Struct Moxtet 

pub struct Moxtet {
    modules: Vec<MoxtetModule>,
    module_count: usize,
    tx_buf: [u8; 7],
    rx_buf: [u8; 7],
    irq_mask: [bool; 6],
    power_state: PowerState,
}

CZ.NIC Turris Omnia moxtet bus driver.

Register-space semantics (/bus/moxtet/reg/<idx>)

The moxtet bus has no MMIO register file: it is a software-defined FPGA bus where modules are enumerated at discovery time over SPI and addressed by their position on the shift chain. Consequently, the offset argument of BusDriver::read_reg/BusDriver::write_reg (and therefore the /bus/moxtet/reg/<idx> scheme paths) is a zero-based module index, not a byte/hex MMIO offset:

• reg/0 reads/writes the TX/RX buffer slot of module 0,
• offsets >= module_count are rejected with BusError::DeviceNotFound.

This deviates from MMIO-mapped buses where reg/<hex> is a hardware offset; it is kept for compatibility with the BusDriver trait API.

Fields

modules: Vec<MoxtetModule>

module_count: usize

tx_buf: [u8; 7]

rx_buf: [u8; 7]

irq_mask: [bool; 6]

power_state: PowerState

Implementations

impl Moxtet

pub fn new() -> Self

Creates a new instance.

pub fn discover_topology(&mut self, spi_data: &[u8])

Performs the discover topology operation.

pub fn module_read(&self, index: usize) -> Result<u8, BusError>

Performs the module read operation.

pub fn module_write(&mut self, index: usize, value: u8) -> Result<(), BusError>

Performs the module write operation.

pub fn set_irq_mask(&mut self, index: usize, masked: bool)

Sets irq mask.

Trait Implementations

impl BusDriver for Moxtet

fn name(&self) -> &str

Performs the name operation.

fn compatible(&self) -> &[&str]

Performs the compatible operation.

fn probe(&self) -> bool

Requires explicit SPI backend configuration; no auto-detect.

fn init(&mut self, _base: usize) -> Result<(), BusError>

Performs the init operation.

fn shutdown(&mut self) -> Result<(), BusError>

Performs the shutdown operation.

fn read_reg(&self, offset: usize) -> Result<u32, BusError>

Reads the RX buffer slot of the module at offset.

offset is a module index (0-based position on the shift chain), not an MMIO byte offset : see the Moxtet type docs.

fn write_reg(&mut self, offset: usize, value: u32) -> Result<(), BusError>

Writes the TX buffer slot of the module at offset.

offset is a module index (0-based position on the shift chain), not an MMIO byte offset : see the Moxtet type docs. Only the low 8 bits of value are significant: each module slot is one byte wide in the SPI frame.

fn children(&self) -> Vec<BusChild>

Performs the children operation.

fn handle_irq(&mut self) -> bool

Handles irq.

fn as_firewall(&self) -> Option<&dyn FirewallController>

Returns the optional [FirewallController] capability, if any.

fn suspend(&mut self) -> Result<(), BusError>

Performs the suspend operation.

fn resume(&mut self) -> Result<(), BusError>

Performs the resume operation.

fn error_count(&self) -> u64

Performs the error count operation.