- 23 Sep, 2009 40 commits
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Alan Stern authored
This patch (as1283) adds a new flag, USBDEVFS_URB_BULK_CONTINUATION, to usbfs. It is intended for userspace libraries such as libusb and openusb. When they have to break up a single usbfs bulk transfer into multiple URBs, they will set the flag on all but the first URB of the series. If an error other than an unlink occurs, the kernel will automatically cancel all the following URBs for the same endpoint and refuse to accept new submissions, until an URB is encountered that is not marked as a BULK_CONTINUATION. Such an URB would indicate the start of a new transfer or the presence of an older library, so the kernel returns to normal operation. This enables libraries to delimit bulk transfers correctly, even in the presence of early termination as indicated by short packets. Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Oliver Neukum authored
This implements support for autosuspend in the sierra driver while online. Remote wakeup is used for reception. Transmission is facilitated with a queue and the asynchronous autopm mechanism. To prevent races a private flag for opened ports and a counter of running transmissions needs to be added. Signed-off-by:
Oliver Neukum <oliver@neukum.org> Tested-by:
Elina Pasheva <epasheva@sierrawireless.com> Signed-off-by:
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Jason Wessel authored
In order for the dbgp driver to survive suspend/resume, on every ehci resume operation the debug controller must get re-initialized. Signed-off-by:
Jason Wessel <jason.wessel@windriver.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: dbrownell@users.sourceforge.net Cc: Ingo Molnar <mingo@elte.hu> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Jason Wessel authored
Add missing information about requirements of using the EHCI usb debug controller as well as to mention you can use a debug controller other than the first one in the system. Signed-off-by:
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Jason Wessel authored
On some EHCI debug controllers after the host controller driver is activated, the debug controller will occasionally fail to submit a bulk write URB. On controllers that exhibit this behavior a dummy bulk write must get submitted to resynchronize the device. The "dummy bulk write" does not get received by the host attached to the other end of the usb debug device. The usb debug device simply acknowledges the "dummy bulk write" and returns to a usable state. The behavior, without this patch is that you see missing text from a complete kernel boot when using the keep option to the earlyprintk kernel argument. Signed-off-by:
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Jason Wessel authored
On some EHCI usb debug controllers, the EHCI debug device will fail to be seen after a port reset, after a warm reset. Two options exist to get the device to initialize correctly. Option 1 is to unplug and plug in the device. Option 2 is to use the EHCI port test to get the usb debug device to start talking again. At that point the debug controller port reset will succeed. Signed-off-by:
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Jason Wessel authored
If the EHCI debug port is initialized and in use, the EHCI host controller driver must follow two rules. 1) If the EHCI host driver issues a controller reset, the debug controller driver re-initialization must get called after the reset is completed. 2) The EHCI host driver should ignore any requests to the physical EHCI debug port when the EHCI debug port is in use. The code to check for the debug port was moved from ehci_pci_reinit() to ehci_pci_setup because it must get called prior to ehci_reset() which will clear the debug port registers. Signed-off-by:
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Jason Wessel authored
This patch implements several changes: 1) Improve the capability to debug the dbgp driver The dbgp_ehci_status() was added in a number of places to report the critical ehci registers to diagnose the cause of a failure of the ehci-dbgp driver. 2) Capability to survive the host controller initialization The dbgp_external_startup(), dbgp_not_safe, and dbgp_phys_port were added so as to allow the ehci-dbgp to re-initialize after the ehci host controller is reset by the standard host controller driver. This same routine is common for the early startup or re-initialization. This resulted in the need to move some of the initialization code out of the __init section because the ehci driver has the possibility to be loaded later on as a kernel module. 3) Stability improvements for device initialization The device enumeration from 0 to 127 has the possibility to fail the first time after a warm reset on some older EHCI debug controllers. The enumeration will be tried up to 3 times to account for this failure case. The dbg_wait_until_complete() was changed to wait up to 250 ms before failing which only comes into play during device initialization. The maximum delay will never get hit during the course of normal operation of the driver, unless the device got unplugged or there was a ehci controller failure, in which case the dbgp device driver will shut itself down. Signed-off-by:
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Jason Wessel authored
It is desirable to be able to use one early boot device to debug another or to have multiple places you can see the early boot diagnostics, such as the vga screen or serial device. This patch changes the early_printk console device registration to allow more than one early printk device to get registered via register_console(). Signed-off-by:
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Jason Wessel authored
When using the EHCI host controller as a polled device, a bit more tolerance is required in terms of delays. On some 3+ghz systems the cpu loops were faster than the EHCI device mmio and resulted in the controller failing to initialize. On at least one first generation EHCI controller when it was not operating in interrupt mode, it would fail to report a port change status, but executing the port reset allowed the debug controller to work correctly anyway. This errata causes a one time 300ms delay in the boot time, where as the typical delay is 1-5ms for an EHCI controller that does not have this errata. The debug printk's were fixed to have the correct state messages, and there was a conversion from using early_printk to printk to avoid calling the dbgp driver while debugging the initialization. Signed-off-by:
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Jason Wessel authored
The PCI quirk code executes a BIOS hand off to obtain full control of the EHCI host controller, the self contained ehci-dbgp driver must do the same thing using the early PCI API, else the BIOS can cause a fatal fault. Signed-off-by:
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Jason Wessel authored
The rs232 drivers send a carriage return prior to a new line in the early printk code. The usb debug driver should do the same because you want to be able to use the same terminal programs and tools for analysis of early printk data. Signed-off-by:
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Jason Wessel authored
Move the dbgp early printk driver in advance of refactoring and adding new code, so the changes to this code are tracked separately from the move of the code. The drivers/usb/early directory will be the location of the current and future early usb code for driving usb devices prior initializing the standard interrupt driven USB drivers. Signed-off-by:
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Pete Zaitcev authored
We set pdt_1f_for_no_lun for UFI devices, so most floppy entiries should be unnecessary. This patch removes three entries which I'm certain are. - For Mitsumi I have a customer with RHEL 5 (bz#514296) - For SMSC I accessed Novell's Bugzilla and verified the entry - For Y-E I tested the patch with the actual device Signed-off-by:
Pete Zaitcev <zaitcev@redhat.com> Signed-off-by:
Phil Dibowitz <phil@ipom.com> Signed-off-by:
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Rogério Brito authored
Hi there. On Aug 21 2009, Alan Stern wrote: > On Thu, 20 Aug 2009, Rogério Brito wrote: > > Again, just reiterating, what I said before, even though I am not sure > > if I can reproduce it, I will try to. > > A usbmon trace showing what happens when you plug in the drive and > when you run smartctl would help. The documentation for usbmon in the kernel 2.6.31-rc7 kernel doesn't match what the kernel exposes in the debug fs tree. This patch fixes it. Signed-off-by:
Rogério Brito <rbrito@ime.usp.br> Signed-off-by:
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Anand Gadiyar authored
OMAP: ISP1301: Compile fix Fix this build error on non- OMAP-H2/H3/H4 systems: (factored out two empty functions as part of the fix) CC drivers/usb/otg/isp1301_omap.o drivers/usb/otg/isp1301_omap.c: In function 'otg_update_isp': drivers/usb/otg/isp1301_omap.c:635: error: implicit declaration of function 'notresponding' drivers/usb/otg/isp1301_omap.c: In function 'b_peripheral': drivers/usb/otg/isp1301_omap.c:973: error: implicit declaration of function 'enable_vbus_draw' drivers/usb/otg/isp1301_omap.c: In function 'isp_update_otg': drivers/usb/otg/isp1301_omap.c:1003: error: implicit declaration of function 'enable_vbus_source' make[2]: *** [drivers/usb/otg/isp1301_omap.o] Error 1 make[1]: *** [drivers/usb/otg] Error 2 make: *** [drivers] Error 2 Signed-off-by:
Anand Gadiyar <gadiyar@ti.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Roel Kluin authored
If request_irq() fails, udp_irq is freed twice. Signed-off-by:
Roel Kluin <roel.kluin@gmail.com> Signed-off-by:
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George Spelvin authored
The previous code had a bug that would add a trailing null byte to the returned descriptor. Signed-off-by:
George Spelvin <linux@horizon.com> Acked-by:
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Roel Kluin authored
If the driver cannot be registered, put_tty_driver(gs_tty_driver) occurred here as well as at label fail. put_tty_driver() already occurs at label fail Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Jiri Slaby authored
usb_buffer_map_sg should return negative on error according to its documentation. But dma_map_sg returns 0 on error. Take this into account and return -ENOMEM in such situation. While at it, return -EINVAL instead of -1 when wrong input is passed in. If this wasn't done, usb_sg_* operations used after usb_sg_init which returned 0 may cause oopses/deadlocks since we don't init structures/entries, esp. completion and status entry. Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Signed-off-by:
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Alan Stern authored
This patch (as1281) changes the way ehci-hcd deschedules interrupt QHs, copying the approach used for async QHs. The caller is no longer responsible for rescheduling the QH if its queue is non-empty; instead the reschedule is done directly by intr_deschedule(), after calling qh_completions(). This is exactly the same as how end_unlink_async() works. ehci_urb_dequeue() and intr_deschedule() now correctly handle the case where they are called while another interrupt URB for the same QH is being given back. This was a surprisingly large blind spot. And scan_periodic() now respects the new needs_rescan flag. Signed-off-by:
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Alan Stern authored
This patch (as1280) fixes an obscure bug in ehci-hcd's dequeuing logic for async URBs. If a later URB is unlinked and the completion routine unlinks an earlier URB, then the earlier URB won't be given back in a timely manner because the endpoint queue isn't rescanned as it should be. Similar bugs occur if an endpoint is reset or a halt is cleared while a completion routine is running, because the subroutines don't test for the COMPLETING state. All these problems are solved by adding a new needs_rescan flag to the ehci_qh structure. If the flag is set while scanning through an idle QH, the scan will be repeated. If the QH isn't idle then an unlink cycle will be initiated, and the proper action will be taken when it becomes idle. Also, an unnecessary test is removed from qh_link_async(): That routine is never called if the QH's state isn't IDLE. Signed-off-by:
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Anton Vorontsov authored
Current bindings specify that "fsl,mpc8323-qe-usb" compatible entry should be used as a base match for QE UDCs, so update the driver to comply with the bindings. Signed-off-by:
Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Frank Schaefer authored
This is how "real" UARTs (e.g. 16550) work and AFAIK what RS232 specifies, too. Make the driver more compliant. Signed-off-by:
Frank Schaefer <schaefer.frank@gmx.net> Signed-off-by:
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Frank Schaefer authored
The device supports it, so why not use it ? Works fine ! Signed-off-by:
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Frank Schaefer authored
According to the datasheets, the PL2303 supports a set of 25 baudrates. The baudrate is set as a 4 byte value directly. During my experiments with device 067b:2303 (PL2303X), I noticed that - the bridge-controller always uses 9600 baud if invalid/unsupported baud rate values are set - the baud rate value returned by usb_control_msg(..., GET_LINE_REQUEST, ...) does not reflect the actually used baudrate. Always the last set value is returned, even if it was invalid and not used by the controller. This patch fixes the following issues with the current code: 1.) make sure that only supported baudrates are set (are there any buggy chip revisions out there which don't "like" other values... ?). 2.) always set the baudrate to the next nearest supported baudrate. 3.) applications can now read back the resulting baudrate properly, because tty_encode_baud_rate(...) is now fed with the actually used baudrate. Signed-off-by: -
Olivier Bornet authored
Using the module parameter vcc_default, you can choose the default VCC value. Signed-off-by:
Olivier Bornet <Olivier.Bornet@puck.ch> Signed-off-by:
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Olivier Bornet authored
Signed-off-by:
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Olivier Bornet authored
You can now set the IUU reader to 3.3V VCC instead of 5V VCC, using the sysfs parameter vcc_mode. Valid values are 3 and 5. Signed-off-by:
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Olivier Bornet authored
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Olivier Bornet authored
Resetting the device cause the device to have a new name in the /dev. Signed-off-by:
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Steve Holland authored
Follow T&M convention of obeying EOM flag. Avoid exception cases where instrument response size matches a buffer size. Signed-off-by:
Steve Holland <sdh4@iastate.edu> Signed-off-by:
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Steve Holland authored
Limit data copied to userspace to amount requested. Prevents a faulty instrument from overwriting user memory. Signed-off-by:
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Steve Holland authored
The header size should not be included in the number of bytes requested of the instrument Signed-off-by:
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Tim Small authored
Here is a patch to the ch341 driver which adds serial break support. Signed-off-by:
Tim Small <tim@seoss.co.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Alan Stern authored
This patch (as1275) fixes the s3c2410 device controller driver. Its usb_gadget_unregister_driver() routine is supposed to call the gadget driver's unbind method, not the disconnect method. Signed-off-by:
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Brian Niebuhr authored
This patch adds a CDC EEM ethernet gadget driver. CDC EEM is a newer USB ethernet specification that uses a simpler interface than the older CDC ECM. This makes CDC EEM usable by a wider set of USB hardware. By default the ethernet gadget will still use CDC ECM/Subset, but kernel configuration and/or a module parameter will allow alternative use of the CDC EEM protocol. Changes since last version: - Brought in missing RNDIS changes that caused compile error - Modified 'sentinel CRC' checking to match EEM host driver Signed-off-by:
Brian Niebuhr <bniebuhr@efjohnson.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Oliver Neukum authored
These printks can be removed as they only provide information about the driver not the device and nobody has ever provided feedback. Signed-off-by: -
David VomLehn authored
When do_output_char() attempts to write a carriage return/line feed sequence, it first checks to see how much buffer room is available. If there are at least two characters free, it will write the carriage return/line feed with two calls to tty_put_char(). It calls the tty_operation functions write() for devices that don't support the tty_operations function put_char(). If the USB generic serial device's write URB is not in use, it will return the buffer size when asked how much room is available. The write() of the carriage return will cause it to mark the write URB busy, so the subsequent write() of the line feed will be ignored. This patch uses the kfifo infrastructure to implement a write FIFO that accurately returns the amount of space available in the buffer. Signed-off-by:
David VomLehn <dvomlehn@cisco.com> Signed-off-by:
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H Hartley Sweeten authored
Remove unused variable in ohci-ep93xx.c. This only shows up when CONFIG_PM is enabled. Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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