source: rtems/c/src/lib/libcpu/sh/sh7750/sci/console.c @ 4cf920c4

4.104.114.84.95
Last change on this file since 4cf920c4 was f08c3a86, checked in by Joel Sherrill <joel.sherrill@…>, on 10/12/01 at 21:00:22

2001-10-12 Joel Sherrill <joel@…>

  • clock/ckinit.c, include/iosh7750.h, include/ipl.h, include/ispsh7750.h, sci/console.c, sci/sh4uart.c, score/cpu_asm.c, score/ispsh7750.c, timer/timer.c: Fixed typo.
  • Property mode set to 100644
File size: 12.3 KB
Line 
1/*
2 * Console driver for SH-4 UART modules
3 *
4 * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia
5 * Author: Alexandra Kossovsky <sasha@oktet.ru>
6 *
7 *  COPYRIGHT (c) 1989-1998.
8 *  On-Line Applications Research Corporation (OAR).
9 *
10 *  The license and distribution terms for this file may be
11 *  found in the file LICENSE in this distribution or at
12 *
13 *  http://www.OARcorp.com/rtems/license.html.
14 *
15 *  $Id$
16 */
17
18#include <termios.h>
19#include <rtems/libio.h>
20#include "sh/sh4uart.h"
21
22/* Descriptor structures for two on-chip UART channels */
23sh4uart sh4_uarts[2];
24
25/* Console operations mode:
26 *     0 - raw (non-termios) polled input/output
27 *     1 - termios-based polled input/output
28 *     2 - termios-based interrupt-driven input/output
29 *     3 - non-termios over gdb stub
30 */
31int console_mode = 3;
32#define CONSOLE_MODE_RAW  (0)
33#define CONSOLE_MODE_POLL (1)
34#define CONSOLE_MODE_INT  (2)
35#define CONSOLE_MODE_IPL  (3)
36
37/* Wrapper functions for SH-4 UART generic driver */
38
39/* console_poll_read --
40 *     wrapper for poll read function
41 *
42 * PARAMETERS:
43 *     minor - minor device number
44 *
45 * RETURNS:
46 *     character code readed from UART, or -1 if there is no characters
47 *     available
48 */
49static int
50console_poll_read(int minor)
51{
52        return sh4uart_poll_read(&sh4_uarts[minor]);
53}
54
55/* console_interrupt_write --
56 *     wrapper for interrupt write function
57 *
58 * PARAMETERS:
59 *     minor - minor device number
60 *     buf - output buffer
61 *     len - output buffer length
62 *
63 * RETURNS:
64 *     result code
65 */
66static int
67console_interrupt_write(int minor, const char *buf, int len)
68{
69        return sh4uart_interrupt_write(&sh4_uarts[minor], buf, len);
70}
71
72/* console_poll_write --
73 *     wrapper for polling mode write function
74 *
75 * PARAMETERS:
76 *     minor - minor device number
77 *     buf - output buffer
78 *     len - output buffer length
79 *
80 * RETURNS:
81 *     result code
82 */
83static int
84console_poll_write(int minor, const char *buf, int len)
85{
86        return sh4uart_poll_write(&sh4_uarts[minor], buf, len);
87}
88
89/* console_set_attributes --
90 *     wrapper for hardware-dependent termios attributes setting
91 *
92 * PARAMETERS:
93 *     minor - minor device number
94 *     t - pointer to the termios structure
95 *
96 * RETURNS:
97 *     result code
98 */
99static int
100console_set_attributes(int minor, const struct termios *t)
101{
102        return sh4uart_set_attributes(&sh4_uarts[minor], t);
103}
104
105/* console_stop_remote_tx --
106 *     wrapper for stopping data flow from remote party.
107 *
108 * PARAMETERS:
109 *     minor - minor device number
110 *
111 * RETURNS:
112 *     result code
113 */
114static int
115console_stop_remote_tx(int minor)
116{
117    if (minor < sizeof(sh4_uarts)/sizeof(sh4_uarts[0]))
118        return sh4uart_stop_remote_tx(&sh4_uarts[minor]);
119    else
120        return RTEMS_INVALID_NUMBER;
121}
122
123/* console_start_remote_tx --
124 *     wrapper for resuming data flow from remote party.
125 *
126 * PARAMETERS:
127 *     minor - minor device number
128 *
129 */
130static int
131console_start_remote_tx(int minor)
132{
133    if (minor < sizeof(sh4_uarts)/sizeof(sh4_uarts[0]))
134        return sh4uart_start_remote_tx(&sh4_uarts[minor]);
135    else
136        return RTEMS_INVALID_NUMBER;
137}
138
139/* console_first_open --
140 *     wrapper for UART controller initialization functions
141 *
142 * PARAMETERS:
143 *     major - major device number
144 *     minor - minor device number
145 *     arg - libio device open argument
146 *
147 * RETURNS:
148 *     error code
149 */
150static int
151console_first_open(int major, int minor, void *arg)
152{
153    rtems_libio_open_close_args_t *args = arg;
154    rtems_status_code sc;
155
156    sc = sh4uart_init(&sh4_uarts[minor], /* uart */
157            args->iop->data1,       /* tty */
158            minor+1,                /* channel */
159            (console_mode == CONSOLE_MODE_INT));
160   
161    if (sc == RTEMS_SUCCESSFUL)
162        sc = sh4uart_reset(&sh4_uarts[minor]);
163   
164    return sc;
165}
166
167/* console_last_close --
168 *     wrapper for UART controller close function
169 *
170 * PARAMETERS:
171 *     major - major device number
172 *     minor - minor device number
173 *     arg - libio device close argument
174 *
175 * RETURNS:
176 *     error code
177 */
178static int
179console_last_close(int major, int minor, void *arg)
180{
181    return sh4uart_disable(&sh4_uarts[minor]);
182}
183
184/* console_reserve_resources --
185 *     reserve termios resources for 2 UART channels
186 *
187 * PARAMETERS:
188 *     configuration -- pointer to the RTEMS configuration table
189 *
190 * RETURNS:
191 *     none
192 */
193void
194console_reserve_resources(rtems_configuration_table *configuration)
195{
196    if ((console_mode != CONSOLE_MODE_RAW) &&
197            (console_mode != CONSOLE_MODE_IPL))
198        rtems_termios_reserve_resources (configuration, 2);
199}
200
201/* console_initialize --
202 *     This routine initializes the console IO drivers and register devices
203 *     in RTEMS I/O system.
204 *
205 * PARAMETERS:
206 *     major - major console device number
207 *     minor - minor console device number (not used)
208 *     arg - device initialize argument
209 *
210 * RETURNS:
211 *     RTEMS error code (RTEMS_SUCCESSFUL if device initialized successfuly)
212 */
213rtems_device_driver
214console_initialize(rtems_device_major_number major,
215        rtems_device_minor_number minor,
216        void *arg)
217{
218    rtems_status_code status;
219
220#ifdef SH4_WITH_IPL
221    /* booting from flash we cannot have IPL console */
222    if (boot_mode != SH4_BOOT_MODE_IPL && console_mode == CONSOLE_MODE_IPL)
223        console_mode = CONSOLE_MODE_INT;
224
225    /* break out from gdb if neccessary */
226    if (boot_mode == SH4_BOOT_MODE_IPL && console_mode != CONSOLE_MODE_IPL)
227        ipl_finish();
228#endif
229
230    /*
231     * Set up TERMIOS
232     */
233    if ((console_mode != CONSOLE_MODE_RAW) &&
234                    (console_mode != CONSOLE_MODE_IPL))
235        rtems_termios_initialize ();
236   
237    /*
238     * Register the devices
239     */
240    status = rtems_io_register_name ("/dev/console", major, 0);
241    if (status != RTEMS_SUCCESSFUL)
242        rtems_fatal_error_occurred (status);
243
244    status = rtems_io_register_name ("/dev/aux", major, 1);
245    if (status != RTEMS_SUCCESSFUL)
246        rtems_fatal_error_occurred (status);
247
248    if (console_mode == CONSOLE_MODE_RAW)
249    {
250        rtems_status_code sc;
251        sc = sh4uart_init(&sh4_uarts[0],              /* uart */
252                NULL,                  /* tty */
253                1,                     /* UART channel number */
254                0);                    /* Poll-mode */
255
256        if (sc == RTEMS_SUCCESSFUL)
257            sc = sh4uart_reset(&sh4_uarts[0]);
258
259        sc = sh4uart_init(&sh4_uarts[1],              /* uart */
260                NULL,                  /* tty */
261                2,                     /* UART channel number */
262                0);                    /* Poll-mode */
263
264        if (sc == RTEMS_SUCCESSFUL)
265            sc = sh4uart_reset(&sh4_uarts[1]);
266
267        return sc;
268    }                       
269
270    return RTEMS_SUCCESSFUL;
271}
272
273/* console_open --
274 *     Open console device driver. Pass appropriate termios callback
275 *     functions to termios library.
276 *
277 * PARAMETERS:
278 *     major - major device number for console devices
279 *     minor - minor device number for console
280 *     arg - device opening argument
281 *
282 * RETURNS:
283 *     RTEMS error code
284 */
285rtems_device_driver
286console_open(rtems_device_major_number major,
287        rtems_device_minor_number minor,
288        void *arg)
289{
290    static const rtems_termios_callbacks intr_callbacks = {
291        console_first_open,        /* firstOpen */
292        console_last_close,        /* lastClose */
293        NULL,                      /* pollRead */
294        console_interrupt_write,   /* write */
295        console_set_attributes,    /* setAttributes */
296        console_stop_remote_tx,    /* stopRemoteTx */
297        console_start_remote_tx,   /* startRemoteTx */
298        1                          /* outputUsesInterrupts */
299    };
300    static const rtems_termios_callbacks poll_callbacks = {
301        console_first_open,        /* firstOpen */
302        console_last_close,        /* lastClose */
303        console_poll_read,         /* pollRead */
304        console_poll_write,        /* write */
305        console_set_attributes,    /* setAttributes */
306        console_stop_remote_tx,    /* stopRemoteTx */
307        console_start_remote_tx,   /* startRemoteTx */
308        0                          /* outputUsesInterrupts */
309    };
310
311    switch (console_mode)
312    {
313        case CONSOLE_MODE_RAW:
314        case CONSOLE_MODE_IPL:
315            return RTEMS_SUCCESSFUL;
316
317        case CONSOLE_MODE_INT:
318            return rtems_termios_open(major, minor, arg, &intr_callbacks);
319
320        case CONSOLE_MODE_POLL:
321            return rtems_termios_open(major, minor, arg, &poll_callbacks);
322
323        default:
324            rtems_fatal_error_occurred(0xC07A1310);
325    }
326
327    return RTEMS_INTERNAL_ERROR;
328}
329
330/* console_close --
331 *     Close console device.
332 *
333 * PARAMETERS:
334 *     major - major device number for console devices
335 *     minor - minor device number for console
336 *     arg - device close argument
337 *
338 * RETURNS:
339 *     RTEMS error code
340 */
341rtems_device_driver
342console_close(rtems_device_major_number major,
343        rtems_device_minor_number minor,
344        void *arg)
345{
346    if ((console_mode != CONSOLE_MODE_RAW) &&
347            (console_mode != CONSOLE_MODE_IPL))
348        return rtems_termios_close (arg);
349    else
350        return RTEMS_SUCCESSFUL;
351}   
352
353/* console_read --
354 *     Read from the console device
355 *
356 * PARAMETERS:
357 *     major - major device number for console devices
358 *     minor - minor device number for console
359 *     arg - device read argument
360 *
361 * RETURNS:
362 *     RTEMS error code
363 */
364rtems_device_driver
365console_read(rtems_device_major_number major,
366        rtems_device_minor_number minor,
367        void *arg)
368{
369    if ((console_mode != CONSOLE_MODE_RAW) &&
370            (console_mode != CONSOLE_MODE_IPL))
371    {
372        return rtems_termios_read (arg);
373    }
374    else
375    {
376        rtems_libio_rw_args_t *argp = arg;
377        char *buf = argp->buffer;
378        int count = argp->count;
379        int n = 0;
380        int c;
381        while (n < count)
382        {
383            do {
384                c = (console_mode == CONSOLE_MODE_RAW) ?
385                        sh4uart_poll_read(&sh4_uarts[minor]) :
386                        ipl_console_poll_read(minor);
387            } while (c == -1);
388            if (c == '\r')
389                c = '\n';
390            *(buf++) = c;
391            n++;
392            if (c == '\n')
393                break;
394        }
395        argp->bytes_moved = n;
396        return RTEMS_SUCCESSFUL;
397    }
398}
399
400/* console_write --
401 *     Write to the console device
402 *
403 * PARAMETERS:
404 *     major - major device number for console devices
405 *     minor - minor device number for console
406 *     arg - device write argument
407 *
408 * RETURNS:
409 *     RTEMS error code
410 */
411rtems_device_driver
412console_write(rtems_device_major_number major,
413        rtems_device_minor_number minor,
414        void *arg)
415{
416    switch (console_mode)
417    {
418        case CONSOLE_MODE_POLL:
419        case CONSOLE_MODE_INT:
420                return rtems_termios_write (arg);
421        case CONSOLE_MODE_RAW:
422        {
423            rtems_libio_rw_args_t *argp = arg;
424            char cr = '\r';
425            char *buf = argp->buffer;
426            int count = argp->count;
427            int i;
428           
429            for (i = 0; i < count; i++)
430            {
431                if (*buf == '\n')
432                    sh4uart_poll_write(&sh4_uarts[minor], &cr, 1);
433                sh4uart_poll_write(&sh4_uarts[minor], buf, 1);
434                buf++;
435            }
436            argp->bytes_moved = count;
437            return RTEMS_SUCCESSFUL;
438        }
439#ifdef SH4_WITH_IPL
440        case CONSOLE_MODE_IPL:
441        {
442            rtems_libio_rw_args_t *argp = arg;
443            char *buf = argp->buffer;
444            int count = argp->count;
445            ipl_console_poll_write(minor, buf, count);
446            argp->bytes_moved = count;
447            return RTEMS_SUCCESSFUL;
448        }
449#endif
450        default: /* Unreachable */
451            return RTEMS_NOT_DEFINED;
452    }
453}
454
455/* console_control --
456 *     Handle console device I/O control (IOCTL)
457 *
458 * PARAMETERS:
459 *     major - major device number for console devices
460 *     minor - minor device number for console
461 *     arg - device ioctl argument
462 *
463 * RETURNS:
464 *     RTEMS error code
465 */
466rtems_device_driver
467console_control(rtems_device_major_number major,
468        rtems_device_minor_number minor,
469        void *arg)
470{
471    if ((console_mode != CONSOLE_MODE_RAW) &&
472            (console_mode != CONSOLE_MODE_IPL))
473    {
474        return rtems_termios_ioctl (arg);
475    }
476    else
477    {
478        return RTEMS_SUCCESSFUL;
479    }
480}
481
482
483
Note: See TracBrowser for help on using the repository browser.