You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
1.7 KiB
Rust
50 lines
1.7 KiB
Rust
// SPDX-License-Identifier: MIT OR Apache-2.0
|
|
//
|
|
// Copyright (c) 2018-2022 Andre Richter <andre.o.richter@gmail.com>
|
|
|
|
//! Driver support.
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Public Definitions
|
|
//--------------------------------------------------------------------------------------------------
|
|
|
|
/// Driver interfaces.
|
|
pub mod interface {
|
|
/// Device Driver functions.
|
|
pub trait DeviceDriver {
|
|
/// Return a compatibility string for identifying the driver.
|
|
fn compatible(&self) -> &'static str;
|
|
|
|
/// Called by the kernel to bring up the device.
|
|
///
|
|
/// # Safety
|
|
///
|
|
/// - During init, drivers might do stuff with system-wide impact.
|
|
unsafe fn init(&self) -> Result<(), &'static str> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
/// Device driver management functions.
|
|
///
|
|
/// The `BSP` is supposed to supply one global instance.
|
|
pub trait DriverManager {
|
|
/// Return a slice of references to all `BSP`-instantiated drivers.
|
|
///
|
|
/// # Safety
|
|
///
|
|
/// - The order of devices is the order in which `DeviceDriver::init()` is called.
|
|
fn all_device_drivers(&self) -> &[&'static (dyn DeviceDriver + Sync)];
|
|
|
|
/// Initialization code that runs after driver init.
|
|
///
|
|
/// For example, device driver code that depends on other drivers already being online.
|
|
fn post_device_driver_init(&self);
|
|
|
|
/// Minimal code needed to bring up the console in QEMU (for testing only). This is often
|
|
/// less steps than on real hardware due to QEMU's abstractions.
|
|
#[cfg(feature = "test_build")]
|
|
fn qemu_bring_up_console(&self);
|
|
}
|
|
}
|