diff options
Diffstat (limited to 'bsps/aarch64/xilinx-versal/dev/serial/versal-uart-polled.c')
| -rw-r--r-- | bsps/aarch64/xilinx-versal/dev/serial/versal-uart-polled.c | 48 |
1 files changed, 7 insertions, 41 deletions
diff --git a/bsps/aarch64/xilinx-versal/dev/serial/versal-uart-polled.c b/bsps/aarch64/xilinx-versal/dev/serial/versal-uart-polled.c index be46c99efd..9453dc248b 100644 --- a/bsps/aarch64/xilinx-versal/dev/serial/versal-uart-polled.c +++ b/bsps/aarch64/xilinx-versal/dev/serial/versal-uart-polled.c @@ -1,7 +1,7 @@ /* SPDX-License-Identifier: BSD-2-Clause */ /* - * Copyright (C) 2021 Gedare Bloom <gedare@rtems.org> + * Copyright (C) 2021 Gedare Bloom <gedare@rtems.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -68,7 +68,7 @@ int32_t versal_cal_baud_rate( return -1; } - /* + /* * The UART clock cannot be larger than 16*65535*baudrate. * Could maybe use an estimate (inputclk / 2**16) to save a division. * This invariant gets checked below, by ensuring ibdiv < 2**16. @@ -78,7 +78,7 @@ int32_t versal_cal_baud_rate( * The UART clock cannot be more than 5/3 times faster than the LPD_LSBUS_CLK * - TODO? */ - + /* * The baud rate divisor is a 16-bit integer and 6-bit fractional part. * It is equal to the UART clock / (16 * baudrate). @@ -138,7 +138,8 @@ int versal_uart_initialize(rtems_termios_device_context *base) } /* Line control: 8-bit word length, no parity, no FIFO, 1 stop bit */ - regs->uartlcr_h = VERSAL_UARTLCR_H_WLEN( VERSAL_UARTLCR_H_WLEN_8 ); + regs->uartlcr_h = VERSAL_UARTLCR_H_WLEN( VERSAL_UARTLCR_H_WLEN_8 ) + | VERSAL_UARTLCR_H_FEN; /* Control: receive, transmit, uart enable, no CTS, no RTS, no loopback */ regs->uartcr = VERSAL_UARTCR_RXE @@ -151,23 +152,6 @@ int versal_uart_initialize(rtems_termios_device_context *base) return 0; } -static bool versal_uart_first_open( - struct rtems_termios_tty *tty, - rtems_termios_device_context *base, - struct termios *term, - rtems_libio_open_close_args_t *args -) -{ - int rc = versal_uart_initialize(base); - if ( rc < 0 ) { - return false; - } - - rtems_termios_set_initial_baud(tty, VERSAL_UART_DEFAULT_BAUD); - - return true; -} - int versal_uart_read_polled(rtems_termios_device_context *base) { volatile versal_uart *regs = versal_uart_get_regs(base); @@ -204,25 +188,7 @@ void versal_uart_reset_tx_flush(rtems_termios_device_context *base) while ((regs->uartfr & VERSAL_UARTFR_TXFE) == 0) { /* Wait for empty */ } -} - -static void versal_uart_write_support( - rtems_termios_device_context *base, - const char *s, - size_t n -) -{ - size_t i; - - for (i = 0; i < n; i++) { - versal_uart_write_polled(base, s[i]); + while ((regs->uartfr & VERSAL_UARTFR_BUSY) != 0) { + /* Wait for empty */ } } - -const rtems_termios_device_handler versal_uart_handler = { - .first_open = versal_uart_first_open, - .write = versal_uart_write_support, - .poll_read = versal_uart_read_polled, - .mode = TERMIOS_POLLED -}; - |