- 20 May, 2010 40 commits
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James Maki authored
All unsuccessful (non-zero status) URBs were being dropped. After N_IN_URBs are dropped you will no longer be able to receive data. This patch resubmits unsuccessful URBs unless the status indicates that it should be terminated. The statuses that indicate the URB should be terminated was gathered from other similar drivers. Signed-off-by:
James Maki <jamescmaki@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Fabien Chouteau authored
g_hid is a USB gadget driver implementing the Human Interface Device class specification. The driver handles basic HID protocol handling in the kernel, and allows userspace to read/write HID reports trough /dev/hidgX character devices. Signed-off-by:
Fabien Chouteau <fabien.chouteau@barco.com> Signed-off-by:
Peter Korsgaard <peter.korsgaard@barco.com> Signed-off-by:
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Johan Hovold authored
Remove unnecessary comments stating function names at (some) opening/closing braces. Fix some whitespace issues. Signed-off-by:
Johan Hovold <jhovold@gmail.com> Signed-off-by:
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Johan Hovold authored
Generalise write buffer preparation. This allows for drivers to manipulate (e.g. add headers) to bulk out data before it is sent. This adds a new function pointer to usb_serial_driver: int (*prepare_write_buffer)(struct usb_serial_port *port, void **dest, size_t size, const void *src, size_t count); The function is generic and can be used with either kfifo-based or multi-urb writes: If *dest is NULL the implementation should allocate dest. If src is NULL the implementation should use the port write fifo. If not set, a generic implementation is used which simply uses memcpy or kfifo_out. Signed-off-by:
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Johan Hovold authored
Use dynamic transfer buffer sizes since it is more efficient to let the host controller do the partitioning to fit endpoint size. This way we also do not use more than one urb per write request. Replace max_in_flight_urbs with multi_urb_write flag in struct usb_serial_driver to enable multi-urb writes. Use MAX_TX_URBS=40 and a max buffer size of PAGE_SIZE to prevent DoS attacks. Signed-off-by:
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Johan Hovold authored
Allow drivers to implement their own multi-urb write bulk callbacks as we do for single urb writes. Signed-off-by:
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Johan Hovold authored
Use the generic kfifo-based write implementation rather than allowing up to 4000 8 byte urbs in the host stack queues. Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by:
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Johan Hovold authored
Use usb_serial_generic_close to kill the read and write urbs and to reset the write fifo. Signed-off-by:
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Johan Hovold authored
Replace custom fifo-based write implementation with the generic kfifo-based one. Signed-off-by:
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Johan Hovold authored
Submit write urb if it is not already in use and we have buffered data. Signed-off-by:
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Johan Hovold authored
Clean up error messages on usb_submit_urb failure. Remove debug message on zero-length writes. Signed-off-by:
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Johan Hovold authored
Switch to generic read implementation and use process_read_urb to do device specific processing (handle line status). Signed-off-by:
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Johan Hovold authored
Allow drivers to use the generic throttle and unthrottle implementation. This makes sense for drivers using the generic read functionality. Note that drivers need to set these explicitly in order to enable them (i.e., we do not set them at port probe if not defined). Signed-off-by:
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Johan Hovold authored
Use generic read implementation and use process_read_urb to do device specific processing (handle line status). Signed-off-by:
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Johan Hovold authored
Add process_read_urb to usb_serial_driver so that a driver can rely on the generic read (and throttle) mechanism but still do device specific processing of incoming data (such as adding tty_flags before pushing to line discipline). The default generic implementation handles sysrq for consoles but otherwise simply pushes to tty. Signed-off-by:
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Johan Hovold authored
Always process and flush read urb, but only resubmit when not throttled. The new tty-layer supply plenty of slack so there is really no need to cache and delay processing of a single urb while throttled. Note that unthrottle now submits using GFP_KERNEL as we are not in atomic context (so there is no need to save irq state either). Note also that the process_read_urb function could be added to usb_serial_driver should any driver need to do any device specific processing. Signed-off-by:
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Johan Hovold authored
There is no need to initialise the read urb as this is done at port probe. Signed-off-by:
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Johan Hovold authored
The generic read and write bulk urbs are initialised when allocated in usb_serial_probe. The only field that needs to be updated after that is the transfer_buffer_length of the write urb. Signed-off-by:
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Johan Hovold authored
Use the already exported function for submitting the read urb associated with a usb_serial_port. Make sure it returns the result of usb_submit_urb and rename to the more descriptive usb_serial_generic_submit_read_urb. Signed-off-by:
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Johan Hovold authored
Export usb_serial_generic_close so that drivers can easily kill the read and write urb and make sure that the write fifo is reset. Signed-off-by:
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Johan Hovold authored
Make sure fifo is emptied on close. Signed-off-by:
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Johan Hovold authored
On errors the fifo was reset without any locking. This could race with write which do kfifo_put and perhaps also chars_in_buffer and write_room. Every other access to the fifo is protected using the port lock so better add it to the error path as well. Signed-off-by:
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Johan Hovold authored
Make sure chars_in_buffer accounts also for data in host stack queues. This fixes the problem with tty_wait_until_sent returning too soon at close which could cause the final write urb to be cancelled. Reported-by:
Pete Zaitcev <zaitcev@redhat.com> Signed-off-by:
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Johan Hovold authored
The pl2303 requires a bulk-in buffer larger than endpoint size to keep up at high baudrates without loosing data. Signed-off-by:
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Johan Hovold authored
Increase the bulk-out buffer size from 64 to 256 byte. This gives a significant increase in throughput already at 1Mbaud as well as lowered CPU usage. The buffer is big enough to keep up also at 3Mbaud (128b would not suffice). 64b 256b 921k: 640 KB/s 870 KB/s 3M: 640 KB/s 2520 KB/s Signed-off-by: -
Johan Hovold authored
The cp210x requires a bulk-in buffer larger than endpoint size to keep up at high baudrates without loosing data. Signed-off-by:
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Johan Hovold authored
Increase the bulk-out buffer size from 64 to 256 byte. This gives a significant increase in throughput already at 1Mbaud (e.g. 710 instead of 640 KB/s) as well as lowered CPU usage. Signed-off-by:
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Johan Hovold authored
Allow drivers to define custom bulk in/out buffer sizes in struct usb_serial_driver. If not set, fall back to the default buffer size which matches the endpoint size. Three drivers are currently freeing the pre-allocated buffers and allocating larger ones to achieve this at port probe (ftdi_sio) or even at port open (ipaq and iuu_phoenix), which needless to say is suboptimal. Signed-off-by:
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Hans de Goede authored
Add a new quirk USB_QUIRK_HONOR_BNUMINTERFACES, when this quirk is set and a device has more interface descriptors in a configuration then it claims to have in config->bNumInterfaces, ignore all additional interfaces. This is needed for devices which try to hide unused interfaces by only lowering config->bNumInterfaces, and which can't handle if you try to talk to the "hidden" interfaces. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Randy Dunlap authored
Fix build error when CONFIG_MAGIC_SYSRQ is not enabled: drivers/usb/serial/generic.c:566: error: implicit declaration of function 'handle_sysrq' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Vijay Kumar authored
Add ZIO Motherboard USB serial interface driver. Signed-off-by:
Vijay Kumar B. <vijaykumar@zilogic.com> Signed-off-by:
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Jason Wessel authored
The usb console code has had a long standing problem of not being able to pass the baud rate from the kernel argument console=ttyUSB0,BAUD down to the initial tty open, unless you were willing to settle for 9600 baud. The solution is to directly use tty_init_termios() in usb_console_setup() as this will preserve any changes to the initial termios setting on future opens. CC: Alan Cox <alan@linux.intel.com> CC: Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
Jason Wessel <jason.wessel@windriver.com> Signed-off-by:
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Michal Nazarewicz authored
"Static" buffers in fsg_buffhd structure (ie. fields which are arrays rather then pointers to dynamically allocated memory) are not aligned to any "big" power of two which may lead to poor DMA performance (copying "by hand" of head or tail) or no DMA at all even if otherwise hardware supports it. Therefore, this patch makes mass storage function use kmalloc()ed buffers which are (because of their size) page aligned (which should be enough for any hardware). Signed-off-by:
Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by:
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Felipe Balbi authored
... and simplify the was we read/write from/to DMA COUNT register. Signed-off-by:
Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by:
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Felipe Balbi authored
we can support the musb-specific test modes on the vendor specific range of test selector as stated on USB Specification Table 9-7 Test Mode Selectors. Signed-off-by:
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Felipe Balbi authored
for now only a simple register dump entry (which can be rather useful on debugging) and a way to start test modes. Signed-off-by:
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Cliff Cai authored
Rather than hardcoding the gpio levels for vrsel, allow the platform resources to handle this so boards can be active high or low. Signed-off-by:
Cliff Cai <cliff.cai@analog.com> Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Signed-off-by:
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Maulik Mankad authored
This patch adds CONFIG_ARCH_OMAP4 macro within MUSB driver. Signed-off-by:
Maulik Mankad <x0082077@ti.com> Cc: David Brownell <david-b@pacbell.net> Cc: Sergei Shtylyov <sshtylyov@mvista.com> Cc: Olof Johansson <olof@lixom.net> Signed-off-by:
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Maulik Mankad authored
This patch updates the Makefile to build the MUSB driver for OMAP4. It also sets the Kconfig options for OMAP4. Signed-off-by:
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Maulik Mankad authored
Program the OTG_INTERFSEL register based on transcevier type passed from board file. Adapt signature of musb_platform_init() function for davinci, blackfin and tusb6010. Signed-off-by:
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