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/*
* Copyright (c) 2013-2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <info@embedded-brains.de>
*
* 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.
*/
#include <bsp/arm-pl011.h>
static volatile pl011 *pl011_get_regs(rtems_termios_device_context *base)
{
arm_pl011_context *ctx = (arm_pl011_context *) base;
return ctx->regs;
}
bool arm_pl011_probe(rtems_termios_device_context *base)
{
volatile pl011 *regs = pl011_get_regs(base);
regs->uartlcr_h = PL011_UARTLCR_H_WLEN(PL011_UARTLCR_H_WLEN_8);
regs->uartcr = PL011_UARTCR_RXE
| PL011_UARTCR_TXE
| PL011_UARTCR_UARTEN;
return true;
}
static bool pl011_first_open(
struct rtems_termios_tty *tty,
rtems_termios_device_context *base,
struct termios *term,
rtems_libio_open_close_args_t *args
)
{
arm_pl011_context *ctx = (arm_pl011_context *) base;
rtems_termios_set_initial_baud(tty, ctx->initial_baud);
return true;
}
static int pl011_read_polled(rtems_termios_device_context *base)
{
volatile pl011 *regs = pl011_get_regs(base);
if ((regs->uartfr & PL011_UARTFR_RXFE) != 0) {
return -1;
} else {
return PL011_UARTDR_DATA_GET(regs->uartdr);
}
}
void arm_pl011_write_polled(rtems_termios_device_context *base, char c)
{
volatile pl011 *regs = pl011_get_regs(base);
while ((regs->uartfr & PL011_UARTFR_TXFF) != 0) {
/* Wait */
}
regs->uartdr = PL011_UARTDR_DATA(c);
}
static void pl011_write_support_polled(
rtems_termios_device_context *base,
const char *s,
size_t n
)
{
size_t i;
for (i = 0; i < n; ++i) {
arm_pl011_write_polled(base, s[i]);
}
}
const rtems_termios_device_handler arm_pl011_fns = {
.first_open = pl011_first_open,
.poll_read = pl011_read_polled,
.write = pl011_write_support_polled,
.mode = TERMIOS_POLLED
};
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