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/*
* Copyright (c) 2012 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@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.
*/
/*
* Console driver for Lauterbach Trace32 Simulator. The implementation is
* based on the example in "demo/powerpc/etc/terminal/terminal_mpc85xx.cmm" in
* the Trace32 system directory.
*/
#include <rtems/bspIo.h>
#include <rtems/libio.h>
#include <rtems/termiostypes.h>
#include <libchip/serial.h>
#include <libchip/sersupp.h>
#define CONSOLE_COUNT 1
volatile unsigned char messagebufferin [256];
volatile unsigned char messagebufferout [256];
static void initialize(int minor)
{
/* Nothing to do */
}
static int 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];
cd->termios_data = tty;
rtems_termios_set_initial_baud(tty, 115200);
return 0;
}
static int last_close(int major, int minor, void *arg)
{
return 0;
}
static int read_polled(int minor)
{
static int bufsize;
static int bufindex;
int c;
if (bufsize == 0) {
int new_bufsize = messagebufferin [0];
if (new_bufsize != 0) {
bufsize = new_bufsize;
bufindex = 0;
} else {
return -1;
}
}
c = messagebufferin [4 + bufindex];
++bufindex;
if (bufindex >= bufsize) {
messagebufferin [0] = 0;
bufsize = 0;
}
return c;
}
static void write_polled(int minor, char c)
{
while (messagebufferout[0] != 0) {
/* Wait for ready */
}
messagebufferout [4] = (unsigned char) c;
messagebufferout [0] = 1;
}
static ssize_t write_support_polled(
int minor,
const char *s,
size_t n
)
{
ssize_t i = 0;
for (i = 0; i < n; ++i) {
write_polled(minor, s [i]);
}
return n;
}
static int set_attribues(int minor, const struct termios *term)
{
return -1;
}
static const console_fns t32mppc_console_fns = {
.deviceProbe = libchip_serial_default_probe,
.deviceFirstOpen = first_open,
.deviceLastClose = last_close,
.deviceRead = read_polled,
.deviceWrite = write_support_polled,
.deviceInitialize = initialize,
.deviceWritePolled = write_polled,
.deviceSetAttributes = set_attribues,
.deviceOutputUsesInterrupts = false
};
unsigned long Console_Configuration_Count = CONSOLE_COUNT;
console_tbl Console_Configuration_Ports [CONSOLE_COUNT] = {
{
.sDeviceName = "/dev/ttyS0",
.deviceType = SERIAL_CUSTOM,
.pDeviceFns = &t32mppc_console_fns
}
};
static void output_char(char c)
{
const console_fns *con = Console_Port_Tbl [Console_Port_Minor]->pDeviceFns;
if (c == '\n') {
con->deviceWritePolled((int) Console_Port_Minor, '\r');
}
con->deviceWritePolled((int) Console_Port_Minor, c);
}
BSP_output_char_function_type BSP_output_char = output_char;
BSP_polling_getchar_function_type BSP_poll_char = NULL;
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