On 01/26/2016 08:58 PM, Lu Baolu wrote: > Hi, > > This patch series adds support for early printk through USB3 debug port. > USB3 debug port is described in xHCI specification as an optional extended > capability. > > Patch 1 to 9 add the driver for xHCI debug capability. It interfaces with > the register set and provides the required ops (read/write/control) to upper > layers. Early printk is one consumer of these ops. The hooks for early printk > are introduced in patch 8. This design is similar to what we have done in > drivers/usb/early/ehci-dbgp.c. > > Patch 10 is the design document and user guide. > > Change log: > v1->v2: > (1) Patch 1 re-implemented. "debugfs" has been replaced with sysfs. > The scope reduced from all extended capabilities to debug port > specific. > (2) Patch 11 changed. Removed unnecessary .bulk_out_size setting. > > v2->v3: > (1) Patch 11 got acked by Johan Hovold. > > v3->v4: > (1) Patch 1 code refactored by using xhci_find_ext_cap_by_id() helper. > (2) Patch 3 "bus hung state" changed to "port hung state" in commit message. > (3) Patch 12 added verified platform information. > > v4->v5: > (1) Patch 1 & 3 code refactored by using xhci_find_next_ext_cap() helper. > (2) Patch 12 updated with more user guide information. > (3) All patches rebased to the new usb-next branch which contains commit > d5ddcdf(xhci: rework xhci extended capability list parsing functions). > > v5->v6: > (1) refresh the patches against 4.5-rc1. > (2) change "usb: xhci: dbc" to "usb: dbc" in the patch titles as they > are not part of xhci driver. > > v6->v7: > (1) two patches removed from the patch series. One belongs to xHCI host > controller driver, and another belongs to usb/serial. > (2) add fix for 0-DAY kernel test warning: > drivers/usb/early/xhci-dbc.c:917:6-10: WARNING: > Unsigned expression compared with zero: size > 0 > (3) add fix for 0-DAY kernel test error: > arch/x86/built-in.o: In function `setup_early_printk': > early_printk.c:(.init.text+0xceba): undefined reference to `early_xdbc_init' > early_printk.c:(.init.text+0xcec8): undefined reference to `early_xdbc_console' > > Lu Baolu (10): > x86: fixmap: add permanent fixmap for xhci debug port > usb: dbc: probe and setup xhci debug capability > usb: dbc: add support for Intel xHCI dbc quirk > usb: dbc: add debug buffer > usb: dbc: add bulk out and bulk in interfaces > usb: dbc: handle dbc-configured exit > usb: dbc: handle endpoint stall > x86: early_printk: add USB3 debug port earlyprintk support > usb: dbc: add handshake between debug target and host > usb: doc: add document for xHCI DbC driver Hi Greg, I removed two patches from this series which belong to usb/xhci and usb/serial. The remaining patches are all for usb3 debug port driver. Will you queue this for usb-next? Or, do you want me to do anything else? Thanks, Baolu > > Documentation/kernel-parameters.txt | 1 + > Documentation/usb/xhci-dbc.txt | 350 +++++++++ > MAINTAINERS | 8 + > arch/x86/Kconfig.debug | 14 + > arch/x86/include/asm/fixmap.h | 4 + > arch/x86/kernel/early_printk.c | 5 + > drivers/usb/Kconfig | 3 + > drivers/usb/Makefile | 2 +- > drivers/usb/early/Makefile | 1 + > drivers/usb/early/xhci-dbc.c | 1394 +++++++++++++++++++++++++++++++++++ > include/linux/usb/xhci-dbc.h | 224 ++++++ > 11 files changed, 2005 insertions(+), 1 deletion(-) > create mode 100644 Documentation/usb/xhci-dbc.txt > create mode 100644 drivers/usb/early/xhci-dbc.c > create mode 100644 include/linux/usb/xhci-dbc.h > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
