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-rw-r--r--usbh/src/pipe.rs249
1 files changed, 176 insertions, 73 deletions
diff --git a/usbh/src/pipe.rs b/usbh/src/pipe.rs
index d7b7981..08602a3 100644
--- a/usbh/src/pipe.rs
+++ b/usbh/src/pipe.rs
@@ -12,6 +12,8 @@ use pck_size::PckSize;
use status_bk::StatusBk;
use status_pipe::StatusPipe;
+use super::device::{Endpoint, TransferType};
+
use super::usbproto::*;
use atsamd_hal::target_device::usb::{
@@ -60,31 +62,47 @@ pub(crate) struct PipeTable {
impl PipeTable {
pub(crate) fn new() -> Self {
- Self {
- tbl: [PipeDesc::new(); MAX_PIPES],
- }
+ let tbl = {
+ let mut tbl: [core::mem::MaybeUninit<PipeDesc>; MAX_PIPES] =
+ unsafe { core::mem::MaybeUninit::uninit().assume_init() };
+
+ for e in &mut tbl[..] {
+ unsafe { core::ptr::write(e.as_mut_ptr(), PipeDesc::new()) }
+ }
+
+ unsafe { core::mem::transmute(tbl) }
+ };
+ Self { tbl: tbl }
}
pub(crate) fn pipe_for<'a, 'b>(
&'a mut self,
host: &'b mut usb::HOST,
- addr: u8,
- ep: u8,
+ endpoint: &Endpoint,
) -> Pipe<'a, 'b> {
// Just use two pipes for now. 0 is always for control
// endpoints, 1 for everything else.
//
// TODO: cache in-use pipes and return them without init if
// possible.
- let i = if ep == 0 { 0 } else { 1 };
+ let i = if endpoint.num == 0 { 0 } else { 1 };
let pregs = PipeRegs::from(host, i);
let pdesc = &mut self.tbl[i];
- trace!("setting paddr of pipe {} to {}:{}", i, addr, ep);
+ pregs.cfg.write(|w| {
+ let ptype = PType::from(endpoint.transfer_type) as u8;
+ unsafe { w.ptype().bits(ptype) }
+ });
+ trace!(
+ "setting paddr of pipe {} to {}:{}",
+ i,
+ endpoint.addr,
+ endpoint.num
+ );
pdesc.bank0.ctrl_pipe.write(|w| {
- w.pdaddr().set_addr(addr);
- w.pepnum().set_epnum(ep)
+ w.pdaddr().set_addr(endpoint.addr);
+ w.pepnum().set_epnum(endpoint.num)
});
Pipe {
num: i,
@@ -97,12 +115,14 @@ impl PipeTable {
// TODO: hide regs/desc fields. Needed right now for init_pipe0.
pub(crate) struct Pipe<'a, 'b> {
num: usize,
+
pub(crate) regs: PipeRegs<'b>,
pub(crate) desc: &'a mut PipeDesc,
}
impl Pipe<'_, '_> {
pub(crate) fn control_transfer<T>(
&mut self,
+ ep: &mut Endpoint,
bm_request_type: RequestType,
b_request: RequestCode,
w_value: WValue,
@@ -110,9 +130,6 @@ impl Pipe<'_, '_> {
buf: Option<&mut T>,
millis: &dyn Fn() -> usize,
) -> Result<(), PipeErr> {
- // Pipe data toggles for control pipes defined in SAMD21 data
- // sheet §32.6.3.9
-
let len = match buf {
None => 0,
_ => core::mem::size_of::<T>(),
@@ -128,8 +145,8 @@ impl Pipe<'_, '_> {
w_index: w_index,
w_length: len as u16,
};
- self.dtgl_clear();
self.send(
+ ep,
PToken::Setup,
&DataBuf::from(&mut setup_packet),
NAK_LIMIT,
@@ -139,17 +156,16 @@ impl Pipe<'_, '_> {
/*
* Data stage.
*/
- self.dtgl_set();
if let Some(b) = buf {
// TODO: data stage, has up to 5,000ms (in 500ms
// per-packet chunks) to complete. cf §9.2.6.4 of USB 2.0.
match bm_request_type.direction()? {
RequestDirection::DeviceToHost => {
- self.in_transfer(b, NAK_LIMIT, millis)?;
+ self.in_transfer(ep, b, NAK_LIMIT, millis)?;
}
RequestDirection::HostToDevice => {
- self.out_transfer(b, NAK_LIMIT, millis)?;
+ self.out_transfer(ep, b, NAK_LIMIT, millis)?;
}
}
}
@@ -159,7 +175,6 @@ impl Pipe<'_, '_> {
*/
// TODO: status stage has up to 50ms to complete. cf §9.2.6.4
// of USB 2.0.
- self.dtgl_set();
self.desc.bank0.pcksize.write(|w| {
unsafe { w.byte_count().bits(0) };
unsafe { w.multi_packet_size().bits(0) }
@@ -171,12 +186,14 @@ impl Pipe<'_, '_> {
};
trace!("dispatching status stage");
- self.dispatch_retries(token, NAK_LIMIT, millis)?;
+ self.dispatch_retries(ep, token, NAK_LIMIT, millis)?;
+
Ok(())
}
fn send(
&mut self,
+ ep: &mut Endpoint,
token: PToken,
buf: &DataBuf,
nak_limit: usize,
@@ -194,41 +211,12 @@ impl Pipe<'_, '_> {
unsafe { w.multi_packet_size().bits(0) }
});
- self.dispatch_retries(token, nak_limit, millis)
- }
-
- pub(crate) fn out_transfer<T>(
- &mut self,
- buf: &mut T,
- nak_limit: usize,
- millis: &dyn Fn() -> usize,
- ) -> Result<usize, PipeErr> {
- let db: DataBuf = buf.into();
-
- trace!("p{}: Should OUT for {}b.", self.num, db.len);
- self.desc.bank0.pcksize.write(|w| {
- unsafe { w.byte_count().bits(db.len as u16) };
- unsafe { w.multi_packet_size().bits(0) }
- });
-
- let mut bytes_sent = 0;
- while bytes_sent < db.len {
- self.desc
- .bank0
- .addr
- .write(|w| unsafe { w.addr().bits(db.ptr as u32 + bytes_sent as u32) });
- self.dispatch_retries(PToken::Out, nak_limit, millis)?;
-
- let sent = self.desc.bank0.pcksize.read().byte_count().bits() as usize;
- bytes_sent += sent;
- trace!("!! wrote {} of {}", bytes_sent, db.len);
- }
-
- Ok(bytes_sent)
+ self.dispatch_retries(ep, token, nak_limit, millis)
}
pub(crate) fn in_transfer<T>(
&mut self,
+ ep: &mut Endpoint,
buf: &mut T,
nak_limit: usize,
millis: &dyn Fn() -> usize,
@@ -259,8 +247,10 @@ impl Pipe<'_, '_> {
.addr
.write(|w| unsafe { w.addr().bits(db.ptr as u32 + bytes_received as u32) });
self.regs.statusclr.write(|w| w.bk0rdy().set_bit());
+ trace!("--- !!! regs-pre-dispatch !!! ---");
+ self.log_regs();
- self.dispatch_retries(PToken::In, nak_limit, millis)?;
+ self.dispatch_retries(ep, PToken::In, nak_limit, millis)?;
let recvd = self.desc.bank0.pcksize.read().byte_count().bits() as usize;
bytes_received += recvd;
trace!("!! read {} of {}", bytes_received, db.len);
@@ -271,7 +261,6 @@ impl Pipe<'_, '_> {
// Don't allow writing past the buffer.
assert!(bytes_received <= db.len);
}
- //self.dtgl();
self.regs.statusset.write(|w| w.pfreeze().set_bit());
if bytes_received < db.len {
@@ -288,11 +277,42 @@ impl Pipe<'_, '_> {
}
}
- fn dtgl_set(&mut self) {
+ pub(crate) fn out_transfer<T>(
+ &mut self,
+ ep: &mut Endpoint,
+ buf: &mut T,
+ nak_limit: usize,
+ millis: &dyn Fn() -> usize,
+ ) -> Result<usize, PipeErr> {
+ let db: DataBuf = buf.into();
+
+ trace!("p{}: Should OUT for {}b.", self.num, db.len);
+ self.desc.bank0.pcksize.write(|w| {
+ unsafe { w.byte_count().bits(db.len as u16) };
+ unsafe { w.multi_packet_size().bits(0) }
+ });
+
+ let mut bytes_sent = 0;
+ while bytes_sent < db.len {
+ self.desc
+ .bank0
+ .addr
+ .write(|w| unsafe { w.addr().bits(db.ptr as u32 + bytes_sent as u32) });
+ self.dispatch_retries(ep, PToken::Out, nak_limit, millis)?;
+
+ let sent = self.desc.bank0.pcksize.read().byte_count().bits() as usize;
+ bytes_sent += sent;
+ trace!("!! wrote {} of {}", bytes_sent, db.len);
+ }
+
+ Ok(bytes_sent)
+ }
+
+ pub(crate) fn dtgl_set(&mut self) {
self.regs.statusset.write(|w| w.dtgl().set_bit());
}
- fn dtgl_clear(&mut self) {
+ pub(crate) fn dtgl_clear(&mut self) {
self.regs.statusclr.write(|w| unsafe {
// No function for this. FIXME: need to patch the SVD for
// PSTATUSCLR.DTGL at bit0. No? This is in the SVD, but
@@ -301,20 +321,27 @@ impl Pipe<'_, '_> {
});
}
- fn dtgl(&mut self) {
+ pub(crate) fn dtgl(&mut self, ep: &mut Endpoint, token: PToken) {
// TODO: this makes no sense to me, and docs are unclear. If
// the status bit is set, set it again? if it's clear then
// clear it? This is what I get for having to work from
// Arduino sources.
trace!(
- "~~~ curbk: {}, dtgl: {}",
- self.regs.status.read().curbk().bit(),
- self.regs.status.read().dtgl().bit()
+ "~~~ tok: {:?}, dtgl: {}, i: {}, o: {}",
+ token,
+ self.regs.status.read().dtgl().bit(),
+ ep.in_toggle,
+ ep.out_toggle,
);
if self.regs.status.read().dtgl().bit_is_set() {
+ self.dtgl_clear();
+ } else {
self.dtgl_set();
+ }
+ if token == PToken::In {
+ ep.in_toggle = self.regs.status.read().dtgl().bit_is_set()
} else {
- self.dtgl_clear();
+ ep.out_toggle = self.regs.status.read().dtgl().bit_is_set()
}
}
@@ -323,31 +350,40 @@ impl Pipe<'_, '_> {
// non-blocking.
fn dispatch_retries(
&mut self,
+ ep: &mut Endpoint,
token: PToken,
retries: usize,
millis: &dyn Fn() -> usize,
) -> Result<(), PipeErr> {
- self.dispatch_packet(token);
+ self.dispatch_packet(ep, token);
let until = millis() + USB_TIMEOUT;
let mut last_err = PipeErr::SWTimeout;
let mut naks = 0;
while millis() < until {
- match self.dispatch_result(token) {
- Ok(true) => return Ok(()),
+ let res = self.dispatch_result(token);
+ match res {
+ Ok(true) => {
+ if token == PToken::In {
+ ep.in_toggle = self.regs.status.read().dtgl().bit_is_set();
+ } else if token == PToken::Out {
+ ep.out_toggle = self.regs.status.read().dtgl().bit_is_set();
+ }
+ return Ok(());
+ }
Ok(false) => continue,
Err(e) => {
last_err = e;
match last_err {
- PipeErr::DataToggle => self.dtgl(),
+ PipeErr::DataToggle => self.dtgl(ep, token),
PipeErr::Stall => break,
_ => {
naks += 1;
if naks > retries {
break;
} else {
- self.dispatch_packet(token);
+ self.dispatch_packet(ep, token);
}
}
}
@@ -358,46 +394,105 @@ impl Pipe<'_, '_> {
Err(last_err)
}
- fn dispatch_packet(&mut self, token: PToken) {
+ fn dispatch_packet(&mut self, ep: &mut Endpoint, token: PToken) {
self.regs
.cfg
.modify(|_, w| unsafe { w.ptoken().bits(token as u8) });
-
- trace!("initial regs");
- self.log_regs();
+ self.regs.intflag.modify(|_, w| w.trfail().set_bit());
+ self.regs.intflag.modify(|_, w| w.perr().set_bit());
match token {
PToken::Setup => {
self.regs.intflag.write(|w| w.txstp().set_bit());
self.regs.statusset.write(|w| w.bk0rdy().set_bit());
+
+ // Toggles should be 1 for host and function's
+ // sequence at end of setup transaction. cf §8.6.1 of
+ // USB 2.0.
+ self.dtgl_clear();
+ ep.in_toggle = true;
+ ep.out_toggle = true;
+ }
+ PToken::In => {
+ self.regs.statusclr.write(|w| w.bk0rdy().set_bit());
+ if ep.in_toggle {
+ self.dtgl_set();
+ } else {
+ self.dtgl_clear();
+ }
}
- PToken::In => self.regs.statusclr.write(|w| w.bk0rdy().set_bit()),
PToken::Out => {
self.regs.intflag.write(|w| w.trcpt0().set_bit());
self.regs.statusset.write(|w| w.bk0rdy().set_bit());
+ if ep.out_toggle {
+ self.dtgl_set();
+ } else {
+ self.dtgl_clear();
+ }
}
_ => {}
}
+
+ trace!("initial regs");
+ self.log_regs();
+
self.regs.statusclr.write(|w| w.pfreeze().set_bit());
}
+ #[cfg(not(feature = "foo"))]
fn dispatch_result(&mut self, token: PToken) -> Result<bool, PipeErr> {
if self.is_transfer_complete(token)? {
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
+ Ok(true)
+ } else if self.regs.intflag.read().trfail().bit_is_set() {
+ self.regs.intflag.write(|w| w.trfail().set_bit());
+ trace!("trfail");
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
+ self.log_regs();
+ Err(PipeErr::TransferFail)
+ } else if self.desc.bank0.status_bk.read().errorflow().bit_is_set() {
+ trace!("errorflow");
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
+ self.log_regs();
+ Err(PipeErr::Flow)
+ } else if self.desc.bank0.status_pipe.read().touter().bit_is_set() {
+ trace!("touter");
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
+ self.log_regs();
+ Err(PipeErr::HWTimeout)
+ } else if self.desc.bank0.status_pipe.read().dtgler().bit_is_set() {
+ trace!("dtgler");
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
+ self.log_regs();
+ Err(PipeErr::DataToggle)
+ } else {
+ // Nothing wrong, but not done yet.
+ Ok(false)
+ }
+ }
+
+ #[cfg(feature = "foo")]
+ fn dispatch_result(&mut self, token: PToken) -> Result<bool, PipeErr> {
+ if self.is_transfer_complete(token)? {
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
Ok(true)
} else if self.regs.intflag.read().stall().bit_is_set() {
warn!("stall");
self.log_regs();
self.regs.intflag.write(|w| w.stall().set_bit());
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
Err(PipeErr::Stall)
} else if self.regs.intflag.read().trfail().bit_is_set() {
warn!("trfail");
self.log_regs();
self.regs.intflag.write(|w| w.trfail().set_bit());
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
Err(PipeErr::TransferFail)
} else if self.regs.intflag.read().perr().bit_is_set() {
warn!("perr");
self.log_regs();
self.regs.intflag.write(|w| w.perr().set_bit());
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
Err(PipeErr::PipeErr)
} else if self.desc.bank0.status_bk.read().errorflow().bit_is_set() {
warn!("errorflow");
@@ -406,6 +501,7 @@ impl Pipe<'_, '_> {
.bank0
.status_bk
.write(|w| w.errorflow().clear_bit());
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
Err(PipeErr::Flow)
} else if self.desc.bank0.status_pipe.read().touter().bit_is_set() {
warn!("touter");
@@ -414,6 +510,7 @@ impl Pipe<'_, '_> {
.bank0
.status_pipe
.write(|w| w.touter().clear_bit());
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
Err(PipeErr::HWTimeout)
} else if self.desc.bank0.status_pipe.read().dtgler().bit_is_set() {
warn!("dtgler");
@@ -422,6 +519,7 @@ impl Pipe<'_, '_> {
.bank0
.status_pipe
.write(|w| w.dtgler().clear_bit());
+ self.regs.statusset.write(|w| w.pfreeze().set_bit());
Err(PipeErr::DataToggle)
} else {
// Nothing wrong, but not done yet.
@@ -434,7 +532,6 @@ impl Pipe<'_, '_> {
PToken::Setup => {
if self.regs.intflag.read().txstp().bit_is_set() {
self.regs.intflag.write(|w| w.txstp().set_bit());
- self.regs.statusset.write(|w| w.pfreeze().set_bit());
Ok(true)
} else {
Ok(false)
@@ -443,7 +540,6 @@ impl Pipe<'_, '_> {
PToken::In => {
if self.regs.intflag.read().trcpt0().bit_is_set() {
self.regs.intflag.write(|w| w.trcpt0().set_bit());
- self.regs.statusset.write(|w| w.pfreeze().set_bit());
Ok(true)
} else {
Ok(false)
@@ -452,7 +548,6 @@ impl Pipe<'_, '_> {
PToken::Out => {
if self.regs.intflag.read().trcpt0().bit_is_set() {
self.regs.intflag.write(|w| w.trcpt0().set_bit());
- self.regs.statusset.write(|w| w.pfreeze().set_bit());
Ok(true)
} else {
Ok(false)
@@ -518,6 +613,16 @@ pub(crate) enum PType {
_Reserved0 = 0x06,
_Reserved1 = 0x07,
}
+impl From<TransferType> for PType {
+ fn from(v: TransferType) -> Self {
+ match v {
+ TransferType::Control => Self::Control,
+ TransferType::Isochronous => Self::ISO,
+ TransferType::Bulk => Self::Bulk,
+ TransferType::Interrupt => Self::Interrupt,
+ }
+ }
+}
struct DataBuf<'a> {
ptr: *mut u8,
@@ -630,7 +735,6 @@ impl<'a> PipeRegs<'a> {
}
// §32.8.7.1
-#[derive(Clone, Copy, Debug)]
pub(crate) struct PipeDesc {
pub bank0: BankDesc,
pub bank1: BankDesc,
@@ -646,7 +750,6 @@ impl PipeDesc {
}
}
-#[derive(Clone, Copy, Debug)]
#[repr(C, packed)]
// 16 bytes per bank.
pub(crate) struct BankDesc {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 23:06:50 +0000