74 lines
1.3 KiB
Rust
74 lines
1.3 KiB
Rust
#[cfg(bdma)]
|
|
mod bdma;
|
|
#[cfg(dma)]
|
|
mod dma;
|
|
#[cfg(dmamux)]
|
|
mod dmamux;
|
|
|
|
#[cfg(dmamux)]
|
|
pub use dmamux::*;
|
|
|
|
use core::future::Future;
|
|
use embassy::util::Unborrow;
|
|
|
|
#[cfg(any(bdma_v2, dma_v2, dmamux))]
|
|
pub type Request = u8;
|
|
#[cfg(not(any(bdma_v2, dma_v2, dmamux)))]
|
|
pub type Request = ();
|
|
|
|
pub(crate) mod sealed {
|
|
pub trait Channel {}
|
|
}
|
|
|
|
pub trait Channel: sealed::Channel {
|
|
type ReadFuture<'a>: Future<Output = ()> + 'a
|
|
where
|
|
Self: 'a;
|
|
|
|
type WriteFuture<'a>: Future<Output = ()> + 'a
|
|
where
|
|
Self: 'a;
|
|
|
|
fn read<'a>(
|
|
&'a mut self,
|
|
request: Request,
|
|
src: *mut u8,
|
|
buf: &'a mut [u8],
|
|
) -> Self::ReadFuture<'a>;
|
|
|
|
fn write<'a>(
|
|
&'a mut self,
|
|
request: Request,
|
|
buf: &'a [u8],
|
|
dst: *mut u8,
|
|
) -> Self::WriteFuture<'a>;
|
|
|
|
fn write_x<'a>(
|
|
&'a mut self,
|
|
request: Request,
|
|
word: &u8,
|
|
num: usize,
|
|
dst: *mut u8,
|
|
) -> Self::WriteFuture<'a>;
|
|
}
|
|
|
|
pub struct NoDma;
|
|
|
|
unsafe impl Unborrow for NoDma {
|
|
type Target = NoDma;
|
|
|
|
unsafe fn unborrow(self) -> Self::Target {
|
|
self
|
|
}
|
|
}
|
|
|
|
// safety: must be called only once at startup
|
|
pub(crate) unsafe fn init() {
|
|
#[cfg(bdma)]
|
|
bdma::init();
|
|
#[cfg(dma)]
|
|
dma::init();
|
|
#[cfg(dmamux)]
|
|
dmamux::init();
|
|
}
|