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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Danny Milosavljevic <dannym@scratchpost.org>
;;; Copyright © 2021 Stefan <stefan-guix@vodafonemail.de>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages raspberry-pi)
  #:use-module (gnu bootloader)
  #:use-module (gnu bootloader grub)
  #:use-module (gnu packages)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages algebra)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bash)
  #:use-module (gnu packages bootloaders)
  #:use-module (gnu packages commencement)
  #:use-module (gnu packages cross-base)
  #:use-module (gnu packages documentation)
  #:use-module (gnu packages embedded)
  #:use-module (gnu packages file)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages linux)
  #:use-module (guix build-system copy)
  #:use-module (guix build-system gnu)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix gexp)
  #:use-module (guix store)
  #:use-module (guix monads)
  #:use-module (guix utils)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-2)
  #:use-module (srfi srfi-26)
  #:use-module (ice-9 match))

(define-public bcm2835
  (package
    (name "bcm2835")
    (version "1.64")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://www.airspayce.com/mikem/bcm2835/bcm2835-"
                    version ".tar.gz"))
              (sha256
               (base32
                "06s81540iz4vsh0cm6jwah2x0hih79v42pfa4pgr8kcbv56158h6"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f))    ; Would need to be root
    ;; doc/html docs would not be installed anyway.
    ;(native-inputs
    ; `(("doxygen" ,doxygen)))
    (synopsis "C library for Broadcom BCM 2835 as used in Raspberry Pi")
    (description "This package provides a C library for Broadcom BCM 2835 as
used in the Raspberry Pi")
    (home-page "http://www.airspayce.com/mikem/bcm2835/")
    (supported-systems '("armhf-linux" "aarch64-linux"))
    (license license:gpl3)))

(define raspi-gpio
  (let ((commit "6d0769ac04760b6e9f33b4aa1f11c682237bf368")
        (revision "1"))
    (package
      (name "raspi-gpio")
      (version (git-version "0.1" revision commit))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/RPi-Distro/raspi-gpio")
                      (commit commit)))
                (file-name (git-file-name name version))
                (sha256
                 (base32
                  "1fia1ma586hwhpda0jz86j6i55andq0wncbhzhzvhf7yc773cpi4"))))
      (build-system gnu-build-system)
      (synopsis "State dumper for BCM270x GPIOs")
      (description "Tool to help debug / hack at the BCM283x GPIO. You can dump
  the state of a GPIO or (all GPIOs). You can change a GPIO mode and pulls (and
  level if set as an output).  Beware this tool writes directly to the BCM283x
  GPIO reisters, ignoring anything else that may be using them (like Linux
  drivers).")
      (home-page "https://github.com/RPi-Distro/raspi-gpio")
      (supported-systems '("armhf-linux" "aarch64-linux"))
      (license license:bsd-3))))

(define %rpi-open-firmware-version "0.1")
(define %rpi-open-firmware-origin
  (origin
   (method git-fetch)
   (uri (git-reference
         (url "https://github.com/librerpi/rpi-open-firmware")
         (commit "6be45466e0be437a1b0b3512a86f3d9627217006")))
   (file-name "rpi-open-firmware-checkout")
   (sha256
    (base32 "1wyxvv62i3rjicg4hd94pzbgpadinnrgs27sk39md706mm0qixbh"))))

(define-public raspi-arm-chainloader
  (package
    (name "raspi-arm-chainloader")
    (version %rpi-open-firmware-version)
    (source %rpi-open-firmware-origin)
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                   ; No tests exist
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)
         (add-before 'build 'setenv
           (lambda _
             (setenv "CC" "arm-none-eabi-gcc")
             (setenv "CXX" "arm-none-eabi-g++")
             (setenv "AS" "arm-none-eabi-as")
             (setenv "OBJCOPY" "arm-none-eabi-objcopy")
             (setenv "BAREMETAL" "1")
             #t))
         (add-after 'setenv 'build-tlsf
           (lambda _
             (with-directory-excursion "tlsf"
               ;; Note: Adding "-I../common -I../notc/include".
               (invoke "make"
                       "CFLAGS=-mtune=arm1176jzf-s -march=armv6zk -mfpu=vfp -mfloat-abi=softfp -I../common -I../notc/include"))))
         (add-after 'build-tlsf 'build-common
           (lambda _
             (with-directory-excursion "common"
               (invoke "make"
                       ;; Note: Adding "-I.. -I../notc/include".
                       "ARMCFLAGS=-mtune=arm1176jzf-s -march=armv6zk -marm -I.. -I../notc/include"))))
         (add-after 'build-common 'build-notc
           (lambda _
             (with-directory-excursion "notc"
               (invoke "make"))))
         (add-after 'build-notc 'chdir
           (lambda _
             (chdir "arm_chainloader")
             (substitute* "Makefile"
              (("-I[.][.]/")
               "-I../common -I../common/include -I../notc/include -I../")
              (("-ltlsf")
               "-L../common -L../notc -L../tlsf -ltlsf"))
             #t))
         (replace 'install
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (libexec (string-append out "/libexec")))
               (mkdir-p libexec)
               (install-file "build/arm_chainloader.elf" libexec)
               (install-file "build/arm_chainloader.map" libexec)
               (install-file "build/arm_chainloader.bin" libexec)
               #t))))))
    (native-inputs
     `(("binutils" ,(cross-binutils "arm-none-eabi"))
       ("gcc" ,gcc-arm-none-eabi-6)))
    (inputs
     `())
    (synopsis "Raspberry Pi ARM bootloader")
    (description "This package provides a bootloader for the ARM part of a
Raspberry Pi.  Note: It does not work on Raspberry Pi 1.")
    (home-page "https://github.com/librerpi/rpi-open-firmware/")
    (license license:gpl2+)))

(define-public raspi-arm64-chainloader
  (package
    (inherit raspi-arm-chainloader)
    (name "raspi-arm64-chainloader")
    ;; These native-inputs especially don't contain a libc.
    (native-inputs
     `(("bash" ,bash)
       ("binutils" ,binutils)
       ("coreutils" ,coreutils)
       ("file" ,file)
       ("ld-wrapper" ,ld-wrapper)
       ("make" ,gnu-make)
       ("gcc" ,gcc-6)
       ("locales" ,glibc-utf8-locales)))
    (inputs
     `())
    (arguments
     `(#:implicit-inputs? #f
       ,@(substitute-keyword-arguments (package-arguments raspi-arm-chainloader)
         ((#:phases phases)
          `(modify-phases ,phases
             (replace 'setenv
               (lambda _
                 (setenv "AS" "as") ; TODO: as-for-target
                 (setenv "OBJCOPY" "objcopy")
                 (setenv "CC" ,(cc-for-target))
                 (setenv "CXX" ,(cc-for-target))
                 (setenv "BAREMETAL" "1")
                 #t))
             (add-after 'setenv 'build-tlsf
               (lambda _
                 (with-directory-excursion "tlsf"
                   (invoke "make"
                           "CFLAGS=-I../common -I../notc/include"))))
             (replace 'build-common
               (lambda _
                 (with-directory-excursion "common"
                   ;; Autodetection uses the CC filename for detecting the architecture.
                   ;; Since we are not using a cross-compiler, we side-step that.
                   (invoke "make"
                           "CFLAGS=-Ilib -I. -Iinclude -ffunction-sections -Wall -g -nostdlib -nostartfiles -ffreestanding -DBAREMETAL"))))
             (replace 'build-notc
               (lambda _
                 (with-directory-excursion "notc"
                   ;; Autodetection uses the CC filename for detecting the architecture.
                   ;; Since we are not using a cross-compiler, we side-step that.
                   (invoke "make"
                           "CFLAGS=-Iinclude -g"))))
             (replace 'chdir
               (lambda _
                 (chdir "arm64")
                 (substitute* "Makefile"
                  (("CFLAGS =")
                   "CFLAGS = -I../common -I../common/include -I../notc/include -I.. -DBAREMETAL")
                  (("-lcommon")
                   "-L../common -L../notc -lcommon"))
                 #t))
         (replace 'install
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (libexec (string-append out "/libexec")))
               (mkdir-p libexec)
               (install-file "arm64.elf" libexec)
               (install-file "arm64.map" libexec)
               (install-file "arm64.bin" libexec)
               #t))))))))
    (supported-systems '("aarch64-linux"))))

(define-public (raspi-config-file name content)
  "Make a configuration file like config.txt for the Raspberry Pi firmware.
CONTENT can be a list of strings, which are concatenated with a newline
character.  Alternatively CONTENT can be a string with the full file content."
  (plain-file
   name
   (if (list? content)
       (string-join content "\n" 'suffix)
       content)))

(define-public %raspi-config-txt
  ;; A config.txt file to start the ARM cores up in 64-bit mode if necessary
  ;; and to include a dtb.txt, bootloader.txt, and a custom.txt, each with
  ;; separated configurations for the Raspberry Pi firmware.
  (raspi-config-file
   "config.txt"
   `("# See https://www.raspberrypi.org/documentation/configuration/config-txt/README.md for details."
     ""
     ,(string-append "arm_64bit=" (if (target-aarch64?) "1" "0"))
     "include dtb.txt"
     "include bootloader.txt"
     "include custom.txt")))

(define-public %raspi-bcm27-dtb-txt
  ;; A dtb.txt file to be included by the config.txt to ensure that the
  ;; downstream device tree files bcm27*.dtb will be used.
  (raspi-config-file
   "dtb.txt"
   "upstream_kernel=0"))

(define-public %raspi-bcm28-dtb-txt
  ;; A dtb.txt file to be included by the config.txt to ensure that the
  ;; upstream device tree files bcm28*.dtb will be used.
  ;; This also implies the use of the dtoverlay=upstream.
  (raspi-config-file
   "dtb.txt"
   "upstream_kernel=1"))

(define-public %raspi-u-boot-bootloader-txt
  ;; A bootloader.txt file to be included by the config.txt to load the
  ;; U-Boot bootloader.
  (raspi-config-file
   "bootloader.txt"
   '("dtoverlay=upstream"
     "enable_uart=1"
     "kernel=u-boot.bin")))

(define-public (raspi-custom-txt content)
  "Make a custom.txt file for the Raspberry Pi firmware.
CONTENT can be a list of strings, which are concatenated with a newline
character.  Alternatively CONTENT can be a string with the full file content."
  (raspi-config-file "custom.txt" content))

(define-public (make-raspi-bcm28-dtbs linux)
  "Make a package with the device-tree files for Raspberry Pi models from the
kernel LINUX."
  (package
    (inherit linux)
    (name "raspi-bcm28-dtbs")
    (source #f)
    (build-system copy-build-system)
    (arguments
     `(#:phases (modify-phases %standard-phases (delete 'unpack))
       #:install-plan
       (list (list (string-append (assoc-ref %build-inputs "linux")
                                  "/lib/dtbs/broadcom/")
                   "." #:include-regexp '("/bcm....-rpi.*\\.dtb")))))
    (inputs `(("linux" ,linux)))
    (synopsis "Device-tree files for a Raspberry Pi")
    (description
     (simple-format #f "The device-tree files for Raspberry Pi models from ~a."
             (package-name linux)))))

(define-public grub-efi-bootloader-chain-raspi-64
  ;; A bootloader capable to boot a Raspberry Pi over network via TFTP or from
  ;; a local storage like a micro SD card.
  ;; It neither installs firmware nor device-tree files for the Raspberry Pi.
  ;; It just assumes them to be existing in boot/efi in the same way that some
  ;; UEFI firmware with ACPI data is usually assumed to be existing on PCs.
  ;; It creates firmware configuration files and a bootloader-chain with U-Boot
  ;; to provide an EFI API for the final GRUB bootloader.
  ;; It also serves as a blue-print to create an own bootloader-chain with
  ;; firmwre and device-tree packages or files.
  (efi-bootloader-chain grub-efi-netboot-removable-bootloader
                        #:packages (list u-boot-rpi-arm64-efi-bin)
                        #:files (list %raspi-config-txt
                                      %raspi-bcm27-dtb-txt
                                      %raspi-u-boot-bootloader-txt)))

(define (make-raspi-defconfig arch defconfig sha256-as-base32)
  "Make for the architecture ARCH a file-like object from the DEFCONFIG file
with the hash SHA256-AS-BASE32.  This object can be used as the #:defconfig
argument of the function (modify-linux)."
  (make-defconfig
   (string-append
    ;; This is from commit 7838840 on branch rpi-5.18.y,
    ;; see https://github.com/raspberrypi/linux/tree/rpi-5.18.y/
    ;; and https://github.com/raspberrypi/linux/commit/7838840b5606a2051b31da4c598466df7b1c3005
    "https://raw.githubusercontent.com/raspberrypi/linux/7838840b5606a2051b31da4c598466df7b1c3005/arch/"
    arch "/configs/" defconfig)
   sha256-as-base32))

(define-public %bcm2709-defconfig
  (make-raspi-defconfig
   "arm" "bcm2709_defconfig"
   "1hcxmsr131f92ay3bfglrggds8ajy904yj3vw7c42i4c66256a79"))

(define-public %bcm2711-defconfig
  (make-raspi-defconfig
   "arm" "bcm2711_defconfig"
   "1n7g5yq0hdp8lh0x6bfxph2ff8yn8zisdj3qg0gbn83j4v8i1zbd"))

(define-public %bcm2711-defconfig-64
  (make-raspi-defconfig
   "arm64" "bcm2711_defconfig"
   "0k9q7qvw826v2hrp49xnxnw93pnnkicwx869chvlf7i57461n4i7"))

(define-public %bcmrpi3-defconfig
  (make-raspi-defconfig
   "arm64" "bcmrpi3_defconfig"
   "1bfnl4p0ddx3200dg91kmh2pln36w95y05x1asc312kixv0jgd81"))

debug log:

solving 3d62b028ba ...
found 3d62b028ba in https://yhetil.org/guix/125F42BC-E90F-47A5-9997-7E0089AF07BF@vodafonemail.de/ ||
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	https://yhetil.org/guix/204332DD-AA02-4A31-9B48-FB3FAB9BD8F3@vodafonemail.de/
found 12a919d5c6 in https://yhetil.org/guix/125F42BC-E90F-47A5-9997-7E0089AF07BF@vodafonemail.de/ ||
	https://yhetil.org/guix/204332DD-AA02-4A31-9B48-FB3FAB9BD8F3@vodafonemail.de/
found 8949d2237a in https://git.savannah.gnu.org/cgit/guix.git
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100644 8949d2237aa5f05ab8658d3bc75a1f10f7b19ed4	gnu/packages/raspberry-pi.scm

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diff --git a/gnu/packages/raspberry-pi.scm b/gnu/packages/raspberry-pi.scm
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applying [3/3] https://yhetil.org/guix/125F42BC-E90F-47A5-9997-7E0089AF07BF@vodafonemail.de/
diff --git a/gnu/packages/raspberry-pi.scm b/gnu/packages/raspberry-pi.scm
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100644 3d62b028ba7c709fb277882d9aa3ef88eace088e	gnu/packages/raspberry-pi.scm

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