[ac7d5ef0] | 1 | /* |
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| 2 | * This file contains the MVME162 console IO package. |
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| 3 | * |
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| 4 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 5 | * On-Line Applications Research Corporation (OAR). |
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| 6 | * All rights assigned to U.S. Government, 1994. |
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| 7 | * |
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| 8 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 9 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 10 | * notice must appear in all copies of this file and its derivatives. |
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| 11 | * |
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| 12 | * Modifications of respective RTEMS file: COPYRIGHT (c) 1994. |
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| 13 | * EISCAT Scientific Association. M.Savitski |
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| 14 | * |
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| 15 | * This material is a part of the MVME162 Board Support Package |
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| 16 | * for the RTEMS executive. Its licensing policies are those of the |
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| 17 | * RTEMS above. |
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| 18 | * |
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| 19 | * $Id$ |
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| 20 | */ |
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| 21 | |
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| 22 | #define M162_INIT |
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| 23 | |
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[3a4ae6c] | 24 | #include <bsp.h> |
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| 25 | #include <rtems/libio.h> |
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| 26 | #include <ringbuf.h> |
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[ac7d5ef0] | 27 | |
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[c6fb8e90] | 28 | Ring_buffer_t Buffer[2]; |
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| 29 | |
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| 30 | /* |
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| 31 | * Interrupt handler for receiver interrupts |
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[ac7d5ef0] | 32 | */ |
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| 33 | |
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[c6fb8e90] | 34 | rtems_isr C_Receive_ISR(rtems_vector_number vector) |
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| 35 | { |
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| 36 | register int ipend, port; |
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| 37 | |
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| 38 | ZWRITE0(1, 0x38); /* reset highest IUS */ |
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| 39 | |
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| 40 | ipend = ZREAD(1, 3); /* read int pending from A side */ |
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| 41 | |
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| 42 | if (ipend == 0x04) port = 0; /* channel B intr pending */ |
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| 43 | else if (ipend == 0x20) port = 1; /* channel A intr pending */ |
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| 44 | else return; |
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| 45 | |
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| 46 | Ring_buffer_Add_character(&Buffer[port], ZREADD(port)); |
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| 47 | |
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| 48 | if (ZREAD(port, 1) & 0x70) { /* check error stat */ |
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| 49 | ZWRITE0(port, 0x30); /* reset error */ |
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| 50 | } |
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| 51 | } |
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| 52 | |
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[ac7d5ef0] | 53 | rtems_device_driver console_initialize( |
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| 54 | rtems_device_major_number major, |
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| 55 | rtems_device_minor_number minor, |
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[3a4ae6c] | 56 | void *arg |
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[ac7d5ef0] | 57 | ) |
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| 58 | { |
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[c6fb8e90] | 59 | int i; |
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[3a4ae6c] | 60 | rtems_status_code status; |
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[c6fb8e90] | 61 | |
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| 62 | /* |
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| 63 | * Initialise receiver interrupts on both ports |
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| 64 | */ |
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| 65 | |
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| 66 | for (i = 0; i <= 1; i++) { |
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| 67 | Ring_buffer_Initialize( &Buffer[i] ); |
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| 68 | ZWRITE(i, 2, SCC_VECTOR); |
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| 69 | ZWRITE(i, 10, 0); |
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| 70 | ZWRITE(i, 1, 0x10); /* int on all Rx chars or special condition */ |
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| 71 | ZWRITE(i, 9, 8); /* master interrupt enable */ |
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| 72 | } |
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| 73 | |
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| 74 | set_vector(C_Receive_ISR, SCC_VECTOR, 1); /* install ISR for ports A and B */ |
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| 75 | |
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| 76 | mcchip->vector_base = 0; |
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| 77 | mcchip->gen_control = 2; /* MIEN */ |
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| 78 | mcchip->SCC_int_ctl = 0x13; /* SCC IEN, IPL3 */ |
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| 79 | |
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[3a4ae6c] | 80 | status = rtems_io_register_name( |
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| 81 | "/dev/console", |
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| 82 | major, |
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| 83 | (rtems_device_minor_number) 0 |
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| 84 | ); |
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| 85 | |
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| 86 | if (status != RTEMS_SUCCESSFUL) |
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| 87 | rtems_fatal_error_occurred(status); |
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| 88 | |
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| 89 | status = rtems_io_register_name( |
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| 90 | "/dev/tty00", |
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| 91 | major, |
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| 92 | (rtems_device_minor_number) 0 |
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| 93 | ); |
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| 94 | |
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| 95 | if (status != RTEMS_SUCCESSFUL) |
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| 96 | rtems_fatal_error_occurred(status); |
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| 97 | |
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| 98 | status = rtems_io_register_name( |
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| 99 | "/dev/tty01", |
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| 100 | major, |
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| 101 | (rtems_device_minor_number) 0 |
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| 102 | ); |
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| 103 | |
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| 104 | if (status != RTEMS_SUCCESSFUL) |
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| 105 | rtems_fatal_error_occurred(status); |
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| 106 | |
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| 107 | return RTEMS_SUCCESSFUL; |
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[ac7d5ef0] | 108 | } |
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| 109 | |
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[c6fb8e90] | 110 | /* |
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| 111 | * Non-blocking char input |
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[ac7d5ef0] | 112 | */ |
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| 113 | |
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[c6fb8e90] | 114 | rtems_boolean char_ready(int port, char *ch) |
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[ac7d5ef0] | 115 | { |
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[c6fb8e90] | 116 | if ( Ring_buffer_Is_empty( &Buffer[port] ) ) |
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| 117 | return FALSE; |
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[ac7d5ef0] | 118 | |
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[c6fb8e90] | 119 | Ring_buffer_Remove_character( &Buffer[port], *ch ); |
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| 120 | |
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| 121 | return TRUE; |
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[ac7d5ef0] | 122 | } |
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| 123 | |
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[c6fb8e90] | 124 | /* |
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| 125 | * Block on char input |
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[ac7d5ef0] | 126 | */ |
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| 127 | |
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[3a4ae6c] | 128 | char inbyte(int port) |
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[ac7d5ef0] | 129 | { |
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[c6fb8e90] | 130 | unsigned char tmp_char; |
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| 131 | |
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| 132 | while ( !char_ready(port, &tmp_char) ); |
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| 133 | return tmp_char; |
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[ac7d5ef0] | 134 | } |
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| 135 | |
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[c6fb8e90] | 136 | /* |
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| 137 | * This routine transmits a character out the SCC. It no longer supports |
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| 138 | * XON/XOFF flow control. |
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[ac7d5ef0] | 139 | */ |
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| 140 | |
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[3a4ae6c] | 141 | void outbyte(int port, char ch) |
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[ac7d5ef0] | 142 | { |
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[c6fb8e90] | 143 | while (1) { |
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| 144 | if (ZREAD0(port) & TX_BUFFER_EMPTY) break; |
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[ac7d5ef0] | 145 | } |
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[c6fb8e90] | 146 | ZWRITED(port, ch); |
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[ac7d5ef0] | 147 | } |
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| 148 | |
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| 149 | /* |
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[3a4ae6c] | 150 | * Open entry point |
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| 151 | */ |
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| 152 | |
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| 153 | rtems_device_driver console_open( |
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| 154 | rtems_device_major_number major, |
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| 155 | rtems_device_minor_number minor, |
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| 156 | void * arg |
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| 157 | ) |
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| 158 | { |
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| 159 | return RTEMS_SUCCESSFUL; |
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| 160 | } |
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| 161 | |
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| 162 | /* |
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| 163 | * Close entry point |
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| 164 | */ |
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| 165 | |
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| 166 | rtems_device_driver console_close( |
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| 167 | rtems_device_major_number major, |
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| 168 | rtems_device_minor_number minor, |
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| 169 | void * arg |
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| 170 | ) |
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| 171 | { |
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| 172 | return RTEMS_SUCCESSFUL; |
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| 173 | } |
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| 174 | |
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| 175 | /* |
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| 176 | * read bytes from the serial port. We only have stdin. |
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[ac7d5ef0] | 177 | */ |
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| 178 | |
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[3a4ae6c] | 179 | rtems_device_driver console_read( |
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| 180 | rtems_device_major_number major, |
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| 181 | rtems_device_minor_number minor, |
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| 182 | void * arg |
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| 183 | ) |
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[ac7d5ef0] | 184 | { |
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[3a4ae6c] | 185 | rtems_libio_rw_args_t *rw_args; |
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| 186 | char *buffer; |
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| 187 | int maximum; |
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| 188 | int count = 0; |
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| 189 | |
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| 190 | rw_args = (rtems_libio_rw_args_t *) arg; |
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[c6fb8e90] | 191 | |
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[3a4ae6c] | 192 | buffer = rw_args->buffer; |
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| 193 | maximum = rw_args->count; |
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[ac7d5ef0] | 194 | |
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[3a4ae6c] | 195 | if ( minor > 1 ) |
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| 196 | return RTEMS_INVALID_NUMBER; |
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| 197 | |
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| 198 | for (count = 0; count < maximum; count++) { |
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| 199 | buffer[ count ] = inbyte( minor ); |
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| 200 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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| 201 | buffer[ count++ ] = '\n'; |
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| 202 | buffer[ count ] = 0; |
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[ac7d5ef0] | 203 | break; |
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| 204 | } |
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| 205 | } |
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[3a4ae6c] | 206 | |
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| 207 | rw_args->bytes_moved = count; |
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| 208 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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[ac7d5ef0] | 209 | } |
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| 210 | |
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| 211 | /* |
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[3a4ae6c] | 212 | * write bytes to the serial port. Stdout and stderr are the same. |
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[ac7d5ef0] | 213 | */ |
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| 214 | |
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[3a4ae6c] | 215 | rtems_device_driver console_write( |
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| 216 | rtems_device_major_number major, |
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| 217 | rtems_device_minor_number minor, |
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| 218 | void * arg |
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| 219 | ) |
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[ac7d5ef0] | 220 | { |
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[3a4ae6c] | 221 | int count; |
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| 222 | int maximum; |
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| 223 | rtems_libio_rw_args_t *rw_args; |
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| 224 | char *buffer; |
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| 225 | |
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| 226 | rw_args = (rtems_libio_rw_args_t *) arg; |
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| 227 | |
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| 228 | buffer = rw_args->buffer; |
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| 229 | maximum = rw_args->count; |
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| 230 | |
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| 231 | if ( minor > 1 ) |
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| 232 | return RTEMS_INVALID_NUMBER; |
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| 233 | |
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| 234 | for (count = 0; count < maximum; count++) { |
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| 235 | if ( buffer[ count ] == '\n') { |
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| 236 | outbyte('\r', minor ); |
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[ac7d5ef0] | 237 | } |
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[3a4ae6c] | 238 | outbyte( buffer[ count ], minor ); |
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[ac7d5ef0] | 239 | } |
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[3a4ae6c] | 240 | return maximum; |
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| 241 | } |
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| 242 | |
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| 243 | /* |
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| 244 | * IO Control entry point |
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| 245 | */ |
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| 246 | |
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| 247 | rtems_device_driver console_control( |
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| 248 | rtems_device_major_number major, |
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| 249 | rtems_device_minor_number minor, |
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| 250 | void * arg |
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| 251 | ) |
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| 252 | { |
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| 253 | return RTEMS_SUCCESSFUL; |
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[ac7d5ef0] | 254 | } |
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