linux-toradex.git/drivers/usb/musb/musb_cppi41.c, branch v5.12-rc8

usb: musb: remove duplicated quirks flag

2018-05-22T10:03:24+00:00

Both musb_io and musb_platform_ops in struct musb define a quirks flag
for the same purpose.  Let's remove the one in struct musb_io, and use
that in struct musb_platform_ops instead.

Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

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

2017-11-04T10:48:02+00:00

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 
Cc: Kate Stewart 
Cc: Philippe Ombredanne 
Signed-off-by: Greg Kroah-Hartman 
Acked-by: Felipe Balbi 
Acked-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

usb: musb: musb_cppi41: Configure the number of channels for DA8xx

2017-10-17T09:42:51+00:00

Currently, the number of channels is set to 15 but in the case of DA8xx,
the number of channels is 4.
Update the driver to configure the number of channels at runtime.

Cc: stable@vger.kernel.org  # v4.12+
Signed-off-by: Alexandre Bailon 
Tested-by: Sekhar Nori 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

usb: musb: musb_cppi41: Fix cppi41_set_dma_mode() for DA8xx

2017-10-17T09:42:51+00:00

The way to configure the DMA mode on DA8xx is different from DSPS.
Add a new function to configure DMA mode on DA8xx and use a callback
to call the right function based on the platform.

Cc: stable@vger.kernel.org  # v4.12+
Signed-off-by: Alexandre Bailon 
Tested-by: Sekhar Nori 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

usb: musb: musb_cppi41: Fix the address of teardown and autoreq registers

2017-10-17T09:42:51+00:00

The DA8xx and DSPS platforms don't use the same address for few registers.
On Da8xx, this is causing some issues (e.g. teardown that doesn't work).
Configure the address of the register during the init and use them instead
of constants.

Cc: stable@vger.kernel.org  # v4.12+
Reported-by: nsekhar@ti.com
Signed-off-by: Alexandre Bailon 
Tested-by: Sekhar Nori 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

usb: musb: musb_cppi41: Defer probe only if DMA is not ready

2017-06-20T03:45:01+00:00

If dma_request_slave_channel() failed to return a channel,
then the driver will print an error and request to defer probe,
regardless of the cause of the failure.
Defer if the DMA is not ready yet otherwise print an error.

Signed-off-by: Alexandre Bailon 
Reviewed-by: Johan Hovold 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

usb: musb: musb_cppi41: Workaround DMA stall issue during teardown

2017-04-18T14:48:26+00:00

The DMA may hang up if a teardown is initiated while an endpoint is still
active (Advisory 2.3.27 of DA8xx errata).
To workaround this issue, add a delay before to initiate the teardown.

Signed-off-by: Alexandre Bailon 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

usb: musb: cppi41: don't check early-TX-interrupt for Isoch transfer

2017-03-14T09:13:14+00:00

The CPPI 4.1 driver polls register to workaround the premature TX
interrupt issue, but it causes audio playback underrun when triggered in
Isoch transfers.

Isoch doesn't do back-to-back transfers, the TX should be done by the
time the next transfer is scheduled. So skip this polling workaround for
Isoch transfer.

Fixes: a655f481d83d6 ("usb: musb: musb_cppi41: handle pre-mature TX complete interrupt")
Cc:  #4.1+
Reported-by: Alexandre Bailon 
Acked-by: Sebastian Andrzej Siewior 
Tested-by: Alexandre Bailon 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

usb: musb: cppi_dma: Clean up cppi41_dma_controller structure

2017-02-09T12:35:05+00:00

A pointer to musb is now present in the dma_controller structure.
Remove the one present in cppi41_dma_controller structure.

Signed-off-by: Alexandre Bailon 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman

usb: musb: cppi41: Detect aborted transfers in cppi41_dma_callback()

2017-02-09T12:35:05+00:00

Update cppi41_dma_callback() to detect an aborted transfer.
This was not required before because cppi41_dma_callback() was only
invoked on transfer completion.
In order to make CPPI 4.1 driver more generic, cppi41_dma_callback()
will be invoked after a transfer abort in order to let the MUSB driver
perform some action such as acknowledge the interrupt that may be fired
during a teardown.

Signed-off-by: Alexandre Bailon 
Signed-off-by: Bin Liu 
Signed-off-by: Greg Kroah-Hartman