usb: gadget: function: move u_f.h to include/linux/usb/func_utils.h

We move the func_utils.h header to include/linux/usb to be
able to compile function drivers outside of the
drivers/usb/gadget/func

usb: gadget: function: move u_f.h to include/linux/usb/func_utils.h

We move the func_utils.h header to include/linux/usb to be
able to compile function drivers outside of the
drivers/usb/gadget/function directory.

Signed-off-by: Michael Grzeschik <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: gadget: add missing MODULE_DESCRIPTION() macros

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/libcomposite.o
WARNING: modpost:

usb: gadget: add missing MODULE_DESCRIPTION() macros

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/libcomposite.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_acm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ss_lb.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/u_serial.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_serial.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_obex.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/u_ether.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ncm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ecm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_phonet.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_eem.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ecm_subset.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_rndis.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_mass_storage.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_fs.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uac1.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uac1_legacy.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uac2.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uvc.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_midi.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_midi2.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_hid.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_printer.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_tcm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/legacy/g_zero.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/legacy/g_midi.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/legacy/g_dbgp.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.

Signed-off-by: Jeff Johnson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: gadget: remove max support speed info in bind operation

Take ecm_bind() for example, it call gadget_is_{*}speed() API to show
gadget max support speed, it is not much help, remove the API usage

usb: gadget: remove max support speed info in bind operation

Take ecm_bind() for example, it call gadget_is_{*}speed() API to show
gadget max support speed, it is not much help, remove the API usage here
is safe.

Similar change apply to acm,eem,loopback,ncm,obex,rndis,serial,
sourcesink,subset functions.

Signed-off-by: Linyu Yuan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: fix various gadgets null ptr deref on 10gbps cabling.

This avoids a null pointer dereference in
f_{ecm,eem,hid,loopback,printer,rndis,serial,sourcesink,subset,tcm}
by simply reusing the 5gbps c

usb: fix various gadgets null ptr deref on 10gbps cabling.

This avoids a null pointer dereference in
f_{ecm,eem,hid,loopback,printer,rndis,serial,sourcesink,subset,tcm}
by simply reusing the 5gbps config for 10gbps.

Fixes: eaef50c76057 ("usb: gadget: Update usb_assign_descriptors for SuperSpeedPlus")
Cc: Christophe JAILLET <[email protected]>
Cc: Felipe Balbi <[email protected]>
Cc: Gustavo A. R. Silva <[email protected]>
Cc: Lorenzo Colitti <[email protected]>
Cc: Martin K. Petersen <[email protected]>
Cc: Michael R Sweet <[email protected]>
Cc: Mike Christie <[email protected]>
Cc: Pawel Laszczak <[email protected]>
Cc: Peter Chen <[email protected]>
Cc: Sudhakar Panneerselvam <[email protected]>
Cc: Wei Ming Chen <[email protected]>
Cc: Will McVicker <[email protected]>
Cc: Zqiang <[email protected]>
Reviewed-By: Lorenzo Colitti <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Maciej Żenczykowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break/return/fallthrough
statements instead of

usb: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break/return/fallthrough
statements instead of letting the code fall through to the next
case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <[email protected]>
Link: https://lore.kernel.org/r/a76da7ca5b4f41c13d27b298accb8222d0b04e61.1605896060.git.gustavoars@kernel.org
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

USB: gadget: function: Remove redundant license text

Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner. So the extra GPL text wording
c

USB: gadget: function: Remove redundant license text

Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner. So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text. And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Oliver Neukum <[email protected]>
Cc: Johan Hovold <[email protected]>
Cc: Jerry Zhang <[email protected]>
Cc: John Keeping <[email protected]>
Cc: Krzysztof Opasiak <[email protected]>
Cc: Abdulhadi Mohamed <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Janusz Dziedzic <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Acked-by: Michal Nazarewicz <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Acked-by: Vincent Pelletier <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

USB: add SPDX identifiers to all remaining files in drivers/usb/

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/

USB: add SPDX identifiers to all remaining files in drivers/usb/

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/usb/ and include/linux/usb* files with the correct
SPDX license identifier based on the license text in the file itself.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Acked-by: Johan Hovold <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: gadget: make config_item_type structures const

Make these structures const as they are only passed to the const
argument of the functions config_{group/item}_init_type_name.

Signed-off-by: Bhu

usb: gadget: make config_item_type structures const

Make these structures const as they are only passed to the const
argument of the functions config_{group/item}_init_type_name.

Signed-off-by: Bhumika Goyal <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>

show more ...

usb: gadget: remove variable ret and remove unnecessary if statement

the if statement in lb_modinit is unnecessary so we can totally
remove the variable ret and just return the return value from
the

usb: gadget: remove variable ret and remove unnecessary if statement

the if statement in lb_modinit is unnecessary so we can totally
remove the variable ret and just return the return value from
the call to usb_function_register.

Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: remove useless parameter in alloc_ep_req()

The default_length parameter of alloc_ep_req was not really necessary
and gadget drivers would almost always create an inline function to pass

usb: gadget: remove useless parameter in alloc_ep_req()

The default_length parameter of alloc_ep_req was not really necessary
and gadget drivers would almost always create an inline function to pass
the same value to len and default_len.

This patch removes that parameter and updates all calls to alloc_ep_req() to
use the new API.

Signed-off-by: Felipe F. Tonello <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: Update usb_assign_descriptors for SuperSpeedPlus

Add the 'ssp_descriptors' parameter to the usb_assign_descriptors()
function. This allows a function driver to add descriptors for
Super

usb: gadget: Update usb_assign_descriptors for SuperSpeedPlus

Add the 'ssp_descriptors' parameter to the usb_assign_descriptors()
function. This allows a function driver to add descriptors for
SuperSpeedPlus speeds if it supports it.

Also update all uses of this function in the gadget subsystem so that
they pass NULL for the ssp_descriptors parameters.

Signed-off-by: John Youn <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: f_loopback: fix the warning during the enumeration

The current code tries to allocate memory with GFP_KERNEL at
interrupt context, it would show below warning during the enumeration
whe

usb: gadget: f_loopback: fix the warning during the enumeration

The current code tries to allocate memory with GFP_KERNEL at
interrupt context, it would show below warning during the enumeration
when I test it with chipidea hardware, change GFP flag as GFP_ATOMIC
can fix this issue.

[ 40.438237] zero gadget: high-speed config #2: loopback
[ 40.444924] ------------[ cut here ]------------
[ 40.449609] WARNING: CPU: 0 PID: 0 at kernel/locking/lockdep.c:2755 lockdep_trace_alloc+0x108/0x128()
[ 40.461715] DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))
[ 40.467130] Modules linked in:
[ 40.470216] usb_f_ss_lb g_zero libcomposite evbug
[ 40.473822] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.3.0-rc5-00168-gb730aaf #604
[ 40.481496] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[ 40.487345] Backtrace:
[ 40.489857] [<80014e94>] (dump_backtrace) from [<80015088>] (show_stack+0x18/0x1c)
[ 40.497445] r6:80b67a80 r5:00000000 r4:00000000 r3:00000000
[ 40.503234] [<80015070>] (show_stack) from [<802e27b4>] (dump_stack+0x8c/0xa4)
[ 40.510503] [<802e2728>] (dump_stack) from [<8002cfe8>] (warn_slowpath_common+0x80/0xbc)
[ 40.518612] r6:8007510c r5:00000009 r4:80b49c88 r3:00000001
[ 40.524396] [<8002cf68>] (warn_slowpath_common) from [<8002d05c>] (warn_slowpath_fmt+0x38/0x40)
[ 40.533109] r8:bcfdef80 r7:bdb705cc r6:000080d0 r5:be001e80 r4:809cc278
[ 40.539965] [<8002d028>] (warn_slowpath_fmt) from [<8007510c>] (lockdep_trace_alloc+0x108/0x128)
[ 40.548766] r3:809d0128 r2:809cc278
[ 40.552401] r4:600b0193
[ 40.554990] [<80075004>] (lockdep_trace_alloc) from [<801093d4>] (kmem_cache_alloc+0x28/0x15c)
[ 40.563618] r4:000080d0 r3:80b4aa8c
[ 40.567270] [<801093ac>] (kmem_cache_alloc) from [<804d95e4>] (ep_alloc_request+0x58/0x68)
[ 40.575550] r10:7f01f104 r9:00000001 r8:bcfdef80 r7:bdb705cc r6:bc178700 r5:00000000
[ 40.583512] r4:bcfdef80 r3:813c0a38
[ 40.587183] [<804d958c>] (ep_alloc_request) from [<7f01f7ec>] (loopback_set_alt+0x114/0x21c [usb_f_ss_lb])
[ 40.596929] [<7f01f6d8>] (loopback_set_alt [usb_f_ss_lb]) from [<7f006910>] (composite_setup+0xbd0/0x17e8 [libcomposite])
[ 40.607902] r10:bd3a2c0c r9:00000000 r8:bcfdef80 r7:bc178700 r6:bdb702d0 r5:bcfdefdc
[ 40.615866] r4:7f0199b4 r3:00000002
[ 40.619542] [<7f005d40>] (composite_setup [libcomposite]) from [<804dae88>] (udc_irq+0x784/0xd1c)
[ 40.628431] r10:80bb5619 r9:c0876140 r8:00012001 r7:bdb71010 r6:bdb70568 r5:00010001
[ 40.636392] r4:bdb70014
[ 40.638985] [<804da704>] (udc_irq) from [<804d64f8>] (ci_irq+0x5c/0x118)
[ 40.645702] r10:80bb5619 r9:be11e000 r8:00000117 r7:00000000 r6:bdb71010 r5:be11e060
[ 40.653666] r4:bdb70010
[ 40.656261] [<804d649c>] (ci_irq) from [<8007f638>] (handle_irq_event_percpu+0x7c/0x13c)
[ 40.664367] r6:00000000 r5:be11e060 r4:bdb05cc0 r3:804d649c
[ 40.670149] [<8007f5bc>] (handle_irq_event_percpu) from [<8007f740>] (handle_irq_event+0x48/0x6c)
[ 40.679036] r10:00000000 r9:be008000 r8:00000001 r7:00000000 r6:bdb05cc0 r5:be11e060
[ 40.686998] r4:be11e000
[ 40.689581] [<8007f6f8>] (handle_irq_event) from [<80082850>] (handle_fasteoi_irq+0xd4/0x1b0)
[ 40.698120] r6:80b56a30 r5:be11e060 r4:be11e000 r3:00000000
[ 40.703898] [<8008277c>] (handle_fasteoi_irq) from [<8007ec04>] (generic_handle_irq+0x28/0x3c)
[ 40.712524] r7:00000000 r6:80b4aaf4 r5:00000117 r4:80b445fc
[ 40.718304] [<8007ebdc>] (generic_handle_irq) from [<8007ef20>] (__handle_domain_irq+0x6c/0xe8)
[ 40.727033] [<8007eeb4>] (__handle_domain_irq) from [<800095d4>] (gic_handle_irq+0x48/0x94)
[ 40.735402] r9:c080f100 r8:80b4ac6c r7:c080e100 r6:80b67d40 r5:80b49f00 r4:c080e10c
[ 40.743290] [<8000958c>] (gic_handle_irq) from [<80015d38>] (__irq_svc+0x58/0x78)
[ 40.750791] Exception stack(0x80b49f00 to 0x80b49f48)
[ 40.755873] 9f00: 00000001 00000001 00000000 80024320 80b48000 80b4a9d0 80b4a984 80b433e4
[ 40.764078] 9f20: 00000001 807f4680 00000000 80b49f5c 80b49f20 80b49f50 80071ca4 800113fc
[ 40.772272] 9f40: 200b0013 ffffffff
[ 40.775776] r9:807f4680 r8:00000001 r7:80b49f34 r6:ffffffff r5:200b0013 r4:800113fc
[ 40.783677] [<800113d4>] (arch_cpu_idle) from [<8006c5bc>] (default_idle_call+0x28/0x38)
[ 40.791798] [<8006c594>] (default_idle_call) from [<8006c6dc>] (cpu_startup_entry+0x110/0x1b0)
[ 40.800445] [<8006c5cc>] (cpu_startup_entry) from [<807e95dc>] (rest_init+0x12c/0x168)
[ 40.808376] r7:80b4a8c0 r3:807f4b7c
[ 40.812030] [<807e94b0>] (rest_init) from [<80ad7cc0>] (start_kernel+0x360/0x3d4)
[ 40.819528] r5:80bcb000 r4:80bcb050
[ 40.823171] [<80ad7960>] (start_kernel) from [<8000807c>] (0x8000807c)

It fixes commit 91c42b0da8e3 ("usb: gadget: loopback: Fix looping back
logic implementation").

Cc: <[email protected]> # v3.18+
Signed-off-by: Peter Chen <[email protected]>
Reviewed-by: Krzysztof Opasiak <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: loopback: Fix looping back logic implementation

Since commit e0857ce58e8658657f5f12fe25272b93cfeb16aa
("usb: gadget: loopback: don't queue requests to bogus endpoints")

Loopback functi

usb: gadget: loopback: Fix looping back logic implementation

Since commit e0857ce58e8658657f5f12fe25272b93cfeb16aa
("usb: gadget: loopback: don't queue requests to bogus endpoints")

Loopback function is not realy working as that commit removed
all looping back logic. After that commit ep-out works like
/dev/null and ep-in works like /dev/zero.

This commit fix this issue by allocating set of out requests
and set of in requests but each out req shares buffer with
one in req:

out_req->buf ---> buf <--- in_req.buf
out_req->context <---> in_req.context

The completion routine simply enqueue the suitable req in
an oposite direction.

Cc: <[email protected]> # 3.18+
Fixes: e0857ce58e8658657f5f12fe25272b93cfeb16aa
("usb: gadget: loopback: don't queue requests to bogus endpoints")

Signed-off-by: Krzysztof Opasiak <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: loopback: fix: Don't share qlen and buflen between instances

Each instance of loopback function may have different qlen
and buflen attributes values. When linking function to
configurat

usb: gadget: loopback: fix: Don't share qlen and buflen between instances

Each instance of loopback function may have different qlen
and buflen attributes values. When linking function to
configuration those values had been assigned to global
variables. Linking other instance to config overwrites those
values.

This commit moves those values to f_loopback structure
to avoid overwriting. Now each function has its own instance
of those values.

Signed-off-by: Krzysztof Opasiak <[email protected]>
Reviewed-by: Robert Baldyga <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb-gadget/f_loopback: use per-attribute show and store methods

To simplify the configfs interface and remove boilerplate code that also
causes binary bloat.

Signed-off-by: Christoph Hellwig <hch@l

usb-gadget/f_loopback: use per-attribute show and store methods

To simplify the configfs interface and remove boilerplate code that also
causes binary bloat.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Andrzej Pietrasiewicz <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>

show more ...

usb: gadget: loopback: Fix show methods for attributes

Most of USB functions place new line after attribute value.
Let's follow this convention also in loopback function
as it improves readability.

usb: gadget: loopback: Fix show methods for attributes

Most of USB functions place new line after attribute value.
Let's follow this convention also in loopback function
as it improves readability.

Signed-off-by: Krzysztof Opasiak <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: f_loopback: eliminate abuse of ep->driver data

Since ep->driver_data is not used for endpoint claiming, neither for
enabled/disabled state storing, we can reduce number of places where

usb: gadget: f_loopback: eliminate abuse of ep->driver data

Since ep->driver_data is not used for endpoint claiming, neither for
enabled/disabled state storing, we can reduce number of places where
we read or modify it's value, as now it has no particular meaning for
function or framework logic.

In case of f_hid we only need to store in ep->driver_data pointer to
struct f_loopback, as it's used in loopback_complete() callback. All
other uses of ep->driver_data are now meaningless and can be safely
removed.

Signed-off-by: Robert Baldyga <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: loopback: Remove out-of-date comment

As loopback function has been reworked for ConfigFS
composite gadget this comment is no longer valid.

Signed-off-by: Krzysztof Opasiak <k.opasiak@s

usb: gadget: loopback: Remove out-of-date comment

As loopback function has been reworked for ConfigFS
composite gadget this comment is no longer valid.

Signed-off-by: Krzysztof Opasiak <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

Revert "usb: gadget: zero: Add support for interrupt EP"

This reverts commit ef11982dd7a657512c362242508bb4021e0d67b6.

That commit creates a problem for some UDCs (at least musb)
where it allocates

Revert "usb: gadget: zero: Add support for interrupt EP"

This reverts commit ef11982dd7a657512c362242508bb4021e0d67b6.

That commit creates a problem for some UDCs (at least musb)
where it allocates an endpoints with a 64-byte FIFO, but later
tries to use that same FIFO for 1024-byte packets.

Before implementing this, composite framework needs to be
modified so we only allocate endpoints after we know negotiated
speed, however that needs quite a bit of extra work.

Cc: <[email protected]> # v3.18+
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: loopback: don't queue requests to bogus endpoints

A request allocated from e.g. ep1out cannot
be queued to any other endpoint. This bug has
been in f_loopback at least since mid-2011 an

usb: gadget: loopback: don't queue requests to bogus endpoints

A request allocated from e.g. ep1out cannot
be queued to any other endpoint. This bug has
been in f_loopback at least since mid-2011 and
since nobody has really screamed about it, we're
not backporting to any stable kernels.

Debugged with MUSB since that's the only controller
which complains about this case.

Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: zero: Add support for interrupt EP

Interrupt endpoints behave quite similar to the bulk endpoints with the
difference that the endpoints expect data sending/reception request at
particu

usb: gadget: zero: Add support for interrupt EP

Interrupt endpoints behave quite similar to the bulk endpoints with the
difference that the endpoints expect data sending/reception request at
particular intervals till the whole data has not been transmitted.

The interrupt EP support is added to gadget zero. A new alternate setting (=2)
has been added. It has 2 interrupt endpoints. The default parameters are set as:
bInterval: 1 ms for FS and 8 uFrames (implying 1 ms) for HS/SS
wMaxPacketSize: 64 bytes for FS and 1024 bytes for HS/SS
However, the same can be overridden through the module parameter interface.

The code is tested for HS and SS on a platform having DWC3 controller.

Signed-off-by: Amit Virdi <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...

usb: gadget: Gadget directory cleanup - group usb functions

The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch mov

usb: gadget: Gadget directory cleanup - group usb functions

The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the USB functions implementations into a separate directory.

Signed-off-by: Andrzej Pietrasiewicz <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

show more ...