This drops ssb/bcma dependency and will allow us to make it a standalone
driver.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/8233/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This makes NVRAM code less bcm47xx/ssb specific allowing it to become a
standalone driver in the future. A similar patch for bcma will follow
when it's ready.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Acked-by: NHauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7612/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

We should be using ioremap_nocache helper which handles remaps in a
smarter way.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/7611/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Broadcom boards support 32 GPIOs and NVRAM may have entires for higher
ones too. Example:
gpio23=wombo_reset
Signed-off-by: NRafa? Mi?ecki <zajec5@gmail.com>
Acked-by: NHauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Cc: Rafał Miłecki <zajec5@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6547/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>.  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6320/

Move the possible nvram sizes from the stack into the data segment
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6044/

The nvram contains some gpio configuration for boards. It is stored in
a gpio<number>=name format e.g.
gpio8=wps_button
gpio4=robo_reset

This patches adds a function to parse these entries, so other driver
can use it.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5841/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The nvram functions are exported and used by some normal drivers. To
prevent name clashes with ofter parts of the kernel code add a bcm47xx_
prefix in front of the function names and the header file name.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4744/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

The old code just worked for nvram with a size of 0x8000 bytes. This
patch adds support for reading nvram from partitions of 0xF000 and
0x10000 bytes.

There is just 32KB space for the nvram, but most devices do not use the
full size and this code reads the first 32KB in that case and prints a
warning.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4743/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4742/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4741/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

This makes it possible to handle the case of not being able to read the
nvram ram. This could happen when the code searching for the specific
flash chip have not run jet.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4740/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Instead of using our own error codes use some common codes.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4739/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Also check if parallel flash is present at all before accessing it and
add support for serial flash on BCMA bus.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Acked-by: NHauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/4738/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Having received another series of whitespace patches I decided to do this
once and for all rather than dealing with this kind of patches trickling
in forever.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This is a preparing step for adding serial flash support.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch add support for the bcma bus. Broadcom uses only Mips 74K
CPUs on the new SoC and on the old ons using ssb bus there are no Mips
74K CPUs.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Acked-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Acked-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Prepare bcm47xx to support different System buses. Before adding
support for bcma it should be possible to build bcm47xx without the
need of ssb. With this patch bcm47xx does not directly contain a
ssb_bus, but a union contain all the supported system buses. As a SoC
just uses one system bus a union is a good choice.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Acked-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

We are generating the prefix based on the PCI bus address the device is
on. This is done like Broadcom does it in their code expect that the the
bus number is increased by one. In the SB bus implementation used by
Broadcom the SB bus emulates a PCI bus so the kernel sees one PCI bus
more then in our implementation. We do not handle prefixes like sb/1/
yet as they are only used on the new bus which is not implemented yet.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2364/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Nvram_getenv should behave like cfe_getenv. cfe_getenv returns 0 on
success and -9 if the value was not found. If the input was wrong -8
will be returned by cfe_getenv.  Change nvram_getenv to do the same.
Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1520/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

When trying to netboot a Linksys WRT54GS WLAN router, the bootup fails,
because of following error message:

...
[    0.424000] b44: b44.c:v2.0
[    0.424000] b44: Invalid MAC address found in EEPROM
[    0.432000] b44 ssb0:1: Problem fetching invariants of chip,aborting
[    0.436000] b44: probe of ssb0:1 failed with error -22
...

The router uses a CFE bootloader, but most of the needed environment
variables for network card initialization, are not available from CFE
via printenv and even though not via cfe_getenv().
The required environment variables are saved in a special partition
in flash memory. The attached patch implement nvram_getenv and enables
bootup via NFS root on my router.

Most of the patch is extracted from the OpenWrt subversion repository and
stripped down and cleaned up to just fix this issue.

[Ralf: sorted out header file inclusions.  Lots of unneded headers and such
that should have been included.]
Signed-off-by: NWaldemar Brodkorb <wbx@openadk.org>
Reviewed-by: NPhil Sutter <phil@nwl.cc>
To: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: http://patchwork.linux-mips.org/patch/1359/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>