diff options
Diffstat (limited to 'bsps/m68k/mvme147/console/console.c')
| -rw-r--r-- | bsps/m68k/mvme147/console/console.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/bsps/m68k/mvme147/console/console.c b/bsps/m68k/mvme147/console/console.c new file mode 100644 index 0000000000..f26ca6485a --- /dev/null +++ b/bsps/m68k/mvme147/console/console.c @@ -0,0 +1,203 @@ +/* + * This file contains the MVME147 console IO package. + */ + +/* + * COPYRIGHT (c) 1989-1999. + * On-Line Applications Research Corporation (OAR). + * + * 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. + * + * MVME147 port for TNI - Telecom Bretagne + * by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr) + * May 1996 + * + * This file was taken from the DMV152 bsp + */ + +#define M147_INIT + +#include <rtems/console.h> +#include <rtems/libio.h> +#include <rtems/zilog/z8530.h> +#include <rtems/iosupp.h> +#include <bsp.h> + +/* console_initialize + * + * This routine initializes the console IO driver. + */ +rtems_device_driver console_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +) +{ + rtems_status_code status; + + status = rtems_io_register_name( + "/dev/console", + major, + (rtems_device_minor_number) 0 + ); + + if (status != RTEMS_SUCCESSFUL) + rtems_fatal_error_occurred(status); + + return RTEMS_SUCCESSFUL; +} + +/* inbyte + * + * This routine reads a character from the SCC. + */ +static char inbyte( void ) +{ + uint8_t rr_0; + char ch; + + for ( ; ; ) { + Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); + if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) != 0 ) + break; + } + + Z8x30_READ_DATA( CONSOLE_DATA, ch ); + return ( ch ); +} + +/* outbyte + * + * This routine transmits a character out the SCC. It supports + * XON/XOFF flow control. + */ +static void outbyte( + char ch +) +{ + uint8_t rr_0; + char flow_control; + + for ( ; ; ) { + Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); + if ( (rr_0 & RR_0_TX_BUFFER_EMPTY) != 0 ) + break; + } + + for ( ; ; ) { + Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); + if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ) + break; + + Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); + + if ( flow_control == XOFF ) + do { + do { + Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); + } while ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ); + Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); + } while ( flow_control != XON ); + } + + Z8x30_WRITE_DATA( CONSOLE_DATA, ch ); +} + +/* + * Open entry point + */ +rtems_device_driver console_open( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + return RTEMS_SUCCESSFUL; +} + +/* + * Close entry point + */ +rtems_device_driver console_close( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + return RTEMS_SUCCESSFUL; +} + +/* + * read bytes from the serial port. We only have stdin. + */ +rtems_device_driver console_read( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + rtems_libio_rw_args_t *rw_args; + char *buffer; + int maximum; + int count = 0; + + rw_args = (rtems_libio_rw_args_t *) arg; + + buffer = rw_args->buffer; + maximum = rw_args->count; + + for (count = 0; count < maximum; count++) { + buffer[ count ] = inbyte(); + if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { + buffer[ count++ ] = '\n'; + break; + } + } + + rw_args->bytes_moved = count; + return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; +} + +/* + * write bytes to the serial port. Stdout and stderr are the same. + */ +rtems_device_driver console_write( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + int count; + int maximum; + rtems_libio_rw_args_t *rw_args; + char *buffer; + + rw_args = (rtems_libio_rw_args_t *) arg; + + buffer = rw_args->buffer; + maximum = rw_args->count; + + for (count = 0; count < maximum; count++) { + if ( buffer[ count ] == '\n') { + outbyte('\r'); + } + outbyte( buffer[ count ] ); + } + + rw_args->bytes_moved = maximum; + return 0; +} + +/* + * IO Control entry point + */ +rtems_device_driver console_control( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + return RTEMS_SUCCESSFUL; +} |