usb: gadget: fsl_udc: Fix warnings on 64bit compilation ...

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

USB: gadget: fsl_udc: move register definitions to header file ...

The register definitions will be shared by the regular and the
pbl driver, so move them to a header file.

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

usb: gadget: fsl_udc: remove unnessary argument ...

fsl_build_dtd() returns the length of the dTD, but it is never used.
Remove the length argument from the function.

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

usb: gadget: fsl_udc: remove always-true null pointer checks ...

struct fsl_ep's name member can never be NULL because it is a character
array. Remove these superfluous null pointer checks.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: fsl_udc: Use dma_alloc_coherent() to get DMA address ...

Instead on relying virt_to_phys() to do virtual-to-physical address
conversion, make use of the fact that dma_alloc_coherent() can already
do that for us.

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

usb: gadget: set maxpacket_limit ...

Gadget update to 3.15 imported Linux patch e117e742d310 ("usb:
gadget: add "maxpacket_limit" field to struct usb_ep"):

  This patch adds "maxpacket_limit" to struct usb_ep. This field contains
  maximum value of maxpacket supported by driver, and is set in driver probe.
  This value should be used by autoconfig() function, because value of field
  "maxpacket" is set to value from endpoint descriptor when endpoint becomes
  enabled. So when autoconfig() function will be called again for this endpoint,
  "maxpacket" value will contain wMaxPacketSize from descriptior instead of
  maximum packet size for this endpoint.

  For this reason this patch adds new field "maxpacket_limit" which contains
  value of maximum packet size (which defines maximum endpoint capabilities).
  This value is used in ep_matches() function used by autoconfig().

  Value of "maxpacket_limit" should be set in UDC driver probe function, using
  usb_ep_set_maxpacket_limit() function, defined in gadget.h. This function
  set choosen value to both "maxpacket_limit" and "maxpacket" fields.

However said update didn't bring in all driver changes. Do it now.

Fixes: 2776d53d7ac8 ("USB: gadget: Update to 3.15")
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: gadget: fsl_udc: pass controller instance to unregister ...

ci_udc_unregister() used to unregister "the controller". Since we
may register multiple chipidea devices we called ci_udc_unregister()
for each of them. This led to messages like:

ERROR: imx-usb 53f80000.usb: gadget not registered.

Fix this by returning the registered controller. This allows us to call
ci_udc_unregister() only when we actually registered one before.

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

usb: gadget: fsl_udc: Drop using global variable ...

No need to use the global udc_controller variable when we are provided
an usb_gadget.

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

usb: chipidea: Add udc unregister for device removal ...

The host may assume that the usb device is still up and running after
booting if we do not deregister the udc here. I observed issues when the
linux kernel was using a usb gadget directly where the complete USB Hub
got disconnected through this.

This patch adds a proper USB disconnect for gadget devices.

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

usb: gadget: fsl_udc: convert to streaming DMA ops ...

Move to the common streaming DMA ops in order to get rid of
the direct usage of the ARM MMU functions for the cache
maintenance.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: move DMA alloc functions to dma.h ...

This better separates the DMA from the MMU functionality.

Also move all drivers that only depends on asm/mmu.h for the alloc
functions over to the common header.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: change dma_alloc/free_coherent to match other architectures ...

As a lot drivers currently rely on the 1:1 virt->phys mapping on ARM
we define DMA_ADDRESS_BROKEN to mark them. In order to use them on
other architectures with a different mapping they need proper fixing.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/resource-err-ptr'

USB: gadget: put poller into core ...

Instead of letting each driver implement usb_gadget_poll directly
implement this function in the core which then calls into the
drivers.

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

resource: Let dev_request_mem_region return an error pointer ...

For all users fix or add the error check.

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

USB: gadget: fsl_udc: Be more tolerant in fsl_ep_dequeue ...

When an endpoint hasn't been enabled ep->desc is NULL and
fsl_ep_dequeue crashes with a NULL pointer dereference. Check
ep->desc before continuing.

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

USB: gadget: fsl_udc: Warn about freeing queued descriptors ...

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

USB: gadget: Update to 3.15 ...

This updates the USB Gadget stack to Linux-3.15.

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

Conflicts:
	drivers/usb/core/Makefile

USB gadget: fsl: Bail out if no udc exists ...

When there is no udc registered bail out in usb_gadget_poll
instead of crashing the system.

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

usb: gadget: fsl: Fix registering from chipidea driver ...

The fsl gadget driver wants to configure the portsc register
with information from platform_data. When registered from the
chipidea driver there is no platform_data. Fix the resulting
crash by not derefencing platform_data when NULL. In this
case the PORTSC register is not touched, it will have been
configured by the chipidea driver in this case.

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

Merge branch 'for-next/usb'

USB i.MX: Add chipidea gadget support ...

This adds USB gadget support to the i.MX chipidea driver. Basically
we have to add a register function to the fsl udc driver and call
this from the chipidea driver if device mode is selected.

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

Use new device_platform_driver() macro for drivers ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

switch all platform_bus device/driver registering to platform_driver/device_register ...

now register_driver and register_device are for bus only usage.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Merge branch 'for-next/sparse'

USB gadget fsl: Put registers into iomem space ...

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

USB gadget fsl: request cacheline aligned buffer ...

The fsl udc driver allocates a buffer for small requests. The
driver then calls dma_inv_range later on it. This buffer happens
to be not cacheline aligned which means that a dma_inv_range can
corrupt other memory around the buffer.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[mkl: use dma_alloc]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fsl_udc: update and fix ...

- this patch sync fsl_udc.c with linux's driver,
- add a poller on usb_gadget_poll to get serial gadget working,
- return -EIO in usb_gadget_poll when udc is stopped (do detect
cable disonnection)
- tested on i.MX25 & i.MX35

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

introduce io.h ...

To allow for some generic io accessors introduce io.h and use
this instead of asm/io.h throughout the tree.

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

ARM: pass size to dma_free_coherent ...

We'll need it later once we remap dma memory.

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