The bcma driver core can be built with or without DT support, but
it fails to build when CONFIG_OF=y and CONFIG_OF_IRQ=n, which
can happen on platforms that do not support IRQ domains.

ERROR: "irq_create_of_mapping" [drivers/bcma/bcma.ko] undefined!
ERROR: "of_irq_parse_raw" [drivers/bcma/bcma.ko] undefined!
ERROR: "of_irq_parse_one" [drivers/bcma/bcma.ko] undefined!

This adds another compile-time check for OF_IRQ, but also
gets rid of now unneeded #ifdef checks: Using the simpler
IS_ENABLED() check for OF_IRQ also covers the case of not
having CONFIG_OF enabled. The check for CONFIG_OF_ADDRESS
was added to allow building on architectures without
OF_ADDRESS, but that has been addressed already in
b1d06b60 ("of: Provide static inline function for
of_translate_address if needed").
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This follows the way of handling other flashes and cleans code a bit. As
next task we will want to move flash code to ChipCommon driver as:
1) Flash controllers are accesible using ChipCommon registers
2) This code isn't MIPS specific
This change prepares bcma for that.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

So far we were using fs_initcall. It was (and still is) needed because
struct bus_type has to be registered early. However main bus
initialization has to happen later as it requires SPROM which depends on
NVRAM which depends on mtd.
Solve it by using fs_initcall only for bus_register call and module_init
for the rest. It affects bcma only when built-in obviously.

This was tested with BCM4706 and BCM5357C0 (BCM47XX), BCM4708A0
(ARCH_BCM_5301X) and BCM43225 (PCIe card with bcma as module).
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

of_default_bus_match_table was not exported earlier, so it could only
be accessed by code compiled into the kernel. A new function
of_platform_default_populate() was added which uses
of_default_bus_match_table and this function is also exported. This way
it is possible to create a bus with the content of
of_default_bus_match_table and we can remove the hacks from bcma.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

bus->host_pdev is part of a union so bus->host_pdev != NULL is probably
also true for PCIe devices, because there it accesses bus->host_pci. If
we access the dev member at the offset defined in struct
platform_device in struct pci_dev instead we probably get something
else.

This patch adds a new function which returns the host dev struct and
NULL if we do not have a host dev. When this gets registered on MIPS
brcm47xx we do not have a host dev in some situations.
This function could also be used in other places.

This problem was introduced in this commit:
commit cae761b5
Author: Rafa? Mi?ecki <zajec5@gmail.com>
Date:   Sun Jun 28 17:17:13 2015 +0200

    bcma: populate bus DT subnodes as platform_device-s
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Currently of_default_bus_match_table is not exported so we can only use
this feature when bcma is build into the kernel. This patch removes
support for child buses when bcma is build as a module as a temporary
fix for a build problem introduces in this commit:

commit cae761b5
Author: Rafał Miłecki <zajec5@gmail.com>
Date:   Sun Jun 28 17:17:13 2015 +0200

    bcma: populate bus DT subnodes as platform_device-s
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Fixes: cae761b5 ("bcma: populate bus DT subnodes as platform_device-s")
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Our bus should allow defining children nodes as we may want to specify
devices attached to the bus. This is required e.g. to specify NAND or
ChipCommon cores and use bus's address and IRQ mappings.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

There are some PCIe core fixes that need to be applied before accessing
SPROM, otherwise reading it may fail.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

Starting with kernel 3.19-rc1 early registration of bcma on MIPS is done
a bit later, with memory allocator available. This allows us to simplify
code by using standard bus scanning method.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

This moves main bus init code to the main.c and renames old function to
make its purpose clear.
Thanks to this change we'll also be able to separate scanning from
registration (and support PCIe Gen 2 devices) in the future.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

It is not possible to auto detect the irq numbers used by the cores on
an arm SoC. If bcma was registered with device tree it will search for
some device tree nodes with the irq number and add it to the core
configuration.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This moves bcma_core_irq() to main.c and add a extra parameter with a
number so that we can return different irq number for devices with more
than one.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

We were setting things like dma_dev, IRQ, etc. during core registration
only. We need such info for cores handled internally (e.g. ChipCommon)
as well.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Acked-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Commit 2101e533 ("bcma: register bcma as device tree driver")
introduces a hard dependency on OF_ADDRESS into the bcma driver.
OF_ADDRESS is specifically disabled for the sparc architecture.
This results in the following error when building sparc64:allmodconfig.

drivers/bcma/main.c: In function 'bcma_of_find_child_device':
drivers/bcma/main.c:150:3: error: implicit declaration of function 'of_translate_address'

Fixes: 2101e533 ("bcma: register bcma as device tree driver")
Reported-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This driver is used by the bcm53xx ARM SoC code. Now it is possible to
give the address of the chipcommon core in device tree and bcma will
search for all the other cores.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This core is used on BCM4708 to configure the PCIe and USB3 PHYs and it
contains the addresses to the Device Management unit. This will be used
by the PCIe driver first.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

On Northstar (ARM arch) we will use MTD subsystem to access NVRAM and
SPROM. To get access to flash device we need to register these cores
first.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Acked-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This cleans code a bit and will us to register cores in other places as
well. The only difference with this patch is using "core_index" for
setting device name.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Acked-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This change is important for SoC host. In future we will want to know
chip ID (needed for early MIPS boot) before doing cores scanning.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Acked-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

New Broadcom PCIe devices (802.11ac ones?) use Gen2 and have to be
initialized differently.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This function is used to get a specific core when there is more than
one core of that specific type. This is used in bgmac to reset all GMAC
cores.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Acked-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is required so that we give up the last reference to the device.
Signed-off-by: NLevente Kurusa <levex@linux.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The dev_attrs field of struct bus_type is going away soon, dev_groups
should be used instead.  This converts the bcma bus code to use the
correct field.
Acked-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

It is better to return the actual error code than just -1.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch unregisters the gpio chip before bcma gets unloaded.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Reported-by: NPiotr Haber <phaber@broadcom.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This bcma_find_core_unit() is needed by the mips driver in the next
patch.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

CONFIG_HOTPLUG is going away as an option.  As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, and __devexit
from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: "Rafał Miłecki" <zajec5@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Register the watchdog driver to the system if this is a SoC. Using the
watchdog on a non SoC device, like a PCIe card, will make the PCIe
card die when the timeout expired, but starting it again is not
supported by bcma.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Register a GPIO driver to access the GPIOs provided by the chip.
The GPIOs of the SoC should always start at 0 and the other GPIOs could
start at a random position. There is just one SoC in a system and when
they start at 0 the number is predictable.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4587Acked-by: NFlorian Fainelli <florian@openwrt.org>

The BCM4706 has two PCIe host controller on the bcma bus. For PCIe
client mode it is assumed that there is only one PCIe controller so the
PCIe driver, like b43 and brcmsmac are accessing the first PCIe
controller when they want to issue a operation on the host controller.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The PCIe host driver and the chip common initialisation accesses the
sprom struct, but it is not initialized when these functions are run.
Move the sprom parsing up in to do it earlier.
As we need the chip common core rev and some other attributes from the
chip common core, the early initialization is done before accessing the
sprom.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Some parts of the initialization for chip common and the pcie core are
accessing the sprom struct, but it is not initialized at that stage.
Just do the necessary thing in the early register on SoCs and not the
complete initialization to read out the nvram from the flash chip.
After it is possible to read out the nvram, the sprom should be parsed
from it and the full initialization of the cores should be run.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

When cores are unregistered, entries
need to be removed from cores list in a safe manner.
Reported-by: NStanislaw Gruszka <sgruszka@redhat.com>
Reviewed-by: NArend Van Spriel <arend@broadcom.com>
Signed-off-by: NPiotr Haber <phaber@broadcom.com>
Cc: stable@vger.kernel.org
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

bcma_scan_bus allocates a bcma_core for each core found on the bus, but the
memory for cores handled by the bcma driver itself was not being freed when
the bus was unregistered. This patch adds special handling for the PCIE,
MIPS, and GBIT COMMON cores, to ensure that their memory allocation is
freed as well.

Note that this patch doesn't address the memory allocated for the CC core,
as that was corrected in my previous patch "bcma: register cc core driver,
device."

Cc: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: NSaul St. John <saul.stjohn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>