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If the hub_configure() fails after setting the hdev->maxchild
the hub->ports might be NULL or point to uninitialized kzallocated
memory causing NULL pointer dereference in hub_quiesce() during cleanup.
Now after such error the hdev->maxchild is set to 0 to avoid cleanup
of uninitialized ports.
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Commit 7e8d5cd93fac ("USB: Add EHCI support for MX27 and MX31 based
boards") introduced code that could potentially lead to a NULL pointer
dereference on driver removal.
Fix this by checking for the value of pdata before dereferencing it.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org> # 2.6.33+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fix endianess bugs in parallel-port code which caused corrupt
control-requests to be issued on big-endian machines.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The write_parport_reg_nonblock() function shouldn't sleep because it's
called with spinlocks held.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The documentation for the USB gadget fs is actually in
Documentation/usb/gadget_configfs.txt.
Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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ra.kernel.org:/pub/scm/linux/kernel/git/sarah/xhci into work-next
Sarah writes:
xhci: Step 2 to fix usb-linus and usb-next.
Hi Greg,
This is the first of two steps to fix your usb-linus and usb-next trees.
As I mentioned, commit 4fae6f0fa86f92e6bc7429371b1e177ad0aaac66 "USB:
handle LPM errors during device suspend correctly" was incorrectly added
to usb-next when it should have been added to usb-linus and marked for
stable.
Two port power off bug fixes touch the same code that patch touches, but
it's not easy to simply move commit 4fae6f0f patch to usb-linus because
commit 28e861658e23ca94692f98e245d254c75c8088a7 "USB: refactor code for
enabling/disabling remote wakeup" also touched those code sections.
I propose a two step process to fix this:
1. Pull these four patches into usb-linus.
2. Revert commit 28e861658e23ca94692f98e245d254c75c8088a7 from usb-next.
Merge usb-linus into usb-next, and resolve the conflicts.
I will be sending pull requests for these steps.
This pull request is step two.
Sarah Sharp
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xhci: Step 1 to fix usb-linus and usb-next.
Hi Greg,
This is the first of three steps to fix your usb-linus and usb-next
trees. As I mentioned, commit 4fae6f0fa86f92e6bc7429371b1e177ad0aaac66
"USB: handle LPM errors during device suspend correctly" was incorrectly
added to usb-next when it should have been added to usb-linus and marked
for stable.
Two port power off bug fixes touch the same code that patch touches, but
it's not easy to simply move commit 4fae6f0f patch to usb-linus because
commit 28e861658e23ca94692f98e245d254c75c8088a7 "USB: refactor code for
enabling/disabling remote wakeup" also touched those code sections.
I propose a two step process to fix this:
1. Pull these four patches into usb-linus.
2. Revert commit 28e861658e23ca94692f98e245d254c75c8088a7 from usb-next.
Merge usb-linus into usb-next, and resolve the conflicts.
I will be sending pull requests for these steps.
This pull request is step one, and contains the backported version of
commit 4fae6f0fa86f92e6bc7429371b1e177ad0aaac66, the two port power off
fixes, and an unrelated xhci-plat bug fix.
Sarah Sharp
Resolved conflicts:
drivers/usb/core/hub.c
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The xHCI platform driver calls into usb_add_hcd to register the irq for
its platform device. It does not want the xHCI generic driver to
register an interrupt for it at all. The original code did that by
setting the XHCI_BROKEN_MSI quirk, which tells the xHCI driver to not
enable MSI or MSI-X for a PCI host.
Unfortunately, if CONFIG_PCI is enabled, and CONFIG_USB_DW3 is enabled,
the xHCI generic driver will attempt to register a legacy PCI interrupt
for the xHCI platform device in xhci_try_enable_msi(). This will result
in a bogus irq being registered, since the underlying device is a
platform_device, not a pci_device, and thus the pci_device->irq pointer
will be bogus.
Add a new quirk, XHCI_PLAT, so that the xHCI generic driver can
distinguish between a PCI device that can't handle MSI or MSI-X, and a
platform device that should not have its interrupts touched at all.
This quirk may be useful in the future, in case other corner cases like
this arise.
This patch should be backported to kernels as old as 3.9, that
contain the commit 00eed9c814cb8f281be6f0f5d8f45025dc0a97eb "USB: xhci:
correctly enable interrupts".
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Yu Y Wang <yu.y.wang@intel.com>
Tested-by: Yu Y Wang <yu.y.wang@intel.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Cc: stable@vger.kernel.org
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Userspace can tell the kernel to power off any USB port, including ones
that are visible and connectible to users. When an attached USB device
goes into suspend, the port will be powered off if the
pm_qos_no_port_poweroff file for its port is set to 0, the device does
not have remote wakeup enabled, and the device is marked as persistent.
If the user disconnects the USB device while the port is powered off,
the current code does not handle that properly. If you disconnect a
device, and then run `lsusb -v -s` for the device, the device disconnect
does not get handled by the USB core. The runtime resume of the port
fails, because hub_port_debounce_be_connected() returns -ETIMEDOUT.
This means the port resume fails and khubd doesn't handle the USB device
disconnect. This leaves the device listed in lsusb, and the port's
runtime_status will be permanently marked as "error".
Fix this by ignoring the return value of hub_port_debounce_be_connected.
Users can disconnect USB devices while the ports are powered off, and we
must be able to handle that.
This patch should be backported to kernels as old as 3.9, that
contain the commit ad493e5e580546e6c3024b76a41535476da1546a "usb: add
usb port auto power off mechanism"
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Lan Tianyu <tianyu.lan@intel.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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The pm qos NO_POWER_OFF flag is checked twice during usb device suspend
to see if the usb port power off condition is met. This is redundant and
also will prevent the port from being powered off if the NO_POWER_OFF
flag is changed to 1 from 0 after the device was already suspended.
More detail in the following link.
http://marc.info/?l=linux-usb&m=136543949130865&w=2
This patch should be backported to kernels as old as 3.7, that
contain the commit f7ac7787ad361e31a7972e2854ed8dc2eedfac3b "usb/acpi:
Use ACPI methods to power off ports."
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
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The hub driver's usb_port_suspend() routine doesn't handle errors
related to Link Power Management properly. It always returns failure,
it doesn't try to clean up the wakeup setting, (in the case of system
sleep) it doesn't try to go ahead with the port suspend regardless,
and it doesn't try to apply the new power-off mechanism.
This patch fixes these problems.
Note: Sarah fixed this patch to apply against 3.11, since the original
commit (4fae6f0fa86f92e6bc7429371b1e177ad0aaac66 "USB: handle LPM errors
during device suspend correctly") called usb_disable_remote_wakeup,
which won't be added until 3.12.
This patch should be backported to kernels as old as 3.5, that
contain the commit 8306095fd2c1100e8244c09bf560f97aca5a311d "USB:
Disable USB 3.0 LPM in critical sections.". There will be merge
conflicts, since LTM wasn't added until 3.6.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
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We want these USB fixes in this branch as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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usb-serial-simple uses an unknown stringify macro that make
all drivers being named "stringify(vendor)".
This can be a problem when two drivers have the same (wrong) name:
kernel: usbcore: registered new interface driver usb_serial_simple
kernel: usbserial: USB Serial support registered for stringify(vendor)
kernel Error: Driver 'stringify(vendor)' is already registered, aborting...
kernel: usbserial: problem -16 when registering driver stringify(vendor)
kernel: usbserial: USB Serial deregistering driver stringify(vendor)
kernel: usbcore: deregistering interface driver usb_serial_simple
Before the fix:
$ strings drivers/usb/serial/usb-serial-simple.o
usb_serial_simple
stringify(vendor)
After the fix:
$ strings drivers/usb/serial/usb-serial-simple.o
usb_serial_simple
funsoft
flashloader
vivopay
moto_modem
hp4x
suunto
siemens_mpi
This patch makes usb-serial-simple use the correct stringify operator.
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In wa_seg_init, use usb_init_urb to init the URB object contained in the
transfer segment instead of initializing it manually. Use kmalloc to
allocate the memory for segment instead of kzalloc and then use memset
to set the non-URB portion of the transfer segment struct to 0 since
that was already done by usb_init_urb.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The check to free the URB was the opposite of the correct case. This
patch removes the check altogether since the ptr will be NULL if the URB
was not allocated. Also use usb_free_urb instead of usb_put_urb.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Use usb_free_urb instead of kfree in error path and point to the correct
URB. Also remember to clean up the sg list for the URB if it was allocated.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When the HWA encounters a STALL on a control endpoint, it should clear the
RPIPE_STALL feature on the RPIPE before processing the next transfer
request. Otherwise, all transfer requests on that endpoint after the
first STALL will fail because the RPIPE is still in the halted state.
This also removes the unneccessary call to spin_lock_irqsave for a nested
lock that was present in the first patch.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci into usb-next
Sarah writes:
xhci: Platform updates, 64-bit DMA, and trace events for 3.12.
Hi Greg,
This pull request includes one new feature for the xhci-plat driver (device
tree support). Felipe was fine with the patch last I checked, but hadn't
provided an official Acked-by line.
This pull request also includes 13 patches from my FOSS Outreach Program for
Women (OPW) intern, Xenia. She fixed a bug in the xHCI driver so that the
driver can allocate 64-bit consistent DMA, converted the driver to use dynamic
debugging, and added a bunch of new trace events for the xHCI driver. The
python plugin for trace-cmd should be up on git hub shortly, although the trace
events are usable without it.
I'm very happy with the progress that Xenia has made, and I look forward to her
future contributions to the Linux kernel.
Sarah Sharp
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The function dma_set_mask() tests internally whether the dma_mask pointer
for the device is initialized and fails if the dma_mask pointer is NULL.
On pci platforms, the device dma_mask pointer is initialized, when pci
devices are enumerated, to point to the pci_dev->dma_mask which is 0xffffffff.
However, for non-pci platforms, the dma_mask pointer may not be initialized
and in that case dma_set_mask() will fail.
This patch initializes the dma_mask and the coherent_dma_mask to 32bits
in xhci_plat_probe(), before the call to usb_create_hcd() that sets the
"uses_dma" flag for the usb bus and the call to usb_add_hcd() that creates
coherent dma pools for the usb hcd.
Moreover, a call to dma_set_mask() does not set the device coherent_dma_mask.
Since the xhci-hcd driver calls dma_alloc_coherent() and dma_pool_alloc()
to allocate consistent DMA memory blocks, the coherent DMA address mask
has to be set explicitly.
This patch sets the coherent_dma_mask to 64bits in xhci_gen_setup() when
the xHC is capable for 64-bit DMA addressing.
If dma_set_mask() succeeds, for a given bitmask, it is guaranteed that
the given bitmask is also supported for consistent DMA mappings.
Other changes introduced in this patch are:
- The return value of dma_set_mask() is checked to ensure that the required
dma bitmask conforms with the host system's addressing capabilities.
- The dma_mask setup code for the non-primary hcd was removed since both
primary and non-primary hcd refer to the same generic device whose
dma_mask and coherent_dma_mask are already set during the setup of
the primary hcd.
- The code for reading the HCCPARAMS register to find out the addressing
capabilities of xHC was removed since its value is already cached in
xhci->hccparams.
- hcd->self.controller was replaced with the dev variable since it is
already available.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch defines a new trace event, which is called xhci_dbg_ring_expansion
and belongs to the event class xhci_log_msg, and adds tracepoints that trace
the debug messages associated with the expansion of endpoint ring when there
is not enough space allocated to hold all pending TRBs.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch defines a new trace event, which is called xhci_dbg_init
and belongs to the event class xhci_log_msg, and adds tracepoints that
trace the debug statements in the functions used to start and stop the
xhci-hcd driver.
Also, it removes an unnecessary cast of variable val to unsigned int
in xhci_mem_init(), since val is already declared as unsigned int.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch defines a new trace event, which is called xhci_dbg_cancel_urb
and belongs to the event class xhci_log_msg, and adds tracepoints that
trace the debug messages related to the removal of a cancelled URB from
the endpoint's transfer ring.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch creates a new event class, called xhci_log_event,
and defines the xhci_cmd_completion trace event used for
tracing the commands issued to xHC that generate a completion
event in the event ring.
This info can be used, later, to print, in a human readable
way, the completion status and flags as well as the command's
type and fields using the trace-cmd tool and the appropriate
plugin.
Also, a tracepoint is added in handle_cmd_completion().
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch defines a new event class, called xhci_log_ctx,
that records in the ring buffer the context data, the
context type (input or output), the context dma and virtual
addresses, the context endpoint entries, the slot ID and
whether the xHC uses 64 byte context data structures.
This information can be used, later, to parse and display
the context data fields with the appropriate plugin using
the trace-cmd tool.
Also, this patch defines a trace event, called xhci_address_ctx,
to trace the contexts related to the Address Device command and
adds the associated tracepoints in xhci_address_device().
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch defines a new trace event, which is called xhci_dbg_reset_ep
and belongs in the event class xhci_log_msg, and adds tracepoints that
trace the debug messages associated with resetting an endpoint after
the reception of a STALL packet.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch defines a new trace event, which is called xhci_dbg_quirks
and belongs in the event class xhci_log_msg, and adds tracepoints that
trace the debug messages associated with xHCs' quirks.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch defines a new trace event, which is called xhci_dbg_context_change
and belongs in the event class xhci_log_msg, and adds tracepoints for tracing
the debug messages related to context updates performed with Configure Endpoint
and Evaluate Context commands.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch declares an event class for trace events that
trace messages with variadic arguments, called xhci_log_msg,
and defines a trace event for tracing the debug messages in
xhci_address_device() function, called xhci_dbg_address.
In order to implement this type of trace events, a wrapper function,
called xhci_dbg_trace(), was created that records the format string
and variadic arguments into a va_format structure which is passed as
argument to the tracepoints of the class xhci_log_msg.
All the xhci_dbg() calls in xhci_address_device() are replaced
with calls to xhci_dbg_trace(). The functionality of xhci_dbg()
log messages was not removed though, but it is placed inside
xhci_dbg_trace().
This trace event aims to give the ability to the user or the
developper to isolate and trace the debug messages generated
when an Address Device Command is issued to xHC.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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CONFIG_USB_XHCI_HCD_DEBUGGING option is used to enable
verbose debugging output for the xHCI host controller
driver.
In the current version of the xhci-hcd driver, this
option must be turned on, in order for the debugging
log messages to be displayed, and users may need to
recompile the linux kernel to obtain debugging
information that will help them track down problems.
This patch removes the above debug option to enable
debugging log messages at all times.
The aim of this is to rely on the debugfs and the
dynamic debugging feature for fine-grained management
of debugging messages and to not force users to set
the debug config option and compile the linux kernel
in order to have access in that information.
This patch, also, removes the XHCI_DEBUG symbol and the
functions dma_to_stream_ring(), xhci_test_radix_tree()
and xhci_event_ring_work() that are not useful anymore.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch replaces the calls to printk(KERN_DEBUG ...)
with either calls to xhci_dbg() or calls to pr_debug(),
depending on whether the xhci_hcd structure is available
at callsite, so that the correspoding debugging messages
are not enabled by default when CONFIG_DYNAMIC_DEBUG option
is set but rather can be enabled dynamically taking advantage
of the dynamic debugging feature.
Also, it adds a newline at the end of debugging messages in
case there is not, so that messages don't appear broken
when printed.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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This patch replaces the calls to xhci_info() with calls to
xhci_dbg() and removes the unused xhci_info() definition
from xhci-hcd.
By replacing the xhci_info() with xhci_dbg(), the calls to
dev_info() are replaced with calls to dev_dbg() so that
their output can be dynamically controlled via the dynamic
debugging mechanism.
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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Add Device Tree match table to xhci-plat.c. Add DT bindings document.
Signed-off-by: Al Cooper <alcooperx@gmail.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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Make sure the USB control request is allocated separately from
containing structure to prevent potential memory corruption on
non-cache-coherent systems.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Make sure serial DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Make sure serial DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Make sure port DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Make sure serial DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The chipidea i.MX driver is split into two drivers. The ci_hdrc_imx driver
handles the chipidea cores and the usbmisc_imx driver handles the noncore
registers common to all chipidea cores (but SoC specific). Current flow is:
- usbmisc sets an ops pointer in the ci_hdrc_imx driver during probe
- ci_hdrc_imx checks if the pointer is valid during probe, if yes calls
the functions in the ops pointer.
- usbmisc_imx calls back into the ci_hdrc_imx driver to get additional
data
This is overly complicated and has problems if the drivers are compiled
as modules. In this case the usbmisc_imx driver can be unloaded even if
the ci_hdrc_imx driver still needs usbmisc functionality.
This patch changes this by letting the ci_hdrc_imx driver calling functions
from the usbmisc_imx driver. This way the symbol resolving during module
load makes sure the ci_hdrc_imx driver depends on the usbmisc_imx driver.
Also instead of letting the usbmisc_imx driver call back into the ci_hdrc_imx
driver, pass the needed data in the first place.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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For chipidea, the IP must know vbus before the controller
begins to run. So the .pullup should only be called when
the vbus is there.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently, the controller only runs when the ci->vbus_active is true.
So the flag CI_HDRC_PULLUP_ON_VBUS is useless no longer.
If the user doesn't have otgsc, he/she needs to change ci_handle_vbus_change
to update ci->vbus_active.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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CI_HDRC_REGS_SHARED stands for the controller registers is shared
with other USB drivers, if all USB drivers are at chipidea/, it doesn't
needed to be set.
CI_HDRC_PULLUP_ON_VBUS stands for pullup dp when the vbus is on. This
flag doesn't need to be set if the vbus is always on for gadget
since dp has always pulled up after the gadget has initialized.
So, the current code seems to misuse this two flags.
- When the gadget initializes, the controller doesn't need to run if
it depends on vbus (CI_HDRC_PULLUP_ON_VBUS), it does not relate to
shared register.
- When the gadget starts (load one gadget module), the controller
can run if vbus is on (CI_HDRC_PULLUP_ON_VBUS), it also does not
relate to shared register.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When the gadget role starts, we need to make sure the vbus is lower
than OTGSC_BSV, or there will be an vbus interrupt since we use
B_SESSION_VALID as vbus interrupt to indicate connect and disconnect.
When the host role starts, it may not be useful to wait vbus to lower
than OTGSC_BSV, but it can indicate some hardware problems like the
vbus is still higher than OTGSC_BSV after we disconnect to host some
time later (5000 milliseconds currently), which is obvious not correct.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We add vbus interrupt handler at ci_otg_work, it uses OTGSC_BSV(at otgsc)
to know it is connect or disconnet event.
Meanwhile, we introduce two flags id_event and b_sess_valid_event to
indicate it is an id interrupt or a vbus interrupt.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Move otg related things to otg file.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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During the initialization, it needs to disable all interrupts
enable bit as well as clear all interrupts status bits to avoid
exceptional interrupt.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Since we need otgsc to know vbus's status at some chipidea
controllers even it is peripheral-only mode. Besides, some
SoCs (eg, AR9331 SoC) don't have otgsc register even
the DCCPARAMS_DC and DCCPARAMS_HC are both 1 at CAP_DCCPARAMS.
We inroduce flag CI_HDRC_DUAL_ROLE_NOT_OTG to indicate if the
controller is dual role, but not supports OTG. If this flag is
not set, we follow the rule that if DCCPARAMS_DC and DCCPARAMS_HC
are both 1 at CAP_DCCPARAMS, then this controller is otg capable.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- The role's init will be called at probe procedure.
- The role's destroy will be called at fail patch
at probe and driver's removal.
- The role's start/stop will be called when specific
role has started.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This file is mainly used to access otgsc currently, it may
add otg related things in the future.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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It is useless at below cases:
- If we implement both usb host and device at chipidea driver.
- If we don't need phy->otg.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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For boards which have board level vbus control (eg, through gpio), we
need to vbus operation according to below rules:
- For host, we need open vbus before start hcd, and close it
after remove hcd.
- For otg, the vbus needs to be on/off when usb role switches.
When the host roles begins, it opens vbus; when the host role
finishes, it closes vbus.
We put vbus operation to host as host is the only vbus user,
When we are at host mode, the vbus is on, when we are not at
host mode, vbus should be off.
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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