diff options
Diffstat (limited to 'os/hal/platforms/SPC563/serial_lld.c')
| -rw-r--r-- | os/hal/platforms/SPC563/serial_lld.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/os/hal/platforms/SPC563/serial_lld.c b/os/hal/platforms/SPC563/serial_lld.c new file mode 100644 index 000000000..0ad4bf312 --- /dev/null +++ b/os/hal/platforms/SPC563/serial_lld.c @@ -0,0 +1,291 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file SPC563/serial_lld.c
+ * @brief SPC563 low level serial driver code.
+ *
+ * @addtogroup SPC563_SERIAL
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if CH_HAL_USE_SERIAL || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief eSCI-A serial driver identifier.
+ */
+#if USE_SPC563_ESCIA || defined(__DOXYGEN__)
+SerialDriver SD1;
+#endif
+
+/**
+ * @brief eSCI-B serial driver identifier.
+ */
+#if USE_SPC563_ESCIB || defined(__DOXYGEN__)
+SerialDriver SD2;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/**
+ * @brief Driver default configuration.
+ */
+static const SerialConfig default_config = {
+ SERIAL_DEFAULT_BITRATE,
+ SC_MODE_NORMAL | SC_MODE_PARITY_NONE
+};
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief eSCI initialization.
+ * @details This function must be invoked with interrupts disabled.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ */
+static void esci_init(SerialDriver *sdp) {
+ volatile struct ESCI_tag *escip = sdp->escip;
+ uint8_t mode = sdp->config->sc_mode;
+
+ escip->CR2.R = 0; /* MDIS off. */
+ escip->CR1.R = 0;
+ escip->LCR.R = 0;
+ escip->CR1.B.SBR = SPC563_SYSCLK / (16 * sdp->config->sc_speed);
+ if (mode & SC_MODE_LOOPBACK)
+ escip->CR1.B.LOOPS = 1;
+ switch (mode & SC_MODE_PARITY) {
+ case SC_MODE_PARITY_ODD:
+ escip->CR1.B.PT = 1;
+ case SC_MODE_PARITY_EVEN:
+ escip->CR1.B.PE = 1;
+ escip->CR1.B.M = 1; /* Makes it 8 bits data + 1 bit parity. */
+ default:
+ ;
+ }
+ escip->LPR.R = 0;
+ escip->CR1.R |= 0x0000002C; /* RIE, TE, RE to 1. */
+ escip->CR2.R |= 0x000F; /* ORIE, NFIE, FEIE, PFIE to 1. */
+}
+
+/**
+ * @brief eSCI de-initialization.
+ * @details This function must be invoked with interrupts disabled.
+ *
+ * @param[in] escip pointer to an eSCI I/O block
+ */
+static void esci_deinit(volatile struct ESCI_tag *escip) {
+
+ escip->LPR.R = 0;
+ escip->SR.R = 0xFFFFFFFF;
+ escip->CR1.R = 0;
+ escip->CR2.R = 0x8000; /* MDIS on. */
+}
+
+/**
+ * @brief Error handling routine.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ * @param[in] sr eSCI SR register value
+ */
+static void set_error(SerialDriver *sdp, uint32_t sr) {
+ sdflags_t sts = 0;
+
+ if (sr & 0x08000000)
+ sts |= SD_OVERRUN_ERROR;
+ if (sr & 0x04000000)
+ sts |= SD_NOISE_ERROR;
+ if (sr & 0x02000000)
+ sts |= SD_FRAMING_ERROR;
+ if (sr & 0x01000000)
+ sts |= SD_PARITY_ERROR;
+/* if (sr & 0x00000000)
+ sts |= SD_BREAK_DETECTED;*/
+ chSysLockFromIsr();
+ sdAddFlagsI(sdp, sts);
+ chSysUnlockFromIsr();
+}
+
+/**
+ * @brief Common IRQ handler.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ */
+static void serve_interrupt(SerialDriver *sdp) {
+ volatile struct ESCI_tag *escip = sdp->escip;
+
+ uint32_t sr = escip->SR.R;
+ escip->SR.R = 0x3FFFFFFF; /* Does not clear TDRE | TC.*/
+ if (sr & 0x0F000000) /* OR | NF | FE | PF. */
+ set_error(sdp, sr);
+ if (sr & 0x20000000) { /* RDRF. */
+ chSysLockFromIsr();
+ sdIncomingDataI(sdp, escip->DR.B.D);
+ chSysUnlockFromIsr();
+ }
+ if (escip->CR1.B.TIE && (sr & 0x80000000)) { /* TDRE. */
+ msg_t b;
+ chSysLockFromIsr();
+ b = chOQGetI(&sdp->oqueue);
+ if (b < Q_OK) {
+ chEvtBroadcastI(&sdp->oevent);
+ escip->CR1.B.TIE = 0;
+ }
+ else {
+ ESCI_A.SR.B.TDRE = 1;
+ escip->DR.R = (uint16_t)b;
+ }
+ chSysUnlockFromIsr();
+ }
+}
+
+#if USE_SPC563_ESCIA || defined(__DOXYGEN__)
+static void notify1(void) {
+
+ if (ESCI_A.SR.B.TDRE) {
+ msg_t b = sdRequestDataI(&SD1);
+ if (b != Q_EMPTY) {
+ ESCI_A.SR.B.TDRE = 1;
+ ESCI_A.CR1.B.TIE = 1;
+ ESCI_A.DR.R = (uint16_t)b;
+ }
+ }
+/* if (!ESCI_A.CR1.B.TIE) {
+ msg_t b = sdRequestDataI(&SD1);
+ if (b != Q_EMPTY) {
+ ESCI_A.CR1.B.TIE = 1;
+ ESCI_A.DR.R = (uint16_t)b;
+ }
+ }*/
+}
+#endif
+
+#if USE_SPC563_ESCIB || defined(__DOXYGEN__)
+static void notify2(void) {
+
+ if (ESCI_B.SR.B.TDRE) {
+ msg_t b = sdRequestDataI(&SD2);
+ if (b != Q_EMPTY) {
+ ESCI_B.SR.B.TDRE = 1;
+ ESCI_B.CR1.B.TIE = 1;
+ ESCI_B.DR.R = (uint16_t)b;
+ }
+ }
+/* if (!ESCI_B.CR1.B.TIE) {
+ msg_t b = sdRequestDataI(&SD2);
+ if (b != Q_EMPTY) {
+ ESCI_B.CR1.B.TIE = 1;
+ ESCI_B.DR.R = (uint16_t)b;
+ }
+ }*/
+}
+#endif
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if USE_SPC563_ESCIA || defined(__DOXYGEN__)
+/**
+ * @brief eSCI-A interrupt handler.
+ */
+CH_IRQ_HANDLER(vector146) {
+
+ CH_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD1);
+
+ CH_IRQ_EPILOGUE();
+}
+#endif
+
+#if USE_SPC563_ESCIB || defined(__DOXYGEN__)
+/**
+ * @brief eSCI-B interrupt handler.
+ */
+CH_IRQ_HANDLER(vector149) {
+
+ CH_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD2);
+
+ CH_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level serial driver initialization. + */
+void sd_lld_init(void) {
+
+#if USE_SPC563_ESCIA
+ sdObjectInit(&SD1, NULL, notify1);
+ SD1.escip = &ESCI_A;
+ ESCI_A.CR2.R = 0x8000; /* MDIS ON. */
+ INTC.PSR[146].R = SPC563_ESCIA_PRIORITY;
+#endif
+
+#if USE_SPC563_ESCIB
+ sdObjectInit(&SD2, NULL, notify2);
+ SD2.escip = &ESCI_B;
+ ESCI_B.CR2.R = 0x8000; /* MDIS ON. */
+ INTC.PSR[149].R = SPC563_ESCIB_PRIORITY;
+#endif
+}
+
+/**
+ * @brief Low level serial driver configuration and (re)start.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ */
+void sd_lld_start(SerialDriver *sdp) {
+
+ if (sdp->config == NULL)
+ sdp->config = &default_config;
+ esci_init(sdp);
+}
+
+/**
+ * @brief Low level serial driver stop.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ */
+void sd_lld_stop(SerialDriver *sdp) {
+
+ if (sdp->state == SD_READY)
+ esci_deinit(sdp->escip);
+}
+
+#endif /* CH_HAL_USE_SERIAL */
+
+/** @} */
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