/*
* console.c -- console I/O package
*
* Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
*
* This code is based on the pc386 BSP console.c so the following
* copyright also applies :
*
* (C) Copyright 1997 -
* - NavIST Group - Real-Time Distributed Systems and Industrial Automation
*
* Till Straumann, <strauman@slac.stanford.edu>, 12/20/2001
* separate BSP specific stuff from generics...
*
* http://pandora.ist.utl.pt
*
* Instituto Superior Tecnico * Lisboa * PORTUGAL
* 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 <stdlib.h>
#include <assert.h>
#include <inttypes.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <rtems/bspIo.h>
#include <rtems/libio.h>
#include <rtems/console.h>
#include <rtems/termiostypes.h>
#include <termios.h>
#include <bsp/uart.h>
#include <rtems/bspIo.h> /* printk */
/* Definitions for BSPConsolePort */
/*
* Possible value for console input/output :
* BSP_CONSOLE_PORT_CONSOLE
* BSP_UART_COM1
* BSP_UART_COM2
*/
int BSPConsolePort = BSP_CONSOLE_PORT;
int BSPBaseBaud = BSP_UART_BAUD_BASE;
/*
* TERMIOS_OUTPUT_MODE should be a 'bspopts.h/configure'-able option;
* we could even make it a link-time option (but that would require
* small changes)...
*/
#if defined(USE_POLLED_IO)
#define TERMIOS_OUTPUT_MODE TERMIOS_POLLED
#elif defined(USE_TASK_DRIVEN_IO)
#define TERMIOS_OUTPUT_MODE TERMIOS_TASK_DRIVEN
#else
#define TERMIOS_OUTPUT_MODE TERMIOS_IRQ_DRIVEN
#endif
/*-------------------------------------------------------------------------+
| External Prototypes
+--------------------------------------------------------------------------*/
static int conSetAttr(int minor, const struct termios *);
typedef struct TtySTblRec_ {
char *name;
rtems_irq_hdl isr;
} TtySTblRec, *TtySTbl;
static TtySTblRec ttyS[]={
{ "/dev/ttyS0",
#ifdef BSP_UART_IOBASE_COM1
BSP_uart_termios_isr_com1
#else
0
#endif
},
{ "/dev/ttyS1",
#ifdef BSP_UART_IOBASE_COM2
BSP_uart_termios_isr_com2
#else
0
#endif
},
};
/*-------------------------------------------------------------------------+
| Console device driver INITIALIZE entry point.
+--------------------------------------------------------------------------+
| Initilizes the I/O console (keyboard + VGA display) driver.
+--------------------------------------------------------------------------*/
rtems_device_driver console_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code status;
/*
* The video was initialized in the start.s code and does not need
* to be reinitialized.
*/
/*
* Set up TERMIOS
*/
rtems_termios_initialize();
/*
* Do device-specific initialization
*/
/* RTEMS calls this routine once with 'minor'==0; loop through
* all known instances...
*/
for (minor=0; minor < sizeof(ttyS)/sizeof(ttyS[0]); minor++) {
char *nm;
/*
* Skip ports (possibly not supported by BSP...) we have no ISR for
*/
if ( ! ttyS[minor].isr )
continue;
/*
* Register the device
*/
status = rtems_io_register_name ((nm=ttyS[minor].name), major, minor);
if ( RTEMS_SUCCESSFUL==status && BSPConsolePort == minor) {
printk("Registering /dev/console as minor %" PRIu32 " (==%s)\n",
minor,
ttyS[minor].name);
/* also register an alias */
status = rtems_io_register_name ( (nm="/dev/console"), major, minor);
}
if (status != RTEMS_SUCCESSFUL) {
printk("Error registering %s!\n",nm);
rtems_fatal_error_occurred (status);
}
}
return RTEMS_SUCCESSFUL;
} /* console_initialize */
#if !defined(USE_POLLED_IO)
static int console_first_open(int major, int minor, void *arg)
{
rtems_status_code status;
/* must not open a minor device we have no ISR for */
assert( minor>=0 && minor < sizeof(ttyS)/sizeof(ttyS[0]) && ttyS[minor].isr );
/* 9600-8-N-1 */
BSP_uart_init(minor, 9600, 0);
status = BSP_uart_install_isr(minor, ttyS[minor].isr);
if (!status) {
printk("Error installing serial console interrupt handler for '%s'!\n",
ttyS[minor].name);
rtems_fatal_error_occurred(status);
}
/*
* Pass data area info down to driver
*/
BSP_uart_termios_set(minor, ((rtems_libio_open_close_args_t *)arg)->iop->data1);
/* Enable interrupts on channel */
BSP_uart_intr_ctrl(minor, BSP_UART_INTR_CTRL_TERMIOS);
return 0;
}
#endif
#if !defined(USE_POLLED_IO)
static int console_last_close(int major, int minor, void *arg)
{
BSP_uart_remove_isr(minor, ttyS[minor].isr);
return 0;
}
#endif
/*-------------------------------------------------------------------------+
| Console device driver OPEN entry point
+--------------------------------------------------------------------------*/
rtems_device_driver console_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code status;
static rtems_termios_callbacks cb =
#if defined(USE_POLLED_IO)
{
NULL, /* firstOpen */
NULL, /* lastClose */
NULL, /* pollRead */
BSP_uart_termios_write_polled, /* write */
conSetAttr, /* setAttributes */
NULL, /* stopRemoteTx */
NULL, /* startRemoteTx */
TERMIOS_POLLED /* outputUsesInterrupts */
};
#else
{
console_first_open, /* firstOpen */
console_last_close, /* lastClose */
#ifdef USE_TASK_DRIVEN_IO
BSP_uart_termios_read_com, /* pollRead */
#else
NULL, /* pollRead */
#endif
BSP_uart_termios_write_com, /* write */
conSetAttr, /* setAttributes */
NULL, /* stopRemoteTx */
NULL, /* startRemoteTx */
TERMIOS_OUTPUT_MODE /* outputUsesInterrupts */
};
#endif
status = rtems_termios_open (major, minor, arg, &cb);
if (status != RTEMS_SUCCESSFUL) {
printk("Error opening console device\n");
return status;
}
return RTEMS_SUCCESSFUL;
}
/*-------------------------------------------------------------------------+
| Console device driver CLOSE entry point
+--------------------------------------------------------------------------*/
rtems_device_driver
console_close(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_device_driver res = RTEMS_SUCCESSFUL;
res = rtems_termios_close (arg);
return res;
} /* console_close */
/*-------------------------------------------------------------------------+
| Console device driver READ entry point.
+--------------------------------------------------------------------------+
| Read characters from the I/O console. We only have stdin.
+--------------------------------------------------------------------------*/
rtems_device_driver console_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
return rtems_termios_read (arg);
} /* console_read */
/*-------------------------------------------------------------------------+
| Console device driver WRITE entry point.
+--------------------------------------------------------------------------+
| Write characters to the I/O console. Stderr and stdout are the same.
+--------------------------------------------------------------------------*/
rtems_device_driver console_write(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
return rtems_termios_write (arg);
} /* console_write */
/*
* Handle ioctl request.
*/
rtems_device_driver console_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
/* does the BSP support break callbacks ? */
#if defined(BIOCSETBREAKCB) && defined(BIOCGETBREAKCB)
rtems_libio_ioctl_args_t *ioa=arg;
switch (ioa->command) {
case BIOCSETBREAKCB: return BSP_uart_set_break_cb(minor, ioa);
case BIOCGETBREAKCB: return BSP_uart_get_break_cb(minor, ioa);
default: break;
}
#endif
return rtems_termios_ioctl (arg);
}
static int conSetAttr(
int minor,
const struct termios *t
)
{
rtems_termios_baud_t baud;
baud = rtems_termios_baud_to_number(t->c_cflag & CBAUD);
if ( baud > 115200 )
rtems_fatal_error_occurred (RTEMS_INTERNAL_ERROR);
BSP_uart_set_baud(minor, baud);
return 0;
}
