linux-firmware: replace machine override with new recipes

Raspberry Pi hardware requires firmware that supersedes or is not
present in the standard linux-firmware distribution.  These files are
maintained in the RPi-Distro project on github.

Several attempts have been made to reconcile conflicts between what's in
linux-firmware and what the hardware needs.  The existing approach is
functional but not maintainable since it combines material from three
repositories into a single package that claims to be linux-firmware.

Remove the appends that change the content of linux-firmware for rpi
hardware.  Add two new recipes that follow the RPi-Distro repositories:

* firmware-nonfree which forked from linux-firmware and replaces
  content is provided as linux-firmware-rpidistro;
* bluez-firmware which forked from (very old) bluez and adds content is
  provided as bluez-firmware-rpidistro.

The packages are named to make clear that these come from RPi-Distro,
rather than generic sources.  Licensing attempts to record the state of
licensing as documented in RPi-Distro.

Resolves: #298
Signed-off-by: Peter A. Bigot <pab@pabigot.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/recipes-kernel/bluez-firmware-rpidistro/bluez-firmware-rpidistro_git.bb b/recipes-kernel/bluez-firmware-rpidistro/bluez-firmware-rpidistro_git.bb
new file mode 100644
index 0000000..b16b2c1
--- /dev/null
+++ b/recipes-kernel/bluez-firmware-rpidistro/bluez-firmware-rpidistro_git.bb
@@ -0,0 +1,84 @@
+SUMMARY = "Linux kernel Bluetooth firmware files from Raspbian distribution"
+DESCRIPTION = "Updated Bluetooth firmware files for RaspberryPi hardware. \
+RPi-Distro obtains these directly from Cypress; they are not submitted \
+to linux-firmware for general use."
+HOMEPAGE = "https://github.com/RPi-Distro/bluez-firmware"
+SECTION = "kernel"
+
+# Upstream has provided[^1] licensing information in the Debian
+# copyright file.  The wording of the Cypress license subsequently
+# changed in linux-firmware.
+#
+# Rather than make assumptions about what's supposed to be what, we'll
+# use the license implied by the source of these files, named to avoid
+# conflicts with linux-firmware.
+#
+# [^1]: https://github.com/RPi-Distro/bluez-firmware/issues/1
+LICENSE = "Firmware-cypress-rpidistro"
+LIC_FILES_CHKSUM = "\
+    file://LICENCE.cypress-rpidistro;md5=852f9d10cbedba1f6c439729bd0617b4 \
+"
+
+# These are not common licenses, set NO_GENERIC_LICENSE for them
+# so that the license files will be copied from fetched source
+NO_GENERIC_LICENSE[Firmware-cypress-rpidistro] = "LICENCE.cypress-rpidistro"
+
+SRC_URI = "git://github.com/RPi-Distro/bluez-firmware"
+SRCREV = "ade2bae1aaaebede09abb8fb546f767a0e4c7804"
+PV = "0.0+git${SRCPV}"
+
+S = "${WORKDIR}/git"
+
+inherit allarch
+
+CLEANBROKEN = "1"
+
+do_extract_lic() {
+    # Extract the license from the Debian copyright file
+    sed -e '1,23d' ${S}/debian/copyright > ${S}/LICENCE.cypress-rpidistro
+}
+# Must be before both do_install and do_populate_lic.  Putting it before
+# their common ancestor works; other approaches do not.
+addtask extract_lic after do_unpack before do_patch
+
+do_compile() {
+    :
+}
+
+do_install() {
+    install -d ${D}${nonarch_base_libdir}/firmware/brcm
+
+    cp LICENCE.cypress-rpidistro ${D}${nonarch_base_libdir}/firmware
+    install -m 0644 broadcom/BCM434*.hcd ${D}${nonarch_base_libdir}/firmware/brcm/
+}
+
+PACKAGES = "\
+    ${PN}-cypress-license \
+    ${PN}-bcm43430a1-hcd \
+    ${PN}-bcm4345c0-hcd \
+"
+
+LICENSE_${PN}-bcm43430a1-hcd = "Firmware-cypress-rpidistro"
+LICENSE_${PN}-bcm4345c0-hcd = "Firmware-cypress-rpidistro"
+LICENSE_${PN}-cypress-license = "Firmware-cypress-rpidistro"
+
+FILES_${PN}-cypress-license = "\
+    ${nonarch_base_libdir}/firmware/LICENCE.cypress-rpidistro \
+"
+FILES_${PN}-bcm43430a1-hcd = "\
+    ${nonarch_base_libdir}/firmware/brcm/BCM43430A1.hcd \
+"
+FILES_${PN}-bcm4345c0-hcd = "\
+    ${nonarch_base_libdir}/firmware/brcm/BCM4345C0.hcd \
+"
+
+RDEPENDS_${PN}-bcm43430a1-hcd += "${PN}-cypress-license"
+RDEPENDS_${PN}-bcm4345c0-hcd += "${PN}-cypress-license"
+RCONFLICTS_${PN}-bcm43430a1-hcd = "linux-firmware-bcm43430a1-hcd"
+RREPLACES_${PN}-bcm43430a1-hcd = "linux-firmware-bcm43430a1-hcd"
+RCONFLICTS_${PN}-bcm43435c0-hcd = "linux-firmware-bcm4345c0-hcd"
+RREPLACES_${PN}-bcm43435c0-hcd = "linux-firmware-bcm4345c0-hcd"
+
+# Firmware files are generally not run on the CPU, so they can be
+# allarch despite being architecture specific
+INSANE_SKIP = "arch"