linux-toradex.git/include/linux/usb/hcd.h, branch v5.12-rc5

usb: hcd.h: Remove RUN_CONTEXT

2020-11-14T10:24:49+00:00

The last user of RUN_CONTEXT was removed in commit
   97c17beb3b668 ("[PATCH] ehci-hcd (1/2):  portability (2.4), tasklet,")
in the history.git repo.

There are no users of RUN_CONTEXT, remove it.

Signed-off-by: Sebastian Andrzej Siewior 
Link: https://lore.kernel.org/r/20201113212704.2243807-1-bigeasy@linutronix.de
Signed-off-by: Greg Kroah-Hartman

usb: hci: add hc_driver as argument for usb_hcd_pci_probe

2020-05-15T13:44:34+00:00

usb_hcd_pci_probe expects users to call this with driver_data set as
hc_driver, that limits the possibility of using the driver_data for
driver data.

Add hc_driver as argument to usb_hcd_pci_probe and modify the callers
ehci/ohci/xhci/uhci to pass hc_driver as argument and freeup the
driver_data used

Tested xhci driver on Dragon-board RB3, compile tested ehci, ohci and
uhci.

[For all but the xHCI parts]
[For the xhci part]

Suggested-by: Mathias Nyman 
Acked-by: Alan Stern 
Acked-by: Mathias Nyman 
Signed-off-by: Vinod Koul 
Link: https://lore.kernel.org/r/20200514122039.300417-2-vkoul@kernel.org
Signed-off-by: Greg Kroah-Hartman

USB: Replace zero-length array with flexible-array member

2020-02-23T18:24:51+00:00

The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.

Also, notice that, dynamic memory allocations won't be affected by
this change:

"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")

Signed-off-by: Gustavo A. R. Silva 
Link: https://lore.kernel.org/r/20200220132017.GA29262@embeddedor
Signed-off-by: Greg Kroah-Hartman

Merge tag 'usb-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

2019-09-02T17:20:57+00:00

Felipe writes:

USB: Changes for v5.4 merge window

With only 45 non-merge commits, we have a small merge window from the
Gadget perspective.

The biggest change here is the addition of the Cadence USB3 DRD
Driver. All other changes are small, non-critical fixes or smaller new
features like the improvement to BESL handling in dwc3.

Signed-off-by: Felipe Balbi

* tag 'usb-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (45 commits)
usb: gadget: net2280: Add workaround for AB chip Errata 11
usb: gadget: net2280: Move all "ll" registers in one structure
usb: dwc3: gadget: Workaround Mirosoft's BESL check
usb:cdns3 Fix for stuck packets in on-chip OUT buffer.
usb: cdns3: Add Cadence USB3 DRD Driver
usb: common: Simplify usb_decode_get_set_descriptor function.
usb: common: Patch simplify usb_decode_set_clear_feature function.
usb: common: Separated decoding functions from dwc3 driver.
dt-bindings: add binding for USBSS-DRD controller.
usb: gadget: composite: Set recommended BESL values
usb: dwc3: gadget: Set BESL config parameter
usb: dwc3: Separate field holding multiple properties
usb: gadget: Export recommended BESL values
usb: phy: phy-fsl-usb: Make structure fsl_otg_initdata constant
usb: udc: lpc32xx: silence fall-through warning
usb: dwc3: meson-g12a: fix suspend resume regulator unbalanced disables
usb: udc: lpc32xx: remove set but not used 3 variables
usb: gadget: udc: core: Fix segfault if udc_bind_to_driver() for pending driver fails
usb: dwc3: st: Add of_dev_put() in probe function
usb: dwc3: st: Add of_node_put() before return in probe function
...

usb: add a HCD_DMA flag instead of guestimating DMA capabilities

2019-08-21T17:03:35+00:00

The usb core is the only major place in the kernel that checks for
a non-NULL device dma_mask to see if a device is DMA capable.  This
is generally a bad idea, as all major busses always set up a DMA mask,
even if the device is not DMA capable - in fact bus layers like PCI
can't even know if a device is DMA capable at enumeration time.  This
leads to lots of workaround in HCD drivers, and also prevented us from
setting up a DMA mask for platform devices by default last time we
tried.

Replace this guess with an explicit HCD_DMA that is set by drivers that
appear to have DMA support.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20190816062435.881-4-hch@lst.de
Signed-off-by: Greg Kroah-Hartman

usb: add a hcd_uses_dma helper

2019-08-15T13:18:05+00:00

The USB buffer allocation code is the only place in the usb core (and in
fact the whole kernel) that uses is_device_dma_capable, while the URB
mapping code uses the uses_dma flag in struct usb_bus.  Switch the buffer
allocation to use the uses_dma flag used by the rest of the USB code,
and create a helper in hcd.h that checks this flag as well as the
CONFIG_HAS_DMA to simplify the caller a bit.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20190811080520.21712-3-hch@lst.de
Signed-off-by: Greg Kroah-Hartman

usb: Add definitions for the USB2.0 hub TT requests

2019-08-12T05:54:49+00:00

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Felipe Balbi

USB: drop HCD_LOCAL_MEM flag

2019-06-03T14:00:08+00:00

With the addition of the local memory allocator, the HCD_LOCAL_MEM
flag can be dropped and the checks against it replaced with a check
for the localmem_pool ptr being initialized.

Signed-off-by: Laurentiu Tudor 
Tested-by: Fredrik Noring 
Reviewed-by: Greg Kroah-Hartman 
Signed-off-by: Christoph Hellwig

USB: use genalloc for USB HCs with local memory

2019-06-03T14:00:07+00:00

For HCs that have local memory, replace the current DMA API usage with
a genalloc generic allocator to manage the mappings for these devices.
To help users, introduce a new HCD API, usb_hcd_setup_local_mem() that
will setup up the genalloc backing up the device local memory. It will
be used in subsequent patches.  This is in preparation for dropping
the existing "coherent" dma mem declaration APIs.  The current
implementation was relying on a short circuit in the DMA API that in
the end, was acting as an allocator for these type of devices.

Signed-off-by: Laurentiu Tudor 
Tested-by: Fredrik Noring 
Reviewed-by: Greg Kroah-Hartman 
Signed-off-by: Christoph Hellwig

Merge tag 'usb-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

2019-05-03T16:05:27+00:00

Felipe writes:

USB: changes for v5.2 merge window

With a total of 50 non-merge commits, this is not a large pull
request. Most of the changes are, again, in dwc2 (37%) and dwc3 (32%)
with the rest of it scattered among other UDCs, function drivers and
device-tree bindings.

No really big feature this time around apart from support to Amlogic
being added to both dwc3 and dwc2 drivers.

* tag 'usb-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb: (50 commits)
  usb: dwc3: Rename DWC3_DCTL_LPM_ERRATA
  usb: dwc3: Fix default lpm_nyet_threshold value
  usb: dwc3: debug: Print GET_STATUS(device) tracepoint
  usb: dwc3: Do core validation early on probe
  usb: dwc3: gadget: Set lpm_capable
  usb: gadget: atmel: tie wake lock to running clock
  usb: gadget: atmel: support USB suspend
  usb: gadget: atmel_usba_udc: simplify setting of interrupt-enabled mask
  dwc2: gadget: Fix completed transfer size calculation in DDMA
  usb: dwc2: Set lpm mode parameters depend on HW configuration
  usb: dwc2: Fix channel disable flow
  usb: dwc2: Set actual frame number for completed ISOC transfer
  usb: gadget: do not use __constant_cpu_to_le16
  usb: dwc2: gadget: Increase descriptors count for ISOC's
  usb: introduce usb_ep_type_string() function
  usb: dwc3: move synchronize_irq() out of the spinlock protected block
  usb: dwc3: Free resource immediately after use
  usb: dwc3: of-simple: Convert to bulk clk API
  usb: dwc2: Delayed status support
  usb: gadget: udc: lpc32xx: rework interrupt handling
  ...