[c8471315] | 1 | /* |
---|
| 2 | * This file contains the hardware specific portions of the TTY driver |
---|
| 3 | * for the serial ports on the jmr3904. |
---|
| 4 | * |
---|
| 5 | * Logic based on the jmr3904-io.c file in newlib 1.8.2 |
---|
| 6 | * |
---|
| 7 | * COPYRIGHT (c) 1989-2000. |
---|
| 8 | * On-Line Applications Research Corporation (OAR). |
---|
| 9 | * |
---|
| 10 | * The license and distribution terms for this file may be |
---|
| 11 | * found in the file LICENSE in this distribution or at |
---|
| 12 | * http://www.OARcorp.com/rtems/license.html. |
---|
| 13 | * |
---|
| 14 | * $Id$ |
---|
| 15 | */ |
---|
| 16 | |
---|
| 17 | #include <bsp.h> |
---|
| 18 | #include <rtems/libio.h> |
---|
| 19 | #include <stdlib.h> |
---|
| 20 | #include <assert.h> |
---|
| 21 | |
---|
| 22 | /* external prototypes for monitor interface routines */ |
---|
| 23 | |
---|
| 24 | void outbyte( char ); |
---|
| 25 | char inbyte( void ); |
---|
| 26 | |
---|
| 27 | #define READ_UINT8( _register_, _value_ ) \ |
---|
| 28 | ((_value_) = *((volatile unsigned char *)(_register_))) |
---|
| 29 | |
---|
| 30 | #define WRITE_UINT8( _register_, _value_ ) \ |
---|
| 31 | (*((volatile unsigned char *)(_register_)) = (_value_)) |
---|
| 32 | |
---|
| 33 | #define READ_UINT16( _register_, _value_ ) \ |
---|
| 34 | ((_value_) = *((volatile unsigned short *)(_register_))) |
---|
| 35 | |
---|
| 36 | #define WRITE_UINT16( _register_, _value_ ) \ |
---|
| 37 | (*((volatile unsigned short *)(_register_)) = (_value_)) |
---|
| 38 | |
---|
| 39 | |
---|
| 40 | /* - Board specific addresses for serial chip */ |
---|
| 41 | #define DIAG_BASE 0xfffff300 |
---|
| 42 | #define DIAG_SLCR (DIAG_BASE+0x00) |
---|
| 43 | #define DIAG_SLSR (DIAG_BASE+0x04) |
---|
| 44 | #define DIAG_SLDICR (DIAG_BASE+0x08) |
---|
| 45 | #define DIAG_SLDISR (DIAG_BASE+0x0C) |
---|
| 46 | #define DIAG_SFCR (DIAG_BASE+0x10) |
---|
| 47 | #define DIAG_SBRG (DIAG_BASE+0x14) |
---|
| 48 | #define DIAG_TFIFO (DIAG_BASE+0x20) |
---|
| 49 | #define DIAG_RFIFO (DIAG_BASE+0x30) |
---|
| 50 | |
---|
| 51 | #define BRG_T0 0x0000 |
---|
| 52 | #define BRG_T2 0x0100 |
---|
| 53 | #define BRG_T4 0x0200 |
---|
| 54 | #define BRG_T5 0x0300 |
---|
| 55 | |
---|
| 56 | /* |
---|
| 57 | * Eventually console-polled.c should hook to this better. |
---|
| 58 | */ |
---|
| 59 | |
---|
| 60 | static char initialized = 0; |
---|
| 61 | |
---|
| 62 | void board_serial_init (void) |
---|
| 63 | { |
---|
| 64 | initialized = 1; |
---|
| 65 | WRITE_UINT16 (DIAG_SLCR, 0x0020); |
---|
| 66 | WRITE_UINT16 (DIAG_SLDICR, 0x0000); |
---|
| 67 | WRITE_UINT16 (DIAG_SFCR, 0x0000); |
---|
| 68 | WRITE_UINT16 (DIAG_SBRG, BRG_T2 | 5); |
---|
| 69 | } |
---|
| 70 | |
---|
| 71 | /* |
---|
| 72 | * console_outbyte_polled |
---|
| 73 | * |
---|
| 74 | * This routine transmits a character using polling. |
---|
| 75 | */ |
---|
| 76 | |
---|
| 77 | void console_outbyte_polled( |
---|
| 78 | int port, |
---|
| 79 | char ch |
---|
| 80 | ) |
---|
| 81 | { |
---|
| 82 | unsigned short disr; |
---|
| 83 | |
---|
| 84 | if ( !initialized ) |
---|
| 85 | board_serial_init(); |
---|
| 86 | |
---|
| 87 | for (;;) |
---|
| 88 | { |
---|
| 89 | READ_UINT16 (DIAG_SLDISR, disr); |
---|
| 90 | if (disr & 0x0002) |
---|
| 91 | break; |
---|
| 92 | } |
---|
| 93 | disr = disr & ~0x0002; |
---|
| 94 | WRITE_UINT8 (DIAG_TFIFO, (unsigned char) ch); |
---|
| 95 | WRITE_UINT16 (DIAG_SLDISR, disr); |
---|
| 96 | } |
---|
| 97 | |
---|
| 98 | /* |
---|
| 99 | * console_inbyte_nonblocking |
---|
| 100 | * |
---|
| 101 | * This routine polls for a character. |
---|
| 102 | */ |
---|
| 103 | |
---|
| 104 | int console_inbyte_nonblocking( |
---|
| 105 | int port |
---|
| 106 | ) |
---|
| 107 | { |
---|
| 108 | unsigned char c; |
---|
| 109 | unsigned short disr; |
---|
| 110 | |
---|
| 111 | if ( !initialized ) |
---|
| 112 | board_serial_init(); |
---|
| 113 | |
---|
| 114 | READ_UINT16 (DIAG_SLDISR, disr); |
---|
| 115 | if (disr & 0x0001) { |
---|
| 116 | disr = disr & ~0x0001; |
---|
| 117 | READ_UINT8 (DIAG_RFIFO, c); |
---|
| 118 | WRITE_UINT16 (DIAG_SLDISR, disr); |
---|
| 119 | return (char) c; |
---|
| 120 | } |
---|
| 121 | return -1; |
---|
| 122 | } |
---|
| 123 | |
---|
[c1a24fbe] | 124 | #include <bspIo.h> |
---|
| 125 | |
---|
| 126 | void JMR3904_output_char(char c) { console_outbyte_polled( 0, c ); } |
---|
| 127 | |
---|
| 128 | BSP_output_char_function_type BSP_output_char = JMR3904_output_char; |
---|
| 129 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
---|
| 130 | |
---|