1 | /* |
---|
2 | * This software is Copyright (C) 1998 by T.sqware - all rights limited |
---|
3 | * It is provided in to the public domain "as is", can be freely modified |
---|
4 | * as far as this copyight notice is kept unchanged, but does not imply |
---|
5 | * an endorsement by T.sqware of the product in which it is included. |
---|
6 | * |
---|
7 | * $Id$ |
---|
8 | */ |
---|
9 | |
---|
10 | #include <stdio.h> |
---|
11 | #include <bsp.h> |
---|
12 | #include <bsp/irq.h> |
---|
13 | #include <uart.h> |
---|
14 | #include <rtems/libio.h> |
---|
15 | #include <rtems/termiostypes.h> |
---|
16 | #include <termios.h> |
---|
17 | #include <assert.h> |
---|
18 | |
---|
19 | /* |
---|
20 | * Basic 16552 driver |
---|
21 | */ |
---|
22 | |
---|
23 | struct uart_data |
---|
24 | { |
---|
25 | int ioMode; |
---|
26 | int hwFlow; |
---|
27 | unsigned int ier; |
---|
28 | unsigned long baud; |
---|
29 | unsigned long databits; |
---|
30 | unsigned long parity; |
---|
31 | unsigned long stopbits; |
---|
32 | }; |
---|
33 | |
---|
34 | static struct uart_data uart_data[2]; |
---|
35 | |
---|
36 | /* |
---|
37 | * Macros to read/write register of uart, if configuration is |
---|
38 | * different just rewrite these macros |
---|
39 | */ |
---|
40 | |
---|
41 | static inline unsigned char |
---|
42 | uread(int uart, unsigned int reg) |
---|
43 | { |
---|
44 | register unsigned char val; |
---|
45 | |
---|
46 | if (uart == 0) { |
---|
47 | inport_byte(COM1_BASE_IO+reg, val); |
---|
48 | } else { |
---|
49 | inport_byte(COM2_BASE_IO+reg, val); |
---|
50 | } |
---|
51 | |
---|
52 | return val; |
---|
53 | } |
---|
54 | |
---|
55 | static inline void |
---|
56 | uwrite(int uart, int reg, unsigned int val) |
---|
57 | { |
---|
58 | if (uart == 0) { |
---|
59 | outport_byte(COM1_BASE_IO+reg, val); |
---|
60 | } else { |
---|
61 | outport_byte(COM2_BASE_IO+reg, val); |
---|
62 | } |
---|
63 | } |
---|
64 | |
---|
65 | #ifdef UARTDEBUG |
---|
66 | static void |
---|
67 | uartError(int uart) |
---|
68 | { |
---|
69 | unsigned char uartStatus, dummy; |
---|
70 | |
---|
71 | uartStatus = uread(uart, LSR); |
---|
72 | dummy = uread(uart, RBR); |
---|
73 | |
---|
74 | if (uartStatus & OE) |
---|
75 | printk("********* Over run Error **********\n"); |
---|
76 | if (uartStatus & PE) |
---|
77 | printk("********* Parity Error **********\n"); |
---|
78 | if (uartStatus & FE) |
---|
79 | printk("********* Framing Error **********\n"); |
---|
80 | if (uartStatus & BI) |
---|
81 | printk("********* Parity Error **********\n"); |
---|
82 | if (uartStatus & ERFIFO) |
---|
83 | printk("********* Error receive Fifo **********\n"); |
---|
84 | |
---|
85 | } |
---|
86 | #else |
---|
87 | inline void uartError(int uart) |
---|
88 | { |
---|
89 | unsigned char uartStatus; |
---|
90 | |
---|
91 | uartStatus = uread(uart, LSR); |
---|
92 | uartStatus = uread(uart, RBR); |
---|
93 | } |
---|
94 | #endif |
---|
95 | |
---|
96 | /* |
---|
97 | * Uart initialization, it is hardcoded to 8 bit, no parity, |
---|
98 | * one stop bit, FIFO, things to be changed |
---|
99 | * are baud rate and nad hw flow control, |
---|
100 | * and longest rx fifo setting |
---|
101 | */ |
---|
102 | void |
---|
103 | BSP_uart_init |
---|
104 | ( |
---|
105 | int uart, |
---|
106 | unsigned long baud, |
---|
107 | unsigned long databits, |
---|
108 | unsigned long parity, |
---|
109 | unsigned long stopbits, |
---|
110 | int hwFlow |
---|
111 | ) |
---|
112 | { |
---|
113 | unsigned char tmp; |
---|
114 | |
---|
115 | /* Sanity check */ |
---|
116 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
117 | |
---|
118 | switch(baud) |
---|
119 | { |
---|
120 | case 50: |
---|
121 | case 75: |
---|
122 | case 110: |
---|
123 | case 134: |
---|
124 | case 300: |
---|
125 | case 600: |
---|
126 | case 1200: |
---|
127 | case 2400: |
---|
128 | case 9600: |
---|
129 | case 19200: |
---|
130 | case 38400: |
---|
131 | case 57600: |
---|
132 | case 115200: |
---|
133 | break; |
---|
134 | default: |
---|
135 | assert(0); |
---|
136 | return; |
---|
137 | } |
---|
138 | |
---|
139 | /* Set DLAB bit to 1 */ |
---|
140 | uwrite(uart, LCR, DLAB); |
---|
141 | |
---|
142 | /* Set baud rate */ |
---|
143 | uwrite(uart, DLL, (BSPBaseBaud/baud) & 0xff); |
---|
144 | uwrite(uart, DLM, ((BSPBaseBaud/baud) >> 8) & 0xff); |
---|
145 | |
---|
146 | /* 8-bit, no parity , 1 stop */ |
---|
147 | uwrite(uart, LCR, databits | parity | stopbits); |
---|
148 | |
---|
149 | /* Set DTR, RTS and OUT2 high */ |
---|
150 | uwrite(uart, MCR, DTR | RTS | OUT_2); |
---|
151 | |
---|
152 | /* Enable FIFO */ |
---|
153 | uwrite(uart, FCR, FIFO_EN | XMIT_RESET | RCV_RESET | RECEIVE_FIFO_TRIGGER12); |
---|
154 | |
---|
155 | /* Disable Interrupts */ |
---|
156 | uwrite(uart, IER, 0); |
---|
157 | |
---|
158 | /* Read status to clear them */ |
---|
159 | tmp = uread(uart, LSR); |
---|
160 | tmp = uread(uart, RBR); |
---|
161 | tmp = uread(uart, MSR); |
---|
162 | |
---|
163 | /* Remember state */ |
---|
164 | uart_data[uart].baud = baud; |
---|
165 | uart_data[uart].databits = databits; |
---|
166 | uart_data[uart].parity = parity; |
---|
167 | uart_data[uart].stopbits = stopbits; |
---|
168 | uart_data[uart].hwFlow = hwFlow; |
---|
169 | return; |
---|
170 | } |
---|
171 | |
---|
172 | /* |
---|
173 | * Set baud |
---|
174 | */ |
---|
175 | |
---|
176 | void |
---|
177 | BSP_uart_set_baud( |
---|
178 | int uart, |
---|
179 | unsigned long baud |
---|
180 | ) |
---|
181 | { |
---|
182 | /* Sanity check */ |
---|
183 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
184 | |
---|
185 | BSP_uart_set_attributes( uart, baud, uart_data[uart].databits, |
---|
186 | uart_data[uart].parity, uart_data[uart].stopbits ); |
---|
187 | } |
---|
188 | |
---|
189 | /* |
---|
190 | * Set all attributes |
---|
191 | */ |
---|
192 | |
---|
193 | void |
---|
194 | BSP_uart_set_attributes |
---|
195 | ( |
---|
196 | int uart, |
---|
197 | unsigned long baud, |
---|
198 | unsigned long databits, |
---|
199 | unsigned long parity, |
---|
200 | unsigned long stopbits |
---|
201 | ) |
---|
202 | { |
---|
203 | unsigned char mcr, ier; |
---|
204 | |
---|
205 | /* Sanity check */ |
---|
206 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
207 | |
---|
208 | /* |
---|
209 | * This function may be called whenever TERMIOS parameters |
---|
210 | * are changed, so we have to make sure that baud change is |
---|
211 | * indeed required |
---|
212 | */ |
---|
213 | |
---|
214 | if( (baud == uart_data[uart].baud) && |
---|
215 | (databits == uart_data[uart].databits) && |
---|
216 | (parity == uart_data[uart].parity) && |
---|
217 | (stopbits == uart_data[uart].stopbits) ) |
---|
218 | { |
---|
219 | return; |
---|
220 | } |
---|
221 | |
---|
222 | mcr = uread(uart, MCR); |
---|
223 | ier = uread(uart, IER); |
---|
224 | |
---|
225 | BSP_uart_init(uart, baud, databits, parity, stopbits, uart_data[uart].hwFlow); |
---|
226 | |
---|
227 | uwrite(uart, MCR, mcr); |
---|
228 | uwrite(uart, IER, ier); |
---|
229 | |
---|
230 | return; |
---|
231 | } |
---|
232 | |
---|
233 | /* |
---|
234 | * Enable/disable interrupts |
---|
235 | */ |
---|
236 | void |
---|
237 | BSP_uart_intr_ctrl(int uart, int cmd) |
---|
238 | { |
---|
239 | int iStatus = (int)INTERRUPT_DISABLE; |
---|
240 | |
---|
241 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
242 | |
---|
243 | switch(cmd) |
---|
244 | { |
---|
245 | case BSP_UART_INTR_CTRL_ENABLE: |
---|
246 | iStatus |= (RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE | TRANSMIT_ENABLE); |
---|
247 | if ( uart_data[uart].hwFlow ) { |
---|
248 | iStatus |= MODEM_ENABLE; |
---|
249 | } |
---|
250 | break; |
---|
251 | case BSP_UART_INTR_CTRL_TERMIOS: |
---|
252 | iStatus |= (RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE); |
---|
253 | if ( uart_data[uart].hwFlow ) { |
---|
254 | iStatus |= MODEM_ENABLE; |
---|
255 | } |
---|
256 | break; |
---|
257 | case BSP_UART_INTR_CTRL_GDB: |
---|
258 | iStatus |= RECEIVE_ENABLE; |
---|
259 | break; |
---|
260 | } |
---|
261 | |
---|
262 | uart_data[uart].ier = iStatus; |
---|
263 | uwrite(uart, IER, iStatus); |
---|
264 | |
---|
265 | return; |
---|
266 | } |
---|
267 | |
---|
268 | void |
---|
269 | BSP_uart_throttle(int uart) |
---|
270 | { |
---|
271 | unsigned int mcr; |
---|
272 | |
---|
273 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
274 | |
---|
275 | if(!uart_data[uart].hwFlow) |
---|
276 | { |
---|
277 | /* Should not happen */ |
---|
278 | assert(0); |
---|
279 | return; |
---|
280 | } |
---|
281 | mcr = uread (uart, MCR); |
---|
282 | /* RTS down */ |
---|
283 | mcr &= ~RTS; |
---|
284 | uwrite(uart, MCR, mcr); |
---|
285 | |
---|
286 | return; |
---|
287 | } |
---|
288 | |
---|
289 | void |
---|
290 | BSP_uart_unthrottle(int uart) |
---|
291 | { |
---|
292 | unsigned int mcr; |
---|
293 | |
---|
294 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
295 | |
---|
296 | if(!uart_data[uart].hwFlow) |
---|
297 | { |
---|
298 | /* Should not happen */ |
---|
299 | assert(0); |
---|
300 | return; |
---|
301 | } |
---|
302 | mcr = uread (uart, MCR); |
---|
303 | /* RTS up */ |
---|
304 | mcr |= RTS; |
---|
305 | uwrite(uart, MCR, mcr); |
---|
306 | |
---|
307 | return; |
---|
308 | } |
---|
309 | |
---|
310 | /* |
---|
311 | * Status function, -1 if error |
---|
312 | * detected, 0 if no received chars available, |
---|
313 | * 1 if received char available, 2 if break |
---|
314 | * is detected, it will eat break and error |
---|
315 | * chars. It ignores overruns - we cannot do |
---|
316 | * anything about - it execpt count statistics |
---|
317 | * and we are not counting it. |
---|
318 | */ |
---|
319 | int |
---|
320 | BSP_uart_polled_status(int uart) |
---|
321 | { |
---|
322 | unsigned char val; |
---|
323 | |
---|
324 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
325 | |
---|
326 | val = uread(uart, LSR); |
---|
327 | |
---|
328 | if(val & BI) |
---|
329 | { |
---|
330 | /* BREAK found, eat character */ |
---|
331 | uread(uart, RBR); |
---|
332 | return BSP_UART_STATUS_BREAK; |
---|
333 | } |
---|
334 | |
---|
335 | if((val & (DR | OE | FE)) == 1) |
---|
336 | { |
---|
337 | /* No error, character present */ |
---|
338 | return BSP_UART_STATUS_CHAR; |
---|
339 | } |
---|
340 | |
---|
341 | if((val & (DR | OE | FE)) == 0) |
---|
342 | { |
---|
343 | /* Nothing */ |
---|
344 | return BSP_UART_STATUS_NOCHAR; |
---|
345 | } |
---|
346 | |
---|
347 | /* |
---|
348 | * Framing or parity error |
---|
349 | * eat character |
---|
350 | */ |
---|
351 | uread(uart, RBR); |
---|
352 | |
---|
353 | return BSP_UART_STATUS_ERROR; |
---|
354 | } |
---|
355 | |
---|
356 | /* |
---|
357 | * Polled mode write function |
---|
358 | */ |
---|
359 | void |
---|
360 | BSP_uart_polled_write(int uart, int val) |
---|
361 | { |
---|
362 | unsigned char val1; |
---|
363 | |
---|
364 | /* Sanity check */ |
---|
365 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
366 | |
---|
367 | for(;;) |
---|
368 | { |
---|
369 | if((val1=uread(uart, LSR)) & THRE) |
---|
370 | { |
---|
371 | break; |
---|
372 | } |
---|
373 | } |
---|
374 | |
---|
375 | if(uart_data[uart].hwFlow) |
---|
376 | { |
---|
377 | for(;;) |
---|
378 | { |
---|
379 | if(uread(uart, MSR) & CTS) |
---|
380 | { |
---|
381 | break; |
---|
382 | } |
---|
383 | } |
---|
384 | } |
---|
385 | |
---|
386 | uwrite(uart, THR, val & 0xff); |
---|
387 | |
---|
388 | /* |
---|
389 | * Wait for character to be transmitted. |
---|
390 | * This ensures that printk and printf play nicely together |
---|
391 | * when using the same serial port. |
---|
392 | * Yes, there's a performance hit here, but if we're doing |
---|
393 | * polled writes to a serial port we're probably not that |
---|
394 | * interested in efficiency anyway..... |
---|
395 | */ |
---|
396 | for(;;) |
---|
397 | { |
---|
398 | if((val1=uread(uart, LSR)) & THRE) |
---|
399 | { |
---|
400 | break; |
---|
401 | } |
---|
402 | } |
---|
403 | |
---|
404 | return; |
---|
405 | } |
---|
406 | |
---|
407 | void |
---|
408 | BSP_output_char_via_serial(int val) |
---|
409 | { |
---|
410 | BSP_uart_polled_write(BSPConsolePort, val); |
---|
411 | if (val == '\n') BSP_uart_polled_write(BSPConsolePort,'\r'); |
---|
412 | } |
---|
413 | |
---|
414 | /* |
---|
415 | * Polled mode read function |
---|
416 | */ |
---|
417 | int |
---|
418 | BSP_uart_polled_read(int uart) |
---|
419 | { |
---|
420 | unsigned char val; |
---|
421 | |
---|
422 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
423 | |
---|
424 | for(;;) |
---|
425 | { |
---|
426 | if(uread(uart, LSR) & DR) |
---|
427 | { |
---|
428 | break; |
---|
429 | } |
---|
430 | } |
---|
431 | |
---|
432 | val = uread(uart, RBR); |
---|
433 | |
---|
434 | return (int)(val & 0xff); |
---|
435 | } |
---|
436 | |
---|
437 | unsigned |
---|
438 | BSP_poll_char_via_serial() |
---|
439 | { |
---|
440 | return BSP_uart_polled_read(BSPConsolePort); |
---|
441 | } |
---|
442 | |
---|
443 | /* ================ Termios support =================*/ |
---|
444 | |
---|
445 | static volatile int termios_stopped_com1 = 0; |
---|
446 | static volatile int termios_tx_active_com1 = 0; |
---|
447 | static void* termios_ttyp_com1 = NULL; |
---|
448 | static char termios_tx_hold_com1 = 0; |
---|
449 | static volatile char termios_tx_hold_valid_com1 = 0; |
---|
450 | |
---|
451 | static volatile int termios_stopped_com2 = 0; |
---|
452 | static volatile int termios_tx_active_com2 = 0; |
---|
453 | static void* termios_ttyp_com2 = NULL; |
---|
454 | static char termios_tx_hold_com2 = 0; |
---|
455 | static volatile char termios_tx_hold_valid_com2 = 0; |
---|
456 | |
---|
457 | static void ( *driver_input_handler_com1 )( void *, char *, int ) = 0; |
---|
458 | static void ( *driver_input_handler_com2 )( void *, char *, int ) = 0; |
---|
459 | |
---|
460 | /* |
---|
461 | * This routine sets the handler to handle the characters received |
---|
462 | * from the serial port. |
---|
463 | */ |
---|
464 | void uart_set_driver_handler( int port, void ( *handler )( void *, char *, int ) ) |
---|
465 | { |
---|
466 | switch( port ) |
---|
467 | { |
---|
468 | case BSP_UART_COM1: |
---|
469 | driver_input_handler_com1 = handler; |
---|
470 | break; |
---|
471 | |
---|
472 | case BSP_UART_COM2: |
---|
473 | driver_input_handler_com2 = handler; |
---|
474 | break; |
---|
475 | } |
---|
476 | } |
---|
477 | |
---|
478 | /* |
---|
479 | * Set channel parameters |
---|
480 | */ |
---|
481 | void |
---|
482 | BSP_uart_termios_set(int uart, void *ttyp) |
---|
483 | { |
---|
484 | struct rtems_termios_tty *p = (struct rtems_termios_tty *)ttyp; |
---|
485 | unsigned char val; |
---|
486 | assert(uart == BSP_UART_COM1 || uart == BSP_UART_COM2); |
---|
487 | |
---|
488 | if(uart == BSP_UART_COM1) |
---|
489 | { |
---|
490 | uart_data[uart].ioMode = p->device.outputUsesInterrupts; |
---|
491 | if(uart_data[uart].hwFlow) |
---|
492 | { |
---|
493 | val = uread(uart, MSR); |
---|
494 | |
---|
495 | termios_stopped_com1 = (val & CTS) ? 0 : 1; |
---|
496 | } |
---|
497 | else |
---|
498 | { |
---|
499 | termios_stopped_com1 = 0; |
---|
500 | } |
---|
501 | termios_tx_active_com1 = 0; |
---|
502 | termios_ttyp_com1 = ttyp; |
---|
503 | termios_tx_hold_com1 = 0; |
---|
504 | termios_tx_hold_valid_com1 = 0; |
---|
505 | } |
---|
506 | else |
---|
507 | { |
---|
508 | uart_data[uart].ioMode = p->device.outputUsesInterrupts; |
---|
509 | if(uart_data[uart].hwFlow) |
---|
510 | { |
---|
511 | val = uread(uart, MSR); |
---|
512 | |
---|
513 | termios_stopped_com2 = (val & CTS) ? 0 : 1; |
---|
514 | } |
---|
515 | else |
---|
516 | { |
---|
517 | termios_stopped_com2 = 0; |
---|
518 | } |
---|
519 | termios_tx_active_com2 = 0; |
---|
520 | termios_ttyp_com2 = ttyp; |
---|
521 | termios_tx_hold_com2 = 0; |
---|
522 | termios_tx_hold_valid_com2 = 0; |
---|
523 | } |
---|
524 | |
---|
525 | return; |
---|
526 | } |
---|
527 | |
---|
528 | int |
---|
529 | BSP_uart_termios_read_com1(int uart) |
---|
530 | { |
---|
531 | int off = (int)0; |
---|
532 | char buf[40]; |
---|
533 | |
---|
534 | /* read bytes */ |
---|
535 | while (( off < sizeof(buf) ) && ( uread(BSP_UART_COM1, LSR) & DR )) { |
---|
536 | buf[off++] = uread(BSP_UART_COM1, RBR); |
---|
537 | } |
---|
538 | |
---|
539 | /* write out data */ |
---|
540 | if ( off > 0 ) { |
---|
541 | rtems_termios_enqueue_raw_characters(termios_ttyp_com1, buf, off); |
---|
542 | } |
---|
543 | |
---|
544 | /* enable receive interrupts */ |
---|
545 | uart_data[BSP_UART_COM1].ier |= (RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE); |
---|
546 | uwrite(BSP_UART_COM1, IER, uart_data[BSP_UART_COM1].ier); |
---|
547 | |
---|
548 | return ( EOF ); |
---|
549 | } |
---|
550 | |
---|
551 | int |
---|
552 | BSP_uart_termios_read_com2(int uart) |
---|
553 | { |
---|
554 | int off = (int)0; |
---|
555 | char buf[40]; |
---|
556 | |
---|
557 | /* read current byte */ |
---|
558 | while (( off < sizeof(buf) ) && ( uread(BSP_UART_COM2, LSR) & DR )) { |
---|
559 | buf[off++] = uread(BSP_UART_COM2, RBR); |
---|
560 | } |
---|
561 | |
---|
562 | /* write out data */ |
---|
563 | if ( off > 0 ) { |
---|
564 | rtems_termios_enqueue_raw_characters(termios_ttyp_com2, buf, off); |
---|
565 | } |
---|
566 | |
---|
567 | /* enable receive interrupts */ |
---|
568 | uart_data[BSP_UART_COM2].ier |= (RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE); |
---|
569 | uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier); |
---|
570 | |
---|
571 | return ( EOF ); |
---|
572 | } |
---|
573 | |
---|
574 | int |
---|
575 | BSP_uart_termios_write_com1(int minor, const char *buf, int len) |
---|
576 | { |
---|
577 | assert(buf != NULL); |
---|
578 | |
---|
579 | if(len <= 0) |
---|
580 | { |
---|
581 | return 0; |
---|
582 | } |
---|
583 | |
---|
584 | /* If there TX buffer is busy - something is royally screwed up */ |
---|
585 | assert((uread(BSP_UART_COM1, LSR) & THRE) != 0); |
---|
586 | |
---|
587 | if(termios_stopped_com1) |
---|
588 | { |
---|
589 | /* CTS low */ |
---|
590 | termios_tx_hold_com1 = *buf; |
---|
591 | termios_tx_hold_valid_com1 = 1; |
---|
592 | return 0; |
---|
593 | } |
---|
594 | |
---|
595 | /* Write character */ |
---|
596 | uwrite(BSP_UART_COM1, THR, *buf & 0xff); |
---|
597 | |
---|
598 | /* Enable interrupts if necessary */ |
---|
599 | if ( !termios_tx_active_com1 ) { |
---|
600 | termios_tx_active_com1 = 1; |
---|
601 | uart_data[BSP_UART_COM1].ier |= TRANSMIT_ENABLE; |
---|
602 | uwrite(BSP_UART_COM1, IER, uart_data[BSP_UART_COM1].ier); |
---|
603 | } |
---|
604 | |
---|
605 | return 0; |
---|
606 | } |
---|
607 | |
---|
608 | int |
---|
609 | BSP_uart_termios_write_com2(int minor, const char *buf, int len) |
---|
610 | { |
---|
611 | assert(buf != NULL); |
---|
612 | |
---|
613 | if(len <= 0) |
---|
614 | { |
---|
615 | return 0; |
---|
616 | } |
---|
617 | |
---|
618 | /* If there TX buffer is busy - something is royally screwed up */ |
---|
619 | assert((uread(BSP_UART_COM2, LSR) & THRE) != 0); |
---|
620 | |
---|
621 | if(termios_stopped_com2) |
---|
622 | { |
---|
623 | /* CTS low */ |
---|
624 | termios_tx_hold_com2 = *buf; |
---|
625 | termios_tx_hold_valid_com2 = 1; |
---|
626 | return 0; |
---|
627 | } |
---|
628 | |
---|
629 | /* Write character */ |
---|
630 | uwrite(BSP_UART_COM2, THR, *buf & 0xff); |
---|
631 | |
---|
632 | /* Enable interrupts if necessary */ |
---|
633 | if ( !termios_tx_active_com2 ) { |
---|
634 | termios_tx_active_com2 = 1; |
---|
635 | uart_data[BSP_UART_COM2].ier |= TRANSMIT_ENABLE; |
---|
636 | uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier); |
---|
637 | } |
---|
638 | |
---|
639 | return 0; |
---|
640 | } |
---|
641 | |
---|
642 | void |
---|
643 | BSP_uart_termios_isr_com1(void) |
---|
644 | { |
---|
645 | unsigned char buf[40]; |
---|
646 | unsigned char val; |
---|
647 | int off, ret, vect; |
---|
648 | |
---|
649 | off = 0; |
---|
650 | |
---|
651 | for(;;) |
---|
652 | { |
---|
653 | vect = uread(BSP_UART_COM1, IIR) & 0xf; |
---|
654 | |
---|
655 | switch(vect) |
---|
656 | { |
---|
657 | case MODEM_STATUS : |
---|
658 | val = uread(BSP_UART_COM1, MSR); |
---|
659 | if(uart_data[BSP_UART_COM1].hwFlow) |
---|
660 | { |
---|
661 | if(val & CTS) |
---|
662 | { |
---|
663 | /* CTS high */ |
---|
664 | termios_stopped_com1 = 0; |
---|
665 | if(termios_tx_hold_valid_com1) |
---|
666 | { |
---|
667 | termios_tx_hold_valid_com1 = 0; |
---|
668 | BSP_uart_termios_write_com1(0, &termios_tx_hold_com1, |
---|
669 | 1); |
---|
670 | } |
---|
671 | } |
---|
672 | else |
---|
673 | { |
---|
674 | /* CTS low */ |
---|
675 | termios_stopped_com1 = 1; |
---|
676 | } |
---|
677 | } |
---|
678 | break; |
---|
679 | case NO_MORE_INTR : |
---|
680 | /* No more interrupts */ |
---|
681 | if(off != 0) |
---|
682 | { |
---|
683 | /* Update rx buffer */ |
---|
684 | if( driver_input_handler_com1 ) |
---|
685 | { |
---|
686 | driver_input_handler_com1( termios_ttyp_com1, (char *)buf, off ); |
---|
687 | } |
---|
688 | else |
---|
689 | { |
---|
690 | /* Update rx buffer */ |
---|
691 | rtems_termios_enqueue_raw_characters(termios_ttyp_com1, (char *)buf, off ); |
---|
692 | } |
---|
693 | } |
---|
694 | return; |
---|
695 | case TRANSMITTER_HODING_REGISTER_EMPTY : |
---|
696 | /* |
---|
697 | * TX holding empty: we have to disable these interrupts |
---|
698 | * if there is nothing more to send. |
---|
699 | */ |
---|
700 | |
---|
701 | /* If nothing else to send disable interrupts */ |
---|
702 | ret = rtems_termios_dequeue_characters(termios_ttyp_com1, 1); |
---|
703 | if ( ret == 0 ) { |
---|
704 | termios_tx_active_com1 = 0; |
---|
705 | uart_data[BSP_UART_COM1].ier &= ~(TRANSMIT_ENABLE); |
---|
706 | uwrite(BSP_UART_COM1, IER, uart_data[BSP_UART_COM1].ier); |
---|
707 | } |
---|
708 | break; |
---|
709 | case RECEIVER_DATA_AVAIL : |
---|
710 | case CHARACTER_TIMEOUT_INDICATION: |
---|
711 | if ( uart_data[BSP_UART_COM1].ioMode == TERMIOS_TASK_DRIVEN ) { |
---|
712 | /* ensure interrupts are enabled */ |
---|
713 | if ( uart_data[BSP_UART_COM1].ier & RECEIVE_ENABLE ) { |
---|
714 | /* disable interrupts and notify termios */ |
---|
715 | uart_data[BSP_UART_COM1].ier &= ~(RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE); |
---|
716 | uwrite(BSP_UART_COM1, IER, uart_data[BSP_UART_COM1].ier); |
---|
717 | rtems_termios_rxirq_occured(termios_ttyp_com1); |
---|
718 | } |
---|
719 | } |
---|
720 | else { |
---|
721 | /* RX data ready */ |
---|
722 | assert(off < sizeof(buf)); |
---|
723 | buf[off++] = uread(BSP_UART_COM1, RBR); |
---|
724 | } |
---|
725 | break; |
---|
726 | case RECEIVER_ERROR: |
---|
727 | /* RX error: eat character */ |
---|
728 | uartError(BSP_UART_COM1); |
---|
729 | break; |
---|
730 | default: |
---|
731 | /* Should not happen */ |
---|
732 | assert(0); |
---|
733 | return; |
---|
734 | } |
---|
735 | } |
---|
736 | } |
---|
737 | |
---|
738 | void |
---|
739 | BSP_uart_termios_isr_com2() |
---|
740 | { |
---|
741 | unsigned char buf[40]; |
---|
742 | unsigned char val; |
---|
743 | int off, ret, vect; |
---|
744 | |
---|
745 | off = 0; |
---|
746 | |
---|
747 | for(;;) |
---|
748 | { |
---|
749 | vect = uread(BSP_UART_COM2, IIR) & 0xf; |
---|
750 | |
---|
751 | switch(vect) |
---|
752 | { |
---|
753 | case MODEM_STATUS : |
---|
754 | val = uread(BSP_UART_COM2, MSR); |
---|
755 | if(uart_data[BSP_UART_COM2].hwFlow) |
---|
756 | { |
---|
757 | if(val & CTS) |
---|
758 | { |
---|
759 | /* CTS high */ |
---|
760 | termios_stopped_com2 = 0; |
---|
761 | if(termios_tx_hold_valid_com2) |
---|
762 | { |
---|
763 | termios_tx_hold_valid_com2 = 0; |
---|
764 | BSP_uart_termios_write_com2(0, &termios_tx_hold_com2, |
---|
765 | 1); |
---|
766 | } |
---|
767 | } |
---|
768 | else |
---|
769 | { |
---|
770 | /* CTS low */ |
---|
771 | termios_stopped_com2 = 1; |
---|
772 | } |
---|
773 | } |
---|
774 | break; |
---|
775 | case NO_MORE_INTR : |
---|
776 | /* No more interrupts */ |
---|
777 | if(off != 0) |
---|
778 | { |
---|
779 | /* Update rx buffer */ |
---|
780 | if( driver_input_handler_com2 ) |
---|
781 | { |
---|
782 | driver_input_handler_com2( termios_ttyp_com2, (char *)buf, off ); |
---|
783 | } |
---|
784 | else |
---|
785 | { |
---|
786 | rtems_termios_enqueue_raw_characters(termios_ttyp_com2, (char *)buf, off); |
---|
787 | } |
---|
788 | } |
---|
789 | return; |
---|
790 | case TRANSMITTER_HODING_REGISTER_EMPTY : |
---|
791 | /* |
---|
792 | * TX holding empty: we have to disable these interrupts |
---|
793 | * if there is nothing more to send. |
---|
794 | */ |
---|
795 | |
---|
796 | /* If nothing else to send disable interrupts */ |
---|
797 | ret = rtems_termios_dequeue_characters(termios_ttyp_com2, 1); |
---|
798 | if ( ret == 0 ) { |
---|
799 | termios_tx_active_com2 = 0; |
---|
800 | uart_data[BSP_UART_COM2].ier &= ~(TRANSMIT_ENABLE); |
---|
801 | uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier); |
---|
802 | } |
---|
803 | break; |
---|
804 | case RECEIVER_DATA_AVAIL : |
---|
805 | case CHARACTER_TIMEOUT_INDICATION: |
---|
806 | if ( uart_data[BSP_UART_COM2].ioMode == TERMIOS_TASK_DRIVEN ) { |
---|
807 | /* ensure interrupts are enabled */ |
---|
808 | if ( uart_data[BSP_UART_COM2].ier & RECEIVE_ENABLE ) { |
---|
809 | /* disable interrupts and notify termios */ |
---|
810 | uart_data[BSP_UART_COM2].ier &= ~(RECEIVE_ENABLE | RECEIVER_LINE_ST_ENABLE); |
---|
811 | uwrite(BSP_UART_COM2, IER, uart_data[BSP_UART_COM2].ier); |
---|
812 | rtems_termios_rxirq_occured(termios_ttyp_com2); |
---|
813 | } |
---|
814 | } |
---|
815 | else { |
---|
816 | /* RX data ready */ |
---|
817 | assert(off < sizeof(buf)); |
---|
818 | buf[off++] = uread(BSP_UART_COM2, RBR); |
---|
819 | } |
---|
820 | break; |
---|
821 | case RECEIVER_ERROR: |
---|
822 | /* RX error: eat character */ |
---|
823 | uartError(BSP_UART_COM2); |
---|
824 | break; |
---|
825 | default: |
---|
826 | /* Should not happen */ |
---|
827 | assert(0); |
---|
828 | return; |
---|
829 | } |
---|
830 | } |
---|
831 | } |
---|
832 | |
---|
833 | /* ================= GDB support ===================*/ |
---|
834 | int BSP_uart_dbgisr_com_regsav[4] __attribute__ ((unused)); |
---|
835 | |
---|
836 | /* |
---|
837 | * Interrupt service routine for COM1 - all, |
---|
838 | * it does it check whether ^C is received |
---|
839 | * if yes it will flip TF bit before returning |
---|
840 | * Note: it should be installed as raw interrupt |
---|
841 | * handler |
---|
842 | */ |
---|
843 | |
---|
844 | asm (".p2align 4"); |
---|
845 | asm (".text"); |
---|
846 | asm (".globl BSP_uart_dbgisr_com1"); |
---|
847 | asm ("BSP_uart_dbgisr_com1:"); |
---|
848 | asm (" movl %eax, BSP_uart_dbgisr_com_regsav"); /* Save eax */ |
---|
849 | asm (" movl %ebx, BSP_uart_dbgisr_com_regsav + 4"); /* Save ebx */ |
---|
850 | asm (" movl %edx, BSP_uart_dbgisr_com_regsav + 8"); /* Save edx */ |
---|
851 | |
---|
852 | asm (" movl $0, %ebx"); /* Clear flag */ |
---|
853 | |
---|
854 | /* |
---|
855 | * We know that only receive related interrupts |
---|
856 | * are available, eat chars |
---|
857 | */ |
---|
858 | asm ("uart_dbgisr_com1_1:"); |
---|
859 | asm (" movw $0x3FD, %dx"); |
---|
860 | asm (" inb %dx, %al"); /* Read LSR */ |
---|
861 | asm (" andb $1, %al"); |
---|
862 | asm (" cmpb $0, %al"); |
---|
863 | asm (" je uart_dbgisr_com1_2"); |
---|
864 | asm (" movw $0x3F8, %dx"); |
---|
865 | asm (" inb %dx, %al"); /* Get input character */ |
---|
866 | asm (" cmpb $3, %al"); |
---|
867 | asm (" jne uart_dbgisr_com1_1"); |
---|
868 | |
---|
869 | /* ^C received, set flag */ |
---|
870 | asm (" movl $1, %ebx"); |
---|
871 | asm (" jmp uart_dbgisr_com1_1"); |
---|
872 | |
---|
873 | /* All chars read */ |
---|
874 | asm ("uart_dbgisr_com1_2:"); |
---|
875 | |
---|
876 | /* If flag is set we have to tweak TF */ |
---|
877 | asm (" cmpl $0, %ebx"); |
---|
878 | asm (" je uart_dbgisr_com1_3"); |
---|
879 | |
---|
880 | /* Flag is set */ |
---|
881 | asm (" movl BSP_uart_dbgisr_com_regsav+4, %ebx"); /* Restore ebx */ |
---|
882 | asm (" movl BSP_uart_dbgisr_com_regsav+8, %edx"); /* Restore edx */ |
---|
883 | |
---|
884 | /* Set TF bit */ |
---|
885 | asm (" popl %eax"); /* Pop eip */ |
---|
886 | asm (" movl %eax, BSP_uart_dbgisr_com_regsav + 4"); /* Save it */ |
---|
887 | asm (" popl %eax"); /* Pop cs */ |
---|
888 | asm (" movl %eax, BSP_uart_dbgisr_com_regsav + 8"); /* Save it */ |
---|
889 | asm (" popl %eax"); /* Pop flags */ |
---|
890 | asm (" orl $0x100, %eax"); /* Modify it */ |
---|
891 | asm (" pushl %eax"); /* Push it back */ |
---|
892 | asm (" movl BSP_uart_dbgisr_com_regsav+8, %eax"); /* Put back cs */ |
---|
893 | asm (" pushl %eax"); |
---|
894 | asm (" movl BSP_uart_dbgisr_com_regsav+4, %eax"); /* Put back eip */ |
---|
895 | asm (" pushl %eax"); |
---|
896 | |
---|
897 | /* Acknowledge IRQ */ |
---|
898 | asm (" movb $0x20, %al"); |
---|
899 | asm (" outb %al, $0x20"); |
---|
900 | asm (" movl BSP_uart_dbgisr_com_regsav, %eax"); /* Restore eax */ |
---|
901 | asm (" iret"); /* Done */ |
---|
902 | |
---|
903 | /* Flag is not set */ |
---|
904 | asm("uart_dbgisr_com1_3:"); |
---|
905 | asm (" movl BSP_uart_dbgisr_com_regsav+4, %ebx"); /* Restore ebx */ |
---|
906 | asm (" movl BSP_uart_dbgisr_com_regsav+8, %edx"); /* Restore edx */ |
---|
907 | |
---|
908 | /* Acknowledge irq */ |
---|
909 | asm (" movb $0x20, %al"); |
---|
910 | asm (" outb %al, $0x20"); |
---|
911 | asm (" movl BSP_uart_dbgisr_com_regsav, %eax"); /* Restore eax */ |
---|
912 | asm (" iret"); /* Done */ |
---|
913 | |
---|
914 | /* |
---|
915 | * Interrupt service routine for COM2 - all, |
---|
916 | * it does it check whether ^C is received |
---|
917 | * if yes it will flip TF bit before returning |
---|
918 | * Note: it has to be installed as raw interrupt |
---|
919 | * handler |
---|
920 | */ |
---|
921 | asm (".p2align 4"); |
---|
922 | asm (".text"); |
---|
923 | asm (".globl BSP_uart_dbgisr_com2"); |
---|
924 | asm ("BSP_uart_dbgisr_com2:"); |
---|
925 | asm (" movl %eax, BSP_uart_dbgisr_com_regsav"); /* Save eax */ |
---|
926 | asm (" movl %ebx, BSP_uart_dbgisr_com_regsav + 4"); /* Save ebx */ |
---|
927 | asm (" movl %edx, BSP_uart_dbgisr_com_regsav + 8"); /* Save edx */ |
---|
928 | |
---|
929 | asm (" movl $0, %ebx"); /* Clear flag */ |
---|
930 | |
---|
931 | /* |
---|
932 | * We know that only receive related interrupts |
---|
933 | * are available, eat chars |
---|
934 | */ |
---|
935 | asm ("uart_dbgisr_com2_1:"); |
---|
936 | asm (" movw $0x2FD, %dx"); |
---|
937 | asm (" inb %dx, %al"); /* Read LSR */ |
---|
938 | asm (" andb $1, %al"); |
---|
939 | asm (" cmpb $0, %al"); |
---|
940 | asm (" je uart_dbgisr_com2_2"); |
---|
941 | asm (" movw $0x2F8, %dx"); |
---|
942 | asm (" inb %dx, %al"); /* Get input character */ |
---|
943 | asm (" cmpb $3, %al"); |
---|
944 | asm (" jne uart_dbgisr_com2_1"); |
---|
945 | |
---|
946 | /* ^C received, set flag */ |
---|
947 | asm (" movl $1, %ebx"); |
---|
948 | asm (" jmp uart_dbgisr_com2_1"); |
---|
949 | |
---|
950 | /* All chars read */ |
---|
951 | asm ("uart_dbgisr_com2_2:"); |
---|
952 | |
---|
953 | /* If flag is set we have to tweak TF */ |
---|
954 | asm (" cmpl $0, %ebx"); |
---|
955 | asm (" je uart_dbgisr_com2_3"); |
---|
956 | |
---|
957 | /* Flag is set */ |
---|
958 | asm (" movl BSP_uart_dbgisr_com_regsav+4, %ebx"); /* Restore ebx */ |
---|
959 | asm (" movl BSP_uart_dbgisr_com_regsav+8, %edx"); /* Restore edx */ |
---|
960 | |
---|
961 | /* Set TF bit */ |
---|
962 | asm (" popl %eax"); /* Pop eip */ |
---|
963 | asm (" movl %eax, BSP_uart_dbgisr_com_regsav + 4"); /* Save it */ |
---|
964 | asm (" popl %eax"); /* Pop cs */ |
---|
965 | asm (" movl %eax, BSP_uart_dbgisr_com_regsav + 8"); /* Save it */ |
---|
966 | asm (" popl %eax"); /* Pop flags */ |
---|
967 | asm (" orl $0x100, %eax"); /* Modify it */ |
---|
968 | asm (" pushl %eax"); /* Push it back */ |
---|
969 | asm (" movl BSP_uart_dbgisr_com_regsav+8, %eax"); /* Put back cs */ |
---|
970 | asm (" pushl %eax"); |
---|
971 | asm (" movl BSP_uart_dbgisr_com_regsav+4, %eax"); /* Put back eip */ |
---|
972 | asm (" pushl %eax"); |
---|
973 | |
---|
974 | /* Acknowledge IRQ */ |
---|
975 | asm (" movb $0x20, %al"); |
---|
976 | asm (" outb %al, $0x20"); |
---|
977 | asm (" movl BSP_uart_dbgisr_com_regsav, %eax"); /* Restore eax */ |
---|
978 | asm (" iret"); /* Done */ |
---|
979 | |
---|
980 | /* Flag is not set */ |
---|
981 | asm("uart_dbgisr_com2_3:"); |
---|
982 | asm (" movl BSP_uart_dbgisr_com_regsav+4, %ebx"); /* Restore ebx */ |
---|
983 | asm (" movl BSP_uart_dbgisr_com_regsav+8, %edx"); /* Restore edx */ |
---|
984 | |
---|
985 | /* Acknowledge irq */ |
---|
986 | asm (" movb $0x20, %al"); |
---|
987 | asm (" outb %al, $0x20"); |
---|
988 | asm (" movl BSP_uart_dbgisr_com_regsav, %eax"); /* Restore eax */ |
---|
989 | asm (" iret"); /* Done */ |
---|