(start, len, "whci-hc")) {
dev_err(&whc->umc->dev, "can't request HC region\n");
ret = -EBUSY;
goto error;
}
whc->base_phys = start;
whc->base = ioremap(start, len);
if (!whc->base) {
dev_err(&whc->umc->dev, "ioremap\n");
ret = -ENOMEM;
goto error;
}
whc_hw_reset(whc);
/* Read maximum number of devices, keys and MMC IEs. */
whcsparams = le_readl(whc->base + WHCSPARAMS);
whc->n_devices = WHCSPARAMS_TO_N_DEVICES(whcsparams);
whc->n_keys = WHCSPARAMS_TO_N_KEYS(whcsparams);
whc->n_mmc_ies = WHCSPARAMS_TO_N_MMC_IES(whcsparams);
dev_dbg(&whc->umc->dev, "N_DEVICES = %d, N_KEYS = %d, N_MMC_IES = %d\n",
whc->n_devices, whc->n_keys, whc->n_mmc_ies);
whc->qset_pool = dma_pool_create("qset", &whc->umc->dev,
sizeof(struct whc_qset), 64, 0);
if (whc->qset_pool == NULL) {
ret = -ENOMEM;
goto error;
}
ret = asl_init(whc);
if (ret < 0)
goto error;
ret = pzl_init(whc);
if (ret < 0)
goto error;
/* Allocate and initialize a buffer for generic commands, the
Device Information buffer, and the Device Notification
buffer. */
whc->gen_cmd_buf = dma_alloc_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN,
&whc->gen_cmd_buf_dma, GFP_KERNEL);
if (whc->gen_cmd_buf == NULL) {
ret = -ENOMEM;
goto error;
}
whc->dn_buf = dma_alloc_coherent(&whc->umc->dev,
sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES,
&whc->dn_buf_dma, GFP_KERNEL);
if (!whc->dn_buf) {
ret = -ENOMEM;
goto error;
}
whc_hw_init_dn_buf(whc);
whc->di_buf = dma_alloc_coherent(&whc->umc->dev,
sizeof(struct di_buf_entry) * whc->n_devices,
&whc->di_buf_dma, GFP_KERNEL);
if (!whc->di_buf) {
ret = -ENOMEM;
goto error;
}
whc_hw_init_di_buf(whc);
return 0;
error:
whc_clean_up(whc);
return ret;
}
void whc_clean_up(struct whc *whc)
{
resource_size_t len;
if (whc->di_buf)
dma_free_coherent(&whc->umc->dev, sizeof(struct di_buf_entry) * whc->n_devices,
whc->di_buf, whc->di_buf_dma);
if (whc->dn_buf)
dma_free_coherent(&whc->umc->dev, sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES,
whc->dn_buf, whc->dn_buf_dma);
if (whc->gen_cmd_buf)
dma_free_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN,
whc->gen_cmd_buf, whc->gen_cmd_buf_dma);
pzl_clean_up(whc);
asl_clean_up(whc);
if (whc->qset_pool)
dma_pool_destroy(whc->qset_pool);
len = whc->umc->resource.end - whc->umc->resource.start + 1;
if (whc->base)
iounmap(whc->base);
if (whc->base_phys)
release_mem_region(whc->base_phys, len);
if (whc->workqueue)
destroy_workqueue(whc->workqueue);
}
drivers/usb/host/whci/int.c 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) interrupt handling.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/uwb/umc.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
static void transfer_done(struct whc *whc)
{
queue_work(whc->workqueue, &whc->async_work);
queue_work(whc->workqueue, &whc->periodic_work);
}
irqreturn_t whc_int_handler(struct usb_hcd *hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 sts;
sts = le_readl(whc->base + WUSBSTS);
if (!(sts & WUSBSTS_INT_MASK))
return IRQ_NONE;
le_writel(sts & WUSBSTS_INT_MASK, whc->base + WUSBSTS);
if (sts & WUSBSTS_GEN_CMD_DONE)
wake_up(&whc->cmd_wq);
if (sts & WUSBSTS_HOST_ERR)
dev_err(&whc->umc->dev, "FIXME: host system error\n");
if (sts & WUSBSTS_ASYNC_SCHED_SYNCED)
wake_up(&whc->async_list_wq);
if (sts & WUSBSTS_PERIODIC_SCHED_SYNCED)
wake_up(&whc->periodic_list_wq);
if (sts & WUSBSTS_DNTS_INT)
queue_work(whc->workqueue, &whc->dn_work);
/*
* A transfer completed (see [WHCI] section 4.7.1.2 for when
* this occurs).
*/
if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT))
transfer_done(whc);
return IRQ_HANDLED;
}
static int process_dn_buf(struct whc *whc)
{
struct wusbhc *wusbhc = &whc->wusbhc;
struct dn_buf_entry *dn;
int processed = 0;
for (dn = whc->dn_buf; dn < whc->dn_buf + WHC_N_DN_ENTRIES; dn++) {
if (dn->status & WHC_DN_STATUS_VALID) {
wusbhc_handle_dn(wusbhc, dn->src_addr,
(struct wusb_dn_hdr *)dn->dn_data,
dn->msg_size);
dn->status &= ~WHC_DN_STATUS_VALID;
processed++;
}
}
return processed;
}
void whc_dn_work(struct work_struct *work)
{
struct whc *whc = container_of(work, struct whc, dn_work);
int processed;
do {
processed = process_dn_buf(whc);
} while (processed);
}
drivers/usb/host/whci/pzl.c 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) periodic schedule management.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/uwb/umc.h>
#include <linux/usb.h>
#define D_LOCAL 0
#include <linux/uwb/debug.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
#if D_LOCAL >= 4
static void dump_pzl(struct whc *whc, const char *tag)
{
struct device *dev = &whc->umc->dev;
struct whc_qset *qset;
int period = 0;
d_printf(4, dev, "PZL %s\n", tag);
for (period = 0; period < 5; period++) {
d_printf(4, dev, "Period %d\n", period);
list_for_each_entry(qset, &whc->periodic_list[period], list_node) {
dump_qset(qset, dev);
}
}
}
#else
static inline void dump_pzl(struct whc *whc, const char *tag)
{
}
#endif
static void update_pzl_pointers(struct whc *whc, int period, u64 addr)
{
switch (period) {
case 0:
whc_qset_set_link_ptr(&whc->pz_list[0], addr);
whc_qset_set_link_ptr(&whc->pz_list[2], addr);
whc_qset_set_link_ptr(&whc->pz_list[4], addr);
whc_qset_set_link_ptr(&whc->pz_list[6], addr);
whc_qset_set_link_ptr(&whc->pz_list[8], addr);
whc_qset_set_link_ptr(&whc->pz_list[10], addr);
whc_qset_set_link_ptr(&whc->pz_list[12], addr);
whc_qset_set_link_ptr(&whc->pz_list[14], addr);
break;
case 1:
whc_qset_set_link_ptr(&whc->pz_list[1], addr);
whc_qset_set_link_ptr(&whc->pz_list[5], addr);
whc_qset_set_link_ptr(&whc->pz_list[9], addr);
whc_qset_set_link_ptr(&whc->pz_list[13], addr);
break;
case 2:
whc_qset_set_link_ptr(&whc->pz_list[3], addr);
whc_qset_set_link_ptr(&whc->pz_list[11], addr);
break;
case 3:
whc_qset_set_link_ptr(&whc->pz_list[7], addr);
break;
case 4:
whc_qset_set_link_ptr(&whc->pz_list[15], addr);
break;
}
}
/*
* Return the 'period' to use for this qset. The minimum interval for
* the endpoint is used so whatever urbs are submitted the device is
* polled often enough.
*/
static int qset_get_period(struct whc *whc, struct whc_qset *qset)
{
uint8_t bInterval = qset->ep->desc.bInterval;
if (bInterval < 6)
bInterval = 6;
if (bInterval > 10)
bInterval = 10;
return bInterval - 6;
}
static void qset_insert_in_sw_list(struct whc *whc, struct whc_qset *qset)
{
int period;
period = qset_get_period(whc, qset);
qset_clear(whc, qset);
list_move(&qset->list_node, &whc->periodic_list[period]);
qset->in_sw_list = true;
}
static void pzl_qset_remove(struct whc *whc, struct whc_qset *qset)
{
list_move(&qset->list_node, &whc->periodic_removed_list);
qset->in_hw_list = false;
qset->in_sw_list = false;
}
/**
* pzl_process_qset - process any recently inactivated or halted qTDs
* in a qset.
*
* After inactive qTDs are removed, new qTDs can be added if the
* urb queue still contains URBs.
*
* Returns the schedule updates required.
*/
static enum whc_update pzl_process_qset(struct whc *whc, struct whc_qset *qset)
{
enum whc_update update = 0;
uint32_t status = 0;
while (qset->ntds) {
struct whc_qtd *td;
int t;
t = qset->td_start;
td = &qset->qtd[qset->td_start];
status = le32_to_cpu(td->status);
/*
* Nothing to do with a still active qTD.
*/
if (status & QTD_STS_ACTIVE)
break;
if (status & QTD_STS_HALTED) {
/* Ug, an error. */
process_halted_qtd(whc, qset, td);
goto done;
}
/* Mmm, a completed qTD. */
process_inactive_qtd(whc, qset, td);
}
update |= qset_add_qtds(whc, qset);
done:
/*
* If there are no qTDs in this qset, remove it from the PZL.
*/
if (qset->remove && qset->ntds == 0) {
pzl_qset_remove(whc, qset);
update |= WHC_UPDATE_REMOVED;
}
return update;
}
/**
* pzl_start - start the periodic schedule
* @whc: the WHCI host controller
*
* The PZL must be valid (e.g., all entries in the list should have
* the T bit set).
*/
void pzl_start(struct whc *whc)
{
le_writeq(whc->pz_list_dma, whc->base + WUSBPERIODICLISTBASE);
whc_write_wusbcmd(whc, WUSBCMD_PERIODIC_EN, WUSBCMD_PERIODIC_EN);
whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
WUSBSTS_PERIODIC_SCHED, WUSBSTS_PERIODIC_SCHED,
1000, "start PZL");
}
/**
* pzl_stop - stop the periodic schedule
* @whc: the WHCI host controller
*/
void pzl_stop(struct whc *whc)
{
whc_write_wusbcmd(whc, WUSBCMD_PERIODIC_EN, 0);
whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
WUSBSTS_PERIODIC_SCHED, 0,
1000, "stop PZL");
}
void pzl_update(struct whc *whc, uint32_t wusbcmd)
{
whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
wait_event(whc->periodic_list_wq,
(le_readl(whc->base + WUSBCMD) & WUSBCMD_PERIODIC_UPDATED) == 0);
}
static void update_pzl_hw_view(struct whc *whc)
{
struct whc_qset *qset, *t;
int period;
u64 tmp_qh = 0;
for (period = 0; period < 5; period++) {
list_for_each_entry_safe(qset, t, &whc->periodic_list[period], list_node) {
whc_qset_set_link_ptr(&qset->qh.link, tmp_qh);
tmp_qh = qset->qset_dma;
qset->in_hw_list = true;
}
update_pzl_pointers(whc, period, tmp_qh);
}
}
/**
* scan_periodic_work - scan the PZL for qsets to process.
*
* Process each qset in the PZL in turn and then signal the WHC that
* the PZL has been updated.
*
* Then start, stop or update the periodic schedule as required.
*/
void scan_periodic_work(struct work_struct *work)
{
struct whc *whc = container_of(work, struct whc, periodic_work);
struct whc_qset *qset, *t;
enum whc_update update = 0;
int period;
spin_lock_irq(&whc->lock);
dump_pzl(whc, "before processing");
for (period = 4; period >= 0; period--) {
list_for_each_entry_safe(qset, t, &whc->periodic_list[period], list_node) {
if (!qset->in_hw_list)
update |= WHC_UPDATE_ADDED;
update |= pzl_process_qset(whc, qset);
}
}
if (update & (WHC_UPDATE_ADDED | WHC_UPDATE_REMOVED))
update_pzl_hw_view(whc);
dump_pzl(whc, "after processing");
spin_unlock_irq(&whc->lock);
if (update) {
uint32_t wusbcmd = WUSBCMD_PERIODIC_UPDATED | WUSBCMD_PERIODIC_SYNCED_DB;
if (update & WHC_UPDATE_REMOVED)
wusbcmd |= WUSBCMD_PERIODIC_QSET_RM;
pzl_update(whc, wusbcmd);
}
/*
* Now that the PZL is updated, complete the removal of any
* removed qsets.
*/
spin_lock(&whc->lock);
list_for_each_entry_safe(qset, t, &whc->periodic_removed_list, list_node) {
qset_remove_complete(whc, qset);
}
spin_unlock(&whc->lock);
}
/**
* pzl_urb_enqueue - queue an URB onto the periodic list (PZL)
* @whc: the WHCI host controller
* @urb: the URB to enqueue
* @mem_flags: flags for any memory allocations
*
* The qset for the endpoint is obtained and the urb queued on to it.
*
* Work is scheduled to update the hardware's view of the PZL.
*/
int pzl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags)
{
struct whc_qset *qset;
int err;
unsigned long flags;
spin_lock_irqsave(&whc->lock, flags);
qset = get_qset(whc, urb, GFP_ATOMIC);
if (qset == NULL)
err = -ENOMEM;
else
err = qset_add_urb(whc, qset, urb, GFP_ATOMIC);
if (!err) {
usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb);
if (!qset->in_sw_list)
qset_insert_in_sw_list(whc, qset);
}
spin_unlock_irqrestore(&whc->lock, flags);
if (!err)
queue_work(whc->workqueue, &whc->periodic_work);
return 0;
}
/**
* pzl_urb_dequeue - remove an URB (qset) from the periodic list
* @whc: the WHCI host controller
* @urb: the URB to dequeue
* @status: the current status of the URB
*
* URBs that do yet have qTDs can simply be removed from the software
* queue, otherwise the qset must be removed so the qTDs can be safely
* removed.
*/
int pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status)
{
struct whc_urb *wurb = urb->hcpriv;
struct whc_qset *qset = wurb->qset;
struct whc_std *std, *t;
int ret;
unsigned long flags;
spin_lock_irqsave(&whc->lock, flags);
ret = usb_hcd_check_unlink_urb(&whc->wusbhc.usb_hcd, urb, status);
if (ret < 0)
goto out;
list_for_each_entry_safe(std, t, &qset->stds, list_node) {
if (std->urb == urb)
qset_free_std(whc, std);
else
std->qtd = NULL; /* so this std is re-added when the qset is */
}
pzl_qset_remove(whc, qset);
wurb->status = status;
wurb->is_async = false;
queue_work(whc->workqueue, &wurb->dequeue_work);
out:
spin_unlock_irqrestore(&whc->lock, flags);
return ret;
}
/**
* pzl_qset_delete - delete a qset from the PZL
*/
void pzl_qset_delete(struct whc *whc, struct whc_qset *qset)
{
qset->remove = 1;
queue_work(whc->workqueue, &whc->periodic_work);
qset_delete(whc, qset);
}
/**
* pzl_init - initialize the periodic zone list
* @whc: the WHCI host controller
*/
int pzl_init(struct whc *whc)
{
int i;
whc->pz_list = dma_alloc_coherent(&whc->umc->dev, sizeof(u64) * 16,
&whc->pz_list_dma, GFP_KERNEL);
if (whc->pz_list == NULL)
return -ENOMEM;
/* Set T bit on all elements in PZL. */
for (i = 0; i < 16; i++)
whc->pz_list[i] = cpu_to_le64(QH_LINK_NTDS(8) | QH_LINK_T);
le_writeq(whc->pz_list_dma, whc->base + WUSBPERIODICLISTBASE);
return 0;
}
/**
* pzl_clean_up - free PZL resources
* @whc: the WHCI host controller
*
* The PZL is stopped and empty.
*/
void pzl_clean_up(struct whc *whc)
{
if (whc->pz_list)
dma_free_coherent(&whc->umc->dev, sizeof(u64) * 16, whc->pz_list,
whc->pz_list_dma);
}
drivers/usb/host/whci/qset.c 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) qset management.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
#include <linux/uwb/umc.h>
#include <linux/usb.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
void dump_qset(struct whc_qset *qset, struct device *dev)
{
struct whc_std *std;
struct urb *urb = NULL;
int i;
dev_dbg(dev, "qset %08x\n", (u32)qset->qset_dma);
dev_dbg(dev, " -> %08x\n", (u32)qset->qh.link);
dev_dbg(dev, " info: %08x %08x %08x\n",
qset->qh.info1, qset->qh.info2, qset->qh.info3);
dev_dbg(dev, " sts: %04x errs: %d\n", qset->qh.status, qset->qh.err_count);
dev_dbg(dev, " TD: sts: %08x opts: %08x\n",
qset->qh.overlay.qtd.status, qset->qh.overlay.qtd.options);
for (i = 0; i < WHCI_QSET_TD_MAX; i++) {
dev_dbg(dev, " %c%c TD[%d]: sts: %08x opts: %08x ptr: %08x\n",
i == qset->td_start ? 'S' : ' ',
i == qset->td_end ? 'E' : ' ',
i, qset->qtd[i].status, qset->qtd[i].options,
(u32)qset->qtd[i].page_list_ptr);
}
dev_dbg(dev, " ntds: %d\n", qset->ntds);
list_for_each_entry(std, &qset->stds, list_node) {
if (urb != std->urb) {
urb = std->urb;
dev_dbg(dev, " urb %p transferred: %d bytes\n", urb,
urb->actual_length);
}
if (std->qtd)
dev_dbg(dev, " sTD[%td]: %zu bytes @ %08x\n",
std->qtd - &qset->qtd[0],
std->len, std->num_pointers ?
(u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
else
dev_dbg(dev, " sTD[-]: %zd bytes @ %08x\n",
std->len, std->num_pointers ?
(u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
}
}
struct whc_qset *qset_alloc(struct whc *whc, gfp_t mem_flags)
{
struct whc_qset *qset;
dma_addr_t dma;
qset = dma_pool_alloc(whc->qset_pool, mem_flags, &dma);
if (qset == NULL)
return NULL;
memset(qset, 0, sizeof(struct whc_qset));
qset->qset_dma = dma;
qset->whc = whc;
INIT_LIST_HEAD(&qset->list_node);
INIT_LIST_HEAD(&qset->stds);
return qset;
}
/**
* qset_fill_qh - fill the static endpoint state in a qset's QHead
* @qset: the qset whose QH needs initializing with static endpoint
* state
* @urb: an urb for a transfer to this endpoint
*/
static void qset_fill_qh(struct whc_qset *qset, struct urb *urb)
{
struct usb_device *usb_dev = urb->dev;
struct usb_wireless_ep_comp_descriptor *epcd;
bool is_out;
is_out = usb_pipeout(urb->pipe);
epcd = (struct usb_wireless_ep_comp_descriptor *)qset->ep->extra;
if (epcd) {
qset->max_seq = epcd->bMaxSequence;
qset->max_burst = epcd->bMaxBurst;
} else {
qset->max_seq = 2;
qset->max_burst = 1;
}
qset->qh.info1 = cpu_to_le32(
QH_INFO1_EP(usb_pipeendpoint(urb->pipe))
| (is_out ? QH_INFO1_DIR_OUT : QH_INFO1_DIR_IN)
| usb_pipe_to_qh_type(urb->pipe)
| QH_INFO1_DEV_INFO_IDX(wusb_port_no_to_idx(usb_dev->portnum))
| QH_INFO1_MAX_PKT_LEN(usb_maxpacket(urb->dev, urb->pipe, is_out))
);
qset->qh.info2 = cpu_to_le32(
QH_INFO2_BURST(qset->max_burst)
| QH_INFO2_DBP(0)
| QH_INFO2_MAX_COUNT(3)
| QH_INFO2_MAX_RETRY(3)
| QH_INFO2_MAX_SEQ(qset->max_seq - 1)
);
/* FIXME: where can we obtain these Tx parameters from? Why
* doesn't the chip know what Tx power to use? It knows the Rx
* strength and can presumably guess the Tx power required
* from that? */
qset->qh.info3 = cpu_to_le32(
QH_INFO3_TX_RATE_53_3
| QH_INFO3_TX_PWR(0) /* 0 == max power */
);
}
/**
* qset_clear - clear fields in a qset so it may be reinserted into a
* schedule
*/
void qset_clear(struct whc *whc, struct whc_qset *qset)
{
qset->td_start = qset->td_end = qset->ntds = 0;
qset->remove = 0;
qset->qh.link = cpu_to_le32(QH_LINK_NTDS(8) | QH_LINK_T);
qset->qh.status = cpu_to_le16(QH_STATUS_ICUR(qset->td_start));
qset->qh.err_count = 0;
qset->qh.cur_window = cpu_to_le32((1 << qset->max_burst) - 1);
qset->qh.scratch[0] = 0;
qset->qh.scratch[1] = 0;
qset->qh.scratch[2] = 0;
memset(&qset->qh.overlay, 0, sizeof(qset->qh.overlay));
init_completion(&qset->remove_complete);
}
/**
* get_qset - get the qset for an async endpoint
*
* A new qset is created if one does not already exist.
*/
struct whc_qset *get_qset(struct whc *whc, struct urb *urb,
gfp_t mem_flags)
{
struct whc_qset *qset;
qset = urb->ep->hcpriv;
if (qset == NULL) {
qset = qset_alloc(whc, mem_flags);
if (qset == NULL)
return NULL;
qset->ep = urb->ep;
urb->ep->hcpriv = qset;
qset_fill_qh(qset, urb);
}
return qset;
}
void qset_remove_complete(struct whc *whc, struct whc_qset *qset)
{
list_del_init(&qset->list_node);
complete(&qset->remove_complete);
}
/**
* qset_add_qtds - add qTDs for an URB to a qset
*
* Returns true if the list (ASL/PZL) must be updated because (for a
* WHCI 0.95 controller) an activated qTD was pointed to be iCur.
*/
enum whc_update qset_add_qtds(struct whc *whc, struct whc_qset *qset)
{
struct whc_std *std;
enum whc_update update = 0;
list_for_each_entry(std, &qset->stds, list_node) {
struct whc_qtd *qtd;
uint32_t status;
if (qset->ntds >= WHCI_QSET_TD_MAX
|| (qset->pause_after_urb && std->urb != qset->pause_after_urb))
break;
if (std->qtd)
continue; /* already has a qTD */
qtd = std->qtd = &qset->qtd[qset->td_end];
/* Fill in setup bytes for control transfers. */
if (usb_pipecontrol(std->urb->pipe))
memcpy(qtd->setup, std->urb->setup_packet, 8);
status = QTD_STS_ACTIVE | QTD_STS_LEN(std->len);
if (whc_std_last(std) && usb_pipeout(std->urb->pipe))
status |= QTD_STS_LAST_PKT;
/*
* For an IN transfer the iAlt field should be set so
* the h/w will automatically advance to the next
* transfer. However, if there are 8 or more TDs
* remaining in this transfer then iAlt cannot be set
* as it could point to somewhere in this transfer.
*/
if (std->ntds_remaining < WHCI_QSET_TD_MAX) {
int ialt;
ialt = (qset->td_end + std->ntds_remaining) % WHCI_QSET_TD_MAX;
status |= QTD_STS_IALT(ialt);
} else if (usb_pipein(std->urb->pipe))
qset->pause_after_urb = std->urb;
if (std->num_pointers)
qtd->options = cpu_to_le32(QTD_OPT_IOC);
else
qtd->options = cpu_to_le32(QTD_OPT_IOC | QTD_OPT_SMALL);
qtd->page_list_ptr = cpu_to_le64(std->dma_addr);
qtd->status = cpu_to_le32(status);
if (QH_STATUS_TO_ICUR(qset->qh.status) == qset->td_end)
update = WHC_UPDATE_UPDATED;
if (++qset->td_end >= WHCI_QSET_TD_MAX)
qset->td_end = 0;
qset->ntds++;
}
return update;
}
/**
* qset_remove_qtd - remove the first qTD from a qset.
*
* The qTD might be still active (if it's part of a IN URB that
* resulted in a short read) so ensure it's deactivated.
*/
static void qset_remove_qtd(struct whc *whc, struct whc_qset *qset)
{
qset->qtd[qset->td_start].status = 0;
if (++qset->td_start >= WHCI_QSET_TD_MAX)
qset->td_start = 0;
qset->ntds--;
}
/**
* qset_free_std - remove an sTD and free it.
* @whc: the WHCI host controller
* @std: the sTD to remove and free.
*/
void qset_free_std(struct whc *whc, struct whc_std *std)
{
list_del(&std->list_node);
if (std->num_pointers) {
dma_unmap_single(whc->wusbhc.dev, std->dma_addr,
std->num_pointers * sizeof(struct whc_page_list_entry),
DMA_TO_DEVICE);
kfree(std->pl_virt);
}
kfree(std);
}
/**
* qset_remove_qtds - remove an URB's qTDs (and sTDs).
*/
static void qset_remove_qtds(struct whc *whc, struct whc_qset *qset,
struct urb *urb)
{
struct whc_std *std, *t;
list_for_each_entry_safe(std, t, &qset->stds, list_node) {
if (std->urb != urb)
break;
if (std->qtd != NULL)
qset_remove_qtd(whc, qset);
qset_free_std(whc, std);
}
}
/**
* qset_free_stds - free any remaining sTDs for an URB.
*/
static void qset_free_stds(struct whc_qset *qset, struct urb *urb)
{
struct whc_std *std, *t;
list_for_each_entry_safe(std, t, &qset->stds, list_node) {
if (std->urb == urb)
qset_free_std(qset->whc, std);
}
}
static int qset_fill_page_list(struct whc *whc, struct whc_std *std, gfp_t mem_flags)
{
dma_addr_t dma_addr = std->dma_addr;
dma_addr_t sp, ep;
size_t std_len = std->len;
size_t pl_len;
int p;
sp = ALIGN(dma_addr, WHCI_PAGE_SIZE);
ep = dma_addr + std_len;
std->num_pointers = DIV_ROUND_UP(ep - sp, WHCI_PAGE_SIZE);
pl_len = std->num_pointers * sizeof(struct whc_page_list_entry);
std->pl_virt = kmalloc(pl_len, mem_flags);
if (std->pl_virt == NULL)
return -ENOMEM;
std->dma_addr = dma_map_single(whc->wusbhc.dev, std->pl_virt, pl_len, DMA_TO_DEVICE);
for (p = 0; p < std->num_pointers; p++) {
std->pl_virt[p].buf_ptr = cpu_to_le64(dma_addr);
dma_addr = ALIGN(dma_addr + WHCI_PAGE_SIZE, WHCI_PAGE_SIZE);
}
return 0;
}
/**
* urb_dequeue_work - executes asl/pzl update and gives back the urb to the system.
*/
static void urb_dequeue_work(struct work_struct *work)
{
struct whc_urb *wurb = container_of(work, struct whc_urb, dequeue_work);
struct whc_qset *qset = wurb->qset;
struct whc *whc = qset->whc;
unsigned long flags;
if (wurb->is_async == true)
asl_update(whc, WUSBCMD_ASYNC_UPDATED
| WUSBCMD_ASYNC_SYNCED_DB
| WUSBCMD_ASYNC_QSET_RM);
else
pzl_update(whc, WUSBCMD_PERIODIC_UPDATED
| WUSBCMD_PERIODIC_SYNCED_DB
| WUSBCMD_PERIODIC_QSET_RM);
spin_lock_irqsave(&whc->lock, flags);
qset_remove_urb(whc, qset, wurb->urb, wurb->status);
spin_unlock_irqrestore(&whc->lock, flags);
}
/**
* qset_add_urb - add an urb to the qset's queue.
*
* The URB is chopped into sTDs, one for each qTD that will required.
* At least one qTD (and sTD) is required even if the transfer has no
* data (e.g., for some control transfers).
*/
int qset_add_urb(struct whc *whc, struct whc_qset *qset, struct urb *urb,
gfp_t mem_flags)
{
struct whc_urb *wurb;
int remaining = urb->transfer_buffer_length;
u64 transfer_dma = urb->transfer_dma;
int ntds_remaining;
ntds_remaining = DIV_ROUND_UP(remaining, QTD_MAX_XFER_SIZE);
if (ntds_remaining == 0)
ntds_remaining = 1;
wurb = kzalloc(sizeof(struct whc_urb), mem_flags);
if (wurb == NULL)
goto err_no_mem;
urb->hcpriv = wurb;
wurb->qset = qset;
wurb->urb = urb;
INIT_WORK(&wurb->dequeue_work, urb_dequeue_work);
while (ntds_remaining) {
struct whc_std *std;
size_t std_len;
std = kmalloc(sizeof(struct whc_std), mem_flags);
if (std == NULL)
goto err_no_mem;
std_len = remaining;
if (std_len > QTD_MAX_XFER_SIZE)
std_len = QTD_MAX_XFER_SIZE;
std->urb = urb;
std->dma_addr = transfer_dma;
std->len = std_len;
std->ntds_remaining = ntds_remaining;
std->qtd = NULL;
INIT_LIST_HEAD(&std->list_node);
list_add_tail(&std->list_node, &qset->stds);
if (std_len > WHCI_PAGE_SIZE) {
if (qset_fill_page_list(whc, std, mem_flags) < 0)
goto err_no_mem;
} else
std->num_pointers = 0;
ntds_remaining--;
remaining -= std_len;
transfer_dma += std_len;
}
return 0;
err_no_mem:
qset_free_stds(qset, urb);
return -ENOMEM;
}
/**
* qset_remove_urb - remove an URB from the urb queue.
*
* The URB is returned to the USB subsystem.
*/
void qset_remove_urb(struct whc *whc, struct whc_qset *qset,
struct urb *urb, int status)
{
struct wusbhc *wusbhc = &whc->wusbhc;
struct whc_urb *wurb = urb->hcpriv;
usb_hcd_unlink_urb_from_ep(&wusbhc->usb_hcd, urb);
/* Drop the lock as urb->complete() may enqueue another urb. */
spin_unlock(&whc->lock);
wusbhc_giveback_urb(wusbhc, urb, status);
spin_lock(&whc->lock);
kfree(wurb);
}
/**
* get_urb_status_from_qtd - get the completed urb status from qTD status
* @urb: completed urb
* @status: qTD status
*/
static int get_urb_status_from_qtd(struct urb *urb, u32 status)
{
if (status & QTD_STS_HALTED) {
if (status & QTD_STS_DBE)
return usb_pipein(urb->pipe) ? -ENOSR : -ECOMM;
else if (status & QTD_STS_BABBLE)
return -EOVERFLOW;
else if (status & QTD_STS_RCE)
return -ETIME;
return -EPIPE;
}
if (usb_pipein(urb->pipe)
&& (urb->transfer_flags & URB_SHORT_NOT_OK)
&& urb->actual_length < urb->transfer_buffer_length)
return -EREMOTEIO;
return 0;
}
/**
* process_inactive_qtd - process an inactive (but not halted) qTD.
*
* Update the urb with the transfer bytes from the qTD, if the urb is
* completely transfered or (in the case of an IN only) the LPF is
* set, then the transfer is complete and the urb should be returned
* to the system.
*/
void process_inactive_qtd(struct whc *whc, struct whc_qset *qset,
struct whc_qtd *qtd)
{
struct whc_std *std = list_first_entry(&qset->stds, struct whc_std, list_node);
struct urb *urb = std->urb;
uint32_t status;
bool complete;
status = le32_to_cpu(qtd->status);
urb->actual_length += std->len - QTD_STS_TO_LEN(status);
if (usb_pipein(urb->pipe) && (status & QTD_STS_LAST_PKT))
complete = true;
else
complete = whc_std_last(std);
qset_remove_qtd(whc, qset);
qset_free_std(whc, std);
/*
* Transfers for this URB are complete? Then return it to the
* USB subsystem.
*/
if (complete) {
qset_remove_qtds(whc, qset, urb);
qset_remove_urb(whc, qset, urb, get_urb_status_from_qtd(urb, status));
/*
* If iAlt isn't valid then the hardware didn't
* advance iCur. Adjust the start and end pointers to
* match iCur.
*/
if (!(status & QTD_STS_IALT_VALID))
qset->td_start = qset->td_end
= QH_STATUS_TO_ICUR(le16_to_cpu(qset->qh.status));
qset->pause_after_urb = NULL;
}
}
/**
* process_halted_qtd - process a qset with a halted qtd
*
* Remove all the qTDs for the failed URB and return the failed URB to
* the USB subsystem. Then remove all other qTDs so the qset can be
* removed.
*
* FIXME: this is the point where rate adaptation can be done. If a
* transfer failed because it exceeded the maximum number of retries
* then it could be reactivated with a slower rate without having to
* remove the qset.
*/
void process_halted_qtd(struct whc *whc, struct whc_qset *qset,
struct whc_qtd *qtd)
{
struct whc_std *std = list_first_entry(&qset->stds, struct whc_std, list_node);
struct urb *urb = std->urb;
int urb_status;
urb_status = get_urb_status_from_qtd(urb, le32_to_cpu(qtd->status));
qset_remove_qtds(whc, qset, urb);
qset_remove_urb(whc, qset, urb, urb_status);
list_for_each_entry(std, &qset->stds, list_node) {
if (qset->ntds == 0)
break;
qset_remove_qtd(whc, qset);
std->qtd = NULL;
}
qset->remove = 1;
}
void qset_free(struct whc *whc, struct whc_qset *qset)
{
dma_pool_free(whc->qset_pool, qset, qset->qset_dma);
}
/**
* qset_delete - wait for a qset to be unused, then free it.
*/
void qset_delete(struct whc *whc, struct whc_qset *qset)
{
wait_for_completion(&qset->remove_complete);
qset_free(whc, qset);
}
drivers/usb/host/whci/whcd.h 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) private header.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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.
*/
#ifndef __WHCD_H
#define __WHCD_H
#include <linux/uwb/whci.h>
#include <linux/workqueue.h>
#include "whci-hc.h"
/* Generic command timeout. */
#define WHC_GENCMD_TIMEOUT_MS 100
struct whc {
struct wusbhc wusbhc;
struct umc_dev *umc;
resource_size_t base_phys;
void __iomem *base;
int irq;
u8 n_devices;
u8 n_keys;
u8 n_mmc_ies;
u64 *pz_list;
struct dn_buf_entry *dn_buf;
struct di_buf_entry *di_buf;
dma_addr_t pz_list_dma;
dma_addr_t dn_buf_dma;
dma_addr_t di_buf_dma;
spinlock_t lock;
struct mutex mutex;
void * gen_cmd_buf;
dma_addr_t gen_cmd_buf_dma;
wait_queue_head_t cmd_wq;
struct workqueue_struct *workqueue;
struct work_struct dn_work;
struct dma_pool *qset_pool;
struct list_head async_list;
struct list_head async_removed_list;
wait_queue_head_t async_list_wq;
struct work_struct async_work;
struct list_head periodic_list[5];
struct list_head periodic_removed_list;
wait_queue_head_t periodic_list_wq;
struct work_struct periodic_work;
};
#define wusbhc_to_whc(w) (container_of((w), struct whc, wusbhc))
/**
* struct whc_std - a software TD.
* @urb: the URB this sTD is for.
* @offset: start of the URB's data for this TD.
* @len: the length of data in the associated TD.
* @ntds_remaining: number of TDs (starting from this one) in this transfer.
*
* Queued URBs may require more TDs than are available in a qset so we
* use a list of these "software TDs" (sTDs) to hold per-TD data.
*/
struct whc_std {
struct urb *urb;
size_t len;
int ntds_remaining;
struct whc_qtd *qtd;
struct list_head list_node;
int num_pointers;
dma_addr_t dma_addr;
struct whc_page_list_entry *pl_virt;
};
/**
* struct whc_urb - per URB host controller structure.
* @urb: the URB this struct is for.
* @qset: the qset associated to the URB.
* @dequeue_work: the work to remove the URB when dequeued.
* @is_async: the URB belongs to async sheduler or not.
* @status: the status to be returned when calling wusbhc_giveback_urb.
*/
struct whc_urb {
struct urb *urb;
struct whc_qset *qset;
struct work_struct dequeue_work;
bool is_async;
int status;
};
/**
* whc_std_last - is this sTD the URB's last?
* @std: the sTD to check.
*/
static inline bool whc_std_last(struct whc_std *std)
{
return std->ntds_remaining <= 1;
}
enum whc_update {
WHC_UPDATE_ADDED = 0x01,
WHC_UPDATE_REMOVED = 0x02,
WHC_UPDATE_UPDATED = 0x04,
};
/* init.c */
int whc_init(struct whc *whc);
void whc_clean_up(struct whc *whc);
/* hw.c */
void whc_write_wusbcmd(struct whc *whc, u32 mask, u32 val);
int whc_do_gencmd(struct whc *whc, u32 cmd, u32 params, void *addr, size_t len);
/* wusb.c */
int whc_wusbhc_start(struct wusbhc *wusbhc);
void whc_wusbhc_stop(struct wusbhc *wusbhc);
int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
u8 handle, struct wuie_hdr *wuie);
int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle);
int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm);
int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev);
int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots);
int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
const void *ptk, size_t key_size);
int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
const void *gtk, size_t key_size);
int whc_set_cluster_id(struct whc *whc, u8 bcid);
/* int.c */
irqreturn_t whc_int_handler(struct usb_hcd *hcd);
void whc_dn_work(struct work_struct *work);
/* asl.c */
void asl_start(struct whc *whc);
void asl_stop(struct whc *whc);
int asl_init(struct whc *whc);
void asl_clean_up(struct whc *whc);
int asl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags);
int asl_urb_dequeue(struct whc *whc, struct urb *urb, int status);
void asl_qset_delete(struct whc *whc, struct whc_qset *qset);
void scan_async_work(struct work_struct *work);
/* pzl.c */
int pzl_init(struct whc *whc);
void pzl_clean_up(struct whc *whc);
void pzl_start(struct whc *whc);
void pzl_stop(struct whc *whc);
int pzl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags);
int pzl_urb_dequeue(struct whc *whc, struct urb *urb, int status);
void pzl_qset_delete(struct whc *whc, struct whc_qset *qset);
void scan_periodic_work(struct work_struct *work);
/* qset.c */
struct whc_qset *qset_alloc(struct whc *whc, gfp_t mem_flags);
void qset_free(struct whc *whc, struct whc_qset *qset);
struct whc_qset *get_qset(struct whc *whc, struct urb *urb, gfp_t mem_flags);
void qset_delete(struct whc *whc, struct whc_qset *qset);
void qset_clear(struct whc *whc, struct whc_qset *qset);
int qset_add_urb(struct whc *whc, struct whc_qset *qset, struct urb *urb,
gfp_t mem_flags);
void qset_free_std(struct whc *whc, struct whc_std *std);
void qset_remove_urb(struct whc *whc, struct whc_qset *qset,
struct urb *urb, int status);
void process_halted_qtd(struct whc *whc, struct whc_qset *qset,
struct whc_qtd *qtd);
void process_inactive_qtd(struct whc *whc, struct whc_qset *qset,
struct whc_qtd *qtd);
enum whc_update qset_add_qtds(struct whc *whc, struct whc_qset *qset);
void qset_remove_complete(struct whc *whc, struct whc_qset *qset);
void dump_qset(struct whc_qset *qset, struct device *dev);
void pzl_update(struct whc *whc, uint32_t wusbcmd);
void asl_update(struct whc *whc, uint32_t wusbcmd);
#endif /* #ifndef __WHCD_H */
drivers/usb/host/whci/whci-hc.h 0 → 100644
浏览文件 @ 9779a832
/*
* Wireless Host Controller (WHC) data structures.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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.
*/
#ifndef _WHCI_WHCI_HC_H
#define _WHCI_WHCI_HC_H
#include <linux/list.h>
/**
* WHCI_PAGE_SIZE - page size use by WHCI
*
* WHCI assumes that host system uses pages of 4096 octets.
*/
#define WHCI_PAGE_SIZE 4096
/**
* QTD_MAX_TXFER_SIZE - max number of bytes to transfer with a single
* qtd.
*
* This is 2^20 - 1.
*/
#define QTD_MAX_XFER_SIZE 1048575
/**
* struct whc_qtd - Queue Element Transfer Descriptors (qTD)
*
* This describes the data for a bulk, control or interrupt transfer.
*
* [WHCI] section 3.2.4
*/
struct whc_qtd {
__le32 status; /*< remaining transfer len and transfer status */
__le32 options;
__le64 page_list_ptr; /*< physical pointer to data buffer page list*/
__u8 setup[8]; /*< setup data for control transfers */
} __attribute__((packed));
#define QTD_STS_ACTIVE (1 << 31) /* enable execution of transaction */
#define QTD_STS_HALTED (1 << 30) /* transfer halted */
#define QTD_STS_DBE (1 << 29) /* data buffer error */
#define QTD_STS_BABBLE (1 << 28) /* babble detected */
#define QTD_STS_RCE (1 << 27) /* retry count exceeded */
#define QTD_STS_LAST_PKT (1 << 26) /* set Last Packet Flag in WUSB header */
#define QTD_STS_INACTIVE (1 << 25) /* queue set is marked inactive */
#define QTD_STS_IALT_VALID (1 << 23) /* iAlt field is valid */
#define QTD_STS_IALT(i) (QTD_STS_IALT_VALID | ((i) << 20)) /* iAlt field */
#define QTD_STS_LEN(l) ((l) << 0) /* transfer length */
#define QTD_STS_TO_LEN(s) ((s) & 0x000fffff)
#define QTD_OPT_IOC (1 << 1) /* page_list_ptr points to buffer directly */
#define QTD_OPT_SMALL (1 << 0) /* interrupt on complete */
/**
* struct whc_itd - Isochronous Queue Element Transfer Descriptors (iTD)
*
* This describes the data and other parameters for an isochronous
* transfer.
*
* [WHCI] section 3.2.5
*/
struct whc_itd {
__le16 presentation_time; /*< presentation time for OUT transfers */
__u8 num_segments; /*< number of data segments in segment list */
__u8 status; /*< command execution status */
__le32 options; /*< misc transfer options */
__le64 page_list_ptr; /*< physical pointer to data buffer page list */
__le64 seg_list_ptr; /*< physical pointer to segment list */
} __attribute__((packed));
#define ITD_STS_ACTIVE (1 << 7) /* enable execution of transaction */
#define ITD_STS_DBE (1 << 5) /* data buffer error */
#define ITD_STS_BABBLE (1 << 4) /* babble detected */
#define ITD_STS_INACTIVE (1 << 1) /* queue set is marked inactive */
#define ITD_OPT_IOC (1 << 1) /* interrupt on complete */
#define ITD_OPT_SMALL (1 << 0) /* page_list_ptr points to buffer directly */
/**
* Page list entry.
*
* A TD's page list must contain sufficient page list entries for the
* total data length in the TD.
*
* [WHCI] section 3.2.4.3
*/
struct whc_page_list_entry {
__le64 buf_ptr; /*< physical pointer to buffer */
} __attribute__((packed));
/**
* struct whc_seg_list_entry - Segment list entry.
*
* Describes a portion of the data buffer described in the containing
* qTD's page list.
*
* seg_ptr = qtd->page_list_ptr[qtd->seg_list_ptr[seg].idx].buf_ptr
* + qtd->seg_list_ptr[seg].offset;
*
* Segments can't cross page boundries.
*
* [WHCI] section 3.2.5.5
*/
struct whc_seg_list_entry {
__le16 len; /*< segment length */
__u8 idx; /*< index into page list */
__u8 status; /*< segment status */
__le16 offset; /*< 12 bit offset into page */
} __attribute__((packed));
/**
* struct whc_qhead - endpoint and status information for a qset.
*
* [WHCI] section 3.2.6
*/
struct whc_qhead {
__le64 link; /*< next qset in list */
__le32 info1;
__le32 info2;
__le32 info3;
__le16 status;
__le16 err_count; /*< transaction error count */
__le32 cur_window;
__le32 scratch[3]; /*< h/w scratch area */
union {
struct whc_qtd qtd;
struct whc_itd itd;
} overlay;
} __attribute__((packed));
#define QH_LINK_PTR_MASK (~0x03Full)
#define QH_LINK_PTR(ptr) ((ptr) & QH_LINK_PTR_MASK)
#define QH_LINK_IQS (1 << 4) /* isochronous queue set */
#define QH_LINK_NTDS(n) (((n) - 1) << 1) /* number of TDs in queue set */
#define QH_LINK_T (1 << 0) /* last queue set in periodic schedule list */
#define QH_INFO1_EP(e) ((e) << 0) /* endpoint number */
#define QH_INFO1_DIR_IN (1 << 4) /* IN transfer */
#define QH_INFO1_DIR_OUT (0 << 4) /* OUT transfer */
#define QH_INFO1_TR_TYPE_CTRL (0x0 << 5) /* control transfer */
#define QH_INFO1_TR_TYPE_ISOC (0x1 << 5) /* isochronous transfer */
#define QH_INFO1_TR_TYPE_BULK (0x2 << 5) /* bulk transfer */
#define QH_INFO1_TR_TYPE_INT (0x3 << 5) /* interrupt */
#define QH_INFO1_TR_TYPE_LP_INT (0x7 << 5) /* low power interrupt */
#define QH_INFO1_DEV_INFO_IDX(i) ((i) << 8) /* index into device info buffer */
#define QH_INFO1_SET_INACTIVE (1 << 15) /* set inactive after transfer */
#define QH_INFO1_MAX_PKT_LEN(l) ((l) << 16) /* maximum packet length */
#define QH_INFO2_BURST(b) ((b) << 0) /* maximum burst length */
#define QH_INFO2_DBP(p) ((p) << 5) /* data burst policy (see [WUSB] table 5-7) */
#define QH_INFO2_MAX_COUNT(c) ((c) << 8) /* max isoc/int pkts per zone */
#define QH_INFO2_RQS (1 << 15) /* reactivate queue set */
#define QH_INFO2_MAX_RETRY(r) ((r) << 16) /* maximum transaction retries */
#define QH_INFO2_MAX_SEQ(s) ((s) << 20) /* maximum sequence number */
#define QH_INFO3_MAX_DELAY(d) ((d) << 0) /* maximum stream delay in 125 us units (isoc only) */
#define QH_INFO3_INTERVAL(i) ((i) << 16) /* segment interval in 125 us units (isoc only) */
#define QH_INFO3_TX_RATE_53_3 (0 << 24)
#define QH_INFO3_TX_RATE_80 (1 << 24)
#define QH_INFO3_TX_RATE_106_7 (2 << 24)
#define QH_INFO3_TX_RATE_160 (3 << 24)
#define QH_INFO3_TX_RATE_200 (4 << 24)
#define QH_INFO3_TX_RATE_320 (5 << 24)
#define QH_INFO3_TX_RATE_400 (6 << 24)
#define QH_INFO3_TX_RATE_480 (7 << 24)
#define QH_INFO3_TX_PWR(p) ((p) << 29) /* transmit power (see [WUSB] section 5.2.1.2) */
#define QH_STATUS_FLOW_CTRL (1 << 15)
#define QH_STATUS_ICUR(i) ((i) << 5)
#define QH_STATUS_TO_ICUR(s) (((s) >> 5) & 0x7)
/**
* usb_pipe_to_qh_type - USB core pipe type to QH transfer type
*
* Returns the QH type field for a USB core pipe type.
*/
static inline unsigned usb_pipe_to_qh_type(unsigned pipe)
{
static const unsigned type[] = {
[PIPE_ISOCHRONOUS] = QH_INFO1_TR_TYPE_ISOC,
[PIPE_INTERRUPT] = QH_INFO1_TR_TYPE_INT,
[PIPE_CONTROL] = QH_INFO1_TR_TYPE_CTRL,
[PIPE_BULK] = QH_INFO1_TR_TYPE_BULK,
};
return type[usb_pipetype(pipe)];
}
/**
* Maxiumum number of TDs in a qset.
*/
#define WHCI_QSET_TD_MAX 8
/**
* struct whc_qset - WUSB data transfers to a specific endpoint
* @qh: the QHead of this qset
* @qtd: up to 8 qTDs (for qsets for control, bulk and interrupt
* transfers)
* @itd: up to 8 iTDs (for qsets for isochronous transfers)
* @qset_dma: DMA address for this qset
* @whc: WHCI HC this qset is for
* @ep: endpoint
* @stds: list of sTDs queued to this qset
* @ntds: number of qTDs queued (not necessarily the same as nTDs
* field in the QH)
* @td_start: index of the first qTD in the list
* @td_end: index of next free qTD in the list (provided
* ntds < WHCI_QSET_TD_MAX)
*
* Queue Sets (qsets) are added to the asynchronous schedule list
* (ASL) or the periodic zone list (PZL).
*
* qsets may contain up to 8 TDs (either qTDs or iTDs as appropriate).
* Each TD may refer to at most 1 MiB of data. If a single transfer
* has > 8MiB of data, TDs can be reused as they are completed since
* the TD list is used as a circular buffer. Similarly, several
* (smaller) transfers may be queued in a qset.
*
* WHCI controllers may cache portions of the qsets in the ASL and
* PZL, requiring the WHCD to inform the WHC that the lists have been
* updated (fields changed or qsets inserted or removed). For safe
* insertion and removal of qsets from the lists the schedule must be
* stopped to avoid races in updating the QH link pointers.
*
* Since the HC is free to execute qsets in any order, all transfers
* to an endpoint should use the same qset to ensure transfers are
* executed in the order they're submitted.
*
* [WHCI] section 3.2.3
*/
struct whc_qset {
struct whc_qhead qh;
union {
struct whc_qtd qtd[WHCI_QSET_TD_MAX];
struct whc_itd itd[WHCI_QSET_TD_MAX];
};
/* private data for WHCD */
dma_addr_t qset_dma;
struct whc *whc;
struct usb_host_endpoint *ep;
struct list_head stds;
int ntds;
int td_start;
int td_end;
struct list_head list_node;
unsigned in_sw_list:1;
unsigned in_hw_list:1;
unsigned remove:1;
struct urb *pause_after_urb;
struct completion remove_complete;
int max_burst;
int max_seq;
};
static inline void whc_qset_set_link_ptr(u64 *ptr, u64 target)
{
if (target)
*ptr = (*ptr & ~(QH_LINK_PTR_MASK | QH_LINK_T)) | QH_LINK_PTR(target);
else
*ptr = QH_LINK_T;
}
/**
* struct di_buf_entry - Device Information (DI) buffer entry.
*
* There's one of these per connected device.
*/
struct di_buf_entry {
__le32 availability_info[8]; /*< MAS availability information, one MAS per bit */
__le32 addr_sec_info; /*< addressing and security info */
__le32 reserved[7];
} __attribute__((packed));
#define WHC_DI_SECURE (1 << 31)
#define WHC_DI_DISABLE (1 << 30)
#define WHC_DI_KEY_IDX(k) ((k) << 8)
#define WHC_DI_KEY_IDX_MASK 0x0000ff00
#define WHC_DI_DEV_ADDR(a) ((a) << 0)
#define WHC_DI_DEV_ADDR_MASK 0x000000ff
/**
* struct dn_buf_entry - Device Notification (DN) buffer entry.
*
* [WHCI] section 3.2.8
*/
struct dn_buf_entry {
__u8 msg_size; /*< number of octets of valid DN data */
__u8 reserved1;
__u8 src_addr; /*< source address */
__u8 status; /*< buffer entry status */
__le32 tkid; /*< TKID for source device, valid if secure bit is set */
__u8 dn_data[56]; /*< up to 56 octets of DN data */
} __attribute__((packed));
#define WHC_DN_STATUS_VALID (1 << 7) /* buffer entry is valid */
#define WHC_DN_STATUS_SECURE (1 << 6) /* notification received using secure frame */
#define WHC_N_DN_ENTRIES (4096 / sizeof(struct dn_buf_entry))
/* The Add MMC IE WUSB Generic Command may take up to 256 bytes of
data. [WHCI] section 2.4.7. */
#define WHC_GEN_CMD_DATA_LEN 256
/*
* HC registers.
*
* [WHCI] section 2.4
*/
#define WHCIVERSION 0x00
#define WHCSPARAMS 0x04
# define WHCSPARAMS_TO_N_MMC_IES(p) (((p) >> 16) & 0xff)
# define WHCSPARAMS_TO_N_KEYS(p) (((p) >> 8) & 0xff)
# define WHCSPARAMS_TO_N_DEVICES(p) (((p) >> 0) & 0x7f)
#define WUSBCMD 0x08
# define WUSBCMD_BCID(b) ((b) << 16)
# define WUSBCMD_BCID_MASK (0xff << 16)
# define WUSBCMD_ASYNC_QSET_RM (1 << 12)
# define WUSBCMD_PERIODIC_QSET_RM (1 << 11)
# define WUSBCMD_WUSBSI(s) ((s) << 8)
# define WUSBCMD_WUSBSI_MASK (0x7 << 8)
# define WUSBCMD_ASYNC_SYNCED_DB (1 << 7)
# define WUSBCMD_PERIODIC_SYNCED_DB (1 << 6)
# define WUSBCMD_ASYNC_UPDATED (1 << 5)
# define WUSBCMD_PERIODIC_UPDATED (1 << 4)
# define WUSBCMD_ASYNC_EN (1 << 3)
# define WUSBCMD_PERIODIC_EN (1 << 2)
# define WUSBCMD_WHCRESET (1 << 1)
# define WUSBCMD_RUN (1 << 0)
#define WUSBSTS 0x0c
# define WUSBSTS_ASYNC_SCHED (1 << 15)
# define WUSBSTS_PERIODIC_SCHED (1 << 14)
# define WUSBSTS_DNTS_SCHED (1 << 13)
# define WUSBSTS_HCHALTED (1 << 12)
# define WUSBSTS_GEN_CMD_DONE (1 << 9)
# define WUSBSTS_CHAN_TIME_ROLLOVER (1 << 8)
# define WUSBSTS_DNTS_OVERFLOW (1 << 7)
# define WUSBSTS_BPST_ADJUSTMENT_CHANGED (1 << 6)
# define WUSBSTS_HOST_ERR (1 << 5)
# define WUSBSTS_ASYNC_SCHED_SYNCED (1 << 4)
# define WUSBSTS_PERIODIC_SCHED_SYNCED (1 << 3)
# define WUSBSTS_DNTS_INT (1 << 2)
# define WUSBSTS_ERR_INT (1 << 1)
# define WUSBSTS_INT (1 << 0)
# define WUSBSTS_INT_MASK 0x3ff
#define WUSBINTR 0x10
# define WUSBINTR_GEN_CMD_DONE (1 << 9)
# define WUSBINTR_CHAN_TIME_ROLLOVER (1 << 8)
# define WUSBINTR_DNTS_OVERFLOW (1 << 7)
# define WUSBINTR_BPST_ADJUSTMENT_CHANGED (1 << 6)
# define WUSBINTR_HOST_ERR (1 << 5)
# define WUSBINTR_ASYNC_SCHED_SYNCED (1 << 4)
# define WUSBINTR_PERIODIC_SCHED_SYNCED (1 << 3)
# define WUSBINTR_DNTS_INT (1 << 2)
# define WUSBINTR_ERR_INT (1 << 1)
# define WUSBINTR_INT (1 << 0)
# define WUSBINTR_ALL 0x3ff
#define WUSBGENCMDSTS 0x14
# define WUSBGENCMDSTS_ACTIVE (1 << 31)
# define WUSBGENCMDSTS_ERROR (1 << 24)
# define WUSBGENCMDSTS_IOC (1 << 23)
# define WUSBGENCMDSTS_MMCIE_ADD 0x01
# define WUSBGENCMDSTS_MMCIE_RM 0x02
# define WUSBGENCMDSTS_SET_MAS 0x03
# define WUSBGENCMDSTS_CHAN_STOP 0x04
# define WUSBGENCMDSTS_RWP_EN 0x05
#define WUSBGENCMDPARAMS 0x18
#define WUSBGENADDR 0x20
#define WUSBASYNCLISTADDR 0x28
#define WUSBDNTSBUFADDR 0x30
#define WUSBDEVICEINFOADDR 0x38
#define WUSBSETSECKEYCMD 0x40
# define WUSBSETSECKEYCMD_SET (1 << 31)
# define WUSBSETSECKEYCMD_ERASE (1 << 30)
# define WUSBSETSECKEYCMD_GTK (1 << 8)
# define WUSBSETSECKEYCMD_IDX(i) ((i) << 0)
#define WUSBTKID 0x44
#define WUSBSECKEY 0x48
#define WUSBPERIODICLISTBASE 0x58
#define WUSBMASINDEX 0x60
#define WUSBDNTSCTRL 0x64
# define WUSBDNTSCTRL_ACTIVE (1 << 31)
# define WUSBDNTSCTRL_INTERVAL(i) ((i) << 8)
# define WUSBDNTSCTRL_SLOTS(s) ((s) << 0)
#define WUSBTIME 0x68
#define WUSBBPST 0x6c
#define WUSBDIBUPDATED 0x70
#endif /* #ifndef _WHCI_WHCI_HC_H */
drivers/usb/host/whci/wusb.c 0 → 100644
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/*
* Wireless Host Controller (WHC) WUSB operations.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/uwb/umc.h>
#define D_LOCAL 1
#include <linux/uwb/debug.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
#if D_LOCAL >= 1
static void dump_di(struct whc *whc, int idx)
{
struct di_buf_entry *di = &whc->di_buf[idx];
struct device *dev = &whc->umc->dev;
char buf[128];
bitmap_scnprintf(buf, sizeof(buf), (unsigned long *)di->availability_info, UWB_NUM_MAS);
d_printf(1, dev, "DI[%d]\n", idx);
d_printf(1, dev, " availability: %s\n", buf);
d_printf(1, dev, " %c%c key idx: %d dev addr: %d\n",
(di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
(di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
(di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
(di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
}
#else
static inline void dump_di(struct whc *whc, int idx)
{
}
#endif
static int whc_update_di(struct whc *whc, int idx)
{
int offset = idx / 32;
u32 bit = 1 << (idx % 32);
dump_di(whc, idx);
le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
return whci_wait_for(&whc->umc->dev,
whc->base + WUSBDIBUPDATED + offset, bit, 0,
100, "DI update");
}
/*
* WHCI starts and stops MMCs based on there being a valid GTK so
* these need only start/stop the asynchronous and periodic schedules.
*/
int whc_wusbhc_start(struct wusbhc *wusbhc)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
asl_start(whc);
pzl_start(whc);
return 0;
}
void whc_wusbhc_stop(struct wusbhc *wusbhc)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
pzl_stop(whc);
asl_stop(whc);
}
int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
u8 handle, struct wuie_hdr *wuie)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 params;
params = (interval << 24)
| (repeat_cnt << 16)
| (wuie->bLength << 8)
| handle;
return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
}
int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 params;
params = handle;
return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
}
int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
if (stream_index >= 0)
whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
}
int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
int idx = wusb_dev->port_idx;
struct di_buf_entry *di = &whc->di_buf[idx];
int ret;
mutex_lock(&whc->mutex);
uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
ret = whc_update_di(whc, idx);
mutex_unlock(&whc->mutex);
return ret;
}
/*
* Set the number of Device Notification Time Slots (DNTS) and enable
* device notifications.
*/
int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 dntsctrl;
dntsctrl = WUSBDNTSCTRL_ACTIVE
| WUSBDNTSCTRL_INTERVAL(interval)
| WUSBDNTSCTRL_SLOTS(slots);
le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
return 0;
}
static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
const void *key, size_t key_size, bool is_gtk)
{
uint32_t setkeycmd;
uint32_t seckey[4];
int i;
int ret;
memcpy(seckey, key, key_size);
setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
if (is_gtk)
setkeycmd |= WUSBSETSECKEYCMD_GTK;
le_writel(tkid, whc->base + WUSBTKID);
for (i = 0; i < 4; i++)
le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
WUSBSETSECKEYCMD_SET, 0, 100, "set key");
return ret;
}
/**
* whc_set_ptk - set the PTK to use for a device.
*
* The index into the key table for this PTK is the same as the
* device's port index.
*/
int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
const void *ptk, size_t key_size)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
struct di_buf_entry *di = &whc->di_buf[port_idx];
int ret;
mutex_lock(&whc->mutex);
if (ptk) {
ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
if (ret)
goto out;
di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
} else
di->addr_sec_info &= ~WHC_DI_SECURE;
ret = whc_update_di(whc, port_idx);
out:
mutex_unlock(&whc->mutex);
return ret;
}
/**
* whc_set_gtk - set the GTK for subsequent broadcast packets
*
* The GTK is stored in the last entry in the key table (the previous
* N_DEVICES entries are for the per-device PTKs).
*/
int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
const void *gtk, size_t key_size)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
int ret;
mutex_lock(&whc->mutex);
ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
mutex_unlock(&whc->mutex);
return ret;
}
int whc_set_cluster_id(struct whc *whc, u8 bcid)
{
whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
return 0;
}
drivers/usb/wusbcore/Kconfig 0 → 100644
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#
# Wireless USB Core configuration
#
config USB_WUSB
tristate "Enable Wireless USB extensions (EXPERIMENTAL)"
depends on EXPERIMENTAL
depends on USB
select UWB
select CRYPTO
select CRYPTO_BLKCIPHER
select CRYPTO_CBC
select CRYPTO_MANAGER
select CRYPTO_AES
help
Enable the host-side support for Wireless USB.
To compile this support select Y (built in). It is safe to
select even if you don't have the hardware.
config USB_WUSB_CBAF
tristate "Support WUSB Cable Based Association (CBA)"
depends on USB
help
Some WUSB devices support Cable Based Association. It's used to
enable the secure communication between the host and the
device.
Enable this option if your WUSB device must to be connected
via wired USB before establishing a wireless link.
It is safe to select even if you don't have a compatible
hardware.
config USB_WUSB_CBAF_DEBUG
bool "Enable CBA debug messages"
depends on USB_WUSB_CBAF
help
Say Y here if you want the CBA to produce a bunch of debug messages
to the system log. Select this if you are having a problem with
CBA support and want to see more of what is going on.
drivers/usb/wusbcore/Makefile 0 → 100644
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obj-$(CONFIG_USB_WUSB) += wusbcore.o
obj-$(CONFIG_USB_HWA_HCD) += wusb-wa.o
obj-$(CONFIG_USB_WUSB_CBAF) += wusb-cbaf.o
wusbcore-objs := \
crypto.o \
devconnect.o \
dev-sysfs.o \
mmc.o \
pal.o \
rh.o \
reservation.o \
security.o \
wusbhc.o
wusb-cbaf-objs := cbaf.o
wusb-wa-objs := wa-hc.o \
wa-nep.o \
wa-rpipe.o \
wa-xfer.o
ifeq ($(CONFIG_USB_WUSB_CBAF_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
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drivers/uwb/i1480/Makefile 0 → 100644
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obj-$(CONFIG_UWB_I1480U) += dfu/ i1480-est.o
obj-$(CONFIG_UWB_I1480U_WLP) += i1480u-wlp/
drivers/uwb/i1480/dfu/Makefile 0 → 100644
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obj-$(CONFIG_UWB_I1480U) += i1480-dfu-usb.o
i1480-dfu-usb-objs := \
dfu.o \
mac.o \
phy.o \
usb.o
drivers/uwb/i1480/dfu/dfu.c 0 → 100644
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drivers/uwb/i1480/dfu/i1480-dfu.h 0 → 100644
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drivers/uwb/i1480/i1480u-wlp/tx.c 0 → 100644
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drivers/uwb/umc-dev.c 0 → 100644
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drivers/uwb/umc-drv.c 0 → 100644
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drivers/uwb/uwb-debug.c 0 → 100644
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drivers/uwb/uwb-internal.h 0 → 100644
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drivers/uwb/uwbd.c 0 → 100644
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drivers/uwb/whc-rc.c 0 → 100644
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drivers/uwb/whci.c 0 → 100644
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drivers/uwb/wlp/Makefile 0 → 100644
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drivers/uwb/wlp/driver.c 0 → 100644
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drivers/uwb/wlp/eda.c 0 → 100644
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drivers/uwb/wlp/messages.c 0 → 100644
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drivers/uwb/wlp/sysfs.c 0 → 100644
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drivers/uwb/wlp/txrx.c 0 → 100644
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drivers/uwb/wlp/wlp-internal.h 0 → 100644
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drivers/uwb/wlp/wlp-lc.c 0 → 100644
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drivers/uwb/wlp/wss-lc.c 0 → 100644
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include/linux/bitmap.h
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include/linux/usb/wusb-wa.h 0 → 100644
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include/linux/usb/wusb.h 0 → 100644
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include/linux/uwb.h 0 → 100644
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include/linux/uwb/debug-cmd.h 0 → 100644
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此差异已折叠。
include/linux/uwb/debug.h 0 → 100644
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include/linux/uwb/spec.h 0 → 100644
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此差异已折叠。
include/linux/uwb/umc.h 0 → 100644
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此差异已折叠。
include/linux/uwb/whci.h 0 → 100644
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此差异已折叠。
include/linux/wlp.h 0 → 100644
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此差异已折叠。
lib/bitmap.c
浏览文件 @ 9779a832
此差异已折叠。
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