Commit Graph

82 Commits

Author SHA1 Message Date
Sebastian Andrzej Siewior 27a4663397 usb: gadget: f_acm: use usb_gstrings_attach()
Use usb_gstrings_attach() to assign strings in f_acm to assign strings
ids.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-21 20:52:48 +02:00
Sebastian Andrzej Siewior 9bb2859f8a usb: gadget: composite: introduce usb_gstrings_attach()
The USB strings don't (yet) fully work in multiple configs/gadget
environment. The string id is assigned to the descriptor and the struct
usb_strings. We create a copy of the individual descriptor so we don't
clash if we use a function more than once. However, we have only one
struct usb_string for each string.

Currently each function which is used multiple times checks for
"id != 0" and only assigns string ids if it did not happen yet. This
works well if we use the same function multiple times as long as we do
it within the "one" gadget we have. Trouble starts once we use the same
function in a second gadget.

In order to solve this I introduce usb_gstrings_attach(). This function will
crate a copy all structs except for the strings which are not copied.
After the copy it will assign USB ids and attach it to cdev.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-21 20:52:48 +02:00
Sebastian Andrzej Siewior 2d5a889902 usb: gadget: export composite's setup & disconnect function
The configfs can't use all of composite's hooks because ->bind() and
->unbind() has to be done a little differently. ->disconnect() and
->setup() on the hand can be recycled.
This patch exports them both so configfs can use them.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-21 20:52:47 +02:00
Sebastian Andrzej Siewior a59233407a usb: gadget: factor out two helper functions from composite_bind()
This patch factors out two helper functions from composite_bind()
that is composite_dev_prepare() and its counterpart
composite_dev_cleanup().

This will be used by the configfs which requries a slightly different
bind/setup code because part of its configurations (i.e. config
descripts, cdev, …) are setup in advance and VID/PID and so one should
not be overwritten. Also the setup of ep0 endpoint can be delayed until
the UDC is assigned.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-21 20:52:47 +02:00
Sebastian Andrzej Siewior b473577854 usb: gadget: composite: add usb_remove_function()
This will be used to remove a single function from a given config. Right
now "ignore" that an error at ->bind() time and cleanup later during
composite_unbind() / remove_config().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-21 20:52:42 +02:00
Sebastian Andrzej Siewior de53c25447 usb: gadget: add some infracture to register/unregister functions
This patch provides an infrastructure to register & unregister a USB
function. This allows to turn a function into a module and avoid the
'#include "f_.*.c"' magic and we get a clear API / cut between the bare
gadget and its functions.
The concept is simple:
Each function defines the DECLARE_USB_FUNCTION_INIT macro whith an unique
name of the function and two allocation functions.
- one to create an "instance". The instance holds the current configuration
  set. In case there are two usb_configudations with one function there will
  be one instance and two usb_functions
- one to create an "function" from the instance.

The name of the instance is used to automaticaly load the module if it the
instance is not yet available.
The usb_function callbacks are slightly modified and extended:
- usb_get_function()
  creates a struct usb_function inclunding all pointers (bind,
  unbind,…). It uses the "instance" to map its configuration. So we can
  have _two_ struct usb_function, one for each usb_configuration.
- ->unbind()
  Since the struct usb_function was not allocated in ->bind() it should
  not kfree()d here. This function should only reverse what happens in
  ->bind() that is request cleanup and the cleanup of allocated
  descriptors.
- ->free_func()
  a simple kfree() of the struct usb_function

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-21 20:52:40 +02:00
Sebastian Andrzej Siewior 779d516ca9 usb: gadget: composite: don't call driver's unbind() if bind() failed
Lets assume nokia_bind() starts with "return -EINVAL". After loading the
gadget we end up with:

|udc dummy_udc.0: registering UDC driver [g_nokia]
|BUG: unable to handle kernel NULL pointer dereference at 00000040
|IP: [<c11f9555>] __list_add+0x25/0xf0
|Call Trace:
| [<c12d4e21>] rollback_registered+0x21/0x40
| [<c12d513f>] unregister_netdevice_queue+0x4f/0xa0
| [<c12d5259>] unregister_netdev+0x19/0x30
| [<f81335b2>] gphonet_cleanup+0x32/0x50 [g_nokia]
| [<f8133f1c>] nokia_unbind+0x1c/0x2a [g_nokia]
| [<f802509f>] __composite_unbind.constprop.10+0x4f/0xb0 [libcomposite]
| [<f80255be>] composite_bind+0x1ae/0x230 [libcomposite]
| [<c129e576>] usb_gadget_probe_driver+0xc6/0x1b0
| [<f8024aba>] usb_composite_probe+0x7a/0xa0 [libcomposite]

That is crash from nokia_unbind() invoked via nokia_bind(). This crash
will look different we if make it until usb_string_ids_tab() before we
enter an error condition in the probe function.
nokia_bind_config() tries to clean up which is IMHO the right thing to
do. Leaving things as-is and hoping that its unbind() will clean it up
is kinda backwards. Especially since the bind function never succeeded so
it can't know how much it needs to clean up.
This fixes the behaviour by not calling the driver's unbind function if
its bind function failed.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-21 20:52:37 +02:00
Sebastian Andrzej Siewior 8f900a9a6e usb: gadget: consider link speed for bMaxPower
The USB 2.0 specification says that bMaxPower is the maximum power
consumption expressed in 2 mA units and the USB 3.0 specification says
that it is expressed in 8 mA units.

This patch renames bMaxPower to MaxPower and the various /2 and *2 are
removed. Before reporting the config descriptor, the proper value is
computer based on the speed, all in-tree users are updated. MaxPower is
also increased to u16 so we can store the nokia gadget value which is
larger than the max value allowed for u8.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-01-10 12:38:52 +02:00
Sebastian Andrzej Siewior 10287baec7 usb: gadget: always update HS/SS descriptors and create a copy of them
HS and SS descriptors are staticaly created. They are updated during the
bind process with the endpoint address, string id or interface numbers.

After that, the descriptor chain is linked to struct usb_function which
is used by composite in order to serve the GET_DESCRIPTOR requests,
number of available configs and so on.

There is no need to assign the HS descriptor only if the UDC supports
HS speed because composite won't report those to the host if HS support
has not been reached. The same reasoning is valid for SS.

This patch makes sure each function updates HS/SS descriptors
unconditionally and uses the newly introduced helper function to create a
copy the descriptors for the speed which is supported by the UDC.

While at that, also rename f->descriptors to f->fs_descriptors in order
to make it more explicit what that means.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-10-31 15:09:44 +02:00
Sebastian Andrzej Siewior ed9cbda63d usb: gadget: remove usb_gadget_controller_number()
The bcdDevice field is defined as
|Device release number in binary-coded decimal
in the USB 2.0 specification. We use this field to distinguish the UDCs
from each other. In theory this could be used on the host side to apply
certain quirks if the "special" UDC in combination with this gadget is
used. This hasn't been done as far as I am aware. In practice it would
be better to fix the UDC driver before shipping since a later release
might not need this quirk anymore.

There are some driver in tree (on the host side) which use the bcdDevice
field to figure out special workarounds for a given firmware revision.
This seems to make sense. Therefore this patch converts all gadgets
(except a few) to use the kernel version instead a random 2 or 3 plus
the UDC number. The few that don't report kernel's version are:
- webcam
  This one reports always a version 0x10 so allow it to do so in future.
- nokia
  This one reports always 0x211. The comment says that this gadget works
  only if the UDC supports altsettings so I added a check for this.
- serial
  This one reports 0x2400 + UDC number. Since the gadget version is 2.4
  this could make sense. Therefore bcdDevice is 0x2400 here.

I also remove various gadget_is_<name> macros which are unused. The
remaining few macros should be moved to feature / bug bitfield.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:43:24 +03:00
Sebastian Andrzej Siewior d80c304bca usb: gadget: libcomposite: move MODULE_VERSION to composite.c
MODULE_VERSION and AUTHOR looks better in composite.c than in
usbstrings.c so I move it there.
I put David Brownell as the module Author as I belive he wrote most of
it.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:13:03 +03:00
Sebastian Andrzej Siewior 721e2e9194 usb: gadget: libcomposite: move composite.c into libcomposite
This moves composite.c into libcomposite and updates all gadgets.
Finally!

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:13:03 +03:00
Sebastian Andrzej Siewior cc2683c318 usb: gadget: Provide a default implementation of default manufacturer string
Some gadgets provide custom entry here. Some may override it with an
etntry that is also created by composite if there was no value sumbitted
at all.
This patch removes all "custom manufacturer" strings which are the same
as these which are created by composite. Then it moves the creation of
the default manufacturer string to usb_composite_overwrite_options() in
case no command line argument has been used and the entry is still an
empty string.
By doing this we get rid of the global variable "composite_manufacturer"
in composite.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:13:02 +03:00
Sebastian Andrzej Siewior d33f74fce3 usb: gadget: remove string override from struct usb_composite_driver
The struct usb_composite_driver members iProduct, iSerial and
iManufacturer can be entered directly via the string array. There is no
need for them to appear here.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:13:02 +03:00
Sebastian Andrzej Siewior 2d35ee47aa usb: gadget: push iProduct into gadgets
This patch pushes the iProduct module argument from composite
into each gadget.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:13:01 +03:00
Sebastian Andrzej Siewior 03de9bf69c usb: gadget: push iManufacturer into gadgets
This patch pushes the iManufacturer module argument from composite into
each gadget. Once the user uses the module paramter, the string is
overwritten with the final value.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:13:01 +03:00
Sebastian Andrzej Siewior 1cf0d26408 usb: gadget: push iSerialNumber into gadgets
This patch pushes the iSerialNumber module argument from composite into
each gadget. Once the user uses the module paramter, the string is
overwritten with the final value.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:13:00 +03:00
Sebastian Andrzej Siewior 7d16e8d3eb usb: gadget: push VID/PID/USB BCD module option into gadgets
This patch moves the module options idVendor, idProduct and bcdDevice
from composite.c into each gadgets. This ensures compatibility with
current gadgets and removes the global variable which brings me step
closer towards composite.c in libcomposite

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:12:59 +03:00
Sebastian Andrzej Siewior 72258493ec usb: gadget: make composite module options readonly only
This is a partly revert of 4fffd6e5 ("usb: gadget: composite: make
module parameters accessible at runtime").
It is not possible to change the VID or other property for a gadget
right now. This change has been made for Anrdoid gadget which has this
functionality in its copy of the file. This function is executed currently
only once and most caller in tree are __init.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:06:34 +03:00
Sebastian Andrzej Siewior 40bfef0535 usb: gadget: remove bufsiz from struct usb_composite_dev
there is no read user of bufsiz, its content is available via
USB_COMP_EP0_BUFSIZ. Remove it.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:01:43 +03:00
Sebastian Andrzej Siewior e13f17ff88 usb: gadget: move USB_BUFSIZ into global composite.h
This patch moves USB_BUFSIZ into global header file as
USB_COMP_EP0_BUFSIZ. There is currently only one user (f_sourcesink)
besides composite which need it. Ideally f_sourcesink would have its
own ep0 buffer. Lets keep it that way it was for now.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 16:00:01 +03:00
Sebastian Andrzej Siewior ffe0b33506 usb: gadget: remove global variable composite in composite.c
This patch removes the global variable composite in composite.c.
The private data which was saved there is now passed via an additional
argument to the bind() function in struct usb_gadget_driver.

Only the "old-style" UDC drivers have to be touched here, new style are
doing it right because this change is made in udc-core.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 15:35:41 +03:00
Sebastian Andrzej Siewior 93952956c7 usb: gadget: move bind() callback back to struct usb_gadget_driver
This partly reverts 07a18bd7 ("usb gadget: don't save bind callback in
struct usb_composite_driver") and fixes new drivers. The section missmatch
problems was solved by whitelisting bind callback in modpost.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 15:35:16 +03:00
Sebastian Andrzej Siewior 03e42bd593 usb: gadget: move bind() callback back to struct usb_composite_driver
This partly reverts 07a18bd7 ("usb gadget: don't save bind callback in
struct usb_composite_driver") and fixes new drivers. The section missmatch
problems was solved by whitelisting structs in question via __ref.

Cc: devel@driverdev.osuosl.org
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 15:34:48 +03:00
Sebastian Andrzej Siewior fac3a43e0a usb: gadget: move bind callback into driver struct usb_composite_driver
It was moved to be an argument in 07a18bd716 ("usb gadget: don't
save bind callback in struct usb_composite_driver"). The reason was to
avoid the section missmatch. The warning was shown because ->bind is
marked as __init becuase it is a one time init. The warning can be also
suppresed by whitelisting the variable i.e. rename it to lets say _probe.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-09-10 15:32:58 +03:00
Michal Nazarewicz 85b8614d72 usb: gadget: get rid of USB_GADGET_{DUAL,SUPER}SPEED
This commit removes USB_GADGET_DUALSPEED and USB_GADGET_SUPERSPEED
Kconfig options.  Since now kernel allows many UDC drivers to be
compiled, those options may turn to no longer be valid.  For
instance, if someone decides to build UDC that supports super
speed and UDC that supports high speed only, the latter will be
"assumed" to support super speed since USB_GADGET_SUPERSPEED will
be selected by the former.

The test of whether CONFIG_USB_GADGET_*SPEED was defined was just
an optimisation which removed otherwise dead code (ie. if UDC is
not dual speed, there is no need to handle cases that can happen
if speed is high).  This commit removes those checks.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-08-31 12:49:40 +03:00
Michael Grzeschik 4fefe9f6de usb composite: fix locking in usb_function_activate
The lockdep hunter mentions a non consistent usage of spin_lock and
spin_lock_irqsafe in the composite_disconnect and usb_function_activate
function:

[   15.700897] =================================
[   15.705255] [ INFO: inconsistent lock state ]
[   15.709617] 3.5.0-rc5+ #413 Not tainted
[   15.713453] ---------------------------------
[   15.717812] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
[   15.723822] uvc-gadget/116 [HC1[1]:SC0[0]:HE0:SE1] takes:
[   15.729222]  (&(&cdev->lock)->rlock){?.+...}, at: [<7f0049e8>] composite_disconnect+0x2c/0x74 [g_webcam]
[   15.738797] {HARDIRQ-ON-W} state was registered at:
[   15.743677]   [<8006de3c>] mark_lock+0x148/0x688
[   15.748325]   [<8006ecb0>] __lock_acquire+0x934/0x1b74
[   15.753481]   [<8007047c>] lock_acquire+0x98/0x138
[   15.758288]   [<804c776c>] _raw_spin_lock+0x4c/0x84
[   15.763188]   [<7f006ae4>] usb_function_activate+0x28/0x94 [g_webcam]
[   15.769652]   [<7f00820c>] usb_ep_autoconfig_reset+0x78/0x98 [g_webcam]
[   15.776287]   [<7f0082a4>] uvc_v4l2_open+0x78/0x94 [g_webcam]
[   15.782054]   [<80366a38>] v4l2_open+0x104/0x130
[   15.786697]   [<800efd30>] chrdev_open+0xa0/0x170
[   15.791423]   [<800e9718>] do_dentry_open.isra.13+0x1e8/0x264
[   15.797186]   [<800ea5d4>] nameidata_to_filp+0x58/0x94
[   15.802340]   [<800fa29c>] do_last.isra.31+0x2a0/0x808
[   15.807497]   [<800faa40>] path_openat+0xc8/0x3e8
[   15.812216]   [<800fae90>] do_filp_open+0x3c/0x90
[   15.816936]   [<800ea6fc>] do_sys_open+0xec/0x184
[   15.821655]   [<800ea7c4>] sys_open+0x30/0x34
[   15.826027]   [<8000e5c0>] ret_fast_syscall+0x0/0x48
[   15.831015] irq event stamp: 6048
[   15.834330] hardirqs last  enabled at (6047): [<804c81b8>] _raw_spin_unlock_irqrestore+0x40/0x54
[   15.843132] hardirqs last disabled at (6048): [<8000e174>] __irq_svc+0x34/0x60
[   15.850370] softirqs last  enabled at (5940): [<80028380>] __do_softirq+0x188/0x270
[   15.858043] softirqs last disabled at (5935): [<80028944>] irq_exit+0xa0/0xa8
[   15.865195]
[   15.865195] other info that might help us debug this:
[   15.871724]  Possible unsafe locking scenario:
[   15.871724]
[   15.877645]        CPU0
[   15.880091]        ----
[   15.882537]   lock(&(&cdev->lock)->rlock);
[   15.886659]   <Interrupt>
[   15.889278]     lock(&(&cdev->lock)->rlock);
[   15.893573]
[   15.893573]  *** DEADLOCK ***
[   15.893573]
[   15.899496] no locks held by uvc-gadget/116.
[   15.903765]
[   15.903765] stack backtrace:
[   15.908125] Backtrace:
[   15.910604] [<80012038>] (dump_backtrace+0x0/0x114) from [<804bf8a4>] (dump_stack+0x20/0x24)
[   15.919043]  r6:dfb8e6f0 r5:dfb8e400 r4:809717ec r3:60000193
[   15.924766] [<804bf884>] (dump_stack+0x0/0x24) from [<804c0c0c>] (print_usage_bug+0x258/0x2c0)
[   15.933388] [<804c09b4>] (print_usage_bug+0x0/0x2c0) from [<8006e240>] (mark_lock+0x54c/0x688)
[   15.942006] [<8006dcf4>] (mark_lock+0x0/0x688) from [<8006edb8>] (__lock_acquire+0xa3c/0x1b74)
[   15.950625] [<8006e37c>] (__lock_acquire+0x0/0x1b74) from [<8007047c>] (lock_acquire+0x98/0x138)
[   15.959418] [<800703e4>] (lock_acquire+0x0/0x138) from [<804c78fc>] (_raw_spin_lock_irqsave+0x58/0x94)
[   15.968736] [<804c78a4>] (_raw_spin_lock_irqsave+0x0/0x94) from [<7f0049e8>] (composite_disconnect+0x2c/0x74 [g_webcam])
[   15.979605]  r7:00000012 r6:df82b0c4 r5:ded755bc r4:ded75580
[   15.985331] [<7f0049bc>] (composite_disconnect+0x0/0x74 [g_webcam]) from [<8033c170>] (_gadget_stop_activity+0xc4/0x120)
[   15.996200]  r6:df82b0c4 r5:df82b0c8 r4:df82b0d0 r3:7f0049bc
[   16.001919] [<8033c0ac>] (_gadget_stop_activity+0x0/0x120) from [<8033e390>] (udc_irq+0x724/0xcb8)
[   16.010877]  r6:df82b010 r5:00000000 r4:df82b010 r3:00000000
[   16.016595] [<8033dc6c>] (udc_irq+0x0/0xcb8) from [<8033baec>] (ci_irq+0x64/0xdc)
[   16.024086] [<8033ba88>] (ci_irq+0x0/0xdc) from [<80086538>] (handle_irq_event_percpu+0x74/0x298)
[   16.032958]  r5:807fd414 r4:df38fdc0
[   16.036566] [<800864c4>] (handle_irq_event_percpu+0x0/0x298) from [<800867a8>] (handle_irq_event+0x4c/0x6c)
[   16.046315] [<8008675c>] (handle_irq_event+0x0/0x6c) from [<80089318>] (handle_level_irq+0xbc/0x11c)
[   16.055447]  r6:def04000 r5:807fd414 r4:807fd3c0 r3:00020000
[   16.061166] [<8008925c>] (handle_level_irq+0x0/0x11c) from [<80085cc8>] (generic_handle_irq+0x38/0x4c)
[   16.070472]  r5:807f7f64 r4:8081e9f8
[   16.074082] [<80085c90>] (generic_handle_irq+0x0/0x4c) from [<8000ef98>] (handle_IRQ+0x5c/0xbc)
[   16.082788] [<8000ef3c>] (handle_IRQ+0x0/0xbc) from [<800085cc>] (tzic_handle_irq+0x6c/0x9c)
[   16.091225]  r8:00000000 r7:def059b0 r6:00000001 r5:00000000 r4:00000000
r3:00000012
[   16.099141] [<80008560>] (tzic_handle_irq+0x0/0x9c) from [<8000e184>] (__irq_svc+0x44/0x60)
[   16.107494] Exception stack(0xdef059b0 to 0xdef059f8)
[   16.112550] 59a0:                                     00000001 00000001 00000000 dfb8e400
[   16.120732] 59c0: 40000013 81a2e500 00000000 81a2e500 00000000 00000000 80862418 def05a0c
[   16.128912] 59e0: def059c8 def059f8 80070e24 804c81bc 20000013 ffffffff
[   16.135542] [<804c8178>] (_raw_spin_unlock_irqrestore+0x0/0x54) from [<8003d0ec>] (__queue_work+0x108/0x470)
[   16.145369]  r5:dfb1a30c r4:81b93c00
[   16.148978] [<8003cfe4>] (__queue_work+0x0/0x470) from [<8003d4e0>] (queue_work_on+0x4c/0x54)
[   16.157511] [<8003d494>] (queue_work_on+0x0/0x54) from [<8003d544>] (queue_work+0x30/0x34)
[   16.165774]  r6:df2e6900 r5:80e0c2f8 r4:dfb1a2c8 r3:def04000
[   16.171495] [<8003d514>] (queue_work+0x0/0x34) from [<80493284>] (rpc_make_runnable+0x9c/0xac)
[   16.180113] [<804931e8>] (rpc_make_runnable+0x0/0xac) from [<80493c88>] (rpc_execute+0x40/0xa8)
[   16.188811]  r5:def05ad4 r4:dfb1a2c8
[   16.192426] [<80493c48>] (rpc_execute+0x0/0xa8) from [<8048c734>] (rpc_run_task+0xa8/0xb4)
[   16.200690]  r8:00000001 r7:df74f520 r6:ded75700 r5:def05ad4 r4:dfb1a2c8
r3:00000002
[   16.208618] [<8048c68c>] (rpc_run_task+0x0/0xb4) from [<801f1608>] (nfs_initiate_read+0xb4/0xd4)
[   16.217403]  r5:df3e86c0 r4:00000000
[   16.221015] [<801f1554>] (nfs_initiate_read+0x0/0xd4) from [<801f1c64>] (nfs_generic_pg_readpages+0x9c/0x114)
[   16.230937] [<801f1bc8>] (nfs_generic_pg_readpages+0x0/0x114) from [<801f0744>] (__nfs_pageio_add_request+0xe8/0x214)
[   16.241545]  r8:000bf000 r7:00000000 r6:00000000 r5:deef4640 r4:def05c1c
r3:801f1bc8
[   16.249463] [<801f065c>] (__nfs_pageio_add_request+0x0/0x214) from [<801f0e3c>] (nfs_pageio_add_request+0x28/0x54)
[   16.259818] [<801f0e14>] (nfs_pageio_add_request+0x0/0x54) from [<801f1394>] (readpage_async_filler+0x114/0x170)
[   16.269992]  r5:def05c58 r4:80fd7300
[   16.273607] [<801f1280>] (readpage_async_filler+0x0/0x170) from [<800bb418>] (read_cache_pages+0xa0/0x108)
[   16.283259]  r8:00200200 r7:00100100 r6:df74f654 r5:def05cd0 r4:80fd7300
[   16.290034] [<800bb378>] (read_cache_pages+0x0/0x108) from [<801f218c>] (nfs_readpages+0xc4/0x168)
[   16.298999] [<801f20c8>] (nfs_readpages+0x0/0x168) from [<800bb1d0>] (__do_page_cache_readahead+0x254/0x354)
[   16.308833] [<800baf7c>] (__do_page_cache_readahead+0x0/0x354) from [<800bb5d0>] (ra_submit+0x38/0x40)
[   16.318145] [<800bb598>] (ra_submit+0x0/0x40) from [<800bb6b0>] (ondemand_readahead+0xd8/0x3b0)
[   16.326851] [<800bb5d8>] (ondemand_readahead+0x0/0x3b0) from [<800bba20>] (page_cache_async_readahead+0x98/0xa8)
[   16.337043] [<800bb988>] (page_cache_async_readahead+0x0/0xa8) from [<800b2118>] (generic_file_aio_read+0x5b4/0x7c4)
[   16.347565]  r6:00000000 r5:df74f654 r4:80fd70a0
[   16.352231] [<800b1b64>] (generic_file_aio_read+0x0/0x7c4) from [<801e82c0>] (nfs_file_read+0x7c/0xcc)
[   16.361544] [<801e8244>] (nfs_file_read+0x0/0xcc) from [<800eab80>] (do_sync_read+0xb4/0xf4)
[   16.369981]  r9:00000000 r8:def05f70 r7:00000000 r6:00000000 r5:dec34900
r4:fffffdee
[   16.377896] [<800eaacc>] (do_sync_read+0x0/0xf4) from [<800eb548>] (vfs_read+0xb4/0x144)
[   16.385987]  r8:00000000 r7:def05f70 r6:76a95008 r5:003e3dd6 r4:dec34900
[   16.392761] [<800eb494>] (vfs_read+0x0/0x144) from [<800eb624>] (sys_read+0x4c/0x78)
[   16.400504]  r8:00000000 r7:00000003 r6:003e3dd6 r5:76a95008 r4:dec34900
[   16.407279] [<800eb5d8>] (sys_read+0x0/0x78) from [<8000e5c0>] (ret_fast_syscall+0x0/0x48)
[   16.415543]  r9:def04000 r8:8000e864 r6:000086b4 r5:00000000 r4:00000000
[   20.872729]  gadget: high-speed config #1: Video
[   20.877368]  gadget: uvc_function_set_alt(0, 0)
[   20.881908]  gadget: uvc_function_set_alt(1, 0)
[   20.891464]  gadget: uvc_function_set_alt(1, 0)

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-08-23 11:04:17 +03:00
Felipe Balbi b785ea7ce6 usb: gadget: composite: fix ep->maxburst initialization
bMaxBurst field on endpoint companion descriptor
is supposed to contain the number of burst minus
1. When passing that to controller drivers, we
should be passing the real number instead (by
incrementing 1).

While doing that, also fix the assumption on
dwc3 that value comes decremented by one.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-06-12 13:30:25 +03:00
Andrzej Pietrasiewicz cad4cd8fbd usb: gadget: composite: add iSerialNumber to usb_composite_driver
Add iSerialNumber to usb_composite_driver to allow setting a default value.
This is useful when the module is compiled-in. Then the composite_bind
is executed at kernel boot and string id for iSerialNumber can be overridden
even if there is no iSerialNumber kernel commandline parameter.
If the string id is not overridden, then get_string will never attempt to
look for the alternative string contents using cdev->serial_override.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-10 12:22:43 -07:00
Andrzej Pietrasiewicz 4fffd6e5a2 usb: gadget: composite: make module parameters accessible at runtime
Enable module parameters to be modified at runtime, especially
if the module is compiled-in.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-10 12:22:43 -07:00
Benoit Goby 02e8161e34 usb: gadget: composite: Initialize config->interface
Reset config->interface in usb_add_config, as it may contain pointers to
functions from a previous session if config is removed and re-added.

Signed-off-by: Benoit Goby <benoit@android.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-10 12:21:32 -07:00
Benoit Goby 51cce6fc15 usb: gadget: composite: Add usb_remove_config
Add usb_remove_config to unbind a configuration and remove it from
the configs list. This allows implementing composite gadget drivers that
can disconnect themself from the bus and that will later be re-enumerated
with a different configuration.

Gadget drivers must call usb_gadget_disconnect before calling this
function to disable the pullup, disconnect the device from the host,
and prevent the host from enumerating the device while we are changing
the gadget configuration.

Signed-off-by: Benoit Goby <benoit@android.com>
	[change return type of [usb_]remove_config]
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-10 12:21:32 -07:00
Dan Carpenter 20c5e74c7b usb: gadget: add a sparse endian notation
The original code works fine, but Sparse complains because it isn't
annotated properly.

drivers/usb/gadget/composite.c:793:26: warning: incorrect type in assignment (different base types)
drivers/usb/gadget/composite.c:793:26:    expected unsigned short [unsigned] [usertype] language
devel/drivers/usb/gadget/composite.c:793:26:    got restricted __le16 [usertype] <noident>
devel/drivers/usb/gadget/composite.c:795:29: warning: restricted __le16 degrades to integer
drivers/usb/gadget/composite.c:798:24: warning: incorrect type in assignment (different base types)
drivers/usb/gadget/composite.c:798:24:    expected restricted __le16 [usertype] <noident>
devel/drivers/usb/gadget/composite.c:798:24:    got unsigned short [unsigned] [usertype] language

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-05-04 15:53:08 +03:00
Yongsul Oh 124ef38925 usb: gadget: composite: prevent a memory leak when configuration bind fails
In some USB composite gadget drivers, the configuration's bind function called
by the usb_add_config() calls multiple bind config functions. (for example cdc2
configuration bind function in the cdc_do_config() of the cdc2.c has two
functionality bind config functions.
  - the ecm_bind_config() & the acm_bind_config())

In each functionality bind config function, new instance is allocated and
finally added by the usb_add_function().

So if an error occurred during the second functionality bind config (for
example an error occurred at the acm_bind_config() after succeeding of the
ecm_bind_function()), the instance created by the acm_bind_config() cannot be
freed creating a memory leak.

This patch fixes this issue.

Signed-off-by: Yongsul Oh <yongsul96.oh@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-05-04 15:53:06 +03:00
Paul Zimmerman 9e878a6bfa usb: gadget: SS Isoc endpoints use comp_desc->bMaxBurst too
SuperSpeed Isoc endpoints also use the bMaxBurst value from the
companion descriptor. See section 9.6.7 in the USB 3.0 spec.

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-01-24 15:42:57 +02:00
Michal Nazarewicz 7177aed44f usb: gadget: rename usb_gadget_driver::speed to max_speed
This commit renames the “speed” field of the usb_gadget_driver
structure to “max_speed”.  This is so that to make it more
apparent that the field represents the maximum speed gadget
driver can support.

This also make the field look more like fields with the same
name in usb_gadget and usb_composite_driver structures.  All
of those represent the *maximal* speed given entity supports.

After this commit, there are the following fields in various
structures:
* usb_gadget::speed - the current connection speed,
* usb_gadget::max_speed - maximal speed UDC supports,
* usb_gadget_driver::max_speed - maximal speed gadget driver
  supports, and
* usb_composite_driver::max_speed - maximal speed composite
  gadget supports.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:45:12 +02:00
Paul Gortmaker 6eb0de8270 usb: Add module.h to drivers/usb consumers who really use it.
The situation up to this point meant that module.h was pretty
much everywhere, regardless of whether you asked for it or not.
We are fixing that, so give the USB folks who want it an actual
include of it.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:31:25 -04:00
Felipe Balbi 089b837a39 usb: gadget: fix typo for default U1/U2 exit latencies
s/DEFULT/DEFAULT/, no functional changes.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-10-13 20:39:59 +03:00
Michal Nazarewicz e538dfdae8 usb: Provide usb_speed_string() function
In a few places in the kernel, the code prints
a human-readable USB device speed (eg. "high speed").
This involves a switch statement sometimes wrapped
around in ({ ... }) block leading to code repetition.

To mitigate this issue, this commit introduces
usb_speed_string() function, which returns
a human-readable name of provided speed.

It also changes a few places switch was used to use
this new function.  This changes a bit the way the
speed is printed in few instances at the same time
standardising it.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-09-18 01:29:04 -07:00
Klaus Schwarzkopf 28c9fc68eb usb gadget: clean up FSF boilerplate text
remove the following two paragraphs as they are not needed:

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,59
Temple Place - Suite 330, Boston, MA  02111-1307, USA.

Signed-off-by: Klaus Schwarzkopf <schwarzkopf@sensortherm.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-09-09 16:00:09 -07:00
Kuninori Morimoto 29cc88979a USB: use usb_endpoint_maxp() instead of le16_to_cpu()
Now ${LINUX}/drivers/usb/* can use usb_endpoint_maxp(desc) to get maximum packet size
instead of le16_to_cpu(desc->wMaxPacketSize).
This patch fix it up

Cc: Armin Fuerst <fuerst@in.tum.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Johannes Erdfelt <johannes@erdfelt.com>
Cc: Vojtech Pavlik <vojtech@suse.cz>
Cc: Oliver Neukum <oliver@neukum.name>
Cc: David Kubicek <dave@awk.cz>
Cc: Johan Hovold <jhovold@gmail.com>
Cc: Brad Hards <bhards@bigpond.net.au>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Dahlmann <dahlmann.thomas@arcor.de>
Cc: David Brownell <david-b@pacbell.net>
Cc: David Lopo <dlopo@chipidea.mips.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Xie Xiaobo <X.Xie@freescale.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Jiang Bo <tanya.jiang@freescale.com>
Cc: Yuan-hsin Chen <yhchen@faraday-tech.com>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Xiaochen Shen <xiaochen.shen@intel.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Thomas Abraham <thomas.ab@samsung.com>
Cc: Herbert Pötzl <herbert@13thfloor.at>
Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Cc: Roman Weissgaerber <weissg@vienna.at>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Tony Olech <tony.olech@elandigitalsystems.com>
Cc: Florian Floe Echtler <echtler@fs.tum.de>
Cc: Christian Lucht <lucht@codemercs.com>
Cc: Juergen Stuber <starblue@sourceforge.net>
Cc: Georges Toth <g.toth@e-biz.lu>
Cc: Bill Ryder <bryder@sgi.com>
Cc: Kuba Ober <kuba@mareimbrium.org>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-23 09:47:40 -07:00
Sebastian Andrzej Siewior a8f21156a0 usb: gadget: composite: fix bMaxPacketSize for SuperSpeed
For bMaxPacketSize0 we usually take what is specified in ep0->maxpacket.
This is fine in most cases, however on SuperSpeed bMaxPacketSize0
specifies the exponent instead of the actual size in bytes. The only
valid value on SS is 9 which denotes 512 bytes.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-08-01 22:06:37 +03:00
Sebastian Andrzej Siewior 765f5b830e usb: gadget: defer setting maxpacket till ->setup()
maxpacket is set by the udc driver for ep0 very early. This value is
copied by the function gadget used later for the USB_DT_DEVICE and
USB_DT_DEVICE_QUALIFIER query. This seems to work fine so far. For USB3
we need set a different value here. In SS speed it is 2^x with x=9 and
in HS we set something <= 64. If the UDC starts in SS and continues in
HS after the cable has been plugged it will report a too small value.
There setting of this value is defered and taken automaticly from the
ep0 pointer where the UDC driver can update it according to the speed it
detected _after_ a cable has been plugged.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-07-01 14:31:12 -07:00
Tatyana Brokhman bdb64d7272 usb: gadget: add SuperSpeed support to the Gadget Framework
SuperSpeed USB has defined a new descriptor, called
the Binary Device Object Store (BOS) Descriptor. It
has also changed a bit the definition of SET_FEATURE
and GET_STATUS requests to add USB3-specific details.

This patch implements both changes to the Composite
Gadget Framework.

[ balbi@ti.com : slight changes to commit log
		 fixed a compile error on ARM ]

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-07-01 14:27:05 -07:00
Tatyana Brokhman 35a0e0bf6f usb: gadget: add max_speed to usb_composite_driver
This field is used by the Gadget drivers to specify
the maximum speed they support, meaning: the maximum
speed they can provide descriptors for.

The driver speed will be set in consideration of this
value.

[ balbi@ti.com : dropped the ifdeffery ]

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-07-01 14:27:05 -07:00
Tatyana Brokhman 7c884fe4d7 usb: gadget: coding style fix
fix the coding style of a few switches on the
gadget framework.

[ balbi@ti.com : add a commit log ]

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-28 11:19:40 -07:00
Tatyana Brokhman 48767a4e82 usb: gadget: configure endpoint according to gadget speed
Add config_ep_by_speed() to configure the endpoint
according to the gadget speed.

Using this function will spare the FDs from handling
the endpoint chosen descriptor.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-28 11:14:36 -07:00
Roger Quadros 1b9ba00017 usb: gadget: composite: Allow function drivers to pause control transfers
Some USB function drivers (e.g. f_mass_storage.c) need to delay or defer the
data/status stages of standard control requests like SET_CONFIGURATION or
SET_INTERFACE till they are done with their bookkeeping and are actually ready
for accepting new commands to their interface.

They can now achieve this functionality by returning USB_GADGET_DELAYED_STATUS
in their setup handlers (e.g. set_alt()). The composite framework will then
defer completion of the control transfer by not completing the data/status stages.

This ensures that the host does not send new packets to the interface till the
function driver is ready to take them.

When the function driver that requested for USB_GADGET_DELAYED_STATUS is done
with its bookkeeping, it should signal the composite framework to continue with
the data/status stages of the control transfer. It can do so by invoking
the new API usb_composite_setup_continue(). This is where the control transfer's
data/status stages are completed and host can initiate new transfers.

The DELAYED_STATUS mechanism is currently only supported if the expected data phase
is 0 bytes (i.e. w_length == 0). Since SET_CONFIGURATION and SET_INTERFACE are the
only cases that will use this mechanism, this is not a limitation.

Signed-off-by: Roger Quadros <roger.quadros@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-10 14:14:57 -07:00
Lucas De Marchi 25985edced Fix common misspellings
Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-31 11:26:23 -03:00
Maulik Mankad 2edb11cbac usb: gadget: composite: fix req->length in composite_setup()
When USB CV MSC tests are run on f_mass_storage gadget
Bulk Only Mass Storage Reset fails since req->length
is set to USB_BUFSIZ=1024 in composite_setup().

Initialize req->length to zero to fix this.

Signed-off-by: Maulik Mankad <maulik@ti.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-02-25 11:36:19 -08:00