1 | /* |
---|
2 | * This file contains the MVME147 console IO package. |
---|
3 | * |
---|
4 | * COPYRIGHT (c) 1989-1997. |
---|
5 | * On-Line Applications Research Corporation (OAR). |
---|
6 | * Copyright assigned to U.S. Government, 1994. |
---|
7 | * |
---|
8 | * The license and distribution terms for this file may in |
---|
9 | * the file LICENSE in this distribution or at |
---|
10 | * http://www.OARcorp.com/rtems/license.html. |
---|
11 | * |
---|
12 | * MVME147 port for TNI - Telecom Bretagne |
---|
13 | * by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr) |
---|
14 | * May 1996 |
---|
15 | * |
---|
16 | * This file was taken from the DMV152 bsp |
---|
17 | * |
---|
18 | * $Id$ |
---|
19 | */ |
---|
20 | |
---|
21 | #define M147_INIT |
---|
22 | |
---|
23 | #include <bsp.h> |
---|
24 | #include <rtems/libio.h> |
---|
25 | #include <z8530.h> |
---|
26 | |
---|
27 | |
---|
28 | /* console_initialize |
---|
29 | * |
---|
30 | * This routine initializes the console IO driver. |
---|
31 | * |
---|
32 | * Input parameters: NONE |
---|
33 | * |
---|
34 | * Output parameters: NONE |
---|
35 | * |
---|
36 | * Return values: |
---|
37 | */ |
---|
38 | |
---|
39 | rtems_device_driver console_initialize( |
---|
40 | rtems_device_major_number major, |
---|
41 | rtems_device_minor_number minor, |
---|
42 | void *arg |
---|
43 | ) |
---|
44 | { |
---|
45 | rtems_status_code status; |
---|
46 | |
---|
47 | status = rtems_io_register_name( |
---|
48 | "/dev/console", |
---|
49 | major, |
---|
50 | (rtems_device_minor_number) 0 |
---|
51 | ); |
---|
52 | |
---|
53 | if (status != RTEMS_SUCCESSFUL) |
---|
54 | rtems_fatal_error_occurred(status); |
---|
55 | |
---|
56 | return RTEMS_SUCCESSFUL; |
---|
57 | } |
---|
58 | |
---|
59 | /* is_character_ready |
---|
60 | * |
---|
61 | * This routine returns TRUE if a character is available. |
---|
62 | * |
---|
63 | * Input parameters: NONE |
---|
64 | * |
---|
65 | * Output parameters: NONE |
---|
66 | * |
---|
67 | * Return values: |
---|
68 | */ |
---|
69 | |
---|
70 | rtems_boolean is_character_ready( |
---|
71 | char *ch |
---|
72 | ) |
---|
73 | { |
---|
74 | rtems_unsigned8 rr_0; |
---|
75 | |
---|
76 | for ( ; ; ) { |
---|
77 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
---|
78 | if ( !(rr_0 & RR_0_RX_DATA_AVAILABLE) ) |
---|
79 | return( FALSE ); |
---|
80 | |
---|
81 | Z8x30_READ_DATA( CONSOLE_DATA, *ch ); |
---|
82 | return( TRUE ); |
---|
83 | } |
---|
84 | } |
---|
85 | |
---|
86 | /* inbyte |
---|
87 | * |
---|
88 | * This routine reads a character from the SCC. |
---|
89 | * |
---|
90 | * Input parameters: NONE |
---|
91 | * |
---|
92 | * Output parameters: NONE |
---|
93 | * |
---|
94 | * Return values: |
---|
95 | * character read from SCC |
---|
96 | */ |
---|
97 | |
---|
98 | char inbyte( void ) |
---|
99 | { |
---|
100 | rtems_unsigned8 rr_0; |
---|
101 | char ch; |
---|
102 | |
---|
103 | for ( ; ; ) { |
---|
104 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
---|
105 | if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) != 0 ) |
---|
106 | break; |
---|
107 | } |
---|
108 | |
---|
109 | Z8x30_READ_DATA( CONSOLE_DATA, ch ); |
---|
110 | return ( ch ); |
---|
111 | } |
---|
112 | |
---|
113 | /* outbyte |
---|
114 | * |
---|
115 | * This routine transmits a character out the SCC. It supports |
---|
116 | * XON/XOFF flow control. |
---|
117 | * |
---|
118 | * Input parameters: |
---|
119 | * ch - character to be transmitted |
---|
120 | * |
---|
121 | * Output parameters: NONE |
---|
122 | */ |
---|
123 | |
---|
124 | void outbyte( |
---|
125 | char ch |
---|
126 | ) |
---|
127 | { |
---|
128 | rtems_unsigned8 rr_0; |
---|
129 | char flow_control; |
---|
130 | |
---|
131 | for ( ; ; ) { |
---|
132 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
---|
133 | if ( (rr_0 & RR_0_TX_BUFFER_EMPTY) != 0 ) |
---|
134 | break; |
---|
135 | } |
---|
136 | |
---|
137 | for ( ; ; ) { |
---|
138 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
---|
139 | if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ) |
---|
140 | break; |
---|
141 | |
---|
142 | Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); |
---|
143 | |
---|
144 | if ( flow_control == XOFF ) |
---|
145 | do { |
---|
146 | do { |
---|
147 | Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 ); |
---|
148 | } while ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 ); |
---|
149 | Z8x30_READ_DATA( CONSOLE_DATA, flow_control ); |
---|
150 | } while ( flow_control != XON ); |
---|
151 | } |
---|
152 | |
---|
153 | Z8x30_WRITE_DATA( CONSOLE_DATA, ch ); |
---|
154 | } |
---|
155 | |
---|
156 | /* |
---|
157 | * Open entry point |
---|
158 | */ |
---|
159 | |
---|
160 | rtems_device_driver console_open( |
---|
161 | rtems_device_major_number major, |
---|
162 | rtems_device_minor_number minor, |
---|
163 | void * arg |
---|
164 | ) |
---|
165 | { |
---|
166 | return RTEMS_SUCCESSFUL; |
---|
167 | } |
---|
168 | |
---|
169 | /* |
---|
170 | * Close entry point |
---|
171 | */ |
---|
172 | |
---|
173 | rtems_device_driver console_close( |
---|
174 | rtems_device_major_number major, |
---|
175 | rtems_device_minor_number minor, |
---|
176 | void * arg |
---|
177 | ) |
---|
178 | { |
---|
179 | return RTEMS_SUCCESSFUL; |
---|
180 | } |
---|
181 | |
---|
182 | /* |
---|
183 | * read bytes from the serial port. We only have stdin. |
---|
184 | */ |
---|
185 | |
---|
186 | rtems_device_driver console_read( |
---|
187 | rtems_device_major_number major, |
---|
188 | rtems_device_minor_number minor, |
---|
189 | void * arg |
---|
190 | ) |
---|
191 | { |
---|
192 | rtems_libio_rw_args_t *rw_args; |
---|
193 | char *buffer; |
---|
194 | int maximum; |
---|
195 | int count = 0; |
---|
196 | |
---|
197 | rw_args = (rtems_libio_rw_args_t *) arg; |
---|
198 | |
---|
199 | buffer = rw_args->buffer; |
---|
200 | maximum = rw_args->count; |
---|
201 | |
---|
202 | for (count = 0; count < maximum; count++) { |
---|
203 | buffer[ count ] = inbyte(); |
---|
204 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
---|
205 | buffer[ count++ ] = '\n'; |
---|
206 | buffer[ count ] = 0; |
---|
207 | break; |
---|
208 | } |
---|
209 | } |
---|
210 | |
---|
211 | rw_args->bytes_moved = count; |
---|
212 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
---|
213 | } |
---|
214 | |
---|
215 | /* |
---|
216 | * write bytes to the serial port. Stdout and stderr are the same. |
---|
217 | */ |
---|
218 | |
---|
219 | rtems_device_driver console_write( |
---|
220 | rtems_device_major_number major, |
---|
221 | rtems_device_minor_number minor, |
---|
222 | void * arg |
---|
223 | ) |
---|
224 | { |
---|
225 | int count; |
---|
226 | int maximum; |
---|
227 | rtems_libio_rw_args_t *rw_args; |
---|
228 | char *buffer; |
---|
229 | |
---|
230 | rw_args = (rtems_libio_rw_args_t *) arg; |
---|
231 | |
---|
232 | buffer = rw_args->buffer; |
---|
233 | maximum = rw_args->count; |
---|
234 | |
---|
235 | for (count = 0; count < maximum; count++) { |
---|
236 | if ( buffer[ count ] == '\n') { |
---|
237 | outbyte('\r'); |
---|
238 | } |
---|
239 | outbyte( buffer[ count ] ); |
---|
240 | } |
---|
241 | |
---|
242 | rw_args->bytes_moved = maximum; |
---|
243 | return 0; |
---|
244 | } |
---|
245 | |
---|
246 | /* |
---|
247 | * IO Control entry point |
---|
248 | */ |
---|
249 | |
---|
250 | rtems_device_driver console_control( |
---|
251 | rtems_device_major_number major, |
---|
252 | rtems_device_minor_number minor, |
---|
253 | void * arg |
---|
254 | ) |
---|
255 | { |
---|
256 | return RTEMS_SUCCESSFUL; |
---|
257 | } |
---|
258 | |
---|