kernel/linux.git/drivers/usb/early, branch v4.19.39

usb: early: Correct the endpoint type value for bulk in endpoint

2017-12-07T15:03:15+00:00

This corrects the endpiont type value set to the DbC bulk in endpoint. The previous value doesn't cause any problems because that we now only use the bulk out endpoint. Set the hardware with the correct value any way. Signed-off-by: Lu Baolu Signed-off-by: Greg Kroah-Hartman

USB: add SPDX identifiers to all remaining Makefiles

2017-11-07T14:53:48+00:00

It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. This updates the remaining drivers/usb/*Makefile* that were missing SPDX identifiers. They all get the following identifier: SPDX-License-Identifier: GPL-2.0 The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. Cc: Thomas Gleixner Cc: Kate Stewart Cc: Philippe Ombredanne Cc: Peter Korsgaard Cc: Thomas Winischhofer Cc: Johan Hovold Acked-by: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman

USB: early: Remove redundant license text

2017-11-07T14:45:02+00:00

Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Acked-by: Lu Baolu Signed-off-by: Greg Kroah-Hartman

USB: early: Use new USB product ID and strings for DbC device

2017-11-07T14:34:08+00:00

The DbC register set defines an interface for system software to specify the vendor id and product id for the debug device. These two values will be presented by the debug device in its device descriptor idVendor and idProduct fields. The current used product ID is a place holder. We now have a valid one. The description strings are changed accordingly. This patch should be back-ported to kernels as old as v4.12, that contain the commit aeb9dd1de98c ("usb/early: Add driver for xhci debug capability"). Cc: # v4.12+ Signed-off-by: Lu Baolu Signed-off-by: Greg Kroah-Hartman

USB: add SPDX identifiers to all remaining files in drivers/usb/

2017-11-04T10:48:02+00:00

It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner Cc: Kate Stewart Cc: Philippe Ombredanne Signed-off-by: Greg Kroah-Hartman Acked-by: Felipe Balbi Acked-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman

usb/early: Remove trace_printk() callers in xhci-dbc

2017-06-13T08:54:40+00:00

Trace_printk() was used to log debug messages in xhci-dbc.c where printk() isn't feasible. As there should not be a single caller to trace_printk() in normal kernels, replace them with empty functions. Cc: Vlastimil Babka Cc: Steven Rostedt Cc: Peter Zijlstra Signed-off-by: Lu Baolu Signed-off-by: Greg Kroah-Hartman

usb/early: Add driver for xhci debug capability

2017-03-21T11:30:05+00:00

XHCI debug capability (DbC) is an optional but standalone functionality provided by an xHCI host controller. Software learns this capability by walking through the extended capability list of the host. XHCI specification describes DbC in section 7.6. This patch introduces the code to probe and initialize the debug capability hardware during early boot. With hardware initialized, the debug target (system on which this code is running) will present a debug device through the debug port (normally the first USB3 port). The debug device is fully compliant with the USB framework and provides the equivalent of a very high performance (USB3) full-duplex serial link between the debug host and target. The DbC functionality is independent of the xHCI host. There isn't any precondition from the xHCI host side for the DbC to work. One use for this feature is kernel debugging, for example when your machine crashes very early before the regular console code is initialized. Other uses include simpler, lockless logging instead of a full-blown printk console driver and klogd. Signed-off-by: Lu Baolu Acked-by: Thomas Gleixner Cc: Greg Kroah-Hartman Cc: Linus Torvalds Cc: Mathias Nyman Cc: Peter Zijlstra Cc: linux-usb@vger.kernel.org Link: http://lkml.kernel.org/r/1490083293-3792-3-git-send-email-baolu.lu@linux.intel.com [ Small fix to the Kconfig help text. ] Signed-off-by: Ingo Molnar

drivers: usb: early: remove unused code

2017-02-08T06:43:47+00:00

Remove this line of code because devnum is overwritten before it can be used. This could happen if line of code 609 (goto try_again;) is executed. Otherwise, devnum is never used again. Addresses-Coverity-ID: 1226870 Signed-off-by: Gustavo A. R. Silva Signed-off-by: Greg Kroah-Hartman

treewide: remove redundant #include

2016-10-11T22:06:33+00:00

Kernel source files need not include explicitly because the top Makefile forces to include it with: -include $(srctree)/include/linux/kconfig.h This commit removes explicit includes except the following: * arch/s390/include/asm/facilities_src.h * tools/testing/radix-tree/linux/kernel.h These two are used for host programs. Link: http://lkml.kernel.org/r/1473656164-11929-1-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

usb: early/ehci-dbgp: make it explicitly non-modular

2016-06-26T18:48:18+00:00

The Kconfig currently controlling compilation of this code is: arch/x86/Kconfig.debug:config EARLY_PRINTK_DBGP arch/x86/Kconfig.debug: bool "Early printk via EHCI debug port" ...meaning that it currently is not being built as a module by anyone. Lets remove the couple traces of modularity so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. Cc: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org Signed-off-by: Paul Gortmaker Signed-off-by: Greg Kroah-Hartman