There is a 200ms guard period to avoid unnecessary resets of the dwc2
ip. This delay sometimes prove to be too large when usbcv is run with
an ehci host. dwc2 only needs to be reset after addressed state.
Change the logic to reset ip after addressed state.
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Make sure there are no requests pending on ep0 before reinitializing
core. Otherwise, dwc2_hsotg_enqueue_setup will fail afterwards.
Also, take hsotg->lock before calling
dwc2_hsotg_core_init_disconnected() from dwc2_conn_id_status_change()
as dwc2_hsotg_complete_request() expect lock to be held.
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Correctly update lx_state on gadget connection and disconnection.
When usb cable is disconnected, lx_state must be updated to L3 as
controller could be in power off state.
When usb cable is connected, lx_state must be updated to L0 as
controller is powered.
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
On a disconnect, dwc2 will kill all remaining urbs from qh list.
urbs are given back to hcd with -ETIMEDOUT status.
Some usb device driver, like mass storage, will unlink all urbs
using usb_hcd_unlink_urb when receiving a negative status different
from -ECONNRESET.
The following flow will then happen:
dwc2_hcd_disconnect()
-> dwc2_kill_all_urbs() try to kill first pending urb.
-> dwc2_host_complete(-ETIMEDOUT)
-> usb_hcd_giveback_urb(-ETIMEDOUT)
-> sg_complete()
-> usb_unlink_urb()
-> usb_put_dev(urb->dev)
-> dwc2_kill_all_urbs() try to kill next pending urb.
-> dwc2_host_complete(-ETIMEDOUT)
-> usb_hcd_giveback_urb(-ETIMEDOUT)
-> NULL pointer dereferencing because urb->dev has been freed for all
urbs of this device.
The root cause of this NULL pointer is to call call usb_unlink_urb()
while we are killing all urbs. To avoid this return urb with
-ECONNRESET status
This issue usually happens while removing mass storage device during
transfer.
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Some high speed mass storage devices fail to enumerate with following
error:
Cannot enable port %i. Maybe the USB cable is bad?
This happens only when the device is plugged while the controller
is in hibernation state. After exiting hibernation, the controller
detects the device as a low speed device and fail to enumerate it.
Problem occurs only if HPRT0.PWR bit is programmed in a too short
delay after exiting hibernation. Dumping hprt register in
_dwc2_hcd_resume() directly after dwc2_exit_hibernation() shows that
HPRT0.LNSTS (D+/D- level) becomes valid approximately 2ms after
exiting hibernation.
Since dwc2_exit_hibernation() is called from atomic context, move the
delay out of this function.
Delay value is experimental and not mentioned in Synopsys
documentation. To be on the safe side 3ms delay is used.
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
If an interrupt rises during hibernation process, dwc2 will assert
interrupt line to interrupt controller. If interrupt is level
sensitive, interrupt handler will be called in a loop because dwc2
will not be able to clear it while controller is hibernated.
Thus, clear all controller interrupts before hibernation entry.
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Frame number is reset in hardware after exiting hibernation.
Thus, reset frame_number and ensure qh are queued with correct
sched_frame.
Otherwise, qh->sched_frame may be too high compared to
current frame number (which is 0). This can delay addition of qh in
the list of transfers until frame number reaches qh->sched_frame.
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Disable controller power and enter hibernation when usb bus is
suspended. A phy driver is required to disable the power of the
controller and detect remote-wakeup or disconnection since the
controller will not be able to detect these in this state.
Once the phy driver detects bus activity, it must call
usb_hcd_resume_root_hub.
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
port resume sequence may be used in different places. Create a
function to handle it. Make hprt0 read-modify-write atomic and
clear HPRT0_SUSP for both writes as it is a "read, write-set,
and self-clear (R_WS_SC)" bit. Since the lock is released
between the writes, read hprt0 again.
Since the phy clock is stopped in dwc2_port_suspend(), enable it
here and remove the PCGCTL write from dwc2_hcd_hub_control()
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
By using the unified device property interface, the function
can be made available for all platforms and not just the
ones using DT.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This patch switches calls to readl/writel to their
dwc2_readl/dwc2_writel equivalents which preserve platform endianness.
This patch is necessary to access dwc2 registers correctly on big-endian
systems such as the mips based SoCs made by Lantiq. Then dwc2 can be
used to replace ifx-hcd driver for Lantiq platforms found e.g. in
OpenWrt.
The patch was autogenerated with the following commands:
$EDITOR core.h
sed -i "s/\<readl\>/dwc2_readl/g" *.c hcd.h hw.h
sed -i "s/\<writel\>/dwc2_writel/g" *.c hcd.h hw.h
Some files were then hand-edited to fix checkpatch.pl warnings about
too long lines.
Signed-off-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
this driver has long ago became dwc2.ko with
both peripheral and host roles, there's no point
in keeping the old function names.
Acked-by: John Youn <johnyoun@synopsys.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Convert endpoint configuration to new capabilities model.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
It's just a lot clearer to use | operator instead of
+ operator.
Caught by coccicheck:
"
drivers/usb/dwc2/gadget.c:2883:26-27: WARNING: sum of probable
bitmasks, consider |
"
Cc: John Youn <John.Youn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Register backup function can be called from atomic context. Instead
of using atomic memory pool, embed backup storage space in
struct dwc2_hsotg.
Also add a valid flag in each struct as NULL pointer can't be used as
the content validity check any more.
Acked-by: John Youn <johnyoun@synopsys.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
To avoid sleep while atomic bugs, allocate qtd before calling
dwc2_hcd_urb_enqueue. No need to pass mem_flags to
dwc2_hcd_urb_enqueue any more as no memory allocations are done in it.
Acked-by: John Youn <johnyoun@synopsys.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
To avoid sleep while atomic bugs, allocate qh before calling
dwc2_hcd_urb_enqueue. qh pointer can be used directly now instead of
passing ep->hcpriv as double pointer.
Acked-by: John Youn <johnyoun@synopsys.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
commit db62b9a804 (usb: dwc2: host: don't
use dma_alloc_coherent with irqs disabled)
introduced a build warning by using NULL
as an integer. Fix that by just using 0 instead
of NULL.
Signed-off-by: Felipe Balbi <balbi@ti.com>
dwc2_hc_nak_intr could be called with a NULL qtd.
Ensure qtd exists before dereferencing it to avoid kernel panic.
This happens when using usb to ethernet adapter.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
dwc2 may not be able to exit from hibernation if the hardware
does not provide a way to detect resume signalling in this state.
Thus, add the possibility to disable hibernation feature.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
As dwc2 pci module is now exporting dwc2 platform device, include
platform.o in dwc2-y and remove USB_DWC2_PLATFORM configuration
option. Driver will be built as two modules, dwc2.ko and dwc2_pci.ko.
dwc2.ko is the new platform driver.
Remove all EXPORT_SYMBOL_GPL as they are not needed any more.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Align buffer must be allocated using kmalloc since irqs are disabled.
Coherency is handled through dma_map_single which can be used with irqs
disabled.
Reviewed-by: Julius Werner <jwerner@chromium.org>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
During urb_enqueue, if the urb can't be queued to the endpoint,
the urb is freed without any spinlock protection.
This leads to memory corruption when concurrent urb_dequeue try to free
same urb->hcpriv.
Thus, ensure the whole urb_enqueue in spinlocked.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Once hub is runtime suspended, dwc2 must resume it
on port connect event.
Else, roothub will stay in suspended state and will
not resume transfers.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
