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/*

 *

 *  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.OARcorp.com/rtems/license.html.

 *

 *  $Id: mc68681_p.h,v 1.2 2001-09-27 12:01:42 chris Exp $

 */

#ifndef _MC68681_P_H_

#define _MC68681_P_H_

#ifdef __cplusplus

extern "C" {

#endif

/*

 *  Define MC68681_STATIC to nothing while debugging so the entry points

 *  will show up in the symbol table.

 */

#define MC68681_STATIC

/* #define MC68681_STATIC static */

/*

 * 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

#define MC68681_RX_ERRORS \

  (MC68681_OVERRUN_ERROR|MC68681_PARITY_ERROR| \

   MC68681_FRAMING_ERROR|MC68681_RECEIVED_BREAK)

/*

 * Interupt Status Register Definitions.

 *

 * MC68681_INTERRUPT_STATUS_REG

 */

/*

 *  Interupt Mask Register Definitions

 *

 *  MC68681_INTERRUPT_MASK_REG

 */

/* These are passed to mc68681_build_imr */

#define MC68681_IR_TX_READY                                 0x01

#define MC68681_IR_RX_READY                                 0x02

#define MC68681_IR_BREAK                                    0x04

#define MC68681_IMR_ENABLE_ALL                              0x07

#define MC68681_IMR_DISABLE_ALL                             0x00

#define MC68681_IMR_ENABLE_ALL_EXCEPT_TX                    0x06

#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;

  unsigned char  imr;

} mc68681_context;

/*

 * Driver functions

 */

MC68681_STATIC boolean mc68681_probe(int minor);

MC68681_STATIC int mc68681_set_attributes(

  int minor,

  const struct termios *t

);

MC68681_STATIC void mc68681_init(int minor);

MC68681_STATIC int mc68681_open(

  int major,

  int minor,

  void  * arg

);

MC68681_STATIC int mc68681_close(

  int major,

  int minor,

  void  * arg

);

MC68681_STATIC void mc68681_write_polled(

  int   minor,

  char  cChar

);

MC68681_STATIC void mc68681_initialize_interrupts(int minor);

MC68681_STATIC int mc68681_write_support_int(

  int   minor,

  const char *buf,

  int   len

);

MC68681_STATIC int mc68681_write_support_polled(

  int   minor,

  const char *buf,

  int   len

  );

MC68681_STATIC int mc68681_inbyte_nonblocking_polled(

  int minor

);

MC68681_STATIC unsigned int mc68681_build_imr(

  int  minor,

  int  enable_flag

);

MC68681_STATIC void mc68681_process(

  int  minor

);

MC68681_STATIC void mc68681_enable_interrupts(

  int minor,

  int imr_mask

);

#ifdef __cplusplus

}

#endif

#endif /* _MC68681_P_H_ */