diff options
Diffstat (limited to 'os/hal/platforms/AT91SAM7/serial_lld.c')
| -rw-r--r-- | os/hal/platforms/AT91SAM7/serial_lld.c | 444 |
1 files changed, 0 insertions, 444 deletions
diff --git a/os/hal/platforms/AT91SAM7/serial_lld.c b/os/hal/platforms/AT91SAM7/serial_lld.c deleted file mode 100644 index e586a6342..000000000 --- a/os/hal/platforms/AT91SAM7/serial_lld.c +++ /dev/null @@ -1,444 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2013 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 AT91SAM7/serial_lld.c
- * @brief AT91SAM7 low level serial driver code.
- *
- * @addtogroup SERIAL
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if HAL_USE_SERIAL || defined(__DOXYGEN__)
-
-#if (SAM7_PLATFORM == SAM7S64) || (SAM7_PLATFORM == SAM7S128) || \
- (SAM7_PLATFORM == SAM7S256) || (SAM7_PLATFORM == SAM7S512)
-
-#define SAM7_USART0_RX AT91C_PA5_RXD0
-#define SAM7_USART0_TX AT91C_PA6_TXD0
-#define SAM7_USART1_RX AT91C_PA21_RXD1
-#define SAM7_USART1_TX AT91C_PA22_TXD1
-#define SAM7_DBGU_RX AT91C_PA9_DRXD
-#define SAM7_DBGU_TX AT91C_PA10_DTXD
-
-#elif (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
- (SAM7_PLATFORM == SAM7X512)
-
-#define SAM7_USART0_RX AT91C_PA0_RXD0
-#define SAM7_USART0_TX AT91C_PA1_TXD0
-#define SAM7_USART1_RX AT91C_PA5_RXD1
-#define SAM7_USART1_TX AT91C_PA6_TXD1
-#define SAM7_DBGU_RX AT91C_PA27_DRXD
-#define SAM7_DBGU_TX AT91C_PA28_DTXD
-
-#elif (SAM7_PLATFORM == SAM7A3)
-#define SAM7_USART0_RX AT91C_PA2_RXD0
-#define SAM7_USART0_TX AT91C_PA3_TXD0
-#define SAM7_USART1_RX AT91C_PA7_RXD1
-#define SAM7_USART1_TX AT91C_PA8_TXD1
-#define SAM7_USART2_RX AT91C_PA9_RXD2
-#define SAM7_USART2_TX AT91C_PA10_TXD2
-#define SAM7_DBGU_RX AT91C_PA30_DRXD
-#define SAM7_DBGU_TX AT91C_PA31_DTXD
-
-#else
-#error "serial lines not defined for this SAM7 version"
-#endif /* HAL_USE_SERIAL */
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-#if USE_SAM7_USART0 || defined(__DOXYGEN__)
-/** @brief USART0 serial driver identifier.*/
-SerialDriver SD1;
-#endif
-
-#if USE_SAM7_USART1 || defined(__DOXYGEN__)
-/** @brief USART1 serial driver identifier.*/
-SerialDriver SD2;
-#endif
-
-#if (SAM7_PLATFORM == SAM7A3)
-#if USE_SAM7_USART2 || defined(__DOXYGEN__)
-/** @brief USART2 serial driver identifier.*/
-SerialDriver SD3;
-#endif
-#endif
-
-#if USE_SAM7_DBGU_UART || defined(__DOXYGEN__)
-/** @brief DBGU_UART serial driver identifier.*/
-SerialDriver SDDBG;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/** @brief Driver default configuration.*/
-static const SerialConfig default_config = {
- SERIAL_DEFAULT_BITRATE,
- AT91C_US_USMODE_NORMAL | AT91C_US_CLKS_CLOCK |
- AT91C_US_CHRL_8_BITS | AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT
-};
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief USART initialization.
- *
- * @param[in] sdp communication channel associated to the USART
- * @param[in] config the architecture-dependent serial driver configuration
- */
-static void usart_init(SerialDriver *sdp, const SerialConfig *config) {
- AT91PS_USART u = sdp->usart;
-
- /* Disables IRQ sources and stop operations.*/
- u->US_IDR = 0xFFFFFFFF;
- u->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX | AT91C_US_RSTSTA;
-
- /* New parameters setup.*/
- if (config->sc_mr & AT91C_US_OVER)
- u->US_BRGR = MCK / (config->sc_speed * 8);
- else
- u->US_BRGR = MCK / (config->sc_speed * 16);
- u->US_MR = config->sc_mr;
- u->US_RTOR = 0;
- u->US_TTGR = 0;
-
- /* Enables operations and IRQ sources.*/
- u->US_CR = AT91C_US_RXEN | AT91C_US_TXEN | AT91C_US_DTREN | AT91C_US_RTSEN;
- u->US_IER = AT91C_US_RXRDY | AT91C_US_OVRE | AT91C_US_FRAME | AT91C_US_PARE |
- AT91C_US_RXBRK;
-}
-
-/**
- * @brief USART de-initialization.
- *
- * @param[in] u pointer to an USART I/O block
- */
-static void usart_deinit(AT91PS_USART u) {
-
- /* Disables IRQ sources and stop operations.*/
- u->US_IDR = 0xFFFFFFFF;
- u->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX | AT91C_US_RSTSTA;
- u->US_MR = 0;
- u->US_RTOR = 0;
- u->US_TTGR = 0;
-}
-
-/**
- * @brief Error handling routine.
- *
- * @param[in] err USART CSR register value
- * @param[in] sdp communication channel associated to the USART
- */
-static void set_error(SerialDriver *sdp, AT91_REG csr) {
- flagsmask_t sts = 0;
-
- if (csr & AT91C_US_OVRE)
- sts |= SD_OVERRUN_ERROR;
- if (csr & AT91C_US_PARE)
- sts |= SD_PARITY_ERROR;
- if (csr & AT91C_US_FRAME)
- sts |= SD_FRAMING_ERROR;
- if (csr & AT91C_US_RXBRK)
- sts |= SD_BREAK_DETECTED;
- chSysLockFromIsr();
- chnAddFlagsI(sdp, sts);
- chSysUnlockFromIsr();
-}
-
-#if defined(__GNUC__)
-__attribute__((noinline))
-#endif
-#if !USE_SAM7_DBGU_UART
-static
-#endif
-/**
- * @brief Common IRQ handler.
- *
- * @param[in] sdp communication channel associated to the USART
- */
-void sd_lld_serve_interrupt(SerialDriver *sdp) {
- uint32_t csr;
- AT91PS_USART u = sdp->usart;
-
- csr = u->US_CSR;
- if (csr & AT91C_US_RXRDY) {
- chSysLockFromIsr();
- sdIncomingDataI(sdp, u->US_RHR);
- chSysUnlockFromIsr();
- }
- if ((u->US_IMR & AT91C_US_TXRDY) && (csr & AT91C_US_TXRDY)) {
- msg_t b;
-
- chSysLockFromIsr();
- b = chOQGetI(&sdp->oqueue);
- if (b < Q_OK) {
- chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
- u->US_IDR = AT91C_US_TXRDY;
- }
- else
- u->US_THR = b;
- chSysUnlockFromIsr();
- }
- csr &= (AT91C_US_OVRE | AT91C_US_FRAME | AT91C_US_PARE | AT91C_US_RXBRK);
- if (csr != 0) {
- set_error(sdp, csr);
- u->US_CR = AT91C_US_RSTSTA;
- }
- AT91C_BASE_AIC->AIC_EOICR = 0;
-}
-
-#if USE_SAM7_USART0 || defined(__DOXYGEN__)
-static void notify1(GenericQueue *qp) {
-
- (void)qp;
- AT91C_BASE_US0->US_IER = AT91C_US_TXRDY;
-}
-#endif
-
-#if USE_SAM7_USART1 || defined(__DOXYGEN__)
-static void notify2(GenericQueue *qp) {
-
- (void)qp;
- AT91C_BASE_US1->US_IER = AT91C_US_TXRDY;
-}
-#endif
-
-#if (SAM7_PLATFORM == SAM7A3)
-#if USE_SAM7_USART2 || defined(__DOXYGEN__)
-static void notify3(GenericQueue *qp) {
-
- (void)qp;
- AT91C_BASE_US2->US_IER = AT91C_US_TXRDY;
-}
-#endif
-#endif /* (SAM7_PLATFORM == SAM7A3) */
-
-#if USE_SAM7_DBGU_UART || defined(__DOXYGEN__)
-static void notify_dbg(GenericQueue *qp) {
-
- (void)qp;
- AT91C_BASE_DBGU->DBGU_IER = AT91C_US_TXRDY;
-}
-#endif
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-#if USE_SAM7_USART0 || defined(__DOXYGEN__)
-/**
- * @brief USART0 interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(USART0IrqHandler) {
-
- CH_IRQ_PROLOGUE();
- sd_lld_serve_interrupt(&SD1);
- AT91C_BASE_AIC->AIC_EOICR = 0;
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-#if USE_SAM7_USART1 || defined(__DOXYGEN__)
-/**
- * @brief USART1 interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(USART1IrqHandler) {
-
- CH_IRQ_PROLOGUE();
- sd_lld_serve_interrupt(&SD2);
- AT91C_BASE_AIC->AIC_EOICR = 0;
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-#if (SAM7_PLATFORM == SAM7A3)
-#if USE_SAM7_USART2 || defined(__DOXYGEN__)
-/**
- * @brief USART2 interrupt handler.
- *
- * @isr
- */
-CH_IRQ_HANDLER(USART2IrqHandler) {
-
- CH_IRQ_PROLOGUE();
- sd_lld_serve_interrupt(&SD3);
- AT91C_BASE_AIC->AIC_EOICR = 0;
- CH_IRQ_EPILOGUE();
-}
-#endif
-#endif /* (SAM7_PLATFORM == SAM7A3) */
-
-/* note - DBGU_UART IRQ is the SysIrq in board.c
- since it's not vectored separately by the AIC.*/
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level serial driver initialization.
- *
- * @notapi
- */
-void sd_lld_init(void) {
-
-#if USE_SAM7_USART0
- sdObjectInit(&SD1, NULL, notify1);
- SD1.usart = AT91C_BASE_US0;
- AT91C_BASE_PIOA->PIO_PDR = SAM7_USART0_RX | SAM7_USART0_TX;
- AT91C_BASE_PIOA->PIO_ASR = SAM7_USART0_RX | SAM7_USART0_TX;
- AT91C_BASE_PIOA->PIO_PPUDR = SAM7_USART0_RX | SAM7_USART0_TX;
- AIC_ConfigureIT(AT91C_ID_US0,
- AT91C_AIC_SRCTYPE_HIGH_LEVEL | SAM7_USART0_PRIORITY,
- USART0IrqHandler);
-#endif
-
-#if USE_SAM7_USART1
- sdObjectInit(&SD2, NULL, notify2);
- SD2.usart = AT91C_BASE_US1;
- AT91C_BASE_PIOA->PIO_PDR = SAM7_USART1_RX | SAM7_USART1_TX;
- AT91C_BASE_PIOA->PIO_ASR = SAM7_USART1_RX | SAM7_USART1_TX;
- AT91C_BASE_PIOA->PIO_PPUDR = SAM7_USART1_RX | SAM7_USART1_TX;
- AIC_ConfigureIT(AT91C_ID_US1,
- AT91C_AIC_SRCTYPE_HIGH_LEVEL | SAM7_USART1_PRIORITY,
- USART1IrqHandler);
-#endif
-
-#if (SAM7_PLATFORM == SAM7A3)
-#if USE_SAM7_USART2
- sdObjectInit(&SD3, NULL, notify3);
- SD3.usart = AT91C_BASE_US2;
- AT91C_BASE_PIOA->PIO_PDR = SAM7_USART2_RX | SAM7_USART2_TX;
- AT91C_BASE_PIOA->PIO_ASR = SAM7_USART2_RX | SAM7_USART2_TX;
- AT91C_BASE_PIOA->PIO_PPUDR = SAM7_USART2_RX | SAM7_USART2_TX;
- AIC_ConfigureIT(AT91C_ID_US2,
- AT91C_AIC_SRCTYPE_HIGH_LEVEL | SAM7_USART2_PRIORITY,
- USART2IrqHandler);
-#endif
-#endif /* (SAM7_PLATFORM == SAM7A3) */
-
-#if USE_SAM7_DBGU_UART
- sdObjectInit(&SDDBG, NULL, notify_dbg);
- /* this is a little cheap, but OK for now since there's enough overlap
- between dbgu and usart register maps. it means we can reuse all the
- same usart interrupt handling and config that already exists.*/
- SDDBG.usart = (AT91PS_USART)AT91C_BASE_DBGU;
- AT91C_BASE_PIOA->PIO_PDR = SAM7_DBGU_RX | SAM7_DBGU_TX;
- AT91C_BASE_PIOA->PIO_ASR = SAM7_DBGU_RX | SAM7_DBGU_TX;
- AT91C_BASE_PIOA->PIO_PPUDR = SAM7_DBGU_RX | SAM7_DBGU_TX;
-#endif
-}
-
-/**
- * @brief Low level serial driver configuration and (re)start.
- *
- * @param[in] sdp pointer to a @p SerialDriver object
- * @param[in] config the architecture-dependent serial driver configuration.
- * If this parameter is set to @p NULL then a default
- * configuration is used.
- *
- * @notapi
- */
-void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
-
- if (config == NULL)
- config = &default_config;
-
- if (sdp->state == SD_STOP) {
-#if USE_SAM7_USART0
- if (&SD1 == sdp) {
- /* Starts the clock and clears possible sources of immediate interrupts.*/
- AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_US0);
- /* Enables associated interrupt vector.*/
- AIC_EnableIT(AT91C_ID_US0);
- }
-#endif
-#if USE_SAM7_USART1
- if (&SD2 == sdp) {
- /* Starts the clock and clears possible sources of immediate interrupts.*/
- AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_US1);
- /* Enables associated interrupt vector.*/
- AIC_EnableIT(AT91C_ID_US1);
- }
-#endif
-#if (SAM7_PLATFORM == SAM7A3)
-#if USE_SAM7_USART2
- if (&SD3 == sdp) {
- /* Starts the clock and clears possible sources of immediate interrupts.*/
- AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_US2);
- /* Enables associated interrupt vector.*/
- AIC_EnableIT(AT91C_ID_US2);
- }
-#endif
-#endif /* (SAM7_PLATFORM == SAM7A3) */
- /* Note - no explicit start for SD3 (DBGU_UART) since it's not included
- in the AIC or PMC.*/
- }
- usart_init(sdp, config);
-}
-
-/**
- * @brief Low level serial driver stop.
- * @details De-initializes the USART, stops the associated clock, resets the
- * interrupt vector.
- *
- * @param[in] sdp pointer to a @p SerialDriver object
- *
- * @notapi
- */
-void sd_lld_stop(SerialDriver *sdp) {
-
- if (sdp->state == SD_READY) {
- usart_deinit(sdp->usart);
-#if USE_SAM7_USART0
- if (&SD1 == sdp) {
- AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US0);
- AIC_DisableIT(AT91C_ID_US0);
- return;
- }
-#endif
-#if USE_SAM7_USART1
- if (&SD2 == sdp) {
- AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US1);
- AIC_DisableIT(AT91C_ID_US1);
- return;
- }
-#endif
-#if USE_SAM7_DBGU_UART
- if (&SDDBG == sdp) {
- AT91C_BASE_DBGU->DBGU_IDR = 0xFFFFFFFF;
- return;
- }
-#endif
- }
-}
-
-#endif /* HAL_USE_SERIAL */
-
-/** @} */
|