/* * * COPYRIGHT (c) 1989-1998. * 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 * http://www.OARcorp.com/rtems/license.html. * * $Id$ */ #ifndef _MC68681_P_H_ #define _MC68681_P_H_ #ifdef __cplusplus extern "C" { #endif /* * mc68681 register offsets Read/Write Addresses */ #define MC68681_MODE_REG_1A 0 /* MR1A-MR Prior to Read */ #define MC68681_MODE_REG_2A 0 /* MR2A-MR After Read */ #define MC68681_COUNT_MODE_CURRENT_MSB 6 /* CTU */ #define MC68681_COUNTER_TIMER_UPPER_REG 6 /* CTU */ #define MC68681_COUNT_MODE_CURRENT_LSB 7 /* CTL */ #define MC68681_COUNTER_TIMER_LOWER_REG 7 /* CTL */ #define MC68681_INTERRUPT_VECTOR_REG 12 /* IVR */ #define MC68681_MODE_REG_1B 8 /* MR1B-MR Prior to Read */ #define MC68681_MODE_REG_2B 8 /* MR2BA-MR After Read */ /* * mc68681 register offsets Read Only Addresses */ #define MC68681_STATUS_REG_A 1 /* SRA */ #define MC68681_MASK_ISR_REG 2 /* MISR */ #define MC68681_RECEIVE_BUFFER_A 3 /* RHRA */ #define MC68681_INPUT_PORT_CHANGE_REG 4 /* IPCR */ #define MC68681_INTERRUPT_STATUS_REG 5 /* ISR */ #define MC68681_STATUS_REG_B 9 /* SRB */ #define MC68681_RECEIVE_BUFFER_B 11 /* RHRB */ #define MC68681_INPUT_PORT 13 /* IP */ #define MC68681_START_COUNT_CMD 14 /* SCC */ #define MC68681_STOP_COUNT_CMD 15 /* STC */ /* * mc68681 register offsets Write Only Addresses */ #define MC68681_CLOCK_SELECT_REG_A 1 /* CSRA */ #define MC68681_COMMAND_REG_A 2 /* CRA */ #define MC68681_TRANSMIT_BUFFER_A 3 /* THRA */ #define MC68681_AUX_CTRL_REG 4 /* ACR */ #define MC68681_INTERRUPT_MASK_REG 5 /* IMR */ #define MC68681_CLOCK_SELECT_REG_B 9 /* CSRB */ #define MC68681_COMMAND_REG_B 10 /* CRB */ #define MC68681_TRANSMIT_BUFFER_B 11 /* THRB */ #define MC68681_OUTPUT_PORT_CONFIG_REG 13 /* OPCR */ #define MC68681_OUTPUT_PORT_SET_REG 14 /* SOPBC */ #define MC68681_OUTPUT_PORT_RESET_BITS 15 /* COPBC */ /* * DUART Command Register Definitions: * * MC68681_COMMAND_REG_A,MC68681_COMMAND_REG_B */ #define MC68681_MODE_REG_ENABLE_RX 0x01 #define MC68681_MODE_REG_DISABLE_RX 0x02 #define MC68681_MODE_REG_ENABLE_TX 0x04 #define MC68681_MODE_REG_DISABLE_TX 0x08 #define MC68681_MODE_REG_RESET_MR_PTR 0x10 #define MC68681_MODE_REG_RESET_RX 0x20 #define MC68681_MODE_REG_RESET_TX 0x30 #define MC68681_MODE_REG_RESET_ERROR 0x40 #define MC68681_MODE_REG_RESET_BREAK 0x50 #define MC68681_MODE_REG_START_BREAK 0x60 #define MC68681_MODE_REG_STOP_BREAK 0x70 #define MC68681_MODE_REG_SET_RX_BRG 0x80 #define MC68681_MODE_REG_CLEAR_RX_BRG 0x90 #define MC68681_MODE_REG_SET_TX_BRG 0xa0 #define MC68681_MODE_REG_CLEAR_TX_BRG 0xb0 #define MC68681_MODE_REG_SET_STANDBY 0xc0 #define MC68681_MODE_REG_SET_ACTIVE 0xd0 /* * Mode Register Definitions * * MC68681_MODE_REG_1A * MC68681_MODE_REG_1B */ #define MC68681_5BIT_CHARS 0x00 #define MC68681_6BIT_CHARS 0x01 #define MC68681_7BIT_CHARS 0x02 #define MC68681_8BIT_CHARS 0x03 #define MC68681_ODD_PARITY 0x00 #define MC68681_EVEN_PARITY 0x04 #define MC68681_WITH_PARITY 0x00 #define MC68681_FORCE_PARITY 0x08 #define MC68681_NO_PARITY 0x10 #define MC68681_MULTI_DROP 0x18 #define MC68681_ERR_MODE_CHAR 0x00 #define MC68681_ERR_MODE_BLOCK 0x20 #define MC68681_RX_INTR_RX_READY 0x00 #define MC68681_RX_INTR_FFULL 0x40 #define MC68681_NO_RX_RTS_CTL 0x00 #define MC68681_RX_RTS_CTRL 0x80 /* * Mode Register Definitions * * MC68681_MODE_REG_2A * MC68681_MODE_REG_2B */ #define MC68681_STOP_BIT_LENGTH__563 0x00 #define MC68681_STOP_BIT_LENGTH__625 0x01 #define MC68681_STOP_BIT_LENGTH__688 0x02 #define MC68681_STOP_BIT_LENGTH__75 0x03 #define MC68681_STOP_BIT_LENGTH__813 0x04 #define MC68681_STOP_BIT_LENGTH__875 0x05 #define MC68681_STOP_BIT_LENGTH__938 0x06 #define MC68681_STOP_BIT_LENGTH_1 0x07 #define MC68681_STOP_BIT_LENGTH_1_563 0x08 #define MC68681_STOP_BIT_LENGTH_1_625 0x09 #define MC68681_STOP_BIT_LENGTH_1_688 0x0a #define MC68681_STOP_BIT_LENGTH_1_75 0x0b #define MC68681_STOP_BIT_LENGTH_1_813 0x0c #define MC68681_STOP_BIT_LENGTH_1_875 0x0d #define MC68681_STOP_BIT_LENGTH_1_938 0x0e #define MC68681_STOP_BIT_LENGTH_2 0x0f #define MC68681_CTS_ENABLE_TX 0x10 #define MC68681_TX_RTS_CTRL 0x20 #define MC68681_CHANNEL_MODE_NORMAL 0x00 #define MC68681_CHANNEL_MODE_ECHO 0x40 #define MC68681_CHANNEL_MODE_LOCAL_LOOP 0x80 #define MC68681_CHANNEL_MODE_REMOTE_LOOP 0xc0 /* * Status Register Definitions * * MC68681_STATUS_REG_A, MC68681_STATUS_REG_B */ #define MC68681_RX_READY 0x01 #define MC68681_FFULL 0x02 #define MC68681_TX_READY 0x04 #define MC68681_TX_EMPTY 0x08 #define MC68681_OVERRUN_ERROR 0x10 #define MC68681_PARITY_ERROR 0x20 #define MC68681_FRAMING_ERROR 0x40 #define MC68681_RECEIVED_BREAK 0x80 /* * Interupt Status Register Definitions. * * MC68681_INTERRUPT_STATUS_REG */ /* * Interupt Mask Register Definitions * * MC68681_INTERRUPT_MASK_REG */ #define MC68681_IR_TX_READY_A 0x01 #define MC68681_IR_RX_READY_A 0x02 #define MC68681_IR_BREAK_A 0x04 #define MC68681_IR_COUNTER_READY 0x08 #define MC68681_IR_TX_READY_B 0x10 #define MC68681_IR_RX_READY_B 0x20 #define MC68681_IR_BREAK_B 0x40 #define MC68681_IR_INPUT_PORT_CHANGE 0x80 /* * Status Register Definitions. * * MC68681_STATUS_REG_A,MC68681_STATUS_REG_B */ #define MC68681_STATUS_RXRDY 0x01 #define MC68681_STATUS_FFULL 0x02 #define MC68681_STATUS_TXRDY 0x04 #define MC68681_STATUS_TXEMT 0x08 #define MC68681_STATUS_OVERRUN_ERROR 0x10 #define MC68681_STATUS_PARITY_ERROR 0x20 #define MC68681_STATUS_FRAMING_ERROR 0x40 #define MC68681_STATUS_RECEIVED_BREAK 0x80 /* * Definitions for the Interrupt Vector Register: * * MC68681_INTERRUPT_VECTOR_REG */ #define MC68681_INTERRUPT_VECTOR_INIT 0x0f /* * Definitions for the Auxiliary Control Register * * MC68681_AUX_CTRL_REG */ #define MC68681_AUX_BRG_SET1 0x00 #define MC68681_AUX_BRG_SET2 0x80 /* * Per chip context control */ typedef struct _mc68681_context { int mate; unsigned8 ucModemCtrl; } mc68681_context; /* * Driver functions */ static boolean mc68681_probe(int minor); static int mc68681_set_attributes( int minor, const struct termios *t ); static void mc68681_init(int minor); static int mc68681_open( int major, int minor, void * arg ); static int mc68681_close( int major, int minor, void * arg ); static void mc68681_write_polled( int minor, char cChar ); static int mc68681_assert_RTS( int minor ); static int mc68681_negate_RTS( int minor ); static int mc68681_assert_DTR( int minor ); static int mc68681_negate_DTR( int minor ); static void mc68681_initialize_interrupts(int minor); static int mc68681_flush(int major, int minor, void *arg); static int mc68681_write_support_int( int minor, const char *buf, int len ); static int mc68681_write_support_polled( int minor, const char *buf, int len ); static int mc68681_inbyte_nonblocking_polled( int minor ); #ifdef __cplusplus } #endif #endif /* _MC68681_P_H_ */