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16 commits

Author SHA1 Message Date
Stephen Warren
a4539a2aa7 usb: tegra: support device mode
A few changes are made to the Tegra EHCI driver so that it can set
everything up for device-mode operation on the first USB controller.
This can be used in conjunction with ci_udc.c to operate as a USB
device.

Detailed changes are:

* Rename set_host_mode() to set_up_vbus() since that's really what it
  does.

* Modify set_up_vbus() to know whether it's initializing in host or
  device mode, and:

  - Skip the external VBUS check in device mode, since external VBUS is
    expected in this case.

  - Disable VBUS output in device mode.

* Modify init_phy_mux() to know whether it's initializing in host or
  device mode, and hence skip setting USBMODE_CM_HC (which enables host
  mode) in device mode. See the comments in that function for why this
  is safe w.r.t. the ordering requirements of PHY selection.

* Modify init_utmi_usb_controller() to force "b session valid" in device
  mode, since the HW requires this. This is done in UTMI-specific code,
  since we only support device mode on the first USB controller, and that
  controller can only talk to a UTMI PHY.

* Enhance ehci_hcd_init() to error-check the requested host-/device-mode
  vs. the dr_mode (dual-role mode) value present in device tree, and the
  HW configurations which support device mode.

* Enhance ehci_hcd_init() not to skip HW initialization when switching
  between host and device mode on a controller. This requires remembering
  which mode the last initialization used.

Cc: Jim Lin <jilin@nvidia.com>
Cc: Stefan Agner <stefan@agner.ch>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-05-15 00:21:17 +02:00
Stephen Warren
2d34151f75 usb: tegra: refactor PHY type selection
Both init_{utmi,ulpi}_usb_controller() have nearly identical code for
PHY type selection. Pull this out into a common function to remove the
duplication.

Cc: Jim Lin <jilin@nvidia.com>
Cc: Stefan Agner <stefan@agner.ch>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-05-15 00:21:17 +02:00
Stephen Warren
9b20fe6f1a usb: tegra: fix PHY selection code
The TRM for Tegra30 and later all state that USBMODE_CM_HC must be set
before writing to hostpc1_devlc to select which PHY to use for a USB
controller. However, neither init_{utmi,ulpi}_usb_controller() do this
today, so the register writes they perform for PHY selection do not
work.

For the UTMI case, this was hacked around in commit 7e44d9320e "ARM:
Tegra: USB: EHCI: Add support for Tegra30/Tegra114" by adding code to
ehci_hcd_init() which sets USBMODE_CM_HC and duplicates the PHY
selection register write. This code doesn't cover the ULPI case, so I
wouldn't be surprised if ULPI doesn't work with the current code, unless
the ordering requirement only ends up being an issue in HW for UTMI not
ULPI.

This patch fixes init_{utmi,ulpi}_usb_controller() to correctly set
USBMODE_CM_HC before selecting the PHY. Now that this works, we can
remove the duplicate UTMI-specific code in ehci_hcd_init(), thus
simplifying that function.

Cc: Jim Lin <jilin@nvidia.com>
Cc: Stefan Agner <stefan@agner.ch>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-05-15 00:21:17 +02:00
Stefan Agner
8f9fd6caaf usb: tegra: combine header file
Combine the Tegra USB header file into one header file for all SoCs.
Use ifdef to account for the difference, especially Tegra20 is quite
different from newer SoCs. This avoids duplication, mainly for
Tegra30 and newer devices.

Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2014-04-17 08:41:06 -07:00
Stefan Agner
b1d615f3f1 usb: tegra: fix PHY configuration
On Tegra30 and later, the PTS (parallel transceiver select) and STS
(serial transceiver select) are part of the HOSTPC1_DEVLC_0 register
rather than PORTSC1_0 register. Since the reset configuration
usually matches the intended configuration, this error did not show
up on Tegra30 devices.

Also use the slightly different bit fields of first USB, (USBD) on
Tegra20 and move those definitions to the Tegra20 specific header
file.

Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2014-04-17 08:41:06 -07:00
Stefan Agner
b03f4b3742 usb: tegra: fix USB2 powerdown for Tegra30 and later
Clear the forced powerdown bit in the UTMIP_PLL_CFG2_0 register
which brings USB2 in UTMI mode to work. This was clearly missing
since the forced powerdown bit is set in reset by default for all
USB ports.

Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2014-04-17 08:41:06 -07:00
Troy Kisky
127efc4fe8 usb: ehci-hcd: add enum usb_init_type parameter to ehci_hcd_init.
This paramter will later be used to initialize OTG ports in
host or device mode.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
2013-10-20 23:46:27 +02:00
Mateusz Zalega
16297cfb2a usb: new board-specific USB init interface
This commit unifies board-specific USB initialization implementations
under one symbol (usb_board_init), declaration of which is available in
usb.h.

New API allows selective initialization of USB controllers whenever needed.

Signed-off-by: Mateusz Zalega <m.zalega@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
2013-10-20 23:42:40 +02:00
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Jim Lin
7e44d9320e ARM: Tegra: USB: EHCI: Add support for Tegra30/Tegra114
Tegra30 and Tegra114 are compatible except PLL parameters.

Tested on Tegra30 Cardhu, and Tegra114 Dalmore
platforms. All works well.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2013-07-11 14:15:15 -07:00
Lucas Stach
d7a55e1a4b tegra: usb: move [start|stop]_port into ehci_hcd_[init|stop]
The ehci_hcd entry points were just calling into the Tegra USB
functions. Now that they are in the same file we can just move over the
implementation.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2013-03-14 11:06:41 -07:00
Lucas Stach
7ae18f3725 tegra: usb: move implementation into right directory
This moves the Tegra USB implementation into the drivers/usb/host
directory. Note that this merges the old
/arch/arm/cpu/armv7/tegra20/usb.c file into ehci-tegra.c. No code
changes, just moving stuff around.

v2: While at it also move some defines and the usb.h header file to make
usb driver usable for Tegra30.
NOTE: A lot more work is required to properly init the PHYs and PLL_U on
Tegra30, this is just to make porting easier and it does no harm here.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2013-03-14 11:06:41 -07:00
Lucas Stach
a896211ff1 tegra20: port to new ehci interface
EHCI interface now supports more than one controller. Wire up our usb functions
to use this new interface.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
2012-10-15 11:54:00 -07:00
Lucas Stach
676ae068d9 usb: ehci: rework to take advantage of new lowlevel interface
Kill off ehci-core.h
It was used to specify some static controller data. To support more than
one controller being active at any time we have to carry the controller
data ourselfes. Change the ehci interface accordingly.

NOTE: OMAP implemented the ehci stuff a bit backwards and should be fixed
to do the same thing as other platforms. But the change for now is at least
compile clean.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Reviewed-by: Marek Vasut <marex@denx.de>
2012-10-15 11:54:00 -07:00
Jim Lin
8b3f7bf7ec tegra: usb: Fix device enumeration problem of USB1
A known hardware issue of USB1 port where bit 1 (connect status
change) of PORTSC register will be set after issuing Port Reset
(like "usb reset" in u-boot command line).
This will be treated as an error and stops later device enumeration.

Therefore we clear that bit after Port Reset in order to proceed
later device enumeration.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2012-07-09 22:44:34 +02:00
Simon Glass
87f938c9f7 tegra: usb: Add support for Tegra USB peripheral
This adds basic support for the Tegra2 USB controller. Board files should
call board_usb_init() to set things up.

Configuration is performed through the FDT, with aliases used to set the
order of the ports, like this fragment:

        aliases {
		/* This defines the order of our USB ports */
                usb0 = "/usb@0xc5008000";
                usb1 = "/usb@0xc5000000";
        };

drivers/usb/host files ONLY: Acked-by: Remy Bohmer <linux@bohmer.net>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2012-03-29 08:12:48 +02:00