[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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[31a5ec8] | 8 | * COPYRIGHT (c) 1989-2009. |
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[9c448e1] | 9 | * On-Line Applications Research Corporation (OAR). |
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| 10 | * |
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| 11 | * The license and distribution terms for this file may be |
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| 12 | * found in the file LICENSE in this distribution or at |
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[b14e2f2] | 13 | * http://www.rtems.com/license/LICENSE. |
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[9c448e1] | 14 | * |
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| 15 | * $Id$ |
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| 16 | */ |
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| 17 | |
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| 18 | #include <bsp.h> |
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| 19 | #include <rtems/libio.h> |
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| 20 | #include <stdlib.h> |
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| 21 | #include <assert.h> |
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| 22 | |
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| 23 | #include "consolebsp.h" |
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[bb41881e] | 24 | #include <rtems/bspIo.h> |
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[9c448e1] | 25 | |
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| 26 | /* |
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[6128a4a] | 27 | * The Port Used for the Console interface is based upon which |
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| 28 | * debugger is being used. The SDS debugger uses a binary |
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[9c448e1] | 29 | * interface on port 0 as part of the debugger. Thus port 0 can |
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| 30 | * not be used as the console port for the SDS debugger. |
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| 31 | */ |
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| 32 | |
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| 33 | #define USE_FOR_CONSOLE_DEF 0 |
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| 34 | int USE_FOR_CONSOLE = USE_FOR_CONSOLE_DEF; |
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| 35 | |
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| 36 | /* |
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| 37 | * |
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| 38 | * Console Device Driver Entry Points |
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| 39 | */ |
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[6128a4a] | 40 | |
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[9c448e1] | 41 | /* PAGE |
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| 42 | * |
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[6128a4a] | 43 | * console_inbyte_nonblocking |
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[9c448e1] | 44 | * |
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| 45 | * Console Termios polling input entry point. |
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| 46 | */ |
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| 47 | |
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[6128a4a] | 48 | int console_inbyte_nonblocking( |
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| 49 | int minor |
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[9c448e1] | 50 | ) |
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| 51 | { |
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| 52 | int port = minor; |
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| 53 | |
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[6128a4a] | 54 | /* |
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| 55 | * verify port Number |
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[9c448e1] | 56 | */ |
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| 57 | assert ( port < NUM_Z85C30_PORTS ); |
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[6128a4a] | 58 | |
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[9c448e1] | 59 | /* |
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| 60 | * return a character from the 85c30 port. |
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| 61 | */ |
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| 62 | return inbyte_nonblocking_85c30( &Ports_85C30[ port ] ); |
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| 63 | } |
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[6128a4a] | 64 | |
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[9c448e1] | 65 | rtems_device_driver console_close( |
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| 66 | rtems_device_major_number major, |
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| 67 | rtems_device_minor_number minor, |
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| 68 | void * arg |
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| 69 | ) |
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| 70 | { |
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| 71 | return rtems_termios_close (arg); |
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| 72 | } |
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[6128a4a] | 73 | |
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[9c448e1] | 74 | rtems_device_driver console_read( |
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| 75 | rtems_device_major_number major, |
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| 76 | rtems_device_minor_number minor, |
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| 77 | void * arg |
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| 78 | ) |
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| 79 | { |
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| 80 | return rtems_termios_read (arg); |
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| 81 | } |
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[6128a4a] | 82 | |
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[9c448e1] | 83 | rtems_device_driver console_write( |
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| 84 | rtems_device_major_number major, |
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| 85 | rtems_device_minor_number minor, |
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| 86 | void * arg |
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| 87 | ) |
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| 88 | { |
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| 89 | return rtems_termios_write (arg); |
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| 90 | } |
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[6128a4a] | 91 | |
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[9c448e1] | 92 | rtems_device_driver console_control( |
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| 93 | rtems_device_major_number major, |
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| 94 | rtems_device_minor_number minor, |
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| 95 | void * arg |
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| 96 | ) |
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| 97 | { |
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| 98 | return rtems_termios_ioctl (arg); |
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| 99 | } |
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| 100 | |
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| 101 | /* |
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| 102 | * Interrupt driven console IO |
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| 103 | */ |
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| 104 | |
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| 105 | #if CONSOLE_USE_INTERRUPTS |
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| 106 | |
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| 107 | rtems_isr console_isr( |
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| 108 | rtems_vector_number vector |
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| 109 | ) |
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| 110 | { |
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| 111 | int i; |
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[6128a4a] | 112 | |
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[9c448e1] | 113 | for (i=0; i < NUM_Z85C30_PORTS; i++){ |
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| 114 | ISR_85c30_Async( &Ports_85C30[i] ); |
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[6128a4a] | 115 | } |
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[9c448e1] | 116 | } |
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| 117 | |
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| 118 | void console_exit() |
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| 119 | { |
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| 120 | int i; |
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| 121 | volatile Ring_buffer_t *buffer; |
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[dac4208] | 122 | uint32_t ch; |
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[9c448e1] | 123 | |
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| 124 | for ( i=0 ; i < NUM_Z85C30_PORTS ; i++ ) { |
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[6128a4a] | 125 | |
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[9c448e1] | 126 | buffer = &( Ports_85C30[i].Protocol->TX_Buffer); |
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| 127 | |
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| 128 | while ( !Ring_buffer_Is_empty( buffer ) ) { |
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| 129 | Ring_buffer_Remove_character( buffer, ch ); |
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[6128a4a] | 130 | outbyte_polled_85c30( Ports_85C30[i].ctrl, ch ); |
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[9c448e1] | 131 | } |
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| 132 | } |
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| 133 | } |
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| 134 | |
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| 135 | void console_initialize_interrupts( void ) |
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| 136 | { |
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| 137 | volatile Ring_buffer_t *buffer; |
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| 138 | Console_Protocol *protocol; |
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| 139 | int i; |
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[6128a4a] | 140 | |
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[9c448e1] | 141 | for ( i=0 ; i < NUM_Z85C30_PORTS ; i++ ) { |
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| 142 | protocol = Ports_85C30[i].Protocol; |
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| 143 | |
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| 144 | /* |
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| 145 | * Initialize the ring buffer and set to not transmitting. |
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| 146 | */ |
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| 147 | buffer = &protocol->TX_Buffer; |
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| 148 | Ring_buffer_Initialize( buffer ); |
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[3551166d] | 149 | protocol->Is_TX_active = false; |
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[9c448e1] | 150 | } |
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| 151 | |
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[6128a4a] | 152 | /* |
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[9c448e1] | 153 | * Connect each vector to the interupt service routine. |
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| 154 | */ |
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| 155 | for (i=0; i < NUM_Z85C30_CHIPS; i++) |
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| 156 | set_vector( console_isr, Chips_85C30[i].vector, 1 ); |
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[6128a4a] | 157 | |
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[9c448e1] | 158 | atexit( console_exit ); |
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[6128a4a] | 159 | |
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[9c448e1] | 160 | } |
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| 161 | void console_outbyte_interrupts( |
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| 162 | const Port_85C30_info *Port, |
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| 163 | char ch |
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| 164 | ); |
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| 165 | |
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| 166 | #endif |
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| 167 | |
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| 168 | /* PAGE |
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| 169 | * |
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| 170 | * console_initialize |
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| 171 | * |
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| 172 | * Routine called to initialize the console device driver. |
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| 173 | */ |
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| 174 | rtems_device_driver console_initialize( |
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| 175 | rtems_device_major_number major, |
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| 176 | rtems_device_minor_number minor, |
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| 177 | void *arg |
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| 178 | ) |
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| 179 | { |
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| 180 | rtems_status_code status; |
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| 181 | rtems_device_minor_number console; |
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| 182 | int port, chip, p0,p1; |
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| 183 | |
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| 184 | /* |
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| 185 | * initialize the termio interface. |
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| 186 | */ |
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| 187 | rtems_termios_initialize(); |
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| 188 | |
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| 189 | /* |
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| 190 | * Register Device Names |
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| 191 | */ |
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| 192 | console = USE_FOR_CONSOLE; |
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| 193 | status = rtems_io_register_name( "/dev/console", major, console ); |
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| 194 | if (status != RTEMS_SUCCESSFUL) |
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| 195 | rtems_fatal_error_occurred(status); |
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| 196 | |
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| 197 | /* |
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| 198 | * Initialize Hardware |
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| 199 | */ |
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| 200 | |
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| 201 | /* |
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| 202 | * INITIALIZE_COM_PORTS is defined in the linker script. If it is |
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| 203 | * true all serial chips on the board are to be reset at startup |
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| 204 | * otherwise the reset is assumed to occur elsewhere (ie. in the |
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| 205 | * debugger...) |
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| 206 | */ |
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| 207 | #if ( INITIALIZE_COM_PORTS ) |
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| 208 | /* |
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| 209 | * Force to perform a hardware reset w/o |
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| 210 | * Master interrupt enable via register 9 |
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| 211 | */ |
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[6128a4a] | 212 | |
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[9c448e1] | 213 | for (port=0; port<NUM_Z85C30_PORTS; port++){ |
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| 214 | p0 = port; |
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| 215 | port++; |
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| 216 | p1 = port; |
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| 217 | Reset_85c30_chip( Ports_85C30[p0].ctrl, Ports_85C30[p1].ctrl ); |
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| 218 | } |
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| 219 | #else |
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[6128a4a] | 220 | /* TEMP - To see if this makes a diff with the new ports. |
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[9c448e1] | 221 | * Never reset chip 1 when using the chip as a monitor |
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| 222 | */ |
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| 223 | for (port=2; port<NUM_Z85C30_PORTS; port++){ |
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| 224 | p0 = port; |
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| 225 | port++; |
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| 226 | p1 = port; |
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| 227 | Reset_85c30_chip( Ports_85C30[p0].ctrl, Ports_85C30[p1].ctrl ); |
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| 228 | } |
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| 229 | #endif |
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| 230 | |
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[6128a4a] | 231 | /* |
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[9c448e1] | 232 | * Initialize each port. |
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| 233 | * Note: the ports are numbered such that 0,1 are on the first chip |
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| 234 | * 2,3 are on the second .... |
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| 235 | */ |
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| 236 | |
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[40e7ae2] | 237 | for (port=1; port<NUM_Z85C30_PORTS; port++) { |
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| 238 | chip = port >> 1; |
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[9c448e1] | 239 | initialize_85c30_port( &Ports_85C30[port] ); |
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| 240 | } |
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| 241 | |
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| 242 | #if CONSOLE_USE_INTERRUPTS |
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| 243 | console_initialize_interrupts(); |
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| 244 | #endif |
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| 245 | |
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| 246 | return RTEMS_SUCCESSFUL; |
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| 247 | } |
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| 248 | |
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| 249 | /* PAGE |
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| 250 | * |
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| 251 | * console_write_support |
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| 252 | * |
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| 253 | * Console Termios output entry point. |
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| 254 | * |
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| 255 | */ |
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| 256 | int console_write_support( |
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[6128a4a] | 257 | int minor, |
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| 258 | const char *buf, |
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[9c448e1] | 259 | int len) |
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| 260 | { |
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| 261 | int nwrite = 0; |
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[dac4208] | 262 | volatile uint8_t *csr; |
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[9c448e1] | 263 | int port = minor; |
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| 264 | |
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[6128a4a] | 265 | /* |
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| 266 | * verify port Number |
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[9c448e1] | 267 | */ |
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| 268 | assert ( port < NUM_Z85C30_PORTS ); |
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| 269 | |
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| 270 | /* |
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| 271 | * Set the csr based upon the port number. |
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| 272 | */ |
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| 273 | csr = Ports_85C30[ port ].ctrl; |
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| 274 | |
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| 275 | /* |
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| 276 | * poll each byte in the string out of the port. |
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| 277 | */ |
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| 278 | while (nwrite < len) { |
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| 279 | #if (CONSOLE_USE_INTERRUPTS) |
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| 280 | console_outbyte_interrupts( &Ports_85C30[ port ], *buf++ ); |
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| 281 | #else |
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| 282 | outbyte_polled_85c30( csr, *buf++ ); |
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| 283 | #endif |
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| 284 | nwrite++; |
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| 285 | } |
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| 286 | |
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| 287 | /* |
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| 288 | * return the number of bytes written. |
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| 289 | */ |
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| 290 | return nwrite; |
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| 291 | } |
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| 292 | |
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| 293 | /* PAGE |
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| 294 | * |
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| 295 | * console_open |
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| 296 | * |
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| 297 | * open a port as a termios console. |
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| 298 | * |
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| 299 | */ |
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| 300 | rtems_device_driver console_open( |
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| 301 | rtems_device_major_number major, |
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| 302 | rtems_device_minor_number minor, |
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| 303 | void * arg |
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| 304 | ) |
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| 305 | { |
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| 306 | rtems_status_code sc; |
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| 307 | int port = minor; |
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| 308 | #if (CONSOLE_USE_INTERRUPTS) |
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| 309 | rtems_libio_open_close_args_t *args = arg; |
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| 310 | static const rtems_termios_callbacks intrCallbacks = { |
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| 311 | NULL, /* firstOpen */ |
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| 312 | NULL, /* lastClose */ |
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| 313 | NULL, /* pollRead */ |
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| 314 | console_write_support, /* write */ |
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| 315 | NULL, /* setAttributes */ |
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| 316 | NULL, /* stopRemoteTx */ |
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| 317 | NULL, /* startRemoteTx */ |
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| 318 | 1 /* outputUsesInterrupts */ |
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| 319 | }; |
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| 320 | #else |
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| 321 | static const rtems_termios_callbacks pollCallbacks = { |
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| 322 | NULL, /* firstOpen */ |
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| 323 | NULL, /* lastClose */ |
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| 324 | console_inbyte_nonblocking, /* pollRead */ |
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| 325 | console_write_support, /* write */ |
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| 326 | NULL, /* setAttributes */ |
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| 327 | NULL, /* stopRemoteTx */ |
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| 328 | NULL, /* startRemoteTx */ |
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| 329 | 0 /* outputUsesInterrupts */ |
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| 330 | }; |
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| 331 | #endif |
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| 332 | |
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| 333 | /* |
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| 334 | * Verify the minor number is valid. |
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| 335 | */ |
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| 336 | if (minor < 0) |
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| 337 | return RTEMS_INVALID_NUMBER; |
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| 338 | |
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| 339 | if ( port > NUM_Z85C30_PORTS ) |
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| 340 | return RTEMS_INVALID_NUMBER; |
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| 341 | |
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| 342 | /* |
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| 343 | * open the port as a termios console driver. |
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| 344 | */ |
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| 345 | |
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| 346 | #if (CONSOLE_USE_INTERRUPTS) |
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| 347 | sc = rtems_termios_open( major, minor, arg, &intrCallbacks ); |
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| 348 | |
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| 349 | Ports_85C30[ minor ].Protocol->console_termios_data = args->iop->data1; |
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| 350 | #else |
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| 351 | sc = rtems_termios_open( major, minor, arg, &pollCallbacks ); |
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| 352 | #endif |
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| 353 | |
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| 354 | return sc; |
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| 355 | } |
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| 356 | |
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| 357 | #if (CONSOLE_USE_INTERRUPTS) |
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| 358 | |
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| 359 | /* |
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| 360 | * console_outbyte_interrupts |
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| 361 | * |
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| 362 | * This routine transmits a character out. |
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| 363 | * |
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| 364 | * Input parameters: |
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| 365 | * port - port to transmit character to |
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| 366 | * ch - character to be transmitted |
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| 367 | * |
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| 368 | * Output parameters: NONE |
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| 369 | * |
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| 370 | * Return values: NONE |
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| 371 | */ |
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| 372 | void console_outbyte_interrupts( |
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| 373 | const Port_85C30_info *Port, |
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| 374 | char ch |
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| 375 | ) |
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| 376 | { |
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| 377 | Console_Protocol *protocol; |
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[dac4208] | 378 | uint32_t isrlevel; |
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[9c448e1] | 379 | |
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| 380 | protocol = Port->Protocol; |
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[6128a4a] | 381 | |
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[9c448e1] | 382 | /* |
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| 383 | * If this is the first character then we need to prime the pump |
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| 384 | */ |
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| 385 | |
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[3551166d] | 386 | if ( protocol->Is_TX_active == false ) { |
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[9c448e1] | 387 | |
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| 388 | rtems_interrupt_disable( isrlevel ); |
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[3551166d] | 389 | protocol->Is_TX_active = true; |
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[9c448e1] | 390 | outbyte_polled_85c30( Port->ctrl, ch ); |
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| 391 | rtems_interrupt_enable( isrlevel ); |
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| 392 | |
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| 393 | return; |
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| 394 | } |
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| 395 | |
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| 396 | while ( Ring_buffer_Is_full( &protocol->TX_Buffer ) ); |
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[6128a4a] | 397 | |
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[9c448e1] | 398 | Ring_buffer_Add_character( &protocol->TX_Buffer, ch ); |
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| 399 | } |
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| 400 | |
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| 401 | #endif |
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[bb41881e] | 402 | |
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| 403 | /* const char arg to be compatible with BSP_output_char decl. */ |
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| 404 | void |
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| 405 | debug_putc_onlcr(const char c) |
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| 406 | { |
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| 407 | int console; |
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| 408 | volatile uint8_t *csr; |
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| 409 | uint32_t isrlevel; |
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| 410 | |
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| 411 | console = USE_FOR_CONSOLE; |
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| 412 | csr = Ports_85C30[ console ].ctrl; |
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| 413 | |
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[40e7ae2] | 414 | if ('\n'==c){ |
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| 415 | rtems_interrupt_disable( isrlevel ); |
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| 416 | outbyte_polled_85c30( csr, '\r' ); |
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| 417 | asm volatile("isync"); |
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[31a5ec8] | 418 | rtems_interrupt_enable( isrlevel ); |
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[40e7ae2] | 419 | } |
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| 420 | |
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[bb41881e] | 421 | rtems_interrupt_disable( isrlevel ); |
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| 422 | outbyte_polled_85c30( csr, c ); |
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[31a5ec8] | 423 | asm volatile("isync"); |
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[bb41881e] | 424 | rtems_interrupt_enable( isrlevel ); |
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| 425 | } |
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| 426 | |
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| 427 | BSP_output_char_function_type BSP_output_char = debug_putc_onlcr; |
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| 428 | /* const char arg to be compatible with BSP_output_char decl. */ |
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| 429 | |
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