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/*
* Console driver for Milkymist
*
* 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.
*
* COPYRIGHT (c) 2010 Sebastien Bourdeauducq
*/
#include <unistd.h>
#include <termios.h>
#include <rtems.h>
#include <rtems/libio.h>
#include <rtems/console.h>
#include <rtems/termiostypes.h>
#include <bsp/irq-generic.h>
#include "../include/system_conf.h"
#include "uart.h"
BSP_output_char_function_type BSP_output_char = BSP_uart_polled_write;
BSP_polling_getchar_function_type BSP_poll_char = BSP_uart_polled_read;
static struct rtems_termios_tty *tty;
static int mmconsole_first_open(int major, int minor, void *arg)
{
tty = ((rtems_libio_open_close_args_t *) arg)->iop->data1;
return rtems_termios_set_initial_baud(tty, UART_BAUD_RATE);
}
static int mmconsole_last_close(int major, int minor, void *arg)
{
return 0;
}
static int mmconsole_set_attributes(int minor, const struct termios *t)
{
int baud;
switch (t->c_cflag & CBAUD) {
case B0:
baud = 0;
break;
case B50:
baud = 50;
break;
case B75:
baud = 75;
break;
case B110:
baud = 110;
break;
case B134:
baud = 134;
break;
case B150:
baud = 150;
break;
case B200:
baud = 200;
break;
case B300:
baud = 300;
break;
case B600:
baud = 600;
break;
case B1200:
baud = 1200;
break;
case B1800:
baud = 1800;
break;
case B2400:
baud = 2400;
break;
case B4800:
baud = 4800;
break;
case B9600:
baud = 9600;
break;
case B19200:
baud = 19200;
break;
case B38400:
baud = 38400;
break;
case B57600:
baud = 57600;
break;
case B115200:
baud = 115200;
break;
case B230400:
baud = 230400;
break;
case B460800:
baud = 460800;
break;
default:
baud = -1;
break;
}
if (baud > 0)
MM_WRITE(MM_UART_DIV, MM_READ(MM_FREQUENCY)/baud/16);
return 0;
}
static ssize_t mmconsole_write(int minor, const char *buf, size_t n)
{
if (n > 0) {
MM_WRITE(MM_UART_RXTX, *buf);
}
return 0;
}
static rtems_isr mmconsole_interrupt(rtems_vector_number n)
{
char c;
while (MM_READ(MM_UART_STAT) & UART_STAT_RX_EVT) {
c = MM_READ(MM_UART_RXTX);
MM_WRITE(MM_UART_STAT, UART_STAT_RX_EVT);
rtems_termios_enqueue_raw_characters(tty, &c, 1);
}
if (MM_READ(MM_UART_STAT) & UART_STAT_TX_EVT) {
MM_WRITE(MM_UART_STAT, UART_STAT_TX_EVT);
rtems_termios_dequeue_characters(tty, 1);
}
lm32_interrupt_ack(1 << MM_IRQ_UART);
}
static const rtems_termios_callbacks mmconsole_callbacks = {
.firstOpen = mmconsole_first_open,
.lastClose = mmconsole_last_close,
.pollRead = NULL,
.write = mmconsole_write,
.setAttributes = mmconsole_set_attributes,
.stopRemoteTx = NULL,
.startRemoteTx = NULL,
.outputUsesInterrupts = TERMIOS_IRQ_DRIVEN
};
rtems_device_driver console_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code status;
rtems_isr_entry dummy;
rtems_termios_initialize();
status = rtems_io_register_name("/dev/console", major, 0);
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
rtems_interrupt_catch(mmconsole_interrupt, MM_IRQ_UART, &dummy);
bsp_interrupt_vector_enable(MM_IRQ_UART);
MM_WRITE(MM_UART_CTRL, UART_CTRL_RX_INT|UART_CTRL_TX_INT);
return RTEMS_SUCCESSFUL;
}
rtems_device_driver console_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
return rtems_termios_open(major, minor, arg, &mmconsole_callbacks);
}
rtems_device_driver console_close(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
return rtems_termios_close(arg);
}
rtems_device_driver console_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
return rtems_termios_read(arg);
}
rtems_device_driver console_write(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
return rtems_termios_write(arg);
}
rtems_device_driver console_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
return rtems_termios_ioctl(arg);
}
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