treewide: surround Kconfig file paths with double quotes ...

Based on Linux commit 8636a1f

This will be needed when you sync Kconfig with Linux 5.0 or later.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: dwc3: Toggle GCTL.CORESOFTRESET as a first step ...

Toggle GCTL.CORESOFTRESET before trying to access any of the block's
registers. Without this additional step, first read of DWC3_GHWPARAMS*
that follows results in assertion of GSTS.CSRTIMEOUT and IP block
stuck in a non-functional state.

Note that all above has only been observerd on i.MX8MQ (ZII Zest
board) for USB1 controller. USB2 doesn't seem to be affected by this.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/nvme'

Merge branch 'for-next/imx8-usb'

usb: imx: Do not disable VBUS on ehci_register()'s success ...

Original code was written to exit early on ehci_register()'s
success. As a part of e3eb0c729b, however, it was modified to to early
exit on failure instead. This resulted in VBUS being erroneously
disabled after EHCI controller was added, thus breaking USB on some
i.MX boards (confirmed on ZII's RDU2).

Fixes: e3eb0c729b ("usb: host: ehci: add ehci_unregister()")
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: usb251xb: add usb data lane port swap feature ...

Port of Linux patch https://patchwork.kernel.org/patch/10766235/

  The HW can swap the USB differential-pair (D+/D-) for each port
  separately. So the USB signals can be re-aligned with a misplaced
  USB connector on the PCB.

  Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
  Reviewed-by: Richard Leitner <richard.leitner@skidata.com>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Port Microchip USB251x USB hub driver from Linux ...

Port Microchip USB251x USB hub driver from Linux. Needed by ZII's
i.MX8MQ boards.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Import DWC3 USB controller driver from Linux ...

Import DWC3 USB controller driver from Linux. This is a bare minimum
port of the code needed to support USB host functionality on
i.MX8MQ. No other use-case is explicitly supported.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Make use of lo_hi_readq/writeq() ...

Make use of lo_hi_readq/writeq() to implement xhci_read/write_64()
helpers, same as it is done in the Linux kernel.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Simplify route string building loop ...

Simplify route string building loop by avoiding checking
top_dev->parent->descriptor->bDeviceClass twice.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Initialize TRT flag for xHCI >= 1.0 ...

Initialize TRT flag for xHCI >= 1.0, not just == 1.0. This is what
Linux xHCI driver does.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Check usb_pipein(pipe) only once in xhci_submit_normal() ...

Simplfy xhci_submit_normal()'s logic a bit by using helper variables
and making sure that usb_pipein(pipe) is only called once.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Drop 'dma' field from struct xhci_hcd ...

Drop 'dma' field from struct xhci_hcd since it is not really used
anywhere.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Simplify TRB initialization code ...

Current TRB initialization code in xHCI driver is:

    a) Somewhat inconsistent in endianness correctness: LE is insured
       in some places whereas in some places it isn't

    b) Somewhat inconsistent in how DMA buffer address is being
       written: some places utilize xhci_write_64, whereas others just
       assing cmd_trb field directly

    c) A bit wasetful since in a number of codepaths where TRB is used
       it is memset to zero first only to have 80+% of its fields
       changed to something else right after.

To fix all of the above introduce xhci_init_event_cmd_trb(), that will
initialize all of the fileds to desired values only once as well as
taking care of endianness.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Convert xhci_submit_control() to use dma_map_single() ...

Convert xhci_submit_control() to use dma_(un)map_single(). These
functions both allow us to handle potential physical/virtual address
differences as well as allowing to drop a number of typecasts.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Convert xhci_submit_normal() to use dma_map_single() ...

Convert xhci_submit_normal() to use dma_(un)map_single(). These
functions both allow us to handle potential physical/virtual address
differences as well as allowing to drop a number of typecasts.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Don't try to DMA sync if buffer is NULL ...

Driver's .submit_control() callback can and will be called with buffer
set to NULL (and length set to 0), so we need to make sure that we
don't try to DMA sync the buffer in that case. Add appropriate gurads
to make sure that doesn't happen.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Always wait for "Response Data" completion ...

Xhci_submit_control() submits TRB_DATA with TRB_IOC flag regardless of
the vlaue of req->requesttype, so we shouldn't gate waiting for the
event that will result from it with "req->requesttype &
USB_DIR_IN". Failing to do this will result in unstable USB
performance and will eventually cause the controller to fail
completely.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Add support for 64-byte context size ...

xHCI spec allows for various context to be either 32 or 64 bytes in
size, so we can't rely on struct definitions to correctly reflect data
layout. Port varios context accessors from Linux kernel and convert
the rest of the code to use them in order to be able to support both
context sizes.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Drop pointless bitwise or ...

On_hs_hub is a boolean, not a bitfiled, so usage of bitwise or is
unnecessary. Replace it with a regular assignement operator.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Make sure to initialize xhci->rings_list ...

Make sure to initialize xhci->rings_list, otherwise any use of the
driver will result in a crash.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Cast ~XHCI_IRQS to u32 ...

Cast ~XHCI_IRQS to u32 to avoid getting a warning on 64-bit builds.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Do not zero out DMA coherent memory ...

Memory returned by dma_alloc_coherent() should already be zeroed
out, so there's no need to do this explicitly.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: xhci-hcd: Tabify the file ...

Replace occasional all-whiltespace indentation with tabs for
consistency.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: Make use of device_pci_driver() ...

Replace all of the generic PCI boilerplate with device_pci_driver().

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

Merge branch 'for-next/fastboot'

usbgadget: dfu: remove useless break in the switch statement ...

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: gadget: fastboot: print fastboot messages also to the logs ...

It's nice to also see on the barebox side what is going on with
fastboot, so print the messages to the logs also.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: gadget: fastboot: simplify reboot ...

Now that we end the fastboot session when shutting down barebox
we can call restart_machine() directly and not in the completion
callback of the answer request.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>