Auto-generate linux drivers with alternative kernel interfaces

[arturum1]

This is a dependency of PR IObundle/soc-linux#6

• Add missing verilog sources for quartus modules.

• Update iob_linux_device_drivers software module.
  The new version auto-generates the peripheral's Linux kernel module with support for three alternative interfaces: /dev, sysfs, and ioctl.
  It also generates the corresponding user-space sources for each of those interfaces.

  To test this new module, setup the iob_timer core and list the generated sources with:

  make sim-run CORE=iob_timer
  tree ../../../iob_timer_V0.81/software/linux
  

• Update iob_system_linux rootfs to include a pre-compiled version of the new auto-generated iob_timer kernel module driver and associated user-space functions. It also includes three pre-compiled user-space programs to test the iob_timer driver with each interface.

[Copilot]

Pull request overview

This PR adds support for auto-generating Linux device drivers with three alternative kernel-userspace interfaces: /dev, sysfs, and ioctl. The implementation extends the iob_linux_device_drivers module to generate appropriate driver and user-space code for each interface, and updates the iob_system_linux rootfs to include pre-compiled test programs for the iob_timer peripheral.

Key Changes:

• Auto-generation of Linux kernel drivers supporting /dev, sysfs, and ioctl interfaces
• Generation of interface-specific user-space sources for each kernel interface
• Addition of missing Verilog sources for Altera/Quartus FPGA modules

Reviewed changes

Copilot reviewed 6 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
create_peripheral_device_drivers.py	Core implementation adding support for three kernel-userspace interfaces with auto-generation of driver and user-space code
iob_eth	Submodule reference update
minicom_linux_script.txt	Test script updated to test all three driver interfaces for iob_timer
device_driver_tutorial.md	Documentation updated to reference the new auto-generation capabilities
ddio_out_clkbuf.v	Added missing Verilog source for Altera DDIO output module
clk_buf_altclkctrl_0.v	Added missing Verilog source for Altera clock buffer module

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[P-Miranda]

with the commands:

cd py2hwsw/lib
make sim-run CORE=iob_timer
tree ../../../iob_timer_V0.81/software/linux

the ../../../iob_timer_V0.81/software/linux/user/Makefile
uses: riscv64-unknown-linux-gnu-gcc compiler, which is not available from py2hwsw nix-shell environment.
Not sure if this is a problem or not.

[arturum1]

the ../../../iob_timer_V0.81/software/linux/user/Makefile uses: riscv64-unknown-linux-gnu-gcc compiler, which is not available from py2hwsw nix-shell environment. Not sure if this is a problem or not.

I have been using the nix-shell environment from the iob_linux repository to compile all software related to linux, including those user-space functions.
This nix environment is also available under the iob_linux submodule at: py2hwsw/lib/iob_system/iob_system_linux/submodules/iob_linux

Running the ../../../iob_timer_V0.81/software/linux/user/Makefile from within the iob_linux's nix environment, should build the software correctly.