doc: Convert serprog docs to rst and add to doc directory

Change-Id: Ie52f1e051ed215d61d5fb535e3eddeac71f64d13
Signed-off-by: Anastasia Klimchuk <aklm@flashrom.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/82018
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sydney <git@funkeleinhorn.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

doc/supported_hw/supported_prog/serprog/overview.rst

@@ -0,0 +1,83 @@
+==================
+Serprog (overview)
+==================
+
+This page collects information about the serprog protocol and the programmers implementing it.
+
+Protocol
+========
+
+See :doc:`/supported_hw/supported_prog/serprog/serprog-protocol`. It is designed to be compact and allow efficient storage in limited memory of programmer devices.
+
+AVR flasher by Urja Rannikko
+============================
+
+.. image:: 300px-Avr_rs232_programmer.jpg
+
+The Prototype RS232 AVR parallel flash programmer of Urja Rannikko was the first implementation of the serprog protocol.
+
+The source code can be found `here <https://github.com/urjaman/frser-atmega88>`_.
+
+InSystemFlasher by Juhana Helovuo
+=================================
+
+This was the first one that talks to SPI devices via serial over USB.
+Details can be found in the `coreboot wiki <https://www.coreboot.org/InSystemFlasher>`_ and in this
+`coreboot mailing list thread <https://mail.coreboot.org/pipermail/coreboot/2011-February/063349.html>`_.
+
+atmegaXXu2-flasher by Stefan Tauner
+===================================
+
+Like the InSystemFlasher this one uses LUFA on an AVR microcontroller to tunnel the serial data over USB.
+
+.. image:: 300px-AtmegaXXu2-flasher.jpg
+
+Various Arduino based flashers
+==============================
+
+Frser-duino
+-----------
+
+This project contains `source code <https://github.com/urjaman/frser-duino/>`_ to install on Arduino devices.
+
+This developer also have various ports on `github repo <https://github.com/urjaman?tab=repositories>`_ for several microcontroller boards, such as:
+
+* `frser-teensyflash <https://github.com/urjaman/frser-teensyflash>`_: A port for the teensy microcontroller board
+
+There also various other interesting projects such as:
+
+* `fast-usbserial <https://github.com/urjaman/fast-usbserial>`_: A software to make arduino with 8u2 or 16u2 flashing faster and more reliable]
+* :ref:`arduino shield`
+
+Using a 5v Arduino at 3.3V
+--------------------------
+
+Information on it can be found in this doc: :doc:`/supported_hw/supported_prog/serprog/arduino_flasher_3.3v`
+
+5V arduino with level shifter
+-----------------------------
+
+For detailed instructions on how to use different Arduino models to access SPI flash chips see :doc:`/supported_hw/supported_prog/serprog/arduino_flasher`
+
+.. image:: 300px-Serprog_0001.jpeg
+
+Teensy 3.1 SPI + LPC/FWH Flasher
+--------------------------------
+
+A Teensy 3.1 based small flasher by Urja Rannikko documented here: :doc:`/supported_hw/supported_prog/serprog/teensy_3_1`
+
+HydraBus multi-tool
+-------------------
+
+HydraBus (hardware) with HydraFW (firmware) is an open source multi-tool for learning, developing, debugging, hacking and penetration testing
+of embedded hardware. It is built upon an ARM Cortex-M4 (STM32F405). The source code for HydraFW is available
+`on GitHub <https://github.com/hydrabus/hydrafw>`_. Refer to `their GitHub Wiki <https://github.com/hydrabus/hydrafw/wiki/HydraFW-SPI-guide#flashrom-usage>`_
+for more details on how to use HydraBus with flashrom.
+
+.. image:: 300px-HydraFW_Default_PinAssignment.png
+
+stm32-vserprog by Chi Zhang
+-----------------------------
+
+A powerful option is `stm32-vserprog <https://github.com/dword1511/stm32-vserprog#stm32-vserprog>`_, a firmware for various STM32-based boards
+that turns them into serprog-based programmers with SPI clock speeds up to 36 MHz.