linux-toradex.git/drivers/usb/chipidea/udc.c, branch v4.15

USB: chipidea: Remove redundant license text

2017-11-07T14:45:01+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.

Cc: Thierry Reding 
Cc: Jonathan Hunter 
Acked-by: Peter Chen 
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: chipidea: do charger detection in vbus session

2017-09-21T03:15:56+00:00

In case the usb phy has the capability to detect usb charger type,
do it when vbus is on.

Signed-off-by: Li Jun 
Signed-off-by: Peter Chen

usb: chipidea: udc: Support SKB alignment quirk

2017-08-24T09:40:42+00:00

NVIDIA Tegra20 UDC can't cope with unaligned DMA and require a USB gadget
quirk that avoids SKB buffer alignment to be set in order to make Ethernet
Gadget working. Later Tegra generations do not require that quirk. Let's
add a new platform data flag that allows to enable USB gadget quirk for
platforms that require it.

Signed-off-by: Dmitry Osipenko 
Acked-by: Peter Chen 
Signed-off-by: Peter Chen

usb: chipidea: udc: compress return logic into line

2017-07-19T01:49:11+00:00

Simplify return logic to avoid unnecessary variable assignment.

This issue was detected using Coccinelle and the following
semantic patch:

@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;

Signed-off-by: Gustavo A. R. Silva 
Signed-off-by: Peter Chen

usb: chipidea: udc: fix NULL pointer dereference if udc_start failed

2017-05-18T01:07:14+00:00

Fix below NULL pointer dereference. we set ci->roles[CI_ROLE_GADGET]
too early in ci_hdrc_gadget_init(), if udc_start() fails due to some
reason, the ci->roles[CI_ROLE_GADGET] check in  ci_hdrc_gadget_destroy
can't protect us.

We fix this issue by only setting ci->roles[CI_ROLE_GADGET] if
udc_start() succeed.

[    1.398550] Unable to handle kernel NULL pointer dereference at
virtual address 00000000
...
[    1.448600] PC is at dma_pool_free+0xb8/0xf0
[    1.453012] LR is at dma_pool_free+0x28/0xf0
[    2.113369] [] dma_pool_free+0xb8/0xf0
[    2.118857] [] destroy_eps+0x4c/0x68
[    2.124165] [] ci_hdrc_gadget_destroy+0x28/0x50
[    2.130461] [] ci_hdrc_probe+0x588/0x7e8
[    2.136129] [] platform_drv_probe+0x50/0xb8
[    2.142066] [] driver_probe_device+0x1fc/0x2a8
[    2.148270] [] __device_attach_driver+0x9c/0xf8
[    2.154563] [] bus_for_each_drv+0x58/0x98
[    2.160317] [] __device_attach+0xc4/0x138
[    2.166072] [] device_initial_probe+0x10/0x18
[    2.172185] [] bus_probe_device+0x94/0xa0
[    2.177940] [] device_add+0x3f0/0x560
[    2.183337] [] platform_device_add+0x180/0x240
[    2.189541] [] ci_hdrc_add_device+0x440/0x4f8
[    2.195654] [] ci_hdrc_usb2_probe+0x13c/0x2d8
[    2.201769] [] platform_drv_probe+0x50/0xb8
[    2.207705] [] driver_probe_device+0x1fc/0x2a8
[    2.213910] [] __driver_attach+0xac/0xb0
[    2.219575] [] bus_for_each_dev+0x60/0xa0
[    2.225329] [] driver_attach+0x20/0x28
[    2.230816] [] bus_add_driver+0x1d0/0x238
[    2.236571] [] driver_register+0x60/0xf8
[    2.242237] [] __platform_driver_register+0x44/0x50
[    2.248891] [] ci_hdrc_usb2_driver_init+0x18/0x20
[    2.255365] [] do_one_initcall+0x38/0x128
[    2.261121] [] kernel_init_freeable+0x1ac/0x250
[    2.267414] [] kernel_init+0x10/0x100
[    2.272810] [] ret_from_fork+0x10/0x50

Cc: stable 
Fixes: 3f124d233e97 ("usb: chipidea: add role init and destroy APIs")
Signed-off-by: Jisheng Zhang 
Signed-off-by: Peter Chen

Merge tag 'usb-ci-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-next

2017-04-18T14:52:20+00:00

Peter writes:

Two changes for this v4.12-rc1:
- Add sysfs entry for role switch
- Update gadget state after gadget back from suspend

usb: chipidea: core: add sysfs group

2017-04-14T01:26:37+00:00

Sometimes, the user needs to adjust some properties for controllers, eg
the role for controller, we add sysfs group for them.

The attribute 'role' is used to switch host/gadget role dynamically, the
uewr can read the current role, and write the other role compare to
current one to finish the switch.

Signed-off-by: Peter Chen

usb: chipidea: use bus->sysdev for DMA configuration

2017-03-23T07:20:21+00:00

Set the dma for chipidea from sysdev. This is inherited from its
parent node. Also, do not set dma mask for child as it is not required
now.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Sriram Dash 
Acked-by: Peter Chen 
Signed-off-by: Mathias Nyman 
Signed-off-by: Peter Chen 
Signed-off-by: Greg Kroah-Hartman

usb: chipidea: udc: update gadget state after bus resume

2017-03-15T03:30:43+00:00

Gadget state is set to be suspended when bus suspened, but not updated
after resume, this patch saves the gadget state before suspend and
restores it after resume.

Signed-off-by: Li Jun 
Signed-off-by: Peter Chen