diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/gen68360/console/console.c')
| -rw-r--r-- | c/src/lib/libbsp/m68k/gen68360/console/console.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/gen68360/console/console.c b/c/src/lib/libbsp/m68k/gen68360/console/console.c new file mode 100644 index 0000000000..e346b99088 --- /dev/null +++ b/c/src/lib/libbsp/m68k/gen68360/console/console.c @@ -0,0 +1,311 @@ +/* + * Initialize SMC1 for console IO. + * + * Based on the `gen68302' board support package, and covered by the + * original distribution terms. + * + * W. Eric Norum + * Saskatchewan Accelerator Laboratory + * University of Saskatchewan + * Saskatoon, Saskatchewan, CANADA + * eric@skatter.usask.ca + * + * $Id$ + */ + +/* + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + */ + +#define GEN68360_INIT + +#include <bsp.h> +#include <rtems/libio.h> +#include "mc68360.h" + +/* console_initialize + * + * This routine initializes the console IO driver. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: + */ + +/* + * Place buffer descriptors at end of User Data/BD space in dual-port RAM + */ +#define consoleRxBd ((volatile m360BufferDescriptor_t *)((char *)m360.dpram1 + \ + (sizeof(m360.dpram2) - 2*sizeof(m360BufferDescriptor_t)))) +#define consoleTxBd ((volatile m360BufferDescriptor_t *)((char *)m360.dpram1 + \ + (sizeof(m360.dpram2) - sizeof(m360BufferDescriptor_t)))) + +/* + * I/O buffers can be in ordindary RAM + */ +static volatile char rxBuf, txBuf; + +rtems_device_driver console_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +) +{ + rtems_status_code status; + + /* + * Configure port B pins to enable SMTXD1 and SMRXD1 pins + */ + m360.pbpar |= 0xC0; + m360.pbdir &= ~0xC0; + m360.pbodr &= ~0xC0; + + /* + * Set up BRG1 (9,600 baud) + */ + m360.brgc1 = M360_BRG_RST; + m360.brgc1 = M360_BRG_EN | M360_BRG_EXTC_BRGCLK | M360_BRG_9600; + + /* + * Put SMC1 in NMSI mode, connect SMC1 to BRG1 + */ + m360.simode |= M360_SI_SMC1_BRG1; + + /* + * Set up SMC1 parameter RAM common to all protocols + */ + m360.smc1p.rbase = (char *)consoleRxBd - (char *)&m360; + m360.smc1p.tbase = (char *)consoleTxBd - (char *)&m360; + m360.smc1p.rfcr = M360_RFCR_MOT | M360_RFCR_DMA_SPACE; + m360.smc1p.tfcr = M360_TFCR_MOT | M360_TFCR_DMA_SPACE; + m360.smc1p.mrblr = 1; + + /* + * Set up SMC1 parameter RAM UART-specific parameters + */ + m360.smc1p.un.uart.max_idl = 0; + m360.smc1p.un.uart.brklen = 0; + m360.smc1p.un.uart.brkec = 0; + m360.smc1p.un.uart.brkcr = 0; + + /* + * Set up the Receive Buffer Descriptor + */ + consoleRxBd->status = M360_BD_EMPTY | M360_BD_WRAP; + consoleRxBd->length = 0; + consoleRxBd->buffer = &rxBuf; + + /* + * Setup the Transmit Buffer Descriptor + */ + consoleTxBd->length = 1; + consoleTxBd->status = M360_BD_WRAP; + consoleTxBd->buffer = &txBuf; + + /* + * Set up SMC1 general and protocol-specific mode registers + */ + m360.smc1.smce = ~0; /* Clear any pending events */ + m360.smc1.smcm = 0; /* Mask all interrupt/event sources */ + m360.smc1.smcmr = M360_SMCMR_CLEN(9) | M360_SMCMR_SM_UART; + + /* + * Send "Init parameters" command + */ + m360.cr = M360_CR_OP_INIT_RX_TX | M360_CR_CHAN_SMC1 | M360_CR_FLG; + while (m360.cr & M360_CR_FLG) + continue; + + /* + * Enable receiver and transmitter + */ + m360.smc1.smcmr |= M360_SMCMR_TEN | M360_SMCMR_REN; + + 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 + * + * Check to see if a character is available on the console port. If so, + * then return a TRUE (along with the character). Otherwise return FALSE. + * + * Input parameters: pointer to location in which to return character + * + * Output parameters: character (if available) + * + * Return values: TRUE - character available + * FALSE - no character available + */ + +rtems_boolean is_character_ready( + char *ch /* -> character */ +) +{ + if (consoleRxBd->status & M360_BD_EMPTY) + return FALSE; + *ch = rxBuf; + consoleRxBd->status = M360_BD_EMPTY | M360_BD_WRAP; + return TRUE; +} + + +/* inbyte + * + * Receive a character from the console port + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: character read + */ + +char inbyte( void ) +{ + char ch; + + while (is_character_ready (&ch) == FALSE) + continue; + return ch; +} + + +/* outbyte + * + * Transmit a character to the console serial port + * + * Input parameters: + * ch - character to be transmitted + * + * Output parameters: NONE + */ + +void outbyte( + char ch +) +{ + if (ch == '\n') + outbyte('\r'); + while (consoleTxBd->status & M360_BD_READY) + continue; + txBuf = ch; + consoleTxBd->status = M360_BD_READY | M360_BD_WRAP; +} + +/* + * 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'; + buffer[ count ] = 0; + 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; +} |