diff options
Diffstat (limited to 'c/src/lib/libbsp/bfin/shared/console/console.c')
| -rw-r--r-- | c/src/lib/libbsp/bfin/shared/console/console.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/bfin/shared/console/console.c b/c/src/lib/libbsp/bfin/shared/console/console.c new file mode 100644 index 0000000000..b8cd15d822 --- /dev/null +++ b/c/src/lib/libbsp/bfin/shared/console/console.c @@ -0,0 +1,233 @@ +/* Console Driver for eZKit533 + * + * Copyright (c) 2006 by Atos Automacao Industrial Ltda. + * written by Alain Schaefer <alain.schaefer@easc.ch> + * and Antonio Giovanini <antonio@atos.com.br> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + + +#include <bsp.h> +#include <rtems/libio.h> +#include <stdlib.h> +#include <assert.h> + + +/* + * console_outbyte_polled + * + * This routine transmits a character using polling. + */ + +void console_outbyte_polled(int port, char ch); + +/* body is in console-io.c */ + +/* + * console_inbyte_nonblocking + * + * This routine polls for a character. + */ + +int console_inbyte_nonblocking( int port ); +/* body is in console-io.c */ + +/* + * + * This routine initialize uart hardware + */ + +void console_initialize_hardware(void); + +/* body is in console-io.c */ + +/* + * Interrupt driven console IO + */ + +#if (CONSOLE_USE_INTERRUPTS) + +/* + * Buffers between task and ISRs + */ + +#include <rtems/ringbuf.h> + +void *console_termios_data[ 1 ]; + +/* + * console_initialize_interrupts + * + * This routine initializes the console's receive and transmit + * ring buffers and loads the appropriate vectors to handle the interrupts. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: NONE + */ +void console_initialize_interrupts( void ); +/* body is in console-io.c */ + +/* + * console_outbyte_interrupt + * + * This routine transmits a character out. + * + * Input parameters: + * port - port to transmit character to + * ch - character to be transmitted + * + * Output parameters: NONE + * + * Return values: NONE + */ + +void console_outbyte_interrupt(int port, char ch); + +#endif /* CONSOLE_USE_INTERRUPTS */ + +/* + * Console Termios Support Entry Points + * + */ + +int console_write_support (int minor, const char *buf, int len) +{ + int nwrite = 0; + + while (nwrite < len) { +#if (CONSOLE_USE_INTERRUPTS) + console_outbyte_interrupt( minor, *buf++ ); +#else + console_outbyte_polled( minor, *buf++ ); +#endif + nwrite++; + } + return nwrite; +} + +/* + * Console Device Driver Entry Points + * + */ + +rtems_device_driver console_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +) +{ + rtems_status_code status; + + rtems_termios_initialize(); + + /* + * Register Device Names + */ + + status = rtems_io_register_name( "/dev/console", major, 0 ); + if (status != RTEMS_SUCCESSFUL) + rtems_fatal_error_occurred(status); + + /* + * Initialize Hardware + */ + +#if (CONSOLE_USE_INTERRUPTS) + console_initialize_interrupts(); +#endif + + console_initialize_hardware(); + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver console_open( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + rtems_status_code sc; +#if (CONSOLE_USE_INTERRUPTS) + rtems_libio_open_close_args_t *args = arg; + static const rtems_termios_callbacks intrCallbacks = { + NULL, /* firstOpen */ + NULL, /* lastClose */ + NULL, /* pollRead */ + console_write_support, /* write */ + NULL, /* setAttributes */ + NULL, /* stopRemoteTx */ + NULL, /* startRemoteTx */ + 0 /* outputUsesInterrupts */ + }; +#else + static const rtems_termios_callbacks pollCallbacks = { + NULL, /* firstOpen */ + NULL, /* lastClose */ + console_inbyte_nonblocking, /* pollRead */ + console_write_support, /* write */ + NULL, /* setAttributes */ + NULL, /* stopRemoteTx */ + NULL, /* startRemoteTx */ + 0 /* outputUsesInterrupts */ + }; +#endif + + assert( minor <= 1 ); + if ( minor > 2 ) + return RTEMS_INVALID_NUMBER; + +#if (CONSOLE_USE_INTERRUPTS) + sc = rtems_termios_open (major, minor, arg, &intrCallbacks); + + console_termios_data[ minor ] = args->iop->data1; +#else + sc = rtems_termios_open (major, minor, arg, &pollCallbacks); +#endif + + return RTEMS_SUCCESSFUL; +} + +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); +} |