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usb: device_next: align CDC ACM UART with Interrupt-driven UART API #75439

Merged
merged 8 commits into from
Oct 2, 2024
Merged

usb: device_next: align CDC ACM UART with Interrupt-driven UART API #75439

merged 8 commits into from
Oct 2, 2024

Commits on Oct 2, 2024

  1. doc: usb: move "Built-in functions" down and increase the heading 

    Move "Built-in functions" section down and increase the heading.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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  2. usb: device_next: align CDC ACM UART with Interrupt-driven UART API 

    Align CDC ACM UART with Interrupt-driven UART API behavior description.
Use the same flags in uart_irq_rx_ready(), uart_irq_tx_ready(), and
uart_irq_is_pending(), which are updated after each uart_irq_update()
call. Allow TX FIFO to be filled if there is space.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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  3. doc: usb: describe CDC ACM virtual UART IRQ API behavior 

    In general, it mirrors what is described in Interrupt-driven API
documentation, but here a little more explicitly and with a simplified
example, so that we can finally chisel it into the stone.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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  4. usb: device_next: align CDC ACM UART poll_out with legacy implementation 

    Apply changes in commit c152e09
("usb: device: cdc_acm: block in uart_poll_out() routine")
to the new CDC ACM UART poll_out implementation.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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  5. usb: device_next: allow fifo_fill and poll_out be used simultaneously 

    As it is still accepted practice, allow fifo_fill and poll_out to be
used simultaneously. The lock around fifo_fill was already in place.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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  6. doc: usb: add note about CDC ACM virtual UART polling API behavior 

    Add note about CDC ACM virtual UART polling API behavior.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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  7. usb: device_next: limit CDC ACM OUT transfer size to the current MPS 

    When the controller is connected to a full speed bus, regardless of
whether the controller supports high speed or not, the transfer size for
the bulk OUT endpoint should be equal to the MPS in the current
configuration.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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  8. usb: device_next: use delayable work for TX FIFO in CDC ACM 

    Use delayable work to reduce CPU load when there is no transfer flow in
the host direction. This also improves the performance of poll out, as
introduced in commit commit fed6bde
("usb: device: cdc_acm: send more than 1 byte in poll out")
for the legacy CDC ACM implementation.

Signed-off-by: Johann Fischer <[email protected]>
    @jfischer-no
    jfischer-no committed Oct 2, 2024
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