[9c448e1] | 1 | /* |
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| 2 | * This file contains the TTY driver for the serial ports on the SCORE603e. |
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| 3 | * |
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| 4 | * This driver uses the termios pseudo driver. |
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| 5 | * |
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| 6 | * Currently only polled mode is supported. |
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| 7 | * |
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| 8 | * COPYRIGHT (c) 1989-1997. |
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| 9 | * On-Line Applications Research Corporation (OAR). |
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| 10 | * Copyright assigned to U.S. Government, 1994. |
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| 11 | * |
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| 12 | * The license and distribution terms for this file may be |
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| 13 | * found in the file LICENSE in this distribution or at |
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| 14 | * http://www.OARcorp.com/rtems/license.html. |
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| 15 | * |
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| 16 | * $Id$ |
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| 17 | */ |
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| 18 | |
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| 19 | #include <bsp.h> |
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| 20 | #include <rtems/libio.h> |
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| 21 | #include <stdlib.h> |
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| 22 | #include <assert.h> |
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| 23 | |
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| 24 | #include "consolebsp.h" |
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| 25 | |
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| 26 | #if (1) |
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| 27 | /* |
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| 28 | * The Port Used for the Console interface is based upon which |
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| 29 | * debugger is being used. The SDS debugger uses a binary |
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| 30 | * interface on port 0 as part of the debugger. Thus port 0 can |
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| 31 | * not be used as the console port for the SDS debugger. |
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| 32 | */ |
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| 33 | |
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| 34 | #if (SCORE603E_USE_SDS) |
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| 35 | #define USE_FOR_CONSOLE_DEF 1 |
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| 36 | |
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| 37 | #elif (SCORE603E_USE_OPEN_FIRMWARE) |
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| 38 | #define USE_FOR_CONSOLE_DEF 0 |
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| 39 | |
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| 40 | #elif (SCORE603E_USE_NONE) |
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| 41 | #define USE_FOR_CONSOLE_DEF 0 |
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| 42 | |
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| 43 | #elif (SCORE603E_USE_DINK) |
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| 44 | #define USE_FOR_CONSOLE_DEF 0 |
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| 45 | |
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| 46 | #else |
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| 47 | #error "SCORE603E CONSOLE.C -- what ROM monitor are you using" |
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| 48 | #endif |
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| 49 | |
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| 50 | #endif |
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| 51 | |
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| 52 | #if (0) |
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| 53 | extern int USE_FOR_CONSOLE; |
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| 54 | #endif |
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| 55 | |
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| 56 | int USE_FOR_CONSOLE = USE_FOR_CONSOLE_DEF; |
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| 57 | |
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| 58 | /* |
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| 59 | * |
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| 60 | * Console Device Driver Entry Points |
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| 61 | */ |
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| 62 | |
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| 63 | /* PAGE |
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| 64 | * |
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| 65 | * DEBUG_puts |
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| 66 | * |
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| 67 | * This should be safe in the event of an error. It attempts to insure |
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| 68 | * that no TX empty interrupts occur while it is doing polled IO. Then |
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| 69 | * it restores the state of that external interrupt. |
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| 70 | * |
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| 71 | * Input parameters: |
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| 72 | * string - pointer to debug output string |
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| 73 | * |
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| 74 | * Output parameters: NONE |
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| 75 | * |
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| 76 | * Return values: NONE |
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| 77 | */ |
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| 78 | |
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| 79 | void DEBUG_puts( |
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| 80 | char *string |
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| 81 | ) |
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| 82 | { |
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| 83 | char *s; |
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| 84 | int console; |
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| 85 | volatile rtems_unsigned8 *csr; |
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| 86 | |
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| 87 | console = USE_FOR_CONSOLE; |
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| 88 | |
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| 89 | csr = Ports_85C30[ console ].ctrl; |
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| 90 | |
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| 91 | /* should disable interrupts here */ |
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| 92 | |
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| 93 | for ( s = string ; *s ; s++ ) |
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| 94 | outbyte_polled_85c30( csr, *s ); |
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| 95 | |
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| 96 | outbyte_polled_85c30( csr, '\r' ); |
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| 97 | outbyte_polled_85c30( csr, '\n' ); |
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| 98 | |
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| 99 | /* should enable interrupts here */ |
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| 100 | } |
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| 101 | |
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| 102 | /* PAGE |
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| 103 | * |
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| 104 | * console_inbyte_nonblocking |
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| 105 | * |
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| 106 | * Console Termios polling input entry point. |
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| 107 | */ |
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| 108 | |
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| 109 | int console_inbyte_nonblocking( |
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| 110 | int minor |
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| 111 | ) |
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| 112 | { |
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| 113 | int port = minor; |
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| 114 | |
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| 115 | /* |
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| 116 | * verify port Number |
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| 117 | */ |
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| 118 | assert ( port < NUM_Z85C30_PORTS ); |
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| 119 | |
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| 120 | /* |
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| 121 | * return a character from the 85c30 port. |
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| 122 | */ |
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| 123 | return inbyte_nonblocking_85c30( &Ports_85C30[ port ] ); |
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| 124 | } |
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| 125 | |
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| 126 | rtems_device_driver console_close( |
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| 127 | rtems_device_major_number major, |
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| 128 | rtems_device_minor_number minor, |
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| 129 | void * arg |
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| 130 | ) |
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| 131 | { |
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| 132 | return rtems_termios_close (arg); |
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| 133 | } |
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| 134 | |
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| 135 | rtems_device_driver console_read( |
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| 136 | rtems_device_major_number major, |
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| 137 | rtems_device_minor_number minor, |
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| 138 | void * arg |
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| 139 | ) |
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| 140 | { |
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| 141 | return rtems_termios_read (arg); |
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| 142 | } |
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| 143 | |
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| 144 | rtems_device_driver console_write( |
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| 145 | rtems_device_major_number major, |
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| 146 | rtems_device_minor_number minor, |
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| 147 | void * arg |
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| 148 | ) |
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| 149 | { |
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| 150 | return rtems_termios_write (arg); |
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| 151 | } |
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| 152 | |
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| 153 | rtems_device_driver console_control( |
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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_termios_ioctl (arg); |
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| 160 | } |
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| 161 | |
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| 162 | |
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| 163 | |
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| 164 | /* |
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| 165 | * Interrupt driven console IO |
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| 166 | */ |
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| 167 | |
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| 168 | #if CONSOLE_USE_INTERRUPTS |
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| 169 | |
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| 170 | rtems_isr console_isr( |
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| 171 | rtems_vector_number vector |
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| 172 | ) |
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| 173 | { |
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| 174 | int i; |
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| 175 | |
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| 176 | for (i=0; i < NUM_Z85C30_PORTS; i++){ |
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| 177 | ISR_85c30_Async( &Ports_85C30[i] ); |
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| 178 | |
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| 179 | #if (0) /* XXX - TO TEST LOOP BACKS comment this out. */ |
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| 180 | if ( Ports_85C30[i].Chip->vector == vector ) { |
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| 181 | ISR_85c30_Async( &Ports_85C30[i] ); |
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| 182 | } |
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| 183 | #endif |
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| 184 | } |
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| 185 | } |
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| 186 | |
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| 187 | void console_exit() |
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| 188 | { |
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| 189 | int i; |
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| 190 | volatile Ring_buffer_t *buffer; |
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| 191 | rtems_unsigned32 ch; |
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| 192 | |
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| 193 | for ( i=0 ; i < NUM_Z85C30_PORTS ; i++ ) { |
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| 194 | |
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| 195 | buffer = &( Ports_85C30[i].Protocol->TX_Buffer); |
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| 196 | |
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| 197 | while ( !Ring_buffer_Is_empty( buffer ) ) { |
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| 198 | Ring_buffer_Remove_character( buffer, ch ); |
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| 199 | outbyte_polled_85c30( Ports_85C30[i].ctrl, ch ); |
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| 200 | } |
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| 201 | } |
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| 202 | } |
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| 203 | |
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| 204 | void console_initialize_interrupts( void ) |
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| 205 | { |
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| 206 | volatile Ring_buffer_t *buffer; |
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| 207 | Console_Protocol *protocol; |
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| 208 | int i; |
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| 209 | |
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| 210 | for ( i=0 ; i < NUM_Z85C30_PORTS ; i++ ) { |
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| 211 | protocol = Ports_85C30[i].Protocol; |
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| 212 | |
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| 213 | /* |
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| 214 | * Initialize the ring buffer and set to not transmitting. |
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| 215 | */ |
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| 216 | buffer = &protocol->TX_Buffer; |
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| 217 | Ring_buffer_Initialize( buffer ); |
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| 218 | protocol->Is_TX_active = FALSE; |
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| 219 | } |
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| 220 | |
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| 221 | /* |
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| 222 | * Connect each vector to the interupt service routine. |
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| 223 | */ |
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| 224 | for (i=0; i < NUM_Z85C30_CHIPS; i++) |
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| 225 | set_vector( console_isr, Chips_85C30[i].vector, 1 ); |
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| 226 | |
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| 227 | |
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| 228 | atexit( console_exit ); |
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| 229 | |
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| 230 | } |
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| 231 | void console_outbyte_interrupts( |
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| 232 | const Port_85C30_info *Port, |
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| 233 | char ch |
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| 234 | ); |
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| 235 | |
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| 236 | /* XXXXXX */ |
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| 237 | #endif |
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| 238 | |
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| 239 | |
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| 240 | /* PAGE |
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| 241 | * |
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| 242 | * console_initialize |
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| 243 | * |
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| 244 | * Routine called to initialize the console device driver. |
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| 245 | */ |
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| 246 | rtems_device_driver console_initialize( |
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| 247 | rtems_device_major_number major, |
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| 248 | rtems_device_minor_number minor, |
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| 249 | void *arg |
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| 250 | ) |
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| 251 | { |
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| 252 | rtems_status_code status; |
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| 253 | rtems_device_minor_number console; |
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| 254 | int port, chip, p0,p1; |
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| 255 | |
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| 256 | /* |
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| 257 | * initialize the termio interface. |
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| 258 | */ |
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| 259 | rtems_termios_initialize(); |
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| 260 | |
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| 261 | /* |
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| 262 | * Register Device Names |
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| 263 | */ |
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| 264 | console = USE_FOR_CONSOLE; |
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| 265 | status = rtems_io_register_name( "/dev/console", major, console ); |
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| 266 | if (status != RTEMS_SUCCESSFUL) |
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| 267 | rtems_fatal_error_occurred(status); |
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| 268 | |
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| 269 | /* |
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| 270 | * Initialize Hardware |
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| 271 | */ |
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| 272 | |
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| 273 | |
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| 274 | /* |
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| 275 | * INITIALIZE_COM_PORTS is defined in the linker script. If it is |
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| 276 | * true all serial chips on the board are to be reset at startup |
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| 277 | * otherwise the reset is assumed to occur elsewhere (ie. in the |
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| 278 | * debugger...) |
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| 279 | */ |
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| 280 | #if ( INITIALIZE_COM_PORTS ) |
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| 281 | |
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| 282 | /* |
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| 283 | * Force to perform a hardware reset w/o |
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| 284 | * Master interrupt enable via register 9 |
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| 285 | */ |
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| 286 | |
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| 287 | for (port=0; port<NUM_Z85C30_PORTS; port++){ |
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| 288 | p0 = port; |
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| 289 | port++; |
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| 290 | p1 = port; |
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| 291 | Reset_85c30_chip( Ports_85C30[p0].ctrl, Ports_85C30[p1].ctrl ); |
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| 292 | } |
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| 293 | #else |
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| 294 | /* TEMP - To see if this makes a diff with the new ports. |
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| 295 | * Never reset chip 1 when using the chip as a monitor |
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| 296 | */ |
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| 297 | for (port=2; port<NUM_Z85C30_PORTS; port++){ |
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| 298 | p0 = port; |
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| 299 | port++; |
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| 300 | p1 = port; |
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| 301 | Reset_85c30_chip( Ports_85C30[p0].ctrl, Ports_85C30[p1].ctrl ); |
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| 302 | } |
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| 303 | #endif |
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| 304 | |
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| 305 | /* |
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| 306 | * Initialize each port. |
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| 307 | * Note: the ports are numbered such that 0,1 are on the first chip |
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| 308 | * 2,3 are on the second .... |
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| 309 | */ |
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| 310 | |
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| 311 | for (port=0; port<NUM_Z85C30_PORTS; port++) { |
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| 312 | chip = port >> 1; |
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| 313 | initialize_85c30_port( &Ports_85C30[port] ); |
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| 314 | } |
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| 315 | |
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| 316 | #if CONSOLE_USE_INTERRUPTS |
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| 317 | console_initialize_interrupts(); |
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| 318 | #endif |
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| 319 | |
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| 320 | return RTEMS_SUCCESSFUL; |
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| 321 | } |
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| 322 | |
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| 323 | /* PAGE |
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| 324 | * |
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| 325 | * console_write_support |
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| 326 | * |
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| 327 | * Console Termios output entry point. |
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| 328 | * |
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| 329 | */ |
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| 330 | int console_write_support( |
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| 331 | int minor, |
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| 332 | const char *buf, |
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| 333 | int len) |
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| 334 | { |
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| 335 | int nwrite = 0; |
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| 336 | volatile rtems_unsigned8 *csr; |
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| 337 | int port = minor; |
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| 338 | |
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| 339 | /* |
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| 340 | * verify port Number |
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| 341 | */ |
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| 342 | assert ( port < NUM_Z85C30_PORTS ); |
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| 343 | |
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| 344 | /* |
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| 345 | * Set the csr based upon the port number. |
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| 346 | */ |
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| 347 | csr = Ports_85C30[ port ].ctrl; |
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| 348 | |
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| 349 | /* |
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| 350 | * poll each byte in the string out of the port. |
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| 351 | */ |
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| 352 | while (nwrite < len) { |
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| 353 | #if (CONSOLE_USE_INTERRUPTS) |
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| 354 | console_outbyte_interrupts( &Ports_85C30[ port ], *buf++ ); |
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| 355 | #else |
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| 356 | outbyte_polled_85c30( csr, *buf++ ); |
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| 357 | #endif |
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| 358 | nwrite++; |
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| 359 | } |
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| 360 | |
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| 361 | /* |
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| 362 | * return the number of bytes written. |
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| 363 | */ |
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| 364 | return nwrite; |
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| 365 | } |
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| 366 | |
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| 367 | /* PAGE |
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| 368 | * |
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| 369 | * console_open |
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| 370 | * |
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| 371 | * open a port as a termios console. |
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| 372 | * |
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| 373 | */ |
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| 374 | rtems_device_driver console_open( |
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| 375 | rtems_device_major_number major, |
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| 376 | rtems_device_minor_number minor, |
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| 377 | void * arg |
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| 378 | ) |
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| 379 | { |
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| 380 | rtems_status_code sc; |
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| 381 | int port = minor; |
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| 382 | #if (CONSOLE_USE_INTERRUPTS) |
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| 383 | rtems_libio_open_close_args_t *args = arg; |
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| 384 | static const rtems_termios_callbacks intrCallbacks = { |
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| 385 | NULL, /* firstOpen */ |
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| 386 | NULL, /* lastClose */ |
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| 387 | NULL, /* pollRead */ |
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| 388 | console_write_support, /* write */ |
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| 389 | NULL, /* setAttributes */ |
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| 390 | NULL, /* stopRemoteTx */ |
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| 391 | NULL, /* startRemoteTx */ |
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| 392 | 1 /* outputUsesInterrupts */ |
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| 393 | }; |
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| 394 | #else |
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| 395 | static const rtems_termios_callbacks pollCallbacks = { |
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| 396 | NULL, /* firstOpen */ |
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| 397 | NULL, /* lastClose */ |
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| 398 | console_inbyte_nonblocking, /* pollRead */ |
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| 399 | console_write_support, /* write */ |
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| 400 | NULL, /* setAttributes */ |
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| 401 | NULL, /* stopRemoteTx */ |
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| 402 | NULL, /* startRemoteTx */ |
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| 403 | 0 /* outputUsesInterrupts */ |
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| 404 | }; |
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| 405 | #endif |
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| 406 | |
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| 407 | |
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| 408 | /* |
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| 409 | * Verify the minor number is valid. |
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| 410 | */ |
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| 411 | if (minor < 0) |
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| 412 | return RTEMS_INVALID_NUMBER; |
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| 413 | |
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| 414 | if ( port > NUM_Z85C30_PORTS ) |
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| 415 | return RTEMS_INVALID_NUMBER; |
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| 416 | |
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| 417 | /* |
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| 418 | * open the port as a termios console driver. |
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| 419 | */ |
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| 420 | |
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| 421 | #if (CONSOLE_USE_INTERRUPTS) |
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| 422 | sc = rtems_termios_open( major, minor, arg, &intrCallbacks ); |
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| 423 | |
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| 424 | Ports_85C30[ minor ].Protocol->console_termios_data = args->iop->data1; |
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| 425 | #else |
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| 426 | sc = rtems_termios_open( major, minor, arg, &pollCallbacks ); |
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| 427 | #endif |
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| 428 | |
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| 429 | return sc; |
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| 430 | } |
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| 431 | |
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| 432 | |
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| 433 | #if (CONSOLE_USE_INTERRUPTS) |
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| 434 | |
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| 435 | /* |
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| 436 | * console_outbyte_interrupts |
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| 437 | * |
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| 438 | * This routine transmits a character out. |
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| 439 | * |
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| 440 | * Input parameters: |
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| 441 | * port - port to transmit character to |
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| 442 | * ch - character to be transmitted |
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| 443 | * |
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| 444 | * Output parameters: NONE |
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| 445 | * |
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| 446 | * Return values: NONE |
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| 447 | */ |
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| 448 | void console_outbyte_interrupts( |
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| 449 | const Port_85C30_info *Port, |
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| 450 | char ch |
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| 451 | ) |
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| 452 | { |
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| 453 | Console_Protocol *protocol; |
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| 454 | rtems_unsigned32 isrlevel; |
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| 455 | |
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| 456 | protocol = Port->Protocol; |
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| 457 | |
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| 458 | /* |
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| 459 | * If this is the first character then we need to prime the pump |
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| 460 | */ |
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| 461 | |
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| 462 | if ( protocol->Is_TX_active == FALSE ) { |
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| 463 | |
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| 464 | rtems_interrupt_disable( isrlevel ); |
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| 465 | protocol->Is_TX_active = TRUE; |
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| 466 | outbyte_polled_85c30( Port->ctrl, ch ); |
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| 467 | rtems_interrupt_enable( isrlevel ); |
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| 468 | |
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| 469 | return; |
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| 470 | } |
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| 471 | |
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| 472 | while ( Ring_buffer_Is_full( &protocol->TX_Buffer ) ); |
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| 473 | |
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| 474 | Ring_buffer_Add_character( &protocol->TX_Buffer, ch ); |
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| 475 | } |
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| 476 | |
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| 477 | #endif |
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| 478 | |
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| 479 | |
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| 480 | |
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| 481 | |
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| 482 | |
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| 483 | |
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| 484 | |
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| 485 | |
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| 486 | |
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| 487 | |
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| 488 | |
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