linux.git/drivers/usb/musb/cppi_dma.c, branch v3.0

usb: musb: drop unneeded musb_debug trickery

2011-05-13T11:34:04+00:00

We have a generic way of enabling/disabling
different debug messages on a driver called
DYNAMIC_PRINTK. Anyone interested in enabling
just part of the debug messages, please read
the documentation under:

Documentation/dynamic-debug-howto.txt

for information on how to use that great
infrastructure.

Signed-off-by: Felipe Balbi

USB: musb: dereferencing an iomem pointer

2011-04-13T08:51:24+00:00

"tx_ram" points to io memory.  We can't dereference it directly.  Sparse
complains about this: "drivers/usb/musb/cppi_dma.c:1205:25: warning:
dereference of noderef expression"

Signed-off-by: Dan Carpenter 
Signed-off-by: Felipe Balbi

USB: musb: silence printk format warning

2011-04-13T08:51:23+00:00

Gcc gives the following warnings:

drivers/usb/musb/cppi_dma.c: In function ‘cppi_next_tx_segment’:
drivers/usb/musb/cppi_dma.c:600: warning: format ‘%x’ expects type ‘unsigned int’, but argument 8 has type ‘dma_addr_t’
drivers/usb/musb/cppi_dma.c: In function ‘cppi_next_rx_segment’:
drivers/usb/musb/cppi_dma.c:822: warning: format ‘%x’ expects type ‘unsigned int’, but argument 9 has type ‘dma_addr_t’
drivers/usb/musb/cppi_dma.c: In function ‘cppi_rx_scan’:
drivers/usb/musb/cppi_dma.c:1042: warning: format ‘%08x’ expects type ‘unsigned int’, but argument 4 has type ‘dma_addr_t’
drivers/usb/musb/cppi_dma.c:1114: warning: format ‘%08x’ expects type ‘unsigned int’, but argument 7 has type ‘dma_addr_t’

dma_addr_t is sometimes 32 bit and sometimes 64.  We normally cast them
to unsigned long long for printk().

Signed-off-by: Dan Carpenter 
Signed-off-by: Felipe Balbi

USB: musb: using 0 instead of NULL

2011-04-13T08:51:21+00:00

Sparse complains (and rightly so):
drivers/usb/musb/cppi_dma.c:1458:33:
	warning: Using plain integer as NULL pointer

Signed-off-by: Dan Carpenter 
Signed-off-by: Felipe Balbi

USB: musb: add missing unlock in cppi_interrupt()

2011-04-13T08:50:58+00:00

We should unlock before returning here.

Signed-off-by: Dan Carpenter 
Signed-off-by: Felipe Balbi

usb: musb: add names for IRQs in structure resource

2010-12-01T08:56:33+00:00

Soon resource data will get automatically
populated from a set of autogenerated data
from TI's hardware database for the OMAP
platform.

Such database, might not have resources at
the expected order by the current drivers.

While we could hack in some exceptions to
that tool to generate resources in a specific
order, it seems less fragile to use the
resource name instead. That way, no matter
what order the resources are generated, the
driver still work.

Modified the OMAP, Blackfin and Davinci
architecture files to add the name of the IRQs
in the resource structures and musb driver to
use the platform_get_irq_byname() api to get
the device and dma irq numbers instead of using
the index.

Cc: Tony Lindgren 
Acked-by: Kevin Hilman 
Acked-by: Mike Frysinger 
Signed-off-by: Hema HK 
Signed-off-by: Felipe Balbi

USB: musb: suppress warning about unused flags

2010-10-22T17:21:55+00:00

Wrap flags with uninitialized_var() to suppress this:

drivers/usb/musb/cppi_dma.c:1158: warning: 'flags' may be used uninitialized
in this function

Signed-off-by: Jon Povey 
Signed-off-by: Felipe Balbi 
Signed-off-by: Greg Kroah-Hartman

usb: musb: gadget: fix dma length in txstate

2010-09-24T18:05:01+00:00

DMA length should not go beyond the availabe space
of request buffer, so fix it.

Also set max_len of cppi dma channel as max size of
int type, so make musb dma handling happier.

Signed-off-by: Ming Lei 
Cc: David Brownell 
Cc: Anand Gadiyar 
Cc: Mike Frysinger 
Cc: Sergei Shtylyov 
Signed-off-by: Felipe Balbi 
Signed-off-by: Greg Kroah-Hartman

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32+00:00

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo 
Guess-its-ok-by: Christoph Lameter 
Cc: Ingo Molnar 
Cc: Lee Schermerhorn

usb: musb: Fix cppi_channel_abort() function to handle Tx abort correctly

2010-03-02T22:53:46+00:00

This patch fixes the Tx abort/teardown logic. We now wait for the teardown
completion interrupt and acknowledge the same by setting the tx_complete
register to 0.

This change is needed to ensure that abort processing works on DM365 platform.
Without this change after completion of abort processing the system is
overwhelmed with continuous stream of abort interrupts.

This change has been tested on all CPPI3.x platforms (DM644x, DM646x, DM35x,
DM36x).

Signed-off-by: Swaminathan S 
Signed-off-by: Felipe Balbi 
Signed-off-by: Greg Kroah-Hartman