Adding runtime PM control at .set_suspend API, then the controller
driver could align PHY's power status with its runtime PM status.
Power domain needs driver's runtime callback to call its runtime
callback and turn on/off power domain according. So, the runtime
pm callback is a must for power domain supported devices.
With this support added, the subsystem (USB PHY in it) with power
domain supported could enter low power mode, and save the power
accordingly.
Cc: Ranjani Vaidyanathan <ranjani.vaidyanathan@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
The default 40ms is the minimum value according to BC 1.2 spec,
it works not well for Type-C port when connected with DCP charger.
Like this ticket described, the DCP charger will be recognized as
SDP. After increasing TVDPSRC_ON value to 240ms, the Type-C port could
work well with DCP charger.
imx8dxl mek, imx7ulp evk and imx8qxp mek are tested.
Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
The DCD is a hardware IP in USB PHY which is used for USB charger
detection, we use polling method for charger detection in this
design to avoid unknown USB PHY interrupt. Currently, the
imx8qm, imx8qxp and imx7ulp have DCD module.
Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
USB2 PLL use ring VCO, when the PLL power up, the ring VCO’s supply also
ramp up. There is a possibility that the ring VCO start oscillation at
multi nodes in this phase, especially for VCO which has many stages, then
the multiwave will kept until PLL power down. Hold_ring_off(bit11) can
force the VCO in one determined state when VCO supply start ramp up, to
avoid this multiwave issue. Per IC design's suggestion it's better this
bit can be off from 25us after pll power up to 25us before USB TX/RX.
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
(cherry picked from commit a094377f04c9ed2c8e702ee7bfab843caa03eb96)
We only have below cases to disconnect line when suspend:
1. Device mode without connection to any host/charger(no vbus).
2. Device mode connect to a charger(w/ vbus), usb suspend when
system is entering suspend.
This patch can fix usb phy wrongly does disconnect line in case
some usb host enters suspend but vbus is off.
Signed-off-by: Li Jun <jun.li@nxp.com>
(cherry picked from commit 2af48913f77cec3658f5863b13f63619d8101279)
For imx6ul PHY, when the system enters suspend, its 1p1 is off by default,
that may cause the PHY get inaccurate USB DP/DM value. If the USB wakeup
is enabled at this time, the unexpected wakeup may occur when the system
enters suspend.
In this patch, when the vbus is there, we enable weak 1p1 during the PHY
suspend API, in that case, the USB DP/DM will be accurate for USB PHY,
then unexpected usb wakeup will not be occurred, especially for the USB
charger is connected scenario. The user needs to enable PHY wakeup for
USB wakeup function using below setting.
echo enabled > /sys/devices/platform/soc/2000000.aips-bus/20c9000.usbphy
/power/wakeup
Cc: Shaojun Wang <shaojun.wang@nxp.com>
Cc: Anson Huang <anson.huang@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
For mxs PHY, if there is a vbus but the bus is not enumerated,
force the dp/dm as SE0 from the consider side. If not, there
is possible USB wakeup due to unstable dp/dm, since there is
possible no pull on dp/dm, eg, there is a USB charger on the
port. Note, the vbus event is only occurred at device mode,
and sent by udc driver.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
This wakeup setting can enable USB wakeup function even the
controller's power is lost, and both A7 and M4 are in VLLS mode.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Per IC engineer request, we need to keep USBPHY2's clk always on,
in this way, the USBPHY2 (PLL7) power can be controlled by
hardware suspend signal totally. It is benefit of USB remote wakeup
case which needs the resume signal be sent out as soon as
possible (without software interfere).
It is intended to fix the issue which this ticket describes, the
reason for this issue is the host does not send resume in time.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
(cherry picked from commit 98888b352377f9ebaee03bedce8c239691f45262)
It is one of PHY's power, and we need to enable it to keep signal
quality good, and pass eye diagram test.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
(cherry picked from commit 3a8670ee7ff698521369e8292bba7ef288a12335)
Implementation of notify_suspend and notify_resume will be different
according to mxs_phy_data->flags.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
(cherry picked from commit d1ce766d9aabdfb823131d38056ff67c94e7e20a)
At imx7ulp, the USB related analog register is located in PHY register
region too, so we need to control PLL at PHY driver directly.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Since this driver already handles changer detction state, copy the
workaround code currently residing in arch/arm/mach-imx/anatop.c into
this drier to consolidate the places modifying it.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-usb@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Trivial fix to spelling mistake in dev_dbg message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
mxs_charger_secondary_detection() is only used in this file, so make
it static.
This fixes the following sparse warning:
drivers/usb/phy/phy-mxs-usb.c:581:23: warning: symbol 'mxs_charger_secondary_detection' was not declared. Should it be static?
Acked-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Commit e93650994a ("usb: phy: mxs: add usb charger type detection")
causes the following kernel hang on i.MX28:
[ 2.207973] usbcore: registered new interface driver usb-storage
[ 2.235659] Unable to handle kernel NULL pointer dereference at virtual address 00000188
[ 2.244195] pgd = (ptrval)
[ 2.246994] [00000188] *pgd=00000000
[ 2.250676] Internal error: Oops: 5 [#1] ARM
[ 2.254979] Modules linked in:
[ 2.258089] CPU: 0 PID: 1 Comm: swapper Not tainted 4.15.0-rc8-next-20180117-00002-g75d5f21 #7
[ 2.266724] Hardware name: Freescale MXS (Device Tree)
[ 2.271921] PC is at regmap_read+0x0/0x5c
[ 2.275977] LR is at mxs_phy_charger_detect+0x34/0x1dc
mxs_phy_charger_detect() makes accesses to the anatop registers via regmap,
however i.MX23/28 do not have such registers, which causes a NULL pointer
dereference.
Fix the issue by doing a NULL check on the 'regmap' pointer.
Fixes: e93650994a ("usb: phy: mxs: add usb charger type detection")
Cc: <stable@vger.kernel.org> # v4.15
Reviewed-by: Li Jun <jun.li@nxp.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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>
mxs phy has data pin contact and usb charger detector blocks which
can be controlled by software to detect charger type for SDP, CDP and
DCP.
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
The TX settings can be calibrated for particular hardware. The
phy is reset by Linux, so this cannot be handled by the bootloader.
The TRM mentions that the maximum resistance should be used for the
DN/DP calibration in order to pass USB certification.
The values for the TX registers are poorly described in the TRM.
The meanings of the register values were taken from another
NXP-provided document:
https://community.nxp.com/message/566147#comment-566912
Acked-by: Peter Chen <peter.chen@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jaret Cantu <jaret.cantu@timesys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Initialize vbus_value to be 0 since it's possible not to assign
any value before judgement.
Acked-by: Peter Chen <peter.chen@nxp.com
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Add "fsl,imx6ul-usbphy" compatible string for iMX6ul usb phy
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <jun.li@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
of_match_device could return NULL, and so cause a NULL pointer
dereference later.
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Triggering suspend to RAM via sysfs on a i.MX28 causes a NULL pointer
dereference. This patch avoids the oops in mxs_phy_get_vbus_status()
by aborting since there is no syscon available.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: efdbd3a5d6 ("usb: phy: mxs: do not set PWD.RXPWD1PT1 for low speed connection")
CC: <stable@vger.kernel.org> # 4.0
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
There is a request from IC engineer that if we doesn't
set phypwd as 0xffffffff, we need to delay about five
32Khz cycles before set phy's pwd register, otherwise,
the wakeup signal may can't wake up controller.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
At very rare cases, the SoF will not send out after resume with
low speed connection. The workaround is do not power down
PWD.RXPWD1PT1 bit during the suspend.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
For non-otg mode, we keep the usage of disconnect line between phy analog
and digital unchanging; for otg mode, at peripheral role, we keep the usage
unchanging too, at host role, the digital part needs to know dp/dm change
to respond device's data pulse when it is at low power mode.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The RLT code has already done it, so no software operation is needed.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
For some user cases, like plug out and replug in usb device during
the system suspend, the speed negotiation will be error due to host
doesn't know the device's disconnection, and it still hopes the
high speed device, but the device backs to "powered" state which
its high speed termination is not enabled, the usb core calls
the PHY's disconnect notifier with "full speed", it will NOT
take effect at all.
If the usb core calls disconnect notifer, the port change must happen,
so it is safe to disable high speed disconenct detector, since
connect notifier will be called soon if the device is still connected
on the port, and we will enable high speed disconnect detector at that
time.
Acked-by: Li Jun <b47624@freescale.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When we shut down the PHY, we need to power down all PHY's functions
as well as disable wakeup, it is the opposite operation we do at .init.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Here's the set of driver core patches for 3.19-rc1.
They are dominated by the removal of the .owner field in platform
drivers. They touch a lot of files, but they are "simple" changes, just
removing a line in a structure.
Other than that, a few minor driver core and debugfs changes. There are
some ath9k patches coming in through this tree that have been acked by
the wireless maintainers as they relied on the debugfs changes.
Everything has been in linux-next for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM
53kAoLeteByQ3iVwWurwwseRPiWa8+MI
=OVRS
-----END PGP SIGNATURE-----
Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core update from Greg KH:
"Here's the set of driver core patches for 3.19-rc1.
They are dominated by the removal of the .owner field in platform
drivers. They touch a lot of files, but they are "simple" changes,
just removing a line in a structure.
Other than that, a few minor driver core and debugfs changes. There
are some ath9k patches coming in through this tree that have been
acked by the wireless maintainers as they relied on the debugfs
changes.
Everything has been in linux-next for a while"
* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
fs: debugfs: add forward declaration for struct device type
firmware class: Deletion of an unnecessary check before the function call "vunmap"
firmware loader: fix hung task warning dump
devcoredump: provide a one-way disable function
device: Add dev_<level>_once variants
ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
ath: use seq_file api for ath9k debugfs files
debugfs: add helper function to create device related seq_file
drivers/base: cacheinfo: remove noisy error boot message
Revert "core: platform: add warning if driver has no owner"
drivers: base: support cpu cache information interface to userspace via sysfs
drivers: base: add cpu_device_create to support per-cpu devices
topology: replace custom attribute macros with standard DEVICE_ATTR*
cpumask: factor out show_cpumap into separate helper function
driver core: Fix unbalanced device reference in drivers_probe
driver core: fix race with userland in device_add()
sysfs/kernfs: make read requests on pre-alloc files use the buffer.
sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
fs: sysfs: return EGBIG on write if offset is larger than file size
...
The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This adds support for the USB PHY in Vybrid VF610. We assume that
the disconnection without VBUS is also needed for Vybrid.
Tests showed, without MXS_PHY_NEED_IP_FIX, enumeration of devices
behind a USB Hub fails with errors:
[ 215.163507] usb usb1-port1: cannot reset (err = -32)
[ 215.170498] usb usb1-port1: cannot reset (err = -32)
[ 215.185120] usb usb1-port1: cannot reset (err = -32)
[ 215.191345] usb usb1-port1: cannot reset (err = -32)
[ 215.202487] usb usb1-port1: cannot reset (err = -32)
[ 215.207718] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[ 215.219317] usb usb1-port1: unable to enumerate USB device
Hence we also enable the MXS_PHY_NEED_IP_FIX flag.
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Felipe Balbi <balbi@ti.com>
After clear portsc.phcd, PHY needs 200us stable time for switch
32K clock to AHB clock.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We need this to keep PHY's power on or off during the system
suspend mode. If we need to enable USB wakeup, then we
must keep PHY's power being on during the system suspend mode.
Otherwise, we need to keep PHY's power being off to save power.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When we need the PHY can be waken up by external signals,
we can call this API. Besides, we call mxs_phy_disconnect_line
at this API to close the connection between USB PHY and
controller, after that, the line state from controller is SE0.
Once the PHY is out of power, without calling mxs_phy_disconnect_line,
there are unknown wakeups due to dp/dm floating at device mode.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
It is used to access un-regulator registers according to
different controllers.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Two PHY bugs are fixed by IC logic, but these bits are not
enabled by default, so we enable them at driver.
The two bugs are: MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST
which are described at code.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Change "high speed" to "HS"
Change "non-high speed" to "FS/LS"
Implementation of notify_suspend and notify_resume will be different
according to mxs_phy_data->flags.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
It is needed by imx6 SoC series, but not for imx23 and imx28.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The auto setting is used to open related power and clocks
automatically after receiving wakeup signal.
With this feature, the PHY's clock and power can be recovered
correctly from low power mode, it is guaranteed by IC logic.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The mxs-phy has several bugs and features at different
versions, the driver code can get it through of_device_id.data.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.15 (GNU/Linux)
iQEcBAABAgAGBQJSrhGrAAoJEHm+PkMAQRiGsNoH/jIK3CsQ2lbW7yRLXmfgtbzz
i2Kep6D4SDvmaLpLYOVC8xNYTiE8jtTbSXHomwP5wMZ63MQDhBfnEWsEWqeZ9+D9
3Q46p0QWuoBgYu2VGkoxTfygkT6hhSpwWIi3SeImbY4fg57OHiUil/+YGhORM4Qc
K4549OCTY3sIrgmWL77gzqjRUo+pQ4C73NKqZ3+5nlOmYBZC1yugk8mFwEpQkwhK
4NRNU760Fo+XIht/bINqRiPMddzC15p0mxvJy3cDW8bZa1tFSS9SB7AQUULBbcHL
+2dFlFOEb5SV1sNiNPrJ0W+h2qUh2e7kPB0F8epaBppgbwVdyQoC2u4uuLV2ZN0=
=lI2r
-----END PGP SIGNATURE-----
Merge tag 'v3.13-rc4' into next
Linux 3.13-rc4
* tag 'v3.13-rc4': (1001 commits)
Linux 3.13-rc4
null_blk: mem garbage on NUMA systems during init
radeon_pm: fix oops in hwmon_attributes_visible() and radeon_hwmon_show_temp_thresh()
Revert "selinux: consider filesystem subtype in policies"
igb: Fix for issue where values could be too high for udelay function.
i40e: fix null dereference
ARM: fix asm/memory.h build error
dm array: fix a reference counting bug in shadow_ablock
dm space map: disallow decrementing a reference count below zero
mm: memcg: do not allow task about to OOM kill to bypass the limit
mm: memcg: fix race condition between memcg teardown and swapin
thp: move preallocated PTE page table on move_huge_pmd()
mfd/rtc: s5m: fix register updating by adding regmap for RTC
rtc: s5m: enable IRQ wake during suspend
rtc: s5m: limit endless loop waiting for register update
rtc: s5m: fix unsuccesful IRQ request during probe
drivers/rtc/rtc-s5m.c: fix info->rtc assignment
include/linux/kernel.h: make might_fault() a nop for !MMU
drivers/rtc/rtc-at91rm9200.c: correct alarm over day/month wrap
procfs: also fix proc_reg_get_unmapped_area() for !MMU case
...
Signed-off-by: Felipe Balbi <balbi@ti.com>
We need to initialize the notifer before use it.
So lets initialize it when add a new phy device to
reduce the code redundancy.
Signed-off-by: Neil Zhang <zhangwm@marvell.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
clk_prepare_enable() may fail, so let's check its return value and propagate it
in the case of error.
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We need to set mxs_phy rather as the platform drvdata so that we can get
the correct mxs_phy in mxs_phy_remove().
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Peter Chen