linux/drivers/usb
Johan Hovold 5edb65a337 USB: serial: cp210x: improve line-speed handling for CP2104 and CP2105
CP2104 and the ECI interface of CP2105 support further baud rates than
the ones specified in AN205 table 1, and we can use the same equations
as for CP2102N to determine and report back the actual baud rates used.

Note that this could eventually be generalised also to CP2108, which
uses a different base clock. There appears to be an error in the CP2108
equations which needs to be confirmed on actual hardware first however
(specifically, the subtraction of one from the divisor appears to be
incorrect as it introduces larger errors).

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
2018-07-18 21:54:56 +02:00
..
atm
c67x00
chipidea USB: chipidea: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
class
common
core treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
dwc2 treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
dwc3 USB: dwc3: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
early
gadget vfs/y2038: inode timestamps conversion to timespec64 2018-06-15 07:31:07 +09:00
host treewide: kzalloc_node() -> kcalloc_node() 2018-06-12 16:19:22 -07:00
image
isp1760
misc treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
mon treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
mtu3 USB: mtu3: no need to check return value of debugfs_create_dir() 2018-05-31 12:54:21 +02:00
musb USB: musb: clean up debugfs file and directory creation 2018-05-31 12:54:21 +02:00
phy phy: tegra: select USB_COMMON 2018-05-31 12:50:40 +02:00
renesas_usbhs treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
roles usb: roles: intel_xhci: Enable runtime PM 2018-05-24 18:17:00 +02:00
serial USB: serial: cp210x: improve line-speed handling for CP2104 and CP2105 2018-07-18 21:54:56 +02:00
storage treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
typec USB: typec: fsusb302: no need to check return value of debugfs_create_dir() 2018-05-31 16:03:59 +02:00
usbip usbip: vhci_sysfs: fix potential Spectre v1 2018-05-24 18:14:28 +02:00
wusbcore treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
Kconfig
Makefile
README
usb-skeleton.c

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("hub_wq").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.