1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup mpc55xx_esci |
---|
5 | * |
---|
6 | * @brief Source file for the Enhanced Serial Communication Interface (eSCI). |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * Copyright (c) 2008 |
---|
11 | * Embedded Brains GmbH |
---|
12 | * Obere Lagerstr. 30 |
---|
13 | * D-82178 Puchheim |
---|
14 | * Germany |
---|
15 | * rtems@embedded-brains.de |
---|
16 | * |
---|
17 | * The license and distribution terms for this file may be found in the file |
---|
18 | * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE. |
---|
19 | */ |
---|
20 | |
---|
21 | /* Include order is important */ |
---|
22 | #include <mpc55xx/regs.h> |
---|
23 | #include <mpc55xx/esci.h> |
---|
24 | #include <bsp/irq.h> |
---|
25 | |
---|
26 | #include <unistd.h> |
---|
27 | #include <termios.h> |
---|
28 | |
---|
29 | #include <rtems.h> |
---|
30 | #include <rtems/libio.h> |
---|
31 | #include <rtems/console.h> |
---|
32 | #include <rtems/bspIo.h> |
---|
33 | |
---|
34 | #define RTEMS_STATUS_CHECKS_USE_PRINTK |
---|
35 | |
---|
36 | #include <rtems/status-checks.h> |
---|
37 | |
---|
38 | /* Evil define conflicts */ |
---|
39 | #define TERMIOS_CR1 CR1 |
---|
40 | #undef CR1 |
---|
41 | #define TERMIOS_CR2 CR2 |
---|
42 | #undef CR2 |
---|
43 | |
---|
44 | #define MPC55XX_ESCI_IRQ_PRIORITY MPC55XX_INTC_DEFAULT_PRIORITY |
---|
45 | |
---|
46 | #define MPC55XX_ESCI_IS_MINOR_INVALD(minor) ((minor) < 0 || (minor) >= MPC55XX_ESCI_NUMBER) |
---|
47 | |
---|
48 | #define MPC55XX_ESCI_USE_INTERRUPTS(e) (!(e)->console && (e)->use_interrupts) |
---|
49 | |
---|
50 | /** |
---|
51 | * @brief eSCI driver table. |
---|
52 | */ |
---|
53 | mpc55xx_esci_driver_entry mpc55xx_esci_driver_table [MPC55XX_ESCI_NUMBER] = { { |
---|
54 | .regs = &ESCI_A, |
---|
55 | .device_name = "/dev/tty1", |
---|
56 | .use_termios = 1, |
---|
57 | .use_interrupts = 0, |
---|
58 | .console = 1, |
---|
59 | .tty = NULL, |
---|
60 | .irq_number = 146 |
---|
61 | }, { |
---|
62 | .regs = &ESCI_B, |
---|
63 | .device_name = "/dev/tty2", |
---|
64 | .use_termios = 1, |
---|
65 | .use_interrupts = 0, |
---|
66 | .console = 0, |
---|
67 | .tty = NULL, |
---|
68 | .irq_number = 149 |
---|
69 | } |
---|
70 | }; |
---|
71 | |
---|
72 | /** |
---|
73 | * @brief Default termios configuration. |
---|
74 | */ |
---|
75 | static const struct termios mpc55xx_esci_termios_default = { |
---|
76 | .c_cflag = CS8 | CREAD | CLOCAL | B115200 |
---|
77 | }; |
---|
78 | |
---|
79 | /** |
---|
80 | * @name Low-Level |
---|
81 | * @{ |
---|
82 | */ |
---|
83 | |
---|
84 | /** |
---|
85 | * @brief Reads one character from the receive register. |
---|
86 | * |
---|
87 | * @note Waits for the receive data register full flag. |
---|
88 | */ |
---|
89 | static inline uint8_t mpc55xx_esci_read_char( mpc55xx_esci_driver_entry *e) |
---|
90 | { |
---|
91 | volatile union ESCI_SR_tag *status = &e->regs->SR; |
---|
92 | volatile union ESCI_DR_tag *data = &e->regs->DR; |
---|
93 | union ESCI_SR_tag sr = MPC55XX_ZERO_FLAGS; |
---|
94 | |
---|
95 | while (status->B.RDRF == 0) { |
---|
96 | /* Wait */ |
---|
97 | } |
---|
98 | |
---|
99 | /* Clear flag */ |
---|
100 | sr.B.RDRF = 1; |
---|
101 | status->R = sr.R; |
---|
102 | |
---|
103 | /* Read */ |
---|
104 | return data->B.D; |
---|
105 | } |
---|
106 | |
---|
107 | /** |
---|
108 | * @brief Writes the character @a c to the transmit register. |
---|
109 | * |
---|
110 | * @note Waits for the transmit data register empty flag. |
---|
111 | */ |
---|
112 | static inline void mpc55xx_esci_write_char( mpc55xx_esci_driver_entry *e, uint8_t c) |
---|
113 | { |
---|
114 | volatile union ESCI_SR_tag *status = &e->regs->SR; |
---|
115 | volatile union ESCI_DR_tag *data = &e->regs->DR; |
---|
116 | union ESCI_SR_tag sr = MPC55XX_ZERO_FLAGS; |
---|
117 | rtems_interrupt_level level; |
---|
118 | |
---|
119 | /* Set clear flag */ |
---|
120 | sr.B.TDRE = 1; |
---|
121 | |
---|
122 | while (true) { |
---|
123 | rtems_interrupt_disable( level); |
---|
124 | if (status->B.TDRE != 0) { |
---|
125 | /* Clear flag */ |
---|
126 | status->R = sr.R; |
---|
127 | |
---|
128 | /* Write */ |
---|
129 | data->B.D = c; |
---|
130 | |
---|
131 | /* Done */ |
---|
132 | rtems_interrupt_enable( level); |
---|
133 | break; |
---|
134 | } |
---|
135 | rtems_interrupt_enable( level); |
---|
136 | |
---|
137 | while (status->B.TDRE == 0) { |
---|
138 | /* Wait */ |
---|
139 | } |
---|
140 | } |
---|
141 | } |
---|
142 | |
---|
143 | static inline void mpc55xx_esci_interrupts_enable( mpc55xx_esci_driver_entry *e) |
---|
144 | { |
---|
145 | union ESCI_CR1_tag cr1 = MPC55XX_ZERO_FLAGS; |
---|
146 | rtems_interrupt_level level; |
---|
147 | |
---|
148 | rtems_interrupt_disable( level); |
---|
149 | cr1.R = e->regs->CR1.R; |
---|
150 | cr1.B.RIE = 1; |
---|
151 | cr1.B.TIE = 1; |
---|
152 | e->regs->CR1.R = cr1.R; |
---|
153 | rtems_interrupt_enable( level); |
---|
154 | } |
---|
155 | |
---|
156 | static inline void mpc55xx_esci_interrupts_disable( mpc55xx_esci_driver_entry *e) |
---|
157 | { |
---|
158 | union ESCI_CR1_tag cr1 = MPC55XX_ZERO_FLAGS; |
---|
159 | rtems_interrupt_level level; |
---|
160 | |
---|
161 | rtems_interrupt_disable( level); |
---|
162 | cr1.R = e->regs->CR1.R; |
---|
163 | cr1.B.RIE = 0; |
---|
164 | cr1.B.TIE = 0; |
---|
165 | e->regs->CR1.R = cr1.R; |
---|
166 | rtems_interrupt_enable( level); |
---|
167 | } |
---|
168 | |
---|
169 | /** @} */ |
---|
170 | |
---|
171 | /** |
---|
172 | * @name Termios Support |
---|
173 | * @{ |
---|
174 | */ |
---|
175 | |
---|
176 | /** |
---|
177 | * @brief Opens port @a minor. |
---|
178 | * |
---|
179 | * @return Status code. |
---|
180 | */ |
---|
181 | static int mpc55xx_esci_termios_first_open( int major, int minor, void *arg) |
---|
182 | { |
---|
183 | int rv = 0; |
---|
184 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
185 | struct rtems_termios_tty *tty = ((rtems_libio_open_close_args_t *) arg)->iop->data1; |
---|
186 | |
---|
187 | /* Check minor number */ |
---|
188 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
189 | return RTEMS_INVALID_NUMBER; |
---|
190 | } |
---|
191 | |
---|
192 | /* Connect TTY */ |
---|
193 | e->tty = tty; |
---|
194 | |
---|
195 | /* Enable interrupts */ |
---|
196 | if (MPC55XX_ESCI_USE_INTERRUPTS( e)) { |
---|
197 | mpc55xx_esci_interrupts_enable( e); |
---|
198 | } |
---|
199 | |
---|
200 | rv = rtems_termios_set_initial_baud( e->tty, 115200); |
---|
201 | RTEMS_CHECK_RV_SC( rv, "Set initial baud"); |
---|
202 | |
---|
203 | return RTEMS_SUCCESSFUL; |
---|
204 | } |
---|
205 | |
---|
206 | /** |
---|
207 | * @brief Closes port @a minor. |
---|
208 | * |
---|
209 | * @return Status code. |
---|
210 | */ |
---|
211 | static int mpc55xx_esci_termios_last_close( int major, int minor, void* arg) |
---|
212 | { |
---|
213 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
214 | |
---|
215 | /* Check minor number */ |
---|
216 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
217 | return RTEMS_INVALID_NUMBER; |
---|
218 | } |
---|
219 | |
---|
220 | /* Disable interrupts */ |
---|
221 | mpc55xx_esci_interrupts_disable( e); |
---|
222 | |
---|
223 | /* Disconnect TTY */ |
---|
224 | e->tty = NULL; |
---|
225 | |
---|
226 | return RTEMS_SUCCESSFUL; |
---|
227 | } |
---|
228 | |
---|
229 | /** |
---|
230 | * @brief Reads one character from port @a minor. |
---|
231 | * |
---|
232 | * @return Returns the character or -1 on error. |
---|
233 | */ |
---|
234 | static int mpc55xx_esci_termios_poll_read( int minor) |
---|
235 | { |
---|
236 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
237 | volatile union ESCI_SR_tag *status = &e->regs->SR; |
---|
238 | volatile union ESCI_DR_tag *data = &e->regs->DR; |
---|
239 | union ESCI_SR_tag sr = MPC55XX_ZERO_FLAGS; |
---|
240 | |
---|
241 | if (status->B.RDRF == 0) { |
---|
242 | return -1; |
---|
243 | } |
---|
244 | |
---|
245 | /* Clear flag */ |
---|
246 | sr.B.RDRF = 1; |
---|
247 | status->R = sr.R; |
---|
248 | |
---|
249 | /* Read */ |
---|
250 | return data->B.D; |
---|
251 | } |
---|
252 | |
---|
253 | /** |
---|
254 | * @brief Writes @a n characters from @a out to port @a minor. |
---|
255 | * |
---|
256 | * @return Returns number of chars sent on success or -1 otherwise. |
---|
257 | */ |
---|
258 | static int mpc55xx_esci_termios_poll_write( int minor, const char *out, |
---|
259 | size_t n) |
---|
260 | { |
---|
261 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
262 | size_t i = 0; |
---|
263 | |
---|
264 | /* Check minor number */ |
---|
265 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
266 | return -1; |
---|
267 | } |
---|
268 | |
---|
269 | /* Write */ |
---|
270 | for (i = 0; i < n; ++i) { |
---|
271 | mpc55xx_esci_write_char( e, out [i]); |
---|
272 | } |
---|
273 | |
---|
274 | return n; |
---|
275 | } |
---|
276 | |
---|
277 | /** |
---|
278 | * @brief Writes one character from @a out to port @a minor. |
---|
279 | * |
---|
280 | * @return (always 0). |
---|
281 | * |
---|
282 | * @note The buffer @a out has to provide at least one character. |
---|
283 | * This function assumes that the transmit data register is empty. |
---|
284 | */ |
---|
285 | static int mpc55xx_esci_termios_write( int minor, const char *out, size_t n) |
---|
286 | { |
---|
287 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
288 | |
---|
289 | /* Write */ |
---|
290 | e->regs->DR.B.D = out [0]; |
---|
291 | |
---|
292 | return 0; |
---|
293 | } |
---|
294 | |
---|
295 | /* FIXME, TODO */ |
---|
296 | extern uint32_t bsp_clock_speed; |
---|
297 | |
---|
298 | /** |
---|
299 | * @brief Sets attributes of port @a minor according to termios attributes @a t. |
---|
300 | * |
---|
301 | * @return Status code. |
---|
302 | */ |
---|
303 | static int mpc55xx_esci_termios_set_attributes( int minor, const struct termios *t) |
---|
304 | { |
---|
305 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
306 | volatile struct ESCI_tag *regs = e->regs; |
---|
307 | union ESCI_CR1_tag cr1 = MPC55XX_ZERO_FLAGS; |
---|
308 | union ESCI_CR2_tag cr2 = MPC55XX_ZERO_FLAGS; |
---|
309 | unsigned br = 0; |
---|
310 | |
---|
311 | /* Check minor number */ |
---|
312 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
313 | return RTEMS_INVALID_NUMBER; |
---|
314 | } |
---|
315 | |
---|
316 | /* Enable module */ |
---|
317 | cr2.B.MDIS = 0; |
---|
318 | |
---|
319 | /* Interrupts */ |
---|
320 | if (MPC55XX_ESCI_USE_INTERRUPTS( e) && e->tty != NULL) { |
---|
321 | cr1.B.RIE = 1; |
---|
322 | cr1.B.TIE = 1; |
---|
323 | } else { |
---|
324 | cr1.B.RIE = 0; |
---|
325 | cr1.B.TIE = 0; |
---|
326 | } |
---|
327 | cr1.B.TCIE = 0; |
---|
328 | cr1.B.ILIE = 0; |
---|
329 | cr2.B.IEBERR = 0; |
---|
330 | cr2.B.ORIE = 0; |
---|
331 | cr2.B.NFIE = 0; |
---|
332 | cr2.B.FEIE = 0; |
---|
333 | cr2.B.PFIE = 0; |
---|
334 | |
---|
335 | /* Disable receiver wake-up standby */ |
---|
336 | cr1.B.RWU = 0; |
---|
337 | |
---|
338 | /* Disable DMA channels */ |
---|
339 | cr2.B.RXDMA = 0; |
---|
340 | cr2.B.TXDMA = 0; |
---|
341 | |
---|
342 | /* Idle line type */ |
---|
343 | cr1.B.ILT = 0; |
---|
344 | |
---|
345 | /* Disable loops */ |
---|
346 | cr1.B.LOOPS = 0; |
---|
347 | |
---|
348 | /* Enable or disable receiver */ |
---|
349 | cr1.B.RE = (t->c_cflag & CREAD) ? 1 : 0; |
---|
350 | |
---|
351 | /* Enable transmitter */ |
---|
352 | cr1.B.TE = 1; |
---|
353 | |
---|
354 | /* Baud rate */ |
---|
355 | switch (t->c_cflag & CBAUD) { |
---|
356 | case B50: br = 50; break; |
---|
357 | case B75: br = 75; break; |
---|
358 | case B110: br = 110; break; |
---|
359 | case B134: br = 134; break; |
---|
360 | case B150: br = 150; break; |
---|
361 | case B200: br = 200; break; |
---|
362 | case B300: br = 300; break; |
---|
363 | case B600: br = 600; break; |
---|
364 | case B1200: br = 1200; break; |
---|
365 | case B1800: br = 1800; break; |
---|
366 | case B2400: br = 2400; break; |
---|
367 | case B4800: br = 4800; break; |
---|
368 | case B9600: br = 9600; break; |
---|
369 | case B19200: br = 19200; break; |
---|
370 | case B38400: br = 38400; break; |
---|
371 | case B57600: br = 57600; break; |
---|
372 | case B115200: br = 115200; break; |
---|
373 | case B230400: br = 230400; break; |
---|
374 | case B460800: br = 460800; break; |
---|
375 | default: br = 0; break; |
---|
376 | } |
---|
377 | if (br > 0) { |
---|
378 | br = bsp_clock_speed / (16 * br); |
---|
379 | br = (br > 8191) ? 8191 : br; |
---|
380 | } else { |
---|
381 | br = 0; |
---|
382 | } |
---|
383 | cr1.B.SBR = br; |
---|
384 | |
---|
385 | /* Number of data bits */ |
---|
386 | if ((t->c_cflag & CSIZE) != CS8) { |
---|
387 | return RTEMS_IO_ERROR; |
---|
388 | } |
---|
389 | cr1.B.M = 0; |
---|
390 | |
---|
391 | /* Parity */ |
---|
392 | cr1.B.PE = (t->c_cflag & PARENB) ? 1 : 0; |
---|
393 | cr1.B.PT = (t->c_cflag & PARODD) ? 1 : 0; |
---|
394 | |
---|
395 | /* Stop bits */ |
---|
396 | if ( t->c_cflag & CSTOPB ) { |
---|
397 | /* Two stop bits */ |
---|
398 | return RTEMS_IO_ERROR; |
---|
399 | } |
---|
400 | |
---|
401 | /* Set control registers */ |
---|
402 | regs->CR1.R = cr1.R; |
---|
403 | regs->CR2.R = cr2.R; |
---|
404 | |
---|
405 | /* Disable LIN */ |
---|
406 | regs->LCR.R = 0; |
---|
407 | |
---|
408 | return RTEMS_SUCCESSFUL; |
---|
409 | } |
---|
410 | |
---|
411 | /** |
---|
412 | * @brief Interrupt handler. |
---|
413 | */ |
---|
414 | static void mpc55xx_esci_termios_interrupt_handler( void *arg) |
---|
415 | { |
---|
416 | mpc55xx_esci_driver_entry *e = (mpc55xx_esci_driver_entry *) arg; |
---|
417 | volatile union ESCI_SR_tag *status = &e->regs->SR; |
---|
418 | volatile union ESCI_DR_tag *data = &e->regs->DR; |
---|
419 | union ESCI_SR_tag sr = MPC55XX_ZERO_FLAGS; |
---|
420 | union ESCI_SR_tag active = MPC55XX_ZERO_FLAGS; |
---|
421 | |
---|
422 | /* Status */ |
---|
423 | sr.R = status->R; |
---|
424 | |
---|
425 | /* Receive data register full? */ |
---|
426 | if (sr.B.RDRF != 0) { |
---|
427 | active.B.RDRF = 1; |
---|
428 | } |
---|
429 | |
---|
430 | /* Transmit data register empty? */ |
---|
431 | if (sr.B.TDRE != 0) { |
---|
432 | active.B.TDRE = 1; |
---|
433 | } |
---|
434 | |
---|
435 | /* Clear flags */ |
---|
436 | status->R = active.R; |
---|
437 | |
---|
438 | /* Enqueue */ |
---|
439 | if (active.B.RDRF != 0) { |
---|
440 | char c = data->B.D; |
---|
441 | rtems_termios_enqueue_raw_characters( e->tty, &c, 1); |
---|
442 | } |
---|
443 | |
---|
444 | /* Dequeue */ |
---|
445 | if (active.B.TDRE != 0) { |
---|
446 | rtems_termios_dequeue_characters( e->tty, 1); |
---|
447 | } |
---|
448 | } |
---|
449 | |
---|
450 | /** @} */ |
---|
451 | |
---|
452 | /** |
---|
453 | * @brief Termios callbacks with interrupt support. |
---|
454 | */ |
---|
455 | static const rtems_termios_callbacks mpc55xx_esci_termios_callbacks = { |
---|
456 | .firstOpen = mpc55xx_esci_termios_first_open, |
---|
457 | .lastClose = mpc55xx_esci_termios_last_close, |
---|
458 | .pollRead = NULL, |
---|
459 | .write = mpc55xx_esci_termios_write, |
---|
460 | .setAttributes = mpc55xx_esci_termios_set_attributes, |
---|
461 | .stopRemoteTx = NULL, |
---|
462 | .startRemoteTx = NULL, |
---|
463 | .outputUsesInterrupts = TERMIOS_IRQ_DRIVEN |
---|
464 | }; |
---|
465 | |
---|
466 | /** |
---|
467 | * @brief Termios callbacks with polling functions (no interrupts). |
---|
468 | */ |
---|
469 | static const rtems_termios_callbacks mpc55xx_esci_termios_callbacks_polled = { |
---|
470 | .firstOpen = mpc55xx_esci_termios_first_open, |
---|
471 | .lastClose = mpc55xx_esci_termios_last_close, |
---|
472 | .pollRead = mpc55xx_esci_termios_poll_read, |
---|
473 | .write = mpc55xx_esci_termios_poll_write, |
---|
474 | .setAttributes = mpc55xx_esci_termios_set_attributes, |
---|
475 | .stopRemoteTx = NULL, |
---|
476 | .startRemoteTx = NULL, |
---|
477 | .outputUsesInterrupts = TERMIOS_POLLED |
---|
478 | }; |
---|
479 | |
---|
480 | /** |
---|
481 | * @name Console Driver |
---|
482 | * @{ |
---|
483 | */ |
---|
484 | |
---|
485 | rtems_device_driver console_initialize( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
486 | { |
---|
487 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
488 | int console_done = 0; |
---|
489 | int termios_do_init = 1; |
---|
490 | rtems_device_minor_number i = 0; |
---|
491 | mpc55xx_esci_driver_entry *e = NULL; |
---|
492 | |
---|
493 | for (i = 0; i < MPC55XX_ESCI_NUMBER; ++i) { |
---|
494 | e = &mpc55xx_esci_driver_table [i]; |
---|
495 | sc = rtems_io_register_name ( e->device_name, major, i); |
---|
496 | RTEMS_CHECK_SC( sc, "Register IO device"); |
---|
497 | if (e->console) { |
---|
498 | if (console_done) { |
---|
499 | RTEMS_SYSLOG_WARNING( "Multiple console ports defined\n"); |
---|
500 | } else { |
---|
501 | console_done = 1; |
---|
502 | if (e->use_interrupts) { |
---|
503 | RTEMS_SYSLOG_WARNING( "Cannot use interrupts for console port\n"); |
---|
504 | } |
---|
505 | sc = rtems_io_register_name( CONSOLE_DEVICE_NAME, major, i); |
---|
506 | RTEMS_CHECK_SC( sc, "Register IO device"); |
---|
507 | } |
---|
508 | } |
---|
509 | if (e->use_termios && termios_do_init) { |
---|
510 | if (termios_do_init) { |
---|
511 | termios_do_init = 0; |
---|
512 | rtems_termios_initialize(); |
---|
513 | } |
---|
514 | if (MPC55XX_ESCI_USE_INTERRUPTS( e)) { |
---|
515 | sc = mpc55xx_interrupt_handler_install( |
---|
516 | e->irq_number, |
---|
517 | "eSCI", |
---|
518 | RTEMS_INTERRUPT_UNIQUE, |
---|
519 | MPC55XX_ESCI_IRQ_PRIORITY, |
---|
520 | mpc55xx_esci_termios_interrupt_handler, |
---|
521 | e |
---|
522 | ); |
---|
523 | RTEMS_CHECK_SC( sc, "Install IRQ handler"); |
---|
524 | } |
---|
525 | } |
---|
526 | mpc55xx_esci_termios_set_attributes( (int) i, &mpc55xx_esci_termios_default); |
---|
527 | } |
---|
528 | |
---|
529 | return RTEMS_SUCCESSFUL; |
---|
530 | } |
---|
531 | |
---|
532 | rtems_device_driver console_open( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
533 | { |
---|
534 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
535 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
536 | |
---|
537 | /* Check minor number */ |
---|
538 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
539 | return RTEMS_INVALID_NUMBER; |
---|
540 | } |
---|
541 | |
---|
542 | if (e->use_termios) { |
---|
543 | if (MPC55XX_ESCI_USE_INTERRUPTS( e)) { |
---|
544 | sc = rtems_termios_open( major, minor, arg, &mpc55xx_esci_termios_callbacks); |
---|
545 | } else { |
---|
546 | sc = rtems_termios_open( major, minor, arg, &mpc55xx_esci_termios_callbacks_polled); |
---|
547 | } |
---|
548 | RTEMS_CHECK_SC( sc, "Open"); |
---|
549 | } |
---|
550 | |
---|
551 | return RTEMS_SUCCESSFUL; |
---|
552 | } |
---|
553 | |
---|
554 | rtems_device_driver console_close( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
555 | { |
---|
556 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
557 | |
---|
558 | /* Check minor number */ |
---|
559 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
560 | return RTEMS_INVALID_NUMBER; |
---|
561 | } |
---|
562 | |
---|
563 | if (e->use_termios) { |
---|
564 | return rtems_termios_close( arg); |
---|
565 | } |
---|
566 | |
---|
567 | return RTEMS_SUCCESSFUL; |
---|
568 | } |
---|
569 | |
---|
570 | rtems_device_driver console_read( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
571 | { |
---|
572 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
573 | |
---|
574 | /* Check minor number */ |
---|
575 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
576 | return RTEMS_INVALID_NUMBER; |
---|
577 | } |
---|
578 | |
---|
579 | if (e->use_termios) { |
---|
580 | return rtems_termios_read( arg); |
---|
581 | } else { |
---|
582 | rtems_libio_rw_args_t *rw = (rtems_libio_rw_args_t *) arg; |
---|
583 | uint32_t i = 0; |
---|
584 | while (i < rw->count) { |
---|
585 | rw->buffer [i] = mpc55xx_esci_read_char( e); |
---|
586 | ++i; |
---|
587 | } |
---|
588 | rw->bytes_moved = i; |
---|
589 | } |
---|
590 | |
---|
591 | return RTEMS_SUCCESSFUL; |
---|
592 | } |
---|
593 | |
---|
594 | rtems_device_driver console_write( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
595 | { |
---|
596 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
597 | |
---|
598 | /* Check minor number */ |
---|
599 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
600 | return RTEMS_INVALID_NUMBER; |
---|
601 | } |
---|
602 | |
---|
603 | if (e->use_termios) { |
---|
604 | return rtems_termios_write( arg); |
---|
605 | } else { |
---|
606 | rtems_libio_rw_args_t *rw = (rtems_libio_rw_args_t *) arg; |
---|
607 | uint32_t i = 0; |
---|
608 | while (i < rw->count) { |
---|
609 | mpc55xx_esci_write_char( e, rw->buffer [i]); |
---|
610 | if (rw->buffer [i] == '\n') { |
---|
611 | mpc55xx_esci_write_char( e, '\r'); |
---|
612 | } |
---|
613 | ++i; |
---|
614 | } |
---|
615 | rw->bytes_moved = i; |
---|
616 | } |
---|
617 | |
---|
618 | return RTEMS_SUCCESSFUL; |
---|
619 | } |
---|
620 | |
---|
621 | rtems_device_driver console_control( rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
---|
622 | { |
---|
623 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [minor]; |
---|
624 | |
---|
625 | /* Check minor number */ |
---|
626 | if (MPC55XX_ESCI_IS_MINOR_INVALD( minor)) { |
---|
627 | return RTEMS_INVALID_NUMBER; |
---|
628 | } |
---|
629 | |
---|
630 | if (e->use_termios) { |
---|
631 | return rtems_termios_ioctl( arg); |
---|
632 | } |
---|
633 | |
---|
634 | return RTEMS_NOT_DEFINED; |
---|
635 | } |
---|
636 | |
---|
637 | /** @} */ |
---|
638 | |
---|
639 | /** |
---|
640 | * @brief Port number for the BSP character output function. |
---|
641 | * |
---|
642 | * The correct value will be set by mpc55xx_esci_output_char_init(). |
---|
643 | */ |
---|
644 | static int mpc55xx_esci_output_char_minor = 0; |
---|
645 | |
---|
646 | /** |
---|
647 | * @name BSP Character Output |
---|
648 | * @{ |
---|
649 | */ |
---|
650 | |
---|
651 | static void mpc55xx_esci_output_char( char c) |
---|
652 | { |
---|
653 | mpc55xx_esci_driver_entry *e = &mpc55xx_esci_driver_table [mpc55xx_esci_output_char_minor]; |
---|
654 | |
---|
655 | mpc55xx_esci_interrupts_disable( e); |
---|
656 | mpc55xx_esci_write_char( e, c); |
---|
657 | if (c == '\n') { |
---|
658 | mpc55xx_esci_write_char( e, '\r'); |
---|
659 | } |
---|
660 | mpc55xx_esci_interrupts_enable( e); |
---|
661 | } |
---|
662 | |
---|
663 | static void mpc55xx_esci_output_char_nop( char c) |
---|
664 | { |
---|
665 | /* Do nothing */ |
---|
666 | } |
---|
667 | |
---|
668 | static void mpc55xx_esci_output_char_init( char c) |
---|
669 | { |
---|
670 | bool console_found = false; |
---|
671 | int i = 0; |
---|
672 | |
---|
673 | for (i = 0; i < MPC55XX_ESCI_NUMBER; ++i) { |
---|
674 | if (mpc55xx_esci_driver_table [i].console) { |
---|
675 | console_found = true; |
---|
676 | mpc55xx_esci_output_char_minor = i; |
---|
677 | break; |
---|
678 | } |
---|
679 | } |
---|
680 | |
---|
681 | if (console_found) { |
---|
682 | BSP_output_char = mpc55xx_esci_output_char; |
---|
683 | mpc55xx_esci_termios_set_attributes( mpc55xx_esci_output_char_minor, &mpc55xx_esci_termios_default); |
---|
684 | mpc55xx_esci_output_char( c); |
---|
685 | } else { |
---|
686 | BSP_output_char = mpc55xx_esci_output_char_nop; |
---|
687 | } |
---|
688 | } |
---|
689 | |
---|
690 | /** @} */ |
---|
691 | |
---|
692 | BSP_output_char_function_type BSP_output_char = mpc55xx_esci_output_char_init; |
---|