- 21 Jul, 2008 40 commits
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David Brownell authored
Building on the previous patches which took code from this driver and pakaged it in more-reusable network "function" components, this patch gets rid of the original code and uses those components instead. As seen with the other gadget driver conversions, the resulting code is much easier to understand and (presumably) work with. In this case that's especially true, since the Ethernet gadget had grown to handle three (!) different Ethernet-over-USB protocols. This modularization should make it much easier to add a fourth option for the newish CDC "Ethernet Emulation Model" (or EEM). Lightly tested, primarily at full speed. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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David Brownell authored
This is a simple example of a composite gadget, combining two Communications Class Device (CDC) functions: ECM and ACM. This provides a clear example of how the composite gadget framework is intended to work. It's surprising that MS-Windows (or at least, XP and previous) won't "just work" with something this simple... One /proc/bus/usb/devices listing looks like: T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 46 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0525 ProdID=a4aa Rev= 3.01 S: Manufacturer=Linux 2.6.26-rc6-pnut with net2280 S: Product=CDC Composite Gadget C:* #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr= 2mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=cdc_ether E: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=32ms I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms I:* If#= 2 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=cdc_acm E: Ad=86(I) Atr=03(Int.) MxPS= 8 Ivl=32ms I:* If#= 3 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms Not all USB peripheral controller hardware can support this driver. All the highspeed-capable peripheral controllers with drivers now in the mainline kernel seem to support this, as does omap_udc. But many full speed controllers don't have enough endpoints, or (as with the PXA controllers) don't support altsettings. Lightly tested. Signed-off-by:
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David Brownell authored
This is a RNDIS function driver, extracted from the all-in-one Ethernet gadget driver. Lightly tested ... there seems to be a pre-existing problem when talking to Windows XP SP2, not quite sure what's up with that yet. Signed-off-by:
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David Brownell authored
This is a "CDC Ethernet" (ECM) function driver, extracted from the all-in-one Ethernet gadget driver. This is a good example of how to implement interface altsettings. In fact it's currently the only such example in the gadget stack, pending addition of OBEX support. Signed-off-by:
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David Brownell authored
This is a simple "CDC Subset" (and MCCI "SAFE") function driver, extracted from the all-in-one Ethernet gadget driver. Signed-off-by:
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David Brownell authored
Abstract the peripheral side Ethernet-over-USB link layer code from the all-in-one Ethernet gadget driver into a component that can be called by various functions, so the various flavors can be split apart and selectively reused. A notable difference from the approach taken with the serial link layer code (beyond talking to NET not TTY) is that because of the initialization requirements, this only supports one network link. (And one set of Ethernet link addresses.) That is, each configuration may have only one instance of a network function. This doesn't change behavior; the current code has that same restriction. If you want multiple logical links, that can easily be done using network layer tools. Signed-off-by:
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David Brownell authored
Some cleanup to the RNDIS code: - Minor bugfix: rndis_unit() is supposed to put the link into the RNDIS_UNINITIALIZED state, which does not mean "unused". There's a separate method to stop using the link. (Bug doesn't affect anything right now because of how the code is used.) - Reduce coupling between RNDIS code and its user(s), in preparation for updates in that code: * Decouple RNDIS_RESPONSE_AVAILABLE notifications from net_device by passing just a void* handle. (Also, remove the unused return value of the notification callback.) * When it needs a copy of net_device stats, just ask for it - Remove unused/untested code backing various never-used OIDs: * RNDIS_PM, RNDIS_WAKEUP ... "should" get implemented, but the relevant docs were unclear, ambguous, and incomplete. Someone with access to the Hidden Gospels (maybe in the EU?) might be able to figure out what this should do. * RNDIS_OPTIONAL_STATS ... as the name suggests, optional. Never implemented in part because not all the semantics were clear. * OID_GEN_RNDIS_CONFIG_PARAMETER, which has been #if 0 forever. - A few small whitespace fixes Plus switch the VERBOSE symbol over to the newer VERBOSE_DEBUG style. There should be no functional changes because of this patch; it's a net source code shrink (because of the dead/unused code removal) and a small object code shrink (a couple hundred bytes on ARMv5). Signed-off-by: -
David Brownell authored
This switches the serial gadget over to using the new "function" versions of the serial port interfacing code. The remaining code in the main source file is quite small... Signed-off-by:
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David Brownell authored
Split out the generic serial support into a "function driver". This closely mimics the ACM support, but with a MUCH simpler control model. Signed-off-by:
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David Brownell authored
Split out CDC ACM parts of "gadget serial" to a "function driver". Some key structural differences from the previous ACM support, shared with with the generic serial function (next patch): - As a function driver, it can be combined with other functions. One gadget configuration could offer both serial and network links, as an example. - One serial port can be exposed in multiple configurations; the /dev/ttyGS0 node could be exposed regardless of which config the host selected. - One configuration can expose multiple serial ports, such as ttyGS0, ttyGS1, ttyGS2, and ttyGS3. This code should be a lot easier to understand than the previous all-in-one-big-file version of the driver. Signed-off-by:
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David Brownell authored
Update Gadget Zero to use the more modular versions of the loopback and source/sink configuration drivers which build on the new gadget framework code. The core code is a LOT simpler, and it should be much easier now to understand how the parts fit together. The conversion is an overall source shrink in terms of this gadget, since it uses more midlayer support. However, it's an overall increase in object size because there's less sharing between the two configurations (improves code clarity) and because the midlayer is a bit more functional than this driver actually needs. Signed-off-by:
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David Brownell authored
This splits the gadget zero "loopback" configuration into a standalone "configuration driver", building on the composite gadget framework code. It doesn't yet pull the original code out of gadget zero or update how that driver is built. Signed-off-by:
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David Brownell authored
This splits the gadget zero "source/sink" configuration into a standalone "configuration driver", building on the composite gadget framework code. It doesn't yet pull the original code out of gadget zero or update how that driver is built. Neither this, nor its sibling "loopback" configuration, is a function driver that can be combined with other functions. (The host "usbtest" driver wouldn't know how to deal with that!) However the code becomes simpler because of this conversion, so it's a net win. Signed-off-by:
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David Brownell authored
Add <linux/usb/composite.h> interfaces for composite gadget drivers, and basic implementation support behind it: - struct usb_function ... groups one or more interfaces into a function managed as one unit within a configuration, to which it's added by usb_add_function(). - struct usb_configuration ... groups one or more such functions into a configuration managed as one unit by a driver, to which it's added by usb_add_config(). These operate at either high or full/low speeds and at a given bMaxPower. - struct usb_composite_driver ... groups one or more such configurations into a gadget driver, which may be registered or unregistered. - struct usb_composite_dev ... a usb_composite_driver manages this; it wraps the usb_gadget exposed by the controller driver. This also includes some basic kerneldoc. How to use it (the short version): provide a usb_composite_driver with a bind() that calls usb_add_config() for each of the needed configurations. The configurations in turn have bind() calls, which will usb_add_function() for each function required. Each function's bind() allocates resources needed to perform its tasks, like endpoints; sometimes configurations will allocate resources too. Separate patches will convert most gadget drivers to this infrastructure. Signed-off-by: -
David Brownell authored
Define three new descriptor manipulation utilities, for use when setting up functions that may have multiple instances: usb_copy_descriptors() to copy a vector of descriptors usb_free_descriptors() to free the copy usb_find_endpoint() to find a copied version These will be used as follows. Functions will continue to have static tables of descriptors they update, now used as __initdata templates. When a function creates a new instance, it patches those tables with relevant interface and string IDs, plus endpoint assignments. Then it copies those morphed descriptors, associates the copies with the new function instance, and records the endpoint descriptors to use when activating the endpoints. When initialization is done, only the copies remain in memory. The copies are freed on driver removal. This ensures that each instance has descriptors which hold the right instance-specific data. Two instances in the same configuration will obviously never share the same interface IDs or use the same endpoints. Instances in different configurations won't do so either, which means this is slightly less memory-efficient in some cases. This also includes a bugfix to the epautoconf code that shows up with this usage model. It must replace the previous endpoint number when updating the template descriptors, not just mask in a few more bits. Signed-off-by:
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David Brownell authored
Teach "gadget serial" to use the new abstracted (and bugfixed) TTY glue, and remove all the orignal tangled-up code. Update the documentation accordingly. This is a net object code shrink and cleanup; it should make it a lot easier to see how the TTY glue should accomodate updates to the TTY layer, be bugfixed, etc. Notable behavior changes include: it can now support getty even when there's no USB connection; it fits properly into the mdev/udev world; and RX handling is better (throttling works, and low latency). Configurations with scripts setting up the /dev/ttygserial device node (with "experimental" major number) may want to change that to be a symlink pointing to the /dev/ttyGS0 file, as a migration aid; else, just switch entirely over to mdev/udev. Signed-off-by:
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David Brownell authored
This abstracts the "gadget serial" driver TTY glue into a separate component, cleaning it up and disentangling it from connection state. It also changed some behaviors for the better: - Stops using "experimental" major #127, and switches over to having the TTY layer allocate the dev_t numbers. - Provides /sys/class/tty/ttyGS* nodes, thus mdev/udev support. (Note "mdev" hotplug bug in Busybox v1.7.2: /dev/ttyGS0 will be a *block* device without CONFIG_SYSFS_DEPRECATED_V2.) - The tty nodes no longer reject opens when there's no host. Now they can support normal getty configs in /etc/inttab... - Now implements RX throttling. When the line discipline says it doesn't want any more data, only packets in flight will be delivered (currently, max 1K/8K at full/high speeds) until it unthrottles the data. - Supports low_latency. This is a good policy for all USB serial adapters, since it eliminates scheduler overhead on RX paths. This also includes much cleanup including better comments, fixing memory leaks and other bugs (including some locking fixes), messaging cleanup, and an interface audit and tightening. This added up to a significant object code shrinkage, on the order of 20% (!) depending on CPU and compiler. A separate patch actually kicks in this new code, using the functions declared in this new header, and removes the previous glue. Signed-off-by: -
David Brownell authored
It turns out newer versions of the AT91 UDC hardware have increased sizes of some of the FIFOs. Reporting that is a Good Thing. Signed-off-by:
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Alexey Dobriyan authored
Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Adrian Bunk authored
The driver was removed before kernel 2.6.0 Signed-off-by:
Adrian Bunk <bunk@kernel.org> Signed-off-by:
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Adrian Bunk authored
This patch removes CVS keywords that weren't updated for a long time from comments. Signed-off-by:
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Alan Stern authored
This patch (as1092) implements "soft" unbinding for usb-storage. When the disconnect routine is called, all commands and reset delays are allowed to complete normally until after scsi_remove_host() returns. This means that the commands needed for an orderly shutdown will be sent through to the device. Unlike before, the driver will now execute every command that it accepts. Hence there's no need for special code to catch unexecuted commands and fail them. The new sequence of events when disconnect runs goes as follows: If the device is truly unplugged, set the DISCONNECTING flag so we won't try to access it any more. If the SCSI-scanning thread hasn't started up yet, prevent it from doing anything by setting the new DONT_SCAN flag. Then wake it up and wait for it to terminate. Remove the SCSI host. This unbinds the upper-level drivers, doing an orderly shutdown. Commands sent to quiesce the device will be transmitted normally, unless the device is unplugged. Set the DISCONNECTING flag so that we won't accept any new commands that might get submitted (there aren't supposed to be any) and we won't try to access the device for resets. Tell the control thread to exit by waking it up with no pending command, and wait for it to terminate. Go on to do all the other normal stuff: releasing resources, freeing memory, and so on. Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Alan Stern authored
This patch (as1091) changes the way usbcore handles interface unbinding. If the interface's driver supports "soft" unbinding (a new flag in the driver structure) then in-flight URBs are not cancelled and endpoints are not disabled. Instead the driver is allowed to continue communicating with the device (although of course it should stop before its disconnect routine returns). The purpose of this change is to allow drivers to do a clean shutdown when they get unbound from a device that is still plugged in. Killing all the URBs and disabling the endpoints before calling the driver's disconnect method doesn't give the driver any control over what happens, and it can leave devices in indeterminate states. For example, when usb-storage unbinds it doesn't want to stop while in the middle of transmitting a SCSI command. The soft_unbind flag is added because in the past, a number of drivers have experienced problems related to ongoing I/O after their disconnect routine returned. Hence "soft" unbinding is made available only to drivers that claim to support it. The patch also replaces "interface_to_usbdev(intf)" with "udev" in a couple of places, a minor simplification. Signed-off-by:
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Adrian Bunk authored
This patch makes the following needlessly global functions static: - enqueue_an_ATL_packet() - enqueue_an_INT_packet() Signed-off-by:
Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by:
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Alan Stern authored
This patch (as1090) converts the one remaining semaphore in usb-storage into a completion. Signed-off-by:
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Alan Stern authored
This patch (as1089) separates out the dynamic atomic bitflags and the static bitfields in usb-storage. Until now the two sorts of flags have been sharing the same word; this has always been awkward. To help prevent possible confusion, the two new fields each have a different name from the original. us->fflags contains the fixed bitfields (mostly taken from the USB ID table in unusual_devs.h), and us->dflags contains the dynamic atomic bitflags (used with set_bit, test_bit, and so on). Signed-off-by:
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Alan Cox authored
Sort out the insane naming like "OperationalFirmwareVersion" which seems designed to cause formatting problems and RSI Merge various common code together Clean up the pointlessly complex and spread about MCR handling This is really just the low hanging fruit. Needs lots of testing before it goes upstream so testers and reports appreciated Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Alan Stern authored
This patch (as1083) combines hub_quiesce() and hub_stop() into a single routine. There's no point keeping them separate since they are usually called together. Signed-off-by:
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Alan Stern authored
This patch (as1071) combines hub_activate() and hub_restart() into a single routine. There's no point keeping them separate, since they are always called together. Signed-off-by:
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Alan Stern authored
This patch (as1082) makes a small optimization to the way the hub driver carries out port debouncing immediately after a hub is activated (i.e., initialized, reset, or resumed). If any port-change statuses are observed, the code will delay for a minimal debounce period -- thereby making a good start at debouncing all the ports at once. If this wasn't sufficient then khubd will debounce any port that still requires attention. But in most cases it should suffice; it's rare for a device to need more than a minimal debounce delay. (In the cases of hub initialization or reset even that is most likely not needed, since any devices plugged in at such times have probably been attached for a while.) Signed-off-by:
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Alan Stern authored
This patch (as1073) adds to khubd a way to recover from power-session interruption caused by transient connect-change or enable-change events. After the debouncing period, khubd attempts to do a USB-Persist-style reset or reset-resume. If it works, the connection will remain unscathed. The upshot is that we will be more immune to noise caused by EMI. The grace period is on the order of 100 ms, so this won't permit recovery from the "accidentally knocked the USB cable out of its socket" type of event, but it's a start. As an added bonus, if a device was suspended when the system goes to sleep then we no longer need to check for power-session interruptions when the system wakes up. Khubd will naturally see the status change while processing the device's parent hub and will do the right thing. The remote_wakeup() routine is changed; now it expects the caller to acquire the device lock rather than acquiring the lock itself. Signed-off-by:
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Alan Stern authored
This patch (as1081) straightens out the logic of the hub_restart() routine. Each port of the hub is scanned and the driver makes sure that ports which are supposed to be disabled really _are_ disabled. Any ports with a significant change in status are flagged in hub->change_bits, so that khubd can focus on them without the need to scan all the ports a second time -- which means the hub->activating flag is no longer needed. Also, it is now recognized explicitly that the only reason for resuming a port which was not suspended is to carry out a reset-resume operation, which happens only in a non-CONFIG_USB_SUSPEND setting. Signed-off-by:
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Greg Kroah-Hartman authored
This reverts Linus's previous patch that is in mainline to make it easier for the USB hub.c patches that follow this to apply cleanly. The functionality will be added back in a followon patch in this series. Signed-off-by: -
Alan Stern authored
This patch (as1080) makes a significant change to the way khubd handles port connect-change and enable-change events. Both types of event are now debounced, and the debouncing is carried out _before_ an existing usb_device is unregistered, instead of afterward. This means that drivers will have to deal with longer runs of errors when a device is unplugged, but they are supposed to be prepared for that in any case. The advantage is that when an enable-change occurs (caused for example by electromagnetic interference), the debouncing period will provide time for the cause of the problem to die away. A simple port reset (added in a forthcoming patch) will then allow us to recover from the fault. Signed-off-by:
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Alan Stern authored
This patch (as1070) creates a new subroutine to check whether a device can be resumed. This code is needed even when CONFIG_USB_SUSPEND isn't set, because devices do suspend themselves when the root hub (and hence the entire bus) is suspended, and power sessions can get lost during a system sleep even without individual port suspends. The patch also fixes a loose end in USB-Persist reset-resume handling. When a low- or full-speed device is attached to an EHCI's companion controller, the port handoff during resume will cause the companion port's connect-status-change feature to be set. If that flag isn't cleared, the port-reset code will think it indicates that the device has been unplugged and the reset-resume will fail. Signed-off-by:
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Harvey Harrison authored
Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Kay Sievers authored
The bus_id field is going away, use the dev_set_name() function to set it properly. Signed-off-by:
Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:
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Kay Sievers authored
The bus_id field is going away, use the dev_name() function instead. Signed-off-by:
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Greg Kroah-Hartman authored
This reverts Alan's previous patch so that the recent Hub changes will apply cleanly. The above mentioned patch was needed for 2.6.26 to work properly. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Lukas Hejtmanek <xhejtman@ics.muni.cz> Signed-off-by: -
Greg Kroah-Hartman authored
This changes usb_create_hcd() to be able to handle the fact that pci_name() has changed to a constant string. Signed-off-by:
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