linux-toradex.git/drivers/nubus, branch v5.0

nubus: Set default dma mask for nubus_board devices

2018-07-23T13:07:12+00:00

A 32-bit mask is used by default because a NuBus slot has 32
address/data lines and a NuBus board is free to use all of them.

Cc: Greg Kroah-Hartman 
Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Geert Uytterhoeven

Merge tag 'char-misc-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2018-06-05T23:20:22+00:00

Pull char/misc driver updates from Greg KH:
 "Here is the "big" char and misc driver patches for 4.18-rc1.

  It's not a lot of stuff here, but there are some highlights:

   - coreboot driver updates

   - soundwire driver updates

   - android binder updates

   - fpga big sync, mostly documentation

   - lots of minor driver updates

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (81 commits)
  vmw_balloon: fixing double free when batching mode is off
  MAINTAINERS: Add driver-api/fpga path
  fpga: clarify that unregister functions also free
  documentation: fpga: move fpga-region.txt to driver-api
  documentation: fpga: add bridge document to driver-api
  documentation: fpga: move fpga-mgr.txt to driver-api
  Documentation: fpga: move fpga overview to driver-api
  fpga: region: kernel-doc fixes
  fpga: bridge: kernel-doc fixes
  fpga: mgr: kernel-doc fixes
  fpga: use SPDX
  fpga: region: change api, add fpga_region_create/free
  fpga: bridge: change api, don't use drvdata
  fpga: manager: change api, don't use drvdata
  fpga: region: don't use drvdata in common fpga code
  Drivers: hv: vmbus: Removed an unnecessary cast from void *
  ver_linux: Drop redundant calls to system() to test if file is readable
  ver_linux: Move stderr redirection from function parameter to function body
  misc: IBM Virtual Management Channel Driver (VMC)
  rpmsg: Correct support for MODULE_DEVICE_TABLE()
  ...

proc: introduce proc_create_single{,_data}

2018-05-16T05:23:35+00:00

Variants of proc_create{,_data} that directly take a seq_file show
callback and drastically reduces the boilerplate code in the callers.

All trivial callers converted over.

Signed-off-by: Christoph Hellwig

nubus: Call bus_register unconditionally

2018-05-14T14:27:08+00:00

Loading a NuBus driver module on a non-NuBus machine triggers the
BUG_ON(!drv->bus->p) in driver_register(), because bus_register() was
not called, because it is conditional on MACH_IS_MAC.

Fix the crash by calling bus_register() unconditionally. Call it from
a postcore_initcall(), like other busses do.

Hence, the bus type is available for device_register(), which happens
in a subsys initcall, and for driver_register(), which happens in a
device or module initcall.

Cc: Greg Kroah-Hartman 
Reported-by: Michael Schmitz 
Tested-by: Stan Johnson 
Fixes: 7f86c765a6a2 ("nubus: Add support for the driver model")
Signed-off-by: Finn Thain 
Reviewed-by: Geert Uytterhoeven 
Signed-off-by: Greg Kroah-Hartman

nubus: Add support for the driver model

2018-01-16T15:47:29+00:00

This patch brings basic support for the Linux Driver Model to the
NuBus subsystem.

For flexibility, the matching of boards with drivers is left up to the
drivers. This is also the approach taken by NetBSD. A board may have
many functions, and drivers may have to consider many functional
resources and board resources in order to match a device.

This implementation does not bind drivers to resources (nor does it bind
many drivers to the same board). Apple's NuBus declaration ROM design
is flexible enough to allow that, but I don't see a need to support it
as we don't use the "slot zero" resources (in the main logic board ROM).

Eliminate the global nubus_boards linked list by rewriting the procfs
board iterator around bus_for_each_dev(). Hence the nubus device refcount
can be used to determine the lifespan of board objects.

Cc: Greg Kroah-Hartman 
Reviewed-by: Greg Kroah-Hartman 
Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Geert Uytterhoeven

nubus: Adopt standard linked list implementation

2018-01-16T15:47:29+00:00

This increases code re-use and improves readability.

Cc: "David S. Miller" 
Cc: Bartlomiej Zolnierkiewicz 
Acked-by: Bartlomiej Zolnierkiewicz 
Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Geert Uytterhoeven

nubus: Rename struct nubus_dev

2018-01-16T15:47:29+00:00

It is misleading to call a functional resource a "device". In adopting
the Linux Driver Model, the struct device will be embedded in struct
nubus_board. That will compound the terminlogy problem because drivers
will bind with boards, not with functional resources. Avoid this by
renaming struct nubus_dev as struct nubus_rsrc. "Functional resource"
is the vendor's terminology so this helps avoid confusion.

Cc: "David S. Miller" 
Cc: Bartlomiej Zolnierkiewicz 
Acked-by: Bartlomiej Zolnierkiewicz 
Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Geert Uytterhoeven

nubus: Rework /proc/bus/nubus/s/ implementation

2018-01-16T15:47:29+00:00

The /proc/bus/nubus/s/ directory tree for any slot s is missing a lot
of information. The struct file_operations methods have long been left
unimplemented (hence the familiar compile-time warning, "Need to set
some I/O handlers here").

Slot resources have a complex structure which varies depending on board
function. The logic for interpreting these ROM data structures is found
in nubus.c. Let's not duplicate that logic in proc.c.

Create the /proc/bus/nubus/s/ inodes while scanning slot s. During
descent through slot resource subdirectories, call the new
nubus_proc_add_foo() functions to create the procfs inodes.

Also add a new function, nubus_seq_write_rsrc_mem(), to write the
contents of a particular slot resource to a given seq_file. This is
used by the procfs file_operations methods, to finally give userspace
access to slot ROM information, such as the available video modes.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Geert Uytterhoeven

nubus: Generalize block resource handling

2018-01-16T15:47:29+00:00

Scrap the specialized code to unpack video mode name resources and
driver resources. It isn't useful.
Instead, add a re-usable function to handle lists of block resources of
any kind, and descend into the video mode table resource directory.
Rename callers as nubus_get_foo(), consistent with their purpose and
with related functions in the same file.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Geert Uytterhoeven

nubus: Remove redundant code

2018-01-16T15:47:29+00:00

Eliminate unused values from struct nubus_dev to save wasted memory
(a Radius PrecisionColor 24X card has about 95 functional resources
and up to six such cards may be fitted). Also remove redundant static
variable initialization, an unreachable !MACH_IS_MAC conditional,
the unused nubus_find_device() function, the bogus get_nubus_list()
prototype and the pointless card_present temporary variable.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Geert Uytterhoeven