We need the USB fixes in here for testing and for other patches to be
applied on top of.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If memory accesses by the Tegra XUSB controller are translated through
the SMMU (System MMU), the hardware may continue accessing memory even
after the SMMU translations have been disabled during the shutdown
process and this can in turn cause unpredictable crashes.
Fix this by adding a shutdown implementation that ensures the hardware
is turned off during system reboot or shutdown.
Signed-off-by: Henry Lin <henryl@nvidia.com>
Signed-off-by: Haotien Hsu <haotienh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20230727074927.2428611-1-haotienh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.
Acked-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230718143027.1064731-1-robh@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This reverts commit 18fc7c435b.
The reverted commit was based on static analysis and a misunderstanding
of how PTR_ERR() and NULLs are supposed to work. When a function
returns both pointer errors and NULL then normally the NULL means
"continue operating without a feature because it was deliberately
turned off". The NULL should not be treated as a failure. If a driver
cannot work when that feature is disabled then the KConfig should
enforce that the function cannot return NULL. We should not need to
test for it.
In this code, the patch means that certain tegra_xusb_probe() will
fail if the firmware supports power-domains but CONFIG_PM is disabled.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Fixes: 18fc7c435b ("usb: xhci: tegra: Fix error check")
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/8baace8d-fb4b-41a4-ad5f-848ae643a23b@moroto.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The XHCI_PLAT quirk was only needed to ensure non-PCI xHC host avoided
setting up MSI interrupts in generic xhci codepaths.
The MSI setup code is now moved to PCI specific xhci-pci.c file so
the quirk is no longer needed.
Remove setting the XHCI_PLAT quirk for HiSilocon SoC xHC, NVIDIA Tegra xHC,
MediaTek xHC, the generic xhci-plat driver, and the checks for XHCI_PLAT
in xhci-pci.c MSI setup code.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Message-ID: <20230602144009.1225632-5-mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart from
emitting a warning) and this typically results in resource leaks. To improve
here there is a quest to make the remove callback return void. In the first
step of this quest all drivers are converted to .remove_new() which already
returns void. Eventually after all drivers are converted, .remove_new() is
renamed to .remove().
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230530071913.2192214-6-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit enables stream transfer protocol for Tegra XHCI.
Signed-off-by: Henry Lin <henryl@nvidia.com>
Signed-off-by: Jim Lin <jilin@nvidia.com>
Link: https://lore.kernel.org/r/20230512080423.27978-1-jilin@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently, the pci_resume method has only a flag indicating whether the
system is resuming from hibernation. In order to handle all PM events like
AUTO_RESUME (runtime resume from device in D3), RESUME (system resume from
s2idle, S3 or S4 states) etc change the pci_resume method to handle all PM
events.
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230428140056.1318981-2-Basavaraj.Natikar@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We need the USB fixes in here for testing, and this resolves two merge
conflicts, one pointed out by linux-next:
drivers/usb/dwc3/dwc3-pci.c
drivers/usb/host/xhci-pci.c
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When we set the dual-role port to Host mode, we observed the following
splat:
[ 167.057718] BUG: sleeping function called from invalid context at
include/linux/sched/mm.h:229
[ 167.057872] Workqueue: events tegra_xusb_usb_phy_work
[ 167.057954] Call trace:
[ 167.057962] dump_backtrace+0x0/0x210
[ 167.057996] show_stack+0x30/0x50
[ 167.058020] dump_stack_lvl+0x64/0x84
[ 167.058065] dump_stack+0x14/0x34
[ 167.058100] __might_resched+0x144/0x180
[ 167.058140] __might_sleep+0x64/0xd0
[ 167.058171] slab_pre_alloc_hook.constprop.0+0xa8/0x110
[ 167.058202] __kmalloc_track_caller+0x74/0x2b0
[ 167.058233] kvasprintf+0xa4/0x190
[ 167.058261] kasprintf+0x58/0x90
[ 167.058285] tegra_xusb_find_port_node.isra.0+0x58/0xd0
[ 167.058334] tegra_xusb_find_port+0x38/0xa0
[ 167.058380] tegra_xusb_padctl_get_usb3_companion+0x38/0xd0
[ 167.058430] tegra_xhci_id_notify+0x8c/0x1e0
[ 167.058473] notifier_call_chain+0x88/0x100
[ 167.058506] atomic_notifier_call_chain+0x44/0x70
[ 167.058537] tegra_xusb_usb_phy_work+0x60/0xd0
[ 167.058581] process_one_work+0x1dc/0x4c0
[ 167.058618] worker_thread+0x54/0x410
[ 167.058650] kthread+0x188/0x1b0
[ 167.058672] ret_from_fork+0x10/0x20
The function tegra_xusb_padctl_get_usb3_companion eventually calls
tegra_xusb_find_port and this in turn calls kasprintf which might sleep
and so cannot be called from an atomic context.
Fix this by moving the call to tegra_xusb_padctl_get_usb3_companion to
the tegra_xhci_id_work function where it is really needed.
Fixes: f836e78430 ("usb: xhci-tegra: Add OTG support")
Cc: stable@vger.kernel.org
Signed-off-by: Wayne Chang <waynec@nvidia.com>
Signed-off-by: Haotien Hsu <haotienh@nvidia.com>
Link: https://lore.kernel.org/r/20230327095548.1599470-1-haotienh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Drivers generally shouldn't be using of_irq_parse_one() directly as it
is a low-level interrupt parsing API. The exceptions are cases that need
the values from the 'interrupts' property.
This is not the case for Tegra XHCI driver as it just uses
of_irq_parse_one() to test for 'interrupts' being absent or invalid.
Instead, just make the interrupt optional on any error other than
deferred probe. The exact reason for failing to get the interrupt is not
that important.
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230228235322.13289-1-robh@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Program USB2 pad PD controls during port connect/disconnect, port
suspend/resume, and test mode, to reduce power consumption on
disconnect or suspend.
Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Co-developed-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Jim Lin <jilin@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20221111101813.32482-4-jilin@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This change adds Tegra234 XUSB host mode controller support.
In Tegra234, some of the registers have moved to bar2 space.
The new soc variable has_bar2 indicates the chip with bar2
area. This patch adds new reg helper to let the driver reuse
the same code for those chips with bar2 support.
Signed-off-by: Sing-Han Chen <singhanc@nvidia.com>
Co-developed-by: Wayne Chang <waynec@nvidia.com>
Signed-off-by: Wayne Chang <waynec@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20230111110450.24617-7-jonathanh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the function tegra_xusb_powerdomain_init(),
dev_pm_domain_attach_by_name() may return NULL in some cases,
so IS_ERR() doesn't meet the requirements. Thus fix it.
Fixes: 6494a9ad86 ("usb: xhci: tegra: Add genpd support")
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20220524121404.18376-1-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pm_runtime_get_sync will increment pm usage counter
even it failed. Forgetting to putting operation will
result in reference leak here. We fix it by replacing
it with pm_runtime_resume_and_get to keep usage counter
balanced.
Fixes: 41a7426d25 ("usb: xhci: tegra: Unlink power domain devices")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20220319023822.145641-1-zhangqilong3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The added #ifdefs in the PM rework were almost correct, but still
cause warnings in some randconfig builds:
drivers/usb/host/xhci-tegra.c:2147:12: error: 'tegra_xusb_resume' defined but not used [-Werror=unused-function]
2147 | static int tegra_xusb_resume(struct device *dev)
| ^~~~~~~~~~~~~~~~~
drivers/usb/host/xhci-tegra.c:2105:12: error: 'tegra_xusb_suspend' defined but not used [-Werror=unused-function]
2105 | static int tegra_xusb_suspend(struct device *dev)
Replace the #ifdef checks with simpler __maybe_unused annotations to
reliably shut up these warnings.
Link: https://lore.kernel.org/all/20210421135613.3560777-2-arnd@kernel.org/
Fixes: 971ee24706 ("usb: xhci: tegra: Enable ELPG for runtime/system PM")
Reviewed-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211005112057.2700888-1-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Here is the big set of USB and Thunderbolt patches for 5.14-rc1.
Nothing major here just lots of little changes for new hardware and
features. Highlights are:
- more USB 4 support added to the thunderbolt core
- build warning fixes all over the place
- usb-serial driver updates and new device support
- mtu3 driver updates
- gadget driver updates
- dwc3 driver updates
- dwc2 driver updates
- isp1760 host driver updates
- musb driver updates
- lots of other tiny things.
Full details are in the shortlog.
All of these have been in linux-next for a while now with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / Thunderbolt updates from Greg KH:
"Here is the big set of USB and Thunderbolt patches for 5.14-rc1.
Nothing major here just lots of little changes for new hardware and
features. Highlights are:
- more USB 4 support added to the thunderbolt core
- build warning fixes all over the place
- usb-serial driver updates and new device support
- mtu3 driver updates
- gadget driver updates
- dwc3 driver updates
- dwc2 driver updates
- isp1760 host driver updates
- musb driver updates
- lots of other tiny things.
Full details are in the shortlog.
All of these have been in linux-next for a while now with no reported
issues"
* tag 'usb-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (223 commits)
phy: qcom-qusb2: Add configuration for SM4250 and SM6115
dt-bindings: phy: qcom,qusb2: document sm4250/6115 compatible
dt-bindings: usb: qcom,dwc3: Add bindings for sm6115/4250
USB: cdc-acm: blacklist Heimann USB Appset device
usb: xhci-mtk: allow multiple Start-Split in a microframe
usb: ftdi-elan: remove redundant continue statement in a while-loop
usb: class: cdc-wdm: return the correct errno code
xhci: remove redundant continue statement
usb: dwc3: Fix debugfs creation flow
usb: gadget: hid: fix error return code in hid_bind()
usb: gadget: eem: fix echo command packet response issue
usb: gadget: f_hid: fix endianness issue with descriptors
Revert "USB: misc: Add onboard_usb_hub driver"
Revert "of/platform: Add stubs for of_platform_device_create/destroy()"
Revert "usb: host: xhci-plat: Create platform device for onboard hubs in probe()"
Revert "arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub"
xhci: solve a double free problem while doing s4
xhci: handle failed buffer copy to URB sg list and fix a W=1 copiler warning
xhci: Add adaptive interrupt rate for isoch TRBs with XHCI_AVOID_BEI quirk
xhci: Remove unused defines for ERST_SIZE and ERST_ENTRIES
...
This node pointer is returned by of_parse_phandle() with refcount
incremented in this function. of_node_put() on it before exitting
this function.
Fixes: 971ee24706 ("usb: xhci: tegra: Enable ELPG for runtime/system PM")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210616044519.2183826-2-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Goto put_padctl to put refcount of device on error in tegra_xusb_probe()
Fixes: 971ee24706 ("usb: xhci: tegra: Enable ELPG for runtime/system PM")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210616044519.2183826-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit implements the complete programming sequence for ELPG
entry and exit.
1. At ELPG entry, invokes tegra_xusb_padctl_enable_phy_sleepwalk()
and tegra_xusb_padctl_enable_phy_wake() to configure XUSB PADCTL
sleepwalk and wake detection circuits to maintain USB lines level
and respond to wake events (wake-on-connect, wake-on-disconnect,
device-initiated-wake).
2. At ELPG exit, invokes tegra_xusb_padctl_disable_phy_sleepwalk()
and tegra_xusb_padctl_disable_phy_wake() to disarm sleepwalk and
wake detection circuits.
At runtime suspend, XUSB host controller can enter ELPG to reduce
power consumption. When XUSB PADCTL wake detection circuit detects
a wake event, an interrupt will be raised. xhci-tegra driver then
will invoke pm_runtime_resume() for xhci-tegra.
Runtime resume could also be triggered by protocol drivers, this is
the host-initiated-wake event. At runtime resume, xhci-tegra driver
brings XUSB host controller out of ELPG to handle the wake events.
The same ELPG enter/exit procedure will be performed for system
suspend/resume path so USB devices can remain connected across SC7.
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit unlinks xhci-tegra platform device with SS/host power
domain devices. Reasons for this change is - at ELPG entry, PHY
sleepwalk and wake configuration need to be done before powering
down SS/host partitions, and PHY need be powered off after powering
down SS/host partitions. Sequence looks like roughly below:
tegra_xusb_enter_elpg() -> xhci_suspend()
-> enable PHY sleepwalk and wake if needed
-> power down SS/host partitions
-> power down PHY
If SS/host power domains are linked to xhci-tegra platform device, we
are not able to perform the sequence like above.
This commit introduces:
1. tegra_xusb_unpowergate_partitions() to power up SS and host
partitions together. If SS/host power domain devices are
available, it invokes pm_runtime_get_sync() to request power
driver to power up partitions; If power domain devices are not
available, tegra_powergate_sequence_power_up() will be used to
power up partitions.
2. tegra_xusb_powergate_partitions() to power down SS and host
partitions together. If SS/host power domain devices are
available, it invokes pm_runtime_put_sync() to request power
driver to power down partitions; If power domain devices are not
available, tegra_powergate_power_off() will be used to power down
partitions.
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Use %ptTs instead of open coded variant to print contents
of time64_t type in human readable form.
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20210511153958.34527-4-andriy.shevchenko@linux.intel.com
Occasionally, we are seeing some SuperSpeed devices resumes right after
being directed to U3. This commits add 500us delay to ensure LFPS
detector is disabled before sending ACK to firmware.
[ 16.099363] tegra-xusb 70090000.usb: entering ELPG
[ 16.104343] tegra-xusb 70090000.usb: 2-1 isn't suspended: 0x0c001203
[ 16.114576] tegra-xusb 70090000.usb: not all ports suspended: -16
[ 16.120789] tegra-xusb 70090000.usb: entering ELPG failed
The register write passes through a few flop stages of 32KHz clock domain.
NVIDIA ASIC designer reviewed RTL and suggests 500us delay.
Cc: stable@vger.kernel.org
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210115161907.2875631-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge 5.9-rc3 into usb-next
We want the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tegra_xusb_init_usb_phy() should initialize "otg_usb2_port" and
"otg_usb3_port" with -EINVAL because "0" is a valid value
represents usb2 port 0 or usb3 port 0.
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200811093143.699541-1-jckuo@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge 5.8-rc7 into usb-next
We want the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 5c4e8d3781 ("usb: host: xhci-tegra: Add support for XUSB
context save/restore") is using the IPFS 'num_offsets' value when
allocating memory for FPCI context instead of the FPCI 'num_offsets'.
After commit cad064f1bd ("devres: handle zero size in devm_kmalloc()")
was added system suspend started failing on Tegra186. The kernel log
showed that the Tegra XHCI driver was crashing on entry to suspend when
attempting the save the USB context. On Tegra186, the IPFS context has a
zero length but the FPCI content has a non-zero length, and because of
the bug in the Tegra XHCI driver we are incorrectly allocating a zero
length array for the FPCI context. The crash seen on entering suspend
when we attempt to save the FPCI context and following commit
cad064f1bd ("devres: handle zero size in devm_kmalloc()") this now
causes a NULL pointer deference when we access the memory. Fix this by
correcting the amount of memory we are allocating for FPCI contexts.
Cc: stable@vger.kernel.org
Fixes: 5c4e8d3781 ("usb: host: xhci-tegra: Add support for XUSB context save/restore")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20200715113842.30680-1-jonathanh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Tegra XUSB controller driver doesn't need to control the PLL power
supplies directly, but rather uses the pads provided by the XUSB pad
controller, which in turn is responsible for supplying power to the
PLLs.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20200612140205.2342900-1-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Get usb-phy's for availbale USB 2 phys. Register id notifiers for available
usb-phy's to receive role change notifications. Perform PP for the received
role change usb ports.
Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
[treding@nvidia.com: rebase onto Greg's usb-next branch]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Set the MODULE_FIRMWARE for tegra186, it's registered for 124/210 and
ensures the firmware is available at the appropriate time such as in
the initrd, else if the firmware is unavailable the driver fails with
the following errors:
tegra-xusb 3530000.usb: Direct firmware load for nvidia/tegra186/xusb.bin failed with error -2
tegra-xusb 3530000.usb: failed to request firmware: -2
tegra-xusb 3530000.usb: failed to load firmware: -2
tegra-xusb: probe of 3530000.usb failed with error -2
Fixes: 5f9be5f3f8 ("usb: host: xhci-tegra: Add Tegra186 XUSB support")
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200120141910.116097-1-pbrobinson@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This implements basic engine-level powergate support which allows the
XUSB controller to be put into a low power mode on system sleep and get
it out of that low power mode again on resume.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-11-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Define the offsets of the registers that need to be saved on suspend and
restored on resume for the various NVIDIA Tegra generations supported by
the XUSB driver.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-10-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The XUSB controller contains registers that need to be saved on suspend
and restored on resume in addition to the XHCI specific registers. Add
support for saving and restoring the XUSB specific context.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-9-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A number of things can currently go wrong after the XUSB controller has
been enabled, which means that it might need to be disabled again before
it has ever been used.
Avoid this by delaying runtime PM enablement until it's really required
right before registers are accessed for the first time.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-8-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The base address of the XUSB controller's registers is already stored in
the HCD. Move assignment to the HCD fields to an earlier point so that
they can be reused in the tegra_xusb_config() function. This avoids the
need to pass the base address as an extra parameter, which in turn comes
in handy in subsequent patches that need to call this function from the
suspend/resume paths where these values are no longer readily available.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-7-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Extract a helper that enables message generation from the firmware. This
removes clutter from tegra_xusb_probe() and will also come in useful for
subsequent patches that introduce suspend/resume support.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-6-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Falcon CPU state is a suboptimal indicator for firmware readiness,
since the Falcon can be in a running state if the firmware is handling
port state changes or running other tasks. Instead, the driver should
check the STS_CNR bit to determine whether or not the firmware has been
successfully loaded and is ready for XHCI operation.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-5-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Do not use a fixed duration sleep to wait for the DMA controller to
become ready. Instead, poll the L2IMEMOP_RESULT register for the VLD
flag to determine when the XUSB controller's DMA master is ready.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-4-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subsequent patches for system suspend/resume support will need to reload
the firmware on resume. Since the firmware remains in system memory, the
driver doesn't need to reload it from the filesystem. However, the XUSB
controller will be reset across suspend/resume, so it needs to load the
firmware into its microcontroller on resume.
Split the firmware request and the firmware load code into two separate
functions so that the driver can reuse the firmware in system memory to
reload the microcontroller on resume.
Based on work by JC Kuo <jckuo@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-3-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The tegra_xusb_mbox_regs structure was misspelled tega_xusb_mbox_regs.
Fortunately this was done consistently so it didn't cause any issues.
Reviewed-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-2-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
XUSB phy needs to be enabled before un-powergating the power partitions.
However in the current sequence, it happens opposite. Correct the phy
enable and powergating partition sequence to avoid any boot hangs.
Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Jui Chang Kuo <jckuo@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/1572859470-7823-1-git-send-email-nkristam@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit adds Tegra194 XUSB host mode controller support. This is
very similar to the existing Tegra124/Tegra210/Tegra186 XHCI, except
1. the number of ports and PHYs differs
2. the IPFS wrapper being removed
3. mailbox registers address changes
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Link: https://lore.kernel.org/r/20191004162906.4818-3-jckuo@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tegra194 XUSB host controller has rearranged mailbox registers. This
commit makes mailbox registers address a part of "soc" data so that
xhci-tegra driver can be used for Tegra194.
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Link: https://lore.kernel.org/r/20191004162906.4818-2-jckuo@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use the new regulator helper instead of a for loop.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191001132333.20146-4-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190904091004.3808-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
