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path: root/chip/stm32/usart_rx_interrupt.c
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* tree: Use new atomic_* implementationDawid Niedzwiecki2020-10-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | It is done as a part of porting to Zephyr. Since the implementation of atomic functions is done for all architectures use atomic_* instead of deprecated_atomic_*. Sometimes there was a compilation error "discards 'volatile' qualifier" due to dropping "volatile" in the argument of the functions, thus some pointers casts need to be made. It shouldn't cause any issues, because we are sure about generated asm (store operation will be performed). BUG=b:169151160 BRANCH=none TEST=buildall Signed-off-by: Dawid Niedzwiecki <dn@semihalf.com> Change-Id: I98f590c323c3af52035e62825e8acfa358e0805a Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2478949 Tested-by: Jett Rink <jettrink@chromium.org> Reviewed-by: Jett Rink <jettrink@chromium.org> Reviewed-by: Tom Hughes <tomhughes@chromium.org>
* tree: rename atomic_* functions to deprecated_atomic_*Jack Rosenthal2020-09-291-1/+1
| | | | | | | | | | | | | | | | We will move to an API compatible with Zephyr's API. See the bug for complete rationale and plan. BUG=b:169151160 BRANCH=none TEST=buildall Signed-off-by: Jack Rosenthal <jrosenth@chromium.org> Change-Id: Id611f663446abf00b24298a669f2ae47fef7f632 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2427507 Tested-by: Dawid Niedźwiecki <dn@semihalf.com> Reviewed-by: Tom Hughes <tomhughes@chromium.org> Reviewed-by: Jett Rink <jettrink@chromium.org>
* LICENSE: remove unnecessary (c) after CopyrightTom Hughes2019-06-191-1/+1
| | | | | | | | | | | | | | | | Ran the following command: git grep -l 'Copyright (c)' | \ xargs sed -i 's/Copyright (c)/Copyright/g' BRANCH=none BUG=none TEST=make buildall -j Change-Id: I6cc4a0f7e8b30d5b5f97d53c031c299f3e164ca7 Signed-off-by: Tom Hughes <tomhughes@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1663262 Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org> Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
* USART: Add DMA based receiverAnton Staaf2015-08-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | This DMA receiver uses a separate small circular buffer to DMA into. This allows the DMA transaction to be made circular, and thus it does not require the interrupt latency to be low enough to setup the next transfer before the next character comes in. Additional diagnostics output have been added to the usart_info console command to facilitate tuning of the FIFO size. Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None TEST=make buildall -j Verify DMA works by cross connecting two discovery boards Change-Id: Idcdf95a47fadf21ec2154f0c9128cd3586e568ec Reviewed-on: https://chromium-review.googlesource.com/292870 Tested-by: Anton Staaf <robotboy@chromium.org> Reviewed-by: Anton Staaf <robotboy@chromium.org> Commit-Queue: Anton Staaf <robotboy@chromium.org> Trybot-Ready: Anton Staaf <robotboy@chromium.org>
* USART: Split RX driver between L and F familiesAnton Staaf2015-08-101-9/+9
| | | | | | | | | | | | | | | | | | | | The USART peripheral in the L and F families is different enough to need different receive drivers. In particular, the L family USART perihperal has no way of disabling the overflow error bit. So for that family we check and clear the bit, and keep a count of overflows. Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None TEST=make buildall -j Change-Id: Iea26c242d5177afd552a3bd4d6ab1a9c7a65f90e Reviewed-on: https://chromium-review.googlesource.com/288978 Trybot-Ready: Anton Staaf <robotboy@chromium.org> Tested-by: Anton Staaf <robotboy@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Anton Staaf <robotboy@chromium.org>
* Atomic: Mark the modified uint32_t volatileAnton Staaf2015-07-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | The atomic_* functions are often used in contexts where the data they will operate on are volatile (due to being shared between tasks or a task and an interrupt handler). Adding volatile here makes using the atomic_* functions a little easier in those cases and removes a cast from the call sites (which could be obscuring a bug, if for instance the variable was modified to be a uint16_t). Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None TEST=make buildall -j Change-Id: I71356eb3cf2c0506df38532eee767c7d78f9240e Reviewed-on: https://chromium-review.googlesource.com/287516 Trybot-Ready: Anton Staaf <robotboy@chromium.org> Tested-by: Anton Staaf <robotboy@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org> Commit-Queue: Anton Staaf <robotboy@chromium.org>
* USART: Add flexibility needed to support DMAAnton Staaf2015-07-151-0/+48
In order to support DMA transfers in one or both directions the usart driver needs to be configurable with producer/consumer operations and interrupt handler functions. These are now packaged up in the usart_rx and usart_tx structs, and versions for interrupt driven RX and TX are provided. Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None TEST=make buildall -j Change-Id: I3fd14c675c90873e903195b8e20d2070d2eda5ac Reviewed-on: https://chromium-review.googlesource.com/285023 Trybot-Ready: Anton Staaf <robotboy@chromium.org> Tested-by: Anton Staaf <robotboy@chromium.org> Reviewed-by: Todd Broch <tbroch@chromium.org> Tested-by: Todd Broch <tbroch@chromium.org> Commit-Queue: Anton Staaf <robotboy@chromium.org>
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