linux-toradex.git/drivers/mcb, branch v4.13-rc7

mcb: fix compiler warning logical-op in mcb-parse.c

2016-11-15T09:52:37+00:00

The expression was clearly wrong, the logical AND of expressions
must be changed to a logical OR.

Reported-by: David Binderman 
Signed-off-by: Michael Moese 
Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman

mcb: Add a dma_device to mcb_device

2016-09-27T10:33:47+00:00

When performing DMA operations on a MCB device, the device needed
for using the DMA API is "mcb_device->bus_carrier".
This is rather lengthy, so a shortcut is introduced to struct mcb_device
in order to ensure the MCB device driver uses the correct device for DMA
operations.

Signed-off-by: Michael Moese 
Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman

mcb: Enable PCI bus mastering by default

2016-09-27T10:33:47+00:00

In order to successfully perform DMA operations on PCI devices,
it is necessary to enble PCI bus mastering, so enable it by default.

Signed-off-by: Michael Moese 
Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman

mcb: remove sub-device handling code

2016-08-31T11:16:24+00:00

The MEN Chameleon specification states that a chameleon FPGA can include a
bridge descriptor, which then opens up a new bus behind this bridge. MCB
included subdevice handling code in the core, but no support for bus
descriptors in the parser, due to a lack of hardware access.

As this is technically dead code, but it gets executed on a device add,
I've decided to remove it.

Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman

mcb: Added bar descriptor support for non PCI bus MCB carrier

2016-08-31T11:16:24+00:00

Added support for the bar descriptor. This type is used for FPGAs
connect to the LPC or to a non PCI bus.

The Bar descriptor could have a maximum of 6 BARs. Each of the
devices within the FPGA could be mapped to a different BAR.
The BAR descriptor is comparable to the PCI header.

Signed-off-by: Andreas Werner 
[ free bar descriptor in the non-error case ]
Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman

mcb: Added support for LPC or non PCI based MCB carrier

2016-08-31T11:16:24+00:00

Add support for MCB bases FPGAs connected to the LPC or
non PCI Bus.

This driver currently supports the SC24 board. The FPGA
is connected to the LPC bus and is identified using the BIOS
DMI string.

Signed-off-by: Andreas Werner 
Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman

mcb: Acquire reference to carrier module in core

2016-06-14T01:49:30+00:00

Acquire a reference to the carrier's kernel module in bus code, so
it can't be removed from the kernel while it still has a bus and thus
possibly devices attached to it.

Signed-off-by: Johannes Thumshirn 
Reported-by: Andreas Werner 
Tested-by: Andreas Werner 
Signed-off-by: Greg Kroah-Hartman

mcb: Acquire reference to device in probe

2016-06-14T01:49:30+00:00

mcb_probe() does not aqcuire a reference to the probed device but drops one
when removing the device. As it is actually using the device, it should grab
a reference via get_device().

This could lead to a panic found with a rmmod/modprobe stress test

Signed-off-by: Johannes Thumshirn 
Reported-by: Andreas Werner 
Tested-by: Andreas Werner 
Signed-off-by: Greg Kroah-Hartman

mcb: Delete num_cells variable which is not required

2016-05-03T22:52:28+00:00

The num_cells variable is only used in the dev_dbg print,
but we can directly use the ret variable which also includes the same
value.

Signed-off-by: Andreas Werner 
Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman

mcb: Fixed bar number assignment for the gdd

2016-05-03T22:52:28+00:00

The bar number is found in reg2 within the gdd. Therefore
we need to change the assigment from reg1 to reg2 which
is the correct location.

Signed-off-by: Andreas Werner 
Fixes: '3764e82e5' drivers: Introduce MEN Chameleon Bus
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Johannes Thumshirn 
Signed-off-by: Greg Kroah-Hartman