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19128 Коммитов

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Jon Hunter ee9e5f4c78 usb: xhci: tegra: Add runtime PM support
Add runtime PM support to the Tegra XHCI driver and move the function
calls to enable/disable the clocks, regulators and PHY into the runtime
PM callbacks.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:23:02 +02:00
Jon Hunter f468b55cb7 usb: xhci: tegra: Prepare for adding runtime PM support
When adding runtime PM support to the Tegra XHCI driver, it is desirable
to move the function calls to enable the clocks, regulators and PHY from
the tegra_xusb_probe into the runtime PM handlers. Currently, the
clocks, regulators and PHY are all enabled before we call
usb_create_hcd() in tegra_xusb_probe(), however, we cannot call
pm_runtime_get_sync() at this point because the platform device data is
not yet initialised. Fortunately, the function usb_create_hcd() can be
called before we enable the clocks, regulators and PHY and so prepare
for adding runtime PM support, by moving the call to usb_create_hcd()
before we enable the hardware.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:23:02 +02:00
Alexander Kappner ca7d9515d0 usb-storage: Add compatibility quirk flags for G-Technologies G-Drive
The "G-Drive" (sold by G-Technology) external USB 3.0 drive
 hangs on write access under UAS and usb-storage:

[  136.079121] sd 15:0:0:0: [sdi] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  136.079144] sd 15:0:0:0: [sdi] tag#0 Sense Key : Illegal Request [current]
[  136.079152] sd 15:0:0:0: [sdi] tag#0 Add. Sense: Invalid field in cdb
[  136.079176] sd 15:0:0:0: [sdi] tag#0 CDB: Write(16) 8a 08 00 00 00 00 00 00 00 00 00 00 00 08 00 00
[  136.079180] print_req_error: critical target error, dev sdi, sector 0
[  136.079183] Buffer I/O error on dev sdi, logical block 0, lost sync page write
[  136.173148] EXT4-fs (sdi): mounted filesystem with ordered data mode. Opts: (null)
[  140.583998] sd 15:0:0:0: [sdi] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  140.584010] sd 15:0:0:0: [sdi] tag#0 Sense Key : Illegal Request [current]
[  140.584016] sd 15:0:0:0: [sdi] tag#0 Add. Sense: Invalid field in cdb
[  140.584022] sd 15:0:0:0: [sdi] tag#0 CDB: Write(16) 8a 08 00 00 00 00 e8 c4 00 18 00 00 00 08 00 00
[  140.584025] print_req_error: critical target error, dev sdi, sector 3905159192
[  140.584044] print_req_error: critical target error, dev sdi, sector 3905159192
[  140.584052] Aborting journal on device sdi-8.

The proposed patch adds compatibility quirks. Because the drive requires two
quirks (one to work with UAS, and another to work with usb-storage), adding this
under unusual_devs.h and not just unusual_uas.h so kernels compiled without UAS
receive the quirk. With the patch, the drive works reliably on UAS and usb-
storage.
(tested on NEC Corporation uPD720200 USB 3.0 host controller).

Signed-off-by: Alexander Kappner <agk@godking.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:19:39 +02:00
Alexander Kappner 8c4e97ddfe usb-storage: Add support for FL_ALWAYS_SYNC flag in the UAS driver
The ALWAYS_SYNC flag is currently honored by the usb-storage driver but not UAS
and is required to work around devices that become unstable upon being
queried for cache. This code is taken straight from:
drivers/usb/storage/scsiglue.c:284

Signed-off-by: Alexander Kappner <agk@godking.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:19:39 +02:00
Heikki Krogerus 05826ff135 usb: typec: wcove: Remove dependency on HW FSM
The USB Type-C PHY in Intel WhiskeyCove PMIC has build-in
USB Type-C state machine which we were relying on to
configure the CC lines correctly. This patch removes that
dependency and configures the CC line according to commands
from the port manager (tcpm.c) in wcove_set_cc().

This fixes an issue where USB devices attached to the USB
Type-C port do not get enumerated. When acting as
source/host, the HW FSM sometimes fails to configure the PHY
correctly.

Fixes: 3c4fb9f169 ("usb: typec: wcove: start using tcpm for USB PD support")
Cc: stable@vger.kernel.org
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:17:00 +02:00
Heikki Krogerus cb29684686 usb: roles: intel_xhci: Enable runtime PM
This fixes an issue where the mux does not get configured
when the parent device is suspended. The registers for this
mux are mapped to the parent device MMIO (usually xHCI PCI
device), so in order for the driver to be able to program
the registers, the parent device must be resumed.

Reported-by: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com>
Fixes: f6fb9ec02b ("usb: roles: Add Intel xHCI USB role switch driver")
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:17:00 +02:00
Heikki Krogerus c9359f4162 usb: typec: fusb302: Fix debugfs issue
Removing the "fusb302" debugfs directory when unloading
the driver. That allows the driver to be loaded more then
one time. The directory will not get actually removed until
it is empty, so only after the last instance has been
removed.

This fixes an issue where the driver can't be re-loaded if
it has been unloaded as the "fusb302" debugfs directory
already exists.

Fixes: 76f0c53d08 ("usb: typec: fusb302: Move out of staging")
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:17:00 +02:00
Heikki Krogerus 35fcf02f80 usb: roles: intel_xhci: Always allow user control
Trying to determine the USB port type with this mux is very
difficult. To simplify the situation, always allow user
control, even if the port is USB Type-C port.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:17:00 +02:00
Heikki Krogerus 74789aed88 usb: typec: Fix htmldocs warning
Fix htmldocs warning:

drivers/usb/typec/mux.c:186: warning: Function parameter or member 'mux' not described in
'typec_mux_unregister'

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: bdecb33af3 ("usb: typec: API for controlling USB Type-C Multiplexers")
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:14:28 +02:00
Gustavo A. R. Silva a0d6ec8809 usbip: vhci_sysfs: fix potential Spectre v1
pdev_nr and rhport can be controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.

This issue was detected with the help of Smatch:
drivers/usb/usbip/vhci_sysfs.c:238 detach_store() warn: potential spectre issue 'vhcis'
drivers/usb/usbip/vhci_sysfs.c:328 attach_store() warn: potential spectre issue 'vhcis'
drivers/usb/usbip/vhci_sysfs.c:338 attach_store() warn: potential spectre issue 'vhci->vhci_hcd_ss->vdev'
drivers/usb/usbip/vhci_sysfs.c:340 attach_store() warn: potential spectre issue 'vhci->vhci_hcd_hs->vdev'

Fix this by sanitizing pdev_nr and rhport before using them to index
vhcis and vhci->vhci_hcd_ss->vdev respectively.

Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].

[1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2

Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:14:28 +02:00
Yoshihiro Shimoda 4a014a7339 usb: gadget: function: printer: avoid wrong list handling in printer_write()
When printer_write() calls usb_ep_queue(), a udc driver (e.g.
renesas_usbhs driver) may call usb_gadget_giveback_request() in
the udc .queue ops immediately. Then, printer_write() calls
list_add(&req->list, &dev->tx_reqs_active) wrongly. After that,
if we do unbind the printer driver, WARN_ON() happens in
printer_func_unbind() because the list entry is not removed.

So, this patch moves list_add(&req->list, &dev->tx_reqs_active)
calling before usb_ep_queue().

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:14:28 +02:00
Adam Thomson c97a8cc17f typec: tcpm: Provide fwnode pointer as part of psy_cfg
For supply registration, provide fwnode pointer of the port device,
via the power_supply_config structure, to allow other psy drivers
to add us as a supplier. At present this only applies to DT
based platforms using the 'power-supplies' DT property, but in the
future should also work for ACPI platforms when the relevant support
is added to the power_supply core.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Suggested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:14:27 +02:00
Chunfeng Yun 681e948524 usb: mtu3: fix warning of sleep in atomic context in notifier callback
The notifier callbacks of extcon are called in atomic context, but the
callbacks will call regulator_enable()/regulator_disable() which may
sleep caused by mutex, so use work queue to call the sleep functions.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:09:37 +02:00
Chunfeng Yun 4f9f032c25 usb: mtu3: reset gadget when VBUS_FALL interrupt arises
When VBUS_FALL interrupt arises, it means U3 device is disconnected
with host, so need reset status of gadget

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:09:37 +02:00
Chunfeng Yun 3d7678e2a0 usb: mtu3: avoid sleep in atomic context when enter test mode
Use readl_poll_timeout_atomic() instead of readl_poll_timeout()
in atomic context

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:09:37 +02:00
Chunfeng Yun fbe9db75b4 usb: mtu3: clear test_mode flag when reset
Clear test_mode flag when the gadget is reset by host, otherwise
will affect the next test item.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:09:37 +02:00
Chunfeng Yun 5fcdd6de18 usb: mtu3: fix uncontinuous SeqN issue after disable EP
Reset EP when disable it to reset data toggle for U2 EP, and
SeqN, flow control status etc for U3 EP, this can avoid
issue of uncontinuous SeqN

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:09:37 +02:00
Chunfeng Yun ad0c542cd2 usb: mtu3: re-enable controller to accept LPM request after LPM resume
After the controller receives a LPM request, it will reject the LPM
request, and need software to re-enable it after LPM resume if the
controller doesn't remote wakeup from L1 automatically

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:09:36 +02:00
Mathias Nyman 87a0380218 xhci: debugfs: add debugfs interface to enable compliance mode for a port
Enable compliance transition for a port by writing "compliance" to the
ports portsc file in debugfs.
port must be "Not-connected" and Link must be in RxDetect state to enable
compliance mode.

Only needed for host that have CTC flag set.
Allows state transitioning to compliance at 1st LFPS timeout.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:09 +02:00
Mathias Nyman 6547502392 xhci: debugfs: add usb ports to xhci debugfs
Add ports/portxx/portsc for each xHC hardware usb port to debugfs.
Showing the content of the port status and control register for
each port (PORTSC)

Portxx is numbered starting from 1 for historical reasons to better
match port numbering shown by lsusb and other places.

Ports in debugfs are in the order XHC controller has them,
In most cases USB2 ports come first, followed by USB3 ports.
i.e. USB2 ports are port01-portxx, and USB3 portxx-portmax.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:09 +02:00
Mathias Nyman 07f7619053 xhci: xhci-mem: remove port_arrays and the code initializing them
As we are now using the new port strtuctes the port_arrays
are no longer needed, remove them completely

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:09 +02:00
Mathias Nyman edaa30f878 xhci-mtk: use xhci hub structures to get number of ports in roothubs
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman 925f349d4d xhci: xhci-hub: use port structure members instead of xhci_get_ports()
xhci_get_ports() is one of the last functions using port_arrays in
xhci-hub.c. We get the same data directly from hub and port structures
instead, so convert and remove both xhci_get_ports() and port_arrays from
all function that no longer need it.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman 38986ffa6a xhci: use port structures instead of port arrays in xhci.c functions
get rid of port iomem arrays and use port structures in the following
functions:
xhci_find_raw_port_number()
xhci_disable_port_wake_on_bits()
xhci_set_usb2_hardware_lpm()
xhci_all_ports_seen_u0()
compliance_mode_recovery()

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman eaefcf246b xhci: change xhci_test_and_clear_bit() to use new port structure
Don't use pointers to port array and port index as function parameters
in xhci_test_and_clear_bit(), just use a pointer to the right port
structure.

xhci_test_and_clear_bit() was the last port_array user in
xhci_get_port_status() and handle_port_status(), so remove the
port_array from them as well.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman 6b7f40f712 xhci: change xhci_set_link_state() to work with port structures
Remove old iomem port array and index as parameters, just
send a ponter to a port strucure instread

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman 74e6ad583a xhci: rename faked_port_index to hcd_portnum
hcd_portnum is a better desctiption than faked_port_index, and
is in line with the name the port structure uses.

No functional changes

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman 52c7755ba1 xhci: xhci-ring: use port structures for port event handler
use port structures in the port event handler.
Getting the right hcd and hcd portnumber from the hardware port number
is a lot easier with port structures, and allows us to remove a lot
of the previous code, including the find_faked_portnum_from_hw_index()
function

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman fdcf74ffef xhci: xhci-hub: use new port structures for cas and wake mask functions.
Use port structures instead of mmio port arrays for
xhci_port_missing_cas_quirk() and xhci_set_remote_wake_mask() in
xhci-hub.c

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman e740b019d7 xhci: xhci-hub: use new port structures to get port address instead of port array
Use the new port structures for functions in xhci-hub.c to get
port mmio address of portsc register instead of the port array

xhci_get_port_io_addr() is no longer needeed and is removed.
Plan is to get rid of the mmio port array completely.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman ffd4b4fc0b xhci: Add helper to get xhci roothub from hcd
quick way to get the xhci roothub and thus all the ports
belonging to a certain hcd

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman 9ea95ecc7f xhci: set hcd pointers for xhci usb2 and usb3 roothub structures
Allows us to know the correct hcd a xhci roothub and its ports
belong to.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:08 +02:00
Mathias Nyman bcaa9d5c59 xhci: Create new structures to store xhci port information
Current way of having one array telling only the port speed,
and then two separate arrays with mmio addresses for usb2 and usb3 ports
requeres helper functions to transate  hw to hcd, and hcd to hw port
numbers, and is hard to expand.

Instead create a structure describing a port, including the mmio address,
the port hardware index, hcd port index, and a pointer to the roothub
it belongs to.

Create one array containing all port structures in the same order the
hardware controller sees them. Then add an array of port pointers to
each xhci hub structure pointing to the ports that belonging to the
roothub.

This way we can easily convert hw indexed port events to usb core
hcd port numbers, and vice versa usb core hub hcd port numbers
to hw index and mmio address.

Other benefit is that we can easily find the parent hcd and xhci
structure of a port structure. This is useful in debugfs where
we can give one port structure pointer as parameter and get both
the correct mmio address and xhci lock needed to set some port
parameter.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:07 +02:00
Jianguo Sun c508f41da0 xhci: hisilicon: support HiSilicon STB xHCI host controller
This commit adds support for HiSilicon STB xHCI host controller.
There are two xHCI host controllers on HiSilicon STB SoCs. Each
one requires additional configuration before exposing interface
compliant with xHCI.

Reviewed-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:07 +02:00
Lu Baolu 4786d2ef45 usb: xhci: dbc: Add SPDX identifiers to dbc files
Update the xhci dbc files with the correct SPDX license identifiers.

Fixes: dfba2174dc ("usb: xhci: Add DbC support in xHCI driver")
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Philippe Ombredanne <pombredanne@nexB.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-24 18:03:07 +02:00
Greg Kroah-Hartman 109e37a673 usb: changes for v4.18 merge window
A total of 98 non-merge commits, the biggest part being in dwc3 this
 time around with a large refactoring of dwc3's transfer handling code.
 
 We also have a new driver for Aspeed virtual hub controller.
 
 Apart from that, just a list of miscellaneous fixes all over the place.
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Merge tag 'usb-for-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

usb: changes for v4.18 merge window

A total of 98 non-merge commits, the biggest part being in dwc3 this
time around with a large refactoring of dwc3's transfer handling code.

We also have a new driver for Aspeed virtual hub controller.

Apart from that, just a list of miscellaneous fixes all over the place.
2018-05-24 17:46:53 +02:00
Bin Liu ddf12f04dc usb: musb: gadget: fix to_musb_ep() to not return NULL
UDC core ensures the usb_ep parameter passed in is not NULL, so
checking if (ep != NULL) is pointless.

Convert to_musb_ep() to a simple macro to not directly return NULL to
avoid warnings from code static analysis tools.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Bin Liu 8dca510718 usb: musb: gadget: fix to_musb_request() to not return NULL
The gadget function drivers should ensure the usb_request parameter
passed in is not NULL. UDC core doesn't check if it is NULL, so MUSB
driver shouldn't have to check it either.

Convert to_musb_request() to a simple macro to not directly return NULL
to avoid warnings from code static analysis tools.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Johan Hovold 49484abd93 USB: musb: dsps: propagate device-tree node
To be able to use DSPS-based controllers with device-tree descriptions
of the USB topology, we need to associate the glue device's device-tree
node with the child controller device.

Note that this can also be used to eventually let USB core manage
generic phys.

Also note that the other glue drivers will require similar changes to be
able to describe their buses in DT.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Bin Liu 0a9134bd73 usb: musb: disable otg protocol support
As decided in the discussion [1] we are deleting the otg protocol
support from the musb drivers.

First this patch disables the flags for enabling the otg protocols. We
will later gradually delete the otg protocol code from the musb drivers.

[1] https://www.spinics.net/lists/linux-usb/msg167003.html

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Bin Liu d2852f2d3e usb: musb: remove references to default_a of struct usb_otg
musb drivers do not use the otg fsm framework, so referencing to
otg->default_a doesn't have any effect, so remove the references.

But tusb6010 glue driver uses it locally to control the vbus power, so
keep the references in tusb6010 only.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Bin Liu bcb8fd3a2f usb: musb: break the huge isr musb_stage0_irq() into small functions
musb_stage0_irq() is 400+ lines long. Break its interrupt events
handling into each individual functions to make it easy to read.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Bin Liu 2bc2e05f92 usb: musb: remove unused members in struct musb_hdrc_config
The following members in struct musb_hdrc_config are not used,
so remove them.

soft_con
utm_16
big_endian
mult_bulk_tx
mult_bulk_rx
high_iso_tx
high_iso_rx
dma
dma_channels
dyn_fifo_size
vendor_ctrl
vendor_stat
vendor_req
dma_req_chan
musb_hdrc_eps_bits

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Bin Liu 7ad76955c6 usb: musb: remove duplicated port mode enum
include/linux/usb/musb.h already defines enum for musb port mode, so
remove the duplicate in musb_core.h and use the definition in musb.h.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Bin Liu 55479956f3 usb: musb: dsps: remove duplicated get_musb_port_mode()
musb_core already has musb_get_mode(), so remove the duplicate from
musb_dsps.c.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:24 +02:00
Bin Liu dc8fca6c68 usb: musb: remove duplicated quirks flag
Both musb_io and musb_platform_ops in struct musb define a quirks flag
for the same purpose.  Let's remove the one in struct musb_io, and use
that in struct musb_platform_ops instead.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:24 +02:00
Bin Liu 113ad151cf usb: musb: remove some register access wrapper functions
The following wrappers were defined because of Blackfin support. Now
Blackfin support is removed, these wrappers are no longer needed, so
remove them.

	musb_write_txfifosz
	musb_write_txfifoadd
	musb_write_rxfifosz
	musb_write_rxfifoadd
	musb_write_ulpi_buscontrol
	musb_read_txfifosz
	musb_read_txfifoadd
	musb_read_rxfifosz
	musb_read_rxfifoadd
	musb_read_ulpi_buscontrol
	musb_read_hwvers

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:24 +02:00
Bin Liu 53e1657a1c usb: musb: remove adjust_channel_params() callback from musb_platform_ops
Now Blackfin support is removed, nobody uses adjust_channel_params() any
more, so remove it from struct musb_platform_ops.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:24 +02:00
Bin Liu 42e990ea80 usb: musb: remove readl/writel from struct musb_platform_ops
Now Blackfin support is removed, we no longer need function pointers for
musb_readl() and musb_writel().

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:24 +02:00
Bin Liu 78fba982db usb: musb: merge musbhsdma.h into musbhsdma.c
Now Blackfin support is removed, header musbhsdma.h is only included in
musbhsdma.c. So let's merge the content in musbhsdma.h to musbhsdma.c
and delete musbhsdma.h.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:24 +02:00
Florian Zumbiehl 7041d9c3f0 USB: serial: pl2303: add support for tx xon/xoff flow control
Support hardware-level Xon/Xoff flow control in transmit direction with
pl2303.

I only know how to get the hardware to do IXON/!IXANY with ^S/^Q as control
characters, so I preserve the old behaviour for all other cases.

Signed-off-by: Florian Zumbiehl <florz@florz.de>
[ johan: rewrite logic using pl2303_termios_change() helper ]
Signed-off-by: Johan Hovold <johan@kernel.org>
2018-05-22 10:08:05 +02:00
Johan Hovold df1cd63d6d USB: serial: ftdi_sio: clean up flow control management
Clean up the somewhat convoluted hardware-assisted flow control
handling.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
2018-05-21 10:04:30 +02:00
Johan Hovold 1641011549 USB: serial: ftdi_sio: drop unnecessary urb_ variable prefixes
Drop urb_ prefixes from value and index variables used in control
requests.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
2018-05-21 10:04:26 +02:00
Johan Hovold fd54a99aec USB: serial: ftdi_sio: use non-underscore fixed types
Replace all __u types with their u counterparts throughout the driver
(whose structures are not exported to user space).

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
2018-05-21 10:04:20 +02:00
Johan Hovold 5ada98427f USB: serial: ftdi_sio: fix IXON/IXOFF mixup
Since forever this driver has had IXON and IXOFF mixed up, and has used
the latter rather than the former to enable hardware-assisted software
flow control on output.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
2018-05-21 10:03:49 +02:00
Grigor Tovmasyan 47265c067c usb: dwc2: gadget: Fix coverity issue
When _param is unsigned and the minimum value of range is 0, it gives
the following warning:
COVERITY NO_EFFECT: This less-than-zero comparison of an unsigned value
is never true.

Converting ._param to int to avoid this warning.

Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:40:16 +03:00
Yoshihiro Shimoda 8223b2f89c usb: gadget: udc: renesas_usb3: fix double phy_put()
This patch fixes an issue that this driver cause double phy_put()
calling. This driver must not call phy_put() in the remove because
the driver calls devm_phy_get() in the probe.

Fixes: 279d4bc640 ("usb: gadget: udc: renesas_usb3: add support for generic phy")
Cc: <stable@vger.kernel.org> # v4.15+
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>
2018-05-21 10:38:09 +03:00
Yoshihiro Shimoda bd6bce004d usb: gadget: udc: renesas_usb3: disable the controller's irqs for reconnecting
This patch fixes an issue that reconnection is possible to fail
because unexpected state handling happens by the irqs. To fix the issue,
the driver disables the controller's irqs when disconnected.

Fixes: 746bfe63bb ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
Cc: <stable@vger.kernel.org> # v4.5+
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>
2018-05-21 10:36:14 +03:00
Yoshihiro Shimoda 0259068f63 usb: gadget: udc: renesas_usb3: should fail if devm_phy_get() returns error
This patch fixes an issue that this driver ignores errors other than
the non-existence of the device, f.e. a memory allocation failure
in devm_phy_get(). So, this patch replaces devm_phy_get() with
devm_phy_optional_get().

Reported-by: Simon Horman <horms+renesas@verge.net.au>
Fixes: 279d4bc640 ("usb: gadget: udc: renesas_usb3: add support for generic phy")
Cc: <stable@vger.kernel.org> # v4.15+
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>
2018-05-21 10:36:14 +03:00
Yoshihiro Shimoda 003bc1dee2 usb: gadget: udc: renesas_usb3: should call devm_phy_get() before add udc
This patch fixes an issue that this driver cannot call phy_init()
if a gadget driver is alreadly loaded because usb_add_gadget_udc()
might call renesas_usb3_start() via .udc_start.
This patch also revises the typo (s/an optional/optional/).

Fixes: 279d4bc640 ("usb: gadget: udc: renesas_usb3: add support for generic phy")
Cc: <stable@vger.kernel.org> # v4.15+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Yoshihiro Shimoda d998844016 usb: gadget: udc: renesas_usb3: should call pm_runtime_enable() before add udc
This patch fixes an issue that this driver causes panic if a gadget
driver is already loaded because usb_add_gadget_udc() might call
renesas_usb3_start() via .udc_start, and then pm_runtime_get_sync()
in renesas_usb3_start() doesn't work correctly.
Note that the usb3_to_dev() macro should not be called at this timing
because the macro uses the gadget structure.

Fixes: cf06df3fae ("usb: gadget: udc: renesas_usb3: move pm_runtime_{en,dis}able()")
Cc: <stable@vger.kernel.org> # v4.15+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Yoshihiro Shimoda 1990cf7c21 usb: gadget: udc: renesas_usb3: should remove debugfs
This patch fixes an issue that this driver doesn't remove its debugfs.

Fixes: 43ba968b00 ("usb: gadget: udc: renesas_usb3: add debugfs to set the b-device mode")
Cc: <stable@vger.kernel.org> # v4.14+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Mayank Rana 05645366f3 usb: dwc3: gadget: Fix list_del corruption in dwc3_ep_dequeue
dwc3_ep_dequeue() waits for completion of End Transfer command using
wait_event_lock_irq(), which will release the dwc3->lock while waiting
and reacquire after completion. This allows a potential race condition
with ep_disable() which also removes all requests from started_list
and pending_list.

The check for NULL r->trb should catch this but currently it exits to
the wrong 'out1' label which calls dwc3_gadget_giveback(). Since its
list entry was already removed, if CONFIG_DEBUG_LIST is enabled a
'list_del corruption' bug is thrown since its next/prev pointers are
already LIST_POISON1/2. If r->trb is NULL it should simply exit to
'out0'.

Fixes: cf3113d893 ("usb: dwc3: gadget: properly increment dequeue pointer on ep_dequeue")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Wei Yongjun 691025107e usb: dwc3: gadget: dwc3_gadget_del_and_unmap_request() can be static
Fixes the following sparse warning:

drivers/usb/dwc3/gadget.c:169:6: warning:
 symbol 'dwc3_gadget_del_and_unmap_request' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Wei Yongjun fe70dce97c usb: dwc2: pci: Fix error return code in dwc2_pci_probe()
Fix to return error code -ENOMEM from the alloc fail error handling
case instead of 0, as done elsewhere in this function.

Fixes: ecd29dabb2 ("usb: dwc2: pci: Handle error cleanup in probe")
Reviewed-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Artur Petrosyan 5295322a06 usb: dwc2: WA for Full speed ISOC IN in DDMA mode.
By clearing NAK status of EP, core will send ZLP
to IN token and assert NAK interrupt relying
on TxFIFO status only.

The WA applies only to core versions from 2.72a
to 4.00a (including both). Also for FS_IOT_1.00a
and HS_IOT_1.00a.

Signed-off-by: Artur Petrosyan <arturp@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Tomeu Vizoso a7ef207424 usb: dwc2: dwc2_vbus_supply_init: fix error check
devm_regulator_get_optional returns -ENODEV if the regulator isn't
there, so if that's the case we have to make sure not to leave -ENODEV
in the regulator pointer.

Also, make sure we return 0 in that case, but correctly propagate any
other errors. Also propagate the error from _dwc2_hcd_start.

Fixes: 531ef5ebea ("usb: dwc2: add support for host mode external vbus supply")
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Reviewed-by: Amelie Delaunay <amelie.delaunay@st.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
Luc Van Oostenryck 43a6dc9421 usb: gadget: f_phonet: fix pn_net_xmit()'s return type
The method ndo_start_xmit() is defined as returning an 'netdev_tx_t',
which is a typedef for an enum type, but the implementation in this
driver returns an 'int'.

Fix this by returning 'netdev_tx_t' in this driver too.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:36:14 +03:00
John Stultz d98c624ab3 usb: dwc2: Fix HiKey regression caused by power_down feature
In 4.17-rc, commit 03ea6d6e9e ("usb: dwc2: Enable power down")
caused the HiKey board to not correctly handle switching between
usb-gadget and usb-host mode.

Unplugging the OTG port would result in:
[   42.240973] dwc2 f72c0000.usb: dwc2_restore_host_registers: no host registers to restore
[   42.249066] dwc2 f72c0000.usb: dwc2_host_exit_hibernation: failed to restore host registers

And the USB-host ports would not function.

And plugging in the OTG port, we would see:
[   46.046557] WARNING: CPU: 3 PID: 6 at drivers/usb/dwc2/gadget.c:260 dwc2_hsotg_init_fifo+0x194/0x1a0
[   46.055761] CPU: 3 PID: 6 Comm: kworker/u16:0 Not tainted 4.17.0-rc5-00030-ge67da8c #231
[   46.055767] Hardware name: HiKey Development Board (DT)
[   46.055784] Workqueue: dwc2 dwc2_conn_id_status_change
...

Thus, this patch sets the hisi params to disable the power_down
flag by default, and gets thing working again.

Cc: John Youn <johnyoun@synopsys.com>
Cc: Vardan Mikayelyan <mvardan@synopsys.com>
Cc: Artur Petrosyan <arturp@synopsys.com>
Cc: Grigor Tovmasyan <tovmasya@synopsys.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: linux-usb@vger.kernel.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:35:46 +03:00
Grigor Tovmasyan 6fb914d788 usb: dwc2: Fix kernel doc's warnings.
Added descriptions for all not described parameters.
Fix all kernel doc's warnings.

Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:02:13 +03:00
Nikhil Badola 431d93c205 usb: gadget: fsl: Introduce FSL_USB2_PHY_UTMI_DUAL for usb gadget
Introduce FSL_USB2_PHY_UTMI_DUAL in gadget driver for setting
phy in SOCs with utmi dual phy

Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Tested-by: Tiago Brusamarello <tbrusa@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:01:02 +03:00
kbuild test robot edbbfe1944 usb: dwc3: dwc3_get_extcon() can be static
Fix sparse warning

Fixes: 5f0b74e548 ("USB: dwc3: get extcon device by OF graph bindings")
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:01:01 +03:00
Felipe Balbi 31a2f5a7e1 usb: dwc3: gadget: init req->{direction,epnum} from alloc_request()
We dont' need to touch req->direction or req->epnum from
ep_queue(). It's enough that we initialize both fields from
alloc_request() and just keep them for the entire lifetime of the
request.

No functional changes.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:01:01 +03:00
Felipe Balbi d7ca7e1896 usb: dwc3: gadget: initialize transfer index from send_gadget_ep_cmd()
Instead of *always* calling dwc3_gadget_ep_get_transfer_index() after
sending a Start Transfer command, we can call it once from
dwc3_send_gadget_ep_cmd() itself.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:01:01 +03:00
Felipe Balbi 4439661d64 usb: dwc3: gadget: assign resource_index inside get_transfer_index()
Instead of returning resource index number just to assign it to a
field inside 'dep' which was passed as argument, we can assing
dep->resource_index from inside dwc3_gadget_ep_get_transfer_index()
itself.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:01:00 +03:00
Felipe Balbi f62afb4929 usb: dwc3: gadget: always start isochronous aligned to dep->interval
We will *always* start transfer to the next uFrame number aligned to
dep->interval.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:01:00 +03:00
Felipe Balbi d513320f1f usb: dwc3: gadget: don't issue End Transfer if we have started reqs
In case we have many started requests and one of them in the middle is
completed with Missed Isoc, let's not End Transfer as that would
result in us loosing (possibly) many more intervals.

Instead, let's allow the controller to go through its list of started
requests.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:01:00 +03:00
Felipe Balbi e1d542f712 usb: dwc3: debug: decode uFrame from event too
XferNotReady and XferInProgress give us the uFrame number we're
currently in. Printing that out on tracepoints may help us find bugs
in transfer scheduling.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:59 +03:00
Felipe Balbi 42626919ef usb: dwc3: gadget: move dwc3_calc_trbs_left() in place of prototype
Avoid a prototype when the function can be defined earlier. No
functional changes, cleanup only.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:59 +03:00
Felipe Balbi 20d1d43fa0 usb: dwc3: gadget: move set_xfer_resource() in place of prototype
Instead of having a prototype for a function that's defined a few
lines down, let's just move definition to the place where prototype
was.

No functional changes, cleanup only.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:59 +03:00
Felipe Balbi b07c2db83f usb: dwc3: gadget: remove a few more dwc arguments
In a few places, the argument is completely unnecessary. On places
where it's needed, we can get it from dep->dwc.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:58 +03:00
Felipe Balbi a2d23f0803 usb: dwc3: gadget: combine modify & restore into single argument
Those two arguments refer to a single bitfield in the register. In
order to simplify the code, we can combine them into a single argument
and expect caller to pass the correct action argument at all times.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:58 +03:00
Felipe Balbi 8f1c99cd24 usb: dwc3: gadget: refactor dwc3_gadget_init_endpoints()
This just makes it slightly easier to read. No functional changes.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:58 +03:00
Felipe Balbi f38e35dd84 usb: dwc3: gadget: split dwc3_gadget_ep_cleanup_completed_requests()
No functional changes, it just makes the code slightly easier to read.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:57 +03:00
Felipe Balbi 6d9d22dac1 usb: dwc3: gadget: get rid of the length variable
Code is just as readable without it.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:57 +03:00
Felipe Balbi fee73e6144 usb: dwc3: gadget: reduce scope of ret variable
We can declare it inside list_for_each_entry_safe() loop and reduce
its scope.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:57 +03:00
Felipe Balbi 6afbdb5773 usb: dwc3: gadget: one declaration per line
Misc cleanup. No functional changes.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:56 +03:00
Felipe Balbi e0c42ce590 usb: dwc3: gadget: simplify IOC handling
We will only have event status of IOC when IOC bit is set in
TRB. There's no need to check both bits.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:56 +03:00
Felipe Balbi d80fe1b6e3 usb: dwc3: gadget: simplify short packet event
We know that only OUT endpoints can trigger SHORT. We also know that
count MUST be > 0 whenever SHORT triggers.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:56 +03:00
Felipe Balbi b27972b508 usb: dwc3: trace: print out event status too
This will make it easier to figure out the reason for the event. That
information really helps debugging certain problems.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:56 +03:00
Felipe Balbi 8b3b7b66c0 usb: dwc3: gadget: simplify unaligned and zlp handling
We can just call reclaim_trb_linear instead of reimplementing it.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:55 +03:00
Felipe Balbi cf35fc336e usb: dwc3: gadget: remove unnecessary 'chain' variable
Minor cleanup, no functional changes.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:55 +03:00
Felipe Balbi 021595963a usb: dwc3: gadget: remove PENDING handling from cleanup_completed
We are trying to kick transfers on Isochronous endpoints in a more
controlled manner now. And this ended up rendering this piece of code
unnecessary.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:55 +03:00
Felipe Balbi d36929538f usb: dwc3: gadget: split scatterlist and linear handlers
instead of having one big loop, let's split it down into two smaller
handlers: one for linear buffers and one for scatterlist.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:54 +03:00
Felipe Balbi d5044a04b5 usb: dwc3: gadget: simplify isoc case on cleanup_completed_requests
Just a minor simplification, no functional changes.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:54 +03:00
Felipe Balbi fe990cea8e usb: dwc3: gadget: simplify queueing of isoc transfers
After all the previous changes, it's now a lot clearer how isoc
transfers should be managed. We don't need to try to End Transfers
from ep_queue since that's already done by cleanup_requests.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:54 +03:00
Felipe Balbi 4d588a145b usb: dwc3: gadget: remove duplicated missed isoc handling
Now, this part of the code is duplicated and brings no extra value to
the driver. Let's remove it.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:53 +03:00
Felipe Balbi 6d8a019614 usb: dwc3: gadget: check for Missed Isoc from event status
In case we get an event with status set to Missed Isoc, this means we
have missed an isochronous interval and should issue End Transfer
command and wait for the following XferNotReady.

Let's do that early, rather than late.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:53 +03:00
Felipe Balbi 58f0218a27 usb: dwc3: gadget: remove unnecessary 'ioc' variable
It's only written to, never read. We can remove it now.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:53 +03:00
Felipe Balbi 12a3a4ada8 usb: dwc3: gadget: make cleanup_completed_requests() return nothing
We don't need to return a value anymore here. Let's remove it.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2018-05-21 10:00:52 +03:00