diff options
Diffstat (limited to 'os/hal/platforms/AT91SAM7/serial_lld.c')
| -rw-r--r-- | os/hal/platforms/AT91SAM7/serial_lld.c | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/os/hal/platforms/AT91SAM7/serial_lld.c b/os/hal/platforms/AT91SAM7/serial_lld.c deleted file mode 100644 index 91a0558c0..000000000 --- a/os/hal/platforms/AT91SAM7/serial_lld.c +++ /dev/null @@ -1,298 +0,0 @@ -/*
- 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 AT91SAM7/serial_lld.c
- * @brief AT91SAM7 low level serial driver code
- * @addtogroup AT91SAM7_SERIAL
- * @{
- */
-
-#include <ch.h>
-#include <serial.h>
-
-#include "at91lib/aic.h"
-#include "at91sam7.h"
-
-#if SAM7_PLATFORM == SAM7S256
-
-#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
-
-#elif SAM7_PLATFORM == SAM7X256
-
-#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
-
-#else
-#error "serial lines not defined for this SAM7 version"
-#endif
-
-#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
-
-/** @brief Driver default configuration.*/
-static const SerialDriverConfig default_config = {
- 38400,
- AT91C_US_USMODE_NORMAL | AT91C_US_CLKS_CLOCK |
- AT91C_US_CHRL_8_BITS | AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT
-};
-
-/*===========================================================================*/
-/* Low Level Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief USART initialization.
- * @param[in] u pointer to an USART I/O block
- * @param[in] config the architecture-dependent serial driver configuration
- */
-static void usart_init(AT91PS_USART u, const SerialDriverConfig *config) {
-
- /* 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->mr & AT91C_US_OVER)
- u->US_BRGR = MCK / (config->speed * 8);
- else
- u->US_BRGR = MCK / (config->speed * 16);
- u->US_MR = config->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(AT91_REG csr, SerialDriver *sdp) {
- sdflags_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();
- sdAddFlagsI(sdp, sts);
- chSysUnlockFromIsr();
-}
-
-#if defined(__GNU__)
-__attribute__((noinline))
-#endif
-/**
- * @brief Common IRQ handler.
- * @param[in] u pointer to an USART I/O block
- * @param[in] com communication channel associated to the USART
- */
-static void serve_interrupt(AT91PS_USART u, SerialDriver *sdp) {
-
- if (u->US_CSR & AT91C_US_RXRDY) {
- chSysLockFromIsr();
- sdIncomingDataI(sdp, u->US_RHR);
- chSysUnlockFromIsr();
- }
- if (u->US_CSR & AT91C_US_TXRDY) {
- chSysLockFromIsr();
- msg_t b = sdRequestDataI(sdp);
- chSysUnlockFromIsr();
- if (b < Q_OK)
- u->US_IDR = AT91C_US_TXRDY;
- else
- u->US_THR = b;
- }
- if (u->US_CSR & (AT91C_US_OVRE | AT91C_US_FRAME | AT91C_US_PARE | AT91C_US_RXBRK)) {
- set_error(u->US_CSR, sdp);
- u->US_CR = AT91C_US_RSTSTA;
- }
- AT91C_BASE_AIC->AIC_EOICR = 0;
-}
-
-#if USE_SAM7_USART0 || defined(__DOXYGEN__)
-static void notify1(void) {
-
- AT91C_BASE_US0->US_IER = AT91C_US_TXRDY;
-}
-#endif
-
-#if USE_SAM7_USART1 || defined(__DOXYGEN__)
-static void notify2(void) {
-
- AT91C_BASE_US1->US_IER = AT91C_US_TXRDY;
-}
-#endif
-
-/*===========================================================================*/
-/* Low Level Driver interrupt handlers. */
-/*===========================================================================*/
-
-#if USE_SAM7_USART0 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(USART0IrqHandler) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(AT91C_BASE_US0, &SD1);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-#if USE_SAM7_USART1 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(USART1IrqHandler) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(AT91C_BASE_US1, &SD2);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-/*===========================================================================*/
-/* Low Level Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * Low level serial driver initialization. - */
-void sd_lld_init(void) {
-
-#if USE_SAM7_USART0
- sdObjectInit(&SD1, NULL, notify1);
- 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);
- 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
-}
-
-/**
- * @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.
- */
-void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config) {
-
- if (config == NULL)
- config = &default_config;
-
-#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);
- /* USART initialization.*/
- usart_init(AT91C_BASE_US0, config);
- /* Enables associated interrupt vector.*/
- AIC_EnableIT(AT91C_ID_US0);
- return;
- }
-#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);
- /* USART initialization.*/
- usart_init(AT91C_BASE_US1, config);
- /* Enables associated interrupt vector.*/
- AIC_EnableIT(AT91C_ID_US1);
- return;
- }
-#endif
-}
-
-/**
- * @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
- */
-void sd_lld_stop(SerialDriver *sdp) {
-
-#if USE_SAM7_USART0
- if (&SD1 == sdp) {
- usart_deinit(AT91C_BASE_US0);
- AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US0);
- AIC_DisableIT(AT91C_ID_US0);
- return;
- }
-#endif
-#if USE_SAM7_USART1
- if (&SD2 == sdp) {
- usart_deinit(AT91C_BASE_US1);
- AT91C_BASE_PMC->PMC_PCDR = (1 << AT91C_ID_US1);
- AIC_DisableIT(AT91C_ID_US1);
- return;
- }
-#endif
-}
-
-/** @} */
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