Rafael reported:

I get the following error from 'make modules_install' on my test boxes:

  HOSTCC  firmware/ihex2fw
/home/rafael/src/linux-2.6/firmware/ihex2fw.c:268: fatal error: opening dependency file firmware/.ihex2fw.d: Read-only file system
compilation terminated.
make[3]: *** [firmware/ihex2fw] Error 1
make[2]: *** [_modinst_post] Error 2
make[1]: *** [sub-make] Error 2
make: *** [all] Error 2

where the configuration is that the kernel is compiled on a build box
with 'make O=<destdir> -j5' and then <destdir> is mounted over NFS read-only by
each test box (full path to this directory is the same on the build box and on
the test boxes).  Then, I cd into <destdir>, run 'make modules_install' and get
the error above.

The issue turns out to be that we when we install firmware pick
up the list of firmware blobs from firmware/Makefile.
And this triggers the Makefile rules to update ihex2fw.

There were two solutions for this issue:
1) Move the list of firmware blobs to a separate file
2) Avoid ihex2fw rebuild by moving it to scripts

As I seriously beleive that the list of firmware blobs should be
done in a fundamental different way solution 2) was selected.
Reported-and-tested-by: N"Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: David Woodhouse <dwmw2@infradead.org>

Firmware blob is big endian
Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Firmware blob looks like this...
        u8 firmware_major
        u8 firmware_minor
        u8 firmware_fix
        u8 pad
        __be32 start_address
        __be32 length (total, including BSS sections to be zeroed)
        data... (in __be32 words, which is native for the firmware)
Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We store the firmware in its native big-endian form now, so the loop in
ace_copy() is modified to use be32_to_cpup() when writing it out.

We can forget the BSS,SBSS sections of the firmware, since we were
clearing all the device's RAM anyway. And the text,rodata,data sections
can all be loaded as a single chunk since they're contiguous (give or
take a few dozen bytes in between).
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Acked-by: NJes Sorensen <jes@sgi.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The card based on stv0299 or stv0288 demodulators.
Signed-off-by: NIgor M. Liplianin <liplianin@me.by>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Include firmware and protocol images in the kernel image if requested
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Firmware blob looks like this...
        __le16 load_address
        unsigned char data[]

[akpm@linux-foundation.org: include vmalloc.h]
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes http://bugzilla.kernel.org/show_bug.cgi?id=11355 by avoiding a
needless rebuild of the firmware/ihex2fw tool.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Provide a .gitignore file, and fix a typo which prevented some of the
generated binary files from being removed on 'make clean'.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
Reported-and-tested-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

We're not updating the tg3 driver to use request_firmware() yet, but a
reference to its firmware accidentally slipped in as part of commit
c4667746 ("dabusb: use request_firmware()"). Remove it again.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
Reported-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When CONFIG_EXTRA_FIRMWARE_DIR gets changed, the filename in the .S file
(which uses .incbin to include the binary) needs to change. When we
renamed the BUILTIN_FIRMWARE_DIR option to EXTRA_FIRMWARE_DIR, we forgot
to update the manual dependency in firmware/Makefile, so it was
depending on a non-existent file in include/config/
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Firmware blob looks like this...
        uint8_t  MajorVersion
        uint8_t  MinorVersion
        __le16   BuildNumber
        uint8_t  data[]
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Version number provided in first HEX record.
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Although it wasn't actually using ihex records before, we use the Intel
HEX record format for this firmware -- because that gives us a simple
way to split it into separate chunks internally as we need, without
loading each part as a separate file.
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Thanks for Jaswinder Singh for converting the firmware blob itself to ihex.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

Converted with help from Jaswinder Singh
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Acked-by: NAlan Cox <alan@redhat.com>

Since it had various regions to be loaded to separate addresses, and it
wanted to do them in fairly small chunks anyway, switch it to use the
new ihex code. Encode the start address in the first record.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Acked-by: NChas Williams <chas@cmf.nrl.navy.mil>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Acked-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Some drivers could do with using records like Intel HEX, but with each
record being larger than 256 bytes. This has been possible in the binary
representation (struct ihex_binrec) in the kernel since the beginning --
at least of the the current version of history. But we haven't been able
to represent that in the .HEX files which get converted to .fw files.

This adds a '-w' option to ihex2fw to make it interpret the first _two_
bytes of each line as the record length, instead of only one byte. And
adds makefile rules for %.H16->%.fw which use that.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Not the straight conversion to binary which objcopy can do for us, but
actually representing each record with its original {addr, length},
because some drivers need that information preserved.

Fix up 'firmware_install' to be able to build $(hostprogs-y) too.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

For 'make modules_install', install any firmware required by
the modules which are being installed.

Also add a 'make firmware_install' target which doesn't depend on the
configuration, but installs _all_ available in-kernel-tree firmware into
$(INSTALL_FW_PATH), which defaults to /lib/firmware. This is intended
for distributors to make arch-independent (and config-independent)
packages containing firmware.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

This will control whether we build firmware into the kernel image for
_every_ driver which we convert to request_firmware(), to avoid a
proliferation of 'CONFIG_XXX_FIRMWARE' options for each one.

Default to 'y' for now, which is the wrong thing to do but people seem
to be insisting on it and refusing to even review patches until it's
done. And it does preserve the existing behaviour for built-in drivers.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

This allows arbitrary firmware files to be included in the static kernel
where the firmware loader can find them without requiring userspace to
be alive.

(Updated and CONFIG_EXTRA_FIRMWARE_DIR added with lots of help from
Johannes Berg).
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>