1 | /* |
---|
2 | * This file contains the Motorola IDP console IO package. |
---|
3 | */ |
---|
4 | |
---|
5 | /* |
---|
6 | * Written by Doug McBride, Colorado Space Grant College |
---|
7 | * Based off of the board support packages of RTEMS |
---|
8 | * |
---|
9 | * Updated to RTEMS 3.2.0 by Joel Sherrill. |
---|
10 | */ |
---|
11 | |
---|
12 | #define MIDP_INIT |
---|
13 | |
---|
14 | #include <bsp.h> |
---|
15 | #include <rtems/libio.h> |
---|
16 | |
---|
17 | #include <rtems/ringbuf.h> |
---|
18 | |
---|
19 | Ring_buffer_t Console_Buffer[ 2 ]; |
---|
20 | |
---|
21 | rtems_isr C_Receive_ISR(rtems_vector_number vector); |
---|
22 | |
---|
23 | /* console_initialize |
---|
24 | * |
---|
25 | * This routine initializes the console IO driver. |
---|
26 | */ |
---|
27 | rtems_device_driver console_initialize( |
---|
28 | rtems_device_major_number major, |
---|
29 | rtems_device_minor_number minor, |
---|
30 | void *arg |
---|
31 | ) |
---|
32 | { |
---|
33 | rtems_status_code status; |
---|
34 | |
---|
35 | Ring_buffer_Initialize( &Console_Buffer[ 0 ] ); |
---|
36 | Ring_buffer_Initialize( &Console_Buffer[ 1 ] ); |
---|
37 | |
---|
38 | init_pit(); |
---|
39 | |
---|
40 | status = rtems_io_register_name( |
---|
41 | "/dev/console", |
---|
42 | major, |
---|
43 | (rtems_device_minor_number) 0 |
---|
44 | ); |
---|
45 | |
---|
46 | if (status != RTEMS_SUCCESSFUL) |
---|
47 | rtems_fatal_error_occurred(status); |
---|
48 | |
---|
49 | status = rtems_io_register_name( |
---|
50 | "/dev/tty00", |
---|
51 | major, |
---|
52 | (rtems_device_minor_number) 0 |
---|
53 | ); |
---|
54 | |
---|
55 | if (status != RTEMS_SUCCESSFUL) |
---|
56 | rtems_fatal_error_occurred(status); |
---|
57 | |
---|
58 | status = rtems_io_register_name( |
---|
59 | "/dev/tty01", |
---|
60 | major, |
---|
61 | (rtems_device_minor_number) 1 |
---|
62 | ); |
---|
63 | |
---|
64 | if (status != RTEMS_SUCCESSFUL) |
---|
65 | rtems_fatal_error_occurred(status); |
---|
66 | |
---|
67 | return RTEMS_SUCCESSFUL; |
---|
68 | } |
---|
69 | |
---|
70 | /* is_character_ready |
---|
71 | * |
---|
72 | * This routine returns TRUE if a character is available. |
---|
73 | */ |
---|
74 | static bool is_character_ready( |
---|
75 | char *ch, |
---|
76 | int port |
---|
77 | ) |
---|
78 | { |
---|
79 | if ( Ring_buffer_Is_empty( &Console_Buffer[ port ] ) ) |
---|
80 | return false; |
---|
81 | |
---|
82 | Ring_buffer_Remove_character( &Console_Buffer[ port ], *ch ); |
---|
83 | return true; |
---|
84 | } |
---|
85 | |
---|
86 | /* inbyte |
---|
87 | * |
---|
88 | * This routine reads a character from the UART through a buffer. |
---|
89 | */ |
---|
90 | static char inbyte( |
---|
91 | int port |
---|
92 | ) |
---|
93 | { |
---|
94 | char tmp_char; |
---|
95 | |
---|
96 | /* If you come into this routine without checking is_character_ready() first |
---|
97 | and you want nonblocking code, then it's your own fault */ |
---|
98 | |
---|
99 | while ( !is_character_ready( &tmp_char, port ) ); |
---|
100 | |
---|
101 | return tmp_char; |
---|
102 | } |
---|
103 | |
---|
104 | /* outbyte |
---|
105 | * |
---|
106 | * This routine transmits a character out the M68681. It supports |
---|
107 | * XON/XOFF flow control. |
---|
108 | */ |
---|
109 | static void outbyte( |
---|
110 | char ch, |
---|
111 | int port |
---|
112 | ) |
---|
113 | { |
---|
114 | switch ( port ) { |
---|
115 | case 0: |
---|
116 | transmit_char( ch ); |
---|
117 | break; |
---|
118 | case 1: |
---|
119 | transmit_char_portb( ch ); |
---|
120 | break; |
---|
121 | } |
---|
122 | |
---|
123 | } |
---|
124 | |
---|
125 | /* |
---|
126 | * Open entry point |
---|
127 | */ |
---|
128 | rtems_device_driver console_open( |
---|
129 | rtems_device_major_number major, |
---|
130 | rtems_device_minor_number minor, |
---|
131 | void * arg |
---|
132 | ) |
---|
133 | { |
---|
134 | return RTEMS_SUCCESSFUL; |
---|
135 | } |
---|
136 | |
---|
137 | /* |
---|
138 | * Close entry point |
---|
139 | */ |
---|
140 | rtems_device_driver console_close( |
---|
141 | rtems_device_major_number major, |
---|
142 | rtems_device_minor_number minor, |
---|
143 | void * arg |
---|
144 | ) |
---|
145 | { |
---|
146 | return RTEMS_SUCCESSFUL; |
---|
147 | } |
---|
148 | |
---|
149 | /* |
---|
150 | * read bytes from the serial port. We only have stdin. |
---|
151 | */ |
---|
152 | rtems_device_driver console_read( |
---|
153 | rtems_device_major_number major, |
---|
154 | rtems_device_minor_number minor, |
---|
155 | void * arg |
---|
156 | ) |
---|
157 | { |
---|
158 | rtems_libio_rw_args_t *rw_args; |
---|
159 | char *buffer; |
---|
160 | int maximum; |
---|
161 | int count = 0; |
---|
162 | |
---|
163 | rw_args = (rtems_libio_rw_args_t *) arg; |
---|
164 | |
---|
165 | buffer = rw_args->buffer; |
---|
166 | maximum = rw_args->count; |
---|
167 | |
---|
168 | if ( minor > 1 ) |
---|
169 | return RTEMS_INVALID_NUMBER; |
---|
170 | |
---|
171 | for (count = 0; count < maximum; count++) { |
---|
172 | buffer[ count ] = inbyte( minor ); |
---|
173 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
---|
174 | buffer[ count++ ] = '\n'; |
---|
175 | break; |
---|
176 | } |
---|
177 | } |
---|
178 | |
---|
179 | rw_args->bytes_moved = count; |
---|
180 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
---|
181 | } |
---|
182 | |
---|
183 | /* |
---|
184 | * write bytes to the serial port. Stdout and stderr are the same. |
---|
185 | */ |
---|
186 | rtems_device_driver console_write( |
---|
187 | rtems_device_major_number major, |
---|
188 | rtems_device_minor_number minor, |
---|
189 | void * arg |
---|
190 | ) |
---|
191 | { |
---|
192 | int count; |
---|
193 | int maximum; |
---|
194 | rtems_libio_rw_args_t *rw_args; |
---|
195 | char *buffer; |
---|
196 | |
---|
197 | rw_args = (rtems_libio_rw_args_t *) arg; |
---|
198 | |
---|
199 | buffer = rw_args->buffer; |
---|
200 | maximum = rw_args->count; |
---|
201 | |
---|
202 | if ( minor > 1 ) |
---|
203 | return RTEMS_INVALID_NUMBER; |
---|
204 | |
---|
205 | for (count = 0; count < maximum; count++) { |
---|
206 | if ( buffer[ count ] == '\n') { |
---|
207 | outbyte('\r', minor ); |
---|
208 | } |
---|
209 | outbyte( buffer[ count ], minor ); |
---|
210 | } |
---|
211 | |
---|
212 | rw_args->bytes_moved = maximum; |
---|
213 | return 0; |
---|
214 | } |
---|
215 | |
---|
216 | /* |
---|
217 | * IO Control entry point |
---|
218 | */ |
---|
219 | |
---|
220 | rtems_device_driver console_control( |
---|
221 | rtems_device_major_number major, |
---|
222 | rtems_device_minor_number minor, |
---|
223 | void * arg |
---|
224 | ) |
---|
225 | { |
---|
226 | return RTEMS_SUCCESSFUL; |
---|
227 | } |
---|