diff options
Diffstat (limited to 'bsps/shared/dev/serial/zynq-uart-polled.c')
-rw-r--r-- | bsps/shared/dev/serial/zynq-uart-polled.c | 43 |
1 files changed, 20 insertions, 23 deletions
diff --git a/bsps/shared/dev/serial/zynq-uart-polled.c b/bsps/shared/dev/serial/zynq-uart-polled.c index 6865fa8d6f..dbf75539f6 100644 --- a/bsps/shared/dev/serial/zynq-uart-polled.c +++ b/bsps/shared/dev/serial/zynq-uart-polled.c @@ -1,7 +1,16 @@ -/* - * SPDX-License-Identifier: BSD-2-Clause +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file * - * Copyright (C) 2013, 2017 embedded brains GmbH + * @ingroup RTEMSBSPsARMZynq + * + * @brief This source file contains the implementation of the polled Zynq UART + * support. + */ + +/* + * Copyright (C) 2013, 2017 embedded brains GmbH & Co. KG * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -115,10 +124,8 @@ int zynq_cal_baud_rate(uint32_t baudrate, return 0; } -void zynq_uart_initialize(rtems_termios_device_context *base) +void zynq_uart_initialize(volatile zynq_uart *regs) { - zynq_uart_context *ctx = (zynq_uart_context *) base; - volatile zynq_uart *regs = ctx->regs; uint32_t brgr = 0x3e; uint32_t bauddiv = 0x6; uint32_t mode_clks = regs->mode & ZYNQ_UART_MODE_CLKS; @@ -145,18 +152,15 @@ void zynq_uart_initialize(rtems_termios_device_context *base) | ZYNQ_UART_MODE_CHRL(ZYNQ_UART_MODE_CHRL_8) | mode_clks; - while (zynq_uart_read_polled(base) >= 0) { + while (zynq_uart_read_char_polled(regs) >= 0) { /* Drop */ } - zynq_uart_reset_tx_flush(ctx); + zynq_uart_reset_tx_flush(regs); } -int zynq_uart_read_polled(rtems_termios_device_context *base) +int zynq_uart_read_char_polled(volatile zynq_uart *regs) { - zynq_uart_context *ctx = (zynq_uart_context *) base; - volatile zynq_uart *regs = ctx->regs; - if ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_REMPTY) != 0) { return -1; } else { @@ -164,14 +168,8 @@ int zynq_uart_read_polled(rtems_termios_device_context *base) } } -void zynq_uart_write_polled( - rtems_termios_device_context *base, - char c -) +void zynq_uart_write_char_polled(volatile zynq_uart *regs, char c) { - zynq_uart_context *ctx = (zynq_uart_context *) base; - volatile zynq_uart *regs = ctx->regs; - while ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_TNFUL) != 0) { /* Wait */ } @@ -179,13 +177,12 @@ void zynq_uart_write_polled( regs->tx_rx_fifo = ZYNQ_UART_TX_RX_FIFO_FIFO(c); } -void zynq_uart_reset_tx_flush(zynq_uart_context *ctx) +void zynq_uart_reset_tx_flush(volatile zynq_uart *regs) { - volatile zynq_uart *regs = ctx->regs; - int c = 4; + int c = 4; while (c-- > 0) - zynq_uart_write_polled(&ctx->base, '\r'); + zynq_uart_write_char_polled(regs, '\r'); while ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_TEMPTY) == 0 || (regs->channel_sts & ZYNQ_UART_CHANNEL_STS_TACTIVE) != 0) { |