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/*
* Copyright (c) 2013 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>
#include <bsp/arm-pl011-regs.h>
#include <libchip/sersupp.h>
static volatile pl011 *pl011_get_regs(int minor)
{
const console_tbl *ct = Console_Port_Tbl != NULL ?
Console_Port_Tbl[minor] : &Console_Configuration_Ports[minor];
return (volatile pl011 *) ct->ulCtrlPort1;
}
static void pl011_initialize(int minor)
{
volatile pl011 *regs = pl011_get_regs(minor);
regs->uartlcr_h = PL011_UARTLCR_H_WLEN(PL011_UARTLCR_H_WLEN_8);
regs->uartcr = PL011_UARTCR_RXE
| PL011_UARTCR_TXE
| PL011_UARTCR_UARTEN;
}
static int pl011_first_open(int major, int minor, void *arg)
{
rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg;
struct rtems_termios_tty *tty = (struct rtems_termios_tty *) oc->iop->data1;
console_data *cd = &Console_Port_Data[minor];
const console_tbl *ct = Console_Port_Tbl[minor];
cd->termios_data = tty;
rtems_termios_set_initial_baud(tty, (rtems_termios_baud_t) ct->pDeviceParams);
return 0;
}
static int pl011_last_close(int major, int minor, void *arg)
{
return 0;
}
static int pl011_read_polled(int minor)
{
volatile pl011 *regs = pl011_get_regs(minor);
if ((regs->uartfr & PL011_UARTFR_RXFE) != 0) {
return -1;
} else {
return PL011_UARTDR_DATA_GET(regs->uartdr);
}
}
static void pl011_write_polled(int minor, char c)
{
volatile pl011 *regs = pl011_get_regs(minor);
while ((regs->uartfr & PL011_UARTFR_TXFF) != 0) {
/* Wait */
}
regs->uartdr = PL011_UARTDR_DATA(c);
}
static ssize_t pl011_write_support_polled(
int minor,
const char *s,
size_t n
)
{
ssize_t i = 0;
for (i = 0; i < n; ++i) {
pl011_write_polled(minor, s[i]);
}
return n;
}
static int pl011_set_attribues(int minor, const struct termios *term)
{
return -1;
}
const console_fns arm_pl011_fns = {
.deviceProbe = libchip_serial_default_probe,
.deviceFirstOpen = pl011_first_open,
.deviceLastClose = pl011_last_close,
.deviceRead = pl011_read_polled,
.deviceWrite = pl011_write_support_polled,
.deviceInitialize = pl011_initialize,
.deviceWritePolled = pl011_write_polled,
.deviceSetAttributes = pl011_set_attribues,
.deviceOutputUsesInterrupts = false
};
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