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ChibiOS/os/hal/ports/sandbox/hal_sio_lld.c

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/*
ChibiOS - Copyright (C) 2006..2021 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file sandbox/hal_sio_lld.c
* @brief Sandbox SIO subsystem low level driver source.
*
* @addtogroup SIO
* @{
*/
#include "hal.h"
#if (HAL_USE_SIO == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/**
* @brief VUART1 SIO driver identifier.
*/
#if (SB_SIO_USE_VUART1 == TRUE) || defined(__DOXYGEN__)
SIODriver SIOD1;
#endif
/**
* @brief VUART2 SIO driver identifier.
*/
#if (SB_SIO_USE_VUART2 == TRUE) || defined(__DOXYGEN__)
SIODriver SIOD2;
#endif
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/**
* @brief Driver default configuration.
*/
static const SIOConfig default_config = {
.ncfg = 0U
};
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
__attribute__((always_inline))
static inline uint32_t __sio_vuart_init(uint32_t nvuart, uint32_t ncfg) {
__syscall3r(201, SB_VUART_INIT, nvuart, ncfg);
return (uint32_t)r0;
}
__attribute__((always_inline))
static inline uint32_t __sio_vuart_deinit(uint32_t nvuart) {
__syscall2r(201, SB_VUART_INIT, nvuart);
return (uint32_t)r0;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
#if SB_SIO_USE_VUART1 || defined(__DOXYGEN__)
#if !defined(SB_VUART1_SUPPRESS_ISR)
OSAL_IRQ_HANDLER(MK_VECTOR(SB_SIO_VUART1_IRQ)) {
sio_lld_serve_interrupt(&SIOD1);
}
#endif
#endif
#if SB_SIO_USE_VUART2 || defined(__DOXYGEN__)
#if !defined(SB_VUART2_SUPPRESS_ISR)
OSAL_IRQ_HANDLER(MK_VECTOR(SB_SIO_VUART2_IRQ)) {
sio_lld_serve_interrupt(&SIOD2);
}
#endif
#endif
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level SIO driver initialization.
*
* @notapi
*/
void sio_lld_init(void) {
/* Driver instances initialization.*/
#if SB_SIO_USE_VUART1 == TRUE
sioObjectInit(&SIOD1);
SIOD1.nvuart = 0U;
__sb_vrq_seten(1U << SB_SIO_VUART1_IRQ);
#endif
#if SB_SIO_USE_VUART2 == TRUE
sioObjectInit(&SIOD2);
SIOD2.nvuart = 1U;
__sb_vrq_seten(1U << SB_SIO_VUART2_IRQ);
#endif
}
/**
* @brief Configures and activates the SIO peripheral.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The operation status.
*
* @notapi
*/
msg_t sio_lld_start(SIODriver *siop) {
msg_t msg = HAL_RET_SUCCESS;
/* Using the default configuration if the application passed a
NULL pointer.*/
if (siop->config == NULL) {
siop->config = &default_config;
}
if (siop->state == SIO_STOP) {
/* Enables the peripheral.*/
if (false) {
}
#if SB_SIO_USE_VUART1 == TRUE
else if (&SIOD1 == siop) {
msg = (msg_t)__sio_vuart_init(siop->nvuart, siop->config->ncfg);
}
#endif
#if SB_SIO_USE_VUART2 == TRUE
else if (&SIOD2 == siop) {
msg = (msg_t)__sio_vuart_init(siop->nvuart, siop->config->ncfg);
}
#endif
else {
osalDbgAssert(false, "invalid SIO instance");
}
}
/* Configures the peripheral.*/
return msg;
}
/**
* @brief Deactivates the SIO peripheral.
*
* @param[in] siop pointer to the @p SIODriver object
*
* @notapi
*/
void sio_lld_stop(SIODriver *siop) {
msg_t msg = HAL_RET_SUCCESS;
if (siop->state == SIO_READY) {
/* Disables the peripheral.*/
if (false) {
}
#if SB_SIO_USE_VUART1 == TRUE
else if (&SIOD1 == siop) {
msg = __sio_vuart_deinit(siop->nvuart);
}
#endif
#if SB_SIO_USE_VUART2 == TRUE
else if (&SIOD2 == siop) {
msg = __sio_vuart_deinit(siop->nvuart);
}
#endif
else {
osalDbgAssert(false, "invalid SIO instance");
}
}
osalDbgAssert(msg = HAL_RET_SUCCESS, "unexpected failure");
}
/**
* @brief Determines the state of the RX FIFO.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The RX FIFO state.
* @retval false if RX FIFO is not empty
* @retval true if RX FIFO is empty
*
* @notapi
*/
bool sio_lld_is_rx_empty(SIODriver *siop) {
__syscall2rr(201, SB_VUART_ISRXE, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (bool)r1;
}
/**
* @brief Determines the activity state of the receiver.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The RX activity state.
* @retval false if RX is in active state.
* @retval true if RX is in idle state.
*
* @notapi
*/
bool sio_lld_is_rx_idle(SIODriver *siop) {
__syscall2rr(201, SB_VUART_ISRXI, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (bool)r1;
}
/**
* @brief Determines if RX has pending error events to be read and cleared.
* @note Only error and protocol errors are handled, data events are not
* considered.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The RX error events.
* @retval false if RX has no pending events
* @retval true if RX has pending events
*
* @notapi
*/
bool sio_lld_has_rx_errors(SIODriver *siop) {
__syscall2rr(201, SB_VUART_HASERR, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (bool)r1;
}
/**
* @brief Determines the state of the TX FIFO.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The TX FIFO state.
* @retval false if TX FIFO is not full
* @retval true if TX FIFO is full
*
* @notapi
*/
bool sio_lld_is_tx_full(SIODriver *siop) {
__syscall2rr(201, SB_VUART_ISTXF, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (bool)r1;
}
/**
* @brief Determines the transmission state.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The TX FIFO state.
* @retval false if transmission is idle
* @retval true if transmission is ongoing
*
* @notapi
*/
bool sio_lld_is_tx_ongoing(SIODriver *siop) {
__syscall2rr(201, SB_VUART_ISTXO, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (bool)r1;
}
/**
* @brief Enable flags change notification.
*
* @param[in] siop pointer to the @p SIODriver object
*/
void sio_lld_update_enable_flags(SIODriver *siop) {
__syscall3r(201, SB_VUART_WREN, siop->nvuart, siop->enabled);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
}
/**
* @brief Get and clears SIO error event flags.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The pending event flags.
*
* @notapi
*/
sioevents_t sio_lld_get_and_clear_errors(SIODriver *siop) {
__syscall2r(201, SB_VUART_GCERR, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (sioevents_t)r1;
}
/**
* @brief Get and clears SIO event flags.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The pending event flags.
*
* @notapi
*/
sioevents_t sio_lld_get_and_clear_events(SIODriver *siop) {
__syscall2r(201, SB_VUART_GCEVT, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (sioevents_t)r1;
}
/**
* @brief Returns pending SIO event flags.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The pending event flags.
*
* @notapi
*/
sioevents_t sio_lld_get_events(SIODriver *siop) {
__syscall2r(201, SB_VUART_GEVT, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (sioevents_t)r1;
}
/**
* @brief Reads data from the RX FIFO.
* @details The function is not blocking, it writes frames until there
* is space available without waiting.
*
* @param[in] siop pointer to an @p SIODriver structure
* @param[in] buffer pointer to the buffer for read frames
* @param[in] n maximum number of frames to be read
* @return The number of frames copied from the buffer.
* @retval 0 if the TX FIFO is full.
*/
size_t sio_lld_read(SIODriver *siop, uint8_t *buffer, size_t n) {
__syscall4rr(201, SB_VUART_READ, siop->nvuart, buffer, n);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (size_t)r1;
}
/**
* @brief Writes data into the TX FIFO.
* @details The function is not blocking, it writes frames until there
* is space available without waiting.
*
* @param[in] siop pointer to an @p SIODriver structure
* @param[in] buffer pointer to the buffer for read frames
* @param[in] n maximum number of frames to be written
* @return The number of frames copied from the buffer.
* @retval 0 if the TX FIFO is full.
*/
size_t sio_lld_write(SIODriver *siop, const uint8_t *buffer, size_t n) {
__syscall4rr(201, SB_VUART_WRITE, siop->nvuart, buffer, n);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (size_t)r1;
}
/**
* @brief Returns one frame from the RX FIFO.
* @note If the FIFO is empty then the returned value is unpredictable.
*
* @param[in] siop pointer to the @p SIODriver object
* @return The frame from RX FIFO.
*
* @notapi
*/
msg_t sio_lld_get(SIODriver *siop) {
__syscall2rr(201, SB_VUART_GET, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (size_t)r1;
}
/**
* @brief Pushes one frame into the TX FIFO.
* @note If the FIFO is full then the behavior is unpredictable.
*
* @param[in] siop pointer to the @p SIODriver object
* @param[in] data frame to be written
*
* @notapi
*/
void sio_lld_put(SIODriver *siop, uint_fast16_t data) {
__syscall3r(201, SB_VUART_PUT, siop->nvuart, data);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
}
/**
* @brief Control operation on a serial port.
*
* @param[in] siop pointer to the @p SIODriver object
* @param[in] operation control operation code
* @param[in,out] arg operation argument
*
* @return The control operation status.
* @retval MSG_OK in case of success.
* @retval MSG_TIMEOUT in case of operation timeout.
* @retval MSG_RESET in case of operation reset.
*
* @notapi
*/
msg_t sio_lld_control(SIODriver *siop, unsigned int operation, void *arg) {
__syscall4rr(201, SB_VUART_CTL, siop->nvuart, operation, arg);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
return (size_t)r1;
}
/**
* @brief Serves an VUART interrupt.
*
* @param[in] siop pointer to the @p SIODriver object
*
* @notapi
*/
void sio_lld_serve_interrupt(SIODriver *siop) {
sioevents_t events;
#if SIO_USE_SYNCHRONIZATION == TRUE
__syscall2rr(201, SB_VUART_GEVT, siop->nvuart);
osalDbgAssert((msg_t)r0 == HAL_RET_SUCCESS, "unexpected failure");
/* Processing events, if any.*/
events = (sioevents_t)r1;
if (events != (sioevents_t)0) {
/* The callback is finally invoked.*/
__sio_callback(siop);
}
#else
/* Simply invokes the callback.*/
__sio_callback(siop);
#endif
}
#endif /* HAL_USE_SIO == TRUE */
/** @} */
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