1 | /* |
---|
2 | * This file contains the PowerPC 403GA console IO package. |
---|
3 | * |
---|
4 | * Author: Andrew Bray <andy@i-cubed.co.uk> |
---|
5 | * |
---|
6 | * COPYRIGHT (c) 1995 by i-cubed ltd. |
---|
7 | * |
---|
8 | * To anyone who acknowledges that this file is provided "AS IS" |
---|
9 | * without any express or implied warranty: |
---|
10 | * permission to use, copy, modify, and distribute this file |
---|
11 | * for any purpose is hereby granted without fee, provided that |
---|
12 | * the above copyright notice and this notice appears in all |
---|
13 | * copies, and that the name of i-cubed limited not be used in |
---|
14 | * advertising or publicity pertaining to distribution of the |
---|
15 | * software without specific, written prior permission. |
---|
16 | * i-cubed limited makes no representations about the suitability |
---|
17 | * of this software for any purpose. |
---|
18 | * |
---|
19 | * Derived from c/src/lib/libbsp/no_cpu/no_bsp/console/console.c: |
---|
20 | * |
---|
21 | * COPYRIGHT (c) 1989-1998. |
---|
22 | * On-Line Applications Research Corporation (OAR). |
---|
23 | * Copyright assigned to U.S. Government, 1994. |
---|
24 | * |
---|
25 | * The license and distribution terms for this file may be |
---|
26 | * found in the file LICENSE in this distribution or at |
---|
27 | * http://www.OARcorp.com/rtems/license.html. |
---|
28 | * |
---|
29 | * $Id$ |
---|
30 | */ |
---|
31 | |
---|
32 | #define NO_BSP_INIT |
---|
33 | |
---|
34 | #include <bsp.h> |
---|
35 | #include <rtems/libio.h> |
---|
36 | |
---|
37 | extern rtems_cpu_table Cpu_table; /* owned by BSP */ |
---|
38 | |
---|
39 | struct async { |
---|
40 | /*-----------------------------------------------------------------------------+ |
---|
41 | | Line Status Register. |
---|
42 | +-----------------------------------------------------------------------------*/ |
---|
43 | unsigned char SPLS; |
---|
44 | unsigned char SPLSset; |
---|
45 | #define LSRDataReady 0x80 |
---|
46 | #define LSRFramingError 0x40 |
---|
47 | #define LSROverrunError 0x20 |
---|
48 | #define LSRParityError 0x10 |
---|
49 | #define LSRBreakInterrupt 0x08 |
---|
50 | #define LSRTxHoldEmpty 0x04 |
---|
51 | #define LSRTxShiftEmpty 0x02 |
---|
52 | |
---|
53 | /*-----------------------------------------------------------------------------+ |
---|
54 | | Handshake Status Register. |
---|
55 | +-----------------------------------------------------------------------------*/ |
---|
56 | unsigned char SPHS; |
---|
57 | unsigned char SPHSset; |
---|
58 | #define HSRDsr 0x80 |
---|
59 | #define HSRCts 0x40 |
---|
60 | |
---|
61 | /*-----------------------------------------------------------------------------+ |
---|
62 | | Baud rate divisor registers |
---|
63 | +-----------------------------------------------------------------------------*/ |
---|
64 | unsigned char BRDH; |
---|
65 | unsigned char BRDL; |
---|
66 | |
---|
67 | /*-----------------------------------------------------------------------------+ |
---|
68 | | Control Register. |
---|
69 | +-----------------------------------------------------------------------------*/ |
---|
70 | unsigned char SPCTL; |
---|
71 | #define CRNormal 0x00 |
---|
72 | #define CRLoopback 0x40 |
---|
73 | #define CRAutoEcho 0x80 |
---|
74 | #define CRDtr 0x20 |
---|
75 | #define CRRts 0x10 |
---|
76 | #define CRWordLength7 0x00 |
---|
77 | #define CRWordLength8 0x08 |
---|
78 | #define CRParityDisable 0x00 |
---|
79 | #define CRParityEnable 0x04 |
---|
80 | #define CREvenParity 0x00 |
---|
81 | #define CROddParity 0x02 |
---|
82 | #define CRStopBitsOne 0x00 |
---|
83 | #define CRStopBitsTwo 0x01 |
---|
84 | #define CRDisableDtrRts 0x00 |
---|
85 | |
---|
86 | /*-----------------------------------------------------------------------------+ |
---|
87 | | Receiver Command Register. |
---|
88 | +-----------------------------------------------------------------------------*/ |
---|
89 | unsigned char SPRC; |
---|
90 | #define RCRDisable 0x00 |
---|
91 | #define RCREnable 0x80 |
---|
92 | #define RCRIntDisable 0x00 |
---|
93 | #define RCRIntEnabled 0x20 |
---|
94 | #define RCRDMACh2 0x40 |
---|
95 | #define RCRDMACh3 0x60 |
---|
96 | #define RCRErrorInt 0x10 |
---|
97 | #define RCRPauseEnable 0x08 |
---|
98 | |
---|
99 | /*-----------------------------------------------------------------------------+ |
---|
100 | | Transmitter Command Register. |
---|
101 | +-----------------------------------------------------------------------------*/ |
---|
102 | unsigned char SPTC; |
---|
103 | #define TCRDisable 0x00 |
---|
104 | #define TCREnable 0x80 |
---|
105 | #define TCRIntDisable 0x00 |
---|
106 | #define TCRIntEnabled 0x20 |
---|
107 | #define TCRDMACh2 0x40 |
---|
108 | #define TCRDMACh3 0x60 |
---|
109 | #define TCRTxEmpty 0x10 |
---|
110 | #define TCRErrorInt 0x08 |
---|
111 | #define TCRStopPause 0x04 |
---|
112 | #define TCRBreakGen 0x02 |
---|
113 | |
---|
114 | /*-----------------------------------------------------------------------------+ |
---|
115 | | Miscellanies defines. |
---|
116 | +-----------------------------------------------------------------------------*/ |
---|
117 | unsigned char SPTB; |
---|
118 | #define SPRB SPTB |
---|
119 | }; |
---|
120 | |
---|
121 | #define XOFFchar 0x13 |
---|
122 | #define XONchar 0x11 |
---|
123 | |
---|
124 | typedef volatile struct async *pasync; |
---|
125 | static const pasync port = (pasync)0x40000000; |
---|
126 | |
---|
127 | /* console_initialize |
---|
128 | * |
---|
129 | * This routine initializes the console IO driver. |
---|
130 | * |
---|
131 | * Input parameters: NONE |
---|
132 | * |
---|
133 | * Output parameters: NONE |
---|
134 | * |
---|
135 | * Return values: |
---|
136 | */ |
---|
137 | |
---|
138 | rtems_device_driver console_initialize( |
---|
139 | rtems_device_major_number major, |
---|
140 | rtems_device_minor_number minor, |
---|
141 | void *arg |
---|
142 | ) |
---|
143 | { |
---|
144 | rtems_status_code status; |
---|
145 | register unsigned tmp; |
---|
146 | |
---|
147 | /* Initialise the serial port */ |
---|
148 | asm volatile ("mfdcr %0, 0xa0" : "=r" (tmp)); /* IOCR */ |
---|
149 | tmp &= ~3; |
---|
150 | tmp |= (Cpu_table.serial_external_clock ? 2 : 0) | |
---|
151 | (Cpu_table.serial_cts_rts ? 1 : 0); |
---|
152 | asm volatile ("mtdcr 0xa0, %0" : "=r" (tmp) : "0" (tmp)); /* IOCR */ |
---|
153 | port->SPLS = (LSRDataReady | LSRFramingError | LSROverrunError | |
---|
154 | LSRParityError | LSRBreakInterrupt); |
---|
155 | tmp = Cpu_table.serial_per_sec / Cpu_table.serial_rate; |
---|
156 | #if 0 /* replaced by IMD... */ |
---|
157 | tmp = ((tmp + 8) >> 4) - 1; |
---|
158 | port->BRDL = tmp & 0x255; |
---|
159 | port->BRDH = tmp >> 8; |
---|
160 | #else |
---|
161 | tmp = ((tmp) >> 4) - 1; |
---|
162 | port->BRDL = tmp & 0xff; |
---|
163 | port->BRDH = tmp >> 8; |
---|
164 | #endif |
---|
165 | port->SPCTL = (CRNormal | CRDtr | CRRts | CRWordLength8 | CRParityDisable | |
---|
166 | CRStopBitsOne); |
---|
167 | port->SPRC = (RCREnable | RCRIntDisable | RCRPauseEnable); |
---|
168 | port->SPTC = (TCREnable | TCRIntDisable); |
---|
169 | port->SPHS = (HSRDsr | HSRCts); |
---|
170 | |
---|
171 | status = rtems_io_register_name( |
---|
172 | "/dev/console", |
---|
173 | major, |
---|
174 | (rtems_device_minor_number) 0 |
---|
175 | ); |
---|
176 | |
---|
177 | if (status != RTEMS_SUCCESSFUL) |
---|
178 | rtems_fatal_error_occurred(status); |
---|
179 | |
---|
180 | return RTEMS_SUCCESSFUL; |
---|
181 | } |
---|
182 | |
---|
183 | |
---|
184 | /* is_character_ready |
---|
185 | * |
---|
186 | * This routine returns TRUE if a character is available. |
---|
187 | * |
---|
188 | * Input parameters: NONE |
---|
189 | * |
---|
190 | * Output parameters: NONE |
---|
191 | * |
---|
192 | * Return values: |
---|
193 | */ |
---|
194 | |
---|
195 | rtems_boolean is_character_ready( |
---|
196 | char *ch |
---|
197 | ) |
---|
198 | { |
---|
199 | unsigned char status; |
---|
200 | |
---|
201 | if ((status = port->SPLS) & LSRDataReady) |
---|
202 | { |
---|
203 | *ch = port->SPRB; |
---|
204 | return(TRUE); |
---|
205 | } |
---|
206 | |
---|
207 | /* Clean any dodgy status */ |
---|
208 | if ((status & (LSRFramingError | LSROverrunError | LSRParityError | |
---|
209 | LSRBreakInterrupt)) != 0) |
---|
210 | { |
---|
211 | port->SPLS = (LSRFramingError | LSROverrunError | LSRParityError | |
---|
212 | LSRBreakInterrupt); |
---|
213 | } |
---|
214 | |
---|
215 | return FALSE; |
---|
216 | } |
---|
217 | |
---|
218 | /* inbyte |
---|
219 | * |
---|
220 | * This routine reads a character from the SOURCE. |
---|
221 | * |
---|
222 | * Input parameters: NONE |
---|
223 | * |
---|
224 | * Output parameters: NONE |
---|
225 | * |
---|
226 | * Return values: |
---|
227 | * character read from SOURCE |
---|
228 | */ |
---|
229 | |
---|
230 | char inbyte( void ) |
---|
231 | { |
---|
232 | unsigned char status; |
---|
233 | |
---|
234 | while (1) |
---|
235 | { |
---|
236 | if ((status = port->SPLS) & LSRDataReady) |
---|
237 | break; |
---|
238 | |
---|
239 | /* Clean any dodgy status */ |
---|
240 | if ((status & (LSRFramingError | LSROverrunError | LSRParityError | |
---|
241 | LSRBreakInterrupt)) != 0) |
---|
242 | { |
---|
243 | port->SPLS = (LSRFramingError | LSROverrunError | LSRParityError | |
---|
244 | LSRBreakInterrupt); |
---|
245 | } |
---|
246 | } |
---|
247 | |
---|
248 | return port->SPRB; |
---|
249 | } |
---|
250 | |
---|
251 | /* outbyte |
---|
252 | * |
---|
253 | * This routine transmits a character out the SOURCE. It may support |
---|
254 | * XON/XOFF flow control. |
---|
255 | * |
---|
256 | * Input parameters: |
---|
257 | * ch - character to be transmitted |
---|
258 | * |
---|
259 | * Output parameters: NONE |
---|
260 | */ |
---|
261 | |
---|
262 | void outbyte( |
---|
263 | char ch |
---|
264 | ) |
---|
265 | { |
---|
266 | unsigned char status; |
---|
267 | |
---|
268 | while (port->SPHS) |
---|
269 | port->SPHS = (HSRDsr | HSRCts); |
---|
270 | |
---|
271 | while (1) |
---|
272 | { |
---|
273 | status = port->SPLS; |
---|
274 | |
---|
275 | if (port->SPHS) |
---|
276 | port->SPHS = (HSRDsr | HSRCts); |
---|
277 | else if (status & LSRTxHoldEmpty) |
---|
278 | break; |
---|
279 | } |
---|
280 | |
---|
281 | if (Cpu_table.serial_xon_xoff) |
---|
282 | while (is_character_ready(&status)) |
---|
283 | { |
---|
284 | if (status == XOFFchar) |
---|
285 | do { |
---|
286 | while (!is_character_ready(&status)); |
---|
287 | } while (status != XONchar); |
---|
288 | } |
---|
289 | |
---|
290 | port->SPTB = ch; |
---|
291 | } |
---|
292 | |
---|
293 | /* |
---|
294 | * Open entry point |
---|
295 | */ |
---|
296 | |
---|
297 | rtems_device_driver console_open( |
---|
298 | rtems_device_major_number major, |
---|
299 | rtems_device_minor_number minor, |
---|
300 | void * arg |
---|
301 | ) |
---|
302 | { |
---|
303 | return RTEMS_SUCCESSFUL; |
---|
304 | } |
---|
305 | |
---|
306 | /* |
---|
307 | * Close entry point |
---|
308 | */ |
---|
309 | |
---|
310 | rtems_device_driver console_close( |
---|
311 | rtems_device_major_number major, |
---|
312 | rtems_device_minor_number minor, |
---|
313 | void * arg |
---|
314 | ) |
---|
315 | { |
---|
316 | return RTEMS_SUCCESSFUL; |
---|
317 | } |
---|
318 | |
---|
319 | /* |
---|
320 | * read bytes from the serial port. We only have stdin. |
---|
321 | */ |
---|
322 | |
---|
323 | rtems_device_driver console_read( |
---|
324 | rtems_device_major_number major, |
---|
325 | rtems_device_minor_number minor, |
---|
326 | void * arg |
---|
327 | ) |
---|
328 | { |
---|
329 | rtems_libio_rw_args_t *rw_args; |
---|
330 | char *buffer; |
---|
331 | int maximum; |
---|
332 | int count = 0; |
---|
333 | |
---|
334 | rw_args = (rtems_libio_rw_args_t *) arg; |
---|
335 | |
---|
336 | buffer = rw_args->buffer; |
---|
337 | maximum = rw_args->count; |
---|
338 | |
---|
339 | for (count = 0; count < maximum; count++) { |
---|
340 | buffer[ count ] = inbyte(); |
---|
341 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
---|
342 | buffer[ count++ ] = '\n'; |
---|
343 | buffer[ count ] = 0; |
---|
344 | break; |
---|
345 | } |
---|
346 | } |
---|
347 | |
---|
348 | rw_args->bytes_moved = count; |
---|
349 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
---|
350 | } |
---|
351 | |
---|
352 | /* |
---|
353 | * write bytes to the serial port. Stdout and stderr are the same. |
---|
354 | */ |
---|
355 | |
---|
356 | rtems_device_driver console_write( |
---|
357 | rtems_device_major_number major, |
---|
358 | rtems_device_minor_number minor, |
---|
359 | void * arg |
---|
360 | ) |
---|
361 | { |
---|
362 | int count; |
---|
363 | int maximum; |
---|
364 | rtems_libio_rw_args_t *rw_args; |
---|
365 | char *buffer; |
---|
366 | |
---|
367 | rw_args = (rtems_libio_rw_args_t *) arg; |
---|
368 | |
---|
369 | buffer = rw_args->buffer; |
---|
370 | maximum = rw_args->count; |
---|
371 | |
---|
372 | for (count = 0; count < maximum; count++) { |
---|
373 | if ( buffer[ count ] == '\n') { |
---|
374 | outbyte('\r'); |
---|
375 | } |
---|
376 | outbyte( buffer[ count ] ); |
---|
377 | } |
---|
378 | return maximum; |
---|
379 | } |
---|
380 | |
---|
381 | /* |
---|
382 | * IO Control entry point |
---|
383 | */ |
---|
384 | |
---|
385 | rtems_device_driver console_control( |
---|
386 | rtems_device_major_number major, |
---|
387 | rtems_device_minor_number minor, |
---|
388 | void * arg |
---|
389 | ) |
---|
390 | { |
---|
391 | return RTEMS_SUCCESSFUL; |
---|
392 | } |
---|
393 | |
---|