usb: renesas_usbhs: Use renesas_usbhs_platform_info on of_device_id.data

In device tree environment, the previous code allocates
renesas_usbhs_platform_info by using devm_kzalloc() and then copies
usbhs_of_data to the allocated memory. This reason is some values
(e.g. .platform_callback.get_vbus) are overwritten by the driver,
but the of_device_id.data is "const". Now the driver doesn't have
such a code, so this patch uses renesas_usbhs_platform_info on
of_device_id.data.

Note that the previous code set the pdev->dev.platform_data pointer
even if device tree environment, but the value is not used. So,
this patch also remove such a code.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: renesas_usbhs: Add a common function for the .get_id

All platform related codes (rcar[23].c and rza{2}.c) has its own
.get_id function as "USBHS_GADGET". So, we can use a common
function for it.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: renesas_usbhs: replace udelay() with usleep_range()

According to Documentation/timers/timers-howto.txt, a driver should
use usleep_range() instead of udelay() on NON-ATOMIC CONTEXT if
"SLEEPING FOR ~USECS OR SMALL MSECS ( 10us - 20ms)".

Since the .hardware_init() and .power_ctrl() will run on NON-ATOMIC
CONTEXT, this patch replaces udelay() with usleep_range().

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: replace udelay() with usleep_range()

According to Documentation/timers/timers-howto.txt, a driver should
use usleep_range() instead of udelay() on NON-ATOMIC CONTEXT if
"SLEEPING FOR ~USECS OR SMALL MSECS ( 10us - 20ms)".

Since the .hardware_init() and .power_ctrl() will run on NON-ATOMIC
CONTEXT, this patch replaces udelay() with usleep_range().

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: renesas_usbhs: rcar3: Use OTG mode for R-Car D3

Since R-Car D3 can use OTG mode, this patch changes the UGCTRL2
value to UGCTRL2_USB0SEL_OTG and UGCTRL2_VBUSSEL like other R-Car
Gen3 SoCs.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Revert "usb: renesas_usbhs: set the mode by using extcon state for non-otg channel"

This reverts commit cd14247d5c14b9b20bb3d3dfcaa899ca22c8dccc.

R-Car D3 can use OTG mode in fact. So, the commit doesn't need anymore.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Revert "usb: renesas_usbhs: add extcon notifier to set mode for non-otg channel"

This reverts commit 8ada211d0383b72878582bd312b984a9eae62b30.

R-Car D3 can use OTG mode in fact. So, the commit doesn't need anymore.
In other words, like other R-Car Gen3 SoCs, R-Car D3 can change the mode
by using the phy-rcar-gen3-usb2 driver.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: rcar3: Use OTG mode for R-Car D3

Since R-Car D3 can use OTG mode, this patch changes the UGCTRL2
value to UGCTRL2_USB0SEL_OTG and UGCTRL2_VBUSSEL like other R-Car
Gen3 SoCs.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Revert "usb: renesas_usbhs: set the mode by using extcon state for non-otg channel"

This reverts commit cd14247d5c14b9b20bb3d3dfcaa899ca22c8dccc.

R-Car D3 can use OTG mode in fact. So, the commit doesn't need anymore.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Revert "usb: renesas_usbhs: add extcon notifier to set mode for non-otg channel"

This reverts commit 8ada211d0383b72878582bd312b984a9eae62b30.

R-Car D3 can use OTG mode in fact. So, the commit doesn't need anymore.
In other words, like other R-Car Gen3 SoCs, R-Car D3 can change the mode
by using the phy-rcar-gen3-usb2 driver.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: renesas_usbhs: add extcon notifier to set mode for non-otg channel

This patch adds extcon notifier callback to set the mode of
host/peripheral by using extcon state (e.g phy-rcar-gen3-usb2) for
non-otg channel (e.g. R-Car D3).

[Fengguang Wu: fixed sparse warning]

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: usbhs_rcar3_notifier() can be static

Fixes: 3a7cce26122e ("usb: renesas_usbhs: add extcon notifier to set mode for non-otg channel")
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: set the mode by using extcon state for non-otg channel

The usbhs_rcar3_power_and_pll_ctrl() will be used by non-otg channel
(e.g. R-Car D3) and the previous code has hardcoded as peripheral mode.
So, this patch sets the mode by using extcon state.
If the channel doesn't get any extcon devices, this driver's behavior
is the same as before.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: Add a function to write the UGCTRL2 register

To cleanup the code, this patch adds a function to write the UGCTRL2
register.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

USB: renesas_usbhs: Remove redundant license text

Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner. So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text. And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Rob Herring <robh@kernel.org>
Cc: Simon Horman <horms+renesas@verge.net.au>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Johan Hovold <johan@kernel.org>
Cc: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Cc: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

USB: add SPDX identifiers to all remaining files in drivers/usb/

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/usb/ and include/linux/usb* files with the correct
SPDX license identifier based on the license text in the file itself.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: renesas_usbhs: add support for R-Car D3

This patch adds support for R-Car D3. This SoC needs to release
the PLL reset by the UGCTRL register. So, since this is not the same
as other R-Car Gen3 SoCs, this patch adds a new type as
"USBHS_TYPE_RCAR_GEN3_WITH_PLL".

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: Fix UGCTRL2 value for R-Car Gen3

The latest HW manual (Rev.0.55) shows us this UGCTRL2.VBUSSEL bit.
If the bit sets to 1, the VBUS drive is controlled by phy related
registers (called "UCOM Registers" on the manual). Since R-Car Gen3
environment will control VBUS by phy-rcar-gen3-usb2 driver,
the UGCTRL2.VBUSSEL bit should be set to 1. So, this patch fixes
the register's value. Otherwise, even if the ID pin indicates to
peripheral, the R-Car will output USBn_PWEN to 1 when a host driver
is running.

Fixes: de18757e272d ("usb: renesas_usbhs: add R-Car Gen3 power control"
Cc: <stable@vger.kernel.org> # v4.6+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: add wait after initialization for R-Car Gen3

Since the controller on R-Car Gen3 doesn't have any status registers
to detect initialization (LPSTS.SUSPM = 1) and the initialization needs
up to 45 usec, this patch adds wait after the initialization. Otherwise,
writing other registers (e.g. INTENB0) will fail.

Fixes: de18757e272d ("usb: renesas_usbhs: add R-Car Gen3 power control")
Cc: <stable@vger.kernel.org> # v4.6+
Cc: <balbi@kernel.org>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: renesas_usbhs: make usbhs_write32() static

The usbhs_write32 function is not used outside of the rcar3.c
file, so fix the following sparse warning by making it static:

drivers/usb/renesas_usbhs/rcar3.c:26:6: warning: symbol 'usbhs_write32' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: renesas_usbhs: make usbhs_write32() static

The usbhs_write32 function is not used outside of the rcar3.c
file, so fix the following sparse warning by making it static:

drivers/usb/renesas_usbhs/rcar3.c:26:6: warning: symbol 'usbhs_write32' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

usb: renesas_usbhs: add R-Car Gen3 power control

Since the usb2 phy driver for gen3 (phy-rcar-gen3-usb2) cannot access
LPSTS and UGCTRL2 registers in the HSUSB module, this driver have to
initialize the registers. So, this patch adds such handling code into
rcar3.c.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>