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USB protocol allows for 16 IN and 16 OUT endpoints (USB 2.0 Spec,
8.3.2.2 Endpoint Field). A function may have an EP 1 for both IN and OUT,
so these two should be kept separate. As EPs are either BULK or INTERRUPT
(or ISO), it is fine to have one array per direction for all transfer
types (also see e236519b7365ef75c5da6a5623f0b03d9c00cfae).
USB device address is 7 bits, so a bus may have more than 16 devices.
Check the device number, as the DWC2 driver only supports BULK/ISO for
the first 16 devices.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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CSPLITs for INTERRUPT transactions have to be scheduled in each microframe
following the SSPLIT. INTERRUPT transfers are executed in the next even/
odd microframe depending on the HCCHAR_ODDFRM flag.
As there are no handshakes for INTERRUPT SSPLITs the SSPLIT may have
failed (transport error) without the error being detected by the host
driver. If the last CSPLIT is not received within 4 microframes after the
SSPLIT there was a transaction error and the complete transaction has
to be restarted.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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In contrast to non-SPLIT transfers each transaction has to be submitted
as an individual chunk.
The transaction state machine proceeds from SSPLIT to CSPLIT if the ACK
flag is set. CSPLIT has to be repeated while NYET is set.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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The split register setting is used for both SSPLIT and CSPLIT transactions,
the bit for CSPLIT has to be set seperately.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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Split the movement of data between CPU and Host Controller from the
status handling and tracking of transfer progress.
This will also simplify adding of SPLIT transaction support.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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A transfer is completed if the XFERCOMP flag is set, irrespective of the
ACK flag. BULK OUT transfers to some HS devices complete without having
the ACK flag set, which signal the devices has responded with an NYET
to the transfer (PING protocol).
The new behaviour matches the Linux kernel minus any PING protocol.
Also see 5966defabdcc (usb: dwc2: fix bulk transfers)
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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Fix two errors in transfer len calculation, move loop invariant code out
of loop.
If xfer_len is equal to CONFIG_DWC2_MAX_TRANSFER_SIZE (or slightly
smaller), the xfer_len will be to large, e.g.:
xfer_len = MAX_TRANSFER_SIZE = 65535
max packet size = 512
=> num_packets = 128
=> IN xfer_len = 65536
For OUT transactions larger than (65536 - mps) bytes, the xfer_len
determination is quite awkward, it is only correct due to:
- max_packet_size for control/bulk/interrupt is required to be
power-of-two.
- (CONFIG_DWC2_MAX_TRANSFER_SIZE + 1) % max-packet-size is zero
for all allowed (2^3 ... 2^9) packet sizes
As the max xfer len is loop invariant, it can be moved out of the loop.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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Use existing library function to poll bit(s).
Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
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flush_dcache_range may access data after priv->aligned_buffer end if
len > DWC2_DATA_BUF_SIZE.
memcpy may access data after buffer end if done > 0
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
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Now that we have a new header file for cache-aligned allocation, we should
move the stack-based allocation macro there also.
Signed-off-by: Simon Glass <sjg@chromium.org>
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This driver is not used only on exynos, but also on Altera SoCFPGA,
HiSilicon SoCs, RPi etc, so rename it accordingly to prevent confusion.
Signed-off-by: Marek Vasut <marex@denx.de>
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Add the Synopsys compatible string. This is used in SoCFPGA DT files.
Signed-off-by: Marek Vasut <marex@denx.de>
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This adds dcache support for dwc2. The DMA buffers must be DMA aligned and
is flushed for outgoing transactions before starting transfer. For
ingoing transactions it is invalidated after the transfer has finished.
Signed-off-by: Alexander Stein <alexanders83@web.de>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
[trini: Update to apply again on top of DM patches]
Signed-off-by: Tom Rini <trini@konsulko.com>
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Add driver model support to this driver so it can be used with the new USB
stack.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Put all global data in a structure and move (what will be) common code into
common functions. This will make the driver-model conversion much easier.
Signed-off-by: Simon Glass <sjg@chromium.org>
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This patch makes the dwc2 controller like ehci / ohci / xhci controllers
by calling the board_usb_init() function from usb_lowlevel_init.
This can then be implemented by specific platforms to initialise
their USB hardware (phys / clocks etc).
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
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This has been tested to the extent that I can enumerate
a asix usb networking adapter and boot a kernel over usb
on the 96boards hikey u-boot port I'm currently doing.
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
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IIUC, interrupt transfers are NAK'd by devices until they wish to trigger
an interrupt, and e.g. EHCI controllers retry these in HW until they are
ACK'd. However, DWC2 doesn't seem to retry, so we need to do this in SW.
In practice, I've seen DWC2_HCINT_FRMOVRUN happen too. I'm not quite sure
what this error implies; perhaps it's related to how near the end of a
USB frame we're at when the interrupt transfer is initiated? Anyway,
retrying this temporary error seems to be necessary too.
With all these commits applied, both my USB keyboards (one LS Lenovo and
one FS Dell) work correctly when there is no USB hub between the SoC and
the keyboard; We still need split transactions to be implemented for hubs
to work.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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As best I can tell, there's no difference between bulk and interrupt
transfers in terms of how the HW should be programmed, at least given
that we're executing one transaction at a time rather than scheduling
them into frames for maximum throughput.
This patch ends up sharing the toggle bit state between bulk and
interrupt transfers on a particular EP. However I believe this is fine;
AFAIK a given EP either uses bulk or interrupt transfers and doesn't mix
them.
This patch doesn't do anything with the "interval" parameter for
interrupt transfers, but then most other USB controller drivers in U-Boot
don't either.
It turns out that one of my keyboards is happy to work using control
transfers but the other only gives non-zero "HID reports" via interrupt
transfers.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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A bit must be set in HCCHAR when communicating with low-speed devices.
I have no idea why there's no corresponding bit to distinguish between
full-speed and high-speed devices, but no matter; they all work now!
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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This doesn't make my LS keyboard work any better, but it does at least
report the correct speed in "usb tree".
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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Use of these APIs is required on the Raspberry Pi. With this change, USB
on RPi1 should be more reliable, and USB on the RPi2 will start working.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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When I created wait_for_chhltd(), I noticed that some instances of the
code it replaced expected the ACK bit to be set and others didn't. I
assumed this was an accidental inconsistency in the code, so wrote
wait_for_chhltd() to always expect ACK to be set. This code appeared to
work correctly for both enumeration of USB keyboards and operation of
USB Ethernet devices. However, this change broke USB Mass Storage (at
least my USB SD card reader). This change reverts to exactly the
original behaviour. I'm not sure why the ACK bit isn't always set
(perhaps a quirk in the USB HW or DWC2 controller), but the code works
this way!
Fixes: 5be4ca7d6ac8 ("usb: dwc2: unify waiting for transfer completion")
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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Each USB transfer is split up into chunks that are held in an aligned
buffer. This imposes a limit on the size of each chunk, but no limit on
the total size of transferred data. Fix the logic in chunk_msg() not to
reject large transfers, but simply take the size of the aligned buffer
into account when calculating the chunk size.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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The original aligned_buffer usage:
a) Uselessly copied data into the aligned buffer even for IN
transactions. Fix this my making the copy conditional.
b) Always programmed the HW to transfer to/from the start of the aligned
buffer. This worked fine for OUT transactions since the memcpy copied
the OUT data to this location too. However, for large IN transactions,
since the copy from the aligned buffer to the "client" buffer was
deferred until after all chunks were transferred. it resulted in each
chunk's transfer over-writing the data for the first transfer. Fix
this by copying IN data as soon as it's received.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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toggle is never NULL. Simplify the code by removing handling of when it
is NULL.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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The control data toggle resets to DATA1 at the start of the data phase
of every setup transaction. We don't need a global variable to store
the value; we can just store it on the stack.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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This removes duplicated code.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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Move the body of submit_bulk_msg() into new function chunk_msg(). This
can be shared with submit_control_msg() to reduce code duplication, and
allow control messages larger than maxpacket.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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Lift common code out of submit_bulk_msg() and submit_control_msg().
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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U-Boot has never cared about the type when we get max/min of two
values, but Linux Kernel does. This commit gets min, max, min3, max3
macros synced with the kernel introducing type checks.
Many of references of those macros must be fixed to suppress warnings.
We have two options:
- Use min, max, min3, max3 only when the arguments have the same type
(or add casts to the arguments)
- Use min_t/max_t instead with the appropriate type for the first
argument
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Pavel Machek <pavel@denx.de>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
[trini: Fixup arch/blackfin/lib/string.c]
Signed-off-by: Tom Rini <trini@ti.com>
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This is the USB host controller used on the Altera SoCFPGA and Raspbery Pi.
This code has three checkpatch warnings, but to make sure it stays at least
readable and clear, these are not fixed. These bugs are in the USB request
handling combinatorial logic, so any abstracting of those is out of question.
Tested on DENX MCV (Altera SoCFPGA 5CSFXC6C6U23C8N) and RPi B+ (BCM2835).
Signed-off-by: Oleksandr Tymoshenko <gonzo@bluezbox.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Pavel Machek <pavel@denx.de>
Cc: Vince Bridgers <vbridger@altera.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
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