[PATCH v6 03/12] usb: dbc: probe and setup xhci debug capability

between the debug host and target. Signed-off-by: Lu Baolu --- MAINTAINERS | 7 + arch/x86/Kconfig.debug | 12 + drivers/usb/early/Makefile | 1 + drivers/usb/early/xhci-dbc.c | 774 +++ include/linux/usb/xhci-dbc.h | 187

[PATCH v6 00/12] usb: early: add support for early printk through USB3 debug port

de 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 t

[PATCH v6 09/12] x86: early_printk: add USB3 debug port earlyprintk support

Add support for early printk by writing debug messages to the USB3 debug port. Users can use this type of early printk by specifying kernel parameter of "earlyprintk=xdbc". This gives users a chance of providing debug output. Signed-off-by: Lu Baolu --- Documentation/kernel-parameter

[PATCH v6 07/12] usb: dbc: handle dbc-configured exit

DbC might exit configured state in some cases (refer to 7.6.4.4 in xHCI spec 1.1). Software needs detect and clear this situation by clearing DCCTRL.DCR and wait until the DbC configured before read or write oprations. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 28

[PATCH v6 08/12] usb: dbc: handle endpoint stall

. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 36 1 file changed, 36 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index c81df40..344d93e 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early

[PATCH v6 11/12] usb: serial: usb_debug: add support for dbc debug device

This patch add dbc debug device support in usb_debug driver. Signed-off-by: Lu Baolu Acked-by: Johan Hovold --- drivers/usb/serial/usb_debug.c | 28 +--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial

[PATCH v6 12/12] usb: doc: add document for xHCI DbC driver

Add Documentation/usb/xhci-dbc.txt. This document includes development status and user guide for USB3 debug port. Signed-off-by: Lu Baolu --- Documentation/usb/xhci-dbc.txt | 350 + MAINTAINERS| 1 + drivers/usb/early/xhci-dbc.c

[PATCH v6 10/12] usb: dbc: add handshake between debug target and host

'y' in the tty application. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 27 +++ 1 file changed, 27 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 6c24ba0..37c5c87 100644 --- a/drivers/usb/early/xhci-dbc

[PATCH v6 05/12] usb: dbc: add debug buffer

DBC_DEBUG is defined. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 62 ++-- 1 file changed, 60 insertions(+), 2 deletions(-) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 41ce116..6855048 100644 --- a/drivers

[PATCH v6 04/12] usb: dbc: add support for Intel xHCI dbc quirk

a port reset to the debug port from the host xHCI. This patch introduces this work around. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 52 include/linux/usb/xhci-dbc.h | 2 ++ 2 files changed, 54 insertions(+) diff --git a/drivers/usb

[PATCH v6 06/12] usb: dbc: add bulk out and bulk in interfaces

This patch adds interfaces for bulk out and bulk in ops. These interfaces could be used to implement early printk bootconsole or hook to various system debuggers. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 373 +++ include/linux/usb/xhci

[PATCH v6 01/12] usb: xhci: add sysfs file for xHCI debug port

file will show users the state (disabled, enabled or configured) of the debug port. With a host that does NOT support debug port, "debug_port_state" file won't be created. Signed-off-by: Lu Baolu --- .../ABI/testing/sysfs-bus-pci-drivers-xhci_hcd | 23

[PATCH 1/1] usb: cdc-acm: send zero packet for intel 7260 modem

For Intel 7260 modem, it is needed for host side to send zero packet if the BULK OUT size is equal to USB endpoint max packet length. Otherwise, modem side may still wait for more data and cannot give response to host side. Signed-off-by: Konrad Leszczynski Signed-off-by: Lu Baolu Cc: sta

Re: [PATCH v2 1/1] usb: cdc-acm: handle unlinked urb in acm read callback

On 12/30/2015 09:46 AM, Greg Kroah-Hartman wrote: > On Wed, Dec 30, 2015 at 08:42:01AM +0800, Lu Baolu wrote: >> In current acm driver, the bulk-in callback function ignores the >> URBs unlinked in usb core. >> >> This causes unexpected data loss in some cases. For

[PATCH v3 1/1] usb: cdc-acm: handle unlinked urb in acm read callback

oss occurs. This patch lets bulk-in callback function handle unlinked urbs to avoid data loss. Signed-off-by: Tang Jian Qiang Signed-off-by: Lu Baolu Cc: sta...@vger.kernel.org Acked-by: Oliver Neukum --- drivers/usb/class/cdc-acm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) cha

[PATCH v2 1/1] usb: cdc-acm: handle unlinked urb in acm read callback

oss occurs. This patch lets bulk-in callback function handle unlinked urbs to avoid data loss. Signed-off-by: Tang Jian Qiang Signed-off-by: Lu Baolu Cc: sta...@vger.kernel.org Acked-by: Oliver Neukum --- drivers/usb/class/cdc-acm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) d

[PATCH 1/1] usb: cdc-acm: handle unlinked urb in acm read callback

oss occurs. This patch lets bulk-in callback function handle unlinked urbs to avoid data loss. Signed-off-by: Tang Jian Qiang Signed-off-by: Lu Baolu Cc: sta...@vger.kernel.org --- drivers/usb/class/cdc-acm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/cl

Re: (4.3.0) r8152: deadlock related to runtime suspend?

On 12/07/2015 05:37 PM, Peter Wu wrote: > On Mon, Dec 07, 2015 at 05:11:50PM +0800, Lu Baolu wrote: >> Hi Peter, >> >> Have you ever tried disabling auto-pm? Did things go smoothly if auto-pm is >> disabled? >> >> I always disable usb auto-pm in below

Re: [PATCH] usb: host: iounmap before return

On 12/06/2015 09:47 PM, Geyslan G. Bem wrote: > This patch fixes a 'quirk_usb_handoff_xhci()' branch return that was not > unmapping correctly. > > Coccinelle: scripts/coccinelle/free/iounmap.cocci > > Signed-off-by: Geyslan G. Bem > --- > drivers/usb/host/pci-quirks.c | 3 ++- > 1 file change

Re: (4.3.0) r8152: deadlock related to runtime suspend?

Hi Peter, Have you ever tried disabling auto-pm? Did things go smoothly if auto-pm is disabled? I always disable usb auto-pm in below way. # echo on | tee /sys/bus/usb/devices/*/power/control # echo on > /sys/bus/pci/devices//power/control Thanks, Baolu On 12/05/2015 06:59 PM, Peter Wu wrote:

Re: [PATCH 2/2] usb: pci-quirks: register USB mux found on Cherrytrail SOC

> configure it. Normally BIOS takes care of it. > > The driver for the mux is an "extcon" driver. With this we > only register the mux if it's detected. > > Suggested-by: Lu Baolu > Signed-off-by: Heikki Krogerus > --- > drivers/usb/host/pci-quirks.c | 3

[PATCH v5 04/12] usb: xhci: dbc: add support for Intel xHCI dbc quirk

a port reset to the debug port from the host xHCI. This patch introduces this work around. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 52 include/linux/usb/xhci-dbc.h | 2 ++ 2 files changed, 54 insertions(+) diff --git a/drivers/usb

[PATCH v5 03/12] usb: xhci: dbc: probe and setup xhci debug capability

between the debug host and target. Signed-off-by: Lu Baolu --- MAINTAINERS | 7 + arch/x86/Kconfig.debug | 12 + drivers/usb/early/Makefile | 1 + drivers/usb/early/xhci-dbc.c | 774 +++ include/linux/usb/xhci-dbc.h | 187

[PATCH v5 05/12] usb: xhci: dbc: add debug buffer

DBC_DEBUG is defined. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 62 ++-- 1 file changed, 60 insertions(+), 2 deletions(-) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 41ce116..6855048 100644 --- a/drivers

[PATCH v5 10/12] usb: xhci: dbc: add handshake between debug target and host

'y' in the tty application. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 27 +++ 1 file changed, 27 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 6c24ba0..37c5c87 100644 --- a/drivers/usb/early/xhci-dbc

[PATCH v5 09/12] x86: early_printk: add USB3 debug port earlyprintk support

Add support for early printk by writing debug messages to the USB3 debug port. Users can use this type of early printk by specifying kernel parameter of "earlyprintk=xdbc". This gives users a chance of providing debug output. Signed-off-by: Lu Baolu --- Documentation/kernel-parameter

[PATCH v5 07/12] usb: xhci: dbc: handle dbc-configured exit

DbC might exit configured state in some cases (refer to 7.6.4.4 in xHCI spec 1.1). Software needs detect and clear this situation by clearing DCCTRL.DCR and wait until the DbC configured before read or write oprations. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 28

[PATCH v5 06/12] usb: xhci: dbc: add bulk out and bulk in interfaces

This patch adds interfaces for bulk out and bulk in ops. These interfaces could be used to implement early printk bootconsole or hook to various system debuggers. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 373 +++ include/linux/usb/xhci

[PATCH v5 12/12] usb: doc: add document for xHCI DbC driver

Add Documentation/usb/xhci-dbc.txt. This document includes development status and user guide for USB3 debug port. Signed-off-by: Lu Baolu --- Documentation/usb/xhci-dbc.txt | 350 + MAINTAINERS| 1 + drivers/usb/early/xhci-dbc.c

[PATCH v5 08/12] usb: xhci: dbc: handle endpoint stall

. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 36 1 file changed, 36 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index c81df40..344d93e 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early

[PATCH v5 11/12] usb: serial: usb_debug: add support for dbc debug device

This patch add dbc debug device support in usb_debug driver. Signed-off-by: Lu Baolu Acked-by: Johan Hovold --- drivers/usb/serial/usb_debug.c | 28 +--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial

[PATCH v5 01/12] usb: xhci: add sysfs file for xHCI debug port

file will show users the state (disabled, enabled or configured) of the debug port. With a host that does NOT support debug port, "debug_port_state" file won't be created. Signed-off-by: Lu Baolu --- .../ABI/testing/sysfs-bus-pci-drivers-xhci_hcd | 23

[PATCH v5 02/12] x86: fixmap: add permanent fixmap for xhci debug port

fixed_addresses table for xHCI mmio access. Signed-off-by: Lu Baolu --- arch/x86/include/asm/fixmap.h | 4 1 file changed, 4 insertions(+) diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index f80d700..fbf452f 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include

[PATCH v5 00/12] usb: early: add support for early printk through USB3 debug port

de information. (3) All patches rebased to the new usb-next branch which contains commit d5ddcdf(xhci: rework xhci extended capability list parsing functions). Lu Baolu (12): usb: xhci: add sysfs file for xHCI debug port x86: fixmap: add permanent fixmap for xhci debug port usb: xhci: db

Re: [PATCH v4 01/12] usb: xhci: add sysfs file for xHCI debug port

On 11/20/2015 10:33 PM, Mathias Nyman wrote: On 17.11.2015 08:38, Lu Baolu wrote: This patch adds a sysfs file for users to check 1) whether the debug capability is implemented by hardware; 2) if supported, which state does it stay at. With a host that supports debug port, a file named

Re: [PATCH v3 04/12] usb: xhci: dbc: add support for Intel xHCI dbc quirk

Hi, On 11/17/2015 06:28 PM, Dmitry Malkin wrote: On Mon, 16 Nov 2015 10:18:42 +0800, Lu Baolu wrote: This quirk works as well if debug host doesn't have DBC. I didn't try a DBC-capable debug host yet. Hi, I went through it again, with your v3 patch series on top of vanilla v4

[PATCH v4 02/12] x86: fixmap: add permanent fixmap for xhci debug port

fixed_addresses table for xHCI mmio access. Signed-off-by: Lu Baolu --- arch/x86/include/asm/fixmap.h | 4 1 file changed, 4 insertions(+) diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index f80d700..fbf452f 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include

[PATCH v4 03/12] usb: xhci: dbc: probe and setup xhci debug capability

between the debug host and target. Signed-off-by: Lu Baolu --- MAINTAINERS | 7 + arch/x86/Kconfig.debug | 12 + drivers/usb/early/Makefile | 1 + drivers/usb/early/xhci-dbc.c | 787 +++ include/linux/usb/xhci-dbc.h | 187

[PATCH v4 01/12] usb: xhci: add sysfs file for xHCI debug port

file will show users the state (disabled, enabled or configured) of the debug port. With a host that does NOT support debug port, "debug_port_state" file won't be created. Signed-off-by: Lu Baolu --- .../ABI/testing/sysfs-bus-pci-drivers-xhci_hcd | 23 +++

[PATCH v4 00/12] usb: early: add support for early printk through USB3 debug port

_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. Lu Baolu (12): usb: xhci: add sysfs file for xHCI debug port x86: fixmap: add permanent fixmap for xhci debug port usb

[PATCH v4 04/12] usb: xhci: dbc: add support for Intel xHCI dbc quirk

a port reset to the debug port from the host xHCI. This patch introduces this work around. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 52 include/linux/usb/xhci-dbc.h | 2 ++ 2 files changed, 54 insertions(+) diff --git a/drivers/usb

[PATCH v4 06/12] usb: xhci: dbc: add bulk out and bulk in interfaces

This patch adds interfaces for bulk out and bulk in ops. These interfaces could be used to implement early printk bootconsole or hook to various system debuggers. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 373 +++ include/linux/usb/xhci

[PATCH v4 07/12] usb: xhci: dbc: handle dbc-configured exit

DbC might exit configured state in some cases (refer to 7.6.4.4 in xHCI spec 1.1). Software needs detect and clear this situation by clearing DCCTRL.DCR and wait until the DbC configured before read or write oprations. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 28

[PATCH v4 08/12] usb: xhci: dbc: handle endpoint stall

. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 36 1 file changed, 36 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 8a5a51f..aaf655f 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early

[PATCH v4 10/12] usb: xhci: dbc: add handshake between debug target and host

'y' in the tty application. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 27 +++ 1 file changed, 27 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 68a7139..b75c523 100644 --- a/drivers/usb/early/xhci-dbc

[PATCH v4 11/12] usb: serial: usb_debug: add support for dbc debug device

This patch add dbc debug device support in usb_debug driver. Signed-off-by: Lu Baolu Acked-by: Johan Hovold --- drivers/usb/serial/usb_debug.c | 28 +--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial

[PATCH v4 05/12] usb: xhci: dbc: add debug buffer

DBC_DEBUG is defined. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 62 ++-- 1 file changed, 60 insertions(+), 2 deletions(-) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 6b23f09..b36a527 100644 --- a/drivers

[PATCH v4 12/12] usb: doc: add document for xHCI DbC driver

Add Documentation/usb/xhci-dbc.txt. This document includes development status and user guide for USB3 debug port. Signed-off-by: Lu Baolu --- Documentation/usb/xhci-dbc.txt | 325 + MAINTAINERS| 1 + drivers/usb/early/xhci-dbc.c

[PATCH v4 09/12] x86: early_printk: add USB3 debug port earlyprintk support

Add support for early printk by writing debug messages to the USB3 debug port. Users can use this type of early printk by specifying kernel parameter of "earlyprintk=xdbc". This gives users a chance of providing debug output. Signed-off-by: Lu Baolu --- Documentation/kernel-parameter

Re: [PATCH v3 04/12] usb: xhci: dbc: add support for Intel xHCI dbc quirk

Hi, On 11/13/2015 11:34 PM, Dmitry Malkin wrote: On Mon, 9 Nov 2015 15:38:33 +0800, Lu Baolu wrote: On Intel platform, if the debug target is connected with debug host, enabling DCE bit in command register leads to a hung bus state. In the hung state, the host system will not see a port

[PATCH v3 3/3] usb: core: lpm: remove usb3_lpm_enabled in usb_device

Commit 8306095fd2c1 ("USB: Disable USB 3.0 LPM in critical sections.") adds usb3_lpm_enabled member to struct usb_device. There is no reference to this member now. Hence, it could be removed. Signed-off-by: Lu Baolu --- include/linux/usb.h | 2 -- 1 file changed, 2 deletions(-) di

[PATCH v3 1/3] usb: core: lpm: fix usb3_hardware_lpm sysfs node

u1 (for U1) and usb3_hardware_lpm_u2 (for U2), and recording the U1/U2 LPM status in right places. This patch should be back-ported to kernels as old as 4.3, that contains Commit 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM"). Cc: sta...@vger.kernel.org Signed-off-by: Lu

[PATCH v3 0/3] usb: core: lpm: add sysfs node for usb3 lpm permit

-day robot. Thanks, Baolu Lu Baolu (3): usb: core: lpm: fix usb3_hardware_lpm sysfs node usb: core: lpm: add sysfs node for usb3 lpm permit usb: core: lpm: remove usb3_lpm_enabled in usb_device Documentation/ABI/testing/sysfs-bus-usb | 27 +++--- Documentation/usb/power-management.t

[PATCH v3 2/3] usb: core: lpm: add sysfs node for usb3 lpm permit

or u2 permitted, "u1" - only u1 is permitted, "u2" - only u2 is permitted, "u1_u2" - both u1 and u2 are permitted. With this interface, users can use an LPM-unfriendly USB device on a released Linux kernel. Signed-off-by: Lu Baolu Signed-off-by: Zhuang Jin Can ---

Re: [PATCH v2 1/3] usb: core: lpm: fix usb3_hardware_lpm sysfs node

On 11/13/2015 11:28 PM, Alan Stern wrote: On Fri, 13 Nov 2015, Lu, Baolu wrote: On 11/13/2015 12:20 AM, Alan Stern wrote: On Thu, 12 Nov 2015, Lu Baolu wrote: Commit 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM") introduced usb3_hardware_lpm sysfs node. Th

Re: [PATCH v3 00/12] usb: early: add support for early printk through USB3 debug port

On 11/13/2015 10:26 AM, Dave Young wrote: On 11/13/15 at 10:04am, Lu, Baolu wrote: Hi Dave, On 11/12/2015 02:01 PM, Dave Young wrote: Hi, Baolu On 11/12/15 at 10:45am, Lu, Baolu wrote: Hi Dave, Which device are you testing with? This implementation was developed and tested on Intel

Re: [PATCH v2 1/3] usb: core: lpm: fix usb3_hardware_lpm sysfs node

On 11/13/2015 12:20 AM, Alan Stern wrote: On Thu, 12 Nov 2015, Lu Baolu wrote: Commit 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM") introduced usb3_hardware_lpm sysfs node. This doesn't show the correct status of USB3 U1 and U2 LPM status. This patc

Re: [PATCH v3 00/12] usb: early: add support for early printk through USB3 debug port

Hi Dave, On 11/12/2015 02:01 PM, Dave Young wrote: Hi, Baolu On 11/12/15 at 10:45am, Lu, Baolu wrote: >Hi Dave, > >Which device are you testing with? This implementation was developed >and tested on Intel Skylake devices. > >It doesn't surprise me if it doesn't w

Re: [PATCH v2 3/3] usb: core: lpm: remove usb3_lpm_enabled in usb_device

On 11/13/2015 12:20 AM, Alan Stern wrote: On Thu, 12 Nov 2015, Lu Baolu wrote: Commit 8306095fd2c1 ("USB: Disable USB 3.0 LPM in critical sections.") adds usb3_lpm_enabled member to struct usb_device. There is no reference to this member now. Hence, it could be removed. Signed-

Re: [PATCH v3 00/12] usb: early: add support for early printk through USB3 debug port

On 11/11/2015 10:25 AM, Dave Young wrote: Hi, On 11/11/15 at 09:32am, Lu, Baolu wrote: On 11/10/2015 05:39 PM, Dave Young wrote: Hi, On 11/09/15 at 03:38pm, Lu Baolu wrote: This patch series adds support for early printk through USB3 debug port. USB3 debug port is described in xHCI specifica

[PATCH v2 2/3] usb: core: lpm: add sysfs node for usb3 lpm permit

or u2 permitted, "u1" - only u1 is permitted, "u2" - only u2 is permitted, "u1_u2" - both u1 and u2 are permitted. With this interface, users can use an LPM-unfriendly USB device on a released Linux kernel. Signed-off-by: Lu Baolu Signed-off-by: Zhuang Jin Can ---

[PATCH v2 1/3] usb: core: lpm: fix usb3_hardware_lpm sysfs node

u1 (for U1) and usb3_hardware_lpm_u2 (for U2), and recording the U1/U2 LPM status in right places. This patch should be back-ported to kernels as old as 4.3, that contains Commit 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM"). Cc: sta...@vger.kernel.org Signed-off-by: Lu

[PATCH v2 0/3] usb: core: lpm: add sysfs node for usb3 lpm permit

-unfriendly USB devices on any released Linux kernels. This patch series contains a fix and a cleanup as well. Change log: v1->v2: Fix the "make htmldoc" warning reported by 0-day robot. Thanks, Baolu Lu Baolu (3): usb: core: lpm: fix usb3_hardware_lpm sysfs node usb: core: l

[PATCH v2 3/3] usb: core: lpm: remove usb3_lpm_enabled in usb_device

Commit 8306095fd2c1 ("USB: Disable USB 3.0 LPM in critical sections.") adds usb3_lpm_enabled member to struct usb_device. There is no reference to this member now. Hence, it could be removed. Signed-off-by: Lu Baolu --- include/linux/usb.h | 2 -- 1 file changed, 2 deletions(-) di

Re: [PATCH 3/3] usb: core: lpm: remove usb3_lpm_enabled in usb_device

On 11/11/2015 11:10 PM, Alan Stern wrote: On Wed, 11 Nov 2015, Lu Baolu wrote: Commit 8306095fd2c1 ("USB: Disable USB 3.0 LPM in critical sections.") adds usb3_lpm_enabled member to struct usb_device. There is no reference to this member now. Hence, it could be removed. Signed-

[PATCH 2/3] usb: core: lpm: add sysfs node for usb3 lpm permit

or u2 permitted, "u1" - only u1 is permitted, "u2" - only u2 is permitted, "u1_u2" - both u1 and u2 are permitted. With this interface, users can use an LPM-unfriendly USB device on a released Linux kernel. Signed-off-by: Lu Baolu Signed-off-by: Zhuang Jin Can ---

[PATCH 1/3] usb: core: lpm: fix usb3_hardware_lpm sysfs node

u1 (for U1) and usb3_hardware_lpm_u2 (for U2), and recording the U1/U2 LPM status in right places. This patch should be back-ported to kernels as old as 4.3, that contains Commit 655fe4effe0f ("usbcore: add sysfs support to xHCI usb3 hardware LPM"). Cc: sta...@vger.kernel.org Signed-off-by: Lu

[PATCH 0/3] usb: core: lpm: add sysfs node for usb3 lpm permit

-unfriendly USB devices on any released Linux kernels. This patch series contains a fix and a cleanup as well. Thanks, Baolu Lu Baolu (3): usb: core: lpm: fix usb3_hardware_lpm sysfs node usb: core: lpm: add sysfs node for usb3 lpm permit usb: core: lpm: remove usb3_lpm_enabled in

[PATCH 3/3] usb: core: lpm: remove usb3_lpm_enabled in usb_device

Commit 8306095fd2c1 ("USB: Disable USB 3.0 LPM in critical sections.") adds usb3_lpm_enabled member to struct usb_device. There is no reference to this member now. Hence, it could be removed. Signed-off-by: Lu Baolu --- include/linux/usb.h | 1 - 1 file changed, 1 deletion(-) di

Re: [PATCH v3 00/12] usb: early: add support for early printk through USB3 debug port

On 11/11/2015 10:25 AM, Dave Young wrote: [ 1616.823351] usb 2-2: new SuperSpeed USB device number 8 using xhci_hcd [ 1616.834520] usb 2-2: LPM exit latency is zeroed, disabling LPM. [ 1616.834856] usb 2-2: New USB device found, idVendor=1d6b, idProduct=0004 [ 1616.834858] usb 2-2: New USB devi

Re: [PATCH v3 00/12] usb: early: add support for early printk through USB3 debug port

On 11/11/2015 10:25 AM, Dave Young wrote: Hi, On 11/11/15 at 09:32am, Lu, Baolu wrote: On 11/10/2015 05:39 PM, Dave Young wrote: Hi, On 11/09/15 at 03:38pm, Lu Baolu wrote: This patch series adds support for early printk through USB3 debug port. USB3 debug port is described in xHCI

Re: [PATCH v3 01/12] usb: xhci: add sysfs file for xHCI debug port

+ * + * Copyright (C) 2015 Intel Corp. + * + * Author: Lu Baolu + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include + +#include "x

Re: [PATCH v3 00/12] usb: early: add support for early printk through USB3 debug port

On 11/10/2015 05:39 PM, Dave Young wrote: Hi, On 11/09/15 at 03:38pm, Lu Baolu wrote: 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. I did a test with your previous patchset

[PATCH v3 09/12] x86: early_printk: add USB3 debug port earlyprintk support

Add support for early printk by writing debug messages to the USB3 debug port. Users can use this type of early printk by specifying kernel parameter of "earlyprintk=xdbc". This gives users a chance of providing debug output. Signed-off-by: Lu Baolu --- Documentation/kernel-parameter

[PATCH v3 03/12] usb: xhci: dbc: probe and setup xhci debug capability

between the debug host and target. Signed-off-by: Lu Baolu --- MAINTAINERS | 7 + arch/x86/Kconfig.debug | 12 + drivers/usb/early/Makefile | 1 + drivers/usb/early/xhci-dbc.c | 787 +++ include/linux/usb/xhci-dbc.h | 187

[PATCH v3 05/12] usb: xhci: dbc: add debug buffer

DBC_DEBUG is defined. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 62 ++-- 1 file changed, 60 insertions(+), 2 deletions(-) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 6b23f09..b36a527 100644 --- a/drivers

[PATCH v3 01/12] usb: xhci: add sysfs file for xHCI debug port

file will show users the state (disabled, enabled or configured) of the debug port. With a host that does NOT support debug port, "debug_port_state" file won't be created. Signed-off-by: Lu Baolu --- .../ABI/testing/sysfs-bus-pci-drivers-xhci_hcd | 23 +

[PATCH v3 00/12] usb: early: add support for early printk through USB3 debug port

uot; 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. Lu Baolu (12): usb: xhci: add sysfs file for xHCI debug port

[PATCH v3 04/12] usb: xhci: dbc: add support for Intel xHCI dbc quirk

port reset to the debug port from the host xHCI. This patch introduces this work around. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 52 include/linux/usb/xhci-dbc.h | 2 ++ 2 files changed, 54 insertions(+) diff --git a/drivers/usb

[PATCH v3 10/12] usb: xhci: dbc: add handshake between debug target and host

'y' in the tty application. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 27 +++ 1 file changed, 27 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 68a7139..b75c523 100644 --- a/drivers/usb/early/xhci-dbc

[PATCH v3 07/12] usb: xhci: dbc: handle dbc-configured exit

DbC might exit configured state in some cases (refer to 7.6.4.4 in xHCI spec 1.1). Software needs detect and clear this situation by clearing DCCTRL.DCR and wait until the DbC configured before read or write oprations. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 28

[PATCH v3 08/12] usb: xhci: dbc: handle endpoint stall

. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 36 1 file changed, 36 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 8a5a51f..aaf655f 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early

[PATCH v3 12/12] usb: doc: add document for xHCI DbC driver

Add Documentation/usb/xhci-dbc.txt. This document includes development status and user guide for USB3 debug port. Signed-off-by: Lu Baolu --- Documentation/usb/xhci-dbc.txt | 325 + MAINTAINERS| 1 + drivers/usb/early/xhci-dbc.c

[PATCH v3 06/12] usb: xhci: dbc: add bulk out and bulk in interfaces

This patch adds interfaces for bulk out and bulk in ops. These interfaces could be used to implement early printk bootconsole or hook to various system debuggers. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 373 +++ include/linux/usb/xhci

[PATCH v3 02/12] x86: fixmap: add permanent fixmap for xhci debug port

fixed_addresses table for xHCI mmio access. Signed-off-by: Lu Baolu --- arch/x86/include/asm/fixmap.h | 4 1 file changed, 4 insertions(+) diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index f80d700..fbf452f 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include

[PATCH v3 11/12] usb: serial: usb_debug: add support for dbc debug device

This patch add dbc debug device support in usb_debug driver. Signed-off-by: Lu Baolu Acked-by: Johan Hovold --- drivers/usb/serial/usb_debug.c | 28 +--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial

Re: [PATCH 00/12] usb: early: add support for early printk through USB3 debug port

On 11/03/2015 05:42 PM, Dave Young wrote: On 10/28/15 at 04:00pm, Lu Baolu wrote: 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. The first patch adds a file in debugfs, through

[PATCH v2 02/12] x86: fixmap: add permanent fixmap for xhci debug port

fixed_addresses table for xHCI mmio access. Signed-off-by: Lu Baolu --- arch/x86/include/asm/fixmap.h | 4 1 file changed, 4 insertions(+) diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index f80d700..fbf452f 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include

[PATCH v2 09/12] x86: early_printk: add USB3 debug port earlyprintk support

Add support for early printk by writing debug messages to the USB3 debug port. Users can use this type of early printk by specifying kernel parameter of "earlyprintk=xdbc". This gives users a chance of providing debug output. Signed-off-by: Lu Baolu --- Documentation/kernel-parameter

[PATCH v2 07/12] usb: xhci: dbc: handle dbc-configured exit

DbC might exit configured state in some cases (refer to 7.6.4.4 in xHCI spec 1.1). Software needs detect and clear this situation by clearing DCCTRL.DCR and wait until the DbC configured before read or write oprations. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 28

[PATCH v2 00/12] usb: early: add support for early printk through USB3 debug port

uot; 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. Lu Baolu (12): usb: xhci: add sysfs file for xHCI debug port x86: fixmap: add permanent fixmap for xhci debug por

[PATCH v2 01/12] usb: xhci: add sysfs file for xHCI debug port

file will show users the state (disabled, enabled or configured) of the debug port. With a host that does NOT support debug port, "debug_port_state" file won't be created. Signed-off-by: Lu Baolu --- .../ABI/testing/sysfs-bus-pci-drivers-xhci_hcd | 23 +

[PATCH v2 04/12] usb: xhci: dbc: add support for Intel xHCI dbc quirk

port reset to the debug port from the host xHCI. This patch introduces this work around. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 52 include/linux/usb/xhci-dbc.h | 2 ++ 2 files changed, 54 insertions(+) diff --git a/drivers/usb

[PATCH v2 06/12] usb: xhci: dbc: add bulk out and bulk in interfaces

This patch adds interfaces for bulk out and bulk in ops. These interfaces could be used to implement early printk bootconsole or hook to various system debuggers. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 373 +++ include/linux/usb/xhci

[PATCH v2 05/12] usb: xhci: dbc: add debug buffer

DBC_DEBUG is defined. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 62 ++-- 1 file changed, 60 insertions(+), 2 deletions(-) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 6b23f09..b36a527 100644 --- a/drivers

[PATCH v2 12/12] usb: doc: add document for xHCI DbC driver

Add Documentation/usb/xhci-dbc.txt. This document includes development status and user guide for USB3 debug port. Signed-off-by: Lu Baolu --- Documentation/usb/xhci-dbc.txt | 325 + MAINTAINERS| 1 + drivers/usb/early/xhci-dbc.c

[PATCH v2 11/12] usb: serial: usb_debug: add support for dbc debug device

This patch add dbc debug device support in usb_debug driver. Signed-off-by: Lu Baolu --- drivers/usb/serial/usb_debug.c | 28 +--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial/usb_debug.c index ca2fa5b

[PATCH v2 03/12] usb: xhci: dbc: probe and setup xhci debug capability

between the debug host and target. Signed-off-by: Lu Baolu --- MAINTAINERS | 7 + arch/x86/Kconfig.debug | 12 + drivers/usb/early/Makefile | 1 + drivers/usb/early/xhci-dbc.c | 787 +++ include/linux/usb/xhci-dbc.h | 187

[PATCH v2 10/12] usb: xhci: dbc: add handshake between debug target and host

'y' in the tty application. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 27 +++ 1 file changed, 27 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 68a7139..b75c523 100644 --- a/drivers/usb/early/xhci-dbc

[PATCH v2 08/12] usb: xhci: dbc: handle endpoint stall

. Signed-off-by: Lu Baolu --- drivers/usb/early/xhci-dbc.c | 36 1 file changed, 36 insertions(+) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 8a5a51f..aaf655f 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early

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