mirror of https://github.com/rusefi/ChibiOS.git
424 lines
12 KiB
C
424 lines
12 KiB
C
/*
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* Licensed under ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file SPC5xx/LINFlex_v1/serial_lld.c
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* @brief SPC5xx low level serial driver code.
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*
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* @addtogroup SERIAL
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_SERIAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief LIINFlex-0 serial driver identifier.
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*/
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#if SPC5_SERIAL_USE_LINFLEX0 || defined(__DOXYGEN__)
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SerialDriver SD1;
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#endif
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/**
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* @brief LIINFlex-1 serial driver identifier.
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*/
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#if SPC5_SERIAL_USE_LINFLEX1 || defined(__DOXYGEN__)
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SerialDriver SD2;
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#endif
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/**
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* @brief LIINFlex-2 serial driver identifier.
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*/
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#if SPC5_SERIAL_USE_LINFLEX2 || defined(__DOXYGEN__)
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SerialDriver SD3;
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#endif
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/**
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* @brief LIINFlex-3 serial driver identifier.
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*/
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#if SPC5_SERIAL_USE_LINFLEX3 || defined(__DOXYGEN__)
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SerialDriver SD4;
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#endif
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/**
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* @brief Driver default configuration.
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*/
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static const SerialConfig default_config = {
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SERIAL_DEFAULT_BITRATE,
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SD_MODE_8BITS_PARITY_NONE
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};
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief LINFlex initialization.
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* @details This function must be invoked with interrupts disabled.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] config the architecture-dependent serial driver configuration
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*/
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static void spc5_linflex_init(SerialDriver *sdp, const SerialConfig *config) {
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uint32_t div;
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volatile struct LINFLEX_tag *linflexp = sdp->linflexp;
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/* Enters the configuration mode.*/
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linflexp->LINCR1.R = 1; /* INIT bit. */
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/* Configures the LINFlex in UART mode with all the required
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parameters.*/
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linflexp->UARTCR.R = SPC5_UARTCR_UART; /* UART mode FIRST. */
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linflexp->UARTCR.R = SPC5_UARTCR_UART | SPC5_UARTCR_RXEN | config->mode;
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div = SPC5_LINFLEX0_CLK / config->speed;
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linflexp->LINFBRR.R = (uint16_t)(div & 15); /* Fractional divider. */
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linflexp->LINIBRR.R = (uint16_t)(div >> 4); /* Integer divider. */
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linflexp->UARTSR.R = 0xFFFF; /* Clearing UARTSR register.*/
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linflexp->LINIER.R = SPC5_LINIER_DTIE | SPC5_LINIER_DRIE |
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SPC5_LINIER_BOIE | SPC5_LINIER_FEIE |
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SPC5_LINIER_SZIE; /* Interrupts enabled. */
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/* Leaves the configuration mode.*/
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linflexp->LINCR1.R = 0;
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}
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/**
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* @brief LINFlex de-initialization.
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* @details This function must be invoked with interrupts disabled.
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*
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* @param[in] linflexp pointer to a LINFlex I/O block
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*/
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static void spc5_linflex_deinit(volatile struct LINFLEX_tag *linflexp) {
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/* Enters the configuration mode.*/
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linflexp->LINCR1.R = 1; /* INIT bit. */
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/* Resets the LINFlex registers.*/
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linflexp->LINFBRR.R = 0; /* Fractional divider. */
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linflexp->LINIBRR.R = 0; /* Integer divider. */
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linflexp->UARTSR.R = 0xFFFF; /* Clearing UARTSR register.*/
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linflexp->UARTCR.R = SPC5_UARTCR_UART;
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linflexp->LINIER.R = 0; /* Interrupts disabled. */
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/* Leaves the configuration mode.*/
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linflexp->LINCR1.R = 0;
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}
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/**
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* @brief Common RXI IRQ handler.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*/
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static void spc5xx_serve_rxi_interrupt(SerialDriver *sdp) {
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flagsmask_t sts = 0;
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uint16_t sr = sdp->linflexp->UARTSR.R;
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sdp->linflexp->UARTSR.R = SPC5_UARTSR_NF | SPC5_UARTSR_DRF |
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SPC5_UARTSR_PE0;
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if (sr & SPC5_UARTSR_NF)
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sts |= SD_NOISE_ERROR;
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if (sr & SPC5_UARTSR_PE0)
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sts |= SD_PARITY_ERROR;
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if (sts) {
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chSysLockFromIsr();
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chnAddFlagsI(sdp, sts);
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chSysUnlockFromIsr();
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}
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if (sr & SPC5_UARTSR_DRF) {
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sdIncomingDataI(sdp, sdp->linflexp->BDRM.B.DATA4);
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sdp->linflexp->UARTSR.R = SPC5_UARTSR_RMB;
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}
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}
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/**
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* @brief Common TXI IRQ handler.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*/
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static void spc5xx_serve_txi_interrupt(SerialDriver *sdp) {
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msg_t b;
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sdp->linflexp->UARTSR.R = SPC5_UARTSR_DTF;
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b = chOQGetI(&sdp->oqueue);
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if (b < Q_OK) {
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chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
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sdp->linflexp->UARTCR.B.TXEN = 0;
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}
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else
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sdp->linflexp->BDRL.B.DATA0 = b;
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}
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/**
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* @brief Common ERR IRQ handler.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*/
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static void spc5xx_serve_err_interrupt(SerialDriver *sdp) {
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flagsmask_t sts = 0;
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uint16_t sr = sdp->linflexp->UARTSR.R;
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sdp->linflexp->UARTSR.R = SPC5_UARTSR_BOF | SPC5_UARTSR_FEF |
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SPC5_UARTSR_SZF;
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if (sr & SPC5_UARTSR_BOF)
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sts |= SD_OVERRUN_ERROR;
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if (sr & SPC5_UARTSR_FEF)
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sts |= SD_FRAMING_ERROR;
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if (sr & SPC5_UARTSR_SZF)
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sts |= SD_BREAK_DETECTED;
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chSysLockFromIsr();
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chnAddFlagsI(sdp, sts);
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chSysUnlockFromIsr();
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}
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#if SPC5_SERIAL_USE_LINFLEX0 || defined(__DOXYGEN__)
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static void notify1(GenericQueue *qp) {
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(void)qp;
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if (!SD1.linflexp->UARTCR.B.TXEN) {
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msg_t b = sdRequestDataI(&SD1);
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if (b != Q_EMPTY) {
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SD1.linflexp->UARTCR.B.TXEN = 1;
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SD1.linflexp->BDRL.B.DATA0 = b;
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}
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}
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}
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#endif
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#if SPC5_SERIAL_USE_LINFLEX1 || defined(__DOXYGEN__)
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static void notify2(GenericQueue *qp) {
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(void)qp;
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if (!SD2.linflexp->UARTCR.B.TXEN) {
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msg_t b = sdRequestDataI(&SD2);
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if (b != Q_EMPTY) {
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SD2.linflexp->UARTCR.B.TXEN = 1;
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SD2.linflexp->BDRL.B.DATA0 = b;
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}
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}
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}
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#endif
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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#if SPC5_SERIAL_USE_LINFLEX0 || defined(__DOXYGEN__)
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#if !defined(SPC5_LINFLEX0_RXI_HANDLER)
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#error "SPC5_LINFLEX0_RXI_HANDLER not defined"
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#endif
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/**
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* @brief LINFlex-0 RXI interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(SPC5_LINFLEX0_RXI_HANDLER) {
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CH_IRQ_PROLOGUE();
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spc5xx_serve_rxi_interrupt(&SD1);
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CH_IRQ_EPILOGUE();
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}
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#if !defined(SPC5_LINFLEX0_TXI_HANDLER)
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#error "SPC5_LINFLEX0_TXI_HANDLER not defined"
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#endif
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/**
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* @brief LINFlex-0 TXI interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(SPC5_LINFLEX0_TXI_HANDLER) {
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CH_IRQ_PROLOGUE();
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spc5xx_serve_txi_interrupt(&SD1);
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CH_IRQ_EPILOGUE();
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}
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#if !defined(SPC5_LINFLEX0_ERR_HANDLER)
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#error "SPC5_LINFLEX0_ERR_HANDLER not defined"
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#endif
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/**
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* @brief LINFlex-0 ERR interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(SPC5_LINFLEX0_ERR_HANDLER) {
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CH_IRQ_PROLOGUE();
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spc5xx_serve_err_interrupt(&SD1);
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CH_IRQ_EPILOGUE();
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}
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#endif
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#if SPC5_SERIAL_USE_LINFLEX1 || defined(__DOXYGEN__)
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#if !defined(SPC5_LINFLEX1_RXI_HANDLER)
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#error "SPC5_LINFLEX1_RXI_HANDLER not defined"
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#endif
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/**
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* @brief LINFlex-1 RXI interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(SPC5_LINFLEX1_RXI_HANDLER) {
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CH_IRQ_PROLOGUE();
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spc5xx_serve_rxi_interrupt(&SD2);
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CH_IRQ_EPILOGUE();
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}
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#if !defined(SPC5_LINFLEX1_TXI_HANDLER)
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#error "SPC5_LINFLEX1_TXI_HANDLER not defined"
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#endif
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/**
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* @brief LINFlex-1 TXI interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(SPC5_LINFLEX1_TXI_HANDLER) {
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CH_IRQ_PROLOGUE();
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spc5xx_serve_txi_interrupt(&SD2);
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CH_IRQ_EPILOGUE();
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}
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#if !defined(SPC5_LINFLEX1_ERR_HANDLER)
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#error "SPC5_LINFLEX1_ERR_HANDLER not defined"
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#endif
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/**
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* @brief LINFlex-1 ERR interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(SPC5_LINFLEX1_ERR_HANDLER) {
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CH_IRQ_PROLOGUE();
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spc5xx_serve_err_interrupt(&SD2);
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CH_IRQ_EPILOGUE();
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}
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#endif
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level serial driver initialization.
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*
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* @notapi
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*/
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void sd_lld_init(void) {
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#if SPC5_SERIAL_USE_LINFLEX0
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sdObjectInit(&SD1, NULL, notify1);
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SD1.linflexp = &LINFLEX_0;
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INTC.PSR[SPC5_LINFLEX0_RXI_NUMBER].R = SPC5_SERIAL_LINFLEX0_PRIORITY;
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INTC.PSR[SPC5_LINFLEX0_TXI_NUMBER].R = SPC5_SERIAL_LINFLEX0_PRIORITY;
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INTC.PSR[SPC5_LINFLEX0_ERR_NUMBER].R = SPC5_SERIAL_LINFLEX0_PRIORITY;
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#endif
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#if SPC5_SERIAL_USE_LINFLEX1
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sdObjectInit(&SD2, NULL, notify2);
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SD2.linflexp = &LINFLEX_1;
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INTC.PSR[SPC5_LINFLEX1_RXI_NUMBER].R = SPC5_SERIAL_LINFLEX1_PRIORITY;
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INTC.PSR[SPC5_LINFLEX1_TXI_NUMBER].R = SPC5_SERIAL_LINFLEX1_PRIORITY;
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INTC.PSR[SPC5_LINFLEX1_ERR_NUMBER].R = SPC5_SERIAL_LINFLEX1_PRIORITY;
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#endif
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}
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/**
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* @brief Low level serial driver configuration and (re)start.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] config the architecture-dependent serial driver configuration.
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* If this parameter is set to @p NULL then a default
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* configuration is used.
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*
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* @notapi
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*/
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void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
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if (config == NULL)
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config = &default_config;
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if (sdp->state == SD_STOP) {
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#if SPC5_SERIAL_USE_LINFLEX0
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if (&SD1 == sdp) {
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halSPCSetPeripheralClockMode(SPC5_LINFLEX0_PCTL,
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SPC5_SERIAL_LINFLEX0_START_PCTL);
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}
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#endif
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#if SPC5_SERIAL_USE_LINFLEX1
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if (&SD2 == sdp) {
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halSPCSetPeripheralClockMode(SPC5_LINFLEX1_PCTL,
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SPC5_SERIAL_LINFLEX1_START_PCTL);
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}
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#endif
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}
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spc5_linflex_init(sdp, config);
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}
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/**
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* @brief Low level serial driver stop.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*
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* @notapi
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*/
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void sd_lld_stop(SerialDriver *sdp) {
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if (sdp->state == SD_READY) {
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spc5_linflex_deinit(sdp->linflexp);
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#if SPC5_SERIAL_USE_LINFLEX0
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if (&SD1 == sdp) {
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halSPCSetPeripheralClockMode(SPC5_LINFLEX0_PCTL,
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SPC5_SERIAL_LINFLEX0_STOP_PCTL);
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return;
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}
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#endif
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#if SPC5_SERIAL_USE_LINFLEX1
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if (&SD2 == sdp) {
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halSPCSetPeripheralClockMode(SPC5_LINFLEX1_PCTL,
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SPC5_SERIAL_LINFLEX1_STOP_PCTL);
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return;
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}
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#endif
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}
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}
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#endif /* HAL_USE_SERIAL */
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/** @} */
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