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-rw-r--r--bsps/shared/grlib/uart/apbuart_termios.c74
1 files changed, 54 insertions, 20 deletions
diff --git a/bsps/shared/grlib/uart/apbuart_termios.c b/bsps/shared/grlib/uart/apbuart_termios.c
index 9014a1c735..8b5ccd67f6 100644
--- a/bsps/shared/grlib/uart/apbuart_termios.c
+++ b/bsps/shared/grlib/uart/apbuart_termios.c
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
/*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
@@ -6,13 +8,31 @@
* COPYRIGHT (c) 2004.
* Gaisler Research.
*
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
+ * 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 <grlib/apbuart_termios.h>
#include <grlib/apbuart.h>
+#include <grlib/io.h>
#include <bsp.h>
static void apbuart_isr(void *arg)
@@ -23,9 +43,9 @@ static void apbuart_isr(void *arg)
char data;
/* Get all received characters */
- while ((status=uart->regs->status) & APBUART_STATUS_DR) {
+ while ((status=grlib_load_32(&uart->regs->status)) & APBUART_STATUS_DR) {
/* Data has arrived, get new data */
- data = uart->regs->data;
+ data = (char)grlib_load_32(&uart->regs->data);
/* Tell termios layer about new character */
rtems_termios_enqueue_raw_characters(tty, &data, 1);
@@ -33,7 +53,7 @@ static void apbuart_isr(void *arg)
if (
(status & APBUART_STATUS_TE)
- && (uart->regs->ctrl & APBUART_CTRL_TI) != 0
+ && (grlib_load_32(&uart->regs->ctrl) & APBUART_CTRL_TI) != 0
) {
/* write_interrupt will get called from this function */
rtems_termios_dequeue_characters(tty, 1);
@@ -48,23 +68,27 @@ static void apbuart_write_support(
{
struct apbuart_context *uart = (struct apbuart_context *) base;
int sending;
+ uint32_t ctrl;
+
+ ctrl = grlib_load_32(&uart->regs->ctrl);
if (len > 0) {
/* Enable TX interrupt (interrupt is edge-triggered) */
- uart->regs->ctrl |= APBUART_CTRL_TI;
+ ctrl |= APBUART_CTRL_TI;
/* start UART TX, this will result in an interrupt when done */
- uart->regs->data = *buf;
+ grlib_store_32(&uart->regs->data, (uint8_t)*buf);
sending = 1;
} else {
/* No more to send, disable TX interrupts */
- uart->regs->ctrl &= ~APBUART_CTRL_TI;
+ ctrl &= ~APBUART_CTRL_TI;
/* Tell close that we sent everything */
sending = 0;
}
+ grlib_store_32(&uart->regs->ctrl, ctrl);
uart->sending = sending;
}
@@ -115,7 +139,7 @@ static bool apbuart_set_attributes(
rtems_termios_device_lock_acquire(base, &lock_context);
/* Read out current value */
- ctrl = uart->regs->ctrl;
+ ctrl = grlib_load_32(&uart->regs->ctrl);
switch (t->c_cflag & (PARENB|PARODD)) {
case (PARENB|PARODD):
@@ -143,7 +167,7 @@ static bool apbuart_set_attributes(
}
/* Update new settings */
- uart->regs->ctrl = ctrl;
+ grlib_store_32(&uart->regs->ctrl, ctrl);
rtems_termios_device_lock_release(base, &lock_context);
@@ -154,7 +178,7 @@ static bool apbuart_set_attributes(
scaler = (((uart->freq_hz * 10) / (baud * 8)) - 5) / 10;
/* Set new baud rate by setting scaler */
- uart->regs->scaler = scaler;
+ grlib_store_32(&uart->regs->scaler, scaler);
}
return true;
@@ -165,7 +189,8 @@ static void apbuart_set_best_baud(
struct termios *term
)
{
- uint32_t baud = (uart->freq_hz * 10) / ((uart->regs->scaler * 10 + 5) * 8);
+ uint32_t baud = (uart->freq_hz * 10) /
+ ((grlib_load_32(&uart->regs->scaler) * 10 + 5) * 8);
rtems_termios_set_best_baud(term, baud);
}
@@ -178,12 +203,15 @@ static bool apbuart_first_open_polled(
)
{
struct apbuart_context *uart = (struct apbuart_context *) base;
+ uint32_t ctrl;
apbuart_set_best_baud(uart, term);
/* Initialize UART on opening */
- uart->regs->ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE;
- uart->regs->status = 0;
+ ctrl = grlib_load_32(&uart->regs->ctrl);
+ ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE;
+ grlib_store_32(&uart->regs->ctrl, ctrl);
+ grlib_store_32(&uart->regs->status, 0);
return true;
}
@@ -197,6 +225,7 @@ static bool apbuart_first_open_interrupt(
{
struct apbuart_context *uart = (struct apbuart_context *) base;
rtems_status_code sc;
+ uint32_t ctrl;
apbuart_set_best_baud(uart, term);
@@ -210,11 +239,13 @@ static bool apbuart_first_open_interrupt(
uart->sending = 0;
/* Enable Receiver and transmitter and Turn on RX interrupts */
- uart->regs->ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE |
- APBUART_CTRL_RI;
+ ctrl = grlib_load_32(&uart->regs->ctrl);
+ ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE | APBUART_CTRL_RI;
+ grlib_store_32(&uart->regs->ctrl, ctrl);
/* Initialize UART on opening */
- uart->regs->ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE;
- uart->regs->status = 0;
+ ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE;
+ grlib_store_32(&uart->regs->ctrl, ctrl);
+ grlib_store_32(&uart->regs->status, 0);
return true;
}
@@ -227,10 +258,13 @@ static void apbuart_last_close_interrupt(
{
struct apbuart_context *uart = (struct apbuart_context *) base;
rtems_interrupt_lock_context lock_context;
+ uint32_t ctrl;
/* Turn off RX interrupts */
rtems_termios_device_lock_acquire(base, &lock_context);
- uart->regs->ctrl &= ~(APBUART_CTRL_RI);
+ ctrl = grlib_load_32(&uart->regs->ctrl);
+ ctrl &= ~APBUART_CTRL_RI;
+ grlib_store_32(&uart->regs->ctrl, ctrl);
rtems_termios_device_lock_release(base, &lock_context);
/**** Flush device ****/