diff options
Diffstat (limited to 'bsps/arm/shared/serial/zynq-uart.c')
| -rw-r--r-- | bsps/arm/shared/serial/zynq-uart.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/bsps/arm/shared/serial/zynq-uart.c b/bsps/arm/shared/serial/zynq-uart.c deleted file mode 100644 index fc670441b8..0000000000 --- a/bsps/arm/shared/serial/zynq-uart.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * SPDX-License-Identifier: BSD-2-Clause - * - * Copyright (C) 2013, 2017 embedded brains GmbH - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <bsp/zynq-uart.h> -#include <bsp/zynq-uart-regs.h> -#include <bsp/irq.h> - -#include <bspopts.h> - -#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS -static void zynq_uart_interrupt(void *arg) -{ - rtems_termios_tty *tty = arg; - zynq_uart_context *ctx = rtems_termios_get_device_context(tty); - volatile zynq_uart *regs = ctx->regs; - uint32_t channel_sts; - - if ((regs->irq_sts & (ZYNQ_UART_TIMEOUT | ZYNQ_UART_RTRIG)) != 0) { - regs->irq_sts = ZYNQ_UART_TIMEOUT | ZYNQ_UART_RTRIG; - - do { - char c = (char) ZYNQ_UART_TX_RX_FIFO_FIFO_GET(regs->tx_rx_fifo); - - rtems_termios_enqueue_raw_characters(tty, &c, 1); - - channel_sts = regs->channel_sts; - } while ((channel_sts & ZYNQ_UART_CHANNEL_STS_REMPTY) == 0); - } else { - channel_sts = regs->channel_sts; - } - - if (ctx->transmitting && (channel_sts & ZYNQ_UART_CHANNEL_STS_TEMPTY) != 0) { - rtems_termios_dequeue_characters(tty, 1); - } -} -#endif - -static bool zynq_uart_first_open( - rtems_termios_tty *tty, - rtems_termios_device_context *base, - struct termios *term, - rtems_libio_open_close_args_t *args -) -{ -#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS - zynq_uart_context *ctx = (zynq_uart_context *) base; - volatile zynq_uart *regs = ctx->regs; - rtems_status_code sc; -#endif - - rtems_termios_set_initial_baud(tty, ZYNQ_UART_DEFAULT_BAUD); - zynq_uart_initialize(base); - -#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS - regs->rx_timeout = 32; - regs->rx_fifo_trg_lvl = ZYNQ_UART_FIFO_DEPTH / 2; - regs->irq_dis = 0xffffffff; - regs->irq_sts = 0xffffffff; - regs->irq_en = ZYNQ_UART_RTRIG | ZYNQ_UART_TIMEOUT; - sc = rtems_interrupt_handler_install( - ctx->irq, - "UART", - RTEMS_INTERRUPT_SHARED, - zynq_uart_interrupt, - tty - ); - if (sc != RTEMS_SUCCESSFUL) { - return false; - } -#endif - - return true; -} - -#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS -static void zynq_uart_last_close( - rtems_termios_tty *tty, - rtems_termios_device_context *base, - rtems_libio_open_close_args_t *args -) -{ - zynq_uart_context *ctx = (zynq_uart_context *) base; - - rtems_interrupt_handler_remove(ctx->irq, zynq_uart_interrupt, tty); -} -#endif - -static void zynq_uart_write_support( - rtems_termios_device_context *base, - const char *buf, - size_t len -) -{ -#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS - zynq_uart_context *ctx = (zynq_uart_context *) base; - volatile zynq_uart *regs = ctx->regs; - - if (len > 0) { - ctx->transmitting = true; - regs->irq_sts = ZYNQ_UART_TEMPTY; - regs->irq_en = ZYNQ_UART_TEMPTY; - regs->tx_rx_fifo = ZYNQ_UART_TX_RX_FIFO_FIFO(buf[0]); - } else { - ctx->transmitting = false; - regs->irq_dis = ZYNQ_UART_TEMPTY; - } -#else - ssize_t i; - - for (i = 0; i < len; ++i) { - zynq_uart_write_polled(base, buf[i]); - } -#endif -} - -static bool zynq_uart_set_attributes( - rtems_termios_device_context *context, - const struct termios *term -) -{ -#if 0 - volatile zynq_uart *regs = zynq_uart_get_regs(minor); - uint32_t brgr = 0; - uint32_t bauddiv = 0; - int rc; - - rc = zynq_cal_baud_rate(115200, &brgr, &bauddiv, regs->mode); - if (rc != 0) - return rc; - - regs->control &= ~(ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN); - regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(brgr); - regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(bauddiv); - regs->control |= ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN; - - return true; -#else - return false; -#endif -} - -const rtems_termios_device_handler zynq_uart_handler = { - .first_open = zynq_uart_first_open, - .set_attributes = zynq_uart_set_attributes, - .write = zynq_uart_write_support, -#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS - .last_close = zynq_uart_last_close, - .mode = TERMIOS_IRQ_DRIVEN -#else - .poll_read = zynq_uart_read_polled, - .mode = TERMIOS_POLLED -#endif -}; |