arm: dts: tegra20: Rename USB UTMI parameters according to new definitions

This patch changes the Tegra20 USB PHY nodes to use the UTMI configuration
parameter names as specified in the device tree binding documentation
after patch "ARM: tegra: finalize USB EHCI and PHY bindings".

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: phy: tegra: Read UTMIP parameters from device tree

UTMIP parameters used to be hardcoded into tables in the
PHY driver. This patch reads them from the device tree instead
in accordance with the phy-tegra-usb DT documentation.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: tegra: Use regulators instead of GPIOs for USB PHY VBUS

The tegra ehci driver has enabled USB vbus regulators directly using
GPIOs and the device tree attribute nvidia,vbus-gpio. This is ugly
and causes error messages on boot when both the regulator driver
and the ehci driver want access to the same GPIO.

After this patch, usb vbus regulators for tegra usb phy devices are specified
with the device tree attribute vbus-supply = <&x> where x is a regulator defined
in the device tree. The old nvidia,vbus-gpio property is no longer supported.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: tegra: Add vbus-supply property for host mode PHYs

Document vbus-supply as an optional property for host mode phy-tegra-usb PHYs.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
arm: tegra: Remove obsolete nvidia,vbus-gpio properties

USB VBUS regulators are now specified with the vbus-supply property
instead of nvidia,vbus-gpio, so remove the obsolete properties.

The equivalent vbus-supply properties were already added in patch
"ARM: tegra: update device trees for USB binding rework".

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: tegra: Fix typo in tegra20-usb-phy documentation

The device tree binding documentation for tegra20-usb-phy used to claim
that the vbus-supply property is required for host phys and optional
for otg phys. This should be the other way around.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: phy: tegra: Remove unnecessary 'dev' field

struct usb_phy already has a field for the device pointer, so this
unnecessary field can be removed.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: host: tegra: Remove leftover code

ehci-tegra calls devm_usb_get_phy, which will never succeed since the Tegra
PHY does not register itself with the PHY subsystem. It is also completely
redundant since the code has already located a PHY via an internal API.

Call otg_set_host unconditionally to simplify the code since it should
be safe to do so.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: tegra: host: Remove references to plat data

Platform data is not used in tegra-ehci anymore, so remove all
references to it.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
ARM: tegra: Remove USB platform data

USB-related platform data is not used anymore in the Tegra USB drivers,
so remove all of it.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: phy: tegra: Register as an USB PHY.

Register the Tegra PHY device instances with the PHY subsystem so that
the Tegra EHCI driver can locate a PHY via the standard APIs.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: host: tegra: Locate a PHY via standard API

Use devm_get_phy_by_phandle to get a PHY device instead of the custom
Tegra functions.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: phy: tegra: Remove custom PHY locating APIs

The Tegra EHCI driver is no longer using these custom functions, so they
can be removed.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: phy: tegra: Use DT helpers for phy_type

Use the new of_usb_get_phy_mode helper function for parsing phy_type
from the device tree.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: phy: tegra: Use DT helpers for dr_mode

Use the new of_usb_get_dr_mode helper function for parsing dr_mode
from the device tree. Also replace the usage of the custom
tegra_usb_phy_mode enum with the standard enum.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
usb: phy: tegra: Use switch instead of if-else

Use switch() instead of if-else when checking for the PHY type.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
ARM: dts: USB for Tegra114 Dalmore

Device tree entries for the three EHCI controllers on Tegra114.
Enables the the third controller (USB host) on Dalmore.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
usb: host: add has_tdi_phy_lpm capability bit

The has_hostpc capability bit indicates that the host controller has the
HOSTPC register extensions, but at the same time enables clock disabling
power saving features with the PHY Low Power Clock Disable (PHCD) bit.

However, some host controllers have the HOSTPC extensions but don't
support the low-power feature, so the PHCD bit must not be set on those
controllers. Add a separate capability bit for the low-power feature
instead, and change all existing users of has_hostpc to use this new
capability bit.

The idea for this commit is taken from an old 2012 commit that never got
merged ("disociate chipidea PHY low power suspend control from hostpc")

Inspired-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
usb: phy: tegra: Fix wrong PHY parameters

Some of the PHY parameters are not set according to the TRMs:

- UTMIP_FS_PREABMLE_J should be set, not cleared
- UTMIP_XCVR_LSBIAS_SEL should be cleared, not set
- UTMIP_PD_CHRG should be set in host mode and cleared in device mode
- UTMIP_XCVR_SETUP is a two-part field; the upper bits were not set
  properly

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
usb: phy: tegra: Tegra30 support

The Tegra30 USB PHY is a bit different than the Tegra20 PHY:

- The EHCI controller supports the HOSTPC register extension, and some
  of the fields that the PHY needs to modify (PHCD and PTS) have moved
  to the new HOSTPC register.
- Some of the UTMI PLL configuration registers have moved from the USB
  register space to the Clock-And-Reset controller space. In Tegra30
  the clock driver is responsible for configuring the UTMI PLL.
- The USBMODE register must be explicitly written to enter host mode.
- Certain PHY parameters need to be programmed for optimal signal
  quality. Support for this will be added in the next patch.

The new tegra_phy_soc_config structure is added to describe the
differences between the SoCs.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>