We should signal connect (pull up dp) after we have already
at peripheral mode, otherwise, the dp may be toggled due to
we reset controller or do disconnect during the initialization
for peripheral, then, the host may be confused during the
enumeration, eg, it finds the reset can't succeed, but the
device is still there, see below error message.

hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
hub 1-0:1.0: unable to enumerate USB device on port 1

Fixes: the issue existed when the otg fsm code was added.
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The res parameter passed to devm_usb_phy_match() is the location where the
pointer to the usb_phy is stored, hence it needs to be dereferenced before
comparing to the match data in order to find the correct match.

Fixes: 410219dc ("usb: otg: utils: devres: Add API's to associate a device with the phy")
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Cc: <stable@vger.kernel.org> # v3.6+
Signed-off-by: NFelipe Balbi <balbi@ti.com>

It can move all pullup/pulldown operation control to udc-core
through usb_gadget_connect/usb_gadget_disconnect according to
vbus status.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This commit updates udc core vbus status, and try to connect
or disconnect gadget.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Instead of iterate to find usb_udc according to usb_gadget, this
way is easier.

Alan Stern suggests this way too:
http://marc.info/?l=linux-usb&m=142168496528894&w=2Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

When the HCD is disconnected, the DMA transfers still in-flight were cleaned-up
but the count of available DMA channels (e.g. available_host_channels) was not
reset.
The pool of DMA channels can be depleted when doing unclean
disconnection of USB peripherals, and reaches the point where no
transfer was possible until the next reboot/reload of the driver.

Tested by putting a programmable USB mux on the port and randomly
plugging/unpluging a USB HUB with USB mass-storage key, USB-audio and
USB-ethernet dongle connected to its downstream ports, and also doing the
disconnection early while the devices are still enumerating to get more URBs
in-flight.
After the patch, the devices are still enumerating after thousands of cycles,
while the port was totally dead before.
Signed-off-by: NVincent Palatin <vpalatin@chromium.org>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This code is no longer used now that mach-msm has been removed.
Delete it.

Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Cc: David Brown <davidb@codeaurora.org>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Some Renesas SoCs have the USB-DMAC. It is able to terminate transfers
when a short packet is received, even if less bytes than the transfer
counter size have been received. Also, it is able to send a short
packet even if the packet size is not multiples of 8bytes.

Since the previous code has used the interruption of USBHS controller
when receiving packets even if this driver has used a dmac, a lot of
interruptions has happened. This patch will reduce such interruptions.

This patch allows to use the USB-DMAC on R-Car H2 and M2.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch fixes the setup sequence in xfer_work(). Otherwise,
sometimes a usb transaction will get stuck.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

To connect the channel of USB-DMAC to USBHS DnFIFO number, this patch
adds this channel/FIFO number in dma-names. Otherwise, this driver
needs to add analysis code for device tree.
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

USB_DIR_OUT happens to be zero, so the result of bitwise and is always 0.
Consequently, break will never happen in the SOFT_RESET case.
This patch uses a compatible condition with a non-zero USB_DIR_IN,
which might or might not evaluate to zero.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

There was a missing goto so we free "opts" and then dereference it.

Fixes: ee1cd515 ('usb: gadget: printer: add configfs support')
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

"num" is a u16 so it can't go higher than 65535.  kstrtou16() has a
range check built in so this is already handled.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The dwc2-pci driver requires the generic PHY. This fixes undefined
reference issues when it is not selected.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Use %ps for actual addresses, otherwise you'll get bad output
on arches like ppc64 where %pf expects a function descriptor
(which is not what __builtin_return_address returns).
Reviewed-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>
Cc: linux-usb@vger.kernel.org
CC: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If device is configured to work only in HOST or DEVICE mode, there is
no point in initializing both subdrivers. This patch also fixes
resource leakage if host subdriver fails to initialize.
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The pci driver now registers a platform driver, like in dwc3, and lets
its probe function do all the initialization. This allows it to
account for changes to the platform driver that were not added to the
pci driver. Also future changes to the probe function don't have to be
duplicated. This also has the effect of adding device and DRD mode to
the pci driver. Tested on the Synopsys HAPS PCIe platform.
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

udc is then checked for NULL, if NULL, it is then dereferenced as
udc->dev, it is found using Coccinelle.

We simplify the code to fix this problem, and we delete some conditions
at if {} which will never be met.
Reported-by: NTapasweni Pathak <tapaswenipathak@gmail.com>
Reported-by : Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

connect AR9271(USB wifi) to AM335x, and send a flood ping from Mac OSX,
AR9271 is stopped.

on USB bus, the following occurs.

 - OUT transaction is ACKed (NYET).
 - IN transaction is ACKed (512bytes).
 - PING-NAK transaction is continued for about 2 seconds (AR9271 timeout?).

In current imprementation, IN-transaction is not completed because it
checks the empty of TX-FIFO in cppi41_dma_callback().
As a result, communication to AR9271 stops.

This patch modified to check the empty of TX-FIFO only when OUT-transaction.
Signed-off-by: NTakeyoshi Kikuchi <kikuchi@centurysys.co.jp>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Commit 9eb07977 ("usb: phy: generic: fix the gpios to be optional")
calls gpiod_direction_output() in the probe function, so there is no need to
call it again, as we can simply call gpiod_set_value() directly.

Also, in usb_gen_phy_shutdown() we can simply put the GPIO directly in its
active level state and this allows us to simplify the nop_reset function to
treat only the reset case.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Function usb_ep_disable() causes completion of all requests queued
for given endpoint, so there is no need to dequeue them after endpoint
disabling.
Signed-off-by: NRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Not everybody uses a utf8 locale (unfortunately), so let's avoid
non-ascii characters in the kernel log. Replace the 3-byte utf8
sequence with a 3-byte ascii equivalent.
Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch add suspend/resume with wakeup support for Atmel USBA.

On suspend: We stay continuously clocked if Vbus signal is not
available. If Vbus signal is available we set the Vbus signal as a wake
up source then we stop the USBA itself and all clocks used by USBA.

On resume: We recover clocks and USBA if we stopped them. If a device is
currently connected at resume time we enable the controller.
Signed-off-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If USB PLL is not necessary for other USB drivers (e.g. OHCI and EHCI)
we will reduce power consumption by switching off the USB PLL if no USB
Host is currently connected to this USB Device.

We are using Vbus GPIO signal to detect Host presence. If Vbus signal is
not available then the device stays continuously clocked.
Signed-off-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Vbus IRQ handler needs a started UDC driver to work because it uses
udc->driver, which is set by the UDC start handler. The previous way
chosen was to return from interrupt if udc->driver is NULL using a
spinlock around the check.

We now request an auto disabled (IRQ_NOAUTOEN) Vbus signal IRQ instead
of an auto enabled IRQ followed by disable_irq(). This way we remove the
very small timeslot of enabled IRQ which existed previously between
request() and disable(). We don't need anymore to check if udc->driver
is NULL in IRQ handler.
Signed-off-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Suggested-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If vbus gpio is high at init, we should set vbus_prev to true
accordingly to the current vbus state. Without that, we skip the first
vbus interrupt because the saved vbus state is not consistent.
Signed-off-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Fixed a comment typo in drivers/usb/phy/of.c
Signed-off-by: NMickael Maison <mickael.maison@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Fixed a comment typo in drivers/usb/phy/phy-ab8500-usb.c
Signed-off-by: NMickael Maison <mickael.maison@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

replace numeric value with TYPE_NO_LUN (defined in <scsi/scsi.h>)
Signed-off-by: NTal Shorer <tal.shorer@gmail.com>
Acked-by: NMichal Nazarewicz <mina86@mina86.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch fix some spelling typo found in gadget.xml.
It is because this file is generated from comments in sources,
I had to fix comments in the source, instead of xml file itself.
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If we pass our own of_node to musb_core, at least
pinctrl settings will be duplicated, meaning that
pinctrl framework will try to select default pin
state for musb_core when they were already requested
by musb-dsps.

A Warning will be printed however things will still
work.
Reported-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

musb shouldn't have of_node and phy phandle is passed
to dsps device, not musb's.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Add support for configfs interface so that f_printer can be used as a
component of usb gadgets composed with it.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Substitute some boilerplate code with a dedicated macro.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

There are no old interface users left, so it can be removed.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The goal is to remove the old function interface, so its (only) user
must be converted to the new interface.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

In order to add configfs support, a usb function must be converted to use
the new interface. This patch converts the function to the new interface
and provides backward compatiblity layer, which can be removed after
all its users are converted to use the new interface.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The legacy printer gadget now contains both a reusable printer function
and legacy gadget proper implementations interwoven, but logically
separate. This patch factors out a reusable f_printer.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

With all the obstacles removed it is possible to allow more than one
instance of the printer function. Since the function requires allocating
character device region, a maximum number of allowed instances is defined.
Such an approach is used in f_acm and in f_hid.
With multiple instances it does not make sense to depend on a
lock_printer_io member of a dynamically allocated (and destroyed) struct
printer_dev to clean up after all instances of the printer function.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Verify that a given usb_ctrlrequest is meant for printer function.
The following parts of the request are tested:

- bmRequestType:Data transfer direction
- bmRequestType:Type
- bmRequestType:Recipient
- bRequest
- wValue for bRequest 1 and 2
- wLength

Additionally, the request is considered meant for this function
iff the decoded interface number matches dev->interface.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>