diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/mrm332/console/console.c')
| -rw-r--r-- | c/src/lib/libbsp/m68k/mrm332/console/console.c | 448 |
1 files changed, 116 insertions, 332 deletions
diff --git a/c/src/lib/libbsp/m68k/mrm332/console/console.c b/c/src/lib/libbsp/m68k/mrm332/console/console.c index da683764d5..a2fc709b2c 100644 --- a/c/src/lib/libbsp/m68k/mrm332/console/console.c +++ b/c/src/lib/libbsp/m68k/mrm332/console/console.c @@ -1,8 +1,12 @@ /* - * This file contains the mrm console IO package. + * This file contains the generic console driver shell used + * by all console drivers using libchip. * - * COPYRIGHT (c) 1989-1999. + * This driver uses the termios pseudo driver. + * + * COPYRIGHT (c) 1989-1997. * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at @@ -11,387 +15,167 @@ * $Id$ */ -#include <stdlib.h> #include <bsp.h> #include <rtems/libio.h> +#include <termios.h> +#include "sci.h" +//#include "../../../../../../rtems/c/src/lib/libbsp/m68k/opti/console/duart.h" +//#include "../../../../../../rtems/c/src/lib/libc/libio_.h" -/* BUFFER_LENGTH must be 2^n for n=1, 2, 3, .... */ -#define BUFFER_LENGTH 256 -#define RTS_STOP_SIZE BUFFER_LENGTH-64 -#define RTS_START_SIZE 16 - -char xmt_buf[BUFFER_LENGTH]; -char rcv_buf[BUFFER_LENGTH]; -/* in: last entry into the buffer; always on a valid character */ -/* out: points to the next character to be pull from the buffer */ -/* in+1=out => buffer empty */ -/* in+2=out => buffer full */ -struct UART_buf { - char *offset; - char *in; - char *out; -}; -static volatile struct UART_buf xmt = { xmt_buf, (char *)0, (char *)1}; -static volatile struct UART_buf rcv = { rcv_buf, (char *)0, (char *)1}; -static volatile char _debug_flag = 0; - -#if 0 -#define SET_RTS(a) {*PORTF0 = (*PORTF0 & ~0x4) | ( (a)? 0 : 0x4); } -#define GET_CTS (!(*PORTF0 & 0x2)) -#else -#define SET_RTS(a) {;} -#define GET_CTS 1 -#endif - -/* _catchSCIint, _catchCTSint, and _catchSPURIOUSint are the - interrupt front-ends */ -extern void _catchSCIint(); -asm(" .text - .align 2 - .globl _catchSCIint -_catchSCIint: - moveml %d0-%d7/%a0-%a6,%sp@- /* save registers */ - jbsr uart_interrupt - moveml %sp@+,%d0-%d7/%a0-%a6 - rts - "); - -extern void _catchCTSint(); -asm(" .text - .align 2 - .globl _catchCTSint -_catchCTSint: - moveml %d0-%d7/%a0-%a6,%sp@- /* save registers */ - jbsr cts_interrupt - moveml %sp@+,%d0-%d7/%a0-%a6 - rts - "); - -extern void _catchSPURIOUSint(); -asm(" .text - .align 2 - .globl _catchSPURIOUSint -_catchSPURIOUSint: - moveml %d0-%d7/%a0-%a6,%sp@- /* save registers */ - jbsr spurious_interrupt - moveml %sp@+,%d0-%d7/%a0-%a6 - rts - "); - -int _spurious_int_counter=0; - -/* note: cts uses int1. If it "bounces", a spurious interrupt is generated */ -void spurious_interrupt(void) { - _spurious_int_counter++; /* there should never be alot of these */ -} - -/* _fake_trap_1 will continue the UART interrupt (%sr *still* - UART_ISR_LEVEL) as a trap #1 to enter the debugger */ - -/* *****fix me; this is for 68000 w/jsr ram exception table ******* */ -asm(" .text - .align 2 -_fake_trap_1: - unlk %a6 /* clear interrupt frame */ - lea %sp@(4),%sp /* remove jbsr instruction */ - moveml %sp@+,%d0-%d7/%a0-%a6 /* pop registers */ - jmp (33*6-12) /* jump exception 1 */ - "); - -/* dispatch UART interrupt */ -void xmit_interrupt(void); -void rcvr_interrupt(void); -void _fake_trap_1(void); - -void uart_interrupt(void) { - /* receiver status bits are cleared by a SCSR read followed - by a SCDR read. transmitter status bits are cleared by - a SCSR read followed by a SCDR write. */ - if ((*SCSR) & (TDRE | TC)) - xmit_interrupt(); - - if ((*SCSR) & (RDRF)) - rcvr_interrupt(); - - if (_debug_flag) { - _debug_flag = 0; /* reset the flag */ - _fake_trap_1(); /* fake a trap #1 */ - } -} - -/* transfer received character to the buffer */ -void rcvr_interrupt(void) { - register char *a, c; - register int length; - - while((*SCSR) & (RDRF)) { - if ((c=*SCDR) == 0x1a) /* use ctl-z to reboot */ - reboot(); -/* else if (c == 0x03) { */ /* use ctl-c to enter debugger */ -/* _debug_flag = 1; */ -/* continue; */ -/* } */ - - *(char *)((int)rcv.offset +(int) - (a=(char *)(((int)rcv.in+1) & ((int)BUFFER_LENGTH-1)))) = c; - if ((char *)(((int)rcv.in+2) & ((int)BUFFER_LENGTH-1)) != rcv.out) - rcv.in=a; - }; - - length = (BUFFER_LENGTH -1) & ( - ( ((int)rcv.out <= (int)rcv.in) ? 0 : BUFFER_LENGTH) - (int)rcv.out - + (int)rcv.in + 1); - if (length >= RTS_STOP_SIZE) - SET_RTS(0); -} - -/* tranfer buffered characters to the UART */ -void xmit_interrupt(void) { - register short int oldsr; - - _CPU_ISR_Disable( oldsr ); /* for when outbyte or flush calls */ - while ((*SCSR) & (TDRE)) { - if ((char *)(((int)xmt.in+1) & ((int)BUFFER_LENGTH-1)) != xmt.out) - /* xmit buffer not empty */ - if (GET_CTS) { - /* send next char */ - *SCDR=*(char *)((int)xmt.offset+(int)xmt.out); - xmt.out= (char *)(((int)xmt.out+1) & ((int)BUFFER_LENGTH-1)); - *SCCR1 = (*SCCR1 & ~(TIE | TCIE)) | (TIE); - } - else { - /* configue CTS interrupt and shutdown xmit interrupts */ - *SCCR1 &= ~(TIE | TCIE); - *PFPAR |= 0x2; - break; - } - else { - /* xmit buffer empty; shutdown interrupts */ - *SCCR1 &= ~(TIE | TCIE); - break; - } - } - _CPU_ISR_Enable( oldsr ); -} - -void cts_interrupt(void) { - register short int oldsr; - - _CPU_ISR_Disable( oldsr ); /* for when outbyte calls */ - - *PFPAR &= ~0x2; - *SCCR1 = (*SCCR1 & ~(TIE | TCIE)) | (TIE); - - _CPU_ISR_Enable( oldsr ); -} - - - -/* transfer character from the buffer */ -char inbyte(void) { - register char a; - register int length; - - while ((char *)(((int)rcv.in+1) & ((int)BUFFER_LENGTH-1))== rcv.out); - a=*(char *)((int)rcv.offset+(int)rcv.out); - rcv.out= (char *)(((int)rcv.out+1) & ((int)BUFFER_LENGTH-1)); - length = (BUFFER_LENGTH -1) & ( - ( ((int)rcv.out <= (int)rcv.in) ? 0 : BUFFER_LENGTH) - (int)rcv.out - + (int)rcv.in + 1); - if (length < RTS_START_SIZE) - SET_RTS(1); - return (a); -} - -/* once room is avaliable in the buffer, transfer - the character into the buffer and enable - the xmtr interrupt */ -void outbyte(char c) { - register char *a; - - while ((char *)(((int)xmt.in+2) & ((int)BUFFER_LENGTH-1)) == xmt.out); - *(char *)((int)xmt.offset+(int) - (a=(char *)(((int)xmt.in+1) & ((int)BUFFER_LENGTH-1))))=c; - xmt.in=a; - - if (!(*SCCR1 & (TIE | TCIE)) && (!(*PFPAR & 0x2)) ) - /* if neither interrupts are running, */ - xmit_interrupt(); /* we need to restart the xmiter */ -} - -void _UART_flush(void) { - /* loop till xmt buffer empty. Works with interrupts disabled */ - while ((char *)(((int)xmt.in+1) & ((int)BUFFER_LENGTH-1)) != xmt.out) - xmit_interrupt(); - /* loop till UART buffer empty */ - while ( (*SCSR & TC) == 0 ); -} - -/* console_initialize - * - * This routine initializes the console IO driver. - * - * Input parameters: NONE - * - * Output parameters: NONE - * - * Return values: - */ - -void console_init() -{ - *QSMCR = ( SAM(QSM_IARB,0,IARB) ); - *QILR = ( SAM(ISRL_QSPI,4,ILQSPI) | SAM(ISRL_SCI,0,ILSCI) ); - *QIVR = ( SAM(EFI_QIVR,0,INTV) ); - - *SCCR0 = ( (int)( SYS_CLOCK/SCI_BAUD/32.0+0.5 ) & 0x1fff ); - *SCCR1 = ( RIE | TE | RE ); - - set_vector(_catchSPURIOUSint, EFI_SPINT, 1); - set_vector(_catchSCIint, EFI_QIVR, 1); - /* set_vector(_catchCTSint, EFI_INT1, 1); */ -} - -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; -} - -/* is_character_ready +/*PAGE * - * This routine returns TRUE if a character is available. + * console_open * - * Input parameters: NONE + * open a port as a termios console. * - * Output parameters: NONE + * the console is opened in bsp_postdriver_hook() in bsppost.c * - * Return values: */ -rtems_boolean is_character_ready( - char *ch -) -{ - if ((char *)(((int)rcv.in+1) & ((int)BUFFER_LENGTH-1))== rcv.out) - return(FALSE); - else - return(TRUE); -} - -/* - * Open entry point - */ - rtems_device_driver console_open( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { - return RTEMS_SUCCESSFUL; + rtems_status_code status; + + /* the console is opened three times at startup */ + /* for standard input, output, and error */ + + /* Get correct callback structure for the device */ + + /* argument of FALSE gives us interrupt driven serial io */ + /* argument of TRUE gives us polling based serial io */ + + /* SCI internal uart */ + + status = rtems_termios_open( major, minor, arg, SciGetTermiosHandlers( TRUE ) ); + + return status; } -/* - * Close entry point +/*PAGE + * + * console_close + * + * This routine closes a port that has been opened as console. */ - + rtems_device_driver console_close( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { - return RTEMS_SUCCESSFUL; + return rtems_termios_close (arg); } -/* - * read bytes from the serial port. We only have stdin. +/*PAGE + * + * console_read + * + * This routine uses the termios driver to read a character. */ - + 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; - - 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; + return rtems_termios_read (arg); } -/* - * write bytes to the serial port. Stdout and stderr are the same. +/*PAGE + * + * console_write + * + * this routine uses the termios driver to write a character. */ - + 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; + return rtems_termios_write (arg); } -/* - * IO Control entry point +/*PAGE + * + * console_control + * + * this routine uses the termios driver to process io */ - + rtems_device_driver console_control( rtems_device_major_number major, rtems_device_minor_number minor, void * arg ) { + return rtems_termios_ioctl (arg); +} + +/*PAGE + * + * console_initialize + * + * Routine called to initialize the console device driver. + */ + +rtems_device_driver console_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor_arg, + void *arg +) +{ + rtems_status_code status; + + /* + * initialize the termio interface. + */ + rtems_termios_initialize(); + + + /* + * register the SCI device name for termios + * do this over in the sci driver init routine? + */ + + status = rtems_io_register_name( "/dev/sci", major, 0 ); + + if (status != RTEMS_SUCCESSFUL) + { + rtems_fatal_error_occurred(status); + } + + + /* + * Link the uart device to the console device + */ + +#if 1 + status = rtems_io_register_name( "/dev/console", major, 0 ); + + if (status != RTEMS_SUCCESSFUL) + { + rtems_fatal_error_occurred(status); + } +#else + if ( link( "/dev/sci", "/dev/console") < 0 ) + { + rtems_fatal_error_occurred( RTEMS_IO_ERROR ); + } +#endif + + /* + * Console Initialize Succesful + */ + return RTEMS_SUCCESSFUL; } + |